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RDMA/nldev: Add support to add/delete a sub IB device through netlink

Browse source 
Add new netlink commands and attributes to support adding and deleting
a sub IB device with admin privilege.

Examples:
$ rdma dev add smi1 type SMI parent ibp8s0f1
$ rdma dev del smi1

Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Link: https://lore.kernel.org/r/77cbf1b36359642be8a8d8c5c2f4e585b544282f.1718553901.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
This commit is contained in:
Mark Zhang 2024-06-16 19:08:40 +03:00 committed by Leon Romanovsky
parent 026a425990
commit 060c642b2a
2 changed files with 65 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

59
drivers/infiniband/core/nldev.c
View file

@ -167,6 +167,7 @@ static const struct nla_policy nldev_policy[RDMA_NLDEV_ATTR_MAX] = {
[RDMA_NLDEV_ATTR_STAT_HWCOUNTER_DYNAMIC] = { .type = NLA_U8 },
[RDMA_NLDEV_SYS_ATTR_PRIVILEGED_QKEY_MODE] = { .type = NLA_U8 },
[RDMA_NLDEV_ATTR_DRIVER_DETAILS] = { .type = NLA_U8 },
[RDMA_NLDEV_ATTR_DEV_TYPE] = { .type = NLA_U8 },
};
static int put_driver_name_print_type(struct sk_buff *msg, const char *name,
@ -2548,6 +2549,56 @@ static int nldev_stat_get_counter_status_doit(struct sk_buff *skb,
return ret;
}
static int nldev_newdev(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
enum rdma_nl_dev_type type;
struct ib_device *parent;
char name[IFNAMSIZ] = {};
u32 parentid;
int ret;
ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
nldev_policy, extack);
if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX] ||
!tb[RDMA_NLDEV_ATTR_DEV_NAME] || !tb[RDMA_NLDEV_ATTR_DEV_TYPE])
return -EINVAL;
nla_strscpy(name, tb[RDMA_NLDEV_ATTR_DEV_NAME], sizeof(name));
type = nla_get_u8(tb[RDMA_NLDEV_ATTR_DEV_TYPE]);
parentid = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
parent = ib_device_get_by_index(sock_net(skb->sk), parentid);
if (!parent)
return -EINVAL;
ret = ib_add_sub_device(parent, type, name);
ib_device_put(parent);
return ret;
}
static int nldev_deldev(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
struct nlattr *tb[RDMA_NLDEV_ATTR_MAX];
struct ib_device *device;
u32 devid;
int ret;
ret = nlmsg_parse(nlh, 0, tb, RDMA_NLDEV_ATTR_MAX - 1,
nldev_policy, extack);
if (ret || !tb[RDMA_NLDEV_ATTR_DEV_INDEX])
return -EINVAL;
devid = nla_get_u32(tb[RDMA_NLDEV_ATTR_DEV_INDEX]);
device = ib_device_get_by_index(sock_net(skb->sk), devid);
if (!device)
return -EINVAL;
return ib_del_sub_device_and_put(device);
}
static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
[RDMA_NLDEV_CMD_GET] = {
.doit = nldev_get_doit,
@ -2646,6 +2697,14 @@ static const struct rdma_nl_cbs nldev_cb_table[RDMA_NLDEV_NUM_OPS] = {
[RDMA_NLDEV_CMD_STAT_GET_STATUS] = {
.doit = nldev_stat_get_counter_status_doit,
},
[RDMA_NLDEV_CMD_NEWDEV] = {
.doit = nldev_newdev,
.flags = RDMA_NL_ADMIN_PERM,
},
[RDMA_NLDEV_CMD_DELDEV] = {
.doit = nldev_deldev,
.flags = RDMA_NL_ADMIN_PERM,
},
};
void __init nldev_init(void)

6
include/uapi/rdma/rdma_netlink.h
View file

@ -301,6 +301,10 @@ enum rdma_nldev_command {
RDMA_NLDEV_CMD_RES_SRQ_GET_RAW,
RDMA_NLDEV_CMD_NEWDEV,
RDMA_NLDEV_CMD_DELDEV,
RDMA_NLDEV_NUM_OPS
};
@ -564,6 +568,8 @@ enum rdma_nldev_attr {
*/
RDMA_NLDEV_ATTR_RES_SUBTYPE, /* string */
RDMA_NLDEV_ATTR_DEV_TYPE, /* u8 */
/*
* Always the end
*/