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authorNeilBrown <neilb@suse.de>2011-07-28 11:39:24 +1000
committerNeilBrown <neilb@suse.de>2011-07-28 11:39:24 +1000
commit749c55e942d91cb27045fe2eb313aa5afe68ae0b (patch)
treeddf80a1eb3ef9005bc209c1c4946916b89c22a33 /drivers/md/raid10.h
parentd4432c23be957ff061f7b23fd60e8506cb472a55 (diff)
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md/raid10: clear bad-block record when write succeeds.
If we succeed in writing to a block that was recorded as being bad, we clear the bad-block record. This requires some delayed handling as the bad-block-list update has to happen in process-context. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid10.h')
-rw-r--r--drivers/md/raid10.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/md/raid10.h b/drivers/md/raid10.h
index c646152ba4e4..d8b7f9af92d5 100644
--- a/drivers/md/raid10.h
+++ b/drivers/md/raid10.h
@@ -118,6 +118,13 @@ struct r10bio_s {
* level, we store IO_BLOCKED in the appropriate 'bios' pointer
*/
#define IO_BLOCKED ((struct bio*)1)
+/* When we successfully write to a known bad-block, we need to remove the
+ * bad-block marking which must be done from process context. So we record
+ * the success by setting devs[n].bio to IO_MADE_GOOD
+ */
+#define IO_MADE_GOOD ((struct bio *)2)
+
+#define BIO_SPECIAL(bio) ((unsigned long)bio <= 2)
/* bits for r10bio.state */
#define R10BIO_Uptodate 0
@@ -128,4 +135,8 @@ struct r10bio_s {
* so that raid10d knows what to do with them.
*/
#define R10BIO_ReadError 4
+/* If a write for this request means we can clear some
+ * known-bad-block records, we set this flag.
+ */
+#define R10BIO_MadeGood 5
#endif