diff options
Diffstat (limited to 'net/netfilter/ipset/ip_set_list_set.c')
-rw-r--r-- | net/netfilter/ipset/ip_set_list_set.c | 274 |
1 files changed, 109 insertions, 165 deletions
diff --git a/net/netfilter/ipset/ip_set_list_set.c b/net/netfilter/ipset/ip_set_list_set.c index 979b8c9..3e2317f 100644 --- a/net/netfilter/ipset/ip_set_list_set.c +++ b/net/netfilter/ipset/ip_set_list_set.c @@ -15,12 +15,13 @@ #include <linux/netfilter/ipset/ip_set.h> #include <linux/netfilter/ipset/ip_set_list.h> -#define REVISION_MIN 0 -#define REVISION_MAX 1 /* Counters support added */ +#define IPSET_TYPE_REV_MIN 0 +/* 1 Counters support added */ +#define IPSET_TYPE_REV_MAX 2 /* Comments support added */ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>"); -IP_SET_MODULE_DESC("list:set", REVISION_MIN, REVISION_MAX); +IP_SET_MODULE_DESC("list:set", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX); MODULE_ALIAS("ip_set_list:set"); /* Member elements */ @@ -28,28 +29,6 @@ struct set_elem { ip_set_id_t id; }; -struct sett_elem { - struct { - ip_set_id_t id; - } __attribute__ ((aligned)); - unsigned long timeout; -}; - -struct setc_elem { - struct { - ip_set_id_t id; - } __attribute__ ((aligned)); - struct ip_set_counter counter; -}; - -struct setct_elem { - struct { - ip_set_id_t id; - } __attribute__ ((aligned)); - struct ip_set_counter counter; - unsigned long timeout; -}; - struct set_adt_elem { ip_set_id_t id; ip_set_id_t refid; @@ -58,24 +37,14 @@ struct set_adt_elem { /* Type structure */ struct list_set { - size_t dsize; /* element size */ - size_t offset[IPSET_OFFSET_MAX]; /* Offsets to extensions */ u32 size; /* size of set list array */ - u32 timeout; /* timeout value */ struct timer_list gc; /* garbage collection */ + struct net *net; /* namespace */ struct set_elem members[0]; /* the set members */ }; -static inline struct set_elem * -list_set_elem(const struct list_set *map, u32 id) -{ - return (struct set_elem *)((void *)map->members + id * map->dsize); -} - -#define ext_timeout(e, m) \ -(unsigned long *)((void *)(e) + (m)->offset[IPSET_OFFSET_TIMEOUT]) -#define ext_counter(e, m) \ -(struct ip_set_counter *)((void *)(e) + (m)->offset[IPSET_OFFSET_COUNTER]) +#define list_set_elem(set, map, id) \ + (struct set_elem *)((void *)(map)->members + (id) * (set)->dsize) static int list_set_ktest(struct ip_set *set, const struct sk_buff *skb, @@ -92,16 +61,16 @@ list_set_ktest(struct ip_set *set, const struct sk_buff *skb, if (opt->cmdflags & IPSET_FLAG_SKIP_SUBCOUNTER_UPDATE) opt->cmdflags &= ~IPSET_FLAG_SKIP_COUNTER_UPDATE; for (i = 0; i < map->size; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); if (e->id == IPSET_INVALID_ID) return 0; if (SET_WITH_TIMEOUT(set) && - ip_set_timeout_expired(ext_timeout(e, map))) + ip_set_timeout_expired(ext_timeout(e, set))) continue; ret = ip_set_test(e->id, skb, par, opt); if (ret > 0) { if (SET_WITH_COUNTER(set)) - ip_set_update_counter(ext_counter(e, map), + ip_set_update_counter(ext_counter(e, set), ext, &opt->ext, cmdflags); return ret; @@ -121,11 +90,11 @@ list_set_kadd(struct ip_set *set, const struct sk_buff *skb, int ret; for (i = 0; i < map->size; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); if (e->id == IPSET_INVALID_ID) return 0; if (SET_WITH_TIMEOUT(set) && - ip_set_timeout_expired(ext_timeout(e, map))) + ip_set_timeout_expired(ext_timeout(e, set))) continue; ret = ip_set_add(e->id, skb, par, opt); if (ret == 0) @@ -145,11 +114,11 @@ list_set_kdel(struct ip_set *set, const struct sk_buff *skb, int ret; for (i = 0; i < map->size; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); if (e->id == IPSET_INVALID_ID) return 0; if (SET_WITH_TIMEOUT(set) && - ip_set_timeout_expired(ext_timeout(e, map))) + ip_set_timeout_expired(ext_timeout(e, set))) continue; ret = ip_set_del(e->id, skb, par, opt); if (ret == 0) @@ -163,8 +132,7 @@ list_set_kadt(struct ip_set *set, const struct sk_buff *skb, const struct xt_action_param *par, enum ipset_adt adt, struct ip_set_adt_opt *opt) { - struct list_set *map = set->data; - struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, map); + struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set); switch (adt) { case IPSET_TEST: @@ -188,10 +156,10 @@ id_eq(const struct ip_set *set, u32 i, ip_set_id_t id) if (i >= map->size) return 0; - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); return !!(e->id == id && !(SET_WITH_TIMEOUT(set) && - ip_set_timeout_expired(ext_timeout(e, map)))); + ip_set_timeout_expired(ext_timeout(e, set)))); } static int @@ -199,28 +167,36 @@ list_set_add(struct ip_set *set, u32 i, struct set_adt_elem *d, const struct ip_set_ext *ext) { struct list_set *map = set->data; - struct set_elem *e = list_set_elem(map, i); + struct set_elem *e = list_set_elem(set, map, i); if (e->id != IPSET_INVALID_ID) { - if (i == map->size - 1) + if (i == map->size - 1) { /* Last element replaced: e.g. add new,before,last */ - ip_set_put_byindex(e->id); - else { - struct set_elem *x = list_set_elem(map, map->size - 1); + ip_set_put_byindex(map->net, e->id); + ip_set_ext_destroy(set, e); + } else { + struct set_elem *x = list_set_elem(set, map, + map->size - 1); /* Last element pushed off */ - if (x->id != IPSET_INVALID_ID) - ip_set_put_byindex(x->id); - memmove(list_set_elem(map, i + 1), e, - map->dsize * (map->size - (i + 1))); + if (x->id != IPSET_INVALID_ID) { + ip_set_put_byindex(map->net, x->id); + ip_set_ext_destroy(set, x); + } + memmove(list_set_elem(set, map, i + 1), e, + set->dsize * (map->size - (i + 1))); + /* Extensions must be initialized to zero */ + memset(e, 0, set->dsize); } } e->id = d->id; if (SET_WITH_TIMEOUT(set)) - ip_set_timeout_set(ext_timeout(e, map), ext->timeout); + ip_set_timeout_set(ext_timeout(e, set), ext->timeout); if (SET_WITH_COUNTER(set)) - ip_set_init_counter(ext_counter(e, map), ext); + ip_set_init_counter(ext_counter(e, set), ext); + if (SET_WITH_COMMENT(set)) + ip_set_init_comment(ext_comment(e, set), ext); return 0; } @@ -228,16 +204,17 @@ static int list_set_del(struct ip_set *set, u32 i) { struct list_set *map = set->data; - struct set_elem *e = list_set_elem(map, i); + struct set_elem *e = list_set_elem(set, map, i); - ip_set_put_byindex(e->id); + ip_set_put_byindex(map->net, e->id); + ip_set_ext_destroy(set, e); if (i < map->size - 1) - memmove(e, list_set_elem(map, i + 1), - map->dsize * (map->size - (i + 1))); + memmove(e, list_set_elem(set, map, i + 1), + set->dsize * (map->size - (i + 1))); /* Last element */ - e = list_set_elem(map, map->size - 1); + e = list_set_elem(set, map, map->size - 1); e->id = IPSET_INVALID_ID; return 0; } @@ -247,13 +224,16 @@ set_cleanup_entries(struct ip_set *set) { struct list_set *map = set->data; struct set_elem *e; - u32 i; + u32 i = 0; - for (i = 0; i < map->size; i++) { - e = list_set_elem(map, i); + while (i < map->size) { + e = list_set_elem(set, map, i); if (e->id != IPSET_INVALID_ID && - ip_set_timeout_expired(ext_timeout(e, map))) + ip_set_timeout_expired(ext_timeout(e, set))) list_set_del(set, i); + /* Check element moved to position i in next loop */ + else + i++; } } @@ -268,11 +248,11 @@ list_set_utest(struct ip_set *set, void *value, const struct ip_set_ext *ext, int ret; for (i = 0; i < map->size; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); if (e->id == IPSET_INVALID_ID) return 0; else if (SET_WITH_TIMEOUT(set) && - ip_set_timeout_expired(ext_timeout(e, map))) + ip_set_timeout_expired(ext_timeout(e, set))) continue; else if (e->id != d->id) continue; @@ -299,14 +279,14 @@ list_set_uadd(struct ip_set *set, void *value, const struct ip_set_ext *ext, bool flag_exist = flags & IPSET_FLAG_EXIST; u32 i, ret = 0; + if (SET_WITH_TIMEOUT(set)) + set_cleanup_entries(set); + /* Check already added element */ for (i = 0; i < map->size; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); if (e->id == IPSET_INVALID_ID) goto insert; - else if (SET_WITH_TIMEOUT(set) && - ip_set_timeout_expired(ext_timeout(e, map))) - continue; else if (e->id != d->id) continue; @@ -319,18 +299,22 @@ list_set_uadd(struct ip_set *set, void *value, const struct ip_set_ext *ext, /* Can't re-add */ return -IPSET_ERR_EXIST; /* Update extensions */ + ip_set_ext_destroy(set, e); + if (SET_WITH_TIMEOUT(set)) - ip_set_timeout_set(ext_timeout(e, map), ext->timeout); + ip_set_timeout_set(ext_timeout(e, set), ext->timeout); if (SET_WITH_COUNTER(set)) - ip_set_init_counter(ext_counter(e, map), ext); + ip_set_init_counter(ext_counter(e, set), ext); + if (SET_WITH_COMMENT(set)) + ip_set_init_comment(ext_comment(e, set), ext); /* Set is already added to the list */ - ip_set_put_byindex(d->id); + ip_set_put_byindex(map->net, d->id); return 0; } insert: ret = -IPSET_ERR_LIST_FULL; for (i = 0; i < map->size && ret == -IPSET_ERR_LIST_FULL; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); if (e->id == IPSET_INVALID_ID) ret = d->before != 0 ? -IPSET_ERR_REF_EXIST : list_set_add(set, i, d, ext); @@ -355,12 +339,12 @@ list_set_udel(struct ip_set *set, void *value, const struct ip_set_ext *ext, u32 i; for (i = 0; i < map->size; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); if (e->id == IPSET_INVALID_ID) return d->before != 0 ? -IPSET_ERR_REF_EXIST : -IPSET_ERR_EXIST; else if (SET_WITH_TIMEOUT(set) && - ip_set_timeout_expired(ext_timeout(e, map))) + ip_set_timeout_expired(ext_timeout(e, set))) continue; else if (e->id != d->id) continue; @@ -386,7 +370,7 @@ list_set_uadt(struct ip_set *set, struct nlattr *tb[], struct list_set *map = set->data; ipset_adtfn adtfn = set->variant->adt[adt]; struct set_adt_elem e = { .refid = IPSET_INVALID_ID }; - struct ip_set_ext ext = IP_SET_INIT_UEXT(map); + struct ip_set_ext ext = IP_SET_INIT_UEXT(set); struct ip_set *s; int ret = 0; @@ -403,7 +387,7 @@ list_set_uadt(struct ip_set *set, struct nlattr *tb[], ret = ip_set_get_extensions(set, tb, &ext); if (ret) return ret; - e.id = ip_set_get_byname(nla_data(tb[IPSET_ATTR_NAME]), &s); + e.id = ip_set_get_byname(map->net, nla_data(tb[IPSET_ATTR_NAME]), &s); if (e.id == IPSET_INVALID_ID) return -IPSET_ERR_NAME; /* "Loop detection" */ @@ -423,7 +407,8 @@ list_set_uadt(struct ip_set *set, struct nlattr *tb[], } if (tb[IPSET_ATTR_NAMEREF]) { - e.refid = ip_set_get_byname(nla_data(tb[IPSET_ATTR_NAMEREF]), + e.refid = ip_set_get_byname(map->net, + nla_data(tb[IPSET_ATTR_NAMEREF]), &s); if (e.refid == IPSET_INVALID_ID) { ret = -IPSET_ERR_NAMEREF; @@ -439,9 +424,9 @@ list_set_uadt(struct ip_set *set, struct nlattr *tb[], finish: if (e.refid != IPSET_INVALID_ID) - ip_set_put_byindex(e.refid); + ip_set_put_byindex(map->net, e.refid); if (adt != IPSET_ADD || ret) - ip_set_put_byindex(e.id); + ip_set_put_byindex(map->net, e.id); return ip_set_eexist(ret, flags) ? 0 : ret; } @@ -454,9 +439,10 @@ list_set_flush(struct ip_set *set) u32 i; for (i = 0; i < map->size; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); if (e->id != IPSET_INVALID_ID) { - ip_set_put_byindex(e->id); + ip_set_put_byindex(map->net, e->id); + ip_set_ext_destroy(set, e); e->id = IPSET_INVALID_ID; } } @@ -485,14 +471,11 @@ list_set_head(struct ip_set *set, struct sk_buff *skb) if (!nested) goto nla_put_failure; if (nla_put_net32(skb, IPSET_ATTR_SIZE, htonl(map->size)) || - (SET_WITH_TIMEOUT(set) && - nla_put_net32(skb, IPSET_ATTR_TIMEOUT, htonl(map->timeout))) || - (SET_WITH_COUNTER(set) && - nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, - htonl(IPSET_FLAG_WITH_COUNTERS))) || nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref - 1)) || nla_put_net32(skb, IPSET_ATTR_MEMSIZE, - htonl(sizeof(*map) + map->size * map->dsize))) + htonl(sizeof(*map) + map->size * set->dsize))) + goto nla_put_failure; + if (unlikely(ip_set_put_flags(skb, set))) goto nla_put_failure; ipset_nest_end(skb, nested); @@ -507,19 +490,20 @@ list_set_list(const struct ip_set *set, { const struct list_set *map = set->data; struct nlattr *atd, *nested; - u32 i, first = cb->args[2]; + u32 i, first = cb->args[IPSET_CB_ARG0]; const struct set_elem *e; atd = ipset_nest_start(skb, IPSET_ATTR_ADT); if (!atd) return -EMSGSIZE; - for (; cb->args[2] < map->size; cb->args[2]++) { - i = cb->args[2]; - e = list_set_elem(map, i); + for (; cb->args[IPSET_CB_ARG0] < map->size; + cb->args[IPSET_CB_ARG0]++) { + i = cb->args[IPSET_CB_ARG0]; + e = list_set_elem(set, map, i); if (e->id == IPSET_INVALID_ID) goto finish; if (SET_WITH_TIMEOUT(set) && - ip_set_timeout_expired(ext_timeout(e, map))) + ip_set_timeout_expired(ext_timeout(e, set))) continue; nested = ipset_nest_start(skb, IPSET_ATTR_DATA); if (!nested) { @@ -530,31 +514,25 @@ list_set_list(const struct ip_set *set, goto nla_put_failure; } if (nla_put_string(skb, IPSET_ATTR_NAME, - ip_set_name_byindex(e->id))) - goto nla_put_failure; - if (SET_WITH_TIMEOUT(set) && - nla_put_net32(skb, IPSET_ATTR_TIMEOUT, - htonl(ip_set_timeout_get( - ext_timeout(e, map))))) + ip_set_name_byindex(map->net, e->id))) goto nla_put_failure; - if (SET_WITH_COUNTER(set) && - ip_set_put_counter(skb, ext_counter(e, map))) + if (ip_set_put_extensions(skb, set, e, true)) goto nla_put_failure; ipset_nest_end(skb, nested); } finish: ipset_nest_end(skb, atd); /* Set listing finished */ - cb->args[2] = 0; + cb->args[IPSET_CB_ARG0] = 0; return 0; nla_put_failure: nla_nest_cancel(skb, nested); - ipset_nest_end(skb, atd); if (unlikely(i == first)) { - cb->args[2] = 0; + cb->args[IPSET_CB_ARG0] = 0; return -EMSGSIZE; } + ipset_nest_end(skb, atd); return 0; } @@ -565,7 +543,7 @@ list_set_same_set(const struct ip_set *a, const struct ip_set *b) const struct list_set *y = b->data; return x->size == y->size && - x->timeout == y->timeout && + a->timeout == b->timeout && a->extensions == b->extensions; } @@ -594,7 +572,7 @@ list_set_gc(unsigned long ul_set) set_cleanup_entries(set); write_unlock_bh(&set->lock); - map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ; + map->gc.expires = jiffies + IPSET_GC_PERIOD(set->timeout) * HZ; add_timer(&map->gc); } @@ -606,43 +584,40 @@ list_set_gc_init(struct ip_set *set, void (*gc)(unsigned long ul_set)) init_timer(&map->gc); map->gc.data = (unsigned long) set; map->gc.function = gc; - map->gc.expires = jiffies + IPSET_GC_PERIOD(map->timeout) * HZ; + map->gc.expires = jiffies + IPSET_GC_PERIOD(set->timeout) * HZ; add_timer(&map->gc); } /* Create list:set type of sets */ -static struct list_set * -init_list_set(struct ip_set *set, u32 size, size_t dsize, - unsigned long timeout) +static bool +init_list_set(struct net *net, struct ip_set *set, u32 size) { struct list_set *map; struct set_elem *e; u32 i; - map = kzalloc(sizeof(*map) + size * dsize, GFP_KERNEL); + map = kzalloc(sizeof(*map) + size * set->dsize, GFP_KERNEL); if (!map) - return NULL; + return false; map->size = size; - map->dsize = dsize; - map->timeout = timeout; + map->net = net; set->data = map; for (i = 0; i < size; i++) { - e = list_set_elem(map, i); + e = list_set_elem(set, map, i); e->id = IPSET_INVALID_ID; } - return map; + return true; } static int -list_set_create(struct ip_set *set, struct nlattr *tb[], u32 flags) +list_set_create(struct net *net, struct ip_set *set, struct nlattr *tb[], + u32 flags) { - struct list_set *map; - u32 size = IP_SET_LIST_DEFAULT_SIZE, cadt_flags = 0; - unsigned long timeout = 0; + u32 size = IP_SET_LIST_DEFAULT_SIZE; if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_SIZE) || !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) || @@ -654,45 +629,13 @@ list_set_create(struct ip_set *set, struct nlattr *tb[], u32 flags) if (size < IP_SET_LIST_MIN_SIZE) size = IP_SET_LIST_MIN_SIZE; - if (tb[IPSET_ATTR_CADT_FLAGS]) - cadt_flags = ip_set_get_h32(tb[IPSET_ATTR_CADT_FLAGS]); - if (tb[IPSET_ATTR_TIMEOUT]) - timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); set->variant = &set_variant; - if (cadt_flags & IPSET_FLAG_WITH_COUNTERS) { - set->extensions |= IPSET_EXT_COUNTER; - if (tb[IPSET_ATTR_TIMEOUT]) { - map = init_list_set(set, size, - sizeof(struct setct_elem), timeout); - if (!map) - return -ENOMEM; - set->extensions |= IPSET_EXT_TIMEOUT; - map->offset[IPSET_OFFSET_TIMEOUT] = - offsetof(struct setct_elem, timeout); - map->offset[IPSET_OFFSET_COUNTER] = - offsetof(struct setct_elem, counter); - list_set_gc_init(set, list_set_gc); - } else { - map = init_list_set(set, size, - sizeof(struct setc_elem), 0); - if (!map) - return -ENOMEM; - map->offset[IPSET_OFFSET_COUNTER] = - offsetof(struct setc_elem, counter); - } - } else if (tb[IPSET_ATTR_TIMEOUT]) { - map = init_list_set(set, size, - sizeof(struct sett_elem), timeout); - if (!map) - return -ENOMEM; - set->extensions |= IPSET_EXT_TIMEOUT; - map->offset[IPSET_OFFSET_TIMEOUT] = - offsetof(struct sett_elem, timeout); + set->dsize = ip_set_elem_len(set, tb, sizeof(struct set_elem)); + if (!init_list_set(net, set, size)) + return -ENOMEM; + if (tb[IPSET_ATTR_TIMEOUT]) { + set->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]); list_set_gc_init(set, list_set_gc); - } else { - map = init_list_set(set, size, sizeof(struct set_elem), 0); - if (!map) - return -ENOMEM; } return 0; } @@ -703,8 +646,8 @@ static struct ip_set_type list_set_type __read_mostly = { .features = IPSET_TYPE_NAME | IPSET_DUMP_LAST, .dimension = IPSET_DIM_ONE, .family = NFPROTO_UNSPEC, - .revision_min = REVISION_MIN, - .revision_max = REVISION_MAX, + .revision_min = IPSET_TYPE_REV_MIN, + .revision_max = IPSET_TYPE_REV_MAX, .create = list_set_create, .create_policy = { [IPSET_ATTR_SIZE] = { .type = NLA_U32 }, @@ -721,6 +664,7 @@ static struct ip_set_type list_set_type __read_mostly = { [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 }, [IPSET_ATTR_BYTES] = { .type = NLA_U64 }, [IPSET_ATTR_PACKETS] = { .type = NLA_U64 }, + [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING }, }, .me = THIS_MODULE, }; |