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authordfr <dfr@FreeBSD.org>1994-09-19 15:41:57 +0000
committerdfr <dfr@FreeBSD.org>1994-09-19 15:41:57 +0000
commit7efbb964fdff1348e01bdcd7d4bb59551c389bef (patch)
tree4ee90f451b7756bcd74bbc0c7e0ef0219507ff02 /sys/msdosfs/msdosfsmount.h
parent7a224749be53b3a6bdb826ffbd93208f0b757586 (diff)
downloadFreeBSD-src-7efbb964fdff1348e01bdcd7d4bb59551c389bef.zip
FreeBSD-src-7efbb964fdff1348e01bdcd7d4bb59551c389bef.tar.gz
Added msdosfs.
Obtained from: NetBSD
Diffstat (limited to 'sys/msdosfs/msdosfsmount.h')
-rw-r--r--sys/msdosfs/msdosfsmount.h183
1 files changed, 183 insertions, 0 deletions
diff --git a/sys/msdosfs/msdosfsmount.h b/sys/msdosfs/msdosfsmount.h
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+/* $Id$ */
+/* $NetBSD: msdosfsmount.h,v 1.7 1994/08/21 18:44:17 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_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_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_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_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 */
+};
+
+/* 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.
+ */
+#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_depclust) * (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_depclust)
+
+
+/*
+ * 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(());
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