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net: core: add generic lockdep keys 

Some interface types could be nested.
(VLAN, BONDING, TEAM, MACSEC, MACVLAN, IPVLAN, VIRT_WIFI, VXLAN, etc..)
These interface types should set lockdep class because, without lockdep
class key, lockdep always warn about unexisting circular locking.

In the current code, these interfaces have their own lockdep class keys and
these manage itself. So that there are so many duplicate code around the
/driver/net and /net/.
This patch adds new generic lockdep keys and some helper functions for it.

This patch does below changes.
a) Add lockdep class keys in struct net_device
   - qdisc_running, xmit, addr_list, qdisc_busylock
   - these keys are used as dynamic lockdep key.
b) When net_device is being allocated, lockdep keys are registered.
   - alloc_netdev_mqs()
c) When net_device is being free'd llockdep keys are unregistered.
   - free_netdev()
d) Add generic lockdep key helper function
   - netdev_register_lockdep_key()
   - netdev_unregister_lockdep_key()
   - netdev_update_lockdep_key()
e) Remove unnecessary generic lockdep macro and functions
f) Remove unnecessary lockdep code of each interfaces.

After this patch, each interface modules don't need to maintain
their lockdep keys.

Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Taehee Yoo 2019-10-21 18:47:51 +00:00 committed by David S. Miller
parent 5343da4c17
commit ab92d68fc2
25 changed files with 63 additions and 356 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/bonding/bond_main.c
View File

@ -4769,7 +4769,6 @@ static int bond_init(struct net_device *bond_dev)
return -ENOMEM; return -ENOMEM;
bond->nest_level = SINGLE_DEPTH_NESTING; bond->nest_level = SINGLE_DEPTH_NESTING;
netdev_lockdep_set_classes(bond_dev);
list_add_tail(&bond->bond_list, &bn->dev_list); list_add_tail(&bond->bond_list, &bn->dev_list);

18
drivers/net/ethernet/netronome/nfp/nfp_net_repr.c
View File

@ -299,22 +299,6 @@ static void nfp_repr_clean(struct nfp_repr *repr)
nfp_port_free(repr->port); nfp_port_free(repr->port);
} }
static struct lock_class_key nfp_repr_netdev_xmit_lock_key;
static struct lock_class_key nfp_repr_netdev_addr_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)
{
lockdep_set_class(&dev->addr_list_lock, &nfp_repr_netdev_addr_lock_key);
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, int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
u32 cmsg_port_id, struct nfp_port *port, u32 cmsg_port_id, struct nfp_port *port,
struct net_device *pf_netdev) struct net_device *pf_netdev)
@ -324,8 +308,6 @@ int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
u32 repr_cap = nn->tlv_caps.repr_cap; u32 repr_cap = nn->tlv_caps.repr_cap;
int err; int err;
nfp_repr_set_lockdep_class(netdev);
repr->port = port; repr->port = port;
repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL); repr->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX, GFP_KERNEL);
if (!repr->dst) if (!repr->dst)

22
drivers/net/hamradio/bpqether.c
View File

@ -107,27 +107,6 @@ struct bpqdev {
static LIST_HEAD(bpq_devices); 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 struct lock_class_key bpq_netdev_addr_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)
{
lockdep_set_class(&dev->addr_list_lock, &bpq_netdev_addr_lock_key);
netdev_for_each_tx_queue(dev, bpq_set_lockdep_class_one, NULL);
}
/* ------------------------------------------------------------------------ */ /* ------------------------------------------------------------------------ */
@ -498,7 +477,6 @@ static int bpq_new_device(struct net_device *edev)
err = register_netdevice(ndev); err = register_netdevice(ndev);
if (err) if (err)
goto error; goto error;
bpq_set_lockdep_class(ndev);
/* List protected by RTNL */ /* List protected by RTNL */
list_add_rcu(&bpq->bpq_list, &bpq_devices); list_add_rcu(&bpq->bpq_list, &bpq_devices);

2
drivers/net/hyperv/netvsc_drv.c
View File

@ -2335,8 +2335,6 @@ static int netvsc_probe(struct hv_device *dev,
NETIF_F_HW_VLAN_CTAG_RX; NETIF_F_HW_VLAN_CTAG_RX;
net->vlan_features = net->features; net->vlan_features = net->features;
netdev_lockdep_set_classes(net);
/* MTU range: 68 - 1500 or 65521 */ /* MTU range: 68 - 1500 or 65521 */
net->min_mtu = NETVSC_MTU_MIN; net->min_mtu = NETVSC_MTU_MIN;
if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2) if (nvdev->nvsp_version >= NVSP_PROTOCOL_VERSION_2)

2
drivers/net/ipvlan/ipvlan_main.c
View File

@ -131,8 +131,6 @@ static int ipvlan_init(struct net_device *dev)
dev->gso_max_segs = phy_dev->gso_max_segs; dev->gso_max_segs = phy_dev->gso_max_segs;
dev->hard_header_len = phy_dev->hard_header_len; 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); ipvlan->pcpu_stats = netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats);
if (!ipvlan->pcpu_stats) if (!ipvlan->pcpu_stats)
return -ENOMEM; return -ENOMEM;

5
drivers/net/macsec.c
View File

@ -2750,7 +2750,6 @@ static netdev_tx_t macsec_start_xmit(struct sk_buff *skb,
#define MACSEC_FEATURES \ #define MACSEC_FEATURES \
(NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST) (NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST)
static struct lock_class_key macsec_netdev_addr_lock_key;
static int macsec_dev_init(struct net_device *dev) static int macsec_dev_init(struct net_device *dev)
{ {
@ -3264,10 +3263,6 @@ static int macsec_newlink(struct net *net, struct net_device *dev,
dev_hold(real_dev); dev_hold(real_dev);
macsec->nest_level = dev_get_nest_level(real_dev) + 1; macsec->nest_level = dev_get_nest_level(real_dev) + 1;
netdev_lockdep_set_classes(dev);
lockdep_set_class_and_subclass(&dev->addr_list_lock,
&macsec_netdev_addr_lock_key,
macsec_get_nest_level(dev));
err = netdev_upper_dev_link(real_dev, dev, extack); err = netdev_upper_dev_link(real_dev, dev, extack);
if (err < 0) if (err < 0)

12
drivers/net/macvlan.c
View File

@ -852,8 +852,6 @@ static int macvlan_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
* "super class" of normal network devices; split their locks off into a * "super class" of normal network devices; split their locks off into a
* separate class since they always nest. * separate class since they always nest.
*/ */
static struct lock_class_key macvlan_netdev_addr_lock_key;
#define ALWAYS_ON_OFFLOADS \ #define ALWAYS_ON_OFFLOADS \
(NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \
NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL) NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL)
@ -874,14 +872,6 @@ static int macvlan_get_nest_level(struct net_device *dev)
return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; return ((struct macvlan_dev *)netdev_priv(dev))->nest_level;
} }
static void macvlan_set_lockdep_class(struct net_device *dev)
{
netdev_lockdep_set_classes(dev);
lockdep_set_class_and_subclass(&dev->addr_list_lock,
&macvlan_netdev_addr_lock_key,
macvlan_get_nest_level(dev));
}
static int macvlan_init(struct net_device *dev) static int macvlan_init(struct net_device *dev)
{ {
struct macvlan_dev *vlan = netdev_priv(dev); struct macvlan_dev *vlan = netdev_priv(dev);
@ -900,8 +890,6 @@ static int macvlan_init(struct net_device *dev)
dev->gso_max_segs = lowerdev->gso_max_segs; dev->gso_max_segs = lowerdev->gso_max_segs;
dev->hard_header_len = lowerdev->hard_header_len; dev->hard_header_len = lowerdev->hard_header_len;
macvlan_set_lockdep_class(dev);
vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
if (!vlan->pcpu_stats) if (!vlan->pcpu_stats)
return -ENOMEM; return -ENOMEM;

2
drivers/net/ppp/ppp_generic.c
View File

@ -1324,8 +1324,6 @@ static int ppp_dev_init(struct net_device *dev)
{ {
struct ppp *ppp; struct ppp *ppp;
netdev_lockdep_set_classes(dev);
ppp = netdev_priv(dev); ppp = netdev_priv(dev);
/* Let the netdevice take a reference on the ppp file. This ensures /* Let the netdevice take a reference on the ppp file. This ensures
* that ppp_destroy_interface() won't run before the device gets * that ppp_destroy_interface() won't run before the device gets

2
drivers/net/team/team.c
View File

@ -1642,8 +1642,6 @@ static int team_init(struct net_device *dev)
goto err_options_register; goto err_options_register;
netif_carrier_off(dev); netif_carrier_off(dev);
netdev_lockdep_set_classes(dev);
return 0; return 0;
err_options_register: err_options_register:

1
drivers/net/vrf.c
View File

@ -865,7 +865,6 @@ static int vrf_dev_init(struct net_device *dev)
/* similarly, oper state is irrelevant; set to up to avoid confusion */ /* similarly, oper state is irrelevant; set to up to avoid confusion */
dev->operstate = IF_OPER_UP; dev->operstate = IF_OPER_UP;
netdev_lockdep_set_classes(dev);
return 0; return 0;
out_rth: out_rth:

25
drivers/net/wireless/intersil/hostap/hostap_hw.c
View File

@ -3041,30 +3041,6 @@ 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 struct lock_class_key hostap_netdev_addr_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)
{
lockdep_set_class(&dev->addr_list_lock,
&hostap_netdev_addr_lock_key);
netdev_for_each_tx_queue(dev, prism2_set_lockdep_class_one, NULL);
}
static struct net_device * static struct net_device *
prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx, prism2_init_local_data(struct prism2_helper_functions *funcs, int card_idx,
struct device *sdev) struct device *sdev)
@ -3223,7 +3199,6 @@ while (0)
if (ret >= 0) if (ret >= 0)
ret = register_netdevice(dev); ret = register_netdevice(dev);
prism2_set_lockdep_class(dev);
rtnl_unlock(); rtnl_unlock();
if (ret < 0) { if (ret < 0) {
printk(KERN_WARNING "%s: register netdevice failed!\n", printk(KERN_WARNING "%s: register netdevice failed!\n",

33
include/linux/netdevice.h
View File

@ -925,6 +925,7 @@ struct dev_ifalias {
struct devlink; struct devlink;
struct tlsdev_ops; struct tlsdev_ops;
/* /*
* This structure defines the management hooks for network devices. * This structure defines the management hooks for network devices.
* The following hooks can be defined; unless noted otherwise, they are * The following hooks can be defined; unless noted otherwise, they are
@ -1760,9 +1761,13 @@ enum netdev_priv_flags {
* @phydev: Physical device may attach itself * @phydev: Physical device may attach itself
* for hardware timestamping * for hardware timestamping
* @sfp_bus: attached &struct sfp_bus structure. * @sfp_bus: attached &struct sfp_bus structure.
* * @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock
* @qdisc_tx_busylock: lockdep class annotating Qdisc->busylock spinlock spinlock
* @qdisc_running_key: lockdep class annotating Qdisc->running seqcount * @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
* *
* @proto_down: protocol port state information can be sent to the * @proto_down: protocol port state information can be sent to the
* switch driver and used to set the phys state of the * switch driver and used to set the phys state of the
@ -2049,8 +2054,10 @@ struct net_device {
#endif #endif
struct phy_device *phydev; struct phy_device *phydev;
struct sfp_bus *sfp_bus; struct sfp_bus *sfp_bus;
struct lock_class_key *qdisc_tx_busylock; struct lock_class_key qdisc_tx_busylock_key;
struct lock_class_key *qdisc_running_key; struct lock_class_key qdisc_running_key;
struct lock_class_key qdisc_xmit_lock_key;
struct lock_class_key addr_list_lock_key;
bool proto_down; bool proto_down;
unsigned wol_enabled:1; unsigned wol_enabled:1;
}; };
@ -2128,23 +2135,6 @@ static inline void netdev_for_each_tx_queue(struct net_device *dev,
f(dev, &dev->_tx[i], arg); 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; \
static struct lock_class_key dev_addr_list_lock_key; \
unsigned int i; \
\
(dev)->qdisc_tx_busylock = &qdisc_tx_busylock_key; \
(dev)->qdisc_running_key = &qdisc_running_key; \
lockdep_set_class(&(dev)->addr_list_lock, \
&dev_addr_list_lock_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, u16 netdev_pick_tx(struct net_device *dev, struct sk_buff *skb,
struct net_device *sb_dev); struct net_device *sb_dev);
struct netdev_queue *netdev_core_pick_tx(struct net_device *dev, struct netdev_queue *netdev_core_pick_tx(struct net_device *dev,
@ -3143,6 +3133,7 @@ static inline void netif_stop_queue(struct net_device *dev)
} }
void netif_tx_stop_all_queues(struct net_device *dev); void netif_tx_stop_all_queues(struct net_device *dev);
void netdev_update_lockdep_key(struct net_device *dev);
static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue) static inline bool netif_tx_queue_stopped(const struct netdev_queue *dev_queue)
{ {

27
net/8021q/vlan_dev.c
View File

@ -489,31 +489,6 @@ static void vlan_dev_set_rx_mode(struct net_device *vlan_dev)
dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, 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 struct lock_class_key vlan_netdev_addr_lock_key;
static void vlan_dev_set_lockdep_one(struct net_device *dev,
struct netdev_queue *txq,
void *_subclass)
{
lockdep_set_class_and_subclass(&txq->_xmit_lock,
&vlan_netdev_xmit_lock_key,
*(int *)_subclass);
}
static void vlan_dev_set_lockdep_class(struct net_device *dev, int subclass)
{
lockdep_set_class_and_subclass(&dev->addr_list_lock,
&vlan_netdev_addr_lock_key,
subclass);
netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, &subclass);
}
static int vlan_dev_get_lock_subclass(struct net_device *dev) static int vlan_dev_get_lock_subclass(struct net_device *dev)
{ {
return vlan_dev_priv(dev)->nest_level; return vlan_dev_priv(dev)->nest_level;
@ -609,8 +584,6 @@ static int vlan_dev_init(struct net_device *dev)
SET_NETDEV_DEVTYPE(dev, &vlan_type); SET_NETDEV_DEVTYPE(dev, &vlan_type);
vlan_dev_set_lockdep_class(dev, vlan_dev_get_lock_subclass(dev));
vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
if (!vlan->vlan_pcpu_stats) if (!vlan->vlan_pcpu_stats)
return -ENOMEM; return -ENOMEM;

32
net/batman-adv/soft-interface.c
View File

@ -740,36 +740,6 @@ static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
return 0; 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;
static struct lock_class_key batadv_netdev_addr_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)
{
lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
}
/** /**
* batadv_softif_init_late() - late stage initialization of soft interface * batadv_softif_init_late() - late stage initialization of soft interface
* @dev: registered network device to modify * @dev: registered network device to modify
@ -783,8 +753,6 @@ static int batadv_softif_init_late(struct net_device *dev)
int ret; int ret;
size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM; size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM;
batadv_set_lockdep_class(dev);
bat_priv = netdev_priv(dev); bat_priv = netdev_priv(dev);
bat_priv->soft_iface = dev; bat_priv->soft_iface = dev;

8
net/bluetooth/6lowpan.c
View File

@ -571,15 +571,7 @@ static netdev_tx_t bt_xmit(struct sk_buff *skb, struct net_device *netdev)
return err < 0 ? NET_XMIT_DROP : err; 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 = { static const struct net_device_ops netdev_ops = {
.ndo_init = bt_dev_init,
.ndo_start_xmit = bt_xmit, .ndo_start_xmit = bt_xmit,
}; };

8
net/bridge/br_device.c
View File

@ -24,8 +24,6 @@
const struct nf_br_ops __rcu *nf_br_ops __read_mostly; const struct nf_br_ops __rcu *nf_br_ops __read_mostly;
EXPORT_SYMBOL_GPL(nf_br_ops); EXPORT_SYMBOL_GPL(nf_br_ops);
static struct lock_class_key bridge_netdev_addr_lock_key;
/* net device transmit always called with BH disabled */ /* net device transmit always called with BH disabled */
netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
{ {
@ -108,11 +106,6 @@ out:
return NETDEV_TX_OK; return NETDEV_TX_OK;
} }
static void br_set_lockdep_class(struct net_device *dev)
{
lockdep_set_class(&dev->addr_list_lock, &bridge_netdev_addr_lock_key);
}
static int br_dev_init(struct net_device *dev) static int br_dev_init(struct net_device *dev)
{ {
struct net_bridge *br = netdev_priv(dev); struct net_bridge *br = netdev_priv(dev);
@ -150,7 +143,6 @@ static int br_dev_init(struct net_device *dev)
br_mdb_hash_fini(br); br_mdb_hash_fini(br);
br_fdb_hash_fini(br); br_fdb_hash_fini(br);
} }
br_set_lockdep_class(dev);
return err; return err;
} }

127
net/core/dev.c
View File

@ -277,88 +277,6 @@ static RAW_NOTIFIER_HEAD(netdev_chain);
DEFINE_PER_CPU_ALIGNED(struct softnet_data, softnet_data); DEFINE_PER_CPU_ALIGNED(struct softnet_data, softnet_data);
EXPORT_PER_CPU_SYMBOL(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 struct lock_class_key netdev_addr_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]);
}
static inline void netdev_set_addr_lockdep_class(struct net_device *dev)
{
int i;
i = netdev_lock_pos(dev->type);
lockdep_set_class_and_name(&dev->addr_list_lock,
&netdev_addr_lock_key[i],
netdev_lock_name[i]);
}
#else
static inline void netdev_set_xmit_lockdep_class(spinlock_t *lock,
unsigned short dev_type)
{
}
static inline void netdev_set_addr_lockdep_class(struct net_device *dev)
{
}
#endif
/******************************************************************************* /*******************************************************************************
* *
* Protocol management and registration routines * Protocol management and registration routines
@ -8799,7 +8717,7 @@ static void netdev_init_one_queue(struct net_device *dev,
{ {
/* Initialize queue lock */ /* Initialize queue lock */
spin_lock_init(&queue->_xmit_lock); spin_lock_init(&queue->_xmit_lock);
netdev_set_xmit_lockdep_class(&queue->_xmit_lock, dev->type); lockdep_set_class(&queue->_xmit_lock, &dev->qdisc_xmit_lock_key);
queue->xmit_lock_owner = -1; queue->xmit_lock_owner = -1;
netdev_queue_numa_node_write(queue, NUMA_NO_NODE); netdev_queue_numa_node_write(queue, NUMA_NO_NODE);
queue->dev = dev; queue->dev = dev;
@ -8846,6 +8764,43 @@ void netif_tx_stop_all_queues(struct net_device *dev)
} }
EXPORT_SYMBOL(netif_tx_stop_all_queues); 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)
{
struct netdev_queue *queue;
int i;
lockdep_unregister_key(&dev->qdisc_xmit_lock_key);
lockdep_unregister_key(&dev->addr_list_lock_key);
lockdep_register_key(&dev->qdisc_xmit_lock_key);
lockdep_register_key(&dev->addr_list_lock_key);
lockdep_set_class(&dev->addr_list_lock, &dev->addr_list_lock_key);
for (i = 0; i < dev->num_tx_queues; i++) {
queue = netdev_get_tx_queue(dev, i);
lockdep_set_class(&queue->_xmit_lock,
&dev->qdisc_xmit_lock_key);
}
}
EXPORT_SYMBOL(netdev_update_lockdep_key);
/** /**
* register_netdevice - register a network device * register_netdevice - register a network device
* @dev: device to register * @dev: device to register
@ -8880,7 +8835,7 @@ int register_netdevice(struct net_device *dev)
BUG_ON(!net); BUG_ON(!net);
spin_lock_init(&dev->addr_list_lock); spin_lock_init(&dev->addr_list_lock);
netdev_set_addr_lockdep_class(dev); lockdep_set_class(&dev->addr_list_lock, &dev->addr_list_lock_key);
ret = dev_get_valid_name(net, dev, dev->name); ret = dev_get_valid_name(net, dev, dev->name);
if (ret < 0) if (ret < 0)
@ -9390,6 +9345,8 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name,
dev_net_set(dev, &init_net); dev_net_set(dev, &init_net);
netdev_register_lockdep_key(dev);
dev->gso_max_size = GSO_MAX_SIZE; dev->gso_max_size = GSO_MAX_SIZE;
dev->gso_max_segs = GSO_MAX_SEGS; dev->gso_max_segs = GSO_MAX_SEGS;
dev->upper_level = 1; dev->upper_level = 1;
@ -9474,6 +9431,8 @@ void free_netdev(struct net_device *dev)
free_percpu(dev->pcpu_refcnt); free_percpu(dev->pcpu_refcnt);
dev->pcpu_refcnt = NULL; dev->pcpu_refcnt = NULL;
netdev_unregister_lockdep_key(dev);
/* Compatibility with error handling in drivers */ /* Compatibility with error handling in drivers */
if (dev->reg_state == NETREG_UNINITIALIZED) { if (dev->reg_state == NETREG_UNINITIALIZED) {
netdev_freemem(dev); netdev_freemem(dev);

1
net/core/rtnetlink.c
View File

@ -2355,6 +2355,7 @@ static int do_set_master(struct net_device *dev, int ifindex,
err = ops->ndo_del_slave(upper_dev, dev); err = ops->ndo_del_slave(upper_dev, dev);
if (err) if (err)
return err; return err;
netdev_update_lockdep_key(dev);
} else { } else {
return -EOPNOTSUPP; return -EOPNOTSUPP;
} }

5
net/dsa/master.c
View File

@ -310,8 +310,6 @@ static void dsa_master_reset_mtu(struct net_device *dev)
rtnl_unlock(); rtnl_unlock();
} }
static struct lock_class_key dsa_master_addr_list_lock_key;
int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp) int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
{ {
int ret; int ret;
@ -325,9 +323,6 @@ int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
wmb(); wmb();
dev->dsa_ptr = cpu_dp; dev->dsa_ptr = cpu_dp;
lockdep_set_class(&dev->addr_list_lock,
&dsa_master_addr_list_lock_key);
ret = dsa_master_ethtool_setup(dev); ret = dsa_master_ethtool_setup(dev);
if (ret) if (ret)
return ret; return ret;

12
net/dsa/slave.c
View File

@ -1341,15 +1341,6 @@ static int dsa_slave_phy_setup(struct net_device *slave_dev)
return ret; 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) int dsa_slave_suspend(struct net_device *slave_dev)
{ {
struct dsa_port *dp = dsa_slave_to_port(slave_dev); struct dsa_port *dp = dsa_slave_to_port(slave_dev);
@ -1433,9 +1424,6 @@ int dsa_slave_create(struct dsa_port *port)
slave_dev->max_mtu = ETH_MAX_MTU; slave_dev->max_mtu = ETH_MAX_MTU;
SET_NETDEV_DEVTYPE(slave_dev, &dsa_type); 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); SET_NETDEV_DEV(slave_dev, port->ds->dev);
slave_dev->dev.of_node = port->dn; slave_dev->dev.of_node = port->dn;
slave_dev->vlan_features = master->vlan_features; slave_dev->vlan_features = master->vlan_features;

8
net/ieee802154/6lowpan/core.c
View File

@ -58,13 +58,6 @@ static const struct header_ops lowpan_header_ops = {
.create = lowpan_header_create, .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) static int lowpan_open(struct net_device *dev)
{ {
if (!open_count) if (!open_count)
@ -96,7 +89,6 @@ static int lowpan_get_iflink(const struct net_device *dev)
} }
static const struct net_device_ops lowpan_netdev_ops = { static const struct net_device_ops lowpan_netdev_ops = {
.ndo_init = lowpan_dev_init,
.ndo_start_xmit = lowpan_xmit, .ndo_start_xmit = lowpan_xmit,
.ndo_open = lowpan_open, .ndo_open = lowpan_open,
.ndo_stop = lowpan_stop, .ndo_stop = lowpan_stop,

1
net/l2tp/l2tp_eth.c
View File

@ -56,7 +56,6 @@ static int l2tp_eth_dev_init(struct net_device *dev)
{ {
eth_hw_addr_random(dev); eth_hw_addr_random(dev);
eth_broadcast_addr(dev->broadcast); eth_broadcast_addr(dev->broadcast);
netdev_lockdep_set_classes(dev);
return 0; return 0;
} }

23
net/netrom/af_netrom.c
View File

@ -63,28 +63,6 @@ static DEFINE_SPINLOCK(nr_list_lock);
static const struct proto_ops nr_proto_ops; 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 struct lock_class_key nr_netdev_addr_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)
{
lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key);
netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL);
}
/* /*
* Socket removal during an interrupt is now safe. * Socket removal during an interrupt is now safe.
*/ */
@ -1414,7 +1392,6 @@ static int __init nr_proto_init(void)
free_netdev(dev); free_netdev(dev);
goto fail; goto fail;
} }
nr_set_lockdep_key(dev);
dev_nr[i] = dev; dev_nr[i] = dev;
} }

23
net/rose/af_rose.c
View File

@ -64,28 +64,6 @@ static const struct proto_ops rose_proto_ops;
ax25_address rose_callsign; 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 struct lock_class_key rose_netdev_addr_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)
{
lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
}
/* /*
* Convert a ROSE address into text. * Convert a ROSE address into text.
*/ */
@ -1533,7 +1511,6 @@ static int __init rose_proto_init(void)
free_netdev(dev); free_netdev(dev);
goto fail; goto fail;
} }
rose_set_lockdep_key(dev);
dev_rose[i] = dev; dev_rose[i] = dev;
} }

17
net/sched/sch_generic.c
View File

@ -799,9 +799,6 @@ struct Qdisc_ops pfifo_fast_ops __read_mostly = {
}; };
EXPORT_SYMBOL(pfifo_fast_ops); 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, struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
const struct Qdisc_ops *ops, const struct Qdisc_ops *ops,
struct netlink_ext_ack *extack) struct netlink_ext_ack *extack)
@ -854,17 +851,9 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
} }
spin_lock_init(&sch->busylock); 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 */ /* seqlock has the same scope of busylock, for NOLOCK qdisc */
spin_lock_init(&sch->seqlock); spin_lock_init(&sch->seqlock);
lockdep_set_class(&sch->busylock,
dev->qdisc_tx_busylock ?: &qdisc_tx_busylock);
seqcount_init(&sch->running); seqcount_init(&sch->running);
lockdep_set_class(&sch->running,
dev->qdisc_running_key ?: &qdisc_running_key);
sch->ops = ops; sch->ops = ops;
sch->flags = ops->static_flags; sch->flags = ops->static_flags;
@ -875,6 +864,12 @@ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,
dev_hold(dev); dev_hold(dev);
refcount_set(&sch->refcnt, 1); 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; return sch;
errout1: errout1:
kfree(p); kfree(p);