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> 47cc7b259aSJamie Gritton #include <sys/jail.h> 48efaa6588SAlfred Perlstein #include <sys/kernel.h> 496aeb05d7STom Rhodes #include <sys/ksem.h> 506bc1e9cdSJohn Baldwin #include <sys/lock.h> 516bc1e9cdSJohn Baldwin #include <sys/malloc.h> 526bc1e9cdSJohn Baldwin #include <sys/module.h> 536bc1e9cdSJohn Baldwin #include <sys/mutex.h> 54acd3428bSRobert Watson #include <sys/priv.h> 55efaa6588SAlfred Perlstein #include <sys/proc.h> 566aeb05d7STom Rhodes #include <sys/posix4.h> 576aeb05d7STom Rhodes #include <sys/_semaphore.h> 586bc1e9cdSJohn Baldwin #include <sys/stat.h> 596bc1e9cdSJohn Baldwin #include <sys/syscall.h> 606bc1e9cdSJohn Baldwin #include <sys/syscallsubr.h> 616bc1e9cdSJohn Baldwin #include <sys/sysctl.h> 626bc1e9cdSJohn Baldwin #include <sys/sysent.h> 636bc1e9cdSJohn Baldwin #include <sys/sysproto.h> 646bc1e9cdSJohn Baldwin #include <sys/systm.h> 656bc1e9cdSJohn Baldwin #include <sys/sx.h> 669696feebSJohn Baldwin #include <sys/user.h> 676bc1e9cdSJohn Baldwin #include <sys/vnode.h> 68efaa6588SAlfred Perlstein 69aed55708SRobert Watson #include <security/mac/mac_framework.h> 70aed55708SRobert Watson 719a253c10SAlexander Leidinger FEATURE(p1003_1b_semaphores, "POSIX P1003.1B semaphores support"); 726bc1e9cdSJohn Baldwin /* 736bc1e9cdSJohn Baldwin * TODO 746bc1e9cdSJohn Baldwin * 756bc1e9cdSJohn Baldwin * - Resource limits? 766bc1e9cdSJohn Baldwin * - Replace global sem_lock with mtx_pool locks? 776bc1e9cdSJohn Baldwin * - Add a MAC check_create() hook for creating new named semaphores. 786bc1e9cdSJohn Baldwin */ 79efaa6588SAlfred Perlstein 80efaa6588SAlfred Perlstein #ifndef SEM_MAX 81efaa6588SAlfred Perlstein #define SEM_MAX 30 82efaa6588SAlfred Perlstein #endif 83efaa6588SAlfred Perlstein 84c814aa3fSAlfred Perlstein #ifdef SEM_DEBUG 85c814aa3fSAlfred Perlstein #define DP(x) printf x 86c814aa3fSAlfred Perlstein #else 87c814aa3fSAlfred Perlstein #define DP(x) 88c814aa3fSAlfred Perlstein #endif 89c814aa3fSAlfred Perlstein 906bc1e9cdSJohn Baldwin struct ksem_mapping { 916bc1e9cdSJohn Baldwin char *km_path; 926bc1e9cdSJohn Baldwin Fnv32_t km_fnv; 936bc1e9cdSJohn Baldwin struct ksem *km_ksem; 946bc1e9cdSJohn Baldwin LIST_ENTRY(ksem_mapping) km_link; 956bc1e9cdSJohn Baldwin }; 966bc1e9cdSJohn Baldwin 976bc1e9cdSJohn Baldwin static MALLOC_DEFINE(M_KSEM, "ksem", "semaphore file descriptor"); 986bc1e9cdSJohn Baldwin static LIST_HEAD(, ksem_mapping) *ksem_dictionary; 996bc1e9cdSJohn Baldwin static struct sx ksem_dict_lock; 1006bc1e9cdSJohn Baldwin static struct mtx ksem_count_lock; 1016bc1e9cdSJohn Baldwin static struct mtx sem_lock; 1026bc1e9cdSJohn Baldwin static u_long ksem_hash; 1036bc1e9cdSJohn Baldwin static int ksem_dead; 1046bc1e9cdSJohn Baldwin 1056bc1e9cdSJohn Baldwin #define KSEM_HASH(fnv) (&ksem_dictionary[(fnv) & ksem_hash]) 1066bc1e9cdSJohn Baldwin 1076bc1e9cdSJohn Baldwin static int nsems = 0; 1086bc1e9cdSJohn Baldwin SYSCTL_DECL(_p1003_1b); 1096bc1e9cdSJohn Baldwin SYSCTL_INT(_p1003_1b, OID_AUTO, nsems, CTLFLAG_RD, &nsems, 0, 1106bc1e9cdSJohn Baldwin "Number of active kernel POSIX semaphores"); 1116bc1e9cdSJohn Baldwin 1126bc1e9cdSJohn Baldwin static int kern_sem_wait(struct thread *td, semid_t id, int tryflag, 1136bc1e9cdSJohn Baldwin struct timespec *abstime); 1146bc1e9cdSJohn Baldwin static int ksem_access(struct ksem *ks, struct ucred *ucred); 1156bc1e9cdSJohn Baldwin static struct ksem *ksem_alloc(struct ucred *ucred, mode_t mode, 1166bc1e9cdSJohn Baldwin unsigned int value); 1176bc1e9cdSJohn Baldwin static int ksem_create(struct thread *td, const char *path, 1186bc1e9cdSJohn Baldwin semid_t *semidp, mode_t mode, unsigned int value, 1190e5d5bc2SKonstantin Belousov int flags, int compat32); 1206bc1e9cdSJohn Baldwin static void ksem_drop(struct ksem *ks); 1217008be5bSPawel Jakub Dawidek static int ksem_get(struct thread *td, semid_t id, cap_rights_t *rightsp, 122a9d2f8d8SRobert Watson struct file **fpp); 1236bc1e9cdSJohn Baldwin static struct ksem *ksem_hold(struct ksem *ks); 1246bc1e9cdSJohn Baldwin static void ksem_insert(char *path, Fnv32_t fnv, struct ksem *ks); 1256bc1e9cdSJohn Baldwin static struct ksem *ksem_lookup(char *path, Fnv32_t fnv); 1266bc1e9cdSJohn Baldwin static void ksem_module_destroy(void); 1276bc1e9cdSJohn Baldwin static int ksem_module_init(void); 1286bc1e9cdSJohn Baldwin static int ksem_remove(char *path, Fnv32_t fnv, struct ucred *ucred); 1296bc1e9cdSJohn Baldwin static int sem_modload(struct module *module, int cmd, void *arg); 1306bc1e9cdSJohn Baldwin 1316bc1e9cdSJohn Baldwin static fo_stat_t ksem_stat; 1326bc1e9cdSJohn Baldwin static fo_close_t ksem_closef; 1339c00bb91SKonstantin Belousov static fo_chmod_t ksem_chmod; 1349c00bb91SKonstantin Belousov static fo_chown_t ksem_chown; 1359696feebSJohn Baldwin static fo_fill_kinfo_t ksem_fill_kinfo; 1366bc1e9cdSJohn Baldwin 1376bc1e9cdSJohn Baldwin /* File descriptor operations. */ 1386bc1e9cdSJohn Baldwin static struct fileops ksem_ops = { 1392d69d0dcSJohn Baldwin .fo_read = invfo_rdwr, 1402d69d0dcSJohn Baldwin .fo_write = invfo_rdwr, 1412d69d0dcSJohn Baldwin .fo_truncate = invfo_truncate, 1422d69d0dcSJohn Baldwin .fo_ioctl = invfo_ioctl, 1432d69d0dcSJohn Baldwin .fo_poll = invfo_poll, 1442d69d0dcSJohn Baldwin .fo_kqfilter = invfo_kqfilter, 1456bc1e9cdSJohn Baldwin .fo_stat = ksem_stat, 1466bc1e9cdSJohn Baldwin .fo_close = ksem_closef, 1479c00bb91SKonstantin Belousov .fo_chmod = ksem_chmod, 1489c00bb91SKonstantin Belousov .fo_chown = ksem_chown, 149ca04d21dSGleb Smirnoff .fo_sendfile = invfo_sendfile, 1509696feebSJohn Baldwin .fo_fill_kinfo = ksem_fill_kinfo, 1516bc1e9cdSJohn Baldwin .fo_flags = DFLAG_PASSABLE 1526bc1e9cdSJohn Baldwin }; 1536bc1e9cdSJohn Baldwin 1546bc1e9cdSJohn Baldwin FEATURE(posix_sem, "POSIX semaphores"); 1556bc1e9cdSJohn Baldwin 1566bc1e9cdSJohn Baldwin static int 1576bc1e9cdSJohn Baldwin ksem_stat(struct file *fp, struct stat *sb, struct ucred *active_cred, 1586bc1e9cdSJohn Baldwin struct thread *td) 1596bc1e9cdSJohn Baldwin { 1606bc1e9cdSJohn Baldwin struct ksem *ks; 1616bc1e9cdSJohn Baldwin #ifdef MAC 1626bc1e9cdSJohn Baldwin int error; 1636bc1e9cdSJohn Baldwin #endif 1646bc1e9cdSJohn Baldwin 1656bc1e9cdSJohn Baldwin ks = fp->f_data; 1666bc1e9cdSJohn Baldwin 1676bc1e9cdSJohn Baldwin #ifdef MAC 1686bc1e9cdSJohn Baldwin error = mac_posixsem_check_stat(active_cred, fp->f_cred, ks); 1696bc1e9cdSJohn Baldwin if (error) 1706bc1e9cdSJohn Baldwin return (error); 1716bc1e9cdSJohn Baldwin #endif 1726bc1e9cdSJohn Baldwin 1736bc1e9cdSJohn Baldwin /* 1746bc1e9cdSJohn Baldwin * Attempt to return sanish values for fstat() on a semaphore 1756bc1e9cdSJohn Baldwin * file descriptor. 1766bc1e9cdSJohn Baldwin */ 1776bc1e9cdSJohn Baldwin bzero(sb, sizeof(*sb)); 1786bc1e9cdSJohn Baldwin 1799c00bb91SKonstantin Belousov mtx_lock(&sem_lock); 180510ea843SEd Schouten sb->st_atim = ks->ks_atime; 181510ea843SEd Schouten sb->st_ctim = ks->ks_ctime; 182510ea843SEd Schouten sb->st_mtim = ks->ks_mtime; 183510ea843SEd Schouten sb->st_birthtim = ks->ks_birthtime; 1846bc1e9cdSJohn Baldwin sb->st_uid = ks->ks_uid; 1856bc1e9cdSJohn Baldwin sb->st_gid = ks->ks_gid; 1869c00bb91SKonstantin Belousov sb->st_mode = S_IFREG | ks->ks_mode; /* XXX */ 1879c00bb91SKonstantin Belousov mtx_unlock(&sem_lock); 1886bc1e9cdSJohn Baldwin 1896bc1e9cdSJohn Baldwin return (0); 1906bc1e9cdSJohn Baldwin } 1916bc1e9cdSJohn Baldwin 1926bc1e9cdSJohn Baldwin static int 1939c00bb91SKonstantin Belousov ksem_chmod(struct file *fp, mode_t mode, struct ucred *active_cred, 1949c00bb91SKonstantin Belousov struct thread *td) 1959c00bb91SKonstantin Belousov { 1969c00bb91SKonstantin Belousov struct ksem *ks; 1979c00bb91SKonstantin Belousov int error; 1989c00bb91SKonstantin Belousov 1999c00bb91SKonstantin Belousov error = 0; 2009c00bb91SKonstantin Belousov ks = fp->f_data; 2019c00bb91SKonstantin Belousov mtx_lock(&sem_lock); 2029c00bb91SKonstantin Belousov #ifdef MAC 2039c00bb91SKonstantin Belousov error = mac_posixsem_check_setmode(active_cred, ks, mode); 2049c00bb91SKonstantin Belousov if (error != 0) 2059c00bb91SKonstantin Belousov goto out; 2069c00bb91SKonstantin Belousov #endif 2079c00bb91SKonstantin Belousov error = vaccess(VREG, ks->ks_mode, ks->ks_uid, ks->ks_gid, VADMIN, 2089c00bb91SKonstantin Belousov active_cred, NULL); 2099c00bb91SKonstantin Belousov if (error != 0) 2109c00bb91SKonstantin Belousov goto out; 2119c00bb91SKonstantin Belousov ks->ks_mode = mode & ACCESSPERMS; 2129c00bb91SKonstantin Belousov out: 2139c00bb91SKonstantin Belousov mtx_unlock(&sem_lock); 2149c00bb91SKonstantin Belousov return (error); 2159c00bb91SKonstantin Belousov } 2169c00bb91SKonstantin Belousov 2179c00bb91SKonstantin Belousov static int 2189c00bb91SKonstantin Belousov ksem_chown(struct file *fp, uid_t uid, gid_t gid, struct ucred *active_cred, 2199c00bb91SKonstantin Belousov struct thread *td) 2209c00bb91SKonstantin Belousov { 2219c00bb91SKonstantin Belousov struct ksem *ks; 2229c00bb91SKonstantin Belousov int error; 2239c00bb91SKonstantin Belousov 22468889ed6SKonstantin Belousov error = 0; 2259c00bb91SKonstantin Belousov ks = fp->f_data; 2269c00bb91SKonstantin Belousov mtx_lock(&sem_lock); 2279c00bb91SKonstantin Belousov #ifdef MAC 2289c00bb91SKonstantin Belousov error = mac_posixsem_check_setowner(active_cred, ks, uid, gid); 2299c00bb91SKonstantin Belousov if (error != 0) 2309c00bb91SKonstantin Belousov goto out; 2319c00bb91SKonstantin Belousov #endif 2329c00bb91SKonstantin Belousov if (uid == (uid_t)-1) 2339c00bb91SKonstantin Belousov uid = ks->ks_uid; 2349c00bb91SKonstantin Belousov if (gid == (gid_t)-1) 2359c00bb91SKonstantin Belousov gid = ks->ks_gid; 2369c00bb91SKonstantin Belousov if (((uid != ks->ks_uid && uid != active_cred->cr_uid) || 2379c00bb91SKonstantin Belousov (gid != ks->ks_gid && !groupmember(gid, active_cred))) && 2389c00bb91SKonstantin Belousov (error = priv_check_cred(active_cred, PRIV_VFS_CHOWN, 0))) 2399c00bb91SKonstantin Belousov goto out; 2409c00bb91SKonstantin Belousov ks->ks_uid = uid; 2419c00bb91SKonstantin Belousov ks->ks_gid = gid; 2429c00bb91SKonstantin Belousov out: 2439c00bb91SKonstantin Belousov mtx_unlock(&sem_lock); 2449c00bb91SKonstantin Belousov return (error); 2459c00bb91SKonstantin Belousov } 2469c00bb91SKonstantin Belousov 2479c00bb91SKonstantin Belousov static int 2486bc1e9cdSJohn Baldwin ksem_closef(struct file *fp, struct thread *td) 2496bc1e9cdSJohn Baldwin { 2506bc1e9cdSJohn Baldwin struct ksem *ks; 2516bc1e9cdSJohn Baldwin 2526bc1e9cdSJohn Baldwin ks = fp->f_data; 2536bc1e9cdSJohn Baldwin fp->f_data = NULL; 2546bc1e9cdSJohn Baldwin ksem_drop(ks); 2556bc1e9cdSJohn Baldwin 2566bc1e9cdSJohn Baldwin return (0); 2576bc1e9cdSJohn Baldwin } 2586bc1e9cdSJohn Baldwin 2599696feebSJohn Baldwin static int 2609696feebSJohn Baldwin ksem_fill_kinfo(struct file *fp, struct kinfo_file *kif, struct filedesc *fdp) 2619696feebSJohn Baldwin { 262cc7b259aSJamie Gritton const char *path, *pr_path; 2639696feebSJohn Baldwin struct ksem *ks; 264cc7b259aSJamie Gritton size_t pr_pathlen; 2659696feebSJohn Baldwin 2669696feebSJohn Baldwin kif->kf_type = KF_TYPE_SEM; 2679696feebSJohn Baldwin ks = fp->f_data; 2689696feebSJohn Baldwin mtx_lock(&sem_lock); 2699696feebSJohn Baldwin kif->kf_un.kf_sem.kf_sem_value = ks->ks_value; 2709696feebSJohn Baldwin kif->kf_un.kf_sem.kf_sem_mode = S_IFREG | ks->ks_mode; /* XXX */ 2719696feebSJohn Baldwin mtx_unlock(&sem_lock); 2729696feebSJohn Baldwin if (ks->ks_path != NULL) { 2739696feebSJohn Baldwin sx_slock(&ksem_dict_lock); 27444c16975SJamie Gritton if (ks->ks_path != NULL) { 275cc7b259aSJamie Gritton path = ks->ks_path; 276cc7b259aSJamie Gritton pr_path = curthread->td_ucred->cr_prison->pr_path; 27744c16975SJamie Gritton if (strcmp(pr_path, "/") != 0) { 27844c16975SJamie Gritton /* Return the jail-rooted pathname. */ 279cc7b259aSJamie Gritton pr_pathlen = strlen(pr_path); 280cc7b259aSJamie Gritton if (strncmp(path, pr_path, pr_pathlen) == 0 && 281cc7b259aSJamie Gritton path[pr_pathlen] == '/') 282cc7b259aSJamie Gritton path += pr_pathlen; 283cc7b259aSJamie Gritton } 284cc7b259aSJamie Gritton strlcpy(kif->kf_path, path, sizeof(kif->kf_path)); 285cc7b259aSJamie Gritton } 2869696feebSJohn Baldwin sx_sunlock(&ksem_dict_lock); 2879696feebSJohn Baldwin } 2889696feebSJohn Baldwin return (0); 2899696feebSJohn Baldwin } 2909696feebSJohn Baldwin 2916bc1e9cdSJohn Baldwin /* 2926bc1e9cdSJohn Baldwin * ksem object management including creation and reference counting 2936bc1e9cdSJohn Baldwin * routines. 2946bc1e9cdSJohn Baldwin */ 2956bc1e9cdSJohn Baldwin static struct ksem * 2966bc1e9cdSJohn Baldwin ksem_alloc(struct ucred *ucred, mode_t mode, unsigned int value) 2976bc1e9cdSJohn Baldwin { 2986bc1e9cdSJohn Baldwin struct ksem *ks; 2996bc1e9cdSJohn Baldwin 3006bc1e9cdSJohn Baldwin mtx_lock(&ksem_count_lock); 3016bc1e9cdSJohn Baldwin if (nsems == p31b_getcfg(CTL_P1003_1B_SEM_NSEMS_MAX) || ksem_dead) { 3026bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 3036bc1e9cdSJohn Baldwin return (NULL); 3046bc1e9cdSJohn Baldwin } 3056bc1e9cdSJohn Baldwin nsems++; 3066bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 3076bc1e9cdSJohn Baldwin ks = malloc(sizeof(*ks), M_KSEM, M_WAITOK | M_ZERO); 3086bc1e9cdSJohn Baldwin ks->ks_uid = ucred->cr_uid; 3096bc1e9cdSJohn Baldwin ks->ks_gid = ucred->cr_gid; 3106bc1e9cdSJohn Baldwin ks->ks_mode = mode; 3116bc1e9cdSJohn Baldwin ks->ks_value = value; 3126bc1e9cdSJohn Baldwin cv_init(&ks->ks_cv, "ksem"); 3136bc1e9cdSJohn Baldwin vfs_timestamp(&ks->ks_birthtime); 3146bc1e9cdSJohn Baldwin ks->ks_atime = ks->ks_mtime = ks->ks_ctime = ks->ks_birthtime; 3156bc1e9cdSJohn Baldwin refcount_init(&ks->ks_ref, 1); 3166bc1e9cdSJohn Baldwin #ifdef MAC 3176bc1e9cdSJohn Baldwin mac_posixsem_init(ks); 3186bc1e9cdSJohn Baldwin mac_posixsem_create(ucred, ks); 3196bc1e9cdSJohn Baldwin #endif 3206bc1e9cdSJohn Baldwin 3216bc1e9cdSJohn Baldwin return (ks); 3226bc1e9cdSJohn Baldwin } 3236bc1e9cdSJohn Baldwin 3246bc1e9cdSJohn Baldwin static struct ksem * 3256bc1e9cdSJohn Baldwin ksem_hold(struct ksem *ks) 3266bc1e9cdSJohn Baldwin { 3276bc1e9cdSJohn Baldwin 3286bc1e9cdSJohn Baldwin refcount_acquire(&ks->ks_ref); 3296bc1e9cdSJohn Baldwin return (ks); 3306bc1e9cdSJohn Baldwin } 3316bc1e9cdSJohn Baldwin 3326bc1e9cdSJohn Baldwin static void 3336bc1e9cdSJohn Baldwin ksem_drop(struct ksem *ks) 3346bc1e9cdSJohn Baldwin { 3356bc1e9cdSJohn Baldwin 3366bc1e9cdSJohn Baldwin if (refcount_release(&ks->ks_ref)) { 3376bc1e9cdSJohn Baldwin #ifdef MAC 3386bc1e9cdSJohn Baldwin mac_posixsem_destroy(ks); 3396bc1e9cdSJohn Baldwin #endif 3406bc1e9cdSJohn Baldwin cv_destroy(&ks->ks_cv); 3416bc1e9cdSJohn Baldwin free(ks, M_KSEM); 3426bc1e9cdSJohn Baldwin mtx_lock(&ksem_count_lock); 3436bc1e9cdSJohn Baldwin nsems--; 3446bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 3456bc1e9cdSJohn Baldwin } 3466bc1e9cdSJohn Baldwin } 3476bc1e9cdSJohn Baldwin 3486bc1e9cdSJohn Baldwin /* 3496bc1e9cdSJohn Baldwin * Determine if the credentials have sufficient permissions for read 3506bc1e9cdSJohn Baldwin * and write access. 3516bc1e9cdSJohn Baldwin */ 3526bc1e9cdSJohn Baldwin static int 3536bc1e9cdSJohn Baldwin ksem_access(struct ksem *ks, struct ucred *ucred) 3546bc1e9cdSJohn Baldwin { 355efaa6588SAlfred Perlstein int error; 356efaa6588SAlfred Perlstein 3576bc1e9cdSJohn Baldwin error = vaccess(VREG, ks->ks_mode, ks->ks_uid, ks->ks_gid, 3586bc1e9cdSJohn Baldwin VREAD | VWRITE, ucred, NULL); 3596bc1e9cdSJohn Baldwin if (error) 3606bc1e9cdSJohn Baldwin error = priv_check_cred(ucred, PRIV_SEM_WRITE, 0); 361efaa6588SAlfred Perlstein return (error); 362efaa6588SAlfred Perlstein } 363efaa6588SAlfred Perlstein 3646bc1e9cdSJohn Baldwin /* 3656bc1e9cdSJohn Baldwin * Dictionary management. We maintain an in-kernel dictionary to map 3666bc1e9cdSJohn Baldwin * paths to semaphore objects. We use the FNV hash on the path to 3676bc1e9cdSJohn Baldwin * store the mappings in a hash table. 3686bc1e9cdSJohn Baldwin */ 3696bc1e9cdSJohn Baldwin static struct ksem * 3706bc1e9cdSJohn Baldwin ksem_lookup(char *path, Fnv32_t fnv) 3716bc1e9cdSJohn Baldwin { 3726bc1e9cdSJohn Baldwin struct ksem_mapping *map; 3736bc1e9cdSJohn Baldwin 3746bc1e9cdSJohn Baldwin LIST_FOREACH(map, KSEM_HASH(fnv), km_link) { 3756bc1e9cdSJohn Baldwin if (map->km_fnv != fnv) 3766bc1e9cdSJohn Baldwin continue; 3776bc1e9cdSJohn Baldwin if (strcmp(map->km_path, path) == 0) 3786bc1e9cdSJohn Baldwin return (map->km_ksem); 3796bc1e9cdSJohn Baldwin } 3806bc1e9cdSJohn Baldwin 3816bc1e9cdSJohn Baldwin return (NULL); 3826bc1e9cdSJohn Baldwin } 3836bc1e9cdSJohn Baldwin 3846bc1e9cdSJohn Baldwin static void 3856bc1e9cdSJohn Baldwin ksem_insert(char *path, Fnv32_t fnv, struct ksem *ks) 3866bc1e9cdSJohn Baldwin { 3876bc1e9cdSJohn Baldwin struct ksem_mapping *map; 3886bc1e9cdSJohn Baldwin 3896bc1e9cdSJohn Baldwin map = malloc(sizeof(struct ksem_mapping), M_KSEM, M_WAITOK); 3906bc1e9cdSJohn Baldwin map->km_path = path; 3916bc1e9cdSJohn Baldwin map->km_fnv = fnv; 3926bc1e9cdSJohn Baldwin map->km_ksem = ksem_hold(ks); 393958aa575SJohn Baldwin ks->ks_path = path; 3946bc1e9cdSJohn Baldwin LIST_INSERT_HEAD(KSEM_HASH(fnv), map, km_link); 3956bc1e9cdSJohn Baldwin } 3966bc1e9cdSJohn Baldwin 3976bc1e9cdSJohn Baldwin static int 3986bc1e9cdSJohn Baldwin ksem_remove(char *path, Fnv32_t fnv, struct ucred *ucred) 3996bc1e9cdSJohn Baldwin { 4006bc1e9cdSJohn Baldwin struct ksem_mapping *map; 4016bc1e9cdSJohn Baldwin int error; 4026bc1e9cdSJohn Baldwin 4036bc1e9cdSJohn Baldwin LIST_FOREACH(map, KSEM_HASH(fnv), km_link) { 4046bc1e9cdSJohn Baldwin if (map->km_fnv != fnv) 4056bc1e9cdSJohn Baldwin continue; 4066bc1e9cdSJohn Baldwin if (strcmp(map->km_path, path) == 0) { 4076bc1e9cdSJohn Baldwin #ifdef MAC 4086bc1e9cdSJohn Baldwin error = mac_posixsem_check_unlink(ucred, map->km_ksem); 4096bc1e9cdSJohn Baldwin if (error) 4106bc1e9cdSJohn Baldwin return (error); 4116bc1e9cdSJohn Baldwin #endif 4126bc1e9cdSJohn Baldwin error = ksem_access(map->km_ksem, ucred); 4136bc1e9cdSJohn Baldwin if (error) 4146bc1e9cdSJohn Baldwin return (error); 415958aa575SJohn Baldwin map->km_ksem->ks_path = NULL; 4166bc1e9cdSJohn Baldwin LIST_REMOVE(map, km_link); 4176bc1e9cdSJohn Baldwin ksem_drop(map->km_ksem); 4186bc1e9cdSJohn Baldwin free(map->km_path, M_KSEM); 4196bc1e9cdSJohn Baldwin free(map, M_KSEM); 4206bc1e9cdSJohn Baldwin return (0); 4216bc1e9cdSJohn Baldwin } 4226bc1e9cdSJohn Baldwin } 4236bc1e9cdSJohn Baldwin 4246bc1e9cdSJohn Baldwin return (ENOENT); 4256bc1e9cdSJohn Baldwin } 4266bc1e9cdSJohn Baldwin 4270e5d5bc2SKonstantin Belousov static int 4280e5d5bc2SKonstantin Belousov ksem_create_copyout_semid(struct thread *td, semid_t *semidp, int fd, 4290e5d5bc2SKonstantin Belousov int compat32) 4300e5d5bc2SKonstantin Belousov { 4310e5d5bc2SKonstantin Belousov semid_t semid; 4320e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 4330e5d5bc2SKonstantin Belousov int32_t semid32; 4340e5d5bc2SKonstantin Belousov #endif 4350e5d5bc2SKonstantin Belousov void *ptr; 4360e5d5bc2SKonstantin Belousov size_t ptrs; 4370e5d5bc2SKonstantin Belousov 4380e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 4390e5d5bc2SKonstantin Belousov if (compat32) { 4400e5d5bc2SKonstantin Belousov semid32 = fd; 4410e5d5bc2SKonstantin Belousov ptr = &semid32; 4420e5d5bc2SKonstantin Belousov ptrs = sizeof(semid32); 4430e5d5bc2SKonstantin Belousov } else { 4440e5d5bc2SKonstantin Belousov #endif 4450e5d5bc2SKonstantin Belousov semid = fd; 4460e5d5bc2SKonstantin Belousov ptr = &semid; 4470e5d5bc2SKonstantin Belousov ptrs = sizeof(semid); 4480e5d5bc2SKonstantin Belousov compat32 = 0; /* silence gcc */ 4490e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 4500e5d5bc2SKonstantin Belousov } 4510e5d5bc2SKonstantin Belousov #endif 4520e5d5bc2SKonstantin Belousov 4530e5d5bc2SKonstantin Belousov return (copyout(ptr, semidp, ptrs)); 4540e5d5bc2SKonstantin Belousov } 4550e5d5bc2SKonstantin Belousov 4566bc1e9cdSJohn Baldwin /* Other helper routines. */ 4576bc1e9cdSJohn Baldwin static int 4586bc1e9cdSJohn Baldwin ksem_create(struct thread *td, const char *name, semid_t *semidp, mode_t mode, 4590e5d5bc2SKonstantin Belousov unsigned int value, int flags, int compat32) 4606bc1e9cdSJohn Baldwin { 4616bc1e9cdSJohn Baldwin struct filedesc *fdp; 4626bc1e9cdSJohn Baldwin struct ksem *ks; 4636bc1e9cdSJohn Baldwin struct file *fp; 4646bc1e9cdSJohn Baldwin char *path; 465cc7b259aSJamie Gritton const char *pr_path; 466cc7b259aSJamie Gritton size_t pr_pathlen; 4676bc1e9cdSJohn Baldwin Fnv32_t fnv; 4686bc1e9cdSJohn Baldwin int error, fd; 4696bc1e9cdSJohn Baldwin 4706bc1e9cdSJohn Baldwin if (value > SEM_VALUE_MAX) 4716bc1e9cdSJohn Baldwin return (EINVAL); 4726bc1e9cdSJohn Baldwin 4736bc1e9cdSJohn Baldwin fdp = td->td_proc->p_fd; 4746bc1e9cdSJohn Baldwin mode = (mode & ~fdp->fd_cmask) & ACCESSPERMS; 475b68cf25fSJilles Tjoelker error = falloc(td, &fp, &fd, O_CLOEXEC); 4766bc1e9cdSJohn Baldwin if (error) { 4776bc1e9cdSJohn Baldwin if (name == NULL) 4786bc1e9cdSJohn Baldwin error = ENOSPC; 4796bc1e9cdSJohn Baldwin return (error); 4806bc1e9cdSJohn Baldwin } 4816bc1e9cdSJohn Baldwin 4826bc1e9cdSJohn Baldwin /* 4836bc1e9cdSJohn Baldwin * Go ahead and copyout the file descriptor now. This is a bit 4846bc1e9cdSJohn Baldwin * premature, but it is a lot easier to handle errors as opposed 4856bc1e9cdSJohn Baldwin * to later when we've possibly created a new semaphore, etc. 4866bc1e9cdSJohn Baldwin */ 4870e5d5bc2SKonstantin Belousov error = ksem_create_copyout_semid(td, semidp, fd, compat32); 4886bc1e9cdSJohn Baldwin if (error) { 48990f54cbfSMateusz Guzik fdclose(td, fp, fd); 4906bc1e9cdSJohn Baldwin fdrop(fp, td); 4916bc1e9cdSJohn Baldwin return (error); 4926bc1e9cdSJohn Baldwin } 4936bc1e9cdSJohn Baldwin 4946bc1e9cdSJohn Baldwin if (name == NULL) { 4956bc1e9cdSJohn Baldwin /* Create an anonymous semaphore. */ 4966bc1e9cdSJohn Baldwin ks = ksem_alloc(td->td_ucred, mode, value); 4976bc1e9cdSJohn Baldwin if (ks == NULL) 4986bc1e9cdSJohn Baldwin error = ENOSPC; 4996bc1e9cdSJohn Baldwin else 5006bc1e9cdSJohn Baldwin ks->ks_flags |= KS_ANONYMOUS; 5016bc1e9cdSJohn Baldwin } else { 5026bc1e9cdSJohn Baldwin path = malloc(MAXPATHLEN, M_KSEM, M_WAITOK); 503cc7b259aSJamie Gritton pr_path = td->td_ucred->cr_prison->pr_path; 50444c16975SJamie Gritton 50544c16975SJamie Gritton /* Construct a full pathname for jailed callers. */ 506cc7b259aSJamie Gritton pr_pathlen = strcmp(pr_path, "/") == 0 ? 0 507cc7b259aSJamie Gritton : strlcpy(path, pr_path, MAXPATHLEN); 508cc7b259aSJamie Gritton error = copyinstr(name, path + pr_pathlen, 509cc7b259aSJamie Gritton MAXPATHLEN - pr_pathlen, NULL); 5106bc1e9cdSJohn Baldwin 5116bc1e9cdSJohn Baldwin /* Require paths to start with a '/' character. */ 512cc7b259aSJamie Gritton if (error == 0 && path[pr_pathlen] != '/') 5136bc1e9cdSJohn Baldwin error = EINVAL; 5146bc1e9cdSJohn Baldwin if (error) { 51590f54cbfSMateusz Guzik fdclose(td, fp, fd); 5166bc1e9cdSJohn Baldwin fdrop(fp, td); 5176bc1e9cdSJohn Baldwin free(path, M_KSEM); 5186bc1e9cdSJohn Baldwin return (error); 5196bc1e9cdSJohn Baldwin } 5206bc1e9cdSJohn Baldwin 5216bc1e9cdSJohn Baldwin fnv = fnv_32_str(path, FNV1_32_INIT); 5226bc1e9cdSJohn Baldwin sx_xlock(&ksem_dict_lock); 5236bc1e9cdSJohn Baldwin ks = ksem_lookup(path, fnv); 5246bc1e9cdSJohn Baldwin if (ks == NULL) { 5256bc1e9cdSJohn Baldwin /* Object does not exist, create it if requested. */ 5266bc1e9cdSJohn Baldwin if (flags & O_CREAT) { 5276bc1e9cdSJohn Baldwin ks = ksem_alloc(td->td_ucred, mode, value); 5286bc1e9cdSJohn Baldwin if (ks == NULL) 5296bc1e9cdSJohn Baldwin error = ENFILE; 5306bc1e9cdSJohn Baldwin else { 5316bc1e9cdSJohn Baldwin ksem_insert(path, fnv, ks); 5326bc1e9cdSJohn Baldwin path = NULL; 5336bc1e9cdSJohn Baldwin } 5346bc1e9cdSJohn Baldwin } else 5356bc1e9cdSJohn Baldwin error = ENOENT; 5366bc1e9cdSJohn Baldwin } else { 5376bc1e9cdSJohn Baldwin /* 5386bc1e9cdSJohn Baldwin * Object already exists, obtain a new 5396bc1e9cdSJohn Baldwin * reference if requested and permitted. 5406bc1e9cdSJohn Baldwin */ 5416bc1e9cdSJohn Baldwin if ((flags & (O_CREAT | O_EXCL)) == 5426bc1e9cdSJohn Baldwin (O_CREAT | O_EXCL)) 5436bc1e9cdSJohn Baldwin error = EEXIST; 5446bc1e9cdSJohn Baldwin else { 5456bc1e9cdSJohn Baldwin #ifdef MAC 5466bc1e9cdSJohn Baldwin error = mac_posixsem_check_open(td->td_ucred, 5476bc1e9cdSJohn Baldwin ks); 5486bc1e9cdSJohn Baldwin if (error == 0) 5496bc1e9cdSJohn Baldwin #endif 5506bc1e9cdSJohn Baldwin error = ksem_access(ks, td->td_ucred); 5516bc1e9cdSJohn Baldwin } 5526bc1e9cdSJohn Baldwin if (error == 0) 5536bc1e9cdSJohn Baldwin ksem_hold(ks); 5546bc1e9cdSJohn Baldwin #ifdef INVARIANTS 5556bc1e9cdSJohn Baldwin else 5566bc1e9cdSJohn Baldwin ks = NULL; 5576bc1e9cdSJohn Baldwin #endif 5586bc1e9cdSJohn Baldwin } 5596bc1e9cdSJohn Baldwin sx_xunlock(&ksem_dict_lock); 5606bc1e9cdSJohn Baldwin if (path) 5616bc1e9cdSJohn Baldwin free(path, M_KSEM); 5626bc1e9cdSJohn Baldwin } 5636bc1e9cdSJohn Baldwin 5646bc1e9cdSJohn Baldwin if (error) { 5656bc1e9cdSJohn Baldwin KASSERT(ks == NULL, ("ksem_create error with a ksem")); 56690f54cbfSMateusz Guzik fdclose(td, fp, fd); 5676bc1e9cdSJohn Baldwin fdrop(fp, td); 5686bc1e9cdSJohn Baldwin return (error); 5696bc1e9cdSJohn Baldwin } 5706bc1e9cdSJohn Baldwin KASSERT(ks != NULL, ("ksem_create w/o a ksem")); 5716bc1e9cdSJohn Baldwin 5726bc1e9cdSJohn Baldwin finit(fp, FREAD | FWRITE, DTYPE_SEM, ks, &ksem_ops); 5736bc1e9cdSJohn Baldwin 5746bc1e9cdSJohn Baldwin fdrop(fp, td); 5756bc1e9cdSJohn Baldwin 5766bc1e9cdSJohn Baldwin return (0); 5776bc1e9cdSJohn Baldwin } 5786bc1e9cdSJohn Baldwin 5796bc1e9cdSJohn Baldwin static int 5807008be5bSPawel Jakub Dawidek ksem_get(struct thread *td, semid_t id, cap_rights_t *rightsp, 5817008be5bSPawel Jakub Dawidek struct file **fpp) 5826bc1e9cdSJohn Baldwin { 5836bc1e9cdSJohn Baldwin struct ksem *ks; 5846bc1e9cdSJohn Baldwin struct file *fp; 5856bc1e9cdSJohn Baldwin int error; 5866bc1e9cdSJohn Baldwin 5877008be5bSPawel Jakub Dawidek error = fget(td, id, rightsp, &fp); 5886bc1e9cdSJohn Baldwin if (error) 5896bc1e9cdSJohn Baldwin return (EINVAL); 5906bc1e9cdSJohn Baldwin if (fp->f_type != DTYPE_SEM) { 5916bc1e9cdSJohn Baldwin fdrop(fp, td); 5926bc1e9cdSJohn Baldwin return (EINVAL); 5936bc1e9cdSJohn Baldwin } 5946bc1e9cdSJohn Baldwin ks = fp->f_data; 5956bc1e9cdSJohn Baldwin if (ks->ks_flags & KS_DEAD) { 5966bc1e9cdSJohn Baldwin fdrop(fp, td); 5976bc1e9cdSJohn Baldwin return (EINVAL); 5986bc1e9cdSJohn Baldwin } 5996bc1e9cdSJohn Baldwin *fpp = fp; 6006bc1e9cdSJohn Baldwin return (0); 6016bc1e9cdSJohn Baldwin } 6026bc1e9cdSJohn Baldwin 6036bc1e9cdSJohn Baldwin /* System calls. */ 604efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 605efaa6588SAlfred Perlstein struct ksem_init_args { 606efaa6588SAlfred Perlstein unsigned int value; 607efaa6588SAlfred Perlstein semid_t *idp; 608efaa6588SAlfred Perlstein }; 609efaa6588SAlfred Perlstein #endif 610efaa6588SAlfred Perlstein int 6118451d0ddSKip Macy sys_ksem_init(struct thread *td, struct ksem_init_args *uap) 612efaa6588SAlfred Perlstein { 613efaa6588SAlfred Perlstein 6146bc1e9cdSJohn Baldwin return (ksem_create(td, NULL, uap->idp, S_IRWXU | S_IRWXG, uap->value, 6150e5d5bc2SKonstantin Belousov 0, 0)); 616efaa6588SAlfred Perlstein } 617efaa6588SAlfred Perlstein 618efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 619efaa6588SAlfred Perlstein struct ksem_open_args { 620efaa6588SAlfred Perlstein char *name; 621efaa6588SAlfred Perlstein int oflag; 622efaa6588SAlfred Perlstein mode_t mode; 623efaa6588SAlfred Perlstein unsigned int value; 624efaa6588SAlfred Perlstein semid_t *idp; 625efaa6588SAlfred Perlstein }; 626efaa6588SAlfred Perlstein #endif 627efaa6588SAlfred Perlstein int 6288451d0ddSKip Macy sys_ksem_open(struct thread *td, struct ksem_open_args *uap) 629efaa6588SAlfred Perlstein { 630efaa6588SAlfred Perlstein 631b2966a5aSBruce M Simpson DP((">>> ksem_open start, pid=%d\n", (int)td->td_proc->p_pid)); 632b2966a5aSBruce M Simpson 6336bc1e9cdSJohn Baldwin if ((uap->oflag & ~(O_CREAT | O_EXCL)) != 0) 634b3890a1cSAlfred Perlstein return (EINVAL); 6356bc1e9cdSJohn Baldwin return (ksem_create(td, uap->name, uap->idp, uap->mode, uap->value, 6360e5d5bc2SKonstantin Belousov uap->oflag, 0)); 637efaa6588SAlfred Perlstein } 638efaa6588SAlfred Perlstein 639efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 640efaa6588SAlfred Perlstein struct ksem_unlink_args { 641efaa6588SAlfred Perlstein char *name; 642efaa6588SAlfred Perlstein }; 643efaa6588SAlfred Perlstein #endif 644efaa6588SAlfred Perlstein int 6458451d0ddSKip Macy sys_ksem_unlink(struct thread *td, struct ksem_unlink_args *uap) 646efaa6588SAlfred Perlstein { 6476bc1e9cdSJohn Baldwin char *path; 648cc7b259aSJamie Gritton const char *pr_path; 649cc7b259aSJamie Gritton size_t pr_pathlen; 6506bc1e9cdSJohn Baldwin Fnv32_t fnv; 651efaa6588SAlfred Perlstein int error; 652efaa6588SAlfred Perlstein 6536bc1e9cdSJohn Baldwin path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); 654cc7b259aSJamie Gritton pr_path = td->td_ucred->cr_prison->pr_path; 655cc7b259aSJamie Gritton pr_pathlen = strcmp(pr_path, "/") == 0 ? 0 656cc7b259aSJamie Gritton : strlcpy(path, pr_path, MAXPATHLEN); 657cc7b259aSJamie Gritton error = copyinstr(uap->name, path + pr_pathlen, MAXPATHLEN - pr_pathlen, 658cc7b259aSJamie Gritton NULL); 65952648411SRobert Watson if (error) { 6606bc1e9cdSJohn Baldwin free(path, M_TEMP); 66152648411SRobert Watson return (error); 66252648411SRobert Watson } 6636bc1e9cdSJohn Baldwin 6646bc1e9cdSJohn Baldwin fnv = fnv_32_str(path, FNV1_32_INIT); 6656bc1e9cdSJohn Baldwin sx_xlock(&ksem_dict_lock); 6666bc1e9cdSJohn Baldwin error = ksem_remove(path, fnv, td->td_ucred); 6676bc1e9cdSJohn Baldwin sx_xunlock(&ksem_dict_lock); 6686bc1e9cdSJohn Baldwin free(path, M_TEMP); 6696bc1e9cdSJohn Baldwin 670efaa6588SAlfred Perlstein return (error); 671efaa6588SAlfred Perlstein } 672efaa6588SAlfred Perlstein 673efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 674efaa6588SAlfred Perlstein struct ksem_close_args { 675efaa6588SAlfred Perlstein semid_t id; 676efaa6588SAlfred Perlstein }; 677efaa6588SAlfred Perlstein #endif 678efaa6588SAlfred Perlstein int 6798451d0ddSKip Macy sys_ksem_close(struct thread *td, struct ksem_close_args *uap) 680efaa6588SAlfred Perlstein { 681ef88ae77SSergey Kandaurov cap_rights_t rights; 682efaa6588SAlfred Perlstein struct ksem *ks; 6836bc1e9cdSJohn Baldwin struct file *fp; 684efaa6588SAlfred Perlstein int error; 685efaa6588SAlfred Perlstein 686a9d2f8d8SRobert Watson /* No capability rights required to close a semaphore. */ 687ef88ae77SSergey Kandaurov error = ksem_get(td, uap->id, cap_rights_init(&rights), &fp); 6886bc1e9cdSJohn Baldwin if (error) 6896bc1e9cdSJohn Baldwin return (error); 6906bc1e9cdSJohn Baldwin ks = fp->f_data; 6916bc1e9cdSJohn Baldwin if (ks->ks_flags & KS_ANONYMOUS) { 6926bc1e9cdSJohn Baldwin fdrop(fp, td); 6936bc1e9cdSJohn Baldwin return (EINVAL); 6946bc1e9cdSJohn Baldwin } 6956bc1e9cdSJohn Baldwin error = kern_close(td, uap->id); 6966bc1e9cdSJohn Baldwin fdrop(fp, td); 697b3890a1cSAlfred Perlstein return (error); 698efaa6588SAlfred Perlstein } 699efaa6588SAlfred Perlstein 700efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 701efaa6588SAlfred Perlstein struct ksem_post_args { 702efaa6588SAlfred Perlstein semid_t id; 703efaa6588SAlfred Perlstein }; 704efaa6588SAlfred Perlstein #endif 705efaa6588SAlfred Perlstein int 7068451d0ddSKip Macy sys_ksem_post(struct thread *td, struct ksem_post_args *uap) 707efaa6588SAlfred Perlstein { 7087008be5bSPawel Jakub Dawidek cap_rights_t rights; 7096bc1e9cdSJohn Baldwin struct file *fp; 710efaa6588SAlfred Perlstein struct ksem *ks; 711efaa6588SAlfred Perlstein int error; 712efaa6588SAlfred Perlstein 7137008be5bSPawel Jakub Dawidek error = ksem_get(td, uap->id, 7147008be5bSPawel Jakub Dawidek cap_rights_init(&rights, CAP_SEM_POST), &fp); 7156bc1e9cdSJohn Baldwin if (error) 7166bc1e9cdSJohn Baldwin return (error); 7176bc1e9cdSJohn Baldwin ks = fp->f_data; 7186bc1e9cdSJohn Baldwin 719efaa6588SAlfred Perlstein mtx_lock(&sem_lock); 72052648411SRobert Watson #ifdef MAC 7216bc1e9cdSJohn Baldwin error = mac_posixsem_check_post(td->td_ucred, fp->f_cred, ks); 72252648411SRobert Watson if (error) 72352648411SRobert Watson goto err; 72452648411SRobert Watson #endif 725efaa6588SAlfred Perlstein if (ks->ks_value == SEM_VALUE_MAX) { 726efaa6588SAlfred Perlstein error = EOVERFLOW; 727efaa6588SAlfred Perlstein goto err; 728efaa6588SAlfred Perlstein } 729efaa6588SAlfred Perlstein ++ks->ks_value; 730efaa6588SAlfred Perlstein if (ks->ks_waiters > 0) 731efaa6588SAlfred Perlstein cv_signal(&ks->ks_cv); 732efaa6588SAlfred Perlstein error = 0; 7336bc1e9cdSJohn Baldwin vfs_timestamp(&ks->ks_ctime); 734efaa6588SAlfred Perlstein err: 735efaa6588SAlfred Perlstein mtx_unlock(&sem_lock); 7366bc1e9cdSJohn Baldwin fdrop(fp, td); 737efaa6588SAlfred Perlstein return (error); 738efaa6588SAlfred Perlstein } 739efaa6588SAlfred Perlstein 740efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 741efaa6588SAlfred Perlstein struct ksem_wait_args { 742efaa6588SAlfred Perlstein semid_t id; 743efaa6588SAlfred Perlstein }; 744efaa6588SAlfred Perlstein #endif 745efaa6588SAlfred Perlstein int 7468451d0ddSKip Macy sys_ksem_wait(struct thread *td, struct ksem_wait_args *uap) 747efaa6588SAlfred Perlstein { 748efaa6588SAlfred Perlstein 749aae94fbbSDaniel Eischen return (kern_sem_wait(td, uap->id, 0, NULL)); 750aae94fbbSDaniel Eischen } 751aae94fbbSDaniel Eischen 752aae94fbbSDaniel Eischen #ifndef _SYS_SYSPROTO_H_ 753aae94fbbSDaniel Eischen struct ksem_timedwait_args { 754aae94fbbSDaniel Eischen semid_t id; 755d60e86c8SStefan Farfeleder const struct timespec *abstime; 756aae94fbbSDaniel Eischen }; 757aae94fbbSDaniel Eischen #endif 758aae94fbbSDaniel Eischen int 7598451d0ddSKip Macy sys_ksem_timedwait(struct thread *td, struct ksem_timedwait_args *uap) 760aae94fbbSDaniel Eischen { 761aae94fbbSDaniel Eischen struct timespec abstime; 762aae94fbbSDaniel Eischen struct timespec *ts; 763aae94fbbSDaniel Eischen int error; 764aae94fbbSDaniel Eischen 7658e230e30SRobert Watson /* 7668e230e30SRobert Watson * We allow a null timespec (wait forever). 7678e230e30SRobert Watson */ 768aae94fbbSDaniel Eischen if (uap->abstime == NULL) 769aae94fbbSDaniel Eischen ts = NULL; 770aae94fbbSDaniel Eischen else { 771aae94fbbSDaniel Eischen error = copyin(uap->abstime, &abstime, sizeof(abstime)); 772aae94fbbSDaniel Eischen if (error != 0) 773aae94fbbSDaniel Eischen return (error); 774aae94fbbSDaniel Eischen if (abstime.tv_nsec >= 1000000000 || abstime.tv_nsec < 0) 775aae94fbbSDaniel Eischen return (EINVAL); 776aae94fbbSDaniel Eischen ts = &abstime; 777aae94fbbSDaniel Eischen } 778aae94fbbSDaniel Eischen return (kern_sem_wait(td, uap->id, 0, ts)); 779efaa6588SAlfred Perlstein } 780efaa6588SAlfred Perlstein 781efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 782efaa6588SAlfred Perlstein struct ksem_trywait_args { 783efaa6588SAlfred Perlstein semid_t id; 784efaa6588SAlfred Perlstein }; 785efaa6588SAlfred Perlstein #endif 786efaa6588SAlfred Perlstein int 7878451d0ddSKip Macy sys_ksem_trywait(struct thread *td, struct ksem_trywait_args *uap) 788efaa6588SAlfred Perlstein { 789efaa6588SAlfred Perlstein 790aae94fbbSDaniel Eischen return (kern_sem_wait(td, uap->id, 1, NULL)); 791efaa6588SAlfred Perlstein } 792efaa6588SAlfred Perlstein 793c3053131SPoul-Henning Kamp static int 794c1250af6SRobert Watson kern_sem_wait(struct thread *td, semid_t id, int tryflag, 795c1250af6SRobert Watson struct timespec *abstime) 796efaa6588SAlfred Perlstein { 797aae94fbbSDaniel Eischen struct timespec ts1, ts2; 798aae94fbbSDaniel Eischen struct timeval tv; 7997008be5bSPawel Jakub Dawidek cap_rights_t rights; 8006bc1e9cdSJohn Baldwin struct file *fp; 801efaa6588SAlfred Perlstein struct ksem *ks; 802efaa6588SAlfred Perlstein int error; 803efaa6588SAlfred Perlstein 804b2966a5aSBruce M Simpson DP((">>> kern_sem_wait entered! pid=%d\n", (int)td->td_proc->p_pid)); 8057008be5bSPawel Jakub Dawidek error = ksem_get(td, id, cap_rights_init(&rights, CAP_SEM_WAIT), &fp); 8066bc1e9cdSJohn Baldwin if (error) 8076bc1e9cdSJohn Baldwin return (error); 8086bc1e9cdSJohn Baldwin ks = fp->f_data; 809efaa6588SAlfred Perlstein mtx_lock(&sem_lock); 810b2966a5aSBruce M Simpson DP((">>> kern_sem_wait critical section entered! pid=%d\n", 811b2966a5aSBruce M Simpson (int)td->td_proc->p_pid)); 81252648411SRobert Watson #ifdef MAC 8136bc1e9cdSJohn Baldwin error = mac_posixsem_check_wait(td->td_ucred, fp->f_cred, ks); 81452648411SRobert Watson if (error) { 81552648411SRobert Watson DP(("kern_sem_wait mac failed\n")); 81652648411SRobert Watson goto err; 81752648411SRobert Watson } 81852648411SRobert Watson #endif 819c814aa3fSAlfred Perlstein DP(("kern_sem_wait value = %d, tryflag %d\n", ks->ks_value, tryflag)); 8206bc1e9cdSJohn Baldwin vfs_timestamp(&ks->ks_atime); 82177d8bf9cSBruce M Simpson while (ks->ks_value == 0) { 822efaa6588SAlfred Perlstein ks->ks_waiters++; 823aae94fbbSDaniel Eischen if (tryflag != 0) 824aae94fbbSDaniel Eischen error = EAGAIN; 825aae94fbbSDaniel Eischen else if (abstime == NULL) 826aae94fbbSDaniel Eischen error = cv_wait_sig(&ks->ks_cv, &sem_lock); 827aae94fbbSDaniel Eischen else { 828aae94fbbSDaniel Eischen for (;;) { 829aae94fbbSDaniel Eischen ts1 = *abstime; 830aae94fbbSDaniel Eischen getnanotime(&ts2); 831aae94fbbSDaniel Eischen timespecsub(&ts1, &ts2); 832aae94fbbSDaniel Eischen TIMESPEC_TO_TIMEVAL(&tv, &ts1); 833aae94fbbSDaniel Eischen if (tv.tv_sec < 0) { 834aae94fbbSDaniel Eischen error = ETIMEDOUT; 835aae94fbbSDaniel Eischen break; 836aae94fbbSDaniel Eischen } 837aae94fbbSDaniel Eischen error = cv_timedwait_sig(&ks->ks_cv, 838aae94fbbSDaniel Eischen &sem_lock, tvtohz(&tv)); 839aae94fbbSDaniel Eischen if (error != EWOULDBLOCK) 840aae94fbbSDaniel Eischen break; 841aae94fbbSDaniel Eischen } 842aae94fbbSDaniel Eischen } 843efaa6588SAlfred Perlstein ks->ks_waiters--; 844efaa6588SAlfred Perlstein if (error) 845efaa6588SAlfred Perlstein goto err; 846efaa6588SAlfred Perlstein } 847efaa6588SAlfred Perlstein ks->ks_value--; 848b2966a5aSBruce M Simpson DP(("kern_sem_wait value post-decrement = %d\n", ks->ks_value)); 849efaa6588SAlfred Perlstein error = 0; 850efaa6588SAlfred Perlstein err: 851efaa6588SAlfred Perlstein mtx_unlock(&sem_lock); 8526bc1e9cdSJohn Baldwin fdrop(fp, td); 853b2966a5aSBruce M Simpson DP(("<<< kern_sem_wait leaving, pid=%d, error = %d\n", 854b2966a5aSBruce M Simpson (int)td->td_proc->p_pid, error)); 855efaa6588SAlfred Perlstein return (error); 856efaa6588SAlfred Perlstein } 857efaa6588SAlfred Perlstein 858efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 859efaa6588SAlfred Perlstein struct ksem_getvalue_args { 860efaa6588SAlfred Perlstein semid_t id; 861efaa6588SAlfred Perlstein int *val; 862efaa6588SAlfred Perlstein }; 863efaa6588SAlfred Perlstein #endif 864efaa6588SAlfred Perlstein int 8658451d0ddSKip Macy sys_ksem_getvalue(struct thread *td, struct ksem_getvalue_args *uap) 866efaa6588SAlfred Perlstein { 8677008be5bSPawel Jakub Dawidek cap_rights_t rights; 8686bc1e9cdSJohn Baldwin struct file *fp; 869efaa6588SAlfred Perlstein struct ksem *ks; 870efaa6588SAlfred Perlstein int error, val; 871efaa6588SAlfred Perlstein 8727008be5bSPawel Jakub Dawidek error = ksem_get(td, uap->id, 8737008be5bSPawel Jakub Dawidek cap_rights_init(&rights, CAP_SEM_GETVALUE), &fp); 8746bc1e9cdSJohn Baldwin if (error) 8756bc1e9cdSJohn Baldwin return (error); 8766bc1e9cdSJohn Baldwin ks = fp->f_data; 8776bc1e9cdSJohn Baldwin 878efaa6588SAlfred Perlstein mtx_lock(&sem_lock); 87952648411SRobert Watson #ifdef MAC 8806bc1e9cdSJohn Baldwin error = mac_posixsem_check_getvalue(td->td_ucred, fp->f_cred, ks); 88152648411SRobert Watson if (error) { 88252648411SRobert Watson mtx_unlock(&sem_lock); 8836bc1e9cdSJohn Baldwin fdrop(fp, td); 88452648411SRobert Watson return (error); 88552648411SRobert Watson } 88652648411SRobert Watson #endif 887efaa6588SAlfred Perlstein val = ks->ks_value; 8886bc1e9cdSJohn Baldwin vfs_timestamp(&ks->ks_atime); 889efaa6588SAlfred Perlstein mtx_unlock(&sem_lock); 8906bc1e9cdSJohn Baldwin fdrop(fp, td); 891efaa6588SAlfred Perlstein error = copyout(&val, uap->val, sizeof(val)); 892efaa6588SAlfred Perlstein return (error); 893efaa6588SAlfred Perlstein } 894efaa6588SAlfred Perlstein 895efaa6588SAlfred Perlstein #ifndef _SYS_SYSPROTO_H_ 896efaa6588SAlfred Perlstein struct ksem_destroy_args { 897efaa6588SAlfred Perlstein semid_t id; 898efaa6588SAlfred Perlstein }; 899efaa6588SAlfred Perlstein #endif 900efaa6588SAlfred Perlstein int 9018451d0ddSKip Macy sys_ksem_destroy(struct thread *td, struct ksem_destroy_args *uap) 902efaa6588SAlfred Perlstein { 903ef88ae77SSergey Kandaurov cap_rights_t rights; 9046bc1e9cdSJohn Baldwin struct file *fp; 905efaa6588SAlfred Perlstein struct ksem *ks; 906efaa6588SAlfred Perlstein int error; 907efaa6588SAlfred Perlstein 908a9d2f8d8SRobert Watson /* No capability rights required to close a semaphore. */ 909ef88ae77SSergey Kandaurov error = ksem_get(td, uap->id, cap_rights_init(&rights), &fp); 9106bc1e9cdSJohn Baldwin if (error) 9116bc1e9cdSJohn Baldwin return (error); 9126bc1e9cdSJohn Baldwin ks = fp->f_data; 9136bc1e9cdSJohn Baldwin if (!(ks->ks_flags & KS_ANONYMOUS)) { 9146bc1e9cdSJohn Baldwin fdrop(fp, td); 9156bc1e9cdSJohn Baldwin return (EINVAL); 916efaa6588SAlfred Perlstein } 9176bc1e9cdSJohn Baldwin mtx_lock(&sem_lock); 918efaa6588SAlfred Perlstein if (ks->ks_waiters != 0) { 9196bc1e9cdSJohn Baldwin mtx_unlock(&sem_lock); 920efaa6588SAlfred Perlstein error = EBUSY; 921efaa6588SAlfred Perlstein goto err; 922efaa6588SAlfred Perlstein } 9236bc1e9cdSJohn Baldwin ks->ks_flags |= KS_DEAD; 924efaa6588SAlfred Perlstein mtx_unlock(&sem_lock); 9256bc1e9cdSJohn Baldwin 9266bc1e9cdSJohn Baldwin error = kern_close(td, uap->id); 9276bc1e9cdSJohn Baldwin err: 9286bc1e9cdSJohn Baldwin fdrop(fp, td); 929efaa6588SAlfred Perlstein return (error); 930efaa6588SAlfred Perlstein } 931efaa6588SAlfred Perlstein 9320e5d5bc2SKonstantin Belousov static struct syscall_helper_data ksem_syscalls[] = { 9330e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_init), 9340e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_open), 9350e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_unlink), 9360e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_close), 9370e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_post), 9380e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_wait), 9390e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_timedwait), 9400e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_trywait), 9410e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_getvalue), 9420e5d5bc2SKonstantin Belousov SYSCALL_INIT_HELPER(ksem_destroy), 9430e5d5bc2SKonstantin Belousov SYSCALL_INIT_LAST 9440e5d5bc2SKonstantin Belousov }; 9456bc1e9cdSJohn Baldwin 9460e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 9470e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32.h> 9480e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32_proto.h> 9490e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32_signal.h> 9500e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32_syscall.h> 9510e5d5bc2SKonstantin Belousov #include <compat/freebsd32/freebsd32_util.h> 9526bc1e9cdSJohn Baldwin 9530e5d5bc2SKonstantin Belousov int 9540e5d5bc2SKonstantin Belousov freebsd32_ksem_init(struct thread *td, struct freebsd32_ksem_init_args *uap) 9550e5d5bc2SKonstantin Belousov { 9566bc1e9cdSJohn Baldwin 9570e5d5bc2SKonstantin Belousov return (ksem_create(td, NULL, uap->idp, S_IRWXU | S_IRWXG, uap->value, 9580e5d5bc2SKonstantin Belousov 0, 1)); 9590e5d5bc2SKonstantin Belousov } 9600e5d5bc2SKonstantin Belousov 9610e5d5bc2SKonstantin Belousov int 9620e5d5bc2SKonstantin Belousov freebsd32_ksem_open(struct thread *td, struct freebsd32_ksem_open_args *uap) 9630e5d5bc2SKonstantin Belousov { 9640e5d5bc2SKonstantin Belousov 9650e5d5bc2SKonstantin Belousov if ((uap->oflag & ~(O_CREAT | O_EXCL)) != 0) 9660e5d5bc2SKonstantin Belousov return (EINVAL); 9670e5d5bc2SKonstantin Belousov return (ksem_create(td, uap->name, uap->idp, uap->mode, uap->value, 9680e5d5bc2SKonstantin Belousov uap->oflag, 1)); 9690e5d5bc2SKonstantin Belousov } 9700e5d5bc2SKonstantin Belousov 9710e5d5bc2SKonstantin Belousov int 9720e5d5bc2SKonstantin Belousov freebsd32_ksem_timedwait(struct thread *td, 9730e5d5bc2SKonstantin Belousov struct freebsd32_ksem_timedwait_args *uap) 9740e5d5bc2SKonstantin Belousov { 9750e5d5bc2SKonstantin Belousov struct timespec32 abstime32; 9760e5d5bc2SKonstantin Belousov struct timespec *ts, abstime; 9770e5d5bc2SKonstantin Belousov int error; 9780e5d5bc2SKonstantin Belousov 9790e5d5bc2SKonstantin Belousov /* 9800e5d5bc2SKonstantin Belousov * We allow a null timespec (wait forever). 9810e5d5bc2SKonstantin Belousov */ 9820e5d5bc2SKonstantin Belousov if (uap->abstime == NULL) 9830e5d5bc2SKonstantin Belousov ts = NULL; 9840e5d5bc2SKonstantin Belousov else { 9850e5d5bc2SKonstantin Belousov error = copyin(uap->abstime, &abstime32, sizeof(abstime32)); 9860e5d5bc2SKonstantin Belousov if (error != 0) 9870e5d5bc2SKonstantin Belousov return (error); 9880e5d5bc2SKonstantin Belousov CP(abstime32, abstime, tv_sec); 9890e5d5bc2SKonstantin Belousov CP(abstime32, abstime, tv_nsec); 9900e5d5bc2SKonstantin Belousov if (abstime.tv_nsec >= 1000000000 || abstime.tv_nsec < 0) 9910e5d5bc2SKonstantin Belousov return (EINVAL); 9920e5d5bc2SKonstantin Belousov ts = &abstime; 9930e5d5bc2SKonstantin Belousov } 9940e5d5bc2SKonstantin Belousov return (kern_sem_wait(td, uap->id, 0, ts)); 9950e5d5bc2SKonstantin Belousov } 9960e5d5bc2SKonstantin Belousov 9970e5d5bc2SKonstantin Belousov static struct syscall_helper_data ksem32_syscalls[] = { 9980e5d5bc2SKonstantin Belousov SYSCALL32_INIT_HELPER(freebsd32_ksem_init), 9990e5d5bc2SKonstantin Belousov SYSCALL32_INIT_HELPER(freebsd32_ksem_open), 10008451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_unlink), 10018451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_close), 10028451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_post), 10038451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_wait), 10040e5d5bc2SKonstantin Belousov SYSCALL32_INIT_HELPER(freebsd32_ksem_timedwait), 10058451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_trywait), 10068451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_getvalue), 10078451d0ddSKip Macy SYSCALL32_INIT_HELPER_COMPAT(ksem_destroy), 10080e5d5bc2SKonstantin Belousov SYSCALL_INIT_LAST 10090e5d5bc2SKonstantin Belousov }; 10100e5d5bc2SKonstantin Belousov #endif 10116bc1e9cdSJohn Baldwin 1012590f242cSRobert Watson static int 10136bc1e9cdSJohn Baldwin ksem_module_init(void) 1014590f242cSRobert Watson { 10156bc1e9cdSJohn Baldwin int error; 1016590f242cSRobert Watson 10176bc1e9cdSJohn Baldwin mtx_init(&sem_lock, "sem", NULL, MTX_DEF); 10186bc1e9cdSJohn Baldwin mtx_init(&ksem_count_lock, "ksem count", NULL, MTX_DEF); 10196bc1e9cdSJohn Baldwin sx_init(&ksem_dict_lock, "ksem dictionary"); 10206bc1e9cdSJohn Baldwin ksem_dictionary = hashinit(1024, M_KSEM, &ksem_hash); 10212e7758a8SJohn Baldwin p31b_setcfg(CTL_P1003_1B_SEMAPHORES, 200112L); 10226bc1e9cdSJohn Baldwin p31b_setcfg(CTL_P1003_1B_SEM_NSEMS_MAX, SEM_MAX); 10236bc1e9cdSJohn Baldwin p31b_setcfg(CTL_P1003_1B_SEM_VALUE_MAX, SEM_VALUE_MAX); 1024590f242cSRobert Watson 1025e015b1abSMateusz Guzik error = syscall_helper_register(ksem_syscalls, SY_THR_STATIC_KLD); 10260e5d5bc2SKonstantin Belousov if (error) 10270e5d5bc2SKonstantin Belousov return (error); 10280e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 1029e015b1abSMateusz Guzik error = syscall32_helper_register(ksem32_syscalls, SY_THR_STATIC_KLD); 10300e5d5bc2SKonstantin Belousov if (error) 10310e5d5bc2SKonstantin Belousov return (error); 10320e5d5bc2SKonstantin Belousov #endif 10336bc1e9cdSJohn Baldwin return (0); 1034590f242cSRobert Watson } 1035590f242cSRobert Watson 1036c3053131SPoul-Henning Kamp static void 10376bc1e9cdSJohn Baldwin ksem_module_destroy(void) 1038993182e5SAlexander Leidinger { 1039993182e5SAlexander Leidinger 10400e5d5bc2SKonstantin Belousov #ifdef COMPAT_FREEBSD32 10410e5d5bc2SKonstantin Belousov syscall32_helper_unregister(ksem32_syscalls); 10420e5d5bc2SKonstantin Belousov #endif 10430e5d5bc2SKonstantin Belousov syscall_helper_unregister(ksem_syscalls); 1044efaa6588SAlfred Perlstein 10452e7758a8SJohn Baldwin p31b_setcfg(CTL_P1003_1B_SEMAPHORES, 0); 10466bc1e9cdSJohn Baldwin hashdestroy(ksem_dictionary, M_KSEM, ksem_hash); 10476bc1e9cdSJohn Baldwin sx_destroy(&ksem_dict_lock); 10486bc1e9cdSJohn Baldwin mtx_destroy(&ksem_count_lock); 10496bc1e9cdSJohn Baldwin mtx_destroy(&sem_lock); 105032863754SKonstantin Belousov p31b_unsetcfg(CTL_P1003_1B_SEM_VALUE_MAX); 105132863754SKonstantin Belousov p31b_unsetcfg(CTL_P1003_1B_SEM_NSEMS_MAX); 1052efaa6588SAlfred Perlstein } 1053efaa6588SAlfred Perlstein 1054efaa6588SAlfred Perlstein static int 1055efaa6588SAlfred Perlstein sem_modload(struct module *module, int cmd, void *arg) 1056efaa6588SAlfred Perlstein { 1057efaa6588SAlfred Perlstein int error = 0; 1058efaa6588SAlfred Perlstein 1059efaa6588SAlfred Perlstein switch (cmd) { 1060efaa6588SAlfred Perlstein case MOD_LOAD: 10616bc1e9cdSJohn Baldwin error = ksem_module_init(); 10626bc1e9cdSJohn Baldwin if (error) 10636bc1e9cdSJohn Baldwin ksem_module_destroy(); 1064efaa6588SAlfred Perlstein break; 10658e230e30SRobert Watson 1066efaa6588SAlfred Perlstein case MOD_UNLOAD: 10676bc1e9cdSJohn Baldwin mtx_lock(&ksem_count_lock); 1068efaa6588SAlfred Perlstein if (nsems != 0) { 1069efaa6588SAlfred Perlstein error = EOPNOTSUPP; 10706bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 1071efaa6588SAlfred Perlstein break; 1072efaa6588SAlfred Perlstein } 10736bc1e9cdSJohn Baldwin ksem_dead = 1; 10746bc1e9cdSJohn Baldwin mtx_unlock(&ksem_count_lock); 10756bc1e9cdSJohn Baldwin ksem_module_destroy(); 1076efaa6588SAlfred Perlstein break; 10778e230e30SRobert Watson 1078efaa6588SAlfred Perlstein case MOD_SHUTDOWN: 1079efaa6588SAlfred Perlstein break; 1080efaa6588SAlfred Perlstein default: 1081efaa6588SAlfred Perlstein error = EINVAL; 1082efaa6588SAlfred Perlstein break; 1083efaa6588SAlfred Perlstein } 1084efaa6588SAlfred Perlstein return (error); 1085efaa6588SAlfred Perlstein } 1086efaa6588SAlfred Perlstein 1087efaa6588SAlfred Perlstein static moduledata_t sem_mod = { 1088efaa6588SAlfred Perlstein "sem", 1089efaa6588SAlfred Perlstein &sem_modload, 1090efaa6588SAlfred Perlstein NULL 1091efaa6588SAlfred Perlstein }; 1092efaa6588SAlfred Perlstein 1093efaa6588SAlfred Perlstein DECLARE_MODULE(sem, sem_mod, SI_SUB_SYSV_SEM, SI_ORDER_FIRST); 1094efaa6588SAlfred Perlstein MODULE_VERSION(sem, 1); 1095