diff options
| -rw-r--r-- | include/linux/netfilter/x_tables.h | 17 | ||||
| -rw-r--r-- | include/linux/netfilter_arp/arp_tables.h | 10 | ||||
| -rw-r--r-- | include/linux/netfilter_ipv4/ip_tables.h | 15 | ||||
| -rw-r--r-- | include/linux/netfilter_ipv6/ip6_tables.h | 14 | ||||
| -rw-r--r-- | net/ipv4/netfilter/arp_tables.c | 301 | ||||
| -rw-r--r-- | net/ipv4/netfilter/ip_tables.c | 436 | ||||
| -rw-r--r-- | net/ipv6/netfilter/ip6_tables.c | 436 | ||||
| -rw-r--r-- | net/ipv6/netfilter/nf_conntrack_reasm.c | 8 | ||||
| -rw-r--r-- | net/netfilter/xt_TCPMSS.c | 12 | ||||
| -rw-r--r-- | net/netfilter/xt_recent.c | 4 |
10 files changed, 597 insertions, 656 deletions
diff --git a/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h index a18119fb88f..84c7c928e9e 100644 --- a/include/linux/netfilter/x_tables.h +++ b/include/linux/netfilter/x_tables.h @@ -120,6 +120,7 @@ struct xt_counters_info { #define XT_INV_PROTO 0x40 /* Invert the sense of PROTO. */ +#ifndef __KERNEL__ /* fn returns 0 to continue iteration */ #define XT_MATCH_ITERATE(type, e, fn, args...) \ ({ \ @@ -163,6 +164,22 @@ struct xt_counters_info { #define XT_ENTRY_ITERATE(type, entries, size, fn, args...) \ XT_ENTRY_ITERATE_CONTINUE(type, entries, size, 0, fn, args) +#endif /* !__KERNEL__ */ + +/* pos is normally a struct ipt_entry/ip6t_entry/etc. */ +#define xt_entry_foreach(pos, ehead, esize) \ + for ((pos) = (typeof(pos))(ehead); \ + (pos) < (typeof(pos))((char *)(ehead) + (esize)); \ + (pos) = (typeof(pos))((char *)(pos) + (pos)->next_offset)) + +/* can only be xt_entry_match, so no use of typeof here */ +#define xt_ematch_foreach(pos, entry) \ + for ((pos) = (struct xt_entry_match *)entry->elems; \ + (pos) < (struct xt_entry_match *)((char *)(entry) + \ + (entry)->target_offset); \ + (pos) = (struct xt_entry_match *)((char *)(pos) + \ + (pos)->u.match_size)) + #ifdef __KERNEL__ #include <linux/netdevice.h> diff --git a/include/linux/netfilter_arp/arp_tables.h b/include/linux/netfilter_arp/arp_tables.h index 0b33980611b..e9948c0560f 100644 --- a/include/linux/netfilter_arp/arp_tables.h +++ b/include/linux/netfilter_arp/arp_tables.h @@ -211,9 +211,11 @@ static __inline__ struct arpt_entry_target *arpt_get_target(struct arpt_entry *e return (void *)e + e->target_offset; } +#ifndef __KERNEL__ /* fn returns 0 to continue iteration */ #define ARPT_ENTRY_ITERATE(entries, size, fn, args...) \ XT_ENTRY_ITERATE(struct arpt_entry, entries, size, fn, ## args) +#endif /* * Main firewall chains definitions and global var's definitions. @@ -291,14 +293,6 @@ compat_arpt_get_target(struct compat_arpt_entry *e) #define COMPAT_ARPT_ALIGN(s) COMPAT_XT_ALIGN(s) -/* fn returns 0 to continue iteration */ -#define COMPAT_ARPT_ENTRY_ITERATE(entries, size, fn, args...) \ - XT_ENTRY_ITERATE(struct compat_arpt_entry, entries, size, fn, ## args) - -#define COMPAT_ARPT_ENTRY_ITERATE_CONTINUE(entries, size, n, fn, args...) \ - XT_ENTRY_ITERATE_CONTINUE(struct compat_arpt_entry, entries, size, n, \ - fn, ## args) - #endif /* CONFIG_COMPAT */ #endif /*__KERNEL__*/ #endif /* _ARPTABLES_H */ diff --git a/include/linux/netfilter_ipv4/ip_tables.h b/include/linux/netfilter_ipv4/ip_tables.h index 364973b4213..704a7b6e816 100644 --- a/include/linux/netfilter_ipv4/ip_tables.h +++ b/include/linux/netfilter_ipv4/ip_tables.h @@ -223,6 +223,7 @@ ipt_get_target(struct ipt_entry *e) return (void *)e + e->target_offset; } +#ifndef __KERNEL__ /* fn returns 0 to continue iteration */ #define IPT_MATCH_ITERATE(e, fn, args...) \ XT_MATCH_ITERATE(struct ipt_entry, e, fn, ## args) @@ -230,6 +231,7 @@ ipt_get_target(struct ipt_entry *e) /* fn returns 0 to continue iteration */ #define IPT_ENTRY_ITERATE(entries, size, fn, args...) \ XT_ENTRY_ITERATE(struct ipt_entry, entries, size, fn, ## args) +#endif /* * Main firewall chains definitions and global var's definitions. @@ -313,19 +315,6 @@ compat_ipt_get_target(struct compat_ipt_entry *e) #define COMPAT_IPT_ALIGN(s) COMPAT_XT_ALIGN(s) -/* fn returns 0 to continue iteration */ -#define COMPAT_IPT_MATCH_ITERATE(e, fn, args...) \ - XT_MATCH_ITERATE(struct compat_ipt_entry, e, fn, ## args) - -/* fn returns 0 to continue iteration */ -#define COMPAT_IPT_ENTRY_ITERATE(entries, size, fn, args...) \ - XT_ENTRY_ITERATE(struct compat_ipt_entry, entries, size, fn, ## args) - -/* fn returns 0 to continue iteration */ -#define COMPAT_IPT_ENTRY_ITERATE_CONTINUE(entries, size, n, fn, args...) \ - XT_ENTRY_ITERATE_CONTINUE(struct compat_ipt_entry, entries, size, n, \ - fn, ## args) - #endif /* CONFIG_COMPAT */ #endif /*__KERNEL__*/ #endif /* _IPTABLES_H */ diff --git a/include/linux/netfilter_ipv6/ip6_tables.h b/include/linux/netfilter_ipv6/ip6_tables.h index 8031eb486a1..e5ba03d783c 100644 --- a/include/linux/netfilter_ipv6/ip6_tables.h +++ b/include/linux/netfilter_ipv6/ip6_tables.h @@ -280,6 +280,7 @@ ip6t_get_target(struct ip6t_entry *e) return (void *)e + e->target_offset; } +#ifndef __KERNEL__ /* fn returns 0 to continue iteration */ #define IP6T_MATCH_ITERATE(e, fn, args...) \ XT_MATCH_ITERATE(struct ip6t_entry, e, fn, ## args) @@ -287,6 +288,7 @@ ip6t_get_target(struct ip6t_entry *e) /* fn returns 0 to continue iteration */ #define IP6T_ENTRY_ITERATE(entries, size, fn, args...) \ XT_ENTRY_ITERATE(struct ip6t_entry, entries, size, fn, ## args) +#endif /* * Main firewall chains definitions and global var's definitions. @@ -341,18 +343,6 @@ compat_ip6t_get_target(struct compat_ip6t_entry *e) #define COMPAT_IP6T_ALIGN(s) COMPAT_XT_ALIGN(s) -/* fn returns 0 to continue iteration */ -#define COMPAT_IP6T_MATCH_ITERATE(e, fn, args...) \ - XT_MATCH_ITERATE(struct compat_ip6t_entry, e, fn, ## args) - -/* fn returns 0 to continue iteration */ -#define COMPAT_IP6T_ENTRY_ITERATE(entries, size, fn, args...) \ - XT_ENTRY_ITERATE(struct compat_ip6t_entry, entries, size, fn, ## args) - -#define COMPAT_IP6T_ENTRY_ITERATE_CONTINUE(entries, size, n, fn, args...) \ - XT_ENTRY_ITERATE_CONTINUE(struct compat_ip6t_entry, entries, size, n, \ - fn, ## args) - #endif /* CONFIG_COMPAT */ #endif /*__KERNEL__*/ #endif /* _IP6_TABLES_H */ diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c index 4db5c1ece0f..57098dcda29 100644 --- a/net/ipv4/netfilter/arp_tables.c +++ b/net/ipv4/netfilter/arp_tables.c @@ -512,8 +512,7 @@ static inline int check_target(struct arpt_entry *e, const char *name) } static inline int -find_check_entry(struct arpt_entry *e, const char *name, unsigned int size, - unsigned int *i) +find_check_entry(struct arpt_entry *e, const char *name, unsigned int size) { struct arpt_entry_target *t; struct xt_target *target; @@ -538,8 +537,6 @@ find_check_entry(struct arpt_entry *e, const char *name, unsigned int size, ret = check_target(e, name); if (ret) goto err; - - (*i)++; return 0; err: module_put(t->u.kernel.target->me); @@ -568,8 +565,7 @@ static inline int check_entry_size_and_hooks(struct arpt_entry *e, const unsigned char *limit, const unsigned int *hook_entries, const unsigned int *underflows, - unsigned int valid_hooks, - unsigned int *i) + unsigned int valid_hooks) { unsigned int h; @@ -606,19 +602,14 @@ static inline int check_entry_size_and_hooks(struct arpt_entry *e, /* Clear counters and comefrom */ e->counters = ((struct xt_counters) { 0, 0 }); e->comefrom = 0; - - (*i)++; return 0; } -static inline int cleanup_entry(struct arpt_entry *e, unsigned int *i) +static inline void cleanup_entry(struct arpt_entry *e) { struct xt_tgdtor_param par; struct arpt_entry_target *t; - if (i && (*i)-- == 0) - return 1; - t = arpt_get_target(e); par.target = t->u.kernel.target; par.targinfo = t->data; @@ -626,26 +617,20 @@ static inline int cleanup_entry(struct arpt_entry *e, unsigned int *i) if (par.target->destroy != NULL) par.target->destroy(&par); module_put(par.target->me); - return 0; } /* Checks and translates the user-supplied table segment (held in * newinfo). */ -static int translate_table(const char *name, - unsigned int valid_hooks, - struct xt_table_info *newinfo, - void *entry0, - unsigned int size, - unsigned int number, - const unsigned int *hook_entries, - const unsigned int *underflows) +static int translate_table(struct xt_table_info *newinfo, void *entry0, + const struct arpt_replace *repl) { + struct arpt_entry *iter; unsigned int i; - int ret; + int ret = 0; - newinfo->size = size; - newinfo->number = number; + newinfo->size = repl->size; + newinfo->number = repl->num_entries; /* Init all hooks to impossible value. */ for (i = 0; i < NF_ARP_NUMHOOKS; i++) { @@ -657,52 +642,61 @@ static int translate_table(const char *name, i = 0; /* Walk through entries, checking offsets. */ - ret = ARPT_ENTRY_ITERATE(entry0, newinfo->size, - check_entry_size_and_hooks, - newinfo, - entry0, - entry0 + size, - hook_entries, underflows, valid_hooks, &i); + xt_entry_foreach(iter, entry0, newinfo->size) { + ret = check_entry_size_and_hooks(iter, newinfo, entry0, + entry0 + repl->size, repl->hook_entry, repl->underflow, + repl->valid_hooks); + if (ret != 0) + break; + ++i; + } duprintf("translate_table: ARPT_ENTRY_ITERATE gives %d\n", ret); if (ret != 0) return ret; - if (i != number) { + if (i != repl->num_entries) { duprintf("translate_table: %u not %u entries\n", - i, number); + i, repl->num_entries); return -EINVAL; } /* Check hooks all assigned */ for (i = 0; i < NF_ARP_NUMHOOKS; i++) { /* Only hooks which are valid */ - if (!(valid_hooks & (1 << i))) + if (!(repl->valid_hooks & (1 << i))) continue; if (newinfo->hook_entry[i] == 0xFFFFFFFF) { duprintf("Invalid hook entry %u %u\n", - i, hook_entries[i]); + i, repl->hook_entry[i]); return -EINVAL; } if (newinfo->underflow[i] == 0xFFFFFFFF) { duprintf("Invalid underflow %u %u\n", - i, underflows[i]); + i, repl->underflow[i]); return -EINVAL; } } - if (!mark_source_chains(newinfo, valid_hooks, entry0)) { + if (!mark_source_chains(newinfo, repl->valid_hooks, entry0)) { duprintf("Looping hook\n"); return -ELOOP; } /* Finally, each sanity check must pass */ i = 0; - ret = ARPT_ENTRY_ITERATE(entry0, newinfo->size, - find_check_entry, name, size, &i); + xt_entry_foreach(iter, entry0, newinfo->size) { + ret = find_check_entry(iter, repl->name, repl->size); + if (ret != 0) + break; + ++i; + } if (ret != 0) { - ARPT_ENTRY_ITERATE(entry0, newinfo->size, - cleanup_entry, &i); + xt_entry_foreach(iter, entry0, newinfo->size) { + if (i-- == 0) + break; + cleanup_entry(iter); + } return ret; } @@ -715,30 +709,10 @@ static int translate_table(const char *name, return ret; } -/* Gets counters. */ -static inline int add_entry_to_counter(const struct arpt_entry *e, - struct xt_counters total[], - unsigned int *i) -{ - ADD_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt); - - (*i)++; - return 0; -} - -static inline int set_entry_to_counter(const struct arpt_entry *e, - struct xt_counters total[], - unsigned int *i) -{ - SET_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt); - - (*i)++; - return 0; -} - static void get_counters(const struct xt_table_info *t, struct xt_counters counters[]) { + struct arpt_entry *iter; unsigned int cpu; unsigned int i; unsigned int curcpu; @@ -754,22 +728,22 @@ static void get_counters(const struct xt_table_info *t, curcpu = smp_processor_id(); i = 0; - ARPT_ENTRY_ITERATE(t->entries[curcpu], - t->size, - set_entry_to_counter, - counters, - &i); + xt_entry_foreach(iter, t->entries[curcpu], t->size) { + SET_COUNTER(counters[i], iter->counters.bcnt, + iter->counters.pcnt); + ++i; + } for_each_possible_cpu(cpu) { if (cpu == curcpu) continue; i = 0; xt_info_wrlock(cpu); - ARPT_ENTRY_ITERATE(t->entries[cpu], - t->size, - add_entry_to_counter, - counters, - &i); + xt_entry_foreach(iter, t->entries[cpu], t->size) { + ADD_COUNTER(counters[i], iter->counters.bcnt, + iter->counters.pcnt); + ++i; + } xt_info_wrunlock(cpu); } local_bh_enable(); @@ -899,7 +873,9 @@ static int compat_calc_entry(const struct arpt_entry *e, static int compat_table_info(const struct xt_table_info *info, struct xt_table_info *newinfo) { + struct arpt_entry *iter; void *loc_cpu_entry; + int ret; if (!newinfo || !info) return -EINVAL; @@ -908,9 +884,12 @@ static int compat_table_info(const struct xt_table_info *info, memcpy(newinfo, info, offsetof(struct xt_table_info, entries)); newinfo->initial_entries = 0; loc_cpu_entry = info->entries[raw_smp_processor_id()]; - return ARPT_ENTRY_ITERATE(loc_cpu_entry, info->size, - compat_calc_entry, info, loc_cpu_entry, - newinfo); + xt_entry_foreach(iter, loc_cpu_entry, info->size) { + ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo); + if (ret != 0) + return ret; + } + return 0; } #endif @@ -1025,6 +1004,7 @@ static int __do_replace(struct net *net, const char *name, struct xt_table_info *oldinfo; struct xt_counters *counters; void *loc_cpu_old_entry; + struct arpt_entry *iter; ret = 0; counters = vmalloc_node(num_counters * sizeof(struct xt_counters), @@ -1068,8 +1048,8 @@ static int __do_replace(struct net *net, const char *name, /* Decrease module usage counts and free resource */ loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()]; - ARPT_ENTRY_ITERATE(loc_cpu_old_entry, oldinfo->size, cleanup_entry, - NULL); + xt_entry_foreach(iter, loc_cpu_old_entry, oldinfo->size) + cleanup_entry(iter); xt_free_table_info(oldinfo); if (copy_to_user(counters_ptr, counters, @@ -1095,6 +1075,7 @@ static int do_replace(struct net *net, const void __user *user, struct arpt_replace tmp; struct xt_table_info *newinfo; void *loc_cpu_entry; + struct arpt_entry *iter; if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) return -EFAULT; @@ -1115,9 +1096,7 @@ static int do_replace(struct net *net, const void __user *user, goto free_newinfo; } - ret = translate_table(tmp.name, tmp.valid_hooks, - newinfo, loc_cpu_entry, tmp.size, tmp.num_entries, - tmp.hook_entry, tmp.underflow); + ret = translate_table(newinfo, loc_cpu_entry, &tmp); if (ret != 0) goto free_newinfo; @@ -1130,25 +1109,13 @@ static int do_replace(struct net *net, const void __user *user, return 0; free_newinfo_untrans: - ARPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry, NULL); + xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) + cleanup_entry(iter); free_newinfo: xt_free_table_info(newinfo); return ret; } -/* We're lazy, and add to the first CPU; overflow works its fey magic - * and everything is OK. */ -static int -add_counter_to_entry(struct arpt_entry *e, - const struct xt_counters addme[], - unsigned int *i) -{ - ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt); - - (*i)++; - return 0; -} - static int do_add_counters(struct net *net, const void __user *user, unsigned int len, int compat) { @@ -1163,6 +1130,7 @@ static int do_add_counters(struct net *net, const void __user *user, const struct xt_table_info *private; int ret = 0; void *loc_cpu_entry; + struct arpt_entry *iter; #ifdef CONFIG_COMPAT struct compat_xt_counters_info compat_tmp; @@ -1220,11 +1188,10 @@ static int do_add_counters(struct net *net, const void __user *user, curcpu = smp_processor_id(); loc_cpu_entry = private->entries[curcpu]; xt_info_wrlock(curcpu); - ARPT_ENTRY_ITERATE(loc_cpu_entry, - private->size, - add_counter_to_entry, - paddc, - &i); + xt_entry_foreach(iter, loc_cpu_entry, private->size) { + ADD_COUNTER(iter->counters, paddc[i].bcnt, paddc[i].pcnt); + ++i; + } xt_info_wrunlock(curcpu); unlock_up_free: local_bh_enable(); @@ -1237,17 +1204,12 @@ static int do_add_counters(struct net *net, const void __user *user, } #ifdef CONFIG_COMPAT -static inline int -compat_release_entry(struct compat_arpt_entry *e, unsigned int *i) +static inline void compat_release_entry(struct compat_arpt_entry *e) { struct arpt_entry_target *t; - if (i && (*i)-- == 0) - return 1; - t = compat_arpt_get_target(e); module_put(t->u.kernel.target->me); - return 0; } static inline int @@ -1258,7 +1220,6 @@ check_compat_entry_size_and_hooks(struct compat_arpt_entry *e, const unsigned char *limit, const unsigned int *hook_entries, const unsigned int *underflows, - unsigned int *i, const char *name) { struct arpt_entry_target *t; @@ -1318,8 +1279,6 @@ check_compat_entry_size_and_hooks(struct compat_arpt_entry *e, /* Clear counters and comefrom */ memset(&e->counters, 0, sizeof(e->counters)); e->comefrom = 0; - - (*i)++; return 0; release_target: @@ -1363,19 +1322,6 @@ compat_copy_entry_from_user(struct compat_arpt_entry *e, void **dstptr, return ret; } -static inline int compat_check_entry(struct arpt_entry *e, const char *name, - unsigned int *i) -{ - int ret; - - ret = check_target(e, name); - if (ret) - return ret; - - (*i)++; - return 0; -} - static int translate_compat_table(const char *name, unsigned int valid_hooks, struct xt_table_info **pinfo, @@ -1388,8 +1334,10 @@ static int translate_compat_table(const char *name, unsigned int i, j; struct xt_table_info *newinfo, *info; void *pos, *entry0, *entry1; + struct compat_arpt_entry *iter0; + struct arpt_entry *iter1; unsigned int size; - int ret; + int ret = 0; info = *pinfo; entry0 = *pentry0; @@ -1406,13 +1354,14 @@ static int translate_compat_table(const char *name, j = 0; xt_compat_lock(NFPROTO_ARP); /* Walk through entries, checking offsets. */ - ret = COMPAT_ARPT_ENTRY_ITERATE(entry0, total_size, - check_compat_entry_size_and_hooks, - info, &size, entry0, - entry0 + total_size, - hook_entries, underflows, &j, name); - if (ret != 0) - goto out_unlock; + xt_entry_foreach(iter0, entry0, total_size) { + ret = check_compat_entry_size_and_hooks(iter0, info, &size, + entry0, entry0 + total_size, hook_entries, underflows, + name); + if (ret != 0) + goto out_unlock; + ++j; + } ret = -EINVAL; if (j != number) { @@ -1451,9 +1400,12 @@ static int translate_compat_table(const char *name, entry1 = newinfo->entries[raw_smp_processor_id()]; pos = entry1; size = total_size; - ret = COMPAT_ARPT_ENTRY_ITERATE(entry0, total_size, - compat_copy_entry_from_user, - &pos, &size, name, newinfo, entry1); + xt_entry_foreach(iter0, entry0, total_size) { + ret = compat_copy_entry_from_user(iter0, &pos, + &size, name, newinfo, entry1); + if (ret != 0) + break; + } xt_compat_flush_offsets(NFPROTO_ARP); xt_compat_unlock(NFPROTO_ARP); if (ret) @@ -1464,13 +1416,32 @@ static int translate_compat_table(const char *name, goto free_newinfo; i = 0; - ret = ARPT_ENTRY_ITERATE(entry1, newinfo->size, compat_check_entry, - name, &i); + xt_entry_foreach(iter1, entry1, newinfo->size) { + ret = check_target(iter1, name); + if (ret != 0) + break; + ++i; + } if (ret) { + /* + * The first i matches need cleanup_entry (calls ->destroy) + * because they had called ->check already. The other j-i + * entries need only release. + */ + int skip = i; j -= i; - COMPAT_ARPT_ENTRY_ITERATE_CONTINUE(entry0, newinfo->size, i, - compat_release_entry, &j); - ARPT_ENTRY_ITERATE(entry1, newinfo->size, cleanup_entry, &i); + xt_entry_foreach(iter0, entry0, newinfo->size) { + if (skip-- > 0) + continue; + if (j-- == 0) + break; + compat_release_entry(iter0); + } + xt_entry_foreach(iter1, entry1, newinfo->size) { + if (i-- == 0) + break; + cleanup_entry(iter1); + } xt_free_table_info(newinfo); return ret; } @@ -1488,7 +1459,11 @@ static int translate_compat_table(const char *name, free_newinfo: xt_free_table_info(newinfo); out: - COMPAT_ARPT_ENTRY_ITERATE(entry0, total_size, compat_release_entry, &j); + xt_entry_foreach(iter0, entry0, total_size) { + if (j-- == 0) + break; + compat_release_entry(iter0); + } return ret; out_unlock: xt_compat_flush_offsets(NFPROTO_ARP); @@ -1515,6 +1490,7 @@ static int compat_do_replace(struct net *net, void __user *user, struct compat_arpt_replace tmp; struct xt_table_info *newinfo; void *loc_cpu_entry; + struct arpt_entry *iter; if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) return -EFAULT; @@ -1552,7 +1528,8 @@ static int compat_do_replace(struct net *net, void __user *user, return 0; free_newinfo_untrans: - ARPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry, NULL); + xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) + cleanup_entry(iter); free_newinfo: xt_free_table_info(newinfo); return ret; @@ -1586,7 +1563,7 @@ static int compat_do_arpt_set_ctl(struct sock *sk, int cmd, void __user *user, static int compat_copy_entry_to_user(struct arpt_entry *e, void __user **dstptr, compat_uint_t *size, struct xt_counters *counters, - unsigned int *i) + unsigned int i) { struct arpt_entry_target *t; struct compat_arpt_entry __user *ce; @@ -1594,14 +1571,12 @@ static int compat_copy_entry_to_user(struct arpt_entry *e, void __user **dstptr, compat_uint_t origsize; int ret; - ret = -EFAULT; origsize = *size; ce = (struct compat_arpt_entry __user *)*dstptr; - if (copy_to_user(ce, e, sizeof(struct arpt_entry))) - goto out; - - if (copy_to_user(&ce->counters, &counters[*i], sizeof(counters[*i]))) - goto out; + if (copy_to_user(ce, e, sizeof(struct arpt_entry)) != 0 || + copy_to_user(&ce->counters, &counters[i], + sizeof(counters[i])) != 0) + return -EFAULT; *dstptr += sizeof(struct compat_arpt_entry); *size -= sizeof(struct arpt_entry) - sizeof(struct compat_arpt_entry); @@ -1611,18 +1586,12 @@ static int compat_copy_entry_to_user(struct arpt_entry *e, void __user **dstptr, t = arpt_get_target(e); ret = xt_compat_target_to_user(t, dstptr, size); if (ret) - goto out; - ret = -EFAULT; + return ret; next_offset = e->next_offset - (origsize - *size); - if (put_user(target_offset, &ce->target_offset)) - goto out; - if (put_user(next_offset, &ce->next_offset)) - goto out; - - (*i)++; + if (put_user(target_offset, &ce->target_offset) != 0 || + put_user(next_offset, &ce->next_offset) != 0) + return -EFAULT; return 0; -out: - return ret; } static int compat_copy_entries_to_user(unsigned int total_size, @@ -1636,6 +1605,7 @@ static int compat_copy_entries_to_user(unsigned int total_size, int ret = 0; void *loc_cpu_entry; unsigned int i = 0; + struct arpt_entry *iter; counters = alloc_counters(table); if (IS_ERR(counters)) @@ -1645,9 +1615,12 @@ static int compat_copy_entries_to_user(unsigned int total_size, loc_cpu_entry = private->entries[raw_smp_processor_id()]; pos = userptr; size = total_size; - ret = ARPT_ENTRY_ITERATE(loc_cpu_entry, total_size, - compat_copy_entry_to_user, - &pos, &size, counters, &i); + xt_entry_foreach(iter, loc_cpu_entry, total_size) { + ret = compat_copy_entry_to_user(iter, &pos, + &size, counters, i++); + if (ret != 0) + break; + } vfree(counters); return ret; } @@ -1815,12 +1788,7 @@ struct xt_table *arpt_register_table(struct net *net, loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; memcpy(loc_cpu_entry, repl->entries, repl->size); - ret = translate_table(table->name, table->valid_hooks, - newinfo, loc_cpu_entry, repl->size, - repl->num_entries, - repl->hook_entry, - repl->underflow); - + ret = translate_table(newinfo, loc_cpu_entry, repl); duprintf("arpt_register_table: translate table gives %d\n", ret); if (ret != 0) goto out_free; @@ -1843,13 +1811,14 @@ void arpt_unregister_table(struct xt_table *table) struct xt_table_info *private; void *loc_cpu_entry; struct module *table_owner = table->me; + struct arpt_entry *iter; private = xt_unregister_table(table); /* Decrease module usage counts and free resources */ loc_cpu_entry = private->entries[raw_smp_processor_id()]; - ARPT_ENTRY_ITERATE(loc_cpu_entry, private->size, - cleanup_entry, NULL); + xt_entry_foreach(iter, loc_cpu_entry, private->size) + cleanup_entry(iter); if (private->number > private->initial_entries) module_put(table_owner); xt_free_table_info(private); diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c index e94c18bdfc6..c92f4e541cf 100644 --- a/net/ipv4/netfilter/ip_tables.c +++ b/net/ipv4/netfilter/ip_tables.c @@ -288,6 +288,7 @@ static void trace_packet(const struct sk_buff *skb, const void *table_base; const struct ipt_entry *root; const char *hookname, *chainname, *comment; + const struct ipt_entry *iter; unsigned int rulenum = 0; table_base = private->entries[smp_processor_id()]; @@ -296,10 +297,10 @@ static void trace_packet(const struct sk_buff *skb, hookname = chainname = hooknames[hook]; comment = comments[NF_IP_TRACE_COMMENT_RULE]; - IPT_ENTRY_ITERATE(root, - private->size - private->hook_entry[hook], - get_chainname_rulenum, - e, hookname, &chainname, &comment, &rulenum); + xt_entry_foreach(iter, root, private->size - private->hook_entry[hook]) + if (get_chainname_rulenum(iter, e, hookname, + &chainname, &comment, &rulenum) != 0) + break; nf_log_packet(AF_INET, hook, skb, in, out, &trace_loginfo, "TRACE: %s:%s:%s:%u ", @@ -365,16 +366,21 @@ ipt_do_table(struct sk_buff *skb, do { const struct ipt_entry_target *t; + const struct xt_entry_match *ematch; IP_NF_ASSERT(e); IP_NF_ASSERT(back); if (!ip_packet_match(ip, indev, outdev, - &e->ip, mtpar.fragoff) || - IPT_MATCH_ITERATE(e, do_match, skb, &mtpar) != 0) { + &e->ip, mtpar.fragoff)) { + no_match: e = ipt_next_entry(e); continue; } + xt_ematch_foreach(ematch, e) + if (do_match(ematch, skb, &mtpar) != 0) + goto no_match; + ADD_COUNTER(e->counters, ntohs(ip->tot_len), 1); t = ipt_get_target(e); @@ -566,14 +572,10 @@ mark_source_chains(const struct xt_table_info *newinfo, return 1; } -static int -cleanup_match(struct ipt_entry_match *m, struct net *net, unsigned int *i) +static void cleanup_match(struct ipt_entry_match *m, struct net *net) { struct xt_mtdtor_param par; - if (i && (*i)-- == 0) - return 1; - par.net = net; par.match = m->u.kernel.match; par.matchinfo = m->data; @@ -581,7 +583,6 @@ cleanup_match(struct ipt_entry_match *m, struct net *net, unsigned int *i) if (par.match->destroy != NULL) par.match->destroy(&par); module_put(par.match->me); - return 0; } static int @@ -606,8 +607,7 @@ check_entry(const struct ipt_entry *e, const char *name) } static int -check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par, - unsigned int *i) +check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par) { const struct ipt_ip *ip = par->entryinfo; int ret; @@ -622,13 +622,11 @@ check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par, par.match->name); return ret; } - ++*i; return 0; } static int -find_check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par, - unsigned int *i) +find_check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par) { struct xt_match *match; int ret; @@ -642,7 +640,7 @@ find_check_match(struct ipt_entry_match *m, struct xt_mtchk_param *par, } m->u.kernel.match = match; - ret = check_match(m, par, i); + ret = check_match(m, par); if (ret) goto err; @@ -678,13 +676,14 @@ static int check_target(struct ipt_entry *e, struct net *net, const char *name) static int find_check_entry(struct ipt_entry *e, struct net *net, const char *name, - unsigned int size, unsigned int *i) + unsigned int size) { struct ipt_entry_target *t; struct xt_target *target; int ret; unsigned int j; struct xt_mtchk_param mtpar; + struct xt_entry_match *ematch; ret = check_entry(e, name); if (ret) @@ -696,9 +695,12 @@ find_check_entry(struct ipt_entry *e, struct net *net, const char *name, mtpar.entryinfo = &e->ip; mtpar.hook_mask = e->comefrom; mtpar.family = NFPROTO_IPV4; - ret = IPT_MATCH_ITERATE(e, find_check_match, &mtpar, &j); - if (ret != 0) - goto cleanup_matches; + xt_ematch_foreach(ematch, e) { + ret = find_check_match(ematch, &mtpar); + if (ret != 0) + goto cleanup_matches; + ++j; + } t = ipt_get_target(e); target = try_then_request_module(xt_find_target(AF_INET, @@ -715,13 +717,15 @@ find_check_entry(struct ipt_entry *e, struct net *net, const char *name, ret = check_target(e, net, name); if (ret) goto err; - - (*i)++; return 0; err: module_put(t->u.kernel.target->me); cleanup_matches: - IPT_MATCH_ITERATE(e, cleanup_match, net, &j); + xt_ematch_foreach(ematch, e) { + if (j-- == 0) + break; + cleanup_match(ematch, net); + } return ret; } @@ -747,8 +751,7 @@ check_entry_size_and_hooks(struct ipt_entry *e, const unsigned char *limit, const unsigned int *hook_entries, const unsigned int *underflows, - unsigned int valid_hooks, - unsigned int *i) + unsigned int valid_hooks) { unsigned int h; @@ -785,22 +788,19 @@ check_entry_size_and_hooks(struct ipt_entry *e, /* Clear counters and comefrom */ e->counters = ((struct xt_counters) { 0, 0 }); e->comefrom = 0; - - (*i)++; return 0; } -static int -cleanup_entry(struct ipt_entry *e, struct net *net, unsigned int *i) +static void +cleanup_entry(struct ipt_entry *e, struct net *net) { struct xt_tgdtor_param par; struct ipt_entry_target *t; - - if (i && (*i)-- == 0) - return 1; + struct xt_entry_match *ematch; /* Cleanup all matches */ - IPT_MATCH_ITERATE(e, cleanup_match, net, NULL); + xt_ematch_foreach(ematch, e) + cleanup_match(ematch, net); t = ipt_get_target(e); par.net = net; @@ -810,27 +810,20 @@ cleanup_entry(struct ipt_entry *e, struct net *net, unsigned int *i) if (par.target->destroy != NULL) par.target->destroy(&par); module_put(par.target->me); - return 0; } /* Checks and translates the user-supplied table segment (held in newinfo) */ static int -translate_table(struct net *net, - const char *name, - unsigned int valid_hooks, - struct xt_table_info *newinfo, - void *entry0, - unsigned int size, - unsigned int number, - const unsigned int *hook_entries, - const unsigned int *underflows) +translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0, + const struct ipt_replace *repl) { + struct ipt_entry *iter; unsigned int i; - int ret; + int ret = 0; - newinfo->size = size; - newinfo->number = number; + newinfo->size = repl->size; + newinfo->number = repl->num_entries; /* Init all hooks to impossible value. */ for (i = 0; i < NF_INET_NUMHOOKS; i++) { @@ -841,49 +834,56 @@ translate_table(struct net *net, duprintf("translate_table: size %u\n", newinfo->size); i = 0; /* Walk through entries, checking offsets. */ - ret = IPT_ENTRY_ITERATE(entry0, newinfo->size, - check_entry_size_and_hooks, - newinfo, - entry0, - entry0 + size, - hook_entries, underflows, valid_hooks, &i); - if (ret != 0) - return ret; + xt_entry_foreach(iter, entry0, newinfo->size) { + ret = check_entry_size_and_hooks(iter, newinfo, entry0, + entry0 + repl->size, repl->hook_entry, repl->underflow, + repl->valid_hooks); + if (ret != 0) + return ret; + ++i; + } - if (i != number) { + if (i != repl->num_entries) { duprintf("translate_table: %u not %u entries\n", - i, number); + i, repl->num_entries); return -EINVAL; } /* Check hooks all assigned */ for (i = 0; i < NF_INET_NUMHOOKS; i++) { /* Only hooks which are valid */ - if (!(valid_hooks & (1 << i))) + if (!(repl->valid_hooks & (1 << i))) continue; if (newinfo->hook_entry[i] == 0xFFFFFFFF) { duprintf("Invalid hook entry %u %u\n", - i, hook_entries[i]); + i, repl->hook_entry[i]); return -EINVAL; } if (newinfo->underflow[i] == 0xFFFFFFFF) { duprintf("Invalid underflow %u %u\n", - i, underflows[i]); + i, repl->underflow[i]); return -EINVAL; } } - if (!mark_source_chains(newinfo, valid_hooks, entry0)) + if (!mark_source_chains(newinfo, repl->valid_hooks, entry0)) return -ELOOP; /* Finally, each sanity check must pass */ i = 0; - ret = IPT_ENTRY_ITERATE(entry0, newinfo->size, - find_check_entry, net, name, size, &i); + xt_entry_foreach(iter, entry0, newinfo->size) { + ret = find_check_entry(iter, net, repl->name, repl->size); + if (ret != 0) + break; + ++i; + } if (ret != 0) { - IPT_ENTRY_ITERATE(entry0, newinfo->size, - cleanup_entry, net, &i); + xt_entry_foreach(iter, entry0, newinfo->size) { + if (i-- == 0) + break; + cleanup_entry(iter, net); + } return ret; } @@ -896,33 +896,11 @@ translate_table(struct net *net, return ret; } -/* Gets counters. */ -static inline int -add_entry_to_counter(const struct ipt_entry *e, - struct xt_counters total[], - unsigned int *i) -{ - ADD_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt); - - (*i)++; - return 0; -} - -static inline int -set_entry_to_counter(const struct ipt_entry *e, - struct ipt_counters total[], - unsigned int *i) -{ - SET_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt); - - (*i)++; - return 0; -} - static void get_counters(const struct xt_table_info *t, struct xt_counters counters[]) { + struct ipt_entry *iter; unsigned int cpu; unsigned int i; unsigned int curcpu; @@ -938,22 +916,22 @@ get_counters(const struct xt_table_info *t, curcpu = smp_processor_id(); i = 0; - IPT_ENTRY_ITERATE(t->entries[curcpu], - t->size, - set_entry_to_counter, - counters, - &i); + xt_entry_foreach(iter, t->entries[curcpu], t->size) { + SET_COUNTER(counters[i], iter->counters.bcnt, + iter->counters.pcnt); + ++i; + } for_each_possible_cpu(cpu) { if (cpu == curcpu) continue; i = 0; xt_info_wrlock(cpu); - IPT_ENTRY_ITERATE(t->entries[cpu], - t->size, - add_entry_to_counter, - counters, - &i); + xt_entry_foreach(iter, t->entries[cpu], t->size) { + ADD_COUNTER(counters[i], iter->counters.bcnt, + iter->counters.pcnt); + ++i; /* macro does multi eval of i */ + } xt_info_wrunlock(cpu); } local_bh_enable(); @@ -1072,24 +1050,19 @@ static int compat_standard_to_user(void __user *dst, const void *src) return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0; } -static inline int -compat_calc_match(const struct ipt_entry_match *m, int *size) -{ - *size += xt_compat_match_offset(m->u.kernel.match); - return 0; -} - static int compat_calc_entry(const struct ipt_entry *e, const struct xt_table_info *info, const void *base, struct xt_table_info *newinfo) { + const struct xt_entry_match *ematch; const struct ipt_entry_target *t; unsigned int entry_offset; int off, i, ret; off = sizeof(struct ipt_entry) - sizeof(struct compat_ipt_entry); entry_offset = (void *)e - base; - IPT_MATCH_ITERATE(e, compat_calc_match, &off); + xt_ematch_foreach(ematch, e) + off += xt_compat_match_offset(ematch->u.kernel.match); t = ipt_get_target_c(e); off += xt_compat_target_offset(t->u.kernel.target); newinfo->size -= off; @@ -1111,7 +1084,9 @@ static int compat_calc_entry(const struct ipt_entry *e, static int compat_table_info(const struct xt_table_info *info, struct xt_table_info *newinfo) { + struct ipt_entry *iter; void *loc_cpu_entry; + int ret; if (!newinfo || !info) return -EINVAL; @@ -1120,9 +1095,12 @@ static int compat_table_info(const struct xt_table_info *info, memcpy(newinfo, info, offsetof(struct xt_table_info, entries)); newinfo->initial_entries = 0; loc_cpu_entry = info->entries[raw_smp_processor_id()]; - return IPT_ENTRY_ITERATE(loc_cpu_entry, info->size, - compat_calc_entry, info, loc_cpu_entry, - newinfo); + xt_entry_foreach(iter, loc_cpu_entry, info->size) { + ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo); + if (ret != 0) + return ret; + } + return 0; } #endif @@ -1236,6 +1214,7 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks, struct xt_table_info *oldinfo; struct xt_counters *counters; void *loc_cpu_old_entry; + struct ipt_entry *iter; ret = 0; counters = vmalloc(num_counters * sizeof(struct xt_counters)); @@ -1278,8 +1257,9 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks, /* Decrease module usage counts and free resource */ loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()]; - IPT_ENTRY_ITERATE(loc_cpu_old_entry, oldinfo->size, cleanup_entry, - net, NULL); + xt_entry_foreach(iter, loc_cpu_old_entry, oldinfo->size) + cleanup_entry(iter, net); + xt_free_table_info(oldinfo); if (copy_to_user(counters_ptr, counters, sizeof(struct xt_counters) * num_counters) != 0) @@ -1304,6 +1284,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len) struct ipt_replace tmp; struct xt_table_info *newinfo; void *loc_cpu_entry; + struct ipt_entry *iter; if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) return -EFAULT; @@ -1324,9 +1305,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len) goto free_newinfo; } - ret = translate_table(net, tmp.name, tmp.valid_hooks, - newinfo, loc_cpu_entry, tmp.size, tmp.num_entries, - tmp.hook_entry, tmp.underflow); + ret = translate_table(net, newinfo, loc_cpu_entry, &tmp); if (ret != 0) goto free_newinfo; @@ -1339,25 +1318,13 @@ do_replace(struct net *net, const void __user *user, unsigned int len) return 0; free_newinfo_untrans: - IPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry, net, NULL); + xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) + cleanup_entry(iter, net); free_newinfo: xt_free_table_info(newinfo); return ret; } -/* We're lazy, and add to the first CPU; overflow works its fey magic - * and everything is OK. */ -static int -add_counter_to_entry(struct ipt_entry *e, - const struct xt_counters addme[], - unsigned int *i) -{ - ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt); - - (*i)++; - return 0; -} - static int do_add_counters(struct net *net, const void __user *user, unsigned int len, int compat) @@ -1373,6 +1340,7 @@ do_add_counters(struct net *net, const void __user *user, const struct xt_table_info *private; int ret = 0; void *loc_cpu_entry; + struct ipt_entry *iter; #ifdef CONFIG_COMPAT struct compat_xt_counters_info compat_tmp; @@ -1430,11 +1398,10 @@ do_add_counters(struct net *net, const void __user *user, curcpu = smp_processor_id(); loc_cpu_entry = private->entries[curcpu]; xt_info_wrlock(curcpu); - IPT_ENTRY_ITERATE(loc_cpu_entry, - private->size, - add_counter_to_entry, - paddc, - &i); + xt_entry_foreach(iter, loc_cpu_entry, private->size) { + ADD_COUNTER(iter->counters, paddc[i].bcnt, paddc[i].pcnt); + ++i; + } xt_info_wrunlock(curcpu); unlock_up_free: local_bh_enable(); @@ -1462,45 +1429,40 @@ struct compat_ipt_replace { static int compat_copy_entry_to_user(struct ipt_entry *e, void __user **dstptr, unsigned int *size, struct xt_counters *counters, - unsigned int *i) + unsigned int i) { struct ipt_entry_target *t; struct compat_ipt_entry __user *ce; u_int16_t target_offset, next_offset; compat_uint_t origsize; - int ret; + const struct xt_entry_match *ematch; + int ret = 0; - ret = -EFAULT; origsize = *size; ce = (struct compat_ipt_entry __user *)*dstptr; - if (copy_to_user(ce, e, sizeof(struct ipt_entry))) - goto out; - - if (copy_to_user(&ce->counters, &counters[*i], sizeof(counters[*i]))) - goto out; + if (copy_to_user(ce, e, sizeof(struct ipt_entry)) != 0 || + copy_to_user(&ce->counters, &counters[i], + sizeof(counters[i])) != 0) + return -EFAULT; *dstptr += sizeof(struct compat_ipt_entry); *size -= sizeof(struct ipt_entry) - sizeof(struct compat_ipt_entry); - ret = IPT_MATCH_ITERATE(e, xt_compat_match_to_user, dstptr, size); + xt_ematch_foreach(ematch, e) { + ret = xt_compat_match_to_user(ematch, dstptr, size); + if (ret != 0) + return ret; + } target_offset = e->target_offset - (origsize - *size); - if (ret) - goto out; t = ipt_get_target(e); ret = xt_compat_target_to_user(t, dstptr, size); if (ret) - goto out; - ret = -EFAULT; + return ret; next_offset = e->next_offset - (origsize - *size); - if (put_user(target_offset, &ce->target_offset)) - goto out; - if (put_user(next_offset, &ce->next_offset)) - goto out; - - (*i)++; + if (put_user(target_offset, &ce->target_offset) != 0 || + put_user(next_offset, &ce->next_offset) != 0) + return -EFAULT; return 0; -out: - return ret; } static int @@ -1508,7 +1470,7 @@ compat_find_calc_match(struct ipt_entry_match *m, const char *name, const struct ipt_ip *ip, unsigned int hookmask, - int *size, unsigned int *i) + int *size) { struct xt_match *match; @@ -1522,34 +1484,19 @@ compat_find_calc_match(struct ipt_entry_match *m, } m->u.kernel.match = match; *size += xt_compat_match_offset(match); - - (*i)++; return 0; } -static int -compat_release_match(struct ipt_entry_match *m, unsigned int *i) -{ - if (i && (*i)-- == 0) - return 1; - - module_put(m->u.kernel.match->me); - return 0; -} - -static int -compat_release_entry(struct compat_ipt_entry *e, unsigned int *i) +static void compat_release_entry(struct compat_ipt_entry *e) { struct ipt_entry_target *t; - - if (i && (*i)-- == 0) - return 1; + struct xt_entry_match *ematch; /* Cleanup all matches */ - COMPAT_IPT_MATCH_ITERATE(e, compat_release_match, NULL); + xt_ematch_foreach(ematch, e) + module_put(ematch->u.kernel.match->me); t = compat_ipt_get_target(e); module_put(t->u.kernel.target->me); - return 0; } static int @@ -1560,9 +1507,9 @@ check_compat_entry_size_and_hooks(struct compat_ipt_entry *e, const unsigned char *limit, const unsigned int *hook_entries, const unsigned int *underflows, - unsigned int *i, const char *name) { + struct xt_entry_match *ematch; struct ipt_entry_target *t; struct xt_target *target; unsigned int entry_offset; @@ -1591,10 +1538,13 @@ check_compat_entry_size_and_hooks(struct compat_ipt_entry *e, off = sizeof(struct ipt_entry) - sizeof(struct compat_ipt_entry); entry_offset = (void *)e - (void *)base; j = 0; - ret = COMPAT_IPT_MATCH_ITERATE(e, compat_find_calc_match, name, - &e->ip, e->comefrom, &off, &j); - if (ret != 0) - goto release_matches; + xt_ematch_foreach(ematch, e) { + ret = compat_find_calc_match(ematch, name, + &e->ip, e->comefrom, &off); + if (ret != 0) + goto release_matches; + ++j; + } t = compat_ipt_get_target(e); target = try_then_request_module(xt_find_target(AF_INET, @@ -1626,14 +1576,16 @@ check_compat_entry_size_and_hooks(struct compat_ipt_entry *e, /* Clear counters and comefrom */ memset(&e->counters, 0, sizeof(e->counters)); e->comefrom = 0; - - (*i)++; return 0; out: module_put(t->u.kernel.target->me); release_matches: - IPT_MATCH_ITERATE(e, compat_release_match, &j); + xt_ematch_foreach(ematch, e) { + if (j-- == 0) + break; + module_put(ematch->u.kernel.match->me); + } return ret; } @@ -1647,6 +1599,7 @@ compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr, struct ipt_entry *de; unsigned int origsize; int ret, h; + struct xt_entry_match *ematch; ret = 0; origsize = *size; @@ -1657,10 +1610,11 @@ compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr, *dstptr += sizeof(struct ipt_entry); *size += sizeof(struct ipt_entry) - sizeof(struct compat_ipt_entry); - ret = COMPAT_IPT_MATCH_ITERATE(e, xt_compat_match_from_user, - dstptr, size); - if (ret) - return ret; + xt_ematch_foreach(ematch, e) { + ret = xt_compat_match_from_user(ematch, dstptr, size); + if (ret != 0) + return ret; + } de->target_offset = e->target_offset - (origsize - *size); t = compat_ipt_get_target(e); target = t->u.kernel.target; @@ -1677,12 +1631,12 @@ compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr, } static int -compat_check_entry(struct ipt_entry *e, struct net *net, const char *name, - unsigned int *i) +compat_check_entry(struct ipt_entry *e, struct net *net, const char *name) { + struct xt_entry_match *ematch; struct xt_mtchk_param mtpar; unsigned int j; - int ret; + int ret = 0; j = 0; mtpar.net = net; @@ -1690,19 +1644,24 @@ compat_check_entry(struct ipt_entry *e, struct net *net, const char *name, mtpar.entryinfo = &e->ip; mtpar.hook_mask = e->comefrom; mtpar.family = NFPROTO_IPV4; - ret = IPT_MATCH_ITERATE(e, check_match, &mtpar, &j); - if (ret) - goto cleanup_matches; + xt_ematch_foreach(ematch, e) { + ret = check_match(ematch, &mtpar); + if (ret != 0) + goto cleanup_matches; + ++j; + } ret = check_target(e, net, name); if (ret) goto cleanup_matches; - - (*i)++; return 0; cleanup_matches: - IPT_MATCH_ITERATE(e, cleanup_match, net, &j); + xt_ematch_foreach(ematch, e) { + if (j-- == 0) + break; + cleanup_match(ematch, net); + } return ret; } @@ -1720,6 +1679,8 @@ translate_compat_table(struct net *net, unsigned int i, j; struct xt_table_info *newinfo, *info; void *pos, *entry0, *entry1; + struct compat_ipt_entry *iter0; + struct ipt_entry *iter1; unsigned int size; int ret; @@ -1738,13 +1699,14 @@ translate_compat_table(struct net *net, j = 0; xt_compat_lock(AF_INET); /* Walk through entries, checking offsets. */ - ret = COMPAT_IPT_ENTRY_ITERATE(entry0, total_size, - check_compat_entry_size_and_hooks, - info, &size, entry0, - entry0 + total_size, - hook_entries, underflows, &j, name); - if (ret != 0) - goto out_unlock; + xt_entry_foreach(iter0, entry0, total_size) { + ret = check_compat_entry_size_and_hooks(iter0, info, &size, + entry0, entry0 + total_size, hook_entries, underflows, + name); + if (ret != 0) + goto out_unlock; + ++j; + } ret = -EINVAL; if (j != number) { @@ -1783,9 +1745,12 @@ translate_compat_table(struct net *net, entry1 = newinfo->entries[raw_smp_processor_id()]; pos = entry1; size = total_size; - ret = COMPAT_IPT_ENTRY_ITERATE(entry0, total_size, - compat_copy_entry_from_user, - &pos, &size, name, newinfo, entry1); + xt_entry_foreach(iter0, entry0, total_size) { + ret = compat_copy_entry_from_user(iter0, &pos, + &size, name, newinfo, entry1); + if (ret != 0) + break; + } xt_compat_flush_offsets(AF_INET); xt_compat_unlock(AF_INET); if (ret) @@ -1796,13 +1761,32 @@ translate_compat_table(struct net *net, goto free_newinfo; i = 0; - ret = IPT_ENTRY_ITERATE(entry1, newinfo->size, compat_check_entry, - net, name, &i); + xt_entry_foreach(iter1, entry1, newinfo->size) { + ret = compat_check_entry(iter1, net, name); + if (ret != 0) + break; + ++i; + } if (ret) { + /* + * The first i matches need cleanup_entry (calls ->destroy) + * because they had called ->check already. The other j-i + * entries need only release. + */ + int skip = i; j -= i; - COMPAT_IPT_ENTRY_ITERATE_CONTINUE(entry0, newinfo->size, i, - compat_release_entry, &j); - IPT_ENTRY_ITERATE(entry1, newinfo->size, cleanup_entry, net, &i); + xt_entry_foreach(iter0, entry0, newinfo->size) { + if (skip-- > 0) + continue; + if (j-- == 0) + break; + compat_release_entry(iter0); + } + xt_entry_foreach(iter1, entry1, newinfo->size) { + if (i-- == 0) + break; + cleanup_entry(iter1, net); + } xt_free_table_info(newinfo); return ret; } @@ -1820,7 +1804,11 @@ translate_compat_table(struct net *net, free_newinfo: xt_free_table_info(newinfo); out: - COMPAT_IPT_ENTRY_ITERATE(entry0, total_size, compat_release_entry, &j); + xt_entry_foreach(iter0, entry0, total_size) { + if (j-- == 0) + break; + compat_release_entry(iter0); + } return ret; out_unlock: xt_compat_flush_offsets(AF_INET); @@ -1835,6 +1823,7 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len) struct compat_ipt_replace tmp; struct xt_table_info *newinfo; void *loc_cpu_entry; + struct ipt_entry *iter; if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) return -EFAULT; @@ -1873,7 +1862,8 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len) return 0; free_newinfo_untrans: - IPT_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry, net, NULL); + xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) + cleanup_entry(iter, net); free_newinfo: xt_free_table_info(newinfo); return ret; @@ -1922,6 +1912,7 @@ compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table, int ret = 0; const void *loc_cpu_entry; unsigned int i = 0; + struct ipt_entry *iter; counters = alloc_counters(table); if (IS_ERR(counters)) @@ -1934,9 +1925,12 @@ compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table, loc_cpu_entry = private->entries[raw_smp_processor_id()]; pos = userptr; size = total_size; - ret = IPT_ENTRY_ITERATE(loc_cpu_entry, total_size, - compat_copy_entry_to_user, - &pos, &size, counters, &i); + xt_entry_foreach(iter, loc_cpu_entry, total_size) { + ret = compat_copy_entry_to_user(iter, &pos, + &size, counters, i++); + if (ret != 0) + break; + } vfree(counters); return ret; @@ -2110,11 +2104,7 @@ struct xt_table *ipt_register_table(struct net *net, loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; memcpy(loc_cpu_entry, repl->entries, repl->size); - ret = translate_table(net, table->name, table->valid_hooks, - newinfo, loc_cpu_entry, repl->size, - repl->num_entries, - repl->hook_entry, - repl->underflow); + ret = translate_table(net, newinfo, loc_cpu_entry, repl); if (ret != 0) goto out_free; @@ -2137,12 +2127,14 @@ void ipt_unregister_table(struct net *net, struct xt_table *table) struct xt_table_info *private; void *loc_cpu_entry; struct module *table_owner = table->me; + struct ipt_entry *iter; private = xt_unregister_table(table); /* Decrease module usage counts and free resources */ loc_cpu_entry = private->entries[raw_smp_processor_id()]; - IPT_ENTRY_ITERATE(loc_cpu_entry, private->size, cleanup_entry, net, NULL); + xt_entry_foreach(iter, loc_cpu_entry, private->size) + cleanup_entry(iter, net); if (private->number > private->initial_entries) module_put(table_owner); xt_free_table_info(private); diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c index 4185099c294..f7042869198 100644 --- a/net/ipv6/netfilter/ip6_tables.c +++ b/net/ipv6/netfilter/ip6_tables.c @@ -318,6 +318,7 @@ static void trace_packet(const struct sk_buff *skb, const void *table_base; const struct ip6t_entry *root; const char *hookname, *chainname, *comment; + const struct ip6t_entry *iter; unsigned int rulenum = 0; table_base = private->entries[smp_processor_id()]; @@ -326,10 +327,10 @@ static void trace_packet(const struct sk_buff *skb, hookname = chainname = hooknames[hook]; comment = comments[NF_IP6_TRACE_COMMENT_RULE]; - IP6T_ENTRY_ITERATE(root, - private->size - private->hook_entry[hook], - get_chainname_rulenum, - e, hookname, &chainname, &comment, &rulenum); + xt_entry_foreach(iter, root, private->size - private->hook_entry[hook]) + if (get_chainname_rulenum(iter, e, hookname, + &chainname, &comment, &rulenum) != 0) + break; nf_log_packet(AF_INET6, hook, skb, in, out, &trace_loginfo, "TRACE: %s:%s:%s:%u ", @@ -392,16 +393,21 @@ ip6t_do_table(struct sk_buff *skb, do { const struct ip6t_entry_target *t; + const struct xt_entry_match *ematch; IP_NF_ASSERT(e); IP_NF_ASSERT(back); if (!ip6_packet_match(skb, indev, outdev, &e->ipv6, - &mtpar.thoff, &mtpar.fragoff, &hotdrop) || - IP6T_MATCH_ITERATE(e, do_match, skb, &mtpar) != 0) { + &mtpar.thoff, &mtpar.fragoff, &hotdrop)) { + no_match: e = ip6t_next_entry(e); continue; } + xt_ematch_foreach(ematch, e) + if (do_match(ematch, skb, &mtpar) != 0) + goto no_match; + ADD_COUNTER(e->counters, ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr), 1); @@ -597,14 +603,10 @@ mark_source_chains(const struct xt_table_info *newinfo, return 1; } -static int -cleanup_match(struct ip6t_entry_match *m, struct net *net, unsigned int *i) +static void cleanup_match(struct ip6t_entry_match *m, struct net *net) { struct xt_mtdtor_param par; - if (i && (*i)-- == 0) - return 1; - par.net = net; par.match = m->u.kernel.match; par.matchinfo = m->data; @@ -612,7 +614,6 @@ cleanup_match(struct ip6t_entry_match *m, struct net *net, unsigned int *i) if (par.match->destroy != NULL) par.match->destroy(&par); module_put(par.match->me); - return 0; } static int @@ -636,8 +637,7 @@ check_entry(const struct ip6t_entry *e, const char *name) return 0; } -static int check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par, - unsigned int *i) +static int check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par) { const struct ip6t_ip6 *ipv6 = par->entryinfo; int ret; @@ -652,13 +652,11 @@ static int check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par, par.match->name); return ret; } - ++*i; return 0; } static int -find_check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par, - unsigned int *i) +find_check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par) { struct xt_match *match; int ret; @@ -672,7 +670,7 @@ find_check_match(struct ip6t_entry_match *m, struct xt_mtchk_param *par, } m->u.kernel.match = match; - ret = check_match(m, par, i); + ret = check_match(m, par); if (ret) goto err; @@ -709,13 +707,14 @@ static int check_target(struct ip6t_entry *e, struct net *net, const char *name) static int find_check_entry(struct ip6t_entry *e, struct net *net, const char *name, - unsigned int size, unsigned int *i) + unsigned int size) { struct ip6t_entry_target *t; struct xt_target *target; int ret; unsigned int j; struct xt_mtchk_param mtpar; + struct xt_entry_match *ematch; ret = check_entry(e, name); if (ret) @@ -727,9 +726,12 @@ find_check_entry(struct ip6t_entry *e, struct net *net, const char *name, mtpar.entryinfo = &e->ipv6; mtpar.hook_mask = e->comefrom; mtpar.family = NFPROTO_IPV6; - ret = IP6T_MATCH_ITERATE(e, find_check_match, &mtpar, &j); - if (ret != 0) - goto cleanup_matches; + xt_ematch_foreach(ematch, e) { + ret = find_check_match(ematch, &mtpar); + if (ret != 0) + goto cleanup_matches; + ++j; + } t = ip6t_get_target(e); target = try_then_request_module(xt_find_target(AF_INET6, @@ -746,13 +748,15 @@ find_check_entry(struct ip6t_entry *e, struct net *net, const char *name, ret = check_target(e, net, name); if (ret) goto err; - - (*i)++; return 0; err: module_put(t->u.kernel.target->me); cleanup_matches: - IP6T_MATCH_ITERATE(e, cleanup_match, net, &j); + xt_ematch_foreach(ematch, e) { + if (j-- == 0) + break; + cleanup_match(ematch, net); + } return ret; } @@ -778,8 +782,7 @@ check_entry_size_and_hooks(struct ip6t_entry *e, const unsigned char *limit, const unsigned int *hook_entries, const unsigned int *underflows, - unsigned int valid_hooks, - unsigned int *i) + unsigned int valid_hooks) { unsigned int h; @@ -816,22 +819,18 @@ check_entry_size_and_hooks(struct ip6t_entry *e, /* Clear counters and comefrom */ e->counters = ((struct xt_counters) { 0, 0 }); e->comefrom = 0; - - (*i)++; return 0; } -static int -cleanup_entry(struct ip6t_entry *e, struct net *net, unsigned int *i) +static void cleanup_entry(struct ip6t_entry *e, struct net *net) { struct xt_tgdtor_param par; struct ip6t_entry_target *t; - - if (i && (*i)-- == 0) - return 1; + struct xt_entry_match *ematch; /* Cleanup all matches */ - IP6T_MATCH_ITERATE(e, cleanup_match, net, NULL); + xt_ematch_foreach(ematch, e) + cleanup_match(ematch, net); t = ip6t_get_target(e); par.net = net; @@ -841,27 +840,20 @@ cleanup_entry(struct ip6t_entry *e, struct net *net, unsigned int *i) if (par.target->destroy != NULL) par.target->destroy(&par); module_put(par.target->me); - return 0; } /* Checks and translates the user-supplied table segment (held in newinfo) */ static int -translate_table(struct net *net, - const char *name, - unsigned int valid_hooks, - struct xt_table_info *newinfo, - void *entry0, - unsigned int size, - unsigned int number, - const unsigned int *hook_entries, - const unsigned int *underflows) +translate_table(struct net *net, struct xt_table_info *newinfo, void *entry0, + const struct ip6t_replace *repl) { + struct ip6t_entry *iter; unsigned int i; - int ret; + int ret = 0; - newinfo->size = size; - newinfo->number = number; + newinfo->size = repl->size; + newinfo->number = repl->num_entries; /* Init all hooks to impossible value. */ for (i = 0; i < NF_INET_NUMHOOKS; i++) { @@ -872,49 +864,56 @@ translate_table(struct net *net, duprintf("translate_table: size %u\n", newinfo->size); i = 0; /* Walk through entries, checking offsets. */ - ret = IP6T_ENTRY_ITERATE(entry0, newinfo->size, - check_entry_size_and_hooks, - newinfo, - entry0, - entry0 + size, - hook_entries, underflows, valid_hooks, &i); - if (ret != 0) - return ret; + xt_entry_foreach(iter, entry0, newinfo->size) { + ret = check_entry_size_and_hooks(iter, newinfo, entry0, + entry0 + repl->size, repl->hook_entry, repl->underflow, + repl->valid_hooks); + if (ret != 0) + return ret; + ++i; + } - if (i != number) { + if (i != repl->num_entries) { duprintf("translate_table: %u not %u entries\n", - i, number); + i, repl->num_entries); return -EINVAL; } /* Check hooks all assigned */ for (i = 0; i < NF_INET_NUMHOOKS; i++) { /* Only hooks which are valid */ - if (!(valid_hooks & (1 << i))) + if (!(repl->valid_hooks & (1 << i))) continue; if (newinfo->hook_entry[i] == 0xFFFFFFFF) { duprintf("Invalid hook entry %u %u\n", - i, hook_entries[i]); + i, repl->hook_entry[i]); return -EINVAL; } if (newinfo->underflow[i] == 0xFFFFFFFF) { duprintf("Invalid underflow %u %u\n", - i, underflows[i]); + i, repl->underflow[i]); return -EINVAL; } } - if (!mark_source_chains(newinfo, valid_hooks, entry0)) + if (!mark_source_chains(newinfo, repl->valid_hooks, entry0)) return -ELOOP; /* Finally, each sanity check must pass */ i = 0; - ret = IP6T_ENTRY_ITERATE(entry0, newinfo->size, - find_check_entry, net, name, size, &i); + xt_entry_foreach(iter, entry0, newinfo->size) { + ret = find_check_entry(iter, net, repl->name, repl->size); + if (ret != 0) + break; + ++i; + } if (ret != 0) { - IP6T_ENTRY_ITERATE(entry0, newinfo->size, - cleanup_entry, net, &i); + xt_entry_foreach(iter, entry0, newinfo->size) { + if (i-- == 0) + break; + cleanup_entry(iter, net); + } return ret; } @@ -927,33 +926,11 @@ translate_table(struct net *net, return ret; } -/* Gets counters. */ -static inline int -add_entry_to_counter(const struct ip6t_entry *e, - struct xt_counters total[], - unsigned int *i) -{ - ADD_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt); - - (*i)++; - return 0; -} - -static inline int -set_entry_to_counter(const struct ip6t_entry *e, - struct ip6t_counters total[], - unsigned int *i) -{ - SET_COUNTER(total[*i], e->counters.bcnt, e->counters.pcnt); - - (*i)++; - return 0; -} - static void get_counters(const struct xt_table_info *t, struct xt_counters counters[]) { + struct ip6t_entry *iter; unsigned int cpu; unsigned int i; unsigned int curcpu; @@ -969,22 +946,22 @@ get_counters(const struct xt_table_info *t, curcpu = smp_processor_id(); i = 0; - IP6T_ENTRY_ITERATE(t->entries[curcpu], - t->size, - set_entry_to_counter, - counters, - &i); + xt_entry_foreach(iter, t->entries[curcpu], t->size) { + SET_COUNTER(counters[i], iter->counters.bcnt, + iter->counters.pcnt); + ++i; + } for_each_possible_cpu(cpu) { if (cpu == curcpu) continue; i = 0; xt_info_wrlock(cpu); - IP6T_ENTRY_ITERATE(t->entries[cpu], - t->size, - add_entry_to_counter, - counters, - &i); + xt_entry_foreach(iter, t->entries[cpu], t->size) { + ADD_COUNTER(counters[i], iter->counters.bcnt, + iter->counters.pcnt); + ++i; + } xt_info_wrunlock(cpu); } local_bh_enable(); @@ -1103,24 +1080,19 @@ static int compat_standard_to_user(void __user *dst, const void *src) return copy_to_user(dst, &cv, sizeof(cv)) ? -EFAULT : 0; } -static inline int -compat_calc_match(const struct ip6t_entry_match *m, int *size) -{ - *size += xt_compat_match_offset(m->u.kernel.match); - return 0; -} - static int compat_calc_entry(const struct ip6t_entry *e, const struct xt_table_info *info, const void *base, struct xt_table_info *newinfo) { + const struct xt_entry_match *ematch; const struct ip6t_entry_target *t; unsigned int entry_offset; int off, i, ret; off = sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); entry_offset = (void *)e - base; - IP6T_MATCH_ITERATE(e, compat_calc_match, &off); + xt_ematch_foreach(ematch, e) + off += xt_compat_match_offset(ematch->u.kernel.match); t = ip6t_get_target_c(e); off += xt_compat_target_offset(t->u.kernel.target); newinfo->size -= off; @@ -1142,7 +1114,9 @@ static int compat_calc_entry(const struct ip6t_entry *e, static int compat_table_info(const struct xt_table_info *info, struct xt_table_info *newinfo) { + struct ip6t_entry *iter; void *loc_cpu_entry; + int ret; if (!newinfo || !info) return -EINVAL; @@ -1151,9 +1125,12 @@ static int compat_table_info(const struct xt_table_info *info, memcpy(newinfo, info, offsetof(struct xt_table_info, entries)); newinfo->initial_entries = 0; loc_cpu_entry = info->entries[raw_smp_processor_id()]; - return IP6T_ENTRY_ITERATE(loc_cpu_entry, info->size, - compat_calc_entry, info, loc_cpu_entry, - newinfo); + xt_entry_foreach(iter, loc_cpu_entry, info->size) { + ret = compat_calc_entry(iter, info, loc_cpu_entry, newinfo); + if (ret != 0) + return ret; + } + return 0; } #endif @@ -1267,6 +1244,7 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks, struct xt_table_info *oldinfo; struct xt_counters *counters; const void *loc_cpu_old_entry; + struct ip6t_entry *iter; ret = 0; counters = vmalloc_node(num_counters * sizeof(struct xt_counters), @@ -1310,8 +1288,9 @@ __do_replace(struct net *net, const char *name, unsigned int valid_hooks, /* Decrease module usage counts and free resource */ loc_cpu_old_entry = oldinfo->entries[raw_smp_processor_id()]; - IP6T_ENTRY_ITERATE(loc_cpu_old_entry, oldinfo->size, cleanup_entry, - net, NULL); + xt_entry_foreach(iter, loc_cpu_old_entry, oldinfo->size) + cleanup_entry(iter, net); + xt_free_table_info(oldinfo); if (copy_to_user(counters_ptr, counters, sizeof(struct xt_counters) * num_counters) != 0) @@ -1336,6 +1315,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len) struct ip6t_replace tmp; struct xt_table_info *newinfo; void *loc_cpu_entry; + struct ip6t_entry *iter; if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) return -EFAULT; @@ -1356,9 +1336,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len) goto free_newinfo; } - ret = translate_table(net, tmp.name, tmp.valid_hooks, - newinfo, loc_cpu_entry, tmp.size, tmp.num_entries, - tmp.hook_entry, tmp.underflow); + ret = translate_table(net, newinfo, loc_cpu_entry, &tmp); if (ret != 0) goto free_newinfo; @@ -1371,25 +1349,13 @@ do_replace(struct net *net, const void __user *user, unsigned int len) return 0; free_newinfo_untrans: - IP6T_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry, net, NULL); + xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) + cleanup_entry(iter, net); free_newinfo: xt_free_table_info(newinfo); return ret; } -/* We're lazy, and add to the first CPU; overflow works its fey magic - * and everything is OK. */ -static int -add_counter_to_entry(struct ip6t_entry *e, - const struct xt_counters addme[], - unsigned int *i) -{ - ADD_COUNTER(e->counters, addme[*i].bcnt, addme[*i].pcnt); - - (*i)++; - return 0; -} - static int do_add_counters(struct net *net, const void __user *user, unsigned int len, int compat) @@ -1405,6 +1371,7 @@ do_add_counters(struct net *net, const void __user *user, unsigned int len, const struct xt_table_info *private; int ret = 0; const void *loc_cpu_entry; + struct ip6t_entry *iter; #ifdef CONFIG_COMPAT struct compat_xt_counters_info compat_tmp; @@ -1463,11 +1430,10 @@ do_add_counters(struct net *net, const void __user *user, unsigned int len, curcpu = smp_processor_id(); xt_info_wrlock(curcpu); loc_cpu_entry = private->entries[curcpu]; - IP6T_ENTRY_ITERATE(loc_cpu_entry, - private->size, - add_counter_to_entry, - paddc, - &i); + xt_entry_foreach(iter, loc_cpu_entry, private->size) { + ADD_COUNTER(iter->counters, paddc[i].bcnt, paddc[i].pcnt); + ++i; + } xt_info_wrunlock(curcpu); unlock_up_free: @@ -1496,45 +1462,40 @@ struct compat_ip6t_replace { static int compat_copy_entry_to_user(struct ip6t_entry *e, void __user **dstptr, unsigned int *size, struct xt_counters *counters, - unsigned int *i) + unsigned int i) { struct ip6t_entry_target *t; struct compat_ip6t_entry __user *ce; u_int16_t target_offset, next_offset; compat_uint_t origsize; - int ret; + const struct xt_entry_match *ematch; + int ret = 0; - ret = -EFAULT; origsize = *size; ce = (struct compat_ip6t_entry __user *)*dstptr; - if (copy_to_user(ce, e, sizeof(struct ip6t_entry))) - goto out; - - if (copy_to_user(&ce->counters, &counters[*i], sizeof(counters[*i]))) - goto out; + if (copy_to_user(ce, e, sizeof(struct ip6t_entry)) != 0 || + copy_to_user(&ce->counters, &counters[i], + sizeof(counters[i])) != 0) + return -EFAULT; *dstptr += sizeof(struct compat_ip6t_entry); *size -= sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); - ret = IP6T_MATCH_ITERATE(e, xt_compat_match_to_user, dstptr, size); + xt_ematch_foreach(ematch, e) { + ret = xt_compat_match_to_user(ematch, dstptr, size); + if (ret != 0) + return ret; + } target_offset = e->target_offset - (origsize - *size); - if (ret) - goto out; t = ip6t_get_target(e); ret = xt_compat_target_to_user(t, dstptr, size); if (ret) - goto out; - ret = -EFAULT; + return ret; next_offset = e->next_offset - (origsize - *size); - if (put_user(target_offset, &ce->target_offset)) - goto out; - if (put_user(next_offset, &ce->next_offset)) - goto out; - - (*i)++; + if (put_user(target_offset, &ce->target_offset) != 0 || + put_user(next_offset, &ce->next_offset) != 0) + return -EFAULT; return 0; -out: - return ret; } static int @@ -1542,7 +1503,7 @@ compat_find_calc_match(struct ip6t_entry_match *m, const char *name, const struct ip6t_ip6 *ipv6, unsigned int hookmask, - int *size, unsigned int *i) + int *size) { struct xt_match *match; @@ -1556,34 +1517,19 @@ compat_find_calc_match(struct ip6t_entry_match *m, } m->u.kernel.match = match; *size += xt_compat_match_offset(match); - - (*i)++; - return 0; -} - -static int -compat_release_match(struct ip6t_entry_match *m, unsigned int *i) -{ - if (i && (*i)-- == 0) - return 1; - - module_put(m->u.kernel.match->me); return 0; } -static int -compat_release_entry(struct compat_ip6t_entry *e, unsigned int *i) +static void compat_release_entry(struct compat_ip6t_entry *e) { struct ip6t_entry_target *t; - - if (i && (*i)-- == 0) - return 1; + struct xt_entry_match *ematch; /* Cleanup all matches */ - COMPAT_IP6T_MATCH_ITERATE(e, compat_release_match, NULL); + xt_ematch_foreach(ematch, e) + module_put(ematch->u.kernel.match->me); t = compat_ip6t_get_target(e); module_put(t->u.kernel.target->me); - return 0; } static int @@ -1594,9 +1540,9 @@ check_compat_entry_size_and_hooks(struct compat_ip6t_entry *e, const unsigned char *limit, const unsigned int *hook_entries, const unsigned int *underflows, - unsigned int *i, const char *name) { + struct xt_entry_match *ematch; struct ip6t_entry_target *t; struct xt_target *target; unsigned int entry_offset; @@ -1625,10 +1571,13 @@ check_compat_entry_size_and_hooks(struct compat_ip6t_entry *e, off = sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); entry_offset = (void *)e - (void *)base; j = 0; - ret = COMPAT_IP6T_MATCH_ITERATE(e, compat_find_calc_match, name, - &e->ipv6, e->comefrom, &off, &j); - if (ret != 0) - goto release_matches; + xt_ematch_foreach(ematch, e) { + ret = compat_find_calc_match(ematch, name, + &e->ipv6, e->comefrom, &off); + if (ret != 0) + goto release_matches; + ++j; + } t = compat_ip6t_get_target(e); target = try_then_request_module(xt_find_target(AF_INET6, @@ -1660,14 +1609,16 @@ check_compat_entry_size_and_hooks(struct compat_ip6t_entry *e, /* Clear counters and comefrom */ memset(&e->counters, 0, sizeof(e->counters)); e->comefrom = 0; - - (*i)++; return 0; out: module_put(t->u.kernel.target->me); release_matches: - IP6T_MATCH_ITERATE(e, compat_release_match, &j); + xt_ematch_foreach(ematch, e) { + if (j-- == 0) + break; + module_put(ematch->u.kernel.match->me); + } return ret; } @@ -1681,6 +1632,7 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr, struct ip6t_entry *de; unsigned int origsize; int ret, h; + struct xt_entry_match *ematch; ret = 0; origsize = *size; @@ -1691,10 +1643,11 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr, *dstptr += sizeof(struct ip6t_entry); *size += sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry); - ret = COMPAT_IP6T_MATCH_ITERATE(e, xt_compat_match_from_user, - dstptr, size); - if (ret) - return ret; + xt_ematch_foreach(ematch, e) { + ret = xt_compat_match_from_user(ematch, dstptr, size); + if (ret != 0) + return ret; + } de->target_offset = e->target_offset - (origsize - *size); t = compat_ip6t_get_target(e); target = t->u.kernel.target; @@ -1711,11 +1664,12 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr, } static int compat_check_entry(struct ip6t_entry *e, struct net *net, - const char *name, unsigned int *i) + const char *name) { unsigned int j; - int ret; + int ret = 0; struct xt_mtchk_param mtpar; + struct xt_entry_match *ematch; j = 0; mtpar.net = net; @@ -1723,19 +1677,24 @@ static int compat_check_entry(struct ip6t_entry *e, struct net *net, mtpar.entryinfo = &e->ipv6; mtpar.hook_mask = e->comefrom; mtpar.family = NFPROTO_IPV6; - ret = IP6T_MATCH_ITERATE(e, check_match, &mtpar, &j); - if (ret) - goto cleanup_matches; + xt_ematch_foreach(ematch, e) { + ret = check_match(ematch, &mtpar); + if (ret != 0) + goto cleanup_matches; + ++j; + } ret = check_target(e, net, name); if (ret) goto cleanup_matches; - - (*i)++; return 0; cleanup_matches: - IP6T_MATCH_ITERATE(e, cleanup_match, net, &j); + xt_ematch_foreach(ematch, e) { + if (j-- == 0) + break; + cleanup_match(ematch, net); + } return ret; } @@ -1753,8 +1712,10 @@ translate_compat_table(struct net *net, unsigned int i, j; struct xt_table_info *newinfo, *info; void *pos, *entry0, *entry1; + struct compat_ip6t_entry *iter0; + struct ip6t_entry *iter1; unsigned int size; - int ret; + int ret = 0; info = *pinfo; entry0 = *pentry0; @@ -1771,13 +1732,14 @@ translate_compat_table(struct net *net, j = 0; xt_compat_lock(AF_INET6); /* Walk through entries, checking offsets. */ - ret = COMPAT_IP6T_ENTRY_ITERATE(entry0, total_size, - check_compat_entry_size_and_hooks, - info, &size, entry0, - entry0 + total_size, - hook_entries, underflows, &j, name); - if (ret != 0) - goto out_unlock; + xt_entry_foreach(iter0, entry0, total_size) { + ret = check_compat_entry_size_and_hooks(iter0, info, &size, + entry0, entry0 + total_size, hook_entries, underflows, + name); + if (ret != 0) + goto out_unlock; + ++j; + } ret = -EINVAL; if (j != number) { @@ -1816,9 +1778,12 @@ translate_compat_table(struct net *net, entry1 = newinfo->entries[raw_smp_processor_id()]; pos = entry1; size = total_size; - ret = COMPAT_IP6T_ENTRY_ITERATE(entry0, total_size, - compat_copy_entry_from_user, - &pos, &size, name, newinfo, entry1); + xt_entry_foreach(iter0, entry0, total_size) { + ret = compat_copy_entry_from_user(iter0, &pos, + &size, name, newinfo, entry1); + if (ret != 0) + break; + } xt_compat_flush_offsets(AF_INET6); xt_compat_unlock(AF_INET6); if (ret) @@ -1829,13 +1794,32 @@ translate_compat_table(struct net *net, goto free_newinfo; i = 0; - ret = IP6T_ENTRY_ITERATE(entry1, newinfo->size, compat_check_entry, - net, name, &i); + xt_entry_foreach(iter1, entry1, newinfo->size) { + ret = compat_check_entry(iter1, net, name); + if (ret != 0) + break; + ++i; + } if (ret) { + /* + * The first i matches need cleanup_entry (calls ->destroy) + * because they had called ->check already. The other j-i + * entries need only release. + */ + int skip = i; j -= i; - COMPAT_IP6T_ENTRY_ITERATE_CONTINUE(entry0, newinfo->size, i, - compat_release_entry, &j); - IP6T_ENTRY_ITERATE(entry1, newinfo->size, cleanup_entry, net, &i); + xt_entry_foreach(iter0, entry0, newinfo->size) { + if (skip-- > 0) + continue; + if (j-- == 0) + break; + compat_release_entry(iter0); + } + xt_entry_foreach(iter1, entry1, newinfo->size) { + if (i-- == 0) + break; + cleanup_entry(iter1, net); + } xt_free_table_info(newinfo); return ret; } @@ -1853,7 +1837,11 @@ translate_compat_table(struct net *net, free_newinfo: xt_free_table_info(newinfo); out: - COMPAT_IP6T_ENTRY_ITERATE(entry0, total_size, compat_release_entry, &j); + xt_entry_foreach(iter0, entry0, total_size) { + if (j-- == 0) + break; + compat_release_entry(iter0); + } return ret; out_unlock: xt_compat_flush_offsets(AF_INET6); @@ -1868,6 +1856,7 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len) struct compat_ip6t_replace tmp; struct xt_table_info *newinfo; void *loc_cpu_entry; + struct ip6t_entry *iter; if (copy_from_user(&tmp, user, sizeof(tmp)) != 0) return -EFAULT; @@ -1906,7 +1895,8 @@ compat_do_replace(struct net *net, void __user *user, unsigned int len) return 0; free_newinfo_untrans: - IP6T_ENTRY_ITERATE(loc_cpu_entry, newinfo->size, cleanup_entry, net, NULL); + xt_entry_foreach(iter, loc_cpu_entry, newinfo->size) + cleanup_entry(iter, net); free_newinfo: xt_free_table_info(newinfo); return ret; @@ -1955,6 +1945,7 @@ compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table, int ret = 0; const void *loc_cpu_entry; unsigned int i = 0; + struct ip6t_entry *iter; counters = alloc_counters(table); if (IS_ERR(counters)) @@ -1967,9 +1958,12 @@ compat_copy_entries_to_user(unsigned int total_size, struct xt_table *table, loc_cpu_entry = private->entries[raw_smp_processor_id()]; pos = userptr; size = total_size; - ret = IP6T_ENTRY_ITERATE(loc_cpu_entry, total_size, - compat_copy_entry_to_user, - &pos, &size, counters, &i); + xt_entry_foreach(iter, loc_cpu_entry, total_size) { + ret = compat_copy_entry_to_user(iter, &pos, + &size, counters, i++); + if (ret != 0) + break; + } vfree(counters); return ret; @@ -2143,11 +2137,7 @@ struct xt_table *ip6t_register_table(struct net *net, loc_cpu_entry = newinfo->entries[raw_smp_processor_id()]; memcpy(loc_cpu_entry, repl->entries, repl->size); - ret = translate_table(net, table->name, table->valid_hooks, - newinfo, loc_cpu_entry, repl->size, - repl->num_entries, - repl->hook_entry, - repl->underflow); + ret = translate_table(net, newinfo, loc_cpu_entry, repl); if (ret != 0) goto out_free; @@ -2169,12 +2159,14 @@ void ip6t_unregister_table(struct net *net, struct xt_table *table) struct xt_table_info *private; void *loc_cpu_entry; struct module *table_owner = table->me; + struct ip6t_entry *iter; private = xt_unregister_table(table); /* Decrease module usage counts and free resources */ loc_cpu_entry = private->entries[raw_smp_processor_id()]; - IP6T_ENTRY_ITERATE(loc_cpu_entry, private->size, cleanup_entry, net, NULL); + xt_entry_foreach(iter, loc_cpu_entry, private->size) + cleanup_entry(iter, net); if (private->number > private->initial_entries) module_put(table_owner); xt_free_table_info(private); diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c index ad1fcda6898..f1171b74465 100644 --- a/net/ipv6/netfilter/nf_conntrack_reasm.c +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c @@ -469,7 +469,7 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev) /* all original skbs are linked into the NFCT_FRAG6_CB(head).orig */ fp = skb_shinfo(head)->frag_list; - if (NFCT_FRAG6_CB(fp)->orig == NULL) + if (fp && NFCT_FRAG6_CB(fp)->orig == NULL) /* at above code, head skb is divided into two skbs. */ fp = fp->next; @@ -595,12 +595,6 @@ struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb, u32 user) hdr = ipv6_hdr(clone); fhdr = (struct frag_hdr *)skb_transport_header(clone); - if (!(fhdr->frag_off & htons(0xFFF9))) { - pr_debug("Invalid fragment offset\n"); - /* It is not a fragmented frame */ - goto ret_orig; - } - if (atomic_read(&nf_init_frags.mem) > nf_init_frags.high_thresh) nf_ct_frag6_evictor(); diff --git a/net/netfilter/xt_TCPMSS.c b/net/netfilter/xt_TCPMSS.c index 6f21b4377db..0e357ac9a2a 100644 --- a/net/netfilter/xt_TCPMSS.c +++ b/net/netfilter/xt_TCPMSS.c @@ -239,6 +239,7 @@ static bool tcpmss_tg4_check(const struct xt_tgchk_param *par) { const struct xt_tcpmss_info *info = par->targinfo; const struct ipt_entry *e = par->entryinfo; + const struct xt_entry_match *ematch; if (info->mss == XT_TCPMSS_CLAMP_PMTU && (par->hook_mask & ~((1 << NF_INET_FORWARD) | @@ -248,8 +249,9 @@ static bool tcpmss_tg4_check(const struct xt_tgchk_param *par) "FORWARD, OUTPUT and POSTROUTING hooks\n"); return false; } - if (IPT_MATCH_ITERATE(e, find_syn_match)) - return true; + xt_ematch_foreach(ematch, e) + if (find_syn_match(ematch)) + return true; printk("xt_TCPMSS: Only works on TCP SYN packets\n"); return false; } @@ -259,6 +261,7 @@ static bool tcpmss_tg6_check(const struct xt_tgchk_param *par) { const struct xt_tcpmss_info *info = par->targinfo; const struct ip6t_entry *e = par->entryinfo; + const struct xt_entry_match *ematch; if (info->mss == XT_TCPMSS_CLAMP_PMTU && (par->hook_mask & ~((1 << NF_INET_FORWARD) | @@ -268,8 +271,9 @@ static bool tcpmss_tg6_check(const struct xt_tgchk_param *par) "FORWARD, OUTPUT and POSTROUTING hooks\n"); return false; } - if (IP6T_MATCH_ITERATE(e, find_syn_match)) - return true; + xt_ematch_foreach(ematch, e) + if (find_syn_match(ematch)) + return true; printk("xt_TCPMSS: Only works on TCP SYN packets\n"); return false; } diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c index 132cfaa84cd..7073dbb8100 100644 --- a/net/netfilter/xt_recent.c +++ b/net/netfilter/xt_recent.c @@ -177,10 +177,10 @@ recent_entry_init(struct recent_table *t, const union nf_inet_addr *addr, static void recent_entry_update(struct recent_table *t, struct recent_entry *e) { + e->index %= ip_pkt_list_tot; e->stamps[e->index++] = jiffies; if (e->index > e->nstamps) e->nstamps = e->index; - e->index %= ip_pkt_list_tot; list_move_tail(&e->lru_list, &t->lru_list); } @@ -267,7 +267,7 @@ recent_mt(const struct sk_buff *skb, const struct xt_match_param *par) for (i = 0; i < e->nstamps; i++) { if (info->seconds && time_after(time, e->stamps[i])) continue; - if (++hits >= info->hit_count) { + if (info->hit_count && ++hits >= info->hit_count) { ret = !ret; break; } |