diff options
Diffstat (limited to 'sys/netinet/libalias/alias_local.h')
| -rw-r--r-- | sys/netinet/libalias/alias_local.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/sys/netinet/libalias/alias_local.h b/sys/netinet/libalias/alias_local.h index 1dc50c8..2abcb69 100644 --- a/sys/netinet/libalias/alias_local.h +++ b/sys/netinet/libalias/alias_local.h @@ -51,7 +51,10 @@ #ifdef _KERNEL #include <sys/malloc.h> +#include <sys/param.h> #include <sys/lock.h> +#include <sys/mutex.h> + /* XXX: LibAliasSetTarget() uses this constant. */ #define INADDR_NONE 0xffffffff #endif @@ -146,11 +149,31 @@ struct libalias { struct in_addr true_addr; /* in network byte order. */ u_short true_port; /* in host byte order. */ - +#ifdef _KERNEL + /* + * avoid races in libalias: every public function has to use it. + */ + struct mtx mutex; +#endif }; /* Macros */ +#ifdef _KERNEL +#define LIBALIAS_LOCK_INIT(l) \ + mtx_init(&l->mutex, "per-instance libalias mutex", NULL, MTX_DEF) +#define LIBALIAS_LOCK_ASSERT(l) mtx_assert(&l->mutex, MA_OWNED) +#define LIBALIAS_LOCK(l) mtx_lock(&l->mutex) +#define LIBALIAS_UNLOCK(l) mtx_unlock(&l->mutex) +#define LIBALIAS_LOCK_DESTROY(l) mtx_destroy(&l->mutex) +#else +#define LIBALIAS_LOCK_INIT(l) +#define LIBALIAS_LOCK_ASSERT(l) +#define LIBALIAS_LOCK(l) +#define LIBALIAS_UNLOCK(l) +#define LIBALIAS_LOCK_DESTROY(l) +#endif + /* * The following macro is used to update an * internet checksum. "delta" is a 32-bit |
