@@ -27,7 +27,7 @@
#include "xfs_buf_item.h"
#include "xfs_ag.h"
#include "xfs_quota.h"
-
+#include "xfs_reflink.h"
#define BLK_AVG(blk1, blk2) ((blk1+blk2) >> 1)
@@ -3502,6 +3502,28 @@ xlog_recover_finish(
xlog_recover_process_iunlinks(log);
xlog_recover_check_summary(log);
+
+ /*
+ * Recover any CoW staging blocks that are still referenced by the
+ * ondisk refcount metadata. During mount there cannot be any live
+ * staging extents as we have not permitted any user modifications.
+ * Therefore, it is safe to free them all right now, even on a
+ * read-only mount.
+ */
+ error = xfs_reflink_recover_cow(log->l_mp);
+ if (error) {
+ xfs_alert(log->l_mp,
+ "Failed to recover leftover CoW staging extents, err %d.",
+ error);
+ /*
+ * If we get an error here, make sure the log is shut down
+ * but return zero so that any log items committed since the
+ * end of intents processing can be pushed through the CIL
+ * and AIL.
+ */
+ xfs_force_shutdown(log->l_mp, SHUTDOWN_LOG_IO_ERROR);
+ }
+
return 0;
}
@@ -922,15 +922,6 @@ xfs_mountfs(
xfs_warn(mp,
"Unable to allocate reserve blocks. Continuing without reserve pool.");
- /* Recover any CoW blocks that never got remapped. */
- error = xfs_reflink_recover_cow(mp);
- if (error) {
- xfs_err(mp,
- "Error %d recovering leftover CoW allocations.", error);
- xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
- goto out_quota;
- }
-
/* Reserve AG blocks for future btree expansion. */
error = xfs_fs_reserve_ag_blocks(mp);
if (error && error != -ENOSPC)
@@ -941,7 +932,6 @@ xfs_mountfs(
out_agresv:
xfs_fs_unreserve_ag_blocks(mp);
- out_quota:
xfs_qm_unmount_quotas(mp);
out_rtunmount:
xfs_rtunmount_inodes(mp);
@@ -749,7 +749,10 @@ xfs_reflink_end_cow(
}
/*
- * Free leftover CoW reservations that didn't get cleaned out.
+ * Free all CoW staging blocks that are still referenced by the ondisk refcount
+ * metadata. The ondisk metadata does not track which inode created the
+ * staging extent, so callers must ensure that there are no cached inodes with
+ * live CoW staging extents.
*/
int
xfs_reflink_recover_cow(
@@ -1742,15 +1742,6 @@ xfs_remount_rw(
*/
xfs_restore_resvblks(mp);
xfs_log_work_queue(mp);
-
- /* Recover any CoW blocks that never got remapped. */
- error = xfs_reflink_recover_cow(mp);
- if (error) {
- xfs_err(mp,
- "Error %d recovering leftover CoW allocations.", error);
- xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
- return error;
- }
xfs_blockgc_start(mp);
/* Create the per-AG metadata reservation pool .*/