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path: root/drivers/md/raid1.c
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Diffstat (limited to 'drivers/md/raid1.c')
-rw-r--r--drivers/md/raid1.c86
1 files changed, 50 insertions, 36 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index dd25832eb045..4b30a1742162 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -304,8 +304,6 @@ static void call_bio_endio(struct r1bio *r1_bio)
if (!test_bit(R1BIO_Uptodate, &r1_bio->state))
bio->bi_status = BLK_STS_IOERR;
- if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
- bio_end_io_acct(bio, r1_bio->start_time);
bio_endio(bio);
}
@@ -313,6 +311,7 @@ static void raid_end_bio_io(struct r1bio *r1_bio)
{
struct bio *bio = r1_bio->master_bio;
struct r1conf *conf = r1_bio->mddev->private;
+ sector_t sector = r1_bio->sector;
/* if nobody has done the final endio yet, do it now */
if (!test_and_set_bit(R1BIO_Returned, &r1_bio->state)) {
@@ -323,13 +322,13 @@ static void raid_end_bio_io(struct r1bio *r1_bio)
call_bio_endio(r1_bio);
}
+
+ free_r1bio(r1_bio);
/*
* Wake up any possible resync thread that waits for the device
* to go idle. All I/Os, even write-behind writes, are done.
*/
- allow_barrier(conf, r1_bio->sector);
-
- free_r1bio(r1_bio);
+ allow_barrier(conf, sector);
}
/*
@@ -791,11 +790,17 @@ static int read_balance(struct r1conf *conf, struct r1bio *r1_bio, int *max_sect
return best_disk;
}
+static void wake_up_barrier(struct r1conf *conf)
+{
+ if (wq_has_sleeper(&conf->wait_barrier))
+ wake_up(&conf->wait_barrier);
+}
+
static void flush_bio_list(struct r1conf *conf, struct bio *bio)
{
/* flush any pending bitmap writes to disk before proceeding w/ I/O */
raid1_prepare_flush_writes(conf->mddev->bitmap);
- wake_up(&conf->wait_barrier);
+ wake_up_barrier(conf);
while (bio) { /* submit pending writes */
struct bio *next = bio->bi_next;
@@ -972,7 +977,7 @@ static bool _wait_barrier(struct r1conf *conf, int idx, bool nowait)
* In case freeze_array() is waiting for
* get_unqueued_pending() == extra
*/
- wake_up(&conf->wait_barrier);
+ wake_up_barrier(conf);
/* Wait for the barrier in same barrier unit bucket to drop. */
/* Return false when nowait flag is set */
@@ -1015,7 +1020,7 @@ static bool wait_read_barrier(struct r1conf *conf, sector_t sector_nr, bool nowa
* In case freeze_array() is waiting for
* get_unqueued_pending() == extra
*/
- wake_up(&conf->wait_barrier);
+ wake_up_barrier(conf);
/* Wait for array to be unfrozen */
/* Return false when nowait flag is set */
@@ -1044,7 +1049,7 @@ static bool wait_barrier(struct r1conf *conf, sector_t sector_nr, bool nowait)
static void _allow_barrier(struct r1conf *conf, int idx)
{
atomic_dec(&conf->nr_pending[idx]);
- wake_up(&conf->wait_barrier);
+ wake_up_barrier(conf);
}
static void allow_barrier(struct r1conf *conf, sector_t sector_nr)
@@ -1173,7 +1178,7 @@ static void raid1_unplug(struct blk_plug_cb *cb, bool from_schedule)
spin_lock_irq(&conf->device_lock);
bio_list_merge(&conf->pending_bio_list, &plug->pending);
spin_unlock_irq(&conf->device_lock);
- wake_up(&conf->wait_barrier);
+ wake_up_barrier(conf);
md_wakeup_thread(mddev->thread);
kfree(plug);
return;
@@ -1303,10 +1308,10 @@ static void raid1_read_request(struct mddev *mddev, struct bio *bio,
}
r1_bio->read_disk = rdisk;
-
- if (!r1bio_existed && blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
- r1_bio->start_time = bio_start_io_acct(bio);
-
+ if (!r1bio_existed) {
+ md_account_bio(mddev, &bio);
+ r1_bio->master_bio = bio;
+ }
read_bio = bio_alloc_clone(mirror->rdev->bdev, bio, gfp,
&mddev->bio_set);
@@ -1373,6 +1378,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
return;
}
+ retry_write:
r1_bio = alloc_r1bio(mddev, bio);
r1_bio->sectors = max_write_sectors;
@@ -1388,7 +1394,6 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
*/
disks = conf->raid_disks * 2;
- retry_write:
blocked_rdev = NULL;
rcu_read_lock();
max_sectors = r1_bio->sectors;
@@ -1468,7 +1473,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
for (j = 0; j < i; j++)
if (r1_bio->bios[j])
rdev_dec_pending(conf->mirrors[j].rdev, mddev);
- r1_bio->state = 0;
+ free_r1bio(r1_bio);
allow_barrier(conf, bio->bi_iter.bi_sector);
if (bio->bi_opf & REQ_NOWAIT) {
@@ -1500,8 +1505,8 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
r1_bio->sectors = max_sectors;
}
- if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue))
- r1_bio->start_time = bio_start_io_acct(bio);
+ md_account_bio(mddev, &bio);
+ r1_bio->master_bio = bio;
atomic_set(&r1_bio->remaining, 1);
atomic_set(&r1_bio->behind_remaining, 0);
@@ -1518,8 +1523,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
* Not if there are too many, or cannot
* allocate memory, or a reader on WriteMostly
* is waiting for behind writes to flush */
- if (bitmap &&
- test_bit(WriteMostly, &rdev->flags) &&
+ if (bitmap && write_behind &&
(atomic_read(&bitmap->behind_writes)
< mddev->bitmap_info.max_write_behind) &&
!waitqueue_active(&bitmap->behind_wait)) {
@@ -1576,7 +1580,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
r1_bio_write_done(r1_bio);
/* In case raid1d snuck in to freeze_array */
- wake_up(&conf->wait_barrier);
+ wake_up_barrier(conf);
}
static bool raid1_make_request(struct mddev *mddev, struct bio *bio)
@@ -1766,7 +1770,7 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev)
{
struct r1conf *conf = mddev->private;
int err = -EEXIST;
- int mirror = 0;
+ int mirror = 0, repl_slot = -1;
struct raid1_info *p;
int first = 0;
int last = conf->raid_disks - 1;
@@ -1809,17 +1813,21 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev)
break;
}
if (test_bit(WantReplacement, &p->rdev->flags) &&
- p[conf->raid_disks].rdev == NULL) {
- /* Add this device as a replacement */
- clear_bit(In_sync, &rdev->flags);
- set_bit(Replacement, &rdev->flags);
- rdev->raid_disk = mirror;
- err = 0;
- conf->fullsync = 1;
- rcu_assign_pointer(p[conf->raid_disks].rdev, rdev);
- break;
- }
+ p[conf->raid_disks].rdev == NULL && repl_slot < 0)
+ repl_slot = mirror;
}
+
+ if (err && repl_slot >= 0) {
+ /* Add this device as a replacement */
+ p = conf->mirrors + repl_slot;
+ clear_bit(In_sync, &rdev->flags);
+ set_bit(Replacement, &rdev->flags);
+ rdev->raid_disk = repl_slot;
+ err = 0;
+ conf->fullsync = 1;
+ rcu_assign_pointer(p[conf->raid_disks].rdev, rdev);
+ }
+
print_conf(conf);
return err;
}
@@ -1829,6 +1837,10 @@ static int raid1_remove_disk(struct mddev *mddev, struct md_rdev *rdev)
struct r1conf *conf = mddev->private;
int err = 0;
int number = rdev->raid_disk;
+
+ if (unlikely(number >= conf->raid_disks))
+ goto abort;
+
struct raid1_info *p = conf->mirrors + number;
if (rdev != p->rdev)
@@ -2299,7 +2311,7 @@ static void fix_read_error(struct r1conf *conf, int read_disk,
d++;
if (d == conf->raid_disks * 2)
d = 0;
- } while (!success && d != read_disk);
+ } while (d != read_disk);
if (!success) {
/* Cannot read from anywhere - mark it bad */
@@ -2498,6 +2510,7 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
struct mddev *mddev = conf->mddev;
struct bio *bio;
struct md_rdev *rdev;
+ sector_t sector;
clear_bit(R1BIO_ReadError, &r1_bio->state);
/* we got a read error. Maybe the drive is bad. Maybe just
@@ -2527,12 +2540,13 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
}
rdev_dec_pending(rdev, conf->mddev);
- allow_barrier(conf, r1_bio->sector);
+ sector = r1_bio->sector;
bio = r1_bio->master_bio;
/* Reuse the old r1_bio so that the IO_BLOCKED settings are preserved */
r1_bio->state = 0;
raid1_read_request(mddev, bio, r1_bio->sectors, r1_bio);
+ allow_barrier(conf, sector);
}
static void raid1d(struct md_thread *thread)
@@ -3144,7 +3158,7 @@ static int raid1_run(struct mddev *mddev)
* RAID1 needs at least one disk in active
*/
if (conf->raid_disks - mddev->degraded < 1) {
- md_unregister_thread(&conf->thread);
+ md_unregister_thread(mddev, &conf->thread);
ret = -EINVAL;
goto abort;
}
@@ -3171,7 +3185,7 @@ static int raid1_run(struct mddev *mddev)
ret = md_integrity_register(mddev);
if (ret) {
- md_unregister_thread(&mddev->thread);
+ md_unregister_thread(mddev, &mddev->thread);
goto abort;
}
return 0;
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-19 15:15:53 +0000