diff options
author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-12 06:40:14 +0400 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-12 06:40:14 +0400 |
commit | 038a5008b2f395c85e6e71d6ddf3c684e7c405b0 (patch) | |
tree | 4735eab577e97e5a22c3141e3f60071c8065585e /net/xfrm/xfrm_user.c | |
parent | dd6d1844af33acb4edd0a40b1770d091a22c94be (diff) | |
parent | 266918303226cceac7eca38ced30f15f277bd89c (diff) | |
download | linux-038a5008b2f395c85e6e71d6ddf3c684e7c405b0.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (867 commits)
[SKY2]: status polling loop (post merge)
[NET]: Fix NAPI completion handling in some drivers.
[TCP]: Limit processing lost_retrans loop to work-to-do cases
[TCP]: Fix lost_retrans loop vs fastpath problems
[TCP]: No need to re-count fackets_out/sacked_out at RTO
[TCP]: Extract tcp_match_queue_to_sack from sacktag code
[TCP]: Kill almost unused variable pcount from sacktag
[TCP]: Fix mark_head_lost to ignore R-bit when trying to mark L
[TCP]: Add bytes_acked (ABC) clearing to FRTO too
[IPv6]: Update setsockopt(IPV6_MULTICAST_IF) to support RFC 3493, try2
[NETFILTER]: x_tables: add missing ip6t_modulename aliases
[NETFILTER]: nf_conntrack_tcp: fix connection reopening
[QETH]: fix qeth_main.c
[NETLINK]: fib_frontend build fixes
[IPv6]: Export userland ND options through netlink (RDNSS support)
[9P]: build fix with !CONFIG_SYSCTL
[NET]: Fix dev_put() and dev_hold() comments
[NET]: make netlink user -> kernel interface synchronious
[NET]: unify netlink kernel socket recognition
[NET]: cleanup 3rd argument in netlink_sendskb
...
Fix up conflicts manually in Documentation/feature-removal-schedule.txt
and my new least favourite crap, the "mod_devicetable" support in the
files include/linux/mod_devicetable.h and scripts/mod/file2alias.c.
(The latter files seem to be explicitly _designed_ to get conflicts when
different subsystems work with them - that have an absolutely horrid
lack of subsystem separation!)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'net/xfrm/xfrm_user.c')
-rw-r--r-- | net/xfrm/xfrm_user.c | 1135 |
1 files changed, 489 insertions, 646 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 61339e17a0f5..d41588d101d0 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -19,7 +19,6 @@ #include <linux/string.h> #include <linux/net.h> #include <linux/skbuff.h> -#include <linux/rtnetlink.h> #include <linux/pfkeyv2.h> #include <linux/ipsec.h> #include <linux/init.h> @@ -31,25 +30,22 @@ #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) #include <linux/in6.h> #endif -#include <linux/audit.h> -static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) +static inline int alg_len(struct xfrm_algo *alg) { - struct rtattr *rt = xfrma[type - 1]; + return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); +} + +static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) +{ + struct nlattr *rt = attrs[type]; struct xfrm_algo *algp; - int len; if (!rt) return 0; - len = (rt->rta_len - sizeof(*rt)) - sizeof(*algp); - if (len < 0) - return -EINVAL; - - algp = RTA_DATA(rt); - - len -= (algp->alg_key_len + 7U) / 8; - if (len < 0) + algp = nla_data(rt); + if (nla_len(rt) < alg_len(algp)) return -EINVAL; switch (type) { @@ -77,55 +73,25 @@ static int verify_one_alg(struct rtattr **xfrma, enum xfrm_attr_type_t type) return 0; } -static int verify_encap_tmpl(struct rtattr **xfrma) -{ - struct rtattr *rt = xfrma[XFRMA_ENCAP - 1]; - struct xfrm_encap_tmpl *encap; - - if (!rt) - return 0; - - if ((rt->rta_len - sizeof(*rt)) < sizeof(*encap)) - return -EINVAL; - - return 0; -} - -static int verify_one_addr(struct rtattr **xfrma, enum xfrm_attr_type_t type, +static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type, xfrm_address_t **addrp) { - struct rtattr *rt = xfrma[type - 1]; - - if (!rt) - return 0; - - if ((rt->rta_len - sizeof(*rt)) < sizeof(**addrp)) - return -EINVAL; - - if (addrp) - *addrp = RTA_DATA(rt); + struct nlattr *rt = attrs[type]; - return 0; + if (rt && addrp) + *addrp = nla_data(rt); } -static inline int verify_sec_ctx_len(struct rtattr **xfrma) +static inline int verify_sec_ctx_len(struct nlattr **attrs) { - struct rtattr *rt = xfrma[XFRMA_SEC_CTX - 1]; + struct nlattr *rt = attrs[XFRMA_SEC_CTX]; struct xfrm_user_sec_ctx *uctx; - int len = 0; if (!rt) return 0; - if (rt->rta_len < sizeof(*uctx)) - return -EINVAL; - - uctx = RTA_DATA(rt); - - len += sizeof(struct xfrm_user_sec_ctx); - len += uctx->ctx_len; - - if (uctx->len != len) + uctx = nla_data(rt); + if (uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) return -EINVAL; return 0; @@ -133,7 +99,7 @@ static inline int verify_sec_ctx_len(struct rtattr **xfrma) static int verify_newsa_info(struct xfrm_usersa_info *p, - struct rtattr **xfrma) + struct nlattr **attrs) { int err; @@ -157,35 +123,35 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, err = -EINVAL; switch (p->id.proto) { case IPPROTO_AH: - if (!xfrma[XFRMA_ALG_AUTH-1] || - xfrma[XFRMA_ALG_CRYPT-1] || - xfrma[XFRMA_ALG_COMP-1]) + if (!attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_CRYPT] || + attrs[XFRMA_ALG_COMP]) goto out; break; case IPPROTO_ESP: - if ((!xfrma[XFRMA_ALG_AUTH-1] && - !xfrma[XFRMA_ALG_CRYPT-1]) || - xfrma[XFRMA_ALG_COMP-1]) + if ((!attrs[XFRMA_ALG_AUTH] && + !attrs[XFRMA_ALG_CRYPT]) || + attrs[XFRMA_ALG_COMP]) goto out; break; case IPPROTO_COMP: - if (!xfrma[XFRMA_ALG_COMP-1] || - xfrma[XFRMA_ALG_AUTH-1] || - xfrma[XFRMA_ALG_CRYPT-1]) + if (!attrs[XFRMA_ALG_COMP] || + attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_CRYPT]) goto out; break; #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) case IPPROTO_DSTOPTS: case IPPROTO_ROUTING: - if (xfrma[XFRMA_ALG_COMP-1] || - xfrma[XFRMA_ALG_AUTH-1] || - xfrma[XFRMA_ALG_CRYPT-1] || - xfrma[XFRMA_ENCAP-1] || - xfrma[XFRMA_SEC_CTX-1] || - !xfrma[XFRMA_COADDR-1]) + if (attrs[XFRMA_ALG_COMP] || + attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_CRYPT] || + attrs[XFRMA_ENCAP] || + attrs[XFRMA_SEC_CTX] || + !attrs[XFRMA_COADDR]) goto out; break; #endif @@ -194,17 +160,13 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, goto out; } - if ((err = verify_one_alg(xfrma, XFRMA_ALG_AUTH))) - goto out; - if ((err = verify_one_alg(xfrma, XFRMA_ALG_CRYPT))) - goto out; - if ((err = verify_one_alg(xfrma, XFRMA_ALG_COMP))) + if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) goto out; - if ((err = verify_encap_tmpl(xfrma))) + if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) goto out; - if ((err = verify_sec_ctx_len(xfrma))) + if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP))) goto out; - if ((err = verify_one_addr(xfrma, XFRMA_COADDR, NULL))) + if ((err = verify_sec_ctx_len(attrs))) goto out; err = -EINVAL; @@ -227,25 +189,22 @@ out: static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, struct xfrm_algo_desc *(*get_byname)(char *, int), - struct rtattr *u_arg) + struct nlattr *rta) { - struct rtattr *rta = u_arg; struct xfrm_algo *p, *ualg; struct xfrm_algo_desc *algo; - int len; if (!rta) return 0; - ualg = RTA_DATA(rta); + ualg = nla_data(rta); algo = get_byname(ualg->alg_name, 1); if (!algo) return -ENOSYS; *props = algo->desc.sadb_alg_id; - len = sizeof(*ualg) + (ualg->alg_key_len + 7U) / 8; - p = kmemdup(ualg, len, GFP_KERNEL); + p = kmemdup(ualg, alg_len(ualg), GFP_KERNEL); if (!p) return -ENOMEM; @@ -254,24 +213,6 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, return 0; } -static int attach_encap_tmpl(struct xfrm_encap_tmpl **encapp, struct rtattr *u_arg) -{ - struct rtattr *rta = u_arg; - struct xfrm_encap_tmpl *p, *uencap; - - if (!rta) - return 0; - - uencap = RTA_DATA(rta); - p = kmemdup(uencap, sizeof(*p), GFP_KERNEL); - if (!p) - return -ENOMEM; - - *encapp = p; - return 0; -} - - static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) { int len = 0; @@ -283,34 +224,6 @@ static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) return len; } -static int attach_sec_ctx(struct xfrm_state *x, struct rtattr *u_arg) -{ - struct xfrm_user_sec_ctx *uctx; - - if (!u_arg) - return 0; - - uctx = RTA_DATA(u_arg); - return security_xfrm_state_alloc(x, uctx); -} - -static int attach_one_addr(xfrm_address_t **addrpp, struct rtattr *u_arg) -{ - struct rtattr *rta = u_arg; - xfrm_address_t *p, *uaddrp; - - if (!rta) - return 0; - - uaddrp = RTA_DATA(rta); - p = kmemdup(uaddrp, sizeof(*p), GFP_KERNEL); - if (!p) - return -ENOMEM; - - *addrpp = p; - return 0; -} - static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) { memcpy(&x->id, &p->id, sizeof(x->id)); @@ -336,53 +249,38 @@ static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info * * somehow made shareable and move it to xfrm_state.c - JHS * */ -static int xfrm_update_ae_params(struct xfrm_state *x, struct rtattr **xfrma) +static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) { - int err = - EINVAL; - struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; - struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; - struct rtattr *et = xfrma[XFRMA_ETIMER_THRESH-1]; - struct rtattr *rt = xfrma[XFRMA_REPLAY_THRESH-1]; + struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; + struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; + struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; + struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; if (rp) { struct xfrm_replay_state *replay; - if (RTA_PAYLOAD(rp) < sizeof(*replay)) - goto error; - replay = RTA_DATA(rp); + replay = nla_data(rp); memcpy(&x->replay, replay, sizeof(*replay)); memcpy(&x->preplay, replay, sizeof(*replay)); } if (lt) { struct xfrm_lifetime_cur *ltime; - if (RTA_PAYLOAD(lt) < sizeof(*ltime)) - goto error; - ltime = RTA_DATA(lt); + ltime = nla_data(lt); x->curlft.bytes = ltime->bytes; x->curlft.packets = ltime->packets; x->curlft.add_time = ltime->add_time; x->curlft.use_time = ltime->use_time; } - if (et) { - if (RTA_PAYLOAD(et) < sizeof(u32)) - goto error; - x->replay_maxage = *(u32*)RTA_DATA(et); - } - - if (rt) { - if (RTA_PAYLOAD(rt) < sizeof(u32)) - goto error; - x->replay_maxdiff = *(u32*)RTA_DATA(rt); - } + if (et) + x->replay_maxage = nla_get_u32(et); - return 0; -error: - return err; + if (rt) + x->replay_maxdiff = nla_get_u32(rt); } static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, - struct rtattr **xfrma, + struct nlattr **attrs, int *errp) { struct xfrm_state *x = xfrm_state_alloc(); @@ -395,25 +293,37 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, xfrm_aalg_get_byname, - xfrma[XFRMA_ALG_AUTH-1]))) + attrs[XFRMA_ALG_AUTH]))) goto error; if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, xfrm_ealg_get_byname, - xfrma[XFRMA_ALG_CRYPT-1]))) + attrs[XFRMA_ALG_CRYPT]))) goto error; if ((err = attach_one_algo(&x->calg, &x->props.calgo, xfrm_calg_get_byname, - xfrma[XFRMA_ALG_COMP-1]))) - goto error; - if ((err = attach_encap_tmpl(&x->encap, xfrma[XFRMA_ENCAP-1]))) - goto error; - if ((err = attach_one_addr(&x->coaddr, xfrma[XFRMA_COADDR-1]))) + attrs[XFRMA_ALG_COMP]))) goto error; + + if (attrs[XFRMA_ENCAP]) { + x->encap = kmemdup(nla_data(attrs[XFRMA_ENCAP]), + sizeof(*x->encap), GFP_KERNEL); + if (x->encap == NULL) + goto error; + } + + if (attrs[XFRMA_COADDR]) { + x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), + sizeof(*x->coaddr), GFP_KERNEL); + if (x->coaddr == NULL) + goto error; + } + err = xfrm_init_state(x); if (err) goto error; - if ((err = attach_sec_ctx(x, xfrma[XFRMA_SEC_CTX-1]))) + if (attrs[XFRMA_SEC_CTX] && + security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) goto error; x->km.seq = p->seq; @@ -426,9 +336,7 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, /* override default values from above */ - err = xfrm_update_ae_params(x, (struct rtattr **)xfrma); - if (err < 0) - goto error; + xfrm_update_ae_params(x, attrs); return x; @@ -441,18 +349,18 @@ error_no_put: } static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { - struct xfrm_usersa_info *p = NLMSG_DATA(nlh); + struct xfrm_usersa_info *p = nlmsg_data(nlh); struct xfrm_state *x; int err; struct km_event c; - err = verify_newsa_info(p, xfrma); + err = verify_newsa_info(p, attrs); if (err) return err; - x = xfrm_state_construct(p, xfrma, &err); + x = xfrm_state_construct(p, attrs, &err); if (!x) return err; @@ -462,8 +370,8 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, else err = xfrm_state_update(x); - xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, - AUDIT_MAC_IPSEC_ADDSA, err ? 0 : 1, NULL, x); + xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, + NETLINK_CB(skb).sid); if (err < 0) { x->km.state = XFRM_STATE_DEAD; @@ -482,7 +390,7 @@ out: } static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, - struct rtattr **xfrma, + struct nlattr **attrs, int *errp) { struct xfrm_state *x = NULL; @@ -494,10 +402,7 @@ static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, } else { xfrm_address_t *saddr = NULL; - err = verify_one_addr(xfrma, XFRMA_SRCADDR, &saddr); - if (err) - goto out; - + verify_one_addr(attrs, XFRMA_SRCADDR, &saddr); if (!saddr) { err = -EINVAL; goto out; @@ -515,14 +420,14 @@ 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 rtattr **xfrma) + struct nlattr **attrs) { struct xfrm_state *x; int err = -ESRCH; struct km_event c; - struct xfrm_usersa_id *p = NLMSG_DATA(nlh); + struct xfrm_usersa_id *p = nlmsg_data(nlh); - x = xfrm_user_state_lookup(p, xfrma, &err); + x = xfrm_user_state_lookup(p, attrs, &err); if (x == NULL) return err; @@ -545,8 +450,8 @@ static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, km_state_notify(x, &c); out: - xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, - AUDIT_MAC_IPSEC_DELSA, err ? 0 : 1, NULL, x); + xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, + NETLINK_CB(skb).sid); xfrm_state_put(x); return err; } @@ -576,67 +481,92 @@ struct xfrm_dump_info { int this_idx; }; -static int dump_one_state(struct xfrm_state *x, int count, void *ptr) +static int copy_sec_ctx(struct xfrm_sec_ctx *s, 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; - unsigned char *b = skb_tail_pointer(skb); + struct xfrm_user_sec_ctx *uctx; + struct nlattr *attr; + int ctx_size = sizeof(*uctx) + s->ctx_len; - if (sp->this_idx < sp->start_idx) - goto out; + attr = nla_reserve(skb, XFRMA_SEC_CTX, ctx_size); + if (attr == NULL) + return -EMSGSIZE; + + uctx = nla_data(attr); + uctx->exttype = XFRMA_SEC_CTX; + uctx->len = ctx_size; + uctx->ctx_doi = s->ctx_doi; + uctx->ctx_alg = s->ctx_alg; + uctx->ctx_len = s->ctx_len; + memcpy(uctx + 1, s->ctx_str, s->ctx_len); - nlh = NLMSG_PUT(skb, NETLINK_CB(in_skb).pid, - sp->nlmsg_seq, - XFRM_MSG_NEWSA, sizeof(*p)); - nlh->nlmsg_flags = sp->nlmsg_flags; + return 0; +} - p = NLMSG_DATA(nlh); +/* 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) +{ + spin_lock_bh(&x->lock); copy_to_user_state(x, p); + if (x->coaddr) + NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); + + if (x->lastused) + NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); + spin_unlock_bh(&x->lock); + if (x->aalg) - RTA_PUT(skb, XFRMA_ALG_AUTH, - sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); + NLA_PUT(skb, XFRMA_ALG_AUTH, alg_len(x->aalg), x->aalg); if (x->ealg) - RTA_PUT(skb, XFRMA_ALG_CRYPT, - sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); + NLA_PUT(skb, XFRMA_ALG_CRYPT, alg_len(x->ealg), x->ealg); if (x->calg) - RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); + NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); if (x->encap) - RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); + NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); - if (x->security) { - int ctx_size = sizeof(struct xfrm_sec_ctx) + - x->security->ctx_len; - struct rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); - struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); - - uctx->exttype = XFRMA_SEC_CTX; - uctx->len = ctx_size; - uctx->ctx_doi = x->security->ctx_doi; - uctx->ctx_alg = x->security->ctx_alg; - uctx->ctx_len = x->security->ctx_len; - memcpy(uctx + 1, x->security->ctx_str, x->security->ctx_len); - } + if (x->security && copy_sec_ctx(x->security, skb) < 0) + goto nla_put_failure; - if (x->coaddr) - RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); + return 0; - if (x->lastused) - RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused); +nla_put_failure: + return -EMSGSIZE; +} - nlh->nlmsg_len = skb_tail_pointer(skb) - b; +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; + + if (sp->this_idx < sp->start_idx) + goto out; + + 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; -nlmsg_failure: -rtattr_failure: - nlmsg_trim(skb, b); - return -1; +nla_put_failure: + nlmsg_cancel(skb, nlh); + return err; } static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) @@ -661,7 +591,7 @@ static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, struct xfrm_dump_info info; struct sk_buff *skb; - skb = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); + skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!skb) return ERR_PTR(-ENOMEM); @@ -679,6 +609,13 @@ static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, return skb; } +static inline size_t xfrm_spdinfo_msgsize(void) +{ + return NLMSG_ALIGN(4) + + nla_total_size(sizeof(struct xfrmu_spdinfo)) + + nla_total_size(sizeof(struct xfrmu_spdhinfo)); +} + static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) { struct xfrmk_spdinfo si; @@ -714,18 +651,14 @@ nla_put_failure: } static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct sk_buff *r_skb; - u32 *flags = NLMSG_DATA(nlh); + u32 *flags = nlmsg_data(nlh); u32 spid = NETLINK_CB(skb).pid; u32 seq = nlh->nlmsg_seq; - int len = NLMSG_LENGTH(sizeof(u32)); - len += RTA_SPACE(sizeof(struct xfrmu_spdinfo)); - len += RTA_SPACE(sizeof(struct xfrmu_spdhinfo)); - - r_skb = alloc_skb(len, GFP_ATOMIC); + r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); if (r_skb == NULL) return -ENOMEM; @@ -735,6 +668,13 @@ static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, return nlmsg_unicast(xfrm_nl, r_skb, spid); } +static inline size_t xfrm_sadinfo_msgsize(void) +{ + return NLMSG_ALIGN(4) + + nla_total_size(sizeof(struct xfrmu_sadhinfo)) + + nla_total_size(4); /* XFRMA_SAD_CNT */ +} + static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) { struct xfrmk_sadinfo si; @@ -764,19 +704,14 @@ nla_put_failure: } static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct sk_buff *r_skb; - u32 *flags = NLMSG_DATA(nlh); + u32 *flags = nlmsg_data(nlh); u32 spid = NETLINK_CB(skb).pid; u32 seq = nlh->nlmsg_seq; - int len = NLMSG_LENGTH(sizeof(u32)); - - len += RTA_SPACE(sizeof(struct xfrmu_sadhinfo)); - len += RTA_SPACE(sizeof(u32)); - - r_skb = alloc_skb(len, GFP_ATOMIC); + r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); if (r_skb == NULL) return -ENOMEM; @@ -787,14 +722,14 @@ static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, } static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { - struct xfrm_usersa_id *p = NLMSG_DATA(nlh); + 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, xfrma, &err); + x = xfrm_user_state_lookup(p, attrs, &err); if (x == NULL) goto out_noput; @@ -802,8 +737,7 @@ static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); } else { - err = netlink_unicast(xfrm_nl, resp_skb, - NETLINK_CB(skb).pid, MSG_DONTWAIT); + err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); } xfrm_state_put(x); out_noput: @@ -834,7 +768,7 @@ static int verify_userspi_info(struct xfrm_userspi_info *p) } static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct xfrm_state *x; struct xfrm_userspi_info *p; @@ -843,7 +777,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, int family; int err; - p = NLMSG_DATA(nlh); + p = nlmsg_data(nlh); err = verify_userspi_info(p); if (err) goto out_noput; @@ -869,23 +803,17 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, if (x == NULL) goto out_noput; - resp_skb = ERR_PTR(-ENOENT); - - spin_lock_bh(&x->lock); - if (x->km.state != XFRM_STATE_DEAD) { - xfrm_alloc_spi(x, htonl(p->min), htonl(p->max)); - if (x->id.spi) - resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); - } - spin_unlock_bh(&x->lock); + err = xfrm_alloc_spi(x, p->min, p->max); + if (err) + goto out; + resp_skb = xfrm_state_netlink(skb, x, nlh->nlmsg_seq); if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); goto out; } - err = netlink_unicast(xfrm_nl, resp_skb, - NETLINK_CB(skb).pid, MSG_DONTWAIT); + err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); out: xfrm_state_put(x); @@ -964,15 +892,15 @@ static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) return verify_policy_dir(p->dir); } -static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct rtattr **xfrma) +static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) { - struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; + struct nlattr *rt = attrs[XFRMA_SEC_CTX]; struct xfrm_user_sec_ctx *uctx; if (!rt) return 0; - uctx = RTA_DATA(rt); + uctx = nla_data(rt); return security_xfrm_policy_alloc(pol, uctx); } @@ -1032,38 +960,35 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) return 0; } -static int copy_from_user_tmpl(struct xfrm_policy *pol, struct rtattr **xfrma) +static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs) { - struct rtattr *rt = xfrma[XFRMA_TMPL-1]; + struct nlattr *rt = attrs[XFRMA_TMPL]; if (!rt) { pol->xfrm_nr = 0; } else { - struct xfrm_user_tmpl *utmpl = RTA_DATA(rt); - int nr = (rt->rta_len - sizeof(*rt)) / sizeof(*utmpl); + struct xfrm_user_tmpl *utmpl = nla_data(rt); + int nr = nla_len(rt) / sizeof(*utmpl); int err; err = validate_tmpl(nr, utmpl, pol->family); if (err) return err; - copy_templates(pol, RTA_DATA(rt), nr); + copy_templates(pol, utmpl, nr); } return 0; } -static int copy_from_user_policy_type(u8 *tp, struct rtattr **xfrma) +static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs) { - struct rtattr *rt = xfrma[XFRMA_POLICY_TYPE-1]; + struct nlattr *rt = attrs[XFRMA_POLICY_TYPE]; struct xfrm_userpolicy_type *upt; u8 type = XFRM_POLICY_TYPE_MAIN; int err; if (rt) { - if (rt->rta_len < sizeof(*upt)) - return -EINVAL; - - upt = RTA_DATA(rt); + upt = nla_data(rt); type = upt->type; } @@ -1101,7 +1026,7 @@ 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 rtattr **xfrma, int *errp) +static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp) { struct xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); int err; @@ -1113,12 +1038,12 @@ static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, copy_from_user_policy(xp, p); - err = copy_from_user_policy_type(&xp->type, xfrma); + err = copy_from_user_policy_type(&xp->type, attrs); if (err) goto error; - if (!(err = copy_from_user_tmpl(xp, xfrma))) - err = copy_from_user_sec_ctx(xp, xfrma); + if (!(err = copy_from_user_tmpl(xp, attrs))) + err = copy_from_user_sec_ctx(xp, attrs); if (err) goto error; @@ -1130,9 +1055,9 @@ static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, } static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { - struct xfrm_userpolicy_info *p = NLMSG_DATA(nlh); + struct xfrm_userpolicy_info *p = nlmsg_data(nlh); struct xfrm_policy *xp; struct km_event c; int err; @@ -1141,11 +1066,11 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, err = verify_newpolicy_info(p); if (err) return err; - err = verify_sec_ctx_len(xfrma); + err = verify_sec_ctx_len(attrs); if (err) return err; - xp = xfrm_policy_construct(p, xfrma, &err); + xp = xfrm_policy_construct(p, attrs, &err); if (!xp) return err; @@ -1155,8 +1080,8 @@ 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_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, - AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); + xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid, + NETLINK_CB(skb).sid); if (err) { security_xfrm_policy_free(xp); @@ -1197,32 +1122,9 @@ static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) up->ealgos = kp->ealgos; up->calgos = kp->calgos; } - RTA_PUT(skb, XFRMA_TMPL, - (sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr), - vec); - return 0; - -rtattr_failure: - return -1; -} - -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 rtattr *rt = __RTA_PUT(skb, XFRMA_SEC_CTX, ctx_size); - struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); - - uctx->exttype = XFRMA_SEC_CTX; - uctx->len = ctx_size; - uctx->ctx_doi = s->ctx_doi; - uctx->ctx_alg = s->ctx_alg; - uctx->ctx_len = s->ctx_len; - memcpy(uctx + 1, s->ctx_str, s->ctx_len); - return 0; - - rtattr_failure: - return -1; + return nla_put(skb, XFRMA_TMPL, + sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr, vec); } static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buff *skb) @@ -1240,21 +1142,23 @@ static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *s } return 0; } +static inline size_t userpolicy_type_attrsize(void) +{ +#ifdef CONFIG_XFRM_SUB_POLICY + return nla_total_size(sizeof(struct xfrm_userpolicy_type)); +#else + return 0; +#endif +} #ifdef CONFIG_XFRM_SUB_POLICY static int copy_to_user_policy_type(u8 type, struct sk_buff *skb) { - struct xfrm_userpolicy_type upt; - - memset(&upt, 0, sizeof(upt)); - upt.type = type; - - RTA_PUT(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); + struct xfrm_userpolicy_type upt = { + .type = type, + }; - return 0; - -rtattr_failure: - return -1; + return nla_put(skb, XFRMA_POLICY_TYPE, sizeof(upt), &upt); } #else @@ -1271,17 +1175,16 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr struct sk_buff *in_skb = sp->in_skb; struct sk_buff *skb = sp->out_skb; struct nlmsghdr *nlh; - unsigned char *b = skb_tail_pointer(skb); 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)); - p = NLMSG_DATA(nlh); - nlh->nlmsg_flags = sp->nlmsg_flags; + nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, + XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); + if (nlh == NULL) + return -EMSGSIZE; + p = nlmsg_data(nlh); copy_to_user_policy(xp, p, dir); if (copy_to_user_tmpl(xp, skb) < 0) goto nlmsg_failure; @@ -1290,14 +1193,14 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr if (copy_to_user_policy_type(xp->type, skb) < 0) goto nlmsg_failure; - nlh->nlmsg_len = skb_tail_pointer(skb) - b; + nlmsg_end(skb, nlh); out: sp->this_idx++; return 0; nlmsg_failure: - nlmsg_trim(skb, b); - return -1; + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; } static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) @@ -1326,7 +1229,7 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, struct xfrm_dump_info info; struct sk_buff *skb; - skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL); + skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) return ERR_PTR(-ENOMEM); @@ -1345,7 +1248,7 @@ 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 rtattr **xfrma) + struct nlattr **attrs) { struct xfrm_policy *xp; struct xfrm_userpolicy_id *p; @@ -1354,10 +1257,10 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct km_event c; int delete; - p = NLMSG_DATA(nlh); + p = nlmsg_data(nlh); delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; - err = copy_from_user_policy_type(&type, xfrma); + err = copy_from_user_policy_type(&type, attrs); if (err) return err; @@ -1368,16 +1271,16 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, if (p->index) xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); else { - struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; + struct nlattr *rt = attrs[XFRMA_SEC_CTX]; struct xfrm_policy tmp; - err = verify_sec_ctx_len(xfrma); + err = verify_sec_ctx_len(attrs); if (err) return err; memset(&tmp, 0, sizeof(struct xfrm_policy)); if (rt) { - struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); + struct xfrm_user_sec_ctx *uctx = nla_data(rt); if ((err = security_xfrm_policy_alloc(&tmp, uctx))) return err; @@ -1396,13 +1299,13 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); } else { - err = netlink_unicast(xfrm_nl, resp_skb, - NETLINK_CB(skb).pid, - MSG_DONTWAIT); + err = nlmsg_unicast(xfrm_nl, resp_skb, + NETLINK_CB(skb).pid); } } else { - xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, - AUDIT_MAC_IPSEC_DELSPD, err ? 0 : 1, xp, NULL); + xfrm_audit_policy_delete(xp, err ? 0 : 1, + NETLINK_CB(skb).loginuid, + NETLINK_CB(skb).sid); if (err != 0) goto out; @@ -1420,10 +1323,10 @@ out: } static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct km_event c; - struct xfrm_usersa_flush *p = NLMSG_DATA(nlh); + struct xfrm_usersa_flush *p = nlmsg_data(nlh); struct xfrm_audit audit_info; int err; @@ -1441,18 +1344,25 @@ static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, return 0; } +static inline size_t xfrm_aevent_msgsize(void) +{ + return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) + + nla_total_size(sizeof(struct xfrm_replay_state)) + + nla_total_size(sizeof(struct xfrm_lifetime_cur)) + + nla_total_size(4) /* XFRM_AE_RTHR */ + + nla_total_size(4); /* XFRM_AE_ETHR */ +} static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) { struct xfrm_aevent_id *id; struct nlmsghdr *nlh; - struct xfrm_lifetime_cur ltime; - unsigned char *b = skb_tail_pointer(skb); - nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id)); - id = NLMSG_DATA(nlh); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); + if (nlh == NULL) + return -EMSGSIZE; + id = nlmsg_data(nlh); memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); id->sa_id.spi = x->id.spi; id->sa_id.family = x->props.family; @@ -1461,54 +1371,34 @@ static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_eve id->reqid = x->props.reqid; id->flags = c->data.aevent; - RTA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); + NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); + NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); - ltime.bytes = x->curlft.bytes; - ltime.packets = x->curlft.packets; - ltime.add_time = x->curlft.add_time; - ltime.use_time = x->curlft.use_time; + if (id->flags & XFRM_AE_RTHR) + NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); - RTA_PUT(skb, XFRMA_LTIME_VAL, sizeof(struct xfrm_lifetime_cur), <ime); + if (id->flags & XFRM_AE_ETHR) + NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, + x->replay_maxage * 10 / HZ); - if (id->flags&XFRM_AE_RTHR) { - RTA_PUT(skb,XFRMA_REPLAY_THRESH,sizeof(u32),&x->replay_maxdiff); - } - - if (id->flags&XFRM_AE_ETHR) { - u32 etimer = x->replay_maxage*10/HZ; - RTA_PUT(skb,XFRMA_ETIMER_THRESH,sizeof(u32),&etimer); - } - - nlh->nlmsg_len = skb_tail_pointer(skb) - b; - return skb->len; + return nlmsg_end(skb, nlh); -rtattr_failure: -nlmsg_failure: - nlmsg_trim(skb, b); - return -1; +nla_put_failure: + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; } static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct xfrm_state *x; struct sk_buff *r_skb; int err; struct km_event c; - struct xfrm_aevent_id *p = NLMSG_DATA(nlh); - int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); + struct xfrm_aevent_id *p = nlmsg_data(nlh); struct xfrm_usersa_id *id = &p->sa_id; - len += RTA_SPACE(sizeof(struct xfrm_replay_state)); - len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); - - if (p->flags&XFRM_AE_RTHR) - len+=RTA_SPACE(sizeof(u32)); - - if (p->flags&XFRM_AE_ETHR) - len+=RTA_SPACE(sizeof(u32)); - - r_skb = alloc_skb(len, GFP_ATOMIC); + r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); if (r_skb == NULL) return -ENOMEM; @@ -1530,22 +1420,21 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, if (build_aevent(r_skb, x, &c) < 0) BUG(); - err = netlink_unicast(xfrm_nl, r_skb, - NETLINK_CB(skb).pid, MSG_DONTWAIT); + err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid); spin_unlock_bh(&x->lock); xfrm_state_put(x); return err; } static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct xfrm_state *x; struct km_event c; int err = - EINVAL; - struct xfrm_aevent_id *p = NLMSG_DATA(nlh); - struct rtattr *rp = xfrma[XFRMA_REPLAY_VAL-1]; - struct rtattr *lt = xfrma[XFRMA_LTIME_VAL-1]; + struct xfrm_aevent_id *p = nlmsg_data(nlh); + struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; + struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; if (!lt && !rp) return err; @@ -1562,10 +1451,8 @@ static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh, goto out; spin_lock_bh(&x->lock); - err = xfrm_update_ae_params(x, xfrma); + xfrm_update_ae_params(x, attrs); spin_unlock_bh(&x->lock); - if (err < 0) - goto out; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; @@ -1579,14 +1466,14 @@ out: } static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct km_event c; u8 type = XFRM_POLICY_TYPE_MAIN; int err; struct xfrm_audit audit_info; - err = copy_from_user_policy_type(&type, xfrma); + err = copy_from_user_policy_type(&type, attrs); if (err) return err; @@ -1604,31 +1491,31 @@ 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 rtattr **xfrma) + struct nlattr **attrs) { struct xfrm_policy *xp; - struct xfrm_user_polexpire *up = NLMSG_DATA(nlh); + struct xfrm_user_polexpire *up = nlmsg_data(nlh); struct xfrm_userpolicy_info *p = &up->pol; u8 type = XFRM_POLICY_TYPE_MAIN; int err = -ENOENT; - err = copy_from_user_policy_type(&type, xfrma); + err = copy_from_user_policy_type(&type, attrs); if (err) return err; if (p->index) xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); else { - struct rtattr *rt = xfrma[XFRMA_SEC_CTX-1]; + struct nlattr *rt = attrs[XFRMA_SEC_CTX]; struct xfrm_policy tmp; - err = verify_sec_ctx_len(xfrma); + err = verify_sec_ctx_len(attrs); if (err) return err; memset(&tmp, 0, sizeof(struct xfrm_policy)); if (rt) { - struct xfrm_user_sec_ctx *uctx = RTA_DATA(rt); + struct xfrm_user_sec_ctx *uctx = nla_data(rt); if ((err = security_xfrm_policy_alloc(&tmp, uctx))) return err; @@ -1650,8 +1537,8 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh, err = 0; if (up->hard) { xfrm_policy_delete(xp, p->dir); - xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, - AUDIT_MAC_IPSEC_DELSPD, 1, xp, NULL); + xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid, + NETLINK_CB(skb).sid); } else { // reset the timers here? @@ -1665,11 +1552,11 @@ out: } static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct xfrm_state *x; int err; - struct xfrm_user_expire *ue = NLMSG_DATA(nlh); + 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); @@ -1686,8 +1573,8 @@ static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, if (ue->hard) { __xfrm_state_delete(x); - xfrm_audit_log(NETLINK_CB(skb).loginuid, NETLINK_CB(skb).sid, - AUDIT_MAC_IPSEC_DELSA, 1, NULL, x); + xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid, + NETLINK_CB(skb).sid); } err = 0; out: @@ -1697,14 +1584,14 @@ out: } static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { struct xfrm_policy *xp; struct xfrm_user_tmpl *ut; int i; - struct rtattr *rt = xfrma[XFRMA_TMPL-1]; + struct nlattr *rt = attrs[XFRMA_TMPL]; - struct xfrm_user_acquire *ua = NLMSG_DATA(nlh); + struct xfrm_user_acquire *ua = nlmsg_data(nlh); struct xfrm_state *x = xfrm_state_alloc(); int err = -ENOMEM; @@ -1719,7 +1606,7 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, } /* build an XP */ - xp = xfrm_policy_construct(&ua->policy, (struct rtattr **) xfrma, &err); + xp = xfrm_policy_construct(&ua->policy, attrs, &err); if (!xp) { kfree(x); return err; @@ -1729,7 +1616,7 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); - ut = RTA_DATA(rt); + ut = nla_data(rt); /* extract the templates and for each call km_key */ for (i = 0; i < xp->xfrm_nr; i++, ut++) { struct xfrm_tmpl *t = &xp->xfrm_vec[i]; @@ -1751,29 +1638,15 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, } #ifdef CONFIG_XFRM_MIGRATE -static int verify_user_migrate(struct rtattr **xfrma) -{ - struct rtattr *rt = xfrma[XFRMA_MIGRATE-1]; - struct xfrm_user_migrate *um; - - if (!rt) - return -EINVAL; - - if ((rt->rta_len - sizeof(*rt)) < sizeof(*um)) - return -EINVAL; - - return 0; -} - static int copy_from_user_migrate(struct xfrm_migrate *ma, - struct rtattr **xfrma, int *num) + struct nlattr **attrs, int *num) { - struct rtattr *rt = xfrma[XFRMA_MIGRATE-1]; + struct nlattr *rt = attrs[XFRMA_MIGRATE]; struct xfrm_user_migrate *um; int i, num_migrate; - um = RTA_DATA(rt); - num_migrate = (rt->rta_len - sizeof(*rt)) / sizeof(*um); + um = nla_data(rt); + num_migrate = nla_len(rt) / sizeof(*um); if (num_migrate <= 0 || num_migrate > XFRM_MAX_DEPTH) return -EINVAL; @@ -1797,24 +1670,23 @@ static int copy_from_user_migrate(struct xfrm_migrate *ma, } static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { - struct xfrm_userpolicy_id *pi = NLMSG_DATA(nlh); + struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); struct xfrm_migrate m[XFRM_MAX_DEPTH]; u8 type; int err; int n = 0; - err = verify_user_migrate((struct rtattr **)xfrma); - if (err) - return err; + if (attrs[XFRMA_MIGRATE] == NULL) + return -EINVAL; - err = copy_from_user_policy_type(&type, (struct rtattr **)xfrma); + err = copy_from_user_policy_type(&type, attrs); if (err) return err; err = copy_from_user_migrate((struct xfrm_migrate *)m, - (struct rtattr **)xfrma, &n); + attrs, &n); if (err) return err; @@ -1827,7 +1699,7 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, } #else static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, - struct rtattr **xfrma) + struct nlattr **attrs) { return -ENOPROTOOPT; } @@ -1849,11 +1721,14 @@ static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) memcpy(&um.new_daddr, &m->new_daddr, sizeof(um.new_daddr)); memcpy(&um.new_saddr, &m->new_saddr, sizeof(um.new_saddr)); - RTA_PUT(skb, XFRMA_MIGRATE, sizeof(um), &um); - return 0; + return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); +} -rtattr_failure: - return -1; +static inline size_t xfrm_migrate_msgsize(int num_migrate) +{ + return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) + + 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, @@ -1863,13 +1738,13 @@ static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, struct xfrm_migrate *mp; struct xfrm_userpolicy_id *pol_id; struct nlmsghdr *nlh; - unsigned char *b = skb_tail_pointer(skb); int i; - nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id)); - pol_id = NLMSG_DATA(nlh); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); + if (nlh == NULL) + return -EMSGSIZE; + pol_id = nlmsg_data(nlh); /* copy data from selector, dir, and type to the pol_id */ memset(pol_id, 0, sizeof(*pol_id)); memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); @@ -1883,25 +1758,18 @@ static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, goto nlmsg_failure; } - nlh->nlmsg_len = skb_tail_pointer(skb) - b; - return skb->len; + return nlmsg_end(skb, nlh); nlmsg_failure: - nlmsg_trim(skb, b); - return -1; + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; } static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, struct xfrm_migrate *m, int num_migrate) { struct sk_buff *skb; - size_t len; - len = RTA_SPACE(sizeof(struct xfrm_user_migrate) * num_migrate); - len += NLMSG_SPACE(sizeof(struct xfrm_userpolicy_id)); -#ifdef CONFIG_XFRM_SUB_POLICY - len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); -#endif - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; @@ -1909,9 +1777,7 @@ static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) BUG(); - NETLINK_CB(skb).dst_group = XFRMNLGRP_MIGRATE; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, - GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); } #else static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, @@ -1921,7 +1787,7 @@ static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, } #endif -#define XMSGSIZE(type) NLMSG_LENGTH(sizeof(struct type)) +#define XMSGSIZE(type) sizeof(struct type) static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), @@ -1937,19 +1803,36 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { [XFRM_MSG_UPDSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_info), [XFRM_MSG_POLEXPIRE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_polexpire), [XFRM_MSG_FLUSHSA - XFRM_MSG_BASE] = XMSGSIZE(xfrm_usersa_flush), - [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = NLMSG_LENGTH(0), + [XFRM_MSG_FLUSHPOLICY - XFRM_MSG_BASE] = 0, [XFRM_MSG_NEWAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), [XFRM_MSG_GETAE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_aevent_id), [XFRM_MSG_REPORT - XFRM_MSG_BASE] = XMSGSIZE(xfrm_user_report), [XFRM_MSG_MIGRATE - XFRM_MSG_BASE] = XMSGSIZE(xfrm_userpolicy_id), - [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)), - [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = NLMSG_LENGTH(sizeof(u32)), + [XFRM_MSG_GETSADINFO - XFRM_MSG_BASE] = sizeof(u32), + [XFRM_MSG_GETSPDINFO - XFRM_MSG_BASE] = sizeof(u32), }; #undef XMSGSIZE +static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { + [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, + [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, + [XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) }, + [XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) }, + [XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) }, + [XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) }, + [XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) }, + [XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) }, + [XFRMA_REPLAY_THRESH] = { .type = NLA_U32 }, + [XFRMA_ETIMER_THRESH] = { .type = NLA_U32 }, + [XFRMA_SRCADDR] = { .len = sizeof(xfrm_address_t) }, + [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, + [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, + [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, +}; + static struct xfrm_link { - int (*doit)(struct sk_buff *, struct nlmsghdr *, struct rtattr **); + int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); int (*dump)(struct sk_buff *, struct netlink_callback *); } xfrm_dispatch[XFRM_NR_MSGTYPES] = { [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, @@ -1977,9 +1860,9 @@ static struct xfrm_link { static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { - struct rtattr *xfrma[XFRMA_MAX]; + struct nlattr *attrs[XFRMA_MAX+1]; struct xfrm_link *link; - int type, min_len; + int type, err; type = nlh->nlmsg_type; if (type > XFRM_MSG_MAX) @@ -2001,98 +1884,71 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); } - memset(xfrma, 0, sizeof(xfrma)); - - if (nlh->nlmsg_len < (min_len = xfrm_msg_min[type])) - return -EINVAL; - - if (nlh->nlmsg_len > min_len) { - int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); - struct rtattr *attr = (void *) nlh + NLMSG_ALIGN(min_len); - - while (RTA_OK(attr, attrlen)) { - unsigned short flavor = attr->rta_type; - if (flavor) { - if (flavor > XFRMA_MAX) - return -EINVAL; - xfrma[flavor - 1] = attr; - } - attr = RTA_NEXT(attr, attrlen); - } - } + err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, + xfrma_policy); + if (err < 0) + return err; if (link->doit == NULL) return -EINVAL; - return link->doit(skb, nlh, xfrma); + 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); - netlink_run_queue(sk, &qlen, &xfrm_user_rcv_msg); - mutex_unlock(&xfrm_cfg_mutex); + mutex_lock(&xfrm_cfg_mutex); + netlink_rcv_skb(skb, &xfrm_user_rcv_msg); + mutex_unlock(&xfrm_cfg_mutex); +} - } while (qlen); +static inline size_t xfrm_expire_msgsize(void) +{ + return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)); } static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) { struct xfrm_user_expire *ue; struct nlmsghdr *nlh; - unsigned char *b = skb_tail_pointer(skb); - nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_EXPIRE, - sizeof(*ue)); - ue = NLMSG_DATA(nlh); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); + if (nlh == NULL) + return -EMSGSIZE; + ue = nlmsg_data(nlh); copy_to_user_state(x, &ue->state); ue->hard = (c->data.hard != 0) ? 1 : 0; - nlh->nlmsg_len = skb_tail_pointer(skb) - b; - return skb->len; - -nlmsg_failure: - nlmsg_trim(skb, b); - return -1; + return nlmsg_end(skb, nlh); } static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) { struct sk_buff *skb; - int len = NLMSG_LENGTH(sizeof(struct xfrm_user_expire)); - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; if (build_expire(skb, x, c) < 0) BUG(); - NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); } static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) { struct sk_buff *skb; - int len = NLMSG_LENGTH(sizeof(struct xfrm_aevent_id)); - len += RTA_SPACE(sizeof(struct xfrm_replay_state)); - len += RTA_SPACE(sizeof(struct xfrm_lifetime_cur)); - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; if (build_aevent(skb, x, c) < 0) BUG(); - NETLINK_CB(skb).dst_group = XFRMNLGRP_AEVENTS; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); } static int xfrm_notify_sa_flush(struct km_event *c) @@ -2100,42 +1956,45 @@ static int xfrm_notify_sa_flush(struct km_event *c) struct xfrm_usersa_flush *p; struct nlmsghdr *nlh; struct sk_buff *skb; - sk_buff_data_t b; - int len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_flush)); + int len = NLMSG_ALIGN(sizeof(struct xfrm_usersa_flush)); - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - b = skb->tail; - nlh = NLMSG_PUT(skb, c->pid, c->seq, - XFRM_MSG_FLUSHSA, sizeof(*p)); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); + if (nlh == NULL) { + kfree_skb(skb); + return -EMSGSIZE; + } - p = NLMSG_DATA(nlh); + p = nlmsg_data(nlh); p->proto = c->data.proto; - nlh->nlmsg_len = skb->tail - b; - - NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); + nlmsg_end(skb, nlh); -nlmsg_failure: - kfree_skb(skb); - return -1; + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); } -static inline int xfrm_sa_len(struct xfrm_state *x) +static inline size_t xfrm_sa_len(struct xfrm_state *x) { - int l = 0; + size_t l = 0; if (x->aalg) - l += RTA_SPACE(sizeof(*x->aalg) + (x->aalg->alg_key_len+7)/8); + l += nla_total_size(alg_len(x->aalg)); if (x->ealg) - l += RTA_SPACE(sizeof(*x->ealg) + (x->ealg->alg_key_len+7)/8); + l += nla_total_size(alg_len(x->ealg)); if (x->calg) - l += RTA_SPACE(sizeof(*x->calg)); + l += nla_total_size(sizeof(*x->calg)); if (x->encap) - l += RTA_SPACE(sizeof(*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 this as this may become non-zero behind our back. */ + l += nla_total_size(sizeof(x->lastused)); return l; } @@ -2146,57 +2005,51 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) struct xfrm_usersa_id *id; struct nlmsghdr *nlh; struct sk_buff *skb; - sk_buff_data_t b; int len = xfrm_sa_len(x); int headlen; headlen = sizeof(*p); if (c->event == XFRM_MSG_DELSA) { - len += RTA_SPACE(headlen); + len += nla_total_size(headlen); headlen = sizeof(*id); } - len += NLMSG_SPACE(headlen); + len += NLMSG_ALIGN(headlen); - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - b = skb->tail; - nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); + if (nlh == NULL) + goto nla_put_failure; - p = NLMSG_DATA(nlh); + p = nlmsg_data(nlh); if (c->event == XFRM_MSG_DELSA) { - id = NLMSG_DATA(nlh); + struct nlattr *attr; + + id = nlmsg_data(nlh); memcpy(&id->daddr, &x->id.daddr, sizeof(id->daddr)); id->spi = x->id.spi; id->family = x->props.family; id->proto = x->id.proto; - p = RTA_DATA(__RTA_PUT(skb, XFRMA_SA, sizeof(*p))); - } - - copy_to_user_state(x, p); + attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); + if (attr == NULL) + goto nla_put_failure; - if (x->aalg) - RTA_PUT(skb, XFRMA_ALG_AUTH, - sizeof(*(x->aalg))+(x->aalg->alg_key_len+7)/8, x->aalg); - if (x->ealg) - RTA_PUT(skb, XFRMA_ALG_CRYPT, - sizeof(*(x->ealg))+(x->ealg->alg_key_len+7)/8, x->ealg); - if (x->calg) - RTA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); + p = nla_data(attr); + } - if (x->encap) - RTA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); + if (copy_to_user_state_extra(x, p, skb)) + goto nla_put_failure; - nlh->nlmsg_len = skb->tail - b; + nlmsg_end(skb, nlh); - NETLINK_CB(skb).dst_group = XFRMNLGRP_SA; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); -nlmsg_failure: -rtattr_failure: +nla_put_failure: + /* Somebody screwed up with xfrm_sa_len! */ + WARN_ON(1); kfree_skb(skb); return -1; } @@ -2224,20 +2077,28 @@ static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) } +static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, + struct xfrm_policy *xp) +{ + return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) + + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) + + nla_total_size(xfrm_user_sec_ctx_size(x->security)) + + userpolicy_type_attrsize(); +} + static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, struct xfrm_tmpl *xt, struct xfrm_policy *xp, int dir) { struct xfrm_user_acquire *ua; struct nlmsghdr *nlh; - unsigned char *b = skb_tail_pointer(skb); __u32 seq = xfrm_get_acqseq(); - nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_ACQUIRE, - sizeof(*ua)); - ua = NLMSG_DATA(nlh); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); + if (nlh == NULL) + return -EMSGSIZE; + ua = nlmsg_data(nlh); memcpy(&ua->id, &x->id, sizeof(ua->id)); memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); @@ -2254,35 +2115,26 @@ static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, if (copy_to_user_policy_type(xp->type, skb) < 0) goto nlmsg_failure; - nlh->nlmsg_len = skb_tail_pointer(skb) - b; - return skb->len; + return nlmsg_end(skb, nlh); nlmsg_failure: - nlmsg_trim(skb, b); - return -1; + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; } static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, struct xfrm_policy *xp, int dir) { struct sk_buff *skb; - size_t len; - len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); - len += NLMSG_SPACE(sizeof(struct xfrm_user_acquire)); - len += RTA_SPACE(xfrm_user_sec_ctx_size(x->security)); -#ifdef CONFIG_XFRM_SUB_POLICY - len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); -#endif - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; if (build_acquire(skb, x, xt, xp, dir) < 0) BUG(); - NETLINK_CB(skb).dst_group = XFRMNLGRP_ACQUIRE; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); } /* User gives us xfrm_user_policy_info followed by an array of 0 @@ -2344,18 +2196,26 @@ static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, return xp; } +static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) +{ + return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) + + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) + + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) + + userpolicy_type_attrsize(); +} + static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, int dir, struct km_event *c) { struct xfrm_user_polexpire *upe; struct nlmsghdr *nlh; int hard = c->data.hard; - unsigned char *b = skb_tail_pointer(skb); - nlh = NLMSG_PUT(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe)); - upe = NLMSG_DATA(nlh); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); + if (nlh == NULL) + return -EMSGSIZE; + upe = nlmsg_data(nlh); copy_to_user_policy(xp, &upe->pol, dir); if (copy_to_user_tmpl(xp, skb) < 0) goto nlmsg_failure; @@ -2365,34 +2225,25 @@ static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, goto nlmsg_failure; upe->hard = !!hard; - nlh->nlmsg_len = skb_tail_pointer(skb) - b; - return skb->len; + return nlmsg_end(skb, nlh); nlmsg_failure: - nlmsg_trim(skb, b); - return -1; + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; } static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) { struct sk_buff *skb; - size_t len; - len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); - len += NLMSG_SPACE(sizeof(struct xfrm_user_polexpire)); - len += RTA_SPACE(xfrm_user_sec_ctx_size(xp->security)); -#ifdef CONFIG_XFRM_SUB_POLICY - len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); -#endif - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; if (build_polexpire(skb, xp, dir, c) < 0) BUG(); - NETLINK_CB(skb).dst_group = XFRMNLGRP_EXPIRE; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); } static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) @@ -2401,30 +2252,30 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event * struct xfrm_userpolicy_id *id; struct nlmsghdr *nlh; struct sk_buff *skb; - sk_buff_data_t b; - int len = RTA_SPACE(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); + int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); int headlen; headlen = sizeof(*p); if (c->event == XFRM_MSG_DELPOLICY) { - len += RTA_SPACE(headlen); + len += nla_total_size(headlen); headlen = sizeof(*id); } -#ifdef CONFIG_XFRM_SUB_POLICY - len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); -#endif - len += NLMSG_SPACE(headlen); + len += userpolicy_type_attrsize(); + len += NLMSG_ALIGN(headlen); - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - b = skb->tail; - nlh = NLMSG_PUT(skb, c->pid, c->seq, c->event, headlen); + nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); + if (nlh == NULL) + goto nlmsg_failure; - p = NLMSG_DATA(nlh); + p = nlmsg_data(nlh); if (c->event == XFRM_MSG_DELPOLICY) { - id = NLMSG_DATA(nlh); + struct nlattr *attr; + + id = nlmsg_data(nlh); memset(id, 0, sizeof(*id)); id->dir = dir; if (c->data.byid) @@ -2432,10 +2283,12 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event * else memcpy(&id->sel, &xp->selector, sizeof(id->sel)); - p = RTA_DATA(__RTA_PUT(skb, XFRMA_POLICY, sizeof(*p))); - } + attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); + if (attr == NULL) + goto nlmsg_failure; - nlh->nlmsg_flags = 0; + p = nla_data(attr); + } copy_to_user_policy(xp, p, dir); if (copy_to_user_tmpl(xp, skb) < 0) @@ -2443,13 +2296,11 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event * if (copy_to_user_policy_type(xp->type, skb) < 0) goto nlmsg_failure; - nlh->nlmsg_len = skb->tail - b; + nlmsg_end(skb, nlh); - NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); nlmsg_failure: -rtattr_failure: kfree_skb(skb); return -1; } @@ -2458,28 +2309,20 @@ static int xfrm_notify_policy_flush(struct km_event *c) { struct nlmsghdr *nlh; struct sk_buff *skb; - sk_buff_data_t b; - int len = 0; -#ifdef CONFIG_XFRM_SUB_POLICY - len += RTA_SPACE(sizeof(struct xfrm_userpolicy_type)); -#endif - len += NLMSG_LENGTH(0); - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - b = skb->tail; - - nlh = NLMSG_PUT(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); + if (nlh == NULL) + goto nlmsg_failure; if (copy_to_user_policy_type(c->data.type, skb) < 0) goto nlmsg_failure; - nlh->nlmsg_len = skb->tail - b; + nlmsg_end(skb, nlh); - NETLINK_CB(skb).dst_group = XFRMNLGRP_POLICY; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); nlmsg_failure: kfree_skb(skb); @@ -2506,48 +2349,48 @@ static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_ev } +static inline size_t xfrm_report_msgsize(void) +{ + return NLMSG_ALIGN(sizeof(struct xfrm_user_report)); +} + static int build_report(struct sk_buff *skb, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) { struct xfrm_user_report *ur; struct nlmsghdr *nlh; - unsigned char *b = skb_tail_pointer(skb); - nlh = NLMSG_PUT(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur)); - ur = NLMSG_DATA(nlh); - nlh->nlmsg_flags = 0; + nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_REPORT, sizeof(*ur), 0); + if (nlh == NULL) + return -EMSGSIZE; + ur = nlmsg_data(nlh); ur->proto = proto; memcpy(&ur->sel, sel, sizeof(ur->sel)); if (addr) - RTA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); + NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); - nlh->nlmsg_len = skb_tail_pointer(skb) - b; - return skb->len; + return nlmsg_end(skb, nlh); -nlmsg_failure: -rtattr_failure: - nlmsg_trim(skb, b); - return -1; +nla_put_failure: + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; } static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) { struct sk_buff *skb; - size_t len; - len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(struct xfrm_user_report))); - skb = alloc_skb(len, GFP_ATOMIC); + skb = nlmsg_new(xfrm_report_msgsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; if (build_report(skb, proto, sel, addr) < 0) BUG(); - NETLINK_CB(skb).dst_group = XFRMNLGRP_REPORT; - return netlink_broadcast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); + return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); } static struct xfrm_mgr netlink_mgr = { @@ -2566,7 +2409,7 @@ static int __init xfrm_user_init(void) printk(KERN_INFO "Initializing XFRM netlink socket\n"); - nlsk = netlink_kernel_create(NETLINK_XFRM, XFRMNLGRP_MAX, + nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX, xfrm_netlink_rcv, NULL, THIS_MODULE); if (nlsk == NULL) return -ENOMEM; |