From 2df91e397d85cd4c5206ab48d4e398e338db02d7 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Fri, 29 Jul 2022 09:12:33 +0000 Subject: [PATCH] net: rose: add netdev ref tracker to 'struct rose_sock' This will help debugging netdevice refcount problems with CONFIG_NET_DEV_REFCNT_TRACKER=y Signed-off-by: Eric Dumazet Cc: Tested-by: Bernard Pidoux Signed-off-by: Jakub Kicinski --- include/net/rose.h | 3 ++- net/rose/af_rose.c | 12 +++++++++--- 2 files changed, 11 insertions(+), 4 deletions(-) diff --git a/include/net/rose.h b/include/net/rose.h index f192a64ddef2..23267b4efcfa 100644 --- a/include/net/rose.h +++ b/include/net/rose.h @@ -132,7 +132,8 @@ struct rose_sock { ax25_address source_digis[ROSE_MAX_DIGIS]; ax25_address dest_digis[ROSE_MAX_DIGIS]; struct rose_neigh *neighbour; - struct net_device *device; + struct net_device *device; + netdevice_tracker dev_tracker; unsigned int lci, rand; unsigned char state, condition, qbitincl, defer; unsigned char cause, diagnostic; diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c index a8e3ec800a9c..36fefc3957d7 100644 --- a/net/rose/af_rose.c +++ b/net/rose/af_rose.c @@ -192,7 +192,7 @@ static void rose_kill_by_device(struct net_device *dev) rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0); if (rose->neighbour) rose->neighbour->use--; - dev_put(rose->device); + netdev_put(rose->device, &rose->dev_tracker); rose->device = NULL; } } @@ -594,7 +594,7 @@ static struct sock *rose_make_new(struct sock *osk) rose->defer = orose->defer; rose->device = orose->device; if (rose->device) - dev_hold(rose->device); + netdev_hold(rose->device, &rose->dev_tracker, GFP_ATOMIC); rose->qbitincl = orose->qbitincl; return sk; @@ -648,7 +648,7 @@ static int rose_release(struct socket *sock) break; } - dev_put(rose->device); + netdev_put(rose->device, &rose->dev_tracker); sock->sk = NULL; release_sock(sk); sock_put(sk); @@ -700,6 +700,7 @@ static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) rose->source_addr = addr->srose_addr; rose->device = dev; + netdev_tracker_alloc(rose->device, &rose->dev_tracker, GFP_KERNEL); rose->source_ndigis = addr->srose_ndigis; if (addr_len == sizeof(struct full_sockaddr_rose)) { @@ -801,6 +802,8 @@ static int rose_connect(struct socket *sock, struct sockaddr *uaddr, int addr_le memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN); rose->source_call = user->call; rose->device = dev; + netdev_tracker_alloc(rose->device, &rose->dev_tracker, + GFP_KERNEL); ax25_uid_put(user); rose_insert_socket(sk); /* Finish the bind */ @@ -1024,6 +1027,9 @@ int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct ros make_rose->source_digis[n] = facilities.source_digis[n]; make_rose->neighbour = neigh; make_rose->device = dev; + /* Caller got a reference for us. */ + netdev_tracker_alloc(make_rose->device, &make_rose->dev_tracker, + GFP_ATOMIC); make_rose->facilities = facilities; make_rose->neighbour->use++;