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Diffstat (limited to 'drivers/md/raid5.c')
-rw-r--r--drivers/md/raid5.c94
1 files changed, 61 insertions, 33 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 087eee0cb809..3b27df52456b 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -94,6 +94,8 @@
#define __inline__
#endif
+#define printk_rl(args...) ((void) (printk_ratelimit() && printk(args)))
+
#if !RAID6_USE_EMPTY_ZERO_PAGE
/* In .bss so it's zeroed */
const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));
@@ -1143,10 +1145,12 @@ static void raid5_end_read_request(struct bio * bi, int error)
set_bit(R5_UPTODATE, &sh->dev[i].flags);
if (test_bit(R5_ReadError, &sh->dev[i].flags)) {
rdev = conf->disks[i].rdev;
- printk(KERN_INFO "raid5:%s: read error corrected (%lu sectors at %llu on %s)\n",
- mdname(conf->mddev), STRIPE_SECTORS,
- (unsigned long long)(sh->sector + rdev->data_offset),
- bdevname(rdev->bdev, b));
+ printk_rl(KERN_INFO "raid5:%s: read error corrected"
+ " (%lu sectors at %llu on %s)\n",
+ mdname(conf->mddev), STRIPE_SECTORS,
+ (unsigned long long)(sh->sector
+ + rdev->data_offset),
+ bdevname(rdev->bdev, b));
clear_bit(R5_ReadError, &sh->dev[i].flags);
clear_bit(R5_ReWrite, &sh->dev[i].flags);
}
@@ -1160,16 +1164,22 @@ static void raid5_end_read_request(struct bio * bi, int error)
clear_bit(R5_UPTODATE, &sh->dev[i].flags);
atomic_inc(&rdev->read_errors);
if (conf->mddev->degraded)
- printk(KERN_WARNING "raid5:%s: read error not correctable (sector %llu on %s).\n",
- mdname(conf->mddev),
- (unsigned long long)(sh->sector + rdev->data_offset),
- bdn);
+ printk_rl(KERN_WARNING
+ "raid5:%s: read error not correctable "
+ "(sector %llu on %s).\n",
+ mdname(conf->mddev),
+ (unsigned long long)(sh->sector
+ + rdev->data_offset),
+ bdn);
else if (test_bit(R5_ReWrite, &sh->dev[i].flags))
/* Oh, no!!! */
- printk(KERN_WARNING "raid5:%s: read error NOT corrected!! (sector %llu on %s).\n",
- mdname(conf->mddev),
- (unsigned long long)(sh->sector + rdev->data_offset),
- bdn);
+ printk_rl(KERN_WARNING
+ "raid5:%s: read error NOT corrected!! "
+ "(sector %llu on %s).\n",
+ mdname(conf->mddev),
+ (unsigned long long)(sh->sector
+ + rdev->data_offset),
+ bdn);
else if (atomic_read(&rdev->read_errors)
> conf->max_nr_stripes)
printk(KERN_WARNING
@@ -1258,7 +1268,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
/*
* if recovery was running, make sure it aborts.
*/
- set_bit(MD_RECOVERY_ERR, &mddev->recovery);
+ set_bit(MD_RECOVERY_INTR, &mddev->recovery);
}
set_bit(Faulty, &rdev->flags);
printk (KERN_ALERT
@@ -1992,6 +2002,7 @@ static int __handle_issuing_new_read_requests5(struct stripe_head *sh,
* have quiesced.
*/
if ((s->uptodate == disks - 1) &&
+ (s->failed && disk_idx == s->failed_num) &&
!test_bit(STRIPE_OP_CHECK, &sh->ops.pending)) {
set_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.pending);
set_bit(R5_Wantcompute, &dev->flags);
@@ -2006,12 +2017,7 @@ static int __handle_issuing_new_read_requests5(struct stripe_head *sh,
*/
s->uptodate++;
return 0; /* uptodate + compute == disks */
- } else if ((s->uptodate < disks - 1) &&
- test_bit(R5_Insync, &dev->flags)) {
- /* Note: we hold off compute operations while checks are
- * in flight, but we still prefer 'compute' over 'read'
- * hence we only read if (uptodate < * disks-1)
- */
+ } else if (test_bit(R5_Insync, &dev->flags)) {
set_bit(R5_LOCKED, &dev->flags);
set_bit(R5_Wantread, &dev->flags);
if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
@@ -2077,7 +2083,9 @@ static void handle_issuing_new_read_requests6(struct stripe_head *sh,
/* we would like to get this block, possibly
* by computing it, but we might not be able to
*/
- if (s->uptodate == disks-1) {
+ if ((s->uptodate == disks - 1) &&
+ (s->failed && (i == r6s->failed_num[0] ||
+ i == r6s->failed_num[1]))) {
pr_debug("Computing stripe %llu block %d\n",
(unsigned long long)sh->sector, i);
compute_block_1(sh, i, 0);
@@ -2369,8 +2377,8 @@ static void handle_parity_checks5(raid5_conf_t *conf, struct stripe_head *sh,
/* complete a check operation */
if (test_and_clear_bit(STRIPE_OP_CHECK, &sh->ops.complete)) {
- clear_bit(STRIPE_OP_CHECK, &sh->ops.ack);
- clear_bit(STRIPE_OP_CHECK, &sh->ops.pending);
+ clear_bit(STRIPE_OP_CHECK, &sh->ops.ack);
+ clear_bit(STRIPE_OP_CHECK, &sh->ops.pending);
if (s->failed == 0) {
if (sh->ops.zero_sum_result == 0)
/* parity is correct (on disc,
@@ -2400,16 +2408,6 @@ static void handle_parity_checks5(raid5_conf_t *conf, struct stripe_head *sh,
canceled_check = 1; /* STRIPE_INSYNC is not set */
}
- /* check if we can clear a parity disk reconstruct */
- if (test_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.complete) &&
- test_bit(STRIPE_OP_MOD_REPAIR_PD, &sh->ops.pending)) {
-
- clear_bit(STRIPE_OP_MOD_REPAIR_PD, &sh->ops.pending);
- clear_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.complete);
- clear_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.ack);
- clear_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.pending);
- }
-
/* start a new check operation if there are no failures, the stripe is
* not insync, and a repair is not in flight
*/
@@ -2424,6 +2422,17 @@ static void handle_parity_checks5(raid5_conf_t *conf, struct stripe_head *sh,
}
}
+ /* check if we can clear a parity disk reconstruct */
+ if (test_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.complete) &&
+ test_bit(STRIPE_OP_MOD_REPAIR_PD, &sh->ops.pending)) {
+
+ clear_bit(STRIPE_OP_MOD_REPAIR_PD, &sh->ops.pending);
+ clear_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.complete);
+ clear_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.ack);
+ clear_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.pending);
+ }
+
+
/* Wait for check parity and compute block operations to complete
* before write-back. If a failure occurred while the check operation
* was in flight we need to cycle this stripe through handle_stripe
@@ -2634,6 +2643,7 @@ static void handle_stripe5(struct stripe_head *sh)
struct r5dev *dev;
unsigned long pending = 0;
mdk_rdev_t *blocked_rdev = NULL;
+ int prexor;
memset(&s, 0, sizeof(s));
pr_debug("handling stripe %llu, state=%#lx cnt=%d, pd_idx=%d "
@@ -2763,9 +2773,11 @@ static void handle_stripe5(struct stripe_head *sh)
/* leave prexor set until postxor is done, allows us to distinguish
* a rmw from a rcw during biodrain
*/
+ prexor = 0;
if (test_bit(STRIPE_OP_PREXOR, &sh->ops.complete) &&
test_bit(STRIPE_OP_POSTXOR, &sh->ops.complete)) {
+ prexor = 1;
clear_bit(STRIPE_OP_PREXOR, &sh->ops.complete);
clear_bit(STRIPE_OP_PREXOR, &sh->ops.ack);
clear_bit(STRIPE_OP_PREXOR, &sh->ops.pending);
@@ -2799,6 +2811,8 @@ static void handle_stripe5(struct stripe_head *sh)
if (!test_and_set_bit(
STRIPE_OP_IO, &sh->ops.pending))
sh->ops.count++;
+ if (prexor)
+ continue;
if (!test_bit(R5_Insync, &dev->flags) ||
(i == sh->pd_idx && s.failed == 0))
set_bit(STRIPE_INSYNC, &sh->state);
@@ -2879,6 +2893,8 @@ static void handle_stripe5(struct stripe_head *sh)
for (i = conf->raid_disks; i--; ) {
set_bit(R5_Wantwrite, &sh->dev[i].flags);
+ set_bit(R5_LOCKED, &dev->flags);
+ s.locked++;
if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
sh->ops.count++;
}
@@ -2892,6 +2908,7 @@ static void handle_stripe5(struct stripe_head *sh)
conf->raid_disks);
s.locked += handle_write_operations5(sh, 1, 1);
} else if (s.expanded &&
+ s.locked == 0 &&
!test_bit(STRIPE_OP_POSTXOR, &sh->ops.pending)) {
clear_bit(STRIPE_EXPAND_READY, &sh->state);
atomic_dec(&conf->reshape_stripes);
@@ -4256,6 +4273,7 @@ static int run(mddev_t *mddev)
goto abort;
}
spin_lock_init(&conf->device_lock);
+ mddev->queue->queue_lock = &conf->device_lock;
init_waitqueue_head(&conf->wait_for_stripe);
init_waitqueue_head(&conf->wait_for_overlap);
INIT_LIST_HEAD(&conf->handle_list);
@@ -4285,7 +4303,9 @@ static int run(mddev_t *mddev)
" disk %d\n", bdevname(rdev->bdev,b),
raid_disk);
working_disks++;
- }
+ } else
+ /* Cannot rely on bitmap to complete recovery */
+ conf->fullsync = 1;
}
/*
@@ -4562,6 +4582,14 @@ static int raid5_remove_disk(mddev_t *mddev, int number)
err = -EBUSY;
goto abort;
}
+ /* Only remove non-faulty devices if recovery
+ * isn't possible.
+ */
+ if (!test_bit(Faulty, &rdev->flags) &&
+ mddev->degraded <= conf->max_degraded) {
+ err = -EBUSY;
+ goto abort;
+ }
p->rdev = NULL;
synchronize_rcu();
if (atomic_read(&rdev->nr_pending)) {
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