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gerrit-public.fairphone.software / kernel / msm-4.9 / c1e34b64044318dde74a4cec24a91ff6415f1c48 / . / net / packet / internal.h
blob: cdddf6a303996b1a512a7a3896362acc31635f0e [file] [log] [blame]
Pavel Emelyanov2787b042012-08-13 05:49:39 +0000[diff] [blame]1#ifndef __PACKET_INTERNAL_H__
2#define __PACKET_INTERNAL_H__
3
4struct packet_mclist {
5 struct packet_mclist *next;
6 int ifindex;
7 int count;
8 unsigned short type;
9 unsigned short alen;
10 unsigned char addr[MAX_ADDR_LEN];
11};
12
13/* kbdq - kernel block descriptor queue */
14struct tpacket_kbdq_core {
15 struct pgv *pkbdq;
16 unsigned int feature_req_word;
17 unsigned int hdrlen;
18 unsigned char reset_pending_on_curr_blk;
19 unsigned char delete_blk_timer;
20 unsigned short kactive_blk_num;
21 unsigned short blk_sizeof_priv;
22
23 /* last_kactive_blk_num:
24 * trick to see if user-space has caught up
25 * in order to avoid refreshing timer when every single pkt arrives.
26 */
27 unsigned short last_kactive_blk_num;
28
29 char *pkblk_start;
30 char *pkblk_end;
31 int kblk_size;
Eric Dumazetdc808112014-08-15 09:16:04 -0700[diff] [blame]32 unsigned int max_frame_len;
Pavel Emelyanov2787b042012-08-13 05:49:39 +0000[diff] [blame]33 unsigned int knum_blocks;
34 uint64_t knxt_seq_num;
35 char *prev;
36 char *nxt_offset;
37 struct sk_buff *skb;
38
39 atomic_t blk_fill_in_prog;
40
41 /* Default is set to 8ms */
42#define DEFAULT_PRB_RETIRE_TOV (8)
43
44 unsigned short retire_blk_tov;
45 unsigned short version;
46 unsigned long tov_in_jiffies;
47
48 /* timer to retire an outstanding block */
49 struct timer_list retire_blk_timer;
50};
51
52struct pgv {
53 char *buffer;
54};
55
56struct packet_ring_buffer {
57 struct pgv *pg_vec;
Daniel Borkmann0578edc2013-04-19 06:12:28 +0000[diff] [blame]58
Pavel Emelyanov2787b042012-08-13 05:49:39 +0000[diff] [blame]59 unsigned int head;
60 unsigned int frames_per_block;
61 unsigned int frame_size;
62 unsigned int frame_max;
63
64 unsigned int pg_vec_order;
65 unsigned int pg_vec_pages;
66 unsigned int pg_vec_len;
67
Daniel Borkmannb0138402014-01-15 16:25:36 +0100[diff] [blame]68 unsigned int __percpu *pending_refcnt;
Daniel Borkmann0578edc2013-04-19 06:12:28 +0000[diff] [blame]69
70 struct tpacket_kbdq_core prb_bdqc;
Pavel Emelyanov2787b042012-08-13 05:49:39 +0000[diff] [blame]71};
72
Pavel Emelyanovfff33212012-08-16 05:36:48 +0000[diff] [blame]73extern struct mutex fanout_mutex;
74#define PACKET_FANOUT_MAX 256
75
76struct packet_fanout {
77#ifdef CONFIG_NET_NS
78 struct net *net;
79#endif
80 unsigned int num_members;
81 u16 id;
82 u8 type;
Willem de Bruijn77f65eb2013-03-19 10:18:11 +0000[diff] [blame]83 u8 flags;
Pavel Emelyanovfff33212012-08-16 05:36:48 +0000[diff] [blame]84 atomic_t rr_cur;
85 struct list_head list;
86 struct sock *arr[PACKET_FANOUT_MAX];
Willem de Bruijn77f65eb2013-03-19 10:18:11 +0000[diff] [blame]87 int next[PACKET_FANOUT_MAX];
Pavel Emelyanovfff33212012-08-16 05:36:48 +0000[diff] [blame]88 spinlock_t lock;
89 atomic_t sk_ref;
90 struct packet_type prot_hook ____cacheline_aligned_in_smp;
91};
92
Pavel Emelyanov2787b042012-08-13 05:49:39 +0000[diff] [blame]93struct packet_sock {
94 /* struct sock has to be the first member of packet_sock */
95 struct sock sk;
96 struct packet_fanout *fanout;
Daniel Borkmannee80fbf2013-04-19 06:12:29 +0000[diff] [blame]97 union tpacket_stats_u stats;
Pavel Emelyanov2787b042012-08-13 05:49:39 +0000[diff] [blame]98 struct packet_ring_buffer rx_ring;
99 struct packet_ring_buffer tx_ring;
100 int copy_thresh;
101 spinlock_t bind_lock;
102 struct mutex pg_vec_lock;
103 unsigned int running:1, /* prot_hook is attached*/
104 auxdata:1,
105 origdev:1,
106 has_vnet_hdr:1;
107 int ifindex; /* bound device */
108 __be16 num;
109 struct packet_mclist *mclist;
110 atomic_t mapped;
111 enum tpacket_versions tp_version;
112 unsigned int tp_hdrlen;
113 unsigned int tp_reserve;
114 unsigned int tp_loss:1;
Paul Chavent5920cd3a2012-11-06 23:10:47 +0000[diff] [blame]115 unsigned int tp_tx_has_off:1;
Pavel Emelyanov2787b042012-08-13 05:49:39 +0000[diff] [blame]116 unsigned int tp_tstamp;
Daniel Borkmanne40526c2013-11-21 16:50:58 +0100[diff] [blame]117 struct net_device __rcu *cached_dev;
Daniel Borkmannd346a3f2013-12-06 11:36:17 +0100[diff] [blame]118 int (*xmit)(struct sk_buff *skb);
Pavel Emelyanov2787b042012-08-13 05:49:39 +0000[diff] [blame]119 struct packet_type prot_hook ____cacheline_aligned_in_smp;
120};
121
122static struct packet_sock *pkt_sk(struct sock *sk)
123{
124 return (struct packet_sock *)sk;
125}
126
127#endif