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xfs: realtime rmap btree transaction reservations

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Make sure that there's enough log reservation to handle mapping
and unmapping realtime extents.  We have to reserve enough space
to handle a split in the rtrmapbt to add the record and a second
split in the regular rmapbt to record the rtrmapbt split.

Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong
2024-11-20 16:20:22 -08:00
parent fc6856c6ff
commit e1c76fce50
3 changed files with 26 additions and 3 deletions
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4
fs/xfs/libxfs/xfs_exchmaps.c
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@@ -662,7 +662,9 @@ xfs_exchmaps_rmapbt_blocks(
if (!xfs_has_rmapbt(mp))
return 0;
if (XFS_IS_REALTIME_INODE(req->ip1))
return 0;
return howmany_64(req->nr_exchanges,
XFS_MAX_CONTIG_RTRMAPS_PER_BLOCK(mp)) *
XFS_RTRMAPADD_SPACE_RES(mp);
return howmany_64(req->nr_exchanges,
XFS_MAX_CONTIG_RMAPS_PER_BLOCK(mp)) *