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xfs: factor debug code out of xlog_state_do_callback() 

Start making this function readable by lifting the debug code into
a conditional function.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Dave Chinner 2019-09-05 17:32:50 -07:00 committed by Darrick J. Wong
parent 8ab39f11d9
commit 6769aa2a4f
1 changed files with 44 additions and 35 deletions
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79
fs/xfs/xfs_log.c
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@ -2630,6 +2630,48 @@ xlog_get_lowest_lsn(
return lowest_lsn;
}
#ifdef DEBUG
/*
* Make one last gasp attempt to see if iclogs are being left in limbo. If the
* above loop finds an iclog earlier than the current iclog and in one of the
* syncing states, the current iclog is put into DO_CALLBACK and the callbacks
* are deferred to the completion of the earlier iclog. Walk the iclogs in order
* and make sure that no iclog is in DO_CALLBACK unless an earlier iclog is in
* one of the syncing states.
*
* Note that SYNCING|IOERROR is a valid state so we cannot just check for
* ic_state == SYNCING.
*/
static void
xlog_state_callback_check_state(
struct xlog *log)
{
struct xlog_in_core *first_iclog = log->l_iclog;
struct xlog_in_core *iclog = first_iclog;
do {
ASSERT(iclog->ic_state != XLOG_STATE_DO_CALLBACK);
/*
* Terminate the loop if iclogs are found in states
* which will cause other threads to clean up iclogs.
*
* SYNCING - i/o completion will go through logs
* DONE_SYNC - interrupt thread should be waiting for
* l_icloglock
* IOERROR - give up hope all ye who enter here
*/
if (iclog->ic_state == XLOG_STATE_WANT_SYNC ||
iclog->ic_state & XLOG_STATE_SYNCING ||
iclog->ic_state == XLOG_STATE_DONE_SYNC ||
iclog->ic_state == XLOG_STATE_IOERROR )
break;
iclog = iclog->ic_next;
} while (first_iclog != iclog);
}
#else
#define xlog_state_callback_check_state(l) ((void)0)
#endif
STATIC void
xlog_state_do_callback(
struct xlog *log,
@ -2804,41 +2846,8 @@ xlog_state_do_callback(
}
} while (!ioerrors && loopdidcallbacks);
#ifdef DEBUG
/*
* Make one last gasp attempt to see if iclogs are being left in limbo.
* If the above loop finds an iclog earlier than the current iclog and
* in one of the syncing states, the current iclog is put into
* DO_CALLBACK and the callbacks are deferred to the completion of the
* earlier iclog. Walk the iclogs in order and make sure that no iclog
* is in DO_CALLBACK unless an earlier iclog is in one of the syncing
* states.
*
* Note that SYNCING|IOABORT is a valid state so we cannot just check
* for ic_state == SYNCING.
*/
if (funcdidcallbacks) {
first_iclog = iclog = log->l_iclog;
do {
ASSERT(iclog->ic_state != XLOG_STATE_DO_CALLBACK);
/*
* Terminate the loop if iclogs are found in states
* which will cause other threads to clean up iclogs.
*
* SYNCING - i/o completion will go through logs
* DONE_SYNC - interrupt thread should be waiting for
* l_icloglock
* IOERROR - give up hope all ye who enter here
*/
if (iclog->ic_state == XLOG_STATE_WANT_SYNC ||
iclog->ic_state & XLOG_STATE_SYNCING ||
iclog->ic_state == XLOG_STATE_DONE_SYNC ||
iclog->ic_state == XLOG_STATE_IOERROR )
break;
iclog = iclog->ic_next;
} while (first_iclog != iclog);
}
#endif
if (funcdidcallbacks)
xlog_state_callback_check_state(log);
if (log->l_iclog->ic_state & (XLOG_STATE_ACTIVE|XLOG_STATE_IOERROR))
wake_up_all(&log->l_flush_wait);