* Copyright (C) 1999 by Andries Brouwer
* Copyright (C) 1999, 2000, 2003 by Theodore Ts'o
* Copyright (C) 2001 by Andreas Dilger
+ * Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* %Begin-Header%
* This file may be redistributed under the terms of the
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
+#include <ctype.h>
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#ifdef HAVE_SYS_MKDEV_H
#include <sys/mkdev.h>
#endif
+#ifdef __linux__
+#include <sys/utsname.h>
+#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include "uuid/uuid.h"
#include "probe.h"
+static int figure_label_len(const unsigned char *label, int len)
+{
+ const unsigned char *end = label + len - 1;
+
+ while ((*end == ' ' || *end == 0) && end >= label)
+ --end;
+ if (end >= label) {
+ label = label;
+ return end - label + 1;
+ }
+ return 0;
+}
+
+static unsigned char *get_buffer(struct blkid_probe *pr,
+ blkid_loff_t off, size_t len)
+{
+ ssize_t ret_read;
+ unsigned char *newbuf;
+
+ if (off + len <= SB_BUFFER_SIZE) {
+ if (!pr->sbbuf) {
+ pr->sbbuf = malloc(SB_BUFFER_SIZE);
+ if (!pr->sbbuf)
+ return NULL;
+ if (lseek(pr->fd, 0, SEEK_SET) < 0)
+ return NULL;
+ ret_read = read(pr->fd, pr->sbbuf, SB_BUFFER_SIZE);
+ if (ret_read < 0)
+ ret_read = 0;
+ pr->sb_valid = ret_read;
+ }
+ if (off+len > pr->sb_valid)
+ return NULL;
+ return pr->sbbuf + off;
+ } else {
+ if (len > pr->buf_max) {
+ newbuf = realloc(pr->buf, len);
+ if (newbuf == NULL)
+ return NULL;
+ pr->buf = newbuf;
+ pr->buf_max = len;
+ }
+ if (blkid_llseek(pr->fd, off, SEEK_SET) < 0)
+ return NULL;
+ ret_read = read(pr->fd, pr->buf, len);
+ if (ret_read != (ssize_t) len)
+ return NULL;
+ return pr->buf;
+ }
+}
+
+
/*
* This is a special case code to check for an MDRAID device. We do
* this special since it requires checking for a superblock at the end
struct mdp_superblock_s *md;
blkid_loff_t offset;
char buf[4096];
-
+
if (fd < 0)
return -BLKID_ERR_PARAM;
return -BLKID_ERR_IO;
/* Check for magic number */
- if (memcmp("\251+N\374", buf, 4))
+ if (memcmp("\251+N\374", buf, 4) && memcmp("\374N+\251", buf, 4))
return -BLKID_ERR_PARAM;
if (!ret_uuid)
md = (struct mdp_superblock_s *)buf;
if (md->set_uuid0 || md->set_uuid1 || md->set_uuid2 || md->set_uuid3) {
memcpy(ret_uuid, &md->set_uuid0, 4);
- memcpy(ret_uuid, &md->set_uuid1, 12);
+ memcpy(ret_uuid + 4, &md->set_uuid1, 12);
}
return 0;
}
-static void set_uuid(blkid_dev dev, uuid_t uuid)
+static void set_uuid(blkid_dev dev, uuid_t uuid, const char *tag)
{
char str[37];
if (!uuid_is_null(uuid)) {
uuid_unparse(uuid, str);
- blkid_set_tag(dev, "UUID", str, sizeof(str));
+ blkid_set_tag(dev, tag ? tag : "UUID", str, sizeof(str));
}
}
-static void get_ext2_info(blkid_dev dev, unsigned char *buf)
+static void get_ext2_info(blkid_dev dev, struct blkid_magic *id,
+ unsigned char *buf)
{
struct ext2_super_block *es = (struct ext2_super_block *) buf;
const char *label = 0;
- DBG(DEBUG_PROBE, printf("ext2_sb.compat = %08X:%08X:%08X\n",
+ DBG(DEBUG_PROBE, printf("ext2_sb.compat = %08X:%08X:%08X\n",
blkid_le32(es->s_feature_compat),
blkid_le32(es->s_feature_incompat),
blkid_le32(es->s_feature_ro_compat)));
label = es->s_volume_name;
blkid_set_tag(dev, "LABEL", label, sizeof(es->s_volume_name));
- set_uuid(dev, es->s_uuid);
+ set_uuid(dev, es->s_uuid, 0);
+
+ if ((es->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
+ !uuid_is_null(es->s_journal_uuid))
+ set_uuid(dev, es->s_journal_uuid, "EXT_JOURNAL");
+
+ if (strcmp(id->bim_type, "ext2") &&
+ ((blkid_le32(es->s_feature_incompat) &
+ EXT2_FEATURE_INCOMPAT_UNSUPPORTED) == 0))
+ blkid_set_tag(dev, "SEC_TYPE", "ext2", sizeof("ext2"));
}
-static int probe_ext3(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf)
+/*
+ * Check to see if a filesystem is in /proc/filesystems.
+ * Returns 1 if found, 0 if not
+ */
+static int fs_proc_check(const char *fs_name)
+{
+ FILE *f;
+ char buf[80], *cp, *t;
+
+ f = fopen("/proc/filesystems", "r");
+ if (!f)
+ return (0);
+ while (!feof(f)) {
+ if (!fgets(buf, sizeof(buf), f))
+ break;
+ cp = buf;
+ if (!isspace(*cp)) {
+ while (*cp && !isspace(*cp))
+ cp++;
+ }
+ while (*cp && isspace(*cp))
+ cp++;
+ if ((t = strchr(cp, '\n')) != NULL)
+ *t = 0;
+ if ((t = strchr(cp, '\t')) != NULL)
+ *t = 0;
+ if ((t = strchr(cp, ' ')) != NULL)
+ *t = 0;
+ if (!strcmp(fs_name, cp)) {
+ fclose(f);
+ return (1);
+ }
+ }
+ fclose(f);
+ return (0);
+}
+
+/*
+ * Check to see if a filesystem is available as a module
+ * Returns 1 if found, 0 if not
+ */
+static int check_for_modules(const char *fs_name)
+{
+#ifdef __linux__
+ struct utsname uts;
+ FILE *f;
+ char buf[1024], *cp;
+ int namesz;
+
+ if (uname(&uts))
+ return (0);
+ snprintf(buf, sizeof(buf), "/lib/modules/%s/modules.dep", uts.release);
+
+ f = fopen(buf, "r");
+ if (!f)
+ return (0);
+
+ namesz = strlen(fs_name);
+
+ while (!feof(f)) {
+ if (!fgets(buf, sizeof(buf), f))
+ break;
+ if ((cp = strchr(buf, ':')) != NULL)
+ *cp = 0;
+ else
+ continue;
+ if ((cp = strrchr(buf, '/')) != NULL)
+ cp++;
+ else
+ cp = buf;
+ if (!strncmp(cp, fs_name, namesz) &&
+ (!strcmp(cp + namesz, ".ko") ||
+ !strcmp(cp + namesz, ".ko.gz"))) {
+ fclose(f);
+ return (1);
+ }
+ }
+ fclose(f);
+#endif
+ return (0);
+}
+
+static int linux_version_code()
+{
+#ifdef __linux__
+ struct utsname ut;
+ static version_code = -1;
+ int major, minor, rev;
+ char *endptr;
+ const char *cp;
+
+ if (version_code > 0)
+ return version_code;
+
+ if (uname(&ut))
+ return 0;
+ cp = ut.release;
+
+ major = strtol(cp, &endptr, 10);
+ if (cp == endptr || *endptr != '.')
+ return 0;
+ cp = endptr + 1;
+ minor = strtol(cp, &endptr, 10);
+ if (cp == endptr || *endptr != '.')
+ return 0;
+ cp = endptr + 1;
+ rev = strtol(cp, &endptr, 10);
+ if (cp == endptr)
+ return 0;
+ version_code = (((major * 256) + minor) * 256) + rev;
+ return version_code;
+#else
+ return 0;
+#endif
+}
+
+#define EXT4_SUPPORTS_EXT2 (2 * 65536 + 6*256 + 29)
+
+static int system_supports_ext2(void)
+{
+ static time_t last_check = 0;
+ static int ret = -1;
+ time_t now = time(0);
+
+ if (ret != -1 || (now - last_check) < 5)
+ return ret;
+ last_check = now;
+ ret = (fs_proc_check("ext2") || check_for_modules("ext2"));
+ return ret;
+}
+
+static int system_supports_ext4(void)
+{
+ static time_t last_check = 0;
+ static int ret = -1;
+ time_t now = time(0);
+
+ if (ret != -1 || (now - last_check) < 5)
+ return ret;
+ last_check = now;
+ ret = (fs_proc_check("ext4") || check_for_modules("ext4"));
+ return ret;
+}
+
+static int system_supports_ext4dev(void)
+{
+ static time_t last_check = 0;
+ static int ret = -1;
+ time_t now = time(0);
+
+ if (ret != -1 || (now - last_check) < 5)
+ return ret;
+ last_check = now;
+ ret = (fs_proc_check("ext4dev") || check_for_modules("ext4dev"));
+ return ret;
+}
+
+static int probe_ext4dev(struct blkid_probe *probe,
+ struct blkid_magic *id,
+ unsigned char *buf)
{
struct ext2_super_block *es;
+ es = (struct ext2_super_block *)buf;
+
+ /* Distinguish from jbd */
+ if (blkid_le32(es->s_feature_incompat) &
+ EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
+ return -BLKID_ERR_PARAM;
+
+ /*
+ * If the filesystem does not have a journal and ext2 and ext4
+ * is not present, then force this to be detected as an
+ * ext4dev filesystem.
+ */
+ if (!(blkid_le32(es->s_feature_compat) &
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
+ !system_supports_ext2() && !system_supports_ext4() &&
+ system_supports_ext4dev() &&
+ linux_version_code() >= EXT4_SUPPORTS_EXT2)
+ goto force_ext4dev;
+
+ /*
+ * If the filesystem is marked as OK for use by in-development
+ * filesystem code, but ext4dev is not supported, and ext4 is,
+ * then don't call ourselves ext4dev, since we should be
+ * detected as ext4 in that case.
+ *
+ * If the filesystem is marked as in use by production
+ * filesystem, then it can only be used by ext4 and NOT by
+ * ext4dev, so always disclaim we are ext4dev in that case.
+ */
+ if (blkid_le32(es->s_flags) & EXT2_FLAGS_TEST_FILESYS) {
+ if (!system_supports_ext4dev() && system_supports_ext4())
+ return -BLKID_ERR_PARAM;
+ } else
+ return -BLKID_ERR_PARAM;
+
+force_ext4dev:
+ get_ext2_info(probe->dev, id, buf);
+ return 0;
+}
+static int probe_ext4(struct blkid_probe *probe, struct blkid_magic *id,
+ unsigned char *buf)
+{
+ struct ext2_super_block *es;
es = (struct ext2_super_block *)buf;
- /* Distinguish between jbd and ext2/3 fs */
- if (blkid_le32(es->s_feature_incompat) &
+ /* Distinguish from jbd */
+ if (blkid_le32(es->s_feature_incompat) &
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
return -BLKID_ERR_PARAM;
- /* Distinguish between ext3 and ext2 */
+ /*
+ * If the filesystem does not have a journal and ext2 is not
+ * present, then force this to be detected as an ext2
+ * filesystem.
+ */
if (!(blkid_le32(es->s_feature_compat) &
- EXT3_FEATURE_COMPAT_HAS_JOURNAL))
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
+ !system_supports_ext2() && system_supports_ext4() &&
+ linux_version_code() >= EXT4_SUPPORTS_EXT2)
+ goto force_ext4;
+
+ /* Ext4 has at least one feature which ext3 doesn't understand */
+ if (!(blkid_le32(es->s_feature_ro_compat) &
+ EXT3_FEATURE_RO_COMPAT_UNSUPPORTED) &&
+ !(blkid_le32(es->s_feature_incompat) &
+ EXT3_FEATURE_INCOMPAT_UNSUPPORTED))
return -BLKID_ERR_PARAM;
- get_ext2_info(dev, buf);
+force_ext4:
+ /*
+ * If the filesystem is a OK for use by in-development
+ * filesystem code, and ext4dev is supported or ext4 is not
+ * supported, then don't call ourselves ext4, so we can redo
+ * the detection and mark the filesystem as ext4dev.
+ *
+ * If the filesystem is marked as in use by production
+ * filesystem, then it can only be used by ext4 and NOT by
+ * ext4dev.
+ */
+ if (blkid_le32(es->s_flags) & EXT2_FLAGS_TEST_FILESYS) {
+ if (system_supports_ext4dev() || !system_supports_ext4())
+ return -BLKID_ERR_PARAM;
+ }
+ get_ext2_info(probe->dev, id, buf);
+ return 0;
+}
- blkid_set_tag(dev, "SEC_TYPE", "ext2", sizeof("ext2"));
+static int probe_ext3(struct blkid_probe *probe, struct blkid_magic *id,
+ unsigned char *buf)
+{
+ struct ext2_super_block *es;
+ es = (struct ext2_super_block *)buf;
+
+ /* ext3 requires journal */
+ if (!(blkid_le32(es->s_feature_compat) &
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL))
+ return -BLKID_ERR_PARAM;
+
+ /* Any features which ext3 doesn't understand */
+ if ((blkid_le32(es->s_feature_ro_compat) &
+ EXT3_FEATURE_RO_COMPAT_UNSUPPORTED) ||
+ (blkid_le32(es->s_feature_incompat) &
+ EXT3_FEATURE_INCOMPAT_UNSUPPORTED))
+ return -BLKID_ERR_PARAM;
+ get_ext2_info(probe->dev, id, buf);
return 0;
}
-static int probe_ext2(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf)
+static int probe_ext2(struct blkid_probe *probe, struct blkid_magic *id,
+ unsigned char *buf)
{
struct ext2_super_block *es;
- const char *sec_type = 0, *label = 0;
es = (struct ext2_super_block *)buf;
- /* Distinguish between jbd and ext2/3 fs */
- if (blkid_le32(es->s_feature_incompat) &
- EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
+ /* Distinguish between ext3 and ext2 */
+ if ((blkid_le32(es->s_feature_compat) &
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL))
+ return -BLKID_ERR_PARAM;
+
+ /* Any features which ext2 doesn't understand */
+ if ((blkid_le32(es->s_feature_ro_compat) &
+ EXT2_FEATURE_RO_COMPAT_UNSUPPORTED) ||
+ (blkid_le32(es->s_feature_incompat) &
+ EXT2_FEATURE_INCOMPAT_UNSUPPORTED))
return -BLKID_ERR_PARAM;
- get_ext2_info(dev, buf);
+ /*
+ * If ext2 is not present, but ext4 or ext4dev are, then
+ * disclaim we are ext2
+ */
+ if (!system_supports_ext2() &&
+ (system_supports_ext4() || system_supports_ext4dev()) &&
+ linux_version_code() >= EXT4_SUPPORTS_EXT2)
+ return -BLKID_ERR_PARAM;
+ get_ext2_info(probe->dev, id, buf);
return 0;
}
-static int probe_jbd(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+static int probe_jbd(struct blkid_probe *probe, struct blkid_magic *id,
unsigned char *buf)
{
struct ext2_super_block *es = (struct ext2_super_block *) buf;
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV))
return -BLKID_ERR_PARAM;
- get_ext2_info(dev, buf);
+ get_ext2_info(probe->dev, id, buf);
+
+ return 0;
+}
+
+#define FAT_ATTR_VOLUME_ID 0x08
+#define FAT_ATTR_DIR 0x10
+#define FAT_ATTR_LONG_NAME 0x0f
+#define FAT_ATTR_MASK 0x3f
+#define FAT_ENTRY_FREE 0xe5
+
+static const char *no_name = "NO NAME ";
+
+static unsigned char *search_fat_label(struct vfat_dir_entry *dir, int count)
+{
+ int i;
+
+ for (i = 0; i < count; i++) {
+ if (dir[i].name[0] == 0x00)
+ break;
+ if ((dir[i].name[0] == FAT_ENTRY_FREE) ||
+ (dir[i].cluster_high != 0 || dir[i].cluster_low != 0) ||
+ ((dir[i].attr & FAT_ATTR_MASK) == FAT_ATTR_LONG_NAME))
+ continue;
+
+ if ((dir[i].attr & (FAT_ATTR_VOLUME_ID | FAT_ATTR_DIR)) ==
+ FAT_ATTR_VOLUME_ID) {
+ return dir[i].name;
+ }
+ }
return 0;
}
-static int probe_vfat(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+/* FAT label extraction from the root directory taken from Kay
+ * Sievers's volume_id library */
+static int probe_fat(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf)
{
- struct vfat_super_block *vs;
+ struct vfat_super_block *vs = (struct vfat_super_block *) buf;
+ struct msdos_super_block *ms = (struct msdos_super_block *) buf;
+ struct vfat_dir_entry *dir;
char serno[10];
- const char *label = 0;
- int label_len = 0;
+ const unsigned char *label = 0, *vol_label = 0, *tmp;
+ unsigned char *vol_serno;
+ int label_len = 0, maxloop = 100;
+ __u16 sector_size, dir_entries, reserved;
+ __u32 sect_count, fat_size, dir_size, cluster_count, fat_length;
+ __u32 buf_size, start_data_sect, next, root_start, root_dir_entries;
+
+ /* sector size check */
+ tmp = (unsigned char *)&ms->ms_sector_size;
+ sector_size = tmp[0] + (tmp[1] << 8);
+ if (sector_size != 0x200 && sector_size != 0x400 &&
+ sector_size != 0x800 && sector_size != 0x1000)
+ return 1;
+
+ tmp = (unsigned char *)&ms->ms_dir_entries;
+ dir_entries = tmp[0] + (tmp[1] << 8);
+ reserved = blkid_le16(ms->ms_reserved);
+ tmp = (unsigned char *)&ms->ms_sectors;
+ sect_count = tmp[0] + (tmp[1] << 8);
+ if (sect_count == 0)
+ sect_count = blkid_le32(ms->ms_total_sect);
- vs = (struct vfat_super_block *)buf;
+ fat_length = blkid_le16(ms->ms_fat_length);
+ if (fat_length == 0)
+ fat_length = blkid_le32(vs->vs_fat32_length);
- if (strncmp(vs->vs_label, "NO NAME", 7)) {
- char *end = vs->vs_label + sizeof(vs->vs_label) - 1;
+ fat_size = fat_length * ms->ms_fats;
+ dir_size = ((dir_entries * sizeof(struct vfat_dir_entry)) +
+ (sector_size-1)) / sector_size;
- while (*end == ' ' && end >= vs->vs_label)
- --end;
- if (end >= vs->vs_label) {
- label = vs->vs_label;
- label_len = end - vs->vs_label + 1;
+ cluster_count = sect_count - (reserved + fat_size + dir_size);
+ if (ms->ms_cluster_size == 0)
+ return 1;
+ cluster_count /= ms->ms_cluster_size;
+
+ if (cluster_count > FAT32_MAX)
+ return 1;
+
+ if (ms->ms_fat_length) {
+ /* the label may be an attribute in the root directory */
+ root_start = (reserved + fat_size) * sector_size;
+ root_dir_entries = vs->vs_dir_entries[0] +
+ (vs->vs_dir_entries[1] << 8);
+
+ buf_size = root_dir_entries * sizeof(struct vfat_dir_entry);
+ dir = (struct vfat_dir_entry *) get_buffer(probe, root_start,
+ buf_size);
+ if (dir)
+ vol_label = search_fat_label(dir, root_dir_entries);
+
+ if (!vol_label || !memcmp(vol_label, no_name, 11))
+ vol_label = ms->ms_label;
+ vol_serno = ms->ms_serno;
+
+ blkid_set_tag(probe->dev, "SEC_TYPE", "msdos",
+ sizeof("msdos"));
+ } else {
+ /* Search the FAT32 root dir for the label attribute */
+ buf_size = vs->vs_cluster_size * sector_size;
+ start_data_sect = reserved + fat_size;
+
+ next = blkid_le32(vs->vs_root_cluster);
+ while (next && --maxloop) {
+ __u32 next_sect_off;
+ __u64 next_off, fat_entry_off;
+ int count;
+
+ next_sect_off = (next - 2) * vs->vs_cluster_size;
+ next_off = (start_data_sect + next_sect_off) *
+ sector_size;
+
+ dir = (struct vfat_dir_entry *)
+ get_buffer(probe, next_off, buf_size);
+ if (dir == NULL)
+ break;
+
+ count = buf_size / sizeof(struct vfat_dir_entry);
+
+ vol_label = search_fat_label(dir, count);
+ if (vol_label)
+ break;
+
+ /* get FAT entry */
+ fat_entry_off = (reserved * sector_size) +
+ (next * sizeof(__u32));
+ buf = get_buffer(probe, fat_entry_off, buf_size);
+ if (buf == NULL)
+ break;
+
+ /* set next cluster */
+ next = blkid_le32(*((__u32 *) buf) & 0x0fffffff);
}
+
+ if (!vol_label || !memcmp(vol_label, no_name, 11))
+ vol_label = vs->vs_label;
+ vol_serno = vs->vs_serno;
+ }
+
+ if (vol_label && memcmp(vol_label, no_name, 11)) {
+ if ((label_len = figure_label_len(vol_label, 11)))
+ label = vol_label;
}
/* We can't just print them as %04X, because they are unaligned */
- sprintf(serno, "%02X%02X-%02X%02X", vs->vs_serno[3], vs->vs_serno[2],
- vs->vs_serno[1], vs->vs_serno[0]);
- blkid_set_tag(dev, "LABEL", label, label_len);
- blkid_set_tag(dev, "UUID", serno, sizeof(serno));
+ sprintf(serno, "%02X%02X-%02X%02X", vol_serno[3], vol_serno[2],
+ vol_serno[1], vol_serno[0]);
+
+ blkid_set_tag(probe->dev, "LABEL", (const char *) label, label_len);
+ blkid_set_tag(probe->dev, "UUID", serno, sizeof(serno)-1);
return 0;
}
-static int probe_msdos(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
- unsigned char *buf)
+/*
+ * The FAT filesystem could be without a magic string in superblock
+ * (e.g. old floppies). This heuristic for FAT detection is inspired
+ * by http://vrfy.org/projects/volume_id/ and Linux kernel.
+ * [7-Jul-2005, Karel Zak <kzak@redhat.com>]
+ */
+static int probe_fat_nomagic(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
{
- struct msdos_super_block *ms = (struct msdos_super_block *) buf;
- char serno[10];
- const char *label = 0;
- int label_len = 0;
+ struct msdos_super_block *ms;
+
+ ms = (struct msdos_super_block *)buf;
+
+ /* heads check */
+ if (ms->ms_heads == 0)
+ return 1;
+
+ /* cluster size check*/
+ if (ms->ms_cluster_size == 0 ||
+ (ms->ms_cluster_size & (ms->ms_cluster_size-1)))
+ return 1;
+
+ /* media check */
+ if (ms->ms_media < 0xf8 && ms->ms_media != 0xf0)
+ return 1;
+
+ /* fat counts(Linux kernel expects at least 1 FAT table) */
+ if (!ms->ms_fats)
+ return 1;
+
+ /*
+ * OS/2 and apparently DFSee will place a FAT12/16-like
+ * pseudo-superblock in the first 512 bytes of non-FAT
+ * filesystems --- at least JFS and HPFS, and possibly others.
+ * So we explicitly check for those filesystems at the
+ * FAT12/16 filesystem magic field identifier, and if they are
+ * present, we rule this out as a FAT filesystem, despite the
+ * FAT-like pseudo-header.
+ */
+ if ((memcmp(ms->ms_magic, "JFS ", 8) == 0) ||
+ (memcmp(ms->ms_magic, "HPFS ", 8) == 0))
+ return 1;
+
+ return probe_fat(probe, id, buf);
+}
+
+static int probe_ntfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct ntfs_super_block *ns;
+ struct master_file_table_record *mft;
+ struct file_attribute *attr;
+ char uuid_str[17], label_str[129], *cp;
+ int bytes_per_sector, sectors_per_cluster;
+ int mft_record_size, attr_off, attr_len;
+ unsigned int i, attr_type, val_len;
+ int val_off;
+ __u64 nr_clusters;
+ blkid_loff_t off;
+ unsigned char *buf_mft, *val;
+
+ ns = (struct ntfs_super_block *) buf;
+
+ bytes_per_sector = ns->bios_parameter_block[0] +
+ (ns->bios_parameter_block[1] << 8);
+ sectors_per_cluster = ns->bios_parameter_block[2];
+
+ if ((bytes_per_sector < 512) || (sectors_per_cluster == 0))
+ return 1;
+
+ if (ns->cluster_per_mft_record < 0)
+ mft_record_size = 1 << (0-ns->cluster_per_mft_record);
+ else
+ mft_record_size = ns->cluster_per_mft_record *
+ sectors_per_cluster * bytes_per_sector;
+ nr_clusters = blkid_le64(ns->number_of_sectors) / sectors_per_cluster;
+
+ if ((blkid_le64(ns->mft_cluster_location) > nr_clusters) ||
+ (blkid_le64(ns->mft_mirror_cluster_location) > nr_clusters))
+ return 1;
+
+ off = blkid_le64(ns->mft_mirror_cluster_location) *
+ bytes_per_sector * sectors_per_cluster;
+
+ buf_mft = get_buffer(probe, off, mft_record_size);
+ if (!buf_mft)
+ return 1;
+
+ if (memcmp(buf_mft, "FILE", 4))
+ return 1;
+
+ off = blkid_le64(ns->mft_cluster_location) * bytes_per_sector *
+ sectors_per_cluster;
+
+ buf_mft = get_buffer(probe, off, mft_record_size);
+ if (!buf_mft)
+ return 1;
+
+ if (memcmp(buf_mft, "FILE", 4))
+ return 1;
+
+ off += MFT_RECORD_VOLUME * mft_record_size;
+
+ buf_mft = get_buffer(probe, off, mft_record_size);
+ if (!buf_mft)
+ return 1;
+
+ if (memcmp(buf_mft, "FILE", 4))
+ return 1;
+
+ mft = (struct master_file_table_record *) buf_mft;
- if (strncmp(ms->ms_label, "NO NAME", 7)) {
- char *end = ms->ms_label + sizeof(ms->ms_label) - 1;
+ attr_off = blkid_le16(mft->attrs_offset);
+ label_str[0] = 0;
- while (*end == ' ' && end >= ms->ms_label)
- --end;
- if (end >= ms->ms_label) {
- label = ms->ms_label;
- label_len = end - ms->ms_label + 1;
+ while (1) {
+ attr = (struct file_attribute *) (buf_mft + attr_off);
+ attr_len = blkid_le16(attr->len);
+ attr_type = blkid_le32(attr->type);
+ val_off = blkid_le16(attr->value_offset);
+ val_len = blkid_le32(attr->value_len);
+
+ attr_off += attr_len;
+
+ if ((attr_off > mft_record_size) ||
+ (attr_len == 0))
+ break;
+
+ if (attr_type == MFT_RECORD_ATTR_END)
+ break;
+
+ if (attr_type == MFT_RECORD_ATTR_VOLUME_NAME) {
+ if (val_len > sizeof(label_str))
+ val_len = sizeof(label_str)-1;
+
+ for (i=0, cp=label_str; i < val_len; i+=2,cp++) {
+ val = ((__u8 *) attr) + val_off + i;
+ *cp = val[0];
+ if (val[1])
+ *cp = '?';
+ }
+ *cp = 0;
}
}
- /* We can't just print them as %04X, because they are unaligned */
- sprintf(serno, "%02X%02X-%02X%02X", ms->ms_serno[3], ms->ms_serno[2],
- ms->ms_serno[1], ms->ms_serno[0]);
- blkid_set_tag(dev, "UUID", serno, 0);
- blkid_set_tag(dev, "LABEL", label, label_len);
- blkid_set_tag(dev, "SEC_TYPE", "msdos", sizeof("msdos"));
-
+ sprintf(uuid_str, "%016llX", blkid_le64(ns->volume_serial));
+ blkid_set_tag(probe->dev, "UUID", uuid_str, 0);
+ if (label_str[0])
+ blkid_set_tag(probe->dev, "LABEL", label_str, 0);
return 0;
}
-static int probe_xfs(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+
+static int probe_xfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf)
{
struct xfs_super_block *xs;
if (strlen(xs->xs_fname))
label = xs->xs_fname;
- blkid_set_tag(dev, "LABEL", label, sizeof(xs->xs_fname));
- set_uuid(dev, xs->xs_uuid);
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(xs->xs_fname));
+ set_uuid(probe->dev, xs->xs_uuid, 0);
return 0;
}
-static int probe_reiserfs(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
+static int probe_reiserfs(struct blkid_probe *probe,
struct blkid_magic *id, unsigned char *buf)
{
struct reiserfs_super_block *rs = (struct reiserfs_super_block *) buf;
blocksize = blkid_le16(rs->rs_blocksize);
+ /* The blocksize must be at least 1k */
+ if ((blocksize >> 10) == 0)
+ return -BLKID_ERR_PARAM;
+
/* If the superblock is inside the journal, we have the wrong one */
if (id->bim_kboff/(blocksize>>10) > blkid_le32(rs->rs_journal_block))
return -BLKID_ERR_BIG;
/* LABEL/UUID are only valid for later versions of Reiserfs v3.6. */
- if (!strcmp(id->bim_magic, "ReIsEr2Fs") ||
- !strcmp(id->bim_magic, "ReIsEr3Fs")) {
+ if (id->bim_magic[6] == '2' || id->bim_magic[6] == '3') {
if (strlen(rs->rs_label))
label = rs->rs_label;
- set_uuid(dev, rs->rs_uuid);
+ set_uuid(probe->dev, rs->rs_uuid, 0);
}
- blkid_set_tag(dev, "LABEL", label, sizeof(rs->rs_label));
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(rs->rs_label));
+
+ return 0;
+}
+
+static int probe_reiserfs4(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct reiser4_super_block *rs4 = (struct reiser4_super_block *) buf;
+ const unsigned char *label = 0;
+
+ if (strlen((char *) rs4->rs4_label))
+ label = rs4->rs4_label;
+ set_uuid(probe->dev, rs4->rs4_uuid, 0);
+ blkid_set_tag(probe->dev, "LABEL", (const char *) label,
+ sizeof(rs4->rs4_label));
return 0;
}
-static int probe_jfs(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+static int probe_jfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf)
{
struct jfs_super_block *js;
js = (struct jfs_super_block *)buf;
+ if (blkid_le32(js->js_bsize) != (1 << blkid_le16(js->js_l2bsize)))
+ return 1;
+
+ if (blkid_le32(js->js_pbsize) != (1 << blkid_le16(js->js_l2pbsize)))
+ return 1;
+
+ if ((blkid_le16(js->js_l2bsize) - blkid_le16(js->js_l2pbsize)) !=
+ blkid_le16(js->js_l2bfactor))
+ return 1;
+
if (strlen((char *) js->js_label))
label = (char *) js->js_label;
- blkid_set_tag(dev, "LABEL", label, sizeof(js->js_label));
- set_uuid(dev, js->js_uuid);
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(js->js_label));
+ set_uuid(probe->dev, js->js_uuid, 0);
+ return 0;
+}
+
+static int probe_zfs(struct blkid_probe *probe, struct blkid_magic *id,
+ unsigned char *buf)
+{
+#if 0
+ char *vdev_label;
+ const char *pool_name = 0;
+
+ /* read nvpair data for pool name, pool GUID (complex) */
+ blkid_set_tag(probe->dev, "LABEL", pool_name, sizeof(pool_name));
+ set_uuid(probe->dev, pool_guid, 0);
+#endif
return 0;
}
-static int probe_romfs(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+static int probe_luks(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ char uuid[40];
+
+ /* 168 is the offset to the 40 character uuid:
+ * http://luks.endorphin.org/LUKS-on-disk-format.pdf */
+ strncpy(uuid, (char *) buf+168, 40);
+ blkid_set_tag(probe->dev, "UUID", uuid, sizeof(uuid));
+ return 0;
+}
+
+static int probe_romfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf)
{
struct romfs_super_block *ros;
if (strlen((char *) ros->ros_volume))
label = (char *) ros->ros_volume;
- blkid_set_tag(dev, "LABEL", label, 0);
+ blkid_set_tag(probe->dev, "LABEL", label, 0);
return 0;
}
-static int probe_cramfs(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
- unsigned char *buf)
+static int probe_cramfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
{
struct cramfs_super_block *csb;
const char *label = 0;
if (strlen((char *) csb->name))
label = (char *) csb->name;
- blkid_set_tag(dev, "LABEL", label, 0);
+ blkid_set_tag(probe->dev, "LABEL", label, 0);
return 0;
}
-static int probe_swap0(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
+static int probe_swap0(struct blkid_probe *probe,
struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf __BLKID_ATTR((unused)))
{
- blkid_set_tag(dev, "UUID", 0, 0);
- blkid_set_tag(dev, "LABEL", 0, 0);
+ blkid_set_tag(probe->dev, "UUID", 0, 0);
+ blkid_set_tag(probe->dev, "LABEL", 0, 0);
return 0;
}
-static int probe_swap1(int fd,
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+static int probe_swap1(struct blkid_probe *probe,
+ struct blkid_magic *id,
unsigned char *buf __BLKID_ATTR((unused)))
{
struct swap_id_block *sws;
- const char *label = 0;
- probe_swap0(fd, cache, dev, id, buf);
+ probe_swap0(probe, id, buf);
/*
* Version 1 swap headers are always located at offset of 1024
* bytes, although the swap signature itself is located at the
* end of the page (which may vary depending on hardware
* pagesize).
*/
- if (lseek(fd, 1024, SEEK_SET) < 0) return 1;
- if (!(sws = (struct swap_id_block *)malloc(1024))) return 1;
- if (read(fd, sws, 1024) != 1024) {
- free(sws);
+ sws = (struct swap_id_block *) get_buffer(probe, 1024, 1024);
+ if (!sws)
+ return 1;
+
+ /* check for wrong version or zeroed pagecount, for sanity */
+ if (!memcmp(id->bim_magic, "SWAPSPACE2", id->bim_len) &&
+ (sws->sws_version != 1 || sws->sws_lastpage == 0))
return 1;
- }
/* arbitrary sanity check.. is there any garbage down there? */
if (sws->sws_pad[32] == 0 && sws->sws_pad[33] == 0) {
if (sws->sws_volume[0])
- blkid_set_tag(dev, "LABEL", sws->sws_volume,
+ blkid_set_tag(probe->dev, "LABEL", sws->sws_volume,
sizeof(sws->sws_volume));
if (sws->sws_uuid[0])
- set_uuid(dev, sws->sws_uuid);
+ set_uuid(probe->dev, sws->sws_uuid, 0);
}
- free(sws);
+ return 0;
+}
+
+static int probe_iso9660(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct iso_volume_descriptor *iso;
+ const unsigned char *label;
+
+ iso = (struct iso_volume_descriptor *) buf;
+ label = iso->volume_id;
+ blkid_set_tag(probe->dev, "LABEL", (const char *) label,
+ figure_label_len(label, 32));
return 0;
}
+
static const char
*udf_magic[] = { "BEA01", "BOOT2", "CD001", "CDW02", "NSR02",
"NSR03", "TEA01", 0 };
-static int probe_udf(int fd, blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev __BLKID_ATTR((unused)),
- struct blkid_magic *id __BLKID_ATTR((unused)),
+static int probe_udf(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf __BLKID_ATTR((unused)))
{
int j, bs;
- struct iso_volume_descriptor isosb;
+ struct iso_volume_descriptor *isosb;
const char ** m;
/* determine the block size by scanning in 2K increments
(block sizes larger than 2K will be null padded) */
for (bs = 1; bs < 16; bs++) {
- lseek(fd, bs*2048+32768, SEEK_SET);
- if (read(fd, (char *)&isosb, sizeof(isosb)) != sizeof(isosb))
+ isosb = (struct iso_volume_descriptor *)
+ get_buffer(probe, bs*2048+32768, sizeof(isosb));
+ if (!isosb)
return 1;
- if (isosb.id[0])
+ if (isosb->vd_id[0])
break;
}
/* Scan up to another 64 blocks looking for additional VSD's */
for (j = 1; j < 64; j++) {
if (j > 1) {
- lseek(fd, j*bs*2048+32768, SEEK_SET);
- if (read(fd, (char *)&isosb, sizeof(isosb))
- != sizeof(isosb))
+ isosb = (struct iso_volume_descriptor *)
+ get_buffer(probe, j*bs*2048+32768,
+ sizeof(isosb));
+ if (!isosb)
return 1;
}
/* If we find NSR0x then call it udf:
NSR01 for UDF 1.00
NSR02 for UDF 1.50
NSR03 for UDF 2.00 */
- if (!strncmp(isosb.id, "NSR0", 4))
- return 0;
+ if (!memcmp(isosb->vd_id, "NSR0", 4))
+ return probe_iso9660(probe, id, buf);
for (m = udf_magic; *m; m++)
- if (!strncmp(*m, isosb.id, 5))
+ if (!memcmp(*m, isosb->vd_id, 5))
break;
if (*m == 0)
return 1;
return 1;
}
-static int probe_ocfs(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+static int probe_ocfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf)
{
struct ocfs_volume_header ovh;
major = ocfsmajor(ovh);
if (major == 1)
- blkid_set_tag(dev,"SEC_TYPE","ocfs1",sizeof("ocfs1"));
+ blkid_set_tag(probe->dev,"SEC_TYPE","ocfs1",sizeof("ocfs1"));
else if (major >= 9)
- blkid_set_tag(dev,"SEC_TYPE","ntocfs",sizeof("ntocfs"));
-
- blkid_set_tag(dev, "LABEL", ovl.label, ocfslabellen(ovl));
- blkid_set_tag(dev, "MOUNT", ovh.mount, ocfsmountlen(ovh));
- set_uuid(dev, ovl.vol_id);
+ blkid_set_tag(probe->dev,"SEC_TYPE","ntocfs",sizeof("ntocfs"));
+
+ blkid_set_tag(probe->dev, "LABEL", ovl.label, ocfslabellen(ovl));
+ blkid_set_tag(probe->dev, "MOUNT", ovh.mount, ocfsmountlen(ovh));
+ set_uuid(probe->dev, ovl.vol_id, 0);
return 0;
}
-static int probe_ocfs2(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+static int probe_ocfs2(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf)
{
struct ocfs2_super_block *osb;
osb = (struct ocfs2_super_block *)buf;
- blkid_set_tag(dev, "LABEL", osb->s_label, sizeof(osb->s_label));
- set_uuid(dev, osb->s_uuid);
+ blkid_set_tag(probe->dev, "LABEL", osb->s_label, sizeof(osb->s_label));
+ set_uuid(probe->dev, osb->s_uuid, 0);
return 0;
}
-static int probe_oracleasm(int fd __BLKID_ATTR((unused)),
- blkid_cache cache __BLKID_ATTR((unused)),
- blkid_dev dev,
- struct blkid_magic *id __BLKID_ATTR((unused)),
+static int probe_oracleasm(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
unsigned char *buf)
{
struct oracle_asm_disk_label *dl;
dl = (struct oracle_asm_disk_label *)buf;
- blkid_set_tag(dev, "LABEL", dl->dl_id, sizeof(dl->dl_id));
+ blkid_set_tag(probe->dev, "LABEL", dl->dl_id, sizeof(dl->dl_id));
return 0;
}
-/*
- * BLKID_BLK_OFFS is at least as large as the highest bim_kboff defined
- * in the type_array table below + bim_kbalign.
- *
- * When probing for a lot of magics, we handle everything in 1kB buffers so
- * that we don't have to worry about reading each combination of block sizes.
- */
-#define BLKID_BLK_OFFS 64 /* currently reiserfs */
+static int probe_gfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct gfs2_sb *sbd;
+ const char *label = 0;
+
+ sbd = (struct gfs2_sb *)buf;
+
+ if (blkid_be32(sbd->sb_fs_format) == GFS_FORMAT_FS &&
+ blkid_be32(sbd->sb_multihost_format) == GFS_FORMAT_MULTI)
+ {
+ blkid_set_tag(probe->dev, "UUID", 0, 0);
+
+ if (strlen(sbd->sb_locktable))
+ label = sbd->sb_locktable;
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(sbd->sb_locktable));
+ return 0;
+ }
+ return 1;
+}
+
+static int probe_gfs2(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct gfs2_sb *sbd;
+ const char *label = 0;
+
+ sbd = (struct gfs2_sb *)buf;
+
+ if (blkid_be32(sbd->sb_fs_format) == GFS2_FORMAT_FS &&
+ blkid_be32(sbd->sb_multihost_format) == GFS2_FORMAT_MULTI)
+ {
+ blkid_set_tag(probe->dev, "UUID", 0, 0);
+
+ if (strlen(sbd->sb_locktable))
+ label = sbd->sb_locktable;
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(sbd->sb_locktable));
+ return 0;
+ }
+ return 1;
+}
+
+static void unicode_16be_to_utf8(unsigned char *str, int out_len,
+ const unsigned char *buf, int in_len)
+{
+ int i, j;
+ unsigned int c;
+ for (i = j = 0; i + 2 <= in_len; i += 2) {
+ c = (buf[i] << 8) | buf[i+1];
+ if (c == 0) {
+ str[j] = '\0';
+ break;
+ } else if (c < 0x80) {
+ if (j+1 >= out_len)
+ break;
+ str[j++] = (unsigned char) c;
+ } else if (c < 0x800) {
+ if (j+2 >= out_len)
+ break;
+ str[j++] = (unsigned char) (0xc0 | (c >> 6));
+ str[j++] = (unsigned char) (0x80 | (c & 0x3f));
+ } else {
+ if (j+3 >= out_len)
+ break;
+ str[j++] = (unsigned char) (0xe0 | (c >> 12));
+ str[j++] = (unsigned char) (0x80 | ((c >> 6) & 0x3f));
+ str[j++] = (unsigned char) (0x80 | (c & 0x3f));
+ }
+ }
+ str[j] = '\0';
+}
+
+static int probe_hfs(struct blkid_probe *probe __BLKID_ATTR((unused)),
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct hfs_mdb *hfs = (struct hfs_mdb *) buf;
+ char uuid_str[17];
+ __u64 uuid;
+
+ if ((memcmp(hfs->embed_sig, "H+", 2) == 0) ||
+ (memcmp(hfs->embed_sig, "HX", 2) == 0))
+ return 1; /* Not hfs, but an embedded HFS+ */
+
+ uuid = blkid_le64(*((unsigned long long *) hfs->finder_info.id));
+ if (uuid) {
+ sprintf(uuid_str, "%016llX", uuid);
+ blkid_set_tag(probe->dev, "UUID", uuid_str, 0);
+ }
+ blkid_set_tag(probe->dev, "LABEL", hfs->label, hfs->label_len);
+ return 0;
+}
+
+
+static int probe_hfsplus(struct blkid_probe *probe,
+ struct blkid_magic *id,
+ unsigned char *buf)
+{
+ struct hfsplus_extent extents[HFSPLUS_EXTENT_COUNT];
+ struct hfsplus_bnode_descriptor *descr;
+ struct hfsplus_bheader_record *bnode;
+ struct hfsplus_catalog_key *key;
+ struct hfsplus_vol_header *hfsplus;
+ struct hfs_mdb *sbd = (struct hfs_mdb *) buf;
+ unsigned int alloc_block_size;
+ unsigned int alloc_first_block;
+ unsigned int embed_first_block;
+ unsigned int off = 0;
+ unsigned int blocksize;
+ unsigned int cat_block;
+ unsigned int ext_block_start;
+ unsigned int ext_block_count;
+ unsigned int record_count;
+ unsigned int leaf_node_head;
+ unsigned int leaf_node_count;
+ unsigned int leaf_node_size;
+ unsigned int leaf_block;
+ unsigned int label_len;
+ int ext;
+ __u64 leaf_off, uuid;
+ char uuid_str[17], label[512];
+
+ /* Check for a HFS+ volume embedded in a HFS volume */
+ if (memcmp(sbd->signature, "BD", 2) == 0) {
+ if ((memcmp(sbd->embed_sig, "H+", 2) != 0) &&
+ (memcmp(sbd->embed_sig, "HX", 2) != 0))
+ /* This must be an HFS volume, so fail */
+ return 1;
+
+ alloc_block_size = blkid_be32(sbd->al_blk_size);
+ alloc_first_block = blkid_be16(sbd->al_bl_st);
+ embed_first_block = blkid_be16(sbd->embed_startblock);
+ off = (alloc_first_block * 512) +
+ (embed_first_block * alloc_block_size);
+ buf = get_buffer(probe, off + (id->bim_kboff * 1024),
+ sizeof(sbd));
+ if (!buf)
+ return 1;
+
+ hfsplus = (struct hfsplus_vol_header *) buf;
+ }
+
+ hfsplus = (struct hfsplus_vol_header *) buf;
+
+ if ((memcmp(hfsplus->signature, "H+", 2) != 0) &&
+ (memcmp(hfsplus->signature, "HX", 2) != 0))
+ return 1;
+
+ uuid = blkid_le64(*((unsigned long long *) hfsplus->finder_info.id));
+ if (uuid) {
+ sprintf(uuid_str, "%016llX", uuid);
+ blkid_set_tag(probe->dev, "UUID", uuid_str, 0);
+ }
+
+ blocksize = blkid_be32(hfsplus->blocksize);
+ memcpy(extents, hfsplus->cat_file.extents, sizeof(extents));
+ cat_block = blkid_be32(extents[0].start_block);
+
+ buf = get_buffer(probe, off + (cat_block * blocksize), 0x2000);
+ if (!buf)
+ return 0;
+
+ bnode = (struct hfsplus_bheader_record *)
+ &buf[sizeof(struct hfsplus_bnode_descriptor)];
+
+ leaf_node_head = blkid_be32(bnode->leaf_head);
+ leaf_node_size = blkid_be16(bnode->node_size);
+ leaf_node_count = blkid_be32(bnode->leaf_count);
+ if (leaf_node_count == 0)
+ return 0;
+
+ leaf_block = (leaf_node_head * leaf_node_size) / blocksize;
+
+ /* get physical location */
+ for (ext = 0; ext < HFSPLUS_EXTENT_COUNT; ext++) {
+ ext_block_start = blkid_be32(extents[ext].start_block);
+ ext_block_count = blkid_be32(extents[ext].block_count);
+ if (ext_block_count == 0)
+ return 0;
+
+ /* this is our extent */
+ if (leaf_block < ext_block_count)
+ break;
+
+ leaf_block -= ext_block_count;
+ }
+ if (ext == HFSPLUS_EXTENT_COUNT)
+ return 0;
+
+ leaf_off = (ext_block_start + leaf_block) * blocksize;
+
+ buf = get_buffer(probe, off + leaf_off, leaf_node_size);
+ if (!buf)
+ return 0;
+
+ descr = (struct hfsplus_bnode_descriptor *) buf;
+ record_count = blkid_be16(descr->num_recs);
+ if (record_count == 0)
+ return 0;
+
+ if (descr->type != HFS_NODE_LEAF)
+ return 0;
+
+ key = (struct hfsplus_catalog_key *)
+ &buf[sizeof(struct hfsplus_bnode_descriptor)];
+
+ if (blkid_be32(key->parent_id) != HFSPLUS_POR_CNID)
+ return 0;
+
+ label_len = blkid_be16(key->unicode_len) * 2;
+ unicode_16be_to_utf8(label, sizeof(label), key->unicode, label_len);
+ blkid_set_tag(probe->dev, "LABEL", label, 0);
+ return 0;
+}
+
+#define LVM2_LABEL_SIZE 512
+static unsigned int lvm2_calc_crc(const void *buf, unsigned int size)
+{
+ static const unsigned int crctab[] = {
+ 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
+ 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
+ 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
+ 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
+ };
+ unsigned int i, crc = 0xf597a6cf;
+ const __u8 *data = (const __u8 *) buf;
+
+ for (i = 0; i < size; i++) {
+ crc ^= *data++;
+ crc = (crc >> 4) ^ crctab[crc & 0xf];
+ crc = (crc >> 4) ^ crctab[crc & 0xf];
+ }
+ return crc;
+}
+
+static int probe_lvm2(struct blkid_probe *probe,
+ struct blkid_magic *id,
+ unsigned char *buf)
+{
+ int sector = (id->bim_kboff) << 1;
+ struct lvm2_pv_label_header *label= (struct lvm2_pv_label_header *)buf;
+ char *p, *q, uuid[40];
+ unsigned int i, b;
+
+ /* buf is at 0k or 1k offset; find label inside */
+ if (memcmp(buf, "LABELONE", 8) == 0) {
+ label = (struct lvm2_pv_label_header *)buf;
+ } else if (memcmp(buf + 512, "LABELONE", 8) == 0) {
+ label = (struct lvm2_pv_label_header *)(buf + 512);
+ sector++;
+ } else {
+ return 1;
+ }
+
+ if (blkid_le64(label->sector_xl) != (unsigned) sector) {
+ DBG(DEBUG_PROBE,
+ printf("LVM2: label for sector %llu found at sector %d\n",
+ blkid_le64(label->sector_xl), sector));
+ return 1;
+ }
+
+ if (lvm2_calc_crc(&label->offset_xl, LVM2_LABEL_SIZE -
+ ((char *)&label->offset_xl - (char *)label)) !=
+ blkid_le32(label->crc_xl)) {
+ DBG(DEBUG_PROBE,
+ printf("LVM2: label checksum incorrect at sector %d\n",
+ sector));
+ return 1;
+ }
+
+ for (i=0, b=1, p=uuid, q= (char *) label->pv_uuid; i <= 32;
+ i++, b <<= 1) {
+ if (b & 0x4444440)
+ *p++ = '-';
+ *p++ = *q++;
+ }
+
+ blkid_set_tag(probe->dev, "UUID", uuid, LVM2_ID_LEN+6);
+
+ return 0;
+}
+
+static int probe_btrfs(struct blkid_probe *probe,
+ struct blkid_magic *id,
+ unsigned char *buf)
+{
+ struct btrfs_super_block *bs;
+ const char *label = 0;
+
+ bs = (struct btrfs_super_block *)buf;
+
+ if (strlen(bs->label))
+ label = bs->label;
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(bs->label));
+ set_uuid(probe->dev, bs->fsid, 0);
+ return 0;
+}
/*
* Various filesystem magics that we can check for. Note that kboff and
* sboff are in kilobytes and bytes respectively. All magics are in
static struct blkid_magic type_array[] = {
/* type kboff sboff len magic probe */
{ "oracleasm", 0, 32, 8, "ORCLDISK", probe_oracleasm },
- { "ntfs", 0, 3, 8, "NTFS ", 0 },
+ { "ntfs", 0, 3, 8, "NTFS ", probe_ntfs },
{ "jbd", 1, 0x38, 2, "\123\357", probe_jbd },
+ { "ext4dev", 1, 0x38, 2, "\123\357", probe_ext4dev },
+ { "ext4", 1, 0x38, 2, "\123\357", probe_ext4 },
{ "ext3", 1, 0x38, 2, "\123\357", probe_ext3 },
{ "ext2", 1, 0x38, 2, "\123\357", probe_ext2 },
{ "reiserfs", 8, 0x34, 8, "ReIsErFs", probe_reiserfs },
{ "reiserfs", 64, 0x34, 9, "ReIsEr3Fs", probe_reiserfs },
{ "reiserfs", 64, 0x34, 8, "ReIsErFs", probe_reiserfs },
{ "reiserfs", 8, 20, 8, "ReIsErFs", probe_reiserfs },
- { "vfat", 0, 0x52, 5, "MSWIN", probe_vfat },
- { "vfat", 0, 0x52, 8, "FAT32 ", probe_vfat },
- { "vfat", 0, 0x36, 5, "MSDOS", probe_msdos },
- { "vfat", 0, 0x36, 8, "FAT16 ", probe_msdos },
- { "vfat", 0, 0x36, 8, "FAT12 ", probe_msdos },
+ { "reiser4", 64, 0, 7, "ReIsEr4", probe_reiserfs4 },
+ { "gfs2", 64, 0, 4, "\x01\x16\x19\x70", probe_gfs2 },
+ { "gfs", 64, 0, 4, "\x01\x16\x19\x70", probe_gfs },
+ { "vfat", 0, 0x52, 5, "MSWIN", probe_fat },
+ { "vfat", 0, 0x52, 8, "FAT32 ", probe_fat },
+ { "vfat", 0, 0x36, 5, "MSDOS", probe_fat },
+ { "vfat", 0, 0x36, 8, "FAT16 ", probe_fat },
+ { "vfat", 0, 0x36, 8, "FAT12 ", probe_fat },
+ { "vfat", 0, 0, 1, "\353", probe_fat_nomagic },
+ { "vfat", 0, 0, 1, "\351", probe_fat_nomagic },
+ { "vfat", 0, 0x1fe, 2, "\125\252", probe_fat_nomagic },
{ "minix", 1, 0x10, 2, "\177\023", 0 },
{ "minix", 1, 0x10, 2, "\217\023", 0 },
{ "minix", 1, 0x10, 2, "\150\044", 0 },
{ "udf", 32, 1, 5, "NSR02", probe_udf },
{ "udf", 32, 1, 5, "NSR03", probe_udf },
{ "udf", 32, 1, 5, "TEA01", probe_udf },
- { "iso9660", 32, 1, 5, "CD001", 0 },
- { "iso9660", 32, 9, 5, "CDROM", 0 },
+ { "iso9660", 32, 1, 5, "CD001", probe_iso9660 },
+ { "iso9660", 32, 9, 5, "CDROM", probe_iso9660 },
{ "jfs", 32, 0, 4, "JFS1", probe_jfs },
- { "hfs", 1, 0, 2, "BD", 0 },
+ { "zfs", 8, 0, 8, "\0\0\x02\xf5\xb0\x07\xb1\x0c", probe_zfs },
+ { "zfs", 8, 0, 8, "\x0c\xb1\x07\xb0\xf5\x02\0\0", probe_zfs },
+ { "zfs", 264, 0, 8, "\0\0\x02\xf5\xb0\x07\xb1\x0c", probe_zfs },
+ { "zfs", 264, 0, 8, "\x0c\xb1\x07\xb0\xf5\x02\0\0", probe_zfs },
+ { "hfsplus", 1, 0, 2, "BD", probe_hfsplus },
+ { "hfsplus", 1, 0, 2, "H+", probe_hfsplus },
+ { "hfsplus", 1, 0, 2, "HX", probe_hfsplus },
+ { "hfs", 1, 0, 2, "BD", probe_hfs },
{ "ufs", 8, 0x55c, 4, "T\031\001\000", 0 },
{ "hpfs", 8, 0, 4, "I\350\225\371", 0 },
{ "sysv", 0, 0x3f8, 4, "\020~\030\375", 0 },
{ "swap", 0, 0xff6, 10, "SWAP-SPACE", probe_swap0 },
{ "swap", 0, 0xff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swsuspend", 0, 0xff6, 9, "S1SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0xff6, 9, "S2SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0xff6, 9, "ULSUSPEND", probe_swap1 },
{ "swap", 0, 0x1ff6, 10, "SWAP-SPACE", probe_swap0 },
{ "swap", 0, 0x1ff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swsuspend", 0, 0x1ff6, 9, "S1SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0x1ff6, 9, "S2SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0x1ff6, 9, "ULSUSPEND", probe_swap1 },
{ "swap", 0, 0x3ff6, 10, "SWAP-SPACE", probe_swap0 },
{ "swap", 0, 0x3ff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swsuspend", 0, 0x3ff6, 9, "S1SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0x3ff6, 9, "S2SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0x3ff6, 9, "ULSUSPEND", probe_swap1 },
{ "swap", 0, 0x7ff6, 10, "SWAP-SPACE", probe_swap0 },
{ "swap", 0, 0x7ff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swsuspend", 0, 0x7ff6, 9, "S1SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0x7ff6, 9, "S2SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0x7ff6, 9, "ULSUSPEND", probe_swap1 },
{ "swap", 0, 0xfff6, 10, "SWAP-SPACE", probe_swap0 },
{ "swap", 0, 0xfff6, 10, "SWAPSPACE2", probe_swap1 },
+ { "swsuspend", 0, 0xfff6, 9, "S1SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0xfff6, 9, "S2SUSPEND", probe_swap1 },
+ { "swsuspend", 0, 0xfff6, 9, "ULSUSPEND", probe_swap1 },
{ "ocfs", 0, 8, 9, "OracleCFS", probe_ocfs },
{ "ocfs2", 1, 0, 6, "OCFSV2", probe_ocfs2 },
{ "ocfs2", 2, 0, 6, "OCFSV2", probe_ocfs2 },
{ "ocfs2", 4, 0, 6, "OCFSV2", probe_ocfs2 },
{ "ocfs2", 8, 0, 6, "OCFSV2", probe_ocfs2 },
+ { "crypt_LUKS", 0, 0, 6, "LUKS\xba\xbe", probe_luks },
+ { "squashfs", 0, 0, 4, "sqsh", 0 },
+ { "squashfs", 0, 0, 4, "hsqs", 0 },
+ { "lvm2pv", 0, 0x218, 8, "LVM2 001", probe_lvm2 },
+ { "lvm2pv", 0, 0x018, 8, "LVM2 001", probe_lvm2 },
+ { "lvm2pv", 1, 0x018, 8, "LVM2 001", probe_lvm2 },
+ { "lvm2pv", 1, 0x218, 8, "LVM2 001", probe_lvm2 },
+ { "btrfs", 64, 0x40, 8, "_BHRfS_M", probe_btrfs },
{ NULL, 0, 0, 0, NULL, NULL }
};
blkid_dev blkid_verify(blkid_cache cache, blkid_dev dev)
{
struct blkid_magic *id;
- unsigned char *bufs[BLKID_BLK_OFFS + 1], *buf;
- const char *type;
+ struct blkid_probe probe;
+ blkid_tag_iterate iter;
+ unsigned char *buf;
+ const char *type, *value;
struct stat st;
time_t diff, now;
- int fd, idx;
+ int idx;
if (!dev)
return NULL;
now = time(0);
diff = now - dev->bid_time;
- if ((now < dev->bid_time) ||
- (diff < BLKID_PROBE_MIN) ||
- (dev->bid_flags & BLKID_BID_FL_VERIFIED &&
- diff < BLKID_PROBE_INTERVAL))
- return dev;
-
- DBG(DEBUG_PROBE,
- printf("need to revalidate %s (time since last check %lu)\n",
- dev->bid_name, diff));
-
- if (((fd = open(dev->bid_name, O_RDONLY)) < 0) ||
- (fstat(fd, &st) < 0)) {
- if (errno == ENXIO || errno == ENODEV || errno == ENOENT) {
- blkid_free_dev(dev);
- return NULL;
- }
- /* We don't have read permission, just return cache data. */
+ if (stat(dev->bid_name, &st) < 0) {
DBG(DEBUG_PROBE,
- printf("returning unverified data for %s\n",
+ printf("blkid_verify: error %s (%d) while "
+ "trying to stat %s\n", strerror(errno), errno,
dev->bid_name));
+ open_err:
+ if ((errno == EPERM) || (errno == EACCES) || (errno == ENOENT)) {
+ /* We don't have read permission, just return cache data. */
+ DBG(DEBUG_PROBE, printf("returning unverified data for %s\n",
+ dev->bid_name));
+ return dev;
+ }
+ blkid_free_dev(dev);
+ return NULL;
+ }
+
+ if ((now >= dev->bid_time) &&
+ (st.st_mtime <= dev->bid_time) &&
+ ((diff < BLKID_PROBE_MIN) ||
+ (dev->bid_flags & BLKID_BID_FL_VERIFIED &&
+ diff < BLKID_PROBE_INTERVAL)))
return dev;
+
+ DBG(DEBUG_PROBE,
+ printf("need to revalidate %s (cache time %lu, stat time %lu,\n\t"
+ "time since last check %lu)\n",
+ dev->bid_name, (unsigned long)dev->bid_time,
+ (unsigned long)st.st_mtime, (unsigned long)diff));
+
+ if ((probe.fd = open(dev->bid_name, O_RDONLY)) < 0) {
+ DBG(DEBUG_PROBE, printf("blkid_verify: error %s (%d) while "
+ "opening %s\n", strerror(errno), errno,
+ dev->bid_name));
+ goto open_err;
}
- memset(bufs, 0, sizeof(bufs));
-
+ probe.cache = cache;
+ probe.dev = dev;
+ probe.sbbuf = 0;
+ probe.buf = 0;
+ probe.buf_max = 0;
+
/*
* Iterate over the type array. If we already know the type,
* then try that first. If it doesn't work, then blow away
* the type information, and try again.
- *
+ *
*/
try_again:
type = 0;
if (!dev->bid_type || !strcmp(dev->bid_type, "mdraid")) {
uuid_t uuid;
- if (check_mdraid(fd, uuid) == 0) {
- set_uuid(dev, uuid);
+ if (check_mdraid(probe.fd, uuid) == 0) {
+ set_uuid(dev, uuid, 0);
type = "mdraid";
goto found_type;
}
continue;
idx = id->bim_kboff + (id->bim_sboff >> 10);
- if (idx > BLKID_BLK_OFFS || idx < 0)
+ buf = get_buffer(&probe, idx << 10, 1024);
+ if (!buf)
continue;
- buf = bufs[idx];
- if (!buf) {
- if (lseek(fd, idx << 10, SEEK_SET) < 0)
- continue;
-
- if (!(buf = (unsigned char *)malloc(1024)))
- continue;
-
- if (read(fd, buf, 1024) != 1024) {
- free(buf);
- continue;
- }
- bufs[idx] = buf;
- }
- if (memcmp(id->bim_magic, buf + (id->bim_sboff&0x3ff),
+ if (memcmp(id->bim_magic, buf + (id->bim_sboff & 0x3ff),
id->bim_len))
continue;
if ((id->bim_probe == NULL) ||
- (id->bim_probe(fd, cache, dev, id, buf) == 0)) {
+ (id->bim_probe(&probe, id, buf) == 0)) {
type = id->bim_type;
goto found_type;
}
if (!id->bim_type && dev->bid_type) {
/*
- * Zap the device filesystem type and try again
+ * Zap the device filesystem information and try again
*/
- blkid_set_tag(dev, "TYPE", 0, 0);
- blkid_set_tag(dev, "SEC_TYPE", 0, 0);
- blkid_set_tag(dev, "LABEL", 0, 0);
- blkid_set_tag(dev, "UUID", 0, 0);
+ DBG(DEBUG_PROBE,
+ printf("previous fs type %s not valid, "
+ "trying full probe\n", dev->bid_type));
+ iter = blkid_tag_iterate_begin(dev);
+ while (blkid_tag_next(iter, &type, &value) == 0)
+ blkid_set_tag(dev, type, 0, 0);
+ blkid_tag_iterate_end(iter);
goto try_again;
}
if (!dev->bid_type) {
blkid_free_dev(dev);
- return NULL;
+ dev = 0;
+ goto found_type;
}
-
+
found_type:
if (dev && type) {
dev->bid_devno = st.st_rdev;
cache->bic_flags |= BLKID_BIC_FL_CHANGED;
blkid_set_tag(dev, "TYPE", type, 0);
-
- DBG(DEBUG_PROBE, printf("%s: devno 0x%04Lx, type %s\n",
- dev->bid_name, st.st_rdev, type));
+
+ DBG(DEBUG_PROBE, printf("%s: devno 0x%04llx, type %s\n",
+ dev->bid_name, (long long)st.st_rdev, type));
}
- close(fd);
+ free(probe.sbbuf);
+ free(probe.buf);
+ if (probe.fd >= 0)
+ close(probe.fd);
return dev;
}
blkid_cache cache;
int ret;
- blkid_debug_mask = DEBUG_ALL;
if (argc != 2) {
fprintf(stderr, "Usage: %s device\n"
"Probe a single device to determine type\n", argv[0]);
printf("%s: %s has an unsupported type\n", argv[0], argv[1]);
return (1);
}
- printf("%s is type %s\n", argv[1], dev->bid_type ?
- dev->bid_type : "(null)");
+ printf("TYPE='%s'\n", dev->bid_type ? dev->bid_type : "(null)");
if (dev->bid_label)
- printf("\tlabel is '%s'\n", dev->bid_label);
+ printf("LABEL='%s'\n", dev->bid_label);
if (dev->bid_uuid)
- printf("\tuuid is %s\n", dev->bid_uuid);
-
+ printf("UUID='%s'\n", dev->bid_uuid);
+
blkid_free_dev(dev);
return (0);
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff