vfs_mountroot.c revision 253910
1213365Smarcel/*- 2214006Smarcel * Copyright (c) 2010 Marcel Moolenaar 3213365Smarcel * Copyright (c) 1999-2004 Poul-Henning Kamp 4213365Smarcel * Copyright (c) 1999 Michael Smith 5213365Smarcel * Copyright (c) 1989, 1993 6213365Smarcel * The Regents of the University of California. All rights reserved. 7213365Smarcel * (c) UNIX System Laboratories, Inc. 8213365Smarcel * All or some portions of this file are derived from material licensed 9213365Smarcel * to the University of California by American Telephone and Telegraph 10213365Smarcel * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11213365Smarcel * the permission of UNIX System Laboratories, Inc. 12213365Smarcel * 13213365Smarcel * Redistribution and use in source and binary forms, with or without 14213365Smarcel * modification, are permitted provided that the following conditions 15213365Smarcel * are met: 16213365Smarcel * 1. Redistributions of source code must retain the above copyright 17213365Smarcel * notice, this list of conditions and the following disclaimer. 18213365Smarcel * 2. Redistributions in binary form must reproduce the above copyright 19213365Smarcel * notice, this list of conditions and the following disclaimer in the 20213365Smarcel * documentation and/or other materials provided with the distribution. 21213365Smarcel * 4. Neither the name of the University nor the names of its contributors 22213365Smarcel * may be used to endorse or promote products derived from this software 23213365Smarcel * without specific prior written permission. 24213365Smarcel * 25213365Smarcel * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26213365Smarcel * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27213365Smarcel * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28213365Smarcel * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29213365Smarcel * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30213365Smarcel * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31213365Smarcel * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32213365Smarcel * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33213365Smarcel * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34213365Smarcel * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35213365Smarcel * SUCH DAMAGE. 36213365Smarcel */ 37213365Smarcel 38214006Smarcel#include "opt_rootdevname.h" 39214006Smarcel 40213365Smarcel#include <sys/cdefs.h> 41213365Smarcel__FBSDID("$FreeBSD: head/sys/kern/vfs_mountroot.c 253910 2013-08-03 04:25:25Z marcel $"); 42213365Smarcel 43213365Smarcel#include <sys/param.h> 44213365Smarcel#include <sys/conf.h> 45228634Savg#include <sys/cons.h> 46213365Smarcel#include <sys/fcntl.h> 47213365Smarcel#include <sys/jail.h> 48213365Smarcel#include <sys/kernel.h> 49213365Smarcel#include <sys/malloc.h> 50214006Smarcel#include <sys/mdioctl.h> 51213365Smarcel#include <sys/mount.h> 52213365Smarcel#include <sys/mutex.h> 53213365Smarcel#include <sys/namei.h> 54213365Smarcel#include <sys/priv.h> 55213365Smarcel#include <sys/proc.h> 56213365Smarcel#include <sys/filedesc.h> 57213365Smarcel#include <sys/reboot.h> 58223919Sae#include <sys/sbuf.h> 59214006Smarcel#include <sys/stat.h> 60213365Smarcel#include <sys/syscallsubr.h> 61213365Smarcel#include <sys/sysproto.h> 62213365Smarcel#include <sys/sx.h> 63213365Smarcel#include <sys/sysctl.h> 64213365Smarcel#include <sys/sysent.h> 65213365Smarcel#include <sys/systm.h> 66213365Smarcel#include <sys/vnode.h> 67213365Smarcel 68213365Smarcel#include <geom/geom.h> 69213365Smarcel 70213365Smarcel/* 71213365Smarcel * The root filesystem is detailed in the kernel environment variable 72213365Smarcel * vfs.root.mountfrom, which is expected to be in the general format 73213365Smarcel * 74213365Smarcel * <vfsname>:[<path>][ <vfsname>:[<path>] ...] 75213365Smarcel * vfsname := the name of a VFS known to the kernel and capable 76213365Smarcel * of being mounted as root 77213365Smarcel * path := disk device name or other data used by the filesystem 78213365Smarcel * to locate its physical store 79213365Smarcel * 80213365Smarcel * If the environment variable vfs.root.mountfrom is a space separated list, 81213365Smarcel * each list element is tried in turn and the root filesystem will be mounted 82213365Smarcel * from the first one that suceeds. 83213365Smarcel * 84213365Smarcel * The environment variable vfs.root.mountfrom.options is a comma delimited 85213365Smarcel * set of string mount options. These mount options must be parseable 86213365Smarcel * by nmount() in the kernel. 87213365Smarcel */ 88213365Smarcel 89214006Smarcelstatic int parse_mount(char **); 90214006Smarcelstatic struct mntarg *parse_mountroot_options(struct mntarg *, const char *); 91214006Smarcel 92213365Smarcel/* 93214006Smarcel * The vnode of the system's root (/ in the filesystem, without chroot 94214006Smarcel * active.) 95213365Smarcel */ 96214006Smarcelstruct vnode *rootvnode; 97213365Smarcel 98214006Smarcelchar *rootdevnames[2] = {NULL, NULL}; 99213365Smarcel 100213365Smarcelstruct root_hold_token { 101213365Smarcel const char *who; 102213365Smarcel LIST_ENTRY(root_hold_token) list; 103213365Smarcel}; 104213365Smarcel 105213365Smarcelstatic LIST_HEAD(, root_hold_token) root_holds = 106213365Smarcel LIST_HEAD_INITIALIZER(root_holds); 107213365Smarcel 108214006Smarcelenum action { 109214006Smarcel A_CONTINUE, 110214006Smarcel A_PANIC, 111214006Smarcel A_REBOOT, 112214006Smarcel A_RETRY 113214006Smarcel}; 114214006Smarcel 115214006Smarcelstatic enum action root_mount_onfail = A_CONTINUE; 116214006Smarcel 117214006Smarcelstatic int root_mount_mddev; 118213365Smarcelstatic int root_mount_complete; 119213365Smarcel 120214006Smarcel/* By default wait up to 3 seconds for devices to appear. */ 121214006Smarcelstatic int root_mount_timeout = 3; 122253910SmarcelTUNABLE_INT("vfs.mountroot.timeout", &root_mount_timeout); 123214006Smarcel 124213365Smarcelstruct root_hold_token * 125213365Smarcelroot_mount_hold(const char *identifier) 126213365Smarcel{ 127213365Smarcel struct root_hold_token *h; 128213365Smarcel 129213365Smarcel if (root_mounted()) 130213365Smarcel return (NULL); 131213365Smarcel 132213365Smarcel h = malloc(sizeof *h, M_DEVBUF, M_ZERO | M_WAITOK); 133213365Smarcel h->who = identifier; 134213365Smarcel mtx_lock(&mountlist_mtx); 135213365Smarcel LIST_INSERT_HEAD(&root_holds, h, list); 136213365Smarcel mtx_unlock(&mountlist_mtx); 137213365Smarcel return (h); 138213365Smarcel} 139213365Smarcel 140213365Smarcelvoid 141213365Smarcelroot_mount_rel(struct root_hold_token *h) 142213365Smarcel{ 143213365Smarcel 144213365Smarcel if (h == NULL) 145213365Smarcel return; 146213365Smarcel mtx_lock(&mountlist_mtx); 147213365Smarcel LIST_REMOVE(h, list); 148213365Smarcel wakeup(&root_holds); 149213365Smarcel mtx_unlock(&mountlist_mtx); 150213365Smarcel free(h, M_DEVBUF); 151213365Smarcel} 152213365Smarcel 153213365Smarcelint 154213365Smarcelroot_mounted(void) 155213365Smarcel{ 156213365Smarcel 157213365Smarcel /* No mutex is acquired here because int stores are atomic. */ 158213365Smarcel return (root_mount_complete); 159213365Smarcel} 160213365Smarcel 161213365Smarcelvoid 162213365Smarcelroot_mount_wait(void) 163213365Smarcel{ 164213365Smarcel 165213365Smarcel /* 166213365Smarcel * Panic on an obvious deadlock - the function can't be called from 167213365Smarcel * a thread which is doing the whole SYSINIT stuff. 168213365Smarcel */ 169213365Smarcel KASSERT(curthread->td_proc->p_pid != 0, 170213365Smarcel ("root_mount_wait: cannot be called from the swapper thread")); 171213365Smarcel mtx_lock(&mountlist_mtx); 172213365Smarcel while (!root_mount_complete) { 173213365Smarcel msleep(&root_mount_complete, &mountlist_mtx, PZERO, "rootwait", 174213365Smarcel hz); 175213365Smarcel } 176213365Smarcel mtx_unlock(&mountlist_mtx); 177213365Smarcel} 178213365Smarcel 179213365Smarcelstatic void 180213365Smarcelset_rootvnode(void) 181213365Smarcel{ 182213365Smarcel struct proc *p; 183213365Smarcel 184213365Smarcel if (VFS_ROOT(TAILQ_FIRST(&mountlist), LK_EXCLUSIVE, &rootvnode)) 185213365Smarcel panic("Cannot find root vnode"); 186213365Smarcel 187213365Smarcel VOP_UNLOCK(rootvnode, 0); 188213365Smarcel 189213365Smarcel p = curthread->td_proc; 190213365Smarcel FILEDESC_XLOCK(p->p_fd); 191213365Smarcel 192213365Smarcel if (p->p_fd->fd_cdir != NULL) 193213365Smarcel vrele(p->p_fd->fd_cdir); 194213365Smarcel p->p_fd->fd_cdir = rootvnode; 195213365Smarcel VREF(rootvnode); 196213365Smarcel 197213365Smarcel if (p->p_fd->fd_rdir != NULL) 198213365Smarcel vrele(p->p_fd->fd_rdir); 199213365Smarcel p->p_fd->fd_rdir = rootvnode; 200213365Smarcel VREF(rootvnode); 201213365Smarcel 202213365Smarcel FILEDESC_XUNLOCK(p->p_fd); 203213365Smarcel} 204213365Smarcel 205214006Smarcelstatic int 206214006Smarcelvfs_mountroot_devfs(struct thread *td, struct mount **mpp) 207213365Smarcel{ 208213365Smarcel struct vfsoptlist *opts; 209213365Smarcel struct vfsconf *vfsp; 210214006Smarcel struct mount *mp; 211213365Smarcel int error; 212213365Smarcel 213214006Smarcel *mpp = NULL; 214214006Smarcel 215213365Smarcel vfsp = vfs_byname("devfs"); 216213365Smarcel KASSERT(vfsp != NULL, ("Could not find devfs by name")); 217213365Smarcel if (vfsp == NULL) 218214006Smarcel return (ENOENT); 219213365Smarcel 220213365Smarcel mp = vfs_mount_alloc(NULLVP, vfsp, "/dev", td->td_ucred); 221213365Smarcel 222213365Smarcel error = VFS_MOUNT(mp); 223213365Smarcel KASSERT(error == 0, ("VFS_MOUNT(devfs) failed %d", error)); 224213365Smarcel if (error) 225214006Smarcel return (error); 226213365Smarcel 227213365Smarcel opts = malloc(sizeof(struct vfsoptlist), M_MOUNT, M_WAITOK); 228213365Smarcel TAILQ_INIT(opts); 229213365Smarcel mp->mnt_opt = opts; 230213365Smarcel 231213365Smarcel mtx_lock(&mountlist_mtx); 232213365Smarcel TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list); 233213365Smarcel mtx_unlock(&mountlist_mtx); 234213365Smarcel 235214006Smarcel *mpp = mp; 236213365Smarcel set_rootvnode(); 237213365Smarcel 238213365Smarcel error = kern_symlink(td, "/", "dev", UIO_SYSSPACE); 239213365Smarcel if (error) 240213365Smarcel printf("kern_symlink /dev -> / returns %d\n", error); 241214006Smarcel 242214006Smarcel return (error); 243213365Smarcel} 244213365Smarcel 245214006Smarcelstatic int 246214006Smarcelvfs_mountroot_shuffle(struct thread *td, struct mount *mpdevfs) 247213365Smarcel{ 248213365Smarcel struct nameidata nd; 249214006Smarcel struct mount *mporoot, *mpnroot; 250214006Smarcel struct vnode *vp, *vporoot, *vpdevfs; 251214006Smarcel char *fspath; 252213365Smarcel int error; 253213365Smarcel 254214006Smarcel mpnroot = TAILQ_NEXT(mpdevfs, mnt_list); 255214006Smarcel 256214006Smarcel /* Shuffle the mountlist. */ 257213365Smarcel mtx_lock(&mountlist_mtx); 258214006Smarcel mporoot = TAILQ_FIRST(&mountlist); 259214006Smarcel TAILQ_REMOVE(&mountlist, mpdevfs, mnt_list); 260214006Smarcel if (mporoot != mpdevfs) { 261214006Smarcel TAILQ_REMOVE(&mountlist, mpnroot, mnt_list); 262214006Smarcel TAILQ_INSERT_HEAD(&mountlist, mpnroot, mnt_list); 263214006Smarcel } 264214006Smarcel TAILQ_INSERT_TAIL(&mountlist, mpdevfs, mnt_list); 265213365Smarcel mtx_unlock(&mountlist_mtx); 266213365Smarcel 267214006Smarcel cache_purgevfs(mporoot); 268214006Smarcel if (mporoot != mpdevfs) 269214006Smarcel cache_purgevfs(mpdevfs); 270213365Smarcel 271214006Smarcel VFS_ROOT(mporoot, LK_EXCLUSIVE, &vporoot); 272214006Smarcel 273214006Smarcel VI_LOCK(vporoot); 274214006Smarcel vporoot->v_iflag &= ~VI_MOUNT; 275214006Smarcel VI_UNLOCK(vporoot); 276214006Smarcel vporoot->v_mountedhere = NULL; 277214006Smarcel mporoot->mnt_flag &= ~MNT_ROOTFS; 278214006Smarcel mporoot->mnt_vnodecovered = NULL; 279214006Smarcel vput(vporoot); 280214006Smarcel 281214006Smarcel /* Set up the new rootvnode, and purge the cache */ 282214006Smarcel mpnroot->mnt_vnodecovered = NULL; 283213365Smarcel set_rootvnode(); 284213365Smarcel cache_purgevfs(rootvnode->v_mount); 285213365Smarcel 286214006Smarcel if (mporoot != mpdevfs) { 287214006Smarcel /* Remount old root under /.mount or /mnt */ 288214006Smarcel fspath = "/.mount"; 289214006Smarcel NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, 290214006Smarcel fspath, td); 291214006Smarcel error = namei(&nd); 292214006Smarcel if (error) { 293214006Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 294214006Smarcel fspath = "/mnt"; 295214006Smarcel NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, 296214006Smarcel fspath, td); 297214006Smarcel error = namei(&nd); 298214006Smarcel } 299214006Smarcel if (!error) { 300214006Smarcel vp = nd.ni_vp; 301214006Smarcel error = (vp->v_type == VDIR) ? 0 : ENOTDIR; 302214006Smarcel if (!error) 303214006Smarcel error = vinvalbuf(vp, V_SAVE, 0, 0); 304214006Smarcel if (!error) { 305214006Smarcel cache_purge(vp); 306214006Smarcel mporoot->mnt_vnodecovered = vp; 307214006Smarcel vp->v_mountedhere = mporoot; 308214006Smarcel strlcpy(mporoot->mnt_stat.f_mntonname, 309214006Smarcel fspath, MNAMELEN); 310214006Smarcel VOP_UNLOCK(vp, 0); 311214006Smarcel } else 312214006Smarcel vput(vp); 313214006Smarcel } 314214006Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 315214006Smarcel 316214006Smarcel if (error && bootverbose) 317214006Smarcel printf("mountroot: unable to remount previous root " 318214006Smarcel "under /.mount or /mnt (error %d).\n", error); 319214006Smarcel } 320214006Smarcel 321214006Smarcel /* Remount devfs under /dev */ 322213365Smarcel NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, "/dev", td); 323213365Smarcel error = namei(&nd); 324214006Smarcel if (!error) { 325214006Smarcel vp = nd.ni_vp; 326214006Smarcel error = (vp->v_type == VDIR) ? 0 : ENOTDIR; 327214006Smarcel if (!error) 328214006Smarcel error = vinvalbuf(vp, V_SAVE, 0, 0); 329214006Smarcel if (!error) { 330214006Smarcel vpdevfs = mpdevfs->mnt_vnodecovered; 331214006Smarcel if (vpdevfs != NULL) { 332214006Smarcel cache_purge(vpdevfs); 333214006Smarcel vpdevfs->v_mountedhere = NULL; 334214006Smarcel vrele(vpdevfs); 335214006Smarcel } 336214006Smarcel mpdevfs->mnt_vnodecovered = vp; 337214006Smarcel vp->v_mountedhere = mpdevfs; 338214006Smarcel VOP_UNLOCK(vp, 0); 339214006Smarcel } else 340214006Smarcel vput(vp); 341213365Smarcel } 342214006Smarcel if (error && bootverbose) 343214006Smarcel printf("mountroot: unable to remount devfs under /dev " 344214006Smarcel "(error %d).\n", error); 345213365Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 346214006Smarcel 347214006Smarcel if (mporoot == mpdevfs) { 348214006Smarcel vfs_unbusy(mpdevfs); 349214006Smarcel /* Unlink the no longer needed /dev/dev -> / symlink */ 350214006Smarcel error = kern_unlink(td, "/dev/dev", UIO_SYSSPACE); 351214006Smarcel if (error && bootverbose) 352214006Smarcel printf("mountroot: unable to unlink /dev/dev " 353214006Smarcel "(error %d)\n", error); 354213365Smarcel } 355214006Smarcel 356214006Smarcel return (0); 357214006Smarcel} 358214006Smarcel 359214006Smarcel/* 360214006Smarcel * Configuration parser. 361214006Smarcel */ 362214006Smarcel 363214006Smarcel/* Parser character classes. */ 364214006Smarcel#define CC_WHITESPACE -1 365214006Smarcel#define CC_NONWHITESPACE -2 366214006Smarcel 367214006Smarcel/* Parse errors. */ 368214006Smarcel#define PE_EOF -1 369214006Smarcel#define PE_EOL -2 370214006Smarcel 371214006Smarcelstatic __inline int 372214006Smarcelparse_peek(char **conf) 373214006Smarcel{ 374214006Smarcel 375214006Smarcel return (**conf); 376214006Smarcel} 377214006Smarcel 378214006Smarcelstatic __inline void 379214006Smarcelparse_poke(char **conf, int c) 380214006Smarcel{ 381214006Smarcel 382214006Smarcel **conf = c; 383214006Smarcel} 384214006Smarcel 385214006Smarcelstatic __inline void 386214006Smarcelparse_advance(char **conf) 387214006Smarcel{ 388214006Smarcel 389214006Smarcel (*conf)++; 390214006Smarcel} 391214006Smarcel 392214006Smarcelstatic __inline int 393214006Smarcelparse_isspace(int c) 394214006Smarcel{ 395214006Smarcel 396214006Smarcel return ((c == ' ' || c == '\t' || c == '\n') ? 1 : 0); 397214006Smarcel} 398214006Smarcel 399214006Smarcelstatic int 400214006Smarcelparse_skipto(char **conf, int mc) 401214006Smarcel{ 402214006Smarcel int c, match; 403214006Smarcel 404214006Smarcel while (1) { 405214006Smarcel c = parse_peek(conf); 406214006Smarcel if (c == 0) 407214006Smarcel return (PE_EOF); 408214006Smarcel switch (mc) { 409214006Smarcel case CC_WHITESPACE: 410214006Smarcel match = (c == ' ' || c == '\t' || c == '\n') ? 1 : 0; 411214006Smarcel break; 412214006Smarcel case CC_NONWHITESPACE: 413214006Smarcel if (c == '\n') 414214006Smarcel return (PE_EOL); 415214006Smarcel match = (c != ' ' && c != '\t') ? 1 : 0; 416214006Smarcel break; 417214006Smarcel default: 418214006Smarcel match = (c == mc) ? 1 : 0; 419214006Smarcel break; 420214006Smarcel } 421214006Smarcel if (match) 422214006Smarcel break; 423214006Smarcel parse_advance(conf); 424213365Smarcel } 425214006Smarcel return (0); 426214006Smarcel} 427213365Smarcel 428214006Smarcelstatic int 429214006Smarcelparse_token(char **conf, char **tok) 430214006Smarcel{ 431214006Smarcel char *p; 432214006Smarcel size_t len; 433214006Smarcel int error; 434214006Smarcel 435214006Smarcel *tok = NULL; 436214006Smarcel error = parse_skipto(conf, CC_NONWHITESPACE); 437213365Smarcel if (error) 438214006Smarcel return (error); 439214006Smarcel p = *conf; 440214006Smarcel error = parse_skipto(conf, CC_WHITESPACE); 441214006Smarcel len = *conf - p; 442214006Smarcel *tok = malloc(len + 1, M_TEMP, M_WAITOK | M_ZERO); 443214006Smarcel bcopy(p, *tok, len); 444214006Smarcel return (0); 445213365Smarcel} 446213365Smarcel 447214006Smarcelstatic void 448214006Smarcelparse_dir_ask_printenv(const char *var) 449213365Smarcel{ 450214006Smarcel char *val; 451213365Smarcel 452214006Smarcel val = getenv(var); 453214006Smarcel if (val != NULL) { 454214006Smarcel printf(" %s=%s\n", var, val); 455214006Smarcel freeenv(val); 456214006Smarcel } 457214006Smarcel} 458213365Smarcel 459214006Smarcelstatic int 460214006Smarcelparse_dir_ask(char **conf) 461214006Smarcel{ 462214006Smarcel char name[80]; 463214006Smarcel char *mnt; 464214006Smarcel int error; 465213365Smarcel 466214006Smarcel printf("\nLoader variables:\n"); 467214006Smarcel parse_dir_ask_printenv("vfs.root.mountfrom"); 468214006Smarcel parse_dir_ask_printenv("vfs.root.mountfrom.options"); 469213365Smarcel 470214006Smarcel printf("\nManual root filesystem specification:\n"); 471214006Smarcel printf(" <fstype>:<device> [options]\n"); 472214006Smarcel printf(" Mount <device> using filesystem <fstype>\n"); 473214006Smarcel printf(" and with the specified (optional) option list.\n"); 474214006Smarcel printf("\n"); 475214006Smarcel printf(" eg. ufs:/dev/da0s1a\n"); 476214006Smarcel printf(" zfs:tank\n"); 477214006Smarcel printf(" cd9660:/dev/acd0 ro\n"); 478214006Smarcel printf(" (which is equivalent to: "); 479214006Smarcel printf("mount -t cd9660 -o ro /dev/acd0 /)\n"); 480214006Smarcel printf("\n"); 481214006Smarcel printf(" ? List valid disk boot devices\n"); 482214006Smarcel printf(" . Yield 1 second (for background tasks)\n"); 483214006Smarcel printf(" <empty line> Abort manual input\n"); 484214006Smarcel 485226673Smarcel do { 486226673Smarcel error = EINVAL; 487226673Smarcel printf("\nmountroot> "); 488228634Savg cngets(name, sizeof(name), GETS_ECHO); 489226673Smarcel if (name[0] == '\0') 490226673Smarcel break; 491226673Smarcel if (name[0] == '?' && name[1] == '\0') { 492226673Smarcel printf("\nList of GEOM managed disk devices:\n "); 493226673Smarcel g_dev_print(); 494226673Smarcel continue; 495226673Smarcel } 496226673Smarcel if (name[0] == '.' && name[1] == '\0') { 497226673Smarcel pause("rmask", hz); 498226673Smarcel continue; 499226673Smarcel } 500226673Smarcel mnt = name; 501226673Smarcel error = parse_mount(&mnt); 502226673Smarcel if (error == -1) 503226673Smarcel printf("Invalid file system specification.\n"); 504226673Smarcel } while (error != 0); 505226673Smarcel 506214006Smarcel return (error); 507214006Smarcel} 508213365Smarcel 509214006Smarcelstatic int 510214006Smarcelparse_dir_md(char **conf) 511214006Smarcel{ 512214006Smarcel struct stat sb; 513214006Smarcel struct thread *td; 514214006Smarcel struct md_ioctl *mdio; 515214006Smarcel char *path, *tok; 516214006Smarcel int error, fd, len; 517213365Smarcel 518214006Smarcel td = curthread; 519214006Smarcel 520214006Smarcel error = parse_token(conf, &tok); 521214006Smarcel if (error) 522214006Smarcel return (error); 523214006Smarcel 524214006Smarcel len = strlen(tok); 525214006Smarcel mdio = malloc(sizeof(*mdio) + len + 1, M_TEMP, M_WAITOK | M_ZERO); 526214006Smarcel path = (void *)(mdio + 1); 527214006Smarcel bcopy(tok, path, len); 528214006Smarcel free(tok, M_TEMP); 529214006Smarcel 530214006Smarcel /* Get file status. */ 531214006Smarcel error = kern_stat(td, path, UIO_SYSSPACE, &sb); 532214006Smarcel if (error) 533214006Smarcel goto out; 534214006Smarcel 535214006Smarcel /* Open /dev/mdctl so that we can attach/detach. */ 536214006Smarcel error = kern_open(td, "/dev/" MDCTL_NAME, UIO_SYSSPACE, O_RDWR, 0); 537214006Smarcel if (error) 538214006Smarcel goto out; 539214006Smarcel 540214006Smarcel fd = td->td_retval[0]; 541214006Smarcel mdio->md_version = MDIOVERSION; 542214006Smarcel mdio->md_type = MD_VNODE; 543214006Smarcel 544214006Smarcel if (root_mount_mddev != -1) { 545214006Smarcel mdio->md_unit = root_mount_mddev; 546214006Smarcel DROP_GIANT(); 547214006Smarcel error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio); 548214006Smarcel PICKUP_GIANT(); 549214006Smarcel /* Ignore errors. We don't care. */ 550214006Smarcel root_mount_mddev = -1; 551214006Smarcel } 552214006Smarcel 553214006Smarcel mdio->md_file = (void *)(mdio + 1); 554214006Smarcel mdio->md_options = MD_AUTOUNIT | MD_READONLY; 555214006Smarcel mdio->md_mediasize = sb.st_size; 556214006Smarcel mdio->md_unit = 0; 557214006Smarcel DROP_GIANT(); 558214006Smarcel error = kern_ioctl(td, fd, MDIOCATTACH, (void *)mdio); 559214006Smarcel PICKUP_GIANT(); 560214006Smarcel if (error) 561214006Smarcel goto out; 562214006Smarcel 563214006Smarcel if (mdio->md_unit > 9) { 564214006Smarcel printf("rootmount: too many md units\n"); 565214006Smarcel mdio->md_file = NULL; 566214006Smarcel mdio->md_options = 0; 567214006Smarcel mdio->md_mediasize = 0; 568214006Smarcel DROP_GIANT(); 569214006Smarcel error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio); 570214006Smarcel PICKUP_GIANT(); 571214006Smarcel /* Ignore errors. We don't care. */ 572214006Smarcel error = ERANGE; 573214006Smarcel goto out; 574214006Smarcel } 575214006Smarcel 576214006Smarcel root_mount_mddev = mdio->md_unit; 577214006Smarcel printf(MD_NAME "%u attached to %s\n", root_mount_mddev, mdio->md_file); 578214006Smarcel 579214006Smarcel error = kern_close(td, fd); 580214006Smarcel 581214006Smarcel out: 582214006Smarcel free(mdio, M_TEMP); 583214006Smarcel return (error); 584214006Smarcel} 585214006Smarcel 586214006Smarcelstatic int 587214006Smarcelparse_dir_onfail(char **conf) 588214006Smarcel{ 589214006Smarcel char *action; 590214006Smarcel int error; 591214006Smarcel 592214006Smarcel error = parse_token(conf, &action); 593214006Smarcel if (error) 594214006Smarcel return (error); 595214006Smarcel 596214006Smarcel if (!strcmp(action, "continue")) 597214006Smarcel root_mount_onfail = A_CONTINUE; 598214006Smarcel else if (!strcmp(action, "panic")) 599214006Smarcel root_mount_onfail = A_PANIC; 600214006Smarcel else if (!strcmp(action, "reboot")) 601214006Smarcel root_mount_onfail = A_REBOOT; 602214006Smarcel else if (!strcmp(action, "retry")) 603214006Smarcel root_mount_onfail = A_RETRY; 604214006Smarcel else { 605214006Smarcel printf("rootmount: %s: unknown action\n", action); 606214006Smarcel error = EINVAL; 607214006Smarcel } 608214006Smarcel 609214006Smarcel free(action, M_TEMP); 610214006Smarcel return (0); 611214006Smarcel} 612214006Smarcel 613214006Smarcelstatic int 614214006Smarcelparse_dir_timeout(char **conf) 615214006Smarcel{ 616214006Smarcel char *tok, *endtok; 617214006Smarcel long secs; 618214006Smarcel int error; 619214006Smarcel 620214006Smarcel error = parse_token(conf, &tok); 621214006Smarcel if (error) 622214006Smarcel return (error); 623214006Smarcel 624214006Smarcel secs = strtol(tok, &endtok, 0); 625214006Smarcel error = (secs < 0 || *endtok != '\0') ? EINVAL : 0; 626214006Smarcel if (!error) 627214006Smarcel root_mount_timeout = secs; 628214006Smarcel free(tok, M_TEMP); 629214006Smarcel return (error); 630214006Smarcel} 631214006Smarcel 632214006Smarcelstatic int 633214006Smarcelparse_directive(char **conf) 634214006Smarcel{ 635214006Smarcel char *dir; 636214006Smarcel int error; 637214006Smarcel 638214006Smarcel error = parse_token(conf, &dir); 639214006Smarcel if (error) 640214006Smarcel return (error); 641214006Smarcel 642214006Smarcel if (strcmp(dir, ".ask") == 0) 643214006Smarcel error = parse_dir_ask(conf); 644214006Smarcel else if (strcmp(dir, ".md") == 0) 645214006Smarcel error = parse_dir_md(conf); 646214006Smarcel else if (strcmp(dir, ".onfail") == 0) 647214006Smarcel error = parse_dir_onfail(conf); 648214006Smarcel else if (strcmp(dir, ".timeout") == 0) 649214006Smarcel error = parse_dir_timeout(conf); 650214006Smarcel else { 651214006Smarcel printf("mountroot: invalid directive `%s'\n", dir); 652214006Smarcel /* Ignore the rest of the line. */ 653214006Smarcel (void)parse_skipto(conf, '\n'); 654214006Smarcel error = EINVAL; 655214006Smarcel } 656214006Smarcel free(dir, M_TEMP); 657214006Smarcel return (error); 658214006Smarcel} 659214006Smarcel 660214006Smarcelstatic int 661214006Smarcelparse_mount_dev_present(const char *dev) 662214006Smarcel{ 663214006Smarcel struct nameidata nd; 664214006Smarcel int error; 665214006Smarcel 666214006Smarcel NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, dev, curthread); 667214006Smarcel error = namei(&nd); 668214006Smarcel if (!error) 669214006Smarcel vput(nd.ni_vp); 670214006Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 671214006Smarcel return (error != 0) ? 0 : 1; 672214006Smarcel} 673214006Smarcel 674243868Skib#define ERRMSGL 255 675214006Smarcelstatic int 676214006Smarcelparse_mount(char **conf) 677214006Smarcel{ 678243868Skib char *errmsg; 679214006Smarcel struct mntarg *ma; 680214006Smarcel char *dev, *fs, *opts, *tok; 681214006Smarcel int delay, error, timeout; 682214006Smarcel 683214006Smarcel error = parse_token(conf, &tok); 684214006Smarcel if (error) 685214006Smarcel return (error); 686214006Smarcel fs = tok; 687214006Smarcel error = parse_skipto(&tok, ':'); 688214006Smarcel if (error) { 689214006Smarcel free(fs, M_TEMP); 690214006Smarcel return (error); 691214006Smarcel } 692214006Smarcel parse_poke(&tok, '\0'); 693214006Smarcel parse_advance(&tok); 694214006Smarcel dev = tok; 695214006Smarcel 696214006Smarcel if (root_mount_mddev != -1) { 697214006Smarcel /* Handle substitution for the md unit number. */ 698214006Smarcel tok = strstr(dev, "md#"); 699214006Smarcel if (tok != NULL) 700214006Smarcel tok[2] = '0' + root_mount_mddev; 701214006Smarcel } 702214006Smarcel 703214006Smarcel /* Parse options. */ 704214006Smarcel error = parse_token(conf, &tok); 705214006Smarcel opts = (error == 0) ? tok : NULL; 706214006Smarcel 707214006Smarcel printf("Trying to mount root from %s:%s [%s]...\n", fs, dev, 708214006Smarcel (opts != NULL) ? opts : ""); 709214006Smarcel 710243868Skib errmsg = malloc(ERRMSGL, M_TEMP, M_WAITOK | M_ZERO); 711214006Smarcel 712214006Smarcel if (vfs_byname(fs) == NULL) { 713214006Smarcel strlcpy(errmsg, "unknown file system", sizeof(errmsg)); 714214006Smarcel error = ENOENT; 715214006Smarcel goto out; 716214006Smarcel } 717214006Smarcel 718253847Sian if (strcmp(fs, "zfs") != 0 && strstr(fs, "nfs") == NULL && 719253847Sian dev[0] != '\0' && !parse_mount_dev_present(dev)) { 720214006Smarcel printf("mountroot: waiting for device %s ...\n", dev); 721214006Smarcel delay = hz / 10; 722214006Smarcel timeout = root_mount_timeout * hz; 723214006Smarcel do { 724214006Smarcel pause("rmdev", delay); 725214006Smarcel timeout -= delay; 726214006Smarcel } while (timeout > 0 && !parse_mount_dev_present(dev)); 727214006Smarcel if (timeout <= 0) { 728214006Smarcel error = ENODEV; 729214006Smarcel goto out; 730214006Smarcel } 731214006Smarcel } 732214006Smarcel 733214006Smarcel ma = NULL; 734214006Smarcel ma = mount_arg(ma, "fstype", fs, -1); 735214006Smarcel ma = mount_arg(ma, "fspath", "/", -1); 736214006Smarcel ma = mount_arg(ma, "from", dev, -1); 737243868Skib ma = mount_arg(ma, "errmsg", errmsg, ERRMSGL); 738214006Smarcel ma = mount_arg(ma, "ro", NULL, 0); 739214006Smarcel ma = parse_mountroot_options(ma, opts); 740214006Smarcel error = kernel_mount(ma, MNT_ROOTFS); 741214006Smarcel 742214006Smarcel out: 743214006Smarcel if (error) { 744214006Smarcel printf("Mounting from %s:%s failed with error %d", 745214006Smarcel fs, dev, error); 746214006Smarcel if (errmsg[0] != '\0') 747214006Smarcel printf(": %s", errmsg); 748214006Smarcel printf(".\n"); 749214006Smarcel } 750214006Smarcel free(fs, M_TEMP); 751243868Skib free(errmsg, M_TEMP); 752214006Smarcel if (opts != NULL) 753214006Smarcel free(opts, M_TEMP); 754214006Smarcel /* kernel_mount can return -1 on error. */ 755214006Smarcel return ((error < 0) ? EDOOFUS : error); 756214006Smarcel} 757243868Skib#undef ERRMSGL 758214006Smarcel 759214006Smarcelstatic int 760214006Smarcelvfs_mountroot_parse(struct sbuf *sb, struct mount *mpdevfs) 761214006Smarcel{ 762214006Smarcel struct mount *mp; 763214006Smarcel char *conf; 764214006Smarcel int error; 765214006Smarcel 766214006Smarcel root_mount_mddev = -1; 767214006Smarcel 768214006Smarcelretry: 769214006Smarcel conf = sbuf_data(sb); 770214006Smarcel mp = TAILQ_NEXT(mpdevfs, mnt_list); 771214006Smarcel error = (mp == NULL) ? 0 : EDOOFUS; 772214006Smarcel root_mount_onfail = A_CONTINUE; 773214006Smarcel while (mp == NULL) { 774214006Smarcel error = parse_skipto(&conf, CC_NONWHITESPACE); 775214006Smarcel if (error == PE_EOL) { 776214006Smarcel parse_advance(&conf); 777214006Smarcel continue; 778214006Smarcel } 779214006Smarcel if (error < 0) 780214006Smarcel break; 781214006Smarcel switch (parse_peek(&conf)) { 782214006Smarcel case '#': 783214006Smarcel error = parse_skipto(&conf, '\n'); 784214006Smarcel break; 785214006Smarcel case '.': 786214006Smarcel error = parse_directive(&conf); 787214006Smarcel break; 788214006Smarcel default: 789214006Smarcel error = parse_mount(&conf); 790214006Smarcel break; 791214006Smarcel } 792214006Smarcel if (error < 0) 793214006Smarcel break; 794214006Smarcel /* Ignore any trailing garbage on the line. */ 795214006Smarcel if (parse_peek(&conf) != '\n') { 796214006Smarcel printf("mountroot: advancing to next directive...\n"); 797214006Smarcel (void)parse_skipto(&conf, '\n'); 798214006Smarcel } 799214006Smarcel mp = TAILQ_NEXT(mpdevfs, mnt_list); 800214006Smarcel } 801214006Smarcel if (mp != NULL) 802214006Smarcel return (0); 803214006Smarcel 804213365Smarcel /* 805214006Smarcel * We failed to mount (a new) root. 806213365Smarcel */ 807214006Smarcel switch (root_mount_onfail) { 808214006Smarcel case A_CONTINUE: 809214006Smarcel break; 810214006Smarcel case A_PANIC: 811214006Smarcel panic("mountroot: unable to (re-)mount root."); 812214006Smarcel /* NOTREACHED */ 813214006Smarcel case A_RETRY: 814214006Smarcel goto retry; 815214006Smarcel case A_REBOOT: 816214006Smarcel kern_reboot(RB_NOSYNC); 817214006Smarcel /* NOTREACHED */ 818213365Smarcel } 819213365Smarcel 820214006Smarcel return (error); 821214006Smarcel} 822214006Smarcel 823214006Smarcelstatic void 824214006Smarcelvfs_mountroot_conf0(struct sbuf *sb) 825214006Smarcel{ 826214006Smarcel char *s, *tok, *mnt, *opt; 827214006Smarcel int error; 828214006Smarcel 829214006Smarcel sbuf_printf(sb, ".onfail panic\n"); 830214006Smarcel sbuf_printf(sb, ".timeout %d\n", root_mount_timeout); 831214006Smarcel if (boothowto & RB_ASKNAME) 832214006Smarcel sbuf_printf(sb, ".ask\n"); 833214006Smarcel#ifdef ROOTDEVNAME 834214006Smarcel if (boothowto & RB_DFLTROOT) 835214006Smarcel sbuf_printf(sb, "%s\n", ROOTDEVNAME); 836214006Smarcel#endif 837213365Smarcel if (boothowto & RB_CDROM) { 838217163Snwhitehorn sbuf_printf(sb, "cd9660:/dev/cd0 ro\n"); 839214006Smarcel sbuf_printf(sb, ".timeout 0\n"); 840217163Snwhitehorn sbuf_printf(sb, "cd9660:/dev/acd0 ro\n"); 841214006Smarcel sbuf_printf(sb, ".timeout %d\n", root_mount_timeout); 842214006Smarcel } 843214006Smarcel s = getenv("vfs.root.mountfrom"); 844214006Smarcel if (s != NULL) { 845214006Smarcel opt = getenv("vfs.root.mountfrom.options"); 846214006Smarcel tok = s; 847214006Smarcel error = parse_token(&tok, &mnt); 848214006Smarcel while (!error) { 849214006Smarcel sbuf_printf(sb, "%s %s\n", mnt, 850214006Smarcel (opt != NULL) ? opt : ""); 851214006Smarcel free(mnt, M_TEMP); 852214006Smarcel error = parse_token(&tok, &mnt); 853213365Smarcel } 854214006Smarcel if (opt != NULL) 855214006Smarcel freeenv(opt); 856214006Smarcel freeenv(s); 857213365Smarcel } 858214006Smarcel if (rootdevnames[0] != NULL) 859214006Smarcel sbuf_printf(sb, "%s\n", rootdevnames[0]); 860214006Smarcel if (rootdevnames[1] != NULL) 861214006Smarcel sbuf_printf(sb, "%s\n", rootdevnames[1]); 862214006Smarcel#ifdef ROOTDEVNAME 863214006Smarcel if (!(boothowto & RB_DFLTROOT)) 864214006Smarcel sbuf_printf(sb, "%s\n", ROOTDEVNAME); 865214006Smarcel#endif 866214006Smarcel if (!(boothowto & RB_ASKNAME)) 867214006Smarcel sbuf_printf(sb, ".ask\n"); 868214006Smarcel} 869213365Smarcel 870214006Smarcelstatic int 871214006Smarcelvfs_mountroot_readconf(struct thread *td, struct sbuf *sb) 872214006Smarcel{ 873214006Smarcel static char buf[128]; 874214006Smarcel struct nameidata nd; 875214006Smarcel off_t ofs; 876231949Skib ssize_t resid; 877241896Skib int error, flags, len; 878214006Smarcel 879241896Skib NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/.mount.conf", td); 880214006Smarcel flags = FREAD; 881214006Smarcel error = vn_open(&nd, &flags, 0, NULL); 882214006Smarcel if (error) 883214006Smarcel return (error); 884214006Smarcel 885214006Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 886214006Smarcel ofs = 0; 887214006Smarcel len = sizeof(buf) - 1; 888214006Smarcel while (1) { 889214006Smarcel error = vn_rdwr(UIO_READ, nd.ni_vp, buf, len, ofs, 890214006Smarcel UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, 891214006Smarcel NOCRED, &resid, td); 892214006Smarcel if (error) 893214006Smarcel break; 894214006Smarcel if (resid == len) 895214006Smarcel break; 896214006Smarcel buf[len - resid] = 0; 897214006Smarcel sbuf_printf(sb, "%s", buf); 898214006Smarcel ofs += len - resid; 899214006Smarcel } 900214006Smarcel 901214006Smarcel VOP_UNLOCK(nd.ni_vp, 0); 902214006Smarcel vn_close(nd.ni_vp, FREAD, td->td_ucred, td); 903214006Smarcel return (error); 904214006Smarcel} 905214006Smarcel 906214006Smarcelstatic void 907214006Smarcelvfs_mountroot_wait(void) 908214006Smarcel{ 909214006Smarcel struct root_hold_token *h; 910214006Smarcel struct timeval lastfail; 911214006Smarcel int curfail; 912214006Smarcel 913214006Smarcel curfail = 0; 914214006Smarcel while (1) { 915214006Smarcel DROP_GIANT(); 916214006Smarcel g_waitidle(); 917214006Smarcel PICKUP_GIANT(); 918214006Smarcel mtx_lock(&mountlist_mtx); 919214006Smarcel if (LIST_EMPTY(&root_holds)) { 920214006Smarcel mtx_unlock(&mountlist_mtx); 921214006Smarcel break; 922214006Smarcel } 923214006Smarcel if (ppsratecheck(&lastfail, &curfail, 1)) { 924214006Smarcel printf("Root mount waiting for:"); 925214006Smarcel LIST_FOREACH(h, &root_holds, list) 926214006Smarcel printf(" %s", h->who); 927214006Smarcel printf("\n"); 928214006Smarcel } 929214006Smarcel msleep(&root_holds, &mountlist_mtx, PZERO | PDROP, "roothold", 930214006Smarcel hz); 931214006Smarcel } 932214006Smarcel} 933214006Smarcel 934214006Smarcelvoid 935214006Smarcelvfs_mountroot(void) 936214006Smarcel{ 937214006Smarcel struct mount *mp; 938214006Smarcel struct sbuf *sb; 939214006Smarcel struct thread *td; 940214006Smarcel time_t timebase; 941214006Smarcel int error; 942214006Smarcel 943214006Smarcel td = curthread; 944214006Smarcel 945214006Smarcel vfs_mountroot_wait(); 946214006Smarcel 947214006Smarcel sb = sbuf_new_auto(); 948214006Smarcel vfs_mountroot_conf0(sb); 949214006Smarcel sbuf_finish(sb); 950214006Smarcel 951214006Smarcel error = vfs_mountroot_devfs(td, &mp); 952214006Smarcel while (!error) { 953214006Smarcel error = vfs_mountroot_parse(sb, mp); 954214006Smarcel if (!error) { 955214006Smarcel error = vfs_mountroot_shuffle(td, mp); 956214006Smarcel if (!error) { 957214006Smarcel sbuf_clear(sb); 958214006Smarcel error = vfs_mountroot_readconf(td, sb); 959214006Smarcel sbuf_finish(sb); 960213365Smarcel } 961213365Smarcel } 962213365Smarcel } 963213365Smarcel 964214006Smarcel sbuf_delete(sb); 965213365Smarcel 966213365Smarcel /* 967214006Smarcel * Iterate over all currently mounted file systems and use 968214006Smarcel * the time stamp found to check and/or initialize the RTC. 969214006Smarcel * Call inittodr() only once and pass it the largest of the 970214006Smarcel * timestamps we encounter. 971213365Smarcel */ 972214006Smarcel timebase = 0; 973214006Smarcel mtx_lock(&mountlist_mtx); 974214006Smarcel mp = TAILQ_FIRST(&mountlist); 975214006Smarcel while (mp != NULL) { 976214006Smarcel if (mp->mnt_time > timebase) 977214006Smarcel timebase = mp->mnt_time; 978214006Smarcel mp = TAILQ_NEXT(mp, mnt_list); 979214006Smarcel } 980214006Smarcel mtx_unlock(&mountlist_mtx); 981214006Smarcel inittodr(timebase); 982213365Smarcel 983214006Smarcel /* Keep prison0's root in sync with the global rootvnode. */ 984214006Smarcel mtx_lock(&prison0.pr_mtx); 985214006Smarcel prison0.pr_root = rootvnode; 986214006Smarcel vref(prison0.pr_root); 987214006Smarcel mtx_unlock(&prison0.pr_mtx); 988213365Smarcel 989214006Smarcel mtx_lock(&mountlist_mtx); 990214006Smarcel atomic_store_rel_int(&root_mount_complete, 1); 991214006Smarcel wakeup(&root_mount_complete); 992214006Smarcel mtx_unlock(&mountlist_mtx); 993248645Savg 994248645Savg EVENTHANDLER_INVOKE(mountroot); 995213365Smarcel} 996213365Smarcel 997213365Smarcelstatic struct mntarg * 998213365Smarcelparse_mountroot_options(struct mntarg *ma, const char *options) 999213365Smarcel{ 1000213365Smarcel char *p; 1001213365Smarcel char *name, *name_arg; 1002213365Smarcel char *val, *val_arg; 1003213365Smarcel char *opts; 1004213365Smarcel 1005213365Smarcel if (options == NULL || options[0] == '\0') 1006213365Smarcel return (ma); 1007213365Smarcel 1008213365Smarcel p = opts = strdup(options, M_MOUNT); 1009213365Smarcel if (opts == NULL) { 1010213365Smarcel return (ma); 1011214006Smarcel } 1012213365Smarcel 1013213365Smarcel while((name = strsep(&p, ",")) != NULL) { 1014213365Smarcel if (name[0] == '\0') 1015213365Smarcel break; 1016213365Smarcel 1017213365Smarcel val = strchr(name, '='); 1018213365Smarcel if (val != NULL) { 1019213365Smarcel *val = '\0'; 1020213365Smarcel ++val; 1021213365Smarcel } 1022213365Smarcel if( strcmp(name, "rw") == 0 || 1023213365Smarcel strcmp(name, "noro") == 0) { 1024213365Smarcel /* 1025213365Smarcel * The first time we mount the root file system, 1026213365Smarcel * we need to mount 'ro', so We need to ignore 1027213365Smarcel * 'rw' and 'noro' mount options. 1028213365Smarcel */ 1029213365Smarcel continue; 1030213365Smarcel } 1031213365Smarcel name_arg = strdup(name, M_MOUNT); 1032213365Smarcel val_arg = NULL; 1033214006Smarcel if (val != NULL) 1034213365Smarcel val_arg = strdup(val, M_MOUNT); 1035213365Smarcel 1036213365Smarcel ma = mount_arg(ma, name_arg, val_arg, 1037213365Smarcel (val_arg != NULL ? -1 : 0)); 1038213365Smarcel } 1039213365Smarcel free(opts, M_MOUNT); 1040213365Smarcel return (ma); 1041213365Smarcel} 1042