* 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
#ifdef HAVE_SYS_MKDEV_H
#include <sys/mkdev.h>
#endif
+#include <sys/utsname.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include "uuid/uuid.h"
#include "probe.h"
-/* #define DEBUG_PROBE */
-#ifdef DEBUG_PROBE
-#define DBG(x) x
-#else
-#define DBG(x)
-#endif
+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
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, char *tag)
{
char str[37];
if (!uuid_is_null(uuid)) {
uuid_unparse(uuid, str);
- blkid_set_tag(dev, "UUID", str, sizeof(str), 1);
+ blkid_set_tag(dev, tag ? tag : "UUID", str, sizeof(str));
}
}
-static int probe_ext2(int fd, blkid_cache cache, blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf,
- const char **ret_sectype)
+static void get_ext2_info(blkid_dev dev, struct blkid_magic *id,
+ unsigned char *buf)
{
- struct ext2_super_block *es;
-
- es = (struct ext2_super_block *)buf;
+ struct ext2_super_block *es = (struct ext2_super_block *) buf;
+ const char *label = 0;
- DBG(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)));
- /* Make sure we don't keep re-probing as ext2 for a journaled fs */
- if (!strcmp(id->bim_type, "ext2") &&
- ((blkid_le32(es->s_feature_compat) &
- EXT3_FEATURE_COMPAT_HAS_JOURNAL) ||
- (blkid_le32(es->s_feature_incompat) &
- EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)))
+ if (strlen(es->s_volume_name))
+ label = es->s_volume_name;
+ blkid_set_tag(dev, "LABEL", label, sizeof(es->s_volume_name));
+
+ 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"));
+}
+
+/*
+ * Check to see if a filesystem is in /proc/filesystems.
+ * Returns 1 if found, 0 if not
+ */
+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
+ */
+int check_for_modules(const char *fs_name)
+{
+ struct utsname uts;
+ FILE *f;
+ char buf[1024], *cp, *t;
+ int i;
+
+ if (uname(&uts))
+ return (0);
+ snprintf(buf, sizeof(buf), "/lib/modules/%s/modules.dep", uts.release);
+
+ f = fopen(buf, "r");
+ if (!f)
+ return (0);
+ 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++;
+ i = strlen(cp);
+ if (i > 3) {
+ t = cp + i - 3;
+ if (!strcmp(t, ".ko"))
+ *t = 0;
+ }
+ if (!strcmp(cp, fs_name))
+ return (1);
+ }
+ fclose(f);
+ return (0);
+}
+
+static int system_supports_ext4()
+{
+ static time_t last_check = 0;
+ static int ret = -1;
+ time_t now = time(0);
+
+ if (ret != -1 || (last_check - now) < 5)
+ return ret;
+ last_check = now;
+ ret = (fs_proc_check("ext4") || check_for_modules("ext4"));
+ return ret;
+}
+
+static int system_supports_ext4dev()
+{
+ static time_t last_check = 0;
+ static int ret = -1;
+ time_t now = time(0);
+
+ if (ret != -1 || (last_check - now) < 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 (strlen(es->s_volume_name))
- blkid_set_tag(dev, "LABEL", es->s_volume_name,
- sizeof(es->s_volume_name), 1);
+ /* ext4dev requires a journal */
+ if (!(blkid_le32(es->s_feature_compat) &
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL))
+ return -BLKID_ERR_PARAM;
- set_uuid(dev, es->s_uuid);
+ /*
+ * 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;
+ get_ext2_info(probe->dev, id, buf);
return 0;
}
-static int probe_jbd(int fd, blkid_cache cache, blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf,
- const char **ret_sectype)
+static int probe_ext4(struct blkid_probe *probe, struct blkid_magic *id,
+ unsigned char *buf)
{
- struct ext2_super_block *es = (struct ext2_super_block *) buf;
+ struct ext2_super_block *es;
+ es = (struct ext2_super_block *)buf;
- if (!(blkid_le32(es->s_feature_incompat) &
- EXT3_FEATURE_INCOMPAT_JOURNAL_DEV))
+ /* Distinguish from jbd */
+ if (blkid_le32(es->s_feature_incompat) &
+ EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)
+ return -BLKID_ERR_PARAM;
+
+ /* ext4 requires journal */
+ if (!(blkid_le32(es->s_feature_compat) &
+ EXT3_FEATURE_COMPAT_HAS_JOURNAL))
return -BLKID_ERR_PARAM;
- return (probe_ext2(fd, cache, dev, id, buf, ret_sectype));
+ /* 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;
+
+ /*
+ * 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;
}
-static int probe_ext3(int fd, blkid_cache cache, blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf,
- const char **ret_sectype)
+static int probe_ext3(struct blkid_probe *probe, struct blkid_magic *id,
+ unsigned char *buf)
{
- struct ext2_super_block *es = (struct ext2_super_block *) buf;
- int ret;
+ struct ext2_super_block *es;
+ es = (struct ext2_super_block *)buf;
+
+ /* Distinguish from ext4dev */
+ if (blkid_le32(es->s_flags) & EXT2_FLAGS_TEST_FILESYS)
+ return -BLKID_ERR_PARAM;
+ /* ext3 requires journal */
if (!(blkid_le32(es->s_feature_compat) &
EXT3_FEATURE_COMPAT_HAS_JOURNAL))
return -BLKID_ERR_PARAM;
- if ((ret = probe_ext2(fd, cache, dev, id, buf, ret_sectype)) < 0)
- return ret;
+ /* 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;
- if (!(blkid_le32(es->s_feature_incompat) &
- EXT3_FEATURE_INCOMPAT_RECOVER))
- *ret_sectype = "ext2";
+ get_ext2_info(probe->dev, id, buf);
+ return 0;
+}
+
+static int probe_ext2(struct blkid_probe *probe, struct blkid_magic *id,
+ unsigned char *buf)
+{
+ struct ext2_super_block *es;
+
+ es = (struct ext2_super_block *)buf;
+ /* 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(probe->dev, id, buf);
return 0;
}
-static int probe_vfat(int fd, blkid_cache cache, blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf,
- const char **ret_sectype)
+static int probe_jbd(struct blkid_probe *probe, struct blkid_magic *id,
+ unsigned char *buf)
{
- struct vfat_super_block *vs;
- char serno[10];
+ struct ext2_super_block *es = (struct ext2_super_block *) buf;
- vs = (struct vfat_super_block *)buf;
+ if (!(blkid_le32(es->s_feature_incompat) &
+ EXT3_FEATURE_INCOMPAT_JOURNAL_DEV))
+ return -BLKID_ERR_PARAM;
- if (strncmp(vs->vs_label, "NO NAME", 7)) {
- char *end = vs->vs_label + sizeof(vs->vs_label) - 1;
+ get_ext2_info(probe->dev, id, buf);
- while (*end == ' ' && end >= vs->vs_label)
- --end;
- if (end >= vs->vs_label)
- blkid_set_tag(dev, "LABEL", vs->vs_label,
- end - vs->vs_label + 1, 1);
- }
+ return 0;
+}
- /* 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, "UUID", serno, sizeof(serno), 1);
+#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 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_msdos(int fd, blkid_cache cache, blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf,
- const char **ret_sectype)
+/* 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 *) buf;
struct msdos_super_block *ms = (struct msdos_super_block *) buf;
+ struct vfat_dir_entry *dir;
char serno[10];
+ 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);
+
+ fat_length = blkid_le16(ms->ms_fat_length);
+ if (fat_length == 0)
+ fat_length = blkid_le32(vs->vs_fat32_length);
+
+ fat_size = fat_length * ms->ms_fats;
+ dir_size = ((dir_entries * sizeof(struct vfat_dir_entry)) +
+ (sector_size-1)) / sector_size;
+
+ 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 (strncmp(ms->ms_label, "NO NAME", 7)) {
- char *end = ms->ms_label + sizeof(ms->ms_label) - 1;
+ if (!vol_label || !memcmp(vol_label, no_name, 11))
+ vol_label = vs->vs_label;
+ vol_serno = vs->vs_serno;
+ }
- while (*end == ' ' && end >= ms->ms_label)
- --end;
- if (end >= ms->ms_label)
- blkid_set_tag(dev, "LABEL", ms->ms_label,
- end - ms->ms_label + 1, 1);
+ 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", ms->ms_serno[3], ms->ms_serno[2],
- ms->ms_serno[1], ms->ms_serno[0]);
- blkid_set_tag(dev, "UUID", serno, 0, 1);
+ 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;
+}
+
+/*
+ * 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 vfat_super_block *vs;
+
+ vs = (struct vfat_super_block *)buf;
+
+ /* heads check */
+ if (vs->vs_heads == 0)
+ return 1;
+
+ /* cluster size check*/
+ if (vs->vs_cluster_size == 0 ||
+ (vs->vs_cluster_size & (vs->vs_cluster_size-1)))
+ return 1;
+
+ /* media check */
+ if (vs->vs_media < 0xf8 && vs->vs_media != 0xf0)
+ return 1;
+
+ /* fat counts(Linux kernel expects at least 1 FAT table) */
+ if (!vs->vs_fats)
+ 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;
+ attr_off = blkid_le16(mft->attrs_offset);
+ label_str[0] = 0;
+
+ 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;
+ }
+ }
+
+ 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_cache cache, blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf,
- const char **ret_sectype)
+
+static int probe_xfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
{
struct xfs_super_block *xs;
+ const char *label = 0;
xs = (struct xfs_super_block *)buf;
if (strlen(xs->xs_fname))
- blkid_set_tag(dev, "LABEL", xs->xs_fname,
- sizeof(xs->xs_fname), 1);
- set_uuid(dev, xs->xs_uuid);
+ label = xs->xs_fname;
+ 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_cache cache, blkid_dev dev,
- struct blkid_magic *id, unsigned char *buf,
- const char **ret_sectype)
+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;
unsigned int blocksize;
+ const char *label = 0;
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 (strlen(rs->rs_label)) {
- blkid_set_tag(dev, "LABEL", rs->rs_label,
- sizeof(rs->rs_label), 1);
- }
+ if (id->bim_magic[6] == '2' || id->bim_magic[6] == '3') {
+ if (strlen(rs->rs_label))
+ label = rs->rs_label;
+ set_uuid(probe->dev, rs->rs_uuid, 0);
+ }
+ 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(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct jfs_super_block *js;
+ const char *label = 0;
+
+ js = (struct jfs_super_block *)buf;
+
+ if (strlen((char *) js->js_label))
+ label = (char *) js->js_label;
+ blkid_set_tag(probe->dev, "LABEL", label, sizeof(js->js_label));
+ set_uuid(probe->dev, js->js_uuid, 0);
+ return 0;
+}
+
+static int probe_luks(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ unsigned char uuid[40];
+ /* 168 is the offset to the 40 character uuid:
+ * http://luks.endorphin.org/LUKS-on-disk-format.pdf */
+ strncpy(uuid, 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;
+ const char *label = 0;
+
+ ros = (struct romfs_super_block *)buf;
+
+ if (strlen((char *) ros->ros_volume))
+ label = (char *) ros->ros_volume;
+ blkid_set_tag(probe->dev, "LABEL", label, 0);
+ return 0;
+}
+
+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;
+
+ csb = (struct cramfs_super_block *)buf;
+
+ if (strlen((char *) csb->name))
+ label = (char *) csb->name;
+ blkid_set_tag(probe->dev, "LABEL", label, 0);
+ return 0;
+}
+
+static int probe_swap0(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf __BLKID_ATTR((unused)))
+{
+ blkid_set_tag(probe->dev, "UUID", 0, 0);
+ blkid_set_tag(probe->dev, "LABEL", 0, 0);
+ return 0;
+}
+
+static int probe_swap1(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf __BLKID_ATTR((unused)))
+{
+ struct swap_id_block *sws;
+
+ 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).
+ */
+ sws = (struct swap_id_block *) get_buffer(probe, 1024, 1024);
+ if (!sws)
+ 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(probe->dev, "LABEL", sws->sws_volume,
+ sizeof(sws->sws_volume));
+ if (sws->sws_uuid[0])
+ set_uuid(probe->dev, sws->sws_uuid, 0);
+ }
+ 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;
+}
+
- set_uuid(dev, rs->rs_uuid);
+static const char
+*udf_magic[] = { "BEA01", "BOOT2", "CD001", "CDW02", "NSR02",
+ "NSR03", "TEA01", 0 };
+
+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;
+ 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++) {
+ isosb = (struct iso_volume_descriptor *)
+ get_buffer(probe, bs*2048+32768, sizeof(isosb));
+ if (!isosb)
+ return 1;
+ 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) {
+ 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 (!memcmp(isosb->vd_id, "NSR0", 4))
+ return 0;
+ for (m = udf_magic; *m; m++)
+ if (!memcmp(*m, isosb->vd_id, 5))
+ break;
+ if (*m == 0)
+ return 1;
+ }
+ return 1;
+}
+
+static int probe_ocfs(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct ocfs_volume_header ovh;
+ struct ocfs_volume_label ovl;
+ __u32 major;
+
+ memcpy(&ovh, buf, sizeof(ovh));
+ memcpy(&ovl, buf+512, sizeof(ovl));
+
+ major = ocfsmajor(ovh);
+ if (major == 1)
+ blkid_set_tag(probe->dev,"SEC_TYPE","ocfs1",sizeof("ocfs1"));
+ else if (major >= 9)
+ 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(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(probe->dev, "LABEL", osb->s_label, sizeof(osb->s_label));
+ set_uuid(probe->dev, osb->s_uuid, 0);
+ return 0;
+}
+
+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(probe->dev, "LABEL", dl->dl_id, sizeof(dl->dl_id));
+ return 0;
+}
+
+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 int probe_hfsplus(struct blkid_probe *probe,
+ struct blkid_magic *id __BLKID_ATTR((unused)),
+ unsigned char *buf)
+{
+ struct hfs_mdb *sbd = (struct hfs_mdb *)buf;
+
+ /* Check for a HFS+ volume embedded in a HFS volume */
+ if (memcmp(sbd->embed_sig, "H+", 2) == 0)
+ return 0;
+
+ return 1;
+}
+
/*
* BLKID_BLK_OFFS is at least as large as the highest bim_kboff defined
* in the type_array table below + bim_kbalign.
*/
static struct blkid_magic type_array[] = {
/* type kboff sboff len magic probe */
+ { "oracleasm", 0, 32, 8, "ORCLDISK", probe_oracleasm },
+ { "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 },
- { "ntfs", 0, 3, 8, "NTFS ", 0 },
- { "vfat", 0, 0x52, 5, "MSWIN", probe_vfat },
- { "vfat", 0, 0x52, 8, "FAT32 ", probe_vfat },
- { "msdos", 0, 0x36, 5, "MSDOS", probe_msdos },
- { "msdos", 0, 0x36, 8, "FAT16 ", probe_msdos },
- { "msdos", 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 },
{ "minix", 1, 0x10, 2, "\170\044", 0 },
{ "vxfs", 1, 0, 4, "\365\374\001\245", 0 },
{ "xfs", 0, 0, 4, "XFSB", probe_xfs },
- { "romfs", 0, 0, 8, "-rom1fs-", 0 },
+ { "romfs", 0, 0, 8, "-rom1fs-", probe_romfs },
{ "bfs", 0, 0, 4, "\316\372\173\033", 0 },
- { "cramfs", 0, 0, 4, "E=\315\034", 0 },
+ { "cramfs", 0, 0, 4, "E=\315\050", probe_cramfs },
{ "qnx4", 0, 4, 6, "QNX4FS", 0 },
- { "iso9660", 32, 1, 5, "CD001", 0 },
- { "iso9660", 32, 9, 5, "CDROM", 0 },
- { "udf", 32, 1, 5, "BEA01", 0 },
- { "udf", 32, 1, 5, "BOOT2", 0 },
- { "udf", 32, 1, 5, "CD001", 0 },
- { "udf", 32, 1, 5, "CDW02", 0 },
- { "udf", 32, 1, 5, "NSR02", 0 },
- { "udf", 32, 1, 5, "NSR03", 0 },
- { "udf", 32, 1, 5, "TEA01", 0 },
- { "jfs", 32, 0, 4, "JFS1", 0 },
+ { "udf", 32, 1, 5, "BEA01", probe_udf },
+ { "udf", 32, 1, 5, "BOOT2", probe_udf },
+ { "udf", 32, 1, 5, "CD001", probe_udf },
+ { "udf", 32, 1, 5, "CDW02", probe_udf },
+ { "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", probe_iso9660 },
+ { "iso9660", 32, 9, 5, "CDROM", probe_iso9660 },
+ { "jfs", 32, 0, 4, "JFS1", probe_jfs },
+ { "hfsplus", 1, 0, 2, "BD", probe_hfsplus },
+ { "hfsplus", 1, 0, 2, "H+", 0 },
{ "hfs", 1, 0, 2, "BD", 0 },
{ "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", 0 },
- { "swap", 0, 0xff6, 10, "SWAPSPACE2", 0 },
- { "swap", 0, 0x1ff6, 10, "SWAP-SPACE", 0 },
- { "swap", 0, 0x1ff6, 10, "SWAPSPACE2", 0 },
- { "swap", 0, 0x3ff6, 10, "SWAP-SPACE", 0 },
- { "swap", 0, 0x3ff6, 10, "SWAPSPACE2", 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 },
+ { "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 },
+ { "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 },
+ { "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 },
+ { "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 },
+ { "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 },
{ NULL, 0, 0, 0, NULL, NULL }
};
/*
- * If a device's filesystem no longer checks out, we need to nuke
- * information about it from the entry.
- */
-static void blkid_invalidate_fs(blkid_dev dev)
-{
- blkid_set_tag(dev, "TYPE", 0, 0, 0);
- blkid_set_tag(dev, "LABEL", 0, 0, 0);
- blkid_set_tag(dev, "UUID", 0, 0, 0);
-}
-
-/*
* Verify that the data in dev is consistent with what is on the actual
* block device (using the devname field only). Normally this will be
* called when finding items in the cache, but for long running processes
* If we are unable to revalidate the data, we return the old data and
* do not set the BLKID_BID_FL_VERIFIED flag on it.
*/
-blkid_dev blkid_verify_devname(blkid_cache cache, blkid_dev dev)
+blkid_dev blkid_verify(blkid_cache cache, blkid_dev dev)
{
struct blkid_magic *id;
- unsigned char *bufs[BLKID_BLK_OFFS + 1], *buf;
- const char *sec_type, *type;
+ struct blkid_probe probe;
+ blkid_tag_iterate iter;
+ unsigned char *buf;
+ const char *type, *value;
struct stat st;
- time_t diff;
- int fd, idx;
+ time_t diff, now;
+ int idx;
if (!dev)
return NULL;
- diff = time(0) - dev->bid_time;
+ now = time(0);
+ diff = now - dev->bid_time;
- if (diff < BLKID_PROBE_MIN || (dev->bid_flags & BLKID_BID_FL_VERIFIED &&
- diff < BLKID_PROBE_INTERVAL))
+ if ((now > dev->bid_time) && (diff > 0) &&
+ ((diff < BLKID_PROBE_MIN) ||
+ (dev->bid_flags & BLKID_BID_FL_VERIFIED &&
+ diff < BLKID_PROBE_INTERVAL)))
return dev;
- DBG(printf("need to revalidate %s (time since last check %lu)\n",
- dev->bid_name, diff));
+ DBG(DEBUG_PROBE,
+ printf("need to revalidate %s (time since last check %llu)\n",
+ dev->bid_name, (unsigned long long)diff));
- if (((fd = open(dev->bid_name, O_RDONLY)) < 0) ||
- (fstat(fd, &st) < 0) || !S_ISBLK(st.st_mode)) {
- if (errno == ENXIO || errno == ENODEV || errno == ENOENT) {
+ if (((probe.fd = open(dev->bid_name, O_RDONLY)) < 0) ||
+ (fstat(probe.fd, &st) < 0)) {
+ if (probe.fd >= 0) close(probe.fd);
+ if (errno != EPERM) {
blkid_free_dev(dev);
return NULL;
}
/* We don't have read permission, just return cache data. */
- DBG(printf("returning unverified data for %s\n", dev->bid_name));
+ DBG(DEBUG_PROBE,
+ printf("returning unverified data for %s\n",
+ dev->bid_name));
return dev;
}
- 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,
*/
try_again:
type = 0;
- sec_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),
id->bim_len))
continue;
if ((id->bim_probe == NULL) ||
- (id->bim_probe(fd, cache, dev, id, buf, &sec_type) == 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_invalidate_fs(dev);
+ 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:
dev->bid_flags |= BLKID_BID_FL_VERIFIED;
cache->bic_flags |= BLKID_BIC_FL_CHANGED;
- blkid_set_tag(dev, "TYPE", type, 0, 1);
- if (sec_type)
- blkid_set_tag(dev, "TYPE", sec_type, 0, 0);
+ blkid_set_tag(dev, "TYPE", type, 0);
- DBG(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);
+ if (probe.sbbuf)
+ free(probe.sbbuf);
+ if (probe.buf)
+ free(probe.buf);
+ if (probe.fd >= 0)
+ close(probe.fd);
return dev;
}
+int blkid_known_fstype(const char *fstype)
+{
+ struct blkid_magic *id;
+
+ for (id = type_array; id->bim_type; id++) {
+ if (strcmp(fstype, id->bim_type) == 0)
+ return 1;
+ }
+ return 0;
+}
+
#ifdef TEST_PROGRAM
int main(int argc, char **argv)
{
blkid_dev dev;
blkid_cache cache;
+ int ret;
if (argc != 2) {
fprintf(stderr, "Usage: %s device\n"
"Probe a single device to determine type\n", argv[0]);
exit(1);
}
- cache = blkid_new_cache();
+ if ((ret = blkid_get_cache(&cache, "/dev/null")) != 0) {
+ fprintf(stderr, "%s: error creating cache (%d)\n",
+ argv[0], ret);
+ exit(1);
+ }
dev = blkid_get_dev(cache, argv[1], BLKID_DEV_NORMAL);
if (!dev) {
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