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raspberrypi-kernel
提交 f98e8569 编写于 作者: L Linus Torvalds
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Merge master.kernel.org:/pub/scm/linux/kernel/git/acme/net-2.6

上级 ec33b309 97300b5f
隐藏空白更改
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Showing with 415 addition and 219 deletion
include/linux/netfilter_arp/arp_tables.h
浏览文件 @ f98e8569
......@@ -68,7 +68,8 @@ struct arpt_entry_target
u_int16_t target_size;
/* Used by userspace */
char name[ARPT_FUNCTION_MAXNAMELEN];
char name[ARPT_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
} user;
struct {
u_int16_t target_size;
......@@ -148,7 +149,9 @@ struct arpt_entry
#define ARPT_SO_GET_INFO (ARPT_BASE_CTL)
#define ARPT_SO_GET_ENTRIES (ARPT_BASE_CTL + 1)
#define ARPT_SO_GET_MAX ARPT_SO_GET_ENTRIES
/* #define ARPT_SO_GET_REVISION_MATCH (ARPT_BASE_CTL + 2)*/
#define ARPT_SO_GET_REVISION_TARGET (ARPT_BASE_CTL + 3)
#define ARPT_SO_GET_MAX ARPT_SO_GET_REVISION_TARGET
/* CONTINUE verdict for targets */
#define ARPT_CONTINUE 0xFFFFFFFF
......@@ -236,6 +239,15 @@ struct arpt_get_entries
struct arpt_entry entrytable[0];
};
/* The argument to ARPT_SO_GET_REVISION_*. Returns highest revision
* kernel supports, if >= revision. */
struct arpt_get_revision
{
char name[ARPT_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
};
/* Standard return verdict, or do jump. */
#define ARPT_STANDARD_TARGET ""
/* Error verdict. */
......@@ -274,7 +286,9 @@ struct arpt_target
{
struct list_head list;
const char name[ARPT_FUNCTION_MAXNAMELEN];
const char name[ARPT_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
/* Returns verdict. */
unsigned int (*target)(struct sk_buff **pskb,
......
include/linux/netfilter_ipv6/ip6_tables.h
浏览文件 @ f98e8569
......@@ -57,7 +57,8 @@ struct ip6t_entry_match
u_int16_t match_size;
/* Used by userspace */
char name[IP6T_FUNCTION_MAXNAMELEN];
char name[IP6T_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
} user;
struct {
u_int16_t match_size;
......@@ -80,7 +81,8 @@ struct ip6t_entry_target
u_int16_t target_size;
/* Used by userspace */
char name[IP6T_FUNCTION_MAXNAMELEN];
char name[IP6T_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
} user;
struct {
u_int16_t target_size;
......@@ -161,7 +163,9 @@ struct ip6t_entry
#define IP6T_SO_GET_INFO (IP6T_BASE_CTL)
#define IP6T_SO_GET_ENTRIES (IP6T_BASE_CTL + 1)
#define IP6T_SO_GET_MAX IP6T_SO_GET_ENTRIES
#define IP6T_SO_GET_REVISION_MATCH (IP6T_BASE_CTL + 2)
#define IP6T_SO_GET_REVISION_TARGET (IP6T_BASE_CTL + 3)
#define IP6T_SO_GET_MAX IP6T_SO_GET_REVISION_TARGET
/* CONTINUE verdict for targets */
#define IP6T_CONTINUE 0xFFFFFFFF
......@@ -291,6 +295,15 @@ struct ip6t_get_entries
struct ip6t_entry entrytable[0];
};
/* The argument to IP6T_SO_GET_REVISION_*. Returns highest revision
* kernel supports, if >= revision. */
struct ip6t_get_revision
{
char name[IP6T_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
};
/* Standard return verdict, or do jump. */
#define IP6T_STANDARD_TARGET ""
/* Error verdict. */
......@@ -352,7 +365,9 @@ struct ip6t_match
{
struct list_head list;
const char name[IP6T_FUNCTION_MAXNAMELEN];
const char name[IP6T_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
/* Return true or false: return FALSE and set *hotdrop = 1 to
force immediate packet drop. */
......@@ -387,7 +402,9 @@ struct ip6t_target
{
struct list_head list;
const char name[IP6T_FUNCTION_MAXNAMELEN];
const char name[IP6T_FUNCTION_MAXNAMELEN-1];
u_int8_t revision;
/* Returns verdict. Argument order changed since 2.6.9, as this
must now handle non-linear skbs, using skb_copy_bits and
......
net/bridge/br_fdb.c
浏览文件 @ f98e8569
......@@ -86,8 +86,8 @@ void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr)
struct net_bridge_port *op;
list_for_each_entry(op, &br->port_list, list) {
if (op != p &&
!memcmp(op->dev->dev_addr,
f->addr.addr, ETH_ALEN)) {
!compare_ether_addr(op->dev->dev_addr,
f->addr.addr)) {
f->dst = op;
goto insert;
}
......@@ -151,8 +151,8 @@ void br_fdb_delete_by_port(struct net_bridge *br, struct net_bridge_port *p)
struct net_bridge_port *op;
list_for_each_entry(op, &br->port_list, list) {
if (op != p &&
!memcmp(op->dev->dev_addr,
f->addr.addr, ETH_ALEN)) {
!compare_ether_addr(op->dev->dev_addr,
f->addr.addr)) {
f->dst = op;
goto skip_delete;
}
......@@ -174,7 +174,7 @@ struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
struct net_bridge_fdb_entry *fdb;
hlist_for_each_entry_rcu(fdb, h, &br->hash[br_mac_hash(addr)], hlist) {
if (!memcmp(fdb->addr.addr, addr, ETH_ALEN)) {
if (!compare_ether_addr(fdb->addr.addr, addr)) {
if (unlikely(has_expired(br, fdb)))
break;
return fdb;
......@@ -264,7 +264,7 @@ static inline struct net_bridge_fdb_entry *fdb_find(struct hlist_head *head,
struct net_bridge_fdb_entry *fdb;
hlist_for_each_entry_rcu(fdb, h, head, hlist) {
if (!memcmp(fdb->addr.addr, addr, ETH_ALEN))
if (!compare_ether_addr(fdb->addr.addr, addr))
return fdb;
}
return NULL;
......
net/bridge/br_input.c
浏览文件 @ f98e8569
......@@ -128,7 +128,7 @@ int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb)
dest = eth_hdr(skb)->h_dest;
}
if (!memcmp(p->br->dev->dev_addr, dest, ETH_ALEN))
if (!compare_ether_addr(p->br->dev->dev_addr, dest))
skb->pkt_type = PACKET_HOST;
NF_HOOK(PF_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
......
net/bridge/br_stp_if.c
浏览文件 @ f98e8569
......@@ -15,6 +15,7 @@
#include <linux/kernel.h>
#include <linux/smp_lock.h>
#include <linux/etherdevice.h>
#include "br_private.h"
#include "br_private_stp.h"
......@@ -133,10 +134,10 @@ static void br_stp_change_bridge_id(struct net_bridge *br,
memcpy(br->dev->dev_addr, addr, ETH_ALEN);
list_for_each_entry(p, &br->port_list, list) {
if (!memcmp(p->designated_bridge.addr, oldaddr, ETH_ALEN))
if (!compare_ether_addr(p->designated_bridge.addr, oldaddr))
memcpy(p->designated_bridge.addr, addr, ETH_ALEN);
if (!memcmp(p->designated_root.addr, oldaddr, ETH_ALEN))
if (!compare_ether_addr(p->designated_root.addr, oldaddr))
memcpy(p->designated_root.addr, addr, ETH_ALEN);
}
......@@ -157,12 +158,12 @@ void br_stp_recalculate_bridge_id(struct net_bridge *br)
list_for_each_entry(p, &br->port_list, list) {
if (addr == br_mac_zero ||
memcmp(p->dev->dev_addr, addr, ETH_ALEN) < 0)
compare_ether_addr(p->dev->dev_addr, addr) < 0)
addr = p->dev->dev_addr;
}
if (memcmp(br->bridge_id.addr, addr, ETH_ALEN))
if (compare_ether_addr(br->bridge_id.addr, addr))
br_stp_change_bridge_id(br, addr);
}
......
net/dccp/dccp.h
浏览文件 @ f98e8569
......@@ -118,7 +118,6 @@ DECLARE_SNMP_STAT(struct dccp_mib, dccp_statistics);
#define DCCP_ADD_STATS_USER(field, val) \
SNMP_ADD_STATS_USER(dccp_statistics, field, val)
extern int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb);
extern int dccp_retransmit_skb(struct sock *sk, struct sk_buff *skb);
extern int dccp_send_response(struct sock *sk);
......
net/dccp/output.c
浏览文件 @ f98e8569
......@@ -12,6 +12,7 @@
#include <linux/config.h>
#include <linux/dccp.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <net/sock.h>
......@@ -25,13 +26,20 @@ static inline void dccp_event_ack_sent(struct sock *sk)
inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
}
static inline void dccp_skb_entail(struct sock *sk, struct sk_buff *skb)
{
skb_set_owner_w(skb, sk);
WARN_ON(sk->sk_send_head);
sk->sk_send_head = skb;
}
/*
* All SKB's seen here are completely headerless. It is our
* job to build the DCCP header, and pass the packet down to
* IP so it can do the same plus pass the packet off to the
* device.
*/
int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
{
if (likely(skb != NULL)) {
const struct inet_sock *inet = inet_sk(sk);
......@@ -50,10 +58,21 @@ int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
switch (dcb->dccpd_type) {
case DCCP_PKT_DATA:
set_ack = 0;
/* fall through */
case DCCP_PKT_DATAACK:
break;
case DCCP_PKT_SYNC:
case DCCP_PKT_SYNCACK:
ackno = dcb->dccpd_seq;
/* fall through */
default:
/*
* Only data packets should come through with skb->sk
* set.
*/
WARN_ON(skb->sk);
skb_set_owner_w(skb, sk);
break;
}
......@@ -63,9 +82,6 @@ int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
skb->h.raw = skb_push(skb, dccp_header_size);
dh = dccp_hdr(skb);
if (!skb->sk)
skb_set_owner_w(skb, sk);
/* Build DCCP header and checksum it. */
memset(dh, 0, dccp_header_size);
dh->dccph_type = dcb->dccpd_type;
......@@ -393,10 +409,8 @@ int dccp_connect(struct sock *sk)
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_REQUEST;
skb->csum = 0;
skb_set_owner_w(skb, sk);
BUG_TRAP(sk->sk_send_head == NULL);
sk->sk_send_head = skb;
dccp_skb_entail(sk, skb);
dccp_transmit_skb(sk, skb_clone(skb, GFP_KERNEL));
DCCP_INC_STATS(DCCP_MIB_ACTIVEOPENS);
......@@ -425,7 +439,6 @@ void dccp_send_ack(struct sock *sk)
skb_reserve(skb, MAX_DCCP_HEADER);
skb->csum = 0;
DCCP_SKB_CB(skb)->dccpd_type = DCCP_PKT_ACK;
skb_set_owner_w(skb, sk);
dccp_transmit_skb(sk, skb);
}
}
......@@ -482,7 +495,6 @@ void dccp_send_sync(struct sock *sk, const u64 seq,
DCCP_SKB_CB(skb)->dccpd_type = pkt_type;
DCCP_SKB_CB(skb)->dccpd_seq = seq;
skb_set_owner_w(skb, sk);
dccp_transmit_skb(sk, skb);
}
......@@ -507,10 +519,8 @@ void dccp_send_close(struct sock *sk, const int active)
DCCP_SKB_CB(skb)->dccpd_type = dp->dccps_role == DCCP_ROLE_CLIENT ?
DCCP_PKT_CLOSE : DCCP_PKT_CLOSEREQ;
skb_set_owner_w(skb, sk);
if (active) {
BUG_TRAP(sk->sk_send_head == NULL);
sk->sk_send_head = skb;
dccp_skb_entail(sk, skb);
dccp_transmit_skb(sk, skb_clone(skb, prio));
} else
dccp_transmit_skb(sk, skb);
......
net/ipv4/netfilter/arp_tables.c
浏览文件 @ f98e8569
......@@ -347,58 +347,106 @@ unsigned int arpt_do_table(struct sk_buff **pskb,
return verdict;
}
static inline void *find_inlist_lock_noload(struct list_head *head,
const char *name,
int *error,
struct semaphore *mutex)
/*
* These are weird, but module loading must not be done with mutex
* held (since they will register), and we have to have a single
* function to use try_then_request_module().
*/
/* Find table by name, grabs mutex & ref. Returns ERR_PTR() on error. */
static inline struct arpt_table *find_table_lock(const char *name)
{
void *ret;
struct arpt_table *t;
*error = down_interruptible(mutex);
if (*error != 0)
return NULL;
if (down_interruptible(&arpt_mutex) != 0)
return ERR_PTR(-EINTR);
ret = list_named_find(head, name);
if (!ret) {
*error = -ENOENT;
up(mutex);
}
return ret;
list_for_each_entry(t, &arpt_tables, list)
if (strcmp(t->name, name) == 0 && try_module_get(t->me))
return t;
up(&arpt_mutex);
return NULL;
}
#ifndef CONFIG_KMOD
#define find_inlist_lock(h,n,p,e,m) find_inlist_lock_noload((h),(n),(e),(m))
#else
static void *
find_inlist_lock(struct list_head *head,
const char *name,
const char *prefix,
int *error,
struct semaphore *mutex)
/* Find target, grabs ref. Returns ERR_PTR() on error. */
static inline struct arpt_target *find_target(const char *name, u8 revision)
{
void *ret;
struct arpt_target *t;
int err = 0;
ret = find_inlist_lock_noload(head, name, error, mutex);
if (!ret) {
duprintf("find_inlist: loading `%s%s'.\n", prefix, name);
request_module("%s%s", prefix, name);
ret = find_inlist_lock_noload(head, name, error, mutex);
if (down_interruptible(&arpt_mutex) != 0)
return ERR_PTR(-EINTR);
list_for_each_entry(t, &arpt_target, list) {
if (strcmp(t->name, name) == 0) {
if (t->revision == revision) {
if (try_module_get(t->me)) {
up(&arpt_mutex);
return t;
}
} else
err = -EPROTOTYPE; /* Found something. */
}
}
up(&arpt_mutex);
return ERR_PTR(err);
}
return ret;
struct arpt_target *arpt_find_target(const char *name, u8 revision)
{
struct arpt_target *target;
target = try_then_request_module(find_target(name, revision),
"arpt_%s", name);
if (IS_ERR(target) || !target)
return NULL;
return target;
}
#endif
static inline struct arpt_table *arpt_find_table_lock(const char *name, int *error, struct semaphore *mutex)
static int target_revfn(const char *name, u8 revision, int *bestp)
{
return find_inlist_lock(&arpt_tables, name, "arptable_", error, mutex);
struct arpt_target *t;
int have_rev = 0;
list_for_each_entry(t, &arpt_target, list) {
if (strcmp(t->name, name) == 0) {
if (t->revision > *bestp)
*bestp = t->revision;
if (t->revision == revision)
have_rev =1;
}
}
return have_rev;
}
static struct arpt_target *arpt_find_target_lock(const char *name, int *error, struct semaphore *mutex)
/* Returns true or false (if no such extension at all) */
static inline int find_revision(const char *name, u8 revision,
int (*revfn)(const char *, u8, int *),
int *err)
{
return find_inlist_lock(&arpt_target, name, "arpt_", error, mutex);
int have_rev, best = -1;
if (down_interruptible(&arpt_mutex) != 0) {
*err = -EINTR;
return 1;
}
have_rev = revfn(name, revision, &best);
up(&arpt_mutex);
/* Nothing at all? Return 0 to try loading module. */
if (best == -1) {
*err = -ENOENT;
return 0;
}
*err = best;
if (!have_rev)
*err = -EPROTONOSUPPORT;
return 1;
}
/* All zeroes == unconditional rule. */
static inline int unconditional(const struct arpt_arp *arp)
{
......@@ -544,17 +592,15 @@ static inline int check_entry(struct arpt_entry *e, const char *name, unsigned i
}
t = arpt_get_target(e);
target = arpt_find_target_lock(t->u.user.name, &ret, &arpt_mutex);
if (!target) {
target = try_then_request_module(find_target(t->u.user.name,
t->u.user.revision),
"arpt_%s", t->u.user.name);
if (IS_ERR(target) || !target) {
duprintf("check_entry: `%s' not found\n", t->u.user.name);
ret = target ? PTR_ERR(target) : -ENOENT;
goto out;
}
if (!try_module_get((target->me))) {
ret = -ENOENT;
goto out_unlock;
}
t->u.kernel.target = target;
up(&arpt_mutex);
if (t->u.kernel.target == &arpt_standard_target) {
if (!standard_check(t, size)) {
......@@ -576,8 +622,6 @@ static inline int check_entry(struct arpt_entry *e, const char *name, unsigned i
(*i)++;
return 0;
out_unlock:
up(&arpt_mutex);
out:
return ret;
}
......@@ -846,8 +890,8 @@ static int get_entries(const struct arpt_get_entries *entries,
int ret;
struct arpt_table *t;
t = arpt_find_table_lock(entries->name, &ret, &arpt_mutex);
if (t) {
t = find_table_lock(entries->name);
if (t || !IS_ERR(t)) {
duprintf("t->private->number = %u\n",
t->private->number);
if (entries->size == t->private->size)
......@@ -859,10 +903,10 @@ static int get_entries(const struct arpt_get_entries *entries,
entries->size);
ret = -EINVAL;
}
module_put(t->me);
up(&arpt_mutex);
} else
duprintf("get_entries: Can't find %s!\n",
entries->name);
ret = t ? PTR_ERR(t) : -ENOENT;
return ret;
}
......@@ -913,22 +957,19 @@ static int do_replace(void __user *user, unsigned int len)
duprintf("arp_tables: Translated table\n");
t = arpt_find_table_lock(tmp.name, &ret, &arpt_mutex);
if (!t)
t = try_then_request_module(find_table_lock(tmp.name),
"arptable_%s", tmp.name);
if (!t || IS_ERR(t)) {
ret = t ? PTR_ERR(t) : -ENOENT;
goto free_newinfo_counters_untrans;
}
/* You lied! */
if (tmp.valid_hooks != t->valid_hooks) {
duprintf("Valid hook crap: %08X vs %08X\n",
tmp.valid_hooks, t->valid_hooks);
ret = -EINVAL;
goto free_newinfo_counters_untrans_unlock;
}
/* Get a reference in advance, we're not allowed fail later */
if (!try_module_get(t->me)) {
ret = -EBUSY;
goto free_newinfo_counters_untrans_unlock;
goto put_module;
}
oldinfo = replace_table(t, tmp.num_counters, newinfo, &ret);
......@@ -959,7 +1000,6 @@ static int do_replace(void __user *user, unsigned int len)
put_module:
module_put(t->me);
free_newinfo_counters_untrans_unlock:
up(&arpt_mutex);
free_newinfo_counters_untrans:
ARPT_ENTRY_ITERATE(newinfo->entries, newinfo->size, cleanup_entry, NULL);
......@@ -989,7 +1029,7 @@ static int do_add_counters(void __user *user, unsigned int len)
unsigned int i;
struct arpt_counters_info tmp, *paddc;
struct arpt_table *t;
int ret;
int ret = 0;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
......@@ -1006,9 +1046,11 @@ static int do_add_counters(void __user *user, unsigned int len)
goto free;
}
t = arpt_find_table_lock(tmp.name, &ret, &arpt_mutex);
if (!t)
t = find_table_lock(tmp.name);
if (!t || IS_ERR(t)) {
ret = t ? PTR_ERR(t) : -ENOENT;
goto free;
}
write_lock_bh(&t->lock);
if (t->private->number != paddc->num_counters) {
......@@ -1025,6 +1067,7 @@ static int do_add_counters(void __user *user, unsigned int len)
unlock_up_free:
write_unlock_bh(&t->lock);
up(&arpt_mutex);
module_put(t->me);
free:
vfree(paddc);
......@@ -1079,8 +1122,10 @@ static int do_arpt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len
break;
}
name[ARPT_TABLE_MAXNAMELEN-1] = '\0';
t = arpt_find_table_lock(name, &ret, &arpt_mutex);
if (t) {
t = try_then_request_module(find_table_lock(name),
"arptable_%s", name);
if (t && !IS_ERR(t)) {
struct arpt_getinfo info;
info.valid_hooks = t->valid_hooks;
......@@ -1096,9 +1141,10 @@ static int do_arpt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len
ret = -EFAULT;
else
ret = 0;
up(&arpt_mutex);
}
module_put(t->me);
} else
ret = t ? PTR_ERR(t) : -ENOENT;
}
break;
......@@ -1119,6 +1165,24 @@ static int do_arpt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len
break;
}
case ARPT_SO_GET_REVISION_TARGET: {
struct arpt_get_revision rev;
if (*len != sizeof(rev)) {
ret = -EINVAL;
break;
}
if (copy_from_user(&rev, user, sizeof(rev)) != 0) {
ret = -EFAULT;
break;
}
try_then_request_module(find_revision(rev.name, rev.revision,
target_revfn, &ret),
"arpt_%s", rev.name);
break;
}
default:
duprintf("do_arpt_get_ctl: unknown request %i\n", cmd);
ret = -EINVAL;
......@@ -1136,12 +1200,9 @@ int arpt_register_target(struct arpt_target *target)
if (ret != 0)
return ret;
if (!list_named_insert(&arpt_target, target)) {
duprintf("arpt_register_target: `%s' already in list!\n",
target->name);
ret = -EINVAL;
}
list_add(&target->list, &arpt_target);
up(&arpt_mutex);
return ret;
}
......
net/ipv6/mcast.c
浏览文件 @ f98e8569
......@@ -1087,7 +1087,7 @@ static void mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
int igmp6_event_query(struct sk_buff *skb)
{
struct mld2_query *mlh2 = (struct mld2_query *) skb->h.raw;
struct mld2_query *mlh2 = NULL;
struct ifmcaddr6 *ma;
struct in6_addr *group;
unsigned long max_delay;
......@@ -1140,6 +1140,13 @@ int igmp6_event_query(struct sk_buff *skb)
/* clear deleted report items */
mld_clear_delrec(idev);
} else if (len >= 28) {
int srcs_offset = sizeof(struct mld2_query) -
sizeof(struct icmp6hdr);
if (!pskb_may_pull(skb, srcs_offset)) {
in6_dev_put(idev);
return -EINVAL;
}
mlh2 = (struct mld2_query *) skb->h.raw;
max_delay = (MLDV2_MRC(ntohs(mlh2->mrc))*HZ)/1000;
if (!max_delay)
max_delay = 1;
......@@ -1156,7 +1163,15 @@ int igmp6_event_query(struct sk_buff *skb)
return 0;
}
/* mark sources to include, if group & source-specific */
mark = mlh2->nsrcs != 0;
if (mlh2->nsrcs != 0) {
if (!pskb_may_pull(skb, srcs_offset +
mlh2->nsrcs * sizeof(struct in6_addr))) {
in6_dev_put(idev);
return -EINVAL;
}
mlh2 = (struct mld2_query *) skb->h.raw;
mark = 1;
}
} else {
in6_dev_put(idev);
return -EINVAL;
......
net/ipv6/netfilter/ip6_tables.c
浏览文件 @ f98e8569
......@@ -2,7 +2,7 @@
* Packet matching code.
*
* Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling
* Copyright (C) 2000-2002 Netfilter core team <coreteam@netfilter.org>
* Copyright (C) 2000-2005 Netfilter Core Team <coreteam@netfilter.org>
*
* 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
......@@ -23,7 +23,6 @@
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/icmpv6.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <asm/uaccess.h>
#include <asm/semaphore.h>
......@@ -80,13 +79,12 @@ static DECLARE_MUTEX(ip6t_mutex);
#define inline
#endif
/* Locking is simple: we assume at worst case there will be one packet
in user context and one from bottom halves (or soft irq if Alexey's
softnet patch was applied).
/*
We keep a set of rules for each CPU, so we can avoid write-locking
them; doing a readlock_bh() stops packets coming through if we're
in user context.
them in the softirq when updating the counters and therefore
only need to read-lock in the softirq; doing a write_lock_bh() in user
context stops packets coming through and allows user context to read
the counters or update the rules.
To be cache friendly on SMP, we arrange them like so:
[ n-entries ]
......@@ -356,7 +354,7 @@ ip6t_do_table(struct sk_buff **pskb,
struct ip6t_table *table,
void *userdata)
{
static const char nulldevname[IFNAMSIZ];
static const char nulldevname[IFNAMSIZ] __attribute__((aligned(sizeof(long))));
int offset = 0;
unsigned int protoff = 0;
int hotdrop = 0;
......@@ -369,7 +367,6 @@ ip6t_do_table(struct sk_buff **pskb,
/* Initialization */
indev = in ? in->name : nulldevname;
outdev = out ? out->name : nulldevname;
/* We handle fragments by dealing with the first fragment as
* if it was a normal packet. All other fragments are treated
* normally, except that they will NEVER match rules that ask
......@@ -497,75 +494,145 @@ ip6t_do_table(struct sk_buff **pskb,
#endif
}
/* If it succeeds, returns element and locks mutex */
static inline void *
find_inlist_lock_noload(struct list_head *head,
const char *name,
int *error,
struct semaphore *mutex)
/*
* These are weird, but module loading must not be done with mutex
* held (since they will register), and we have to have a single
* function to use try_then_request_module().
*/
/* Find table by name, grabs mutex & ref. Returns ERR_PTR() on error. */
static inline struct ip6t_table *find_table_lock(const char *name)
{
void *ret;
struct ip6t_table *t;
#if 1
duprintf("find_inlist: searching for `%s' in %s.\n",
name, head == &ip6t_target ? "ip6t_target"
: head == &ip6t_match ? "ip6t_match"
: head == &ip6t_tables ? "ip6t_tables" : "UNKNOWN");
#endif
if (down_interruptible(&ip6t_mutex) != 0)
return ERR_PTR(-EINTR);
*error = down_interruptible(mutex);
if (*error != 0)
return NULL;
list_for_each_entry(t, &ip6t_tables, list)
if (strcmp(t->name, name) == 0 && try_module_get(t->me))
return t;
up(&ip6t_mutex);
return NULL;
}
/* Find match, grabs ref. Returns ERR_PTR() on error. */
static inline struct ip6t_match *find_match(const char *name, u8 revision)
{
struct ip6t_match *m;
int err = 0;
ret = list_named_find(head, name);
if (!ret) {
*error = -ENOENT;
up(mutex);
if (down_interruptible(&ip6t_mutex) != 0)
return ERR_PTR(-EINTR);
list_for_each_entry(m, &ip6t_match, list) {
if (strcmp(m->name, name) == 0) {
if (m->revision == revision) {
if (try_module_get(m->me)) {
up(&ip6t_mutex);
return m;
}
} else
err = -EPROTOTYPE; /* Found something. */
}
}
return ret;
up(&ip6t_mutex);
return ERR_PTR(err);
}
#ifndef CONFIG_KMOD
#define find_inlist_lock(h,n,p,e,m) find_inlist_lock_noload((h),(n),(e),(m))
#else
static void *
find_inlist_lock(struct list_head *head,
const char *name,
const char *prefix,
int *error,
struct semaphore *mutex)
/* Find target, grabs ref. Returns ERR_PTR() on error. */
static inline struct ip6t_target *find_target(const char *name, u8 revision)
{
void *ret;
struct ip6t_target *t;
int err = 0;
ret = find_inlist_lock_noload(head, name, error, mutex);
if (!ret) {
duprintf("find_inlist: loading `%s%s'.\n", prefix, name);
request_module("%s%s", prefix, name);
ret = find_inlist_lock_noload(head, name, error, mutex);
if (down_interruptible(&ip6t_mutex) != 0)
return ERR_PTR(-EINTR);
list_for_each_entry(t, &ip6t_target, list) {
if (strcmp(t->name, name) == 0) {
if (t->revision == revision) {
if (try_module_get(t->me)) {
up(&ip6t_mutex);
return t;
}
} else
err = -EPROTOTYPE; /* Found something. */
}
}
up(&ip6t_mutex);
return ERR_PTR(err);
}
return ret;
struct ip6t_target *ip6t_find_target(const char *name, u8 revision)
{
struct ip6t_target *target;
target = try_then_request_module(find_target(name, revision),
"ip6t_%s", name);
if (IS_ERR(target) || !target)
return NULL;
return target;
}
#endif
static inline struct ip6t_table *
ip6t_find_table_lock(const char *name, int *error, struct semaphore *mutex)
static int match_revfn(const char *name, u8 revision, int *bestp)
{
return find_inlist_lock(&ip6t_tables, name, "ip6table_", error, mutex);
struct ip6t_match *m;
int have_rev = 0;
list_for_each_entry(m, &ip6t_match, list) {
if (strcmp(m->name, name) == 0) {
if (m->revision > *bestp)
*bestp = m->revision;
if (m->revision == revision)
have_rev = 1;
}
}
return have_rev;
}
static inline struct ip6t_match *
find_match_lock(const char *name, int *error, struct semaphore *mutex)
static int target_revfn(const char *name, u8 revision, int *bestp)
{
return find_inlist_lock(&ip6t_match, name, "ip6t_", error, mutex);
struct ip6t_target *t;
int have_rev = 0;
list_for_each_entry(t, &ip6t_target, list) {
if (strcmp(t->name, name) == 0) {
if (t->revision > *bestp)
*bestp = t->revision;
if (t->revision == revision)
have_rev = 1;
}
}
return have_rev;
}
static struct ip6t_target *
ip6t_find_target_lock(const char *name, int *error, struct semaphore *mutex)
/* Returns true or fals (if no such extension at all) */
static inline int find_revision(const char *name, u8 revision,
int (*revfn)(const char *, u8, int *),
int *err)
{
return find_inlist_lock(&ip6t_target, name, "ip6t_", error, mutex);
int have_rev, best = -1;
if (down_interruptible(&ip6t_mutex) != 0) {
*err = -EINTR;
return 1;
}
have_rev = revfn(name, revision, &best);
up(&ip6t_mutex);
/* Nothing at all? Return 0 to try loading module. */
if (best == -1) {
*err = -ENOENT;
return 0;
}
*err = best;
if (!have_rev)
*err = -EPROTONOSUPPORT;
return 1;
}
/* All zeroes == unconditional rule. */
static inline int
unconditional(const struct ip6t_ip6 *ipv6)
......@@ -725,20 +792,16 @@ check_match(struct ip6t_entry_match *m,
unsigned int hookmask,
unsigned int *i)
{
int ret;
struct ip6t_match *match;
match = find_match_lock(m->u.user.name, &ret, &ip6t_mutex);
if (!match) {
// duprintf("check_match: `%s' not found\n", m->u.name);
return ret;
}
if (!try_module_get(match->me)) {
up(&ip6t_mutex);
return -ENOENT;
match = try_then_request_module(find_match(m->u.user.name,
m->u.user.revision),
"ip6t_%s", m->u.user.name);
if (IS_ERR(match) || !match) {
duprintf("check_match: `%s' not found\n", m->u.user.name);
return match ? PTR_ERR(match) : -ENOENT;
}
m->u.kernel.match = match;
up(&ip6t_mutex);
if (m->u.kernel.match->checkentry
&& !m->u.kernel.match->checkentry(name, ipv6, m->data,
......@@ -776,22 +839,16 @@ check_entry(struct ip6t_entry *e, const char *name, unsigned int size,
goto cleanup_matches;
t = ip6t_get_target(e);
target = ip6t_find_target_lock(t->u.user.name, &ret, &ip6t_mutex);
if (!target) {
target = try_then_request_module(find_target(t->u.user.name,
t->u.user.revision),
"ip6t_%s", t->u.user.name);
if (IS_ERR(target) || !target) {
duprintf("check_entry: `%s' not found\n", t->u.user.name);
goto cleanup_matches;
}
if (!try_module_get(target->me)) {
up(&ip6t_mutex);
ret = -ENOENT;
ret = target ? PTR_ERR(target) : -ENOENT;
goto cleanup_matches;
}
t->u.kernel.target = target;
up(&ip6t_mutex);
if (!t->u.kernel.target) {
ret = -EBUSY;
goto cleanup_matches;
}
if (t->u.kernel.target == &ip6t_standard_target) {
if (!standard_check(t, size)) {
ret = -EINVAL;
......@@ -1118,8 +1175,8 @@ get_entries(const struct ip6t_get_entries *entries,
int ret;
struct ip6t_table *t;
t = ip6t_find_table_lock(entries->name, &ret, &ip6t_mutex);
if (t) {
t = find_table_lock(entries->name);
if (t && !IS_ERR(t)) {
duprintf("t->private->number = %u\n",
t->private->number);
if (entries->size == t->private->size)
......@@ -1131,10 +1188,10 @@ get_entries(const struct ip6t_get_entries *entries,
entries->size);
ret = -EINVAL;
}
module_put(t->me);
up(&ip6t_mutex);
} else
duprintf("get_entries: Can't find %s!\n",
entries->name);
ret = t ? PTR_ERR(t) : -ENOENT;
return ret;
}
......@@ -1182,22 +1239,19 @@ do_replace(void __user *user, unsigned int len)
duprintf("ip_tables: Translated table\n");
t = ip6t_find_table_lock(tmp.name, &ret, &ip6t_mutex);
if (!t)
t = try_then_request_module(find_table_lock(tmp.name),
"ip6table_%s", tmp.name);
if (!t || IS_ERR(t)) {
ret = t ? PTR_ERR(t) : -ENOENT;
goto free_newinfo_counters_untrans;
}
/* You lied! */
if (tmp.valid_hooks != t->valid_hooks) {
duprintf("Valid hook crap: %08X vs %08X\n",
tmp.valid_hooks, t->valid_hooks);
ret = -EINVAL;
goto free_newinfo_counters_untrans_unlock;
}
/* Get a reference in advance, we're not allowed fail later */
if (!try_module_get(t->me)) {
ret = -EBUSY;
goto free_newinfo_counters_untrans_unlock;
goto put_module;
}
oldinfo = replace_table(t, tmp.num_counters, newinfo, &ret);
......@@ -1219,7 +1273,6 @@ do_replace(void __user *user, unsigned int len)
/* Decrease module usage counts and free resource */
IP6T_ENTRY_ITERATE(oldinfo->entries, oldinfo->size, cleanup_entry,NULL);
vfree(oldinfo);
/* Silent error: too late now. */
if (copy_to_user(tmp.counters, counters,
sizeof(struct ip6t_counters) * tmp.num_counters) != 0)
ret = -EFAULT;
......@@ -1229,7 +1282,6 @@ do_replace(void __user *user, unsigned int len)
put_module:
module_put(t->me);
free_newinfo_counters_untrans_unlock:
up(&ip6t_mutex);
free_newinfo_counters_untrans:
IP6T_ENTRY_ITERATE(newinfo->entries, newinfo->size, cleanup_entry,NULL);
......@@ -1268,7 +1320,7 @@ do_add_counters(void __user *user, unsigned int len)
unsigned int i;
struct ip6t_counters_info tmp, *paddc;
struct ip6t_table *t;
int ret;
int ret = 0;
if (copy_from_user(&tmp, user, sizeof(tmp)) != 0)
return -EFAULT;
......@@ -1285,9 +1337,11 @@ do_add_counters(void __user *user, unsigned int len)
goto free;
}
t = ip6t_find_table_lock(tmp.name, &ret, &ip6t_mutex);
if (!t)
t = find_table_lock(tmp.name);
if (!t || IS_ERR(t)) {
ret = t ? PTR_ERR(t) : -ENOENT;
goto free;
}
write_lock_bh(&t->lock);
if (t->private->number != paddc->num_counters) {
......@@ -1304,6 +1358,7 @@ do_add_counters(void __user *user, unsigned int len)
unlock_up_free:
write_unlock_bh(&t->lock);
up(&ip6t_mutex);
module_put(t->me);
free:
vfree(paddc);
......@@ -1360,8 +1415,10 @@ do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
break;
}
name[IP6T_TABLE_MAXNAMELEN-1] = '\0';
t = ip6t_find_table_lock(name, &ret, &ip6t_mutex);
if (t) {
t = try_then_request_module(find_table_lock(name),
"ip6table_%s", name);
if (t && !IS_ERR(t)) {
struct ip6t_getinfo info;
info.valid_hooks = t->valid_hooks;
......@@ -1377,9 +1434,10 @@ do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
ret = -EFAULT;
else
ret = 0;
up(&ip6t_mutex);
}
module_put(t->me);
} else
ret = t ? PTR_ERR(t) : -ENOENT;
}
break;
......@@ -1400,6 +1458,31 @@ do_ip6t_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
break;
}
case IP6T_SO_GET_REVISION_MATCH:
case IP6T_SO_GET_REVISION_TARGET: {
struct ip6t_get_revision rev;
int (*revfn)(const char *, u8, int *);
if (*len != sizeof(rev)) {
ret = -EINVAL;
break;
}
if (copy_from_user(&rev, user, sizeof(rev)) != 0) {
ret = -EFAULT;
break;
}
if (cmd == IP6T_SO_GET_REVISION_TARGET)
revfn = target_revfn;
else
revfn = match_revfn;
try_then_request_module(find_revision(rev.name, rev.revision,
revfn, &ret),
"ip6t_%s", rev.name);
break;
}
default:
duprintf("do_ip6t_get_ctl: unknown request %i\n", cmd);
ret = -EINVAL;
......@@ -1417,12 +1500,7 @@ ip6t_register_target(struct ip6t_target *target)
ret = down_interruptible(&ip6t_mutex);
if (ret != 0)
return ret;
if (!list_named_insert(&ip6t_target, target)) {
duprintf("ip6t_register_target: `%s' already in list!\n",
target->name);
ret = -EINVAL;
}
list_add(&target->list, &ip6t_target);
up(&ip6t_mutex);
return ret;
}
......@@ -1444,11 +1522,7 @@ ip6t_register_match(struct ip6t_match *match)
if (ret != 0)
return ret;
if (!list_named_insert(&ip6t_match, match)) {
duprintf("ip6t_register_match: `%s' already in list!\n",
match->name);
ret = -EINVAL;
}
list_add(&match->list, &ip6t_match);
up(&ip6t_mutex);
return ret;
......
net/ipv6/netfilter/ip6t_MARK.c
浏览文件 @ f98e8569
......@@ -56,8 +56,12 @@ checkentry(const char *tablename,
return 1;
}
static struct ip6t_target ip6t_mark_reg
= { { NULL, NULL }, "MARK", target, checkentry, NULL, THIS_MODULE };
static struct ip6t_target ip6t_mark_reg = {
.name = "MARK",
.target = target,
.checkentry = checkentry,
.me = THIS_MODULE
};
static int __init init(void)
{
......
net/ipv6/route.c
浏览文件 @ f98e8569
......@@ -483,7 +483,7 @@ void ip6_route_input(struct sk_buff *skb)
goto out;
}
rt = rt6_device_match(rt, skb->dev->ifindex, 0);
rt = rt6_device_match(rt, skb->dev->ifindex, strict);
BACKTRACK();
if (!rt->rt6i_nexthop && !(rt->rt6i_flags & RTF_NONEXTHOP)) {
......
net/rose/rose_timer.c
浏览文件 @ f98e8569
......@@ -138,6 +138,7 @@ static void rose_heartbeat_expiry(unsigned long param)
is accepted() it isn't 'dead' so doesn't get removed. */
if (sock_flag(sk, SOCK_DESTROY) ||
(sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) {
bh_unlock_sock(sk);
rose_destroy_socket(sk);
return;
}
......
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