diff options
| -rw-r--r-- | drivers/md/dm.c | 56 |
1 files changed, 29 insertions, 27 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index e9e74e6274d4..a712fd73a55f 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -556,17 +556,17 @@ static int dm_blk_getgeo(struct block_device *bdev, struct hd_geometry *geo) return dm_get_geometry(md, geo); } -static int dm_get_live_table_for_ioctl(struct mapped_device *md, - struct block_device **bdev, - fmode_t *mode, int *srcu_idx) +static int dm_grab_bdev_for_ioctl(struct mapped_device *md, + struct block_device **bdev, + fmode_t *mode) { struct dm_target *tgt; struct dm_table *map; - int r; + int srcu_idx, r; retry: r = -ENOTTY; - map = dm_get_live_table(md, srcu_idx); + map = dm_get_live_table(md, &srcu_idx); if (!map || !dm_table_get_size(map)) goto out; @@ -587,10 +587,12 @@ retry: if (r < 0) goto out; + bdgrab(*bdev); + dm_put_live_table(md, srcu_idx); return r; out: - dm_put_live_table(md, *srcu_idx); + dm_put_live_table(md, srcu_idx); if (r == -ENOTCONN && !fatal_signal_pending(current)) { msleep(10); goto retry; @@ -602,9 +604,9 @@ static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, unsigned long arg) { struct mapped_device *md = bdev->bd_disk->private_data; - int srcu_idx, r; + int r; - r = dm_get_live_table_for_ioctl(md, &bdev, &mode, &srcu_idx); + r = dm_grab_bdev_for_ioctl(md, &bdev, &mode); if (r < 0) return r; @@ -621,7 +623,7 @@ static int dm_blk_ioctl(struct block_device *bdev, fmode_t mode, r = __blkdev_driver_ioctl(bdev, mode, cmd, arg); out: - dm_put_live_table(md, srcu_idx); + bdput(bdev); return r; } @@ -3552,14 +3554,14 @@ void dm_free_md_mempools(struct dm_md_mempools *pools) } static int dm_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, - u32 flags) + u32 flags) { struct mapped_device *md = bdev->bd_disk->private_data; const struct pr_ops *ops; fmode_t mode; - int srcu_idx, r; + int r; - r = dm_get_live_table_for_ioctl(md, &bdev, &mode, &srcu_idx); + r = dm_grab_bdev_for_ioctl(md, &bdev, &mode); if (r < 0) return r; @@ -3569,19 +3571,19 @@ static int dm_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, else r = -EOPNOTSUPP; - dm_put_live_table(md, srcu_idx); + bdput(bdev); return r; } static int dm_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, - u32 flags) + u32 flags) { struct mapped_device *md = bdev->bd_disk->private_data; const struct pr_ops *ops; fmode_t mode; - int srcu_idx, r; + int r; - r = dm_get_live_table_for_ioctl(md, &bdev, &mode, &srcu_idx); + r = dm_grab_bdev_for_ioctl(md, &bdev, &mode); if (r < 0) return r; @@ -3591,7 +3593,7 @@ static int dm_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, else r = -EOPNOTSUPP; - dm_put_live_table(md, srcu_idx); + bdput(bdev); return r; } @@ -3600,9 +3602,9 @@ static int dm_pr_release(struct block_device *bdev, u64 key, enum pr_type type) struct mapped_device *md = bdev->bd_disk->private_data; const struct pr_ops *ops; fmode_t mode; - int srcu_idx, r; + int r; - r = dm_get_live_table_for_ioctl(md, &bdev, &mode, &srcu_idx); + r = dm_grab_bdev_for_ioctl(md, &bdev, &mode); if (r < 0) return r; @@ -3612,19 +3614,19 @@ static int dm_pr_release(struct block_device *bdev, u64 key, enum pr_type type) else r = -EOPNOTSUPP; - dm_put_live_table(md, srcu_idx); + bdput(bdev); return r; } static int dm_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, - enum pr_type type, bool abort) + enum pr_type type, bool abort) { struct mapped_device *md = bdev->bd_disk->private_data; const struct pr_ops *ops; fmode_t mode; - int srcu_idx, r; + int r; - r = dm_get_live_table_for_ioctl(md, &bdev, &mode, &srcu_idx); + r = dm_grab_bdev_for_ioctl(md, &bdev, &mode); if (r < 0) return r; @@ -3634,7 +3636,7 @@ static int dm_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, else r = -EOPNOTSUPP; - dm_put_live_table(md, srcu_idx); + bdput(bdev); return r; } @@ -3643,9 +3645,9 @@ static int dm_pr_clear(struct block_device *bdev, u64 key) struct mapped_device *md = bdev->bd_disk->private_data; const struct pr_ops *ops; fmode_t mode; - int srcu_idx, r; + int r; - r = dm_get_live_table_for_ioctl(md, &bdev, &mode, &srcu_idx); + r = dm_grab_bdev_for_ioctl(md, &bdev, &mode); if (r < 0) return r; @@ -3655,7 +3657,7 @@ static int dm_pr_clear(struct block_device *bdev, u64 key) else r = -EOPNOTSUPP; - dm_put_live_table(md, srcu_idx); + bdput(bdev); return r; } |