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path: root/fs/xfs/xfs_log_cil.c
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Diffstat (limited to 'fs/xfs/xfs_log_cil.c')
-rw-r--r--fs/xfs/xfs_log_cil.c57
1 files changed, 46 insertions, 11 deletions
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index 7e5455391176..b3425b34e3d5 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -97,7 +97,7 @@ xfs_cil_prepare_item(
{
/* Account for the new LV being passed in */
if (lv->lv_buf_len != XFS_LOG_VEC_ORDERED) {
- *diff_len += lv->lv_buf_len;
+ *diff_len += lv->lv_bytes;
*diff_iovecs += lv->lv_niovecs;
}
@@ -111,7 +111,7 @@ xfs_cil_prepare_item(
else if (old_lv != lv) {
ASSERT(lv->lv_buf_len != XFS_LOG_VEC_ORDERED);
- *diff_len -= old_lv->lv_buf_len;
+ *diff_len -= old_lv->lv_bytes;
*diff_iovecs -= old_lv->lv_niovecs;
kmem_free(old_lv);
}
@@ -239,7 +239,7 @@ xlog_cil_insert_format_items(
* that the space reservation accounting is correct.
*/
*diff_iovecs -= lv->lv_niovecs;
- *diff_len -= lv->lv_buf_len;
+ *diff_len -= lv->lv_bytes;
} else {
/* allocate new data chunk */
lv = kmem_zalloc(buf_size, KM_SLEEP|KM_NOFS);
@@ -259,6 +259,7 @@ xlog_cil_insert_format_items(
/* The allocated data region lies beyond the iovec region */
lv->lv_buf_len = 0;
+ lv->lv_bytes = 0;
lv->lv_buf = (char *)lv + buf_size - nbytes;
ASSERT(IS_ALIGNED((unsigned long)lv->lv_buf, sizeof(uint64_t)));
@@ -385,7 +386,15 @@ 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 +573,18 @@ 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 +829,13 @@ 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 +859,12 @@ 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 +873,17 @@ 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;
}
/*