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| author | Mark Zhang <markzhang@nvidia.com> | 2022-09-08 13:09:01 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2022-09-22 12:35:21 +0300 |
| commit | 5a3749493394276449cfc4efb417ed267edbd480 (patch) | |
| tree | c0f618e26bcf9d9aa763fa8c42daf62d2b7d5e02 /drivers/infiniband/ulp | |
| parent | bf9a9928510a03e445fa4f54bdc0b8e71f4c0067 (diff) | |
| download | linux-5a3749493394276449cfc4efb417ed267edbd480.tar.bz2 | |
RDMA/cma: Multiple path records support with netlink channel
Support receiving inbound and outbound IB path records (along with GMP
PathRecord) from user-space service through the RDMA netlink channel.
The LIDs in these 3 PRs can be used in this way:
1. GMP PR: used as the standard local/remote LIDs;
2. DLID of outbound PR: Used as the "dlid" field for outbound traffic;
3. DLID of inbound PR: Used as the "dlid" field for outbound traffic in
responder side.
This is aimed to support adaptive routing. With current IB routing
solution when a packet goes out it's assigned with a fixed DLID per
target, meaning a fixed router will be used.
The LIDs in inbound/outbound path records can be used to identify group
of routers that allow communication with another subnet's entity. With
them packets from an inter-subnet connection may travel through any
router in the set to reach the target.
As confirmed with Jason, when sending a netlink request, kernel uses
LS_RESOLVE_PATH_USE_ALL so that the service knows kernel supports
multiple PRs.
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Link: https://lore.kernel.org/r/2fa2b6c93c4c16c8915bac3cfc4f27be1d60519d.1662631201.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/ulp')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_main.c | 2 | ||||
| -rw-r--r-- | drivers/infiniband/ulp/srp/ib_srp.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c index a4904371e2db..ac25fc80fb33 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_main.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c @@ -742,7 +742,7 @@ void ipoib_flush_paths(struct net_device *dev) static void path_rec_completion(int status, struct sa_path_rec *pathrec, - void *path_ptr) + int num_prs, void *path_ptr) { struct ipoib_path *path = path_ptr; struct net_device *dev = path->dev; diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c index 9d593445d436..d01102db4fd4 100644 --- a/drivers/infiniband/ulp/srp/ib_srp.c +++ b/drivers/infiniband/ulp/srp/ib_srp.c @@ -699,7 +699,7 @@ static void srp_free_ch_ib(struct srp_target_port *target, static void srp_path_rec_completion(int status, struct sa_path_rec *pathrec, - void *ch_ptr) + int num_paths, void *ch_ptr) { struct srp_rdma_ch *ch = ch_ptr; struct srp_target_port *target = ch->target; |