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[apple/xnu.git] / bsd / kern / kern_resource.c
diff --git a/bsd/kern/kern_resource.c b/bsd/kern/kern_resource.c
index ca41339ea902e04ab7d027c39d20e41d48a8e29e..780159263d051645e27aea413e9f7592123608a2 100644 (file)
--- a/bsd/kern/kern_resource.c
+++ b/bsd/kern/kern_resource.c
@@ -1,5 +1,5 @@
 /*
 /*
- * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2017 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -81,8 +81,6 @@
 #include <sys/malloc.h>
 #include <sys/proc_internal.h>
 #include <sys/kauth.h>
 #include <sys/malloc.h>
 #include <sys/proc_internal.h>
 #include <sys/kauth.h>
-#include <machine/spl.h>
-
 #include <sys/mount_internal.h>
 #include <sys/sysproto.h>
 
 #include <sys/mount_internal.h>
 #include <sys/sysproto.h>
 
@@ -97,27 +95,51 @@
 #include <mach/vm_map.h>
 #include <mach/mach_vm.h>
 #include <mach/thread_act.h>  /* for thread_policy_set( ) */
 #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/thread.h>
+#include <kern/policy_internal.h>
 
 #include <kern/task.h>
 #include <kern/clock.h>                /* for absolutetime_to_microtime() */
 #include <netinet/in.h>                /* for TRAFFIC_MGT_SO_* */
 #include <sys/socketvar.h>     /* for struct socket */
 
 #include <kern/task.h>
 #include <kern/clock.h>                /* for absolutetime_to_microtime() */
 #include <netinet/in.h>                /* for TRAFFIC_MGT_SO_* */
 #include <sys/socketvar.h>     /* for struct socket */
+#if NECP
+#include <net/necp.h>
+#endif /* NECP */
 
 #include <vm/vm_map.h>
 
 
 #include <vm/vm_map.h>
 
+#include <kern/assert.h>
+#include <sys/resource.h>
+#include <sys/priv.h>
+#include <IOKit/IOBSD.h>
+
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
+
 int    donice(struct proc *curp, struct proc *chgp, int n);
 int    dosetrlimit(struct proc *p, u_int which, struct rlimit *limp);
 int    uthread_get_background_state(uthread_t);
 int    donice(struct proc *curp, struct proc *chgp, int n);
 int    dosetrlimit(struct proc *p, u_int which, struct rlimit *limp);
 int    uthread_get_background_state(uthread_t);
-static void do_background_socket(struct proc *p, thread_t thread, int priority);
-static int do_background_thread(struct proc *curp, thread_t thread, int priority);
+static void do_background_socket(struct proc *p, thread_t thread);
+static int do_background_thread(thread_t thread, int priority);
 static int do_background_proc(struct proc *curp, struct proc *targetp, int priority);
 static int do_background_proc(struct proc *curp, struct proc *targetp, int priority);
-void proc_apply_task_networkbg_internal(proc_t, thread_t);
-void proc_restore_task_networkbg_internal(proc_t, thread_t);
+static int set_gpudeny_proc(struct proc *curp, struct proc *targetp, int priority);
+static int proc_set_darwin_role(proc_t curp, proc_t targetp, int priority);
+static int proc_get_darwin_role(proc_t curp, proc_t targetp, int *priority);
+static int get_background_proc(struct proc *curp, struct proc *targetp, int *priority);
+int proc_pid_rusage(int pid, int flavor, user_addr_t buf, int32_t *retval);
+void gather_rusage_info(proc_t p, rusage_info_current *ru, int flavor);
+int fill_task_rusage(task_t task, rusage_info_current *ri);
+void fill_task_billed_usage(task_t task, rusage_info_current *ri);
+int fill_task_io_rusage(task_t task, rusage_info_current *ri);
+int fill_task_qos_rusage(task_t task, rusage_info_current *ri);
+uint64_t get_task_logical_writes(task_t task);
+void fill_task_monotonic_rusage(task_t task, rusage_info_current *ri);
+
+int proc_get_rusage(proc_t p, int flavor, user_addr_t buffer, __unused int is_zombie);
 
 rlim_t maxdmap = MAXDSIZ;      /* XXX */ 
 
 rlim_t maxdmap = MAXDSIZ;      /* XXX */ 
-rlim_t maxsmap = MAXSSIZ - PAGE_SIZE;  /* XXX */ 
+rlim_t maxsmap = MAXSSIZ - PAGE_MAX_SIZE;      /* XXX */ 
 
 /*
  * Limits on the number of open files per process, and the number
 
 /*
  * Limits on the number of open files per process, and the number
@@ -162,6 +184,8 @@ getpriority(struct proc *curp, struct getpriority_args *uap, int32_t *retval)
        struct proc *p;
        int low = PRIO_MAX + 1;
        kauth_cred_t my_cred;
        struct proc *p;
        int low = PRIO_MAX + 1;
        kauth_cred_t my_cred;
+       int refheld = 0;
+       int error = 0;
 
        /* would also test (uap->who < 0), but id_t is unsigned */
        if (uap->who > 0x7fffffff)
 
        /* would also test (uap->who < 0), but id_t is unsigned */
        if (uap->who > 0x7fffffff)
@@ -194,7 +218,7 @@ getpriority(struct proc *curp, struct getpriority_args *uap, int32_t *retval)
                }
                /* No need for iteration as it is a simple scan */
                pgrp_lock(pg);
                }
                /* 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) {
+               PGMEMBERS_FOREACH(pg, p) {
                        if (p->p_nice < low)
                                low = p->p_nice;
                }
                        if (p->p_nice < low)
                                low = p->p_nice;
                }
@@ -221,24 +245,50 @@ getpriority(struct proc *curp, struct getpriority_args *uap, int32_t *retval)
 
                break;
 
 
                break;
 
-       case PRIO_DARWIN_THREAD: {
-               thread_t                        thread;
-               struct uthread          *ut;
-
+       case PRIO_DARWIN_THREAD:
                /* we currently only support the current thread */
                /* we currently only support the current thread */
-               if (uap->who != 0) {
+               if (uap->who != 0)
                        return (EINVAL);
                        return (EINVAL);
+
+               low = proc_get_thread_policy(current_thread(), TASK_POLICY_INTERNAL, TASK_POLICY_DARWIN_BG);
+
+               break;
+
+       case PRIO_DARWIN_PROCESS:
+               if (uap->who == 0) {
+                       p = curp;
+               } else {
+                       p = proc_find(uap->who);
+                       if (p == PROC_NULL)
+                               break;
+                       refheld = 1;
                }
                }
-       
-               thread = current_thread();
-               ut = get_bsdthread_info(thread);
 
 
-               low = 0;
-               if ( (ut->uu_flag & UT_BACKGROUND_TRAFFIC_MGT) != 0 ) {
-                       low = 1;
+               error = get_background_proc(curp, p, &low);
+
+               if (refheld)
+                       proc_rele(p);
+               if (error)
+                       return (error);
+               break;
+
+       case PRIO_DARWIN_ROLE:
+               if (uap->who == 0) {
+                       p = curp;
+               } else {
+                       p = proc_find(uap->who);
+                       if (p == PROC_NULL)
+                               break;
+                       refheld = 1;
                }
                }
+
+               error = proc_get_darwin_role(curp, p, &low);
+
+               if (refheld)
+                       proc_rele(p);
+               if (error)
+                       return (error);
                break;
                break;
-       }
 
        default:
                return (EINVAL);
 
        default:
                return (EINVAL);
@@ -300,7 +350,7 @@ ppgrp_donice_callback(proc_t p, void * arg)
  */
 /* ARGSUSED */
 int
  */
 /* ARGSUSED */
 int
-setpriority(struct proc *curp, struct setpriority_args *uap, __unused int32_t *retval)
+setpriority(struct proc *curp, struct setpriority_args *uap, int32_t *retval)
 {
        struct proc *p;
        int found = 0, error = 0;
 {
        struct proc *p;
        int found = 0, error = 0;
@@ -369,17 +419,11 @@ setpriority(struct proc *curp, struct setpriority_args *uap, __unused int32_t *r
        }
 
        case PRIO_DARWIN_THREAD: {
        }
 
        case PRIO_DARWIN_THREAD: {
-               /* process marked for termination no priority management */
-               if ((curp->p_lflag & P_LPTERMINATE) != 0)
-                       return(EINVAL);
                /* we currently only support the current thread */
                /* we currently only support the current thread */
-               if (uap->who != 0) {
+               if (uap->who != 0)
                        return (EINVAL);
                        return (EINVAL);
-               }
-               error = do_background_thread(curp, current_thread(), uap->prio);
-               if (!error) {
-                       (void) do_background_socket(curp, current_thread(), uap->prio);
-               }
+
+               error = do_background_thread(current_thread(), uap->prio);
                found++;
                break;
        }
                found++;
                break;
        }
@@ -394,16 +438,41 @@ setpriority(struct proc *curp, struct setpriority_args *uap, __unused int32_t *r
                        refheld = 1;
                }
 
                        refheld = 1;
                }
 
-               /* process marked for termination no priority management */
-               if ((p->p_lflag & P_LPTERMINATE) != 0) {
-                       error = EINVAL;
+               error = do_background_proc(curp, p, uap->prio);
+
+               found++;
+               if (refheld != 0)
+                       proc_rele(p);
+               break;
+       }
+
+       case PRIO_DARWIN_GPU: {
+               if (uap->who == 0)
+                       return (EINVAL);
+
+               p = proc_find(uap->who);
+               if (p == PROC_NULL)
+                       break;
+
+               error = set_gpudeny_proc(curp, p, uap->prio);
+
+               found++;
+               proc_rele(p);
+               break;
+       }
+
+       case PRIO_DARWIN_ROLE: {
+               if (uap->who == 0) {
+                       p = curp;
                } else {
                } else {
-                       error = do_background_proc(curp, p, uap->prio);
-                       if (!error) {
-                               (void) do_background_socket(p, NULL, uap->prio);
-                       }
-               
+                       p = proc_find(uap->who);
+                       if (p == PROC_NULL)
+                               break;
+                       refheld = 1;
                }
                }
+
+               error = proc_set_darwin_role(curp, p, uap->prio);
+
                found++;
                if (refheld != 0)
                        proc_rele(p);
                found++;
                if (refheld != 0)
                        proc_rele(p);
@@ -415,6 +484,10 @@ setpriority(struct proc *curp, struct setpriority_args *uap, __unused int32_t *r
        }
        if (found == 0)
                return (ESRCH);
        }
        if (found == 0)
                return (ESRCH);
+       if (error == EIDRM) {
+               *retval = -2;
+               error = 0;
+       }
        return (error);
 }
 
        return (error);
 }
 
@@ -464,12 +537,172 @@ out:
        return (error);
 }
 
        return (error);
 }
 
+static int
+set_gpudeny_proc(struct proc *curp, struct proc *targetp, int priority)
+{
+       int error = 0;
+       kauth_cred_t ucred;
+       kauth_cred_t target_cred;
+
+       ucred = kauth_cred_get();
+       target_cred = kauth_cred_proc_ref(targetp);
+
+       /* TODO: Entitlement instead of uid check */
+
+       if (!kauth_cred_issuser(ucred) && kauth_cred_getruid(ucred) &&
+           kauth_cred_getuid(ucred)   != kauth_cred_getuid(target_cred) &&
+           kauth_cred_getruid(ucred)  != kauth_cred_getuid(target_cred)) {
+               error = EPERM;
+               goto out;
+       }
+
+       if (curp == targetp) {
+               error = EPERM;
+               goto out;
+       }
+
+#if CONFIG_MACF
+       error = mac_proc_check_sched(curp, targetp);
+       if (error)
+               goto out;
+#endif
+
+       switch (priority) {
+               case PRIO_DARWIN_GPU_DENY:
+                       task_set_gpu_denied(proc_task(targetp), TRUE);
+                       break;
+               case PRIO_DARWIN_GPU_ALLOW:
+                       task_set_gpu_denied(proc_task(targetp), FALSE);
+                       break;
+               default:
+                       error = EINVAL;
+                       goto out;
+       }
+
+out:
+       kauth_cred_unref(&target_cred);
+       return (error);
+
+}
+
+static int
+proc_set_darwin_role(proc_t curp, proc_t targetp, int priority)
+{
+       int error = 0;
+       uint32_t flagsp = 0;
+
+       kauth_cred_t ucred, target_cred;
+
+       ucred = kauth_cred_get();
+       target_cred = kauth_cred_proc_ref(targetp);
+
+       if (!kauth_cred_issuser(ucred) && kauth_cred_getruid(ucred) &&
+           kauth_cred_getuid(ucred)  != kauth_cred_getuid(target_cred) &&
+           kauth_cred_getruid(ucred) != kauth_cred_getuid(target_cred)) {
+               if (priv_check_cred(ucred, PRIV_SETPRIORITY_DARWIN_ROLE, 0) != 0) {
+                       error = EPERM;
+                       goto out;
+               }
+       }
+
+       if (curp != targetp) {
+#if CONFIG_MACF
+               if ((error = mac_proc_check_sched(curp, targetp)))
+                       goto out;
+#endif
+       }
+
+       proc_get_darwinbgstate(proc_task(targetp), &flagsp);
+       if ((flagsp & PROC_FLAG_APPLICATION) != PROC_FLAG_APPLICATION) {
+               error = ENOTSUP;
+               goto out;
+       }
+
+       integer_t role = 0;
+
+       if ((error = proc_darwin_role_to_task_role(priority, &role)))
+               goto out;
+
+       proc_set_task_policy(proc_task(targetp), TASK_POLICY_ATTRIBUTE,
+                            TASK_POLICY_ROLE, role);
+
+out:
+       kauth_cred_unref(&target_cred);
+       return (error);
+}
+
+static int
+proc_get_darwin_role(proc_t curp, proc_t targetp, int *priority)
+{
+       int error = 0;
+       int role = 0;
+
+       kauth_cred_t ucred, target_cred;
+
+       ucred = kauth_cred_get();
+       target_cred = kauth_cred_proc_ref(targetp);
+
+       if (!kauth_cred_issuser(ucred) && kauth_cred_getruid(ucred) &&
+           kauth_cred_getuid(ucred)  != kauth_cred_getuid(target_cred) &&
+           kauth_cred_getruid(ucred) != kauth_cred_getuid(target_cred)) {
+               error = EPERM;
+               goto out;
+       }
+
+       if (curp != targetp) {
+#if CONFIG_MACF
+               if ((error = mac_proc_check_sched(curp, targetp)))
+                       goto out;
+#endif
+       }
+
+       role = proc_get_task_policy(proc_task(targetp), TASK_POLICY_ATTRIBUTE, TASK_POLICY_ROLE);
+
+       *priority = proc_task_role_to_darwin_role(role);
+
+out:
+       kauth_cred_unref(&target_cred);
+       return (error);
+}
+
+
+static int
+get_background_proc(struct proc *curp, struct proc *targetp, int *priority)
+{
+       int external = 0;
+       int error = 0;
+       kauth_cred_t ucred, target_cred;
+
+       ucred = kauth_cred_get();
+       target_cred = kauth_cred_proc_ref(targetp);
+
+       if (!kauth_cred_issuser(ucred) && kauth_cred_getruid(ucred) &&
+           kauth_cred_getuid(ucred) != kauth_cred_getuid(target_cred) &&
+           kauth_cred_getruid(ucred) != kauth_cred_getuid(target_cred)) {
+               error = EPERM;
+               goto out;
+       }
+
+       external = (curp == targetp) ? TASK_POLICY_INTERNAL : TASK_POLICY_EXTERNAL;
+
+       *priority = proc_get_task_policy(current_task(), external, TASK_POLICY_DARWIN_BG);
+
+out:
+       kauth_cred_unref(&target_cred);
+       return (error);
+}
+
 static int
 do_background_proc(struct proc *curp, struct proc *targetp, int priority)
 {
 static int
 do_background_proc(struct proc *curp, struct proc *targetp, int priority)
 {
+#if !CONFIG_MACF
+#pragma unused(curp)
+#endif
        int error = 0;
        kauth_cred_t ucred;
        kauth_cred_t target_cred;
        int error = 0;
        kauth_cred_t ucred;
        kauth_cred_t target_cred;
+       int external;
+       int enable;
 
        ucred = kauth_cred_get();
        target_cred = kauth_cred_proc_ref(targetp);
 
        ucred = kauth_cred_get();
        target_cred = kauth_cred_proc_ref(targetp);
@@ -488,12 +721,22 @@ do_background_proc(struct proc *curp, struct proc *targetp, int priority)
                goto out;
 #endif
 
                goto out;
 #endif
 
-       if (priority == PRIO_DARWIN_NONUI)
-               error = proc_apply_task_gpuacc(targetp->task, TASK_POLICY_HWACCESS_GPU_ATTRIBUTE_NOACCESS);
-       else
-               error = proc_set_and_apply_bgtaskpolicy(targetp->task, priority);
-       if (error)
-               goto out;
+       external = (curp == targetp) ? TASK_POLICY_INTERNAL : TASK_POLICY_EXTERNAL;
+
+       switch (priority) {
+               case PRIO_DARWIN_BG:
+                       enable = TASK_POLICY_ENABLE;
+                       break;
+               case PRIO_DARWIN_NONUI:
+                       /* ignored for compatibility */
+                       goto out;
+               default:
+                       /* TODO: EINVAL if priority != 0 */
+                       enable = TASK_POLICY_DISABLE;
+                       break;
+       }
+
+       proc_set_task_policy(proc_task(targetp), external, TASK_POLICY_DARWIN_BG, enable);
 
 out:
        kauth_cred_unref(&target_cred);
 
 out:
        kauth_cred_unref(&target_cred);
@@ -501,143 +744,126 @@ out:
 }
 
 static void 
 }
 
 static void 
-do_background_socket(struct proc *p, thread_t thread, int priority)
+do_background_socket(struct proc *p, thread_t thread)
 {
 {
+#if SOCKETS
        struct filedesc                     *fdp;
        struct fileproc                     *fp;
        struct filedesc                     *fdp;
        struct fileproc                     *fp;
-       int                                 i;
+       int                                 i, background;
+
+       proc_fdlock(p);
+
+       if (thread != THREAD_NULL)
+               background = proc_get_effective_thread_policy(thread, TASK_POLICY_ALL_SOCKETS_BG);
+       else
+               background = proc_get_effective_task_policy(proc_task(p), TASK_POLICY_ALL_SOCKETS_BG);
 
 
-       if (priority == PRIO_DARWIN_BG) {
+       if (background) {
                /*
                 * For PRIO_DARWIN_PROCESS (thread is NULL), simply mark
                 * the sockets with the background flag.  There's nothing
                 * to do here for the PRIO_DARWIN_THREAD case.
                 */
                /*
                 * For PRIO_DARWIN_PROCESS (thread is NULL), simply mark
                 * the sockets with the background flag.  There's nothing
                 * to do here for the PRIO_DARWIN_THREAD case.
                 */
-               if (thread == NULL) {
-                       proc_fdlock(p);
+               if (thread == THREAD_NULL) {
                        fdp = p->p_fd;
 
                        for (i = 0; i < fdp->fd_nfiles; i++) {
                        fdp = p->p_fd;
 
                        for (i = 0; i < fdp->fd_nfiles; i++) {
-                               struct socket       *sockp;
-
                                fp = fdp->fd_ofiles[i];
                                fp = fdp->fd_ofiles[i];
-                               if (fp == NULL || (fdp->fd_ofileflags[i] & UF_RESERVED) != 0 ||
-                                               fp->f_fglob->fg_type != DTYPE_SOCKET) {
+                               if (fp == NULL || (fdp->fd_ofileflags[i] & UF_RESERVED) != 0) {
                                        continue;
                                }
                                        continue;
                                }
-                               sockp = (struct socket *)fp->f_fglob->fg_data;
-                               socket_set_traffic_mgt_flags(sockp, TRAFFIC_MGT_SO_BACKGROUND);
-                               sockp->so_background_thread = NULL;
+                               if (FILEGLOB_DTYPE(fp->f_fglob) == DTYPE_SOCKET) {
+                                       struct socket *sockp = (struct socket *)fp->f_fglob->fg_data;
+                                       socket_set_traffic_mgt_flags(sockp, TRAFFIC_MGT_SO_BACKGROUND);
+                                       sockp->so_background_thread = NULL;
+                               }
+#if NECP
+                               else if (FILEGLOB_DTYPE(fp->f_fglob) == DTYPE_NETPOLICY) {
+                                       necp_set_client_as_background(p, fp, background);
+                               }
+#endif /* NECP */
                        }
                        }
-                       proc_fdunlock(p);
                }
                }
-
        } else {
        } else {
-
                /* 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.  
                 */
                /* 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(p);
                fdp = p->p_fd;
                for ( i = 0; i < fdp->fd_nfiles; i++ ) {
                        struct socket       *sockp;
 
                        fp = fdp->fd_ofiles[ i ];
                fdp = p->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 ) {
+                       if (fp == NULL || (fdp->fd_ofileflags[ i ] & UF_RESERVED) != 0) {
                                continue;
                        }
                                continue;
                        }
-                       sockp = (struct socket *)fp->f_fglob->fg_data;
-                       /* skip if only clearing this thread's sockets */
-                       if ((thread) && (sockp->so_background_thread != thread)) {
-                               continue;
+                       if (FILEGLOB_DTYPE(fp->f_fglob) == DTYPE_SOCKET) {
+                               sockp = (struct socket *)fp->f_fglob->fg_data;
+                               /* skip if only clearing this thread's sockets */
+                               if ((thread) && (sockp->so_background_thread != thread)) {
+                                       continue;
+                               }
+                               socket_clear_traffic_mgt_flags(sockp, TRAFFIC_MGT_SO_BACKGROUND);
+                               sockp->so_background_thread = NULL;
+                       }
+#if NECP
+                       else if (FILEGLOB_DTYPE(fp->f_fglob) == DTYPE_NETPOLICY) {
+                               necp_set_client_as_background(p, fp, background);
                        }
                        }
-                       socket_clear_traffic_mgt_flags(sockp, TRAFFIC_MGT_SO_BACKGROUND);
-                       sockp->so_background_thread = NULL;
+#endif /* NECP */
                }
                }
-               proc_fdunlock(p);
        }
        }
+
+       proc_fdunlock(p);
+#else
+#pragma unused(p, thread)
+#endif
 }
 
 
 /*
  * do_background_thread
 }
 
 
 /*
  * do_background_thread
- * Returns:    0                       Success
- * XXX - todo - does this need a MACF hook?
  *
  *
- * NOTE: To maintain binary compatibility with PRIO_DARWIN_THREAD with respect
- *      to network traffic management, UT_BACKGROUND_TRAFFIC_MGT is set/cleared
- *      along with UT_BACKGROUND flag, as the latter alone no longer implies
- *      any form of traffic regulation (it simply means that the thread is
- *      background.)  With PRIO_DARWIN_PROCESS, any form of network traffic
- *      management must be explicitly requested via whatever means appropriate,
- *      and only TRAFFIC_MGT_SO_BACKGROUND is set via do_background_socket().
+ * Requires: thread reference
+ *
+ * Returns:     0                       Success
+ *              EPERM                   Tried to background while in vfork
+ * XXX - todo - does this need a MACF hook?
  */
 static int
  */
 static int
-do_background_thread(struct proc *curp __unused, thread_t thread, int priority)
+do_background_thread(thread_t thread, int priority)
 {
 {
-       struct uthread                                          *ut;
-       int error = 0;
-       
+       struct uthread *ut;
+       int enable, external;
+       int rv = 0;
+
        ut = get_bsdthread_info(thread);
 
        /* Backgrounding is unsupported for threads in vfork */
        ut = get_bsdthread_info(thread);
 
        /* Backgrounding is unsupported for threads in vfork */
-       if ( (ut->uu_flag & UT_VFORK) != 0) {
+       if ((ut->uu_flag & UT_VFORK) != 0)
                return(EPERM);
                return(EPERM);
-       }
-
-       error = proc_set_and_apply_bgthreadpolicy(curp->task, thread_tid(thread), priority);
-       return(error);
 
 
-}
-
-#if CONFIG_EMBEDDED
-int mach_do_background_thread(thread_t thread, int prio);
-
-int
-mach_do_background_thread(thread_t thread, int prio)
-{
-       int                     error           = 0;
-       struct proc             *curp           = NULL;
-       struct proc             *targetp        = NULL;
-       kauth_cred_t    ucred;
-
-       targetp = get_bsdtask_info(get_threadtask(thread));
-       if (!targetp) {
-               return KERN_INVALID_ARGUMENT;
+       /* Backgrounding is unsupported for workq threads */
+       if (thread_is_static_param(thread)) {
+               return(EPERM);
        }
 
        }
 
-       curp = proc_self();
-       if (curp == PROC_NULL) {
-               return KERN_FAILURE;
+       /* Not allowed to combine QoS and DARWIN_BG, doing so strips the QoS */
+       if (thread_has_qos_policy(thread)) {
+               thread_remove_qos_policy(thread);
+               rv = EIDRM;
        }
 
        }
 
-       ucred = kauth_cred_proc_ref(curp);
-
-       if (suser(ucred, NULL) && curp != targetp) {
-               error = KERN_PROTECTION_FAILURE;
-               goto out;
-       }
+       /* TODO: Fail if someone passes something besides 0 or PRIO_DARWIN_BG */
+       enable   = (priority == PRIO_DARWIN_BG) ? TASK_POLICY_ENABLE   : TASK_POLICY_DISABLE;
+       external = (current_thread() == thread) ? TASK_POLICY_INTERNAL : TASK_POLICY_EXTERNAL;
 
 
-       error = do_background_thread(curp, thread, prio);
-       if (!error) {
-               (void) do_background_socket(curp, thread, prio);
-       } else {
-               if (error == EPERM) {
-                       error = KERN_PROTECTION_FAILURE;
-               } else {
-                       error = KERN_FAILURE;
-               }
-       }
+       proc_set_thread_policy(thread, external, TASK_POLICY_DARWIN_BG, enable);
 
 
-out:
-       proc_rele(curp);
-       kauth_cred_unref(&ucred);
-       return error;
+       return rv;
 }
 }
-#endif /* CONFIG_EMBEDDED */
+
 
 /*
  * Returns:    0                       Success
 
 /*
  * Returns:    0                       Success
@@ -848,7 +1074,7 @@ dosetrlimit(struct proc *p, u_int which, struct rlimit *limp)
                 * because historically, people have been able to attempt to
                 * set RLIM_INFINITY to get "whatever the maximum is".
                */
                 * because historically, people have been able to attempt to
                 * set RLIM_INFINITY to get "whatever the maximum is".
                */
-               if ( is_suser() ) {
+               if ( kauth_cred_issuser(kauth_cred_get()) ) {
                        if (limp->rlim_cur != alimp->rlim_cur &&
                            limp->rlim_cur > (rlim_t)maxfiles) {
                                if (posix) {
                        if (limp->rlim_cur != alimp->rlim_cur &&
                            limp->rlim_cur > (rlim_t)maxfiles) {
                                if (posix) {
@@ -882,7 +1108,7 @@ dosetrlimit(struct proc *p, u_int which, struct rlimit *limp)
                 * systemwide resource; all others are limited to
                 * maxprocperuid (presumably less than maxproc).
                 */
                 * systemwide resource; all others are limited to
                 * maxprocperuid (presumably less than maxproc).
                 */
-               if ( is_suser() ) {
+               if ( kauth_cred_issuser(kauth_cred_get()) ) {
                        if (limp->rlim_cur > (rlim_t)maxproc)
                                limp->rlim_cur = maxproc;
                        if (limp->rlim_max > (rlim_t)maxproc)
                        if (limp->rlim_cur > (rlim_t)maxproc)
                                limp->rlim_cur = maxproc;
                        if (limp->rlim_max > (rlim_t)maxproc)
@@ -918,7 +1144,7 @@ out:
 int
 getrlimit(struct proc *p, struct getrlimit_args *uap, __unused int32_t *retval)
 {
 int
 getrlimit(struct proc *p, struct getrlimit_args *uap, __unused int32_t *retval)
 {
-       struct rlimit lim;
+       struct rlimit lim = {};
 
        /*
         * Take out flag now in case we need to use it to trigger variant
 
        /*
         * Take out flag now in case we need to use it to trigger variant
@@ -1065,6 +1291,31 @@ ruadd(struct rusage *ru, struct rusage *ru2)
                *ip++ += *ip2++;
 }
 
                *ip++ += *ip2++;
 }
 
+/*
+ * Add the rusage stats of child in parent.
+ * 
+ * It adds rusage statistics of child process and statistics of all its
+ * children to its parent.
+ *
+ * Note: proc lock of parent should be held while calling this function.
+ */
+void
+update_rusage_info_child(struct rusage_info_child *ri, rusage_info_current *ri_current)
+{
+       ri->ri_child_user_time += (ri_current->ri_user_time +
+                                       ri_current->ri_child_user_time);
+       ri->ri_child_system_time += (ri_current->ri_system_time +
+                                       ri_current->ri_child_system_time);
+       ri->ri_child_pkg_idle_wkups += (ri_current->ri_pkg_idle_wkups +
+                                       ri_current->ri_child_pkg_idle_wkups);
+       ri->ri_child_interrupt_wkups += (ri_current->ri_interrupt_wkups +
+                                       ri_current->ri_child_interrupt_wkups);
+       ri->ri_child_pageins += (ri_current->ri_pageins +
+                                       ri_current->ri_child_pageins);
+       ri->ri_child_elapsed_abstime += ((ri_current->ri_proc_exit_abstime -
+               ri_current->ri_proc_start_abstime) + ri_current->ri_child_elapsed_abstime);
+}
+
 void
 proc_limitget(proc_t p, int which, struct rlimit * limp)
 {
 void
 proc_limitget(proc_t p, int which, struct rlimit * limp)
 {
@@ -1170,7 +1421,6 @@ proc_limitreplace(proc_t p)
        return(0);
 }
 
        return(0);
 }
 
-
 /*
  * iopolicysys
  *
 /*
  * iopolicysys
  *
@@ -1183,133 +1433,486 @@ proc_limitreplace(proc_t p)
  *             EINVAL                          Invalid command or invalid policy arguments
  *
  */
  *             EINVAL                          Invalid command or invalid policy arguments
  *
  */
+
+static int
+iopolicysys_disk(struct proc *p, int cmd, int scope, int policy, struct _iopol_param_t *iop_param);
+static int
+iopolicysys_vfs(struct proc *p, int cmd, int scope, int policy, struct _iopol_param_t *iop_param);
+
 int
 int
-iopolicysys(__unused struct proc *p, __unused struct iopolicysys_args *uap, __unused int32_t *retval)
+iopolicysys(struct proc *p, struct iopolicysys_args *uap, int32_t *retval)
 {
 {
-       int     error = 0;
+       int     error = 0;
        struct _iopol_param_t iop_param;
        struct _iopol_param_t iop_param;
-       int processwide = 0;
 
        if ((error = copyin(uap->arg, &iop_param, sizeof(iop_param))) != 0)
                goto out;
 
 
        if ((error = copyin(uap->arg, &iop_param, sizeof(iop_param))) != 0)
                goto out;
 
-       if (iop_param.iop_iotype != IOPOL_TYPE_DISK) {
-               error = EINVAL;
-               goto out;
+       switch (iop_param.iop_iotype) {
+               case IOPOL_TYPE_DISK:
+                       error = iopolicysys_disk(p, uap->cmd, iop_param.iop_scope, iop_param.iop_policy, &iop_param);
+                       if (error == EIDRM) {
+                               *retval = -2;
+                               error = 0;
+                       }
+                       if (error)
+                               goto out;
+                       break;
+               case IOPOL_TYPE_VFS_HFS_CASE_SENSITIVITY:
+                       error = iopolicysys_vfs(p, uap->cmd, iop_param.iop_scope, iop_param.iop_policy, &iop_param);
+                       if (error)
+                               goto out;
+                       break;
+               default:
+                       error = EINVAL;
+                       goto out;
        }
 
        }
 
-       switch (iop_param.iop_scope) {
-       case IOPOL_SCOPE_PROCESS:
-               processwide = 1;
-               break;
-       case IOPOL_SCOPE_THREAD:
-               processwide = 0;
-               break;
-       default:
-               error = EINVAL;
-               goto out;
+       /* Individual iotype handlers are expected to update iop_param, if requested with a GET command */
+       if (uap->cmd == IOPOL_CMD_GET) {
+               error = copyout((caddr_t)&iop_param, uap->arg, sizeof(iop_param));
+               if (error)
+                       goto out;
        }
        }
-               
-       switch(uap->cmd) {
-       case IOPOL_CMD_SET:
-               switch (iop_param.iop_policy) {
-               case IOPOL_DEFAULT:
-               case IOPOL_NORMAL:
-               case IOPOL_THROTTLE:
-               case IOPOL_PASSIVE:
-               case IOPOL_UTILITY:
-                       if(processwide != 0)
-                               proc_apply_task_diskacc(current_task(), iop_param.iop_policy);
-                       else
-                               proc_apply_thread_selfdiskacc(iop_param.iop_policy);
-                               
+
+out:
+       return (error);
+}
+
+static int
+iopolicysys_disk(struct proc *p __unused, int cmd, int scope, int policy, struct _iopol_param_t *iop_param)
+{
+       int                     error = 0;
+       thread_t        thread;
+       int                     policy_flavor;
+
+       /* Validate scope */
+       switch (scope) {
+               case IOPOL_SCOPE_PROCESS:
+                       thread = THREAD_NULL;
+                       policy_flavor = TASK_POLICY_IOPOL;
                        break;
                        break;
+
+               case IOPOL_SCOPE_THREAD:
+                       thread = current_thread();
+                       policy_flavor = TASK_POLICY_IOPOL;
+
+                       /* Not allowed to combine QoS and (non-PASSIVE) IO policy, doing so strips the QoS */
+                       if (cmd == IOPOL_CMD_SET && thread_has_qos_policy(thread)) {
+                               switch (policy) {
+                                       case IOPOL_DEFAULT:
+                                       case IOPOL_PASSIVE:
+                                               break;
+                                       case IOPOL_UTILITY:
+                                       case IOPOL_THROTTLE:
+                                       case IOPOL_IMPORTANT:
+                                       case IOPOL_STANDARD:
+                                               if (!thread_is_static_param(thread)) {
+                                                       thread_remove_qos_policy(thread);
+                                                       /*
+                                                        * This is not an error case, this is to return a marker to user-space that
+                                                        * we stripped the thread of its QoS class.
+                                                        */
+                                                       error = EIDRM;
+                                                       break;
+                                               }
+                                               /* otherwise, fall through to the error case. */
+                                       default:
+                                               error = EINVAL;
+                                               goto out;
+                               }
+                       }
+                       break;
+
+               case IOPOL_SCOPE_DARWIN_BG:
+#if CONFIG_EMBEDDED
+                       /* Embedded doesn't want this as BG is always IOPOL_THROTTLE */
+                       error = ENOTSUP;
+                       goto out;
+#else /* CONFIG_EMBEDDED */
+                       thread = THREAD_NULL;
+                       policy_flavor = TASK_POLICY_DARWIN_BG_IOPOL;
+                       break;
+#endif /* CONFIG_EMBEDDED */
+
                default:
                        error = EINVAL;
                        goto out;
                default:
                        error = EINVAL;
                        goto out;
+       }
+
+       /* Validate policy */
+       if (cmd == IOPOL_CMD_SET) {
+               switch (policy) {
+                       case IOPOL_DEFAULT:
+                               if (scope == IOPOL_SCOPE_DARWIN_BG) {
+                                       /* the current default BG throttle level is UTILITY */
+                                       policy = IOPOL_UTILITY;
+                               } else {
+                                       policy = IOPOL_IMPORTANT;
+                               }
+                               break;
+                       case IOPOL_UTILITY:
+                               /* fall-through */
+                       case IOPOL_THROTTLE:
+                               /* These levels are OK */
+                               break;
+                       case IOPOL_IMPORTANT:
+                               /* fall-through */
+                       case IOPOL_STANDARD:
+                               /* fall-through */
+                       case IOPOL_PASSIVE:
+                               if (scope == IOPOL_SCOPE_DARWIN_BG) {
+                                       /* These levels are invalid for BG */
+                                       error = EINVAL;
+                                       goto out;
+                               } else {
+                                       /* OK for other scopes */
+                               }
+                               break;
+                       default:
+                               error = EINVAL;
+                               goto out;
                }
                }
-               break;
-       
-       case IOPOL_CMD_GET:
-               if(processwide != 0)
-                       iop_param.iop_policy = proc_get_task_disacc(current_task());
-               else
-                       iop_param.iop_policy = proc_get_thread_selfdiskacc();
-                       
-               error = copyout((caddr_t)&iop_param, uap->arg, sizeof(iop_param));
+       }
 
 
-               break;
-       default:
-               error = EINVAL; // unknown command
-               break;
+       /* Perform command */
+       switch(cmd) {
+               case IOPOL_CMD_SET:
+                       if (thread != THREAD_NULL)
+                               proc_set_thread_policy(thread, TASK_POLICY_INTERNAL, policy_flavor, policy);
+                       else
+                               proc_set_task_policy(current_task(), TASK_POLICY_INTERNAL, policy_flavor, policy);
+                       break;
+               case IOPOL_CMD_GET:
+                       if (thread != THREAD_NULL)
+                               policy = proc_get_thread_policy(thread, TASK_POLICY_INTERNAL, policy_flavor);
+                       else
+                               policy = proc_get_task_policy(current_task(), TASK_POLICY_INTERNAL, policy_flavor);
+                       iop_param->iop_policy = policy;
+                       break;
+               default:
+                       error = EINVAL; /* unknown command */
+                       break;
        }
 
 out:
        }
 
 out:
-       *retval = error;
        return (error);
 }
 
        return (error);
 }
 
+static int
+iopolicysys_vfs(struct proc *p, int cmd, int scope, int policy, struct _iopol_param_t *iop_param)
+{
+       int                     error = 0;
 
 
-boolean_t thread_is_io_throttled(void);
+       /* Validate scope */
+       switch (scope) {
+               case IOPOL_SCOPE_PROCESS:
+                       /* Only process OK */
+                       break;
+               default:
+                       error = EINVAL;
+                       goto out;
+       }
 
 
-boolean_t
-thread_is_io_throttled(void) 
-{
-       return(proc_get_task_selfdiskacc() == IOPOL_THROTTLE);
+       /* Validate policy */
+       if (cmd == IOPOL_CMD_SET) {
+               switch (policy) {
+                       case IOPOL_VFS_HFS_CASE_SENSITIVITY_DEFAULT:
+                               /* fall-through */
+                       case IOPOL_VFS_HFS_CASE_SENSITIVITY_FORCE_CASE_SENSITIVE:
+                               /* These policies are OK */
+                               break;
+                       default:
+                               error = EINVAL;
+                               goto out;
+               }
+       }
+
+       /* Perform command */
+       switch(cmd) {
+               case IOPOL_CMD_SET:
+                       if (0 == kauth_cred_issuser(kauth_cred_get())) {
+                               /* If it's a non-root process, it needs to have the entitlement to set the policy */
+                               boolean_t entitled = FALSE;
+                               entitled = IOTaskHasEntitlement(current_task(), "com.apple.private.iopol.case_sensitivity");
+                               if (!entitled) {
+                                       error = EPERM;
+                                       goto out;
+                               }
+                       }
+
+                       switch (policy) {
+                               case IOPOL_VFS_HFS_CASE_SENSITIVITY_DEFAULT:
+                                       OSBitAndAtomic16(~((uint32_t)P_VFS_IOPOLICY_FORCE_HFS_CASE_SENSITIVITY), &p->p_vfs_iopolicy);
+                                       break;
+                               case IOPOL_VFS_HFS_CASE_SENSITIVITY_FORCE_CASE_SENSITIVE:
+                                       OSBitOrAtomic16((uint32_t)P_VFS_IOPOLICY_FORCE_HFS_CASE_SENSITIVITY, &p->p_vfs_iopolicy);
+                                       break;
+                               default:
+                                       error = EINVAL;
+                                       goto out;
+                       }
+                       
+                       break;
+               case IOPOL_CMD_GET:
+                       iop_param->iop_policy = (p->p_vfs_iopolicy & P_VFS_IOPOLICY_FORCE_HFS_CASE_SENSITIVITY)
+                               ? IOPOL_VFS_HFS_CASE_SENSITIVITY_FORCE_CASE_SENSITIVE
+                               : IOPOL_VFS_HFS_CASE_SENSITIVITY_DEFAULT;
+                       break;
+               default:
+                       error = EINVAL; /* unknown command */
+                       break;
+       }
+
+out:
+       return (error);
 }
 
 }
 
+/* BSD call back function for task_policy networking changes */
 void
 void
-proc_apply_task_networkbg(void * bsd_info)
+proc_apply_task_networkbg(void * bsd_info, thread_t thread)
 {
 {
-       proc_t p = PROC_NULL;
-       proc_t curp = (proc_t)bsd_info;
-       pid_t pid;
+       assert(bsd_info != PROC_NULL);
+
+       pid_t pid = proc_pid((proc_t)bsd_info);
+
+       proc_t p = proc_find(pid);
 
 
-       pid = curp->p_pid;
-       p = proc_find(pid);
        if (p != PROC_NULL) {
        if (p != PROC_NULL) {
-               do_background_socket(p, NULL, PRIO_DARWIN_BG);
+               assert(p == (proc_t)bsd_info);
+
+               do_background_socket(p, thread);
                proc_rele(p);
        }
 }
 
 void
                proc_rele(p);
        }
 }
 
 void
-proc_restore_task_networkbg(void * bsd_info)
+gather_rusage_info(proc_t p, rusage_info_current *ru, int flavor)
 {
 {
-       proc_t p = PROC_NULL;
-       proc_t curp = (proc_t)bsd_info;
-       pid_t pid;
+       struct rusage_info_child *ri_child;
+
+       assert(p->p_stats != NULL);
+       memset(ru, 0, sizeof(*ru));
+       switch(flavor) {
+       case RUSAGE_INFO_V4:
+               ru->ri_logical_writes = get_task_logical_writes(p->task);
+               ru->ri_lifetime_max_phys_footprint = get_task_phys_footprint_lifetime_max(p->task);
+               fill_task_monotonic_rusage(p->task, ru);
+        /* fall through */
+
+       case RUSAGE_INFO_V3:
+               fill_task_qos_rusage(p->task, ru);
+               fill_task_billed_usage(p->task, ru);
+               /* fall through */
+
+       case RUSAGE_INFO_V2:
+               fill_task_io_rusage(p->task, ru);
+               /* fall through */
+
+       case RUSAGE_INFO_V1:
+               /*
+                * p->p_stats->ri_child statistics are protected under proc lock.
+                */
+               proc_lock(p);
+               
+               ri_child = &(p->p_stats->ri_child);
+               ru->ri_child_user_time = ri_child->ri_child_user_time;
+               ru->ri_child_system_time = ri_child->ri_child_system_time;
+               ru->ri_child_pkg_idle_wkups = ri_child->ri_child_pkg_idle_wkups;
+               ru->ri_child_interrupt_wkups = ri_child->ri_child_interrupt_wkups;
+               ru->ri_child_pageins = ri_child->ri_child_pageins;
+               ru->ri_child_elapsed_abstime = ri_child->ri_child_elapsed_abstime;
 
 
-       pid = curp->p_pid;
-       p = proc_find(pid);
-       if (p != PROC_NULL) {
-               do_background_socket(p, NULL, 0);
-               proc_rele(p);
-       }
+               proc_unlock(p);
+               /* fall through */
 
 
+       case RUSAGE_INFO_V0:
+               proc_getexecutableuuid(p, (unsigned char *)&ru->ri_uuid, sizeof (ru->ri_uuid));
+               fill_task_rusage(p->task, ru);
+               ru->ri_proc_start_abstime = p->p_stats->ps_start;
+       }
 }
 
 }
 
-void
-proc_set_task_networkbg(void * bsdinfo, int setbg)
+int
+proc_get_rusage(proc_t p, int flavor, user_addr_t buffer, __unused int is_zombie)
 {
 {
-       if (setbg != 0)
-               proc_apply_task_networkbg(bsdinfo);
-       else
-               proc_restore_task_networkbg(bsdinfo);
+       rusage_info_current ri_current;
+
+       int error = 0;
+       size_t size = 0;
+
+       switch (flavor) {
+       case RUSAGE_INFO_V0:
+               size = sizeof(struct rusage_info_v0);
+               break;
+
+       case RUSAGE_INFO_V1:
+               size = sizeof(struct rusage_info_v1);
+               break;
+
+       case RUSAGE_INFO_V2:
+               size = sizeof(struct rusage_info_v2);
+               break;
+
+       case RUSAGE_INFO_V3:
+               size = sizeof(struct rusage_info_v3);
+               break;
+
+       case RUSAGE_INFO_V4:
+               size = sizeof(struct rusage_info_v4);
+               break;
+
+       default:
+               return EINVAL;
+       }
+
+       if(size == 0) {
+               return EINVAL;
+       }
+
+        /*
+        * If task is still alive, collect info from the live task itself.
+        * Otherwise, look to the cached info in the zombie proc.
+        */
+       if (p->p_ru == NULL) {
+               gather_rusage_info(p, &ri_current, flavor);
+               ri_current.ri_proc_exit_abstime = 0;
+               error = copyout(&ri_current, buffer, size);
+       } else {
+               ri_current = p->p_ru->ri;
+               error = copyout(&p->p_ru->ri, buffer, size);
+       }
+
+       return (error);
 }
 
 }
 
-void
-proc_apply_task_networkbg_internal(proc_t p, thread_t thread)
+static int
+mach_to_bsd_rv(int mach_rv)
 {
 {
-       if (p != PROC_NULL) {
-               do_background_socket(p, thread, PRIO_DARWIN_BG);
+       int bsd_rv = 0;
+
+       switch (mach_rv) {
+       case KERN_SUCCESS:
+               bsd_rv = 0;
+               break;
+       case KERN_INVALID_ARGUMENT:
+               bsd_rv = EINVAL;
+               break;
+       default:
+               panic("unknown error %#x", mach_rv);
        }
        }
+
+       return bsd_rv;
 }
 }
-void
-proc_restore_task_networkbg_internal(proc_t p, thread_t thread)
+
+/*
+ * Resource limit controls
+ *
+ * uap->flavor available flavors:
+ *
+ *     RLIMIT_WAKEUPS_MONITOR
+ */
+int
+proc_rlimit_control(__unused struct proc *p, struct proc_rlimit_control_args *uap, __unused int32_t *retval)
 {
 {
-       if (p != PROC_NULL) {
-               do_background_socket(p, thread, PRIO_DARWIN_BG);
+       proc_t  targetp;
+       int     error = 0;
+       struct  proc_rlimit_control_wakeupmon wakeupmon_args;
+       uint32_t cpumon_flags;
+       uint32_t cpulimits_flags;
+       kauth_cred_t my_cred, target_cred;
+
+       /* -1 implicitly means our own process (perhaps even the current thread for per-thread attributes) */
+       if (uap->pid == -1) {
+               targetp = proc_self();
+       } else {
+               targetp = proc_find(uap->pid);
+       }
+
+       /* proc_self() can return NULL for an exiting process */
+       if (targetp == PROC_NULL) {
+               return (ESRCH);
+       }
+
+       my_cred = kauth_cred_get();
+       target_cred = kauth_cred_proc_ref(targetp);
+
+       if (!kauth_cred_issuser(my_cred) && kauth_cred_getruid(my_cred) &&
+           kauth_cred_getuid(my_cred) != kauth_cred_getuid(target_cred) &&
+           kauth_cred_getruid(my_cred) != kauth_cred_getuid(target_cred)) {
+               proc_rele(targetp);
+               kauth_cred_unref(&target_cred);
+               return (EACCES);
        }
        }
+
+       switch (uap->flavor) {
+       case RLIMIT_WAKEUPS_MONITOR:
+               if ((error = copyin(uap->arg, &wakeupmon_args, sizeof (wakeupmon_args))) != 0) {
+                       break;
+               }
+               if ((error = mach_to_bsd_rv(task_wakeups_monitor_ctl(targetp->task, &wakeupmon_args.wm_flags,
+                    &wakeupmon_args.wm_rate))) != 0) {
+                       break;
+               }
+               error = copyout(&wakeupmon_args, uap->arg, sizeof (wakeupmon_args));
+               break;
+       case RLIMIT_CPU_USAGE_MONITOR:
+               cpumon_flags = uap->arg; // XXX temporarily stashing flags in argp (12592127)
+               error = mach_to_bsd_rv(task_cpu_usage_monitor_ctl(targetp->task, &cpumon_flags));
+               break;
+       case RLIMIT_THREAD_CPULIMITS:
+               cpulimits_flags = (uint32_t)uap->arg; // only need a limited set of bits, pass in void * argument
+
+               if (uap->pid != -1) {
+                       error = EINVAL;
+                       break;
+               }
+
+               uint8_t percent = 0;
+               uint32_t ms_refill = 0;
+               uint64_t ns_refill;
+
+               percent = (uint8_t)(cpulimits_flags & 0xffU);                                   /* low 8 bits for percent */
+               ms_refill = (cpulimits_flags >> 8) & 0xffffff;          /* next 24 bits represent ms refill value */
+               if (percent >= 100) {
+                       error = EINVAL;
+                       break;
+               }
+
+               ns_refill = ((uint64_t)ms_refill) * NSEC_PER_MSEC;
+
+               error = mach_to_bsd_rv(thread_set_cpulimit(THREAD_CPULIMIT_BLOCK, percent, ns_refill));
+               break;
+       default:
+               error = EINVAL;
+               break;
+       }
+
+       proc_rele(targetp);
+       kauth_cred_unref(&target_cred);
+
+       /*
+        * Return value from this function becomes errno to userland caller.
+        */
+       return (error);
 }
 
 }
 
+/*
+ * Return the current amount of CPU consumed by this thread (in either user or kernel mode)
+ */
+int thread_selfusage(struct proc *p __unused, struct thread_selfusage_args *uap __unused, uint64_t *retval)
+{
+       uint64_t runtime;
+
+       runtime = thread_get_runtime_self();
+       *retval = runtime;
+
+       return (0);
+}
+
+#if !MONOTONIC
+int thread_selfcounts(__unused struct proc *p, __unused struct thread_selfcounts_args *uap, __unused int *ret_out)
+{
+       return ENOTSUP;
+}
+#endif /* !MONOTONIC */
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