1131476Spjd/*- 2131476Spjd * Copyright (c) 2002, 2003 Gordon Tetlow 3155801Spjd * Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org> 4131476Spjd * All rights reserved. 5131476Spjd * 6131476Spjd * Redistribution and use in source and binary forms, with or without 7131476Spjd * modification, are permitted provided that the following conditions 8131476Spjd * are met: 9131476Spjd * 1. Redistributions of source code must retain the above copyright 10131476Spjd * notice, this list of conditions and the following disclaimer. 11131476Spjd * 2. Redistributions in binary form must reproduce the above copyright 12131476Spjd * notice, this list of conditions and the following disclaimer in the 13131476Spjd * documentation and/or other materials provided with the distribution. 14131476Spjd * 15155801Spjd * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 16131476Spjd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17131476Spjd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18155801Spjd * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 19131476Spjd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20131476Spjd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21131476Spjd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22131476Spjd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23131476Spjd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24131476Spjd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25131476Spjd * SUCH DAMAGE. 26131476Spjd */ 27131476Spjd 28131476Spjd#include <sys/cdefs.h> 29131476Spjd__FBSDID("$FreeBSD$"); 30131476Spjd 31131476Spjd#include <sys/param.h> 32131476Spjd#include <sys/systm.h> 33131476Spjd#include <sys/kernel.h> 34131476Spjd#include <sys/malloc.h> 35131476Spjd 36131476Spjd#include <ufs/ufs/dinode.h> 37131476Spjd#include <ufs/ffs/fs.h> 38131476Spjd 39131476Spjd#include <geom/geom.h> 40131476Spjd#include <geom/label/g_label.h> 41131476Spjd 42190423Sivoras#define G_LABEL_UFS_VOLUME_DIR "ufs" 43190423Sivoras#define G_LABEL_UFS_ID_DIR "ufsid" 44131476Spjd 45190423Sivoras#define G_LABEL_UFS_VOLUME 0 46190423Sivoras#define G_LABEL_UFS_ID 1 47190423Sivoras 48131476Spjdstatic const int superblocks[] = SBLOCKSEARCH; 49131476Spjd 50131476Spjdstatic void 51190423Sivorasg_label_ufs_taste_common(struct g_consumer *cp, char *label, size_t size, int what) 52131476Spjd{ 53131476Spjd struct g_provider *pp; 54152971Ssobomax int sb, superblock; 55131476Spjd struct fs *fs; 56131476Spjd 57131476Spjd g_topology_assert_not(); 58131476Spjd pp = cp->provider; 59131476Spjd label[0] = '\0'; 60155797Spjd 61155797Spjd if (SBLOCKSIZE % cp->provider->sectorsize != 0) 62155798Spjd return; 63155797Spjd 64131476Spjd /* 65131476Spjd * Walk through the standard places that superblocks hide and look 66131476Spjd * for UFS magic. If we find magic, then check that the size in the 67131476Spjd * superblock corresponds to the size of the underlying provider. 68155174Spjd * Finally, look for a volume label and create an appropriate 69131476Spjd * provider based on that. 70131476Spjd */ 71131476Spjd for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) { 72141513Sdes /* 73155797Spjd * Take care not to issue an invalid I/O request. The offset of 74155797Spjd * the superblock candidate must be multiples of the provider's 75155797Spjd * sector size, otherwise an FFS can't exist on the provider 76155797Spjd * anyway. 77141513Sdes */ 78155797Spjd if (superblock % cp->provider->sectorsize != 0) 79141513Sdes continue; 80141513Sdes 81155797Spjd fs = (struct fs *)g_read_data(cp, superblock, SBLOCKSIZE, NULL); 82152967Ssobomax if (fs == NULL) 83131476Spjd continue; 84131476Spjd /* Check for magic and make sure things are the right size */ 85162357Spjd if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 && 86162357Spjd pp->mediasize / fs->fs_fsize == fs->fs_old_size) { 87156299Spjd /* Valid UFS1. */ 88156299Spjd } else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 && 89246284Strasz ((pp->mediasize / fs->fs_fsize == fs->fs_size) || 90246284Strasz (pp->mediasize / fs->fs_fsize == fs->fs_providersize))) { 91156299Spjd /* Valid UFS2. */ 92156299Spjd } else { 93131476Spjd g_free(fs); 94131476Spjd continue; 95131476Spjd } 96155801Spjd if (fs->fs_sblockloc != superblock || fs->fs_ncg < 1 || 97155801Spjd fs->fs_bsize < MINBSIZE || 98155801Spjd fs->fs_bsize < sizeof(struct fs)) { 99155801Spjd g_free(fs); 100155801Spjd continue; 101155801Spjd } 102155801Spjd G_LABEL_DEBUG(1, "%s file system detected on %s.", 103155801Spjd fs->fs_magic == FS_UFS1_MAGIC ? "UFS1" : "UFS2", pp->name); 104190423Sivoras switch (what) { 105190423Sivoras case G_LABEL_UFS_VOLUME: 106190423Sivoras /* Check for volume label */ 107190423Sivoras if (fs->fs_volname[0] == '\0') { 108190423Sivoras g_free(fs); 109190423Sivoras continue; 110190423Sivoras } 111190423Sivoras strlcpy(label, fs->fs_volname, size); 112190423Sivoras break; 113190423Sivoras case G_LABEL_UFS_ID: 114190423Sivoras if (fs->fs_id[0] == 0 && fs->fs_id[1] == 0) { 115190423Sivoras g_free(fs); 116190423Sivoras continue; 117190423Sivoras } 118190423Sivoras snprintf(label, size, "%08x%08x", fs->fs_id[0], 119190423Sivoras fs->fs_id[1]); 120190423Sivoras break; 121131476Spjd } 122131476Spjd g_free(fs); 123131476Spjd break; 124131476Spjd } 125131476Spjd} 126131476Spjd 127190423Sivorasstatic void 128190423Sivorasg_label_ufs_volume_taste(struct g_consumer *cp, char *label, size_t size) 129190423Sivoras{ 130190423Sivoras 131190423Sivoras g_label_ufs_taste_common(cp, label, size, G_LABEL_UFS_VOLUME); 132190423Sivoras} 133190423Sivoras 134190423Sivorasstatic void 135190423Sivorasg_label_ufs_id_taste(struct g_consumer *cp, char *label, size_t size) 136190423Sivoras{ 137190423Sivoras 138190423Sivoras g_label_ufs_taste_common(cp, label, size, G_LABEL_UFS_ID); 139190423Sivoras} 140190423Sivoras 141199875Straszstruct g_label_desc g_label_ufs_volume = { 142190423Sivoras .ld_taste = g_label_ufs_volume_taste, 143199875Strasz .ld_dir = G_LABEL_UFS_VOLUME_DIR, 144199875Strasz .ld_enabled = 1 145131476Spjd}; 146190423Sivoras 147199875Straszstruct g_label_desc g_label_ufs_id = { 148190423Sivoras .ld_taste = g_label_ufs_id_taste, 149199875Strasz .ld_dir = G_LABEL_UFS_ID_DIR, 150199875Strasz .ld_enabled = 1 151190423Sivoras}; 152199875Strasz 153199875StraszG_LABEL_INIT(ufsid, g_label_ufs_id, "Create device nodes for UFS file system IDs"); 154199875StraszG_LABEL_INIT(ufs, g_label_ufs_volume, "Create device nodes for UFS volume names"); 155