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author | Darrick J. Wong <darrick.wong@oracle.com> | 2017-04-12 12:26:07 -0700 |
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committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-05-03 13:21:40 -0700 |
commit | fe0be23e68200573de027de9b8cc2b27e7fce35e (patch) | |
tree | a40dfe8284fd34d5cadca3bfee63fad922655946 /certs | |
parent | e20c8a517f259cb4d258e10b0cd5d4b30d4167a0 (diff) | |
download | linux-fe0be23e68200573de027de9b8cc2b27e7fce35e.tar.bz2 |
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 'certs')
0 files changed, 0 insertions, 0 deletions