diff options
| author | Dave Chinner <dchinner@redhat.com> | 2018-05-09 17:49:09 +0300 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-05-10 18:56:46 +0300 |
| commit | c5295c6aad536ba7c257016632792f3031c21182 (patch) | |
| tree | 787e7454da892c8cd9db50d9f3838c160141a0cd /fs/xfs/xfs_reflink.c | |
| parent | 3565b660e56a78dea189fed75f359fe6d59b6023 (diff) | |
| download | linux-c5295c6aad536ba7c257016632792f3031c21182.tar.xz | |
xfs: fix double ijoin in xfs_reflink_cancel_cow_range
xfs_reflink_cancel_cow_range joins an inode twice to the same
transaction. This is not allowed, so fix it and document that the
callers of xfs_reflink_cancel_cow_blocks() must have already joined the
inode to the permanent transaction passed in.
Signed-Off-By: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
[darrick: edited the commit log to remove trace for nonexistent ASSERT]
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 | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index cdbd342a5249..bce2b5351d64 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -552,6 +552,9 @@ xfs_reflink_trim_irec_to_next_cow( * * If cancel_real is true this function cancels all COW fork extents for the * inode; if cancel_real is false, real extents are not cleared. + * + * Caller must have already joined the inode to the current transaction. The + * inode will be joined to the transaction returned to the caller. */ int xfs_reflink_cancel_cow_blocks( @@ -592,7 +595,6 @@ xfs_reflink_cancel_cow_blocks( if (error) break; } else if (del.br_state == XFS_EXT_UNWRITTEN || cancel_real) { - xfs_trans_ijoin(*tpp, ip, 0); xfs_defer_init(&dfops, &firstfsb); /* Free the CoW orphan record. */ @@ -1570,6 +1572,7 @@ xfs_reflink_clear_inode_flag( * We didn't find any shared blocks so turn off the reflink flag. * First, get rid of any leftover CoW mappings. */ + xfs_trans_ijoin(*tpp, ip, 0); error = xfs_reflink_cancel_cow_blocks(ip, tpp, 0, NULLFILEOFF, true); if (error) return error; @@ -1578,7 +1581,6 @@ xfs_reflink_clear_inode_flag( trace_xfs_reflink_unset_inode_flag(ip); ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; xfs_inode_clear_cowblocks_tag(ip); - xfs_trans_ijoin(*tpp, ip, 0); xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE); return error; |