Merge tag 'xfs-6.10-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

Pull xfs fixes from Chandan Babu:

 - Always free only post-EOF delayed allocations for files with the
   XFS_DIFLAG_PREALLOC or APPEND flags set.

 - Do not align cow fork delalloc to cowextsz hint when running low on
   space.

 - Allow zero-size symlinks and directories as long as the link count is
   zero.

 - Change XFS_IOC_EXCHANGE_RANGE to be a _IOW only ioctl. This was ioctl
   was introduced during v6.10 developement cycle.

 - xfs_init_new_inode() now creates an attribute fork on a newly created
   inode even if ATTR feature flag is not enabled.

* tag 'xfs-6.10-fixes-5' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
  xfs: honor init_xattrs in xfs_init_new_inode for !ATTR fs
  xfs: fix direction in XFS_IOC_EXCHANGE_RANGE
  xfs: allow unlinked symlinks and dirs with zero size
  xfs: restrict when we try to align cow fork delalloc to cowextsz hints
  xfs: fix freeing speculative preallocations for preallocated files

1 files changed, 18 insertions, 5 deletions

diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index e7a7bfbe75b4..513b50da6215 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -379,10 +379,13 @@ xfs_dinode_verify_fork(
 		/*
 		 * A directory small enough to fit in the inode must be stored
 		 * in local format.  The directory sf <-> extents conversion
-		 * code updates the directory size accordingly.
+		 * code updates the directory size accordingly.  Directories
+		 * being truncated have zero size and are not subject to this
+		 * check.
 		 */
 		if (S_ISDIR(mode)) {
-			if (be64_to_cpu(dip->di_size) <= fork_size &&
+			if (dip->di_size &&
+			    be64_to_cpu(dip->di_size) <= fork_size &&
 			    fork_format != XFS_DINODE_FMT_LOCAL)
 				return __this_address;
 		}
@@ -528,9 +531,19 @@ xfs_dinode_verify(
 	if (mode && xfs_mode_to_ftype(mode) == XFS_DIR3_FT_UNKNOWN)
 		return __this_address;
 
-	/* No zero-length symlinks/dirs. */
-	if ((S_ISLNK(mode) || S_ISDIR(mode)) && di_size == 0)
-		return __this_address;
+	/*
+	 * No zero-length symlinks/dirs unless they're unlinked and hence being
+	 * inactivated.
+	 */
+	if ((S_ISLNK(mode) || S_ISDIR(mode)) && di_size == 0) {
+		if (dip->di_version > 1) {
+			if (dip->di_nlink)
+				return __this_address;
+		} else {
+			if (dip->di_onlink)
+				return __this_address;
+		}
+	}
 
 	fa = xfs_dinode_verify_nrext64(mp, dip);
 	if (fa)