From bac86fe6e7b14dce5f972fcf7913c6747b81953c Mon Sep 17 00:00:00 2001 From: Vitaly Lavrov Date: Sat, 28 Sep 2013 18:41:20 +0200 Subject: ipset: Add net namespace for ipset This patch adds netns support for ipset. Major changes were made in ip_set_core.c and ip_set.h. Global variables are moved to per net namespace. Added initialization code and the destruction of the network namespace ipset subsystem. In the prototypes of public functions ip_set_* added parameter "struct net*". The remaining corrections related to the change prototypes of public functions ip_set_*. The patch for git://git.netfilter.org/ipset.git commit 6a4ec96c0b8caac5c35474e40e319704d92ca347 Signed-off-by: Vitaly Lavrov Signed-off-by: Jozsef Kadlecsik --- kernel/net/netfilter/ipset/ip_set_core.c | 288 ++++++++++++++++++++----------- 1 file changed, 187 insertions(+), 101 deletions(-) (limited to 'kernel/net/netfilter/ipset/ip_set_core.c') diff --git a/kernel/net/netfilter/ipset/ip_set_core.c b/kernel/net/netfilter/ipset/ip_set_core.c index 29ce622..b32817f 100644 --- a/kernel/net/netfilter/ipset/ip_set_core.c +++ b/kernel/net/netfilter/ipset/ip_set_core.c @@ -18,6 +18,8 @@ #include #include #include +#include +#include #include #include @@ -28,8 +30,17 @@ static LIST_HEAD(ip_set_type_list); /* all registered set types */ static DEFINE_MUTEX(ip_set_type_mutex); /* protects ip_set_type_list */ static DEFINE_RWLOCK(ip_set_ref_lock); /* protects the set refs */ -static struct ip_set * __rcu *ip_set_list; /* all individual sets */ -static ip_set_id_t ip_set_max = CONFIG_IP_SET_MAX; /* max number of sets */ +struct ip_set_net { + struct ip_set * __rcu *ip_set_list; /* all individual sets */ + ip_set_id_t ip_set_max; /* max number of sets */ + int is_deleted; /* deleted by ip_set_net_exit */ +}; +static int ip_set_net_id __read_mostly; + +static inline struct ip_set_net *ip_set_pernet(struct net *net) +{ + return net_generic(net, ip_set_net_id); +} #define IP_SET_INC 64 #define STREQ(a, b) (strncmp(a, b, IPSET_MAXNAMELEN) == 0) @@ -51,8 +62,8 @@ MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_IPSET); /* When the nfnl mutex is held: */ #define nfnl_dereference(p) \ rcu_dereference_protected(p, 1) -#define nfnl_set(id) \ - nfnl_dereference(ip_set_list)[id] +#define nfnl_set(inst, id) \ + nfnl_dereference((inst)->ip_set_list)[id] /* * The set types are implemented in modules and registered set types @@ -440,13 +451,14 @@ __ip_set_put(struct ip_set *set) */ static inline struct ip_set * -ip_set_rcu_get(ip_set_id_t index) +ip_set_rcu_get(struct net *net, ip_set_id_t index) { struct ip_set *set; + struct ip_set_net *inst = ip_set_pernet(net); rcu_read_lock(); /* ip_set_list itself needs to be protected */ - set = rcu_dereference(ip_set_list)[index]; + set = rcu_dereference(inst->ip_set_list)[index]; rcu_read_unlock(); return set; @@ -456,7 +468,8 @@ int ip_set_test(ip_set_id_t index, const struct sk_buff *skb, const struct xt_action_param *par, struct ip_set_adt_opt *opt) { - struct ip_set *set = ip_set_rcu_get(index); + struct ip_set *set = ip_set_rcu_get( + dev_net(par->in ? par->in : par->out), index); int ret = 0; BUG_ON(set == NULL); @@ -494,7 +507,8 @@ int ip_set_add(ip_set_id_t index, const struct sk_buff *skb, const struct xt_action_param *par, struct ip_set_adt_opt *opt) { - struct ip_set *set = ip_set_rcu_get(index); + struct ip_set *set = ip_set_rcu_get( + dev_net(par->in ? par->in : par->out), index); int ret; BUG_ON(set == NULL); @@ -516,7 +530,8 @@ int ip_set_del(ip_set_id_t index, const struct sk_buff *skb, const struct xt_action_param *par, struct ip_set_adt_opt *opt) { - struct ip_set *set = ip_set_rcu_get(index); + struct ip_set *set = ip_set_rcu_get( + dev_net(par->in ? par->in : par->out), index); int ret = 0; BUG_ON(set == NULL); @@ -540,14 +555,15 @@ EXPORT_SYMBOL_GPL(ip_set_del); * */ ip_set_id_t -ip_set_get_byname(const char *name, struct ip_set **set) +ip_set_get_byname(struct net *net, const char *name, struct ip_set **set) { ip_set_id_t i, index = IPSET_INVALID_ID; struct ip_set *s; + struct ip_set_net *inst = ip_set_pernet(net); rcu_read_lock(); - for (i = 0; i < ip_set_max; i++) { - s = rcu_dereference(ip_set_list)[i]; + for (i = 0; i < inst->ip_set_max; i++) { + s = rcu_dereference(inst->ip_set_list)[i]; if (s != NULL && STREQ(s->name, name)) { __ip_set_get(s); index = i; @@ -567,17 +583,26 @@ EXPORT_SYMBOL_GPL(ip_set_get_byname); * to be valid, after calling this function. * */ -void -ip_set_put_byindex(ip_set_id_t index) + +static inline void +__ip_set_put_byindex(struct ip_set_net *inst, ip_set_id_t index) { struct ip_set *set; rcu_read_lock(); - set = rcu_dereference(ip_set_list)[index]; + set = rcu_dereference(inst->ip_set_list)[index]; if (set != NULL) __ip_set_put(set); rcu_read_unlock(); } + +void +ip_set_put_byindex(struct net *net, ip_set_id_t index) +{ + struct ip_set_net *inst = ip_set_pernet(net); + + __ip_set_put_byindex(inst, index); +} EXPORT_SYMBOL_GPL(ip_set_put_byindex); /* @@ -588,9 +613,9 @@ EXPORT_SYMBOL_GPL(ip_set_put_byindex); * */ const char * -ip_set_name_byindex(ip_set_id_t index) +ip_set_name_byindex(struct net *net, ip_set_id_t index) { - const struct ip_set *set = ip_set_rcu_get(index); + const struct ip_set *set = ip_set_rcu_get(net, index); BUG_ON(set == NULL); BUG_ON(set->ref == 0); @@ -612,14 +637,15 @@ EXPORT_SYMBOL_GPL(ip_set_name_byindex); * The nfnl mutex is used in the function. */ ip_set_id_t -ip_set_nfnl_get(const char *name) +ip_set_nfnl_get(struct net *net, const char *name) { ip_set_id_t i, index = IPSET_INVALID_ID; struct ip_set *s; + struct ip_set_net *inst = ip_set_pernet(net); lock_nfnl(); - for (i = 0; i < ip_set_max; i++) { - s = nfnl_set(i); + for (i = 0; i < inst->ip_set_max; i++) { + s = nfnl_set(inst, i); if (s != NULL && STREQ(s->name, name)) { __ip_set_get(s); index = i; @@ -639,15 +665,16 @@ EXPORT_SYMBOL_GPL(ip_set_nfnl_get); * The nfnl mutex is used in the function. */ ip_set_id_t -ip_set_nfnl_get_byindex(ip_set_id_t index) +ip_set_nfnl_get_byindex(struct net *net, ip_set_id_t index) { struct ip_set *set; + struct ip_set_net *inst = ip_set_pernet(net); - if (index > ip_set_max) + if (index > inst->ip_set_max) return IPSET_INVALID_ID; lock_nfnl(); - set = nfnl_set(index); + set = nfnl_set(inst, index); if (set) __ip_set_get(set); else @@ -666,13 +693,17 @@ EXPORT_SYMBOL_GPL(ip_set_nfnl_get_byindex); * The nfnl mutex is used in the function. */ void -ip_set_nfnl_put(ip_set_id_t index) +ip_set_nfnl_put(struct net *net, ip_set_id_t index) { struct ip_set *set; + struct ip_set_net *inst = ip_set_pernet(net); + lock_nfnl(); - set = nfnl_set(index); - if (set != NULL) - __ip_set_put(set); + if (!inst->is_deleted) { /* already deleted from ip_set_net_exit() */ + set = nfnl_set(inst, index); + if (set != NULL) + __ip_set_put(set); + } unlock_nfnl(); } EXPORT_SYMBOL_GPL(ip_set_nfnl_put); @@ -730,14 +761,14 @@ static const struct nla_policy ip_set_create_policy[IPSET_ATTR_CMD_MAX + 1] = { }; static struct ip_set * -find_set_and_id(const char *name, ip_set_id_t *id) +find_set_and_id(struct ip_set_net *inst, const char *name, ip_set_id_t *id) { struct ip_set *set = NULL; ip_set_id_t i; *id = IPSET_INVALID_ID; - for (i = 0; i < ip_set_max; i++) { - set = nfnl_set(i); + for (i = 0; i < inst->ip_set_max; i++) { + set = nfnl_set(inst, i); if (set != NULL && STREQ(set->name, name)) { *id = i; break; @@ -747,22 +778,23 @@ find_set_and_id(const char *name, ip_set_id_t *id) } static inline struct ip_set * -find_set(const char *name) +find_set(struct ip_set_net *inst, const char *name) { ip_set_id_t id; - return find_set_and_id(name, &id); + return find_set_and_id(inst, name, &id); } static int -find_free_id(const char *name, ip_set_id_t *index, struct ip_set **set) +find_free_id(struct ip_set_net *inst, const char *name, ip_set_id_t *index, + struct ip_set **set) { struct ip_set *s; ip_set_id_t i; *index = IPSET_INVALID_ID; - for (i = 0; i < ip_set_max; i++) { - s = nfnl_set(i); + for (i = 0; i < inst->ip_set_max; i++) { + s = nfnl_set(inst, i); if (s == NULL) { if (*index == IPSET_INVALID_ID) *index = i; @@ -791,6 +823,8 @@ ip_set_create(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct net *net = sock_net(ctnl); + struct ip_set_net *inst = ip_set_pernet(net); struct ip_set *set, *clash = NULL; ip_set_id_t index = IPSET_INVALID_ID; struct nlattr *tb[IPSET_ATTR_CREATE_MAX+1] = {}; @@ -849,7 +883,7 @@ ip_set_create(struct sock *ctnl, struct sk_buff *skb, goto put_out; } - ret = set->type->create(set, tb, flags); + ret = set->type->create(net, set, tb, flags); if (ret != 0) goto put_out; @@ -860,7 +894,7 @@ ip_set_create(struct sock *ctnl, struct sk_buff *skb, * by the nfnl mutex. Find the first free index in ip_set_list * and check clashing. */ - ret = find_free_id(set->name, &index, &clash); + ret = find_free_id(inst, set->name, &index, &clash); if (ret == -EEXIST) { /* If this is the same set and requested, ignore error */ if ((flags & IPSET_FLAG_EXIST) && @@ -873,9 +907,9 @@ ip_set_create(struct sock *ctnl, struct sk_buff *skb, goto cleanup; } else if (ret == -IPSET_ERR_MAX_SETS) { struct ip_set **list, **tmp; - ip_set_id_t i = ip_set_max + IP_SET_INC; + ip_set_id_t i = inst->ip_set_max + IP_SET_INC; - if (i < ip_set_max || i == IPSET_INVALID_ID) + if (i < inst->ip_set_max || i == IPSET_INVALID_ID) /* Wraparound */ goto cleanup; @@ -883,14 +917,14 @@ ip_set_create(struct sock *ctnl, struct sk_buff *skb, if (!list) goto cleanup; /* nfnl mutex is held, both lists are valid */ - tmp = nfnl_dereference(ip_set_list); - memcpy(list, tmp, sizeof(struct ip_set *) * ip_set_max); - rcu_assign_pointer(ip_set_list, list); + tmp = nfnl_dereference(inst->ip_set_list); + memcpy(list, tmp, sizeof(struct ip_set *) * inst->ip_set_max); + rcu_assign_pointer(inst->ip_set_list, list); /* Make sure all current packets have passed through */ synchronize_net(); /* Use new list */ - index = ip_set_max; - ip_set_max = i; + index = inst->ip_set_max; + inst->ip_set_max = i; kfree(tmp); ret = 0; } else if (ret) @@ -900,7 +934,7 @@ ip_set_create(struct sock *ctnl, struct sk_buff *skb, * Finally! Add our shiny new set to the list, and be done. */ pr_debug("create: '%s' created with index %u!\n", set->name, index); - nfnl_set(index) = set; + nfnl_set(inst, index) = set; return ret; @@ -923,12 +957,12 @@ ip_set_setname_policy[IPSET_ATTR_CMD_MAX + 1] = { }; static void -ip_set_destroy_set(ip_set_id_t index) +ip_set_destroy_set(struct ip_set_net *inst, ip_set_id_t index) { - struct ip_set *set = nfnl_set(index); + struct ip_set *set = nfnl_set(inst, index); pr_debug("set: %s\n", set->name); - nfnl_set(index) = NULL; + nfnl_set(inst, index) = NULL; /* Must call it without holding any lock */ set->variant->destroy(set); @@ -941,6 +975,7 @@ ip_set_destroy(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); struct ip_set *s; ip_set_id_t i; int ret = 0; @@ -960,21 +995,22 @@ ip_set_destroy(struct sock *ctnl, struct sk_buff *skb, */ read_lock_bh(&ip_set_ref_lock); if (!attr[IPSET_ATTR_SETNAME]) { - for (i = 0; i < ip_set_max; i++) { - s = nfnl_set(i); + for (i = 0; i < inst->ip_set_max; i++) { + s = nfnl_set(inst, i); if (s != NULL && s->ref) { ret = -IPSET_ERR_BUSY; goto out; } } read_unlock_bh(&ip_set_ref_lock); - for (i = 0; i < ip_set_max; i++) { - s = nfnl_set(i); + for (i = 0; i < inst->ip_set_max; i++) { + s = nfnl_set(inst, i); if (s != NULL) - ip_set_destroy_set(i); + ip_set_destroy_set(inst, i); } } else { - s = find_set_and_id(nla_data(attr[IPSET_ATTR_SETNAME]), &i); + s = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME]), + &i); if (s == NULL) { ret = -ENOENT; goto out; @@ -984,7 +1020,7 @@ ip_set_destroy(struct sock *ctnl, struct sk_buff *skb, } read_unlock_bh(&ip_set_ref_lock); - ip_set_destroy_set(i); + ip_set_destroy_set(inst, i); } return 0; out: @@ -1009,6 +1045,7 @@ ip_set_flush(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); struct ip_set *s; ip_set_id_t i; @@ -1016,13 +1053,13 @@ ip_set_flush(struct sock *ctnl, struct sk_buff *skb, return -IPSET_ERR_PROTOCOL; if (!attr[IPSET_ATTR_SETNAME]) { - for (i = 0; i < ip_set_max; i++) { - s = nfnl_set(i); + for (i = 0; i < inst->ip_set_max; i++) { + s = nfnl_set(inst, i); if (s != NULL) ip_set_flush_set(s); } } else { - s = find_set(nla_data(attr[IPSET_ATTR_SETNAME])); + s = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); if (s == NULL) return -ENOENT; @@ -1048,6 +1085,7 @@ ip_set_rename(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); struct ip_set *set, *s; const char *name2; ip_set_id_t i; @@ -1058,7 +1096,7 @@ ip_set_rename(struct sock *ctnl, struct sk_buff *skb, attr[IPSET_ATTR_SETNAME2] == NULL)) return -IPSET_ERR_PROTOCOL; - set = find_set(nla_data(attr[IPSET_ATTR_SETNAME])); + set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); if (set == NULL) return -ENOENT; @@ -1069,8 +1107,8 @@ ip_set_rename(struct sock *ctnl, struct sk_buff *skb, } name2 = nla_data(attr[IPSET_ATTR_SETNAME2]); - for (i = 0; i < ip_set_max; i++) { - s = nfnl_set(i); + for (i = 0; i < inst->ip_set_max; i++) { + s = nfnl_set(inst, i); if (s != NULL && STREQ(s->name, name2)) { ret = -IPSET_ERR_EXIST_SETNAME2; goto out; @@ -1097,6 +1135,7 @@ ip_set_swap(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); struct ip_set *from, *to; ip_set_id_t from_id, to_id; char from_name[IPSET_MAXNAMELEN]; @@ -1106,11 +1145,13 @@ ip_set_swap(struct sock *ctnl, struct sk_buff *skb, attr[IPSET_ATTR_SETNAME2] == NULL)) return -IPSET_ERR_PROTOCOL; - from = find_set_and_id(nla_data(attr[IPSET_ATTR_SETNAME]), &from_id); + from = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME]), + &from_id); if (from == NULL) return -ENOENT; - to = find_set_and_id(nla_data(attr[IPSET_ATTR_SETNAME2]), &to_id); + to = find_set_and_id(inst, nla_data(attr[IPSET_ATTR_SETNAME2]), + &to_id); if (to == NULL) return -IPSET_ERR_EXIST_SETNAME2; @@ -1127,8 +1168,8 @@ ip_set_swap(struct sock *ctnl, struct sk_buff *skb, write_lock_bh(&ip_set_ref_lock); swap(from->ref, to->ref); - nfnl_set(from_id) = to; - nfnl_set(to_id) = from; + nfnl_set(inst, from_id) = to; + nfnl_set(inst, to_id) = from; write_unlock_bh(&ip_set_ref_lock); return 0; @@ -1147,9 +1188,10 @@ ip_set_swap(struct sock *ctnl, struct sk_buff *skb, static int ip_set_dump_done(struct netlink_callback *cb) { + struct ip_set_net *inst = (struct ip_set_net *)cb->data; if (cb->args[2]) { - pr_debug("release set %s\n", nfnl_set(cb->args[1])->name); - ip_set_put_byindex((ip_set_id_t) cb->args[1]); + pr_debug("release set %s\n", nfnl_set(inst, cb->args[1])->name); + __ip_set_put_byindex(inst, (ip_set_id_t) cb->args[1]); } return 0; } @@ -1175,6 +1217,7 @@ dump_init(struct netlink_callback *cb) struct nlattr *attr = (void *)nlh + min_len; u32 dump_type; ip_set_id_t index; + struct ip_set_net *inst = (struct ip_set_net *)cb->data; /* Second pass, so parser can't fail */ nla_parse(cda, IPSET_ATTR_CMD_MAX, @@ -1188,7 +1231,7 @@ dump_init(struct netlink_callback *cb) if (cda[IPSET_ATTR_SETNAME]) { struct ip_set *set; - set = find_set_and_id(nla_data(cda[IPSET_ATTR_SETNAME]), + set = find_set_and_id(inst, nla_data(cda[IPSET_ATTR_SETNAME]), &index); if (set == NULL) return -ENOENT; @@ -1216,6 +1259,7 @@ ip_set_dump_start(struct sk_buff *skb, struct netlink_callback *cb) unsigned int flags = NETLINK_PORTID(cb->skb) ? NLM_F_MULTI : 0; u32 dump_type, dump_flags; int ret = 0; + struct ip_set_net *inst = (struct ip_set_net *)cb->data; if (!cb->args[0]) { ret = dump_init(cb); @@ -1229,18 +1273,18 @@ ip_set_dump_start(struct sk_buff *skb, struct netlink_callback *cb) } } - if (cb->args[1] >= ip_set_max) + if (cb->args[1] >= inst->ip_set_max) goto out; dump_type = DUMP_TYPE(cb->args[0]); dump_flags = DUMP_FLAGS(cb->args[0]); - max = dump_type == DUMP_ONE ? cb->args[1] + 1 : ip_set_max; + max = dump_type == DUMP_ONE ? cb->args[1] + 1 : inst->ip_set_max; dump_last: pr_debug("args[0]: %u %u args[1]: %ld\n", dump_type, dump_flags, cb->args[1]); for (; cb->args[1] < max; cb->args[1]++) { index = (ip_set_id_t) cb->args[1]; - set = nfnl_set(index); + set = nfnl_set(inst, index); if (set == NULL) { if (dump_type == DUMP_ONE) { ret = -ENOENT; @@ -1318,8 +1362,8 @@ next_set: release_refcount: /* If there was an error or set is done, release set */ if (ret || !cb->args[2]) { - pr_debug("release set %s\n", nfnl_set(index)->name); - ip_set_put_byindex(index); + pr_debug("release set %s\n", nfnl_set(inst, index)->name); + __ip_set_put_byindex(inst, index); cb->args[2] = 0; } out: @@ -1337,6 +1381,8 @@ ip_set_dump(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); + if (unlikely(protocol_failed(attr))) return -IPSET_ERR_PROTOCOL; @@ -1353,6 +1399,7 @@ ip_set_dump(struct sock *ctnl, struct sk_buff *skb, struct netlink_dump_control c = { .dump = ip_set_dump_start, .done = ip_set_dump_done, + .data = (void *)inst }; return netlink_dump_start(ctnl, skb, nlh, &c); } @@ -1432,6 +1479,7 @@ ip_set_uadd(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); struct ip_set *set; struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {}; const struct nlattr *nla; @@ -1450,7 +1498,7 @@ ip_set_uadd(struct sock *ctnl, struct sk_buff *skb, attr[IPSET_ATTR_LINENO] == NULL)))) return -IPSET_ERR_PROTOCOL; - set = find_set(nla_data(attr[IPSET_ATTR_SETNAME])); + set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); if (set == NULL) return -ENOENT; @@ -1486,6 +1534,7 @@ ip_set_udel(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); struct ip_set *set; struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {}; const struct nlattr *nla; @@ -1504,7 +1553,7 @@ ip_set_udel(struct sock *ctnl, struct sk_buff *skb, attr[IPSET_ATTR_LINENO] == NULL)))) return -IPSET_ERR_PROTOCOL; - set = find_set(nla_data(attr[IPSET_ATTR_SETNAME])); + set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); if (set == NULL) return -ENOENT; @@ -1540,6 +1589,7 @@ ip_set_utest(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); struct ip_set *set; struct nlattr *tb[IPSET_ATTR_ADT_MAX+1] = {}; int ret = 0; @@ -1550,7 +1600,7 @@ ip_set_utest(struct sock *ctnl, struct sk_buff *skb, !flag_nested(attr[IPSET_ATTR_DATA]))) return -IPSET_ERR_PROTOCOL; - set = find_set(nla_data(attr[IPSET_ATTR_SETNAME])); + set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); if (set == NULL) return -ENOENT; @@ -1575,6 +1625,7 @@ ip_set_header(struct sock *ctnl, struct sk_buff *skb, const struct nlmsghdr *nlh, const struct nlattr * const attr[]) { + struct ip_set_net *inst = ip_set_pernet(sock_net(ctnl)); const struct ip_set *set; struct sk_buff *skb2; struct nlmsghdr *nlh2; @@ -1584,7 +1635,7 @@ ip_set_header(struct sock *ctnl, struct sk_buff *skb, attr[IPSET_ATTR_SETNAME] == NULL)) return -IPSET_ERR_PROTOCOL; - set = find_set(nla_data(attr[IPSET_ATTR_SETNAME])); + set = find_set(inst, nla_data(attr[IPSET_ATTR_SETNAME])); if (set == NULL) return -ENOENT; @@ -1809,8 +1860,10 @@ ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len) unsigned int *op; void *data; int copylen = *len, ret = 0; + struct net *net = sock_net(sk); + struct ip_set_net *inst = ip_set_pernet(net); - if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN)) + if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) return -EPERM; if (optval != SO_IP_SET) return -EBADF; @@ -1859,7 +1912,7 @@ ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len) } req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0'; lock_nfnl(); - find_set_and_id(req_get->set.name, &id); + find_set_and_id(inst, req_get->set.name, &id); req_get->set.index = id; unlock_nfnl(); goto copy; @@ -1874,10 +1927,10 @@ ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len) } req_get->set.name[IPSET_MAXNAMELEN - 1] = '\0'; lock_nfnl(); - find_set_and_id(req_get->set.name, &id); + find_set_and_id(inst, req_get->set.name, &id); req_get->set.index = id; if (id != IPSET_INVALID_ID) - req_get->family = nfnl_set(id)->family; + req_get->family = nfnl_set(inst, id)->family; unlock_nfnl(); goto copy; } @@ -1886,12 +1939,12 @@ ip_set_sockfn_get(struct sock *sk, int optval, void __user *user, int *len) struct ip_set *set; if (*len != sizeof(struct ip_set_req_get_set) || - req_get->set.index >= ip_set_max) { + req_get->set.index >= inst->ip_set_max) { ret = -EINVAL; goto done; } lock_nfnl(); - set = nfnl_set(req_get->set.index); + set = nfnl_set(inst, req_get->set.index); strncpy(req_get->set.name, set ? set->name : "", IPSET_MAXNAMELEN); unlock_nfnl(); @@ -1920,49 +1973,82 @@ static struct nf_sockopt_ops so_set __read_mostly = { .owner = THIS_MODULE, }; -static int __init -ip_set_init(void) +static int __net_init +ip_set_net_init(struct net *net) { + struct ip_set_net *inst = ip_set_pernet(net); + struct ip_set **list; - int ret; - if (max_sets) - ip_set_max = max_sets; - if (ip_set_max >= IPSET_INVALID_ID) - ip_set_max = IPSET_INVALID_ID - 1; + inst->ip_set_max = max_sets ? max_sets : CONFIG_IP_SET_MAX; + if (inst->ip_set_max >= IPSET_INVALID_ID) + inst->ip_set_max = IPSET_INVALID_ID - 1; - list = kzalloc(sizeof(struct ip_set *) * ip_set_max, GFP_KERNEL); + list = kzalloc(sizeof(struct ip_set *) * inst->ip_set_max, GFP_KERNEL); if (!list) return -ENOMEM; + inst->is_deleted = 0; + rcu_assign_pointer(inst->ip_set_list, list); + pr_notice("ip_set: protocol %u\n", IPSET_PROTOCOL); + return 0; +} + +static void __net_exit +ip_set_net_exit(struct net *net) +{ + struct ip_set_net *inst = ip_set_pernet(net); + + struct ip_set *set = NULL; + ip_set_id_t i; + + inst->is_deleted = 1; /* flag for ip_set_nfnl_put */ + + for (i = 0; i < inst->ip_set_max; i++) { + set = nfnl_set(inst, i); + if (set != NULL) + ip_set_destroy_set(inst, i); + } + kfree(rcu_dereference_protected(inst->ip_set_list, 1)); +} + +static struct pernet_operations ip_set_net_ops = { + .init = ip_set_net_init, + .exit = ip_set_net_exit, + .id = &ip_set_net_id, + .size = sizeof(struct ip_set_net) +}; + - rcu_assign_pointer(ip_set_list, list); - ret = nfnetlink_subsys_register(&ip_set_netlink_subsys); +static int __init +ip_set_init(void) +{ + int ret = nfnetlink_subsys_register(&ip_set_netlink_subsys); if (ret != 0) { pr_err("ip_set: cannot register with nfnetlink.\n"); - kfree(list); return ret; } ret = nf_register_sockopt(&so_set); if (ret != 0) { pr_err("SO_SET registry failed: %d\n", ret); nfnetlink_subsys_unregister(&ip_set_netlink_subsys); - kfree(list); return ret; } - - pr_notice("ip_set: protocol %u\n", IPSET_PROTOCOL); + ret = register_pernet_subsys(&ip_set_net_ops); + if (ret) { + pr_err("ip_set: cannot register pernet_subsys.\n"); + nf_unregister_sockopt(&so_set); + nfnetlink_subsys_unregister(&ip_set_netlink_subsys); + return ret; + } return 0; } static void __exit ip_set_fini(void) { - struct ip_set **list = rcu_dereference_protected(ip_set_list, 1); - - /* There can't be any existing set */ + unregister_pernet_subsys(&ip_set_net_ops); nf_unregister_sockopt(&so_set); nfnetlink_subsys_unregister(&ip_set_netlink_subsys); - kfree(list); pr_debug("these are the famous last words\n"); } -- cgit v1.2.3