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xfs: make the rtsummary repair fix the file size too

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LOLLM noticed that the rtsummary repair code will create a new rtsummary
with the correct file size, but it won't force the new file size to be
set on the existing rtsummary file, leaving the rtsummary corrupt.  Fix
this by setting up the tempfile mapping-exchange to run to the end of
both files, which is the magic offset needed to reset the file size.

Cc: stable@vger.kernel.org # v6.10
Fixes: abf039e2e4 ("xfs: online repair of realtime summaries")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Assisted-by: LOLLM # finding obvious bugs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
This commit is contained in:
Darrick J. Wong 2026-09-02 22:52:07 -07:00 committed by Carlos Maiolino
parent 3f9fd694fa
commit 6b760b3232
1 changed files with 2 additions and 1 deletions
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3
fs/xfs/scrub/rtsummary_repair.c
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@ -164,9 +164,10 @@ xrep_rtsummary(
/*
* Now exchange the contents. Nothing in repair uses the temporary
* buffer, so we can reuse it for the tempfile exchrange information.
* Use XFS_MAX_FILEOFF here so that we correct the rtsummary file size.
*/
error = xrep_tempexch_trans_reserve(sc, XFS_DATA_FORK, 0,
rts->rsumblocks, &rts->tempexch);
XFS_MAX_FILEOFF, &rts->tempexch);
if (error)
return error;