11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * xfrm_state.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Changes: 51da177e4SLinus Torvalds * Mitsuru KANDA @USAGI 61da177e4SLinus Torvalds * Kazunori MIYAZAWA @USAGI 71da177e4SLinus Torvalds * Kunihiro Ishiguro <kunihiro@ipinfusion.com> 81da177e4SLinus Torvalds * IPv6 support 91da177e4SLinus Torvalds * YOSHIFUJI Hideaki @USAGI 101da177e4SLinus Torvalds * Split up af-specific functions 111da177e4SLinus Torvalds * Derek Atkins <derek@ihtfp.com> 121da177e4SLinus Torvalds * Add UDP Encapsulation 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds */ 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds #include <linux/workqueue.h> 171da177e4SLinus Torvalds #include <net/xfrm.h> 181da177e4SLinus Torvalds #include <linux/pfkeyv2.h> 191da177e4SLinus Torvalds #include <linux/ipsec.h> 201da177e4SLinus Torvalds #include <linux/module.h> 21f034b5d4SDavid S. Miller #include <linux/cache.h> 2268277accSPaul Moore #include <linux/audit.h> 23b5890d8bSJesper Juhl #include <asm/uaccess.h> 249e0d57fdSYury Polyanskiy #include <linux/ktime.h> 255a0e3ad6STejun Heo #include <linux/slab.h> 269e0d57fdSYury Polyanskiy #include <linux/interrupt.h> 279e0d57fdSYury Polyanskiy #include <linux/kernel.h> 281da177e4SLinus Torvalds 2944e36b42SDavid S. Miller #include "xfrm_hash.h" 3044e36b42SDavid S. Miller 311da177e4SLinus Torvalds /* Each xfrm_state may be linked to two tables: 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) 34a624c108SDavid S. Miller 2. Hash table by (daddr,family,reqid) to find what SAs exist for given 351da177e4SLinus Torvalds destination/tunnel endpoint. (output) 361da177e4SLinus Torvalds */ 371da177e4SLinus Torvalds 38f034b5d4SDavid S. Miller static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; 391da177e4SLinus Torvalds 4064d0cd00SAlexey Dobriyan static inline unsigned int xfrm_dst_hash(struct net *net, 412ab38503SDavid S. Miller const xfrm_address_t *daddr, 422ab38503SDavid S. Miller const xfrm_address_t *saddr, 43c1969f29SDavid S. Miller u32 reqid, 44a624c108SDavid S. Miller unsigned short family) 45a624c108SDavid S. Miller { 4664d0cd00SAlexey Dobriyan return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); 47a624c108SDavid S. Miller } 48a624c108SDavid S. Miller 4964d0cd00SAlexey Dobriyan static inline unsigned int xfrm_src_hash(struct net *net, 502ab38503SDavid S. Miller const xfrm_address_t *daddr, 512ab38503SDavid S. Miller const xfrm_address_t *saddr, 5244e36b42SDavid S. Miller unsigned short family) 53f034b5d4SDavid S. Miller { 5464d0cd00SAlexey Dobriyan return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); 55f034b5d4SDavid S. Miller } 56f034b5d4SDavid S. Miller 572575b654SDavid S. Miller static inline unsigned int 582ab38503SDavid S. Miller xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, 592ab38503SDavid S. Miller __be32 spi, u8 proto, unsigned short family) 60f034b5d4SDavid S. Miller { 6164d0cd00SAlexey Dobriyan return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); 62f034b5d4SDavid S. Miller } 63f034b5d4SDavid S. Miller 64f034b5d4SDavid S. Miller static void xfrm_hash_transfer(struct hlist_head *list, 65f034b5d4SDavid S. Miller struct hlist_head *ndsttable, 66f034b5d4SDavid S. Miller struct hlist_head *nsrctable, 67f034b5d4SDavid S. Miller struct hlist_head *nspitable, 68f034b5d4SDavid S. Miller unsigned int nhashmask) 69f034b5d4SDavid S. Miller { 70b67bfe0dSSasha Levin struct hlist_node *tmp; 71f034b5d4SDavid S. Miller struct xfrm_state *x; 72f034b5d4SDavid S. Miller 73b67bfe0dSSasha Levin hlist_for_each_entry_safe(x, tmp, list, bydst) { 74f034b5d4SDavid S. Miller unsigned int h; 75f034b5d4SDavid S. Miller 76c1969f29SDavid S. Miller h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, 77c1969f29SDavid S. Miller x->props.reqid, x->props.family, 78c1969f29SDavid S. Miller nhashmask); 79f034b5d4SDavid S. Miller hlist_add_head(&x->bydst, ndsttable+h); 80f034b5d4SDavid S. Miller 81667bbcb6SMasahide NAKAMURA h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, 82667bbcb6SMasahide NAKAMURA x->props.family, 83f034b5d4SDavid S. Miller nhashmask); 84f034b5d4SDavid S. Miller hlist_add_head(&x->bysrc, nsrctable+h); 85f034b5d4SDavid S. Miller 867b4dc360SMasahide NAKAMURA if (x->id.spi) { 877b4dc360SMasahide NAKAMURA h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, 887b4dc360SMasahide NAKAMURA x->id.proto, x->props.family, 897b4dc360SMasahide NAKAMURA nhashmask); 90f034b5d4SDavid S. Miller hlist_add_head(&x->byspi, nspitable+h); 91f034b5d4SDavid S. Miller } 92f034b5d4SDavid S. Miller } 937b4dc360SMasahide NAKAMURA } 94f034b5d4SDavid S. Miller 9563082733SAlexey Dobriyan static unsigned long xfrm_hash_new_size(unsigned int state_hmask) 96f034b5d4SDavid S. Miller { 9763082733SAlexey Dobriyan return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); 98f034b5d4SDavid S. Miller } 99f034b5d4SDavid S. Miller 100f034b5d4SDavid S. Miller static DEFINE_MUTEX(hash_resize_mutex); 101f034b5d4SDavid S. Miller 10263082733SAlexey Dobriyan static void xfrm_hash_resize(struct work_struct *work) 103f034b5d4SDavid S. Miller { 10463082733SAlexey Dobriyan struct net *net = container_of(work, struct net, xfrm.state_hash_work); 105f034b5d4SDavid S. Miller struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; 106f034b5d4SDavid S. Miller unsigned long nsize, osize; 107f034b5d4SDavid S. Miller unsigned int nhashmask, ohashmask; 108f034b5d4SDavid S. Miller int i; 109f034b5d4SDavid S. Miller 110f034b5d4SDavid S. Miller mutex_lock(&hash_resize_mutex); 111f034b5d4SDavid S. Miller 11263082733SAlexey Dobriyan nsize = xfrm_hash_new_size(net->xfrm.state_hmask); 11344e36b42SDavid S. Miller ndst = xfrm_hash_alloc(nsize); 114f034b5d4SDavid S. Miller if (!ndst) 115f034b5d4SDavid S. Miller goto out_unlock; 11644e36b42SDavid S. Miller nsrc = xfrm_hash_alloc(nsize); 117f034b5d4SDavid S. Miller if (!nsrc) { 11844e36b42SDavid S. Miller xfrm_hash_free(ndst, nsize); 119f034b5d4SDavid S. Miller goto out_unlock; 120f034b5d4SDavid S. Miller } 12144e36b42SDavid S. Miller nspi = xfrm_hash_alloc(nsize); 122f034b5d4SDavid S. Miller if (!nspi) { 12344e36b42SDavid S. Miller xfrm_hash_free(ndst, nsize); 12444e36b42SDavid S. Miller xfrm_hash_free(nsrc, nsize); 125f034b5d4SDavid S. Miller goto out_unlock; 126f034b5d4SDavid S. Miller } 127f034b5d4SDavid S. Miller 128283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 129f034b5d4SDavid S. Miller 130f034b5d4SDavid S. Miller nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; 13163082733SAlexey Dobriyan for (i = net->xfrm.state_hmask; i >= 0; i--) 13263082733SAlexey Dobriyan xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, 133f034b5d4SDavid S. Miller nhashmask); 134f034b5d4SDavid S. Miller 13563082733SAlexey Dobriyan odst = net->xfrm.state_bydst; 13663082733SAlexey Dobriyan osrc = net->xfrm.state_bysrc; 13763082733SAlexey Dobriyan ospi = net->xfrm.state_byspi; 13863082733SAlexey Dobriyan ohashmask = net->xfrm.state_hmask; 139f034b5d4SDavid S. Miller 14063082733SAlexey Dobriyan net->xfrm.state_bydst = ndst; 14163082733SAlexey Dobriyan net->xfrm.state_bysrc = nsrc; 14263082733SAlexey Dobriyan net->xfrm.state_byspi = nspi; 14363082733SAlexey Dobriyan net->xfrm.state_hmask = nhashmask; 144f034b5d4SDavid S. Miller 145283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 146f034b5d4SDavid S. Miller 147f034b5d4SDavid S. Miller osize = (ohashmask + 1) * sizeof(struct hlist_head); 14844e36b42SDavid S. Miller xfrm_hash_free(odst, osize); 14944e36b42SDavid S. Miller xfrm_hash_free(osrc, osize); 15044e36b42SDavid S. Miller xfrm_hash_free(ospi, osize); 151f034b5d4SDavid S. Miller 152f034b5d4SDavid S. Miller out_unlock: 153f034b5d4SDavid S. Miller mutex_unlock(&hash_resize_mutex); 154f034b5d4SDavid S. Miller } 155f034b5d4SDavid S. Miller 15644abdc30SCong Wang static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); 15744abdc30SCong Wang static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds static DEFINE_SPINLOCK(xfrm_state_gc_lock); 1601da177e4SLinus Torvalds 16153bc6b4dSJamal Hadi Salim int __xfrm_state_delete(struct xfrm_state *x); 1621da177e4SLinus Torvalds 163980ebd25SJamal Hadi Salim int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 16415e47304SEric W. Biederman void km_state_expired(struct xfrm_state *x, int hard, u32 portid); 1651da177e4SLinus Torvalds 1667a9885b9SCong Wang static DEFINE_SPINLOCK(xfrm_type_lock); 167533cb5b0SEric Dumazet int xfrm_register_type(const struct xfrm_type *type, unsigned short family) 168aa5d62ccSHerbert Xu { 1697a9885b9SCong Wang struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); 170533cb5b0SEric Dumazet const struct xfrm_type **typemap; 171aa5d62ccSHerbert Xu int err = 0; 172aa5d62ccSHerbert Xu 173aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 174aa5d62ccSHerbert Xu return -EAFNOSUPPORT; 175aa5d62ccSHerbert Xu typemap = afinfo->type_map; 1767a9885b9SCong Wang spin_lock_bh(&xfrm_type_lock); 177aa5d62ccSHerbert Xu 178aa5d62ccSHerbert Xu if (likely(typemap[type->proto] == NULL)) 179aa5d62ccSHerbert Xu typemap[type->proto] = type; 180aa5d62ccSHerbert Xu else 181aa5d62ccSHerbert Xu err = -EEXIST; 1827a9885b9SCong Wang spin_unlock_bh(&xfrm_type_lock); 1837a9885b9SCong Wang xfrm_state_put_afinfo(afinfo); 184aa5d62ccSHerbert Xu return err; 185aa5d62ccSHerbert Xu } 186aa5d62ccSHerbert Xu EXPORT_SYMBOL(xfrm_register_type); 187aa5d62ccSHerbert Xu 188533cb5b0SEric Dumazet int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) 189aa5d62ccSHerbert Xu { 1907a9885b9SCong Wang struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); 191533cb5b0SEric Dumazet const struct xfrm_type **typemap; 192aa5d62ccSHerbert Xu int err = 0; 193aa5d62ccSHerbert Xu 194aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 195aa5d62ccSHerbert Xu return -EAFNOSUPPORT; 196aa5d62ccSHerbert Xu typemap = afinfo->type_map; 1977a9885b9SCong Wang spin_lock_bh(&xfrm_type_lock); 198aa5d62ccSHerbert Xu 199aa5d62ccSHerbert Xu if (unlikely(typemap[type->proto] != type)) 200aa5d62ccSHerbert Xu err = -ENOENT; 201aa5d62ccSHerbert Xu else 202aa5d62ccSHerbert Xu typemap[type->proto] = NULL; 2037a9885b9SCong Wang spin_unlock_bh(&xfrm_type_lock); 2047a9885b9SCong Wang xfrm_state_put_afinfo(afinfo); 205aa5d62ccSHerbert Xu return err; 206aa5d62ccSHerbert Xu } 207aa5d62ccSHerbert Xu EXPORT_SYMBOL(xfrm_unregister_type); 208aa5d62ccSHerbert Xu 209533cb5b0SEric Dumazet static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) 210aa5d62ccSHerbert Xu { 211aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 212533cb5b0SEric Dumazet const struct xfrm_type **typemap; 213533cb5b0SEric Dumazet const struct xfrm_type *type; 214aa5d62ccSHerbert Xu int modload_attempted = 0; 215aa5d62ccSHerbert Xu 216aa5d62ccSHerbert Xu retry: 217aa5d62ccSHerbert Xu afinfo = xfrm_state_get_afinfo(family); 218aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 219aa5d62ccSHerbert Xu return NULL; 220aa5d62ccSHerbert Xu typemap = afinfo->type_map; 221aa5d62ccSHerbert Xu 222aa5d62ccSHerbert Xu type = typemap[proto]; 223aa5d62ccSHerbert Xu if (unlikely(type && !try_module_get(type->owner))) 224aa5d62ccSHerbert Xu type = NULL; 225aa5d62ccSHerbert Xu if (!type && !modload_attempted) { 226aa5d62ccSHerbert Xu xfrm_state_put_afinfo(afinfo); 227aa5d62ccSHerbert Xu request_module("xfrm-type-%d-%d", family, proto); 228aa5d62ccSHerbert Xu modload_attempted = 1; 229aa5d62ccSHerbert Xu goto retry; 230aa5d62ccSHerbert Xu } 231aa5d62ccSHerbert Xu 232aa5d62ccSHerbert Xu xfrm_state_put_afinfo(afinfo); 233aa5d62ccSHerbert Xu return type; 234aa5d62ccSHerbert Xu } 235aa5d62ccSHerbert Xu 236533cb5b0SEric Dumazet static void xfrm_put_type(const struct xfrm_type *type) 237aa5d62ccSHerbert Xu { 238aa5d62ccSHerbert Xu module_put(type->owner); 239aa5d62ccSHerbert Xu } 240aa5d62ccSHerbert Xu 2417a9885b9SCong Wang static DEFINE_SPINLOCK(xfrm_mode_lock); 242aa5d62ccSHerbert Xu int xfrm_register_mode(struct xfrm_mode *mode, int family) 243aa5d62ccSHerbert Xu { 244aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 245aa5d62ccSHerbert Xu struct xfrm_mode **modemap; 246aa5d62ccSHerbert Xu int err; 247aa5d62ccSHerbert Xu 248aa5d62ccSHerbert Xu if (unlikely(mode->encap >= XFRM_MODE_MAX)) 249aa5d62ccSHerbert Xu return -EINVAL; 250aa5d62ccSHerbert Xu 2517a9885b9SCong Wang afinfo = xfrm_state_get_afinfo(family); 252aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 253aa5d62ccSHerbert Xu return -EAFNOSUPPORT; 254aa5d62ccSHerbert Xu 255aa5d62ccSHerbert Xu err = -EEXIST; 256aa5d62ccSHerbert Xu modemap = afinfo->mode_map; 2577a9885b9SCong Wang spin_lock_bh(&xfrm_mode_lock); 25817c2a42aSHerbert Xu if (modemap[mode->encap]) 25917c2a42aSHerbert Xu goto out; 26017c2a42aSHerbert Xu 26117c2a42aSHerbert Xu err = -ENOENT; 26217c2a42aSHerbert Xu if (!try_module_get(afinfo->owner)) 26317c2a42aSHerbert Xu goto out; 26417c2a42aSHerbert Xu 26517c2a42aSHerbert Xu mode->afinfo = afinfo; 266aa5d62ccSHerbert Xu modemap[mode->encap] = mode; 267aa5d62ccSHerbert Xu err = 0; 268aa5d62ccSHerbert Xu 26917c2a42aSHerbert Xu out: 2707a9885b9SCong Wang spin_unlock_bh(&xfrm_mode_lock); 2717a9885b9SCong Wang xfrm_state_put_afinfo(afinfo); 272aa5d62ccSHerbert Xu return err; 273aa5d62ccSHerbert Xu } 274aa5d62ccSHerbert Xu EXPORT_SYMBOL(xfrm_register_mode); 275aa5d62ccSHerbert Xu 276aa5d62ccSHerbert Xu int xfrm_unregister_mode(struct xfrm_mode *mode, int family) 277aa5d62ccSHerbert Xu { 278aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 279aa5d62ccSHerbert Xu struct xfrm_mode **modemap; 280aa5d62ccSHerbert Xu int err; 281aa5d62ccSHerbert Xu 282aa5d62ccSHerbert Xu if (unlikely(mode->encap >= XFRM_MODE_MAX)) 283aa5d62ccSHerbert Xu return -EINVAL; 284aa5d62ccSHerbert Xu 2857a9885b9SCong Wang afinfo = xfrm_state_get_afinfo(family); 286aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 287aa5d62ccSHerbert Xu return -EAFNOSUPPORT; 288aa5d62ccSHerbert Xu 289aa5d62ccSHerbert Xu err = -ENOENT; 290aa5d62ccSHerbert Xu modemap = afinfo->mode_map; 2917a9885b9SCong Wang spin_lock_bh(&xfrm_mode_lock); 292aa5d62ccSHerbert Xu if (likely(modemap[mode->encap] == mode)) { 293aa5d62ccSHerbert Xu modemap[mode->encap] = NULL; 29417c2a42aSHerbert Xu module_put(mode->afinfo->owner); 295aa5d62ccSHerbert Xu err = 0; 296aa5d62ccSHerbert Xu } 297aa5d62ccSHerbert Xu 2987a9885b9SCong Wang spin_unlock_bh(&xfrm_mode_lock); 2997a9885b9SCong Wang xfrm_state_put_afinfo(afinfo); 300aa5d62ccSHerbert Xu return err; 301aa5d62ccSHerbert Xu } 302aa5d62ccSHerbert Xu EXPORT_SYMBOL(xfrm_unregister_mode); 303aa5d62ccSHerbert Xu 304aa5d62ccSHerbert Xu static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) 305aa5d62ccSHerbert Xu { 306aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 307aa5d62ccSHerbert Xu struct xfrm_mode *mode; 308aa5d62ccSHerbert Xu int modload_attempted = 0; 309aa5d62ccSHerbert Xu 310aa5d62ccSHerbert Xu if (unlikely(encap >= XFRM_MODE_MAX)) 311aa5d62ccSHerbert Xu return NULL; 312aa5d62ccSHerbert Xu 313aa5d62ccSHerbert Xu retry: 314aa5d62ccSHerbert Xu afinfo = xfrm_state_get_afinfo(family); 315aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 316aa5d62ccSHerbert Xu return NULL; 317aa5d62ccSHerbert Xu 318aa5d62ccSHerbert Xu mode = afinfo->mode_map[encap]; 319aa5d62ccSHerbert Xu if (unlikely(mode && !try_module_get(mode->owner))) 320aa5d62ccSHerbert Xu mode = NULL; 321aa5d62ccSHerbert Xu if (!mode && !modload_attempted) { 322aa5d62ccSHerbert Xu xfrm_state_put_afinfo(afinfo); 323aa5d62ccSHerbert Xu request_module("xfrm-mode-%d-%d", family, encap); 324aa5d62ccSHerbert Xu modload_attempted = 1; 325aa5d62ccSHerbert Xu goto retry; 326aa5d62ccSHerbert Xu } 327aa5d62ccSHerbert Xu 328aa5d62ccSHerbert Xu xfrm_state_put_afinfo(afinfo); 329aa5d62ccSHerbert Xu return mode; 330aa5d62ccSHerbert Xu } 331aa5d62ccSHerbert Xu 332aa5d62ccSHerbert Xu static void xfrm_put_mode(struct xfrm_mode *mode) 333aa5d62ccSHerbert Xu { 334aa5d62ccSHerbert Xu module_put(mode->owner); 335aa5d62ccSHerbert Xu } 336aa5d62ccSHerbert Xu 3371da177e4SLinus Torvalds static void xfrm_state_gc_destroy(struct xfrm_state *x) 3381da177e4SLinus Torvalds { 3399e0d57fdSYury Polyanskiy tasklet_hrtimer_cancel(&x->mtimer); 340a47f0ce0SDavid S. Miller del_timer_sync(&x->rtimer); 3411da177e4SLinus Torvalds kfree(x->aalg); 3421da177e4SLinus Torvalds kfree(x->ealg); 3431da177e4SLinus Torvalds kfree(x->calg); 3441da177e4SLinus Torvalds kfree(x->encap); 345060f02a3SNoriaki TAKAMIYA kfree(x->coaddr); 346d8647b79SSteffen Klassert kfree(x->replay_esn); 347d8647b79SSteffen Klassert kfree(x->preplay_esn); 34813996378SHerbert Xu if (x->inner_mode) 34913996378SHerbert Xu xfrm_put_mode(x->inner_mode); 350df9dcb45SKazunori MIYAZAWA if (x->inner_mode_iaf) 351df9dcb45SKazunori MIYAZAWA xfrm_put_mode(x->inner_mode_iaf); 35213996378SHerbert Xu if (x->outer_mode) 35313996378SHerbert Xu xfrm_put_mode(x->outer_mode); 3541da177e4SLinus Torvalds if (x->type) { 3551da177e4SLinus Torvalds x->type->destructor(x); 3561da177e4SLinus Torvalds xfrm_put_type(x->type); 3571da177e4SLinus Torvalds } 358df71837dSTrent Jaeger security_xfrm_state_free(x); 3591da177e4SLinus Torvalds kfree(x); 3601da177e4SLinus Torvalds } 3611da177e4SLinus Torvalds 362c7837144SAlexey Dobriyan static void xfrm_state_gc_task(struct work_struct *work) 3631da177e4SLinus Torvalds { 364c7837144SAlexey Dobriyan struct net *net = container_of(work, struct net, xfrm.state_gc_work); 36512a169e7SHerbert Xu struct xfrm_state *x; 366b67bfe0dSSasha Levin struct hlist_node *tmp; 36712a169e7SHerbert Xu struct hlist_head gc_list; 3681da177e4SLinus Torvalds 3691da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_gc_lock); 370c7837144SAlexey Dobriyan hlist_move_list(&net->xfrm.state_gc_list, &gc_list); 3711da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_gc_lock); 3721da177e4SLinus Torvalds 373b67bfe0dSSasha Levin hlist_for_each_entry_safe(x, tmp, &gc_list, gclist) 3741da177e4SLinus Torvalds xfrm_state_gc_destroy(x); 3751da177e4SLinus Torvalds } 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds static inline unsigned long make_jiffies(long secs) 3781da177e4SLinus Torvalds { 3791da177e4SLinus Torvalds if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) 3801da177e4SLinus Torvalds return MAX_SCHEDULE_TIMEOUT-1; 3811da177e4SLinus Torvalds else 3821da177e4SLinus Torvalds return secs*HZ; 3831da177e4SLinus Torvalds } 3841da177e4SLinus Torvalds 3859e0d57fdSYury Polyanskiy static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me) 3861da177e4SLinus Torvalds { 3879e0d57fdSYury Polyanskiy struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); 3889e0d57fdSYury Polyanskiy struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); 3899d729f72SJames Morris unsigned long now = get_seconds(); 3901da177e4SLinus Torvalds long next = LONG_MAX; 3911da177e4SLinus Torvalds int warn = 0; 392161a09e7SJoy Latten int err = 0; 3931da177e4SLinus Torvalds 3941da177e4SLinus Torvalds spin_lock(&x->lock); 3951da177e4SLinus Torvalds if (x->km.state == XFRM_STATE_DEAD) 3961da177e4SLinus Torvalds goto out; 3971da177e4SLinus Torvalds if (x->km.state == XFRM_STATE_EXPIRED) 3981da177e4SLinus Torvalds goto expired; 3991da177e4SLinus Torvalds if (x->lft.hard_add_expires_seconds) { 4001da177e4SLinus Torvalds long tmo = x->lft.hard_add_expires_seconds + 4011da177e4SLinus Torvalds x->curlft.add_time - now; 402e3c0d047SFan Du if (tmo <= 0) { 403e3c0d047SFan Du if (x->xflags & XFRM_SOFT_EXPIRE) { 404e3c0d047SFan Du /* enter hard expire without soft expire first?! 405e3c0d047SFan Du * setting a new date could trigger this. 406e3c0d047SFan Du * workarbound: fix x->curflt.add_time by below: 407e3c0d047SFan Du */ 408e3c0d047SFan Du x->curlft.add_time = now - x->saved_tmo - 1; 409e3c0d047SFan Du tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; 410e3c0d047SFan Du } else 4111da177e4SLinus Torvalds goto expired; 412e3c0d047SFan Du } 4131da177e4SLinus Torvalds if (tmo < next) 4141da177e4SLinus Torvalds next = tmo; 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds if (x->lft.hard_use_expires_seconds) { 4171da177e4SLinus Torvalds long tmo = x->lft.hard_use_expires_seconds + 4181da177e4SLinus Torvalds (x->curlft.use_time ? : now) - now; 4191da177e4SLinus Torvalds if (tmo <= 0) 4201da177e4SLinus Torvalds goto expired; 4211da177e4SLinus Torvalds if (tmo < next) 4221da177e4SLinus Torvalds next = tmo; 4231da177e4SLinus Torvalds } 4241da177e4SLinus Torvalds if (x->km.dying) 4251da177e4SLinus Torvalds goto resched; 4261da177e4SLinus Torvalds if (x->lft.soft_add_expires_seconds) { 4271da177e4SLinus Torvalds long tmo = x->lft.soft_add_expires_seconds + 4281da177e4SLinus Torvalds x->curlft.add_time - now; 429e3c0d047SFan Du if (tmo <= 0) { 4301da177e4SLinus Torvalds warn = 1; 431e3c0d047SFan Du x->xflags &= ~XFRM_SOFT_EXPIRE; 432e3c0d047SFan Du } else if (tmo < next) { 4331da177e4SLinus Torvalds next = tmo; 434e3c0d047SFan Du x->xflags |= XFRM_SOFT_EXPIRE; 435e3c0d047SFan Du x->saved_tmo = tmo; 436e3c0d047SFan Du } 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds if (x->lft.soft_use_expires_seconds) { 4391da177e4SLinus Torvalds long tmo = x->lft.soft_use_expires_seconds + 4401da177e4SLinus Torvalds (x->curlft.use_time ? : now) - now; 4411da177e4SLinus Torvalds if (tmo <= 0) 4421da177e4SLinus Torvalds warn = 1; 4431da177e4SLinus Torvalds else if (tmo < next) 4441da177e4SLinus Torvalds next = tmo; 4451da177e4SLinus Torvalds } 4461da177e4SLinus Torvalds 4474666faabSHerbert Xu x->km.dying = warn; 4481da177e4SLinus Torvalds if (warn) 44953bc6b4dSJamal Hadi Salim km_state_expired(x, 0, 0); 4501da177e4SLinus Torvalds resched: 4519e0d57fdSYury Polyanskiy if (next != LONG_MAX){ 4529e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); 4539e0d57fdSYury Polyanskiy } 454a47f0ce0SDavid S. Miller 4551da177e4SLinus Torvalds goto out; 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds expired: 4585b8ef341SSteffen Klassert if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) 4591da177e4SLinus Torvalds x->km.state = XFRM_STATE_EXPIRED; 460161a09e7SJoy Latten 461161a09e7SJoy Latten err = __xfrm_state_delete(x); 4620806ae4cSNicolas Dichtel if (!err) 46353bc6b4dSJamal Hadi Salim km_state_expired(x, 1, 0); 4641da177e4SLinus Torvalds 465ab5f5e8bSJoy Latten xfrm_audit_state_delete(x, err ? 0 : 1, 4662532386fSEric Paris audit_get_loginuid(current), 4672532386fSEric Paris audit_get_sessionid(current), 0); 468161a09e7SJoy Latten 4691da177e4SLinus Torvalds out: 4701da177e4SLinus Torvalds spin_unlock(&x->lock); 4719e0d57fdSYury Polyanskiy return HRTIMER_NORESTART; 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds 4740ac84752SDavid S. Miller static void xfrm_replay_timer_handler(unsigned long data); 4750ac84752SDavid S. Miller 476673c09beSAlexey Dobriyan struct xfrm_state *xfrm_state_alloc(struct net *net) 4771da177e4SLinus Torvalds { 4781da177e4SLinus Torvalds struct xfrm_state *x; 4791da177e4SLinus Torvalds 4800da974f4SPanagiotis Issaris x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds if (x) { 483673c09beSAlexey Dobriyan write_pnet(&x->xs_net, net); 4841da177e4SLinus Torvalds atomic_set(&x->refcnt, 1); 4851da177e4SLinus Torvalds atomic_set(&x->tunnel_users, 0); 48612a169e7SHerbert Xu INIT_LIST_HEAD(&x->km.all); 4878f126e37SDavid S. Miller INIT_HLIST_NODE(&x->bydst); 4888f126e37SDavid S. Miller INIT_HLIST_NODE(&x->bysrc); 4898f126e37SDavid S. Miller INIT_HLIST_NODE(&x->byspi); 49099565a6cSFan Du tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, 49199565a6cSFan Du CLOCK_BOOTTIME, HRTIMER_MODE_ABS); 492b24b8a24SPavel Emelyanov setup_timer(&x->rtimer, xfrm_replay_timer_handler, 493b24b8a24SPavel Emelyanov (unsigned long)x); 4949d729f72SJames Morris x->curlft.add_time = get_seconds(); 4951da177e4SLinus Torvalds x->lft.soft_byte_limit = XFRM_INF; 4961da177e4SLinus Torvalds x->lft.soft_packet_limit = XFRM_INF; 4971da177e4SLinus Torvalds x->lft.hard_byte_limit = XFRM_INF; 4981da177e4SLinus Torvalds x->lft.hard_packet_limit = XFRM_INF; 499f8cd5488SJamal Hadi Salim x->replay_maxage = 0; 500f8cd5488SJamal Hadi Salim x->replay_maxdiff = 0; 501df9dcb45SKazunori MIYAZAWA x->inner_mode = NULL; 502df9dcb45SKazunori MIYAZAWA x->inner_mode_iaf = NULL; 5031da177e4SLinus Torvalds spin_lock_init(&x->lock); 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds return x; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_alloc); 5081da177e4SLinus Torvalds 5091da177e4SLinus Torvalds void __xfrm_state_destroy(struct xfrm_state *x) 5101da177e4SLinus Torvalds { 51198806f75SAlexey Dobriyan struct net *net = xs_net(x); 51298806f75SAlexey Dobriyan 513547b792cSIlpo Järvinen WARN_ON(x->km.state != XFRM_STATE_DEAD); 5141da177e4SLinus Torvalds 5151da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_gc_lock); 51698806f75SAlexey Dobriyan hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); 5171da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_gc_lock); 51898806f75SAlexey Dobriyan schedule_work(&net->xfrm.state_gc_work); 5191da177e4SLinus Torvalds } 5201da177e4SLinus Torvalds EXPORT_SYMBOL(__xfrm_state_destroy); 5211da177e4SLinus Torvalds 52253bc6b4dSJamal Hadi Salim int __xfrm_state_delete(struct xfrm_state *x) 5231da177e4SLinus Torvalds { 52498806f75SAlexey Dobriyan struct net *net = xs_net(x); 52526b15dadSJamal Hadi Salim int err = -ESRCH; 52626b15dadSJamal Hadi Salim 5271da177e4SLinus Torvalds if (x->km.state != XFRM_STATE_DEAD) { 5281da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 529283bc9f3SFan Du spin_lock(&net->xfrm.xfrm_state_lock); 53012a169e7SHerbert Xu list_del(&x->km.all); 5318f126e37SDavid S. Miller hlist_del(&x->bydst); 5328f126e37SDavid S. Miller hlist_del(&x->bysrc); 533a47f0ce0SDavid S. Miller if (x->id.spi) 5348f126e37SDavid S. Miller hlist_del(&x->byspi); 53598806f75SAlexey Dobriyan net->xfrm.state_num--; 536283bc9f3SFan Du spin_unlock(&net->xfrm.xfrm_state_lock); 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds /* All xfrm_state objects are created by xfrm_state_alloc. 5391da177e4SLinus Torvalds * The xfrm_state_alloc call gives a reference, and that 5401da177e4SLinus Torvalds * is what we are dropping here. 5411da177e4SLinus Torvalds */ 5425dba4797SPatrick McHardy xfrm_state_put(x); 54326b15dadSJamal Hadi Salim err = 0; 5441da177e4SLinus Torvalds } 5451da177e4SLinus Torvalds 54626b15dadSJamal Hadi Salim return err; 54726b15dadSJamal Hadi Salim } 54853bc6b4dSJamal Hadi Salim EXPORT_SYMBOL(__xfrm_state_delete); 54926b15dadSJamal Hadi Salim 55026b15dadSJamal Hadi Salim int xfrm_state_delete(struct xfrm_state *x) 5511da177e4SLinus Torvalds { 55226b15dadSJamal Hadi Salim int err; 55326b15dadSJamal Hadi Salim 5541da177e4SLinus Torvalds spin_lock_bh(&x->lock); 55526b15dadSJamal Hadi Salim err = __xfrm_state_delete(x); 5561da177e4SLinus Torvalds spin_unlock_bh(&x->lock); 55726b15dadSJamal Hadi Salim 55826b15dadSJamal Hadi Salim return err; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_delete); 5611da177e4SLinus Torvalds 5624aa2e62cSJoy Latten #ifdef CONFIG_SECURITY_NETWORK_XFRM 5634aa2e62cSJoy Latten static inline int 5640e602451SAlexey Dobriyan xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) 5651da177e4SLinus Torvalds { 5664aa2e62cSJoy Latten int i, err = 0; 5674aa2e62cSJoy Latten 5680e602451SAlexey Dobriyan for (i = 0; i <= net->xfrm.state_hmask; i++) { 5694aa2e62cSJoy Latten struct xfrm_state *x; 5704aa2e62cSJoy Latten 571b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { 5724aa2e62cSJoy Latten if (xfrm_id_proto_match(x->id.proto, proto) && 5734aa2e62cSJoy Latten (err = security_xfrm_state_delete(x)) != 0) { 574ab5f5e8bSJoy Latten xfrm_audit_state_delete(x, 0, 575ab5f5e8bSJoy Latten audit_info->loginuid, 5762532386fSEric Paris audit_info->sessionid, 577ab5f5e8bSJoy Latten audit_info->secid); 5784aa2e62cSJoy Latten return err; 5794aa2e62cSJoy Latten } 5804aa2e62cSJoy Latten } 5814aa2e62cSJoy Latten } 5824aa2e62cSJoy Latten 5834aa2e62cSJoy Latten return err; 5844aa2e62cSJoy Latten } 5854aa2e62cSJoy Latten #else 5864aa2e62cSJoy Latten static inline int 5870e602451SAlexey Dobriyan xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) 5884aa2e62cSJoy Latten { 5894aa2e62cSJoy Latten return 0; 5904aa2e62cSJoy Latten } 5914aa2e62cSJoy Latten #endif 5924aa2e62cSJoy Latten 5930e602451SAlexey Dobriyan int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info) 5944aa2e62cSJoy Latten { 5959e64cc95SJamal Hadi Salim int i, err = 0, cnt = 0; 5961da177e4SLinus Torvalds 597283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 5980e602451SAlexey Dobriyan err = xfrm_state_flush_secctx_check(net, proto, audit_info); 5994aa2e62cSJoy Latten if (err) 6004aa2e62cSJoy Latten goto out; 6014aa2e62cSJoy Latten 6029e64cc95SJamal Hadi Salim err = -ESRCH; 6030e602451SAlexey Dobriyan for (i = 0; i <= net->xfrm.state_hmask; i++) { 6048f126e37SDavid S. Miller struct xfrm_state *x; 6051da177e4SLinus Torvalds restart: 606b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { 6071da177e4SLinus Torvalds if (!xfrm_state_kern(x) && 6085794708fSMasahide NAKAMURA xfrm_id_proto_match(x->id.proto, proto)) { 6091da177e4SLinus Torvalds xfrm_state_hold(x); 610283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 6111da177e4SLinus Torvalds 612161a09e7SJoy Latten err = xfrm_state_delete(x); 613ab5f5e8bSJoy Latten xfrm_audit_state_delete(x, err ? 0 : 1, 614ab5f5e8bSJoy Latten audit_info->loginuid, 6152532386fSEric Paris audit_info->sessionid, 616ab5f5e8bSJoy Latten audit_info->secid); 6171da177e4SLinus Torvalds xfrm_state_put(x); 6189e64cc95SJamal Hadi Salim if (!err) 6199e64cc95SJamal Hadi Salim cnt++; 6201da177e4SLinus Torvalds 621283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 6221da177e4SLinus Torvalds goto restart; 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds } 6269e64cc95SJamal Hadi Salim if (cnt) 6274aa2e62cSJoy Latten err = 0; 6284aa2e62cSJoy Latten 6294aa2e62cSJoy Latten out: 630283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 6314aa2e62cSJoy Latten return err; 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_flush); 6341da177e4SLinus Torvalds 635e071041bSAlexey Dobriyan void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) 63628d8909bSJamal Hadi Salim { 637283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 638e071041bSAlexey Dobriyan si->sadcnt = net->xfrm.state_num; 639e071041bSAlexey Dobriyan si->sadhcnt = net->xfrm.state_hmask; 64028d8909bSJamal Hadi Salim si->sadhmcnt = xfrm_state_hashmax; 641283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 64228d8909bSJamal Hadi Salim } 64328d8909bSJamal Hadi Salim EXPORT_SYMBOL(xfrm_sad_getinfo); 64428d8909bSJamal Hadi Salim 6451da177e4SLinus Torvalds static int 6461a898592SDavid S. Miller xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, 64704686013SDavid S. Miller const struct xfrm_tmpl *tmpl, 64833765d06SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 6491da177e4SLinus Torvalds unsigned short family) 6501da177e4SLinus Torvalds { 6511da177e4SLinus Torvalds struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); 6521da177e4SLinus Torvalds if (!afinfo) 6531da177e4SLinus Torvalds return -1; 6548444cf71SThomas Egerer afinfo->init_tempsel(&x->sel, fl); 6558444cf71SThomas Egerer 6568444cf71SThomas Egerer if (family != tmpl->encap_family) { 6578444cf71SThomas Egerer xfrm_state_put_afinfo(afinfo); 6588444cf71SThomas Egerer afinfo = xfrm_state_get_afinfo(tmpl->encap_family); 6598444cf71SThomas Egerer if (!afinfo) 6608444cf71SThomas Egerer return -1; 6618444cf71SThomas Egerer } 6628444cf71SThomas Egerer afinfo->init_temprop(x, tmpl, daddr, saddr); 6631da177e4SLinus Torvalds xfrm_state_put_afinfo(afinfo); 6641da177e4SLinus Torvalds return 0; 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds 6679aa60088SDavid S. Miller static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, 6689aa60088SDavid S. Miller const xfrm_address_t *daddr, 6699aa60088SDavid S. Miller __be32 spi, u8 proto, 6709aa60088SDavid S. Miller unsigned short family) 671edcd5821SDavid S. Miller { 672221df1edSAlexey Dobriyan unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); 673edcd5821SDavid S. Miller struct xfrm_state *x; 674edcd5821SDavid S. Miller 675b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_byspi+h, byspi) { 676edcd5821SDavid S. Miller if (x->props.family != family || 677edcd5821SDavid S. Miller x->id.spi != spi || 6781802571bSWei Yongjun x->id.proto != proto || 67970e94e66SYOSHIFUJI Hideaki / 吉藤英明 !xfrm_addr_equal(&x->id.daddr, daddr, family)) 680edcd5821SDavid S. Miller continue; 681edcd5821SDavid S. Miller 6823d6acfa7SJamal Hadi Salim if ((mark & x->mark.m) != x->mark.v) 6833d6acfa7SJamal Hadi Salim continue; 684edcd5821SDavid S. Miller xfrm_state_hold(x); 685edcd5821SDavid S. Miller return x; 686edcd5821SDavid S. Miller } 687edcd5821SDavid S. Miller 688edcd5821SDavid S. Miller return NULL; 689edcd5821SDavid S. Miller } 690edcd5821SDavid S. Miller 6919aa60088SDavid S. Miller static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, 6929aa60088SDavid S. Miller const xfrm_address_t *daddr, 6939aa60088SDavid S. Miller const xfrm_address_t *saddr, 6949aa60088SDavid S. Miller u8 proto, unsigned short family) 695edcd5821SDavid S. Miller { 696221df1edSAlexey Dobriyan unsigned int h = xfrm_src_hash(net, daddr, saddr, family); 697edcd5821SDavid S. Miller struct xfrm_state *x; 698edcd5821SDavid S. Miller 699b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { 700edcd5821SDavid S. Miller if (x->props.family != family || 7011802571bSWei Yongjun x->id.proto != proto || 70270e94e66SYOSHIFUJI Hideaki / 吉藤英明 !xfrm_addr_equal(&x->id.daddr, daddr, family) || 70370e94e66SYOSHIFUJI Hideaki / 吉藤英明 !xfrm_addr_equal(&x->props.saddr, saddr, family)) 704edcd5821SDavid S. Miller continue; 705edcd5821SDavid S. Miller 7063d6acfa7SJamal Hadi Salim if ((mark & x->mark.m) != x->mark.v) 7073d6acfa7SJamal Hadi Salim continue; 708edcd5821SDavid S. Miller xfrm_state_hold(x); 709edcd5821SDavid S. Miller return x; 710edcd5821SDavid S. Miller } 711edcd5821SDavid S. Miller 712edcd5821SDavid S. Miller return NULL; 713edcd5821SDavid S. Miller } 714edcd5821SDavid S. Miller 715edcd5821SDavid S. Miller static inline struct xfrm_state * 716edcd5821SDavid S. Miller __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) 717edcd5821SDavid S. Miller { 718221df1edSAlexey Dobriyan struct net *net = xs_net(x); 719bd55775cSJamal Hadi Salim u32 mark = x->mark.v & x->mark.m; 720221df1edSAlexey Dobriyan 721edcd5821SDavid S. Miller if (use_spi) 722bd55775cSJamal Hadi Salim return __xfrm_state_lookup(net, mark, &x->id.daddr, 723bd55775cSJamal Hadi Salim x->id.spi, x->id.proto, family); 724edcd5821SDavid S. Miller else 725bd55775cSJamal Hadi Salim return __xfrm_state_lookup_byaddr(net, mark, 726bd55775cSJamal Hadi Salim &x->id.daddr, 727edcd5821SDavid S. Miller &x->props.saddr, 728edcd5821SDavid S. Miller x->id.proto, family); 729edcd5821SDavid S. Miller } 730edcd5821SDavid S. Miller 73198806f75SAlexey Dobriyan static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) 7322fab22f2SPatrick McHardy { 7332fab22f2SPatrick McHardy if (have_hash_collision && 73498806f75SAlexey Dobriyan (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && 73598806f75SAlexey Dobriyan net->xfrm.state_num > net->xfrm.state_hmask) 73698806f75SAlexey Dobriyan schedule_work(&net->xfrm.state_hash_work); 7372fab22f2SPatrick McHardy } 7382fab22f2SPatrick McHardy 73908ec9af1SDavid S. Miller static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, 7404a08ab0fSDavid S. Miller const struct flowi *fl, unsigned short family, 74108ec9af1SDavid S. Miller struct xfrm_state **best, int *acq_in_progress, 74208ec9af1SDavid S. Miller int *error) 74308ec9af1SDavid S. Miller { 74408ec9af1SDavid S. Miller /* Resolution logic: 74508ec9af1SDavid S. Miller * 1. There is a valid state with matching selector. Done. 74608ec9af1SDavid S. Miller * 2. Valid state with inappropriate selector. Skip. 74708ec9af1SDavid S. Miller * 74808ec9af1SDavid S. Miller * Entering area of "sysdeps". 74908ec9af1SDavid S. Miller * 75008ec9af1SDavid S. Miller * 3. If state is not valid, selector is temporary, it selects 75108ec9af1SDavid S. Miller * only session which triggered previous resolution. Key 75208ec9af1SDavid S. Miller * manager will do something to install a state with proper 75308ec9af1SDavid S. Miller * selector. 75408ec9af1SDavid S. Miller */ 75508ec9af1SDavid S. Miller if (x->km.state == XFRM_STATE_VALID) { 75608ec9af1SDavid S. Miller if ((x->sel.family && 75708ec9af1SDavid S. Miller !xfrm_selector_match(&x->sel, fl, x->sel.family)) || 75808ec9af1SDavid S. Miller !security_xfrm_state_pol_flow_match(x, pol, fl)) 75908ec9af1SDavid S. Miller return; 76008ec9af1SDavid S. Miller 76108ec9af1SDavid S. Miller if (!*best || 76208ec9af1SDavid S. Miller (*best)->km.dying > x->km.dying || 76308ec9af1SDavid S. Miller ((*best)->km.dying == x->km.dying && 76408ec9af1SDavid S. Miller (*best)->curlft.add_time < x->curlft.add_time)) 76508ec9af1SDavid S. Miller *best = x; 76608ec9af1SDavid S. Miller } else if (x->km.state == XFRM_STATE_ACQ) { 76708ec9af1SDavid S. Miller *acq_in_progress = 1; 76808ec9af1SDavid S. Miller } else if (x->km.state == XFRM_STATE_ERROR || 76908ec9af1SDavid S. Miller x->km.state == XFRM_STATE_EXPIRED) { 77008ec9af1SDavid S. Miller if (xfrm_selector_match(&x->sel, fl, x->sel.family) && 77108ec9af1SDavid S. Miller security_xfrm_state_pol_flow_match(x, pol, fl)) 77208ec9af1SDavid S. Miller *error = -ESRCH; 77308ec9af1SDavid S. Miller } 77408ec9af1SDavid S. Miller } 77508ec9af1SDavid S. Miller 7761da177e4SLinus Torvalds struct xfrm_state * 77733765d06SDavid S. Miller xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, 778b520e9f6SDavid S. Miller const struct flowi *fl, struct xfrm_tmpl *tmpl, 7791da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 7801da177e4SLinus Torvalds unsigned short family) 7811da177e4SLinus Torvalds { 78208ec9af1SDavid S. Miller static xfrm_address_t saddr_wildcard = { }; 7835447c5e4SAlexey Dobriyan struct net *net = xp_net(pol); 7846a783c90SNicolas Dichtel unsigned int h, h_wildcard; 78537b08e34SDavid S. Miller struct xfrm_state *x, *x0, *to_put; 7861da177e4SLinus Torvalds int acquire_in_progress = 0; 7871da177e4SLinus Torvalds int error = 0; 7881da177e4SLinus Torvalds struct xfrm_state *best = NULL; 789bd55775cSJamal Hadi Salim u32 mark = pol->mark.v & pol->mark.m; 7908444cf71SThomas Egerer unsigned short encap_family = tmpl->encap_family; 7911da177e4SLinus Torvalds 79237b08e34SDavid S. Miller to_put = NULL; 79337b08e34SDavid S. Miller 794283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 7958444cf71SThomas Egerer h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); 796b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { 7978444cf71SThomas Egerer if (x->props.family == encap_family && 7981da177e4SLinus Torvalds x->props.reqid == tmpl->reqid && 7993d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 800fbd9a5b4SMasahide NAKAMURA !(x->props.flags & XFRM_STATE_WILDRECV) && 8018444cf71SThomas Egerer xfrm_state_addr_check(x, daddr, saddr, encap_family) && 8021da177e4SLinus Torvalds tmpl->mode == x->props.mode && 8031da177e4SLinus Torvalds tmpl->id.proto == x->id.proto && 80408ec9af1SDavid S. Miller (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) 8051f673c5fSDavid S. Miller xfrm_state_look_at(pol, x, fl, encap_family, 80608ec9af1SDavid S. Miller &best, &acquire_in_progress, &error); 8071da177e4SLinus Torvalds } 8086f115638SFan Du if (best || acquire_in_progress) 80908ec9af1SDavid S. Miller goto found; 81008ec9af1SDavid S. Miller 8118444cf71SThomas Egerer h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); 812b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bydst+h_wildcard, bydst) { 8138444cf71SThomas Egerer if (x->props.family == encap_family && 81408ec9af1SDavid S. Miller x->props.reqid == tmpl->reqid && 8153d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 81608ec9af1SDavid S. Miller !(x->props.flags & XFRM_STATE_WILDRECV) && 817f59bbdfaSFan Du xfrm_addr_equal(&x->id.daddr, daddr, encap_family) && 81808ec9af1SDavid S. Miller tmpl->mode == x->props.mode && 81908ec9af1SDavid S. Miller tmpl->id.proto == x->id.proto && 82008ec9af1SDavid S. Miller (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) 8211f673c5fSDavid S. Miller xfrm_state_look_at(pol, x, fl, encap_family, 82208ec9af1SDavid S. Miller &best, &acquire_in_progress, &error); 8231da177e4SLinus Torvalds } 8241da177e4SLinus Torvalds 82508ec9af1SDavid S. Miller found: 8261da177e4SLinus Torvalds x = best; 8271da177e4SLinus Torvalds if (!x && !error && !acquire_in_progress) { 8285c5d281aSPatrick McHardy if (tmpl->id.spi && 829bd55775cSJamal Hadi Salim (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, 8308444cf71SThomas Egerer tmpl->id.proto, encap_family)) != NULL) { 83137b08e34SDavid S. Miller to_put = x0; 8321da177e4SLinus Torvalds error = -EEXIST; 8331da177e4SLinus Torvalds goto out; 8341da177e4SLinus Torvalds } 8355447c5e4SAlexey Dobriyan x = xfrm_state_alloc(net); 8361da177e4SLinus Torvalds if (x == NULL) { 8371da177e4SLinus Torvalds error = -ENOMEM; 8381da177e4SLinus Torvalds goto out; 8391da177e4SLinus Torvalds } 8408444cf71SThomas Egerer /* Initialize temporary state matching only 8411da177e4SLinus Torvalds * to current session. */ 8428444cf71SThomas Egerer xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); 843bd55775cSJamal Hadi Salim memcpy(&x->mark, &pol->mark, sizeof(x->mark)); 8441da177e4SLinus Torvalds 8451d28f42cSDavid S. Miller error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); 846e0d1caa7SVenkat Yekkirala if (error) { 847e0d1caa7SVenkat Yekkirala x->km.state = XFRM_STATE_DEAD; 84837b08e34SDavid S. Miller to_put = x; 849e0d1caa7SVenkat Yekkirala x = NULL; 850e0d1caa7SVenkat Yekkirala goto out; 851e0d1caa7SVenkat Yekkirala } 852e0d1caa7SVenkat Yekkirala 8531da177e4SLinus Torvalds if (km_query(x, tmpl, pol) == 0) { 8541da177e4SLinus Torvalds x->km.state = XFRM_STATE_ACQ; 8555447c5e4SAlexey Dobriyan list_add(&x->km.all, &net->xfrm.state_all); 8565447c5e4SAlexey Dobriyan hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); 8578444cf71SThomas Egerer h = xfrm_src_hash(net, daddr, saddr, encap_family); 8585447c5e4SAlexey Dobriyan hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); 8591da177e4SLinus Torvalds if (x->id.spi) { 8608444cf71SThomas Egerer h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); 8615447c5e4SAlexey Dobriyan hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); 8621da177e4SLinus Torvalds } 863b27aeadbSAlexey Dobriyan x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; 8649e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); 8655447c5e4SAlexey Dobriyan net->xfrm.state_num++; 8665447c5e4SAlexey Dobriyan xfrm_hash_grow_check(net, x->bydst.next != NULL); 8671da177e4SLinus Torvalds } else { 8681da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 86937b08e34SDavid S. Miller to_put = x; 8701da177e4SLinus Torvalds x = NULL; 8711da177e4SLinus Torvalds error = -ESRCH; 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds } 8741da177e4SLinus Torvalds out: 8751da177e4SLinus Torvalds if (x) 8761da177e4SLinus Torvalds xfrm_state_hold(x); 8771da177e4SLinus Torvalds else 8781da177e4SLinus Torvalds *err = acquire_in_progress ? -EAGAIN : error; 879283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 88037b08e34SDavid S. Miller if (to_put) 88137b08e34SDavid S. Miller xfrm_state_put(to_put); 8821da177e4SLinus Torvalds return x; 8831da177e4SLinus Torvalds } 8841da177e4SLinus Torvalds 885628529b6SJamal Hadi Salim struct xfrm_state * 886bd55775cSJamal Hadi Salim xfrm_stateonly_find(struct net *net, u32 mark, 8875447c5e4SAlexey Dobriyan xfrm_address_t *daddr, xfrm_address_t *saddr, 888628529b6SJamal Hadi Salim unsigned short family, u8 mode, u8 proto, u32 reqid) 889628529b6SJamal Hadi Salim { 8904bda4f25SPavel Emelyanov unsigned int h; 891628529b6SJamal Hadi Salim struct xfrm_state *rx = NULL, *x = NULL; 892628529b6SJamal Hadi Salim 893283bc9f3SFan Du spin_lock(&net->xfrm.xfrm_state_lock); 8945447c5e4SAlexey Dobriyan h = xfrm_dst_hash(net, daddr, saddr, reqid, family); 895b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { 896628529b6SJamal Hadi Salim if (x->props.family == family && 897628529b6SJamal Hadi Salim x->props.reqid == reqid && 8983d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 899628529b6SJamal Hadi Salim !(x->props.flags & XFRM_STATE_WILDRECV) && 900628529b6SJamal Hadi Salim xfrm_state_addr_check(x, daddr, saddr, family) && 901628529b6SJamal Hadi Salim mode == x->props.mode && 902628529b6SJamal Hadi Salim proto == x->id.proto && 903628529b6SJamal Hadi Salim x->km.state == XFRM_STATE_VALID) { 904628529b6SJamal Hadi Salim rx = x; 905628529b6SJamal Hadi Salim break; 906628529b6SJamal Hadi Salim } 907628529b6SJamal Hadi Salim } 908628529b6SJamal Hadi Salim 909628529b6SJamal Hadi Salim if (rx) 910628529b6SJamal Hadi Salim xfrm_state_hold(rx); 911283bc9f3SFan Du spin_unlock(&net->xfrm.xfrm_state_lock); 912628529b6SJamal Hadi Salim 913628529b6SJamal Hadi Salim 914628529b6SJamal Hadi Salim return rx; 915628529b6SJamal Hadi Salim } 916628529b6SJamal Hadi Salim EXPORT_SYMBOL(xfrm_stateonly_find); 917628529b6SJamal Hadi Salim 9181da177e4SLinus Torvalds static void __xfrm_state_insert(struct xfrm_state *x) 9191da177e4SLinus Torvalds { 92098806f75SAlexey Dobriyan struct net *net = xs_net(x); 921a624c108SDavid S. Miller unsigned int h; 9221da177e4SLinus Torvalds 92398806f75SAlexey Dobriyan list_add(&x->km.all, &net->xfrm.state_all); 9244c563f76STimo Teras 92598806f75SAlexey Dobriyan h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, 926c1969f29SDavid S. Miller x->props.reqid, x->props.family); 92798806f75SAlexey Dobriyan hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); 9281da177e4SLinus Torvalds 92998806f75SAlexey Dobriyan h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); 93098806f75SAlexey Dobriyan hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); 9316c44e6b7SMasahide NAKAMURA 9327b4dc360SMasahide NAKAMURA if (x->id.spi) { 93398806f75SAlexey Dobriyan h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, 9346c44e6b7SMasahide NAKAMURA x->props.family); 9351da177e4SLinus Torvalds 93698806f75SAlexey Dobriyan hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); 9376c44e6b7SMasahide NAKAMURA } 9381da177e4SLinus Torvalds 9399e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); 940a47f0ce0SDavid S. Miller if (x->replay_maxage) 941a47f0ce0SDavid S. Miller mod_timer(&x->rtimer, jiffies + x->replay_maxage); 942f8cd5488SJamal Hadi Salim 94398806f75SAlexey Dobriyan net->xfrm.state_num++; 944f034b5d4SDavid S. Miller 94598806f75SAlexey Dobriyan xfrm_hash_grow_check(net, x->bydst.next != NULL); 9461da177e4SLinus Torvalds } 9471da177e4SLinus Torvalds 948283bc9f3SFan Du /* net->xfrm.xfrm_state_lock is held */ 949c7f5ea3aSDavid S. Miller static void __xfrm_state_bump_genids(struct xfrm_state *xnew) 950c7f5ea3aSDavid S. Miller { 95198806f75SAlexey Dobriyan struct net *net = xs_net(xnew); 952c7f5ea3aSDavid S. Miller unsigned short family = xnew->props.family; 953c7f5ea3aSDavid S. Miller u32 reqid = xnew->props.reqid; 954c7f5ea3aSDavid S. Miller struct xfrm_state *x; 955c7f5ea3aSDavid S. Miller unsigned int h; 9563d6acfa7SJamal Hadi Salim u32 mark = xnew->mark.v & xnew->mark.m; 957c7f5ea3aSDavid S. Miller 95898806f75SAlexey Dobriyan h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); 959b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { 960c7f5ea3aSDavid S. Miller if (x->props.family == family && 961c7f5ea3aSDavid S. Miller x->props.reqid == reqid && 9623d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 96370e94e66SYOSHIFUJI Hideaki / 吉藤英明 xfrm_addr_equal(&x->id.daddr, &xnew->id.daddr, family) && 96470e94e66SYOSHIFUJI Hideaki / 吉藤英明 xfrm_addr_equal(&x->props.saddr, &xnew->props.saddr, family)) 96534996cb9SHerbert Xu x->genid++; 966c7f5ea3aSDavid S. Miller } 967c7f5ea3aSDavid S. Miller } 968c7f5ea3aSDavid S. Miller 9691da177e4SLinus Torvalds void xfrm_state_insert(struct xfrm_state *x) 9701da177e4SLinus Torvalds { 971283bc9f3SFan Du struct net *net = xs_net(x); 972283bc9f3SFan Du 973283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 974c7f5ea3aSDavid S. Miller __xfrm_state_bump_genids(x); 9751da177e4SLinus Torvalds __xfrm_state_insert(x); 976283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_insert); 9791da177e4SLinus Torvalds 980283bc9f3SFan Du /* net->xfrm.xfrm_state_lock is held */ 981e473fcb4SMathias Krause static struct xfrm_state *__find_acq_core(struct net *net, 982e473fcb4SMathias Krause const struct xfrm_mark *m, 983a70486f0SDavid S. Miller unsigned short family, u8 mode, 984a70486f0SDavid S. Miller u32 reqid, u8 proto, 985a70486f0SDavid S. Miller const xfrm_address_t *daddr, 986e473fcb4SMathias Krause const xfrm_address_t *saddr, 987e473fcb4SMathias Krause int create) 9882770834cSDavid S. Miller { 9895447c5e4SAlexey Dobriyan unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); 9902770834cSDavid S. Miller struct xfrm_state *x; 9913d6acfa7SJamal Hadi Salim u32 mark = m->v & m->m; 9922770834cSDavid S. Miller 993b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { 9942770834cSDavid S. Miller if (x->props.reqid != reqid || 9952770834cSDavid S. Miller x->props.mode != mode || 9962770834cSDavid S. Miller x->props.family != family || 9972770834cSDavid S. Miller x->km.state != XFRM_STATE_ACQ || 99875e252d9SJoy Latten x->id.spi != 0 || 9991802571bSWei Yongjun x->id.proto != proto || 10003d6acfa7SJamal Hadi Salim (mark & x->mark.m) != x->mark.v || 100170e94e66SYOSHIFUJI Hideaki / 吉藤英明 !xfrm_addr_equal(&x->id.daddr, daddr, family) || 100270e94e66SYOSHIFUJI Hideaki / 吉藤英明 !xfrm_addr_equal(&x->props.saddr, saddr, family)) 10032770834cSDavid S. Miller continue; 10042770834cSDavid S. Miller 10052770834cSDavid S. Miller xfrm_state_hold(x); 10062770834cSDavid S. Miller return x; 10072770834cSDavid S. Miller } 10082770834cSDavid S. Miller 10092770834cSDavid S. Miller if (!create) 10102770834cSDavid S. Miller return NULL; 10112770834cSDavid S. Miller 10125447c5e4SAlexey Dobriyan x = xfrm_state_alloc(net); 10132770834cSDavid S. Miller if (likely(x)) { 10142770834cSDavid S. Miller switch (family) { 10152770834cSDavid S. Miller case AF_INET: 10162770834cSDavid S. Miller x->sel.daddr.a4 = daddr->a4; 10172770834cSDavid S. Miller x->sel.saddr.a4 = saddr->a4; 10182770834cSDavid S. Miller x->sel.prefixlen_d = 32; 10192770834cSDavid S. Miller x->sel.prefixlen_s = 32; 10202770834cSDavid S. Miller x->props.saddr.a4 = saddr->a4; 10212770834cSDavid S. Miller x->id.daddr.a4 = daddr->a4; 10222770834cSDavid S. Miller break; 10232770834cSDavid S. Miller 10242770834cSDavid S. Miller case AF_INET6: 10254e3fd7a0SAlexey Dobriyan *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr; 10264e3fd7a0SAlexey Dobriyan *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr; 10272770834cSDavid S. Miller x->sel.prefixlen_d = 128; 10282770834cSDavid S. Miller x->sel.prefixlen_s = 128; 10294e3fd7a0SAlexey Dobriyan *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr; 10304e3fd7a0SAlexey Dobriyan *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr; 10312770834cSDavid S. Miller break; 10323ff50b79SStephen Hemminger } 10332770834cSDavid S. Miller 10342770834cSDavid S. Miller x->km.state = XFRM_STATE_ACQ; 10352770834cSDavid S. Miller x->id.proto = proto; 10362770834cSDavid S. Miller x->props.family = family; 10372770834cSDavid S. Miller x->props.mode = mode; 10382770834cSDavid S. Miller x->props.reqid = reqid; 1039bd55775cSJamal Hadi Salim x->mark.v = m->v; 1040bd55775cSJamal Hadi Salim x->mark.m = m->m; 1041b27aeadbSAlexey Dobriyan x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; 10422770834cSDavid S. Miller xfrm_state_hold(x); 10439e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); 10445447c5e4SAlexey Dobriyan list_add(&x->km.all, &net->xfrm.state_all); 10455447c5e4SAlexey Dobriyan hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); 10465447c5e4SAlexey Dobriyan h = xfrm_src_hash(net, daddr, saddr, family); 10475447c5e4SAlexey Dobriyan hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); 1048918049f0SDavid S. Miller 10495447c5e4SAlexey Dobriyan net->xfrm.state_num++; 1050918049f0SDavid S. Miller 10515447c5e4SAlexey Dobriyan xfrm_hash_grow_check(net, x->bydst.next != NULL); 10522770834cSDavid S. Miller } 10532770834cSDavid S. Miller 10542770834cSDavid S. Miller return x; 10552770834cSDavid S. Miller } 10562770834cSDavid S. Miller 1057bd55775cSJamal Hadi Salim static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds int xfrm_state_add(struct xfrm_state *x) 10601da177e4SLinus Torvalds { 10615447c5e4SAlexey Dobriyan struct net *net = xs_net(x); 106237b08e34SDavid S. Miller struct xfrm_state *x1, *to_put; 10631da177e4SLinus Torvalds int family; 10641da177e4SLinus Torvalds int err; 1065bd55775cSJamal Hadi Salim u32 mark = x->mark.v & x->mark.m; 1066eb2971b6SMasahide NAKAMURA int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); 10671da177e4SLinus Torvalds 10681da177e4SLinus Torvalds family = x->props.family; 10691da177e4SLinus Torvalds 107037b08e34SDavid S. Miller to_put = NULL; 107137b08e34SDavid S. Miller 1072283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 10731da177e4SLinus Torvalds 1074edcd5821SDavid S. Miller x1 = __xfrm_state_locate(x, use_spi, family); 10751da177e4SLinus Torvalds if (x1) { 107637b08e34SDavid S. Miller to_put = x1; 10771da177e4SLinus Torvalds x1 = NULL; 10781da177e4SLinus Torvalds err = -EEXIST; 10791da177e4SLinus Torvalds goto out; 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds 1082eb2971b6SMasahide NAKAMURA if (use_spi && x->km.seq) { 1083bd55775cSJamal Hadi Salim x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); 108475e252d9SJoy Latten if (x1 && ((x1->id.proto != x->id.proto) || 108570e94e66SYOSHIFUJI Hideaki / 吉藤英明 !xfrm_addr_equal(&x1->id.daddr, &x->id.daddr, family))) { 108637b08e34SDavid S. Miller to_put = x1; 10871da177e4SLinus Torvalds x1 = NULL; 10881da177e4SLinus Torvalds } 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds 1091eb2971b6SMasahide NAKAMURA if (use_spi && !x1) 1092bd55775cSJamal Hadi Salim x1 = __find_acq_core(net, &x->mark, family, x->props.mode, 1093bd55775cSJamal Hadi Salim x->props.reqid, x->id.proto, 10941da177e4SLinus Torvalds &x->id.daddr, &x->props.saddr, 0); 10951da177e4SLinus Torvalds 1096c7f5ea3aSDavid S. Miller __xfrm_state_bump_genids(x); 10971da177e4SLinus Torvalds __xfrm_state_insert(x); 10981da177e4SLinus Torvalds err = 0; 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds out: 1101283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 11021da177e4SLinus Torvalds 11031da177e4SLinus Torvalds if (x1) { 11041da177e4SLinus Torvalds xfrm_state_delete(x1); 11051da177e4SLinus Torvalds xfrm_state_put(x1); 11061da177e4SLinus Torvalds } 11071da177e4SLinus Torvalds 110837b08e34SDavid S. Miller if (to_put) 110937b08e34SDavid S. Miller xfrm_state_put(to_put); 111037b08e34SDavid S. Miller 11111da177e4SLinus Torvalds return err; 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_add); 11141da177e4SLinus Torvalds 111580c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 11166666351dSEric Dumazet static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) 111780c9abaaSShinta Sugimoto { 111898806f75SAlexey Dobriyan struct net *net = xs_net(orig); 111980c9abaaSShinta Sugimoto int err = -ENOMEM; 112098806f75SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 112180c9abaaSShinta Sugimoto if (!x) 1122553f9118SHerbert Xu goto out; 112380c9abaaSShinta Sugimoto 112480c9abaaSShinta Sugimoto memcpy(&x->id, &orig->id, sizeof(x->id)); 112580c9abaaSShinta Sugimoto memcpy(&x->sel, &orig->sel, sizeof(x->sel)); 112680c9abaaSShinta Sugimoto memcpy(&x->lft, &orig->lft, sizeof(x->lft)); 112780c9abaaSShinta Sugimoto x->props.mode = orig->props.mode; 112880c9abaaSShinta Sugimoto x->props.replay_window = orig->props.replay_window; 112980c9abaaSShinta Sugimoto x->props.reqid = orig->props.reqid; 113080c9abaaSShinta Sugimoto x->props.family = orig->props.family; 113180c9abaaSShinta Sugimoto x->props.saddr = orig->props.saddr; 113280c9abaaSShinta Sugimoto 113380c9abaaSShinta Sugimoto if (orig->aalg) { 11344447bb33SMartin Willi x->aalg = xfrm_algo_auth_clone(orig->aalg); 113580c9abaaSShinta Sugimoto if (!x->aalg) 113680c9abaaSShinta Sugimoto goto error; 113780c9abaaSShinta Sugimoto } 113880c9abaaSShinta Sugimoto x->props.aalgo = orig->props.aalgo; 113980c9abaaSShinta Sugimoto 114080c9abaaSShinta Sugimoto if (orig->ealg) { 114180c9abaaSShinta Sugimoto x->ealg = xfrm_algo_clone(orig->ealg); 114280c9abaaSShinta Sugimoto if (!x->ealg) 114380c9abaaSShinta Sugimoto goto error; 114480c9abaaSShinta Sugimoto } 114580c9abaaSShinta Sugimoto x->props.ealgo = orig->props.ealgo; 114680c9abaaSShinta Sugimoto 114780c9abaaSShinta Sugimoto if (orig->calg) { 114880c9abaaSShinta Sugimoto x->calg = xfrm_algo_clone(orig->calg); 114980c9abaaSShinta Sugimoto if (!x->calg) 115080c9abaaSShinta Sugimoto goto error; 115180c9abaaSShinta Sugimoto } 115280c9abaaSShinta Sugimoto x->props.calgo = orig->props.calgo; 115380c9abaaSShinta Sugimoto 115480c9abaaSShinta Sugimoto if (orig->encap) { 115580c9abaaSShinta Sugimoto x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); 115680c9abaaSShinta Sugimoto if (!x->encap) 115780c9abaaSShinta Sugimoto goto error; 115880c9abaaSShinta Sugimoto } 115980c9abaaSShinta Sugimoto 116080c9abaaSShinta Sugimoto if (orig->coaddr) { 116180c9abaaSShinta Sugimoto x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), 116280c9abaaSShinta Sugimoto GFP_KERNEL); 116380c9abaaSShinta Sugimoto if (!x->coaddr) 116480c9abaaSShinta Sugimoto goto error; 116580c9abaaSShinta Sugimoto } 116680c9abaaSShinta Sugimoto 1167af2f464eSSteffen Klassert if (orig->replay_esn) { 1168af2f464eSSteffen Klassert err = xfrm_replay_clone(x, orig); 1169af2f464eSSteffen Klassert if (err) 1170af2f464eSSteffen Klassert goto error; 1171af2f464eSSteffen Klassert } 1172af2f464eSSteffen Klassert 1173bd55775cSJamal Hadi Salim memcpy(&x->mark, &orig->mark, sizeof(x->mark)); 1174bd55775cSJamal Hadi Salim 117580c9abaaSShinta Sugimoto err = xfrm_init_state(x); 117680c9abaaSShinta Sugimoto if (err) 117780c9abaaSShinta Sugimoto goto error; 117880c9abaaSShinta Sugimoto 117980c9abaaSShinta Sugimoto x->props.flags = orig->props.flags; 1180a947b0a9SNicolas Dichtel x->props.extra_flags = orig->props.extra_flags; 118180c9abaaSShinta Sugimoto 118280c9abaaSShinta Sugimoto x->curlft.add_time = orig->curlft.add_time; 118380c9abaaSShinta Sugimoto x->km.state = orig->km.state; 118480c9abaaSShinta Sugimoto x->km.seq = orig->km.seq; 118580c9abaaSShinta Sugimoto 118680c9abaaSShinta Sugimoto return x; 118780c9abaaSShinta Sugimoto 118880c9abaaSShinta Sugimoto error: 1189553f9118SHerbert Xu xfrm_state_put(x); 1190553f9118SHerbert Xu out: 119180c9abaaSShinta Sugimoto if (errp) 119280c9abaaSShinta Sugimoto *errp = err; 119380c9abaaSShinta Sugimoto return NULL; 119480c9abaaSShinta Sugimoto } 119580c9abaaSShinta Sugimoto 1196283bc9f3SFan Du /* net->xfrm.xfrm_state_lock is held */ 1197283bc9f3SFan Du struct xfrm_state *xfrm_migrate_state_find(struct xfrm_migrate *m, struct net *net) 119880c9abaaSShinta Sugimoto { 119980c9abaaSShinta Sugimoto unsigned int h; 120080c9abaaSShinta Sugimoto struct xfrm_state *x; 120180c9abaaSShinta Sugimoto 120280c9abaaSShinta Sugimoto if (m->reqid) { 1203283bc9f3SFan Du h = xfrm_dst_hash(net, &m->old_daddr, &m->old_saddr, 120480c9abaaSShinta Sugimoto m->reqid, m->old_family); 1205283bc9f3SFan Du hlist_for_each_entry(x, net->xfrm.state_bydst+h, bydst) { 120680c9abaaSShinta Sugimoto if (x->props.mode != m->mode || 120780c9abaaSShinta Sugimoto x->id.proto != m->proto) 120880c9abaaSShinta Sugimoto continue; 120980c9abaaSShinta Sugimoto if (m->reqid && x->props.reqid != m->reqid) 121080c9abaaSShinta Sugimoto continue; 121170e94e66SYOSHIFUJI Hideaki / 吉藤英明 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, 121280c9abaaSShinta Sugimoto m->old_family) || 121370e94e66SYOSHIFUJI Hideaki / 吉藤英明 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, 121480c9abaaSShinta Sugimoto m->old_family)) 121580c9abaaSShinta Sugimoto continue; 121680c9abaaSShinta Sugimoto xfrm_state_hold(x); 121780c9abaaSShinta Sugimoto return x; 121880c9abaaSShinta Sugimoto } 121980c9abaaSShinta Sugimoto } else { 1220283bc9f3SFan Du h = xfrm_src_hash(net, &m->old_daddr, &m->old_saddr, 122180c9abaaSShinta Sugimoto m->old_family); 1222283bc9f3SFan Du hlist_for_each_entry(x, net->xfrm.state_bysrc+h, bysrc) { 122380c9abaaSShinta Sugimoto if (x->props.mode != m->mode || 122480c9abaaSShinta Sugimoto x->id.proto != m->proto) 122580c9abaaSShinta Sugimoto continue; 122670e94e66SYOSHIFUJI Hideaki / 吉藤英明 if (!xfrm_addr_equal(&x->id.daddr, &m->old_daddr, 122780c9abaaSShinta Sugimoto m->old_family) || 122870e94e66SYOSHIFUJI Hideaki / 吉藤英明 !xfrm_addr_equal(&x->props.saddr, &m->old_saddr, 122980c9abaaSShinta Sugimoto m->old_family)) 123080c9abaaSShinta Sugimoto continue; 123180c9abaaSShinta Sugimoto xfrm_state_hold(x); 123280c9abaaSShinta Sugimoto return x; 123380c9abaaSShinta Sugimoto } 123480c9abaaSShinta Sugimoto } 123580c9abaaSShinta Sugimoto 123680c9abaaSShinta Sugimoto return NULL; 123780c9abaaSShinta Sugimoto } 123880c9abaaSShinta Sugimoto EXPORT_SYMBOL(xfrm_migrate_state_find); 123980c9abaaSShinta Sugimoto 124080c9abaaSShinta Sugimoto struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 124180c9abaaSShinta Sugimoto struct xfrm_migrate *m) 124280c9abaaSShinta Sugimoto { 124380c9abaaSShinta Sugimoto struct xfrm_state *xc; 124480c9abaaSShinta Sugimoto int err; 124580c9abaaSShinta Sugimoto 124680c9abaaSShinta Sugimoto xc = xfrm_state_clone(x, &err); 124780c9abaaSShinta Sugimoto if (!xc) 124880c9abaaSShinta Sugimoto return NULL; 124980c9abaaSShinta Sugimoto 125080c9abaaSShinta Sugimoto memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); 125180c9abaaSShinta Sugimoto memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); 125280c9abaaSShinta Sugimoto 125380c9abaaSShinta Sugimoto /* add state */ 125470e94e66SYOSHIFUJI Hideaki / 吉藤英明 if (xfrm_addr_equal(&x->id.daddr, &m->new_daddr, m->new_family)) { 125580c9abaaSShinta Sugimoto /* a care is needed when the destination address of the 125680c9abaaSShinta Sugimoto state is to be updated as it is a part of triplet */ 125780c9abaaSShinta Sugimoto xfrm_state_insert(xc); 125880c9abaaSShinta Sugimoto } else { 125980c9abaaSShinta Sugimoto if ((err = xfrm_state_add(xc)) < 0) 126080c9abaaSShinta Sugimoto goto error; 126180c9abaaSShinta Sugimoto } 126280c9abaaSShinta Sugimoto 126380c9abaaSShinta Sugimoto return xc; 126480c9abaaSShinta Sugimoto error: 126578347c8cSThomas Egerer xfrm_state_put(xc); 126680c9abaaSShinta Sugimoto return NULL; 126780c9abaaSShinta Sugimoto } 126880c9abaaSShinta Sugimoto EXPORT_SYMBOL(xfrm_state_migrate); 126980c9abaaSShinta Sugimoto #endif 127080c9abaaSShinta Sugimoto 12711da177e4SLinus Torvalds int xfrm_state_update(struct xfrm_state *x) 12721da177e4SLinus Torvalds { 127337b08e34SDavid S. Miller struct xfrm_state *x1, *to_put; 12741da177e4SLinus Torvalds int err; 1275eb2971b6SMasahide NAKAMURA int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); 1276283bc9f3SFan Du struct net *net = xs_net(x); 12771da177e4SLinus Torvalds 127837b08e34SDavid S. Miller to_put = NULL; 127937b08e34SDavid S. Miller 1280283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 1281edcd5821SDavid S. Miller x1 = __xfrm_state_locate(x, use_spi, x->props.family); 12821da177e4SLinus Torvalds 12831da177e4SLinus Torvalds err = -ESRCH; 12841da177e4SLinus Torvalds if (!x1) 12851da177e4SLinus Torvalds goto out; 12861da177e4SLinus Torvalds 12871da177e4SLinus Torvalds if (xfrm_state_kern(x1)) { 128837b08e34SDavid S. Miller to_put = x1; 12891da177e4SLinus Torvalds err = -EEXIST; 12901da177e4SLinus Torvalds goto out; 12911da177e4SLinus Torvalds } 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds if (x1->km.state == XFRM_STATE_ACQ) { 12941da177e4SLinus Torvalds __xfrm_state_insert(x); 12951da177e4SLinus Torvalds x = NULL; 12961da177e4SLinus Torvalds } 12971da177e4SLinus Torvalds err = 0; 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvalds out: 1300283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 13011da177e4SLinus Torvalds 130237b08e34SDavid S. Miller if (to_put) 130337b08e34SDavid S. Miller xfrm_state_put(to_put); 130437b08e34SDavid S. Miller 13051da177e4SLinus Torvalds if (err) 13061da177e4SLinus Torvalds return err; 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds if (!x) { 13091da177e4SLinus Torvalds xfrm_state_delete(x1); 13101da177e4SLinus Torvalds xfrm_state_put(x1); 13111da177e4SLinus Torvalds return 0; 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds err = -EINVAL; 13151da177e4SLinus Torvalds spin_lock_bh(&x1->lock); 13161da177e4SLinus Torvalds if (likely(x1->km.state == XFRM_STATE_VALID)) { 13171da177e4SLinus Torvalds if (x->encap && x1->encap) 13181da177e4SLinus Torvalds memcpy(x1->encap, x->encap, sizeof(*x1->encap)); 1319060f02a3SNoriaki TAKAMIYA if (x->coaddr && x1->coaddr) { 1320060f02a3SNoriaki TAKAMIYA memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); 1321060f02a3SNoriaki TAKAMIYA } 1322060f02a3SNoriaki TAKAMIYA if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) 1323060f02a3SNoriaki TAKAMIYA memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); 13241da177e4SLinus Torvalds memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); 13251da177e4SLinus Torvalds x1->km.dying = 0; 13261da177e4SLinus Torvalds 13279e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); 13281da177e4SLinus Torvalds if (x1->curlft.use_time) 13291da177e4SLinus Torvalds xfrm_state_check_expire(x1); 13301da177e4SLinus Torvalds 13311da177e4SLinus Torvalds err = 0; 13328fcbc637STushar Gohad x->km.state = XFRM_STATE_DEAD; 13338fcbc637STushar Gohad __xfrm_state_put(x); 13341da177e4SLinus Torvalds } 13351da177e4SLinus Torvalds spin_unlock_bh(&x1->lock); 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds xfrm_state_put(x1); 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds return err; 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_update); 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds int xfrm_state_check_expire(struct xfrm_state *x) 13441da177e4SLinus Torvalds { 13451da177e4SLinus Torvalds if (!x->curlft.use_time) 13469d729f72SJames Morris x->curlft.use_time = get_seconds(); 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds if (x->curlft.bytes >= x->lft.hard_byte_limit || 13491da177e4SLinus Torvalds x->curlft.packets >= x->lft.hard_packet_limit) { 13504666faabSHerbert Xu x->km.state = XFRM_STATE_EXPIRED; 13519e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL); 13521da177e4SLinus Torvalds return -EINVAL; 13531da177e4SLinus Torvalds } 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds if (!x->km.dying && 13561da177e4SLinus Torvalds (x->curlft.bytes >= x->lft.soft_byte_limit || 13574666faabSHerbert Xu x->curlft.packets >= x->lft.soft_packet_limit)) { 13584666faabSHerbert Xu x->km.dying = 1; 135953bc6b4dSJamal Hadi Salim km_state_expired(x, 0, 0); 13604666faabSHerbert Xu } 13611da177e4SLinus Torvalds return 0; 13621da177e4SLinus Torvalds } 13631da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_check_expire); 13641da177e4SLinus Torvalds 13651da177e4SLinus Torvalds struct xfrm_state * 1366a70486f0SDavid S. Miller xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, 1367bd55775cSJamal Hadi Salim u8 proto, unsigned short family) 13681da177e4SLinus Torvalds { 13691da177e4SLinus Torvalds struct xfrm_state *x; 13701da177e4SLinus Torvalds 1371283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 1372bd55775cSJamal Hadi Salim x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); 1373283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 13741da177e4SLinus Torvalds return x; 13751da177e4SLinus Torvalds } 13761da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_lookup); 13771da177e4SLinus Torvalds 13781da177e4SLinus Torvalds struct xfrm_state * 1379bd55775cSJamal Hadi Salim xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1380a70486f0SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 1381eb2971b6SMasahide NAKAMURA u8 proto, unsigned short family) 1382eb2971b6SMasahide NAKAMURA { 1383eb2971b6SMasahide NAKAMURA struct xfrm_state *x; 1384eb2971b6SMasahide NAKAMURA 1385283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 1386bd55775cSJamal Hadi Salim x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); 1387283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 1388eb2971b6SMasahide NAKAMURA return x; 1389eb2971b6SMasahide NAKAMURA } 1390eb2971b6SMasahide NAKAMURA EXPORT_SYMBOL(xfrm_state_lookup_byaddr); 1391eb2971b6SMasahide NAKAMURA 1392eb2971b6SMasahide NAKAMURA struct xfrm_state * 1393e473fcb4SMathias Krause xfrm_find_acq(struct net *net, const struct xfrm_mark *mark, u8 mode, u32 reqid, 1394e473fcb4SMathias Krause u8 proto, const xfrm_address_t *daddr, 1395e473fcb4SMathias Krause const xfrm_address_t *saddr, int create, unsigned short family) 13961da177e4SLinus Torvalds { 13971da177e4SLinus Torvalds struct xfrm_state *x; 13981da177e4SLinus Torvalds 1399283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 1400bd55775cSJamal Hadi Salim x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); 1401283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 14022770834cSDavid S. Miller 14031da177e4SLinus Torvalds return x; 14041da177e4SLinus Torvalds } 14051da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_find_acq); 14061da177e4SLinus Torvalds 140741a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 140841a49cc3SMasahide NAKAMURA int 140941a49cc3SMasahide NAKAMURA xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, 1410283bc9f3SFan Du unsigned short family, struct net *net) 141141a49cc3SMasahide NAKAMURA { 141241a49cc3SMasahide NAKAMURA int err = 0; 141341a49cc3SMasahide NAKAMURA struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); 141441a49cc3SMasahide NAKAMURA if (!afinfo) 141541a49cc3SMasahide NAKAMURA return -EAFNOSUPPORT; 141641a49cc3SMasahide NAKAMURA 1417283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); /*FIXME*/ 141841a49cc3SMasahide NAKAMURA if (afinfo->tmpl_sort) 141941a49cc3SMasahide NAKAMURA err = afinfo->tmpl_sort(dst, src, n); 1420283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 142141a49cc3SMasahide NAKAMURA xfrm_state_put_afinfo(afinfo); 142241a49cc3SMasahide NAKAMURA return err; 142341a49cc3SMasahide NAKAMURA } 142441a49cc3SMasahide NAKAMURA EXPORT_SYMBOL(xfrm_tmpl_sort); 142541a49cc3SMasahide NAKAMURA 142641a49cc3SMasahide NAKAMURA int 142741a49cc3SMasahide NAKAMURA xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, 142841a49cc3SMasahide NAKAMURA unsigned short family) 142941a49cc3SMasahide NAKAMURA { 143041a49cc3SMasahide NAKAMURA int err = 0; 143141a49cc3SMasahide NAKAMURA struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); 1432283bc9f3SFan Du struct net *net = xs_net(*dst); 1433283bc9f3SFan Du 143441a49cc3SMasahide NAKAMURA if (!afinfo) 143541a49cc3SMasahide NAKAMURA return -EAFNOSUPPORT; 143641a49cc3SMasahide NAKAMURA 1437283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 143841a49cc3SMasahide NAKAMURA if (afinfo->state_sort) 143941a49cc3SMasahide NAKAMURA err = afinfo->state_sort(dst, src, n); 1440283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 144141a49cc3SMasahide NAKAMURA xfrm_state_put_afinfo(afinfo); 144241a49cc3SMasahide NAKAMURA return err; 144341a49cc3SMasahide NAKAMURA } 144441a49cc3SMasahide NAKAMURA EXPORT_SYMBOL(xfrm_state_sort); 144541a49cc3SMasahide NAKAMURA #endif 144641a49cc3SMasahide NAKAMURA 14471da177e4SLinus Torvalds /* Silly enough, but I'm lazy to build resolution list */ 14481da177e4SLinus Torvalds 1449bd55775cSJamal Hadi Salim static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) 14501da177e4SLinus Torvalds { 14511da177e4SLinus Torvalds int i; 14521da177e4SLinus Torvalds 14535447c5e4SAlexey Dobriyan for (i = 0; i <= net->xfrm.state_hmask; i++) { 14548f126e37SDavid S. Miller struct xfrm_state *x; 14558f126e37SDavid S. Miller 1456b67bfe0dSSasha Levin hlist_for_each_entry(x, net->xfrm.state_bydst+i, bydst) { 14578f126e37SDavid S. Miller if (x->km.seq == seq && 14583d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 14598f126e37SDavid S. Miller x->km.state == XFRM_STATE_ACQ) { 14601da177e4SLinus Torvalds xfrm_state_hold(x); 14611da177e4SLinus Torvalds return x; 14621da177e4SLinus Torvalds } 14631da177e4SLinus Torvalds } 14641da177e4SLinus Torvalds } 14651da177e4SLinus Torvalds return NULL; 14661da177e4SLinus Torvalds } 14671da177e4SLinus Torvalds 1468bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) 14691da177e4SLinus Torvalds { 14701da177e4SLinus Torvalds struct xfrm_state *x; 14711da177e4SLinus Torvalds 1472283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 1473bd55775cSJamal Hadi Salim x = __xfrm_find_acq_byseq(net, mark, seq); 1474283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 14751da177e4SLinus Torvalds return x; 14761da177e4SLinus Torvalds } 14771da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_find_acq_byseq); 14781da177e4SLinus Torvalds 14791da177e4SLinus Torvalds u32 xfrm_get_acqseq(void) 14801da177e4SLinus Torvalds { 14811da177e4SLinus Torvalds u32 res; 14826836b9bdSjamal static atomic_t acqseq; 14831da177e4SLinus Torvalds 14846836b9bdSjamal do { 14856836b9bdSjamal res = atomic_inc_return(&acqseq); 14866836b9bdSjamal } while (!res); 14876836b9bdSjamal 14881da177e4SLinus Torvalds return res; 14891da177e4SLinus Torvalds } 14901da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_get_acqseq); 14911da177e4SLinus Torvalds 1492776e9dd9SFan Du int verify_spi_info(u8 proto, u32 min, u32 max) 1493776e9dd9SFan Du { 1494776e9dd9SFan Du switch (proto) { 1495776e9dd9SFan Du case IPPROTO_AH: 1496776e9dd9SFan Du case IPPROTO_ESP: 1497776e9dd9SFan Du break; 1498776e9dd9SFan Du 1499776e9dd9SFan Du case IPPROTO_COMP: 1500776e9dd9SFan Du /* IPCOMP spi is 16-bits. */ 1501776e9dd9SFan Du if (max >= 0x10000) 1502776e9dd9SFan Du return -EINVAL; 1503776e9dd9SFan Du break; 1504776e9dd9SFan Du 1505776e9dd9SFan Du default: 1506776e9dd9SFan Du return -EINVAL; 1507776e9dd9SFan Du } 1508776e9dd9SFan Du 1509776e9dd9SFan Du if (min > max) 1510776e9dd9SFan Du return -EINVAL; 1511776e9dd9SFan Du 1512776e9dd9SFan Du return 0; 1513776e9dd9SFan Du } 1514776e9dd9SFan Du EXPORT_SYMBOL(verify_spi_info); 1515776e9dd9SFan Du 1516658b219eSHerbert Xu int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) 15171da177e4SLinus Torvalds { 1518221df1edSAlexey Dobriyan struct net *net = xs_net(x); 1519f034b5d4SDavid S. Miller unsigned int h; 15201da177e4SLinus Torvalds struct xfrm_state *x0; 1521658b219eSHerbert Xu int err = -ENOENT; 1522658b219eSHerbert Xu __be32 minspi = htonl(low); 1523658b219eSHerbert Xu __be32 maxspi = htonl(high); 1524bd55775cSJamal Hadi Salim u32 mark = x->mark.v & x->mark.m; 15251da177e4SLinus Torvalds 1526658b219eSHerbert Xu spin_lock_bh(&x->lock); 1527658b219eSHerbert Xu if (x->km.state == XFRM_STATE_DEAD) 1528658b219eSHerbert Xu goto unlock; 1529658b219eSHerbert Xu 1530658b219eSHerbert Xu err = 0; 15311da177e4SLinus Torvalds if (x->id.spi) 1532658b219eSHerbert Xu goto unlock; 1533658b219eSHerbert Xu 1534658b219eSHerbert Xu err = -ENOENT; 15351da177e4SLinus Torvalds 15361da177e4SLinus Torvalds if (minspi == maxspi) { 1537bd55775cSJamal Hadi Salim x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); 15381da177e4SLinus Torvalds if (x0) { 15391da177e4SLinus Torvalds xfrm_state_put(x0); 1540658b219eSHerbert Xu goto unlock; 15411da177e4SLinus Torvalds } 15421da177e4SLinus Torvalds x->id.spi = minspi; 15431da177e4SLinus Torvalds } else { 15441da177e4SLinus Torvalds u32 spi = 0; 154526977b4eSAl Viro for (h=0; h<high-low+1; h++) { 154626977b4eSAl Viro spi = low + net_random()%(high-low+1); 1547bd55775cSJamal Hadi Salim x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); 15481da177e4SLinus Torvalds if (x0 == NULL) { 15491da177e4SLinus Torvalds x->id.spi = htonl(spi); 15501da177e4SLinus Torvalds break; 15511da177e4SLinus Torvalds } 15521da177e4SLinus Torvalds xfrm_state_put(x0); 15531da177e4SLinus Torvalds } 15541da177e4SLinus Torvalds } 15551da177e4SLinus Torvalds if (x->id.spi) { 1556283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 155712604d8aSAlexey Dobriyan h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); 155812604d8aSAlexey Dobriyan hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); 1559283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 1560658b219eSHerbert Xu 1561658b219eSHerbert Xu err = 0; 15621da177e4SLinus Torvalds } 1563658b219eSHerbert Xu 1564658b219eSHerbert Xu unlock: 1565658b219eSHerbert Xu spin_unlock_bh(&x->lock); 1566658b219eSHerbert Xu 1567658b219eSHerbert Xu return err; 15681da177e4SLinus Torvalds } 15691da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_alloc_spi); 15701da177e4SLinus Torvalds 1571284fa7daSAlexey Dobriyan int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 15724c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), 15731da177e4SLinus Torvalds void *data) 15741da177e4SLinus Torvalds { 157512a169e7SHerbert Xu struct xfrm_state *state; 157612a169e7SHerbert Xu struct xfrm_state_walk *x; 15771da177e4SLinus Torvalds int err = 0; 15781da177e4SLinus Torvalds 157912a169e7SHerbert Xu if (walk->seq != 0 && list_empty(&walk->all)) 15804c563f76STimo Teras return 0; 15814c563f76STimo Teras 1582283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 158312a169e7SHerbert Xu if (list_empty(&walk->all)) 1584284fa7daSAlexey Dobriyan x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); 158512a169e7SHerbert Xu else 158612a169e7SHerbert Xu x = list_entry(&walk->all, struct xfrm_state_walk, all); 1587284fa7daSAlexey Dobriyan list_for_each_entry_from(x, &net->xfrm.state_all, all) { 158812a169e7SHerbert Xu if (x->state == XFRM_STATE_DEAD) 15894c563f76STimo Teras continue; 159012a169e7SHerbert Xu state = container_of(x, struct xfrm_state, km); 159112a169e7SHerbert Xu if (!xfrm_id_proto_match(state->id.proto, walk->proto)) 159294b9bb54SJamal Hadi Salim continue; 159312a169e7SHerbert Xu err = func(state, walk->seq, data); 15944c563f76STimo Teras if (err) { 159512a169e7SHerbert Xu list_move_tail(&walk->all, &x->all); 159694b9bb54SJamal Hadi Salim goto out; 159794b9bb54SJamal Hadi Salim } 159812a169e7SHerbert Xu walk->seq++; 15994c563f76STimo Teras } 160012a169e7SHerbert Xu if (walk->seq == 0) { 16011da177e4SLinus Torvalds err = -ENOENT; 16021da177e4SLinus Torvalds goto out; 16031da177e4SLinus Torvalds } 160412a169e7SHerbert Xu list_del_init(&walk->all); 16051da177e4SLinus Torvalds out: 1606283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 16071da177e4SLinus Torvalds return err; 16081da177e4SLinus Torvalds } 16091da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_walk); 16101da177e4SLinus Torvalds 16115c182458SHerbert Xu void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto) 16125c182458SHerbert Xu { 161312a169e7SHerbert Xu INIT_LIST_HEAD(&walk->all); 16145c182458SHerbert Xu walk->proto = proto; 161512a169e7SHerbert Xu walk->state = XFRM_STATE_DEAD; 161612a169e7SHerbert Xu walk->seq = 0; 16175c182458SHerbert Xu } 16185c182458SHerbert Xu EXPORT_SYMBOL(xfrm_state_walk_init); 16195c182458SHerbert Xu 1620283bc9f3SFan Du void xfrm_state_walk_done(struct xfrm_state_walk *walk, struct net *net) 1621abb81c4fSHerbert Xu { 162212a169e7SHerbert Xu if (list_empty(&walk->all)) 16235c182458SHerbert Xu return; 16245c182458SHerbert Xu 1625283bc9f3SFan Du spin_lock_bh(&net->xfrm.xfrm_state_lock); 162612a169e7SHerbert Xu list_del(&walk->all); 1627283bc9f3SFan Du spin_unlock_bh(&net->xfrm.xfrm_state_lock); 1628abb81c4fSHerbert Xu } 1629abb81c4fSHerbert Xu EXPORT_SYMBOL(xfrm_state_walk_done); 1630abb81c4fSHerbert Xu 1631f8cd5488SJamal Hadi Salim static void xfrm_replay_timer_handler(unsigned long data) 1632f8cd5488SJamal Hadi Salim { 1633f8cd5488SJamal Hadi Salim struct xfrm_state *x = (struct xfrm_state*)data; 1634f8cd5488SJamal Hadi Salim 1635f8cd5488SJamal Hadi Salim spin_lock(&x->lock); 1636f8cd5488SJamal Hadi Salim 16372717096aSJamal Hadi Salim if (x->km.state == XFRM_STATE_VALID) { 1638a6483b79SAlexey Dobriyan if (xfrm_aevent_is_on(xs_net(x))) 16399fdc4883SSteffen Klassert x->repl->notify(x, XFRM_REPLAY_TIMEOUT); 16402717096aSJamal Hadi Salim else 16412717096aSJamal Hadi Salim x->xflags |= XFRM_TIME_DEFER; 16422717096aSJamal Hadi Salim } 1643f8cd5488SJamal Hadi Salim 1644f8cd5488SJamal Hadi Salim spin_unlock(&x->lock); 1645f8cd5488SJamal Hadi Salim } 1646f8cd5488SJamal Hadi Salim 1647df01812eSDenis Cheng static LIST_HEAD(xfrm_km_list); 16481da177e4SLinus Torvalds 1649214e005bSDavid S. Miller void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 16501da177e4SLinus Torvalds { 16511da177e4SLinus Torvalds struct xfrm_mgr *km; 16521da177e4SLinus Torvalds 165385168c00SCong Wang rcu_read_lock(); 165485168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) 165526b15dadSJamal Hadi Salim if (km->notify_policy) 165626b15dadSJamal Hadi Salim km->notify_policy(xp, dir, c); 165785168c00SCong Wang rcu_read_unlock(); 165826b15dadSJamal Hadi Salim } 165926b15dadSJamal Hadi Salim 1660214e005bSDavid S. Miller void km_state_notify(struct xfrm_state *x, const struct km_event *c) 166126b15dadSJamal Hadi Salim { 166226b15dadSJamal Hadi Salim struct xfrm_mgr *km; 166385168c00SCong Wang rcu_read_lock(); 166485168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) 166526b15dadSJamal Hadi Salim if (km->notify) 166626b15dadSJamal Hadi Salim km->notify(x, c); 166785168c00SCong Wang rcu_read_unlock(); 166826b15dadSJamal Hadi Salim } 166926b15dadSJamal Hadi Salim 167026b15dadSJamal Hadi Salim EXPORT_SYMBOL(km_policy_notify); 167126b15dadSJamal Hadi Salim EXPORT_SYMBOL(km_state_notify); 167226b15dadSJamal Hadi Salim 167315e47304SEric W. Biederman void km_state_expired(struct xfrm_state *x, int hard, u32 portid) 167426b15dadSJamal Hadi Salim { 167526b15dadSJamal Hadi Salim struct km_event c; 167626b15dadSJamal Hadi Salim 1677bf08867fSHerbert Xu c.data.hard = hard; 167815e47304SEric W. Biederman c.portid = portid; 1679f60f6b8fSHerbert Xu c.event = XFRM_MSG_EXPIRE; 168026b15dadSJamal Hadi Salim km_state_notify(x, &c); 16811da177e4SLinus Torvalds } 16821da177e4SLinus Torvalds 168353bc6b4dSJamal Hadi Salim EXPORT_SYMBOL(km_state_expired); 168426b15dadSJamal Hadi Salim /* 168526b15dadSJamal Hadi Salim * We send to all registered managers regardless of failure 168626b15dadSJamal Hadi Salim * We are happy with one success 168726b15dadSJamal Hadi Salim */ 1688980ebd25SJamal Hadi Salim int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) 16891da177e4SLinus Torvalds { 169026b15dadSJamal Hadi Salim int err = -EINVAL, acqret; 16911da177e4SLinus Torvalds struct xfrm_mgr *km; 16921da177e4SLinus Torvalds 169385168c00SCong Wang rcu_read_lock(); 169485168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 169565e0736bSFan Du acqret = km->acquire(x, t, pol); 169626b15dadSJamal Hadi Salim if (!acqret) 169726b15dadSJamal Hadi Salim err = acqret; 16981da177e4SLinus Torvalds } 169985168c00SCong Wang rcu_read_unlock(); 17001da177e4SLinus Torvalds return err; 17011da177e4SLinus Torvalds } 1702980ebd25SJamal Hadi Salim EXPORT_SYMBOL(km_query); 17031da177e4SLinus Torvalds 17045d36b180SAl Viro int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) 17051da177e4SLinus Torvalds { 17061da177e4SLinus Torvalds int err = -EINVAL; 17071da177e4SLinus Torvalds struct xfrm_mgr *km; 17081da177e4SLinus Torvalds 170985168c00SCong Wang rcu_read_lock(); 171085168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 17111da177e4SLinus Torvalds if (km->new_mapping) 17121da177e4SLinus Torvalds err = km->new_mapping(x, ipaddr, sport); 17131da177e4SLinus Torvalds if (!err) 17141da177e4SLinus Torvalds break; 17151da177e4SLinus Torvalds } 171685168c00SCong Wang rcu_read_unlock(); 17171da177e4SLinus Torvalds return err; 17181da177e4SLinus Torvalds } 17191da177e4SLinus Torvalds EXPORT_SYMBOL(km_new_mapping); 17201da177e4SLinus Torvalds 172115e47304SEric W. Biederman void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) 17221da177e4SLinus Torvalds { 172326b15dadSJamal Hadi Salim struct km_event c; 17241da177e4SLinus Torvalds 1725bf08867fSHerbert Xu c.data.hard = hard; 172615e47304SEric W. Biederman c.portid = portid; 1727f60f6b8fSHerbert Xu c.event = XFRM_MSG_POLEXPIRE; 172826b15dadSJamal Hadi Salim km_policy_notify(pol, dir, &c); 17291da177e4SLinus Torvalds } 1730a70fcb0bSDavid S. Miller EXPORT_SYMBOL(km_policy_expired); 17311da177e4SLinus Torvalds 17322d60abc2SEric Dumazet #ifdef CONFIG_XFRM_MIGRATE 1733183cad12SDavid S. Miller int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1734183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 1735183cad12SDavid S. Miller const struct xfrm_kmaddress *k) 173680c9abaaSShinta Sugimoto { 173780c9abaaSShinta Sugimoto int err = -EINVAL; 173880c9abaaSShinta Sugimoto int ret; 173980c9abaaSShinta Sugimoto struct xfrm_mgr *km; 174080c9abaaSShinta Sugimoto 174185168c00SCong Wang rcu_read_lock(); 174285168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 174380c9abaaSShinta Sugimoto if (km->migrate) { 174413c1d189SArnaud Ebalard ret = km->migrate(sel, dir, type, m, num_migrate, k); 174580c9abaaSShinta Sugimoto if (!ret) 174680c9abaaSShinta Sugimoto err = ret; 174780c9abaaSShinta Sugimoto } 174880c9abaaSShinta Sugimoto } 174985168c00SCong Wang rcu_read_unlock(); 175080c9abaaSShinta Sugimoto return err; 175180c9abaaSShinta Sugimoto } 175280c9abaaSShinta Sugimoto EXPORT_SYMBOL(km_migrate); 17532d60abc2SEric Dumazet #endif 175480c9abaaSShinta Sugimoto 1755db983c11SAlexey Dobriyan int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) 175697a64b45SMasahide NAKAMURA { 175797a64b45SMasahide NAKAMURA int err = -EINVAL; 175897a64b45SMasahide NAKAMURA int ret; 175997a64b45SMasahide NAKAMURA struct xfrm_mgr *km; 176097a64b45SMasahide NAKAMURA 176185168c00SCong Wang rcu_read_lock(); 176285168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 176397a64b45SMasahide NAKAMURA if (km->report) { 1764db983c11SAlexey Dobriyan ret = km->report(net, proto, sel, addr); 176597a64b45SMasahide NAKAMURA if (!ret) 176697a64b45SMasahide NAKAMURA err = ret; 176797a64b45SMasahide NAKAMURA } 176897a64b45SMasahide NAKAMURA } 176985168c00SCong Wang rcu_read_unlock(); 177097a64b45SMasahide NAKAMURA return err; 177197a64b45SMasahide NAKAMURA } 177297a64b45SMasahide NAKAMURA EXPORT_SYMBOL(km_report); 177397a64b45SMasahide NAKAMURA 17741da177e4SLinus Torvalds int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 17751da177e4SLinus Torvalds { 17761da177e4SLinus Torvalds int err; 17771da177e4SLinus Torvalds u8 *data; 17781da177e4SLinus Torvalds struct xfrm_mgr *km; 17791da177e4SLinus Torvalds struct xfrm_policy *pol = NULL; 17801da177e4SLinus Torvalds 17811da177e4SLinus Torvalds if (optlen <= 0 || optlen > PAGE_SIZE) 17821da177e4SLinus Torvalds return -EMSGSIZE; 17831da177e4SLinus Torvalds 17841da177e4SLinus Torvalds data = kmalloc(optlen, GFP_KERNEL); 17851da177e4SLinus Torvalds if (!data) 17861da177e4SLinus Torvalds return -ENOMEM; 17871da177e4SLinus Torvalds 17881da177e4SLinus Torvalds err = -EFAULT; 17891da177e4SLinus Torvalds if (copy_from_user(data, optval, optlen)) 17901da177e4SLinus Torvalds goto out; 17911da177e4SLinus Torvalds 17921da177e4SLinus Torvalds err = -EINVAL; 179385168c00SCong Wang rcu_read_lock(); 179485168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 1795cb969f07SVenkat Yekkirala pol = km->compile_policy(sk, optname, data, 17961da177e4SLinus Torvalds optlen, &err); 17971da177e4SLinus Torvalds if (err >= 0) 17981da177e4SLinus Torvalds break; 17991da177e4SLinus Torvalds } 180085168c00SCong Wang rcu_read_unlock(); 18011da177e4SLinus Torvalds 18021da177e4SLinus Torvalds if (err >= 0) { 18031da177e4SLinus Torvalds xfrm_sk_policy_insert(sk, err, pol); 18041da177e4SLinus Torvalds xfrm_pol_put(pol); 18051da177e4SLinus Torvalds err = 0; 18061da177e4SLinus Torvalds } 18071da177e4SLinus Torvalds 18081da177e4SLinus Torvalds out: 18091da177e4SLinus Torvalds kfree(data); 18101da177e4SLinus Torvalds return err; 18111da177e4SLinus Torvalds } 18121da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_user_policy); 18131da177e4SLinus Torvalds 181485168c00SCong Wang static DEFINE_SPINLOCK(xfrm_km_lock); 181585168c00SCong Wang 18161da177e4SLinus Torvalds int xfrm_register_km(struct xfrm_mgr *km) 18171da177e4SLinus Torvalds { 181885168c00SCong Wang spin_lock_bh(&xfrm_km_lock); 181985168c00SCong Wang list_add_tail_rcu(&km->list, &xfrm_km_list); 182085168c00SCong Wang spin_unlock_bh(&xfrm_km_lock); 18211da177e4SLinus Torvalds return 0; 18221da177e4SLinus Torvalds } 18231da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_register_km); 18241da177e4SLinus Torvalds 18251da177e4SLinus Torvalds int xfrm_unregister_km(struct xfrm_mgr *km) 18261da177e4SLinus Torvalds { 182785168c00SCong Wang spin_lock_bh(&xfrm_km_lock); 182885168c00SCong Wang list_del_rcu(&km->list); 182985168c00SCong Wang spin_unlock_bh(&xfrm_km_lock); 183085168c00SCong Wang synchronize_rcu(); 18311da177e4SLinus Torvalds return 0; 18321da177e4SLinus Torvalds } 18331da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_unregister_km); 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) 18361da177e4SLinus Torvalds { 18371da177e4SLinus Torvalds int err = 0; 18381da177e4SLinus Torvalds if (unlikely(afinfo == NULL)) 18391da177e4SLinus Torvalds return -EINVAL; 18401da177e4SLinus Torvalds if (unlikely(afinfo->family >= NPROTO)) 18411da177e4SLinus Torvalds return -EAFNOSUPPORT; 184244abdc30SCong Wang spin_lock_bh(&xfrm_state_afinfo_lock); 18431da177e4SLinus Torvalds if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) 18441da177e4SLinus Torvalds err = -ENOBUFS; 1845edcd5821SDavid S. Miller else 184644abdc30SCong Wang rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); 184744abdc30SCong Wang spin_unlock_bh(&xfrm_state_afinfo_lock); 18481da177e4SLinus Torvalds return err; 18491da177e4SLinus Torvalds } 18501da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_register_afinfo); 18511da177e4SLinus Torvalds 18521da177e4SLinus Torvalds int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) 18531da177e4SLinus Torvalds { 18541da177e4SLinus Torvalds int err = 0; 18551da177e4SLinus Torvalds if (unlikely(afinfo == NULL)) 18561da177e4SLinus Torvalds return -EINVAL; 18571da177e4SLinus Torvalds if (unlikely(afinfo->family >= NPROTO)) 18581da177e4SLinus Torvalds return -EAFNOSUPPORT; 185944abdc30SCong Wang spin_lock_bh(&xfrm_state_afinfo_lock); 18601da177e4SLinus Torvalds if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { 18611da177e4SLinus Torvalds if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) 18621da177e4SLinus Torvalds err = -EINVAL; 1863edcd5821SDavid S. Miller else 186444abdc30SCong Wang RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); 18651da177e4SLinus Torvalds } 186644abdc30SCong Wang spin_unlock_bh(&xfrm_state_afinfo_lock); 186744abdc30SCong Wang synchronize_rcu(); 18681da177e4SLinus Torvalds return err; 18691da177e4SLinus Torvalds } 18701da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_unregister_afinfo); 18711da177e4SLinus Torvalds 1872628e341fSHannes Frederic Sowa struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) 18731da177e4SLinus Torvalds { 18741da177e4SLinus Torvalds struct xfrm_state_afinfo *afinfo; 18751da177e4SLinus Torvalds if (unlikely(family >= NPROTO)) 18761da177e4SLinus Torvalds return NULL; 187744abdc30SCong Wang rcu_read_lock(); 187844abdc30SCong Wang afinfo = rcu_dereference(xfrm_state_afinfo[family]); 1879546be240SHerbert Xu if (unlikely(!afinfo)) 188044abdc30SCong Wang rcu_read_unlock(); 18811da177e4SLinus Torvalds return afinfo; 18821da177e4SLinus Torvalds } 18831da177e4SLinus Torvalds 1884628e341fSHannes Frederic Sowa void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) 18851da177e4SLinus Torvalds { 188644abdc30SCong Wang rcu_read_unlock(); 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds 18891da177e4SLinus Torvalds /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ 18901da177e4SLinus Torvalds void xfrm_state_delete_tunnel(struct xfrm_state *x) 18911da177e4SLinus Torvalds { 18921da177e4SLinus Torvalds if (x->tunnel) { 18931da177e4SLinus Torvalds struct xfrm_state *t = x->tunnel; 18941da177e4SLinus Torvalds 18951da177e4SLinus Torvalds if (atomic_read(&t->tunnel_users) == 2) 18961da177e4SLinus Torvalds xfrm_state_delete(t); 18971da177e4SLinus Torvalds atomic_dec(&t->tunnel_users); 18981da177e4SLinus Torvalds xfrm_state_put(t); 18991da177e4SLinus Torvalds x->tunnel = NULL; 19001da177e4SLinus Torvalds } 19011da177e4SLinus Torvalds } 19021da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_delete_tunnel); 19031da177e4SLinus Torvalds 19041da177e4SLinus Torvalds int xfrm_state_mtu(struct xfrm_state *x, int mtu) 19051da177e4SLinus Torvalds { 1906c5c25238SPatrick McHardy int res; 19071da177e4SLinus Torvalds 19081da177e4SLinus Torvalds spin_lock_bh(&x->lock); 19091da177e4SLinus Torvalds if (x->km.state == XFRM_STATE_VALID && 1910c5c25238SPatrick McHardy x->type && x->type->get_mtu) 1911c5c25238SPatrick McHardy res = x->type->get_mtu(x, mtu); 19121da177e4SLinus Torvalds else 191328121617SPatrick McHardy res = mtu - x->props.header_len; 19141da177e4SLinus Torvalds spin_unlock_bh(&x->lock); 19151da177e4SLinus Torvalds return res; 19161da177e4SLinus Torvalds } 19171da177e4SLinus Torvalds 1918a454f0ccSWei Yongjun int __xfrm_init_state(struct xfrm_state *x, bool init_replay) 191972cb6962SHerbert Xu { 1920d094cd83SHerbert Xu struct xfrm_state_afinfo *afinfo; 1921df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode; 1922d094cd83SHerbert Xu int family = x->props.family; 192372cb6962SHerbert Xu int err; 192472cb6962SHerbert Xu 1925d094cd83SHerbert Xu err = -EAFNOSUPPORT; 1926d094cd83SHerbert Xu afinfo = xfrm_state_get_afinfo(family); 1927d094cd83SHerbert Xu if (!afinfo) 1928d094cd83SHerbert Xu goto error; 1929d094cd83SHerbert Xu 1930d094cd83SHerbert Xu err = 0; 1931d094cd83SHerbert Xu if (afinfo->init_flags) 1932d094cd83SHerbert Xu err = afinfo->init_flags(x); 1933d094cd83SHerbert Xu 1934d094cd83SHerbert Xu xfrm_state_put_afinfo(afinfo); 1935d094cd83SHerbert Xu 1936d094cd83SHerbert Xu if (err) 1937d094cd83SHerbert Xu goto error; 1938d094cd83SHerbert Xu 1939d094cd83SHerbert Xu err = -EPROTONOSUPPORT; 1940df9dcb45SKazunori MIYAZAWA 1941df9dcb45SKazunori MIYAZAWA if (x->sel.family != AF_UNSPEC) { 1942df9dcb45SKazunori MIYAZAWA inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); 1943df9dcb45SKazunori MIYAZAWA if (inner_mode == NULL) 194413996378SHerbert Xu goto error; 194513996378SHerbert Xu 1946df9dcb45SKazunori MIYAZAWA if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && 1947df9dcb45SKazunori MIYAZAWA family != x->sel.family) { 1948df9dcb45SKazunori MIYAZAWA xfrm_put_mode(inner_mode); 194913996378SHerbert Xu goto error; 1950df9dcb45SKazunori MIYAZAWA } 1951df9dcb45SKazunori MIYAZAWA 1952df9dcb45SKazunori MIYAZAWA x->inner_mode = inner_mode; 1953df9dcb45SKazunori MIYAZAWA } else { 1954df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 1955d81d2285SMartin Willi int iafamily = AF_INET; 1956df9dcb45SKazunori MIYAZAWA 1957d81d2285SMartin Willi inner_mode = xfrm_get_mode(x->props.mode, x->props.family); 1958df9dcb45SKazunori MIYAZAWA if (inner_mode == NULL) 1959df9dcb45SKazunori MIYAZAWA goto error; 1960df9dcb45SKazunori MIYAZAWA 1961df9dcb45SKazunori MIYAZAWA if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { 1962df9dcb45SKazunori MIYAZAWA xfrm_put_mode(inner_mode); 1963df9dcb45SKazunori MIYAZAWA goto error; 1964df9dcb45SKazunori MIYAZAWA } 1965df9dcb45SKazunori MIYAZAWA x->inner_mode = inner_mode; 1966d81d2285SMartin Willi 1967d81d2285SMartin Willi if (x->props.family == AF_INET) 1968d81d2285SMartin Willi iafamily = AF_INET6; 1969d81d2285SMartin Willi 1970d81d2285SMartin Willi inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); 1971d81d2285SMartin Willi if (inner_mode_iaf) { 1972d81d2285SMartin Willi if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) 1973df9dcb45SKazunori MIYAZAWA x->inner_mode_iaf = inner_mode_iaf; 1974d81d2285SMartin Willi else 1975d81d2285SMartin Willi xfrm_put_mode(inner_mode_iaf); 1976df9dcb45SKazunori MIYAZAWA } 1977df9dcb45SKazunori MIYAZAWA } 197813996378SHerbert Xu 1979d094cd83SHerbert Xu x->type = xfrm_get_type(x->id.proto, family); 198072cb6962SHerbert Xu if (x->type == NULL) 198172cb6962SHerbert Xu goto error; 198272cb6962SHerbert Xu 198372cb6962SHerbert Xu err = x->type->init_state(x); 198472cb6962SHerbert Xu if (err) 198572cb6962SHerbert Xu goto error; 198672cb6962SHerbert Xu 198713996378SHerbert Xu x->outer_mode = xfrm_get_mode(x->props.mode, family); 1988599901c3SJulia Lawall if (x->outer_mode == NULL) { 1989599901c3SJulia Lawall err = -EPROTONOSUPPORT; 1990b59f45d0SHerbert Xu goto error; 1991599901c3SJulia Lawall } 1992b59f45d0SHerbert Xu 1993a454f0ccSWei Yongjun if (init_replay) { 1994a454f0ccSWei Yongjun err = xfrm_init_replay(x); 1995a454f0ccSWei Yongjun if (err) 1996a454f0ccSWei Yongjun goto error; 1997a454f0ccSWei Yongjun } 1998a454f0ccSWei Yongjun 199972cb6962SHerbert Xu x->km.state = XFRM_STATE_VALID; 200072cb6962SHerbert Xu 200172cb6962SHerbert Xu error: 200272cb6962SHerbert Xu return err; 200372cb6962SHerbert Xu } 200472cb6962SHerbert Xu 2005a454f0ccSWei Yongjun EXPORT_SYMBOL(__xfrm_init_state); 2006a454f0ccSWei Yongjun 2007a454f0ccSWei Yongjun int xfrm_init_state(struct xfrm_state *x) 2008a454f0ccSWei Yongjun { 2009a454f0ccSWei Yongjun return __xfrm_init_state(x, true); 2010a454f0ccSWei Yongjun } 2011a454f0ccSWei Yongjun 201272cb6962SHerbert Xu EXPORT_SYMBOL(xfrm_init_state); 20131da177e4SLinus Torvalds 2014d62ddc21SAlexey Dobriyan int __net_init xfrm_state_init(struct net *net) 20151da177e4SLinus Torvalds { 2016f034b5d4SDavid S. Miller unsigned int sz; 20171da177e4SLinus Torvalds 20189d4139c7SAlexey Dobriyan INIT_LIST_HEAD(&net->xfrm.state_all); 20199d4139c7SAlexey Dobriyan 2020f034b5d4SDavid S. Miller sz = sizeof(struct hlist_head) * 8; 2021f034b5d4SDavid S. Miller 202273d189dcSAlexey Dobriyan net->xfrm.state_bydst = xfrm_hash_alloc(sz); 202373d189dcSAlexey Dobriyan if (!net->xfrm.state_bydst) 202473d189dcSAlexey Dobriyan goto out_bydst; 2025d320bbb3SAlexey Dobriyan net->xfrm.state_bysrc = xfrm_hash_alloc(sz); 2026d320bbb3SAlexey Dobriyan if (!net->xfrm.state_bysrc) 2027d320bbb3SAlexey Dobriyan goto out_bysrc; 2028b754a4fdSAlexey Dobriyan net->xfrm.state_byspi = xfrm_hash_alloc(sz); 2029b754a4fdSAlexey Dobriyan if (!net->xfrm.state_byspi) 2030b754a4fdSAlexey Dobriyan goto out_byspi; 2031529983ecSAlexey Dobriyan net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); 2032f034b5d4SDavid S. Miller 20330bf7c5b0SAlexey Dobriyan net->xfrm.state_num = 0; 203463082733SAlexey Dobriyan INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); 2035b8a0ae20SAlexey Dobriyan INIT_HLIST_HEAD(&net->xfrm.state_gc_list); 2036c7837144SAlexey Dobriyan INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); 2037283bc9f3SFan Du spin_lock_init(&net->xfrm.xfrm_state_lock); 2038d62ddc21SAlexey Dobriyan return 0; 203973d189dcSAlexey Dobriyan 2040b754a4fdSAlexey Dobriyan out_byspi: 2041b754a4fdSAlexey Dobriyan xfrm_hash_free(net->xfrm.state_bysrc, sz); 2042d320bbb3SAlexey Dobriyan out_bysrc: 2043d320bbb3SAlexey Dobriyan xfrm_hash_free(net->xfrm.state_bydst, sz); 204473d189dcSAlexey Dobriyan out_bydst: 204573d189dcSAlexey Dobriyan return -ENOMEM; 2046d62ddc21SAlexey Dobriyan } 2047d62ddc21SAlexey Dobriyan 2048d62ddc21SAlexey Dobriyan void xfrm_state_fini(struct net *net) 2049d62ddc21SAlexey Dobriyan { 20507c2776eeSAlexey Dobriyan struct xfrm_audit audit_info; 205173d189dcSAlexey Dobriyan unsigned int sz; 205273d189dcSAlexey Dobriyan 20537c2776eeSAlexey Dobriyan flush_work(&net->xfrm.state_hash_work); 2054e1760bd5SEric W. Biederman audit_info.loginuid = INVALID_UID; 20557c2776eeSAlexey Dobriyan audit_info.sessionid = -1; 20567c2776eeSAlexey Dobriyan audit_info.secid = 0; 20577c2776eeSAlexey Dobriyan xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info); 20587c2776eeSAlexey Dobriyan flush_work(&net->xfrm.state_gc_work); 20597c2776eeSAlexey Dobriyan 20609d4139c7SAlexey Dobriyan WARN_ON(!list_empty(&net->xfrm.state_all)); 206173d189dcSAlexey Dobriyan 2062529983ecSAlexey Dobriyan sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); 2063b754a4fdSAlexey Dobriyan WARN_ON(!hlist_empty(net->xfrm.state_byspi)); 2064b754a4fdSAlexey Dobriyan xfrm_hash_free(net->xfrm.state_byspi, sz); 2065d320bbb3SAlexey Dobriyan WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); 2066d320bbb3SAlexey Dobriyan xfrm_hash_free(net->xfrm.state_bysrc, sz); 206773d189dcSAlexey Dobriyan WARN_ON(!hlist_empty(net->xfrm.state_bydst)); 206873d189dcSAlexey Dobriyan xfrm_hash_free(net->xfrm.state_bydst, sz); 20691da177e4SLinus Torvalds } 20701da177e4SLinus Torvalds 2071ab5f5e8bSJoy Latten #ifdef CONFIG_AUDITSYSCALL 2072cf35f43eSIlpo Järvinen static void xfrm_audit_helper_sainfo(struct xfrm_state *x, 2073ab5f5e8bSJoy Latten struct audit_buffer *audit_buf) 2074ab5f5e8bSJoy Latten { 207568277accSPaul Moore struct xfrm_sec_ctx *ctx = x->security; 207668277accSPaul Moore u32 spi = ntohl(x->id.spi); 207768277accSPaul Moore 207868277accSPaul Moore if (ctx) 2079ab5f5e8bSJoy Latten audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", 208068277accSPaul Moore ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); 2081ab5f5e8bSJoy Latten 2082ab5f5e8bSJoy Latten switch(x->props.family) { 2083ab5f5e8bSJoy Latten case AF_INET: 208421454aaaSHarvey Harrison audit_log_format(audit_buf, " src=%pI4 dst=%pI4", 208521454aaaSHarvey Harrison &x->props.saddr.a4, &x->id.daddr.a4); 2086ab5f5e8bSJoy Latten break; 2087ab5f5e8bSJoy Latten case AF_INET6: 20885b095d98SHarvey Harrison audit_log_format(audit_buf, " src=%pI6 dst=%pI6", 2089fdb46ee7SHarvey Harrison x->props.saddr.a6, x->id.daddr.a6); 2090ab5f5e8bSJoy Latten break; 2091ab5f5e8bSJoy Latten } 209268277accSPaul Moore 209368277accSPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); 2094ab5f5e8bSJoy Latten } 2095ab5f5e8bSJoy Latten 2096cf35f43eSIlpo Järvinen static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, 2097afeb14b4SPaul Moore struct audit_buffer *audit_buf) 2098afeb14b4SPaul Moore { 2099b71d1d42SEric Dumazet const struct iphdr *iph4; 2100b71d1d42SEric Dumazet const struct ipv6hdr *iph6; 2101afeb14b4SPaul Moore 2102afeb14b4SPaul Moore switch (family) { 2103afeb14b4SPaul Moore case AF_INET: 2104afeb14b4SPaul Moore iph4 = ip_hdr(skb); 210521454aaaSHarvey Harrison audit_log_format(audit_buf, " src=%pI4 dst=%pI4", 210621454aaaSHarvey Harrison &iph4->saddr, &iph4->daddr); 2107afeb14b4SPaul Moore break; 2108afeb14b4SPaul Moore case AF_INET6: 2109afeb14b4SPaul Moore iph6 = ipv6_hdr(skb); 2110afeb14b4SPaul Moore audit_log_format(audit_buf, 21115b095d98SHarvey Harrison " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", 2112fdb46ee7SHarvey Harrison &iph6->saddr,&iph6->daddr, 2113afeb14b4SPaul Moore iph6->flow_lbl[0] & 0x0f, 2114afeb14b4SPaul Moore iph6->flow_lbl[1], 2115afeb14b4SPaul Moore iph6->flow_lbl[2]); 2116afeb14b4SPaul Moore break; 2117afeb14b4SPaul Moore } 2118afeb14b4SPaul Moore } 2119afeb14b4SPaul Moore 212068277accSPaul Moore void xfrm_audit_state_add(struct xfrm_state *x, int result, 2121e1760bd5SEric W. Biederman kuid_t auid, u32 sessionid, u32 secid) 2122ab5f5e8bSJoy Latten { 2123ab5f5e8bSJoy Latten struct audit_buffer *audit_buf; 2124ab5f5e8bSJoy Latten 2125afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SAD-add"); 2126ab5f5e8bSJoy Latten if (audit_buf == NULL) 2127ab5f5e8bSJoy Latten return; 21282532386fSEric Paris xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); 2129afeb14b4SPaul Moore xfrm_audit_helper_sainfo(x, audit_buf); 2130afeb14b4SPaul Moore audit_log_format(audit_buf, " res=%u", result); 2131ab5f5e8bSJoy Latten audit_log_end(audit_buf); 2132ab5f5e8bSJoy Latten } 2133ab5f5e8bSJoy Latten EXPORT_SYMBOL_GPL(xfrm_audit_state_add); 2134ab5f5e8bSJoy Latten 213568277accSPaul Moore void xfrm_audit_state_delete(struct xfrm_state *x, int result, 2136e1760bd5SEric W. Biederman kuid_t auid, u32 sessionid, u32 secid) 2137ab5f5e8bSJoy Latten { 2138ab5f5e8bSJoy Latten struct audit_buffer *audit_buf; 2139ab5f5e8bSJoy Latten 2140afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SAD-delete"); 2141ab5f5e8bSJoy Latten if (audit_buf == NULL) 2142ab5f5e8bSJoy Latten return; 21432532386fSEric Paris xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); 2144afeb14b4SPaul Moore xfrm_audit_helper_sainfo(x, audit_buf); 2145afeb14b4SPaul Moore audit_log_format(audit_buf, " res=%u", result); 2146ab5f5e8bSJoy Latten audit_log_end(audit_buf); 2147ab5f5e8bSJoy Latten } 2148ab5f5e8bSJoy Latten EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); 2149afeb14b4SPaul Moore 2150afeb14b4SPaul Moore void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 2151afeb14b4SPaul Moore struct sk_buff *skb) 2152afeb14b4SPaul Moore { 2153afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2154afeb14b4SPaul Moore u32 spi; 2155afeb14b4SPaul Moore 2156afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-replay-overflow"); 2157afeb14b4SPaul Moore if (audit_buf == NULL) 2158afeb14b4SPaul Moore return; 2159afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); 2160afeb14b4SPaul Moore /* don't record the sequence number because it's inherent in this kind 2161afeb14b4SPaul Moore * of audit message */ 2162afeb14b4SPaul Moore spi = ntohl(x->id.spi); 2163afeb14b4SPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); 2164afeb14b4SPaul Moore audit_log_end(audit_buf); 2165afeb14b4SPaul Moore } 2166afeb14b4SPaul Moore EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); 2167afeb14b4SPaul Moore 21689fdc4883SSteffen Klassert void xfrm_audit_state_replay(struct xfrm_state *x, 2169afeb14b4SPaul Moore struct sk_buff *skb, __be32 net_seq) 2170afeb14b4SPaul Moore { 2171afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2172afeb14b4SPaul Moore u32 spi; 2173afeb14b4SPaul Moore 2174afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-replayed-pkt"); 2175afeb14b4SPaul Moore if (audit_buf == NULL) 2176afeb14b4SPaul Moore return; 2177afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); 2178afeb14b4SPaul Moore spi = ntohl(x->id.spi); 2179afeb14b4SPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", 2180afeb14b4SPaul Moore spi, spi, ntohl(net_seq)); 2181afeb14b4SPaul Moore audit_log_end(audit_buf); 2182afeb14b4SPaul Moore } 21839fdc4883SSteffen Klassert EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); 2184afeb14b4SPaul Moore 2185afeb14b4SPaul Moore void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) 2186afeb14b4SPaul Moore { 2187afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2188afeb14b4SPaul Moore 2189afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-notfound"); 2190afeb14b4SPaul Moore if (audit_buf == NULL) 2191afeb14b4SPaul Moore return; 2192afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, family, audit_buf); 2193afeb14b4SPaul Moore audit_log_end(audit_buf); 2194afeb14b4SPaul Moore } 2195afeb14b4SPaul Moore EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); 2196afeb14b4SPaul Moore 2197afeb14b4SPaul Moore void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 2198afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq) 2199afeb14b4SPaul Moore { 2200afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2201afeb14b4SPaul Moore u32 spi; 2202afeb14b4SPaul Moore 2203afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-notfound"); 2204afeb14b4SPaul Moore if (audit_buf == NULL) 2205afeb14b4SPaul Moore return; 2206afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, family, audit_buf); 2207afeb14b4SPaul Moore spi = ntohl(net_spi); 2208afeb14b4SPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", 2209afeb14b4SPaul Moore spi, spi, ntohl(net_seq)); 2210afeb14b4SPaul Moore audit_log_end(audit_buf); 2211afeb14b4SPaul Moore } 2212afeb14b4SPaul Moore EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); 2213afeb14b4SPaul Moore 2214afeb14b4SPaul Moore void xfrm_audit_state_icvfail(struct xfrm_state *x, 2215afeb14b4SPaul Moore struct sk_buff *skb, u8 proto) 2216afeb14b4SPaul Moore { 2217afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2218afeb14b4SPaul Moore __be32 net_spi; 2219afeb14b4SPaul Moore __be32 net_seq; 2220afeb14b4SPaul Moore 2221afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-icv-failure"); 2222afeb14b4SPaul Moore if (audit_buf == NULL) 2223afeb14b4SPaul Moore return; 2224afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); 2225afeb14b4SPaul Moore if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { 2226afeb14b4SPaul Moore u32 spi = ntohl(net_spi); 2227afeb14b4SPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", 2228afeb14b4SPaul Moore spi, spi, ntohl(net_seq)); 2229afeb14b4SPaul Moore } 2230afeb14b4SPaul Moore audit_log_end(audit_buf); 2231afeb14b4SPaul Moore } 2232afeb14b4SPaul Moore EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); 2233ab5f5e8bSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 2234