diff options
Diffstat (limited to 'emulators/qemu-devel/files/kmod_bsd.c')
| -rw-r--r-- | emulators/qemu-devel/files/kmod_bsd.c | 111 |
1 files changed, 89 insertions, 22 deletions
diff --git a/emulators/qemu-devel/files/kmod_bsd.c b/emulators/qemu-devel/files/kmod_bsd.c index 63e1cf5053d8..9e51b7cedf89 100644 --- a/emulators/qemu-devel/files/kmod_bsd.c +++ b/emulators/qemu-devel/files/kmod_bsd.c @@ -284,6 +284,10 @@ void CDECL kqemu_log(const char *fmt, ...) #define KQEMU_MAX_INSTANCES 4 struct kqemu_instance { +#if __FreeBSD_version > 500000 + TAILQ_ENTRY(kqemu_instance) kqemu_ent; + struct cdev *kqemu_dev; +#endif struct kqemu_state *state; }; @@ -292,7 +296,9 @@ static int max_locked_pages; #if __FreeBSD_version < 500000 static dev_t kqemu_dev; #else -static struct cdev *kqemu_dev; +static struct clonedevs *kqemuclones; +static TAILQ_HEAD(,kqemu_instance) kqemuhead = TAILQ_HEAD_INITIALIZER(kqemuhead); +static eventhandler_tag clonetag; #endif @@ -322,9 +328,67 @@ static struct cdevsw kqemu_cdevsw = { .d_close = kqemu_close, .d_ioctl = kqemu_ioctl, .d_name = "kqemu", +#ifdef D_NEEDGIANT + .d_flags = D_NEEDGIANT, +#endif #endif }; +#if __FreeBSD_version > 500000 +static void +kqemu_clone(void *arg, char *name, int namelen, struct cdev **dev) +{ + int unit, r; + if (*dev != NULL) + return; + + if (strcmp(name, "kqemu") == 0) + unit = -1; + else if (dev_stdclone(name, NULL, "kqemu", &unit) != 1) + return; /* Bad name */ + if (unit != -1 && unit > KQEMU_MAX_INSTANCES) + return; + + r = clone_create(&kqemuclones, &kqemu_cdevsw, &unit, dev, 0); + if (r) { + *dev = make_dev(&kqemu_cdevsw, unit2minor(unit), + UID_ROOT, GID_WHEEL, 0660, "kqemu%d", unit); + if (*dev != NULL) { + dev_ref(*dev); + (*dev)->si_flags |= SI_CHEAPCLONE; + } + } +} +#endif + +static void kqemu_destroy(struct kqemu_instance *ks) +{ + struct cdev *dev = ks->kqemu_dev; + + if (ks->state) { + kqemu_delete(ks->state); + ks->state = NULL; + } + + free(ks, M_KQEMU); + dev->si_drv1 = NULL; +#if __FreeBSD_version > 500000 + mtx_lock_spin(&cache_lock); + TAILQ_REMOVE(&kqemuhead, ks, kqemu_ent); +#endif + if (!--kqemu_ref_count) { + int i; + for (i = 1023; i >= 0; i--) + kqemu_vfree(pagecache[i]); + memset(pagecache, 0, 1024 * sizeof(void *)); + } +#if __FreeBSD_version > 500000 + mtx_unlock_spin(&cache_lock); + + destroy_dev(dev); +#endif +} + int #if __FreeBSD_version < 500000 kqemu_open(dev, flags, fmt, p) @@ -355,7 +419,9 @@ kqemu_open(dev, flags, fmt, td) dev->si_drv1 = ks; #if __FreeBSD_version > 500000 + ks->kqemu_dev = dev; mtx_lock_spin(&cache_lock); + TAILQ_INSERT_TAIL(&kqemuhead, ks, kqemu_ent); #endif kqemu_ref_count++; #if __FreeBSD_version > 500000 @@ -382,25 +448,8 @@ kqemu_close(dev, flags, fmt, td) #endif struct kqemu_instance *ks = (struct kqemu_instance *) dev->si_drv1; - if (ks->state) { - kqemu_delete(ks->state); - ks->state = NULL; - } - - free(ks, M_KQEMU); - dev->si_drv1 = NULL; -#if __FreeBSD_version > 500000 - mtx_lock_spin(&cache_lock); -#endif - if (!--kqemu_ref_count) { - int i; - for (i = 1023; i >= 0; i--) - kqemu_vfree(pagecache[i]); - memset(pagecache, 0, 1024 * sizeof(void *)); - } -#if __FreeBSD_version > 500000 - mtx_unlock_spin(&cache_lock); -#endif + kqemu_destroy(ks); + kqemu_log("closed by pid=%d\n", p->p_pid); return(0); } @@ -513,9 +562,14 @@ init_module(void) kqemu_log("error registering cdevsw, rc=%d\n", rc); return(ENOENT); } -#endif kqemu_dev = make_dev(&kqemu_cdevsw, 0, UID_ROOT, GID_WHEEL, 0660, "kqemu"); +#else + clone_setup(&kqemuclones); + clonetag = EVENTHANDLER_REGISTER(dev_clone, kqemu_clone, 0, 1000); + if (!clonetag) + return ENOMEM; +#endif kqemu_log("KQEMU installed, max_instances=%d max_locked_mem=%dkB.\n", KQEMU_MAX_INSTANCES, max_locked_pages * 4); @@ -529,12 +583,25 @@ cleanup_module(void) { #if __FreeBSD_version < 500000 int rc; +#else + struct kqemu_instance *ks; #endif - destroy_dev(kqemu_dev); #if __FreeBSD_version < 500000 + destroy_dev(kqemu_dev); if ((rc = cdevsw_remove(&kqemu_cdevsw))) kqemu_log("error unregistering, rc=%d\n", rc); +#else + EVENTHANDLER_DEREGISTER(dev_clone, clonetag); + mtx_lock_spin(&cache_lock); + while ((ks = TAILQ_FIRST(&kqemuhead)) != NULL) { + mtx_unlock_spin(&cache_lock); + kqemu_destroy(ks); + mtx_lock_spin(&cache_lock); + } + mtx_unlock_spin(&cache_lock); + mtx_destroy(&cache_lock); + clone_cleanup(&kqemuclones); #endif kqemu_vfree(pagecache); |