1 /* $NetBSD: ld_at_virtio.c,v 1.4 2017/05/10 06:22:15 sevan Exp $ */ 2 3 /* 4 * Copyright (c) 2010 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: ld_at_virtio.c,v 1.4 2017/05/10 06:22:15 sevan Exp $"); 30 31 #include <sys/param.h> 32 #include <sys/conf.h> 33 #include <sys/device.h> 34 #include <sys/bus.h> 35 #include <sys/stat.h> 36 #include <sys/disklabel.h> 37 38 #include <rump-sys/kern.h> 39 #include <rump-sys/vfs.h> 40 41 #include "ioconf.c" 42 43 RUMP_COMPONENT(RUMP_COMPONENT_DEV) 44 { 45 46 config_init_component(cfdriver_ioconf_ld_virtio, 47 cfattach_ioconf_ld_virtio, cfdata_ioconf_ld_virtio); 48 } 49 50 /* 51 * Pseudo-devfs. Since creating device nodes is non-free, don't 52 * speculatively create hundreds of them (= milliseconds slower 53 * bootstrap). Instead, after the probe is done, see which units 54 * were found and create nodes only for them. 55 */ 56 RUMP_COMPONENT(RUMP_COMPONENT_POSTINIT) 57 { 58 extern const struct bdevsw ld_bdevsw; 59 extern const struct cdevsw ld_cdevsw; 60 devmajor_t bmaj = -1, cmaj = -1; 61 int error, i; 62 63 if ((error = devsw_attach("ld", &ld_bdevsw, &bmaj, 64 &ld_cdevsw, &cmaj)) != 0) 65 panic("cannot attach ld: %d", error); 66 67 for (i = 0; i < 10; i++) { 68 char bbase[] = "/dev/ldX"; 69 char rbase[] = "/dev/rldX"; 70 71 if (device_lookup(&ld_cd, i) == NULL) 72 break; 73 74 bbase[sizeof(bbase)-2] = '0' + i; 75 rbase[sizeof(rbase)-2] = '0' + i; 76 77 if ((error = rump_vfs_makedevnodes(S_IFBLK, bbase, 'a', 78 bmaj, DISKMINOR(i, 0), 5)) != 0) 79 panic("cannot create cooked ld dev nodes: %d", error); 80 if ((error = rump_vfs_makedevnodes(S_IFCHR, rbase, 'a', 81 cmaj, DISKMINOR(i, 0), 5)) != 0) 82 panic("cannot create raw ld dev nodes: %d", error); 83 } 84 } 85