#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)));
return_bi = bi->bi_next;
bi->bi_next = NULL;
bi->bi_size = 0;
- bi->bi_end_io(bi,
- test_bit(BIO_UPTODATE, &bi->bi_flags)
- ? 0 : -EIO);
+ bio_endio(bi, 0);
bi = return_bi;
}
}
test_and_ack_op(STRIPE_OP_BIODRAIN, pending);
test_and_ack_op(STRIPE_OP_POSTXOR, pending);
test_and_ack_op(STRIPE_OP_CHECK, pending);
- if (test_and_clear_bit(STRIPE_OP_IO, &sh->ops.pending))
- ack++;
sh->ops.count -= ack;
if (unlikely(sh->ops.count < 0)) {
static void
raid5_end_write_request(struct bio *bi, int error);
-static void ops_run_io(struct stripe_head *sh)
+static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
{
raid5_conf_t *conf = sh->raid_conf;
int i, disks = sh->disks;
might_sleep();
- set_bit(STRIPE_IO_STARTED, &sh->state);
for (i = disks; i--; ) {
int rw;
struct bio *bi;
rcu_read_unlock();
if (rdev) {
- if (test_bit(STRIPE_SYNCING, &sh->state) ||
- test_bit(STRIPE_EXPAND_SOURCE, &sh->state) ||
- test_bit(STRIPE_EXPAND_READY, &sh->state))
+ if (s->syncing || s->expanding || s->expanded)
md_sync_acct(rdev->bdev, STRIPE_SECTORS);
+ set_bit(STRIPE_IO_STARTED, &sh->state);
+
bi->bi_bdev = rdev->bdev;
pr_debug("%s: for %llu schedule op %ld on disc %d\n",
__func__, (unsigned long long)sh->sector,
set_bit(R5_UPTODATE, &tgt->flags);
BUG_ON(!test_bit(R5_Wantcompute, &tgt->flags));
clear_bit(R5_Wantcompute, &tgt->flags);
- set_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.complete);
+ clear_bit(STRIPE_COMPUTE_RUN, &sh->state);
+ if (sh->check_state == check_state_compute_run)
+ sh->check_state = check_state_compute_result;
+ else
+ set_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.complete);
set_bit(STRIPE_HANDLE, &sh->state);
release_stripe(sh);
}
static void ops_complete_check(void *stripe_head_ref)
{
struct stripe_head *sh = stripe_head_ref;
- int pd_idx = sh->pd_idx;
pr_debug("%s: stripe %llu\n", __func__,
(unsigned long long)sh->sector);
- if (test_and_clear_bit(STRIPE_OP_MOD_DMA_CHECK, &sh->ops.pending) &&
- sh->ops.zero_sum_result == 0)
- set_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);
-
- set_bit(STRIPE_OP_CHECK, &sh->ops.complete);
+ sh->check_state = check_state_check_result;
set_bit(STRIPE_HANDLE, &sh->state);
release_stripe(sh);
}
tx = async_xor_zero_sum(xor_dest, xor_srcs, 0, count, STRIPE_SIZE,
&sh->ops.zero_sum_result, 0, NULL, NULL, NULL);
- if (tx)
- set_bit(STRIPE_OP_MOD_DMA_CHECK, &sh->ops.pending);
- else
- clear_bit(STRIPE_OP_MOD_DMA_CHECK, &sh->ops.pending);
-
atomic_inc(&sh->count);
tx = async_trigger_callback(ASYNC_TX_DEP_ACK | ASYNC_TX_ACK, tx,
ops_complete_check, sh);
}
-static void raid5_run_ops(struct stripe_head *sh, unsigned long pending)
+static void raid5_run_ops(struct stripe_head *sh, unsigned long pending,
+ unsigned long ops_request)
{
int overlap_clear = 0, i, disks = sh->disks;
struct dma_async_tx_descriptor *tx = NULL;
overlap_clear++;
}
- if (test_bit(STRIPE_OP_COMPUTE_BLK, &pending))
+ if (test_bit(STRIPE_OP_COMPUTE_BLK, &pending) ||
+ test_bit(STRIPE_OP_COMPUTE_BLK, &ops_request))
tx = ops_run_compute5(sh, pending);
if (test_bit(STRIPE_OP_PREXOR, &pending))
if (test_bit(STRIPE_OP_POSTXOR, &pending))
ops_run_postxor(sh, tx, pending);
- if (test_bit(STRIPE_OP_CHECK, &pending))
+ if (test_bit(STRIPE_OP_CHECK, &ops_request))
ops_run_check(sh);
- if (test_bit(STRIPE_OP_IO, &pending))
- ops_run_io(sh);
-
if (overlap_clear)
for (i = disks; i--; ) {
struct r5dev *dev = &sh->dev[i];
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);
}
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
/*
* 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
/* don't schedule compute operations or reads on the parity block while
* a check is in flight
*/
- if ((disk_idx == sh->pd_idx) &&
- test_bit(STRIPE_OP_CHECK, &sh->ops.pending))
+ if (disk_idx == sh->pd_idx && sh->check_state)
return ~0;
/* is the data in this block needed, and can we get it? */
* 3/ We hold off parity block re-reads until check operations
* have quiesced.
*/
- if ((s->uptodate == disks - 1) &&
- !test_bit(STRIPE_OP_CHECK, &sh->ops.pending)) {
+ if ((s->uptodate == disks - 1) && !sh->check_state &&
+ (s->failed && disk_idx == s->failed_num)) {
set_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.pending);
set_bit(R5_Wantcompute, &dev->flags);
sh->ops.target = disk_idx;
*/
set_bit(R5_LOCKED, &dev->flags);
set_bit(R5_Wantread, &dev->flags);
- if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
- sh->ops.count++;
s->locked++;
pr_debug("Reading block %d (sync=%d)\n", disk_idx,
s->syncing);
{
int i;
- /* Clear completed compute operations. Parity recovery
- * (STRIPE_OP_MOD_REPAIR_PD) implies a write-back which is handled
- * later on in this routine
- */
- if (test_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.complete) &&
- !test_bit(STRIPE_OP_MOD_REPAIR_PD, &sh->ops.pending)) {
+ /* Clear completed compute operations */
+ if (test_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.complete)) {
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);
/* 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);
"%d for r-m-w\n", i);
set_bit(R5_LOCKED, &dev->flags);
set_bit(R5_Wantread, &dev->flags);
- if (!test_and_set_bit(
- STRIPE_OP_IO, &sh->ops.pending))
- sh->ops.count++;
s->locked++;
} else {
set_bit(STRIPE_DELAYED, &sh->state);
"%d for Reconstruct\n", i);
set_bit(R5_LOCKED, &dev->flags);
set_bit(R5_Wantread, &dev->flags);
- if (!test_and_set_bit(
- STRIPE_OP_IO, &sh->ops.pending))
- sh->ops.count++;
s->locked++;
} else {
set_bit(STRIPE_DELAYED, &sh->state);
static void handle_parity_checks5(raid5_conf_t *conf, struct stripe_head *sh,
struct stripe_head_state *s, int disks)
{
- int canceled_check = 0;
+ struct r5dev *dev = NULL;
set_bit(STRIPE_HANDLE, &sh->state);
- /* 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);
+ switch (sh->check_state) {
+ case check_state_idle:
+ /* start a new check operation if there are no failures */
if (s->failed == 0) {
- if (sh->ops.zero_sum_result == 0)
- /* parity is correct (on disc,
- * not in buffer any more)
- */
- set_bit(STRIPE_INSYNC, &sh->state);
- else {
- conf->mddev->resync_mismatches +=
- STRIPE_SECTORS;
- if (test_bit(
- MD_RECOVERY_CHECK, &conf->mddev->recovery))
- /* don't try to repair!! */
- set_bit(STRIPE_INSYNC, &sh->state);
- else {
- set_bit(STRIPE_OP_COMPUTE_BLK,
- &sh->ops.pending);
- set_bit(STRIPE_OP_MOD_REPAIR_PD,
- &sh->ops.pending);
- set_bit(R5_Wantcompute,
- &sh->dev[sh->pd_idx].flags);
- sh->ops.target = sh->pd_idx;
- sh->ops.count++;
- s->uptodate++;
- }
- }
- } else
- canceled_check = 1; /* STRIPE_INSYNC is not set */
- }
-
- /* start a new check operation if there are no failures, the stripe is
- * not insync, and a repair is not in flight
- */
- if (s->failed == 0 &&
- !test_bit(STRIPE_INSYNC, &sh->state) &&
- !test_bit(STRIPE_OP_MOD_REPAIR_PD, &sh->ops.pending)) {
- if (!test_and_set_bit(STRIPE_OP_CHECK, &sh->ops.pending)) {
BUG_ON(s->uptodate != disks);
+ sh->check_state = check_state_run;
+ set_bit(STRIPE_OP_CHECK, &s->ops_request);
clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);
- sh->ops.count++;
s->uptodate--;
+ break;
}
- }
-
- /* 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);
- }
-
+ dev = &sh->dev[s->failed_num];
+ /* fall through */
+ case check_state_compute_result:
+ sh->check_state = check_state_idle;
+ if (!dev)
+ dev = &sh->dev[sh->pd_idx];
+
+ /* check that a write has not made the stripe insync */
+ if (test_bit(STRIPE_INSYNC, &sh->state))
+ break;
- /* 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
- * since the parity block may not be uptodate
- */
- if (!canceled_check && !test_bit(STRIPE_INSYNC, &sh->state) &&
- !test_bit(STRIPE_OP_CHECK, &sh->ops.pending) &&
- !test_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.pending)) {
- struct r5dev *dev;
/* either failed parity check, or recovery is happening */
- if (s->failed == 0)
- s->failed_num = sh->pd_idx;
- dev = &sh->dev[s->failed_num];
BUG_ON(!test_bit(R5_UPTODATE, &dev->flags));
BUG_ON(s->uptodate != disks);
set_bit(R5_LOCKED, &dev->flags);
+ s->locked++;
set_bit(R5_Wantwrite, &dev->flags);
- if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
- sh->ops.count++;
clear_bit(STRIPE_DEGRADED, &sh->state);
- s->locked++;
set_bit(STRIPE_INSYNC, &sh->state);
+ break;
+ case check_state_run:
+ break; /* we will be called again upon completion */
+ case check_state_check_result:
+ sh->check_state = check_state_idle;
+
+ /* if a failure occurred during the check operation, leave
+ * STRIPE_INSYNC not set and let the stripe be handled again
+ */
+ if (s->failed)
+ break;
+
+ /* handle a successful check operation, if parity is correct
+ * we are done. Otherwise update the mismatch count and repair
+ * parity if !MD_RECOVERY_CHECK
+ */
+ if (sh->ops.zero_sum_result == 0)
+ /* parity is correct (on disc,
+ * not in buffer any more)
+ */
+ set_bit(STRIPE_INSYNC, &sh->state);
+ else {
+ conf->mddev->resync_mismatches += STRIPE_SECTORS;
+ if (test_bit(MD_RECOVERY_CHECK, &conf->mddev->recovery))
+ /* don't try to repair!! */
+ set_bit(STRIPE_INSYNC, &sh->state);
+ else {
+ sh->check_state = check_state_compute_run;
+ set_bit(STRIPE_OP_COMPUTE_BLK, &s->ops_request);
+ set_bit(R5_Wantcompute,
+ &sh->dev[sh->pd_idx].flags);
+ sh->ops.target = sh->pd_idx;
+ s->uptodate++;
+ }
+ }
+ break;
+ case check_state_compute_run:
+ break;
+ default:
+ printk(KERN_ERR "%s: unknown check_state: %d sector: %llu\n",
+ __func__, sh->check_state,
+ (unsigned long long) sh->sector);
+ BUG();
}
}
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 "
/* 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);
(i == sh->pd_idx || dev->written)) {
pr_debug("Writing block %d\n", i);
set_bit(R5_Wantwrite, &dev->flags);
- 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);
* block.
*/
if (s.to_write && !test_bit(STRIPE_OP_POSTXOR, &sh->ops.pending) &&
- !test_bit(STRIPE_OP_CHECK, &sh->ops.pending))
+ !sh->check_state)
handle_issuing_new_write_requests5(conf, sh, &s, disks);
/* maybe we need to check and possibly fix the parity for this stripe
* data is available. The parity check is held off while parity
* dependent operations are in flight.
*/
- if ((s.syncing && s.locked == 0 &&
+ if (sh->check_state ||
+ (s.syncing && s.locked == 0 &&
!test_bit(STRIPE_OP_COMPUTE_BLK, &sh->ops.pending) &&
- !test_bit(STRIPE_INSYNC, &sh->state)) ||
- test_bit(STRIPE_OP_CHECK, &sh->ops.pending) ||
- test_bit(STRIPE_OP_MOD_REPAIR_PD, &sh->ops.pending))
+ !test_bit(STRIPE_INSYNC, &sh->state)))
handle_parity_checks5(conf, sh, &s, disks);
if (s.syncing && s.locked == 0 && test_bit(STRIPE_INSYNC, &sh->state)) {
dev = &sh->dev[s.failed_num];
if (!test_bit(R5_ReWrite, &dev->flags)) {
set_bit(R5_Wantwrite, &dev->flags);
- if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
- sh->ops.count++;
set_bit(R5_ReWrite, &dev->flags);
set_bit(R5_LOCKED, &dev->flags);
s.locked++;
} else {
/* let's read it back */
set_bit(R5_Wantread, &dev->flags);
- if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
- sh->ops.count++;
set_bit(R5_LOCKED, &dev->flags);
s.locked++;
}
clear_bit(STRIPE_OP_POSTXOR, &sh->ops.ack);
clear_bit(STRIPE_OP_POSTXOR, &sh->ops.complete);
- for (i = conf->raid_disks; i--; ) {
+ for (i = conf->raid_disks; i--; )
set_bit(R5_Wantwrite, &sh->dev[i].flags);
- if (!test_and_set_bit(STRIPE_OP_IO, &sh->ops.pending))
- sh->ops.count++;
- }
+ set_bit(R5_LOCKED, &dev->flags);
+ s.locked++;
}
if (s.expanded && test_bit(STRIPE_EXPANDING, &sh->state) &&
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);
if (unlikely(blocked_rdev))
md_wait_for_blocked_rdev(blocked_rdev, conf->mddev);
- if (pending)
- raid5_run_ops(sh, pending);
+ if (pending || s.ops_request)
+ raid5_run_ops(sh, pending, s.ops_request);
- return_io(return_bi);
+ ops_run_io(sh, &s);
+ return_io(return_bi);
}
static void handle_stripe6(struct stripe_head *sh, struct page *tmp_page)
if (unlikely(blocked_rdev))
md_wait_for_blocked_rdev(blocked_rdev, conf->mddev);
- return_io(return_bi);
-
- for (i=disks; i-- ;) {
- int rw;
- struct bio *bi;
- mdk_rdev_t *rdev;
- if (test_and_clear_bit(R5_Wantwrite, &sh->dev[i].flags))
- rw = WRITE;
- else if (test_and_clear_bit(R5_Wantread, &sh->dev[i].flags))
- rw = READ;
- else
- continue;
-
- set_bit(STRIPE_IO_STARTED, &sh->state);
+ ops_run_io(sh, &s);
- bi = &sh->dev[i].req;
-
- bi->bi_rw = rw;
- if (rw == WRITE)
- bi->bi_end_io = raid5_end_write_request;
- else
- bi->bi_end_io = raid5_end_read_request;
-
- rcu_read_lock();
- rdev = rcu_dereference(conf->disks[i].rdev);
- if (rdev && test_bit(Faulty, &rdev->flags))
- rdev = NULL;
- if (rdev)
- atomic_inc(&rdev->nr_pending);
- rcu_read_unlock();
-
- if (rdev) {
- if (s.syncing || s.expanding || s.expanded)
- md_sync_acct(rdev->bdev, STRIPE_SECTORS);
-
- bi->bi_bdev = rdev->bdev;
- pr_debug("for %llu schedule op %ld on disc %d\n",
- (unsigned long long)sh->sector, bi->bi_rw, i);
- atomic_inc(&sh->count);
- bi->bi_sector = sh->sector + rdev->data_offset;
- bi->bi_flags = 1 << BIO_UPTODATE;
- bi->bi_vcnt = 1;
- bi->bi_max_vecs = 1;
- bi->bi_idx = 0;
- bi->bi_io_vec = &sh->dev[i].vec;
- bi->bi_io_vec[0].bv_len = STRIPE_SIZE;
- bi->bi_io_vec[0].bv_offset = 0;
- bi->bi_size = STRIPE_SIZE;
- bi->bi_next = NULL;
- if (rw == WRITE &&
- test_bit(R5_ReWrite, &sh->dev[i].flags))
- atomic_add(STRIPE_SECTORS, &rdev->corrected_errors);
- generic_make_request(bi);
- } else {
- if (rw == WRITE)
- set_bit(STRIPE_DEGRADED, &sh->state);
- pr_debug("skip op %ld on disc %d for sector %llu\n",
- bi->bi_rw, i, (unsigned long long)sh->sector);
- clear_bit(R5_LOCKED, &sh->dev[i].flags);
- set_bit(STRIPE_HANDLE, &sh->state);
- }
- }
+ return_io(return_bi);
}
static void handle_stripe(struct stripe_head *sh, struct page *tmp_page)
if ( rw == WRITE )
md_write_end(mddev);
- bi->bi_end_io(bi,
- test_bit(BIO_UPTODATE, &bi->bi_flags)
- ? 0 : -EIO);
+ bio_endio(bi, 0);
}
return 0;
}
spin_lock_irq(&conf->device_lock);
remaining = --raid_bio->bi_phys_segments;
spin_unlock_irq(&conf->device_lock);
- if (remaining == 0) {
-
- raid_bio->bi_end_io(raid_bio,
- test_bit(BIO_UPTODATE, &raid_bio->bi_flags)
- ? 0 : -EIO);
- }
+ if (remaining == 0)
+ bio_endio(raid_bio, 0);
if (atomic_dec_and_test(&conf->active_aligned_reads))
wake_up(&conf->wait_for_stripe);
return handled;
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);
" disk %d\n", bdevname(rdev->bdev,b),
raid_disk);
working_disks++;
- }
+ } else
+ /* Cannot rely on bitmap to complete recovery */
+ conf->fullsync = 1;
}
/*
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)) {
static int raid5_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
{
raid5_conf_t *conf = mddev->private;
- int found = 0;
+ int err = -EEXIST;
int disk;
struct disk_info *p;
+ int first = 0;
+ int last = conf->raid_disks - 1;
if (mddev->degraded > conf->max_degraded)
/* no point adding a device */
- return 0;
+ return -EINVAL;
+
+ if (rdev->raid_disk >= 0)
+ first = last = rdev->raid_disk;
/*
* find the disk ... but prefer rdev->saved_raid_disk
* if possible.
*/
if (rdev->saved_raid_disk >= 0 &&
+ rdev->saved_raid_disk >= first &&
conf->disks[rdev->saved_raid_disk].rdev == NULL)
disk = rdev->saved_raid_disk;
else
- disk = 0;
- for ( ; disk < conf->raid_disks; disk++)
+ disk = first;
+ for ( ; disk <= last ; disk++)
if ((p=conf->disks + disk)->rdev == NULL) {
clear_bit(In_sync, &rdev->flags);
rdev->raid_disk = disk;
- found = 1;
+ err = 0;
if (rdev->saved_raid_disk != disk)
conf->fullsync = 1;
rcu_assign_pointer(p->rdev, rdev);
break;
}
print_raid5_conf(conf);
- return found;
+ return err;
}
static int raid5_resize(mddev_t *mddev, sector_t sectors)
rdev_for_each(rdev, rtmp, mddev)
if (rdev->raid_disk < 0 &&
!test_bit(Faulty, &rdev->flags)) {
- if (raid5_add_disk(mddev, rdev)) {
+ if (raid5_add_disk(mddev, rdev) == 0) {
char nm[20];
set_bit(In_sync, &rdev->flags);
added_devices++;
projects / linux-2.6-omap-h63xx.git / blobdiff