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RDMA/ucma: Extend ucma_connect to receive ECE parameters

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Active side of CMID initiates connection through librdmacm's
rdma_connect() and kernel's ucma_connect(). Extend UCMA interface to
handle those new parameters.

Link: https://lore.kernel.org/r/20200526103304.196371-3-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Leon Romanovsky 2020-05-26 13:33:00 +03:00 committed by Jason Gunthorpe
parent fef17f91da
commit 34e2ab57a9
5 changed files with 42 additions and 3 deletions
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21
drivers/infiniband/core/cma.c
View File

@ -4036,6 +4036,27 @@ int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
}
EXPORT_SYMBOL(rdma_connect);
/**
* rdma_connect_ece - Initiate an active connection request with ECE data.
* @id: Connection identifier to connect.
* @conn_param: Connection information used for connected QPs.
* @ece: ECE parameters
*
* See rdma_connect() explanation.
*/
int rdma_connect_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
struct rdma_ucm_ece *ece)
{
struct rdma_id_private *id_priv =
container_of(id, struct rdma_id_private, id);
id_priv->ece.vendor_id = ece->vendor_id;
id_priv->ece.attr_mod = ece->attr_mod;
return rdma_connect(id, conn_param);
}
EXPORT_SYMBOL(rdma_connect_ece);
static int cma_accept_ib(struct rdma_id_private *id_priv,
struct rdma_conn_param *conn_param)
{

1
drivers/infiniband/core/cma_priv.h
View File

@ -95,6 +95,7 @@ struct rdma_id_private {
* Internal to RDMA/core, don't use in the drivers
*/
struct rdma_restrack_entry res;
struct rdma_ucm_ece ece;
};
#if IS_ENABLED(CONFIG_INFINIBAND_ADDR_TRANS_CONFIGFS)

14
drivers/infiniband/core/ucma.c
View File

@ -1072,12 +1072,15 @@ static void ucma_copy_conn_param(struct rdma_cm_id *id,
static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
int in_len, int out_len)
{
struct rdma_ucm_connect cmd;
struct rdma_conn_param conn_param;
struct rdma_ucm_ece ece = {};
struct rdma_ucm_connect cmd;
struct ucma_context *ctx;
size_t in_size;
int ret;
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
in_size = min_t(size_t, in_len, sizeof(cmd));
if (copy_from_user(&cmd, inbuf, in_size))
return -EFAULT;
if (!cmd.conn_param.valid)
@ -1088,8 +1091,13 @@ static ssize_t ucma_connect(struct ucma_file *file, const char __user *inbuf,
return PTR_ERR(ctx);
ucma_copy_conn_param(ctx->cm_id, &conn_param, &cmd.conn_param);
if (offsetofend(typeof(cmd), ece) <= in_size) {
ece.vendor_id = cmd.ece.vendor_id;
ece.attr_mod = cmd.ece.attr_mod;
}
mutex_lock(&ctx->mutex);
ret = rdma_connect(ctx->cm_id, &conn_param);
ret = rdma_connect_ece(ctx->cm_id, &conn_param, &ece);
mutex_unlock(&ctx->mutex);
ucma_put_ctx(ctx);
return ret;

3
include/rdma/rdma_cm.h
View File

@ -264,6 +264,9 @@ int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
*/
int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param);
int rdma_connect_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
struct rdma_ucm_ece *ece);
/**
* rdma_listen - This function is called by the passive side to
* listen for incoming connection requests.

6
include/uapi/rdma/rdma_user_cm.h
View File

@ -210,10 +210,16 @@ struct rdma_ucm_ud_param {
__u8 reserved[7];
};
struct rdma_ucm_ece {
__u32 vendor_id;
__u32 attr_mod;
};
struct rdma_ucm_connect {
struct rdma_ucm_conn_param conn_param;
__u32 id;
__u32 reserved;
struct rdma_ucm_ece ece;
};
struct rdma_ucm_listen {