Check for immutable flag in fallocate path

Commit Message

Marco Feb. 21, 2011, 8:26 a.m. UTC

None

Patch

--- linux-2.6.38-rc5-orig/fs/ext4/extents.c	2011-02-16 04:23:45.000000000 +0100
+++ linux-2.6.38-rc5/fs/ext4/extents.c	2011-02-21 08:43:37.000000000 +0100
@@ -3670,6 +3670,12 @@  long ext4_fallocate(struct file *file, i
 	 */
 	credits = ext4_chunk_trans_blocks(inode, max_blocks);
 	mutex_lock(&inode->i_mutex);
+
+	if (IS_IMMUTABLE(inode)) {
+		mutex_unlock(&inode->i_mutex);
+		return -EPERM;
+	}
+
 	ret = inode_newsize_ok(inode, (len + offset));
 	if (ret) {
 		mutex_unlock(&inode->i_mutex);
--- linux-2.6.38-rc5-orig/fs/btrfs/file.c	2011-02-16 04:23:45.000000000 +0100
+++ linux-2.6.38-rc5/fs/btrfs/file.c	2011-02-21 08:55:58.000000000 +0100
@@ -1289,6 +1289,12 @@  static long btrfs_fallocate(struct file
 	btrfs_wait_ordered_range(inode, alloc_start, alloc_end - alloc_start);
 
 	mutex_lock(&inode->i_mutex);
+
+	if (IS_IMMUTABLE(inode)) {
+		ret = -EPERM;
+		goto out;
+	}
+
 	ret = inode_newsize_ok(inode, alloc_end);
 	if (ret)
 		goto out;
--- linux-2.6.38-rc5-orig/fs/xfs/linux-2.6/xfs_file.c	2011-02-16 04:23:45.000000000 +0100
+++ linux-2.6.38-rc5/fs/xfs/linux-2.6/xfs_file.c	2011-02-21 09:07:46.000000000 +0100
@@ -909,6 +909,11 @@  xfs_file_fallocate(
 	if (mode & FALLOC_FL_PUNCH_HOLE)
 		cmd = XFS_IOC_UNRESVSP;
 
+	if (IS_IMMUTABLE(inode)) {
+		error = -EPERM;
+		goto out_unlock;
+	}
+
 	/* check the new inode size is valid before allocating */
 	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
 	    offset + len > i_size_read(inode)) {
--- linux-2.6.38-rc5-orig/fs/gfs2/file.c	2011-02-16 04:23:45.000000000 +0100
+++ linux-2.6.38-rc5/fs/gfs2/file.c	2011-02-21 09:09:17.000000000 +0100
@@ -797,6 +797,11 @@  static long gfs2_fallocate(struct file *
 	if (unlikely(error))
 		goto out_uninit;
 
+	if (IS_IMMUTABLE(inode)) {
+		error = -EPERM;
+		goto out_unlock;
+	}
+
 	if (!gfs2_write_alloc_required(ip, offset, len))
 		goto out_unlock;