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-rw-r--r--e2fslib/initialize.c326
1 files changed, 0 insertions, 326 deletions
diff --git a/e2fslib/initialize.c b/e2fslib/initialize.c
deleted file mode 100644
index 821036e..0000000
--- a/e2fslib/initialize.c
+++ /dev/null
@@ -1,326 +0,0 @@
-/*
- * 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.
- * %End-Header%
- */
-
-#include <stdio.h>
-#include <string.h>
-#if HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <fcntl.h>
-#include <time.h>
-#if HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-#if HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-
-#include "ext2_fs.h"
-#include "ext2fs.h"
-
-#if defined(__linux__) && defined(EXT2_OS_LINUX)
-#define CREATOR_OS EXT2_OS_LINUX
-#elif defined(__GNU__) && defined(EXT2_OS_HURD)
-#define CREATOR_OS EXT2_OS_HURD
-#elif defined(__FreeBSD__) && defined(EXT2_OS_FREEBSD)
-#define CREATOR_OS EXT2_OS_FREEBSD
-#elif defined(LITES) && defined(EXT2_OS_LITES)
-#define CREATOR_OS EXT2_OS_LITES
-#else
-#define CREATOR_OS EXT2_OS_LINUX /* by default */
-#endif
-
-/*
- * 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)
-
-errcode_t ext2fs_initialize(const char *name, int flags,
- struct ext2_super_block *param,
- io_manager manager, ext2_filsys *ret_fs)
-{
- ext2_filsys fs;
- errcode_t retval;
- struct ext2_super_block *super;
- int frags_per_block;
- int rem;
- int overhead = 0;
- blk_t group_block;
- int i, j;
- blk_t numblocks;
- char *buf;
-
- if (!param || !param->s_blocks_count)
- return EXT2_ET_INVALID_ARGUMENT;
-
- retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys),
- (void **) &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;
-#ifdef WORDS_BIGENDIAN
- fs->flags |= EXT2_FLAG_SWAP_BYTES;
-#endif
- retval = manager->open(name, IO_FLAG_RW, &fs->io);
- if (retval)
- goto cleanup;
- fs->io->app_data = fs;
- retval = ext2fs_get_mem(strlen(name)+1, (void **) &fs->device_name);
- if (retval)
- goto cleanup;
-
- strcpy(fs->device_name, name);
- retval = ext2fs_get_mem(SUPERBLOCK_SIZE, (void **) &super);
- if (retval)
- goto cleanup;
- fs->super = super;
-
- memset(super, 0, SUPERBLOCK_SIZE);
-
-#define set_field(field, default) (super->field = param->field ? \
- param->field : (default))
-
- 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);
- 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);
- if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)
- return EXT2_ET_UNSUPP_FEATURE;
- if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP)
- return EXT2_ET_RO_UNSUPP_FEATURE;
-
- set_field(s_rev_level, EXT2_GOOD_OLD_REV);
- 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);
- }
-
- set_field(s_checkinterval, EXT2_DFL_CHECKINTERVAL);
- super->s_lastcheck = 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 */
- set_field(s_blocks_per_group, fs->blocksize*8);
- 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) {
- retval = EXT2_ET_INVALID_ARGUMENT;
- goto cleanup;
- }
-
- /*
- * 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) {
- fs->group_desc_count = 0;
- ext2fs_mark_super_dirty(fs);
- *ret_fs = fs;
- return 0;
- }
-
-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);
- if (fs->group_desc_count == 0)
- return EXT2_ET_TOOSMALL;
- fs->desc_blocks = (fs->group_desc_count +
- EXT2_DESC_PER_BLOCK(super) - 1)
- / EXT2_DESC_PER_BLOCK(super);
-
- /* n.b., fs->blocksize is <= 4096 */
- set_field(s_inodes_count, super->s_blocks_count/(4096/fs->blocksize));
-
- /*
- * Make sure we have at least EXT2_FIRST_INO + 1 inodes, so
- * that we have enough inodes for the filesystem(!)
- */
- 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
- */
- super->s_inodes_per_group = (super->s_inodes_count +
- fs->group_desc_count - 1) /
- fs->group_desc_count;
- if (super->s_inodes_per_group > fs->blocksize*8)
- super->s_inodes_per_group = fs->blocksize*8;
-
- /*
- * Make sure the number of inodes per group completely fills
- * the inode table blocks in the descriptor. If not, add some
- * additional inodes/group. Waste not, want not...
- */
- fs->inode_blocks_per_group = (((super->s_inodes_per_group *
- EXT2_INODE_SIZE(super)) +
- EXT2_BLOCK_SIZE(super) - 1) /
- EXT2_BLOCK_SIZE(super));
- super->s_inodes_per_group = ((fs->inode_blocks_per_group *
- EXT2_BLOCK_SIZE(super)) /
- EXT2_INODE_SIZE(super));
- /*
- * Finally, make sure the number of inodes per group is a
- * multiple of 8. This is needed to simplify the bitmap
- * splicing code.
- */
- super->s_inodes_per_group &= ~7;
- fs->inode_blocks_per_group = (((super->s_inodes_per_group *
- EXT2_INODE_SIZE(super)) +
- EXT2_BLOCK_SIZE(super) - 1) /
- EXT2_BLOCK_SIZE(super));
-
- /*
- * adjust inode count to reflect the adjusted inodes_per_group
- */
- 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.
- *
- * XXX Not all block groups need the descriptor blocks, but
- * being clever is tricky...
- */
- overhead = (int) (3 + fs->desc_blocks + fs->inode_blocks_per_group);
-
- /*
- * See if the last group is big enough to support the
- * necessary data structures. If not, we need to get rid of
- * it.
- */
- rem = (int) ((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 (rem && (rem < overhead+50)) {
- super->s_blocks_count -= rem;
- goto retry;
- }
-
- /*
- * At this point we know how big the filesystem will be. So
- * we can do any and all allocations that depend on the block
- * count.
- */
-
- retval = ext2fs_get_mem(strlen(fs->device_name) + 80,
- (void **) &buf);
- if (retval)
- goto cleanup;
-
- sprintf(buf, "block bitmap for %s", 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);
- retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map);
- if (retval)
- goto cleanup;
-
- ext2fs_free_mem((void **) &buf);
-
- retval = ext2fs_get_mem((size_t) fs->desc_blocks * fs->blocksize,
- (void **) &fs->group_desc);
- if (retval)
- goto cleanup;
-
- memset(fs->group_desc, 0, (size_t) fs->desc_blocks * fs->blocksize);
-
- /*
- * Reserve the superblock and group descriptors for each
- * group, and fill in the correct group statistics for group.
- * 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.
- */
- group_block = super->s_first_data_block;
- super->s_free_blocks_count = 0;
- for (i = 0; i < fs->group_desc_count; i++) {
- if (i == fs->group_desc_count-1) {
- numblocks = (fs->super->s_blocks_count -
- fs->super->s_first_data_block) %
- fs->super->s_blocks_per_group;
- if (!numblocks)
- numblocks = fs->super->s_blocks_per_group;
- } else
- numblocks = fs->super->s_blocks_per_group;
-
- if (ext2fs_bg_has_super(fs, i)) {
- for (j=0; j < fs->desc_blocks+1; j++)
- ext2fs_mark_block_bitmap(fs->block_map,
- group_block + j);
- numblocks -= 1 + fs->desc_blocks;
- }
-
- 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_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:
- ext2fs_free(fs);
- return retval;
-}
-
-
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 23:20:48 +0000