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_core.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_core.h')
| -rw-r--r-- | net/smc/smc_core.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/smc/smc_core.h b/net/smc/smc_core.h index 32b199477ef3..120027d40469 100644 --- a/net/smc/smc_core.h +++ b/net/smc/smc_core.h @@ -173,6 +173,15 @@ struct smc_link { */ #define SMC_LINKS_PER_LGR_MAX 3 #define SMC_SINGLE_LINK 0 +#define SMC_LINKS_ADD_LNK_MIN 1 /* min. # of links per link group */ +#define SMC_LINKS_ADD_LNK_MAX 2 /* max. # of links per link group, also is the + * default value for smc-r v1.0 and v2.0 + */ +#define SMC_LINKS_PER_LGR_MAX_PREFER 2 /* Preferred max links per link group used for + * SMC-R v2.1 and later negotiation, vendors or + * distrubutions may modify it to a value between + * 1-2 as needed. + */ /* tx/rx buffer list element for sndbufs list and rmbs list of a lgr */ struct smc_buf_desc { @@ -342,6 +351,8 @@ struct smc_link_group { struct net *net; u8 max_conns; /* max conn can be assigned to lgr */ + u8 max_links; + /* max links can be added in lgr */ }; struct { /* SMC-D */ u64 peer_gid; @@ -387,6 +398,7 @@ struct smc_init_info { u8 smc_type_v2; u8 release_nr; u8 max_conns; + u8 max_links; u8 first_contact_peer; u8 first_contact_local; unsigned short vlan_id; |