netdev-genl: Add PID for the NAPI thread

In the threaded NAPI mode, expose the PID of the NAPI thread.

Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Reviewed-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Link: https://lore.kernel.org/r/170147335818.5260.10253384006102593087.stgit@anambiarhost.jf.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/net/core/netdev-genl.c b/net/core/netdev-genl.c
index 9753c19e36de54cd0d83b1ec81554a916e8bf397..fd98936da3aec01d467d087fdde89156a32fcde7 100644 (file)
--- a/net/core/netdev-genl.c
+++ b/net/core/netdev-genl.c
@@ -163,6 +163,7 @@ netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi,
                        const struct genl_info *info)
 {
        void *hdr;
+       pid_t pid;
 
        if (WARN_ON_ONCE(!napi->dev))
                return -EINVAL;
@@ -183,6 +184,12 @@ netdev_nl_napi_fill_one(struct sk_buff *rsp, struct napi_struct *napi,
        if (napi->irq >= 0 && nla_put_u32(rsp, NETDEV_A_NAPI_IRQ, napi->irq))
                goto nla_put_failure;
 
+       if (napi->thread) {
+               pid = task_pid_nr(napi->thread);
+               if (nla_put_u32(rsp, NETDEV_A_NAPI_PID, pid))
+                       goto nla_put_failure;
+       }
+
        genlmsg_end(rsp, hdr);
 
        return 0;