diff options
Diffstat (limited to 'drivers/block/rbd.c')
| -rw-r--r-- | drivers/block/rbd.c | 55 |
1 files changed, 47 insertions, 8 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index b64125d1d7bd..f11b839166ef 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -268,7 +268,8 @@ static void rbd_put_dev(struct rbd_device *rbd_dev) put_device(&rbd_dev->dev); } -static int rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver); +static int rbd_dev_refresh(struct rbd_device *rbd_dev, u64 *hver); +static int rbd_dev_v2_refresh(struct rbd_device *rbd_dev, u64 *hver); static int rbd_open(struct block_device *bdev, fmode_t mode) { @@ -1304,7 +1305,7 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) dout("rbd_watch_cb %s notify_id=%llu opcode=%u\n", rbd_dev->header_name, (unsigned long long) notify_id, (unsigned int) opcode); - rc = rbd_refresh_header(rbd_dev, &hver); + rc = rbd_dev_refresh(rbd_dev, &hver); if (rc) pr_warning(RBD_DRV_NAME "%d got notification but failed to " " update snaps: %d\n", rbd_dev->major, rc); @@ -1732,7 +1733,7 @@ static void rbd_update_mapping_size(struct rbd_device *rbd_dev) /* * only read the first part of the ondisk header, without the snaps info */ -static int __rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) +static int rbd_dev_v1_refresh(struct rbd_device *rbd_dev, u64 *hver) { int ret; struct rbd_image_header h; @@ -1773,12 +1774,16 @@ static int __rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) return ret; } -static int rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) +static int rbd_dev_refresh(struct rbd_device *rbd_dev, u64 *hver) { int ret; + rbd_assert(rbd_image_format_valid(rbd_dev->image_format)); mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - ret = __rbd_refresh_header(rbd_dev, hver); + if (rbd_dev->image_format == 1) + ret = rbd_dev_v1_refresh(rbd_dev, hver); + else + ret = rbd_dev_v2_refresh(rbd_dev, hver); mutex_unlock(&ctl_mutex); return ret; @@ -1938,7 +1943,7 @@ static ssize_t rbd_image_refresh(struct device *dev, struct rbd_device *rbd_dev = dev_to_rbd_dev(dev); int ret; - ret = rbd_refresh_header(rbd_dev, NULL); + ret = rbd_dev_refresh(rbd_dev, NULL); return ret < 0 ? ret : size; } @@ -2402,6 +2407,41 @@ static char *rbd_dev_snap_info(struct rbd_device *rbd_dev, u32 which, return ERR_PTR(-EINVAL); } +static int rbd_dev_v2_refresh(struct rbd_device *rbd_dev, u64 *hver) +{ + int ret; + __u8 obj_order; + + down_write(&rbd_dev->header_rwsem); + + /* Grab old order first, to see if it changes */ + + obj_order = rbd_dev->header.obj_order, + ret = rbd_dev_v2_image_size(rbd_dev); + if (ret) + goto out; + if (rbd_dev->header.obj_order != obj_order) { + ret = -EIO; + goto out; + } + rbd_update_mapping_size(rbd_dev); + + ret = rbd_dev_v2_snap_context(rbd_dev, hver); + dout("rbd_dev_v2_snap_context returned %d\n", ret); + if (ret) + goto out; + ret = rbd_dev_snaps_update(rbd_dev); + dout("rbd_dev_snaps_update returned %d\n", ret); + if (ret) + goto out; + ret = rbd_dev_snaps_register(rbd_dev); + dout("rbd_dev_snaps_register returned %d\n", ret); +out: + up_write(&rbd_dev->header_rwsem); + + return ret; +} + /* * Scan the rbd device's current snapshot list and compare it to the * newly-received snapshot context. Remove any existing snapshots @@ -2564,7 +2604,7 @@ static int rbd_init_watch_dev(struct rbd_device *rbd_dev) do { ret = rbd_req_sync_watch(rbd_dev); if (ret == -ERANGE) { - rc = rbd_refresh_header(rbd_dev, NULL); + rc = rbd_dev_refresh(rbd_dev, NULL); if (rc < 0) return rc; } @@ -3045,7 +3085,6 @@ static ssize_t rbd_add(struct bus_type *bus, rc = rbd_dev_probe(rbd_dev); if (rc < 0) goto err_out_client; - rbd_assert(rbd_image_format_valid(rbd_dev->image_format)); /* no need to lock here, as rbd_dev is not registered yet */ rc = rbd_dev_snaps_update(rbd_dev); |