mirror of
https://passt.top/passt
synced 2024-06-30 15:02:40 +00:00
fb7c00169d
In general, the passt code is a bit haphazard about what's a true global variable and what's in the quasi-global 'context structure'. The flow_count field is one such example: it's in the context structure, although it's really part of the same data structure as flowtab[], which is a genuine global. Move flow_count to be a regular global to match. For now it needs to be public, rather than static, but we expect to be able to change that in future. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
|
|
* Copyright Red Hat
|
|
* Author: David Gibson <david@gibson.dropbear.id.au>
|
|
*
|
|
* Tracking for logical "flows" of packets.
|
|
*/
|
|
#ifndef FLOW_H
|
|
#define FLOW_H
|
|
|
|
#define FLOW_TIMER_INTERVAL 1000 /* ms */
|
|
|
|
/**
|
|
* enum flow_type - Different types of packet flows we track
|
|
*/
|
|
enum flow_type {
|
|
/* Represents an invalid or unused flow */
|
|
FLOW_TYPE_NONE = 0,
|
|
/* A TCP connection between a socket and tap interface */
|
|
FLOW_TCP,
|
|
/* A TCP connection between a host socket and ns socket */
|
|
FLOW_TCP_SPLICE,
|
|
|
|
FLOW_NUM_TYPES,
|
|
};
|
|
|
|
extern const char *flow_type_str[];
|
|
#define FLOW_TYPE(f) \
|
|
((f)->type < FLOW_NUM_TYPES ? flow_type_str[(f)->type] : "?")
|
|
|
|
/**
|
|
* struct flow_common - Common fields for packet flows
|
|
* @type: Type of packet flow
|
|
*/
|
|
struct flow_common {
|
|
uint8_t type;
|
|
};
|
|
|
|
#define FLOW_INDEX_BITS 17 /* 128k - 1 */
|
|
#define FLOW_MAX MAX_FROM_BITS(FLOW_INDEX_BITS)
|
|
|
|
#define FLOW_TABLE_PRESSURE 30 /* % of FLOW_MAX */
|
|
#define FLOW_FILE_PRESSURE 30 /* % of c->nofile */
|
|
|
|
/**
|
|
* struct flow_sidx - ID for one side of a specific flow
|
|
* @side: Side referenced (0 or 1)
|
|
* @flow: Index of flow referenced
|
|
*/
|
|
typedef struct flow_sidx {
|
|
unsigned side :1;
|
|
unsigned flow :FLOW_INDEX_BITS;
|
|
} flow_sidx_t;
|
|
static_assert(sizeof(flow_sidx_t) <= sizeof(uint32_t),
|
|
"flow_sidx_t must fit within 32 bits");
|
|
|
|
#define FLOW_SIDX_NONE ((flow_sidx_t){ .flow = FLOW_MAX })
|
|
|
|
/**
|
|
* flow_sidx_eq() - Test if two sidx values are equal
|
|
* @a, @b: sidx values
|
|
*
|
|
* Return: true iff @a and @b refer to the same side of the same flow
|
|
*/
|
|
static inline bool flow_sidx_eq(flow_sidx_t a, flow_sidx_t b)
|
|
{
|
|
return (a.flow == b.flow) && (a.side == b.side);
|
|
}
|
|
|
|
union flow;
|
|
|
|
void flow_table_compact(const struct ctx *c, union flow *hole);
|
|
void flow_defer_handler(const struct ctx *c, const struct timespec *now);
|
|
|
|
void flow_log_(const struct flow_common *f, int pri, const char *fmt, ...)
|
|
__attribute__((format(printf, 3, 4)));
|
|
|
|
#define flow_log(f_, pri, ...) flow_log_(&(f_)->f, (pri), __VA_ARGS__)
|
|
|
|
#define flow_dbg(f, ...) flow_log((f), LOG_DEBUG, __VA_ARGS__)
|
|
#define flow_err(f, ...) flow_log((f), LOG_ERR, __VA_ARGS__)
|
|
|
|
#define flow_trace(f, ...) \
|
|
do { \
|
|
if (log_trace) \
|
|
flow_dbg((f), __VA_ARGS__); \
|
|
} while (0)
|
|
|
|
#endif /* FLOW_H */
|