1 /* $NetBSD: freebsd_sched.c,v 1.23 2021/09/07 11:43:03 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center; by Matthias Scheler. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * FreeBSD compatibility module. Try to deal with scheduler related syscalls. 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: freebsd_sched.c,v 1.23 2021/09/07 11:43:03 riastradh Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/mount.h> 42 #include <sys/proc.h> 43 #include <sys/systm.h> 44 #include <sys/syscallargs.h> 45 #include <sys/kauth.h> 46 47 #include <sys/cpu.h> 48 49 #include <compat/freebsd/freebsd_syscallargs.h> 50 #include <compat/freebsd/freebsd_sched.h> 51 52 int 53 freebsd_sys_yield(struct lwp *l, const void *v, register_t *retval) 54 { 55 56 yield(); 57 return 0; 58 } 59 60 /* 61 * XXX: Needs adjustment to do a proper conversion. 62 */ 63 static int 64 sched_freebsd2native(int freebsd_policy, 65 const struct freebsd_sched_param *freebsd_params, int *native_policy, 66 struct sched_param *native_params) 67 { 68 int p; 69 70 switch (freebsd_policy) { 71 case FREEBSD_SCHED_OTHER: 72 p = SCHED_OTHER; 73 break; 74 75 case FREEBSD_SCHED_FIFO: 76 p = SCHED_FIFO; 77 break; 78 79 case FREEBSD_SCHED_RR: 80 p = SCHED_RR; 81 break; 82 83 default: 84 return EINVAL; 85 } 86 87 if (native_policy != NULL) 88 *native_policy = p; 89 90 if (freebsd_params != NULL && native_params != NULL) { 91 /* XXX: Needs adjustment to do a proper conversion. */ 92 native_params->sched_priority = freebsd_params->sched_priority; 93 } 94 return 0; 95 } 96 97 static int 98 sched_native2freebsd(int native_policy, const struct sched_param *native_params, 99 int *freebsd_policy, struct freebsd_sched_param *freebsd_params) 100 { 101 int p; 102 103 switch (native_policy) { 104 case SCHED_OTHER: 105 p = FREEBSD_SCHED_OTHER; 106 break; 107 108 case SCHED_FIFO: 109 p = FREEBSD_SCHED_FIFO; 110 break; 111 112 case SCHED_RR: 113 p = FREEBSD_SCHED_RR; 114 break; 115 116 default: 117 return EINVAL; 118 } 119 120 if (freebsd_policy != NULL) 121 *freebsd_policy = p; 122 123 if (native_params != NULL && freebsd_params != NULL) { 124 /* XXX: Needs adjustment to do a proper conversion. */ 125 memset(freebsd_params, 0, sizeof(*freebsd_params)); 126 freebsd_params->sched_priority = native_params->sched_priority; 127 } 128 129 return 0; 130 } 131 132 int 133 freebsd_sys_sched_setparam(struct lwp *l, const struct freebsd_sys_sched_setparam_args *uap, register_t *retval) 134 { 135 /* { 136 syscallarg(pid_t) pid; 137 syscallarg(const struct freebsd_sched_param *) sp; 138 } */ 139 int error, policy; 140 struct freebsd_sched_param lp; 141 struct sched_param sp; 142 143 if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) { 144 error = EINVAL; 145 goto out; 146 } 147 148 error = copyin(SCARG(uap, sp), &lp, sizeof(lp)); 149 if (error) 150 goto out; 151 152 /* We need the current policy in FreeBSD terms. */ 153 error = do_sched_getparam(SCARG(uap, pid), 0, &policy, NULL); 154 if (error) 155 goto out; 156 error = sched_native2freebsd(policy, NULL, &policy, NULL); 157 if (error) 158 goto out; 159 160 error = sched_freebsd2native(policy, &lp, &policy, &sp); 161 if (error) 162 goto out; 163 164 error = do_sched_setparam(SCARG(uap, pid), 0, policy, &sp); 165 if (error) 166 goto out; 167 168 out: 169 return error; 170 } 171 172 int 173 freebsd_sys_sched_getparam(struct lwp *l, const struct freebsd_sys_sched_getparam_args *uap, register_t *retval) 174 { 175 /* { 176 syscallarg(pid_t) pid; 177 syscallarg(struct freebsd_sched_param *) sp; 178 } */ 179 struct freebsd_sched_param lp; 180 struct sched_param sp; 181 int error; 182 183 if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) { 184 error = EINVAL; 185 goto out; 186 } 187 188 error = do_sched_getparam(SCARG(uap, pid), 0, NULL, &sp); 189 if (error) 190 goto out; 191 192 error = sched_native2freebsd(0, &sp, NULL, &lp); 193 if (error) 194 goto out; 195 196 error = copyout(&lp, SCARG(uap, sp), sizeof(lp)); 197 if (error) 198 goto out; 199 200 out: 201 return error; 202 } 203 204 int 205 freebsd_sys_sched_setscheduler(struct lwp *l, const struct freebsd_sys_sched_setscheduler_args *uap, register_t *retval) 206 { 207 /* { 208 syscallarg(pid_t) pid; 209 syscallarg(int) policy; 210 syscallarg(cont struct freebsd_sched_scheduler *) sp; 211 } */ 212 int error, policy; 213 struct freebsd_sched_param lp; 214 struct sched_param sp; 215 216 if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL) { 217 error = EINVAL; 218 goto out; 219 } 220 221 error = copyin(SCARG(uap, sp), &lp, sizeof(lp)); 222 if (error) 223 goto out; 224 225 error = sched_freebsd2native(SCARG(uap, policy), &lp, &policy, &sp); 226 if (error) 227 goto out; 228 229 error = do_sched_setparam(SCARG(uap, pid), 0, policy, &sp); 230 if (error) 231 goto out; 232 233 out: 234 return error; 235 } 236 237 int 238 freebsd_sys_sched_getscheduler(struct lwp *l, const struct freebsd_sys_sched_getscheduler_args *uap, register_t *retval) 239 { 240 /* { 241 syscallarg(pid_t) pid; 242 } */ 243 int error, policy; 244 245 *retval = -1; 246 247 error = do_sched_getparam(SCARG(uap, pid), 0, &policy, NULL); 248 if (error) 249 goto out; 250 251 error = sched_native2freebsd(policy, NULL, &policy, NULL); 252 if (error) 253 goto out; 254 255 *retval = policy; 256 257 out: 258 return error; 259 } 260 261 int 262 freebsd_sys_sched_yield(struct lwp *l, const void *v, register_t *retval) 263 { 264 265 yield(); 266 return 0; 267 } 268 269 int 270 freebsd_sys_sched_get_priority_max(struct lwp *l, const struct freebsd_sys_sched_get_priority_max_args *uap, register_t *retval) 271 { 272 /* { 273 syscallarg(int) policy; 274 } */ 275 276 /* 277 * We can't emulate anything put the default scheduling policy. 278 */ 279 if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER) { 280 *retval = -1; 281 return EINVAL; 282 } 283 284 *retval = 0; 285 return 0; 286 } 287 288 int 289 freebsd_sys_sched_get_priority_min(struct lwp *l, const struct freebsd_sys_sched_get_priority_min_args *uap, register_t *retval) 290 { 291 /* { 292 syscallarg(int) policy; 293 } */ 294 295 /* 296 * We can't emulate anything put the default scheduling policy. 297 */ 298 if (SCARG(uap, policy) != FREEBSD_SCHED_OTHER) { 299 *retval = -1; 300 return EINVAL; 301 } 302 303 *retval = 0; 304 return 0; 305 } 306
Indexes created Sat Sep 20 22:09:52 GMT 2025