Annotation of sys/compat/linux/linux_sched.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: linux_sched.c,v 1.5 2004/11/23 19:08:52 miod Exp $ */
! 2: /* $NetBSD: linux_sched.c,v 1.6 2000/05/28 05:49:05 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1999 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center; by Matthias Scheler.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: /*
! 42: * Linux compatibility module. Try to deal with scheduler related syscalls.
! 43: */
! 44:
! 45: #include <sys/types.h>
! 46: #include <sys/param.h>
! 47: #include <sys/mount.h>
! 48: #include <sys/proc.h>
! 49: #include <sys/systm.h>
! 50: #include <sys/syscallargs.h>
! 51:
! 52: #include <machine/cpu.h>
! 53:
! 54: #include <compat/linux/linux_types.h>
! 55: #include <compat/linux/linux_sched.h>
! 56: #include <compat/linux/linux_signal.h>
! 57: #include <compat/linux/linux_syscallargs.h>
! 58:
! 59: int
! 60: linux_sys_clone(p, v, retval)
! 61: struct proc *p;
! 62: void *v;
! 63: register_t *retval;
! 64: {
! 65: struct linux_sys_clone_args /* {
! 66: syscallarg(int) flags;
! 67: syscallarg(void *) stack;
! 68: } */ *uap = v;
! 69: int flags = FORK_RFORK, sig;
! 70:
! 71: /*
! 72: * We don't support the Linux CLONE_PID or CLONE_PTRACE flags.
! 73: */
! 74: if (SCARG(uap, flags) & (LINUX_CLONE_PID | LINUX_CLONE_PTRACE))
! 75: return (EINVAL);
! 76:
! 77: if (SCARG(uap, flags) & LINUX_CLONE_VM)
! 78: flags |= FORK_SHAREVM;
! 79: /* XXX We pretend to support CLONE_FS for the moment. */
! 80: if (SCARG(uap, flags) & LINUX_CLONE_FILES)
! 81: flags |= FORK_SHAREFILES;
! 82: if (SCARG(uap, flags) & LINUX_CLONE_SIGHAND)
! 83: flags |= FORK_SIGHAND;
! 84: if (SCARG(uap, flags) & LINUX_CLONE_VFORK) {
! 85: flags |= FORK_PPWAIT;
! 86: }
! 87:
! 88: sig = SCARG(uap, flags) & LINUX_CLONE_CSIGNAL;
! 89: if (sig < 0 || sig >= LINUX__NSIG)
! 90: return (EINVAL);
! 91: sig = linux_to_bsd_sig[sig];
! 92:
! 93: /*
! 94: * Note that Linux does not provide a portable way of specifying
! 95: * the stack area; the caller must know if the stack grows up
! 96: * or down. So, we pass a stack size of 0, so that the code
! 97: * that makes this adjustment is a noop.
! 98: */
! 99: return (fork1(p, sig, flags, SCARG(uap, stack), 0, NULL, NULL, retval,
! 100: NULL));
! 101: }
! 102:
! 103: int
! 104: linux_sys_sched_setparam(cp, v, retval)
! 105: struct proc *cp;
! 106: void *v;
! 107: register_t *retval;
! 108: {
! 109: struct linux_sys_sched_setparam_args /* {
! 110: syscallarg(linux_pid_t) pid;
! 111: syscallarg(const struct linux_sched_param *) sp;
! 112: } */ *uap = v;
! 113: int error;
! 114: struct linux_sched_param lp;
! 115: struct proc *p;
! 116:
! 117: /*
! 118: * We only check for valid parameters and return afterwards.
! 119: */
! 120:
! 121: if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
! 122: return (EINVAL);
! 123:
! 124: error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
! 125: if (error)
! 126: return (error);
! 127:
! 128: if (SCARG(uap, pid) != 0) {
! 129: struct pcred *pc = cp->p_cred;
! 130:
! 131: if ((p = pfind(SCARG(uap, pid))) == NULL)
! 132: return (ESRCH);
! 133: if (!(cp == p ||
! 134: pc->pc_ucred->cr_uid == 0 ||
! 135: pc->p_ruid == p->p_cred->p_ruid ||
! 136: pc->pc_ucred->cr_uid == p->p_cred->p_ruid ||
! 137: pc->p_ruid == p->p_ucred->cr_uid ||
! 138: pc->pc_ucred->cr_uid == p->p_ucred->cr_uid))
! 139: return (EPERM);
! 140: }
! 141:
! 142: return (0);
! 143: }
! 144:
! 145: int
! 146: linux_sys_sched_getparam(cp, v, retval)
! 147: struct proc *cp;
! 148: void *v;
! 149: register_t *retval;
! 150: {
! 151: struct linux_sys_sched_getparam_args /* {
! 152: syscallarg(linux_pid_t) pid;
! 153: syscallarg(struct linux_sched_param *) sp;
! 154: } */ *uap = v;
! 155: struct proc *p;
! 156: struct linux_sched_param lp;
! 157:
! 158: /*
! 159: * We only check for valid parameters and return a dummy priority
! 160: * afterwards.
! 161: */
! 162: if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
! 163: return (EINVAL);
! 164:
! 165: if (SCARG(uap, pid) != 0) {
! 166: struct pcred *pc = cp->p_cred;
! 167:
! 168: if ((p = pfind(SCARG(uap, pid))) == NULL)
! 169: return (ESRCH);
! 170: if (!(cp == p ||
! 171: pc->pc_ucred->cr_uid == 0 ||
! 172: pc->p_ruid == p->p_cred->p_ruid ||
! 173: pc->pc_ucred->cr_uid == p->p_cred->p_ruid ||
! 174: pc->p_ruid == p->p_ucred->cr_uid ||
! 175: pc->pc_ucred->cr_uid == p->p_ucred->cr_uid))
! 176: return (EPERM);
! 177: }
! 178:
! 179: lp.sched_priority = 0;
! 180: return (copyout(&lp, SCARG(uap, sp), sizeof lp));
! 181: }
! 182:
! 183: int
! 184: linux_sys_sched_setscheduler(cp, v, retval)
! 185: struct proc *cp;
! 186: void *v;
! 187: register_t *retval;
! 188: {
! 189: struct linux_sys_sched_setscheduler_args /* {
! 190: syscallarg(linux_pid_t) pid;
! 191: syscallarg(int) policy;
! 192: syscallarg(cont struct linux_sched_scheduler *) sp;
! 193: } */ *uap = v;
! 194: int error;
! 195: struct linux_sched_param lp;
! 196: struct proc *p;
! 197:
! 198: /*
! 199: * We only check for valid parameters and return afterwards.
! 200: */
! 201:
! 202: if (SCARG(uap, pid) < 0 || SCARG(uap, sp) == NULL)
! 203: return (EINVAL);
! 204:
! 205: error = copyin(SCARG(uap, sp), &lp, sizeof(lp));
! 206: if (error)
! 207: return (error);
! 208:
! 209: if (SCARG(uap, pid) != 0) {
! 210: struct pcred *pc = cp->p_cred;
! 211:
! 212: if ((p = pfind(SCARG(uap, pid))) == NULL)
! 213: return (ESRCH);
! 214: if (!(cp == p ||
! 215: pc->pc_ucred->cr_uid == 0 ||
! 216: pc->p_ruid == p->p_cred->p_ruid ||
! 217: pc->pc_ucred->cr_uid == p->p_cred->p_ruid ||
! 218: pc->p_ruid == p->p_ucred->cr_uid ||
! 219: pc->pc_ucred->cr_uid == p->p_ucred->cr_uid))
! 220: return (EPERM);
! 221: }
! 222:
! 223: /*
! 224: * We can't emulate anything but the default scheduling policy.
! 225: */
! 226: if (SCARG(uap, policy) != LINUX_SCHED_OTHER || lp.sched_priority != 0)
! 227: return (EINVAL);
! 228:
! 229: return (0);
! 230: }
! 231:
! 232: int
! 233: linux_sys_sched_getscheduler(cp, v, retval)
! 234: struct proc *cp;
! 235: void *v;
! 236: register_t *retval;
! 237: {
! 238: struct linux_sys_sched_getscheduler_args /* {
! 239: syscallarg(linux_pid_t) pid;
! 240: } */ *uap = v;
! 241: struct proc *p;
! 242:
! 243: *retval = -1;
! 244:
! 245: /*
! 246: * We only check for valid parameters and return afterwards.
! 247: */
! 248:
! 249: if (SCARG(uap, pid) != 0) {
! 250: struct pcred *pc = cp->p_cred;
! 251:
! 252: if ((p = pfind(SCARG(uap, pid))) == NULL)
! 253: return (ESRCH);
! 254: if (!(cp == p ||
! 255: pc->pc_ucred->cr_uid == 0 ||
! 256: pc->p_ruid == p->p_cred->p_ruid ||
! 257: pc->pc_ucred->cr_uid == p->p_cred->p_ruid ||
! 258: pc->p_ruid == p->p_ucred->cr_uid ||
! 259: pc->pc_ucred->cr_uid == p->p_ucred->cr_uid))
! 260: return (EPERM);
! 261: }
! 262:
! 263: /*
! 264: * We can't emulate anything but the default scheduling policy.
! 265: */
! 266: *retval = LINUX_SCHED_OTHER;
! 267: return (0);
! 268: }
! 269:
! 270: int
! 271: linux_sys_sched_yield(cp, v, retval)
! 272: struct proc *cp;
! 273: void *v;
! 274: register_t *retval;
! 275: {
! 276: need_resched(curcpu());
! 277: return (0);
! 278: }
! 279:
! 280: int
! 281: linux_sys_sched_get_priority_max(cp, v, retval)
! 282: struct proc *cp;
! 283: void *v;
! 284: register_t *retval;
! 285: {
! 286: struct linux_sys_sched_get_priority_max_args /* {
! 287: syscallarg(int) policy;
! 288: } */ *uap = v;
! 289:
! 290: /*
! 291: * We can't emulate anything but the default scheduling policy.
! 292: */
! 293: if (SCARG(uap, policy) != LINUX_SCHED_OTHER) {
! 294: *retval = -1;
! 295: return (EINVAL);
! 296: }
! 297:
! 298: *retval = 0;
! 299: return (0);
! 300: }
! 301:
! 302: int
! 303: linux_sys_sched_get_priority_min(cp, v, retval)
! 304: struct proc *cp;
! 305: void *v;
! 306: register_t *retval;
! 307: {
! 308: struct linux_sys_sched_get_priority_min_args /* {
! 309: syscallarg(int) policy;
! 310: } */ *uap = v;
! 311:
! 312: /*
! 313: * We can't emulate anything but the default scheduling policy.
! 314: */
! 315: if (SCARG(uap, policy) != LINUX_SCHED_OTHER) {
! 316: *retval = -1;
! 317: return (EINVAL);
! 318: }
! 319:
! 320: *retval = 0;
! 321: return (0);
! 322: }
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