diff options
Diffstat (limited to 'sys/net')
| -rw-r--r-- | sys/net/if.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/sys/net/if.c b/sys/net/if.c index 52b3d78142f..d49be448477 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -1,4 +1,4 @@ -/* $OpenBSD: if.c,v 1.619 2020/08/19 11:23:59 kn Exp $ */ +/* $OpenBSD: if.c,v 1.620 2020/10/03 00:23:55 mvs Exp $ */ /* $NetBSD: if.c,v 1.35 1996/05/07 05:26:04 thorpej Exp $ */ /* @@ -87,6 +87,7 @@ #include <sys/percpu.h> #include <sys/proc.h> #include <sys/stdint.h> /* uintptr_t */ +#include <sys/rwlock.h> #include <net/if.h> #include <net/if_dl.h> @@ -227,6 +228,8 @@ TAILQ_HEAD(, ifg_group) ifg_head = TAILQ_HEAD_INITIALIZER(ifg_head); LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); int if_cloners_count; +struct rwlock if_cloners_lock = RWLOCK_INITIALIZER("clonerlock"); + /* hooks should only be added, deleted, and run from a process context */ struct mutex if_hooks_mtx = MUTEX_INITIALIZER(IPL_NONE); void if_hooks_run(struct task_list *); @@ -1139,19 +1142,25 @@ if_clone_create(const char *name, int rdomain) if (ifc == NULL) return (EINVAL); - if (ifunit(name) != NULL) - return (EEXIST); + rw_enter_write(&if_cloners_lock); + + if (ifunit(name) != NULL) { + ret = EEXIST; + goto unlock; + } ret = (*ifc->ifc_create)(ifc, unit); if (ret != 0 || (ifp = ifunit(name)) == NULL) - return (ret); + goto unlock; NET_LOCK(); if_addgroup(ifp, ifc->ifc_name); if (rdomain != 0) if_setrdomain(ifp, rdomain); NET_UNLOCK(); +unlock: + rw_exit_write(&if_cloners_lock); return (ret); } @@ -1173,9 +1182,13 @@ if_clone_destroy(const char *name) if (ifc->ifc_destroy == NULL) return (EOPNOTSUPP); + rw_enter_write(&if_cloners_lock); + ifp = ifunit(name); - if (ifp == NULL) + if (ifp == NULL) { + rw_exit_write(&if_cloners_lock); return (ENXIO); + } NET_LOCK(); if (ifp->if_flags & IFF_UP) { @@ -1187,6 +1200,8 @@ if_clone_destroy(const char *name) NET_UNLOCK(); ret = (*ifc->ifc_destroy)(ifp); + rw_exit_write(&if_cloners_lock); + return (ret); } |