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| author | Mark Zhang <markzhang@nvidia.com> | 2025-06-30 13:52:33 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2025-08-13 06:16:00 -0400 |
| commit | a6404823fe20e06d4061bc63e0295b7165af4c14 (patch) | |
| tree | 1fc4250b8749671051af9d95f7c045172377957f /include/uapi/rdma | |
| parent | a892a3e74fb4f6ef040659297603abf11ccf29a7 (diff) | |
| download | linux-a6404823fe20e06d4061bc63e0295b7165af4c14.tar.gz linux-a6404823fe20e06d4061bc63e0295b7165af4c14.tar.bz2 linux-a6404823fe20e06d4061bc63e0295b7165af4c14.zip | |
RDMA/cma: Support IB service record resolution
Add new UCMA command and the corresponding CMA implementation. Userspace
can send this command to request service resolution based on service
name or ID.
On a successful resolution, one or multiple service records are
returned, the first one will be used as destination address by default.
Two new CM events are added and returned to caller accordingly:
- RDMA_CM_EVENT_ADDRINFO_RESOLVED: Resolve succeeded;
- RDMA_CM_EVENT_ADDRINFO_ERROR: Resolve failed.
Internally two new CM states are added:
- RDMA_CM_ADDRINFO_QUERY: CM is in the process of IB service
resolution;
- RDMA_CM_ADDRINFO_RESOLVED: CM has finished the resolve process.
With these new states, beside existing state transfer processes, 2 new
processes are supported:
1. The default address is used:
RDMA_CM_ADDR_BOUND ->
RDMA_CM_ADDRINFO_QUERY ->
RDMA_CM_ADDRINFO_RESOLVED ->
RDMA_CM_ROUTE_QUERY
2. To use a different address:
RDMA_CM_ADDR_BOUND ->
RDMA_CM_ADDRINFO_QUERY->
RDMA_CM_ADDRINFO_RESOLVED ->
RDMA_CM_ADDR_QUERY ->
RDMA_CM_ADDR_RESOLVED ->
RDMA_CM_ROUTE_QUERY
In the 2nd case, resolve_addrinfo returns multiple records, a user
could call rdma_resolve_addr() with the one that is not the first.
Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Vlad Dumitrescu <vdumitrescu@nvidia.com>
Link: https://patch.msgid.link/b6e82ad75522a13b5efe4ff86da0e465aab04cc2.1751279794.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'include/uapi/rdma')
| -rw-r--r-- | include/uapi/rdma/rdma_user_cm.h | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/include/uapi/rdma/rdma_user_cm.h b/include/uapi/rdma/rdma_user_cm.h index 7cea03581f79..8799623bcba0 100644 --- a/include/uapi/rdma/rdma_user_cm.h +++ b/include/uapi/rdma/rdma_user_cm.h @@ -67,7 +67,8 @@ enum { RDMA_USER_CM_CMD_QUERY, RDMA_USER_CM_CMD_BIND, RDMA_USER_CM_CMD_RESOLVE_ADDR, - RDMA_USER_CM_CMD_JOIN_MCAST + RDMA_USER_CM_CMD_JOIN_MCAST, + RDMA_USER_CM_CMD_RESOLVE_IB_SERVICE }; /* See IBTA Annex A11, servies ID bytes 4 & 5 */ @@ -338,4 +339,21 @@ struct rdma_ucm_migrate_resp { __u32 events_reported; }; +enum { + RDMA_USER_CM_IB_SERVICE_FLAG_ID = 1 << 0, + RDMA_USER_CM_IB_SERVICE_FLAG_NAME = 1 << 1, +}; + +#define RDMA_USER_CM_IB_SERVICE_NAME_SIZE 64 +struct rdma_ucm_ib_service { + __u64 service_id; + __u8 service_name[RDMA_USER_CM_IB_SERVICE_NAME_SIZE]; + __u32 flags; + __u32 reserved; +}; + +struct rdma_ucm_resolve_ib_service { + __u32 id; + struct rdma_ucm_ib_service ibs; +}; #endif /* RDMA_USER_CM_H */ |