diff options
| author | Brian Foster <bfoster@redhat.com> | 2018-07-12 08:26:29 +0300 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-07-12 08:26:29 +0300 |
| commit | cf612de732cb6ef626019ca085406d183f0a055a (patch) | |
| tree | f95e717e594fba97786d2233f24753c349b4792d /fs/xfs/libxfs/xfs_bmap_btree.c | |
| parent | 280253d213fb735b565532be2836f94cf574260d (diff) | |
| download | linux-cf612de732cb6ef626019ca085406d183f0a055a.tar.xz | |
xfs: remove xfs_btree_cur private firstblock field
The bmbt cursor private structure has a firstblock field that is
used to maintain locking order on bmbt allocations. The field holds
an actual firstblock value (as opposed to a pointer), so it is
initialized on cursor creation, updated on allocation and then the
value is transferred back to the source before the cursor is
destroyed.
This value is always transferred from and back to the ->t_firstblock
field. Since xfs_btree_cur already carries a reference to the
transaction, we can remove this field from xfs_btree_cur and the
associated copying. The bmbt allocations will update the value in
the transaction directly.
Signed-off-by: Brian Foster <bfoster@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>
Diffstat (limited to 'fs/xfs/libxfs/xfs_bmap_btree.c')
| -rw-r--r-- | fs/xfs/libxfs/xfs_bmap_btree.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c index e8b01af09db5..8a9b98b11e34 100644 --- a/fs/xfs/libxfs/xfs_bmap_btree.c +++ b/fs/xfs/libxfs/xfs_bmap_btree.c @@ -175,7 +175,6 @@ xfs_bmbt_dup_cursor( * Copy the firstblock, dfops, and flags values, * since init cursor doesn't get them. */ - new->bc_private.b.firstblock = cur->bc_private.b.firstblock; new->bc_private.b.flags = cur->bc_private.b.flags; return new; @@ -186,11 +185,11 @@ xfs_bmbt_update_cursor( struct xfs_btree_cur *src, struct xfs_btree_cur *dst) { - ASSERT((dst->bc_private.b.firstblock != NULLFSBLOCK) || + ASSERT((dst->bc_tp->t_firstblock != NULLFSBLOCK) || (dst->bc_private.b.ip->i_d.di_flags & XFS_DIFLAG_REALTIME)); dst->bc_private.b.allocated += src->bc_private.b.allocated; - dst->bc_private.b.firstblock = src->bc_private.b.firstblock; + dst->bc_tp->t_firstblock = src->bc_tp->t_firstblock; src->bc_private.b.allocated = 0; } @@ -208,7 +207,7 @@ xfs_bmbt_alloc_block( memset(&args, 0, sizeof(args)); args.tp = cur->bc_tp; args.mp = cur->bc_mp; - args.fsbno = cur->bc_private.b.firstblock; + args.fsbno = cur->bc_tp->t_firstblock; args.firstblock = args.fsbno; xfs_rmap_ino_bmbt_owner(&args.oinfo, cur->bc_private.b.ip->i_ino, cur->bc_private.b.whichfork); @@ -263,7 +262,7 @@ xfs_bmbt_alloc_block( } ASSERT(args.len == 1); - cur->bc_private.b.firstblock = args.fsbno; + cur->bc_tp->t_firstblock = args.fsbno; cur->bc_private.b.allocated++; cur->bc_private.b.ip->i_d.di_nblocks++; xfs_trans_log_inode(args.tp, cur->bc_private.b.ip, XFS_ILOG_CORE); @@ -562,7 +561,6 @@ xfs_bmbt_init_cursor( cur->bc_private.b.forksize = XFS_IFORK_SIZE(ip, whichfork); cur->bc_private.b.ip = ip; - cur->bc_private.b.firstblock = NULLFSBLOCK; cur->bc_private.b.allocated = 0; cur->bc_private.b.flags = 0; cur->bc_private.b.whichfork = whichfork; |