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Code Issues Releases Activity

Fix some minor issues in the internal vlan lists:

Browse Source 
- ifv_list member of struct ifvlan is unneeded in array mode,
  it's used only in hash mode to resolve hash collisions.

- We don't need the list of trunks at all.  (The initial reason for
  having it was to be able to destroy all trunks in the MOD_UNLOAD
  handler, but a trunk is not to be destroyed forcibly -- it will
  go away when all vlan interfaces on it have been deleted.
  Note that if_clone_detach() called first of all under MOD_UNLOAD
  will delete all vlan interfaces and thus make all trunks go away
  quietly.)

- It's enough to use a single [S]LIST_FIRST() in a typical list
  destruction loop.
This commit is contained in:
Yaroslav Tykhiy 2007-03-12 12:27:30 +00:00
parent 771709eb78
commit c0cb022b15
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=167483
1 changed files with 6 additions and 20 deletions
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26
sys/net/if_vlan.c
View File

@ -92,9 +92,7 @@ struct ifvlantrunk {
uint16_t hwidth;
#endif
int refcnt;
LIST_ENTRY(ifvlantrunk) trunk_entry;
};
static LIST_HEAD(, ifvlantrunk) trunk_list;
struct vlan_mc_entry {
struct ether_addr mc_addr;
@ -115,7 +113,9 @@ struct ifvlan {
uint16_t ifvm_tag; /* tag to apply on packets leaving if */
} ifv_mib;
SLIST_HEAD(, vlan_mc_entry) vlan_mc_listhead;
#ifndef VLAN_ARRAY
LIST_ENTRY(ifvlan) ifv_list;
#endif
};
#define ifv_proto ifv_mib.ifvm_proto
#define ifv_tag ifv_mib.ifvm_tag
@ -341,8 +341,7 @@ vlan_growhash(struct ifvlantrunk *trunk, int howmuch)
for (j = 0; j < n2; j++)
LIST_INIT(&hash2[j]);
for (i = 0; i < n; i++)
while (!LIST_EMPTY(&trunk->hash[i])) {
ifv = LIST_FIRST(&trunk->hash[i]);
while ((ifv = LIST_FIRST(&trunk->hash[i])) != NULL) {
LIST_REMOVE(ifv, ifv_list);
j = HASH(ifv->ifv_tag, n2 - 1);
LIST_INSERT_HEAD(&hash2[j], ifv, ifv_list);
@ -394,7 +393,6 @@ trunk_destroy(struct ifvlantrunk *trunk)
vlan_freehash(trunk);
#endif
trunk->parent->if_vlantrunk = NULL;
LIST_REMOVE(trunk, trunk_entry);
TRUNK_UNLOCK(trunk);
TRUNK_LOCK_DESTROY(trunk);
free(trunk, M_VLAN);
@ -417,7 +415,7 @@ vlan_setmulti(struct ifnet *ifp)
struct ifnet *ifp_p;
struct ifmultiaddr *ifma, *rifma = NULL;
struct ifvlan *sc;
struct vlan_mc_entry *mc = NULL;
struct vlan_mc_entry *mc;
struct sockaddr_dl sdl;
int error;
@ -435,8 +433,7 @@ vlan_setmulti(struct ifnet *ifp)
sdl.sdl_alen = ETHER_ADDR_LEN;
/* First, remove any existing filter entries. */
while (SLIST_FIRST(&sc->vlan_mc_listhead) != NULL) {
mc = SLIST_FIRST(&sc->vlan_mc_listhead);
while ((mc = SLIST_FIRST(&sc->vlan_mc_listhead)) != NULL) {
bcopy((char *)&mc->mc_addr, LLADDR(&sdl), ETHER_ADDR_LEN);
error = if_delmulti(ifp_p, (struct sockaddr *)&sdl);
if (error)
@ -535,7 +532,6 @@ vlan_modevent(module_t mod, int type, void *data)
vlan_ifdetach, NULL, EVENTHANDLER_PRI_ANY);
if (ifdetach_tag == NULL)
return (ENOMEM);
LIST_INIT(&trunk_list);
VLAN_LOCK_INIT();
vlan_input_p = vlan_input;
vlan_link_state_p = vlan_link_state;
@ -543,21 +539,13 @@ vlan_modevent(module_t mod, int type, void *data)
if_clone_attach(&vlan_cloner);
break;
case MOD_UNLOAD:
{
struct ifvlantrunk *trunk, *trunk1;
if_clone_detach(&vlan_cloner);
EVENTHANDLER_DEREGISTER(ifnet_departure_event, ifdetach_tag);
vlan_input_p = NULL;
vlan_link_state_p = NULL;
vlan_trunk_cap_p = NULL;
VLAN_LOCK();
LIST_FOREACH_SAFE(trunk, &trunk_list, trunk_entry, trunk1)
trunk_destroy(trunk);
VLAN_UNLOCK();
VLAN_LOCK_DESTROY();
break;
}
default:
return (EOPNOTSUPP);
}
@ -1011,7 +999,6 @@ vlan_config(struct ifvlan *ifv, struct ifnet *p, uint16_t tag)
goto exists;
}
TRUNK_LOCK_INIT(trunk);
LIST_INSERT_HEAD(&trunk_list, trunk, trunk_entry);
TRUNK_LOCK(trunk);
p->if_vlantrunk = trunk;
trunk->parent = p;
@ -1142,8 +1129,7 @@ vlan_unconfig_locked(struct ifnet *ifp)
sdl.sdl_type = IFT_ETHER;
sdl.sdl_alen = ETHER_ADDR_LEN;
while(SLIST_FIRST(&ifv->vlan_mc_listhead) != NULL) {
mc = SLIST_FIRST(&ifv->vlan_mc_listhead);
while ((mc = SLIST_FIRST(&ifv->vlan_mc_listhead)) != NULL) {
bcopy((char *)&mc->mc_addr, LLADDR(&sdl),
ETHER_ADDR_LEN);
error = if_delmulti(p, (struct sockaddr *)&sdl);