2 * Copyright (c) 2010 Marcel Moolenaar
3 * Copyright (c) 1999-2004 Poul-Henning Kamp
4 * Copyright (c) 1999 Michael Smith
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
7 * (c) UNIX System Laboratories, Inc.
8 * All or some portions of this file are derived from material licensed
9 * to the University of California by American Telephone and Telegraph
10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
11 * the permission of UNIX System Laboratories, Inc.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include "opt_rootdevname.h"
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
43 #include <sys/param.h>
46 #include <sys/fcntl.h>
48 #include <sys/kernel.h>
49 #include <sys/malloc.h>
50 #include <sys/mdioctl.h>
51 #include <sys/mount.h>
52 #include <sys/mutex.h>
53 #include <sys/namei.h>
56 #include <sys/filedesc.h>
57 #include <sys/reboot.h>
60 #include <sys/syscallsubr.h>
61 #include <sys/sysproto.h>
63 #include <sys/sysctl.h>
64 #include <sys/sysent.h>
65 #include <sys/systm.h>
66 #include <sys/vnode.h>
68 #include <geom/geom.h>
71 * The root filesystem is detailed in the kernel environment variable
72 * vfs.root.mountfrom, which is expected to be in the general format
74 * <vfsname>:[<path>][ <vfsname>:[<path>] ...]
75 * vfsname := the name of a VFS known to the kernel and capable
76 * of being mounted as root
77 * path := disk device name or other data used by the filesystem
78 * to locate its physical store
80 * If the environment variable vfs.root.mountfrom is a space separated list,
81 * each list element is tried in turn and the root filesystem will be mounted
82 * from the first one that suceeds.
84 * The environment variable vfs.root.mountfrom.options is a comma delimited
85 * set of string mount options. These mount options must be parseable
86 * by nmount() in the kernel.
89 static int parse_mount(char **);
90 static struct mntarg *parse_mountroot_options(struct mntarg *, const char *);
93 * The vnode of the system's root (/ in the filesystem, without chroot
96 struct vnode *rootvnode;
98 char *rootdevnames[2] = {NULL, NULL};
100 struct root_hold_token {
102 LIST_ENTRY(root_hold_token) list;
105 static LIST_HEAD(, root_hold_token) root_holds =
106 LIST_HEAD_INITIALIZER(root_holds);
115 static enum action root_mount_onfail = A_CONTINUE;
117 static int root_mount_mddev;
118 static int root_mount_complete;
120 /* By default wait up to 3 seconds for devices to appear. */
121 static int root_mount_timeout = 3;
123 struct root_hold_token *
124 root_mount_hold(const char *identifier)
126 struct root_hold_token *h;
131 h = malloc(sizeof *h, M_DEVBUF, M_ZERO | M_WAITOK);
133 mtx_lock(&mountlist_mtx);
134 LIST_INSERT_HEAD(&root_holds, h, list);
135 mtx_unlock(&mountlist_mtx);
140 root_mount_rel(struct root_hold_token *h)
145 mtx_lock(&mountlist_mtx);
146 LIST_REMOVE(h, list);
148 mtx_unlock(&mountlist_mtx);
156 /* No mutex is acquired here because int stores are atomic. */
157 return (root_mount_complete);
161 root_mount_wait(void)
165 * Panic on an obvious deadlock - the function can't be called from
166 * a thread which is doing the whole SYSINIT stuff.
168 KASSERT(curthread->td_proc->p_pid != 0,
169 ("root_mount_wait: cannot be called from the swapper thread"));
170 mtx_lock(&mountlist_mtx);
171 while (!root_mount_complete) {
172 msleep(&root_mount_complete, &mountlist_mtx, PZERO, "rootwait",
175 mtx_unlock(&mountlist_mtx);
183 if (VFS_ROOT(TAILQ_FIRST(&mountlist), LK_EXCLUSIVE, &rootvnode))
184 panic("Cannot find root vnode");
186 VOP_UNLOCK(rootvnode, 0);
188 p = curthread->td_proc;
189 FILEDESC_XLOCK(p->p_fd);
191 if (p->p_fd->fd_cdir != NULL)
192 vrele(p->p_fd->fd_cdir);
193 p->p_fd->fd_cdir = rootvnode;
196 if (p->p_fd->fd_rdir != NULL)
197 vrele(p->p_fd->fd_rdir);
198 p->p_fd->fd_rdir = rootvnode;
201 FILEDESC_XUNLOCK(p->p_fd);
205 vfs_mountroot_devfs(struct thread *td, struct mount **mpp)
207 struct vfsoptlist *opts;
208 struct vfsconf *vfsp;
214 vfsp = vfs_byname("devfs");
215 KASSERT(vfsp != NULL, ("Could not find devfs by name"));
219 mp = vfs_mount_alloc(NULLVP, vfsp, "/dev", td->td_ucred);
221 error = VFS_MOUNT(mp);
222 KASSERT(error == 0, ("VFS_MOUNT(devfs) failed %d", error));
226 opts = malloc(sizeof(struct vfsoptlist), M_MOUNT, M_WAITOK);
230 mtx_lock(&mountlist_mtx);
231 TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
232 mtx_unlock(&mountlist_mtx);
237 error = kern_symlink(td, "/", "dev", UIO_SYSSPACE);
239 printf("kern_symlink /dev -> / returns %d\n", error);
245 vfs_mountroot_shuffle(struct thread *td, struct mount *mpdevfs)
248 struct mount *mporoot, *mpnroot;
249 struct vnode *vp, *vporoot, *vpdevfs;
253 mpnroot = TAILQ_NEXT(mpdevfs, mnt_list);
255 /* Shuffle the mountlist. */
256 mtx_lock(&mountlist_mtx);
257 mporoot = TAILQ_FIRST(&mountlist);
258 TAILQ_REMOVE(&mountlist, mpdevfs, mnt_list);
259 if (mporoot != mpdevfs) {
260 TAILQ_REMOVE(&mountlist, mpnroot, mnt_list);
261 TAILQ_INSERT_HEAD(&mountlist, mpnroot, mnt_list);
263 TAILQ_INSERT_TAIL(&mountlist, mpdevfs, mnt_list);
264 mtx_unlock(&mountlist_mtx);
266 cache_purgevfs(mporoot);
267 if (mporoot != mpdevfs)
268 cache_purgevfs(mpdevfs);
270 VFS_ROOT(mporoot, LK_EXCLUSIVE, &vporoot);
273 vporoot->v_iflag &= ~VI_MOUNT;
275 vporoot->v_mountedhere = NULL;
276 mporoot->mnt_flag &= ~MNT_ROOTFS;
277 mporoot->mnt_vnodecovered = NULL;
280 /* Set up the new rootvnode, and purge the cache */
281 mpnroot->mnt_vnodecovered = NULL;
283 cache_purgevfs(rootvnode->v_mount);
285 if (mporoot != mpdevfs) {
286 /* Remount old root under /.mount or /mnt */
288 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
292 NDFREE(&nd, NDF_ONLY_PNBUF);
294 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE,
300 error = (vp->v_type == VDIR) ? 0 : ENOTDIR;
302 error = vinvalbuf(vp, V_SAVE, 0, 0);
305 mporoot->mnt_vnodecovered = vp;
306 vp->v_mountedhere = mporoot;
307 strlcpy(mporoot->mnt_stat.f_mntonname,
313 NDFREE(&nd, NDF_ONLY_PNBUF);
315 if (error && bootverbose)
316 printf("mountroot: unable to remount previous root "
317 "under /.mount or /mnt (error %d).\n", error);
320 /* Remount devfs under /dev */
321 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, "/dev", td);
325 error = (vp->v_type == VDIR) ? 0 : ENOTDIR;
327 error = vinvalbuf(vp, V_SAVE, 0, 0);
329 vpdevfs = mpdevfs->mnt_vnodecovered;
330 if (vpdevfs != NULL) {
331 cache_purge(vpdevfs);
332 vpdevfs->v_mountedhere = NULL;
335 mpdevfs->mnt_vnodecovered = vp;
336 vp->v_mountedhere = mpdevfs;
341 if (error && bootverbose)
342 printf("mountroot: unable to remount devfs under /dev "
343 "(error %d).\n", error);
344 NDFREE(&nd, NDF_ONLY_PNBUF);
346 if (mporoot == mpdevfs) {
348 /* Unlink the no longer needed /dev/dev -> / symlink */
349 error = kern_unlink(td, "/dev/dev", UIO_SYSSPACE);
350 if (error && bootverbose)
351 printf("mountroot: unable to unlink /dev/dev "
352 "(error %d)\n", error);
359 * Configuration parser.
362 /* Parser character classes. */
363 #define CC_WHITESPACE -1
364 #define CC_NONWHITESPACE -2
371 parse_peek(char **conf)
378 parse_poke(char **conf, int c)
385 parse_advance(char **conf)
395 return ((c == ' ' || c == '\t' || c == '\n') ? 1 : 0);
399 parse_skipto(char **conf, int mc)
404 c = parse_peek(conf);
409 match = (c == ' ' || c == '\t' || c == '\n') ? 1 : 0;
411 case CC_NONWHITESPACE:
414 match = (c != ' ' && c != '\t') ? 1 : 0;
417 match = (c == mc) ? 1 : 0;
428 parse_token(char **conf, char **tok)
435 error = parse_skipto(conf, CC_NONWHITESPACE);
439 error = parse_skipto(conf, CC_WHITESPACE);
441 *tok = malloc(len + 1, M_TEMP, M_WAITOK | M_ZERO);
447 parse_dir_ask_printenv(const char *var)
453 printf(" %s=%s\n", var, val);
459 parse_dir_ask(char **conf)
465 printf("\nLoader variables:\n");
466 parse_dir_ask_printenv("vfs.root.mountfrom");
467 parse_dir_ask_printenv("vfs.root.mountfrom.options");
469 printf("\nManual root filesystem specification:\n");
470 printf(" <fstype>:<device> [options]\n");
471 printf(" Mount <device> using filesystem <fstype>\n");
472 printf(" and with the specified (optional) option list.\n");
474 printf(" eg. ufs:/dev/da0s1a\n");
475 printf(" zfs:tank\n");
476 printf(" cd9660:/dev/acd0 ro\n");
477 printf(" (which is equivalent to: ");
478 printf("mount -t cd9660 -o ro /dev/acd0 /)\n");
480 printf(" ? List valid disk boot devices\n");
481 printf(" . Yield 1 second (for background tasks)\n");
482 printf(" <empty line> Abort manual input\n");
486 printf("\nmountroot> ");
487 cngets(name, sizeof(name), GETS_ECHO);
490 if (name[0] == '?' && name[1] == '\0') {
491 printf("\nList of GEOM managed disk devices:\n ");
495 if (name[0] == '.' && name[1] == '\0') {
500 error = parse_mount(&mnt);
502 printf("Invalid file system specification.\n");
503 } while (error != 0);
509 parse_dir_md(char **conf)
513 struct md_ioctl *mdio;
519 error = parse_token(conf, &tok);
524 mdio = malloc(sizeof(*mdio) + len + 1, M_TEMP, M_WAITOK | M_ZERO);
525 path = (void *)(mdio + 1);
526 bcopy(tok, path, len);
529 /* Get file status. */
530 error = kern_stat(td, path, UIO_SYSSPACE, &sb);
534 /* Open /dev/mdctl so that we can attach/detach. */
535 error = kern_open(td, "/dev/" MDCTL_NAME, UIO_SYSSPACE, O_RDWR, 0);
539 fd = td->td_retval[0];
540 mdio->md_version = MDIOVERSION;
541 mdio->md_type = MD_VNODE;
543 if (root_mount_mddev != -1) {
544 mdio->md_unit = root_mount_mddev;
546 error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio);
548 /* Ignore errors. We don't care. */
549 root_mount_mddev = -1;
552 mdio->md_file = (void *)(mdio + 1);
553 mdio->md_options = MD_AUTOUNIT | MD_READONLY;
554 mdio->md_mediasize = sb.st_size;
557 error = kern_ioctl(td, fd, MDIOCATTACH, (void *)mdio);
562 if (mdio->md_unit > 9) {
563 printf("rootmount: too many md units\n");
564 mdio->md_file = NULL;
565 mdio->md_options = 0;
566 mdio->md_mediasize = 0;
568 error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio);
570 /* Ignore errors. We don't care. */
575 root_mount_mddev = mdio->md_unit;
576 printf(MD_NAME "%u attached to %s\n", root_mount_mddev, mdio->md_file);
578 error = kern_close(td, fd);
586 parse_dir_onfail(char **conf)
591 error = parse_token(conf, &action);
595 if (!strcmp(action, "continue"))
596 root_mount_onfail = A_CONTINUE;
597 else if (!strcmp(action, "panic"))
598 root_mount_onfail = A_PANIC;
599 else if (!strcmp(action, "reboot"))
600 root_mount_onfail = A_REBOOT;
601 else if (!strcmp(action, "retry"))
602 root_mount_onfail = A_RETRY;
604 printf("rootmount: %s: unknown action\n", action);
608 free(action, M_TEMP);
613 parse_dir_timeout(char **conf)
619 error = parse_token(conf, &tok);
623 secs = strtol(tok, &endtok, 0);
624 error = (secs < 0 || *endtok != '\0') ? EINVAL : 0;
626 root_mount_timeout = secs;
632 parse_directive(char **conf)
637 error = parse_token(conf, &dir);
641 if (strcmp(dir, ".ask") == 0)
642 error = parse_dir_ask(conf);
643 else if (strcmp(dir, ".md") == 0)
644 error = parse_dir_md(conf);
645 else if (strcmp(dir, ".onfail") == 0)
646 error = parse_dir_onfail(conf);
647 else if (strcmp(dir, ".timeout") == 0)
648 error = parse_dir_timeout(conf);
650 printf("mountroot: invalid directive `%s'\n", dir);
651 /* Ignore the rest of the line. */
652 (void)parse_skipto(conf, '\n');
660 parse_mount_dev_present(const char *dev)
665 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, dev, curthread);
669 NDFREE(&nd, NDF_ONLY_PNBUF);
670 return (error != 0) ? 0 : 1;
675 parse_mount(char **conf)
679 char *dev, *fs, *opts, *tok;
680 int delay, error, timeout;
682 error = parse_token(conf, &tok);
686 error = parse_skipto(&tok, ':');
691 parse_poke(&tok, '\0');
695 if (root_mount_mddev != -1) {
696 /* Handle substitution for the md unit number. */
697 tok = strstr(dev, "md#");
699 tok[2] = '0' + root_mount_mddev;
703 error = parse_token(conf, &tok);
704 opts = (error == 0) ? tok : NULL;
706 printf("Trying to mount root from %s:%s [%s]...\n", fs, dev,
707 (opts != NULL) ? opts : "");
709 errmsg = malloc(ERRMSGL, M_TEMP, M_WAITOK | M_ZERO);
711 if (vfs_byname(fs) == NULL) {
712 strlcpy(errmsg, "unknown file system", sizeof(errmsg));
717 if (strcmp(fs, "zfs") != 0 && dev[0] != '\0' &&
718 !parse_mount_dev_present(dev)) {
719 printf("mountroot: waiting for device %s ...\n", dev);
721 timeout = root_mount_timeout * hz;
723 pause("rmdev", delay);
725 } while (timeout > 0 && !parse_mount_dev_present(dev));
733 ma = mount_arg(ma, "fstype", fs, -1);
734 ma = mount_arg(ma, "fspath", "/", -1);
735 ma = mount_arg(ma, "from", dev, -1);
736 ma = mount_arg(ma, "errmsg", errmsg, ERRMSGL);
737 ma = mount_arg(ma, "ro", NULL, 0);
738 ma = parse_mountroot_options(ma, opts);
739 error = kernel_mount(ma, MNT_ROOTFS);
743 printf("Mounting from %s:%s failed with error %d",
745 if (errmsg[0] != '\0')
746 printf(": %s", errmsg);
750 free(errmsg, M_TEMP);
753 /* kernel_mount can return -1 on error. */
754 return ((error < 0) ? EDOOFUS : error);
759 vfs_mountroot_parse(struct sbuf *sb, struct mount *mpdevfs)
765 root_mount_mddev = -1;
768 conf = sbuf_data(sb);
769 mp = TAILQ_NEXT(mpdevfs, mnt_list);
770 error = (mp == NULL) ? 0 : EDOOFUS;
771 root_mount_onfail = A_CONTINUE;
773 error = parse_skipto(&conf, CC_NONWHITESPACE);
774 if (error == PE_EOL) {
775 parse_advance(&conf);
780 switch (parse_peek(&conf)) {
782 error = parse_skipto(&conf, '\n');
785 error = parse_directive(&conf);
788 error = parse_mount(&conf);
793 /* Ignore any trailing garbage on the line. */
794 if (parse_peek(&conf) != '\n') {
795 printf("mountroot: advancing to next directive...\n");
796 (void)parse_skipto(&conf, '\n');
798 mp = TAILQ_NEXT(mpdevfs, mnt_list);
804 * We failed to mount (a new) root.
806 switch (root_mount_onfail) {
810 panic("mountroot: unable to (re-)mount root.");
815 kern_reboot(RB_NOSYNC);
823 vfs_mountroot_conf0(struct sbuf *sb)
825 char *s, *tok, *mnt, *opt;
828 sbuf_printf(sb, ".onfail panic\n");
829 sbuf_printf(sb, ".timeout %d\n", root_mount_timeout);
830 if (boothowto & RB_ASKNAME)
831 sbuf_printf(sb, ".ask\n");
833 if (boothowto & RB_DFLTROOT)
834 sbuf_printf(sb, "%s\n", ROOTDEVNAME);
836 if (boothowto & RB_CDROM) {
837 sbuf_printf(sb, "cd9660:/dev/cd0 ro\n");
838 sbuf_printf(sb, ".timeout 0\n");
839 sbuf_printf(sb, "cd9660:/dev/acd0 ro\n");
840 sbuf_printf(sb, ".timeout %d\n", root_mount_timeout);
842 s = getenv("vfs.root.mountfrom");
844 opt = getenv("vfs.root.mountfrom.options");
846 error = parse_token(&tok, &mnt);
848 sbuf_printf(sb, "%s %s\n", mnt,
849 (opt != NULL) ? opt : "");
851 error = parse_token(&tok, &mnt);
857 if (rootdevnames[0] != NULL)
858 sbuf_printf(sb, "%s\n", rootdevnames[0]);
859 if (rootdevnames[1] != NULL)
860 sbuf_printf(sb, "%s\n", rootdevnames[1]);
862 if (!(boothowto & RB_DFLTROOT))
863 sbuf_printf(sb, "%s\n", ROOTDEVNAME);
865 if (!(boothowto & RB_ASKNAME))
866 sbuf_printf(sb, ".ask\n");
870 vfs_mountroot_readconf(struct thread *td, struct sbuf *sb)
872 static char buf[128];
876 int error, flags, len, vfslocked;
878 NDINIT(&nd, LOOKUP, FOLLOW | MPSAFE, UIO_SYSSPACE,
881 error = vn_open(&nd, &flags, 0, NULL);
885 vfslocked = NDHASGIANT(&nd);
886 NDFREE(&nd, NDF_ONLY_PNBUF);
888 len = sizeof(buf) - 1;
890 error = vn_rdwr(UIO_READ, nd.ni_vp, buf, len, ofs,
891 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred,
897 buf[len - resid] = 0;
898 sbuf_printf(sb, "%s", buf);
902 VOP_UNLOCK(nd.ni_vp, 0);
903 vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
904 VFS_UNLOCK_GIANT(vfslocked);
909 vfs_mountroot_wait(void)
911 struct root_hold_token *h;
912 struct timeval lastfail;
920 mtx_lock(&mountlist_mtx);
921 if (LIST_EMPTY(&root_holds)) {
922 mtx_unlock(&mountlist_mtx);
925 if (ppsratecheck(&lastfail, &curfail, 1)) {
926 printf("Root mount waiting for:");
927 LIST_FOREACH(h, &root_holds, list)
928 printf(" %s", h->who);
931 msleep(&root_holds, &mountlist_mtx, PZERO | PDROP, "roothold",
947 vfs_mountroot_wait();
949 sb = sbuf_new_auto();
950 vfs_mountroot_conf0(sb);
953 error = vfs_mountroot_devfs(td, &mp);
955 error = vfs_mountroot_parse(sb, mp);
957 error = vfs_mountroot_shuffle(td, mp);
960 error = vfs_mountroot_readconf(td, sb);
969 * Iterate over all currently mounted file systems and use
970 * the time stamp found to check and/or initialize the RTC.
971 * Call inittodr() only once and pass it the largest of the
972 * timestamps we encounter.
975 mtx_lock(&mountlist_mtx);
976 mp = TAILQ_FIRST(&mountlist);
978 if (mp->mnt_time > timebase)
979 timebase = mp->mnt_time;
980 mp = TAILQ_NEXT(mp, mnt_list);
982 mtx_unlock(&mountlist_mtx);
985 /* Keep prison0's root in sync with the global rootvnode. */
986 mtx_lock(&prison0.pr_mtx);
987 prison0.pr_root = rootvnode;
988 vref(prison0.pr_root);
989 mtx_unlock(&prison0.pr_mtx);
991 mtx_lock(&mountlist_mtx);
992 atomic_store_rel_int(&root_mount_complete, 1);
993 wakeup(&root_mount_complete);
994 mtx_unlock(&mountlist_mtx);
996 EVENTHANDLER_INVOKE(mountroot);
999 static struct mntarg *
1000 parse_mountroot_options(struct mntarg *ma, const char *options)
1003 char *name, *name_arg;
1004 char *val, *val_arg;
1007 if (options == NULL || options[0] == '\0')
1010 p = opts = strdup(options, M_MOUNT);
1015 while((name = strsep(&p, ",")) != NULL) {
1016 if (name[0] == '\0')
1019 val = strchr(name, '=');
1024 if( strcmp(name, "rw") == 0 ||
1025 strcmp(name, "noro") == 0) {
1027 * The first time we mount the root file system,
1028 * we need to mount 'ro', so We need to ignore
1029 * 'rw' and 'noro' mount options.
1033 name_arg = strdup(name, M_MOUNT);
1036 val_arg = strdup(val, M_MOUNT);
1038 ma = mount_arg(ma, name_arg, val_arg,
1039 (val_arg != NULL ? -1 : 0));
1041 free(opts, M_MOUNT);