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Commit 1a33e10e authored by Cong Wang's avatar Cong Wang Committed by David S. Miller
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net: partially revert dynamic lockdep key changes 

This patch reverts the folowing commits:

commit 064ff66e
"bonding: add missing netdev_update_lockdep_key()"

commit 53d37497
"net: avoid updating qdisc_xmit_lock_key in netdev_update_lockdep_key()"

commit 1f26c0d3
"net: fix kernel-doc warning in <linux/netdevice.h>"

commit ab92d68f
"net: core: add generic lockdep keys"

but keeps the addr_list_lock_key because we still lock
addr_list_lock nestedly on stack devices, unlikely xmit_lock
this is safe because we don't take addr_list_lock on any fast
path.

Reported-and-tested-by: syzbot+aaa6fa4949cc5d9b7b25@syzkaller.appspotmail.com
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: default avatarCong Wang <xiyou.wangcong@gmail.com>
Acked-by: default avatarTaehee Yoo <ap420073@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ea84c842
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Showing with 294 additions and 33 deletions
drivers/net/bonding/bond_main.c
View file @ 1a33e10e
......@@ -4898,6 +4898,7 @@ static int bond_init(struct net_device *bond_dev)
spin_lock_init(&bond->stats_lock);
lockdep_register_key(&bond->stats_lock_key);
lockdep_set_class(&bond->stats_lock, &bond->stats_lock_key);
netdev_lockdep_set_classes(bond_dev);
list_add_tail(&bond->bond_list, &bn->dev_list);
......
drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
View file @ 1a33e10e
......@@ -299,6 +299,20 @@ static void nfp_repr_clean(struct nfp_repr *repr)
nfp_port_free(repr->port);
}
static struct lock_class_key nfp_repr_netdev_xmit_lock_key;
static void nfp_repr_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &nfp_repr_netdev_xmit_lock_key);
}
static void nfp_repr_set_lockdep_class(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, nfp_repr_set_lockdep_class_one, NULL);
}
int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
u32 cmsg_port_id, struct nfp_port *port,
struct net_device *pf_netdev)
......@@ -308,6 +322,8 @@ int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
u32 repr_cap = nn->tlv_caps.repr_cap;
int err;
nfp_repr_set_lockdep_class(netdev);
repr->port = port;
repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL);
if (!repr->dst)
......
drivers/net/hamradio/bpqether.c
View file @ 1a33e10e
......@@ -107,6 +107,25 @@ struct bpqdev {
static LIST_HEAD(bpq_devices);
/*
* bpqether network devices are paired with ethernet devices below them, so
* form a special "super class" of normal ethernet devices; split their locks
* off into a separate class since they always nest.
*/
static struct lock_class_key bpq_netdev_xmit_lock_key;
static void bpq_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &bpq_netdev_xmit_lock_key);
}
static void bpq_set_lockdep_class(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, bpq_set_lockdep_class_one, NULL);
}
/* ------------------------------------------------------------------------ */
......@@ -477,6 +496,7 @@ static int bpq_new_device(struct net_device *edev)
err = register_netdevice(ndev);
if (err)
goto error;
bpq_set_lockdep_class(ndev);
/* List protected by RTNL */
list_add_rcu(&bpq->bpq_list, &bpq_devices);
......
drivers/net/hyperv/netvsc_drv.c
View file @ 1a33e10e
......@@ -2456,6 +2456,8 @@ static int netvsc_probe(struct hv_device *dev,
NETIF_F_HW_VLAN_CTAG_RX;
net->vlan_features = net->features;
netdev_lockdep_set_classes(net);
/* MTU range: 68 - 1500 or 65521 */
net->min_mtu = NETVSC_MTU_MIN;
if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2)
......
drivers/net/ipvlan/ipvlan_main.c
View file @ 1a33e10e
......@@ -131,6 +131,8 @@ static int ipvlan_init(struct net_device *dev)
dev->gso_max_segs = phy_dev->gso_max_segs;
dev->hard_header_len = phy_dev->hard_header_len;
netdev_lockdep_set_classes(dev);
ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats);
if (!ipvlan->pcpu_stats)
return -ENOMEM;
......
drivers/net/macsec.c
View file @ 1a33e10e
......@@ -4047,6 +4047,8 @@ static int macsec_newlink(struct net *net, struct net_device *dev,
if (err < 0)
return err;
netdev_lockdep_set_classes(dev);
err = netdev_upper_dev_link(real_dev, dev, extack);
if (err < 0)
goto unregister;
......
drivers/net/macvlan.c
View file @ 1a33e10e
......@@ -890,6 +890,8 @@ static int macvlan_init(struct net_device *dev)
dev->gso_max_segs = lowerdev->gso_max_segs;
dev->hard_header_len = lowerdev->hard_header_len;
netdev_lockdep_set_classes(dev);
vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
if (!vlan->pcpu_stats)
return -ENOMEM;
......
drivers/net/ppp/ppp_generic.c
View file @ 1a33e10e
......@@ -1410,6 +1410,8 @@ static int ppp_dev_init(struct net_device *dev)
{
struct ppp *ppp;
netdev_lockdep_set_classes(dev);
ppp = netdev_priv(dev);
/* Let the netdevice take a reference on the ppp file. This ensures
* that ppp_destroy_interface() won't run before the device gets
......
drivers/net/team/team.c
View file @ 1a33e10e
......@@ -1647,6 +1647,7 @@ static int team_init(struct net_device *dev)
lockdep_register_key(&team->team_lock_key);
__mutex_init(&team->lock, "team->team_lock_key", &team->team_lock_key);
netdev_lockdep_set_classes(dev);
return 0;
......
drivers/net/vrf.c
View file @ 1a33e10e
......@@ -867,6 +867,7 @@ static int vrf_dev_init(struct net_device *dev)
/* similarly, oper state is irrelevant; set to up to avoid confusion */
dev->operstate = IF_OPER_UP;
netdev_lockdep_set_classes(dev);
return 0;
out_rth:
......
drivers/net/wireless/intersil/hostap/hostap_hw.c
View file @ 1a33e10e
......@@ -3041,6 +3041,27 @@ static void prism2_clear_set_tim_queue(local_info_t *local)
}
}
/*
* HostAP uses two layers of net devices, where the inner
* layer gets called all the time from the outer layer.
* This is a natural nesting, which needs a split lock type.
*/
static struct lock_class_key hostap_netdev_xmit_lock_key;
static void prism2_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock,
&hostap_netdev_xmit_lock_key);
}
static void prism2_set_lockdep_class(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
}
static struct net_device *
prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
struct device *sdev)
......@@ -3199,6 +3220,7 @@ while (0)
if (ret >= 0)
ret = register_netdevice(dev);
prism2_set_lockdep_class(dev);
rtnl_unlock();
if (ret < 0) {
printk(KERN_WARNING "%s: register netdevice failed!\n",
......
include/linux/netdevice.h
View file @ 1a33e10e
......@@ -1805,13 +1805,11 @@ enum netdev_priv_flags {
* @phydev: Physical device may attach itself
* for hardware timestamping
* @sfp_bus: attached &struct sfp_bus structure.
* @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
* spinlock
* @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
* @qdisc_xmit_lock_key: lockdep class annotating
* netdev_queue->_xmit_lock spinlock
*
* @addr_list_lock_key: lockdep class annotating
* net_device->addr_list_lock spinlock
* @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock
* @qdisc_running_key: lockdep class annotating Qdisc->running seqcount
*
* @proto_down: protocol port state information can be sent to the
* switch driver and used to set the phys state of the
......@@ -2112,10 +2110,9 @@ struct net_device {
#endif
struct phy_device *phydev;
struct sfp_bus *sfp_bus;
struct lock_class_key qdisc_tx_busylock_key;
struct lock_class_key qdisc_running_key;
struct lock_class_key qdisc_xmit_lock_key;
struct lock_class_key addr_list_lock_key;
struct lock_class_key *qdisc_tx_busylock;
struct lock_class_key *qdisc_running_key;
bool proto_down;
unsigned wol_enabled:1;
......@@ -2200,6 +2197,20 @@ static inline void netdev_for_each_tx_queue(struct net_device *dev,
f(dev, &dev->_tx[i], arg);
}
#define netdev_lockdep_set_classes(dev) \
{ \
static struct lock_class_key qdisc_tx_busylock_key; \
static struct lock_class_key qdisc_running_key; \
static struct lock_class_key qdisc_xmit_lock_key; \
unsigned int i; \
\
(dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
(dev)->qdisc_running_key = &qdisc_running_key; \
for (i = 0; i < (dev)->num_tx_queues; i++) \
lockdep_set_class(&(dev)->_tx[i]._xmit_lock, \
&qdisc_xmit_lock_key); \
}
u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev);
struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
......
net/8021q/vlan_dev.c
View file @ 1a33e10e
......@@ -489,6 +489,25 @@ static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev);
}
/*
* vlan network devices have devices nesting below it, and are a special
* "super class" of normal network devices; split their locks off into a
* separate class since they always nest.
*/
static struct lock_class_key vlan_netdev_xmit_lock_key;
static void vlan_dev_set_lockdep_one(struct net_device *dev,
struct netdev_queue *txq,
void *unused)
{
lockdep_set_class(&txq->_xmit_lock, &vlan_netdev_xmit_lock_key);
}
static void vlan_dev_set_lockdep_class(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, NULL);
}
static const struct header_ops vlan_header_ops = {
.create = vlan_dev_hard_header,
.parse = eth_header_parse,
......@@ -579,6 +598,8 @@ static int vlan_dev_init(struct net_device *dev)
SET_NETDEV_DEVTYPE(dev, &vlan_type);
vlan_dev_set_lockdep_class(dev);
vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
if (!vlan->vlan_pcpu_stats)
return -ENOMEM;
......
net/batman-adv/soft-interface.c
View file @ 1a33e10e
......@@ -739,6 +739,34 @@ static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
return 0;
}
/* batman-adv network devices have devices nesting below it and are a special
* "super class" of normal network devices; split their locks off into a
* separate class since they always nest.
*/
static struct lock_class_key batadv_netdev_xmit_lock_key;
/**
* batadv_set_lockdep_class_one() - Set lockdep class for a single tx queue
* @dev: device which owns the tx queue
* @txq: tx queue to modify
* @_unused: always NULL
*/
static void batadv_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
}
/**
* batadv_set_lockdep_class() - Set txq and addr_list lockdep class
* @dev: network device to modify
*/
static void batadv_set_lockdep_class(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
}
/**
* batadv_softif_init_late() - late stage initialization of soft interface
* @dev: registered network device to modify
......@@ -752,6 +780,8 @@ static int batadv_softif_init_late(struct net_device *dev)
int ret;
size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM;
batadv_set_lockdep_class(dev);
bat_priv = netdev_priv(dev);
bat_priv->soft_iface = dev;
......
net/bluetooth/6lowpan.c
View file @ 1a33e10e
......@@ -571,7 +571,15 @@ static netdev_tx_t bt_xmit(struct sk_buff *skb, struct net_device *netdev)
return err < 0 ? NET_XMIT_DROP : err;
}
static int bt_dev_init(struct net_device *dev)
{
netdev_lockdep_set_classes(dev);
return 0;
}
static const struct net_device_ops netdev_ops = {
.ndo_init = bt_dev_init,
.ndo_start_xmit = bt_xmit,
};
......
net/core/dev.c
View file @ 1a33e10e
......@@ -398,6 +398,74 @@ static RAW_NOTIFIER_HEAD(netdev_chain);
DEFINE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
EXPORT_PER_CPU_SYMBOL(softnet_data);
#ifdef CONFIG_LOCKDEP
/*
* register_netdevice() inits txq->_xmit_lock and sets lockdep class
* according to dev->type
*/
static const unsigned short netdev_lock_type[] = {
ARPHRD_NETROM, ARPHRD_ETHER, ARPHRD_EETHER, ARPHRD_AX25,
ARPHRD_PRONET, ARPHRD_CHAOS, ARPHRD_IEEE802, ARPHRD_ARCNET,
ARPHRD_APPLETLK, ARPHRD_DLCI, ARPHRD_ATM, ARPHRD_METRICOM,
ARPHRD_IEEE1394, ARPHRD_EUI64, ARPHRD_INFINIBAND, ARPHRD_SLIP,
ARPHRD_CSLIP, ARPHRD_SLIP6, ARPHRD_CSLIP6, ARPHRD_RSRVD,
ARPHRD_ADAPT, ARPHRD_ROSE, ARPHRD_X25, ARPHRD_HWX25,
ARPHRD_PPP, ARPHRD_CISCO, ARPHRD_LAPB, ARPHRD_DDCMP,
ARPHRD_RAWHDLC, ARPHRD_TUNNEL, ARPHRD_TUNNEL6, ARPHRD_FRAD,
ARPHRD_SKIP, ARPHRD_LOOPBACK, ARPHRD_LOCALTLK, ARPHRD_FDDI,
ARPHRD_BIF, ARPHRD_SIT, ARPHRD_IPDDP, ARPHRD_IPGRE,
ARPHRD_PIMREG, ARPHRD_HIPPI, ARPHRD_ASH, ARPHRD_ECONET,
ARPHRD_IRDA, ARPHRD_FCPP, ARPHRD_FCAL, ARPHRD_FCPL,
ARPHRD_FCFABRIC, ARPHRD_IEEE80211, ARPHRD_IEEE80211_PRISM,
ARPHRD_IEEE80211_RADIOTAP, ARPHRD_PHONET, ARPHRD_PHONET_PIPE,
ARPHRD_IEEE802154, ARPHRD_VOID, ARPHRD_NONE};
static const char *const netdev_lock_name[] = {
"_xmit_NETROM", "_xmit_ETHER", "_xmit_EETHER", "_xmit_AX25",
"_xmit_PRONET", "_xmit_CHAOS", "_xmit_IEEE802", "_xmit_ARCNET",
"_xmit_APPLETLK", "_xmit_DLCI", "_xmit_ATM", "_xmit_METRICOM",
"_xmit_IEEE1394", "_xmit_EUI64", "_xmit_INFINIBAND", "_xmit_SLIP",
"_xmit_CSLIP", "_xmit_SLIP6", "_xmit_CSLIP6", "_xmit_RSRVD",
"_xmit_ADAPT", "_xmit_ROSE", "_xmit_X25", "_xmit_HWX25",
"_xmit_PPP", "_xmit_CISCO", "_xmit_LAPB", "_xmit_DDCMP",
"_xmit_RAWHDLC", "_xmit_TUNNEL", "_xmit_TUNNEL6", "_xmit_FRAD",
"_xmit_SKIP", "_xmit_LOOPBACK", "_xmit_LOCALTLK", "_xmit_FDDI",
"_xmit_BIF", "_xmit_SIT", "_xmit_IPDDP", "_xmit_IPGRE",
"_xmit_PIMREG", "_xmit_HIPPI", "_xmit_ASH", "_xmit_ECONET",
"_xmit_IRDA", "_xmit_FCPP", "_xmit_FCAL", "_xmit_FCPL",
"_xmit_FCFABRIC", "_xmit_IEEE80211", "_xmit_IEEE80211_PRISM",
"_xmit_IEEE80211_RADIOTAP", "_xmit_PHONET", "_xmit_PHONET_PIPE",
"_xmit_IEEE802154", "_xmit_VOID", "_xmit_NONE"};
static struct lock_class_key netdev_xmit_lock_key[ARRAY_SIZE(netdev_lock_type)];
static inline unsigned short netdev_lock_pos(unsigned short dev_type)
{
int i;
for (i = 0; i < ARRAY_SIZE(netdev_lock_type); i++)
if (netdev_lock_type[i] == dev_type)
return i;
/* the last key is used by default */
return ARRAY_SIZE(netdev_lock_type) - 1;
}
static inline void netdev_set_xmit_lockdep_class(spinlock_t *lock,
unsigned short dev_type)
{
int i;
i = netdev_lock_pos(dev_type);
lockdep_set_class_and_name(lock, &netdev_xmit_lock_key[i],
netdev_lock_name[i]);
}
#else
static inline void netdev_set_xmit_lockdep_class(spinlock_t *lock,
unsigned short dev_type)
{
}
#endif
/*******************************************************************************
*
* Protocol management and registration routines
......@@ -9208,7 +9276,7 @@ static void netdev_init_one_queue(struct net_device *dev,
{
/* Initialize queue lock */
spin_lock_init(&queue->_xmit_lock);
lockdep_set_class(&queue->_xmit_lock, &dev->qdisc_xmit_lock_key);
netdev_set_xmit_lockdep_class(&queue->_xmit_lock, dev->type);
queue->xmit_lock_owner = -1;
netdev_queue_numa_node_write(queue, NUMA_NO_NODE);
queue->dev = dev;
......@@ -9255,22 +9323,6 @@ void netif_tx_stop_all_queues(struct net_device *dev)
}
EXPORT_SYMBOL(netif_tx_stop_all_queues);
static void netdev_register_lockdep_key(struct net_device *dev)
{
lockdep_register_key(&dev->qdisc_tx_busylock_key);
lockdep_register_key(&dev->qdisc_running_key);
lockdep_register_key(&dev->qdisc_xmit_lock_key);
lockdep_register_key(&dev->addr_list_lock_key);
}
static void netdev_unregister_lockdep_key(struct net_device *dev)
{
lockdep_unregister_key(&dev->qdisc_tx_busylock_key);
lockdep_unregister_key(&dev->qdisc_running_key);
lockdep_unregister_key(&dev->qdisc_xmit_lock_key);
lockdep_unregister_key(&dev->addr_list_lock_key);
}
void netdev_update_lockdep_key(struct net_device *dev)
{
lockdep_unregister_key(&dev->addr_list_lock_key);
......@@ -9837,7 +9889,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
dev_net_set(dev, &init_net);
netdev_register_lockdep_key(dev);
lockdep_register_key(&dev->addr_list_lock_key);
dev->gso_max_size = GSO_MAX_SIZE;
dev->gso_max_segs = GSO_MAX_SEGS;
......@@ -9926,7 +9978,7 @@ void free_netdev(struct net_device *dev)
free_percpu(dev->xdp_bulkq);
dev->xdp_bulkq = NULL;
netdev_unregister_lockdep_key(dev);
lockdep_unregister_key(&dev->addr_list_lock_key);
/* Compatibility with error handling in drivers */
if (dev->reg_state == NETREG_UNINITIALIZED) {
......
net/dsa/slave.c
View file @ 1a33e10e
......@@ -1671,6 +1671,15 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
return ret;
}
static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock,
&dsa_slave_netdev_xmit_lock_key);
}
int dsa_slave_suspend(struct net_device *slave_dev)
{
struct dsa_port *dp = dsa_slave_to_port(slave_dev);
......@@ -1754,6 +1763,9 @@ int dsa_slave_create(struct dsa_port *port)
slave_dev->max_mtu = ETH_MAX_MTU;
SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
NULL);
SET_NETDEV_DEV(slave_dev, port->ds->dev);
slave_dev->dev.of_node = port->dn;
slave_dev->vlan_features = master->vlan_features;
......
net/ieee802154/6lowpan/core.c
View file @ 1a33e10e
......@@ -58,6 +58,13 @@ static const struct header_ops lowpan_header_ops = {
.create = lowpan_header_create,
};
static int lowpan_dev_init(struct net_device *ldev)
{
netdev_lockdep_set_classes(ldev);
return 0;
}
static int lowpan_open(struct net_device *dev)
{
if (!open_count)
......@@ -89,6 +96,7 @@ static int lowpan_get_iflink(const struct net_device *dev)
}
static const struct net_device_ops lowpan_netdev_ops = {
.ndo_init = lowpan_dev_init,
.ndo_start_xmit = lowpan_xmit,
.ndo_open = lowpan_open,
.ndo_stop = lowpan_stop,
......
net/l2tp/l2tp_eth.c
View file @ 1a33e10e
......@@ -56,6 +56,7 @@ static int l2tp_eth_dev_init(struct net_device *dev)
{
eth_hw_addr_random(dev);
eth_broadcast_addr(dev->broadcast);
netdev_lockdep_set_classes(dev);
return 0;
}
......
net/netrom/af_netrom.c
View file @ 1a33e10e
......@@ -63,6 +63,26 @@ static DEFINE_SPINLOCK(nr_list_lock);
static const struct proto_ops nr_proto_ops;
/*
* NETROM network devices are virtual network devices encapsulating NETROM
* frames into AX.25 which will be sent through an AX.25 device, so form a
* special "super class" of normal net devices; split their locks off into a
* separate class since they always nest.
*/
static struct lock_class_key nr_netdev_xmit_lock_key;
static void nr_set_lockdep_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key);
}
static void nr_set_lockdep_key(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL);
}
/*
* Socket removal during an interrupt is now safe.
*/
......@@ -1394,6 +1414,7 @@ static int __init nr_proto_init(void)
free_netdev(dev);
goto fail;
}
nr_set_lockdep_key(dev);
dev_nr[i] = dev;
}
......
net/rose/af_rose.c
View file @ 1a33e10e
......@@ -64,6 +64,26 @@ static const struct proto_ops rose_proto_ops;
ax25_address rose_callsign;
/*
* ROSE network devices are virtual network devices encapsulating ROSE
* frames into AX.25 which will be sent through an AX.25 device, so form a
* special "super class" of normal net devices; split their locks off into a
* separate class since they always nest.
*/
static struct lock_class_key rose_netdev_xmit_lock_key;
static void rose_set_lockdep_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
}
static void rose_set_lockdep_key(struct net_device *dev)
{
netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
}
/*
* Convert a ROSE address into text.
*/
......@@ -1511,6 +1531,7 @@ static int __init rose_proto_init(void)
free_netdev(dev);
goto fail;
}
rose_set_lockdep_key(dev);
dev_rose[i] = dev;
}
......
net/sched/sch_generic.c
View file @ 1a33e10e
......@@ -794,6 +794,9 @@ struct Qdisc_ops pfifo_fast_ops __read_mostly = {
};
EXPORT_SYMBOL(pfifo_fast_ops);
static struct lock_class_key qdisc_tx_busylock;
static struct lock_class_key qdisc_running_key;
struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
const struct Qdisc_ops *ops,
struct netlink_ext_ack *extack)
......@@ -846,9 +849,17 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
}
spin_lock_init(&sch->busylock);
lockdep_set_class(&sch->busylock,
dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
/* seqlock has the same scope of busylock, for NOLOCK qdisc */
spin_lock_init(&sch->seqlock);
lockdep_set_class(&sch->busylock,
dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
seqcount_init(&sch->running);
lockdep_set_class(&sch->running,
dev->qdisc_running_key ?: &qdisc_running_key);
sch->ops = ops;
sch->flags = ops->static_flags;
......@@ -859,12 +870,6 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
dev_hold(dev);
refcount_set(&sch->refcnt, 1);
if (sch != &noop_qdisc) {
lockdep_set_class(&sch->busylock, &dev->qdisc_tx_busylock_key);
lockdep_set_class(&sch->seqlock, &dev->qdisc_tx_busylock_key);
lockdep_set_class(&sch->running, &dev->qdisc_running_key);
}
return sch;
errout1:
kfree(p);
......
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