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rbd: support for data-pool feature

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Add support for RBD_FEATURE_DATA_POOL feature.  rbd_dev->layout.pool_id
now stores the data pool id.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>
This commit is contained in:
Ilya Dryomov 2017-01-25 18:16:22 +01:00
parent 263423f8ad
commit 7e97332ea9
1 changed files with 31 additions and 2 deletions
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33
drivers/block/rbd.c
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@ -123,9 +123,11 @@ static int atomic_dec_return_safe(atomic_t *v)
#define RBD_FEATURE_LAYERING (1<<0)
#define RBD_FEATURE_STRIPINGV2 (1<<1)
#define RBD_FEATURE_EXCLUSIVE_LOCK (1<<2)
#define RBD_FEATURE_DATA_POOL (1<<7)
#define RBD_FEATURES_ALL (RBD_FEATURE_LAYERING | \
RBD_FEATURE_STRIPINGV2 | \
RBD_FEATURE_EXCLUSIVE_LOCK)
RBD_FEATURE_EXCLUSIVE_LOCK | \
RBD_FEATURE_DATA_POOL)
/* Features supported by this (client software) implementation. */
@ -146,6 +148,7 @@ struct rbd_image_header {
__u8 obj_order;
u64 stripe_unit;
u64 stripe_count;
s64 data_pool_id;
u64 features; /* Might be changeable someday? */
/* The remaining fields need to be updated occasionally */
@ -989,7 +992,8 @@ static void rbd_init_layout(struct rbd_device *rbd_dev)
rbd_dev->layout.stripe_unit = rbd_dev->header.stripe_unit;
rbd_dev->layout.stripe_count = rbd_dev->header.stripe_count;
rbd_dev->layout.object_size = rbd_obj_bytes(&rbd_dev->header);
rbd_dev->layout.pool_id = rbd_dev->spec->pool_id;
rbd_dev->layout.pool_id = rbd_dev->header.data_pool_id == CEPH_NOPOOL ?
rbd_dev->spec->pool_id : rbd_dev->header.data_pool_id;
RCU_INIT_POINTER(rbd_dev->layout.pool_ns, NULL);
}
@ -4797,6 +4801,7 @@ static struct rbd_device *__rbd_dev_create(struct rbd_client *rbdc,
INIT_LIST_HEAD(&rbd_dev->node);
init_rwsem(&rbd_dev->header_rwsem);
rbd_dev->header.data_pool_id = CEPH_NOPOOL;
ceph_oid_init(&rbd_dev->header_oid);
rbd_dev->header_oloc.pool = spec->pool_id;
@ -5161,6 +5166,24 @@ static int rbd_dev_v2_striping_info(struct rbd_device *rbd_dev)
return 0;
}
static int rbd_dev_v2_data_pool(struct rbd_device *rbd_dev)
{
__le64 data_pool_id;
int ret;
ret = rbd_obj_method_sync(rbd_dev, &rbd_dev->header_oid,
&rbd_dev->header_oloc, "get_data_pool",
NULL, 0, &data_pool_id, sizeof(data_pool_id));
if (ret < 0)
return ret;
if (ret < sizeof(data_pool_id))
return -EBADMSG;
rbd_dev->header.data_pool_id = le64_to_cpu(data_pool_id);
WARN_ON(rbd_dev->header.data_pool_id == CEPH_NOPOOL);
return 0;
}
static char *rbd_dev_image_name(struct rbd_device *rbd_dev)
{
CEPH_DEFINE_OID_ONSTACK(oid);
@ -5858,6 +5881,12 @@ static int rbd_dev_v2_header_onetime(struct rbd_device *rbd_dev)
goto out_err;
}
if (rbd_dev->header.features & RBD_FEATURE_DATA_POOL) {
ret = rbd_dev_v2_data_pool(rbd_dev);
if (ret)
goto out_err;
}
rbd_init_layout(rbd_dev);
return 0;