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path: root/fs/reiserfs/xattr_security.c
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Diffstat (limited to 'fs/reiserfs/xattr_security.c')
-rw-r--r--fs/reiserfs/xattr_security.c80
1 files changed, 62 insertions, 18 deletions
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
index 056008db137..4d3c20e787c 100644
--- a/fs/reiserfs/xattr_security.c
+++ b/fs/reiserfs/xattr_security.c
@@ -4,6 +4,7 @@
#include <linux/pagemap.h>
#include <linux/xattr.h>
#include <linux/reiserfs_xattr.h>
+#include <linux/security.h>
#include <asm/uaccess.h>
static int
@@ -12,7 +13,7 @@ security_get(struct inode *inode, const char *name, void *buffer, size_t size)
if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
return -EINVAL;
- if (is_reiserfs_priv_object(inode))
+ if (IS_PRIVATE(inode))
return -EPERM;
return reiserfs_xattr_get(inode, name, buffer, size);
@@ -25,41 +26,84 @@ security_set(struct inode *inode, const char *name, const void *buffer,
if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
return -EINVAL;
- if (is_reiserfs_priv_object(inode))
+ if (IS_PRIVATE(inode))
return -EPERM;
return reiserfs_xattr_set(inode, name, buffer, size, flags);
}
-static int security_del(struct inode *inode, const char *name)
+static size_t security_list(struct inode *inode, char *list, size_t list_len,
+ const char *name, size_t namelen)
{
- if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
- return -EINVAL;
+ const size_t len = namelen + 1;
- if (is_reiserfs_priv_object(inode))
- return -EPERM;
+ if (IS_PRIVATE(inode))
+ return 0;
+
+ if (list && len <= list_len) {
+ memcpy(list, name, namelen);
+ list[namelen] = '\0';
+ }
- return 0;
+ return len;
}
-static int
-security_list(struct inode *inode, const char *name, int namelen, char *out)
+/* Initializes the security context for a new inode and returns the number
+ * of blocks needed for the transaction. If successful, reiserfs_security
+ * must be released using reiserfs_security_free when the caller is done. */
+int reiserfs_security_init(struct inode *dir, struct inode *inode,
+ struct reiserfs_security_handle *sec)
{
- int len = namelen;
+ int blocks = 0;
+ int error = security_inode_init_security(inode, dir, &sec->name,
+ &sec->value, &sec->length);
+ if (error) {
+ if (error == -EOPNOTSUPP)
+ error = 0;
- if (is_reiserfs_priv_object(inode))
- return 0;
+ sec->name = NULL;
+ sec->value = NULL;
+ sec->length = 0;
+ return error;
+ }
- if (out)
- memcpy(out, name, len);
+ if (sec->length) {
+ blocks = reiserfs_xattr_jcreate_nblocks(inode) +
+ reiserfs_xattr_nblocks(inode, sec->length);
+ /* We don't want to count the directories twice if we have
+ * a default ACL. */
+ REISERFS_I(inode)->i_flags |= i_has_xattr_dir;
+ }
+ return blocks;
+}
- return len;
+int reiserfs_security_write(struct reiserfs_transaction_handle *th,
+ struct inode *inode,
+ struct reiserfs_security_handle *sec)
+{
+ int error;
+ if (strlen(sec->name) < sizeof(XATTR_SECURITY_PREFIX))
+ return -EINVAL;
+
+ error = reiserfs_xattr_set_handle(th, inode, sec->name, sec->value,
+ sec->length, XATTR_CREATE);
+ if (error == -ENODATA || error == -EOPNOTSUPP)
+ error = 0;
+
+ return error;
+}
+
+void reiserfs_security_free(struct reiserfs_security_handle *sec)
+{
+ kfree(sec->name);
+ kfree(sec->value);
+ sec->name = NULL;
+ sec->value = NULL;
}
-struct reiserfs_xattr_handler security_handler = {
+struct xattr_handler reiserfs_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.get = security_get,
.set = security_set,
- .del = security_del,
.list = security_list,
};