Add a new, trivial file system, pcifs, which shows the devices on a
pcibus (via pcictl(8)) under the mount point: % df /mnt Filesystem 1K-blocks Used Avail Capacity Mounted on puffs:refuse:pcifs 0 0 0 100% /mnt % l /mnt total 642 drwxr-xr-x 2 root wheel 0 Jan 1 1970 . drwxr-xr-x 31 root wheel 1024 May 16 20:06 .. lrw-r--r-- 1 agc agc 65 May 16 22:05 000:00:0: -> Intel 82443BX Host Bridge/Controller (host bridge, revision 0x01) lrw-r--r-- 1 agc agc 55 May 16 22:05 000:01:0: -> Intel 82443BX AGP Interface (PCI bridge, revision 0x01) lrw-r--r-- 1 agc agc 64 May 16 22:05 000:07:0: -> Intel 82371AB (PIIX4) PCI-ISA Bridge (ISA bridge, revision 0x08) lrw-r--r-- 1 agc agc 86 May 16 22:05 000:07:1: -> Intel 82371AB (PIIX4) IDE controller (IDE mass storage, interface 0x8a, revision 0x01) lrw-r--r-- 1 agc agc 58 May 16 22:05 000:07:2: -> Intel 82371AB (PIIX4) USB Host Controller (USB serial bus) lrw-r--r-- 1 agc agc 87 May 16 22:05 000:07:3: -> Intel 82371AB (PIIX4) Power Management Controller (miscellaneous bridge, revision 0x08) lrw-r--r-- 1 agc agc 36 May 16 22:05 000:15:0: -> VMware Virtual SVGA II (VGA display) lrw-r--r-- 1 agc agc 56 May 16 22:05 000:16:0: -> Symbios Logic 53c1030 (SCSI mass storage, revision 0x01) lrw-r--r-- 1 agc agc 75 May 16 22:05 000:17:0: -> Advanced Micro Devices PCnet-PCI Ethernet (ethernet network, revision 0x10) lrw-r--r-- 1 agc agc 53 May 16 22:05 000:18:0: -> Ensoniq AudioPCI 97 (audio multimedia, revision 0x02) % pcifs uses the virtdir routines, librefuse and puffs.
This commit is contained in:
agc
parent
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12
share/examples/refuse/pcifs/Makefile
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12
share/examples/refuse/pcifs/Makefile
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# $NetBSD: Makefile,v 1.1 2007/05/16 21:44:30 agc Exp $
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PROG=pcifs
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SRCS=pcifs.c virtdir.c
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LDADD+= -lrefuse
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CPPFLAGS+= -g -I${.CURDIR}/../virtdir
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MAN=pcifs.8
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WARNS=4
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.PATH: ${.CURDIR}/../virtdir
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.include <bsd.prog.mk>
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85
share/examples/refuse/pcifs/pcifs.8
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85
share/examples/refuse/pcifs/pcifs.8
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.\"
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.\" Copyright © 2007 Alistair Crooks. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote
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.\" products derived from this software without specific prior written
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.\" permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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.\" OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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.\" GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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.\" NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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.\" SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd May 16, 2007
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.Dt PCIFS 8
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.Os
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.Sh NAME
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.Nm pcifs
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.Nd refuse-based virtual file system to display devices on PCI bus
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.Sh SYNOPSIS
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.Nm
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.Op Fl b Ar bus
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.Op Fl v
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.Ar mount_point
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.Sh DESCRIPTION
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The
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.Nm
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utility can be used to mount a virtual file system which
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under the
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mount point, showing the layout
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of devices on the PCI bus.
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.Pp
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The following arguments can be used:
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.Bl -tag -width Ds
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.It Fl v
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Produce verbose output
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.It Fl b Ar bus
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Use the numeric bus number from the argument for
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the PCI bus number to list.
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.El
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.Pp
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The
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.Nm
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utility makes use of the
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.Xr virtdir 3
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virtual directory routines.
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.Pp
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The
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.Xr refuse 3
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library is used to provide the file system features.
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.Pp
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The mandatory parameter is
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the local mount
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point.
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.Pp
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The
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.Xr pcictl 8
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utility is used to retrieve the information on
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PCI devices.
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.Sh SEE ALSO
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.Xr librefuse 3 ,
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.Xr puffs 3 ,
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.Xr virtdir 3 ,
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.Xr pcictl 8 .
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Nx 5.0 .
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.Sh AUTHORS
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.An Alistair Crooks Aq agc@NetBSD.org
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203
share/examples/refuse/pcifs/pcifs.c
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203
share/examples/refuse/pcifs/pcifs.c
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/*
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* Copyright © 2007 Alistair Crooks. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fuse.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "virtdir.h"
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#include "defs.h"
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static int verbose; /* how chatty are we? */
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static virtdir_t pci;
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/* perform the stat operation */
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/* if this is the root, then just synthesise the data */
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/* otherwise, retrieve the data, and be sure to fill in the size */
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static int
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pcifs_getattr(const char *path, struct stat *st)
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{
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virt_dirent_t *ep;
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if (strcmp(path, "/") == 0) {
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(void) memset(st, 0x0, sizeof(*st));
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st->st_mode = S_IFDIR | 0755;
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st->st_nlink = 2;
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return 0;
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}
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if ((ep = virtdir_find(&pci, path, strlen(path))) == NULL) {
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return -ENOENT;
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}
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switch(ep->type) {
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case 'f':
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break;
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case 'd':
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(void) memcpy(st, &pci.dir, sizeof(*st));
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break;
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case 'l':
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(void) memcpy(st, &pci.lnk, sizeof(*st));
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st->st_size = ep->tgtlen;
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st->st_mode = S_IFLNK | 0644;
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break;
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}
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return 0;
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}
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/* readdir operation */
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static int
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pcifs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
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off_t offset, struct fuse_file_info * fi)
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{
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virt_dirent_t *dp;
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VIRTDIR *dirp;
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if ((dirp = openvirtdir(&pci, path)) == NULL) {
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return 0;
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}
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filler(buf, ".", NULL, 0);
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filler(buf, "..", NULL, 0);
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while ((dp = readvirtdir(dirp)) != NULL) {
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filler(buf, dp->d_name, NULL, 0);
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}
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closevirtdir(dirp);
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return 0;
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}
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/* open the file in the file system */
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static int
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pcifs_open(const char *path, struct fuse_file_info * fi)
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{
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return 0;
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}
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/* read the file's contents in the file system */
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static int
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pcifs_read(const char *path, char *buf, size_t size, off_t offset,
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struct fuse_file_info * fi)
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{
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return 0;
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}
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/* fill in the statvfs struct */
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static int
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pcifs_statfs(const char *path, struct statvfs *st)
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{
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(void) memset(st, 0x0, sizeof(*st));
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return 0;
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}
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/* read the symbolic link */
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static int
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pcifs_readlink(const char *path, char *buf, size_t size)
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{
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virt_dirent_t *ep;
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if ((ep = virtdir_find(&pci, path, strlen(path))) == NULL) {
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return -ENOENT;
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}
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if (ep->tgt == NULL) {
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return -ENOENT;
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}
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(void) strlcpy(buf, ep->tgt, size);
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return 0;
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}
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/* operations struct */
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static struct fuse_operations pcifs_oper = {
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.getattr = pcifs_getattr,
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.readlink = pcifs_readlink,
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.readdir = pcifs_readdir,
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.open = pcifs_open,
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.read = pcifs_read,
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.statfs = pcifs_statfs
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};
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/* build up a fuse_tree from the information in the database */
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static int
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build_tree(virtdir_t *tp, int bus)
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{
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struct stat dir;
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struct stat f;
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FILE *pp;
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char name[MAXPATHLEN];
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char buf[BUFSIZ];
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char *cp;
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int cc;
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(void) stat(".", &dir);
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(void) memcpy(&f, &dir, sizeof(f));
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(void) snprintf(buf, sizeof(buf), "pcictl pci%d list", bus);
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f.st_mode = S_IFREG | 0644;
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if ((pp = popen(buf, "r")) == NULL) {
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return 0;
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}
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while (fgets(buf, sizeof(buf), pp) != NULL) {
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buf[strlen(buf) - 1] = 0x0;
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if ((cp = strchr(buf, ' ')) == NULL) {
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continue;
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}
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cc = snprintf(name, sizeof(name), "/%.*s", (int)(cp - buf), buf);
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virtdir_add(tp, name, cc, 'l', cp + 1);
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if (verbose) {
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printf("pcifs: adding symbolic link `%s' -> `%s'\n", name, cp + 1);
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}
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}
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(void) pclose(pp);
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return 1;
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}
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int
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main(int argc, char **argv)
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{
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int bus;
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int i;
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bus = 0;
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while ((i = getopt(argc, argv, "b:v")) != -1) {
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switch(i) {
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case 'b':
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bus = atoi(optarg);
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break;
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case 'v':
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verbose += 1;
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break;
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}
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}
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if (!build_tree(&pci, bus)) {
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exit(EXIT_FAILURE);
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}
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return fuse_main(argc, argv, &pcifs_oper, NULL);
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}
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