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RDMA/netlink: Implement nldev device dumpit calback

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This patch adds the ability to return all available devices
together with their properties.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
This commit is contained in:
Leon Romanovsky 2017-06-20 09:59:14 +03:00 • committed by Leon Romanovsky
parent 6c80b41abe
commit b4c598a67e
1 changed files with 63 additions and 1 deletions
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64
drivers/infiniband/core/nldev.c
View file

@ -30,13 +30,75 @@
* POSSIBILITY OF SUCH DAMAGE. * POSSIBILITY OF SUCH DAMAGE.
*/ */
#include <net/netlink.h>
#include <rdma/rdma_netlink.h> #include <rdma/rdma_netlink.h>
#include "core_priv.h" #include "core_priv.h"
static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
[RDMA_NLDEV_ATTR_DEV_INDEX] = { .type = NLA_U32 },
[RDMA_NLDEV_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING,
.len = IB_DEVICE_NAME_MAX - 1},
[RDMA_NLDEV_ATTR_PORT_INDEX] = { .type = NLA_U32 },
};
static int fill_dev_info(struct sk_buff *msg, struct ib_device *device)
{
if (nla_put_u32(msg, RDMA_NLDEV_ATTR_DEV_INDEX, device->index))
return -EMSGSIZE;
if (nla_put_string(msg, RDMA_NLDEV_ATTR_DEV_NAME, device->name))
return -EMSGSIZE;
if (nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, rdma_end_port(device)))
return -EMSGSIZE;
return 0;
}
static int _nldev_get_dumpit(struct ib_device *device,
struct sk_buff *skb,
struct netlink_callback *cb,
unsigned int idx)
{
int start = cb->args[0];
struct nlmsghdr *nlh;
if (idx < start)
return 0;
nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
RDMA_NL_GET_TYPE(RDMA_NL_NLDEV, RDMA_NLDEV_CMD_GET),
0, NLM_F_MULTI);
if (fill_dev_info(skb, device)) {
nlmsg_cancel(skb, nlh);
goto out;
}
nlmsg_end(skb, nlh);
idx++;
out: cb->args[0] = idx;
return skb->len;
}
static int nldev_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb)
{
/*
* There is no need to take lock, because
* we are relying on ib_core's lists_rwsem
*/
return ib_enum_all_devs(_nldev_get_dumpit, skb, cb);
}
static const struct rdma_nl_cbs nldev_cb_table[] = {
[RDMA_NLDEV_CMD_GET] = {
.dump = nldev_get_dumpit,
},
};
void __init nldev_init(void) void __init nldev_init(void)
{ {
rdma_nl_register(RDMA_NL_NLDEV, NULL); rdma_nl_register(RDMA_NL_NLDEV, nldev_cb_table);
} }
void __exit nldev_exit(void) void __exit nldev_exit(void)