19454b2d8SWarner Losh /*- 2efaa6588SAlfred Perlstein * Copyright (c) 2002 Alfred Perlstein <alfred@FreeBSD.org> 352648411SRobert Watson * Copyright (c) 2003-2005 SPARTA, Inc. 4590f242cSRobert Watson * Copyright (c) 2005 Robert N. M. Watson 5efaa6588SAlfred Perlstein * All rights reserved. 6efaa6588SAlfred Perlstein * 752648411SRobert Watson * This software was developed for the FreeBSD Project in part by Network 852648411SRobert Watson * Associates Laboratories, the Security Research Division of Network 952648411SRobert Watson * Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), 1052648411SRobert Watson * as part of the DARPA CHATS research program. 1152648411SRobert Watson * 12efaa6588SAlfred Perlstein * Redistribution and use in source and binary forms, with or without 13efaa6588SAlfred Perlstein * modification, are permitted provided that the following conditions 14efaa6588SAlfred Perlstein * are met: 15efaa6588SAlfred Perlstein * 1. Redistributions of source code must retain the above copyright 16efaa6588SAlfred Perlstein * notice, this list of conditions and the following disclaimer. 17efaa6588SAlfred Perlstein * 2. Redistributions in binary form must reproduce the above copyright 18efaa6588SAlfred Perlstein * notice, this list of conditions and the following disclaimer in the 19efaa6588SAlfred Perlstein * documentation and/or other materials provided with the distribution. 20efaa6588SAlfred Perlstein * 21efaa6588SAlfred Perlstein * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 22efaa6588SAlfred Perlstein * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23efaa6588SAlfred Perlstein * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24efaa6588SAlfred Perlstein * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 25efaa6588SAlfred Perlstein * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26efaa6588SAlfred Perlstein * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27efaa6588SAlfred Perlstein * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28efaa6588SAlfred Perlstein * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29efaa6588SAlfred Perlstein * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30efaa6588SAlfred Perlstein * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31efaa6588SAlfred Perlstein * SUCH DAMAGE. 32efaa6588SAlfred Perlstein */ 33efaa6588SAlfred Perlstein 34677b542eSDavid E. O'Brien #include <sys/cdefs.h> 35677b542eSDavid E. O'Brien __FBSDID("$FreeBSD$"); 36677b542eSDavid E. O'Brien 370e5d5bc2SKonstantin Belousov #include "opt_compat.h" 38efaa6588SAlfred Perlstein #include "opt_posix.h" 39efaa6588SAlfred Perlstein 40efaa6588SAlfred Perlstein #include <sys/param.h> 414a144410SRobert Watson #include <sys/capsicum.h> 426bc1e9cdSJohn Baldwin #include <sys/condvar.h> 436bc1e9cdSJohn Baldwin #include <sys/fcntl.h> 446bc1e9cdSJohn Baldwin #include <sys/file.h> 456bc1e9cdSJohn Baldwin #include <sys/filedesc.h> 466bc1e9cdSJohn Baldwin #include <sys/fnv_hash.h> 47efaa6588SAlfred Perlstein #include <sys/kernel.h> 486aeb05d7STom Rhodes #include <sys/ksem.h> 496bc1e9cdSJohn Baldwin #include <sys/lock.h> 506bc1e9cdSJohn Baldwin #include <sys/malloc.h> 516bc1e9cdSJohn Baldwin #include <sys/module.h> 526bc1e9cdSJohn Baldwin #include <sys/mutex.h> 53acd3428bSRobert Watson #include <sys/priv.h> 54efaa6588SAlfred Perlstein #include <sys/proc.h> 556aeb05d7STom Rhodes #include <sys/posix4.h> 566aeb05d7STom Rhodes #include <sys/_semaphore.h> 576bc1e9cdSJohn Baldwin #include <sys/stat.h> 586bc1e9cdSJohn Baldwin #include <sys/syscall.h> 596bc1e9cdSJohn Baldwin #include <sys/syscallsubr.h> 606bc1e9cdSJohn Baldwin #include <sys/sysctl.h> 616bc1e9cdSJohn Baldwin #include <sys/sysent.h> 626bc1e9cdSJohn Baldwin #include <sys/sysproto.h> 636bc1e9cdSJohn Baldwin #include <sys/systm.h> 646bc1e9cdSJohn Baldwin #include <sys/sx.h> 659696feebSJohn Baldwin #include <sys/user.h> 666bc1e9cdSJohn Baldwin #include <sys/vnode.h> 67efaa6588SAlfred Perlstein 68aed55708SRobert Watson #include <security/mac/mac_framework.h> 69aed55708SRobert Watson 709a253c10SAlexander Leidinger FEATURE(p1003_1b_semaphores, "POSIX P1003.1B semaphores support"); 716bc1e9cdSJohn Baldwin /* 726bc1e9cdSJohn Baldwin * TODO 736bc1e9cdSJohn Baldwin * 746bc1e9cdSJohn Baldwin * - Resource limits? 756bc1e9cdSJohn Baldwin * - Replace global sem_lock with mtx_pool locks? 766bc1e9cdSJohn Baldwin * - Add a MAC check_create() hook for creating new named semaphores. 776bc1e9cdSJohn Baldwin */ 78efaa6588SAlfred Perlstein 79efaa6588SAlfred Perlstein #ifndef SEM_MAX 80efaa6588SAlfred Perlstein #define SEM_MAX 30 81efaa6588SAlfred Perlstein #endif 82efaa6588SAlfred Perlstein 83c814aa3fSAlfred Perlstein #ifdef SEM_DEBUG 84c814aa3fSAlfred Perlstein #define DP(x) printf x 85c814aa3fSAlfred Perlstein #else 86c814aa3fSAlfred Perlstein #define DP(x) 87c814aa3fSAlfred Perlstein #endif 88c814aa3fSAlfred Perlstein 896bc1e9cdSJohn Baldwin struct ksem_mapping { 906bc1e9cdSJohn Baldwin char *km_path; 916bc1e9cdSJohn Baldwin Fnv32_t km_fnv; 926bc1e9cdSJohn Baldwin struct ksem *km_ksem; 936bc1e9cdSJohn Baldwin LIST_ENTRY(ksem_mapping) km_link; 946bc1e9cdSJohn Baldwin }; 956bc1e9cdSJohn Baldwin 966bc1e9cdSJohn Baldwin static MALLOC_DEFINE(M_KSEM, "ksem", "semaphore file descriptor"); 976bc1e9cdSJohn Baldwin static LIST_HEAD(, ksem_mapping) *ksem_dictionary; 986bc1e9cdSJohn Baldwin static struct sx ksem_dict_lock; 996bc1e9cdSJohn Baldwin static struct mtx ksem_count_lock; 1006bc1e9cdSJohn Baldwin static struct mtx sem_lock; 1016bc1e9cdSJohn Baldwin static u_long ksem_hash; 1026bc1e9cdSJohn Baldwin static int ksem_dead; 1036bc1e9cdSJohn Baldwin 1046bc1e9cdSJohn Baldwin #define KSEM_HASH(fnv) (&ksem_dictionary[(fnv) & ksem_hash]) 1056bc1e9cdSJohn Baldwin 1066bc1e9cdSJohn Baldwin static int nsems = 0; 1076bc1e9cdSJohn Baldwin SYSCTL_DECL(_p1003_1b); 1086bc1e9cdSJohn Baldwin SYSCTL_INT(_p1003_1b, OID_AUTO, nsems, CTLFLAG_RD, &nsems, 0, 1096bc1e9cdSJohn Baldwin "Number of active kernel POSIX semaphores"); 1106bc1e9cdSJohn Baldwin 1116bc1e9cdSJohn Baldwin static int kern_sem_wait(struct thread *td, semid_t id, int tryflag, 1126bc1e9cdSJohn Baldwin struct timespec *abstime); 1136bc1e9cdSJohn Baldwin static int ksem_access(struct ksem *ks, struct ucred *ucred); 1146bc1e9cdSJohn Baldwin static struct ksem *ksem_alloc(struct ucred *ucred, mode_t mode, 1156bc1e9cdSJohn Baldwin unsigned int value); 1166bc1e9cdSJohn Baldwin static int ksem_create(struct thread *td, const char *path, 1176bc1e9cdSJohn Baldwin semid_t *semidp, mode_t mode, unsigned int value, 1180e5d5bc2SKonstantin Belousov int flags, int compat32); 1196bc1e9cdSJohn Baldwin static void ksem_drop(struct ksem *ks); 1207008be5bSPawel Jakub Dawidek static int ksem_get(struct thread *td, semid_t id, cap_rights_t *rightsp, 121a9d2f8d8SRobert Watson struct file **fpp); 1226bc1e9cdSJohn Baldwin static struct ksem *ksem_hold(struct ksem *ks); 1236bc1e9cdSJohn Baldwin static void ksem_insert(char *path, Fnv32_t fnv, struct ksem *ks); 1246bc1e9cdSJohn Baldwin static struct ksem *ksem_lookup(char *path, Fnv32_t fnv); 1256bc1e9cdSJohn Baldwin static void ksem_module_destroy(void); 1266bc1e9cdSJohn Baldwin static int ksem_module_init(void); 1276bc1e9cdSJohn Baldwin static int ksem_remove(char *path, Fnv32_t fnv, struct ucred *ucred); 1286bc1e9cdSJohn Baldwin static int sem_modload(struct module *module, int cmd, void *arg); 1296bc1e9cdSJohn Baldwin 1306bc1e9cdSJohn Baldwin static fo_stat_t ksem_stat; 1316bc1e9cdSJohn Baldwin static fo_close_t ksem_closef; 1329c00bb91SKonstantin Belousov static fo_chmod_t ksem_chmod; 1339c00bb91SKonstantin Belousov static fo_chown_t ksem_chown; 1349696feebSJohn Baldwin static fo_fill_kinfo_t ksem_fill_kinfo; 1356bc1e9cdSJohn Baldwin 1366bc1e9cdSJohn Baldwin /* File descriptor operations. */ 1376bc1e9cdSJohn Baldwin static struct fileops ksem_ops = { 1382d69d0dcSJohn Baldwin .fo_read = invfo_rdwr, 1392d69d0dcSJohn Baldwin .fo_write = invfo_rdwr, 1402d69d0dcSJohn Baldwin .fo_truncate = invfo_truncate, 1412d69d0dcSJohn Baldwin .fo_ioctl = invfo_ioctl, 1422d69d0dcSJohn Baldwin .fo_poll = invfo_poll, 1432d69d0dcSJohn Baldwin .fo_kqfilter = invfo_kqfilter, 1446bc1e9cdSJohn Baldwin .fo_stat = ksem_stat, 1456bc1e9cdSJohn Baldwin .fo_close = ksem_closef, 1469c00bb91SKonstantin Belousov .fo_chmod = ksem_chmod, 1479c00bb91SKonstantin Belousov .fo_chown = ksem_chown, 148ca04d21dSGleb Smirnoff .fo_sendfile = invfo_sendfile, 1499696feebSJohn Baldwin .fo_fill_kinfo = ksem_fill_kinfo, 1506bc1e9cdSJohn Baldwin .fo_flags = DFLAG_PASSABLE 1516bc1e9cdSJohn Baldwin }; 1526bc1e9cdSJohn Baldwin 1536bc1e9cdSJohn Baldwin FEATURE(posix_sem, "POSIX semaphores"); 1546bc1e9cdSJohn Baldwin 1556bc1e9cdSJohn Baldwin static int 1566bc1e9cdSJohn Baldwin ksem_stat(struct file *fp, struct stat *sb, struct ucred *active_cred, 1576bc1e9cdSJohn Baldwin struct thread *td) 1586bc1e9cdSJohn Baldwin { 1596bc1e9cdSJohn Baldwin struct ksem *ks; 1606bc1e9cdSJohn Baldwin #ifdef MAC 1616bc1e9cdSJohn Baldwin int error; 1626bc1e9cdSJohn Baldwin #endif 1636bc1e9cdSJohn Baldwin 1646bc1e9cdSJohn Baldwin ks = fp->f_data; 1656bc1e9cdSJohn Baldwin 1666bc1e9cdSJohn Baldwin #ifdef MAC 1676bc1e9cdSJohn Baldwin error = mac_posixsem_check_stat(active_cred, fp->f_cred, ks); 1686bc1e9cdSJohn Baldwin if (error) 1696bc1e9cdSJohn Baldwin return (error); 1706bc1e9cdSJohn Baldwin #endif 1716bc1e9cdSJohn Baldwin 1726bc1e9cdSJohn Baldwin /* 1736bc1e9cdSJohn Baldwin * Attempt to return sanish values for fstat() on a semaphore 1746bc1e9cdSJohn Baldwin * file descriptor. 1756bc1e9cdSJohn Baldwin */ 1766bc1e9cdSJohn Baldwin bzero(sb, sizeof(*sb)); 1776bc1e9cdSJohn Baldwin 1789c00bb91SKonstantin Belousov mtx_lock(&sem_lock); 179510ea843SEd Schouten sb->st_atim = ks->ks_atime; 180510ea843SEd Schouten sb->st_ctim = ks->ks_ctime; 181510ea843SEd Schouten sb->st_mtim = ks->ks_mtime; 182510ea843SEd Schouten sb->st_birthtim = ks->ks_birthtime; 1836bc1e9cdSJohn Baldwin sb->st_uid = ks->ks_uid; 1846bc1e9cdSJohn Baldwin sb->st_gid = ks->ks_gid; 1859c00bb91SKonstantin Belousov sb->st_mode = S_IFREG | ks->ks_mode; /* XXX */ 1869c00bb91SKonstantin Belousov mtx_unlock(&sem_lock); 1876bc1e9cdSJohn Baldwin 1886bc1e9cdSJohn Baldwin return (0); 1896bc1e9cdSJohn Baldwin } 1906bc1e9cdSJohn Baldwin 1916bc1e9cdSJohn Baldwin static int 1929c00bb91SKonstantin Belousov ksem_chmod(struct file *fp, mode_t mode, struct ucred *active_cred, 1939c00bb91SKonstantin Belousov struct thread *td) 1949c00bb91SKonstantin Belousov { 1959c00bb91SKonstantin Belousov struct ksem *ks; 1969c00bb91SKonstantin Belousov int error; 1979c00bb91SKonstantin Belousov 1989c00bb91SKonstantin Belousov error = 0; 1999c00bb91SKonstantin Belousov ks = fp->f_data; 2009c00bb91SKonstantin Belousov mtx_lock(&sem_lock); 2019c00bb91SKonstantin Belousov #ifdef MAC 2029c00bb91SKonstantin Belousov error = mac_posixsem_check_setmode(active_cred, ks, mode); 2039c00bb91SKonstantin Belousov if (error != 0) 2049c00bb91SKonstantin Belousov goto out; 2059c00bb91SKonstantin Belousov #endif 2069c00bb91SKonstantin Belousov error = vaccess(VREG, ks->ks_mode, ks->ks_uid, ks->ks_gid, VADMIN, 2079c00bb91SKonstantin Belousov active_cred, NULL); 2089c00bb91SKonstantin Belousov if (error != 0) 2099c00bb91SKonstantin Belousov goto out; 2109c00bb91SKonstantin Belousov ks->ks_mode = mode & ACCESSPERMS; 2119c00bb91SKonstantin Belousov out: 2129c00bb91SKonstantin Belousov mtx_unlock(&sem_lock); 2139c00bb91SKonstantin Belousov return (error); 2149c00bb91SKonstantin Belousov } 2159c00bb91SKonstantin Belousov 2169c00bb91SKonstantin Belousov static int 2179c00bb91SKonstantin Belousov ksem_chown(struct file *fp, uid_t uid, gid_t gid, struct ucred *active_cred, 2189c00bb91SKonstantin Belousov struct thread *td) 2199c00bb91SKonstantin Belousov { 2209c00bb91SKonstantin Belousov struct ksem *ks; 2219c00bb91SKonstantin Belousov int error; 2229c00bb91SKonstantin Belousov 22368889ed6SKonstantin Belousov error = 0; 2249c00bb91SKonstantin Belousov ks = fp->f_data; 2259c00bb91SKonstantin Belousov mtx_lock(&sem_lock); 2269c00bb91SKonstantin Belousov #ifdef MAC 2279c00bb91SKonstantin Belousov error = mac_posixsem_check_setowner(active_cred, ks, uid, gid); 2289c00bb91SKonstantin Belousov if (error != 0) 2299c00bb91SKonstantin Belousov goto out; 2309c00bb91SKonstantin Belousov #endif 2319c00bb91SKonstantin Belousov if (uid == (uid_t)-1) 2329c00bb91SKonstantin Belousov uid = ks->ks_uid; 2339c00bb91SKonstantin Belousov if (gid == (gid_t)-1) 2349c00bb91SKonstantin Belousov gid = ks->ks_gid; 2359c00bb91SKonstantin Belousov if (((uid != ks->ks_uid && uid != active_cred->cr_uid) || 2369c00bb91SKonstantin Belousov (gid != ks->ks_gid && !groupmember(gid, active_cred))) && 2379c00bb91SKonstantin Belousov (error = priv_check_cred(active_cred, PRIV_VFS_CHOWN, 0))) 2389c00bb91SKonstantin Belousov goto out; 2399c00bb91SKonstantin Belousov ks->ks_uid = uid; 2409c00bb91SKonstantin Belousov ks->ks_gid = gid; 2419c00bb91SKonstantin Belousov out: 2429c00bb91SKonstantin Belousov mtx_unlock(&sem_lock); 2439c00bb91SKonstantin Belousov return (error); 2449c00bb91SKonstantin Belousov } 2459c00bb91SKonstantin Belousov 2469c00bb91SKonstantin Belousov static int 2476bc1e9cdSJohn Baldwin ksem_closef(struct file *fp, struct thread *td) 2486bc1e9cdSJohn Baldwin { 2496bc1e9cdSJohn Baldwin struct ksem *ks; 2506bc1e9cdSJohn Baldwin 2516bc1e9cdSJohn Baldwin ks = fp->f_data; 2526bc1e9cdSJohn Baldwin fp->f_data = NULL; 2536bc1e9cdSJohn Baldwin ksem_drop(ks); 2546bc1e9cdSJohn Baldwin 2556bc1e9cdSJohn Baldwin return (0); 2566bc1e9cdSJohn Baldwin } 2576bc1e9cdSJohn Baldwin 2589696feebSJohn Baldwin static int 2599696feebSJohn Baldwin ksem_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp) 2609696feebSJohn Baldwin { 2619696feebSJohn Baldwin struct ksem *ks; 2629696feebSJohn Baldwin 2639696feebSJohn Baldwin kif->kf_type = KF_TYPE_SEM; 2649696feebSJohn Baldwin ks = fp->f_data; 2659696feebSJohn Baldwin mtx_lock(&sem_lock); 2669696feebSJohn Baldwin kif->kf_un.kf_sem.kf_sem_value = ks->ks_value; 2679696feebSJohn Baldwin kif->kf_un.kf_sem.kf_sem_mode = S_IFREG | ks->ks_mode; /* XXX */ 2689696feebSJohn Baldwin mtx_unlock(&sem_lock); 2699696feebSJohn Baldwin if (ks->ks_path != NULL) { 2709696feebSJohn Baldwin sx_slock(&ksem_dict_lock); 2719696feebSJohn Baldwin if (ks->ks_path != NULL) 2729696feebSJohn Baldwin strlcpy(kif->kf_path, ks->ks_path, sizeof(kif->kf_path)); 2739696feebSJohn Baldwin sx_sunlock(&ksem_dict_lock); 2749696feebSJohn Baldwin } 2759696feebSJohn Baldwin return (0); 2769696feebSJohn Baldwin } 2779696feebSJohn Baldwin 2786bc1e9cdSJohn Baldwin /* 2796bc1e9cdSJohn Baldwin * ksem object management including creation and reference counting 2806bc1e9cdSJohn Baldwin * routines. 2816bc1e9cdSJohn Baldwin */ 2826bc1e9cdSJohn Baldwin static struct ksem * 2836bc1e9cdSJohn Baldwin ksem_alloc(struct ucred *ucred, mode_t mode, unsigned int value) 2846bc1e9cdSJohn Baldwin { 2856bc1e9cdSJohn Baldwin struct ksem *ks; 2866bc1e9cdSJohn Baldwin 2876bc1e9cdSJohn Baldwin mtx_lock(&ksem_count_lock); 2886bc1e9cdSJohn Baldwin if (nsems == p31b_getcfg(CTL_P1003_1B_SEM_NSEMS_MAX) || ksem_dead) { 2896bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 2906bc1e9cdSJohn Baldwin return (NULL); 2916bc1e9cdSJohn Baldwin } 2926bc1e9cdSJohn Baldwin nsems++; 2936bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 2946bc1e9cdSJohn Baldwin ks = malloc(sizeof(*ks), M_KSEM, M_WAITOK | M_ZERO); 2956bc1e9cdSJohn Baldwin ks->ks_uid = ucred->cr_uid; 2966bc1e9cdSJohn Baldwin ks->ks_gid = ucred->cr_gid; 2976bc1e9cdSJohn Baldwin ks->ks_mode = mode; 2986bc1e9cdSJohn Baldwin ks->ks_value = value; 2996bc1e9cdSJohn Baldwin cv_init(&ks->ks_cv, "ksem"); 3006bc1e9cdSJohn Baldwin vfs_timestamp(&ks->ks_birthtime); 3016bc1e9cdSJohn Baldwin ks->ks_atime = ks->ks_mtime = ks->ks_ctime = ks->ks_birthtime; 3026bc1e9cdSJohn Baldwin refcount_init(&ks->ks_ref, 1); 3036bc1e9cdSJohn Baldwin #ifdef MAC 3046bc1e9cdSJohn Baldwin mac_posixsem_init(ks); 3056bc1e9cdSJohn Baldwin mac_posixsem_create(ucred, ks); 3066bc1e9cdSJohn Baldwin #endif 3076bc1e9cdSJohn Baldwin 3086bc1e9cdSJohn Baldwin return (ks); 3096bc1e9cdSJohn Baldwin } 3106bc1e9cdSJohn Baldwin 3116bc1e9cdSJohn Baldwin static struct ksem * 3126bc1e9cdSJohn Baldwin ksem_hold(struct ksem *ks) 3136bc1e9cdSJohn Baldwin { 3146bc1e9cdSJohn Baldwin 3156bc1e9cdSJohn Baldwin refcount_acquire(&ks->ks_ref); 3166bc1e9cdSJohn Baldwin return (ks); 3176bc1e9cdSJohn Baldwin } 3186bc1e9cdSJohn Baldwin 3196bc1e9cdSJohn Baldwin static void 3206bc1e9cdSJohn Baldwin ksem_drop(struct ksem *ks) 3216bc1e9cdSJohn Baldwin { 3226bc1e9cdSJohn Baldwin 3236bc1e9cdSJohn Baldwin if (refcount_release(&ks->ks_ref)) { 3246bc1e9cdSJohn Baldwin #ifdef MAC 3256bc1e9cdSJohn Baldwin mac_posixsem_destroy(ks); 3266bc1e9cdSJohn Baldwin #endif 3276bc1e9cdSJohn Baldwin cv_destroy(&ks->ks_cv); 3286bc1e9cdSJohn Baldwin free(ks, M_KSEM); 3296bc1e9cdSJohn Baldwin mtx_lock(&ksem_count_lock); 3306bc1e9cdSJohn Baldwin nsems--; 3316bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 3326bc1e9cdSJohn Baldwin } 3336bc1e9cdSJohn Baldwin } 3346bc1e9cdSJohn Baldwin 3356bc1e9cdSJohn Baldwin /* 3366bc1e9cdSJohn Baldwin * Determine if the credentials have sufficient permissions for read 3376bc1e9cdSJohn Baldwin * and write access. 3386bc1e9cdSJohn Baldwin */ 3396bc1e9cdSJohn Baldwin static int 3406bc1e9cdSJohn Baldwin ksem_access(struct ksem *ks, struct ucred *ucred) 3416bc1e9cdSJohn Baldwin { 342efaa6588SAlfred Perlstein int error; 343efaa6588SAlfred Perlstein 3446bc1e9cdSJohn Baldwin error = vaccess(VREG, ks->ks_mode, ks->ks_uid, ks->ks_gid, 3456bc1e9cdSJohn Baldwin VREAD | VWRITE, ucred, NULL); 3466bc1e9cdSJohn Baldwin if (error) 3476bc1e9cdSJohn Baldwin error = priv_check_cred(ucred, PRIV_SEM_WRITE, 0); 348efaa6588SAlfred Perlstein return (error); 349efaa6588SAlfred Perlstein } 350efaa6588SAlfred Perlstein 3516bc1e9cdSJohn Baldwin /* 3526bc1e9cdSJohn Baldwin * Dictionary management. We maintain an in-kernel dictionary to map 3536bc1e9cdSJohn Baldwin * paths to semaphore objects. We use the FNV hash on the path to 3546bc1e9cdSJohn Baldwin * store the mappings in a hash table. 3556bc1e9cdSJohn Baldwin */ 3566bc1e9cdSJohn Baldwin static struct ksem * 3576bc1e9cdSJohn Baldwin ksem_lookup(char *path, Fnv32_t fnv) 3586bc1e9cdSJohn Baldwin { 3596bc1e9cdSJohn Baldwin struct ksem_mapping *map; 3606bc1e9cdSJohn Baldwin 3616bc1e9cdSJohn Baldwin LIST_FOREACH(map, KSEM_HASH(fnv), km_link) { 3626bc1e9cdSJohn Baldwin if (map->km_fnv != fnv) 3636bc1e9cdSJohn Baldwin continue; 3646bc1e9cdSJohn Baldwin if (strcmp(map->km_path, path) == 0) 3656bc1e9cdSJohn Baldwin return (map->km_ksem); 3666bc1e9cdSJohn Baldwin } 3676bc1e9cdSJohn Baldwin 3686bc1e9cdSJohn Baldwin return (NULL); 3696bc1e9cdSJohn Baldwin } 3706bc1e9cdSJohn Baldwin 3716bc1e9cdSJohn Baldwin static void 3726bc1e9cdSJohn Baldwin ksem_insert(char *path, Fnv32_t fnv, struct ksem *ks) 3736bc1e9cdSJohn Baldwin { 3746bc1e9cdSJohn Baldwin struct ksem_mapping *map; 3756bc1e9cdSJohn Baldwin 3766bc1e9cdSJohn Baldwin map = malloc(sizeof(struct ksem_mapping), M_KSEM, M_WAITOK); 3776bc1e9cdSJohn Baldwin map->km_path = path; 3786bc1e9cdSJohn Baldwin map->km_fnv = fnv; 3796bc1e9cdSJohn Baldwin map->km_ksem = ksem_hold(ks); 380958aa575SJohn Baldwin ks->ks_path = path; 3816bc1e9cdSJohn Baldwin LIST_INSERT_HEAD(KSEM_HASH(fnv), map, km_link); 3826bc1e9cdSJohn Baldwin } 3836bc1e9cdSJohn Baldwin 3846bc1e9cdSJohn Baldwin static int 3856bc1e9cdSJohn Baldwin ksem_remove(char *path, Fnv32_t fnv, struct ucred *ucred) 3866bc1e9cdSJohn Baldwin { 3876bc1e9cdSJohn Baldwin struct ksem_mapping *map; 3886bc1e9cdSJohn Baldwin int error; 3896bc1e9cdSJohn Baldwin 3906bc1e9cdSJohn Baldwin LIST_FOREACH(map, KSEM_HASH(fnv), km_link) { 3916bc1e9cdSJohn Baldwin if (map->km_fnv != fnv) 3926bc1e9cdSJohn Baldwin continue; 3936bc1e9cdSJohn Baldwin if (strcmp(map->km_path, path) == 0) { 3946bc1e9cdSJohn Baldwin #ifdef MAC 3956bc1e9cdSJohn Baldwin error = mac_posixsem_check_unlink(ucred, map->km_ksem); 3966bc1e9cdSJohn Baldwin if (error) 3976bc1e9cdSJohn Baldwin return (error); 3986bc1e9cdSJohn Baldwin #endif 3996bc1e9cdSJohn Baldwin error = ksem_access(map->km_ksem, ucred); 4006bc1e9cdSJohn Baldwin if (error) 4016bc1e9cdSJohn Baldwin return (error); 402958aa575SJohn Baldwin map->km_ksem->ks_path = NULL; 4036bc1e9cdSJohn Baldwin LIST_REMOVE(map, km_link); 4046bc1e9cdSJohn Baldwin ksem_drop(map->km_ksem); 4056bc1e9cdSJohn Baldwin free(map->km_path, M_KSEM); 4066bc1e9cdSJohn Baldwin free(map, M_KSEM); 4076bc1e9cdSJohn Baldwin return (0); 4086bc1e9cdSJohn Baldwin } 4096bc1e9cdSJohn Baldwin } 4106bc1e9cdSJohn Baldwin 4116bc1e9cdSJohn Baldwin return (ENOENT); 4126bc1e9cdSJohn Baldwin } 4136bc1e9cdSJohn Baldwin 4140e5d5bc2SKonstantin Belousov static int 4150e5d5bc2SKonstantin Belousov ksem_create_copyout_semid(struct thread *td, semid_t *semidp, int fd, 4160e5d5bc2SKonstantin Belousov int compat32) 4170e5d5bc2SKonstantin Belousov { 4180e5d5bc2SKonstantin Belousov semid_t semid; 4190e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 4200e5d5bc2SKonstantin Belousov int32_t semid32; 4210e5d5bc2SKonstantin Belousov #endif 4220e5d5bc2SKonstantin Belousov void *ptr; 4230e5d5bc2SKonstantin Belousov size_t ptrs; 4240e5d5bc2SKonstantin Belousov 4250e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 4260e5d5bc2SKonstantin Belousov if (compat32) { 4270e5d5bc2SKonstantin Belousov semid32 = fd; 4280e5d5bc2SKonstantin Belousov ptr = &semid32; 4290e5d5bc2SKonstantin Belousov ptrs = sizeof(semid32); 4300e5d5bc2SKonstantin Belousov } else { 4310e5d5bc2SKonstantin Belousov #endif 4320e5d5bc2SKonstantin Belousov semid = fd; 4330e5d5bc2SKonstantin Belousov ptr = &semid; 4340e5d5bc2SKonstantin Belousov ptrs = sizeof(semid); 4350e5d5bc2SKonstantin Belousov compat32 = 0; /* silence gcc */ 4360e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 4370e5d5bc2SKonstantin Belousov } 4380e5d5bc2SKonstantin Belousov #endif 4390e5d5bc2SKonstantin Belousov 4400e5d5bc2SKonstantin Belousov return (copyout(ptr, semidp, ptrs)); 4410e5d5bc2SKonstantin Belousov } 4420e5d5bc2SKonstantin Belousov 4436bc1e9cdSJohn Baldwin /* Other helper routines. */ 4446bc1e9cdSJohn Baldwin static int 4456bc1e9cdSJohn Baldwin ksem_create(struct thread *td, const char *name, semid_t *semidp, mode_t mode, 4460e5d5bc2SKonstantin Belousov unsigned int value, int flags, int compat32) 4476bc1e9cdSJohn Baldwin { 4486bc1e9cdSJohn Baldwin struct filedesc *fdp; 4496bc1e9cdSJohn Baldwin struct ksem *ks; 4506bc1e9cdSJohn Baldwin struct file *fp; 4516bc1e9cdSJohn Baldwin char *path; 4526bc1e9cdSJohn Baldwin Fnv32_t fnv; 4536bc1e9cdSJohn Baldwin int error, fd; 4546bc1e9cdSJohn Baldwin 4556bc1e9cdSJohn Baldwin if (value > SEM_VALUE_MAX) 4566bc1e9cdSJohn Baldwin return (EINVAL); 4576bc1e9cdSJohn Baldwin 4586bc1e9cdSJohn Baldwin fdp = td->td_proc->p_fd; 4596bc1e9cdSJohn Baldwin mode = (mode & ~fdp->fd_cmask) & ACCESSPERMS; 460b68cf25fSJilles Tjoelker error = falloc(td, &fp, &fd, O_CLOEXEC); 4616bc1e9cdSJohn Baldwin if (error) { 4626bc1e9cdSJohn Baldwin if (name == NULL) 4636bc1e9cdSJohn Baldwin error = ENOSPC; 4646bc1e9cdSJohn Baldwin return (error); 4656bc1e9cdSJohn Baldwin } 4666bc1e9cdSJohn Baldwin 4676bc1e9cdSJohn Baldwin /* 4686bc1e9cdSJohn Baldwin * Go ahead and copyout the file descriptor now. This is a bit 4696bc1e9cdSJohn Baldwin * premature, but it is a lot easier to handle errors as opposed 4706bc1e9cdSJohn Baldwin * to later when we've possibly created a new semaphore, etc. 4716bc1e9cdSJohn Baldwin */ 4720e5d5bc2SKonstantin Belousov error = ksem_create_copyout_semid(td, semidp, fd, compat32); 4736bc1e9cdSJohn Baldwin if (error) { 4746bc1e9cdSJohn Baldwin fdclose(fdp, fp, fd, td); 4756bc1e9cdSJohn Baldwin fdrop(fp, td); 4766bc1e9cdSJohn Baldwin return (error); 4776bc1e9cdSJohn Baldwin } 4786bc1e9cdSJohn Baldwin 4796bc1e9cdSJohn Baldwin if (name == NULL) { 4806bc1e9cdSJohn Baldwin /* Create an anonymous semaphore. */ 4816bc1e9cdSJohn Baldwin ks = ksem_alloc(td->td_ucred, mode, value); 4826bc1e9cdSJohn Baldwin if (ks == NULL) 4836bc1e9cdSJohn Baldwin error = ENOSPC; 4846bc1e9cdSJohn Baldwin else 4856bc1e9cdSJohn Baldwin ks->ks_flags |= KS_ANONYMOUS; 4866bc1e9cdSJohn Baldwin } else { 4876bc1e9cdSJohn Baldwin path = malloc(MAXPATHLEN, M_KSEM, M_WAITOK); 4886bc1e9cdSJohn Baldwin error = copyinstr(name, path, MAXPATHLEN, NULL); 4896bc1e9cdSJohn Baldwin 4906bc1e9cdSJohn Baldwin /* Require paths to start with a '/' character. */ 4916bc1e9cdSJohn Baldwin if (error == 0 && path[0] != '/') 4926bc1e9cdSJohn Baldwin error = EINVAL; 4936bc1e9cdSJohn Baldwin if (error) { 4946bc1e9cdSJohn Baldwin fdclose(fdp, fp, fd, td); 4956bc1e9cdSJohn Baldwin fdrop(fp, td); 4966bc1e9cdSJohn Baldwin free(path, M_KSEM); 4976bc1e9cdSJohn Baldwin return (error); 4986bc1e9cdSJohn Baldwin } 4996bc1e9cdSJohn Baldwin 5006bc1e9cdSJohn Baldwin fnv = fnv_32_str(path, FNV1_32_INIT); 5016bc1e9cdSJohn Baldwin sx_xlock(&ksem_dict_lock); 5026bc1e9cdSJohn Baldwin ks = ksem_lookup(path, fnv); 5036bc1e9cdSJohn Baldwin if (ks == NULL) { 5046bc1e9cdSJohn Baldwin /* Object does not exist, create it if requested. */ 5056bc1e9cdSJohn Baldwin if (flags & O_CREAT) { 5066bc1e9cdSJohn Baldwin ks = ksem_alloc(td->td_ucred, mode, value); 5076bc1e9cdSJohn Baldwin if (ks == NULL) 5086bc1e9cdSJohn Baldwin error = ENFILE; 5096bc1e9cdSJohn Baldwin else { 5106bc1e9cdSJohn Baldwin ksem_insert(path, fnv, ks); 5116bc1e9cdSJohn Baldwin path = NULL; 5126bc1e9cdSJohn Baldwin } 5136bc1e9cdSJohn Baldwin } else 5146bc1e9cdSJohn Baldwin error = ENOENT; 5156bc1e9cdSJohn Baldwin } else { 5166bc1e9cdSJohn Baldwin /* 5176bc1e9cdSJohn Baldwin * Object already exists, obtain a new 5186bc1e9cdSJohn Baldwin * reference if requested and permitted. 5196bc1e9cdSJohn Baldwin */ 5206bc1e9cdSJohn Baldwin if ((flags & (O_CREAT | O_EXCL)) == 5216bc1e9cdSJohn Baldwin (O_CREAT | O_EXCL)) 5226bc1e9cdSJohn Baldwin error = EEXIST; 5236bc1e9cdSJohn Baldwin else { 5246bc1e9cdSJohn Baldwin #ifdef MAC 5256bc1e9cdSJohn Baldwin error = mac_posixsem_check_open(td->td_ucred, 5266bc1e9cdSJohn Baldwin ks); 5276bc1e9cdSJohn Baldwin if (error == 0) 5286bc1e9cdSJohn Baldwin #endif 5296bc1e9cdSJohn Baldwin error = ksem_access(ks, td->td_ucred); 5306bc1e9cdSJohn Baldwin } 5316bc1e9cdSJohn Baldwin if (error == 0) 5326bc1e9cdSJohn Baldwin ksem_hold(ks); 5336bc1e9cdSJohn Baldwin #ifdef INVARIANTS 5346bc1e9cdSJohn Baldwin else 5356bc1e9cdSJohn Baldwin ks = NULL; 5366bc1e9cdSJohn Baldwin #endif 5376bc1e9cdSJohn Baldwin } 5386bc1e9cdSJohn Baldwin sx_xunlock(&ksem_dict_lock); 5396bc1e9cdSJohn Baldwin if (path) 5406bc1e9cdSJohn Baldwin free(path, M_KSEM); 5416bc1e9cdSJohn Baldwin } 5426bc1e9cdSJohn Baldwin 5436bc1e9cdSJohn Baldwin if (error) { 5446bc1e9cdSJohn Baldwin KASSERT(ks == NULL, ("ksem_create error with a ksem")); 5456bc1e9cdSJohn Baldwin fdclose(fdp, fp, fd, td); 5466bc1e9cdSJohn Baldwin fdrop(fp, td); 5476bc1e9cdSJohn Baldwin return (error); 5486bc1e9cdSJohn Baldwin } 5496bc1e9cdSJohn Baldwin KASSERT(ks != NULL, ("ksem_create w/o a ksem")); 5506bc1e9cdSJohn Baldwin 5516bc1e9cdSJohn Baldwin finit(fp, FREAD | FWRITE, DTYPE_SEM, ks, &ksem_ops); 5526bc1e9cdSJohn Baldwin 5536bc1e9cdSJohn Baldwin fdrop(fp, td); 5546bc1e9cdSJohn Baldwin 5556bc1e9cdSJohn Baldwin return (0); 5566bc1e9cdSJohn Baldwin } 5576bc1e9cdSJohn Baldwin 5586bc1e9cdSJohn Baldwin static int 5597008be5bSPawel Jakub Dawidek ksem_get(struct thread *td, semid_t id, cap_rights_t *rightsp, 5607008be5bSPawel Jakub Dawidek struct file **fpp) 5616bc1e9cdSJohn Baldwin { 5626bc1e9cdSJohn Baldwin struct ksem *ks; 5636bc1e9cdSJohn Baldwin struct file *fp; 5646bc1e9cdSJohn Baldwin int error; 5656bc1e9cdSJohn Baldwin 5667008be5bSPawel Jakub Dawidek error = fget(td, id, rightsp, &fp); 5676bc1e9cdSJohn Baldwin if (error) 5686bc1e9cdSJohn Baldwin return (EINVAL); 5696bc1e9cdSJohn Baldwin if (fp->f_type != DTYPE_SEM) { 5706bc1e9cdSJohn Baldwin fdrop(fp, td); 5716bc1e9cdSJohn Baldwin return (EINVAL); 5726bc1e9cdSJohn Baldwin } 5736bc1e9cdSJohn Baldwin ks = fp->f_data; 5746bc1e9cdSJohn Baldwin if (ks->ks_flags & KS_DEAD) { 5756bc1e9cdSJohn Baldwin fdrop(fp, td); 5766bc1e9cdSJohn Baldwin return (EINVAL); 5776bc1e9cdSJohn Baldwin } 5786bc1e9cdSJohn Baldwin *fpp = fp; 5796bc1e9cdSJohn Baldwin return (0); 5806bc1e9cdSJohn Baldwin } 5816bc1e9cdSJohn Baldwin 5826bc1e9cdSJohn Baldwin /* System calls. */ 583efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 584efaa6588SAlfred Perlstein struct ksem_init_args { 585efaa6588SAlfred Perlstein unsigned int value; 586efaa6588SAlfred Perlstein semid_t *idp; 587efaa6588SAlfred Perlstein }; 588efaa6588SAlfred Perlstein #endif 589efaa6588SAlfred Perlstein int 5908451d0ddSKip Macy sys_ksem_init(struct thread *td, struct ksem_init_args *uap) 591efaa6588SAlfred Perlstein { 592efaa6588SAlfred Perlstein 5936bc1e9cdSJohn Baldwin return (ksem_create(td, NULL, uap->idp, S_IRWXU | S_IRWXG, uap->value, 5940e5d5bc2SKonstantin Belousov 0, 0)); 595efaa6588SAlfred Perlstein } 596efaa6588SAlfred Perlstein 597efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 598efaa6588SAlfred Perlstein struct ksem_open_args { 599efaa6588SAlfred Perlstein char *name; 600efaa6588SAlfred Perlstein int oflag; 601efaa6588SAlfred Perlstein mode_t mode; 602efaa6588SAlfred Perlstein unsigned int value; 603efaa6588SAlfred Perlstein semid_t *idp; 604efaa6588SAlfred Perlstein }; 605efaa6588SAlfred Perlstein #endif 606efaa6588SAlfred Perlstein int 6078451d0ddSKip Macy sys_ksem_open(struct thread *td, struct ksem_open_args *uap) 608efaa6588SAlfred Perlstein { 609efaa6588SAlfred Perlstein 610b2966a5aSBruce M Simpson DP((">>> ksem_open start, pid=%d\n", (int)td->td_proc->p_pid)); 611b2966a5aSBruce M Simpson 6126bc1e9cdSJohn Baldwin if ((uap->oflag & ~(O_CREAT | O_EXCL)) != 0) 613b3890a1cSAlfred Perlstein return (EINVAL); 6146bc1e9cdSJohn Baldwin return (ksem_create(td, uap->name, uap->idp, uap->mode, uap->value, 6150e5d5bc2SKonstantin Belousov uap->oflag, 0)); 616efaa6588SAlfred Perlstein } 617efaa6588SAlfred Perlstein 618efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 619efaa6588SAlfred Perlstein struct ksem_unlink_args { 620efaa6588SAlfred Perlstein char *name; 621efaa6588SAlfred Perlstein }; 622efaa6588SAlfred Perlstein #endif 623efaa6588SAlfred Perlstein int 6248451d0ddSKip Macy sys_ksem_unlink(struct thread *td, struct ksem_unlink_args *uap) 625efaa6588SAlfred Perlstein { 6266bc1e9cdSJohn Baldwin char *path; 6276bc1e9cdSJohn Baldwin Fnv32_t fnv; 628efaa6588SAlfred Perlstein int error; 629efaa6588SAlfred Perlstein 6306bc1e9cdSJohn Baldwin path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 6316bc1e9cdSJohn Baldwin error = copyinstr(uap->name, path, MAXPATHLEN, NULL); 63252648411SRobert Watson if (error) { 6336bc1e9cdSJohn Baldwin free(path, M_TEMP); 63452648411SRobert Watson return (error); 63552648411SRobert Watson } 6366bc1e9cdSJohn Baldwin 6376bc1e9cdSJohn Baldwin fnv = fnv_32_str(path, FNV1_32_INIT); 6386bc1e9cdSJohn Baldwin sx_xlock(&ksem_dict_lock); 6396bc1e9cdSJohn Baldwin error = ksem_remove(path, fnv, td->td_ucred); 6406bc1e9cdSJohn Baldwin sx_xunlock(&ksem_dict_lock); 6416bc1e9cdSJohn Baldwin free(path, M_TEMP); 6426bc1e9cdSJohn Baldwin 643efaa6588SAlfred Perlstein return (error); 644efaa6588SAlfred Perlstein } 645efaa6588SAlfred Perlstein 646efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 647efaa6588SAlfred Perlstein struct ksem_close_args { 648efaa6588SAlfred Perlstein semid_t id; 649efaa6588SAlfred Perlstein }; 650efaa6588SAlfred Perlstein #endif 651efaa6588SAlfred Perlstein int 6528451d0ddSKip Macy sys_ksem_close(struct thread *td, struct ksem_close_args *uap) 653efaa6588SAlfred Perlstein { 654efaa6588SAlfred Perlstein struct ksem *ks; 6556bc1e9cdSJohn Baldwin struct file *fp; 656efaa6588SAlfred Perlstein int error; 657efaa6588SAlfred Perlstein 658a9d2f8d8SRobert Watson /* No capability rights required to close a semaphore. */ 659a9d2f8d8SRobert Watson error = ksem_get(td, uap->id, 0, &fp); 6606bc1e9cdSJohn Baldwin if (error) 6616bc1e9cdSJohn Baldwin return (error); 6626bc1e9cdSJohn Baldwin ks = fp->f_data; 6636bc1e9cdSJohn Baldwin if (ks->ks_flags & KS_ANONYMOUS) { 6646bc1e9cdSJohn Baldwin fdrop(fp, td); 6656bc1e9cdSJohn Baldwin return (EINVAL); 6666bc1e9cdSJohn Baldwin } 6676bc1e9cdSJohn Baldwin error = kern_close(td, uap->id); 6686bc1e9cdSJohn Baldwin fdrop(fp, td); 669b3890a1cSAlfred Perlstein return (error); 670efaa6588SAlfred Perlstein } 671efaa6588SAlfred Perlstein 672efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 673efaa6588SAlfred Perlstein struct ksem_post_args { 674efaa6588SAlfred Perlstein semid_t id; 675efaa6588SAlfred Perlstein }; 676efaa6588SAlfred Perlstein #endif 677efaa6588SAlfred Perlstein int 6788451d0ddSKip Macy sys_ksem_post(struct thread *td, struct ksem_post_args *uap) 679efaa6588SAlfred Perlstein { 6807008be5bSPawel Jakub Dawidek cap_rights_t rights; 6816bc1e9cdSJohn Baldwin struct file *fp; 682efaa6588SAlfred Perlstein struct ksem *ks; 683efaa6588SAlfred Perlstein int error; 684efaa6588SAlfred Perlstein 6857008be5bSPawel Jakub Dawidek error = ksem_get(td, uap->id, 6867008be5bSPawel Jakub Dawidek cap_rights_init(&rights, CAP_SEM_POST), &fp); 6876bc1e9cdSJohn Baldwin if (error) 6886bc1e9cdSJohn Baldwin return (error); 6896bc1e9cdSJohn Baldwin ks = fp->f_data; 6906bc1e9cdSJohn Baldwin 691efaa6588SAlfred Perlstein mtx_lock(&sem_lock); 69252648411SRobert Watson #ifdef MAC 6936bc1e9cdSJohn Baldwin error = mac_posixsem_check_post(td->td_ucred, fp->f_cred, ks); 69452648411SRobert Watson if (error) 69552648411SRobert Watson goto err; 69652648411SRobert Watson #endif 697efaa6588SAlfred Perlstein if (ks->ks_value == SEM_VALUE_MAX) { 698efaa6588SAlfred Perlstein error = EOVERFLOW; 699efaa6588SAlfred Perlstein goto err; 700efaa6588SAlfred Perlstein } 701efaa6588SAlfred Perlstein ++ks->ks_value; 702efaa6588SAlfred Perlstein if (ks->ks_waiters > 0) 703efaa6588SAlfred Perlstein cv_signal(&ks->ks_cv); 704efaa6588SAlfred Perlstein error = 0; 7056bc1e9cdSJohn Baldwin vfs_timestamp(&ks->ks_ctime); 706efaa6588SAlfred Perlstein err: 707efaa6588SAlfred Perlstein mtx_unlock(&sem_lock); 7086bc1e9cdSJohn Baldwin fdrop(fp, td); 709efaa6588SAlfred Perlstein return (error); 710efaa6588SAlfred Perlstein } 711efaa6588SAlfred Perlstein 712efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 713efaa6588SAlfred Perlstein struct ksem_wait_args { 714efaa6588SAlfred Perlstein semid_t id; 715efaa6588SAlfred Perlstein }; 716efaa6588SAlfred Perlstein #endif 717efaa6588SAlfred Perlstein int 7188451d0ddSKip Macy sys_ksem_wait(struct thread *td, struct ksem_wait_args *uap) 719efaa6588SAlfred Perlstein { 720efaa6588SAlfred Perlstein 721aae94fbbSDaniel Eischen return (kern_sem_wait(td, uap->id, 0, NULL)); 722aae94fbbSDaniel Eischen } 723aae94fbbSDaniel Eischen 724aae94fbbSDaniel Eischen #ifndef _SYS_SYSPROTO_H_ 725aae94fbbSDaniel Eischen struct ksem_timedwait_args { 726aae94fbbSDaniel Eischen semid_t id; 727d60e86c8SStefan Farfeleder const struct timespec *abstime; 728aae94fbbSDaniel Eischen }; 729aae94fbbSDaniel Eischen #endif 730aae94fbbSDaniel Eischen int 7318451d0ddSKip Macy sys_ksem_timedwait(struct thread *td, struct ksem_timedwait_args *uap) 732aae94fbbSDaniel Eischen { 733aae94fbbSDaniel Eischen struct timespec abstime; 734aae94fbbSDaniel Eischen struct timespec *ts; 735aae94fbbSDaniel Eischen int error; 736aae94fbbSDaniel Eischen 7378e230e30SRobert Watson /* 7388e230e30SRobert Watson * We allow a null timespec (wait forever). 7398e230e30SRobert Watson */ 740aae94fbbSDaniel Eischen if (uap->abstime == NULL) 741aae94fbbSDaniel Eischen ts = NULL; 742aae94fbbSDaniel Eischen else { 743aae94fbbSDaniel Eischen error = copyin(uap->abstime, &abstime, sizeof(abstime)); 744aae94fbbSDaniel Eischen if (error != 0) 745aae94fbbSDaniel Eischen return (error); 746aae94fbbSDaniel Eischen if (abstime.tv_nsec >= 1000000000 || abstime.tv_nsec < 0) 747aae94fbbSDaniel Eischen return (EINVAL); 748aae94fbbSDaniel Eischen ts = &abstime; 749aae94fbbSDaniel Eischen } 750aae94fbbSDaniel Eischen return (kern_sem_wait(td, uap->id, 0, ts)); 751efaa6588SAlfred Perlstein } 752efaa6588SAlfred Perlstein 753efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 754efaa6588SAlfred Perlstein struct ksem_trywait_args { 755efaa6588SAlfred Perlstein semid_t id; 756efaa6588SAlfred Perlstein }; 757efaa6588SAlfred Perlstein #endif 758efaa6588SAlfred Perlstein int 7598451d0ddSKip Macy sys_ksem_trywait(struct thread *td, struct ksem_trywait_args *uap) 760efaa6588SAlfred Perlstein { 761efaa6588SAlfred Perlstein 762aae94fbbSDaniel Eischen return (kern_sem_wait(td, uap->id, 1, NULL)); 763efaa6588SAlfred Perlstein } 764efaa6588SAlfred Perlstein 765c3053131SPoul-Henning Kamp static int 766c1250af6SRobert Watson kern_sem_wait(struct thread *td, semid_t id, int tryflag, 767c1250af6SRobert Watson struct timespec *abstime) 768efaa6588SAlfred Perlstein { 769aae94fbbSDaniel Eischen struct timespec ts1, ts2; 770aae94fbbSDaniel Eischen struct timeval tv; 7717008be5bSPawel Jakub Dawidek cap_rights_t rights; 7726bc1e9cdSJohn Baldwin struct file *fp; 773efaa6588SAlfred Perlstein struct ksem *ks; 774efaa6588SAlfred Perlstein int error; 775efaa6588SAlfred Perlstein 776b2966a5aSBruce M Simpson DP((">>> kern_sem_wait entered! pid=%d\n", (int)td->td_proc->p_pid)); 7777008be5bSPawel Jakub Dawidek error = ksem_get(td, id, cap_rights_init(&rights, CAP_SEM_WAIT), &fp); 7786bc1e9cdSJohn Baldwin if (error) 7796bc1e9cdSJohn Baldwin return (error); 7806bc1e9cdSJohn Baldwin ks = fp->f_data; 781efaa6588SAlfred Perlstein mtx_lock(&sem_lock); 782b2966a5aSBruce M Simpson DP((">>> kern_sem_wait critical section entered! pid=%d\n", 783b2966a5aSBruce M Simpson (int)td->td_proc->p_pid)); 78452648411SRobert Watson #ifdef MAC 7856bc1e9cdSJohn Baldwin error = mac_posixsem_check_wait(td->td_ucred, fp->f_cred, ks); 78652648411SRobert Watson if (error) { 78752648411SRobert Watson DP(("kern_sem_wait mac failed\n")); 78852648411SRobert Watson goto err; 78952648411SRobert Watson } 79052648411SRobert Watson #endif 791c814aa3fSAlfred Perlstein DP(("kern_sem_wait value = %d, tryflag %d\n", ks->ks_value, tryflag)); 7926bc1e9cdSJohn Baldwin vfs_timestamp(&ks->ks_atime); 79377d8bf9cSBruce M Simpson while (ks->ks_value == 0) { 794efaa6588SAlfred Perlstein ks->ks_waiters++; 795aae94fbbSDaniel Eischen if (tryflag != 0) 796aae94fbbSDaniel Eischen error = EAGAIN; 797aae94fbbSDaniel Eischen else if (abstime == NULL) 798aae94fbbSDaniel Eischen error = cv_wait_sig(&ks->ks_cv, &sem_lock); 799aae94fbbSDaniel Eischen else { 800aae94fbbSDaniel Eischen for (;;) { 801aae94fbbSDaniel Eischen ts1 = *abstime; 802aae94fbbSDaniel Eischen getnanotime(&ts2); 803aae94fbbSDaniel Eischen timespecsub(&ts1, &ts2); 804aae94fbbSDaniel Eischen TIMESPEC_TO_TIMEVAL(&tv, &ts1); 805aae94fbbSDaniel Eischen if (tv.tv_sec < 0) { 806aae94fbbSDaniel Eischen error = ETIMEDOUT; 807aae94fbbSDaniel Eischen break; 808aae94fbbSDaniel Eischen } 809aae94fbbSDaniel Eischen error = cv_timedwait_sig(&ks->ks_cv, 810aae94fbbSDaniel Eischen &sem_lock, tvtohz(&tv)); 811aae94fbbSDaniel Eischen if (error != EWOULDBLOCK) 812aae94fbbSDaniel Eischen break; 813aae94fbbSDaniel Eischen } 814aae94fbbSDaniel Eischen } 815efaa6588SAlfred Perlstein ks->ks_waiters--; 816efaa6588SAlfred Perlstein if (error) 817efaa6588SAlfred Perlstein goto err; 818efaa6588SAlfred Perlstein } 819efaa6588SAlfred Perlstein ks->ks_value--; 820b2966a5aSBruce M Simpson DP(("kern_sem_wait value post-decrement = %d\n", ks->ks_value)); 821efaa6588SAlfred Perlstein error = 0; 822efaa6588SAlfred Perlstein err: 823efaa6588SAlfred Perlstein mtx_unlock(&sem_lock); 8246bc1e9cdSJohn Baldwin fdrop(fp, td); 825b2966a5aSBruce M Simpson DP(("<<< kern_sem_wait leaving, pid=%d, error = %d\n", 826b2966a5aSBruce M Simpson (int)td->td_proc->p_pid, error)); 827efaa6588SAlfred Perlstein return (error); 828efaa6588SAlfred Perlstein } 829efaa6588SAlfred Perlstein 830efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 831efaa6588SAlfred Perlstein struct ksem_getvalue_args { 832efaa6588SAlfred Perlstein semid_t id; 833efaa6588SAlfred Perlstein int *val; 834efaa6588SAlfred Perlstein }; 835efaa6588SAlfred Perlstein #endif 836efaa6588SAlfred Perlstein int 8378451d0ddSKip Macy sys_ksem_getvalue(struct thread *td, struct ksem_getvalue_args *uap) 838efaa6588SAlfred Perlstein { 8397008be5bSPawel Jakub Dawidek cap_rights_t rights; 8406bc1e9cdSJohn Baldwin struct file *fp; 841efaa6588SAlfred Perlstein struct ksem *ks; 842efaa6588SAlfred Perlstein int error, val; 843efaa6588SAlfred Perlstein 8447008be5bSPawel Jakub Dawidek error = ksem_get(td, uap->id, 8457008be5bSPawel Jakub Dawidek cap_rights_init(&rights, CAP_SEM_GETVALUE), &fp); 8466bc1e9cdSJohn Baldwin if (error) 8476bc1e9cdSJohn Baldwin return (error); 8486bc1e9cdSJohn Baldwin ks = fp->f_data; 8496bc1e9cdSJohn Baldwin 850efaa6588SAlfred Perlstein mtx_lock(&sem_lock); 85152648411SRobert Watson #ifdef MAC 8526bc1e9cdSJohn Baldwin error = mac_posixsem_check_getvalue(td->td_ucred, fp->f_cred, ks); 85352648411SRobert Watson if (error) { 85452648411SRobert Watson mtx_unlock(&sem_lock); 8556bc1e9cdSJohn Baldwin fdrop(fp, td); 85652648411SRobert Watson return (error); 85752648411SRobert Watson } 85852648411SRobert Watson #endif 859efaa6588SAlfred Perlstein val = ks->ks_value; 8606bc1e9cdSJohn Baldwin vfs_timestamp(&ks->ks_atime); 861efaa6588SAlfred Perlstein mtx_unlock(&sem_lock); 8626bc1e9cdSJohn Baldwin fdrop(fp, td); 863efaa6588SAlfred Perlstein error = copyout(&val, uap->val, sizeof(val)); 864efaa6588SAlfred Perlstein return (error); 865efaa6588SAlfred Perlstein } 866efaa6588SAlfred Perlstein 867efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 868efaa6588SAlfred Perlstein struct ksem_destroy_args { 869efaa6588SAlfred Perlstein semid_t id; 870efaa6588SAlfred Perlstein }; 871efaa6588SAlfred Perlstein #endif 872efaa6588SAlfred Perlstein int 8738451d0ddSKip Macy sys_ksem_destroy(struct thread *td, struct ksem_destroy_args *uap) 874efaa6588SAlfred Perlstein { 8756bc1e9cdSJohn Baldwin struct file *fp; 876efaa6588SAlfred Perlstein struct ksem *ks; 877efaa6588SAlfred Perlstein int error; 878efaa6588SAlfred Perlstein 879a9d2f8d8SRobert Watson /* No capability rights required to close a semaphore. */ 880a9d2f8d8SRobert Watson error = ksem_get(td, uap->id, 0, &fp); 8816bc1e9cdSJohn Baldwin if (error) 8826bc1e9cdSJohn Baldwin return (error); 8836bc1e9cdSJohn Baldwin ks = fp->f_data; 8846bc1e9cdSJohn Baldwin if (!(ks->ks_flags & KS_ANONYMOUS)) { 8856bc1e9cdSJohn Baldwin fdrop(fp, td); 8866bc1e9cdSJohn Baldwin return (EINVAL); 887efaa6588SAlfred Perlstein } 8886bc1e9cdSJohn Baldwin mtx_lock(&sem_lock); 889efaa6588SAlfred Perlstein if (ks->ks_waiters != 0) { 8906bc1e9cdSJohn Baldwin mtx_unlock(&sem_lock); 891efaa6588SAlfred Perlstein error = EBUSY; 892efaa6588SAlfred Perlstein goto err; 893efaa6588SAlfred Perlstein } 8946bc1e9cdSJohn Baldwin ks->ks_flags |= KS_DEAD; 895efaa6588SAlfred Perlstein mtx_unlock(&sem_lock); 8966bc1e9cdSJohn Baldwin 8976bc1e9cdSJohn Baldwin error = kern_close(td, uap->id); 8986bc1e9cdSJohn Baldwin err: 8996bc1e9cdSJohn Baldwin fdrop(fp, td); 900efaa6588SAlfred Perlstein return (error); 901efaa6588SAlfred Perlstein } 902efaa6588SAlfred Perlstein 9030e5d5bc2SKonstantin Belousov static struct syscall_helper_data ksem_syscalls[] = { 9040e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_init), 9050e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_open), 9060e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_unlink), 9070e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_close), 9080e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_post), 9090e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_wait), 9100e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_timedwait), 9110e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_trywait), 9120e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_getvalue), 9130e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_destroy), 9140e5d5bc2SKonstantin Belousov SYSCALL_INIT_LAST 9150e5d5bc2SKonstantin Belousov }; 9166bc1e9cdSJohn Baldwin 9170e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 9180e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32.h> 9190e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32_proto.h> 9200e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32_signal.h> 9210e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32_syscall.h> 9220e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32_util.h> 9236bc1e9cdSJohn Baldwin 9240e5d5bc2SKonstantin Belousov int 9250e5d5bc2SKonstantin Belousov freebsd32_ksem_init(struct thread *td, struct freebsd32_ksem_init_args *uap) 9260e5d5bc2SKonstantin Belousov { 9276bc1e9cdSJohn Baldwin 9280e5d5bc2SKonstantin Belousov return (ksem_create(td, NULL, uap->idp, S_IRWXU | S_IRWXG, uap->value, 9290e5d5bc2SKonstantin Belousov 0, 1)); 9300e5d5bc2SKonstantin Belousov } 9310e5d5bc2SKonstantin Belousov 9320e5d5bc2SKonstantin Belousov int 9330e5d5bc2SKonstantin Belousov freebsd32_ksem_open(struct thread *td, struct freebsd32_ksem_open_args *uap) 9340e5d5bc2SKonstantin Belousov { 9350e5d5bc2SKonstantin Belousov 9360e5d5bc2SKonstantin Belousov if ((uap->oflag & ~(O_CREAT | O_EXCL)) != 0) 9370e5d5bc2SKonstantin Belousov return (EINVAL); 9380e5d5bc2SKonstantin Belousov return (ksem_create(td, uap->name, uap->idp, uap->mode, uap->value, 9390e5d5bc2SKonstantin Belousov uap->oflag, 1)); 9400e5d5bc2SKonstantin Belousov } 9410e5d5bc2SKonstantin Belousov 9420e5d5bc2SKonstantin Belousov int 9430e5d5bc2SKonstantin Belousov freebsd32_ksem_timedwait(struct thread *td, 9440e5d5bc2SKonstantin Belousov struct freebsd32_ksem_timedwait_args *uap) 9450e5d5bc2SKonstantin Belousov { 9460e5d5bc2SKonstantin Belousov struct timespec32 abstime32; 9470e5d5bc2SKonstantin Belousov struct timespec *ts, abstime; 9480e5d5bc2SKonstantin Belousov int error; 9490e5d5bc2SKonstantin Belousov 9500e5d5bc2SKonstantin Belousov /* 9510e5d5bc2SKonstantin Belousov * We allow a null timespec (wait forever). 9520e5d5bc2SKonstantin Belousov */ 9530e5d5bc2SKonstantin Belousov if (uap->abstime == NULL) 9540e5d5bc2SKonstantin Belousov ts = NULL; 9550e5d5bc2SKonstantin Belousov else { 9560e5d5bc2SKonstantin Belousov error = copyin(uap->abstime, &abstime32, sizeof(abstime32)); 9570e5d5bc2SKonstantin Belousov if (error != 0) 9580e5d5bc2SKonstantin Belousov return (error); 9590e5d5bc2SKonstantin Belousov CP(abstime32, abstime, tv_sec); 9600e5d5bc2SKonstantin Belousov CP(abstime32, abstime, tv_nsec); 9610e5d5bc2SKonstantin Belousov if (abstime.tv_nsec >= 1000000000 || abstime.tv_nsec < 0) 9620e5d5bc2SKonstantin Belousov return (EINVAL); 9630e5d5bc2SKonstantin Belousov ts = &abstime; 9640e5d5bc2SKonstantin Belousov } 9650e5d5bc2SKonstantin Belousov return (kern_sem_wait(td, uap->id, 0, ts)); 9660e5d5bc2SKonstantin Belousov } 9670e5d5bc2SKonstantin Belousov 9680e5d5bc2SKonstantin Belousov static struct syscall_helper_data ksem32_syscalls[] = { 9690e5d5bc2SKonstantin Belousov SYSCALL32_INIT_HELPER(freebsd32_ksem_init), 9700e5d5bc2SKonstantin Belousov SYSCALL32_INIT_HELPER(freebsd32_ksem_open), 9718451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_unlink), 9728451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_close), 9738451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_post), 9748451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_wait), 9750e5d5bc2SKonstantin Belousov SYSCALL32_INIT_HELPER(freebsd32_ksem_timedwait), 9768451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_trywait), 9778451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_getvalue), 9788451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_destroy), 9790e5d5bc2SKonstantin Belousov SYSCALL_INIT_LAST 9800e5d5bc2SKonstantin Belousov }; 9810e5d5bc2SKonstantin Belousov #endif 9826bc1e9cdSJohn Baldwin 983590f242cSRobert Watson static int 9846bc1e9cdSJohn Baldwin ksem_module_init(void) 985590f242cSRobert Watson { 9866bc1e9cdSJohn Baldwin int error; 987590f242cSRobert Watson 9886bc1e9cdSJohn Baldwin mtx_init(&sem_lock, "sem", NULL, MTX_DEF); 9896bc1e9cdSJohn Baldwin mtx_init(&ksem_count_lock, "ksem count", NULL, MTX_DEF); 9906bc1e9cdSJohn Baldwin sx_init(&ksem_dict_lock, "ksem dictionary"); 9916bc1e9cdSJohn Baldwin ksem_dictionary = hashinit(1024, M_KSEM, &ksem_hash); 9922e7758a8SJohn Baldwin p31b_setcfg(CTL_P1003_1B_SEMAPHORES, 200112L); 9936bc1e9cdSJohn Baldwin p31b_setcfg(CTL_P1003_1B_SEM_NSEMS_MAX, SEM_MAX); 9946bc1e9cdSJohn Baldwin p31b_setcfg(CTL_P1003_1B_SEM_VALUE_MAX, SEM_VALUE_MAX); 995590f242cSRobert Watson 996e015b1abSMateusz Guzik error = syscall_helper_register(ksem_syscalls, SY_THR_STATIC_KLD); 9970e5d5bc2SKonstantin Belousov if (error) 9980e5d5bc2SKonstantin Belousov return (error); 9990e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 1000e015b1abSMateusz Guzik error = syscall32_helper_register(ksem32_syscalls, SY_THR_STATIC_KLD); 10010e5d5bc2SKonstantin Belousov if (error) 10020e5d5bc2SKonstantin Belousov return (error); 10030e5d5bc2SKonstantin Belousov #endif 10046bc1e9cdSJohn Baldwin return (0); 1005590f242cSRobert Watson } 1006590f242cSRobert Watson 1007c3053131SPoul-Henning Kamp static void 10086bc1e9cdSJohn Baldwin ksem_module_destroy(void) 1009993182e5SAlexander Leidinger { 1010993182e5SAlexander Leidinger 10110e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 10120e5d5bc2SKonstantin Belousov syscall32_helper_unregister(ksem32_syscalls); 10130e5d5bc2SKonstantin Belousov #endif 10140e5d5bc2SKonstantin Belousov syscall_helper_unregister(ksem_syscalls); 1015efaa6588SAlfred Perlstein 10162e7758a8SJohn Baldwin p31b_setcfg(CTL_P1003_1B_SEMAPHORES, 0); 10176bc1e9cdSJohn Baldwin hashdestroy(ksem_dictionary, M_KSEM, ksem_hash); 10186bc1e9cdSJohn Baldwin sx_destroy(&ksem_dict_lock); 10196bc1e9cdSJohn Baldwin mtx_destroy(&ksem_count_lock); 10206bc1e9cdSJohn Baldwin mtx_destroy(&sem_lock); 102132863754SKonstantin Belousov p31b_unsetcfg(CTL_P1003_1B_SEM_VALUE_MAX); 102232863754SKonstantin Belousov p31b_unsetcfg(CTL_P1003_1B_SEM_NSEMS_MAX); 1023efaa6588SAlfred Perlstein } 1024efaa6588SAlfred Perlstein 1025efaa6588SAlfred Perlstein static int 1026efaa6588SAlfred Perlstein sem_modload(struct module *module, int cmd, void *arg) 1027efaa6588SAlfred Perlstein { 1028efaa6588SAlfred Perlstein int error = 0; 1029efaa6588SAlfred Perlstein 1030efaa6588SAlfred Perlstein switch (cmd) { 1031efaa6588SAlfred Perlstein case MOD_LOAD: 10326bc1e9cdSJohn Baldwin error = ksem_module_init(); 10336bc1e9cdSJohn Baldwin if (error) 10346bc1e9cdSJohn Baldwin ksem_module_destroy(); 1035efaa6588SAlfred Perlstein break; 10368e230e30SRobert Watson 1037efaa6588SAlfred Perlstein case MOD_UNLOAD: 10386bc1e9cdSJohn Baldwin mtx_lock(&ksem_count_lock); 1039efaa6588SAlfred Perlstein if (nsems != 0) { 1040efaa6588SAlfred Perlstein error = EOPNOTSUPP; 10416bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 1042efaa6588SAlfred Perlstein break; 1043efaa6588SAlfred Perlstein } 10446bc1e9cdSJohn Baldwin ksem_dead = 1; 10456bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 10466bc1e9cdSJohn Baldwin ksem_module_destroy(); 1047efaa6588SAlfred Perlstein break; 10488e230e30SRobert Watson 1049efaa6588SAlfred Perlstein case MOD_SHUTDOWN: 1050efaa6588SAlfred Perlstein break; 1051efaa6588SAlfred Perlstein default: 1052efaa6588SAlfred Perlstein error = EINVAL; 1053efaa6588SAlfred Perlstein break; 1054efaa6588SAlfred Perlstein } 1055efaa6588SAlfred Perlstein return (error); 1056efaa6588SAlfred Perlstein } 1057efaa6588SAlfred Perlstein 1058efaa6588SAlfred Perlstein static moduledata_t sem_mod = { 1059efaa6588SAlfred Perlstein "sem", 1060efaa6588SAlfred Perlstein &sem_modload, 1061efaa6588SAlfred Perlstein NULL 1062efaa6588SAlfred Perlstein }; 1063efaa6588SAlfred Perlstein 1064efaa6588SAlfred Perlstein DECLARE_MODULE(sem, sem_mod, SI_SUB_SYSV_SEM, SI_ORDER_FIRST); 1065efaa6588SAlfred Perlstein MODULE_VERSION(sem, 1); 1066