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IB/core: Support for CMA multicast join flags

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Added UCMA and CMA support for multicast join flags. Flags are
passed using UCMA CM join command previously reserved fields.
Currently supporting two join flags indicating two different
multicast JoinStates:

1. Full Member:
   The initiator creates the Multicast group(MCG) if it wasn't
   previously created, can send Multicast messages to the group
   and receive messages from the MCG.

2. Send Only Full Member:
   The initiator creates the Multicast group(MCG) if it wasn't
   previously created, can send Multicast messages to the group
   but doesn't receive any messages from the MCG.

   IB: Send Only Full Member requires a query of ClassPortInfo
       to determine if SM/SA supports this option. If SM/SA
       doesn't support Send-Only there will be no join request
       sent and an error will be returned.

   ETH: When Send Only Full Member is requested no IGMP join
	will be sent.

Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed by: Hal Rosenstock <hal@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Alex Vesker
2016-07-06 16:36:35 +03:00
committed by Doug Ledford
parent 3d3fd74239
commit ab15c95a17
6 changed files with 131 additions and 25 deletions
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9
include/uapi/rdma/rdma_user_cm.h
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@@ -244,12 +244,19 @@ struct rdma_ucm_join_ip_mcast {
__u32 id;
};
/* Multicast join flags */
enum {
RDMA_MC_JOIN_FLAG_FULLMEMBER,
RDMA_MC_JOIN_FLAG_SENDONLY_FULLMEMBER,
RDMA_MC_JOIN_FLAG_RESERVED,
};
struct rdma_ucm_join_mcast {
__u64 response; /* rdma_ucma_create_id_resp */
__u64 uid;
__u32 id;
__u16 addr_size;
__u16 reserved;
__u16 join_flags;
struct sockaddr_storage addr;
};