forked from luck/tmp_suning_uos_patched
48b32a3553
Christoph Hellwig had asked me quite some time ago to port the reiserfs
xattrs to the generic xattr interface.
This patch replaces the reiserfs-specific xattr handling code with the
generic struct xattr_handler.
However, since reiserfs doesn't split the prefix and name when accessing
xattrs, it can't leverage generic_{set,get,list,remove}xattr without
needlessly reconstructing the name on the back end.
Update 7/26/07: Added missing dput() to deletion path.
Update 8/30/07: Added missing mark_inode_dirty when i_mode is used to
represent an ACL and no previous ACL existed.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
#include <linux/reiserfs_fs.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/xattr.h>
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#include <linux/reiserfs_xattr.h>
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#include <asm/uaccess.h>
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static int
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security_get(struct inode *inode, const char *name, void *buffer, size_t size)
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{
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if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
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return -EINVAL;
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if (IS_PRIVATE(inode))
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return -EPERM;
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return reiserfs_xattr_get(inode, name, buffer, size);
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}
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static int
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security_set(struct inode *inode, const char *name, const void *buffer,
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size_t size, int flags)
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{
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if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
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return -EINVAL;
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if (IS_PRIVATE(inode))
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return -EPERM;
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return reiserfs_xattr_set(inode, name, buffer, size, flags);
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}
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static size_t security_list(struct inode *inode, char *list, size_t list_len,
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const char *name, size_t namelen)
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{
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const size_t len = namelen + 1;
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if (IS_PRIVATE(inode))
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return 0;
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if (list && len <= list_len) {
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memcpy(list, name, namelen);
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list[namelen] = '\0';
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}
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return len;
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}
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struct xattr_handler reiserfs_xattr_security_handler = {
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.prefix = XATTR_SECURITY_PREFIX,
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.get = security_get,
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.set = security_set,
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.list = security_list,
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};
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