Added msdosfs.

Obtained from: NetBSD

1 files changed, 183 insertions, 0 deletions

diff --git a/sys/fs/msdosfs/msdosfsmount.h b/sys/fs/msdosfs/msdosfsmount.h
new file mode 100644
index 0000000..62853c5
--- /dev/null
+++ b/sys/fs/msdosfs/msdosfsmount.h
@@ -0,0 +1,183 @@
+/*	$Id$ */
+/*	$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(());