xfs: remove all boilerplate defer init/finish code
At this point, the transaction subsystem completely manages deferred
items internally such that the common and boilerplate
xfs_trans_alloc() -> xfs_defer_init() -> xfs_defer_finish() ->
xfs_trans_commit() sequence can be replaced with a simple
transaction allocation and commit.
Remove all such boilerplate deferred ops code. In doing so, we
change each case over to use the dfops in the transaction and
specifically eliminate:
- The on-stack dfops and associated xfs_defer_init() call, as the
internal dfops is initialized on transaction allocation.
- xfs_bmap_finish() calls that precede a final xfs_trans_commit() of
a transaction.
- xfs_defer_cancel() calls in error handlers that precede a
transaction cancel.
The only deferred ops calls that remain are those that are
non-deterministic with respect to the final commit of the associated
transaction or are open-coded due to special handling.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
Reviewed-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>
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index bc471d4..86d7d2f 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -761,7 +761,6 @@ xfs_growfs_rt_alloc(
struct xfs_buf *bp; /* temporary buffer for zeroing */
xfs_daddr_t d; /* disk block address */
int error; /* error return value */
- struct xfs_defer_ops dfops; /* list of freed blocks */
xfs_fsblock_t fsbno; /* filesystem block for bno */
struct xfs_bmbt_irec map; /* block map output */
int nmap; /* number of block maps */
@@ -786,7 +785,6 @@ xfs_growfs_rt_alloc(
xfs_ilock(ip, XFS_ILOCK_EXCL);
xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
- xfs_defer_init(tp, &dfops);
/*
* Allocate blocks to the bitmap file.
*/
@@ -797,13 +795,10 @@ xfs_growfs_rt_alloc(
if (!error && nmap < 1)
error = -ENOSPC;
if (error)
- goto out_bmap_cancel;
+ goto out_trans_cancel;
/*
* Free any blocks freed up in the transaction, then commit.
*/
- error = xfs_defer_finish(&tp, tp->t_dfops);
- if (error)
- goto out_bmap_cancel;
error = xfs_trans_commit(tp);
if (error)
return error;
@@ -853,8 +848,6 @@ xfs_growfs_rt_alloc(
return 0;
-out_bmap_cancel:
- xfs_defer_cancel(tp->t_dfops);
out_trans_cancel:
xfs_trans_cancel(tp);
return error;