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RDMA/ucma: Allow user space to specify AF_IB when joining multicast 

Allow user space applications to join multicast groups using MGIDs
directly.  MGIDs may be passed using AF_IB addresses.  Since the
current multicast join command only supports addresses as large as
sockaddr_in6, define a new structure for joining addresses specified
using sockaddr_ib.

Since AF_IB allows the user to specify the qkey when resolving a
remote UD QP address, when joining the multicast group use the qkey
value, if one has been assigned.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Sean Hefty 2013-05-29 10:09:33 -07:00 committed by Roland Dreier
parent 209cf2a751
commit 5bc2b7b397
3 changed files with 62 additions and 14 deletions
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9
drivers/infiniband/core/cma.c
View File

@ -3149,6 +3149,8 @@ static void cma_set_mgid(struct rdma_id_private *id_priv,
0xFF10A01B)) {
/* IPv6 address is an SA assigned MGID. */
memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
} else if (addr->sa_family == AF_IB) {
memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
} else if ((addr->sa_family == AF_INET6)) {
ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
if (id_priv->id.ps == RDMA_PS_UDP)
@ -3176,9 +3178,12 @@ static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
if (ret)
return ret;
ret = cma_set_qkey(id_priv, 0);
if (ret)
return ret;
cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
if (id_priv->id.ps == RDMA_PS_UDP)
rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
rec.qkey = cpu_to_be32(id_priv->qkey);
rdma_addr_get_sgid(dev_addr, &rec.port_gid);
rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
rec.join_state = 1;

55
drivers/infiniband/core/ucma.c
View File

@ -1229,23 +1229,23 @@ static ssize_t ucma_notify(struct ucma_file *file, const char __user *inbuf,
return ret;
}
static ssize_t ucma_join_ip_multicast(struct ucma_file *file,
const char __user *inbuf,
int in_len, int out_len)
static ssize_t ucma_process_join(struct ucma_file *file,
struct rdma_ucm_join_mcast *cmd, int out_len)
{
struct rdma_ucm_join_ip_mcast cmd;
struct rdma_ucm_create_id_resp resp;
struct ucma_context *ctx;
struct ucma_multicast *mc;
struct sockaddr *addr;
int ret;
if (out_len < sizeof(resp))
return -ENOSPC;
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
return -EFAULT;
addr = (struct sockaddr *) &cmd->addr;
if (cmd->reserved || !cmd->addr_size || (cmd->addr_size != rdma_addr_size(addr)))
return -EINVAL;
ctx = ucma_get_ctx(file, cmd.id);
ctx = ucma_get_ctx(file, cmd->id);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
@ -1256,14 +1256,14 @@ static ssize_t ucma_join_ip_multicast(struct ucma_file *file,
goto err1;
}
mc->uid = cmd.uid;
memcpy(&mc->addr, &cmd.addr, sizeof cmd.addr);
mc->uid = cmd->uid;
memcpy(&mc->addr, addr, cmd->addr_size);
ret = rdma_join_multicast(ctx->cm_id, (struct sockaddr *) &mc->addr, mc);
if (ret)
goto err2;
resp.id = mc->id;
if (copy_to_user((void __user *)(unsigned long)cmd.response,
if (copy_to_user((void __user *)(unsigned long) cmd->response,
&resp, sizeof(resp))) {
ret = -EFAULT;
goto err3;
@ -1288,6 +1288,38 @@ static ssize_t ucma_join_ip_multicast(struct ucma_file *file,
return ret;
}
static ssize_t ucma_join_ip_multicast(struct ucma_file *file,
const char __user *inbuf,
int in_len, int out_len)
{
struct rdma_ucm_join_ip_mcast cmd;
struct rdma_ucm_join_mcast join_cmd;
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
return -EFAULT;
join_cmd.response = cmd.response;
join_cmd.uid = cmd.uid;
join_cmd.id = cmd.id;
join_cmd.addr_size = rdma_addr_size((struct sockaddr *) &cmd.addr);
join_cmd.reserved = 0;
memcpy(&join_cmd.addr, &cmd.addr, join_cmd.addr_size);
return ucma_process_join(file, &join_cmd, out_len);
}
static ssize_t ucma_join_multicast(struct ucma_file *file,
const char __user *inbuf,
int in_len, int out_len)
{
struct rdma_ucm_join_mcast cmd;
if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
return -EFAULT;
return ucma_process_join(file, &cmd, out_len);
}
static ssize_t ucma_leave_multicast(struct ucma_file *file,
const char __user *inbuf,
int in_len, int out_len)
@ -1451,7 +1483,8 @@ static ssize_t (*ucma_cmd_table[])(struct ucma_file *file,
[RDMA_USER_CM_CMD_MIGRATE_ID] = ucma_migrate_id,
[RDMA_USER_CM_CMD_QUERY] = ucma_query,
[RDMA_USER_CM_CMD_BIND] = ucma_bind,
[RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr
[RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr,
[RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast
};
static ssize_t ucma_write(struct file *filp, const char __user *buf,

12
include/uapi/rdma/rdma_user_cm.h
View File

@ -64,7 +64,8 @@ enum {
RDMA_USER_CM_CMD_MIGRATE_ID,
RDMA_USER_CM_CMD_QUERY,
RDMA_USER_CM_CMD_BIND,
RDMA_USER_CM_CMD_RESOLVE_ADDR
RDMA_USER_CM_CMD_RESOLVE_ADDR,
RDMA_USER_CM_CMD_JOIN_MCAST
};
/*
@ -242,6 +243,15 @@ struct rdma_ucm_join_ip_mcast {
__u32 id;
};
struct rdma_ucm_join_mcast {
__u64 response; /* rdma_ucma_create_id_resp */
__u64 uid;
__u32 id;
__u16 addr_size;
__u16 reserved;
struct sockaddr_storage addr;
};
struct rdma_ucm_get_event {
__u64 response;
};