forked from luck/tmp_suning_uos_patched
96a5908347
kcm and strparser need to work with any type of stream socket not just TCP. Eliminate references to TCP and call generic proto_ops functions of read_sock and peek_len. Also in strp_init check if the socket support the proto_ops read_sock and peek_len. Signed-off-by: Tom Herbert <tom@herbertland.com> Signed-off-by: David S. Miller <davem@davemloft.net>
143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/*
|
|
* Stream Parser
|
|
*
|
|
* 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_STRPARSER_H_
|
|
#define __NET_STRPARSER_H_
|
|
|
|
#include <linux/skbuff.h>
|
|
#include <net/sock.h>
|
|
|
|
#define STRP_STATS_ADD(stat, count) ((stat) += (count))
|
|
#define STRP_STATS_INCR(stat) ((stat)++)
|
|
|
|
struct strp_stats {
|
|
unsigned long long rx_msgs;
|
|
unsigned long long rx_bytes;
|
|
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;
|
|
};
|
|
|
|
struct strp_aggr_stats {
|
|
unsigned long long rx_msgs;
|
|
unsigned long long rx_bytes;
|
|
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 int rx_aborts;
|
|
unsigned int rx_interrupted;
|
|
unsigned int rx_unrecov_intr;
|
|
};
|
|
|
|
struct strparser;
|
|
|
|
/* Callbacks are called with lock held for the attached socket */
|
|
struct strp_callbacks {
|
|
int (*parse_msg)(struct strparser *strp, struct sk_buff *skb);
|
|
void (*rcv_msg)(struct strparser *strp, struct sk_buff *skb);
|
|
int (*read_sock_done)(struct strparser *strp, int err);
|
|
void (*abort_parser)(struct strparser *strp, int err);
|
|
};
|
|
|
|
struct strp_rx_msg {
|
|
int full_len;
|
|
int offset;
|
|
};
|
|
|
|
static inline struct strp_rx_msg *strp_rx_msg(struct sk_buff *skb)
|
|
{
|
|
return (struct strp_rx_msg *)((void *)skb->cb +
|
|
offsetof(struct qdisc_skb_cb, data));
|
|
}
|
|
|
|
/* Structure for an attached lower socket */
|
|
struct strparser {
|
|
struct sock *sk;
|
|
|
|
u32 rx_stopped : 1;
|
|
u32 rx_paused : 1;
|
|
u32 rx_aborted : 1;
|
|
u32 rx_interrupted : 1;
|
|
u32 rx_unrecov_intr : 1;
|
|
|
|
struct sk_buff **rx_skb_nextp;
|
|
struct timer_list rx_msg_timer;
|
|
struct sk_buff *rx_skb_head;
|
|
unsigned int rx_need_bytes;
|
|
struct delayed_work rx_delayed_work;
|
|
struct work_struct rx_work;
|
|
struct strp_stats stats;
|
|
struct strp_callbacks cb;
|
|
};
|
|
|
|
/* Must be called with lock held for attached socket */
|
|
static inline void strp_pause(struct strparser *strp)
|
|
{
|
|
strp->rx_paused = 1;
|
|
}
|
|
|
|
/* May be called without holding lock for attached socket */
|
|
void strp_unpause(struct strparser *strp);
|
|
|
|
static inline void save_strp_stats(struct strparser *strp,
|
|
struct strp_aggr_stats *agg_stats)
|
|
{
|
|
/* Save psock statistics in the mux when psock is being unattached. */
|
|
|
|
#define SAVE_PSOCK_STATS(_stat) (agg_stats->_stat += \
|
|
strp->stats._stat)
|
|
SAVE_PSOCK_STATS(rx_msgs);
|
|
SAVE_PSOCK_STATS(rx_bytes);
|
|
SAVE_PSOCK_STATS(rx_mem_fail);
|
|
SAVE_PSOCK_STATS(rx_need_more_hdr);
|
|
SAVE_PSOCK_STATS(rx_msg_too_big);
|
|
SAVE_PSOCK_STATS(rx_msg_timeouts);
|
|
SAVE_PSOCK_STATS(rx_bad_hdr_len);
|
|
#undef SAVE_PSOCK_STATS
|
|
|
|
if (strp->rx_aborted)
|
|
agg_stats->rx_aborts++;
|
|
if (strp->rx_interrupted)
|
|
agg_stats->rx_interrupted++;
|
|
if (strp->rx_unrecov_intr)
|
|
agg_stats->rx_unrecov_intr++;
|
|
}
|
|
|
|
static inline void aggregate_strp_stats(struct strp_aggr_stats *stats,
|
|
struct strp_aggr_stats *agg_stats)
|
|
{
|
|
#define SAVE_PSOCK_STATS(_stat) (agg_stats->_stat += stats->_stat)
|
|
SAVE_PSOCK_STATS(rx_msgs);
|
|
SAVE_PSOCK_STATS(rx_bytes);
|
|
SAVE_PSOCK_STATS(rx_mem_fail);
|
|
SAVE_PSOCK_STATS(rx_need_more_hdr);
|
|
SAVE_PSOCK_STATS(rx_msg_too_big);
|
|
SAVE_PSOCK_STATS(rx_msg_timeouts);
|
|
SAVE_PSOCK_STATS(rx_bad_hdr_len);
|
|
SAVE_PSOCK_STATS(rx_aborts);
|
|
SAVE_PSOCK_STATS(rx_interrupted);
|
|
SAVE_PSOCK_STATS(rx_unrecov_intr);
|
|
#undef SAVE_PSOCK_STATS
|
|
|
|
}
|
|
|
|
void strp_done(struct strparser *strp);
|
|
void strp_stop(struct strparser *strp);
|
|
void strp_check_rcv(struct strparser *strp);
|
|
int strp_init(struct strparser *strp, struct sock *csk,
|
|
struct strp_callbacks *cb);
|
|
void strp_data_ready(struct strparser *strp);
|
|
|
|
#endif /* __NET_STRPARSER_H_ */
|