msdosfs_vfsops.c revision 170188
150477Speter/* $FreeBSD: head/sys/fs/msdosfs/msdosfs_vfsops.c 170188 2007-06-01 17:06:46Z trhodes $ */ 233548Sjkh/* $NetBSD: msdosfs_vfsops.c,v 1.51 1997/11/17 15:36:58 ws Exp $ */ 32893Sdfr 42893Sdfr/*- 533548Sjkh * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. 633548Sjkh * Copyright (C) 1994, 1995, 1997 TooLs GmbH. 72893Sdfr * All rights reserved. 82893Sdfr * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). 92893Sdfr * 102893Sdfr * Redistribution and use in source and binary forms, with or without 112893Sdfr * modification, are permitted provided that the following conditions 122893Sdfr * are met: 132893Sdfr * 1. Redistributions of source code must retain the above copyright 142893Sdfr * notice, this list of conditions and the following disclaimer. 152893Sdfr * 2. Redistributions in binary form must reproduce the above copyright 162893Sdfr * notice, this list of conditions and the following disclaimer in the 172893Sdfr * documentation and/or other materials provided with the distribution. 182893Sdfr * 3. All advertising materials mentioning features or use of this software 192893Sdfr * must display the following acknowledgement: 202893Sdfr * This product includes software developed by TooLs GmbH. 212893Sdfr * 4. The name of TooLs GmbH may not be used to endorse or promote products 222893Sdfr * derived from this software without specific prior written permission. 232893Sdfr * 242893Sdfr * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 252893Sdfr * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 262893Sdfr * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 272893Sdfr * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 282893Sdfr * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 292893Sdfr * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 302893Sdfr * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 312893Sdfr * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 322893Sdfr * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 332893Sdfr * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 342893Sdfr */ 35139776Simp/*- 362893Sdfr * Written by Paul Popelka (paulp@uts.amdahl.com) 378876Srgrimes * 382893Sdfr * You can do anything you want with this software, just don't say you wrote 392893Sdfr * it, and don't remove this notice. 408876Srgrimes * 412893Sdfr * This software is provided "as is". 428876Srgrimes * 432893Sdfr * The author supplies this software to be publicly redistributed on the 442893Sdfr * understanding that the author is not responsible for the correct 452893Sdfr * functioning of this software in any circumstances and is not liable for 462893Sdfr * any damages caused by this software. 478876Srgrimes * 482893Sdfr * October 1992 492893Sdfr */ 502893Sdfr 512893Sdfr#include <sys/param.h> 522893Sdfr#include <sys/systm.h> 5340651Sbde#include <sys/conf.h> 542893Sdfr#include <sys/namei.h> 55164033Srwatson#include <sys/priv.h> 562893Sdfr#include <sys/proc.h> 572893Sdfr#include <sys/kernel.h> 582893Sdfr#include <sys/vnode.h> 592893Sdfr#include <sys/mount.h> 6060041Sphk#include <sys/bio.h> 612893Sdfr#include <sys/buf.h> 6224131Sbde#include <sys/fcntl.h> 632893Sdfr#include <sys/malloc.h> 6433548Sjkh#include <sys/stat.h> /* defines ALLPERMS */ 65120492Sfjoe#include <sys/iconv.h> 66102391Sbde#include <sys/mutex.h> 672893Sdfr 6877162Sru#include <fs/msdosfs/bpb.h> 6977162Sru#include <fs/msdosfs/bootsect.h> 70120492Sfjoe#include <fs/msdosfs/msdosfsmount.h> 7177162Sru#include <fs/msdosfs/direntry.h> 7277162Sru#include <fs/msdosfs/denode.h> 7377162Sru#include <fs/msdosfs/fat.h> 742893Sdfr 75137036Sphk#include <geom/geom.h> 76137036Sphk#include <geom/geom_vfs.h> 77137036Sphk 78138471Sphk/* List of mount options we support */ 79138471Sphkstatic const char *msdosfs_opts[] = { 80138471Sphk "from", 81166559Srodrigc "atime", "export", "force", "sync", 82138471Sphk "uid", "gid", "mask", "dirmask", 83152610Srodrigc "shortname", "shortnames", "longname", "longnames", "nowin95", "win95", 84166340Srodrigc "kiconv", "cs_win", "cs_dos", "cs_local", "large", 85138471Sphk NULL 86138471Sphk}; 87138471Sphk 88102391Sbde#define MSDOSFS_DFLTBSIZE 4096 89102391Sbde 9056674Snyan#if 1 /*def PC98*/ 9156674Snyan/* 9256674Snyan * XXX - The boot signature formatted by NEC PC-98 DOS looks like a 9356674Snyan * garbage or a random value :-{ 9456674Snyan * If you want to use that broken-signatured media, define the 9556674Snyan * following symbol even though PC/AT. 9656674Snyan * (ex. mount PC-98 DOS formatted FD on PC/AT) 9756674Snyan */ 9856674Snyan#define MSDOSFS_NOCHECKSIG 9956674Snyan#endif 10056674Snyan 101151897SrwatsonMALLOC_DEFINE(M_MSDOSFSMNT, "msdosfs_mount", "MSDOSFS mount structure"); 102151897Srwatsonstatic MALLOC_DEFINE(M_MSDOSFSFAT, "msdosfs_fat", "MSDOSFS file allocation table"); 10330309Sphk 104120492Sfjoestruct iconv_functions *msdosfs_iconv = NULL; 105120492Sfjoe 106138471Sphkstatic int update_mp(struct mount *mp, struct thread *td); 107138471Sphkstatic int mountmsdosfs(struct vnode *devvp, struct mount *mp, 108132023Salfred struct thread *td); 109170188Strhodesstatic vfs_fhtovp_t msdosfs_fhtovp; 110138471Sphkstatic vfs_mount_t msdosfs_mount; 111101777Sphkstatic vfs_root_t msdosfs_root; 112101777Sphkstatic vfs_statfs_t msdosfs_statfs; 113101777Sphkstatic vfs_sync_t msdosfs_sync; 114101777Sphkstatic vfs_unmount_t msdosfs_unmount; 11512338Sbde 116134345Stjr/* Maximum length of a character set name (arbitrary). */ 117134345Stjr#define MAXCSLEN 64 118134345Stjr 11933548Sjkhstatic int 120166558Srodrigcupdate_mp(struct mount *mp, struct thread *td) 12133548Sjkh{ 12233548Sjkh struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); 123138471Sphk void *dos, *win, *local; 124138471Sphk int error, v; 12533548Sjkh 126138471Sphk if (!vfs_getopt(mp->mnt_optnew, "kiconv", NULL, NULL)) { 127138471Sphk if (msdosfs_iconv != NULL) { 128138471Sphk error = vfs_getopt(mp->mnt_optnew, 129138471Sphk "cs_win", &win, NULL); 130138471Sphk if (!error) 131138471Sphk error = vfs_getopt(mp->mnt_optnew, 132138471Sphk "cs_local", &local, NULL); 133138471Sphk if (!error) 134138471Sphk error = vfs_getopt(mp->mnt_optnew, 135138471Sphk "cs_dos", &dos, NULL); 136138471Sphk if (!error) { 137138471Sphk msdosfs_iconv->open(win, local, &pmp->pm_u2w); 138138471Sphk msdosfs_iconv->open(local, win, &pmp->pm_w2u); 139138471Sphk msdosfs_iconv->open(dos, local, &pmp->pm_u2d); 140138471Sphk msdosfs_iconv->open(local, dos, &pmp->pm_d2u); 141138471Sphk } 142134345Stjr if (error != 0) 143134345Stjr return (error); 144134345Stjr } else { 145134345Stjr pmp->pm_w2u = NULL; 146134345Stjr pmp->pm_u2w = NULL; 147134345Stjr pmp->pm_d2u = NULL; 148134345Stjr pmp->pm_u2d = NULL; 149134345Stjr } 150134345Stjr } 151134345Stjr 152138471Sphk if (1 == vfs_scanopt(mp->mnt_optnew, "gid", "%d", &v)) 153138471Sphk pmp->pm_gid = v; 154138471Sphk if (1 == vfs_scanopt(mp->mnt_optnew, "uid", "%d", &v)) 155138471Sphk pmp->pm_uid = v; 156138471Sphk if (1 == vfs_scanopt(mp->mnt_optnew, "mask", "%d", &v)) 157138471Sphk pmp->pm_mask = v & ALLPERMS; 158138471Sphk if (1 == vfs_scanopt(mp->mnt_optnew, "dirmask", "%d", &v)) 159138471Sphk pmp->pm_dirmask = v & ALLPERMS; 160138471Sphk vfs_flagopt(mp->mnt_optnew, "shortname", 161138471Sphk &pmp->pm_flags, MSDOSFSMNT_SHORTNAME); 162152595Srodrigc vfs_flagopt(mp->mnt_optnew, "shortnames", 163152595Srodrigc &pmp->pm_flags, MSDOSFSMNT_SHORTNAME); 164138471Sphk vfs_flagopt(mp->mnt_optnew, "longname", 165138471Sphk &pmp->pm_flags, MSDOSFSMNT_LONGNAME); 166152595Srodrigc vfs_flagopt(mp->mnt_optnew, "longnames", 167152595Srodrigc &pmp->pm_flags, MSDOSFSMNT_LONGNAME); 168138471Sphk vfs_flagopt(mp->mnt_optnew, "kiconv", 169138471Sphk &pmp->pm_flags, MSDOSFSMNT_KICONV); 17033548Sjkh 171152610Srodrigc if (vfs_getopt(mp->mnt_optnew, "nowin95", NULL, NULL) == 0) 172152610Srodrigc pmp->pm_flags |= MSDOSFSMNT_NOWIN95; 173152610Srodrigc else 174138471Sphk pmp->pm_flags &= ~MSDOSFSMNT_NOWIN95; 175138471Sphk 17633548Sjkh if (pmp->pm_flags & MSDOSFSMNT_NOWIN95) 17733548Sjkh pmp->pm_flags |= MSDOSFSMNT_SHORTNAME; 17833548Sjkh else if (!(pmp->pm_flags & 17933548Sjkh (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) { 18033548Sjkh struct vnode *rootvp; 18133548Sjkh 18233548Sjkh /* 18333548Sjkh * Try to divine whether to support Win'95 long filenames 18433548Sjkh */ 18533548Sjkh if (FAT32(pmp)) 18633548Sjkh pmp->pm_flags |= MSDOSFSMNT_LONGNAME; 18733548Sjkh else { 188144058Sjeff if ((error = 189144058Sjeff msdosfs_root(mp, LK_EXCLUSIVE, &rootvp, td)) != 0) 19033548Sjkh return error; 19133548Sjkh pmp->pm_flags |= findwin95(VTODE(rootvp)) 19233548Sjkh ? MSDOSFSMNT_LONGNAME 19333548Sjkh : MSDOSFSMNT_SHORTNAME; 19433548Sjkh vput(rootvp); 19533548Sjkh } 19633548Sjkh } 19733548Sjkh return 0; 19833548Sjkh} 19933548Sjkh 200138471Sphkstatic int 201138471Sphkmsdosfs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) 202138471Sphk{ 203138471Sphk struct msdosfs_args args; 204138471Sphk int error; 205138471Sphk 206138471Sphk if (data == NULL) 207138471Sphk return (EINVAL); 208138471Sphk error = copyin(data, &args, sizeof args); 209138471Sphk if (error) 210138471Sphk return (error); 211138471Sphk 212138471Sphk ma = mount_argsu(ma, "from", args.fspec, MAXPATHLEN); 213138471Sphk ma = mount_arg(ma, "export", &args.export, sizeof args.export); 214138471Sphk ma = mount_argf(ma, "uid", "%d", args.uid); 215138471Sphk ma = mount_argf(ma, "gid", "%d", args.gid); 216138471Sphk ma = mount_argf(ma, "mask", "%d", args.mask); 217138471Sphk ma = mount_argf(ma, "dirmask", "%d", args.dirmask); 218138471Sphk 219138471Sphk ma = mount_argb(ma, args.flags & MSDOSFSMNT_SHORTNAME, "noshortname"); 220138471Sphk ma = mount_argb(ma, args.flags & MSDOSFSMNT_LONGNAME, "nolongname"); 221138471Sphk ma = mount_argb(ma, !(args.flags & MSDOSFSMNT_NOWIN95), "nowin95"); 222138471Sphk ma = mount_argb(ma, args.flags & MSDOSFSMNT_KICONV, "nokiconv"); 223138471Sphk 224138471Sphk ma = mount_argsu(ma, "cs_win", args.cs_win, MAXCSLEN); 225138471Sphk ma = mount_argsu(ma, "cs_dos", args.cs_dos, MAXCSLEN); 226138471Sphk ma = mount_argsu(ma, "cs_local", args.cs_local, MAXCSLEN); 227138471Sphk 228138471Sphk error = kernel_mount(ma, flags); 229138471Sphk 230138471Sphk return (error); 231138471Sphk} 232138471Sphk 2332893Sdfr/* 2348876Srgrimes * mp - path - addr in user space of mount point (ie /usr or whatever) 2352893Sdfr * data - addr in user space of mount params including the name of the block 2368876Srgrimes * special file to treat as a filesystem. 2372893Sdfr */ 23812144Sphkstatic int 239138471Sphkmsdosfs_mount(struct mount *mp, struct thread *td) 2402893Sdfr{ 2412893Sdfr struct vnode *devvp; /* vnode for blk device to mount */ 24233548Sjkh /* msdosfs specific mount control block */ 24333548Sjkh struct msdosfsmount *pmp = NULL; 244132902Sphk struct nameidata ndp; 245138689Sphk int error, flags; 24633548Sjkh mode_t accessmode; 247138471Sphk char *from; 2482893Sdfr 249138471Sphk if (vfs_filteropt(mp->mnt_optnew, msdosfs_opts)) 250138471Sphk return (EINVAL); 251138471Sphk 2522893Sdfr /* 25333548Sjkh * If updating, check whether changing from read-only to 25433548Sjkh * read/write; if there is no device name, that's all we do. 2552893Sdfr */ 2562893Sdfr if (mp->mnt_flag & MNT_UPDATE) { 257165836Srodrigc int ro_to_rw = 0; 25833548Sjkh pmp = VFSTOMSDOSFS(mp); 259138689Sphk 260158924Srodrigc if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0)) { 261165022Srodrigc /* 262165022Srodrigc * Forbid export requests if filesystem has 263165022Srodrigc * MSDOSFS_LARGEFS flag set. 264165022Srodrigc */ 265165022Srodrigc if ((pmp->pm_flags & MSDOSFS_LARGEFS) != 0) { 266165022Srodrigc vfs_mount_error(mp, 267165022Srodrigc "MSDOSFS_LARGEFS flag set, cannot export"); 268138689Sphk return (EOPNOTSUPP); 269165022Srodrigc } 270138689Sphk } 271137036Sphk if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && 272138471Sphk vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 273140048Sphk error = VFS_SYNC(mp, MNT_WAIT, td); 274133287Sphk if (error) 275133287Sphk return (error); 2762893Sdfr flags = WRITECLOSE; 2772893Sdfr if (mp->mnt_flag & MNT_FORCE) 2782893Sdfr flags |= FORCECLOSE; 279132023Salfred error = vflush(mp, 0, flags, td); 280138471Sphk if (error) 281138471Sphk return (error); 282137036Sphk DROP_GIANT(); 283137036Sphk g_topology_lock(); 284137036Sphk g_access(pmp->pm_cp, 0, -1, 0); 285137036Sphk g_topology_unlock(); 286137036Sphk PICKUP_GIANT(); 287160939Sdelphij /* Now the volume is clean. Mark it. */ 288160939Sdelphij error = markvoldirty(pmp, 0); 289160939Sdelphij if (error && (flags & FORCECLOSE) == 0) 290160939Sdelphij return (error); 291138471Sphk } else if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && 292138471Sphk !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) { 29333548Sjkh /* 29433548Sjkh * If upgrade to read-write by non-root, then verify 29533548Sjkh * that user has necessary permissions on the device. 29633548Sjkh */ 297164033Srwatson devvp = pmp->pm_devvp; 298164033Srwatson vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, td); 299164033Srwatson error = VOP_ACCESS(devvp, VREAD | VWRITE, 300164033Srwatson td->td_ucred, td); 301164033Srwatson if (error) 302164033Srwatson error = priv_check(td, PRIV_VFS_MOUNT_PERM); 303164033Srwatson if (error) { 30483366Sjulian VOP_UNLOCK(devvp, 0, td); 305164033Srwatson return (error); 30633548Sjkh } 307164033Srwatson VOP_UNLOCK(devvp, 0, td); 308137036Sphk DROP_GIANT(); 309137036Sphk g_topology_lock(); 310137036Sphk error = g_access(pmp->pm_cp, 0, 1, 0); 311137036Sphk g_topology_unlock(); 312137036Sphk PICKUP_GIANT(); 313137036Sphk if (error) 314137036Sphk return (error); 315123963Sbde 316165836Srodrigc ro_to_rw = 1; 317165836Srodrigc } 318165836Srodrigc vfs_flagopt(mp->mnt_optnew, "ro", 319165836Srodrigc &pmp->pm_flags, MSDOSFSMNT_RONLY); 320165836Srodrigc vfs_flagopt(mp->mnt_optnew, "ro", 321165836Srodrigc &mp->mnt_flag, MNT_RDONLY); 322165836Srodrigc 323165836Srodrigc if (ro_to_rw) { 324123963Sbde /* Now that the volume is modifiable, mark it dirty. */ 325123873Strhodes error = markvoldirty(pmp, 1); 326123873Strhodes if (error) 327123963Sbde return (error); 32833548Sjkh } 3292893Sdfr } 3302893Sdfr /* 33133548Sjkh * Not an update, or updating the name: look up the name 332125796Sbde * and verify that it refers to a sensible disk device. 3332893Sdfr */ 334138471Sphk if (vfs_getopt(mp->mnt_optnew, "from", (void **)&from, NULL)) 335138471Sphk return (EINVAL); 336149720Sssouhlal NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, from, td); 337132902Sphk error = namei(&ndp); 33833548Sjkh if (error) 33933548Sjkh return (error); 340132902Sphk devvp = ndp.ni_vp; 341132902Sphk NDFREE(&ndp, NDF_ONLY_PNBUF); 3428876Srgrimes 34355756Sphk if (!vn_isdisk(devvp, &error)) { 344149720Sssouhlal vput(devvp); 34555756Sphk return (error); 3462893Sdfr } 3472893Sdfr /* 34833548Sjkh * If mount by non-root, then verify that user has necessary 34933548Sjkh * permissions on the device. 3502893Sdfr */ 351164033Srwatson accessmode = VREAD; 352164033Srwatson if ((mp->mnt_flag & MNT_RDONLY) == 0) 353164033Srwatson accessmode |= VWRITE; 354164033Srwatson error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td); 355164033Srwatson if (error) 356164033Srwatson error = priv_check(td, PRIV_VFS_MOUNT_PERM); 357164033Srwatson if (error) { 358164033Srwatson vput(devvp); 359164033Srwatson return (error); 36033548Sjkh } 36133548Sjkh if ((mp->mnt_flag & MNT_UPDATE) == 0) { 362138471Sphk error = mountmsdosfs(devvp, mp, td); 36333548Sjkh#ifdef MSDOSFS_DEBUG /* only needed for the printf below */ 36433548Sjkh pmp = VFSTOMSDOSFS(mp); 36533548Sjkh#endif 36633548Sjkh } else { 3672893Sdfr if (devvp != pmp->pm_devvp) 36833548Sjkh error = EINVAL; /* XXX needs translation */ 3692893Sdfr else 370149720Sssouhlal vput(devvp); 3712893Sdfr } 3722893Sdfr if (error) { 3732893Sdfr vrele(devvp); 37433548Sjkh return (error); 37533548Sjkh } 37633548Sjkh 377138471Sphk error = update_mp(mp, td); 37833548Sjkh if (error) { 379134345Stjr if ((mp->mnt_flag & MNT_UPDATE) == 0) 380134345Stjr msdosfs_unmount(mp, MNT_FORCE, td); 3812893Sdfr return error; 3822893Sdfr } 383138471Sphk 384138471Sphk vfs_mountedfrom(mp, from); 3852893Sdfr#ifdef MSDOSFS_DEBUG 386138471Sphk printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap); 3872893Sdfr#endif 38833548Sjkh return (0); 3892893Sdfr} 3902893Sdfr 39112144Sphkstatic int 392166558Srodrigcmountmsdosfs(struct vnode *devvp, struct mount *mp, struct thread *td) 3932893Sdfr{ 39433548Sjkh struct msdosfsmount *pmp; 39533548Sjkh struct buf *bp; 396130585Sphk struct cdev *dev = devvp->v_rdev; 3972893Sdfr union bootsector *bsp; 3982893Sdfr struct byte_bpb33 *b33; 3992893Sdfr struct byte_bpb50 *b50; 40033548Sjkh struct byte_bpb710 *b710; 40133548Sjkh u_int8_t SecPerClust; 40255188Sbp u_long clusters; 40333548Sjkh int ronly, error; 404137036Sphk struct g_consumer *cp; 405137036Sphk struct bufobj *bo; 4062893Sdfr 407138471Sphk ronly = !vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL); 408137036Sphk /* XXX: use VOP_ACCESS to check FS perms */ 409137036Sphk DROP_GIANT(); 410137036Sphk g_topology_lock(); 411137036Sphk error = g_vfs_open(devvp, &cp, "msdos", ronly ? 0 : 1); 412137036Sphk g_topology_unlock(); 413137036Sphk PICKUP_GIANT(); 41483366Sjulian VOP_UNLOCK(devvp, 0, td); 4153152Sphk if (error) 41633548Sjkh return (error); 41733548Sjkh 418137036Sphk bo = &devvp->v_bufobj; 41933548Sjkh bp = NULL; /* both used in error_exit */ 42033548Sjkh pmp = NULL; 42133548Sjkh 4222893Sdfr /* 42333548Sjkh * Read the boot sector of the filesystem, and then check the 42433548Sjkh * boot signature. If not a dos boot sector then error out. 42556674Snyan * 426102391Sbde * NOTE: 2048 is a maximum sector size in current... 4272893Sdfr */ 428102391Sbde error = bread(devvp, 0, 2048, NOCRED, &bp); 4293152Sphk if (error) 4302893Sdfr goto error_exit; 43133548Sjkh bp->b_flags |= B_AGE; 43233548Sjkh bsp = (union bootsector *)bp->b_data; 43333548Sjkh b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB; 43433548Sjkh b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB; 435105655Sjhb b710 = (struct byte_bpb710 *)bsp->bs710.bsBPB; 43633548Sjkh 43756674Snyan#ifndef MSDOSFS_NOCHECKSIG 43887068Sjhb if (bsp->bs50.bsBootSectSig0 != BOOTSIG0 43987068Sjhb || bsp->bs50.bsBootSectSig1 != BOOTSIG1) { 44087068Sjhb error = EINVAL; 44187068Sjhb goto error_exit; 44287068Sjhb } 44356674Snyan#endif 4442893Sdfr 445111119Simp pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK | M_ZERO); 4462893Sdfr pmp->pm_mountp = mp; 447137036Sphk pmp->pm_cp = cp; 448137036Sphk pmp->pm_bo = bo; 4492893Sdfr 4502893Sdfr /* 451166340Srodrigc * Experimental support for large MS-DOS filesystems. 452166340Srodrigc * WARNING: This uses at least 32 bytes of kernel memory (which is not 453166340Srodrigc * reclaimed until the FS is unmounted) for each file on disk to map 454166340Srodrigc * between the 32-bit inode numbers used by VFS and the 64-bit 455166340Srodrigc * pseudo-inode numbers used internally by msdosfs. This is only 456166340Srodrigc * safe to use in certain controlled situations (e.g. read-only FS 457166340Srodrigc * with less than 1 million files). 458166340Srodrigc * Since the mappings do not persist across unmounts (or reboots), these 459166340Srodrigc * filesystems are not suitable for exporting through NFS, or any other 460166340Srodrigc * application that requires fixed inode numbers. 461166340Srodrigc */ 462166340Srodrigc vfs_flagopt(mp->mnt_optnew, "large", &pmp->pm_flags, 463166340Srodrigc MSDOSFS_LARGEFS); 464166340Srodrigc 465166340Srodrigc /* 4662893Sdfr * Compute several useful quantities from the bpb in the 4672893Sdfr * bootsector. Copy in the dos 5 variant of the bpb then fix up 4682893Sdfr * the fields that are different between dos 5 and dos 3.3. 4692893Sdfr */ 47033548Sjkh SecPerClust = b50->bpbSecPerClust; 4712893Sdfr pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec); 472113979Sjhb if (pmp->pm_BytesPerSec < DEV_BSIZE) { 473113979Sjhb error = EINVAL; 474113979Sjhb goto error_exit; 475113979Sjhb } 4762893Sdfr pmp->pm_ResSectors = getushort(b50->bpbResSectors); 4772893Sdfr pmp->pm_FATs = b50->bpbFATs; 4782893Sdfr pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts); 4792893Sdfr pmp->pm_Sectors = getushort(b50->bpbSectors); 4802893Sdfr pmp->pm_FATsecs = getushort(b50->bpbFATsecs); 4812893Sdfr pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack); 4822893Sdfr pmp->pm_Heads = getushort(b50->bpbHeads); 48333548Sjkh pmp->pm_Media = b50->bpbMedia; 4842893Sdfr 48556674Snyan /* calculate the ratio of sector size to DEV_BSIZE */ 48656674Snyan pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE; 48756674Snyan 48887068Sjhb /* XXX - We should probably check more values here */ 48987068Sjhb if (!pmp->pm_BytesPerSec || !SecPerClust 490126998Srwatson || !pmp->pm_Heads 49116363Sasami#ifdef PC98 49287068Sjhb || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 255) { 49316363Sasami#else 49487068Sjhb || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) { 49516363Sasami#endif 49687068Sjhb error = EINVAL; 49787068Sjhb goto error_exit; 49887068Sjhb } 4992893Sdfr 5002893Sdfr if (pmp->pm_Sectors == 0) { 5012893Sdfr pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs); 5022893Sdfr pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors); 5032893Sdfr } else { 5042893Sdfr pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs); 5052893Sdfr pmp->pm_HugeSectors = pmp->pm_Sectors; 5062893Sdfr } 507166340Srodrigc if (!(pmp->pm_flags & MSDOSFS_LARGEFS)) { 508166340Srodrigc if (pmp->pm_HugeSectors > 0xffffffff / 509166340Srodrigc (pmp->pm_BytesPerSec / sizeof(struct direntry)) + 1) { 510166340Srodrigc /* 511166340Srodrigc * We cannot deal currently with this size of disk 512166340Srodrigc * due to fileid limitations (see msdosfs_getattr and 513166340Srodrigc * msdosfs_readdir) 514166340Srodrigc */ 515166340Srodrigc error = EINVAL; 516166340Srodrigc vfs_mount_error(mp, 517166340Srodrigc "Disk too big, try '-o large' mount option"); 518166340Srodrigc goto error_exit; 519166340Srodrigc } 52033548Sjkh } 52133548Sjkh 52233548Sjkh if (pmp->pm_RootDirEnts == 0) { 523150711Speadar if (pmp->pm_Sectors 52433548Sjkh || pmp->pm_FATsecs 52533548Sjkh || getushort(b710->bpbFSVers)) { 52633548Sjkh error = EINVAL; 52735046Sache printf("mountmsdosfs(): bad FAT32 filesystem\n"); 52833548Sjkh goto error_exit; 52933548Sjkh } 53033548Sjkh pmp->pm_fatmask = FAT32_MASK; 53133548Sjkh pmp->pm_fatmult = 4; 53233548Sjkh pmp->pm_fatdiv = 1; 53333548Sjkh pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs); 53433548Sjkh if (getushort(b710->bpbExtFlags) & FATMIRROR) 53533548Sjkh pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM; 53633548Sjkh else 53733548Sjkh pmp->pm_flags |= MSDOSFS_FATMIRROR; 53833548Sjkh } else 53933548Sjkh pmp->pm_flags |= MSDOSFS_FATMIRROR; 54033548Sjkh 54156674Snyan /* 54256674Snyan * Check a few values (could do some more): 54356674Snyan * - logical sector size: power of 2, >= block size 54456674Snyan * - sectors per cluster: power of 2, >= 1 54556674Snyan * - number of sectors: >= 1, <= size of partition 546113979Sjhb * - number of FAT sectors: >= 1 54756674Snyan */ 54856674Snyan if ( (SecPerClust == 0) 54956674Snyan || (SecPerClust & (SecPerClust - 1)) 55056674Snyan || (pmp->pm_BytesPerSec < DEV_BSIZE) 55156674Snyan || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1)) 55256674Snyan || (pmp->pm_HugeSectors == 0) 553113979Sjhb || (pmp->pm_FATsecs == 0) 55456674Snyan ) { 55556674Snyan error = EINVAL; 55656674Snyan goto error_exit; 55756674Snyan } 55833548Sjkh 55956674Snyan pmp->pm_HugeSectors *= pmp->pm_BlkPerSec; 56056674Snyan pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */ 56156674Snyan pmp->pm_FATsecs *= pmp->pm_BlkPerSec; 56256674Snyan SecPerClust *= pmp->pm_BlkPerSec; 56356674Snyan 56456674Snyan pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec; 56556674Snyan 56633548Sjkh if (FAT32(pmp)) { 56733548Sjkh pmp->pm_rootdirblk = getulong(b710->bpbRootClust); 56833548Sjkh pmp->pm_firstcluster = pmp->pm_fatblk 56933548Sjkh + (pmp->pm_FATs * pmp->pm_FATsecs); 57056674Snyan pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec; 57133548Sjkh } else { 57233548Sjkh pmp->pm_rootdirblk = pmp->pm_fatblk + 57333548Sjkh (pmp->pm_FATs * pmp->pm_FATsecs); 57433548Sjkh pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry) 57556674Snyan + DEV_BSIZE - 1) 57656674Snyan / DEV_BSIZE; /* in blocks */ 57733548Sjkh pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize; 57833548Sjkh } 57933548Sjkh 58055188Sbp pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) / 58155188Sbp SecPerClust + 1; 58256674Snyan pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE; /* XXX not used? */ 58333548Sjkh 58433548Sjkh if (pmp->pm_fatmask == 0) { 58533548Sjkh if (pmp->pm_maxcluster 58633548Sjkh <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) { 58733548Sjkh /* 58833548Sjkh * This will usually be a floppy disk. This size makes 58933548Sjkh * sure that one fat entry will not be split across 59033548Sjkh * multiple blocks. 59133548Sjkh */ 59233548Sjkh pmp->pm_fatmask = FAT12_MASK; 59333548Sjkh pmp->pm_fatmult = 3; 59433548Sjkh pmp->pm_fatdiv = 2; 59533548Sjkh } else { 59633548Sjkh pmp->pm_fatmask = FAT16_MASK; 59733548Sjkh pmp->pm_fatmult = 2; 59833548Sjkh pmp->pm_fatdiv = 1; 59933548Sjkh } 60033548Sjkh } 60155188Sbp 60255188Sbp clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv; 60355188Sbp if (pmp->pm_maxcluster >= clusters) { 60455188Sbp printf("Warning: number of clusters (%ld) exceeds FAT " 60555188Sbp "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters); 60655188Sbp pmp->pm_maxcluster = clusters - 1; 60755188Sbp } 60855188Sbp 60955188Sbp 6102893Sdfr if (FAT12(pmp)) 6112893Sdfr pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec; 6122893Sdfr else 613102391Sbde pmp->pm_fatblocksize = MSDOSFS_DFLTBSIZE; 61433548Sjkh 61556674Snyan pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE; 61656674Snyan pmp->pm_bnshift = ffs(DEV_BSIZE) - 1; 6172893Sdfr 6182893Sdfr /* 6192893Sdfr * Compute mask and shift value for isolating cluster relative byte 6202893Sdfr * offsets and cluster numbers from a file offset. 6212893Sdfr */ 62256674Snyan pmp->pm_bpcluster = SecPerClust * DEV_BSIZE; 62333548Sjkh pmp->pm_crbomask = pmp->pm_bpcluster - 1; 62433548Sjkh pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1; 62533548Sjkh 62633548Sjkh /* 62733548Sjkh * Check for valid cluster size 62833548Sjkh * must be a power of 2 62933548Sjkh */ 63033548Sjkh if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) { 6312893Sdfr error = EINVAL; 6322893Sdfr goto error_exit; 6332893Sdfr } 6342893Sdfr 63533548Sjkh /* 63633548Sjkh * Release the bootsector buffer. 63733548Sjkh */ 63833548Sjkh brelse(bp); 63933548Sjkh bp = NULL; 64033548Sjkh 64133548Sjkh /* 64233548Sjkh * Check FSInfo. 64333548Sjkh */ 64433548Sjkh if (pmp->pm_fsinfo) { 64533548Sjkh struct fsinfo *fp; 64633548Sjkh 64756674Snyan if ((error = bread(devvp, pmp->pm_fsinfo, fsi_size(pmp), 64856674Snyan NOCRED, &bp)) != 0) 64933548Sjkh goto error_exit; 65033548Sjkh fp = (struct fsinfo *)bp->b_data; 65133548Sjkh if (!bcmp(fp->fsisig1, "RRaA", 4) 65233548Sjkh && !bcmp(fp->fsisig2, "rrAa", 4) 65333548Sjkh && !bcmp(fp->fsisig3, "\0\0\125\252", 4) 654125934Stjr && !bcmp(fp->fsisig4, "\0\0\125\252", 4)) { 65533548Sjkh pmp->pm_nxtfree = getulong(fp->fsinxtfree); 656125934Stjr if (pmp->pm_nxtfree == 0xffffffff) 657125934Stjr pmp->pm_nxtfree = CLUST_FIRST; 658125934Stjr } else 65933548Sjkh pmp->pm_fsinfo = 0; 66033548Sjkh brelse(bp); 66133548Sjkh bp = NULL; 66216363Sasami } 6632893Sdfr 6642893Sdfr /* 665102295Strhodes * Check and validate (or perhaps invalidate?) the fsinfo structure? 6662893Sdfr */ 667102295Strhodes if (pmp->pm_fsinfo && pmp->pm_nxtfree > pmp->pm_maxcluster) { 668102392Sbde printf( 669102392Sbde "Next free cluster in FSInfo (%lu) exceeds maxcluster (%lu)\n", 670102392Sbde pmp->pm_nxtfree, pmp->pm_maxcluster); 671102295Strhodes error = EINVAL; 672102295Strhodes goto error_exit; 673102295Strhodes } 6742893Sdfr 6752893Sdfr /* 6762893Sdfr * Allocate memory for the bitmap of allocated clusters, and then 6772893Sdfr * fill it in. 6782893Sdfr */ 679126086Sbde pmp->pm_inusemap = malloc(howmany(pmp->pm_maxcluster + 1, N_INUSEBITS) 6802893Sdfr * sizeof(*pmp->pm_inusemap), 681111119Simp M_MSDOSFSFAT, M_WAITOK); 6822893Sdfr 6832893Sdfr /* 6842893Sdfr * fillinusemap() needs pm_devvp. 6852893Sdfr */ 6862893Sdfr pmp->pm_devvp = devvp; 6872893Sdfr 6882893Sdfr /* 6892893Sdfr * Have the inuse map filled in. 6902893Sdfr */ 69133548Sjkh if ((error = fillinusemap(pmp)) != 0) 6922893Sdfr goto error_exit; 6932893Sdfr 6942893Sdfr /* 6952893Sdfr * If they want fat updates to be synchronous then let them suffer 6962893Sdfr * the performance degradation in exchange for the on disk copy of 6972893Sdfr * the fat being correct just about all the time. I suppose this 6982893Sdfr * would be a good thing to turn on if the kernel is still flakey. 6992893Sdfr */ 70033548Sjkh if (mp->mnt_flag & MNT_SYNCHRONOUS) 70133548Sjkh pmp->pm_flags |= MSDOSFSMNT_WAITONFAT; 7022893Sdfr 7032893Sdfr /* 7042893Sdfr * Finish up. 7052893Sdfr */ 70633548Sjkh if (ronly) 70733548Sjkh pmp->pm_flags |= MSDOSFSMNT_RONLY; 708123873Strhodes else { 709123963Sbde /* Mark the volume dirty while it is mounted read/write. */ 710123963Sbde if ((error = markvoldirty(pmp, 1)) != 0) 711123963Sbde goto error_exit; 7122893Sdfr pmp->pm_fmod = 1; 713123873Strhodes } 7142893Sdfr mp->mnt_data = (qaddr_t) pmp; 71550256Sbde mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); 71623134Sbde mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 717162647Stegge MNT_ILOCK(mp); 71823997Speter mp->mnt_flag |= MNT_LOCAL; 719162647Stegge MNT_IUNLOCK(mp); 7202893Sdfr 721166340Srodrigc if (pmp->pm_flags & MSDOSFS_LARGEFS) 722166340Srodrigc msdosfs_fileno_init(mp); 723131523Stjr 7242893Sdfr return 0; 7252893Sdfr 72633548Sjkherror_exit: 72733548Sjkh if (bp) 72833548Sjkh brelse(bp); 729137036Sphk if (cp != NULL) { 730137036Sphk DROP_GIANT(); 731137036Sphk g_topology_lock(); 732140822Sphk g_vfs_close(cp, td); 733137036Sphk g_topology_unlock(); 734137036Sphk PICKUP_GIANT(); 735137036Sphk } 7362893Sdfr if (pmp) { 7372893Sdfr if (pmp->pm_inusemap) 73833548Sjkh free(pmp->pm_inusemap, M_MSDOSFSFAT); 73933548Sjkh free(pmp, M_MSDOSFSMNT); 74033548Sjkh mp->mnt_data = (qaddr_t)0; 7412893Sdfr } 74233548Sjkh return (error); 7432893Sdfr} 7442893Sdfr 7452893Sdfr/* 7462893Sdfr * Unmount the filesystem described by mp. 7472893Sdfr */ 74812144Sphkstatic int 749166558Srodrigcmsdosfs_unmount(struct mount *mp, int mntflags, struct thread *td) 7502893Sdfr{ 75133548Sjkh struct msdosfsmount *pmp; 75233548Sjkh int error, flags; 7532893Sdfr 75433548Sjkh flags = 0; 75533548Sjkh if (mntflags & MNT_FORCE) 7562893Sdfr flags |= FORCECLOSE; 757132023Salfred error = vflush(mp, 0, flags, td); 7583152Sphk if (error) 7592893Sdfr return error; 76033548Sjkh pmp = VFSTOMSDOSFS(mp); 761120492Sfjoe if (pmp->pm_flags & MSDOSFSMNT_KICONV && msdosfs_iconv) { 762120492Sfjoe if (pmp->pm_w2u) 763120492Sfjoe msdosfs_iconv->close(pmp->pm_w2u); 764120492Sfjoe if (pmp->pm_u2w) 765120492Sfjoe msdosfs_iconv->close(pmp->pm_u2w); 766120492Sfjoe if (pmp->pm_d2u) 767120492Sfjoe msdosfs_iconv->close(pmp->pm_d2u); 768120492Sfjoe if (pmp->pm_u2d) 769120492Sfjoe msdosfs_iconv->close(pmp->pm_u2d); 770120492Sfjoe } 771123873Strhodes 772123963Sbde /* If the volume was mounted read/write, mark it clean now. */ 773123963Sbde if ((pmp->pm_flags & MSDOSFSMNT_RONLY) == 0) { 774123963Sbde error = markvoldirty(pmp, 0); 775123963Sbde if (error && (flags & FORCECLOSE) == 0) 776123963Sbde return (error); 777123963Sbde } 77833548Sjkh#ifdef MSDOSFS_DEBUG 77933548Sjkh { 78033548Sjkh struct vnode *vp = pmp->pm_devvp; 78133548Sjkh 782103936Sjeff VI_LOCK(vp); 783142235Sphk vn_printf(vp, 784142235Sphk "msdosfs_umount(): just before calling VOP_CLOSE()\n"); 78533548Sjkh printf("freef %p, freeb %p, mount %p\n", 78671999Sphk TAILQ_NEXT(vp, v_freelist), vp->v_freelist.tqe_prev, 78733548Sjkh vp->v_mount); 78833548Sjkh printf("cleanblkhd %p, dirtyblkhd %p, numoutput %ld, type %d\n", 789136943Sphk TAILQ_FIRST(&vp->v_bufobj.bo_clean.bv_hd), 790136943Sphk TAILQ_FIRST(&vp->v_bufobj.bo_dirty.bv_hd), 791136943Sphk vp->v_bufobj.bo_numoutput, vp->v_type); 792103936Sjeff VI_UNLOCK(vp); 79333548Sjkh } 79433548Sjkh#endif 795137036Sphk DROP_GIANT(); 796137036Sphk g_topology_lock(); 797140822Sphk g_vfs_close(pmp->pm_cp, td); 798137036Sphk g_topology_unlock(); 799137036Sphk PICKUP_GIANT(); 8002893Sdfr vrele(pmp->pm_devvp); 80133548Sjkh free(pmp->pm_inusemap, M_MSDOSFSFAT); 802166340Srodrigc if (pmp->pm_flags & MSDOSFS_LARGEFS) { 803166340Srodrigc msdosfs_fileno_free(mp); 804166340Srodrigc } 80533548Sjkh free(pmp, M_MSDOSFSMNT); 80633548Sjkh mp->mnt_data = (qaddr_t)0; 807162647Stegge MNT_ILOCK(mp); 80823997Speter mp->mnt_flag &= ~MNT_LOCAL; 809162647Stegge MNT_IUNLOCK(mp); 81033548Sjkh return (error); 8112893Sdfr} 8122893Sdfr 81312144Sphkstatic int 814166558Srodrigcmsdosfs_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td) 8152893Sdfr{ 81633548Sjkh struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); 8172893Sdfr struct denode *ndep; 8182893Sdfr int error; 8192893Sdfr 8202893Sdfr#ifdef MSDOSFS_DEBUG 82133548Sjkh printf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp); 8222893Sdfr#endif 82333548Sjkh error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep); 82433548Sjkh if (error) 82533548Sjkh return (error); 82633548Sjkh *vpp = DETOV(ndep); 82733548Sjkh return (0); 8282893Sdfr} 8292893Sdfr 83012144Sphkstatic int 831166558Srodrigcmsdosfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) 8322893Sdfr{ 83333548Sjkh struct msdosfsmount *pmp; 8342893Sdfr 83533548Sjkh pmp = VFSTOMSDOSFS(mp); 8362893Sdfr sbp->f_bsize = pmp->pm_bpcluster; 8372893Sdfr sbp->f_iosize = pmp->pm_bpcluster; 83855188Sbp sbp->f_blocks = pmp->pm_maxcluster + 1; 8392893Sdfr sbp->f_bfree = pmp->pm_freeclustercount; 8402893Sdfr sbp->f_bavail = pmp->pm_freeclustercount; 8412893Sdfr sbp->f_files = pmp->pm_RootDirEnts; /* XXX */ 8422893Sdfr sbp->f_ffree = 0; /* what to put in here? */ 84333548Sjkh return (0); 8442893Sdfr} 8452893Sdfr 84612144Sphkstatic int 847166558Srodrigcmsdosfs_sync(struct mount *mp, int waitfor, struct thread *td) 8482893Sdfr{ 84933548Sjkh struct vnode *vp, *nvp; 8502893Sdfr struct denode *dep; 85133548Sjkh struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); 85233548Sjkh int error, allerror = 0; 8532893Sdfr 8542893Sdfr /* 8552893Sdfr * If we ever switch to not updating all of the fats all the time, 8562893Sdfr * this would be the place to update them from the first one. 8572893Sdfr */ 85846568Speter if (pmp->pm_fmod != 0) { 85933548Sjkh if (pmp->pm_flags & MSDOSFSMNT_RONLY) 8602893Sdfr panic("msdosfs_sync: rofs mod"); 8612893Sdfr else { 8622893Sdfr /* update fats here */ 8632893Sdfr } 86446568Speter } 8652893Sdfr /* 86633548Sjkh * Write back each (modified) denode. 8672893Sdfr */ 868122091Skan MNT_ILOCK(mp); 8692893Sdfrloop: 870131551Sphk MNT_VNODE_FOREACH(vp, mp, nvp) { 871120733Sjeff VI_LOCK(vp); 872143513Sjeff if (vp->v_type == VNON || (vp->v_iflag & VI_DOOMED)) { 873120785Sjeff VI_UNLOCK(vp); 874120785Sjeff continue; 875120785Sjeff } 876122091Skan MNT_IUNLOCK(mp); 8772893Sdfr dep = VTODE(vp); 878137008Sphk if ((dep->de_flag & 87935511Sdt (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 && 880136943Sphk (vp->v_bufobj.bo_dirty.bv_cnt == 0 || 881137008Sphk waitfor == MNT_LAZY)) { 882103936Sjeff VI_UNLOCK(vp); 883122091Skan MNT_ILOCK(mp); 8842893Sdfr continue; 88523134Sbde } 88683366Sjulian error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, td); 88723134Sbde if (error) { 888122091Skan MNT_ILOCK(mp); 88923134Sbde if (error == ENOENT) 89023134Sbde goto loop; 89123134Sbde continue; 89223134Sbde } 893140048Sphk error = VOP_FSYNC(vp, waitfor, td); 8943152Sphk if (error) 8952893Sdfr allerror = error; 896121874Skan VOP_UNLOCK(vp, 0, td); 897121874Skan vrele(vp); 898122091Skan MNT_ILOCK(mp); 8992893Sdfr } 900122091Skan MNT_IUNLOCK(mp); 9012893Sdfr 9022893Sdfr /* 9032893Sdfr * Flush filesystem control info. 9042893Sdfr */ 90535511Sdt if (waitfor != MNT_LAZY) { 90683366Sjulian vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY, td); 907140048Sphk error = VOP_FSYNC(pmp->pm_devvp, waitfor, td); 90835511Sdt if (error) 90935511Sdt allerror = error; 91083366Sjulian VOP_UNLOCK(pmp->pm_devvp, 0, td); 91135511Sdt } 91233548Sjkh return (allerror); 9132893Sdfr} 9142893Sdfr 915170188Strhodesstatic int 916170188Strhodesmsdosfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) 917170188Strhodes{ 918170188Strhodes struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); 919170188Strhodes struct defid *defhp = (struct defid *) fhp; 920170188Strhodes struct denode *dep; 921170188Strhodes int error; 922170188Strhodes 923170188Strhodes error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep); 924170188Strhodes if (error) { 925170188Strhodes *vpp = NULLVP; 926170188Strhodes return (error); 927170188Strhodes } 928170188Strhodes *vpp = DETOV(dep); 929170188Strhodes vnode_create_vobject(*vpp, dep->de_FileSize, curthread); 930170188Strhodes return (0); 931170188Strhodes} 932170188Strhodes 93312145Sphkstatic struct vfsops msdosfs_vfsops = { 934170188Strhodes .vfs_fhtovp = msdosfs_fhtovp, 935138471Sphk .vfs_mount = msdosfs_mount, 936138471Sphk .vfs_cmount = msdosfs_cmount, 937116271Sphk .vfs_root = msdosfs_root, 938116271Sphk .vfs_statfs = msdosfs_statfs, 939116271Sphk .vfs_sync = msdosfs_sync, 940116271Sphk .vfs_unmount = msdosfs_unmount, 9412893Sdfr}; 9422946Swollman 94377577SruVFS_SET(msdosfs_vfsops, msdosfs, 0); 944120492SfjoeMODULE_VERSION(msdosfs, 1); 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