2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 2010 Marcel Moolenaar
5 * Copyright (c) 1999-2004 Poul-Henning Kamp
6 * Copyright (c) 1999 Michael Smith
7 * Copyright (c) 1989, 1993
8 * The Regents of the University of California. All rights reserved.
9 * (c) UNIX System Laboratories, Inc.
10 * All or some portions of this file are derived from material licensed
11 * to the University of California by American Telephone and Telegraph
12 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
13 * the permission of UNIX System Laboratories, Inc.
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 * 3. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 #include "opt_rootdevname.h"
42 #include <sys/cdefs.h>
43 __FBSDID("$FreeBSD$");
45 #include <sys/param.h>
48 #include <sys/fcntl.h>
50 #include <sys/kernel.h>
51 #include <sys/malloc.h>
52 #include <sys/mdioctl.h>
53 #include <sys/mount.h>
54 #include <sys/mutex.h>
55 #include <sys/namei.h>
58 #include <sys/filedesc.h>
59 #include <sys/reboot.h>
62 #include <sys/syscallsubr.h>
63 #include <sys/sysproto.h>
65 #include <sys/sysctl.h>
66 #include <sys/sysent.h>
67 #include <sys/systm.h>
68 #include <sys/vnode.h>
70 #include <geom/geom.h>
73 * The root filesystem is detailed in the kernel environment variable
74 * vfs.root.mountfrom, which is expected to be in the general format
76 * <vfsname>:[<path>][ <vfsname>:[<path>] ...]
77 * vfsname := the name of a VFS known to the kernel and capable
78 * of being mounted as root
79 * path := disk device name or other data used by the filesystem
80 * to locate its physical store
82 * If the environment variable vfs.root.mountfrom is a space separated list,
83 * each list element is tried in turn and the root filesystem will be mounted
84 * from the first one that succeeds.
86 * The environment variable vfs.root.mountfrom.options is a comma delimited
87 * set of string mount options. These mount options must be parseable
88 * by nmount() in the kernel.
91 static int parse_mount(char **);
92 static struct mntarg *parse_mountroot_options(struct mntarg *, const char *);
93 static int sysctl_vfs_root_mount_hold(SYSCTL_HANDLER_ARGS);
94 static void vfs_mountroot_wait(void);
95 static int vfs_mountroot_wait_if_neccessary(const char *fs, const char *dev);
98 * The vnode of the system's root (/ in the filesystem, without chroot
101 struct vnode *rootvnode;
104 * Mount of the system's /dev.
106 struct mount *rootdevmp;
108 char *rootdevnames[2] = {NULL, NULL};
110 struct mtx root_holds_mtx;
111 MTX_SYSINIT(root_holds, &root_holds_mtx, "root_holds", MTX_DEF);
113 struct root_hold_token {
115 LIST_ENTRY(root_hold_token) list;
118 static LIST_HEAD(, root_hold_token) root_holds =
119 LIST_HEAD_INITIALIZER(root_holds);
128 static enum action root_mount_onfail = A_CONTINUE;
130 static int root_mount_mddev;
131 static int root_mount_complete;
133 /* By default wait up to 3 seconds for devices to appear. */
134 static int root_mount_timeout = 3;
135 TUNABLE_INT("vfs.mountroot.timeout", &root_mount_timeout);
137 static int root_mount_always_wait = 0;
138 SYSCTL_INT(_vfs, OID_AUTO, root_mount_always_wait, CTLFLAG_RDTUN,
139 &root_mount_always_wait, 0,
140 "Wait for root mount holds even if the root device already exists");
142 SYSCTL_PROC(_vfs, OID_AUTO, root_mount_hold,
143 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
144 NULL, 0, sysctl_vfs_root_mount_hold, "A",
145 "List of root mount hold tokens");
148 sysctl_vfs_root_mount_hold(SYSCTL_HANDLER_ARGS)
151 struct root_hold_token *h;
154 sbuf_new(&sb, NULL, 256, SBUF_AUTOEXTEND | SBUF_INCLUDENUL);
156 mtx_lock(&root_holds_mtx);
157 LIST_FOREACH(h, &root_holds, list) {
158 if (h != LIST_FIRST(&root_holds))
160 sbuf_printf(&sb, "%s", h->who);
162 mtx_unlock(&root_holds_mtx);
164 error = sbuf_finish(&sb);
166 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
171 struct root_hold_token *
172 root_mount_hold(const char *identifier)
174 struct root_hold_token *h;
176 h = malloc(sizeof *h, M_DEVBUF, M_ZERO | M_WAITOK);
178 mtx_lock(&root_holds_mtx);
179 TSHOLD("root mount");
180 LIST_INSERT_HEAD(&root_holds, h, list);
181 mtx_unlock(&root_holds_mtx);
186 root_mount_rel(struct root_hold_token *h)
192 mtx_lock(&root_holds_mtx);
193 LIST_REMOVE(h, list);
194 TSRELEASE("root mount");
196 mtx_unlock(&root_holds_mtx);
204 /* No mutex is acquired here because int stores are atomic. */
205 return (root_mount_complete);
213 if (VFS_ROOT(TAILQ_FIRST(&mountlist), LK_EXCLUSIVE, &rootvnode))
214 panic("set_rootvnode: Cannot find root vnode");
216 VOP_UNLOCK(rootvnode, 0);
218 p = curthread->td_proc;
219 FILEDESC_XLOCK(p->p_fd);
221 if (p->p_fd->fd_cdir != NULL)
222 vrele(p->p_fd->fd_cdir);
223 p->p_fd->fd_cdir = rootvnode;
226 if (p->p_fd->fd_rdir != NULL)
227 vrele(p->p_fd->fd_rdir);
228 p->p_fd->fd_rdir = rootvnode;
231 FILEDESC_XUNLOCK(p->p_fd);
235 vfs_mountroot_devfs(struct thread *td, struct mount **mpp)
237 struct vfsoptlist *opts;
238 struct vfsconf *vfsp;
244 if (rootdevmp != NULL) {
246 * Already have /dev; this happens during rerooting.
248 error = vfs_busy(rootdevmp, 0);
253 vfsp = vfs_byname("devfs");
254 KASSERT(vfsp != NULL, ("Could not find devfs by name"));
258 mp = vfs_mount_alloc(NULLVP, vfsp, "/dev", td->td_ucred);
260 error = VFS_MOUNT(mp);
261 KASSERT(error == 0, ("VFS_MOUNT(devfs) failed %d", error));
265 opts = malloc(sizeof(struct vfsoptlist), M_MOUNT, M_WAITOK);
269 mtx_lock(&mountlist_mtx);
270 TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
271 mtx_unlock(&mountlist_mtx);
279 error = kern_symlinkat(td, "/", AT_FDCWD, "dev", UIO_SYSSPACE);
281 printf("kern_symlink /dev -> / returns %d\n", error);
287 vfs_mountroot_shuffle(struct thread *td, struct mount *mpdevfs)
290 struct mount *mporoot, *mpnroot;
291 struct vnode *vp, *vporoot, *vpdevfs;
295 mpnroot = TAILQ_NEXT(mpdevfs, mnt_list);
297 /* Shuffle the mountlist. */
298 mtx_lock(&mountlist_mtx);
299 mporoot = TAILQ_FIRST(&mountlist);
300 TAILQ_REMOVE(&mountlist, mpdevfs, mnt_list);
301 if (mporoot != mpdevfs) {
302 TAILQ_REMOVE(&mountlist, mpnroot, mnt_list);
303 TAILQ_INSERT_HEAD(&mountlist, mpnroot, mnt_list);
305 TAILQ_INSERT_TAIL(&mountlist, mpdevfs, mnt_list);
306 mtx_unlock(&mountlist_mtx);
308 cache_purgevfs(mporoot, true);
309 if (mporoot != mpdevfs)
310 cache_purgevfs(mpdevfs, true);
312 if (VFS_ROOT(mporoot, LK_EXCLUSIVE, &vporoot))
313 panic("vfs_mountroot_shuffle: Cannot find root vnode");
316 vporoot->v_iflag &= ~VI_MOUNT;
318 vporoot->v_mountedhere = NULL;
319 mporoot->mnt_flag &= ~MNT_ROOTFS;
320 mporoot->mnt_vnodecovered = NULL;
323 /* Set up the new rootvnode, and purge the cache */
324 mpnroot->mnt_vnodecovered = NULL;
326 cache_purgevfs(rootvnode->v_mount, true);
328 if (mporoot != mpdevfs) {
329 /* Remount old root under /.mount or /mnt */
331 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
335 NDFREE(&nd, NDF_ONLY_PNBUF);
337 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
343 error = (vp->v_type == VDIR) ? 0 : ENOTDIR;
345 error = vinvalbuf(vp, V_SAVE, 0, 0);
348 mporoot->mnt_vnodecovered = vp;
349 vp->v_mountedhere = mporoot;
350 strlcpy(mporoot->mnt_stat.f_mntonname,
356 NDFREE(&nd, NDF_ONLY_PNBUF);
359 printf("mountroot: unable to remount previous root "
360 "under /.mount or /mnt (error %d)\n", error);
363 /* Remount devfs under /dev */
364 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, "/dev", td);
368 error = (vp->v_type == VDIR) ? 0 : ENOTDIR;
370 error = vinvalbuf(vp, V_SAVE, 0, 0);
372 vpdevfs = mpdevfs->mnt_vnodecovered;
373 if (vpdevfs != NULL) {
374 cache_purge(vpdevfs);
375 vpdevfs->v_mountedhere = NULL;
378 mpdevfs->mnt_vnodecovered = vp;
379 vp->v_mountedhere = mpdevfs;
385 printf("mountroot: unable to remount devfs under /dev "
386 "(error %d)\n", error);
387 NDFREE(&nd, NDF_ONLY_PNBUF);
389 if (mporoot == mpdevfs) {
391 /* Unlink the no longer needed /dev/dev -> / symlink */
392 error = kern_funlinkat(td, AT_FDCWD, "/dev/dev", FD_NONE,
395 printf("mountroot: unable to unlink /dev/dev "
396 "(error %d)\n", error);
401 * Configuration parser.
404 /* Parser character classes. */
405 #define CC_WHITESPACE -1
406 #define CC_NONWHITESPACE -2
413 parse_peek(char **conf)
420 parse_poke(char **conf, int c)
427 parse_advance(char **conf)
434 parse_skipto(char **conf, int mc)
439 c = parse_peek(conf);
444 match = (c == ' ' || c == '\t' || c == '\n') ? 1 : 0;
446 case CC_NONWHITESPACE:
449 match = (c != ' ' && c != '\t') ? 1 : 0;
452 match = (c == mc) ? 1 : 0;
463 parse_token(char **conf, char **tok)
470 error = parse_skipto(conf, CC_NONWHITESPACE);
474 error = parse_skipto(conf, CC_WHITESPACE);
476 *tok = malloc(len + 1, M_TEMP, M_WAITOK | M_ZERO);
482 parse_dir_ask_printenv(const char *var)
486 val = kern_getenv(var);
488 printf(" %s=%s\n", var, val);
494 parse_dir_ask(char **conf)
500 vfs_mountroot_wait();
502 printf("\nLoader variables:\n");
503 parse_dir_ask_printenv("vfs.root.mountfrom");
504 parse_dir_ask_printenv("vfs.root.mountfrom.options");
506 printf("\nManual root filesystem specification:\n");
507 printf(" <fstype>:<device> [options]\n");
508 printf(" Mount <device> using filesystem <fstype>\n");
509 printf(" and with the specified (optional) option list.\n");
511 printf(" eg. ufs:/dev/da0s1a\n");
512 printf(" zfs:zroot/ROOT/default\n");
513 printf(" cd9660:/dev/cd0 ro\n");
514 printf(" (which is equivalent to: ");
515 printf("mount -t cd9660 -o ro /dev/cd0 /)\n");
517 printf(" ? List valid disk boot devices\n");
518 printf(" . Yield 1 second (for background tasks)\n");
519 printf(" <empty line> Abort manual input\n");
523 printf("\nmountroot> ");
524 cngets(name, sizeof(name), GETS_ECHO);
527 if (name[0] == '?' && name[1] == '\0') {
528 printf("\nList of GEOM managed disk devices:\n ");
532 if (name[0] == '.' && name[1] == '\0') {
537 error = parse_mount(&mnt);
539 printf("Invalid file system specification.\n");
540 } while (error != 0);
546 parse_dir_md(char **conf)
550 struct md_ioctl *mdio;
556 error = parse_token(conf, &tok);
561 mdio = malloc(sizeof(*mdio) + len + 1, M_TEMP, M_WAITOK | M_ZERO);
562 path = (void *)(mdio + 1);
563 bcopy(tok, path, len);
566 /* Get file status. */
567 error = kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &sb, NULL);
571 /* Open /dev/mdctl so that we can attach/detach. */
572 error = kern_openat(td, AT_FDCWD, "/dev/" MDCTL_NAME, UIO_SYSSPACE,
577 fd = td->td_retval[0];
578 mdio->md_version = MDIOVERSION;
579 mdio->md_type = MD_VNODE;
581 if (root_mount_mddev != -1) {
582 mdio->md_unit = root_mount_mddev;
583 (void)kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio);
584 /* Ignore errors. We don't care. */
585 root_mount_mddev = -1;
588 mdio->md_file = (void *)(mdio + 1);
589 mdio->md_options = MD_AUTOUNIT | MD_READONLY;
590 mdio->md_mediasize = sb.st_size;
592 error = kern_ioctl(td, fd, MDIOCATTACH, (void *)mdio);
596 if (mdio->md_unit > 9) {
597 printf("rootmount: too many md units\n");
598 mdio->md_file = NULL;
599 mdio->md_options = 0;
600 mdio->md_mediasize = 0;
601 error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio);
602 /* Ignore errors. We don't care. */
607 root_mount_mddev = mdio->md_unit;
608 printf(MD_NAME "%u attached to %s\n", root_mount_mddev, mdio->md_file);
610 error = kern_close(td, fd);
618 parse_dir_onfail(char **conf)
623 error = parse_token(conf, &action);
627 if (!strcmp(action, "continue"))
628 root_mount_onfail = A_CONTINUE;
629 else if (!strcmp(action, "panic"))
630 root_mount_onfail = A_PANIC;
631 else if (!strcmp(action, "reboot"))
632 root_mount_onfail = A_REBOOT;
633 else if (!strcmp(action, "retry"))
634 root_mount_onfail = A_RETRY;
636 printf("rootmount: %s: unknown action\n", action);
640 free(action, M_TEMP);
645 parse_dir_timeout(char **conf)
651 error = parse_token(conf, &tok);
655 secs = strtol(tok, &endtok, 0);
656 error = (secs < 0 || *endtok != '\0') ? EINVAL : 0;
658 root_mount_timeout = secs;
664 parse_directive(char **conf)
669 error = parse_token(conf, &dir);
673 if (strcmp(dir, ".ask") == 0)
674 error = parse_dir_ask(conf);
675 else if (strcmp(dir, ".md") == 0)
676 error = parse_dir_md(conf);
677 else if (strcmp(dir, ".onfail") == 0)
678 error = parse_dir_onfail(conf);
679 else if (strcmp(dir, ".timeout") == 0)
680 error = parse_dir_timeout(conf);
682 printf("mountroot: invalid directive `%s'\n", dir);
683 /* Ignore the rest of the line. */
684 (void)parse_skipto(conf, '\n');
692 parse_mount_dev_present(const char *dev)
697 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, dev, curthread);
701 NDFREE(&nd, NDF_ONLY_PNBUF);
702 return (error != 0) ? 0 : 1;
707 parse_mount(char **conf)
711 char *dev, *fs, *opts, *tok;
712 int delay, error, timeout;
714 error = parse_token(conf, &tok);
718 error = parse_skipto(&tok, ':');
723 parse_poke(&tok, '\0');
727 if (root_mount_mddev != -1) {
728 /* Handle substitution for the md unit number. */
729 tok = strstr(dev, "md#");
731 tok[2] = '0' + root_mount_mddev;
735 error = parse_token(conf, &tok);
736 opts = (error == 0) ? tok : NULL;
738 printf("Trying to mount root from %s:%s [%s]...\n", fs, dev,
739 (opts != NULL) ? opts : "");
741 errmsg = malloc(ERRMSGL, M_TEMP, M_WAITOK | M_ZERO);
743 if (vfs_byname(fs) == NULL) {
744 strlcpy(errmsg, "unknown file system", ERRMSGL);
749 error = vfs_mountroot_wait_if_neccessary(fs, dev);
754 timeout = root_mount_timeout * hz;
758 ma = mount_arg(ma, "fstype", fs, -1);
759 ma = mount_arg(ma, "fspath", "/", -1);
760 ma = mount_arg(ma, "from", dev, -1);
761 ma = mount_arg(ma, "errmsg", errmsg, ERRMSGL);
762 ma = mount_arg(ma, "ro", NULL, 0);
763 ma = parse_mountroot_options(ma, opts);
765 error = kernel_mount(ma, MNT_ROOTFS);
766 if (error == 0 || timeout <= 0)
769 if (root_mount_timeout * hz == timeout ||
770 (bootverbose && timeout % hz == 0)) {
771 printf("Mounting from %s:%s failed with error %d; "
772 "retrying for %d more second%s\n", fs, dev, error,
773 timeout / hz, (timeout / hz > 1) ? "s" : "");
775 pause("rmretry", delay);
780 printf("Mounting from %s:%s failed with error %d",
782 if (errmsg[0] != '\0')
783 printf(": %s", errmsg);
787 free(errmsg, M_TEMP);
790 /* kernel_mount can return -1 on error. */
791 return ((error < 0) ? EDOOFUS : error);
796 vfs_mountroot_parse(struct sbuf *sb, struct mount *mpdevfs)
802 root_mount_mddev = -1;
805 conf = sbuf_data(sb);
806 mp = TAILQ_NEXT(mpdevfs, mnt_list);
807 error = (mp == NULL) ? 0 : EDOOFUS;
808 root_mount_onfail = A_CONTINUE;
810 error = parse_skipto(&conf, CC_NONWHITESPACE);
811 if (error == PE_EOL) {
812 parse_advance(&conf);
817 switch (parse_peek(&conf)) {
819 error = parse_skipto(&conf, '\n');
822 error = parse_directive(&conf);
825 error = parse_mount(&conf);
827 printf("mountroot: invalid file system "
835 /* Ignore any trailing garbage on the line. */
836 if (parse_peek(&conf) != '\n') {
837 printf("mountroot: advancing to next directive...\n");
838 (void)parse_skipto(&conf, '\n');
840 mp = TAILQ_NEXT(mpdevfs, mnt_list);
846 * We failed to mount (a new) root.
848 switch (root_mount_onfail) {
852 panic("mountroot: unable to (re-)mount root.");
857 kern_reboot(RB_NOSYNC);
865 vfs_mountroot_conf0(struct sbuf *sb)
867 char *s, *tok, *mnt, *opt;
870 sbuf_printf(sb, ".onfail panic\n");
871 sbuf_printf(sb, ".timeout %d\n", root_mount_timeout);
872 if (boothowto & RB_ASKNAME)
873 sbuf_printf(sb, ".ask\n");
875 if (boothowto & RB_DFLTROOT)
876 sbuf_printf(sb, "%s\n", ROOTDEVNAME);
878 if (boothowto & RB_CDROM) {
879 sbuf_printf(sb, "cd9660:/dev/cd0 ro\n");
880 sbuf_printf(sb, ".timeout 0\n");
881 sbuf_printf(sb, "cd9660:/dev/cd1 ro\n");
882 sbuf_printf(sb, ".timeout %d\n", root_mount_timeout);
884 s = kern_getenv("vfs.root.mountfrom");
886 opt = kern_getenv("vfs.root.mountfrom.options");
888 error = parse_token(&tok, &mnt);
890 sbuf_printf(sb, "%s %s\n", mnt,
891 (opt != NULL) ? opt : "");
893 error = parse_token(&tok, &mnt);
899 if (rootdevnames[0] != NULL)
900 sbuf_printf(sb, "%s\n", rootdevnames[0]);
901 if (rootdevnames[1] != NULL)
902 sbuf_printf(sb, "%s\n", rootdevnames[1]);
904 if (!(boothowto & RB_DFLTROOT))
905 sbuf_printf(sb, "%s\n", ROOTDEVNAME);
907 if (!(boothowto & RB_ASKNAME))
908 sbuf_printf(sb, ".ask\n");
912 vfs_mountroot_readconf(struct thread *td, struct sbuf *sb)
914 static char buf[128];
918 int error, flags, len;
920 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/.mount.conf", td);
922 error = vn_open(&nd, &flags, 0, NULL);
926 NDFREE(&nd, NDF_ONLY_PNBUF);
928 len = sizeof(buf) - 1;
930 error = vn_rdwr(UIO_READ, nd.ni_vp, buf, len, ofs,
931 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred,
937 buf[len - resid] = 0;
938 sbuf_printf(sb, "%s", buf);
942 VOP_UNLOCK(nd.ni_vp, 0);
943 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
948 vfs_mountroot_wait(void)
950 struct root_hold_token *h;
951 struct timeval lastfail;
959 mtx_lock(&root_holds_mtx);
960 if (LIST_EMPTY(&root_holds)) {
961 mtx_unlock(&root_holds_mtx);
964 if (ppsratecheck(&lastfail, &curfail, 1)) {
965 printf("Root mount waiting for:");
966 LIST_FOREACH(h, &root_holds, list)
967 printf(" %s", h->who);
970 TSWAIT("root mount");
971 msleep(&root_holds, &root_holds_mtx, PZERO | PDROP, "roothold",
973 TSUNWAIT("root mount");
980 vfs_mountroot_wait_if_neccessary(const char *fs, const char *dev)
985 * In case of ZFS and NFS we don't have a way to wait for
986 * specific device. Also do the wait if the user forced that
987 * behaviour by setting vfs.root_mount_always_wait=1.
989 if (strcmp(fs, "zfs") == 0 || strstr(fs, "nfs") != NULL ||
990 dev[0] == '\0' || root_mount_always_wait != 0) {
991 vfs_mountroot_wait();
996 * Otherwise, no point in waiting if the device is already there.
997 * Note that we must wait for GEOM to finish reconfiguring itself,
998 * eg for geom_part(4) to finish tasting.
1001 if (parse_mount_dev_present(dev))
1005 * No luck. Let's wait. This code looks weird, but it's that way
1006 * to behave exactly as it used to work before.
1008 vfs_mountroot_wait();
1009 printf("mountroot: waiting for device %s...\n", dev);
1011 timeout = root_mount_timeout * hz;
1013 pause("rmdev", delay);
1015 } while (timeout > 0 && !parse_mount_dev_present(dev));
1032 mtx_assert(&Giant, MA_NOTOWNED);
1038 sb = sbuf_new_auto();
1039 vfs_mountroot_conf0(sb);
1042 error = vfs_mountroot_devfs(td, &mp);
1044 error = vfs_mountroot_parse(sb, mp);
1046 vfs_mountroot_shuffle(td, mp);
1048 error = vfs_mountroot_readconf(td, sb);
1056 * Iterate over all currently mounted file systems and use
1057 * the time stamp found to check and/or initialize the RTC.
1058 * Call inittodr() only once and pass it the largest of the
1059 * timestamps we encounter.
1062 mtx_lock(&mountlist_mtx);
1063 mp = TAILQ_FIRST(&mountlist);
1064 while (mp != NULL) {
1065 if (mp->mnt_time > timebase)
1066 timebase = mp->mnt_time;
1067 mp = TAILQ_NEXT(mp, mnt_list);
1069 mtx_unlock(&mountlist_mtx);
1072 /* Keep prison0's root in sync with the global rootvnode. */
1073 mtx_lock(&prison0.pr_mtx);
1074 prison0.pr_root = rootvnode;
1075 vref(prison0.pr_root);
1076 mtx_unlock(&prison0.pr_mtx);
1078 mtx_lock(&root_holds_mtx);
1079 atomic_store_rel_int(&root_mount_complete, 1);
1080 wakeup(&root_mount_complete);
1081 mtx_unlock(&root_holds_mtx);
1083 EVENTHANDLER_INVOKE(mountroot);
1088 static struct mntarg *
1089 parse_mountroot_options(struct mntarg *ma, const char *options)
1092 char *name, *name_arg;
1093 char *val, *val_arg;
1096 if (options == NULL || options[0] == '\0')
1099 p = opts = strdup(options, M_MOUNT);
1104 while((name = strsep(&p, ",")) != NULL) {
1105 if (name[0] == '\0')
1108 val = strchr(name, '=');
1113 if( strcmp(name, "rw") == 0 ||
1114 strcmp(name, "noro") == 0) {
1116 * The first time we mount the root file system,
1117 * we need to mount 'ro', so We need to ignore
1118 * 'rw' and 'noro' mount options.
1122 name_arg = strdup(name, M_MOUNT);
1125 val_arg = strdup(val, M_MOUNT);
1127 ma = mount_arg(ma, name_arg, val_arg,
1128 (val_arg != NULL ? -1 : 0));
1130 free(opts, M_MOUNT);