/* * Kernel Connection Multiplexor * * Copyright (c) 2016 Tom Herbert <tom@herbertland.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. */ #ifndef __NET_KCM_H_ #define __NET_KCM_H_ #include <linux/skbuff.h> #include <net/sock.h> #include <uapi/linux/kcm.h> extern unsigned int kcm_net_id; #define KCM_STATS_ADD(stat, count) ((stat) += (count)) #define KCM_STATS_INCR(stat) ((stat)++) struct kcm_psock_stats { unsigned long long rx_msgs; unsigned long long rx_bytes; unsigned long long tx_msgs; unsigned long long tx_bytes; unsigned int rx_aborts; unsigned int rx_mem_fail; unsigned int rx_need_more_hdr; unsigned int rx_msg_too_big; unsigned int rx_msg_timeouts; unsigned int rx_bad_hdr_len; unsigned long long reserved; unsigned long long unreserved; unsigned int tx_aborts; }; struct kcm_mux_stats { unsigned long long rx_msgs; unsigned long long rx_bytes; unsigned long long tx_msgs; unsigned long long tx_bytes; unsigned int rx_ready_drops; unsigned int tx_retries; unsigned int psock_attach; unsigned int psock_unattach_rsvd; unsigned int psock_unattach; }; struct kcm_stats { unsigned long long rx_msgs; unsigned long long rx_bytes; unsigned long long tx_msgs; unsigned long long tx_bytes; }; struct kcm_tx_msg { unsigned int sent; unsigned int fragidx; unsigned int frag_offset; unsigned int msg_flags; struct sk_buff *frag_skb; struct sk_buff *last_skb; }; struct kcm_rx_msg { int full_len; int accum_len; int offset; int early_eaten; }; /* Socket structure for KCM client sockets */ struct kcm_sock { struct sock sk; struct kcm_mux *mux; struct list_head kcm_sock_list; int index; u32 done : 1; struct work_struct done_work; struct kcm_stats stats; /* Transmit */ struct kcm_psock *tx_psock; struct work_struct tx_work; struct list_head wait_psock_list; struct sk_buff *seq_skb; /* Don't use bit fields here, these are set under different locks */ bool tx_wait; bool tx_wait_more; /* Receive */ struct kcm_psock *rx_psock; struct list_head wait_rx_list; /* KCMs waiting for receiving */ bool rx_wait; u32 rx_disabled : 1; }; struct bpf_prog; /* Structure for an attached lower socket */ struct kcm_psock { struct sock *sk; struct kcm_mux *mux; int index; u32 tx_stopped : 1; u32 rx_stopped : 1; u32 done : 1; u32 unattaching : 1; void (*save_state_change)(struct sock *sk); void (*save_data_ready)(struct sock *sk); void (*save_write_space)(struct sock *sk); struct list_head psock_list; struct kcm_psock_stats stats; /* Receive */ struct sk_buff *rx_skb_head; struct sk_buff **rx_skb_nextp; struct sk_buff *ready_rx_msg; struct list_head psock_ready_list; struct work_struct rx_work; struct delayed_work rx_delayed_work; struct bpf_prog *bpf_prog; struct kcm_sock *rx_kcm; unsigned long long saved_rx_bytes; unsigned long long saved_rx_msgs; struct timer_list rx_msg_timer; unsigned int rx_need_bytes; /* Transmit */ struct kcm_sock *tx_kcm; struct list_head psock_avail_list; unsigned long long saved_tx_bytes; unsigned long long saved_tx_msgs; }; /* Per net MUX list */ struct kcm_net { struct mutex mutex; struct kcm_psock_stats aggregate_psock_stats; struct kcm_mux_stats aggregate_mux_stats; struct list_head mux_list; int count; }; /* Structure for a MUX */ struct kcm_mux { struct list_head kcm_mux_list; struct rcu_head rcu; struct kcm_net *knet; struct list_head kcm_socks; /* All KCM sockets on MUX */ int kcm_socks_cnt; /* Total KCM socket count for MUX */ struct list_head psocks; /* List of all psocks on MUX */ int psocks_cnt; /* Total attached sockets */ struct kcm_mux_stats stats; struct kcm_psock_stats aggregate_psock_stats; /* Receive */ spinlock_t rx_lock ____cacheline_aligned_in_smp; struct list_head kcm_rx_waiters; /* KCMs waiting for receiving */ struct list_head psocks_ready; /* List of psocks with a msg ready */ struct sk_buff_head rx_hold_queue; /* Transmit */ spinlock_t lock ____cacheline_aligned_in_smp; /* TX and mux locking */ struct list_head psocks_avail; /* List of available psocks */ struct list_head kcm_tx_waiters; /* KCMs waiting for a TX psock */ }; #ifdef CONFIG_PROC_FS int kcm_proc_init(void); void kcm_proc_exit(void); #else
static inline int kcm_proc_init(void) { return 0; }Contributors
| Person | Tokens | Prop | Commits | CommitProp | |
| tom herbert | tom herbert | 11 | 91.67% | 1 | 50.00% |
| arnd bergmann | arnd bergmann | 1 | 8.33% | 1 | 50.00% |
| Total | 12 | 100.00% | 2 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp | |
| tom herbert | tom herbert | 7 | 87.50% | 1 | 50.00% |
| arnd bergmann | arnd bergmann | 1 | 12.50% | 1 | 50.00% |
| Total | 8 | 100.00% | 2 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp | |
| tom herbert | tom herbert | 93 | 100.00% | 3 | 100.00% |
| Total | 93 | 100.00% | 3 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp | |
| tom herbert | tom herbert | 68 | 100.00% | 1 | 100.00% |
| Total | 68 | 100.00% | 1 | 100.00% |
| Person | Tokens | Prop | Commits | CommitProp | |
| tom herbert | tom herbert | 767 | 99.74% | 4 | 80.00% |
| arnd bergmann | arnd bergmann | 2 | 0.26% | 1 | 20.00% |
| Total | 769 | 100.00% | 5 | 100.00% |