Merge branch 'net-second-round-of-netdevice-refcount-tracking'

Eric Dumazet says:

====================
net: second round of netdevice refcount tracking

The most interesting part of this series is probably
("inet: add net device refcount tracker to struct fib_nh_common")
but only future reports will confirm this guess.
====================

Link: https://lore.kernel.org/r/20211207013039.1868645-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

7 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/if_eql.h b/include/linux/if_eql.h
index d984694c384d..d75601d613cc 100644
--- a/include/linux/if_eql.h
+++ b/include/linux/if_eql.h
@@ -26,6 +26,7 @@
 typedef struct slave {
 	struct list_head	list;
 	struct net_device	*dev;
+	netdevice_tracker	dev_tracker;
 	long			priority;
 	long			priority_bps;
 	long			priority_Bps;
diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 41a518336673..8420fe504927 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -162,6 +162,7 @@ struct netpoll;
  *	@vlan_id: VLAN identifier
  *	@flags: device flags
  *	@real_dev: underlying netdevice
+ *	@dev_tracker: refcount tracker for @real_dev reference
  *	@real_dev_addr: address of underlying netdevice
  *	@dent: proc dir entry
  *	@vlan_pcpu_stats: ptr to percpu rx stats
@@ -177,6 +178,8 @@ struct vlan_dev_priv {
 	u16					flags;
 
 	struct net_device			*real_dev;
+	netdevice_tracker			dev_tracker;
+
 	unsigned char				real_dev_addr[ETH_ALEN];
 
 	struct proc_dir_entry			*dent;
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 69dca1edd5a6..1a748ee9a421 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1951,6 +1951,7 @@ enum netdev_ml_priv_type {
  *
  *	@dev_addr_shadow:	Copy of @dev_addr to catch direct writes.
  *	@linkwatch_dev_tracker:	refcount tracker used by linkwatch.
+ *	@watchdog_dev_tracker:	refcount tracker used by watchdog.
  *
  *	FIXME: cleanup struct net_device such that network protocol info
  *	moves out.
@@ -2282,6 +2283,7 @@ struct net_device {
 
 	u8 dev_addr_shadow[MAX_ADDR_LEN];
 	netdevice_tracker	linkwatch_dev_tracker;
+	netdevice_tracker	watchdog_dev_tracker;
 };
 #define to_net_dev(d) container_of(d, struct net_device, dev)
 
diff --git a/include/net/ax25.h b/include/net/ax25.h
index 03d409de61ad..526e49589197 100644
--- a/include/net/ax25.h
+++ b/include/net/ax25.h
@@ -229,7 +229,10 @@ struct ctl_table;
 
 typedef struct ax25_dev {
 	struct ax25_dev		*next;
+
 	struct net_device	*dev;
+	netdevice_tracker	dev_tracker;
+
 	struct net_device	*forward;
 	struct ctl_table_header *sysheader;
 	int			values[AX25_MAX_VALUES];
diff --git a/include/net/ip_fib.h b/include/net/ip_fib.h
index 3417ba2d27ad..c4297704bbcb 100644
--- a/include/net/ip_fib.h
+++ b/include/net/ip_fib.h
@@ -79,6 +79,7 @@ struct fnhe_hash_bucket {
 
 struct fib_nh_common {
 	struct net_device	*nhc_dev;
+	netdevice_tracker	nhc_dev_tracker;
 	int			nhc_oif;
 	unsigned char		nhc_scope;
 	u8			nhc_family;
@@ -111,6 +112,7 @@ struct fib_nh {
 	int			nh_saddr_genid;
 #define fib_nh_family		nh_common.nhc_family
 #define fib_nh_dev		nh_common.nhc_dev
+#define fib_nh_dev_tracker	nh_common.nhc_dev_tracker
 #define fib_nh_oif		nh_common.nhc_oif
 #define fib_nh_flags		nh_common.nhc_flags
 #define fib_nh_lws		nh_common.nhc_lwtstate
diff --git a/include/net/llc_conn.h b/include/net/llc_conn.h
index ea985aa7a6c5..2c1ea3414640 100644
--- a/include/net/llc_conn.h
+++ b/include/net/llc_conn.h
@@ -38,6 +38,7 @@ struct llc_sock {
 	struct llc_addr	    laddr;		/* lsap/mac pair */
 	struct llc_addr	    daddr;		/* dsap/mac pair */
 	struct net_device   *dev;		/* device to send to remote */
+	netdevice_tracker   dev_tracker;
 	u32		    copied_seq;		/* head of yet unread data */
 	u8		    retry_count;	/* number of retries */
 	u8		    ack_must_be_send;
diff --git a/include/net/tc_act/tc_mirred.h b/include/net/tc_act/tc_mirred.h
index 1cace4c69e44..32ce8ea36950 100644
--- a/include/net/tc_act/tc_mirred.h
+++ b/include/net/tc_act/tc_mirred.h
@@ -10,6 +10,7 @@ struct tcf_mirred {
 	int			tcfm_eaction;
 	bool			tcfm_mac_header_xmit;
 	struct net_device __rcu	*tcfm_dev;
+	netdevice_tracker	tcfm_dev_tracker;
 	struct list_head	tcfm_list;
 };
 #define to_mirred(a) ((struct tcf_mirred *)a)