xfs: prevent metadata files from being inactivated

Source kernel commit: 383e32b0d0db464dc53052a97bf7f9ee3a1937cc

Files containing metadata (quota records, rt bitmap and summary info)
are fully managed by the filesystem, which means that all resource
cleanup must be explicit, not automatic.  This means that they should
never be subjected automatic to post-eof truncation, nor should they be
freed automatically even if the link count drops to zero.

In other words, xfs_inactive() should leave these files alone.  Add the
necessary predicate functions to make this happen.  This adds a second
layer of prevention for the kinds of fs corruption that was fixed by
files, we should make all those metadata updates explicit.

Rearrange the order of #includes to fix compiler errors, since
xfs_mount.h is supposed to be included before xfs_inode.h

Followup-to: f4c32e87de7d ("xfs: fix realtime bitmap/summary file truncation when growing rt volume")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>

diff --git a/libxfs/xfs_iext_tree.c b/libxfs/xfs_iext_tree.c
index a52eed0426a2ea3304a2fa9dceb87c802588d6c3..7f5c4f403d6dd00c6011a81e36004103fd75b8c1 100644 (file)
--- a/libxfs/xfs_iext_tree.c
+++ b/libxfs/xfs_iext_tree.c
@@ -8,9 +8,9 @@
 #include "xfs_format.h"
 #include "xfs_bit.h"
 #include "xfs_log_format.h"
-#include "xfs_inode.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
+#include "xfs_inode.h"
 #include "xfs_trace.h"
 
 /*