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-rw-r--r--drivers/md/raid1.c360
1 files changed, 192 insertions, 168 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 32323f0afd89..ede2461e79c5 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -34,28 +34,31 @@
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/blkdev.h>
+#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/ratelimit.h>
#include "md.h"
#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);
@@ -76,7 +79,7 @@ static void * r1buf_pool_alloc(gfp_t gfp_flags, void *data)
{
struct pool_info *pi = data;
struct page *page;
- r1bio_t *r1_bio;
+ struct r1bio *r1_bio;
struct bio *bio;
int i, j;
@@ -142,7 +145,7 @@ static void r1buf_pool_free(void *__r1_bio, void *data)
{
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-- ;) {
@@ -157,7 +160,7 @@ static void r1buf_pool_free(void *__r1_bio, void *data)
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;
@@ -169,17 +172,17 @@ static void put_all_bios(conf_t *conf, r1bio_t *r1_bio)
}
}
-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++) {
@@ -193,11 +196,11 @@ static void put_buf(r1bio_t *r1_bio)
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);
@@ -213,11 +216,11 @@ static void reschedule_retry(r1bio_t *r1_bio)
* 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;
@@ -240,17 +243,17 @@ static void call_bio_endio(r1bio_t *r1_bio)
}
}
-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);
}
@@ -260,20 +263,38 @@ static void raid_end_bio_io(r1bio_t *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;
/*
@@ -318,7 +339,7 @@ static void raid1_end_read_request(struct bio *bio, int error)
rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev);
}
-static void close_write(r1bio_t *r1_bio)
+static void close_write(struct r1bio *r1_bio)
{
/* it really is the end of this request */
if (test_bit(R1BIO_BehindIO, &r1_bio->state)) {
@@ -337,7 +358,7 @@ static void close_write(r1bio_t *r1_bio)
md_write_end(r1_bio->mddev);
}
-static void r1_bio_write_done(r1bio_t *r1_bio)
+static void r1_bio_write_done(struct r1bio *r1_bio)
{
if (!atomic_dec_and_test(&r1_bio->remaining))
return;
@@ -356,15 +377,12 @@ static void r1_bio_write_done(r1bio_t *r1_bio)
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:
@@ -400,8 +418,6 @@ static void raid1_end_write_request(struct bio *bio, int error)
}
}
- update_head_pos(mirror, r1_bio);
-
if (behind) {
if (test_bit(WriteMostly, &conf->mirrors[mirror].rdev->flags))
atomic_dec(&r1_bio->behind_remaining);
@@ -418,10 +434,11 @@ static void raid1_end_write_request(struct bio *bio, int error)
/* 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);
}
}
@@ -455,7 +472,7 @@ static void raid1_end_write_request(struct bio *bio, int error)
*
* 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;
@@ -464,7 +481,7 @@ static int read_balance(conf_t *conf, r1bio_t *r1_bio, int *max_sectors)
int best_disk;
int i;
sector_t best_dist;
- mdk_rdev_t *rdev;
+ struct md_rdev *rdev;
int choose_first;
rcu_read_lock();
@@ -582,14 +599,18 @@ static int read_balance(conf_t *conf, r1bio_t *r1_bio, int *max_sectors)
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);
@@ -611,13 +632,13 @@ EXPORT_SYMBOL_GPL(md_raid1_congested);
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.
@@ -627,10 +648,12 @@ static void flush_pending_writes(conf_t *conf)
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;
@@ -665,7 +688,7 @@ static void flush_pending_writes(conf_t *conf)
*/
#define RESYNC_DEPTH 32
-static void raise_barrier(conf_t *conf)
+static void raise_barrier(struct r1conf *conf)
{
spin_lock_irq(&conf->resync_lock);
@@ -684,7 +707,7 @@ static void raise_barrier(conf_t *conf)
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);
@@ -694,7 +717,7 @@ static void lower_barrier(conf_t *conf)
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) {
@@ -708,7 +731,7 @@ static void wait_barrier(conf_t *conf)
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);
@@ -717,7 +740,7 @@ static void allow_barrier(conf_t *conf)
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.
@@ -740,7 +763,7 @@ static void freeze_array(conf_t *conf)
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);
@@ -753,7 +776,7 @@ static void unfreeze_array(conf_t *conf)
/* 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;
@@ -782,14 +805,14 @@ do_sync_io:
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 void 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;
@@ -797,7 +820,7 @@ static int make_request(mddev_t *mddev, struct bio * bio)
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;
@@ -870,7 +893,7 @@ read_again:
if (rdisk < 0) {
/* couldn't find anywhere to read from */
raid_end_bio_io(r1_bio);
- return 0;
+ return;
}
mirror = conf->mirrors + rdisk;
@@ -928,12 +951,17 @@ read_again:
goto read_again;
} else
generic_make_request(read_bio);
- return 0;
+ return;
}
/*
* 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
@@ -952,7 +980,7 @@ read_again:
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;
@@ -1097,14 +1125,14 @@ read_again:
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
*/
@@ -1117,22 +1145,25 @@ read_again:
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" : "_");
}
@@ -1141,10 +1172,10 @@ static void status(struct seq_file *seq, mddev_t *mddev)
}
-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
@@ -1184,7 +1215,7 @@ static void error(mddev_t *mddev, mdk_rdev_t *rdev)
mdname(mddev), conf->raid_disks - mddev->degraded);
}
-static void print_conf(conf_t *conf)
+static void print_conf(struct r1conf *conf)
{
int i;
@@ -1199,7 +1230,7 @@ static void print_conf(conf_t *conf)
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),
@@ -1209,7 +1240,7 @@ static void print_conf(conf_t *conf)
rcu_read_unlock();
}
-static void close_sync(conf_t *conf)
+static void close_sync(struct r1conf *conf)
{
wait_barrier(conf);
allow_barrier(conf);
@@ -1218,10 +1249,10 @@ static void close_sync(conf_t *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;
@@ -1231,7 +1262,7 @@ static int raid1_spare_active(mddev_t *mddev)
* 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)) {
@@ -1248,12 +1279,12 @@ static int raid1_spare_active(mddev_t *mddev)
}
-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;
@@ -1296,12 +1327,12 @@ static int raid1_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
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;
@@ -1339,14 +1370,10 @@ abort:
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.
@@ -1362,19 +1389,15 @@ static void end_sync_read(struct bio *bio, int error)
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;
@@ -1400,8 +1423,6 @@ static void end_sync_write(struct bio *bio, int error)
)
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) ||
@@ -1414,7 +1435,7 @@ static void end_sync_write(struct bio *bio, int error)
}
}
-static int r1_sync_page_io(mdk_rdev_t *rdev, sector_t sector,
+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))
@@ -1428,7 +1449,7 @@ static int r1_sync_page_io(mdk_rdev_t *rdev, sector_t sector,
return 0;
}
-static int fix_sync_read_error(r1bio_t *r1_bio)
+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
@@ -1441,8 +1462,8 @@ static int fix_sync_read_error(r1bio_t *r1_bio)
* 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;
@@ -1452,7 +1473,7 @@ static int fix_sync_read_error(r1bio_t *r1_bio)
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))
@@ -1497,7 +1518,8 @@ static int fix_sync_read_error(r1bio_t *r1_bio)
abort = 1;
}
if (abort) {
- mddev->recovery_disabled = 1;
+ 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);
@@ -1548,7 +1570,7 @@ static int fix_sync_read_error(r1bio_t *r1_bio)
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.
@@ -1557,8 +1579,8 @@ static int process_checks(r1bio_t *r1_bio)
* 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;
@@ -1630,9 +1652,9 @@ static int process_checks(r1bio_t *r1_bio)
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;
@@ -1682,16 +1704,16 @@ static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio)
* 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;
@@ -1722,7 +1744,7 @@ static void fix_read_error(conf_t *conf, int read_disk,
if (!success) {
/* Cannot read from anywhere - mark it bad */
- mdk_rdev_t *rdev = conf->mirrors[read_disk].rdev;
+ struct md_rdev *rdev = conf->mirrors[read_disk].rdev;
if (!rdev_set_badblocks(rdev, sect, s, 0))
md_error(mddev, rdev);
break;
@@ -1785,11 +1807,11 @@ static int submit_bio_wait(int rw, struct bio *bio)
return test_bit(BIO_UPTODATE, &bio->bi_flags);
}
-static int narrow_write_error(r1bio_t *r1_bio, int i)
+static int narrow_write_error(struct r1bio *r1_bio, int i)
{
- mddev_t *mddev = r1_bio->mddev;
- conf_t *conf = mddev->private;
- mdk_rdev_t *rdev = conf->mirrors[i].rdev;
+ 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;
@@ -1861,12 +1883,12 @@ static int narrow_write_error(r1bio_t *r1_bio, int i)
return ok;
}
-static void handle_sync_write_finished(conf_t *conf, r1bio_t *r1_bio)
+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++) {
- mdk_rdev_t *rdev = conf->mirrors[m].rdev;
+ struct md_rdev *rdev = conf->mirrors[m].rdev;
struct bio *bio = r1_bio->bios[m];
if (bio->bi_end_io == NULL)
continue;
@@ -1884,12 +1906,12 @@ static void handle_sync_write_finished(conf_t *conf, r1bio_t *r1_bio)
md_done_sync(conf->mddev, s, 1);
}
-static void handle_write_finished(conf_t *conf, r1bio_t *r1_bio)
+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) {
- mdk_rdev_t *rdev = conf->mirrors[m].rdev;
+ struct md_rdev *rdev = conf->mirrors[m].rdev;
rdev_clear_badblocks(rdev,
r1_bio->sector,
r1_bio->sectors);
@@ -1913,14 +1935,14 @@ static void handle_write_finished(conf_t *conf, r1bio_t *r1_bio)
raid_end_bio_io(r1_bio);
}
-static void handle_read_error(conf_t *conf, r1bio_t *r1_bio)
+static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio)
{
int disk;
int max_sectors;
- mddev_t *mddev = conf->mddev;
+ struct mddev *mddev = conf->mddev;
struct bio *bio;
char b[BDEVNAME_SIZE];
- mdk_rdev_t *rdev;
+ struct md_rdev *rdev;
clear_bit(R1BIO_ReadError, &r1_bio->state);
/* we got a read error. Maybe the drive is bad. Maybe just
@@ -2003,11 +2025,11 @@ read_more:
}
}
-static void raid1d(mddev_t *mddev)
+static void raid1d(struct mddev *mddev)
{
- r1bio_t *r1_bio;
+ struct r1bio *r1_bio;
unsigned long flags;
- conf_t *conf = mddev->private;
+ struct r1conf *conf = mddev->private;
struct list_head *head = &conf->retry_list;
struct blk_plug plug;
@@ -2024,7 +2046,7 @@ static void raid1d(mddev_t *mddev)
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);
@@ -2056,7 +2078,7 @@ static void raid1d(mddev_t *mddev)
}
-static int init_resync(conf_t *conf)
+static int init_resync(struct r1conf *conf)
{
int buffs;
@@ -2080,10 +2102,10 @@ static int init_resync(conf_t *conf)
* 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;
@@ -2163,14 +2185,13 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
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 */
bio->bi_next = NULL;
bio->bi_flags &= ~(BIO_POOL_MASK-1);
bio->bi_flags |= 1 << BIO_UPTODATE;
- bio->bi_comp_cpu = -1;
bio->bi_rw = READ;
bio->bi_vcnt = 0;
bio->bi_idx = 0;
@@ -2235,7 +2256,7 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
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
@@ -2352,7 +2373,7 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
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;
@@ -2360,15 +2381,15 @@ static sector_t raid1_size(mddev_t *mddev, sector_t sectors, int raid_disks)
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;
@@ -2413,6 +2434,8 @@ static conf_t *setup_conf(mddev_t *mddev)
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++) {
@@ -2461,11 +2484,11 @@ static conf_t *setup_conf(mddev_t *mddev)
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",
@@ -2541,9 +2564,9 @@ static int run(mddev_t *mddev)
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 */
@@ -2558,8 +2581,7 @@ static int stop(mddev_t *mddev)
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);
@@ -2569,7 +2591,7 @@ static int stop(mddev_t *mddev)
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.
@@ -2593,7 +2615,7 @@ static int raid1_resize(mddev_t *mddev, sector_t sectors)
return 0;
}
-static int raid1_reshape(mddev_t *mddev)
+static int raid1_reshape(struct mddev *mddev)
{
/* We need to:
* 1/ resize the r1bio_pool
@@ -2608,8 +2630,8 @@ static int raid1_reshape(mddev_t *mddev)
*/
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;
@@ -2665,7 +2687,7 @@ static int raid1_reshape(mddev_t *mddev)
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;
@@ -2699,9 +2721,9 @@ static int raid1_reshape(mddev_t *mddev)
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 */
@@ -2716,13 +2738,13 @@ static void raid1_quiesce(mddev_t *mddev, int state)
}
}
-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;
@@ -2734,7 +2756,7 @@ static void *raid1_takeover(mddev_t *mddev)
return ERR_PTR(-EINVAL);
}
-static struct mdk_personality raid1_personality =
+static struct md_personality raid1_personality =
{
.name = "raid1",
.level = 1,
@@ -2772,3 +2794,5 @@ MODULE_DESCRIPTION("RAID1 (mirroring) personality for MD");
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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.