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-rw-r--r--drivers/staging/lustre/lustre/llite/xattr.c4
-rw-r--r--fs/9p/acl.c24
-rw-r--r--fs/9p/xattr.c4
-rw-r--r--fs/btrfs/acl.c8
-rw-r--r--fs/btrfs/inode.c16
-rw-r--r--fs/btrfs/xattr.c166
-rw-r--r--fs/btrfs/xattr.h2
-rw-r--r--fs/ceph/acl.c16
-rw-r--r--fs/cifs/xattr.c16
-rw-r--r--fs/ext2/xattr.c15
-rw-r--r--fs/ext2/xattr_security.c21
-rw-r--r--fs/ext2/xattr_trusted.c23
-rw-r--r--fs/ext2/xattr_user.c23
-rw-r--r--fs/ext4/xattr.c17
-rw-r--r--fs/ext4/xattr_security.c22
-rw-r--r--fs/ext4/xattr_trusted.c23
-rw-r--r--fs/ext4/xattr_user.c23
-rw-r--r--fs/f2fs/xattr.c92
-rw-r--r--fs/f2fs/xattr.h2
-rw-r--r--fs/gfs2/acl.c4
-rw-r--r--fs/gfs2/acl.h2
-rw-r--r--fs/gfs2/xattr.c50
-rw-r--r--fs/gfs2/xattr.h1
-rw-r--r--fs/hfsplus/posix_acl.c8
-rw-r--r--fs/hfsplus/xattr.c12
-rw-r--r--fs/jffs2/security.c22
-rw-r--r--fs/jffs2/xattr.c26
-rw-r--r--fs/jffs2/xattr_trusted.c21
-rw-r--r--fs/jffs2/xattr_user.c20
-rw-r--r--fs/jfs/acl.c8
-rw-r--r--fs/kernfs/inode.c4
-rw-r--r--fs/nfs/nfs3acl.c4
-rw-r--r--fs/nfs/nfs4proc.c75
-rw-r--r--fs/ocfs2/xattr.c168
-rw-r--r--fs/posix_acl.c25
-rw-r--r--fs/reiserfs/xattr.c16
-rw-r--r--fs/reiserfs/xattr_acl.c8
-rw-r--r--fs/reiserfs/xattr_security.c16
-rw-r--r--fs/reiserfs/xattr_trusted.c15
-rw-r--r--fs/reiserfs/xattr_user.c14
-rw-r--r--fs/squashfs/xattr.c38
-rw-r--r--fs/xattr.c165
-rw-r--r--fs/xfs/xfs_acl.c23
-rw-r--r--fs/xfs/xfs_acl.h4
-rw-r--r--fs/xfs/xfs_xattr.c143
-rw-r--r--include/linux/posix_acl_xattr.h6
-rw-r--r--include/linux/xattr.h20
-rw-r--r--mm/shmem.c133
-rw-r--r--security/smack/smack_lsm.c2
49 files changed, 516 insertions, 1054 deletions
diff --git a/drivers/staging/lustre/lustre/llite/xattr.c b/drivers/staging/lustre/lustre/llite/xattr.c
index 4b7eb33f7d01..660b8ac37ae0 100644
--- a/drivers/staging/lustre/lustre/llite/xattr.c
+++ b/drivers/staging/lustre/lustre/llite/xattr.c
@@ -60,10 +60,10 @@
static
int get_xattr_type(const char *name)
{
- if (!strcmp(name, POSIX_ACL_XATTR_ACCESS))
+ if (!strcmp(name, XATTR_NAME_POSIX_ACL_ACCESS))
return XATTR_ACL_ACCESS_T;
- if (!strcmp(name, POSIX_ACL_XATTR_DEFAULT))
+ if (!strcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT))
return XATTR_ACL_DEFAULT_T;
if (!strncmp(name, XATTR_USER_PREFIX,
diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index a7e28890f5ef..9da967f38387 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -67,8 +67,8 @@ int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
return 0;
}
/* get the default/access acl values and cache them */
- dacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_DEFAULT);
- pacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_ACCESS);
+ dacl = __v9fs_get_acl(fid, XATTR_NAME_POSIX_ACL_DEFAULT);
+ pacl = __v9fs_get_acl(fid, XATTR_NAME_POSIX_ACL_ACCESS);
if (!IS_ERR(dacl) && !IS_ERR(pacl)) {
set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl);
@@ -133,10 +133,10 @@ static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl)
goto err_free_out;
switch (type) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
+ name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
+ name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
BUG();
@@ -220,15 +220,12 @@ static int v9fs_xattr_get_acl(const struct xattr_handler *handler,
struct posix_acl *acl;
int error;
- if (strcmp(name, "") != 0)
- return -EINVAL;
-
v9ses = v9fs_dentry2v9ses(dentry);
/*
* We allow set/get/list of acl when access=client is not specified
*/
if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
- return v9fs_xattr_get(dentry, handler->prefix, buffer, size);
+ return v9fs_xattr_get(dentry, handler->name, buffer, size);
acl = v9fs_get_cached_acl(d_inode(dentry), handler->flags);
if (IS_ERR(acl))
@@ -250,16 +247,13 @@ static int v9fs_xattr_set_acl(const struct xattr_handler *handler,
struct v9fs_session_info *v9ses;
struct inode *inode = d_inode(dentry);
- if (strcmp(name, "") != 0)
- return -EINVAL;
-
v9ses = v9fs_dentry2v9ses(dentry);
/*
* set the attribute on the remote. Without even looking at the
* xattr value. We leave it to the server to validate
*/
if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
- return v9fs_xattr_set(dentry, handler->prefix, value, size,
+ return v9fs_xattr_set(dentry, handler->name, value, size,
flags);
if (S_ISLNK(inode->i_mode))
@@ -319,7 +313,7 @@ static int v9fs_xattr_set_acl(const struct xattr_handler *handler,
default:
BUG();
}
- retval = v9fs_xattr_set(dentry, handler->prefix, value, size, flags);
+ retval = v9fs_xattr_set(dentry, handler->name, value, size, flags);
if (!retval)
set_cached_acl(inode, handler->flags, acl);
err_out:
@@ -328,14 +322,14 @@ err_out:
}
const struct xattr_handler v9fs_xattr_acl_access_handler = {
- .prefix = POSIX_ACL_XATTR_ACCESS,
+ .name = XATTR_NAME_POSIX_ACL_ACCESS,
.flags = ACL_TYPE_ACCESS,
.get = v9fs_xattr_get_acl,
.set = v9fs_xattr_set_acl,
};
const struct xattr_handler v9fs_xattr_acl_default_handler = {
- .prefix = POSIX_ACL_XATTR_DEFAULT,
+ .name = XATTR_NAME_POSIX_ACL_DEFAULT,
.flags = ACL_TYPE_DEFAULT,
.get = v9fs_xattr_get_acl,
.set = v9fs_xattr_set_acl,
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index e3d026ac382e..9dd9b47a6c1a 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -143,8 +143,6 @@ static int v9fs_xattr_handler_get(const struct xattr_handler *handler,
{
const char *full_name = xattr_full_name(handler, name);
- if (strcmp(name, "") == 0)
- return -EINVAL;
return v9fs_xattr_get(dentry, full_name, buffer, size);
}
@@ -154,8 +152,6 @@ static int v9fs_xattr_handler_set(const struct xattr_handler *handler,
{
const char *full_name = xattr_full_name(handler, name);
- if (strcmp(name, "") == 0)
- return -EINVAL;
return v9fs_xattr_set(dentry, full_name, value, size, flags);
}
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 9a0124a95851..f89db0c21b51 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -37,10 +37,10 @@ struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
switch (type) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
+ name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
+ name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
BUG();
@@ -81,7 +81,7 @@ static int __btrfs_set_acl(struct btrfs_trans_handle *trans,
switch (type) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
+ name = XATTR_NAME_POSIX_ACL_ACCESS;
if (acl) {
ret = posix_acl_equiv_mode(acl, &inode->i_mode);
if (ret < 0)
@@ -94,7 +94,7 @@ static int __btrfs_set_acl(struct btrfs_trans_handle *trans,
case ACL_TYPE_DEFAULT:
if (!S_ISDIR(inode->i_mode))
return acl ? -EINVAL : 0;
- name = POSIX_ACL_XATTR_DEFAULT;
+ name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
return -EINVAL;
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 1a41a65fd2ff..3b8856e182ae 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3550,10 +3550,10 @@ static noinline int acls_after_inode_item(struct extent_buffer *leaf,
int scanned = 0;
if (!xattr_access) {
- xattr_access = btrfs_name_hash(POSIX_ACL_XATTR_ACCESS,
- strlen(POSIX_ACL_XATTR_ACCESS));
- xattr_default = btrfs_name_hash(POSIX_ACL_XATTR_DEFAULT,
- strlen(POSIX_ACL_XATTR_DEFAULT));
+ xattr_access = btrfs_name_hash(XATTR_NAME_POSIX_ACL_ACCESS,
+ strlen(XATTR_NAME_POSIX_ACL_ACCESS));
+ xattr_default = btrfs_name_hash(XATTR_NAME_POSIX_ACL_DEFAULT,
+ strlen(XATTR_NAME_POSIX_ACL_DEFAULT));
}
slot++;
@@ -9996,7 +9996,7 @@ static const struct inode_operations btrfs_dir_inode_operations = {
.setattr = btrfs_setattr,
.mknod = btrfs_mknod,
.setxattr = btrfs_setxattr,
- .getxattr = btrfs_getxattr,
+ .getxattr = generic_getxattr,
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
.permission = btrfs_permission,
@@ -10073,7 +10073,7 @@ static const struct inode_operations btrfs_file_inode_operations = {
.getattr = btrfs_getattr,
.setattr = btrfs_setattr,
.setxattr = btrfs_setxattr,
- .getxattr = btrfs_getxattr,
+ .getxattr = generic_getxattr,
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
.permission = btrfs_permission,
@@ -10087,7 +10087,7 @@ static const struct inode_operations btrfs_special_inode_operations = {
.setattr = btrfs_setattr,
.permission = btrfs_permission,
.setxattr = btrfs_setxattr,
- .getxattr = btrfs_getxattr,
+ .getxattr = generic_getxattr,
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
.get_acl = btrfs_get_acl,
@@ -10101,7 +10101,7 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
.setattr = btrfs_setattr,
.permission = btrfs_permission,
.setxattr = btrfs_setxattr,
- .getxattr = btrfs_getxattr,
+ .getxattr = generic_getxattr,
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
.update_time = btrfs_update_time,
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 1fcd7b6e7564..7cbef1a14fe1 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -351,137 +351,89 @@ err:
return ret;
}
-/*
- * List of handlers for synthetic system.* attributes. All real ondisk
- * attributes are handled directly.
- */
-const struct xattr_handler *btrfs_xattr_handlers[] = {
-#ifdef CONFIG_BTRFS_FS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
- NULL,
-};
-
-/*
- * Check if the attribute is in a supported namespace.
- *
- * This is applied after the check for the synthetic attributes in the system
- * namespace.
- */
-static int btrfs_is_valid_xattr(const char *name)
+static int btrfs_xattr_handler_get(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
{
- int len = strlen(name);
- int prefixlen = 0;
-
- if (!strncmp(name, XATTR_SECURITY_PREFIX,
- XATTR_SECURITY_PREFIX_LEN))
- prefixlen = XATTR_SECURITY_PREFIX_LEN;
- else if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- prefixlen = XATTR_SYSTEM_PREFIX_LEN;
- else if (!strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN))
- prefixlen = XATTR_TRUSTED_PREFIX_LEN;
- else if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
- prefixlen = XATTR_USER_PREFIX_LEN;
- else if (!strncmp(name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN))
- prefixlen = XATTR_BTRFS_PREFIX_LEN;
- else
- return -EOPNOTSUPP;
-
- /*
- * The name cannot consist of just prefix
- */
- if (len <= prefixlen)
- return -EINVAL;
+ struct inode *inode = d_inode(dentry);
- return 0;
+ name = xattr_full_name(handler, name);
+ return __btrfs_getxattr(inode, name, buffer, size);
}
-ssize_t btrfs_getxattr(struct dentry *dentry, const char *name,
- void *buffer, size_t size)
+static int btrfs_xattr_handler_set(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ const void *buffer, size_t size,
+ int flags)
{
- int ret;
+ struct inode *inode = d_inode(dentry);
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_getxattr(dentry, name, buffer, size);
+ name = xattr_full_name(handler, name);
+ return __btrfs_setxattr(NULL, inode, name, buffer, size, flags);
+}
- ret = btrfs_is_valid_xattr(name);
- if (ret)
- return ret;
- return __btrfs_getxattr(d_inode(dentry), name, buffer, size);
+static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler,
+ struct dentry *dentry,
+ const char *name, const void *value,
+ size_t size, int flags)
+{
+ name = xattr_full_name(handler, name);
+ return btrfs_set_prop(d_inode(dentry), name, value, size, flags);
}
+static const struct xattr_handler btrfs_security_xattr_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = btrfs_xattr_handler_get,
+ .set = btrfs_xattr_handler_set,
+};
+
+static const struct xattr_handler btrfs_trusted_xattr_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .get = btrfs_xattr_handler_get,
+ .set = btrfs_xattr_handler_set,
+};
+
+static const struct xattr_handler btrfs_user_xattr_handler = {
+ .prefix = XATTR_USER_PREFIX,
+ .get = btrfs_xattr_handler_get,
+ .set = btrfs_xattr_handler_set,
+};
+
+static const struct xattr_handler btrfs_btrfs_xattr_handler = {
+ .prefix = XATTR_BTRFS_PREFIX,
+ .get = btrfs_xattr_handler_get,
+ .set = btrfs_xattr_handler_set_prop,
+};
+
+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,
+ NULL,
+};
+
int btrfs_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags)
{
struct btrfs_root *root = BTRFS_I(d_inode(dentry))->root;
- int ret;
- /*
- * The permission on security.* and system.* is not checked
- * in permission().
- */
if (btrfs_root_readonly(root))
return -EROFS;
-
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_setxattr(dentry, name, value, size, flags);
-
- ret = btrfs_is_valid_xattr(name);
- if (ret)
- return ret;
-
- if (!strncmp(name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN))
- return btrfs_set_prop(d_inode(dentry), name,
- value, size, flags);
-
- if (size == 0)
- value = ""; /* empty EA, do not remove */
-
- return __btrfs_setxattr(NULL, d_inode(dentry), name, value, size,
- flags);
+ return generic_setxattr(dentry, name, value, size, flags);
}
int btrfs_removexattr(struct dentry *dentry, const char *name)
{
struct btrfs_root *root = BTRFS_I(d_inode(dentry))->root;
- int ret;
- /*
- * The permission on security.* and system.* is not checked
- * in permission().
- */
if (btrfs_root_readonly(root))
return -EROFS;
-
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_removexattr(dentry, name);
-
- ret = btrfs_is_valid_xattr(name);
- if (ret)
- return ret;
-
- if (!strncmp(name, XATTR_BTRFS_PREFIX, XATTR_BTRFS_PREFIX_LEN))
- return btrfs_set_prop(d_inode(dentry), name,
- NULL, 0, XATTR_REPLACE);
-
- return __btrfs_setxattr(NULL, d_inode(dentry), name, NULL, 0,
- XATTR_REPLACE);
+ return generic_removexattr(dentry, name);
}
static int btrfs_initxattrs(struct inode *inode,
diff --git a/fs/btrfs/xattr.h b/fs/btrfs/xattr.h
index 5049608d1388..96807b3d22f5 100644
--- a/fs/btrfs/xattr.h
+++ b/fs/btrfs/xattr.h
@@ -28,8 +28,6 @@ extern ssize_t __btrfs_getxattr(struct inode *inode, const char *name,
extern int __btrfs_setxattr(struct btrfs_trans_handle *trans,
struct inode *inode, const char *name,
const void *value, size_t size, int flags);
-extern ssize_t btrfs_getxattr(struct dentry *dentry, const char *name,
- void *buffer, size_t size);
extern int btrfs_setxattr(struct dentry *dentry, const char *name,
const void *value, size_t size, int flags);
extern int btrfs_removexattr(struct dentry *dentry, const char *name);
diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c
index 8f84646f10e9..f19708487e2f 100644
--- a/fs/ceph/acl.c
+++ b/fs/ceph/acl.c
@@ -49,10 +49,10 @@ struct posix_acl *ceph_get_acl(struct inode *inode, int type)
switch (type) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
+ name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
+ name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
BUG();
@@ -92,7 +92,7 @@ int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type)
switch (type) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
+ name = XATTR_NAME_POSIX_ACL_ACCESS;
if (acl) {
ret = posix_acl_equiv_mode(acl, &new_mode);
if (ret < 0)
@@ -106,7 +106,7 @@ int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type)
ret = acl ? -EINVAL : 0;
goto out;
}
- name = POSIX_ACL_XATTR_DEFAULT;
+ name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
ret = -EINVAL;
@@ -202,11 +202,11 @@ int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
ceph_pagelist_encode_32(pagelist, acl && default_acl ? 2 : 1);
if (acl) {
- size_t len = strlen(POSIX_ACL_XATTR_ACCESS);
+ size_t len = strlen(XATTR_NAME_POSIX_ACL_ACCESS);
err = ceph_pagelist_reserve(pagelist, len + val_size1 + 8);
if (err)
goto out_err;
- ceph_pagelist_encode_string(pagelist, POSIX_ACL_XATTR_ACCESS,
+ ceph_pagelist_encode_string(pagelist, XATTR_NAME_POSIX_ACL_ACCESS,
len);
err = posix_acl_to_xattr(&init_user_ns, acl,
tmp_buf, val_size1);
@@ -216,12 +216,12 @@ int ceph_pre_init_acls(struct inode *dir, umode_t *mode,
ceph_pagelist_append(pagelist, tmp_buf, val_size1);
}
if (default_acl) {
- size_t len = strlen(POSIX_ACL_XATTR_DEFAULT);
+ size_t len = strlen(XATTR_NAME_POSIX_ACL_DEFAULT);
err = ceph_pagelist_reserve(pagelist, len + val_size2 + 8);
if (err)
goto out_err;
err = ceph_pagelist_encode_string(pagelist,
- POSIX_ACL_XATTR_DEFAULT, len);
+ XATTR_NAME_POSIX_ACL_DEFAULT, len);
err = posix_acl_to_xattr(&init_user_ns, default_acl,
tmp_buf, val_size2);
if (err < 0)
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index ff9e1f8b16a4..f5dc2f0df4ad 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -190,8 +190,8 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
#endif /* CONFIG_CIFS_ACL */
} else {
int temp;
- temp = strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
- strlen(POSIX_ACL_XATTR_ACCESS));
+ temp = strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
+ strlen(XATTR_NAME_POSIX_ACL_ACCESS));
if (temp == 0) {
#ifdef CONFIG_CIFS_POSIX
if (sb->s_flags & MS_POSIXACL)
@@ -203,8 +203,8 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name,
#else
cifs_dbg(FYI, "set POSIX ACL not supported\n");
#endif
- } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
- strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
+ } else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
+ strlen(XATTR_NAME_POSIX_ACL_DEFAULT)) == 0) {
#ifdef CONFIG_CIFS_POSIX
if (sb->s_flags & MS_POSIXACL)
rc = CIFSSMBSetPosixACL(xid, pTcon, full_path,
@@ -292,8 +292,8 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
rc = pTcon->ses->server->ops->query_all_EAs(xid, pTcon,
full_path, ea_name, ea_value, buf_size,
cifs_sb->local_nls, cifs_remap(cifs_sb));
- } else if (strncmp(ea_name, POSIX_ACL_XATTR_ACCESS,
- strlen(POSIX_ACL_XATTR_ACCESS)) == 0) {
+ } else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_ACCESS,
+ strlen(XATTR_NAME_POSIX_ACL_ACCESS)) == 0) {
#ifdef CONFIG_CIFS_POSIX
if (sb->s_flags & MS_POSIXACL)
rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
@@ -303,8 +303,8 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name,
#else
cifs_dbg(FYI, "Query POSIX ACL not supported yet\n");
#endif /* CONFIG_CIFS_POSIX */
- } else if (strncmp(ea_name, POSIX_ACL_XATTR_DEFAULT,
- strlen(POSIX_ACL_XATTR_DEFAULT)) == 0) {
+ } else if (strncmp(ea_name, XATTR_NAME_POSIX_ACL_DEFAULT,
+ strlen(XATTR_NAME_POSIX_ACL_DEFAULT)) == 0) {
#ifdef CONFIG_CIFS_POSIX
if (sb->s_flags & MS_POSIXACL)
rc = CIFSSMBGetPosixACL(xid, pTcon, full_path,
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index fa70848afa8f..cd95d14f9cc2 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -292,16 +292,21 @@ bad_block: ext2_error(inode->i_sb, "ext2_xattr_list",
const struct xattr_handler *handler =
ext2_xattr_handler(entry->e_name_index);
- if (handler) {
- size_t size = handler->list(handler, dentry, buffer,
- rest, entry->e_name,
- entry->e_name_len);
+ if (handler && (!handler->list || handler->list(dentry))) {
+ const char *prefix = handler->prefix ?: handler->name;
+ size_t prefix_len = strlen(prefix);
+ size_t size = prefix_len + entry->e_name_len + 1;
+
if (buffer) {
if (size > rest) {
error = -ERANGE;
goto cleanup;
}
- buffer += size;
+ memcpy(buffer, prefix, prefix_len);
+ buffer += prefix_len;
+ memcpy(buffer, entry->e_name, entry->e_name_len);
+ buffer += entry->e_name_len;
+ *buffer++ = 0;
}
rest -= size;
}
diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c
index dfb08750370d..ba97f243b050 100644
--- a/fs/ext2/xattr_security.c
+++ b/fs/ext2/xattr_security.c
@@ -7,29 +7,11 @@
#include <linux/security.h>
#include "xattr.h"
-static size_t
-ext2_xattr_security_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
-{
- const int prefix_len = XATTR_SECURITY_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
- memcpy(list+prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
-}
-
static int
ext2_xattr_security_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ext2_xattr_get(d_inode(dentry), EXT2_XATTR_INDEX_SECURITY, name,
buffer, size);
}
@@ -39,8 +21,6 @@ ext2_xattr_security_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_SECURITY, name,
value, size, flags);
}
@@ -71,7 +51,6 @@ ext2_init_security(struct inode *inode, struct inode *dir,
const struct xattr_handler ext2_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
- .list = ext2_xattr_security_list,
.get = ext2_xattr_security_get,
.set = ext2_xattr_security_set,
};
diff --git a/fs/ext2/xattr_trusted.c b/fs/ext2/xattr_trusted.c
index 3150dd3a7859..2c94d1930626 100644
--- a/fs/ext2/xattr_trusted.c
+++ b/fs/ext2/xattr_trusted.c
@@ -8,23 +8,10 @@
#include "ext2.h"
#include "xattr.h"
-static size_t
-ext2_xattr_trusted_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
+static bool
+ext2_xattr_trusted_list(struct dentry *dentry)
{
- const int prefix_len = XATTR_TRUSTED_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (!capable(CAP_SYS_ADMIN))
- return 0;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
- memcpy(list+prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
+ return capable(CAP_SYS_ADMIN);
}
static int
@@ -32,8 +19,6 @@ ext2_xattr_trusted_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ext2_xattr_get(d_inode(dentry), EXT2_XATTR_INDEX_TRUSTED, name,
buffer, size);
}
@@ -43,8 +28,6 @@ ext2_xattr_trusted_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ext2_xattr_set(d_inode(dentry), EXT2_XATTR_INDEX_TRUSTED, name,
value, size, flags);
}
diff --git a/fs/ext2/xattr_user.c b/fs/ext2/xattr_user.c
index 339a49bbb8ef..72a2a96d677f 100644
--- a/fs/ext2/xattr_user.c
+++ b/fs/ext2/xattr_user.c
@@ -10,23 +10,10 @@
#include "ext2.h"
#include "xattr.h"
-static size_t
-ext2_xattr_user_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
+static bool
+ext2_xattr_user_list(struct dentry *dentry)
{
- const size_t prefix_len = XATTR_USER_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (!test_opt(dentry->d_sb, XATTR_USER))
- return 0;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_USER_PREFIX, prefix_len);
- memcpy(list+prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
+ return test_opt(dentry->d_sb, XATTR_USER);
}
static int
@@ -34,8 +21,6 @@ ext2_xattr_user_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
if (!test_opt(dentry->d_sb, XATTR_USER))
return -EOPNOTSUPP;
return ext2_xattr_get(d_inode(dentry), EXT2_XATTR_INDEX_USER,
@@ -47,8 +32,6 @@ ext2_xattr_user_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
if (!test_opt(dentry->d_sb, XATTR_USER))
return -EOPNOTSUPP;
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 6b6b3e751f8c..e9b9afdd1d96 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -404,19 +404,24 @@ ext4_xattr_list_entries(struct dentry *dentry, struct ext4_xattr_entry *entry,
const struct xattr_handler *handler =
ext4_xattr_handler(entry->e_name_index);
- if (handler) {
- size_t size = handler->list(handler, dentry, buffer,
- rest, entry->e_name,
- entry->e_name_len);
+ if (handler && (!handler->list || handler->list(dentry))) {
+ const char *prefix = handler->prefix ?: handler->name;
+ size_t prefix_len = strlen(prefix);
+ size_t size = prefix_len + entry->e_name_len + 1;
+
if (buffer) {
if (size > rest)
return -ERANGE;
- buffer += size;
+ memcpy(buffer, prefix, prefix_len);
+ buffer += prefix_len;
+ memcpy(buffer, entry->e_name, entry->e_name_len);
+ buffer += entry->e_name_len;
+ *buffer++ = 0;
}
rest -= size;
}
}
- return buffer_size - rest;
+ return buffer_size - rest; /* total size */
}
static int
diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c
index 36f4c1a84c21..3e81bdca071a 100644
--- a/fs/ext4/xattr_security.c
+++ b/fs/ext4/xattr_security.c
@@ -11,30 +11,11 @@
#include "ext4.h"
#include "xattr.h"
-static size_t
-ext4_xattr_security_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
-{
- const size_t prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
- const size_t total_len = prefix_len + name_len + 1;
-
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
- memcpy(list+prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
-}
-
static int
ext4_xattr_security_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ext4_xattr_get(d_inode(dentry), EXT4_XATTR_INDEX_SECURITY,
name, buffer, size);
}
@@ -44,8 +25,6 @@ ext4_xattr_security_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ext4_xattr_set(d_inode(dentry), EXT4_XATTR_INDEX_SECURITY,
name, value, size, flags);
}
@@ -79,7 +58,6 @@ ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
const struct xattr_handler ext4_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
- .list = ext4_xattr_security_list,
.get = ext4_xattr_security_get,
.set = ext4_xattr_security_set,
};
diff --git a/fs/ext4/xattr_trusted.c b/fs/ext4/xattr_trusted.c
index 488089053342..2a3c6f9b8cb8 100644
--- a/fs/ext4/xattr_trusted.c
+++ b/fs/ext4/xattr_trusted.c
@@ -12,23 +12,10 @@
#include "ext4.h"
#include "xattr.h"
-static size_t
-ext4_xattr_trusted_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
+static bool
+ext4_xattr_trusted_list(struct dentry *dentry)
{
- const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (!capable(CAP_SYS_ADMIN))
- return 0;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
- memcpy(list+prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
+ return capable(CAP_SYS_ADMIN);
}
static int
@@ -36,8 +23,6 @@ ext4_xattr_trusted_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name, void *buffer,
size_t size)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ext4_xattr_get(d_inode(dentry), EXT4_XATTR_INDEX_TRUSTED,
name, buffer, size);
}
@@ -47,8 +32,6 @@ ext4_xattr_trusted_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ext4_xattr_set(d_inode(dentry), EXT4_XATTR_INDEX_TRUSTED,
name, value, size, flags);
}
diff --git a/fs/ext4/xattr_user.c b/fs/ext4/xattr_user.c
index d2dec3364062..d152f431e432 100644
--- a/fs/ext4/xattr_user.c
+++ b/fs/ext4/xattr_user.c
@@ -11,23 +11,10 @@
#include "ext4.h"
#include "xattr.h"
-static size_t
-ext4_xattr_user_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
+static bool
+ext4_xattr_user_list(struct dentry *dentry)
{
- const size_t prefix_len = XATTR_USER_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (!test_opt(dentry->d_sb, XATTR_USER))
- return 0;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_USER_PREFIX, prefix_len);
- memcpy(list+prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
+ return test_opt(dentry->d_sb, XATTR_USER);
}
static int
@@ -35,8 +22,6 @@ ext4_xattr_user_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
if (!test_opt(dentry->d_sb, XATTR_USER))
return -EOPNOTSUPP;
return ext4_xattr_get(d_inode(dentry), EXT4_XATTR_INDEX_USER,
@@ -48,8 +33,6 @@ ext4_xattr_user_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
if (!test_opt(dentry->d_sb, XATTR_USER))
return -EOPNOTSUPP;
return ext4_xattr_set(d_inode(dentry), EXT4_XATTR_INDEX_USER,
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 862368a32e53..036952a945fa 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -25,38 +25,6 @@
#include "f2fs.h"
#include "xattr.h"
-static size_t f2fs_xattr_generic_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t len)
-{
- struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
- int total_len, prefix_len;
-
- switch (handler->flags) {
- case F2FS_XATTR_INDEX_USER:
- if (!test_opt(sbi, XATTR_USER))
- return -EOPNOTSUPP;
- break;
- case F2FS_XATTR_INDEX_TRUSTED:
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- break;
- case F2FS_XATTR_INDEX_SECURITY:
- break;
- default:
- return -EINVAL;
- }
-
- prefix_len = strlen(handler->prefix);
- total_len = prefix_len + len + 1;
- if (list && total_len <= list_size) {
- memcpy(list, handler->prefix, prefix_len);
- memcpy(list + prefix_len, name, len);
- list[prefix_len + len] = '\0';
- }
- return total_len;
-}
-
static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name, void *buffer,
size_t size)
@@ -77,8 +45,6 @@ static int f2fs_xattr_generic_get(const struct xattr_handler *handler,
default:
return -EINVAL;
}
- if (strcmp(name, "") == 0)
- return -EINVAL;
return f2fs_getxattr(d_inode(dentry), handler->flags, name,
buffer, size, NULL);
}
@@ -103,24 +69,20 @@ static int f2fs_xattr_generic_set(const struct xattr_handler *handler,
default:
return -EINVAL;
}
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
return f2fs_setxattr(d_inode(dentry), handler->flags, name,
value, size, NULL, flags);
}
-static size_t f2fs_xattr_advise_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t len)
+static bool f2fs_xattr_user_list(struct dentry *dentry)
{
- const char *xname = F2FS_SYSTEM_ADVISE_PREFIX;
- size_t size;
+ struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
- size = strlen(xname) + 1;
- if (list && size <= list_size)
- memcpy(list, xname, size);
- return size;
+ return test_opt(sbi, XATTR_USER);
+}
+
+static bool f2fs_xattr_trusted_list(struct dentry *dentry)
+{
+ return capable(CAP_SYS_ADMIN);
}
static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
@@ -129,9 +91,6 @@ static int f2fs_xattr_advise_get(const struct xattr_handler *handler,
{
struct inode *inode = d_inode(dentry);
- if (strcmp(name, "") != 0)
- return -EINVAL;
-
if (buffer)
*((char *)buffer) = F2FS_I(inode)->i_advise;
return sizeof(char);
@@ -143,8 +102,6 @@ static int f2fs_xattr_advise_set(const struct xattr_handler *handler,
{
struct inode *inode = d_inode(dentry);
- if (strcmp(name, "") != 0)
- return -EINVAL;
if (!inode_owner_or_capable(inode))
return -EPERM;
if (value == NULL)
@@ -183,7 +140,7 @@ int f2fs_init_security(struct inode *inode, struct inode *dir,
const struct xattr_handler f2fs_xattr_user_handler = {
.prefix = XATTR_USER_PREFIX,
.flags = F2FS_XATTR_INDEX_USER,
- .list = f2fs_xattr_generic_list,
+ .list = f2fs_xattr_user_list,
.get = f2fs_xattr_generic_get,
.set = f2fs_xattr_generic_set,
};
@@ -191,15 +148,14 @@ const struct xattr_handler f2fs_xattr_user_handler = {
const struct xattr_handler f2fs_xattr_trusted_handler = {
.prefix = XATTR_TRUSTED_PREFIX,
.flags = F2FS_XATTR_INDEX_TRUSTED,
- .list = f2fs_xattr_generic_list,
+ .list = f2fs_xattr_trusted_list,
.get = f2fs_xattr_generic_get,
.set = f2fs_xattr_generic_set,
};
const struct xattr_handler f2fs_xattr_advise_handler = {
- .prefix = F2FS_SYSTEM_ADVISE_PREFIX,
+ .name = F2FS_SYSTEM_ADVISE_NAME,
.flags = F2FS_XATTR_INDEX_ADVISE,
- .list = f2fs_xattr_advise_list,
.get = f2fs_xattr_advise_get,
.set = f2fs_xattr_advise_set,
};
@@ -207,7 +163,6 @@ const struct xattr_handler f2fs_xattr_advise_handler = {
const struct xattr_handler f2fs_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.flags = F2FS_XATTR_INDEX_SECURITY,
- .list = f2fs_xattr_generic_list,
.get = f2fs_xattr_generic_get,
.set = f2fs_xattr_generic_set,
};
@@ -455,20 +410,27 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
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;
- if (!handler)
+ if (!handler || (handler->list && !handler->list(dentry)))
continue;
- size = handler->list(handler, dentry, buffer, rest,
- entry->e_name, entry->e_name_len);
- if (buffer && size > rest) {
- error = -ERANGE;
- goto cleanup;
+ prefix = handler->prefix ?: handler->name;
+ prefix_len = strlen(prefix);
+ size = prefix_len + entry->e_name_len + 1;
+ if (buffer) {
+ if (size > rest) {
+ error = -ERANGE;
+ goto cleanup;
+ }
+ memcpy(buffer, prefix, prefix_len);
+ buffer += prefix_len;
+ memcpy(buffer, entry->e_name, entry->e_name_len);
+ buffer += entry->e_name_len;
+ *buffer++ = 0;
}
-
- if (buffer)
- buffer += size;
rest -= size;
}
error = buffer_size - rest;
diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h
index 71a7100d5492..79dccc8252dd 100644
--- a/fs/f2fs/xattr.h
+++ b/fs/f2fs/xattr.h
@@ -27,7 +27,7 @@
#define F2FS_XATTR_REFCOUNT_MAX 1024
/* Name indexes */
-#define F2FS_SYSTEM_ADVISE_PREFIX "system.advise"
+#define F2FS_SYSTEM_ADVISE_NAME "system.advise"
#define F2FS_XATTR_INDEX_USER 1
#define F2FS_XATTR_INDEX_POSIX_ACL_ACCESS 2
#define F2FS_XATTR_INDEX_POSIX_ACL_DEFAULT 3
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 1be3b061c05c..791932617d1a 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -31,9 +31,9 @@ static const char *gfs2_acl_name(int type)
{
switch (type) {
case ACL_TYPE_ACCESS:
- return GFS2_POSIX_ACL_ACCESS;
+ return XATTR_POSIX_ACL_ACCESS;
case ACL_TYPE_DEFAULT:
- return GFS2_POSIX_ACL_DEFAULT;
+ return XATTR_POSIX_ACL_DEFAULT;
}
return NULL;
}
diff --git a/fs/gfs2/acl.h b/fs/gfs2/acl.h
index 2d65ec4cd4be..3af4f407a483 100644
--- a/fs/gfs2/acl.h
+++ b/fs/gfs2/acl.h
@@ -12,8 +12,6 @@
#include "incore.h"
-#define GFS2_POSIX_ACL_ACCESS "posix_acl_access"
-#define GFS2_POSIX_ACL_DEFAULT "posix_acl_default"
#define GFS2_ACL_MAX_ENTRIES(sdp) ((300 << (sdp)->sd_sb.sb_bsize_shift) >> 12)
extern struct posix_acl *gfs2_get_acl(struct inode *inode, int type);
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index 53ce76a374fe..84f2d81fe451 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -1237,56 +1237,6 @@ static int gfs2_xattr_set(const struct xattr_handler *handler,
size, flags, handler->flags);
}
-
-static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
- struct gfs2_ea_header *ea, char *data)
-{
- struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
- unsigned int amount = GFS2_EA_DATA_LEN(ea);
- unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
- int ret;
-
- ret = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
- if (ret)
- return ret;
-
- ret = gfs2_iter_unstuffed(ip, ea, data, NULL);
- gfs2_trans_end(sdp);
-
- return ret;
-}
-
-int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
-{
- struct inode *inode = &ip->i_inode;
- struct gfs2_sbd *sdp = GFS2_SB(inode);
- struct gfs2_ea_location el;
- int error;
-
- error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
- if (error)
- return error;
-
- if (GFS2_EA_IS_STUFFED(el.el_ea)) {
- error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
- if (error == 0) {
- gfs2_trans_add_meta(ip->i_gl, el.el_bh);
- memcpy(GFS2_EA2DATA(el.el_ea), data,
- GFS2_EA_DATA_LEN(el.el_ea));
- }
- } else {
- error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
- }
-
- brelse(el.el_bh);
- if (error)
- return error;
-
- error = gfs2_setattr_simple(inode, attr);
- gfs2_trans_end(sdp);
- return error;
-}
-
static int ea_dealloc_indirect(struct gfs2_inode *ip)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
diff --git a/fs/gfs2/xattr.h b/fs/gfs2/xattr.h
index d392f8358f2f..2d887c88eb49 100644
--- a/fs/gfs2/xattr.h
+++ b/fs/gfs2/xattr.h
@@ -62,6 +62,5 @@ extern int gfs2_ea_dealloc(struct gfs2_inode *ip);
/* Exported to acl.c */
extern int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **data);
-extern int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data);
#endif /* __EATTR_DOT_H__ */
diff --git a/fs/hfsplus/posix_acl.c b/fs/hfsplus/posix_acl.c
index df0c9af68d05..afb33eda6d7d 100644
--- a/fs/hfsplus/posix_acl.c
+++ b/fs/hfsplus/posix_acl.c
@@ -21,10 +21,10 @@ struct posix_acl *hfsplus_get_posix_acl(struct inode *inode, int type)
switch (type) {
case ACL_TYPE_ACCESS:
- xattr_name = POSIX_ACL_XATTR_ACCESS;
+ xattr_name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
- xattr_name = POSIX_ACL_XATTR_DEFAULT;
+ xattr_name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
return ERR_PTR(-EINVAL);
@@ -66,7 +66,7 @@ int hfsplus_set_posix_acl(struct inode *inode, struct posix_acl *acl,
switch (type) {
case ACL_TYPE_ACCESS:
- xattr_name = POSIX_ACL_XATTR_ACCESS;
+ xattr_name = XATTR_NAME_POSIX_ACL_ACCESS;
if (acl) {
err = posix_acl_equiv_mode(acl, &inode->i_mode);
if (err < 0)
@@ -76,7 +76,7 @@ int hfsplus_set_posix_acl(struct inode *inode, struct posix_acl *acl,
break;
case ACL_TYPE_DEFAULT:
- xattr_name = POSIX_ACL_XATTR_DEFAULT;
+ xattr_name = XATTR_NAME_POSIX_ACL_DEFAULT;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c
index e41a010cd89c..ab01530b4930 100644
--- a/fs/hfsplus/xattr.c
+++ b/fs/hfsplus/xattr.c
@@ -431,9 +431,6 @@ int hfsplus_setxattr(struct dentry *dentry, const char *name,
char *xattr_name;
int res;
- if (!strcmp(name, ""))
- return -EINVAL;
-
xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
GFP_KERNEL);
if (!xattr_name)
@@ -589,9 +586,6 @@ ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
int res;
char *xattr_name;
- if (!strcmp(name, ""))
- return -EINVAL;
-
xattr_name = kmalloc(NLS_MAX_CHARSET_SIZE * HFSPLUS_ATTR_MAX_STRLEN + 1,
GFP_KERNEL);
if (!xattr_name)
@@ -853,9 +847,6 @@ static int hfsplus_osx_getxattr(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (!strcmp(name, ""))
- return -EINVAL;
-
/*
* Don't allow retrieving properly prefixed attributes
* by prepending them with "osx."
@@ -876,9 +867,6 @@ static int hfsplus_osx_setxattr(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags)
{
- if (!strcmp(name, ""))
- return -EINVAL;
-
/*
* Don't allow setting properly prefixed attributes
* by prepending them with "osx."
diff --git a/fs/jffs2/security.c b/fs/jffs2/security.c
index bf12fe5f83d7..7a28facd7175 100644
--- a/fs/jffs2/security.c
+++ b/fs/jffs2/security.c
@@ -52,9 +52,6 @@ static int jffs2_security_getxattr(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (!strcmp(name, ""))
- return -EINVAL;
-
return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_SECURITY,
name, buffer, size);
}
@@ -63,31 +60,12 @@ static int jffs2_security_setxattr(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags)
{
- if (!strcmp(name, ""))
- return -EINVAL;
-
return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_SECURITY,
name, buffer, size, flags);
}
-static size_t jffs2_security_listxattr(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_size, const char *name,
- size_t name_len)
-{
- size_t retlen = XATTR_SECURITY_PREFIX_LEN + name_len + 1;
-
- if (list && retlen <= list_size) {
- strcpy(list, XATTR_SECURITY_PREFIX);
- strcpy(list + XATTR_SECURITY_PREFIX_LEN, name);
- }
-
- return retlen;
-}
-
const struct xattr_handler jffs2_security_xattr_handler = {
.prefix = XATTR_SECURITY_PREFIX,
- .list = jffs2_security_listxattr,
.set = jffs2_security_setxattr,
.get = jffs2_security_getxattr
};
diff --git a/fs/jffs2/xattr.c b/fs/jffs2/xattr.c
index 4c2c03663533..da3e18503c65 100644
--- a/fs/jffs2/xattr.c
+++ b/fs/jffs2/xattr.c
@@ -967,7 +967,8 @@ ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
struct jffs2_xattr_ref *ref, **pref;
struct jffs2_xattr_datum *xd;
const struct xattr_handler *xhandle;
- ssize_t len, rc;
+ const char *prefix;
+ ssize_t prefix_len, len, rc;
int retry = 0;
rc = check_xattr_ref_inode(c, ic);
@@ -998,18 +999,23 @@ ssize_t jffs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
}
}
xhandle = xprefix_to_handler(xd->xprefix);
- if (!xhandle)
+ if (!xhandle || (xhandle->list && !xhandle->list(dentry)))
continue;
+ prefix = xhandle->prefix ?: xhandle->name;
+ prefix_len = strlen(prefix);
+ rc = prefix_len + xd->name_len + 1;
+
if (buffer) {
- rc = xhandle->list(xhandle, dentry, buffer + len,
- size - len, xd->xname,
- xd->name_len);
- } else {
- rc = xhandle->list(xhandle, dentry, NULL, 0,
- xd->xname, xd->name_len);
+ if (rc > size - len) {
+ rc = -ERANGE;
+ goto out;
+ }
+ memcpy(buffer, prefix, prefix_len);
+ buffer += prefix_len;
+ memcpy(buffer, xd->xname, xd->name_len);
+ buffer += xd->name_len;
+ *buffer++ = 0;
}
- if (rc < 0)
- goto out;
len += rc;
}
rc = len;
diff --git a/fs/jffs2/xattr_trusted.c b/fs/jffs2/xattr_trusted.c
index a562da0d6a26..b2555ef07a12 100644
--- a/fs/jffs2/xattr_trusted.c
+++ b/fs/jffs2/xattr_trusted.c
@@ -20,8 +20,6 @@ static int jffs2_trusted_getxattr(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (!strcmp(name, ""))
- return -EINVAL;
return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED,
name, buffer, size);
}
@@ -30,28 +28,13 @@ static int jffs2_trusted_setxattr(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags)
{
- if (!strcmp(name, ""))
- return -EINVAL;
return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_TRUSTED,
name, buffer, size, flags);
}
-static size_t jffs2_trusted_listxattr(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_size, const char *name,
- size_t name_len)
+static bool jffs2_trusted_listxattr(struct dentry *dentry)
{
- size_t retlen = XATTR_TRUSTED_PREFIX_LEN + name_len + 1;
-
- if (!capable(CAP_SYS_ADMIN))
- return 0;
-
- if (list && retlen<=list_size) {
- strcpy(list, XATTR_TRUSTED_PREFIX);
- strcpy(list + XATTR_TRUSTED_PREFIX_LEN, name);
- }
-
- return retlen;
+ return capable(CAP_SYS_ADMIN);
}
const struct xattr_handler jffs2_trusted_xattr_handler = {
diff --git a/fs/jffs2/xattr_user.c b/fs/jffs2/xattr_user.c
index cbc0472e59a8..539bd630b5e4 100644
--- a/fs/jffs2/xattr_user.c
+++ b/fs/jffs2/xattr_user.c
@@ -20,8 +20,6 @@ static int jffs2_user_getxattr(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (!strcmp(name, ""))
- return -EINVAL;
return do_jffs2_getxattr(d_inode(dentry), JFFS2_XPREFIX_USER,
name, buffer, size);
}
@@ -30,30 +28,12 @@ static int jffs2_user_setxattr(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *buffer, size_t size, int flags)
{
- if (!strcmp(name, ""))
- return -EINVAL;
return do_jffs2_setxattr(d_inode(dentry), JFFS2_XPREFIX_USER,
name, buffer, size, flags);
}
-static size_t jffs2_user_listxattr(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_size, const char *name,
- size_t name_len)
-{
- size_t retlen = XATTR_USER_PREFIX_LEN + name_len + 1;
-
- if (list && retlen <= list_size) {
- strcpy(list, XATTR_USER_PREFIX);
- strcpy(list + XATTR_USER_PREFIX_LEN, name);
- }
-
- return retlen;
-}
-
const struct xattr_handler jffs2_user_xattr_handler = {
.prefix = XATTR_USER_PREFIX,
- .list = jffs2_user_listxattr,
.set = jffs2_user_setxattr,
.get = jffs2_user_getxattr
};
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 0c8ca830b113..49456853e9de 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -40,10 +40,10 @@ struct posix_acl *jfs_get_acl(struct inode *inode, int type)
switch(type) {
case ACL_TYPE_ACCESS:
- ea_name = POSIX_ACL_XATTR_ACCESS;
+ ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
- ea_name = POSIX_ACL_XATTR_DEFAULT;
+ ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
return ERR_PTR(-EINVAL);
@@ -82,7 +82,7 @@ static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
switch (type) {
case ACL_TYPE_ACCESS:
- ea_name = POSIX_ACL_XATTR_ACCESS;
+ ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
if (acl) {
rc = posix_acl_equiv_mode(acl, &inode->i_mode);
if (rc < 0)
@@ -94,7 +94,7 @@ static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
}
break;
case ACL_TYPE_DEFAULT:
- ea_name = POSIX_ACL_XATTR_DEFAULT;
+ ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
return -EINVAL;
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 756dd56aaf60..16405ae88d2d 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -205,7 +205,7 @@ int kernfs_iop_removexattr(struct dentry *dentry, const char *name)
if (!attrs)
return -ENOMEM;
- return simple_xattr_remove(&attrs->xattrs, name);
+ return simple_xattr_set(&attrs->xattrs, name, NULL, 0, XATTR_REPLACE);
}
ssize_t kernfs_iop_getxattr(struct dentry *dentry, const char *name, void *buf,
@@ -230,7 +230,7 @@ ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size)
if (!attrs)
return -ENOMEM;
- return simple_xattr_list(&attrs->xattrs, buf, size);
+ return simple_xattr_list(d_inode(dentry), &attrs->xattrs, buf, size);
}
static inline void set_default_inode_attr(struct inode *inode, umode_t mode)
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 1ebe2fc7cda2..17c0fa1eccfa 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -284,12 +284,12 @@ nfs3_listxattr(struct dentry *dentry, char *data, size_t size)
int error;
error = nfs3_list_one_acl(inode, ACL_TYPE_ACCESS,
- POSIX_ACL_XATTR_ACCESS, data, size, &result);
+ XATTR_NAME_POSIX_ACL_ACCESS, data, size, &result);
if (error)
return error;
error = nfs3_list_one_acl(inode, ACL_TYPE_DEFAULT,
- POSIX_ACL_XATTR_DEFAULT, data, size, &result);
+ XATTR_NAME_POSIX_ACL_DEFAULT, data, size, &result);
if (error)
return error;
return result;
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 89818036f035..c57d1332c1c8 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -6253,9 +6253,6 @@ static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
const void *buf, size_t buflen,
int flags)
{
- if (strcmp(key, "") != 0)
- return -EINVAL;
-
return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
}
@@ -6263,32 +6260,15 @@ static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
struct dentry *dentry, const char *key,
void *buf, size_t buflen)
{
- if (strcmp(key, "") != 0)
- return -EINVAL;
-
return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
}
-static size_t nfs4_xattr_list_nfs4_acl(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_len, const char *name,
- size_t name_len)
+static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
{
- size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
-
- if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
- return 0;
-
- if (list && len <= list_len)
- memcpy(list, XATTR_NAME_NFSV4_ACL, len);
- return len;
+ return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
}
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
-static inline int nfs4_server_supports_labels(struct nfs_server *server)
-{
- return server->caps & NFS_CAP_SECURITY_LABEL;
-}
static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
struct dentry *dentry, const char *key,
@@ -6310,29 +6290,34 @@ static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
return -EOPNOTSUPP;
}
-static size_t nfs4_xattr_list_nfs4_label(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_len, const char *name,
- size_t name_len)
+static ssize_t
+nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
{
- size_t len = 0;
+ int len = 0;
- if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
- len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
- if (list && len <= list_len)
- security_inode_listsecurity(d_inode(dentry), list, len);
+ if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
+ len = security_inode_listsecurity(inode, list, list_len);
+ if (list_len && len > list_len)
+ return -ERANGE;
}
return len;
}
static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
.prefix = XATTR_SECURITY_PREFIX,
- .list = nfs4_xattr_list_nfs4_label,
.get = nfs4_xattr_get_nfs4_label,
.set = nfs4_xattr_set_nfs4_label,
};
-#endif
+#else
+
+static ssize_t
+nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
+{
+ return 0;
+}
+
+#endif
/*
* nfs_fhget will use either the mounted_on_fileid or the fileid
@@ -8749,6 +8734,24 @@ const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
#endif
};
+ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
+{
+ ssize_t error, error2;
+
+ error = generic_listxattr(dentry, list, size);
+ if (error < 0)
+ return error;
+ if (list) {
+ list += error;
+ size -= error;
+ }
+
+ error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
+ if (error2 < 0)
+ return error2;
+ return error + error2;
+}
+
static const struct inode_operations nfs4_dir_inode_operations = {
.create = nfs_create,
.lookup = nfs_lookup,
@@ -8765,7 +8768,7 @@ static const struct inode_operations nfs4_dir_inode_operations = {
.setattr = nfs_setattr,
.getxattr = generic_getxattr,
.setxattr = generic_setxattr,
- .listxattr = generic_listxattr,
+ .listxattr = nfs4_listxattr,
.removexattr = generic_removexattr,
};
@@ -8775,7 +8778,7 @@ static const struct inode_operations nfs4_file_inode_operations = {
.setattr = nfs_setattr,
.getxattr = generic_getxattr,
.setxattr = generic_setxattr,
- .listxattr = generic_listxattr,
+ .listxattr = nfs4_listxattr,
.removexattr = generic_removexattr,
};
@@ -8834,7 +8837,7 @@ const struct nfs_rpc_ops nfs_v4_clientops = {
};
static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
- .prefix = XATTR_NAME_NFSV4_ACL,
+ .name = XATTR_NAME_NFSV4_ACL,
.list = nfs4_xattr_list_nfs4_acl,
.get = nfs4_xattr_get_nfs4_acl,
.set = nfs4_xattr_set_nfs4_acl,
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index e9164f09841b..f0e241ffd94f 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -544,8 +544,7 @@ static inline const char *ocfs2_xattr_prefix(int name_index)
if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
handler = ocfs2_xattr_handler_map[name_index];
-
- return handler ? handler->prefix : NULL;
+ return handler ? xattr_prefix(handler) : NULL;
}
static u32 ocfs2_xattr_name_hash(struct inode *inode,
@@ -884,14 +883,39 @@ static int ocfs2_xattr_value_truncate(struct inode *inode,
return ret;
}
-static int ocfs2_xattr_list_entry(char *buffer, size_t size,
- size_t *result, const char *prefix,
+static int ocfs2_xattr_list_entry(struct super_block *sb,
+ char *buffer, size_t size,
+ size_t *result, int type,
const char *name, int name_len)
{
char *p = buffer + *result;
- int prefix_len = strlen(prefix);
- int total_len = prefix_len + name_len + 1;
+ const char *prefix;
+ int prefix_len;
+ int total_len;
+ switch(type) {
+ case OCFS2_XATTR_INDEX_USER:
+ if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
+ return 0;
+ break;
+
+ case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS:
+ case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT:
+ if (!(sb->s_flags & MS_POSIXACL))
+ return 0;
+ break;
+
+ case OCFS2_XATTR_INDEX_TRUSTED:
+ if (!capable(CAP_SYS_ADMIN))
+ return 0;
+ break;
+ }
+
+ prefix = ocfs2_xattr_prefix(type);
+ if (!prefix)
+ return 0;
+ prefix_len = strlen(prefix);
+ total_len = prefix_len + name_len + 1;
*result += total_len;
/* we are just looking for how big our buffer needs to be */
@@ -914,23 +938,20 @@ static int ocfs2_xattr_list_entries(struct inode *inode,
{
size_t result = 0;
int i, type, ret;
- const char *prefix, *name;
+ const char *name;
for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
type = ocfs2_xattr_get_type(entry);
- prefix = ocfs2_xattr_prefix(type);
-
- if (prefix) {
- name = (const char *)header +
- le16_to_cpu(entry->xe_name_offset);
+ name = (const char *)header +
+ le16_to_cpu(entry->xe_name_offset);
- ret = ocfs2_xattr_list_entry(buffer, buffer_size,
- &result, prefix, name,
- entry->xe_name_len);
- if (ret)
- return ret;
- }
+ ret = ocfs2_xattr_list_entry(inode->i_sb,
+ buffer, buffer_size,
+ &result, type, name,
+ entry->xe_name_len);
+ if (ret)
+ return ret;
}
return result;
@@ -4033,32 +4054,30 @@ static int ocfs2_list_xattr_bucket(struct inode *inode,
int ret = 0, type;
struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
int i, block_off, new_offset;
- const char *prefix, *name;
+ const char *name;
for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
type = ocfs2_xattr_get_type(entry);
- prefix = ocfs2_xattr_prefix(type);
- if (prefix) {
- ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
- bucket_xh(bucket),
- i,
- &block_off,
- &new_offset);
- if (ret)
- break;
+ ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
+ bucket_xh(bucket),
+ i,
+ &block_off,
+ &new_offset);
+ if (ret)
+ break;
- name = (const char *)bucket_block(bucket, block_off) +
- new_offset;
- ret = ocfs2_xattr_list_entry(xl->buffer,
- xl->buffer_size,
- &xl->result,
- prefix, name,
- entry->xe_name_len);
- if (ret)
- break;
- }
+ name = (const char *)bucket_block(bucket, block_off) +
+ new_offset;
+ ret = ocfs2_xattr_list_entry(inode->i_sb,
+ xl->buffer,
+ xl->buffer_size,
+ &xl->result,
+ type, name,
+ entry->xe_name_len);
+ if (ret)
+ break;
}
return ret;
@@ -7226,31 +7245,14 @@ int ocfs2_init_security_and_acl(struct inode *dir,
leave:
return ret;
}
+
/*
* 'security' attributes support
*/
-static size_t ocfs2_xattr_security_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_size, const char *name,
- size_t name_len)
-{
- const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
- memcpy(list + prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
-}
-
static int ocfs2_xattr_security_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ocfs2_xattr_get(d_inode(dentry), OCFS2_XATTR_INDEX_SECURITY,
name, buffer, size);
}
@@ -7259,9 +7261,6 @@ static int ocfs2_xattr_security_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
return ocfs2_xattr_set(d_inode(dentry), OCFS2_XATTR_INDEX_SECURITY,
name, value, size, flags);
}
@@ -7314,7 +7313,6 @@ int ocfs2_init_security_set(handle_t *handle,
const struct xattr_handler ocfs2_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
- .list = ocfs2_xattr_security_list,
.get = ocfs2_xattr_security_get,
.set = ocfs2_xattr_security_set,
};
@@ -7322,31 +7320,10 @@ const struct xattr_handler ocfs2_xattr_security_handler = {
/*
* 'trusted' attributes support
*/
-static size_t ocfs2_xattr_trusted_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_size, const char *name,
- size_t name_len)
-{
- const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
-
- if (!capable(CAP_SYS_ADMIN))
- return 0;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
- memcpy(list + prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
-}
-
static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
return ocfs2_xattr_get(d_inode(dentry), OCFS2_XATTR_INDEX_TRUSTED,
name, buffer, size);
}
@@ -7355,16 +7332,12 @@ static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
return ocfs2_xattr_set(d_inode(dentry), OCFS2_XATTR_INDEX_TRUSTED,
name, value, size, flags);
}
const struct xattr_handler ocfs2_xattr_trusted_handler = {
.prefix = XATTR_TRUSTED_PREFIX,
- .list = ocfs2_xattr_trusted_list,
.get = ocfs2_xattr_trusted_get,
.set = ocfs2_xattr_trusted_set,
};
@@ -7372,34 +7345,12 @@ const struct xattr_handler ocfs2_xattr_trusted_handler = {
/*
* 'user' attributes support
*/
-static size_t ocfs2_xattr_user_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list,
- size_t list_size, const char *name,
- size_t name_len)
-{
- const size_t prefix_len = XATTR_USER_PREFIX_LEN;
- const size_t total_len = prefix_len + name_len + 1;
- struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
-
- if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
- return 0;
-
- if (list && total_len <= list_size) {
- memcpy(list, XATTR_USER_PREFIX, prefix_len);
- memcpy(list + prefix_len, name, name_len);
- list[prefix_len + name_len] = '\0';
- }
- return total_len;
-}
-
static int ocfs2_xattr_user_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
- if (strcmp(name, "") == 0)
- return -EINVAL;
if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
return -EOPNOTSUPP;
return ocfs2_xattr_get(d_inode(dentry), OCFS2_XATTR_INDEX_USER, name,
@@ -7412,8 +7363,6 @@ static int ocfs2_xattr_user_set(const struct xattr_handler *handler,
{
struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
- if (strcmp(name, "") == 0)
- return -EINVAL;
if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
return -EOPNOTSUPP;
@@ -7423,7 +7372,6 @@ static int ocfs2_xattr_user_set(const struct xattr_handler *handler,
const struct xattr_handler ocfs2_xattr_user_handler = {
.prefix = XATTR_USER_PREFIX,
- .list = ocfs2_xattr_user_list,
.get = ocfs2_xattr_user_get,
.set = ocfs2_xattr_user_set,
};
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 4adde1e2cbec..711dd5170376 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -769,8 +769,6 @@ posix_acl_xattr_get(const struct xattr_handler *handler,
struct posix_acl *acl;
int error;
- if (strcmp(name, "") != 0)
- return -EINVAL;
if (!IS_POSIXACL(d_backing_inode(dentry)))
return -EOPNOTSUPP;
if (d_is_symlink(dentry))
@@ -797,8 +795,6 @@ posix_acl_xattr_set(const struct xattr_handler *handler,
struct posix_acl *acl = NULL;
int ret;
- if (strcmp(name, "") != 0)
- return -EINVAL;
if (!IS_POSIXACL(inode))
return -EOPNOTSUPP;
if (!inode->i_op->set_acl)
@@ -827,25 +823,14 @@ out:
return ret;
}
-static size_t
-posix_acl_xattr_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
+static bool
+posix_acl_xattr_list(struct dentry *dentry)
{
- const char *xname = handler->prefix;
- size_t size;
-
- if (!IS_POSIXACL(d_backing_inode(dentry)))
- return 0;
-
- size = strlen(xname) + 1;
- if (list && size <= list_size)
- memcpy(list, xname, size);
- return size;
+ return IS_POSIXACL(d_backing_inode(dentry));
}
const struct xattr_handler posix_acl_access_xattr_handler = {
- .prefix = POSIX_ACL_XATTR_ACCESS,
+ .name = XATTR_NAME_POSIX_ACL_ACCESS,
.flags = ACL_TYPE_ACCESS,
.list = posix_acl_xattr_list,
.get = posix_acl_xattr_get,
@@ -854,7 +839,7 @@ const struct xattr_handler posix_acl_access_xattr_handler = {
EXPORT_SYMBOL_GPL(posix_acl_access_xattr_handler);
const struct xattr_handler posix_acl_default_xattr_handler = {
- .prefix = POSIX_ACL_XATTR_DEFAULT,
+ .name = XATTR_NAME_POSIX_ACL_DEFAULT,
.flags = ACL_TYPE_DEFAULT,
.list = posix_acl_xattr_list,
.get = posix_acl_xattr_get,
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 66b26fdfff8d..e5ddb4e5ea94 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -756,7 +756,8 @@ find_xattr_handler_prefix(const struct xattr_handler **handlers,
return NULL;
for_each_xattr_handler(handlers, xah) {
- if (strncmp(xah->prefix, name, strlen(xah->prefix)) == 0)
+ const char *prefix = xattr_prefix(xah);
+ if (strncmp(prefix, name, strlen(prefix)) == 0)
break;
}
@@ -839,19 +840,16 @@ static int listxattr_filler(struct dir_context *ctx, const char *name,
handler = find_xattr_handler_prefix(b->dentry->d_sb->s_xattr,
name);
- if (!handler) /* Unsupported xattr name */
+ if (!handler /* Unsupported xattr name */ ||
+ (handler->list && !handler->list(b->dentry)))
return 0;
+ size = namelen + 1;
if (b->buf) {
- size = handler->list(handler, b->dentry,
- b->buf + b->pos, b->size, name,
- namelen);
if (size > b->size)
return -ERANGE;
- } else {
- size = handler->list(handler, b->dentry,
- NULL, 0, name, namelen);
+ memcpy(b->buf + b->pos, name, namelen);
+ b->buf[b->pos + namelen] = 0;
}
-
b->pos += size;
}
return 0;
diff --git a/fs/reiserfs/xattr_acl.c b/fs/reiserfs/xattr_acl.c
index 4b34b9dc03dd..558a16beaacb 100644
--- a/fs/reiserfs/xattr_acl.c
+++ b/fs/reiserfs/xattr_acl.c
@@ -186,10 +186,10 @@ struct posix_acl *reiserfs_get_acl(struct inode *inode, int type)
switch (type) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
+ name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
+ name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
BUG();
@@ -244,7 +244,7 @@ __reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
switch (type) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
+ name = XATTR_NAME_POSIX_ACL_ACCESS;
if (acl) {
error = posix_acl_equiv_mode(acl, &inode->i_mode);
if (error < 0)
@@ -256,7 +256,7 @@ __reiserfs_set_acl(struct reiserfs_transaction_handle *th, struct inode *inode,
}
break;
case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
+ name = XATTR_NAME_POSIX_ACL_DEFAULT;
if (!S_ISDIR(inode->i_mode))
return acl ? -EACCES : 0;
break;
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index ac659af431ae..ab0217d32039 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -34,21 +34,9 @@ security_set(const struct xattr_handler *handler, struct dentry *dentry,
return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
}
-static size_t security_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_len,
- const char *name, size_t namelen)
+static bool security_list(struct dentry *dentry)
{
- const size_t len = namelen + 1;
-
- if (IS_PRIVATE(d_inode(dentry)))
- return 0;
-
- if (list && len <= list_len) {
- memcpy(list, name, namelen);
- list[namelen] = '\0';
- }
-
- return len;
+ return !IS_PRIVATE(d_inode(dentry));
}
/* Initializes the security context for a new inode and returns the number
diff --git a/fs/reiserfs/xattr_trusted.c b/fs/reiserfs/xattr_trusted.c
index a338adf1b8b4..64b67aa643a9 100644
--- a/fs/reiserfs/xattr_trusted.c
+++ b/fs/reiserfs/xattr_trusted.c
@@ -33,20 +33,9 @@ trusted_set(const struct xattr_handler *handler, struct dentry *dentry,
return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
}
-static size_t trusted_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
+static bool trusted_list(struct dentry *dentry)
{
- const size_t len = name_len + 1;
-
- if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
- return 0;
-
- if (list && len <= list_size) {
- memcpy(list, name, name_len);
- list[name_len] = '\0';
- }
- return len;
+ return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry));
}
const struct xattr_handler reiserfs_xattr_trusted_handler = {
diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c
index 39c9667191c5..12e6306f562a 100644
--- a/fs/reiserfs/xattr_user.c
+++ b/fs/reiserfs/xattr_user.c
@@ -30,19 +30,9 @@ user_set(const struct xattr_handler *handler, struct dentry *dentry,
return reiserfs_xattr_set(d_inode(dentry), name, buffer, size, flags);
}
-static size_t user_list(const struct xattr_handler *handler,
- struct dentry *dentry, char *list, size_t list_size,
- const char *name, size_t name_len)
+static bool user_list(struct dentry *dentry)
{
- const size_t len = name_len + 1;
-
- if (!reiserfs_xattrs_user(dentry->d_sb))
- return 0;
- if (list && len <= list_size) {
- memcpy(list, name, name_len);
- list[name_len] = '\0';
- }
- return len;
+ return reiserfs_xattrs_user(dentry->d_sb);
}
const struct xattr_handler reiserfs_xattr_user_handler = {
diff --git a/fs/squashfs/xattr.c b/fs/squashfs/xattr.c
index 6a4cc344085c..1e9de96288d8 100644
--- a/fs/squashfs/xattr.c
+++ b/fs/squashfs/xattr.c
@@ -58,7 +58,7 @@ ssize_t squashfs_listxattr(struct dentry *d, char *buffer,
struct squashfs_xattr_entry entry;
struct squashfs_xattr_val val;
const struct xattr_handler *handler;
- int name_size, prefix_size = 0;
+ int name_size;
err = squashfs_read_metadata(sb, &entry, &start, &offset,
sizeof(entry));
@@ -67,15 +67,16 @@ ssize_t squashfs_listxattr(struct dentry *d, char *buffer,
name_size = le16_to_cpu(entry.size);
handler = squashfs_xattr_handler(le16_to_cpu(entry.type));
- if (handler)
- prefix_size = handler->list(handler, d, buffer, rest,
- NULL, name_size);
- if (prefix_size) {
+ if (handler && (!handler->list || handler->list(d))) {
+ const char *prefix = handler->prefix ?: handler->name;
+ size_t prefix_size = strlen(prefix);
+
if (buffer) {
if (prefix_size + name_size + 1 > rest) {
err = -ERANGE;
goto failed;
}
+ memcpy(buffer, prefix, prefix_size);
buffer += prefix_size;
}
err = squashfs_read_metadata(sb, buffer, &start,
@@ -212,25 +213,10 @@ failed:
}
-static size_t squashfs_xattr_handler_list(const struct xattr_handler *handler,
- struct dentry *d, char *list,
- size_t list_size, const char *name,
- size_t name_len)
-{
- int len = strlen(handler->prefix);
-
- if (list && len <= list_size)
- memcpy(list, handler->prefix, len);
- return len;
-}
-
static int squashfs_xattr_handler_get(const struct xattr_handler *handler,
struct dentry *d, const char *name,
void *buffer, size_t size)
{
- if (name[0] == '\0')
- return -EINVAL;
-
return squashfs_xattr_get(d_inode(d), handler->flags, name,
buffer, size);
}
@@ -241,22 +227,15 @@ static int squashfs_xattr_handler_get(const struct xattr_handler *handler,
static const struct xattr_handler squashfs_xattr_user_handler = {
.prefix = XATTR_USER_PREFIX,
.flags = SQUASHFS_XATTR_USER,
- .list = squashfs_xattr_handler_list,
.get = squashfs_xattr_handler_get
};
/*
* Trusted namespace support
*/
-static size_t squashfs_trusted_xattr_handler_list(const struct xattr_handler *handler,
- struct dentry *d, char *list,
- size_t list_size, const char *name,
- size_t name_len)
+static bool squashfs_trusted_xattr_handler_list(struct dentry *d)
{
- if (!capable(CAP_SYS_ADMIN))
- return 0;
- return squashfs_xattr_handler_list(handler, d, list, list_size, name,
- name_len);
+ return capable(CAP_SYS_ADMIN);
}
static const struct xattr_handler squashfs_xattr_trusted_handler = {
@@ -272,7 +251,6 @@ static const struct xattr_handler squashfs_xattr_trusted_handler = {
static const struct xattr_handler squashfs_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.flags = SQUASHFS_XATTR_SECURITY,
- .list = squashfs_xattr_handler_list,
.get = squashfs_xattr_handler_get
};
diff --git a/fs/xattr.c b/fs/xattr.c
index 9b932b95d74e..d7f5037a17b5 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -208,25 +208,6 @@ vfs_getxattr_alloc(struct dentry *dentry, const char *name, char **xattr_value,
return error;
}
-/* Compare an extended attribute value with the given value */
-int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name,
- const char *value, size_t size, gfp_t flags)
-{
- char *xattr_value = NULL;
- int rc;
-
- rc = vfs_getxattr_alloc(dentry, xattr_name, &xattr_value, 0, flags);
- if (rc < 0)
- return rc;
-
- if ((rc != size) || (memcmp(xattr_value, value, rc) != 0))
- rc = -EINVAL;
- else
- rc = 0;
- kfree(xattr_value);
- return rc;
-}
-
ssize_t
vfs_getxattr(struct dentry *dentry, const char *name, void *value, size_t size)
{
@@ -700,13 +681,20 @@ xattr_resolve_name(const struct xattr_handler **handlers, const char **name)
return NULL;
for_each_xattr_handler(handlers, handler) {
- const char *n = strcmp_prefix(*name, handler->prefix);
+ const char *n;
+
+ n = strcmp_prefix(*name, xattr_prefix(handler));
if (n) {
+ if (!handler->prefix ^ !*n) {
+ if (*n)
+ continue;
+ return ERR_PTR(-EINVAL);
+ }
*name = n;
- break;
+ return handler;
}
}
- return handler;
+ return ERR_PTR(-EOPNOTSUPP);
}
/*
@@ -718,8 +706,8 @@ generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t s
const struct xattr_handler *handler;
handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
- if (!handler)
- return -EOPNOTSUPP;
+ if (IS_ERR(handler))
+ return PTR_ERR(handler);
return handler->get(handler, dentry, name, buffer, size);
}
@@ -735,19 +723,25 @@ generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
if (!buffer) {
for_each_xattr_handler(handlers, handler) {
- size += handler->list(handler, dentry, NULL, 0,
- NULL, 0);
+ if (!handler->name ||
+ (handler->list && !handler->list(dentry)))
+ continue;
+ size += strlen(handler->name) + 1;
}
} else {
char *buf = buffer;
+ size_t len;
for_each_xattr_handler(handlers, handler) {
- size = handler->list(handler, dentry, buf, buffer_size,
- NULL, 0);
- if (size > buffer_size)
+ if (!handler->name ||
+ (handler->list && !handler->list(dentry)))
+ continue;
+ len = strlen(handler->name);
+ if (len + 1 > buffer_size)
return -ERANGE;
- buf += size;
- buffer_size -= size;
+ memcpy(buf, handler->name, len + 1);
+ buf += len + 1;
+ buffer_size -= len + 1;
}
size = buf - buffer;
}
@@ -765,8 +759,8 @@ generic_setxattr(struct dentry *dentry, const char *name, const void *value, siz
if (size == 0)
value = ""; /* empty EA, do not remove */
handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
- if (!handler)
- return -EOPNOTSUPP;
+ if (IS_ERR(handler))
+ return PTR_ERR(handler);
return handler->set(handler, dentry, name, value, size, flags);
}
@@ -780,8 +774,8 @@ generic_removexattr(struct dentry *dentry, const char *name)
const struct xattr_handler *handler;
handler = xattr_resolve_name(dentry->d_sb->s_xattr, &name);
- if (!handler)
- return -EOPNOTSUPP;
+ if (IS_ERR(handler))
+ return PTR_ERR(handler);
return handler->set(handler, dentry, name, NULL, 0, XATTR_REPLACE);
}
@@ -808,7 +802,7 @@ EXPORT_SYMBOL(generic_removexattr);
const char *xattr_full_name(const struct xattr_handler *handler,
const char *name)
{
- size_t prefix_len = strlen(handler->prefix);
+ size_t prefix_len = strlen(xattr_prefix(handler));
return name - prefix_len;
}
@@ -863,8 +857,22 @@ int simple_xattr_get(struct simple_xattrs *xattrs, const char *name,
return ret;
}
-static int __simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
- const void *value, size_t size, int flags)
+/**
+ * simple_xattr_set - xattr SET operation for in-memory/pseudo filesystems
+ * @xattrs: target simple_xattr list
+ * @name: name of the extended attribute
+ * @value: value of the xattr. If %NULL, will remove the attribute.
+ * @size: size of the new xattr
+ * @flags: %XATTR_{CREATE|REPLACE}
+ *
+ * %XATTR_CREATE is set, the xattr shouldn't exist already; otherwise fails
+ * with -EEXIST. If %XATTR_REPLACE is set, the xattr should exist;
+ * otherwise, fails with -ENODATA.
+ *
+ * Returns 0 on success, -errno on failure.
+ */
+int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
+ const void *value, size_t size, int flags)
{
struct simple_xattr *xattr;
struct simple_xattr *new_xattr = NULL;
@@ -914,73 +922,64 @@ out:
}
-/**
- * simple_xattr_set - xattr SET operation for in-memory/pseudo filesystems
- * @xattrs: target simple_xattr list
- * @name: name of the new extended attribute
- * @value: value of the new xattr. If %NULL, will remove the attribute
- * @size: size of the new xattr
- * @flags: %XATTR_{CREATE|REPLACE}
- *
- * %XATTR_CREATE is set, the xattr shouldn't exist already; otherwise fails
- * with -EEXIST. If %XATTR_REPLACE is set, the xattr should exist;
- * otherwise, fails with -ENODATA.
- *
- * Returns 0 on success, -errno on failure.
- */
-int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
- const void *value, size_t size, int flags)
-{
- if (size == 0)
- value = ""; /* empty EA, do not remove */
- return __simple_xattr_set(xattrs, name, value, size, flags);
-}
-
-/*
- * xattr REMOVE operation for in-memory/pseudo filesystems
- */
-int simple_xattr_remove(struct simple_xattrs *xattrs, const char *name)
+static bool xattr_is_trusted(const char *name)
{
- return __simple_xattr_set(xattrs, name, NULL, 0, XATTR_REPLACE);
+ return !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN);
}
-static bool xattr_is_trusted(const char *name)
+static int xattr_list_one(char **buffer, ssize_t *remaining_size,
+ const char *name)
{
- return !strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN);
+ 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;
}
/*
* xattr LIST operation for in-memory/pseudo filesystems
*/
-ssize_t simple_xattr_list(struct simple_xattrs *xattrs, char *buffer,
- size_t size)
+ssize_t simple_xattr_list(struct inode *inode, struct simple_xattrs *xattrs,
+ char *buffer, size_t size)
{
bool trusted = capable(CAP_SYS_ADMIN);
struct simple_xattr *xattr;
- size_t used = 0;
+ ssize_t remaining_size = size;
+ int err;
+
+#ifdef CONFIG_FS_POSIX_ACL
+ 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
spin_lock(&xattrs->lock);
list_for_each_entry(xattr, &xattrs->head, list) {
- size_t len;
-
/* skip "trusted." attributes for unprivileged callers */
if (!trusted && xattr_is_trusted(xattr->name))
continue;
- len = strlen(xattr->name) + 1;
- used += len;
- if (buffer) {
- if (size < used) {
- used = -ERANGE;
- break;
- }
- memcpy(buffer, xattr->name, len);
- buffer += len;
- }
+ err = xattr_list_one(&buffer, &remaining_size, xattr->name);
+ if (err)
+ return err;
}
spin_unlock(&xattrs->lock);
- return used;
+ return size - remaining_size;
}
/*
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index 6bb470fbb8e8..2d5df1f23bbc 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -252,29 +252,6 @@ xfs_set_mode(struct inode *inode, umode_t mode)
return error;
}
-static int
-xfs_acl_exists(struct inode *inode, unsigned char *name)
-{
- int len = XFS_ACL_MAX_SIZE(XFS_M(inode->i_sb));
-
- return (xfs_attr_get(XFS_I(inode), name, NULL, &len,
- ATTR_ROOT|ATTR_KERNOVAL) == 0);
-}
-
-int
-posix_acl_access_exists(struct inode *inode)
-{
- return xfs_acl_exists(inode, SGI_ACL_FILE);
-}
-
-int
-posix_acl_default_exists(struct inode *inode)
-{
- if (!S_ISDIR(inode->i_mode))
- return 0;
- return xfs_acl_exists(inode, SGI_ACL_DEFAULT);
-}
-
int
xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
diff --git a/fs/xfs/xfs_acl.h b/fs/xfs/xfs_acl.h
index 52f8255d6bdf..286fa89217f5 100644
--- a/fs/xfs/xfs_acl.h
+++ b/fs/xfs/xfs_acl.h
@@ -24,16 +24,12 @@ struct posix_acl;
#ifdef CONFIG_XFS_POSIX_ACL
extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
extern int xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
-extern int posix_acl_access_exists(struct inode *inode);
-extern int posix_acl_default_exists(struct inode *inode);
#else
static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type)
{
return NULL;
}
# define xfs_set_acl NULL
-# define posix_acl_access_exists(inode) 0
-# define posix_acl_default_exists(inode) 0
#endif /* CONFIG_XFS_POSIX_ACL */
extern void xfs_forget_acl(struct inode *inode, const char *name, int xflags);
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 839b35ca21c6..110f1d7d86b0 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -39,9 +39,6 @@ xfs_xattr_get(const struct xattr_handler *handler, struct dentry *dentry,
struct xfs_inode *ip = XFS_I(d_inode(dentry));
int error, asize = size;
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
/* Convert Linux syscall to XFS internal ATTR flags */
if (!size) {
xflags |= ATTR_KERNOVAL;
@@ -84,9 +81,6 @@ xfs_xattr_set(const struct xattr_handler *handler, struct dentry *dentry,
struct xfs_inode *ip = XFS_I(d_inode(dentry));
int error;
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
/* Convert Linux syscall to XFS internal ATTR flags */
if (flags & XATTR_CREATE)
xflags |= ATTR_CREATE;
@@ -135,47 +129,19 @@ const struct xattr_handler *xfs_xattr_handlers[] = {
NULL
};
-static unsigned int xfs_xattr_prefix_len(int flags)
-{
- if (flags & XFS_ATTR_SECURE)
- return sizeof("security");
- else if (flags & XFS_ATTR_ROOT)
- return sizeof("trusted");
- else
- return sizeof("user");
-}
-
-static const char *xfs_xattr_prefix(int flags)
-{
- if (flags & XFS_ATTR_SECURE)
- return xfs_xattr_security_handler.prefix;
- else if (flags & XFS_ATTR_ROOT)
- return xfs_xattr_trusted_handler.prefix;
- else
- return xfs_xattr_user_handler.prefix;
-}
-
static int
-xfs_xattr_put_listent(
+__xfs_xattr_put_listent(
struct xfs_attr_list_context *context,
- int flags,
- unsigned char *name,
- int namelen,
- int valuelen,
- unsigned char *value)
+ char *prefix,
+ int prefix_len,
+ unsigned char *name,
+ int namelen)
{
- unsigned int prefix_len = xfs_xattr_prefix_len(flags);
char *offset;
int arraytop;
- ASSERT(context->count >= 0);
-
- /*
- * Only show root namespace entries if we are actually allowed to
- * see them.
- */
- if ((flags & XFS_ATTR_ROOT) && !capable(CAP_SYS_ADMIN))
- return 0;
+ if (!context->alist)
+ goto compute_size;
arraytop = context->count + prefix_len + namelen + 1;
if (arraytop > context->firstu) {
@@ -183,17 +149,19 @@ xfs_xattr_put_listent(
return 1;
}
offset = (char *)context->alist + context->count;
- strncpy(offset, xfs_xattr_prefix(flags), prefix_len);
+ strncpy(offset, prefix, prefix_len);
offset += prefix_len;
strncpy(offset, (char *)name, namelen); /* real name */
offset += namelen;
*offset = '\0';
+
+compute_size:
context->count += prefix_len + namelen + 1;
return 0;
}
static int
-xfs_xattr_put_listent_sizes(
+xfs_xattr_put_listent(
struct xfs_attr_list_context *context,
int flags,
unsigned char *name,
@@ -201,24 +169,55 @@ xfs_xattr_put_listent_sizes(
int valuelen,
unsigned char *value)
{
- context->count += xfs_xattr_prefix_len(flags) + namelen + 1;
- return 0;
-}
+ char *prefix;
+ int prefix_len;
-static int
-list_one_attr(const char *name, const size_t len, void *data,
- size_t size, ssize_t *result)
-{
- char *p = data + *result;
+ ASSERT(context->count >= 0);
- *result += len;
- if (!size)
- return 0;
- if (*result > size)
- return -ERANGE;
+ if (flags & XFS_ATTR_ROOT) {
+#ifdef CONFIG_XFS_POSIX_ACL
+ if (namelen == SGI_ACL_FILE_SIZE &&
+ strncmp(name, SGI_ACL_FILE,
+ SGI_ACL_FILE_SIZE) == 0) {
+ int ret = __xfs_xattr_put_listent(
+ context, XATTR_SYSTEM_PREFIX,
+ XATTR_SYSTEM_PREFIX_LEN,
+ XATTR_POSIX_ACL_ACCESS,
+ strlen(XATTR_POSIX_ACL_ACCESS));
+ if (ret)
+ return ret;
+ } else if (namelen == SGI_ACL_DEFAULT_SIZE &&
+ strncmp(name, SGI_ACL_DEFAULT,
+ SGI_ACL_DEFAULT_SIZE) == 0) {
+ int ret = __xfs_xattr_put_listent(
+ context, XATTR_SYSTEM_PREFIX,
+ XATTR_SYSTEM_PREFIX_LEN,
+ XATTR_POSIX_ACL_DEFAULT,
+ strlen(XATTR_POSIX_ACL_DEFAULT));
+ if (ret)
+ return ret;
+ }
+#endif
- strcpy(p, name);
- return 0;
+ /*
+ * Only show root namespace entries if we are actually allowed to
+ * see them.
+ */
+ if (!capable(CAP_SYS_ADMIN))
+ return 0;
+
+ prefix = XATTR_TRUSTED_PREFIX;
+ prefix_len = XATTR_TRUSTED_PREFIX_LEN;
+ } else if (flags & XFS_ATTR_SECURE) {
+ prefix = XATTR_SECURITY_PREFIX;
+ prefix_len = XATTR_SECURITY_PREFIX_LEN;
+ } else {
+ prefix = XATTR_USER_PREFIX;
+ prefix_len = XATTR_USER_PREFIX_LEN;
+ }
+
+ return __xfs_xattr_put_listent(context, prefix, prefix_len, name,
+ namelen);
}
ssize_t
@@ -227,7 +226,6 @@ xfs_vn_listxattr(struct dentry *dentry, char *data, size_t size)
struct xfs_attr_list_context context;
struct attrlist_cursor_kern cursor = { 0 };
struct inode *inode = d_inode(dentry);
- int error;
/*
* First read the regular on-disk attributes.
@@ -236,37 +234,14 @@ xfs_vn_listxattr(struct dentry *dentry, char *data, size_t size)
context.dp = XFS_I(inode);
context.cursor = &cursor;
context.resynch = 1;
- context.alist = data;
+ context.alist = size ? data : NULL;
context.bufsize = size;
context.firstu = context.bufsize;
-
- if (size)
- context.put_listent = xfs_xattr_put_listent;
- else
- context.put_listent = xfs_xattr_put_listent_sizes;
+ context.put_listent = xfs_xattr_put_listent;
xfs_attr_list_int(&context);
if (context.count < 0)
return -ERANGE;
- /*
- * Then add the two synthetic ACL attributes.
- */
- if (posix_acl_access_exists(inode)) {
- error = list_one_attr(POSIX_ACL_XATTR_ACCESS,
- strlen(POSIX_ACL_XATTR_ACCESS) + 1,
- data, size, &context.count);
- if (error)
- return error;
- }
-
- if (posix_acl_default_exists(inode)) {
- error = list_one_attr(POSIX_ACL_XATTR_DEFAULT,
- strlen(POSIX_ACL_XATTR_DEFAULT) + 1,
- data, size, &context.count);
- if (error)
- return error;
- }
-
return context.count;
}
diff --git a/include/linux/posix_acl_xattr.h b/include/linux/posix_acl_xattr.h
index 6f14ee295822..e5e8ec40278d 100644
--- a/include/linux/posix_acl_xattr.h
+++ b/include/linux/posix_acl_xattr.h
@@ -9,16 +9,12 @@
#ifndef _POSIX_ACL_XATTR_H
#define _POSIX_ACL_XATTR_H
+#include <uapi/linux/xattr.h>
#include <linux/posix_acl.h>
-/* Extended attribute names */
-#define POSIX_ACL_XATTR_ACCESS "system.posix_acl_access"
-#define POSIX_ACL_XATTR_DEFAULT "system.posix_acl_default"
-
/* Supported ACL a_version fields */
#define POSIX_ACL_XATTR_VERSION 0x0002
-
/* An undefined entry e_id value */
#define ACL_UNDEFINED_ID (-1)
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index 89474b9d260c..4457541de3c9 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -19,12 +19,16 @@
struct inode;
struct dentry;
+/*
+ * struct xattr_handler: When @name is set, match attributes with exactly that
+ * name. When @prefix is set instead, match attributes with that prefix and
+ * with a non-empty suffix.
+ */
struct xattr_handler {
+ const char *name;
const char *prefix;
int flags; /* fs private flags */
- size_t (*list)(const struct xattr_handler *, struct dentry *dentry,
- char *list, size_t list_size, const char *name,
- size_t name_len);
+ bool (*list)(struct dentry *dentry);
int (*get)(const struct xattr_handler *, struct dentry *dentry,
const char *name, void *buffer, size_t size);
int (*set)(const struct xattr_handler *, struct dentry *dentry,
@@ -53,8 +57,11 @@ int generic_setxattr(struct dentry *dentry, const char *name, const void *value,
int generic_removexattr(struct dentry *dentry, const char *name);
ssize_t vfs_getxattr_alloc(struct dentry *dentry, const char *name,
char **xattr_value, size_t size, gfp_t flags);
-int vfs_xattr_cmp(struct dentry *dentry, const char *xattr_name,
- const char *value, size_t size, gfp_t flags);
+
+static inline const char *xattr_prefix(const struct xattr_handler *handler)
+{
+ return handler->prefix ?: handler->name;
+}
struct simple_xattrs {
struct list_head head;
@@ -95,8 +102,7 @@ int simple_xattr_get(struct simple_xattrs *xattrs, const char *name,
void *buffer, size_t size);
int simple_xattr_set(struct simple_xattrs *xattrs, const char *name,
const void *value, size_t size, int flags);
-int simple_xattr_remove(struct simple_xattrs *xattrs, const char *name);
-ssize_t simple_xattr_list(struct simple_xattrs *xattrs, char *buffer,
+ssize_t simple_xattr_list(struct inode *inode, struct simple_xattrs *xattrs, char *buffer,
size_t size);
void simple_xattr_list_add(struct simple_xattrs *xattrs,
struct simple_xattr *new_xattr);
diff --git a/mm/shmem.c b/mm/shmem.c
index d00c92fad48f..5813b7fa85b6 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -2564,99 +2564,52 @@ static int shmem_initxattrs(struct inode *inode,
return 0;
}
-static const struct xattr_handler *shmem_xattr_handlers[] = {
-#ifdef CONFIG_TMPFS_POSIX_ACL
- &posix_acl_access_xattr_handler,
- &posix_acl_default_xattr_handler,
-#endif
- NULL
-};
-
-static int shmem_xattr_validate(const char *name)
-{
- struct { const char *prefix; size_t len; } arr[] = {
- { XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN },
- { XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN }
- };
- int i;
-
- for (i = 0; i < ARRAY_SIZE(arr); i++) {
- size_t preflen = arr[i].len;
- if (strncmp(name, arr[i].prefix, preflen) == 0) {
- if (!name[preflen])
- return -EINVAL;
- return 0;
- }
- }
- return -EOPNOTSUPP;
-}
-
-static ssize_t shmem_getxattr(struct dentry *dentry, const char *name,
- void *buffer, size_t size)
+static int shmem_xattr_handler_get(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ void *buffer, size_t size)
{
struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
- int err;
-
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_getxattr(dentry, name, buffer, size);
-
- err = shmem_xattr_validate(name);
- if (err)
- return err;
+ name = xattr_full_name(handler, name);
return simple_xattr_get(&info->xattrs, name, buffer, size);
}
-static int shmem_setxattr(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags)
+static int shmem_xattr_handler_set(const struct xattr_handler *handler,
+ struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags)
{
struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
- int err;
-
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_setxattr(dentry, name, value, size, flags);
-
- err = shmem_xattr_validate(name);
- if (err)
- return err;
+ name = xattr_full_name(handler, name);
return simple_xattr_set(&info->xattrs, name, value, size, flags);
}
-static int shmem_removexattr(struct dentry *dentry, const char *name)
-{
- struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
- int err;
-
- /*
- * If this is a request for a synthetic attribute in the system.*
- * namespace use the generic infrastructure to resolve a handler
- * for it via sb->s_xattr.
- */
- if (!strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN))
- return generic_removexattr(dentry, name);
+static const struct xattr_handler shmem_security_xattr_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = shmem_xattr_handler_get,
+ .set = shmem_xattr_handler_set,
+};
- err = shmem_xattr_validate(name);
- if (err)
- return err;
+static const struct xattr_handler shmem_trusted_xattr_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .get = shmem_xattr_handler_get,
+ .set = shmem_xattr_handler_set,
+};
- return simple_xattr_remove(&info->xattrs, name);
-}
+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
+};
static ssize_t shmem_listxattr(struct dentry *dentry, char *buffer, size_t size)
{
struct shmem_inode_info *info = SHMEM_I(d_inode(dentry));
- return simple_xattr_list(&info->xattrs, buffer, size);
+ return simple_xattr_list(d_inode(dentry), &info->xattrs, buffer, size);
}
#endif /* CONFIG_TMPFS_XATTR */
@@ -2664,10 +2617,10 @@ static const struct inode_operations shmem_short_symlink_operations = {
.readlink = generic_readlink,
.get_link = simple_get_link,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
#endif
};
@@ -2675,10 +2628,10 @@ static const struct inode_operations shmem_symlink_inode_operations = {
.readlink = generic_readlink,
.get_link = shmem_get_link,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
#endif
};
@@ -3150,10 +3103,10 @@ static const struct inode_operations shmem_inode_operations = {
.getattr = shmem_getattr,
.setattr = shmem_setattr,
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
.set_acl = simple_set_acl,
#endif
};
@@ -3172,10 +3125,10 @@ static const struct inode_operations shmem_dir_inode_operations = {
.tmpfile = shmem_tmpfile,
#endif
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_setattr,
@@ -3185,10 +3138,10 @@ static const struct inode_operations shmem_dir_inode_operations = {
static const struct inode_operations shmem_special_inode_operations = {
#ifdef CONFIG_TMPFS_XATTR
- .setxattr = shmem_setxattr,
- .getxattr = shmem_getxattr,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
.listxattr = shmem_listxattr,
- .removexattr = shmem_removexattr,
+ .removexattr = generic_removexattr,
#endif
#ifdef CONFIG_TMPFS_POSIX_ACL
.setattr = shmem_setattr,
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index ff81026f6ddb..37fdd5416a64 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1519,8 +1519,6 @@ static int smack_inode_getsecurity(const struct inode *inode,
* @inode: the object
* @buffer: where they go
* @buffer_size: size of buffer
- *
- * Returns 0 on success, -EINVAL otherwise
*/
static int smack_inode_listsecurity(struct inode *inode, char *buffer,
size_t buffer_size)