This moves the call to blkdev_ioctl and the argument checking to core code, and only leaves a callout to find the block device to operate on it the targets. This will simplifies the code and will allow us to pass through ioctl-like command using other methods in the next patch.
Signed-off-by: Christoph Hellwig <[email protected]> --- drivers/md/dm-flakey.c | 14 +++++++------- drivers/md/dm-linear.c | 12 ++++++------ drivers/md/dm-log-writes.c | 11 +++++------ drivers/md/dm-mpath.c | 30 +++++++++++------------------- drivers/md/dm-switch.c | 19 ++++++++----------- drivers/md/dm-verity.c | 13 ++++++------- drivers/md/dm.c | 12 +++++++++++- include/linux/device-mapper.h | 4 ++-- 8 files changed, 56 insertions(+), 59 deletions(-) diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index b257e46..ec4ebc8 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -371,20 +371,20 @@ static void flakey_status(struct dm_target *ti, status_type_t type, } } -static int flakey_ioctl(struct dm_target *ti, unsigned int cmd, unsigned long arg) +static int flakey_ioctl(struct dm_target *ti, struct block_device **bdev, + fmode_t *mode) { struct flakey_c *fc = ti->private; - struct dm_dev *dev = fc->dev; - int r = 0; + + *bdev = fc->dev->bdev; /* * Only pass ioctls through if the device sizes match exactly. */ if (fc->start || - ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT) - r = scsi_verify_blk_ioctl(NULL, cmd); - - return r ? : __blkdev_driver_ioctl(dev->bdev, dev->mode, cmd, arg); + ti->len != i_size_read((*bdev)->bd_inode) >> SECTOR_SHIFT) + return 1; + return 0; } static int flakey_merge(struct dm_target *ti, struct bvec_merge_data *bvm, diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 53e848c..d897707 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -113,21 +113,21 @@ static void linear_status(struct dm_target *ti, status_type_t type, } } -static int linear_ioctl(struct dm_target *ti, unsigned int cmd, - unsigned long arg) +static int linear_ioctl(struct dm_target *ti, struct block_device **bdev, + fmode_t *mode) { struct linear_c *lc = (struct linear_c *) ti->private; struct dm_dev *dev = lc->dev; - int r = 0; + + *bdev = dev->bdev; /* * Only pass ioctls through if the device sizes match exactly. */ if (lc->start || ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT) - r = scsi_verify_blk_ioctl(NULL, cmd); - - return r ? : __blkdev_driver_ioctl(dev->bdev, dev->mode, cmd, arg); + return 1; + return 0; } static int linear_merge(struct dm_target *ti, struct bvec_merge_data *bvm, diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c index ad1b049..811fc42 100644 --- a/drivers/md/dm-log-writes.c +++ b/drivers/md/dm-log-writes.c @@ -712,20 +712,19 @@ static void log_writes_status(struct dm_target *ti, status_type_t type, } } -static int log_writes_ioctl(struct dm_target *ti, unsigned int cmd, - unsigned long arg) +static int log_writes_ioctl(struct dm_target *ti, struct block_device **bdev, + fmode_t *mode) { struct log_writes_c *lc = ti->private; struct dm_dev *dev = lc->dev; - int r = 0; + *bdev = dev->bdev; /* * Only pass ioctls through if the device sizes match exactly. */ if (ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT) - r = scsi_verify_blk_ioctl(NULL, cmd); - - return r ? : __blkdev_driver_ioctl(dev->bdev, dev->mode, cmd, arg); + return 1; + return 0; } static int log_writes_merge(struct dm_target *ti, struct bvec_merge_data *bvm, diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index eff7bdd..8670597 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -1548,18 +1548,14 @@ out: return r; } -static int multipath_ioctl(struct dm_target *ti, unsigned int cmd, - unsigned long arg) +static int multipath_ioctl(struct dm_target *ti, + struct block_device **bdev, fmode_t *mode) { struct multipath *m = ti->private; struct pgpath *pgpath; - struct block_device *bdev; - fmode_t mode; unsigned long flags; int r; - bdev = NULL; - mode = 0; r = 0; spin_lock_irqsave(&m->lock, flags); @@ -1570,26 +1566,17 @@ static int multipath_ioctl(struct dm_target *ti, unsigned int cmd, pgpath = m->current_pgpath; if (pgpath) { - bdev = pgpath->path.dev->bdev; - mode = pgpath->path.dev->mode; + *bdev = pgpath->path.dev->bdev; + *mode = pgpath->path.dev->mode; } if ((pgpath && m->queue_io) || (!pgpath && m->queue_if_no_path)) r = -ENOTCONN; - else if (!bdev) + else if (!*bdev) r = -EIO; spin_unlock_irqrestore(&m->lock, flags); - /* - * Only pass ioctls through if the device sizes match exactly. - */ - if (!bdev || ti->len != i_size_read(bdev->bd_inode) >> SECTOR_SHIFT) { - int err = scsi_verify_blk_ioctl(NULL, cmd); - if (err) - r = err; - } - if (r == -ENOTCONN && !fatal_signal_pending(current)) { spin_lock_irqsave(&m->lock, flags); if (!m->current_pg) { @@ -1602,7 +1589,12 @@ static int multipath_ioctl(struct dm_target *ti, unsigned int cmd, dm_table_run_md_queue_async(m->ti->table); } - return r ? : __blkdev_driver_ioctl(bdev, mode, cmd, arg); + /* + * Only pass ioctls through if the device sizes match exactly. + */ + if (!r && ti->len != i_size_read((*bdev)->bd_inode) >> SECTOR_SHIFT) + return 1; + return r; } static int multipath_iterate_devices(struct dm_target *ti, diff --git a/drivers/md/dm-switch.c b/drivers/md/dm-switch.c index 50fca46..37d27e9 100644 --- a/drivers/md/dm-switch.c +++ b/drivers/md/dm-switch.c @@ -511,27 +511,24 @@ static void switch_status(struct dm_target *ti, status_type_t type, * * Passthrough all ioctls to the path for sector 0 */ -static int switch_ioctl(struct dm_target *ti, unsigned cmd, - unsigned long arg) +static int switch_ioctl(struct dm_target *ti, + struct block_device **bdev, fmode_t *mode) { struct switch_ctx *sctx = ti->private; - struct block_device *bdev; - fmode_t mode; unsigned path_nr; - int r = 0; path_nr = switch_get_path_nr(sctx, 0); - bdev = sctx->path_list[path_nr].dmdev->bdev; - mode = sctx->path_list[path_nr].dmdev->mode; + *bdev = sctx->path_list[path_nr].dmdev->bdev; + *mode = sctx->path_list[path_nr].dmdev->mode; /* * Only pass ioctls through if the device sizes match exactly. */ - if (ti->len + sctx->path_list[path_nr].start != i_size_read(bdev->bd_inode) >> SECTOR_SHIFT) - r = scsi_verify_blk_ioctl(NULL, cmd); - - return r ? : __blkdev_driver_ioctl(bdev, mode, cmd, arg); + if (ti->len + sctx->path_list[path_nr].start != + i_size_read((*bdev)->bd_inode) >> SECTOR_SHIFT) + return 1; + return 0; } static int switch_iterate_devices(struct dm_target *ti, diff --git a/drivers/md/dm-verity.c b/drivers/md/dm-verity.c index bb9c6a0..bd20c41 100644 --- a/drivers/md/dm-verity.c +++ b/drivers/md/dm-verity.c @@ -634,18 +634,17 @@ static void verity_status(struct dm_target *ti, status_type_t type, } } -static int verity_ioctl(struct dm_target *ti, unsigned cmd, - unsigned long arg) +static int verity_ioctl(struct dm_target *ti, struct block_device **bdev, + fmode_t *mode) { struct dm_verity *v = ti->private; - int r = 0; + + *bdev = v->data_dev->bdev; if (v->data_start || ti->len != i_size_read(v->data_dev->bdev->bd_inode) >> SECTOR_SHIFT) - r = scsi_verify_blk_ioctl(NULL, cmd); - - return r ? : __blkdev_driver_ioctl(v->data_dev->bdev, v->data_dev->mode, - cmd, arg); + return 1; + return 0; } static int verity_merge(struct dm_target *ti, struct bvec_merge_data *bvm, diff --git a/drivers/md/dm.c b/drivers/md/dm.c index f331d88..c68eb91 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -584,7 +584,17 @@ retry: goto out; } - r = tgt->type->ioctl(tgt, cmd, arg); + r = tgt->type->ioctl(tgt, &bdev, &mode); + if (r < 0) + goto out; + + if (r > 0) { + r = scsi_verify_blk_ioctl(NULL, cmd); + if (r) + goto out; + } + + r = __blkdev_driver_ioctl(bdev, mode, cmd, arg); out: dm_put_live_table(md, srcu_idx); diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 51cc1de..9b73138 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -79,8 +79,8 @@ typedef void (*dm_status_fn) (struct dm_target *ti, status_type_t status_type, typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv); -typedef int (*dm_ioctl_fn) (struct dm_target *ti, unsigned int cmd, - unsigned long arg); +typedef int (*dm_ioctl_fn) (struct dm_target *ti, + struct block_device **bdev, fmode_t *mode); typedef int (*dm_merge_fn) (struct dm_target *ti, struct bvec_merge_data *bvm, struct bio_vec *biovec, int max_size); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
