diff options
Diffstat (limited to 'extras')
| -rw-r--r-- | extras/volume_id/lib/fat.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/extras/volume_id/lib/fat.c b/extras/volume_id/lib/fat.c index e5a5cc1191..9d26a987e0 100644 --- a/extras/volume_id/lib/fat.c +++ b/extras/volume_id/lib/fat.c @@ -311,6 +311,7 @@ int volume_id_probe_vfat(struct volume_id *id, uint64_t off, uint64_t size) return -1; magic: + info("magic found\n"); /* reserverd sector count */ if (!vs->reserved) return -1; @@ -333,6 +334,7 @@ magic: if (sector_size == 0 || ((sector_size & (sector_size-1)) != 0)) return -1; + info("checks passed\n"); dbg("sector_size 0x%x\n", sector_size); dbg("sectors_per_cluster 0x%x\n", vs->sectors_per_cluster); @@ -356,7 +358,7 @@ magic: fat_size = fat32_length * vs->fats; else return -1; - dbg("fat_size 0x%x\n", fat_size); + info("fat_size 0x%x\n", fat_size); dir_size = ((dir_entries * sizeof(struct vfat_dir_entry)) + (sector_size-1)) / sector_size; @@ -364,7 +366,7 @@ magic: cluster_count = sect_count - (reserved + fat_size + dir_size); cluster_count /= vs->sectors_per_cluster; - dbg("cluster_count 0x%x\n", cluster_count); + info("cluster_count 0x%x\n", cluster_count); /* must be FAT32 */ if (!fat_length && fat32_length) @@ -408,16 +410,24 @@ magic: goto found; fat32: + info("looking for FAT32\n"); /* FAT32 should have a valid signature in the fsinfo block */ fsinfo_sect = le16_to_cpu(vs->type.fat32.fsinfo_sector); buf = volume_id_get_buffer(id, off + (fsinfo_sect * sector_size), 0x200); if (buf == NULL) return -1; fsinfo = (struct fat32_fsinfo *) buf; + info("signature1: 0x%02x%02x%02x%02x\n", + fsinfo->signature1[0], fsinfo->signature1[1], + fsinfo->signature1[2], fsinfo->signature1[3]); + info("signature2: 0x%02x%02x%02x%02x\n", + fsinfo->signature2[0], fsinfo->signature2[1], + fsinfo->signature2[2], fsinfo->signature2[3]); if (memcmp(fsinfo->signature1, "\x52\x52\x61\x41", 4) != 0) return -1; if (memcmp(fsinfo->signature2, "\x72\x72\x41\x61", 4) != 0) return -1 ; + info("FAT32 signatures match\n"); vs = (struct vfat_super_block *) volume_id_get_buffer(id, off, 0x200); if (vs == NULL) |