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Diffstat (limited to 'sys/msdosfs/msdosfsmount.h')
| -rw-r--r-- | sys/msdosfs/msdosfsmount.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/sys/msdosfs/msdosfsmount.h b/sys/msdosfs/msdosfsmount.h new file mode 100644 index 00000000000..2267f685b94 --- /dev/null +++ b/sys/msdosfs/msdosfsmount.h @@ -0,0 +1,167 @@ +/* $NetBSD: msdosfsmount.h,v 1.11 1995/09/09 19:38:12 ws Exp $ */ + +/*- + * Copyright (C) 1994 Wolfgang Solfrank. + * Copyright (C) 1994 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 + */ + +/* + * Layout of the mount control block for a msdos file system. + */ +struct msdosfsmount { + struct mount *pm_mountp;/* vfs mount struct for this fs */ + dev_t pm_dev; /* block special device mounted */ + uid_t pm_uid; /* uid to set as owner of the files */ + gid_t pm_gid; /* gid to set as owner of the files */ + mode_t pm_mask; /* mask to and with file protection bits */ + struct vnode *pm_devvp; /* vnode for block device mntd */ + struct bpb50 pm_bpb; /* BIOS parameter blk for this fs */ + u_long pm_fatblk; /* block # of first FAT */ + u_long pm_rootdirblk; /* block # of root directory */ + u_long pm_rootdirsize; /* size in blocks (not clusters) */ + u_long pm_firstcluster; /* block number of first cluster */ + u_long pm_nmbrofclusters; /* # of clusters in filesystem */ + u_long pm_maxcluster; /* maximum cluster number */ + u_long pm_freeclustercount; /* number of free clusters */ + u_long pm_bnshift; /* shift file offset right this amount to get a block number */ + u_long pm_brbomask; /* and a file offset with this mask to get block rel offset */ + u_long pm_cnshift; /* shift file offset right this amount to get a cluster number */ + u_long pm_crbomask; /* and a file offset with this mask to get cluster rel offset */ + u_long pm_bpcluster; /* bytes per cluster */ + u_long pm_fmod; /* ~0 if fs is modified, this can rollover to 0 */ + u_long pm_fatblocksize; /* size of fat blocks in bytes */ + u_long pm_fatblocksec; /* size of fat blocks in sectors */ + u_long pm_fatsize; /* size of fat in bytes */ + u_int *pm_inusemap; /* ptr to bitmap of in-use clusters */ + char pm_ronly; /* read only if non-zero */ + char pm_waitonfat; /* wait for writes of the fat to complt, when 0 use bdwrite, else use bwrite */ + struct netexport pm_export; /* export information */ +#ifdef atari + u_int pm_fatentrysize; /* size of fat entry (12/16) */ +#endif /* atari */ +}; + +#define VFSTOMSDOSFS(mp) ((struct msdosfsmount *)mp->mnt_data) + +/* Number of bits in one pm_inusemap item: */ +#define N_INUSEBITS (8 * sizeof(u_int)) + +/* + * Shorthand for fields in the bpb contained in the msdosfsmount structure. + */ +#define pm_BytesPerSec pm_bpb.bpbBytesPerSec +#define pm_SectPerClust pm_bpb.bpbSecPerClust +#define pm_ResSectors pm_bpb.bpbResSectors +#define pm_FATs pm_bpb.bpbFATs +#define pm_RootDirEnts pm_bpb.bpbRootDirEnts +#define pm_Sectors pm_bpb.bpbSectors +#define pm_Media pm_bpb.bpbMedia +#define pm_FATsecs pm_bpb.bpbFATsecs +#define pm_SecPerTrack pm_bpb.bpbSecPerTrack +#define pm_Heads pm_bpb.bpbHeads +#define pm_HiddenSects pm_bpb.bpbHiddenSecs +#define pm_HugeSectors pm_bpb.bpbHugeSectors + +/* + * Map a cluster number into a filesystem relative block number. + */ +#define cntobn(pmp, cn) \ + ((((cn)-CLUST_FIRST) * (pmp)->pm_SectPerClust) + (pmp)->pm_firstcluster) + +/* + * Map a filesystem relative block number back into a cluster number. + */ +#define bntocn(pmp, bn) \ + ((((bn) - pmp->pm_firstcluster) / (pmp)->pm_SectPerClust) + CLUST_FIRST) + +/* + * Calculate block number for directory entry in root dir, offset dirofs + */ +#define roottobn(pmp, dirofs) \ + (((dirofs) / (pmp)->pm_bpcluster) * (pmp)->pm_SectPerClust \ + + (pmp)->pm_rootdirblk) + +/* + * Calculate block number for directory entry at cluster dirclu, offset + * dirofs + */ +#define detobn(pmp, dirclu, dirofs) \ + ((dirclu) == MSDOSFSROOT \ + ? roottobn((pmp), (dirofs)) \ + : cntobn((pmp), (dirclu))) + +/* + * Convert pointer to buffer -> pointer to direntry + */ +#define bptoep(pmp, bp, dirofs) \ + ((struct direntry *)(((bp)->b_data) \ + + ((dirofs) & (pmp)->pm_crbomask))) + + +/* + * Convert filesize to block number + */ +#define de_blk(pmp, off) \ + ((off) >> (pmp)->pm_cnshift) + +/* + * Clusters required to hold size bytes + */ +#define de_clcount(pmp, size) \ + (((size) + (pmp)->pm_bpcluster - 1) >> (pmp)->pm_cnshift) + +/* + * Prototypes for MSDOSFS virtual filesystem operations + */ +int msdosfs_mount __P((struct mount *, char *, caddr_t, struct nameidata *, struct proc *)); +int msdosfs_start __P((struct mount *, int, struct proc *)); +int msdosfs_unmount __P((struct mount *, int, struct proc *)); +int msdosfs_root __P((struct mount *, struct vnode **)); +int msdosfs_quotactl __P((struct mount *, int, uid_t, caddr_t, struct proc *)); +int msdosfs_statfs __P((struct mount *, struct statfs *, struct proc *)); +int msdosfs_sync __P((struct mount *, int, struct ucred *, struct proc *)); +int msdosfs_fhtovp __P((struct mount *, struct fid *, struct mbuf *, struct vnode **, int *, struct ucred **)); +int msdosfs_vptofh __P((struct vnode *, struct fid *)); +int msdosfs_init __P(()); |