diff options
| -rw-r--r-- | fs/9p/Makefile | 1 | ||||
| -rw-r--r-- | fs/9p/v9fs_vfs.h | 1 | ||||
| -rw-r--r-- | fs/9p/vfs_addr.c | 109 | ||||
| -rw-r--r-- | fs/9p/vfs_file.c | 4 | ||||
| -rw-r--r-- | fs/9p/vfs_inode.c | 1 |
5 files changed, 116 insertions, 0 deletions
diff --git a/fs/9p/Makefile b/fs/9p/Makefile index 3d02308..2f4ce43 100644 --- a/fs/9p/Makefile +++ b/fs/9p/Makefile @@ -8,6 +8,7 @@ obj-$(CONFIG_9P_FS) := 9p2000.o conv.o \ vfs_super.o \ vfs_inode.o \ + vfs_addr.o \ vfs_file.o \ vfs_dir.o \ vfs_dentry.o \ diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h index c78502a..69cf290 100644 --- a/fs/9p/v9fs_vfs.h +++ b/fs/9p/v9fs_vfs.h @@ -39,6 +39,7 @@ */ extern struct file_system_type v9fs_fs_type; +extern struct address_space_operations v9fs_addr_operations; extern struct file_operations v9fs_file_operations; extern struct file_operations v9fs_dir_operations; extern struct dentry_operations v9fs_dentry_operations; diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c new file mode 100644 index 0000000..8100fb5 --- /dev/null +++ b/fs/9p/vfs_addr.c @@ -0,0 +1,109 @@ +/* + * linux/fs/9p/vfs_addr.c + * + * This file contians vfs address (mmap) ops for 9P2000. + * + * Copyright (C) 2005 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 as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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/file.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/smp_lock.h> +#include <linux/inet.h> +#include <linux/version.h> +#include <linux/pagemap.h> +#include <linux/idr.h> + +#include "debug.h" +#include "v9fs.h" +#include "9p.h" +#include "v9fs_vfs.h" +#include "fid.h" + +/** + * v9fs_vfs_readpage - read an entire page in from 9P + * + * @file: file being read + * @page: structure to page + * + */ + +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_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; + + 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); + + if (result < rsize) + break; + } while (count); + + memset(buffer, 0, count); + flush_dcache_page(page); + SetPageUptodate(page); + retval = 0; + +UnmapAndUnlock: + kunmap(page); + unlock_page(page); + return retval; +} + +struct address_space_operations v9fs_addr_operations = { + .readpage = v9fs_vfs_readpage, +}; diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c index 6852f0e..c7e14d9 100644 --- a/fs/9p/vfs_file.c +++ b/fs/9p/vfs_file.c @@ -289,6 +289,9 @@ v9fs_file_write(struct file *filp, const char __user * data, total += result; } while (count); + if(inode->i_mapping->nrpages) + invalidate_inode_pages2(inode->i_mapping); + return total; } @@ -299,4 +302,5 @@ struct file_operations v9fs_file_operations = { .open = v9fs_file_open, .release = v9fs_dir_release, .lock = v9fs_file_lock, + .mmap = generic_file_mmap, }; diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index a17b288..91f5524 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -177,6 +177,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode) inode->i_blocks = 0; inode->i_rdev = 0; inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME; + inode->i_mapping->a_ops = &v9fs_addr_operations; switch (mode & S_IFMT) { case S_IFIFO: |