*
* Busybox'ed (2009) by Vladimir Dronnikov <dronnikov@gmail.com>
*
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
+//config:config MKE2FS
+//config: bool "mke2fs (10 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: Utility to create EXT2 filesystems.
+//config:
+//config:config MKFS_EXT2
+//config: bool "mkfs.ext2 (10 kb)"
+//config: default y
+//config: select PLATFORM_LINUX
+//config: help
+//config: Alias to "mke2fs".
+
+// APPLET_ODDNAME:name main location suid_type help
+//applet:IF_MKE2FS( APPLET_ODDNAME(mke2fs, mkfs_ext2, BB_DIR_SBIN, BB_SUID_DROP, mkfs_ext2))
+//applet:IF_MKFS_EXT2(APPLET_ODDNAME(mkfs.ext2, mkfs_ext2, BB_DIR_SBIN, BB_SUID_DROP, mkfs_ext2))
+////////:IF_MKFS_EXT3(APPLET_ODDNAME(mkfs.ext3, mkfs_ext2, BB_DIR_SBIN, BB_SUID_DROP, mkfs_ext2))
+
+//kbuild:lib-$(CONFIG_MKE2FS) += mkfs_ext2.o
+//kbuild:lib-$(CONFIG_MKFS_EXT2) += mkfs_ext2.o
+
+//usage:#define mkfs_ext2_trivial_usage
+//usage: "[-Fn] "
+/* //usage: "[-c|-l filename] " */
+//usage: "[-b BLK_SIZE] "
+/* //usage: "[-f fragment-size] [-g blocks-per-group] " */
+//usage: "[-i INODE_RATIO] [-I INODE_SIZE] "
+/* //usage: "[-j] [-J journal-options] [-N number-of-inodes] " */
+//usage: "[-m RESERVED_PERCENT] "
+/* //usage: "[-o creator-os] [-O feature[,...]] [-q] " */
+/* //usage: "[r fs-revision-level] [-E extended-options] [-v] [-F] " */
+//usage: "[-L LABEL] "
+/* //usage: "[-M last-mounted-directory] [-S] [-T filesystem-type] " */
+//usage: "BLOCKDEV [KBYTES]"
+//usage:#define mkfs_ext2_full_usage "\n\n"
+//usage: " -b BLK_SIZE Block size, bytes"
+/* //usage: "\n -c Check device for bad blocks" */
+/* //usage: "\n -E opts Set extended options" */
+/* //usage: "\n -f size Fragment size in bytes" */
+//usage: "\n -F Force"
+/* //usage: "\n -g N Number of blocks in a block group" */
+//usage: "\n -i RATIO Max number of files is filesystem_size / RATIO"
+//usage: "\n -I BYTES Inode size (min 128)"
+/* //usage: "\n -j Create a journal (ext3)" */
+/* //usage: "\n -J opts Set journal options (size/device)" */
+/* //usage: "\n -l file Read bad blocks list from file" */
+//usage: "\n -L LBL Volume label"
+//usage: "\n -m PERCENT Percent of blocks to reserve for admin"
+/* //usage: "\n -M dir Set last mounted directory" */
+//usage: "\n -n Dry run"
+/* //usage: "\n -N N Number of inodes to create" */
+/* //usage: "\n -o os Set the 'creator os' field" */
+/* //usage: "\n -O features Dir_index/filetype/has_journal/journal_dev/sparse_super" */
+/* //usage: "\n -q Quiet" */
+/* //usage: "\n -r rev Set filesystem revision" */
+/* //usage: "\n -S Write superblock and group descriptors only" */
+/* //usage: "\n -T fs-type Set usage type (news/largefile/largefile4)" */
+/* //usage: "\n -v Verbose" */
+
#include "libbb.h"
#include <linux/fs.h>
-#include <linux/ext2_fs.h>
-#include "volume_id/volume_id_internal.h"
-
-#define ENABLE_FEATURE_MKFS_EXT2_RESERVED_GDT 0
-#define ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX 1
+#include "bb_e2fs_defs.h"
-// from e2fsprogs
-#define s_reserved_gdt_blocks s_padding1
-#define s_mkfs_time s_reserved[0]
-#define s_flags s_reserved[22]
+#define ENABLE_FEATURE_MKFS_EXT2_RESERVED_GDT 0
+#define ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX 1
#define EXT2_HASH_HALF_MD4 1
#define EXT2_FLAGS_SIGNED_HASH 0x0001
#define EXT2_FLAGS_UNSIGNED_HASH 0x0002
-// storage helpers
-char BUG_wrong_field_size(void);
-#define STORE_LE(field, value) \
-do { \
- if (sizeof(field) == 4) \
- field = cpu_to_le32(value); \
- else if (sizeof(field) == 2) \
- field = cpu_to_le16(value); \
- else if (sizeof(field) == 1) \
- field = (value); \
- else \
- BUG_wrong_field_size(); \
-} while (0)
-
-#define FETCH_LE32(field) \
- (sizeof(field) == 4 ? cpu_to_le32(field) : BUG_wrong_field_size())
-
// All fields are little-endian
struct ext2_dir {
uint32_t inode1;
{
uint32_t i;
-//bb_info_msg("ALLOC: [%u][%u][%u]: [%u-%u]:=[%x],[%x]", blocksize, start, end, start/8, blocksize - end/8 - 1, (1 << (start & 7)) - 1, (uint8_t)(0xFF00 >> (end & 7)));
+//bb_error_msg("ALLOC: [%u][%u][%u]: [%u-%u]:=[%x],[%x]", blocksize, start, end, start/8, blocksize - end/8 - 1, (1 << (start & 7)) - 1, (uint8_t)(0xFF00 >> (end & 7)));
memset(bitmap, 0, blocksize);
i = start / 8;
memset(bitmap, 0xFF, i);
static void PUT(uint64_t off, void *buf, uint32_t size)
{
-// bb_info_msg("PUT[%llu]:[%u]", off, size);
+ //bb_error_msg("PUT[%llu]:[%u]", off, size);
xlseek(fd, off, SEEK_SET);
xwrite(fd, buf, size);
}
// only for directories, which never need i_size_high).
//
// Standard mke2fs creates a filesystem with 256-byte inodes if it is
-// bigger than 0.5GB. So far, we do not do this.
+// bigger than 0.5GB.
// Standard mke2fs 1.41.9:
// Usage: mke2fs [-c|-l filename] [-b block-size] [-f fragment-size]
// using global "option_mask32" instead of local "opts":
// we are register starved here
- opt_complementary = "-1:b+:m+:i+";
- /*opts =*/ getopt32(argv, "cl:b:f:i:I:J:G:N:m:o:g:L:M:O:r:E:T:U:jnqvFS",
- NULL, &bs, NULL, &bpi, &user_inodesize, NULL, NULL, NULL,
- &reserved_percent, NULL, NULL, &label, NULL, NULL, NULL, NULL, NULL, NULL);
+ /*opts =*/ getopt32(argv, "cl:b:+f:i:+I:+J:G:N:m:+o:g:L:M:O:r:E:T:U:jnqvFS",
+ /*lbfi:*/ NULL, &bs, NULL, &bpi,
+ /*IJGN:*/ &user_inodesize, NULL, NULL, NULL,
+ /*mogL:*/ &reserved_percent, NULL, NULL, &label,
+ /*MOrE:*/ NULL, NULL, NULL, NULL,
+ /*TU:*/ NULL, NULL);
argv += optind; // argv[0] -- device
// open the device, check the device is a block device
xmove_fd(xopen(argv[0], O_WRONLY), fd);
- fstat(fd, &st);
+ xfstat(fd, &st, argv[0]);
if (!S_ISBLK(st.st_mode) && !(option_mask32 & OPT_F))
- bb_error_msg_and_die("not a block device");
+ bb_error_msg_and_die("%s: not a block device", argv[0]);
// check if it is mounted
// N.B. what if we format a file? find_mount_point will return false negative since
// it is loop block device which is mounted!
if (find_mount_point(argv[0], 0))
- bb_error_msg_and_die("can't format mounted filesystem");
+ bb_simple_error_msg_and_die("can't format mounted filesystem");
// get size in kbytes
kilobytes = get_volume_size_in_bytes(fd, argv[1], 1024, /*extend:*/ !(option_mask32 & OPT_n)) / 1024;
kilobytes >>= (blocksize_log2 - EXT2_MIN_BLOCK_LOG_SIZE);
nblocks = kilobytes;
if (nblocks != kilobytes)
- bb_error_msg_and_die("block count doesn't fit in 32 bits");
+ bb_simple_error_msg_and_die("block count doesn't fit in 32 bits");
#define kilobytes kilobytes_unused_after_this
// Experimentally, standard mke2fs won't work on images smaller than 60k
if (nblocks < 60)
- bb_error_msg_and_die("need >= 60 blocks");
+ bb_simple_error_msg_and_die("need >= 60 blocks");
// How many reserved blocks?
if (reserved_percent > 50)
// (a bit after 8M image size), but it works for two->three groups
// transition (at 16M).
if (remainder && (remainder < overhead + 50)) {
-//bb_info_msg("CHOP[%u]", remainder);
+//bb_error_msg("CHOP[%u]", remainder);
nblocks -= remainder;
goto retry;
}
STORE_LE(sb->s_magic, EXT2_SUPER_MAGIC);
STORE_LE(sb->s_inode_size, inodesize);
// set "Required extra isize" and "Desired extra isize" fields to 28
- if (inodesize != sizeof(*inode))
- STORE_LE(sb->s_reserved[21], 0x001C001C);
+ if (inodesize != sizeof(*inode)) {
+ STORE_LE(sb->s_min_extra_isize, 0x001c);
+ STORE_LE(sb->s_want_extra_isize, 0x001c);
+ }
STORE_LE(sb->s_first_ino, EXT2_GOOD_OLD_FIRST_INO);
STORE_LE(sb->s_log_block_size, blocksize_log2 - EXT2_MIN_BLOCK_LOG_SIZE);
STORE_LE(sb->s_log_frag_size, blocksize_log2 - EXT2_MIN_BLOCK_LOG_SIZE);
free_blocks = (n < blocks_per_group ? n : blocks_per_group) - overhead;
// mark preallocated blocks as allocated
-//bb_info_msg("ALLOC: [%u][%u][%u]", blocksize, overhead, blocks_per_group - (free_blocks + overhead));
+//bb_error_msg("ALLOC: [%u][%u][%u]", blocksize, overhead, blocks_per_group - (free_blocks + overhead));
allocate(buf, blocksize,
// reserve "overhead" blocks
overhead,
// zero boot sectors
memset(buf, 0, blocksize);
- PUT(0, buf, 1024); // N.B. 1024 <= blocksize, so buf[0..1023] contains zeros
+ // Disabled: standard mke2fs doesn't do this, and
+ // on SPARC this destroys Sun disklabel.
+ // Users who need/want zeroing can easily do it with dd.
+ //PUT(0, buf, 1024); // N.B. 1024 <= blocksize, so buf[0..1023] contains zeros
+
// zero inode tables
for (i = 0; i < ngroups; ++i)
for (n = 0; n < inode_table_blocks; ++n)
n = FETCH_LE32(inode->i_block[0]) + 1;
for (i = 0; i < lost_and_found_blocks; ++i)
STORE_LE(inode->i_block[i], i + n); // use next block
-//bb_info_msg("LAST BLOCK USED[%u]", i + n);
+//bb_error_msg("LAST BLOCK USED[%u]", i + n);
PUT(((uint64_t)FETCH_LE32(gd[0].bg_inode_table) * blocksize) + (EXT2_GOOD_OLD_FIRST_INO-1) * inodesize,
buf, inodesize);
projects / oweals / busybox.git / blobdiff