/* * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan * (Royal Institute of Technology, Stockholm, Sweden). * All rights reserved. * * 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 the Kungliga Tekniska * Högskolan and its contributors. * * 4. Neither the name of the Institute nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 THE INSTITUTE OR CONTRIBUTORS 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. */ #include #include #include #include #include #include RCSID("$Id: xfs_dev-bsd.c,v 1.3 2000/09/11 14:26:51 art Exp $"); int xfs_devopen(dev_t dev, int flag, int devtype, struct proc *proc) { XFSDEB(XDEBDEV, ("xfsopen dev = %d.%d, flag = %d, devtype = %d\n", major(dev), minor(dev), flag, devtype)); return xfs_devopen_common(dev); } int xfs_devclose(dev_t dev, int flag, int devtype, struct proc *p) { #ifdef XFS_DEBUG char devname[64]; #endif XFSDEB(XDEBDEV, ("xfs_devclose dev = %s, flag = 0x%x\n", xfs_devtoname_r(dev, devname, sizeof(devname)), flag)); return xfs_devclose_common(dev, p); } /* * Not used. */ int xfs_devioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct proc *p) { XFSDEB(XDEBDEV, ("xfs_devioctl dev = %d.%d, cmd = %lu, " "data = %lx, flags = %x\n", major(dev), minor(dev), (unsigned long)cmd, (unsigned long)data, flags)); return ENOTTY; } static int xfs_realselect(dev_t dev, struct proc *p) { struct xfs_channel *chan = &xfs_channel[minor(dev)]; if (!xfs_emptyq(&chan->messageq)) return 1; /* Something to read */ selrecord (p, &chan->selinfo); return 0; } #ifdef HAVE_VOP_POLL static int xfs_devpoll(dev_t dev, int events, struct proc * p) { char devname[64]; XFSDEB(XDEBDEV, ("xfs_devpoll dev = %s, events = 0x%x\n", xfs_devtoname_r (dev, devname, sizeof(devname)), events)); if (!(events & POLLRDNORM)) return 0; return xfs_realselect(dev, p); } #endif #ifdef HAVE_VOP_SELECT int xfs_devselect(dev_t dev, int which, struct proc * p) { XFSDEB(XDEBDEV, ("xfs_devselect dev = %d, which = %d\n", dev, which)); if (which != FREAD) return 0; return xfs_realselect(dev, p); } #endif void xfs_select_wakeup(struct xfs_channel *chan) { selwakeup (&chan->selinfo); } /* * Install and uninstall device. */ #if defined(__NetBSD__) struct cdevsw xfs_dev = { xfs_devopen, xfs_devclose, xfs_devread, xfs_devwrite, xfs_devioctl, (dev_type_stop((*))) enodev, 0, xfs_devpoll, (dev_type_mmap((*))) enodev, 0 }; #elif defined(__OpenBSD__) struct cdevsw xfs_dev = { xfs_devopen, xfs_devclose, xfs_devread, xfs_devwrite, xfs_devioctl, (dev_type_stop((*))) enodev, 0, xfs_devselect, (dev_type_mmap((*))) enodev, 0 }; #elif defined(__FreeBSD__) struct cdevsw xfs_dev = { xfs_devopen, xfs_devclose, xfs_devread, xfs_devwrite, xfs_devioctl, #ifdef HAVE_STRUCT_CDEVSW_D_STOP nostop, #endif #if defined(HAVE_STRUCT_CDEVSW_D_BOGORESET) \ || defined(HAVE_STRUCT_CDEVSW_D_RESET) noreset, #endif #ifdef HAVE_STRUCT_CDEVSW_D_DEVTOTTY nodevtotty, #endif #if defined(HAVE_VOP_SELECT) xfs_devselect, #elif defined(HAVE_VOP_POLL) xfs_devpoll, #else #error select or poll: that is the question #endif nommap, nostrategy, "xfs", #ifdef HAVE_STRUCT_CDEVSW_D_BOGOPARMS noparms, /* d_bogoparms */ #endif #ifdef HAVE_STRUCT_CDEVSW_D_SPARE NULL, /* d_spare */ #endif 128, /* XXX */ nodump, nopsize, 0, /* flags */ #ifdef HAVE_STRUCT_CDEVSW_D_MAXIO 0, /* maxio */ #endif #ifdef NOUDEV NOUDEV /* bmaj */ #else NODEV /* bmaj */ #endif }; #elif defined(__APPLE__) static struct cdevsw xfs_dev = { xfs_devopen, xfs_devclose, xfs_devread, xfs_devwrite, xfs_devioctl, eno_stop, eno_reset, 0, xfs_devselect, eno_mmap, eno_strat, eno_getc, eno_putc, 0 }; #endif /* __APPLE__ */ #if defined(__APPLE__) extern int xfs_dev_major; #include static void *devfs_handles[NXFS]; #endif int xfs_install_device(void) { int i; #if defined(__APPLE__) xfs_dev_major = cdevsw_add(-1, &xfs_dev); if (xfs_dev_major == -1) { XFSDEB(XDEBDEV, ("failed installing cdev\n")); return ENFILE; } for (i = 0; i < NXFS; ++i) devfs_handles[i] = devfs_make_node(makedev(xfs_dev_major, i), DEVFS_CHAR, UID_ROOT, GID_WHEEL, 0600, "xfs%d", i); XFSDEB(XDEBDEV, ("done installing cdev !\n")); XFSDEB(XDEBDEV, ("Char device number %d\n", xfs_dev_major)); #endif for (i = 0; i < NXFS; i++) { XFSDEB(XDEBDEV, ("before initq(messageq and sleepq)\n")); xfs_initq(&xfs_channel[i].messageq); xfs_initq(&xfs_channel[i].sleepq); xfs_channel[i].status = 0; } return 0; } int xfs_uninstall_device(void) { int i; struct xfs_channel *chan; int ret = 0; for (i = 0; i < NXFS; i++) { chan = &xfs_channel[i]; if (chan->status & CHANNEL_OPENED) xfs_devclose(makedev(0, i), 0, 0, NULL); } #if defined(__APPLE__) for (i = 0; i < NXFS; ++i) devfs_remove (devfs_handles[i]); ret = cdevsw_remove(xfs_dev_major, &xfs_dev); if (ret == -1) { XFSDEB(XDEBLKM, ("xfs_uninstall_device error %d\n", ret)); } else if (ret == xfs_dev_major) { ret = 0; } else { XFSDEB(XDEBLKM, ("xfs_uninstall_device unexpected error error %d\n", ret)); } #endif XFSDEB(XDEBLKM, ("xfs_uninstall_device error %d\n", ret)); return ret; } int xfs_stat_device(void) { return xfs_uprintf_device(); } #if !defined(_LKM) && !defined(KLD_MODULE) int xfs_is_xfs_dev(dev_t dev) { return major(dev) <= nchrdev && cdevsw[major(dev)].d_open == xfs_devopen && minor(dev) >= 0 && minor(dev) < NXFS; } #endif