get rid of cred argument of vfs_open() and do_dentry_open()
[muen/linux.git] / net / packet / internal.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __PACKET_INTERNAL_H__
3 #define __PACKET_INTERNAL_H__
4
5 #include <linux/refcount.h>
6
7 struct packet_mclist {
8         struct packet_mclist    *next;
9         int                     ifindex;
10         int                     count;
11         unsigned short          type;
12         unsigned short          alen;
13         unsigned char           addr[MAX_ADDR_LEN];
14 };
15
16 /* kbdq - kernel block descriptor queue */
17 struct tpacket_kbdq_core {
18         struct pgv      *pkbdq;
19         unsigned int    feature_req_word;
20         unsigned int    hdrlen;
21         unsigned char   reset_pending_on_curr_blk;
22         unsigned char   delete_blk_timer;
23         unsigned short  kactive_blk_num;
24         unsigned short  blk_sizeof_priv;
25
26         /* last_kactive_blk_num:
27          * trick to see if user-space has caught up
28          * in order to avoid refreshing timer when every single pkt arrives.
29          */
30         unsigned short  last_kactive_blk_num;
31
32         char            *pkblk_start;
33         char            *pkblk_end;
34         int             kblk_size;
35         unsigned int    max_frame_len;
36         unsigned int    knum_blocks;
37         uint64_t        knxt_seq_num;
38         char            *prev;
39         char            *nxt_offset;
40         struct sk_buff  *skb;
41
42         atomic_t        blk_fill_in_prog;
43
44         /* Default is set to 8ms */
45 #define DEFAULT_PRB_RETIRE_TOV  (8)
46
47         unsigned short  retire_blk_tov;
48         unsigned short  version;
49         unsigned long   tov_in_jiffies;
50
51         /* timer to retire an outstanding block */
52         struct timer_list retire_blk_timer;
53 };
54
55 struct pgv {
56         char *buffer;
57 };
58
59 struct packet_ring_buffer {
60         struct pgv              *pg_vec;
61
62         unsigned int            head;
63         unsigned int            frames_per_block;
64         unsigned int            frame_size;
65         unsigned int            frame_max;
66
67         unsigned int            pg_vec_order;
68         unsigned int            pg_vec_pages;
69         unsigned int            pg_vec_len;
70
71         unsigned int __percpu   *pending_refcnt;
72
73         struct tpacket_kbdq_core        prb_bdqc;
74 };
75
76 extern struct mutex fanout_mutex;
77 #define PACKET_FANOUT_MAX       256
78
79 struct packet_fanout {
80         possible_net_t          net;
81         unsigned int            num_members;
82         u16                     id;
83         u8                      type;
84         u8                      flags;
85         union {
86                 atomic_t                rr_cur;
87                 struct bpf_prog __rcu   *bpf_prog;
88         };
89         struct list_head        list;
90         struct sock             *arr[PACKET_FANOUT_MAX];
91         spinlock_t              lock;
92         refcount_t              sk_ref;
93         struct packet_type      prot_hook ____cacheline_aligned_in_smp;
94 };
95
96 struct packet_rollover {
97         int                     sock;
98         atomic_long_t           num;
99         atomic_long_t           num_huge;
100         atomic_long_t           num_failed;
101 #define ROLLOVER_HLEN   (L1_CACHE_BYTES / sizeof(u32))
102         u32                     history[ROLLOVER_HLEN] ____cacheline_aligned;
103 } ____cacheline_aligned_in_smp;
104
105 struct packet_sock {
106         /* struct sock has to be the first member of packet_sock */
107         struct sock             sk;
108         struct packet_fanout    *fanout;
109         union  tpacket_stats_u  stats;
110         struct packet_ring_buffer       rx_ring;
111         struct packet_ring_buffer       tx_ring;
112         int                     copy_thresh;
113         spinlock_t              bind_lock;
114         struct mutex            pg_vec_lock;
115         unsigned int            running;        /* bind_lock must be held */
116         unsigned int            auxdata:1,      /* writer must hold sock lock */
117                                 origdev:1,
118                                 has_vnet_hdr:1,
119                                 tp_loss:1,
120                                 tp_tx_has_off:1;
121         int                     pressure;
122         int                     ifindex;        /* bound device         */
123         __be16                  num;
124         struct packet_rollover  *rollover;
125         struct packet_mclist    *mclist;
126         atomic_t                mapped;
127         enum tpacket_versions   tp_version;
128         unsigned int            tp_hdrlen;
129         unsigned int            tp_reserve;
130         unsigned int            tp_tstamp;
131         struct net_device __rcu *cached_dev;
132         int                     (*xmit)(struct sk_buff *skb);
133         struct packet_type      prot_hook ____cacheline_aligned_in_smp;
134 };
135
136 static struct packet_sock *pkt_sk(struct sock *sk)
137 {
138         return (struct packet_sock *)sk;
139 }
140
141 #endif