probe.c revision 50b380b4d4ab668bad45033e3a8aaf93c7f42844
1e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o/* 2e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * probe.c - identify a block device by its contents, and return a dev 3e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * struct with the details 4e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * 5e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * Copyright (C) 1999 by Andries Brouwer 650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * Copyright (C) 1999, 2000, 2003 by Theodore Ts'o 7e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * Copyright (C) 2001 by Andreas Dilger 8e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * 9e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * %Begin-Header% 10e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * This file may be redistributed under the terms of the 11e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * GNU Lesser General Public License. 12e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * %End-Header% 13e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o */ 14e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 15e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <stdio.h> 16e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <string.h> 17e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <stdlib.h> 18e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <unistd.h> 19e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <fcntl.h> 20e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <sys/types.h> 21e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#ifdef HAVE_SYS_STAT_H 22e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <sys/stat.h> 23e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#endif 24e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#ifdef HAVE_SYS_MKDEV_H 25e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <sys/mkdev.h> 26e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#endif 27e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#ifdef HAVE_ERRNO_H 28e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include <errno.h> 29e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#endif 307a603aa89fcffb8798eca34ca3858db6f0393046Theodore Ts'o#include "blkidP.h" 31e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include "uuid/uuid.h" 32e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#include "probe.h" 33e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 34e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o/* #define DEBUG_PROBE */ 35e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#ifdef DEBUG_PROBE 36d3f917989badf78d1f97654e46d60d1f3d25cd17Theodore Ts'o#define DBG(x) x 37e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#else 38d3f917989badf78d1f97654e46d60d1f3d25cd17Theodore Ts'o#define DBG(x) 39e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#endif 40e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 41e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o/* 4250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * This is a special case code to check for an MDRAID device. We do 4350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * this special since it requires checking for a superblock at the end 4450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * of the device. 45e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o */ 4650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic int check_mdraid(int fd, unsigned char *ret_uuid) 47e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 4850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o struct mdp_superblock_s *md; 4950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_loff_t offset; 5050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o char buf[4096]; 5150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 5250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (fd < 0) 53e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return -BLKID_ERR_PARAM; 54e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 5550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o offset = (blkid_get_dev_size(fd) & ~((blkid_loff_t)65535)) - 65536; 56e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 57e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (blkid_llseek(fd, offset, 0) < 0 || 5850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o read(fd, buf, 4096) != 4096) 59e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return -BLKID_ERR_IO; 60e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 6150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o /* Check for magic number */ 6250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (memcmp("\251+N\374", buf, 4)) 63e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return -BLKID_ERR_PARAM; 64e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 6550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (!ret_uuid) 6650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o return 0; 6750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o *ret_uuid = 0; 68e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 6950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o /* The MD UUID is not contiguous in the superblock, make it so */ 7050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o md = (struct mdp_superblock_s *)buf; 7150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (md->set_uuid0 || md->set_uuid1 || md->set_uuid2 || md->set_uuid3) { 7250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o memcpy(ret_uuid, &md->set_uuid0, 4); 7350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o memcpy(ret_uuid, &md->set_uuid1, 12); 74e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 7550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o return 0; 7650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o} 77e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 7850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic void set_uuid(blkid_dev dev, uuid_t uuid) 7950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o{ 8050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o char str[37]; 81e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 8250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (!uuid_is_null(uuid)) { 8350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o uuid_unparse(uuid, str); 8450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "UUID", str, sizeof(str), 1); 8550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o } 86e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 87e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 8850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic int probe_ext2(int fd, blkid_cache cache, blkid_dev dev, 89e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct blkid_magic *id, unsigned char *buf, 9050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o const char **ret_sectype) 91e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 92e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct ext2_super_block *es; 93e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 94e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o es = (struct ext2_super_block *)buf; 95e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 9650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o DBG(printf("ext2_sb.compat = %08X:%08X:%08X\n", 9776b07bb1bc9cbcb70a94cb235954eaac993920adTheodore Ts'o blkid_le32(es->s_feature_compat), 9876b07bb1bc9cbcb70a94cb235954eaac993920adTheodore Ts'o blkid_le32(es->s_feature_incompat), 9976b07bb1bc9cbcb70a94cb235954eaac993920adTheodore Ts'o blkid_le32(es->s_feature_ro_compat))); 100e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 101e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o /* Make sure we don't keep re-probing as ext2 for a journaled fs */ 102e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (!strcmp(id->bim_type, "ext2") && 10350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o ((blkid_le32(es->s_feature_compat) & 10450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o EXT3_FEATURE_COMPAT_HAS_JOURNAL) || 10550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o (blkid_le32(es->s_feature_incompat) & 10650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o EXT3_FEATURE_INCOMPAT_JOURNAL_DEV))) 107e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return -BLKID_ERR_PARAM; 108e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 10950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (strlen(es->s_volume_name)) 11050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "LABEL", es->s_volume_name, 11150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o sizeof(es->s_volume_name), 1); 112e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 11350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o set_uuid(dev, es->s_uuid); 114e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 115e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return 0; 116e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 117e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 11850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic int probe_jbd(int fd, blkid_cache cache, blkid_dev dev, 119e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct blkid_magic *id, unsigned char *buf, 12050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o const char **ret_sectype) 121e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 12250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o struct ext2_super_block *es = (struct ext2_super_block *) buf; 123e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 12476b07bb1bc9cbcb70a94cb235954eaac993920adTheodore Ts'o if (!(blkid_le32(es->s_feature_incompat) & 12550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) 126e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return -BLKID_ERR_PARAM; 127e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 12850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o return (probe_ext2(fd, cache, dev, id, buf, ret_sectype)); 129e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 130e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 13150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic int probe_ext3(int fd, blkid_cache cache, blkid_dev dev, 13250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o struct blkid_magic *id, unsigned char *buf, 13350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o const char **ret_sectype) 134e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 13550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o struct ext2_super_block *es = (struct ext2_super_block *) buf; 136e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o int ret; 137e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 13876b07bb1bc9cbcb70a94cb235954eaac993920adTheodore Ts'o if (!(blkid_le32(es->s_feature_compat) & 13950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o EXT3_FEATURE_COMPAT_HAS_JOURNAL)) 140e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return -BLKID_ERR_PARAM; 14150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 14250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if ((ret = probe_ext2(fd, cache, dev, id, buf, ret_sectype)) < 0) 14350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o return ret; 144e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 14576b07bb1bc9cbcb70a94cb235954eaac993920adTheodore Ts'o if (!(blkid_le32(es->s_feature_incompat) & 14650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o EXT3_FEATURE_INCOMPAT_RECOVER)) 14750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o *ret_sectype = "ext2"; 148e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 149e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return 0; 150e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 151e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 15250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic int probe_vfat(int fd, blkid_cache cache, blkid_dev dev, 153e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct blkid_magic *id, unsigned char *buf, 15450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o const char **ret_sectype) 155e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 156e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct vfat_super_block *vs; 157e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o char serno[10]; 158e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 159e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o vs = (struct vfat_super_block *)buf; 160e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 161e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (strncmp(vs->vs_label, "NO NAME", 7)) { 162d3f917989badf78d1f97654e46d60d1f3d25cd17Theodore Ts'o char *end = vs->vs_label + sizeof(vs->vs_label) - 1; 163e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 164e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o while (*end == ' ' && end >= vs->vs_label) 165e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o --end; 166e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (end >= vs->vs_label) 16750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "LABEL", vs->vs_label, 16850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o end - vs->vs_label + 1, 1); 169e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 170e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 171e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o /* We can't just print them as %04X, because they are unaligned */ 172e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o sprintf(serno, "%02X%02X-%02X%02X", vs->vs_serno[3], vs->vs_serno[2], 173e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o vs->vs_serno[1], vs->vs_serno[0]); 17450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "UUID", serno, sizeof(serno), 1); 175e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 176e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return 0; 177e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 178e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 17950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic int probe_msdos(int fd, blkid_cache cache, blkid_dev dev, 180e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct blkid_magic *id, unsigned char *buf, 18150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o const char **ret_sectype) 182e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 18350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o struct msdos_super_block *ms = (struct msdos_super_block *) buf; 184e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o char serno[10]; 185e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 186e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (strncmp(ms->ms_label, "NO NAME", 7)) { 187d3f917989badf78d1f97654e46d60d1f3d25cd17Theodore Ts'o char *end = ms->ms_label + sizeof(ms->ms_label) - 1; 188e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 189e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o while (*end == ' ' && end >= ms->ms_label) 190e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o --end; 191e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (end >= ms->ms_label) 19250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "LABEL", ms->ms_label, 19350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o end - ms->ms_label + 1, 1); 194e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 195e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 196e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o /* We can't just print them as %04X, because they are unaligned */ 197e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o sprintf(serno, "%02X%02X-%02X%02X", ms->ms_serno[3], ms->ms_serno[2], 198e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o ms->ms_serno[1], ms->ms_serno[0]); 19950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "UUID", serno, 0, 1); 200e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 201e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return 0; 202e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 203e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 20450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic int probe_xfs(int fd, blkid_cache cache, blkid_dev dev, 205e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct blkid_magic *id, unsigned char *buf, 20650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o const char **ret_sectype) 207e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 208e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct xfs_super_block *xs; 209e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 210e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o xs = (struct xfs_super_block *)buf; 211e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 212e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (strlen(xs->xs_fname)) 21350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "LABEL", xs->xs_fname, 21450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o sizeof(xs->xs_fname), 1); 21550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o set_uuid(dev, xs->xs_uuid); 216e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return 0; 217e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 218e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 21950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic int probe_reiserfs(int fd, blkid_cache cache, blkid_dev dev, 220e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct blkid_magic *id, unsigned char *buf, 22150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o const char **ret_sectype) 222e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 22350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o struct reiserfs_super_block *rs = (struct reiserfs_super_block *) buf; 224e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o unsigned int blocksize; 225e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 22676b07bb1bc9cbcb70a94cb235954eaac993920adTheodore Ts'o blocksize = blkid_le16(rs->rs_blocksize); 227e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 228e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o /* If the superblock is inside the journal, we have the wrong one */ 22950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (id->bim_kboff/(blocksize>>10) > blkid_le32(rs->rs_journal_block)) 230e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return -BLKID_ERR_BIG; 231e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 232e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o /* LABEL/UUID are only valid for later versions of Reiserfs v3.6. */ 233e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (!strcmp(id->bim_magic, "ReIsEr2Fs") || 234e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o !strcmp(id->bim_magic, "ReIsEr3Fs")) { 235e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (strlen(rs->rs_label)) { 23650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "LABEL", rs->rs_label, 23750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o sizeof(rs->rs_label), 1); 238e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 239e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 24050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o set_uuid(dev, rs->rs_uuid); 241e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 242e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 243e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return 0; 244e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 245e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 246e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o/* 247e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * BLKID_BLK_OFFS is at least as large as the highest bim_kboff defined 24850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * in the type_array table below + bim_kbalign. 24950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * 25050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * When probing for a lot of magics, we handle everything in 1kB buffers so 25150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * that we don't have to worry about reading each combination of block sizes. 252e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o */ 25350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o#define BLKID_BLK_OFFS 64 /* currently reiserfs */ 254e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 255e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o/* 256e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * Various filesystem magics that we can check for. Note that kboff and 257e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * sboff are in kilobytes and bytes respectively. All magics are in 258e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * byte strings so we don't worry about endian issues. 259e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o */ 26050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic struct blkid_magic type_array[] = { 26150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o/* type kboff sboff len magic probe */ 26250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "jbd", 1, 0x38, 2, "\123\357", probe_jbd }, 26350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "ext3", 1, 0x38, 2, "\123\357", probe_ext3 }, 26450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "ext2", 1, 0x38, 2, "\123\357", probe_ext2 }, 26550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "reiserfs", 8, 0x34, 8, "ReIsErFs", probe_reiserfs }, 26650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "reiserfs", 64, 0x34, 9, "ReIsEr2Fs", probe_reiserfs }, 26750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "reiserfs", 64, 0x34, 9, "ReIsEr3Fs", probe_reiserfs }, 26850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "reiserfs", 64, 0x34, 8, "ReIsErFs", probe_reiserfs }, 26950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "reiserfs", 8, 20, 8, "ReIsErFs", probe_reiserfs }, 27050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "ntfs", 0, 3, 8, "NTFS ", 0 }, 27150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "vfat", 0, 0x52, 5, "MSWIN", probe_vfat }, 27250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "vfat", 0, 0x52, 8, "FAT32 ", probe_vfat }, 27350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "msdos", 0, 0x36, 5, "MSDOS", probe_msdos }, 27450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "msdos", 0, 0x36, 8, "FAT16 ", probe_msdos }, 27550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "msdos", 0, 0x36, 8, "FAT12 ", probe_msdos }, 27650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "minix", 1, 0x10, 2, "\177\023", 0 }, 27750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "minix", 1, 0x10, 2, "\217\023", 0 }, 27850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "minix", 1, 0x10, 2, "\150\044", 0 }, 27950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "minix", 1, 0x10, 2, "\170\044", 0 }, 28050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "vxfs", 1, 0, 4, "\365\374\001\245", 0 }, 28150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "xfs", 0, 0, 4, "XFSB", probe_xfs }, 28250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "romfs", 0, 0, 8, "-rom1fs-", 0 }, 28350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "bfs", 0, 0, 4, "\316\372\173\033", 0 }, 28450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "cramfs", 0, 0, 4, "E=\315\034", 0 }, 28550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "qnx4", 0, 4, 6, "QNX4FS", 0 }, 28650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "iso9660", 32, 1, 5, "CD001", 0 }, 28750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "iso9660", 32, 9, 5, "CDROM", 0 }, 28850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "udf", 32, 1, 5, "BEA01", 0 }, 28950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "udf", 32, 1, 5, "BOOT2", 0 }, 29050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "udf", 32, 1, 5, "CD001", 0 }, 29150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "udf", 32, 1, 5, "CDW02", 0 }, 29250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "udf", 32, 1, 5, "NSR02", 0 }, 29350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "udf", 32, 1, 5, "NSR03", 0 }, 29450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "udf", 32, 1, 5, "TEA01", 0 }, 29550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "jfs", 32, 0, 4, "JFS1", 0 }, 29650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "hfs", 1, 0, 2, "BD", 0 }, 29750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "ufs", 8, 0x55c, 4, "T\031\001\000", 0 }, 29850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "hpfs", 8, 0, 4, "I\350\225\371", 0 }, 29950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "sysv", 0, 0x3f8, 4, "\020~\030\375", 0 }, 30050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "swap", 0, 0xff6, 10, "SWAP-SPACE", 0 }, 30150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "swap", 0, 0xff6, 10, "SWAPSPACE2", 0 }, 30250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "swap", 0, 0x1ff6, 10, "SWAP-SPACE", 0 }, 30350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "swap", 0, 0x1ff6, 10, "SWAPSPACE2", 0 }, 30450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "swap", 0, 0x3ff6, 10, "SWAP-SPACE", 0 }, 30550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { "swap", 0, 0x3ff6, 10, "SWAPSPACE2", 0 }, 30650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o { NULL, 0, 0, 0, NULL, NULL } 307e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o}; 308e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 309e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o/* 31050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * If a device's filesystem no longer checks out, we need to nuke 31150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * information about it from the entry. 312e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o */ 31350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ostatic void blkid_invalidate_fs(blkid_dev dev) 314e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 31550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "TYPE", 0, 0, 0); 31650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "LABEL", 0, 0, 0); 31750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "UUID", 0, 0, 0); 31850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o} 319e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 320e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o/* 321e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * Verify that the data in dev is consistent with what is on the actual 322e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * block device (using the devname field only). Normally this will be 323e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * called when finding items in the cache, but for long running processes 324e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * is also desirable to revalidate an item before use. 325e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * 326e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * If we are unable to revalidate the data, we return the old data and 327e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o * do not set the BLKID_BID_FL_VERIFIED flag on it. 328e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o */ 3297a603aa89fcffb8798eca34ca3858db6f0393046Theodore Ts'oblkid_dev blkid_verify_devname(blkid_cache cache, blkid_dev dev) 330e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 331e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o struct blkid_magic *id; 33250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o unsigned char *bufs[BLKID_BLK_OFFS + 1], *buf; 33350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o const char *sec_type, *type; 33450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o struct stat st; 335e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o time_t diff; 33650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o int fd, idx; 337e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 338e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (!dev) 339e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return NULL; 340e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 341e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o diff = time(0) - dev->bid_time; 342e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 343e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (diff < BLKID_PROBE_MIN || (dev->bid_flags & BLKID_BID_FL_VERIFIED && 344e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o diff < BLKID_PROBE_INTERVAL)) 345e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return dev; 346e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 347d3f917989badf78d1f97654e46d60d1f3d25cd17Theodore Ts'o DBG(printf("need to revalidate %s\n", dev->bid_name)); 348e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 34950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (((fd = open(dev->bid_name, O_RDONLY)) < 0) || 35050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o (fstat(fd, &st) < 0) || !S_ISBLK(st.st_mode)) { 351e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (errno == ENXIO || errno == ENODEV) { 352e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o blkid_free_dev(dev); 353e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return NULL; 354e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 355e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o /* We don't have read permission, just return cache data. */ 356d3f917989badf78d1f97654e46d60d1f3d25cd17Theodore Ts'o DBG(printf("returning unverified data for %s\n", dev->bid_name)); 357e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return dev; 358e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 359e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 36050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o memset(bufs, 0, sizeof(bufs)); 36150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 36250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o /* 36350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * Iterate over the type array. If we already know the type, 36450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * then try that first. If it doesn't work, then blow away 36550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * the type information, and try again. 36650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * 36750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o */ 36850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'otry_again: 36950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o type = 0; 37050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o sec_type = 0; 37150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (!dev->bid_type || !strcmp(dev->bid_type, "mdraid")) { 37250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o uuid_t uuid; 37350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 37450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (check_mdraid(fd, uuid) == 0) { 37550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o set_uuid(dev, uuid); 37650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o type = "mdraid"; 37750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o goto found_type; 37850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o } 37950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o } 380e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o for (id = type_array; id->bim_type; id++) { 38150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (dev->bid_type && 38250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o strcmp(id->bim_type, dev->bid_type)) 38350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o continue; 38450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 38550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o idx = id->bim_kboff + (id->bim_sboff >> 10); 38650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (idx > BLKID_BLK_OFFS || idx < 0) 38750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o continue; 38850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o buf = bufs[idx]; 38950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (!buf) { 39050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (lseek(fd, idx << 10, SEEK_SET) < 0) 39150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o continue; 39250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 39350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (!(buf = (unsigned char *)malloc(1024))) 39450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o continue; 39550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 39650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (read(fd, buf, 1024) != 1024) { 39750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o free(buf); 39850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o continue; 399e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 40050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o bufs[idx] = buf; 40150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o } 402e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 40350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (memcmp(id->bim_magic, buf + (id->bim_sboff&0x3ff), 40450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o id->bim_len)) 40550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o continue; 40650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 40750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if ((id->bim_probe == NULL) || 40850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o (id->bim_probe(fd, cache, dev, id, buf, &sec_type) == 0)) { 40950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o type = id->bim_type; 41050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o goto found_type; 411e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 412e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 413e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 41450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (!id->bim_type && dev->bid_type) { 41550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o /* 41650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o * Zap the device filesystem type and try again 41750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o */ 41850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_invalidate_fs(dev); 41950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o goto try_again; 42050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o } 421e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 42250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (!dev->bid_type) { 423e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o blkid_free_dev(dev); 42450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o return NULL; 42550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o } 42650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 42750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'ofound_type: 42850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (dev && type) { 42950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o dev->bid_devno = st.st_rdev; 43050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o dev->bid_time = time(0); 43150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o dev->bid_flags |= BLKID_BID_FL_VERIFIED; 43250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 43350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "TYPE", type, 0, 1); 43450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (sec_type) 43550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_set_tag(dev, "TYPE", sec_type, 0, 0); 43650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 43750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o DBG(printf("%s: devno 0x%04Lx, type %s\n", 43850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o dev->bid_name, st.st_rdev, type)); 439e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 440e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 441e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o close(fd); 442e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 443e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return dev; 444e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 445e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 446e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#ifdef TEST_PROGRAM 447e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'oint main(int argc, char **argv) 448e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o{ 4497a603aa89fcffb8798eca34ca3858db6f0393046Theodore Ts'o blkid_dev dev; 45050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_cache cache; 451e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o 452e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o if (argc != 2) { 453e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o fprintf(stderr, "Usage: %s device\n" 454e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o "Probe a single device to determine type\n", argv[0]); 455e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o exit(1); 456e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o } 45750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o cache = blkid_new_cache(); 45850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o dev = blkid_get_devname(cache, argv[1], BLKID_DEV_NORMAL); 45950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (!dev) { 460e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o printf("%s: %s has an unsupported type\n", argv[0], argv[1]); 46150b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o return (1); 46250b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o } 46350b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o printf("%s is type %s\n", argv[1], dev->bid_type ? 46450b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o dev->bid_type : "(null)"); 46550b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (dev->bid_label) 46650b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o printf("\tlabel is '%s'\n", dev->bid_label); 46750b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o if (dev->bid_uuid) 46850b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o printf("\tuuid is %s\n", dev->bid_uuid); 46950b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o 47050b380b4d4ab668bad45033e3a8aaf93c7f42844Theodore Ts'o blkid_free_dev(dev); 471e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o return (0); 472e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o} 473e12f2ae74c2eb8997bf13adf8fdd7e7313971eaeTheodore Ts'o#endif 474