diff options
| -rw-r--r-- | util-linux/mkfs_ext2.c | 11 | ||||
| -rw-r--r-- | util-linux/mkfs_ext2.txt | 75 |
2 files changed, 81 insertions, 5 deletions
diff --git a/util-linux/mkfs_ext2.c b/util-linux/mkfs_ext2.c index 5cd9238..06858ef 100644 --- a/util-linux/mkfs_ext2.c +++ b/util-linux/mkfs_ext2.c @@ -605,16 +605,17 @@ int mkfs_ext2_main(int argc UNUSED_PARAM, char **argv) PUT(((uint64_t)FETCH_LE32(gd[0].bg_inode_table) * blocksize) + (EXT2_GOOD_OLD_FIRST_INO-1) * sizeof(*inode), buf, sizeof(*inode)); - // zero the blocks for "/lost+found" + // dump directories memset(buf, 0, blocksize); + dir = (struct ext2_dir *)buf; + + // dump 2nd+ blocks of "/lost+found" + STORE_LE(dir->rec_len1, blocksize); // e2fsck 1.41.4 compat for (i = 1; i < lost_and_found_blocks; ++i) PUT((uint64_t)(FETCH_LE32(gd[0].bg_inode_table) + inode_table_blocks + 1+i) * blocksize, buf, blocksize); - // dump directories - dir = (struct ext2_dir *)buf; - - // dump lost+found dir block + // dump 1st block of "/lost+found" STORE_LE(dir->inode1, EXT2_GOOD_OLD_FIRST_INO); STORE_LE(dir->rec_len1, 12); STORE_LE(dir->name_len1, 1); diff --git a/util-linux/mkfs_ext2.txt b/util-linux/mkfs_ext2.txt new file mode 100644 index 0000000..1eb2d92 --- /dev/null +++ b/util-linux/mkfs_ext2.txt @@ -0,0 +1,75 @@ +Difference between bbox mke2fs and standard one (dumpe2fs comparison): + +Two significant differences: +- standard mke2fs has resize_inode feature and thus has reserved GDT blocks, + which decreases free blocks; +- inode size: 128/256 (since 679807k is >0.5G, standard mke2fs uses "big" inodes) + this affects inode table in block groups + +Filesystem volume name: <none> Filesystem volume name: <none> +Last mounted on: <not available> Last mounted on: <not available> +Filesystem UUID: f4839760-c89b-44b7-ac52-08b4e326c0b4 Filesystem UUID: 71179558-8c8e-4a56-ad54-018008f5c358 +Filesystem magic number: 0xEF53 Filesystem magic number: 0xEF53 +Filesystem revision #: 1 (dynamic) Filesystem revision #: 1 (dynamic) +Filesystem features: ext_attr dir_index filetype sparse_super Filesystem features: ext_attr resize_inode dir_index filetype sparse_super large_file +Filesystem flags: signed_directory_hash Filesystem flags: signed_directory_hash +Default mount options: (none) Default mount options: (none) +Filesystem state: clean Filesystem state: clean +Errors behavior: Continue Errors behavior: Continue +Filesystem OS type: Linux Filesystem OS type: Linux +Inode count: 42624 Inode count: 42528 +Block count: 169951 Block count: 169951 +Reserved block count: 8497 Reserved block count: 8497 +Free blocks: 168594 Free blocks: 167103 +Free inodes: 42613 Free inodes: 42517 +First block: 0 First block: 0 +Block size: 4096 Block size: 4096 +Fragment size: 4096 Fragment size: 4096 + Reserved GDT blocks: 41 +Blocks per group: 32768 Blocks per group: 32768 +Fragments per group: 32768 Fragments per group: 32768 +Inodes per group: 7104 Inodes per group: 7088 +Inode blocks per group: 222 Inode blocks per group: 443 +Filesystem created: Wed Oct 21 13:40:55 2009 Filesystem created: Wed Oct 21 13:40:55 2009 +Last mount time: n/a Last mount time: n/a +Last write time: Wed Oct 21 13:40:55 2009 Last write time: Wed Oct 21 13:40:55 2009 +Mount count: 0 Mount count: 0 +Maximum mount count: 20 Maximum mount count: 37 +Last checked: Wed Oct 21 13:40:55 2009 Last checked: Wed Oct 21 13:40:55 2009 +Check interval: 15552000 (6 months) Check interval: 15552000 (6 months) +Next check after: Mon Apr 19 13:40:55 2010 Next check after: Mon Apr 19 13:40:55 2010 +Reserved blocks uid: 0 (user root) Reserved blocks uid: 0 (user root) +Reserved blocks gid: 0 (group root) Reserved blocks gid: 0 (group root) +First inode: 11 First inode: 11 +Inode size: 128 Inode size: 256 + Required extra isize: 28 + Desired extra isize: 28 +Default directory hash: half_md4 Default directory hash: half_md4 +Directory Hash Seed: ff94d047-c9ca-4fe5-b553-937a76101a89 Directory Hash Seed: c270fd43-9868-4a92-ae99-050098e12835 + + +Group 0: (Blocks 0-32767) Group 0: (Blocks 0-32767) + Primary superblock at 0, Group descriptors at 1-1 Primary superblock at 0, Group descriptors at 1-1 + Reserved GDT blocks at 2-42 + Block bitmap at 2 (+2), Inode bitmap at 3 (+3) Block bitmap at 43 (+43), Inode bitmap at 44 (+44) + Inode table at 4-225 (+4) Inode table at 45-487 (+45) + 32537 free blocks, 7093 free inodes, 2 directories 32274 free blocks, 7077 free inodes, 2 directories + Free blocks: 231-32767 Free blocks: 494-32767 + Free inodes: 12-7104 Free inodes: 12-7088 + +Group 1: (Blocks 32768-65535) Group 1: (Blocks 32768-65535) + Backup superblock at 32768, Group descriptors at 32769-32769 Backup superblock at 32768, Group descriptors at 32769-32769 + Reserved GDT blocks at 32770-32810 + Block bitmap at 32770 (+2), Inode bitmap at 32771 (+3) Block bitmap at 32811 (+43), Inode bitmap at 32812 (+44) + Inode table at 32772-32993 (+4) Inode table at 32813-33255 (+45) + 32542 free blocks, 7104 free inodes, 0 directories 32280 free blocks, 7088 free inodes, 0 directories + Free blocks: 32994-65535 Free blocks: 33256-65535 + Free inodes: 7105-14208 Free inodes: 7089-14176 + +Group 2: (Blocks 65536-98303) Group 2: (Blocks 65536-98303) + Block bitmap at 65536 (+0), Inode bitmap at 65537 (+1) Block bitmap at 65536 (+0), Inode bitmap at 65537 (+1) + Inode table at 65538-65759 (+2) Inode table at 65538-65980 (+2) + 32544 free blocks, 7104 free inodes, 0 directories 32323 free blocks, 7088 free inodes, 0 directories + Free blocks: 65760-98303 Free blocks: 65981-98303 + Free inodes: 14209-21312 Free inodes: 14177-21264 +... |