/*
* Copyright (c) 2000-2021 Apple 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. 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
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*
*
* Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)init_main.c 8.16 (Berkeley) 5/14/95
*/
/*
*
* Mach Operating System
* Copyright (c) 1987 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
/*
* NOTICE: This file was modified by McAfee Research in 2004 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/filedesc.h>
#include <sys/kernel.h>
#include <sys/mount_internal.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
#include <sys/systm.h>
#include <sys/vnode_internal.h>
#include <sys/conf.h>
#include <sys/buf_internal.h>
#include <sys/user.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <sys/mman.h>
#include <security/audit/audit.h>
#include <sys/malloc.h>
#include <sys/dkstat.h>
#include <sys/codesign.h>
#include <kern/startup.h>
#include <kern/thread.h>
#include <kern/task.h>
#include <kern/ast.h>
#include <kern/zalloc.h>
#include <kern/ux_handler.h> /* for ux_handler_setup() */
#include <kern/sched_hygiene.h>
#if (DEVELOPMENT || DEBUG)
#include <kern/debug.h>
#endif
#include <mach/vm_param.h>
#include <vm/vm_map.h>
#include <vm/vm_kern_xnu.h>
#include <sys/reboot.h>
#include <dev/busvar.h> /* for pseudo_inits */
#include <sys/kdebug.h>
#include <sys/monotonic.h>
#include <mach/mach_types.h>
#include <mach/vm_prot.h>
#include <mach/semaphore.h>
#include <mach/sync_policy.h>
#include <kern/clock.h>
#include <sys/csr.h>
#include <mach/kern_return.h>
#include <mach/thread_act.h> /* for thread_resume() */
#include <sys/mcache.h> /* for mcache_init() */
#include <sys/mbuf.h> /* for mbinit() */
#include <sys/event.h> /* for knote_init() */
#include <sys/eventhandler.h> /* for eventhandler_init() */
#include <sys/kern_memorystatus.h> /* for memorystatus_init() */
#include <sys/kern_memorystatus_freeze.h> /* for memorystatus_freeze_init() */
#include <sys/aio_kern.h> /* for aio_init() */
#include <sys/semaphore.h> /* for psem_cache_init() */
#include <net/dlil.h> /* for dlil_init() */
#include <net/iptap.h> /* for iptap_init() */
#include <sys/socketvar.h> /* for socketinit() */
#include <sys/protosw.h> /* for domaininit() */
#include <kern/sched_prim.h> /* for thread_wakeup() */
#include <net/if_ether.h> /* for ether_family_init() */
#include <net/if_gif.h> /* for gif_init() */
#include <miscfs/devfs/devfsdefs.h> /* for devfs_kernel_mount() */
#include <vm/vm_kern.h> /* for kmem_suballoc() */
#include <sys/proc_uuid_policy.h> /* proc_uuid_policy_init() */
#include <netinet/flow_divert.h> /* flow_divert_init() */
#include <net/content_filter.h> /* for cfil_init() */
#include <net/necp.h> /* for necp_init() */
#include <net/network_agent.h> /* for netagent_init() */
#include <net/packet_mangler.h> /* for pkt_mnglr_init() */
#include <net/if_utun.h> /* for utun_register_control() */
#include <netinet6/ipsec.h> /* for ipsec_init() */
#include <net/if_redirect.h> /* for if_redirect_init() */
#include <net/netsrc.h> /* for netsrc_init() */
#include <net/ntstat.h> /* for nstat_init() */
#include <netinet/mptcp_var.h> /* for mptcp_control_register() */
#include <net/nwk_wq.h> /* for nwk_wq_init */
#include <net/restricted_in_port.h> /* for restricted_in_port_init() */
#include <net/remote_vif.h> /* for rvi_init() */
#include <net/kctl_test.h> /* for kctl_test_init() */
#include <netinet/kpi_ipfilter_var.h> /* for ipfilter_init() */
#include <kern/assert.h> /* for assert() */
#include <sys/kern_overrides.h> /* for init_system_override() */
#include <sys/lockf.h> /* for lf_init() */
#include <sys/fsctl.h>
#include <net/init.h>
#if CONFIG_MACF
#include <security/mac_framework.h>
#include <security/mac_internal.h> /* mac_init_bsd() */
#include <security/mac_mach_internal.h> /* mac_update_task_label() */
#endif
#include <machine/exec.h>
#if CONFIG_NETBOOT
#include <sys/netboot.h>
#endif
#if CONFIG_IMAGEBOOT
#include <sys/imageboot.h>
#endif
#if PFLOG
#include <net/if_pflog.h>
#endif
#if SKYWALK
#include <skywalk/os_skywalk_private.h>
#endif /* SKYWALK */
#include <pexpert/pexpert.h>
#include <machine/pal_routines.h>
#include <console/video_console.h>
#if CONFIG_XNUPOST
#include <tests/xnupost.h>
#endif
void * get_user_regs(thread_t); /* XXX kludge for <machine/thread.h> */
void IOKitInitializeTime(void); /* XXX */
void IOSleep(unsigned int); /* XXX */
void IOSetImageBoot(void); /* XXX */
void loopattach(void); /* XXX */
void ipc_task_enable(task_t task);
const char *const copyright =
"Copyright (c) 1982, 1986, 1989, 1991, 1993\n\t"
"The Regents of the University of California. "
"All rights reserved.\n\n";
/* Components of the first process -- never freed. */
SECURITY_READ_ONLY_LATE(struct vfs_context) vfs_context0;
static struct plimit limit0;
static struct pstats pstats0;
SECURITY_READ_ONLY_LATE(proc_t) kernproc;
proc_t XNU_PTRAUTH_SIGNED_PTR("initproc") initproc;
long tk_cancc;
long tk_nin;
long tk_nout;
long tk_rawcc;
int lock_trace = 0;
/* Global variables to make pstat happy. We do swapping differently */
int nswdev, nswap;
int nswapmap;
void *swapmap;
struct swdevt swdevt[1];
static LCK_GRP_DECLARE(hostname_lck_grp, "hostname");
LCK_MTX_DECLARE(hostname_lock, &hostname_lck_grp);
LCK_MTX_DECLARE(domainname_lock, &hostname_lck_grp);
dev_t rootdev; /* device of the root */
dev_t dumpdev; /* device to take dumps on */
long dumplo; /* offset into dumpdev */
long hostid;
char hostname[MAXHOSTNAMELEN];
char domainname[MAXDOMNAMELEN];
char rootdevice[DEVMAXNAMESIZE];
struct vnode *rootvp;
bool rootvp_is_ssd = false;
SECURITY_READ_ONLY_LATE(int) boothowto;
/*
* -minimalboot indicates that we want userspace to be bootstrapped to a
* minimal environment. What constitutes minimal is up to the bootstrap
* process.
*/
TUNABLE(int, minimalboot, "-minimalboot", 0);
#if CONFIG_DARKBOOT
int darkboot = 0;
#endif
extern kern_return_t IOFindBSDRoot(char *, unsigned int, dev_t *, u_int32_t *);
extern void IOSecureBSDRoot(const char * rootName);
extern kern_return_t IOKitBSDInit(void );
extern boolean_t IOSetRecoveryBoot(bsd_bootfail_mode_t, uuid_t, boolean_t);
extern void kminit(void);
extern void bsd_bufferinit(void);
extern void throttle_init(void);
vm_map_t bsd_pageable_map;
vm_map_t mb_map;
static int bsd_simul_execs;
static int bsd_pageable_map_size;
__private_extern__ int execargs_cache_size = 0;
__private_extern__ int execargs_free_count = 0;
__private_extern__ vm_offset_t * execargs_cache = NULL;
void bsd_exec_setup(int);
__private_extern__ int bootarg_execfailurereports = 0;
#if __x86_64__
__private_extern__ TUNABLE(int, bootarg_no32exec, "no32exec", 1);
#endif
#if DEVELOPMENT || DEBUG
/* Prevent kernel-based ASLR from being used. */
__private_extern__ TUNABLE(bool, bootarg_disable_aslr, "-disable_aslr", 0);
#endif
/*
* Allow an alternate dyld to be used for testing.
*/
#if DEVELOPMENT || DEBUG
char dyld_alt_path[MAXPATHLEN];
int use_alt_dyld = 0;
char panic_on_proc_crash[NAME_MAX];
int use_panic_on_proc_crash = 0;
char panic_on_proc_exit[NAME_MAX];
int use_panic_on_proc_exit = 0;
char panic_on_proc_spawn_fail[NAME_MAX];
int use_panic_on_proc_spawn_fail = 0;
char dyld_suffix[NAME_MAX];
int use_dyld_suffix = 0;
#endif
#if DEVELOPMENT || DEBUG
__private_extern__ bool bootarg_hide_process_traced = 0;
#endif
int cmask = CMASK;
extern int customnbuf;
kern_return_t bsd_autoconf(void);
void bsd_utaskbootstrap(void);
#if CONFIG_DEV_KMEM
extern void dev_kmem_init(void);
#endif
static void process_name(const char *, proc_t);
static void setconf(void);
#if CONFIG_BASESYSTEMROOT
static int bsd_find_basesystem_dmg(char *bsdmgpath_out, bool *rooted_dmg, bool *skip_signature_check);
static boolean_t bsdmgroot_bootable(void);
#endif // CONFIG_BASESYSTEMROOT
bool bsd_rooted_ramdisk(void);
#if SYSV_SHM
extern void sysv_shm_lock_init(void);
#endif
#if SYSV_SEM
extern void sysv_sem_lock_init(void);
#endif
#if SYSV_MSG
extern void sysv_msg_lock_init(void);
#endif
#if CONFIG_MACF
#if defined (__i386__) || defined (__x86_64__)
/* MACF policy_check configuration flags; see policy_check.c for details */
extern int check_policy_init(int);
#endif
#endif /* CONFIG_MACF */
/* If we are using CONFIG_DTRACE */
#if CONFIG_DTRACE
extern void dtrace_postinit(void);
#endif
/*
* Initialization code.
* Called from cold start routine as
* soon as a stack and segmentation
* have been established.
* Functions:
* turn on clock
* hand craft 0th process
* call all initialization routines
* hand craft 1st user process
*/
/*
* Sets the name for the given task.
*/
static void
process_name(const char *s, proc_t p)
{
strlcpy(p->p_comm, s, sizeof(p->p_comm));
strlcpy(p->p_name, s, sizeof(p->p_name));
}
/* To allow these values to be patched, they're globals here */
#include <machine/vmparam.h>
struct rlimit vm_initial_limit_stack = { .rlim_cur = DFLSSIZ, .rlim_max = MAXSSIZ - PAGE_MAX_SIZE };
struct rlimit vm_initial_limit_data = { .rlim_cur = DFLDSIZ, .rlim_max = MAXDSIZ };
struct rlimit vm_initial_limit_core = { .rlim_cur = DFLCSIZ, .rlim_max = MAXCSIZ };
extern struct os_refgrp rlimit_refgrp;
extern int (*mountroot)(void);
LCK_ATTR_DECLARE(proc_lck_attr, 0, 0);
LCK_GRP_DECLARE(proc_lck_grp, "proc");
LCK_GRP_DECLARE(proc_slock_grp, "proc-slock");
LCK_GRP_DECLARE(proc_fdmlock_grp, "proc-fdmlock");
LCK_GRP_DECLARE(proc_mlock_grp, "proc-mlock");
LCK_GRP_DECLARE(proc_ucred_mlock_grp, "proc-ucred-mlock");
LCK_GRP_DECLARE(proc_dirslock_grp, "proc-dirslock");
LCK_GRP_DECLARE(proc_kqhashlock_grp, "proc-kqhashlock");
LCK_GRP_DECLARE(proc_knhashlock_grp, "proc-knhashlock");
LCK_MTX_DECLARE_ATTR(proc_list_mlock, &proc_mlock_grp, &proc_lck_attr);
#if XNU_TARGET_OS_OSX
/* hook called after root is mounted XXX temporary hack */
void (*mountroot_post_hook)(void);
void (*unmountroot_pre_hook)(void);
#endif
void set_rootvnode(vnode_t);
extern lck_rw_t rootvnode_rw_lock;
SECURITY_READ_ONLY_LATE(struct mach_vm_range) bsd_pageable_range = {};
KMEM_RANGE_REGISTER_DYNAMIC(bsd_pageable, &bsd_pageable_range, ^() {
assert(bsd_pageable_map_size != 0);
return (vm_map_size_t) bsd_pageable_map_size;
});
/* called with an iocount and usecount on new_rootvnode */
void
set_rootvnode(vnode_t new_rootvnode)
{
mount_t new_mount = (new_rootvnode != NULL) ? new_rootvnode->v_mount : NULL;
vnode_t new_devvp = (new_mount != NULL) ? new_mount->mnt_devvp : NULL;
vnode_t old_rootvnode = rootvnode;
new_rootvnode->v_flag |= VROOT;
rootvp = new_devvp;
rootvnode = new_rootvnode;
kernproc->p_fd.fd_cdir = new_rootvnode;
if (new_devvp != NULL) {
rootdev = vnode_specrdev(new_devvp);
} else if (new_mount != NULL) {
rootdev = vfs_statfs(new_mount)->f_fsid.val[0]; /* like ATTR_CMN_DEVID */
} else {
rootdev = NODEV;
}
if (old_rootvnode) {
vnode_rele(old_rootvnode);
}
}
#define RAMDEV "md0"
bool
bsd_rooted_ramdisk(void)
{
bool is_ramdisk = false;
char *dev_path = zalloc(ZV_NAMEI);
if (dev_path == NULL) {
panic("failed to allocate devpath string!");
}
if (PE_parse_boot_argn("rd", dev_path, MAXPATHLEN)) {
if (strncmp(dev_path, RAMDEV, strlen(RAMDEV)) == 0) {
is_ramdisk = true;
}
}
zfree(ZV_NAMEI, dev_path);
return is_ramdisk;
}
/*
* This function is called very early on in the Mach startup, from the
* function start_kernel_threads() in osfmk/kern/startup.c. It's called
* in the context of the current (startup) task using a call to the
* function kernel_thread_create() to jump into start_kernel_threads().
* Internally, kernel_thread_create() calls thread_create_internal(),
* which calls uthread_init(). The function of uthread_init() is
* normally to init a uthread structure, and fill out the uu_sigmask,
* tro_ucred/tro_proc fields. It skips filling these out in the case of the "task"
* being "kernel_task", because the order of operation is inverted. To
* account for that, we need to manually fill in at least the contents
* of the tro_ucred field so that the uthread structure can be
* used like any other.
*/
void
bsd_init(void)
{
struct uthread *ut;
vnode_t init_rootvnode = NULLVP;
struct proc_ro_data kernproc_ro_data = {
.p_csflags = CS_VALID,
};
struct task_ro_data kerntask_ro_data = { };
#if CONFIG_NETBOOT || CONFIG_IMAGEBOOT
boolean_t netboot = FALSE;
#endif
#if (DEVELOPMENT || DEBUG)
platform_stall_panic_or_spin(PLATFORM_STALL_XNU_LOCATION_BSD_INIT);
#endif
#define DEBUG_BSDINIT 0
#if DEBUG_BSDINIT
#define bsd_init_kprintf(x, ...) kprintf("bsd_init: " x, ## __VA_ARGS__)
#else
#define bsd_init_kprintf(x, ...)
#endif
throttle_init();
printf(copyright);
#if CONFIG_DEV_KMEM
bsd_init_kprintf("calling dev_kmem_init\n");
dev_kmem_init();
#endif
/* Initialize kauth subsystem before instancing the first credential */
bsd_init_kprintf("calling kauth_init\n");
kauth_init();
/* kernel_task->proc = kernproc; */
set_bsdtask_info(kernel_task, (void *)kernproc);
/* Set the parent of kernproc to itself */
kernproc->p_pptr = kernproc;
/* Set the state to SRUN */
kernproc->p_stat = SRUN;
/* Set the proc flags */
#if defined(__LP64__)
kernproc->p_flag = P_SYSTEM | P_LP64;
#else
kernproc->p_flag = P_SYSTEM;
#endif
kernproc->p_nice = NZERO;
TAILQ_INIT(&kernproc->p_uthlist);
/* set the cred */
kauth_cred_set(&kernproc_ro_data.p_ucred.__smr_ptr, vfs_context0.vc_ucred);
kernproc->p_proc_ro = proc_ro_alloc(kernproc, &kernproc_ro_data,
kernel_task, &kerntask_ro_data);
/* give kernproc a name */
bsd_init_kprintf("calling process_name\n");
process_name("kernel_task", kernproc);
/* Allocate proc lock attribute */
lck_mtx_init(&kernproc->p_mlock, &proc_mlock_grp, &proc_lck_attr);
lck_mtx_init(&kernproc->p_ucred_mlock, &proc_ucred_mlock_grp, &proc_lck_attr);
#if CONFIG_AUDIT
lck_mtx_init(&kernproc->p_audit_mlock, &proc_ucred_mlock_grp, &proc_lck_attr);
#endif /* CONFIG_AUDIT */
lck_spin_init(&kernproc->p_slock, &proc_slock_grp, &proc_lck_attr);
/* Init the file descriptor table. */
fdt_init(kernproc);
kernproc->p_fd.fd_cmask = (mode_t)cmask;
assert(bsd_simul_execs != 0);
execargs_cache_size = bsd_simul_execs;
execargs_free_count = bsd_simul_execs;
execargs_cache = zalloc_permanent(bsd_simul_execs * sizeof(vm_offset_t),
ZALIGN(vm_offset_t));
if (current_task() != kernel_task) {
printf("bsd_init: We have a problem, "
"current task is not kernel task\n");
}
bsd_init_kprintf("calling get_bsdthread_info\n");
ut = current_uthread();
#if CONFIG_MACF
/*
* Initialize the MAC Framework
*/
mac_policy_initbsd();
#if defined (__i386__) || defined (__x86_64__)
/*
* We currently only support this on i386/x86_64, as that is the
* only lock code we have instrumented so far.
*/
int policy_check_flags;
PE_parse_boot_argn("policy_check", &policy_check_flags, sizeof(policy_check_flags));
check_policy_init(policy_check_flags);
#endif
#endif /* MAC */
/*
* Make a session and group
*
* No need to hold the pgrp lock,
* there are no other BSD threads yet.
*/
struct session *session0 = session_alloc(kernproc);
struct pgrp *pgrp0 = pgrp_alloc(0, PGRP_REF_NONE);
session0->s_ttypgrpid = 0;
pgrp0->pg_session = session0;
/*
* Create process 0.
*/
proc_list_lock();
os_ref_init_mask(&kernproc->p_refcount, P_REF_BITS, &p_refgrp, P_REF_NONE);
os_ref_init_raw(&kernproc->p_waitref, &p_refgrp);
proc_ref_hold_proc_task_struct(kernproc);
/*
* Make a group and session, then simulate pinsertchild(),
* adjusted for the kernel.
*/
pghash_insert_locked(pgrp0);
LIST_INSERT_HEAD(&pgrp0->pg_members, kernproc, p_pglist);
smr_init_store(&kernproc->p_pgrp, pgrp0);
LIST_INSERT_HEAD(&allproc, kernproc, p_list);
LIST_INSERT_HEAD(SESSHASH(0), session0, s_hash);
proc_list_unlock();
proc_set_task(kernproc, kernel_task);
#if DEVELOPMENT || DEBUG
if (bootarg_disable_aslr) {
kernproc->p_flag |= P_DISABLE_ASLR;
}
#endif
TAILQ_INSERT_TAIL(&kernproc->p_uthlist, ut, uu_list);
/*
* Officially associate the kernel with vfs_context0.vc_ucred.
*/
#if CONFIG_MACF
mac_cred_label_associate_kernel(vfs_context0.vc_ucred);
#endif
proc_update_creds_onproc(kernproc, vfs_context0.vc_ucred);
TAILQ_INIT(&kernproc->p_aio_activeq);
TAILQ_INIT(&kernproc->p_aio_doneq);
kernproc->p_aio_total_count = 0;
/* Create the limits structures. */
for (uint32_t i = 0; i < ARRAY_COUNT(limit0.pl_rlimit); i++) {
limit0.pl_rlimit[i].rlim_cur =
limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
}
limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE;
limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = maxprocperuid;
limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
limit0.pl_rlimit[RLIMIT_STACK] = vm_initial_limit_stack;
limit0.pl_rlimit[RLIMIT_DATA] = vm_initial_limit_data;
limit0.pl_rlimit[RLIMIT_CORE] = vm_initial_limit_core;
os_ref_init_count(&limit0.pl_refcnt, &rlimit_refgrp, 1);
smr_init_store(&kernproc->p_limit, &limit0);
kernproc->p_stats = &pstats0;
kernproc->p_subsystem_root_path = NULL;
/*
* Charge root for one process: launchd.
*/
bsd_init_kprintf("calling chgproccnt\n");
(void)chgproccnt(0, 1);
/*
* Allocate a kernel submap for pageable memory
* for temporary copying (execve()).
*/
bsd_init_kprintf("calling kmem_suballoc\n");
bsd_pageable_map = kmem_suballoc(kernel_map,
&bsd_pageable_range.min_address,
(vm_size_t)bsd_pageable_map_size,
VM_MAP_CREATE_PAGEABLE,
VM_FLAGS_FIXED | VM_FLAGS_OVERWRITE,
KMS_PERMANENT | KMS_NOFAIL,
VM_KERN_MEMORY_BSD).kmr_submap;
/*
* Initialize buffers and hash links for buffers
*
* SIDE EFFECT: Starts a thread for bcleanbuf_thread(), so must
* happen after a credential has been associated with
* the kernel task.
*/
bsd_init_kprintf("calling bsd_bufferinit\n");
bsd_bufferinit();
/*
* Initialize the calendar.
*/
bsd_init_kprintf("calling IOKitInitializeTime\n");
IOKitInitializeTime();
/* Initialize the file systems. */
bsd_init_kprintf("calling vfsinit\n");
vfsinit();
#if CONFIG_PROC_UUID_POLICY
/* Initial proc_uuid_policy subsystem */
bsd_init_kprintf("calling proc_uuid_policy_init()\n");
proc_uuid_policy_init();
#endif
#if SOCKETS
#if CONFIG_MBUF_MCACHE
/* Initialize per-CPU cache allocator */
mcache_init();
#endif /* CONFIG_MBUF_MCACHE */
/* Initialize mbuf's. */
bsd_init_kprintf("calling mbinit\n");
mbinit();
restricted_in_port_init();
#endif /* SOCKETS */
/*
* Initializes security event auditing.
* XXX: Should/could this occur later?
*/
#if CONFIG_AUDIT
bsd_init_kprintf("calling audit_init\n");
audit_init();
#endif
/* Initialize kqueues */
bsd_init_kprintf("calling knote_init\n");
knote_init();
/* Initialize event handler */
bsd_init_kprintf("calling eventhandler_init\n");
eventhandler_init();
/* Initialize for async IO */
bsd_init_kprintf("calling aio_init\n");
aio_init();
pthread_init();
/* POSIX Shm and Sem */
bsd_init_kprintf("calling pshm_cache_init\n");
pshm_cache_init();
bsd_init_kprintf("calling psem_cache_init\n");
psem_cache_init();
/*
* Initialize protocols. Block reception of incoming packets
* until everything is ready.
*/
#if NETWORKING
bsd_init_kprintf("calling nwk_wq_init\n");
nwk_wq_init();
bsd_init_kprintf("calling dlil_init\n");
dlil_init();
#endif /* NETWORKING */
#if SOCKETS
bsd_init_kprintf("calling socketinit\n");
socketinit();
bsd_init_kprintf("calling domaininit\n");
domaininit();
iptap_init();
#if FLOW_DIVERT
flow_divert_init();
#endif /* FLOW_DIVERT */
#endif /* SOCKETS */
#if SKYWALK
bsd_init_kprintf("calling skywalk_init\n");
(void) skywalk_init();
#endif /* SKYWALK */
#if NETWORKING
#if NECP
/* Initialize Network Extension Control Policies */
necp_init();
#endif
netagent_init();
#endif /* NETWORKING */
#if CONFIG_FREEZE
#ifndef CONFIG_MEMORYSTATUS
#error "CONFIG_FREEZE defined without matching CONFIG_MEMORYSTATUS"
#endif
/* Initialise background freezing */
bsd_init_kprintf("calling memorystatus_freeze_init\n");
memorystatus_freeze_init();
#endif
#if CONFIG_MEMORYSTATUS
/* Initialize kernel memory status notifications */
bsd_init_kprintf("calling memorystatus_init\n");
memorystatus_init();
/* Fixup memorystatus fields of the kernel process (only for logging purposes) */
kernproc->p_memstat_state |= P_MEMSTAT_INTERNAL;
kernproc->p_memstat_effectivepriority = JETSAM_PRIORITY_INTERNAL;
kernproc->p_memstat_requestedpriority = JETSAM_PRIORITY_INTERNAL;
#endif /* CONFIG_MEMORYSTATUS */
bsd_init_kprintf("calling sysctl_mib_init\n");
sysctl_mib_init();
bsd_init_kprintf("calling bsd_autoconf\n");
bsd_autoconf();
#if CONFIG_DTRACE
dtrace_postinit();
#endif
/*
* We attach the loopback interface *way* down here to ensure
* it happens after autoconf(), otherwise it becomes the
* "primary" interface.
*/
#include <loop.h>
#if NLOOP > 0
bsd_init_kprintf("calling loopattach\n");
loopattach(); /* XXX */
#endif
#if NGIF
/* Initialize gif interface (after lo0) */
gif_init();
#endif
#if PFLOG
/* Initialize packet filter log interface */
pfloginit();
#endif /* PFLOG */
#if NETHER > 0
/* Register the built-in dlil ethernet interface family */
bsd_init_kprintf("calling ether_family_init\n");
ether_family_init();
#endif /* ETHER */
#if NETWORKING
#if CONTENT_FILTER
cfil_init();
#endif
#if PACKET_MANGLER
pkt_mnglr_init();
#endif
/*
* Register subsystems with kernel control handlers
*/
utun_register_control();
#if IPSEC
ipsec_init();
#endif /* IPSEC */
netsrc_init();
nstat_init();
#if MPTCP
mptcp_control_register();
#endif /* MPTCP */
#if REMOTE_VIF
rvi_init();
#endif /* REMOTE_VIF */
#if IF_REDIRECT
if_redirect_init();
#endif /* REDIRECT */
#if KCTL_TEST
kctl_test_init();
#endif /* KCTL_TEST */
/*
* The the networking stack is now initialized so it is a good time to call
* the clients that are waiting for the networking stack to be usable.
*/
bsd_init_kprintf("calling net_init_run\n");
net_init_run();
#endif /* NETWORKING */
bsd_init_kprintf("calling inittodr\n");
inittodr(0);
/* Mount the root file system. */
while (TRUE) {
int err;
bsd_init_kprintf("calling setconf\n");
setconf();
#if CONFIG_NETBOOT
netboot = (mountroot == netboot_mountroot);
#endif
bsd_init_kprintf("vfs_mountroot\n");
if (0 == (err = vfs_mountroot())) {
break;
}
rootdevice[0] = '\0';
#if CONFIG_NETBOOT
if (netboot) {
PE_display_icon( 0, "noroot"); /* XXX a netboot-specific icon would be nicer */
vc_progress_set(FALSE, 0);
for (uint32_t i = 1; 1; i *= 2) {
printf("bsd_init: failed to mount network root, error %d, %s\n",
err, PE_boot_args());
printf("We are hanging here...\n");
IOSleep(i * 60 * 1000);
}
/*NOTREACHED*/
}
#endif
printf("cannot mount root, errno = %d\n", err);
}
IOSecureBSDRoot(rootdevice);
mountlist.tqh_first->mnt_flag |= MNT_ROOTFS;
bsd_init_kprintf("calling VFS_ROOT\n");
/* Get the vnode for '/'. Set fdp->fd_fd.fd_cdir to reference it. */
if (VFS_ROOT(mountlist.tqh_first, &init_rootvnode, vfs_context_kernel())) {
panic("bsd_init: cannot find root vnode: %s", PE_boot_args());
}
(void)vnode_ref(init_rootvnode);
(void)vnode_put(init_rootvnode);
lck_rw_lock_exclusive(&rootvnode_rw_lock);
set_rootvnode(init_rootvnode);
lck_rw_unlock_exclusive(&rootvnode_rw_lock);
init_rootvnode = NULLVP; /* use rootvnode after this point */
if (!bsd_rooted_ramdisk()) {
boolean_t require_rootauth = FALSE;
#if XNU_TARGET_OS_OSX && defined(__arm64__)
#if CONFIG_IMAGEBOOT
/* Apple Silicon MacOS */
require_rootauth = !imageboot_desired();
#endif // CONFIG_IMAGEBOOT
#elif !XNU_TARGET_OS_OSX
/* Non MacOS */
require_rootauth = TRUE;
#endif // XNU_TARGET_OS_OSX && defined(__arm64__)
if (require_rootauth) {
/* enforce sealedness */
int autherr = VNOP_IOCTL(rootvnode, FSIOC_KERNEL_ROOTAUTH, NULL, 0, vfs_context_kernel());
if (autherr) {
panic("rootvp not authenticated after mounting");
}
}
}
#if CONFIG_NETBOOT
if (netboot) {
int err;
netboot = TRUE;
/* post mount setup */
if ((err = netboot_setup()) != 0) {
PE_display_icon( 0, "noroot"); /* XXX a netboot-specific icon would be nicer */
vc_progress_set(FALSE, 0);
for (uint32_t i = 1; 1; i *= 2) {
printf("bsd_init: NetBoot could not find root, error %d: %s\n",
err, PE_boot_args());
printf("We are hanging here...\n");
IOSleep(i * 60 * 1000);
}
/*NOTREACHED*/
}
}
#endif
#if CONFIG_IMAGEBOOT
/*
* See if a system disk image is present. If so, mount it and
* switch the root vnode to point to it
*/
imageboot_type_t imageboot_type = imageboot_needed();
if (netboot == FALSE && imageboot_type) {
/*
* An image was found. No turning back: we're booted
* with a kernel from the disk image.
*/
bsd_init_kprintf("doing image boot: type = %d\n", imageboot_type);
imageboot_setup(imageboot_type);
IOSetImageBoot();
}
#endif /* CONFIG_IMAGEBOOT */
/* set initial time; all other resource data is already zero'ed */
microtime_with_abstime(&kernproc->p_start, &kernproc->p_stats->ps_start);
#if DEVFS
{
char mounthere[] = "/dev"; /* !const because of internal casting */
bsd_init_kprintf("calling devfs_kernel_mount\n");
devfs_kernel_mount(mounthere);
}
#endif /* DEVFS */
#if CONFIG_BASESYSTEMROOT
#if CONFIG_IMAGEBOOT
if (bsdmgroot_bootable()) {
int error;
bool rooted_dmg = false;
bool skip_signature_check = false;
printf("trying to find and mount BaseSystem dmg as root volume\n");
#if DEVELOPMENT || DEBUG
printf("(set boot-arg -nobsdmgroot to avoid this)\n");
#endif // DEVELOPMENT || DEBUG
char *dmgpath = NULL;
dmgpath = zalloc_flags(ZV_NAMEI, Z_ZERO | Z_WAITOK | Z_NOFAIL);
error = bsd_find_basesystem_dmg(dmgpath, &rooted_dmg, &skip_signature_check);
if (error) {
bsd_init_kprintf("failed to to find BaseSystem dmg: error = %d\n", error);
} else {
PE_parse_boot_argn("bsdmgpath", dmgpath, sizeof(dmgpath));
bsd_init_kprintf("found BaseSystem dmg at: %s\n", dmgpath);
error = imageboot_pivot_image(dmgpath, IMAGEBOOT_DMG, "/System/Volumes/BaseSystem", "System/Volumes/macOS", rooted_dmg, skip_signature_check);
if (error) {
bsd_init_kprintf("couldn't mount BaseSystem dmg: error = %d", error);
} else {
IOSetImageBoot();
}
}
zfree(ZV_NAMEI, dmgpath);
}
#else /* CONFIG_IMAGEBOOT */
#error CONFIG_BASESYSTEMROOT requires CONFIG_IMAGEBOOT
#endif /* CONFIG_IMAGEBOOT */
#endif /* CONFIG_BASESYSTEMROOT */
/* Initialize signal state for process 0. */
bsd_init_kprintf("calling siginit\n");
siginit(kernproc);
bsd_init_kprintf("calling bsd_utaskbootstrap\n");
bsd_utaskbootstrap();
pal_kernel_announce();
bsd_init_kprintf("calling mountroot_post_hook\n");
#if XNU_TARGET_OS_OSX
/* invoke post-root-mount hook */
if (mountroot_post_hook != NULL) {
mountroot_post_hook();
}
#endif
#if 0 /* not yet */
consider_zone_gc(FALSE);
#endif
#if DEVELOPMENT || DEBUG
/*
* At this point, we consider the kernel "booted" enough to apply
* stricter timeouts. Only used for debug timeouts.
*/
machine_timeout_bsd_init();
#endif /* DEVELOPMENT || DEBUG */
bsd_init_kprintf("done\n");
}
void
bsdinit_task(void)
{
proc_t p = current_proc();
process_name("init", p);
/* Set up exception-to-signal reflection */
ux_handler_setup();
#if CONFIG_MACF
mac_cred_label_associate_user(proc_ucred_unsafe(p)); /* in init */
#endif
vm_init_before_launchd();
#if CONFIG_XNUPOST
int result = bsd_list_tests();
result = bsd_do_post();
if (result != 0) {
panic("bsd_do_post: Tests failed with result = 0x%08x", result);
}
#endif
bsd_init_kprintf("bsd_do_post - done");
load_init_program(p);
lock_trace = 1;
}
kern_return_t
bsd_autoconf(void)
{
kprintf("bsd_autoconf: calling kminit\n");
kminit();
/*
* Early startup for bsd pseudodevices.
*/
{
struct pseudo_init *pi;
for (pi = pseudo_inits; pi->ps_func; pi++) {
(*pi->ps_func)(pi->ps_count);
}
}
return IOKitBSDInit();
}
#include <sys/disklabel.h> /* for MAXPARTITIONS */
static void
setconf(void)
{
u_int32_t flags;
kern_return_t err;
err = IOFindBSDRoot(rootdevice, sizeof(rootdevice), &rootdev, &flags);
if (err) {
printf("setconf: IOFindBSDRoot returned an error (%d);"
"setting rootdevice to 'sd0a'.\n", err); /* XXX DEBUG TEMP */
rootdev = makedev( 6, 0 );
strlcpy(rootdevice, "sd0a", sizeof(rootdevice));
flags = 0;
}
#if CONFIG_NETBOOT
if (flags & 1) {
/* network device */
mountroot = netboot_mountroot;
} else {
#endif
/* otherwise have vfs determine root filesystem */
mountroot = NULL;
#if CONFIG_NETBOOT
}
#endif
}
/*
* Boot into the flavor of Recovery dictated by `mode`.
*/
boolean_t
bsd_boot_to_recovery(bsd_bootfail_mode_t mode, uuid_t volume_uuid, boolean_t reboot)
{
return IOSetRecoveryBoot(mode, volume_uuid, reboot);
}
void
bsd_utaskbootstrap(void)
{
thread_t thread;
struct uthread *ut;
/*
* Clone the bootstrap process from the kernel process, without
* inheriting either task characteristics or memory from the kernel;
*/
thread = cloneproc(TASK_NULL, NULL, kernproc, CLONEPROC_INITPROC);
/* Hold the reference as it will be dropped during shutdown */
initproc = proc_find(1);
#if __PROC_INTERNAL_DEBUG
if (initproc == PROC_NULL) {
panic("bsd_utaskbootstrap: initproc not set");
}
#endif
zalloc_first_proc_made();
/*
* Since we aren't going back out the normal way to our parent,
* we have to drop the transition locks explicitly.
*/
proc_signalend(initproc, 0);
proc_transend(initproc, 0);
ut = (struct uthread *)get_bsdthread_info(thread);
ut->uu_sigmask = 0;
act_set_astbsd(thread);
ipc_task_enable(get_threadtask(thread));
task_clear_return_wait(get_threadtask(thread), TCRW_CLEAR_ALL_WAIT);
}
static void
parse_bsd_args(void)
{
char namep[48];
if (PE_parse_boot_argn("-s", namep, sizeof(namep))) {
boothowto |= RB_SINGLE;
}
if (PE_parse_boot_argn("-x", namep, sizeof(namep))) { /* safe boot */
boothowto |= RB_SAFEBOOT;
}
if (PE_parse_boot_argn("nbuf", &max_nbuf_headers,
sizeof(max_nbuf_headers))) {
customnbuf = 1;
}
#if CONFIG_DARKBOOT
/*
* The darkboot flag is specified by the bootloader and is stored in
* boot_args->bootFlags. This flag is available starting revision 2.
*/
boot_args *args = (boot_args *) PE_state.bootArgs;
if ((args != NULL) && (args->Revision >= kBootArgsRevision2)) {
darkboot = (args->bootFlags & kBootFlagsDarkBoot) ? 1 : 0;
} else {
darkboot = 0;
}
#endif
#if DEVELOPMENT || DEBUG
if (PE_parse_boot_argn("dyldsuffix", dyld_suffix, sizeof(dyld_suffix))) {
if (strlen(dyld_suffix) > 0) {
use_dyld_suffix = 1;
}
}
if (PE_parse_boot_argn("alt-dyld", dyld_alt_path, sizeof(dyld_alt_path))) {
if (strlen(dyld_alt_path) > 0) {
use_alt_dyld = 1;
}
}
if (PE_parse_boot_arg_str("panic-on-proc-crash", panic_on_proc_crash, sizeof(panic_on_proc_crash))) {
if (strlen(panic_on_proc_crash) > 0) {
use_panic_on_proc_crash = 1;
}
}
if (PE_parse_boot_arg_str("panic-on-proc-exit", panic_on_proc_exit, sizeof(panic_on_proc_exit))) {
if (strlen(panic_on_proc_exit) > 0) {
use_panic_on_proc_exit = 1;
}
}
if (PE_parse_boot_arg_str("panic-on-proc-spawn-fail", panic_on_proc_spawn_fail, sizeof(panic_on_proc_spawn_fail))) {
if (strlen(panic_on_proc_spawn_fail) > 0) {
use_panic_on_proc_spawn_fail = 1;
}
}
if (PE_i_can_has_debugger(NULL) && PE_parse_boot_argn("-hide_process_traced", namep, sizeof(namep))) {
bootarg_hide_process_traced = 1;
}
#endif /* DEVELOPMENT || DEBUG */
}
STARTUP(TUNABLES, STARTUP_RANK_MIDDLE, parse_bsd_args);
#if CONFIG_BASESYSTEMROOT
extern bool IOGetBootUUID(char *);
extern bool IOGetApfsPrebootUUID(char *);
// This function returns the UUID of the Preboot (and Recovery) folder associated with the
// current boot volume, if applicable. The meaning of the UUID can be
// filesystem-dependent and not all kinds of boots will have a UUID.
// On success, the UUID is copied into the past-in parameter and TRUE is returned.
// In case the current boot has no applicable Preboot UUID, FALSE is returned.
static bool
get_preboot_uuid(uuid_string_t maybe_uuid_string)
{
// try IOGetApfsPrebootUUID
if (IOGetApfsPrebootUUID(maybe_uuid_string)) {
uuid_t maybe_uuid;
int error = uuid_parse(maybe_uuid_string, maybe_uuid);
if (error == 0) {
return true;
}
}
// try IOGetBootUUID
if (IOGetBootUUID(maybe_uuid_string)) {
uuid_t maybe_uuid;
int error = uuid_parse(maybe_uuid_string, maybe_uuid);
if (error == 0) {
return true;
}
}
// didn't find it
return false;
}
#if defined(__arm64__)
extern bool IOGetBootObjectsPath(char *);
#endif
// Find the BaseSystem.dmg to be used as the initial root volume during certain
// kinds of boots.
// This may mount volumes and lookup vnodes.
// The DEVELOPMENT kernel will look for BaseSystem.rooted.dmg first.
// If it returns 0 (no error), then it also writes the absolute path to the
// BaseSystem.dmg into its argument (which must be a char[MAXPATHLEN]).
static
int
bsd_find_basesystem_dmg(char *bsdmgpath_out, bool *rooted_dmg, bool *skip_signature_check)
{
int error;
size_t len;
char *dmgbasepath;
char *dmgpath;
bool allow_rooted_dmg = false;
dmgbasepath = zalloc_flags(ZV_NAMEI, Z_ZERO | Z_WAITOK);
dmgpath = zalloc_flags(ZV_NAMEI, Z_ZERO | Z_WAITOK);
vnode_t imagevp = NULLVP;
#if DEVELOPMENT || DEBUG
allow_rooted_dmg = true;
#endif
//must provide output bool
if (rooted_dmg && skip_signature_check) {
*rooted_dmg = false;
*skip_signature_check = false;
} else {
error = EINVAL;
goto done;
}
error = vfs_mount_recovery();
if (error) {
goto done;
}
len = strlcpy(dmgbasepath, "/System/Volumes/Recovery/", MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
if (csr_check(CSR_ALLOW_ANY_RECOVERY_OS) == 0) {
*skip_signature_check = true;
allow_rooted_dmg = true;
}
#if defined(__arm64__)
char boot_obj_path[MAXPATHLEN] = "";
if (IOGetBootObjectsPath(boot_obj_path)) {
if (boot_obj_path[0] == '/') {
dmgbasepath[len - 1] = '\0';
}
len = strlcat(dmgbasepath, boot_obj_path, MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
len = strlcat(dmgbasepath, "/usr/standalone/firmware/", MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
if (allow_rooted_dmg) {
len = strlcpy(dmgpath, dmgbasepath, MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
len = strlcat(dmgpath, "arm64eBaseSystem.rooted.dmg", MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
error = vnode_lookup(dmgpath, 0, &imagevp, vfs_context_kernel());
if (error == 0) {
*rooted_dmg = true;
*skip_signature_check = true;
goto done;
}
memset(dmgpath, 0, MAXPATHLEN);
}
len = strlcpy(dmgpath, dmgbasepath, MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
len = strlcat(dmgpath, "arm64eBaseSystem.dmg", MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
error = vnode_lookup(dmgpath, 0, &imagevp, vfs_context_kernel());
if (error == 0) {
goto done;
}
memset(dmgpath, 0, MAXPATHLEN);
dmgbasepath[strlen("/System/Volumes/Recovery/")] = '\0';
}
#endif // __arm64__
uuid_string_t preboot_uuid;
if (!get_preboot_uuid(preboot_uuid)) {
// no preboot? bail out
return EINVAL;
}
len = strlcat(dmgbasepath, preboot_uuid, MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
if (allow_rooted_dmg) {
// Try BaseSystem.rooted.dmg
len = strlcpy(dmgpath, dmgbasepath, MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
len = strlcat(dmgpath, "/BaseSystem.rooted.dmg", MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
error = vnode_lookup(dmgpath, 0, &imagevp, vfs_context_kernel());
if (error == 0) {
// we found it! success!
*rooted_dmg = true;
*skip_signature_check = true;
goto done;
}
}
// Try BaseSystem.dmg
len = strlcpy(dmgpath, dmgbasepath, MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
len = strlcat(dmgpath, "/BaseSystem.dmg", MAXPATHLEN);
if (len > MAXPATHLEN) {
error = ENAMETOOLONG;
goto done;
}
error = vnode_lookup(dmgpath, 0, &imagevp, vfs_context_kernel());
if (error == 0) {
// success!
goto done;
}
done:
if (error == 0) {
strlcpy(bsdmgpath_out, dmgpath, MAXPATHLEN);
} else {
bsd_init_kprintf("%s: error %d\n", __func__, error);
}
if (imagevp != NULLVP) {
vnode_put(imagevp);
}
zfree(ZV_NAMEI, dmgpath);
zfree(ZV_NAMEI, dmgbasepath);
return error;
}
static boolean_t
bsdmgroot_bootable(void)
{
#if defined(__arm64__)
#define BSDMGROOT_DEFAULT true
#else
#define BSDMGROOT_DEFAULT false
#endif
boolean_t resolved = BSDMGROOT_DEFAULT;
boolean_t boot_arg_bsdmgroot = false;
boolean_t boot_arg_nobsdmgroot = false;
int error;
mount_t mp;
boolean_t root_part_of_volume_group = false;
struct vfs_attr vfsattr;
mp = rootvnode->v_mount;
VFSATTR_INIT(&vfsattr);
VFSATTR_WANTED(&vfsattr, f_capabilities);
boot_arg_bsdmgroot = PE_parse_boot_argn("-bsdmgroot", NULL, 0);
boot_arg_nobsdmgroot = PE_parse_boot_argn("-nobsdmgroot", NULL, 0);
error = vfs_getattr(mp, &vfsattr, vfs_context_kernel());
if (!error && VFSATTR_IS_SUPPORTED(&vfsattr, f_capabilities)) {
if ((vfsattr.f_capabilities.capabilities[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_VOL_GROUPS) &&
(vfsattr.f_capabilities.valid[VOL_CAPABILITIES_FORMAT] & VOL_CAP_FMT_VOL_GROUPS)) {
root_part_of_volume_group = true;
}
}
boolean_t singleuser = (boothowto & RB_SINGLE) != 0;
// Start with the #defined default above.
// If booting to single-user mode, default to false, because single-
// user mode inside the BaseSystem is probably not what's wanted.
// If the 'yes' boot-arg is set, we'll allow that even in single-user
// mode, we'll assume you know what you're doing.
// The 'no' boot-arg overpowers the 'yes' boot-arg.
// In any case, we will not attempt to root from BaseSystem if the
// original (booter-chosen) root volume isn't in a volume group.
// This is just out of an abundance of caution: if the boot environment
// seems to be "something other than a standard install",
// we'll be conservative in messing with the root volume.
if (singleuser) {
resolved = false;
}
if (boot_arg_bsdmgroot) {
resolved = true;
}
if (boot_arg_nobsdmgroot) {
resolved = false;
}
if (!root_part_of_volume_group) {
resolved = false;
}
return resolved;
}
#endif // CONFIG_BASESYSTEMROOT
void
bsd_exec_setup(int scale)
{
switch (scale) {
case 0:
case 1:
bsd_simul_execs = BSD_SIMUL_EXECS;
break;
case 2:
case 3:
bsd_simul_execs = 65;
break;
case 4:
case 5:
bsd_simul_execs = 129;
break;
case 6:
case 7:
bsd_simul_execs = 257;
break;
default:
bsd_simul_execs = 513;
break;
}
bsd_pageable_map_size = (bsd_simul_execs * BSD_PAGEABLE_SIZE_PER_EXEC);
}
#if !CONFIG_NETBOOT
int
netboot_root(void);
int
netboot_root(void)
{
return 0;
}
#endif