mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 18:14:07 +08:00
md/raid5: write errors should be recorded as bad blocks if possible.
When a write error is detected, don't mark the device as failed immediately but rather record the fact for handle_stripe to deal with. Handle_stripe then attempts to record a bad block. Only if that fails does the device get marked as faulty. Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
parent
7f0da59bdc
commit
bc2607f393
@ -1658,8 +1658,10 @@ static void raid5_end_write_request(struct bio *bi, int error)
|
||||
return;
|
||||
}
|
||||
|
||||
if (!uptodate)
|
||||
md_error(conf->mddev, conf->disks[i].rdev);
|
||||
if (!uptodate) {
|
||||
set_bit(WriteErrorSeen, &conf->disks[i].rdev->flags);
|
||||
set_bit(R5_WriteError, &sh->dev[i].flags);
|
||||
}
|
||||
|
||||
rdev_dec_pending(conf->disks[i].rdev, conf->mddev);
|
||||
|
||||
@ -3038,6 +3040,14 @@ static void analyse_stripe(struct stripe_head *sh, struct stripe_head_state *s)
|
||||
if (sh->sector + STRIPE_SECTORS <= rdev->recovery_offset)
|
||||
set_bit(R5_Insync, &dev->flags);
|
||||
}
|
||||
if (test_bit(R5_WriteError, &dev->flags)) {
|
||||
clear_bit(R5_Insync, &dev->flags);
|
||||
if (!test_bit(Faulty, &rdev->flags)) {
|
||||
s->handle_bad_blocks = 1;
|
||||
atomic_inc(&rdev->nr_pending);
|
||||
} else
|
||||
clear_bit(R5_WriteError, &dev->flags);
|
||||
}
|
||||
if (!test_bit(R5_Insync, &dev->flags)) {
|
||||
/* The ReadError flag will just be confusing now */
|
||||
clear_bit(R5_ReadError, &dev->flags);
|
||||
@ -3086,6 +3096,11 @@ static void handle_stripe(struct stripe_head *sh)
|
||||
|
||||
analyse_stripe(sh, &s);
|
||||
|
||||
if (s.handle_bad_blocks) {
|
||||
set_bit(STRIPE_HANDLE, &sh->state);
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (unlikely(s.blocked_rdev)) {
|
||||
if (s.syncing || s.expanding || s.expanded ||
|
||||
s.to_write || s.written) {
|
||||
@ -3283,6 +3298,20 @@ finish:
|
||||
if (unlikely(s.blocked_rdev))
|
||||
md_wait_for_blocked_rdev(s.blocked_rdev, conf->mddev);
|
||||
|
||||
if (s.handle_bad_blocks)
|
||||
for (i = disks; i--; ) {
|
||||
mdk_rdev_t *rdev;
|
||||
struct r5dev *dev = &sh->dev[i];
|
||||
if (test_and_clear_bit(R5_WriteError, &dev->flags)) {
|
||||
/* We own a safe reference to the rdev */
|
||||
rdev = conf->disks[i].rdev;
|
||||
if (!rdev_set_badblocks(rdev, sh->sector,
|
||||
STRIPE_SECTORS, 0))
|
||||
md_error(conf->mddev, rdev);
|
||||
rdev_dec_pending(rdev, conf->mddev);
|
||||
}
|
||||
}
|
||||
|
||||
if (s.ops_request)
|
||||
raid_run_ops(sh, s.ops_request);
|
||||
|
||||
|
@ -249,6 +249,7 @@ struct stripe_head_state {
|
||||
|
||||
struct bio *return_bi;
|
||||
mdk_rdev_t *blocked_rdev;
|
||||
int handle_bad_blocks;
|
||||
};
|
||||
|
||||
/* Flags */
|
||||
@ -272,6 +273,7 @@ struct stripe_head_state {
|
||||
*/
|
||||
#define R5_Wantdrain 13 /* dev->towrite needs to be drained */
|
||||
#define R5_WantFUA 14 /* Write should be FUA */
|
||||
#define R5_WriteError 15 /* got a write error - need to record it */
|
||||
/*
|
||||
* Write method
|
||||
*/
|
||||
|
Loading…
Reference in New Issue
Block a user