diff options
author | Latchesar Ionkov <lucho@ionkov.net> | 2007-07-10 17:57:28 -0500 |
---|---|---|
committer | Eric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com> | 2007-07-14 15:13:40 -0500 |
commit | bd238fb431f31989898423c8b6496bc8c4204a86 (patch) | |
tree | f85a536383cbf360125ecb0592f6c515e0ecf0ff | |
parent | 8d9107e8c50e1c4ff43c91c8841805833f3ecfb9 (diff) | |
download | kernel_samsung_espresso10-bd238fb431f31989898423c8b6496bc8c4204a86.zip kernel_samsung_espresso10-bd238fb431f31989898423c8b6496bc8c4204a86.tar.gz kernel_samsung_espresso10-bd238fb431f31989898423c8b6496bc8c4204a86.tar.bz2 |
9p: Reorganization of 9p file system code
This patchset moves non-filesystem interfaces of v9fs from fs/9p to net/9p.
It moves the transport, packet marshalling and connection layers to net/9p
leaving only the VFS related files in fs/9p. This work is being done in
preparation for in-kernel 9p servers as well as alternate 9p clients (other
than VFS).
Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
-rw-r--r-- | fs/9p/9p.h | 375 | ||||
-rw-r--r-- | fs/9p/Makefile | 6 | ||||
-rw-r--r-- | fs/9p/conv.h | 50 | ||||
-rw-r--r-- | fs/9p/debug.h | 77 | ||||
-rw-r--r-- | fs/9p/error.c | 93 | ||||
-rw-r--r-- | fs/9p/fcall.c | 427 | ||||
-rw-r--r-- | fs/9p/fid.c | 168 | ||||
-rw-r--r-- | fs/9p/fid.h | 43 | ||||
-rw-r--r-- | fs/9p/trans_fd.c | 308 | ||||
-rw-r--r-- | fs/9p/v9fs.c | 288 | ||||
-rw-r--r-- | fs/9p/v9fs.h | 32 | ||||
-rw-r--r-- | fs/9p/v9fs_vfs.h | 6 | ||||
-rw-r--r-- | fs/9p/vfs_addr.c | 57 | ||||
-rw-r--r-- | fs/9p/vfs_dentry.c | 37 | ||||
-rw-r--r-- | fs/9p/vfs_dir.c | 155 | ||||
-rw-r--r-- | fs/9p/vfs_file.c | 160 | ||||
-rw-r--r-- | fs/9p/vfs_inode.c | 753 | ||||
-rw-r--r-- | fs/9p/vfs_super.c | 91 | ||||
-rw-r--r-- | fs/Kconfig | 2 | ||||
-rw-r--r-- | include/net/9p/9p.h | 417 | ||||
-rw-r--r-- | include/net/9p/client.h | 80 | ||||
-rw-r--r-- | include/net/9p/conn.h (renamed from fs/9p/mux.h) | 42 | ||||
-rw-r--r-- | include/net/9p/transport.h (renamed from fs/9p/transport.h) | 28 | ||||
-rw-r--r-- | net/9p/Kconfig | 21 | ||||
-rw-r--r-- | net/9p/Makefile | 13 | ||||
-rw-r--r-- | net/9p/client.c | 965 | ||||
-rw-r--r-- | net/9p/conv.c (renamed from fs/9p/conv.c) | 424 | ||||
-rw-r--r-- | net/9p/error.c (renamed from fs/9p/error.h) | 79 | ||||
-rw-r--r-- | net/9p/fcprint.c (renamed from fs/9p/fcprint.c) | 187 | ||||
-rw-r--r-- | net/9p/mod.c | 85 | ||||
-rw-r--r-- | net/9p/mux.c (renamed from fs/9p/mux.c) | 509 | ||||
-rw-r--r-- | net/9p/sysctl.c | 86 | ||||
-rw-r--r-- | net/9p/trans_fd.c | 363 | ||||
-rw-r--r-- | net/9p/util.c | 125 | ||||
-rw-r--r-- | net/Kconfig | 1 | ||||
-rw-r--r-- | net/Makefile | 1 |
36 files changed, 3423 insertions, 3131 deletions
diff --git a/fs/9p/9p.h b/fs/9p/9p.h deleted file mode 100644 index 94e2f92..0000000 --- a/fs/9p/9p.h +++ /dev/null @@ -1,375 +0,0 @@ -/* - * linux/fs/9p/9p.h - * - * 9P protocol definitions. - * - * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> - * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> - * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to: - * Free Software Foundation - * 51 Franklin Street, Fifth Floor - * Boston, MA 02111-1301 USA - * - */ - -/* Message Types */ -enum { - TVERSION = 100, - RVERSION, - TAUTH = 102, - RAUTH, - TATTACH = 104, - RATTACH, - TERROR = 106, - RERROR, - TFLUSH = 108, - RFLUSH, - TWALK = 110, - RWALK, - TOPEN = 112, - ROPEN, - TCREATE = 114, - RCREATE, - TREAD = 116, - RREAD, - TWRITE = 118, - RWRITE, - TCLUNK = 120, - RCLUNK, - TREMOVE = 122, - RREMOVE, - TSTAT = 124, - RSTAT, - TWSTAT = 126, - RWSTAT, -}; - -/* modes */ -enum { - V9FS_OREAD = 0x00, - V9FS_OWRITE = 0x01, - V9FS_ORDWR = 0x02, - V9FS_OEXEC = 0x03, - V9FS_OEXCL = 0x04, - V9FS_OTRUNC = 0x10, - V9FS_OREXEC = 0x20, - V9FS_ORCLOSE = 0x40, - V9FS_OAPPEND = 0x80, -}; - -/* permissions */ -enum { - V9FS_DMDIR = 0x80000000, - V9FS_DMAPPEND = 0x40000000, - V9FS_DMEXCL = 0x20000000, - V9FS_DMMOUNT = 0x10000000, - V9FS_DMAUTH = 0x08000000, - V9FS_DMTMP = 0x04000000, - V9FS_DMSYMLINK = 0x02000000, - V9FS_DMLINK = 0x01000000, - /* 9P2000.u extensions */ - V9FS_DMDEVICE = 0x00800000, - V9FS_DMNAMEDPIPE = 0x00200000, - V9FS_DMSOCKET = 0x00100000, - V9FS_DMSETUID = 0x00080000, - V9FS_DMSETGID = 0x00040000, -}; - -/* qid.types */ -enum { - V9FS_QTDIR = 0x80, - V9FS_QTAPPEND = 0x40, - V9FS_QTEXCL = 0x20, - V9FS_QTMOUNT = 0x10, - V9FS_QTAUTH = 0x08, - V9FS_QTTMP = 0x04, - V9FS_QTSYMLINK = 0x02, - V9FS_QTLINK = 0x01, - V9FS_QTFILE = 0x00, -}; - -#define V9FS_NOTAG (u16)(~0) -#define V9FS_NOFID (u32)(~0) -#define V9FS_MAXWELEM 16 - -/* ample room for Twrite/Rread header (iounit) */ -#define V9FS_IOHDRSZ 24 - -struct v9fs_str { - u16 len; - char *str; -}; - -/* qids are the unique ID for a file (like an inode */ -struct v9fs_qid { - u8 type; - u32 version; - u64 path; -}; - -/* Plan 9 file metadata (stat) structure */ -struct v9fs_stat { - u16 size; - u16 type; - u32 dev; - struct v9fs_qid qid; - u32 mode; - u32 atime; - u32 mtime; - u64 length; - struct v9fs_str name; - struct v9fs_str uid; - struct v9fs_str gid; - struct v9fs_str muid; - struct v9fs_str extension; /* 9p2000.u extensions */ - u32 n_uid; /* 9p2000.u extensions */ - u32 n_gid; /* 9p2000.u extensions */ - u32 n_muid; /* 9p2000.u extensions */ -}; - -/* file metadata (stat) structure used to create Twstat message - The is similar to v9fs_stat, but the strings don't point to - the same memory block and should be freed separately -*/ -struct v9fs_wstat { - u16 size; - u16 type; - u32 dev; - struct v9fs_qid qid; - u32 mode; - u32 atime; - u32 mtime; - u64 length; - char *name; - char *uid; - char *gid; - char *muid; - char *extension; /* 9p2000.u extensions */ - u32 n_uid; /* 9p2000.u extensions */ - u32 n_gid; /* 9p2000.u extensions */ - u32 n_muid; /* 9p2000.u extensions */ -}; - -/* Structures for Protocol Operations */ - -struct Tversion { - u32 msize; - struct v9fs_str version; -}; - -struct Rversion { - u32 msize; - struct v9fs_str version; -}; - -struct Tauth { - u32 afid; - struct v9fs_str uname; - struct v9fs_str aname; -}; - -struct Rauth { - struct v9fs_qid qid; -}; - -struct Rerror { - struct v9fs_str error; - u32 errno; /* 9p2000.u extension */ -}; - -struct Tflush { - u16 oldtag; -}; - -struct Rflush { -}; - -struct Tattach { - u32 fid; - u32 afid; - struct v9fs_str uname; - struct v9fs_str aname; -}; - -struct Rattach { - struct v9fs_qid qid; -}; - -struct Twalk { - u32 fid; - u32 newfid; - u16 nwname; - struct v9fs_str wnames[16]; -}; - -struct Rwalk { - u16 nwqid; - struct v9fs_qid wqids[16]; -}; - -struct Topen { - u32 fid; - u8 mode; -}; - -struct Ropen { - struct v9fs_qid qid; - u32 iounit; -}; - -struct Tcreate { - u32 fid; - struct v9fs_str name; - u32 perm; - u8 mode; - struct v9fs_str extension; -}; - -struct Rcreate { - struct v9fs_qid qid; - u32 iounit; -}; - -struct Tread { - u32 fid; - u64 offset; - u32 count; -}; - -struct Rread { - u32 count; - u8 *data; -}; - -struct Twrite { - u32 fid; - u64 offset; - u32 count; - u8 *data; -}; - -struct Rwrite { - u32 count; -}; - -struct Tclunk { - u32 fid; -}; - -struct Rclunk { -}; - -struct Tremove { - u32 fid; -}; - -struct Rremove { -}; - -struct Tstat { - u32 fid; -}; - -struct Rstat { - struct v9fs_stat stat; -}; - -struct Twstat { - u32 fid; - struct v9fs_stat stat; -}; - -struct Rwstat { -}; - -/* - * fcall is the primary packet structure - * - */ - -struct v9fs_fcall { - u32 size; - u8 id; - u16 tag; - void *sdata; - - union { - struct Tversion tversion; - struct Rversion rversion; - struct Tauth tauth; - struct Rauth rauth; - struct Rerror rerror; - struct Tflush tflush; - struct Rflush rflush; - struct Tattach tattach; - struct Rattach rattach; - struct Twalk twalk; - struct Rwalk rwalk; - struct Topen topen; - struct Ropen ropen; - struct Tcreate tcreate; - struct Rcreate rcreate; - struct Tread tread; - struct Rread rread; - struct Twrite twrite; - struct Rwrite rwrite; - struct Tclunk tclunk; - struct Rclunk rclunk; - struct Tremove tremove; - struct Rremove rremove; - struct Tstat tstat; - struct Rstat rstat; - struct Twstat twstat; - struct Rwstat rwstat; - } params; -}; - -#define PRINT_FCALL_ERROR(s, fcall) dprintk(DEBUG_ERROR, "%s: %.*s\n", s, \ - fcall?fcall->params.rerror.error.len:0, \ - fcall?fcall->params.rerror.error.str:""); - -int v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize, - char *version, struct v9fs_fcall **rcall); - -int v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname, - u32 fid, u32 afid, struct v9fs_fcall **rcall); - -int v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid); - -int v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, - struct v9fs_fcall **rcall); - -int v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid, - struct v9fs_wstat *wstat, struct v9fs_fcall **rcall); - -int v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid, - char *name, struct v9fs_fcall **rcall); - -int v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode, - struct v9fs_fcall **rcall); - -int v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid, - struct v9fs_fcall **rcall); - -int v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name, - u32 perm, u8 mode, char *extension, struct v9fs_fcall **rcall); - -int v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, - u64 offset, u32 count, struct v9fs_fcall **rcall); - -int v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, - u32 count, const char __user * data, - struct v9fs_fcall **rcall); -int v9fs_printfcall(char *, int, struct v9fs_fcall *, int); diff --git a/fs/9p/Makefile b/fs/9p/Makefile index 87897f8..bc7f0d1 100644 --- a/fs/9p/Makefile +++ b/fs/9p/Makefile @@ -1,18 +1,12 @@ obj-$(CONFIG_9P_FS) := 9p.o 9p-objs := \ - trans_fd.o \ - mux.o \ - fcall.o \ - conv.o \ vfs_super.o \ vfs_inode.o \ vfs_addr.o \ vfs_file.o \ vfs_dir.o \ vfs_dentry.o \ - error.o \ v9fs.o \ fid.o \ - fcprint.o diff --git a/fs/9p/conv.h b/fs/9p/conv.h deleted file mode 100644 index dd5b6b1..0000000 --- a/fs/9p/conv.h +++ /dev/null @@ -1,50 +0,0 @@ -/* - * linux/fs/9p/conv.h - * - * 9P protocol conversion definitions. - * - * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> - * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> - * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to: - * Free Software Foundation - * 51 Franklin Street, Fifth Floor - * Boston, MA 02111-1301 USA - * - */ - -int v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat, - int extended); -int v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall, - int extended); - -void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag); - -struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version); -struct v9fs_fcall *v9fs_create_tattach(u32 fid, u32 afid, char *uname, - char *aname); -struct v9fs_fcall *v9fs_create_tflush(u16 oldtag); -struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname, - char **wnames); -struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode); -struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode, - char *extension, int extended); -struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count); -struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count, - const char __user *data); -struct v9fs_fcall *v9fs_create_tclunk(u32 fid); -struct v9fs_fcall *v9fs_create_tremove(u32 fid); -struct v9fs_fcall *v9fs_create_tstat(u32 fid); -struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat, - int extended); diff --git a/fs/9p/debug.h b/fs/9p/debug.h deleted file mode 100644 index 4228c0b..0000000 --- a/fs/9p/debug.h +++ /dev/null @@ -1,77 +0,0 @@ -/* - * linux/fs/9p/debug.h - V9FS Debug Definitions - * - * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> - * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to: - * Free Software Foundation - * 51 Franklin Street, Fifth Floor - * Boston, MA 02111-1301 USA - * - */ - -#define DEBUG_ERROR (1<<0) -#define DEBUG_CURRENT (1<<1) -#define DEBUG_9P (1<<2) -#define DEBUG_VFS (1<<3) -#define DEBUG_CONV (1<<4) -#define DEBUG_MUX (1<<5) -#define DEBUG_TRANS (1<<6) -#define DEBUG_SLABS (1<<7) -#define DEBUG_FCALL (1<<8) - -#define DEBUG_DUMP_PKT 0 - -extern int v9fs_debug_level; - -#define dprintk(level, format, arg...) \ -do { \ - if((v9fs_debug_level & level)==level) \ - printk(KERN_NOTICE "-- %s (%d): " \ - format , __FUNCTION__, current->pid , ## arg); \ -} while(0) - -#define eprintk(level, format, arg...) \ -do { \ - printk(level "v9fs: %s (%d): " \ - format , __FUNCTION__, current->pid , ## arg); \ -} while(0) - -#if DEBUG_DUMP_PKT -static inline void dump_data(const unsigned char *data, unsigned int datalen) -{ - int i, n; - char buf[5*8]; - - n = 0; - i = 0; - while (i < datalen) { - n += snprintf(buf+n, sizeof(buf)-n, "%02x", data[i++]); - if (i%4 == 0) - n += snprintf(buf+n, sizeof(buf)-n, " "); - - if (i%16 == 0) { - dprintk(DEBUG_ERROR, "%s\n", buf); - n = 0; - } - } - - dprintk(DEBUG_ERROR, "%s\n", buf); -} -#else /* DEBUG_DUMP_PKT */ -static inline void dump_data(const unsigned char *data, unsigned int datalen) -{ - -} -#endif /* DEBUG_DUMP_PKT */ diff --git a/fs/9p/error.c b/fs/9p/error.c deleted file mode 100644 index 0d7fa4e..0000000 --- a/fs/9p/error.c +++ /dev/null @@ -1,93 +0,0 @@ -/* - * linux/fs/9p/error.c - * - * Error string handling - * - * Plan 9 uses error strings, Unix uses error numbers. These functions - * try to help manage that and provide for dynamically adding error - * mappings. - * - * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> - * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to: - * Free Software Foundation - * 51 Franklin Street, Fifth Floor - * Boston, MA 02111-1301 USA - * - */ - -#include <linux/module.h> - -#include <linux/list.h> -#include <linux/jhash.h> - -#include "debug.h" -#include "error.h" - -/** - * v9fs_error_init - preload - * @errstr: error string - * - */ - -int v9fs_error_init(void) -{ - struct errormap *c; - int bucket; - - /* initialize hash table */ - for (bucket = 0; bucket < ERRHASHSZ; bucket++) - INIT_HLIST_HEAD(&hash_errmap[bucket]); - - /* load initial error map into hash table */ - for (c = errmap; c->name != NULL; c++) { - c->namelen = strlen(c->name); - bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ; - INIT_HLIST_NODE(&c->list); - hlist_add_head(&c->list, &hash_errmap[bucket]); - } - - return 1; -} - -/** - * errstr2errno - convert error string to error number - * @errstr: error string - * - */ - -int v9fs_errstr2errno(char *errstr, int len) -{ - int errno = 0; - struct hlist_node *p = NULL; - struct errormap *c = NULL; - int bucket = jhash(errstr, len, 0) % ERRHASHSZ; - - hlist_for_each_entry(c, p, &hash_errmap[bucket], list) { - if (c->namelen==len && !memcmp(c->name, errstr, len)) { - errno = c->val; - break; - } - } - - if (errno == 0) { - /* TODO: if error isn't found, add it dynamically */ - errstr[len] = 0; - printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__, - errstr); - errno = 1; - } - - return -errno; -} diff --git a/fs/9p/fcall.c b/fs/9p/fcall.c deleted file mode 100644 index dc336a6..0000000 --- a/fs/9p/fcall.c +++ /dev/null @@ -1,427 +0,0 @@ -/* - * linux/fs/9p/fcall.c - * - * This file contains functions to perform synchronous 9P calls - * - * Copyright (C) 2004 by Latchesar Ionkov <lucho@ionkov.net> - * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> - * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to: - * Free Software Foundation - * 51 Franklin Street, Fifth Floor - * Boston, MA 02111-1301 USA - * - */ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/fs.h> -#include <linux/sched.h> -#include <linux/idr.h> - -#include "debug.h" -#include "v9fs.h" -#include "9p.h" -#include "conv.h" -#include "mux.h" - -/** - * v9fs_t_version - negotiate protocol parameters with sever - * @v9ses: 9P2000 session information - * @msize: requested max size packet - * @version: requested version.extension string - * @fcall: pointer to response fcall pointer - * - */ - -int -v9fs_t_version(struct v9fs_session_info *v9ses, u32 msize, - char *version, struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc; - - dprintk(DEBUG_9P, "msize: %d version: %s\n", msize, version); - tc = v9fs_create_tversion(msize, version); - - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -/** - * v9fs_t_attach - mount the server - * @v9ses: 9P2000 session information - * @uname: user name doing the attach - * @aname: remote name being attached to - * @fid: mount fid to attatch to root node - * @afid: authentication fid (in this case result key) - * @fcall: pointer to response fcall pointer - * - */ - -int -v9fs_t_attach(struct v9fs_session_info *v9ses, char *uname, char *aname, - u32 fid, u32 afid, struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall* tc; - - dprintk(DEBUG_9P, "uname '%s' aname '%s' fid %d afid %d\n", uname, - aname, fid, afid); - - tc = v9fs_create_tattach(fid, afid, uname, aname); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -static void v9fs_t_clunk_cb(void *a, struct v9fs_fcall *tc, - struct v9fs_fcall *rc, int err) -{ - int fid, id; - struct v9fs_session_info *v9ses; - - id = 0; - fid = tc->params.tclunk.fid; - if (rc) - id = rc->id; - - kfree(tc); - kfree(rc); - if (id == RCLUNK) { - v9ses = a; - v9fs_put_idpool(fid, &v9ses->fidpool); - } -} - -/** - * v9fs_t_clunk - release a fid (finish a transaction) - * @v9ses: 9P2000 session information - * @fid: fid to release - * @fcall: pointer to response fcall pointer - * - */ - -int -v9fs_t_clunk(struct v9fs_session_info *v9ses, u32 fid) -{ - int ret; - struct v9fs_fcall *tc, *rc; - - dprintk(DEBUG_9P, "fid %d\n", fid); - - rc = NULL; - tc = v9fs_create_tclunk(fid); - if (!IS_ERR(tc)) - ret = v9fs_mux_rpc(v9ses->mux, tc, &rc); - else - ret = PTR_ERR(tc); - - if (ret) - dprintk(DEBUG_ERROR, "failed fid %d err %d\n", fid, ret); - - v9fs_t_clunk_cb(v9ses, tc, rc, ret); - return ret; -} - -#if 0 -/** - * v9fs_v9fs_t_flush - flush a pending transaction - * @v9ses: 9P2000 session information - * @tag: tag to release - * - */ -int v9fs_t_flush(struct v9fs_session_info *v9ses, u16 oldtag) -{ - int ret; - struct v9fs_fcall *tc; - - dprintk(DEBUG_9P, "oldtag %d\n", oldtag); - - tc = v9fs_create_tflush(oldtag); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, NULL); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} -#endif - -/** - * v9fs_t_stat - read a file's meta-data - * @v9ses: 9P2000 session information - * @fid: fid pointing to file or directory to get info about - * @fcall: pointer to response fcall - * - */ - -int -v9fs_t_stat(struct v9fs_session_info *v9ses, u32 fid, struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc; - - dprintk(DEBUG_9P, "fid %d\n", fid); - - ret = -ENOMEM; - tc = v9fs_create_tstat(fid); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -/** - * v9fs_t_wstat - write a file's meta-data - * @v9ses: 9P2000 session information - * @fid: fid pointing to file or directory to write info about - * @stat: metadata - * @fcall: pointer to response fcall - * - */ - -int -v9fs_t_wstat(struct v9fs_session_info *v9ses, u32 fid, - struct v9fs_wstat *wstat, struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc; - - dprintk(DEBUG_9P, "fid %d\n", fid); - - tc = v9fs_create_twstat(fid, wstat, v9ses->extended); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -/** - * v9fs_t_walk - walk a fid to a new file or directory - * @v9ses: 9P2000 session information - * @fid: fid to walk - * @newfid: new fid (for clone operations) - * @name: path to walk fid to - * @fcall: pointer to response fcall - * - */ - -/* TODO: support multiple walk */ - -int -v9fs_t_walk(struct v9fs_session_info *v9ses, u32 fid, u32 newfid, - char *name, struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc; - int nwname; - - dprintk(DEBUG_9P, "fid %d newfid %d wname '%s'\n", fid, newfid, name); - - if (name) - nwname = 1; - else - nwname = 0; - - tc = v9fs_create_twalk(fid, newfid, nwname, &name); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -/** - * v9fs_t_open - open a file - * - * @v9ses - 9P2000 session information - * @fid - fid to open - * @mode - mode to open file (R, RW, etc) - * @fcall - pointer to response fcall - * - */ - -int -v9fs_t_open(struct v9fs_session_info *v9ses, u32 fid, u8 mode, - struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc; - - dprintk(DEBUG_9P, "fid %d mode %d\n", fid, mode); - - tc = v9fs_create_topen(fid, mode); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -/** - * v9fs_t_remove - remove a file or directory - * @v9ses: 9P2000 session information - * @fid: fid to remove - * @fcall: pointer to response fcall - * - */ - -int -v9fs_t_remove(struct v9fs_session_info *v9ses, u32 fid, - struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc; - - dprintk(DEBUG_9P, "fid %d\n", fid); - - tc = v9fs_create_tremove(fid); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -/** - * v9fs_t_create - create a file or directory - * @v9ses: 9P2000 session information - * @fid: fid to create - * @name: name of the file or directory to create - * @perm: permissions to create with - * @mode: mode to open file (R, RW, etc) - * @fcall: pointer to response fcall - * - */ - -int -v9fs_t_create(struct v9fs_session_info *v9ses, u32 fid, char *name, u32 perm, - u8 mode, char *extension, struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc; - - dprintk(DEBUG_9P, "fid %d name '%s' perm %x mode %d\n", - fid, name, perm, mode); - - tc = v9fs_create_tcreate(fid, name, perm, mode, extension, - v9ses->extended); - - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, rcp); - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -/** - * v9fs_t_read - read data - * @v9ses: 9P2000 session information - * @fid: fid to read from - * @offset: offset to start read at - * @count: how many bytes to read - * @fcall: pointer to response fcall (with data) - * - */ - -int -v9fs_t_read(struct v9fs_session_info *v9ses, u32 fid, u64 offset, - u32 count, struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc, *rc; - - dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid, - (long long unsigned) offset, count); - - tc = v9fs_create_tread(fid, offset, count); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, &rc); - if (!ret) - ret = rc->params.rread.count; - if (rcp) - *rcp = rc; - else - kfree(rc); - - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - -/** - * v9fs_t_write - write data - * @v9ses: 9P2000 session information - * @fid: fid to write to - * @offset: offset to start write at - * @count: how many bytes to write - * @fcall: pointer to response fcall - * - */ - -int -v9fs_t_write(struct v9fs_session_info *v9ses, u32 fid, u64 offset, u32 count, - const char __user *data, struct v9fs_fcall **rcp) -{ - int ret; - struct v9fs_fcall *tc, *rc; - - dprintk(DEBUG_9P, "fid %d offset 0x%llux count 0x%x\n", fid, - (long long unsigned) offset, count); - - tc = v9fs_create_twrite(fid, offset, count, data); - if (!IS_ERR(tc)) { - ret = v9fs_mux_rpc(v9ses->mux, tc, &rc); - - if (!ret) - ret = rc->params.rwrite.count; - if (rcp) - *rcp = rc; - else - kfree(rc); - - kfree(tc); - } else - ret = PTR_ERR(tc); - - return ret; -} - diff --git a/fs/9p/fid.c b/fs/9p/fid.c index 9041971..08fa320 100644 --- a/fs/9p/fid.c +++ b/fs/9p/fid.c @@ -26,10 +26,10 @@ #include <linux/sched.h> #include <linux/idr.h> #include <asm/semaphore.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> -#include "debug.h" #include "v9fs.h" -#include "9p.h" #include "v9fs_vfs.h" #include "fid.h" @@ -40,67 +40,29 @@ * */ -int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry) +int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid) { - struct list_head *fid_list = (struct list_head *)dentry->d_fsdata; - dprintk(DEBUG_9P, "fid %d (%p) dentry %s (%p)\n", fid->fid, fid, - dentry->d_iname, dentry); - if (dentry->d_fsdata == NULL) { - dentry->d_fsdata = - kmalloc(sizeof(struct list_head), GFP_KERNEL); - if (dentry->d_fsdata == NULL) { - dprintk(DEBUG_ERROR, "Out of memory\n"); - return -ENOMEM; - } - fid_list = (struct list_head *)dentry->d_fsdata; - INIT_LIST_HEAD(fid_list); /* Initialize list head */ - } + struct v9fs_dentry *dent; - fid->uid = current->uid; - list_add(&fid->list, fid_list); - return 0; -} + P9_DPRINTK(P9_DEBUG_VFS, "fid %d dentry %s\n", + fid->fid, dentry->d_iname); -/** - * v9fs_fid_create - allocate a FID structure - * @dentry - dentry to link newly created fid to - * - */ - -struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *v9ses, int fid) -{ - struct v9fs_fid *new; + dent = dentry->d_fsdata; + if (!dent) { + dent = kmalloc(sizeof(struct v9fs_dentry), GFP_KERNEL); + if (!dent) + return -ENOMEM; - dprintk(DEBUG_9P, "fid create fid %d\n", fid); - new = kmalloc(sizeof(struct v9fs_fid), GFP_KERNEL); - if (new == NULL) { - dprintk(DEBUG_ERROR, "Out of Memory\n"); - return ERR_PTR(-ENOMEM); + spin_lock_init(&dent->lock); + INIT_LIST_HEAD(&dent->fidlist); + dentry->d_fsdata = dent; } - new->fid = fid; - new->v9ses = v9ses; - new->fidopen = 0; - new->fidclunked = 0; - new->iounit = 0; - new->rdir_pos = 0; - new->rdir_fcall = NULL; - init_MUTEX(&new->lock); - INIT_LIST_HEAD(&new->list); - - return new; -} - -/** - * v9fs_fid_destroy - deallocate a FID structure - * @fid: fid to destroy - * - */ + spin_lock(&dent->lock); + list_add(&fid->dlist, &dent->fidlist); + spin_unlock(&dent->lock); -void v9fs_fid_destroy(struct v9fs_fid *fid) -{ - list_del(&fid->list); - kfree(fid); + return 0; } /** @@ -114,30 +76,42 @@ void v9fs_fid_destroy(struct v9fs_fid *fid) * */ -struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry) +struct p9_fid *v9fs_fid_lookup(struct dentry *dentry) { - struct list_head *fid_list = (struct list_head *)dentry->d_fsdata; - struct v9fs_fid *return_fid = NULL; - - dprintk(DEBUG_9P, " dentry: %s (%p)\n", dentry->d_iname, dentry); - - if (fid_list) - return_fid = list_entry(fid_list->next, struct v9fs_fid, list); + struct v9fs_dentry *dent; + struct p9_fid *fid; + + P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); + dent = dentry->d_fsdata; + if (dent) + fid = list_entry(dent->fidlist.next, struct p9_fid, dlist); + else + fid = ERR_PTR(-EBADF); + + P9_DPRINTK(P9_DEBUG_VFS, " fid: %p\n", fid); + return fid; +} - if (!return_fid) { - dprintk(DEBUG_ERROR, "Couldn't find a fid in dentry\n"); - return_fid = ERR_PTR(-EBADF); +struct p9_fid *v9fs_fid_lookup_remove(struct dentry *dentry) +{ + struct p9_fid *fid; + struct v9fs_dentry *dent; + + dent = dentry->d_fsdata; + fid = v9fs_fid_lookup(dentry); + if (!IS_ERR(fid)) { + spin_lock(&dent->lock); + list_del(&fid->dlist); + spin_unlock(&dent->lock); } - if(down_interruptible(&return_fid->lock)) - return ERR_PTR(-EINTR); - - return return_fid; + return fid; } + /** * v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and - * release it + * release it * @dentry: dentry to look for fid in * * find a fid in the dentry and then clone to a new private fid @@ -146,49 +120,15 @@ struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry) * */ -struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry) +struct p9_fid *v9fs_fid_clone(struct dentry *dentry) { - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); - struct v9fs_fid *base_fid, *new_fid = ERR_PTR(-EBADF); - struct v9fs_fcall *fcall = NULL; - int fid, err; - - base_fid = v9fs_fid_lookup(dentry); - - if(IS_ERR(base_fid)) - return base_fid; - - if(base_fid) { /* clone fid */ - fid = v9fs_get_idpool(&v9ses->fidpool); - if (fid < 0) { - eprintk(KERN_WARNING, "newfid fails!\n"); - new_fid = ERR_PTR(-ENOSPC); - goto Release_Fid; - } - - err = v9fs_t_walk(v9ses, base_fid->fid, fid, NULL, &fcall); - if (err < 0) { - dprintk(DEBUG_ERROR, "clone walk didn't work\n"); - v9fs_put_idpool(fid, &v9ses->fidpool); - new_fid = ERR_PTR(err); - goto Free_Fcall; - } - new_fid = v9fs_fid_create(v9ses, fid); - if (new_fid == NULL) { - dprintk(DEBUG_ERROR, "out of memory\n"); - new_fid = ERR_PTR(-ENOMEM); - } -Free_Fcall: - kfree(fcall); - } + struct p9_fid *ofid, *fid; -Release_Fid: - up(&base_fid->lock); - return new_fid; -} + P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); + ofid = v9fs_fid_lookup(dentry); + if (IS_ERR(ofid)) + return ofid; -void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid) -{ - v9fs_t_clunk(v9ses, fid->fid); - v9fs_fid_destroy(fid); + fid = p9_client_walk(ofid, 0, NULL, 1); + return fid; } diff --git a/fs/9p/fid.h b/fs/9p/fid.h index 48fc170..47a0ba7 100644 --- a/fs/9p/fid.h +++ b/fs/9p/fid.h @@ -22,41 +22,12 @@ #include <linux/list.h> -#define FID_OP 0 -#define FID_WALK 1 -#define FID_CREATE 2 - -struct v9fs_fid { - struct list_head list; /* list of fids associated with a dentry */ - struct list_head active; /* XXX - debug */ - - struct semaphore lock; - - u32 fid; - unsigned char fidopen; /* set when fid is opened */ - unsigned char fidclunked; /* set when fid has already been clunked */ - - struct v9fs_qid qid; - u32 iounit; - - /* readdir stuff */ - int rdir_fpos; - loff_t rdir_pos; - struct v9fs_fcall *rdir_fcall; - - /* management stuff */ - uid_t uid; /* user associated with this fid */ - - /* private data */ - struct file *filp; /* backpointer to File struct for open files */ - struct v9fs_session_info *v9ses; /* session info for this FID */ +struct v9fs_dentry { + spinlock_t lock; /* protect fidlist */ + struct list_head fidlist; }; -struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry); -struct v9fs_fid *v9fs_fid_get_created(struct dentry *); -void v9fs_fid_destroy(struct v9fs_fid *fid); -struct v9fs_fid *v9fs_fid_create(struct v9fs_session_info *, int fid); -int v9fs_fid_insert(struct v9fs_fid *fid, struct dentry *dentry); -struct v9fs_fid *v9fs_fid_clone(struct dentry *dentry); -void v9fs_fid_clunk(struct v9fs_session_info *v9ses, struct v9fs_fid *fid); - +struct p9_fid *v9fs_fid_lookup(struct dentry *dentry); +struct p9_fid *v9fs_fid_lookup_remove(struct dentry *dentry); +struct p9_fid *v9fs_fid_clone(struct dentry *dentry); +int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid); diff --git a/fs/9p/trans_fd.c b/fs/9p/trans_fd.c deleted file mode 100644 index 34d4335..0000000 --- a/fs/9p/trans_fd.c +++ /dev/null @@ -1,308 +0,0 @@ -/* - * linux/fs/9p/trans_fd.c - * - * Fd transport layer. Includes deprecated socket layer. - * - * Copyright (C) 2006 by Russ Cox <rsc@swtch.com> - * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net> - * Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com> - * Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to: - * Free Software Foundation - * 51 Franklin Street, Fifth Floor - * Boston, MA 02111-1301 USA - * - */ - -#include <linux/in.h> -#include <linux/module.h> -#include <linux/net.h> -#include <linux/ipv6.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/un.h> -#include <asm/uaccess.h> -#include <linux/inet.h> -#include <linux/idr.h> -#include <linux/file.h> - -#include "debug.h" -#include "v9fs.h" -#include "transport.h" - -#define V9FS_PORT 564 - -struct v9fs_trans_fd { - struct file *rd; - struct file *wr; -}; - -/** - * v9fs_fd_read- read from a fd - * @v9ses: session information - * @v: buffer to receive data into - * @len: size of receive buffer - * - */ -static int v9fs_fd_read(struct v9fs_transport *trans, void *v, int len) -{ - int ret; - struct v9fs_trans_fd *ts; - - if (!trans || trans->status == Disconnected || !(ts = trans->priv)) - return -EREMOTEIO; - - if (!(ts->rd->f_flags & O_NONBLOCK)) - dprintk(DEBUG_ERROR, "blocking read ...\n"); - - ret = kernel_read(ts->rd, ts->rd->f_pos, v, len); - if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN) - trans->status = Disconnected; - return ret; -} - -/** - * v9fs_fd_write - write to a socket - * @v9ses: session information - * @v: buffer to send data from - * @len: size of send buffer - * - */ -static int v9fs_fd_write(struct v9fs_transport *trans, void *v, int len) -{ - int ret; - mm_segment_t oldfs; - struct v9fs_trans_fd *ts; - - if (!trans || trans->status == Disconnected || !(ts = trans->priv)) - return -EREMOTEIO; - - if (!(ts->wr->f_flags & O_NONBLOCK)) - dprintk(DEBUG_ERROR, "blocking write ...\n"); - - oldfs = get_fs(); - set_fs(get_ds()); - /* The cast to a user pointer is valid due to the set_fs() */ - ret = vfs_write(ts->wr, (void __user *)v, len, &ts->wr->f_pos); - set_fs(oldfs); - - if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN) - trans->status = Disconnected; - return ret; -} - -static unsigned int -v9fs_fd_poll(struct v9fs_transport *trans, struct poll_table_struct *pt) -{ - int ret, n; - struct v9fs_trans_fd *ts; - mm_segment_t oldfs; - - if (!trans || trans->status != Connected || !(ts = trans->priv)) - return -EREMOTEIO; - - if (!ts->rd->f_op || !ts->rd->f_op->poll) - return -EIO; - - if (!ts->wr->f_op || !ts->wr->f_op->poll) - return -EIO; - - oldfs = get_fs(); - set_fs(get_ds()); - - ret = ts->rd->f_op->poll(ts->rd, pt); - if (ret < 0) - goto end; - - if (ts->rd != ts->wr) { - n = ts->wr->f_op->poll(ts->wr, pt); - if (n < 0) { - ret = n; - goto end; - } - ret = (ret & ~POLLOUT) | (n & ~POLLIN); - } - - end: - set_fs(oldfs); - return ret; -} - -static int v9fs_fd_open(struct v9fs_session_info *v9ses, int rfd, int wfd) -{ - struct v9fs_transport *trans = v9ses->transport; - struct v9fs_trans_fd *ts = kmalloc(sizeof(struct v9fs_trans_fd), - GFP_KERNEL); - if (!ts) - return -ENOMEM; - - ts->rd = fget(rfd); - ts->wr = fget(wfd); - if (!ts->rd || !ts->wr) { - if (ts->rd) - fput(ts->rd); - if (ts->wr) - fput(ts->wr); - kfree(ts); - return -EIO; - } - - trans->priv = ts; - trans->status = Connected; - - return 0; -} - -static int v9fs_fd_init(struct v9fs_session_info *v9ses, const char *addr, - char *data) -{ - if (v9ses->rfdno == ~0 || v9ses->wfdno == ~0) { - printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n"); - return -ENOPROTOOPT; - } - - return v9fs_fd_open(v9ses, v9ses->rfdno, v9ses->wfdno); -} - -static int v9fs_socket_open(struct v9fs_session_info *v9ses, - struct socket *csocket) -{ - int fd, ret; - - csocket->sk->sk_allocation = GFP_NOIO; - if ((fd = sock_map_fd(csocket)) < 0) { - eprintk(KERN_ERR, "v9fs_socket_open: failed to map fd\n"); - ret = fd; - release_csocket: - sock_release(csocket); - return ret; - } - - if ((ret = v9fs_fd_open(v9ses, fd, fd)) < 0) { - sockfd_put(csocket); - eprintk(KERN_ERR, "v9fs_socket_open: failed to open fd\n"); - goto release_csocket; - } - - ((struct v9fs_trans_fd *)v9ses->transport->priv)->rd->f_flags |= - O_NONBLOCK; - return 0; -} - -static int v9fs_tcp_init(struct v9fs_session_info *v9ses, const char *addr, - char *data) -{ - int ret; - struct socket *csocket = NULL; - struct sockaddr_in sin_server; - - sin_server.sin_family = AF_INET; - sin_server.sin_addr.s_addr = in_aton(addr); - sin_server.sin_port = htons(v9ses->port); - sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket); - - if (!csocket) { - eprintk(KERN_ERR, "v9fs_trans_tcp: problem creating socket\n"); - return -1; - } - - ret = csocket->ops->connect(csocket, - (struct sockaddr *)&sin_server, - sizeof(struct sockaddr_in), 0); - if (ret < 0) { - eprintk(KERN_ERR, - "v9fs_trans_tcp: problem connecting socket to %s\n", - addr); - return ret; - } - - return v9fs_socket_open(v9ses, csocket); -} - -static int -v9fs_unix_init(struct v9fs_session_info *v9ses, const char *addr, char *data) -{ - int ret; - struct socket *csocket; - struct sockaddr_un sun_server; - - if (strlen(addr) > UNIX_PATH_MAX) { - eprintk(KERN_ERR, "v9fs_trans_unix: address too long: %s\n", - addr); - return -ENAMETOOLONG; - } - - sun_server.sun_family = PF_UNIX; - strcpy(sun_server.sun_path, addr); - sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket); - ret = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server, - sizeof(struct sockaddr_un) - 1, 0); - if (ret < 0) { - eprintk(KERN_ERR, - "v9fs_trans_unix: problem connecting socket: %s: %d\n", - addr, ret); - return ret; - } - - return v9fs_socket_open(v9ses, csocket); -} - -/** - * v9fs_sock_close - shutdown socket - * @trans: private socket structure - * - */ -static void v9fs_fd_close(struct v9fs_transport *trans) -{ - struct v9fs_trans_fd *ts; - - if (!trans) - return; - - ts = xchg(&trans->priv, NULL); - - if (!ts) - return; - - trans->status = Disconnected; - if (ts->rd) - fput(ts->rd); - if (ts->wr) - fput(ts->wr); - kfree(ts); -} - -struct v9fs_transport v9fs_trans_fd = { - .init = v9fs_fd_init, - .write = v9fs_fd_write, - .read = v9fs_fd_read, - .close = v9fs_fd_close, - .poll = v9fs_fd_poll, -}; - -struct v9fs_transport v9fs_trans_tcp = { - .init = v9fs_tcp_init, - .write = v9fs_fd_write, - .read = v9fs_fd_read, - .close = v9fs_fd_close, - .poll = v9fs_fd_poll, -}; - -struct v9fs_transport v9fs_trans_unix = { - .init = v9fs_unix_init, - .write = v9fs_fd_write, - .read = v9fs_fd_read, - .close = v9fs_fd_close, - .poll = v9fs_fd_poll, -}; diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index 6ad6f19..4feb5ae 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -29,16 +29,12 @@ #include <linux/sched.h> #include <linux/parser.h> #include <linux/idr.h> - -#include "debug.h" +#include <net/9p/9p.h> +#include <net/9p/transport.h> +#include <net/9p/conn.h> +#include <net/9p/client.h> #include "v9fs.h" -#include "9p.h" #include "v9fs_vfs.h" -#include "transport.h" -#include "mux.h" - -/* TODO: sysfs or debugfs interface */ -int v9fs_debug_level = 0; /* feature-rific global debug level */ /* * Option Parsing (code inspired by NFS code) @@ -47,12 +43,12 @@ int v9fs_debug_level = 0; /* feature-rific global debug level */ enum { /* Options that take integer arguments */ - Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid, Opt_debug, + Opt_port, Opt_msize, Opt_uid, Opt_gid, Opt_afid, Opt_rfdno, Opt_wfdno, /* String options */ Opt_uname, Opt_remotename, /* Options that take no arguments */ - Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd, + Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd, Opt_pci, /* Cache options */ Opt_cache_loose, /* Error token */ @@ -67,12 +63,14 @@ static match_table_t tokens = { {Opt_afid, "afid=%u"}, {Opt_rfdno, "rfdno=%u"}, {Opt_wfdno, "wfdno=%u"}, - {Opt_debug, "debug=%x"}, {Opt_uname, "uname=%s"}, {Opt_remotename, "aname=%s"}, {Opt_unix, "proto=unix"}, {Opt_tcp, "proto=tcp"}, {Opt_fd, "proto=fd"}, +#ifdef CONFIG_PCI_9P + {Opt_pci, "proto=pci"}, +#endif {Opt_tcp, "tcp"}, {Opt_unix, "unix"}, {Opt_fd, "fd"}, @@ -83,6 +81,8 @@ static match_table_t tokens = { {Opt_err, NULL} }; +extern struct p9_transport *p9pci_trans_create(void); + /* * Parse option string. */ @@ -122,7 +122,7 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses) token = match_token(p, tokens, args); if (token < Opt_uname) { if ((ret = match_int(&args[0], &option)) < 0) { - dprintk(DEBUG_ERROR, + P9_DPRINTK(P9_DEBUG_ERROR, "integer field, but no integer?\n"); continue; } @@ -149,15 +149,15 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses) case Opt_wfdno: v9ses->wfdno = option; break; - case Opt_debug: - v9ses->debug = option; - break; case Opt_tcp: v9ses->proto = PROTO_TCP; break; case Opt_unix: v9ses->proto = PROTO_UNIX; break; + case Opt_pci: + v9ses->proto = PROTO_PCI; + break; case Opt_fd: v9ses->proto = PROTO_FD; break; @@ -183,82 +183,6 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses) } /** - * v9fs_inode2v9ses - safely extract v9fs session info from super block - * @inode: inode to extract information from - * - * Paranoid function to extract v9ses information from superblock, - * if anything is missing it will report an error. - * - */ - -struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode) -{ - return (inode->i_sb->s_fs_info); -} - -/** - * v9fs_get_idpool - allocate numeric id from pool - * @p - pool to allocate from - * - * XXX - This seems to be an awful generic function, should it be in idr.c with - * the lock included in struct idr? - */ - -int v9fs_get_idpool(struct v9fs_idpool *p) -{ - int i = 0; - int error; - -retry: - if (idr_pre_get(&p->pool, GFP_KERNEL) == 0) - return 0; - - if (down_interruptible(&p->lock) == -EINTR) { - eprintk(KERN_WARNING, "Interrupted while locking\n"); - return -1; - } - - /* no need to store exactly p, we just need something non-null */ - error = idr_get_new(&p->pool, p, &i); - up(&p->lock); - - if (error == -EAGAIN) - goto retry; - else if (error) - return -1; - - return i; -} - -/** - * v9fs_put_idpool - release numeric id from pool - * @p - pool to allocate from - * - * XXX - This seems to be an awful generic function, should it be in idr.c with - * the lock included in struct idr? - */ - -void v9fs_put_idpool(int id, struct v9fs_idpool *p) -{ - if (down_interruptible(&p->lock) == -EINTR) { - eprintk(KERN_WARNING, "Interrupted while locking\n"); - return; - } - idr_remove(&p->pool, id); - up(&p->lock); -} - -/** - * v9fs_check_idpool - check if the specified id is available - * @id - id to check - * @p - pool - */ -int v9fs_check_idpool(int id, struct v9fs_idpool *p) -{ - return idr_find(&p->pool, id) != NULL; -} - -/** * v9fs_session_init - initialize session * @v9ses: session information structure * @dev_name: device being mounted @@ -266,25 +190,21 @@ int v9fs_check_idpool(int id, struct v9fs_idpool *p) * */ -int -v9fs_session_init(struct v9fs_session_info *v9ses, +struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, const char *dev_name, char *data) { - struct v9fs_fcall *fcall = NULL; - struct v9fs_transport *trans_proto; - int n = 0; - int newfid = -1; int retval = -EINVAL; - struct v9fs_str *version; + struct p9_transport *trans; + struct p9_fid *fid; v9ses->name = __getname(); if (!v9ses->name) - return -ENOMEM; + return ERR_PTR(-ENOMEM); v9ses->remotename = __getname(); if (!v9ses->remotename) { __putname(v9ses->name); - return -ENOMEM; + return ERR_PTR(-ENOMEM); } strcpy(v9ses->name, V9FS_DEFUSER); @@ -292,130 +212,60 @@ v9fs_session_init(struct v9fs_session_info *v9ses, v9fs_parse_options(data, v9ses); - /* set global debug level */ - v9fs_debug_level = v9ses->debug; - - /* id pools that are session-dependent: fids and tags */ - idr_init(&v9ses->fidpool.pool); - init_MUTEX(&v9ses->fidpool.lock); - switch (v9ses->proto) { case PROTO_TCP: - trans_proto = &v9fs_trans_tcp; + trans = p9_trans_create_tcp(dev_name, v9ses->port); break; case PROTO_UNIX: - trans_proto = &v9fs_trans_unix; + trans = p9_trans_create_unix(dev_name); *v9ses->remotename = 0; break; case PROTO_FD: - trans_proto = &v9fs_trans_fd; + trans = p9_trans_create_fd(v9ses->rfdno, v9ses->wfdno); + *v9ses->remotename = 0; + break; +#ifdef CONFIG_PCI_9P + case PROTO_PCI: + trans = p9pci_trans_create(); *v9ses->remotename = 0; break; +#endif default: printk(KERN_ERR "v9fs: Bad mount protocol %d\n", v9ses->proto); retval = -ENOPROTOOPT; - goto SessCleanUp; + goto error; }; - v9ses->transport = kmalloc(sizeof(*v9ses->transport), GFP_KERNEL); - if (!v9ses->transport) { - retval = -ENOMEM; - goto SessCleanUp; + if (IS_ERR(trans)) { + retval = PTR_ERR(trans); + trans = NULL; + goto error; } - memmove(v9ses->transport, trans_proto, sizeof(*v9ses->transport)); + v9ses->clnt = p9_client_create(trans, v9ses->maxdata + P9_IOHDRSZ, + v9ses->extended); - if ((retval = v9ses->transport->init(v9ses, dev_name, data)) < 0) { - eprintk(KERN_ERR, "problem initializing transport\n"); - goto SessCleanUp; + if (IS_ERR(v9ses->clnt)) { + retval = PTR_ERR(v9ses->clnt); + v9ses->clnt = NULL; + P9_DPRINTK(P9_DEBUG_ERROR, "problem initializing 9p client\n"); + goto error; } - v9ses->inprogress = 0; - v9ses->shutdown = 0; - v9ses->session_hung = 0; - - v9ses->mux = v9fs_mux_init(v9ses->transport, v9ses->maxdata + V9FS_IOHDRSZ, - &v9ses->extended); - - if (IS_ERR(v9ses->mux)) { - retval = PTR_ERR(v9ses->mux); - v9ses->mux = NULL; - dprintk(DEBUG_ERROR, "problem initializing mux\n"); - goto SessCleanUp; + fid = p9_client_attach(v9ses->clnt, NULL, v9ses->name, + v9ses->remotename); + if (IS_ERR(fid)) { + retval = PTR_ERR(fid); + fid = NULL; + P9_DPRINTK(P9_DEBUG_ERROR, "cannot attach\n"); + goto error; } - if (v9ses->afid == ~0) { - if (v9ses->extended) - retval = - v9fs_t_version(v9ses, v9ses->maxdata, "9P2000.u", - &fcall); - else - retval = v9fs_t_version(v9ses, v9ses->maxdata, "9P2000", - &fcall); - - if (retval < 0) { - dprintk(DEBUG_ERROR, "v9fs_t_version failed\n"); - goto FreeFcall; - } - - version = &fcall->params.rversion.version; - if (version->len==8 && !memcmp(version->str, "9P2000.u", 8)) { - dprintk(DEBUG_9P, "9P2000 UNIX extensions enabled\n"); - v9ses->extended = 1; - } else if (version->len==6 && !memcmp(version->str, "9P2000", 6)) { - dprintk(DEBUG_9P, "9P2000 legacy mode enabled\n"); - v9ses->extended = 0; - } else { - retval = -EREMOTEIO; - goto FreeFcall; - } + return fid; - n = fcall->params.rversion.msize; - kfree(fcall); - - if (n < v9ses->maxdata) - v9ses->maxdata = n; - } - - newfid = v9fs_get_idpool(&v9ses->fidpool); - if (newfid < 0) { - eprintk(KERN_WARNING, "couldn't allocate FID\n"); - retval = -ENOMEM; - goto SessCleanUp; - } - /* it is a little bit ugly, but we have to prevent newfid */ - /* being the same as afid, so if it is, get a new fid */ - if (v9ses->afid != ~0 && newfid == v9ses->afid) { - newfid = v9fs_get_idpool(&v9ses->fidpool); - if (newfid < 0) { - eprintk(KERN_WARNING, "couldn't allocate FID\n"); - retval = -ENOMEM; - goto SessCleanUp; - } - } - - if ((retval = - v9fs_t_attach(v9ses, v9ses->name, v9ses->remotename, newfid, - v9ses->afid, NULL)) - < 0) { - dprintk(DEBUG_ERROR, "cannot attach\n"); - goto SessCleanUp; - } - - if (v9ses->afid != ~0) { - dprintk(DEBUG_ERROR, "afid not equal to ~0\n"); - if (v9fs_t_clunk(v9ses, v9ses->afid)) - dprintk(DEBUG_ERROR, "clunk failed\n"); - } - - return newfid; - - FreeFcall: - kfree(fcall); - - SessCleanUp: +error: v9fs_session_close(v9ses); - return retval; + return ERR_PTR(retval); } /** @@ -426,15 +276,9 @@ v9fs_session_init(struct v9fs_session_info *v9ses, void v9fs_session_close(struct v9fs_session_info *v9ses) { - if (v9ses->mux) { - v9fs_mux_destroy(v9ses->mux); - v9ses->mux = NULL; - } - - if (v9ses->transport) { - v9ses->transport->close(v9ses->transport); - kfree(v9ses->transport); - v9ses->transport = NULL; + if (v9ses->clnt) { + p9_client_destroy(v9ses->clnt); + v9ses->clnt = NULL; } __putname(v9ses->name); @@ -446,9 +290,8 @@ void v9fs_session_close(struct v9fs_session_info *v9ses) * and cancel all pending requests. */ void v9fs_session_cancel(struct v9fs_session_info *v9ses) { - dprintk(DEBUG_ERROR, "cancel session %p\n", v9ses); - v9ses->transport->status = Disconnected; - v9fs_mux_cancel(v9ses->mux, -EIO); + P9_DPRINTK(P9_DEBUG_ERROR, "cancel session %p\n", v9ses); + p9_client_disconnect(v9ses->clnt); } extern int v9fs_error_init(void); @@ -460,24 +303,9 @@ extern int v9fs_error_init(void); static int __init init_v9fs(void) { - int ret; - - v9fs_error_init(); - printk(KERN_INFO "Installing v9fs 9p2000 file system support\n"); - ret = v9fs_mux_global_init(); - if (ret) { - printk(KERN_WARNING "v9fs: starting mux failed\n"); - return ret; - } - ret = register_filesystem(&v9fs_fs_type); - if (ret) { - printk(KERN_WARNING "v9fs: registering file system failed\n"); - v9fs_mux_global_exit(); - } - - return ret; + return register_filesystem(&v9fs_fs_type); } /** @@ -487,13 +315,13 @@ static int __init init_v9fs(void) static void __exit exit_v9fs(void) { - v9fs_mux_global_exit(); unregister_filesystem(&v9fs_fs_type); } module_init(init_v9fs) module_exit(exit_v9fs) +MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>"); MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>"); MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>"); MODULE_LICENSE("GPL"); diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index 820bf5c..abc4b16 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -22,16 +22,6 @@ */ /* - * Idpool structure provides lock and id management - * - */ - -struct v9fs_idpool { - struct semaphore lock; - struct idr pool; -}; - -/* * Session structure provides information for an opened session * */ @@ -54,15 +44,7 @@ struct v9fs_session_info { unsigned int uid; /* default uid/muid for legacy support */ unsigned int gid; /* default gid for legacy support */ - /* book keeping */ - struct v9fs_idpool fidpool; /* The FID pool for file descriptors */ - - struct v9fs_transport *transport; - struct v9fs_mux_data *mux; - - int inprogress; /* session in progress => true */ - int shutdown; /* session shutting down. no more attaches. */ - unsigned char session_hung; + struct p9_client *clnt; /* 9p client */ struct dentry *debugfs_dir; }; @@ -71,6 +53,7 @@ enum { PROTO_TCP, PROTO_UNIX, PROTO_FD, + PROTO_PCI, }; /* possible values of ->cache */ @@ -82,12 +65,9 @@ enum { extern struct dentry *v9fs_debugfs_root; -int v9fs_session_init(struct v9fs_session_info *, const char *, char *); -struct v9fs_session_info *v9fs_inode2v9ses(struct inode *); +struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *, + char *); void v9fs_session_close(struct v9fs_session_info *v9ses); -int v9fs_get_idpool(struct v9fs_idpool *p); -void v9fs_put_idpool(int id, struct v9fs_idpool *p); -int v9fs_check_idpool(int id, struct v9fs_idpool *p); void v9fs_session_cancel(struct v9fs_session_info *v9ses); #define V9FS_MAGIC 0x01021997 @@ -97,3 +77,7 @@ void v9fs_session_cancel(struct v9fs_session_info *v9ses); #define V9FS_DEFUSER "nobody" #define V9FS_DEFANAME "" +static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode) +{ + return (inode->i_sb->s_fs_info); +} diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h index 6a82d39..fd01d90 100644 --- a/fs/9p/v9fs_vfs.h +++ b/fs/9p/v9fs_vfs.h @@ -45,10 +45,10 @@ extern struct dentry_operations v9fs_dentry_operations; extern struct dentry_operations v9fs_cached_dentry_operations; struct inode *v9fs_get_inode(struct super_block *sb, int mode); -ino_t v9fs_qid2ino(struct v9fs_qid *qid); -void v9fs_stat2inode(struct v9fs_stat *, struct inode *, struct super_block *); +ino_t v9fs_qid2ino(struct p9_qid *qid); +void v9fs_stat2inode(struct p9_stat *, struct inode *, struct super_block *); int v9fs_dir_release(struct inode *inode, struct file *filp); int v9fs_file_open(struct inode *inode, struct file *file); -void v9fs_inode2stat(struct inode *inode, struct v9fs_stat *stat); +void v9fs_inode2stat(struct inode *inode, struct p9_stat *stat); void v9fs_dentry_release(struct dentry *); int v9fs_uflags2omode(int uflags); diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 9ac4ffe..6248f0e 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -33,10 +33,10 @@ #include <linux/pagemap.h> #include <linux/idr.h> #include <linux/sched.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> -#include "debug.h" #include "v9fs.h" -#include "9p.h" #include "v9fs_vfs.h" #include "fid.h" @@ -50,55 +50,26 @@ static int v9fs_vfs_readpage(struct file *filp, struct page *page) { - char *buffer = NULL; - int retval = -EIO; - loff_t offset = page_offset(page); - int count = PAGE_CACHE_SIZE; - struct inode *inode = filp->f_path.dentry->d_inode; - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); - int rsize = v9ses->maxdata - V9FS_IOHDRSZ; - struct v9fs_fid *v9f = filp->private_data; - struct v9fs_fcall *fcall = NULL; - int fid = v9f->fid; - int total = 0; - int result = 0; - - dprintk(DEBUG_VFS, "\n"); + int retval; + loff_t offset; + char *buffer; + struct p9_fid *fid; + P9_DPRINTK(P9_DEBUG_VFS, "\n"); + fid = filp->private_data; buffer = kmap(page); - do { - if (count < rsize) - rsize = count; - - result = v9fs_t_read(v9ses, fid, offset, rsize, &fcall); - - if (result < 0) { - printk(KERN_ERR "v9fs_t_read returned %d\n", - result); - - kfree(fcall); - goto UnmapAndUnlock; - } else - offset += result; - - memcpy(buffer, fcall->params.rread.data, result); - - count -= result; - buffer += result; - total += result; - - kfree(fcall); + offset = page_offset(page); - if (result < rsize) - break; - } while (count); + retval = p9_client_readn(fid, buffer, offset, PAGE_CACHE_SIZE); + if (retval < 0) + goto done; - memset(buffer, 0, count); + memset(buffer + retval, 0, PAGE_CACHE_SIZE - retval); flush_dcache_page(page); SetPageUptodate(page); retval = 0; -UnmapAndUnlock: +done: kunmap(page); unlock_page(page); return retval; diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c index d939604..f9534f1 100644 --- a/fs/9p/vfs_dentry.c +++ b/fs/9p/vfs_dentry.c @@ -34,10 +34,10 @@ #include <linux/namei.h> #include <linux/idr.h> #include <linux/sched.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> -#include "debug.h" #include "v9fs.h" -#include "9p.h" #include "v9fs_vfs.h" #include "fid.h" @@ -52,7 +52,7 @@ static int v9fs_dentry_delete(struct dentry *dentry) { - dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); + P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); return 1; } @@ -69,7 +69,7 @@ static int v9fs_dentry_delete(struct dentry *dentry) static int v9fs_cached_dentry_delete(struct dentry *dentry) { struct inode *inode = dentry->d_inode; - dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); + P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); if(!inode) return 1; @@ -85,26 +85,19 @@ static int v9fs_cached_dentry_delete(struct dentry *dentry) void v9fs_dentry_release(struct dentry *dentry) { - int err; - - dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); - - if (dentry->d_fsdata != NULL) { - struct list_head *fid_list = dentry->d_fsdata; - struct v9fs_fid *temp = NULL; - struct v9fs_fid *current_fid = NULL; - - list_for_each_entry_safe(current_fid, temp, fid_list, list) { - err = v9fs_t_clunk(current_fid->v9ses, current_fid->fid); - - if (err < 0) - dprintk(DEBUG_ERROR, "clunk failed: %d name %s\n", - err, dentry->d_iname); - - v9fs_fid_destroy(current_fid); + struct v9fs_dentry *dent; + struct p9_fid *temp, *current_fid; + + P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); + dent = dentry->d_fsdata; + if (dent) { + list_for_each_entry_safe(current_fid, temp, &dent->fidlist, + dlist) { + p9_client_clunk(current_fid); } - kfree(dentry->d_fsdata); /* free the list_head */ + kfree(dent); + dentry->d_fsdata = NULL; } } diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c index 1dd86ee..0924d44 100644 --- a/fs/9p/vfs_dir.c +++ b/fs/9p/vfs_dir.c @@ -32,11 +32,10 @@ #include <linux/sched.h> #include <linux/inet.h> #include <linux/idr.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> -#include "debug.h" #include "v9fs.h" -#include "9p.h" -#include "conv.h" #include "v9fs_vfs.h" #include "fid.h" @@ -46,14 +45,14 @@ * */ -static inline int dt_type(struct v9fs_stat *mistat) +static inline int dt_type(struct p9_stat *mistat) { unsigned long perm = mistat->mode; int rettype = DT_REG; - if (perm & V9FS_DMDIR) + if (perm & P9_DMDIR) rettype = DT_DIR; - if (perm & V9FS_DMSYMLINK) + if (perm & P9_DMSYMLINK) rettype = DT_LNK; return rettype; @@ -69,106 +68,36 @@ static inline int dt_type(struct v9fs_stat *mistat) static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir) { - struct v9fs_fcall *fcall = NULL; - struct inode *inode = filp->f_path.dentry->d_inode; - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); - struct v9fs_fid *file = filp->private_data; - unsigned int i, n, s; - int fid = -1; - int ret = 0; - struct v9fs_stat stat; - int over = 0; - - dprintk(DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name); - - fid = file->fid; - - if (file->rdir_fcall && (filp->f_pos != file->rdir_pos)) { - kfree(file->rdir_fcall); - file->rdir_fcall = NULL; - } - - if (file->rdir_fcall) { - n = file->rdir_fcall->params.rread.count; - i = file->rdir_fpos; - while (i < n) { - s = v9fs_deserialize_stat( - file->rdir_fcall->params.rread.data + i, - n - i, &stat, v9ses->extended); - - if (s == 0) { - dprintk(DEBUG_ERROR, - "error while deserializing stat\n"); - ret = -EIO; - goto FreeStructs; - } - - over = filldir(dirent, stat.name.str, stat.name.len, - filp->f_pos, v9fs_qid2ino(&stat.qid), - dt_type(&stat)); - - if (over) { - file->rdir_fpos = i; - file->rdir_pos = filp->f_pos; - break; - } - - i += s; - filp->f_pos += s; - } - - if (!over) { - kfree(file->rdir_fcall); - file->rdir_fcall = NULL; - } - } - - while (!over) { - ret = v9fs_t_read(v9ses, fid, filp->f_pos, - v9ses->maxdata-V9FS_IOHDRSZ, &fcall); - if (ret < 0) { - dprintk(DEBUG_ERROR, "error while reading: %d: %p\n", - ret, fcall); - goto FreeStructs; - } else if (ret == 0) + int over; + struct p9_fid *fid; + struct v9fs_session_info *v9ses; + struct inode *inode; + struct p9_stat *st; + + P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name); + inode = filp->f_path.dentry->d_inode; + v9ses = v9fs_inode2v9ses(inode); + fid = filp->private_data; + while ((st = p9_client_dirread(fid, filp->f_pos)) != NULL) { + if (IS_ERR(st)) + return PTR_ERR(st); + + over = filldir(dirent, st->name.str, st->name.len, filp->f_pos, + v9fs_qid2ino(&st->qid), dt_type(st)); + + if (over) break; - n = ret; - i = 0; - while (i < n) { - s = v9fs_deserialize_stat(fcall->params.rread.data + i, - n - i, &stat, v9ses->extended); - - if (s == 0) { - dprintk(DEBUG_ERROR, - "error while deserializing stat\n"); - return -EIO; - } - - over = filldir(dirent, stat.name.str, stat.name.len, - filp->f_pos, v9fs_qid2ino(&stat.qid), - dt_type(&stat)); - - if (over) { - file->rdir_fcall = fcall; - file->rdir_fpos = i; - file->rdir_pos = filp->f_pos; - fcall = NULL; - break; - } - - i += s; - filp->f_pos += s; - } - - kfree(fcall); + filp->f_pos += st->size; + kfree(st); + st = NULL; } - FreeStructs: - kfree(fcall); - return ret; + kfree(st); + return 0; } + /** * v9fs_dir_release - close a directory * @inode: inode of the directory @@ -178,29 +107,13 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir) int v9fs_dir_release(struct inode *inode, struct file *filp) { - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); - struct v9fs_fid *fid = filp->private_data; - int fidnum = -1; - - dprintk(DEBUG_VFS, "inode: %p filp: %p fid: %d\n", inode, filp, - fid->fid); - fidnum = fid->fid; + struct p9_fid *fid; + fid = filp->private_data; + P9_DPRINTK(P9_DEBUG_VFS, + "inode: %p filp: %p fid: %d\n", inode, filp, fid->fid); filemap_write_and_wait(inode->i_mapping); - - if (fidnum >= 0) { - dprintk(DEBUG_VFS, "fidopen: %d v9f->fid: %d\n", fid->fidopen, - fid->fid); - - if (v9fs_t_clunk(v9ses, fidnum)) - dprintk(DEBUG_ERROR, "clunk failed\n"); - - kfree(fid->rdir_fcall); - kfree(fid); - - filp->private_data = NULL; - } - + p9_client_clunk(fid); return 0; } diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 6e7678e..c1f7c02 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -34,10 +34,10 @@ #include <linux/list.h> #include <asm/uaccess.h> #include <linux/idr.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> -#include "debug.h" #include "v9fs.h" -#include "9p.h" #include "v9fs_vfs.h" #include "fid.h" @@ -52,48 +52,36 @@ static const struct file_operations v9fs_cached_file_operations; int v9fs_file_open(struct inode *inode, struct file *file) { - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); - struct v9fs_fid *vfid; - struct v9fs_fcall *fcall = NULL; - int omode; int err; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + int omode; - dprintk(DEBUG_VFS, "inode: %p file: %p \n", inode, file); - - vfid = v9fs_fid_clone(file->f_path.dentry); - if (IS_ERR(vfid)) - return PTR_ERR(vfid); - + P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p \n", inode, file); + v9ses = v9fs_inode2v9ses(inode); omode = v9fs_uflags2omode(file->f_flags); - err = v9fs_t_open(v9ses, vfid->fid, omode, &fcall); + fid = file->private_data; + if (!fid) { + fid = v9fs_fid_clone(file->f_path.dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + err = p9_client_open(fid, omode); if (err < 0) { - PRINT_FCALL_ERROR("open failed", fcall); - goto Clunk_Fid; + p9_client_clunk(fid); + return err; + } } - file->private_data = vfid; - vfid->fidopen = 1; - vfid->fidclunked = 0; - vfid->iounit = fcall->params.ropen.iounit; - vfid->rdir_pos = 0; - vfid->rdir_fcall = NULL; - vfid->filp = file; - kfree(fcall); - - if((vfid->qid.version) && (v9ses->cache)) { - dprintk(DEBUG_VFS, "cached"); + file->private_data = fid; + if ((fid->qid.version) && (v9ses->cache)) { + P9_DPRINTK(P9_DEBUG_VFS, "cached"); /* enable cached file options */ if(file->f_op == &v9fs_file_operations) file->f_op = &v9fs_cached_file_operations; } return 0; - -Clunk_Fid: - v9fs_fid_clunk(v9ses, vfid); - kfree(fcall); - - return err; } /** @@ -110,7 +98,7 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl) int res = 0; struct inode *inode = filp->f_path.dentry->d_inode; - dprintk(DEBUG_VFS, "filp: %p lock: %p\n", filp, fl); + P9_DPRINTK(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl); /* No mandatory locks */ if ((inode->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID) @@ -136,55 +124,16 @@ static ssize_t v9fs_file_read(struct file *filp, char __user * data, size_t count, loff_t * offset) { - struct inode *inode = filp->f_path.dentry->d_inode; - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); - struct v9fs_fid *v9f = filp->private_data; - struct v9fs_fcall *fcall = NULL; - int fid = v9f->fid; - int rsize = 0; - int result = 0; - int total = 0; - int n; - - dprintk(DEBUG_VFS, "\n"); - - rsize = v9ses->maxdata - V9FS_IOHDRSZ; - if (v9f->iounit != 0 && rsize > v9f->iounit) - rsize = v9f->iounit; - - do { - if (count < rsize) - rsize = count; + int ret; + struct p9_fid *fid; - result = v9fs_t_read(v9ses, fid, *offset, rsize, &fcall); + P9_DPRINTK(P9_DEBUG_VFS, "\n"); + fid = filp->private_data; + ret = p9_client_uread(fid, data, *offset, count); + if (ret > 0) + *offset += ret; - if (result < 0) { - printk(KERN_ERR "9P2000: v9fs_t_read returned %d\n", - result); - - kfree(fcall); - return total; - } else - *offset += result; - - n = copy_to_user(data, fcall->params.rread.data, result); - if (n) { - dprintk(DEBUG_ERROR, "Problem copying to user %d\n", n); - kfree(fcall); - return -EFAULT; - } - - count -= result; - data += result; - total += result; - - kfree(fcall); - - if (result < rsize) - break; - } while (count); - - return total; + return ret; } /** @@ -200,50 +149,19 @@ static ssize_t v9fs_file_write(struct file *filp, const char __user * data, size_t count, loff_t * offset) { - struct inode *inode = filp->f_path.dentry->d_inode; - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode); - struct v9fs_fid *v9fid = filp->private_data; - struct v9fs_fcall *fcall; - int fid = v9fid->fid; - int result = -EIO; - int rsize = 0; - int total = 0; - - dprintk(DEBUG_VFS, "data %p count %d offset %x\n", data, (int)count, - (int)*offset); - rsize = v9ses->maxdata - V9FS_IOHDRSZ; - if (v9fid->iounit != 0 && rsize > v9fid->iounit) - rsize = v9fid->iounit; - - do { - if (count < rsize) - rsize = count; + int ret; + struct p9_fid *fid; - result = v9fs_t_write(v9ses, fid, *offset, rsize, data, &fcall); - if (result < 0) { - PRINT_FCALL_ERROR("error while writing", fcall); - kfree(fcall); - return result; - } else - *offset += result; - - kfree(fcall); - fcall = NULL; - - if (result != rsize) { - eprintk(KERN_ERR, - "short write: v9fs_t_write returned %d\n", - result); - break; - } + P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data, + (int)count, (int)*offset); - count -= result; - data += result; - total += result; - } while (count); + fid = filp->private_data; + ret = p9_client_uwrite(fid, data, *offset, count); + if (ret > 0) + *offset += ret; - invalidate_inode_pages2(inode->i_mapping); - return total; + invalidate_inode_pages2(filp->f_path.dentry->d_inode->i_mapping); + return ret; } static const struct file_operations v9fs_cached_file_operations = { diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index c76cd8f..c602c0e 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -34,10 +34,10 @@ #include <linux/namei.h> #include <linux/idr.h> #include <linux/sched.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> -#include "debug.h" #include "v9fs.h" -#include "9p.h" #include "v9fs_vfs.h" #include "fid.h" @@ -58,27 +58,27 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode) int res; res = mode & 0777; if (S_ISDIR(mode)) - res |= V9FS_DMDIR; + res |= P9_DMDIR; if (v9ses->extended) { if (S_ISLNK(mode)) - res |= V9FS_DMSYMLINK; + res |= P9_DMSYMLINK; if (v9ses->nodev == 0) { if (S_ISSOCK(mode)) - res |= V9FS_DMSOCKET; + res |= P9_DMSOCKET; if (S_ISFIFO(mode)) - res |= V9FS_DMNAMEDPIPE; + res |= P9_DMNAMEDPIPE; if (S_ISBLK(mode)) - res |= V9FS_DMDEVICE; + res |= P9_DMDEVICE; if (S_ISCHR(mode)) - res |= V9FS_DMDEVICE; + res |= P9_DMDEVICE; } if ((mode & S_ISUID) == S_ISUID) - res |= V9FS_DMSETUID; + res |= P9_DMSETUID; if ((mode & S_ISGID) == S_ISGID) - res |= V9FS_DMSETGID; - if ((mode & V9FS_DMLINK)) - res |= V9FS_DMLINK; + res |= P9_DMSETGID; + if ((mode & P9_DMLINK)) + res |= P9_DMLINK; } return res; @@ -97,27 +97,27 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode) res = mode & 0777; - if ((mode & V9FS_DMDIR) == V9FS_DMDIR) + if ((mode & P9_DMDIR) == P9_DMDIR) res |= S_IFDIR; - else if ((mode & V9FS_DMSYMLINK) && (v9ses->extended)) + else if ((mode & P9_DMSYMLINK) && (v9ses->extended)) res |= S_IFLNK; - else if ((mode & V9FS_DMSOCKET) && (v9ses->extended) + else if ((mode & P9_DMSOCKET) && (v9ses->extended) && (v9ses->nodev == 0)) res |= S_IFSOCK; - else if ((mode & V9FS_DMNAMEDPIPE) && (v9ses->extended) + else if ((mode & P9_DMNAMEDPIPE) && (v9ses->extended) && (v9ses->nodev == 0)) res |= S_IFIFO; - else if ((mode & V9FS_DMDEVICE) && (v9ses->extended) + else if ((mode & P9_DMDEVICE) && (v9ses->extended) && (v9ses->nodev == 0)) res |= S_IFBLK; else res |= S_IFREG; if (v9ses->extended) { - if ((mode & V9FS_DMSETUID) == V9FS_DMSETUID) + if ((mode & P9_DMSETUID) == P9_DMSETUID) res |= S_ISUID; - if ((mode & V9FS_DMSETGID) == V9FS_DMSETGID) + if ((mode & P9_DMSETGID) == P9_DMSETGID) res |= S_ISGID; } @@ -132,26 +132,26 @@ int v9fs_uflags2omode(int uflags) switch (uflags&3) { default: case O_RDONLY: - ret = V9FS_OREAD; + ret = P9_OREAD; break; case O_WRONLY: - ret = V9FS_OWRITE; + ret = P9_OWRITE; break; case O_RDWR: - ret = V9FS_ORDWR; + ret = P9_ORDWR; break; } if (uflags & O_EXCL) - ret |= V9FS_OEXCL; + ret |= P9_OEXCL; if (uflags & O_TRUNC) - ret |= V9FS_OTRUNC; + ret |= P9_OTRUNC; if (uflags & O_APPEND) - ret |= V9FS_OAPPEND; + ret |= P9_OAPPEND; return ret; } @@ -164,7 +164,7 @@ int v9fs_uflags2omode(int uflags) */ static void -v9fs_blank_wstat(struct v9fs_wstat *wstat) +v9fs_blank_wstat(struct p9_wstat *wstat) { wstat->type = ~0; wstat->dev = ~0; @@ -197,7 +197,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) struct inode *inode; struct v9fs_session_info *v9ses = sb->s_fs_info; - dprintk(DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); + P9_DPRINTK(P9_DEBUG_VFS, "super block: %p mode: %o\n", sb, mode); inode = new_inode(sb); if (inode) { @@ -215,7 +215,8 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) case S_IFCHR: case S_IFSOCK: if(!v9ses->extended) { - dprintk(DEBUG_ERROR, "special files without extended mode\n"); + P9_DPRINTK(P9_DEBUG_ERROR, + "special files without extended mode\n"); return ERR_PTR(-EINVAL); } init_special_inode(inode, inode->i_mode, @@ -227,7 +228,8 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) break; case S_IFLNK: if(!v9ses->extended) { - dprintk(DEBUG_ERROR, "extended modes used w/o 9P2000.u\n"); + P9_DPRINTK(P9_DEBUG_ERROR, + "extended modes used w/o 9P2000.u\n"); return ERR_PTR(-EINVAL); } inode->i_op = &v9fs_symlink_inode_operations; @@ -241,71 +243,19 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) inode->i_fop = &v9fs_dir_operations; break; default: - dprintk(DEBUG_ERROR, "BAD mode 0x%x S_IFMT 0x%x\n", + P9_DPRINTK(P9_DEBUG_ERROR, + "BAD mode 0x%x S_IFMT 0x%x\n", mode, mode & S_IFMT); return ERR_PTR(-EINVAL); } } else { - eprintk(KERN_WARNING, "Problem allocating inode\n"); + P9_EPRINTK(KERN_WARNING, "Problem allocating inode\n"); return ERR_PTR(-ENOMEM); } return inode; } -static int -v9fs_create(struct v9fs_session_info *v9ses, u32 pfid, char *name, u32 perm, - u8 mode, char *extension, u32 *fidp, struct v9fs_qid *qid, u32 *iounit) -{ - int fid; - int err; - struct v9fs_fcall *fcall; - - fid = v9fs_get_idpool(&v9ses->fidpool); - if (fid < 0) { - eprintk(KERN_WARNING, "no free fids available\n"); - return -ENOSPC; - } - - err = v9fs_t_walk(v9ses, pfid, fid, NULL, &fcall); - if (err < 0) { - PRINT_FCALL_ERROR("clone error", fcall); - if (fcall && fcall->id == RWALK) - goto clunk_fid; - else - goto put_fid; - } - kfree(fcall); - - err = v9fs_t_create(v9ses, fid, name, perm, mode, extension, &fcall); - if (err < 0) { - PRINT_FCALL_ERROR("create fails", fcall); - goto clunk_fid; - } - - if (iounit) - *iounit = fcall->params.rcreate.iounit; - - if (qid) - *qid = fcall->params.rcreate.qid; - - if (fidp) - *fidp = fid; - - kfree(fcall); - return 0; - -clunk_fid: - v9fs_t_clunk(v9ses, fid); - fid = V9FS_NOFID; - -put_fid: - if (fid != V9FS_NOFID) - v9fs_put_idpool(fid, &v9ses->fidpool); - - kfree(fcall); - return err; -} - +/* static struct v9fs_fid* v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry) { @@ -355,23 +305,25 @@ error: kfree(fcall); return ERR_PTR(err); } +*/ static struct inode * -v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid, +v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid, struct super_block *sb) { int err, umode; struct inode *ret; - struct v9fs_fcall *fcall; + struct p9_stat *st; ret = NULL; - err = v9fs_t_stat(v9ses, fid, &fcall); - if (err) { - PRINT_FCALL_ERROR("stat error", fcall); + st = p9_client_stat(fid); + if (IS_ERR(st)) { + err = PTR_ERR(st); + st = NULL; goto error; } - umode = p9mode2unixmode(v9ses, fcall->params.rstat.stat.mode); + umode = p9mode2unixmode(v9ses, st->mode); ret = v9fs_get_inode(sb, umode); if (IS_ERR(ret)) { err = PTR_ERR(ret); @@ -379,12 +331,13 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, u32 fid, goto error; } - v9fs_stat2inode(&fcall->params.rstat.stat, ret, sb); - kfree(fcall); + v9fs_stat2inode(st, ret, sb); + ret->i_ino = v9fs_qid2ino(&st->qid); + kfree(st); return ret; error: - kfree(fcall); + kfree(st); if (ret) iput(ret); @@ -401,43 +354,20 @@ error: static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir) { - struct v9fs_fcall *fcall = NULL; - struct super_block *sb = NULL; - struct v9fs_session_info *v9ses = NULL; - struct v9fs_fid *v9fid = NULL; - struct inode *file_inode = NULL; - int fid = -1; - int result = 0; + struct inode *file_inode; + struct v9fs_session_info *v9ses; + struct p9_fid *v9fid; - dprintk(DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, + P9_DPRINTK(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %d\n", dir, file, rmdir); file_inode = file->d_inode; - sb = file_inode->i_sb; v9ses = v9fs_inode2v9ses(file_inode); v9fid = v9fs_fid_clone(file); if(IS_ERR(v9fid)) return PTR_ERR(v9fid); - fid = v9fid->fid; - if (fid < 0) { - dprintk(DEBUG_ERROR, "inode #%lu, no fid!\n", - file_inode->i_ino); - return -EBADF; - } - - result = v9fs_t_remove(v9ses, fid, &fcall); - if (result < 0) { - PRINT_FCALL_ERROR("remove fails", fcall); - goto Error; - } - - v9fs_put_idpool(fid, &v9ses->fidpool); - v9fs_fid_destroy(v9fid); - -Error: - kfree(fcall); - return result; + return p9_client_remove(v9fid); } static int @@ -446,61 +376,59 @@ v9fs_open_created(struct inode *inode, struct file *file) return 0; } + /** - * v9fs_vfs_create - VFS hook to create files - * @inode: directory inode that is being deleted - * @dentry: dentry that is being deleted - * @mode: create permissions - * @nd: path information + * v9fs_create - Create a file + * @dentry: dentry that is being created + * @perm: create permissions + * @mode: open mode * */ - -static int -v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *nd) +static struct p9_fid * +v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir, + struct dentry *dentry, char *extension, u32 perm, u8 mode) { int err; - u32 fid, perm, iounit; - int flags; - struct v9fs_session_info *v9ses; - struct v9fs_fid *dfid, *vfid, *ffid; + char *name; + struct p9_fid *dfid, *ofid, *fid; struct inode *inode; - struct v9fs_qid qid; - struct file *filp; - inode = NULL; - vfid = NULL; - v9ses = v9fs_inode2v9ses(dir); + err = 0; + ofid = NULL; + fid = NULL; + name = (char *) dentry->d_name.name; dfid = v9fs_fid_clone(dentry->d_parent); if(IS_ERR(dfid)) { err = PTR_ERR(dfid); + dfid = NULL; goto error; } - perm = unixmode2p9mode(v9ses, mode); - if (nd && nd->flags & LOOKUP_OPEN) - flags = nd->intent.open.flags - 1; - else - flags = O_RDWR; - - err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, - perm, v9fs_uflags2omode(flags), NULL, &fid, &qid, &iounit); + /* clone a fid to use for creation */ + ofid = p9_client_walk(dfid, 0, NULL, 1); + if (IS_ERR(ofid)) { + err = PTR_ERR(ofid); + ofid = NULL; + goto error; + } - if (err) - goto clunk_dfid; + err = p9_client_fcreate(ofid, name, perm, mode, extension); + if (err < 0) + goto error; - vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); - v9fs_fid_clunk(v9ses, dfid); - if (IS_ERR(vfid)) { - err = PTR_ERR(vfid); - vfid = NULL; + /* now walk from the parent so we can get unopened fid */ + fid = p9_client_walk(dfid, 1, &name, 0); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + fid = NULL; goto error; - } + } else + dfid = NULL; - inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); + /* instantiate inode and assign the unopened fid to the dentry */ + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); if (IS_ERR(inode)) { err = PTR_ERR(inode); - inode = NULL; goto error; } @@ -508,35 +436,78 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, dentry->d_op = &v9fs_cached_dentry_operations; else dentry->d_op = &v9fs_dentry_operations; + d_instantiate(dentry, inode); + v9fs_fid_add(dentry, fid); + return ofid; - if (nd && nd->flags & LOOKUP_OPEN) { - ffid = v9fs_fid_create(v9ses, fid); - if (!ffid) - return -ENOMEM; +error: + if (dfid) + p9_client_clunk(dfid); + + if (ofid) + p9_client_clunk(ofid); + + if (fid) + p9_client_clunk(fid); + + return ERR_PTR(err); +} + +/** + * v9fs_vfs_create - VFS hook to create files + * @inode: directory inode that is being created + * @dentry: dentry that is being deleted + * @mode: create permissions + * @nd: path information + * + */ +static int +v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *nd) +{ + int err; + u32 perm; + int flags; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct file *filp; + + err = 0; + fid = NULL; + v9ses = v9fs_inode2v9ses(dir); + perm = unixmode2p9mode(v9ses, mode); + if (nd && nd->flags & LOOKUP_OPEN) + flags = nd->intent.open.flags - 1; + else + flags = O_RDWR; + + fid = v9fs_create(v9ses, dir, dentry, NULL, perm, + v9fs_uflags2omode(flags)); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + fid = NULL; + goto error; + } + + /* if we are opening a file, assign the open fid to the file */ + if (nd && nd->flags & LOOKUP_OPEN) { filp = lookup_instantiate_filp(nd, dentry, v9fs_open_created); if (IS_ERR(filp)) { - v9fs_fid_destroy(ffid); - return PTR_ERR(filp); + err = PTR_ERR(filp); + goto error; } - ffid->rdir_pos = 0; - ffid->rdir_fcall = NULL; - ffid->fidopen = 1; - ffid->iounit = iounit; - ffid->filp = filp; - filp->private_data = ffid; - } + filp->private_data = fid; + } else + p9_client_clunk(fid); return 0; -clunk_dfid: - v9fs_fid_clunk(v9ses, dfid); - error: - if (vfid) - v9fs_fid_destroy(vfid); + if (fid) + p9_client_clunk(fid); return err; } @@ -552,57 +523,23 @@ error: static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) { int err; - u32 fid, perm; + u32 perm; struct v9fs_session_info *v9ses; - struct v9fs_fid *dfid, *vfid; - struct inode *inode; + struct p9_fid *fid; - inode = NULL; - vfid = NULL; + P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name); + err = 0; v9ses = v9fs_inode2v9ses(dir); - dfid = v9fs_fid_clone(dentry->d_parent); - if(IS_ERR(dfid)) { - err = PTR_ERR(dfid); - goto error; - } - perm = unixmode2p9mode(v9ses, mode | S_IFDIR); - - err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, - perm, V9FS_OREAD, NULL, &fid, NULL, NULL); - - if (err) { - dprintk(DEBUG_ERROR, "create error %d\n", err); - goto clean_up_dfid; + fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + fid = NULL; } - vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); - if (IS_ERR(vfid)) { - err = PTR_ERR(vfid); - vfid = NULL; - goto clean_up_dfid; - } + if (fid) + p9_client_clunk(fid); - v9fs_fid_clunk(v9ses, dfid); - inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - inode = NULL; - v9fs_fid_destroy(vfid); - goto error; - } - - if(v9ses->cache) - dentry->d_op = &v9fs_cached_dentry_operations; - else - dentry->d_op = &v9fs_dentry_operations; - d_instantiate(dentry, inode); - return 0; - -clean_up_dfid: - v9fs_fid_clunk(v9ses, dfid); - -error: return err; } @@ -619,104 +556,54 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry, { struct super_block *sb; struct v9fs_session_info *v9ses; - struct v9fs_fid *dirfid; - struct v9fs_fid *fid; + struct p9_fid *dfid, *fid; struct inode *inode; - struct v9fs_fcall *fcall = NULL; - int dirfidnum = -1; - int newfid = -1; + char *name; int result = 0; - dprintk(DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", + P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n", dir, dentry->d_name.name, dentry, nameidata); sb = dir->i_sb; v9ses = v9fs_inode2v9ses(dir); - dirfid = v9fs_fid_lookup(dentry->d_parent); - - if(IS_ERR(dirfid)) - return ERR_PTR(PTR_ERR(dirfid)); - - dirfidnum = dirfid->fid; - - newfid = v9fs_get_idpool(&v9ses->fidpool); - if (newfid < 0) { - eprintk(KERN_WARNING, "newfid fails!\n"); - result = -ENOSPC; - goto Release_Dirfid; - } - - result = v9fs_t_walk(v9ses, dirfidnum, newfid, - (char *)dentry->d_name.name, &fcall); - - up(&dirfid->lock); - - if (result < 0) { - if (fcall && fcall->id == RWALK) - v9fs_t_clunk(v9ses, newfid); - else - v9fs_put_idpool(newfid, &v9ses->fidpool); - + dfid = v9fs_fid_lookup(dentry->d_parent); + if (IS_ERR(dfid)) + return ERR_PTR(PTR_ERR(dfid)); + + name = (char *) dentry->d_name.name; + fid = p9_client_walk(dfid, 1, &name, 1); + if (IS_ERR(fid)) { + result = PTR_ERR(fid); if (result == -ENOENT) { d_add(dentry, NULL); - dprintk(DEBUG_VFS, - "Return negative dentry %p count %d\n", - dentry, atomic_read(&dentry->d_count)); - kfree(fcall); return NULL; } - dprintk(DEBUG_ERROR, "walk error:%d\n", result); - goto FreeFcall; - } - kfree(fcall); - - result = v9fs_t_stat(v9ses, newfid, &fcall); - if (result < 0) { - dprintk(DEBUG_ERROR, "stat error\n"); - goto FreeFcall; - } - - inode = v9fs_get_inode(sb, p9mode2unixmode(v9ses, - fcall->params.rstat.stat.mode)); - if (IS_ERR(inode) && (PTR_ERR(inode) == -ENOSPC)) { - eprintk(KERN_WARNING, "inode alloc failes, returns %ld\n", - PTR_ERR(inode)); - - result = -ENOSPC; - goto FreeFcall; + return ERR_PTR(result); } - inode->i_ino = v9fs_qid2ino(&fcall->params.rstat.stat.qid); - - fid = v9fs_fid_create(v9ses, newfid); - if (fid == NULL) { - dprintk(DEBUG_ERROR, "couldn't insert\n"); - result = -ENOMEM; - goto FreeFcall; + inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb); + if (IS_ERR(inode)) { + result = PTR_ERR(inode); + inode = NULL; + goto error; } - result = v9fs_fid_insert(fid, dentry); + result = v9fs_fid_add(dentry, fid); if (result < 0) - goto FreeFcall; + goto error; - fid->qid = fcall->params.rstat.stat.qid; - v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb); if((fid->qid.version)&&(v9ses->cache)) dentry->d_op = &v9fs_cached_dentry_operations; else dentry->d_op = &v9fs_dentry_operations; d_add(dentry, inode); - kfree(fcall); - return NULL; -Release_Dirfid: - up(&dirfid->lock); - -FreeFcall: - kfree(fcall); +error: + if (fid) + p9_client_clunk(fid); return ERR_PTR(result); } @@ -758,73 +645,54 @@ static int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry) { - struct inode *old_inode = old_dentry->d_inode; - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(old_inode); - struct v9fs_fid *oldfid = v9fs_fid_lookup(old_dentry); - struct v9fs_fid *olddirfid; - struct v9fs_fid *newdirfid; - struct v9fs_wstat wstat; - struct v9fs_fcall *fcall = NULL; - int fid = -1; - int olddirfidnum = -1; - int newdirfidnum = -1; - int retval = 0; - - dprintk(DEBUG_VFS, "\n"); + struct inode *old_inode; + struct v9fs_session_info *v9ses; + struct p9_fid *oldfid; + struct p9_fid *olddirfid; + struct p9_fid *newdirfid; + struct p9_wstat wstat; + int retval; + P9_DPRINTK(P9_DEBUG_VFS, "\n"); + retval = 0; + old_inode = old_dentry->d_inode; + v9ses = v9fs_inode2v9ses(old_inode); + oldfid = v9fs_fid_lookup(old_dentry); if(IS_ERR(oldfid)) return PTR_ERR(oldfid); olddirfid = v9fs_fid_clone(old_dentry->d_parent); if(IS_ERR(olddirfid)) { retval = PTR_ERR(olddirfid); - goto Release_lock; + goto done; } newdirfid = v9fs_fid_clone(new_dentry->d_parent); if(IS_ERR(newdirfid)) { retval = PTR_ERR(newdirfid); - goto Clunk_olddir; + goto clunk_olddir; } /* 9P can only handle file rename in the same directory */ if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) { - dprintk(DEBUG_ERROR, "old dir and new dir are different\n"); + P9_DPRINTK(P9_DEBUG_ERROR, + "old dir and new dir are different\n"); retval = -EXDEV; - goto Clunk_newdir; - } - - fid = oldfid->fid; - olddirfidnum = olddirfid->fid; - newdirfidnum = newdirfid->fid; - - if (fid < 0) { - dprintk(DEBUG_ERROR, "no fid for old file #%lu\n", - old_inode->i_ino); - retval = -EBADF; - goto Clunk_newdir; + goto clunk_newdir; } v9fs_blank_wstat(&wstat); wstat.muid = v9ses->name; wstat.name = (char *) new_dentry->d_name.name; + retval = p9_client_wstat(oldfid, &wstat); - retval = v9fs_t_wstat(v9ses, fid, &wstat, &fcall); +clunk_newdir: + p9_client_clunk(olddirfid); - if (retval < 0) - PRINT_FCALL_ERROR("wstat error", fcall); - - kfree(fcall); - -Clunk_newdir: - v9fs_fid_clunk(v9ses, newdirfid); - -Clunk_olddir: - v9fs_fid_clunk(v9ses, olddirfid); - -Release_lock: - up(&oldfid->lock); +clunk_olddir: + p9_client_clunk(newdirfid); +done: return retval; } @@ -840,28 +708,27 @@ static int v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { - struct v9fs_fcall *fcall = NULL; - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); - struct v9fs_fid *fid = v9fs_fid_clone(dentry); - int err = -EPERM; - - dprintk(DEBUG_VFS, "dentry: %p\n", dentry); - if(IS_ERR(fid)) + int err; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_stat *st; + + P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry); + err = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) return PTR_ERR(fid); - err = v9fs_t_stat(v9ses, fid->fid, &fcall); + st = p9_client_stat(fid); + if (IS_ERR(st)) + return PTR_ERR(st); - if (err < 0) - dprintk(DEBUG_ERROR, "stat error\n"); - else { - v9fs_stat2inode(&fcall->params.rstat.stat, dentry->d_inode, - dentry->d_inode->i_sb); + v9fs_stat2inode(st, dentry->d_inode, dentry->d_inode->i_sb); generic_fillattr(dentry->d_inode, stat); - } - kfree(fcall); - v9fs_fid_clunk(v9ses, fid); - return err; + kfree(st); + return 0; } /** @@ -873,13 +740,15 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry, static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) { - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); - struct v9fs_fid *fid = v9fs_fid_clone(dentry); - struct v9fs_fcall *fcall = NULL; - struct v9fs_wstat wstat; - int res = -EPERM; + int retval; + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_wstat wstat; - dprintk(DEBUG_VFS, "\n"); + P9_DPRINTK(P9_DEBUG_VFS, "\n"); + retval = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + fid = v9fs_fid_lookup(dentry); if(IS_ERR(fid)) return PTR_ERR(fid); @@ -904,17 +773,11 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) wstat.n_gid = iattr->ia_gid; } - res = v9fs_t_wstat(v9ses, fid->fid, &wstat, &fcall); + retval = p9_client_wstat(fid, &wstat); + if (retval >= 0) + retval = inode_setattr(dentry->d_inode, iattr); - if (res < 0) - PRINT_FCALL_ERROR("wstat error", fcall); - - kfree(fcall); - if (res >= 0) - res = inode_setattr(dentry->d_inode, iattr); - - v9fs_fid_clunk(v9ses, fid); - return res; + return retval; } /** @@ -926,7 +789,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) */ void -v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, +v9fs_stat2inode(struct p9_stat *stat, struct inode *inode, struct super_block *sb) { int n; @@ -967,8 +830,9 @@ v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, case 'b': break; default: - dprintk(DEBUG_ERROR, "Unknown special type %c (%.*s)\n", - type, stat->extension.len, stat->extension.str); + P9_DPRINTK(P9_DEBUG_ERROR, + "Unknown special type %c (%.*s)\n", type, + stat->extension.len, stat->extension.str); }; inode->i_rdev = MKDEV(major, minor); } else @@ -976,8 +840,8 @@ v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, inode->i_size = stat->length; - inode->i_blocks = - (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits; + /* not real number of blocks, but 512 byte ones ... */ + inode->i_blocks = (inode->i_size + 512 - 1) >> 9; } /** @@ -987,7 +851,7 @@ v9fs_stat2inode(struct v9fs_stat *stat, struct inode *inode, * BUG: potential for inode number collisions? */ -ino_t v9fs_qid2ino(struct v9fs_qid *qid) +ino_t v9fs_qid2ino(struct p9_qid *qid) { u64 path = qid->path + 2; ino_t i = 0; @@ -1010,56 +874,46 @@ ino_t v9fs_qid2ino(struct v9fs_qid *qid) static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen) { - int retval = -EPERM; + int retval; - struct v9fs_fcall *fcall = NULL; - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode); - struct v9fs_fid *fid = v9fs_fid_clone(dentry); + struct v9fs_session_info *v9ses; + struct p9_fid *fid; + struct p9_stat *st; + P9_DPRINTK(P9_DEBUG_VFS, " %s\n", dentry->d_name.name); + retval = -EPERM; + v9ses = v9fs_inode2v9ses(dentry->d_inode); + fid = v9fs_fid_lookup(dentry); if(IS_ERR(fid)) return PTR_ERR(fid); - if (!v9ses->extended) { - retval = -EBADF; - dprintk(DEBUG_ERROR, "not extended\n"); - goto ClunkFid; - } - - dprintk(DEBUG_VFS, " %s\n", dentry->d_name.name); - retval = v9fs_t_stat(v9ses, fid->fid, &fcall); - - if (retval < 0) { - dprintk(DEBUG_ERROR, "stat error\n"); - goto FreeFcall; - } + if (!v9ses->extended) + return -EBADF; - if (!fcall) { - retval = -EIO; - goto ClunkFid; - } + st = p9_client_stat(fid); + if (IS_ERR(st)) + return PTR_ERR(st); - if (!(fcall->params.rstat.stat.mode & V9FS_DMSYMLINK)) { + if (!(st->mode & P9_DMSYMLINK)) { retval = -EINVAL; - goto FreeFcall; + goto done; } /* copy extension buffer into buffer */ - if (fcall->params.rstat.stat.extension.len < buflen) - buflen = fcall->params.rstat.stat.extension.len + 1; + if (st->extension.len < buflen) + buflen = st->extension.len + 1; - memmove(buffer, fcall->params.rstat.stat.extension.str, buflen - 1); + memmove(buffer, st->extension.str, buflen - 1); buffer[buflen-1] = 0; - dprintk(DEBUG_ERROR, "%s -> %.*s (%s)\n", dentry->d_name.name, fcall->params.rstat.stat.extension.len, - fcall->params.rstat.stat.extension.str, buffer); - retval = buflen; + P9_DPRINTK(P9_DEBUG_VFS, + "%s -> %.*s (%s)\n", dentry->d_name.name, st->extension.len, + st->extension.str, buffer); -FreeFcall: - kfree(fcall); - -ClunkFid: - v9fs_fid_clunk(v9ses, fid); + retval = buflen; +done: + kfree(st); return retval; } @@ -1084,14 +938,14 @@ static int v9fs_vfs_readlink(struct dentry *dentry, char __user * buffer, if (buflen > PATH_MAX) buflen = PATH_MAX; - dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); + P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry); retval = v9fs_readlink(dentry, link, buflen); if (retval > 0) { if ((ret = copy_to_user(buffer, link, retval)) != 0) { - dprintk(DEBUG_ERROR, "problem copying to user: %d\n", - ret); + P9_DPRINTK(P9_DEBUG_ERROR, + "problem copying to user: %d\n", ret); retval = ret; } } @@ -1112,7 +966,7 @@ static void *v9fs_vfs_follow_link(struct dentry *dentry, struct nameidata *nd) int len = 0; char *link = __getname(); - dprintk(DEBUG_VFS, "%s n", dentry->d_name.name); + P9_DPRINTK(P9_DEBUG_VFS, "%s n", dentry->d_name.name); if (!link) link = ERR_PTR(-ENOMEM); @@ -1141,7 +995,7 @@ static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void { char *s = nd_get_link(nd); - dprintk(DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); + P9_DPRINTK(P9_DEBUG_VFS, " %s %s\n", dentry->d_name.name, s); if (!IS_ERR(s)) __putname(s); } @@ -1149,66 +1003,24 @@ static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry, int mode, const char *extension) { - int err; - u32 fid, perm; + u32 perm; struct v9fs_session_info *v9ses; - struct v9fs_fid *dfid, *vfid = NULL; - struct inode *inode = NULL; + struct p9_fid *fid; v9ses = v9fs_inode2v9ses(dir); if (!v9ses->extended) { - dprintk(DEBUG_ERROR, "not extended\n"); + P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n"); return -EPERM; } - dfid = v9fs_fid_clone(dentry->d_parent); - if(IS_ERR(dfid)) { - err = PTR_ERR(dfid); - goto error; - } - perm = unixmode2p9mode(v9ses, mode); + fid = v9fs_create(v9ses, dir, dentry, (char *) extension, perm, + P9_OREAD); + if (IS_ERR(fid)) + return PTR_ERR(fid); - err = v9fs_create(v9ses, dfid->fid, (char *) dentry->d_name.name, - perm, V9FS_OREAD, (char *) extension, &fid, NULL, NULL); - - if (err) - goto clunk_dfid; - - err = v9fs_t_clunk(v9ses, fid); - if (err) - goto clunk_dfid; - - vfid = v9fs_clone_walk(v9ses, dfid->fid, dentry); - if (IS_ERR(vfid)) { - err = PTR_ERR(vfid); - vfid = NULL; - goto clunk_dfid; - } - - inode = v9fs_inode_from_fid(v9ses, vfid->fid, dir->i_sb); - if (IS_ERR(inode)) { - err = PTR_ERR(inode); - inode = NULL; - goto free_vfid; - } - - if(v9ses->cache) - dentry->d_op = &v9fs_cached_dentry_operations; - else - dentry->d_op = &v9fs_dentry_operations; - d_instantiate(dentry, inode); + p9_client_clunk(fid); return 0; - -free_vfid: - v9fs_fid_destroy(vfid); - -clunk_dfid: - v9fs_fid_clunk(v9ses, dfid); - -error: - return err; - } /** @@ -1224,8 +1036,8 @@ error: static int v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) { - dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, - symname); + P9_DPRINTK(P9_DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, + dentry->d_name.name, symname); return v9fs_vfs_mkspecial(dir, dentry, S_IFLNK, symname); } @@ -1247,11 +1059,11 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) { int retval; - struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir); - struct v9fs_fid *oldfid; + struct p9_fid *oldfid; char *name; - dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, + P9_DPRINTK(P9_DEBUG_VFS, + " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name, old_dentry->d_name.name); oldfid = v9fs_fid_clone(old_dentry); @@ -1265,11 +1077,11 @@ v9fs_vfs_link(struct dentry *old_dentry, struct inode *dir, } sprintf(name, "%d\n", oldfid->fid); - retval = v9fs_vfs_mkspecial(dir, dentry, V9FS_DMLINK, name); + retval = v9fs_vfs_mkspecial(dir, dentry, P9_DMLINK, name); __putname(name); clunk_fid: - v9fs_fid_clunk(v9ses, oldfid); + p9_client_clunk(oldfid); return retval; } @@ -1288,7 +1100,8 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) int retval; char *name; - dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, + P9_DPRINTK(P9_DEBUG_VFS, + " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino, dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev)); if (!new_valid_dev(rdev)) diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 7bdf8b3..f6a0519 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -37,10 +37,10 @@ #include <linux/mount.h> #include <linux/idr.h> #include <linux/sched.h> +#include <net/9p/9p.h> +#include <net/9p/client.h> -#include "debug.h" #include "v9fs.h" -#include "9p.h" #include "v9fs_vfs.h" #include "fid.h" @@ -107,41 +107,48 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags, struct vfsmount *mnt) { struct super_block *sb = NULL; - struct v9fs_fcall *fcall = NULL; struct inode *inode = NULL; struct dentry *root = NULL; struct v9fs_session_info *v9ses = NULL; - struct v9fs_fid *root_fid = NULL; + struct p9_stat *st = NULL; int mode = S_IRWXUGO | S_ISVTX; uid_t uid = current->fsuid; gid_t gid = current->fsgid; - int stat_result = 0; - int newfid = 0; + struct p9_fid *fid; int retval = 0; - dprintk(DEBUG_VFS, " \n"); + P9_DPRINTK(P9_DEBUG_VFS, " \n"); v9ses = kzalloc(sizeof(struct v9fs_session_info), GFP_KERNEL); if (!v9ses) return -ENOMEM; - if ((newfid = v9fs_session_init(v9ses, dev_name, data)) < 0) { - dprintk(DEBUG_ERROR, "problem initiating session\n"); - retval = newfid; - goto out_free_session; + fid = v9fs_session_init(v9ses, dev_name, data); + if (IS_ERR(fid)) { + retval = PTR_ERR(fid); + fid = NULL; + kfree(v9ses); + v9ses = NULL; + goto error; + } + + st = p9_client_stat(fid); + if (IS_ERR(st)) { + retval = PTR_ERR(st); + goto error; } sb = sget(fs_type, NULL, v9fs_set_super, v9ses); if (IS_ERR(sb)) { retval = PTR_ERR(sb); - goto out_close_session; + goto error; } v9fs_fill_super(sb, v9ses, flags); inode = v9fs_get_inode(sb, S_IFDIR | mode); if (IS_ERR(inode)) { retval = PTR_ERR(inode); - goto put_back_sb; + goto error; } inode->i_uid = uid; @@ -150,54 +157,30 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags, root = d_alloc_root(inode); if (!root) { retval = -ENOMEM; - goto put_back_sb; + goto error; } sb->s_root = root; + root->d_inode->i_ino = v9fs_qid2ino(&st->qid); + v9fs_stat2inode(st, root->d_inode, sb); + v9fs_fid_add(root, fid); - stat_result = v9fs_t_stat(v9ses, newfid, &fcall); - if (stat_result < 0) { - dprintk(DEBUG_ERROR, "stat error\n"); - v9fs_t_clunk(v9ses, newfid); - } else { - /* Setup the Root Inode */ - root_fid = v9fs_fid_create(v9ses, newfid); - if (root_fid == NULL) { - retval = -ENOMEM; - goto put_back_sb; - } - - retval = v9fs_fid_insert(root_fid, root); - if (retval < 0) { - kfree(fcall); - goto put_back_sb; - } - - root_fid->qid = fcall->params.rstat.stat.qid; - root->d_inode->i_ino = - v9fs_qid2ino(&fcall->params.rstat.stat.qid); - v9fs_stat2inode(&fcall->params.rstat.stat, root->d_inode, sb); - } + return simple_set_mnt(mnt, sb); - kfree(fcall); +error: + if (fid) + p9_client_clunk(fid); - if (stat_result < 0) { - retval = stat_result; - goto put_back_sb; + if (v9ses) { + v9fs_session_close(v9ses); + kfree(v9ses); } - return simple_set_mnt(mnt, sb); - -out_close_session: - v9fs_session_close(v9ses); -out_free_session: - kfree(v9ses); - return retval; + if (sb) { + up_write(&sb->s_umount); + deactivate_super(sb); + } -put_back_sb: - /* deactivate_super calls v9fs_kill_super which will frees the rest */ - up_write(&sb->s_umount); - deactivate_super(sb); return retval; } @@ -211,7 +194,7 @@ static void v9fs_kill_super(struct super_block *s) { struct v9fs_session_info *v9ses = s->s_fs_info; - dprintk(DEBUG_VFS, " %p\n", s); + P9_DPRINTK(P9_DEBUG_VFS, " %p\n", s); v9fs_dentry_release(s->s_root); /* clunk root */ @@ -219,7 +202,7 @@ static void v9fs_kill_super(struct super_block *s) v9fs_session_close(v9ses); kfree(v9ses); - dprintk(DEBUG_VFS, "exiting kill_super\n"); + P9_DPRINTK(P9_DEBUG_VFS, "exiting kill_super\n"); } /** @@ -2048,7 +2048,7 @@ config AFS_DEBUG config 9P_FS tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)" - depends on INET && EXPERIMENTAL + depends on INET && NET_9P && EXPERIMENTAL help If you say Y here, you will get experimental support for Plan 9 resource sharing via the 9P2000 protocol. diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h new file mode 100644 index 0000000..88884d3 --- /dev/null +++ b/include/net/9p/9p.h @@ -0,0 +1,417 @@ +/* + * include/net/9p/9p.h + * + * 9P protocol definitions. + * + * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> + * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> + * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#ifndef NET_9P_H +#define NET_9P_H + +#ifdef CONFIG_NET_9P_DEBUG + +#define P9_DEBUG_ERROR (1<<0) +#define P9_DEBUG_9P (1<<2) +#define P9_DEBUG_VFS (1<<3) +#define P9_DEBUG_CONV (1<<4) +#define P9_DEBUG_MUX (1<<5) +#define P9_DEBUG_TRANS (1<<6) +#define P9_DEBUG_SLABS (1<<7) +#define P9_DEBUG_FCALL (1<<8) + +extern unsigned int p9_debug_level; + +#define P9_DPRINTK(level, format, arg...) \ +do { \ + if ((p9_debug_level & level) == level) \ + printk(KERN_NOTICE "-- %s (%d): " \ + format , __FUNCTION__, current->pid , ## arg); \ +} while (0) + +#define PRINT_FCALL_ERROR(s, fcall) P9_DPRINTK(P9_DEBUG_ERROR, \ + "%s: %.*s\n", s, fcall?fcall->params.rerror.error.len:0, \ + fcall?fcall->params.rerror.error.str:""); + +#else +#define P9_DPRINTK(level, format, arg...) do { } while (0) +#define PRINT_FCALL_ERROR(s, fcall) do { } while (0) +#endif + +#define P9_EPRINTK(level, format, arg...) \ +do { \ + printk(level "9p: %s (%d): " \ + format , __FUNCTION__, current->pid , ## arg); \ +} while (0) + + +/* Message Types */ +enum { + P9_TVERSION = 100, + P9_RVERSION, + P9_TAUTH = 102, + P9_RAUTH, + P9_TATTACH = 104, + P9_RATTACH, + P9_TERROR = 106, + P9_RERROR, + P9_TFLUSH = 108, + P9_RFLUSH, + P9_TWALK = 110, + P9_RWALK, + P9_TOPEN = 112, + P9_ROPEN, + P9_TCREATE = 114, + P9_RCREATE, + P9_TREAD = 116, + P9_RREAD, + P9_TWRITE = 118, + P9_RWRITE, + P9_TCLUNK = 120, + P9_RCLUNK, + P9_TREMOVE = 122, + P9_RREMOVE, + P9_TSTAT = 124, + P9_RSTAT, + P9_TWSTAT = 126, + P9_RWSTAT, +}; + +/* open modes */ +enum { + P9_OREAD = 0x00, + P9_OWRITE = 0x01, + P9_ORDWR = 0x02, + P9_OEXEC = 0x03, + P9_OEXCL = 0x04, + P9_OTRUNC = 0x10, + P9_OREXEC = 0x20, + P9_ORCLOSE = 0x40, + P9_OAPPEND = 0x80, +}; + +/* permissions */ +enum { + P9_DMDIR = 0x80000000, + P9_DMAPPEND = 0x40000000, + P9_DMEXCL = 0x20000000, + P9_DMMOUNT = 0x10000000, + P9_DMAUTH = 0x08000000, + P9_DMTMP = 0x04000000, + P9_DMSYMLINK = 0x02000000, + P9_DMLINK = 0x01000000, + /* 9P2000.u extensions */ + P9_DMDEVICE = 0x00800000, + P9_DMNAMEDPIPE = 0x00200000, + P9_DMSOCKET = 0x00100000, + P9_DMSETUID = 0x00080000, + P9_DMSETGID = 0x00040000, +}; + +/* qid.types */ +enum { + P9_QTDIR = 0x80, + P9_QTAPPEND = 0x40, + P9_QTEXCL = 0x20, + P9_QTMOUNT = 0x10, + P9_QTAUTH = 0x08, + P9_QTTMP = 0x04, + P9_QTSYMLINK = 0x02, + P9_QTLINK = 0x01, + P9_QTFILE = 0x00, +}; + +#define P9_NOTAG (u16)(~0) +#define P9_NOFID (u32)(~0) +#define P9_MAXWELEM 16 + +/* ample room for Twrite/Rread header */ +#define P9_IOHDRSZ 24 + +struct p9_str { + u16 len; + char *str; +}; + +/* qids are the unique ID for a file (like an inode */ +struct p9_qid { + u8 type; + u32 version; + u64 path; +}; + +/* Plan 9 file metadata (stat) structure */ +struct p9_stat { + u16 size; + u16 type; + u32 dev; + struct p9_qid qid; + u32 mode; + u32 atime; + u32 mtime; + u64 length; + struct p9_str name; + struct p9_str uid; + struct p9_str gid; + struct p9_str muid; + struct p9_str extension; /* 9p2000.u extensions */ + u32 n_uid; /* 9p2000.u extensions */ + u32 n_gid; /* 9p2000.u extensions */ + u32 n_muid; /* 9p2000.u extensions */ +}; + +/* file metadata (stat) structure used to create Twstat message + The is similar to p9_stat, but the strings don't point to + the same memory block and should be freed separately +*/ +struct p9_wstat { + u16 size; + u16 type; + u32 dev; + struct p9_qid qid; + u32 mode; + u32 atime; + u32 mtime; + u64 length; + char *name; + char *uid; + char *gid; + char *muid; + char *extension; /* 9p2000.u extensions */ + u32 n_uid; /* 9p2000.u extensions */ + u32 n_gid; /* 9p2000.u extensions */ + u32 n_muid; /* 9p2000.u extensions */ +}; + +/* Structures for Protocol Operations */ +struct p9_tversion { + u32 msize; + struct p9_str version; +}; + +struct p9_rversion { + u32 msize; + struct p9_str version; +}; + +struct p9_tauth { + u32 afid; + struct p9_str uname; + struct p9_str aname; +}; + +struct p9_rauth { + struct p9_qid qid; +}; + +struct p9_rerror { + struct p9_str error; + u32 errno; /* 9p2000.u extension */ +}; + +struct p9_tflush { + u16 oldtag; +}; + +struct p9_rflush { +}; + +struct p9_tattach { + u32 fid; + u32 afid; + struct p9_str uname; + struct p9_str aname; +}; + +struct p9_rattach { + struct p9_qid qid; +}; + +struct p9_twalk { + u32 fid; + u32 newfid; + u16 nwname; + struct p9_str wnames[16]; +}; + +struct p9_rwalk { + u16 nwqid; + struct p9_qid wqids[16]; +}; + +struct p9_topen { + u32 fid; + u8 mode; +}; + +struct p9_ropen { + struct p9_qid qid; + u32 iounit; +}; + +struct p9_tcreate { + u32 fid; + struct p9_str name; + u32 perm; + u8 mode; + struct p9_str extension; +}; + +struct p9_rcreate { + struct p9_qid qid; + u32 iounit; +}; + +struct p9_tread { + u32 fid; + u64 offset; + u32 count; +}; + +struct p9_rread { + u32 count; + u8 *data; +}; + +struct p9_twrite { + u32 fid; + u64 offset; + u32 count; + u8 *data; +}; + +struct p9_rwrite { + u32 count; +}; + +struct p9_tclunk { + u32 fid; +}; + +struct p9_rclunk { +}; + +struct p9_tremove { + u32 fid; +}; + +struct p9_rremove { +}; + +struct p9_tstat { + u32 fid; +}; + +struct p9_rstat { + struct p9_stat stat; +}; + +struct p9_twstat { + u32 fid; + struct p9_stat stat; +}; + +struct p9_rwstat { +}; + +/* + * fcall is the primary packet structure + * + */ + +struct p9_fcall { + u32 size; + u8 id; + u16 tag; + void *sdata; + + union { + struct p9_tversion tversion; + struct p9_rversion rversion; + struct p9_tauth tauth; + struct p9_rauth rauth; + struct p9_rerror rerror; + struct p9_tflush tflush; + struct p9_rflush rflush; + struct p9_tattach tattach; + struct p9_rattach rattach; + struct p9_twalk twalk; + struct p9_rwalk rwalk; + struct p9_topen topen; + struct p9_ropen ropen; + struct p9_tcreate tcreate; + struct p9_rcreate rcreate; + struct p9_tread tread; + struct p9_rread rread; + struct p9_twrite twrite; + struct p9_rwrite rwrite; + struct p9_tclunk tclunk; + struct p9_rclunk rclunk; + struct p9_tremove tremove; + struct p9_rremove rremove; + struct p9_tstat tstat; + struct p9_rstat rstat; + struct p9_twstat twstat; + struct p9_rwstat rwstat; + } params; +}; + +struct p9_idpool; + +int p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat, + int dotu); +int p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *fc, int dotu); +void p9_set_tag(struct p9_fcall *fc, u16 tag); +struct p9_fcall *p9_create_tversion(u32 msize, char *version); +struct p9_fcall *p9_create_tattach(u32 fid, u32 afid, char *uname, + char *aname); +struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname); +struct p9_fcall *p9_create_tflush(u16 oldtag); +struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname, + char **wnames); +struct p9_fcall *p9_create_topen(u32 fid, u8 mode); +struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode, + char *extension, int dotu); +struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count); +struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count, + const char *data); +struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count, + const char __user *data); +struct p9_fcall *p9_create_tclunk(u32 fid); +struct p9_fcall *p9_create_tremove(u32 fid); +struct p9_fcall *p9_create_tstat(u32 fid); +struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat, + int dotu); + +int p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int dotu); +int p9_errstr2errno(char *errstr, int len); + +struct p9_idpool *p9_idpool_create(void); +void p9_idpool_destroy(struct p9_idpool *); +int p9_idpool_get(struct p9_idpool *p); +void p9_idpool_put(int id, struct p9_idpool *p); +int p9_idpool_check(int id, struct p9_idpool *p); + +int p9_error_init(void); +int p9_errstr2errno(char *, int); +int __init p9_sysctl_register(void); +void __exit p9_sysctl_unregister(void); +#endif /* NET_9P_H */ diff --git a/include/net/9p/client.h b/include/net/9p/client.h new file mode 100644 index 0000000..d65ed7c --- /dev/null +++ b/include/net/9p/client.h @@ -0,0 +1,80 @@ +/* + * include/net/9p/client.h + * + * 9P Client Definitions + * + * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#ifndef NET_9P_CLIENT_H +#define NET_9P_CLIENT_H + +struct p9_client { + spinlock_t lock; /* protect client structure */ + int msize; + unsigned char dotu; + struct p9_transport *trans; + struct p9_conn *conn; + + struct p9_idpool *fidpool; + struct list_head fidlist; +}; + +struct p9_fid { + struct p9_client *clnt; + u32 fid; + int mode; + struct p9_qid qid; + u32 iounit; + uid_t uid; + void *aux; + + int rdir_fpos; + int rdir_pos; + struct p9_fcall *rdir_fcall; + struct list_head flist; + struct list_head dlist; /* list of all fids attached to a dentry */ +}; + +struct p9_client *p9_client_create(struct p9_transport *trans, int msize, + int dotu); +void p9_client_destroy(struct p9_client *clnt); +void p9_client_disconnect(struct p9_client *clnt); +struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, + char *uname, char *aname); +struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname); +struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, + int clone); +int p9_client_open(struct p9_fid *fid, int mode); +int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, + char *extension); +int p9_client_clunk(struct p9_fid *fid); +int p9_client_remove(struct p9_fid *fid); +int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count); +int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count); +int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count); +int p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset, + u32 count); +int p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset, + u32 count); +struct p9_stat *p9_client_stat(struct p9_fid *fid); +int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst); +struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset); + +#endif /* NET_9P_CLIENT_H */ diff --git a/fs/9p/mux.h b/include/net/9p/conn.h index fb10c50..583b6a2 100644 --- a/fs/9p/mux.h +++ b/include/net/9p/conn.h @@ -1,7 +1,7 @@ /* - * linux/fs/9p/mux.h + * include/net/9p/conn.h * - * Multiplexer Definitions + * Connection Definitions * * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net> * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> @@ -23,33 +23,35 @@ * */ -struct v9fs_mux_data; -struct v9fs_req; +#ifndef NET_9P_CONN_H +#define NET_9P_CONN_H + +#undef P9_NONBLOCK + +struct p9_conn; +struct p9_req; /** - * v9fs_mux_req_callback - callback function that is called when the + * p9_mux_req_callback - callback function that is called when the * response of a request is received. The callback is called from * a workqueue and shouldn't block. * + * @req - request * @a - the pointer that was specified when the request was send to be * passed to the callback - * @tc - request call - * @rc - response call - * @err - error code (non-zero if error occured) */ -typedef void (*v9fs_mux_req_callback)(struct v9fs_req *req, void *a); +typedef void (*p9_conn_req_callback)(struct p9_req *req, void *a); -int v9fs_mux_global_init(void); -void v9fs_mux_global_exit(void); +struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize, + unsigned char *dotu); +void p9_conn_destroy(struct p9_conn *); +int p9_conn_rpc(struct p9_conn *m, struct p9_fcall *tc, struct p9_fcall **rc); -struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize, - unsigned char *extended); -void v9fs_mux_destroy(struct v9fs_mux_data *); +#ifdef P9_NONBLOCK +int p9_conn_rpcnb(struct p9_conn *m, struct p9_fcall *tc, + p9_conn_req_callback cb, void *a); +#endif /* P9_NONBLOCK */ -int v9fs_mux_send(struct v9fs_mux_data *m, struct v9fs_fcall *tc); -struct v9fs_fcall *v9fs_mux_recv(struct v9fs_mux_data *m); -int v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, struct v9fs_fcall **rc); +void p9_conn_cancel(struct p9_conn *m, int err); -void v9fs_mux_flush(struct v9fs_mux_data *m, int sendflush); -void v9fs_mux_cancel(struct v9fs_mux_data *m, int err); -int v9fs_errstr2errno(char *errstr, int len); +#endif /* NET_9P_CONN_H */ diff --git a/fs/9p/transport.h b/include/net/9p/transport.h index b38a4b8..462d422 100644 --- a/fs/9p/transport.h +++ b/include/net/9p/transport.h @@ -1,5 +1,5 @@ /* - * linux/fs/9p/transport.h + * include/net/9p/transport.h * * Transport Definition * @@ -23,23 +23,27 @@ * */ -enum v9fs_transport_status { +#ifndef NET_9P_TRANSPORT_H +#define NET_9P_TRANSPORT_H + +enum p9_transport_status { Connected, Disconnected, Hung, }; -struct v9fs_transport { - enum v9fs_transport_status status; +struct p9_transport { + enum p9_transport_status status; void *priv; - int (*init) (struct v9fs_session_info *, const char *, char *); - int (*write) (struct v9fs_transport *, void *, int); - int (*read) (struct v9fs_transport *, void *, int); - void (*close) (struct v9fs_transport *); - unsigned int (*poll)(struct v9fs_transport *, struct poll_table_struct *); + int (*write) (struct p9_transport *, void *, int); + int (*read) (struct p9_transport *, void *, int); + void (*close) (struct p9_transport *); + unsigned int (*poll)(struct p9_transport *, struct poll_table_struct *); }; -extern struct v9fs_transport v9fs_trans_tcp; -extern struct v9fs_transport v9fs_trans_unix; -extern struct v9fs_transport v9fs_trans_fd; +struct p9_transport *p9_trans_create_tcp(const char *addr, int port); +struct p9_transport *p9_trans_create_unix(const char *addr); +struct p9_transport *p9_trans_create_fd(int rfd, int wfd); + +#endif /* NET_9P_TRANSPORT_H */ diff --git a/net/9p/Kconfig b/net/9p/Kconfig new file mode 100644 index 0000000..66821cd --- /dev/null +++ b/net/9p/Kconfig @@ -0,0 +1,21 @@ +# +# 9P protocol configuration +# + +menuconfig NET_9P + depends on NET && EXPERIMENTAL + tristate "Plan 9 Resource Sharing Support (9P2000) (Experimental)" + help + If you say Y here, you will get experimental support for + Plan 9 resource sharing via the 9P2000 protocol. + + See <http://v9fs.sf.net> for more information. + + If unsure, say N. + +config NET_9P_DEBUG + bool "Debug information" + depends on NET_9P + help + Say Y if you want the 9P subsistem to log debug information. + diff --git a/net/9p/Makefile b/net/9p/Makefile new file mode 100644 index 0000000..ac46cb9 --- /dev/null +++ b/net/9p/Makefile @@ -0,0 +1,13 @@ +obj-$(CONFIG_NET_9P) := 9p.o + +9p-objs := \ + mod.o \ + trans_fd.o \ + mux.o \ + client.o \ + conv.o \ + error.o \ + fcprint.o \ + util.o \ + +9p-$(CONFIG_SYSCTL) += sysctl.o diff --git a/net/9p/client.c b/net/9p/client.c new file mode 100644 index 0000000..bb2b8a3 --- /dev/null +++ b/net/9p/client.c @@ -0,0 +1,965 @@ +/* + * net/9p/clnt.c + * + * 9P Client + * + * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/idr.h> +#include <linux/mutex.h> +#include <linux/sched.h> +#include <linux/uaccess.h> +#include <net/9p/9p.h> +#include <net/9p/transport.h> +#include <net/9p/conn.h> +#include <net/9p/client.h> + +static struct p9_fid *p9_fid_create(struct p9_client *clnt); +static void p9_fid_destroy(struct p9_fid *fid); +static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu); + +struct p9_client *p9_client_create(struct p9_transport *trans, int msize, + int dotu) +{ + int err, n; + struct p9_client *clnt; + struct p9_fcall *tc, *rc; + struct p9_str *version; + + err = 0; + tc = NULL; + rc = NULL; + clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); + if (!clnt) + return ERR_PTR(-ENOMEM); + + P9_DPRINTK(P9_DEBUG_9P, "clnt %p trans %p msize %d dotu %d\n", + clnt, trans, msize, dotu); + spin_lock_init(&clnt->lock); + clnt->trans = trans; + clnt->msize = msize; + clnt->dotu = dotu; + INIT_LIST_HEAD(&clnt->fidlist); + clnt->fidpool = p9_idpool_create(); + if (!clnt->fidpool) { + err = PTR_ERR(clnt->fidpool); + clnt->fidpool = NULL; + goto error; + } + + clnt->conn = p9_conn_create(clnt->trans, clnt->msize, &clnt->dotu); + if (IS_ERR(clnt->conn)) { + err = PTR_ERR(clnt->conn); + clnt->conn = NULL; + goto error; + } + + tc = p9_create_tversion(clnt->msize, clnt->dotu?"9P2000.u":"9P2000"); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + version = &rc->params.rversion.version; + if (version->len == 8 && !memcmp(version->str, "9P2000.u", 8)) + clnt->dotu = 1; + else if (version->len == 6 && !memcmp(version->str, "9P2000", 6)) + clnt->dotu = 0; + else { + err = -EREMOTEIO; + goto error; + } + + n = rc->params.rversion.msize; + if (n < clnt->msize) + clnt->msize = n; + + kfree(tc); + kfree(rc); + return clnt; + +error: + kfree(tc); + kfree(rc); + p9_client_destroy(clnt); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_client_create); + +void p9_client_destroy(struct p9_client *clnt) +{ + struct p9_fid *fid, *fidptr; + + P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); + if (clnt->conn) { + p9_conn_destroy(clnt->conn); + clnt->conn = NULL; + } + + if (clnt->trans) { + clnt->trans->close(clnt->trans); + kfree(clnt->trans); + clnt->trans = NULL; + } + + if (clnt->fidpool) + p9_idpool_destroy(clnt->fidpool); + + list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) + p9_fid_destroy(fid); + + kfree(clnt); +} +EXPORT_SYMBOL(p9_client_destroy); + +void p9_client_disconnect(struct p9_client *clnt) +{ + P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); + clnt->trans->status = Disconnected; + p9_conn_cancel(clnt->conn, -EIO); +} +EXPORT_SYMBOL(p9_client_disconnect); + +struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, + char *uname, char *aname) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_fid *fid; + + P9_DPRINTK(P9_DEBUG_9P, "clnt %p afid %d uname %s aname %s\n", + clnt, afid?afid->fid:-1, uname, aname); + err = 0; + tc = NULL; + rc = NULL; + + fid = p9_fid_create(clnt); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + fid = NULL; + goto error; + } + + tc = p9_create_tattach(fid->fid, afid?afid->fid:P9_NOFID, uname, aname); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + memmove(&fid->qid, &rc->params.rattach.qid, sizeof(struct p9_qid)); + kfree(tc); + kfree(rc); + return fid; + +error: + kfree(tc); + kfree(rc); + if (fid) + p9_fid_destroy(fid); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_client_attach); + +struct p9_fid *p9_client_auth(struct p9_client *clnt, char *uname, char *aname) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_fid *fid; + + P9_DPRINTK(P9_DEBUG_9P, "clnt %p uname %s aname %s\n", clnt, uname, + aname); + err = 0; + tc = NULL; + rc = NULL; + + fid = p9_fid_create(clnt); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + fid = NULL; + goto error; + } + + tc = p9_create_tauth(fid->fid, uname, aname); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + memmove(&fid->qid, &rc->params.rauth.qid, sizeof(struct p9_qid)); + kfree(tc); + kfree(rc); + return fid; + +error: + kfree(tc); + kfree(rc); + if (fid) + p9_fid_destroy(fid); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_client_auth); + +struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, + int clone) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + struct p9_fid *fid; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d nwname %d wname[0] %s\n", + oldfid->fid, nwname, wnames?wnames[0]:NULL); + err = 0; + tc = NULL; + rc = NULL; + clnt = oldfid->clnt; + if (clone) { + fid = p9_fid_create(clnt); + if (IS_ERR(fid)) { + err = PTR_ERR(fid); + fid = NULL; + goto error; + } + + fid->uid = oldfid->uid; + } else + fid = oldfid; + + tc = p9_create_twalk(oldfid->fid, fid->fid, nwname, wnames); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) { + if (rc && rc->id == P9_RWALK) + goto clunk_fid; + else + goto error; + } + + if (rc->params.rwalk.nwqid != nwname) { + err = -ENOENT; + goto clunk_fid; + } + + if (nwname) + memmove(&fid->qid, + &rc->params.rwalk.wqids[rc->params.rwalk.nwqid - 1], + sizeof(struct p9_qid)); + else + fid->qid = oldfid->qid; + + kfree(tc); + kfree(rc); + return fid; + +clunk_fid: + kfree(tc); + kfree(rc); + rc = NULL; + tc = p9_create_tclunk(fid->fid); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + p9_conn_rpc(clnt->conn, tc, &rc); + +error: + kfree(tc); + kfree(rc); + if (fid && (fid != oldfid)) + p9_fid_destroy(fid); + + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_client_walk); + +int p9_client_open(struct p9_fid *fid, int mode) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d mode %d\n", fid->fid, mode); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + + if (fid->mode != -1) + return -EINVAL; + + tc = p9_create_topen(fid->fid, mode); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto done; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto done; + + fid->mode = mode; + fid->iounit = rc->params.ropen.iounit; + +done: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_open); + +int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, + char *extension) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d name %s perm %d mode %d\n", fid->fid, + name, perm, mode); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + + if (fid->mode != -1) + return -EINVAL; + + tc = p9_create_tcreate(fid->fid, name, perm, mode, extension, + clnt->dotu); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto done; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto done; + + fid->mode = mode; + fid->iounit = rc->params.ropen.iounit; + +done: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_fcreate); + +int p9_client_clunk(struct p9_fid *fid) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + + tc = p9_create_tclunk(fid->fid); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto done; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto done; + + p9_fid_destroy(fid); + +done: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_clunk); + +int p9_client_remove(struct p9_fid *fid) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + + tc = p9_create_tremove(fid->fid); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto done; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto done; + + p9_fid_destroy(fid); + +done: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_remove); + +int p9_client_read(struct p9_fid *fid, char *data, u64 offset, u32 count) +{ + int err, n, rsize, total; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu %d\n", fid->fid, + (long long unsigned) offset, count); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + total = 0; + + rsize = fid->iounit; + if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) + rsize = clnt->msize - P9_IOHDRSZ; + + do { + if (count < rsize) + rsize = count; + + tc = p9_create_tread(fid->fid, offset, rsize); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + n = rc->params.rread.count; + if (n > count) + n = count; + + memmove(data, rc->params.rread.data, n); + count -= n; + data += n; + offset += n; + total += n; + kfree(tc); + tc = NULL; + kfree(rc); + rc = NULL; + } while (count > 0 && n == rsize); + + return total; + +error: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_read); + +int p9_client_write(struct p9_fid *fid, char *data, u64 offset, u32 count) +{ + int err, n, rsize, total; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid, + (long long unsigned) offset, count); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + total = 0; + + rsize = fid->iounit; + if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) + rsize = clnt->msize - P9_IOHDRSZ; + + do { + if (count < rsize) + rsize = count; + + tc = p9_create_twrite(fid->fid, offset, rsize, data); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + n = rc->params.rread.count; + count -= n; + data += n; + offset += n; + total += n; + kfree(tc); + tc = NULL; + kfree(rc); + rc = NULL; + } while (count > 0); + + return total; + +error: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_write); + +int +p9_client_uread(struct p9_fid *fid, char __user *data, u64 offset, u32 count) +{ + int err, n, rsize, total; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid, + (long long unsigned) offset, count); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + total = 0; + + rsize = fid->iounit; + if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) + rsize = clnt->msize - P9_IOHDRSZ; + + do { + if (count < rsize) + rsize = count; + + tc = p9_create_tread(fid->fid, offset, rsize); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + n = rc->params.rread.count; + if (n > count) + n = count; + + err = copy_to_user(data, rc->params.rread.data, n); + if (err) { + err = -EFAULT; + goto error; + } + + count -= n; + data += n; + offset += n; + total += n; + kfree(tc); + tc = NULL; + kfree(rc); + rc = NULL; + } while (count > 0 && n == rsize); + + return total; + +error: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_uread); + +int +p9_client_uwrite(struct p9_fid *fid, const char __user *data, u64 offset, + u32 count) +{ + int err, n, rsize, total; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid, + (long long unsigned) offset, count); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + total = 0; + + rsize = fid->iounit; + if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) + rsize = clnt->msize - P9_IOHDRSZ; + + do { + if (count < rsize) + rsize = count; + + tc = p9_create_twrite_u(fid->fid, offset, rsize, data); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + n = rc->params.rread.count; + count -= n; + data += n; + offset += n; + total += n; + kfree(tc); + tc = NULL; + kfree(rc); + rc = NULL; + } while (count > 0); + + return total; + +error: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_uwrite); + +int p9_client_readn(struct p9_fid *fid, char *data, u64 offset, u32 count) +{ + int n, total; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid, + (long long unsigned) offset, count); + n = 0; + total = 0; + while (count) { + n = p9_client_read(fid, data, offset, count); + if (n <= 0) + break; + + data += n; + offset += n; + count -= n; + total += n; + } + + if (n < 0) + total = n; + + return total; +} +EXPORT_SYMBOL(p9_client_readn); + +struct p9_stat *p9_client_stat(struct p9_fid *fid) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + struct p9_stat *ret; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid); + err = 0; + tc = NULL; + rc = NULL; + ret = NULL; + clnt = fid->clnt; + + tc = p9_create_tstat(fid->fid); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + ret = p9_clone_stat(&rc->params.rstat.stat, clnt->dotu); + if (IS_ERR(ret)) { + err = PTR_ERR(ret); + ret = NULL; + goto error; + } + + kfree(tc); + kfree(rc); + return ret; + +error: + kfree(tc); + kfree(rc); + kfree(ret); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_client_stat); + +int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) +{ + int err; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid); + err = 0; + tc = NULL; + rc = NULL; + clnt = fid->clnt; + + tc = p9_create_twstat(fid->fid, wst, clnt->dotu); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto done; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + +done: + kfree(tc); + kfree(rc); + return err; +} +EXPORT_SYMBOL(p9_client_wstat); + +struct p9_stat *p9_client_dirread(struct p9_fid *fid, u64 offset) +{ + int err, n, m; + struct p9_fcall *tc, *rc; + struct p9_client *clnt; + struct p9_stat st, *ret; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu\n", fid->fid, + (long long unsigned) offset); + err = 0; + tc = NULL; + rc = NULL; + ret = NULL; + clnt = fid->clnt; + + /* if the offset is below or above the current response, free it */ + if (offset < fid->rdir_fpos || (fid->rdir_fcall && + offset >= fid->rdir_fpos+fid->rdir_fcall->params.rread.count)) { + fid->rdir_pos = 0; + if (fid->rdir_fcall) + fid->rdir_fpos += fid->rdir_fcall->params.rread.count; + + kfree(fid->rdir_fcall); + fid->rdir_fcall = NULL; + if (offset < fid->rdir_fpos) + fid->rdir_fpos = 0; + } + + if (!fid->rdir_fcall) { + n = fid->iounit; + if (!n || n > clnt->msize-P9_IOHDRSZ) + n = clnt->msize - P9_IOHDRSZ; + + while (1) { + if (fid->rdir_fcall) { + fid->rdir_fpos += + fid->rdir_fcall->params.rread.count; + kfree(fid->rdir_fcall); + fid->rdir_fcall = NULL; + } + + tc = p9_create_tread(fid->fid, fid->rdir_fpos, n); + if (IS_ERR(tc)) { + err = PTR_ERR(tc); + tc = NULL; + goto error; + } + + err = p9_conn_rpc(clnt->conn, tc, &rc); + if (err) + goto error; + + n = rc->params.rread.count; + if (n == 0) + goto done; + + fid->rdir_fcall = rc; + rc = NULL; + if (offset >= fid->rdir_fpos && + offset < fid->rdir_fpos+n) + break; + } + + fid->rdir_pos = 0; + } + + m = offset - fid->rdir_fpos; + if (m < 0) + goto done; + + n = p9_deserialize_stat(fid->rdir_fcall->params.rread.data + m, + fid->rdir_fcall->params.rread.count - m, &st, clnt->dotu); + + if (!n) { + err = -EIO; + goto error; + } + + fid->rdir_pos += n; + st.size = n; + ret = p9_clone_stat(&st, clnt->dotu); + if (IS_ERR(ret)) { + err = PTR_ERR(ret); + ret = NULL; + goto error; + } + +done: + kfree(tc); + kfree(rc); + return ret; + +error: + kfree(tc); + kfree(rc); + kfree(ret); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_client_dirread); + +static struct p9_stat *p9_clone_stat(struct p9_stat *st, int dotu) +{ + int n; + char *p; + struct p9_stat *ret; + + n = sizeof(struct p9_stat) + st->name.len + st->uid.len + st->gid.len + + st->muid.len; + + if (dotu) + n += st->extension.len; + + ret = kmalloc(n, GFP_KERNEL); + if (!ret) + return ERR_PTR(-ENOMEM); + + memmove(ret, st, sizeof(struct p9_stat)); + p = ((char *) ret) + sizeof(struct p9_stat); + memmove(p, st->name.str, st->name.len); + p += st->name.len; + memmove(p, st->uid.str, st->uid.len); + p += st->uid.len; + memmove(p, st->gid.str, st->gid.len); + p += st->gid.len; + memmove(p, st->muid.str, st->muid.len); + p += st->muid.len; + + if (dotu) { + memmove(p, st->extension.str, st->extension.len); + p += st->extension.len; + } + + return ret; +} + +static struct p9_fid *p9_fid_create(struct p9_client *clnt) +{ + int err; + struct p9_fid *fid; + + P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); + fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); + if (!fid) + return ERR_PTR(-ENOMEM); + + fid->fid = p9_idpool_get(clnt->fidpool); + if (fid->fid < 0) { + err = -ENOSPC; + goto error; + } + + memset(&fid->qid, 0, sizeof(struct p9_qid)); + fid->mode = -1; + fid->rdir_fpos = 0; + fid->rdir_pos = 0; + fid->rdir_fcall = NULL; + fid->uid = current->fsuid; + fid->clnt = clnt; + fid->aux = NULL; + + spin_lock(&clnt->lock); + list_add(&fid->flist, &clnt->fidlist); + spin_unlock(&clnt->lock); + + return fid; + +error: + kfree(fid); + return ERR_PTR(err); +} + +static void p9_fid_destroy(struct p9_fid *fid) +{ + struct p9_client *clnt; + + P9_DPRINTK(P9_DEBUG_9P, "fid %d\n", fid->fid); + clnt = fid->clnt; + p9_idpool_put(fid->fid, clnt->fidpool); + spin_lock(&clnt->lock); + list_del(&fid->flist); + spin_unlock(&clnt->lock); + kfree(fid->rdir_fcall); + kfree(fid); +} diff --git a/fs/9p/conv.c b/net/9p/conv.c index a3ed571..3745117 100644 --- a/fs/9p/conv.c +++ b/net/9p/conv.c @@ -1,5 +1,5 @@ /* - * linux/fs/9p/conv.c + * net/9p/conv.c * * 9P protocol conversion functions * @@ -29,11 +29,8 @@ #include <linux/fs.h> #include <linux/sched.h> #include <linux/idr.h> -#include <asm/uaccess.h> -#include "debug.h" -#include "v9fs.h" -#include "9p.h" -#include "conv.h" +#include <linux/uaccess.h> +#include <net/9p/9p.h> /* * Buffer to help with string parsing @@ -59,8 +56,9 @@ static int buf_check_size(struct cbuf *buf, int len) { if (buf->p + len > buf->ep) { if (buf->p < buf->ep) { - eprintk(KERN_ERR, "buffer overflow: want %d has %d\n", - len, (int)(buf->ep - buf->p)); + P9_EPRINTK(KERN_ERR, + "buffer overflow: want %d has %d\n", len, + (int)(buf->ep - buf->p)); dump_stack(); buf->p = buf->ep + 1; } @@ -183,7 +181,7 @@ static u64 buf_get_int64(struct cbuf *buf) return ret; } -static void buf_get_str(struct cbuf *buf, struct v9fs_str *vstr) +static void buf_get_str(struct cbuf *buf, struct p9_str *vstr) { vstr->len = buf_get_int16(buf); if (!buf_check_overflow(buf) && buf_check_size(buf, vstr->len)) { @@ -195,7 +193,7 @@ static void buf_get_str(struct cbuf *buf, struct v9fs_str *vstr) } } -static void buf_get_qid(struct cbuf *bufp, struct v9fs_qid *qid) +static void buf_get_qid(struct cbuf *bufp, struct p9_qid *qid) { qid->type = buf_get_int8(bufp); qid->version = buf_get_int32(bufp); @@ -203,18 +201,18 @@ static void buf_get_qid(struct cbuf *bufp, struct v9fs_qid *qid) } /** - * v9fs_size_wstat - calculate the size of a variable length stat struct + * p9_size_wstat - calculate the size of a variable length stat struct * @stat: metadata (stat) structure - * @extended: non-zero if 9P2000.u + * @dotu: non-zero if 9P2000.u * */ -static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended) +static int p9_size_wstat(struct p9_wstat *wstat, int dotu) { int size = 0; if (wstat == NULL) { - eprintk(KERN_ERR, "v9fs_size_stat: got a NULL stat pointer\n"); + P9_EPRINTK(KERN_ERR, "p9_size_stat: got a NULL stat pointer\n"); return 0; } @@ -239,7 +237,7 @@ static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended) if (wstat->muid) size += strlen(wstat->muid); - if (extended) { + if (dotu) { size += 4 + /* n_uid[4] */ 4 + /* n_gid[4] */ 4 + /* n_muid[4] */ @@ -255,12 +253,12 @@ static int v9fs_size_wstat(struct v9fs_wstat *wstat, int extended) * buf_get_stat - safely decode a recieved metadata (stat) structure * @bufp: buffer to deserialize * @stat: metadata (stat) structure - * @extended: non-zero if 9P2000.u + * @dotu: non-zero if 9P2000.u * */ static void -buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended) +buf_get_stat(struct cbuf *bufp, struct p9_stat *stat, int dotu) { stat->size = buf_get_int16(bufp); stat->type = buf_get_int16(bufp); @@ -277,7 +275,7 @@ buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended) buf_get_str(bufp, &stat->gid); buf_get_str(bufp, &stat->muid); - if (extended) { + if (dotu) { buf_get_str(bufp, &stat->extension); stat->n_uid = buf_get_int32(bufp); stat->n_gid = buf_get_int32(bufp); @@ -286,18 +284,18 @@ buf_get_stat(struct cbuf *bufp, struct v9fs_stat *stat, int extended) } /** - * v9fs_deserialize_stat - decode a received metadata structure + * p9_deserialize_stat - decode a received metadata structure * @buf: buffer to deserialize * @buflen: length of received buffer * @stat: metadata structure to decode into - * @extended: non-zero if 9P2000.u + * @dotu: non-zero if 9P2000.u * * Note: stat will point to the buf region. */ int -v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat, - int extended) +p9_deserialize_stat(void *buf, u32 buflen, struct p9_stat *stat, + int dotu) { struct cbuf buffer; struct cbuf *bufp = &buffer; @@ -305,13 +303,14 @@ v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat, buf_init(bufp, buf, buflen); p = bufp->p; - buf_get_stat(bufp, stat, extended); + buf_get_stat(bufp, stat, dotu); if (buf_check_overflow(bufp)) return 0; else return bufp->p - p; } +EXPORT_SYMBOL(p9_deserialize_stat); /** * deserialize_fcall - unmarshal a response @@ -319,13 +318,13 @@ v9fs_deserialize_stat(void *buf, u32 buflen, struct v9fs_stat *stat, * @buflen: length of received buffer * @rcall: fcall structure to populate * @rcalllen: length of fcall structure to populate - * @extended: non-zero if 9P2000.u + * @dotu: non-zero if 9P2000.u * */ int -v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall, - int extended) +p9_deserialize_fcall(void *buf, u32 buflen, struct p9_fcall *rcall, + int dotu) { struct cbuf buffer; @@ -338,102 +337,104 @@ v9fs_deserialize_fcall(void *buf, u32 buflen, struct v9fs_fcall *rcall, rcall->id = buf_get_int8(bufp); rcall->tag = buf_get_int16(bufp); - dprintk(DEBUG_CONV, "size %d id %d tag %d\n", rcall->size, rcall->id, - rcall->tag); + P9_DPRINTK(P9_DEBUG_CONV, "size %d id %d tag %d\n", rcall->size, + rcall->id, rcall->tag); switch (rcall->id) { default: - eprintk(KERN_ERR, "unknown message type: %d\n", rcall->id); + P9_EPRINTK(KERN_ERR, "unknown message type: %d\n", rcall->id); return -EPROTO; - case RVERSION: + case P9_RVERSION: rcall->params.rversion.msize = buf_get_int32(bufp); buf_get_str(bufp, &rcall->params.rversion.version); break; - case RFLUSH: + case P9_RFLUSH: break; - case RATTACH: + case P9_RATTACH: rcall->params.rattach.qid.type = buf_get_int8(bufp); rcall->params.rattach.qid.version = buf_get_int32(bufp); rcall->params.rattach.qid.path = buf_get_int64(bufp); break; - case RWALK: + case P9_RWALK: rcall->params.rwalk.nwqid = buf_get_int16(bufp); - if (rcall->params.rwalk.nwqid > V9FS_MAXWELEM) { - eprintk(KERN_ERR, "Rwalk with more than %d qids: %d\n", - V9FS_MAXWELEM, rcall->params.rwalk.nwqid); + if (rcall->params.rwalk.nwqid > P9_MAXWELEM) { + P9_EPRINTK(KERN_ERR, + "Rwalk with more than %d qids: %d\n", + P9_MAXWELEM, rcall->params.rwalk.nwqid); return -EPROTO; } for (i = 0; i < rcall->params.rwalk.nwqid; i++) buf_get_qid(bufp, &rcall->params.rwalk.wqids[i]); break; - case ROPEN: + case P9_ROPEN: buf_get_qid(bufp, &rcall->params.ropen.qid); rcall->params.ropen.iounit = buf_get_int32(bufp); break; - case RCREATE: + case P9_RCREATE: buf_get_qid(bufp, &rcall->params.rcreate.qid); rcall->params.rcreate.iounit = buf_get_int32(bufp); break; - case RREAD: + case P9_RREAD: rcall->params.rread.count = buf_get_int32(bufp); rcall->params.rread.data = bufp->p; buf_check_size(bufp, rcall->params.rread.count); break; - case RWRITE: + case P9_RWRITE: rcall->params.rwrite.count = buf_get_int32(bufp); break; - case RCLUNK: + case P9_RCLUNK: break; - case RREMOVE: + case P9_RREMOVE: break; - case RSTAT: + case P9_RSTAT: buf_get_int16(bufp); - buf_get_stat(bufp, &rcall->params.rstat.stat, extended); + buf_get_stat(bufp, &rcall->params.rstat.stat, dotu); break; - case RWSTAT: + case P9_RWSTAT: break; - case RERROR: + case P9_RERROR: buf_get_str(bufp, &rcall->params.rerror.error); - if (extended) + if (dotu) rcall->params.rerror.errno = buf_get_int16(bufp); break; } if (buf_check_overflow(bufp)) { - dprintk(DEBUG_ERROR, "buffer overflow\n"); + P9_DPRINTK(P9_DEBUG_ERROR, "buffer overflow\n"); return -EIO; } return bufp->p - bufp->sp; } +EXPORT_SYMBOL(p9_deserialize_fcall); -static inline void v9fs_put_int8(struct cbuf *bufp, u8 val, u8 * p) +static inline void p9_put_int8(struct cbuf *bufp, u8 val, u8 * p) { *p = val; buf_put_int8(bufp, val); } -static inline void v9fs_put_int16(struct cbuf *bufp, u16 val, u16 * p) +static inline void p9_put_int16(struct cbuf *bufp, u16 val, u16 * p) { *p = val; buf_put_int16(bufp, val); } -static inline void v9fs_put_int32(struct cbuf *bufp, u32 val, u32 * p) +static inline void p9_put_int32(struct cbuf *bufp, u32 val, u32 * p) { *p = val; buf_put_int32(bufp, val); } -static inline void v9fs_put_int64(struct cbuf *bufp, u64 val, u64 * p) +static inline void p9_put_int64(struct cbuf *bufp, u64 val, u64 * p) { *p = val; buf_put_int64(bufp, val); } static void -v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str) +p9_put_str(struct cbuf *bufp, char *data, struct p9_str *str) { int len; char *s; @@ -451,7 +452,16 @@ v9fs_put_str(struct cbuf *bufp, char *data, struct v9fs_str *str) } static int -v9fs_put_user_data(struct cbuf *bufp, const char __user * data, int count, +p9_put_data(struct cbuf *bufp, const char *data, int count, + unsigned char **pdata) +{ + *pdata = buf_alloc(bufp, count); + memmove(*pdata, data, count); + return count; +} + +static int +p9_put_user_data(struct cbuf *bufp, const char __user *data, int count, unsigned char **pdata) { *pdata = buf_alloc(bufp, count); @@ -459,162 +469,167 @@ v9fs_put_user_data(struct cbuf *bufp, const char __user * data, int count, } static void -v9fs_put_wstat(struct cbuf *bufp, struct v9fs_wstat *wstat, - struct v9fs_stat *stat, int statsz, int extended) +p9_put_wstat(struct cbuf *bufp, struct p9_wstat *wstat, + struct p9_stat *stat, int statsz, int dotu) { - v9fs_put_int16(bufp, statsz, &stat->size); - v9fs_put_int16(bufp, wstat->type, &stat->type); - v9fs_put_int32(bufp, wstat->dev, &stat->dev); - v9fs_put_int8(bufp, wstat->qid.type, &stat->qid.type); - v9fs_put_int32(bufp, wstat->qid.version, &stat->qid.version); - v9fs_put_int64(bufp, wstat->qid.path, &stat->qid.path); - v9fs_put_int32(bufp, wstat->mode, &stat->mode); - v9fs_put_int32(bufp, wstat->atime, &stat->atime); - v9fs_put_int32(bufp, wstat->mtime, &stat->mtime); - v9fs_put_int64(bufp, wstat->length, &stat->length); + p9_put_int16(bufp, statsz, &stat->size); + p9_put_int16(bufp, wstat->type, &stat->type); + p9_put_int32(bufp, wstat->dev, &stat->dev); + p9_put_int8(bufp, wstat->qid.type, &stat->qid.type); + p9_put_int32(bufp, wstat->qid.version, &stat->qid.version); + p9_put_int64(bufp, wstat->qid.path, &stat->qid.path); + p9_put_int32(bufp, wstat->mode, &stat->mode); + p9_put_int32(bufp, wstat->atime, &stat->atime); + p9_put_int32(bufp, wstat->mtime, &stat->mtime); + p9_put_int64(bufp, wstat->length, &stat->length); - v9fs_put_str(bufp, wstat->name, &stat->name); - v9fs_put_str(bufp, wstat->uid, &stat->uid); - v9fs_put_str(bufp, wstat->gid, &stat->gid); - v9fs_put_str(bufp, wstat->muid, &stat->muid); + p9_put_str(bufp, wstat->name, &stat->name); + p9_put_str(bufp, wstat->uid, &stat->uid); + p9_put_str(bufp, wstat->gid, &stat->gid); + p9_put_str(bufp, wstat->muid, &stat->muid); - if (extended) { - v9fs_put_str(bufp, wstat->extension, &stat->extension); - v9fs_put_int32(bufp, wstat->n_uid, &stat->n_uid); - v9fs_put_int32(bufp, wstat->n_gid, &stat->n_gid); - v9fs_put_int32(bufp, wstat->n_muid, &stat->n_muid); + if (dotu) { + p9_put_str(bufp, wstat->extension, &stat->extension); + p9_put_int32(bufp, wstat->n_uid, &stat->n_uid); + p9_put_int32(bufp, wstat->n_gid, &stat->n_gid); + p9_put_int32(bufp, wstat->n_muid, &stat->n_muid); } } -static struct v9fs_fcall * -v9fs_create_common(struct cbuf *bufp, u32 size, u8 id) +static struct p9_fcall * +p9_create_common(struct cbuf *bufp, u32 size, u8 id) { - struct v9fs_fcall *fc; + struct p9_fcall *fc; size += 4 + 1 + 2; /* size[4] id[1] tag[2] */ - fc = kmalloc(sizeof(struct v9fs_fcall) + size, GFP_KERNEL); + fc = kmalloc(sizeof(struct p9_fcall) + size, GFP_KERNEL); if (!fc) return ERR_PTR(-ENOMEM); fc->sdata = (char *)fc + sizeof(*fc); buf_init(bufp, (char *)fc->sdata, size); - v9fs_put_int32(bufp, size, &fc->size); - v9fs_put_int8(bufp, id, &fc->id); - v9fs_put_int16(bufp, V9FS_NOTAG, &fc->tag); + p9_put_int32(bufp, size, &fc->size); + p9_put_int8(bufp, id, &fc->id); + p9_put_int16(bufp, P9_NOTAG, &fc->tag); return fc; } -void v9fs_set_tag(struct v9fs_fcall *fc, u16 tag) +void p9_set_tag(struct p9_fcall *fc, u16 tag) { fc->tag = tag; *(__le16 *) (fc->sdata + 5) = cpu_to_le16(tag); } +EXPORT_SYMBOL(p9_set_tag); -struct v9fs_fcall *v9fs_create_tversion(u32 msize, char *version) +struct p9_fcall *p9_create_tversion(u32 msize, char *version) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; size = 4 + 2 + strlen(version); /* msize[4] version[s] */ - fc = v9fs_create_common(bufp, size, TVERSION); + fc = p9_create_common(bufp, size, P9_TVERSION); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, msize, &fc->params.tversion.msize); - v9fs_put_str(bufp, version, &fc->params.tversion.version); + p9_put_int32(bufp, msize, &fc->params.tversion.msize); + p9_put_str(bufp, version, &fc->params.tversion.version); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_tversion); -#if 0 -struct v9fs_fcall *v9fs_create_tauth(u32 afid, char *uname, char *aname) +struct p9_fcall *p9_create_tauth(u32 afid, char *uname, char *aname) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; - size = 4 + 2 + strlen(uname) + 2 + strlen(aname); /* afid[4] uname[s] aname[s] */ - fc = v9fs_create_common(bufp, size, TAUTH); + /* afid[4] uname[s] aname[s] */ + size = 4 + 2 + strlen(uname) + 2 + strlen(aname); + fc = p9_create_common(bufp, size, P9_TAUTH); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, afid, &fc->params.tauth.afid); - v9fs_put_str(bufp, uname, &fc->params.tauth.uname); - v9fs_put_str(bufp, aname, &fc->params.tauth.aname); + p9_put_int32(bufp, afid, &fc->params.tauth.afid); + p9_put_str(bufp, uname, &fc->params.tauth.uname); + p9_put_str(bufp, aname, &fc->params.tauth.aname); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } -#endif /* 0 */ +EXPORT_SYMBOL(p9_create_tauth); -struct v9fs_fcall * -v9fs_create_tattach(u32 fid, u32 afid, char *uname, char *aname) +struct p9_fcall * +p9_create_tattach(u32 fid, u32 afid, char *uname, char *aname) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; - size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname); /* fid[4] afid[4] uname[s] aname[s] */ - fc = v9fs_create_common(bufp, size, TATTACH); + /* fid[4] afid[4] uname[s] aname[s] */ + size = 4 + 4 + 2 + strlen(uname) + 2 + strlen(aname); + fc = p9_create_common(bufp, size, P9_TATTACH); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.tattach.fid); - v9fs_put_int32(bufp, afid, &fc->params.tattach.afid); - v9fs_put_str(bufp, uname, &fc->params.tattach.uname); - v9fs_put_str(bufp, aname, &fc->params.tattach.aname); + p9_put_int32(bufp, fid, &fc->params.tattach.fid); + p9_put_int32(bufp, afid, &fc->params.tattach.afid); + p9_put_str(bufp, uname, &fc->params.tattach.uname); + p9_put_str(bufp, aname, &fc->params.tattach.aname); - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_tattach); -struct v9fs_fcall *v9fs_create_tflush(u16 oldtag) +struct p9_fcall *p9_create_tflush(u16 oldtag) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; size = 2; /* oldtag[2] */ - fc = v9fs_create_common(bufp, size, TFLUSH); + fc = p9_create_common(bufp, size, P9_TFLUSH); if (IS_ERR(fc)) goto error; - v9fs_put_int16(bufp, oldtag, &fc->params.tflush.oldtag); + p9_put_int16(bufp, oldtag, &fc->params.tflush.oldtag); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_tflush); -struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname, +struct p9_fcall *p9_create_twalk(u32 fid, u32 newfid, u16 nwname, char **wnames) { int i, size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; - if (nwname > V9FS_MAXWELEM) { - dprintk(DEBUG_ERROR, "nwname > %d\n", V9FS_MAXWELEM); + if (nwname > P9_MAXWELEM) { + P9_DPRINTK(P9_DEBUG_ERROR, "nwname > %d\n", P9_MAXWELEM); return NULL; } @@ -623,122 +638,160 @@ struct v9fs_fcall *v9fs_create_twalk(u32 fid, u32 newfid, u16 nwname, size += 2 + strlen(wnames[i]); /* wname[s] */ } - fc = v9fs_create_common(bufp, size, TWALK); + fc = p9_create_common(bufp, size, P9_TWALK); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.twalk.fid); - v9fs_put_int32(bufp, newfid, &fc->params.twalk.newfid); - v9fs_put_int16(bufp, nwname, &fc->params.twalk.nwname); + p9_put_int32(bufp, fid, &fc->params.twalk.fid); + p9_put_int32(bufp, newfid, &fc->params.twalk.newfid); + p9_put_int16(bufp, nwname, &fc->params.twalk.nwname); for (i = 0; i < nwname; i++) { - v9fs_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]); + p9_put_str(bufp, wnames[i], &fc->params.twalk.wnames[i]); } if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_twalk); -struct v9fs_fcall *v9fs_create_topen(u32 fid, u8 mode) +struct p9_fcall *p9_create_topen(u32 fid, u8 mode) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; size = 4 + 1; /* fid[4] mode[1] */ - fc = v9fs_create_common(bufp, size, TOPEN); + fc = p9_create_common(bufp, size, P9_TOPEN); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.topen.fid); - v9fs_put_int8(bufp, mode, &fc->params.topen.mode); + p9_put_int32(bufp, fid, &fc->params.topen.fid); + p9_put_int8(bufp, mode, &fc->params.topen.mode); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_topen); -struct v9fs_fcall *v9fs_create_tcreate(u32 fid, char *name, u32 perm, u8 mode, - char *extension, int extended) +struct p9_fcall *p9_create_tcreate(u32 fid, char *name, u32 perm, u8 mode, + char *extension, int dotu) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; - size = 4 + 2 + strlen(name) + 4 + 1; /* fid[4] name[s] perm[4] mode[1] */ - if (extended) { + /* fid[4] name[s] perm[4] mode[1] */ + size = 4 + 2 + strlen(name) + 4 + 1; + if (dotu) { size += 2 + /* extension[s] */ (extension == NULL ? 0 : strlen(extension)); } - fc = v9fs_create_common(bufp, size, TCREATE); + fc = p9_create_common(bufp, size, P9_TCREATE); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.tcreate.fid); - v9fs_put_str(bufp, name, &fc->params.tcreate.name); - v9fs_put_int32(bufp, perm, &fc->params.tcreate.perm); - v9fs_put_int8(bufp, mode, &fc->params.tcreate.mode); - if (extended) - v9fs_put_str(bufp, extension, &fc->params.tcreate.extension); + p9_put_int32(bufp, fid, &fc->params.tcreate.fid); + p9_put_str(bufp, name, &fc->params.tcreate.name); + p9_put_int32(bufp, perm, &fc->params.tcreate.perm); + p9_put_int8(bufp, mode, &fc->params.tcreate.mode); + if (dotu) + p9_put_str(bufp, extension, &fc->params.tcreate.extension); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_tcreate); -struct v9fs_fcall *v9fs_create_tread(u32 fid, u64 offset, u32 count) +struct p9_fcall *p9_create_tread(u32 fid, u64 offset, u32 count) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; size = 4 + 8 + 4; /* fid[4] offset[8] count[4] */ - fc = v9fs_create_common(bufp, size, TREAD); + fc = p9_create_common(bufp, size, P9_TREAD); + if (IS_ERR(fc)) + goto error; + + p9_put_int32(bufp, fid, &fc->params.tread.fid); + p9_put_int64(bufp, offset, &fc->params.tread.offset); + p9_put_int32(bufp, count, &fc->params.tread.count); + + if (buf_check_overflow(bufp)) { + kfree(fc); + fc = ERR_PTR(-ENOMEM); + } +error: + return fc; +} +EXPORT_SYMBOL(p9_create_tread); + +struct p9_fcall *p9_create_twrite(u32 fid, u64 offset, u32 count, + const char *data) +{ + int size, err; + struct p9_fcall *fc; + struct cbuf buffer; + struct cbuf *bufp = &buffer; + + /* fid[4] offset[8] count[4] data[count] */ + size = 4 + 8 + 4 + count; + fc = p9_create_common(bufp, size, P9_TWRITE); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.tread.fid); - v9fs_put_int64(bufp, offset, &fc->params.tread.offset); - v9fs_put_int32(bufp, count, &fc->params.tread.count); + p9_put_int32(bufp, fid, &fc->params.twrite.fid); + p9_put_int64(bufp, offset, &fc->params.twrite.offset); + p9_put_int32(bufp, count, &fc->params.twrite.count); + err = p9_put_data(bufp, data, count, &fc->params.twrite.data); + if (err) { + kfree(fc); + fc = ERR_PTR(err); + } if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_twrite); -struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count, - const char __user * data) +struct p9_fcall *p9_create_twrite_u(u32 fid, u64 offset, u32 count, + const char __user *data) { int size, err; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; - size = 4 + 8 + 4 + count; /* fid[4] offset[8] count[4] data[count] */ - fc = v9fs_create_common(bufp, size, TWRITE); + /* fid[4] offset[8] count[4] data[count] */ + size = 4 + 8 + 4 + count; + fc = p9_create_common(bufp, size, P9_TWRITE); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.twrite.fid); - v9fs_put_int64(bufp, offset, &fc->params.twrite.offset); - v9fs_put_int32(bufp, count, &fc->params.twrite.count); - err = v9fs_put_user_data(bufp, data, count, &fc->params.twrite.data); + p9_put_int32(bufp, fid, &fc->params.twrite.fid); + p9_put_int64(bufp, offset, &fc->params.twrite.offset); + p9_put_int32(bufp, count, &fc->params.twrite.count); + err = p9_put_user_data(bufp, data, count, &fc->params.twrite.data); if (err) { kfree(fc); fc = ERR_PTR(err); @@ -748,98 +801,103 @@ struct v9fs_fcall *v9fs_create_twrite(u32 fid, u64 offset, u32 count, kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_twrite_u); -struct v9fs_fcall *v9fs_create_tclunk(u32 fid) +struct p9_fcall *p9_create_tclunk(u32 fid) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; size = 4; /* fid[4] */ - fc = v9fs_create_common(bufp, size, TCLUNK); + fc = p9_create_common(bufp, size, P9_TCLUNK); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.tclunk.fid); + p9_put_int32(bufp, fid, &fc->params.tclunk.fid); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_tclunk); -struct v9fs_fcall *v9fs_create_tremove(u32 fid) +struct p9_fcall *p9_create_tremove(u32 fid) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; size = 4; /* fid[4] */ - fc = v9fs_create_common(bufp, size, TREMOVE); + fc = p9_create_common(bufp, size, P9_TREMOVE); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.tremove.fid); + p9_put_int32(bufp, fid, &fc->params.tremove.fid); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_tremove); -struct v9fs_fcall *v9fs_create_tstat(u32 fid) +struct p9_fcall *p9_create_tstat(u32 fid) { int size; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; size = 4; /* fid[4] */ - fc = v9fs_create_common(bufp, size, TSTAT); + fc = p9_create_common(bufp, size, P9_TSTAT); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.tstat.fid); + p9_put_int32(bufp, fid, &fc->params.tstat.fid); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_tstat); -struct v9fs_fcall *v9fs_create_twstat(u32 fid, struct v9fs_wstat *wstat, - int extended) +struct p9_fcall *p9_create_twstat(u32 fid, struct p9_wstat *wstat, + int dotu) { int size, statsz; - struct v9fs_fcall *fc; + struct p9_fcall *fc; struct cbuf buffer; struct cbuf *bufp = &buffer; - statsz = v9fs_size_wstat(wstat, extended); + statsz = p9_size_wstat(wstat, dotu); size = 4 + 2 + 2 + statsz; /* fid[4] stat[n] */ - fc = v9fs_create_common(bufp, size, TWSTAT); + fc = p9_create_common(bufp, size, P9_TWSTAT); if (IS_ERR(fc)) goto error; - v9fs_put_int32(bufp, fid, &fc->params.twstat.fid); + p9_put_int32(bufp, fid, &fc->params.twstat.fid); buf_put_int16(bufp, statsz + 2); - v9fs_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, extended); + p9_put_wstat(bufp, wstat, &fc->params.twstat.stat, statsz, dotu); if (buf_check_overflow(bufp)) { kfree(fc); fc = ERR_PTR(-ENOMEM); } - error: +error: return fc; } +EXPORT_SYMBOL(p9_create_twstat); diff --git a/fs/9p/error.h b/net/9p/error.c index 5f3ca52..ab2458b 100644 --- a/fs/9p/error.h +++ b/net/9p/error.c @@ -1,12 +1,11 @@ /* - * linux/fs/9p/error.h + * linux/fs/9p/error.c * - * Huge Nasty Error Table + * Error string handling * - * Plan 9 uses error strings, Unix uses error numbers. This table tries to - * match UNIX strings and Plan 9 strings to unix error numbers. It is used - * to preload the dynamic error table which can also track user-specific error - * strings. + * Plan 9 uses error strings, Unix uses error numbers. These functions + * try to help manage that and provide for dynamically adding error + * mappings. * * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> @@ -28,8 +27,11 @@ * */ +#include <linux/module.h> +#include <linux/list.h> +#include <linux/jhash.h> #include <linux/errno.h> -#include <asm/errno.h> +#include <net/9p/9p.h> struct errormap { char *name; @@ -174,4 +176,65 @@ static struct errormap errmap[] = { {NULL, -1} }; -extern int v9fs_error_init(void); +/** + * p9_error_init - preload + * @errstr: error string + * + */ + +int p9_error_init(void) +{ + struct errormap *c; + int bucket; + + /* initialize hash table */ + for (bucket = 0; bucket < ERRHASHSZ; bucket++) + INIT_HLIST_HEAD(&hash_errmap[bucket]); + + /* load initial error map into hash table */ + for (c = errmap; c->name != NULL; c++) { + c->namelen = strlen(c->name); + bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ; + INIT_HLIST_NODE(&c->list); + hlist_add_head(&c->list, &hash_errmap[bucket]); + } + + return 1; +} +EXPORT_SYMBOL(p9_error_init); + +/** + * errstr2errno - convert error string to error number + * @errstr: error string + * + */ + +int p9_errstr2errno(char *errstr, int len) +{ + int errno; + struct hlist_node *p; + struct errormap *c; + int bucket; + + errno = 0; + p = NULL; + c = NULL; + bucket = jhash(errstr, len, 0) % ERRHASHSZ; + hlist_for_each_entry(c, p, &hash_errmap[bucket], list) { + if (c->namelen == len && !memcmp(c->name, errstr, len)) { + errno = c->val; + break; + } + } + + if (errno == 0) { + /* TODO: if error isn't found, add it dynamically */ + errstr[len] = 0; + printk(KERN_ERR "%s: errstr :%s: not found\n", __FUNCTION__, + errstr); + errno = 1; + } + + return -errno; +} +EXPORT_SYMBOL(p9_errstr2errno); diff --git a/fs/9p/fcprint.c b/net/9p/fcprint.c index 34b9611..b1ae8ec 100644 --- a/fs/9p/fcprint.c +++ b/net/9p/fcprint.c @@ -1,5 +1,5 @@ /* - * linux/fs/9p/fcprint.c + * net/9p/fcprint.c * * Print 9P call. * @@ -25,61 +25,59 @@ #include <linux/errno.h> #include <linux/fs.h> #include <linux/idr.h> +#include <net/9p/9p.h> -#include "debug.h" -#include "v9fs.h" -#include "9p.h" -#include "mux.h" +#ifdef CONFIG_NET_9P_DEBUG static int -v9fs_printqid(char *buf, int buflen, struct v9fs_qid *q) +p9_printqid(char *buf, int buflen, struct p9_qid *q) { int n; char b[10]; n = 0; - if (q->type & V9FS_QTDIR) + if (q->type & P9_QTDIR) b[n++] = 'd'; - if (q->type & V9FS_QTAPPEND) + if (q->type & P9_QTAPPEND) b[n++] = 'a'; - if (q->type & V9FS_QTAUTH) + if (q->type & P9_QTAUTH) b[n++] = 'A'; - if (q->type & V9FS_QTEXCL) + if (q->type & P9_QTEXCL) b[n++] = 'l'; - if (q->type & V9FS_QTTMP) + if (q->type & P9_QTTMP) b[n++] = 't'; - if (q->type & V9FS_QTSYMLINK) + if (q->type & P9_QTSYMLINK) b[n++] = 'L'; b[n] = '\0'; - return scnprintf(buf, buflen, "(%.16llx %x %s)", (long long int) q->path, - q->version, b); + return scnprintf(buf, buflen, "(%.16llx %x %s)", + (long long int) q->path, q->version, b); } static int -v9fs_printperm(char *buf, int buflen, int perm) +p9_printperm(char *buf, int buflen, int perm) { int n; char b[15]; n = 0; - if (perm & V9FS_DMDIR) + if (perm & P9_DMDIR) b[n++] = 'd'; - if (perm & V9FS_DMAPPEND) + if (perm & P9_DMAPPEND) b[n++] = 'a'; - if (perm & V9FS_DMAUTH) + if (perm & P9_DMAUTH) b[n++] = 'A'; - if (perm & V9FS_DMEXCL) + if (perm & P9_DMEXCL) b[n++] = 'l'; - if (perm & V9FS_DMTMP) + if (perm & P9_DMTMP) b[n++] = 't'; - if (perm & V9FS_DMDEVICE) + if (perm & P9_DMDEVICE) b[n++] = 'D'; - if (perm & V9FS_DMSOCKET) + if (perm & P9_DMSOCKET) b[n++] = 'S'; - if (perm & V9FS_DMNAMEDPIPE) + if (perm & P9_DMNAMEDPIPE) b[n++] = 'P'; - if (perm & V9FS_DMSYMLINK) + if (perm & P9_DMSYMLINK) b[n++] = 'L'; b[n] = '\0'; @@ -87,7 +85,7 @@ v9fs_printperm(char *buf, int buflen, int perm) } static int -v9fs_printstat(char *buf, int buflen, struct v9fs_stat *st, int extended) +p9_printstat(char *buf, int buflen, struct p9_stat *st, int extended) { int n; @@ -105,9 +103,9 @@ v9fs_printstat(char *buf, int buflen, struct v9fs_stat *st, int extended) n += scnprintf(buf+n, buflen-n, "(%d)", st->n_muid); n += scnprintf(buf+n, buflen-n, " q "); - n += v9fs_printqid(buf+n, buflen-n, &st->qid); + n += p9_printqid(buf+n, buflen-n, &st->qid); n += scnprintf(buf+n, buflen-n, " m "); - n += v9fs_printperm(buf+n, buflen-n, st->mode); + n += p9_printperm(buf+n, buflen-n, st->mode); n += scnprintf(buf+n, buflen-n, " at %d mt %d l %lld", st->atime, st->mtime, (long long int) st->length); @@ -119,7 +117,7 @@ v9fs_printstat(char *buf, int buflen, struct v9fs_stat *st, int extended) } static int -v9fs_dumpdata(char *buf, int buflen, u8 *data, int datalen) +p9_dumpdata(char *buf, int buflen, u8 *data, int datalen) { int i, n; @@ -139,13 +137,13 @@ v9fs_dumpdata(char *buf, int buflen, u8 *data, int datalen) } static int -v9fs_printdata(char *buf, int buflen, u8 *data, int datalen) +p9_printdata(char *buf, int buflen, u8 *data, int datalen) { - return v9fs_dumpdata(buf, buflen, data, datalen<16?datalen:16); + return p9_dumpdata(buf, buflen, data, datalen < 16?datalen:16); } int -v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended) +p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended) { int i, ret, type, tag; @@ -157,21 +155,23 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended) ret = 0; switch (type) { - case TVERSION: + case P9_TVERSION: ret += scnprintf(buf+ret, buflen-ret, - "Tversion tag %u msize %u version '%.*s'", tag, - fc->params.tversion.msize, fc->params.tversion.version.len, - fc->params.tversion.version.str); + "Tversion tag %u msize %u version '%.*s'", tag, + fc->params.tversion.msize, + fc->params.tversion.version.len, + fc->params.tversion.version.str); break; - case RVERSION: + case P9_RVERSION: ret += scnprintf(buf+ret, buflen-ret, - "Rversion tag %u msize %u version '%.*s'", tag, - fc->params.rversion.msize, fc->params.rversion.version.len, - fc->params.rversion.version.str); + "Rversion tag %u msize %u version '%.*s'", tag, + fc->params.rversion.msize, + fc->params.rversion.version.len, + fc->params.rversion.version.str); break; - case TAUTH: + case P9_TAUTH: ret += scnprintf(buf+ret, buflen-ret, "Tauth tag %u afid %d uname '%.*s' aname '%.*s'", tag, fc->params.tauth.afid, fc->params.tauth.uname.len, @@ -179,93 +179,97 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended) fc->params.tauth.aname.str); break; - case RAUTH: + case P9_RAUTH: ret += scnprintf(buf+ret, buflen-ret, "Rauth tag %u qid ", tag); - v9fs_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid); + p9_printqid(buf+ret, buflen-ret, &fc->params.rauth.qid); break; - case TATTACH: + case P9_TATTACH: ret += scnprintf(buf+ret, buflen-ret, - "Tattach tag %u fid %d afid %d uname '%.*s' aname '%.*s'", - tag, fc->params.tattach.fid, fc->params.tattach.afid, - fc->params.tattach.uname.len, fc->params.tattach.uname.str, - fc->params.tattach.aname.len, fc->params.tattach.aname.str); + "Tattach tag %u fid %d afid %d uname '%.*s' aname '%.*s'", tag, + fc->params.tattach.fid, fc->params.tattach.afid, + fc->params.tattach.uname.len, fc->params.tattach.uname.str, + fc->params.tattach.aname.len, fc->params.tattach.aname.str); break; - case RATTACH: - ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ", tag); - v9fs_printqid(buf+ret, buflen-ret, &fc->params.rattach.qid); + case P9_RATTACH: + ret += scnprintf(buf+ret, buflen-ret, "Rattach tag %u qid ", + tag); + p9_printqid(buf+ret, buflen-ret, &fc->params.rattach.qid); break; - case RERROR: - ret += scnprintf(buf+ret, buflen-ret, "Rerror tag %u ename '%.*s'", - tag, fc->params.rerror.error.len, - fc->params.rerror.error.str); + case P9_RERROR: + ret += scnprintf(buf+ret, buflen-ret, + "Rerror tag %u ename '%.*s'", tag, + fc->params.rerror.error.len, + fc->params.rerror.error.str); if (extended) ret += scnprintf(buf+ret, buflen-ret, " ecode %d\n", fc->params.rerror.errno); break; - case TFLUSH: + case P9_TFLUSH: ret += scnprintf(buf+ret, buflen-ret, "Tflush tag %u oldtag %u", tag, fc->params.tflush.oldtag); break; - case RFLUSH: + case P9_RFLUSH: ret += scnprintf(buf+ret, buflen-ret, "Rflush tag %u", tag); break; - case TWALK: + case P9_TWALK: ret += scnprintf(buf+ret, buflen-ret, "Twalk tag %u fid %d newfid %d nwname %d", tag, fc->params.twalk.fid, fc->params.twalk.newfid, fc->params.twalk.nwname); - for(i = 0; i < fc->params.twalk.nwname; i++) - ret += scnprintf(buf+ret, buflen-ret," '%.*s'", + for (i = 0; i < fc->params.twalk.nwname; i++) + ret += scnprintf(buf+ret, buflen-ret, " '%.*s'", fc->params.twalk.wnames[i].len, fc->params.twalk.wnames[i].str); break; - case RWALK: + case P9_RWALK: ret += scnprintf(buf+ret, buflen-ret, "Rwalk tag %u nwqid %d", tag, fc->params.rwalk.nwqid); - for(i = 0; i < fc->params.rwalk.nwqid; i++) - ret += v9fs_printqid(buf+ret, buflen-ret, + for (i = 0; i < fc->params.rwalk.nwqid; i++) + ret += p9_printqid(buf+ret, buflen-ret, &fc->params.rwalk.wqids[i]); break; - case TOPEN: + case P9_TOPEN: ret += scnprintf(buf+ret, buflen-ret, "Topen tag %u fid %d mode %d", tag, fc->params.topen.fid, fc->params.topen.mode); break; - case ROPEN: + case P9_ROPEN: ret += scnprintf(buf+ret, buflen-ret, "Ropen tag %u", tag); - ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid); - ret += scnprintf(buf+ret, buflen-ret," iounit %d", + ret += p9_printqid(buf+ret, buflen-ret, &fc->params.ropen.qid); + ret += scnprintf(buf+ret, buflen-ret, " iounit %d", fc->params.ropen.iounit); break; - case TCREATE: + case P9_TCREATE: ret += scnprintf(buf+ret, buflen-ret, "Tcreate tag %u fid %d name '%.*s' perm ", tag, fc->params.tcreate.fid, fc->params.tcreate.name.len, fc->params.tcreate.name.str); - ret += v9fs_printperm(buf+ret, buflen-ret, fc->params.tcreate.perm); + ret += p9_printperm(buf+ret, buflen-ret, + fc->params.tcreate.perm); ret += scnprintf(buf+ret, buflen-ret, " mode %d", fc->params.tcreate.mode); break; - case RCREATE: + case P9_RCREATE: ret += scnprintf(buf+ret, buflen-ret, "Rcreate tag %u", tag); - ret += v9fs_printqid(buf+ret, buflen-ret, &fc->params.rcreate.qid); + ret += p9_printqid(buf+ret, buflen-ret, + &fc->params.rcreate.qid); ret += scnprintf(buf+ret, buflen-ret, " iounit %d", fc->params.rcreate.iounit); break; - case TREAD: + case P9_TREAD: ret += scnprintf(buf+ret, buflen-ret, "Tread tag %u fid %d offset %lld count %u", tag, fc->params.tread.fid, @@ -273,66 +277,66 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended) fc->params.tread.count); break; - case RREAD: + case P9_RREAD: ret += scnprintf(buf+ret, buflen-ret, "Rread tag %u count %u data ", tag, fc->params.rread.count); - ret += v9fs_printdata(buf+ret, buflen-ret, fc->params.rread.data, + ret += p9_printdata(buf+ret, buflen-ret, fc->params.rread.data, fc->params.rread.count); break; - case TWRITE: + case P9_TWRITE: ret += scnprintf(buf+ret, buflen-ret, "Twrite tag %u fid %d offset %lld count %u data ", tag, fc->params.twrite.fid, (long long int) fc->params.twrite.offset, fc->params.twrite.count); - ret += v9fs_printdata(buf+ret, buflen-ret, fc->params.twrite.data, + ret += p9_printdata(buf+ret, buflen-ret, fc->params.twrite.data, fc->params.twrite.count); break; - case RWRITE: + case P9_RWRITE: ret += scnprintf(buf+ret, buflen-ret, "Rwrite tag %u count %u", tag, fc->params.rwrite.count); break; - case TCLUNK: + case P9_TCLUNK: ret += scnprintf(buf+ret, buflen-ret, "Tclunk tag %u fid %d", tag, fc->params.tclunk.fid); break; - case RCLUNK: + case P9_RCLUNK: ret += scnprintf(buf+ret, buflen-ret, "Rclunk tag %u", tag); break; - case TREMOVE: + case P9_TREMOVE: ret += scnprintf(buf+ret, buflen-ret, "Tremove tag %u fid %d", tag, fc->params.tremove.fid); break; - case RREMOVE: + case P9_RREMOVE: ret += scnprintf(buf+ret, buflen-ret, "Rremove tag %u", tag); break; - case TSTAT: + case P9_TSTAT: ret += scnprintf(buf+ret, buflen-ret, "Tstat tag %u fid %d", tag, fc->params.tstat.fid); break; - case RSTAT: + case P9_RSTAT: ret += scnprintf(buf+ret, buflen-ret, "Rstat tag %u ", tag); - ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat, + ret += p9_printstat(buf+ret, buflen-ret, &fc->params.rstat.stat, extended); break; - case TWSTAT: + case P9_TWSTAT: ret += scnprintf(buf+ret, buflen-ret, "Twstat tag %u fid %d ", tag, fc->params.twstat.fid); - ret += v9fs_printstat(buf+ret, buflen-ret, &fc->params.twstat.stat, - extended); + ret += p9_printstat(buf+ret, buflen-ret, + &fc->params.twstat.stat, extended); break; - case RWSTAT: + case P9_RWSTAT: ret += scnprintf(buf+ret, buflen-ret, "Rwstat tag %u", tag); break; @@ -343,3 +347,12 @@ v9fs_printfcall(char *buf, int buflen, struct v9fs_fcall *fc, int extended) return ret; } + +#else +int +p9_printfcall(char *buf, int buflen, struct p9_fcall *fc, int extended) +{ + return 0; +} +EXPORT_SYMBOL(p9_printfcall); +#endif /* CONFIG_NET_9P_DEBUG */ diff --git a/net/9p/mod.c b/net/9p/mod.c new file mode 100644 index 0000000..4f9e1d2 --- /dev/null +++ b/net/9p/mod.c @@ -0,0 +1,85 @@ +/* + * net/9p/9p.c + * + * 9P entry point + * + * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> + * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> + * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <net/9p/9p.h> + +#ifdef CONFIG_NET_9P_DEBUG +unsigned int p9_debug_level = 0; /* feature-rific global debug level */ +EXPORT_SYMBOL(p9_debug_level); +module_param_named(debug, p9_debug_level, uint, 0); +MODULE_PARM_DESC(debug, "9P debugging level"); +#endif + +extern int p9_mux_global_init(void); +extern void p9_mux_global_exit(void); +extern int p9_sysctl_register(void); +extern void p9_sysctl_unregister(void); + +/** + * v9fs_init - Initialize module + * + */ +static int __init init_p9(void) +{ + int ret; + + p9_error_init(); + printk(KERN_INFO "Installing 9P2000 support\n"); + ret = p9_mux_global_init(); + if (ret) { + printk(KERN_WARNING "9p: starting mux failed\n"); + return ret; + } + + ret = p9_sysctl_register(); + if (ret) { + printk(KERN_WARNING "9p: registering sysctl failed\n"); + return ret; + } + + return ret; +} + +/** + * v9fs_init - shutdown module + * + */ + +static void __exit exit_p9(void) +{ + p9_sysctl_unregister(); + p9_mux_global_exit(); +} + +module_init(init_p9) +module_exit(exit_p9) + +MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>"); +MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>"); +MODULE_AUTHOR("Ron Minnich <rminnich@lanl.gov>"); +MODULE_LICENSE("GPL"); diff --git a/fs/9p/mux.c b/net/9p/mux.c index c783874..c3aa87b 100644 --- a/fs/9p/mux.c +++ b/net/9p/mux.c @@ -1,5 +1,5 @@ /* - * linux/fs/9p/mux.c + * net/9p/mux.c * * Protocol Multiplexer * @@ -30,13 +30,9 @@ #include <linux/kthread.h> #include <linux/idr.h> #include <linux/mutex.h> - -#include "debug.h" -#include "v9fs.h" -#include "9p.h" -#include "conv.h" -#include "transport.h" -#include "mux.h" +#include <net/9p/9p.h> +#include <net/9p/transport.h> +#include <net/9p/conn.h> #define ERREQFLUSH 1 #define SCHED_TIMEOUT 10 @@ -55,33 +51,33 @@ enum { Flushed, }; -struct v9fs_mux_poll_task; +struct p9_mux_poll_task; -struct v9fs_req { - spinlock_t lock; +struct p9_req { + spinlock_t lock; /* protect request structure */ int tag; - struct v9fs_fcall *tcall; - struct v9fs_fcall *rcall; + struct p9_fcall *tcall; + struct p9_fcall *rcall; int err; - v9fs_mux_req_callback cb; + p9_conn_req_callback cb; void *cba; int flush; struct list_head req_list; }; -struct v9fs_mux_data { - spinlock_t lock; +struct p9_conn { + spinlock_t lock; /* protect lock structure */ struct list_head mux_list; - struct v9fs_mux_poll_task *poll_task; + struct p9_mux_poll_task *poll_task; int msize; unsigned char *extended; - struct v9fs_transport *trans; - struct v9fs_idpool tagpool; + struct p9_transport *trans; + struct p9_idpool *tagpool; int err; wait_queue_head_t equeue; struct list_head req_list; struct list_head unsent_req_list; - struct v9fs_fcall *rcall; + struct p9_fcall *rcall; int rpos; char *rbuf; int wpos; @@ -95,44 +91,44 @@ struct v9fs_mux_data { unsigned long wsched; }; -struct v9fs_mux_poll_task { +struct p9_mux_poll_task { struct task_struct *task; struct list_head mux_list; int muxnum; }; -struct v9fs_mux_rpc { - struct v9fs_mux_data *m; +struct p9_mux_rpc { + struct p9_conn *m; int err; - struct v9fs_fcall *tcall; - struct v9fs_fcall *rcall; + struct p9_fcall *tcall; + struct p9_fcall *rcall; wait_queue_head_t wqueue; }; -static int v9fs_poll_proc(void *); -static void v9fs_read_work(struct work_struct *work); -static void v9fs_write_work(struct work_struct *work); -static void v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address, +static int p9_poll_proc(void *); +static void p9_read_work(struct work_struct *work); +static void p9_write_work(struct work_struct *work); +static void p9_pollwait(struct file *filp, wait_queue_head_t *wait_address, poll_table * p); -static u16 v9fs_mux_get_tag(struct v9fs_mux_data *); -static void v9fs_mux_put_tag(struct v9fs_mux_data *, u16); +static u16 p9_mux_get_tag(struct p9_conn *); +static void p9_mux_put_tag(struct p9_conn *, u16); -static DEFINE_MUTEX(v9fs_mux_task_lock); -static struct workqueue_struct *v9fs_mux_wq; +static DEFINE_MUTEX(p9_mux_task_lock); +static struct workqueue_struct *p9_mux_wq; -static int v9fs_mux_num; -static int v9fs_mux_poll_task_num; -static struct v9fs_mux_poll_task v9fs_mux_poll_tasks[100]; +static int p9_mux_num; +static int p9_mux_poll_task_num; +static struct p9_mux_poll_task p9_mux_poll_tasks[100]; -int v9fs_mux_global_init(void) +int p9_mux_global_init(void) { int i; - for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) - v9fs_mux_poll_tasks[i].task = NULL; + for (i = 0; i < ARRAY_SIZE(p9_mux_poll_tasks); i++) + p9_mux_poll_tasks[i].task = NULL; - v9fs_mux_wq = create_workqueue("v9fs"); - if (!v9fs_mux_wq) { + p9_mux_wq = create_workqueue("v9fs"); + if (!p9_mux_wq) { printk(KERN_WARNING "v9fs: mux: creating workqueue failed\n"); return -ENOMEM; } @@ -140,114 +136,117 @@ int v9fs_mux_global_init(void) return 0; } -void v9fs_mux_global_exit(void) +void p9_mux_global_exit(void) { - destroy_workqueue(v9fs_mux_wq); + destroy_workqueue(p9_mux_wq); } /** - * v9fs_mux_calc_poll_procs - calculates the number of polling procs + * p9_mux_calc_poll_procs - calculates the number of polling procs * based on the number of mounted v9fs filesystems. * * The current implementation returns sqrt of the number of mounts. */ -static int v9fs_mux_calc_poll_procs(int muxnum) +static int p9_mux_calc_poll_procs(int muxnum) { int n; - if (v9fs_mux_poll_task_num) - n = muxnum / v9fs_mux_poll_task_num + - (muxnum % v9fs_mux_poll_task_num ? 1 : 0); + if (p9_mux_poll_task_num) + n = muxnum / p9_mux_poll_task_num + + (muxnum % p9_mux_poll_task_num ? 1 : 0); else n = 1; - if (n > ARRAY_SIZE(v9fs_mux_poll_tasks)) - n = ARRAY_SIZE(v9fs_mux_poll_tasks); + if (n > ARRAY_SIZE(p9_mux_poll_tasks)) + n = ARRAY_SIZE(p9_mux_poll_tasks); return n; } -static int v9fs_mux_poll_start(struct v9fs_mux_data *m) +static int p9_mux_poll_start(struct p9_conn *m) { int i, n; - struct v9fs_mux_poll_task *vpt, *vptlast; + struct p9_mux_poll_task *vpt, *vptlast; struct task_struct *pproc; - dprintk(DEBUG_MUX, "mux %p muxnum %d procnum %d\n", m, v9fs_mux_num, - v9fs_mux_poll_task_num); - mutex_lock(&v9fs_mux_task_lock); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p muxnum %d procnum %d\n", m, p9_mux_num, + p9_mux_poll_task_num); + mutex_lock(&p9_mux_task_lock); - n = v9fs_mux_calc_poll_procs(v9fs_mux_num + 1); - if (n > v9fs_mux_poll_task_num) { - for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) { - if (v9fs_mux_poll_tasks[i].task == NULL) { - vpt = &v9fs_mux_poll_tasks[i]; - dprintk(DEBUG_MUX, "create proc %p\n", vpt); - pproc = kthread_create(v9fs_poll_proc, vpt, - "v9fs-poll"); + n = p9_mux_calc_poll_procs(p9_mux_num + 1); + if (n > p9_mux_poll_task_num) { + for (i = 0; i < ARRAY_SIZE(p9_mux_poll_tasks); i++) { + if (p9_mux_poll_tasks[i].task == NULL) { + vpt = &p9_mux_poll_tasks[i]; + P9_DPRINTK(P9_DEBUG_MUX, "create proc %p\n", + vpt); + pproc = kthread_create(p9_poll_proc, vpt, + "v9fs-poll"); if (!IS_ERR(pproc)) { vpt->task = pproc; INIT_LIST_HEAD(&vpt->mux_list); vpt->muxnum = 0; - v9fs_mux_poll_task_num++; + p9_mux_poll_task_num++; wake_up_process(vpt->task); } break; } } - if (i >= ARRAY_SIZE(v9fs_mux_poll_tasks)) - dprintk(DEBUG_ERROR, "warning: no free poll slots\n"); + if (i >= ARRAY_SIZE(p9_mux_poll_tasks)) + P9_DPRINTK(P9_DEBUG_ERROR, + "warning: no free poll slots\n"); } - n = (v9fs_mux_num + 1) / v9fs_mux_poll_task_num + - ((v9fs_mux_num + 1) % v9fs_mux_poll_task_num ? 1 : 0); + n = (p9_mux_num + 1) / p9_mux_poll_task_num + + ((p9_mux_num + 1) % p9_mux_poll_task_num ? 1 : 0); vptlast = NULL; - for (i = 0; i < ARRAY_SIZE(v9fs_mux_poll_tasks); i++) { - vpt = &v9fs_mux_poll_tasks[i]; + for (i = 0; i < ARRAY_SIZE(p9_mux_poll_tasks); i++) { + vpt = &p9_mux_poll_tasks[i]; if (vpt->task != NULL) { vptlast = vpt; if (vpt->muxnum < n) { - dprintk(DEBUG_MUX, "put in proc %d\n", i); + P9_DPRINTK(P9_DEBUG_MUX, "put in proc %d\n", i); list_add(&m->mux_list, &vpt->mux_list); vpt->muxnum++; m->poll_task = vpt; - memset(&m->poll_waddr, 0, sizeof(m->poll_waddr)); - init_poll_funcptr(&m->pt, v9fs_pollwait); + memset(&m->poll_waddr, 0, + sizeof(m->poll_waddr)); + init_poll_funcptr(&m->pt, p9_pollwait); break; } } } - if (i >= ARRAY_SIZE(v9fs_mux_poll_tasks)) { + if (i >= ARRAY_SIZE(p9_mux_poll_tasks)) { if (vptlast == NULL) return -ENOMEM; - dprintk(DEBUG_MUX, "put in proc %d\n", i); + P9_DPRINTK(P9_DEBUG_MUX, "put in proc %d\n", i); list_add(&m->mux_list, &vptlast->mux_list); vptlast->muxnum++; m->poll_task = vptlast; memset(&m->poll_waddr, 0, sizeof(m->poll_waddr)); - init_poll_funcptr(&m->pt, v9fs_pollwait); + init_poll_funcptr(&m->pt, p9_pollwait); } - v9fs_mux_num++; - mutex_unlock(&v9fs_mux_task_lock); + p9_mux_num++; + mutex_unlock(&p9_mux_task_lock); return 0; } -static void v9fs_mux_poll_stop(struct v9fs_mux_data *m) +static void p9_mux_poll_stop(struct p9_conn *m) { int i; - struct v9fs_mux_poll_task *vpt; + struct p9_mux_poll_task *vpt; - mutex_lock(&v9fs_mux_task_lock); + mutex_lock(&p9_mux_task_lock); vpt = m->poll_task; list_del(&m->mux_list); - for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) { + for (i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) { if (m->poll_waddr[i] != NULL) { remove_wait_queue(m->poll_waddr[i], &m->poll_wait[i]); m->poll_waddr[i] = NULL; @@ -255,31 +254,31 @@ static void v9fs_mux_poll_stop(struct v9fs_mux_data *m) } vpt->muxnum--; if (!vpt->muxnum) { - dprintk(DEBUG_MUX, "destroy proc %p\n", vpt); + P9_DPRINTK(P9_DEBUG_MUX, "destroy proc %p\n", vpt); kthread_stop(vpt->task); vpt->task = NULL; - v9fs_mux_poll_task_num--; + p9_mux_poll_task_num--; } - v9fs_mux_num--; - mutex_unlock(&v9fs_mux_task_lock); + p9_mux_num--; + mutex_unlock(&p9_mux_task_lock); } /** - * v9fs_mux_init - allocate and initialize the per-session mux data + * p9_conn_create - allocate and initialize the per-session mux data * Creates the polling task if this is the first session. * * @trans - transport structure * @msize - maximum message size * @extended - pointer to the extended flag */ -struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize, +struct p9_conn *p9_conn_create(struct p9_transport *trans, int msize, unsigned char *extended) { int i, n; - struct v9fs_mux_data *m, *mtmp; + struct p9_conn *m, *mtmp; - dprintk(DEBUG_MUX, "transport %p msize %d\n", trans, msize); - m = kmalloc(sizeof(struct v9fs_mux_data), GFP_KERNEL); + P9_DPRINTK(P9_DEBUG_MUX, "transport %p msize %d\n", trans, msize); + m = kmalloc(sizeof(struct p9_conn), GFP_KERNEL); if (!m) return ERR_PTR(-ENOMEM); @@ -288,8 +287,12 @@ struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize, m->msize = msize; m->extended = extended; m->trans = trans; - idr_init(&m->tagpool.pool); - init_MUTEX(&m->tagpool.lock); + m->tagpool = p9_idpool_create(); + if (!m->tagpool) { + kfree(m); + return ERR_PTR(PTR_ERR(m->tagpool)); + } + m->err = 0; init_waitqueue_head(&m->equeue); INIT_LIST_HEAD(&m->req_list); @@ -299,29 +302,29 @@ struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize, m->rbuf = NULL; m->wpos = m->wsize = 0; m->wbuf = NULL; - INIT_WORK(&m->rq, v9fs_read_work); - INIT_WORK(&m->wq, v9fs_write_work); + INIT_WORK(&m->rq, p9_read_work); + INIT_WORK(&m->wq, p9_write_work); m->wsched = 0; memset(&m->poll_waddr, 0, sizeof(m->poll_waddr)); m->poll_task = NULL; - n = v9fs_mux_poll_start(m); + n = p9_mux_poll_start(m); if (n) return ERR_PTR(n); n = trans->poll(trans, &m->pt); if (n & POLLIN) { - dprintk(DEBUG_MUX, "mux %p can read\n", m); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p can read\n", m); set_bit(Rpending, &m->wsched); } if (n & POLLOUT) { - dprintk(DEBUG_MUX, "mux %p can write\n", m); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p can write\n", m); set_bit(Wpending, &m->wsched); } - for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) { + for (i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) { if (IS_ERR(m->poll_waddr[i])) { - v9fs_mux_poll_stop(m); + p9_mux_poll_stop(m); mtmp = (void *)m->poll_waddr; /* the error code */ kfree(m); m = mtmp; @@ -331,56 +334,58 @@ struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize, return m; } +EXPORT_SYMBOL(p9_conn_create); /** - * v9fs_mux_destroy - cancels all pending requests and frees mux resources + * p9_mux_destroy - cancels all pending requests and frees mux resources */ -void v9fs_mux_destroy(struct v9fs_mux_data *m) +void p9_conn_destroy(struct p9_conn *m) { - dprintk(DEBUG_MUX, "mux %p prev %p next %p\n", m, + P9_DPRINTK(P9_DEBUG_MUX, "mux %p prev %p next %p\n", m, m->mux_list.prev, m->mux_list.next); - v9fs_mux_cancel(m, -ECONNRESET); + p9_conn_cancel(m, -ECONNRESET); if (!list_empty(&m->req_list)) { /* wait until all processes waiting on this session exit */ - dprintk(DEBUG_MUX, "mux %p waiting for empty request queue\n", - m); + P9_DPRINTK(P9_DEBUG_MUX, + "mux %p waiting for empty request queue\n", m); wait_event_timeout(m->equeue, (list_empty(&m->req_list)), 5000); - dprintk(DEBUG_MUX, "mux %p request queue empty: %d\n", m, + P9_DPRINTK(P9_DEBUG_MUX, "mux %p request queue empty: %d\n", m, list_empty(&m->req_list)); } - v9fs_mux_poll_stop(m); + p9_mux_poll_stop(m); m->trans = NULL; - + p9_idpool_destroy(m->tagpool); kfree(m); } +EXPORT_SYMBOL(p9_conn_destroy); /** - * v9fs_pollwait - called by files poll operation to add v9fs-poll task + * p9_pollwait - called by files poll operation to add v9fs-poll task * to files wait queue */ static void -v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address, +p9_pollwait(struct file *filp, wait_queue_head_t *wait_address, poll_table * p) { int i; - struct v9fs_mux_data *m; + struct p9_conn *m; - m = container_of(p, struct v9fs_mux_data, pt); - for(i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) + m = container_of(p, struct p9_conn, pt); + for (i = 0; i < ARRAY_SIZE(m->poll_waddr); i++) if (m->poll_waddr[i] == NULL) break; if (i >= ARRAY_SIZE(m->poll_waddr)) { - dprintk(DEBUG_ERROR, "not enough wait_address slots\n"); + P9_DPRINTK(P9_DEBUG_ERROR, "not enough wait_address slots\n"); return; } m->poll_waddr[i] = wait_address; if (!wait_address) { - dprintk(DEBUG_ERROR, "no wait_address\n"); + P9_DPRINTK(P9_DEBUG_ERROR, "no wait_address\n"); m->poll_waddr[i] = ERR_PTR(-EIO); return; } @@ -390,9 +395,9 @@ v9fs_pollwait(struct file *filp, wait_queue_head_t * wait_address, } /** - * v9fs_poll_mux - polls a mux and schedules read or write works if necessary + * p9_poll_mux - polls a mux and schedules read or write works if necessary */ -static void v9fs_poll_mux(struct v9fs_mux_data *m) +static void p9_poll_mux(struct p9_conn *m) { int n; @@ -401,69 +406,69 @@ static void v9fs_poll_mux(struct v9fs_mux_data *m) n = m->trans->poll(m->trans, NULL); if (n < 0 || n & (POLLERR | POLLHUP | POLLNVAL)) { - dprintk(DEBUG_MUX, "error mux %p err %d\n", m, n); + P9_DPRINTK(P9_DEBUG_MUX, "error mux %p err %d\n", m, n); if (n >= 0) n = -ECONNRESET; - v9fs_mux_cancel(m, n); + p9_conn_cancel(m, n); } if (n & POLLIN) { set_bit(Rpending, &m->wsched); - dprintk(DEBUG_MUX, "mux %p can read\n", m); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p can read\n", m); if (!test_and_set_bit(Rworksched, &m->wsched)) { - dprintk(DEBUG_MUX, "schedule read work mux %p\n", m); - queue_work(v9fs_mux_wq, &m->rq); + P9_DPRINTK(P9_DEBUG_MUX, "schedule read work %p\n", m); + queue_work(p9_mux_wq, &m->rq); } } if (n & POLLOUT) { set_bit(Wpending, &m->wsched); - dprintk(DEBUG_MUX, "mux %p can write\n", m); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p can write\n", m); if ((m->wsize || !list_empty(&m->unsent_req_list)) && !test_and_set_bit(Wworksched, &m->wsched)) { - dprintk(DEBUG_MUX, "schedule write work mux %p\n", m); - queue_work(v9fs_mux_wq, &m->wq); + P9_DPRINTK(P9_DEBUG_MUX, "schedule write work %p\n", m); + queue_work(p9_mux_wq, &m->wq); } } } /** - * v9fs_poll_proc - polls all v9fs transports for new events and queues + * p9_poll_proc - polls all v9fs transports for new events and queues * the appropriate work to the work queue */ -static int v9fs_poll_proc(void *a) +static int p9_poll_proc(void *a) { - struct v9fs_mux_data *m, *mtmp; - struct v9fs_mux_poll_task *vpt; + struct p9_conn *m, *mtmp; + struct p9_mux_poll_task *vpt; vpt = a; - dprintk(DEBUG_MUX, "start %p %p\n", current, vpt); + P9_DPRINTK(P9_DEBUG_MUX, "start %p %p\n", current, vpt); while (!kthread_should_stop()) { set_current_state(TASK_INTERRUPTIBLE); list_for_each_entry_safe(m, mtmp, &vpt->mux_list, mux_list) { - v9fs_poll_mux(m); + p9_poll_mux(m); } - dprintk(DEBUG_MUX, "sleeping...\n"); + P9_DPRINTK(P9_DEBUG_MUX, "sleeping...\n"); schedule_timeout(SCHED_TIMEOUT * HZ); } __set_current_state(TASK_RUNNING); - dprintk(DEBUG_MUX, "finish\n"); + P9_DPRINTK(P9_DEBUG_MUX, "finish\n"); return 0; } /** - * v9fs_write_work - called when a transport can send some data + * p9_write_work - called when a transport can send some data */ -static void v9fs_write_work(struct work_struct *work) +static void p9_write_work(struct work_struct *work) { int n, err; - struct v9fs_mux_data *m; - struct v9fs_req *req; + struct p9_conn *m; + struct p9_req *req; - m = container_of(work, struct v9fs_mux_data, wq); + m = container_of(work, struct p9_conn, wq); if (m->err < 0) { clear_bit(Wworksched, &m->wsched); @@ -478,7 +483,7 @@ static void v9fs_write_work(struct work_struct *work) spin_lock(&m->lock); again: - req = list_entry(m->unsent_req_list.next, struct v9fs_req, + req = list_entry(m->unsent_req_list.next, struct p9_req, req_list); list_move_tail(&req->req_list, &m->req_list); if (req->err == ERREQFLUSH) @@ -487,14 +492,14 @@ again: m->wbuf = req->tcall->sdata; m->wsize = req->tcall->size; m->wpos = 0; - dump_data(m->wbuf, m->wsize); spin_unlock(&m->lock); } - dprintk(DEBUG_MUX, "mux %p pos %d size %d\n", m, m->wpos, m->wsize); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p pos %d size %d\n", m, m->wpos, + m->wsize); clear_bit(Wpending, &m->wsched); err = m->trans->write(m->trans, m->wbuf + m->wpos, m->wsize - m->wpos); - dprintk(DEBUG_MUX, "mux %p sent %d bytes\n", m, err); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p sent %d bytes\n", m, err); if (err == -EAGAIN) { clear_bit(Wworksched, &m->wsched); return; @@ -514,8 +519,8 @@ again: n = m->trans->poll(m->trans, NULL); if (n & POLLOUT) { - dprintk(DEBUG_MUX, "schedule write work mux %p\n", m); - queue_work(v9fs_mux_wq, &m->wq); + P9_DPRINTK(P9_DEBUG_MUX, "schedule write work %p\n", m); + queue_work(p9_mux_wq, &m->wq); } else clear_bit(Wworksched, &m->wsched); } else @@ -523,27 +528,28 @@ again: return; - error: - v9fs_mux_cancel(m, err); +error: + p9_conn_cancel(m, err); clear_bit(Wworksched, &m->wsched); } -static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req) +static void process_request(struct p9_conn *m, struct p9_req *req) { int ecode; - struct v9fs_str *ename; + struct p9_str *ename; - if (!req->err && req->rcall->id == RERROR) { + if (!req->err && req->rcall->id == P9_RERROR) { ecode = req->rcall->params.rerror.errno; ename = &req->rcall->params.rerror.error; - dprintk(DEBUG_MUX, "Rerror %.*s\n", ename->len, ename->str); + P9_DPRINTK(P9_DEBUG_MUX, "Rerror %.*s\n", ename->len, + ename->str); if (*m->extended) req->err = -ecode; if (!req->err) { - req->err = v9fs_errstr2errno(ename->str, ename->len); + req->err = p9_errstr2errno(ename->str, ename->len); if (!req->err) { /* string match failed */ PRINT_FCALL_ERROR("unknown error", req->rcall); @@ -553,47 +559,48 @@ static void process_request(struct v9fs_mux_data *m, struct v9fs_req *req) req->err = -ESERVERFAULT; } } else if (req->tcall && req->rcall->id != req->tcall->id + 1) { - dprintk(DEBUG_ERROR, "fcall mismatch: expected %d, got %d\n", - req->tcall->id + 1, req->rcall->id); + P9_DPRINTK(P9_DEBUG_ERROR, + "fcall mismatch: expected %d, got %d\n", + req->tcall->id + 1, req->rcall->id); if (!req->err) req->err = -EIO; } } /** - * v9fs_read_work - called when there is some data to be read from a transport + * p9_read_work - called when there is some data to be read from a transport */ -static void v9fs_read_work(struct work_struct *work) +static void p9_read_work(struct work_struct *work) { int n, err; - struct v9fs_mux_data *m; - struct v9fs_req *req, *rptr, *rreq; - struct v9fs_fcall *rcall; + struct p9_conn *m; + struct p9_req *req, *rptr, *rreq; + struct p9_fcall *rcall; char *rbuf; - m = container_of(work, struct v9fs_mux_data, rq); + m = container_of(work, struct p9_conn, rq); if (m->err < 0) return; rcall = NULL; - dprintk(DEBUG_MUX, "start mux %p pos %d\n", m, m->rpos); + P9_DPRINTK(P9_DEBUG_MUX, "start mux %p pos %d\n", m, m->rpos); if (!m->rcall) { m->rcall = - kmalloc(sizeof(struct v9fs_fcall) + m->msize, GFP_KERNEL); + kmalloc(sizeof(struct p9_fcall) + m->msize, GFP_KERNEL); if (!m->rcall) { err = -ENOMEM; goto error; } - m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall); + m->rbuf = (char *)m->rcall + sizeof(struct p9_fcall); m->rpos = 0; } clear_bit(Rpending, &m->wsched); err = m->trans->read(m->trans, m->rbuf + m->rpos, m->msize - m->rpos); - dprintk(DEBUG_MUX, "mux %p got %d bytes\n", m, err); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p got %d bytes\n", m, err); if (err == -EAGAIN) { clear_bit(Rworksched, &m->wsched); return; @@ -606,7 +613,7 @@ static void v9fs_read_work(struct work_struct *work) while (m->rpos > 4) { n = le32_to_cpu(*(__le32 *) m->rbuf); if (n >= m->msize) { - dprintk(DEBUG_ERROR, + P9_DPRINTK(P9_DEBUG_ERROR, "requested packet size too big: %d\n", n); err = -EIO; goto error; @@ -615,32 +622,33 @@ static void v9fs_read_work(struct work_struct *work) if (m->rpos < n) break; - dump_data(m->rbuf, n); err = - v9fs_deserialize_fcall(m->rbuf, n, m->rcall, *m->extended); + p9_deserialize_fcall(m->rbuf, n, m->rcall, *m->extended); if (err < 0) { goto error; } - if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) { +#ifdef CONFIG_NET_9P_DEBUG + if ((p9_debug_level&P9_DEBUG_FCALL) == P9_DEBUG_FCALL) { char buf[150]; - v9fs_printfcall(buf, sizeof(buf), m->rcall, + p9_printfcall(buf, sizeof(buf), m->rcall, *m->extended); printk(KERN_NOTICE ">>> %p %s\n", m, buf); } +#endif rcall = m->rcall; rbuf = m->rbuf; if (m->rpos > n) { - m->rcall = kmalloc(sizeof(struct v9fs_fcall) + m->msize, + m->rcall = kmalloc(sizeof(struct p9_fcall) + m->msize, GFP_KERNEL); if (!m->rcall) { err = -ENOMEM; goto error; } - m->rbuf = (char *)m->rcall + sizeof(struct v9fs_fcall); + m->rbuf = (char *)m->rcall + sizeof(struct p9_fcall); memmove(m->rbuf, rbuf + n, m->rpos - n); m->rpos -= n; } else { @@ -649,8 +657,8 @@ static void v9fs_read_work(struct work_struct *work) m->rpos = 0; } - dprintk(DEBUG_MUX, "mux %p fcall id %d tag %d\n", m, rcall->id, - rcall->tag); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p fcall id %d tag %d\n", m, + rcall->id, rcall->tag); req = NULL; spin_lock(&m->lock); @@ -677,10 +685,10 @@ static void v9fs_read_work(struct work_struct *work) wake_up(&m->equeue); } } else { - if (err >= 0 && rcall->id != RFLUSH) - dprintk(DEBUG_ERROR, - "unexpected response mux %p id %d tag %d\n", - m, rcall->id, rcall->tag); + if (err >= 0 && rcall->id != P9_RFLUSH) + P9_DPRINTK(P9_DEBUG_ERROR, + "unexpected response mux %p id %d tag %d\n", + m, rcall->id, rcall->tag); kfree(rcall); } } @@ -692,8 +700,8 @@ static void v9fs_read_work(struct work_struct *work) n = m->trans->poll(m->trans, NULL); if (n & POLLIN) { - dprintk(DEBUG_MUX, "schedule read work mux %p\n", m); - queue_work(v9fs_mux_wq, &m->rq); + P9_DPRINTK(P9_DEBUG_MUX, "schedule read work %p\n", m); + queue_work(p9_mux_wq, &m->rq); } else clear_bit(Rworksched, &m->wsched); } else @@ -701,13 +709,13 @@ static void v9fs_read_work(struct work_struct *work) return; - error: - v9fs_mux_cancel(m, err); +error: + p9_conn_cancel(m, err); clear_bit(Rworksched, &m->wsched); } /** - * v9fs_send_request - send 9P request + * p9_send_request - send 9P request * The function can sleep until the request is scheduled for sending. * The function can be interrupted. Return from the function is not * a guarantee that the request is sent successfully. Can return errors @@ -718,37 +726,40 @@ static void v9fs_read_work(struct work_struct *work) * @cb: callback function to call when response is received * @cba: parameter to pass to the callback function */ -static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m, - struct v9fs_fcall *tc, - v9fs_mux_req_callback cb, void *cba) +static struct p9_req *p9_send_request(struct p9_conn *m, + struct p9_fcall *tc, + p9_conn_req_callback cb, void *cba) { int n; - struct v9fs_req *req; + struct p9_req *req; - dprintk(DEBUG_MUX, "mux %p task %p tcall %p id %d\n", m, current, + P9_DPRINTK(P9_DEBUG_MUX, "mux %p task %p tcall %p id %d\n", m, current, tc, tc->id); if (m->err < 0) return ERR_PTR(m->err); - req = kmalloc(sizeof(struct v9fs_req), GFP_KERNEL); + req = kmalloc(sizeof(struct p9_req), GFP_KERNEL); if (!req) return ERR_PTR(-ENOMEM); - if (tc->id == TVERSION) - n = V9FS_NOTAG; + if (tc->id == P9_TVERSION) + n = P9_NOTAG; else - n = v9fs_mux_get_tag(m); + n = p9_mux_get_tag(m); if (n < 0) return ERR_PTR(-ENOMEM); - v9fs_set_tag(tc, n); - if ((v9fs_debug_level&DEBUG_FCALL) == DEBUG_FCALL) { + p9_set_tag(tc, n); + +#ifdef CONFIG_NET_9P_DEBUG + if ((p9_debug_level&P9_DEBUG_FCALL) == P9_DEBUG_FCALL) { char buf[150]; - v9fs_printfcall(buf, sizeof(buf), tc, *m->extended); + p9_printfcall(buf, sizeof(buf), tc, *m->extended); printk(KERN_NOTICE "<<< %p %s\n", m, buf); } +#endif spin_lock_init(&req->lock); req->tag = n; @@ -769,26 +780,26 @@ static struct v9fs_req *v9fs_send_request(struct v9fs_mux_data *m, n = m->trans->poll(m->trans, NULL); if (n & POLLOUT && !test_and_set_bit(Wworksched, &m->wsched)) - queue_work(v9fs_mux_wq, &m->wq); + queue_work(p9_mux_wq, &m->wq); return req; } -static void v9fs_mux_free_request(struct v9fs_mux_data *m, struct v9fs_req *req) +static void p9_mux_free_request(struct p9_conn *m, struct p9_req *req) { - v9fs_mux_put_tag(m, req->tag); + p9_mux_put_tag(m, req->tag); kfree(req); } -static void v9fs_mux_flush_cb(struct v9fs_req *freq, void *a) +static void p9_mux_flush_cb(struct p9_req *freq, void *a) { - v9fs_mux_req_callback cb; + p9_conn_req_callback cb; int tag; - struct v9fs_mux_data *m; - struct v9fs_req *req, *rreq, *rptr; + struct p9_conn *m; + struct p9_req *req, *rreq, *rptr; m = a; - dprintk(DEBUG_MUX, "mux %p tc %p rc %p err %d oldtag %d\n", m, + P9_DPRINTK(P9_DEBUG_MUX, "mux %p tc %p rc %p err %d oldtag %d\n", m, freq->tcall, freq->rcall, freq->err, freq->tcall->params.tflush.oldtag); @@ -820,22 +831,23 @@ static void v9fs_mux_flush_cb(struct v9fs_req *freq, void *a) kfree(freq->tcall); kfree(freq->rcall); - v9fs_mux_free_request(m, freq); + p9_mux_free_request(m, freq); } static int -v9fs_mux_flush_request(struct v9fs_mux_data *m, struct v9fs_req *req) +p9_mux_flush_request(struct p9_conn *m, struct p9_req *req) { - struct v9fs_fcall *fc; - struct v9fs_req *rreq, *rptr; + struct p9_fcall *fc; + struct p9_req *rreq, *rptr; - dprintk(DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag); /* if a response was received for a request, do nothing */ spin_lock(&req->lock); if (req->rcall || req->err) { spin_unlock(&req->lock); - dprintk(DEBUG_MUX, "mux %p req %p response already received\n", m, req); + P9_DPRINTK(P9_DEBUG_MUX, + "mux %p req %p response already received\n", m, req); return 0; } @@ -846,7 +858,8 @@ v9fs_mux_flush_request(struct v9fs_mux_data *m, struct v9fs_req *req) /* if the request is not sent yet, just remove it from the list */ list_for_each_entry_safe(rreq, rptr, &m->unsent_req_list, req_list) { if (rreq->tag == req->tag) { - dprintk(DEBUG_MUX, "mux %p req %p request is not sent yet\n", m, req); + P9_DPRINTK(P9_DEBUG_MUX, + "mux %p req %p request is not sent yet\n", m, req); list_del(&rreq->req_list); req->flush = Flushed; spin_unlock(&m->lock); @@ -858,42 +871,42 @@ v9fs_mux_flush_request(struct v9fs_mux_data *m, struct v9fs_req *req) spin_unlock(&m->lock); clear_thread_flag(TIF_SIGPENDING); - fc = v9fs_create_tflush(req->tag); - v9fs_send_request(m, fc, v9fs_mux_flush_cb, m); + fc = p9_create_tflush(req->tag); + p9_send_request(m, fc, p9_mux_flush_cb, m); return 1; } static void -v9fs_mux_rpc_cb(struct v9fs_req *req, void *a) +p9_conn_rpc_cb(struct p9_req *req, void *a) { - struct v9fs_mux_rpc *r; + struct p9_mux_rpc *r; - dprintk(DEBUG_MUX, "req %p r %p\n", req, a); + P9_DPRINTK(P9_DEBUG_MUX, "req %p r %p\n", req, a); r = a; r->rcall = req->rcall; r->err = req->err; - if (req->flush!=None && !req->err) + if (req->flush != None && !req->err) r->err = -ERESTARTSYS; wake_up(&r->wqueue); } /** - * v9fs_mux_rpc - sends 9P request and waits until a response is available. + * p9_mux_rpc - sends 9P request and waits until a response is available. * The function can be interrupted. * @m: mux data * @tc: request to be sent * @rc: pointer where a pointer to the response is stored */ int -v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, - struct v9fs_fcall **rc) +p9_conn_rpc(struct p9_conn *m, struct p9_fcall *tc, + struct p9_fcall **rc) { int err, sigpending; unsigned long flags; - struct v9fs_req *req; - struct v9fs_mux_rpc r; + struct p9_req *req; + struct p9_mux_rpc r; r.err = 0; r.tcall = tc; @@ -910,10 +923,10 @@ v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, clear_thread_flag(TIF_SIGPENDING); } - req = v9fs_send_request(m, tc, v9fs_mux_rpc_cb, &r); + req = p9_send_request(m, tc, p9_conn_rpc_cb, &r); if (IS_ERR(req)) { err = PTR_ERR(req); - dprintk(DEBUG_MUX, "error %d\n", err); + P9_DPRINTK(P9_DEBUG_MUX, "error %d\n", err); return err; } @@ -921,15 +934,16 @@ v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, if (r.err < 0) err = r.err; - if (err == -ERESTARTSYS && m->trans->status == Connected && m->err == 0) { - if (v9fs_mux_flush_request(m, req)) { + if (err == -ERESTARTSYS && m->trans->status == Connected + && m->err == 0) { + if (p9_mux_flush_request(m, req)) { /* wait until we get response of the flush message */ do { clear_thread_flag(TIF_SIGPENDING); err = wait_event_interruptible(r.wqueue, r.rcall || r.err); - } while (!r.rcall && !r.err && err==-ERESTARTSYS && - m->trans->status==Connected && !m->err); + } while (!r.rcall && !r.err && err == -ERESTARTSYS && + m->trans->status == Connected && !m->err); err = -ERESTARTSYS; } @@ -947,50 +961,52 @@ v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, else kfree(r.rcall); - v9fs_mux_free_request(m, req); + p9_mux_free_request(m, req); if (err > 0) err = -EIO; return err; } +EXPORT_SYMBOL(p9_conn_rpc); -#if 0 +#ifdef P9_NONBLOCK /** - * v9fs_mux_rpcnb - sends 9P request without waiting for response. + * p9_conn_rpcnb - sends 9P request without waiting for response. * @m: mux data * @tc: request to be sent * @cb: callback function to be called when response arrives * @cba: value to pass to the callback function */ -int v9fs_mux_rpcnb(struct v9fs_mux_data *m, struct v9fs_fcall *tc, - v9fs_mux_req_callback cb, void *a) +int p9_conn_rpcnb(struct p9_conn *m, struct p9_fcall *tc, + p9_conn_req_callback cb, void *a) { int err; - struct v9fs_req *req; + struct p9_req *req; - req = v9fs_send_request(m, tc, cb, a); + req = p9_send_request(m, tc, cb, a); if (IS_ERR(req)) { err = PTR_ERR(req); - dprintk(DEBUG_MUX, "error %d\n", err); + P9_DPRINTK(P9_DEBUG_MUX, "error %d\n", err); return PTR_ERR(req); } - dprintk(DEBUG_MUX, "mux %p tc %p tag %d\n", m, tc, req->tag); + P9_DPRINTK(P9_DEBUG_MUX, "mux %p tc %p tag %d\n", m, tc, req->tag); return 0; } -#endif /* 0 */ +EXPORT_SYMBOL(p9_conn_rpcnb); +#endif /* P9_NONBLOCK */ /** - * v9fs_mux_cancel - cancel all pending requests with error + * p9_conn_cancel - cancel all pending requests with error * @m: mux data * @err: error code */ -void v9fs_mux_cancel(struct v9fs_mux_data *m, int err) +void p9_conn_cancel(struct p9_conn *m, int err) { - struct v9fs_req *req, *rtmp; + struct p9_req *req, *rtmp; LIST_HEAD(cancel_list); - dprintk(DEBUG_ERROR, "mux %p err %d\n", m, err); + P9_DPRINTK(P9_DEBUG_ERROR, "mux %p err %d\n", m, err); m->err = err; spin_lock(&m->lock); list_for_each_entry_safe(req, rtmp, &m->req_list, req_list) { @@ -1014,20 +1030,21 @@ void v9fs_mux_cancel(struct v9fs_mux_data *m, int err) wake_up(&m->equeue); } +EXPORT_SYMBOL(p9_conn_cancel); -static u16 v9fs_mux_get_tag(struct v9fs_mux_data *m) +static u16 p9_mux_get_tag(struct p9_conn *m) { int tag; - tag = v9fs_get_idpool(&m->tagpool); + tag = p9_idpool_get(m->tagpool); if (tag < 0) - return V9FS_NOTAG; + return P9_NOTAG; else return (u16) tag; } -static void v9fs_mux_put_tag(struct v9fs_mux_data *m, u16 tag) +static void p9_mux_put_tag(struct p9_conn *m, u16 tag) { - if (tag != V9FS_NOTAG && v9fs_check_idpool(tag, &m->tagpool)) - v9fs_put_idpool(tag, &m->tagpool); + if (tag != P9_NOTAG && p9_idpool_check(tag, m->tagpool)) + p9_idpool_put(tag, m->tagpool); } diff --git a/net/9p/sysctl.c b/net/9p/sysctl.c new file mode 100644 index 0000000..e7fe706 --- /dev/null +++ b/net/9p/sysctl.c @@ -0,0 +1,86 @@ +/* + * net/9p/sysctl.c + * + * 9P sysctl interface + * + * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/sysctl.h> +#include <linux/init.h> +#include <net/9p/9p.h> + +enum { + P9_SYSCTL_NET = 487, + P9_SYSCTL_DEBUG = 1, +}; + +static ctl_table p9_table[] = { +#ifdef CONFIG_NET_9P_DEBUG + { + .ctl_name = P9_SYSCTL_DEBUG, + .procname = "debug", + .data = &p9_debug_level, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dointvec + }, +#endif + { .ctl_name = 0 }, +}; + +static ctl_table p9_net_table[] = { + { + .ctl_name = P9_SYSCTL_NET, + .procname = "9p", + .maxlen = 0, + .mode = 0555, + .child = p9_table, + }, + { .ctl_name = 0 }, +}; + +static ctl_table p9_ctl_table[] = { + { + .ctl_name = CTL_NET, + .procname = "net", + .maxlen = 0, + .mode = 0555, + .child = p9_net_table, + }, + { .ctl_name = 0 }, +}; + +static struct ctl_table_header *p9_table_header; + +int __init p9_sysctl_register(void) +{ + p9_table_header = register_sysctl_table(p9_ctl_table); + if (!p9_table_header) + return -ENOMEM; + + return 0; +} + +void __exit p9_sysctl_unregister(void) +{ + unregister_sysctl_table(p9_table_header); +} diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c new file mode 100644 index 0000000..fd636e9 --- /dev/null +++ b/net/9p/trans_fd.c @@ -0,0 +1,363 @@ +/* + * linux/fs/9p/trans_fd.c + * + * Fd transport layer. Includes deprecated socket layer. + * + * Copyright (C) 2006 by Russ Cox <rsc@swtch.com> + * Copyright (C) 2004-2005 by Latchesar Ionkov <lucho@ionkov.net> + * Copyright (C) 2004-2005 by Eric Van Hensbergen <ericvh@gmail.com> + * Copyright (C) 1997-2002 by Ron Minnich <rminnich@sarnoff.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include <linux/in.h> +#include <linux/module.h> +#include <linux/net.h> +#include <linux/ipv6.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/un.h> +#include <linux/uaccess.h> +#include <linux/inet.h> +#include <linux/idr.h> +#include <linux/file.h> +#include <net/9p/9p.h> +#include <net/9p/transport.h> + +#define P9_PORT 564 + +struct p9_trans_fd { + struct file *rd; + struct file *wr; +}; + +static int p9_socket_open(struct p9_transport *trans, struct socket *csocket); +static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd); +static int p9_fd_read(struct p9_transport *trans, void *v, int len); +static int p9_fd_write(struct p9_transport *trans, void *v, int len); +static unsigned int p9_fd_poll(struct p9_transport *trans, + struct poll_table_struct *pt); +static void p9_fd_close(struct p9_transport *trans); + +struct p9_transport *p9_trans_create_tcp(const char *addr, int port) +{ + int err; + struct p9_transport *trans; + struct socket *csocket; + struct sockaddr_in sin_server; + + csocket = NULL; + trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL); + if (!trans) + return ERR_PTR(-ENOMEM); + + trans->write = p9_fd_write; + trans->read = p9_fd_read; + trans->close = p9_fd_close; + trans->poll = p9_fd_poll; + + sin_server.sin_family = AF_INET; + sin_server.sin_addr.s_addr = in_aton(addr); + sin_server.sin_port = htons(port); + sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, &csocket); + + if (!csocket) { + P9_EPRINTK(KERN_ERR, "p9_trans_tcp: problem creating socket\n"); + err = -EIO; + goto error; + } + + err = csocket->ops->connect(csocket, + (struct sockaddr *)&sin_server, + sizeof(struct sockaddr_in), 0); + if (err < 0) { + P9_EPRINTK(KERN_ERR, + "p9_trans_tcp: problem connecting socket to %s\n", + addr); + goto error; + } + + err = p9_socket_open(trans, csocket); + if (err < 0) + goto error; + + return trans; + +error: + if (csocket) + sock_release(csocket); + + kfree(trans); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_trans_create_tcp); + +struct p9_transport *p9_trans_create_unix(const char *addr) +{ + int err; + struct socket *csocket; + struct sockaddr_un sun_server; + struct p9_transport *trans; + + csocket = NULL; + trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL); + if (!trans) + return ERR_PTR(-ENOMEM); + + trans->write = p9_fd_write; + trans->read = p9_fd_read; + trans->close = p9_fd_close; + trans->poll = p9_fd_poll; + + if (strlen(addr) > UNIX_PATH_MAX) { + P9_EPRINTK(KERN_ERR, "p9_trans_unix: address too long: %s\n", + addr); + err = -ENAMETOOLONG; + goto error; + } + + sun_server.sun_family = PF_UNIX; + strcpy(sun_server.sun_path, addr); + sock_create_kern(PF_UNIX, SOCK_STREAM, 0, &csocket); + err = csocket->ops->connect(csocket, (struct sockaddr *)&sun_server, + sizeof(struct sockaddr_un) - 1, 0); + if (err < 0) { + P9_EPRINTK(KERN_ERR, + "p9_trans_unix: problem connecting socket: %s: %d\n", + addr, err); + goto error; + } + + err = p9_socket_open(trans, csocket); + if (err < 0) + goto error; + + return trans; + +error: + if (csocket) + sock_release(csocket); + + kfree(trans); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_trans_create_unix); + +struct p9_transport *p9_trans_create_fd(int rfd, int wfd) +{ + int err; + struct p9_transport *trans; + + if (rfd == ~0 || wfd == ~0) { + printk(KERN_ERR "v9fs: Insufficient options for proto=fd\n"); + return ERR_PTR(-ENOPROTOOPT); + } + + trans = kmalloc(sizeof(struct p9_transport), GFP_KERNEL); + if (!trans) + return ERR_PTR(-ENOMEM); + + trans->write = p9_fd_write; + trans->read = p9_fd_read; + trans->close = p9_fd_close; + trans->poll = p9_fd_poll; + + err = p9_fd_open(trans, rfd, wfd); + if (err < 0) + goto error; + + return trans; + +error: + kfree(trans); + return ERR_PTR(err); +} +EXPORT_SYMBOL(p9_trans_create_fd); + +static int p9_socket_open(struct p9_transport *trans, struct socket *csocket) +{ + int fd, ret; + + csocket->sk->sk_allocation = GFP_NOIO; + fd = sock_map_fd(csocket); + if (fd < 0) { + P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to map fd\n"); + return fd; + } + + ret = p9_fd_open(trans, fd, fd); + if (ret < 0) { + P9_EPRINTK(KERN_ERR, "p9_socket_open: failed to open fd\n"); + sockfd_put(csocket); + return ret; + } + + ((struct p9_trans_fd *)trans->priv)->rd->f_flags |= O_NONBLOCK; + + return 0; +} + +static int p9_fd_open(struct p9_transport *trans, int rfd, int wfd) +{ + struct p9_trans_fd *ts = kmalloc(sizeof(struct p9_trans_fd), + GFP_KERNEL); + if (!ts) + return -ENOMEM; + + ts->rd = fget(rfd); + ts->wr = fget(wfd); + if (!ts->rd || !ts->wr) { + if (ts->rd) + fput(ts->rd); + if (ts->wr) + fput(ts->wr); + kfree(ts); + return -EIO; + } + + trans->priv = ts; + trans->status = Connected; + + return 0; +} + +/** + * p9_fd_read- read from a fd + * @v9ses: session information + * @v: buffer to receive data into + * @len: size of receive buffer + * + */ +static int p9_fd_read(struct p9_transport *trans, void *v, int len) +{ + int ret; + struct p9_trans_fd *ts = NULL; + + if (trans && trans->status != Disconnected) + ts = trans->priv; + + if (!ts) + return -EREMOTEIO; + + if (!(ts->rd->f_flags & O_NONBLOCK)) + P9_DPRINTK(P9_DEBUG_ERROR, "blocking read ...\n"); + + ret = kernel_read(ts->rd, ts->rd->f_pos, v, len); + if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN) + trans->status = Disconnected; + return ret; +} + +/** + * p9_fd_write - write to a socket + * @v9ses: session information + * @v: buffer to send data from + * @len: size of send buffer + * + */ +static int p9_fd_write(struct p9_transport *trans, void *v, int len) +{ + int ret; + mm_segment_t oldfs; + struct p9_trans_fd *ts = NULL; + + if (trans && trans->status != Disconnected) + ts = trans->priv; + + if (!ts) + return -EREMOTEIO; + + if (!(ts->wr->f_flags & O_NONBLOCK)) + P9_DPRINTK(P9_DEBUG_ERROR, "blocking write ...\n"); + + oldfs = get_fs(); + set_fs(get_ds()); + /* The cast to a user pointer is valid due to the set_fs() */ + ret = vfs_write(ts->wr, (void __user *)v, len, &ts->wr->f_pos); + set_fs(oldfs); + + if (ret <= 0 && ret != -ERESTARTSYS && ret != -EAGAIN) + trans->status = Disconnected; + return ret; +} + +static unsigned int +p9_fd_poll(struct p9_transport *trans, struct poll_table_struct *pt) +{ + int ret, n; + struct p9_trans_fd *ts = NULL; + mm_segment_t oldfs; + + if (trans && trans->status == Connected) + ts = trans->priv; + + if (!ts) + return -EREMOTEIO; + + if (!ts->rd->f_op || !ts->rd->f_op->poll) + return -EIO; + + if (!ts->wr->f_op || !ts->wr->f_op->poll) + return -EIO; + + oldfs = get_fs(); + set_fs(get_ds()); + + ret = ts->rd->f_op->poll(ts->rd, pt); + if (ret < 0) + goto end; + + if (ts->rd != ts->wr) { + n = ts->wr->f_op->poll(ts->wr, pt); + if (n < 0) { + ret = n; + goto end; + } + ret = (ret & ~POLLOUT) | (n & ~POLLIN); + } + +end: + set_fs(oldfs); + return ret; +} + +/** + * p9_sock_close - shutdown socket + * @trans: private socket structure + * + */ +static void p9_fd_close(struct p9_transport *trans) +{ + struct p9_trans_fd *ts; + + if (!trans) + return; + + ts = xchg(&trans->priv, NULL); + + if (!ts) + return; + + trans->status = Disconnected; + if (ts->rd) + fput(ts->rd); + if (ts->wr) + fput(ts->wr); + kfree(ts); +} + diff --git a/net/9p/util.c b/net/9p/util.c new file mode 100644 index 0000000..22077b7 --- /dev/null +++ b/net/9p/util.c @@ -0,0 +1,125 @@ +/* + * net/9p/util.c + * + * This file contains some helper functions + * + * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> + * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> + * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/sched.h> +#include <linux/parser.h> +#include <linux/idr.h> +#include <net/9p/9p.h> + +struct p9_idpool { + struct semaphore lock; + struct idr pool; +}; + +struct p9_idpool *p9_idpool_create(void) +{ + struct p9_idpool *p; + + p = kmalloc(sizeof(struct p9_idpool), GFP_KERNEL); + if (!p) + return ERR_PTR(-ENOMEM); + + init_MUTEX(&p->lock); + idr_init(&p->pool); + + return p; +} +EXPORT_SYMBOL(p9_idpool_create); + +void p9_idpool_destroy(struct p9_idpool *p) +{ + idr_destroy(&p->pool); + kfree(p); +} +EXPORT_SYMBOL(p9_idpool_destroy); + +/** + * p9_idpool_get - allocate numeric id from pool + * @p - pool to allocate from + * + * XXX - This seems to be an awful generic function, should it be in idr.c with + * the lock included in struct idr? + */ + +int p9_idpool_get(struct p9_idpool *p) +{ + int i = 0; + int error; + +retry: + if (idr_pre_get(&p->pool, GFP_KERNEL) == 0) + return 0; + + if (down_interruptible(&p->lock) == -EINTR) { + P9_EPRINTK(KERN_WARNING, "Interrupted while locking\n"); + return -1; + } + + /* no need to store exactly p, we just need something non-null */ + error = idr_get_new(&p->pool, p, &i); + up(&p->lock); + + if (error == -EAGAIN) + goto retry; + else if (error) + return -1; + + return i; +} +EXPORT_SYMBOL(p9_idpool_get); + +/** + * p9_idpool_put - release numeric id from pool + * @p - pool to allocate from + * + * XXX - This seems to be an awful generic function, should it be in idr.c with + * the lock included in struct idr? + */ + +void p9_idpool_put(int id, struct p9_idpool *p) +{ + if (down_interruptible(&p->lock) == -EINTR) { + P9_EPRINTK(KERN_WARNING, "Interrupted while locking\n"); + return; + } + idr_remove(&p->pool, id); + up(&p->lock); +} +EXPORT_SYMBOL(p9_idpool_put); + +/** + * p9_idpool_check - check if the specified id is available + * @id - id to check + * @p - pool + */ +int p9_idpool_check(int id, struct p9_idpool *p) +{ + return idr_find(&p->pool, id) != NULL; +} +EXPORT_SYMBOL(p9_idpool_check); diff --git a/net/Kconfig b/net/Kconfig index f3de729..cdba08c 100644 --- a/net/Kconfig +++ b/net/Kconfig @@ -227,6 +227,7 @@ source "net/ieee80211/Kconfig" endmenu source "net/rfkill/Kconfig" +source "net/9p/Kconfig" endif # if NET endmenu # Networking diff --git a/net/Makefile b/net/Makefile index a87a889..bbe7d2a 100644 --- a/net/Makefile +++ b/net/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_TIPC) += tipc/ obj-$(CONFIG_NETLABEL) += netlabel/ obj-$(CONFIG_IUCV) += iucv/ obj-$(CONFIG_RFKILL) += rfkill/ +obj-$(CONFIG_NET_9P) += 9p/ ifeq ($(CONFIG_NET),y) obj-$(CONFIG_SYSCTL) += sysctl_net.o |