if (mddev->unit == unit) {
mddev_get(mddev);
spin_unlock(&all_mddevs_lock);
- if (new)
- kfree(new);
+ kfree(new);
return mddev;
}
{
up(&mddev->reconfig_sem);
- if (mddev->thread)
- md_wakeup_thread(mddev->thread);
+ md_wakeup_thread(mddev->thread);
}
mdk_rdev_t * find_rdev_nr(mddev_t *mddev, int nr)
return NULL;
}
-inline static sector_t calc_dev_sboffset(struct block_device *bdev)
+static inline sector_t calc_dev_sboffset(struct block_device *bdev)
{
sector_t size = bdev->bd_inode->i_size >> BLOCK_SIZE_BITS;
return MD_NEW_SIZE_BLOCKS(size);
if (atomic_dec_and_test(&rdev->mddev->pending_writes))
wake_up(&rdev->mddev->sb_wait);
+ bio_put(bio);
return 0;
}
ret = 1;
abort:
- if (tmp1)
- kfree(tmp1);
- if (tmp2)
- kfree(tmp2);
-
+ kfree(tmp1);
+ kfree(tmp2);
return ret;
}
mddev->raid_disks = sb->raid_disks;
mddev->size = sb->size;
mddev->events = md_event(sb);
+ mddev->bitmap_offset = 0;
+ mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
if (sb->state & (1<<MD_SB_CLEAN))
mddev->recovery_cp = MaxSector;
printk(KERN_WARNING "md: bitmaps only support for raid1\n");
return -EINVAL;
}
- mddev->bitmap_offset = (MD_SB_BYTES >> 9);
+ mddev->bitmap_offset = mddev->default_bitmap_offset;
}
} else if (mddev->pers == NULL) {
case 0:
sb_offset = rdev->bdev->bd_inode->i_size >> 9;
sb_offset -= 8*2;
- sb_offset &= ~(4*2-1);
+ sb_offset &= ~(sector_t)(4*2-1);
/* convert from sectors to K */
sb_offset /= 2;
break;
mddev->raid_disks = le32_to_cpu(sb->raid_disks);
mddev->size = le64_to_cpu(sb->size)/2;
mddev->events = le64_to_cpu(sb->events);
+ mddev->bitmap_offset = 0;
+ mddev->default_bitmap_offset = 0;
+ if (mddev->minor_version == 0)
+ mddev->default_bitmap_offset = -(64*1024)/512;
mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
memcpy(mddev->uuid, sb->set_uuid, 16);
mddev->pers = pers[pnum];
spin_unlock(&pers_lock);
+ mddev->recovery = 0;
mddev->resync_max_sectors = mddev->size << 1; /* may be over-ridden by personality */
/* before we start the array running, initialise the bitmap */
mddev->in_sync = 1;
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ md_wakeup_thread(mddev->thread);
if (mddev->sb_dirty)
md_update_sb(mddev);
goto out;
mddev->ro = 1;
} else {
+ bitmap_flush(mddev);
+ wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0);
if (mddev->ro)
set_disk_ro(disk, 0);
blk_queue_make_request(mddev->queue, md_fail_request);
fput(mddev->bitmap_file);
mddev->bitmap_file = NULL;
}
+ mddev->bitmap_offset = 0;
/*
* Free resources if final stop
info.state = 0;
if (mddev->in_sync)
info.state = (1<<MD_SB_CLEAN);
+ if (mddev->bitmap && mddev->bitmap_offset)
+ info.state = (1<<MD_SB_BITMAP_PRESENT);
info.active_disks = active;
info.working_disks = working;
info.failed_disks = failed;
return 0;
}
-static int get_bitmap_file(mddev_t * mddev, void * arg)
+static int get_bitmap_file(mddev_t * mddev, void __user * arg)
{
mdu_bitmap_file_t *file = NULL; /* too big for stack allocation */
char *ptr, *buf = NULL;
export_rdev(rdev);
set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
- if (mddev->thread)
- md_wakeup_thread(mddev->thread);
+ md_wakeup_thread(mddev->thread);
return err;
}
{
int err;
- if (mddev->pers)
- return -EBUSY;
+ if (mddev->pers) {
+ if (!mddev->pers->quiesce)
+ return -EBUSY;
+ if (mddev->recovery || mddev->sync_thread)
+ return -EBUSY;
+ /* we should be able to change the bitmap.. */
+ }
- mddev->bitmap_file = fget(fd);
- if (mddev->bitmap_file == NULL) {
- printk(KERN_ERR "%s: error: failed to get bitmap file\n",
- mdname(mddev));
- return -EBADF;
- }
+ if (fd >= 0) {
+ if (mddev->bitmap)
+ return -EEXIST; /* cannot add when bitmap is present */
+ mddev->bitmap_file = fget(fd);
- err = deny_bitmap_write_access(mddev->bitmap_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;
- } else
+ if (mddev->bitmap_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);
+ if (err) {
+ printk(KERN_ERR "%s: error: bitmap file is already in use\n",
+ mdname(mddev));
+ fput(mddev->bitmap_file);
+ mddev->bitmap_file = NULL;
+ return err;
+ }
mddev->bitmap_offset = 0; /* file overrides offset */
+ } else if (mddev->bitmap == NULL)
+ return -ENOENT; /* cannot remove what isn't there */
+ err = 0;
+ if (mddev->pers) {
+ mddev->pers->quiesce(mddev, 1);
+ if (fd >= 0)
+ err = bitmap_create(mddev);
+ if (fd < 0 || err)
+ bitmap_destroy(mddev);
+ mddev->pers->quiesce(mddev, 0);
+ } else if (fd < 0) {
+ if (mddev->bitmap_file)
+ fput(mddev->bitmap_file);
+ mddev->bitmap_file = NULL;
+ }
+
return err;
}
{
int rv = 0;
int cnt = 0;
+ int state = 0;
+
+ /* calculate expected state,ignoring low bits */
+ if (mddev->bitmap && mddev->bitmap_offset)
+ state |= (1 << MD_SB_BITMAP_PRESENT);
if (mddev->major_version != info->major_version ||
mddev->minor_version != info->minor_version ||
mddev->level != info->level ||
/* mddev->layout != info->layout || */
!mddev->persistent != info->not_persistent||
- mddev->chunk_size != info->chunk_size )
+ mddev->chunk_size != info->chunk_size ||
+ /* 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 (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 ((state ^ info->state) & (1<<MD_SB_BITMAP_PRESENT)) {
+ if (mddev->pers->quiesce == NULL)
+ return -EINVAL;
+ if (mddev->recovery || mddev->sync_thread)
+ return -EBUSY;
+ if (info->state & (1<<MD_SB_BITMAP_PRESENT)) {
+ /* add the bitmap */
+ if (mddev->bitmap)
+ return -EEXIST;
+ if (mddev->default_bitmap_offset == 0)
+ return -EINVAL;
+ mddev->bitmap_offset = mddev->default_bitmap_offset;
+ mddev->pers->quiesce(mddev, 1);
+ rv = bitmap_create(mddev);
+ if (rv)
+ bitmap_destroy(mddev);
+ mddev->pers->quiesce(mddev, 0);
+ } else {
+ /* remove the bitmap */
+ if (!mddev->bitmap)
+ return -ENOENT;
+ if (mddev->bitmap->file)
+ return -EINVAL;
+ mddev->pers->quiesce(mddev, 1);
+ bitmap_destroy(mddev);
+ mddev->pers->quiesce(mddev, 0);
+ mddev->bitmap_offset = 0;
+ }
+ }
md_update_sb(mddev);
return rv;
}
goto done_unlock;
case GET_BITMAP_FILE:
- err = get_bitmap_file(mddev, (void *)arg);
+ err = get_bitmap_file(mddev, argp);
goto done_unlock;
case GET_DISK_INFO:
wait_event_interruptible_timeout(thread->wqueue,
test_bit(THREAD_WAKEUP, &thread->flags),
thread->timeout);
- if (current->flags & PF_FREEZE)
- refrigerator(PF_FREEZE);
+ try_to_freeze();
clear_bit(THREAD_WAKEUP, &thread->flags);
goto skip;
}
ITERATE_MDDEV(mddev2,tmp) {
- printk(".");
if (mddev2 == mddev)
continue;
if (mddev2->curr_resync &&
EXPORT_SYMBOL(md_print_devices);
EXPORT_SYMBOL(md_check_recovery);
MODULE_LICENSE("GPL");
+MODULE_ALIAS("md");
+MODULE_ALIAS_BLOCKDEV_MAJOR(MD_MAJOR);