diff options
Diffstat (limited to 'sys/kern/kern_vimage.c')
-rw-r--r-- | sys/kern/kern_vimage.c | 212 |
1 files changed, 7 insertions, 205 deletions
diff --git a/sys/kern/kern_vimage.c b/sys/kern/kern_vimage.c index b5742df..fa2d1f4 100644 --- a/sys/kern/kern_vimage.c +++ b/sys/kern/kern_vimage.c @@ -52,12 +52,6 @@ __FBSDID("$FreeBSD$"); MALLOC_DEFINE(M_VNET, "vnet", "network stack control block"); -static TAILQ_HEAD(vnet_modlink_head, vnet_modlink) vnet_modlink_head; -static TAILQ_HEAD(vnet_modpending_head, vnet_modlink) vnet_modpending_head; -static void vnet_mod_complete_registration(struct vnet_modlink *); -static int vnet_mod_constructor(struct vnet_modlink *); -static int vnet_mod_destructor(struct vnet_modlink *); - struct rwlock vnet_rwlock; struct sx vnet_sxlock; @@ -130,185 +124,10 @@ vi_if_move(struct thread *td, struct ifnet *ifp, char *ifname, int jid) return (error); } - -/* - * Kernel interfaces and handlers. - */ - -void -vnet_mod_register(const struct vnet_modinfo *vmi) -{ - - vnet_mod_register_multi(vmi, NULL, NULL); -} - -void -vnet_mod_register_multi(const struct vnet_modinfo *vmi, void *iarg, - char *iname) -{ - struct vnet_modlink *vml, *vml_iter; - - /* Do not register the same {module, iarg} pair more than once. */ - TAILQ_FOREACH(vml_iter, &vnet_modlink_head, vml_mod_le) - if (vml_iter->vml_modinfo == vmi && vml_iter->vml_iarg == iarg) - break; - if (vml_iter != NULL) - panic("registering an already registered vnet module: %s", - vml_iter->vml_modinfo->vmi_name); - vml = malloc(sizeof(struct vnet_modlink), M_VNET, M_NOWAIT); - - /* - * XXX we support only statically assigned module IDs at the time. - * In principle modules should be able to get a dynamically - * assigned ID at registration time. - * - * If a module is registered in multiple instances, then each - * instance must have both iarg and iname set. - */ - if (vmi->vmi_id >= VNET_MOD_MAX) - panic("invalid vnet module ID: %d", vmi->vmi_id); - if (vmi->vmi_name == NULL) - panic("vnet module with no name: %d", vmi->vmi_id); - if ((iarg == NULL) ^ (iname == NULL)) - panic("invalid vnet module instance: %s", vmi->vmi_name); - - vml->vml_modinfo = vmi; - vml->vml_iarg = iarg; - vml->vml_iname = iname; - - /* Check whether the module we depend on is already registered. */ - if (vmi->vmi_dependson != vmi->vmi_id) { - TAILQ_FOREACH(vml_iter, &vnet_modlink_head, vml_mod_le) - if (vml_iter->vml_modinfo->vmi_id == - vmi->vmi_dependson) - break; /* Depencency found, we are done. */ - if (vml_iter == NULL) { -#ifdef DEBUG_ORDERING - printf("dependency %d missing for vnet mod %s," - "postponing registration\n", - vmi->vmi_dependson, vmi->vmi_name); -#endif /* DEBUG_ORDERING */ - TAILQ_INSERT_TAIL(&vnet_modpending_head, vml, - vml_mod_le); - return; - } - } - - vnet_mod_complete_registration(vml); -} - -void -vnet_mod_complete_registration(struct vnet_modlink *vml) -{ - VNET_ITERATOR_DECL(vnet_iter); - struct vnet_modlink *vml_iter; - - TAILQ_INSERT_TAIL(&vnet_modlink_head, vml, vml_mod_le); - - VNET_FOREACH(vnet_iter) { - CURVNET_SET_QUIET(vnet_iter); - vnet_mod_constructor(vml); - CURVNET_RESTORE(); - } - - /* Check for pending modules depending on us. */ - do { - TAILQ_FOREACH(vml_iter, &vnet_modpending_head, vml_mod_le) - if (vml_iter->vml_modinfo->vmi_dependson == - vml->vml_modinfo->vmi_id) - break; - if (vml_iter != NULL) { -#ifdef DEBUG_ORDERING - printf("vnet mod %s now registering," - "dependency %d loaded\n", - vml_iter->vml_modinfo->vmi_name, - vml->vml_modinfo->vmi_id); -#endif /* DEBUG_ORDERING */ - TAILQ_REMOVE(&vnet_modpending_head, vml_iter, - vml_mod_le); - vnet_mod_complete_registration(vml_iter); - } - } while (vml_iter != NULL); -} - -void -vnet_mod_deregister(const struct vnet_modinfo *vmi) -{ - - vnet_mod_deregister_multi(vmi, NULL, NULL); -} - -void -vnet_mod_deregister_multi(const struct vnet_modinfo *vmi, void *iarg, - char *iname) -{ - VNET_ITERATOR_DECL(vnet_iter); - struct vnet_modlink *vml; - - TAILQ_FOREACH(vml, &vnet_modlink_head, vml_mod_le) - if (vml->vml_modinfo == vmi && vml->vml_iarg == iarg) - break; - if (vml == NULL) - panic("cannot deregister unregistered vnet module %s", - vmi->vmi_name); - - VNET_FOREACH(vnet_iter) { - CURVNET_SET_QUIET(vnet_iter); - vnet_mod_destructor(vml); - CURVNET_RESTORE(); - } - - TAILQ_REMOVE(&vnet_modlink_head, vml, vml_mod_le); - free(vml, M_VNET); -} - -static int -vnet_mod_constructor(struct vnet_modlink *vml) -{ - const struct vnet_modinfo *vmi = vml->vml_modinfo; - -#ifdef DEBUG_ORDERING - printf("instantiating vnet_%s", vmi->vmi_name); - if (vml->vml_iarg) - printf("/%s", vml->vml_iname); - printf(": "); - if (vmi->vmi_iattach != NULL) - printf("iattach()"); - printf("\n"); -#endif - - if (vmi->vmi_iattach != NULL) - vmi->vmi_iattach(vml->vml_iarg); - - return (0); -} - -static int -vnet_mod_destructor(struct vnet_modlink *vml) -{ - const struct vnet_modinfo *vmi = vml->vml_modinfo; - -#ifdef DEBUG_ORDERING - printf("destroying vnet_%s", vmi->vmi_name); - if (vml->vml_iarg) - printf("/%s", vml->vml_iname); - printf(": "); - if (vmi->vmi_idetach != NULL) - printf("idetach(); "); - printf("\n"); -#endif - - if (vmi->vmi_idetach) - vmi->vmi_idetach(vml->vml_iarg); - - return (0); -} - struct vnet * vnet_alloc(void) { struct vnet *vnet; - struct vnet_modlink *vml; vnet = malloc(sizeof(struct vnet), M_VNET, M_WAITOK | M_ZERO); vnet->vnet_magic_n = VNET_MAGIC_N; @@ -316,11 +135,12 @@ vnet_alloc(void) /* Initialize / attach vnet module instances. */ CURVNET_SET_QUIET(vnet); - TAILQ_FOREACH(vml, &vnet_modlink_head, vml_mod_le) - vnet_mod_constructor(vml); + + sx_xlock(&vnet_sxlock); + vnet_sysinit(); CURVNET_RESTORE(); - VNET_LIST_WLOCK(); + rw_wlock(&vnet_rwlock); LIST_INSERT_HEAD(&vnet_head, vnet, vnet_le); VNET_LIST_WUNLOCK(); @@ -331,14 +151,13 @@ void vnet_destroy(struct vnet *vnet) { struct ifnet *ifp, *nifp; - struct vnet_modlink *vml; KASSERT(vnet->vnet_sockcnt == 0, ("%s: vnet still has sockets", __func__)); VNET_LIST_WLOCK(); LIST_REMOVE(vnet, vnet_le); - VNET_LIST_WUNLOCK(); + rw_wunlock(&vnet_rwlock); CURVNET_SET_QUIET(vnet); @@ -348,10 +167,8 @@ vnet_destroy(struct vnet *vnet) if_vmove(ifp, ifp->if_home_vnet); } - /* Detach / free per-module state instances. */ - TAILQ_FOREACH_REVERSE(vml, &vnet_modlink_head, - vnet_modlink_head, vml_mod_le) - vnet_mod_destructor(vml); + vnet_sysuninit(); + sx_xunlock(&vnet_sxlock); CURVNET_RESTORE(); @@ -387,9 +204,6 @@ static void vnet0_init(void *arg) { - TAILQ_INIT(&vnet_modlink_head); - TAILQ_INIT(&vnet_modpending_head); - /* * We MUST clear curvnet in vi_init_done() before going SMP, * otherwise CURVNET_SET() macros would scream about unnecessary @@ -402,20 +216,8 @@ SYSINIT(vnet0_init, SI_SUB_VNET, SI_ORDER_FIRST, vnet0_init, NULL); static void vnet_init_done(void *unused) { - struct vnet_modlink *vml_iter; curvnet = NULL; - - if (TAILQ_EMPTY(&vnet_modpending_head)) - return; - - printf("vnet modules with unresolved dependencies:\n"); - TAILQ_FOREACH(vml_iter, &vnet_modpending_head, vml_mod_le) - printf(" %d:%s depending on %d\n", - vml_iter->vml_modinfo->vmi_id, - vml_iter->vml_modinfo->vmi_name, - vml_iter->vml_modinfo->vmi_dependson); - panic("going nowhere without my vnet modules!"); } SYSINIT(vnet_init_done, SI_SUB_VNET_DONE, SI_ORDER_FIRST, vnet_init_done, |