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-rw-r--r--fs/xfs/xfs_log.c9
-rw-r--r--fs/xfs/xfs_log_cil.c50
2 files changed, 48 insertions, 11 deletions
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index 8497a00e399d..82f5602d97e2 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -3915,11 +3915,14 @@ xfs_log_force_umount(
retval = xlog_state_ioerror(log);
spin_unlock(&log->l_icloglock);
}
+
/*
- * Wake up everybody waiting on xfs_log_force.
- * Callback all log item committed functions as if the
- * log writes were completed.
+ * Wake up everybody waiting on xfs_log_force. Wake the CIL push first
+ * as if the log writes were completed. The abort handling in the log
+ * item committed callback functions will do this again under lock to
+ * avoid races.
*/
+ wake_up_all(&log->l_cilp->xc_commit_wait);
xlog_state_do_callback(log, XFS_LI_ABORTED, NULL);
#ifdef XFSERRORDEBUG
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index 7e5455391176..039c873e6fb2 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -385,7 +385,15 @@ xlog_cil_committed(
xfs_extent_busy_clear(mp, &ctx->busy_extents,
(mp->m_flags & XFS_MOUNT_DISCARD) && !abort);
+ /*
+ * If we are aborting the commit, wake up anyone waiting on the
+ * committing list. If we don't, then a shutdown we can leave processes
+ * waiting in xlog_cil_force_lsn() waiting on a sequence commit that
+ * will never happen because we aborted it.
+ */
spin_lock(&ctx->cil->xc_push_lock);
+ if (abort)
+ wake_up_all(&ctx->cil->xc_commit_wait);
list_del(&ctx->committing);
spin_unlock(&ctx->cil->xc_push_lock);
@@ -564,8 +572,18 @@ restart:
spin_lock(&cil->xc_push_lock);
list_for_each_entry(new_ctx, &cil->xc_committing, committing) {
/*
+ * Avoid getting stuck in this loop because we were woken by the
+ * shutdown, but then went back to sleep once already in the
+ * shutdown state.
+ */
+ if (XLOG_FORCED_SHUTDOWN(log)) {
+ spin_unlock(&cil->xc_push_lock);
+ goto out_abort_free_ticket;
+ }
+
+ /*
* Higher sequences will wait for this one so skip them.
- * Don't wait for own own sequence, either.
+ * Don't wait for our own sequence, either.
*/
if (new_ctx->sequence >= ctx->sequence)
continue;
@@ -810,6 +828,13 @@ restart:
*/
spin_lock(&cil->xc_push_lock);
list_for_each_entry(ctx, &cil->xc_committing, committing) {
+ /*
+ * Avoid getting stuck in this loop because we were woken by the
+ * shutdown, but then went back to sleep once already in the
+ * shutdown state.
+ */
+ if (XLOG_FORCED_SHUTDOWN(log))
+ goto out_shutdown;
if (ctx->sequence > sequence)
continue;
if (!ctx->commit_lsn) {
@@ -833,14 +858,12 @@ restart:
* push sequence after the above wait loop and the CIL still contains
* dirty objects.
*
- * When the push occurs, it will empty the CIL and
- * atomically increment the currect sequence past the push sequence and
- * move it into the committing list. Of course, if the CIL is clean at
- * the time of the push, it won't have pushed the CIL at all, so in that
- * case we should try the push for this sequence again from the start
- * just in case.
+ * When the push occurs, it will empty the CIL and atomically increment
+ * the currect sequence past the push sequence and move it into the
+ * committing list. Of course, if the CIL is clean at the time of the
+ * push, it won't have pushed the CIL at all, so in that case we should
+ * try the push for this sequence again from the start just in case.
*/
-
if (sequence == cil->xc_current_sequence &&
!list_empty(&cil->xc_cil)) {
spin_unlock(&cil->xc_push_lock);
@@ -849,6 +872,17 @@ restart:
spin_unlock(&cil->xc_push_lock);
return commit_lsn;
+
+ /*
+ * We detected a shutdown in progress. We need to trigger the log force
+ * to pass through it's iclog state machine error handling, even though
+ * we are already in a shutdown state. Hence we can't return
+ * NULLCOMMITLSN here as that has special meaning to log forces (i.e.
+ * LSN is already stable), so we return a zero LSN instead.
+ */
+out_shutdown:
+ spin_unlock(&cil->xc_push_lock);
+ return 0;
}
/*