Lines Matching +full:no +full:- +full:read +full:- +full:rollover
6 * PACKET - implements raw packet sockets.
14 * Alan Cox : new skbuff lists, look ma no backlogs!
17 * added. Also fixed the peek/read crash
21 * Alan Cox : Re-commented the code.
26 * dubious gcc output. Can you read
29 * Alan Cox : New buffers. Use sk->mac.raw.
102 - if device has no dev->hard_header routine, it adds and removes ll header
104 but higher levels still should reserve dev->hard_header_len.
108 - packet socket receives packets with pulled ll header,
112 -----------
114 Incoming, dev->hard_header!=NULL
115 mac_header -> ll header
116 data -> data
118 Outgoing, dev->hard_header!=NULL
119 mac_header -> ll header
120 data -> ll header
122 Incoming, dev->hard_header==NULL
123 mac_header -> UNKNOWN position. It is very likely, that it points to ll
126 data -> data
128 Outgoing, dev->hard_header==NULL
129 mac_header -> data. ll header is still not built!
130 data -> data
133 If dev->hard_header==NULL we are unlikely to restore sensible ll header.
137 ------------
139 dev->hard_header != NULL
140 mac_header -> ll header
141 data -> ll header
143 dev->hard_header == NULL (ll header is added by device, we cannot control it)
144 mac_header -> data
145 data -> data
180 #define BLOCK_STATUS(x) ((x)->hdr.bh1.block_status)
181 #define BLOCK_NUM_PKTS(x) ((x)->hdr.bh1.num_pkts)
182 #define BLOCK_O2FP(x) ((x)->hdr.bh1.offset_to_first_pkt)
183 #define BLOCK_LEN(x) ((x)->hdr.bh1.blk_len)
184 #define BLOCK_SNUM(x) ((x)->hdr.bh1.seq_num)
185 #define BLOCK_O2PRIV(x) ((x)->offset_to_priv)
230 #define PACKET_SKB_CB(__skb) ((struct packet_skb_cb *)((__skb)->cb))
232 #define GET_PBDQC_FROM_RB(x) ((struct tpacket_kbdq_core *)(&(x)->prb_bdqc))
234 ((struct tpacket_block_desc *)((x)->pkbdq[(bid)].buffer))
236 ((struct tpacket_block_desc *)((x)->pkbdq[(x)->kactive_blk_num].buffer))
238 (((x)->kactive_blk_num < ((x)->knum_blocks-1)) ? \
239 ((x)->kactive_blk_num+1) : 0)
254 dev = rcu_dereference(po->cached_dev); in packet_cached_dev_get()
265 rcu_assign_pointer(po->cached_dev, dev); in packet_cached_dev_assign()
270 RCU_INIT_POINTER(po->cached_dev, NULL); in packet_cached_dev_reset()
275 return po->xmit == packet_direct_xmit; in packet_use_direct_xmit()
286 struct net_device *dev = skb->dev; in packet_pick_tx_queue()
287 const struct net_device_ops *ops = dev->netdev_ops; in packet_pick_tx_queue()
290 if (ops->ndo_select_queue) { in packet_pick_tx_queue()
291 queue_index = ops->ndo_select_queue(dev, skb, NULL, in packet_pick_tx_queue()
309 if (!po->running) { in __register_prot_hook()
310 if (po->fanout) in __register_prot_hook()
313 dev_add_pack(&po->prot_hook); in __register_prot_hook()
316 po->running = 1; in __register_prot_hook()
322 lockdep_assert_held_once(&pkt_sk(sk)->bind_lock); in register_prot_hook()
327 * the po->bind_lock and do a synchronize_net to make sure no
329 * of po->prot_hook. If the sync parameter is false, it is the
336 lockdep_assert_held_once(&po->bind_lock); in __unregister_prot_hook()
338 po->running = 0; in __unregister_prot_hook()
340 if (po->fanout) in __unregister_prot_hook()
343 __dev_remove_pack(&po->prot_hook); in __unregister_prot_hook()
348 spin_unlock(&po->bind_lock); in __unregister_prot_hook()
350 spin_lock(&po->bind_lock); in __unregister_prot_hook()
358 if (po->running) in unregister_prot_hook()
374 switch (po->tp_version) { in __packet_set_status()
376 h.h1->tp_status = status; in __packet_set_status()
377 flush_dcache_page(pgv_to_page(&h.h1->tp_status)); in __packet_set_status()
380 h.h2->tp_status = status; in __packet_set_status()
381 flush_dcache_page(pgv_to_page(&h.h2->tp_status)); in __packet_set_status()
384 h.h3->tp_status = status; in __packet_set_status()
385 flush_dcache_page(pgv_to_page(&h.h3->tp_status)); in __packet_set_status()
402 switch (po->tp_version) { in __packet_get_status()
404 flush_dcache_page(pgv_to_page(&h.h1->tp_status)); in __packet_get_status()
405 return h.h1->tp_status; in __packet_get_status()
407 flush_dcache_page(pgv_to_page(&h.h2->tp_status)); in __packet_get_status()
408 return h.h2->tp_status; in __packet_get_status()
410 flush_dcache_page(pgv_to_page(&h.h3->tp_status)); in __packet_get_status()
411 return h.h3->tp_status; in __packet_get_status()
426 ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts)) in tpacket_get_timestamp()
429 if (ktime_to_timespec_cond(skb->tstamp, ts)) in tpacket_get_timestamp()
442 if (!(ts_status = tpacket_get_timestamp(skb, &ts, po->tp_tstamp))) in __packet_set_timestamp()
446 switch (po->tp_version) { in __packet_set_timestamp()
448 h.h1->tp_sec = ts.tv_sec; in __packet_set_timestamp()
449 h.h1->tp_usec = ts.tv_nsec / NSEC_PER_USEC; in __packet_set_timestamp()
452 h.h2->tp_sec = ts.tv_sec; in __packet_set_timestamp()
453 h.h2->tp_nsec = ts.tv_nsec; in __packet_set_timestamp()
456 h.h3->tp_sec = ts.tv_sec; in __packet_set_timestamp()
457 h.h3->tp_nsec = ts.tv_nsec; in __packet_set_timestamp()
465 flush_dcache_page(pgv_to_page(&h.h1->tp_sec)); in __packet_set_timestamp()
479 pg_vec_pos = position / rb->frames_per_block; in packet_lookup_frame()
480 frame_offset = position % rb->frames_per_block; in packet_lookup_frame()
482 h.raw = rb->pg_vec[pg_vec_pos].buffer + in packet_lookup_frame()
483 (frame_offset * rb->frame_size); in packet_lookup_frame()
495 return packet_lookup_frame(po, rb, rb->head, status); in packet_current_frame()
500 del_timer_sync(&pkc->retire_blk_timer); in prb_del_retire_blk_timer()
508 pkc = GET_PBDQC_FROM_RB(&po->rx_ring); in prb_shutdown_retire_blk_timer()
510 spin_lock_bh(&rb_queue->lock); in prb_shutdown_retire_blk_timer()
511 pkc->delete_blk_timer = 1; in prb_shutdown_retire_blk_timer()
512 spin_unlock_bh(&rb_queue->lock); in prb_shutdown_retire_blk_timer()
521 pkc = GET_PBDQC_FROM_RB(&po->rx_ring); in prb_setup_retire_blk_timer()
522 timer_setup(&pkc->retire_blk_timer, prb_retire_rx_blk_timer_expired, in prb_setup_retire_blk_timer()
524 pkc->retire_blk_timer.expires = jiffies; in prb_setup_retire_blk_timer()
536 dev = __dev_get_by_index(sock_net(&po->sk), po->ifindex); in prb_calc_retire_blk_tmo()
573 p1->feature_req_word = req_u->req3.tp_feature_req_word; in prb_init_ft_ops()
586 p1->knxt_seq_num = 1; in init_prb_bdqc()
587 p1->pkbdq = pg_vec; in init_prb_bdqc()
589 p1->pkblk_start = pg_vec[0].buffer; in init_prb_bdqc()
590 p1->kblk_size = req_u->req3.tp_block_size; in init_prb_bdqc()
591 p1->knum_blocks = req_u->req3.tp_block_nr; in init_prb_bdqc()
592 p1->hdrlen = po->tp_hdrlen; in init_prb_bdqc()
593 p1->version = po->tp_version; in init_prb_bdqc()
594 p1->last_kactive_blk_num = 0; in init_prb_bdqc()
595 po->stats.stats3.tp_freeze_q_cnt = 0; in init_prb_bdqc()
596 if (req_u->req3.tp_retire_blk_tov) in init_prb_bdqc()
597 p1->retire_blk_tov = req_u->req3.tp_retire_blk_tov; in init_prb_bdqc()
599 p1->retire_blk_tov = prb_calc_retire_blk_tmo(po, in init_prb_bdqc()
600 req_u->req3.tp_block_size); in init_prb_bdqc()
601 p1->tov_in_jiffies = msecs_to_jiffies(p1->retire_blk_tov); in init_prb_bdqc()
602 p1->blk_sizeof_priv = req_u->req3.tp_sizeof_priv; in init_prb_bdqc()
604 p1->max_frame_len = p1->kblk_size - BLK_PLUS_PRIV(p1->blk_sizeof_priv); in init_prb_bdqc()
615 mod_timer(&pkc->retire_blk_timer, in _prb_refresh_rx_retire_blk_timer()
616 jiffies + pkc->tov_in_jiffies); in _prb_refresh_rx_retire_blk_timer()
617 pkc->last_kactive_blk_num = pkc->kactive_blk_num; in _prb_refresh_rx_retire_blk_timer()
624 * on packet-by-packet basis.
626 * With a 1MB block-size, on a 1Gbps line, it will take
639 * a) line-speed and b) block-size.
647 struct tpacket_kbdq_core *pkc = GET_PBDQC_FROM_RB(&po->rx_ring); in prb_retire_rx_blk_timer_expired()
651 spin_lock(&po->sk.sk_receive_queue.lock); in prb_retire_rx_blk_timer_expired()
656 if (unlikely(pkc->delete_blk_timer)) in prb_retire_rx_blk_timer_expired()
669 while (atomic_read(&pkc->blk_fill_in_prog)) { in prb_retire_rx_blk_timer_expired()
675 if (pkc->last_kactive_blk_num == pkc->kactive_blk_num) { in prb_retire_rx_blk_timer_expired()
687 /* Case 1. Queue was frozen because user-space was in prb_retire_rx_blk_timer_expired()
692 * Ok, user-space is still behind. in prb_retire_rx_blk_timer_expired()
697 /* Case 2. queue was frozen,user-space caught up, in prb_retire_rx_blk_timer_expired()
702 * Thawing/timer-refresh is a side effect. in prb_retire_rx_blk_timer_expired()
714 spin_unlock(&po->sk.sk_receive_queue.lock); in prb_retire_rx_blk_timer_expired()
730 end = (u8 *)PAGE_ALIGN((unsigned long)pkc1->pkblk_end); in prb_flush_block()
767 struct tpacket_hdr_v1 *h1 = &pbd1->hdr.bh1; in prb_close_block()
768 struct sock *sk = &po->sk; in prb_close_block()
770 if (atomic_read(&po->tp_drops)) in prb_close_block()
773 last_pkt = (struct tpacket3_hdr *)pkc1->prev; in prb_close_block()
774 last_pkt->tp_next_offset = 0; in prb_close_block()
778 h1->ts_last_pkt.ts_sec = last_pkt->tp_sec; in prb_close_block()
779 h1->ts_last_pkt.ts_nsec = last_pkt->tp_nsec; in prb_close_block()
781 /* Ok, we tmo'd - so get the current time. in prb_close_block()
788 h1->ts_last_pkt.ts_sec = ts.tv_sec; in prb_close_block()
789 h1->ts_last_pkt.ts_nsec = ts.tv_nsec; in prb_close_block()
797 sk->sk_data_ready(sk); in prb_close_block()
799 pkc1->kactive_blk_num = GET_NEXT_PRB_BLK_NUM(pkc1); in prb_close_block()
804 pkc->reset_pending_on_curr_blk = 0; in prb_thaw_queue()
818 struct tpacket_hdr_v1 *h1 = &pbd1->hdr.bh1; in prb_open_block()
826 BLOCK_SNUM(pbd1) = pkc1->knxt_seq_num++; in prb_open_block()
828 BLOCK_LEN(pbd1) = BLK_PLUS_PRIV(pkc1->blk_sizeof_priv); in prb_open_block()
832 h1->ts_first_pkt.ts_sec = ts.tv_sec; in prb_open_block()
833 h1->ts_first_pkt.ts_nsec = ts.tv_nsec; in prb_open_block()
835 pkc1->pkblk_start = (char *)pbd1; in prb_open_block()
836 pkc1->nxt_offset = pkc1->pkblk_start + BLK_PLUS_PRIV(pkc1->blk_sizeof_priv); in prb_open_block()
838 BLOCK_O2FP(pbd1) = (__u32)BLK_PLUS_PRIV(pkc1->blk_sizeof_priv); in prb_open_block()
841 pbd1->version = pkc1->version; in prb_open_block()
842 pkc1->prev = pkc1->nxt_offset; in prb_open_block()
843 pkc1->pkblk_end = pkc1->pkblk_start + pkc1->kblk_size; in prb_open_block()
856 * 4) user-space is either sleeping or processing block '0'.
857 * 5) tpacket_rcv is currently filling block '7', since there is no space left,
858 * it will close block-7,loop around and try to fill block '0'.
859 * call-flow:
863 * |->(BLOCK_STATUS == USER) evaluates to true
864 * 5.1) Since block-0 is currently in-use, we just freeze the queue.
869 * re-open block-0 in near future.
871 * case and __packet_lookup_frame_in_block will check if block-0
872 * is free and can now be re-used.
877 pkc->reset_pending_on_curr_blk = 1; in prb_freeze_queue()
878 po->stats.stats3.tp_freeze_q_cnt++; in prb_freeze_queue()
911 return (void *)pkc->nxt_offset; in prb_dispatch_next_block()
923 * cpu-0 and tpacket_rcv() got invoked on cpu-1, didn't in prb_retire_current_block()
928 * the timer-handler already handled this case. in prb_retire_current_block()
931 while (atomic_read(&pkc->blk_fill_in_prog)) { in prb_retire_current_block()
948 return pkc->reset_pending_on_curr_blk; in prb_queue_frozen()
952 __releases(&pkc->blk_fill_in_prog_lock) in prb_clear_blk_fill_status()
955 atomic_dec(&pkc->blk_fill_in_prog); in prb_clear_blk_fill_status()
961 ppd->hv1.tp_rxhash = skb_get_hash(pkc->skb); in prb_fill_rxhash()
967 ppd->hv1.tp_rxhash = 0; in prb_clear_rxhash()
973 if (skb_vlan_tag_present(pkc->skb)) { in prb_fill_vlan_info()
974 ppd->hv1.tp_vlan_tci = skb_vlan_tag_get(pkc->skb); in prb_fill_vlan_info()
975 ppd->hv1.tp_vlan_tpid = ntohs(pkc->skb->vlan_proto); in prb_fill_vlan_info()
976 ppd->tp_status = TP_STATUS_VLAN_VALID | TP_STATUS_VLAN_TPID_VALID; in prb_fill_vlan_info()
978 ppd->hv1.tp_vlan_tci = 0; in prb_fill_vlan_info()
979 ppd->hv1.tp_vlan_tpid = 0; in prb_fill_vlan_info()
980 ppd->tp_status = TP_STATUS_AVAILABLE; in prb_fill_vlan_info()
987 ppd->hv1.tp_padding = 0; in prb_run_all_ft_ops()
990 if (pkc->feature_req_word & TP_FT_REQ_FILL_RXHASH) in prb_run_all_ft_ops()
1000 __acquires(&pkc->blk_fill_in_prog_lock) in prb_fill_curr_block()
1005 ppd->tp_next_offset = TOTAL_PKT_LEN_INCL_ALIGN(len); in prb_fill_curr_block()
1006 pkc->prev = curr; in prb_fill_curr_block()
1007 pkc->nxt_offset += TOTAL_PKT_LEN_INCL_ALIGN(len); in prb_fill_curr_block()
1010 atomic_inc(&pkc->blk_fill_in_prog); in prb_fill_curr_block()
1014 /* Assumes caller has the sk->rx_queue.lock */
1025 pkc = GET_PBDQC_FROM_RB(&po->rx_ring); in __packet_lookup_frame_in_block()
1032 * is still in_use by user-space. in __packet_lookup_frame_in_block()
1039 * Ok, the block was released by user-space. in __packet_lookup_frame_in_block()
1049 curr = pkc->nxt_offset; in __packet_lookup_frame_in_block()
1050 pkc->skb = skb; in __packet_lookup_frame_in_block()
1051 end = (char *)pbd + pkc->kblk_size; in __packet_lookup_frame_in_block()
1071 * No free blocks are available.user_space hasn't caught up yet. in __packet_lookup_frame_in_block()
1082 switch (po->tp_version) { in packet_current_rx_frame()
1085 curr = packet_lookup_frame(po, &po->rx_ring, in packet_current_rx_frame()
1086 po->rx_ring.head, status); in packet_current_rx_frame()
1113 if (rb->prb_bdqc.kactive_blk_num) in prb_previous_blk_num()
1114 prev = rb->prb_bdqc.kactive_blk_num-1; in prb_previous_blk_num()
1116 prev = rb->prb_bdqc.knum_blocks-1; in prb_previous_blk_num()
1133 if (po->tp_version <= TPACKET_V2) in packet_previous_rx_frame()
1142 switch (po->tp_version) { in packet_increment_rx_head()
1158 unsigned int previous = rb->head ? rb->head - 1 : rb->frame_max; in packet_previous_frame()
1164 buff->head = buff->head != buff->frame_max ? buff->head+1 : 0; in packet_increment_head()
1169 this_cpu_inc(*rb->pending_refcnt); in packet_inc_pending()
1174 this_cpu_dec(*rb->pending_refcnt); in packet_dec_pending()
1183 if (rb->pending_refcnt == NULL) in packet_read_pending()
1187 refcnt += *per_cpu_ptr(rb->pending_refcnt, cpu); in packet_read_pending()
1194 po->rx_ring.pending_refcnt = NULL; in packet_alloc_pending()
1196 po->tx_ring.pending_refcnt = alloc_percpu(unsigned int); in packet_alloc_pending()
1197 if (unlikely(po->tx_ring.pending_refcnt == NULL)) in packet_alloc_pending()
1198 return -ENOBUFS; in packet_alloc_pending()
1205 free_percpu(po->tx_ring.pending_refcnt); in packet_free_pending()
1217 len = po->rx_ring.frame_max + 1; in __tpacket_has_room()
1218 idx = po->rx_ring.head; in __tpacket_has_room()
1222 idx -= len; in __tpacket_has_room()
1223 return packet_lookup_frame(po, &po->rx_ring, idx, TP_STATUS_KERNEL); in __tpacket_has_room()
1230 len = po->rx_ring.prb_bdqc.knum_blocks; in __tpacket_v3_has_room()
1231 idx = po->rx_ring.prb_bdqc.kactive_blk_num; in __tpacket_v3_has_room()
1235 idx -= len; in __tpacket_v3_has_room()
1236 return prb_lookup_block(po, &po->rx_ring, idx, TP_STATUS_KERNEL); in __tpacket_v3_has_room()
1241 struct sock *sk = &po->sk; in __packet_rcv_has_room()
1244 if (po->prot_hook.func != tpacket_rcv) { in __packet_rcv_has_room()
1245 int avail = sk->sk_rcvbuf - atomic_read(&sk->sk_rmem_alloc) in __packet_rcv_has_room()
1246 - (skb ? skb->truesize : 0); in __packet_rcv_has_room()
1247 if (avail > (sk->sk_rcvbuf >> ROOM_POW_OFF)) in __packet_rcv_has_room()
1255 if (po->tp_version == TPACKET_V3) { in __packet_rcv_has_room()
1275 spin_lock_bh(&po->sk.sk_receive_queue.lock); in packet_rcv_has_room()
1278 if (po->pressure == has_room) in packet_rcv_has_room()
1279 po->pressure = !has_room; in packet_rcv_has_room()
1280 spin_unlock_bh(&po->sk.sk_receive_queue.lock); in packet_rcv_has_room()
1287 skb_queue_purge(&sk->sk_error_queue); in packet_sock_destruct()
1289 WARN_ON(atomic_read(&sk->sk_rmem_alloc)); in packet_sock_destruct()
1290 WARN_ON(refcount_read(&sk->sk_wmem_alloc)); in packet_sock_destruct()
1302 u32 *history = po->rollover->history; in fanout_flow_is_huge()
1331 unsigned int val = atomic_inc_return(&f->rr_cur); in fanout_demux_lb()
1358 po = pkt_sk(f->arr[idx]); in fanout_demux_rollover()
1368 i = j = min_t(int, po->rollover->sock, num - 1); in fanout_demux_rollover()
1370 po_next = pkt_sk(f->arr[i]); in fanout_demux_rollover()
1371 if (po_next != po_skip && !po_next->pressure && in fanout_demux_rollover()
1374 po->rollover->sock = i; in fanout_demux_rollover()
1375 atomic_long_inc(&po->rollover->num); in fanout_demux_rollover()
1377 atomic_long_inc(&po->rollover->num_huge); in fanout_demux_rollover()
1385 atomic_long_inc(&po->rollover->num_failed); in fanout_demux_rollover()
1404 prog = rcu_dereference(f->bpf_prog); in fanout_demux_bpf()
1414 return f->flags & (flag >> 8); in fanout_has_flag()
1420 struct packet_fanout *f = pt->af_packet_priv; in packet_rcv_fanout()
1421 unsigned int num = READ_ONCE(f->num_members); in packet_rcv_fanout()
1422 struct net *net = read_pnet(&f->net); in packet_rcv_fanout()
1436 switch (f->type) { in packet_rcv_fanout()
1465 po = pkt_sk(f->arr[idx]); in packet_rcv_fanout()
1466 return po->prot_hook.func(skb, dev, &po->prot_hook, orig_dev); in packet_rcv_fanout()
1476 struct packet_fanout *f = po->fanout; in __fanout_link()
1478 spin_lock(&f->lock); in __fanout_link()
1479 f->arr[f->num_members] = sk; in __fanout_link()
1481 f->num_members++; in __fanout_link()
1482 if (f->num_members == 1) in __fanout_link()
1483 dev_add_pack(&f->prot_hook); in __fanout_link()
1484 spin_unlock(&f->lock); in __fanout_link()
1489 struct packet_fanout *f = po->fanout; in __fanout_unlink()
1492 spin_lock(&f->lock); in __fanout_unlink()
1493 for (i = 0; i < f->num_members; i++) { in __fanout_unlink()
1494 if (f->arr[i] == sk) in __fanout_unlink()
1497 BUG_ON(i >= f->num_members); in __fanout_unlink()
1498 f->arr[i] = f->arr[f->num_members - 1]; in __fanout_unlink()
1499 f->num_members--; in __fanout_unlink()
1500 if (f->num_members == 0) in __fanout_unlink()
1501 __dev_remove_pack(&f->prot_hook); in __fanout_unlink()
1502 spin_unlock(&f->lock); in __fanout_unlink()
1507 if (sk->sk_family != PF_PACKET) in match_fanout_group()
1510 return ptype->af_packet_priv == pkt_sk(sk)->fanout; in match_fanout_group()
1515 switch (f->type) { in fanout_init_data()
1517 atomic_set(&f->rr_cur, 0); in fanout_init_data()
1521 RCU_INIT_POINTER(f->bpf_prog, NULL); in fanout_init_data()
1530 spin_lock(&f->lock); in __fanout_set_data_bpf()
1531 old = rcu_dereference_protected(f->bpf_prog, lockdep_is_held(&f->lock)); in __fanout_set_data_bpf()
1532 rcu_assign_pointer(f->bpf_prog, new); in __fanout_set_data_bpf()
1533 spin_unlock(&f->lock); in __fanout_set_data_bpf()
1548 if (sock_flag(&po->sk, SOCK_FILTER_LOCKED)) in fanout_set_data_cbpf()
1549 return -EPERM; in fanout_set_data_cbpf()
1551 return -EINVAL; in fanout_set_data_cbpf()
1553 return -EFAULT; in fanout_set_data_cbpf()
1559 __fanout_set_data_bpf(po->fanout, new); in fanout_set_data_cbpf()
1569 if (sock_flag(&po->sk, SOCK_FILTER_LOCKED)) in fanout_set_data_ebpf()
1570 return -EPERM; in fanout_set_data_ebpf()
1572 return -EINVAL; in fanout_set_data_ebpf()
1574 return -EFAULT; in fanout_set_data_ebpf()
1580 __fanout_set_data_bpf(po->fanout, new); in fanout_set_data_ebpf()
1587 switch (po->fanout->type) { in fanout_set_data()
1593 return -EINVAL; in fanout_set_data()
1599 switch (f->type) { in fanout_release_data()
1611 if (f->id == candidate_id && in __fanout_id_is_free()
1612 read_pnet(&f->net) == sock_net(sk)) { in __fanout_id_is_free()
1638 struct packet_rollover *rollover = NULL; in fanout_add() local
1648 return -EINVAL; in fanout_add()
1658 return -EINVAL; in fanout_add()
1663 err = -EALREADY; in fanout_add()
1664 if (po->fanout) in fanout_add()
1669 err = -ENOMEM; in fanout_add()
1670 rollover = kzalloc(sizeof(*rollover), GFP_KERNEL); in fanout_add()
1671 if (!rollover) in fanout_add()
1673 atomic_long_set(&rollover->num, 0); in fanout_add()
1674 atomic_long_set(&rollover->num_huge, 0); in fanout_add()
1675 atomic_long_set(&rollover->num_failed, 0); in fanout_add()
1680 err = -EINVAL; in fanout_add()
1684 err = -ENOMEM; in fanout_add()
1693 if (f->id == id && in fanout_add()
1694 read_pnet(&f->net) == sock_net(sk)) { in fanout_add()
1699 err = -EINVAL; in fanout_add()
1700 if (match && match->flags != flags) in fanout_add()
1703 err = -ENOMEM; in fanout_add()
1707 write_pnet(&match->net, sock_net(sk)); in fanout_add()
1708 match->id = id; in fanout_add()
1709 match->type = type; in fanout_add()
1710 match->flags = flags; in fanout_add()
1711 INIT_LIST_HEAD(&match->list); in fanout_add()
1712 spin_lock_init(&match->lock); in fanout_add()
1713 refcount_set(&match->sk_ref, 0); in fanout_add()
1715 match->prot_hook.type = po->prot_hook.type; in fanout_add()
1716 match->prot_hook.dev = po->prot_hook.dev; in fanout_add()
1717 match->prot_hook.func = packet_rcv_fanout; in fanout_add()
1718 match->prot_hook.af_packet_priv = match; in fanout_add()
1719 match->prot_hook.id_match = match_fanout_group; in fanout_add()
1720 list_add(&match->list, &fanout_list); in fanout_add()
1722 err = -EINVAL; in fanout_add()
1724 spin_lock(&po->bind_lock); in fanout_add()
1725 if (po->running && in fanout_add()
1726 match->type == type && in fanout_add()
1727 match->prot_hook.type == po->prot_hook.type && in fanout_add()
1728 match->prot_hook.dev == po->prot_hook.dev) { in fanout_add()
1729 err = -ENOSPC; in fanout_add()
1730 if (refcount_read(&match->sk_ref) < PACKET_FANOUT_MAX) { in fanout_add()
1731 __dev_remove_pack(&po->prot_hook); in fanout_add()
1732 po->fanout = match; in fanout_add()
1733 po->rollover = rollover; in fanout_add()
1734 rollover = NULL; in fanout_add()
1735 refcount_set(&match->sk_ref, refcount_read(&match->sk_ref) + 1); in fanout_add()
1740 spin_unlock(&po->bind_lock); in fanout_add()
1742 if (err && !refcount_read(&match->sk_ref)) { in fanout_add()
1743 list_del(&match->list); in fanout_add()
1748 kfree(rollover); in fanout_add()
1753 /* If pkt_sk(sk)->fanout->sk_ref is zero, this function removes
1754 * pkt_sk(sk)->fanout from fanout_list and returns pkt_sk(sk)->fanout.
1764 f = po->fanout; in fanout_release()
1766 po->fanout = NULL; in fanout_release()
1768 if (refcount_dec_and_test(&f->sk_ref)) in fanout_release()
1769 list_del(&f->list); in fanout_release()
1781 /* Earlier code assumed this would be a VLAN pkt, double-check in packet_extra_vlan_len_allowed()
1785 if (unlikely(dev->type != ARPHRD_ETHER)) in packet_extra_vlan_len_allowed()
1789 return likely(eth_hdr(skb)->h_proto == htons(ETH_P_8021Q)); in packet_extra_vlan_len_allowed()
1807 sk = pt->af_packet_priv; in packet_rcv_spkt()
1816 * For outgoing ones skb->data == skb_mac_header(skb) in packet_rcv_spkt()
1820 if (skb->pkt_type == PACKET_LOOPBACK) in packet_rcv_spkt()
1836 spkt = &PACKET_SKB_CB(skb)->sa.pkt; in packet_rcv_spkt()
1838 skb_push(skb, skb->data - skb_mac_header(skb)); in packet_rcv_spkt()
1844 spkt->spkt_family = dev->type; in packet_rcv_spkt()
1845 strlcpy(spkt->spkt_device, dev->name, sizeof(spkt->spkt_device)); in packet_rcv_spkt()
1846 spkt->spkt_protocol = skb->protocol; in packet_rcv_spkt()
1871 struct sock *sk = sock->sk; in packet_sendmsg_spkt()
1872 DECLARE_SOCKADDR(struct sockaddr_pkt *, saddr, msg->msg_name); in packet_sendmsg_spkt()
1885 if (msg->msg_namelen < sizeof(struct sockaddr)) in packet_sendmsg_spkt()
1886 return -EINVAL; in packet_sendmsg_spkt()
1887 if (msg->msg_namelen == sizeof(struct sockaddr_pkt)) in packet_sendmsg_spkt()
1888 proto = saddr->spkt_protocol; in packet_sendmsg_spkt()
1890 return -ENOTCONN; /* SOCK_PACKET must be sent giving an address */ in packet_sendmsg_spkt()
1896 saddr->spkt_device[sizeof(saddr->spkt_device) - 1] = 0; in packet_sendmsg_spkt()
1899 dev = dev_get_by_name_rcu(sock_net(sk), saddr->spkt_device); in packet_sendmsg_spkt()
1900 err = -ENODEV; in packet_sendmsg_spkt()
1904 err = -ENETDOWN; in packet_sendmsg_spkt()
1905 if (!(dev->flags & IFF_UP)) in packet_sendmsg_spkt()
1915 err = -EPROTONOSUPPORT; in packet_sendmsg_spkt()
1921 err = -EMSGSIZE; in packet_sendmsg_spkt()
1922 if (len > dev->mtu + dev->hard_header_len + VLAN_HLEN + extra_len) in packet_sendmsg_spkt()
1927 int tlen = dev->needed_tailroom; in packet_sendmsg_spkt()
1928 unsigned int hhlen = dev->header_ops ? dev->hard_header_len : 0; in packet_sendmsg_spkt()
1933 return -ENOBUFS; in packet_sendmsg_spkt()
1943 skb->data -= hhlen; in packet_sendmsg_spkt()
1944 skb->tail -= hhlen; in packet_sendmsg_spkt()
1954 if (!dev_validate_header(dev, skb->data, len)) { in packet_sendmsg_spkt()
1955 err = -EINVAL; in packet_sendmsg_spkt()
1958 if (len > (dev->mtu + dev->hard_header_len + extra_len) && in packet_sendmsg_spkt()
1960 err = -EMSGSIZE; in packet_sendmsg_spkt()
1965 if (msg->msg_controllen) { in packet_sendmsg_spkt()
1971 skb->protocol = proto; in packet_sendmsg_spkt()
1972 skb->dev = dev; in packet_sendmsg_spkt()
1973 skb->priority = sk->sk_priority; in packet_sendmsg_spkt()
1974 skb->mark = sk->sk_mark; in packet_sendmsg_spkt()
1975 skb->tstamp = sockc.transmit_time; in packet_sendmsg_spkt()
1977 sock_tx_timestamp(sk, sockc.tsflags, &skb_shinfo(skb)->tx_flags); in packet_sendmsg_spkt()
1980 skb->no_fcs = 1; in packet_sendmsg_spkt()
2002 filter = rcu_dereference(sk->sk_filter); in run_filter()
2004 res = bpf_prog_run_clear_cb(filter->prog, skb); in run_filter()
2016 return -EINVAL; in packet_rcv_vnet()
2017 *len -= sizeof(vnet_hdr); in packet_rcv_vnet()
2020 return -EINVAL; in packet_rcv_vnet()
2029 * Note tricky part: we DO mangle shared skb! skb->data, skb->len
2030 * and skb->cb are mangled. It works because (and until) packets
2043 u8 *skb_head = skb->data; in packet_rcv()
2044 int skb_len = skb->len; in packet_rcv()
2048 if (skb->pkt_type == PACKET_LOOPBACK) in packet_rcv()
2051 sk = pt->af_packet_priv; in packet_rcv()
2057 skb->dev = dev; in packet_rcv()
2059 if (dev->header_ops) { in packet_rcv()
2067 if (sk->sk_type != SOCK_DGRAM) in packet_rcv()
2068 skb_push(skb, skb->data - skb_mac_header(skb)); in packet_rcv()
2069 else if (skb->pkt_type == PACKET_OUTGOING) { in packet_rcv()
2075 snaplen = skb->len; in packet_rcv()
2083 if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf) in packet_rcv()
2091 if (skb_head != skb->data) { in packet_rcv()
2092 skb->data = skb_head; in packet_rcv()
2093 skb->len = skb_len; in packet_rcv()
2099 sock_skb_cb_check_size(sizeof(*PACKET_SKB_CB(skb)) + MAX_ADDR_LEN - 8); in packet_rcv()
2101 sll = &PACKET_SKB_CB(skb)->sa.ll; in packet_rcv()
2102 sll->sll_hatype = dev->type; in packet_rcv()
2103 sll->sll_pkttype = skb->pkt_type; in packet_rcv()
2104 if (unlikely(po->origdev)) in packet_rcv()
2105 sll->sll_ifindex = orig_dev->ifindex; in packet_rcv()
2107 sll->sll_ifindex = dev->ifindex; in packet_rcv()
2109 sll->sll_halen = dev_parse_header(skb, sll->sll_addr); in packet_rcv()
2111 /* sll->sll_family and sll->sll_protocol are set in packet_recvmsg(). in packet_rcv()
2114 PACKET_SKB_CB(skb)->sa.origlen = skb->len; in packet_rcv()
2120 skb->dev = NULL; in packet_rcv()
2126 spin_lock(&sk->sk_receive_queue.lock); in packet_rcv()
2127 po->stats.stats1.tp_packets++; in packet_rcv()
2129 __skb_queue_tail(&sk->sk_receive_queue, skb); in packet_rcv()
2130 spin_unlock(&sk->sk_receive_queue.lock); in packet_rcv()
2131 sk->sk_data_ready(sk); in packet_rcv()
2136 atomic_inc(&po->tp_drops); in packet_rcv()
2137 atomic_inc(&sk->sk_drops); in packet_rcv()
2140 if (skb_head != skb->data && skb_shared(skb)) { in packet_rcv()
2141 skb->data = skb_head; in packet_rcv()
2142 skb->len = skb_len; in packet_rcv()
2159 u8 *skb_head = skb->data; in tpacket_rcv()
2160 int skb_len = skb->len; in tpacket_rcv()
2179 if (skb->pkt_type == PACKET_LOOPBACK) in tpacket_rcv()
2182 sk = pt->af_packet_priv; in tpacket_rcv()
2188 if (dev->header_ops) { in tpacket_rcv()
2189 if (sk->sk_type != SOCK_DGRAM) in tpacket_rcv()
2190 skb_push(skb, skb->data - skb_mac_header(skb)); in tpacket_rcv()
2191 else if (skb->pkt_type == PACKET_OUTGOING) { in tpacket_rcv()
2197 snaplen = skb->len; in tpacket_rcv()
2203 if (skb->ip_summed == CHECKSUM_PARTIAL) in tpacket_rcv()
2205 else if (skb->pkt_type != PACKET_OUTGOING && in tpacket_rcv()
2206 (skb->ip_summed == CHECKSUM_COMPLETE || in tpacket_rcv()
2213 if (sk->sk_type == SOCK_DGRAM) { in tpacket_rcv()
2214 macoff = netoff = TPACKET_ALIGN(po->tp_hdrlen) + 16 + in tpacket_rcv()
2215 po->tp_reserve; in tpacket_rcv()
2218 netoff = TPACKET_ALIGN(po->tp_hdrlen + in tpacket_rcv()
2220 po->tp_reserve; in tpacket_rcv()
2221 if (po->has_vnet_hdr) { in tpacket_rcv()
2225 macoff = netoff - maclen; in tpacket_rcv()
2228 spin_lock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2229 po->stats.stats1.tp_drops++; in tpacket_rcv()
2230 spin_unlock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2233 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2234 if (macoff + snaplen > po->rx_ring.frame_size) { in tpacket_rcv()
2235 if (po->copy_thresh && in tpacket_rcv()
2236 atomic_read(&sk->sk_rmem_alloc) < sk->sk_rcvbuf) { in tpacket_rcv()
2241 skb_head = skb->data; in tpacket_rcv()
2246 snaplen = po->rx_ring.frame_size - macoff; in tpacket_rcv()
2253 GET_PBDQC_FROM_RB(&po->rx_ring)->max_frame_len)) { in tpacket_rcv()
2256 nval = GET_PBDQC_FROM_RB(&po->rx_ring)->max_frame_len - macoff; in tpacket_rcv()
2262 macoff = GET_PBDQC_FROM_RB(&po->rx_ring)->max_frame_len; in tpacket_rcv()
2266 spin_lock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2272 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2273 slot_id = po->rx_ring.head; in tpacket_rcv()
2274 if (test_bit(slot_id, po->rx_ring.rx_owner_map)) in tpacket_rcv()
2276 __set_bit(slot_id, po->rx_ring.rx_owner_map); in tpacket_rcv()
2280 virtio_net_hdr_from_skb(skb, h.raw + macoff - in tpacket_rcv()
2283 if (po->tp_version == TPACKET_V3) in tpacket_rcv()
2284 prb_clear_blk_fill_status(&po->rx_ring); in tpacket_rcv()
2288 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2289 packet_increment_rx_head(po, &po->rx_ring); in tpacket_rcv()
2291 * LOSING will be reported till you read the stats, in tpacket_rcv()
2292 * because it's COR - Clear On Read. in tpacket_rcv()
2296 if (atomic_read(&po->tp_drops)) in tpacket_rcv()
2300 po->stats.stats1.tp_packets++; in tpacket_rcv()
2303 __skb_queue_tail(&sk->sk_receive_queue, copy_skb); in tpacket_rcv()
2305 spin_unlock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2309 if (!(ts_status = tpacket_get_timestamp(skb, &ts, po->tp_tstamp))) in tpacket_rcv()
2314 switch (po->tp_version) { in tpacket_rcv()
2316 h.h1->tp_len = skb->len; in tpacket_rcv()
2317 h.h1->tp_snaplen = snaplen; in tpacket_rcv()
2318 h.h1->tp_mac = macoff; in tpacket_rcv()
2319 h.h1->tp_net = netoff; in tpacket_rcv()
2320 h.h1->tp_sec = ts.tv_sec; in tpacket_rcv()
2321 h.h1->tp_usec = ts.tv_nsec / NSEC_PER_USEC; in tpacket_rcv()
2325 h.h2->tp_len = skb->len; in tpacket_rcv()
2326 h.h2->tp_snaplen = snaplen; in tpacket_rcv()
2327 h.h2->tp_mac = macoff; in tpacket_rcv()
2328 h.h2->tp_net = netoff; in tpacket_rcv()
2329 h.h2->tp_sec = ts.tv_sec; in tpacket_rcv()
2330 h.h2->tp_nsec = ts.tv_nsec; in tpacket_rcv()
2332 h.h2->tp_vlan_tci = skb_vlan_tag_get(skb); in tpacket_rcv()
2333 h.h2->tp_vlan_tpid = ntohs(skb->vlan_proto); in tpacket_rcv()
2336 h.h2->tp_vlan_tci = 0; in tpacket_rcv()
2337 h.h2->tp_vlan_tpid = 0; in tpacket_rcv()
2339 memset(h.h2->tp_padding, 0, sizeof(h.h2->tp_padding)); in tpacket_rcv()
2346 h.h3->tp_status |= status; in tpacket_rcv()
2347 h.h3->tp_len = skb->len; in tpacket_rcv()
2348 h.h3->tp_snaplen = snaplen; in tpacket_rcv()
2349 h.h3->tp_mac = macoff; in tpacket_rcv()
2350 h.h3->tp_net = netoff; in tpacket_rcv()
2351 h.h3->tp_sec = ts.tv_sec; in tpacket_rcv()
2352 h.h3->tp_nsec = ts.tv_nsec; in tpacket_rcv()
2353 memset(h.h3->tp_padding, 0, sizeof(h.h3->tp_padding)); in tpacket_rcv()
2361 sll->sll_halen = dev_parse_header(skb, sll->sll_addr); in tpacket_rcv()
2362 sll->sll_family = AF_PACKET; in tpacket_rcv()
2363 sll->sll_hatype = dev->type; in tpacket_rcv()
2364 sll->sll_protocol = skb->protocol; in tpacket_rcv()
2365 sll->sll_pkttype = skb->pkt_type; in tpacket_rcv()
2366 if (unlikely(po->origdev)) in tpacket_rcv()
2367 sll->sll_ifindex = orig_dev->ifindex; in tpacket_rcv()
2369 sll->sll_ifindex = dev->ifindex; in tpacket_rcv()
2374 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2386 if (po->tp_version <= TPACKET_V2) { in tpacket_rcv()
2387 spin_lock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2389 __clear_bit(slot_id, po->rx_ring.rx_owner_map); in tpacket_rcv()
2390 spin_unlock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2391 sk->sk_data_ready(sk); in tpacket_rcv()
2392 } else if (po->tp_version == TPACKET_V3) { in tpacket_rcv()
2393 prb_clear_blk_fill_status(&po->rx_ring); in tpacket_rcv()
2397 if (skb_head != skb->data && skb_shared(skb)) { in tpacket_rcv()
2398 skb->data = skb_head; in tpacket_rcv()
2399 skb->len = skb_len; in tpacket_rcv()
2409 spin_unlock(&sk->sk_receive_queue.lock); in tpacket_rcv()
2410 atomic_inc(&po->tp_drops); in tpacket_rcv()
2413 sk->sk_data_ready(sk); in tpacket_rcv()
2420 struct packet_sock *po = pkt_sk(skb->sk); in tpacket_destruct_skb()
2422 if (likely(po->tx_ring.pg_vec)) { in tpacket_destruct_skb()
2427 packet_dec_pending(&po->tx_ring); in tpacket_destruct_skb()
2432 if (!packet_read_pending(&po->tx_ring)) in tpacket_destruct_skb()
2433 complete(&po->skb_completion); in tpacket_destruct_skb()
2442 if (dev->type == ARPHRD_ETHER) { in tpacket_set_protocol()
2444 skb->protocol = eth_hdr(skb)->h_proto; in tpacket_set_protocol()
2450 if ((vnet_hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) && in __packet_snd_vnet_parse()
2451 (__virtio16_to_cpu(vio_le(), vnet_hdr->csum_start) + in __packet_snd_vnet_parse()
2452 __virtio16_to_cpu(vio_le(), vnet_hdr->csum_offset) + 2 > in __packet_snd_vnet_parse()
2453 __virtio16_to_cpu(vio_le(), vnet_hdr->hdr_len))) in __packet_snd_vnet_parse()
2454 vnet_hdr->hdr_len = __cpu_to_virtio16(vio_le(), in __packet_snd_vnet_parse()
2455 __virtio16_to_cpu(vio_le(), vnet_hdr->csum_start) + in __packet_snd_vnet_parse()
2456 __virtio16_to_cpu(vio_le(), vnet_hdr->csum_offset) + 2); in __packet_snd_vnet_parse()
2458 if (__virtio16_to_cpu(vio_le(), vnet_hdr->hdr_len) > len) in __packet_snd_vnet_parse()
2459 return -EINVAL; in __packet_snd_vnet_parse()
2468 return -EINVAL; in packet_snd_vnet_parse()
2469 *len -= sizeof(*vnet_hdr); in packet_snd_vnet_parse()
2471 if (!copy_from_iter_full(vnet_hdr, sizeof(*vnet_hdr), &msg->msg_iter)) in packet_snd_vnet_parse()
2472 return -EFAULT; in packet_snd_vnet_parse()
2484 struct socket *sock = po->sk.sk_socket; in tpacket_fill_skb()
2490 skb->protocol = proto; in tpacket_fill_skb()
2491 skb->dev = dev; in tpacket_fill_skb()
2492 skb->priority = po->sk.sk_priority; in tpacket_fill_skb()
2493 skb->mark = po->sk.sk_mark; in tpacket_fill_skb()
2494 skb->tstamp = sockc->transmit_time; in tpacket_fill_skb()
2495 sock_tx_timestamp(&po->sk, sockc->tsflags, &skb_shinfo(skb)->tx_flags); in tpacket_fill_skb()
2503 if (sock->type == SOCK_DGRAM) { in tpacket_fill_skb()
2507 return -EINVAL; in tpacket_fill_skb()
2511 skb_push(skb, dev->hard_header_len); in tpacket_fill_skb()
2512 skb_put(skb, copylen - dev->hard_header_len); in tpacket_fill_skb()
2516 if (!dev_validate_header(dev, skb->data, hdrlen)) in tpacket_fill_skb()
2517 return -EINVAL; in tpacket_fill_skb()
2518 if (!skb->protocol) in tpacket_fill_skb()
2522 to_write -= hdrlen; in tpacket_fill_skb()
2526 len_max = PAGE_SIZE - offset; in tpacket_fill_skb()
2529 skb->data_len = to_write; in tpacket_fill_skb()
2530 skb->len += to_write; in tpacket_fill_skb()
2531 skb->truesize += to_write; in tpacket_fill_skb()
2532 refcount_add(to_write, &po->sk.sk_wmem_alloc); in tpacket_fill_skb()
2535 nr_frags = skb_shinfo(skb)->nr_frags; in tpacket_fill_skb()
2540 return -EFAULT; in tpacket_fill_skb()
2548 to_write -= len; in tpacket_fill_skb()
2567 switch (po->tp_version) { in tpacket_parse_header()
2569 if (ph.h3->tp_next_offset != 0) { in tpacket_parse_header()
2571 return -EINVAL; in tpacket_parse_header()
2573 tp_len = ph.h3->tp_len; in tpacket_parse_header()
2576 tp_len = ph.h2->tp_len; in tpacket_parse_header()
2579 tp_len = ph.h1->tp_len; in tpacket_parse_header()
2584 return -EMSGSIZE; in tpacket_parse_header()
2587 if (unlikely(po->tp_tx_has_off)) { in tpacket_parse_header()
2590 off_min = po->tp_hdrlen - sizeof(struct sockaddr_ll); in tpacket_parse_header()
2591 off_max = po->tx_ring.frame_size - tp_len; in tpacket_parse_header()
2592 if (po->sk.sk_type == SOCK_DGRAM) { in tpacket_parse_header()
2593 switch (po->tp_version) { in tpacket_parse_header()
2595 off = ph.h3->tp_net; in tpacket_parse_header()
2598 off = ph.h2->tp_net; in tpacket_parse_header()
2601 off = ph.h1->tp_net; in tpacket_parse_header()
2605 switch (po->tp_version) { in tpacket_parse_header()
2607 off = ph.h3->tp_mac; in tpacket_parse_header()
2610 off = ph.h2->tp_mac; in tpacket_parse_header()
2613 off = ph.h1->tp_mac; in tpacket_parse_header()
2618 return -EINVAL; in tpacket_parse_header()
2620 off = po->tp_hdrlen - sizeof(struct sockaddr_ll); in tpacket_parse_header()
2636 DECLARE_SOCKADDR(struct sockaddr_ll *, saddr, msg->msg_name); in tpacket_snd()
2637 bool need_wait = !(msg->msg_flags & MSG_DONTWAIT); in tpacket_snd()
2646 mutex_lock(&po->pg_vec_lock); in tpacket_snd()
2651 if (unlikely(!po->tx_ring.pg_vec)) { in tpacket_snd()
2652 err = -EBUSY; in tpacket_snd()
2657 proto = po->num; in tpacket_snd()
2659 err = -EINVAL; in tpacket_snd()
2660 if (msg->msg_namelen < sizeof(struct sockaddr_ll)) in tpacket_snd()
2662 if (msg->msg_namelen < (saddr->sll_halen in tpacket_snd()
2666 proto = saddr->sll_protocol; in tpacket_snd()
2667 dev = dev_get_by_index(sock_net(&po->sk), saddr->sll_ifindex); in tpacket_snd()
2668 if (po->sk.sk_socket->type == SOCK_DGRAM) { in tpacket_snd()
2669 if (dev && msg->msg_namelen < dev->addr_len + in tpacket_snd()
2672 addr = saddr->sll_addr; in tpacket_snd()
2676 err = -ENXIO; in tpacket_snd()
2679 err = -ENETDOWN; in tpacket_snd()
2680 if (unlikely(!(dev->flags & IFF_UP))) in tpacket_snd()
2683 sockcm_init(&sockc, &po->sk); in tpacket_snd()
2684 if (msg->msg_controllen) { in tpacket_snd()
2685 err = sock_cmsg_send(&po->sk, msg, &sockc); in tpacket_snd()
2690 if (po->sk.sk_socket->type == SOCK_RAW) in tpacket_snd()
2691 reserve = dev->hard_header_len; in tpacket_snd()
2692 size_max = po->tx_ring.frame_size in tpacket_snd()
2693 - (po->tp_hdrlen - sizeof(struct sockaddr_ll)); in tpacket_snd()
2695 if ((size_max > dev->mtu + reserve + VLAN_HLEN) && !po->has_vnet_hdr) in tpacket_snd()
2696 size_max = dev->mtu + reserve + VLAN_HLEN; in tpacket_snd()
2698 reinit_completion(&po->skb_completion); in tpacket_snd()
2701 ph = packet_current_frame(po, &po->tx_ring, in tpacket_snd()
2705 timeo = sock_sndtimeo(&po->sk, msg->msg_flags & MSG_DONTWAIT); in tpacket_snd()
2706 timeo = wait_for_completion_interruptible_timeout(&po->skb_completion, timeo); in tpacket_snd()
2708 err = !timeo ? -ETIMEDOUT : -ERESTARTSYS; in tpacket_snd()
2723 tlen = dev->needed_tailroom; in tpacket_snd()
2724 if (po->has_vnet_hdr) { in tpacket_snd()
2727 tp_len -= sizeof(*vnet_hdr); in tpacket_snd()
2730 tp_len = -EINVAL; in tpacket_snd()
2734 vnet_hdr->hdr_len); in tpacket_snd()
2736 copylen = max_t(int, copylen, dev->hard_header_len); in tpacket_snd()
2737 skb = sock_alloc_send_skb(&po->sk, in tpacket_snd()
2739 (copylen - dev->hard_header_len), in tpacket_snd()
2751 tp_len > dev->mtu + reserve && in tpacket_snd()
2752 !po->has_vnet_hdr && in tpacket_snd()
2754 tp_len = -EMSGSIZE; in tpacket_snd()
2758 if (po->tp_loss) { in tpacket_snd()
2761 packet_increment_head(&po->tx_ring); in tpacket_snd()
2771 if (po->has_vnet_hdr) { in tpacket_snd()
2773 tp_len = -EINVAL; in tpacket_snd()
2779 skb->destructor = tpacket_destruct_skb; in tpacket_snd()
2781 packet_inc_pending(&po->tx_ring); in tpacket_snd()
2784 err = po->xmit(skb); in tpacket_snd()
2799 packet_increment_head(&po->tx_ring); in tpacket_snd()
2803 * to call it as it's per_cpu variable, but in fast-path in tpacket_snd()
2804 * we already short-circuit the loop with the first in tpacket_snd()
2808 (need_wait && packet_read_pending(&po->tx_ring)))); in tpacket_snd()
2819 mutex_unlock(&po->pg_vec_lock); in tpacket_snd()
2834 skb = sock_alloc_send_pskb(sk, prepad + linear, len - linear, noblock, in packet_alloc_skb()
2841 skb->data_len = len - linear; in packet_alloc_skb()
2842 skb->len += len - linear; in packet_alloc_skb()
2849 struct sock *sk = sock->sk; in packet_snd()
2850 DECLARE_SOCKADDR(struct sockaddr_ll *, saddr, msg->msg_name); in packet_snd()
2870 proto = po->num; in packet_snd()
2872 err = -EINVAL; in packet_snd()
2873 if (msg->msg_namelen < sizeof(struct sockaddr_ll)) in packet_snd()
2875 if (msg->msg_namelen < (saddr->sll_halen + offsetof(struct sockaddr_ll, sll_addr))) in packet_snd()
2877 proto = saddr->sll_protocol; in packet_snd()
2878 dev = dev_get_by_index(sock_net(sk), saddr->sll_ifindex); in packet_snd()
2879 if (sock->type == SOCK_DGRAM) { in packet_snd()
2880 if (dev && msg->msg_namelen < dev->addr_len + in packet_snd()
2883 addr = saddr->sll_addr; in packet_snd()
2887 err = -ENXIO; in packet_snd()
2890 err = -ENETDOWN; in packet_snd()
2891 if (unlikely(!(dev->flags & IFF_UP))) in packet_snd()
2895 sockc.mark = sk->sk_mark; in packet_snd()
2896 if (msg->msg_controllen) { in packet_snd()
2902 if (sock->type == SOCK_RAW) in packet_snd()
2903 reserve = dev->hard_header_len; in packet_snd()
2904 if (po->has_vnet_hdr) { in packet_snd()
2913 err = -EPROTONOSUPPORT; in packet_snd()
2919 err = -EMSGSIZE; in packet_snd()
2921 (len > dev->mtu + reserve + VLAN_HLEN + extra_len)) in packet_snd()
2924 err = -ENOBUFS; in packet_snd()
2926 tlen = dev->needed_tailroom; in packet_snd()
2928 linear = max(linear, min_t(int, len, dev->hard_header_len)); in packet_snd()
2930 msg->msg_flags & MSG_DONTWAIT, &err); in packet_snd()
2936 err = -EINVAL; in packet_snd()
2937 if (sock->type == SOCK_DGRAM) { in packet_snd()
2942 skb_reserve(skb, -reserve); in packet_snd()
2944 dev->min_header_len != dev->hard_header_len) in packet_snd()
2948 /* Returns -EFAULT on error */ in packet_snd()
2949 err = skb_copy_datagram_from_iter(skb, offset, &msg->msg_iter, len); in packet_snd()
2953 if (sock->type == SOCK_RAW && in packet_snd()
2954 !dev_validate_header(dev, skb->data, len)) { in packet_snd()
2955 err = -EINVAL; in packet_snd()
2959 sock_tx_timestamp(sk, sockc.tsflags, &skb_shinfo(skb)->tx_flags); in packet_snd()
2961 if (!vnet_hdr.gso_type && (len > dev->mtu + reserve + extra_len) && in packet_snd()
2963 err = -EMSGSIZE; in packet_snd()
2967 skb->protocol = proto; in packet_snd()
2968 skb->dev = dev; in packet_snd()
2969 skb->priority = sk->sk_priority; in packet_snd()
2970 skb->mark = sockc.mark; in packet_snd()
2971 skb->tstamp = sockc.transmit_time; in packet_snd()
2984 skb->no_fcs = 1; in packet_snd()
2986 err = po->xmit(skb); in packet_snd()
3005 struct sock *sk = sock->sk; in packet_sendmsg()
3008 if (po->tx_ring.pg_vec) in packet_sendmsg()
3021 struct sock *sk = sock->sk; in packet_release()
3033 mutex_lock(&net->packet.sklist_lock); in packet_release()
3035 mutex_unlock(&net->packet.sklist_lock); in packet_release()
3038 sock_prot_inuse_add(net, sk->sk_prot, -1); in packet_release()
3041 spin_lock(&po->bind_lock); in packet_release()
3045 if (po->prot_hook.dev) { in packet_release()
3046 dev_put(po->prot_hook.dev); in packet_release()
3047 po->prot_hook.dev = NULL; in packet_release()
3049 spin_unlock(&po->bind_lock); in packet_release()
3054 if (po->rx_ring.pg_vec) { in packet_release()
3059 if (po->tx_ring.pg_vec) { in packet_release()
3069 kfree(po->rollover); in packet_release()
3075 * Now the socket is dead. No more input will appear. in packet_release()
3078 sock->sk = NULL; in packet_release()
3082 skb_queue_purge(&sk->sk_receive_queue); in packet_release()
3106 spin_lock(&po->bind_lock); in packet_do_bind()
3109 if (po->fanout) { in packet_do_bind()
3110 ret = -EINVAL; in packet_do_bind()
3117 ret = -ENODEV; in packet_do_bind()
3123 ret = -ENODEV; in packet_do_bind()
3131 proto_curr = po->prot_hook.type; in packet_do_bind()
3132 dev_curr = po->prot_hook.dev; in packet_do_bind()
3137 if (po->running) { in packet_do_bind()
3142 po->num = 0; in packet_do_bind()
3145 dev_curr = po->prot_hook.dev; in packet_do_bind()
3148 dev->ifindex); in packet_do_bind()
3151 BUG_ON(po->running); in packet_do_bind()
3152 po->num = proto; in packet_do_bind()
3153 po->prot_hook.type = proto; in packet_do_bind()
3157 po->prot_hook.dev = NULL; in packet_do_bind()
3158 po->ifindex = -1; in packet_do_bind()
3161 po->prot_hook.dev = dev; in packet_do_bind()
3162 po->ifindex = dev ? dev->ifindex : 0; in packet_do_bind()
3172 if (!unlisted && (!dev || (dev->flags & IFF_UP))) { in packet_do_bind()
3175 sk->sk_err = ENETDOWN; in packet_do_bind()
3177 sk->sk_error_report(sk); in packet_do_bind()
3182 spin_unlock(&po->bind_lock); in packet_do_bind()
3194 struct sock *sk = sock->sk; in packet_bind_spkt()
3195 char name[sizeof(uaddr->sa_data) + 1]; in packet_bind_spkt()
3202 return -EINVAL; in packet_bind_spkt()
3203 /* uaddr->sa_data comes from the userspace, it's not guaranteed to be in packet_bind_spkt()
3204 * zero-terminated. in packet_bind_spkt()
3206 memcpy(name, uaddr->sa_data, sizeof(uaddr->sa_data)); in packet_bind_spkt()
3207 name[sizeof(uaddr->sa_data)] = 0; in packet_bind_spkt()
3209 return packet_do_bind(sk, name, 0, pkt_sk(sk)->num); in packet_bind_spkt()
3215 struct sock *sk = sock->sk; in packet_bind()
3222 return -EINVAL; in packet_bind()
3223 if (sll->sll_family != AF_PACKET) in packet_bind()
3224 return -EINVAL; in packet_bind()
3226 return packet_do_bind(sk, NULL, sll->sll_ifindex, in packet_bind()
3227 sll->sll_protocol ? : pkt_sk(sk)->num); in packet_bind()
3248 if (!ns_capable(net->user_ns, CAP_NET_RAW)) in packet_create()
3249 return -EPERM; in packet_create()
3250 if (sock->type != SOCK_DGRAM && sock->type != SOCK_RAW && in packet_create()
3251 sock->type != SOCK_PACKET) in packet_create()
3252 return -ESOCKTNOSUPPORT; in packet_create()
3254 sock->state = SS_UNCONNECTED; in packet_create()
3256 err = -ENOBUFS; in packet_create()
3261 sock->ops = &packet_ops; in packet_create()
3262 if (sock->type == SOCK_PACKET) in packet_create()
3263 sock->ops = &packet_ops_spkt; in packet_create()
3268 init_completion(&po->skb_completion); in packet_create()
3269 sk->sk_family = PF_PACKET; in packet_create()
3270 po->num = proto; in packet_create()
3271 po->xmit = dev_queue_xmit; in packet_create()
3279 sk->sk_destruct = packet_sock_destruct; in packet_create()
3286 spin_lock_init(&po->bind_lock); in packet_create()
3287 mutex_init(&po->pg_vec_lock); in packet_create()
3288 po->rollover = NULL; in packet_create()
3289 po->prot_hook.func = packet_rcv; in packet_create()
3291 if (sock->type == SOCK_PACKET) in packet_create()
3292 po->prot_hook.func = packet_rcv_spkt; in packet_create()
3294 po->prot_hook.af_packet_priv = sk; in packet_create()
3297 po->prot_hook.type = proto; in packet_create()
3301 mutex_lock(&net->packet.sklist_lock); in packet_create()
3302 sk_add_node_tail_rcu(sk, &net->packet.sklist); in packet_create()
3303 mutex_unlock(&net->packet.sklist_lock); in packet_create()
3324 struct sock *sk = sock->sk; in packet_recvmsg()
3330 err = -EINVAL; in packet_recvmsg()
3336 if (pkt_sk(sk)->ifindex < 0) in packet_recvmsg()
3337 return -ENODEV; in packet_recvmsg()
3348 * of horrible races and re-entrancy so we can forget about it in packet_recvmsg()
3366 if (pkt_sk(sk)->pressure) in packet_recvmsg()
3369 if (pkt_sk(sk)->has_vnet_hdr) { in packet_recvmsg()
3380 copied = skb->len; in packet_recvmsg()
3383 msg->msg_flags |= MSG_TRUNC; in packet_recvmsg()
3390 if (sock->type != SOCK_PACKET) { in packet_recvmsg()
3391 struct sockaddr_ll *sll = &PACKET_SKB_CB(skb)->sa.ll; in packet_recvmsg()
3394 origlen = PACKET_SKB_CB(skb)->sa.origlen; in packet_recvmsg()
3395 sll->sll_family = AF_PACKET; in packet_recvmsg()
3396 sll->sll_protocol = skb->protocol; in packet_recvmsg()
3401 if (msg->msg_name) { in packet_recvmsg()
3407 if (sock->type == SOCK_PACKET) { in packet_recvmsg()
3409 msg->msg_namelen = sizeof(struct sockaddr_pkt); in packet_recvmsg()
3410 copy_len = msg->msg_namelen; in packet_recvmsg()
3412 struct sockaddr_ll *sll = &PACKET_SKB_CB(skb)->sa.ll; in packet_recvmsg()
3414 msg->msg_namelen = sll->sll_halen + in packet_recvmsg()
3416 copy_len = msg->msg_namelen; in packet_recvmsg()
3417 if (msg->msg_namelen < sizeof(struct sockaddr_ll)) { in packet_recvmsg()
3418 memset(msg->msg_name + in packet_recvmsg()
3420 0, sizeof(sll->sll_addr)); in packet_recvmsg()
3421 msg->msg_namelen = sizeof(struct sockaddr_ll); in packet_recvmsg()
3424 memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa, copy_len); in packet_recvmsg()
3427 if (pkt_sk(sk)->auxdata) { in packet_recvmsg()
3431 if (skb->ip_summed == CHECKSUM_PARTIAL) in packet_recvmsg()
3433 else if (skb->pkt_type != PACKET_OUTGOING && in packet_recvmsg()
3434 (skb->ip_summed == CHECKSUM_COMPLETE || in packet_recvmsg()
3439 aux.tp_snaplen = skb->len; in packet_recvmsg()
3444 aux.tp_vlan_tpid = ntohs(skb->vlan_proto); in packet_recvmsg()
3455 * hides all the races and re-entrancy issues from us. in packet_recvmsg()
3457 err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied); in packet_recvmsg()
3469 struct sock *sk = sock->sk; in packet_getname_spkt()
3472 return -EOPNOTSUPP; in packet_getname_spkt()
3474 uaddr->sa_family = AF_PACKET; in packet_getname_spkt()
3475 memset(uaddr->sa_data, 0, sizeof(uaddr->sa_data)); in packet_getname_spkt()
3477 dev = dev_get_by_index_rcu(sock_net(sk), pkt_sk(sk)->ifindex); in packet_getname_spkt()
3479 strlcpy(uaddr->sa_data, dev->name, sizeof(uaddr->sa_data)); in packet_getname_spkt()
3489 struct sock *sk = sock->sk; in packet_getname()
3494 return -EOPNOTSUPP; in packet_getname()
3496 sll->sll_family = AF_PACKET; in packet_getname()
3497 sll->sll_ifindex = po->ifindex; in packet_getname()
3498 sll->sll_protocol = po->num; in packet_getname()
3499 sll->sll_pkttype = 0; in packet_getname()
3501 dev = dev_get_by_index_rcu(sock_net(sk), po->ifindex); in packet_getname()
3503 sll->sll_hatype = dev->type; in packet_getname()
3504 sll->sll_halen = dev->addr_len; in packet_getname()
3505 memcpy(sll->sll_addr, dev->dev_addr, dev->addr_len); in packet_getname()
3507 sll->sll_hatype = 0; /* Bad: we have no ARPHRD_UNSPEC */ in packet_getname()
3508 sll->sll_halen = 0; in packet_getname()
3512 return offsetof(struct sockaddr_ll, sll_addr) + sll->sll_halen; in packet_getname()
3518 switch (i->type) { in packet_dev_mc()
3520 if (i->alen != dev->addr_len) in packet_dev_mc()
3521 return -EINVAL; in packet_dev_mc()
3523 return dev_mc_add(dev, i->addr); in packet_dev_mc()
3525 return dev_mc_del(dev, i->addr); in packet_dev_mc()
3532 if (i->alen != dev->addr_len) in packet_dev_mc()
3533 return -EINVAL; in packet_dev_mc()
3535 return dev_uc_add(dev, i->addr); in packet_dev_mc()
3537 return dev_uc_del(dev, i->addr); in packet_dev_mc()
3551 if (ml->ifindex == dev->ifindex) { in packet_dev_mclist_delete()
3552 packet_dev_mc(dev, ml, -1); in packet_dev_mclist_delete()
3553 *mlp = ml->next; in packet_dev_mclist_delete()
3556 mlp = &ml->next; in packet_dev_mclist_delete()
3569 err = -ENODEV; in packet_mc_add()
3570 dev = __dev_get_by_index(sock_net(sk), mreq->mr_ifindex); in packet_mc_add()
3574 err = -EINVAL; in packet_mc_add()
3575 if (mreq->mr_alen > dev->addr_len) in packet_mc_add()
3578 err = -ENOBUFS; in packet_mc_add()
3584 for (ml = po->mclist; ml; ml = ml->next) { in packet_mc_add()
3585 if (ml->ifindex == mreq->mr_ifindex && in packet_mc_add()
3586 ml->type == mreq->mr_type && in packet_mc_add()
3587 ml->alen == mreq->mr_alen && in packet_mc_add()
3588 memcmp(ml->addr, mreq->mr_address, ml->alen) == 0) { in packet_mc_add()
3589 ml->count++; in packet_mc_add()
3596 i->type = mreq->mr_type; in packet_mc_add()
3597 i->ifindex = mreq->mr_ifindex; in packet_mc_add()
3598 i->alen = mreq->mr_alen; in packet_mc_add()
3599 memcpy(i->addr, mreq->mr_address, i->alen); in packet_mc_add()
3600 memset(i->addr + i->alen, 0, sizeof(i->addr) - i->alen); in packet_mc_add()
3601 i->count = 1; in packet_mc_add()
3602 i->next = po->mclist; in packet_mc_add()
3603 po->mclist = i; in packet_mc_add()
3606 po->mclist = i->next; in packet_mc_add()
3621 for (mlp = &pkt_sk(sk)->mclist; (ml = *mlp) != NULL; mlp = &ml->next) { in packet_mc_drop()
3622 if (ml->ifindex == mreq->mr_ifindex && in packet_mc_drop()
3623 ml->type == mreq->mr_type && in packet_mc_drop()
3624 ml->alen == mreq->mr_alen && in packet_mc_drop()
3625 memcmp(ml->addr, mreq->mr_address, ml->alen) == 0) { in packet_mc_drop()
3626 if (--ml->count == 0) { in packet_mc_drop()
3628 *mlp = ml->next; in packet_mc_drop()
3629 dev = __dev_get_by_index(sock_net(sk), ml->ifindex); in packet_mc_drop()
3631 packet_dev_mc(dev, ml, -1); in packet_mc_drop()
3646 if (!po->mclist) in packet_flush_mclist()
3650 while ((ml = po->mclist) != NULL) { in packet_flush_mclist()
3653 po->mclist = ml->next; in packet_flush_mclist()
3654 dev = __dev_get_by_index(sock_net(sk), ml->ifindex); in packet_flush_mclist()
3656 packet_dev_mc(dev, ml, -1); in packet_flush_mclist()
3665 struct sock *sk = sock->sk; in packet_setsockopt()
3670 return -ENOPROTOOPT; in packet_setsockopt()
3680 return -EINVAL; in packet_setsockopt()
3684 return -EFAULT; in packet_setsockopt()
3686 return -EINVAL; in packet_setsockopt()
3701 switch (po->tp_version) { in packet_setsockopt()
3712 ret = -EINVAL; in packet_setsockopt()
3715 ret = -EFAULT; in packet_setsockopt()
3728 return -EINVAL; in packet_setsockopt()
3730 return -EFAULT; in packet_setsockopt()
3732 pkt_sk(sk)->copy_thresh = val; in packet_setsockopt()
3740 return -EINVAL; in packet_setsockopt()
3742 return -EFAULT; in packet_setsockopt()
3749 return -EINVAL; in packet_setsockopt()
3752 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3753 ret = -EBUSY; in packet_setsockopt()
3755 po->tp_version = val; in packet_setsockopt()
3766 return -EINVAL; in packet_setsockopt()
3768 return -EFAULT; in packet_setsockopt()
3770 return -EINVAL; in packet_setsockopt()
3772 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3773 ret = -EBUSY; in packet_setsockopt()
3775 po->tp_reserve = val; in packet_setsockopt()
3786 return -EINVAL; in packet_setsockopt()
3788 return -EFAULT; in packet_setsockopt()
3791 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3792 ret = -EBUSY; in packet_setsockopt()
3794 po->tp_loss = !!val; in packet_setsockopt()
3805 return -EINVAL; in packet_setsockopt()
3807 return -EFAULT; in packet_setsockopt()
3810 po->auxdata = !!val; in packet_setsockopt()
3819 return -EINVAL; in packet_setsockopt()
3821 return -EFAULT; in packet_setsockopt()
3824 po->origdev = !!val; in packet_setsockopt()
3832 if (sock->type != SOCK_RAW) in packet_setsockopt()
3833 return -EINVAL; in packet_setsockopt()
3835 return -EINVAL; in packet_setsockopt()
3837 return -EFAULT; in packet_setsockopt()
3840 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3841 ret = -EBUSY; in packet_setsockopt()
3843 po->has_vnet_hdr = !!val; in packet_setsockopt()
3854 return -EINVAL; in packet_setsockopt()
3856 return -EFAULT; in packet_setsockopt()
3858 po->tp_tstamp = val; in packet_setsockopt()
3866 return -EINVAL; in packet_setsockopt()
3868 return -EFAULT; in packet_setsockopt()
3874 if (!po->fanout) in packet_setsockopt()
3875 return -EINVAL; in packet_setsockopt()
3884 return -EINVAL; in packet_setsockopt()
3886 return -EFAULT; in packet_setsockopt()
3889 if (po->rx_ring.pg_vec || po->tx_ring.pg_vec) { in packet_setsockopt()
3890 ret = -EBUSY; in packet_setsockopt()
3892 po->tp_tx_has_off = !!val; in packet_setsockopt()
3903 return -EINVAL; in packet_setsockopt()
3905 return -EFAULT; in packet_setsockopt()
3907 po->xmit = val ? packet_direct_xmit : dev_queue_xmit; in packet_setsockopt()
3911 return -ENOPROTOOPT; in packet_setsockopt()
3920 struct sock *sk = sock->sk; in packet_getsockopt()
3928 return -ENOPROTOOPT; in packet_getsockopt()
3931 return -EFAULT; in packet_getsockopt()
3934 return -EINVAL; in packet_getsockopt()
3938 spin_lock_bh(&sk->sk_receive_queue.lock); in packet_getsockopt()
3939 memcpy(&st, &po->stats, sizeof(st)); in packet_getsockopt()
3940 memset(&po->stats, 0, sizeof(po->stats)); in packet_getsockopt()
3941 spin_unlock_bh(&sk->sk_receive_queue.lock); in packet_getsockopt()
3942 drops = atomic_xchg(&po->tp_drops, 0); in packet_getsockopt()
3944 if (po->tp_version == TPACKET_V3) { in packet_getsockopt()
3958 val = po->auxdata; in packet_getsockopt()
3961 val = po->origdev; in packet_getsockopt()
3964 val = po->has_vnet_hdr; in packet_getsockopt()
3967 val = po->tp_version; in packet_getsockopt()
3973 return -EINVAL; in packet_getsockopt()
3975 return -EFAULT; in packet_getsockopt()
3987 return -EINVAL; in packet_getsockopt()
3991 val = po->tp_reserve; in packet_getsockopt()
3994 val = po->tp_loss; in packet_getsockopt()
3997 val = po->tp_tstamp; in packet_getsockopt()
4000 val = (po->fanout ? in packet_getsockopt()
4001 ((u32)po->fanout->id | in packet_getsockopt()
4002 ((u32)po->fanout->type << 16) | in packet_getsockopt()
4003 ((u32)po->fanout->flags << 24)) : in packet_getsockopt()
4007 if (!po->rollover) in packet_getsockopt()
4008 return -EINVAL; in packet_getsockopt()
4009 rstats.tp_all = atomic_long_read(&po->rollover->num); in packet_getsockopt()
4010 rstats.tp_huge = atomic_long_read(&po->rollover->num_huge); in packet_getsockopt()
4011 rstats.tp_failed = atomic_long_read(&po->rollover->num_failed); in packet_getsockopt()
4016 val = po->tp_tx_has_off; in packet_getsockopt()
4022 return -ENOPROTOOPT; in packet_getsockopt()
4028 return -EFAULT; in packet_getsockopt()
4030 return -EFAULT; in packet_getsockopt()
4039 struct packet_sock *po = pkt_sk(sock->sk); in compat_packet_setsockopt()
4042 return -ENOPROTOOPT; in compat_packet_setsockopt()
4045 po->fanout && po->fanout->type == PACKET_FANOUT_CBPF) { in compat_packet_setsockopt()
4048 return -EFAULT; in compat_packet_setsockopt()
4064 sk_for_each_rcu(sk, &net->packet.sklist) { in packet_notifier()
4069 if (po->mclist) in packet_notifier()
4070 packet_dev_mclist_delete(dev, &po->mclist); in packet_notifier()
4074 if (dev->ifindex == po->ifindex) { in packet_notifier()
4075 spin_lock(&po->bind_lock); in packet_notifier()
4076 if (po->running) { in packet_notifier()
4078 sk->sk_err = ENETDOWN; in packet_notifier()
4080 sk->sk_error_report(sk); in packet_notifier()
4084 po->ifindex = -1; in packet_notifier()
4085 if (po->prot_hook.dev) in packet_notifier()
4086 dev_put(po->prot_hook.dev); in packet_notifier()
4087 po->prot_hook.dev = NULL; in packet_notifier()
4089 spin_unlock(&po->bind_lock); in packet_notifier()
4093 if (dev->ifindex == po->ifindex) { in packet_notifier()
4094 spin_lock(&po->bind_lock); in packet_notifier()
4095 if (po->num) in packet_notifier()
4097 spin_unlock(&po->bind_lock); in packet_notifier()
4110 struct sock *sk = sock->sk; in packet_ioctl()
4124 spin_lock_bh(&sk->sk_receive_queue.lock); in packet_ioctl()
4125 skb = skb_peek(&sk->sk_receive_queue); in packet_ioctl()
4127 amount = skb->len; in packet_ioctl()
4128 spin_unlock_bh(&sk->sk_receive_queue.lock); in packet_ioctl()
4155 return -ENOIOCTLCMD; in packet_ioctl()
4163 struct sock *sk = sock->sk; in packet_poll()
4167 spin_lock_bh(&sk->sk_receive_queue.lock); in packet_poll()
4168 if (po->rx_ring.pg_vec) { in packet_poll()
4169 if (!packet_previous_rx_frame(po, &po->rx_ring, in packet_poll()
4173 if (po->pressure && __packet_rcv_has_room(po, NULL) == ROOM_NORMAL) in packet_poll()
4174 po->pressure = 0; in packet_poll()
4175 spin_unlock_bh(&sk->sk_receive_queue.lock); in packet_poll()
4176 spin_lock_bh(&sk->sk_write_queue.lock); in packet_poll()
4177 if (po->tx_ring.pg_vec) { in packet_poll()
4178 if (packet_current_frame(po, &po->tx_ring, TP_STATUS_AVAILABLE)) in packet_poll()
4181 spin_unlock_bh(&sk->sk_write_queue.lock); in packet_poll()
4192 struct file *file = vma->vm_file; in packet_mm_open()
4193 struct socket *sock = file->private_data; in packet_mm_open()
4194 struct sock *sk = sock->sk; in packet_mm_open()
4197 atomic_inc(&pkt_sk(sk)->mapped); in packet_mm_open()
4202 struct file *file = vma->vm_file; in packet_mm_close()
4203 struct socket *sock = file->private_data; in packet_mm_close()
4204 struct sock *sk = sock->sk; in packet_mm_close()
4207 atomic_dec(&pkt_sk(sk)->mapped); in packet_mm_close()
4260 unsigned int block_nr = req->tp_block_nr; in alloc_pg_vec()
4293 int err = -EINVAL; in packet_set_ring()
4295 struct tpacket_req *req = &req_u->req; in packet_set_ring()
4297 rb = tx_ring ? &po->tx_ring : &po->rx_ring; in packet_set_ring()
4298 rb_queue = tx_ring ? &sk->sk_write_queue : &sk->sk_receive_queue; in packet_set_ring()
4300 err = -EBUSY; in packet_set_ring()
4302 if (atomic_read(&po->mapped)) in packet_set_ring()
4308 if (req->tp_block_nr) { in packet_set_ring()
4312 err = -EBUSY; in packet_set_ring()
4313 if (unlikely(rb->pg_vec)) in packet_set_ring()
4316 switch (po->tp_version) { in packet_set_ring()
4318 po->tp_hdrlen = TPACKET_HDRLEN; in packet_set_ring()
4321 po->tp_hdrlen = TPACKET2_HDRLEN; in packet_set_ring()
4324 po->tp_hdrlen = TPACKET3_HDRLEN; in packet_set_ring()
4328 err = -EINVAL; in packet_set_ring()
4329 if (unlikely((int)req->tp_block_size <= 0)) in packet_set_ring()
4331 if (unlikely(!PAGE_ALIGNED(req->tp_block_size))) in packet_set_ring()
4333 min_frame_size = po->tp_hdrlen + po->tp_reserve; in packet_set_ring()
4334 if (po->tp_version >= TPACKET_V3 && in packet_set_ring()
4335 req->tp_block_size < in packet_set_ring()
4336 BLK_PLUS_PRIV((u64)req_u->req3.tp_sizeof_priv) + min_frame_size) in packet_set_ring()
4338 if (unlikely(req->tp_frame_size < min_frame_size)) in packet_set_ring()
4340 if (unlikely(req->tp_frame_size & (TPACKET_ALIGNMENT - 1))) in packet_set_ring()
4343 rb->frames_per_block = req->tp_block_size / req->tp_frame_size; in packet_set_ring()
4344 if (unlikely(rb->frames_per_block == 0)) in packet_set_ring()
4346 if (unlikely(rb->frames_per_block > UINT_MAX / req->tp_block_nr)) in packet_set_ring()
4348 if (unlikely((rb->frames_per_block * req->tp_block_nr) != in packet_set_ring()
4349 req->tp_frame_nr)) in packet_set_ring()
4352 err = -ENOMEM; in packet_set_ring()
4353 order = get_order(req->tp_block_size); in packet_set_ring()
4357 switch (po->tp_version) { in packet_set_ring()
4363 struct tpacket_req3 *req3 = &req_u->req3; in packet_set_ring()
4365 if (req3->tp_retire_blk_tov || in packet_set_ring()
4366 req3->tp_sizeof_priv || in packet_set_ring()
4367 req3->tp_feature_req_word) { in packet_set_ring()
4368 err = -EINVAL; in packet_set_ring()
4375 rx_owner_map = bitmap_alloc(req->tp_frame_nr, in packet_set_ring()
4385 err = -EINVAL; in packet_set_ring()
4386 if (unlikely(req->tp_frame_nr)) in packet_set_ring()
4392 spin_lock(&po->bind_lock); in packet_set_ring()
4393 was_running = po->running; in packet_set_ring()
4394 num = po->num; in packet_set_ring()
4396 po->num = 0; in packet_set_ring()
4399 spin_unlock(&po->bind_lock); in packet_set_ring()
4403 err = -EBUSY; in packet_set_ring()
4404 mutex_lock(&po->pg_vec_lock); in packet_set_ring()
4405 if (closing || atomic_read(&po->mapped) == 0) { in packet_set_ring()
4407 spin_lock_bh(&rb_queue->lock); in packet_set_ring()
4408 swap(rb->pg_vec, pg_vec); in packet_set_ring()
4409 if (po->tp_version <= TPACKET_V2) in packet_set_ring()
4410 swap(rb->rx_owner_map, rx_owner_map); in packet_set_ring()
4411 rb->frame_max = (req->tp_frame_nr - 1); in packet_set_ring()
4412 rb->head = 0; in packet_set_ring()
4413 rb->frame_size = req->tp_frame_size; in packet_set_ring()
4414 spin_unlock_bh(&rb_queue->lock); in packet_set_ring()
4416 swap(rb->pg_vec_order, order); in packet_set_ring()
4417 swap(rb->pg_vec_len, req->tp_block_nr); in packet_set_ring()
4419 rb->pg_vec_pages = req->tp_block_size/PAGE_SIZE; in packet_set_ring()
4420 po->prot_hook.func = (po->rx_ring.pg_vec) ? in packet_set_ring()
4423 if (atomic_read(&po->mapped)) in packet_set_ring()
4425 atomic_read(&po->mapped)); in packet_set_ring()
4427 mutex_unlock(&po->pg_vec_lock); in packet_set_ring()
4429 spin_lock(&po->bind_lock); in packet_set_ring()
4431 po->num = num; in packet_set_ring()
4434 spin_unlock(&po->bind_lock); in packet_set_ring()
4435 if (pg_vec && (po->tp_version > TPACKET_V2)) { in packet_set_ring()
4436 /* Because we don't support block-based V3 on tx-ring */ in packet_set_ring()
4444 free_pg_vec(pg_vec, order, req->tp_block_nr); in packet_set_ring()
4452 struct sock *sk = sock->sk; in packet_mmap()
4457 int err = -EINVAL; in packet_mmap()
4460 if (vma->vm_pgoff) in packet_mmap()
4461 return -EINVAL; in packet_mmap()
4463 mutex_lock(&po->pg_vec_lock); in packet_mmap()
4466 for (rb = &po->rx_ring; rb <= &po->tx_ring; rb++) { in packet_mmap()
4467 if (rb->pg_vec) { in packet_mmap()
4468 expected_size += rb->pg_vec_len in packet_mmap()
4469 * rb->pg_vec_pages in packet_mmap()
4477 size = vma->vm_end - vma->vm_start; in packet_mmap()
4481 start = vma->vm_start; in packet_mmap()
4482 for (rb = &po->rx_ring; rb <= &po->tx_ring; rb++) { in packet_mmap()
4483 if (rb->pg_vec == NULL) in packet_mmap()
4486 for (i = 0; i < rb->pg_vec_len; i++) { in packet_mmap()
4488 void *kaddr = rb->pg_vec[i].buffer; in packet_mmap()
4491 for (pg_num = 0; pg_num < rb->pg_vec_pages; pg_num++) { in packet_mmap()
4502 atomic_inc(&po->mapped); in packet_mmap()
4503 vma->vm_ops = &packet_mmap_ops; in packet_mmap()
4507 mutex_unlock(&po->pg_vec_lock); in packet_mmap()
4574 return seq_hlist_start_head_rcu(&net->packet.sklist, *pos); in packet_seq_start()
4580 return seq_hlist_next_rcu(v, &net->packet.sklist, pos); in packet_seq_next()
4598 "%pK %-6d %-4d %04x %-5d %1d %-6u %-6u %-6lu\n", in packet_seq_show()
4600 refcount_read(&s->sk_refcnt), in packet_seq_show()
4601 s->sk_type, in packet_seq_show()
4602 ntohs(po->num), in packet_seq_show()
4603 po->ifindex, in packet_seq_show()
4604 po->running, in packet_seq_show()
4605 atomic_read(&s->sk_rmem_alloc), in packet_seq_show()
4623 mutex_init(&net->packet.sklist_lock); in packet_net_init()
4624 INIT_HLIST_HEAD(&net->packet.sklist); in packet_net_init()
4626 if (!proc_create_net("packet", 0, net->proc_net, &packet_seq_ops, in packet_net_init()
4628 return -ENOMEM; in packet_net_init()
4635 remove_proc_entry("packet", net->proc_net); in packet_net_exit()
4636 WARN_ON_ONCE(!hlist_empty(&net->packet.sklist)); in packet_net_exit()