summaryrefslogtreecommitdiff
path: root/drivers/md
diff options
context:
space:
mode:
authorNeilBrown <neilb@suse.de>2011-07-28 11:31:48 +1000
committerNeilBrown <neilb@suse.de>2011-07-28 11:31:48 +1000
commitd7a9d443bc8a75a24873c0506f50051edfedc714 (patch)
tree6255771f6cca87698dcc8eb11d62e7fc217b8d0b /drivers/md
parent06f603851fa90bcd236328438278d4dc8b655495 (diff)
md: add 'write_error' flag to component devices.
If a device has ever seen a write error, we will want to handle known-bad-blocks differently. So create an appropriate state flag and export it via sysfs. Signed-off-by: NeilBrown <neilb@suse.de> Reviewed-by: Namhyung Kim <namhyung@gmail.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/md.c12
-rw-r--r--drivers/md/md.h3
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 48217e8aa0e..1520d18c5af 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2516,6 +2516,10 @@ state_show(mdk_rdev_t *rdev, char *page)
len += sprintf(page+len, "%sspare", sep);
sep = ",";
}
+ if (test_bit(WriteErrorSeen, &rdev->flags)) {
+ len += sprintf(page+len, "%swrite_error", sep);
+ sep = ",";
+ }
return len+sprintf(page+len, "\n");
}
@@ -2530,6 +2534,8 @@ state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
* blocked - sets the Blocked flag
* -blocked - clears the Blocked flag
* insync - sets Insync providing device isn't active
+ * write_error - sets WriteErrorSeen
+ * -write_error - clears WriteErrorSeen
*/
int err = -EINVAL;
if (cmd_match(buf, "faulty") && rdev->mddev->pers) {
@@ -2565,6 +2571,12 @@ state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
} else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) {
set_bit(In_sync, &rdev->flags);
err = 0;
+ } else if (cmd_match(buf, "write_error")) {
+ set_bit(WriteErrorSeen, &rdev->flags);
+ err = 0;
+ } else if (cmd_match(buf, "-write_error")) {
+ clear_bit(WriteErrorSeen, &rdev->flags);
+ err = 0;
}
if (!err)
sysfs_notify_dirent_safe(rdev->sysfs_state);
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 7c3192c0a29..fa4b607854a 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -84,6 +84,9 @@ struct mdk_rdev_s
#define Blocked 8 /* An error occurred on an externally
* managed array, don't allow writes
* until it is cleared */
+#define WriteErrorSeen 9 /* A write error has been seen on this
+ * device
+ */
wait_queue_head_t blocked_wait;
int desc_nr; /* descriptor index in the superblock */