Current Path : /sys/dev/lindev/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/dev/lindev/full.c |
/*- * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org> * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/dev/lindev/full.c 197518 2009-09-26 12:45:28Z bz $"); #include <sys/param.h> #include <sys/conf.h> #include <sys/kernel.h> #include <sys/malloc.h> #include <sys/module.h> #include <sys/systm.h> #include <sys/uio.h> #include <dev/lindev/lindev.h> static struct cdev *full_dev; static d_read_t full_read; static d_write_t full_write; static struct cdevsw full_cdevsw = { .d_version = D_VERSION, .d_read = full_read, .d_write = full_write, .d_name = "full", }; static void *zbuf; /* ARGSUSED */ static int full_read(struct cdev *dev __unused, struct uio *uio, int flags __unused) { int error = 0; while (uio->uio_resid > 0 && error == 0) error = uiomove(zbuf, MIN(uio->uio_resid, PAGE_SIZE), uio); return (error); } /* ARGSUSED */ static int full_write(struct cdev *dev __unused, struct uio *uio __unused, int flags __unused) { return (ENOSPC); } /* ARGSUSED */ int lindev_modevent_full(module_t mod __unused, int type, void *data __unused) { switch(type) { case MOD_LOAD: zbuf = (void *)malloc(PAGE_SIZE, M_TEMP, M_WAITOK | M_ZERO); full_dev = make_dev(&full_cdevsw, 0, UID_ROOT, GID_WHEEL, 0666, "full"); if (bootverbose) printf("full: <full device>\n"); break; case MOD_UNLOAD: destroy_dev(full_dev); free(zbuf, M_TEMP); break; case MOD_SHUTDOWN: break; default: return (EOPNOTSUPP); } return (0); }