diff options
| author | Guangguan Wang <guangguan.wang@linux.alibaba.com> | 2023-08-17 21:20:31 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-08-19 12:46:53 +0100 |
| commit | 69b888e3bb4b186ec597a368bc8348e0e4bc6e65 (patch) | |
| tree | 061c699eeeaaaacc9ee06b8311edd61df9e87cc0 /net/smc/smc_clc.h | |
| parent | 7f0620b9940b3b4c5d83a815d46b97ac0b88a595 (diff) | |
net/smc: support max links per lgr negotiation in clc handshake
Support max links per lgr negotiation in clc handshake for SMCR v2.1,
which is one of smc v2.1 features. Server makes decision for the final
value of max links based on the client preferred max links and
self-preferred max links. Here use the minimum value of the client
preferred max links and server preferred max links.
Client Server
Proposal(max links(client preferred))
-------------------------------------->
Accept(max links(accepted value))
accepted value=min(client preferred, server preferred)
<-------------------------------------
Confirm(max links(accepted value))
------------------------------------->
Signed-off-by: Guangguan Wang <guangguan.wang@linux.alibaba.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Reviewed-by: Jan Karcher <jaka@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc_clc.h')
| -rw-r--r-- | net/smc/smc_clc.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/smc/smc_clc.h b/net/smc/smc_clc.h index 464b93b46047..c5c8e7db775a 100644 --- a/net/smc/smc_clc.h +++ b/net/smc/smc_clc.h @@ -47,6 +47,7 @@ #define SMC_CLC_DECL_NOUEID 0x03030008 /* peer sent no UEID */ #define SMC_CLC_DECL_RELEASEERR 0x03030009 /* release version negotiate failed */ #define SMC_CLC_DECL_MAXCONNERR 0x0303000a /* max connections negotiate failed */ +#define SMC_CLC_DECL_MAXLINKERR 0x0303000b /* max links negotiate failed */ #define SMC_CLC_DECL_MODEUNSUPP 0x03040000 /* smc modes do not match (R or D)*/ #define SMC_CLC_DECL_RMBE_EC 0x03050000 /* peer has eyecatcher in RMBE */ #define SMC_CLC_DECL_OPTUNSUPP 0x03060000 /* fastopen sockopt not supported */ @@ -136,7 +137,8 @@ struct smc_clc_v2_extension { struct smc_clnt_opts_area_hdr hdr; u8 roce[16]; /* RoCEv2 GID */ u8 max_conns; - u8 reserved[15]; + u8 max_links; + u8 reserved[14]; u8 user_eids[][SMC_MAX_EID_LEN]; }; @@ -239,7 +241,8 @@ struct smc_clc_first_contact_ext { struct smc_clc_first_contact_ext_v2x { struct smc_clc_first_contact_ext fce_v2_base; u8 max_conns; /* for SMC-R only */ - u8 reserved3[3]; + u8 max_links; /* for SMC-R only */ + u8 reserved3[2]; __be32 vendor_exp_options; u8 reserved4[8]; } __packed; /* format defined in |