* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <linux/raid/multipath.h>
+#include <linux/blkdev.h>
+#include <linux/raid/md_u.h>
+#include <linux/seq_file.h>
+#include "md.h"
+#include "multipath.h"
#define MAX_WORK_PER_DISK 128
{
unsigned long flags;
mddev_t *mddev = mp_bh->mddev;
- multipath_conf_t *conf = mddev_to_conf(mddev);
+ multipath_conf_t *conf = mddev->private;
spin_lock_irqsave(&conf->device_lock, flags);
list_add(&mp_bh->retry_list, &conf->retry_list);
static void multipath_end_bh_io (struct multipath_bh *mp_bh, int err)
{
struct bio *bio = mp_bh->master_bio;
- multipath_conf_t *conf = mddev_to_conf(mp_bh->mddev);
+ multipath_conf_t *conf = mp_bh->mddev->private;
bio_endio(bio, err);
mempool_free(mp_bh, conf->pool);
{
int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags);
struct multipath_bh * mp_bh = (struct multipath_bh *)(bio->bi_private);
- multipath_conf_t *conf = mddev_to_conf(mp_bh->mddev);
+ multipath_conf_t *conf = mp_bh->mddev->private;
mdk_rdev_t *rdev = conf->multipaths[mp_bh->path].rdev;
if (uptodate)
multipath_end_bh_io(mp_bh, 0);
- else if (!bio_rw_ahead(bio)) {
+ else if (!bio_rw_flagged(bio, BIO_RW_AHEAD)) {
/*
* oops, IO error:
*/
static void unplug_slaves(mddev_t *mddev)
{
- multipath_conf_t *conf = mddev_to_conf(mddev);
+ multipath_conf_t *conf = mddev->private;
int i;
rcu_read_lock();
static int multipath_make_request (struct request_queue *q, struct bio * bio)
{
mddev_t *mddev = q->queuedata;
- multipath_conf_t *conf = mddev_to_conf(mddev);
+ multipath_conf_t *conf = mddev->private;
struct multipath_bh * mp_bh;
struct multipath_info *multipath;
const int rw = bio_data_dir(bio);
int cpu;
- if (unlikely(bio_barrier(bio))) {
- bio_endio(bio, -EOPNOTSUPP);
+ if (unlikely(bio_rw_flagged(bio, BIO_RW_BARRIER))) {
+ md_barrier_request(mddev, bio);
return 0;
}
static void multipath_status (struct seq_file *seq, mddev_t *mddev)
{
- multipath_conf_t *conf = mddev_to_conf(mddev);
+ multipath_conf_t *conf = mddev->private;
int i;
seq_printf (seq, " [%d/%d] [", conf->raid_disks,
static int multipath_congested(void *data, int bits)
{
mddev_t *mddev = data;
- multipath_conf_t *conf = mddev_to_conf(mddev);
+ multipath_conf_t *conf = mddev->private;
int i, ret = 0;
+ if (mddev_congested(mddev, bits))
+ return 1;
+
rcu_read_lock();
for (i = 0; i < mddev->raid_disks ; i++) {
mdk_rdev_t *rdev = rcu_dereference(conf->multipaths[i].rdev);
*/
static void multipath_error (mddev_t *mddev, mdk_rdev_t *rdev)
{
- multipath_conf_t *conf = mddev_to_conf(mddev);
+ multipath_conf_t *conf = mddev->private;
if (conf->working_disks <= 1) {
/*
for (path = first; path <= last; path++)
if ((p=conf->multipaths+path)->rdev == NULL) {
q = rdev->bdev->bd_disk->queue;
- blk_queue_stack_limits(mddev->queue, q);
+ disk_stack_limits(mddev->gendisk, rdev->bdev,
+ rdev->data_offset << 9);
/* as we don't honour merge_bvec_fn, we must never risk
* violating it, so limit ->max_sector to one PAGE, as
* merge_bvec_fn will be involved in multipath.)
*/
if (q->merge_bvec_fn &&
- mddev->queue->max_sectors > (PAGE_SIZE>>9))
+ queue_max_sectors(q) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
conf->working_disks++;
set_bit(In_sync, &rdev->flags);
rcu_assign_pointer(p->rdev, rdev);
err = 0;
+ md_integrity_add_rdev(rdev, mddev);
break;
}
/* lost the race, try later */
err = -EBUSY;
p->rdev = rdev;
+ goto abort;
}
+ md_integrity_register(mddev);
}
abort:
struct multipath_bh *mp_bh;
struct bio *bio;
unsigned long flags;
- multipath_conf_t *conf = mddev_to_conf(mddev);
+ multipath_conf_t *conf = mddev->private;
struct list_head *head = &conf->retry_list;
md_check_recovery(mddev);
spin_unlock_irqrestore(&conf->device_lock, flags);
}
+static sector_t multipath_size(mddev_t *mddev, sector_t sectors, int raid_disks)
+{
+ WARN_ONCE(sectors || raid_disks,
+ "%s does not support generic reshape\n", __func__);
+
+ return mddev->dev_sectors;
+}
+
static int multipath_run (mddev_t *mddev)
{
multipath_conf_t *conf;
struct multipath_info *disk;
mdk_rdev_t *rdev;
+ if (md_check_no_bitmap(mddev))
+ return -EINVAL;
+
if (mddev->level != LEVEL_MULTIPATH) {
printk("multipath: %s: raid level not set to multipath IO (%d)\n",
mdname(mddev), mddev->level);
disk = conf->multipaths + disk_idx;
disk->rdev = rdev;
+ disk_stack_limits(mddev->gendisk, rdev->bdev,
+ rdev->data_offset << 9);
- blk_queue_stack_limits(mddev->queue,
- rdev->bdev->bd_disk->queue);
/* as we don't honour merge_bvec_fn, we must never risk
* violating it, not that we ever expect a device with
* a merge_bvec_fn to be involved in multipath */
if (rdev->bdev->bd_disk->queue->merge_bvec_fn &&
- mddev->queue->max_sectors > (PAGE_SIZE>>9))
+ queue_max_sectors(mddev->queue) > (PAGE_SIZE>>9))
blk_queue_max_sectors(mddev->queue, PAGE_SIZE>>9);
if (!test_bit(Faulty, &rdev->flags))
}
mddev->degraded = conf->raid_disks - conf->working_disks;
- conf->pool = mempool_create_kzalloc_pool(NR_RESERVED_BUFS,
+ conf->pool = mempool_create_kmalloc_pool(NR_RESERVED_BUFS,
sizeof(struct multipath_bh));
if (conf->pool == NULL) {
printk(KERN_ERR
}
{
- mddev->thread = md_register_thread(multipathd, mddev, "%s_multipath");
+ mddev->thread = md_register_thread(multipathd, mddev, NULL);
if (!mddev->thread) {
printk(KERN_ERR "multipath: couldn't allocate thread"
" for %s\n", mdname(mddev));
/*
* Ok, everything is just fine now
*/
- mddev->array_sectors = mddev->size * 2;
+ md_set_array_sectors(mddev, multipath_size(mddev, 0, 0));
mddev->queue->unplug_fn = multipath_unplug;
mddev->queue->backing_dev_info.congested_fn = multipath_congested;
mddev->queue->backing_dev_info.congested_data = mddev;
-
+ md_integrity_register(mddev);
return 0;
out_free_conf:
static int multipath_stop (mddev_t *mddev)
{
- multipath_conf_t *conf = mddev_to_conf(mddev);
+ multipath_conf_t *conf = mddev->private;
md_unregister_thread(mddev->thread);
mddev->thread = NULL;
.error_handler = multipath_error,
.hot_add_disk = multipath_add_disk,
.hot_remove_disk= multipath_remove_disk,
+ .size = multipath_size,
};
static int __init multipath_init (void)
module_init(multipath_init);
module_exit(multipath_exit);
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("simple multi-path personality for MD");
MODULE_ALIAS("md-personality-7"); /* MULTIPATH */
MODULE_ALIAS("md-multipath");
MODULE_ALIAS("md-level--4");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff