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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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31
fs/xfs/xfs_inode.c
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@ -958,7 +958,6 @@ xfs_dir_ialloc(
xfs_inode_t *ip;
xfs_buf_t *ialloc_context = NULL;
int code;
void *dqinfo;
tp = *tpp;
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
@ -1002,41 +1001,13 @@ xfs_dir_ialloc(
* to succeed the second time.
*/
if (ialloc_context) {
/*
* Normally, xfs_trans_commit releases all the locks.
* We call bhold to hang on to the ialloc_context across
* the commit. Holding this buffer prevents any other
* processes from doing any allocations in this
* allocation group.
*/
xfs_trans_bhold(tp, ialloc_context);
/*
* 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 = NULL;
if (tp->t_dqinfo) {
dqinfo = (void *)tp->t_dqinfo;
tp->t_dqinfo = NULL;
}
code = xfs_trans_roll(&tp);
/*
* Re-attach the quota info that we detached from prev trx.
*/
if (dqinfo)
tp->t_dqinfo = dqinfo;
code = xfs_dialloc_roll(&tp, ialloc_context);
if (code) {
xfs_buf_relse(ialloc_context);
*tpp = tp;
*ipp = NULL;
return code;
}
xfs_trans_bjoin(tp, ialloc_context);
/*
* Call ialloc again. Since we've locked out all