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xfs: teach xfs_bmapi_remap to accept some bmapi flags 

Teach xfs_bmapi_remap how to map in unwritten extent and to skip rmap
updates.  This enables us to rebuild real and unwritten extents from the
rmapbt.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-05-14 06:34:35 -07:00
parent 7cf199ba5a
commit 7644bd988d
1 changed files with 8 additions and 2 deletions
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10
fs/xfs/libxfs/xfs_bmap.c
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@ -4543,7 +4543,10 @@ xfs_bmapi_remap(
ASSERT(len > 0);
ASSERT(len <= (xfs_filblks_t)MAXEXTLEN);
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK)));
ASSERT(!(flags & ~(XFS_BMAPI_ATTRFORK | XFS_BMAPI_PREALLOC |
XFS_BMAPI_NORMAP)));
ASSERT((flags & (XFS_BMAPI_ATTRFORK | XFS_BMAPI_PREALLOC)) !=
(XFS_BMAPI_ATTRFORK | XFS_BMAPI_PREALLOC));
if (unlikely(XFS_TEST_ERROR(
(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS &&
@ -4581,7 +4584,10 @@ xfs_bmapi_remap(
got.br_startoff = bno;
got.br_startblock = startblock;
got.br_blockcount = len;
got.br_state = XFS_EXT_NORM;
if (flags & XFS_BMAPI_PREALLOC)
got.br_state = XFS_EXT_UNWRITTEN;
else
got.br_state = XFS_EXT_NORM;
error = xfs_bmap_add_extent_hole_real(tp, ip, whichfork, &icur,
&cur, &got, &firstblock, dfops, &logflags, flags);