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| author | Dan Williams <dan.j.williams@intel.com> | 2017-11-13 16:38:44 -0800 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2017-11-13 16:38:44 -0800 |
| commit | aaa422c4c3f6ee958ea9d6c9260ac40f90a3f4e9 (patch) | |
| tree | 64ce62bb891f903a5c504a2700823cbd60bb877c /fs/xfs | |
| parent | a39e596baa07cb1dc19c2ead14c9fd2a30f22352 (diff) | |
| download | op-kernel-dev-aaa422c4c3f6ee958ea9d6c9260ac40f90a3f4e9.zip op-kernel-dev-aaa422c4c3f6ee958ea9d6c9260ac40f90a3f4e9.tar.gz | |
fs, dax: unify IOMAP_F_DIRTY read vs write handling policy in the dax core
While reviewing whether MAP_SYNC should strengthen its current guarantee
of syncing writes from the initiating process to also include
third-party readers observing dirty metadata, Dave pointed out that the
check of IOMAP_WRITE is misplaced.
The policy of what to with IOMAP_F_DIRTY should be separated from the
generic filesystem mechanism of reporting dirty metadata. Move this
policy to the fs-dax core to simplify the per-filesystem iomap handlers,
and further centralize code that implements the MAP_SYNC policy. This
otherwise should not change behavior, it just makes it easier to change
behavior in the future.
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reported-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'fs/xfs')
| -rw-r--r-- | fs/xfs/xfs_iomap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index b43be19..3c0e4cf 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -1087,8 +1087,8 @@ xfs_file_iomap_begin( trace_xfs_iomap_found(ip, offset, length, 0, &imap); } - if ((flags & IOMAP_WRITE) && xfs_ipincount(ip) && - (ip->i_itemp->ili_fsync_fields & ~XFS_ILOG_TIMESTAMP)) + if (xfs_ipincount(ip) && (ip->i_itemp->ili_fsync_fields + & ~XFS_ILOG_TIMESTAMP)) iomap->flags |= IOMAP_F_DIRTY; xfs_bmbt_to_iomap(ip, iomap, &imap); |
