diff options
| author |   Christoph Hellwig <hch@lst.de> | 2017-11-03 10:34:44 -0700 |
|---|---|---|
| committer |   Darrick J. Wong <darrick.wong@oracle.com> | 2017-11-06 11:53:40 -0800 |
| commit | b121459c7a56d2fb5a8ca6727bf9f87982738b01 (patch) | |
| tree | 533094a7a0f1f16f6b41dbfe915eb4849ff714ad /fs/xfs/xfs_reflink.c | |
| parent | xfs: iterate backwards in xfs_reflink_cancel_cow_blocks (diff) | |
| download | linux-dev-b121459c7a56d2fb5a8ca6727bf9f87982738b01.tar.xz linux-dev-b121459c7a56d2fb5a8ca6727bf9f87982738b01.zip | |
xfs: simplify xfs_reflink_convert_cow
Instead of looking up extents to convert and calling xfs_bmapi_write on
each of them just let xfs_bmapi_write handle the full range. To make
this robust add a new XFS_BMAPI_CONVERT_ONLY that only converts ranges
and never allocates blocks.
[darrick: shorten the stringified CONVERT_ONLY trace flag]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/xfs/xfs_reflink.c')
| -rw-r--r-- | fs/xfs/xfs_reflink.c | 29 |
1 files changed, 11 insertions, 18 deletions
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index cf976ed65260..cc041a29eb70 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -353,29 +353,22 @@ xfs_reflink_convert_cow( xfs_off_t offset, xfs_off_t count) { - struct xfs_bmbt_irec got; - struct xfs_defer_ops dfops; struct xfs_mount *mp = ip->i_mount; - struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK); xfs_fileoff_t offset_fsb = XFS_B_TO_FSBT(mp, offset); xfs_fileoff_t end_fsb = XFS_B_TO_FSB(mp, offset + count); - struct xfs_iext_cursor icur; - bool found; - int error = 0; - - xfs_ilock(ip, XFS_ILOCK_EXCL); + xfs_filblks_t count_fsb = end_fsb - offset_fsb; + struct xfs_bmbt_irec imap; + struct xfs_defer_ops dfops; + xfs_fsblock_t first_block = NULLFSBLOCK; + int nimaps = 1, error = 0; - /* Convert all the extents to real from unwritten. */ - for (found = xfs_iext_lookup_extent(ip, ifp, offset_fsb, &icur, &got); - found && got.br_startoff < end_fsb; - found = xfs_iext_next_extent(ifp, &icur, &got)) { - error = xfs_reflink_convert_cow_extent(ip, &got, offset_fsb, - end_fsb - offset_fsb, &dfops); - if (error) - break; - } + ASSERT(count != 0); - /* Finish up. */ + xfs_ilock(ip, XFS_ILOCK_EXCL); + error = xfs_bmapi_write(NULL, ip, offset_fsb, count_fsb, + XFS_BMAPI_COWFORK | XFS_BMAPI_CONVERT | + XFS_BMAPI_CONVERT_ONLY, &first_block, 0, &imap, &nimaps, + &dfops); xfs_iunlock(ip, XFS_ILOCK_EXCL); return error; } |