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o restructure initialization code so data structures are setup

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when loaded as a module
o cleanup data structures on module unload when no application has
  been started (i.e. kldload, kldunload w/o mrtd)
o remove extraneous unlocks immediately prior to destroying them

Supported by:	FreeBSD Foundation
This commit is contained in:
Sam Leffler 2003-10-24 00:09:18 +00:00
parent 37bdc2803f
commit ac6b0748be
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=121446
1 changed files with 34 additions and 22 deletions
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56
sys/netinet/ip_mroute.c
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@ -584,6 +584,27 @@ get_vif_cnt(struct sioc_vif_req *req)
return 0;
}
static void
ip_mrouter_reset(void)
{
bzero((caddr_t)mfctable, sizeof(mfctable));
MFC_LOCK_INIT();
VIF_LOCK_INIT();
bzero((caddr_t)nexpire, sizeof(nexpire));
pim_assert = 0;
mrt_api_config = 0;
callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE);
bw_upcalls_n = 0;
bzero((caddr_t)bw_meter_timers, sizeof(bw_meter_timers));
callout_init(&bw_upcalls_ch, CALLOUT_MPSAFE);
callout_init(&bw_meter_ch, CALLOUT_MPSAFE);
callout_init(&tbf_reprocess_ch, CALLOUT_MPSAFE);
}
/*
* Enable multicast routing
*/
@ -603,29 +624,15 @@ ip_mrouter_init(struct socket *so, int version)
if (ip_mrouter != NULL)
return EADDRINUSE;
ip_mrouter = so;
ip_mrouter_reset();
bzero((caddr_t)mfctable, sizeof(mfctable));
MFC_LOCK_INIT();
VIF_LOCK_INIT();
bzero((caddr_t)nexpire, sizeof(nexpire));
pim_assert = 0;
callout_init(&expire_upcalls_ch, CALLOUT_MPSAFE);
callout_reset(&expire_upcalls_ch, EXPIRE_TIMEOUT, expire_upcalls, NULL);
bw_upcalls_n = 0;
bzero((caddr_t)bw_meter_timers, sizeof(bw_meter_timers));
callout_init(&bw_upcalls_ch, CALLOUT_MPSAFE);
callout_reset(&bw_upcalls_ch, BW_UPCALLS_PERIOD,
expire_bw_upcalls_send, NULL);
callout_init(&bw_meter_ch, CALLOUT_MPSAFE);
callout_reset(&bw_meter_ch, BW_METER_PERIOD, expire_bw_meter_process, NULL);
callout_init(&tbf_reprocess_ch, CALLOUT_MPSAFE);
mrt_api_config = 0;
ip_mrouter = so;
if (mrtdebug)
log(LOG_DEBUG, "ip_mrouter_init\n");
@ -679,7 +686,6 @@ X_ip_mrouter_done(void)
bzero((caddr_t)viftable, sizeof(viftable));
numvifs = 0;
pim_assert = 0;
VIF_UNLOCK();
VIF_LOCK_DESTROY();
/*
@ -709,7 +715,6 @@ X_ip_mrouter_done(void)
bzero((caddr_t)mfctable, sizeof(mfctable));
bw_upcalls_n = 0;
bzero(bw_meter_timers, sizeof(bw_meter_timers));
MFC_UNLOCK();
MFC_LOCK_DESTROY();
/*
@ -3353,7 +3358,8 @@ ip_mroute_modevent(module_t mod, int type, void *unused)
switch (type) {
case MOD_LOAD:
s = splnet();
/* XXX Protect against multiple loading */
ip_mrouter_reset();
/* XXX synchronize setup */
ip_mcast_src = X_ip_mcast_src;
ip_mforward = X_ip_mforward;
ip_mrouter_done = X_ip_mrouter_done;
@ -3364,14 +3370,21 @@ ip_mroute_modevent(module_t mod, int type, void *unused)
legal_vif_num = X_legal_vif_num;
mrt_ioctl = X_mrt_ioctl;
rsvp_input_p = X_rsvp_input;
splx(s);
break;
case MOD_UNLOAD:
/*
* Typically module unload happens after the user-level
* process has shutdown the kernel services (the check
* below insures someone can't just yank the module out
* from under a running process). But if the module is
* just loaded and then unloaded w/o starting up a user
* process we still need to cleanup.
*/
if (ip_mrouter)
return EINVAL;
s = splnet();
X_ip_mrouter_done();
ip_mcast_src = NULL;
ip_mforward = NULL;
ip_mrouter_done = NULL;
@ -3382,7 +3395,6 @@ ip_mroute_modevent(module_t mod, int type, void *unused)
legal_vif_num = NULL;
mrt_ioctl = NULL;
rsvp_input_p = NULL;
splx(s);
break;
}
return 0;