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 381da177e4SLinus Torvalds static DEFINE_SPINLOCK(xfrm_state_lock); 391da177e4SLinus Torvalds 40f034b5d4SDavid S. Miller static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; 411da177e4SLinus Torvalds 4217c2a42aSHerbert Xu static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); 4317c2a42aSHerbert Xu static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); 4417c2a42aSHerbert Xu 4564d0cd00SAlexey Dobriyan static inline unsigned int xfrm_dst_hash(struct net *net, 462ab38503SDavid S. Miller const xfrm_address_t *daddr, 472ab38503SDavid S. Miller const xfrm_address_t *saddr, 48c1969f29SDavid S. Miller u32 reqid, 49a624c108SDavid S. Miller unsigned short family) 50a624c108SDavid S. Miller { 5164d0cd00SAlexey Dobriyan return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); 52a624c108SDavid S. Miller } 53a624c108SDavid S. Miller 5464d0cd00SAlexey Dobriyan static inline unsigned int xfrm_src_hash(struct net *net, 552ab38503SDavid S. Miller const xfrm_address_t *daddr, 562ab38503SDavid S. Miller const xfrm_address_t *saddr, 5744e36b42SDavid S. Miller unsigned short family) 58f034b5d4SDavid S. Miller { 5964d0cd00SAlexey Dobriyan return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); 60f034b5d4SDavid S. Miller } 61f034b5d4SDavid S. Miller 622575b654SDavid S. Miller static inline unsigned int 632ab38503SDavid S. Miller xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, 642ab38503SDavid S. Miller __be32 spi, u8 proto, unsigned short family) 65f034b5d4SDavid S. Miller { 6664d0cd00SAlexey Dobriyan return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); 67f034b5d4SDavid S. Miller } 68f034b5d4SDavid S. Miller 69f034b5d4SDavid S. Miller static void xfrm_hash_transfer(struct hlist_head *list, 70f034b5d4SDavid S. Miller struct hlist_head *ndsttable, 71f034b5d4SDavid S. Miller struct hlist_head *nsrctable, 72f034b5d4SDavid S. Miller struct hlist_head *nspitable, 73f034b5d4SDavid S. Miller unsigned int nhashmask) 74f034b5d4SDavid S. Miller { 75f034b5d4SDavid S. Miller struct hlist_node *entry, *tmp; 76f034b5d4SDavid S. Miller struct xfrm_state *x; 77f034b5d4SDavid S. Miller 78f034b5d4SDavid S. Miller hlist_for_each_entry_safe(x, entry, tmp, list, bydst) { 79f034b5d4SDavid S. Miller unsigned int h; 80f034b5d4SDavid S. Miller 81c1969f29SDavid S. Miller h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, 82c1969f29SDavid S. Miller x->props.reqid, x->props.family, 83c1969f29SDavid S. Miller nhashmask); 84f034b5d4SDavid S. Miller hlist_add_head(&x->bydst, ndsttable+h); 85f034b5d4SDavid S. Miller 86667bbcb6SMasahide NAKAMURA h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, 87667bbcb6SMasahide NAKAMURA x->props.family, 88f034b5d4SDavid S. Miller nhashmask); 89f034b5d4SDavid S. Miller hlist_add_head(&x->bysrc, nsrctable+h); 90f034b5d4SDavid S. Miller 917b4dc360SMasahide NAKAMURA if (x->id.spi) { 927b4dc360SMasahide NAKAMURA h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, 937b4dc360SMasahide NAKAMURA x->id.proto, x->props.family, 947b4dc360SMasahide NAKAMURA nhashmask); 95f034b5d4SDavid S. Miller hlist_add_head(&x->byspi, nspitable+h); 96f034b5d4SDavid S. Miller } 97f034b5d4SDavid S. Miller } 987b4dc360SMasahide NAKAMURA } 99f034b5d4SDavid S. Miller 10063082733SAlexey Dobriyan static unsigned long xfrm_hash_new_size(unsigned int state_hmask) 101f034b5d4SDavid S. Miller { 10263082733SAlexey Dobriyan return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); 103f034b5d4SDavid S. Miller } 104f034b5d4SDavid S. Miller 105f034b5d4SDavid S. Miller static DEFINE_MUTEX(hash_resize_mutex); 106f034b5d4SDavid S. Miller 10763082733SAlexey Dobriyan static void xfrm_hash_resize(struct work_struct *work) 108f034b5d4SDavid S. Miller { 10963082733SAlexey Dobriyan struct net *net = container_of(work, struct net, xfrm.state_hash_work); 110f034b5d4SDavid S. Miller struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; 111f034b5d4SDavid S. Miller unsigned long nsize, osize; 112f034b5d4SDavid S. Miller unsigned int nhashmask, ohashmask; 113f034b5d4SDavid S. Miller int i; 114f034b5d4SDavid S. Miller 115f034b5d4SDavid S. Miller mutex_lock(&hash_resize_mutex); 116f034b5d4SDavid S. Miller 11763082733SAlexey Dobriyan nsize = xfrm_hash_new_size(net->xfrm.state_hmask); 11844e36b42SDavid S. Miller ndst = xfrm_hash_alloc(nsize); 119f034b5d4SDavid S. Miller if (!ndst) 120f034b5d4SDavid S. Miller goto out_unlock; 12144e36b42SDavid S. Miller nsrc = xfrm_hash_alloc(nsize); 122f034b5d4SDavid S. Miller if (!nsrc) { 12344e36b42SDavid S. Miller xfrm_hash_free(ndst, nsize); 124f034b5d4SDavid S. Miller goto out_unlock; 125f034b5d4SDavid S. Miller } 12644e36b42SDavid S. Miller nspi = xfrm_hash_alloc(nsize); 127f034b5d4SDavid S. Miller if (!nspi) { 12844e36b42SDavid S. Miller xfrm_hash_free(ndst, nsize); 12944e36b42SDavid S. Miller xfrm_hash_free(nsrc, nsize); 130f034b5d4SDavid S. Miller goto out_unlock; 131f034b5d4SDavid S. Miller } 132f034b5d4SDavid S. Miller 133f034b5d4SDavid S. Miller spin_lock_bh(&xfrm_state_lock); 134f034b5d4SDavid S. Miller 135f034b5d4SDavid S. Miller nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; 13663082733SAlexey Dobriyan for (i = net->xfrm.state_hmask; i >= 0; i--) 13763082733SAlexey Dobriyan xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, 138f034b5d4SDavid S. Miller nhashmask); 139f034b5d4SDavid S. Miller 14063082733SAlexey Dobriyan odst = net->xfrm.state_bydst; 14163082733SAlexey Dobriyan osrc = net->xfrm.state_bysrc; 14263082733SAlexey Dobriyan ospi = net->xfrm.state_byspi; 14363082733SAlexey Dobriyan ohashmask = net->xfrm.state_hmask; 144f034b5d4SDavid S. Miller 14563082733SAlexey Dobriyan net->xfrm.state_bydst = ndst; 14663082733SAlexey Dobriyan net->xfrm.state_bysrc = nsrc; 14763082733SAlexey Dobriyan net->xfrm.state_byspi = nspi; 14863082733SAlexey Dobriyan net->xfrm.state_hmask = nhashmask; 149f034b5d4SDavid S. Miller 150f034b5d4SDavid S. Miller spin_unlock_bh(&xfrm_state_lock); 151f034b5d4SDavid S. Miller 152f034b5d4SDavid S. Miller osize = (ohashmask + 1) * sizeof(struct hlist_head); 15344e36b42SDavid S. Miller xfrm_hash_free(odst, osize); 15444e36b42SDavid S. Miller xfrm_hash_free(osrc, osize); 15544e36b42SDavid S. Miller xfrm_hash_free(ospi, osize); 156f034b5d4SDavid S. Miller 157f034b5d4SDavid S. Miller out_unlock: 158f034b5d4SDavid S. Miller mutex_unlock(&hash_resize_mutex); 159f034b5d4SDavid S. Miller } 160f034b5d4SDavid S. Miller 16144abdc30SCong Wang static DEFINE_SPINLOCK(xfrm_state_afinfo_lock); 16244abdc30SCong Wang static struct xfrm_state_afinfo __rcu *xfrm_state_afinfo[NPROTO]; 1631da177e4SLinus Torvalds 1641da177e4SLinus Torvalds static DEFINE_SPINLOCK(xfrm_state_gc_lock); 1651da177e4SLinus Torvalds 16653bc6b4dSJamal Hadi Salim int __xfrm_state_delete(struct xfrm_state *x); 1671da177e4SLinus Torvalds 168980ebd25SJamal Hadi Salim int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); 16915e47304SEric W. Biederman void km_state_expired(struct xfrm_state *x, int hard, u32 portid); 1701da177e4SLinus Torvalds 171aa5d62ccSHerbert Xu static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family) 172aa5d62ccSHerbert Xu { 173aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 174aa5d62ccSHerbert Xu if (unlikely(family >= NPROTO)) 175aa5d62ccSHerbert Xu return NULL; 17644abdc30SCong Wang spin_lock_bh(&xfrm_state_afinfo_lock); 177aa5d62ccSHerbert Xu afinfo = xfrm_state_afinfo[family]; 178aa5d62ccSHerbert Xu if (unlikely(!afinfo)) 17944abdc30SCong Wang spin_unlock_bh(&xfrm_state_afinfo_lock); 180aa5d62ccSHerbert Xu return afinfo; 181aa5d62ccSHerbert Xu } 182aa5d62ccSHerbert Xu 183aa5d62ccSHerbert Xu static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo) 184aa5d62ccSHerbert Xu { 18544abdc30SCong Wang spin_unlock_bh(&xfrm_state_afinfo_lock); 186aa5d62ccSHerbert Xu } 187aa5d62ccSHerbert Xu 188533cb5b0SEric Dumazet int xfrm_register_type(const struct xfrm_type *type, unsigned short family) 189aa5d62ccSHerbert Xu { 190aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo = xfrm_state_lock_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; 197aa5d62ccSHerbert Xu 198aa5d62ccSHerbert Xu if (likely(typemap[type->proto] == NULL)) 199aa5d62ccSHerbert Xu typemap[type->proto] = type; 200aa5d62ccSHerbert Xu else 201aa5d62ccSHerbert Xu err = -EEXIST; 202aa5d62ccSHerbert Xu xfrm_state_unlock_afinfo(afinfo); 203aa5d62ccSHerbert Xu return err; 204aa5d62ccSHerbert Xu } 205aa5d62ccSHerbert Xu EXPORT_SYMBOL(xfrm_register_type); 206aa5d62ccSHerbert Xu 207533cb5b0SEric Dumazet int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) 208aa5d62ccSHerbert Xu { 209aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); 210533cb5b0SEric Dumazet const struct xfrm_type **typemap; 211aa5d62ccSHerbert Xu int err = 0; 212aa5d62ccSHerbert Xu 213aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 214aa5d62ccSHerbert Xu return -EAFNOSUPPORT; 215aa5d62ccSHerbert Xu typemap = afinfo->type_map; 216aa5d62ccSHerbert Xu 217aa5d62ccSHerbert Xu if (unlikely(typemap[type->proto] != type)) 218aa5d62ccSHerbert Xu err = -ENOENT; 219aa5d62ccSHerbert Xu else 220aa5d62ccSHerbert Xu typemap[type->proto] = NULL; 221aa5d62ccSHerbert Xu xfrm_state_unlock_afinfo(afinfo); 222aa5d62ccSHerbert Xu return err; 223aa5d62ccSHerbert Xu } 224aa5d62ccSHerbert Xu EXPORT_SYMBOL(xfrm_unregister_type); 225aa5d62ccSHerbert Xu 226533cb5b0SEric Dumazet static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) 227aa5d62ccSHerbert Xu { 228aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 229533cb5b0SEric Dumazet const struct xfrm_type **typemap; 230533cb5b0SEric Dumazet const struct xfrm_type *type; 231aa5d62ccSHerbert Xu int modload_attempted = 0; 232aa5d62ccSHerbert Xu 233aa5d62ccSHerbert Xu retry: 234aa5d62ccSHerbert Xu afinfo = xfrm_state_get_afinfo(family); 235aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 236aa5d62ccSHerbert Xu return NULL; 237aa5d62ccSHerbert Xu typemap = afinfo->type_map; 238aa5d62ccSHerbert Xu 239aa5d62ccSHerbert Xu type = typemap[proto]; 240aa5d62ccSHerbert Xu if (unlikely(type && !try_module_get(type->owner))) 241aa5d62ccSHerbert Xu type = NULL; 242aa5d62ccSHerbert Xu if (!type && !modload_attempted) { 243aa5d62ccSHerbert Xu xfrm_state_put_afinfo(afinfo); 244aa5d62ccSHerbert Xu request_module("xfrm-type-%d-%d", family, proto); 245aa5d62ccSHerbert Xu modload_attempted = 1; 246aa5d62ccSHerbert Xu goto retry; 247aa5d62ccSHerbert Xu } 248aa5d62ccSHerbert Xu 249aa5d62ccSHerbert Xu xfrm_state_put_afinfo(afinfo); 250aa5d62ccSHerbert Xu return type; 251aa5d62ccSHerbert Xu } 252aa5d62ccSHerbert Xu 253533cb5b0SEric Dumazet static void xfrm_put_type(const struct xfrm_type *type) 254aa5d62ccSHerbert Xu { 255aa5d62ccSHerbert Xu module_put(type->owner); 256aa5d62ccSHerbert Xu } 257aa5d62ccSHerbert Xu 258aa5d62ccSHerbert Xu int xfrm_register_mode(struct xfrm_mode *mode, int family) 259aa5d62ccSHerbert Xu { 260aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 261aa5d62ccSHerbert Xu struct xfrm_mode **modemap; 262aa5d62ccSHerbert Xu int err; 263aa5d62ccSHerbert Xu 264aa5d62ccSHerbert Xu if (unlikely(mode->encap >= XFRM_MODE_MAX)) 265aa5d62ccSHerbert Xu return -EINVAL; 266aa5d62ccSHerbert Xu 267aa5d62ccSHerbert Xu afinfo = xfrm_state_lock_afinfo(family); 268aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 269aa5d62ccSHerbert Xu return -EAFNOSUPPORT; 270aa5d62ccSHerbert Xu 271aa5d62ccSHerbert Xu err = -EEXIST; 272aa5d62ccSHerbert Xu modemap = afinfo->mode_map; 27317c2a42aSHerbert Xu if (modemap[mode->encap]) 27417c2a42aSHerbert Xu goto out; 27517c2a42aSHerbert Xu 27617c2a42aSHerbert Xu err = -ENOENT; 27717c2a42aSHerbert Xu if (!try_module_get(afinfo->owner)) 27817c2a42aSHerbert Xu goto out; 27917c2a42aSHerbert Xu 28017c2a42aSHerbert Xu mode->afinfo = afinfo; 281aa5d62ccSHerbert Xu modemap[mode->encap] = mode; 282aa5d62ccSHerbert Xu err = 0; 283aa5d62ccSHerbert Xu 28417c2a42aSHerbert Xu out: 285aa5d62ccSHerbert Xu xfrm_state_unlock_afinfo(afinfo); 286aa5d62ccSHerbert Xu return err; 287aa5d62ccSHerbert Xu } 288aa5d62ccSHerbert Xu EXPORT_SYMBOL(xfrm_register_mode); 289aa5d62ccSHerbert Xu 290aa5d62ccSHerbert Xu int xfrm_unregister_mode(struct xfrm_mode *mode, int family) 291aa5d62ccSHerbert Xu { 292aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 293aa5d62ccSHerbert Xu struct xfrm_mode **modemap; 294aa5d62ccSHerbert Xu int err; 295aa5d62ccSHerbert Xu 296aa5d62ccSHerbert Xu if (unlikely(mode->encap >= XFRM_MODE_MAX)) 297aa5d62ccSHerbert Xu return -EINVAL; 298aa5d62ccSHerbert Xu 299aa5d62ccSHerbert Xu afinfo = xfrm_state_lock_afinfo(family); 300aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 301aa5d62ccSHerbert Xu return -EAFNOSUPPORT; 302aa5d62ccSHerbert Xu 303aa5d62ccSHerbert Xu err = -ENOENT; 304aa5d62ccSHerbert Xu modemap = afinfo->mode_map; 305aa5d62ccSHerbert Xu if (likely(modemap[mode->encap] == mode)) { 306aa5d62ccSHerbert Xu modemap[mode->encap] = NULL; 30717c2a42aSHerbert Xu module_put(mode->afinfo->owner); 308aa5d62ccSHerbert Xu err = 0; 309aa5d62ccSHerbert Xu } 310aa5d62ccSHerbert Xu 311aa5d62ccSHerbert Xu xfrm_state_unlock_afinfo(afinfo); 312aa5d62ccSHerbert Xu return err; 313aa5d62ccSHerbert Xu } 314aa5d62ccSHerbert Xu EXPORT_SYMBOL(xfrm_unregister_mode); 315aa5d62ccSHerbert Xu 316aa5d62ccSHerbert Xu static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) 317aa5d62ccSHerbert Xu { 318aa5d62ccSHerbert Xu struct xfrm_state_afinfo *afinfo; 319aa5d62ccSHerbert Xu struct xfrm_mode *mode; 320aa5d62ccSHerbert Xu int modload_attempted = 0; 321aa5d62ccSHerbert Xu 322aa5d62ccSHerbert Xu if (unlikely(encap >= XFRM_MODE_MAX)) 323aa5d62ccSHerbert Xu return NULL; 324aa5d62ccSHerbert Xu 325aa5d62ccSHerbert Xu retry: 326aa5d62ccSHerbert Xu afinfo = xfrm_state_get_afinfo(family); 327aa5d62ccSHerbert Xu if (unlikely(afinfo == NULL)) 328aa5d62ccSHerbert Xu return NULL; 329aa5d62ccSHerbert Xu 330aa5d62ccSHerbert Xu mode = afinfo->mode_map[encap]; 331aa5d62ccSHerbert Xu if (unlikely(mode && !try_module_get(mode->owner))) 332aa5d62ccSHerbert Xu mode = NULL; 333aa5d62ccSHerbert Xu if (!mode && !modload_attempted) { 334aa5d62ccSHerbert Xu xfrm_state_put_afinfo(afinfo); 335aa5d62ccSHerbert Xu request_module("xfrm-mode-%d-%d", family, encap); 336aa5d62ccSHerbert Xu modload_attempted = 1; 337aa5d62ccSHerbert Xu goto retry; 338aa5d62ccSHerbert Xu } 339aa5d62ccSHerbert Xu 340aa5d62ccSHerbert Xu xfrm_state_put_afinfo(afinfo); 341aa5d62ccSHerbert Xu return mode; 342aa5d62ccSHerbert Xu } 343aa5d62ccSHerbert Xu 344aa5d62ccSHerbert Xu static void xfrm_put_mode(struct xfrm_mode *mode) 345aa5d62ccSHerbert Xu { 346aa5d62ccSHerbert Xu module_put(mode->owner); 347aa5d62ccSHerbert Xu } 348aa5d62ccSHerbert Xu 3491da177e4SLinus Torvalds static void xfrm_state_gc_destroy(struct xfrm_state *x) 3501da177e4SLinus Torvalds { 3519e0d57fdSYury Polyanskiy tasklet_hrtimer_cancel(&x->mtimer); 352a47f0ce0SDavid S. Miller del_timer_sync(&x->rtimer); 3531da177e4SLinus Torvalds kfree(x->aalg); 3541da177e4SLinus Torvalds kfree(x->ealg); 3551da177e4SLinus Torvalds kfree(x->calg); 3561da177e4SLinus Torvalds kfree(x->encap); 357060f02a3SNoriaki TAKAMIYA kfree(x->coaddr); 358d8647b79SSteffen Klassert kfree(x->replay_esn); 359d8647b79SSteffen Klassert kfree(x->preplay_esn); 36013996378SHerbert Xu if (x->inner_mode) 36113996378SHerbert Xu xfrm_put_mode(x->inner_mode); 362df9dcb45SKazunori MIYAZAWA if (x->inner_mode_iaf) 363df9dcb45SKazunori MIYAZAWA xfrm_put_mode(x->inner_mode_iaf); 36413996378SHerbert Xu if (x->outer_mode) 36513996378SHerbert Xu xfrm_put_mode(x->outer_mode); 3661da177e4SLinus Torvalds if (x->type) { 3671da177e4SLinus Torvalds x->type->destructor(x); 3681da177e4SLinus Torvalds xfrm_put_type(x->type); 3691da177e4SLinus Torvalds } 370df71837dSTrent Jaeger security_xfrm_state_free(x); 3711da177e4SLinus Torvalds kfree(x); 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds 374c7837144SAlexey Dobriyan static void xfrm_state_gc_task(struct work_struct *work) 3751da177e4SLinus Torvalds { 376c7837144SAlexey Dobriyan struct net *net = container_of(work, struct net, xfrm.state_gc_work); 37712a169e7SHerbert Xu struct xfrm_state *x; 37812a169e7SHerbert Xu struct hlist_node *entry, *tmp; 37912a169e7SHerbert Xu struct hlist_head gc_list; 3801da177e4SLinus Torvalds 3811da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_gc_lock); 382c7837144SAlexey Dobriyan hlist_move_list(&net->xfrm.state_gc_list, &gc_list); 3831da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_gc_lock); 3841da177e4SLinus Torvalds 38512a169e7SHerbert Xu hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist) 3861da177e4SLinus Torvalds xfrm_state_gc_destroy(x); 3878f126e37SDavid S. Miller 38850a30657SAlexey Dobriyan wake_up(&net->xfrm.km_waitq); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds static inline unsigned long make_jiffies(long secs) 3921da177e4SLinus Torvalds { 3931da177e4SLinus Torvalds if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) 3941da177e4SLinus Torvalds return MAX_SCHEDULE_TIMEOUT-1; 3951da177e4SLinus Torvalds else 3961da177e4SLinus Torvalds return secs*HZ; 3971da177e4SLinus Torvalds } 3981da177e4SLinus Torvalds 3999e0d57fdSYury Polyanskiy static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me) 4001da177e4SLinus Torvalds { 4019e0d57fdSYury Polyanskiy struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); 4029e0d57fdSYury Polyanskiy struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); 40398806f75SAlexey Dobriyan struct net *net = xs_net(x); 4049d729f72SJames Morris unsigned long now = get_seconds(); 4051da177e4SLinus Torvalds long next = LONG_MAX; 4061da177e4SLinus Torvalds int warn = 0; 407161a09e7SJoy Latten int err = 0; 4081da177e4SLinus Torvalds 4091da177e4SLinus Torvalds spin_lock(&x->lock); 4101da177e4SLinus Torvalds if (x->km.state == XFRM_STATE_DEAD) 4111da177e4SLinus Torvalds goto out; 4121da177e4SLinus Torvalds if (x->km.state == XFRM_STATE_EXPIRED) 4131da177e4SLinus Torvalds goto expired; 4141da177e4SLinus Torvalds if (x->lft.hard_add_expires_seconds) { 4151da177e4SLinus Torvalds long tmo = x->lft.hard_add_expires_seconds + 4161da177e4SLinus Torvalds x->curlft.add_time - now; 417e3c0d047SFan Du if (tmo <= 0) { 418e3c0d047SFan Du if (x->xflags & XFRM_SOFT_EXPIRE) { 419e3c0d047SFan Du /* enter hard expire without soft expire first?! 420e3c0d047SFan Du * setting a new date could trigger this. 421e3c0d047SFan Du * workarbound: fix x->curflt.add_time by below: 422e3c0d047SFan Du */ 423e3c0d047SFan Du x->curlft.add_time = now - x->saved_tmo - 1; 424e3c0d047SFan Du tmo = x->lft.hard_add_expires_seconds - x->saved_tmo; 425e3c0d047SFan Du } else 4261da177e4SLinus Torvalds goto expired; 427e3c0d047SFan Du } 4281da177e4SLinus Torvalds if (tmo < next) 4291da177e4SLinus Torvalds next = tmo; 4301da177e4SLinus Torvalds } 4311da177e4SLinus Torvalds if (x->lft.hard_use_expires_seconds) { 4321da177e4SLinus Torvalds long tmo = x->lft.hard_use_expires_seconds + 4331da177e4SLinus Torvalds (x->curlft.use_time ? : now) - now; 4341da177e4SLinus Torvalds if (tmo <= 0) 4351da177e4SLinus Torvalds goto expired; 4361da177e4SLinus Torvalds if (tmo < next) 4371da177e4SLinus Torvalds next = tmo; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds if (x->km.dying) 4401da177e4SLinus Torvalds goto resched; 4411da177e4SLinus Torvalds if (x->lft.soft_add_expires_seconds) { 4421da177e4SLinus Torvalds long tmo = x->lft.soft_add_expires_seconds + 4431da177e4SLinus Torvalds x->curlft.add_time - now; 444e3c0d047SFan Du if (tmo <= 0) { 4451da177e4SLinus Torvalds warn = 1; 446e3c0d047SFan Du x->xflags &= ~XFRM_SOFT_EXPIRE; 447e3c0d047SFan Du } else if (tmo < next) { 4481da177e4SLinus Torvalds next = tmo; 449e3c0d047SFan Du x->xflags |= XFRM_SOFT_EXPIRE; 450e3c0d047SFan Du x->saved_tmo = tmo; 451e3c0d047SFan Du } 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds if (x->lft.soft_use_expires_seconds) { 4541da177e4SLinus Torvalds long tmo = x->lft.soft_use_expires_seconds + 4551da177e4SLinus Torvalds (x->curlft.use_time ? : now) - now; 4561da177e4SLinus Torvalds if (tmo <= 0) 4571da177e4SLinus Torvalds warn = 1; 4581da177e4SLinus Torvalds else if (tmo < next) 4591da177e4SLinus Torvalds next = tmo; 4601da177e4SLinus Torvalds } 4611da177e4SLinus Torvalds 4624666faabSHerbert Xu x->km.dying = warn; 4631da177e4SLinus Torvalds if (warn) 46453bc6b4dSJamal Hadi Salim km_state_expired(x, 0, 0); 4651da177e4SLinus Torvalds resched: 4669e0d57fdSYury Polyanskiy if (next != LONG_MAX){ 4679e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); 4689e0d57fdSYury Polyanskiy } 469a47f0ce0SDavid S. Miller 4701da177e4SLinus Torvalds goto out; 4711da177e4SLinus Torvalds 4721da177e4SLinus Torvalds expired: 4731da177e4SLinus Torvalds if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { 4741da177e4SLinus Torvalds x->km.state = XFRM_STATE_EXPIRED; 47598806f75SAlexey Dobriyan wake_up(&net->xfrm.km_waitq); 4761da177e4SLinus Torvalds next = 2; 4771da177e4SLinus Torvalds goto resched; 4781da177e4SLinus Torvalds } 479161a09e7SJoy Latten 480161a09e7SJoy Latten err = __xfrm_state_delete(x); 481161a09e7SJoy Latten if (!err && x->id.spi) 48253bc6b4dSJamal Hadi Salim km_state_expired(x, 1, 0); 4831da177e4SLinus Torvalds 484ab5f5e8bSJoy Latten xfrm_audit_state_delete(x, err ? 0 : 1, 4852532386fSEric Paris audit_get_loginuid(current), 4862532386fSEric Paris audit_get_sessionid(current), 0); 487161a09e7SJoy Latten 4881da177e4SLinus Torvalds out: 4891da177e4SLinus Torvalds spin_unlock(&x->lock); 4909e0d57fdSYury Polyanskiy return HRTIMER_NORESTART; 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds 4930ac84752SDavid S. Miller static void xfrm_replay_timer_handler(unsigned long data); 4940ac84752SDavid S. Miller 495673c09beSAlexey Dobriyan struct xfrm_state *xfrm_state_alloc(struct net *net) 4961da177e4SLinus Torvalds { 4971da177e4SLinus Torvalds struct xfrm_state *x; 4981da177e4SLinus Torvalds 4990da974f4SPanagiotis Issaris x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds if (x) { 502673c09beSAlexey Dobriyan write_pnet(&x->xs_net, net); 5031da177e4SLinus Torvalds atomic_set(&x->refcnt, 1); 5041da177e4SLinus Torvalds atomic_set(&x->tunnel_users, 0); 50512a169e7SHerbert Xu INIT_LIST_HEAD(&x->km.all); 5068f126e37SDavid S. Miller INIT_HLIST_NODE(&x->bydst); 5078f126e37SDavid S. Miller INIT_HLIST_NODE(&x->bysrc); 5088f126e37SDavid S. Miller INIT_HLIST_NODE(&x->byspi); 5099e0d57fdSYury Polyanskiy tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS); 510b24b8a24SPavel Emelyanov setup_timer(&x->rtimer, xfrm_replay_timer_handler, 511b24b8a24SPavel Emelyanov (unsigned long)x); 5129d729f72SJames Morris x->curlft.add_time = get_seconds(); 5131da177e4SLinus Torvalds x->lft.soft_byte_limit = XFRM_INF; 5141da177e4SLinus Torvalds x->lft.soft_packet_limit = XFRM_INF; 5151da177e4SLinus Torvalds x->lft.hard_byte_limit = XFRM_INF; 5161da177e4SLinus Torvalds x->lft.hard_packet_limit = XFRM_INF; 517f8cd5488SJamal Hadi Salim x->replay_maxage = 0; 518f8cd5488SJamal Hadi Salim x->replay_maxdiff = 0; 519df9dcb45SKazunori MIYAZAWA x->inner_mode = NULL; 520df9dcb45SKazunori MIYAZAWA x->inner_mode_iaf = NULL; 5211da177e4SLinus Torvalds spin_lock_init(&x->lock); 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds return x; 5241da177e4SLinus Torvalds } 5251da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_alloc); 5261da177e4SLinus Torvalds 5271da177e4SLinus Torvalds void __xfrm_state_destroy(struct xfrm_state *x) 5281da177e4SLinus Torvalds { 52998806f75SAlexey Dobriyan struct net *net = xs_net(x); 53098806f75SAlexey Dobriyan 531547b792cSIlpo Järvinen WARN_ON(x->km.state != XFRM_STATE_DEAD); 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_gc_lock); 53498806f75SAlexey Dobriyan hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); 5351da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_gc_lock); 53698806f75SAlexey Dobriyan schedule_work(&net->xfrm.state_gc_work); 5371da177e4SLinus Torvalds } 5381da177e4SLinus Torvalds EXPORT_SYMBOL(__xfrm_state_destroy); 5391da177e4SLinus Torvalds 54053bc6b4dSJamal Hadi Salim int __xfrm_state_delete(struct xfrm_state *x) 5411da177e4SLinus Torvalds { 54298806f75SAlexey Dobriyan struct net *net = xs_net(x); 54326b15dadSJamal Hadi Salim int err = -ESRCH; 54426b15dadSJamal Hadi Salim 5451da177e4SLinus Torvalds if (x->km.state != XFRM_STATE_DEAD) { 5461da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 5471da177e4SLinus Torvalds spin_lock(&xfrm_state_lock); 54812a169e7SHerbert Xu list_del(&x->km.all); 5498f126e37SDavid S. Miller hlist_del(&x->bydst); 5508f126e37SDavid S. Miller hlist_del(&x->bysrc); 551a47f0ce0SDavid S. Miller if (x->id.spi) 5528f126e37SDavid S. Miller hlist_del(&x->byspi); 55398806f75SAlexey Dobriyan net->xfrm.state_num--; 5541da177e4SLinus Torvalds spin_unlock(&xfrm_state_lock); 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds /* All xfrm_state objects are created by xfrm_state_alloc. 5571da177e4SLinus Torvalds * The xfrm_state_alloc call gives a reference, and that 5581da177e4SLinus Torvalds * is what we are dropping here. 5591da177e4SLinus Torvalds */ 5605dba4797SPatrick McHardy xfrm_state_put(x); 56126b15dadSJamal Hadi Salim err = 0; 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds 56426b15dadSJamal Hadi Salim return err; 56526b15dadSJamal Hadi Salim } 56653bc6b4dSJamal Hadi Salim EXPORT_SYMBOL(__xfrm_state_delete); 56726b15dadSJamal Hadi Salim 56826b15dadSJamal Hadi Salim int xfrm_state_delete(struct xfrm_state *x) 5691da177e4SLinus Torvalds { 57026b15dadSJamal Hadi Salim int err; 57126b15dadSJamal Hadi Salim 5721da177e4SLinus Torvalds spin_lock_bh(&x->lock); 57326b15dadSJamal Hadi Salim err = __xfrm_state_delete(x); 5741da177e4SLinus Torvalds spin_unlock_bh(&x->lock); 57526b15dadSJamal Hadi Salim 57626b15dadSJamal Hadi Salim return err; 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_delete); 5791da177e4SLinus Torvalds 5804aa2e62cSJoy Latten #ifdef CONFIG_SECURITY_NETWORK_XFRM 5814aa2e62cSJoy Latten static inline int 5820e602451SAlexey Dobriyan xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) 5831da177e4SLinus Torvalds { 5844aa2e62cSJoy Latten int i, err = 0; 5854aa2e62cSJoy Latten 5860e602451SAlexey Dobriyan for (i = 0; i <= net->xfrm.state_hmask; i++) { 5874aa2e62cSJoy Latten struct hlist_node *entry; 5884aa2e62cSJoy Latten struct xfrm_state *x; 5894aa2e62cSJoy Latten 5900e602451SAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { 5914aa2e62cSJoy Latten if (xfrm_id_proto_match(x->id.proto, proto) && 5924aa2e62cSJoy Latten (err = security_xfrm_state_delete(x)) != 0) { 593ab5f5e8bSJoy Latten xfrm_audit_state_delete(x, 0, 594ab5f5e8bSJoy Latten audit_info->loginuid, 5952532386fSEric Paris audit_info->sessionid, 596ab5f5e8bSJoy Latten audit_info->secid); 5974aa2e62cSJoy Latten return err; 5984aa2e62cSJoy Latten } 5994aa2e62cSJoy Latten } 6004aa2e62cSJoy Latten } 6014aa2e62cSJoy Latten 6024aa2e62cSJoy Latten return err; 6034aa2e62cSJoy Latten } 6044aa2e62cSJoy Latten #else 6054aa2e62cSJoy Latten static inline int 6060e602451SAlexey Dobriyan xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) 6074aa2e62cSJoy Latten { 6084aa2e62cSJoy Latten return 0; 6094aa2e62cSJoy Latten } 6104aa2e62cSJoy Latten #endif 6114aa2e62cSJoy Latten 6120e602451SAlexey Dobriyan int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info) 6134aa2e62cSJoy Latten { 6149e64cc95SJamal Hadi Salim int i, err = 0, cnt = 0; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 6170e602451SAlexey Dobriyan err = xfrm_state_flush_secctx_check(net, proto, audit_info); 6184aa2e62cSJoy Latten if (err) 6194aa2e62cSJoy Latten goto out; 6204aa2e62cSJoy Latten 6219e64cc95SJamal Hadi Salim err = -ESRCH; 6220e602451SAlexey Dobriyan for (i = 0; i <= net->xfrm.state_hmask; i++) { 6238f126e37SDavid S. Miller struct hlist_node *entry; 6248f126e37SDavid S. Miller struct xfrm_state *x; 6251da177e4SLinus Torvalds restart: 6260e602451SAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { 6271da177e4SLinus Torvalds if (!xfrm_state_kern(x) && 6285794708fSMasahide NAKAMURA xfrm_id_proto_match(x->id.proto, proto)) { 6291da177e4SLinus Torvalds xfrm_state_hold(x); 6301da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 6311da177e4SLinus Torvalds 632161a09e7SJoy Latten err = xfrm_state_delete(x); 633ab5f5e8bSJoy Latten xfrm_audit_state_delete(x, err ? 0 : 1, 634ab5f5e8bSJoy Latten audit_info->loginuid, 6352532386fSEric Paris audit_info->sessionid, 636ab5f5e8bSJoy Latten audit_info->secid); 6371da177e4SLinus Torvalds xfrm_state_put(x); 6389e64cc95SJamal Hadi Salim if (!err) 6399e64cc95SJamal Hadi Salim cnt++; 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 6421da177e4SLinus Torvalds goto restart; 6431da177e4SLinus Torvalds } 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds } 6469e64cc95SJamal Hadi Salim if (cnt) 6474aa2e62cSJoy Latten err = 0; 6484aa2e62cSJoy Latten 6494aa2e62cSJoy Latten out: 6501da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 6510e602451SAlexey Dobriyan wake_up(&net->xfrm.km_waitq); 6524aa2e62cSJoy Latten return err; 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_flush); 6551da177e4SLinus Torvalds 656e071041bSAlexey Dobriyan void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) 65728d8909bSJamal Hadi Salim { 65828d8909bSJamal Hadi Salim spin_lock_bh(&xfrm_state_lock); 659e071041bSAlexey Dobriyan si->sadcnt = net->xfrm.state_num; 660e071041bSAlexey Dobriyan si->sadhcnt = net->xfrm.state_hmask; 66128d8909bSJamal Hadi Salim si->sadhmcnt = xfrm_state_hashmax; 66228d8909bSJamal Hadi Salim spin_unlock_bh(&xfrm_state_lock); 66328d8909bSJamal Hadi Salim } 66428d8909bSJamal Hadi Salim EXPORT_SYMBOL(xfrm_sad_getinfo); 66528d8909bSJamal Hadi Salim 6661da177e4SLinus Torvalds static int 6671a898592SDavid S. Miller xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, 66804686013SDavid S. Miller const struct xfrm_tmpl *tmpl, 66933765d06SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 6701da177e4SLinus Torvalds unsigned short family) 6711da177e4SLinus Torvalds { 6721da177e4SLinus Torvalds struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); 6731da177e4SLinus Torvalds if (!afinfo) 6741da177e4SLinus Torvalds return -1; 6758444cf71SThomas Egerer afinfo->init_tempsel(&x->sel, fl); 6768444cf71SThomas Egerer 6778444cf71SThomas Egerer if (family != tmpl->encap_family) { 6788444cf71SThomas Egerer xfrm_state_put_afinfo(afinfo); 6798444cf71SThomas Egerer afinfo = xfrm_state_get_afinfo(tmpl->encap_family); 6808444cf71SThomas Egerer if (!afinfo) 6818444cf71SThomas Egerer return -1; 6828444cf71SThomas Egerer } 6838444cf71SThomas Egerer afinfo->init_temprop(x, tmpl, daddr, saddr); 6841da177e4SLinus Torvalds xfrm_state_put_afinfo(afinfo); 6851da177e4SLinus Torvalds return 0; 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds 6889aa60088SDavid S. Miller static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, 6899aa60088SDavid S. Miller const xfrm_address_t *daddr, 6909aa60088SDavid S. Miller __be32 spi, u8 proto, 6919aa60088SDavid S. Miller unsigned short family) 692edcd5821SDavid S. Miller { 693221df1edSAlexey Dobriyan unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); 694edcd5821SDavid S. Miller struct xfrm_state *x; 6958f126e37SDavid S. Miller struct hlist_node *entry; 696edcd5821SDavid S. Miller 697221df1edSAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) { 698edcd5821SDavid S. Miller if (x->props.family != family || 699edcd5821SDavid S. Miller x->id.spi != spi || 7001802571bSWei Yongjun x->id.proto != proto || 7011802571bSWei Yongjun xfrm_addr_cmp(&x->id.daddr, daddr, family)) 702edcd5821SDavid S. Miller continue; 703edcd5821SDavid S. Miller 7043d6acfa7SJamal Hadi Salim if ((mark & x->mark.m) != x->mark.v) 7053d6acfa7SJamal Hadi Salim continue; 706edcd5821SDavid S. Miller xfrm_state_hold(x); 707edcd5821SDavid S. Miller return x; 708edcd5821SDavid S. Miller } 709edcd5821SDavid S. Miller 710edcd5821SDavid S. Miller return NULL; 711edcd5821SDavid S. Miller } 712edcd5821SDavid S. Miller 7139aa60088SDavid S. Miller static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, 7149aa60088SDavid S. Miller const xfrm_address_t *daddr, 7159aa60088SDavid S. Miller const xfrm_address_t *saddr, 7169aa60088SDavid S. Miller u8 proto, unsigned short family) 717edcd5821SDavid S. Miller { 718221df1edSAlexey Dobriyan unsigned int h = xfrm_src_hash(net, daddr, saddr, family); 719edcd5821SDavid S. Miller struct xfrm_state *x; 7208f126e37SDavid S. Miller struct hlist_node *entry; 721edcd5821SDavid S. Miller 722221df1edSAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) { 723edcd5821SDavid S. Miller if (x->props.family != family || 7241802571bSWei Yongjun x->id.proto != proto || 7251802571bSWei Yongjun xfrm_addr_cmp(&x->id.daddr, daddr, family) || 7261802571bSWei Yongjun xfrm_addr_cmp(&x->props.saddr, saddr, family)) 727edcd5821SDavid S. Miller continue; 728edcd5821SDavid S. Miller 7293d6acfa7SJamal Hadi Salim if ((mark & x->mark.m) != x->mark.v) 7303d6acfa7SJamal Hadi Salim continue; 731edcd5821SDavid S. Miller xfrm_state_hold(x); 732edcd5821SDavid S. Miller return x; 733edcd5821SDavid S. Miller } 734edcd5821SDavid S. Miller 735edcd5821SDavid S. Miller return NULL; 736edcd5821SDavid S. Miller } 737edcd5821SDavid S. Miller 738edcd5821SDavid S. Miller static inline struct xfrm_state * 739edcd5821SDavid S. Miller __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) 740edcd5821SDavid S. Miller { 741221df1edSAlexey Dobriyan struct net *net = xs_net(x); 742bd55775cSJamal Hadi Salim u32 mark = x->mark.v & x->mark.m; 743221df1edSAlexey Dobriyan 744edcd5821SDavid S. Miller if (use_spi) 745bd55775cSJamal Hadi Salim return __xfrm_state_lookup(net, mark, &x->id.daddr, 746bd55775cSJamal Hadi Salim x->id.spi, x->id.proto, family); 747edcd5821SDavid S. Miller else 748bd55775cSJamal Hadi Salim return __xfrm_state_lookup_byaddr(net, mark, 749bd55775cSJamal Hadi Salim &x->id.daddr, 750edcd5821SDavid S. Miller &x->props.saddr, 751edcd5821SDavid S. Miller x->id.proto, family); 752edcd5821SDavid S. Miller } 753edcd5821SDavid S. Miller 75498806f75SAlexey Dobriyan static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) 7552fab22f2SPatrick McHardy { 7562fab22f2SPatrick McHardy if (have_hash_collision && 75798806f75SAlexey Dobriyan (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && 75898806f75SAlexey Dobriyan net->xfrm.state_num > net->xfrm.state_hmask) 75998806f75SAlexey Dobriyan schedule_work(&net->xfrm.state_hash_work); 7602fab22f2SPatrick McHardy } 7612fab22f2SPatrick McHardy 76208ec9af1SDavid S. Miller static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, 7634a08ab0fSDavid S. Miller const struct flowi *fl, unsigned short family, 76408ec9af1SDavid S. Miller struct xfrm_state **best, int *acq_in_progress, 76508ec9af1SDavid S. Miller int *error) 76608ec9af1SDavid S. Miller { 76708ec9af1SDavid S. Miller /* Resolution logic: 76808ec9af1SDavid S. Miller * 1. There is a valid state with matching selector. Done. 76908ec9af1SDavid S. Miller * 2. Valid state with inappropriate selector. Skip. 77008ec9af1SDavid S. Miller * 77108ec9af1SDavid S. Miller * Entering area of "sysdeps". 77208ec9af1SDavid S. Miller * 77308ec9af1SDavid S. Miller * 3. If state is not valid, selector is temporary, it selects 77408ec9af1SDavid S. Miller * only session which triggered previous resolution. Key 77508ec9af1SDavid S. Miller * manager will do something to install a state with proper 77608ec9af1SDavid S. Miller * selector. 77708ec9af1SDavid S. Miller */ 77808ec9af1SDavid S. Miller if (x->km.state == XFRM_STATE_VALID) { 77908ec9af1SDavid S. Miller if ((x->sel.family && 78008ec9af1SDavid S. Miller !xfrm_selector_match(&x->sel, fl, x->sel.family)) || 78108ec9af1SDavid S. Miller !security_xfrm_state_pol_flow_match(x, pol, fl)) 78208ec9af1SDavid S. Miller return; 78308ec9af1SDavid S. Miller 78408ec9af1SDavid S. Miller if (!*best || 78508ec9af1SDavid S. Miller (*best)->km.dying > x->km.dying || 78608ec9af1SDavid S. Miller ((*best)->km.dying == x->km.dying && 78708ec9af1SDavid S. Miller (*best)->curlft.add_time < x->curlft.add_time)) 78808ec9af1SDavid S. Miller *best = x; 78908ec9af1SDavid S. Miller } else if (x->km.state == XFRM_STATE_ACQ) { 79008ec9af1SDavid S. Miller *acq_in_progress = 1; 79108ec9af1SDavid S. Miller } else if (x->km.state == XFRM_STATE_ERROR || 79208ec9af1SDavid S. Miller x->km.state == XFRM_STATE_EXPIRED) { 79308ec9af1SDavid S. Miller if (xfrm_selector_match(&x->sel, fl, x->sel.family) && 79408ec9af1SDavid S. Miller security_xfrm_state_pol_flow_match(x, pol, fl)) 79508ec9af1SDavid S. Miller *error = -ESRCH; 79608ec9af1SDavid S. Miller } 79708ec9af1SDavid S. Miller } 79808ec9af1SDavid S. Miller 7991da177e4SLinus Torvalds struct xfrm_state * 80033765d06SDavid S. Miller xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, 801b520e9f6SDavid S. Miller const struct flowi *fl, struct xfrm_tmpl *tmpl, 8021da177e4SLinus Torvalds struct xfrm_policy *pol, int *err, 8031da177e4SLinus Torvalds unsigned short family) 8041da177e4SLinus Torvalds { 80508ec9af1SDavid S. Miller static xfrm_address_t saddr_wildcard = { }; 8065447c5e4SAlexey Dobriyan struct net *net = xp_net(pol); 8076a783c90SNicolas Dichtel unsigned int h, h_wildcard; 8088f126e37SDavid S. Miller struct hlist_node *entry; 80937b08e34SDavid S. Miller struct xfrm_state *x, *x0, *to_put; 8101da177e4SLinus Torvalds int acquire_in_progress = 0; 8111da177e4SLinus Torvalds int error = 0; 8121da177e4SLinus Torvalds struct xfrm_state *best = NULL; 813bd55775cSJamal Hadi Salim u32 mark = pol->mark.v & pol->mark.m; 8148444cf71SThomas Egerer unsigned short encap_family = tmpl->encap_family; 8151da177e4SLinus Torvalds 81637b08e34SDavid S. Miller to_put = NULL; 81737b08e34SDavid S. Miller 8181da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 8198444cf71SThomas Egerer h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); 8205447c5e4SAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { 8218444cf71SThomas Egerer if (x->props.family == encap_family && 8221da177e4SLinus Torvalds x->props.reqid == tmpl->reqid && 8233d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 824fbd9a5b4SMasahide NAKAMURA !(x->props.flags & XFRM_STATE_WILDRECV) && 8258444cf71SThomas Egerer xfrm_state_addr_check(x, daddr, saddr, encap_family) && 8261da177e4SLinus Torvalds tmpl->mode == x->props.mode && 8271da177e4SLinus Torvalds tmpl->id.proto == x->id.proto && 82808ec9af1SDavid S. Miller (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) 8291f673c5fSDavid S. Miller xfrm_state_look_at(pol, x, fl, encap_family, 83008ec9af1SDavid S. Miller &best, &acquire_in_progress, &error); 8311da177e4SLinus Torvalds } 83208ec9af1SDavid S. Miller if (best) 83308ec9af1SDavid S. Miller goto found; 83408ec9af1SDavid S. Miller 8358444cf71SThomas Egerer h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); 8366a783c90SNicolas Dichtel hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) { 8378444cf71SThomas Egerer if (x->props.family == encap_family && 83808ec9af1SDavid S. Miller x->props.reqid == tmpl->reqid && 8393d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 84008ec9af1SDavid S. Miller !(x->props.flags & XFRM_STATE_WILDRECV) && 8418444cf71SThomas Egerer xfrm_state_addr_check(x, daddr, saddr, encap_family) && 84208ec9af1SDavid S. Miller tmpl->mode == x->props.mode && 84308ec9af1SDavid S. Miller tmpl->id.proto == x->id.proto && 84408ec9af1SDavid S. Miller (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) 8451f673c5fSDavid S. Miller xfrm_state_look_at(pol, x, fl, encap_family, 84608ec9af1SDavid S. Miller &best, &acquire_in_progress, &error); 8471da177e4SLinus Torvalds } 8481da177e4SLinus Torvalds 84908ec9af1SDavid S. Miller found: 8501da177e4SLinus Torvalds x = best; 8511da177e4SLinus Torvalds if (!x && !error && !acquire_in_progress) { 8525c5d281aSPatrick McHardy if (tmpl->id.spi && 853bd55775cSJamal Hadi Salim (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, 8548444cf71SThomas Egerer tmpl->id.proto, encap_family)) != NULL) { 85537b08e34SDavid S. Miller to_put = x0; 8561da177e4SLinus Torvalds error = -EEXIST; 8571da177e4SLinus Torvalds goto out; 8581da177e4SLinus Torvalds } 8595447c5e4SAlexey Dobriyan x = xfrm_state_alloc(net); 8601da177e4SLinus Torvalds if (x == NULL) { 8611da177e4SLinus Torvalds error = -ENOMEM; 8621da177e4SLinus Torvalds goto out; 8631da177e4SLinus Torvalds } 8648444cf71SThomas Egerer /* Initialize temporary state matching only 8651da177e4SLinus Torvalds * to current session. */ 8668444cf71SThomas Egerer xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); 867bd55775cSJamal Hadi Salim memcpy(&x->mark, &pol->mark, sizeof(x->mark)); 8681da177e4SLinus Torvalds 8691d28f42cSDavid S. Miller error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); 870e0d1caa7SVenkat Yekkirala if (error) { 871e0d1caa7SVenkat Yekkirala x->km.state = XFRM_STATE_DEAD; 87237b08e34SDavid S. Miller to_put = x; 873e0d1caa7SVenkat Yekkirala x = NULL; 874e0d1caa7SVenkat Yekkirala goto out; 875e0d1caa7SVenkat Yekkirala } 876e0d1caa7SVenkat Yekkirala 8771da177e4SLinus Torvalds if (km_query(x, tmpl, pol) == 0) { 8781da177e4SLinus Torvalds x->km.state = XFRM_STATE_ACQ; 8795447c5e4SAlexey Dobriyan list_add(&x->km.all, &net->xfrm.state_all); 8805447c5e4SAlexey Dobriyan hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); 8818444cf71SThomas Egerer h = xfrm_src_hash(net, daddr, saddr, encap_family); 8825447c5e4SAlexey Dobriyan hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); 8831da177e4SLinus Torvalds if (x->id.spi) { 8848444cf71SThomas Egerer h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); 8855447c5e4SAlexey Dobriyan hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); 8861da177e4SLinus Torvalds } 887b27aeadbSAlexey Dobriyan x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; 8889e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); 8895447c5e4SAlexey Dobriyan net->xfrm.state_num++; 8905447c5e4SAlexey Dobriyan xfrm_hash_grow_check(net, x->bydst.next != NULL); 8911da177e4SLinus Torvalds } else { 8921da177e4SLinus Torvalds x->km.state = XFRM_STATE_DEAD; 89337b08e34SDavid S. Miller to_put = x; 8941da177e4SLinus Torvalds x = NULL; 8951da177e4SLinus Torvalds error = -ESRCH; 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds } 8981da177e4SLinus Torvalds out: 8991da177e4SLinus Torvalds if (x) 9001da177e4SLinus Torvalds xfrm_state_hold(x); 9011da177e4SLinus Torvalds else 9021da177e4SLinus Torvalds *err = acquire_in_progress ? -EAGAIN : error; 9031da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 90437b08e34SDavid S. Miller if (to_put) 90537b08e34SDavid S. Miller xfrm_state_put(to_put); 9061da177e4SLinus Torvalds return x; 9071da177e4SLinus Torvalds } 9081da177e4SLinus Torvalds 909628529b6SJamal Hadi Salim struct xfrm_state * 910bd55775cSJamal Hadi Salim xfrm_stateonly_find(struct net *net, u32 mark, 9115447c5e4SAlexey Dobriyan xfrm_address_t *daddr, xfrm_address_t *saddr, 912628529b6SJamal Hadi Salim unsigned short family, u8 mode, u8 proto, u32 reqid) 913628529b6SJamal Hadi Salim { 9144bda4f25SPavel Emelyanov unsigned int h; 915628529b6SJamal Hadi Salim struct xfrm_state *rx = NULL, *x = NULL; 916628529b6SJamal Hadi Salim struct hlist_node *entry; 917628529b6SJamal Hadi Salim 918628529b6SJamal Hadi Salim spin_lock(&xfrm_state_lock); 9195447c5e4SAlexey Dobriyan h = xfrm_dst_hash(net, daddr, saddr, reqid, family); 9205447c5e4SAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { 921628529b6SJamal Hadi Salim if (x->props.family == family && 922628529b6SJamal Hadi Salim x->props.reqid == reqid && 9233d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 924628529b6SJamal Hadi Salim !(x->props.flags & XFRM_STATE_WILDRECV) && 925628529b6SJamal Hadi Salim xfrm_state_addr_check(x, daddr, saddr, family) && 926628529b6SJamal Hadi Salim mode == x->props.mode && 927628529b6SJamal Hadi Salim proto == x->id.proto && 928628529b6SJamal Hadi Salim x->km.state == XFRM_STATE_VALID) { 929628529b6SJamal Hadi Salim rx = x; 930628529b6SJamal Hadi Salim break; 931628529b6SJamal Hadi Salim } 932628529b6SJamal Hadi Salim } 933628529b6SJamal Hadi Salim 934628529b6SJamal Hadi Salim if (rx) 935628529b6SJamal Hadi Salim xfrm_state_hold(rx); 936628529b6SJamal Hadi Salim spin_unlock(&xfrm_state_lock); 937628529b6SJamal Hadi Salim 938628529b6SJamal Hadi Salim 939628529b6SJamal Hadi Salim return rx; 940628529b6SJamal Hadi Salim } 941628529b6SJamal Hadi Salim EXPORT_SYMBOL(xfrm_stateonly_find); 942628529b6SJamal Hadi Salim 9431da177e4SLinus Torvalds static void __xfrm_state_insert(struct xfrm_state *x) 9441da177e4SLinus Torvalds { 94598806f75SAlexey Dobriyan struct net *net = xs_net(x); 946a624c108SDavid S. Miller unsigned int h; 9471da177e4SLinus Torvalds 94898806f75SAlexey Dobriyan list_add(&x->km.all, &net->xfrm.state_all); 9494c563f76STimo Teras 95098806f75SAlexey Dobriyan h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, 951c1969f29SDavid S. Miller x->props.reqid, x->props.family); 95298806f75SAlexey Dobriyan hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); 9531da177e4SLinus Torvalds 95498806f75SAlexey Dobriyan h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); 95598806f75SAlexey Dobriyan hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); 9566c44e6b7SMasahide NAKAMURA 9577b4dc360SMasahide NAKAMURA if (x->id.spi) { 95898806f75SAlexey Dobriyan h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, 9596c44e6b7SMasahide NAKAMURA x->props.family); 9601da177e4SLinus Torvalds 96198806f75SAlexey Dobriyan hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); 9626c44e6b7SMasahide NAKAMURA } 9631da177e4SLinus Torvalds 9649e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); 965a47f0ce0SDavid S. Miller if (x->replay_maxage) 966a47f0ce0SDavid S. Miller mod_timer(&x->rtimer, jiffies + x->replay_maxage); 967f8cd5488SJamal Hadi Salim 96898806f75SAlexey Dobriyan wake_up(&net->xfrm.km_waitq); 969f034b5d4SDavid S. Miller 97098806f75SAlexey Dobriyan net->xfrm.state_num++; 971f034b5d4SDavid S. Miller 97298806f75SAlexey Dobriyan xfrm_hash_grow_check(net, x->bydst.next != NULL); 9731da177e4SLinus Torvalds } 9741da177e4SLinus Torvalds 975c7f5ea3aSDavid S. Miller /* xfrm_state_lock is held */ 976c7f5ea3aSDavid S. Miller static void __xfrm_state_bump_genids(struct xfrm_state *xnew) 977c7f5ea3aSDavid S. Miller { 97898806f75SAlexey Dobriyan struct net *net = xs_net(xnew); 979c7f5ea3aSDavid S. Miller unsigned short family = xnew->props.family; 980c7f5ea3aSDavid S. Miller u32 reqid = xnew->props.reqid; 981c7f5ea3aSDavid S. Miller struct xfrm_state *x; 982c7f5ea3aSDavid S. Miller struct hlist_node *entry; 983c7f5ea3aSDavid S. Miller unsigned int h; 9843d6acfa7SJamal Hadi Salim u32 mark = xnew->mark.v & xnew->mark.m; 985c7f5ea3aSDavid S. Miller 98698806f75SAlexey Dobriyan h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); 98798806f75SAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { 988c7f5ea3aSDavid S. Miller if (x->props.family == family && 989c7f5ea3aSDavid S. Miller x->props.reqid == reqid && 9903d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 991c1969f29SDavid S. Miller !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && 992c1969f29SDavid S. Miller !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) 99334996cb9SHerbert Xu x->genid++; 994c7f5ea3aSDavid S. Miller } 995c7f5ea3aSDavid S. Miller } 996c7f5ea3aSDavid S. Miller 9971da177e4SLinus Torvalds void xfrm_state_insert(struct xfrm_state *x) 9981da177e4SLinus Torvalds { 9991da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 1000c7f5ea3aSDavid S. Miller __xfrm_state_bump_genids(x); 10011da177e4SLinus Torvalds __xfrm_state_insert(x); 10021da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_insert); 10051da177e4SLinus Torvalds 10062770834cSDavid S. Miller /* xfrm_state_lock is held */ 1007a70486f0SDavid S. Miller static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m, 1008a70486f0SDavid S. Miller unsigned short family, u8 mode, 1009a70486f0SDavid S. Miller u32 reqid, u8 proto, 1010a70486f0SDavid S. Miller const xfrm_address_t *daddr, 1011a70486f0SDavid S. Miller const xfrm_address_t *saddr, int create) 10122770834cSDavid S. Miller { 10135447c5e4SAlexey Dobriyan unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); 10148f126e37SDavid S. Miller struct hlist_node *entry; 10152770834cSDavid S. Miller struct xfrm_state *x; 10163d6acfa7SJamal Hadi Salim u32 mark = m->v & m->m; 10172770834cSDavid S. Miller 10185447c5e4SAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { 10192770834cSDavid S. Miller if (x->props.reqid != reqid || 10202770834cSDavid S. Miller x->props.mode != mode || 10212770834cSDavid S. Miller x->props.family != family || 10222770834cSDavid S. Miller x->km.state != XFRM_STATE_ACQ || 102375e252d9SJoy Latten x->id.spi != 0 || 10241802571bSWei Yongjun x->id.proto != proto || 10253d6acfa7SJamal Hadi Salim (mark & x->mark.m) != x->mark.v || 10261802571bSWei Yongjun xfrm_addr_cmp(&x->id.daddr, daddr, family) || 10271802571bSWei Yongjun xfrm_addr_cmp(&x->props.saddr, saddr, family)) 10282770834cSDavid S. Miller continue; 10292770834cSDavid S. Miller 10302770834cSDavid S. Miller xfrm_state_hold(x); 10312770834cSDavid S. Miller return x; 10322770834cSDavid S. Miller } 10332770834cSDavid S. Miller 10342770834cSDavid S. Miller if (!create) 10352770834cSDavid S. Miller return NULL; 10362770834cSDavid S. Miller 10375447c5e4SAlexey Dobriyan x = xfrm_state_alloc(net); 10382770834cSDavid S. Miller if (likely(x)) { 10392770834cSDavid S. Miller switch (family) { 10402770834cSDavid S. Miller case AF_INET: 10412770834cSDavid S. Miller x->sel.daddr.a4 = daddr->a4; 10422770834cSDavid S. Miller x->sel.saddr.a4 = saddr->a4; 10432770834cSDavid S. Miller x->sel.prefixlen_d = 32; 10442770834cSDavid S. Miller x->sel.prefixlen_s = 32; 10452770834cSDavid S. Miller x->props.saddr.a4 = saddr->a4; 10462770834cSDavid S. Miller x->id.daddr.a4 = daddr->a4; 10472770834cSDavid S. Miller break; 10482770834cSDavid S. Miller 10492770834cSDavid S. Miller case AF_INET6: 10504e3fd7a0SAlexey Dobriyan *(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr; 10514e3fd7a0SAlexey Dobriyan *(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr; 10522770834cSDavid S. Miller x->sel.prefixlen_d = 128; 10532770834cSDavid S. Miller x->sel.prefixlen_s = 128; 10544e3fd7a0SAlexey Dobriyan *(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr; 10554e3fd7a0SAlexey Dobriyan *(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr; 10562770834cSDavid S. Miller break; 10573ff50b79SStephen Hemminger } 10582770834cSDavid S. Miller 10592770834cSDavid S. Miller x->km.state = XFRM_STATE_ACQ; 10602770834cSDavid S. Miller x->id.proto = proto; 10612770834cSDavid S. Miller x->props.family = family; 10622770834cSDavid S. Miller x->props.mode = mode; 10632770834cSDavid S. Miller x->props.reqid = reqid; 1064bd55775cSJamal Hadi Salim x->mark.v = m->v; 1065bd55775cSJamal Hadi Salim x->mark.m = m->m; 1066b27aeadbSAlexey Dobriyan x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; 10672770834cSDavid S. Miller xfrm_state_hold(x); 10689e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); 10695447c5e4SAlexey Dobriyan list_add(&x->km.all, &net->xfrm.state_all); 10705447c5e4SAlexey Dobriyan hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); 10715447c5e4SAlexey Dobriyan h = xfrm_src_hash(net, daddr, saddr, family); 10725447c5e4SAlexey Dobriyan hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); 1073918049f0SDavid S. Miller 10745447c5e4SAlexey Dobriyan net->xfrm.state_num++; 1075918049f0SDavid S. Miller 10765447c5e4SAlexey Dobriyan xfrm_hash_grow_check(net, x->bydst.next != NULL); 10772770834cSDavid S. Miller } 10782770834cSDavid S. Miller 10792770834cSDavid S. Miller return x; 10802770834cSDavid S. Miller } 10812770834cSDavid S. Miller 1082bd55775cSJamal Hadi Salim static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); 10831da177e4SLinus Torvalds 10841da177e4SLinus Torvalds int xfrm_state_add(struct xfrm_state *x) 10851da177e4SLinus Torvalds { 10865447c5e4SAlexey Dobriyan struct net *net = xs_net(x); 108737b08e34SDavid S. Miller struct xfrm_state *x1, *to_put; 10881da177e4SLinus Torvalds int family; 10891da177e4SLinus Torvalds int err; 1090bd55775cSJamal Hadi Salim u32 mark = x->mark.v & x->mark.m; 1091eb2971b6SMasahide NAKAMURA int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); 10921da177e4SLinus Torvalds 10931da177e4SLinus Torvalds family = x->props.family; 10941da177e4SLinus Torvalds 109537b08e34SDavid S. Miller to_put = NULL; 109637b08e34SDavid S. Miller 10971da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 10981da177e4SLinus Torvalds 1099edcd5821SDavid S. Miller x1 = __xfrm_state_locate(x, use_spi, family); 11001da177e4SLinus Torvalds if (x1) { 110137b08e34SDavid S. Miller to_put = x1; 11021da177e4SLinus Torvalds x1 = NULL; 11031da177e4SLinus Torvalds err = -EEXIST; 11041da177e4SLinus Torvalds goto out; 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds 1107eb2971b6SMasahide NAKAMURA if (use_spi && x->km.seq) { 1108bd55775cSJamal Hadi Salim x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); 110975e252d9SJoy Latten if (x1 && ((x1->id.proto != x->id.proto) || 111075e252d9SJoy Latten xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { 111137b08e34SDavid S. Miller to_put = x1; 11121da177e4SLinus Torvalds x1 = NULL; 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds 1116eb2971b6SMasahide NAKAMURA if (use_spi && !x1) 1117bd55775cSJamal Hadi Salim x1 = __find_acq_core(net, &x->mark, family, x->props.mode, 1118bd55775cSJamal Hadi Salim x->props.reqid, x->id.proto, 11191da177e4SLinus Torvalds &x->id.daddr, &x->props.saddr, 0); 11201da177e4SLinus Torvalds 1121c7f5ea3aSDavid S. Miller __xfrm_state_bump_genids(x); 11221da177e4SLinus Torvalds __xfrm_state_insert(x); 11231da177e4SLinus Torvalds err = 0; 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds out: 11261da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds if (x1) { 11291da177e4SLinus Torvalds xfrm_state_delete(x1); 11301da177e4SLinus Torvalds xfrm_state_put(x1); 11311da177e4SLinus Torvalds } 11321da177e4SLinus Torvalds 113337b08e34SDavid S. Miller if (to_put) 113437b08e34SDavid S. Miller xfrm_state_put(to_put); 113537b08e34SDavid S. Miller 11361da177e4SLinus Torvalds return err; 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_add); 11391da177e4SLinus Torvalds 114080c9abaaSShinta Sugimoto #ifdef CONFIG_XFRM_MIGRATE 11416666351dSEric Dumazet static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) 114280c9abaaSShinta Sugimoto { 114398806f75SAlexey Dobriyan struct net *net = xs_net(orig); 114480c9abaaSShinta Sugimoto int err = -ENOMEM; 114598806f75SAlexey Dobriyan struct xfrm_state *x = xfrm_state_alloc(net); 114680c9abaaSShinta Sugimoto if (!x) 1147553f9118SHerbert Xu goto out; 114880c9abaaSShinta Sugimoto 114980c9abaaSShinta Sugimoto memcpy(&x->id, &orig->id, sizeof(x->id)); 115080c9abaaSShinta Sugimoto memcpy(&x->sel, &orig->sel, sizeof(x->sel)); 115180c9abaaSShinta Sugimoto memcpy(&x->lft, &orig->lft, sizeof(x->lft)); 115280c9abaaSShinta Sugimoto x->props.mode = orig->props.mode; 115380c9abaaSShinta Sugimoto x->props.replay_window = orig->props.replay_window; 115480c9abaaSShinta Sugimoto x->props.reqid = orig->props.reqid; 115580c9abaaSShinta Sugimoto x->props.family = orig->props.family; 115680c9abaaSShinta Sugimoto x->props.saddr = orig->props.saddr; 115780c9abaaSShinta Sugimoto 115880c9abaaSShinta Sugimoto if (orig->aalg) { 11594447bb33SMartin Willi x->aalg = xfrm_algo_auth_clone(orig->aalg); 116080c9abaaSShinta Sugimoto if (!x->aalg) 116180c9abaaSShinta Sugimoto goto error; 116280c9abaaSShinta Sugimoto } 116380c9abaaSShinta Sugimoto x->props.aalgo = orig->props.aalgo; 116480c9abaaSShinta Sugimoto 116580c9abaaSShinta Sugimoto if (orig->ealg) { 116680c9abaaSShinta Sugimoto x->ealg = xfrm_algo_clone(orig->ealg); 116780c9abaaSShinta Sugimoto if (!x->ealg) 116880c9abaaSShinta Sugimoto goto error; 116980c9abaaSShinta Sugimoto } 117080c9abaaSShinta Sugimoto x->props.ealgo = orig->props.ealgo; 117180c9abaaSShinta Sugimoto 117280c9abaaSShinta Sugimoto if (orig->calg) { 117380c9abaaSShinta Sugimoto x->calg = xfrm_algo_clone(orig->calg); 117480c9abaaSShinta Sugimoto if (!x->calg) 117580c9abaaSShinta Sugimoto goto error; 117680c9abaaSShinta Sugimoto } 117780c9abaaSShinta Sugimoto x->props.calgo = orig->props.calgo; 117880c9abaaSShinta Sugimoto 117980c9abaaSShinta Sugimoto if (orig->encap) { 118080c9abaaSShinta Sugimoto x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); 118180c9abaaSShinta Sugimoto if (!x->encap) 118280c9abaaSShinta Sugimoto goto error; 118380c9abaaSShinta Sugimoto } 118480c9abaaSShinta Sugimoto 118580c9abaaSShinta Sugimoto if (orig->coaddr) { 118680c9abaaSShinta Sugimoto x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), 118780c9abaaSShinta Sugimoto GFP_KERNEL); 118880c9abaaSShinta Sugimoto if (!x->coaddr) 118980c9abaaSShinta Sugimoto goto error; 119080c9abaaSShinta Sugimoto } 119180c9abaaSShinta Sugimoto 1192af2f464eSSteffen Klassert if (orig->replay_esn) { 1193af2f464eSSteffen Klassert err = xfrm_replay_clone(x, orig); 1194af2f464eSSteffen Klassert if (err) 1195af2f464eSSteffen Klassert goto error; 1196af2f464eSSteffen Klassert } 1197af2f464eSSteffen Klassert 1198bd55775cSJamal Hadi Salim memcpy(&x->mark, &orig->mark, sizeof(x->mark)); 1199bd55775cSJamal Hadi Salim 120080c9abaaSShinta Sugimoto err = xfrm_init_state(x); 120180c9abaaSShinta Sugimoto if (err) 120280c9abaaSShinta Sugimoto goto error; 120380c9abaaSShinta Sugimoto 120480c9abaaSShinta Sugimoto x->props.flags = orig->props.flags; 120580c9abaaSShinta Sugimoto 120680c9abaaSShinta Sugimoto x->curlft.add_time = orig->curlft.add_time; 120780c9abaaSShinta Sugimoto x->km.state = orig->km.state; 120880c9abaaSShinta Sugimoto x->km.seq = orig->km.seq; 120980c9abaaSShinta Sugimoto 121080c9abaaSShinta Sugimoto return x; 121180c9abaaSShinta Sugimoto 121280c9abaaSShinta Sugimoto error: 1213553f9118SHerbert Xu xfrm_state_put(x); 1214553f9118SHerbert Xu out: 121580c9abaaSShinta Sugimoto if (errp) 121680c9abaaSShinta Sugimoto *errp = err; 121780c9abaaSShinta Sugimoto return NULL; 121880c9abaaSShinta Sugimoto } 121980c9abaaSShinta Sugimoto 122080c9abaaSShinta Sugimoto /* xfrm_state_lock is held */ 122180c9abaaSShinta Sugimoto struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) 122280c9abaaSShinta Sugimoto { 122380c9abaaSShinta Sugimoto unsigned int h; 122480c9abaaSShinta Sugimoto struct xfrm_state *x; 122580c9abaaSShinta Sugimoto struct hlist_node *entry; 122680c9abaaSShinta Sugimoto 122780c9abaaSShinta Sugimoto if (m->reqid) { 122864d0cd00SAlexey Dobriyan h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr, 122980c9abaaSShinta Sugimoto m->reqid, m->old_family); 123073d189dcSAlexey Dobriyan hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) { 123180c9abaaSShinta Sugimoto if (x->props.mode != m->mode || 123280c9abaaSShinta Sugimoto x->id.proto != m->proto) 123380c9abaaSShinta Sugimoto continue; 123480c9abaaSShinta Sugimoto if (m->reqid && x->props.reqid != m->reqid) 123580c9abaaSShinta Sugimoto continue; 123680c9abaaSShinta Sugimoto if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, 123780c9abaaSShinta Sugimoto m->old_family) || 123880c9abaaSShinta Sugimoto xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, 123980c9abaaSShinta Sugimoto m->old_family)) 124080c9abaaSShinta Sugimoto continue; 124180c9abaaSShinta Sugimoto xfrm_state_hold(x); 124280c9abaaSShinta Sugimoto return x; 124380c9abaaSShinta Sugimoto } 124480c9abaaSShinta Sugimoto } else { 124564d0cd00SAlexey Dobriyan h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr, 124680c9abaaSShinta Sugimoto m->old_family); 1247d320bbb3SAlexey Dobriyan hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) { 124880c9abaaSShinta Sugimoto if (x->props.mode != m->mode || 124980c9abaaSShinta Sugimoto x->id.proto != m->proto) 125080c9abaaSShinta Sugimoto continue; 125180c9abaaSShinta Sugimoto if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, 125280c9abaaSShinta Sugimoto m->old_family) || 125380c9abaaSShinta Sugimoto xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, 125480c9abaaSShinta Sugimoto m->old_family)) 125580c9abaaSShinta Sugimoto continue; 125680c9abaaSShinta Sugimoto xfrm_state_hold(x); 125780c9abaaSShinta Sugimoto return x; 125880c9abaaSShinta Sugimoto } 125980c9abaaSShinta Sugimoto } 126080c9abaaSShinta Sugimoto 126180c9abaaSShinta Sugimoto return NULL; 126280c9abaaSShinta Sugimoto } 126380c9abaaSShinta Sugimoto EXPORT_SYMBOL(xfrm_migrate_state_find); 126480c9abaaSShinta Sugimoto 126580c9abaaSShinta Sugimoto struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, 126680c9abaaSShinta Sugimoto struct xfrm_migrate *m) 126780c9abaaSShinta Sugimoto { 126880c9abaaSShinta Sugimoto struct xfrm_state *xc; 126980c9abaaSShinta Sugimoto int err; 127080c9abaaSShinta Sugimoto 127180c9abaaSShinta Sugimoto xc = xfrm_state_clone(x, &err); 127280c9abaaSShinta Sugimoto if (!xc) 127380c9abaaSShinta Sugimoto return NULL; 127480c9abaaSShinta Sugimoto 127580c9abaaSShinta Sugimoto memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); 127680c9abaaSShinta Sugimoto memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); 127780c9abaaSShinta Sugimoto 127880c9abaaSShinta Sugimoto /* add state */ 127980c9abaaSShinta Sugimoto if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { 128080c9abaaSShinta Sugimoto /* a care is needed when the destination address of the 128180c9abaaSShinta Sugimoto state is to be updated as it is a part of triplet */ 128280c9abaaSShinta Sugimoto xfrm_state_insert(xc); 128380c9abaaSShinta Sugimoto } else { 128480c9abaaSShinta Sugimoto if ((err = xfrm_state_add(xc)) < 0) 128580c9abaaSShinta Sugimoto goto error; 128680c9abaaSShinta Sugimoto } 128780c9abaaSShinta Sugimoto 128880c9abaaSShinta Sugimoto return xc; 128980c9abaaSShinta Sugimoto error: 129078347c8cSThomas Egerer xfrm_state_put(xc); 129180c9abaaSShinta Sugimoto return NULL; 129280c9abaaSShinta Sugimoto } 129380c9abaaSShinta Sugimoto EXPORT_SYMBOL(xfrm_state_migrate); 129480c9abaaSShinta Sugimoto #endif 129580c9abaaSShinta Sugimoto 12961da177e4SLinus Torvalds int xfrm_state_update(struct xfrm_state *x) 12971da177e4SLinus Torvalds { 129837b08e34SDavid S. Miller struct xfrm_state *x1, *to_put; 12991da177e4SLinus Torvalds int err; 1300eb2971b6SMasahide NAKAMURA int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); 13011da177e4SLinus Torvalds 130237b08e34SDavid S. Miller to_put = NULL; 130337b08e34SDavid S. Miller 13041da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 1305edcd5821SDavid S. Miller x1 = __xfrm_state_locate(x, use_spi, x->props.family); 13061da177e4SLinus Torvalds 13071da177e4SLinus Torvalds err = -ESRCH; 13081da177e4SLinus Torvalds if (!x1) 13091da177e4SLinus Torvalds goto out; 13101da177e4SLinus Torvalds 13111da177e4SLinus Torvalds if (xfrm_state_kern(x1)) { 131237b08e34SDavid S. Miller to_put = x1; 13131da177e4SLinus Torvalds err = -EEXIST; 13141da177e4SLinus Torvalds goto out; 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds if (x1->km.state == XFRM_STATE_ACQ) { 13181da177e4SLinus Torvalds __xfrm_state_insert(x); 13191da177e4SLinus Torvalds x = NULL; 13201da177e4SLinus Torvalds } 13211da177e4SLinus Torvalds err = 0; 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds out: 13241da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 13251da177e4SLinus Torvalds 132637b08e34SDavid S. Miller if (to_put) 132737b08e34SDavid S. Miller xfrm_state_put(to_put); 132837b08e34SDavid S. Miller 13291da177e4SLinus Torvalds if (err) 13301da177e4SLinus Torvalds return err; 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds if (!x) { 13331da177e4SLinus Torvalds xfrm_state_delete(x1); 13341da177e4SLinus Torvalds xfrm_state_put(x1); 13351da177e4SLinus Torvalds return 0; 13361da177e4SLinus Torvalds } 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds err = -EINVAL; 13391da177e4SLinus Torvalds spin_lock_bh(&x1->lock); 13401da177e4SLinus Torvalds if (likely(x1->km.state == XFRM_STATE_VALID)) { 13411da177e4SLinus Torvalds if (x->encap && x1->encap) 13421da177e4SLinus Torvalds memcpy(x1->encap, x->encap, sizeof(*x1->encap)); 1343060f02a3SNoriaki TAKAMIYA if (x->coaddr && x1->coaddr) { 1344060f02a3SNoriaki TAKAMIYA memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); 1345060f02a3SNoriaki TAKAMIYA } 1346060f02a3SNoriaki TAKAMIYA if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) 1347060f02a3SNoriaki TAKAMIYA memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); 13481da177e4SLinus Torvalds memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); 13491da177e4SLinus Torvalds x1->km.dying = 0; 13501da177e4SLinus Torvalds 13519e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); 13521da177e4SLinus Torvalds if (x1->curlft.use_time) 13531da177e4SLinus Torvalds xfrm_state_check_expire(x1); 13541da177e4SLinus Torvalds 13551da177e4SLinus Torvalds err = 0; 13568fcbc637STushar Gohad x->km.state = XFRM_STATE_DEAD; 13578fcbc637STushar Gohad __xfrm_state_put(x); 13581da177e4SLinus Torvalds } 13591da177e4SLinus Torvalds spin_unlock_bh(&x1->lock); 13601da177e4SLinus Torvalds 13611da177e4SLinus Torvalds xfrm_state_put(x1); 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds return err; 13641da177e4SLinus Torvalds } 13651da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_update); 13661da177e4SLinus Torvalds 13671da177e4SLinus Torvalds int xfrm_state_check_expire(struct xfrm_state *x) 13681da177e4SLinus Torvalds { 13691da177e4SLinus Torvalds if (!x->curlft.use_time) 13709d729f72SJames Morris x->curlft.use_time = get_seconds(); 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds if (x->curlft.bytes >= x->lft.hard_byte_limit || 13731da177e4SLinus Torvalds x->curlft.packets >= x->lft.hard_packet_limit) { 13744666faabSHerbert Xu x->km.state = XFRM_STATE_EXPIRED; 13759e0d57fdSYury Polyanskiy tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL); 13761da177e4SLinus Torvalds return -EINVAL; 13771da177e4SLinus Torvalds } 13781da177e4SLinus Torvalds 13791da177e4SLinus Torvalds if (!x->km.dying && 13801da177e4SLinus Torvalds (x->curlft.bytes >= x->lft.soft_byte_limit || 13814666faabSHerbert Xu x->curlft.packets >= x->lft.soft_packet_limit)) { 13824666faabSHerbert Xu x->km.dying = 1; 138353bc6b4dSJamal Hadi Salim km_state_expired(x, 0, 0); 13844666faabSHerbert Xu } 13851da177e4SLinus Torvalds return 0; 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_check_expire); 13881da177e4SLinus Torvalds 13891da177e4SLinus Torvalds struct xfrm_state * 1390a70486f0SDavid S. Miller xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, 1391bd55775cSJamal Hadi Salim u8 proto, unsigned short family) 13921da177e4SLinus Torvalds { 13931da177e4SLinus Torvalds struct xfrm_state *x; 13941da177e4SLinus Torvalds 13951da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 1396bd55775cSJamal Hadi Salim x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); 13971da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 13981da177e4SLinus Torvalds return x; 13991da177e4SLinus Torvalds } 14001da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_lookup); 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds struct xfrm_state * 1403bd55775cSJamal Hadi Salim xfrm_state_lookup_byaddr(struct net *net, u32 mark, 1404a70486f0SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 1405eb2971b6SMasahide NAKAMURA u8 proto, unsigned short family) 1406eb2971b6SMasahide NAKAMURA { 1407eb2971b6SMasahide NAKAMURA struct xfrm_state *x; 1408eb2971b6SMasahide NAKAMURA 1409eb2971b6SMasahide NAKAMURA spin_lock_bh(&xfrm_state_lock); 1410bd55775cSJamal Hadi Salim x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); 1411eb2971b6SMasahide NAKAMURA spin_unlock_bh(&xfrm_state_lock); 1412eb2971b6SMasahide NAKAMURA return x; 1413eb2971b6SMasahide NAKAMURA } 1414eb2971b6SMasahide NAKAMURA EXPORT_SYMBOL(xfrm_state_lookup_byaddr); 1415eb2971b6SMasahide NAKAMURA 1416eb2971b6SMasahide NAKAMURA struct xfrm_state * 1417bd55775cSJamal Hadi Salim xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto, 1418a70486f0SDavid S. Miller const xfrm_address_t *daddr, const xfrm_address_t *saddr, 14191da177e4SLinus Torvalds int create, unsigned short family) 14201da177e4SLinus Torvalds { 14211da177e4SLinus Torvalds struct xfrm_state *x; 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 1424bd55775cSJamal Hadi Salim x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); 14251da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 14262770834cSDavid S. Miller 14271da177e4SLinus Torvalds return x; 14281da177e4SLinus Torvalds } 14291da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_find_acq); 14301da177e4SLinus Torvalds 143141a49cc3SMasahide NAKAMURA #ifdef CONFIG_XFRM_SUB_POLICY 143241a49cc3SMasahide NAKAMURA int 143341a49cc3SMasahide NAKAMURA xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, 143441a49cc3SMasahide NAKAMURA unsigned short family) 143541a49cc3SMasahide NAKAMURA { 143641a49cc3SMasahide NAKAMURA int err = 0; 143741a49cc3SMasahide NAKAMURA struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); 143841a49cc3SMasahide NAKAMURA if (!afinfo) 143941a49cc3SMasahide NAKAMURA return -EAFNOSUPPORT; 144041a49cc3SMasahide NAKAMURA 144141a49cc3SMasahide NAKAMURA spin_lock_bh(&xfrm_state_lock); 144241a49cc3SMasahide NAKAMURA if (afinfo->tmpl_sort) 144341a49cc3SMasahide NAKAMURA err = afinfo->tmpl_sort(dst, src, n); 144441a49cc3SMasahide NAKAMURA spin_unlock_bh(&xfrm_state_lock); 144541a49cc3SMasahide NAKAMURA xfrm_state_put_afinfo(afinfo); 144641a49cc3SMasahide NAKAMURA return err; 144741a49cc3SMasahide NAKAMURA } 144841a49cc3SMasahide NAKAMURA EXPORT_SYMBOL(xfrm_tmpl_sort); 144941a49cc3SMasahide NAKAMURA 145041a49cc3SMasahide NAKAMURA int 145141a49cc3SMasahide NAKAMURA xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, 145241a49cc3SMasahide NAKAMURA unsigned short family) 145341a49cc3SMasahide NAKAMURA { 145441a49cc3SMasahide NAKAMURA int err = 0; 145541a49cc3SMasahide NAKAMURA struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); 145641a49cc3SMasahide NAKAMURA if (!afinfo) 145741a49cc3SMasahide NAKAMURA return -EAFNOSUPPORT; 145841a49cc3SMasahide NAKAMURA 145941a49cc3SMasahide NAKAMURA spin_lock_bh(&xfrm_state_lock); 146041a49cc3SMasahide NAKAMURA if (afinfo->state_sort) 146141a49cc3SMasahide NAKAMURA err = afinfo->state_sort(dst, src, n); 146241a49cc3SMasahide NAKAMURA spin_unlock_bh(&xfrm_state_lock); 146341a49cc3SMasahide NAKAMURA xfrm_state_put_afinfo(afinfo); 146441a49cc3SMasahide NAKAMURA return err; 146541a49cc3SMasahide NAKAMURA } 146641a49cc3SMasahide NAKAMURA EXPORT_SYMBOL(xfrm_state_sort); 146741a49cc3SMasahide NAKAMURA #endif 146841a49cc3SMasahide NAKAMURA 14691da177e4SLinus Torvalds /* Silly enough, but I'm lazy to build resolution list */ 14701da177e4SLinus Torvalds 1471bd55775cSJamal Hadi Salim static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) 14721da177e4SLinus Torvalds { 14731da177e4SLinus Torvalds int i; 14741da177e4SLinus Torvalds 14755447c5e4SAlexey Dobriyan for (i = 0; i <= net->xfrm.state_hmask; i++) { 14768f126e37SDavid S. Miller struct hlist_node *entry; 14778f126e37SDavid S. Miller struct xfrm_state *x; 14788f126e37SDavid S. Miller 14795447c5e4SAlexey Dobriyan hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { 14808f126e37SDavid S. Miller if (x->km.seq == seq && 14813d6acfa7SJamal Hadi Salim (mark & x->mark.m) == x->mark.v && 14828f126e37SDavid S. Miller x->km.state == XFRM_STATE_ACQ) { 14831da177e4SLinus Torvalds xfrm_state_hold(x); 14841da177e4SLinus Torvalds return x; 14851da177e4SLinus Torvalds } 14861da177e4SLinus Torvalds } 14871da177e4SLinus Torvalds } 14881da177e4SLinus Torvalds return NULL; 14891da177e4SLinus Torvalds } 14901da177e4SLinus Torvalds 1491bd55775cSJamal Hadi Salim struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) 14921da177e4SLinus Torvalds { 14931da177e4SLinus Torvalds struct xfrm_state *x; 14941da177e4SLinus Torvalds 14951da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 1496bd55775cSJamal Hadi Salim x = __xfrm_find_acq_byseq(net, mark, seq); 14971da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 14981da177e4SLinus Torvalds return x; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_find_acq_byseq); 15011da177e4SLinus Torvalds 15021da177e4SLinus Torvalds u32 xfrm_get_acqseq(void) 15031da177e4SLinus Torvalds { 15041da177e4SLinus Torvalds u32 res; 15056836b9bdSjamal static atomic_t acqseq; 15061da177e4SLinus Torvalds 15076836b9bdSjamal do { 15086836b9bdSjamal res = atomic_inc_return(&acqseq); 15096836b9bdSjamal } while (!res); 15106836b9bdSjamal 15111da177e4SLinus Torvalds return res; 15121da177e4SLinus Torvalds } 15131da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_get_acqseq); 15141da177e4SLinus Torvalds 1515658b219eSHerbert Xu int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) 15161da177e4SLinus Torvalds { 1517221df1edSAlexey Dobriyan struct net *net = xs_net(x); 1518f034b5d4SDavid S. Miller unsigned int h; 15191da177e4SLinus Torvalds struct xfrm_state *x0; 1520658b219eSHerbert Xu int err = -ENOENT; 1521658b219eSHerbert Xu __be32 minspi = htonl(low); 1522658b219eSHerbert Xu __be32 maxspi = htonl(high); 1523bd55775cSJamal Hadi Salim u32 mark = x->mark.v & x->mark.m; 15241da177e4SLinus Torvalds 1525658b219eSHerbert Xu spin_lock_bh(&x->lock); 1526658b219eSHerbert Xu if (x->km.state == XFRM_STATE_DEAD) 1527658b219eSHerbert Xu goto unlock; 1528658b219eSHerbert Xu 1529658b219eSHerbert Xu err = 0; 15301da177e4SLinus Torvalds if (x->id.spi) 1531658b219eSHerbert Xu goto unlock; 1532658b219eSHerbert Xu 1533658b219eSHerbert Xu err = -ENOENT; 15341da177e4SLinus Torvalds 15351da177e4SLinus Torvalds if (minspi == maxspi) { 1536bd55775cSJamal Hadi Salim x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); 15371da177e4SLinus Torvalds if (x0) { 15381da177e4SLinus Torvalds xfrm_state_put(x0); 1539658b219eSHerbert Xu goto unlock; 15401da177e4SLinus Torvalds } 15411da177e4SLinus Torvalds x->id.spi = minspi; 15421da177e4SLinus Torvalds } else { 15431da177e4SLinus Torvalds u32 spi = 0; 154426977b4eSAl Viro for (h=0; h<high-low+1; h++) { 154526977b4eSAl Viro spi = low + net_random()%(high-low+1); 1546bd55775cSJamal Hadi Salim x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); 15471da177e4SLinus Torvalds if (x0 == NULL) { 15481da177e4SLinus Torvalds x->id.spi = htonl(spi); 15491da177e4SLinus Torvalds break; 15501da177e4SLinus Torvalds } 15511da177e4SLinus Torvalds xfrm_state_put(x0); 15521da177e4SLinus Torvalds } 15531da177e4SLinus Torvalds } 15541da177e4SLinus Torvalds if (x->id.spi) { 15551da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 155612604d8aSAlexey Dobriyan h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); 155712604d8aSAlexey Dobriyan hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); 15581da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 1559658b219eSHerbert Xu 1560658b219eSHerbert Xu err = 0; 15611da177e4SLinus Torvalds } 1562658b219eSHerbert Xu 1563658b219eSHerbert Xu unlock: 1564658b219eSHerbert Xu spin_unlock_bh(&x->lock); 1565658b219eSHerbert Xu 1566658b219eSHerbert Xu return err; 15671da177e4SLinus Torvalds } 15681da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_alloc_spi); 15691da177e4SLinus Torvalds 1570284fa7daSAlexey Dobriyan int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, 15714c563f76STimo Teras int (*func)(struct xfrm_state *, int, void*), 15721da177e4SLinus Torvalds void *data) 15731da177e4SLinus Torvalds { 157412a169e7SHerbert Xu struct xfrm_state *state; 157512a169e7SHerbert Xu struct xfrm_state_walk *x; 15761da177e4SLinus Torvalds int err = 0; 15771da177e4SLinus Torvalds 157812a169e7SHerbert Xu if (walk->seq != 0 && list_empty(&walk->all)) 15794c563f76STimo Teras return 0; 15804c563f76STimo Teras 15811da177e4SLinus Torvalds spin_lock_bh(&xfrm_state_lock); 158212a169e7SHerbert Xu if (list_empty(&walk->all)) 1583284fa7daSAlexey Dobriyan x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); 158412a169e7SHerbert Xu else 158512a169e7SHerbert Xu x = list_entry(&walk->all, struct xfrm_state_walk, all); 1586284fa7daSAlexey Dobriyan list_for_each_entry_from(x, &net->xfrm.state_all, all) { 158712a169e7SHerbert Xu if (x->state == XFRM_STATE_DEAD) 15884c563f76STimo Teras continue; 158912a169e7SHerbert Xu state = container_of(x, struct xfrm_state, km); 159012a169e7SHerbert Xu if (!xfrm_id_proto_match(state->id.proto, walk->proto)) 159194b9bb54SJamal Hadi Salim continue; 159212a169e7SHerbert Xu err = func(state, walk->seq, data); 15934c563f76STimo Teras if (err) { 159412a169e7SHerbert Xu list_move_tail(&walk->all, &x->all); 159594b9bb54SJamal Hadi Salim goto out; 159694b9bb54SJamal Hadi Salim } 159712a169e7SHerbert Xu walk->seq++; 15984c563f76STimo Teras } 159912a169e7SHerbert Xu if (walk->seq == 0) { 16001da177e4SLinus Torvalds err = -ENOENT; 16011da177e4SLinus Torvalds goto out; 16021da177e4SLinus Torvalds } 160312a169e7SHerbert Xu list_del_init(&walk->all); 16041da177e4SLinus Torvalds out: 16051da177e4SLinus Torvalds spin_unlock_bh(&xfrm_state_lock); 16061da177e4SLinus Torvalds return err; 16071da177e4SLinus Torvalds } 16081da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_walk); 16091da177e4SLinus Torvalds 16105c182458SHerbert Xu void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto) 16115c182458SHerbert Xu { 161212a169e7SHerbert Xu INIT_LIST_HEAD(&walk->all); 16135c182458SHerbert Xu walk->proto = proto; 161412a169e7SHerbert Xu walk->state = XFRM_STATE_DEAD; 161512a169e7SHerbert Xu walk->seq = 0; 16165c182458SHerbert Xu } 16175c182458SHerbert Xu EXPORT_SYMBOL(xfrm_state_walk_init); 16185c182458SHerbert Xu 1619abb81c4fSHerbert Xu void xfrm_state_walk_done(struct xfrm_state_walk *walk) 1620abb81c4fSHerbert Xu { 162112a169e7SHerbert Xu if (list_empty(&walk->all)) 16225c182458SHerbert Xu return; 16235c182458SHerbert Xu 162412a169e7SHerbert Xu spin_lock_bh(&xfrm_state_lock); 162512a169e7SHerbert Xu list_del(&walk->all); 16267d0b591cSChuck Ebbert spin_unlock_bh(&xfrm_state_lock); 1627abb81c4fSHerbert Xu } 1628abb81c4fSHerbert Xu EXPORT_SYMBOL(xfrm_state_walk_done); 1629abb81c4fSHerbert Xu 1630f8cd5488SJamal Hadi Salim static void xfrm_replay_timer_handler(unsigned long data) 1631f8cd5488SJamal Hadi Salim { 1632f8cd5488SJamal Hadi Salim struct xfrm_state *x = (struct xfrm_state*)data; 1633f8cd5488SJamal Hadi Salim 1634f8cd5488SJamal Hadi Salim spin_lock(&x->lock); 1635f8cd5488SJamal Hadi Salim 16362717096aSJamal Hadi Salim if (x->km.state == XFRM_STATE_VALID) { 1637a6483b79SAlexey Dobriyan if (xfrm_aevent_is_on(xs_net(x))) 16389fdc4883SSteffen Klassert x->repl->notify(x, XFRM_REPLAY_TIMEOUT); 16392717096aSJamal Hadi Salim else 16402717096aSJamal Hadi Salim x->xflags |= XFRM_TIME_DEFER; 16412717096aSJamal Hadi Salim } 1642f8cd5488SJamal Hadi Salim 1643f8cd5488SJamal Hadi Salim spin_unlock(&x->lock); 1644f8cd5488SJamal Hadi Salim } 1645f8cd5488SJamal Hadi Salim 1646df01812eSDenis Cheng static LIST_HEAD(xfrm_km_list); 16471da177e4SLinus Torvalds 1648214e005bSDavid S. Miller void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) 16491da177e4SLinus Torvalds { 16501da177e4SLinus Torvalds struct xfrm_mgr *km; 16511da177e4SLinus Torvalds 165285168c00SCong Wang rcu_read_lock(); 165385168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) 165426b15dadSJamal Hadi Salim if (km->notify_policy) 165526b15dadSJamal Hadi Salim km->notify_policy(xp, dir, c); 165685168c00SCong Wang rcu_read_unlock(); 165726b15dadSJamal Hadi Salim } 165826b15dadSJamal Hadi Salim 1659214e005bSDavid S. Miller void km_state_notify(struct xfrm_state *x, const struct km_event *c) 166026b15dadSJamal Hadi Salim { 166126b15dadSJamal Hadi Salim struct xfrm_mgr *km; 166285168c00SCong Wang rcu_read_lock(); 166385168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) 166426b15dadSJamal Hadi Salim if (km->notify) 166526b15dadSJamal Hadi Salim km->notify(x, c); 166685168c00SCong Wang rcu_read_unlock(); 166726b15dadSJamal Hadi Salim } 166826b15dadSJamal Hadi Salim 166926b15dadSJamal Hadi Salim EXPORT_SYMBOL(km_policy_notify); 167026b15dadSJamal Hadi Salim EXPORT_SYMBOL(km_state_notify); 167126b15dadSJamal Hadi Salim 167215e47304SEric W. Biederman void km_state_expired(struct xfrm_state *x, int hard, u32 portid) 167326b15dadSJamal Hadi Salim { 167498806f75SAlexey Dobriyan struct net *net = xs_net(x); 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 if (hard) 168398806f75SAlexey Dobriyan wake_up(&net->xfrm.km_waitq); 16841da177e4SLinus Torvalds } 16851da177e4SLinus Torvalds 168653bc6b4dSJamal Hadi Salim EXPORT_SYMBOL(km_state_expired); 168726b15dadSJamal Hadi Salim /* 168826b15dadSJamal Hadi Salim * We send to all registered managers regardless of failure 168926b15dadSJamal Hadi Salim * We are happy with one success 169026b15dadSJamal Hadi Salim */ 1691980ebd25SJamal Hadi Salim int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) 16921da177e4SLinus Torvalds { 169326b15dadSJamal Hadi Salim int err = -EINVAL, acqret; 16941da177e4SLinus Torvalds struct xfrm_mgr *km; 16951da177e4SLinus Torvalds 169685168c00SCong Wang rcu_read_lock(); 169785168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 169865e0736bSFan Du acqret = km->acquire(x, t, pol); 169926b15dadSJamal Hadi Salim if (!acqret) 170026b15dadSJamal Hadi Salim err = acqret; 17011da177e4SLinus Torvalds } 170285168c00SCong Wang rcu_read_unlock(); 17031da177e4SLinus Torvalds return err; 17041da177e4SLinus Torvalds } 1705980ebd25SJamal Hadi Salim EXPORT_SYMBOL(km_query); 17061da177e4SLinus Torvalds 17075d36b180SAl Viro int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) 17081da177e4SLinus Torvalds { 17091da177e4SLinus Torvalds int err = -EINVAL; 17101da177e4SLinus Torvalds struct xfrm_mgr *km; 17111da177e4SLinus Torvalds 171285168c00SCong Wang rcu_read_lock(); 171385168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 17141da177e4SLinus Torvalds if (km->new_mapping) 17151da177e4SLinus Torvalds err = km->new_mapping(x, ipaddr, sport); 17161da177e4SLinus Torvalds if (!err) 17171da177e4SLinus Torvalds break; 17181da177e4SLinus Torvalds } 171985168c00SCong Wang rcu_read_unlock(); 17201da177e4SLinus Torvalds return err; 17211da177e4SLinus Torvalds } 17221da177e4SLinus Torvalds EXPORT_SYMBOL(km_new_mapping); 17231da177e4SLinus Torvalds 172415e47304SEric W. Biederman void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 portid) 17251da177e4SLinus Torvalds { 172698806f75SAlexey Dobriyan struct net *net = xp_net(pol); 172726b15dadSJamal Hadi Salim struct km_event c; 17281da177e4SLinus Torvalds 1729bf08867fSHerbert Xu c.data.hard = hard; 173015e47304SEric W. Biederman c.portid = portid; 1731f60f6b8fSHerbert Xu c.event = XFRM_MSG_POLEXPIRE; 173226b15dadSJamal Hadi Salim km_policy_notify(pol, dir, &c); 17331da177e4SLinus Torvalds 17341da177e4SLinus Torvalds if (hard) 173598806f75SAlexey Dobriyan wake_up(&net->xfrm.km_waitq); 17361da177e4SLinus Torvalds } 1737a70fcb0bSDavid S. Miller EXPORT_SYMBOL(km_policy_expired); 17381da177e4SLinus Torvalds 17392d60abc2SEric Dumazet #ifdef CONFIG_XFRM_MIGRATE 1740183cad12SDavid S. Miller int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, 1741183cad12SDavid S. Miller const struct xfrm_migrate *m, int num_migrate, 1742183cad12SDavid S. Miller const struct xfrm_kmaddress *k) 174380c9abaaSShinta Sugimoto { 174480c9abaaSShinta Sugimoto int err = -EINVAL; 174580c9abaaSShinta Sugimoto int ret; 174680c9abaaSShinta Sugimoto struct xfrm_mgr *km; 174780c9abaaSShinta Sugimoto 174885168c00SCong Wang rcu_read_lock(); 174985168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 175080c9abaaSShinta Sugimoto if (km->migrate) { 175113c1d189SArnaud Ebalard ret = km->migrate(sel, dir, type, m, num_migrate, k); 175280c9abaaSShinta Sugimoto if (!ret) 175380c9abaaSShinta Sugimoto err = ret; 175480c9abaaSShinta Sugimoto } 175580c9abaaSShinta Sugimoto } 175685168c00SCong Wang rcu_read_unlock(); 175780c9abaaSShinta Sugimoto return err; 175880c9abaaSShinta Sugimoto } 175980c9abaaSShinta Sugimoto EXPORT_SYMBOL(km_migrate); 17602d60abc2SEric Dumazet #endif 176180c9abaaSShinta Sugimoto 1762db983c11SAlexey Dobriyan int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) 176397a64b45SMasahide NAKAMURA { 176497a64b45SMasahide NAKAMURA int err = -EINVAL; 176597a64b45SMasahide NAKAMURA int ret; 176697a64b45SMasahide NAKAMURA struct xfrm_mgr *km; 176797a64b45SMasahide NAKAMURA 176885168c00SCong Wang rcu_read_lock(); 176985168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 177097a64b45SMasahide NAKAMURA if (km->report) { 1771db983c11SAlexey Dobriyan ret = km->report(net, proto, sel, addr); 177297a64b45SMasahide NAKAMURA if (!ret) 177397a64b45SMasahide NAKAMURA err = ret; 177497a64b45SMasahide NAKAMURA } 177597a64b45SMasahide NAKAMURA } 177685168c00SCong Wang rcu_read_unlock(); 177797a64b45SMasahide NAKAMURA return err; 177897a64b45SMasahide NAKAMURA } 177997a64b45SMasahide NAKAMURA EXPORT_SYMBOL(km_report); 178097a64b45SMasahide NAKAMURA 17811da177e4SLinus Torvalds int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) 17821da177e4SLinus Torvalds { 17831da177e4SLinus Torvalds int err; 17841da177e4SLinus Torvalds u8 *data; 17851da177e4SLinus Torvalds struct xfrm_mgr *km; 17861da177e4SLinus Torvalds struct xfrm_policy *pol = NULL; 17871da177e4SLinus Torvalds 17881da177e4SLinus Torvalds if (optlen <= 0 || optlen > PAGE_SIZE) 17891da177e4SLinus Torvalds return -EMSGSIZE; 17901da177e4SLinus Torvalds 17911da177e4SLinus Torvalds data = kmalloc(optlen, GFP_KERNEL); 17921da177e4SLinus Torvalds if (!data) 17931da177e4SLinus Torvalds return -ENOMEM; 17941da177e4SLinus Torvalds 17951da177e4SLinus Torvalds err = -EFAULT; 17961da177e4SLinus Torvalds if (copy_from_user(data, optval, optlen)) 17971da177e4SLinus Torvalds goto out; 17981da177e4SLinus Torvalds 17991da177e4SLinus Torvalds err = -EINVAL; 180085168c00SCong Wang rcu_read_lock(); 180185168c00SCong Wang list_for_each_entry_rcu(km, &xfrm_km_list, list) { 1802cb969f07SVenkat Yekkirala pol = km->compile_policy(sk, optname, data, 18031da177e4SLinus Torvalds optlen, &err); 18041da177e4SLinus Torvalds if (err >= 0) 18051da177e4SLinus Torvalds break; 18061da177e4SLinus Torvalds } 180785168c00SCong Wang rcu_read_unlock(); 18081da177e4SLinus Torvalds 18091da177e4SLinus Torvalds if (err >= 0) { 18101da177e4SLinus Torvalds xfrm_sk_policy_insert(sk, err, pol); 18111da177e4SLinus Torvalds xfrm_pol_put(pol); 18121da177e4SLinus Torvalds err = 0; 18131da177e4SLinus Torvalds } 18141da177e4SLinus Torvalds 18151da177e4SLinus Torvalds out: 18161da177e4SLinus Torvalds kfree(data); 18171da177e4SLinus Torvalds return err; 18181da177e4SLinus Torvalds } 18191da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_user_policy); 18201da177e4SLinus Torvalds 182185168c00SCong Wang static DEFINE_SPINLOCK(xfrm_km_lock); 182285168c00SCong Wang 18231da177e4SLinus Torvalds int xfrm_register_km(struct xfrm_mgr *km) 18241da177e4SLinus Torvalds { 182585168c00SCong Wang spin_lock_bh(&xfrm_km_lock); 182685168c00SCong Wang list_add_tail_rcu(&km->list, &xfrm_km_list); 182785168c00SCong Wang spin_unlock_bh(&xfrm_km_lock); 18281da177e4SLinus Torvalds return 0; 18291da177e4SLinus Torvalds } 18301da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_register_km); 18311da177e4SLinus Torvalds 18321da177e4SLinus Torvalds int xfrm_unregister_km(struct xfrm_mgr *km) 18331da177e4SLinus Torvalds { 183485168c00SCong Wang spin_lock_bh(&xfrm_km_lock); 183585168c00SCong Wang list_del_rcu(&km->list); 183685168c00SCong Wang spin_unlock_bh(&xfrm_km_lock); 183785168c00SCong Wang synchronize_rcu(); 18381da177e4SLinus Torvalds return 0; 18391da177e4SLinus Torvalds } 18401da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_unregister_km); 18411da177e4SLinus Torvalds 18421da177e4SLinus Torvalds int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) 18431da177e4SLinus Torvalds { 18441da177e4SLinus Torvalds int err = 0; 18451da177e4SLinus Torvalds if (unlikely(afinfo == NULL)) 18461da177e4SLinus Torvalds return -EINVAL; 18471da177e4SLinus Torvalds if (unlikely(afinfo->family >= NPROTO)) 18481da177e4SLinus Torvalds return -EAFNOSUPPORT; 184944abdc30SCong Wang spin_lock_bh(&xfrm_state_afinfo_lock); 18501da177e4SLinus Torvalds if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) 18511da177e4SLinus Torvalds err = -ENOBUFS; 1852edcd5821SDavid S. Miller else 185344abdc30SCong Wang rcu_assign_pointer(xfrm_state_afinfo[afinfo->family], afinfo); 185444abdc30SCong Wang spin_unlock_bh(&xfrm_state_afinfo_lock); 18551da177e4SLinus Torvalds return err; 18561da177e4SLinus Torvalds } 18571da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_register_afinfo); 18581da177e4SLinus Torvalds 18591da177e4SLinus Torvalds int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) 18601da177e4SLinus Torvalds { 18611da177e4SLinus Torvalds int err = 0; 18621da177e4SLinus Torvalds if (unlikely(afinfo == NULL)) 18631da177e4SLinus Torvalds return -EINVAL; 18641da177e4SLinus Torvalds if (unlikely(afinfo->family >= NPROTO)) 18651da177e4SLinus Torvalds return -EAFNOSUPPORT; 186644abdc30SCong Wang spin_lock_bh(&xfrm_state_afinfo_lock); 18671da177e4SLinus Torvalds if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { 18681da177e4SLinus Torvalds if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) 18691da177e4SLinus Torvalds err = -EINVAL; 1870edcd5821SDavid S. Miller else 187144abdc30SCong Wang RCU_INIT_POINTER(xfrm_state_afinfo[afinfo->family], NULL); 18721da177e4SLinus Torvalds } 187344abdc30SCong Wang spin_unlock_bh(&xfrm_state_afinfo_lock); 187444abdc30SCong Wang synchronize_rcu(); 18751da177e4SLinus Torvalds return err; 18761da177e4SLinus Torvalds } 18771da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_unregister_afinfo); 18781da177e4SLinus Torvalds 187917c2a42aSHerbert Xu static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) 18801da177e4SLinus Torvalds { 18811da177e4SLinus Torvalds struct xfrm_state_afinfo *afinfo; 18821da177e4SLinus Torvalds if (unlikely(family >= NPROTO)) 18831da177e4SLinus Torvalds return NULL; 188444abdc30SCong Wang rcu_read_lock(); 188544abdc30SCong Wang afinfo = rcu_dereference(xfrm_state_afinfo[family]); 1886546be240SHerbert Xu if (unlikely(!afinfo)) 188744abdc30SCong Wang rcu_read_unlock(); 18881da177e4SLinus Torvalds return afinfo; 18891da177e4SLinus Torvalds } 18901da177e4SLinus Torvalds 189117c2a42aSHerbert Xu static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) 18921da177e4SLinus Torvalds { 189344abdc30SCong Wang rcu_read_unlock(); 18941da177e4SLinus Torvalds } 18951da177e4SLinus Torvalds 18961da177e4SLinus Torvalds /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ 18971da177e4SLinus Torvalds void xfrm_state_delete_tunnel(struct xfrm_state *x) 18981da177e4SLinus Torvalds { 18991da177e4SLinus Torvalds if (x->tunnel) { 19001da177e4SLinus Torvalds struct xfrm_state *t = x->tunnel; 19011da177e4SLinus Torvalds 19021da177e4SLinus Torvalds if (atomic_read(&t->tunnel_users) == 2) 19031da177e4SLinus Torvalds xfrm_state_delete(t); 19041da177e4SLinus Torvalds atomic_dec(&t->tunnel_users); 19051da177e4SLinus Torvalds xfrm_state_put(t); 19061da177e4SLinus Torvalds x->tunnel = NULL; 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds } 19091da177e4SLinus Torvalds EXPORT_SYMBOL(xfrm_state_delete_tunnel); 19101da177e4SLinus Torvalds 19111da177e4SLinus Torvalds int xfrm_state_mtu(struct xfrm_state *x, int mtu) 19121da177e4SLinus Torvalds { 1913c5c25238SPatrick McHardy int res; 19141da177e4SLinus Torvalds 19151da177e4SLinus Torvalds spin_lock_bh(&x->lock); 19161da177e4SLinus Torvalds if (x->km.state == XFRM_STATE_VALID && 1917c5c25238SPatrick McHardy x->type && x->type->get_mtu) 1918c5c25238SPatrick McHardy res = x->type->get_mtu(x, mtu); 19191da177e4SLinus Torvalds else 192028121617SPatrick McHardy res = mtu - x->props.header_len; 19211da177e4SLinus Torvalds spin_unlock_bh(&x->lock); 19221da177e4SLinus Torvalds return res; 19231da177e4SLinus Torvalds } 19241da177e4SLinus Torvalds 1925a454f0ccSWei Yongjun int __xfrm_init_state(struct xfrm_state *x, bool init_replay) 192672cb6962SHerbert Xu { 1927d094cd83SHerbert Xu struct xfrm_state_afinfo *afinfo; 1928df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode; 1929d094cd83SHerbert Xu int family = x->props.family; 193072cb6962SHerbert Xu int err; 193172cb6962SHerbert Xu 1932d094cd83SHerbert Xu err = -EAFNOSUPPORT; 1933d094cd83SHerbert Xu afinfo = xfrm_state_get_afinfo(family); 1934d094cd83SHerbert Xu if (!afinfo) 1935d094cd83SHerbert Xu goto error; 1936d094cd83SHerbert Xu 1937d094cd83SHerbert Xu err = 0; 1938d094cd83SHerbert Xu if (afinfo->init_flags) 1939d094cd83SHerbert Xu err = afinfo->init_flags(x); 1940d094cd83SHerbert Xu 1941d094cd83SHerbert Xu xfrm_state_put_afinfo(afinfo); 1942d094cd83SHerbert Xu 1943d094cd83SHerbert Xu if (err) 1944d094cd83SHerbert Xu goto error; 1945d094cd83SHerbert Xu 1946d094cd83SHerbert Xu err = -EPROTONOSUPPORT; 1947df9dcb45SKazunori MIYAZAWA 1948df9dcb45SKazunori MIYAZAWA if (x->sel.family != AF_UNSPEC) { 1949df9dcb45SKazunori MIYAZAWA inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); 1950df9dcb45SKazunori MIYAZAWA if (inner_mode == NULL) 195113996378SHerbert Xu goto error; 195213996378SHerbert Xu 1953df9dcb45SKazunori MIYAZAWA if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && 1954df9dcb45SKazunori MIYAZAWA family != x->sel.family) { 1955df9dcb45SKazunori MIYAZAWA xfrm_put_mode(inner_mode); 195613996378SHerbert Xu goto error; 1957df9dcb45SKazunori MIYAZAWA } 1958df9dcb45SKazunori MIYAZAWA 1959df9dcb45SKazunori MIYAZAWA x->inner_mode = inner_mode; 1960df9dcb45SKazunori MIYAZAWA } else { 1961df9dcb45SKazunori MIYAZAWA struct xfrm_mode *inner_mode_iaf; 1962d81d2285SMartin Willi int iafamily = AF_INET; 1963df9dcb45SKazunori MIYAZAWA 1964d81d2285SMartin Willi inner_mode = xfrm_get_mode(x->props.mode, x->props.family); 1965df9dcb45SKazunori MIYAZAWA if (inner_mode == NULL) 1966df9dcb45SKazunori MIYAZAWA goto error; 1967df9dcb45SKazunori MIYAZAWA 1968df9dcb45SKazunori MIYAZAWA if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { 1969df9dcb45SKazunori MIYAZAWA xfrm_put_mode(inner_mode); 1970df9dcb45SKazunori MIYAZAWA goto error; 1971df9dcb45SKazunori MIYAZAWA } 1972df9dcb45SKazunori MIYAZAWA x->inner_mode = inner_mode; 1973d81d2285SMartin Willi 1974d81d2285SMartin Willi if (x->props.family == AF_INET) 1975d81d2285SMartin Willi iafamily = AF_INET6; 1976d81d2285SMartin Willi 1977d81d2285SMartin Willi inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); 1978d81d2285SMartin Willi if (inner_mode_iaf) { 1979d81d2285SMartin Willi if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) 1980df9dcb45SKazunori MIYAZAWA x->inner_mode_iaf = inner_mode_iaf; 1981d81d2285SMartin Willi else 1982d81d2285SMartin Willi xfrm_put_mode(inner_mode_iaf); 1983df9dcb45SKazunori MIYAZAWA } 1984df9dcb45SKazunori MIYAZAWA } 198513996378SHerbert Xu 1986d094cd83SHerbert Xu x->type = xfrm_get_type(x->id.proto, family); 198772cb6962SHerbert Xu if (x->type == NULL) 198872cb6962SHerbert Xu goto error; 198972cb6962SHerbert Xu 199072cb6962SHerbert Xu err = x->type->init_state(x); 199172cb6962SHerbert Xu if (err) 199272cb6962SHerbert Xu goto error; 199372cb6962SHerbert Xu 199413996378SHerbert Xu x->outer_mode = xfrm_get_mode(x->props.mode, family); 1995599901c3SJulia Lawall if (x->outer_mode == NULL) { 1996599901c3SJulia Lawall err = -EPROTONOSUPPORT; 1997b59f45d0SHerbert Xu goto error; 1998599901c3SJulia Lawall } 1999b59f45d0SHerbert Xu 2000a454f0ccSWei Yongjun if (init_replay) { 2001a454f0ccSWei Yongjun err = xfrm_init_replay(x); 2002a454f0ccSWei Yongjun if (err) 2003a454f0ccSWei Yongjun goto error; 2004a454f0ccSWei Yongjun } 2005a454f0ccSWei Yongjun 200672cb6962SHerbert Xu x->km.state = XFRM_STATE_VALID; 200772cb6962SHerbert Xu 200872cb6962SHerbert Xu error: 200972cb6962SHerbert Xu return err; 201072cb6962SHerbert Xu } 201172cb6962SHerbert Xu 2012a454f0ccSWei Yongjun EXPORT_SYMBOL(__xfrm_init_state); 2013a454f0ccSWei Yongjun 2014a454f0ccSWei Yongjun int xfrm_init_state(struct xfrm_state *x) 2015a454f0ccSWei Yongjun { 2016a454f0ccSWei Yongjun return __xfrm_init_state(x, true); 2017a454f0ccSWei Yongjun } 2018a454f0ccSWei Yongjun 201972cb6962SHerbert Xu EXPORT_SYMBOL(xfrm_init_state); 20201da177e4SLinus Torvalds 2021d62ddc21SAlexey Dobriyan int __net_init xfrm_state_init(struct net *net) 20221da177e4SLinus Torvalds { 2023f034b5d4SDavid S. Miller unsigned int sz; 20241da177e4SLinus Torvalds 20259d4139c7SAlexey Dobriyan INIT_LIST_HEAD(&net->xfrm.state_all); 20269d4139c7SAlexey Dobriyan 2027f034b5d4SDavid S. Miller sz = sizeof(struct hlist_head) * 8; 2028f034b5d4SDavid S. Miller 202973d189dcSAlexey Dobriyan net->xfrm.state_bydst = xfrm_hash_alloc(sz); 203073d189dcSAlexey Dobriyan if (!net->xfrm.state_bydst) 203173d189dcSAlexey Dobriyan goto out_bydst; 2032d320bbb3SAlexey Dobriyan net->xfrm.state_bysrc = xfrm_hash_alloc(sz); 2033d320bbb3SAlexey Dobriyan if (!net->xfrm.state_bysrc) 2034d320bbb3SAlexey Dobriyan goto out_bysrc; 2035b754a4fdSAlexey Dobriyan net->xfrm.state_byspi = xfrm_hash_alloc(sz); 2036b754a4fdSAlexey Dobriyan if (!net->xfrm.state_byspi) 2037b754a4fdSAlexey Dobriyan goto out_byspi; 2038529983ecSAlexey Dobriyan net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); 2039f034b5d4SDavid S. Miller 20400bf7c5b0SAlexey Dobriyan net->xfrm.state_num = 0; 204163082733SAlexey Dobriyan INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); 2042b8a0ae20SAlexey Dobriyan INIT_HLIST_HEAD(&net->xfrm.state_gc_list); 2043c7837144SAlexey Dobriyan INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); 204450a30657SAlexey Dobriyan init_waitqueue_head(&net->xfrm.km_waitq); 2045d62ddc21SAlexey Dobriyan return 0; 204673d189dcSAlexey Dobriyan 2047b754a4fdSAlexey Dobriyan out_byspi: 2048b754a4fdSAlexey Dobriyan xfrm_hash_free(net->xfrm.state_bysrc, sz); 2049d320bbb3SAlexey Dobriyan out_bysrc: 2050d320bbb3SAlexey Dobriyan xfrm_hash_free(net->xfrm.state_bydst, sz); 205173d189dcSAlexey Dobriyan out_bydst: 205273d189dcSAlexey Dobriyan return -ENOMEM; 2053d62ddc21SAlexey Dobriyan } 2054d62ddc21SAlexey Dobriyan 2055d62ddc21SAlexey Dobriyan void xfrm_state_fini(struct net *net) 2056d62ddc21SAlexey Dobriyan { 20577c2776eeSAlexey Dobriyan struct xfrm_audit audit_info; 205873d189dcSAlexey Dobriyan unsigned int sz; 205973d189dcSAlexey Dobriyan 20607c2776eeSAlexey Dobriyan flush_work(&net->xfrm.state_hash_work); 2061e1760bd5SEric W. Biederman audit_info.loginuid = INVALID_UID; 20627c2776eeSAlexey Dobriyan audit_info.sessionid = -1; 20637c2776eeSAlexey Dobriyan audit_info.secid = 0; 20647c2776eeSAlexey Dobriyan xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info); 20657c2776eeSAlexey Dobriyan flush_work(&net->xfrm.state_gc_work); 20667c2776eeSAlexey Dobriyan 20679d4139c7SAlexey Dobriyan WARN_ON(!list_empty(&net->xfrm.state_all)); 206873d189dcSAlexey Dobriyan 2069529983ecSAlexey Dobriyan sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); 2070b754a4fdSAlexey Dobriyan WARN_ON(!hlist_empty(net->xfrm.state_byspi)); 2071b754a4fdSAlexey Dobriyan xfrm_hash_free(net->xfrm.state_byspi, sz); 2072d320bbb3SAlexey Dobriyan WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); 2073d320bbb3SAlexey Dobriyan xfrm_hash_free(net->xfrm.state_bysrc, sz); 207473d189dcSAlexey Dobriyan WARN_ON(!hlist_empty(net->xfrm.state_bydst)); 207573d189dcSAlexey Dobriyan xfrm_hash_free(net->xfrm.state_bydst, sz); 20761da177e4SLinus Torvalds } 20771da177e4SLinus Torvalds 2078ab5f5e8bSJoy Latten #ifdef CONFIG_AUDITSYSCALL 2079cf35f43eSIlpo Järvinen static void xfrm_audit_helper_sainfo(struct xfrm_state *x, 2080ab5f5e8bSJoy Latten struct audit_buffer *audit_buf) 2081ab5f5e8bSJoy Latten { 208268277accSPaul Moore struct xfrm_sec_ctx *ctx = x->security; 208368277accSPaul Moore u32 spi = ntohl(x->id.spi); 208468277accSPaul Moore 208568277accSPaul Moore if (ctx) 2086ab5f5e8bSJoy Latten audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", 208768277accSPaul Moore ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); 2088ab5f5e8bSJoy Latten 2089ab5f5e8bSJoy Latten switch(x->props.family) { 2090ab5f5e8bSJoy Latten case AF_INET: 209121454aaaSHarvey Harrison audit_log_format(audit_buf, " src=%pI4 dst=%pI4", 209221454aaaSHarvey Harrison &x->props.saddr.a4, &x->id.daddr.a4); 2093ab5f5e8bSJoy Latten break; 2094ab5f5e8bSJoy Latten case AF_INET6: 20955b095d98SHarvey Harrison audit_log_format(audit_buf, " src=%pI6 dst=%pI6", 2096fdb46ee7SHarvey Harrison x->props.saddr.a6, x->id.daddr.a6); 2097ab5f5e8bSJoy Latten break; 2098ab5f5e8bSJoy Latten } 209968277accSPaul Moore 210068277accSPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); 2101ab5f5e8bSJoy Latten } 2102ab5f5e8bSJoy Latten 2103cf35f43eSIlpo Järvinen static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, 2104afeb14b4SPaul Moore struct audit_buffer *audit_buf) 2105afeb14b4SPaul Moore { 2106b71d1d42SEric Dumazet const struct iphdr *iph4; 2107b71d1d42SEric Dumazet const struct ipv6hdr *iph6; 2108afeb14b4SPaul Moore 2109afeb14b4SPaul Moore switch (family) { 2110afeb14b4SPaul Moore case AF_INET: 2111afeb14b4SPaul Moore iph4 = ip_hdr(skb); 211221454aaaSHarvey Harrison audit_log_format(audit_buf, " src=%pI4 dst=%pI4", 211321454aaaSHarvey Harrison &iph4->saddr, &iph4->daddr); 2114afeb14b4SPaul Moore break; 2115afeb14b4SPaul Moore case AF_INET6: 2116afeb14b4SPaul Moore iph6 = ipv6_hdr(skb); 2117afeb14b4SPaul Moore audit_log_format(audit_buf, 21185b095d98SHarvey Harrison " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", 2119fdb46ee7SHarvey Harrison &iph6->saddr,&iph6->daddr, 2120afeb14b4SPaul Moore iph6->flow_lbl[0] & 0x0f, 2121afeb14b4SPaul Moore iph6->flow_lbl[1], 2122afeb14b4SPaul Moore iph6->flow_lbl[2]); 2123afeb14b4SPaul Moore break; 2124afeb14b4SPaul Moore } 2125afeb14b4SPaul Moore } 2126afeb14b4SPaul Moore 212768277accSPaul Moore void xfrm_audit_state_add(struct xfrm_state *x, int result, 2128e1760bd5SEric W. Biederman kuid_t auid, u32 sessionid, u32 secid) 2129ab5f5e8bSJoy Latten { 2130ab5f5e8bSJoy Latten struct audit_buffer *audit_buf; 2131ab5f5e8bSJoy Latten 2132afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SAD-add"); 2133ab5f5e8bSJoy Latten if (audit_buf == NULL) 2134ab5f5e8bSJoy Latten return; 21352532386fSEric Paris xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); 2136afeb14b4SPaul Moore xfrm_audit_helper_sainfo(x, audit_buf); 2137afeb14b4SPaul Moore audit_log_format(audit_buf, " res=%u", result); 2138ab5f5e8bSJoy Latten audit_log_end(audit_buf); 2139ab5f5e8bSJoy Latten } 2140ab5f5e8bSJoy Latten EXPORT_SYMBOL_GPL(xfrm_audit_state_add); 2141ab5f5e8bSJoy Latten 214268277accSPaul Moore void xfrm_audit_state_delete(struct xfrm_state *x, int result, 2143e1760bd5SEric W. Biederman kuid_t auid, u32 sessionid, u32 secid) 2144ab5f5e8bSJoy Latten { 2145ab5f5e8bSJoy Latten struct audit_buffer *audit_buf; 2146ab5f5e8bSJoy Latten 2147afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SAD-delete"); 2148ab5f5e8bSJoy Latten if (audit_buf == NULL) 2149ab5f5e8bSJoy Latten return; 21502532386fSEric Paris xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); 2151afeb14b4SPaul Moore xfrm_audit_helper_sainfo(x, audit_buf); 2152afeb14b4SPaul Moore audit_log_format(audit_buf, " res=%u", result); 2153ab5f5e8bSJoy Latten audit_log_end(audit_buf); 2154ab5f5e8bSJoy Latten } 2155ab5f5e8bSJoy Latten EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); 2156afeb14b4SPaul Moore 2157afeb14b4SPaul Moore void xfrm_audit_state_replay_overflow(struct xfrm_state *x, 2158afeb14b4SPaul Moore struct sk_buff *skb) 2159afeb14b4SPaul Moore { 2160afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2161afeb14b4SPaul Moore u32 spi; 2162afeb14b4SPaul Moore 2163afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-replay-overflow"); 2164afeb14b4SPaul Moore if (audit_buf == NULL) 2165afeb14b4SPaul Moore return; 2166afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); 2167afeb14b4SPaul Moore /* don't record the sequence number because it's inherent in this kind 2168afeb14b4SPaul Moore * of audit message */ 2169afeb14b4SPaul Moore spi = ntohl(x->id.spi); 2170afeb14b4SPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); 2171afeb14b4SPaul Moore audit_log_end(audit_buf); 2172afeb14b4SPaul Moore } 2173afeb14b4SPaul Moore EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); 2174afeb14b4SPaul Moore 21759fdc4883SSteffen Klassert void xfrm_audit_state_replay(struct xfrm_state *x, 2176afeb14b4SPaul Moore struct sk_buff *skb, __be32 net_seq) 2177afeb14b4SPaul Moore { 2178afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2179afeb14b4SPaul Moore u32 spi; 2180afeb14b4SPaul Moore 2181afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-replayed-pkt"); 2182afeb14b4SPaul Moore if (audit_buf == NULL) 2183afeb14b4SPaul Moore return; 2184afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); 2185afeb14b4SPaul Moore spi = ntohl(x->id.spi); 2186afeb14b4SPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", 2187afeb14b4SPaul Moore spi, spi, ntohl(net_seq)); 2188afeb14b4SPaul Moore audit_log_end(audit_buf); 2189afeb14b4SPaul Moore } 21909fdc4883SSteffen Klassert EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); 2191afeb14b4SPaul Moore 2192afeb14b4SPaul Moore void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) 2193afeb14b4SPaul Moore { 2194afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2195afeb14b4SPaul Moore 2196afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-notfound"); 2197afeb14b4SPaul Moore if (audit_buf == NULL) 2198afeb14b4SPaul Moore return; 2199afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, family, audit_buf); 2200afeb14b4SPaul Moore audit_log_end(audit_buf); 2201afeb14b4SPaul Moore } 2202afeb14b4SPaul Moore EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); 2203afeb14b4SPaul Moore 2204afeb14b4SPaul Moore void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, 2205afeb14b4SPaul Moore __be32 net_spi, __be32 net_seq) 2206afeb14b4SPaul Moore { 2207afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2208afeb14b4SPaul Moore u32 spi; 2209afeb14b4SPaul Moore 2210afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-notfound"); 2211afeb14b4SPaul Moore if (audit_buf == NULL) 2212afeb14b4SPaul Moore return; 2213afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, family, audit_buf); 2214afeb14b4SPaul Moore spi = ntohl(net_spi); 2215afeb14b4SPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", 2216afeb14b4SPaul Moore spi, spi, ntohl(net_seq)); 2217afeb14b4SPaul Moore audit_log_end(audit_buf); 2218afeb14b4SPaul Moore } 2219afeb14b4SPaul Moore EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); 2220afeb14b4SPaul Moore 2221afeb14b4SPaul Moore void xfrm_audit_state_icvfail(struct xfrm_state *x, 2222afeb14b4SPaul Moore struct sk_buff *skb, u8 proto) 2223afeb14b4SPaul Moore { 2224afeb14b4SPaul Moore struct audit_buffer *audit_buf; 2225afeb14b4SPaul Moore __be32 net_spi; 2226afeb14b4SPaul Moore __be32 net_seq; 2227afeb14b4SPaul Moore 2228afeb14b4SPaul Moore audit_buf = xfrm_audit_start("SA-icv-failure"); 2229afeb14b4SPaul Moore if (audit_buf == NULL) 2230afeb14b4SPaul Moore return; 2231afeb14b4SPaul Moore xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); 2232afeb14b4SPaul Moore if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { 2233afeb14b4SPaul Moore u32 spi = ntohl(net_spi); 2234afeb14b4SPaul Moore audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", 2235afeb14b4SPaul Moore spi, spi, ntohl(net_seq)); 2236afeb14b4SPaul Moore } 2237afeb14b4SPaul Moore audit_log_end(audit_buf); 2238afeb14b4SPaul Moore } 2239afeb14b4SPaul Moore EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); 2240ab5f5e8bSJoy Latten #endif /* CONFIG_AUDITSYSCALL */ 2241