Merge tag 'xfs-5.1-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs updates from Darrick Wong:
 "Here are a number of new features and bug fixes for 5.1

  They've undergone a week's worth of fstesting and merge cleanly with
  master as of this morning

  Most of the changes center on improving metadata validation and fixing
  problems with online fsck, though there's also a new cache to speed up
  unlinked inode handling and cleanup of the copy on write code in
  preparation for future features

  Changes for Linux 5.1:

   - Fix online fsck to handle inode btrees correctly on 64k block
     filesystems

   - Teach online fsck to check directory and attribute names for
     invalid characters

   - Miscellanous fixes for online fsck

   - Introduce a new panic mask so that we can halt immediately on
     metadata corruption (for debugging purposes)

   - Fix a block mapping race during writeback

   - Cache unlinked inode list backrefs in memory to speed up list
     processing

   - Separate the bnobt/cntbt and inobt/finobt buffer verifiers so that
     we can detect crosslinked btrees

   - Refactor magic number verification so that we can standardize it

   - Strengthen ondisk metadata structure offset build time verification

   - Fix a memory corruption problem in the listxattr code

   - Fix a shutdown problem during log recovery due to unreserved finobt
     expansion

   - Fix a referential integrity problem where O_TMPFILE inodes were put
     on the unlinked list with nlink > 0 which would cause asserts
     during log recovery if the system went down immediately

   - Refactor the delayed allocation allocator to be more clever about
     the possibility that its mapping might be stale

   - Various fixes to the copy on write mechanism

   - Make CoW preallocation suitable for use even with writes that
     wouldn't otherwise require it

   - Refactor an internal API

   - Fix some statx implementation bugs

   - Fix miscellaneous compiler and static checker complaints"

* tag 'xfs-5.1-merge-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (70 commits)
  xfs: fix reporting supported extra file attributes for statx()
  xfs: fix backwards endian conversion in scrub
  xfs: fix uninitialized error variables
  xfs: rework breaking of shared extents in xfs_file_iomap_begin
  xfs: don't pass iomap flags to xfs_reflink_allocate_cow
  xfs: fix uninitialized error variable
  xfs: introduce an always_cow mode
  xfs: report IOMAP_F_SHARED from xfs_file_iomap_begin_delay
  xfs: make COW fork unwritten extent conversions more robust
  xfs: merge COW handling into xfs_file_iomap_begin_delay
  xfs: also truncate holes covered by COW blocks
  xfs: don't use delalloc extents for COW on files with extsize hints
  xfs: fix SEEK_DATA for speculative COW fork preallocation
  xfs: make xfs_bmbt_to_iomap more useful
  xfs: fix xfs_buf magic number endian checks
  xfs: retry COW fork delalloc conversion when no extent was found
  xfs: remove the truncate short cut in xfs_map_blocks
  xfs: move xfs_iomap_write_allocate to xfs_aops.c
  xfs: move stat accounting to xfs_bmapi_convert_delalloc
  xfs: move transaction handling to xfs_bmapi_convert_delalloc
  ..

1 files changed, 9 insertions, 5 deletions

diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 9fe88d125f0a..3371d1ff27c4 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -2439,17 +2439,21 @@ xlog_recover_validate_buf_type(
 	case XFS_BLFT_BTREE_BUF:
 		switch (magic32) {
 		case XFS_ABTB_CRC_MAGIC:
-		case XFS_ABTC_CRC_MAGIC:
 		case XFS_ABTB_MAGIC:
+			bp->b_ops = &xfs_bnobt_buf_ops;
+			break;
+		case XFS_ABTC_CRC_MAGIC:
 		case XFS_ABTC_MAGIC:
-			bp->b_ops = &xfs_allocbt_buf_ops;
+			bp->b_ops = &xfs_cntbt_buf_ops;
 			break;
 		case XFS_IBT_CRC_MAGIC:
-		case XFS_FIBT_CRC_MAGIC:
 		case XFS_IBT_MAGIC:
-		case XFS_FIBT_MAGIC:
 			bp->b_ops = &xfs_inobt_buf_ops;
 			break;
+		case XFS_FIBT_CRC_MAGIC:
+		case XFS_FIBT_MAGIC:
+			bp->b_ops = &xfs_finobt_buf_ops;
+			break;
 		case XFS_BMAP_CRC_MAGIC:
 		case XFS_BMAP_MAGIC:
 			bp->b_ops = &xfs_bmbt_buf_ops;
@@ -3045,7 +3049,7 @@ xlog_recover_inode_pass2(
 	 * Make sure the place we're flushing out to really looks
 	 * like an inode!
 	 */
-	if (unlikely(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))) {
+	if (unlikely(!xfs_verify_magic16(bp, dip->di_magic))) {
 		xfs_alert(mp,
 	"%s: Bad inode magic number, dip = "PTR_FMT", dino bp = "PTR_FMT", ino = %Ld",
 			__func__, dip, bp, in_f->ilf_ino);