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/eventhandler.h>
49 #include <sys/fcntl.h>
51 #include <sys/kernel.h>
52 #include <sys/malloc.h>
53 #include <sys/mdioctl.h>
54 #include <sys/mount.h>
55 #include <sys/mutex.h>
56 #include <sys/namei.h>
59 #include <sys/filedesc.h>
60 #include <sys/reboot.h>
63 #include <sys/syscallsubr.h>
64 #include <sys/sysproto.h>
66 #include <sys/sysctl.h>
67 #include <sys/sysent.h>
68 #include <sys/systm.h>
69 #include <sys/vnode.h>
71 #include <geom/geom.h>
74 * The root filesystem is detailed in the kernel environment variable
75 * vfs.root.mountfrom, which is expected to be in the general format
77 * <vfsname>:[<path>][ <vfsname>:[<path>] ...]
78 * vfsname := the name of a VFS known to the kernel and capable
79 * of being mounted as root
80 * path := disk device name or other data used by the filesystem
81 * to locate its physical store
83 * If the environment variable vfs.root.mountfrom is a space separated list,
84 * each list element is tried in turn and the root filesystem will be mounted
85 * from the first one that succeeds.
87 * The environment variable vfs.root.mountfrom.options is a comma delimited
88 * set of string mount options. These mount options must be parseable
89 * by nmount() in the kernel.
92 static int parse_mount(char **);
93 static struct mntarg *parse_mountroot_options(struct mntarg *, const char *);
94 static int sysctl_vfs_root_mount_hold(SYSCTL_HANDLER_ARGS);
95 static void vfs_mountroot_wait(void);
96 static int vfs_mountroot_wait_if_neccessary(const char *fs, const char *dev);
99 * The vnode of the system's root (/ in the filesystem, without chroot
102 struct vnode *rootvnode;
105 * Mount of the system's /dev.
107 struct mount *rootdevmp;
109 char *rootdevnames[2] = {NULL, NULL};
111 struct mtx root_holds_mtx;
112 MTX_SYSINIT(root_holds, &root_holds_mtx, "root_holds", MTX_DEF);
114 static TAILQ_HEAD(, root_hold_token) root_holds =
115 TAILQ_HEAD_INITIALIZER(root_holds);
130 static enum action root_mount_onfail = A_CONTINUE;
132 static int root_mount_mddev;
133 static int root_mount_complete;
135 /* By default wait up to 3 seconds for devices to appear. */
136 static int root_mount_timeout = 3;
137 TUNABLE_INT("vfs.mountroot.timeout", &root_mount_timeout);
139 static int root_mount_always_wait = 0;
140 SYSCTL_INT(_vfs, OID_AUTO, root_mount_always_wait, CTLFLAG_RDTUN,
141 &root_mount_always_wait, 0,
142 "Wait for root mount holds even if the root device already exists");
144 SYSCTL_PROC(_vfs, OID_AUTO, root_mount_hold,
145 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
146 NULL, 0, sysctl_vfs_root_mount_hold, "A",
147 "List of root mount hold tokens");
150 sysctl_vfs_root_mount_hold(SYSCTL_HANDLER_ARGS)
153 struct root_hold_token *h;
156 sbuf_new(&sb, NULL, 256, SBUF_AUTOEXTEND | SBUF_INCLUDENUL);
158 mtx_lock(&root_holds_mtx);
159 TAILQ_FOREACH(h, &root_holds, list) {
160 if (h != TAILQ_FIRST(&root_holds))
162 sbuf_printf(&sb, "%s", h->who);
164 mtx_unlock(&root_holds_mtx);
166 error = sbuf_finish(&sb);
168 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
173 struct root_hold_token *
174 root_mount_hold(const char *identifier)
176 struct root_hold_token *h;
178 h = malloc(sizeof *h, M_DEVBUF, M_ZERO | M_WAITOK);
181 mtx_lock(&root_holds_mtx);
182 TSHOLD("root mount");
183 TAILQ_INSERT_TAIL(&root_holds, h, list);
184 mtx_unlock(&root_holds_mtx);
189 root_mount_hold_token(const char *identifier, struct root_hold_token *h)
192 struct root_hold_token *t;
197 mtx_lock(&root_holds_mtx);
199 TAILQ_FOREACH(t, &root_holds, list) {
201 panic("Duplicate mount hold by '%s' on %p",
206 TSHOLD("root mount");
207 TAILQ_INSERT_TAIL(&root_holds, h, list);
208 mtx_unlock(&root_holds_mtx);
212 root_mount_rel(struct root_hold_token *h)
215 if (h == NULL || h->flags == RH_FREE)
218 mtx_lock(&root_holds_mtx);
219 TAILQ_REMOVE(&root_holds, h, list);
220 TSRELEASE("root mount");
222 mtx_unlock(&root_holds_mtx);
223 if (h->flags == RH_ALLOC) {
233 /* No mutex is acquired here because int stores are atomic. */
234 return (root_mount_complete);
242 if (VFS_ROOT(TAILQ_FIRST(&mountlist), LK_EXCLUSIVE, &rootvnode))
243 panic("set_rootvnode: Cannot find root vnode");
245 VOP_UNLOCK(rootvnode);
247 p = curthread->td_proc;
248 FILEDESC_XLOCK(p->p_fd);
250 if (p->p_fd->fd_cdir != NULL)
251 vrele(p->p_fd->fd_cdir);
252 p->p_fd->fd_cdir = rootvnode;
255 if (p->p_fd->fd_rdir != NULL)
256 vrele(p->p_fd->fd_rdir);
257 p->p_fd->fd_rdir = rootvnode;
260 FILEDESC_XUNLOCK(p->p_fd);
264 vfs_mountroot_devfs(struct thread *td, struct mount **mpp)
266 struct vfsoptlist *opts;
267 struct vfsconf *vfsp;
273 if (rootdevmp != NULL) {
275 * Already have /dev; this happens during rerooting.
277 error = vfs_busy(rootdevmp, 0);
282 vfsp = vfs_byname("devfs");
283 KASSERT(vfsp != NULL, ("Could not find devfs by name"));
287 mp = vfs_mount_alloc(NULLVP, vfsp, "/dev", td->td_ucred);
289 error = VFS_MOUNT(mp);
290 KASSERT(error == 0, ("VFS_MOUNT(devfs) failed %d", error));
294 error = VFS_STATFS(mp, &mp->mnt_stat);
295 KASSERT(error == 0, ("VFS_STATFS(devfs) failed %d", error));
299 opts = malloc(sizeof(struct vfsoptlist), M_MOUNT, M_WAITOK);
303 mtx_lock(&mountlist_mtx);
304 TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
305 mtx_unlock(&mountlist_mtx);
314 error = kern_symlinkat(td, "/", AT_FDCWD, "dev", UIO_SYSSPACE);
316 printf("kern_symlink /dev -> / returns %d\n", error);
322 vfs_mountroot_shuffle(struct thread *td, struct mount *mpdevfs)
325 struct mount *mporoot, *mpnroot;
326 struct vnode *vp, *vporoot, *vpdevfs;
330 mpnroot = TAILQ_NEXT(mpdevfs, mnt_list);
332 /* Shuffle the mountlist. */
333 mtx_lock(&mountlist_mtx);
334 mporoot = TAILQ_FIRST(&mountlist);
335 TAILQ_REMOVE(&mountlist, mpdevfs, mnt_list);
336 if (mporoot != mpdevfs) {
337 TAILQ_REMOVE(&mountlist, mpnroot, mnt_list);
338 TAILQ_INSERT_HEAD(&mountlist, mpnroot, mnt_list);
340 TAILQ_INSERT_TAIL(&mountlist, mpdevfs, mnt_list);
341 mtx_unlock(&mountlist_mtx);
343 cache_purgevfs(mporoot, true);
344 if (mporoot != mpdevfs)
345 cache_purgevfs(mpdevfs, true);
347 if (VFS_ROOT(mporoot, LK_EXCLUSIVE, &vporoot))
348 panic("vfs_mountroot_shuffle: Cannot find root vnode");
351 vporoot->v_iflag &= ~VI_MOUNT;
353 vporoot->v_mountedhere = NULL;
354 mporoot->mnt_flag &= ~MNT_ROOTFS;
355 mporoot->mnt_vnodecovered = NULL;
358 /* Set up the new rootvnode, and purge the cache */
359 mpnroot->mnt_vnodecovered = NULL;
361 cache_purgevfs(rootvnode->v_mount, true);
363 if (mporoot != mpdevfs) {
364 /* Remount old root under /.mount or /mnt */
366 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
370 NDFREE(&nd, NDF_ONLY_PNBUF);
372 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
378 error = (vp->v_type == VDIR) ? 0 : ENOTDIR;
380 error = vinvalbuf(vp, V_SAVE, 0, 0);
383 mporoot->mnt_vnodecovered = vp;
384 vp->v_mountedhere = mporoot;
385 strlcpy(mporoot->mnt_stat.f_mntonname,
391 NDFREE(&nd, NDF_ONLY_PNBUF);
394 printf("mountroot: unable to remount previous root "
395 "under /.mount or /mnt (error %d)\n", error);
398 /* Remount devfs under /dev */
399 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, "/dev", td);
403 error = (vp->v_type == VDIR) ? 0 : ENOTDIR;
405 error = vinvalbuf(vp, V_SAVE, 0, 0);
407 vpdevfs = mpdevfs->mnt_vnodecovered;
408 if (vpdevfs != NULL) {
409 cache_purge(vpdevfs);
410 vpdevfs->v_mountedhere = NULL;
413 mpdevfs->mnt_vnodecovered = vp;
414 vp->v_mountedhere = mpdevfs;
420 printf("mountroot: unable to remount devfs under /dev "
421 "(error %d)\n", error);
422 NDFREE(&nd, NDF_ONLY_PNBUF);
424 if (mporoot == mpdevfs) {
426 /* Unlink the no longer needed /dev/dev -> / symlink */
427 error = kern_funlinkat(td, AT_FDCWD, "/dev/dev", FD_NONE,
430 printf("mountroot: unable to unlink /dev/dev "
431 "(error %d)\n", error);
436 * Configuration parser.
439 /* Parser character classes. */
440 #define CC_WHITESPACE -1
441 #define CC_NONWHITESPACE -2
448 parse_peek(char **conf)
455 parse_poke(char **conf, int c)
462 parse_advance(char **conf)
469 parse_skipto(char **conf, int mc)
474 c = parse_peek(conf);
479 match = (c == ' ' || c == '\t' || c == '\n') ? 1 : 0;
481 case CC_NONWHITESPACE:
484 match = (c != ' ' && c != '\t') ? 1 : 0;
487 match = (c == mc) ? 1 : 0;
498 parse_token(char **conf, char **tok)
505 error = parse_skipto(conf, CC_NONWHITESPACE);
509 error = parse_skipto(conf, CC_WHITESPACE);
511 *tok = malloc(len + 1, M_TEMP, M_WAITOK | M_ZERO);
517 parse_dir_ask_printenv(const char *var)
521 val = kern_getenv(var);
523 printf(" %s=%s\n", var, val);
529 parse_dir_ask(char **conf)
535 vfs_mountroot_wait();
537 printf("\nLoader variables:\n");
538 parse_dir_ask_printenv("vfs.root.mountfrom");
539 parse_dir_ask_printenv("vfs.root.mountfrom.options");
541 printf("\nManual root filesystem specification:\n");
542 printf(" <fstype>:<device> [options]\n");
543 printf(" Mount <device> using filesystem <fstype>\n");
544 printf(" and with the specified (optional) option list.\n");
546 printf(" eg. ufs:/dev/da0s1a\n");
547 printf(" zfs:zroot/ROOT/default\n");
548 printf(" cd9660:/dev/cd0 ro\n");
549 printf(" (which is equivalent to: ");
550 printf("mount -t cd9660 -o ro /dev/cd0 /)\n");
552 printf(" ? List valid disk boot devices\n");
553 printf(" . Yield 1 second (for background tasks)\n");
554 printf(" <empty line> Abort manual input\n");
558 printf("\nmountroot> ");
559 cngets(name, sizeof(name), GETS_ECHO);
562 if (name[0] == '?' && name[1] == '\0') {
563 printf("\nList of GEOM managed disk devices:\n ");
567 if (name[0] == '.' && name[1] == '\0') {
572 error = parse_mount(&mnt);
574 printf("Invalid file system specification.\n");
575 } while (error != 0);
581 parse_dir_md(char **conf)
585 struct md_ioctl *mdio;
591 error = parse_token(conf, &tok);
596 mdio = malloc(sizeof(*mdio) + len + 1, M_TEMP, M_WAITOK | M_ZERO);
597 path = (void *)(mdio + 1);
598 bcopy(tok, path, len);
601 /* Get file status. */
602 error = kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &sb, NULL);
606 /* Open /dev/mdctl so that we can attach/detach. */
607 error = kern_openat(td, AT_FDCWD, "/dev/" MDCTL_NAME, UIO_SYSSPACE,
612 fd = td->td_retval[0];
613 mdio->md_version = MDIOVERSION;
614 mdio->md_type = MD_VNODE;
616 if (root_mount_mddev != -1) {
617 mdio->md_unit = root_mount_mddev;
618 (void)kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio);
619 /* Ignore errors. We don't care. */
620 root_mount_mddev = -1;
623 mdio->md_file = (void *)(mdio + 1);
624 mdio->md_options = MD_AUTOUNIT | MD_READONLY;
625 mdio->md_mediasize = sb.st_size;
627 error = kern_ioctl(td, fd, MDIOCATTACH, (void *)mdio);
631 if (mdio->md_unit > 9) {
632 printf("rootmount: too many md units\n");
633 mdio->md_file = NULL;
634 mdio->md_options = 0;
635 mdio->md_mediasize = 0;
636 error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio);
637 /* Ignore errors. We don't care. */
642 root_mount_mddev = mdio->md_unit;
643 printf(MD_NAME "%u attached to %s\n", root_mount_mddev, mdio->md_file);
645 error = kern_close(td, fd);
653 parse_dir_onfail(char **conf)
658 error = parse_token(conf, &action);
662 if (!strcmp(action, "continue"))
663 root_mount_onfail = A_CONTINUE;
664 else if (!strcmp(action, "panic"))
665 root_mount_onfail = A_PANIC;
666 else if (!strcmp(action, "reboot"))
667 root_mount_onfail = A_REBOOT;
668 else if (!strcmp(action, "retry"))
669 root_mount_onfail = A_RETRY;
671 printf("rootmount: %s: unknown action\n", action);
675 free(action, M_TEMP);
680 parse_dir_timeout(char **conf)
686 error = parse_token(conf, &tok);
690 secs = strtol(tok, &endtok, 0);
691 error = (secs < 0 || *endtok != '\0') ? EINVAL : 0;
693 root_mount_timeout = secs;
699 parse_directive(char **conf)
704 error = parse_token(conf, &dir);
708 if (strcmp(dir, ".ask") == 0)
709 error = parse_dir_ask(conf);
710 else if (strcmp(dir, ".md") == 0)
711 error = parse_dir_md(conf);
712 else if (strcmp(dir, ".onfail") == 0)
713 error = parse_dir_onfail(conf);
714 else if (strcmp(dir, ".timeout") == 0)
715 error = parse_dir_timeout(conf);
717 printf("mountroot: invalid directive `%s'\n", dir);
718 /* Ignore the rest of the line. */
719 (void)parse_skipto(conf, '\n');
727 parse_mount_dev_present(const char *dev)
732 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, dev, curthread);
736 NDFREE(&nd, NDF_ONLY_PNBUF);
737 return (error != 0) ? 0 : 1;
742 parse_mount(char **conf)
746 char *dev, *fs, *opts, *tok;
747 int delay, error, timeout;
749 error = parse_token(conf, &tok);
753 error = parse_skipto(&tok, ':');
758 parse_poke(&tok, '\0');
762 if (root_mount_mddev != -1) {
763 /* Handle substitution for the md unit number. */
764 tok = strstr(dev, "md#");
766 tok[2] = '0' + root_mount_mddev;
770 error = parse_token(conf, &tok);
771 opts = (error == 0) ? tok : NULL;
773 printf("Trying to mount root from %s:%s [%s]...\n", fs, dev,
774 (opts != NULL) ? opts : "");
776 errmsg = malloc(ERRMSGL, M_TEMP, M_WAITOK | M_ZERO);
778 if (vfs_byname(fs) == NULL) {
779 strlcpy(errmsg, "unknown file system", ERRMSGL);
784 error = vfs_mountroot_wait_if_neccessary(fs, dev);
789 timeout = root_mount_timeout * hz;
793 ma = mount_arg(ma, "fstype", fs, -1);
794 ma = mount_arg(ma, "fspath", "/", -1);
795 ma = mount_arg(ma, "from", dev, -1);
796 ma = mount_arg(ma, "errmsg", errmsg, ERRMSGL);
797 ma = mount_arg(ma, "ro", NULL, 0);
798 ma = parse_mountroot_options(ma, opts);
800 error = kernel_mount(ma, MNT_ROOTFS);
801 if (error == 0 || timeout <= 0)
804 if (root_mount_timeout * hz == timeout ||
805 (bootverbose && timeout % hz == 0)) {
806 printf("Mounting from %s:%s failed with error %d; "
807 "retrying for %d more second%s\n", fs, dev, error,
808 timeout / hz, (timeout / hz > 1) ? "s" : "");
810 pause("rmretry", delay);
815 printf("Mounting from %s:%s failed with error %d",
817 if (errmsg[0] != '\0')
818 printf(": %s", errmsg);
822 free(errmsg, M_TEMP);
825 /* kernel_mount can return -1 on error. */
826 return ((error < 0) ? EDOOFUS : error);
831 vfs_mountroot_parse(struct sbuf *sb, struct mount *mpdevfs)
837 root_mount_mddev = -1;
840 conf = sbuf_data(sb);
841 mp = TAILQ_NEXT(mpdevfs, mnt_list);
842 error = (mp == NULL) ? 0 : EDOOFUS;
843 root_mount_onfail = A_CONTINUE;
845 error = parse_skipto(&conf, CC_NONWHITESPACE);
846 if (error == PE_EOL) {
847 parse_advance(&conf);
852 switch (parse_peek(&conf)) {
854 error = parse_skipto(&conf, '\n');
857 error = parse_directive(&conf);
860 error = parse_mount(&conf);
862 printf("mountroot: invalid file system "
870 /* Ignore any trailing garbage on the line. */
871 if (parse_peek(&conf) != '\n') {
872 printf("mountroot: advancing to next directive...\n");
873 (void)parse_skipto(&conf, '\n');
875 mp = TAILQ_NEXT(mpdevfs, mnt_list);
881 * We failed to mount (a new) root.
883 switch (root_mount_onfail) {
887 panic("mountroot: unable to (re-)mount root.");
892 kern_reboot(RB_NOSYNC);
900 vfs_mountroot_conf0(struct sbuf *sb)
902 char *s, *tok, *mnt, *opt;
905 sbuf_printf(sb, ".onfail panic\n");
906 sbuf_printf(sb, ".timeout %d\n", root_mount_timeout);
907 if (boothowto & RB_ASKNAME)
908 sbuf_printf(sb, ".ask\n");
910 if (boothowto & RB_DFLTROOT)
911 sbuf_printf(sb, "%s\n", ROOTDEVNAME);
913 if (boothowto & RB_CDROM) {
914 sbuf_printf(sb, "cd9660:/dev/cd0 ro\n");
915 sbuf_printf(sb, ".timeout 0\n");
916 sbuf_printf(sb, "cd9660:/dev/cd1 ro\n");
917 sbuf_printf(sb, ".timeout %d\n", root_mount_timeout);
919 s = kern_getenv("vfs.root.mountfrom");
921 opt = kern_getenv("vfs.root.mountfrom.options");
923 error = parse_token(&tok, &mnt);
925 sbuf_printf(sb, "%s %s\n", mnt,
926 (opt != NULL) ? opt : "");
928 error = parse_token(&tok, &mnt);
934 if (rootdevnames[0] != NULL)
935 sbuf_printf(sb, "%s\n", rootdevnames[0]);
936 if (rootdevnames[1] != NULL)
937 sbuf_printf(sb, "%s\n", rootdevnames[1]);
939 if (!(boothowto & RB_DFLTROOT))
940 sbuf_printf(sb, "%s\n", ROOTDEVNAME);
942 if (!(boothowto & RB_ASKNAME))
943 sbuf_printf(sb, ".ask\n");
947 vfs_mountroot_readconf(struct thread *td, struct sbuf *sb)
949 static char buf[128];
953 int error, flags, len;
955 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/.mount.conf", td);
957 error = vn_open(&nd, &flags, 0, NULL);
961 NDFREE(&nd, NDF_ONLY_PNBUF);
963 len = sizeof(buf) - 1;
965 error = vn_rdwr(UIO_READ, nd.ni_vp, buf, len, ofs,
966 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred,
972 buf[len - resid] = 0;
973 sbuf_printf(sb, "%s", buf);
977 VOP_UNLOCK(nd.ni_vp);
978 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
983 vfs_mountroot_wait(void)
985 struct root_hold_token *h;
986 struct timeval lastfail;
994 mtx_lock(&root_holds_mtx);
995 if (TAILQ_EMPTY(&root_holds)) {
996 mtx_unlock(&root_holds_mtx);
999 if (ppsratecheck(&lastfail, &curfail, 1)) {
1000 printf("Root mount waiting for:");
1001 TAILQ_FOREACH(h, &root_holds, list)
1002 printf(" %s", h->who);
1005 TSWAIT("root mount");
1006 msleep(&root_holds, &root_holds_mtx, PZERO | PDROP, "roothold",
1008 TSUNWAIT("root mount");
1015 vfs_mountroot_wait_if_neccessary(const char *fs, const char *dev)
1020 * In case of ZFS and NFS we don't have a way to wait for
1021 * specific device. Also do the wait if the user forced that
1022 * behaviour by setting vfs.root_mount_always_wait=1.
1024 if (strcmp(fs, "zfs") == 0 || strstr(fs, "nfs") != NULL ||
1025 dev[0] == '\0' || root_mount_always_wait != 0) {
1026 vfs_mountroot_wait();
1031 * Otherwise, no point in waiting if the device is already there.
1032 * Note that we must wait for GEOM to finish reconfiguring itself,
1033 * eg for geom_part(4) to finish tasting.
1036 if (parse_mount_dev_present(dev))
1040 * No luck. Let's wait. This code looks weird, but it's that way
1041 * to behave exactly as it used to work before.
1043 vfs_mountroot_wait();
1044 printf("mountroot: waiting for device %s...\n", dev);
1046 timeout = root_mount_timeout * hz;
1048 pause("rmdev", delay);
1050 } while (timeout > 0 && !parse_mount_dev_present(dev));
1067 mtx_assert(&Giant, MA_NOTOWNED);
1073 sb = sbuf_new_auto();
1074 vfs_mountroot_conf0(sb);
1077 error = vfs_mountroot_devfs(td, &mp);
1079 error = vfs_mountroot_parse(sb, mp);
1081 vfs_mountroot_shuffle(td, mp);
1083 error = vfs_mountroot_readconf(td, sb);
1091 * Iterate over all currently mounted file systems and use
1092 * the time stamp found to check and/or initialize the RTC.
1093 * Call inittodr() only once and pass it the largest of the
1094 * timestamps we encounter.
1097 mtx_lock(&mountlist_mtx);
1098 mp = TAILQ_FIRST(&mountlist);
1099 while (mp != NULL) {
1100 if (mp->mnt_time > timebase)
1101 timebase = mp->mnt_time;
1102 mp = TAILQ_NEXT(mp, mnt_list);
1104 mtx_unlock(&mountlist_mtx);
1107 /* Keep prison0's root in sync with the global rootvnode. */
1108 mtx_lock(&prison0.pr_mtx);
1109 prison0.pr_root = rootvnode;
1110 vref(prison0.pr_root);
1111 mtx_unlock(&prison0.pr_mtx);
1113 mtx_lock(&root_holds_mtx);
1114 atomic_store_rel_int(&root_mount_complete, 1);
1115 wakeup(&root_mount_complete);
1116 mtx_unlock(&root_holds_mtx);
1118 EVENTHANDLER_INVOKE(mountroot);
1123 static struct mntarg *
1124 parse_mountroot_options(struct mntarg *ma, const char *options)
1127 char *name, *name_arg;
1128 char *val, *val_arg;
1131 if (options == NULL || options[0] == '\0')
1134 p = opts = strdup(options, M_MOUNT);
1139 while((name = strsep(&p, ",")) != NULL) {
1140 if (name[0] == '\0')
1143 val = strchr(name, '=');
1148 if( strcmp(name, "rw") == 0 ||
1149 strcmp(name, "noro") == 0) {
1151 * The first time we mount the root file system,
1152 * we need to mount 'ro', so We need to ignore
1153 * 'rw' and 'noro' mount options.
1157 name_arg = strdup(name, M_MOUNT);
1160 val_arg = strdup(val, M_MOUNT);
1162 ma = mount_arg(ma, name_arg, val_arg,
1163 (val_arg != NULL ? -1 : 0));
1165 free(opts, M_MOUNT);