/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* Please see the License for the specific language governing rights and
* limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
/*-
*
* @(#)kern_resource.c 8.5 (Berkeley) 1/21/94
*/
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
+ */
#include <sys/param.h>
#include <sys/systm.h>
+#include <sys/sysctl.h>
#include <sys/kernel.h>
-#include <sys/file.h>
+#include <sys/file_internal.h>
#include <sys/resourcevar.h>
#include <sys/malloc.h>
-#include <sys/proc.h>
+#include <sys/proc_internal.h>
+#include <sys/kauth.h>
#include <machine/spl.h>
-#include <sys/mount.h>
+#include <sys/mount_internal.h>
+#include <sys/sysproto.h>
+
+#include <bsm/audit_kernel.h>
#include <machine/vmparam.h>
#include <mach/mach_types.h>
#include <mach/time_value.h>
+#include <mach/task.h>
#include <mach/task_info.h>
+#include <mach/vm_map.h>
+#include <mach/mach_vm.h>
+#include <mach/thread_act.h> /* for thread_policy_set( ) */
+#include <kern/lock.h>
+#include <kern/thread.h>
+
+#include <kern/task.h>
+#include <kern/clock.h> /* for absolutetime_to_microtime() */
+#include <netinet/in.h> /* for TRAFFIC_MGT_SO_BACKGROUND */
+#include <sys/socketvar.h> /* for struct socket */
#include <vm/vm_map.h>
-int donice __P((struct proc *curp, struct proc *chgp, int n));
-int dosetrlimit __P((struct proc *p, u_int which, struct rlimit *limp));
+int donice(struct proc *curp, struct proc *chgp, int n);
+int dosetrlimit(struct proc *p, u_int which, struct rlimit *limp);
+static int do_background_thread(struct proc *curp, int priority);
rlim_t maxdmap = MAXDSIZ; /* XXX */
-rlim_t maxsmap = MAXSSIZ; /* XXX */
+rlim_t maxsmap = MAXSSIZ - PAGE_SIZE; /* XXX */
/*
- * Resource controls and accounting.
+ * Limits on the number of open files per process, and the number
+ * of child processes per process.
+ *
+ * Note: would be in kern/subr_param.c in FreeBSD.
*/
-struct getpriority_args {
- int which;
- int who;
+int maxfilesperproc = OPEN_MAX; /* per-proc open files limit */
+
+SYSCTL_INT( _kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
+ &maxprocperuid, 0, "Maximum processes allowed per userid" );
+
+SYSCTL_INT( _kern, KERN_MAXFILESPERPROC, maxfilesperproc, CTLFLAG_RW,
+ &maxfilesperproc, 0, "Maximum files allowed open per process" );
+
+/* Args and fn for proc_iteration callback used in setpriority */
+struct puser_nice_args {
+ proc_t curp;
+ int prio;
+ id_t who;
+ int * foundp;
+ int * errorp;
+};
+static int puser_donice_callback(proc_t p, void * arg);
+
+
+/* Args and fn for proc_iteration callback used in setpriority */
+struct ppgrp_nice_args {
+ proc_t curp;
+ int prio;
+ int * foundp;
+ int * errorp;
};
+static int ppgrp_donice_callback(proc_t p, void * arg);
+
+/*
+ * Resource controls and accounting.
+ */
int
-getpriority(curp, uap, retval)
- struct proc *curp;
- register struct getpriority_args *uap;
- register_t *retval;
+getpriority(struct proc *curp, struct getpriority_args *uap, register_t *retval)
{
- register struct proc *p;
- register int low = PRIO_MAX + 1;
+ struct proc *p;
+ int low = PRIO_MAX + 1;
+ kauth_cred_t my_cred;
+
+ /* would also test (uap->who < 0), but id_t is unsigned */
+ if (uap->who > 0x7fffffff)
+ return (EINVAL);
switch (uap->which) {
case PRIO_PROCESS:
- if (uap->who == 0)
+ if (uap->who == 0) {
p = curp;
- else
- p = pfind(uap->who);
- if (p == 0)
- break;
- low = p->p_nice;
+ low = p->p_nice;
+ } else {
+ p = proc_find(uap->who);
+ if (p == 0)
+ break;
+ low = p->p_nice;
+ proc_rele(p);
+
+ }
break;
case PRIO_PGRP: {
- register struct pgrp *pg;
+ struct pgrp *pg = PGRP_NULL;
- if (uap->who == 0)
- pg = curp->p_pgrp;
- else if ((pg = pgfind(uap->who)) == NULL)
+ if (uap->who == 0) {
+ /* returns the pgrp to ref */
+ pg = proc_pgrp(curp);
+ } else if ((pg = pgfind(uap->who)) == PGRP_NULL) {
break;
+ }
+ /* No need for iteration as it is a simple scan */
+ pgrp_lock(pg);
for (p = pg->pg_members.lh_first; p != 0; p = p->p_pglist.le_next) {
if (p->p_nice < low)
low = p->p_nice;
}
+ pgrp_unlock(pg);
+ pg_rele(pg);
break;
}
case PRIO_USER:
if (uap->who == 0)
- uap->who = curp->p_ucred->cr_uid;
- for (p = allproc.lh_first; p != 0; p = p->p_list.le_next)
- if (p->p_ucred->cr_uid == uap->who &&
+ uap->who = kauth_cred_getuid(kauth_cred_get());
+
+ proc_list_lock();
+
+ for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) {
+ my_cred = kauth_cred_proc_ref(p);
+ if (kauth_cred_getuid(my_cred) == uap->who &&
p->p_nice < low)
low = p->p_nice;
+ kauth_cred_unref(&my_cred);
+ }
+
+ proc_list_unlock();
+
break;
+ case PRIO_DARWIN_THREAD: {
+ thread_t thread;
+ struct uthread *ut;
+
+ /* we currently only support the current thread */
+ if (uap->who != 0) {
+ return (EINVAL);
+ }
+
+ thread = current_thread();
+ ut = get_bsdthread_info(thread);
+
+ low = 0;
+ if ( (ut->uu_flag & UT_BACKGROUND) != 0 ) {
+ low = 1;
+ }
+ break;
+ }
+
default:
return (EINVAL);
}
return (0);
}
-struct setpriority_args {
- int which;
- int who;
- int prio;
-};
+/* call back function used for proc iteration in PRIO_USER */
+static int
+puser_donice_callback(proc_t p, void * arg)
+{
+ int error, n;
+ struct puser_nice_args * pun = (struct puser_nice_args *)arg;
+ kauth_cred_t my_cred;
+
+ my_cred = kauth_cred_proc_ref(p);
+ if (kauth_cred_getuid(my_cred) == pun->who) {
+ error = donice(pun->curp, p, pun->prio);
+ if (pun->errorp != NULL)
+ *pun->errorp = error;
+ if (pun->foundp != NULL) {
+ n = *pun->foundp;
+ *pun->foundp = n+1;
+ }
+ }
+ kauth_cred_unref(&my_cred);
+
+ return(PROC_RETURNED);
+}
+
+/* call back function used for proc iteration in PRIO_PGRP */
+static int
+ppgrp_donice_callback(proc_t p, void * arg)
+{
+ int error;
+ struct ppgrp_nice_args * pun = (struct ppgrp_nice_args *)arg;
+ int n;
+
+ error = donice(pun->curp, p, pun->prio);
+ if (pun->errorp != NULL)
+ *pun->errorp = error;
+ if (pun->foundp!= NULL) {
+ n = *pun->foundp;
+ *pun->foundp = n+1;
+ }
+
+ return(PROC_RETURNED);
+}
+
+/*
+ * Returns: 0 Success
+ * EINVAL
+ * ESRCH
+ * donice:EPERM
+ * donice:EACCES
+ */
/* ARGSUSED */
int
-setpriority(curp, uap, retval)
- struct proc *curp;
- register struct setpriority_args *uap;
- register_t *retval;
+setpriority(struct proc *curp, struct setpriority_args *uap, __unused register_t *retval)
{
- register struct proc *p;
+ struct proc *p;
int found = 0, error = 0;
+ int refheld = 0;
+
+ AUDIT_ARG(cmd, uap->which);
+ AUDIT_ARG(owner, uap->who, 0);
+ AUDIT_ARG(value, uap->prio);
+
+ /* would also test (uap->who < 0), but id_t is unsigned */
+ if (uap->who > 0x7fffffff)
+ return (EINVAL);
switch (uap->which) {
case PRIO_PROCESS:
if (uap->who == 0)
p = curp;
- else
- p = pfind(uap->who);
- if (p == 0)
- break;
+ else {
+ p = proc_find(uap->who);
+ if (p == 0)
+ break;
+ refheld = 1;
+ }
error = donice(curp, p, uap->prio);
found++;
+ if (refheld != 0)
+ proc_rele(p);
break;
case PRIO_PGRP: {
- register struct pgrp *pg;
+ struct pgrp *pg = PGRP_NULL;
+ struct ppgrp_nice_args ppgrp;
- if (uap->who == 0)
- pg = curp->p_pgrp;
- else if ((pg = pgfind(uap->who)) == NULL)
+ if (uap->who == 0) {
+ pg = proc_pgrp(curp);
+ } else if ((pg = pgfind(uap->who)) == PGRP_NULL)
break;
- for (p = pg->pg_members.lh_first; p != 0;
- p = p->p_pglist.le_next) {
- error = donice(curp, p, uap->prio);
- found++;
- }
+
+ ppgrp.curp = curp;
+ ppgrp.prio = uap->prio;
+ ppgrp.foundp = &found;
+ ppgrp.errorp = &error;
+
+ /* PGRP_DROPREF drops the reference on process group */
+ pgrp_iterate(pg, PGRP_DROPREF, ppgrp_donice_callback, (void *)&ppgrp, NULL, NULL);
+
break;
}
- case PRIO_USER:
+ case PRIO_USER: {
+ struct puser_nice_args punice;
+
if (uap->who == 0)
- uap->who = curp->p_ucred->cr_uid;
- for (p = allproc.lh_first; p != 0; p = p->p_list.le_next)
- if (p->p_ucred->cr_uid == uap->who) {
- error = donice(curp, p, uap->prio);
- found++;
- }
+ uap->who = kauth_cred_getuid(kauth_cred_get());
+
+ punice.curp = curp;
+ punice.prio = uap->prio;
+ punice.who = uap->who;
+ punice.foundp = &found;
+ error = 0;
+ punice.errorp = &error;
+ proc_iterate(PROC_ALLPROCLIST, puser_donice_callback, (void *)&punice, NULL, NULL);
+
break;
+ }
+
+ case PRIO_DARWIN_THREAD: {
+ /* we currently only support the current thread */
+ if (uap->who != 0) {
+ return (EINVAL);
+ }
+ error = do_background_thread(curp, uap->prio);
+ found++;
+ break;
+ }
default:
return (EINVAL);
return (error);
}
+
+/*
+ * Returns: 0 Success
+ * EPERM
+ * EACCES
+ * mac_check_proc_sched:???
+ */
int
-donice(curp, chgp, n)
- register struct proc *curp, *chgp;
- register int n;
+donice(struct proc *curp, struct proc *chgp, int n)
{
- register struct pcred *pcred = curp->p_cred;
+ int error = 0;
+ kauth_cred_t ucred;
+ kauth_cred_t my_cred;
- if (pcred->pc_ucred->cr_uid && pcred->p_ruid &&
- pcred->pc_ucred->cr_uid != chgp->p_ucred->cr_uid &&
- pcred->p_ruid != chgp->p_ucred->cr_uid)
- return (EPERM);
+ ucred = kauth_cred_proc_ref(curp);
+ my_cred = kauth_cred_proc_ref(chgp);
+
+ if (suser(ucred, NULL) && ucred->cr_ruid &&
+ kauth_cred_getuid(ucred) != kauth_cred_getuid(my_cred) &&
+ ucred->cr_ruid != kauth_cred_getuid(my_cred)) {
+ error = EPERM;
+ goto out;
+ }
if (n > PRIO_MAX)
n = PRIO_MAX;
if (n < PRIO_MIN)
n = PRIO_MIN;
- if (n < chgp->p_nice && suser(pcred->pc_ucred, &curp->p_acflag))
- return (EACCES);
+ if (n < chgp->p_nice && suser(ucred, &curp->p_acflag)) {
+ error = EACCES;
+ goto out;
+ }
+#if CONFIG_MACF
+ error = mac_proc_check_sched(curp, chgp);
+ if (error)
+ goto out;
+#endif
+ proc_lock(chgp);
chgp->p_nice = n;
+ proc_unlock(chgp);
(void)resetpriority(chgp);
- return (0);
+out:
+ kauth_cred_unref(&ucred);
+ kauth_cred_unref(&my_cred);
+ return (error);
}
-#if COMPAT_43
-struct osetrlimit_args {
- u_int which;
- struct ogetrlimit * rlp;
-};
-/* ARGSUSED */
-int
-osetrlimit(p, uap, retval)
- struct proc *p;
- struct osetrlimit_args *uap;
- register_t *retval;
+/*
+ * do_background_thread
+ * Returns: 0 Success
+ * XXX - todo - does this need a MACF hook?
+ */
+static int
+do_background_thread(struct proc *curp, int priority)
{
- struct orlimit olim;
- struct rlimit lim;
- int error;
+ int i;
+ thread_t thread;
+ struct uthread *ut;
+ thread_precedence_policy_data_t policy;
+ struct filedesc *fdp;
+ struct fileproc *fp;
+
+ thread = current_thread();
+ ut = get_bsdthread_info(thread);
- if (error = copyin((caddr_t)uap->rlp, (caddr_t)&olim,
- sizeof (struct orlimit)))
- return (error);
- lim.rlim_cur = olim.rlim_cur;
- lim.rlim_max = olim.rlim_max;
- return (dosetrlimit(p, uap->which, &lim));
-}
+ if ( (priority & PRIO_DARWIN_BG) == 0 ) {
+ /* turn off backgrounding of thread */
+ if ( (ut->uu_flag & UT_BACKGROUND) == 0 ) {
+ /* already off */
+ return(0);
+ }
-struct ogetrlimit_args {
- u_int which;
- struct ogetrlimit * rlp;
-};
-/* ARGSUSED */
-int
-ogetrlimit(p, uap, retval)
- struct proc *p;
- struct ogetrlimit_args *uap;
- register_t *retval;
-{
- struct orlimit olim;
+ /* clear background bit in thread and disable disk IO throttle */
+ ut->uu_flag &= ~UT_BACKGROUND;
+ ut->uu_iopol_disk = IOPOL_NORMAL;
- if (uap->which >= RLIM_NLIMITS)
- return (EINVAL);
- olim.rlim_cur = p->p_rlimit[uap->which].rlim_cur;
- if (olim.rlim_cur == -1)
- olim.rlim_cur = 0x7fffffff;
- olim.rlim_max = p->p_rlimit[uap->which].rlim_max;
- if (olim.rlim_max == -1)
- olim.rlim_max = 0x7fffffff;
- return (copyout((caddr_t)&olim, (caddr_t)uap->rlp,
- sizeof(olim)));
+ /* reset thread priority (we did not save previous value) */
+ policy.importance = 0;
+ thread_policy_set( thread, THREAD_PRECEDENCE_POLICY,
+ (thread_policy_t)&policy,
+ THREAD_PRECEDENCE_POLICY_COUNT );
+
+ /* disable networking IO throttle.
+ * NOTE - It is a known limitation of the current design that we
+ * could potentially clear TRAFFIC_MGT_SO_BACKGROUND bit for
+ * sockets created by other threads within this process.
+ */
+ proc_fdlock(curp);
+ fdp = curp->p_fd;
+ for ( i = 0; i < fdp->fd_nfiles; i++ ) {
+ struct socket *sockp;
+
+ fp = fdp->fd_ofiles[ i ];
+ if ( fp == NULL || (fdp->fd_ofileflags[ i ] & UF_RESERVED) != 0 ||
+ fp->f_fglob->fg_type != DTYPE_SOCKET ) {
+ continue;
+ }
+ sockp = (struct socket *)fp->f_fglob->fg_data;
+ if ( sockp->so_background_thread != thread ) {
+ continue;
+ }
+ sockp->so_traffic_mgt_flags &= ~TRAFFIC_MGT_SO_BACKGROUND;
+ sockp->so_background_thread = NULL;
+ }
+ proc_fdunlock(curp);
+
+ return(0);
+ }
+
+ /* background this thread */
+ if ( (ut->uu_flag & UT_BACKGROUND) != 0 ) {
+ /* already backgrounded */
+ return(0);
+ }
+
+ /* tag thread as background and throttle disk IO */
+ ut->uu_flag |= UT_BACKGROUND;
+ ut->uu_iopol_disk = IOPOL_THROTTLE;
+
+ policy.importance = INT_MIN;
+ thread_policy_set( thread, THREAD_PRECEDENCE_POLICY,
+ (thread_policy_t)&policy,
+ THREAD_PRECEDENCE_POLICY_COUNT );
+
+ /* throttle networking IO happens in socket( ) syscall.
+ * If UT_BACKGROUND is set in the current thread then
+ * TRAFFIC_MGT_SO_BACKGROUND socket option is set.
+ */
+ return(0);
}
-#endif /* COMPAT_43 */
-struct setrlimit_args {
- u_int which;
- struct rlimit * rlp;
-};
+
+/*
+ * Returns: 0 Success
+ * copyin:EFAULT
+ * dosetrlimit:
+ */
/* ARGSUSED */
int
-setrlimit(p, uap, retval)
- struct proc *p;
- register struct setrlimit_args *uap;
- register_t *retval;
+setrlimit(struct proc *p, struct setrlimit_args *uap, __unused register_t *retval)
{
struct rlimit alim;
int error;
- if (error = copyin((caddr_t)uap->rlp, (caddr_t)&alim,
- sizeof (struct rlimit)))
+ if ((error = copyin(uap->rlp, (caddr_t)&alim,
+ sizeof (struct rlimit))))
return (error);
+
return (dosetrlimit(p, uap->which, &alim));
}
+/*
+ * Returns: 0 Success
+ * EINVAL
+ * ENOMEM Cannot copy limit structure
+ * suser:EPERM
+ *
+ * Notes: EINVAL is returned both for invalid arguments, and in the
+ * case that the current usage (e.g. RLIMIT_STACK) is already
+ * in excess of the requested limit.
+ */
int
-dosetrlimit(p, which, limp)
- struct proc *p;
- u_int which;
- struct rlimit *limp;
+dosetrlimit(struct proc *p, u_int which, struct rlimit *limp)
{
- register struct rlimit *alimp;
- extern rlim_t maxdmap, maxsmap;
+ struct rlimit *alimp;
int error;
+ kern_return_t kr;
+ int posix = (which & _RLIMIT_POSIX_FLAG) ? 1 : 0;
+
+ /* Mask out POSIX flag, saved above */
+ which &= ~_RLIMIT_POSIX_FLAG;
if (which >= RLIM_NLIMITS)
return (EINVAL);
+
alimp = &p->p_rlimit[which];
+ if (limp->rlim_cur > limp->rlim_max)
+ return EINVAL;
+
if (limp->rlim_cur > alimp->rlim_max ||
limp->rlim_max > alimp->rlim_max)
- if (error = suser(p->p_ucred, &p->p_acflag))
+ if ((error = suser(kauth_cred_get(), &p->p_acflag))) {
return (error);
- if (limp->rlim_cur > limp->rlim_max)
- limp->rlim_cur = limp->rlim_max;
- if (p->p_limit->p_refcnt > 1 &&
- (p->p_limit->p_lflags & PL_SHAREMOD) == 0) {
- p->p_limit->p_refcnt--;
- p->p_limit = limcopy(p->p_limit);
- alimp = &p->p_rlimit[which];
}
+ proc_limitblock(p);
+
+ if ((error = proc_limitreplace(p)) != 0) {
+ proc_limitunblock(p);
+ return(error);
+ }
+
+ alimp = &p->p_rlimit[which];
+
switch (which) {
+ case RLIMIT_CPU:
+ if (limp->rlim_cur == RLIM_INFINITY) {
+ task_vtimer_clear(p->task, TASK_VTIMER_RLIM);
+ timerclear(&p->p_rlim_cpu);
+ }
+ else {
+ task_absolutetime_info_data_t tinfo;
+ mach_msg_type_number_t count;
+ struct timeval ttv, tv;
+
+ count = TASK_ABSOLUTETIME_INFO_COUNT;
+ task_info(p->task, TASK_ABSOLUTETIME_INFO,
+ (task_info_t)&tinfo, &count);
+ absolutetime_to_microtime(tinfo.total_user + tinfo.total_system,
+ (uint32_t *) &ttv.tv_sec, (uint32_t *) &ttv.tv_usec);
+
+ tv.tv_sec = (limp->rlim_cur > __INT_MAX__ ? __INT_MAX__ : limp->rlim_cur);
+ tv.tv_usec = 0;
+ timersub(&tv, &ttv, &p->p_rlim_cpu);
+
+ timerclear(&tv);
+ if (timercmp(&p->p_rlim_cpu, &tv, >))
+ task_vtimer_set(p->task, TASK_VTIMER_RLIM);
+ else {
+ task_vtimer_clear(p->task, TASK_VTIMER_RLIM);
+
+ timerclear(&p->p_rlim_cpu);
+
+ psignal(p, SIGXCPU);
+ }
+ }
+ break;
+
case RLIMIT_DATA:
if (limp->rlim_cur > maxdmap)
limp->rlim_cur = maxdmap;
break;
case RLIMIT_STACK:
- if (limp->rlim_cur > maxsmap)
- limp->rlim_cur = maxsmap;
- if (limp->rlim_max > maxsmap)
- limp->rlim_max = maxsmap;
+ /* Disallow illegal stack size instead of clipping */
+ if (limp->rlim_cur > maxsmap ||
+ limp->rlim_max > maxsmap) {
+ if (posix) {
+ error = EINVAL;
+ goto out;
+ }
+ else {
+ /*
+ * 4797860 - workaround poorly written installers by
+ * doing previous implementation (< 10.5) when caller
+ * is non-POSIX conforming.
+ */
+ if (limp->rlim_cur > maxsmap)
+ limp->rlim_cur = maxsmap;
+ if (limp->rlim_max > maxsmap)
+ limp->rlim_max = maxsmap;
+ }
+ }
+
/*
* Stack is allocated to the max at exec time with only
* "rlim_cur" bytes accessible. If stack limit is going
* up make more accessible, if going down make inaccessible.
*/
- if (limp->rlim_cur != alimp->rlim_cur) {
- vm_offset_t addr;
- vm_size_t size;
- vm_prot_t prot;
+ if (limp->rlim_cur > alimp->rlim_cur) {
+ user_addr_t addr;
+ user_size_t size;
- if (limp->rlim_cur > alimp->rlim_cur) {
/* grow stack */
- size = round_page(limp->rlim_cur);
- size -= round_page(alimp->rlim_cur);
+ size = round_page_64(limp->rlim_cur);
+ size -= round_page_64(alimp->rlim_cur);
#if STACK_GROWTH_UP
/* go to top of current stack */
- addr = trunc_page(p->user_stack + alimp->rlim_cur);
-#else STACK_GROWTH_UP
- addr = trunc_page(p->user_stack - alimp->rlim_cur);
- addr -= size;
+ addr = p->user_stack + round_page_64(alimp->rlim_cur);
+#else /* STACK_GROWTH_UP */
+ addr = p->user_stack - round_page_64(limp->rlim_cur);
#endif /* STACK_GROWTH_UP */
- if (vm_allocate(current_map(),
- &addr, size, FALSE) != KERN_SUCCESS)
- return(EINVAL);
- } else {
+ kr = mach_vm_protect(current_map(),
+ addr, size,
+ FALSE, VM_PROT_DEFAULT);
+ if (kr != KERN_SUCCESS) {
+ error = EINVAL;
+ goto out;
+ }
+ } else if (limp->rlim_cur < alimp->rlim_cur) {
+ user_addr_t addr;
+ user_size_t size;
+ user_addr_t cur_sp;
+
/* shrink stack */
+
+ /*
+ * First check if new stack limit would agree
+ * with current stack usage.
+ * Get the current thread's stack pointer...
+ */
+ cur_sp = thread_adjuserstack(current_thread(),
+ 0);
+#if STACK_GROWTH_UP
+ if (cur_sp >= p->user_stack &&
+ cur_sp < (p->user_stack +
+ round_page_64(alimp->rlim_cur))) {
+ /* current stack pointer is in main stack */
+ if (cur_sp >= (p->user_stack +
+ round_page_64(limp->rlim_cur))) {
+ /*
+ * New limit would cause
+ * current usage to be invalid:
+ * reject new limit.
+ */
+ error = EINVAL;
+ goto out;
+ }
+ } else {
+ /* not on the main stack: reject */
+ error = EINVAL;
+ goto out;
+ }
+
+#else /* STACK_GROWTH_UP */
+ if (cur_sp <= p->user_stack &&
+ cur_sp > (p->user_stack -
+ round_page_64(alimp->rlim_cur))) {
+ /* stack pointer is in main stack */
+ if (cur_sp <= (p->user_stack -
+ round_page_64(limp->rlim_cur))) {
+ /*
+ * New limit would cause
+ * current usage to be invalid:
+ * reject new limit.
+ */
+ error = EINVAL;
+ goto out;
+ }
+ } else {
+ /* not on the main stack: reject */
+ error = EINVAL;
+ goto out;
+ }
+#endif /* STACK_GROWTH_UP */
+
+ size = round_page_64(alimp->rlim_cur);
+ size -= round_page_64(limp->rlim_cur);
+
+#if STACK_GROWTH_UP
+ addr = p->user_stack + round_page_64(limp->rlim_cur);
+#else /* STACK_GROWTH_UP */
+ addr = p->user_stack - round_page_64(alimp->rlim_cur);
+#endif /* STACK_GROWTH_UP */
+
+ kr = mach_vm_protect(current_map(),
+ addr, size,
+ FALSE, VM_PROT_NONE);
+ if (kr != KERN_SUCCESS) {
+ error = EINVAL;
+ goto out;
}
+ } else {
+ /* no change ... */
}
break;
case RLIMIT_NOFILE:
- /*
- * Only root can get the maxfiles limits, as it is systemwide resource
- */
- if (is_suser()) {
- if (limp->rlim_cur > maxfiles)
+ /*
+ * Only root can set the maxfiles limits, as it is
+ * systemwide resource. If we are expecting POSIX behavior,
+ * instead of clamping the value, return EINVAL. We do this
+ * because historically, people have been able to attempt to
+ * set RLIM_INFINITY to get "whatever the maximum is".
+ */
+ if ( is_suser() ) {
+ if (limp->rlim_cur != alimp->rlim_cur &&
+ limp->rlim_cur > (rlim_t)maxfiles) {
+ if (posix) {
+ error = EINVAL;
+ goto out;
+ }
limp->rlim_cur = maxfiles;
- if (limp->rlim_max > maxfiles)
+ }
+ if (limp->rlim_max != alimp->rlim_max &&
+ limp->rlim_max > (rlim_t)maxfiles)
limp->rlim_max = maxfiles;
- } else {
- if (limp->rlim_cur > OPEN_MAX)
- limp->rlim_cur = OPEN_MAX;
- if (limp->rlim_max > OPEN_MAX)
- limp->rlim_max = OPEN_MAX;
+ }
+ else {
+ if (limp->rlim_cur != alimp->rlim_cur &&
+ limp->rlim_cur > (rlim_t)maxfilesperproc) {
+ if (posix) {
+ error = EINVAL;
+ goto out;
+ }
+ limp->rlim_cur = maxfilesperproc;
+ }
+ if (limp->rlim_max != alimp->rlim_max &&
+ limp->rlim_max > (rlim_t)maxfilesperproc)
+ limp->rlim_max = maxfilesperproc;
}
break;
case RLIMIT_NPROC:
- /*
- * Only root can get the maxproc limits, as it is systemwide resource
- */
- if (is_suser()) {
- if (limp->rlim_cur > maxproc)
+ /*
+ * Only root can set to the maxproc limits, as it is
+ * systemwide resource; all others are limited to
+ * maxprocperuid (presumably less than maxproc).
+ */
+ if ( is_suser() ) {
+ if (limp->rlim_cur > (rlim_t)maxproc)
limp->rlim_cur = maxproc;
- if (limp->rlim_max > maxproc)
+ if (limp->rlim_max > (rlim_t)maxproc)
limp->rlim_max = maxproc;
- } else {
- if (limp->rlim_cur > CHILD_MAX)
- limp->rlim_cur = CHILD_MAX;
- if (limp->rlim_max > CHILD_MAX)
- limp->rlim_max = CHILD_MAX;
+ }
+ else {
+ if (limp->rlim_cur > (rlim_t)maxprocperuid)
+ limp->rlim_cur = maxprocperuid;
+ if (limp->rlim_max > (rlim_t)maxprocperuid)
+ limp->rlim_max = maxprocperuid;
}
break;
- }
+
+ case RLIMIT_MEMLOCK:
+ /*
+ * Tell the Mach VM layer about the new limit value.
+ */
+
+ vm_map_set_user_wire_limit(current_map(), limp->rlim_cur);
+ break;
+
+ } /* switch... */
+ proc_lock(p);
*alimp = *limp;
- return (0);
+ proc_unlock(p);
+ error = 0;
+out:
+ proc_limitunblock(p);
+ return (error);
}
-struct getrlimit_args {
- u_int which;
- struct rlimit * rlp;
-};
/* ARGSUSED */
int
-getrlimit(p, uap, retval)
- struct proc *p;
- register struct getrlimit_args *uap;
- register_t *retval;
+getrlimit(struct proc *p, struct getrlimit_args *uap, __unused register_t *retval)
{
+ struct rlimit lim;
+
+ /*
+ * Take out flag now in case we need to use it to trigger variant
+ * behaviour later.
+ */
+ uap->which &= ~_RLIMIT_POSIX_FLAG;
if (uap->which >= RLIM_NLIMITS)
return (EINVAL);
- return (copyout((caddr_t)&p->p_rlimit[uap->which],
- (caddr_t)uap->rlp, sizeof (struct rlimit)));
+ proc_limitget(p, uap->which, &lim);
+ return (copyout((caddr_t)&lim,
+ uap->rlp, sizeof (struct rlimit)));
}
/*
* Transform the running time and tick information in proc p into user,
* system, and interrupt time usage.
*/
+/* No lock on proc is held for this.. */
void
-calcru(p, up, sp, ip)
- register struct proc *p;
- register struct timeval *up;
- register struct timeval *sp;
- register struct timeval *ip;
+calcru(struct proc *p, struct timeval *up, struct timeval *sp, struct timeval *ip)
{
task_t task;
if (task) {
task_basic_info_data_t tinfo;
task_thread_times_info_data_t ttimesinfo;
- int task_info_stuff, task_ttimes_stuff;
+ mach_msg_type_number_t task_info_stuff, task_ttimes_stuff;
struct timeval ut,st;
task_info_stuff = TASK_BASIC_INFO_COUNT;
task_info(task, TASK_BASIC_INFO,
- &tinfo, &task_info_stuff);
+ (task_info_t)&tinfo, &task_info_stuff);
ut.tv_sec = tinfo.user_time.seconds;
ut.tv_usec = tinfo.user_time.microseconds;
st.tv_sec = tinfo.system_time.seconds;
st.tv_usec = tinfo.system_time.microseconds;
- timeradd(&ut,up,up);
- timeradd(&st,up,up);
+ timeradd(&ut, up, up);
+ timeradd(&st, sp, sp);
task_ttimes_stuff = TASK_THREAD_TIMES_INFO_COUNT;
task_info(task, TASK_THREAD_TIMES_INFO,
- &ttimesinfo, &task_ttimes_stuff);
+ (task_info_t)&ttimesinfo, &task_ttimes_stuff);
ut.tv_sec = ttimesinfo.user_time.seconds;
ut.tv_usec = ttimesinfo.user_time.microseconds;
st.tv_sec = ttimesinfo.system_time.seconds;
st.tv_usec = ttimesinfo.system_time.microseconds;
- timeradd(&ut,up,up);
- timeradd(&st,up,up);
+ timeradd(&ut, up, up);
+ timeradd(&st, sp, sp);
}
}
-struct getrusage_args {
- int who;
- struct rusage * rusage;
-};
+__private_extern__ void munge_rusage(struct rusage *a_rusage_p, struct user_rusage *a_user_rusage_p);
+
/* ARGSUSED */
int
-getrusage(p, uap, retval)
- register struct proc *p;
- register struct getrusage_args *uap;
- register_t *retval;
+getrusage(struct proc *p, struct getrusage_args *uap, __unused register_t *retval)
{
struct rusage *rup, rubuf;
+ struct user_rusage rubuf64;
+ size_t retsize = sizeof(rubuf); /* default: 32 bits */
+ caddr_t retbuf = (caddr_t)&rubuf; /* default: 32 bits */
+ struct timeval utime;
+ struct timeval stime;
- switch (uap->who) {
+ switch (uap->who) {
case RUSAGE_SELF:
+ calcru(p, &utime, &stime, NULL);
+ // LP64todo: proc struct should have 64 bit version of struct
+ proc_lock(p);
rup = &p->p_stats->p_ru;
- calcru(p, &rup->ru_utime, &rup->ru_stime, NULL);
+ rup->ru_utime = utime;
+ rup->ru_stime = stime;
+
rubuf = *rup;
+ proc_unlock(p);
+
break;
case RUSAGE_CHILDREN:
+ proc_lock(p);
rup = &p->p_stats->p_cru;
rubuf = *rup;
+ proc_unlock(p);
break;
default:
return (EINVAL);
}
- return (copyout((caddr_t)&rubuf, (caddr_t)uap->rusage,
- sizeof (struct rusage)));
+ if (IS_64BIT_PROCESS(p)) {
+ retsize = sizeof(rubuf64);
+ retbuf = (caddr_t)&rubuf64;
+ munge_rusage(&rubuf, &rubuf64);
+ }
+ return (copyout(retbuf, uap->rusage, retsize));
}
void
-ruadd(ru, ru2)
- register struct rusage *ru, *ru2;
+ruadd(struct rusage *ru, struct rusage *ru2)
{
- register long *ip, *ip2;
- register int i;
+ long *ip, *ip2;
+ int i;
timeradd(&ru->ru_utime, &ru2->ru_utime, &ru->ru_utime);
timeradd(&ru->ru_stime, &ru2->ru_stime, &ru->ru_stime);
*ip++ += *ip2++;
}
-/*
- * Make a copy of the plimit structure.
- * We share these structures copy-on-write after fork,
- * and copy when a limit is changed.
- */
-struct plimit *
-limcopy(lim)
- struct plimit *lim;
+void
+proc_limitget(proc_t p, int which, struct rlimit * limp)
{
- register struct plimit *copy;
+ proc_list_lock();
+ limp->rlim_cur = p->p_rlimit[which].rlim_cur;
+ limp->rlim_max = p->p_rlimit[which].rlim_max;
+ proc_list_unlock();
+}
+
+
+void
+proc_limitdrop(proc_t p, int exiting)
+{
+ struct plimit * freelim = NULL;
+ struct plimit * freeoldlim = NULL;
+
+ proc_list_lock();
+
+ if (--p->p_limit->pl_refcnt == 0) {
+ freelim = p->p_limit;
+ p->p_limit = NULL;
+ }
+ if ((exiting != 0) && (p->p_olimit != NULL) && (--p->p_olimit->pl_refcnt == 0)) {
+ freeoldlim = p->p_olimit;
+ p->p_olimit = NULL;
+ }
+
+ proc_list_unlock();
+ if (freelim != NULL)
+ FREE_ZONE(freelim, sizeof *p->p_limit, M_PLIMIT);
+ if (freeoldlim != NULL)
+ FREE_ZONE(freeoldlim, sizeof *p->p_olimit, M_PLIMIT);
+}
+
+
+void
+proc_limitfork(proc_t parent, proc_t child)
+{
+ proc_list_lock();
+ child->p_limit = parent->p_limit;
+ child->p_limit->pl_refcnt++;
+ child->p_olimit = NULL;
+ proc_list_unlock();
+}
+
+void
+proc_limitblock(proc_t p)
+{
+ proc_lock(p);
+ while (p->p_lflag & P_LLIMCHANGE) {
+ p->p_lflag |= P_LLIMWAIT;
+ msleep(&p->p_olimit, &p->p_mlock, 0, "proc_limitblock", NULL);
+ }
+ p->p_lflag |= P_LLIMCHANGE;
+ proc_unlock(p);
+
+}
+
+
+void
+proc_limitunblock(proc_t p)
+{
+ proc_lock(p);
+ p->p_lflag &= ~P_LLIMCHANGE;
+ if (p->p_lflag & P_LLIMWAIT) {
+ p->p_lflag &= ~P_LLIMWAIT;
+ wakeup(&p->p_olimit);
+ }
+ proc_unlock(p);
+}
+
+/* This is called behind serialization provided by proc_limitblock/unlbock */
+int
+proc_limitreplace(proc_t p)
+{
+ struct plimit *copy;
+
+
+ proc_list_lock();
+
+ if (p->p_limit->pl_refcnt == 1) {
+ proc_list_unlock();
+ return(0);
+ }
+
+ proc_list_unlock();
MALLOC_ZONE(copy, struct plimit *,
- sizeof(struct plimit), M_SUBPROC, M_WAITOK);
- bcopy(lim->pl_rlimit, copy->pl_rlimit,
+ sizeof(struct plimit), M_PLIMIT, M_WAITOK);
+ if (copy == NULL) {
+ return(ENOMEM);
+ }
+
+ proc_list_lock();
+ bcopy(p->p_limit->pl_rlimit, copy->pl_rlimit,
sizeof(struct rlimit) * RLIM_NLIMITS);
- copy->p_lflags = 0;
- copy->p_refcnt = 1;
- return (copy);
+ copy->pl_refcnt = 1;
+ /* hang on to reference to old till process exits */
+ p->p_olimit = p->p_limit;
+ p->p_limit = copy;
+ proc_list_unlock();
+
+ return(0);
+}
+
+
+/*
+ * iopolicysys
+ *
+ * Description: System call MUX for use in manipulating I/O policy attributes of the current process or thread
+ *
+ * Parameters: cmd Policy command
+ * arg Pointer to policy arguments
+ *
+ * Returns: 0 Success
+ * EINVAL Invalid command or invalid policy arguments
+ *
+ */
+int
+iopolicysys(__unused struct proc *p, __unused struct iopolicysys_args *uap, __unused register_t *retval)
+{
+ int error = 0;
+ thread_t thread = THREAD_NULL;
+ int *policy;
+ struct uthread *ut = NULL;
+ struct _iopol_param_t iop_param;
+
+ if ((error = copyin(uap->arg, &iop_param, sizeof(iop_param))) != 0)
+ goto exit;
+
+ if (iop_param.iop_iotype != IOPOL_TYPE_DISK) {
+ error = EINVAL;
+ goto exit;
+ }
+
+ switch (iop_param.iop_scope) {
+ case IOPOL_SCOPE_PROCESS:
+ policy = &p->p_iopol_disk;
+ break;
+ case IOPOL_SCOPE_THREAD:
+ thread = current_thread();
+ ut = get_bsdthread_info(thread);
+ policy = &ut->uu_iopol_disk;
+ break;
+ default:
+ error = EINVAL;
+ goto exit;
+ }
+
+ switch(uap->cmd) {
+ case IOPOL_CMD_SET:
+ switch (iop_param.iop_policy) {
+ case IOPOL_DEFAULT:
+ case IOPOL_NORMAL:
+ case IOPOL_THROTTLE:
+ case IOPOL_PASSIVE:
+ proc_lock(p);
+ *policy = iop_param.iop_policy;
+ proc_unlock(p);
+ break;
+ default:
+ error = EINVAL;
+ goto exit;
+ }
+ break;
+ case IOPOL_CMD_GET:
+ switch (*policy) {
+ case IOPOL_DEFAULT:
+ case IOPOL_NORMAL:
+ case IOPOL_THROTTLE:
+ case IOPOL_PASSIVE:
+ iop_param.iop_policy = *policy;
+ break;
+ default: // in-kernel
+ // this should never happen
+ printf("%s: unknown I/O policy %d\n", __func__, *policy);
+ // restore to default value
+ *policy = IOPOL_DEFAULT;
+ iop_param.iop_policy = *policy;
+ }
+
+ error = copyout((caddr_t)&iop_param, uap->arg, sizeof(iop_param));
+ break;
+ default:
+ error = EINVAL; // unknown command
+ break;
+ }
+
+ exit:
+ *retval = error;
+ return (error);
}
projects / apple / xnu.git / blobdiff