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authorNeilBrown <neilb@suse.de>2011-07-28 11:31:49 +1000
committerNeilBrown <neilb@suse.de>2011-07-28 11:31:49 +1000
commit4367af556133723d0f443e14ca8170d9447317cb (patch)
treed87bb40920f0f43cea586b7dd99b45f713ffd614 /drivers/md/raid1.h
parent1f68f0c4b677ccd6935ff61e4e6888787505f8dc (diff)
md/raid1: 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> Reviewed-by: Namhyung Kim <namhyung@gmail.com>
Diffstat (limited to 'drivers/md/raid1.h')
-rw-r--r--drivers/md/raid1.h13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h
index aa6af37ca01..f81360d49af 100644
--- a/drivers/md/raid1.h
+++ b/drivers/md/raid1.h
@@ -116,7 +116,14 @@ struct r1bio_s {
* correct the read error. To keep track of bad blocks on a per-bio
* level, we store IO_BLOCKED in the appropriate 'bios' pointer
*/
-#define IO_BLOCKED ((struct bio*)1)
+#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 bios[n] to IO_MADE_GOOD
+ */
+#define IO_MADE_GOOD ((struct bio *)2)
+
+#define BIO_SPECIAL(bio) ((unsigned long)bio <= 2)
/* bits for r1bio.state */
#define R1BIO_Uptodate 0
@@ -135,6 +142,10 @@ struct r1bio_s {
* Record that bi_end_io was called with this flag...
*/
#define R1BIO_Returned 6
+/* If a write for this request means we can clear some
+ * known-bad-block records, we set this flag
+ */
+#define R1BIO_MadeGood 7
extern int md_raid1_congested(mddev_t *mddev, int bits);