diff options
Diffstat (limited to 'libblkid/src/superblocks/udf.c')
| -rw-r--r-- | libblkid/src/superblocks/udf.c | 27 |
1 files changed, 21 insertions, 6 deletions
diff --git a/libblkid/src/superblocks/udf.c b/libblkid/src/superblocks/udf.c index 36adf60..76d4236 100644 --- a/libblkid/src/superblocks/udf.c +++ b/libblkid/src/superblocks/udf.c @@ -233,6 +233,7 @@ static int probe_udf(blkid_probe pr, size_t i; uint32_t vsd_len; uint16_t udf_rev = 0; + int is_udf = 0; int vsd_2048_valid = -1; int have_label = 0; int have_uuid = 0; @@ -343,6 +344,8 @@ anchor: return 1; real_blksz: + /* At this stage we detected ISO/IEC 13346 or ECMA-167 filesystem recognition sequence, it does not have to be UDF */ + /* Use the actual block size from here on out */ bs = pbs[i]; @@ -454,11 +457,17 @@ real_blksz: lvid_loc = le32_to_cpu(vd->type.logical.lvid_location); } } - if (!udf_rev) { - /* UDF-2.60: 2.1.5.3: UDF revision field shall indicate revision of UDF document - * We use maximal value from this field and from LVIDIU fields for ID_FS_VERSION */ - if (strncmp(vd->type.logical.domain_id, "*OSTA UDF Compliant", sizeof(vd->type.logical.domain_id)) == 0) - udf_rev = le16_to_cpu(vd->type.logical.udf_rev); + if (!is_udf || !udf_rev) { + /* UDF-2.60: 2.2.4.3: This field shall indicate that the contents of + * this logical volume conforms to the domain defined in this document. + * This distinguish UDF from all other ISO/IEC 13346 and ECMA-167 filesystems. */ + if (strncmp(vd->type.logical.domain_id, "*OSTA UDF Compliant", sizeof(vd->type.logical.domain_id)) == 0) { + is_udf = 1; + /* UDF-2.60: 2.1.5.3: UDF revision field shall indicate revision of UDF document + * We use maximal value from this field and from LVIDIU fields for ID_FS_VERSION */ + if (!udf_rev) + udf_rev = le16_to_cpu(vd->type.logical.udf_rev); + } } if ((!have_logvolid || !have_label) && is_charset_udf(vd->type.logical.desc_charset)) { /* LogicalVolumeIdentifier in UDF 2.01 specification: @@ -520,10 +529,15 @@ real_blksz: vd->type.imp_use_volume.lvinfo1.c, clen, enc); } } - if (have_volid && have_uuid && have_volsetid && have_logvolid && have_label && lvid_len && lvid_loc && have_applicationid && have_publisherid) + if (is_udf && have_volid && have_uuid && have_volsetid && have_logvolid && have_label && lvid_len && lvid_loc && have_applicationid && have_publisherid) break; } + if (!is_udf) { + /* We detected some other ISO/IEC 13346 or ECMA-167 filesystem, not UDF */ + return 1; + } + /* Pick the first logical volume integrity descriptor and read UDF revision */ if (lvid_loc && lvid_len >= sizeof(*vd)) { vd = (struct volume_descriptor *) @@ -584,6 +598,7 @@ const struct blkid_idinfo udf_idinfo = .flags = BLKID_IDINFO_TOLERANT, .magics = { + /* These magics are generic to all ISO/IEC 13346 and ECMA-167 filesystems, not just UDF */ { .magic = "BEA01", .len = 5, .kboff = 32, .sboff = 1, .hoff = "session_offset" }, { .magic = "BOOT2", .len = 5, .kboff = 32, .sboff = 1, .hoff = "session_offset" }, { .magic = "CD001", .len = 5, .kboff = 32, .sboff = 1, .hoff = "session_offset" }, |