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MINOR: counters: provide a generic function to retrieve a stkctr for sc* and src.

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This function aims at simplifying the prefetching of the table and entry
when using any of the session counters fetches. The principle is that the
src_* variant produces a stkctr that is used instead of the one from the
session. That way we can call the same function from all session counter
fetch functions and always have a single function to support sc[0-9]_/src_.
This commit is contained in:
Willy Tarreau 2013-07-22 22:40:11 +02:00
parent 88821241d4
commit a65536ca4e
1 changed files with 27 additions and 0 deletions
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27
src/session.c
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@ -2578,6 +2578,33 @@ void session_shutdown(struct session *session, int why)
/* All supported ACL keywords must be declared here. */
/************************************************************************/
/* Returns a pointer to an stkctr depending on the fetch keyword name.
* It is designed to be called as sc[0-9]_* or src_* exclusively.
* sc[0-9]_* will return a pointer to the respective field in the
* session <l4>. src_* will fill a locally allocated structure with
* the table and entry corresponding to what is specified with src_*.
* NULL may be returned if the designated stkctr is not tracked.
*/
static struct stkctr *
smp_fetch_sc_stkctr(struct session *l4, const struct arg *args, const char *kw)
{
static struct stkctr stkctr;
unsigned char num = kw[2];
if (num - '0' <= 9) { /* sc[0-9]_* variant */
return l4->stkctr[num - '0'].entry ? &l4->stkctr[num - '0'] : NULL;
}
else { /* src_* variant, arg[0] = table */
struct stktable_key *key = addr_to_stktable_key(&l4->si[0].conn->addr.from);
if (!key)
return NULL;
stkctr.table = &args->data.prx->table;
stkctr.entry = stktable_lookup_key(stkctr.table, key);
return &stkctr;
}
}
/* set return a boolean indicating if the requested session counter is
* currently being tracked or not.
* Supports being called as "sc[0-9]_tracked" only.