int sidtab_context_to_sid(struct sidtab *s,
struct context *context,
u32 *out_sid)
{
u32 sid;
int ret = 0;
*out_sid = SECSID_NULL;
sid = sidtab_search_context(s, context);
if (!sid) {
SIDTAB_LOCK(s);
/* Rescan now that we hold the lock. */
sid = sidtab_search_context(s, context);
if (sid)
goto unlock_out;
/* No SID exists for the context. Allocate a new one. */
if (s->next_sid == UINT_MAX || s->shutdown) {
ret = -ENOMEM;
goto unlock_out;
}
sid = s->next_sid++;
ret = sidtab_insert(s, sid, context);
if (ret)
s->next_sid--;
unlock_out:
SIDTAB_UNLOCK(s);
}
if (ret)
return ret;
*out_sid = sid;
return 0;
}
void sidtab_shutdown(struct sidtab *s)
{
unsigned long flags;
SIDTAB_LOCK(s, flags);
s->shutdown = 1;
SIDTAB_UNLOCK(s, flags);
}
void sidtab_set(struct sidtab *dst, struct sidtab *src)
{
SIDTAB_LOCK(src);
dst->htable = src->htable;
dst->nel = src->nel;
dst->next_sid = src->next_sid;
dst->shutdown = 0;
SIDTAB_UNLOCK(src);
}
void sidtab_set(struct sidtab *dst, struct sidtab *src)
{
unsigned long flags;
SIDTAB_LOCK(src, flags);
dst->htable = src->htable;
dst->nel = src->nel;
dst->next_sid = src->next_sid;
dst->shutdown = 0;
SIDTAB_UNLOCK(src, flags);
}
void sidtab_shutdown(struct sidtab *s)
{
SIDTAB_LOCK(s);
s->shutdown = 1;
SIDTAB_UNLOCK(s);
}