1 files changed, 99 insertions, 0 deletions
diff --git a/fs/reiserfs/xattr_user.c b/fs/reiserfs/xattr_user.c
new file mode 100644
index 0000000..0772806
--- /dev/null
+++ b/fs/reiserfs/xattr_user.c
@@ -0,0 +1,99 @@
+#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>
+
+#ifdef CONFIG_REISERFS_FS_POSIX_ACL
+# include <linux/reiserfs_acl.h>
+#endif
+
+#define XATTR_USER_PREFIX "user."
+
+static int
+user_get (struct inode *inode, const char *name, void *buffer, size_t size)
+{
+
+    int error;
+
+    if (strlen(name) < sizeof(XATTR_USER_PREFIX))
+        return -EINVAL;
+
+    if (!reiserfs_xattrs_user (inode->i_sb))
+        return -EOPNOTSUPP;
+
+    error = reiserfs_permission_locked (inode, MAY_READ, NULL);
+    if (error)
+        return error;
+
+    return reiserfs_xattr_get (inode, name, buffer, size);
+}
+
+static int
+user_set (struct inode *inode, const char *name, const void *buffer,
+          size_t size, int flags)
+{
+
+    int error;
+
+    if (strlen(name) < sizeof(XATTR_USER_PREFIX))
+        return -EINVAL;
+
+    if (!reiserfs_xattrs_user (inode->i_sb))
+        return -EOPNOTSUPP;
+
+    if (!S_ISREG (inode->i_mode) &&
+        (!S_ISDIR (inode->i_mode) || inode->i_mode & S_ISVTX))
+        return -EPERM;
+
+    error = reiserfs_permission_locked (inode, MAY_WRITE, NULL);
+    if (error)
+        return error;
+
+    return reiserfs_xattr_set (inode, name, buffer, size, flags);
+}
+
+static int
+user_del (struct inode *inode, const char *name)
+{
+    int error;
+
+    if (strlen(name) < sizeof(XATTR_USER_PREFIX))
+        return -EINVAL;
+
+    if (!reiserfs_xattrs_user (inode->i_sb))
+        return -EOPNOTSUPP;
+
+    if (!S_ISREG (inode->i_mode) &&
+        (!S_ISDIR (inode->i_mode) || inode->i_mode & S_ISVTX))
+        return -EPERM;
+
+    error = reiserfs_permission_locked (inode, MAY_WRITE, NULL);
+    if (error)
+        return error;
+
+    return 0;
+}
+
+static int
+user_list (struct inode *inode, const char *name, int namelen, char *out)
+{
+    int len = namelen;
+    if (!reiserfs_xattrs_user (inode->i_sb))
+        return 0;
+
+    if (out)
+        memcpy (out, name, len);
+
+    return len;
+}
+
+struct reiserfs_xattr_handler user_handler = {
+	.prefix = XATTR_USER_PREFIX,
+	.get = user_get,
+	.set = user_set,
+	.del = user_del,
+	.list = user_list,
+};