/*
* 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%
*/
#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.
{
struct ext2_super_block *sb = fs->super;
unsigned long bpg = sb->s_blocks_per_group;
- unsigned int gdpb = fs->blocksize / sizeof(struct ext2_group_desc);
+ unsigned int gdpb = EXT2_DESC_PER_BLOCK(sb);
unsigned long max_blocks = 0xffffffff;
unsigned long rsv_groups;
unsigned int rsv_gdb;
*/
if (sb->s_blocks_count < max_blocks / 1024)
max_blocks = sb->s_blocks_count * 1024;
- rsv_groups = (max_blocks - sb->s_first_data_block + bpg - 1) / bpg;
- rsv_gdb = (rsv_groups + gdpb - 1) / gdpb - fs->desc_blocks;
+ 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))
rsv_gdb = EXT2_ADDR_PER_BLOCK(sb);
#ifdef RES_GDT_DEBUG
ext2_filsys fs;
errcode_t retval;
struct ext2_super_block *super;
- int frags_per_block;
unsigned int rem;
unsigned int overhead = 0;
- blk_t group_block;
unsigned int ipg;
dgrp_t i;
blk_t numblocks;
int rsv_gdt;
+ int csum_flag;
int io_flags;
- char *buf;
+ char *buf = 0;
+ char c;
if (!param || !param->s_blocks_count)
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;
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_log_cluster_size, 0);
set_field(s_first_data_block, super->s_log_block_size ? 0 : 1);
- set_field(s_max_mnt_count, EXT2_DFL_MAX_MNT_COUNT);
+ 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);
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;
+ fs->clustersize = EXT2_CLUSTER_SIZE(super);
/* 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_clusters_per_group = super->s_blocks_per_group;
+
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) {
}
retry:
- fs->group_desc_count = (super->s_blocks_count -
- super->s_first_data_block +
- EXT2_BLOCKS_PER_GROUP(super) - 1)
- / EXT2_BLOCKS_PER_GROUP(super);
+ fs->group_desc_count = ext2fs_div_ceil(super->s_blocks_count -
+ super->s_first_data_block,
+ EXT2_BLOCKS_PER_GROUP(super));
if (fs->group_desc_count == 0) {
retval = EXT2_ET_TOOSMALL;
goto cleanup;
}
- fs->desc_blocks = (fs->group_desc_count +
- EXT2_DESC_PER_BLOCK(super) - 1)
- / EXT2_DESC_PER_BLOCK(super);
+ 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 (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
* should be. But make sure that we don't allocate more than
* one bitmap's worth of inodes each group.
*/
- ipg = (super->s_inodes_count + fs->group_desc_count - 1) /
- fs->group_desc_count;
+ ipg = ext2fs_div_ceil(super->s_inodes_count, fs->group_desc_count);
if (ipg > fs->blocksize * 8) {
if (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;
+ 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))
ipg = EXT2_MAX_INODES_PER_GROUP(super);
+ipg_retry:
super->s_inodes_per_group = ipg;
- if (super->s_inodes_count > ipg * fs->group_desc_count)
- super->s_inodes_count = ipg * fs->group_desc_count;
/*
* Make sure the number of inodes per group completely fills
/*
* adjust inode count to reflect the adjusted inodes_per_group
*/
+ if ((__u64)super->s_inodes_per_group * fs->group_desc_count > ~0U) {
+ ipg--;
+ goto ipg_retry;
+ }
super->s_inodes_count = super->s_inodes_per_group *
fs->group_desc_count;
super->s_free_inodes_count = super->s_inodes_count;
}
/*
- * Overhead is the number of bookkeeping blocks per group. It
- * includes the superblock backup, the group descriptor
- * backups, the inode bitmap, the block bitmap, and the inode
- * table.
+ * Calculate the maximum number of bookkeeping blocks per
+ * group. It includes the superblock, the block group
+ * descriptors, the block bitmap, the inode bitmap, the inode
+ * table, and the reserved gdt blocks.
*/
-
- overhead = (int) (2 + fs->inode_blocks_per_group);
-
- if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1))
- overhead += 1 + fs->desc_blocks + super->s_reserved_gdt_blocks;
+ overhead = (int) (3 + fs->inode_blocks_per_group +
+ fs->desc_blocks + super->s_reserved_gdt_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
* necessary data structures. If not, we need to get rid of
- * it.
+ * it. We need to recalculate the overhead for the last block
+ * group, since it might or might not have a superblock
+ * backup.
*/
+ overhead = (int) (2 + fs->inode_blocks_per_group);
+ if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1))
+ overhead += 1 + fs->desc_blocks + super->s_reserved_gdt_blocks;
rem = ((super->s_blocks_count - 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;
goto retry;
retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf);
if (retval)
goto cleanup;
-
- sprintf(buf, "block bitmap for %s", fs->device_name);
+
+ strcpy(buf, "block bitmap for ");
+ strcat(buf, fs->device_name);
retval = ext2fs_allocate_block_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).
*/
- group_block = super->s_first_data_block;
super->s_free_blocks_count = 0;
+ csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
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)
+ fs->group_desc[i].bg_flags |=
+ EXT2_BG_BLOCK_UNINIT;
+ fs->group_desc[i].bg_flags |= EXT2_BG_INODE_UNINIT;
+ numblocks = super->s_inodes_per_group;
+ if (i == 0)
+ numblocks -= super->s_first_ino;
+ fs->group_desc[i].bg_itable_unused = numblocks;
+ }
numblocks = ext2fs_reserve_super_and_bgd(fs, i, fs->block_map);
+ if (fs->super->s_log_groups_per_flex)
+ numblocks += 2 + fs->inode_blocks_per_group;
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;
-
- group_block += super->s_blocks_per_group;
+ ext2fs_group_desc_csum_set(fs, i);
}
-
+
+ c = (char) 255;
+ if (((int) c) == -1) {
+ super->s_flags |= EXT2_FLAGS_SIGNED_HASH;
+ } else {
+ super->s_flags |= EXT2_FLAGS_UNSIGNED_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