return container_of(lip, struct xfs_buf_log_item, bli_item);
}
-STATIC void xfs_buf_do_callbacks(struct xfs_buf *bp);
+static void xfs_buf_item_done(struct xfs_buf *bp);
/* Is this log iovec plausibly large enough to contain the buffer log format? */
bool
* the AIL lock.
*/
if (bip->bli_flags & XFS_BLI_STALE_INODE) {
- lip->li_cb(bp, lip);
+ xfs_buf_item_done(bp);
xfs_iflush_done(bp);
- bp->b_log_item = NULL;
} else {
xfs_trans_ail_delete(lip, SHUTDOWN_LOG_IO_ERROR);
xfs_buf_item_relse(bp);
list_add_tail(&lip->li_bio_list, &bp->b_li_list);
}
-/*
- * We can have many callbacks on a buffer. Running the callbacks individually
- * can cause a lot of contention on the AIL lock, so we allow for a single
- * callback to be able to scan the remaining items in bp->b_li_list for other
- * items of the same type and callback to be processed in the first call.
- *
- * As a result, the loop walking the callback list below will also modify the
- * list. it removes the first item from the list and then runs the callback.
- * The loop then restarts from the new first item int the list. This allows the
- * callback to scan and modify the list attached to the buffer and we don't
- * have to care about maintaining a next item pointer.
- */
-STATIC void
-xfs_buf_do_callbacks(
- struct xfs_buf *bp)
-{
- struct xfs_buf_log_item *blip = bp->b_log_item;
- struct xfs_log_item *lip;
-
- /* If there is a buf_log_item attached, run its callback */
- if (blip) {
- lip = &blip->bli_item;
- lip->li_cb(bp, lip);
- }
-
- while (!list_empty(&bp->b_li_list)) {
- lip = list_first_entry(&bp->b_li_list, struct xfs_log_item,
- li_bio_list);
-
- /*
- * Remove the item from the list, so we don't have any
- * confusion if the item is added to another buf.
- * Don't touch the log item after calling its
- * callback, because it could have freed itself.
- */
- list_del_init(&lip->li_bio_list);
- lip->li_cb(bp, lip);
- }
-}
-
/*
* Invoke the error state callback for each log item affected by the failed I/O.
*
xfs_buf_do_callbacks_fail(
struct xfs_buf *bp)
{
+ struct xfs_ail *ailp = bp->b_mount->m_ail;
struct xfs_log_item *lip;
- struct xfs_ail *ailp;
/*
* Buffer log item errors are handled directly by xfs_buf_item_push()
if (list_empty(&bp->b_li_list))
return;
- lip = list_first_entry(&bp->b_li_list, struct xfs_log_item,
- li_bio_list);
- ailp = lip->li_ailp;
spin_lock(&ailp->ail_lock);
list_for_each_entry(lip, &bp->b_li_list, li_bio_list) {
if (lip->li_ops->iop_error)
xfs_buf_iodone_callback_error(
struct xfs_buf *bp)
{
- struct xfs_buf_log_item *bip = bp->b_log_item;
- struct xfs_log_item *lip;
- struct xfs_mount *mp;
+ struct xfs_mount *mp = bp->b_mount;
static ulong lasttime;
static xfs_buftarg_t *lasttarg;
struct xfs_error_cfg *cfg;
- /*
- * The failed buffer might not have a buf_log_item attached or the
- * log_item list might be empty. Get the mp from the available
- * xfs_log_item
- */
- lip = list_first_entry_or_null(&bp->b_li_list, struct xfs_log_item,
- li_bio_list);
- mp = lip ? lip->li_mountp : bip->bli_item.li_mountp;
-
/*
* If we've already decided to shutdown the filesystem because of
* I/O errors, there's no point in giving this a retry.
}
static void
-xfs_buf_run_callbacks(
+xfs_buf_item_done(
struct xfs_buf *bp)
{
+ struct xfs_buf_log_item *bip = bp->b_log_item;
- if (xfs_buf_had_callback_errors(bp))
+ if (!bip)
return;
- xfs_buf_do_callbacks(bp);
+
+ /*
+ * If we are forcibly shutting down, this may well be off the AIL
+ * already. That's because we simulate the log-committed callbacks to
+ * unpin these buffers. Or we may never have put this item on AIL
+ * because of the transaction was aborted forcibly.
+ * xfs_trans_ail_delete() takes care of these.
+ *
+ * Either way, AIL is useless if we're forcing a shutdown.
+ */
+ xfs_trans_ail_delete(&bip->bli_item, SHUTDOWN_CORRUPT_INCORE);
bp->b_log_item = NULL;
+ xfs_buf_item_free(bip);
+ xfs_buf_rele(bp);
}
/*
xfs_buf_inode_iodone(
struct xfs_buf *bp)
{
- struct xfs_buf_log_item *blip = bp->b_log_item;
- struct xfs_log_item *lip;
-
if (xfs_buf_had_callback_errors(bp))
return;
- /* If there is a buf_log_item attached, run its callback */
- if (blip) {
- lip = &blip->bli_item;
- lip->li_cb(bp, lip);
- bp->b_log_item = NULL;
- }
-
+ xfs_buf_item_done(bp);
xfs_iflush_done(bp);
xfs_buf_ioend_finish(bp);
}
xfs_buf_dquot_iodone(
struct xfs_buf *bp)
{
- struct xfs_buf_log_item *blip = bp->b_log_item;
- struct xfs_log_item *lip;
-
if (xfs_buf_had_callback_errors(bp))
return;
/* a newly allocated dquot buffer might have a log item attached */
- if (blip) {
- lip = &blip->bli_item;
- lip->li_cb(bp, lip);
- bp->b_log_item = NULL;
- }
-
+ xfs_buf_item_done(bp);
xfs_dquot_done(bp);
xfs_buf_ioend_finish(bp);
}
/*
* Dirty buffer iodone callback function.
+ *
+ * Note that for things like remote attribute buffers, there may not be a buffer
+ * log item here, so processing the buffer log item must remain be optional.
*/
void
xfs_buf_iodone(
struct xfs_buf *bp)
{
- xfs_buf_run_callbacks(bp);
- xfs_buf_ioend_finish(bp);
-}
-
-/*
- * This is the iodone() function for buffers which have been
- * logged. It is called when they are eventually flushed out.
- * It should remove the buf item from the AIL, and free the buf item.
- * It is called by xfs_buf_iodone_callbacks() above which will take
- * care of cleaning up the buffer itself.
- */
-void
-xfs_buf_item_iodone(
- struct xfs_buf *bp,
- struct xfs_log_item *lip)
-{
- ASSERT(BUF_ITEM(lip)->bli_buf == bp);
-
- xfs_buf_rele(bp);
+ if (xfs_buf_had_callback_errors(bp))
+ return;
- /*
- * If we are forcibly shutting down, this may well be off the AIL
- * already. That's because we simulate the log-committed callbacks to
- * unpin these buffers. Or we may never have put this item on AIL
- * because of the transaction was aborted forcibly.
- * xfs_trans_ail_delete() takes care of these.
- *
- * Either way, AIL is useless if we're forcing a shutdown.
- */
- xfs_trans_ail_delete(lip, SHUTDOWN_CORRUPT_INCORE);
- xfs_buf_item_free(BUF_ITEM(lip));
+ xfs_buf_item_done(bp);
+ xfs_buf_ioend_finish(bp);
}
projects / linux.git / commitdiff