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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.c69
1 files changed, 69 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c
new file mode 100644
index 00000000000..e044d511711
--- /dev/null
+++ b/fs/reiserfs/xattr_security.c
@@ -0,0 +1,69 @@
+#include <linux/reiserfs_fs.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/xattr.h>
+#include <linux/reiserfs_xattr.h>
+#include <asm/uaccess.h>
+
+#define XATTR_SECURITY_PREFIX "security."
+
+static int
+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))
+ return -EPERM;
+
+ return reiserfs_xattr_get (inode, name, buffer, size);
+}
+
+static int
+security_set (struct inode *inode, const char *name, const void *buffer,
+ size_t size, int flags)
+{
+ if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
+ return -EINVAL;
+
+ if (is_reiserfs_priv_object(inode))
+ return -EPERM;
+
+ return reiserfs_xattr_set (inode, name, buffer, size, flags);
+}
+
+static int
+security_del (struct inode *inode, const char *name)
+{
+ if (strlen(name) < sizeof(XATTR_SECURITY_PREFIX))
+ return -EINVAL;
+
+ if (is_reiserfs_priv_object(inode))
+ return -EPERM;
+
+ return 0;
+}
+
+static int
+security_list (struct inode *inode, const char *name, int namelen, char *out)
+{
+ int len = namelen;
+
+ if (is_reiserfs_priv_object(inode))
+ return 0;
+
+ if (out)
+ memcpy (out, name, len);
+
+ return len;
+}
+
+
+struct reiserfs_xattr_handler security_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = security_get,
+ .set = security_set,
+ .del = security_del,
+ .list = security_list,
+};