Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 updates from Ted Ts'o:
 "Bug fixes and clean ups for the 3.17 merge window"

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix ext4_discard_allocated_blocks() if we can't allocate the pa struct
  ext4: fix COLLAPSE RANGE test for bigalloc file systems
  ext4: check inline directory before converting
  ext4: fix incorrect locking in move_extent_per_page
  ext4: use correct depth value
  ext4: add i_data_sem sanity check
  ext4: fix wrong size computation in ext4_mb_normalize_request()
  ext4: make ext4_has_inline_data() as a inline function
  ext4: remove readpage() check in ext4_mmap_file()
  ext4: fix punch hole on files with indirect mapping
  ext4: remove metadata reservation checks
  ext4: rearrange initialization to fix EXT4FS_DEBUG

1 files changed, 25 insertions, 0 deletions

diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index ef1bed6..0bb3f9e 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -571,6 +571,31 @@ static int ext4_release_dir(struct inode *inode, struct file *filp)
 	return 0;
 }
 
+int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, void *buf,
+		      int buf_size)
+{
+	struct ext4_dir_entry_2 *de;
+	int nlen, rlen;
+	unsigned int offset = 0;
+	char *top;
+
+	de = (struct ext4_dir_entry_2 *)buf;
+	top = buf + buf_size;
+	while ((char *) de < top) {
+		if (ext4_check_dir_entry(dir, NULL, de, bh,
+					 buf, buf_size, offset))
+			return -EIO;
+		nlen = EXT4_DIR_REC_LEN(de->name_len);
+		rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
+		de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
+		offset += rlen;
+	}
+	if ((char *) de > top)
+		return -EIO;
+
+	return 0;
+}
+
 const struct file_operations ext4_dir_operations = {
 	.llseek		= ext4_dir_llseek,
 	.read		= generic_read_dir,