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);
241 if (VFS_ROOT(TAILQ_FIRST(&mountlist), LK_EXCLUSIVE, &rootvnode))
242 panic("set_rootvnode: Cannot find root vnode");
244 VOP_UNLOCK(rootvnode);
250 vfs_mountroot_devfs(struct thread *td, struct mount **mpp)
252 struct vfsoptlist *opts;
253 struct vfsconf *vfsp;
259 if (rootdevmp != NULL) {
261 * Already have /dev; this happens during rerooting.
263 error = vfs_busy(rootdevmp, 0);
268 vfsp = vfs_byname("devfs");
269 KASSERT(vfsp != NULL, ("Could not find devfs by name"));
273 mp = vfs_mount_alloc(NULLVP, vfsp, "/dev", td->td_ucred);
275 error = VFS_MOUNT(mp);
276 KASSERT(error == 0, ("VFS_MOUNT(devfs) failed %d", error));
280 error = VFS_STATFS(mp, &mp->mnt_stat);
281 KASSERT(error == 0, ("VFS_STATFS(devfs) failed %d", error));
285 opts = malloc(sizeof(struct vfsoptlist), M_MOUNT, M_WAITOK);
289 mtx_lock(&mountlist_mtx);
290 TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
291 mtx_unlock(&mountlist_mtx);
300 error = kern_symlinkat(td, "/", AT_FDCWD, "dev", UIO_SYSSPACE);
302 printf("kern_symlink /dev -> / returns %d\n", error);
308 vfs_mountroot_shuffle(struct thread *td, struct mount *mpdevfs)
311 struct mount *mporoot, *mpnroot;
312 struct vnode *vp, *vporoot, *vpdevfs;
316 mpnroot = TAILQ_NEXT(mpdevfs, mnt_list);
318 /* Shuffle the mountlist. */
319 mtx_lock(&mountlist_mtx);
320 mporoot = TAILQ_FIRST(&mountlist);
321 TAILQ_REMOVE(&mountlist, mpdevfs, mnt_list);
322 if (mporoot != mpdevfs) {
323 TAILQ_REMOVE(&mountlist, mpnroot, mnt_list);
324 TAILQ_INSERT_HEAD(&mountlist, mpnroot, mnt_list);
326 TAILQ_INSERT_TAIL(&mountlist, mpdevfs, mnt_list);
327 mtx_unlock(&mountlist_mtx);
329 cache_purgevfs(mporoot);
330 if (mporoot != mpdevfs)
331 cache_purgevfs(mpdevfs);
333 if (VFS_ROOT(mporoot, LK_EXCLUSIVE, &vporoot))
334 panic("vfs_mountroot_shuffle: Cannot find root vnode");
337 vporoot->v_iflag &= ~VI_MOUNT;
338 vn_irflag_unset_locked(vporoot, VIRF_MOUNTPOINT);
339 vporoot->v_mountedhere = NULL;
341 mporoot->mnt_flag &= ~MNT_ROOTFS;
342 mporoot->mnt_vnodecovered = NULL;
345 /* Set up the new rootvnode, and purge the cache */
346 mpnroot->mnt_vnodecovered = NULL;
348 cache_purgevfs(rootvnode->v_mount);
350 if (mporoot != mpdevfs) {
351 /* Remount old root under /.mount or /mnt */
353 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
357 NDFREE(&nd, NDF_ONLY_PNBUF);
359 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
365 error = (vp->v_type == VDIR) ? 0 : ENOTDIR;
367 error = vinvalbuf(vp, V_SAVE, 0, 0);
370 mporoot->mnt_vnodecovered = vp;
371 vp->v_mountedhere = mporoot;
372 strlcpy(mporoot->mnt_stat.f_mntonname,
378 NDFREE(&nd, NDF_ONLY_PNBUF);
381 printf("mountroot: unable to remount previous root "
382 "under /.mount or /mnt (error %d)\n", error);
385 /* Remount devfs under /dev */
386 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, "/dev", td);
390 error = (vp->v_type == VDIR) ? 0 : ENOTDIR;
392 error = vinvalbuf(vp, V_SAVE, 0, 0);
394 vpdevfs = mpdevfs->mnt_vnodecovered;
395 if (vpdevfs != NULL) {
396 cache_purge(vpdevfs);
398 vn_irflag_unset_locked(vpdevfs, VIRF_MOUNTPOINT);
399 vpdevfs->v_mountedhere = NULL;
404 mpdevfs->mnt_vnodecovered = vp;
405 vn_irflag_set_locked(vp, VIRF_MOUNTPOINT);
406 vp->v_mountedhere = mpdevfs;
413 printf("mountroot: unable to remount devfs under /dev "
414 "(error %d)\n", error);
415 NDFREE(&nd, NDF_ONLY_PNBUF);
417 if (mporoot == mpdevfs) {
419 /* Unlink the no longer needed /dev/dev -> / symlink */
420 error = kern_funlinkat(td, AT_FDCWD, "/dev/dev", FD_NONE,
423 printf("mountroot: unable to unlink /dev/dev "
424 "(error %d)\n", error);
429 * Configuration parser.
432 /* Parser character classes. */
433 #define CC_WHITESPACE -1
434 #define CC_NONWHITESPACE -2
441 parse_peek(char **conf)
448 parse_poke(char **conf, int c)
455 parse_advance(char **conf)
462 parse_skipto(char **conf, int mc)
467 c = parse_peek(conf);
472 match = (c == ' ' || c == '\t' || c == '\n') ? 1 : 0;
474 case CC_NONWHITESPACE:
477 match = (c != ' ' && c != '\t') ? 1 : 0;
480 match = (c == mc) ? 1 : 0;
491 parse_token(char **conf, char **tok)
498 error = parse_skipto(conf, CC_NONWHITESPACE);
502 error = parse_skipto(conf, CC_WHITESPACE);
504 *tok = malloc(len + 1, M_TEMP, M_WAITOK | M_ZERO);
510 parse_dir_ask_printenv(const char *var)
514 val = kern_getenv(var);
516 printf(" %s=%s\n", var, val);
522 parse_dir_ask(char **conf)
528 vfs_mountroot_wait();
530 printf("\nLoader variables:\n");
531 parse_dir_ask_printenv("vfs.root.mountfrom");
532 parse_dir_ask_printenv("vfs.root.mountfrom.options");
534 printf("\nManual root filesystem specification:\n");
535 printf(" <fstype>:<device> [options]\n");
536 printf(" Mount <device> using filesystem <fstype>\n");
537 printf(" and with the specified (optional) option list.\n");
539 printf(" eg. ufs:/dev/da0s1a\n");
540 printf(" zfs:zroot/ROOT/default\n");
541 printf(" cd9660:/dev/cd0 ro\n");
542 printf(" (which is equivalent to: ");
543 printf("mount -t cd9660 -o ro /dev/cd0 /)\n");
545 printf(" ? List valid disk boot devices\n");
546 printf(" . Yield 1 second (for background tasks)\n");
547 printf(" <empty line> Abort manual input\n");
551 printf("\nmountroot> ");
552 cngets(name, sizeof(name), GETS_ECHO);
555 if (name[0] == '?' && name[1] == '\0') {
556 printf("\nList of GEOM managed disk devices:\n ");
560 if (name[0] == '.' && name[1] == '\0') {
565 error = parse_mount(&mnt);
567 printf("Invalid file system specification.\n");
568 } while (error != 0);
574 parse_dir_md(char **conf)
578 struct md_ioctl *mdio;
585 error = parse_token(conf, &tok);
590 mdio = malloc(sizeof(*mdio) + len + 1, M_TEMP, M_WAITOK | M_ZERO);
591 path = (void *)(mdio + 1);
592 bcopy(tok, path, len);
595 /* Get file status. */
596 error = kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &sb, NULL);
600 /* Open /dev/mdctl so that we can attach/detach. */
601 error = kern_openat(td, AT_FDCWD, "/dev/" MDCTL_NAME, UIO_SYSSPACE,
606 fd = td->td_retval[0];
607 mdio->md_version = MDIOVERSION;
608 mdio->md_type = MD_VNODE;
610 if (root_mount_mddev != -1) {
611 mdio->md_unit = root_mount_mddev;
612 (void)kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio);
613 /* Ignore errors. We don't care. */
614 root_mount_mddev = -1;
617 mdio->md_file = (void *)(mdio + 1);
618 mdio->md_options = MD_AUTOUNIT | MD_READONLY;
619 mdio->md_mediasize = sb.st_size;
621 error = kern_ioctl(td, fd, MDIOCATTACH, (void *)mdio);
625 if (mdio->md_unit > 9) {
626 printf("rootmount: too many md units\n");
627 mdio->md_file = NULL;
628 mdio->md_options = 0;
629 mdio->md_mediasize = 0;
630 error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio);
631 /* Ignore errors. We don't care. */
636 root_mount_mddev = mdio->md_unit;
637 printf(MD_NAME "%u attached to %s\n", root_mount_mddev, mdio->md_file);
641 (void)kern_close(td, fd);
647 parse_dir_onfail(char **conf)
652 error = parse_token(conf, &action);
656 if (!strcmp(action, "continue"))
657 root_mount_onfail = A_CONTINUE;
658 else if (!strcmp(action, "panic"))
659 root_mount_onfail = A_PANIC;
660 else if (!strcmp(action, "reboot"))
661 root_mount_onfail = A_REBOOT;
662 else if (!strcmp(action, "retry"))
663 root_mount_onfail = A_RETRY;
665 printf("rootmount: %s: unknown action\n", action);
669 free(action, M_TEMP);
674 parse_dir_timeout(char **conf)
680 error = parse_token(conf, &tok);
684 secs = strtol(tok, &endtok, 0);
685 error = (secs < 0 || *endtok != '\0') ? EINVAL : 0;
687 root_mount_timeout = secs;
693 parse_directive(char **conf)
698 error = parse_token(conf, &dir);
702 if (strcmp(dir, ".ask") == 0)
703 error = parse_dir_ask(conf);
704 else if (strcmp(dir, ".md") == 0)
705 error = parse_dir_md(conf);
706 else if (strcmp(dir, ".onfail") == 0)
707 error = parse_dir_onfail(conf);
708 else if (strcmp(dir, ".timeout") == 0)
709 error = parse_dir_timeout(conf);
711 printf("mountroot: invalid directive `%s'\n", dir);
712 /* Ignore the rest of the line. */
713 (void)parse_skipto(conf, '\n');
721 parse_mount_dev_present(const char *dev)
726 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, dev, curthread);
730 NDFREE(&nd, NDF_ONLY_PNBUF);
731 return (error != 0) ? 0 : 1;
736 parse_mount(char **conf)
740 char *dev, *fs, *opts, *tok;
741 int delay, error, timeout;
743 error = parse_token(conf, &tok);
747 error = parse_skipto(&tok, ':');
752 parse_poke(&tok, '\0');
756 if (root_mount_mddev != -1) {
757 /* Handle substitution for the md unit number. */
758 tok = strstr(dev, "md#");
760 tok[2] = '0' + root_mount_mddev;
764 error = parse_token(conf, &tok);
765 opts = (error == 0) ? tok : NULL;
767 printf("Trying to mount root from %s:%s [%s]...\n", fs, dev,
768 (opts != NULL) ? opts : "");
770 errmsg = malloc(ERRMSGL, M_TEMP, M_WAITOK | M_ZERO);
772 if (vfs_byname(fs) == NULL) {
773 strlcpy(errmsg, "unknown file system", ERRMSGL);
778 error = vfs_mountroot_wait_if_neccessary(fs, dev);
783 timeout = root_mount_timeout * hz;
787 ma = mount_arg(ma, "fstype", fs, -1);
788 ma = mount_arg(ma, "fspath", "/", -1);
789 ma = mount_arg(ma, "from", dev, -1);
790 ma = mount_arg(ma, "errmsg", errmsg, ERRMSGL);
791 ma = mount_arg(ma, "ro", NULL, 0);
792 ma = parse_mountroot_options(ma, opts);
794 error = kernel_mount(ma, MNT_ROOTFS);
795 if (error == 0 || timeout <= 0)
798 if (root_mount_timeout * hz == timeout ||
799 (bootverbose && timeout % hz == 0)) {
800 printf("Mounting from %s:%s failed with error %d; "
801 "retrying for %d more second%s\n", fs, dev, error,
802 timeout / hz, (timeout / hz > 1) ? "s" : "");
804 pause("rmretry", delay);
809 printf("Mounting from %s:%s failed with error %d",
811 if (errmsg[0] != '\0')
812 printf(": %s", errmsg);
816 free(errmsg, M_TEMP);
819 /* kernel_mount can return -1 on error. */
820 return ((error < 0) ? EDOOFUS : error);
825 vfs_mountroot_parse(struct sbuf *sb, struct mount *mpdevfs)
831 root_mount_mddev = -1;
834 conf = sbuf_data(sb);
835 mp = TAILQ_NEXT(mpdevfs, mnt_list);
836 error = (mp == NULL) ? 0 : EDOOFUS;
837 root_mount_onfail = A_CONTINUE;
839 error = parse_skipto(&conf, CC_NONWHITESPACE);
840 if (error == PE_EOL) {
841 parse_advance(&conf);
846 switch (parse_peek(&conf)) {
848 error = parse_skipto(&conf, '\n');
851 error = parse_directive(&conf);
854 error = parse_mount(&conf);
856 printf("mountroot: invalid file system "
864 /* Ignore any trailing garbage on the line. */
865 if (parse_peek(&conf) != '\n') {
866 printf("mountroot: advancing to next directive...\n");
867 (void)parse_skipto(&conf, '\n');
869 mp = TAILQ_NEXT(mpdevfs, mnt_list);
875 * We failed to mount (a new) root.
877 switch (root_mount_onfail) {
881 panic("mountroot: unable to (re-)mount root.");
886 kern_reboot(RB_NOSYNC);
894 vfs_mountroot_conf0(struct sbuf *sb)
896 char *s, *tok, *mnt, *opt;
899 sbuf_printf(sb, ".onfail panic\n");
900 sbuf_printf(sb, ".timeout %d\n", root_mount_timeout);
901 if (boothowto & RB_ASKNAME)
902 sbuf_printf(sb, ".ask\n");
904 if (boothowto & RB_DFLTROOT)
905 sbuf_printf(sb, "%s\n", ROOTDEVNAME);
907 if (boothowto & RB_CDROM) {
908 sbuf_printf(sb, "cd9660:/dev/cd0 ro\n");
909 sbuf_printf(sb, ".timeout 0\n");
910 sbuf_printf(sb, "cd9660:/dev/cd1 ro\n");
911 sbuf_printf(sb, ".timeout %d\n", root_mount_timeout);
913 s = kern_getenv("vfs.root.mountfrom");
915 opt = kern_getenv("vfs.root.mountfrom.options");
917 error = parse_token(&tok, &mnt);
919 sbuf_printf(sb, "%s %s\n", mnt,
920 (opt != NULL) ? opt : "");
922 error = parse_token(&tok, &mnt);
928 if (rootdevnames[0] != NULL)
929 sbuf_printf(sb, "%s\n", rootdevnames[0]);
930 if (rootdevnames[1] != NULL)
931 sbuf_printf(sb, "%s\n", rootdevnames[1]);
933 if (!(boothowto & RB_DFLTROOT))
934 sbuf_printf(sb, "%s\n", ROOTDEVNAME);
936 if (!(boothowto & RB_ASKNAME))
937 sbuf_printf(sb, ".ask\n");
941 vfs_mountroot_readconf(struct thread *td, struct sbuf *sb)
943 static char buf[128];
947 int error, flags, len;
949 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/.mount.conf", td);
951 error = vn_open(&nd, &flags, 0, NULL);
955 NDFREE(&nd, NDF_ONLY_PNBUF);
957 len = sizeof(buf) - 1;
959 error = vn_rdwr(UIO_READ, nd.ni_vp, buf, len, ofs,
960 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred,
966 buf[len - resid] = 0;
967 sbuf_printf(sb, "%s", buf);
971 VOP_UNLOCK(nd.ni_vp);
972 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
977 vfs_mountroot_wait(void)
979 struct root_hold_token *h;
980 struct timeval lastfail;
989 mtx_lock(&root_holds_mtx);
990 if (TAILQ_EMPTY(&root_holds)) {
991 mtx_unlock(&root_holds_mtx);
994 if (ppsratecheck(&lastfail, &curfail, 1)) {
995 printf("Root mount waiting for:");
996 TAILQ_FOREACH(h, &root_holds, list)
997 printf(" %s", h->who);
1000 TSWAIT("root mount");
1001 msleep(&root_holds, &root_holds_mtx, PZERO | PDROP, "roothold",
1003 TSUNWAIT("root mount");
1010 vfs_mountroot_wait_if_neccessary(const char *fs, const char *dev)
1015 * In case of ZFS and NFS we don't have a way to wait for
1016 * specific device. Also do the wait if the user forced that
1017 * behaviour by setting vfs.root_mount_always_wait=1.
1019 if (strcmp(fs, "zfs") == 0 || strstr(fs, "nfs") != NULL ||
1020 dev[0] == '\0' || root_mount_always_wait != 0) {
1021 vfs_mountroot_wait();
1026 * Otherwise, no point in waiting if the device is already there.
1027 * Note that we must wait for GEOM to finish reconfiguring itself,
1028 * eg for geom_part(4) to finish tasting.
1031 if (parse_mount_dev_present(dev))
1035 * No luck. Let's wait. This code looks weird, but it's that way
1036 * to behave exactly as it used to work before.
1038 vfs_mountroot_wait();
1039 printf("mountroot: waiting for device %s...\n", dev);
1041 timeout = root_mount_timeout * hz;
1043 pause("rmdev", delay);
1045 } while (timeout > 0 && !parse_mount_dev_present(dev));
1062 mtx_assert(&Giant, MA_NOTOWNED);
1068 sb = sbuf_new_auto();
1069 vfs_mountroot_conf0(sb);
1072 error = vfs_mountroot_devfs(td, &mp);
1074 error = vfs_mountroot_parse(sb, mp);
1076 vfs_mountroot_shuffle(td, mp);
1078 error = vfs_mountroot_readconf(td, sb);
1086 * Iterate over all currently mounted file systems and use
1087 * the time stamp found to check and/or initialize the RTC.
1088 * Call inittodr() only once and pass it the largest of the
1089 * timestamps we encounter.
1092 mtx_lock(&mountlist_mtx);
1093 mp = TAILQ_FIRST(&mountlist);
1094 while (mp != NULL) {
1095 if (mp->mnt_time > timebase)
1096 timebase = mp->mnt_time;
1097 mp = TAILQ_NEXT(mp, mnt_list);
1099 mtx_unlock(&mountlist_mtx);
1102 /* Keep prison0's root in sync with the global rootvnode. */
1103 mtx_lock(&prison0.pr_mtx);
1104 prison0.pr_root = rootvnode;
1105 vref(prison0.pr_root);
1106 mtx_unlock(&prison0.pr_mtx);
1108 mtx_lock(&root_holds_mtx);
1109 atomic_store_rel_int(&root_mount_complete, 1);
1110 wakeup(&root_mount_complete);
1111 mtx_unlock(&root_holds_mtx);
1113 EVENTHANDLER_INVOKE(mountroot);
1118 static struct mntarg *
1119 parse_mountroot_options(struct mntarg *ma, const char *options)
1122 char *name, *name_arg;
1123 char *val, *val_arg;
1126 if (options == NULL || options[0] == '\0')
1129 p = opts = strdup(options, M_MOUNT);
1134 while((name = strsep(&p, ",")) != NULL) {
1135 if (name[0] == '\0')
1138 val = strchr(name, '=');
1143 if (strcmp(name, "rw") == 0 || strcmp(name, "noro") == 0) {
1145 * The first time we mount the root file system,
1146 * we need to mount 'ro', so We need to ignore
1147 * 'rw' and 'noro' mount options.
1151 name_arg = strdup(name, M_MOUNT);
1154 val_arg = strdup(val, M_MOUNT);
1156 ma = mount_arg(ma, name_arg, val_arg,
1157 (val_arg != NULL ? -1 : 0));
1159 free(opts, M_MOUNT);