From 7e97332ea9caad3b7c6d86bc3b982e17eda2f736 Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Wed, 25 Jan 2017 18:16:22 +0100 Subject: [PATCH] rbd: support for data-pool feature Add support for RBD_FEATURE_DATA_POOL feature. rbd_dev->layout.pool_id now stores the data pool id. Signed-off-by: Ilya Dryomov Reviewed-by: Jason Dillaman --- drivers/block/rbd.c | 33 +++++++++++++++++++++++++++++++-- 1 file changed, 31 insertions(+), 2 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index e7131c7..ceac787 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -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; -- 2.7.4