1
2
3
4#ifndef _IP_SET_HASH_GEN_H
5#define _IP_SET_HASH_GEN_H
6
7#include <linux/rcupdate.h>
8#include <linux/jhash.h>
9#include <linux/types.h>
10#include <linux/netfilter/nfnetlink.h>
11#include <linux/netfilter/ipset/ip_set.h>
12
13#define __ipset_dereference(p) \
14 rcu_dereference_protected(p, 1)
15#define ipset_dereference_nfnl(p) \
16 rcu_dereference_protected(p, \
17 lockdep_nfnl_is_held(NFNL_SUBSYS_IPSET))
18#define ipset_dereference_set(p, set) \
19 rcu_dereference_protected(p, \
20 lockdep_nfnl_is_held(NFNL_SUBSYS_IPSET) || \
21 lockdep_is_held(&(set)->lock))
22#define ipset_dereference_bh_nfnl(p) \
23 rcu_dereference_bh_check(p, \
24 lockdep_nfnl_is_held(NFNL_SUBSYS_IPSET))
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40#define AHASH_INIT_SIZE 2
41
42#define AHASH_MAX_SIZE (6 * AHASH_INIT_SIZE)
43
44#define AHASH_MAX_TUNED 64
45
46#define AHASH_MAX(h) ((h)->bucketsize)
47
48
49#ifdef IP_SET_HASH_WITH_MULTI
50static u8
51tune_bucketsize(u8 curr, u32 multi)
52{
53 u32 n;
54
55 if (multi < curr)
56 return curr;
57
58 n = curr + AHASH_INIT_SIZE;
59
60
61
62 return n > curr && n <= AHASH_MAX_TUNED ? n : curr;
63}
64#define TUNE_BUCKETSIZE(h, multi) \
65 ((h)->bucketsize = tune_bucketsize((h)->bucketsize, multi))
66#else
67#define TUNE_BUCKETSIZE(h, multi)
68#endif
69
70
71struct hbucket {
72 struct rcu_head rcu;
73
74 DECLARE_BITMAP(used, AHASH_MAX_TUNED);
75 u8 size;
76 u8 pos;
77 unsigned char value[]
78 __aligned(__alignof__(u64));
79};
80
81
82#define HTABLE_REGION_BITS 10
83#define ahash_numof_locks(htable_bits) \
84 ((htable_bits) < HTABLE_REGION_BITS ? 1 \
85 : jhash_size((htable_bits) - HTABLE_REGION_BITS))
86#define ahash_sizeof_regions(htable_bits) \
87 (ahash_numof_locks(htable_bits) * sizeof(struct ip_set_region))
88#define ahash_region(n, htable_bits) \
89 ((n) % ahash_numof_locks(htable_bits))
90#define ahash_bucket_start(h, htable_bits) \
91 ((htable_bits) < HTABLE_REGION_BITS ? 0 \
92 : (h) * jhash_size(HTABLE_REGION_BITS))
93#define ahash_bucket_end(h, htable_bits) \
94 ((htable_bits) < HTABLE_REGION_BITS ? jhash_size(htable_bits) \
95 : ((h) + 1) * jhash_size(HTABLE_REGION_BITS))
96
97struct htable_gc {
98 struct delayed_work dwork;
99 struct ip_set *set;
100 u32 region;
101};
102
103
104struct htable {
105 atomic_t ref;
106 atomic_t uref;
107 u8 htable_bits;
108 u32 maxelem;
109 struct ip_set_region *hregion;
110 struct hbucket __rcu *bucket[];
111};
112
113#define hbucket(h, i) ((h)->bucket[i])
114#define ext_size(n, dsize) \
115 (sizeof(struct hbucket) + (n) * (dsize))
116
117#ifndef IPSET_NET_COUNT
118#define IPSET_NET_COUNT 1
119#endif
120
121
122struct net_prefixes {
123 u32 nets[IPSET_NET_COUNT];
124 u8 cidr[IPSET_NET_COUNT];
125};
126
127
128static size_t
129htable_size(u8 hbits)
130{
131 size_t hsize;
132
133
134 if (hbits > 31)
135 return 0;
136 hsize = jhash_size(hbits);
137 if ((INT_MAX - sizeof(struct htable)) / sizeof(struct hbucket *)
138 < hsize)
139 return 0;
140
141 return hsize * sizeof(struct hbucket *) + sizeof(struct htable);
142}
143
144#ifdef IP_SET_HASH_WITH_NETS
145#if IPSET_NET_COUNT > 1
146#define __CIDR(cidr, i) (cidr[i])
147#else
148#define __CIDR(cidr, i) (cidr)
149#endif
150
151
152#define NCIDR_PUT(cidr) ((cidr) + 1)
153#define NCIDR_GET(cidr) ((cidr) - 1)
154
155#ifdef IP_SET_HASH_WITH_NETS_PACKED
156
157#define DCIDR_PUT(cidr) ((cidr) - 1)
158#define DCIDR_GET(cidr, i) (__CIDR(cidr, i) + 1)
159#else
160#define DCIDR_PUT(cidr) (cidr)
161#define DCIDR_GET(cidr, i) __CIDR(cidr, i)
162#endif
163
164#define INIT_CIDR(cidr, host_mask) \
165 DCIDR_PUT(((cidr) ? NCIDR_GET(cidr) : host_mask))
166
167#ifdef IP_SET_HASH_WITH_NET0
168
169#define NLEN (HOST_MASK + 1)
170#define CIDR_POS(c) ((c) - 1)
171#else
172
173#define NLEN HOST_MASK
174#define CIDR_POS(c) ((c) - 2)
175#endif
176
177#else
178#define NLEN 0
179#endif
180
181#define SET_ELEM_EXPIRED(set, d) \
182 (SET_WITH_TIMEOUT(set) && \
183 ip_set_timeout_expired(ext_timeout(d, set)))
184
185#endif
186
187#ifndef MTYPE
188#error "MTYPE is not defined!"
189#endif
190
191#ifndef HTYPE
192#error "HTYPE is not defined!"
193#endif
194
195#ifndef HOST_MASK
196#error "HOST_MASK is not defined!"
197#endif
198
199
200
201#undef ahash_data
202#undef mtype_data_equal
203#undef mtype_do_data_match
204#undef mtype_data_set_flags
205#undef mtype_data_reset_elem
206#undef mtype_data_reset_flags
207#undef mtype_data_netmask
208#undef mtype_data_list
209#undef mtype_data_next
210#undef mtype_elem
211
212#undef mtype_ahash_destroy
213#undef mtype_ext_cleanup
214#undef mtype_add_cidr
215#undef mtype_del_cidr
216#undef mtype_ahash_memsize
217#undef mtype_flush
218#undef mtype_destroy
219#undef mtype_same_set
220#undef mtype_kadt
221#undef mtype_uadt
222
223#undef mtype_add
224#undef mtype_del
225#undef mtype_test_cidrs
226#undef mtype_test
227#undef mtype_uref
228#undef mtype_resize
229#undef mtype_ext_size
230#undef mtype_resize_ad
231#undef mtype_head
232#undef mtype_list
233#undef mtype_gc_do
234#undef mtype_gc
235#undef mtype_gc_init
236#undef mtype_variant
237#undef mtype_data_match
238
239#undef htype
240#undef HKEY
241
242#define mtype_data_equal IPSET_TOKEN(MTYPE, _data_equal)
243#ifdef IP_SET_HASH_WITH_NETS
244#define mtype_do_data_match IPSET_TOKEN(MTYPE, _do_data_match)
245#else
246#define mtype_do_data_match(d) 1
247#endif
248#define mtype_data_set_flags IPSET_TOKEN(MTYPE, _data_set_flags)
249#define mtype_data_reset_elem IPSET_TOKEN(MTYPE, _data_reset_elem)
250#define mtype_data_reset_flags IPSET_TOKEN(MTYPE, _data_reset_flags)
251#define mtype_data_netmask IPSET_TOKEN(MTYPE, _data_netmask)
252#define mtype_data_list IPSET_TOKEN(MTYPE, _data_list)
253#define mtype_data_next IPSET_TOKEN(MTYPE, _data_next)
254#define mtype_elem IPSET_TOKEN(MTYPE, _elem)
255
256#define mtype_ahash_destroy IPSET_TOKEN(MTYPE, _ahash_destroy)
257#define mtype_ext_cleanup IPSET_TOKEN(MTYPE, _ext_cleanup)
258#define mtype_add_cidr IPSET_TOKEN(MTYPE, _add_cidr)
259#define mtype_del_cidr IPSET_TOKEN(MTYPE, _del_cidr)
260#define mtype_ahash_memsize IPSET_TOKEN(MTYPE, _ahash_memsize)
261#define mtype_flush IPSET_TOKEN(MTYPE, _flush)
262#define mtype_destroy IPSET_TOKEN(MTYPE, _destroy)
263#define mtype_same_set IPSET_TOKEN(MTYPE, _same_set)
264#define mtype_kadt IPSET_TOKEN(MTYPE, _kadt)
265#define mtype_uadt IPSET_TOKEN(MTYPE, _uadt)
266
267#define mtype_add IPSET_TOKEN(MTYPE, _add)
268#define mtype_del IPSET_TOKEN(MTYPE, _del)
269#define mtype_test_cidrs IPSET_TOKEN(MTYPE, _test_cidrs)
270#define mtype_test IPSET_TOKEN(MTYPE, _test)
271#define mtype_uref IPSET_TOKEN(MTYPE, _uref)
272#define mtype_resize IPSET_TOKEN(MTYPE, _resize)
273#define mtype_ext_size IPSET_TOKEN(MTYPE, _ext_size)
274#define mtype_resize_ad IPSET_TOKEN(MTYPE, _resize_ad)
275#define mtype_head IPSET_TOKEN(MTYPE, _head)
276#define mtype_list IPSET_TOKEN(MTYPE, _list)
277#define mtype_gc_do IPSET_TOKEN(MTYPE, _gc_do)
278#define mtype_gc IPSET_TOKEN(MTYPE, _gc)
279#define mtype_gc_init IPSET_TOKEN(MTYPE, _gc_init)
280#define mtype_variant IPSET_TOKEN(MTYPE, _variant)
281#define mtype_data_match IPSET_TOKEN(MTYPE, _data_match)
282
283#ifndef HKEY_DATALEN
284#define HKEY_DATALEN sizeof(struct mtype_elem)
285#endif
286
287#define htype MTYPE
288
289#define HKEY(data, initval, htable_bits) \
290({ \
291 const u32 *__k = (const u32 *)data; \
292 u32 __l = HKEY_DATALEN / sizeof(u32); \
293 \
294 BUILD_BUG_ON(HKEY_DATALEN % sizeof(u32) != 0); \
295 \
296 jhash2(__k, __l, initval) & jhash_mask(htable_bits); \
297})
298
299
300struct htype {
301 struct htable __rcu *table;
302 struct htable_gc gc;
303 u32 maxelem;
304 u32 initval;
305#ifdef IP_SET_HASH_WITH_MARKMASK
306 u32 markmask;
307#endif
308 u8 bucketsize;
309#ifdef IP_SET_HASH_WITH_NETMASK
310 u8 netmask;
311#endif
312 struct list_head ad;
313 struct mtype_elem next;
314#ifdef IP_SET_HASH_WITH_NETS
315 struct net_prefixes nets[NLEN];
316#endif
317};
318
319
320struct mtype_resize_ad {
321 struct list_head list;
322 enum ipset_adt ad;
323 struct mtype_elem d;
324 struct ip_set_ext ext;
325 struct ip_set_ext mext;
326 u32 flags;
327};
328
329#ifdef IP_SET_HASH_WITH_NETS
330
331
332
333static void
334mtype_add_cidr(struct ip_set *set, struct htype *h, u8 cidr, u8 n)
335{
336 int i, j;
337
338 spin_lock_bh(&set->lock);
339
340 for (i = 0, j = -1; i < NLEN && h->nets[i].cidr[n]; i++) {
341 if (j != -1) {
342 continue;
343 } else if (h->nets[i].cidr[n] < cidr) {
344 j = i;
345 } else if (h->nets[i].cidr[n] == cidr) {
346 h->nets[CIDR_POS(cidr)].nets[n]++;
347 goto unlock;
348 }
349 }
350 if (j != -1) {
351 for (; i > j; i--)
352 h->nets[i].cidr[n] = h->nets[i - 1].cidr[n];
353 }
354 h->nets[i].cidr[n] = cidr;
355 h->nets[CIDR_POS(cidr)].nets[n] = 1;
356unlock:
357 spin_unlock_bh(&set->lock);
358}
359
360static void
361mtype_del_cidr(struct ip_set *set, struct htype *h, u8 cidr, u8 n)
362{
363 u8 i, j, net_end = NLEN - 1;
364
365 spin_lock_bh(&set->lock);
366 for (i = 0; i < NLEN; i++) {
367 if (h->nets[i].cidr[n] != cidr)
368 continue;
369 h->nets[CIDR_POS(cidr)].nets[n]--;
370 if (h->nets[CIDR_POS(cidr)].nets[n] > 0)
371 goto unlock;
372 for (j = i; j < net_end && h->nets[j].cidr[n]; j++)
373 h->nets[j].cidr[n] = h->nets[j + 1].cidr[n];
374 h->nets[j].cidr[n] = 0;
375 goto unlock;
376 }
377unlock:
378 spin_unlock_bh(&set->lock);
379}
380#endif
381
382
383static size_t
384mtype_ahash_memsize(const struct htype *h, const struct htable *t)
385{
386 return sizeof(*h) + sizeof(*t) + ahash_sizeof_regions(t->htable_bits);
387}
388
389
390#define ahash_data(n, i, dsize) \
391 ((struct mtype_elem *)((n)->value + ((i) * (dsize))))
392
393static void
394mtype_ext_cleanup(struct ip_set *set, struct hbucket *n)
395{
396 int i;
397
398 for (i = 0; i < n->pos; i++)
399 if (test_bit(i, n->used))
400 ip_set_ext_destroy(set, ahash_data(n, i, set->dsize));
401}
402
403
404static void
405mtype_flush(struct ip_set *set)
406{
407 struct htype *h = set->data;
408 struct htable *t;
409 struct hbucket *n;
410 u32 r, i;
411
412 t = ipset_dereference_nfnl(h->table);
413 for (r = 0; r < ahash_numof_locks(t->htable_bits); r++) {
414 spin_lock_bh(&t->hregion[r].lock);
415 for (i = ahash_bucket_start(r, t->htable_bits);
416 i < ahash_bucket_end(r, t->htable_bits); i++) {
417 n = __ipset_dereference(hbucket(t, i));
418 if (!n)
419 continue;
420 if (set->extensions & IPSET_EXT_DESTROY)
421 mtype_ext_cleanup(set, n);
422
423 rcu_assign_pointer(hbucket(t, i), NULL);
424 kfree_rcu(n, rcu);
425 }
426 t->hregion[r].ext_size = 0;
427 t->hregion[r].elements = 0;
428 spin_unlock_bh(&t->hregion[r].lock);
429 }
430#ifdef IP_SET_HASH_WITH_NETS
431 memset(h->nets, 0, sizeof(h->nets));
432#endif
433}
434
435
436static void
437mtype_ahash_destroy(struct ip_set *set, struct htable *t, bool ext_destroy)
438{
439 struct hbucket *n;
440 u32 i;
441
442 for (i = 0; i < jhash_size(t->htable_bits); i++) {
443 n = __ipset_dereference(hbucket(t, i));
444 if (!n)
445 continue;
446 if (set->extensions & IPSET_EXT_DESTROY && ext_destroy)
447 mtype_ext_cleanup(set, n);
448
449 kfree(n);
450 }
451
452 ip_set_free(t->hregion);
453 ip_set_free(t);
454}
455
456
457static void
458mtype_destroy(struct ip_set *set)
459{
460 struct htype *h = set->data;
461 struct list_head *l, *lt;
462
463 if (SET_WITH_TIMEOUT(set))
464 cancel_delayed_work_sync(&h->gc.dwork);
465
466 mtype_ahash_destroy(set, ipset_dereference_nfnl(h->table), true);
467 list_for_each_safe(l, lt, &h->ad) {
468 list_del(l);
469 kfree(l);
470 }
471 kfree(h);
472
473 set->data = NULL;
474}
475
476static bool
477mtype_same_set(const struct ip_set *a, const struct ip_set *b)
478{
479 const struct htype *x = a->data;
480 const struct htype *y = b->data;
481
482
483 return x->maxelem == y->maxelem &&
484 a->timeout == b->timeout &&
485#ifdef IP_SET_HASH_WITH_NETMASK
486 x->netmask == y->netmask &&
487#endif
488#ifdef IP_SET_HASH_WITH_MARKMASK
489 x->markmask == y->markmask &&
490#endif
491 a->extensions == b->extensions;
492}
493
494static void
495mtype_gc_do(struct ip_set *set, struct htype *h, struct htable *t, u32 r)
496{
497 struct hbucket *n, *tmp;
498 struct mtype_elem *data;
499 u32 i, j, d;
500 size_t dsize = set->dsize;
501#ifdef IP_SET_HASH_WITH_NETS
502 u8 k;
503#endif
504 u8 htable_bits = t->htable_bits;
505
506 spin_lock_bh(&t->hregion[r].lock);
507 for (i = ahash_bucket_start(r, htable_bits);
508 i < ahash_bucket_end(r, htable_bits); i++) {
509 n = __ipset_dereference(hbucket(t, i));
510 if (!n)
511 continue;
512 for (j = 0, d = 0; j < n->pos; j++) {
513 if (!test_bit(j, n->used)) {
514 d++;
515 continue;
516 }
517 data = ahash_data(n, j, dsize);
518 if (!ip_set_timeout_expired(ext_timeout(data, set)))
519 continue;
520 pr_debug("expired %u/%u\n", i, j);
521 clear_bit(j, n->used);
522 smp_mb__after_atomic();
523#ifdef IP_SET_HASH_WITH_NETS
524 for (k = 0; k < IPSET_NET_COUNT; k++)
525 mtype_del_cidr(set, h,
526 NCIDR_PUT(DCIDR_GET(data->cidr, k)),
527 k);
528#endif
529 t->hregion[r].elements--;
530 ip_set_ext_destroy(set, data);
531 d++;
532 }
533 if (d >= AHASH_INIT_SIZE) {
534 if (d >= n->size) {
535 t->hregion[r].ext_size -=
536 ext_size(n->size, dsize);
537 rcu_assign_pointer(hbucket(t, i), NULL);
538 kfree_rcu(n, rcu);
539 continue;
540 }
541 tmp = kzalloc(sizeof(*tmp) +
542 (n->size - AHASH_INIT_SIZE) * dsize,
543 GFP_ATOMIC);
544 if (!tmp)
545
546 continue;
547 tmp->size = n->size - AHASH_INIT_SIZE;
548 for (j = 0, d = 0; j < n->pos; j++) {
549 if (!test_bit(j, n->used))
550 continue;
551 data = ahash_data(n, j, dsize);
552 memcpy(tmp->value + d * dsize,
553 data, dsize);
554 set_bit(d, tmp->used);
555 d++;
556 }
557 tmp->pos = d;
558 t->hregion[r].ext_size -=
559 ext_size(AHASH_INIT_SIZE, dsize);
560 rcu_assign_pointer(hbucket(t, i), tmp);
561 kfree_rcu(n, rcu);
562 }
563 }
564 spin_unlock_bh(&t->hregion[r].lock);
565}
566
567static void
568mtype_gc(struct work_struct *work)
569{
570 struct htable_gc *gc;
571 struct ip_set *set;
572 struct htype *h;
573 struct htable *t;
574 u32 r, numof_locks;
575 unsigned int next_run;
576
577 gc = container_of(work, struct htable_gc, dwork.work);
578 set = gc->set;
579 h = set->data;
580
581 spin_lock_bh(&set->lock);
582 t = ipset_dereference_set(h->table, set);
583 atomic_inc(&t->uref);
584 numof_locks = ahash_numof_locks(t->htable_bits);
585 r = gc->region++;
586 if (r >= numof_locks) {
587 r = gc->region = 0;
588 }
589 next_run = (IPSET_GC_PERIOD(set->timeout) * HZ) / numof_locks;
590 if (next_run < HZ/10)
591 next_run = HZ/10;
592 spin_unlock_bh(&set->lock);
593
594 mtype_gc_do(set, h, t, r);
595
596 if (atomic_dec_and_test(&t->uref) && atomic_read(&t->ref)) {
597 pr_debug("Table destroy after resize by expire: %p\n", t);
598 mtype_ahash_destroy(set, t, false);
599 }
600
601 queue_delayed_work(system_power_efficient_wq, &gc->dwork, next_run);
602
603}
604
605static void
606mtype_gc_init(struct htable_gc *gc)
607{
608 INIT_DEFERRABLE_WORK(&gc->dwork, mtype_gc);
609 queue_delayed_work(system_power_efficient_wq, &gc->dwork, HZ);
610}
611
612static int
613mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
614 struct ip_set_ext *mext, u32 flags);
615static int
616mtype_del(struct ip_set *set, void *value, const struct ip_set_ext *ext,
617 struct ip_set_ext *mext, u32 flags);
618
619
620
621
622
623static int
624mtype_resize(struct ip_set *set, bool retried)
625{
626 struct htype *h = set->data;
627 struct htable *t, *orig;
628 u8 htable_bits;
629 size_t hsize, dsize = set->dsize;
630#ifdef IP_SET_HASH_WITH_NETS
631 u8 flags;
632 struct mtype_elem *tmp;
633#endif
634 struct mtype_elem *data;
635 struct mtype_elem *d;
636 struct hbucket *n, *m;
637 struct list_head *l, *lt;
638 struct mtype_resize_ad *x;
639 u32 i, j, r, nr, key;
640 int ret;
641
642#ifdef IP_SET_HASH_WITH_NETS
643 tmp = kmalloc(dsize, GFP_KERNEL);
644 if (!tmp)
645 return -ENOMEM;
646#endif
647 orig = ipset_dereference_bh_nfnl(h->table);
648 htable_bits = orig->htable_bits;
649
650retry:
651 ret = 0;
652 htable_bits++;
653 if (!htable_bits)
654 goto hbwarn;
655 hsize = htable_size(htable_bits);
656 if (!hsize)
657 goto hbwarn;
658 t = ip_set_alloc(hsize);
659 if (!t) {
660 ret = -ENOMEM;
661 goto out;
662 }
663 t->hregion = ip_set_alloc(ahash_sizeof_regions(htable_bits));
664 if (!t->hregion) {
665 ip_set_free(t);
666 ret = -ENOMEM;
667 goto out;
668 }
669 t->htable_bits = htable_bits;
670 t->maxelem = h->maxelem / ahash_numof_locks(htable_bits);
671 for (i = 0; i < ahash_numof_locks(htable_bits); i++)
672 spin_lock_init(&t->hregion[i].lock);
673
674
675
676
677 orig = ipset_dereference_bh_nfnl(h->table);
678 atomic_set(&orig->ref, 1);
679 atomic_inc(&orig->uref);
680 pr_debug("attempt to resize set %s from %u to %u, t %p\n",
681 set->name, orig->htable_bits, htable_bits, orig);
682 for (r = 0; r < ahash_numof_locks(orig->htable_bits); r++) {
683
684 rcu_read_lock_bh();
685 for (i = ahash_bucket_start(r, orig->htable_bits);
686 i < ahash_bucket_end(r, orig->htable_bits); i++) {
687 n = __ipset_dereference(hbucket(orig, i));
688 if (!n)
689 continue;
690 for (j = 0; j < n->pos; j++) {
691 if (!test_bit(j, n->used))
692 continue;
693 data = ahash_data(n, j, dsize);
694 if (SET_ELEM_EXPIRED(set, data))
695 continue;
696#ifdef IP_SET_HASH_WITH_NETS
697
698
699
700 flags = 0;
701 memcpy(tmp, data, dsize);
702 data = tmp;
703 mtype_data_reset_flags(data, &flags);
704#endif
705 key = HKEY(data, h->initval, htable_bits);
706 m = __ipset_dereference(hbucket(t, key));
707 nr = ahash_region(key, htable_bits);
708 if (!m) {
709 m = kzalloc(sizeof(*m) +
710 AHASH_INIT_SIZE * dsize,
711 GFP_ATOMIC);
712 if (!m) {
713 ret = -ENOMEM;
714 goto cleanup;
715 }
716 m->size = AHASH_INIT_SIZE;
717 t->hregion[nr].ext_size +=
718 ext_size(AHASH_INIT_SIZE,
719 dsize);
720 RCU_INIT_POINTER(hbucket(t, key), m);
721 } else if (m->pos >= m->size) {
722 struct hbucket *ht;
723
724 if (m->size >= AHASH_MAX(h)) {
725 ret = -EAGAIN;
726 } else {
727 ht = kzalloc(sizeof(*ht) +
728 (m->size + AHASH_INIT_SIZE)
729 * dsize,
730 GFP_ATOMIC);
731 if (!ht)
732 ret = -ENOMEM;
733 }
734 if (ret < 0)
735 goto cleanup;
736 memcpy(ht, m, sizeof(struct hbucket) +
737 m->size * dsize);
738 ht->size = m->size + AHASH_INIT_SIZE;
739 t->hregion[nr].ext_size +=
740 ext_size(AHASH_INIT_SIZE,
741 dsize);
742 kfree(m);
743 m = ht;
744 RCU_INIT_POINTER(hbucket(t, key), ht);
745 }
746 d = ahash_data(m, m->pos, dsize);
747 memcpy(d, data, dsize);
748 set_bit(m->pos++, m->used);
749 t->hregion[nr].elements++;
750#ifdef IP_SET_HASH_WITH_NETS
751 mtype_data_reset_flags(d, &flags);
752#endif
753 }
754 }
755 rcu_read_unlock_bh();
756 }
757
758
759 rcu_assign_pointer(h->table, t);
760
761
762 synchronize_rcu();
763
764 pr_debug("set %s resized from %u (%p) to %u (%p)\n", set->name,
765 orig->htable_bits, orig, t->htable_bits, t);
766
767
768
769
770 list_for_each_safe(l, lt, &h->ad) {
771 x = list_entry(l, struct mtype_resize_ad, list);
772 if (x->ad == IPSET_ADD) {
773 mtype_add(set, &x->d, &x->ext, &x->mext, x->flags);
774 } else {
775 mtype_del(set, &x->d, NULL, NULL, 0);
776 }
777 list_del(l);
778 kfree(l);
779 }
780
781 if (atomic_dec_and_test(&orig->uref)) {
782 pr_debug("Table destroy by resize %p\n", orig);
783 mtype_ahash_destroy(set, orig, false);
784 }
785
786out:
787#ifdef IP_SET_HASH_WITH_NETS
788 kfree(tmp);
789#endif
790 return ret;
791
792cleanup:
793 rcu_read_unlock_bh();
794 atomic_set(&orig->ref, 0);
795 atomic_dec(&orig->uref);
796 mtype_ahash_destroy(set, t, false);
797 if (ret == -EAGAIN)
798 goto retry;
799 goto out;
800
801hbwarn:
802
803 pr_warn("Cannot increase the hashsize of set %s further\n", set->name);
804 ret = -IPSET_ERR_HASH_FULL;
805 goto out;
806}
807
808
809static void
810mtype_ext_size(struct ip_set *set, u32 *elements, size_t *ext_size)
811{
812 struct htype *h = set->data;
813 const struct htable *t;
814 u32 i, j, r;
815 struct hbucket *n;
816 struct mtype_elem *data;
817
818 t = rcu_dereference_bh(h->table);
819 for (r = 0; r < ahash_numof_locks(t->htable_bits); r++) {
820 for (i = ahash_bucket_start(r, t->htable_bits);
821 i < ahash_bucket_end(r, t->htable_bits); i++) {
822 n = rcu_dereference_bh(hbucket(t, i));
823 if (!n)
824 continue;
825 for (j = 0; j < n->pos; j++) {
826 if (!test_bit(j, n->used))
827 continue;
828 data = ahash_data(n, j, set->dsize);
829 if (!SET_ELEM_EXPIRED(set, data))
830 (*elements)++;
831 }
832 }
833 *ext_size += t->hregion[r].ext_size;
834 }
835}
836
837
838
839
840static int
841mtype_add(struct ip_set *set, void *value, const struct ip_set_ext *ext,
842 struct ip_set_ext *mext, u32 flags)
843{
844 struct htype *h = set->data;
845 struct htable *t;
846 const struct mtype_elem *d = value;
847 struct mtype_elem *data;
848 struct hbucket *n, *old = ERR_PTR(-ENOENT);
849 int i, j = -1, ret;
850 bool flag_exist = flags & IPSET_FLAG_EXIST;
851 bool deleted = false, forceadd = false, reuse = false;
852 u32 r, key, multi = 0, elements, maxelem;
853
854 rcu_read_lock_bh();
855 t = rcu_dereference_bh(h->table);
856 key = HKEY(value, h->initval, t->htable_bits);
857 r = ahash_region(key, t->htable_bits);
858 atomic_inc(&t->uref);
859 elements = t->hregion[r].elements;
860 maxelem = t->maxelem;
861 if (elements >= maxelem) {
862 u32 e;
863 if (SET_WITH_TIMEOUT(set)) {
864 rcu_read_unlock_bh();
865 mtype_gc_do(set, h, t, r);
866 rcu_read_lock_bh();
867 }
868 maxelem = h->maxelem;
869 elements = 0;
870 for (e = 0; e < ahash_numof_locks(t->htable_bits); e++)
871 elements += t->hregion[e].elements;
872 if (elements >= maxelem && SET_WITH_FORCEADD(set))
873 forceadd = true;
874 }
875 rcu_read_unlock_bh();
876
877 spin_lock_bh(&t->hregion[r].lock);
878 n = rcu_dereference_bh(hbucket(t, key));
879 if (!n) {
880 if (forceadd || elements >= maxelem)
881 goto set_full;
882 old = NULL;
883 n = kzalloc(sizeof(*n) + AHASH_INIT_SIZE * set->dsize,
884 GFP_ATOMIC);
885 if (!n) {
886 ret = -ENOMEM;
887 goto unlock;
888 }
889 n->size = AHASH_INIT_SIZE;
890 t->hregion[r].ext_size +=
891 ext_size(AHASH_INIT_SIZE, set->dsize);
892 goto copy_elem;
893 }
894 for (i = 0; i < n->pos; i++) {
895 if (!test_bit(i, n->used)) {
896
897 if (j == -1) {
898 deleted = reuse = true;
899 j = i;
900 }
901 continue;
902 }
903 data = ahash_data(n, i, set->dsize);
904 if (mtype_data_equal(data, d, &multi)) {
905 if (flag_exist || SET_ELEM_EXPIRED(set, data)) {
906
907 j = i;
908 goto overwrite_extensions;
909 }
910 ret = -IPSET_ERR_EXIST;
911 goto unlock;
912 }
913
914 if (SET_ELEM_EXPIRED(set, data) && j == -1) {
915 j = i;
916 reuse = true;
917 }
918 }
919 if (reuse || forceadd) {
920 if (j == -1)
921 j = 0;
922 data = ahash_data(n, j, set->dsize);
923 if (!deleted) {
924#ifdef IP_SET_HASH_WITH_NETS
925 for (i = 0; i < IPSET_NET_COUNT; i++)
926 mtype_del_cidr(set, h,
927 NCIDR_PUT(DCIDR_GET(data->cidr, i)),
928 i);
929#endif
930 ip_set_ext_destroy(set, data);
931 t->hregion[r].elements--;
932 }
933 goto copy_data;
934 }
935 if (elements >= maxelem)
936 goto set_full;
937
938 if (n->pos >= n->size) {
939 TUNE_BUCKETSIZE(h, multi);
940 if (n->size >= AHASH_MAX(h)) {
941
942 mtype_data_next(&h->next, d);
943 ret = -EAGAIN;
944 goto resize;
945 }
946 old = n;
947 n = kzalloc(sizeof(*n) +
948 (old->size + AHASH_INIT_SIZE) * set->dsize,
949 GFP_ATOMIC);
950 if (!n) {
951 ret = -ENOMEM;
952 goto unlock;
953 }
954 memcpy(n, old, sizeof(struct hbucket) +
955 old->size * set->dsize);
956 n->size = old->size + AHASH_INIT_SIZE;
957 t->hregion[r].ext_size +=
958 ext_size(AHASH_INIT_SIZE, set->dsize);
959 }
960
961copy_elem:
962 j = n->pos++;
963 data = ahash_data(n, j, set->dsize);
964copy_data:
965 t->hregion[r].elements++;
966#ifdef IP_SET_HASH_WITH_NETS
967 for (i = 0; i < IPSET_NET_COUNT; i++)
968 mtype_add_cidr(set, h, NCIDR_PUT(DCIDR_GET(d->cidr, i)), i);
969#endif
970 memcpy(data, d, sizeof(struct mtype_elem));
971overwrite_extensions:
972#ifdef IP_SET_HASH_WITH_NETS
973 mtype_data_set_flags(data, flags);
974#endif
975 if (SET_WITH_COUNTER(set))
976 ip_set_init_counter(ext_counter(data, set), ext);
977 if (SET_WITH_COMMENT(set))
978 ip_set_init_comment(set, ext_comment(data, set), ext);
979 if (SET_WITH_SKBINFO(set))
980 ip_set_init_skbinfo(ext_skbinfo(data, set), ext);
981
982 if (SET_WITH_TIMEOUT(set))
983 ip_set_timeout_set(ext_timeout(data, set), ext->timeout);
984 smp_mb__before_atomic();
985 set_bit(j, n->used);
986 if (old != ERR_PTR(-ENOENT)) {
987 rcu_assign_pointer(hbucket(t, key), n);
988 if (old)
989 kfree_rcu(old, rcu);
990 }
991 ret = 0;
992resize:
993 spin_unlock_bh(&t->hregion[r].lock);
994 if (atomic_read(&t->ref) && ext->target) {
995
996 struct mtype_resize_ad *x;
997
998 x = kzalloc(sizeof(struct mtype_resize_ad), GFP_ATOMIC);
999 if (!x)
1000
1001 goto out;
1002 x->ad = IPSET_ADD;
1003 memcpy(&x->d, value, sizeof(struct mtype_elem));
1004 memcpy(&x->ext, ext, sizeof(struct ip_set_ext));
1005 memcpy(&x->mext, mext, sizeof(struct ip_set_ext));
1006 x->flags = flags;
1007 spin_lock_bh(&set->lock);
1008 list_add_tail(&x->list, &h->ad);
1009 spin_unlock_bh(&set->lock);
1010 }
1011 goto out;
1012
1013set_full:
1014 if (net_ratelimit())
1015 pr_warn("Set %s is full, maxelem %u reached\n",
1016 set->name, maxelem);
1017 ret = -IPSET_ERR_HASH_FULL;
1018unlock:
1019 spin_unlock_bh(&t->hregion[r].lock);
1020out:
1021 if (atomic_dec_and_test(&t->uref) && atomic_read(&t->ref)) {
1022 pr_debug("Table destroy after resize by add: %p\n", t);
1023 mtype_ahash_destroy(set, t, false);
1024 }
1025 return ret;
1026}
1027
1028
1029
1030static int
1031mtype_del(struct ip_set *set, void *value, const struct ip_set_ext *ext,
1032 struct ip_set_ext *mext, u32 flags)
1033{
1034 struct htype *h = set->data;
1035 struct htable *t;
1036 const struct mtype_elem *d = value;
1037 struct mtype_elem *data;
1038 struct hbucket *n;
1039 struct mtype_resize_ad *x = NULL;
1040 int i, j, k, r, ret = -IPSET_ERR_EXIST;
1041 u32 key, multi = 0;
1042 size_t dsize = set->dsize;
1043
1044
1045
1046
1047 rcu_read_lock_bh();
1048 t = rcu_dereference_bh(h->table);
1049 key = HKEY(value, h->initval, t->htable_bits);
1050 r = ahash_region(key, t->htable_bits);
1051 atomic_inc(&t->uref);
1052 rcu_read_unlock_bh();
1053
1054 spin_lock_bh(&t->hregion[r].lock);
1055 n = rcu_dereference_bh(hbucket(t, key));
1056 if (!n)
1057 goto out;
1058 for (i = 0, k = 0; i < n->pos; i++) {
1059 if (!test_bit(i, n->used)) {
1060 k++;
1061 continue;
1062 }
1063 data = ahash_data(n, i, dsize);
1064 if (!mtype_data_equal(data, d, &multi))
1065 continue;
1066 if (SET_ELEM_EXPIRED(set, data))
1067 goto out;
1068
1069 ret = 0;
1070 clear_bit(i, n->used);
1071 smp_mb__after_atomic();
1072 if (i + 1 == n->pos)
1073 n->pos--;
1074 t->hregion[r].elements--;
1075#ifdef IP_SET_HASH_WITH_NETS
1076 for (j = 0; j < IPSET_NET_COUNT; j++)
1077 mtype_del_cidr(set, h,
1078 NCIDR_PUT(DCIDR_GET(d->cidr, j)), j);
1079#endif
1080 ip_set_ext_destroy(set, data);
1081
1082 if (atomic_read(&t->ref) && ext->target) {
1083
1084
1085
1086 x = kzalloc(sizeof(struct mtype_resize_ad),
1087 GFP_ATOMIC);
1088 if (x) {
1089 x->ad = IPSET_DEL;
1090 memcpy(&x->d, value,
1091 sizeof(struct mtype_elem));
1092 x->flags = flags;
1093 }
1094 }
1095 for (; i < n->pos; i++) {
1096 if (!test_bit(i, n->used))
1097 k++;
1098 }
1099 if (n->pos == 0 && k == 0) {
1100 t->hregion[r].ext_size -= ext_size(n->size, dsize);
1101 rcu_assign_pointer(hbucket(t, key), NULL);
1102 kfree_rcu(n, rcu);
1103 } else if (k >= AHASH_INIT_SIZE) {
1104 struct hbucket *tmp = kzalloc(sizeof(*tmp) +
1105 (n->size - AHASH_INIT_SIZE) * dsize,
1106 GFP_ATOMIC);
1107 if (!tmp)
1108 goto out;
1109 tmp->size = n->size - AHASH_INIT_SIZE;
1110 for (j = 0, k = 0; j < n->pos; j++) {
1111 if (!test_bit(j, n->used))
1112 continue;
1113 data = ahash_data(n, j, dsize);
1114 memcpy(tmp->value + k * dsize, data, dsize);
1115 set_bit(k, tmp->used);
1116 k++;
1117 }
1118 tmp->pos = k;
1119 t->hregion[r].ext_size -=
1120 ext_size(AHASH_INIT_SIZE, dsize);
1121 rcu_assign_pointer(hbucket(t, key), tmp);
1122 kfree_rcu(n, rcu);
1123 }
1124 goto out;
1125 }
1126
1127out:
1128 spin_unlock_bh(&t->hregion[r].lock);
1129 if (x) {
1130 spin_lock_bh(&set->lock);
1131 list_add(&x->list, &h->ad);
1132 spin_unlock_bh(&set->lock);
1133 }
1134 if (atomic_dec_and_test(&t->uref) && atomic_read(&t->ref)) {
1135 pr_debug("Table destroy after resize by del: %p\n", t);
1136 mtype_ahash_destroy(set, t, false);
1137 }
1138 return ret;
1139}
1140
1141static int
1142mtype_data_match(struct mtype_elem *data, const struct ip_set_ext *ext,
1143 struct ip_set_ext *mext, struct ip_set *set, u32 flags)
1144{
1145 if (!ip_set_match_extensions(set, ext, mext, flags, data))
1146 return 0;
1147
1148 return mtype_do_data_match(data);
1149}
1150
1151#ifdef IP_SET_HASH_WITH_NETS
1152
1153
1154
1155static int
1156mtype_test_cidrs(struct ip_set *set, struct mtype_elem *d,
1157 const struct ip_set_ext *ext,
1158 struct ip_set_ext *mext, u32 flags)
1159{
1160 struct htype *h = set->data;
1161 struct htable *t = rcu_dereference_bh(h->table);
1162 struct hbucket *n;
1163 struct mtype_elem *data;
1164#if IPSET_NET_COUNT == 2
1165 struct mtype_elem orig = *d;
1166 int ret, i, j = 0, k;
1167#else
1168 int ret, i, j = 0;
1169#endif
1170 u32 key, multi = 0;
1171
1172 pr_debug("test by nets\n");
1173 for (; j < NLEN && h->nets[j].cidr[0] && !multi; j++) {
1174#if IPSET_NET_COUNT == 2
1175 mtype_data_reset_elem(d, &orig);
1176 mtype_data_netmask(d, NCIDR_GET(h->nets[j].cidr[0]), false);
1177 for (k = 0; k < NLEN && h->nets[k].cidr[1] && !multi;
1178 k++) {
1179 mtype_data_netmask(d, NCIDR_GET(h->nets[k].cidr[1]),
1180 true);
1181#else
1182 mtype_data_netmask(d, NCIDR_GET(h->nets[j].cidr[0]));
1183#endif
1184 key = HKEY(d, h->initval, t->htable_bits);
1185 n = rcu_dereference_bh(hbucket(t, key));
1186 if (!n)
1187 continue;
1188 for (i = 0; i < n->pos; i++) {
1189 if (!test_bit(i, n->used))
1190 continue;
1191 data = ahash_data(n, i, set->dsize);
1192 if (!mtype_data_equal(data, d, &multi))
1193 continue;
1194 ret = mtype_data_match(data, ext, mext, set, flags);
1195 if (ret != 0)
1196 return ret;
1197#ifdef IP_SET_HASH_WITH_MULTI
1198
1199 multi = 0;
1200#endif
1201 }
1202#if IPSET_NET_COUNT == 2
1203 }
1204#endif
1205 }
1206 return 0;
1207}
1208#endif
1209
1210
1211static int
1212mtype_test(struct ip_set *set, void *value, const struct ip_set_ext *ext,
1213 struct ip_set_ext *mext, u32 flags)
1214{
1215 struct htype *h = set->data;
1216 struct htable *t;
1217 struct mtype_elem *d = value;
1218 struct hbucket *n;
1219 struct mtype_elem *data;
1220 int i, ret = 0;
1221 u32 key, multi = 0;
1222
1223 rcu_read_lock_bh();
1224 t = rcu_dereference_bh(h->table);
1225#ifdef IP_SET_HASH_WITH_NETS
1226
1227
1228
1229 for (i = 0; i < IPSET_NET_COUNT; i++)
1230 if (DCIDR_GET(d->cidr, i) != HOST_MASK)
1231 break;
1232 if (i == IPSET_NET_COUNT) {
1233 ret = mtype_test_cidrs(set, d, ext, mext, flags);
1234 goto out;
1235 }
1236#endif
1237
1238 key = HKEY(d, h->initval, t->htable_bits);
1239 n = rcu_dereference_bh(hbucket(t, key));
1240 if (!n) {
1241 ret = 0;
1242 goto out;
1243 }
1244 for (i = 0; i < n->pos; i++) {
1245 if (!test_bit(i, n->used))
1246 continue;
1247 data = ahash_data(n, i, set->dsize);
1248 if (!mtype_data_equal(data, d, &multi))
1249 continue;
1250 ret = mtype_data_match(data, ext, mext, set, flags);
1251 if (ret != 0)
1252 goto out;
1253 }
1254out:
1255 rcu_read_unlock_bh();
1256 return ret;
1257}
1258
1259
1260static int
1261mtype_head(struct ip_set *set, struct sk_buff *skb)
1262{
1263 struct htype *h = set->data;
1264 const struct htable *t;
1265 struct nlattr *nested;
1266 size_t memsize;
1267 u32 elements = 0;
1268 size_t ext_size = 0;
1269 u8 htable_bits;
1270
1271 rcu_read_lock_bh();
1272 t = rcu_dereference_bh(h->table);
1273 mtype_ext_size(set, &elements, &ext_size);
1274 memsize = mtype_ahash_memsize(h, t) + ext_size + set->ext_size;
1275 htable_bits = t->htable_bits;
1276 rcu_read_unlock_bh();
1277
1278 nested = nla_nest_start(skb, IPSET_ATTR_DATA);
1279 if (!nested)
1280 goto nla_put_failure;
1281 if (nla_put_net32(skb, IPSET_ATTR_HASHSIZE,
1282 htonl(jhash_size(htable_bits))) ||
1283 nla_put_net32(skb, IPSET_ATTR_MAXELEM, htonl(h->maxelem)))
1284 goto nla_put_failure;
1285#ifdef IP_SET_HASH_WITH_NETMASK
1286 if (h->netmask != HOST_MASK &&
1287 nla_put_u8(skb, IPSET_ATTR_NETMASK, h->netmask))
1288 goto nla_put_failure;
1289#endif
1290#ifdef IP_SET_HASH_WITH_MARKMASK
1291 if (nla_put_u32(skb, IPSET_ATTR_MARKMASK, h->markmask))
1292 goto nla_put_failure;
1293#endif
1294 if (set->flags & IPSET_CREATE_FLAG_BUCKETSIZE) {
1295 if (nla_put_u8(skb, IPSET_ATTR_BUCKETSIZE, h->bucketsize) ||
1296 nla_put_net32(skb, IPSET_ATTR_INITVAL, htonl(h->initval)))
1297 goto nla_put_failure;
1298 }
1299 if (nla_put_net32(skb, IPSET_ATTR_REFERENCES, htonl(set->ref)) ||
1300 nla_put_net32(skb, IPSET_ATTR_MEMSIZE, htonl(memsize)) ||
1301 nla_put_net32(skb, IPSET_ATTR_ELEMENTS, htonl(elements)))
1302 goto nla_put_failure;
1303 if (unlikely(ip_set_put_flags(skb, set)))
1304 goto nla_put_failure;
1305 nla_nest_end(skb, nested);
1306
1307 return 0;
1308nla_put_failure:
1309 return -EMSGSIZE;
1310}
1311
1312
1313static void
1314mtype_uref(struct ip_set *set, struct netlink_callback *cb, bool start)
1315{
1316 struct htype *h = set->data;
1317 struct htable *t;
1318
1319 if (start) {
1320 rcu_read_lock_bh();
1321 t = ipset_dereference_bh_nfnl(h->table);
1322 atomic_inc(&t->uref);
1323 cb->args[IPSET_CB_PRIVATE] = (unsigned long)t;
1324 rcu_read_unlock_bh();
1325 } else if (cb->args[IPSET_CB_PRIVATE]) {
1326 t = (struct htable *)cb->args[IPSET_CB_PRIVATE];
1327 if (atomic_dec_and_test(&t->uref) && atomic_read(&t->ref)) {
1328 pr_debug("Table destroy after resize "
1329 " by dump: %p\n", t);
1330 mtype_ahash_destroy(set, t, false);
1331 }
1332 cb->args[IPSET_CB_PRIVATE] = 0;
1333 }
1334}
1335
1336
1337static int
1338mtype_list(const struct ip_set *set,
1339 struct sk_buff *skb, struct netlink_callback *cb)
1340{
1341 const struct htable *t;
1342 struct nlattr *atd, *nested;
1343 const struct hbucket *n;
1344 const struct mtype_elem *e;
1345 u32 first = cb->args[IPSET_CB_ARG0];
1346
1347 void *incomplete;
1348 int i, ret = 0;
1349
1350 atd = nla_nest_start(skb, IPSET_ATTR_ADT);
1351 if (!atd)
1352 return -EMSGSIZE;
1353
1354 pr_debug("list hash set %s\n", set->name);
1355 t = (const struct htable *)cb->args[IPSET_CB_PRIVATE];
1356
1357 rcu_read_lock();
1358 for (; cb->args[IPSET_CB_ARG0] < jhash_size(t->htable_bits);
1359 cb->args[IPSET_CB_ARG0]++) {
1360 cond_resched_rcu();
1361 incomplete = skb_tail_pointer(skb);
1362 n = rcu_dereference(hbucket(t, cb->args[IPSET_CB_ARG0]));
1363 pr_debug("cb->arg bucket: %lu, t %p n %p\n",
1364 cb->args[IPSET_CB_ARG0], t, n);
1365 if (!n)
1366 continue;
1367 for (i = 0; i < n->pos; i++) {
1368 if (!test_bit(i, n->used))
1369 continue;
1370 e = ahash_data(n, i, set->dsize);
1371 if (SET_ELEM_EXPIRED(set, e))
1372 continue;
1373 pr_debug("list hash %lu hbucket %p i %u, data %p\n",
1374 cb->args[IPSET_CB_ARG0], n, i, e);
1375 nested = nla_nest_start(skb, IPSET_ATTR_DATA);
1376 if (!nested) {
1377 if (cb->args[IPSET_CB_ARG0] == first) {
1378 nla_nest_cancel(skb, atd);
1379 ret = -EMSGSIZE;
1380 goto out;
1381 }
1382 goto nla_put_failure;
1383 }
1384 if (mtype_data_list(skb, e))
1385 goto nla_put_failure;
1386 if (ip_set_put_extensions(skb, set, e, true))
1387 goto nla_put_failure;
1388 nla_nest_end(skb, nested);
1389 }
1390 }
1391 nla_nest_end(skb, atd);
1392
1393 cb->args[IPSET_CB_ARG0] = 0;
1394
1395 goto out;
1396
1397nla_put_failure:
1398 nlmsg_trim(skb, incomplete);
1399 if (unlikely(first == cb->args[IPSET_CB_ARG0])) {
1400 pr_warn("Can't list set %s: one bucket does not fit into a message. Please report it!\n",
1401 set->name);
1402 cb->args[IPSET_CB_ARG0] = 0;
1403 ret = -EMSGSIZE;
1404 } else {
1405 nla_nest_end(skb, atd);
1406 }
1407out:
1408 rcu_read_unlock();
1409 return ret;
1410}
1411
1412static int
1413IPSET_TOKEN(MTYPE, _kadt)(struct ip_set *set, const struct sk_buff *skb,
1414 const struct xt_action_param *par,
1415 enum ipset_adt adt, struct ip_set_adt_opt *opt);
1416
1417static int
1418IPSET_TOKEN(MTYPE, _uadt)(struct ip_set *set, struct nlattr *tb[],
1419 enum ipset_adt adt, u32 *lineno, u32 flags,
1420 bool retried);
1421
1422static const struct ip_set_type_variant mtype_variant = {
1423 .kadt = mtype_kadt,
1424 .uadt = mtype_uadt,
1425 .adt = {
1426 [IPSET_ADD] = mtype_add,
1427 [IPSET_DEL] = mtype_del,
1428 [IPSET_TEST] = mtype_test,
1429 },
1430 .destroy = mtype_destroy,
1431 .flush = mtype_flush,
1432 .head = mtype_head,
1433 .list = mtype_list,
1434 .uref = mtype_uref,
1435 .resize = mtype_resize,
1436 .same_set = mtype_same_set,
1437 .region_lock = true,
1438};
1439
1440#ifdef IP_SET_EMIT_CREATE
1441static int
1442IPSET_TOKEN(HTYPE, _create)(struct net *net, struct ip_set *set,
1443 struct nlattr *tb[], u32 flags)
1444{
1445 u32 hashsize = IPSET_DEFAULT_HASHSIZE, maxelem = IPSET_DEFAULT_MAXELEM;
1446#ifdef IP_SET_HASH_WITH_MARKMASK
1447 u32 markmask;
1448#endif
1449 u8 hbits;
1450#ifdef IP_SET_HASH_WITH_NETMASK
1451 u8 netmask;
1452#endif
1453 size_t hsize;
1454 struct htype *h;
1455 struct htable *t;
1456 u32 i;
1457
1458 pr_debug("Create set %s with family %s\n",
1459 set->name, set->family == NFPROTO_IPV4 ? "inet" : "inet6");
1460
1461#ifdef IP_SET_PROTO_UNDEF
1462 if (set->family != NFPROTO_UNSPEC)
1463 return -IPSET_ERR_INVALID_FAMILY;
1464#else
1465 if (!(set->family == NFPROTO_IPV4 || set->family == NFPROTO_IPV6))
1466 return -IPSET_ERR_INVALID_FAMILY;
1467#endif
1468
1469 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_HASHSIZE) ||
1470 !ip_set_optattr_netorder(tb, IPSET_ATTR_MAXELEM) ||
1471 !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
1472 !ip_set_optattr_netorder(tb, IPSET_ATTR_CADT_FLAGS)))
1473 return -IPSET_ERR_PROTOCOL;
1474
1475#ifdef IP_SET_HASH_WITH_MARKMASK
1476
1477 if (unlikely(!ip_set_optattr_netorder(tb, IPSET_ATTR_MARKMASK)))
1478 return -IPSET_ERR_PROTOCOL;
1479
1480 markmask = 0xffffffff;
1481 if (tb[IPSET_ATTR_MARKMASK]) {
1482 markmask = ntohl(nla_get_be32(tb[IPSET_ATTR_MARKMASK]));
1483 if (markmask == 0)
1484 return -IPSET_ERR_INVALID_MARKMASK;
1485 }
1486#endif
1487
1488#ifdef IP_SET_HASH_WITH_NETMASK
1489 netmask = set->family == NFPROTO_IPV4 ? 32 : 128;
1490 if (tb[IPSET_ATTR_NETMASK]) {
1491 netmask = nla_get_u8(tb[IPSET_ATTR_NETMASK]);
1492
1493 if ((set->family == NFPROTO_IPV4 && netmask > 32) ||
1494 (set->family == NFPROTO_IPV6 && netmask > 128) ||
1495 netmask == 0)
1496 return -IPSET_ERR_INVALID_NETMASK;
1497 }
1498#endif
1499
1500 if (tb[IPSET_ATTR_HASHSIZE]) {
1501 hashsize = ip_set_get_h32(tb[IPSET_ATTR_HASHSIZE]);
1502 if (hashsize < IPSET_MIMINAL_HASHSIZE)
1503 hashsize = IPSET_MIMINAL_HASHSIZE;
1504 }
1505
1506 if (tb[IPSET_ATTR_MAXELEM])
1507 maxelem = ip_set_get_h32(tb[IPSET_ATTR_MAXELEM]);
1508
1509 hsize = sizeof(*h);
1510 h = kzalloc(hsize, GFP_KERNEL);
1511 if (!h)
1512 return -ENOMEM;
1513
1514
1515
1516
1517
1518 hbits = fls(hashsize - 1);
1519 hsize = htable_size(hbits);
1520 if (hsize == 0) {
1521 kfree(h);
1522 return -ENOMEM;
1523 }
1524 t = ip_set_alloc(hsize);
1525 if (!t) {
1526 kfree(h);
1527 return -ENOMEM;
1528 }
1529 t->hregion = ip_set_alloc(ahash_sizeof_regions(hbits));
1530 if (!t->hregion) {
1531 ip_set_free(t);
1532 kfree(h);
1533 return -ENOMEM;
1534 }
1535 h->gc.set = set;
1536 for (i = 0; i < ahash_numof_locks(hbits); i++)
1537 spin_lock_init(&t->hregion[i].lock);
1538 h->maxelem = maxelem;
1539#ifdef IP_SET_HASH_WITH_NETMASK
1540 h->netmask = netmask;
1541#endif
1542#ifdef IP_SET_HASH_WITH_MARKMASK
1543 h->markmask = markmask;
1544#endif
1545 if (tb[IPSET_ATTR_INITVAL])
1546 h->initval = ntohl(nla_get_be32(tb[IPSET_ATTR_INITVAL]));
1547 else
1548 get_random_bytes(&h->initval, sizeof(h->initval));
1549 h->bucketsize = AHASH_MAX_SIZE;
1550 if (tb[IPSET_ATTR_BUCKETSIZE]) {
1551 h->bucketsize = nla_get_u8(tb[IPSET_ATTR_BUCKETSIZE]);
1552 if (h->bucketsize < AHASH_INIT_SIZE)
1553 h->bucketsize = AHASH_INIT_SIZE;
1554 else if (h->bucketsize > AHASH_MAX_SIZE)
1555 h->bucketsize = AHASH_MAX_SIZE;
1556 else if (h->bucketsize % 2)
1557 h->bucketsize += 1;
1558 }
1559 t->htable_bits = hbits;
1560 t->maxelem = h->maxelem / ahash_numof_locks(hbits);
1561 RCU_INIT_POINTER(h->table, t);
1562
1563 INIT_LIST_HEAD(&h->ad);
1564 set->data = h;
1565#ifndef IP_SET_PROTO_UNDEF
1566 if (set->family == NFPROTO_IPV4) {
1567#endif
1568 set->variant = &IPSET_TOKEN(HTYPE, 4_variant);
1569 set->dsize = ip_set_elem_len(set, tb,
1570 sizeof(struct IPSET_TOKEN(HTYPE, 4_elem)),
1571 __alignof__(struct IPSET_TOKEN(HTYPE, 4_elem)));
1572#ifndef IP_SET_PROTO_UNDEF
1573 } else {
1574 set->variant = &IPSET_TOKEN(HTYPE, 6_variant);
1575 set->dsize = ip_set_elem_len(set, tb,
1576 sizeof(struct IPSET_TOKEN(HTYPE, 6_elem)),
1577 __alignof__(struct IPSET_TOKEN(HTYPE, 6_elem)));
1578 }
1579#endif
1580 set->timeout = IPSET_NO_TIMEOUT;
1581 if (tb[IPSET_ATTR_TIMEOUT]) {
1582 set->timeout = ip_set_timeout_uget(tb[IPSET_ATTR_TIMEOUT]);
1583#ifndef IP_SET_PROTO_UNDEF
1584 if (set->family == NFPROTO_IPV4)
1585#endif
1586 IPSET_TOKEN(HTYPE, 4_gc_init)(&h->gc);
1587#ifndef IP_SET_PROTO_UNDEF
1588 else
1589 IPSET_TOKEN(HTYPE, 6_gc_init)(&h->gc);
1590#endif
1591 }
1592 pr_debug("create %s hashsize %u (%u) maxelem %u: %p(%p)\n",
1593 set->name, jhash_size(t->htable_bits),
1594 t->htable_bits, h->maxelem, set->data, t);
1595
1596 return 0;
1597}
1598#endif
1599
1600#undef HKEY_DATALEN
1601