*/
#include <linux/kthread.h>
-#include <linux/raid/md.h>
-#include <linux/raid/bitmap.h>
+#include <linux/blkdev.h>
#include <linux/sysctl.h>
+#include <linux/seq_file.h>
#include <linux/buffer_head.h> /* for invalidate_bdev */
#include <linux/poll.h>
#include <linux/ctype.h>
#include <linux/random.h>
#include <linux/reboot.h>
#include <linux/file.h>
+#include <linux/compat.h>
#include <linux/delay.h>
-
-#define MAJOR_NR MD_MAJOR
-
-/* 63 partitions with the alternate major number (mdp) */
-#define MdpMinorShift 6
+#include <linux/raid/md_p.h>
+#include <linux/raid/md_u.h>
+#include "md.h"
+#include "bitmap.h"
#define DEBUG 0
#define dprintk(x...) ((void)(DEBUG && printk(x)))
#define MD_BUG(x...) { printk("md: bug in file %s, line %d\n", __FILE__, __LINE__); md_print_devices(); }
+/*
+ * Default number of read corrections we'll attempt on an rdev
+ * before ejecting it from the array. We divide the read error
+ * count by 2 for every hour elapsed between read errors.
+ */
+#define MD_DEFAULT_MAX_CORRECTED_READ_ERRORS 20
/*
* Current RAID-1,4,5 parallel reconstruction 'guaranteed speed limit'
* is 1000 KB/sec, so the extra system load does not show up that much.
static ctl_table raid_table[] = {
{
- .ctl_name = DEV_RAID_SPEED_LIMIT_MIN,
.procname = "speed_limit_min",
.data = &sysctl_speed_limit_min,
.maxlen = sizeof(int),
.mode = S_IRUGO|S_IWUSR,
- .proc_handler = &proc_dointvec,
+ .proc_handler = proc_dointvec,
},
{
- .ctl_name = DEV_RAID_SPEED_LIMIT_MAX,
.procname = "speed_limit_max",
.data = &sysctl_speed_limit_max,
.maxlen = sizeof(int),
.mode = S_IRUGO|S_IWUSR,
- .proc_handler = &proc_dointvec,
+ .proc_handler = proc_dointvec,
},
- { .ctl_name = 0 }
+ { }
};
static ctl_table raid_dir_table[] = {
{
- .ctl_name = DEV_RAID,
.procname = "raid",
.maxlen = 0,
.mode = S_IRUGO|S_IXUGO,
.child = raid_table,
},
- { .ctl_name = 0 }
+ { }
};
static ctl_table raid_root_table[] = {
{
- .ctl_name = CTL_DEV,
.procname = "dev",
.maxlen = 0,
.mode = 0555,
.child = raid_dir_table,
},
- { .ctl_name = 0 }
+ { }
};
-static struct block_device_operations md_fops;
+static const struct block_device_operations md_fops;
static int start_readonly;
)
-static int md_fail_request(struct request_queue *q, struct bio *bio)
+/* Rather than calling directly into the personality make_request function,
+ * IO requests come here first so that we can check if the device is
+ * being suspended pending a reconfiguration.
+ * We hold a refcount over the call to ->make_request. By the time that
+ * call has finished, the bio has been linked into some internal structure
+ * and so is visible to ->quiesce(), so we don't need the refcount any more.
+ */
+static int md_make_request(struct request_queue *q, struct bio *bio)
{
- bio_io_error(bio);
- return 0;
+ mddev_t *mddev = q->queuedata;
+ int rv;
+ if (mddev == NULL || mddev->pers == NULL) {
+ bio_io_error(bio);
+ return 0;
+ }
+ rcu_read_lock();
+ if (mddev->suspended || mddev->barrier) {
+ DEFINE_WAIT(__wait);
+ for (;;) {
+ prepare_to_wait(&mddev->sb_wait, &__wait,
+ TASK_UNINTERRUPTIBLE);
+ if (!mddev->suspended && !mddev->barrier)
+ break;
+ rcu_read_unlock();
+ schedule();
+ rcu_read_lock();
+ }
+ finish_wait(&mddev->sb_wait, &__wait);
+ }
+ atomic_inc(&mddev->active_io);
+ rcu_read_unlock();
+ rv = mddev->pers->make_request(q, bio);
+ if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended)
+ wake_up(&mddev->sb_wait);
+
+ return rv;
+}
+
+static void mddev_suspend(mddev_t *mddev)
+{
+ BUG_ON(mddev->suspended);
+ mddev->suspended = 1;
+ synchronize_rcu();
+ wait_event(mddev->sb_wait, atomic_read(&mddev->active_io) == 0);
+ mddev->pers->quiesce(mddev, 1);
+ md_unregister_thread(mddev->thread);
+ mddev->thread = NULL;
+ /* we now know that no code is executing in the personality module,
+ * except possibly the tail end of a ->bi_end_io function, but that
+ * is certain to complete before the module has a chance to get
+ * unloaded
+ */
+}
+
+static void mddev_resume(mddev_t *mddev)
+{
+ mddev->suspended = 0;
+ wake_up(&mddev->sb_wait);
+ mddev->pers->quiesce(mddev, 0);
+}
+
+int mddev_congested(mddev_t *mddev, int bits)
+{
+ if (mddev->barrier)
+ return 1;
+ return mddev->suspended;
+}
+EXPORT_SYMBOL(mddev_congested);
+
+/*
+ * Generic barrier handling for md
+ */
+
+#define POST_REQUEST_BARRIER ((void*)1)
+
+static void md_end_barrier(struct bio *bio, int err)
+{
+ mdk_rdev_t *rdev = bio->bi_private;
+ mddev_t *mddev = rdev->mddev;
+ if (err == -EOPNOTSUPP && mddev->barrier != POST_REQUEST_BARRIER)
+ set_bit(BIO_EOPNOTSUPP, &mddev->barrier->bi_flags);
+
+ rdev_dec_pending(rdev, mddev);
+
+ if (atomic_dec_and_test(&mddev->flush_pending)) {
+ if (mddev->barrier == POST_REQUEST_BARRIER) {
+ /* This was a post-request barrier */
+ mddev->barrier = NULL;
+ wake_up(&mddev->sb_wait);
+ } else
+ /* The pre-request barrier has finished */
+ schedule_work(&mddev->barrier_work);
+ }
+ bio_put(bio);
+}
+
+static void submit_barriers(mddev_t *mddev)
+{
+ mdk_rdev_t *rdev;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(rdev, &mddev->disks, same_set)
+ if (rdev->raid_disk >= 0 &&
+ !test_bit(Faulty, &rdev->flags)) {
+ /* Take two references, one is dropped
+ * when request finishes, one after
+ * we reclaim rcu_read_lock
+ */
+ struct bio *bi;
+ atomic_inc(&rdev->nr_pending);
+ atomic_inc(&rdev->nr_pending);
+ rcu_read_unlock();
+ bi = bio_alloc(GFP_KERNEL, 0);
+ bi->bi_end_io = md_end_barrier;
+ bi->bi_private = rdev;
+ bi->bi_bdev = rdev->bdev;
+ atomic_inc(&mddev->flush_pending);
+ submit_bio(WRITE_BARRIER, bi);
+ rcu_read_lock();
+ rdev_dec_pending(rdev, mddev);
+ }
+ rcu_read_unlock();
}
+static void md_submit_barrier(struct work_struct *ws)
+{
+ mddev_t *mddev = container_of(ws, mddev_t, barrier_work);
+ struct bio *bio = mddev->barrier;
+
+ atomic_set(&mddev->flush_pending, 1);
+
+ if (test_bit(BIO_EOPNOTSUPP, &bio->bi_flags))
+ bio_endio(bio, -EOPNOTSUPP);
+ else if (bio->bi_size == 0)
+ /* an empty barrier - all done */
+ bio_endio(bio, 0);
+ else {
+ bio->bi_rw &= ~(1<<BIO_RW_BARRIER);
+ if (mddev->pers->make_request(mddev->queue, bio))
+ generic_make_request(bio);
+ mddev->barrier = POST_REQUEST_BARRIER;
+ submit_barriers(mddev);
+ }
+ if (atomic_dec_and_test(&mddev->flush_pending)) {
+ mddev->barrier = NULL;
+ wake_up(&mddev->sb_wait);
+ }
+}
+
+void md_barrier_request(mddev_t *mddev, struct bio *bio)
+{
+ spin_lock_irq(&mddev->write_lock);
+ wait_event_lock_irq(mddev->sb_wait,
+ !mddev->barrier,
+ mddev->write_lock, /*nothing*/);
+ mddev->barrier = bio;
+ spin_unlock_irq(&mddev->write_lock);
+
+ atomic_set(&mddev->flush_pending, 1);
+ INIT_WORK(&mddev->barrier_work, md_submit_barrier);
+
+ submit_barriers(mddev);
+
+ if (atomic_dec_and_test(&mddev->flush_pending))
+ schedule_work(&mddev->barrier_work);
+}
+EXPORT_SYMBOL(md_barrier_request);
+
static inline mddev_t *mddev_get(mddev_t *mddev)
{
atomic_inc(&mddev->active);
return mddev;
}
-static void mddev_delayed_delete(struct work_struct *ws)
-{
- mddev_t *mddev = container_of(ws, mddev_t, del_work);
- kobject_del(&mddev->kobj);
- kobject_put(&mddev->kobj);
-}
+static void mddev_delayed_delete(struct work_struct *ws);
static void mddev_put(mddev_t *mddev)
{
else
new->md_minor = MINOR(unit) >> MdpMinorShift;
+ mutex_init(&new->open_mutex);
mutex_init(&new->reconfig_mutex);
+ mutex_init(&new->bitmap_info.mutex);
INIT_LIST_HEAD(&new->disks);
INIT_LIST_HEAD(&new->all_mddevs);
init_timer(&new->safemode_timer);
atomic_set(&new->active, 1);
atomic_set(&new->openers, 0);
+ atomic_set(&new->active_io, 0);
spin_lock_init(&new->write_lock);
+ atomic_set(&new->flush_pending, 0);
init_waitqueue_head(&new->sb_wait);
init_waitqueue_head(&new->recovery_wait);
new->reshape_position = MaxSector;
return mutex_lock_interruptible(&mddev->reconfig_mutex);
}
+static inline int mddev_is_locked(mddev_t *mddev)
+{
+ return mutex_is_locked(&mddev->reconfig_mutex);
+}
+
static inline int mddev_trylock(mddev_t * mddev)
{
return mutex_trylock(&mddev->reconfig_mutex);
return MD_NEW_SIZE_SECTORS(num_sectors);
}
-static sector_t calc_num_sectors(mdk_rdev_t *rdev, unsigned chunk_size)
-{
- sector_t num_sectors = rdev->sb_start;
-
- if (chunk_size)
- num_sectors &= ~((sector_t)chunk_size/512 - 1);
- return num_sectors;
-}
-
static int alloc_disk_sb(mdk_rdev_t * rdev)
{
if (rdev->sb_page)
rdev->sb_loaded = 0;
rdev->sb_page = NULL;
rdev->sb_start = 0;
- rdev->size = 0;
+ rdev->sectors = 0;
}
}
sector_t num_sectors);
};
+/*
+ * Check that the given mddev has no bitmap.
+ *
+ * This function is called from the run method of all personalities that do not
+ * support bitmaps. It prints an error message and returns non-zero if mddev
+ * has a bitmap. Otherwise, it returns 0.
+ *
+ */
+int md_check_no_bitmap(mddev_t *mddev)
+{
+ if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset)
+ return 0;
+ printk(KERN_ERR "%s: bitmaps are not supported for %s\n",
+ mdname(mddev), mddev->pers->name);
+ return 1;
+}
+EXPORT_SYMBOL(md_check_no_bitmap);
+
/*
* load_super for 0.90.0
*/
rdev->data_offset = 0;
rdev->sb_size = MD_SB_BYTES;
- if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) {
- if (sb->level != 1 && sb->level != 4
- && sb->level != 5 && sb->level != 6
- && sb->level != 10) {
- /* FIXME use a better test */
- printk(KERN_WARNING
- "md: bitmaps not supported for this level.\n");
- goto abort;
- }
- }
-
if (sb->level == LEVEL_MULTIPATH)
rdev->desc_nr = -1;
else
else
ret = 0;
}
- rdev->size = calc_num_sectors(rdev, sb->chunk_size) / 2;
+ rdev->sectors = rdev->sb_start;
- if (rdev->size < sb->size && sb->level > 1)
+ if (rdev->sectors < sb->size * 2 && sb->level > 1)
/* "this cannot possibly happen" ... */
ret = -EINVAL;
mddev->minor_version = sb->minor_version;
mddev->patch_version = sb->patch_version;
mddev->external = 0;
- mddev->chunk_size = sb->chunk_size;
+ mddev->chunk_sectors = sb->chunk_size >> 9;
mddev->ctime = sb->ctime;
mddev->utime = sb->utime;
mddev->level = sb->level;
mddev->clevel[0] = 0;
mddev->layout = sb->layout;
mddev->raid_disks = sb->raid_disks;
- mddev->size = sb->size;
+ mddev->dev_sectors = sb->size * 2;
mddev->events = ev1;
- mddev->bitmap_offset = 0;
- mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
+ mddev->bitmap_info.offset = 0;
+ mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
if (mddev->minor_version >= 91) {
mddev->reshape_position = sb->reshape_position;
mddev->delta_disks = sb->delta_disks;
mddev->new_level = sb->new_level;
mddev->new_layout = sb->new_layout;
- mddev->new_chunk = sb->new_chunk;
+ mddev->new_chunk_sectors = sb->new_chunk >> 9;
} else {
mddev->reshape_position = MaxSector;
mddev->delta_disks = 0;
mddev->new_level = mddev->level;
mddev->new_layout = mddev->layout;
- mddev->new_chunk = mddev->chunk_size;
+ mddev->new_chunk_sectors = mddev->chunk_sectors;
}
if (sb->state & (1<<MD_SB_CLEAN))
mddev->max_disks = MD_SB_DISKS;
if (sb->state & (1<<MD_SB_BITMAP_PRESENT) &&
- mddev->bitmap_file == NULL)
- mddev->bitmap_offset = mddev->default_bitmap_offset;
+ mddev->bitmap_info.file == NULL)
+ mddev->bitmap_info.offset =
+ mddev->bitmap_info.default_offset;
} else if (mddev->pers == NULL) {
/* Insist on good event counter while assembling */
desc->raid_disk < mddev->raid_disks */) {
set_bit(In_sync, &rdev->flags);
rdev->raid_disk = desc->raid_disk;
+ } else if (desc->state & (1<<MD_DISK_ACTIVE)) {
+ /* active but not in sync implies recovery up to
+ * reshape position. We don't know exactly where
+ * that is, so set to zero for now */
+ if (mddev->minor_version >= 91) {
+ rdev->recovery_offset = 0;
+ rdev->raid_disk = desc->raid_disk;
+ }
}
if (desc->state & (1<<MD_DISK_WRITEMOSTLY))
set_bit(WriteMostly, &rdev->flags);
sb->ctime = mddev->ctime;
sb->level = mddev->level;
- sb->size = mddev->size;
+ sb->size = mddev->dev_sectors / 2;
sb->raid_disks = mddev->raid_disks;
sb->md_minor = mddev->md_minor;
sb->not_persistent = 0;
sb->new_level = mddev->new_level;
sb->delta_disks = mddev->delta_disks;
sb->new_layout = mddev->new_layout;
- sb->new_chunk = mddev->new_chunk;
+ sb->new_chunk = mddev->new_chunk_sectors << 9;
}
mddev->minor_version = sb->minor_version;
if (mddev->in_sync)
sb->recovery_cp = 0;
sb->layout = mddev->layout;
- sb->chunk_size = mddev->chunk_size;
+ sb->chunk_size = mddev->chunk_sectors << 9;
- if (mddev->bitmap && mddev->bitmap_file == NULL)
+ if (mddev->bitmap && mddev->bitmap_info.file == NULL)
sb->state |= (1<<MD_SB_BITMAP_PRESENT);
sb->disks[0].state = (1<<MD_DISK_REMOVED);
list_for_each_entry(rdev2, &mddev->disks, same_set) {
mdp_disk_t *d;
int desc_nr;
- if (rdev2->raid_disk >= 0 && test_bit(In_sync, &rdev2->flags)
- && !test_bit(Faulty, &rdev2->flags))
+ int is_active = test_bit(In_sync, &rdev2->flags);
+
+ if (rdev2->raid_disk >= 0 &&
+ sb->minor_version >= 91)
+ /* we have nowhere to store the recovery_offset,
+ * but if it is not below the reshape_position,
+ * we can piggy-back on that.
+ */
+ is_active = 1;
+ if (rdev2->raid_disk < 0 ||
+ test_bit(Faulty, &rdev2->flags))
+ is_active = 0;
+ if (is_active)
desc_nr = rdev2->raid_disk;
else
desc_nr = next_spare++;
d->number = rdev2->desc_nr;
d->major = MAJOR(rdev2->bdev->bd_dev);
d->minor = MINOR(rdev2->bdev->bd_dev);
- if (rdev2->raid_disk >= 0 && test_bit(In_sync, &rdev2->flags)
- && !test_bit(Faulty, &rdev2->flags))
+ if (is_active)
d->raid_disk = rdev2->raid_disk;
else
d->raid_disk = rdev2->desc_nr; /* compatibility */
if (test_bit(Faulty, &rdev2->flags))
d->state = (1<<MD_DISK_FAULTY);
- else if (test_bit(In_sync, &rdev2->flags)) {
+ else if (is_active) {
d->state = (1<<MD_DISK_ACTIVE);
- d->state |= (1<<MD_DISK_SYNC);
+ if (test_bit(In_sync, &rdev2->flags))
+ d->state |= (1<<MD_DISK_SYNC);
active++;
working++;
} else {
static unsigned long long
super_90_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
{
- if (num_sectors && num_sectors < rdev->mddev->size * 2)
+ if (num_sectors && num_sectors < rdev->mddev->dev_sectors)
return 0; /* component must fit device */
- if (rdev->mddev->bitmap_offset)
+ if (rdev->mddev->bitmap_info.offset)
return 0; /* can't move bitmap */
rdev->sb_start = calc_dev_sboffset(rdev->bdev);
if (!num_sectors || num_sectors > rdev->sb_start)
bdevname(rdev->bdev,b));
return -EINVAL;
}
- if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) {
- if (sb->level != cpu_to_le32(1) &&
- sb->level != cpu_to_le32(4) &&
- sb->level != cpu_to_le32(5) &&
- sb->level != cpu_to_le32(6) &&
- sb->level != cpu_to_le32(10)) {
- printk(KERN_WARNING
- "md: bitmaps not supported for this level.\n");
- return -EINVAL;
- }
- }
rdev->preferred_minor = 0xffff;
rdev->data_offset = le64_to_cpu(sb->data_offset);
atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read));
rdev->sb_size = le32_to_cpu(sb->max_dev) * 2 + 256;
- bmask = queue_hardsect_size(rdev->bdev->bd_disk->queue)-1;
+ bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1;
if (rdev->sb_size & bmask)
rdev->sb_size = (rdev->sb_size | bmask) + 1;
ret = 0;
}
if (minor_version)
- rdev->size = ((rdev->bdev->bd_inode->i_size>>9) - le64_to_cpu(sb->data_offset)) / 2;
+ rdev->sectors = (rdev->bdev->bd_inode->i_size >> 9) -
+ le64_to_cpu(sb->data_offset);
else
- rdev->size = rdev->sb_start / 2;
- if (rdev->size < le64_to_cpu(sb->data_size)/2)
+ rdev->sectors = rdev->sb_start;
+ if (rdev->sectors < le64_to_cpu(sb->data_size))
return -EINVAL;
- rdev->size = le64_to_cpu(sb->data_size)/2;
- if (le32_to_cpu(sb->chunksize))
- rdev->size &= ~((sector_t)le32_to_cpu(sb->chunksize)/2 - 1);
-
- if (le64_to_cpu(sb->size) > rdev->size*2)
+ rdev->sectors = le64_to_cpu(sb->data_size);
+ if (le64_to_cpu(sb->size) > rdev->sectors)
return -EINVAL;
return ret;
}
mddev->major_version = 1;
mddev->patch_version = 0;
mddev->external = 0;
- mddev->chunk_size = le32_to_cpu(sb->chunksize) << 9;
+ mddev->chunk_sectors = le32_to_cpu(sb->chunksize);
mddev->ctime = le64_to_cpu(sb->ctime) & ((1ULL << 32)-1);
mddev->utime = le64_to_cpu(sb->utime) & ((1ULL << 32)-1);
mddev->level = le32_to_cpu(sb->level);
mddev->clevel[0] = 0;
mddev->layout = le32_to_cpu(sb->layout);
mddev->raid_disks = le32_to_cpu(sb->raid_disks);
- mddev->size = le64_to_cpu(sb->size)/2;
+ mddev->dev_sectors = le64_to_cpu(sb->size);
mddev->events = ev1;
- mddev->bitmap_offset = 0;
- mddev->default_bitmap_offset = 1024 >> 9;
+ mddev->bitmap_info.offset = 0;
+ mddev->bitmap_info.default_offset = 1024 >> 9;
mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
memcpy(mddev->uuid, sb->set_uuid, 16);
mddev->max_disks = (4096-256)/2;
if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) &&
- mddev->bitmap_file == NULL )
- mddev->bitmap_offset = (__s32)le32_to_cpu(sb->bitmap_offset);
+ mddev->bitmap_info.file == NULL )
+ mddev->bitmap_info.offset =
+ (__s32)le32_to_cpu(sb->bitmap_offset);
if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) {
mddev->reshape_position = le64_to_cpu(sb->reshape_position);
mddev->delta_disks = le32_to_cpu(sb->delta_disks);
mddev->new_level = le32_to_cpu(sb->new_level);
mddev->new_layout = le32_to_cpu(sb->new_layout);
- mddev->new_chunk = le32_to_cpu(sb->new_chunk)<<9;
+ mddev->new_chunk_sectors = le32_to_cpu(sb->new_chunk);
} else {
mddev->reshape_position = MaxSector;
mddev->delta_disks = 0;
mddev->new_level = mddev->level;
mddev->new_layout = mddev->layout;
- mddev->new_chunk = mddev->chunk_size;
+ mddev->new_chunk_sectors = mddev->chunk_sectors;
}
} else if (mddev->pers == NULL) {
}
if (mddev->level != LEVEL_MULTIPATH) {
int role;
- role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]);
+ if (rdev->desc_nr < 0 ||
+ rdev->desc_nr >= le32_to_cpu(sb->max_dev)) {
+ role = 0xffff;
+ rdev->desc_nr = -1;
+ } else
+ role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]);
switch(role) {
case 0xffff: /* spare */
break;
sb->cnt_corrected_read = cpu_to_le32(atomic_read(&rdev->corrected_errors));
sb->raid_disks = cpu_to_le32(mddev->raid_disks);
- sb->size = cpu_to_le64(mddev->size<<1);
+ sb->size = cpu_to_le64(mddev->dev_sectors);
+ sb->chunksize = cpu_to_le32(mddev->chunk_sectors);
+ sb->level = cpu_to_le32(mddev->level);
+ sb->layout = cpu_to_le32(mddev->layout);
- if (mddev->bitmap && mddev->bitmap_file == NULL) {
- sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset);
+ if (mddev->bitmap && mddev->bitmap_info.file == NULL) {
+ sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset);
sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
}
if (rdev->raid_disk >= 0 &&
- !test_bit(In_sync, &rdev->flags) &&
- rdev->recovery_offset > 0) {
- sb->feature_map |= cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET);
- sb->recovery_offset = cpu_to_le64(rdev->recovery_offset);
+ !test_bit(In_sync, &rdev->flags)) {
+ sb->feature_map |=
+ cpu_to_le32(MD_FEATURE_RECOVERY_OFFSET);
+ sb->recovery_offset =
+ cpu_to_le64(rdev->recovery_offset);
}
if (mddev->reshape_position != MaxSector) {
sb->new_layout = cpu_to_le32(mddev->new_layout);
sb->delta_disks = cpu_to_le32(mddev->delta_disks);
sb->new_level = cpu_to_le32(mddev->new_level);
- sb->new_chunk = cpu_to_le32(mddev->new_chunk>>9);
+ sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors);
}
max_dev = 0;
if (rdev2->desc_nr+1 > max_dev)
max_dev = rdev2->desc_nr+1;
- if (max_dev > le32_to_cpu(sb->max_dev))
+ if (max_dev > le32_to_cpu(sb->max_dev)) {
+ int bmask;
sb->max_dev = cpu_to_le32(max_dev);
+ rdev->sb_size = max_dev * 2 + 256;
+ bmask = queue_logical_block_size(rdev->bdev->bd_disk->queue)-1;
+ if (rdev->sb_size & bmask)
+ rdev->sb_size = (rdev->sb_size | bmask) + 1;
+ }
for (i=0; i<max_dev;i++)
sb->dev_roles[i] = cpu_to_le16(0xfffe);
sb->dev_roles[i] = cpu_to_le16(0xfffe);
else if (test_bit(In_sync, &rdev2->flags))
sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk);
- else if (rdev2->raid_disk >= 0 && rdev2->recovery_offset > 0)
+ else if (rdev2->raid_disk >= 0)
sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk);
else
sb->dev_roles[i] = cpu_to_le16(0xffff);
{
struct mdp_superblock_1 *sb;
sector_t max_sectors;
- if (num_sectors && num_sectors < rdev->mddev->size * 2)
+ if (num_sectors && num_sectors < rdev->mddev->dev_sectors)
return 0; /* component must fit device */
if (rdev->sb_start < rdev->data_offset) {
/* minor versions 1 and 2; superblock before data */
max_sectors -= rdev->data_offset;
if (!num_sectors || num_sectors > max_sectors)
num_sectors = max_sectors;
- } else if (rdev->mddev->bitmap_offset) {
+ } else if (rdev->mddev->bitmap_info.offset) {
/* minor version 0 with bitmap we can't move */
return 0;
} else {
sector_t sb_start;
sb_start = (rdev->bdev->bd_inode->i_size >> 9) - 8*2;
sb_start &= ~(sector_t)(4*2 - 1);
- max_sectors = rdev->size * 2 + sb_start - rdev->sb_start;
+ max_sectors = rdev->sectors + sb_start - rdev->sb_start;
if (!num_sectors || num_sectors > max_sectors)
num_sectors = max_sectors;
rdev->sb_start = sb_start;
static LIST_HEAD(pending_raid_disks);
+/*
+ * Try to register data integrity profile for an mddev
+ *
+ * This is called when an array is started and after a disk has been kicked
+ * from the array. It only succeeds if all working and active component devices
+ * are integrity capable with matching profiles.
+ */
+int md_integrity_register(mddev_t *mddev)
+{
+ mdk_rdev_t *rdev, *reference = NULL;
+
+ if (list_empty(&mddev->disks))
+ return 0; /* nothing to do */
+ if (blk_get_integrity(mddev->gendisk))
+ return 0; /* already registered */
+ list_for_each_entry(rdev, &mddev->disks, same_set) {
+ /* skip spares and non-functional disks */
+ if (test_bit(Faulty, &rdev->flags))
+ continue;
+ if (rdev->raid_disk < 0)
+ continue;
+ /*
+ * If at least one rdev is not integrity capable, we can not
+ * enable data integrity for the md device.
+ */
+ if (!bdev_get_integrity(rdev->bdev))
+ return -EINVAL;
+ if (!reference) {
+ /* Use the first rdev as the reference */
+ reference = rdev;
+ continue;
+ }
+ /* does this rdev's profile match the reference profile? */
+ if (blk_integrity_compare(reference->bdev->bd_disk,
+ rdev->bdev->bd_disk) < 0)
+ return -EINVAL;
+ }
+ /*
+ * All component devices are integrity capable and have matching
+ * profiles, register the common profile for the md device.
+ */
+ if (blk_integrity_register(mddev->gendisk,
+ bdev_get_integrity(reference->bdev)) != 0) {
+ printk(KERN_ERR "md: failed to register integrity for %s\n",
+ mdname(mddev));
+ return -EINVAL;
+ }
+ printk(KERN_NOTICE "md: data integrity on %s enabled\n",
+ mdname(mddev));
+ return 0;
+}
+EXPORT_SYMBOL(md_integrity_register);
+
+/* Disable data integrity if non-capable/non-matching disk is being added */
+void md_integrity_add_rdev(mdk_rdev_t *rdev, mddev_t *mddev)
+{
+ struct blk_integrity *bi_rdev = bdev_get_integrity(rdev->bdev);
+ struct blk_integrity *bi_mddev = blk_get_integrity(mddev->gendisk);
+
+ if (!bi_mddev) /* nothing to do */
+ return;
+ if (rdev->raid_disk < 0) /* skip spares */
+ return;
+ if (bi_rdev && blk_integrity_compare(mddev->gendisk,
+ rdev->bdev->bd_disk) >= 0)
+ return;
+ printk(KERN_NOTICE "disabling data integrity on %s\n", mdname(mddev));
+ blk_integrity_unregister(mddev->gendisk);
+}
+EXPORT_SYMBOL(md_integrity_add_rdev);
+
static int bind_rdev_to_array(mdk_rdev_t * rdev, mddev_t * mddev)
{
char b[BDEVNAME_SIZE];
if (find_rdev(mddev, rdev->bdev->bd_dev))
return -EEXIST;
- /* make sure rdev->size exceeds mddev->size */
- if (rdev->size && (mddev->size == 0 || rdev->size < mddev->size)) {
+ /* make sure rdev->sectors exceeds mddev->dev_sectors */
+ if (rdev->sectors && (mddev->dev_sectors == 0 ||
+ rdev->sectors < mddev->dev_sectors)) {
if (mddev->pers) {
/* Cannot change size, so fail
* If mddev->level <= 0, then we don't care
if (mddev->level > 0)
return -ENOSPC;
} else
- mddev->size = rdev->size;
+ mddev->dev_sectors = rdev->sectors;
}
/* Verify rdev->desc_nr is unique.
/* May as well allow recovery to be retried once */
mddev->recovery_disabled = 0;
+
return 0;
fail:
__u8 *uuid;
uuid = sb->set_uuid;
- printk(KERN_INFO "md: SB: (V:%u) (F:0x%08x) Array-ID:<%02x%02x%02x%02x"
- ":%02x%02x:%02x%02x:%02x%02x:%02x%02x%02x%02x%02x%02x>\n"
- KERN_INFO "md: Name: \"%s\" CT:%llu\n",
+ printk(KERN_INFO
+ "md: SB: (V:%u) (F:0x%08x) Array-ID:<%02x%02x%02x%02x"
+ ":%02x%02x:%02x%02x:%02x%02x:%02x%02x%02x%02x%02x%02x>\n"
+ "md: Name: \"%s\" CT:%llu\n",
le32_to_cpu(sb->major_version),
le32_to_cpu(sb->feature_map),
uuid[0], uuid[1], uuid[2], uuid[3],
& MD_SUPERBLOCK_1_TIME_SEC_MASK);
uuid = sb->device_uuid;
- printk(KERN_INFO "md: L%u SZ%llu RD:%u LO:%u CS:%u DO:%llu DS:%llu SO:%llu"
+ printk(KERN_INFO
+ "md: L%u SZ%llu RD:%u LO:%u CS:%u DO:%llu DS:%llu SO:%llu"
" RO:%llu\n"
- KERN_INFO "md: Dev:%08x UUID: %02x%02x%02x%02x:%02x%02x:%02x%02x:%02x%02x"
- ":%02x%02x%02x%02x%02x%02x\n"
- KERN_INFO "md: (F:0x%08x) UT:%llu Events:%llu ResyncOffset:%llu CSUM:0x%08x\n"
- KERN_INFO "md: (MaxDev:%u) \n",
+ "md: Dev:%08x UUID: %02x%02x%02x%02x:%02x%02x:%02x%02x:%02x%02x"
+ ":%02x%02x%02x%02x%02x%02x\n"
+ "md: (F:0x%08x) UT:%llu Events:%llu ResyncOffset:%llu CSUM:0x%08x\n"
+ "md: (MaxDev:%u) \n",
le32_to_cpu(sb->level),
(unsigned long long)le64_to_cpu(sb->size),
le32_to_cpu(sb->raid_disks),
static void print_rdev(mdk_rdev_t *rdev, int major_version)
{
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,
+ printk(KERN_INFO "md: rdev %s, Sect:%08llu F:%d S:%d DN:%u\n",
+ bdevname(rdev->bdev, b), (unsigned long long)rdev->sectors,
test_bit(Faulty, &rdev->flags), test_bit(In_sync, &rdev->flags),
rdev->desc_nr);
if (rdev->sb_loaded) {
*/
mdk_rdev_t *rdev;
+ /* First make sure individual recovery_offsets are correct */
+ list_for_each_entry(rdev, &mddev->disks, same_set) {
+ if (rdev->raid_disk >= 0 &&
+ !test_bit(In_sync, &rdev->flags) &&
+ mddev->curr_resync_completed > rdev->recovery_offset)
+ rdev->recovery_offset = mddev->curr_resync_completed;
+
+ }
list_for_each_entry(rdev, &mddev->disks, same_set) {
if (rdev->sb_events == mddev->events ||
(nospares &&
int sync_req;
int nospares = 0;
+ mddev->utime = get_seconds();
if (mddev->external)
return;
repeat:
nospares = 0;
sync_req = mddev->in_sync;
- mddev->utime = get_seconds();
/* If this is just a dirty<->clean transition, and the array is clean
* and 'events' is odd, we can roll back to the previous clean state */
/* otherwise we have to go forward and ... */
mddev->events ++;
if (!mddev->in_sync || mddev->recovery_cp != MaxSector) { /* not clean */
- /* .. if the array isn't clean, insist on an odd 'events' */
- if ((mddev->events&1)==0) {
- mddev->events++;
+ /* .. if the array isn't clean, an 'even' event must also go
+ * to spares. */
+ if ((mddev->events&1)==0)
nospares = 0;
- }
} else {
- /* otherwise insist on an even 'events' (for clean states) */
- if ((mddev->events&1)) {
- mddev->events++;
+ /* otherwise an 'odd' event must go to spares */
+ if ((mddev->events&1))
nospares = 0;
- }
}
}
clear_bit(MD_CHANGE_PENDING, &mddev->flags);
spin_unlock_irq(&mddev->write_lock);
wake_up(&mddev->sb_wait);
+ if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
+ sysfs_notify(&mddev->kobj, NULL, "sync_completed");
}
* -writemostly - clears write_mostly
* blocked - sets the Blocked flag
* -blocked - clears the Blocked flag
+ * insync - sets Insync providing device isn't active
*/
int err = -EINVAL;
if (cmd_match(buf, "faulty") && rdev->mddev->pers) {
set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery);
md_wakeup_thread(rdev->mddev->thread);
+ err = 0;
+ } else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) {
+ set_bit(In_sync, &rdev->flags);
err = 0;
}
if (!err && rdev->sysfs_state)
} else if (rdev->mddev->pers) {
mdk_rdev_t *rdev2;
/* Activating a spare .. or possibly reactivating
- * if we every get bitmaps working here.
+ * if we ever get bitmaps working here.
*/
if (rdev->raid_disk != -1)
return -EINVAL;
if (rdev->mddev->pers && rdev->raid_disk >= 0)
return -EBUSY;
- if (rdev->size && rdev->mddev->external)
+ if (rdev->sectors && rdev->mddev->external)
/* Must set offset before size, so overlap checks
* can be sane */
return -EBUSY;
static ssize_t
rdev_size_show(mdk_rdev_t *rdev, char *page)
{
- return sprintf(page, "%llu\n", (unsigned long long)rdev->size);
+ return sprintf(page, "%llu\n", (unsigned long long)rdev->sectors / 2);
}
static int overlaps(sector_t s1, sector_t l1, sector_t s2, sector_t l2)
return 1;
}
+static int strict_blocks_to_sectors(const char *buf, sector_t *sectors)
+{
+ unsigned long long blocks;
+ sector_t new;
+
+ if (strict_strtoull(buf, 10, &blocks) < 0)
+ return -EINVAL;
+
+ if (blocks & 1ULL << (8 * sizeof(blocks) - 1))
+ return -EINVAL; /* sector conversion overflow */
+
+ new = blocks * 2;
+ if (new != blocks * 2)
+ return -EINVAL; /* unsigned long long to sector_t overflow */
+
+ *sectors = new;
+ return 0;
+}
+
static ssize_t
rdev_size_store(mdk_rdev_t *rdev, const char *buf, size_t len)
{
- unsigned long long size;
- unsigned long long oldsize = rdev->size;
mddev_t *my_mddev = rdev->mddev;
+ sector_t oldsectors = rdev->sectors;
+ sector_t sectors;
- if (strict_strtoull(buf, 10, &size) < 0)
+ if (strict_blocks_to_sectors(buf, §ors) < 0)
return -EINVAL;
if (my_mddev->pers && rdev->raid_disk >= 0) {
if (my_mddev->persistent) {
- size = super_types[my_mddev->major_version].
- rdev_size_change(rdev, size * 2);
- if (!size)
+ sectors = super_types[my_mddev->major_version].
+ rdev_size_change(rdev, sectors);
+ if (!sectors)
return -EBUSY;
- } else if (!size) {
- size = (rdev->bdev->bd_inode->i_size >> 10);
- size -= rdev->data_offset/2;
- }
+ } else if (!sectors)
+ sectors = (rdev->bdev->bd_inode->i_size >> 9) -
+ rdev->data_offset;
}
- if (size < my_mddev->size)
+ if (sectors < my_mddev->dev_sectors)
return -EINVAL; /* component must fit device */
- rdev->size = size;
- if (size > oldsize && my_mddev->external) {
+ rdev->sectors = sectors;
+ if (sectors > oldsectors && my_mddev->external) {
/* need to check that all other rdevs with the same ->bdev
* do not overlap. We need to unlock the mddev to avoid
- * a deadlock. We have already changed rdev->size, and if
+ * a deadlock. We have already changed rdev->sectors, and if
* we have to change it back, we will have the lock again.
*/
mddev_t *mddev;
if (test_bit(AllReserved, &rdev2->flags) ||
(rdev->bdev == rdev2->bdev &&
rdev != rdev2 &&
- overlaps(rdev->data_offset, rdev->size * 2,
+ overlaps(rdev->data_offset, rdev->sectors,
rdev2->data_offset,
- rdev2->size * 2))) {
+ rdev2->sectors))) {
overlap = 1;
break;
}
if (overlap) {
/* Someone else could have slipped in a size
* change here, but doing so is just silly.
- * We put oldsize back because we *know* it is
+ * We put oldsectors back because we *know* it is
* safe, and trust userspace not to race with
* itself
*/
- rdev->size = oldsize;
+ rdev->sectors = oldsectors;
return -EBUSY;
}
}
rdev->flags = 0;
rdev->data_offset = 0;
rdev->sb_events = 0;
+ rdev->last_read_error.tv_sec = 0;
+ rdev->last_read_error.tv_nsec = 0;
atomic_set(&rdev->nr_pending, 0);
atomic_set(&rdev->read_errors, 0);
atomic_set(&rdev->corrected_errors, 0);
rdev->desc_nr = i++;
rdev->raid_disk = rdev->desc_nr;
set_bit(In_sync, &rdev->flags);
- } else if (rdev->raid_disk >= mddev->raid_disks) {
+ } else if (rdev->raid_disk >= (mddev->raid_disks - min(0, mddev->delta_disks))) {
rdev->raid_disk = -1;
clear_bit(In_sync, &rdev->flags);
}
}
+}
-
-
- if (mddev->recovery_cp != MaxSector &&
- mddev->level >= 1)
- printk(KERN_ERR "md: %s: raid array is not clean"
- " -- starting background reconstruction\n",
- mdname(mddev));
-
+/* Read a fixed-point number.
+ * Numbers in sysfs attributes should be in "standard" units where
+ * possible, so time should be in seconds.
+ * However we internally use a a much smaller unit such as
+ * milliseconds or jiffies.
+ * This function takes a decimal number with a possible fractional
+ * component, and produces an integer which is the result of
+ * multiplying that number by 10^'scale'.
+ * all without any floating-point arithmetic.
+ */
+int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale)
+{
+ unsigned long result = 0;
+ long decimals = -1;
+ while (isdigit(*cp) || (*cp == '.' && decimals < 0)) {
+ if (*cp == '.')
+ decimals = 0;
+ else if (decimals < scale) {
+ unsigned int value;
+ value = *cp - '0';
+ result = result * 10 + value;
+ if (decimals >= 0)
+ decimals++;
+ }
+ cp++;
+ }
+ if (*cp == '\n')
+ cp++;
+ if (*cp)
+ return -EINVAL;
+ if (decimals < 0)
+ decimals = 0;
+ while (decimals < scale) {
+ result *= 10;
+ decimals ++;
+ }
+ *res = result;
+ return 0;
}
+
static void md_safemode_timeout(unsigned long data);
static ssize_t
static ssize_t
safe_delay_store(mddev_t *mddev, const char *cbuf, size_t len)
{
- int scale=1;
- int dot=0;
- int i;
unsigned long msec;
- char buf[30];
- /* remove a period, and count digits after it */
- if (len >= sizeof(buf))
+ if (strict_strtoul_scaled(cbuf, &msec, 3) < 0)
return -EINVAL;
- strlcpy(buf, cbuf, sizeof(buf));
- for (i=0; i<len; i++) {
- if (dot) {
- if (isdigit(buf[i])) {
- buf[i-1] = buf[i];
- scale *= 10;
- }
- buf[i] = 0;
- } else if (buf[i] == '.') {
- dot=1;
- buf[i] = 0;
- }
- }
- if (strict_strtoul(buf, 10, &msec) < 0)
- return -EINVAL;
- msec = (msec * 1000) / scale;
if (msec == 0)
mddev->safemode_delay = 0;
else {
static ssize_t
level_store(mddev_t *mddev, const char *buf, size_t len)
{
+ char level[16];
ssize_t rv = len;
- if (mddev->pers)
+ struct mdk_personality *pers;
+ void *priv;
+ mdk_rdev_t *rdev;
+
+ if (mddev->pers == NULL) {
+ if (len == 0)
+ return 0;
+ if (len >= sizeof(mddev->clevel))
+ return -ENOSPC;
+ strncpy(mddev->clevel, buf, len);
+ if (mddev->clevel[len-1] == '\n')
+ len--;
+ mddev->clevel[len] = 0;
+ mddev->level = LEVEL_NONE;
+ return rv;
+ }
+
+ /* request to change the personality. Need to ensure:
+ * - array is not engaged in resync/recovery/reshape
+ * - old personality can be suspended
+ * - new personality will access other array.
+ */
+
+ if (mddev->sync_thread || mddev->reshape_position != MaxSector)
return -EBUSY;
- if (len == 0)
- return 0;
- if (len >= sizeof(mddev->clevel))
- return -ENOSPC;
- strncpy(mddev->clevel, buf, len);
- if (mddev->clevel[len-1] == '\n')
+
+ if (!mddev->pers->quiesce) {
+ printk(KERN_WARNING "md: %s: %s does not support online personality change\n",
+ mdname(mddev), mddev->pers->name);
+ return -EINVAL;
+ }
+
+ /* Now find the new personality */
+ if (len == 0 || len >= sizeof(level))
+ return -EINVAL;
+ strncpy(level, buf, len);
+ if (level[len-1] == '\n')
len--;
- mddev->clevel[len] = 0;
- mddev->level = LEVEL_NONE;
+ level[len] = 0;
+
+ request_module("md-%s", level);
+ spin_lock(&pers_lock);
+ pers = find_pers(LEVEL_NONE, level);
+ if (!pers || !try_module_get(pers->owner)) {
+ spin_unlock(&pers_lock);
+ printk(KERN_WARNING "md: personality %s not loaded\n", level);
+ return -EINVAL;
+ }
+ spin_unlock(&pers_lock);
+
+ if (pers == mddev->pers) {
+ /* Nothing to do! */
+ module_put(pers->owner);
+ return rv;
+ }
+ if (!pers->takeover) {
+ module_put(pers->owner);
+ printk(KERN_WARNING "md: %s: %s does not support personality takeover\n",
+ mdname(mddev), level);
+ return -EINVAL;
+ }
+
+ /* ->takeover must set new_* and/or delta_disks
+ * if it succeeds, and may set them when it fails.
+ */
+ priv = pers->takeover(mddev);
+ if (IS_ERR(priv)) {
+ mddev->new_level = mddev->level;
+ mddev->new_layout = mddev->layout;
+ mddev->new_chunk_sectors = mddev->chunk_sectors;
+ mddev->raid_disks -= mddev->delta_disks;
+ mddev->delta_disks = 0;
+ module_put(pers->owner);
+ printk(KERN_WARNING "md: %s: %s would not accept array\n",
+ mdname(mddev), level);
+ return PTR_ERR(priv);
+ }
+
+ /* Looks like we have a winner */
+ mddev_suspend(mddev);
+ mddev->pers->stop(mddev);
+ module_put(mddev->pers->owner);
+ /* Invalidate devices that are now superfluous */
+ list_for_each_entry(rdev, &mddev->disks, same_set)
+ if (rdev->raid_disk >= mddev->raid_disks) {
+ rdev->raid_disk = -1;
+ clear_bit(In_sync, &rdev->flags);
+ }
+ mddev->pers = pers;
+ mddev->private = priv;
+ strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel));
+ mddev->level = mddev->new_level;
+ mddev->layout = mddev->new_layout;
+ mddev->chunk_sectors = mddev->new_chunk_sectors;
+ mddev->delta_disks = 0;
+ pers->run(mddev);
+ mddev_resume(mddev);
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ md_wakeup_thread(mddev->thread);
return rv;
}
if (!*buf || (*e && *e != '\n'))
return -EINVAL;
- if (mddev->pers)
- return -EBUSY;
- if (mddev->reshape_position != MaxSector)
+ if (mddev->pers) {
+ int err;
+ if (mddev->pers->check_reshape == NULL)
+ return -EBUSY;
mddev->new_layout = n;
- else
- mddev->layout = n;
+ err = mddev->pers->check_reshape(mddev);
+ if (err) {
+ mddev->new_layout = mddev->layout;
+ return err;
+ }
+ } else {
+ mddev->new_layout = n;
+ if (mddev->reshape_position == MaxSector)
+ mddev->layout = n;
+ }
return len;
}
static struct md_sysfs_entry md_layout =
chunk_size_show(mddev_t *mddev, char *page)
{
if (mddev->reshape_position != MaxSector &&
- mddev->chunk_size != mddev->new_chunk)
- return sprintf(page, "%d (%d)\n", mddev->new_chunk,
- mddev->chunk_size);
- return sprintf(page, "%d\n", mddev->chunk_size);
+ mddev->chunk_sectors != mddev->new_chunk_sectors)
+ return sprintf(page, "%d (%d)\n",
+ mddev->new_chunk_sectors << 9,
+ mddev->chunk_sectors << 9);
+ return sprintf(page, "%d\n", mddev->chunk_sectors << 9);
}
static ssize_t
chunk_size_store(mddev_t *mddev, const char *buf, size_t len)
{
- /* can only set chunk_size if array is not yet active */
char *e;
unsigned long n = simple_strtoul(buf, &e, 10);
if (!*buf || (*e && *e != '\n'))
return -EINVAL;
- if (mddev->pers)
- return -EBUSY;
- else if (mddev->reshape_position != MaxSector)
- mddev->new_chunk = n;
- else
- mddev->chunk_size = n;
+ if (mddev->pers) {
+ int err;
+ if (mddev->pers->check_reshape == NULL)
+ return -EBUSY;
+ mddev->new_chunk_sectors = n >> 9;
+ err = mddev->pers->check_reshape(mddev);
+ if (err) {
+ mddev->new_chunk_sectors = mddev->chunk_sectors;
+ return err;
+ }
+ } else {
+ mddev->new_chunk_sectors = n >> 9;
+ if (mddev->reshape_position == MaxSector)
+ mddev->chunk_sectors = n >> 9;
+ }
return len;
}
static struct md_sysfs_entry md_chunk_size =
static ssize_t
resync_start_show(mddev_t *mddev, char *page)
{
+ if (mddev->recovery_cp == MaxSector)
+ return sprintf(page, "none\n");
return sprintf(page, "%llu\n", (unsigned long long)mddev->recovery_cp);
}
else {
if (list_empty(&mddev->disks) &&
mddev->raid_disks == 0 &&
- mddev->size == 0)
+ mddev->dev_sectors == 0)
st = clear;
else
st = inactive;
} else
err = -EBUSY;
spin_unlock_irq(&mddev->write_lock);
- } else {
- mddev->ro = 0;
- mddev->recovery_cp = MaxSector;
- err = do_md_run(mddev);
- }
+ } else
+ err = -EINVAL;
break;
case active:
if (mddev->pers) {
static struct md_sysfs_entry md_array_state =
__ATTR(array_state, S_IRUGO|S_IWUSR, array_state_show, array_state_store);
+static ssize_t
+max_corrected_read_errors_show(mddev_t *mddev, char *page) {
+ return sprintf(page, "%d\n",
+ atomic_read(&mddev->max_corr_read_errors));
+}
+
+static ssize_t
+max_corrected_read_errors_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ char *e;
+ unsigned long n = simple_strtoul(buf, &e, 10);
+
+ if (*buf && (*e == 0 || *e == '\n')) {
+ atomic_set(&mddev->max_corr_read_errors, n);
+ return len;
+ }
+ return -EINVAL;
+}
+
+static struct md_sysfs_entry max_corr_read_errors =
+__ATTR(max_read_errors, S_IRUGO|S_IWUSR, max_corrected_read_errors_show,
+ max_corrected_read_errors_store);
+
static ssize_t
null_show(mddev_t *mddev, char *page)
{
static ssize_t
size_show(mddev_t *mddev, char *page)
{
- return sprintf(page, "%llu\n", (unsigned long long)mddev->size);
+ return sprintf(page, "%llu\n",
+ (unsigned long long)mddev->dev_sectors / 2);
}
static int update_size(mddev_t *mddev, sector_t num_sectors);
* not increase it (except from 0).
* If array is active, we can try an on-line resize
*/
- char *e;
- int err = 0;
- unsigned long long size = simple_strtoull(buf, &e, 10);
- if (!*buf || *buf == '\n' ||
- (*e && *e != '\n'))
- return -EINVAL;
+ sector_t sectors;
+ int err = strict_blocks_to_sectors(buf, §ors);
+ if (err < 0)
+ return err;
if (mddev->pers) {
- err = update_size(mddev, size * 2);
+ err = update_size(mddev, sectors);
md_update_sb(mddev, 1);
} else {
- if (mddev->size == 0 ||
- mddev->size > size)
- mddev->size = size;
+ if (mddev->dev_sectors == 0 ||
+ mddev->dev_sectors > sectors)
+ mddev->dev_sectors = sectors;
else
err = -ENOSPC;
}
action_show(mddev_t *mddev, char *page)
{
char *type = "idle";
- if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
+ if (test_bit(MD_RECOVERY_FROZEN, &mddev->recovery))
+ type = "frozen";
+ else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
(!mddev->ro && test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))) {
if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery))
type = "reshape";
if (!mddev->pers || !mddev->pers->sync_request)
return -EINVAL;
- if (cmd_match(page, "idle")) {
+ if (cmd_match(page, "frozen"))
+ set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+ else
+ clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+
+ if (cmd_match(page, "idle") || cmd_match(page, "frozen")) {
if (mddev->sync_thread) {
set_bit(MD_RECOVERY_INTR, &mddev->recovery);
md_unregister_thread(mddev->sync_thread);
sync_speed_show(mddev_t *mddev, char *page)
{
unsigned long resync, dt, db;
+ if (mddev->curr_resync == 0)
+ return sprintf(page, "none\n");
resync = mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active);
dt = (jiffies - mddev->resync_mark) / HZ;
if (!dt) dt++;
static ssize_t
sync_completed_show(mddev_t *mddev, char *page)
{
- unsigned long max_blocks, resync;
+ unsigned long max_sectors, resync;
+
+ if (!test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
+ return sprintf(page, "none\n");
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
- max_blocks = mddev->resync_max_sectors;
+ max_sectors = mddev->resync_max_sectors;
else
- max_blocks = mddev->size << 1;
+ max_sectors = mddev->dev_sectors;
- resync = (mddev->curr_resync - atomic_read(&mddev->recovery_active));
- return sprintf(page, "%lu / %lu\n", resync, max_blocks);
+ resync = mddev->curr_resync_completed;
+ return sprintf(page, "%lu / %lu\n", resync, max_sectors);
}
static struct md_sysfs_entry md_sync_completed = __ATTR_RO(sync_completed);
return -EBUSY;
/* Must be a multiple of chunk_size */
- if (mddev->chunk_size) {
- if (min & (sector_t)((mddev->chunk_size>>9)-1))
+ if (mddev->chunk_sectors) {
+ sector_t temp = min;
+ if (sector_div(temp, mddev->chunk_sectors))
return -EINVAL;
}
mddev->resync_min = min;
if (max < mddev->resync_min)
return -EINVAL;
if (max < mddev->resync_max &&
+ mddev->ro == 0 &&
test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
return -EBUSY;
/* Must be a multiple of chunk_size */
- if (mddev->chunk_size) {
- if (max & (sector_t)((mddev->chunk_size>>9)-1))
+ if (mddev->chunk_sectors) {
+ sector_t temp = max;
+ if (sector_div(temp, mddev->chunk_sectors))
return -EINVAL;
}
mddev->resync_max = max;
char *e;
unsigned long long new = simple_strtoull(buf, &e, 10);
- if (mddev->pers->quiesce == NULL)
+ if (mddev->pers == NULL ||
+ mddev->pers->quiesce == NULL)
return -EINVAL;
if (buf == e || (*e && *e != '\n'))
return -EINVAL;
char *e;
unsigned long long new = simple_strtoull(buf, &e, 10);
- if (mddev->pers->quiesce == NULL)
+ if (mddev->pers == NULL ||
+ mddev->pers->quiesce == NULL)
return -EINVAL;
if (buf == e || (*e && *e != '\n'))
return -EINVAL;
mddev->delta_disks = 0;
mddev->new_level = mddev->level;
mddev->new_layout = mddev->layout;
- mddev->new_chunk = mddev->chunk_size;
+ mddev->new_chunk_sectors = mddev->chunk_sectors;
return len;
}
__ATTR(reshape_position, S_IRUGO|S_IWUSR, reshape_position_show,
reshape_position_store);
+static ssize_t
+array_size_show(mddev_t *mddev, char *page)
+{
+ if (mddev->external_size)
+ return sprintf(page, "%llu\n",
+ (unsigned long long)mddev->array_sectors/2);
+ else
+ return sprintf(page, "default\n");
+}
+
+static ssize_t
+array_size_store(mddev_t *mddev, const char *buf, size_t len)
+{
+ sector_t sectors;
+
+ if (strncmp(buf, "default", 7) == 0) {
+ if (mddev->pers)
+ sectors = mddev->pers->size(mddev, 0, 0);
+ else
+ sectors = mddev->array_sectors;
+
+ mddev->external_size = 0;
+ } else {
+ if (strict_blocks_to_sectors(buf, §ors) < 0)
+ return -EINVAL;
+ if (mddev->pers && mddev->pers->size(mddev, 0, 0) < sectors)
+ return -E2BIG;
+
+ mddev->external_size = 1;
+ }
+
+ mddev->array_sectors = sectors;
+ set_capacity(mddev->gendisk, mddev->array_sectors);
+ if (mddev->pers)
+ revalidate_disk(mddev->gendisk);
+
+ return len;
+}
+
+static struct md_sysfs_entry md_array_size =
+__ATTR(array_size, S_IRUGO|S_IWUSR, array_size_show,
+ array_size_store);
static struct attribute *md_default_attrs[] = {
&md_level.attr,
&md_safe_delay.attr,
&md_array_state.attr,
&md_reshape_position.attr,
+ &md_array_size.attr,
+ &max_corr_read_errors.attr,
NULL,
};
int mdp_major = 0;
+static void mddev_delayed_delete(struct work_struct *ws)
+{
+ mddev_t *mddev = container_of(ws, mddev_t, del_work);
+
+ if (mddev->private == &md_redundancy_group) {
+ sysfs_remove_group(&mddev->kobj, &md_redundancy_group);
+ if (mddev->sysfs_action)
+ sysfs_put(mddev->sysfs_action);
+ mddev->sysfs_action = NULL;
+ mddev->private = NULL;
+ }
+ sysfs_remove_group(&mddev->kobj, &md_bitmap_group);
+ kobject_del(&mddev->kobj);
+ kobject_put(&mddev->kobj);
+}
+
static int md_alloc(dev_t dev, char *name)
{
static DEFINE_MUTEX(disks_mutex);
flush_scheduled_work();
mutex_lock(&disks_mutex);
- if (mddev->gendisk) {
- mutex_unlock(&disks_mutex);
- mddev_put(mddev);
- return -EEXIST;
- }
+ error = -EEXIST;
+ if (mddev->gendisk)
+ goto abort;
if (name) {
/* Need to ensure that 'name' is not a duplicate.
if (mddev2->gendisk &&
strcmp(mddev2->gendisk->disk_name, name) == 0) {
spin_unlock(&all_mddevs_lock);
- return -EEXIST;
+ goto abort;
}
spin_unlock(&all_mddevs_lock);
}
+ error = -ENOMEM;
mddev->queue = blk_alloc_queue(GFP_KERNEL);
- if (!mddev->queue) {
- mutex_unlock(&disks_mutex);
- mddev_put(mddev);
- return -ENOMEM;
- }
+ if (!mddev->queue)
+ goto abort;
+ mddev->queue->queuedata = mddev;
+
/* Can be unlocked because the queue is new: no concurrency */
queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, mddev->queue);
- blk_queue_make_request(mddev->queue, md_fail_request);
+ blk_queue_make_request(mddev->queue, md_make_request);
disk = alloc_disk(1 << shift);
if (!disk) {
- mutex_unlock(&disks_mutex);
blk_cleanup_queue(mddev->queue);
mddev->queue = NULL;
- mddev_put(mddev);
- return -ENOMEM;
+ goto abort;
}
disk->major = MAJOR(mddev->unit);
disk->first_minor = unit << shift;
mddev->gendisk = disk;
error = kobject_init_and_add(&mddev->kobj, &md_ktype,
&disk_to_dev(disk)->kobj, "%s", "md");
- mutex_unlock(&disks_mutex);
- if (error)
+ if (error) {
+ /* This isn't possible, but as kobject_init_and_add is marked
+ * __must_check, we must do something with the result
+ */
printk(KERN_WARNING "md: cannot register %s/md - name in use\n",
disk->disk_name);
- else {
+ error = 0;
+ }
+ if (sysfs_create_group(&mddev->kobj, &md_bitmap_group))
+ printk(KERN_DEBUG "pointless warning\n");
+ abort:
+ mutex_unlock(&disks_mutex);
+ if (!error) {
kobject_uevent(&mddev->kobj, KOBJ_ADD);
mddev->sysfs_state = sysfs_get_dirent(mddev->kobj.sd, "array_state");
}
mddev_put(mddev);
- return 0;
+ return error;
}
static struct kobject *md_probe(dev_t dev, int *part, void *data)
static int do_md_run(mddev_t * mddev)
{
int err;
- int chunk_size;
mdk_rdev_t *rdev;
struct gendisk *disk;
struct mdk_personality *pers;
- char b[BDEVNAME_SIZE];
if (list_empty(&mddev->disks))
/* cannot run an array with no devices.. */
analyze_sbs(mddev);
}
- chunk_size = mddev->chunk_size;
-
- if (chunk_size) {
- if (chunk_size > MAX_CHUNK_SIZE) {
- printk(KERN_ERR "too big chunk_size: %d > %d\n",
- chunk_size, MAX_CHUNK_SIZE);
- return -EINVAL;
- }
- /*
- * chunk-size has to be a power of 2
- */
- if ( (1 << ffz(~chunk_size)) != chunk_size) {
- printk(KERN_ERR "chunk_size of %d not valid\n", chunk_size);
- return -EINVAL;
- }
-
- /* devices must have minimum size of one chunk */
- list_for_each_entry(rdev, &mddev->disks, same_set) {
- if (test_bit(Faulty, &rdev->flags))
- continue;
- if (rdev->size < chunk_size / 1024) {
- printk(KERN_WARNING
- "md: Dev %s smaller than chunk_size:"
- " %lluk < %dk\n",
- bdevname(rdev->bdev,b),
- (unsigned long long)rdev->size,
- chunk_size / 1024);
- return -EINVAL;
- }
- }
- }
-
if (mddev->level != LEVEL_NONE)
request_module("md-level-%d", mddev->level);
else if (mddev->clevel[0])
/* perform some consistency tests on the device.
* We don't want the data to overlap the metadata,
- * Internal Bitmap issues has handled elsewhere.
+ * Internal Bitmap issues have been handled elsewhere.
*/
if (rdev->data_offset < rdev->sb_start) {
- if (mddev->size &&
- rdev->data_offset + mddev->size*2
+ if (mddev->dev_sectors &&
+ rdev->data_offset + mddev->dev_sectors
> rdev->sb_start) {
printk("md: %s: data overlaps metadata\n",
mdname(mddev));
}
mddev->pers = pers;
spin_unlock(&pers_lock);
- mddev->level = pers->level;
+ if (mddev->level != pers->level) {
+ mddev->level = pers->level;
+ mddev->new_level = pers->level;
+ }
strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel));
if (mddev->reshape_position != MaxSector &&
}
mddev->recovery = 0;
- mddev->resync_max_sectors = mddev->size << 1; /* may be over-ridden by personality */
+ /* may be over-ridden by personality */
+ mddev->resync_max_sectors = mddev->dev_sectors;
+
mddev->barriers_work = 1;
mddev->ok_start_degraded = start_dirty_degraded;
err = mddev->pers->run(mddev);
if (err)
printk(KERN_ERR "md: pers->run() failed ...\n");
- else if (mddev->pers->sync_request) {
+ else if (mddev->pers->size(mddev, 0, 0) < mddev->array_sectors) {
+ WARN_ONCE(!mddev->external_size, "%s: default size too small,"
+ " but 'external_size' not in effect?\n", __func__);
+ printk(KERN_ERR
+ "md: invalid array_size %llu > default size %llu\n",
+ (unsigned long long)mddev->array_sectors / 2,
+ (unsigned long long)mddev->pers->size(mddev, 0, 0) / 2);
+ err = -EINVAL;
+ mddev->pers->stop(mddev);
+ }
+ if (err == 0 && mddev->pers->sync_request) {
err = bitmap_create(mddev);
if (err) {
printk(KERN_ERR "%s: failed to create bitmap (%d)\n",
mddev->ro = 0;
atomic_set(&mddev->writes_pending,0);
+ atomic_set(&mddev->max_corr_read_errors,
+ MD_DEFAULT_MAX_CORRECTED_READ_ERRORS);
mddev->safemode = 0;
mddev->safemode_timer.function = md_safemode_timeout;
mddev->safemode_timer.data = (unsigned long) mddev;
set_capacity(disk, mddev->array_sectors);
- /* If we call blk_queue_make_request here, it will
- * re-initialise max_sectors etc which may have been
- * refined inside -> run. So just set the bits we need to set.
- * Most initialisation happended when we called
- * blk_queue_make_request(..., md_fail_request)
- * earlier.
- */
- mddev->queue->queuedata = mddev;
- mddev->queue->make_request_fn = mddev->pers->make_request;
-
/* If there is a partially-recovered drive we need to
* start recovery here. If we leave it to md_check_recovery,
* it will remove the drives and not do the right thing
set_bit(MD_RECOVERY_RUNNING, &mddev->recovery);
mddev->sync_thread = md_register_thread(md_do_sync,
mddev,
- "%s_resync");
+ "resync");
if (!mddev->sync_thread) {
printk(KERN_ERR "%s: could not start resync"
" thread...\n",
md_wakeup_thread(mddev->thread);
md_wakeup_thread(mddev->sync_thread); /* possibly kick off a reshape */
+ revalidate_disk(mddev->gendisk);
mddev->changed = 1;
md_new_event(mddev);
sysfs_notify_dirent(mddev->sysfs_state);
return 0;
}
-static void restore_bitmap_write_access(struct file *file)
+void restore_bitmap_write_access(struct file *file)
{
struct inode *inode = file->f_mapping->host;
{
int err = 0;
struct gendisk *disk = mddev->gendisk;
+ mdk_rdev_t *rdev;
+ mutex_lock(&mddev->open_mutex);
if (atomic_read(&mddev->openers) > is_open) {
printk("md: %s still in use.\n",mdname(mddev));
- return -EBUSY;
- }
-
- if (mddev->pers) {
+ err = -EBUSY;
+ } else if (mddev->pers) {
if (mddev->sync_thread) {
set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
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);
mddev->queue->merge_bvec_fn = NULL;
mddev->queue->unplug_fn = NULL;
mddev->queue->backing_dev_info.congested_fn = NULL;
- if (mddev->pers->sync_request) {
- sysfs_remove_group(&mddev->kobj, &md_redundancy_group);
- if (mddev->sysfs_action)
- sysfs_put(mddev->sysfs_action);
- mddev->sysfs_action = NULL;
- }
module_put(mddev->pers->owner);
+ if (mddev->pers->sync_request)
+ mddev->private = &md_redundancy_group;
mddev->pers = NULL;
/* tell userspace to handle 'inactive' */
sysfs_notify_dirent(mddev->sysfs_state);
+ list_for_each_entry(rdev, &mddev->disks, same_set)
+ if (rdev->raid_disk >= 0) {
+ char nm[20];
+ sprintf(nm, "rd%d", rdev->raid_disk);
+ sysfs_remove_link(&mddev->kobj, nm);
+ }
+
set_capacity(disk, 0);
mddev->changed = 1;
if (mode == 1)
set_disk_ro(disk, 1);
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+ err = 0;
}
-
+out:
+ mutex_unlock(&mddev->open_mutex);
+ if (err)
+ return err;
/*
* Free resources if final stop
*/
if (mode == 0) {
- mdk_rdev_t *rdev;
printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));
bitmap_destroy(mddev);
- if (mddev->bitmap_file) {
- restore_bitmap_write_access(mddev->bitmap_file);
- fput(mddev->bitmap_file);
- mddev->bitmap_file = NULL;
+ if (mddev->bitmap_info.file) {
+ restore_bitmap_write_access(mddev->bitmap_info.file);
+ fput(mddev->bitmap_info.file);
+ mddev->bitmap_info.file = NULL;
}
- mddev->bitmap_offset = 0;
-
- list_for_each_entry(rdev, &mddev->disks, same_set)
- if (rdev->raid_disk >= 0) {
- char nm[20];
- sprintf(nm, "rd%d", rdev->raid_disk);
- sysfs_remove_link(&mddev->kobj, nm);
- }
+ mddev->bitmap_info.offset = 0;
/* make sure all md_delayed_delete calls have finished */
flush_scheduled_work();
export_array(mddev);
mddev->array_sectors = 0;
- mddev->size = 0;
+ mddev->external_size = 0;
+ mddev->dev_sectors = 0;
mddev->raid_disks = 0;
mddev->recovery_cp = 0;
mddev->resync_min = 0;
mddev->flags = 0;
mddev->ro = 0;
mddev->metadata_type[0] = 0;
- mddev->chunk_size = 0;
+ mddev->chunk_sectors = 0;
mddev->ctime = mddev->utime = 0;
mddev->layout = 0;
mddev->max_disks = 0;
mddev->delta_disks = 0;
mddev->new_level = LEVEL_NONE;
mddev->new_layout = 0;
- mddev->new_chunk = 0;
+ mddev->new_chunk_sectors = 0;
mddev->curr_resync = 0;
mddev->resync_mismatches = 0;
mddev->suspend_lo = mddev->suspend_hi = 0;
mddev->degraded = 0;
mddev->barriers_work = 0;
mddev->safemode = 0;
+ mddev->bitmap_info.offset = 0;
+ mddev->bitmap_info.default_offset = 0;
+ mddev->bitmap_info.chunksize = 0;
+ mddev->bitmap_info.daemon_sleep = 0;
+ mddev->bitmap_info.max_write_behind = 0;
kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
if (mddev->hold_active == UNTIL_STOP)
mddev->hold_active = 0;
printk(KERN_INFO "md: %s switched to read-only mode.\n",
mdname(mddev));
err = 0;
+ blk_integrity_unregister(disk);
md_new_event(mddev);
sysfs_notify_dirent(mddev->sysfs_state);
-out:
return err;
}
static int get_array_info(mddev_t * mddev, void __user * arg)
{
mdu_array_info_t info;
- int nr,working,active,failed,spare;
+ int nr,working,insync,failed,spare;
mdk_rdev_t *rdev;
- nr=working=active=failed=spare=0;
+ nr=working=insync=failed=spare=0;
list_for_each_entry(rdev, &mddev->disks, same_set) {
nr++;
if (test_bit(Faulty, &rdev->flags))
else {
working++;
if (test_bit(In_sync, &rdev->flags))
- active++;
+ insync++;
else
spare++;
}
info.patch_version = MD_PATCHLEVEL_VERSION;
info.ctime = mddev->ctime;
info.level = mddev->level;
- info.size = mddev->size;
- if (info.size != mddev->size) /* overflow */
+ info.size = mddev->dev_sectors / 2;
+ if (info.size != mddev->dev_sectors / 2) /* overflow */
info.size = -1;
info.nr_disks = nr;
info.raid_disks = mddev->raid_disks;
info.state = 0;
if (mddev->in_sync)
info.state = (1<<MD_SB_CLEAN);
- if (mddev->bitmap && mddev->bitmap_offset)
+ if (mddev->bitmap && mddev->bitmap_info.offset)
info.state = (1<<MD_SB_BITMAP_PRESENT);
- info.active_disks = active;
+ info.active_disks = insync;
info.working_disks = working;
info.failed_disks = failed;
info.spare_disks = spare;
info.layout = mddev->layout;
- info.chunk_size = mddev->chunk_size;
+ info.chunk_size = mddev->chunk_sectors << 9;
if (copy_to_user(arg, &info, sizeof(info)))
return -EFAULT;
if (!list_empty(&mddev->disks)) {
mdk_rdev_t *rdev0 = list_entry(mddev->disks.next,
mdk_rdev_t, same_set);
- int err = super_types[mddev->major_version]
+ err = super_types[mddev->major_version]
.load_super(rdev, rdev0, mddev->minor_version);
if (err < 0) {
printk(KERN_WARNING
clear_bit(In_sync, &rdev->flags); /* just to be sure */
if (info->state & (1<<MD_DISK_WRITEMOSTLY))
set_bit(WriteMostly, &rdev->flags);
+ else
+ clear_bit(WriteMostly, &rdev->flags);
rdev->raid_disk = -1;
err = bind_rdev_to_array(rdev, mddev);
rdev->sb_start = rdev->bdev->bd_inode->i_size / 512;
} else
rdev->sb_start = calc_dev_sboffset(rdev->bdev);
- rdev->size = calc_num_sectors(rdev, mddev->chunk_size) / 2;
+ rdev->sectors = rdev->sb_start;
err = bind_rdev_to_array(rdev, mddev);
if (err) {
else
rdev->sb_start = rdev->bdev->bd_inode->i_size / 512;
- rdev->size = calc_num_sectors(rdev, mddev->chunk_size) / 2;
+ rdev->sectors = rdev->sb_start;
if (test_bit(Faulty, &rdev->flags)) {
printk(KERN_WARNING
if (fd >= 0) {
if (mddev->bitmap)
return -EEXIST; /* cannot add when bitmap is present */
- mddev->bitmap_file = fget(fd);
+ mddev->bitmap_info.file = fget(fd);
- if (mddev->bitmap_file == NULL) {
+ if (mddev->bitmap_info.file == NULL) {
printk(KERN_ERR "%s: error: failed to get bitmap file\n",
mdname(mddev));
return -EBADF;
}
- err = deny_bitmap_write_access(mddev->bitmap_file);
+ err = deny_bitmap_write_access(mddev->bitmap_info.file);
if (err) {
printk(KERN_ERR "%s: error: bitmap file is already in use\n",
mdname(mddev));
- fput(mddev->bitmap_file);
- mddev->bitmap_file = NULL;
+ fput(mddev->bitmap_info.file);
+ mddev->bitmap_info.file = NULL;
return err;
}
- mddev->bitmap_offset = 0; /* file overrides offset */
+ mddev->bitmap_info.offset = 0; /* file overrides offset */
} else if (mddev->bitmap == NULL)
return -ENOENT; /* cannot remove what isn't there */
err = 0;
mddev->pers->quiesce(mddev, 0);
}
if (fd < 0) {
- if (mddev->bitmap_file) {
- restore_bitmap_write_access(mddev->bitmap_file);
- fput(mddev->bitmap_file);
+ if (mddev->bitmap_info.file) {
+ restore_bitmap_write_access(mddev->bitmap_info.file);
+ fput(mddev->bitmap_info.file);
}
- mddev->bitmap_file = NULL;
+ mddev->bitmap_info.file = NULL;
}
return err;
mddev->level = info->level;
mddev->clevel[0] = 0;
- mddev->size = info->size;
+ mddev->dev_sectors = 2 * (sector_t)info->size;
mddev->raid_disks = info->raid_disks;
/* don't set md_minor, it is determined by which /dev/md* was
* openned
mddev->external = 0;
mddev->layout = info->layout;
- mddev->chunk_size = info->chunk_size;
+ mddev->chunk_sectors = info->chunk_size >> 9;
mddev->max_disks = MD_SB_DISKS;
mddev->flags = 0;
set_bit(MD_CHANGE_DEVS, &mddev->flags);
- mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
- mddev->bitmap_offset = 0;
+ mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
+ mddev->bitmap_info.offset = 0;
mddev->reshape_position = MaxSector;
get_random_bytes(mddev->uuid, 16);
mddev->new_level = mddev->level;
- mddev->new_chunk = mddev->chunk_size;
+ mddev->new_chunk_sectors = mddev->chunk_sectors;
mddev->new_layout = mddev->layout;
mddev->delta_disks = 0;
return 0;
}
+void md_set_array_sectors(mddev_t *mddev, sector_t array_sectors)
+{
+ WARN(!mddev_is_locked(mddev), "%s: unlocked mddev!\n", __func__);
+
+ if (mddev->external_size)
+ return;
+
+ mddev->array_sectors = array_sectors;
+}
+EXPORT_SYMBOL(md_set_array_sectors);
+
static int update_size(mddev_t *mddev, sector_t num_sectors)
{
mdk_rdev_t *rdev;
*/
return -EBUSY;
list_for_each_entry(rdev, &mddev->disks, same_set) {
- sector_t avail;
- avail = rdev->size * 2;
+ sector_t avail = rdev->sectors;
if (fit && (num_sectors == 0 || num_sectors > avail))
num_sectors = avail;
return -ENOSPC;
}
rv = mddev->pers->resize(mddev, num_sectors);
- if (!rv) {
- struct block_device *bdev;
-
- bdev = bdget_disk(mddev->gendisk, 0);
- if (bdev) {
- mutex_lock(&bdev->bd_inode->i_mutex);
- i_size_write(bdev->bd_inode,
- (loff_t)mddev->array_sectors << 9);
- mutex_unlock(&bdev->bd_inode->i_mutex);
- bdput(bdev);
- }
- }
+ if (!rv)
+ revalidate_disk(mddev->gendisk);
return rv;
}
int state = 0;
/* calculate expected state,ignoring low bits */
- if (mddev->bitmap && mddev->bitmap_offset)
+ if (mddev->bitmap && mddev->bitmap_info.offset)
state |= (1 << MD_SB_BITMAP_PRESENT);
if (mddev->major_version != info->major_version ||
mddev->level != info->level ||
/* mddev->layout != info->layout || */
!mddev->persistent != info->not_persistent||
- mddev->chunk_size != info->chunk_size ||
+ mddev->chunk_sectors != info->chunk_size >> 9 ||
/* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */
((state^info->state) & 0xfffffe00)
)
return -EINVAL;
/* Check there is only one change */
- if (info->size >= 0 && mddev->size != info->size) cnt++;
- if (mddev->raid_disks != info->raid_disks) cnt++;
- if (mddev->layout != info->layout) cnt++;
- if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) cnt++;
- if (cnt == 0) return 0;
- if (cnt > 1) return -EINVAL;
+ if (info->size >= 0 && mddev->dev_sectors / 2 != info->size)
+ cnt++;
+ if (mddev->raid_disks != info->raid_disks)
+ cnt++;
+ if (mddev->layout != info->layout)
+ cnt++;
+ if ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT))
+ cnt++;
+ if (cnt == 0)
+ return 0;
+ if (cnt > 1)
+ return -EINVAL;
if (mddev->layout != info->layout) {
/* Change layout
* we don't need to do anything at the md level, the
* personality will take care of it all.
*/
- if (mddev->pers->reconfig == NULL)
+ if (mddev->pers->check_reshape == NULL)
return -EINVAL;
- else
- return mddev->pers->reconfig(mddev, info->layout, -1);
+ else {
+ mddev->new_layout = info->layout;
+ rv = mddev->pers->check_reshape(mddev);
+ if (rv)
+ mddev->new_layout = mddev->layout;
+ return rv;
+ }
}
- if (info->size >= 0 && mddev->size != info->size)
+ if (info->size >= 0 && mddev->dev_sectors / 2 != info->size)
rv = update_size(mddev, (sector_t)info->size * 2);
if (mddev->raid_disks != info->raid_disks)
/* add the bitmap */
if (mddev->bitmap)
return -EEXIST;
- if (mddev->default_bitmap_offset == 0)
+ if (mddev->bitmap_info.default_offset == 0)
return -EINVAL;
- mddev->bitmap_offset = mddev->default_bitmap_offset;
+ mddev->bitmap_info.offset =
+ mddev->bitmap_info.default_offset;
mddev->pers->quiesce(mddev, 1);
rv = bitmap_create(mddev);
if (rv)
mddev->pers->quiesce(mddev, 1);
bitmap_destroy(mddev);
mddev->pers->quiesce(mddev, 0);
- mddev->bitmap_offset = 0;
+ mddev->bitmap_info.offset = 0;
}
}
md_update_sb(mddev, 1);
abort:
return err;
}
+#ifdef CONFIG_COMPAT
+static int md_compat_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case HOT_REMOVE_DISK:
+ case HOT_ADD_DISK:
+ case SET_DISK_FAULTY:
+ case SET_BITMAP_FILE:
+ /* These take in integer arg, do not convert */
+ break;
+ default:
+ arg = (unsigned long)compat_ptr(arg);
+ break;
+ }
+
+ return md_ioctl(bdev, mode, cmd, arg);
+}
+#endif /* CONFIG_COMPAT */
static int md_open(struct block_device *bdev, fmode_t mode)
{
}
BUG_ON(mddev != bdev->bd_disk->private_data);
- if ((err = mutex_lock_interruptible_nested(&mddev->reconfig_mutex, 1)))
+ if ((err = mutex_lock_interruptible(&mddev->open_mutex)))
goto out;
err = 0;
atomic_inc(&mddev->openers);
- mddev_unlock(mddev);
+ mutex_unlock(&mddev->open_mutex);
check_disk_change(bdev);
out:
mddev->changed = 0;
return 0;
}
-static struct block_device_operations md_fops =
+static const struct block_device_operations md_fops =
{
.owner = THIS_MODULE,
.open = md_open,
.release = md_release,
- .locked_ioctl = md_ioctl,
+ .ioctl = md_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = md_compat_ioctl,
+#endif
.getgeo = md_getgeo,
.media_changed = md_media_changed,
.revalidate_disk= md_revalidate,
thread->run = run;
thread->mddev = mddev;
thread->timeout = MAX_SCHEDULE_TIMEOUT;
- thread->tsk = kthread_run(md_thread, thread, name, mdname(thread->mddev));
+ thread->tsk = kthread_run(md_thread, thread,
+ "%s_%s",
+ mdname(thread->mddev),
+ name ?: mddev->pers->name);
if (IS_ERR(thread->tsk)) {
kfree(thread);
return NULL;
void md_unregister_thread(mdk_thread_t *thread)
{
+ if (!thread)
+ return;
dprintk("interrupting MD-thread pid %d\n", task_pid_nr(thread->tsk));
kthread_stop(thread->tsk);
static void status_resync(struct seq_file *seq, mddev_t * mddev)
{
- sector_t max_blocks, resync, res;
- unsigned long dt, db, rt;
+ sector_t max_sectors, resync, res;
+ unsigned long dt, db;
+ sector_t rt;
int scale;
unsigned int per_milli;
- resync = (mddev->curr_resync - atomic_read(&mddev->recovery_active))/2;
+ resync = mddev->curr_resync - atomic_read(&mddev->recovery_active);
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
- max_blocks = mddev->resync_max_sectors >> 1;
+ max_sectors = mddev->resync_max_sectors;
else
- max_blocks = mddev->size;
+ max_sectors = mddev->dev_sectors;
/*
* Should not happen.
*/
- if (!max_blocks) {
+ if (!max_sectors) {
MD_BUG();
return;
}
/* Pick 'scale' such that (resync>>scale)*1000 will fit
- * in a sector_t, and (max_blocks>>scale) will fit in a
+ * in a sector_t, and (max_sectors>>scale) will fit in a
* u32, as those are the requirements for sector_div.
* Thus 'scale' must be at least 10
*/
scale = 10;
if (sizeof(sector_t) > sizeof(unsigned long)) {
- while ( max_blocks/2 > (1ULL<<(scale+32)))
+ while ( max_sectors/2 > (1ULL<<(scale+32)))
scale++;
}
res = (resync>>scale)*1000;
- sector_div(res, (u32)((max_blocks>>scale)+1));
+ sector_div(res, (u32)((max_sectors>>scale)+1));
per_milli = res;
{
(test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ?
"resync" : "recovery"))),
per_milli/10, per_milli % 10,
- (unsigned long long) resync,
- (unsigned long long) max_blocks);
+ (unsigned long long) resync/2,
+ (unsigned long long) max_sectors/2);
/*
- * We do not want to overflow, so the order of operands and
- * the * 100 / 100 trick are important. We do a +1 to be
- * safe against division by zero. We only estimate anyway.
- *
* dt: time from mark until now
* db: blocks written from mark until now
* rt: remaining time
+ *
+ * rt is a sector_t, so could be 32bit or 64bit.
+ * So we divide before multiply in case it is 32bit and close
+ * to the limit.
+ * We scale the divisor (db) by 32 to avoid loosing precision
+ * near the end of resync when the number of remaining sectors
+ * is close to 'db'.
+ * We then divide rt by 32 after multiplying by db to compensate.
+ * The '+1' avoids division by zero if db is very small.
*/
dt = ((jiffies - mddev->resync_mark) / HZ);
if (!dt) dt++;
db = (mddev->curr_mark_cnt - atomic_read(&mddev->recovery_active))
- mddev->resync_mark_cnt;
- rt = (dt * ((unsigned long)(max_blocks-resync) / (db/2/100+1)))/100;
- seq_printf(seq, " finish=%lu.%lumin", rt / 60, (rt % 60)/6);
+ rt = max_sectors - resync; /* number of remaining sectors */
+ sector_div(rt, db/32+1);
+ rt *= dt;
+ rt >>= 5;
+
+ seq_printf(seq, " finish=%lu.%lumin", (unsigned long)rt / 60,
+ ((unsigned long)rt % 60)/6);
seq_printf(seq, " speed=%ldK/sec", db/2/dt);
}
static int md_seq_show(struct seq_file *seq, void *v)
{
mddev_t *mddev = v;
- sector_t size;
+ sector_t sectors;
mdk_rdev_t *rdev;
struct mdstat_info *mi = seq->private;
struct bitmap *bitmap;
seq_printf(seq, " %s", mddev->pers->name);
}
- size = 0;
+ sectors = 0;
list_for_each_entry(rdev, &mddev->disks, same_set) {
char b[BDEVNAME_SIZE];
seq_printf(seq, " %s[%d]",
continue;
} else if (rdev->raid_disk < 0)
seq_printf(seq, "(S)"); /* spare */
- size += rdev->size;
+ sectors += rdev->sectors;
}
if (!list_empty(&mddev->disks)) {
mddev->array_sectors / 2);
else
seq_printf(seq, "\n %llu blocks",
- (unsigned long long)size);
+ (unsigned long long)sectors / 2);
}
if (mddev->persistent) {
if (mddev->major_version != 0 ||
unsigned long chunk_kb;
unsigned long flags;
spin_lock_irqsave(&bitmap->lock, flags);
- chunk_kb = bitmap->chunksize >> 10;
+ chunk_kb = mddev->bitmap_info.chunksize >> 10;
seq_printf(seq, "bitmap: %lu/%lu pages [%luKB], "
"%lu%s chunk",
bitmap->pages - bitmap->missing_pages,
bitmap->pages,
(bitmap->pages - bitmap->missing_pages)
<< (PAGE_SHIFT - 10),
- chunk_kb ? chunk_kb : bitmap->chunksize,
+ chunk_kb ? chunk_kb : mddev->bitmap_info.chunksize,
chunk_kb ? "KB" : "B");
if (bitmap->file) {
seq_printf(seq, ", file: ");
return 0;
}
-static struct seq_operations md_seq_ops = {
+static const struct seq_operations md_seq_ops = {
.start = md_seq_start,
.next = md_seq_next,
.stop = md_seq_stop,
j = mddev->recovery_cp;
} else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery))
- max_sectors = mddev->size << 1;
+ max_sectors = mddev->dev_sectors;
else {
/* recovery follows the physical size of devices */
- max_sectors = mddev->size << 1;
+ max_sectors = mddev->dev_sectors;
j = MaxSector;
list_for_each_entry(rdev, &mddev->disks, same_set)
if (rdev->raid_disk >= 0 &&
desc, mdname(mddev));
mddev->curr_resync = j;
}
+ mddev->curr_resync_completed = mddev->curr_resync;
while (j < max_sectors) {
sector_t sectors;
skipped = 0;
- if (j >= mddev->resync_max) {
- sysfs_notify(&mddev->kobj, NULL, "sync_completed");
+
+ if (!test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
+ ((mddev->curr_resync > mddev->curr_resync_completed &&
+ (mddev->curr_resync - mddev->curr_resync_completed)
+ > (max_sectors >> 4)) ||
+ (j - mddev->curr_resync_completed)*2
+ >= mddev->resync_max - mddev->curr_resync_completed
+ )) {
+ /* time to update curr_resync_completed */
+ blk_unplug(mddev->queue);
wait_event(mddev->recovery_wait,
- mddev->resync_max > j
- || kthread_should_stop());
+ atomic_read(&mddev->recovery_active) == 0);
+ mddev->curr_resync_completed =
+ mddev->curr_resync;
+ set_bit(MD_CHANGE_CLEAN, &mddev->flags);
+ sysfs_notify(&mddev->kobj, NULL, "sync_completed");
}
+
+ while (j >= mddev->resync_max && !kthread_should_stop()) {
+ /* As this condition is controlled by user-space,
+ * we can block indefinitely, so use '_interruptible'
+ * to avoid triggering warnings.
+ */
+ flush_signals(current); /* just in case */
+ wait_event_interruptible(mddev->recovery_wait,
+ mddev->resync_max > j
+ || kthread_should_stop());
+ }
+
if (kthread_should_stop())
goto interrupted;
+
sectors = mddev->pers->sync_request(mddev, j, &skipped,
currspeed < speed_min(mddev));
if (sectors == 0) {
set_bit(MD_CHANGE_DEVS, &mddev->flags);
skip:
+ if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
+ /* We completed so min/max setting can be forgotten if used. */
+ if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
+ mddev->resync_min = 0;
+ mddev->resync_max = MaxSector;
+ } else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
+ mddev->resync_min = mddev->curr_resync_completed;
mddev->curr_resync = 0;
- mddev->resync_min = 0;
- mddev->resync_max = MaxSector;
+ if (!test_bit(MD_RECOVERY_INTR, &mddev->recovery))
+ mddev->curr_resync_completed = 0;
sysfs_notify(&mddev->kobj, NULL, "sync_completed");
wake_up(&resync_wait);
set_bit(MD_RECOVERY_DONE, &mddev->recovery);
mdk_rdev_t *rdev;
int spares = 0;
+ mddev->curr_resync_completed = 0;
+
list_for_each_entry(rdev, &mddev->disks, same_set)
if (rdev->raid_disk >= 0 &&
!test_bit(Blocked, &rdev->flags) &&
nm, mdname(mddev));
spares++;
md_new_event(mddev);
+ set_bit(MD_CHANGE_DEVS, &mddev->flags);
} else
break;
}
if (mddev->bitmap)
- bitmap_daemon_work(mddev->bitmap);
+ bitmap_daemon_work(mddev);
if (mddev->ro)
return;
sysfs_notify(&mddev->kobj, NULL,
"degraded");
}
+ if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
+ mddev->pers->finish_reshape)
+ mddev->pers->finish_reshape(mddev);
md_update_sb(mddev, 1);
/* if array is no-longer degraded, then any saved_raid_disk
*/
if (mddev->reshape_position != MaxSector) {
- if (mddev->pers->check_reshape(mddev) != 0)
+ if (mddev->pers->check_reshape == NULL ||
+ mddev->pers->check_reshape(mddev) != 0)
/* Cannot proceed */
goto unlock;
set_bit(MD_RECOVERY_RESHAPE, &mddev->recovery);
}
mddev->sync_thread = md_register_thread(md_do_sync,
mddev,
- "%s_resync");
+ "resync");
if (!mddev->sync_thread) {
printk(KERN_ERR "%s: could not start resync"
" thread...\n",
static int __init md_init(void)
{
- if (register_blkdev(MAJOR_NR, "md"))
+ if (register_blkdev(MD_MAJOR, "md"))
return -1;
if ((mdp_major=register_blkdev(0, "mdp"))<=0) {
- unregister_blkdev(MAJOR_NR, "md");
+ unregister_blkdev(MD_MAJOR, "md");
return -1;
}
- blk_register_region(MKDEV(MAJOR_NR, 0), 1UL<<MINORBITS, THIS_MODULE,
+ blk_register_region(MKDEV(MD_MAJOR, 0), 1UL<<MINORBITS, THIS_MODULE,
md_probe, NULL, NULL);
blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE,
md_probe, NULL, NULL);
mddev_t *mddev;
struct list_head *tmp;
- blk_unregister_region(MKDEV(MAJOR_NR,0), 1U << MINORBITS);
+ blk_unregister_region(MKDEV(MD_MAJOR,0), 1U << MINORBITS);
blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS);
- unregister_blkdev(MAJOR_NR,"md");
+ unregister_blkdev(MD_MAJOR,"md");
unregister_blkdev(mdp_major, "mdp");
unregister_reboot_notifier(&md_notifier);
unregister_sysctl_table(raid_table_header);
EXPORT_SYMBOL(md_wakeup_thread);
EXPORT_SYMBOL(md_check_recovery);
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MD RAID framework");
MODULE_ALIAS("md");
MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR);
Code Review / linux-2.6.git / blobdiff