*
* 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] "
#include "libbb.h"
#include <linux/fs.h>
-/*
- * Work around linux/ext2_fs.h breakage.
- * See https://bugzilla.kernel.org/show_bug.cgi?id=42986.
- */
-typedef mode_t bb__umode_t;
-#define umode_t bb__umode_t
-#include <linux/ext2_fs.h>
+#include "bb_e2fs_defs.h"
#define ENABLE_FEATURE_MKFS_EXT2_RESERVED_GDT 0
#define ENABLE_FEATURE_MKFS_EXT2_DIR_INDEX 1
-// from e2fsprogs
-#define s_reserved_gdt_blocks s_padding1
-#define s_mkfs_time s_reserved[0]
-#define s_flags s_reserved[22]
-
#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 = SWAP_LE32(value); \
- else if (sizeof(field) == 2) \
- field = SWAP_LE16(value); \
- else if (sizeof(field) == 1) \
- field = (value); \
- else \
- BUG_wrong_field_size(); \
-} while (0)
-
-#define FETCH_LE32(field) \
- (sizeof(field) == 4 ? SWAP_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);
}
// using global "option_mask32" instead of local "opts":
// we are register starved here
- opt_complementary = "-1:b+:i+:I+:m+";
- /*opts =*/ getopt32(argv, "cl:b:f:i:I:J:G:N:m:o:g:L:M:O:r:E:T:U:jnqvFS",
+ /*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,
// 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,
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