diff options
Diffstat (limited to 'sys/fs/msdosfs/msdosfsmount.h')
| -rw-r--r-- | sys/fs/msdosfs/msdosfsmount.h | 145 |
1 files changed, 88 insertions, 57 deletions
diff --git a/sys/fs/msdosfs/msdosfsmount.h b/sys/fs/msdosfs/msdosfsmount.h index 49a9327..3a0ee6e 100644 --- a/sys/fs/msdosfs/msdosfsmount.h +++ b/sys/fs/msdosfs/msdosfsmount.h @@ -1,9 +1,9 @@ -/* $Id: msdosfsmount.h,v 1.11 1997/03/03 17:36:11 bde Exp $ */ -/* $NetBSD: msdosfsmount.h,v 1.7 1994/08/21 18:44:17 ws Exp $ */ +/* $Id: msdosfsmount.h,v 1.12 1997/10/12 20:25:02 phk Exp $ */ +/* $NetBSD: msdosfsmount.h,v 1.17 1997/11/17 15:37:07 ws Exp $ */ /*- - * Copyright (C) 1994 Wolfgang Solfrank. - * Copyright (C) 1994 TooLs GmbH. + * 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). * @@ -63,121 +63,131 @@ MALLOC_DECLARE(M_MSDOSFSMNT); struct msdosfsmount { struct mount *pm_mountp;/* vfs mount struct for this fs */ dev_t pm_dev; /* block special device mounted */ - uid_t pm_mounter; /* uid of the user who mounted the FS */ 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_FATsecs; /* actual number of fat sectors */ u_long pm_fatblk; /* block # of first FAT */ - u_long pm_rootdirblk; /* block # of root directory */ + u_long pm_rootdirblk; /* block # (cluster # for FAT32) of root directory number */ 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_bnshift; /* shift file offset right this amount to get a block number */ u_long pm_bpcluster; /* bytes per cluster */ - u_long pm_depclust; /* directory entries 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_long pm_fatmask; /* mask to use for fat numbers */ + u_long pm_fsinfo; /* fsinfo block number */ + u_long pm_nxtfree; /* next free cluster in fsinfo block */ + u_int pm_fatmult; /* these 2 values are used in fat */ + u_int pm_fatdiv; /* offset computation */ + u_int pm_curfat; /* current fat for FAT32 (0 otherwise) */ 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 complete, when 0 use bdwrite, else use bwrite */ + u_int pm_flags; /* see below */ struct netexport pm_export; /* export information */ }; +/* Byte offset in FAT on filesystem pmp, cluster cn */ +#define FATOFS(pmp, cn) ((cn) * (pmp)->pm_fatmult / (pmp)->pm_fatdiv) + + +#define VFSTOMSDOSFS(mp) ((struct msdosfsmount *)mp->mnt_data) /* Number of bits in one pm_inusemap item: */ #define N_INUSEBITS (8 * sizeof(u_int)) /* - * How to compute pm_cnshift and pm_crbomask. - * - * pm_crbomask = (pm_SectPerClust * pm_BytesPerSect) - 1 - * if (bytesperclust == * 0) - * return EBADBLKSZ; - * bit = 1; - * for (i = 0; i < 32; i++) { - * if (bit & bytesperclust) { - * if (bit ^ bytesperclust) - * return EBADBLKSZ; - * pm_cnshift = * i; - * break; - * } - * bit <<= 1; - * } - */ - -/* * 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. + * Convert pointer to buffer -> pointer to direntry */ -#define cntobn(pmp, cn) \ - ((((cn)-CLUST_FIRST) * (pmp)->pm_SectPerClust) + (pmp)->pm_firstcluster) +#define bptoep(pmp, bp, dirofs) \ + ((struct direntry *)(((bp)->b_data) \ + + ((dirofs) & (pmp)->pm_crbomask))) /* - * Map a filesystem relative block number back into a cluster number. + * Convert block number to cluster number */ -#define bntocn(pmp, bn) \ - ((((bn) - pmp->pm_firstcluster)/ (pmp)->pm_SectPerClust) + CLUST_FIRST) +#define de_bn2cn(pmp, bn) \ + ((bn) >> ((pmp)->pm_cnshift - (pmp)->pm_bnshift)) /* - * Calculate block number for directory entry in root dir, offset dirofs + * Convert cluster number to block number */ -#define roottobn(pmp, dirofs) \ - (((dirofs) / (pmp)->pm_depclust) * (pmp)->pm_SectPerClust \ - + (pmp)->pm_rootdirblk) +#define de_cn2bn(pmp, cn) \ + ((cn) << ((pmp)->pm_cnshift - (pmp)->pm_bnshift)) /* - * Calculate block number for directory entry at cluster dirclu, offset - * dirofs + * Convert file offset to cluster number */ -#define detobn(pmp, dirclu, dirofs) \ - ((dirclu) == MSDOSFSROOT \ - ? roottobn((pmp), (dirofs)) \ - : cntobn((pmp), (dirclu))) +#define de_cluster(pmp, off) \ + ((off) >> (pmp)->pm_cnshift) /* - * Convert pointer to buffer -> pointer to direntry + * Clusters required to hold size bytes */ -#define bptoep(pmp, bp, dirofs) \ - ((struct direntry *)((bp)->b_data) \ - + (dirofs) % (pmp)->pm_depclust) - +#define de_clcount(pmp, size) \ + (((size) + (pmp)->pm_bpcluster - 1) >> (pmp)->pm_cnshift) /* - * Convert filesize to block number + * Convert file offset to block number */ #define de_blk(pmp, off) \ - ((off) >> (pmp)->pm_cnshift) + (de_cn2bn(pmp, de_cluster((pmp), (off)))) /* - * Clusters required to hold size bytes + * Convert cluster number to file offset */ -#define de_clcount(pmp, size) \ - (((size) + (pmp)->pm_bpcluster - 1) >> (pmp)->pm_cnshift) +#define de_cn2off(pmp, cn) \ + ((cn) << (pmp)->pm_cnshift) + +/* + * Convert block number to file offset + */ +#define de_bn2off(pmp, bn) \ + ((bn) << (pmp)->pm_bnshift) +/* + * Map a cluster number into a filesystem relative block number. + */ +#define cntobn(pmp, cn) \ + (de_cn2bn((pmp), (cn)-CLUST_FIRST) + (pmp)->pm_firstcluster) + +/* + * Calculate block number for directory entry in root dir, offset dirofs + */ +#define roottobn(pmp, dirofs) \ + (de_blk((pmp), (dirofs)) + (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))) int msdosfs_init __P((struct vfsconf *vfsp)); +int msdosfs_mountroot __P((void)); #endif /* KERNEL */ @@ -190,6 +200,27 @@ struct msdosfs_args { uid_t uid; /* uid that owns msdosfs files */ gid_t gid; /* gid that owns msdosfs files */ mode_t mask; /* mask to be applied for msdosfs perms */ + int flags; /* see below */ + int magic; /* version number */ }; +/* + * Msdosfs mount options: + */ +#define MSDOSFSMNT_SHORTNAME 1 /* Force old DOS short names only */ +#define MSDOSFSMNT_LONGNAME 2 /* Force Win'95 long names */ +#define MSDOSFSMNT_NOWIN95 4 /* Completely ignore Win95 entries */ +#ifndef __FreeBSD__ +#define MSDOSFSMNT_GEMDOSFS 8 /* This is a gemdos-flavour */ +#endif +/* All flags above: */ +#define MSDOSFSMNT_MNTOPT \ + (MSDOSFSMNT_SHORTNAME|MSDOSFSMNT_LONGNAME|MSDOSFSMNT_NOWIN95 \ + /*|MSDOSFSMNT_GEMDOSFS*/) +#define MSDOSFSMNT_RONLY 0x80000000 /* mounted read-only */ +#define MSDOSFSMNT_WAITONFAT 0x40000000 /* mounted synchronous */ +#define MSDOSFS_FATMIRROR 0x20000000 /* FAT is mirrored */ + +#define MSDOSFS_ARGSMAGIC 0xe4eff300 + #endif /* !_MSDOSFS_MSDOSFSMOUNT_H_ */ |
