static struct block_device_operations md_fops;
+static int start_readonly;
+
/*
* Enables to iterate over all existing md arrays
* all_mddevs_lock protects this list.
if (!mddev->raid_disks && list_empty(&mddev->disks)) {
list_del(&mddev->all_mddevs);
blk_put_queue(mddev->queue);
- kfree(mddev);
+ kobject_unregister(&mddev->kobj);
}
spin_unlock(&all_mddevs_lock);
}
static int super_written(struct bio *bio, unsigned int bytes_done, int error)
{
mdk_rdev_t *rdev = bio->bi_private;
+ mddev_t *mddev = rdev->mddev;
if (bio->bi_size)
return 1;
if (error || !test_bit(BIO_UPTODATE, &bio->bi_flags))
- md_error(rdev->mddev, rdev);
+ md_error(mddev, rdev);
- if (atomic_dec_and_test(&rdev->mddev->pending_writes))
- wake_up(&rdev->mddev->sb_wait);
+ if (atomic_dec_and_test(&mddev->pending_writes))
+ wake_up(&mddev->sb_wait);
bio_put(bio);
return 0;
}
+static int super_written_barrier(struct bio *bio, unsigned int bytes_done, int error)
+{
+ struct bio *bio2 = bio->bi_private;
+ mdk_rdev_t *rdev = bio2->bi_private;
+ mddev_t *mddev = rdev->mddev;
+ if (bio->bi_size)
+ return 1;
+
+ if (!test_bit(BIO_UPTODATE, &bio->bi_flags) &&
+ error == -EOPNOTSUPP) {
+ unsigned long flags;
+ /* barriers don't appear to be supported :-( */
+ set_bit(BarriersNotsupp, &rdev->flags);
+ mddev->barriers_work = 0;
+ spin_lock_irqsave(&mddev->write_lock, flags);
+ bio2->bi_next = mddev->biolist;
+ mddev->biolist = bio2;
+ spin_unlock_irqrestore(&mddev->write_lock, flags);
+ wake_up(&mddev->sb_wait);
+ bio_put(bio);
+ return 0;
+ }
+ bio_put(bio2);
+ bio->bi_private = rdev;
+ return super_written(bio, bytes_done, error);
+}
+
void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev,
sector_t sector, int size, struct page *page)
{
* and decrement it on completion, waking up sb_wait
* if zero is reached.
* If an error occurred, call md_error
+ *
+ * As we might need to resubmit the request if BIO_RW_BARRIER
+ * causes ENOTSUPP, we allocate a spare bio...
*/
struct bio *bio = bio_alloc(GFP_NOIO, 1);
+ int rw = (1<<BIO_RW) | (1<<BIO_RW_SYNC);
bio->bi_bdev = rdev->bdev;
bio->bi_sector = sector;
bio_add_page(bio, page, size, 0);
bio->bi_private = rdev;
bio->bi_end_io = super_written;
+ bio->bi_rw = rw;
+
atomic_inc(&mddev->pending_writes);
- submit_bio((1<<BIO_RW)|(1<<BIO_RW_SYNC), bio);
+ if (!test_bit(BarriersNotsupp, &rdev->flags)) {
+ struct bio *rbio;
+ rw |= (1<<BIO_RW_BARRIER);
+ rbio = bio_clone(bio, GFP_NOIO);
+ rbio->bi_private = bio;
+ rbio->bi_end_io = super_written_barrier;
+ submit_bio(rw, rbio);
+ } else
+ submit_bio(rw, bio);
+}
+
+void md_super_wait(mddev_t *mddev)
+{
+ /* wait for all superblock writes that were scheduled to complete.
+ * if any had to be retried (due to BARRIER problems), retry them
+ */
+ DEFINE_WAIT(wq);
+ for(;;) {
+ prepare_to_wait(&mddev->sb_wait, &wq, TASK_UNINTERRUPTIBLE);
+ if (atomic_read(&mddev->pending_writes)==0)
+ break;
+ while (mddev->biolist) {
+ struct bio *bio;
+ spin_lock_irq(&mddev->write_lock);
+ bio = mddev->biolist;
+ mddev->biolist = bio->bi_next ;
+ bio->bi_next = NULL;
+ spin_unlock_irq(&mddev->write_lock);
+ submit_bio(bio->bi_rw, bio);
+ }
+ schedule();
+ }
+ finish_wait(&mddev->sb_wait, &wq);
}
static int bi_complete(struct bio *bio, unsigned int bytes_done, int error)
mdp_super_t *sb = (mdp_super_t *)page_address(rdev->sb_page);
rdev->raid_disk = -1;
- rdev->in_sync = 0;
+ rdev->flags = 0;
if (mddev->raid_disks == 0) {
mddev->major_version = 0;
mddev->minor_version = sb->minor_version;
return 0;
if (mddev->level != LEVEL_MULTIPATH) {
- rdev->faulty = 0;
- rdev->flags = 0;
desc = sb->disks + rdev->desc_nr;
if (desc->state & (1<<MD_DISK_FAULTY))
- rdev->faulty = 1;
+ set_bit(Faulty, &rdev->flags);
else if (desc->state & (1<<MD_DISK_SYNC) &&
desc->raid_disk < mddev->raid_disks) {
- rdev->in_sync = 1;
+ set_bit(In_sync, &rdev->flags);
rdev->raid_disk = desc->raid_disk;
}
if (desc->state & (1<<MD_DISK_WRITEMOSTLY))
set_bit(WriteMostly, &rdev->flags);
} else /* MULTIPATH are always insync */
- rdev->in_sync = 1;
+ set_bit(In_sync, &rdev->flags);
return 0;
}
mdk_rdev_t *rdev2;
int next_spare = mddev->raid_disks;
+
/* make rdev->sb match mddev data..
*
* 1/ zero out disks
sb->disks[0].state = (1<<MD_DISK_REMOVED);
ITERATE_RDEV(mddev,rdev2,tmp) {
mdp_disk_t *d;
- if (rdev2->raid_disk >= 0 && rdev2->in_sync && !rdev2->faulty)
- rdev2->desc_nr = rdev2->raid_disk;
+ int desc_nr;
+ if (rdev2->raid_disk >= 0 && test_bit(In_sync, &rdev2->flags)
+ && !test_bit(Faulty, &rdev2->flags))
+ desc_nr = rdev2->raid_disk;
else
- rdev2->desc_nr = next_spare++;
+ desc_nr = next_spare++;
+ rdev2->desc_nr = desc_nr;
d = &sb->disks[rdev2->desc_nr];
nr_disks++;
d->number = rdev2->desc_nr;
d->major = MAJOR(rdev2->bdev->bd_dev);
d->minor = MINOR(rdev2->bdev->bd_dev);
- if (rdev2->raid_disk >= 0 && rdev->in_sync && !rdev2->faulty)
+ if (rdev2->raid_disk >= 0 && test_bit(In_sync, &rdev2->flags)
+ && !test_bit(Faulty, &rdev2->flags))
d->raid_disk = rdev2->raid_disk;
else
d->raid_disk = rdev2->desc_nr; /* compatibility */
- if (rdev2->faulty) {
+ if (test_bit(Faulty, &rdev2->flags)) {
d->state = (1<<MD_DISK_FAULTY);
failed++;
- } else if (rdev2->in_sync) {
+ } else if (test_bit(In_sync, &rdev2->flags)) {
d->state = (1<<MD_DISK_ACTIVE);
d->state |= (1<<MD_DISK_SYNC);
active++;
if (test_bit(WriteMostly, &rdev2->flags))
d->state |= (1<<MD_DISK_WRITEMOSTLY);
}
-
/* now set the "removed" and "faulty" bits on any missing devices */
for (i=0 ; i < mddev->raid_disks ; i++) {
mdp_disk_t *d = &sb->disks[i];
struct mdp_superblock_1 *sb = (struct mdp_superblock_1*)page_address(rdev->sb_page);
rdev->raid_disk = -1;
- rdev->in_sync = 0;
+ rdev->flags = 0;
if (mddev->raid_disks == 0) {
mddev->major_version = 1;
mddev->patch_version = 0;
mddev->size = le64_to_cpu(sb->size)/2;
mddev->events = le64_to_cpu(sb->events);
mddev->bitmap_offset = 0;
- mddev->default_bitmap_offset = 0;
mddev->default_bitmap_offset = 1024;
mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]);
switch(role) {
case 0xffff: /* spare */
- rdev->faulty = 0;
break;
case 0xfffe: /* faulty */
- rdev->faulty = 1;
+ set_bit(Faulty, &rdev->flags);
break;
default:
- rdev->in_sync = 1;
- rdev->faulty = 0;
+ set_bit(In_sync, &rdev->flags);
rdev->raid_disk = role;
break;
}
- rdev->flags = 0;
if (sb->devflags & WriteMostly1)
set_bit(WriteMostly, &rdev->flags);
} else /* MULTIPATH are always insync */
- rdev->in_sync = 1;
+ set_bit(In_sync, &rdev->flags);
return 0;
}
ITERATE_RDEV(mddev,rdev2,tmp) {
i = rdev2->desc_nr;
- if (rdev2->faulty)
+ if (test_bit(Faulty, &rdev2->flags))
sb->dev_roles[i] = cpu_to_le16(0xfffe);
- else if (rdev2->in_sync)
+ else if (test_bit(In_sync, &rdev2->flags))
sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk);
else
sb->dev_roles[i] = cpu_to_le16(0xffff);
{
mdk_rdev_t *same_pdev;
char b[BDEVNAME_SIZE], b2[BDEVNAME_SIZE];
+ struct kobject *ko;
if (rdev->mddev) {
MD_BUG();
if (find_rdev_nr(mddev, rdev->desc_nr))
return -EBUSY;
}
+ bdevname(rdev->bdev,b);
+ if (kobject_set_name(&rdev->kobj, "dev-%s", b) < 0)
+ return -ENOMEM;
list_add(&rdev->same_set, &mddev->disks);
rdev->mddev = mddev;
- printk(KERN_INFO "md: bind<%s>\n", bdevname(rdev->bdev,b));
+ printk(KERN_INFO "md: bind<%s>\n", b);
+
+ rdev->kobj.parent = &mddev->kobj;
+ kobject_add(&rdev->kobj);
+
+ if (rdev->bdev->bd_part)
+ ko = &rdev->bdev->bd_part->kobj;
+ else
+ ko = &rdev->bdev->bd_disk->kobj;
+ sysfs_create_link(&rdev->kobj, ko, "block");
return 0;
}
list_del_init(&rdev->same_set);
printk(KERN_INFO "md: unbind<%s>\n", bdevname(rdev->bdev,b));
rdev->mddev = NULL;
+ sysfs_remove_link(&rdev->kobj, "block");
+ kobject_del(&rdev->kobj);
}
/*
md_autodetect_dev(rdev->bdev->bd_dev);
#endif
unlock_rdev(rdev);
- kfree(rdev);
+ kobject_put(&rdev->kobj);
}
static void kick_rdev_from_array(mdk_rdev_t * rdev)
char b[BDEVNAME_SIZE];
printk(KERN_INFO "md: rdev %s, SZ:%08llu F:%d S:%d DN:%u\n",
bdevname(rdev->bdev,b), (unsigned long long)rdev->size,
- rdev->faulty, rdev->in_sync, rdev->desc_nr);
+ test_bit(Faulty, &rdev->flags), test_bit(In_sync, &rdev->flags),
+ rdev->desc_nr);
if (rdev->sb_loaded) {
printk(KERN_INFO "md: rdev superblock:\n");
print_sb((mdp_super_t*)page_address(rdev->sb_page));
int sync_req;
repeat:
- spin_lock(&mddev->write_lock);
+ spin_lock_irq(&mddev->write_lock);
sync_req = mddev->in_sync;
mddev->utime = get_seconds();
mddev->events ++;
*/
if (!mddev->persistent) {
mddev->sb_dirty = 0;
- spin_unlock(&mddev->write_lock);
+ spin_unlock_irq(&mddev->write_lock);
wake_up(&mddev->sb_wait);
return;
}
- spin_unlock(&mddev->write_lock);
+ spin_unlock_irq(&mddev->write_lock);
dprintk(KERN_INFO
"md: updating %s RAID superblock on device (in sync %d)\n",
ITERATE_RDEV(mddev,rdev,tmp) {
char b[BDEVNAME_SIZE];
dprintk(KERN_INFO "md: ");
- if (rdev->faulty)
+ if (test_bit(Faulty, &rdev->flags))
dprintk("(skipping faulty ");
dprintk("%s ", bdevname(rdev->bdev,b));
- if (!rdev->faulty) {
+ if (!test_bit(Faulty, &rdev->flags)) {
md_super_write(mddev,rdev,
rdev->sb_offset<<1, rdev->sb_size,
rdev->sb_page);
/* only need to write one superblock... */
break;
}
- wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0);
+ md_super_wait(mddev);
/* if there was a failure, sb_dirty was set to 1, and we re-write super */
- spin_lock(&mddev->write_lock);
+ spin_lock_irq(&mddev->write_lock);
if (mddev->in_sync != sync_req|| mddev->sb_dirty == 1) {
/* have to write it out again */
- spin_unlock(&mddev->write_lock);
+ spin_unlock_irq(&mddev->write_lock);
goto repeat;
}
mddev->sb_dirty = 0;
- spin_unlock(&mddev->write_lock);
+ spin_unlock_irq(&mddev->write_lock);
wake_up(&mddev->sb_wait);
}
+struct rdev_sysfs_entry {
+ struct attribute attr;
+ ssize_t (*show)(mdk_rdev_t *, char *);
+ ssize_t (*store)(mdk_rdev_t *, const char *, size_t);
+};
+
+static ssize_t
+state_show(mdk_rdev_t *rdev, char *page)
+{
+ char *sep = "";
+ int len=0;
+
+ if (test_bit(Faulty, &rdev->flags)) {
+ len+= sprintf(page+len, "%sfaulty",sep);
+ sep = ",";
+ }
+ if (test_bit(In_sync, &rdev->flags)) {
+ len += sprintf(page+len, "%sin_sync",sep);
+ sep = ",";
+ }
+ if (!test_bit(Faulty, &rdev->flags) &&
+ !test_bit(In_sync, &rdev->flags)) {
+ len += sprintf(page+len, "%sspare", sep);
+ sep = ",";
+ }
+ return len+sprintf(page+len, "\n");
+}
+
+static struct rdev_sysfs_entry
+rdev_state = __ATTR_RO(state);
+
+static ssize_t
+super_show(mdk_rdev_t *rdev, char *page)
+{
+ if (rdev->sb_loaded && rdev->sb_size) {
+ memcpy(page, page_address(rdev->sb_page), rdev->sb_size);
+ return rdev->sb_size;
+ } else
+ return 0;
+}
+static struct rdev_sysfs_entry rdev_super = __ATTR_RO(super);
+
+static struct attribute *rdev_default_attrs[] = {
+ &rdev_state.attr,
+ &rdev_super.attr,
+ NULL,
+};
+static ssize_t
+rdev_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
+{
+ struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr);
+ mdk_rdev_t *rdev = container_of(kobj, mdk_rdev_t, kobj);
+
+ if (!entry->show)
+ return -EIO;
+ return entry->show(rdev, page);
+}
+
+static ssize_t
+rdev_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *page, size_t length)
+{
+ struct rdev_sysfs_entry *entry = container_of(attr, struct rdev_sysfs_entry, attr);
+ mdk_rdev_t *rdev = container_of(kobj, mdk_rdev_t, kobj);
+
+ if (!entry->store)
+ return -EIO;
+ return entry->store(rdev, page, length);
+}
+
+static void rdev_free(struct kobject *ko)
+{
+ mdk_rdev_t *rdev = container_of(ko, mdk_rdev_t, kobj);
+ kfree(rdev);
+}
+static struct sysfs_ops rdev_sysfs_ops = {
+ .show = rdev_attr_show,
+ .store = rdev_attr_store,
+};
+static struct kobj_type rdev_ktype = {
+ .release = rdev_free,
+ .sysfs_ops = &rdev_sysfs_ops,
+ .default_attrs = rdev_default_attrs,
+};
+
/*
* Import a device. If 'super_format' >= 0, then sanity check the superblock
*
if (err)
goto abort_free;
+ rdev->kobj.parent = NULL;
+ rdev->kobj.ktype = &rdev_ktype;
+ kobject_init(&rdev->kobj);
+
rdev->desc_nr = -1;
- rdev->faulty = 0;
- rdev->in_sync = 0;
+ rdev->flags = 0;
rdev->data_offset = 0;
atomic_set(&rdev->nr_pending, 0);
+ atomic_set(&rdev->read_errors, 0);
size = rdev->bdev->bd_inode->i_size >> BLOCK_SIZE_BITS;
if (!size) {
if (mddev->level == LEVEL_MULTIPATH) {
rdev->desc_nr = i++;
rdev->raid_disk = rdev->desc_nr;
- rdev->in_sync = 1;
+ set_bit(In_sync, &rdev->flags);
}
}
}
+static ssize_t
+level_show(mddev_t *mddev, char *page)
+{
+ mdk_personality_t *p = mddev->pers;
+ if (p == NULL && mddev->raid_disks == 0)
+ return 0;
+ if (mddev->level >= 0)
+ return sprintf(page, "RAID-%d\n", mddev->level);
+ else
+ return sprintf(page, "%s\n", p->name);
+}
+
+static struct md_sysfs_entry md_level = __ATTR_RO(level);
+
+static ssize_t
+raid_disks_show(mddev_t *mddev, char *page)
+{
+ if (mddev->raid_disks == 0)
+ return 0;
+ return sprintf(page, "%d\n", mddev->raid_disks);
+}
+
+static struct md_sysfs_entry md_raid_disks = __ATTR_RO(raid_disks);
+
+static ssize_t
+action_show(mddev_t *mddev, char *page)
+{
+ char *type = "idle";
+ if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
+ test_bit(MD_RECOVERY_NEEDED, &mddev->recovery)) {
+ if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
+ if (!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
+ type = "resync";
+ else if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery))
+ type = "check";
+ else
+ type = "repair";
+ } else
+ type = "recover";
+ }
+ return sprintf(page, "%s\n", type);
+}
+
+static ssize_t
+action_store(mddev_t *mddev, const char *page, size_t len)
+{
+ if (!mddev->pers || !mddev->pers->sync_request)
+ return -EINVAL;
+
+ if (strcmp(page, "idle")==0 || strcmp(page, "idle\n")==0) {
+ if (mddev->sync_thread) {
+ set_bit(MD_RECOVERY_INTR, &mddev->recovery);
+ md_unregister_thread(mddev->sync_thread);
+ mddev->sync_thread = NULL;
+ mddev->recovery = 0;
+ }
+ return len;
+ }
+
+ if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
+ test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))
+ return -EBUSY;
+ if (strcmp(page, "resync")==0 || strcmp(page, "resync\n")==0 ||
+ strcmp(page, "recover")==0 || strcmp(page, "recover\n")==0)
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ else {
+ if (strcmp(page, "check")==0 || strcmp(page, "check\n")==0)
+ set_bit(MD_RECOVERY_CHECK, &mddev->recovery);
+ else if (strcmp(page, "repair")!=0 && strcmp(page, "repair\n")!=0)
+ return -EINVAL;
+ set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
+ set_bit(MD_RECOVERY_SYNC, &mddev->recovery);
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ }
+ md_wakeup_thread(mddev->thread);
+ return len;
+}
+
+static ssize_t
+mismatch_cnt_show(mddev_t *mddev, char *page)
+{
+ return sprintf(page, "%llu\n",
+ (unsigned long long) mddev->resync_mismatches);
+}
+
+static struct md_sysfs_entry
+md_scan_mode = __ATTR(sync_action, S_IRUGO|S_IWUSR, action_show, action_store);
+
+
+static struct md_sysfs_entry
+md_mismatches = __ATTR_RO(mismatch_cnt);
+
+static struct attribute *md_default_attrs[] = {
+ &md_level.attr,
+ &md_raid_disks.attr,
+ NULL,
+};
+
+static struct attribute *md_redundancy_attrs[] = {
+ &md_scan_mode.attr,
+ &md_mismatches.attr,
+ NULL,
+};
+static struct attribute_group md_redundancy_group = {
+ .name = NULL,
+ .attrs = md_redundancy_attrs,
+};
+
+
+static ssize_t
+md_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
+{
+ struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr);
+ mddev_t *mddev = container_of(kobj, struct mddev_s, kobj);
+ ssize_t rv;
+
+ if (!entry->show)
+ return -EIO;
+ mddev_lock(mddev);
+ rv = entry->show(mddev, page);
+ mddev_unlock(mddev);
+ return rv;
+}
+
+static ssize_t
+md_attr_store(struct kobject *kobj, struct attribute *attr,
+ const char *page, size_t length)
+{
+ struct md_sysfs_entry *entry = container_of(attr, struct md_sysfs_entry, attr);
+ mddev_t *mddev = container_of(kobj, struct mddev_s, kobj);
+ ssize_t rv;
+
+ if (!entry->store)
+ return -EIO;
+ mddev_lock(mddev);
+ rv = entry->store(mddev, page, length);
+ mddev_unlock(mddev);
+ return rv;
+}
+
+static void md_free(struct kobject *ko)
+{
+ mddev_t *mddev = container_of(ko, mddev_t, kobj);
+ kfree(mddev);
+}
+
+static struct sysfs_ops md_sysfs_ops = {
+ .show = md_attr_show,
+ .store = md_attr_store,
+};
+static struct kobj_type md_ktype = {
+ .release = md_free,
+ .sysfs_ops = &md_sysfs_ops,
+ .default_attrs = md_default_attrs,
+};
+
int mdp_major = 0;
static struct kobject *md_probe(dev_t dev, int *part, void *data)
add_disk(disk);
mddev->gendisk = disk;
up(&disks_sem);
+ mddev->kobj.parent = &disk->kobj;
+ mddev->kobj.k_name = NULL;
+ snprintf(mddev->kobj.name, KOBJ_NAME_LEN, "%s", "md");
+ mddev->kobj.ktype = &md_ktype;
+ kobject_register(&mddev->kobj);
return NULL;
}
/* devices must have minimum size of one chunk */
ITERATE_RDEV(mddev,rdev,tmp) {
- if (rdev->faulty)
+ if (test_bit(Faulty, &rdev->flags))
continue;
if (rdev->size < chunk_size / 1024) {
printk(KERN_WARNING
* Also find largest hardsector size
*/
ITERATE_RDEV(mddev,rdev,tmp) {
- if (rdev->faulty)
+ if (test_bit(Faulty, &rdev->flags))
continue;
sync_blockdev(rdev->bdev);
invalidate_bdev(rdev->bdev, 0);
mddev->recovery = 0;
mddev->resync_max_sectors = mddev->size << 1; /* may be over-ridden by personality */
+ mddev->barriers_work = 1;
+
+ if (start_readonly)
+ mddev->ro = 2; /* read-only, but switch on first write */
/* before we start the array running, initialise the bitmap */
err = bitmap_create(mddev);
bitmap_destroy(mddev);
return err;
}
+ if (mddev->pers->sync_request)
+ sysfs_create_group(&mddev->kobj, &md_redundancy_group);
+ else if (mddev->ro == 2) /* auto-readonly not meaningful */
+ mddev->ro = 0;
+
atomic_set(&mddev->writes_pending,0);
mddev->safemode = 0;
mddev->safemode_timer.function = md_safemode_timeout;
mddev->safemode_timer.data = (unsigned long) mddev;
mddev->safemode_delay = (20 * HZ)/1000 +1; /* 20 msec delay */
mddev->in_sync = 1;
+
+ ITERATE_RDEV(mddev,rdev,tmp)
+ if (rdev->raid_disk >= 0) {
+ char nm[20];
+ sprintf(nm, "rd%d", rdev->raid_disk);
+ sysfs_create_link(&mddev->kobj, &rdev->kobj, nm);
+ }
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
md_wakeup_thread(mddev->thread);
if (ro) {
err = -ENXIO;
- if (mddev->ro)
+ if (mddev->ro==1)
goto out;
mddev->ro = 1;
} else {
bitmap_flush(mddev);
- wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0);
+ md_super_wait(mddev);
if (mddev->ro)
set_disk_ro(disk, 0);
blk_queue_make_request(mddev->queue, md_fail_request);
mddev->pers->stop(mddev);
+ if (mddev->pers->sync_request)
+ sysfs_remove_group(&mddev->kobj, &md_redundancy_group);
+
module_put(mddev->pers->owner);
mddev->pers = NULL;
if (mddev->ro)
* Free resources if final stop
*/
if (!ro) {
+ mdk_rdev_t *rdev;
+ struct list_head *tmp;
struct gendisk *disk;
printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));
+ ITERATE_RDEV(mddev,rdev,tmp)
+ if (rdev->raid_disk >= 0) {
+ char nm[20];
+ sprintf(nm, "rd%d", rdev->raid_disk);
+ sysfs_remove_link(&mddev->kobj, nm);
+ }
+
export_array(mddev);
mddev->array_size = 0;
return err;
}
- if (start_rdev->faulty) {
+ if (test_bit(Faulty, &start_rdev->flags)) {
printk(KERN_WARNING
"md: can not autostart based on faulty %s!\n",
bdevname(start_rdev->bdev,b));
nr=working=active=failed=spare=0;
ITERATE_RDEV(mddev,rdev,tmp) {
nr++;
- if (rdev->faulty)
+ if (test_bit(Faulty, &rdev->flags))
failed++;
else {
working++;
- if (rdev->in_sync)
+ if (test_bit(In_sync, &rdev->flags))
active++;
else
spare++;
info.minor = MINOR(rdev->bdev->bd_dev);
info.raid_disk = rdev->raid_disk;
info.state = 0;
- if (rdev->faulty)
+ if (test_bit(Faulty, &rdev->flags))
info.state |= (1<<MD_DISK_FAULTY);
- else if (rdev->in_sync) {
+ else if (test_bit(In_sync, &rdev->flags)) {
info.state |= (1<<MD_DISK_ACTIVE);
info.state |= (1<<MD_DISK_SYNC);
}
validate_super(mddev, rdev);
rdev->saved_raid_disk = rdev->raid_disk;
- rdev->in_sync = 0; /* just to be sure */
+ clear_bit(In_sync, &rdev->flags); /* just to be sure */
if (info->state & (1<<MD_DISK_WRITEMOSTLY))
set_bit(WriteMostly, &rdev->flags);
else
rdev->raid_disk = -1;
- rdev->faulty = 0;
+ rdev->flags = 0;
+
if (rdev->raid_disk < mddev->raid_disks)
- rdev->in_sync = (info->state & (1<<MD_DISK_SYNC));
- else
- rdev->in_sync = 0;
+ if (info->state & (1<<MD_DISK_SYNC))
+ set_bit(In_sync, &rdev->flags);
if (info->state & (1<<MD_DISK_WRITEMOSTLY))
set_bit(WriteMostly, &rdev->flags);
goto abort_export;
}
- if (rdev->faulty) {
+ if (test_bit(Faulty, &rdev->flags)) {
printk(KERN_WARNING
"md: can not hot-add faulty %s disk to %s!\n",
bdevname(rdev->bdev,b), mdname(mddev));
err = -EINVAL;
goto abort_export;
}
- rdev->in_sync = 0;
+ clear_bit(In_sync, &rdev->flags);
rdev->desc_nr = -1;
bind_rdev_to_array(rdev, mddev);
mddev->sb_dirty = 1;
+ mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
+ mddev->bitmap_offset = 0;
+
/*
* Generate a 128 bit UUID
*/
if (cnt > 0 ) {
printk(KERN_WARNING
"md: %s(pid %d) used deprecated START_ARRAY ioctl. "
- "This will not be supported beyond 2.6\n",
+ "This will not be supported beyond July 2006\n",
current->comm, current->pid);
cnt--;
}
/*
* The remaining ioctls are changing the state of the
- * superblock, so we do not allow read-only arrays
- * here:
+ * superblock, so we do not allow them on read-only arrays.
+ * However non-MD ioctls (e.g. get-size) will still come through
+ * here and hit the 'default' below, so only disallow
+ * 'md' ioctls, and switch to rw mode if started auto-readonly.
*/
- if (mddev->ro) {
- err = -EROFS;
- goto abort_unlock;
+ if (_IOC_TYPE(cmd) == MD_MAJOR &&
+ mddev->ro && mddev->pers) {
+ if (mddev->ro == 2) {
+ mddev->ro = 0;
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ md_wakeup_thread(mddev->thread);
+
+ } else {
+ err = -EROFS;
+ goto abort_unlock;
+ }
}
switch (cmd)
*/
allow_signal(SIGKILL);
- complete(thread->event);
while (!kthread_should_stop()) {
- void (*run)(mddev_t *);
- wait_event_interruptible_timeout(thread->wqueue,
- test_bit(THREAD_WAKEUP, &thread->flags)
- || kthread_should_stop(),
- thread->timeout);
+ /* We need to wait INTERRUPTIBLE so that
+ * we don't add to the load-average.
+ * That means we need to be sure no signals are
+ * pending
+ */
+ if (signal_pending(current))
+ flush_signals(current);
+
+ wait_event_interruptible_timeout
+ (thread->wqueue,
+ test_bit(THREAD_WAKEUP, &thread->flags)
+ || kthread_should_stop(),
+ thread->timeout);
try_to_freeze();
clear_bit(THREAD_WAKEUP, &thread->flags);
- run = thread->run;
- if (run)
- run(thread->mddev);
+ thread->run(thread->mddev);
}
return 0;
const char *name)
{
mdk_thread_t *thread;
- struct completion event;
thread = kmalloc(sizeof(mdk_thread_t), GFP_KERNEL);
if (!thread)
memset(thread, 0, sizeof(mdk_thread_t));
init_waitqueue_head(&thread->wqueue);
- init_completion(&event);
- thread->event = &event;
thread->run = run;
thread->mddev = mddev;
- thread->name = name;
thread->timeout = MAX_SCHEDULE_TIMEOUT;
thread->tsk = kthread_run(md_thread, thread, name, mdname(thread->mddev));
if (IS_ERR(thread->tsk)) {
kfree(thread);
return NULL;
}
- wait_for_completion(&event);
return thread;
}
return;
}
- if (!rdev || rdev->faulty)
+ if (!rdev || test_bit(Faulty, &rdev->flags))
return;
/*
dprintk("md_error dev:%s, rdev:(%d:%d), (caller: %p,%p,%p,%p).\n",
seq_printf(seq, "%s : %sactive", mdname(mddev),
mddev->pers ? "" : "in");
if (mddev->pers) {
- if (mddev->ro)
+ if (mddev->ro==1)
seq_printf(seq, " (read-only)");
+ if (mddev->ro==2)
+ seq_printf(seq, "(auto-read-only)");
seq_printf(seq, " %s", mddev->pers->name);
}
bdevname(rdev->bdev,b), rdev->desc_nr);
if (test_bit(WriteMostly, &rdev->flags))
seq_printf(seq, "(W)");
- if (rdev->faulty) {
+ if (test_bit(Faulty, &rdev->flags)) {
seq_printf(seq, "(F)");
continue;
} else if (rdev->raid_disk < 0)
if (mddev->pers) {
mddev->pers->status (seq, mddev);
seq_printf(seq, "\n ");
- if (mddev->curr_resync > 2) {
- status_resync (seq, mddev);
- seq_printf(seq, "\n ");
- } else if (mddev->curr_resync == 1 || mddev->curr_resync == 2)
- seq_printf(seq, " resync=DELAYED\n ");
+ if (mddev->pers->sync_request) {
+ if (mddev->curr_resync > 2) {
+ status_resync (seq, mddev);
+ seq_printf(seq, "\n ");
+ } else if (mddev->curr_resync == 1 || mddev->curr_resync == 2)
+ seq_printf(seq, "\tresync=DELAYED\n ");
+ else if (mddev->recovery_cp < MaxSector)
+ seq_printf(seq, "\tresync=PENDING\n ");
+ }
} else
seq_printf(seq, "\n ");
curr_events = disk_stat_read(disk, sectors[0]) +
disk_stat_read(disk, sectors[1]) -
atomic_read(&disk->sync_io);
- /* Allow some slack between valud of curr_events and last_events,
- * as there are some uninteresting races.
+ /* The difference between curr_events and last_events
+ * will be affected by any new non-sync IO (making
+ * curr_events bigger) and any difference in the amount of
+ * in-flight syncio (making current_events bigger or smaller)
+ * The amount in-flight is currently limited to
+ * 32*64K in raid1/10 and 256*PAGE_SIZE in raid5/6
+ * which is at most 4096 sectors.
+ * These numbers are fairly fragile and should be made
+ * more robust, probably by enforcing the
+ * 'window size' that md_do_sync sort-of uses.
+ *
* Note: the following is an unsigned comparison.
*/
- if ((curr_events - rdev->last_events + 32) > 64) {
+ if ((curr_events - rdev->last_events + 4096) > 8192) {
rdev->last_events = curr_events;
idle = 0;
}
if (bio_data_dir(bi) != WRITE)
return;
+ BUG_ON(mddev->ro == 1);
+ if (mddev->ro == 2) {
+ /* need to switch to read/write */
+ mddev->ro = 0;
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ md_wakeup_thread(mddev->thread);
+ }
atomic_inc(&mddev->writes_pending);
if (mddev->in_sync) {
- spin_lock(&mddev->write_lock);
+ spin_lock_irq(&mddev->write_lock);
if (mddev->in_sync) {
mddev->in_sync = 0;
mddev->sb_dirty = 1;
md_wakeup_thread(mddev->thread);
}
- spin_unlock(&mddev->write_lock);
+ spin_unlock_irq(&mddev->write_lock);
}
wait_event(mddev->sb_wait, mddev->sb_dirty==0);
}
mddev->curr_resync = 2;
try_again:
- if (signal_pending(current) ||
- kthread_should_stop()) {
- flush_signals(current);
+ if (kthread_should_stop()) {
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
goto skip;
}
* time 'round when curr_resync == 2
*/
continue;
- prepare_to_wait(&resync_wait, &wq, TASK_INTERRUPTIBLE);
- if (!signal_pending(current) &&
- !kthread_should_stop() &&
+ prepare_to_wait(&resync_wait, &wq, TASK_UNINTERRUPTIBLE);
+ if (!kthread_should_stop() &&
mddev2->curr_resync >= mddev->curr_resync) {
printk(KERN_INFO "md: delaying resync of %s"
" until %s has finished resync (they"
}
} while (mddev->curr_resync < 2);
- if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
+ if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
/* resync follows the size requested by the personality,
* which defaults to physical size, but can be virtual size
*/
max_sectors = mddev->resync_max_sectors;
- else
+ mddev->resync_mismatches = 0;
+ } else
/* recovery follows the physical size of devices */
max_sectors = mddev->size << 1;
is_mddev_idle(mddev); /* this also initializes IO event counters */
/* we don't use the checkpoint if there's a bitmap */
- if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && !mddev->bitmap)
+ if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) && !mddev->bitmap
+ && ! test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
j = mddev->recovery_cp;
else
j = 0;
}
- if (signal_pending(current) || kthread_should_stop()) {
+ if (kthread_should_stop()) {
/*
* got a signal, exit.
*/
printk(KERN_INFO
"md: md_do_sync() got signal ... exiting\n");
- flush_signals(current);
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
goto out;
}
if (currspeed > sysctl_speed_limit_min) {
if ((currspeed > sysctl_speed_limit_max) ||
!is_mddev_idle(mddev)) {
- msleep_interruptible(250);
+ msleep(500);
goto repeat;
}
}
if (mddev_trylock(mddev)==0) {
int spares =0;
- spin_lock(&mddev->write_lock);
+ spin_lock_irq(&mddev->write_lock);
if (mddev->safemode && !atomic_read(&mddev->writes_pending) &&
!mddev->in_sync && mddev->recovery_cp == MaxSector) {
mddev->in_sync = 1;
}
if (mddev->safemode == 1)
mddev->safemode = 0;
- spin_unlock(&mddev->write_lock);
+ spin_unlock_irq(&mddev->write_lock);
if (mddev->sb_dirty)
md_update_sb(mddev);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
goto unlock;
}
- if (mddev->recovery)
- /* probably just the RECOVERY_NEEDED flag */
- mddev->recovery = 0;
+ /* Clear some bits that don't mean anything, but
+ * might be left set
+ */
+ clear_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ clear_bit(MD_RECOVERY_ERR, &mddev->recovery);
+ clear_bit(MD_RECOVERY_INTR, &mddev->recovery);
+ clear_bit(MD_RECOVERY_DONE, &mddev->recovery);
/* no recovery is running.
* remove any failed drives, then
*/
ITERATE_RDEV(mddev,rdev,rtmp)
if (rdev->raid_disk >= 0 &&
- (rdev->faulty || ! rdev->in_sync) &&
+ (test_bit(Faulty, &rdev->flags) || ! test_bit(In_sync, &rdev->flags)) &&
atomic_read(&rdev->nr_pending)==0) {
- if (mddev->pers->hot_remove_disk(mddev, rdev->raid_disk)==0)
+ if (mddev->pers->hot_remove_disk(mddev, rdev->raid_disk)==0) {
+ char nm[20];
+ sprintf(nm,"rd%d", rdev->raid_disk);
+ sysfs_remove_link(&mddev->kobj, nm);
rdev->raid_disk = -1;
+ }
}
if (mddev->degraded) {
ITERATE_RDEV(mddev,rdev,rtmp)
if (rdev->raid_disk < 0
- && !rdev->faulty) {
- if (mddev->pers->hot_add_disk(mddev,rdev))
+ && !test_bit(Faulty, &rdev->flags)) {
+ if (mddev->pers->hot_add_disk(mddev,rdev)) {
+ char nm[20];
+ sprintf(nm, "rd%d", rdev->raid_disk);
+ sysfs_create_link(&mddev->kobj, &rdev->kobj, nm);
spares++;
- else
+ } else
break;
}
}
- if (!spares && (mddev->recovery_cp == MaxSector )) {
- /* nothing we can do ... */
+ if (spares) {
+ clear_bit(MD_RECOVERY_SYNC, &mddev->recovery);
+ clear_bit(MD_RECOVERY_CHECK, &mddev->recovery);
+ } else if (mddev->recovery_cp < MaxSector) {
+ set_bit(MD_RECOVERY_SYNC, &mddev->recovery);
+ } else if (!test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
+ /* nothing to be done ... */
goto unlock;
- }
+
if (mddev->pers->sync_request) {
set_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
- if (!spares)
- set_bit(MD_RECOVERY_SYNC, &mddev->recovery);
if (spares && mddev->bitmap && ! mddev->bitmap->file) {
/* We are adding a device or devices to an array
* which has the bitmap stored on all devices.
" MD_SB_DISKS=%d\n",
MD_MAJOR_VERSION, MD_MINOR_VERSION,
MD_PATCHLEVEL_VERSION, MAX_MD_DEVS, MD_SB_DISKS);
- printk(KERN_INFO "md: bitmap version %d.%d\n", BITMAP_MAJOR,
+ printk(KERN_INFO "md: bitmap version %d.%d\n", BITMAP_MAJOR_HI,
BITMAP_MINOR);
if (register_blkdev(MAJOR_NR, "md"))
if (IS_ERR(rdev))
continue;
- if (rdev->faulty) {
+ if (test_bit(Faulty, &rdev->flags)) {
MD_BUG();
continue;
}
module_init(md_init)
module_exit(md_exit)
+static int get_ro(char *buffer, struct kernel_param *kp)
+{
+ return sprintf(buffer, "%d", start_readonly);
+}
+static int set_ro(const char *val, struct kernel_param *kp)
+{
+ char *e;
+ int num = simple_strtoul(val, &e, 10);
+ if (*val && (*e == '\0' || *e == '\n')) {
+ start_readonly = num;
+ return 0;;
+ }
+ return -EINVAL;
+}
+
+module_param_call(start_ro, set_ro, get_ro, NULL, 0600);
+
EXPORT_SYMBOL(register_md_personality);
EXPORT_SYMBOL(unregister_md_personality);
EXPORT_SYMBOL(md_error);
projects / powerpc.git / blobdiff