X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fxfrm%2Fxfrm_user.c;h=b95a2d64eb59c3f86e066acc86fee8e2e7fb61e1;hb=91b208c7c1db4cefa2247f8243fbda75b0472d24;hp=52c7fce546417a3ff529e4a98d9e7c768c979c3e;hpb=658b219e9379d75fbdc578b9630b598098471258;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 52c7fce..b95a2d6 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -31,7 +31,7 @@ #include #endif -static inline int alg_len(struct xfrm_algo *alg) +static inline int aead_len(struct xfrm_algo_aead *alg) { return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); } @@ -45,24 +45,13 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) return 0; algp = nla_data(rt); - if (nla_len(rt) < alg_len(algp)) + if (nla_len(rt) < xfrm_alg_len(algp)) return -EINVAL; switch (type) { case XFRMA_ALG_AUTH: - if (!algp->alg_key_len && - strcmp(algp->alg_name, "digest_null") != 0) - return -EINVAL; - break; - case XFRMA_ALG_CRYPT: - if (!algp->alg_key_len && - strcmp(algp->alg_name, "cipher_null") != 0) - return -EINVAL; - break; - case XFRMA_ALG_COMP: - /* Zero length keys are legal. */ break; default: @@ -73,6 +62,22 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) return 0; } +static int verify_aead(struct nlattr **attrs) +{ + struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; + struct xfrm_algo_aead *algp; + + if (!rt) + return 0; + + algp = nla_data(rt); + if (nla_len(rt) < aead_len(algp)) + return -EINVAL; + + algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; + return 0; +} + static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, xfrm_address_t **addrp) { @@ -124,20 +129,28 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, switch (p->id.proto) { case IPPROTO_AH: if (!attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_CRYPT] || attrs[XFRMA_ALG_COMP]) goto out; break; case IPPROTO_ESP: - if ((!attrs[XFRMA_ALG_AUTH] && - !attrs[XFRMA_ALG_CRYPT]) || - attrs[XFRMA_ALG_COMP]) + if (attrs[XFRMA_ALG_COMP]) + goto out; + if (!attrs[XFRMA_ALG_AUTH] && + !attrs[XFRMA_ALG_CRYPT] && + !attrs[XFRMA_ALG_AEAD]) + goto out; + if ((attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_CRYPT]) && + attrs[XFRMA_ALG_AEAD]) goto out; break; case IPPROTO_COMP: if (!attrs[XFRMA_ALG_COMP] || + attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_AUTH] || attrs[XFRMA_ALG_CRYPT]) goto out; @@ -148,6 +161,7 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, case IPPROTO_ROUTING: if (attrs[XFRMA_ALG_COMP] || attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_CRYPT] || attrs[XFRMA_ENCAP] || attrs[XFRMA_SEC_CTX] || @@ -160,6 +174,8 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, goto out; } + if ((err = verify_aead(attrs))) + goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) @@ -204,7 +220,32 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, return -ENOSYS; *props = algo->desc.sadb_alg_id; - p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL); + p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL); + if (!p) + return -ENOMEM; + + strcpy(p->alg_name, algo->name); + *algpp = p; + return 0; +} + +static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, + struct nlattr *rta) +{ + struct xfrm_algo_aead *p, *ualg; + struct xfrm_algo_desc *algo; + + if (!rta) + return 0; + + ualg = nla_data(rta); + + algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1); + if (!algo) + return -ENOSYS; + *props = algo->desc.sadb_alg_id; + + p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL); if (!p) return -ENOMEM; @@ -236,11 +277,7 @@ static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info * memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); x->props.flags = p->flags; - /* - * Set inner address family if the KM left it as zero. - * See comment in validate_tmpl. - */ - if (!x->sel.family) + if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) x->sel.family = p->family; } @@ -279,11 +316,12 @@ static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) x->replay_maxdiff = nla_get_u32(rt); } -static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, +static struct xfrm_state *xfrm_state_construct(struct net *net, + struct xfrm_usersa_info *p, struct nlattr **attrs, int *errp) { - struct xfrm_state *x = xfrm_state_alloc(); + struct xfrm_state *x = xfrm_state_alloc(net); int err = -ENOMEM; if (!x) @@ -291,6 +329,9 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, copy_from_user_state(x, p); + if ((err = attach_aead(&x->aead, &x->props.ealgo, + attrs[XFRMA_ALG_AEAD]))) + goto error; if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, xfrm_aalg_get_byname, attrs[XFRMA_ALG_AUTH]))) @@ -327,9 +368,9 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, goto error; x->km.seq = p->seq; - x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; + x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; /* sysctl_xfrm_aevent_etime is in 100ms units */ - x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; + x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; x->preplay.bitmap = 0; x->preplay.seq = x->replay.seq+x->replay_maxdiff; x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; @@ -351,16 +392,20 @@ error_no_put: static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_usersa_info *p = nlmsg_data(nlh); struct xfrm_state *x; int err; struct km_event c; + uid_t loginuid = NETLINK_CB(skb).loginuid; + u32 sessionid = NETLINK_CB(skb).sessionid; + u32 sid = NETLINK_CB(skb).sid; err = verify_newsa_info(p, attrs); if (err) return err; - x = xfrm_state_construct(p, attrs, &err); + x = xfrm_state_construct(net, p, attrs, &err); if (!x) return err; @@ -370,8 +415,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, else err = xfrm_state_update(x); - xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_state_add(x, err ? 0 : 1, loginuid, sessionid, sid); if (err < 0) { x->km.state = XFRM_STATE_DEAD; @@ -389,7 +433,8 @@ out: return err; } -static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, +static struct xfrm_state *xfrm_user_state_lookup(struct net *net, + struct xfrm_usersa_id *p, struct nlattr **attrs, int *errp) { @@ -398,7 +443,7 @@ static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { err = -ESRCH; - x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); + x = xfrm_state_lookup(net, &p->daddr, p->spi, p->proto, p->family); } else { xfrm_address_t *saddr = NULL; @@ -409,8 +454,8 @@ static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, } err = -ESRCH; - x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto, - p->family); + x = xfrm_state_lookup_byaddr(net, &p->daddr, saddr, + p->proto, p->family); } out: @@ -422,12 +467,16 @@ static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; int err = -ESRCH; struct km_event c; struct xfrm_usersa_id *p = nlmsg_data(nlh); + uid_t loginuid = NETLINK_CB(skb).loginuid; + u32 sessionid = NETLINK_CB(skb).sessionid; + u32 sid = NETLINK_CB(skb).sid; - x = xfrm_user_state_lookup(p, attrs, &err); + x = xfrm_user_state_lookup(net, p, attrs, &err); if (x == NULL) return err; @@ -450,8 +499,7 @@ static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, km_state_notify(x, &c); out: - xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_state_delete(x, err ? 0 : 1, loginuid, sessionid, sid); xfrm_state_put(x); return err; } @@ -477,15 +525,13 @@ struct xfrm_dump_info { struct sk_buff *out_skb; u32 nlmsg_seq; u16 nlmsg_flags; - int start_idx; - int this_idx; }; static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) { - int ctx_size = sizeof(struct xfrm_sec_ctx) + s->ctx_len; struct xfrm_user_sec_ctx *uctx; struct nlattr *attr; + int ctx_size = sizeof(*uctx) + s->ctx_len; attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); if (attr == NULL) @@ -502,29 +548,25 @@ static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) return 0; } -static int dump_one_state(struct xfrm_state *x, int count, void *ptr) +/* Don't change this without updating xfrm_sa_len! */ +static int copy_to_user_state_extra(struct xfrm_state *x, + struct xfrm_usersa_info *p, + struct sk_buff *skb) { - struct xfrm_dump_info *sp = ptr; - struct sk_buff *in_skb = sp->in_skb; - struct sk_buff *skb = sp->out_skb; - struct xfrm_usersa_info *p; - struct nlmsghdr *nlh; - - if (sp->this_idx < sp->start_idx) - goto out; + copy_to_user_state(x, p); - nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, - XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); - if (nlh == NULL) - return -EMSGSIZE; + if (x->coaddr) + NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); - p = nlmsg_data(nlh); - copy_to_user_state(x, p); + if (x->lastused) + NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); + if (x->aead) + NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); if (x->aalg) - NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg); + NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg); if (x->ealg) - NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg); + NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); if (x->calg) NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); @@ -534,34 +576,67 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr) if (x->security && copy_sec_ctx(x->security, skb) < 0) goto nla_put_failure; - if (x->coaddr) - NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); + return 0; - if (x->lastused) - NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); +nla_put_failure: + return -EMSGSIZE; +} + +static int dump_one_state(struct xfrm_state *x, int count, void *ptr) +{ + struct xfrm_dump_info *sp = ptr; + struct sk_buff *in_skb = sp->in_skb; + struct sk_buff *skb = sp->out_skb; + struct xfrm_usersa_info *p; + struct nlmsghdr *nlh; + int err; + + nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, + XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); + if (nlh == NULL) + return -EMSGSIZE; + + p = nlmsg_data(nlh); + + err = copy_to_user_state_extra(x, p, skb); + if (err) + goto nla_put_failure; nlmsg_end(skb, nlh); -out: - sp->this_idx++; return 0; nla_put_failure: nlmsg_cancel(skb, nlh); - return -EMSGSIZE; + return err; +} + +static int xfrm_dump_sa_done(struct netlink_callback *cb) +{ + struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; + xfrm_state_walk_done(walk); + return 0; } static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) { + struct net *net = sock_net(skb->sk); + struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; struct xfrm_dump_info info; + BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > + sizeof(cb->args) - sizeof(cb->args[0])); + info.in_skb = cb->skb; info.out_skb = skb; info.nlmsg_seq = cb->nlh->nlmsg_seq; info.nlmsg_flags = NLM_F_MULTI; - info.this_idx = 0; - info.start_idx = cb->args[0]; - (void) xfrm_state_walk(0, dump_one_state, &info); - cb->args[0] = info.this_idx; + + if (!cb->args[0]) { + cb->args[0] = 1; + xfrm_state_walk_init(walk, 0); + } + + (void) xfrm_state_walk(net, walk, dump_one_state, &info); return skb->len; } @@ -580,7 +655,6 @@ static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, info.out_skb = skb; info.nlmsg_seq = seq; info.nlmsg_flags = 0; - info.this_idx = info.start_idx = 0; if (dump_one_state(x, 0, &info)) { kfree_skb(skb); @@ -634,6 +708,7 @@ nla_put_failure: static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct sk_buff *r_skb; u32 *flags = nlmsg_data(nlh); u32 spid = NETLINK_CB(skb).pid; @@ -646,7 +721,7 @@ static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, if (build_spdinfo(r_skb, spid, seq, *flags) < 0) BUG(); - return nlmsg_unicast(xfrm_nl, r_skb, spid); + return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); } static inline size_t xfrm_sadinfo_msgsize(void) @@ -687,6 +762,7 @@ nla_put_failure: static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct sk_buff *r_skb; u32 *flags = nlmsg_data(nlh); u32 spid = NETLINK_CB(skb).pid; @@ -699,18 +775,19 @@ static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, if (build_sadinfo(r_skb, spid, seq, *flags) < 0) BUG(); - return nlmsg_unicast(xfrm_nl, r_skb, spid); + return nlmsg_unicast(net->xfrm.nlsk, r_skb, spid); } static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_usersa_id *p = nlmsg_data(nlh); struct xfrm_state *x; struct sk_buff *resp_skb; int err = -ESRCH; - x = xfrm_user_state_lookup(p, attrs, &err); + x = xfrm_user_state_lookup(net, p, attrs, &err); if (x == NULL) goto out_noput; @@ -718,7 +795,7 @@ static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); } else { - err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); + err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); } xfrm_state_put(x); out_noput: @@ -751,6 +828,7 @@ static int verify_userspi_info(struct xfrm_userspi_info *p) static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; struct xfrm_userspi_info *p; struct sk_buff *resp_skb; @@ -768,7 +846,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, x = NULL; if (p->info.seq) { - x = xfrm_find_acq_byseq(p->info.seq); + x = xfrm_find_acq_byseq(net, p->info.seq); if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { xfrm_state_put(x); x = NULL; @@ -776,7 +854,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, } if (!x) - x = xfrm_find_acq(p->info.mode, p->info.reqid, + x = xfrm_find_acq(net, p->info.mode, p->info.reqid, p->info.id.proto, daddr, &p->info.saddr, 1, family); @@ -794,7 +872,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, goto out; } - err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); + err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); out: xfrm_state_put(x); @@ -882,7 +960,7 @@ static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs return 0; uctx = nla_data(rt); - return security_xfrm_policy_alloc(pol, uctx); + return security_xfrm_policy_alloc(&pol->security, uctx); } static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, @@ -904,6 +982,8 @@ static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, t->aalgos = ut->aalgos; t->ealgos = ut->ealgos; t->calgos = ut->calgos; + /* If all masks are ~0, then we allow all algorithms. */ + t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); t->encap_family = ut->family; } } @@ -1007,9 +1087,9 @@ static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_i p->share = XFRM_SHARE_ANY; /* XXX xp->share */ } -static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) +static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) { - struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); + struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); int err; if (!xp) { @@ -1031,18 +1111,23 @@ static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, return xp; error: *errp = err; - kfree(xp); + xp->walk.dead = 1; + xfrm_policy_destroy(xp); return NULL; } static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_userpolicy_info *p = nlmsg_data(nlh); struct xfrm_policy *xp; struct km_event c; int err; int excl; + uid_t loginuid = NETLINK_CB(skb).loginuid; + u32 sessionid = NETLINK_CB(skb).sessionid; + u32 sid = NETLINK_CB(skb).sid; err = verify_newpolicy_info(p); if (err) @@ -1051,7 +1136,7 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, if (err) return err; - xp = xfrm_policy_construct(p, attrs, &err); + xp = xfrm_policy_construct(net, p, attrs, &err); if (!xp) return err; @@ -1061,11 +1146,10 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, * a type XFRM_MSG_UPDPOLICY - JHS */ excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; err = xfrm_policy_insert(p->dir, xp, excl); - xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_policy_add(xp, err ? 0 : 1, loginuid, sessionid, sid); if (err) { - security_xfrm_policy_free(xp); + security_xfrm_policy_free(xp->security); kfree(xp); return err; } @@ -1157,9 +1241,6 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr struct sk_buff *skb = sp->out_skb; struct nlmsghdr *nlh; - if (sp->this_idx < sp->start_idx) - goto out; - nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); if (nlh == NULL) @@ -1175,8 +1256,6 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr goto nlmsg_failure; nlmsg_end(skb, nlh); -out: - sp->this_idx++; return 0; nlmsg_failure: @@ -1184,21 +1263,34 @@ nlmsg_failure: return -EMSGSIZE; } +static int xfrm_dump_policy_done(struct netlink_callback *cb) +{ + struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; + + xfrm_policy_walk_done(walk); + return 0; +} + static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) { + struct net *net = sock_net(skb->sk); + struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; struct xfrm_dump_info info; + BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > + sizeof(cb->args) - sizeof(cb->args[0])); + info.in_skb = cb->skb; info.out_skb = skb; info.nlmsg_seq = cb->nlh->nlmsg_seq; info.nlmsg_flags = NLM_F_MULTI; - info.this_idx = 0; - info.start_idx = cb->args[0]; - (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info); -#ifdef CONFIG_XFRM_SUB_POLICY - (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info); -#endif - cb->args[0] = info.this_idx; + + if (!cb->args[0]) { + cb->args[0] = 1; + xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); + } + + (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); return skb->len; } @@ -1218,7 +1310,6 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, info.out_skb = skb; info.nlmsg_seq = seq; info.nlmsg_flags = 0; - info.this_idx = info.start_idx = 0; if (dump_one_policy(xp, dir, 0, &info) < 0) { kfree_skb(skb); @@ -1231,6 +1322,7 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_userpolicy_id *p; u8 type = XFRM_POLICY_TYPE_MAIN; @@ -1250,25 +1342,26 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, return err; if (p->index) - xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); + xp = xfrm_policy_byid(net, type, p->dir, p->index, delete, &err); else { struct nlattr *rt = attrs[XFRMA_SEC_CTX]; - struct xfrm_policy tmp; + struct xfrm_sec_ctx *ctx; err = verify_sec_ctx_len(attrs); if (err) return err; - memset(&tmp, 0, sizeof(struct xfrm_policy)); + ctx = NULL; if (rt) { struct xfrm_user_sec_ctx *uctx = nla_data(rt); - if ((err = security_xfrm_policy_alloc(&tmp, uctx))) + err = security_xfrm_policy_alloc(&ctx, uctx); + if (err) return err; } - xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, + xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, delete, &err); - security_xfrm_policy_free(&tmp); + security_xfrm_policy_free(ctx); } if (xp == NULL) return -ENOENT; @@ -1280,13 +1373,16 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); } else { - err = nlmsg_unicast(xfrm_nl, resp_skb, + err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).pid); } } else { - xfrm_audit_policy_delete(xp, err ? 0 : 1, - NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + uid_t loginuid = NETLINK_CB(skb).loginuid; + u32 sessionid = NETLINK_CB(skb).sessionid; + u32 sid = NETLINK_CB(skb).sid; + + xfrm_audit_policy_delete(xp, err ? 0 : 1, loginuid, sessionid, + sid); if (err != 0) goto out; @@ -1306,20 +1402,23 @@ out: static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct km_event c; struct xfrm_usersa_flush *p = nlmsg_data(nlh); struct xfrm_audit audit_info; int err; audit_info.loginuid = NETLINK_CB(skb).loginuid; + audit_info.sessionid = NETLINK_CB(skb).sessionid; audit_info.secid = NETLINK_CB(skb).sid; - err = xfrm_state_flush(p->proto, &audit_info); + err = xfrm_state_flush(net, p->proto, &audit_info); if (err) return err; c.data.proto = p->proto; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; c.pid = nlh->nlmsg_pid; + c.net = net; km_state_notify(NULL, &c); return 0; @@ -1372,6 +1471,7 @@ nla_put_failure: static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; struct sk_buff *r_skb; int err; @@ -1383,7 +1483,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, if (r_skb == NULL) return -ENOMEM; - x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); + x = xfrm_state_lookup(net, &id->daddr, id->spi, id->proto, id->family); if (x == NULL) { kfree_skb(r_skb); return -ESRCH; @@ -1401,7 +1501,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, if (build_aevent(r_skb, x, &c) < 0) BUG(); - err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid); + err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).pid); spin_unlock_bh(&x->lock); xfrm_state_put(x); return err; @@ -1410,6 +1510,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; struct km_event c; int err = - EINVAL; @@ -1424,7 +1525,7 @@ static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) return err; - x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); + x = xfrm_state_lookup(net, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); if (x == NULL) return -ESRCH; @@ -1449,6 +1550,7 @@ out: static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct km_event c; u8 type = XFRM_POLICY_TYPE_MAIN; int err; @@ -1459,14 +1561,16 @@ static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, return err; audit_info.loginuid = NETLINK_CB(skb).loginuid; + audit_info.sessionid = NETLINK_CB(skb).sessionid; audit_info.secid = NETLINK_CB(skb).sid; - err = xfrm_policy_flush(type, &audit_info); + err = xfrm_policy_flush(net, type, &audit_info); if (err) return err; c.data.type = type; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; c.pid = nlh->nlmsg_pid; + c.net = net; km_policy_notify(NULL, 0, &c); return 0; } @@ -1474,6 +1578,7 @@ static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_user_polexpire *up = nlmsg_data(nlh); struct xfrm_userpolicy_info *p = &up->pol; @@ -1485,31 +1590,31 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, return err; if (p->index) - xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); + xp = xfrm_policy_byid(net, type, p->dir, p->index, 0, &err); else { struct nlattr *rt = attrs[XFRMA_SEC_CTX]; - struct xfrm_policy tmp; + struct xfrm_sec_ctx *ctx; err = verify_sec_ctx_len(attrs); if (err) return err; - memset(&tmp, 0, sizeof(struct xfrm_policy)); + ctx = NULL; if (rt) { struct xfrm_user_sec_ctx *uctx = nla_data(rt); - if ((err = security_xfrm_policy_alloc(&tmp, uctx))) + err = security_xfrm_policy_alloc(&ctx, uctx); + if (err) return err; } - xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, - 0, &err); - security_xfrm_policy_free(&tmp); + xp = xfrm_policy_bysel_ctx(net, type, p->dir, &p->sel, ctx, 0, &err); + security_xfrm_policy_free(ctx); } - if (xp == NULL) return -ENOENT; + read_lock(&xp->lock); - if (xp->dead) { + if (xp->walk.dead) { read_unlock(&xp->lock); goto out; } @@ -1517,9 +1622,11 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, read_unlock(&xp->lock); err = 0; if (up->hard) { + uid_t loginuid = NETLINK_CB(skb).loginuid; + uid_t sessionid = NETLINK_CB(skb).sessionid; + u32 sid = NETLINK_CB(skb).sid; xfrm_policy_delete(xp, p->dir); - xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_policy_delete(xp, 1, loginuid, sessionid, sid); } else { // reset the timers here? @@ -1535,12 +1642,13 @@ out: static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; int err; struct xfrm_user_expire *ue = nlmsg_data(nlh); struct xfrm_usersa_info *p = &ue->state; - x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); + x = xfrm_state_lookup(net, &p->id.daddr, p->id.spi, p->id.proto, p->family); err = -ENOENT; if (x == NULL) @@ -1553,9 +1661,11 @@ static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, km_state_expired(x, ue->hard, current->pid); if (ue->hard) { + uid_t loginuid = NETLINK_CB(skb).loginuid; + uid_t sessionid = NETLINK_CB(skb).sessionid; + u32 sid = NETLINK_CB(skb).sid; __xfrm_state_delete(x); - xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_state_delete(x, 1, loginuid, sessionid, sid); } err = 0; out: @@ -1567,31 +1677,27 @@ out: static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_user_tmpl *ut; int i; struct nlattr *rt = attrs[XFRMA_TMPL]; struct xfrm_user_acquire *ua = nlmsg_data(nlh); - struct xfrm_state *x = xfrm_state_alloc(); + struct xfrm_state *x = xfrm_state_alloc(net); int err = -ENOMEM; if (!x) - return err; + goto nomem; err = verify_newpolicy_info(&ua->policy); - if (err) { - printk("BAD policy passed\n"); - kfree(x); - return err; - } + if (err) + goto bad_policy; /* build an XP */ - xp = xfrm_policy_construct(&ua->policy, attrs, &err); - if (!xp) { - kfree(x); - return err; - } + xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); + if (!xp) + goto free_state; memcpy(&x->id, &ua->id, sizeof(ua->id)); memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); @@ -1616,16 +1722,34 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, kfree(xp); return 0; + +bad_policy: + printk("BAD policy passed\n"); +free_state: + kfree(x); +nomem: + return err; } #ifdef CONFIG_XFRM_MIGRATE static int copy_from_user_migrate(struct xfrm_migrate *ma, + struct xfrm_kmaddress *k, struct nlattr **attrs, int *num) { struct nlattr *rt = attrs[XFRMA_MIGRATE]; struct xfrm_user_migrate *um; int i, num_migrate; + if (k != NULL) { + struct xfrm_user_kmaddress *uk; + + uk = nla_data(attrs[XFRMA_KMADDRESS]); + memcpy(&k->local, &uk->local, sizeof(k->local)); + memcpy(&k->remote, &uk->remote, sizeof(k->remote)); + k->family = uk->family; + k->reserved = uk->reserved; + } + um = nla_data(rt); num_migrate = nla_len(rt) / sizeof(*um); @@ -1655,6 +1779,7 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, { struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); struct xfrm_migrate m[XFRM_MAX_DEPTH]; + struct xfrm_kmaddress km, *kmp; u8 type; int err; int n = 0; @@ -1662,19 +1787,20 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, if (attrs[XFRMA_MIGRATE] == NULL) return -EINVAL; + kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; + err = copy_from_user_policy_type(&type, attrs); if (err) return err; - err = copy_from_user_migrate((struct xfrm_migrate *)m, - attrs, &n); + err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); if (err) return err; if (!n) return 0; - xfrm_migrate(&pi->sel, pi->dir, type, m, n); + xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp); return 0; } @@ -1705,16 +1831,30 @@ static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); } -static inline size_t xfrm_migrate_msgsize(int num_migrate) +static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb) +{ + struct xfrm_user_kmaddress uk; + + memset(&uk, 0, sizeof(uk)); + uk.family = k->family; + uk.reserved = k->reserved; + memcpy(&uk.local, &k->local, sizeof(uk.local)); + memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); + + return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); +} + +static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) { return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) - + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) - + userpolicy_type_attrsize(); + + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) + + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) + + userpolicy_type_attrsize(); } static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, - int num_migrate, struct xfrm_selector *sel, - u8 dir, u8 type) + int num_migrate, struct xfrm_kmaddress *k, + struct xfrm_selector *sel, u8 dir, u8 type) { struct xfrm_migrate *mp; struct xfrm_userpolicy_id *pol_id; @@ -1731,6 +1871,9 @@ static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); pol_id->dir = dir; + if (k != NULL && (copy_to_user_kmaddress(k, skb) < 0)) + goto nlmsg_failure; + if (copy_to_user_policy_type(type, skb) < 0) goto nlmsg_failure; @@ -1746,23 +1889,26 @@ nlmsg_failure: } static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, - struct xfrm_migrate *m, int num_migrate) + struct xfrm_migrate *m, int num_migrate, + struct xfrm_kmaddress *k) { + struct net *net = &init_net; struct sk_buff *skb; - skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC); + skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; /* build migrate */ - if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) + if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); } #else static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, - struct xfrm_migrate *m, int num_migrate) + struct xfrm_migrate *m, int num_migrate, + struct xfrm_kmaddress *k) { return -ENOPROTOOPT; } @@ -1796,6 +1942,7 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { #undef XMSGSIZE static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { + [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, @@ -1810,20 +1957,24 @@ static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, + [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, }; static struct xfrm_link { int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); int (*dump)(struct sk_buff *, struct netlink_callback *); + int (*done)(struct netlink_callback *); } xfrm_dispatch[XFRM_NR_MSGTYPES] = { [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, - .dump = xfrm_dump_sa }, + .dump = xfrm_dump_sa, + .done = xfrm_dump_sa_done }, [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, - .dump = xfrm_dump_policy }, + .dump = xfrm_dump_policy, + .done = xfrm_dump_policy_done }, [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, @@ -1841,6 +1992,7 @@ static struct xfrm_link { static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { + struct net *net = sock_net(skb->sk); struct nlattr *attrs[XFRMA_MAX+1]; struct xfrm_link *link; int type, err; @@ -1862,7 +2014,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) if (link->dump == NULL) return -EINVAL; - return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); + return netlink_dump_start(net->xfrm.nlsk, skb, nlh, link->dump, link->done); } err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, @@ -1876,16 +2028,11 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) return link->doit(skb, nlh, attrs); } -static void xfrm_netlink_rcv(struct sock *sk, int len) +static void xfrm_netlink_rcv(struct sk_buff *skb) { - unsigned int qlen = 0; - - do { - mutex_lock(&xfrm_cfg_mutex); - qlen = netlink_run_queue(sk, qlen, &xfrm_user_rcv_msg); - mutex_unlock(&xfrm_cfg_mutex); - - } while (qlen); + mutex_lock(&xfrm_cfg_mutex); + netlink_rcv_skb(skb, &xfrm_user_rcv_msg); + mutex_unlock(&xfrm_cfg_mutex); } static inline size_t xfrm_expire_msgsize(void) @@ -1911,6 +2058,7 @@ static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_eve static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) { + struct net *net = xs_net(x); struct sk_buff *skb; skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); @@ -1920,11 +2068,12 @@ static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) if (build_expire(skb, x, c) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); } static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) { + struct net *net = xs_net(x); struct sk_buff *skb; skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); @@ -1934,11 +2083,12 @@ static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) if (build_aevent(skb, x, c) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); } static int xfrm_notify_sa_flush(struct km_event *c) { + struct net *net = c->net; struct xfrm_usersa_flush *p; struct nlmsghdr *nlh; struct sk_buff *skb; @@ -1959,26 +2109,37 @@ static int xfrm_notify_sa_flush(struct km_event *c) nlmsg_end(skb, nlh); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); } static inline size_t xfrm_sa_len(struct xfrm_state *x) { size_t l = 0; + if (x->aead) + l += nla_total_size(aead_len(x->aead)); if (x->aalg) - l += nla_total_size(alg_len(x->aalg)); + l += nla_total_size(xfrm_alg_len(x->aalg)); if (x->ealg) - l += nla_total_size(alg_len(x->ealg)); + l += nla_total_size(xfrm_alg_len(x->ealg)); if (x->calg) l += nla_total_size(sizeof(*x->calg)); if (x->encap) l += nla_total_size(sizeof(*x->encap)); + if (x->security) + l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + + x->security->ctx_len); + if (x->coaddr) + l += nla_total_size(sizeof(*x->coaddr)); + + /* Must count x->lastused as it may become non-zero behind our back. */ + l += nla_total_size(sizeof(u64)); return l; } static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) { + struct net *net = xs_net(x); struct xfrm_usersa_info *p; struct xfrm_usersa_id *id; struct nlmsghdr *nlh; @@ -2018,23 +2179,16 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) p = nla_data(attr); } - copy_to_user_state(x, p); - - if (x->aalg) - NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg); - if (x->ealg) - NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg); - if (x->calg) - NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); - - if (x->encap) - NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); + if (copy_to_user_state_extra(x, p, skb)) + goto nla_put_failure; nlmsg_end(skb, nlh); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); nla_put_failure: + /* Somebody screwed up with xfrm_sa_len! */ + WARN_ON(1); kfree_skb(skb); return -1; } @@ -2110,6 +2264,7 @@ nlmsg_failure: static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, struct xfrm_policy *xp, int dir) { + struct net *net = xs_net(x); struct sk_buff *skb; skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); @@ -2119,7 +2274,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, if (build_acquire(skb, x, xt, xp, dir) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); } /* User gives us xfrm_user_policy_info followed by an array of 0 @@ -2128,6 +2283,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, u8 *data, int len, int *dir) { + struct net *net = sock_net(sk); struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); struct xfrm_policy *xp; @@ -2166,7 +2322,7 @@ static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, if (p->dir > XFRM_POLICY_OUT) return NULL; - xp = xfrm_policy_alloc(GFP_KERNEL); + xp = xfrm_policy_alloc(net, GFP_KERNEL); if (xp == NULL) { *dir = -ENOBUFS; return NULL; @@ -2219,6 +2375,7 @@ nlmsg_failure: static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) { + struct net *net = xp_net(xp); struct sk_buff *skb; skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); @@ -2228,11 +2385,12 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_eve if (build_polexpire(skb, xp, dir, c) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); } static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) { + struct net *net = xp_net(xp); struct xfrm_userpolicy_info *p; struct xfrm_userpolicy_id *id; struct nlmsghdr *nlh; @@ -2283,7 +2441,7 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event * nlmsg_end(skb, nlh); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); nlmsg_failure: kfree_skb(skb); @@ -2292,6 +2450,7 @@ nlmsg_failure: static int xfrm_notify_policy_flush(struct km_event *c) { + struct net *net = c->net; struct nlmsghdr *nlh; struct sk_buff *skb; @@ -2307,7 +2466,7 @@ static int xfrm_notify_policy_flush(struct km_event *c) nlmsg_end(skb, nlh); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); nlmsg_failure: kfree_skb(skb); @@ -2363,8 +2522,8 @@ nla_put_failure: return -EMSGSIZE; } -static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, - xfrm_address_t *addr) +static int xfrm_send_report(struct net *net, u8 proto, + struct xfrm_selector *sel, xfrm_address_t *addr) { struct sk_buff *skb; @@ -2375,7 +2534,59 @@ static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, if (build_report(skb, proto, sel, addr) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); +} + +static inline size_t xfrm_mapping_msgsize(void) +{ + return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); +} + +static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, + xfrm_address_t *new_saddr, __be16 new_sport) +{ + struct xfrm_user_mapping *um; + struct nlmsghdr *nlh; + + nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); + if (nlh == NULL) + return -EMSGSIZE; + + um = nlmsg_data(nlh); + + memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); + um->id.spi = x->id.spi; + um->id.family = x->props.family; + um->id.proto = x->id.proto; + memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); + memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); + um->new_sport = new_sport; + um->old_sport = x->encap->encap_sport; + um->reqid = x->props.reqid; + + return nlmsg_end(skb, nlh); +} + +static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, + __be16 sport) +{ + struct net *net = xs_net(x); + struct sk_buff *skb; + + if (x->id.proto != IPPROTO_ESP) + return -EINVAL; + + if (!x->encap) + return -EINVAL; + + skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + + if (build_mapping(skb, x, ipaddr, sport) < 0) + BUG(); + + return nlmsg_multicast(net->xfrm.nlsk, skb, 0, XFRMNLGRP_MAPPING, GFP_ATOMIC); } static struct xfrm_mgr netlink_mgr = { @@ -2386,33 +2597,54 @@ static struct xfrm_mgr netlink_mgr = { .notify_policy = xfrm_send_policy_notify, .report = xfrm_send_report, .migrate = xfrm_send_migrate, + .new_mapping = xfrm_send_mapping, }; -static int __init xfrm_user_init(void) +static int __net_init xfrm_user_net_init(struct net *net) { struct sock *nlsk; - printk(KERN_INFO "Initializing XFRM netlink socket\n"); - - nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX, + nlsk = netlink_kernel_create(net, NETLINK_XFRM, XFRMNLGRP_MAX, xfrm_netlink_rcv, NULL, THIS_MODULE); if (nlsk == NULL) return -ENOMEM; - rcu_assign_pointer(xfrm_nl, nlsk); + rcu_assign_pointer(net->xfrm.nlsk, nlsk); + return 0; +} - xfrm_register_km(&netlink_mgr); +static void __net_exit xfrm_user_net_exit(struct net *net) +{ + struct sock *nlsk = net->xfrm.nlsk; - return 0; + rcu_assign_pointer(net->xfrm.nlsk, NULL); + synchronize_rcu(); + netlink_kernel_release(nlsk); } -static void __exit xfrm_user_exit(void) +static struct pernet_operations xfrm_user_net_ops = { + .init = xfrm_user_net_init, + .exit = xfrm_user_net_exit, +}; + +static int __init xfrm_user_init(void) { - struct sock *nlsk = xfrm_nl; + int rv; + + printk(KERN_INFO "Initializing XFRM netlink socket\n"); + + rv = register_pernet_subsys(&xfrm_user_net_ops); + if (rv < 0) + return rv; + rv = xfrm_register_km(&netlink_mgr); + if (rv < 0) + unregister_pernet_subsys(&xfrm_user_net_ops); + return rv; +} +static void __exit xfrm_user_exit(void) +{ xfrm_unregister_km(&netlink_mgr); - rcu_assign_pointer(xfrm_nl, NULL); - synchronize_rcu(); - sock_release(nlsk->sk_socket); + unregister_pernet_subsys(&xfrm_user_net_ops); } module_init(xfrm_user_init);