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xfs: introduce xfs_dialloc_roll()

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Introduce a helper to make the on-disk inode allocation rolling
logic clearer in preparation of the following cleanup.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Dave Chinner
2020-12-09 10:02:17 -08:00
committed by Darrick J. Wong
parent 15574ebbff
commit aececc9f8d
3 changed files with 41 additions and 30 deletions
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35
fs/xfs/libxfs/xfs_ialloc.c
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@@ -1682,6 +1682,41 @@ error_cur:
return error;
}
int
xfs_dialloc_roll(
struct xfs_trans **tpp,
struct xfs_buf *agibp)
{
struct xfs_trans *tp = *tpp;
struct xfs_dquot_acct *dqinfo;
int error;
/*
* Hold to on to the agibp across the commit so no other allocation can
* come in and take the free inodes we just allocated for our caller.
*/
xfs_trans_bhold(tp, agibp);
/*
* We want the quota changes to be associated with the next transaction,
* NOT this one. So, detach the dqinfo from this and attach it to the
* next transaction.
*/
dqinfo = tp->t_dqinfo;
tp->t_dqinfo = NULL;
error = xfs_trans_roll(&tp);
/* Re-attach the quota info that we detached from prev trx. */
tp->t_dqinfo = dqinfo;
*tpp = tp;
if (error)
return error;
xfs_trans_bjoin(tp, agibp);
return 0;
}
/*
* Allocate an inode on disk.
*