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Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

Browse Source 
* 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (25 commits)
  [TG3]: Fix msi issue with kexec/kdump.
  [NET] XFRM: Fix whitespace errors.
  [NET] TIPC: Fix whitespace errors.
  [NET] SUNRPC: Fix whitespace errors.
  [NET] SCTP: Fix whitespace errors.
  [NET] RXRPC: Fix whitespace errors.
  [NET] ROSE: Fix whitespace errors.
  [NET] RFKILL: Fix whitespace errors.
  [NET] PACKET: Fix whitespace errors.
  [NET] NETROM: Fix whitespace errors.
  [NET] NETFILTER: Fix whitespace errors.
  [NET] IPV4: Fix whitespace errors.
  [NET] DCCP: Fix whitespace errors.
  [NET] CORE: Fix whitespace errors.
  [NET] BLUETOOTH: Fix whitespace errors.
  [NET] AX25: Fix whitespace errors.
  [PATCH] mac80211: remove rtnl locking in ieee80211_sta.c
  [PATCH] mac80211: fix GCC warning on 64bit platforms
  [GENETLINK]: Dynamic multicast groups.
  [NETLIKN]: Allow removing multicast groups.
  ...
This commit is contained in:
Linus Torvalds
2007-07-19 10:23:21 -07:00
parent 41e9d344bf ee6a99b539
commit ce8c2293be
37 changed files with 663 additions and 270 deletions
Download Patch File Download Diff File Expand all files Collapse all files
net/ax25/af_ax25.c
+1 -1
View File
@@ -1262,7 +1262,7 @@ static int __must_check ax25_connect(struct socket *sock,
for (;;) {
prepare_to_wait(sk->sk_sleep, &wait,
TASK_INTERRUPTIBLE);
TASK_INTERRUPTIBLE);
if (sk->sk_state != TCP_SYN_SENT)
break;
if (!signal_pending(current)) {
net/bluetooth/hci_core.c
+1 -1
View File
@@ -982,7 +982,7 @@ int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
skb->dev = (void *) hdev;
bt_cb(skb)->pkt_type = type;
__reassembly(hdev, type) = skb;
scb = (void *) skb->cb;
net/core/dev.c
+1 -1
View File
@@ -2629,7 +2629,7 @@ void __dev_set_rx_mode(struct net_device *dev)
return;
if (!netif_device_present(dev))
return;
return;
if (dev->set_rx_mode)
dev->set_rx_mode(dev);
net/core/rtnetlink.c
+1 -1
View File
@@ -98,7 +98,7 @@ int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
}
int __rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr,
struct rtattr *rta, int len)
struct rtattr *rta, int len)
{
if (RTA_PAYLOAD(rta) < len)
return -1;
net/core/sock.c
+1 -1
View File
@@ -230,7 +230,7 @@ static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
warned++;
printk(KERN_INFO "sock_set_timeout: `%s' (pid %d) "
"tries to set negative timeout\n",
current->comm, current->pid);
current->comm, current->pid);
return 0;
}
*timeo_p = MAX_SCHEDULE_TIMEOUT;
net/dccp/ccids/lib/loss_interval.c
+1 -1
View File
@@ -227,7 +227,7 @@ void dccp_li_update_li(struct sock *sk,
struct list_head *li_hist_list,
struct list_head *hist_list,
struct timeval *last_feedback, u16 s, u32 bytes_recv,
u32 previous_x_recv, u64 seq_loss, u8 win_loss)
u32 previous_x_recv, u64 seq_loss, u8 win_loss)
{
struct dccp_li_hist_entry *head;
u64 seq_temp;
net/ipv4/fib_frontend.c
+1 -1
View File
@@ -817,7 +817,7 @@ static void nl_fib_input(struct sock *sk, int len)
static void nl_fib_lookup_init(void)
{
netlink_kernel_create(NETLINK_FIB_LOOKUP, 0, nl_fib_input, NULL,
THIS_MODULE);
THIS_MODULE);
}
static void fib_disable_ip(struct net_device *dev, int force)
net/ipv4/ip_forward.c
+1 -1
View File
@@ -86,7 +86,7 @@ int ip_forward(struct sk_buff *skb)
goto sr_failed;
if (unlikely(skb->len > dst_mtu(&rt->u.dst) &&
(ip_hdr(skb)->frag_off & htons(IP_DF))) && !skb->local_df) {
(ip_hdr(skb)->frag_off & htons(IP_DF))) && !skb->local_df) {
IP_INC_STATS(IPSTATS_MIB_FRAGFAILS);
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
htonl(dst_mtu(&rt->u.dst)));
net/ipv4/tcp_output.c
+1 -1
View File
@@ -1615,7 +1615,7 @@ u32 __tcp_select_window(struct sock *sk)
if (window <= free_space - mss || window > free_space)
window = (free_space/mss)*mss;
else if (mss == full_space &&
free_space > window + full_space/2)
free_space > window + full_space/2)
window = free_space;
}
net/mac80211/Makefile
+1
View File
@@ -13,6 +13,7 @@ mac80211-objs := \
ieee80211_iface.o \
ieee80211_rate.o \
michael.o \
regdomain.o \
tkip.o \
aes_ccm.o \
wme.o \
net/mac80211/debugfs_netdev.c
+6 -3
View File
@@ -397,6 +397,8 @@ static int netdev_notify(struct notifier_block * nb,
void *ndev)
{
struct net_device *dev = ndev;
struct dentry *dir;
struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
char buf[10+IFNAMSIZ];
if (state != NETDEV_CHANGENAME)
@@ -408,10 +410,11 @@ static int netdev_notify(struct notifier_block * nb,
if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
return 0;
/* TODO
sprintf(buf, "netdev:%s", dev->name);
debugfs_rename(IEEE80211_DEV_TO_SUB_IF(dev)->debugfsdir, buf);
*/
dir = sdata->debugfsdir;
if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
"dir to %s\n", buf);
return 0;
}
net/mac80211/ieee80211.c
+4 -3
View File
@@ -4986,8 +4986,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
* and we need some headroom for passing the frame to monitor
* interfaces, but never both at the same time.
*/
local->tx_headroom = max(local->hw.extra_tx_headroom,
sizeof(struct ieee80211_tx_status_rtap_hdr));
local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
sizeof(struct ieee80211_tx_status_rtap_hdr));
debugfs_hw_add(local);
@@ -5095,7 +5095,7 @@ int ieee80211_register_hwmode(struct ieee80211_hw *hw,
}
if (!(hw->flags & IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED))
ieee80211_init_client(local->mdev);
ieee80211_set_default_regdomain(mode);
return 0;
}
@@ -5246,6 +5246,7 @@ static int __init ieee80211_init(void)
}
ieee80211_debugfs_netdev_init();
ieee80211_regdomain_init();
return 0;
}
net/mac80211/ieee80211_i.h
+4 -1
View File
@@ -759,7 +759,6 @@ void ieee80211_update_default_wep_only(struct ieee80211_local *local);
/* ieee80211_ioctl.c */
int ieee80211_set_compression(struct ieee80211_local *local,
struct net_device *dev, struct sta_info *sta);
int ieee80211_init_client(struct net_device *dev);
int ieee80211_set_channel(struct ieee80211_local *local, int channel, int freq);
/* ieee80211_sta.c */
void ieee80211_sta_timer(unsigned long data);
@@ -798,6 +797,10 @@ void ieee80211_if_sdata_init(struct ieee80211_sub_if_data *sdata);
int ieee80211_if_add_mgmt(struct ieee80211_local *local);
void ieee80211_if_del_mgmt(struct ieee80211_local *local);
/* regdomain.c */
void ieee80211_regdomain_init(void);
void ieee80211_set_default_regdomain(struct ieee80211_hw_mode *mode);
/* for wiphy privid */
extern void *mac80211_wiphy_privid;
net/mac80211/ieee80211_ioctl.c
-133
View File
@@ -27,20 +27,6 @@
#include "aes_ccm.h"
#include "debugfs_key.h"
static int ieee80211_regdom = 0x10; /* FCC */
module_param(ieee80211_regdom, int, 0444);
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain; 64=MKK");
/*
* If firmware is upgraded by the vendor, additional channels can be used based
* on the new Japanese regulatory rules. This is indicated by setting
* ieee80211_japan_5ghz module parameter to one when loading the 80211 kernel
* module.
*/
static int ieee80211_japan_5ghz /* = 0 */;
module_param(ieee80211_japan_5ghz, int, 0444);
MODULE_PARM_DESC(ieee80211_japan_5ghz, "Vendor-updated firmware for 5 GHz");
static void ieee80211_set_hw_encryption(struct net_device *dev,
struct sta_info *sta, u8 addr[ETH_ALEN],
struct ieee80211_key *key)
@@ -412,125 +398,6 @@ static int ieee80211_ioctl_giwrange(struct net_device *dev,
}
struct ieee80211_channel_range {
short start_freq;
short end_freq;
unsigned char power_level;
unsigned char antenna_max;
};
static const struct ieee80211_channel_range ieee80211_fcc_channels[] = {
{ 2412, 2462, 27, 6 } /* IEEE 802.11b/g, channels 1..11 */,
{ 5180, 5240, 17, 6 } /* IEEE 802.11a, channels 36..48 */,
{ 5260, 5320, 23, 6 } /* IEEE 802.11a, channels 52..64 */,
{ 5745, 5825, 30, 6 } /* IEEE 802.11a, channels 149..165, outdoor */,
{ 0 }
};
static const struct ieee80211_channel_range ieee80211_mkk_channels[] = {
{ 2412, 2472, 20, 6 } /* IEEE 802.11b/g, channels 1..13 */,
{ 5170, 5240, 20, 6 } /* IEEE 802.11a, channels 34..48 */,
{ 5260, 5320, 20, 6 } /* IEEE 802.11a, channels 52..64 */,
{ 0 }
};
static const struct ieee80211_channel_range *channel_range =
ieee80211_fcc_channels;
static void ieee80211_unmask_channel(struct net_device *dev, int mode,
struct ieee80211_channel *chan)
{
int i;
chan->flag = 0;
if (ieee80211_regdom == 64 &&
(mode == MODE_ATHEROS_TURBO || mode == MODE_ATHEROS_TURBOG)) {
/* Do not allow Turbo modes in Japan. */
return;
}
for (i = 0; channel_range[i].start_freq; i++) {
const struct ieee80211_channel_range *r = &channel_range[i];
if (r->start_freq <= chan->freq && r->end_freq >= chan->freq) {
if (ieee80211_regdom == 64 && !ieee80211_japan_5ghz &&
chan->freq >= 5260 && chan->freq <= 5320) {
/*
* Skip new channels in Japan since the
* firmware was not marked having been upgraded
* by the vendor.
*/
continue;
}
if (ieee80211_regdom == 0x10 &&
(chan->freq == 5190 || chan->freq == 5210 ||
chan->freq == 5230)) {
/* Skip MKK channels when in FCC domain. */
continue;
}
chan->flag |= IEEE80211_CHAN_W_SCAN |
IEEE80211_CHAN_W_ACTIVE_SCAN |
IEEE80211_CHAN_W_IBSS;
chan->power_level = r->power_level;
chan->antenna_max = r->antenna_max;
if (ieee80211_regdom == 64 &&
(chan->freq == 5170 || chan->freq == 5190 ||
chan->freq == 5210 || chan->freq == 5230)) {
/*
* New regulatory rules in Japan have backwards
* compatibility with old channels in 5.15-5.25
* GHz band, but the station is not allowed to
* use active scan on these old channels.
*/
chan->flag &= ~IEEE80211_CHAN_W_ACTIVE_SCAN;
}
if (ieee80211_regdom == 64 &&
(chan->freq == 5260 || chan->freq == 5280 ||
chan->freq == 5300 || chan->freq == 5320)) {
/*
* IBSS is not allowed on 5.25-5.35 GHz band
* due to radar detection requirements.
*/
chan->flag &= ~IEEE80211_CHAN_W_IBSS;
}
break;
}
}
}
static int ieee80211_unmask_channels(struct net_device *dev)
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
struct ieee80211_hw_mode *mode;
int c;
list_for_each_entry(mode, &local->modes_list, list) {
for (c = 0; c < mode->num_channels; c++) {
ieee80211_unmask_channel(dev, mode->mode,
&mode->channels[c]);
}
}
return 0;
}
int ieee80211_init_client(struct net_device *dev)
{
if (ieee80211_regdom == 0x40)
channel_range = ieee80211_mkk_channels;
ieee80211_unmask_channels(dev);
return 0;
}
static int ieee80211_ioctl_siwmode(struct net_device *dev,
struct iw_request_info *info,
__u32 *mode, char *extra)
net/mac80211/ieee80211_sta.c
-6
View File
@@ -25,7 +25,6 @@
#include <linux/wireless.h>
#include <linux/random.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <net/iw_handler.h>
#include <asm/types.h>
@@ -2106,12 +2105,9 @@ static int ieee80211_sta_config_auth(struct net_device *dev,
struct ieee80211_sta_bss *bss, *selected = NULL;
int top_rssi = 0, freq;
rtnl_lock();
if (!ifsta->auto_channel_sel && !ifsta->auto_bssid_sel &&
!ifsta->auto_ssid_sel) {
ifsta->state = IEEE80211_AUTHENTICATE;
rtnl_unlock();
ieee80211_sta_reset_auth(dev, ifsta);
return 0;
}
@@ -2154,7 +2150,6 @@ static int ieee80211_sta_config_auth(struct net_device *dev,
ieee80211_sta_set_bssid(dev, selected->bssid);
ieee80211_rx_bss_put(dev, selected);
ifsta->state = IEEE80211_AUTHENTICATE;
rtnl_unlock();
ieee80211_sta_reset_auth(dev, ifsta);
return 0;
} else {
@@ -2165,7 +2160,6 @@ static int ieee80211_sta_config_auth(struct net_device *dev,
} else
ifsta->state = IEEE80211_DISABLED;
}
rtnl_unlock();
return -1;
}
net/mac80211/regdomain.c
+158
View File
@@ -0,0 +1,158 @@
/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005-2006, Devicescape Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/*
* This regulatory domain control implementation is known to be incomplete
* and confusing. mac80211 regulatory domain control will be significantly
* reworked in the not-too-distant future.
*
* For now, drivers wishing to control which channels are and aren't available
* are advised as follows:
* - set the IEEE80211_HW_DEFAULT_REG_DOMAIN_CONFIGURED flag
* - continue to include *ALL* possible channels in the modes registered
* through ieee80211_register_hwmode()
* - for each allowable ieee80211_channel structure registered in the above
* call, set the flag member to some meaningful value such as
* IEEE80211_CHAN_W_SCAN | IEEE80211_CHAN_W_ACTIVE_SCAN |
* IEEE80211_CHAN_W_IBSS.
* - leave flag as 0 for non-allowable channels
*
* The usual implementation is for a driver to read a device EEPROM to
* determine which regulatory domain it should be operating under, then
* looking up the allowable channels in a driver-local table, then performing
* the above.
*/
#include <linux/module.h>
#include <linux/netdevice.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
static int ieee80211_regdom = 0x10; /* FCC */
module_param(ieee80211_regdom, int, 0444);
MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain; 64=MKK");
/*
* If firmware is upgraded by the vendor, additional channels can be used based
* on the new Japanese regulatory rules. This is indicated by setting
* ieee80211_japan_5ghz module parameter to one when loading the 80211 kernel
* module.
*/
static int ieee80211_japan_5ghz /* = 0 */;
module_param(ieee80211_japan_5ghz, int, 0444);
MODULE_PARM_DESC(ieee80211_japan_5ghz, "Vendor-updated firmware for 5 GHz");
struct ieee80211_channel_range {
short start_freq;
short end_freq;
unsigned char power_level;
unsigned char antenna_max;
};
static const struct ieee80211_channel_range ieee80211_fcc_channels[] = {
{ 2412, 2462, 27, 6 } /* IEEE 802.11b/g, channels 1..11 */,
{ 5180, 5240, 17, 6 } /* IEEE 802.11a, channels 36..48 */,
{ 5260, 5320, 23, 6 } /* IEEE 802.11a, channels 52..64 */,
{ 5745, 5825, 30, 6 } /* IEEE 802.11a, channels 149..165, outdoor */,
{ 0 }
};
static const struct ieee80211_channel_range ieee80211_mkk_channels[] = {
{ 2412, 2472, 20, 6 } /* IEEE 802.11b/g, channels 1..13 */,
{ 5170, 5240, 20, 6 } /* IEEE 802.11a, channels 34..48 */,
{ 5260, 5320, 20, 6 } /* IEEE 802.11a, channels 52..64 */,
{ 0 }
};
static const struct ieee80211_channel_range *channel_range =
ieee80211_fcc_channels;
static void ieee80211_unmask_channel(int mode, struct ieee80211_channel *chan)
{
int i;
chan->flag = 0;
if (ieee80211_regdom == 64 &&
(mode == MODE_ATHEROS_TURBO || mode == MODE_ATHEROS_TURBOG)) {
/* Do not allow Turbo modes in Japan. */
return;
}
for (i = 0; channel_range[i].start_freq; i++) {
const struct ieee80211_channel_range *r = &channel_range[i];
if (r->start_freq <= chan->freq && r->end_freq >= chan->freq) {
if (ieee80211_regdom == 64 && !ieee80211_japan_5ghz &&
chan->freq >= 5260 && chan->freq <= 5320) {
/*
* Skip new channels in Japan since the
* firmware was not marked having been upgraded
* by the vendor.
*/
continue;
}
if (ieee80211_regdom == 0x10 &&
(chan->freq == 5190 || chan->freq == 5210 ||
chan->freq == 5230)) {
/* Skip MKK channels when in FCC domain. */
continue;
}
chan->flag |= IEEE80211_CHAN_W_SCAN |
IEEE80211_CHAN_W_ACTIVE_SCAN |
IEEE80211_CHAN_W_IBSS;
chan->power_level = r->power_level;
chan->antenna_max = r->antenna_max;
if (ieee80211_regdom == 64 &&
(chan->freq == 5170 || chan->freq == 5190 ||
chan->freq == 5210 || chan->freq == 5230)) {
/*
* New regulatory rules in Japan have backwards
* compatibility with old channels in 5.15-5.25
* GHz band, but the station is not allowed to
* use active scan on these old channels.
*/
chan->flag &= ~IEEE80211_CHAN_W_ACTIVE_SCAN;
}
if (ieee80211_regdom == 64 &&
(chan->freq == 5260 || chan->freq == 5280 ||
chan->freq == 5300 || chan->freq == 5320)) {
/*
* IBSS is not allowed on 5.25-5.35 GHz band
* due to radar detection requirements.
*/
chan->flag &= ~IEEE80211_CHAN_W_IBSS;
}
break;
}
}
}
void ieee80211_set_default_regdomain(struct ieee80211_hw_mode *mode)
{
int c;
for (c = 0; c < mode->num_channels; c++)
ieee80211_unmask_channel(mode->mode, &mode->channels[c]);
}
void ieee80211_regdomain_init(void)
{
if (ieee80211_regdom == 0x40)
channel_range = ieee80211_mkk_channels;
}
net/netfilter/nf_conntrack_standalone.c
+1 -1
View File
@@ -181,7 +181,7 @@ static int ct_seq_show(struct seq_file *s, void *v)
if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
return -ENOSPC;
return 0;
}
net/netfilter/nf_log.c
+1 -1
View File
@@ -9,7 +9,7 @@
#include "nf_internals.h"
/* Internal logging interface, which relies on the real
/* Internal logging interface, which relies on the real
LOG target modules */
#define NF_LOG_PREFIXLEN 128
net/netlink/af_netlink.c
+126 -35
View File
@@ -62,6 +62,7 @@
#include <net/netlink.h>
#define NLGRPSZ(x) (ALIGN(x, sizeof(unsigned long) * 8) / 8)
#define NLGRPLONGS(x) (NLGRPSZ(x)/sizeof(unsigned long))
struct netlink_sock {
/* struct sock has to be the first member of netlink_sock */
@@ -314,10 +315,12 @@ netlink_update_listeners(struct sock *sk)
unsigned long mask;
unsigned int i;
for (i = 0; i < NLGRPSZ(tbl->groups)/sizeof(unsigned long); i++) {
for (i = 0; i < NLGRPLONGS(tbl->groups); i++) {
mask = 0;
sk_for_each_bound(sk, node, &tbl->mc_list)
mask |= nlk_sk(sk)->groups[i];
sk_for_each_bound(sk, node, &tbl->mc_list) {
if (i < NLGRPLONGS(nlk_sk(sk)->ngroups))
mask |= nlk_sk(sk)->groups[i];
}
tbl->listeners[i] = mask;
}
/* this function is only called with the netlink table "grabbed", which
@@ -555,26 +558,37 @@ netlink_update_subscriptions(struct sock *sk, unsigned int subscriptions)
nlk->subscriptions = subscriptions;
}
static int netlink_alloc_groups(struct sock *sk)
static int netlink_realloc_groups(struct sock *sk)
{
struct netlink_sock *nlk = nlk_sk(sk);
unsigned int groups;
unsigned long *new_groups;
int err = 0;
netlink_lock_table();
netlink_table_grab();
groups = nl_table[sk->sk_protocol].groups;
if (!nl_table[sk->sk_protocol].registered)
if (!nl_table[sk->sk_protocol].registered) {
err = -ENOENT;
netlink_unlock_table();
goto out_unlock;
}
if (err)
return err;
if (nlk->ngroups >= groups)
goto out_unlock;
nlk->groups = kzalloc(NLGRPSZ(groups), GFP_KERNEL);
if (nlk->groups == NULL)
return -ENOMEM;
new_groups = krealloc(nlk->groups, NLGRPSZ(groups), GFP_ATOMIC);
if (new_groups == NULL) {
err = -ENOMEM;
goto out_unlock;
}
memset((char*)new_groups + NLGRPSZ(nlk->ngroups), 0,
NLGRPSZ(groups) - NLGRPSZ(nlk->ngroups));
nlk->groups = new_groups;
nlk->ngroups = groups;
return 0;
out_unlock:
netlink_table_ungrab();
return err;
}
static int netlink_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
@@ -591,11 +605,9 @@ static int netlink_bind(struct socket *sock, struct sockaddr *addr, int addr_len
if (nladdr->nl_groups) {
if (!netlink_capable(sock, NL_NONROOT_RECV))
return -EPERM;
if (nlk->groups == NULL) {
err = netlink_alloc_groups(sk);
if (err)
return err;
}
err = netlink_realloc_groups(sk);
if (err)
return err;
}
if (nlk->pid) {
@@ -839,10 +851,18 @@ retry:
int netlink_has_listeners(struct sock *sk, unsigned int group)
{
int res = 0;
unsigned long *listeners;
BUG_ON(!(nlk_sk(sk)->flags & NETLINK_KERNEL_SOCKET));
rcu_read_lock();
listeners = rcu_dereference(nl_table[sk->sk_protocol].listeners);
if (group - 1 < nl_table[sk->sk_protocol].groups)
res = test_bit(group - 1, nl_table[sk->sk_protocol].listeners);
res = test_bit(group - 1, listeners);
rcu_read_unlock();
return res;
}
EXPORT_SYMBOL_GPL(netlink_has_listeners);
@@ -1007,6 +1027,23 @@ void netlink_set_err(struct sock *ssk, u32 pid, u32 group, int code)
read_unlock(&nl_table_lock);
}
/* must be called with netlink table grabbed */
static void netlink_update_socket_mc(struct netlink_sock *nlk,
unsigned int group,
int is_new)
{
int old, new = !!is_new, subscriptions;
old = test_bit(group - 1, nlk->groups);
subscriptions = nlk->subscriptions - old + new;
if (new)
__set_bit(group - 1, nlk->groups);
else
__clear_bit(group - 1, nlk->groups);
netlink_update_subscriptions(&nlk->sk, subscriptions);
netlink_update_listeners(&nlk->sk);
}
static int netlink_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, int optlen)
{
@@ -1032,27 +1069,16 @@ static int netlink_setsockopt(struct socket *sock, int level, int optname,
break;
case NETLINK_ADD_MEMBERSHIP:
case NETLINK_DROP_MEMBERSHIP: {
unsigned int subscriptions;
int old, new = optname == NETLINK_ADD_MEMBERSHIP ? 1 : 0;
if (!netlink_capable(sock, NL_NONROOT_RECV))
return -EPERM;
if (nlk->groups == NULL) {
err = netlink_alloc_groups(sk);
if (err)
return err;
}
err = netlink_realloc_groups(sk);
if (err)
return err;
if (!val || val - 1 >= nlk->ngroups)
return -EINVAL;
netlink_table_grab();
old = test_bit(val - 1, nlk->groups);
subscriptions = nlk->subscriptions - old + new;
if (new)
__set_bit(val - 1, nlk->groups);
else
__clear_bit(val - 1, nlk->groups);
netlink_update_subscriptions(sk, subscriptions);
netlink_update_listeners(sk);
netlink_update_socket_mc(nlk, val,
optname == NETLINK_ADD_MEMBERSHIP);
netlink_table_ungrab();
err = 0;
break;
@@ -1328,6 +1354,71 @@ out_sock_release:
return NULL;
}
/**
* netlink_change_ngroups - change number of multicast groups
*
* This changes the number of multicast groups that are available
* on a certain netlink family. Note that it is not possible to
* change the number of groups to below 32. Also note that it does
* not implicitly call netlink_clear_multicast_users() when the
* number of groups is reduced.
*
* @sk: The kernel netlink socket, as returned by netlink_kernel_create().
* @groups: The new number of groups.
*/
int netlink_change_ngroups(struct sock *sk, unsigned int groups)
{
unsigned long *listeners, *old = NULL;
struct netlink_table *tbl = &nl_table[sk->sk_protocol];
int err = 0;
if (groups < 32)
groups = 32;
netlink_table_grab();
if (NLGRPSZ(tbl->groups) < NLGRPSZ(groups)) {
listeners = kzalloc(NLGRPSZ(groups), GFP_ATOMIC);
if (!listeners) {
err = -ENOMEM;
goto out_ungrab;
}
old = tbl->listeners;
memcpy(listeners, old, NLGRPSZ(tbl->groups));
rcu_assign_pointer(tbl->listeners, listeners);
}
tbl->groups = groups;
out_ungrab:
netlink_table_ungrab();
synchronize_rcu();
kfree(old);
return err;
}
EXPORT_SYMBOL(netlink_change_ngroups);
/**
* netlink_clear_multicast_users - kick off multicast listeners
*
* This function removes all listeners from the given group.
* @ksk: The kernel netlink socket, as returned by
* netlink_kernel_create().
* @group: The multicast group to clear.
*/
void netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
{
struct sock *sk;
struct hlist_node *node;
struct netlink_table *tbl = &nl_table[ksk->sk_protocol];
netlink_table_grab();
sk_for_each_bound(sk, node, &tbl->mc_list)
netlink_update_socket_mc(nlk_sk(sk), group, 0);
netlink_table_ungrab();
}
EXPORT_SYMBOL(netlink_clear_multicast_users);
void netlink_set_nonroot(int protocol, unsigned int flags)
{
if ((unsigned int)protocol < MAX_LINKS)
net/netlink/genetlink.c
+228 -7
View File
@@ -3,6 +3,7 @@
*
* Authors: Jamal Hadi Salim
* Thomas Graf <tgraf@suug.ch>
* Johannes Berg <johannes@sipsolutions.net>
*/
#include <linux/module.h>
@@ -13,6 +14,7 @@
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/mutex.h>
#include <linux/bitmap.h>
#include <net/sock.h>
#include <net/genetlink.h>
@@ -42,6 +44,16 @@ static void genl_unlock(void)
#define GENL_FAM_TAB_MASK (GENL_FAM_TAB_SIZE - 1)
static struct list_head family_ht[GENL_FAM_TAB_SIZE];
/*
* Bitmap of multicast groups that are currently in use.
*
* To avoid an allocation at boot of just one unsigned long,
* declare it global instead.
* Bit 0 is marked as already used since group 0 is invalid.
*/
static unsigned long mc_group_start = 0x1;
static unsigned long *mc_groups = &mc_group_start;
static unsigned long mc_groups_longs = 1;
static int genl_ctrl_event(int event, void *data);
@@ -116,6 +128,114 @@ static inline u16 genl_generate_id(void)
return id_gen_idx;
}
static struct genl_multicast_group notify_grp;
/**
* genl_register_mc_group - register a multicast group
*
* Registers the specified multicast group and notifies userspace
* about the new group.
*
* Returns 0 on success or a negative error code.
*
* @family: The generic netlink family the group shall be registered for.
* @grp: The group to register, must have a name.
*/
int genl_register_mc_group(struct genl_family *family,
struct genl_multicast_group *grp)
{
int id;
unsigned long *new_groups;
int err;
BUG_ON(grp->name[0] == '\0');
genl_lock();
/* special-case our own group */
if (grp == &notify_grp)
id = GENL_ID_CTRL;
else
id = find_first_zero_bit(mc_groups,
mc_groups_longs * BITS_PER_LONG);
if (id >= mc_groups_longs * BITS_PER_LONG) {
size_t nlen = (mc_groups_longs + 1) * sizeof(unsigned long);
if (mc_groups == &mc_group_start) {
new_groups = kzalloc(nlen, GFP_KERNEL);
if (!new_groups) {
err = -ENOMEM;
goto out;
}
mc_groups = new_groups;
*mc_groups = mc_group_start;
} else {
new_groups = krealloc(mc_groups, nlen, GFP_KERNEL);
if (!new_groups) {
err = -ENOMEM;
goto out;
}
mc_groups = new_groups;
mc_groups[mc_groups_longs] = 0;
}
mc_groups_longs++;
}
err = netlink_change_ngroups(genl_sock,
sizeof(unsigned long) * NETLINK_GENERIC);
if (err)
goto out;
grp->id = id;
set_bit(id, mc_groups);
list_add_tail(&grp->list, &family->mcast_groups);
grp->family = family;
genl_ctrl_event(CTRL_CMD_NEWMCAST_GRP, grp);
out:
genl_unlock();
return 0;
}
EXPORT_SYMBOL(genl_register_mc_group);
/**
* genl_unregister_mc_group - unregister a multicast group
*
* Unregisters the specified multicast group and notifies userspace
* about it. All current listeners on the group are removed.
*
* Note: It is not necessary to unregister all multicast groups before
* unregistering the family, unregistering the family will cause
* all assigned multicast groups to be unregistered automatically.
*
* @family: Generic netlink family the group belongs to.
* @grp: The group to unregister, must have been registered successfully
* previously.
*/
void genl_unregister_mc_group(struct genl_family *family,
struct genl_multicast_group *grp)
{
BUG_ON(grp->family != family);
genl_lock();
netlink_clear_multicast_users(genl_sock, grp->id);
clear_bit(grp->id, mc_groups);
list_del(&grp->list);
genl_ctrl_event(CTRL_CMD_DELMCAST_GRP, grp);
grp->id = 0;
grp->family = NULL;
genl_unlock();
}
static void genl_unregister_mc_groups(struct genl_family *family)
{
struct genl_multicast_group *grp, *tmp;
list_for_each_entry_safe(grp, tmp, &family->mcast_groups, list)
genl_unregister_mc_group(family, grp);
}
/**
* genl_register_ops - register generic netlink operations
* @family: generic netlink family
@@ -216,6 +336,7 @@ int genl_register_family(struct genl_family *family)
goto errout;
INIT_LIST_HEAD(&family->ops_list);
INIT_LIST_HEAD(&family->mcast_groups);
genl_lock();
@@ -275,6 +396,8 @@ int genl_unregister_family(struct genl_family *family)
{
struct genl_family *rc;
genl_unregister_mc_groups(family);
genl_lock();
list_for_each_entry(rc, genl_family_chain(family->id), family_list) {
@@ -410,6 +533,67 @@ static int ctrl_fill_info(struct genl_family *family, u32 pid, u32 seq,
nla_nest_end(skb, nla_ops);
}
if (!list_empty(&family->mcast_groups)) {
struct genl_multicast_group *grp;
struct nlattr *nla_grps;
int idx = 1;
nla_grps = nla_nest_start(skb, CTRL_ATTR_MCAST_GROUPS);
if (nla_grps == NULL)
goto nla_put_failure;
list_for_each_entry(grp, &family->mcast_groups, list) {
struct nlattr *nest;
nest = nla_nest_start(skb, idx++);
if (nest == NULL)
goto nla_put_failure;
NLA_PUT_U32(skb, CTRL_ATTR_MCAST_GRP_ID, grp->id);
NLA_PUT_STRING(skb, CTRL_ATTR_MCAST_GRP_NAME,
grp->name);
nla_nest_end(skb, nest);
}
nla_nest_end(skb, nla_grps);
}
return genlmsg_end(skb, hdr);
nla_put_failure:
return genlmsg_cancel(skb, hdr);
}
static int ctrl_fill_mcgrp_info(struct genl_multicast_group *grp, u32 pid,
u32 seq, u32 flags, struct sk_buff *skb,
u8 cmd)
{
void *hdr;
struct nlattr *nla_grps;
struct nlattr *nest;
hdr = genlmsg_put(skb, pid, seq, &genl_ctrl, flags, cmd);
if (hdr == NULL)
return -1;
NLA_PUT_STRING(skb, CTRL_ATTR_FAMILY_NAME, grp->family->name);
NLA_PUT_U16(skb, CTRL_ATTR_FAMILY_ID, grp->family->id);
nla_grps = nla_nest_start(skb, CTRL_ATTR_MCAST_GROUPS);
if (nla_grps == NULL)
goto nla_put_failure;
nest = nla_nest_start(skb, 1);
if (nest == NULL)
goto nla_put_failure;
NLA_PUT_U32(skb, CTRL_ATTR_MCAST_GRP_ID, grp->id);
NLA_PUT_STRING(skb, CTRL_ATTR_MCAST_GRP_NAME,
grp->name);
nla_nest_end(skb, nest);
nla_nest_end(skb, nla_grps);
return genlmsg_end(skb, hdr);
nla_put_failure:
@@ -453,8 +637,8 @@ errout:
return skb->len;
}
static struct sk_buff *ctrl_build_msg(struct genl_family *family, u32 pid,
int seq, u8 cmd)
static struct sk_buff *ctrl_build_family_msg(struct genl_family *family,
u32 pid, int seq, u8 cmd)
{
struct sk_buff *skb;
int err;
@@ -472,6 +656,25 @@ static struct sk_buff *ctrl_build_msg(struct genl_family *family, u32 pid,
return skb;
}
static struct sk_buff *ctrl_build_mcgrp_msg(struct genl_multicast_group *grp,
u32 pid, int seq, u8 cmd)
{
struct sk_buff *skb;
int err;
skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (skb == NULL)
return ERR_PTR(-ENOBUFS);
err = ctrl_fill_mcgrp_info(grp, pid, seq, 0, skb, cmd);
if (err < 0) {
nlmsg_free(skb);
return ERR_PTR(err);
}
return skb;
}
static const struct nla_policy ctrl_policy[CTRL_ATTR_MAX+1] = {
[CTRL_ATTR_FAMILY_ID] = { .type = NLA_U16 },
[CTRL_ATTR_FAMILY_NAME] = { .type = NLA_NUL_STRING,
@@ -501,8 +704,8 @@ static int ctrl_getfamily(struct sk_buff *skb, struct genl_info *info)
goto errout;
}
msg = ctrl_build_msg(res, info->snd_pid, info->snd_seq,
CTRL_CMD_NEWFAMILY);
msg = ctrl_build_family_msg(res, info->snd_pid, info->snd_seq,
CTRL_CMD_NEWFAMILY);
if (IS_ERR(msg)) {
err = PTR_ERR(msg);
goto errout;
@@ -523,7 +726,15 @@ static int genl_ctrl_event(int event, void *data)
switch (event) {
case CTRL_CMD_NEWFAMILY:
case CTRL_CMD_DELFAMILY:
msg = ctrl_build_msg(data, 0, 0, event);
msg = ctrl_build_family_msg(data, 0, 0, event);
if (IS_ERR(msg))
return PTR_ERR(msg);
genlmsg_multicast(msg, 0, GENL_ID_CTRL, GFP_KERNEL);
break;
case CTRL_CMD_NEWMCAST_GRP:
case CTRL_CMD_DELMCAST_GRP:
msg = ctrl_build_mcgrp_msg(data, 0, 0, event);
if (IS_ERR(msg))
return PTR_ERR(msg);
@@ -541,6 +752,10 @@ static struct genl_ops genl_ctrl_ops = {
.policy = ctrl_policy,
};
static struct genl_multicast_group notify_grp = {
.name = "notify",
};
static int __init genl_init(void)
{
int i, err;
@@ -557,11 +772,17 @@ static int __init genl_init(void)
goto errout_register;
netlink_set_nonroot(NETLINK_GENERIC, NL_NONROOT_RECV);
genl_sock = netlink_kernel_create(NETLINK_GENERIC, GENL_MAX_ID,
genl_rcv, NULL, THIS_MODULE);
/* we'll bump the group number right afterwards */
genl_sock = netlink_kernel_create(NETLINK_GENERIC, 0, genl_rcv,
NULL, THIS_MODULE);
if (genl_sock == NULL)
panic("GENL: Cannot initialize generic netlink\n");
err = genl_register_mc_group(&genl_ctrl, &notify_grp);
if (err < 0)
goto errout_register;
return 0;
errout_register:

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