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xattr: Add __vfs_{get,set,remove}xattr helpers

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Right now, various places in the kernel check for the existence of
getxattr, setxattr, and removexattr inode operations and directly call
those operations.  Switch to helper functions and test for the IOP_XATTR
flag instead.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Acked-by: James Morris <james.l.morris@oracle.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Andreas Gruenbacher
2016-09-29 17:48:42 +02:00
committed by Al Viro
parent f5c2443837
commit 5d6c31910b
14 changed files with 98 additions and 86 deletions
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4
fs/cachefiles/bind.c
View File

@@ -20,6 +20,7 @@
#include <linux/mount.h>
#include <linux/statfs.h>
#include <linux/ctype.h>
#include <linux/xattr.h>
#include "internal.h"
static int cachefiles_daemon_add_cache(struct cachefiles_cache *caches);
@@ -126,8 +127,7 @@ static int cachefiles_daemon_add_cache(struct cachefiles_cache *cache)
if (d_is_negative(root) ||
!d_backing_inode(root)->i_op->lookup ||
!d_backing_inode(root)->i_op->mkdir ||
!d_backing_inode(root)->i_op->setxattr ||
!d_backing_inode(root)->i_op->getxattr ||
!(d_backing_inode(root)->i_opflags & IOP_XATTR) ||
!root->d_sb->s_op->statfs ||
!root->d_sb->s_op->sync_fs)
goto error_unsupported;

4
fs/cachefiles/namei.c
View File

@@ -20,6 +20,7 @@
#include <linux/namei.h>
#include <linux/security.h>
#include <linux/slab.h>
#include <linux/xattr.h>
#include "internal.h"
#define CACHEFILES_KEYBUF_SIZE 512
@@ -799,8 +800,7 @@ struct dentry *cachefiles_get_directory(struct cachefiles_cache *cache,
}
ret = -EPERM;
if (!d_backing_inode(subdir)->i_op->setxattr ||
!d_backing_inode(subdir)->i_op->getxattr ||
if (!(d_backing_inode(subdir)->i_opflags & IOP_XATTR) ||
!d_backing_inode(subdir)->i_op->lookup ||
!d_backing_inode(subdir)->i_op->mkdir ||
!d_backing_inode(subdir)->i_op->create ||