diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index 1974a38bce20..e00cf8109b3f 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -185,10 +185,6 @@ static struct xattr_handler v9fs_xattr_security_handler = {
const struct xattr_handler *v9fs_xattr_handlers[] = {
&v9fs_xattr_user_handler,
&v9fs_xattr_trusted_handler,
-#ifdef CONFIG_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
#ifdef CONFIG_9P_FS_SECURITY
&v9fs_xattr_security_handler,
#endif
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 0ebeaf4e81f9..fc4b20c2688a 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -444,10 +444,6 @@ static const struct xattr_handler btrfs_btrfs_xattr_handler = {
const struct xattr_handler *btrfs_xattr_handlers[] = {
&btrfs_security_xattr_handler,
-#ifdef CONFIG_BTRFS_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&btrfs_trusted_xattr_handler,
&btrfs_user_xattr_handler,
&btrfs_btrfs_xattr_handler,
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index f65b07cc33a2..1fe1b62abebd 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -1411,10 +1411,6 @@ void ceph_release_acl_sec_ctx(struct ceph_acl_sec_ctx *as_ctx)
* attributes are handled directly.
*/
const struct xattr_handler *ceph_xattr_handlers[] = {
-#ifdef CONFIG_CEPH_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&ceph_other_xattr_handler,
NULL,
};
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index 50e762fa1a14..4ad5531686d8 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -487,9 +487,5 @@ const struct xattr_handler *cifs_xattr_handlers[] = {
&smb3_ntsd_xattr_handler, /* alias for above since avoiding "cifs" */
&cifs_cifs_ntsd_full_xattr_handler,
&smb3_ntsd_full_xattr_handler, /* alias for above since avoiding "cifs" */
-#ifdef CONFIG_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
NULL
};
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 144ace9e0dd9..83274915ba6d 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1210,10 +1210,6 @@ static const struct xattr_handler ecryptfs_xattr_handler = {
};
const struct xattr_handler *ecryptfs_xattr_handlers[] = {
-#ifdef CONFIG_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&ecryptfs_xattr_handler,
NULL
};
diff --git a/fs/erofs/xattr.c b/fs/erofs/xattr.c
index 60729b1220b6..015462763bdd 100644
--- a/fs/erofs/xattr.c
+++ b/fs/erofs/xattr.c
@@ -463,10 +463,6 @@ const struct xattr_handler __maybe_unused erofs_xattr_security_handler = {
const struct xattr_handler *erofs_xattr_handlers[] = {
&erofs_xattr_user_handler,
-#ifdef CONFIG_EROFS_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&erofs_xattr_trusted_handler,
#ifdef CONFIG_EROFS_FS_SECURITY
&erofs_xattr_security_handler,
@@ -490,13 +486,9 @@ static int xattr_entrylist(struct xattr_iter *_it,
unsigned int prefix_len;
const char *prefix;
- const struct xattr_handler *h =
- erofs_xattr_handler(entry->e_name_index);
-
- if (!h || (h->list && !h->list(it->dentry)))
+ prefix = erofs_xattr_prefix(entry->e_name_index, it->dentry);
+ if (!prefix)
return 1;
-
- prefix = xattr_prefix(h);
prefix_len = strlen(prefix);
if (!it->buffer) {
diff --git a/fs/erofs/xattr.h b/fs/erofs/xattr.h
index 0a43c9ee9f8f..97185cb649b6 100644
--- a/fs/erofs/xattr.h
+++ b/fs/erofs/xattr.h
@@ -41,15 +41,16 @@ extern const struct xattr_handler erofs_xattr_user_handler;
extern const struct xattr_handler erofs_xattr_trusted_handler;
extern const struct xattr_handler erofs_xattr_security_handler;
-static inline const struct xattr_handler *erofs_xattr_handler(unsigned int idx)
+static inline const char *erofs_xattr_prefix(unsigned int idx,
+ struct dentry *dentry)
{
+ const struct xattr_handler *handler = NULL;
+
static const struct xattr_handler *xattr_handler_map[] = {
[EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler,
#ifdef CONFIG_EROFS_FS_POSIX_ACL
- [EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] =
- &posix_acl_access_xattr_handler,
- [EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] =
- &posix_acl_default_xattr_handler,
+ [EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
+ [EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
#endif
[EROFS_XATTR_INDEX_TRUSTED] = &erofs_xattr_trusted_handler,
#ifdef CONFIG_EROFS_FS_SECURITY
@@ -57,8 +58,13 @@ static inline const struct xattr_handler *erofs_xattr_handler(unsigned int idx)
#endif
};
- return idx && idx < ARRAY_SIZE(xattr_handler_map) ?
- xattr_handler_map[idx] : NULL;
+ if (idx && idx < ARRAY_SIZE(xattr_handler_map))
+ handler = xattr_handler_map[idx];
+
+ if (!xattr_handler_can_list(handler, dentry))
+ return NULL;
+
+ return xattr_prefix(handler);
}
extern const struct xattr_handler *erofs_xattr_handlers[];
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 641abfa4b718..b126af5f8b15 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -101,8 +101,8 @@ static void ext2_xattr_rehash(struct ext2_xattr_header *,
static const struct xattr_handler *ext2_xattr_handler_map[] = {
[EXT2_XATTR_INDEX_USER] = &ext2_xattr_user_handler,
#ifdef CONFIG_EXT2_FS_POSIX_ACL
- [EXT2_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
- [EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
+ [EXT2_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
+ [EXT2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
#endif
[EXT2_XATTR_INDEX_TRUSTED] = &ext2_xattr_trusted_handler,
#ifdef CONFIG_EXT2_FS_SECURITY
@@ -113,10 +113,6 @@ static const struct xattr_handler *ext2_xattr_handler_map[] = {
const struct xattr_handler *ext2_xattr_handlers[] = {
&ext2_xattr_user_handler,
&ext2_xattr_trusted_handler,
-#ifdef CONFIG_EXT2_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
#ifdef CONFIG_EXT2_FS_SECURITY
&ext2_xattr_security_handler,
#endif
@@ -125,14 +121,18 @@ const struct xattr_handler *ext2_xattr_handlers[] = {
#define EA_BLOCK_CACHE(inode) (EXT2_SB(inode->i_sb)->s_ea_block_cache)
-static inline const struct xattr_handler *
-ext2_xattr_handler(int name_index)
+static inline const char *ext2_xattr_prefix(int name_index,
+ struct dentry *dentry)
{
const struct xattr_handler *handler = NULL;
if (name_index > 0 && name_index < ARRAY_SIZE(ext2_xattr_handler_map))
handler = ext2_xattr_handler_map[name_index];
- return handler;
+
+ if (!xattr_handler_can_list(handler, dentry))
+ return NULL;
+
+ return xattr_prefix(handler);
}
static bool
@@ -333,11 +333,10 @@ bad_block:
/* list the attribute names */
for (entry = FIRST_ENTRY(bh); !IS_LAST_ENTRY(entry);
entry = EXT2_XATTR_NEXT(entry)) {
- const struct xattr_handler *handler =
- ext2_xattr_handler(entry->e_name_index);
+ const char *prefix;
- if (handler && (!handler->list || handler->list(dentry))) {
- const char *prefix = handler->prefix ?: handler->name;
+ prefix = ext2_xattr_prefix(entry->e_name_index, dentry);
+ if (prefix) {
size_t prefix_len = strlen(prefix);
size_t size = prefix_len + entry->e_name_len + 1;
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 767454d74cd6..dadad29bd81b 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -88,8 +88,8 @@ static void ext4_xattr_rehash(struct ext4_xattr_header *);
static const struct xattr_handler * const ext4_xattr_handler_map[] = {
[EXT4_XATTR_INDEX_USER] = &ext4_xattr_user_handler,
#ifdef CONFIG_EXT4_FS_POSIX_ACL
- [EXT4_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
- [EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
+ [EXT4_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
+ [EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
#endif
[EXT4_XATTR_INDEX_TRUSTED] = &ext4_xattr_trusted_handler,
#ifdef CONFIG_EXT4_FS_SECURITY
@@ -101,10 +101,6 @@ static const struct xattr_handler * const ext4_xattr_handler_map[] = {
const struct xattr_handler *ext4_xattr_handlers[] = {
&ext4_xattr_user_handler,
&ext4_xattr_trusted_handler,
-#ifdef CONFIG_EXT4_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
#ifdef CONFIG_EXT4_FS_SECURITY
&ext4_xattr_security_handler,
#endif
@@ -173,14 +169,18 @@ static void ext4_xattr_block_csum_set(struct inode *inode,
bh->b_blocknr, BHDR(bh));
}
-static inline const struct xattr_handler *
-ext4_xattr_handler(int name_index)
+static inline const char *ext4_xattr_prefix(int name_index,
+ struct dentry *dentry)
{
const struct xattr_handler *handler = NULL;
if (name_index > 0 && name_index < ARRAY_SIZE(ext4_xattr_handler_map))
handler = ext4_xattr_handler_map[name_index];
- return handler;
+
+ if (!xattr_handler_can_list(handler, dentry))
+ return NULL;
+
+ return xattr_prefix(handler);
}
static int
@@ -740,11 +740,10 @@ ext4_xattr_list_entries(struct dentry *dentry, struct ext4_xattr_entry *entry,
size_t rest = buffer_size;
for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
- const struct xattr_handler *handler =
- ext4_xattr_handler(entry->e_name_index);
+ const char *prefix;
- if (handler && (!handler->list || handler->list(dentry))) {
- const char *prefix = handler->prefix ?: handler->name;
+ prefix = ext4_xattr_prefix(entry->e_name_index, dentry);
+ if (prefix) {
size_t prefix_len = strlen(prefix);
size_t size = prefix_len + entry->e_name_len + 1;
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index d92edbbdc30e..213805d3592c 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -192,8 +192,8 @@ const struct xattr_handler f2fs_xattr_security_handler = {
static const struct xattr_handler *f2fs_xattr_handler_map[] = {
[F2FS_XATTR_INDEX_USER] = &f2fs_xattr_user_handler,
#ifdef CONFIG_F2FS_FS_POSIX_ACL
- [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &posix_acl_access_xattr_handler,
- [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &posix_acl_default_xattr_handler,
+ [F2FS_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
+ [F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
#endif
[F2FS_XATTR_INDEX_TRUSTED] = &f2fs_xattr_trusted_handler,
#ifdef CONFIG_F2FS_FS_SECURITY
@@ -204,10 +204,6 @@ static const struct xattr_handler *f2fs_xattr_handler_map[] = {
const struct xattr_handler *f2fs_xattr_handlers[] = {
&f2fs_xattr_user_handler,
-#ifdef CONFIG_F2FS_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&f2fs_xattr_trusted_handler,
#ifdef CONFIG_F2FS_FS_SECURITY
&f2fs_xattr_security_handler,
@@ -216,13 +212,18 @@ const struct xattr_handler *f2fs_xattr_handlers[] = {
NULL,
};
-static inline const struct xattr_handler *f2fs_xattr_handler(int index)
+static inline const char *f2fs_xattr_prefix(int index,
+ struct dentry *dentry)
{
const struct xattr_handler *handler = NULL;
if (index > 0 && index < ARRAY_SIZE(f2fs_xattr_handler_map))
handler = f2fs_xattr_handler_map[index];
- return handler;
+
+ if (!xattr_handler_can_list(handler, dentry))
+ return NULL;
+
+ return xattr_prefix(handler);
}
static struct f2fs_xattr_entry *__find_xattr(void *base_addr,
@@ -573,12 +574,12 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
last_base_addr = (void *)base_addr + XATTR_SIZE(inode);
list_for_each_xattr(entry, base_addr) {
- const struct xattr_handler *handler =
- f2fs_xattr_handler(entry->e_name_index);
const char *prefix;
size_t prefix_len;
size_t size;
+ prefix = f2fs_xattr_prefix(entry->e_name_index, dentry);
+
if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
(void *)XATTR_NEXT_ENTRY(entry) > last_base_addr) {
f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
@@ -590,10 +591,9 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
goto cleanup;
}
- if (!handler || (handler->list && !handler->list(dentry)))
+ if (!prefix)
continue;
- prefix = xattr_prefix(handler);
prefix_len = strlen(prefix);
size = prefix_len + entry->e_name_len + 1;
if (buffer) {
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index adf6d17cf033..93b36d026bb4 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -1501,8 +1501,6 @@ const struct xattr_handler *gfs2_xattr_handlers_max[] = {
/* GFS2_FS_FORMAT_MIN */
&gfs2_xattr_user_handler,
&gfs2_xattr_security_handler,
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
NULL,
};
diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c
index da3e18503c65..aa4048a27f31 100644
--- a/fs/jffs2/xattr.c
+++ b/fs/jffs2/xattr.c
@@ -919,17 +919,14 @@ const struct xattr_handler *jffs2_xattr_handlers[] = {
&jffs2_user_xattr_handler,
#ifdef CONFIG_JFFS2_FS_SECURITY
&jffs2_security_xattr_handler,
-#endif
-#ifdef CONFIG_JFFS2_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
#endif
&jffs2_trusted_xattr_handler,
NULL
};
-static const struct xattr_handler *xprefix_to_handler(int xprefix) {
- const struct xattr_handler *ret;
+static const char *jffs2_xattr_prefix(int xprefix, struct dentry *dentry)
+{
+ const struct xattr_handler *ret = NULL;
switch (xprefix) {
case JFFS2_XPREFIX_USER:
@@ -942,20 +939,23 @@ static const struct xattr_handler *xprefix_to_handler(int xprefix) {
#endif
#ifdef CONFIG_JFFS2_FS_POSIX_ACL
case JFFS2_XPREFIX_ACL_ACCESS:
- ret = &posix_acl_access_xattr_handler;
+ ret = &nop_posix_acl_access;
break;
case JFFS2_XPREFIX_ACL_DEFAULT:
- ret = &posix_acl_default_xattr_handler;
+ ret = &nop_posix_acl_default;
break;
#endif
case JFFS2_XPREFIX_TRUSTED:
ret = &jffs2_trusted_xattr_handler;
break;
default:
- ret = NULL;
- break;
+ return NULL;
}
- return ret;
+
+ if (!xattr_handler_can_list(ret, dentry))
+ return NULL;
+
+ return xattr_prefix(ret);
}
ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
@@ -966,7 +966,6 @@ ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
struct jffs2_inode_cache *ic = f->inocache;
struct jffs2_xattr_ref *ref, **pref;
struct jffs2_xattr_datum *xd;
- const struct xattr_handler *xhandle;
const char *prefix;
ssize_t prefix_len, len, rc;
int retry = 0;
@@ -998,10 +997,10 @@ ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
goto out;
}
}
- xhandle = xprefix_to_handler(xd->xprefix);
- if (!xhandle || (xhandle->list && !xhandle->list(dentry)))
+
+ prefix = jffs2_xattr_prefix(xd->xprefix, dentry);
+ if (!prefix)
continue;
- prefix = xhandle->prefix ?: xhandle->name;
prefix_len = strlen(prefix);
rc = prefix_len + xd->name_len + 1;
diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c
index f817798fa1eb..931e50018f88 100644
--- a/fs/jfs/xattr.c
+++ b/fs/jfs/xattr.c
@@ -986,10 +986,6 @@ static const struct xattr_handler jfs_trusted_xattr_handler = {
};
const struct xattr_handler *jfs_xattr_handlers[] = {
-#ifdef CONFIG_JFS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&jfs_os2_xattr_handler,
&jfs_user_xattr_handler,
&jfs_security_xattr_handler,
diff --git a/fs/nfs/nfs3_fs.h b/fs/nfs/nfs3_fs.h
index 4fa37dc038b5..b333ea119ef5 100644
--- a/fs/nfs/nfs3_fs.h
+++ b/fs/nfs/nfs3_fs.h
@@ -17,7 +17,6 @@ extern int nfs3_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
extern int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
struct posix_acl *dfacl);
extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
-extern const struct xattr_handler *nfs3_xattr_handlers[];
#else
static inline int nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
struct posix_acl *dfacl)
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 1247f544a440..349cc4f60a28 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -300,12 +300,6 @@ fail:
goto out;
}
-const struct xattr_handler *nfs3_xattr_handlers[] = {
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
- NULL,
-};
-
static int
nfs3_list_one_acl(struct inode *inode, int type, const char *name, void *data,
size_t size, ssize_t *result)
diff --git a/fs/nfs/nfs3super.c b/fs/nfs/nfs3super.c
index 7c5809431e61..8a9be9e47f76 100644
--- a/fs/nfs/nfs3super.c
+++ b/fs/nfs/nfs3super.c
@@ -14,9 +14,6 @@ struct nfs_subversion nfs_v3 = {
.rpc_vers = &nfs_version3,
.rpc_ops = &nfs_v3_clientops,
.sops = &nfs_sops,
-#ifdef CONFIG_NFS_V3_ACL
- .xattr = nfs3_xattr_handlers,
-#endif
};
static int __init init_nfs_v3(void)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index e2e485167ac4..76db2fe29624 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -3446,8 +3446,7 @@ out_acl:
p = xdr_reserve_space(xdr, 4);
if (!p)
goto out_resource;
- err = xattr_supported_namespace(d_inode(dentry),
- XATTR_USER_PREFIX);
+ err = xattr_supports_user_prefix(d_inode(dentry));
*p++ = cpu_to_be32(err == 0);
}
diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
index ff64302e87e5..7324cf924932 100644
--- a/fs/ntfs3/xattr.c
+++ b/fs/ntfs3/xattr.c
@@ -1033,10 +1033,6 @@ static const struct xattr_handler ntfs_other_xattr_handler = {
};
const struct xattr_handler *ntfs_xattr_handlers[] = {
-#ifdef CONFIG_NTFS3_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&ntfs_other_xattr_handler,
NULL,
};
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 469ec45baee2..4ac77ff6e676 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -89,21 +89,17 @@ static struct ocfs2_xattr_def_value_root def_xv = {
const struct xattr_handler *ocfs2_xattr_handlers[] = {
&ocfs2_xattr_user_handler,
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
&ocfs2_xattr_trusted_handler,
&ocfs2_xattr_security_handler,
NULL
};
static const struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = {
- [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
- [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS]
- = &posix_acl_access_xattr_handler,
- [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT]
- = &posix_acl_default_xattr_handler,
- [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
- [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
+ [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
+ [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] = &nop_posix_acl_access,
+ [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
+ [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
+ [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler,
};
struct ocfs2_xattr_info {
diff --git a/fs/orangefs/xattr.c b/fs/orangefs/xattr.c
index 6ecad4f94ae6..68b62689a63e 100644
--- a/fs/orangefs/xattr.c
+++ b/fs/orangefs/xattr.c
@@ -555,8 +555,6 @@ static const struct xattr_handler orangefs_xattr_default_handler = {
};
const struct xattr_handler *orangefs_xattr_handlers[] = {
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
&orangefs_xattr_default_handler,
NULL
};
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index c14e90764e35..f658cc8ea492 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -81,8 +81,7 @@ int ovl_copy_xattr(struct super_block *sb, const struct path *oldpath, struct de
int error = 0;
size_t slen;
- if (!(old->d_inode->i_opflags & IOP_XATTR) ||
- !(new->d_inode->i_opflags & IOP_XATTR))
+ if (!old->d_inode->i_op->listxattr || !new->d_inode->i_op->listxattr)
return 0;
list_size = vfs_listxattr(old, NULL, 0);
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index f1d9f75f8786..f97ad8b40dbb 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1055,20 +1055,12 @@ static const struct xattr_handler ovl_other_xattr_handler = {
};
static const struct xattr_handler *ovl_trusted_xattr_handlers[] = {
-#ifdef CONFIG_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&ovl_own_trusted_xattr_handler,
&ovl_other_xattr_handler,
NULL
};
static const struct xattr_handler *ovl_user_xattr_handlers[] = {
-#ifdef CONFIG_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&ovl_own_user_xattr_handler,
&ovl_other_xattr_handler,
NULL
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 5a76fb35923a..7fa1b738bbab 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -957,25 +957,62 @@ set_posix_acl(struct mnt_idmap *idmap, struct dentry *dentry,
}
EXPORT_SYMBOL(set_posix_acl);
+int posix_acl_listxattr(struct inode *inode, char **buffer,
+ ssize_t *remaining_size)
+{
+ int err;
+
+ if (!IS_POSIXACL(inode))
+ return 0;
+
+ if (inode->i_acl) {
+ err = xattr_list_one(buffer, remaining_size,
+ XATTR_NAME_POSIX_ACL_ACCESS);
+ if (err)
+ return err;
+ }
+
+ if (inode->i_default_acl) {
+ err = xattr_list_one(buffer, remaining_size,
+ XATTR_NAME_POSIX_ACL_DEFAULT);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
static bool
posix_acl_xattr_list(struct dentry *dentry)
{
return IS_POSIXACL(d_backing_inode(dentry));
}
-const struct xattr_handler posix_acl_access_xattr_handler = {
+/*
+ * nop_posix_acl_access - legacy xattr handler for access POSIX ACLs
+ *
+ * This is the legacy POSIX ACL access xattr handler. It is used by some
+ * filesystems to implement their ->listxattr() inode operation. New code
+ * should never use them.
+ */
+const struct xattr_handler nop_posix_acl_access = {
.name = XATTR_NAME_POSIX_ACL_ACCESS,
- .flags = ACL_TYPE_ACCESS,
.list = posix_acl_xattr_list,
};
-EXPORT_SYMBOL_GPL(posix_acl_access_xattr_handler);
+EXPORT_SYMBOL_GPL(nop_posix_acl_access);
-const struct xattr_handler posix_acl_default_xattr_handler = {
+/*
+ * nop_posix_acl_default - legacy xattr handler for default POSIX ACLs
+ *
+ * This is the legacy POSIX ACL default xattr handler. It is used by some
+ * filesystems to implement their ->listxattr() inode operation. New code
+ * should never use them.
+ */
+const struct xattr_handler nop_posix_acl_default = {
.name = XATTR_NAME_POSIX_ACL_DEFAULT,
- .flags = ACL_TYPE_DEFAULT,
.list = posix_acl_xattr_list,
};
-EXPORT_SYMBOL_GPL(posix_acl_default_xattr_handler);
+EXPORT_SYMBOL_GPL(nop_posix_acl_default);
int simple_set_acl(struct mnt_idmap *idmap, struct dentry *dentry,
struct posix_acl *acl, int type)
@@ -1094,12 +1131,10 @@ retry_deleg:
if (error)
goto out_inode_unlock;
- if (inode->i_opflags & IOP_XATTR)
+ if (likely(!is_bad_inode(inode)))
error = set_posix_acl(idmap, dentry, acl_type, kacl);
- else if (unlikely(is_bad_inode(inode)))
- error = -EIO;
else
- error = -EOPNOTSUPP;
+ error = -EIO;
if (!error) {
fsnotify_xattr(dentry);
evm_inode_post_set_acl(dentry, acl_name, kacl);
@@ -1204,12 +1239,10 @@ retry_deleg:
if (error)
goto out_inode_unlock;
- if (inode->i_opflags & IOP_XATTR)
+ if (likely(!is_bad_inode(inode)))
error = set_posix_acl(idmap, dentry, acl_type, NULL);
- else if (unlikely(is_bad_inode(inode)))
- error = -EIO;
else
- error = -EOPNOTSUPP;
+ error = -EIO;
if (!error) {
fsnotify_xattr(dentry);
evm_inode_post_remove_acl(idmap, dentry, acl_name);
diff --git a/fs/reiserfs/file.c b/fs/reiserfs/file.c
index 467d13da198f..b54cc7048f02 100644
--- a/fs/reiserfs/file.c
+++ b/fs/reiserfs/file.c
@@ -261,3 +261,10 @@ const struct inode_operations reiserfs_file_inode_operations = {
.fileattr_get = reiserfs_fileattr_get,
.fileattr_set = reiserfs_fileattr_set,
};
+
+const struct inode_operations reiserfs_priv_file_inode_operations = {
+ .setattr = reiserfs_setattr,
+ .permission = reiserfs_permission,
+ .fileattr_get = reiserfs_fileattr_get,
+ .fileattr_set = reiserfs_fileattr_set,
+};
diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index d54cab854f60..d8debbb6105f 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2087,10 +2087,8 @@ int reiserfs_new_inode(struct reiserfs_transaction_handle *th,
* Mark it private if we're creating the privroot
* or something under it.
*/
- if (IS_PRIVATE(dir) || dentry == REISERFS_SB(sb)->priv_root) {
- inode->i_flags |= S_PRIVATE;
- inode->i_opflags &= ~IOP_XATTR;
- }
+ if (IS_PRIVATE(dir) || dentry == REISERFS_SB(sb)->priv_root)
+ reiserfs_init_priv_inode(inode);
if (reiserfs_posixacl(inode->i_sb)) {
reiserfs_write_unlock(inode->i_sb);
diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c
index 42d2c20e1345..52240cc891cf 100644
--- a/fs/reiserfs/namei.c
+++ b/fs/reiserfs/namei.c
@@ -378,13 +378,11 @@ static struct dentry *reiserfs_lookup(struct inode *dir, struct dentry *dentry,
/*
* Propagate the private flag so we know we're
- * in the priv tree. Also clear IOP_XATTR
+ * in the priv tree. Also clear xattr support
* since we don't have xattrs on xattr files.
*/
- if (IS_PRIVATE(dir)) {
- inode->i_flags |= S_PRIVATE;
- inode->i_opflags &= ~IOP_XATTR;
- }
+ if (IS_PRIVATE(dir))
+ reiserfs_init_priv_inode(inode);
}
reiserfs_write_unlock(dir->i_sb);
if (retval == IO_ERROR) {
@@ -1649,6 +1647,48 @@ static int reiserfs_rename(struct mnt_idmap *idmap,
return retval;
}
+static const struct inode_operations reiserfs_priv_dir_inode_operations = {
+ .create = reiserfs_create,
+ .lookup = reiserfs_lookup,
+ .link = reiserfs_link,
+ .unlink = reiserfs_unlink,
+ .symlink = reiserfs_symlink,
+ .mkdir = reiserfs_mkdir,
+ .rmdir = reiserfs_rmdir,
+ .mknod = reiserfs_mknod,
+ .rename = reiserfs_rename,
+ .setattr = reiserfs_setattr,
+ .permission = reiserfs_permission,
+ .fileattr_get = reiserfs_fileattr_get,
+ .fileattr_set = reiserfs_fileattr_set,
+};
+
+static const struct inode_operations reiserfs_priv_symlink_inode_operations = {
+ .get_link = page_get_link,
+ .setattr = reiserfs_setattr,
+ .permission = reiserfs_permission,
+};
+
+static const struct inode_operations reiserfs_priv_special_inode_operations = {
+ .setattr = reiserfs_setattr,
+ .permission = reiserfs_permission,
+};
+
+void reiserfs_init_priv_inode(struct inode *inode)
+{
+ inode->i_flags |= S_PRIVATE;
+ inode->i_opflags &= ~IOP_XATTR;
+
+ if (S_ISREG(inode->i_mode))
+ inode->i_op = &reiserfs_priv_file_inode_operations;
+ else if (S_ISDIR(inode->i_mode))
+ inode->i_op = &reiserfs_priv_dir_inode_operations;
+ else if (S_ISLNK(inode->i_mode))
+ inode->i_op = &reiserfs_priv_symlink_inode_operations;
+ else
+ inode->i_op = &reiserfs_priv_special_inode_operations;
+}
+
/* directories can handle most operations... */
const struct inode_operations reiserfs_dir_inode_operations = {
.create = reiserfs_create,
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index 98e6f53c2fe0..1bccf6a2e908 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -3106,6 +3106,7 @@ int reiserfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len);
/* namei.c */
+void reiserfs_init_priv_inode(struct inode *inode);
void set_de_name_and_namelen(struct reiserfs_dir_entry *de);
int search_by_entry_key(struct super_block *sb, const struct cpu_key *key,
struct treepath *path, struct reiserfs_dir_entry *de);
@@ -3175,6 +3176,7 @@ void reiserfs_unmap_buffer(struct buffer_head *);
/* file.c */
extern const struct inode_operations reiserfs_file_inode_operations;
+extern const struct inode_operations reiserfs_priv_file_inode_operations;
extern const struct file_operations reiserfs_file_operations;
extern const struct address_space_operations reiserfs_address_space_operations;
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 06d810c72c52..651027967159 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -52,6 +52,7 @@
#include <linux/quotaops.h>
#include <linux/security.h>
#include <linux/posix_acl_xattr.h>
+#include <linux/xattr.h>
#define PRIVROOT_NAME ".reiserfs_priv"
#define XAROOT_NAME "xattrs"
@@ -770,23 +771,34 @@ out:
(handler) != NULL; \
(handler) = *(handlers)++)
-/* This is the implementation for the xattr plugin infrastructure */
-static inline const struct xattr_handler *
-find_xattr_handler_prefix(const struct xattr_handler **handlers,
- const char *name)
+static inline bool reiserfs_posix_acl_list(const char *name,
+ struct dentry *dentry)
{
- const struct xattr_handler *xah;
+ return (posix_acl_type(name) >= 0) &&
+ IS_POSIXACL(d_backing_inode(dentry));
+}
- if (!handlers)
- return NULL;
+/* This is the implementation for the xattr plugin infrastructure */
+static inline bool reiserfs_xattr_list(const struct xattr_handler **handlers,
+ const char *name, struct dentry *dentry)
+{
+ if (handlers) {
+ const struct xattr_handler *xah = NULL;
- for_each_xattr_handler(handlers, xah) {
- const char *prefix = xattr_prefix(xah);
- if (strncmp(prefix, name, strlen(prefix)) == 0)
- break;
+ for_each_xattr_handler(handlers, xah) {
+ const char *prefix = xattr_prefix(xah);
+
+ if (strncmp(prefix, name, strlen(prefix)))
+ continue;
+
+ if (!xattr_handler_can_list(xah, dentry))
+ return false;
+
+ return true;
+ }
}
- return xah;
+ return reiserfs_posix_acl_list(name, dentry);
}
struct listxattr_buf {
@@ -807,12 +819,8 @@ static bool listxattr_filler(struct dir_context *ctx, const char *name,
if (name[0] != '.' ||
(namelen != 1 && (name[1] != '.' || namelen != 2))) {
- const struct xattr_handler *handler;
-
- handler = find_xattr_handler_prefix(b->dentry->d_sb->s_xattr,
- name);
- if (!handler /* Unsupported xattr name */ ||
- (handler->list && !handler->list(b->dentry)))
+ if (!reiserfs_xattr_list(b->dentry->d_sb->s_xattr, name,
+ b->dentry))
return true;
size = namelen + 1;
if (b->buf) {
@@ -888,8 +896,7 @@ static int create_privroot(struct dentry *dentry)
return -EOPNOTSUPP;
}
- d_inode(dentry)->i_flags |= S_PRIVATE;
- d_inode(dentry)->i_opflags &= ~IOP_XATTR;
+ reiserfs_init_priv_inode(d_inode(dentry));
reiserfs_info(dentry->d_sb, "Created %s - reserved for xattr "
"storage.\n", PRIVROOT_NAME);
@@ -910,10 +917,6 @@ const struct xattr_handler *reiserfs_xattr_handlers[] = {
#endif
#ifdef CONFIG_REISERFS_FS_SECURITY
&reiserfs_xattr_security_handler,
-#endif
-#ifdef CONFIG_REISERFS_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
#endif
NULL
};
@@ -975,10 +978,8 @@ int reiserfs_lookup_privroot(struct super_block *s)
if (!IS_ERR(dentry)) {
REISERFS_SB(s)->priv_root = dentry;
d_set_d_op(dentry, &xattr_lookup_poison_ops);
- if (d_really_is_positive(dentry)) {
- d_inode(dentry)->i_flags |= S_PRIVATE;
- d_inode(dentry)->i_opflags &= ~IOP_XATTR;
- }
+ if (d_really_is_positive(dentry))
+ reiserfs_init_priv_inode(d_inode(dentry));
} else
err = PTR_ERR(dentry);
inode_unlock(d_inode(s->s_root));
diff --git a/fs/xattr.c b/fs/xattr.c
index 14a7eb3c8fa8..fcf67d80d7f9 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -160,11 +160,10 @@ xattr_permission(struct mnt_idmap *idmap, struct inode *inode,
* Look for any handler that deals with the specified namespace.
*/
int
-xattr_supported_namespace(struct inode *inode, const char *prefix)
+xattr_supports_user_prefix(struct inode *inode)
{
const struct xattr_handler **handlers = inode->i_sb->s_xattr;
const struct xattr_handler *handler;
- size_t preflen;
if (!(inode->i_opflags & IOP_XATTR)) {
if (unlikely(is_bad_inode(inode)))
@@ -172,16 +171,15 @@ xattr_supported_namespace(struct inode *inode, const char *prefix)
return -EOPNOTSUPP;
}
- preflen = strlen(prefix);
-
for_each_xattr_handler(handlers, handler) {
- if (!strncmp(xattr_prefix(handler), prefix, preflen))
+ if (!strncmp(xattr_prefix(handler), XATTR_USER_PREFIX,
+ XATTR_USER_PREFIX_LEN))
return 0;
}
return -EOPNOTSUPP;
}
-EXPORT_SYMBOL(xattr_supported_namespace);
+EXPORT_SYMBOL(xattr_supports_user_prefix);
int
__vfs_setxattr(struct mnt_idmap *idmap, struct dentry *dentry,
@@ -460,6 +458,28 @@ nolsm:
}
EXPORT_SYMBOL_GPL(vfs_getxattr);
+/**
+ * vfs_listxattr - retrieve \0 separated list of xattr names
+ * @dentry: the dentry from whose inode the xattr names are retrieved
+ * @list: buffer to store xattr names into
+ * @size: size of the buffer
+ *
+ * This function returns the names of all xattrs associated with the
+ * inode of @dentry.
+ *
+ * Note, for legacy reasons the vfs_listxattr() function lists POSIX
+ * ACLs as well. Since POSIX ACLs are decoupled from IOP_XATTR the
+ * vfs_listxattr() function doesn't check for this flag since a
+ * filesystem could implement POSIX ACLs without implementing any other
+ * xattrs.
+ *
+ * However, since all codepaths that remove IOP_XATTR also assign of
+ * inode operations that either don't implement or implement a stub
+ * ->listxattr() operation.
+ *
+ * Return: On success, the size of the buffer that was used. On error a
+ * negative error code.
+ */
ssize_t
vfs_listxattr(struct dentry *dentry, char *list, size_t size)
{
@@ -469,7 +489,8 @@ vfs_listxattr(struct dentry *dentry, char *list, size_t size)
error = security_inode_listxattr(dentry);
if (error)
return error;
- if (inode->i_op->listxattr && (inode->i_opflags & IOP_XATTR)) {
+
+ if (inode->i_op->listxattr) {
error = inode->i_op->listxattr(dentry, list, size);
} else {
error = security_inode_listsecurity(inode, list, size);
@@ -949,6 +970,21 @@ SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
return error;
}
+int xattr_list_one(char **buffer, ssize_t *remaining_size, const char *name)
+{
+ size_t len;
+
+ len = strlen(name) + 1;
+ if (*buffer) {
+ if (*remaining_size < len)
+ return -ERANGE;
+ memcpy(*buffer, name, len);
+ *buffer += len;
+ }
+ *remaining_size -= len;
+ return 0;
+}
+
/*
* Combine the results of the list() operation from every xattr_handler in the
* list.
@@ -957,33 +993,22 @@ ssize_t
generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
{
const struct xattr_handler *handler, **handlers = dentry->d_sb->s_xattr;
- unsigned int size = 0;
+ ssize_t remaining_size = buffer_size;
+ int err = 0;
- if (!buffer) {
- for_each_xattr_handler(handlers, handler) {
- if (!handler->name ||
- (handler->list && !handler->list(dentry)))
- continue;
- size += strlen(handler->name) + 1;
- }
- } else {
- char *buf = buffer;
- size_t len;
+ err = posix_acl_listxattr(d_inode(dentry), &buffer, &remaining_size);
+ if (err)
+ return err;
- for_each_xattr_handler(handlers, handler) {
- if (!handler->name ||
- (handler->list && !handler->list(dentry)))
- continue;
- len = strlen(handler->name);
- if (len + 1 > buffer_size)
- return -ERANGE;
- memcpy(buf, handler->name, len + 1);
- buf += len + 1;
- buffer_size -= len + 1;
- }
- size = buf - buffer;
+ for_each_xattr_handler(handlers, handler) {
+ if (!handler->name || (handler->list && !handler->list(dentry)))
+ continue;
+ err = xattr_list_one(&buffer, &remaining_size, handler->name);
+ if (err)
+ return err;
}
- return size;
+
+ return err ? err : buffer_size - remaining_size;
}
EXPORT_SYMBOL(generic_listxattr);
@@ -1245,20 +1270,6 @@ static bool xattr_is_trusted(const char *name)
return !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN);
}
-static int xattr_list_one(char **buffer, ssize_t *remaining_size,
- const char *name)
-{
- size_t len = strlen(name) + 1;
- if (*buffer) {
- if (*remaining_size < len)
- return -ERANGE;
- memcpy(*buffer, name, len);
- *buffer += len;
- }
- *remaining_size -= len;
- return 0;
-}
-
/**
* simple_xattr_list - list all xattr objects
* @inode: inode from which to get the xattrs
@@ -1287,22 +1298,9 @@ ssize_t simple_xattr_list(struct inode *inode, struct simple_xattrs *xattrs,
ssize_t remaining_size = size;
int err = 0;
-#ifdef CONFIG_FS_POSIX_ACL
- if (IS_POSIXACL(inode)) {
- if (inode->i_acl) {
- err = xattr_list_one(&buffer, &remaining_size,
- XATTR_NAME_POSIX_ACL_ACCESS);
- if (err)
- return err;
- }
- if (inode->i_default_acl) {
- err = xattr_list_one(&buffer, &remaining_size,
- XATTR_NAME_POSIX_ACL_DEFAULT);
- if (err)
- return err;
- }
- }
-#endif
+ err = posix_acl_listxattr(inode, &buffer, &remaining_size);
+ if (err)
+ return err;
read_lock(&xattrs->lock);
for (rbp = rb_first(&xattrs->rb_root); rbp; rbp = rb_next(rbp)) {
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 7b9a0ed1b11f..43e5c219aaed 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -179,10 +179,6 @@ const struct xattr_handler *xfs_xattr_handlers[] = {
&xfs_xattr_user_handler,
&xfs_xattr_trusted_handler,
&xfs_xattr_security_handler,
-#ifdef CONFIG_XFS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
NULL
};
diff --git a/include/linux/posix_acl.h b/include/linux/posix_acl.h
index 21cc29b8a9e8..0e65b3d634d9 100644
--- a/include/linux/posix_acl.h
+++ b/include/linux/posix_acl.h
@@ -106,6 +106,8 @@ struct posix_acl *vfs_get_acl(struct mnt_idmap *idmap,
struct dentry *dentry, const char *acl_name);
int vfs_remove_acl(struct mnt_idmap *idmap, struct dentry *dentry,
const char *acl_name);
+int posix_acl_listxattr(struct inode *inode, char **buffer,
+ ssize_t *remaining_size);
#else
static inline int posix_acl_chmod(struct mnt_idmap *idmap,
struct dentry *dentry, umode_t mode)
@@ -153,6 +155,11 @@ static inline int vfs_remove_acl(struct mnt_idmap *idmap,
{
return -EOPNOTSUPP;
}
+static inline int posix_acl_listxattr(struct inode *inode, char **buffer,
+ ssize_t *remaining_size)
+{
+ return 0;
+}
#endif /* CONFIG_FS_POSIX_ACL */
struct posix_acl *get_inode_acl(struct inode *inode, int type);
diff --git a/include/linux/posix_acl_xattr.h b/include/linux/posix_acl_xattr.h
index 54cd7a14330d..e86f3b731da2 100644
--- a/include/linux/posix_acl_xattr.h
+++ b/include/linux/posix_acl_xattr.h
@@ -68,7 +68,8 @@ static inline int posix_acl_type(const char *name)
return -1;
}
-extern const struct xattr_handler posix_acl_access_xattr_handler;
-extern const struct xattr_handler posix_acl_default_xattr_handler;
+/* These are legacy handlers. Don't use them for new code. */
+extern const struct xattr_handler nop_posix_acl_access;
+extern const struct xattr_handler nop_posix_acl_default;
#endif /* _POSIX_ACL_XATTR_H */
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index 6af72461397d..d591ef59aa98 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -47,6 +47,22 @@ struct xattr_handler {
size_t size, int flags);
};
+/**
+ * xattr_handler_can_list - check whether xattr can be listed
+ * @handler: handler for this type of xattr
+ * @dentry: dentry whose inode xattr to list
+ *
+ * Determine whether the xattr associated with @dentry can be listed given
+ * @handler.
+ *
+ * Return: true if xattr can be listed, false if not.
+ */
+static inline bool xattr_handler_can_list(const struct xattr_handler *handler,
+ struct dentry *dentry)
+{
+ return handler && (!handler->list || handler->list(dentry));
+}
+
const char *xattr_full_name(const struct xattr_handler *, const char *);
struct xattr {
@@ -78,7 +94,7 @@ int vfs_getxattr_alloc(struct mnt_idmap *idmap,
struct dentry *dentry, const char *name,
char **xattr_value, size_t size, gfp_t flags);
-int xattr_supported_namespace(struct inode *inode, const char *prefix);
+int xattr_supports_user_prefix(struct inode *inode);
static inline const char *xattr_prefix(const struct xattr_handler *handler)
{
@@ -109,5 +125,6 @@ ssize_t simple_xattr_list(struct inode *inode, struct simple_xattrs *xattrs,
char *buffer, size_t size);
void simple_xattr_add(struct simple_xattrs *xattrs,
struct simple_xattr *new_xattr);
+int xattr_list_one(char **buffer, ssize_t *remaining_size, const char *name);
#endif /* _LINUX_XATTR_H */
diff --git a/mm/shmem.c b/mm/shmem.c
index 448f393d8ab2..b76521ed372d 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -3339,10 +3339,6 @@ static const struct xattr_handler shmem_trusted_xattr_handler = {
};
static const struct xattr_handler *shmem_xattr_handlers[] = {
-#ifdef CONFIG_TMPFS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
&shmem_security_xattr_handler,
&shmem_trusted_xattr_handler,
NULL