136 lines
4.5 KiB
C
136 lines
4.5 KiB
C
/*
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* include/proto/stick_table.h
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* Functions for stick tables management.
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*
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* Copyright (C) 2009-2010 EXCELIANCE, Emeric Brun <ebrun@exceliance.fr>
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* Copyright (C) 2010 Willy Tarreau <w@1wt.eu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation, version 2.1
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* exclusively.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _PROTO_STICK_TABLE_H
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#define _PROTO_STICK_TABLE_H
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#include <common/errors.h>
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#include <common/ticks.h>
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#include <common/time.h>
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#include <types/stick_table.h>
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#define stktable_data_size(type) (sizeof(((union stktable_data*)0)->type))
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#define stktable_data_cast(ptr, type) ((union stktable_data*)(ptr))->type
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extern struct stktable_key static_table_key;
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struct stksess *stksess_new(struct stktable *t, struct stktable_key *key);
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void stksess_setkey(struct stktable *t, struct stksess *ts, struct stktable_key *key);
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void stksess_free(struct stktable *t, struct stksess *ts);
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void stksess_kill(struct stktable *t, struct stksess *ts);
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int stktable_init(struct stktable *t);
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int stktable_parse_type(char **args, int *idx, unsigned long *type, size_t *key_size);
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struct stksess *stktable_get_entry(struct stktable *table, struct stktable_key *key);
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struct stksess *stktable_store(struct stktable *t, struct stksess *ts, int local);
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struct stksess *stktable_touch(struct stktable *t, struct stksess *ts, int local);
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struct stksess *stktable_lookup(struct stktable *t, struct stksess *ts);
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struct stksess *stktable_lookup_key(struct stktable *t, struct stktable_key *key);
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struct stksess *stktable_update_key(struct stktable *table, struct stktable_key *key);
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struct stktable_key *stktable_fetch_key(struct stktable *t, struct proxy *px,
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struct session *l4, void *l7, int dir,
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struct pattern_expr *expr);
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int stktable_compatible_pattern(struct pattern_expr *expr, unsigned long table_type);
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int stktable_get_data_type(char *name);
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struct proxy *find_stktable(const char *name);
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/* return allocation size for standard data type <type> */
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static inline int stktable_type_size(int type)
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{
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switch(type) {
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case STD_T_SINT:
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case STD_T_UINT:
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return sizeof(int);
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case STD_T_ULL:
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return sizeof(unsigned long long);
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case STD_T_FRQP:
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return sizeof(struct freq_ctr_period);
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}
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return 0;
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}
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/* reserve some space for data type <type>, and associate argument at <sa> if
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* not NULL. Returns PE_NONE (0) if OK or an error code among :
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* - PE_ENUM_OOR if <type> does not exist
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* - PE_EXIST if <type> is already registered
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* - PE_ARG_NOT_USE if <sa> was provided but not expected
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* - PE_ARG_MISSING if <sa> was expected but not provided
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*/
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static inline int stktable_alloc_data_type(struct stktable *t, int type, const char *sa)
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{
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if (type >= STKTABLE_DATA_TYPES)
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return PE_ENUM_OOR;
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if (t->data_ofs[type])
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/* already allocated */
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return PE_EXIST;
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switch (stktable_data_types[type].arg_type) {
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case ARG_T_NONE:
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if (sa)
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return PE_ARG_NOT_USED;
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break;
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case ARG_T_INT:
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if (!sa)
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return PE_ARG_MISSING;
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t->data_arg[type].i = atoi(sa);
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break;
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case ARG_T_DELAY:
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if (!sa)
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return PE_ARG_MISSING;
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sa = parse_time_err(sa, &t->data_arg[type].u, TIME_UNIT_MS);
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if (sa)
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return PE_ARG_INVC; /* invalid char */
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break;
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}
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t->data_size += stktable_type_size(stktable_data_types[type].std_type);
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t->data_ofs[type] = -t->data_size;
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return PE_NONE;
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}
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/* return pointer for data type <type> in sticky session <ts> of table <t>, or
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* NULL if either <ts> is NULL or the type is not stored.
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*/
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static inline void *stktable_data_ptr(struct stktable *t, struct stksess *ts, int type)
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{
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if (type >= STKTABLE_DATA_TYPES)
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return NULL;
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if (!t->data_ofs[type]) /* type not stored */
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return NULL;
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if (!ts)
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return NULL;
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return (void *)ts + t->data_ofs[type];
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}
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/* kill an entry if it's expired and its ref_cnt is zero */
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static inline void stksess_kill_if_expired(struct stktable *t, struct stksess *ts)
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{
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if (t->expire != TICK_ETERNITY && tick_is_expired(ts->expire, now_ms))
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stksess_kill(t, ts);
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}
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#endif /* _PROTO_STICK_TABLE_H */
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