/* $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/sys/msdosfs/Attic/msdosfs_vfsops.c,v 1.60.2.8 2004/03/02 09:43:04 tjr Exp $ */ /* $DragonFly: src/sys/vfs/msdosfs/msdosfs_vfsops.c,v 1.42 2006/10/27 04:56:34 dillon Exp $ */ /* $NetBSD: msdosfs_vfsops.c,v 1.51 1997/11/17 15:36:58 ws Exp $ */ /*- * Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank. * Copyright (C) 1994, 1995, 1997 TooLs GmbH. * All rights reserved. * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Written by Paul Popelka (paulp@uts.amdahl.com) * * You can do anything you want with this software, just don't say you wrote * it, and don't remove this notice. * * This software is provided "as is". * * The author supplies this software to be publicly redistributed on the * understanding that the author is not responsible for the correct * functioning of this software in any circumstances and is not liable for * any damages caused by this software. * * October 1992 */ #include #include #include #include #include #include #include #include #include #include #include #include /* defines ALLPERMS */ #include #include "bpb.h" #include "bootsect.h" #include "direntry.h" #include "denode.h" #include "msdosfsmount.h" #include "fat.h" extern struct vop_ops msdosfs_vnode_vops; #define MSDOSFS_DFLTBSIZE 4096 #if 1 /*def PC98*/ /* * XXX - The boot signature formatted by NEC PC-98 DOS looks like a * garbage or a random value :-{ * If you want to use that broken-signatured media, define the * following symbol even though PC/AT. * (ex. mount PC-98 DOS formatted FD on PC/AT) */ #define MSDOSFS_NOCHECKSIG #endif MALLOC_DEFINE(M_MSDOSFSMNT, "MSDOSFS mount", "MSDOSFS mount structure"); static MALLOC_DEFINE(M_MSDOSFSFAT, "MSDOSFS FAT", "MSDOSFS file allocation table"); static int update_mp (struct mount *mp, struct msdosfs_args *argp); static int mountmsdosfs (struct vnode *devvp, struct mount *mp, struct msdosfs_args *argp); static int msdosfs_fhtovp (struct mount *, struct fid *, struct vnode **); static int msdosfs_checkexp (struct mount *, struct sockaddr *, int *, struct ucred **); static int msdosfs_mount (struct mount *, char *, caddr_t, struct ucred *); static int msdosfs_root (struct mount *, struct vnode **); static int msdosfs_statfs (struct mount *, struct statfs *, struct ucred *); static int msdosfs_sync (struct mount *, int); static int msdosfs_unmount (struct mount *, int); static int msdosfs_vptofh (struct vnode *, struct fid *); static int update_mp(struct mount *mp, struct msdosfs_args *argp) { struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); int error; pmp->pm_gid = argp->gid; pmp->pm_uid = argp->uid; pmp->pm_mask = argp->mask & ALLPERMS; pmp->pm_flags |= argp->flags & MSDOSFSMNT_MNTOPT; if (pmp->pm_flags & MSDOSFSMNT_U2WTABLE) { bcopy(argp->u2w, pmp->pm_u2w, sizeof(pmp->pm_u2w)); bcopy(argp->d2u, pmp->pm_d2u, sizeof(pmp->pm_d2u)); bcopy(argp->u2d, pmp->pm_u2d, sizeof(pmp->pm_u2d)); } if (pmp->pm_flags & MSDOSFSMNT_ULTABLE) { bcopy(argp->ul, pmp->pm_ul, sizeof(pmp->pm_ul)); bcopy(argp->lu, pmp->pm_lu, sizeof(pmp->pm_lu)); } #ifndef __DragonFly__ /* * GEMDOS knows nothing (yet) about win95 */ if (pmp->pm_flags & MSDOSFSMNT_GEMDOSFS) pmp->pm_flags |= MSDOSFSMNT_NOWIN95; #endif if (pmp->pm_flags & MSDOSFSMNT_NOWIN95) pmp->pm_flags |= MSDOSFSMNT_SHORTNAME; else if (!(pmp->pm_flags & (MSDOSFSMNT_SHORTNAME | MSDOSFSMNT_LONGNAME))) { struct vnode *rootvp; /* * Try to divine whether to support Win'95 long filenames */ if (FAT32(pmp)) pmp->pm_flags |= MSDOSFSMNT_LONGNAME; else { if ((error = msdosfs_root(mp, &rootvp)) != 0) return error; pmp->pm_flags |= findwin95(VTODE(rootvp)) ? MSDOSFSMNT_LONGNAME : MSDOSFSMNT_SHORTNAME; vput(rootvp); } } return 0; } /* * mp - path - addr in user space of mount point (ie /usr or whatever) * data - addr in user space of mount params including the name of the block * special file to treat as a filesystem. */ static int msdosfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) { struct vnode *devvp; /* vnode for blk device to mount */ struct msdosfs_args args; /* will hold data from mount request */ /* msdosfs specific mount control block */ struct msdosfsmount *pmp = NULL; size_t size; int error, flags; mode_t accessmode; struct nlookupdata nd; error = copyin(data, (caddr_t)&args, sizeof(struct msdosfs_args)); if (error) return (error); if (args.magic != MSDOSFS_ARGSMAGIC) args.flags = 0; /* * If updating, check whether changing from read-only to * read/write; if there is no device name, that's all we do. */ if (mp->mnt_flag & MNT_UPDATE) { pmp = VFSTOMSDOSFS(mp); error = 0; if (!(pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_flag & MNT_RDONLY)) { flags = WRITECLOSE; if (mp->mnt_flag & MNT_FORCE) flags |= FORCECLOSE; error = vflush(mp, 0, flags); } if (!error && (mp->mnt_flag & MNT_RELOAD)) /* not yet implemented */ error = EOPNOTSUPP; if (error) return (error); if ((pmp->pm_flags & MSDOSFSMNT_RONLY) && (mp->mnt_kern_flag & MNTK_WANTRDWR)) { /* * If upgrade to read-write by non-root, then verify * that user has necessary permissions on the device. */ if (cred->cr_uid != 0) { devvp = pmp->pm_devvp; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); error = VOP_ACCESS(devvp, VREAD | VWRITE, cred); if (error) { vn_unlock(devvp); return (error); } vn_unlock(devvp); } pmp->pm_flags &= ~MSDOSFSMNT_RONLY; } if (args.fspec == 0) { #ifdef __notyet__ /* doesn't work correctly with current mountd XXX */ if (args.flags & MSDOSFSMNT_MNTOPT) { pmp->pm_flags &= ~MSDOSFSMNT_MNTOPT; pmp->pm_flags |= args.flags & MSDOSFSMNT_MNTOPT; if (pmp->pm_flags & MSDOSFSMNT_NOWIN95) pmp->pm_flags |= MSDOSFSMNT_SHORTNAME; } #endif /* * Process export requests. */ return (vfs_export(mp, &pmp->pm_export, &args.export)); } } /* * Not an update, or updating the name: look up the name * and verify that it refers to a sensible block device. */ devvp = NULL; error = nlookup_init(&nd, args.fspec, UIO_USERSPACE, NLC_FOLLOW); if (error == 0) error = nlookup(&nd); if (error == 0) error = cache_vref(&nd.nl_nch, nd.nl_cred, &devvp); nlookup_done(&nd); if (error) return (error); if (!vn_isdisk(devvp, &error)) { vrele(devvp); return (error); } /* * If mount by non-root, then verify that user has necessary * permissions on the device. */ if (cred->cr_uid != 0) { accessmode = VREAD; if ((mp->mnt_flag & MNT_RDONLY) == 0) accessmode |= VWRITE; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); error = VOP_ACCESS(devvp, accessmode, cred); if (error) { vput(devvp); return (error); } vn_unlock(devvp); } if ((mp->mnt_flag & MNT_UPDATE) == 0) { error = mountmsdosfs(devvp, mp, &args); #ifdef MSDOSFS_DEBUG /* only needed for the printf below */ pmp = VFSTOMSDOSFS(mp); #endif } else { if (devvp != pmp->pm_devvp) error = EINVAL; /* XXX needs translation */ else vrele(devvp); } if (error) { vrele(devvp); return (error); } error = update_mp(mp, &args); if (error) { msdosfs_unmount(mp, MNT_FORCE); return error; } copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size); bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size); msdosfs_statfs(mp, &mp->mnt_stat, cred); #ifdef MSDOSFS_DEBUG printf("msdosfs_mount(): mp %p, pmp %p, inusemap %p\n", mp, pmp, pmp->pm_inusemap); #endif return (0); } static int mountmsdosfs(struct vnode *devvp, struct mount *mp, struct msdosfs_args *argp) { struct msdosfsmount *pmp; struct buf *bp; cdev_t dev; #ifndef __DragonFly__ struct partinfo dpart; int bsize = 0, dtype = 0, tmp; #endif union bootsector *bsp; struct byte_bpb33 *b33; struct byte_bpb50 *b50; struct byte_bpb710 *b710; u_int8_t SecPerClust; u_long clusters; int ronly, error; /* * Disallow multiple mounts of the same device. * Disallow mounting of a device that is currently in use * Flush out any old buffers remaining from a previous use. */ error = vfs_mountedon(devvp); if (error) return (error); if (count_udev(devvp->v_udev) > 0) return (EBUSY); vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); error = vinvalbuf(devvp, V_SAVE, 0, 0); vn_unlock(devvp); if (error) return (error); ronly = (mp->mnt_flag & MNT_RDONLY) != 0; vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY); error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, FSCRED, NULL); vn_unlock(devvp); if (error) return (error); dev = devvp->v_rdev; bp = NULL; /* both used in error_exit */ pmp = NULL; #ifndef __DragonFly__ if (argp->flags & MSDOSFSMNT_GEMDOSFS) { /* * We need the disklabel to calculate the size of a FAT entry * later on. Also make sure the partition contains a filesystem * of type FS_MSDOS. This doesn't work for floppies, so we have * to check for them too. * * At least some parts of the msdos fs driver seem to assume * that the size of a disk block will always be 512 bytes. * Let's check it... */ error = VOP_IOCTL(devvp, DIOCGPART, (caddr_t)&dpart, FREAD); if (error) goto error_exit; tmp = dpart.part->p_fstype; dtype = dpart.disklab->d_type; bsize = dpart.disklab->d_secsize; if (bsize != 512 || (dtype!=DTYPE_FLOPPY && tmp!=FS_MSDOS)) { error = EINVAL; goto error_exit; } } #endif /* * Read the boot sector of the filesystem, and then check the * boot signature. If not a dos boot sector then error out. * * NOTE: 2048 is a maximum sector size in current... */ error = bread(devvp, 0, 2048, &bp); if (error) goto error_exit; bp->b_flags |= B_AGE; bsp = (union bootsector *)bp->b_data; b33 = (struct byte_bpb33 *)bsp->bs33.bsBPB; b50 = (struct byte_bpb50 *)bsp->bs50.bsBPB; b710 = (struct byte_bpb710 *)bsp->bs710.bsPBP; #ifndef __DragonFly__ if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) { #endif #ifndef MSDOSFS_NOCHECKSIG if (bsp->bs50.bsBootSectSig0 != BOOTSIG0 || bsp->bs50.bsBootSectSig1 != BOOTSIG1) { error = EINVAL; goto error_exit; } #endif #ifndef __DragonFly__ } #endif pmp = kmalloc(sizeof *pmp, M_MSDOSFSMNT, M_WAITOK); bzero((caddr_t)pmp, sizeof *pmp); pmp->pm_mountp = mp; /* * Compute several useful quantities from the bpb in the * bootsector. Copy in the dos 5 variant of the bpb then fix up * the fields that are different between dos 5 and dos 3.3. */ SecPerClust = b50->bpbSecPerClust; pmp->pm_BytesPerSec = getushort(b50->bpbBytesPerSec); pmp->pm_ResSectors = getushort(b50->bpbResSectors); pmp->pm_FATs = b50->bpbFATs; pmp->pm_RootDirEnts = getushort(b50->bpbRootDirEnts); pmp->pm_Sectors = getushort(b50->bpbSectors); pmp->pm_FATsecs = getushort(b50->bpbFATsecs); pmp->pm_SecPerTrack = getushort(b50->bpbSecPerTrack); pmp->pm_Heads = getushort(b50->bpbHeads); pmp->pm_Media = b50->bpbMedia; /* calculate the ratio of sector size to DEV_BSIZE */ pmp->pm_BlkPerSec = pmp->pm_BytesPerSec / DEV_BSIZE; #ifndef __DragonFly__ if (!(argp->flags & MSDOSFSMNT_GEMDOSFS)) { #endif /* XXX - We should probably check more values here */ if (!pmp->pm_BytesPerSec || !SecPerClust || !pmp->pm_Heads || !pmp->pm_SecPerTrack || pmp->pm_SecPerTrack > 63) { error = EINVAL; goto error_exit; } #ifndef __DragonFly__ } #endif if (pmp->pm_Sectors == 0) { pmp->pm_HiddenSects = getulong(b50->bpbHiddenSecs); pmp->pm_HugeSectors = getulong(b50->bpbHugeSectors); } else { pmp->pm_HiddenSects = getushort(b33->bpbHiddenSecs); pmp->pm_HugeSectors = pmp->pm_Sectors; } if (pmp->pm_RootDirEnts == 0) { if (bsp->bs710.bsBootSectSig2 != BOOTSIG2 || bsp->bs710.bsBootSectSig3 != BOOTSIG3 || pmp->pm_Sectors || pmp->pm_FATsecs || getushort(b710->bpbFSVers)) { error = EINVAL; printf("mountmsdosfs(): bad FAT32 filesystem\n"); goto error_exit; } pmp->pm_fatmask = FAT32_MASK; pmp->pm_fatmult = 4; pmp->pm_fatdiv = 1; pmp->pm_FATsecs = getulong(b710->bpbBigFATsecs); if (getushort(b710->bpbExtFlags) & FATMIRROR) pmp->pm_curfat = getushort(b710->bpbExtFlags) & FATNUM; else pmp->pm_flags |= MSDOSFS_FATMIRROR; } else pmp->pm_flags |= MSDOSFS_FATMIRROR; /* * Check a few values (could do some more): * - logical sector size: power of 2, >= block size * - sectors per cluster: power of 2, >= 1 * - number of sectors: >= 1, <= size of partition */ if ( (SecPerClust == 0) || (SecPerClust & (SecPerClust - 1)) || (pmp->pm_BytesPerSec < DEV_BSIZE) || (pmp->pm_BytesPerSec & (pmp->pm_BytesPerSec - 1)) || (pmp->pm_HugeSectors == 0) ) { error = EINVAL; goto error_exit; } pmp->pm_HugeSectors *= pmp->pm_BlkPerSec; pmp->pm_HiddenSects *= pmp->pm_BlkPerSec; /* XXX not used? */ pmp->pm_FATsecs *= pmp->pm_BlkPerSec; SecPerClust *= pmp->pm_BlkPerSec; pmp->pm_fatblk = pmp->pm_ResSectors * pmp->pm_BlkPerSec; if (FAT32(pmp)) { pmp->pm_rootdirblk = getulong(b710->bpbRootClust); pmp->pm_firstcluster = pmp->pm_fatblk + (pmp->pm_FATs * pmp->pm_FATsecs); pmp->pm_fsinfo = getushort(b710->bpbFSInfo) * pmp->pm_BlkPerSec; } else { pmp->pm_rootdirblk = pmp->pm_fatblk + (pmp->pm_FATs * pmp->pm_FATsecs); pmp->pm_rootdirsize = (pmp->pm_RootDirEnts * sizeof(struct direntry) + DEV_BSIZE - 1) / DEV_BSIZE; /* in blocks */ pmp->pm_firstcluster = pmp->pm_rootdirblk + pmp->pm_rootdirsize; } pmp->pm_maxcluster = (pmp->pm_HugeSectors - pmp->pm_firstcluster) / SecPerClust + 1; pmp->pm_fatsize = pmp->pm_FATsecs * DEV_BSIZE; /* XXX not used? */ #ifndef __DragonFly__ if (argp->flags & MSDOSFSMNT_GEMDOSFS) { if ((pmp->pm_maxcluster <= (0xff0 - 2)) && ((dtype == DTYPE_FLOPPY) || ((dtype == DTYPE_VNODE) && ((pmp->pm_Heads == 1) || (pmp->pm_Heads == 2)))) ) { pmp->pm_fatmask = FAT12_MASK; pmp->pm_fatmult = 3; pmp->pm_fatdiv = 2; } else { pmp->pm_fatmask = FAT16_MASK; pmp->pm_fatmult = 2; pmp->pm_fatdiv = 1; } } else #endif if (pmp->pm_fatmask == 0) { if (pmp->pm_maxcluster <= ((CLUST_RSRVD - CLUST_FIRST) & FAT12_MASK)) { /* * This will usually be a floppy disk. This size makes * sure that one fat entry will not be split across * multiple blocks. */ pmp->pm_fatmask = FAT12_MASK; pmp->pm_fatmult = 3; pmp->pm_fatdiv = 2; } else { pmp->pm_fatmask = FAT16_MASK; pmp->pm_fatmult = 2; pmp->pm_fatdiv = 1; } } clusters = (pmp->pm_fatsize / pmp->pm_fatmult) * pmp->pm_fatdiv; if (pmp->pm_maxcluster >= clusters) { printf("Warning: number of clusters (%ld) exceeds FAT " "capacity (%ld)\n", pmp->pm_maxcluster + 1, clusters); pmp->pm_maxcluster = clusters - 1; } if (FAT12(pmp)) pmp->pm_fatblocksize = 3 * pmp->pm_BytesPerSec; else pmp->pm_fatblocksize = MSDOSFS_DFLTBSIZE; pmp->pm_fatblocksec = pmp->pm_fatblocksize / DEV_BSIZE; pmp->pm_bnshift = DEV_BSHIFT; /* * Compute mask and shift value for isolating cluster relative byte * offsets and cluster numbers from a file offset. */ pmp->pm_bpcluster = SecPerClust * DEV_BSIZE; pmp->pm_crbomask = pmp->pm_bpcluster - 1; pmp->pm_cnshift = ffs(pmp->pm_bpcluster) - 1; /* * Check for valid cluster size * must be a power of 2 */ if (pmp->pm_bpcluster ^ (1 << pmp->pm_cnshift)) { error = EINVAL; goto error_exit; } /* * Release the bootsector buffer. */ brelse(bp); bp = NULL; /* * Check FSInfo. */ if (pmp->pm_fsinfo) { struct fsinfo *fp; if ((error = bread(devvp, de_bntodoff(pmp, pmp->pm_fsinfo), fsi_size(pmp), &bp)) != 0) goto error_exit; fp = (struct fsinfo *)bp->b_data; if (!bcmp(fp->fsisig1, "RRaA", 4) && !bcmp(fp->fsisig2, "rrAa", 4) && !bcmp(fp->fsisig3, "\0\0\125\252", 4) && !bcmp(fp->fsisig4, "\0\0\125\252", 4)) { pmp->pm_nxtfree = getulong(fp->fsinxtfree); if (pmp->pm_nxtfree == 0xffffffff) pmp->pm_nxtfree = CLUST_FIRST; } else pmp->pm_fsinfo = 0; brelse(bp); bp = NULL; } /* * Check and validate (or perhaps invalidate?) the fsinfo structure? */ if (pmp->pm_fsinfo && pmp->pm_nxtfree > pmp->pm_maxcluster) { printf( "Next free cluster in FSInfo (%lu) exceeds maxcluster (%lu)\n", pmp->pm_nxtfree, pmp->pm_maxcluster); error = EINVAL; goto error_exit; } /* * Allocate memory for the bitmap of allocated clusters, and then * fill it in. */ pmp->pm_inusemap = kmalloc(((pmp->pm_maxcluster + N_INUSEBITS - 1) / N_INUSEBITS) * sizeof(*pmp->pm_inusemap), M_MSDOSFSFAT, M_WAITOK); /* * fillinusemap() needs pm_devvp. */ pmp->pm_dev = dev; pmp->pm_devvp = devvp; /* * Have the inuse map filled in. */ if ((error = fillinusemap(pmp)) != 0) goto error_exit; /* * If they want fat updates to be synchronous then let them suffer * the performance degradation in exchange for the on disk copy of * the fat being correct just about all the time. I suppose this * would be a good thing to turn on if the kernel is still flakey. */ if (mp->mnt_flag & MNT_SYNCHRONOUS) pmp->pm_flags |= MSDOSFSMNT_WAITONFAT; /* * Finish up. */ if (ronly) pmp->pm_flags |= MSDOSFSMNT_RONLY; else pmp->pm_fmod = 1; mp->mnt_data = (qaddr_t) pmp; mp->mnt_stat.f_fsid.val[0] = dev2udev(dev); mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum; mp->mnt_flag |= MNT_LOCAL; vfs_add_vnodeops(mp, &msdosfs_vnode_vops, &mp->mnt_vn_norm_ops); dev->si_mountpoint = mp; return 0; error_exit: if (bp) brelse(bp); VOP_CLOSE(devvp, ronly ? FREAD : FREAD | FWRITE); if (pmp) { if (pmp->pm_inusemap) kfree(pmp->pm_inusemap, M_MSDOSFSFAT); kfree(pmp, M_MSDOSFSMNT); mp->mnt_data = (qaddr_t)0; } return (error); } /* * Unmount the filesystem described by mp. */ static int msdosfs_unmount(struct mount *mp, int mntflags) { struct msdosfsmount *pmp; int error, flags; flags = 0; if (mntflags & MNT_FORCE) flags |= FORCECLOSE; error = vflush(mp, 0, flags); if (error) return error; pmp = VFSTOMSDOSFS(mp); pmp->pm_devvp->v_rdev->si_mountpoint = NULL; #ifdef MSDOSFS_DEBUG { struct vnode *vp = pmp->pm_devvp; printf("msdosfs_umount(): just before calling VOP_CLOSE()\n"); printf("flag %08lx, usecount %d, writecount %d, holdcnt %ld\n", vp->v_flag, vp->v_usecount, vp->v_writecount, vp->v_holdcnt); printf("mount %p, op %p\n", vp->v_mount, vp->v_op); printf("freef %p, freeb %p, mount %p\n", TAILQ_NEXT(vp, v_freelist), TAILQ_PREV(vp, v_freelist), vp->v_mount); printf("cleanblkhd %p, dirtyblkhd %p, numoutput %ld, type %d\n", RB_EMPTY(&vp->v_rbclean_tree), RB_EMPTY(&vp->v_rbdirty_tree), vp->v_track_write.bk_active, vp->v_type); printf("union %p, tag %d, data[0] %08x, data[1] %08x\n", vp->v_socket, vp->v_tag, ((u_int *)vp->v_data)[0], ((u_int *)vp->v_data)[1]); } #endif error = VOP_CLOSE(pmp->pm_devvp, (pmp->pm_flags&MSDOSFSMNT_RONLY) ? FREAD : FREAD | FWRITE); vrele(pmp->pm_devvp); kfree(pmp->pm_inusemap, M_MSDOSFSFAT); kfree(pmp, M_MSDOSFSMNT); mp->mnt_data = (qaddr_t)0; mp->mnt_flag &= ~MNT_LOCAL; return (error); } static int msdosfs_root(struct mount *mp, struct vnode **vpp) { struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); struct denode *ndep; int error; #ifdef MSDOSFS_DEBUG printf("msdosfs_root(); mp %p, pmp %p\n", mp, pmp); #endif error = deget(pmp, MSDOSFSROOT, MSDOSFSROOT_OFS, &ndep); if (error) return (error); *vpp = DETOV(ndep); return (0); } static int msdosfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) { struct msdosfsmount *pmp; pmp = VFSTOMSDOSFS(mp); sbp->f_bsize = pmp->pm_bpcluster; sbp->f_iosize = pmp->pm_bpcluster; sbp->f_blocks = pmp->pm_maxcluster + 1; sbp->f_bfree = pmp->pm_freeclustercount; sbp->f_bavail = pmp->pm_freeclustercount; sbp->f_files = pmp->pm_RootDirEnts; /* XXX */ sbp->f_ffree = 0; /* what to put in here? */ if (sbp != &mp->mnt_stat) { sbp->f_type = mp->mnt_vfc->vfc_typenum; bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); } strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN); return (0); } struct scaninfo { int rescan; int allerror; int waitfor; }; static int msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data); static int msdosfs_sync(struct mount *mp, int waitfor) { struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); struct scaninfo scaninfo; int error; /* * If we ever switch to not updating all of the fats all the time, * this would be the place to update them from the first one. */ if (pmp->pm_fmod != 0) { if (pmp->pm_flags & MSDOSFSMNT_RONLY) panic("msdosfs_sync: rofs mod"); else { /* update fats here */ } } /* * Write back each (modified) denode. */ scaninfo.allerror = 0; scaninfo.rescan = 1; while (scaninfo.rescan) { scaninfo.rescan = 0; vmntvnodescan(mp, VMSC_GETVP|VMSC_NOWAIT, NULL, msdosfs_sync_scan, &scaninfo); } /* * Flush filesystem control info. */ if (waitfor != MNT_LAZY) { vn_lock(pmp->pm_devvp, LK_EXCLUSIVE | LK_RETRY); if ((error = VOP_FSYNC(pmp->pm_devvp, waitfor)) != 0) scaninfo.allerror = error; vn_unlock(pmp->pm_devvp); } return (scaninfo.allerror); } static int msdosfs_sync_scan(struct mount *mp, struct vnode *vp, void *data) { struct scaninfo *info = data; struct denode *dep; int error; dep = VTODE(vp); if (vp->v_type == VNON || ((dep->de_flag & (DE_ACCESS | DE_CREATE | DE_UPDATE | DE_MODIFIED)) == 0 && (RB_EMPTY(&vp->v_rbdirty_tree) || info->waitfor == MNT_LAZY))) { return(0); } if ((error = VOP_FSYNC(vp, info->waitfor)) != 0) info->allerror = error; return(0); } static int msdosfs_fhtovp(struct mount *mp, struct fid *fhp, struct vnode **vpp) { struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); struct defid *defhp = (struct defid *) fhp; struct denode *dep; int error; error = deget(pmp, defhp->defid_dirclust, defhp->defid_dirofs, &dep); if (error) { *vpp = NULLVP; return (error); } *vpp = DETOV(dep); return (0); } static int msdosfs_checkexp(struct mount *mp, struct sockaddr *nam, int *exflagsp, struct ucred **credanonp) { struct msdosfsmount *pmp = VFSTOMSDOSFS(mp); struct netcred *np; np = vfs_export_lookup(mp, &pmp->pm_export, nam); if (np == NULL) return (EACCES); *exflagsp = np->netc_exflags; *credanonp = &np->netc_anon; return (0); } static int msdosfs_vptofh(struct vnode *vp, struct fid *fhp) { struct denode *dep; struct defid *defhp; dep = VTODE(vp); defhp = (struct defid *)fhp; defhp->defid_len = sizeof(struct defid); defhp->defid_dirclust = dep->de_dirclust; defhp->defid_dirofs = dep->de_diroffset; /* defhp->defid_gen = dep->de_gen; */ return (0); } static struct vfsops msdosfs_vfsops = { .vfs_mount = msdosfs_mount, .vfs_unmount = msdosfs_unmount, .vfs_root = msdosfs_root, .vfs_statfs = msdosfs_statfs, .vfs_sync = msdosfs_sync, .vfs_fhtovp = msdosfs_fhtovp, .vfs_checkexp = msdosfs_checkexp, .vfs_vptofh = msdosfs_vptofh, .vfs_init = msdosfs_init, .vfs_uninit = msdosfs_uninit }; VFS_SET(msdosfs_vfsops, msdos, 0);