#include "raid1.h"
#include "bitmap.h"
-#define DEBUG 0
-#define PRINTK(x...) do { if (DEBUG) printk(x); } while (0)
-
/*
* Number of guaranteed r1bios in case of extreme VM load:
*/
#define NR_RAID1_BIOS 256
+/* When there are this many requests queue to be written by
+ * the raid1 thread, we become 'congested' to provide back-pressure
+ * for writeback.
+ */
+static int max_queued_requests = 1024;
-static void allow_barrier(conf_t *conf);
-static void lower_barrier(conf_t *conf);
+static void allow_barrier(struct r1conf *conf);
+static void lower_barrier(struct r1conf *conf);
static void * r1bio_pool_alloc(gfp_t gfp_flags, void *data)
{
struct pool_info *pi = data;
- int size = offsetof(r1bio_t, bios[pi->raid_disks]);
+ int size = offsetof(struct r1bio, bios[pi->raid_disks]);
/* allocate a r1bio with room for raid_disks entries in the bios array */
return kzalloc(size, gfp_flags);
{
struct pool_info *pi = data;
struct page *page;
- r1bio_t *r1_bio;
+ struct r1bio *r1_bio;
struct bio *bio;
int i, j;
{
struct pool_info *pi = data;
int i,j;
- r1bio_t *r1bio = __r1_bio;
+ struct r1bio *r1bio = __r1_bio;
for (i = 0; i < RESYNC_PAGES; i++)
for (j = pi->raid_disks; j-- ;) {
r1bio_pool_free(r1bio, data);
}
-static void put_all_bios(conf_t *conf, r1bio_t *r1_bio)
+static void put_all_bios(struct r1conf *conf, struct r1bio *r1_bio)
{
int i;
}
}
-static void free_r1bio(r1bio_t *r1_bio)
+static void free_r1bio(struct r1bio *r1_bio)
{
- conf_t *conf = r1_bio->mddev->private;
+ struct r1conf *conf = r1_bio->mddev->private;
put_all_bios(conf, r1_bio);
mempool_free(r1_bio, conf->r1bio_pool);
}
-static void put_buf(r1bio_t *r1_bio)
+static void put_buf(struct r1bio *r1_bio)
{
- conf_t *conf = r1_bio->mddev->private;
+ struct r1conf *conf = r1_bio->mddev->private;
int i;
for (i=0; i<conf->raid_disks; i++) {
lower_barrier(conf);
}
-static void reschedule_retry(r1bio_t *r1_bio)
+static void reschedule_retry(struct r1bio *r1_bio)
{
unsigned long flags;
- mddev_t *mddev = r1_bio->mddev;
- conf_t *conf = mddev->private;
+ struct mddev *mddev = r1_bio->mddev;
+ struct r1conf *conf = mddev->private;
spin_lock_irqsave(&conf->device_lock, flags);
list_add(&r1_bio->retry_list, &conf->retry_list);
* operation and are ready to return a success/failure code to the buffer
* cache layer.
*/
-static void call_bio_endio(r1bio_t *r1_bio)
+static void call_bio_endio(struct r1bio *r1_bio)
{
struct bio *bio = r1_bio->master_bio;
int done;
- conf_t *conf = r1_bio->mddev->private;
+ struct r1conf *conf = r1_bio->mddev->private;
if (bio->bi_phys_segments) {
unsigned long flags;
}
}
-static void raid_end_bio_io(r1bio_t *r1_bio)
+static void raid_end_bio_io(struct r1bio *r1_bio)
{
struct bio *bio = r1_bio->master_bio;
/* if nobody has done the final endio yet, do it now */
if (!test_and_set_bit(R1BIO_Returned, &r1_bio->state)) {
- PRINTK(KERN_DEBUG "raid1: sync end %s on sectors %llu-%llu\n",
- (bio_data_dir(bio) == WRITE) ? "write" : "read",
- (unsigned long long) bio->bi_sector,
- (unsigned long long) bio->bi_sector +
- (bio->bi_size >> 9) - 1);
+ pr_debug("raid1: sync end %s on sectors %llu-%llu\n",
+ (bio_data_dir(bio) == WRITE) ? "write" : "read",
+ (unsigned long long) bio->bi_sector,
+ (unsigned long long) bio->bi_sector +
+ (bio->bi_size >> 9) - 1);
call_bio_endio(r1_bio);
}
/*
* Update disk head position estimator based on IRQ completion info.
*/
-static inline void update_head_pos(int disk, r1bio_t *r1_bio)
+static inline void update_head_pos(int disk, struct r1bio *r1_bio)
{
- conf_t *conf = r1_bio->mddev->private;
+ struct r1conf *conf = r1_bio->mddev->private;
conf->mirrors[disk].head_position =
r1_bio->sector + (r1_bio->sectors);
}
+/*
+ * Find the disk number which triggered given bio
+ */
+static int find_bio_disk(struct r1bio *r1_bio, struct bio *bio)
+{
+ int mirror;
+ int raid_disks = r1_bio->mddev->raid_disks;
+
+ for (mirror = 0; mirror < raid_disks; mirror++)
+ if (r1_bio->bios[mirror] == bio)
+ break;
+
+ BUG_ON(mirror == raid_disks);
+ update_head_pos(mirror, r1_bio);
+
+ return mirror;
+}
+
static void raid1_end_read_request(struct bio *bio, int error)
{
int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
- r1bio_t *r1_bio = bio->bi_private;
+ struct r1bio *r1_bio = bio->bi_private;
int mirror;
- conf_t *conf = r1_bio->mddev->private;
+ struct r1conf *conf = r1_bio->mddev->private;
mirror = r1_bio->read_disk;
/*
rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev);
}
-static void r1_bio_write_done(r1bio_t *r1_bio)
+static void close_write(struct r1bio *r1_bio)
{
- if (atomic_dec_and_test(&r1_bio->remaining))
- {
- /* it really is the end of this request */
- if (test_bit(R1BIO_BehindIO, &r1_bio->state)) {
- /* free extra copy of the data pages */
- int i = r1_bio->behind_page_count;
- while (i--)
- safe_put_page(r1_bio->behind_bvecs[i].bv_page);
- kfree(r1_bio->behind_bvecs);
- r1_bio->behind_bvecs = NULL;
- }
- /* clear the bitmap if all writes complete successfully */
- bitmap_endwrite(r1_bio->mddev->bitmap, r1_bio->sector,
- r1_bio->sectors,
- !test_bit(R1BIO_Degraded, &r1_bio->state),
- test_bit(R1BIO_BehindIO, &r1_bio->state));
- md_write_end(r1_bio->mddev);
+ /* it really is the end of this request */
+ if (test_bit(R1BIO_BehindIO, &r1_bio->state)) {
+ /* free extra copy of the data pages */
+ int i = r1_bio->behind_page_count;
+ while (i--)
+ safe_put_page(r1_bio->behind_bvecs[i].bv_page);
+ kfree(r1_bio->behind_bvecs);
+ r1_bio->behind_bvecs = NULL;
+ }
+ /* clear the bitmap if all writes complete successfully */
+ bitmap_endwrite(r1_bio->mddev->bitmap, r1_bio->sector,
+ r1_bio->sectors,
+ !test_bit(R1BIO_Degraded, &r1_bio->state),
+ test_bit(R1BIO_BehindIO, &r1_bio->state));
+ md_write_end(r1_bio->mddev);
+}
+
+static void r1_bio_write_done(struct r1bio *r1_bio)
+{
+ if (!atomic_dec_and_test(&r1_bio->remaining))
+ return;
+
+ if (test_bit(R1BIO_WriteError, &r1_bio->state))
+ reschedule_retry(r1_bio);
+ else {
+ close_write(r1_bio);
if (test_bit(R1BIO_MadeGood, &r1_bio->state))
reschedule_retry(r1_bio);
else
static void raid1_end_write_request(struct bio *bio, int error)
{
int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
- r1bio_t *r1_bio = bio->bi_private;
+ struct r1bio *r1_bio = bio->bi_private;
int mirror, behind = test_bit(R1BIO_BehindIO, &r1_bio->state);
- conf_t *conf = r1_bio->mddev->private;
+ struct r1conf *conf = r1_bio->mddev->private;
struct bio *to_put = NULL;
-
- for (mirror = 0; mirror < conf->raid_disks; mirror++)
- if (r1_bio->bios[mirror] == bio)
- break;
+ mirror = find_bio_disk(r1_bio, bio);
/*
* 'one mirror IO has finished' event handler:
*/
- r1_bio->bios[mirror] = NULL;
- to_put = bio;
if (!uptodate) {
- md_error(r1_bio->mddev, conf->mirrors[mirror].rdev);
- /* an I/O failed, we can't clear the bitmap */
- set_bit(R1BIO_Degraded, &r1_bio->state);
+ set_bit(WriteErrorSeen,
+ &conf->mirrors[mirror].rdev->flags);
+ set_bit(R1BIO_WriteError, &r1_bio->state);
} else {
/*
* Set R1BIO_Uptodate in our master bio, so that we
sector_t first_bad;
int bad_sectors;
+ r1_bio->bios[mirror] = NULL;
+ to_put = bio;
set_bit(R1BIO_Uptodate, &r1_bio->state);
/* Maybe we can clear some bad blocks. */
}
}
- update_head_pos(mirror, r1_bio);
-
if (behind) {
if (test_bit(WriteMostly, &conf->mirrors[mirror].rdev->flags))
atomic_dec(&r1_bio->behind_remaining);
/* Maybe we can return now */
if (!test_and_set_bit(R1BIO_Returned, &r1_bio->state)) {
struct bio *mbio = r1_bio->master_bio;
- PRINTK(KERN_DEBUG "raid1: behind end write sectors %llu-%llu\n",
- (unsigned long long) mbio->bi_sector,
- (unsigned long long) mbio->bi_sector +
- (mbio->bi_size >> 9) - 1);
+ pr_debug("raid1: behind end write sectors"
+ " %llu-%llu\n",
+ (unsigned long long) mbio->bi_sector,
+ (unsigned long long) mbio->bi_sector +
+ (mbio->bi_size >> 9) - 1);
call_bio_endio(r1_bio);
}
}
*
* The rdev for the device selected will have nr_pending incremented.
*/
-static int read_balance(conf_t *conf, r1bio_t *r1_bio, int *max_sectors)
+static int read_balance(struct r1conf *conf, struct r1bio *r1_bio, int *max_sectors)
{
const sector_t this_sector = r1_bio->sector;
int sectors;
int best_disk;
int i;
sector_t best_dist;
- mdk_rdev_t *rdev;
+ struct md_rdev *rdev;
int choose_first;
rcu_read_lock();
return best_disk;
}
-int md_raid1_congested(mddev_t *mddev, int bits)
+int md_raid1_congested(struct mddev *mddev, int bits)
{
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
int i, ret = 0;
+ if ((bits & (1 << BDI_async_congested)) &&
+ conf->pending_count >= max_queued_requests)
+ return 1;
+
rcu_read_lock();
for (i = 0; i < mddev->raid_disks; i++) {
- mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
+ struct md_rdev *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && !test_bit(Faulty, &rdev->flags)) {
struct request_queue *q = bdev_get_queue(rdev->bdev);
static int raid1_congested(void *data, int bits)
{
- mddev_t *mddev = data;
+ struct mddev *mddev = data;
return mddev_congested(mddev, bits) ||
md_raid1_congested(mddev, bits);
}
-static void flush_pending_writes(conf_t *conf)
+static void flush_pending_writes(struct r1conf *conf)
{
/* Any writes that have been queued but are awaiting
* bitmap updates get flushed here.
if (conf->pending_bio_list.head) {
struct bio *bio;
bio = bio_list_get(&conf->pending_bio_list);
+ conf->pending_count = 0;
spin_unlock_irq(&conf->device_lock);
/* flush any pending bitmap writes to
* disk before proceeding w/ I/O */
bitmap_unplug(conf->mddev->bitmap);
+ wake_up(&conf->wait_barrier);
while (bio) { /* submit pending writes */
struct bio *next = bio->bi_next;
*/
#define RESYNC_DEPTH 32
-static void raise_barrier(conf_t *conf)
+static void raise_barrier(struct r1conf *conf)
{
spin_lock_irq(&conf->resync_lock);
spin_unlock_irq(&conf->resync_lock);
}
-static void lower_barrier(conf_t *conf)
+static void lower_barrier(struct r1conf *conf)
{
unsigned long flags;
BUG_ON(conf->barrier <= 0);
wake_up(&conf->wait_barrier);
}
-static void wait_barrier(conf_t *conf)
+static void wait_barrier(struct r1conf *conf)
{
spin_lock_irq(&conf->resync_lock);
if (conf->barrier) {
spin_unlock_irq(&conf->resync_lock);
}
-static void allow_barrier(conf_t *conf)
+static void allow_barrier(struct r1conf *conf)
{
unsigned long flags;
spin_lock_irqsave(&conf->resync_lock, flags);
wake_up(&conf->wait_barrier);
}
-static void freeze_array(conf_t *conf)
+static void freeze_array(struct r1conf *conf)
{
/* stop syncio and normal IO and wait for everything to
* go quite.
flush_pending_writes(conf));
spin_unlock_irq(&conf->resync_lock);
}
-static void unfreeze_array(conf_t *conf)
+static void unfreeze_array(struct r1conf *conf)
{
/* reverse the effect of the freeze */
spin_lock_irq(&conf->resync_lock);
/* duplicate the data pages for behind I/O
*/
-static void alloc_behind_pages(struct bio *bio, r1bio_t *r1_bio)
+static void alloc_behind_pages(struct bio *bio, struct r1bio *r1_bio)
{
int i;
struct bio_vec *bvec;
if (bvecs[i].bv_page)
put_page(bvecs[i].bv_page);
kfree(bvecs);
- PRINTK("%dB behind alloc failed, doing sync I/O\n", bio->bi_size);
+ pr_debug("%dB behind alloc failed, doing sync I/O\n", bio->bi_size);
}
-static int make_request(mddev_t *mddev, struct bio * bio)
+static int make_request(struct mddev *mddev, struct bio * bio)
{
- conf_t *conf = mddev->private;
- mirror_info_t *mirror;
- r1bio_t *r1_bio;
+ struct r1conf *conf = mddev->private;
+ struct mirror_info *mirror;
+ struct r1bio *r1_bio;
struct bio *read_bio;
int i, disks;
struct bitmap *bitmap;
const int rw = bio_data_dir(bio);
const unsigned long do_sync = (bio->bi_rw & REQ_SYNC);
const unsigned long do_flush_fua = (bio->bi_rw & (REQ_FLUSH | REQ_FUA));
- mdk_rdev_t *blocked_rdev;
+ struct md_rdev *blocked_rdev;
int plugged;
int first_clone;
int sectors_handled;
/*
* WRITE:
*/
+ if (conf->pending_count >= max_queued_requests) {
+ md_wakeup_thread(mddev->thread);
+ wait_event(conf->wait_barrier,
+ conf->pending_count < max_queued_requests);
+ }
/* first select target devices under rcu_lock and
* inc refcount on their rdev. Record them by setting
* bios[x] to bio
rcu_read_lock();
max_sectors = r1_bio->sectors;
for (i = 0; i < disks; i++) {
- mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
+ struct md_rdev *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev && unlikely(test_bit(Blocked, &rdev->flags))) {
atomic_inc(&rdev->nr_pending);
blocked_rdev = rdev;
atomic_inc(&r1_bio->remaining);
spin_lock_irqsave(&conf->device_lock, flags);
bio_list_add(&conf->pending_bio_list, mbio);
+ conf->pending_count++;
spin_unlock_irqrestore(&conf->device_lock, flags);
}
- r1_bio_write_done(r1_bio);
-
- /* In case raid1d snuck in to freeze_array */
- wake_up(&conf->wait_barrier);
-
+ /* Mustn't call r1_bio_write_done before this next test,
+ * as it could result in the bio being freed.
+ */
if (sectors_handled < (bio->bi_size >> 9)) {
+ r1_bio_write_done(r1_bio);
/* We need another r1_bio. It has already been counted
* in bio->bi_phys_segments
*/
goto retry_write;
}
+ r1_bio_write_done(r1_bio);
+
+ /* In case raid1d snuck in to freeze_array */
+ wake_up(&conf->wait_barrier);
+
if (do_sync || !bitmap || !plugged)
md_wakeup_thread(mddev->thread);
return 0;
}
-static void status(struct seq_file *seq, mddev_t *mddev)
+static void status(struct seq_file *seq, struct mddev *mddev)
{
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
int i;
seq_printf(seq, " [%d/%d] [", conf->raid_disks,
conf->raid_disks - mddev->degraded);
rcu_read_lock();
for (i = 0; i < conf->raid_disks; i++) {
- mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
+ struct md_rdev *rdev = rcu_dereference(conf->mirrors[i].rdev);
seq_printf(seq, "%s",
rdev && test_bit(In_sync, &rdev->flags) ? "U" : "_");
}
}
-static void error(mddev_t *mddev, mdk_rdev_t *rdev)
+static void error(struct mddev *mddev, struct md_rdev *rdev)
{
char b[BDEVNAME_SIZE];
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
/*
* If it is not operational, then we have already marked it as dead
mdname(mddev), conf->raid_disks - mddev->degraded);
}
-static void print_conf(conf_t *conf)
+static void print_conf(struct r1conf *conf)
{
int i;
rcu_read_lock();
for (i = 0; i < conf->raid_disks; i++) {
char b[BDEVNAME_SIZE];
- mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev);
+ struct md_rdev *rdev = rcu_dereference(conf->mirrors[i].rdev);
if (rdev)
printk(KERN_DEBUG " disk %d, wo:%d, o:%d, dev:%s\n",
i, !test_bit(In_sync, &rdev->flags),
rcu_read_unlock();
}
-static void close_sync(conf_t *conf)
+static void close_sync(struct r1conf *conf)
{
wait_barrier(conf);
allow_barrier(conf);
conf->r1buf_pool = NULL;
}
-static int raid1_spare_active(mddev_t *mddev)
+static int raid1_spare_active(struct mddev *mddev)
{
int i;
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
int count = 0;
unsigned long flags;
* Called under mddev lock, so rcu protection not needed.
*/
for (i = 0; i < conf->raid_disks; i++) {
- mdk_rdev_t *rdev = conf->mirrors[i].rdev;
+ struct md_rdev *rdev = conf->mirrors[i].rdev;
if (rdev
&& !test_bit(Faulty, &rdev->flags)
&& !test_and_set_bit(In_sync, &rdev->flags)) {
}
-static int raid1_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
+static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev)
{
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
int err = -EEXIST;
int mirror = 0;
- mirror_info_t *p;
+ struct mirror_info *p;
int first = 0;
int last = mddev->raid_disks - 1;
return err;
}
-static int raid1_remove_disk(mddev_t *mddev, int number)
+static int raid1_remove_disk(struct mddev *mddev, int number)
{
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
int err = 0;
- mdk_rdev_t *rdev;
- mirror_info_t *p = conf->mirrors+ number;
+ struct md_rdev *rdev;
+ struct mirror_info *p = conf->mirrors+ number;
print_conf(conf);
rdev = p->rdev;
static void end_sync_read(struct bio *bio, int error)
{
- r1bio_t *r1_bio = bio->bi_private;
- int i;
+ struct r1bio *r1_bio = bio->bi_private;
+
+ update_head_pos(r1_bio->read_disk, r1_bio);
- for (i=r1_bio->mddev->raid_disks; i--; )
- if (r1_bio->bios[i] == bio)
- break;
- BUG_ON(i < 0);
- update_head_pos(i, r1_bio);
/*
* we have read a block, now it needs to be re-written,
* or re-read if the read failed.
static void end_sync_write(struct bio *bio, int error)
{
int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
- r1bio_t *r1_bio = bio->bi_private;
- mddev_t *mddev = r1_bio->mddev;
- conf_t *conf = mddev->private;
- int i;
+ struct r1bio *r1_bio = bio->bi_private;
+ struct mddev *mddev = r1_bio->mddev;
+ struct r1conf *conf = mddev->private;
int mirror=0;
sector_t first_bad;
int bad_sectors;
- for (i = 0; i < conf->raid_disks; i++)
- if (r1_bio->bios[i] == bio) {
- mirror = i;
- break;
- }
+ mirror = find_bio_disk(r1_bio, bio);
+
if (!uptodate) {
sector_t sync_blocks = 0;
sector_t s = r1_bio->sector;
s += sync_blocks;
sectors_to_go -= sync_blocks;
} while (sectors_to_go > 0);
- md_error(mddev, conf->mirrors[mirror].rdev);
+ set_bit(WriteErrorSeen,
+ &conf->mirrors[mirror].rdev->flags);
+ set_bit(R1BIO_WriteError, &r1_bio->state);
} else if (is_badblock(conf->mirrors[mirror].rdev,
r1_bio->sector,
r1_bio->sectors,
- &first_bad, &bad_sectors))
+ &first_bad, &bad_sectors) &&
+ !is_badblock(conf->mirrors[r1_bio->read_disk].rdev,
+ r1_bio->sector,
+ r1_bio->sectors,
+ &first_bad, &bad_sectors)
+ )
set_bit(R1BIO_MadeGood, &r1_bio->state);
- update_head_pos(mirror, r1_bio);
-
if (atomic_dec_and_test(&r1_bio->remaining)) {
int s = r1_bio->sectors;
- if (test_bit(R1BIO_MadeGood, &r1_bio->state))
+ if (test_bit(R1BIO_MadeGood, &r1_bio->state) ||
+ test_bit(R1BIO_WriteError, &r1_bio->state))
reschedule_retry(r1_bio);
else {
put_buf(r1_bio);
}
}
-static int fix_sync_read_error(r1bio_t *r1_bio)
+static int r1_sync_page_io(struct md_rdev *rdev, sector_t sector,
+ int sectors, struct page *page, int rw)
+{
+ if (sync_page_io(rdev, sector, sectors << 9, page, rw, false))
+ /* success */
+ return 1;
+ if (rw == WRITE)
+ set_bit(WriteErrorSeen, &rdev->flags);
+ /* need to record an error - either for the block or the device */
+ if (!rdev_set_badblocks(rdev, sector, sectors, 0))
+ md_error(rdev->mddev, rdev);
+ return 0;
+}
+
+static int fix_sync_read_error(struct r1bio *r1_bio)
{
/* Try some synchronous reads of other devices to get
* good data, much like with normal read errors. Only
* made sure that anything with a bad block in range
* will have bi_end_io clear.
*/
- mddev_t *mddev = r1_bio->mddev;
- conf_t *conf = mddev->private;
+ struct mddev *mddev = r1_bio->mddev;
+ struct r1conf *conf = mddev->private;
struct bio *bio = r1_bio->bios[r1_bio->read_disk];
sector_t sect = r1_bio->sector;
int sectors = r1_bio->sectors;
int s = sectors;
int d = r1_bio->read_disk;
int success = 0;
- mdk_rdev_t *rdev;
+ struct md_rdev *rdev;
int start;
if (s > (PAGE_SIZE>>9))
if (!success) {
char b[BDEVNAME_SIZE];
- /* Cannot read from anywhere, array is toast */
- md_error(mddev, conf->mirrors[r1_bio->read_disk].rdev);
+ int abort = 0;
+ /* Cannot read from anywhere, this block is lost.
+ * Record a bad block on each device. If that doesn't
+ * work just disable and interrupt the recovery.
+ * Don't fail devices as that won't really help.
+ */
printk(KERN_ALERT "md/raid1:%s: %s: unrecoverable I/O read error"
" for block %llu\n",
mdname(mddev),
bdevname(bio->bi_bdev, b),
(unsigned long long)r1_bio->sector);
- md_done_sync(mddev, r1_bio->sectors, 0);
- put_buf(r1_bio);
- return 0;
+ for (d = 0; d < conf->raid_disks; d++) {
+ rdev = conf->mirrors[d].rdev;
+ if (!rdev || test_bit(Faulty, &rdev->flags))
+ continue;
+ if (!rdev_set_badblocks(rdev, sect, s, 0))
+ abort = 1;
+ }
+ if (abort) {
+ conf->recovery_disabled =
+ mddev->recovery_disabled;
+ set_bit(MD_RECOVERY_INTR, &mddev->recovery);
+ md_done_sync(mddev, r1_bio->sectors, 0);
+ put_buf(r1_bio);
+ return 0;
+ }
+ /* Try next page */
+ sectors -= s;
+ sect += s;
+ idx++;
+ continue;
}
start = d;
if (r1_bio->bios[d]->bi_end_io != end_sync_read)
continue;
rdev = conf->mirrors[d].rdev;
- if (sync_page_io(rdev, sect, s<<9,
- bio->bi_io_vec[idx].bv_page,
- WRITE, false) == 0) {
+ if (r1_sync_page_io(rdev, sect, s,
+ bio->bi_io_vec[idx].bv_page,
+ WRITE) == 0) {
r1_bio->bios[d]->bi_end_io = NULL;
rdev_dec_pending(rdev, mddev);
- md_error(mddev, rdev);
}
}
d = start;
if (r1_bio->bios[d]->bi_end_io != end_sync_read)
continue;
rdev = conf->mirrors[d].rdev;
- if (sync_page_io(rdev, sect, s<<9,
- bio->bi_io_vec[idx].bv_page,
- READ, false) == 0)
- md_error(mddev, rdev);
- else
+ if (r1_sync_page_io(rdev, sect, s,
+ bio->bi_io_vec[idx].bv_page,
+ READ) != 0)
atomic_add(s, &rdev->corrected_errors);
}
sectors -= s;
return 1;
}
-static int process_checks(r1bio_t *r1_bio)
+static int process_checks(struct r1bio *r1_bio)
{
/* We have read all readable devices. If we haven't
* got the block, then there is no hope left.
* If any blocks failed to read, then we need to
* attempt an over-write
*/
- mddev_t *mddev = r1_bio->mddev;
- conf_t *conf = mddev->private;
+ struct mddev *mddev = r1_bio->mddev;
+ struct r1conf *conf = mddev->private;
int primary;
int i;
return 0;
}
-static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio)
+static void sync_request_write(struct mddev *mddev, struct r1bio *r1_bio)
{
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
int i;
int disks = conf->raid_disks;
struct bio *bio, *wbio;
* 3. Performs writes following reads for array synchronising.
*/
-static void fix_read_error(conf_t *conf, int read_disk,
+static void fix_read_error(struct r1conf *conf, int read_disk,
sector_t sect, int sectors)
{
- mddev_t *mddev = conf->mddev;
+ struct mddev *mddev = conf->mddev;
while(sectors) {
int s = sectors;
int d = read_disk;
int success = 0;
int start;
- mdk_rdev_t *rdev;
+ struct md_rdev *rdev;
if (s > (PAGE_SIZE>>9))
s = PAGE_SIZE >> 9;
} while (!success && d != read_disk);
if (!success) {
- /* Cannot read from anywhere -- bye bye array */
- md_error(mddev, conf->mirrors[read_disk].rdev);
+ /* Cannot read from anywhere - mark it bad */
+ struct md_rdev *rdev = conf->mirrors[read_disk].rdev;
+ if (!rdev_set_badblocks(rdev, sect, s, 0))
+ md_error(mddev, rdev);
break;
}
/* write it back and re-read */
d--;
rdev = conf->mirrors[d].rdev;
if (rdev &&
- test_bit(In_sync, &rdev->flags)) {
- if (sync_page_io(rdev, sect, s<<9,
- conf->tmppage, WRITE, false)
- == 0)
- /* Well, this device is dead */
- md_error(mddev, rdev);
- }
+ test_bit(In_sync, &rdev->flags))
+ r1_sync_page_io(rdev, sect, s,
+ conf->tmppage, WRITE);
}
d = start;
while (d != read_disk) {
rdev = conf->mirrors[d].rdev;
if (rdev &&
test_bit(In_sync, &rdev->flags)) {
- if (sync_page_io(rdev, sect, s<<9,
- conf->tmppage, READ, false)
- == 0)
- /* Well, this device is dead */
- md_error(mddev, rdev);
- else {
+ if (r1_sync_page_io(rdev, sect, s,
+ conf->tmppage, READ)) {
atomic_add(s, &rdev->corrected_errors);
printk(KERN_INFO
"md/raid1:%s: read error corrected "
}
}
-static void raid1d(mddev_t *mddev)
+static void bi_complete(struct bio *bio, int error)
{
- r1bio_t *r1_bio;
+ complete((struct completion *)bio->bi_private);
+}
+
+static int submit_bio_wait(int rw, struct bio *bio)
+{
+ struct completion event;
+ rw |= REQ_SYNC;
+
+ init_completion(&event);
+ bio->bi_private = &event;
+ bio->bi_end_io = bi_complete;
+ submit_bio(rw, bio);
+ wait_for_completion(&event);
+
+ return test_bit(BIO_UPTODATE, &bio->bi_flags);
+}
+
+static int narrow_write_error(struct r1bio *r1_bio, int i)
+{
+ struct mddev *mddev = r1_bio->mddev;
+ struct r1conf *conf = mddev->private;
+ struct md_rdev *rdev = conf->mirrors[i].rdev;
+ int vcnt, idx;
+ struct bio_vec *vec;
+
+ /* bio has the data to be written to device 'i' where
+ * we just recently had a write error.
+ * We repeatedly clone the bio and trim down to one block,
+ * then try the write. Where the write fails we record
+ * a bad block.
+ * It is conceivable that the bio doesn't exactly align with
+ * blocks. We must handle this somehow.
+ *
+ * We currently own a reference on the rdev.
+ */
+
+ int block_sectors;
+ sector_t sector;
+ int sectors;
+ int sect_to_write = r1_bio->sectors;
+ int ok = 1;
+
+ if (rdev->badblocks.shift < 0)
+ return 0;
+
+ block_sectors = 1 << rdev->badblocks.shift;
+ sector = r1_bio->sector;
+ sectors = ((sector + block_sectors)
+ & ~(sector_t)(block_sectors - 1))
+ - sector;
+
+ if (test_bit(R1BIO_BehindIO, &r1_bio->state)) {
+ vcnt = r1_bio->behind_page_count;
+ vec = r1_bio->behind_bvecs;
+ idx = 0;
+ while (vec[idx].bv_page == NULL)
+ idx++;
+ } else {
+ vcnt = r1_bio->master_bio->bi_vcnt;
+ vec = r1_bio->master_bio->bi_io_vec;
+ idx = r1_bio->master_bio->bi_idx;
+ }
+ while (sect_to_write) {
+ struct bio *wbio;
+ if (sectors > sect_to_write)
+ sectors = sect_to_write;
+ /* Write at 'sector' for 'sectors'*/
+
+ wbio = bio_alloc_mddev(GFP_NOIO, vcnt, mddev);
+ memcpy(wbio->bi_io_vec, vec, vcnt * sizeof(struct bio_vec));
+ wbio->bi_sector = r1_bio->sector;
+ wbio->bi_rw = WRITE;
+ wbio->bi_vcnt = vcnt;
+ wbio->bi_size = r1_bio->sectors << 9;
+ wbio->bi_idx = idx;
+
+ md_trim_bio(wbio, sector - r1_bio->sector, sectors);
+ wbio->bi_sector += rdev->data_offset;
+ wbio->bi_bdev = rdev->bdev;
+ if (submit_bio_wait(WRITE, wbio) == 0)
+ /* failure! */
+ ok = rdev_set_badblocks(rdev, sector,
+ sectors, 0)
+ && ok;
+
+ bio_put(wbio);
+ sect_to_write -= sectors;
+ sector += sectors;
+ sectors = block_sectors;
+ }
+ return ok;
+}
+
+static void handle_sync_write_finished(struct r1conf *conf, struct r1bio *r1_bio)
+{
+ int m;
+ int s = r1_bio->sectors;
+ for (m = 0; m < conf->raid_disks ; m++) {
+ struct md_rdev *rdev = conf->mirrors[m].rdev;
+ struct bio *bio = r1_bio->bios[m];
+ if (bio->bi_end_io == NULL)
+ continue;
+ if (test_bit(BIO_UPTODATE, &bio->bi_flags) &&
+ test_bit(R1BIO_MadeGood, &r1_bio->state)) {
+ rdev_clear_badblocks(rdev, r1_bio->sector, s);
+ }
+ if (!test_bit(BIO_UPTODATE, &bio->bi_flags) &&
+ test_bit(R1BIO_WriteError, &r1_bio->state)) {
+ if (!rdev_set_badblocks(rdev, r1_bio->sector, s, 0))
+ md_error(conf->mddev, rdev);
+ }
+ }
+ put_buf(r1_bio);
+ md_done_sync(conf->mddev, s, 1);
+}
+
+static void handle_write_finished(struct r1conf *conf, struct r1bio *r1_bio)
+{
+ int m;
+ for (m = 0; m < conf->raid_disks ; m++)
+ if (r1_bio->bios[m] == IO_MADE_GOOD) {
+ struct md_rdev *rdev = conf->mirrors[m].rdev;
+ rdev_clear_badblocks(rdev,
+ r1_bio->sector,
+ r1_bio->sectors);
+ rdev_dec_pending(rdev, conf->mddev);
+ } else if (r1_bio->bios[m] != NULL) {
+ /* This drive got a write error. We need to
+ * narrow down and record precise write
+ * errors.
+ */
+ if (!narrow_write_error(r1_bio, m)) {
+ md_error(conf->mddev,
+ conf->mirrors[m].rdev);
+ /* an I/O failed, we can't clear the bitmap */
+ set_bit(R1BIO_Degraded, &r1_bio->state);
+ }
+ rdev_dec_pending(conf->mirrors[m].rdev,
+ conf->mddev);
+ }
+ if (test_bit(R1BIO_WriteError, &r1_bio->state))
+ close_write(r1_bio);
+ raid_end_bio_io(r1_bio);
+}
+
+static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
+{
+ int disk;
+ int max_sectors;
+ struct mddev *mddev = conf->mddev;
struct bio *bio;
+ char b[BDEVNAME_SIZE];
+ struct md_rdev *rdev;
+
+ clear_bit(R1BIO_ReadError, &r1_bio->state);
+ /* we got a read error. Maybe the drive is bad. Maybe just
+ * the block and we can fix it.
+ * We freeze all other IO, and try reading the block from
+ * other devices. When we find one, we re-write
+ * and check it that fixes the read error.
+ * This is all done synchronously while the array is
+ * frozen
+ */
+ if (mddev->ro == 0) {
+ freeze_array(conf);
+ fix_read_error(conf, r1_bio->read_disk,
+ r1_bio->sector, r1_bio->sectors);
+ unfreeze_array(conf);
+ } else
+ md_error(mddev, conf->mirrors[r1_bio->read_disk].rdev);
+
+ bio = r1_bio->bios[r1_bio->read_disk];
+ bdevname(bio->bi_bdev, b);
+read_more:
+ disk = read_balance(conf, r1_bio, &max_sectors);
+ if (disk == -1) {
+ printk(KERN_ALERT "md/raid1:%s: %s: unrecoverable I/O"
+ " read error for block %llu\n",
+ mdname(mddev), b, (unsigned long long)r1_bio->sector);
+ raid_end_bio_io(r1_bio);
+ } else {
+ const unsigned long do_sync
+ = r1_bio->master_bio->bi_rw & REQ_SYNC;
+ if (bio) {
+ r1_bio->bios[r1_bio->read_disk] =
+ mddev->ro ? IO_BLOCKED : NULL;
+ bio_put(bio);
+ }
+ r1_bio->read_disk = disk;
+ bio = bio_clone_mddev(r1_bio->master_bio, GFP_NOIO, mddev);
+ md_trim_bio(bio, r1_bio->sector - bio->bi_sector, max_sectors);
+ r1_bio->bios[r1_bio->read_disk] = bio;
+ rdev = conf->mirrors[disk].rdev;
+ printk_ratelimited(KERN_ERR
+ "md/raid1:%s: redirecting sector %llu"
+ " to other mirror: %s\n",
+ mdname(mddev),
+ (unsigned long long)r1_bio->sector,
+ bdevname(rdev->bdev, b));
+ bio->bi_sector = r1_bio->sector + rdev->data_offset;
+ bio->bi_bdev = rdev->bdev;
+ bio->bi_end_io = raid1_end_read_request;
+ bio->bi_rw = READ | do_sync;
+ bio->bi_private = r1_bio;
+ if (max_sectors < r1_bio->sectors) {
+ /* Drat - have to split this up more */
+ struct bio *mbio = r1_bio->master_bio;
+ int sectors_handled = (r1_bio->sector + max_sectors
+ - mbio->bi_sector);
+ r1_bio->sectors = max_sectors;
+ spin_lock_irq(&conf->device_lock);
+ if (mbio->bi_phys_segments == 0)
+ mbio->bi_phys_segments = 2;
+ else
+ mbio->bi_phys_segments++;
+ spin_unlock_irq(&conf->device_lock);
+ generic_make_request(bio);
+ bio = NULL;
+
+ r1_bio = mempool_alloc(conf->r1bio_pool, GFP_NOIO);
+
+ r1_bio->master_bio = mbio;
+ r1_bio->sectors = (mbio->bi_size >> 9)
+ - sectors_handled;
+ r1_bio->state = 0;
+ set_bit(R1BIO_ReadError, &r1_bio->state);
+ r1_bio->mddev = mddev;
+ r1_bio->sector = mbio->bi_sector + sectors_handled;
+
+ goto read_more;
+ } else
+ generic_make_request(bio);
+ }
+}
+
+static void raid1d(struct mddev *mddev)
+{
+ struct r1bio *r1_bio;
unsigned long flags;
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
struct list_head *head = &conf->retry_list;
- mdk_rdev_t *rdev;
struct blk_plug plug;
md_check_recovery(mddev);
blk_start_plug(&plug);
for (;;) {
- char b[BDEVNAME_SIZE];
if (atomic_read(&mddev->plug_cnt) == 0)
flush_pending_writes(conf);
spin_unlock_irqrestore(&conf->device_lock, flags);
break;
}
- r1_bio = list_entry(head->prev, r1bio_t, retry_list);
+ r1_bio = list_entry(head->prev, struct r1bio, retry_list);
list_del(head->prev);
conf->nr_queued--;
spin_unlock_irqrestore(&conf->device_lock, flags);
mddev = r1_bio->mddev;
conf = mddev->private;
if (test_bit(R1BIO_IsSync, &r1_bio->state)) {
- if (test_bit(R1BIO_MadeGood, &r1_bio->state)) {
- int m;
- int s = r1_bio->sectors;
- for (m = 0; m < conf->raid_disks ; m++) {
- struct bio *bio = r1_bio->bios[m];
- if (bio->bi_end_io != NULL &&
- test_bit(BIO_UPTODATE,
- &bio->bi_flags)) {
- rdev = conf->mirrors[m].rdev;
- rdev_clear_badblocks(
- rdev,
- r1_bio->sector,
- r1_bio->sectors);
- }
- }
- put_buf(r1_bio);
- md_done_sync(mddev, s, 1);
- } else
+ if (test_bit(R1BIO_MadeGood, &r1_bio->state) ||
+ test_bit(R1BIO_WriteError, &r1_bio->state))
+ handle_sync_write_finished(conf, r1_bio);
+ else
sync_request_write(mddev, r1_bio);
- } else if (test_bit(R1BIO_MadeGood, &r1_bio->state)) {
- int m;
- for (m = 0; m < conf->raid_disks ; m++)
- if (r1_bio->bios[m] == IO_MADE_GOOD) {
- rdev = conf->mirrors[m].rdev;
- rdev_clear_badblocks(
- rdev,
- r1_bio->sector,
- r1_bio->sectors);
- rdev_dec_pending(rdev, mddev);
- }
- raid_end_bio_io(r1_bio);
- } else if (test_bit(R1BIO_ReadError, &r1_bio->state)) {
- int disk;
- int max_sectors;
-
- clear_bit(R1BIO_ReadError, &r1_bio->state);
- /* we got a read error. Maybe the drive is bad. Maybe just
- * the block and we can fix it.
- * We freeze all other IO, and try reading the block from
- * other devices. When we find one, we re-write
- * and check it that fixes the read error.
- * This is all done synchronously while the array is
- * frozen
- */
- if (mddev->ro == 0) {
- freeze_array(conf);
- fix_read_error(conf, r1_bio->read_disk,
- r1_bio->sector,
- r1_bio->sectors);
- unfreeze_array(conf);
- } else
- md_error(mddev,
- conf->mirrors[r1_bio->read_disk].rdev);
-
- bio = r1_bio->bios[r1_bio->read_disk];
- bdevname(bio->bi_bdev, b);
-read_more:
- disk = read_balance(conf, r1_bio, &max_sectors);
- if (disk == -1) {
- printk(KERN_ALERT "md/raid1:%s: %s: unrecoverable I/O"
- " read error for block %llu\n",
- mdname(mddev), b,
- (unsigned long long)r1_bio->sector);
- raid_end_bio_io(r1_bio);
- } else {
- const unsigned long do_sync = r1_bio->master_bio->bi_rw & REQ_SYNC;
- if (bio) {
- r1_bio->bios[r1_bio->read_disk] =
- mddev->ro ? IO_BLOCKED : NULL;
- bio_put(bio);
- }
- r1_bio->read_disk = disk;
- bio = bio_clone_mddev(r1_bio->master_bio,
- GFP_NOIO, mddev);
- md_trim_bio(bio,
- r1_bio->sector - bio->bi_sector,
- max_sectors);
- r1_bio->bios[r1_bio->read_disk] = bio;
- rdev = conf->mirrors[disk].rdev;
- printk_ratelimited(
- KERN_ERR
- "md/raid1:%s: redirecting sector %llu"
- " to other mirror: %s\n",
- mdname(mddev),
- (unsigned long long)r1_bio->sector,
- bdevname(rdev->bdev, b));
- bio->bi_sector = r1_bio->sector + rdev->data_offset;
- bio->bi_bdev = rdev->bdev;
- bio->bi_end_io = raid1_end_read_request;
- bio->bi_rw = READ | do_sync;
- bio->bi_private = r1_bio;
- if (max_sectors < r1_bio->sectors) {
- /* Drat - have to split this up more */
- struct bio *mbio = r1_bio->master_bio;
- int sectors_handled =
- r1_bio->sector + max_sectors
- - mbio->bi_sector;
- r1_bio->sectors = max_sectors;
- spin_lock_irq(&conf->device_lock);
- if (mbio->bi_phys_segments == 0)
- mbio->bi_phys_segments = 2;
- else
- mbio->bi_phys_segments++;
- spin_unlock_irq(&conf->device_lock);
- generic_make_request(bio);
- bio = NULL;
-
- r1_bio = mempool_alloc(conf->r1bio_pool,
- GFP_NOIO);
-
- r1_bio->master_bio = mbio;
- r1_bio->sectors = (mbio->bi_size >> 9)
- - sectors_handled;
- r1_bio->state = 0;
- set_bit(R1BIO_ReadError,
- &r1_bio->state);
- r1_bio->mddev = mddev;
- r1_bio->sector = mbio->bi_sector
- + sectors_handled;
-
- goto read_more;
- } else
- generic_make_request(bio);
- }
- } else {
+ } else if (test_bit(R1BIO_MadeGood, &r1_bio->state) ||
+ test_bit(R1BIO_WriteError, &r1_bio->state))
+ handle_write_finished(conf, r1_bio);
+ else if (test_bit(R1BIO_ReadError, &r1_bio->state))
+ handle_read_error(conf, r1_bio);
+ else
/* just a partial read to be scheduled from separate
* context
*/
generic_make_request(r1_bio->bios[r1_bio->read_disk]);
- }
+
cond_resched();
if (mddev->flags & ~(1<<MD_CHANGE_PENDING))
md_check_recovery(mddev);
}
-static int init_resync(conf_t *conf)
+static int init_resync(struct r1conf *conf)
{
int buffs;
* that can be installed to exclude normal IO requests.
*/
-static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster)
+static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipped, int go_faster)
{
- conf_t *conf = mddev->private;
- r1bio_t *r1_bio;
+ struct r1conf *conf = mddev->private;
+ struct r1bio *r1_bio;
struct bio *bio;
sector_t max_sector, nr_sectors;
int disk = -1;
set_bit(R1BIO_IsSync, &r1_bio->state);
for (i=0; i < conf->raid_disks; i++) {
- mdk_rdev_t *rdev;
+ struct md_rdev *rdev;
bio = r1_bio->bios[i];
/* take from bio_init */
int ok = 1;
for (i = 0 ; i < conf->raid_disks ; i++)
if (r1_bio->bios[i]->bi_end_io == end_sync_write) {
- mdk_rdev_t *rdev =
+ struct md_rdev *rdev =
rcu_dereference(conf->mirrors[i].rdev);
ok = rdev_set_badblocks(rdev, sector_nr,
min_bad, 0
return nr_sectors;
}
-static sector_t raid1_size(mddev_t *mddev, sector_t sectors, int raid_disks)
+static sector_t raid1_size(struct mddev *mddev, sector_t sectors, int raid_disks)
{
if (sectors)
return sectors;
return mddev->dev_sectors;
}
-static conf_t *setup_conf(mddev_t *mddev)
+static struct r1conf *setup_conf(struct mddev *mddev)
{
- conf_t *conf;
+ struct r1conf *conf;
int i;
- mirror_info_t *disk;
- mdk_rdev_t *rdev;
+ struct mirror_info *disk;
+ struct md_rdev *rdev;
int err = -ENOMEM;
- conf = kzalloc(sizeof(conf_t), GFP_KERNEL);
+ conf = kzalloc(sizeof(struct r1conf), GFP_KERNEL);
if (!conf)
goto abort;
init_waitqueue_head(&conf->wait_barrier);
bio_list_init(&conf->pending_bio_list);
+ conf->pending_count = 0;
+ conf->recovery_disabled = mddev->recovery_disabled - 1;
conf->last_used = -1;
for (i = 0; i < conf->raid_disks; i++) {
return ERR_PTR(err);
}
-static int run(mddev_t *mddev)
+static int run(struct mddev *mddev)
{
- conf_t *conf;
+ struct r1conf *conf;
int i;
- mdk_rdev_t *rdev;
+ struct md_rdev *rdev;
if (mddev->level != 1) {
printk(KERN_ERR "md/raid1:%s: raid level not set to mirroring (%d)\n",
return md_integrity_register(mddev);
}
-static int stop(mddev_t *mddev)
+static int stop(struct mddev *mddev)
{
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
struct bitmap *bitmap = mddev->bitmap;
/* wait for behind writes to complete */
raise_barrier(conf);
lower_barrier(conf);
- md_unregister_thread(mddev->thread);
- mddev->thread = NULL;
+ md_unregister_thread(&mddev->thread);
if (conf->r1bio_pool)
mempool_destroy(conf->r1bio_pool);
kfree(conf->mirrors);
return 0;
}
-static int raid1_resize(mddev_t *mddev, sector_t sectors)
+static int raid1_resize(struct mddev *mddev, sector_t sectors)
{
/* no resync is happening, and there is enough space
* on all devices, so we can resize.
return 0;
}
-static int raid1_reshape(mddev_t *mddev)
+static int raid1_reshape(struct mddev *mddev)
{
/* We need to:
* 1/ resize the r1bio_pool
*/
mempool_t *newpool, *oldpool;
struct pool_info *newpoolinfo;
- mirror_info_t *newmirrors;
- conf_t *conf = mddev->private;
+ struct mirror_info *newmirrors;
+ struct r1conf *conf = mddev->private;
int cnt, raid_disks;
unsigned long flags;
int d, d2, err;
conf->r1bio_pool = newpool;
for (d = d2 = 0; d < conf->raid_disks; d++) {
- mdk_rdev_t *rdev = conf->mirrors[d].rdev;
+ struct md_rdev *rdev = conf->mirrors[d].rdev;
if (rdev && rdev->raid_disk != d2) {
sysfs_unlink_rdev(mddev, rdev);
rdev->raid_disk = d2;
return 0;
}
-static void raid1_quiesce(mddev_t *mddev, int state)
+static void raid1_quiesce(struct mddev *mddev, int state)
{
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
switch(state) {
case 2: /* wake for suspend */
}
}
-static void *raid1_takeover(mddev_t *mddev)
+static void *raid1_takeover(struct mddev *mddev)
{
/* raid1 can take over:
* raid5 with 2 devices, any layout or chunk size
*/
if (mddev->level == 5 && mddev->raid_disks == 2) {
- conf_t *conf;
+ struct r1conf *conf;
mddev->new_level = 1;
mddev->new_layout = 0;
mddev->new_chunk_sectors = 0;
return ERR_PTR(-EINVAL);
}
-static struct mdk_personality raid1_personality =
+static struct md_personality raid1_personality =
{
.name = "raid1",
.level = 1,
MODULE_ALIAS("md-personality-3"); /* RAID1 */
MODULE_ALIAS("md-raid1");
MODULE_ALIAS("md-level-1");
+
+module_param(max_queued_requests, int, S_IRUGO|S_IWUSR);
projects / firefly-linux-kernel-4.4.55.git / blobdiff