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rbd: introduce rbd_is_snap()
Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Reviewed-by: Jason Dillaman <dillaman@redhat.com> Reviewed-by: Dongsheng Yang <dongsheng.yang@easystack.cn>
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2def865a81
commit
f3c0e45900
1 changed files with 13 additions and 8 deletions
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@ -514,6 +514,11 @@ static int minor_to_rbd_dev_id(int minor)
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return minor >> RBD_SINGLE_MAJOR_PART_SHIFT;
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}
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static bool rbd_is_snap(struct rbd_device *rbd_dev)
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{
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return rbd_dev->spec->snap_id != CEPH_NOSNAP;
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}
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static bool __rbd_is_lock_owner(struct rbd_device *rbd_dev)
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{
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lockdep_assert_held(&rbd_dev->lock_rwsem);
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@ -696,7 +701,7 @@ static int rbd_ioctl_set_ro(struct rbd_device *rbd_dev, unsigned long arg)
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return -EFAULT;
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/* Snapshots can't be marked read-write */
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if (rbd_dev->spec->snap_id != CEPH_NOSNAP && !ro)
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if (rbd_is_snap(rbd_dev) && !ro)
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return -EROFS;
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/* Let blkdev_roset() handle it */
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@ -3555,7 +3560,7 @@ static bool need_exclusive_lock(struct rbd_img_request *img_req)
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if (!(rbd_dev->header.features & RBD_FEATURE_EXCLUSIVE_LOCK))
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return false;
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if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
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if (rbd_is_snap(rbd_dev))
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return false;
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rbd_assert(!test_bit(IMG_REQ_CHILD, &img_req->flags));
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@ -4826,7 +4831,7 @@ static void rbd_queue_workfn(struct work_struct *work)
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goto err_rq;
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}
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if (op_type != OBJ_OP_READ && rbd_dev->spec->snap_id != CEPH_NOSNAP) {
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if (op_type != OBJ_OP_READ && rbd_is_snap(rbd_dev)) {
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rbd_warn(rbd_dev, "%s on read-only snapshot",
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obj_op_name(op_type));
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result = -EIO;
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@ -4841,7 +4846,7 @@ static void rbd_queue_workfn(struct work_struct *work)
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*/
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if (!test_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags)) {
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dout("request for non-existent snapshot");
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rbd_assert(rbd_dev->spec->snap_id != CEPH_NOSNAP);
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rbd_assert(rbd_is_snap(rbd_dev));
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result = -ENXIO;
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goto err_rq;
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}
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@ -5084,7 +5089,7 @@ static int rbd_dev_refresh(struct rbd_device *rbd_dev)
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goto out;
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}
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if (rbd_dev->spec->snap_id == CEPH_NOSNAP) {
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if (!rbd_is_snap(rbd_dev)) {
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rbd_dev->mapping.size = rbd_dev->header.image_size;
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} else {
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/* validate mapped snapshot's EXISTS flag */
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@ -6632,7 +6637,7 @@ static int rbd_add_acquire_lock(struct rbd_device *rbd_dev)
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return -EINVAL;
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}
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if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
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if (rbd_is_snap(rbd_dev))
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return 0;
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rbd_assert(!rbd_is_lock_owner(rbd_dev));
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@ -7003,7 +7008,7 @@ static int rbd_dev_image_probe(struct rbd_device *rbd_dev, int depth)
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if (ret)
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goto err_out_probe;
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if (rbd_dev->spec->snap_id != CEPH_NOSNAP &&
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if (rbd_is_snap(rbd_dev) &&
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(rbd_dev->header.features & RBD_FEATURE_OBJECT_MAP)) {
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ret = rbd_object_map_load(rbd_dev);
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if (ret)
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@ -7093,7 +7098,7 @@ static ssize_t do_rbd_add(struct bus_type *bus,
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}
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/* If we are mapping a snapshot it must be marked read-only */
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if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
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if (rbd_is_snap(rbd_dev))
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rbd_dev->opts->read_only = true;
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if (rbd_dev->opts->alloc_size > rbd_dev->layout.object_size) {
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