msdosfs_vfsops.c revision 35046
135046Sache/* $Id: msdosfs_vfsops.c,v 1.31 1998/03/20 02:33:40 kato Exp $ */ 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 */ 352893Sdfr/* 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> 532893Sdfr#include <sys/namei.h> 542893Sdfr#include <sys/proc.h> 552893Sdfr#include <sys/kernel.h> 562893Sdfr#include <sys/vnode.h> 572893Sdfr#include <miscfs/specfs/specdev.h> /* XXX */ /* defines v_rdev */ 582893Sdfr#include <sys/mount.h> 592893Sdfr#include <sys/buf.h> 6024131Sbde#include <sys/fcntl.h> 612893Sdfr#include <sys/malloc.h> 6233548Sjkh#include <sys/stat.h> /* defines ALLPERMS */ 632893Sdfr 642893Sdfr#include <msdosfs/bpb.h> 652893Sdfr#include <msdosfs/bootsect.h> 662893Sdfr#include <msdosfs/direntry.h> 672893Sdfr#include <msdosfs/denode.h> 682893Sdfr#include <msdosfs/msdosfsmount.h> 692893Sdfr#include <msdosfs/fat.h> 702893Sdfr 7130354SphkMALLOC_DEFINE(M_MSDOSFSMNT, "MSDOSFS mount", "MSDOSFS mount structure"); 7230354Sphkstatic MALLOC_DEFINE(M_MSDOSFSFAT, "MSDOSFS FAT", "MSDOSFS file allocation table"); 7330309Sphk 7433548Sjkhstatic int update_mp __P((struct mount *mp, struct msdosfs_args *argp)); 7512338Sbdestatic int mountmsdosfs __P((struct vnode *devvp, struct mount *mp, 7633548Sjkh struct proc *p, struct msdosfs_args *argp)); 7712338Sbdestatic int msdosfs_fhtovp __P((struct mount *, struct fid *, 7828270Swollman struct sockaddr *, struct vnode **, int *, 7912338Sbde struct ucred **)); 8012338Sbdestatic int msdosfs_mount __P((struct mount *, char *, caddr_t, 8112338Sbde struct nameidata *, struct proc *)); 8212338Sbdestatic int msdosfs_quotactl __P((struct mount *, int, uid_t, caddr_t, 8312338Sbde struct proc *)); 8412338Sbdestatic int msdosfs_root __P((struct mount *, struct vnode **)); 8512338Sbdestatic int msdosfs_start __P((struct mount *, int, struct proc *)); 8612338Sbdestatic int msdosfs_statfs __P((struct mount *, struct statfs *, 8712338Sbde struct proc *)); 8812338Sbdestatic int msdosfs_sync __P((struct mount *, int, struct ucred *, 8912338Sbde struct proc *)); 9012338Sbdestatic int msdosfs_unmount __P((struct mount *, int, struct proc *)); 9112338Sbdestatic int msdosfs_vget __P((struct mount *mp, ino_t ino, 9212338Sbde struct vnode **vpp)); 9312338Sbdestatic int msdosfs_vptofh __P((struct vnode *, struct fid *)); 9412338Sbde 9533548Sjkhstatic int 9633548Sjkhupdate_mp(mp, argp) 9733548Sjkh struct mount *mp; 9833548Sjkh struct msdosfs_args *argp; 9933548Sjkh{ 10033548Sjkh struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); 10133548Sjkh int error; 10233548Sjkh 10333548Sjkh pmp->pm_gid = argp->gid; 10433548Sjkh pmp->pm_uid = argp->uid; 10533548Sjkh pmp->pm_mask = argp->mask & ALLPERMS; 10633548Sjkh pmp->pm_flags |= argp->flags & MSDOSFSMNT_MNTOPT; 10733768Sache if (pmp->pm_flags & MSDOSFSMNT_U2WTABLE) { 10833747Sache bcopy(argp->u2w, pmp->pm_u2w, sizeof(pmp->pm_u2w)); 10933768Sache bcopy(argp->d2u, pmp->pm_d2u, sizeof(pmp->pm_d2u)); 11033768Sache bcopy(argp->u2d, pmp->pm_u2d, sizeof(pmp->pm_u2d)); 11133768Sache } 11233768Sache if (pmp->pm_flags & MSDOSFSMNT_ULTABLE) { 11333762Sache bcopy(argp->ul, pmp->pm_ul, sizeof(pmp->pm_ul)); 11433768Sache bcopy(argp->lu, pmp->pm_lu, sizeof(pmp->pm_lu)); 11533768Sache } 11633548Sjkh 11733548Sjkh#ifndef __FreeBSD__ 11833548Sjkh /* 11933548Sjkh * GEMDOS knows nothing (yet) about win95 12033548Sjkh */ 12133548Sjkh if (pmp->pm_flags & MSDOSFSMNT_GEMDOSFS) 12233548Sjkh pmp->pm_flags |= MSDOSFSMNT_NOWIN95; 12333548Sjkh#endif 12433548Sjkh 12533548Sjkh if (pmp->pm_flags & MSDOSFSMNT_NOWIN95) 12633548Sjkh pmp->pm_flags |= MSDOSFSMNT_SHORTNAME; 12733548Sjkh else if (!(pmp->pm_flags & 12833548Sjkh (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) { 12933548Sjkh struct vnode *rootvp; 13033548Sjkh 13133548Sjkh /* 13233548Sjkh * Try to divine whether to support Win'95 long filenames 13333548Sjkh */ 13433548Sjkh if (FAT32(pmp)) 13533548Sjkh pmp->pm_flags |= MSDOSFSMNT_LONGNAME; 13633548Sjkh else { 13733548Sjkh if ((error = msdosfs_root(mp, &rootvp)) != 0) 13833548Sjkh return error; 13933548Sjkh pmp->pm_flags |= findwin95(VTODE(rootvp)) 14033548Sjkh ? MSDOSFSMNT_LONGNAME 14133548Sjkh : MSDOSFSMNT_SHORTNAME; 14233548Sjkh vput(rootvp); 14333548Sjkh } 14433548Sjkh } 14533548Sjkh return 0; 14633548Sjkh} 14733548Sjkh 14833548Sjkh#ifndef __FreeBSD__ 14933548Sjkhint 15033548Sjkhmsdosfs_mountroot() 15133548Sjkh{ 15233548Sjkh register struct mount *mp; 15333548Sjkh struct proc *p = curproc; /* XXX */ 15433548Sjkh size_t size; 15533548Sjkh int error; 15633548Sjkh struct msdosfs_args args; 15733548Sjkh 15833548Sjkh if (root_device->dv_class != DV_DISK) 15933548Sjkh return (ENODEV); 16033548Sjkh 16133548Sjkh /* 16233548Sjkh * Get vnodes for swapdev and rootdev. 16333548Sjkh */ 16433548Sjkh if (bdevvp(rootdev, &rootvp)) 16533548Sjkh panic("msdosfs_mountroot: can't setup rootvp"); 16633548Sjkh 16733548Sjkh mp = malloc((u_long)sizeof(struct mount), M_MOUNT, M_WAITOK); 16833548Sjkh bzero((char *)mp, (u_long)sizeof(struct mount)); 16933548Sjkh mp->mnt_op = &msdosfs_vfsops; 17033548Sjkh mp->mnt_flag = 0; 17133548Sjkh LIST_INIT(&mp->mnt_vnodelist); 17233548Sjkh 17333548Sjkh args.flags = 0; 17433548Sjkh args.uid = 0; 17533548Sjkh args.gid = 0; 17633548Sjkh args.mask = 0777; 17733548Sjkh 17833548Sjkh if ((error = mountmsdosfs(rootvp, mp, p, &args)) != 0) { 17933548Sjkh free(mp, M_MOUNT); 18033548Sjkh return (error); 18133548Sjkh } 18233548Sjkh 18333548Sjkh if ((error = update_mp(mp, &args)) != 0) { 18433548Sjkh (void)msdosfs_unmount(mp, 0, p); 18533548Sjkh free(mp, M_MOUNT); 18633548Sjkh return (error); 18733548Sjkh } 18833548Sjkh 18933548Sjkh if ((error = vfs_lock(mp)) != 0) { 19033548Sjkh (void)msdosfs_unmount(mp, 0, p); 19133548Sjkh free(mp, M_MOUNT); 19233548Sjkh return (error); 19333548Sjkh } 19433548Sjkh 19533548Sjkh CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list); 19633548Sjkh mp->mnt_vnodecovered = NULLVP; 19733548Sjkh (void) copystr("/", mp->mnt_stat.f_mntonname, MNAMELEN - 1, 19833548Sjkh &size); 19933548Sjkh bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 20033548Sjkh (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 20133548Sjkh &size); 20233548Sjkh bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 20333548Sjkh (void)msdosfs_statfs(mp, &mp->mnt_stat, p); 20433548Sjkh vfs_unlock(mp); 20533548Sjkh return (0); 20633548Sjkh} 20733548Sjkh#endif 20833548Sjkh 2092893Sdfr/* 2108876Srgrimes * mp - path - addr in user space of mount point (ie /usr or whatever) 2112893Sdfr * data - addr in user space of mount params including the name of the block 2128876Srgrimes * special file to treat as a filesystem. 2132893Sdfr */ 21412144Sphkstatic int 2152893Sdfrmsdosfs_mount(mp, path, data, ndp, p) 2162893Sdfr struct mount *mp; 2172893Sdfr char *path; 2182893Sdfr caddr_t data; 2192893Sdfr struct nameidata *ndp; 2202893Sdfr struct proc *p; 2212893Sdfr{ 2222893Sdfr struct vnode *devvp; /* vnode for blk device to mount */ 2232893Sdfr struct msdosfs_args args; /* will hold data from mount request */ 22433548Sjkh /* msdosfs specific mount control block */ 22533548Sjkh struct msdosfsmount *pmp = NULL; 22633548Sjkh size_t size; 2272893Sdfr int error, flags; 22833548Sjkh mode_t accessmode; 2292893Sdfr 23033548Sjkh error = copyin(data, (caddr_t)&args, sizeof(struct msdosfs_args)); 2313152Sphk if (error) 23233548Sjkh return (error); 23333548Sjkh if (args.magic != MSDOSFS_ARGSMAGIC) { 23433548Sjkh printf("Old mount_msdosfs, flags=%d\n", args.flags); 23533548Sjkh args.flags = 0; 23633548Sjkh } 2372893Sdfr /* 23833548Sjkh * If updating, check whether changing from read-only to 23933548Sjkh * read/write; if there is no device name, that's all we do. 2402893Sdfr */ 2412893Sdfr if (mp->mnt_flag & MNT_UPDATE) { 24233548Sjkh pmp = VFSTOMSDOSFS(mp); 2432893Sdfr error = 0; 24433548Sjkh if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_flag & MNT_RDONLY)) { 2452893Sdfr flags = WRITECLOSE; 2462893Sdfr if (mp->mnt_flag & MNT_FORCE) 2472893Sdfr flags |= FORCECLOSE; 2482893Sdfr error = vflush(mp, NULLVP, flags); 2492893Sdfr } 2502893Sdfr if (!error && (mp->mnt_flag & MNT_RELOAD)) 2512893Sdfr /* not yet implemented */ 25233548Sjkh error = EOPNOTSUPP; 2532893Sdfr if (error) 25433548Sjkh return (error); 25533548Sjkh if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { 25633548Sjkh /* 25733548Sjkh * If upgrade to read-write by non-root, then verify 25833548Sjkh * that user has necessary permissions on the device. 25933548Sjkh */ 26033548Sjkh if (p->p_ucred->cr_uid != 0) { 26133548Sjkh devvp = pmp->pm_devvp; 26233548Sjkh vn_lock(devvp, LK_EXCLUSIVE, p); 26333548Sjkh error = VOP_ACCESS(devvp, VREAD | VWRITE, 26433548Sjkh p->p_ucred, p); 26533548Sjkh if (error) { 26633548Sjkh VOP_UNLOCK(devvp, 0, p); 26733548Sjkh return (error); 26833548Sjkh } 26933548Sjkh VOP_UNLOCK(devvp, 0, p); 27033548Sjkh } 27133548Sjkh pmp->pm_flags &= ~MSDOSFSMNT_RONLY; 27233548Sjkh } 2732893Sdfr if (args.fspec == 0) { 27433548Sjkh#ifdef __notyet__ /* doesn't work correctly with current mountd XXX */ 27533548Sjkh if (args.flags & MSDOSFSMNT_MNTOPT) { 27633548Sjkh pmp->pm_flags &= ~MSDOSFSMNT_MNTOPT; 27733548Sjkh pmp->pm_flags |= args.flags & MSDOSFSMNT_MNTOPT; 27833548Sjkh if (pmp->pm_flags & MSDOSFSMNT_NOWIN95) 27933548Sjkh pmp->pm_flags |= MSDOSFSMNT_SHORTNAME; 28033548Sjkh } 28133548Sjkh#endif 2822893Sdfr /* 2832893Sdfr * Process export requests. 2842893Sdfr */ 28533548Sjkh return (vfs_export(mp, &pmp->pm_export, &args.export)); 2862893Sdfr } 2872893Sdfr } 2882893Sdfr /* 28933548Sjkh * Not an update, or updating the name: look up the name 29033548Sjkh * and verify that it refers to a sensible block device. 2912893Sdfr */ 2922893Sdfr NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p); 2932893Sdfr error = namei(ndp); 29433548Sjkh if (error) 29533548Sjkh return (error); 29633548Sjkh devvp = ndp->ni_vp; 2978876Srgrimes 2982893Sdfr if (devvp->v_type != VBLK) { 2992893Sdfr vrele(devvp); 30033548Sjkh return (ENOTBLK); 3012893Sdfr } 3022893Sdfr if (major(devvp->v_rdev) >= nblkdev) { 3032893Sdfr vrele(devvp); 30433548Sjkh return (ENXIO); 3052893Sdfr } 3062893Sdfr /* 30733548Sjkh * If mount by non-root, then verify that user has necessary 30833548Sjkh * permissions on the device. 3092893Sdfr */ 31033548Sjkh if (p->p_ucred->cr_uid != 0) { 31133548Sjkh accessmode = VREAD; 31233548Sjkh if ((mp->mnt_flag & MNT_RDONLY) == 0) 31333548Sjkh accessmode |= VWRITE; 31433548Sjkh vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 31533548Sjkh error = VOP_ACCESS(devvp, accessmode, p->p_ucred, p); 31633548Sjkh if (error) { 31733548Sjkh vput(devvp); 31833548Sjkh return (error); 31933548Sjkh } 32033548Sjkh VOP_UNLOCK(devvp, 0, p); 32133548Sjkh } 32233548Sjkh if ((mp->mnt_flag & MNT_UPDATE) == 0) { 32333548Sjkh error = mountmsdosfs(devvp, mp, p, &args); 32433548Sjkh#ifdef MSDOSFS_DEBUG /* only needed for the printf below */ 32533548Sjkh pmp = VFSTOMSDOSFS(mp); 32633548Sjkh#endif 32733548Sjkh } else { 3282893Sdfr if (devvp != pmp->pm_devvp) 32933548Sjkh error = EINVAL; /* XXX needs translation */ 3302893Sdfr else 3312893Sdfr vrele(devvp); 3322893Sdfr } 3332893Sdfr if (error) { 3342893Sdfr vrele(devvp); 33533548Sjkh return (error); 33633548Sjkh } 33733548Sjkh 33833548Sjkh error = update_mp(mp, &args); 33933548Sjkh if (error) { 34033548Sjkh msdosfs_unmount(mp, MNT_FORCE, p); 3412893Sdfr return error; 3422893Sdfr } 3432893Sdfr 34433548Sjkh (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); 34533548Sjkh bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size); 34633548Sjkh (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, 34733548Sjkh &size); 34833548Sjkh bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); 3492893Sdfr (void) msdosfs_statfs(mp, &mp->mnt_stat, p); 3502893Sdfr#ifdef MSDOSFS_DEBUG 3513311Sphk printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap); 3522893Sdfr#endif 35333548Sjkh return (0); 3542893Sdfr} 3552893Sdfr 35612144Sphkstatic int 35733548Sjkhmountmsdosfs(devvp, mp, p, argp) 3582893Sdfr struct vnode *devvp; 3592893Sdfr struct mount *mp; 3602893Sdfr struct proc *p; 36133548Sjkh struct msdosfs_args *argp; 3622893Sdfr{ 36333548Sjkh struct msdosfsmount *pmp; 36433548Sjkh struct buf *bp; 3652893Sdfr dev_t dev = devvp->v_rdev; 36633548Sjkh#ifndef __FreeBSD__ 36733548Sjkh struct partinfo dpart; 36833548Sjkh#endif 3692893Sdfr union bootsector *bsp; 3702893Sdfr struct byte_bpb33 *b33; 3712893Sdfr struct byte_bpb50 *b50; 37233548Sjkh struct byte_bpb710 *b710; 37333548Sjkh u_int8_t SecPerClust; 37433548Sjkh int ronly, error; 37533548Sjkh int bsize = 0, dtype = 0, tmp; 3762893Sdfr 3772893Sdfr /* 37833548Sjkh * Disallow multiple mounts of the same device. 37933548Sjkh * Disallow mounting of a device that is currently in use 38033548Sjkh * (except for root, which might share swap device for miniroot). 38133548Sjkh * Flush out any old buffers remaining from a previous use. 3822893Sdfr */ 3833152Sphk error = vfs_mountedon(devvp); 3843152Sphk if (error) 38533548Sjkh return (error); 38633548Sjkh if (vcount(devvp) > 1 && devvp != rootvp) 38733548Sjkh return (EBUSY); 38833548Sjkh vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p); 3893152Sphk error = vinvalbuf(devvp, V_SAVE, p->p_ucred, p, 0, 0); 39033548Sjkh VOP_UNLOCK(devvp, 0, p); 3913152Sphk if (error) 39233548Sjkh return (error); 3932893Sdfr 39433548Sjkh ronly = (mp->mnt_flag & MNT_RDONLY) != 0; 39533548Sjkh error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, p); 3963152Sphk if (error) 39733548Sjkh return (error); 39833548Sjkh 39933548Sjkh bp = NULL; /* both used in error_exit */ 40033548Sjkh pmp = NULL; 40133548Sjkh 40233548Sjkh#ifndef __FreeBSD__ 40333548Sjkh if (argp->flags & MSDOSFSMNT_GEMDOSFS) { 40433548Sjkh /* 40533548Sjkh * We need the disklabel to calculate the size of a FAT entry 40633548Sjkh * later on. Also make sure the partition contains a filesystem 40733548Sjkh * of type FS_MSDOS. This doesn't work for floppies, so we have 40833548Sjkh * to check for them too. 40933548Sjkh * 41033548Sjkh * At least some parts of the msdos fs driver seem to assume 41133548Sjkh * that the size of a disk block will always be 512 bytes. 41233548Sjkh * Let's check it... 41333548Sjkh */ 41433548Sjkh error = VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, 41533548Sjkh FREAD, NOCRED, p); 41633548Sjkh if (error) 41733548Sjkh goto error_exit; 41833548Sjkh tmp = dpart.part->p_fstype; 41933548Sjkh dtype = dpart.disklab->d_type; 42033548Sjkh bsize = dpart.disklab->d_secsize; 42133548Sjkh if (bsize != 512 || (dtype!=DTYPE_FLOPPY && tmp!=FS_MSDOS)) { 42233548Sjkh error = EINVAL; 42333548Sjkh goto error_exit; 42433548Sjkh } 4252893Sdfr } 4262893Sdfr#endif 4272893Sdfr 4282893Sdfr /* 42933548Sjkh * Read the boot sector of the filesystem, and then check the 43033548Sjkh * boot signature. If not a dos boot sector then error out. 4312893Sdfr */ 43216363Sasami#ifdef PC98 43333548Sjkh error = bread(devvp, 0, 1024, NOCRED, &bp); 43416363Sasami#else 43533548Sjkh error = bread(devvp, 0, 512, NOCRED, &bp); 43616363Sasami#endif 4373152Sphk if (error) 4382893Sdfr goto error_exit; 43933548Sjkh bp->b_flags |= B_AGE; 44033548Sjkh bsp = (union bootsector *)bp->b_data; 44133548Sjkh b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB; 44233548Sjkh b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB; 44333548Sjkh b710 = (struct byte_bpb710 *)bsp->bs710.bsPBP; 44433548Sjkh 44533548Sjkh#ifndef __FreeBSD__ 44633548Sjkh if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) { 44733548Sjkh#endif 44833548Sjkh#ifdef PC98 44933765Skato if ((bsp->bs50.bsBootSectSig0 != BOOTSIG0 45033765Skato || bsp->bs50.bsBootSectSig1 != BOOTSIG1) 45133765Skato && (bsp->bs50.bsBootSectSig0 != 0 /* PC98 DOS 3.3x */ 45233765Skato || bsp->bs50.bsBootSectSig1 != 0) 45333765Skato && (bsp->bs50.bsBootSectSig0 != 0x90 /* PC98 DOS 5.0 */ 45433765Skato || bsp->bs50.bsBootSectSig1 != 0x3d) 45533765Skato && (bsp->bs50.bsBootSectSig0 != 0x46 /* PC98 DOS 3.3B */ 45633765Skato || bsp->bs50.bsBootSectSig1 != 0xfa)) { 45716363Sasami#else 45833548Sjkh if (bsp->bs50.bsBootSectSig0 != BOOTSIG0 45933548Sjkh || bsp->bs50.bsBootSectSig1 != BOOTSIG1) { 46016363Sasami#endif 46133548Sjkh error = EINVAL; 46235046Sache printf("mountmsdosfs(): bad signature\n"); 46333548Sjkh goto error_exit; 46433548Sjkh } 46533548Sjkh#ifndef __FreeBSD__ 4662893Sdfr } 4672893Sdfr#endif 4682893Sdfr 4692893Sdfr pmp = malloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK); 4702893Sdfr bzero((caddr_t)pmp, sizeof *pmp); 4712893Sdfr pmp->pm_mountp = mp; 4722893Sdfr 4732893Sdfr /* 4742893Sdfr * Compute several useful quantities from the bpb in the 4752893Sdfr * bootsector. Copy in the dos 5 variant of the bpb then fix up 4762893Sdfr * the fields that are different between dos 5 and dos 3.3. 4772893Sdfr */ 47833548Sjkh SecPerClust = b50->bpbSecPerClust; 4792893Sdfr pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec); 4802893Sdfr pmp->pm_ResSectors = getushort(b50->bpbResSectors); 4812893Sdfr pmp->pm_FATs = b50->bpbFATs; 4822893Sdfr pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts); 4832893Sdfr pmp->pm_Sectors = getushort(b50->bpbSectors); 4842893Sdfr pmp->pm_FATsecs = getushort(b50->bpbFATsecs); 4852893Sdfr pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack); 4862893Sdfr pmp->pm_Heads = getushort(b50->bpbHeads); 48733548Sjkh pmp->pm_Media = b50->bpbMedia; 4882893Sdfr 48933548Sjkh#ifndef __FreeBSD__ 49033548Sjkh if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) { 49133548Sjkh#endif 49233548Sjkh /* XXX - We should probably check more values here */ 49333548Sjkh if (!pmp->pm_BytesPerSec || !SecPerClust 49433548Sjkh || !pmp->pm_Heads || pmp->pm_Heads > 255 49516363Sasami#ifdef PC98 49633548Sjkh || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 255) { 49716363Sasami#else 49833548Sjkh || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) { 49916363Sasami#endif 50033548Sjkh error = EINVAL; 50135046Sache printf("mountmsdosfs(): bad bpb\n"); 50233548Sjkh goto error_exit; 50333548Sjkh } 50433548Sjkh#ifndef __FreeBSD__ 5052893Sdfr } 50633548Sjkh#endif 5072893Sdfr 5082893Sdfr if (pmp->pm_Sectors == 0) { 5092893Sdfr pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs); 5102893Sdfr pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors); 5112893Sdfr } else { 5122893Sdfr pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs); 5132893Sdfr pmp->pm_HugeSectors = pmp->pm_Sectors; 5142893Sdfr } 51533548Sjkh if (pmp->pm_HugeSectors > 0xffffffff / pmp->pm_BytesPerSec + 1) { 51633548Sjkh /* 51733548Sjkh * We cannot deal currently with this size of disk 51833548Sjkh * due to fileid limitations (see msdosfs_getattr and 51933548Sjkh * msdosfs_readdir) 52033548Sjkh */ 52133548Sjkh error = EINVAL; 52235046Sache printf("mountmsdosfs(): disk too big, sorry\n"); 52333548Sjkh goto error_exit; 52433548Sjkh } 52533548Sjkh 52633548Sjkh if (pmp->pm_RootDirEnts == 0) { 52733548Sjkh if (bsp->bs710.bsBootSectSig2 != BOOTSIG2 52833548Sjkh || bsp->bs710.bsBootSectSig3 != BOOTSIG3 52933548Sjkh || pmp->pm_Sectors 53033548Sjkh || pmp->pm_FATsecs 53133548Sjkh || getushort(b710->bpbFSVers)) { 53233548Sjkh error = EINVAL; 53335046Sache printf("mountmsdosfs(): bad FAT32 filesystem\n"); 53433548Sjkh goto error_exit; 53533548Sjkh } 53633548Sjkh pmp->pm_fatmask = FAT32_MASK; 53733548Sjkh pmp->pm_fatmult = 4; 53833548Sjkh pmp->pm_fatdiv = 1; 53933548Sjkh pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs); 54033548Sjkh if (getushort(b710->bpbExtFlags) & FATMIRROR) 54133548Sjkh pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM; 54233548Sjkh else 54333548Sjkh pmp->pm_flags |= MSDOSFS_FATMIRROR; 54433548Sjkh } else 54533548Sjkh pmp->pm_flags |= MSDOSFS_FATMIRROR; 54633548Sjkh 54733548Sjkh#ifndef __FreeBSD__ 54833548Sjkh if (argp->flags & MSDOSFSMNT_GEMDOSFS) { 54933548Sjkh if (FAT32(pmp)) { 55033548Sjkh /* 55133548Sjkh * GEMDOS doesn't know fat32. 55233548Sjkh */ 55333548Sjkh error = EINVAL; 55433548Sjkh goto error_exit; 55533548Sjkh } 55633548Sjkh 55733548Sjkh /* 55833548Sjkh * Check a few values (could do some more): 55933548Sjkh * - logical sector size: power of 2, >= block size 56033548Sjkh * - sectors per cluster: power of 2, >= 1 56133548Sjkh * - number of sectors: >= 1, <= size of partition 56233548Sjkh */ 56333548Sjkh if ( (SecPerClust == 0) 56433548Sjkh || (SecPerClust & (SecPerClust - 1)) 56533548Sjkh || (pmp->pm_BytesPerSec < bsize) 56633548Sjkh || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1)) 56733548Sjkh || (pmp->pm_HugeSectors == 0) 56833548Sjkh || (pmp->pm_HugeSectors * (pmp->pm_BytesPerSec / bsize) 56933548Sjkh > dpart.part->p_size) 57033548Sjkh ) { 57133548Sjkh error = EINVAL; 57233548Sjkh goto error_exit; 57333548Sjkh } 57433548Sjkh /* 57533548Sjkh * XXX - Many parts of the msdos fs driver seem to assume that 57633548Sjkh * the number of bytes per logical sector (BytesPerSec) will 57733548Sjkh * always be the same as the number of bytes per disk block 57833548Sjkh * Let's pretend it is. 57933548Sjkh */ 58033548Sjkh tmp = pmp->pm_BytesPerSec / bsize; 58133548Sjkh pmp->pm_BytesPerSec = bsize; 58233548Sjkh pmp->pm_HugeSectors *= tmp; 58333548Sjkh pmp->pm_HiddenSects *= tmp; 58433548Sjkh pmp->pm_ResSectors *= tmp; 58533548Sjkh pmp->pm_Sectors *= tmp; 58633548Sjkh pmp->pm_FATsecs *= tmp; 58733548Sjkh SecPerClust *= tmp; 58833548Sjkh } 58933548Sjkh#endif 5902893Sdfr pmp->pm_fatblk = pmp->pm_ResSectors; 59133548Sjkh if (FAT32(pmp)) { 59233548Sjkh pmp->pm_rootdirblk = getulong(b710->bpbRootClust); 59333548Sjkh pmp->pm_firstcluster = pmp->pm_fatblk 59433548Sjkh + (pmp->pm_FATs * pmp->pm_FATsecs); 59533548Sjkh pmp->pm_fsinfo = getushort(b710->bpbFSInfo); 59633548Sjkh } else { 59733548Sjkh pmp->pm_rootdirblk = pmp->pm_fatblk + 59833548Sjkh (pmp->pm_FATs * pmp->pm_FATsecs); 59933548Sjkh pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry) 60033548Sjkh + pmp->pm_BytesPerSec - 1) 60133548Sjkh / pmp->pm_BytesPerSec;/* in sectors */ 60233548Sjkh pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize; 60333548Sjkh } 60433548Sjkh 6052893Sdfr pmp->pm_nmbrofclusters = (pmp->pm_HugeSectors - pmp->pm_firstcluster) / 60633548Sjkh SecPerClust; 6072893Sdfr pmp->pm_maxcluster = pmp->pm_nmbrofclusters + 1; 6082893Sdfr pmp->pm_fatsize = pmp->pm_FATsecs * pmp->pm_BytesPerSec; 60933548Sjkh 61033548Sjkh#ifndef __FreeBSD__ 61133548Sjkh if (argp->flags & MSDOSFSMNT_GEMDOSFS) { 61233548Sjkh if ((pmp->pm_nmbrofclusters <= (0xff0 - 2)) 61333548Sjkh && ((dtype == DTYPE_FLOPPY) || ((dtype == DTYPE_VNODE) 61433548Sjkh && ((pmp->pm_Heads == 1) || (pmp->pm_Heads == 2)))) 61533548Sjkh ) { 61633548Sjkh pmp->pm_fatmask = FAT12_MASK; 61733548Sjkh pmp->pm_fatmult = 3; 61833548Sjkh pmp->pm_fatdiv = 2; 61933548Sjkh } else { 62033548Sjkh pmp->pm_fatmask = FAT16_MASK; 62133548Sjkh pmp->pm_fatmult = 2; 62233548Sjkh pmp->pm_fatdiv = 1; 62333548Sjkh } 62433548Sjkh } else 62533548Sjkh#endif 62633548Sjkh if (pmp->pm_fatmask == 0) { 62733548Sjkh if (pmp->pm_maxcluster 62833548Sjkh <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) { 62933548Sjkh /* 63033548Sjkh * This will usually be a floppy disk. This size makes 63133548Sjkh * sure that one fat entry will not be split across 63233548Sjkh * multiple blocks. 63333548Sjkh */ 63433548Sjkh pmp->pm_fatmask = FAT12_MASK; 63533548Sjkh pmp->pm_fatmult = 3; 63633548Sjkh pmp->pm_fatdiv = 2; 63733548Sjkh } else { 63833548Sjkh pmp->pm_fatmask = FAT16_MASK; 63933548Sjkh pmp->pm_fatmult = 2; 64033548Sjkh pmp->pm_fatdiv = 1; 64133548Sjkh } 64233548Sjkh } 6432893Sdfr if (FAT12(pmp)) 6442893Sdfr pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec; 6452893Sdfr else 6462893Sdfr pmp->pm_fatblocksize = MAXBSIZE; 64733548Sjkh 6482893Sdfr pmp->pm_fatblocksec = pmp->pm_fatblocksize / pmp->pm_BytesPerSec; 64933548Sjkh pmp->pm_bnshift = ffs(pmp->pm_BytesPerSec) - 1; 6502893Sdfr 6512893Sdfr /* 6522893Sdfr * Compute mask and shift value for isolating cluster relative byte 6532893Sdfr * offsets and cluster numbers from a file offset. 6542893Sdfr */ 65533548Sjkh pmp->pm_bpcluster = SecPerClust * pmp->pm_BytesPerSec; 65633548Sjkh pmp->pm_crbomask = pmp->pm_bpcluster - 1; 65733548Sjkh pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1; 65833548Sjkh 65933548Sjkh /* 66033548Sjkh * Check for valid cluster size 66133548Sjkh * must be a power of 2 66233548Sjkh */ 66333548Sjkh if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) { 6642893Sdfr error = EINVAL; 6652893Sdfr goto error_exit; 6662893Sdfr } 6672893Sdfr 66833548Sjkh /* 66933548Sjkh * Release the bootsector buffer. 67033548Sjkh */ 67133548Sjkh brelse(bp); 67233548Sjkh bp = NULL; 67333548Sjkh 67433548Sjkh /* 67533548Sjkh * Check FSInfo. 67633548Sjkh */ 67733548Sjkh if (pmp->pm_fsinfo) { 67833548Sjkh struct fsinfo *fp; 67933548Sjkh 68033548Sjkh if ((error = bread(devvp, pmp->pm_fsinfo, 1024, NOCRED, &bp)) != 0) 68133548Sjkh goto error_exit; 68233548Sjkh fp = (struct fsinfo *)bp->b_data; 68333548Sjkh if (!bcmp(fp->fsisig1, "RRaA", 4) 68433548Sjkh && !bcmp(fp->fsisig2, "rrAa", 4) 68533548Sjkh && !bcmp(fp->fsisig3, "\0\0\125\252", 4) 68633548Sjkh && !bcmp(fp->fsisig4, "\0\0\125\252", 4)) 68733548Sjkh pmp->pm_nxtfree = getulong(fp->fsinxtfree); 68833548Sjkh else 68933548Sjkh pmp->pm_fsinfo = 0; 69033548Sjkh brelse(bp); 69133548Sjkh bp = NULL; 69216363Sasami } 6932893Sdfr 6942893Sdfr /* 69533548Sjkh * Check and validate (or perhaps invalidate?) the fsinfo structure? XXX 6962893Sdfr */ 6972893Sdfr 6982893Sdfr /* 6992893Sdfr * Allocate memory for the bitmap of allocated clusters, and then 7002893Sdfr * fill it in. 7012893Sdfr */ 7022893Sdfr pmp->pm_inusemap = malloc(((pmp->pm_maxcluster + N_INUSEBITS - 1) 7032893Sdfr / N_INUSEBITS) 7042893Sdfr * sizeof(*pmp->pm_inusemap), 7052893Sdfr M_MSDOSFSFAT, M_WAITOK); 7062893Sdfr 7072893Sdfr /* 7082893Sdfr * fillinusemap() needs pm_devvp. 7092893Sdfr */ 7102893Sdfr pmp->pm_dev = dev; 7112893Sdfr pmp->pm_devvp = devvp; 7122893Sdfr 7132893Sdfr /* 7142893Sdfr * Have the inuse map filled in. 7152893Sdfr */ 71633548Sjkh if ((error = fillinusemap(pmp)) != 0) 7172893Sdfr goto error_exit; 7182893Sdfr 7192893Sdfr /* 7202893Sdfr * If they want fat updates to be synchronous then let them suffer 7212893Sdfr * the performance degradation in exchange for the on disk copy of 7222893Sdfr * the fat being correct just about all the time. I suppose this 7232893Sdfr * would be a good thing to turn on if the kernel is still flakey. 7242893Sdfr */ 72533548Sjkh if (mp->mnt_flag & MNT_SYNCHRONOUS) 72633548Sjkh pmp->pm_flags |= MSDOSFSMNT_WAITONFAT; 7272893Sdfr 7282893Sdfr /* 7292893Sdfr * Finish up. 7302893Sdfr */ 73133548Sjkh if (ronly) 73233548Sjkh pmp->pm_flags |= MSDOSFSMNT_RONLY; 73333548Sjkh else 7342893Sdfr pmp->pm_fmod = 1; 7352893Sdfr mp->mnt_data = (qaddr_t) pmp; 73623134Sbde mp->mnt_stat.f_fsid.val[0] = (long)dev; 73723134Sbde mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; 73823997Speter mp->mnt_flag |= MNT_LOCAL; 73934266Sjulian devvp->v_specmountpoint = mp; 7402893Sdfr 7412893Sdfr return 0; 7422893Sdfr 74333548Sjkherror_exit: 74433548Sjkh if (bp) 74533548Sjkh brelse(bp); 74633548Sjkh (void) VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE, NOCRED, p); 7472893Sdfr if (pmp) { 7482893Sdfr if (pmp->pm_inusemap) 74933548Sjkh free(pmp->pm_inusemap, M_MSDOSFSFAT); 75033548Sjkh free(pmp, M_MSDOSFSMNT); 75133548Sjkh mp->mnt_data = (qaddr_t)0; 7522893Sdfr } 75333548Sjkh return (error); 7542893Sdfr} 7552893Sdfr 75612144Sphkstatic int 7572893Sdfrmsdosfs_start(mp, flags, p) 7582893Sdfr struct mount *mp; 7592893Sdfr int flags; 7602893Sdfr struct proc *p; 7612893Sdfr{ 76233548Sjkh 76333548Sjkh return (0); 7642893Sdfr} 7652893Sdfr 7662893Sdfr/* 7672893Sdfr * Unmount the filesystem described by mp. 7682893Sdfr */ 76912144Sphkstatic int 7702893Sdfrmsdosfs_unmount(mp, mntflags, p) 7712893Sdfr struct mount *mp; 7722893Sdfr int mntflags; 7732893Sdfr struct proc *p; 7742893Sdfr{ 77533548Sjkh struct msdosfsmount *pmp; 77633548Sjkh int error, flags; 7772893Sdfr 77833548Sjkh flags = 0; 77933548Sjkh if (mntflags & MNT_FORCE) 7802893Sdfr flags |= FORCECLOSE; 7813152Sphk error = vflush(mp, NULLVP, flags); 7823152Sphk if (error) 7832893Sdfr return error; 78433548Sjkh pmp = VFSTOMSDOSFS(mp); 78534266Sjulian pmp->pm_devvp->v_specmountpoint = NULL; 78633548Sjkh#ifdef MSDOSFS_DEBUG 78733548Sjkh { 78833548Sjkh struct vnode *vp = pmp->pm_devvp; 78933548Sjkh 79033548Sjkh printf("msdosfs_umount(): just before calling VOP_CLOSE()\n"); 79133548Sjkh printf("flag %08lx, usecount %d, writecount %d, holdcnt %ld\n", 79233548Sjkh vp->v_flag, vp->v_usecount, vp->v_writecount, vp->v_holdcnt); 79333548Sjkh printf("lastr %d, id %lu, mount %p, op %p\n", 79433548Sjkh vp->v_lastr, vp->v_id, vp->v_mount, vp->v_op); 79533548Sjkh printf("freef %p, freeb %p, mount %p\n", 79633548Sjkh vp->v_freelist.tqe_next, vp->v_freelist.tqe_prev, 79733548Sjkh vp->v_mount); 79833548Sjkh printf("cleanblkhd %p, dirtyblkhd %p, numoutput %ld, type %d\n", 79933548Sjkh vp->v_cleanblkhd.lh_first, 80033548Sjkh vp->v_dirtyblkhd.lh_first, 80133548Sjkh vp->v_numoutput, vp->v_type); 80233548Sjkh printf("union %p, tag %d, data[0] %08x, data[1] %08x\n", 80333548Sjkh vp->v_socket, vp->v_tag, 80433548Sjkh ((u_int *)vp->v_data)[0], 80533548Sjkh ((u_int *)vp->v_data)[1]); 80633548Sjkh } 80733548Sjkh#endif 80834266Sjulian error = VOP_CLOSE(pmp->pm_devvp, 80934266Sjulian (pmp->pm_flags&MSDOSFSMNT_RONLY) ? FREAD : FREAD | FWRITE, 81034266Sjulian NOCRED, p); 8112893Sdfr vrele(pmp->pm_devvp); 81233548Sjkh free(pmp->pm_inusemap, M_MSDOSFSFAT); 81333548Sjkh free(pmp, M_MSDOSFSMNT); 81433548Sjkh mp->mnt_data = (qaddr_t)0; 81523997Speter mp->mnt_flag &= ~MNT_LOCAL; 81633548Sjkh return (error); 8172893Sdfr} 8182893Sdfr 81912144Sphkstatic int 8202893Sdfrmsdosfs_root(mp, vpp) 8212893Sdfr struct mount *mp; 8222893Sdfr struct vnode **vpp; 8232893Sdfr{ 82433548Sjkh struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); 8252893Sdfr struct denode *ndep; 8262893Sdfr int error; 8272893Sdfr 8282893Sdfr#ifdef MSDOSFS_DEBUG 82933548Sjkh printf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp); 8302893Sdfr#endif 83133548Sjkh error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep); 83233548Sjkh if (error) 83333548Sjkh return (error); 83433548Sjkh *vpp = DETOV(ndep); 83533548Sjkh return (0); 8362893Sdfr} 8372893Sdfr 83812144Sphkstatic int 8392893Sdfrmsdosfs_quotactl(mp, cmds, uid, arg, p) 8402893Sdfr struct mount *mp; 8412893Sdfr int cmds; 8422893Sdfr uid_t uid; 8432893Sdfr caddr_t arg; 8442893Sdfr struct proc *p; 8452893Sdfr{ 8463152Sphk return EOPNOTSUPP; 8472893Sdfr} 8482893Sdfr 84912144Sphkstatic int 8502893Sdfrmsdosfs_statfs(mp, sbp, p) 8512893Sdfr struct mount *mp; 8522893Sdfr struct statfs *sbp; 8532893Sdfr struct proc *p; 8542893Sdfr{ 85533548Sjkh struct msdosfsmount *pmp; 8562893Sdfr 85733548Sjkh pmp = VFSTOMSDOSFS(mp); 8582893Sdfr sbp->f_bsize = pmp->pm_bpcluster; 8592893Sdfr sbp->f_iosize = pmp->pm_bpcluster; 8602893Sdfr sbp->f_blocks = pmp->pm_nmbrofclusters; 8612893Sdfr sbp->f_bfree = pmp->pm_freeclustercount; 8622893Sdfr sbp->f_bavail = pmp->pm_freeclustercount; 8632893Sdfr sbp->f_files = pmp->pm_RootDirEnts; /* XXX */ 8642893Sdfr sbp->f_ffree = 0; /* what to put in here? */ 8652893Sdfr if (sbp != &mp->mnt_stat) { 86623134Sbde sbp->f_type = mp->mnt_vfc->vfc_typenum; 86733548Sjkh bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); 86833548Sjkh bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); 8692893Sdfr } 87033548Sjkh strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); 87133548Sjkh return (0); 8722893Sdfr} 8732893Sdfr 87412144Sphkstatic int 8752893Sdfrmsdosfs_sync(mp, waitfor, cred, p) 8762893Sdfr struct mount *mp; 8772893Sdfr int waitfor; 8782893Sdfr struct ucred *cred; 8792893Sdfr struct proc *p; 8802893Sdfr{ 88133548Sjkh struct vnode *vp, *nvp; 8822893Sdfr struct denode *dep; 88333548Sjkh struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); 88433548Sjkh int error, allerror = 0; 8852893Sdfr 8862893Sdfr /* 8872893Sdfr * If we ever switch to not updating all of the fats all the time, 8882893Sdfr * this would be the place to update them from the first one. 8892893Sdfr */ 89033548Sjkh if (pmp->pm_fmod != 0) 89133548Sjkh if (pmp->pm_flags & MSDOSFSMNT_RONLY) 8922893Sdfr panic("msdosfs_sync: rofs mod"); 8932893Sdfr else { 8942893Sdfr /* update fats here */ 8952893Sdfr } 8962893Sdfr /* 89733548Sjkh * Write back each (modified) denode. 8982893Sdfr */ 89923134Sbde simple_lock(&mntvnode_slock); 9002893Sdfrloop: 90133548Sjkh for (vp = mp->mnt_vnodelist.lh_first; 90233548Sjkh vp != NULL; 90333548Sjkh vp = nvp) { 90433548Sjkh /* 90533548Sjkh * If the vnode that we are about to sync is no longer 90633548Sjkh * assoicated with this mount point, start over. 90733548Sjkh */ 90833548Sjkh if (vp->v_mount != mp) 9092893Sdfr goto loop; 91033548Sjkh 91123134Sbde simple_lock(&vp->v_interlock); 91233548Sjkh nvp = vp->v_mntvnodes.le_next; 9132893Sdfr dep = VTODE(vp); 91434266Sjulian if (vp->v_type == VNON 91534266Sjulian || (waitfor == MNT_LAZY) /* can this happen with msdosfs? */ 91634266Sjulian || (((dep->de_flag & 91734266Sjulian (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0) 91834266Sjulian && (vp->v_dirtyblkhd.lh_first == NULL))) { 91923134Sbde simple_unlock(&vp->v_interlock); 9202893Sdfr continue; 92123134Sbde } 92223134Sbde simple_unlock(&mntvnode_slock); 92323134Sbde error = vget(vp, LK_EXCLUSIVE | LK_NOWAIT | LK_INTERLOCK, p); 92423134Sbde if (error) { 92523134Sbde simple_lock(&mntvnode_slock); 92623134Sbde if (error == ENOENT) 92723134Sbde goto loop; 92823134Sbde continue; 92923134Sbde } 9303152Sphk error = VOP_FSYNC(vp, cred, waitfor, p); 9313152Sphk if (error) 9322893Sdfr allerror = error; 93323134Sbde VOP_UNLOCK(vp, 0, p); 93423134Sbde vrele(vp); /* done with this one */ 93523134Sbde simple_lock(&mntvnode_slock); 9362893Sdfr } 93723134Sbde simple_unlock(&mntvnode_slock); 9382893Sdfr 9392893Sdfr /* 9402893Sdfr * Flush filesystem control info. 9412893Sdfr */ 9423152Sphk error = VOP_FSYNC(pmp->pm_devvp, cred, waitfor, p); 9433152Sphk if (error) 9442893Sdfr allerror = error; 94533548Sjkh return (allerror); 9462893Sdfr} 9472893Sdfr 94812144Sphkstatic int 9492893Sdfrmsdosfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp) 9502893Sdfr struct mount *mp; 9512893Sdfr struct fid *fhp; 95228270Swollman struct sockaddr *nam; 9532893Sdfr struct vnode **vpp; 9542893Sdfr int *exflagsp; 9552893Sdfr struct ucred **credanonp; 9562893Sdfr{ 95733548Sjkh struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); 9582893Sdfr struct defid *defhp = (struct defid *) fhp; 9592893Sdfr struct denode *dep; 9602893Sdfr struct netcred *np; 9612893Sdfr int error; 9622893Sdfr 9632893Sdfr np = vfs_export_lookup(mp, &pmp->pm_export, nam); 9642893Sdfr if (np == NULL) 96533548Sjkh return (EACCES); 96633548Sjkh error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep); 9672893Sdfr if (error) { 9682893Sdfr *vpp = NULLVP; 96933548Sjkh return (error); 9702893Sdfr } 9712893Sdfr *vpp = DETOV(dep); 9722893Sdfr *exflagsp = np->netc_exflags; 9732893Sdfr *credanonp = &np->netc_anon; 97433548Sjkh return (0); 9752893Sdfr} 9762893Sdfr 97712144Sphkstatic int 9782893Sdfrmsdosfs_vptofh(vp, fhp) 9792893Sdfr struct vnode *vp; 9802893Sdfr struct fid *fhp; 9812893Sdfr{ 98233548Sjkh struct denode *dep; 98333548Sjkh struct defid *defhp; 9842893Sdfr 98533548Sjkh dep = VTODE(vp); 98633548Sjkh defhp = (struct defid *)fhp; 9872893Sdfr defhp->defid_len = sizeof(struct defid); 9882893Sdfr defhp->defid_dirclust = dep->de_dirclust; 9892893Sdfr defhp->defid_dirofs = dep->de_diroffset; 99033548Sjkh /* defhp->defid_gen = dep->de_gen; */ 99133548Sjkh return (0); 9922893Sdfr} 9932893Sdfr 99412144Sphkstatic int 9952893Sdfrmsdosfs_vget(mp, ino, vpp) 9962893Sdfr struct mount *mp; 9972893Sdfr ino_t ino; 9982893Sdfr struct vnode **vpp; 9992893Sdfr{ 10002893Sdfr return EOPNOTSUPP; 10012893Sdfr} 10022893Sdfr 100312145Sphkstatic struct vfsops msdosfs_vfsops = { 10042893Sdfr msdosfs_mount, 10052893Sdfr msdosfs_start, 10062893Sdfr msdosfs_unmount, 10072893Sdfr msdosfs_root, 10082893Sdfr msdosfs_quotactl, 10092893Sdfr msdosfs_statfs, 10102893Sdfr msdosfs_sync, 10112893Sdfr msdosfs_vget, 101233964Smsmith vfs_vrele, 10132893Sdfr msdosfs_fhtovp, 10142893Sdfr msdosfs_vptofh, 10152893Sdfr msdosfs_init 10162893Sdfr}; 10172946Swollman 10182946SwollmanVFS_SET(msdosfs_vfsops, msdos, MOUNT_MSDOS, 0); 1019