/*
* initialize.c --- initialize a filesystem handle given superblock
* parameters. Used by mke2fs when initializing a filesystem.
- *
+ *
* Copyright (C) 1994, 1995, 1996 Theodore Ts'o.
- *
+ *
* %Begin-Header%
- * This file may be redistributed under the terms of the GNU Public
- * License.
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
* %End-Header%
*/
+#include "config.h"
#include <stdio.h>
#include <string.h>
#if HAVE_UNISTD_H
#include "ext2_fs.h"
#include "ext2fs.h"
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
#if defined(__linux__) && defined(EXT2_OS_LINUX)
#define CREATOR_OS EXT2_OS_LINUX
#else
#endif /* defined(__FreeBSD__) && defined(EXT2_OS_FREEBSD) */
#endif /* defined(__GNU__) && defined(EXT2_OS_HURD) */
#endif /* defined(__linux__) && defined(EXT2_OS_LINUX) */
-
-/*
- * Note we override the kernel include file's idea of what the default
- * check interval (never) should be. It's a good idea to check at
- * least *occasionally*, specially since servers will never rarely get
- * to reboot, since Linux is so robust these days. :-)
- *
- * 180 days (six months) seems like a good value.
- */
-#ifdef EXT2_DFL_CHECKINTERVAL
-#undef EXT2_DFL_CHECKINTERVAL
-#endif
-#define EXT2_DFL_CHECKINTERVAL (86400L * 180L)
/*
* Calculate the number of GDT blocks to reserve for online filesystem growth.
/* We set it at 1024x the current filesystem size, or
* the upper block count limit (2^32), whichever is lower.
*/
- if (sb->s_blocks_count < max_blocks / 1024)
- max_blocks = sb->s_blocks_count * 1024;
+ if (ext2fs_blocks_count(sb) < max_blocks / 1024)
+ max_blocks = ext2fs_blocks_count(sb) * 1024;
+ /*
+ * ext2fs_div64_ceil() is unnecessary because max_blocks is
+ * max _GDT_ blocks, which is limited to 32 bits.
+ */
rsv_groups = ext2fs_div_ceil(max_blocks - sb->s_first_data_block, bpg);
rsv_gdb = ext2fs_div_ceil(rsv_groups, gdpb) - fs->desc_blocks;
if (rsv_gdb > EXT2_ADDR_PER_BLOCK(sb))
ext2_filsys fs;
errcode_t retval;
struct ext2_super_block *super;
- int frags_per_block;
unsigned int rem;
unsigned int overhead = 0;
unsigned int ipg;
dgrp_t i;
+ blk64_t free_blocks;
blk_t numblocks;
int rsv_gdt;
+ int csum_flag;
+ int bigalloc_flag;
int io_flags;
- char *buf;
+ int has_bg;
+ unsigned reserved_inos;
+ char *buf = 0;
char c;
+ double reserved_ratio;
+ char *time_env;
- if (!param || !param->s_blocks_count)
+ if (!param || !ext2fs_blocks_count(param))
return EXT2_ET_INVALID_ARGUMENT;
-
+
retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
if (retval)
return retval;
-
+
memset(fs, 0, sizeof(struct struct_ext2_filsys));
fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
fs->flags = flags | EXT2_FLAG_RW;
fs->umask = 022;
+ fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
#ifdef WORDS_BIGENDIAN
fs->flags |= EXT2_FLAG_SWAP_BYTES;
#endif
+
+ time_env = getenv("E2FSPROGS_FAKE_TIME");
+ if (time_env)
+ fs->now = strtoul(time_env, NULL, 0);
+
io_flags = IO_FLAG_RW;
if (flags & EXT2_FLAG_EXCLUSIVE)
io_flags |= IO_FLAG_EXCLUSIVE;
+ if (flags & EXT2_FLAG_DIRECT_IO)
+ io_flags |= IO_FLAG_DIRECT_IO;
+ io_flags |= O_BINARY;
retval = manager->open(name, io_flags, &fs->io);
if (retval)
goto cleanup;
#define set_field(field, default) (super->field = param->field ? \
param->field : (default))
+#define assign_field(field) (super->field = param->field)
super->s_magic = EXT2_SUPER_MAGIC;
super->s_state = EXT2_VALID_FS;
- set_field(s_log_block_size, 0); /* default blocksize: 1024 bytes */
- set_field(s_log_frag_size, 0); /* default fragsize: 1024 bytes */
- set_field(s_first_data_block, super->s_log_block_size ? 0 : 1);
- set_field(s_max_mnt_count, EXT2_DFL_MAX_MNT_COUNT);
+ bigalloc_flag = ext2fs_has_feature_bigalloc(param);
+
+ assign_field(s_log_block_size);
+
+ if (bigalloc_flag) {
+ set_field(s_log_cluster_size, super->s_log_block_size+4);
+ if (super->s_log_block_size > super->s_log_cluster_size) {
+ retval = EXT2_ET_INVALID_ARGUMENT;
+ goto cleanup;
+ }
+ } else
+ super->s_log_cluster_size = super->s_log_block_size;
+
+ set_field(s_first_data_block, super->s_log_cluster_size ? 0 : 1);
+ set_field(s_max_mnt_count, 0);
set_field(s_errors, EXT2_ERRORS_DEFAULT);
set_field(s_feature_compat, 0);
set_field(s_feature_incompat, 0);
set_field(s_feature_ro_compat, 0);
+ set_field(s_default_mount_opts, 0);
set_field(s_first_meta_bg, 0);
+ set_field(s_raid_stride, 0); /* default stride size: 0 */
+ set_field(s_raid_stripe_width, 0); /* default stripe width: 0 */
+ set_field(s_log_groups_per_flex, 0);
+ set_field(s_flags, 0);
+ assign_field(s_backup_bgs[0]);
+ assign_field(s_backup_bgs[1]);
+
+ assign_field(s_encoding);
+ assign_field(s_encoding_flags);
+
+ if (ext2fs_has_feature_casefold(param))
+ fs->encoding = ext2fs_load_nls_table(param->s_encoding);
+
if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) {
retval = EXT2_ET_UNSUPP_FEATURE;
goto cleanup;
if (super->s_rev_level >= EXT2_DYNAMIC_REV) {
set_field(s_first_ino, EXT2_GOOD_OLD_FIRST_INO);
set_field(s_inode_size, EXT2_GOOD_OLD_INODE_SIZE);
+ if (super->s_inode_size >= sizeof(struct ext2_inode_large)) {
+ int extra_isize = sizeof(struct ext2_inode_large) -
+ EXT2_GOOD_OLD_INODE_SIZE;
+ set_field(s_min_extra_isize, extra_isize);
+ set_field(s_want_extra_isize, extra_isize);
+ }
+ } else {
+ super->s_first_ino = EXT2_GOOD_OLD_FIRST_INO;
+ super->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
}
- set_field(s_checkinterval, EXT2_DFL_CHECKINTERVAL);
+ set_field(s_checkinterval, 0);
super->s_mkfs_time = super->s_lastcheck = fs->now ? fs->now : time(NULL);
super->s_creator_os = CREATOR_OS;
- fs->blocksize = EXT2_BLOCK_SIZE(super);
- fs->fragsize = EXT2_FRAG_SIZE(super);
- frags_per_block = fs->blocksize / fs->fragsize;
-
- /* default: (fs->blocksize*8) blocks/group, up to 2^16 (GDT limit) */
- set_field(s_blocks_per_group, fs->blocksize * 8);
- if (super->s_blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(super))
- super->s_blocks_per_group = EXT2_MAX_BLOCKS_PER_GROUP(super);
- super->s_frags_per_group = super->s_blocks_per_group * frags_per_block;
-
- super->s_blocks_count = param->s_blocks_count;
- super->s_r_blocks_count = param->s_r_blocks_count;
- if (super->s_r_blocks_count >= param->s_blocks_count) {
+ fs->fragsize = fs->blocksize = EXT2_BLOCK_SIZE(super);
+ fs->cluster_ratio_bits = super->s_log_cluster_size -
+ super->s_log_block_size;
+
+ if (bigalloc_flag) {
+ unsigned long long bpg;
+
+ if (param->s_blocks_per_group &&
+ param->s_clusters_per_group &&
+ ((param->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs)) !=
+ param->s_blocks_per_group)) {
+ retval = EXT2_ET_INVALID_ARGUMENT;
+ goto cleanup;
+ }
+ if (param->s_clusters_per_group)
+ assign_field(s_clusters_per_group);
+ else if (param->s_blocks_per_group)
+ super->s_clusters_per_group =
+ param->s_blocks_per_group /
+ EXT2FS_CLUSTER_RATIO(fs);
+ else if (super->s_log_cluster_size + 15 < 32)
+ super->s_clusters_per_group = fs->blocksize * 8;
+ else
+ super->s_clusters_per_group = (fs->blocksize - 1) * 8;
+ if (super->s_clusters_per_group > EXT2_MAX_CLUSTERS_PER_GROUP(super))
+ super->s_clusters_per_group = EXT2_MAX_CLUSTERS_PER_GROUP(super);
+ bpg = EXT2FS_C2B(fs,
+ (unsigned long long) super->s_clusters_per_group);
+ if (bpg >= (((unsigned long long) 1) << 32)) {
+ retval = EXT2_ET_INVALID_ARGUMENT;
+ goto cleanup;
+ }
+ super->s_blocks_per_group = bpg;
+ } else {
+ set_field(s_blocks_per_group, fs->blocksize * 8);
+ if (super->s_blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(super))
+ super->s_blocks_per_group = EXT2_MAX_BLOCKS_PER_GROUP(super);
+ super->s_clusters_per_group = super->s_blocks_per_group;
+ }
+
+ ext2fs_blocks_count_set(super, ext2fs_blocks_count(param) &
+ ~((blk64_t) EXT2FS_CLUSTER_MASK(fs)));
+ ext2fs_r_blocks_count_set(super, ext2fs_r_blocks_count(param));
+ if (ext2fs_r_blocks_count(super) >= ext2fs_blocks_count(param)) {
retval = EXT2_ET_INVALID_ARGUMENT;
goto cleanup;
}
+ set_field(s_mmp_update_interval, 0);
+
/*
* If we're creating an external journal device, we don't need
* to bother with the rest.
*/
- if (super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
+ if (ext2fs_has_feature_journal_dev(super)) {
fs->group_desc_count = 0;
ext2fs_mark_super_dirty(fs);
*ret_fs = fs;
}
retry:
- fs->group_desc_count = ext2fs_div_ceil(super->s_blocks_count -
- super->s_first_data_block,
- EXT2_BLOCKS_PER_GROUP(super));
+ fs->group_desc_count = (dgrp_t) ext2fs_div64_ceil(
+ ext2fs_blocks_count(super) - super->s_first_data_block,
+ EXT2_BLOCKS_PER_GROUP(super));
if (fs->group_desc_count == 0) {
retval = EXT2_ET_TOOSMALL;
goto cleanup;
}
+
+ set_field(s_desc_size,
+ ext2fs_has_feature_64bit(super) ?
+ EXT2_MIN_DESC_SIZE_64BIT : 0);
+
fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
EXT2_DESC_PER_BLOCK(super));
i = fs->blocksize >= 4096 ? 1 : 4096 / fs->blocksize;
- set_field(s_inodes_count, super->s_blocks_count / i);
+
+ if (ext2fs_has_feature_64bit(super) &&
+ (ext2fs_blocks_count(super) / i) >= (1ULL << 32))
+ set_field(s_inodes_count, ~0U);
+ else
+ set_field(s_inodes_count, ext2fs_blocks_count(super) / i);
/*
* Make sure we have at least EXT2_FIRST_INO + 1 inodes, so
*/
if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1)
super->s_inodes_count = EXT2_FIRST_INODE(super)+1;
-
+
/*
* There should be at least as many inodes as the user
* requested. Figure out how many inodes per group that
*/
ipg = ext2fs_div_ceil(super->s_inodes_count, fs->group_desc_count);
if (ipg > fs->blocksize * 8) {
- if (super->s_blocks_per_group >= 256) {
+ if (!bigalloc_flag && super->s_blocks_per_group >= 256) {
/* Try again with slightly different parameters */
super->s_blocks_per_group -= 8;
- super->s_blocks_count = param->s_blocks_count;
- super->s_frags_per_group = super->s_blocks_per_group *
- frags_per_block;
+ ext2fs_blocks_count_set(super,
+ ext2fs_blocks_count(param));
+ super->s_clusters_per_group = super->s_blocks_per_group;
goto retry;
- } else
- return EXT2_ET_TOO_MANY_INODES;
+ } else {
+ retval = EXT2_ET_TOO_MANY_INODES;
+ goto cleanup;
+ }
}
if (ipg > (unsigned) EXT2_MAX_INODES_PER_GROUP(super))
* multiple of 8. This is needed to simplify the bitmap
* splicing code.
*/
+ if (super->s_inodes_per_group < 8)
+ super->s_inodes_per_group = 8;
super->s_inodes_per_group &= ~7;
fs->inode_blocks_per_group = (((super->s_inodes_per_group *
EXT2_INODE_SIZE(super)) +
/*
* check the number of reserved group descriptor table blocks
*/
- if (super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE)
+ if (ext2fs_has_feature_resize_inode(super))
rsv_gdt = calc_reserved_gdt_blocks(fs);
else
rsv_gdt = 0;
retval = EXT2_ET_RES_GDT_BLOCKS;
goto cleanup;
}
+ /* Enable meta_bg if we'd lose more than 3/4 of a BG to GDT blocks. */
+ if (super->s_reserved_gdt_blocks + fs->desc_blocks >
+ super->s_blocks_per_group * 3 / 4) {
+ ext2fs_set_feature_meta_bg(fs->super);
+ ext2fs_clear_feature_resize_inode(fs->super);
+ set_field(s_reserved_gdt_blocks, 0);
+ }
/*
* Calculate the maximum number of bookkeeping blocks per
* table, and the reserved gdt blocks.
*/
overhead = (int) (3 + fs->inode_blocks_per_group +
- fs->desc_blocks + super->s_reserved_gdt_blocks);
+ super->s_reserved_gdt_blocks);
+
+ if (ext2fs_has_feature_meta_bg(fs->super))
+ overhead++;
+ else
+ overhead += fs->desc_blocks;
/* This can only happen if the user requested too many inodes */
- if (overhead > super->s_blocks_per_group)
- return EXT2_ET_TOO_MANY_INODES;
+ if (overhead > super->s_blocks_per_group) {
+ retval = EXT2_ET_TOO_MANY_INODES;
+ goto cleanup;
+ }
/*
* See if the last group is big enough to support the
* backup.
*/
overhead = (int) (2 + fs->inode_blocks_per_group);
- if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1))
+ has_bg = 0;
+ if (ext2fs_has_feature_sparse_super2(super)) {
+ /*
+ * We have to do this manually since
+ * super->s_backup_bgs hasn't been set up yet.
+ */
+ if (fs->group_desc_count == 2)
+ has_bg = param->s_backup_bgs[0] != 0;
+ else
+ has_bg = param->s_backup_bgs[1] != 0;
+ } else
+ has_bg = ext2fs_bg_has_super(fs, fs->group_desc_count - 1);
+ if (has_bg)
overhead += 1 + fs->desc_blocks + super->s_reserved_gdt_blocks;
- rem = ((super->s_blocks_count - super->s_first_data_block) %
+ rem = ((ext2fs_blocks_count(super) - super->s_first_data_block) %
super->s_blocks_per_group);
- if ((fs->group_desc_count == 1) && rem && (rem < overhead))
- return EXT2_ET_TOOSMALL;
+ if ((fs->group_desc_count == 1) && rem && (rem < overhead)) {
+ retval = EXT2_ET_TOOSMALL;
+ goto cleanup;
+ }
if (rem && (rem < overhead+50)) {
- super->s_blocks_count -= rem;
+ ext2fs_blocks_count_set(super, ext2fs_blocks_count(super) -
+ rem);
+ /*
+ * If blocks count is changed, we need to recalculate
+ * reserved blocks count not to exceed 50%.
+ */
+ reserved_ratio = 100.0 * ext2fs_r_blocks_count(param) /
+ ext2fs_blocks_count(param);
+ ext2fs_r_blocks_count_set(super, reserved_ratio *
+ ext2fs_blocks_count(super) / 100.0);
+
goto retry;
}
* count.
*/
+ /* Set up the locations of the backup superblocks */
+ if (ext2fs_has_feature_sparse_super2(super)) {
+ if (super->s_backup_bgs[0] >= fs->group_desc_count)
+ super->s_backup_bgs[0] = fs->group_desc_count - 1;
+ if (super->s_backup_bgs[1] >= fs->group_desc_count)
+ super->s_backup_bgs[1] = fs->group_desc_count - 1;
+ if (super->s_backup_bgs[0] == super->s_backup_bgs[1])
+ super->s_backup_bgs[1] = 0;
+ if (super->s_backup_bgs[0] > super->s_backup_bgs[1]) {
+ __u32 t = super->s_backup_bgs[0];
+ super->s_backup_bgs[0] = super->s_backup_bgs[1];
+ super->s_backup_bgs[1] = t;
+ }
+ }
+
retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf);
if (retval)
goto cleanup;
-
- sprintf(buf, "block bitmap for %s", fs->device_name);
- retval = ext2fs_allocate_block_bitmap(fs, buf, &fs->block_map);
+
+ strcpy(buf, "block bitmap for ");
+ strcat(buf, fs->device_name);
+ retval = ext2fs_allocate_subcluster_bitmap(fs, buf, &fs->block_map);
if (retval)
goto cleanup;
-
- sprintf(buf, "inode bitmap for %s", fs->device_name);
+
+ strcpy(buf, "inode bitmap for ");
+ strcat(buf, fs->device_name);
retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map);
if (retval)
goto cleanup;
ext2fs_free_mem(&buf);
- retval = ext2fs_get_mem((size_t) fs->desc_blocks * fs->blocksize,
+ retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
&fs->group_desc);
if (retval)
goto cleanup;
* Note that although the block bitmap, inode bitmap, and
* inode table have not been allocated (and in fact won't be
* by this routine), they are accounted for nevertheless.
+ *
+ * If FLEX_BG meta-data grouping is used, only account for the
+ * superblock and group descriptors (the inode tables and
+ * bitmaps will be accounted for when allocated).
*/
- super->s_free_blocks_count = 0;
+ free_blocks = 0;
+ csum_flag = ext2fs_has_group_desc_csum(fs);
+ reserved_inos = super->s_first_ino;
for (i = 0; i < fs->group_desc_count; i++) {
+ /*
+ * Don't set the BLOCK_UNINIT group for the last group
+ * because the block bitmap needs to be padded.
+ */
+ if (csum_flag) {
+ if (i != fs->group_desc_count - 1)
+ ext2fs_bg_flags_set(fs, i,
+ EXT2_BG_BLOCK_UNINIT);
+ ext2fs_bg_flags_set(fs, i, EXT2_BG_INODE_UNINIT);
+ numblocks = super->s_inodes_per_group;
+ if (reserved_inos) {
+ if (numblocks > reserved_inos) {
+ numblocks -= reserved_inos;
+ reserved_inos = 0;
+ } else {
+ reserved_inos -= numblocks;
+ numblocks = 0;
+ }
+ }
+ ext2fs_bg_itable_unused_set(fs, i, numblocks);
+ }
numblocks = ext2fs_reserve_super_and_bgd(fs, i, fs->block_map);
-
- super->s_free_blocks_count += numblocks;
- fs->group_desc[i].bg_free_blocks_count = numblocks;
- fs->group_desc[i].bg_free_inodes_count =
- fs->super->s_inodes_per_group;
- fs->group_desc[i].bg_used_dirs_count = 0;
+ if (fs->super->s_log_groups_per_flex)
+ numblocks += 2 + fs->inode_blocks_per_group;
+
+ free_blocks += numblocks;
+ ext2fs_bg_free_blocks_count_set(fs, i, numblocks);
+ ext2fs_bg_free_inodes_count_set(fs, i, fs->super->s_inodes_per_group);
+ ext2fs_bg_used_dirs_count_set(fs, i, 0);
+ ext2fs_group_desc_csum_set(fs, i);
}
-
+ free_blocks &= ~EXT2FS_CLUSTER_MASK(fs);
+ ext2fs_free_blocks_count_set(super, free_blocks);
+
c = (char) 255;
if (((int) c) == -1) {
super->s_flags |= EXT2_FLAGS_SIGNED_HASH;
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
ext2fs_mark_ib_dirty(fs);
-
+
io_channel_set_blksize(fs->io, fs->blocksize);
*ret_fs = fs;
return 0;
cleanup:
+ free(buf);
ext2fs_free(fs);
return retval;
}
git://git.whamcloud.com / tools / e2fsprogs.git / blobdiff