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xfs: saner xfs_trans_commit interface

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The flags argument to xfs_trans_commit is not useful for most callers, as
a commit of a transaction without a permanent log reservation must pass
0 here, and all callers for a transaction with a permanent log reservation
except for xfs_trans_roll must pass XFS_TRANS_RELEASE_LOG_RES.  So remove
the flags argument from the public xfs_trans_commit interfaces, and
introduce low-level __xfs_trans_commit variant just for xfs_trans_roll
that regrants a log reservation instead of releasing it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Christoph Hellwig
2015-06-04 13:48:08 +10:00
committed by Dave Chinner
parent 4906e21545
commit 70393313dd
24 changed files with 68 additions and 74 deletions
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35
fs/xfs/xfs_trans.c
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@@ -892,26 +892,16 @@ xfs_trans_committed_bulk(
* have already been unlocked as if the commit had succeeded.
* Do not reference the transaction structure after this call.
*/
int
xfs_trans_commit(
static int
__xfs_trans_commit(
struct xfs_trans *tp,
uint flags)
bool regrant)
{
struct xfs_mount *mp = tp->t_mountp;
xfs_lsn_t commit_lsn = -1;
int error = 0;
int log_flags = 0;
int sync = tp->t_flags & XFS_TRANS_SYNC;
/*
* Determine whether this commit is releasing a permanent
* log reservation or not.
*/
if (flags & XFS_TRANS_RELEASE_LOG_RES) {
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
log_flags = XFS_LOG_REL_PERM_RESERV;
}
/*
* If there is nothing to be logged by the transaction,
* then unlock all of the items associated with the
@@ -936,7 +926,7 @@ xfs_trans_commit(
xfs_trans_apply_sb_deltas(tp);
xfs_trans_apply_dquot_deltas(tp);
xfs_log_commit_cil(mp, tp, &commit_lsn, flags);
xfs_log_commit_cil(mp, tp, &commit_lsn, regrant);
current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
xfs_trans_free(tp);
@@ -964,6 +954,12 @@ out_unreserve:
*/
xfs_trans_unreserve_and_mod_dquots(tp);
if (tp->t_ticket) {
int log_flags = 0;
if (regrant)
ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
else
log_flags = XFS_LOG_REL_PERM_RESERV;
commit_lsn = xfs_log_done(mp, tp->t_ticket, NULL, log_flags);
if (commit_lsn == -1 && !error)
error = -EIO;
@@ -976,6 +972,13 @@ out_unreserve:
return error;
}
int
xfs_trans_commit(
struct xfs_trans *tp)
{
return __xfs_trans_commit(tp, false);
}
/*
* Unlock all of the transaction's items and free the transaction.
* The transaction must not have modified any of its items, because
@@ -1029,7 +1032,7 @@ xfs_trans_cancel(
/*
* Roll from one trans in the sequence of PERMANENT transactions to
* the next: permanent transactions are only flushed out when
* committed with XFS_TRANS_RELEASE_LOG_RES, but we still want as soon
* committed with xfs_trans_commit(), but we still want as soon
* as possible to let chunks of it go to the log. So we commit the
* chunk we've been working on and get a new transaction to continue.
*/
@@ -1063,7 +1066,7 @@ xfs_trans_roll(
* is in progress. The caller takes the responsibility to cancel
* the duplicate transaction that gets returned.
*/
error = xfs_trans_commit(trans, 0);
error = __xfs_trans_commit(trans, true);
if (error)
return error;