Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 334 insertions, 0 deletions

diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
new file mode 100644
index 0000000..549afa1
--- /dev/null
+++ b/fs/cifs/xattr.c
@@ -0,0 +1,334 @@
+/*
+ *   fs/cifs/xattr.c
+ *
+ *   Copyright (c) International Business Machines  Corp., 2003
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library 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 Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/fs.h>
+#include <linux/posix_acl_xattr.h>
+#include "cifsfs.h"
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+
+#define MAX_EA_VALUE_SIZE 65535
+#define CIFS_XATTR_DOS_ATTRIB "user.DosAttrib"
+#define CIFS_XATTR_USER_PREFIX "user."
+#define CIFS_XATTR_SYSTEM_PREFIX "system."
+#define CIFS_XATTR_OS2_PREFIX "os2."
+#define CIFS_XATTR_SECURITY_PREFIX ".security"
+#define CIFS_XATTR_TRUSTED_PREFIX "trusted."
+#define XATTR_TRUSTED_PREFIX_LEN  8
+#define XATTR_SECURITY_PREFIX_LEN 9
+/* BB need to add server (Samba e.g) support for security and trusted prefix */
+  
+
+
+int cifs_removexattr(struct dentry * direntry, const char * ea_name)
+{
+	int rc = -EOPNOTSUPP;
+#ifdef CONFIG_CIFS_XATTR
+	int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsTconInfo *pTcon;
+	struct super_block * sb;
+	char * full_path;
+                                                                                     
+	if(direntry == NULL)
+		return -EIO;
+	if(direntry->d_inode == NULL)
+		return -EIO;
+	sb = direntry->d_inode->i_sb;
+	if(sb == NULL)
+		return -EIO;
+	xid = GetXid();
+                                                                                     
+	cifs_sb = CIFS_SB(sb);
+	pTcon = cifs_sb->tcon;
+                                                                                     
+	down(&sb->s_vfs_rename_sem);
+	full_path = build_path_from_dentry(direntry);
+	up(&sb->s_vfs_rename_sem);
+	if(full_path == NULL) {
+		FreeXid(xid);
+		return -ENOMEM;
+	}
+	if(ea_name == NULL) {
+		cFYI(1,("Null xattr names not supported"));
+	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5)
+		&& (strncmp(ea_name,CIFS_XATTR_OS2_PREFIX,4))) {
+		cFYI(1,("illegal xattr namespace %s (only user namespace supported)",ea_name));
+		/* BB what if no namespace prefix? */
+		/* Should we just pass them to server, except for
+		system and perhaps security prefixes? */
+	} else {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto remove_ea_exit;
+
+		ea_name+=5; /* skip past user. prefix */
+		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,NULL,
+			(__u16)0, cifs_sb->local_nls);
+	}
+remove_ea_exit:
+	if (full_path)
+		kfree(full_path);
+	FreeXid(xid);
+#endif
+	return rc;
+}
+
+int cifs_setxattr(struct dentry * direntry, const char * ea_name,
+        const void * ea_value, size_t value_size, int flags)
+{
+	int rc = -EOPNOTSUPP;
+#ifdef CONFIG_CIFS_XATTR
+	int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsTconInfo *pTcon;
+	struct super_block * sb;
+	char * full_path;
+
+	if(direntry == NULL)
+		return -EIO;
+	if(direntry->d_inode == NULL)
+		return -EIO;
+	sb = direntry->d_inode->i_sb;
+	if(sb == NULL)
+		return -EIO;
+	xid = GetXid();
+
+	cifs_sb = CIFS_SB(sb);
+	pTcon = cifs_sb->tcon;
+
+	down(&sb->s_vfs_rename_sem);
+	full_path = build_path_from_dentry(direntry);
+	up(&sb->s_vfs_rename_sem);
+	if(full_path == NULL) {
+		FreeXid(xid);
+		return -ENOMEM;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+
+	/* if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to 
+		returns as xattrs */
+	if(value_size > MAX_EA_VALUE_SIZE) {
+		cFYI(1,("size of EA value too large"));
+		if(full_path)
+			kfree(full_path);
+		FreeXid(xid);
+		return -EOPNOTSUPP;
+	}
+
+	if(ea_name == NULL) {
+		cFYI(1,("Null xattr names not supported"));
+	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 0) {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto set_ea_exit;
+		if(strncmp(ea_name,CIFS_XATTR_DOS_ATTRIB,14) == 0) {
+			cFYI(1,("attempt to set cifs inode metadata"));
+		}
+		ea_name += 5; /* skip past user. prefix */
+		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value,
+			(__u16)value_size, cifs_sb->local_nls);
+	} else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto set_ea_exit;
+
+		ea_name += 4; /* skip past os2. prefix */
+		rc = CIFSSMBSetEA(xid,pTcon,full_path,ea_name,ea_value,
+			(__u16)value_size, cifs_sb->local_nls);
+	} else {
+		int temp; 
+		temp = strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,
+			strlen(POSIX_ACL_XATTR_ACCESS));
+		if (temp == 0) {
+#ifdef CONFIG_CIFS_POSIX
+			rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,ea_value,
+				(const int)value_size, ACL_TYPE_ACCESS,
+				cifs_sb->local_nls);
+			cFYI(1,("set POSIX ACL rc %d",rc));
+#else
+			cFYI(1,("set POSIX ACL not supported"));
+#endif
+		} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
+#ifdef CONFIG_CIFS_POSIX
+			rc = CIFSSMBSetPosixACL(xid, pTcon,full_path,ea_value,
+				(const int)value_size, ACL_TYPE_DEFAULT,
+				cifs_sb->local_nls);
+			cFYI(1,("set POSIX default ACL rc %d",rc));
+#else
+			cFYI(1,("set default POSIX ACL not supported"));
+#endif
+		} else {
+			cFYI(1,("illegal xattr request %s (only user namespace supported)",ea_name));
+		  /* BB what if no namespace prefix? */
+		  /* Should we just pass them to server, except for 
+		  system and perhaps security prefixes? */
+		}
+	}
+
+set_ea_exit:
+	if (full_path)
+		kfree(full_path);
+	FreeXid(xid);
+#endif
+	return rc;
+}
+
+ssize_t cifs_getxattr(struct dentry * direntry, const char * ea_name,
+         void * ea_value, size_t buf_size)
+{
+	ssize_t rc = -EOPNOTSUPP;
+#ifdef CONFIG_CIFS_XATTR
+	int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsTconInfo *pTcon;
+	struct super_block * sb;
+	char * full_path;
+
+	if(direntry == NULL)
+		return -EIO;
+	if(direntry->d_inode == NULL)
+		return -EIO;
+	sb = direntry->d_inode->i_sb;
+	if(sb == NULL)
+		return -EIO;
+
+	xid = GetXid();
+
+	cifs_sb = CIFS_SB(sb);
+	pTcon = cifs_sb->tcon;
+
+	down(&sb->s_vfs_rename_sem);
+	full_path = build_path_from_dentry(direntry);
+	up(&sb->s_vfs_rename_sem);
+	if(full_path == NULL) {
+		FreeXid(xid);
+		return -ENOMEM;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+	if(ea_name == NULL) {
+		cFYI(1,("Null xattr names not supported"));
+	} else if(strncmp(ea_name,CIFS_XATTR_USER_PREFIX,5) == 0) {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto get_ea_exit;
+
+		if(strncmp(ea_name,CIFS_XATTR_DOS_ATTRIB,14) == 0) {
+			cFYI(1,("attempt to query cifs inode metadata"));
+			/* revalidate/getattr then populate from inode */
+		} /* BB add else when above is implemented */
+		ea_name += 5; /* skip past user. prefix */
+		rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value,
+			buf_size, cifs_sb->local_nls);
+	} else if(strncmp(ea_name, CIFS_XATTR_OS2_PREFIX,4) == 0) {
+		if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+			goto get_ea_exit;
+
+		ea_name += 4; /* skip past os2. prefix */
+		rc = CIFSSMBQueryEA(xid,pTcon,full_path,ea_name,ea_value,
+			buf_size, cifs_sb->local_nls);
+	} else if(strncmp(ea_name,POSIX_ACL_XATTR_ACCESS,strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
+#ifdef CONFIG_CIFS_POSIX
+		rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
+				ea_value, buf_size, ACL_TYPE_ACCESS, 
+				cifs_sb->local_nls);
+#else 
+		cFYI(1,("query POSIX ACL not supported yet"));
+#endif /* CONFIG_CIFS_POSIX */
+	} else if(strncmp(ea_name,POSIX_ACL_XATTR_DEFAULT,strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
+#ifdef CONFIG_CIFS_POSIX
+		rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
+				ea_value, buf_size, ACL_TYPE_DEFAULT, 
+				cifs_sb->local_nls);
+#else 
+		cFYI(1,("query POSIX default ACL not supported yet"));
+#endif
+	} else if(strncmp(ea_name,
+		  CIFS_XATTR_TRUSTED_PREFIX,XATTR_TRUSTED_PREFIX_LEN) == 0) {
+		cFYI(1,("Trusted xattr namespace not supported yet"));
+	} else if(strncmp(ea_name,
+		  CIFS_XATTR_SECURITY_PREFIX,XATTR_SECURITY_PREFIX_LEN) == 0) {
+		cFYI(1,("Security xattr namespace not supported yet"));
+	} else {
+		cFYI(1,("illegal xattr name request %s (only user namespace supported)",ea_name));
+	}
+
+	/* We could add an additional check for streams ie 
+	    if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to 
+		returns as xattrs */
+
+	if(rc == -EINVAL)
+		rc = -EOPNOTSUPP; 
+
+get_ea_exit:
+	if (full_path)
+		kfree(full_path);
+	FreeXid(xid);
+#endif
+	return rc;
+}
+
+ssize_t cifs_listxattr(struct dentry * direntry, char * data, size_t buf_size)
+{
+	ssize_t rc = -EOPNOTSUPP;
+#ifdef CONFIG_CIFS_XATTR
+	int xid;
+	struct cifs_sb_info *cifs_sb;
+	struct cifsTconInfo *pTcon;
+	struct super_block * sb;
+	char * full_path;
+
+	if(direntry == NULL)
+		return -EIO;
+	if(direntry->d_inode == NULL)
+		return -EIO;
+	sb = direntry->d_inode->i_sb;
+	if(sb == NULL)
+		return -EIO;
+	xid = GetXid();
+
+	cifs_sb = CIFS_SB(sb);
+	pTcon = cifs_sb->tcon;
+
+	down(&sb->s_vfs_rename_sem);
+	full_path = build_path_from_dentry(direntry);
+	up(&sb->s_vfs_rename_sem);
+	if(full_path == NULL) {
+		FreeXid(xid);
+		return -ENOMEM;
+	}
+	/* return dos attributes as pseudo xattr */
+	/* return alt name if available as pseudo attr */
+
+	/* if proc/fs/cifs/streamstoxattr is set then
+		search server for EAs or streams to 
+		returns as xattrs */
+	rc = CIFSSMBQAllEAs(xid,pTcon,full_path,data,buf_size,
+				cifs_sb->local_nls);
+
+	if (full_path)
+		kfree(full_path);
+	FreeXid(xid);
+#endif
+	return rc;
+}