mirror of
https://github.com/torvalds/linux.git
synced 2024-11-11 22:51:42 +00:00
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
1.3 KiB
C
56 lines
1.3 KiB
C
#include <linux/reiserfs_fs.h>
|
|
#include <linux/capability.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/pagemap.h>
|
|
#include <linux/xattr.h>
|
|
#include <linux/reiserfs_xattr.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
static int
|
|
trusted_get(struct inode *inode, const char *name, void *buffer, size_t size)
|
|
{
|
|
if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
|
|
return -EINVAL;
|
|
|
|
if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
|
|
return -EPERM;
|
|
|
|
return reiserfs_xattr_get(inode, name, buffer, size);
|
|
}
|
|
|
|
static int
|
|
trusted_set(struct inode *inode, const char *name, const void *buffer,
|
|
size_t size, int flags)
|
|
{
|
|
if (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
|
|
return -EINVAL;
|
|
|
|
if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
|
|
return -EPERM;
|
|
|
|
return reiserfs_xattr_set(inode, name, buffer, size, flags);
|
|
}
|
|
|
|
static size_t trusted_list(struct inode *inode, char *list, size_t list_size,
|
|
const char *name, size_t name_len)
|
|
{
|
|
const size_t len = name_len + 1;
|
|
|
|
if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(inode))
|
|
return 0;
|
|
|
|
if (list && len <= list_size) {
|
|
memcpy(list, name, name_len);
|
|
list[name_len] = '\0';
|
|
}
|
|
return len;
|
|
}
|
|
|
|
struct xattr_handler reiserfs_xattr_trusted_handler = {
|
|
.prefix = XATTR_TRUSTED_PREFIX,
|
|
.get = trusted_get,
|
|
.set = trusted_set,
|
|
.list = trusted_list,
|
|
};
|