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md/raid5: abort any pending parity operations when array fails.

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When the number of failed devices exceeds the allowed number
we must abort any active parity operations (checks or updates) as they
are no longer meaningful, and can lead to a BUG_ON in
handle_parity_checks6.

This bug was introduce by commit 6c0069c0ae
in 2.6.29.

Reported-by: Manish Katiyar <mkatiyar@gmail.com>
Tested-by: Manish Katiyar <mkatiyar@gmail.com>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: stable@kernel.org
This commit is contained in:
NeilBrown 2011-11-08 16:22:01 +11:00
parent 1ea6b8f489
commit 9a3f530f39
1 changed files with 8 additions and 4 deletions
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12
drivers/md/raid5.c
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@ -3159,10 +3159,14 @@ static void handle_stripe(struct stripe_head *sh)
/* check if the array has lost more than max_degraded devices and,
* if so, some requests might need to be failed.
*/
if (s.failed > conf->max_degraded && s.to_read+s.to_write+s.written)
handle_failed_stripe(conf, sh, &s, disks, &s.return_bi);
if (s.failed > conf->max_degraded && s.syncing)
handle_failed_sync(conf, sh, &s);
if (s.failed > conf->max_degraded) {
sh->check_state = 0;
sh->reconstruct_state = 0;
if (s.to_read+s.to_write+s.written)
handle_failed_stripe(conf, sh, &s, disks, &s.return_bi);
if (s.syncing)
handle_failed_sync(conf, sh, &s);
}
/*
* might be able to return some write requests if the parity blocks