2 * Copyright (c) 2000 Peter Edwards
3 * Copyright (c) 1988, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by Peter Edwards
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
43 #include <sys/vnode.h>
46 #include <sys/mount.h>
47 #include <fs/msdosfs/bpb.h>
48 #include <fs/msdosfs/msdosfsmount.h>
51 #include <fs/msdosfs/denode.h>
52 #include <fs/msdosfs/direntry.h>
53 #include <fs/msdosfs/fat.h>
62 * VTODE is defined in denode.h only if _KERNEL is defined, but that leads to
65 #define VTODE(vp) ((struct denode *)(vp)->v_data)
70 struct dosmount *next;
71 struct msdosfsmount *kptr; /* Pointer in kernel space */
72 struct msdosfsmount data; /* User space copy of structure */
76 msdosfs_filestat(vp, fsp)
81 static struct dosmount *mounts;
86 if (!KVM_READ(VTODE(vp), &denode, sizeof (denode))) {
87 dprintf(stderr, "can't read denode at %p for pid %d\n",
88 (void *)VTODE(vp), Pid);
93 * Find msdosfsmount structure for the vnode's filesystem. Needed
94 * for some filesystem parameters
96 for (mnt = mounts; mnt; mnt = mnt->next)
97 if (mnt->kptr == denode.de_pmp)
101 if ((mnt = malloc(sizeof(struct dosmount))) == NULL)
103 if (!KVM_READ(denode.de_pmp, &mnt->data, sizeof mnt->data)) {
106 "can't read mount info at %p for pid %d\n",
107 (void *)denode.de_pmp, Pid);
112 mnt->kptr = denode.de_pmp;
115 fsp->fsid = dev2udev(denode.de_dev);
117 fsp->mode |= denode.de_Attributes & ATTR_READONLY ? 0 : 0222;
118 fsp->mode &= mnt->data.pm_mask;
120 /* Distinguish directories and files. No "special" files in FAT. */
121 fsp->mode |= denode.de_Attributes & ATTR_DIRECTORY ? S_IFDIR : S_IFREG;
123 fsp->size = denode.de_FileSize;
128 * Culled from msdosfs_vnops.c. There appears to be a problem
129 * here, in that a directory has the same inode number as the first
130 * file in the directory. stat(2) suffers from this problem also, so
131 * I won't try to fix it here.
133 * The following computation of the fileid must be the same as that
134 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
137 dirsperblk = mnt->data.pm_BytesPerSec / sizeof(struct direntry);
138 if (denode.de_Attributes & ATTR_DIRECTORY) {
139 fileid = cntobn(&mnt->data, denode.de_StartCluster)
141 if (denode.de_StartCluster == MSDOSFSROOT)
144 fileid = cntobn(&mnt->data, denode.de_dirclust) * dirsperblk;
145 if (denode.de_dirclust == MSDOSFSROOT)
146 fileid = roottobn(&mnt->data, 0) * dirsperblk;
147 fileid += denode.de_diroffset / sizeof(struct direntry);
150 fsp->fileid = fileid;