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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37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include <sys/param.h>
43 #include <sys/vnode.h>
45 #include <netinet/in.h>
48 #include <sys/mount.h>
49 #include <fs/msdosfs/bpb.h>
50 #include <fs/msdosfs/msdosfsmount.h>
53 #include <fs/msdosfs/denode.h>
54 #include <fs/msdosfs/direntry.h>
55 #include <fs/msdosfs/fat.h>
64 * VTODE is defined in denode.h only if _KERNEL is defined, but that leads to
67 #define VTODE(vp) ((struct denode *)getvnodedata(vp))
69 #include "libprocstat.h"
70 #include "common_kvm.h"
73 struct dosmount *next;
74 struct msdosfsmount *kptr; /* Pointer in kernel space */
75 struct msdosfsmount data; /* User space copy of structure */
79 msdosfs_filestat(kvm_t *kd, struct vnode *vp, struct vnstat *vn)
82 static struct dosmount *mounts;
87 if (!kvm_read_all(kd, (unsigned long)VTODE(vp), &denode,
89 warnx("can't read denode at %p", (void *)VTODE(vp));
94 * Find msdosfsmount structure for the vnode's filesystem. Needed
95 * for some filesystem parameters
97 for (mnt = mounts; mnt; mnt = mnt->next)
98 if (mnt->kptr == denode.de_pmp)
102 if ((mnt = malloc(sizeof(struct dosmount))) == NULL) {
106 if (!kvm_read_all(kd, (unsigned long)denode.de_pmp,
107 &mnt->data, sizeof(mnt->data))) {
109 warnx("can't read mount info at %p",
110 (void *)denode.de_pmp);
115 mnt->kptr = denode.de_pmp;
118 vn->vn_fsid = dev2udev(kd, mnt->data.pm_dev);
120 vn->vn_mode |= denode.de_Attributes & ATTR_READONLY ? 0 : 0222;
121 vn->vn_mode &= mnt->data.pm_mask;
123 /* Distinguish directories and files. No "special" files in FAT. */
124 vn->vn_mode |= denode.de_Attributes & ATTR_DIRECTORY ? S_IFDIR : S_IFREG;
125 vn->vn_size = denode.de_FileSize;
129 * Culled from msdosfs_vnops.c. There appears to be a problem
130 * here, in that a directory has the same inode number as the first
131 * file in the directory. stat(2) suffers from this problem also, so
132 * I won't try to fix it here.
134 * The following computation of the fileid must be the same as that
135 * used in msdosfs_readdir() to compute d_fileno. If not, pwd
138 dirsperblk = mnt->data.pm_BytesPerSec / sizeof(struct direntry);
139 if (denode.de_Attributes & ATTR_DIRECTORY) {
140 fileid = cntobn(&mnt->data, denode.de_StartCluster)
142 if (denode.de_StartCluster == MSDOSFSROOT)
145 fileid = cntobn(&mnt->data, denode.de_dirclust) * dirsperblk;
146 if (denode.de_dirclust == MSDOSFSROOT)
147 fileid = roottobn(&mnt->data, 0) * dirsperblk;
148 fileid += denode.de_diroffset / sizeof(struct direntry);
151 vn->vn_fileid = fileid;