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>
This commit is contained in:
Christoph Hellwig 2014-01-29 23:59:19 -08:00 committed by Al Viro
parent e5fbf67dab
commit b168fff721
4 changed files with 19 additions and 47 deletions

View File

@ -529,7 +529,7 @@ const struct inode_operations hfsplus_dir_inode_operations = {
.setxattr = generic_setxattr, .setxattr = generic_setxattr,
.getxattr = generic_getxattr, .getxattr = generic_getxattr,
.listxattr = hfsplus_listxattr, .listxattr = hfsplus_listxattr,
.removexattr = hfsplus_removexattr, .removexattr = generic_removexattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl, .get_acl = hfsplus_get_posix_acl,
.set_acl = hfsplus_set_posix_acl, .set_acl = hfsplus_set_posix_acl,

View File

@ -331,7 +331,7 @@ static const struct inode_operations hfsplus_file_inode_operations = {
.setxattr = generic_setxattr, .setxattr = generic_setxattr,
.getxattr = generic_getxattr, .getxattr = generic_getxattr,
.listxattr = hfsplus_listxattr, .listxattr = hfsplus_listxattr,
.removexattr = hfsplus_removexattr, .removexattr = generic_removexattr,
#ifdef CONFIG_HFSPLUS_FS_POSIX_ACL #ifdef CONFIG_HFSPLUS_FS_POSIX_ACL
.get_acl = hfsplus_get_posix_acl, .get_acl = hfsplus_get_posix_acl,
.set_acl = hfsplus_set_posix_acl, .set_acl = hfsplus_set_posix_acl,

View File

@ -11,6 +11,8 @@
#include "xattr.h" #include "xattr.h"
#include "acl.h" #include "acl.h"
static int hfsplus_removexattr(struct inode *inode, const char *name);
const struct xattr_handler *hfsplus_xattr_handlers[] = { const struct xattr_handler *hfsplus_xattr_handlers[] = {
&hfsplus_xattr_osx_handler, &hfsplus_xattr_osx_handler,
&hfsplus_xattr_user_handler, &hfsplus_xattr_user_handler,
@ -274,14 +276,8 @@ int __hfsplus_setxattr(struct inode *inode, const char *name,
HFSPLUS_IS_RSRC(inode)) HFSPLUS_IS_RSRC(inode))
return -EOPNOTSUPP; return -EOPNOTSUPP;
if (strncmp(name, XATTR_MAC_OSX_PREFIX, if (value == NULL)
XATTR_MAC_OSX_PREFIX_LEN) == 0) return hfsplus_removexattr(inode, name);
name += XATTR_MAC_OSX_PREFIX_LEN;
if (value == NULL) {
value = "";
size = 0;
}
err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd); err = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &cat_fd);
if (err) { if (err) {
@ -399,16 +395,11 @@ end_setxattr:
return err; 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) static int name_len(const char *xattr_name, int xattr_name_len)
{ {
int len = xattr_name_len + 1; int len = xattr_name_len + 1;
if (is_osx_xattr(xattr_name)) if (!is_known_namespace(xattr_name))
len += XATTR_MAC_OSX_PREFIX_LEN; len += XATTR_MAC_OSX_PREFIX_LEN;
return 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 len = name_len;
int offset = 0; 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); strncpy(buffer, XATTR_MAC_OSX_PREFIX, XATTR_MAC_OSX_PREFIX_LEN);
offset += XATTR_MAC_OSX_PREFIX_LEN; offset += XATTR_MAC_OSX_PREFIX_LEN;
len += 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)) HFSPLUS_IS_RSRC(inode))
return -EOPNOTSUPP; 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)) if (!strcmp_xattr_finder_info(name))
return hfsplus_getxattr_finder_info(inode, value, size); return hfsplus_getxattr_finder_info(inode, value, size);
@ -743,28 +722,18 @@ end_listxattr:
return res; return res;
} }
int hfsplus_removexattr(struct dentry *dentry, const char *name) static int hfsplus_removexattr(struct inode *inode, const char *name)
{ {
int err = 0; int err = 0;
struct inode *inode = dentry->d_inode;
struct hfs_find_data cat_fd; struct hfs_find_data cat_fd;
u16 flags; u16 flags;
u16 cat_entry_type; u16 cat_entry_type;
int is_xattr_acl_deleted = 0; int is_xattr_acl_deleted = 0;
int is_all_xattrs_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) if (!HFSPLUS_SB(inode->i_sb)->attr_tree)
return -EOPNOTSUPP; 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)) if (!strcmp_xattr_finder_info(name))
return -EOPNOTSUPP; return -EOPNOTSUPP;
@ -838,8 +807,12 @@ static int hfsplus_osx_getxattr(struct dentry *dentry, const char *name,
if (len > HFSPLUS_ATTR_MAX_STRLEN) if (len > HFSPLUS_ATTR_MAX_STRLEN)
return -EOPNOTSUPP; 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); 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) if (len > HFSPLUS_ATTR_MAX_STRLEN)
return -EOPNOTSUPP; return -EOPNOTSUPP;
/*
* Don't allow setting properly prefixed attributes
* by prepending them with "osx."
*/
if (is_known_namespace(name)) if (is_known_namespace(name))
return -EOPNOTSUPP; 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); return hfsplus_setxattr(dentry, xattr_name, buffer, size, flags);
} }

View File

@ -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); 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, int hfsplus_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr); const struct qstr *qstr);