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: releng/11.0/sys/kern/vfs_mountroot.c 299523 2016-05-12 07:38:10Z trasz $"); 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 82298819Spfg * from the first one that succeeds. 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 *); 91290197Straszstatic int sysctl_vfs_root_mount_hold(SYSCTL_HANDLER_ARGS); 92297190Straszstatic void vfs_mountroot_wait(void); 93290196Straszstatic int vfs_mountroot_wait_if_neccessary(const char *fs, const char *dev); 94214006Smarcel 95213365Smarcel/* 96214006Smarcel * The vnode of the system's root (/ in the filesystem, without chroot 97214006Smarcel * active.) 98213365Smarcel */ 99214006Smarcelstruct vnode *rootvnode; 100213365Smarcel 101287107Strasz/* 102287107Strasz * Mount of the system's /dev. 103287107Strasz */ 104287107Straszstruct mount *rootdevmp; 105287107Strasz 106214006Smarcelchar *rootdevnames[2] = {NULL, NULL}; 107213365Smarcel 108267351Smavstruct mtx root_holds_mtx; 109267351SmavMTX_SYSINIT(root_holds, &root_holds_mtx, "root_holds", MTX_DEF); 110267351Smav 111213365Smarcelstruct root_hold_token { 112213365Smarcel const char *who; 113213365Smarcel LIST_ENTRY(root_hold_token) list; 114213365Smarcel}; 115213365Smarcel 116213365Smarcelstatic LIST_HEAD(, root_hold_token) root_holds = 117213365Smarcel LIST_HEAD_INITIALIZER(root_holds); 118213365Smarcel 119214006Smarcelenum action { 120214006Smarcel A_CONTINUE, 121214006Smarcel A_PANIC, 122214006Smarcel A_REBOOT, 123214006Smarcel A_RETRY 124214006Smarcel}; 125214006Smarcel 126214006Smarcelstatic enum action root_mount_onfail = A_CONTINUE; 127214006Smarcel 128214006Smarcelstatic int root_mount_mddev; 129213365Smarcelstatic int root_mount_complete; 130213365Smarcel 131214006Smarcel/* By default wait up to 3 seconds for devices to appear. */ 132214006Smarcelstatic int root_mount_timeout = 3; 133253910SmarcelTUNABLE_INT("vfs.mountroot.timeout", &root_mount_timeout); 134214006Smarcel 135290197StraszSYSCTL_PROC(_vfs, OID_AUTO, root_mount_hold, 136290197Strasz CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, 137290197Strasz NULL, 0, sysctl_vfs_root_mount_hold, "A", 138290197Strasz "List of root mount hold tokens"); 139290197Strasz 140290197Straszstatic int 141290197Straszsysctl_vfs_root_mount_hold(SYSCTL_HANDLER_ARGS) 142290197Strasz{ 143290197Strasz struct sbuf sb; 144290197Strasz struct root_hold_token *h; 145290197Strasz int error; 146290197Strasz 147290197Strasz sbuf_new(&sb, NULL, 256, SBUF_AUTOEXTEND | SBUF_INCLUDENUL); 148290197Strasz 149290197Strasz mtx_lock(&root_holds_mtx); 150290197Strasz LIST_FOREACH(h, &root_holds, list) { 151290197Strasz if (h != LIST_FIRST(&root_holds)) 152290197Strasz sbuf_putc(&sb, ' '); 153290197Strasz sbuf_printf(&sb, "%s", h->who); 154290197Strasz } 155290197Strasz mtx_unlock(&root_holds_mtx); 156290197Strasz 157290197Strasz error = sbuf_finish(&sb); 158290197Strasz if (error == 0) 159290197Strasz error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 160290197Strasz sbuf_delete(&sb); 161290197Strasz return (error); 162290197Strasz} 163290197Strasz 164213365Smarcelstruct root_hold_token * 165213365Smarcelroot_mount_hold(const char *identifier) 166213365Smarcel{ 167213365Smarcel struct root_hold_token *h; 168213365Smarcel 169213365Smarcel if (root_mounted()) 170213365Smarcel return (NULL); 171213365Smarcel 172213365Smarcel h = malloc(sizeof *h, M_DEVBUF, M_ZERO | M_WAITOK); 173213365Smarcel h->who = identifier; 174267351Smav mtx_lock(&root_holds_mtx); 175213365Smarcel LIST_INSERT_HEAD(&root_holds, h, list); 176267351Smav mtx_unlock(&root_holds_mtx); 177213365Smarcel return (h); 178213365Smarcel} 179213365Smarcel 180213365Smarcelvoid 181213365Smarcelroot_mount_rel(struct root_hold_token *h) 182213365Smarcel{ 183213365Smarcel 184213365Smarcel if (h == NULL) 185213365Smarcel return; 186267351Smav mtx_lock(&root_holds_mtx); 187213365Smarcel LIST_REMOVE(h, list); 188213365Smarcel wakeup(&root_holds); 189267351Smav mtx_unlock(&root_holds_mtx); 190213365Smarcel free(h, M_DEVBUF); 191213365Smarcel} 192213365Smarcel 193213365Smarcelint 194213365Smarcelroot_mounted(void) 195213365Smarcel{ 196213365Smarcel 197213365Smarcel /* No mutex is acquired here because int stores are atomic. */ 198213365Smarcel return (root_mount_complete); 199213365Smarcel} 200213365Smarcel 201213365Smarcelstatic void 202213365Smarcelset_rootvnode(void) 203213365Smarcel{ 204213365Smarcel struct proc *p; 205213365Smarcel 206213365Smarcel if (VFS_ROOT(TAILQ_FIRST(&mountlist), LK_EXCLUSIVE, &rootvnode)) 207213365Smarcel panic("Cannot find root vnode"); 208213365Smarcel 209213365Smarcel VOP_UNLOCK(rootvnode, 0); 210213365Smarcel 211213365Smarcel p = curthread->td_proc; 212213365Smarcel FILEDESC_XLOCK(p->p_fd); 213213365Smarcel 214213365Smarcel if (p->p_fd->fd_cdir != NULL) 215213365Smarcel vrele(p->p_fd->fd_cdir); 216213365Smarcel p->p_fd->fd_cdir = rootvnode; 217213365Smarcel VREF(rootvnode); 218213365Smarcel 219213365Smarcel if (p->p_fd->fd_rdir != NULL) 220213365Smarcel vrele(p->p_fd->fd_rdir); 221213365Smarcel p->p_fd->fd_rdir = rootvnode; 222213365Smarcel VREF(rootvnode); 223213365Smarcel 224213365Smarcel FILEDESC_XUNLOCK(p->p_fd); 225213365Smarcel} 226213365Smarcel 227214006Smarcelstatic int 228214006Smarcelvfs_mountroot_devfs(struct thread *td, struct mount **mpp) 229213365Smarcel{ 230213365Smarcel struct vfsoptlist *opts; 231213365Smarcel struct vfsconf *vfsp; 232214006Smarcel struct mount *mp; 233213365Smarcel int error; 234213365Smarcel 235214006Smarcel *mpp = NULL; 236214006Smarcel 237287964Strasz if (rootdevmp != NULL) { 238287964Strasz /* 239287964Strasz * Already have /dev; this happens during rerooting. 240287964Strasz */ 241287964Strasz error = vfs_busy(rootdevmp, 0); 242287964Strasz if (error != 0) 243287964Strasz return (error); 244287964Strasz *mpp = rootdevmp; 245287964Strasz } else { 246287964Strasz vfsp = vfs_byname("devfs"); 247287964Strasz KASSERT(vfsp != NULL, ("Could not find devfs by name")); 248287964Strasz if (vfsp == NULL) 249287964Strasz return (ENOENT); 250213365Smarcel 251287964Strasz mp = vfs_mount_alloc(NULLVP, vfsp, "/dev", td->td_ucred); 252213365Smarcel 253287964Strasz error = VFS_MOUNT(mp); 254287964Strasz KASSERT(error == 0, ("VFS_MOUNT(devfs) failed %d", error)); 255287964Strasz if (error) 256287964Strasz return (error); 257213365Smarcel 258287964Strasz opts = malloc(sizeof(struct vfsoptlist), M_MOUNT, M_WAITOK); 259287964Strasz TAILQ_INIT(opts); 260287964Strasz mp->mnt_opt = opts; 261213365Smarcel 262287964Strasz mtx_lock(&mountlist_mtx); 263287964Strasz TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list); 264287964Strasz mtx_unlock(&mountlist_mtx); 265213365Smarcel 266287964Strasz *mpp = mp; 267287964Strasz rootdevmp = mp; 268287964Strasz } 269287964Strasz 270213365Smarcel set_rootvnode(); 271213365Smarcel 272274476Skib error = kern_symlinkat(td, "/", AT_FDCWD, "dev", UIO_SYSSPACE); 273213365Smarcel if (error) 274213365Smarcel printf("kern_symlink /dev -> / returns %d\n", error); 275214006Smarcel 276214006Smarcel return (error); 277213365Smarcel} 278213365Smarcel 279288091Sbdrewerystatic void 280214006Smarcelvfs_mountroot_shuffle(struct thread *td, struct mount *mpdevfs) 281213365Smarcel{ 282213365Smarcel struct nameidata nd; 283214006Smarcel struct mount *mporoot, *mpnroot; 284214006Smarcel struct vnode *vp, *vporoot, *vpdevfs; 285214006Smarcel char *fspath; 286213365Smarcel int error; 287213365Smarcel 288214006Smarcel mpnroot = TAILQ_NEXT(mpdevfs, mnt_list); 289214006Smarcel 290214006Smarcel /* Shuffle the mountlist. */ 291213365Smarcel mtx_lock(&mountlist_mtx); 292214006Smarcel mporoot = TAILQ_FIRST(&mountlist); 293214006Smarcel TAILQ_REMOVE(&mountlist, mpdevfs, mnt_list); 294214006Smarcel if (mporoot != mpdevfs) { 295214006Smarcel TAILQ_REMOVE(&mountlist, mpnroot, mnt_list); 296214006Smarcel TAILQ_INSERT_HEAD(&mountlist, mpnroot, mnt_list); 297214006Smarcel } 298214006Smarcel TAILQ_INSERT_TAIL(&mountlist, mpdevfs, mnt_list); 299213365Smarcel mtx_unlock(&mountlist_mtx); 300213365Smarcel 301214006Smarcel cache_purgevfs(mporoot); 302214006Smarcel if (mporoot != mpdevfs) 303214006Smarcel cache_purgevfs(mpdevfs); 304213365Smarcel 305214006Smarcel VFS_ROOT(mporoot, LK_EXCLUSIVE, &vporoot); 306214006Smarcel 307214006Smarcel VI_LOCK(vporoot); 308214006Smarcel vporoot->v_iflag &= ~VI_MOUNT; 309214006Smarcel VI_UNLOCK(vporoot); 310214006Smarcel vporoot->v_mountedhere = NULL; 311214006Smarcel mporoot->mnt_flag &= ~MNT_ROOTFS; 312214006Smarcel mporoot->mnt_vnodecovered = NULL; 313214006Smarcel vput(vporoot); 314214006Smarcel 315214006Smarcel /* Set up the new rootvnode, and purge the cache */ 316214006Smarcel mpnroot->mnt_vnodecovered = NULL; 317213365Smarcel set_rootvnode(); 318213365Smarcel cache_purgevfs(rootvnode->v_mount); 319213365Smarcel 320214006Smarcel if (mporoot != mpdevfs) { 321214006Smarcel /* Remount old root under /.mount or /mnt */ 322214006Smarcel fspath = "/.mount"; 323214006Smarcel NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, 324214006Smarcel fspath, td); 325214006Smarcel error = namei(&nd); 326214006Smarcel if (error) { 327214006Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 328214006Smarcel fspath = "/mnt"; 329214006Smarcel NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, 330214006Smarcel fspath, td); 331214006Smarcel error = namei(&nd); 332214006Smarcel } 333214006Smarcel if (!error) { 334214006Smarcel vp = nd.ni_vp; 335214006Smarcel error = (vp->v_type == VDIR) ? 0 : ENOTDIR; 336214006Smarcel if (!error) 337214006Smarcel error = vinvalbuf(vp, V_SAVE, 0, 0); 338214006Smarcel if (!error) { 339214006Smarcel cache_purge(vp); 340214006Smarcel mporoot->mnt_vnodecovered = vp; 341214006Smarcel vp->v_mountedhere = mporoot; 342214006Smarcel strlcpy(mporoot->mnt_stat.f_mntonname, 343214006Smarcel fspath, MNAMELEN); 344214006Smarcel VOP_UNLOCK(vp, 0); 345214006Smarcel } else 346214006Smarcel vput(vp); 347214006Smarcel } 348214006Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 349214006Smarcel 350299523Strasz if (error) 351214006Smarcel printf("mountroot: unable to remount previous root " 352299523Strasz "under /.mount or /mnt (error %d)\n", error); 353214006Smarcel } 354214006Smarcel 355214006Smarcel /* Remount devfs under /dev */ 356213365Smarcel NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, "/dev", td); 357213365Smarcel error = namei(&nd); 358214006Smarcel if (!error) { 359214006Smarcel vp = nd.ni_vp; 360214006Smarcel error = (vp->v_type == VDIR) ? 0 : ENOTDIR; 361214006Smarcel if (!error) 362214006Smarcel error = vinvalbuf(vp, V_SAVE, 0, 0); 363214006Smarcel if (!error) { 364214006Smarcel vpdevfs = mpdevfs->mnt_vnodecovered; 365214006Smarcel if (vpdevfs != NULL) { 366214006Smarcel cache_purge(vpdevfs); 367214006Smarcel vpdevfs->v_mountedhere = NULL; 368214006Smarcel vrele(vpdevfs); 369214006Smarcel } 370214006Smarcel mpdevfs->mnt_vnodecovered = vp; 371214006Smarcel vp->v_mountedhere = mpdevfs; 372214006Smarcel VOP_UNLOCK(vp, 0); 373214006Smarcel } else 374214006Smarcel vput(vp); 375213365Smarcel } 376299523Strasz if (error) 377214006Smarcel printf("mountroot: unable to remount devfs under /dev " 378299523Strasz "(error %d)\n", error); 379213365Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 380214006Smarcel 381214006Smarcel if (mporoot == mpdevfs) { 382214006Smarcel vfs_unbusy(mpdevfs); 383214006Smarcel /* Unlink the no longer needed /dev/dev -> / symlink */ 384274476Skib error = kern_unlinkat(td, AT_FDCWD, "/dev/dev", 385274476Skib UIO_SYSSPACE, 0); 386299523Strasz if (error) 387214006Smarcel printf("mountroot: unable to unlink /dev/dev " 388214006Smarcel "(error %d)\n", error); 389213365Smarcel } 390214006Smarcel} 391214006Smarcel 392214006Smarcel/* 393214006Smarcel * Configuration parser. 394214006Smarcel */ 395214006Smarcel 396214006Smarcel/* Parser character classes. */ 397214006Smarcel#define CC_WHITESPACE -1 398214006Smarcel#define CC_NONWHITESPACE -2 399214006Smarcel 400214006Smarcel/* Parse errors. */ 401214006Smarcel#define PE_EOF -1 402214006Smarcel#define PE_EOL -2 403214006Smarcel 404214006Smarcelstatic __inline int 405214006Smarcelparse_peek(char **conf) 406214006Smarcel{ 407214006Smarcel 408214006Smarcel return (**conf); 409214006Smarcel} 410214006Smarcel 411214006Smarcelstatic __inline void 412214006Smarcelparse_poke(char **conf, int c) 413214006Smarcel{ 414214006Smarcel 415214006Smarcel **conf = c; 416214006Smarcel} 417214006Smarcel 418214006Smarcelstatic __inline void 419214006Smarcelparse_advance(char **conf) 420214006Smarcel{ 421214006Smarcel 422214006Smarcel (*conf)++; 423214006Smarcel} 424214006Smarcel 425214006Smarcelstatic int 426214006Smarcelparse_skipto(char **conf, int mc) 427214006Smarcel{ 428214006Smarcel int c, match; 429214006Smarcel 430214006Smarcel while (1) { 431214006Smarcel c = parse_peek(conf); 432214006Smarcel if (c == 0) 433214006Smarcel return (PE_EOF); 434214006Smarcel switch (mc) { 435214006Smarcel case CC_WHITESPACE: 436214006Smarcel match = (c == ' ' || c == '\t' || c == '\n') ? 1 : 0; 437214006Smarcel break; 438214006Smarcel case CC_NONWHITESPACE: 439214006Smarcel if (c == '\n') 440214006Smarcel return (PE_EOL); 441214006Smarcel match = (c != ' ' && c != '\t') ? 1 : 0; 442214006Smarcel break; 443214006Smarcel default: 444214006Smarcel match = (c == mc) ? 1 : 0; 445214006Smarcel break; 446214006Smarcel } 447214006Smarcel if (match) 448214006Smarcel break; 449214006Smarcel parse_advance(conf); 450213365Smarcel } 451214006Smarcel return (0); 452214006Smarcel} 453213365Smarcel 454214006Smarcelstatic int 455214006Smarcelparse_token(char **conf, char **tok) 456214006Smarcel{ 457214006Smarcel char *p; 458214006Smarcel size_t len; 459214006Smarcel int error; 460214006Smarcel 461214006Smarcel *tok = NULL; 462214006Smarcel error = parse_skipto(conf, CC_NONWHITESPACE); 463213365Smarcel if (error) 464214006Smarcel return (error); 465214006Smarcel p = *conf; 466214006Smarcel error = parse_skipto(conf, CC_WHITESPACE); 467214006Smarcel len = *conf - p; 468214006Smarcel *tok = malloc(len + 1, M_TEMP, M_WAITOK | M_ZERO); 469214006Smarcel bcopy(p, *tok, len); 470214006Smarcel return (0); 471213365Smarcel} 472213365Smarcel 473214006Smarcelstatic void 474214006Smarcelparse_dir_ask_printenv(const char *var) 475213365Smarcel{ 476214006Smarcel char *val; 477213365Smarcel 478273174Sdavide val = kern_getenv(var); 479214006Smarcel if (val != NULL) { 480214006Smarcel printf(" %s=%s\n", var, val); 481214006Smarcel freeenv(val); 482214006Smarcel } 483214006Smarcel} 484213365Smarcel 485214006Smarcelstatic int 486214006Smarcelparse_dir_ask(char **conf) 487214006Smarcel{ 488214006Smarcel char name[80]; 489214006Smarcel char *mnt; 490214006Smarcel int error; 491213365Smarcel 492297190Strasz vfs_mountroot_wait(); 493297190Strasz 494214006Smarcel printf("\nLoader variables:\n"); 495214006Smarcel parse_dir_ask_printenv("vfs.root.mountfrom"); 496214006Smarcel parse_dir_ask_printenv("vfs.root.mountfrom.options"); 497213365Smarcel 498214006Smarcel printf("\nManual root filesystem specification:\n"); 499214006Smarcel printf(" <fstype>:<device> [options]\n"); 500214006Smarcel printf(" Mount <device> using filesystem <fstype>\n"); 501214006Smarcel printf(" and with the specified (optional) option list.\n"); 502214006Smarcel printf("\n"); 503214006Smarcel printf(" eg. ufs:/dev/da0s1a\n"); 504214006Smarcel printf(" zfs:tank\n"); 505289449Sngie printf(" cd9660:/dev/cd0 ro\n"); 506214006Smarcel printf(" (which is equivalent to: "); 507289449Sngie printf("mount -t cd9660 -o ro /dev/cd0 /)\n"); 508214006Smarcel printf("\n"); 509214006Smarcel printf(" ? List valid disk boot devices\n"); 510214006Smarcel printf(" . Yield 1 second (for background tasks)\n"); 511214006Smarcel printf(" <empty line> Abort manual input\n"); 512214006Smarcel 513226673Smarcel do { 514226673Smarcel error = EINVAL; 515226673Smarcel printf("\nmountroot> "); 516228634Savg cngets(name, sizeof(name), GETS_ECHO); 517226673Smarcel if (name[0] == '\0') 518226673Smarcel break; 519226673Smarcel if (name[0] == '?' && name[1] == '\0') { 520226673Smarcel printf("\nList of GEOM managed disk devices:\n "); 521226673Smarcel g_dev_print(); 522226673Smarcel continue; 523226673Smarcel } 524226673Smarcel if (name[0] == '.' && name[1] == '\0') { 525226673Smarcel pause("rmask", hz); 526226673Smarcel continue; 527226673Smarcel } 528226673Smarcel mnt = name; 529226673Smarcel error = parse_mount(&mnt); 530226673Smarcel if (error == -1) 531226673Smarcel printf("Invalid file system specification.\n"); 532226673Smarcel } while (error != 0); 533226673Smarcel 534214006Smarcel return (error); 535214006Smarcel} 536213365Smarcel 537214006Smarcelstatic int 538214006Smarcelparse_dir_md(char **conf) 539214006Smarcel{ 540214006Smarcel struct stat sb; 541214006Smarcel struct thread *td; 542214006Smarcel struct md_ioctl *mdio; 543214006Smarcel char *path, *tok; 544214006Smarcel int error, fd, len; 545213365Smarcel 546214006Smarcel td = curthread; 547214006Smarcel 548214006Smarcel error = parse_token(conf, &tok); 549214006Smarcel if (error) 550214006Smarcel return (error); 551214006Smarcel 552214006Smarcel len = strlen(tok); 553214006Smarcel mdio = malloc(sizeof(*mdio) + len + 1, M_TEMP, M_WAITOK | M_ZERO); 554214006Smarcel path = (void *)(mdio + 1); 555214006Smarcel bcopy(tok, path, len); 556214006Smarcel free(tok, M_TEMP); 557214006Smarcel 558214006Smarcel /* Get file status. */ 559274476Skib error = kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &sb, NULL); 560214006Smarcel if (error) 561214006Smarcel goto out; 562214006Smarcel 563214006Smarcel /* Open /dev/mdctl so that we can attach/detach. */ 564274476Skib error = kern_openat(td, AT_FDCWD, "/dev/" MDCTL_NAME, UIO_SYSSPACE, 565274476Skib O_RDWR, 0); 566214006Smarcel if (error) 567214006Smarcel goto out; 568214006Smarcel 569214006Smarcel fd = td->td_retval[0]; 570214006Smarcel mdio->md_version = MDIOVERSION; 571214006Smarcel mdio->md_type = MD_VNODE; 572214006Smarcel 573214006Smarcel if (root_mount_mddev != -1) { 574214006Smarcel mdio->md_unit = root_mount_mddev; 575214006Smarcel DROP_GIANT(); 576214006Smarcel error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio); 577214006Smarcel PICKUP_GIANT(); 578214006Smarcel /* Ignore errors. We don't care. */ 579214006Smarcel root_mount_mddev = -1; 580214006Smarcel } 581214006Smarcel 582214006Smarcel mdio->md_file = (void *)(mdio + 1); 583214006Smarcel mdio->md_options = MD_AUTOUNIT | MD_READONLY; 584214006Smarcel mdio->md_mediasize = sb.st_size; 585214006Smarcel mdio->md_unit = 0; 586214006Smarcel DROP_GIANT(); 587214006Smarcel error = kern_ioctl(td, fd, MDIOCATTACH, (void *)mdio); 588214006Smarcel PICKUP_GIANT(); 589214006Smarcel if (error) 590214006Smarcel goto out; 591214006Smarcel 592214006Smarcel if (mdio->md_unit > 9) { 593214006Smarcel printf("rootmount: too many md units\n"); 594214006Smarcel mdio->md_file = NULL; 595214006Smarcel mdio->md_options = 0; 596214006Smarcel mdio->md_mediasize = 0; 597214006Smarcel DROP_GIANT(); 598214006Smarcel error = kern_ioctl(td, fd, MDIOCDETACH, (void *)mdio); 599214006Smarcel PICKUP_GIANT(); 600214006Smarcel /* Ignore errors. We don't care. */ 601214006Smarcel error = ERANGE; 602214006Smarcel goto out; 603214006Smarcel } 604214006Smarcel 605214006Smarcel root_mount_mddev = mdio->md_unit; 606214006Smarcel printf(MD_NAME "%u attached to %s\n", root_mount_mddev, mdio->md_file); 607214006Smarcel 608214006Smarcel error = kern_close(td, fd); 609214006Smarcel 610214006Smarcel out: 611214006Smarcel free(mdio, M_TEMP); 612214006Smarcel return (error); 613214006Smarcel} 614214006Smarcel 615214006Smarcelstatic int 616214006Smarcelparse_dir_onfail(char **conf) 617214006Smarcel{ 618214006Smarcel char *action; 619214006Smarcel int error; 620214006Smarcel 621214006Smarcel error = parse_token(conf, &action); 622214006Smarcel if (error) 623214006Smarcel return (error); 624214006Smarcel 625214006Smarcel if (!strcmp(action, "continue")) 626214006Smarcel root_mount_onfail = A_CONTINUE; 627214006Smarcel else if (!strcmp(action, "panic")) 628214006Smarcel root_mount_onfail = A_PANIC; 629214006Smarcel else if (!strcmp(action, "reboot")) 630214006Smarcel root_mount_onfail = A_REBOOT; 631214006Smarcel else if (!strcmp(action, "retry")) 632214006Smarcel root_mount_onfail = A_RETRY; 633214006Smarcel else { 634214006Smarcel printf("rootmount: %s: unknown action\n", action); 635214006Smarcel error = EINVAL; 636214006Smarcel } 637214006Smarcel 638214006Smarcel free(action, M_TEMP); 639214006Smarcel return (0); 640214006Smarcel} 641214006Smarcel 642214006Smarcelstatic int 643214006Smarcelparse_dir_timeout(char **conf) 644214006Smarcel{ 645214006Smarcel char *tok, *endtok; 646214006Smarcel long secs; 647214006Smarcel int error; 648214006Smarcel 649214006Smarcel error = parse_token(conf, &tok); 650214006Smarcel if (error) 651214006Smarcel return (error); 652214006Smarcel 653214006Smarcel secs = strtol(tok, &endtok, 0); 654214006Smarcel error = (secs < 0 || *endtok != '\0') ? EINVAL : 0; 655214006Smarcel if (!error) 656214006Smarcel root_mount_timeout = secs; 657214006Smarcel free(tok, M_TEMP); 658214006Smarcel return (error); 659214006Smarcel} 660214006Smarcel 661214006Smarcelstatic int 662214006Smarcelparse_directive(char **conf) 663214006Smarcel{ 664214006Smarcel char *dir; 665214006Smarcel int error; 666214006Smarcel 667214006Smarcel error = parse_token(conf, &dir); 668214006Smarcel if (error) 669214006Smarcel return (error); 670214006Smarcel 671214006Smarcel if (strcmp(dir, ".ask") == 0) 672214006Smarcel error = parse_dir_ask(conf); 673214006Smarcel else if (strcmp(dir, ".md") == 0) 674214006Smarcel error = parse_dir_md(conf); 675214006Smarcel else if (strcmp(dir, ".onfail") == 0) 676214006Smarcel error = parse_dir_onfail(conf); 677214006Smarcel else if (strcmp(dir, ".timeout") == 0) 678214006Smarcel error = parse_dir_timeout(conf); 679214006Smarcel else { 680214006Smarcel printf("mountroot: invalid directive `%s'\n", dir); 681214006Smarcel /* Ignore the rest of the line. */ 682214006Smarcel (void)parse_skipto(conf, '\n'); 683214006Smarcel error = EINVAL; 684214006Smarcel } 685214006Smarcel free(dir, M_TEMP); 686214006Smarcel return (error); 687214006Smarcel} 688214006Smarcel 689214006Smarcelstatic int 690214006Smarcelparse_mount_dev_present(const char *dev) 691214006Smarcel{ 692214006Smarcel struct nameidata nd; 693214006Smarcel int error; 694214006Smarcel 695214006Smarcel NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, dev, curthread); 696214006Smarcel error = namei(&nd); 697214006Smarcel if (!error) 698214006Smarcel vput(nd.ni_vp); 699214006Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 700214006Smarcel return (error != 0) ? 0 : 1; 701214006Smarcel} 702214006Smarcel 703243868Skib#define ERRMSGL 255 704214006Smarcelstatic int 705214006Smarcelparse_mount(char **conf) 706214006Smarcel{ 707243868Skib char *errmsg; 708214006Smarcel struct mntarg *ma; 709214006Smarcel char *dev, *fs, *opts, *tok; 710290196Strasz int error; 711214006Smarcel 712214006Smarcel error = parse_token(conf, &tok); 713214006Smarcel if (error) 714214006Smarcel return (error); 715214006Smarcel fs = tok; 716214006Smarcel error = parse_skipto(&tok, ':'); 717214006Smarcel if (error) { 718214006Smarcel free(fs, M_TEMP); 719214006Smarcel return (error); 720214006Smarcel } 721214006Smarcel parse_poke(&tok, '\0'); 722214006Smarcel parse_advance(&tok); 723214006Smarcel dev = tok; 724214006Smarcel 725214006Smarcel if (root_mount_mddev != -1) { 726214006Smarcel /* Handle substitution for the md unit number. */ 727214006Smarcel tok = strstr(dev, "md#"); 728214006Smarcel if (tok != NULL) 729214006Smarcel tok[2] = '0' + root_mount_mddev; 730214006Smarcel } 731214006Smarcel 732214006Smarcel /* Parse options. */ 733214006Smarcel error = parse_token(conf, &tok); 734214006Smarcel opts = (error == 0) ? tok : NULL; 735214006Smarcel 736214006Smarcel printf("Trying to mount root from %s:%s [%s]...\n", fs, dev, 737214006Smarcel (opts != NULL) ? opts : ""); 738214006Smarcel 739243868Skib errmsg = malloc(ERRMSGL, M_TEMP, M_WAITOK | M_ZERO); 740214006Smarcel 741214006Smarcel if (vfs_byname(fs) == NULL) { 742255412Sdelphij strlcpy(errmsg, "unknown file system", ERRMSGL); 743214006Smarcel error = ENOENT; 744214006Smarcel goto out; 745214006Smarcel } 746214006Smarcel 747290196Strasz error = vfs_mountroot_wait_if_neccessary(fs, dev); 748290196Strasz if (error != 0) 749290196Strasz goto out; 750214006Smarcel 751214006Smarcel ma = NULL; 752214006Smarcel ma = mount_arg(ma, "fstype", fs, -1); 753214006Smarcel ma = mount_arg(ma, "fspath", "/", -1); 754214006Smarcel ma = mount_arg(ma, "from", dev, -1); 755243868Skib ma = mount_arg(ma, "errmsg", errmsg, ERRMSGL); 756214006Smarcel ma = mount_arg(ma, "ro", NULL, 0); 757214006Smarcel ma = parse_mountroot_options(ma, opts); 758214006Smarcel error = kernel_mount(ma, MNT_ROOTFS); 759214006Smarcel 760214006Smarcel out: 761214006Smarcel if (error) { 762214006Smarcel printf("Mounting from %s:%s failed with error %d", 763214006Smarcel fs, dev, error); 764214006Smarcel if (errmsg[0] != '\0') 765214006Smarcel printf(": %s", errmsg); 766214006Smarcel printf(".\n"); 767214006Smarcel } 768214006Smarcel free(fs, M_TEMP); 769243868Skib free(errmsg, M_TEMP); 770214006Smarcel if (opts != NULL) 771214006Smarcel free(opts, M_TEMP); 772214006Smarcel /* kernel_mount can return -1 on error. */ 773214006Smarcel return ((error < 0) ? EDOOFUS : error); 774214006Smarcel} 775243868Skib#undef ERRMSGL 776214006Smarcel 777214006Smarcelstatic int 778214006Smarcelvfs_mountroot_parse(struct sbuf *sb, struct mount *mpdevfs) 779214006Smarcel{ 780214006Smarcel struct mount *mp; 781214006Smarcel char *conf; 782214006Smarcel int error; 783214006Smarcel 784214006Smarcel root_mount_mddev = -1; 785214006Smarcel 786214006Smarcelretry: 787214006Smarcel conf = sbuf_data(sb); 788214006Smarcel mp = TAILQ_NEXT(mpdevfs, mnt_list); 789214006Smarcel error = (mp == NULL) ? 0 : EDOOFUS; 790214006Smarcel root_mount_onfail = A_CONTINUE; 791214006Smarcel while (mp == NULL) { 792214006Smarcel error = parse_skipto(&conf, CC_NONWHITESPACE); 793214006Smarcel if (error == PE_EOL) { 794214006Smarcel parse_advance(&conf); 795214006Smarcel continue; 796214006Smarcel } 797214006Smarcel if (error < 0) 798214006Smarcel break; 799214006Smarcel switch (parse_peek(&conf)) { 800214006Smarcel case '#': 801214006Smarcel error = parse_skipto(&conf, '\n'); 802214006Smarcel break; 803214006Smarcel case '.': 804214006Smarcel error = parse_directive(&conf); 805214006Smarcel break; 806214006Smarcel default: 807214006Smarcel error = parse_mount(&conf); 808287190Smarcel if (error == -1) { 809287190Smarcel printf("mountroot: invalid file system " 810287190Smarcel "specification.\n"); 811287190Smarcel error = 0; 812287190Smarcel } 813214006Smarcel break; 814214006Smarcel } 815214006Smarcel if (error < 0) 816214006Smarcel break; 817214006Smarcel /* Ignore any trailing garbage on the line. */ 818214006Smarcel if (parse_peek(&conf) != '\n') { 819214006Smarcel printf("mountroot: advancing to next directive...\n"); 820214006Smarcel (void)parse_skipto(&conf, '\n'); 821214006Smarcel } 822214006Smarcel mp = TAILQ_NEXT(mpdevfs, mnt_list); 823214006Smarcel } 824214006Smarcel if (mp != NULL) 825214006Smarcel return (0); 826214006Smarcel 827213365Smarcel /* 828214006Smarcel * We failed to mount (a new) root. 829213365Smarcel */ 830214006Smarcel switch (root_mount_onfail) { 831214006Smarcel case A_CONTINUE: 832214006Smarcel break; 833214006Smarcel case A_PANIC: 834214006Smarcel panic("mountroot: unable to (re-)mount root."); 835214006Smarcel /* NOTREACHED */ 836214006Smarcel case A_RETRY: 837214006Smarcel goto retry; 838214006Smarcel case A_REBOOT: 839214006Smarcel kern_reboot(RB_NOSYNC); 840214006Smarcel /* NOTREACHED */ 841213365Smarcel } 842213365Smarcel 843214006Smarcel return (error); 844214006Smarcel} 845214006Smarcel 846214006Smarcelstatic void 847214006Smarcelvfs_mountroot_conf0(struct sbuf *sb) 848214006Smarcel{ 849214006Smarcel char *s, *tok, *mnt, *opt; 850214006Smarcel int error; 851214006Smarcel 852214006Smarcel sbuf_printf(sb, ".onfail panic\n"); 853214006Smarcel sbuf_printf(sb, ".timeout %d\n", root_mount_timeout); 854214006Smarcel if (boothowto & RB_ASKNAME) 855214006Smarcel sbuf_printf(sb, ".ask\n"); 856214006Smarcel#ifdef ROOTDEVNAME 857214006Smarcel if (boothowto & RB_DFLTROOT) 858214006Smarcel sbuf_printf(sb, "%s\n", ROOTDEVNAME); 859214006Smarcel#endif 860213365Smarcel if (boothowto & RB_CDROM) { 861217163Snwhitehorn sbuf_printf(sb, "cd9660:/dev/cd0 ro\n"); 862214006Smarcel sbuf_printf(sb, ".timeout 0\n"); 863289449Sngie sbuf_printf(sb, "cd9660:/dev/cd1 ro\n"); 864214006Smarcel sbuf_printf(sb, ".timeout %d\n", root_mount_timeout); 865214006Smarcel } 866273174Sdavide s = kern_getenv("vfs.root.mountfrom"); 867214006Smarcel if (s != NULL) { 868273174Sdavide opt = kern_getenv("vfs.root.mountfrom.options"); 869214006Smarcel tok = s; 870214006Smarcel error = parse_token(&tok, &mnt); 871214006Smarcel while (!error) { 872214006Smarcel sbuf_printf(sb, "%s %s\n", mnt, 873214006Smarcel (opt != NULL) ? opt : ""); 874214006Smarcel free(mnt, M_TEMP); 875214006Smarcel error = parse_token(&tok, &mnt); 876213365Smarcel } 877214006Smarcel if (opt != NULL) 878214006Smarcel freeenv(opt); 879214006Smarcel freeenv(s); 880213365Smarcel } 881214006Smarcel if (rootdevnames[0] != NULL) 882214006Smarcel sbuf_printf(sb, "%s\n", rootdevnames[0]); 883214006Smarcel if (rootdevnames[1] != NULL) 884214006Smarcel sbuf_printf(sb, "%s\n", rootdevnames[1]); 885214006Smarcel#ifdef ROOTDEVNAME 886214006Smarcel if (!(boothowto & RB_DFLTROOT)) 887214006Smarcel sbuf_printf(sb, "%s\n", ROOTDEVNAME); 888214006Smarcel#endif 889214006Smarcel if (!(boothowto & RB_ASKNAME)) 890214006Smarcel sbuf_printf(sb, ".ask\n"); 891214006Smarcel} 892213365Smarcel 893214006Smarcelstatic int 894214006Smarcelvfs_mountroot_readconf(struct thread *td, struct sbuf *sb) 895214006Smarcel{ 896214006Smarcel static char buf[128]; 897214006Smarcel struct nameidata nd; 898214006Smarcel off_t ofs; 899231949Skib ssize_t resid; 900241896Skib int error, flags, len; 901214006Smarcel 902241896Skib NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/.mount.conf", td); 903214006Smarcel flags = FREAD; 904214006Smarcel error = vn_open(&nd, &flags, 0, NULL); 905214006Smarcel if (error) 906214006Smarcel return (error); 907214006Smarcel 908214006Smarcel NDFREE(&nd, NDF_ONLY_PNBUF); 909214006Smarcel ofs = 0; 910214006Smarcel len = sizeof(buf) - 1; 911214006Smarcel while (1) { 912214006Smarcel error = vn_rdwr(UIO_READ, nd.ni_vp, buf, len, ofs, 913214006Smarcel UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, 914214006Smarcel NOCRED, &resid, td); 915214006Smarcel if (error) 916214006Smarcel break; 917214006Smarcel if (resid == len) 918214006Smarcel break; 919214006Smarcel buf[len - resid] = 0; 920214006Smarcel sbuf_printf(sb, "%s", buf); 921214006Smarcel ofs += len - resid; 922214006Smarcel } 923214006Smarcel 924214006Smarcel VOP_UNLOCK(nd.ni_vp, 0); 925214006Smarcel vn_close(nd.ni_vp, FREAD, td->td_ucred, td); 926214006Smarcel return (error); 927214006Smarcel} 928214006Smarcel 929214006Smarcelstatic void 930214006Smarcelvfs_mountroot_wait(void) 931214006Smarcel{ 932214006Smarcel struct root_hold_token *h; 933214006Smarcel struct timeval lastfail; 934214006Smarcel int curfail; 935214006Smarcel 936214006Smarcel curfail = 0; 937214006Smarcel while (1) { 938214006Smarcel DROP_GIANT(); 939214006Smarcel g_waitidle(); 940214006Smarcel PICKUP_GIANT(); 941267351Smav mtx_lock(&root_holds_mtx); 942214006Smarcel if (LIST_EMPTY(&root_holds)) { 943267351Smav mtx_unlock(&root_holds_mtx); 944214006Smarcel break; 945214006Smarcel } 946214006Smarcel if (ppsratecheck(&lastfail, &curfail, 1)) { 947214006Smarcel printf("Root mount waiting for:"); 948214006Smarcel LIST_FOREACH(h, &root_holds, list) 949214006Smarcel printf(" %s", h->who); 950214006Smarcel printf("\n"); 951214006Smarcel } 952267351Smav msleep(&root_holds, &root_holds_mtx, PZERO | PDROP, "roothold", 953214006Smarcel hz); 954214006Smarcel } 955214006Smarcel} 956214006Smarcel 957290196Straszstatic int 958290196Straszvfs_mountroot_wait_if_neccessary(const char *fs, const char *dev) 959290196Strasz{ 960290196Strasz int delay, timeout; 961290196Strasz 962290196Strasz /* 963290196Strasz * In case of ZFS and NFS we don't have a way to wait for 964290196Strasz * specific device. 965290196Strasz */ 966290196Strasz if (strcmp(fs, "zfs") == 0 || strstr(fs, "nfs") != NULL || 967290196Strasz dev[0] == '\0') { 968290196Strasz vfs_mountroot_wait(); 969290196Strasz return (0); 970290196Strasz } 971290196Strasz 972290196Strasz /* 973290196Strasz * Otherwise, no point in waiting if the device is already there. 974290196Strasz * Note that we must wait for GEOM to finish reconfiguring itself, 975290196Strasz * eg for geom_part(4) to finish tasting. 976290196Strasz */ 977290196Strasz DROP_GIANT(); 978290196Strasz g_waitidle(); 979290196Strasz PICKUP_GIANT(); 980290196Strasz if (parse_mount_dev_present(dev)) 981290196Strasz return (0); 982290196Strasz 983290196Strasz /* 984290196Strasz * No luck. Let's wait. This code looks weird, but it's that way 985290196Strasz * to behave exactly as it used to work before. 986290196Strasz */ 987290196Strasz vfs_mountroot_wait(); 988290196Strasz printf("mountroot: waiting for device %s...\n", dev); 989290196Strasz delay = hz / 10; 990290196Strasz timeout = root_mount_timeout * hz; 991290196Strasz do { 992290196Strasz pause("rmdev", delay); 993290196Strasz timeout -= delay; 994290196Strasz } while (timeout > 0 && !parse_mount_dev_present(dev)); 995290196Strasz 996290196Strasz if (timeout <= 0) 997290196Strasz return (ENODEV); 998290196Strasz 999290196Strasz return (0); 1000290196Strasz} 1001290196Strasz 1002214006Smarcelvoid 1003214006Smarcelvfs_mountroot(void) 1004214006Smarcel{ 1005214006Smarcel struct mount *mp; 1006214006Smarcel struct sbuf *sb; 1007214006Smarcel struct thread *td; 1008214006Smarcel time_t timebase; 1009214006Smarcel int error; 1010214006Smarcel 1011214006Smarcel td = curthread; 1012214006Smarcel 1013214006Smarcel sb = sbuf_new_auto(); 1014214006Smarcel vfs_mountroot_conf0(sb); 1015214006Smarcel sbuf_finish(sb); 1016214006Smarcel 1017214006Smarcel error = vfs_mountroot_devfs(td, &mp); 1018214006Smarcel while (!error) { 1019214006Smarcel error = vfs_mountroot_parse(sb, mp); 1020214006Smarcel if (!error) { 1021288091Sbdrewery vfs_mountroot_shuffle(td, mp); 1022288091Sbdrewery sbuf_clear(sb); 1023288091Sbdrewery error = vfs_mountroot_readconf(td, sb); 1024288091Sbdrewery sbuf_finish(sb); 1025213365Smarcel } 1026213365Smarcel } 1027213365Smarcel 1028214006Smarcel sbuf_delete(sb); 1029213365Smarcel 1030213365Smarcel /* 1031214006Smarcel * Iterate over all currently mounted file systems and use 1032214006Smarcel * the time stamp found to check and/or initialize the RTC. 1033214006Smarcel * Call inittodr() only once and pass it the largest of the 1034214006Smarcel * timestamps we encounter. 1035213365Smarcel */ 1036214006Smarcel timebase = 0; 1037214006Smarcel mtx_lock(&mountlist_mtx); 1038214006Smarcel mp = TAILQ_FIRST(&mountlist); 1039214006Smarcel while (mp != NULL) { 1040214006Smarcel if (mp->mnt_time > timebase) 1041214006Smarcel timebase = mp->mnt_time; 1042214006Smarcel mp = TAILQ_NEXT(mp, mnt_list); 1043214006Smarcel } 1044214006Smarcel mtx_unlock(&mountlist_mtx); 1045214006Smarcel inittodr(timebase); 1046213365Smarcel 1047214006Smarcel /* Keep prison0's root in sync with the global rootvnode. */ 1048214006Smarcel mtx_lock(&prison0.pr_mtx); 1049214006Smarcel prison0.pr_root = rootvnode; 1050214006Smarcel vref(prison0.pr_root); 1051214006Smarcel mtx_unlock(&prison0.pr_mtx); 1052213365Smarcel 1053267351Smav mtx_lock(&root_holds_mtx); 1054214006Smarcel atomic_store_rel_int(&root_mount_complete, 1); 1055214006Smarcel wakeup(&root_mount_complete); 1056267351Smav mtx_unlock(&root_holds_mtx); 1057248645Savg 1058248645Savg EVENTHANDLER_INVOKE(mountroot); 1059213365Smarcel} 1060213365Smarcel 1061213365Smarcelstatic struct mntarg * 1062213365Smarcelparse_mountroot_options(struct mntarg *ma, const char *options) 1063213365Smarcel{ 1064213365Smarcel char *p; 1065213365Smarcel char *name, *name_arg; 1066213365Smarcel char *val, *val_arg; 1067213365Smarcel char *opts; 1068213365Smarcel 1069213365Smarcel if (options == NULL || options[0] == '\0') 1070213365Smarcel return (ma); 1071213365Smarcel 1072213365Smarcel p = opts = strdup(options, M_MOUNT); 1073213365Smarcel if (opts == NULL) { 1074213365Smarcel return (ma); 1075214006Smarcel } 1076213365Smarcel 1077213365Smarcel while((name = strsep(&p, ",")) != NULL) { 1078213365Smarcel if (name[0] == '\0') 1079213365Smarcel break; 1080213365Smarcel 1081213365Smarcel val = strchr(name, '='); 1082213365Smarcel if (val != NULL) { 1083213365Smarcel *val = '\0'; 1084213365Smarcel ++val; 1085213365Smarcel } 1086213365Smarcel if( strcmp(name, "rw") == 0 || 1087213365Smarcel strcmp(name, "noro") == 0) { 1088213365Smarcel /* 1089213365Smarcel * The first time we mount the root file system, 1090213365Smarcel * we need to mount 'ro', so We need to ignore 1091213365Smarcel * 'rw' and 'noro' mount options. 1092213365Smarcel */ 1093213365Smarcel continue; 1094213365Smarcel } 1095213365Smarcel name_arg = strdup(name, M_MOUNT); 1096213365Smarcel val_arg = NULL; 1097214006Smarcel if (val != NULL) 1098213365Smarcel val_arg = strdup(val, M_MOUNT); 1099213365Smarcel 1100213365Smarcel ma = mount_arg(ma, name_arg, val_arg, 1101213365Smarcel (val_arg != NULL ? -1 : 0)); 1102213365Smarcel } 1103213365Smarcel free(opts, M_MOUNT); 1104213365Smarcel return (ma); 1105213365Smarcel} 1106