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authorChristoph Hellwig <hch@infradead.org>2014-01-29 23:59:19 -0800
committerAl Viro <viro@zeniv.linux.org.uk>2014-01-31 14:44:39 -0500
commitb168fff72109a3627686578e31e745f778832f98 (patch)
treec8ab8ef8d5e0e0c47bba1f348713cd6486e63ab5
parente5fbf67dab3341133d4ee3b1c8ce780e087733ba (diff)
downloadlinux-linaro-stable-b168fff72109a3627686578e31e745f778832f98.tar.gz
hfsplus: use xattr handlers for removexattr
hfsplus was already using the handlers for get and set operations, and with the removal of can_set_xattr we've now allow operations that wouldn't otherwise be allowed. With this we can also centralize the special-casing of the osx. attrs that don't have prefixes on disk in the osx xattr handlers. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--fs/hfsplus/dir.c2
-rw-r--r--fs/hfsplus/inode.c2
-rw-r--r--fs/hfsplus/xattr.c60
-rw-r--r--fs/hfsplus/xattr.h2
4 files changed, 19 insertions, 47 deletions
diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index 9ee62985e739..bdec66522de3 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -529,7 +529,7 @@ const struct inode_operations hfsplus_dir_inode_operations = {
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = hfsplus_listxattr,
- .removexattr = hfsplus_removexattr,
+ .removexattr = generic_removexattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl,
.set_acl = hfsplus_set_posix_acl,
diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
index 4551cbd6bd43..fa929f325f87 100644
--- a/fs/hfsplus/inode.c
+++ b/fs/hfsplus/inode.c
@@ -331,7 +331,7 @@ static const struct inode_operations hfsplus_file_inode_operations = {
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = hfsplus_listxattr,
- .removexattr = hfsplus_removexattr,
+ .removexattr = generic_removexattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl,
.set_acl = hfsplus_set_posix_acl,
diff --git a/fs/hfsplus/xattr.c b/fs/hfsplus/xattr.c
index 0b4a5c9b93c4..4e27edc082a4 100644
--- a/fs/hfsplus/xattr.c
+++ b/fs/hfsplus/xattr.c
@@ -11,6 +11,8 @@
#include "xattr.h"
#include "acl.h"
+static int hfsplus_removexattr(struct inode *inode, const char *name);
+
const struct xattr_handler *hfsplus_xattr_handlers[] = {
&hfsplus_xattr_osx_handler,
&hfsplus_xattr_user_handler,
@@ -274,14 +276,8 @@ int __hfsplus_setxattr(struct inode *inode, const char *name,
HFSPLUS_IS_RSRC(inode))
return -EOPNOTSUPP;
- if (strncmp(name, XATTR_MAC_OSX_PREFIX,
- XATTR_MAC_OSX_PREFIX_LEN) == 0)
- name += XATTR_MAC_OSX_PREFIX_LEN;
-
- if (value == NULL) {
- value = "";
- size = 0;
- }
+ if (value == NULL)
+ return hfsplus_removexattr(inode, name);
err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
if (err) {
@@ -399,16 +395,11 @@ end_setxattr:
return err;
}
-static inline int is_osx_xattr(const char *xattr_name)
-{
- return !is_known_namespace(xattr_name);
-}
-
static int name_len(const char *xattr_name, int xattr_name_len)
{
int len = xattr_name_len + 1;
- if (is_osx_xattr(xattr_name))
+ if (!is_known_namespace(xattr_name))
len += XATTR_MAC_OSX_PREFIX_LEN;
return len;
@@ -419,7 +410,7 @@ static int copy_name(char *buffer, const char *xattr_name, int name_len)
int len = name_len;
int offset = 0;
- if (is_osx_xattr(xattr_name)) {
+ if (!is_known_namespace(xattr_name)) {
strncpy(buffer, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN);
offset += XATTR_MAC_OSX_PREFIX_LEN;
len += XATTR_MAC_OSX_PREFIX_LEN;
@@ -497,18 +488,6 @@ ssize_t __hfsplus_getxattr(struct inode *inode, const char *name,
HFSPLUS_IS_RSRC(inode))
return -EOPNOTSUPP;
- if (strncmp(name, XATTR_MAC_OSX_PREFIX,
- XATTR_MAC_OSX_PREFIX_LEN) == 0) {
- /* skip "osx." prefix */
- name += XATTR_MAC_OSX_PREFIX_LEN;
- /*
- * Don't allow retrieving properly prefixed attributes
- * by prepending them with "osx."
- */
- if (is_known_namespace(name))
- return -EOPNOTSUPP;
- }
-
if (!strcmp_xattr_finder_info(name))
return hfsplus_getxattr_finder_info(inode, value, size);
@@ -743,28 +722,18 @@ end_listxattr:
return res;
}
-int hfsplus_removexattr(struct dentry *dentry, const char *name)
+static int hfsplus_removexattr(struct inode *inode, const char *name)
{
int err = 0;
- struct inode *inode = dentry->d_inode;
struct hfs_find_data cat_fd;
u16 flags;
u16 cat_entry_type;
int is_xattr_acl_deleted = 0;
int is_all_xattrs_deleted = 0;
- if ((!S_ISREG(inode->i_mode) &&
- !S_ISDIR(inode->i_mode)) ||
- HFSPLUS_IS_RSRC(inode))
- return -EOPNOTSUPP;
-
if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
return -EOPNOTSUPP;
- if (strncmp(name, XATTR_MAC_OSX_PREFIX,
- XATTR_MAC_OSX_PREFIX_LEN) == 0)
- name += XATTR_MAC_OSX_PREFIX_LEN;
-
if (!strcmp_xattr_finder_info(name))
return -EOPNOTSUPP;
@@ -838,8 +807,12 @@ static int hfsplus_osx_getxattr(struct dentry *dentry, const char *name,
if (len > HFSPLUS_ATTR_MAX_STRLEN)
return -EOPNOTSUPP;
- strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
- strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
+ /*
+ * Don't allow retrieving properly prefixed attributes
+ * by prepending them with "osx."
+ */
+ if (is_known_namespace(name))
+ return -EOPNOTSUPP;
return hfsplus_getxattr(dentry, xattr_name, buffer, size);
}
@@ -857,12 +830,13 @@ static int hfsplus_osx_setxattr(struct dentry *dentry, const char *name,
if (len > HFSPLUS_ATTR_MAX_STRLEN)
return -EOPNOTSUPP;
+ /*
+ * Don't allow setting properly prefixed attributes
+ * by prepending them with "osx."
+ */
if (is_known_namespace(name))
return -EOPNOTSUPP;
- strcpy(xattr_name, XATTR_MAC_OSX_PREFIX);
- strcpy(xattr_name + XATTR_MAC_OSX_PREFIX_LEN, name);
-
return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
}
diff --git a/fs/hfsplus/xattr.h b/fs/hfsplus/xattr.h
index 9e214490c313..288530cf80b5 100644
--- a/fs/hfsplus/xattr.h
+++ b/fs/hfsplus/xattr.h
@@ -40,8 +40,6 @@ static inline ssize_t hfsplus_getxattr(struct dentry *dentry,
ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
-int hfsplus_removexattr(struct dentry *dentry, const char *name);
-
int hfsplus_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr);