/*
- * Copyright (c) 2000-2019 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2020 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <sys/vnode_internal.h>
#include <sys/conf.h>
#include <sys/buf_internal.h>
-#include <sys/clist.h>
#include <sys/user.h>
#include <sys/time.h>
#include <sys/systm.h>
#include <kern/thread.h>
#include <kern/task.h>
#include <kern/ast.h>
-#include <kern/kalloc.h>
+#include <kern/zalloc.h>
#include <kern/ux_handler.h> /* for ux_handler_setup() */
#include <mach/vm_param.h>
#include <dev/busvar.h> /* for pseudo_inits */
#include <sys/kdebug.h>
#include <sys/monotonic.h>
-#include <sys/reason.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/ubc_internal.h> /* for ubc_init() */
#include <sys/mcache.h> /* for mcache_init() */
#include <sys/mbuf.h> /* for mbinit() */
#include <sys/event.h> /* for knote_init() */
#include <net/dlil.h> /* for dlil_init() */
#include <net/kpi_protocol.h> /* for proto_kpi_init() */
#include <net/iptap.h> /* for iptap_init() */
-#include <sys/pipe.h> /* for pipeinit() */
#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 <vm/vm_protos.h> /* for vnode_pager_bootstrap() */
#include <miscfs/devfs/devfsdefs.h> /* for devfs_kernel_mount() */
#include <vm/vm_kern.h> /* for kmem_suballoc() */
-#include <sys/semaphore.h> /* for psem_lock_init() */
#include <sys/msgbuf.h> /* for log_setsize() */
-#include <sys/tty.h> /* for tty_init() */
#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 <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>
void IOSleep(unsigned int); /* XXX */
void loopattach(void); /* XXX */
-const char copyright[] =
+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. */
-struct proc proc0;
+struct proc proc0 = { .p_comm = "kernel_task", .p_name = "kernel_task" };
struct session session0;
struct pgrp pgrp0;
struct filedesc filedesc0;
struct plimit limit0;
struct pstats pstats0;
struct sigacts sigacts0;
-proc_t kernproc;
-proc_t initproc;
+SECURITY_READ_ONLY_LATE(proc_t) kernproc = &proc0;
+proc_t XNU_PTRAUTH_SIGNED_PTR("initproc") initproc;
long tk_cancc;
long tk_nin;
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];
-lck_mtx_t hostname_lock;
-lck_grp_t *hostname_lck_grp;
char domainname[MAXDOMNAMELEN];
-lck_mtx_t domainname_lock;
-
-char rootdevice[DEVMAXNAMESIZE];
-
-#if KMEMSTATS
-struct kmemstats kmemstats[M_LAST];
-#endif
+char rootdevice[DEVMAXNAMESIZE];
struct vnode *rootvp;
+bool rootvp_is_ssd = false;
int boothowto;
int minimalboot = 0;
-#if CONFIG_EMBEDDED
+#if CONFIG_DARKBOOT
int darkboot = 0;
#endif
__private_extern__ int proc_ref_tracking_disabled = 0; /* disable panics on leaked proc refs across syscall boundary */
#endif
-#if OS_REASON_DEBUG
-__private_extern__ int os_reason_debug_disabled = 0; /* disable asserts for when we fail to allocate OS reasons */
-#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 file_lock_init(void);
-extern void kmeminit(void);
extern void bsd_bufferinit(void);
extern void oslog_setsize(int size);
extern void throttle_init(void);
-extern void acct_init(void);
#if CONFIG_LOCKERBOOT
#define LOCKER_PROTOBOOT_MOUNT "/protoboot"
const char *pbdevpath);
#endif
-extern int serverperfmode;
extern int ncl;
#if DEVELOPMENT || DEBUG
extern int syscallfilter_disable;
__private_extern__ int bootarg_disable_aslr = 0;
#endif
+
/*
* Allow an alternate dyld to be used for testing.
*/
#if CONFIG_DEV_KMEM
extern void dev_kmem_init(void);
#endif
-extern void time_zone_slock_init(void);
extern void select_waitq_init(void);
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
+
+static bool bsd_rooted_ramdisk(void);
+
#if SYSV_SHM
extern void sysv_shm_lock_init(void);
#endif
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 thread_t cloneproc(task_t, coalition_t, proc_t, int, int);
extern int (*mountroot)(void);
-lck_grp_t * proc_lck_grp;
-lck_grp_t * proc_slock_grp;
-lck_grp_t * proc_fdmlock_grp;
-lck_grp_t * proc_kqhashlock_grp;
-lck_grp_t * proc_knhashlock_grp;
-lck_grp_t * proc_ucred_mlock_grp;
-lck_grp_t * proc_mlock_grp;
-lck_grp_attr_t * proc_lck_grp_attr;
-lck_attr_t * proc_lck_attr;
-lck_mtx_t * proc_list_mlock;
-lck_mtx_t * proc_klist_mlock;
+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");
-#if CONFIG_XNUPOST
-lck_grp_t * sysctl_debug_test_stackshot_owner_grp;
-lck_mtx_t * sysctl_debug_test_stackshot_owner_init_mtx;
-#endif /* !CONFIG_XNUPOST */
-extern lck_mtx_t * execargs_cache_lock;
+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);
-/*
- * This function is called before IOKit initialization, so that globals
- * like the sysctl tree are initialized before kernel extensions
- * are started (since they may want to register sysctls
- */
+extern lck_rw_t rootvnode_rw_lock;
+
+/* called with an iocount and usecount on new_rootvnode */
void
-bsd_early_init(void)
+set_rootvnode(vnode_t new_rootvnode)
{
- sysctl_early_init();
+ 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;
+ filedesc0.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! \n");
+ }
+
+ 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;
}
/*
kern_return_t ret;
struct ucred temp_cred;
struct posix_cred temp_pcred;
+ vnode_t init_rootvnode = NULLVP;
#if CONFIG_NETBOOT || CONFIG_IMAGEBOOT
boolean_t netboot = FALSE;
#endif
char *pbdevp = NULL;
char pbdevpath[64];
char pbfsname[MFSNAMELEN];
- char *slash_dev = NULL;
+ const char *slash_dev = NULL;
#endif
#define DEBUG_BSDINIT 0
printf(copyright);
- bsd_init_kprintf("calling kmeminit\n");
- kmeminit();
-
bsd_init_kprintf("calling parse_bsd_args\n");
parse_bsd_args();
bsd_init_kprintf("calling procinit\n");
procinit();
- /* Initialize the ttys (MUST be before kminit()/bsd_autoconf()!)*/
- tty_init();
-
- kernproc = &proc0; /* implicitly bzero'ed */
-
/* kernel_task->proc = kernproc; */
set_bsdtask_info(kernel_task, (void *)kernproc);
bsd_init_kprintf("calling process_name\n");
process_name("kernel_task", kernproc);
- /* allocate proc lock group attribute and group */
- bsd_init_kprintf("calling lck_grp_attr_alloc_init\n");
- proc_lck_grp_attr = lck_grp_attr_alloc_init();
-
- proc_lck_grp = lck_grp_alloc_init("proc", proc_lck_grp_attr);
-
- proc_slock_grp = lck_grp_alloc_init("proc-slock", proc_lck_grp_attr);
- proc_ucred_mlock_grp = lck_grp_alloc_init("proc-ucred-mlock", proc_lck_grp_attr);
- proc_mlock_grp = lck_grp_alloc_init("proc-mlock", proc_lck_grp_attr);
- proc_fdmlock_grp = lck_grp_alloc_init("proc-fdmlock", proc_lck_grp_attr);
- proc_kqhashlock_grp = lck_grp_alloc_init("proc-kqhashlock", proc_lck_grp_attr);
- proc_knhashlock_grp = lck_grp_alloc_init("proc-knhashlock", proc_lck_grp_attr);
-#if CONFIG_XNUPOST
- sysctl_debug_test_stackshot_owner_grp = lck_grp_alloc_init("test-stackshot-owner-grp", LCK_GRP_ATTR_NULL);
- sysctl_debug_test_stackshot_owner_init_mtx = lck_mtx_alloc_init(
- sysctl_debug_test_stackshot_owner_grp,
- LCK_ATTR_NULL);
-#endif /* !CONFIG_XNUPOST */
/* Allocate proc lock attribute */
- proc_lck_attr = lck_attr_alloc_init();
- proc_list_mlock = lck_mtx_alloc_init(proc_mlock_grp, proc_lck_attr);
- proc_klist_mlock = lck_mtx_alloc_init(proc_mlock_grp, proc_lck_attr);
- lck_mtx_init(&kernproc->p_mlock, proc_mlock_grp, proc_lck_attr);
- lck_mtx_init(&kernproc->p_fdmlock, proc_fdmlock_grp, proc_lck_attr);
- lck_mtx_init(&kernproc->p_ucred_mlock, proc_ucred_mlock_grp, proc_lck_attr);
- lck_spin_init(&kernproc->p_slock, proc_slock_grp, proc_lck_attr);
+ lck_mtx_init(&kernproc->p_mlock, &proc_mlock_grp, &proc_lck_attr);
+ lck_mtx_init(&kernproc->p_fdmlock, &proc_fdmlock_grp, &proc_lck_attr);
+ lck_mtx_init(&kernproc->p_ucred_mlock, &proc_ucred_mlock_grp, &proc_lck_attr);
+ lck_spin_init(&kernproc->p_slock, &proc_slock_grp, &proc_lck_attr);
+ lck_rw_init(&kernproc->p_dirs_lock, &proc_dirslock_grp, &proc_lck_attr);
assert(bsd_simul_execs != 0);
- execargs_cache_lock = lck_mtx_alloc_init(proc_lck_grp, proc_lck_attr);
execargs_cache_size = bsd_simul_execs;
execargs_free_count = bsd_simul_execs;
- execargs_cache = (vm_offset_t *)kalloc(bsd_simul_execs * sizeof(vm_offset_t));
- bzero(execargs_cache, bsd_simul_execs * sizeof(vm_offset_t));
+ 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, "
ulock_initialize();
- hostname_lck_grp = lck_grp_alloc_init("hostname", LCK_GRP_ATTR_NULL);
- lck_mtx_init(&hostname_lock, hostname_lck_grp, LCK_ATTR_NULL);
- lck_mtx_init(&domainname_lock, hostname_lck_grp, LCK_ATTR_NULL);
-
/*
* Create process 0.
*/
kernproc->p_pgrp = &pgrp0;
LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
LIST_INIT(&pgrp0.pg_members);
- lck_mtx_init(&pgrp0.pg_mlock, proc_mlock_grp, proc_lck_attr);
+ lck_mtx_init(&pgrp0.pg_mlock, &proc_mlock_grp, &proc_lck_attr);
/* There is no other bsd thread this point and is safe without pgrp lock */
LIST_INSERT_HEAD(&pgrp0.pg_members, kernproc, p_pglist);
kernproc->p_listflag |= P_LIST_INPGRP;
session0.s_count = 1;
session0.s_leader = kernproc;
session0.s_listflags = 0;
- lck_mtx_init(&session0.s_mlock, proc_mlock_grp, proc_lck_attr);
+ lck_mtx_init(&session0.s_mlock, &proc_mlock_grp, &proc_lck_attr);
LIST_INSERT_HEAD(SESSHASH(0), &session0, s_hash);
proc_list_unlock();
ut->uu_context.vc_ucred = kernproc->p_ucred;
ut->uu_context.vc_thread = current_thread();
+ vfs_set_context_kernel(&ut->uu_context);
+
TAILQ_INIT(&kernproc->p_aio_activeq);
TAILQ_INIT(&kernproc->p_aio_doneq);
kernproc->p_aio_total_count = 0;
- kernproc->p_aio_active_count = 0;
-
- bsd_init_kprintf("calling file_lock_init\n");
- file_lock_init();
#if CONFIG_MACF
mac_cred_label_associate_kernel(kernproc->p_ucred);
/* Create the file descriptor table. */
kernproc->p_fd = &filedesc0;
- filedesc0.fd_cmask = cmask;
+ filedesc0.fd_cmask = (mode_t)cmask;
filedesc0.fd_knlistsize = 0;
filedesc0.fd_knlist = NULL;
filedesc0.fd_knhash = NULL;
filedesc0.fd_knhashmask = 0;
- lck_mtx_init(&filedesc0.fd_kqhashlock, proc_kqhashlock_grp, proc_lck_attr);
- lck_mtx_init(&filedesc0.fd_knhashlock, proc_knhashlock_grp, proc_lck_attr);
+ lck_mtx_init(&filedesc0.fd_kqhashlock, &proc_kqhashlock_grp, &proc_lck_attr);
+ lck_mtx_init(&filedesc0.fd_knhashlock, &proc_knhashlock_grp, &proc_lck_attr);
/* Create the limits structures. */
kernproc->p_limit = &limit0;
- for (i = 0; i < sizeof(kernproc->p_rlimit) / sizeof(kernproc->p_rlimit[0]); i++) {
+ for (i = 0; i < sizeof(kernproc->p_limit->pl_rlimit) / sizeof(kernproc->p_limit->pl_rlimit[0]); i++) {
limit0.pl_rlimit[i].rlim_cur =
limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
}
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;
- limit0.pl_refcnt = 1;
+ os_ref_init_count(&limit0.pl_refcnt, &rlimit_refgrp, 1);
kernproc->p_stats = &pstats0;
kernproc->p_sigacts = &sigacts0;
+ kernproc->p_subsystem_root_path = NULL;
/*
* Charge root for one process: launchd.
}
}
- bsd_init_kprintf("calling fpxlog_init\n");
- fpxlog_init();
-
/*
* Initialize buffers and hash links for buffers
*
bsd_init_kprintf("calling IOKitInitializeTime\n");
IOKitInitializeTime();
- bsd_init_kprintf("calling ubc_init\n");
- ubc_init();
-
/* Initialize the file systems. */
bsd_init_kprintf("calling vfsinit\n");
vfsinit();
- /* Initialize file locks. */
- bsd_init_kprintf("calling lf_init\n");
- lf_init();
-
#if CONFIG_PROC_UUID_POLICY
/* Initial proc_uuid_policy subsystem */
bsd_init_kprintf("calling proc_uuid_policy_init()\n");
bsd_init_kprintf("calling aio_init\n");
aio_init();
- /* Initialize pipes */
- bsd_init_kprintf("calling pipeinit\n");
- pipeinit();
-
- /* Initialize SysV shm subsystem locks; the subsystem proper is
- * initialized through a sysctl.
- */
-#if SYSV_SHM
- bsd_init_kprintf("calling sysv_shm_lock_init\n");
- sysv_shm_lock_init();
-#endif
-#if SYSV_SEM
- bsd_init_kprintf("calling sysv_sem_lock_init\n");
- sysv_sem_lock_init();
-#endif
-#if SYSV_MSG
- bsd_init_kprintf("sysv_msg_lock_init\n");
- sysv_msg_lock_init();
-#endif
- bsd_init_kprintf("calling pshm_lock_init\n");
- pshm_lock_init();
- bsd_init_kprintf("calling psem_lock_init\n");
- psem_lock_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();
- bsd_init_kprintf("calling time_zone_slock_init\n");
- time_zone_slock_init();
bsd_init_kprintf("calling select_waitq_init\n");
select_waitq_init();
flow_divert_init();
#endif /* FLOW_DIVERT */
#endif /* SOCKETS */
+#if NETWORKING
+#if NECP
+ /* Initialize Network Extension Control Policies */
+ necp_init();
+#endif
+ netagent_init();
+#endif /* NETWORKING */
kernproc->p_fd->fd_cdir = NULL;
kernproc->p_fd->fd_rdir = NULL;
+#if defined (__x86_64__) && (DEBUG || DEVELOPMENT)
+ hvg_bsd_init();
+#endif /* DEBUG || DEVELOPMENT */
+
#if CONFIG_FREEZE
#ifndef CONFIG_MEMORYSTATUS
#error "CONFIG_FREEZE defined without matching CONFIG_MEMORYSTATUS"
memorystatus_init();
#endif /* CONFIG_MEMORYSTATUS */
- bsd_init_kprintf("calling acct_init\n");
- acct_init();
-
bsd_init_kprintf("calling sysctl_mib_init\n");
sysctl_mib_init();
bsd_init_kprintf("calling bsd_autoconf\n");
bsd_autoconf();
- bsd_init_kprintf("calling os_reason_init\n");
- os_reason_init();
-
#if CONFIG_DTRACE
dtrace_postinit();
#endif
#endif /* ETHER */
#if NETWORKING
- /* Call any kext code that wants to run just after network init */
- bsd_init_kprintf("calling net_init_run\n");
- net_init_run();
-
#if CONTENT_FILTER
cfil_init();
#endif
pkt_mnglr_init();
#endif
-#if NECP
- /* Initialize Network Extension Control Policies */
- necp_init();
-#endif
-
- netagent_init();
-
- /* register user tunnel kernel control handler */
+ /*
+ * Register subsystems with kernel control handlers
+ */
utun_register_control();
#if IPSEC
ipsec_register_control();
#if MPTCP
mptcp_control_register();
#endif /* MPTCP */
-#endif /* NETWORKING */
- bsd_init_kprintf("calling vnode_pager_bootstrap\n");
- vnode_pager_bootstrap();
+ /*
+ * 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);
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, &rootvnode, &context)) {
+ if (VFS_ROOT(mountlist.tqh_first, &init_rootvnode, &context)) {
panic("bsd_init: cannot find root vnode: %s", PE_boot_args());
}
- rootvnode->v_flag |= VROOT;
- (void)vnode_ref(rootvnode);
- (void)vnode_put(rootvnode);
- filedesc0.fd_cdir = rootvnode;
+ (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()) {
+#if CONFIG_IMAGEBOOT
+#if XNU_TARGET_OS_OSX && defined(__arm64__)
+ /* Apple Silicon MacOS */
+ if (!imageboot_desired()) {
+ /* enforce sealedness */
+ int autherr = VNOP_IOCTL(rootvnode, FSIOC_KERNEL_ROOTAUTH, NULL, 0, vfs_context_kernel());
+ if (autherr) {
+ panic("rootvp not authenticated after mounting \n");
+ }
+ }
+#endif // TARGET_OS_OSX && arm64
+#endif // config_imageboot
+ /* Otherwise, noop */
+ }
+
#if CONFIG_NETBOOT
if (netboot) {
strlcpy(pbfsname, pbmnt->mnt_vtable->vfc_name, sizeof(pbfsname));
#endif
+
/*
* See if a system disk image is present. If so, mount it and
* switch the root vnode to point to it
}
#endif /* DEVFS */
- if (vfs_mount_rosv_data()) {
- panic("failed to mount data volume!");
- }
+#if CONFIG_BASESYSTEMROOT
+#if CONFIG_IMAGEBOOT
+ if (bsdmgroot_bootable()) {
+ int error;
+ bool rooted_dmg = false;
+ bool skip_signature_check = false;
- if (vfs_mount_vm()) {
- printf("failed to mount vm volume!");
+ 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);
+ if (dmgpath == NULL) {
+ panic("%s: M_NAMEI zone exhausted", __FUNCTION__);
+ }
+
+ 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);
+ }
+ }
+ zfree(ZV_NAMEI, dmgpath);
}
+#else /* CONFIG_IMAGEBOOT */
+#error CONFIG_BASESYSTEMROOT requires CONFIG_IMAGEBOOT
+#endif /* CONFIG_IMAGEBOOT */
+#endif /* CONFIG_BASESYSTEMROOT */
#if CONFIG_LOCKERBOOT
/*
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
- /* Initialize System Override call */
- init_system_override();
-
bsd_init_kprintf("done\n");
}
#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)
{
panic("bsd_utaskbootstrap: initproc not set\n");
}
#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.
}
#endif
+
+
PE_parse_boot_argn("ncl", &ncl, sizeof(ncl));
if (PE_parse_boot_argn("nbuf", &max_nbuf_headers,
sizeof(max_nbuf_headers))) {
bootarg_no_vnode_drain = 1;
}
-#if CONFIG_EMBEDDED
+#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.
}
#endif
-#if OS_REASON_DEBUG
- if (PE_parse_boot_argn("-disable_osreason_debug", namep, sizeof(namep))) {
- os_reason_debug_disabled = 1;
- }
-#endif
-
PE_parse_boot_argn("sigrestrict", &sigrestrict_arg, sizeof(sigrestrict_arg));
#if DEVELOPMENT || DEBUG
#endif /* DEVELOPMENT || DEBUG */
}
+#if CONFIG_BASESYSTEMROOT
+
+extern const char* IOGetBootUUID(void);
+extern const char* IOGetApfsPrebootUUID(void);
+
+// Get 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.
+// If available, the string will be returned. It does not need to be
+// deallocate. (Future: if we need to return the string as a copy that the
+// caller must free, we'll introduce a new functcion for that.)
+// NULL will be returned if the current boot has no applicable Preboot UUID.
+static
+const char *
+get_preboot_uuid(void)
+{
+ const char *maybe_uuid_string;
+
+ // try IOGetApfsPrebootUUID
+ maybe_uuid_string = IOGetApfsPrebootUUID();
+ if (maybe_uuid_string) {
+ uuid_t maybe_uuid;
+ int error = uuid_parse(maybe_uuid_string, maybe_uuid);
+ if (error == 0) {
+ return maybe_uuid_string;
+ }
+ }
+
+ // try IOGetBootUUID
+ maybe_uuid_string = IOGetBootUUID();
+ if (maybe_uuid_string) {
+ uuid_t maybe_uuid;
+ int error = uuid_parse(maybe_uuid_string, maybe_uuid);
+ if (error == 0) {
+ return maybe_uuid_string;
+ }
+ }
+
+ // didn't find it
+ return NULL;
+}
+
+#if defined(__arm64__)
+extern const char *IOGetBootObjectsPath(void);
+#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__)
+ const char *boot_obj_path = IOGetBootObjectsPath();
+ if (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__
+
+ const char *preboot_uuid = get_preboot_uuid();
+ if (preboot_uuid == NULL) {
+ // 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)
{
projects / apple / xnu.git / blobdiff