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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2017-04-12 12:26:07 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-05-03 13:21:40 -0700 |
| commit | fe0be23e68200573de027de9b8cc2b27e7fce35e (patch) | |
| tree | a40dfe8284fd34d5cadca3bfee63fad922655946 /fs/xfs/xfs_bmap_item.c | |
| parent | e20c8a517f259cb4d258e10b0cd5d4b30d4167a0 (diff) | |
| download | linux-fe0be23e68200573de027de9b8cc2b27e7fce35e.tar.gz | |
xfs: reserve enough blocks to handle btree splits when remapping
In xfs_reflink_end_cow, we erroneously reserve only enough blocks to handle adding 1 extent. This is problematic if we fragment free space, have to do CoW, and then have to perform multiple bmap btree expansions. Furthermore, the BUI recovery routine doesn't reserve /any/ blocks to handle btree splits, so log recovery fails after our first error causes the filesystem to go down. Therefore, refactor the transaction block reservation macros until we have a macro that works for our deferred (re)mapping activities, and fix both problems by using that macro. With 1k blocks we can hit this fairly often in g/187 if the scratch fs is big enough. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_bmap_item.c')
| -rw-r--r-- | fs/xfs/xfs_bmap_item.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c index 2d7017373e20..d419d23fa214 100644 --- a/fs/xfs/xfs_bmap_item.c +++ b/fs/xfs/xfs_bmap_item.c @@ -34,6 +34,8 @@ #include "xfs_bmap.h" #include "xfs_icache.h" #include "xfs_trace.h" +#include "xfs_bmap_btree.h" +#include "xfs_trans_space.h" kmem_zone_t *xfs_bui_zone; @@ -447,7 +449,8 @@ xfs_bui_recover( return -EIO; } - error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); + error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK), 0, 0, &tp); if (error) return error; budp = xfs_trans_get_bud(tp, buip); |