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",
blkid_le32(es->s_feature_compat),
blkid_le32(es->s_feature_incompat),
blkid_le32(es->s_feature_ro_compat)));
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"));
}
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;
/*
* 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_ext3(struct blkid_probe *probe, struct blkid_magic *id,
unsigned char *buf)
{
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;
/* 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 void get_ext2_info(blkid_dev dev, 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",
blkid_le32(es->s_feature_compat),
blkid_le32(es->s_feature_incompat),
blkid_le32(es->s_feature_ro_compat)));
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);
}
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 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 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) &&
!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;
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;
}
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_jbd(struct blkid_probe *probe, struct blkid_magic *id,
unsigned char *buf)
{
struct ext2_super_block *es = (struct ext2_super_block *) buf;
if (!(blkid_le32(es->s_feature_incompat) &
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV))
return -BLKID_ERR_PARAM;
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;
}
