Lines Matching +full:no +full:- +full:read +full:- +full:rollover
1 // SPDX-License-Identifier: GPL-2.0-or-later
7 * PACKET - implements raw packet sockets.
15 * Alan Cox : new skbuff lists, look ma no backlogs!
18 * added. Also fixed the peek/read crash
22 * Alan Cox : Re-commented the code.
27 * dubious gcc output. Can you read
30 * Alan Cox : New buffers. Use sk->mac.raw.
101 - If the device has no dev->header_ops->create, there is no LL header
108 needed_headroom to be (the real WiFi header length - the fake Ethernet
110 - packet socket receives packets with pulled ll header,
114 -----------
117 mac_header -> ll header
118 data -> data
121 mac_header -> ll header
122 data -> ll header
125 mac_header -> data
128 data -> data
131 mac_header -> data. ll header is invisible to us.
132 data -> data
140 ------------
143 mac_header -> ll header
144 data -> ll header
147 mac_header -> data
148 data -> data
183 #define BLOCK_STATUS(x) ((x)->hdr.bh1.block_status)
184 #define BLOCK_NUM_PKTS(x) ((x)->hdr.bh1.num_pkts)
185 #define BLOCK_O2FP(x) ((x)->hdr.bh1.offset_to_first_pkt)
186 #define BLOCK_LEN(x) ((x)->hdr.bh1.blk_len)
187 #define BLOCK_SNUM(x) ((x)->hdr.bh1.seq_num)
188 #define BLOCK_O2PRIV(x) ((x)->offset_to_priv)
232 #define PACKET_SKB_CB(__skb) ((struct packet_skb_cb *)((__skb)->cb))
234 #define GET_PBDQC_FROM_RB(x) ((struct tpacket_kbdq_core *)(&(x)->prb_bdqc))
236 ((struct tpacket_block_desc *)((x)->pkbdq[(bid)].buffer))
238 ((struct tpacket_block_desc *)((x)->pkbdq[(x)->kactive_blk_num].buffer))
240 (((x)->kactive_blk_num < ((x)->knum_blocks-1)) ? \
241 ((x)->kactive_blk_num+1) : 0)
254 next = skb->next; in nf_hook_direct_egress()
257 if (!nf_hook_egress(skb, &rc, skb->dev)) in nf_hook_direct_egress()
263 tail->next = skb; in nf_hook_direct_egress()
293 dev = rcu_dereference(po->cached_dev); in packet_cached_dev_get()
303 rcu_assign_pointer(po->cached_dev, dev); in packet_cached_dev_assign()
308 RCU_INIT_POINTER(po->cached_dev, NULL); in packet_cached_dev_reset()
313 struct net_device *dev = skb->dev; in packet_pick_tx_queue()
314 const struct net_device_ops *ops = dev->netdev_ops; in packet_pick_tx_queue()
319 skb->sender_cpu = cpu + 1; in packet_pick_tx_queue()
321 skb_record_rx_queue(skb, cpu % dev->real_num_tx_queues); in packet_pick_tx_queue()
322 if (ops->ndo_select_queue) { in packet_pick_tx_queue()
323 queue_index = ops->ndo_select_queue(dev, skb, NULL); in packet_pick_tx_queue()
341 if (po->fanout) in __register_prot_hook()
344 dev_add_pack(&po->prot_hook); in __register_prot_hook()
353 lockdep_assert_held_once(&pkt_sk(sk)->bind_lock); in register_prot_hook()
358 * the po->bind_lock and do a synchronize_net to make sure no
360 * of po->prot_hook. If the sync parameter is false, it is the
367 lockdep_assert_held_once(&po->bind_lock); in __unregister_prot_hook()
371 if (po->fanout) in __unregister_prot_hook()
374 __dev_remove_pack(&po->prot_hook); in __unregister_prot_hook()
379 spin_unlock(&po->bind_lock); in __unregister_prot_hook()
381 spin_lock(&po->bind_lock); in __unregister_prot_hook()
407 switch (po->tp_version) { in __packet_set_status()
409 WRITE_ONCE(h.h1->tp_status, status); in __packet_set_status()
410 flush_dcache_page(pgv_to_page(&h.h1->tp_status)); in __packet_set_status()
413 WRITE_ONCE(h.h2->tp_status, status); in __packet_set_status()
414 flush_dcache_page(pgv_to_page(&h.h2->tp_status)); in __packet_set_status()
417 WRITE_ONCE(h.h3->tp_status, status); in __packet_set_status()
418 flush_dcache_page(pgv_to_page(&h.h3->tp_status)); in __packet_set_status()
437 switch (po->tp_version) { in __packet_get_status()
439 flush_dcache_page(pgv_to_page(&h.h1->tp_status)); in __packet_get_status()
440 return READ_ONCE(h.h1->tp_status); in __packet_get_status()
442 flush_dcache_page(pgv_to_page(&h.h2->tp_status)); in __packet_get_status()
443 return READ_ONCE(h.h2->tp_status); in __packet_get_status()
445 flush_dcache_page(pgv_to_page(&h.h3->tp_status)); in __packet_get_status()
446 return READ_ONCE(h.h3->tp_status); in __packet_get_status()
461 ktime_to_timespec64_cond(shhwtstamps->hwtstamp, ts)) in tpacket_get_timestamp()
478 if (!(ts_status = tpacket_get_timestamp(skb, &ts, READ_ONCE(po->tp_tstamp)))) in __packet_set_timestamp()
484 * all store the seconds in a 32-bit unsigned integer. in __packet_set_timestamp()
485 * If we create a version 4, that should have a 64-bit timestamp, in __packet_set_timestamp()
486 * either 64-bit seconds + 32-bit nanoseconds, or just 64-bit in __packet_set_timestamp()
489 switch (po->tp_version) { in __packet_set_timestamp()
491 h.h1->tp_sec = ts.tv_sec; in __packet_set_timestamp()
492 h.h1->tp_usec = ts.tv_nsec / NSEC_PER_USEC; in __packet_set_timestamp()
495 h.h2->tp_sec = ts.tv_sec; in __packet_set_timestamp()
496 h.h2->tp_nsec = ts.tv_nsec; in __packet_set_timestamp()
499 h.h3->tp_sec = ts.tv_sec; in __packet_set_timestamp()
500 h.h3->tp_nsec = ts.tv_nsec; in __packet_set_timestamp()
508 flush_dcache_page(pgv_to_page(&h.h1->tp_sec)); in __packet_set_timestamp()
522 pg_vec_pos = position / rb->frames_per_block; in packet_lookup_frame()
523 frame_offset = position % rb->frames_per_block; in packet_lookup_frame()
525 h.raw = rb->pg_vec[pg_vec_pos].buffer + in packet_lookup_frame()
526 (frame_offset * rb->frame_size); in packet_lookup_frame()
538 return packet_lookup_frame(po, rb, rb->head, status); in packet_current_frame()
543 del_timer_sync(&pkc->retire_blk_timer); in prb_del_retire_blk_timer()
551 pkc = GET_PBDQC_FROM_RB(&po->rx_ring); in prb_shutdown_retire_blk_timer()
553 spin_lock_bh(&rb_queue->lock); in prb_shutdown_retire_blk_timer()
554 pkc->delete_blk_timer = 1; in prb_shutdown_retire_blk_timer()
555 spin_unlock_bh(&rb_queue->lock); in prb_shutdown_retire_blk_timer()
564 pkc = GET_PBDQC_FROM_RB(&po->rx_ring); in prb_setup_retire_blk_timer()
565 timer_setup(&pkc->retire_blk_timer, prb_retire_rx_blk_timer_expired, in prb_setup_retire_blk_timer()
567 pkc->retire_blk_timer.expires = jiffies; in prb_setup_retire_blk_timer()
579 dev = __dev_get_by_index(sock_net(&po->sk), po->ifindex); in prb_calc_retire_blk_tmo()
610 p1->feature_req_word = req_u->req3.tp_feature_req_word; in prb_init_ft_ops()
623 p1->knxt_seq_num = 1; in init_prb_bdqc()
624 p1->pkbdq = pg_vec; in init_prb_bdqc()
626 p1->pkblk_start = pg_vec[0].buffer; in init_prb_bdqc()
627 p1->kblk_size = req_u->req3.tp_block_size; in init_prb_bdqc()
628 p1->knum_blocks = req_u->req3.tp_block_nr; in init_prb_bdqc()
629 p1->hdrlen = po->tp_hdrlen; in init_prb_bdqc()
630 p1->version = po->tp_version; in init_prb_bdqc()
631 p1->last_kactive_blk_num = 0; in init_prb_bdqc()
632 po->stats.stats3.tp_freeze_q_cnt = 0; in init_prb_bdqc()
633 if (req_u->req3.tp_retire_blk_tov) in init_prb_bdqc()
634 p1->retire_blk_tov = req_u->req3.tp_retire_blk_tov; in init_prb_bdqc()
636 p1->retire_blk_tov = prb_calc_retire_blk_tmo(po, in init_prb_bdqc()
637 req_u->req3.tp_block_size); in init_prb_bdqc()
638 p1->tov_in_jiffies = msecs_to_jiffies(p1->retire_blk_tov); in init_prb_bdqc()
639 p1->blk_sizeof_priv = req_u->req3.tp_sizeof_priv; in init_prb_bdqc()
640 rwlock_init(&p1->blk_fill_in_prog_lock); in init_prb_bdqc()
642 p1->max_frame_len = p1->kblk_size - BLK_PLUS_PRIV(p1->blk_sizeof_priv); in init_prb_bdqc()
653 mod_timer(&pkc->retire_blk_timer, in _prb_refresh_rx_retire_blk_timer()
654 jiffies + pkc->tov_in_jiffies); in _prb_refresh_rx_retire_blk_timer()
655 pkc->last_kactive_blk_num = pkc->kactive_blk_num; in _prb_refresh_rx_retire_blk_timer()
662 * on packet-by-packet basis.
664 * With a 1MB block-size, on a 1Gbps line, it will take
677 * a) line-speed and b) block-size.
685 struct tpacket_kbdq_core *pkc = GET_PBDQC_FROM_RB(&po->rx_ring); in prb_retire_rx_blk_timer_expired()
689 spin_lock(&po->sk.sk_receive_queue.lock); in prb_retire_rx_blk_timer_expired()
694 if (unlikely(pkc->delete_blk_timer)) in prb_retire_rx_blk_timer_expired()
708 write_lock(&pkc->blk_fill_in_prog_lock); in prb_retire_rx_blk_timer_expired()
709 write_unlock(&pkc->blk_fill_in_prog_lock); in prb_retire_rx_blk_timer_expired()
712 if (pkc->last_kactive_blk_num == pkc->kactive_blk_num) { in prb_retire_rx_blk_timer_expired()
724 /* Case 1. Queue was frozen because user-space was in prb_retire_rx_blk_timer_expired()
729 * Ok, user-space is still behind. in prb_retire_rx_blk_timer_expired()
734 /* Case 2. queue was frozen,user-space caught up, in prb_retire_rx_blk_timer_expired()
739 * Thawing/timer-refresh is a side effect. in prb_retire_rx_blk_timer_expired()
751 spin_unlock(&po->sk.sk_receive_queue.lock); in prb_retire_rx_blk_timer_expired()
767 end = (u8 *)PAGE_ALIGN((unsigned long)pkc1->pkblk_end); in prb_flush_block()
804 struct tpacket_hdr_v1 *h1 = &pbd1->hdr.bh1; in prb_close_block()
805 struct sock *sk = &po->sk; in prb_close_block()
807 if (atomic_read(&po->tp_drops)) in prb_close_block()
810 last_pkt = (struct tpacket3_hdr *)pkc1->prev; in prb_close_block()
811 last_pkt->tp_next_offset = 0; in prb_close_block()
815 h1->ts_last_pkt.ts_sec = last_pkt->tp_sec; in prb_close_block()
816 h1->ts_last_pkt.ts_nsec = last_pkt->tp_nsec; in prb_close_block()
818 /* Ok, we tmo'd - so get the current time. in prb_close_block()
825 h1->ts_last_pkt.ts_sec = ts.tv_sec; in prb_close_block()
826 h1->ts_last_pkt.ts_nsec = ts.tv_nsec; in prb_close_block()
834 sk->sk_data_ready(sk); in prb_close_block()
836 pkc1->kactive_blk_num = GET_NEXT_PRB_BLK_NUM(pkc1); in prb_close_block()
841 pkc->reset_pending_on_curr_blk = 0; in prb_thaw_queue()
855 struct tpacket_hdr_v1 *h1 = &pbd1->hdr.bh1; in prb_open_block()
863 BLOCK_SNUM(pbd1) = pkc1->knxt_seq_num++; in prb_open_block()
865 BLOCK_LEN(pbd1) = BLK_PLUS_PRIV(pkc1->blk_sizeof_priv); in prb_open_block()
869 h1->ts_first_pkt.ts_sec = ts.tv_sec; in prb_open_block()
870 h1->ts_first_pkt.ts_nsec = ts.tv_nsec; in prb_open_block()
872 pkc1->pkblk_start = (char *)pbd1; in prb_open_block()
873 pkc1->nxt_offset = pkc1->pkblk_start + BLK_PLUS_PRIV(pkc1->blk_sizeof_priv); in prb_open_block()
875 BLOCK_O2FP(pbd1) = (__u32)BLK_PLUS_PRIV(pkc1->blk_sizeof_priv); in prb_open_block()
878 pbd1->version = pkc1->version; in prb_open_block()
879 pkc1->prev = pkc1->nxt_offset; in prb_open_block()
880 pkc1->pkblk_end = pkc1->pkblk_start + pkc1->kblk_size; in prb_open_block()
893 * 4) user-space is either sleeping or processing block '0'.
894 * 5) tpacket_rcv is currently filling block '7', since there is no space left,
895 * it will close block-7,loop around and try to fill block '0'.
896 * call-flow:
900 * |->(BLOCK_STATUS == USER) evaluates to true
901 * 5.1) Since block-0 is currently in-use, we just freeze the queue.
906 * re-open block-0 in near future.
908 * case and __packet_lookup_frame_in_block will check if block-0
909 * is free and can now be re-used.
914 pkc->reset_pending_on_curr_blk = 1; in prb_freeze_queue()
915 po->stats.stats3.tp_freeze_q_cnt++; in prb_freeze_queue()
948 return (void *)pkc->nxt_offset; in prb_dispatch_next_block()
960 * cpu-0 and tpacket_rcv() got invoked on cpu-1, didn't in prb_retire_current_block()
965 * the timer-handler already handled this case. in prb_retire_current_block()
969 write_lock(&pkc->blk_fill_in_prog_lock); in prb_retire_current_block()
970 write_unlock(&pkc->blk_fill_in_prog_lock); in prb_retire_current_block()
984 return pkc->reset_pending_on_curr_blk; in prb_queue_frozen()
988 __releases(&pkc->blk_fill_in_prog_lock) in prb_clear_blk_fill_status()
992 read_unlock(&pkc->blk_fill_in_prog_lock); in prb_clear_blk_fill_status()
998 ppd->hv1.tp_rxhash = skb_get_hash(pkc->skb); in prb_fill_rxhash()
1004 ppd->hv1.tp_rxhash = 0; in prb_clear_rxhash()
1010 if (skb_vlan_tag_present(pkc->skb)) { in prb_fill_vlan_info()
1011 ppd->hv1.tp_vlan_tci = skb_vlan_tag_get(pkc->skb); in prb_fill_vlan_info()
1012 ppd->hv1.tp_vlan_tpid = ntohs(pkc->skb->vlan_proto); in prb_fill_vlan_info()
1013 ppd->tp_status = TP_STATUS_VLAN_VALID | TP_STATUS_VLAN_TPID_VALID; in prb_fill_vlan_info()
1015 ppd->hv1.tp_vlan_tci = 0; in prb_fill_vlan_info()
1016 ppd->hv1.tp_vlan_tpid = 0; in prb_fill_vlan_info()
1017 ppd->tp_status = TP_STATUS_AVAILABLE; in prb_fill_vlan_info()
1024 ppd->hv1.tp_padding = 0; in prb_run_all_ft_ops()
1027 if (pkc->feature_req_word & TP_FT_REQ_FILL_RXHASH) in prb_run_all_ft_ops()
1037 __acquires(&pkc->blk_fill_in_prog_lock) in prb_fill_curr_block()
1042 ppd->tp_next_offset = TOTAL_PKT_LEN_INCL_ALIGN(len); in prb_fill_curr_block()
1043 pkc->prev = curr; in prb_fill_curr_block()
1044 pkc->nxt_offset += TOTAL_PKT_LEN_INCL_ALIGN(len); in prb_fill_curr_block()
1047 read_lock(&pkc->blk_fill_in_prog_lock); in prb_fill_curr_block()
1051 /* Assumes caller has the sk->rx_queue.lock */
1061 pkc = GET_PBDQC_FROM_RB(&po->rx_ring); in __packet_lookup_frame_in_block()
1068 * is still in_use by user-space. in __packet_lookup_frame_in_block()
1075 * Ok, the block was released by user-space. in __packet_lookup_frame_in_block()
1085 curr = pkc->nxt_offset; in __packet_lookup_frame_in_block()
1086 pkc->skb = skb; in __packet_lookup_frame_in_block()
1087 end = (char *)pbd + pkc->kblk_size; in __packet_lookup_frame_in_block()
1107 * No free blocks are available.user_space hasn't caught up yet. in __packet_lookup_frame_in_block()
1118 switch (po->tp_version) { in packet_current_rx_frame()
1121 curr = packet_lookup_frame(po, &po->rx_ring, in packet_current_rx_frame()
1122 po->rx_ring.head, status); in packet_current_rx_frame()
1149 if (rb->prb_bdqc.kactive_blk_num) in prb_previous_blk_num()
1150 prev = rb->prb_bdqc.kactive_blk_num-1; in prb_previous_blk_num()
1152 prev = rb->prb_bdqc.knum_blocks-1; in prb_previous_blk_num()
1169 if (po->tp_version <= TPACKET_V2) in packet_previous_rx_frame()
1178 switch (po->tp_version) { in packet_increment_rx_head()
1194 unsigned int previous = rb->head ? rb->head - 1 : rb->frame_max; in packet_previous_frame()
1200 buff->head = buff->head != buff->frame_max ? buff->head+1 : 0; in packet_increment_head()
1205 this_cpu_inc(*rb->pending_refcnt); in packet_inc_pending()
1210 this_cpu_dec(*rb->pending_refcnt); in packet_dec_pending()
1219 if (rb->pending_refcnt == NULL) in packet_read_pending()
1223 refcnt += *per_cpu_ptr(rb->pending_refcnt, cpu); in packet_read_pending()
1230 po->rx_ring.pending_refcnt = NULL; in packet_alloc_pending()
1232 po->tx_ring.pending_refcnt = alloc_percpu(unsigned int); in packet_alloc_pending()
1233 if (unlikely(po->tx_ring.pending_refcnt == NULL)) in packet_alloc_pending()
1234 return -ENOBUFS; in packet_alloc_pending()
1241 free_percpu(po->tx_ring.pending_refcnt); in packet_free_pending()
1253 len = READ_ONCE(po->rx_ring.frame_max) + 1; in __tpacket_has_room()
1254 idx = READ_ONCE(po->rx_ring.head); in __tpacket_has_room()
1258 idx -= len; in __tpacket_has_room()
1259 return packet_lookup_frame(po, &po->rx_ring, idx, TP_STATUS_KERNEL); in __tpacket_has_room()
1266 len = READ_ONCE(po->rx_ring.prb_bdqc.knum_blocks); in __tpacket_v3_has_room()
1267 idx = READ_ONCE(po->rx_ring.prb_bdqc.kactive_blk_num); in __tpacket_v3_has_room()
1271 idx -= len; in __tpacket_v3_has_room()
1272 return prb_lookup_block(po, &po->rx_ring, idx, TP_STATUS_KERNEL); in __tpacket_v3_has_room()
1278 const struct sock *sk = &po->sk; in __packet_rcv_has_room()
1281 if (po->prot_hook.func != tpacket_rcv) { in __packet_rcv_has_room()
1282 int rcvbuf = READ_ONCE(sk->sk_rcvbuf); in __packet_rcv_has_room()
1283 int avail = rcvbuf - atomic_read(&sk->sk_rmem_alloc) in __packet_rcv_has_room()
1284 - (skb ? skb->truesize : 0); in __packet_rcv_has_room()
1294 if (po->tp_version == TPACKET_V3) { in __packet_rcv_has_room()
1332 skb_queue_purge(&sk->sk_error_queue); in packet_sock_destruct()
1334 WARN_ON(atomic_read(&sk->sk_rmem_alloc)); in packet_sock_destruct()
1335 WARN_ON(refcount_read(&sk->sk_wmem_alloc)); in packet_sock_destruct()
1345 u32 *history = po->rollover->history; in fanout_flow_is_huge()
1374 unsigned int val = atomic_inc_return(&f->rr_cur); in fanout_demux_lb()
1401 po = pkt_sk(rcu_dereference(f->arr[idx])); in fanout_demux_rollover()
1411 i = j = min_t(int, po->rollover->sock, num - 1); in fanout_demux_rollover()
1413 po_next = pkt_sk(rcu_dereference(f->arr[i])); in fanout_demux_rollover()
1418 po->rollover->sock = i; in fanout_demux_rollover()
1419 atomic_long_inc(&po->rollover->num); in fanout_demux_rollover()
1421 atomic_long_inc(&po->rollover->num_huge); in fanout_demux_rollover()
1429 atomic_long_inc(&po->rollover->num_failed); in fanout_demux_rollover()
1448 prog = rcu_dereference(f->bpf_prog); in fanout_demux_bpf()
1458 return f->flags & (flag >> 8); in fanout_has_flag()
1464 struct packet_fanout *f = pt->af_packet_priv; in packet_rcv_fanout()
1465 unsigned int num = READ_ONCE(f->num_members); in packet_rcv_fanout()
1466 struct net *net = read_pnet(&f->net); in packet_rcv_fanout()
1480 switch (f->type) { in packet_rcv_fanout()
1509 po = pkt_sk(rcu_dereference(f->arr[idx])); in packet_rcv_fanout()
1510 return po->prot_hook.func(skb, dev, &po->prot_hook, orig_dev); in packet_rcv_fanout()
1520 struct packet_fanout *f = po->fanout; in __fanout_link()
1522 spin_lock(&f->lock); in __fanout_link()
1523 rcu_assign_pointer(f->arr[f->num_members], sk); in __fanout_link()
1525 f->num_members++; in __fanout_link()
1526 if (f->num_members == 1) in __fanout_link()
1527 dev_add_pack(&f->prot_hook); in __fanout_link()
1528 spin_unlock(&f->lock); in __fanout_link()
1533 struct packet_fanout *f = po->fanout; in __fanout_unlink()
1536 spin_lock(&f->lock); in __fanout_unlink()
1537 for (i = 0; i < f->num_members; i++) { in __fanout_unlink()
1538 if (rcu_dereference_protected(f->arr[i], in __fanout_unlink()
1539 lockdep_is_held(&f->lock)) == sk) in __fanout_unlink()
1542 BUG_ON(i >= f->num_members); in __fanout_unlink()
1543 rcu_assign_pointer(f->arr[i], in __fanout_unlink()
1544 rcu_dereference_protected(f->arr[f->num_members - 1], in __fanout_unlink()
1545 lockdep_is_held(&f->lock))); in __fanout_unlink()
1546 f->num_members--; in __fanout_unlink()
1547 if (f->num_members == 0) in __fanout_unlink()
1548 __dev_remove_pack(&f->prot_hook); in __fanout_unlink()
1549 spin_unlock(&f->lock); in __fanout_unlink()
1554 if (sk->sk_family != PF_PACKET) in match_fanout_group()
1557 return ptype->af_packet_priv == pkt_sk(sk)->fanout; in match_fanout_group()
1562 switch (f->type) { in fanout_init_data()
1564 atomic_set(&f->rr_cur, 0); in fanout_init_data()
1568 RCU_INIT_POINTER(f->bpf_prog, NULL); in fanout_init_data()
1577 spin_lock(&f->lock); in __fanout_set_data_bpf()
1578 old = rcu_dereference_protected(f->bpf_prog, lockdep_is_held(&f->lock)); in __fanout_set_data_bpf()
1579 rcu_assign_pointer(f->bpf_prog, new); in __fanout_set_data_bpf()
1580 spin_unlock(&f->lock); in __fanout_set_data_bpf()
1595 if (sock_flag(&po->sk, SOCK_FILTER_LOCKED)) in fanout_set_data_cbpf()
1596 return -EPERM; in fanout_set_data_cbpf()
1606 __fanout_set_data_bpf(po->fanout, new); in fanout_set_data_cbpf()
1616 if (sock_flag(&po->sk, SOCK_FILTER_LOCKED)) in fanout_set_data_ebpf()
1617 return -EPERM; in fanout_set_data_ebpf()
1619 return -EINVAL; in fanout_set_data_ebpf()
1621 return -EFAULT; in fanout_set_data_ebpf()
1627 __fanout_set_data_bpf(po->fanout, new); in fanout_set_data_ebpf()
1634 switch (po->fanout->type) { in fanout_set_data()
1640 return -EINVAL; in fanout_set_data()
1646 switch (f->type) { in fanout_release_data()
1658 if (f->id == candidate_id && in __fanout_id_is_free()
1659 read_pnet(&f->net) == sock_net(sk)) { in __fanout_id_is_free()
1685 struct packet_rollover *rollover = NULL; in fanout_add() local
1687 u16 type_flags = args->type_flags; in fanout_add()
1691 u16 id = args->id; in fanout_add()
1697 return -EINVAL; in fanout_add()
1708 return -EINVAL; in fanout_add()
1713 err = -EALREADY; in fanout_add()
1714 if (po->fanout) in fanout_add()
1719 err = -ENOMEM; in fanout_add()
1720 rollover = kzalloc(sizeof(*rollover), GFP_KERNEL); in fanout_add()
1721 if (!rollover) in fanout_add()
1723 atomic_long_set(&rollover->num, 0); in fanout_add()
1724 atomic_long_set(&rollover->num_huge, 0); in fanout_add()
1725 atomic_long_set(&rollover->num_failed, 0); in fanout_add()
1730 err = -EINVAL; in fanout_add()
1734 err = -ENOMEM; in fanout_add()
1743 if (f->id == id && in fanout_add()
1744 read_pnet(&f->net) == sock_net(sk)) { in fanout_add()
1749 err = -EINVAL; in fanout_add()
1751 if (match->flags != flags) in fanout_add()
1753 if (args->max_num_members && in fanout_add()
1754 args->max_num_members != match->max_num_members) in fanout_add()
1757 if (args->max_num_members > PACKET_FANOUT_MAX) in fanout_add()
1759 if (!args->max_num_members) in fanout_add()
1761 args->max_num_members = 256; in fanout_add()
1762 err = -ENOMEM; in fanout_add()
1763 match = kvzalloc(struct_size(match, arr, args->max_num_members), in fanout_add()
1767 write_pnet(&match->net, sock_net(sk)); in fanout_add()
1768 match->id = id; in fanout_add()
1769 match->type = type; in fanout_add()
1770 match->flags = flags; in fanout_add()
1771 INIT_LIST_HEAD(&match->list); in fanout_add()
1772 spin_lock_init(&match->lock); in fanout_add()
1773 refcount_set(&match->sk_ref, 0); in fanout_add()
1775 match->prot_hook.type = po->prot_hook.type; in fanout_add()
1776 match->prot_hook.dev = po->prot_hook.dev; in fanout_add()
1777 match->prot_hook.func = packet_rcv_fanout; in fanout_add()
1778 match->prot_hook.af_packet_priv = match; in fanout_add()
1779 match->prot_hook.af_packet_net = read_pnet(&match->net); in fanout_add()
1780 match->prot_hook.id_match = match_fanout_group; in fanout_add()
1781 match->max_num_members = args->max_num_members; in fanout_add()
1782 match->prot_hook.ignore_outgoing = type_flags & PACKET_FANOUT_FLAG_IGNORE_OUTGOING; in fanout_add()
1783 list_add(&match->list, &fanout_list); in fanout_add()
1785 err = -EINVAL; in fanout_add()
1787 spin_lock(&po->bind_lock); in fanout_add()
1789 match->type == type && in fanout_add()
1790 match->prot_hook.type == po->prot_hook.type && in fanout_add()
1791 match->prot_hook.dev == po->prot_hook.dev) { in fanout_add()
1792 err = -ENOSPC; in fanout_add()
1793 if (refcount_read(&match->sk_ref) < match->max_num_members) { in fanout_add()
1794 __dev_remove_pack(&po->prot_hook); in fanout_add()
1797 WRITE_ONCE(po->fanout, match); in fanout_add()
1799 po->rollover = rollover; in fanout_add()
1800 rollover = NULL; in fanout_add()
1801 refcount_set(&match->sk_ref, refcount_read(&match->sk_ref) + 1); in fanout_add()
1806 spin_unlock(&po->bind_lock); in fanout_add()
1808 if (err && !refcount_read(&match->sk_ref)) { in fanout_add()
1809 list_del(&match->list); in fanout_add()
1814 kfree(rollover); in fanout_add()
1819 /* If pkt_sk(sk)->fanout->sk_ref is zero, this function removes
1820 * pkt_sk(sk)->fanout from fanout_list and returns pkt_sk(sk)->fanout.
1830 f = po->fanout; in fanout_release()
1832 po->fanout = NULL; in fanout_release()
1834 if (refcount_dec_and_test(&f->sk_ref)) in fanout_release()
1835 list_del(&f->list); in fanout_release()
1847 /* Earlier code assumed this would be a VLAN pkt, double-check in packet_extra_vlan_len_allowed()
1851 if (unlikely(dev->type != ARPHRD_ETHER)) in packet_extra_vlan_len_allowed()
1855 return likely(eth_hdr(skb)->h_proto == htons(ETH_P_8021Q)); in packet_extra_vlan_len_allowed()
1873 sk = pt->af_packet_priv; in packet_rcv_spkt()
1882 * For outgoing ones skb->data == skb_mac_header(skb) in packet_rcv_spkt()
1886 if (skb->pkt_type == PACKET_LOOPBACK) in packet_rcv_spkt()
1902 spkt = &PACKET_SKB_CB(skb)->sa.pkt; in packet_rcv_spkt()
1904 skb_push(skb, skb->data - skb_mac_header(skb)); in packet_rcv_spkt()
1910 spkt->spkt_family = dev->type; in packet_rcv_spkt()
1911 strscpy(spkt->spkt_device, dev->name, sizeof(spkt->spkt_device)); in packet_rcv_spkt()
1912 spkt->spkt_protocol = skb->protocol; in packet_rcv_spkt()
1932 if ((!skb->protocol || skb->protocol == htons(ETH_P_ALL)) && in packet_parse_headers()
1933 sock->type == SOCK_RAW) { in packet_parse_headers()
1935 skb->protocol = dev_parse_header_protocol(skb); in packet_parse_headers()
1939 if (likely(skb->dev->type == ARPHRD_ETHER) && in packet_parse_headers()
1940 eth_type_vlan(skb->protocol) && in packet_parse_headers()
1941 vlan_get_protocol_and_depth(skb, skb->protocol, &depth) != 0) in packet_parse_headers()
1955 struct sock *sk = sock->sk; in packet_sendmsg_spkt()
1956 DECLARE_SOCKADDR(struct sockaddr_pkt *, saddr, msg->msg_name); in packet_sendmsg_spkt()
1969 if (msg->msg_namelen < sizeof(struct sockaddr)) in packet_sendmsg_spkt()
1970 return -EINVAL; in packet_sendmsg_spkt()
1971 if (msg->msg_namelen == sizeof(struct sockaddr_pkt)) in packet_sendmsg_spkt()
1972 proto = saddr->spkt_protocol; in packet_sendmsg_spkt()
1974 return -ENOTCONN; /* SOCK_PACKET must be sent giving an address */ in packet_sendmsg_spkt()
1980 saddr->spkt_device[sizeof(saddr->spkt_device) - 1] = 0; in packet_sendmsg_spkt()
1983 dev = dev_get_by_name_rcu(sock_net(sk), saddr->spkt_device); in packet_sendmsg_spkt()
1984 err = -ENODEV; in packet_sendmsg_spkt()
1988 err = -ENETDOWN; in packet_sendmsg_spkt()
1989 if (!(dev->flags & IFF_UP)) in packet_sendmsg_spkt()
1999 err = -EPROTONOSUPPORT; in packet_sendmsg_spkt()
2005 err = -EMSGSIZE; in packet_sendmsg_spkt()
2006 if (len > dev->mtu + dev->hard_header_len + VLAN_HLEN + extra_len) in packet_sendmsg_spkt()
2011 int tlen = dev->needed_tailroom; in packet_sendmsg_spkt()
2012 unsigned int hhlen = dev->header_ops ? dev->hard_header_len : 0; in packet_sendmsg_spkt()
2017 return -ENOBUFS; in packet_sendmsg_spkt()
2027 skb->data -= hhlen; in packet_sendmsg_spkt()
2028 skb->tail -= hhlen; in packet_sendmsg_spkt()
2038 if (!dev_validate_header(dev, skb->data, len) || !skb->len) { in packet_sendmsg_spkt()
2039 err = -EINVAL; in packet_sendmsg_spkt()
2042 if (len > (dev->mtu + dev->hard_header_len + extra_len) && in packet_sendmsg_spkt()
2044 err = -EMSGSIZE; in packet_sendmsg_spkt()
2049 if (msg->msg_controllen) { in packet_sendmsg_spkt()
2055 skb->protocol = proto; in packet_sendmsg_spkt()
2056 skb->dev = dev; in packet_sendmsg_spkt()
2057 skb->priority = READ_ONCE(sk->sk_priority); in packet_sendmsg_spkt()
2058 skb->mark = READ_ONCE(sk->sk_mark); in packet_sendmsg_spkt()
2059 skb->tstamp = sockc.transmit_time; in packet_sendmsg_spkt()
2064 skb->no_fcs = 1; in packet_sendmsg_spkt()
2086 filter = rcu_dereference(sk->sk_filter); in run_filter()
2088 res = bpf_prog_run_clear_cb(filter->prog, skb); in run_filter()
2100 return -EINVAL; in packet_rcv_vnet()
2101 *len -= vnet_hdr_sz; in packet_rcv_vnet()
2104 return -EINVAL; in packet_rcv_vnet()
2113 * Note tricky part: we DO mangle shared skb! skb->data, skb->len
2114 * and skb->cb are mangled. It works because (and until) packets
2127 u8 *skb_head = skb->data; in packet_rcv()
2128 int skb_len = skb->len; in packet_rcv()
2132 if (skb->pkt_type == PACKET_LOOPBACK) in packet_rcv()
2135 sk = pt->af_packet_priv; in packet_rcv()
2141 skb->dev = dev; in packet_rcv()
2151 if (sk->sk_type != SOCK_DGRAM) in packet_rcv()
2152 skb_push(skb, skb->data - skb_mac_header(skb)); in packet_rcv()
2153 else if (skb->pkt_type == PACKET_OUTGOING) { in packet_rcv()
2159 snaplen = skb->len; in packet_rcv()
2167 if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf) in packet_rcv()
2175 if (skb_head != skb->data) { in packet_rcv()
2176 skb->data = skb_head; in packet_rcv()
2177 skb->len = skb_len; in packet_rcv()
2183 sock_skb_cb_check_size(sizeof(*PACKET_SKB_CB(skb)) + MAX_ADDR_LEN - 8); in packet_rcv()
2185 sll = &PACKET_SKB_CB(skb)->sa.ll; in packet_rcv()
2186 sll->sll_hatype = dev->type; in packet_rcv()
2187 sll->sll_pkttype = skb->pkt_type; in packet_rcv()
2189 sll->sll_ifindex = orig_dev->ifindex; in packet_rcv()
2191 sll->sll_ifindex = dev->ifindex; in packet_rcv()
2193 sll->sll_halen = dev_parse_header(skb, sll->sll_addr); in packet_rcv()
2195 /* sll->sll_family and sll->sll_protocol are set in packet_recvmsg(). in packet_rcv()
2198 PACKET_SKB_CB(skb)->sa.origlen = skb->len; in packet_rcv()
2204 skb->dev = NULL; in packet_rcv()
2210 spin_lock(&sk->sk_receive_queue.lock); in packet_rcv()
2211 po->stats.stats1.tp_packets++; in packet_rcv()
2214 __skb_queue_tail(&sk->sk_receive_queue, skb); in packet_rcv()
2215 spin_unlock(&sk->sk_receive_queue.lock); in packet_rcv()
2216 sk->sk_data_ready(sk); in packet_rcv()
2221 atomic_inc(&po->tp_drops); in packet_rcv()
2222 atomic_inc(&sk->sk_drops); in packet_rcv()
2225 if (skb_head != skb->data && skb_shared(skb)) { in packet_rcv()
2226 skb->data = skb_head; in packet_rcv()
2227 skb->len = skb_len; in packet_rcv()
2244 u8 *skb_head = skb->data; in tpacket_rcv()
2245 int skb_len = skb->len; in tpacket_rcv()
2264 if (skb->pkt_type == PACKET_LOOPBACK) in tpacket_rcv()
2267 sk = pt->af_packet_priv; in tpacket_rcv()
2274 if (sk->sk_type != SOCK_DGRAM) in tpacket_rcv()
2275 skb_push(skb, skb->data - skb_mac_header(skb)); in tpacket_rcv()
2276 else if (skb->pkt_type == PACKET_OUTGOING) { in tpacket_rcv()
2282 snaplen = skb->len; in tpacket_rcv()
2290 atomic_inc(&po->tp_drops); in tpacket_rcv()
2294 if (skb->ip_summed == CHECKSUM_PARTIAL) in tpacket_rcv()
2296 else if (skb->pkt_type != PACKET_OUTGOING && in tpacket_rcv()
2305 if (sk->sk_type == SOCK_DGRAM) { in tpacket_rcv()
2306 macoff = netoff = TPACKET_ALIGN(po->tp_hdrlen) + 16 + in tpacket_rcv()
2307 po->tp_reserve; in tpacket_rcv()
2310 netoff = TPACKET_ALIGN(po->tp_hdrlen + in tpacket_rcv()
2312 po->tp_reserve; in tpacket_rcv()
2313 vnet_hdr_sz = READ_ONCE(po->vnet_hdr_sz); in tpacket_rcv()
2316 macoff = netoff - maclen; in tpacket_rcv()
2319 atomic_inc(&po->tp_drops); in tpacket_rcv()
2322 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2323 if (macoff + snaplen > po->rx_ring.frame_size) { in tpacket_rcv()
2324 if (po->copy_thresh && in tpacket_rcv()
2325 atomic_read(&sk->sk_rmem_alloc) < sk->sk_rcvbuf) { in tpacket_rcv()
2330 skb_head = skb->data; in tpacket_rcv()
2333 memset(&PACKET_SKB_CB(copy_skb)->sa.ll, 0, in tpacket_rcv()
2334 sizeof(PACKET_SKB_CB(copy_skb)->sa.ll)); in tpacket_rcv()
2338 snaplen = po->rx_ring.frame_size - macoff; in tpacket_rcv()
2345 GET_PBDQC_FROM_RB(&po->rx_ring)->max_frame_len)) { in tpacket_rcv()
2348 nval = GET_PBDQC_FROM_RB(&po->rx_ring)->max_frame_len - macoff; in tpacket_rcv()
2354 macoff = GET_PBDQC_FROM_RB(&po->rx_ring)->max_frame_len; in tpacket_rcv()
2358 spin_lock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2364 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2365 slot_id = po->rx_ring.head; in tpacket_rcv()
2366 if (test_bit(slot_id, po->rx_ring.rx_owner_map)) in tpacket_rcv()
2368 __set_bit(slot_id, po->rx_ring.rx_owner_map); in tpacket_rcv()
2372 virtio_net_hdr_from_skb(skb, h.raw + macoff - in tpacket_rcv()
2375 if (po->tp_version == TPACKET_V3) in tpacket_rcv()
2376 prb_clear_blk_fill_status(&po->rx_ring); in tpacket_rcv()
2380 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2381 packet_increment_rx_head(po, &po->rx_ring); in tpacket_rcv()
2383 * LOSING will be reported till you read the stats, in tpacket_rcv()
2384 * because it's COR - Clear On Read. in tpacket_rcv()
2388 if (atomic_read(&po->tp_drops)) in tpacket_rcv()
2392 po->stats.stats1.tp_packets++; in tpacket_rcv()
2396 __skb_queue_tail(&sk->sk_receive_queue, copy_skb); in tpacket_rcv()
2398 spin_unlock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2406 READ_ONCE(po->tp_tstamp) | in tpacket_rcv()
2413 switch (po->tp_version) { in tpacket_rcv()
2415 h.h1->tp_len = skb->len; in tpacket_rcv()
2416 h.h1->tp_snaplen = snaplen; in tpacket_rcv()
2417 h.h1->tp_mac = macoff; in tpacket_rcv()
2418 h.h1->tp_net = netoff; in tpacket_rcv()
2419 h.h1->tp_sec = ts.tv_sec; in tpacket_rcv()
2420 h.h1->tp_usec = ts.tv_nsec / NSEC_PER_USEC; in tpacket_rcv()
2424 h.h2->tp_len = skb->len; in tpacket_rcv()
2425 h.h2->tp_snaplen = snaplen; in tpacket_rcv()
2426 h.h2->tp_mac = macoff; in tpacket_rcv()
2427 h.h2->tp_net = netoff; in tpacket_rcv()
2428 h.h2->tp_sec = ts.tv_sec; in tpacket_rcv()
2429 h.h2->tp_nsec = ts.tv_nsec; in tpacket_rcv()
2431 h.h2->tp_vlan_tci = skb_vlan_tag_get(skb); in tpacket_rcv()
2432 h.h2->tp_vlan_tpid = ntohs(skb->vlan_proto); in tpacket_rcv()
2435 h.h2->tp_vlan_tci = 0; in tpacket_rcv()
2436 h.h2->tp_vlan_tpid = 0; in tpacket_rcv()
2438 memset(h.h2->tp_padding, 0, sizeof(h.h2->tp_padding)); in tpacket_rcv()
2445 h.h3->tp_status |= status; in tpacket_rcv()
2446 h.h3->tp_len = skb->len; in tpacket_rcv()
2447 h.h3->tp_snaplen = snaplen; in tpacket_rcv()
2448 h.h3->tp_mac = macoff; in tpacket_rcv()
2449 h.h3->tp_net = netoff; in tpacket_rcv()
2450 h.h3->tp_sec = ts.tv_sec; in tpacket_rcv()
2451 h.h3->tp_nsec = ts.tv_nsec; in tpacket_rcv()
2452 memset(h.h3->tp_padding, 0, sizeof(h.h3->tp_padding)); in tpacket_rcv()
2460 sll->sll_halen = dev_parse_header(skb, sll->sll_addr); in tpacket_rcv()
2461 sll->sll_family = AF_PACKET; in tpacket_rcv()
2462 sll->sll_hatype = dev->type; in tpacket_rcv()
2463 sll->sll_protocol = skb->protocol; in tpacket_rcv()
2464 sll->sll_pkttype = skb->pkt_type; in tpacket_rcv()
2466 sll->sll_ifindex = orig_dev->ifindex; in tpacket_rcv()
2468 sll->sll_ifindex = dev->ifindex; in tpacket_rcv()
2473 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2485 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2486 spin_lock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2488 __clear_bit(slot_id, po->rx_ring.rx_owner_map); in tpacket_rcv()
2489 spin_unlock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2490 sk->sk_data_ready(sk); in tpacket_rcv()
2491 } else if (po->tp_version == TPACKET_V3) { in tpacket_rcv()
2492 prb_clear_blk_fill_status(&po->rx_ring); in tpacket_rcv()
2496 if (skb_head != skb->data && skb_shared(skb)) { in tpacket_rcv()
2497 skb->data = skb_head; in tpacket_rcv()
2498 skb->len = skb_len; in tpacket_rcv()
2508 spin_unlock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2509 atomic_inc(&po->tp_drops); in tpacket_rcv()
2512 sk->sk_data_ready(sk); in tpacket_rcv()
2519 struct packet_sock *po = pkt_sk(skb->sk); in tpacket_destruct_skb()
2521 if (likely(po->tx_ring.pg_vec)) { in tpacket_destruct_skb()
2526 packet_dec_pending(&po->tx_ring); in tpacket_destruct_skb()
2531 if (!packet_read_pending(&po->tx_ring)) in tpacket_destruct_skb()
2532 complete(&po->skb_completion); in tpacket_destruct_skb()
2540 if ((vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && in __packet_snd_vnet_parse()
2541 (__virtio16_to_cpu(vio_le(), vnet_hdr->csum_start) + in __packet_snd_vnet_parse()
2542 __virtio16_to_cpu(vio_le(), vnet_hdr->csum_offset) + 2 > in __packet_snd_vnet_parse()
2543 __virtio16_to_cpu(vio_le(), vnet_hdr->hdr_len))) in __packet_snd_vnet_parse()
2544 vnet_hdr->hdr_len = __cpu_to_virtio16(vio_le(), in __packet_snd_vnet_parse()
2545 __virtio16_to_cpu(vio_le(), vnet_hdr->csum_start) + in __packet_snd_vnet_parse()
2546 __virtio16_to_cpu(vio_le(), vnet_hdr->csum_offset) + 2); in __packet_snd_vnet_parse()
2548 if (__virtio16_to_cpu(vio_le(), vnet_hdr->hdr_len) > len) in __packet_snd_vnet_parse()
2549 return -EINVAL; in __packet_snd_vnet_parse()
2560 return -EINVAL; in packet_snd_vnet_parse()
2561 *len -= vnet_hdr_sz; in packet_snd_vnet_parse()
2563 if (!copy_from_iter_full(vnet_hdr, sizeof(*vnet_hdr), &msg->msg_iter)) in packet_snd_vnet_parse()
2564 return -EFAULT; in packet_snd_vnet_parse()
2572 iov_iter_advance(&msg->msg_iter, vnet_hdr_sz - sizeof(struct virtio_net_hdr)); in packet_snd_vnet_parse()
2584 struct socket *sock = po->sk.sk_socket; in tpacket_fill_skb()
2590 skb->protocol = proto; in tpacket_fill_skb()
2591 skb->dev = dev; in tpacket_fill_skb()
2592 skb->priority = READ_ONCE(po->sk.sk_priority); in tpacket_fill_skb()
2593 skb->mark = READ_ONCE(po->sk.sk_mark); in tpacket_fill_skb()
2594 skb->tstamp = sockc->transmit_time; in tpacket_fill_skb()
2595 skb_setup_tx_timestamp(skb, sockc->tsflags); in tpacket_fill_skb()
2603 if (sock->type == SOCK_DGRAM) { in tpacket_fill_skb()
2607 return -EINVAL; in tpacket_fill_skb()
2611 skb_push(skb, dev->hard_header_len); in tpacket_fill_skb()
2612 skb_put(skb, copylen - dev->hard_header_len); in tpacket_fill_skb()
2616 if (!dev_validate_header(dev, skb->data, hdrlen)) in tpacket_fill_skb()
2617 return -EINVAL; in tpacket_fill_skb()
2620 to_write -= hdrlen; in tpacket_fill_skb()
2624 len_max = PAGE_SIZE - offset; in tpacket_fill_skb()
2627 skb->data_len = to_write; in tpacket_fill_skb()
2628 skb->len += to_write; in tpacket_fill_skb()
2629 skb->truesize += to_write; in tpacket_fill_skb()
2630 refcount_add(to_write, &po->sk.sk_wmem_alloc); in tpacket_fill_skb()
2633 nr_frags = skb_shinfo(skb)->nr_frags; in tpacket_fill_skb()
2638 return -EFAULT; in tpacket_fill_skb()
2646 to_write -= len; in tpacket_fill_skb()
2665 switch (po->tp_version) { in tpacket_parse_header()
2667 if (ph.h3->tp_next_offset != 0) { in tpacket_parse_header()
2669 return -EINVAL; in tpacket_parse_header()
2671 tp_len = ph.h3->tp_len; in tpacket_parse_header()
2674 tp_len = ph.h2->tp_len; in tpacket_parse_header()
2677 tp_len = ph.h1->tp_len; in tpacket_parse_header()
2682 return -EMSGSIZE; in tpacket_parse_header()
2688 off_min = po->tp_hdrlen - sizeof(struct sockaddr_ll); in tpacket_parse_header()
2689 off_max = po->tx_ring.frame_size - tp_len; in tpacket_parse_header()
2690 if (po->sk.sk_type == SOCK_DGRAM) { in tpacket_parse_header()
2691 switch (po->tp_version) { in tpacket_parse_header()
2693 off = ph.h3->tp_net; in tpacket_parse_header()
2696 off = ph.h2->tp_net; in tpacket_parse_header()
2699 off = ph.h1->tp_net; in tpacket_parse_header()
2703 switch (po->tp_version) { in tpacket_parse_header()
2705 off = ph.h3->tp_mac; in tpacket_parse_header()
2708 off = ph.h2->tp_mac; in tpacket_parse_header()
2711 off = ph.h1->tp_mac; in tpacket_parse_header()
2716 return -EINVAL; in tpacket_parse_header()
2718 off = po->tp_hdrlen - sizeof(struct sockaddr_ll); in tpacket_parse_header()
2734 DECLARE_SOCKADDR(struct sockaddr_ll *, saddr, msg->msg_name); in tpacket_snd()
2735 bool need_wait = !(msg->msg_flags & MSG_DONTWAIT); in tpacket_snd()
2736 int vnet_hdr_sz = READ_ONCE(po->vnet_hdr_sz); in tpacket_snd()
2745 mutex_lock(&po->pg_vec_lock); in tpacket_snd()
2750 if (unlikely(!po->tx_ring.pg_vec)) { in tpacket_snd()
2751 err = -EBUSY; in tpacket_snd()
2756 proto = READ_ONCE(po->num); in tpacket_snd()
2758 err = -EINVAL; in tpacket_snd()
2759 if (msg->msg_namelen < sizeof(struct sockaddr_ll)) in tpacket_snd()
2761 if (msg->msg_namelen < (saddr->sll_halen in tpacket_snd()
2765 proto = saddr->sll_protocol; in tpacket_snd()
2766 dev = dev_get_by_index(sock_net(&po->sk), saddr->sll_ifindex); in tpacket_snd()
2767 if (po->sk.sk_socket->type == SOCK_DGRAM) { in tpacket_snd()
2768 if (dev && msg->msg_namelen < dev->addr_len + in tpacket_snd()
2771 addr = saddr->sll_addr; in tpacket_snd()
2775 err = -ENXIO; in tpacket_snd()
2778 err = -ENETDOWN; in tpacket_snd()
2779 if (unlikely(!(dev->flags & IFF_UP))) in tpacket_snd()
2782 sockcm_init(&sockc, &po->sk); in tpacket_snd()
2783 if (msg->msg_controllen) { in tpacket_snd()
2784 err = sock_cmsg_send(&po->sk, msg, &sockc); in tpacket_snd()
2789 if (po->sk.sk_socket->type == SOCK_RAW) in tpacket_snd()
2790 reserve = dev->hard_header_len; in tpacket_snd()
2791 size_max = po->tx_ring.frame_size in tpacket_snd()
2792 - (po->tp_hdrlen - sizeof(struct sockaddr_ll)); in tpacket_snd()
2794 if ((size_max > dev->mtu + reserve + VLAN_HLEN) && !vnet_hdr_sz) in tpacket_snd()
2795 size_max = dev->mtu + reserve + VLAN_HLEN; in tpacket_snd()
2797 reinit_completion(&po->skb_completion); in tpacket_snd()
2800 ph = packet_current_frame(po, &po->tx_ring, in tpacket_snd()
2804 timeo = sock_sndtimeo(&po->sk, msg->msg_flags & MSG_DONTWAIT); in tpacket_snd()
2805 timeo = wait_for_completion_interruptible_timeout(&po->skb_completion, timeo); in tpacket_snd()
2807 err = !timeo ? -ETIMEDOUT : -ERESTARTSYS; in tpacket_snd()
2822 tlen = dev->needed_tailroom; in tpacket_snd()
2826 tp_len -= vnet_hdr_sz; in tpacket_snd()
2829 tp_len = -EINVAL; in tpacket_snd()
2833 vnet_hdr->hdr_len); in tpacket_snd()
2835 copylen = max_t(int, copylen, dev->hard_header_len); in tpacket_snd()
2836 skb = sock_alloc_send_skb(&po->sk, in tpacket_snd()
2838 (copylen - dev->hard_header_len), in tpacket_snd()
2850 tp_len > dev->mtu + reserve && in tpacket_snd()
2853 tp_len = -EMSGSIZE; in tpacket_snd()
2860 packet_increment_head(&po->tx_ring); in tpacket_snd()
2872 tp_len = -EINVAL; in tpacket_snd()
2878 skb->destructor = tpacket_destruct_skb; in tpacket_snd()
2880 packet_inc_pending(&po->tx_ring); in tpacket_snd()
2899 packet_increment_head(&po->tx_ring); in tpacket_snd()
2903 * to call it as it's per_cpu variable, but in fast-path in tpacket_snd()
2904 * we already short-circuit the loop with the first in tpacket_snd()
2908 (need_wait && packet_read_pending(&po->tx_ring)))); in tpacket_snd()
2919 mutex_unlock(&po->pg_vec_lock); in tpacket_snd()
2934 if (len - linear > MAX_SKB_FRAGS * (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) in packet_alloc_skb()
2935 linear = len - MAX_SKB_FRAGS * (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER); in packet_alloc_skb()
2936 skb = sock_alloc_send_pskb(sk, prepad + linear, len - linear, noblock, in packet_alloc_skb()
2943 skb->data_len = len - linear; in packet_alloc_skb()
2944 skb->len += len - linear; in packet_alloc_skb()
2951 struct sock *sk = sock->sk; in packet_snd()
2952 DECLARE_SOCKADDR(struct sockaddr_ll *, saddr, msg->msg_name); in packet_snd()
2962 int vnet_hdr_sz = READ_ONCE(po->vnet_hdr_sz); in packet_snd()
2972 proto = READ_ONCE(po->num); in packet_snd()
2974 err = -EINVAL; in packet_snd()
2975 if (msg->msg_namelen < sizeof(struct sockaddr_ll)) in packet_snd()
2977 if (msg->msg_namelen < (saddr->sll_halen + offsetof(struct sockaddr_ll, sll_addr))) in packet_snd()
2979 proto = saddr->sll_protocol; in packet_snd()
2980 dev = dev_get_by_index(sock_net(sk), saddr->sll_ifindex); in packet_snd()
2981 if (sock->type == SOCK_DGRAM) { in packet_snd()
2982 if (dev && msg->msg_namelen < dev->addr_len + in packet_snd()
2985 addr = saddr->sll_addr; in packet_snd()
2989 err = -ENXIO; in packet_snd()
2992 err = -ENETDOWN; in packet_snd()
2993 if (unlikely(!(dev->flags & IFF_UP))) in packet_snd()
2997 sockc.mark = READ_ONCE(sk->sk_mark); in packet_snd()
2998 if (msg->msg_controllen) { in packet_snd()
3004 if (sock->type == SOCK_RAW) in packet_snd()
3005 reserve = dev->hard_header_len; in packet_snd()
3014 err = -EPROTONOSUPPORT; in packet_snd()
3020 err = -EMSGSIZE; in packet_snd()
3022 (len > dev->mtu + reserve + VLAN_HLEN + extra_len)) in packet_snd()
3025 err = -ENOBUFS; in packet_snd()
3027 tlen = dev->needed_tailroom; in packet_snd()
3029 linear = max(linear, min_t(int, len, dev->hard_header_len)); in packet_snd()
3031 msg->msg_flags & MSG_DONTWAIT, &err); in packet_snd()
3037 err = -EINVAL; in packet_snd()
3038 if (sock->type == SOCK_DGRAM) { in packet_snd()
3043 skb_reserve(skb, -reserve); in packet_snd()
3045 dev->min_header_len != dev->hard_header_len) in packet_snd()
3049 /* Returns -EFAULT on error */ in packet_snd()
3050 err = skb_copy_datagram_from_iter(skb, offset, &msg->msg_iter, len); in packet_snd()
3054 if ((sock->type == SOCK_RAW && in packet_snd()
3055 !dev_validate_header(dev, skb->data, len)) || !skb->len) { in packet_snd()
3056 err = -EINVAL; in packet_snd()
3062 if (!vnet_hdr.gso_type && (len > dev->mtu + reserve + extra_len) && in packet_snd()
3064 err = -EMSGSIZE; in packet_snd()
3068 skb->protocol = proto; in packet_snd()
3069 skb->dev = dev; in packet_snd()
3070 skb->priority = READ_ONCE(sk->sk_priority); in packet_snd()
3071 skb->mark = sockc.mark; in packet_snd()
3072 skb->tstamp = sockc.transmit_time; in packet_snd()
3075 skb->no_fcs = 1; in packet_snd()
3110 struct sock *sk = sock->sk; in packet_sendmsg()
3116 if (data_race(po->tx_ring.pg_vec)) in packet_sendmsg()
3129 struct sock *sk = sock->sk; in packet_release()
3141 mutex_lock(&net->packet.sklist_lock); in packet_release()
3143 mutex_unlock(&net->packet.sklist_lock); in packet_release()
3145 sock_prot_inuse_add(net, sk->sk_prot, -1); in packet_release()
3147 spin_lock(&po->bind_lock); in packet_release()
3151 if (po->prot_hook.dev) { in packet_release()
3152 netdev_put(po->prot_hook.dev, &po->prot_hook.dev_tracker); in packet_release()
3153 po->prot_hook.dev = NULL; in packet_release()
3155 spin_unlock(&po->bind_lock); in packet_release()
3160 if (po->rx_ring.pg_vec) { in packet_release()
3165 if (po->tx_ring.pg_vec) { in packet_release()
3175 kfree(po->rollover); in packet_release()
3181 * Now the socket is dead. No more input will appear. in packet_release()
3184 sock->sk = NULL; in packet_release()
3188 skb_queue_purge(&sk->sk_receive_queue); in packet_release()
3209 spin_lock(&po->bind_lock); in packet_do_bind()
3211 proto = po->num; in packet_do_bind()
3215 if (po->fanout) { in packet_do_bind()
3216 ret = -EINVAL; in packet_do_bind()
3223 ret = -ENODEV; in packet_do_bind()
3229 ret = -ENODEV; in packet_do_bind()
3234 need_rehook = po->prot_hook.type != proto || po->prot_hook.dev != dev; in packet_do_bind()
3243 WRITE_ONCE(po->num, 0); in packet_do_bind()
3248 dev->ifindex); in packet_do_bind()
3252 WRITE_ONCE(po->num, proto); in packet_do_bind()
3253 po->prot_hook.type = proto; in packet_do_bind()
3255 netdev_put(po->prot_hook.dev, &po->prot_hook.dev_tracker); in packet_do_bind()
3258 po->prot_hook.dev = NULL; in packet_do_bind()
3259 WRITE_ONCE(po->ifindex, -1); in packet_do_bind()
3262 netdev_hold(dev, &po->prot_hook.dev_tracker, in packet_do_bind()
3264 po->prot_hook.dev = dev; in packet_do_bind()
3265 WRITE_ONCE(po->ifindex, dev ? dev->ifindex : 0); in packet_do_bind()
3274 if (!unlisted && (!dev || (dev->flags & IFF_UP))) { in packet_do_bind()
3277 sk->sk_err = ENETDOWN; in packet_do_bind()
3284 spin_unlock(&po->bind_lock); in packet_do_bind()
3296 struct sock *sk = sock->sk; in packet_bind_spkt()
3297 char name[sizeof(uaddr->sa_data_min) + 1]; in packet_bind_spkt()
3304 return -EINVAL; in packet_bind_spkt()
3305 /* uaddr->sa_data comes from the userspace, it's not guaranteed to be in packet_bind_spkt()
3306 * zero-terminated. in packet_bind_spkt()
3308 memcpy(name, uaddr->sa_data, sizeof(uaddr->sa_data_min)); in packet_bind_spkt()
3309 name[sizeof(uaddr->sa_data_min)] = 0; in packet_bind_spkt()
3317 struct sock *sk = sock->sk; in packet_bind()
3324 return -EINVAL; in packet_bind()
3325 if (sll->sll_family != AF_PACKET) in packet_bind()
3326 return -EINVAL; in packet_bind()
3328 return packet_do_bind(sk, NULL, sll->sll_ifindex, sll->sll_protocol); in packet_bind()
3349 if (!ns_capable(net->user_ns, CAP_NET_RAW)) in packet_create()
3350 return -EPERM; in packet_create()
3351 if (sock->type != SOCK_DGRAM && sock->type != SOCK_RAW && in packet_create()
3352 sock->type != SOCK_PACKET) in packet_create()
3353 return -ESOCKTNOSUPPORT; in packet_create()
3355 sock->state = SS_UNCONNECTED; in packet_create()
3357 err = -ENOBUFS; in packet_create()
3362 sock->ops = &packet_ops; in packet_create()
3363 if (sock->type == SOCK_PACKET) in packet_create()
3364 sock->ops = &packet_ops_spkt; in packet_create()
3369 init_completion(&po->skb_completion); in packet_create()
3370 sk->sk_family = PF_PACKET; in packet_create()
3371 po->num = proto; in packet_create()
3379 sk->sk_destruct = packet_sock_destruct; in packet_create()
3385 spin_lock_init(&po->bind_lock); in packet_create()
3386 mutex_init(&po->pg_vec_lock); in packet_create()
3387 po->rollover = NULL; in packet_create()
3388 po->prot_hook.func = packet_rcv; in packet_create()
3390 if (sock->type == SOCK_PACKET) in packet_create()
3391 po->prot_hook.func = packet_rcv_spkt; in packet_create()
3393 po->prot_hook.af_packet_priv = sk; in packet_create()
3394 po->prot_hook.af_packet_net = sock_net(sk); in packet_create()
3397 po->prot_hook.type = proto; in packet_create()
3401 mutex_lock(&net->packet.sklist_lock); in packet_create()
3402 sk_add_node_tail_rcu(sk, &net->packet.sklist); in packet_create()
3403 mutex_unlock(&net->packet.sklist_lock); in packet_create()
3422 struct sock *sk = sock->sk; in packet_recvmsg()
3425 int vnet_hdr_len = READ_ONCE(pkt_sk(sk)->vnet_hdr_sz); in packet_recvmsg()
3428 err = -EINVAL; in packet_recvmsg()
3434 if (pkt_sk(sk)->ifindex < 0) in packet_recvmsg()
3435 return -ENODEV; in packet_recvmsg()
3446 * of horrible races and re-entrancy so we can forget about it in packet_recvmsg()
3476 copied = skb->len; in packet_recvmsg()
3479 msg->msg_flags |= MSG_TRUNC; in packet_recvmsg()
3486 if (sock->type != SOCK_PACKET) { in packet_recvmsg()
3487 struct sockaddr_ll *sll = &PACKET_SKB_CB(skb)->sa.ll; in packet_recvmsg()
3490 origlen = PACKET_SKB_CB(skb)->sa.origlen; in packet_recvmsg()
3491 sll->sll_family = AF_PACKET; in packet_recvmsg()
3492 sll->sll_protocol = skb->protocol; in packet_recvmsg()
3497 if (msg->msg_name) { in packet_recvmsg()
3498 const size_t max_len = min(sizeof(skb->cb), in packet_recvmsg()
3505 if (sock->type == SOCK_PACKET) { in packet_recvmsg()
3507 msg->msg_namelen = sizeof(struct sockaddr_pkt); in packet_recvmsg()
3508 copy_len = msg->msg_namelen; in packet_recvmsg()
3510 struct sockaddr_ll *sll = &PACKET_SKB_CB(skb)->sa.ll; in packet_recvmsg()
3512 msg->msg_namelen = sll->sll_halen + in packet_recvmsg()
3514 copy_len = msg->msg_namelen; in packet_recvmsg()
3515 if (msg->msg_namelen < sizeof(struct sockaddr_ll)) { in packet_recvmsg()
3516 memset(msg->msg_name + in packet_recvmsg()
3518 0, sizeof(sll->sll_addr)); in packet_recvmsg()
3519 msg->msg_namelen = sizeof(struct sockaddr_ll); in packet_recvmsg()
3524 msg->msg_namelen = copy_len; in packet_recvmsg()
3526 memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa, copy_len); in packet_recvmsg()
3533 if (skb->ip_summed == CHECKSUM_PARTIAL) in packet_recvmsg()
3535 else if (skb->pkt_type != PACKET_OUTGOING && in packet_recvmsg()
3542 aux.tp_snaplen = skb->len; in packet_recvmsg()
3547 aux.tp_vlan_tpid = ntohs(skb->vlan_proto); in packet_recvmsg()
3558 * hides all the races and re-entrancy issues from us. in packet_recvmsg()
3560 err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied); in packet_recvmsg()
3572 struct sock *sk = sock->sk; in packet_getname_spkt()
3575 return -EOPNOTSUPP; in packet_getname_spkt()
3577 uaddr->sa_family = AF_PACKET; in packet_getname_spkt()
3578 memset(uaddr->sa_data, 0, sizeof(uaddr->sa_data_min)); in packet_getname_spkt()
3580 dev = dev_get_by_index_rcu(sock_net(sk), READ_ONCE(pkt_sk(sk)->ifindex)); in packet_getname_spkt()
3582 strscpy(uaddr->sa_data, dev->name, sizeof(uaddr->sa_data_min)); in packet_getname_spkt()
3592 struct sock *sk = sock->sk; in packet_getname()
3598 return -EOPNOTSUPP; in packet_getname()
3600 ifindex = READ_ONCE(po->ifindex); in packet_getname()
3601 sll->sll_family = AF_PACKET; in packet_getname()
3602 sll->sll_ifindex = ifindex; in packet_getname()
3603 sll->sll_protocol = READ_ONCE(po->num); in packet_getname()
3604 sll->sll_pkttype = 0; in packet_getname()
3608 sll->sll_hatype = dev->type; in packet_getname()
3609 sll->sll_halen = dev->addr_len; in packet_getname()
3612 memcpy(((struct sockaddr_storage *)sll)->__data + in packet_getname()
3613 offsetof(struct sockaddr_ll, sll_addr) - in packet_getname()
3615 dev->dev_addr, dev->addr_len); in packet_getname()
3617 sll->sll_hatype = 0; /* Bad: we have no ARPHRD_UNSPEC */ in packet_getname()
3618 sll->sll_halen = 0; in packet_getname()
3622 return offsetof(struct sockaddr_ll, sll_addr) + sll->sll_halen; in packet_getname()
3628 switch (i->type) { in packet_dev_mc()
3630 if (i->alen != dev->addr_len) in packet_dev_mc()
3631 return -EINVAL; in packet_dev_mc()
3633 return dev_mc_add(dev, i->addr); in packet_dev_mc()
3635 return dev_mc_del(dev, i->addr); in packet_dev_mc()
3642 if (i->alen != dev->addr_len) in packet_dev_mc()
3643 return -EINVAL; in packet_dev_mc()
3645 return dev_uc_add(dev, i->addr); in packet_dev_mc()
3647 return dev_uc_del(dev, i->addr); in packet_dev_mc()
3661 if (ml->ifindex == dev->ifindex) { in packet_dev_mclist_delete()
3662 packet_dev_mc(dev, ml, -1); in packet_dev_mclist_delete()
3663 *mlp = ml->next; in packet_dev_mclist_delete()
3666 mlp = &ml->next; in packet_dev_mclist_delete()
3679 err = -ENODEV; in packet_mc_add()
3680 dev = __dev_get_by_index(sock_net(sk), mreq->mr_ifindex); in packet_mc_add()
3684 err = -EINVAL; in packet_mc_add()
3685 if (mreq->mr_alen > dev->addr_len) in packet_mc_add()
3688 err = -ENOBUFS; in packet_mc_add()
3694 for (ml = po->mclist; ml; ml = ml->next) { in packet_mc_add()
3695 if (ml->ifindex == mreq->mr_ifindex && in packet_mc_add()
3696 ml->type == mreq->mr_type && in packet_mc_add()
3697 ml->alen == mreq->mr_alen && in packet_mc_add()
3698 memcmp(ml->addr, mreq->mr_address, ml->alen) == 0) { in packet_mc_add()
3699 ml->count++; in packet_mc_add()
3706 i->type = mreq->mr_type; in packet_mc_add()
3707 i->ifindex = mreq->mr_ifindex; in packet_mc_add()
3708 i->alen = mreq->mr_alen; in packet_mc_add()
3709 memcpy(i->addr, mreq->mr_address, i->alen); in packet_mc_add()
3710 memset(i->addr + i->alen, 0, sizeof(i->addr) - i->alen); in packet_mc_add()
3711 i->count = 1; in packet_mc_add()
3712 i->next = po->mclist; in packet_mc_add()
3713 po->mclist = i; in packet_mc_add()
3716 po->mclist = i->next; in packet_mc_add()
3731 for (mlp = &pkt_sk(sk)->mclist; (ml = *mlp) != NULL; mlp = &ml->next) { in packet_mc_drop()
3732 if (ml->ifindex == mreq->mr_ifindex && in packet_mc_drop()
3733 ml->type == mreq->mr_type && in packet_mc_drop()
3734 ml->alen == mreq->mr_alen && in packet_mc_drop()
3735 memcmp(ml->addr, mreq->mr_address, ml->alen) == 0) { in packet_mc_drop()
3736 if (--ml->count == 0) { in packet_mc_drop()
3738 *mlp = ml->next; in packet_mc_drop()
3739 dev = __dev_get_by_index(sock_net(sk), ml->ifindex); in packet_mc_drop()
3741 packet_dev_mc(dev, ml, -1); in packet_mc_drop()
3756 if (!po->mclist) in packet_flush_mclist()
3760 while ((ml = po->mclist) != NULL) { in packet_flush_mclist()
3763 po->mclist = ml->next; in packet_flush_mclist()
3764 dev = __dev_get_by_index(sock_net(sk), ml->ifindex); in packet_flush_mclist()
3766 packet_dev_mc(dev, ml, -1); in packet_flush_mclist()
3776 struct sock *sk = sock->sk; in packet_setsockopt()
3781 return -ENOPROTOOPT; in packet_setsockopt()
3791 return -EINVAL; in packet_setsockopt()
3795 return -EFAULT; in packet_setsockopt()
3797 return -EINVAL; in packet_setsockopt()
3812 switch (po->tp_version) { in packet_setsockopt()
3823 ret = -EINVAL; in packet_setsockopt()
3826 ret = -EFAULT; in packet_setsockopt()
3839 return -EINVAL; in packet_setsockopt()
3841 return -EFAULT; in packet_setsockopt()
3843 pkt_sk(sk)->copy_thresh = val; in packet_setsockopt()
3851 return -EINVAL; in packet_setsockopt()
3853 return -EFAULT; in packet_setsockopt()
3860 return -EINVAL; in packet_setsockopt()
3863 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3864 ret = -EBUSY; in packet_setsockopt()
3866 po->tp_version = val; in packet_setsockopt()
3877 return -EINVAL; in packet_setsockopt()
3879 return -EFAULT; in packet_setsockopt()
3881 return -EINVAL; in packet_setsockopt()
3883 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3884 ret = -EBUSY; in packet_setsockopt()
3886 po->tp_reserve = val; in packet_setsockopt()
3897 return -EINVAL; in packet_setsockopt()
3899 return -EFAULT; in packet_setsockopt()
3902 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3903 ret = -EBUSY; in packet_setsockopt()
3916 return -EINVAL; in packet_setsockopt()
3918 return -EFAULT; in packet_setsockopt()
3928 return -EINVAL; in packet_setsockopt()
3930 return -EFAULT; in packet_setsockopt()
3940 if (sock->type != SOCK_RAW) in packet_setsockopt()
3941 return -EINVAL; in packet_setsockopt()
3943 return -EINVAL; in packet_setsockopt()
3945 return -EFAULT; in packet_setsockopt()
3950 return -EINVAL; in packet_setsockopt()
3956 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3957 ret = -EBUSY; in packet_setsockopt()
3959 WRITE_ONCE(po->vnet_hdr_sz, hdr_len); in packet_setsockopt()
3970 return -EINVAL; in packet_setsockopt()
3972 return -EFAULT; in packet_setsockopt()
3974 WRITE_ONCE(po->tp_tstamp, val); in packet_setsockopt()
3982 return -EINVAL; in packet_setsockopt()
3984 return -EFAULT; in packet_setsockopt()
3991 if (!READ_ONCE(po->fanout)) in packet_setsockopt()
3992 return -EINVAL; in packet_setsockopt()
4001 return -EINVAL; in packet_setsockopt()
4003 return -EFAULT; in packet_setsockopt()
4005 return -EINVAL; in packet_setsockopt()
4007 po->prot_hook.ignore_outgoing = !!val; in packet_setsockopt()
4015 return -EINVAL; in packet_setsockopt()
4017 return -EFAULT; in packet_setsockopt()
4020 if (!po->rx_ring.pg_vec && !po->tx_ring.pg_vec) in packet_setsockopt()
4031 return -EINVAL; in packet_setsockopt()
4033 return -EFAULT; in packet_setsockopt()
4039 return -ENOPROTOOPT; in packet_setsockopt()
4048 struct sock *sk = sock->sk; in packet_getsockopt()
4056 return -ENOPROTOOPT; in packet_getsockopt()
4059 return -EFAULT; in packet_getsockopt()
4062 return -EINVAL; in packet_getsockopt()
4066 spin_lock_bh(&sk->sk_receive_queue.lock); in packet_getsockopt()
4067 memcpy(&st, &po->stats, sizeof(st)); in packet_getsockopt()
4068 memset(&po->stats, 0, sizeof(po->stats)); in packet_getsockopt()
4069 spin_unlock_bh(&sk->sk_receive_queue.lock); in packet_getsockopt()
4070 drops = atomic_xchg(&po->tp_drops, 0); in packet_getsockopt()
4072 if (po->tp_version == TPACKET_V3) { in packet_getsockopt()
4092 val = !!READ_ONCE(po->vnet_hdr_sz); in packet_getsockopt()
4095 val = READ_ONCE(po->vnet_hdr_sz); in packet_getsockopt()
4098 val = po->tp_version; in packet_getsockopt()
4104 return -EINVAL; in packet_getsockopt()
4106 return -EFAULT; in packet_getsockopt()
4118 return -EINVAL; in packet_getsockopt()
4122 val = po->tp_reserve; in packet_getsockopt()
4128 val = READ_ONCE(po->tp_tstamp); in packet_getsockopt()
4131 val = (po->fanout ? in packet_getsockopt()
4132 ((u32)po->fanout->id | in packet_getsockopt()
4133 ((u32)po->fanout->type << 16) | in packet_getsockopt()
4134 ((u32)po->fanout->flags << 24)) : in packet_getsockopt()
4138 val = po->prot_hook.ignore_outgoing; in packet_getsockopt()
4141 if (!po->rollover) in packet_getsockopt()
4142 return -EINVAL; in packet_getsockopt()
4143 rstats.tp_all = atomic_long_read(&po->rollover->num); in packet_getsockopt()
4144 rstats.tp_huge = atomic_long_read(&po->rollover->num_huge); in packet_getsockopt()
4145 rstats.tp_failed = atomic_long_read(&po->rollover->num_failed); in packet_getsockopt()
4156 return -ENOPROTOOPT; in packet_getsockopt()
4162 return -EFAULT; in packet_getsockopt()
4164 return -EFAULT; in packet_getsockopt()
4176 sk_for_each_rcu(sk, &net->packet.sklist) { in packet_notifier()
4181 if (po->mclist) in packet_notifier()
4182 packet_dev_mclist_delete(dev, &po->mclist); in packet_notifier()
4186 if (dev->ifindex == po->ifindex) { in packet_notifier()
4187 spin_lock(&po->bind_lock); in packet_notifier()
4190 sk->sk_err = ENETDOWN; in packet_notifier()
4196 WRITE_ONCE(po->ifindex, -1); in packet_notifier()
4197 netdev_put(po->prot_hook.dev, in packet_notifier()
4198 &po->prot_hook.dev_tracker); in packet_notifier()
4199 po->prot_hook.dev = NULL; in packet_notifier()
4201 spin_unlock(&po->bind_lock); in packet_notifier()
4205 if (dev->ifindex == po->ifindex) { in packet_notifier()
4206 spin_lock(&po->bind_lock); in packet_notifier()
4207 if (po->num) in packet_notifier()
4209 spin_unlock(&po->bind_lock); in packet_notifier()
4222 struct sock *sk = sock->sk; in packet_ioctl()
4236 spin_lock_bh(&sk->sk_receive_queue.lock); in packet_ioctl()
4237 skb = skb_peek(&sk->sk_receive_queue); in packet_ioctl()
4239 amount = skb->len; in packet_ioctl()
4240 spin_unlock_bh(&sk->sk_receive_queue.lock); in packet_ioctl()
4262 return -ENOIOCTLCMD; in packet_ioctl()
4270 struct sock *sk = sock->sk; in packet_poll()
4274 spin_lock_bh(&sk->sk_receive_queue.lock); in packet_poll()
4275 if (po->rx_ring.pg_vec) { in packet_poll()
4276 if (!packet_previous_rx_frame(po, &po->rx_ring, in packet_poll()
4281 spin_unlock_bh(&sk->sk_receive_queue.lock); in packet_poll()
4282 spin_lock_bh(&sk->sk_write_queue.lock); in packet_poll()
4283 if (po->tx_ring.pg_vec) { in packet_poll()
4284 if (packet_current_frame(po, &po->tx_ring, TP_STATUS_AVAILABLE)) in packet_poll()
4287 spin_unlock_bh(&sk->sk_write_queue.lock); in packet_poll()
4298 struct file *file = vma->vm_file; in packet_mm_open()
4299 struct socket *sock = file->private_data; in packet_mm_open()
4300 struct sock *sk = sock->sk; in packet_mm_open()
4303 atomic_long_inc(&pkt_sk(sk)->mapped); in packet_mm_open()
4308 struct file *file = vma->vm_file; in packet_mm_close()
4309 struct socket *sock = file->private_data; in packet_mm_close()
4310 struct sock *sk = sock->sk; in packet_mm_close()
4313 atomic_long_dec(&pkt_sk(sk)->mapped); in packet_mm_close()
4366 unsigned int block_nr = req->tp_block_nr; in alloc_pg_vec()
4401 struct tpacket_req *req = &req_u->req; in packet_set_ring()
4403 rb = tx_ring ? &po->tx_ring : &po->rx_ring; in packet_set_ring()
4404 rb_queue = tx_ring ? &sk->sk_write_queue : &sk->sk_receive_queue; in packet_set_ring()
4406 err = -EBUSY; in packet_set_ring()
4408 if (atomic_long_read(&po->mapped)) in packet_set_ring()
4414 if (req->tp_block_nr) { in packet_set_ring()
4418 err = -EBUSY; in packet_set_ring()
4419 if (unlikely(rb->pg_vec)) in packet_set_ring()
4422 switch (po->tp_version) { in packet_set_ring()
4424 po->tp_hdrlen = TPACKET_HDRLEN; in packet_set_ring()
4427 po->tp_hdrlen = TPACKET2_HDRLEN; in packet_set_ring()
4430 po->tp_hdrlen = TPACKET3_HDRLEN; in packet_set_ring()
4434 err = -EINVAL; in packet_set_ring()
4435 if (unlikely((int)req->tp_block_size <= 0)) in packet_set_ring()
4437 if (unlikely(!PAGE_ALIGNED(req->tp_block_size))) in packet_set_ring()
4439 min_frame_size = po->tp_hdrlen + po->tp_reserve; in packet_set_ring()
4440 if (po->tp_version >= TPACKET_V3 && in packet_set_ring()
4441 req->tp_block_size < in packet_set_ring()
4442 BLK_PLUS_PRIV((u64)req_u->req3.tp_sizeof_priv) + min_frame_size) in packet_set_ring()
4444 if (unlikely(req->tp_frame_size < min_frame_size)) in packet_set_ring()
4446 if (unlikely(req->tp_frame_size & (TPACKET_ALIGNMENT - 1))) in packet_set_ring()
4449 rb->frames_per_block = req->tp_block_size / req->tp_frame_size; in packet_set_ring()
4450 if (unlikely(rb->frames_per_block == 0)) in packet_set_ring()
4452 if (unlikely(rb->frames_per_block > UINT_MAX / req->tp_block_nr)) in packet_set_ring()
4454 if (unlikely((rb->frames_per_block * req->tp_block_nr) != in packet_set_ring()
4455 req->tp_frame_nr)) in packet_set_ring()
4458 err = -ENOMEM; in packet_set_ring()
4459 order = get_order(req->tp_block_size); in packet_set_ring()
4463 switch (po->tp_version) { in packet_set_ring()
4469 struct tpacket_req3 *req3 = &req_u->req3; in packet_set_ring()
4471 if (req3->tp_retire_blk_tov || in packet_set_ring()
4472 req3->tp_sizeof_priv || in packet_set_ring()
4473 req3->tp_feature_req_word) { in packet_set_ring()
4474 err = -EINVAL; in packet_set_ring()
4481 rx_owner_map = bitmap_alloc(req->tp_frame_nr, in packet_set_ring()
4491 err = -EINVAL; in packet_set_ring()
4492 if (unlikely(req->tp_frame_nr)) in packet_set_ring()
4498 spin_lock(&po->bind_lock); in packet_set_ring()
4500 num = po->num; in packet_set_ring()
4502 WRITE_ONCE(po->num, 0); in packet_set_ring()
4505 spin_unlock(&po->bind_lock); in packet_set_ring()
4509 err = -EBUSY; in packet_set_ring()
4510 mutex_lock(&po->pg_vec_lock); in packet_set_ring()
4511 if (closing || atomic_long_read(&po->mapped) == 0) { in packet_set_ring()
4513 spin_lock_bh(&rb_queue->lock); in packet_set_ring()
4514 swap(rb->pg_vec, pg_vec); in packet_set_ring()
4515 if (po->tp_version <= TPACKET_V2) in packet_set_ring()
4516 swap(rb->rx_owner_map, rx_owner_map); in packet_set_ring()
4517 rb->frame_max = (req->tp_frame_nr - 1); in packet_set_ring()
4518 rb->head = 0; in packet_set_ring()
4519 rb->frame_size = req->tp_frame_size; in packet_set_ring()
4520 spin_unlock_bh(&rb_queue->lock); in packet_set_ring()
4522 swap(rb->pg_vec_order, order); in packet_set_ring()
4523 swap(rb->pg_vec_len, req->tp_block_nr); in packet_set_ring()
4525 rb->pg_vec_pages = req->tp_block_size/PAGE_SIZE; in packet_set_ring()
4526 po->prot_hook.func = (po->rx_ring.pg_vec) ? in packet_set_ring()
4529 if (atomic_long_read(&po->mapped)) in packet_set_ring()
4531 atomic_long_read(&po->mapped)); in packet_set_ring()
4533 mutex_unlock(&po->pg_vec_lock); in packet_set_ring()
4535 spin_lock(&po->bind_lock); in packet_set_ring()
4537 WRITE_ONCE(po->num, num); in packet_set_ring()
4540 spin_unlock(&po->bind_lock); in packet_set_ring()
4541 if (pg_vec && (po->tp_version > TPACKET_V2)) { in packet_set_ring()
4542 /* Because we don't support block-based V3 on tx-ring */ in packet_set_ring()
4550 free_pg_vec(pg_vec, order, req->tp_block_nr); in packet_set_ring()
4559 struct sock *sk = sock->sk; in packet_mmap()
4564 int err = -EINVAL; in packet_mmap()
4567 if (vma->vm_pgoff) in packet_mmap()
4568 return -EINVAL; in packet_mmap()
4570 mutex_lock(&po->pg_vec_lock); in packet_mmap()
4573 for (rb = &po->rx_ring; rb <= &po->tx_ring; rb++) { in packet_mmap()
4574 if (rb->pg_vec) { in packet_mmap()
4575 expected_size += rb->pg_vec_len in packet_mmap()
4576 * rb->pg_vec_pages in packet_mmap()
4584 size = vma->vm_end - vma->vm_start; in packet_mmap()
4588 start = vma->vm_start; in packet_mmap()
4589 for (rb = &po->rx_ring; rb <= &po->tx_ring; rb++) { in packet_mmap()
4590 if (rb->pg_vec == NULL) in packet_mmap()
4593 for (i = 0; i < rb->pg_vec_len; i++) { in packet_mmap()
4595 void *kaddr = rb->pg_vec[i].buffer; in packet_mmap()
4598 for (pg_num = 0; pg_num < rb->pg_vec_pages; pg_num++) { in packet_mmap()
4609 atomic_long_inc(&po->mapped); in packet_mmap()
4610 vma->vm_ops = &packet_mmap_ops; in packet_mmap()
4614 mutex_unlock(&po->pg_vec_lock); in packet_mmap()
4676 return seq_hlist_start_head_rcu(&net->packet.sklist, *pos); in packet_seq_start()
4682 return seq_hlist_next_rcu(v, &net->packet.sklist, pos); in packet_seq_next()
4696 IS_ENABLED(CONFIG_64BIT) ? -17 : -9, "sk"); in packet_seq_show()
4702 "%pK %-6d %-4d %04x %-5d %1d %-6u %-6u %-6lu\n", in packet_seq_show()
4704 refcount_read(&s->sk_refcnt), in packet_seq_show()
4705 s->sk_type, in packet_seq_show()
4706 ntohs(READ_ONCE(po->num)), in packet_seq_show()
4707 READ_ONCE(po->ifindex), in packet_seq_show()
4709 atomic_read(&s->sk_rmem_alloc), in packet_seq_show()
4727 mutex_init(&net->packet.sklist_lock); in packet_net_init()
4728 INIT_HLIST_HEAD(&net->packet.sklist); in packet_net_init()
4731 if (!proc_create_net("packet", 0, net->proc_net, &packet_seq_ops, in packet_net_init()
4733 return -ENOMEM; in packet_net_init()
4741 remove_proc_entry("packet", net->proc_net); in packet_net_exit()
4742 WARN_ON_ONCE(!hlist_empty(&net->packet.sklist)); in packet_net_exit()