diff options
| author | Kay Sievers <kay.sievers@vrfy.org> | 2007-07-08 17:25:55 +0200 |
|---|---|---|
| committer | Kay Sievers <kay.sievers@vrfy.org> | 2007-07-08 17:25:55 +0200 |
| commit | 2e08169ed4618718636e162bca5be147179da91c (patch) | |
| tree | 8560582a8bb072c87c8c8f11ecbaf37c91cfb5da /extras/volume_id/lib/ext.c | |
| parent | 2e23125e112c0a56e1ccee193c2cfe0e26af1bad (diff) | |
volume_id: ext4 detection
Diffstat (limited to 'extras/volume_id/lib/ext.c')
| -rw-r--r-- | extras/volume_id/lib/ext.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/extras/volume_id/lib/ext.c b/extras/volume_id/lib/ext.c index e5f1e22f6e..1997d42e0b 100644 --- a/extras/volume_id/lib/ext.c +++ b/extras/volume_id/lib/ext.c @@ -63,8 +63,12 @@ struct ext2_super_block { } PACKED; #define EXT_SUPER_MAGIC 0xEF53 -#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x00000004 -#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x00000008 +#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 +#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 +#define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040 +#define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 +#define EXT4_FEATURE_INCOMPAT_MMP 0x0100 + #define EXT_SUPERBLOCK_OFFSET 0x400 #define EXT3_MIN_BLOCK_SIZE 0x400 @@ -74,6 +78,8 @@ int volume_id_probe_ext(struct volume_id *id, uint64_t off, uint64_t size) { struct ext2_super_block *es; size_t bsize; + uint32_t feature_compat; + uint32_t feature_incompat; info("probing at offset 0x%llx", (unsigned long long) off); @@ -97,19 +103,32 @@ int volume_id_probe_ext(struct volume_id *id, uint64_t off, uint64_t size) snprintf(id->type_version, sizeof(id->type_version)-1, "%u.%u", le32_to_cpu(es->s_rev_level), le16_to_cpu(es->s_minor_rev_level)); + feature_compat = le32_to_cpu(es->s_feature_compat); + feature_incompat = le32_to_cpu(es->s_feature_incompat); + /* check for external journal device */ - if ((le32_to_cpu(es->s_feature_incompat) & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) != 0) { + if ((feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) != 0) { volume_id_set_usage(id, VOLUME_ID_OTHER); id->type = "jbd"; - return 0; + goto out; } - /* check for ext2 / ext3 */ volume_id_set_usage(id, VOLUME_ID_FILESYSTEM); - if ((le32_to_cpu(es->s_feature_compat) & EXT3_FEATURE_COMPAT_HAS_JOURNAL) != 0) + + if ((feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) != 0 || + (feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT) != 0 || + (feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) != 0) { + id->type = "ext4"; + goto out; + } + + if ((feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) != 0) { id->type = "ext3"; - else - id->type = "ext2"; + goto out; + } + + id->type = "ext2"; +out: return 0; } |