void e2fsck_read_bitmaps(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
errcode_t retval;
const char *old_op;
unsigned int save_type;
if (ctx->invalid_bitmaps) {
com_err(ctx->program_name, 0,
_("e2fsck_read_bitmaps: illegal bitmap block(s) for %s"),
ctx->device_name);
fatal_error(ctx, 0);
}
old_op = ehandler_operation(_("reading inode and block bitmaps"));
e2fsck_set_bitmap_type(fs, EXT2FS_BMAP64_RBTREE, "fs_bitmaps",
&save_type);
ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
retval = ext2fs_read_bitmaps(fs);
ctx->fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
fs->default_bitmap_type = save_type;
ehandler_operation(old_op);
if (retval) {
com_err(ctx->program_name, retval,
_("while retrying to read bitmaps for %s"),
ctx->device_name);
fatal_error(ctx, 0);
}
}
static void move_quota_inode(ext2_filsys fs, ext2_ino_t from_ino,
ext2_ino_t to_ino, int qtype)
{
struct ext2_inode inode;
char qf_name[QUOTA_NAME_LEN];
/* We need the inode bitmap to be loaded */
if (ext2fs_read_bitmaps(fs))
return;
if (ext2fs_read_inode(fs, from_ino, &inode))
return;
inode.i_links_count = 1;
inode.i_mode = LINUX_S_IFREG | 0600;
inode.i_flags = EXT2_IMMUTABLE_FL;
if (fs->super->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_EXTENTS)
inode.i_flags |= EXT4_EXTENTS_FL;
ext2fs_write_new_inode(fs, to_ino, &inode);
/* unlink the old inode */
quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0);
ext2fs_inode_alloc_stats(fs, from_ino, -1);
/* Clear out the original inode in the inode-table block. */
memset(&inode, 0, sizeof(struct ext2_inode));
ext2fs_write_inode(fs, from_ino, &inode);
}
void * op_init (struct fuse_conn_info *conn)
{
errcode_t rc;
struct fuse_context *cntx=fuse_get_context();
struct extfs_data *e2data=cntx->private_data;
debugf("enter %s", e2data->device);
rc = ext2fs_open(e2data->device,
(e2data->readonly) ? 0 : EXT2_FLAG_RW,
0, 0, unix_io_manager, &e2data->e2fs);
if (rc) {
debugf("Error while trying to open %s", e2data->device);
exit(1);
}
#if 1
if (e2data->readonly != 1)
#endif
rc = ext2fs_read_bitmaps(e2data->e2fs);
if (rc) {
debugf("Error while reading bitmaps");
ext2fs_close(e2data->e2fs);
exit(1);
}
debugf("FileSystem %s", (e2data->e2fs->flags & EXT2_FLAG_RW) ? "Read&Write" : "ReadOnly");
debugf("leave");
return e2data;
}
errcode_t quota_remove_inode(ext2_filsys fs, int qtype)
{
ext2_ino_t qf_ino;
errcode_t retval;
retval = ext2fs_read_bitmaps(fs);
if (retval) {
log_err("Couldn't read bitmaps: %s", error_message(retval));
return retval;
}
qf_ino = (qtype == USRQUOTA) ? fs->super->s_usr_quota_inum :
fs->super->s_grp_quota_inum;
quota_set_sb_inum(fs, 0, qtype);
/* Truncate the inode only if its a reserved one. */
if (qf_ino < EXT2_FIRST_INODE(fs->super))
quota_inode_truncate(fs, qf_ino);
ext2fs_mark_super_dirty(fs);
fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
retval = ext2fs_write_bitmaps(fs);
if (retval) {
log_err("Couldn't write bitmaps: %s", error_message(retval));
return retval;
}
return 0;
}
errcode_t quota_write_inode(quota_ctx_t qctx, int qtype)
{
int retval = 0, i;
dict_t *dict;
ext2_filsys fs;
struct quota_handle *h = NULL;
int fmt = QFMT_VFS_V1;
if (!qctx)
return 0;
fs = qctx->fs;
retval = ext2fs_get_mem(sizeof(struct quota_handle), &h);
if (retval) {
log_err("Unable to allocate quota handle", "");
goto out;
}
ext2fs_read_bitmaps(fs);
for (i = 0; i < MAXQUOTAS; i++) {
if ((qtype != -1) && (i != qtype))
continue;
dict = qctx->quota_dict[i];
if (!dict)
continue;
retval = quota_file_create(h, fs, i, fmt);
if (retval < 0) {
log_err("Cannot initialize io on quotafile", "");
continue;
}
write_dquots(dict, h);
retval = quota_file_close(h);
if (retval < 0) {
log_err("Cannot finish IO on new quotafile: %s",
strerror(errno));
if (h->qh_qf.e2_file)
ext2fs_file_close(h->qh_qf.e2_file);
quota_inode_truncate(fs, h->qh_qf.ino);
continue;
}
/* Set quota inode numbers in superblock. */
quota_set_sb_inum(fs, h->qh_qf.ino, i);
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
}
ext2fs_write_bitmaps(fs);
out:
if (h)
ext2fs_free_mem(&h);
return retval;
}
static errcode_t ext3u_write_inode(ext2_filsys fs, ext2_ino_t undel_ino, int flags)
{
char *buf;
errcode_t retval;
struct ext2_inode inode;
struct mk_ext3u_struct es;
__u32 num_blocks = ext3u_fifo_reserved + ext3u_skip_reserved + ext3u_index_reserved + 1;
if ((retval = ext3u_create_superblock(fs, flags, &buf)))
return retval;
if ((retval = ext2fs_read_bitmaps(fs)))
return retval;
if ((retval = ext2fs_read_inode(fs, undel_ino, &inode)))
return retval;
if (inode.i_blocks > 0)
return EEXIST;
es.goal = 0;
es.num_blocks = num_blocks;
es.newblocks = 0;
es.buf = buf;
es.err = 0;
es.zero_count = 0;
retval = ext2fs_block_iterate2(fs, undel_ino, BLOCK_FLAG_APPEND, 0, mk_ext3u_proc, &es);
if (es.err) {
retval = es.err;
goto errout;
}
if (es.zero_count) {
retval = ext2fs_zero_blocks(fs, es.blk_to_zero, es.zero_count, 0, 0);
if (retval)
goto errout;
}
if ((retval = ext2fs_read_inode(fs, undel_ino, &inode)))
goto errout;
inode.i_size += fs->blocksize * num_blocks;
ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
inode.i_links_count = 1;
inode.i_mode = LINUX_S_IFREG | 0600;
if ((retval = ext2fs_write_inode(fs, undel_ino, &inode)))
goto errout;
retval = 0;
errout:
ext2fs_free_mem(&buf);
return retval;
}
/*
* This function creates a journal using direct I/O routines.
*/
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
blk_t size, int flags)
{
char *buf;
errcode_t retval;
struct ext2_inode inode;
struct mkjournal_struct es;
if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf)))
return retval;
if ((retval = ext2fs_read_bitmaps(fs)))
return retval;
if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
return retval;
if (inode.i_blocks > 0)
return EEXIST;
es.num_blocks = size;
es.newblocks = 0;
es.buf = buf;
es.err = 0;
retval = ext2fs_block_iterate2(fs, journal_ino, BLOCK_FLAG_APPEND,
0, mkjournal_proc, &es);
if (es.err) {
retval = es.err;
goto errout;
}
if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
goto errout;
inode.i_size += fs->blocksize * size;
inode.i_blocks += (fs->blocksize / 512) * es.newblocks;
inode.i_mtime = inode.i_ctime = time(0);
inode.i_links_count = 1;
inode.i_mode = LINUX_S_IFREG | 0600;
if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
goto errout;
retval = 0;
memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
fs->super->s_jnl_blocks[16] = inode.i_size;
fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
ext2fs_mark_super_dirty(fs);
errout:
ext2fs_free_mem(&buf);
return retval;
}
errcode_t write_quota_inode(quota_ctx_t qctx, int qtype)
{
int retval, i;
unsigned long qf_inums[MAXQUOTAS];
struct dquot *dquot;
dict_t *dict;
ext2_filsys fs;
struct quota_handle *h;
int fmt = QFMT_VFS_V1;
if (!qctx)
return;
fs = qctx->fs;
h = smalloc(sizeof(struct quota_handle));
ext2fs_read_bitmaps(fs);
for (i = 0; i < MAXQUOTAS; i++) {
if ((qtype != -1) && (i != qtype))
continue;
dict = qctx->quota_dict[i];
if (!dict)
continue;
retval = new_io(h, fs, i, fmt);
if (retval < 0) {
log_err("Cannot initialize io on quotafile", "");
continue;
}
write_dquots(dict, h);
retval = end_io(h);
if (retval < 0) {
log_err("Cannot finish IO on new quotafile: %s",
strerror(errno));
if (h->qh_qf.e2_file)
ext2fs_file_close(h->qh_qf.e2_file);
truncate_quota_inode(fs, h->qh_qf.ino);
continue;
}
/* Set quota inode numbers in superblock. */
set_sb_quota_inum(fs, h->qh_qf.ino, i);
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
}
ext2fs_write_bitmaps(fs);
out:
free(h);
return retval;
}
errcode_t quota_remove_inode(ext2_filsys fs, int qtype)
{
ext2_ino_t qf_ino;
ext2fs_read_bitmaps(fs);
qf_ino = (qtype == USRQUOTA) ? fs->super->s_usr_quota_inum :
fs->super->s_grp_quota_inum;
quota_set_sb_inum(fs, 0, qtype);
/* Truncate the inode only if its a reserved one. */
if (qf_ino < EXT2_FIRST_INODE(fs->super))
quota_inode_truncate(fs, qf_ino);
ext2fs_mark_super_dirty(fs);
ext2fs_write_bitmaps(fs);
return 0;
}
int main(int argc, char **argv) {
ext2_filsys fs;
ext2fs_generic_bitmap bitmap;
size_t size;
ext2fs_open(argv[1], 0, 0, 0, unix_io_manager, &fs);
ext2fs_read_bitmaps(fs);
ext2fs_get_mem(sizeof(struct ext2fs_struct_generic_bitmap), &bitmap);
memcpy(bitmap, fs->block_map, sizeof(struct ext2fs_struct_generic_bitmap));
size = (size_t) (((bitmap->real_end - bitmap->start) / 8) + 1);
printf("sBlock: %u\n", fs->blocksize);
printf("sBitmap: %u\n", bitmap->real_end - bitmap->start + 1);
printf("bitmap: ");
fwrite(bitmap->bitmap, 1, size, stdout);
ext2fs_close(fs);
return 0;
}
errcode_t quota_remove_inode(ext2_filsys fs, enum quota_type qtype)
{
ext2_ino_t qf_ino;
errcode_t retval;
retval = ext2fs_read_bitmaps(fs);
if (retval) {
log_debug("Couldn't read bitmaps: %s", error_message(retval));
return retval;
}
qf_ino = *quota_sb_inump(fs->super, qtype);
if (qf_ino == 0)
return 0;
retval = quota_inode_truncate(fs, qf_ino);
if (retval)
return retval;
if (qf_ino >= EXT2_FIRST_INODE(fs->super)) {
struct ext2_inode inode;
retval = ext2fs_read_inode(fs, qf_ino, &inode);
if (!retval) {
memset(&inode, 0, sizeof(struct ext2_inode));
ext2fs_write_inode(fs, qf_ino, &inode);
}
ext2fs_inode_alloc_stats2(fs, qf_ino, -1, 0);
ext2fs_mark_ib_dirty(fs);
}
quota_set_sb_inum(fs, 0, qtype);
ext2fs_mark_super_dirty(fs);
fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
retval = ext2fs_write_bitmaps(fs);
if (retval) {
log_debug("Couldn't write bitmaps: %s", error_message(retval));
return retval;
}
return 0;
}
static void move_quota_inode(ext2_filsys fs, ext2_ino_t from_ino,
ext2_ino_t to_ino, enum quota_type qtype)
{
struct ext2_inode inode;
errcode_t retval;
char qf_name[QUOTA_NAME_LEN];
/* We need the inode bitmap to be loaded */
if (ext2fs_read_bitmaps(fs))
return;
retval = ext2fs_read_inode(fs, from_ino, &inode);
if (retval) {
com_err("ext2fs_read_inode", retval, "%s",
_("in move_quota_inode"));
return;
}
inode.i_links_count = 1;
inode.i_mode = LINUX_S_IFREG | 0600;
inode.i_flags = EXT2_IMMUTABLE_FL;
if (ext2fs_has_feature_extents(fs->super))
inode.i_flags |= EXT4_EXTENTS_FL;
retval = ext2fs_write_new_inode(fs, to_ino, &inode);
if (retval) {
com_err("ext2fs_write_new_inode", retval, "%s",
_("in move_quota_inode"));
return;
}
/* unlink the old inode */
quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name);
ext2fs_unlink(fs, EXT2_ROOT_INO, qf_name, from_ino, 0);
ext2fs_inode_alloc_stats(fs, from_ino, -1);
/* Clear out the original inode in the inode-table block. */
memset(&inode, 0, sizeof(struct ext2_inode));
ext2fs_write_inode(fs, from_ino, &inode);
}
void e2fsck_read_bitmaps(e2fsck_t ctx)
{
ext2_filsys fs = ctx->fs;
errcode_t retval;
if (ctx->invalid_bitmaps) {
com_err(ctx->program_name, 0,
_("e2fsck_read_bitmaps: illegal bitmap block(s) for %s"),
ctx->device_name);
fatal_error(ctx, 0);
}
ehandler_operation(_("reading inode and block bitmaps"));
retval = ext2fs_read_bitmaps(fs);
ehandler_operation(0);
if (retval) {
com_err(ctx->program_name, retval,
_("while retrying to read bitmaps for %s"),
ctx->device_name);
fatal_error(ctx, 0);
}
}
/*
* This function creates a journal using direct I/O routines.
*/
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
blk_t num_blocks, blk64_t goal, int flags)
{
char *buf;
errcode_t retval;
struct ext2_inode inode;
unsigned long long inode_size;
struct mkjournal_struct es;
if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
&buf)))
return retval;
if ((retval = ext2fs_read_bitmaps(fs)))
goto out2;
if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
goto out2;
if (inode.i_blocks > 0) {
retval = EEXIST;
goto out2;
}
es.num_blocks = num_blocks;
es.newblocks = 0;
es.buf = buf;
es.err = 0;
es.flags = flags;
es.zero_count = 0;
es.goal = (goal != ~0ULL) ? goal : get_midpoint_journal_block(fs);
if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
inode.i_flags |= EXT4_EXTENTS_FL;
if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
goto out2;
}
retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND,
0, mkjournal_proc, &es);
if (retval)
goto out2;
if (es.err) {
retval = es.err;
goto out2;
}
if (es.zero_count) {
retval = ext2fs_zero_blocks2(fs, es.blk_to_zero,
es.zero_count, 0, 0);
if (retval)
goto out2;
}
if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
goto out2;
inode_size = (unsigned long long)fs->blocksize * num_blocks;
ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
inode.i_links_count = 1;
inode.i_mode = LINUX_S_IFREG | 0600;
retval = ext2fs_inode_size_set(fs, &inode, inode_size);
if (retval)
goto out2;
if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
goto out2;
retval = 0;
memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
fs->super->s_jnl_blocks[15] = inode.i_size_high;
fs->super->s_jnl_blocks[16] = inode.i_size;
fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
ext2fs_mark_super_dirty(fs);
out2:
ext2fs_free_mem(&buf);
return retval;
}
/// readbitmap - cread and heck bitmap, reference dumpe2fs
extern void readbitmap(char* device, image_head image_hdr, unsigned long* bitmap, int pui){
errcode_t retval;
unsigned long group;
unsigned long long current_block, block;
unsigned long long free, gfree;
char *block_bitmap=NULL;
int block_nbytes;
unsigned long long blk_itr;
int bg_flags = 0;
int start = 0;
int bit_size = 1;
int B_UN_INIT = 0;
int ext4_gfree_mismatch = 0;
log_mesg(2, 0, 0, fs_opt.debug, "%s: readbitmap %p\n", __FILE__, bitmap);
fs_open(device);
retval = ext2fs_read_bitmaps(fs); /// open extfs bitmap
if (retval)
log_mesg(0, 1, 1, fs_opt.debug, "%s: Couldn't find valid filesystem bitmap.\n", __FILE__);
block_nbytes = EXT2_BLOCKS_PER_GROUP(fs->super) / 8;
if (fs->block_map)
block_bitmap = malloc(block_nbytes);
/// initial image bitmap as 1 (all block are used)
memset(bitmap, 0xFF, sizeof(unsigned long)*LONGS(image_hdr.totalblock));
free = 0;
current_block = 0;
blk_itr = fs->super->s_first_data_block;
/// init progress
progress_bar prog; /// progress_bar structure defined in progress.h
progress_init(&prog, start, image_hdr.totalblock, image_hdr.totalblock, BITMAP, bit_size);
/// each group
for (group = 0; group < fs->group_desc_count; group++) {
gfree = 0;
B_UN_INIT = 0;
if (block_bitmap) {
ext2fs_get_block_bitmap_range(fs->block_map, blk_itr, block_nbytes << 3, block_bitmap);
if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM){
#ifdef EXTFS_1_41
bg_flags = fs->group_desc[group].bg_flags;
#else
bg_flags = ext2fs_bg_flags(fs, group);
#endif
if (bg_flags&EXT2_BG_BLOCK_UNINIT){
log_mesg(1, 0, 0, fs_opt.debug, "%s: BLOCK_UNINIT for group %lu\n", __FILE__, group);
B_UN_INIT = 1;
} else {
log_mesg(2, 0, 0, fs_opt.debug, "%s: BLOCK_INIT for group %lu\n", __FILE__, group);
}
}
/// each block in group
for (block = 0; ((block < fs->super->s_blocks_per_group) && (current_block < (image_hdr.totalblock-1))); block++) {
current_block = block + blk_itr;
/// check block is used or not
if ((!in_use (block_bitmap, block)) || (B_UN_INIT)) {
free++;
gfree++;
pc_clear_bit(current_block, bitmap);
log_mesg(3, 0, 0, fs_opt.debug, "%s: free block %llu at group %lu init %i\n", __FILE__, current_block, group, (int)B_UN_INIT);
} else {
pc_set_bit(current_block, bitmap);
log_mesg(3, 0, 0, fs_opt.debug, "%s: used block %llu at group %lu\n", __FILE__, current_block, group);
}
/// update progress
update_pui(&prog, current_block, current_block, 0);//keep update
}
blk_itr += fs->super->s_blocks_per_group;
}
/// check free blocks in group
#ifdef EXTFS_1_41
if (gfree != fs->group_desc[group].bg_free_blocks_count){
#else
if (gfree != ext2fs_bg_free_blocks_count(fs, group)){
#endif
if (!B_UN_INIT)
log_mesg(0, 1, 1, fs_opt.debug, "%s: bitmap error at %lu group.\n", __FILE__, group);
else
ext4_gfree_mismatch = 1;
}
}
/// check all free blocks in partition
if (free != fs->super->s_free_blocks_count) {
if ((fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) && (ext4_gfree_mismatch))
log_mesg(1, 0, 0, fs_opt.debug, "%s: EXT4 bitmap metadata mismatch\n", __FILE__);
else
log_mesg(0, 1, 1, fs_opt.debug, "%s: bitmap free count err, free:%llu\n", __FILE__, free);
}
fs_close();
/// update progress
update_pui(&prog, 1, 1, 1);//finish
}
/// get extfs type
static int test_extfs_type(char* device){
int ext2 = 1;
int ext3 = 2;
int ext4 = 3;
int device_type;
fs_open(device);
if(fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM){
log_mesg(1, 0, 0, fs_opt.debug, "%s: test feature as EXT4\n", __FILE__);
device_type = ext4;
} else if (fs->super->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL){
log_mesg(1, 0, 0, fs_opt.debug, "%s: test feature as EXT3\n", __FILE__);
device_type = ext3;
} else {
log_mesg(1, 0, 0, fs_opt.debug, "%s: test feature as EXT2\n", __FILE__);
device_type = ext2;
}
fs_close();
return device_type;
}
errcode_t quota_write_inode(quota_ctx_t qctx, unsigned int qtype_bits)
{
int retval = 0;
enum quota_type qtype;
dict_t *dict;
ext2_filsys fs;
struct quota_handle *h = NULL;
int fmt = QFMT_VFS_V1;
if (!qctx)
return 0;
fs = qctx->fs;
retval = ext2fs_get_mem(sizeof(struct quota_handle), &h);
if (retval) {
log_debug("Unable to allocate quota handle: %s",
error_message(retval));
goto out;
}
retval = ext2fs_read_bitmaps(fs);
if (retval) {
log_debug("Couldn't read bitmaps: %s", error_message(retval));
goto out;
}
for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
if (((1 << qtype) & qtype_bits) == 0)
continue;
dict = qctx->quota_dict[qtype];
if (!dict)
continue;
retval = quota_file_create(h, fs, qtype, fmt);
if (retval) {
log_debug("Cannot initialize io on quotafile: %s",
error_message(retval));
goto out;
}
write_dquots(dict, h);
retval = quota_file_close(qctx, h);
if (retval) {
log_debug("Cannot finish IO on new quotafile: %s",
strerror(errno));
if (h->qh_qf.e2_file)
ext2fs_file_close(h->qh_qf.e2_file);
(void) quota_inode_truncate(fs, h->qh_qf.ino);
goto out;
}
/* Set quota inode numbers in superblock. */
quota_set_sb_inum(fs, h->qh_qf.ino, qtype);
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
}
retval = ext2fs_write_bitmaps(fs);
if (retval) {
log_debug("Couldn't write bitmaps: %s", error_message(retval));
goto out;
}
out:
if (h)
ext2fs_free_mem(&h);
return retval;
}
errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
blk64_t *new_size, int flags EXT2FS_ATTR((unused)))
{
#ifdef __linux__
struct ext2_new_group_input input;
struct ext4_new_group_input input64;
struct ext2_super_block *sb = fs->super;
unsigned long new_desc_blocks;
ext2_filsys new_fs;
errcode_t retval;
double percent;
dgrp_t i;
blk_t size;
int fd, overhead;
int use_old_ioctl = 1;
int no_meta_bg_resize = 0;
int no_resize_ioctl = 0;
if (getenv("RESIZE2FS_KERNEL_VERSION")) {
char *version_to_emulate = getenv("RESIZE2FS_KERNEL_VERSION");
int kvers = parse_version_number(version_to_emulate);
if (kvers < VERSION_CODE(3, 7, 0))
no_meta_bg_resize = 1;
if (kvers < VERSION_CODE(3, 3, 0))
no_resize_ioctl = 1;
}
if (ext2fs_has_feature_sparse_super2(fs->super) &&
(access("/sys/fs/ext4/features/sparse_super2", R_OK) != 0)) {
com_err(program_name, 0, _("kernel does not support online "
"resize with sparse_super2"));
exit(1);
}
printf(_("Filesystem at %s is mounted on %s; "
"on-line resizing required\n"), fs->device_name, mtpt);
if (*new_size < ext2fs_blocks_count(sb)) {
com_err(program_name, 0, _("On-line shrinking not supported"));
exit(1);
}
/*
* If the number of descriptor blocks is going to increase,
* the on-line resizing inode must be present.
*/
new_desc_blocks = ext2fs_div_ceil(
ext2fs_div64_ceil(*new_size -
fs->super->s_first_data_block,
EXT2_BLOCKS_PER_GROUP(fs->super)),
EXT2_DESC_PER_BLOCK(fs->super));
printf("old_desc_blocks = %lu, new_desc_blocks = %lu\n",
fs->desc_blocks, new_desc_blocks);
/*
* Do error checking to make sure the resize will be successful.
*/
if ((access("/sys/fs/ext4/features/meta_bg_resize", R_OK) != 0) ||
no_meta_bg_resize) {
if (!ext2fs_has_feature_resize_inode(fs->super) &&
(new_desc_blocks != fs->desc_blocks)) {
com_err(program_name, 0,
_("Filesystem does not support online resizing"));
exit(1);
}
if (ext2fs_has_feature_resize_inode(fs->super) &&
new_desc_blocks > (fs->desc_blocks +
fs->super->s_reserved_gdt_blocks)) {
com_err(program_name, 0,
_("Not enough reserved gdt blocks for resizing"));
exit(1);
}
if ((ext2fs_blocks_count(sb) > MAX_32_NUM) ||
(*new_size > MAX_32_NUM)) {
com_err(program_name, 0,
_("Kernel does not support resizing a file system this large"));
exit(1);
}
}
fd = open(mtpt, O_RDONLY);
if (fd < 0) {
com_err(program_name, errno,
_("while trying to open mountpoint %s"), mtpt);
exit(1);
}
if (no_resize_ioctl) {
printf(_("Old resize interface requested.\n"));
} else if (ioctl(fd, EXT4_IOC_RESIZE_FS, new_size)) {
/*
* If kernel does not support EXT4_IOC_RESIZE_FS, use the
* old online resize. Note that the old approach does not
* handle >32 bit file systems
*
* Sigh, if we are running a 32-bit binary on a 64-bit
* kernel (which happens all the time on the MIPS
* architecture in Debian, but can happen on other CPU
* architectures as well) we will get EINVAL returned
* when an ioctl doesn't exist, at least up to Linux
* 3.1. See compat_sys_ioctl() in fs/compat_ioctl.c
* in the kernel sources. This is probably a kernel
* bug, but work around it here.
*/
if ((errno != ENOTTY) && (errno != EINVAL)) {
if (errno == EPERM)
com_err(program_name, 0,
_("Permission denied to resize filesystem"));
else
com_err(program_name, errno,
_("While checking for on-line resizing "
"support"));
exit(1);
}
} else {
close(fd);
return 0;
}
size = ext2fs_blocks_count(sb);
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
if (errno == EPERM)
com_err(program_name, 0,
_("Permission denied to resize filesystem"));
else if (errno == ENOTTY)
com_err(program_name, 0,
_("Kernel does not support online resizing"));
else
com_err(program_name, errno,
_("While checking for on-line resizing support"));
exit(1);
}
percent = (ext2fs_r_blocks_count(sb) * 100.0) /
ext2fs_blocks_count(sb);
retval = ext2fs_read_bitmaps(fs);
if (retval) {
close(fd);
return retval;
}
retval = ext2fs_dup_handle(fs, &new_fs);
if (retval) {
close(fd);
return retval;
}
/* The current method of adding one block group at a time to a
* mounted filesystem means it is impossible to accommodate the
* flex_bg allocation method of placing the metadata together
* in a single block group. For now we "fix" this issue by
* using the traditional layout for new block groups, where
* each block group is self-contained and contains its own
* bitmap blocks and inode tables. This means we don't get
* the layout advantages of flex_bg in the new block groups,
* but at least it allows on-line resizing to function.
*/
ext2fs_clear_feature_flex_bg(new_fs->super);
retval = adjust_fs_info(new_fs, fs, 0, *new_size);
if (retval) {
close(fd);
return retval;
}
printf(_("Performing an on-line resize of %s to %llu (%dk) blocks.\n"),
fs->device_name, *new_size, fs->blocksize / 1024);
size = fs->group_desc_count * sb->s_blocks_per_group +
sb->s_first_data_block;
if (size > *new_size)
size = *new_size;
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
com_err(program_name, errno,
_("While trying to extend the last group"));
exit(1);
}
for (i = fs->group_desc_count;
i < new_fs->group_desc_count; i++) {
overhead = (int) (2 + new_fs->inode_blocks_per_group);
if (ext2fs_bg_has_super(new_fs, new_fs->group_desc_count - 1))
overhead += 1 + new_fs->desc_blocks +
new_fs->super->s_reserved_gdt_blocks;
input.group = i;
input.block_bitmap = ext2fs_block_bitmap_loc(new_fs, i);
input.inode_bitmap = ext2fs_inode_bitmap_loc(new_fs, i);
input.inode_table = ext2fs_inode_table_loc(new_fs, i);
input.blocks_count = ext2fs_group_blocks_count(new_fs, i);
input.reserved_blocks = (blk_t) (percent * input.blocks_count
/ 100.0);
#if 0
printf("new block bitmap is at 0x%04x\n", input.block_bitmap);
printf("new inode bitmap is at 0x%04x\n", input.inode_bitmap);
printf("new inode table is at 0x%04x-0x%04x\n",
input.inode_table,
input.inode_table + new_fs->inode_blocks_per_group-1);
printf("new group has %u blocks\n", input.blocks_count);
printf("new group will reserve %d blocks\n",
input.reserved_blocks);
printf("new group has %d free blocks\n",
ext2fs_bg_free_blocks_count(new_fs, i),
printf("new group has %d free inodes (%d blocks)\n",
ext2fs_bg_free_inodes_count(new_fs, i),
new_fs->inode_blocks_per_group);
printf("Adding group #%d\n", input.group);
#endif
if (use_old_ioctl &&
ioctl(fd, EXT2_IOC_GROUP_ADD, &input) == 0)
continue;
else
use_old_ioctl = 0;
input64.group = input.group;
input64.block_bitmap = input.block_bitmap;
input64.inode_bitmap = input.inode_bitmap;
input64.inode_table = input.inode_table;
input64.blocks_count = input.blocks_count;
input64.reserved_blocks = input.reserved_blocks;
input64.unused = input.unused;
if (ioctl(fd, EXT4_IOC_GROUP_ADD, &input64) < 0) {
com_err(program_name, errno,
_("While trying to add group #%d"),
input.group);
exit(1);
}
}
ext2fs_free(new_fs);
close(fd);
return 0;
#else
printf(_("Filesystem at %s is mounted on %s, and on-line resizing is "
"not supported on this system.\n"), fs->device_name, mtpt);
exit(1);
#endif
}
errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
blk64_t *new_size, int flags EXT2FS_ATTR((unused)))
{
#ifdef __linux__
struct ext2_new_group_input input;
struct ext4_new_group_input input64;
struct ext2_super_block *sb = fs->super;
unsigned long new_desc_blocks;
ext2_filsys new_fs;
errcode_t retval;
double percent;
dgrp_t i;
blk64_t size;
int fd, overhead;
int use_old_ioctl = 1;
printf(_("Filesystem at %s is mounted on %s; "
"on-line resizing required\n"), fs->device_name, mtpt);
if (*new_size < ext2fs_blocks_count(sb)) {
com_err(program_name, 0, _("On-line shrinking not supported"));
exit(1);
}
/*
* If the number of descriptor blocks is going to increase,
* the on-line resizing inode must be present.
*/
new_desc_blocks = ext2fs_div_ceil(
ext2fs_div64_ceil(*new_size -
fs->super->s_first_data_block,
EXT2_BLOCKS_PER_GROUP(fs->super)),
EXT2_DESC_PER_BLOCK(fs->super));
printf("old desc_blocks = %lu, new_desc_blocks = %lu\n",
fs->desc_blocks, new_desc_blocks);
if (!(fs->super->s_feature_compat &
EXT2_FEATURE_COMPAT_RESIZE_INODE) &&
new_desc_blocks != fs->desc_blocks) {
com_err(program_name, 0,
_("Filesystem does not support online resizing"));
exit(1);
}
fd = open(mtpt, O_RDONLY);
if (fd < 0) {
com_err(program_name, errno,
_("while trying to open mountpoint %s"), mtpt);
exit(1);
}
size=ext2fs_blocks_count(sb);
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
if (errno == EPERM)
com_err(program_name, 0,
_("Permission denied to resize filesystem"));
else if (errno == ENOTTY)
com_err(program_name, 0,
_("Kernel does not support online resizing"));
else
com_err(program_name, errno,
_("While checking for on-line resizing support"));
exit(1);
}
percent = (ext2fs_r_blocks_count(sb) * 100.0) /
ext2fs_blocks_count(sb);
retval = ext2fs_read_bitmaps(fs);
if (retval)
return retval;
retval = ext2fs_dup_handle(fs, &new_fs);
if (retval)
return retval;
/* The current method of adding one block group at a time to a
* mounted filesystem means it is impossible to accomodate the
* flex_bg allocation method of placing the metadata together
* in a single block group. For now we "fix" this issue by
* using the traditional layout for new block groups, where
* each block group is self-contained and contains its own
* bitmap blocks and inode tables. This means we don't get
* the layout advantages of flex_bg in the new block groups,
* but at least it allows on-line resizing to function.
*/
new_fs->super->s_feature_incompat &= ~EXT4_FEATURE_INCOMPAT_FLEX_BG;
retval = adjust_fs_info(new_fs, fs, 0, *new_size);
if (retval)
return retval;
printf(_("Performing an on-line resize of %s to %llu (%dk) blocks.\n"),
fs->device_name, *new_size, fs->blocksize / 1024);
size = fs->group_desc_count * sb->s_blocks_per_group +
sb->s_first_data_block;
if (size > *new_size)
size = *new_size;
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
com_err(program_name, errno,
_("While trying to extend the last group"));
exit(1);
}
for (i = fs->group_desc_count;
i < new_fs->group_desc_count; i++) {
overhead = (int) (2 + new_fs->inode_blocks_per_group);
if (ext2fs_bg_has_super(new_fs, new_fs->group_desc_count - 1))
overhead += 1 + new_fs->desc_blocks +
new_fs->super->s_reserved_gdt_blocks;
input.group = i;
input.block_bitmap = ext2fs_block_bitmap_loc(new_fs, i);
input.inode_bitmap = ext2fs_inode_bitmap_loc(new_fs, i);
input.inode_table = ext2fs_inode_table_loc(new_fs, i);
input.blocks_count = sb->s_blocks_per_group;
if (i == new_fs->group_desc_count-1) {
input.blocks_count = ext2fs_blocks_count(new_fs->super) -
sb->s_first_data_block -
(i * sb->s_blocks_per_group);
}
input.reserved_blocks = (blk_t) (percent * input.blocks_count
/ 100.0);
#if 0
printf("new block bitmap is at 0x%04x\n", input.block_bitmap);
printf("new inode bitmap is at 0x%04x\n", input.inode_bitmap);
printf("new inode table is at 0x%04x-0x%04x\n",
input.inode_table,
input.inode_table + new_fs->inode_blocks_per_group-1);
printf("new group has %u blocks\n", input.blocks_count);
printf("new group will reserve %d blocks\n",
input.reserved_blocks);
printf("new group has %d free blocks\n",
ext2fs_bg_free_blocks_count(new_fs, i),
printf("new group has %d free inodes (%d blocks)\n",
ext2fs_bg_free_inodes_count(new_fs, i),
new_fs->inode_blocks_per_group);
printf("Adding group #%d\n", input.group);
#endif
if (use_old_ioctl &&
ioctl(fd, EXT2_IOC_GROUP_ADD, &input) == 0)
continue;
else
use_old_ioctl = 0;
input64.group = input.group;
input64.block_bitmap = input.block_bitmap;
input64.inode_bitmap = input.inode_bitmap;
input64.inode_table = input.inode_table;
input64.blocks_count = input.blocks_count;
input64.reserved_blocks = input.reserved_blocks;
input64.unused = input.unused;
if (ioctl(fd, EXT4_IOC_GROUP_ADD, &input64) < 0) {
com_err(program_name, errno,
_("While trying to add group #%d"),
input.group);
exit(1);
}
}
ext2fs_free(new_fs);
close(fd);
return 0;
#else
printf(_("Filesystem at %s is mounted on %s, and on-line resizing is "
"not supported on this system.\n"), fs->device_name, mtpt);
exit(1);
#endif
}
int main (int argc, char ** argv)
{
errcode_t retval;
ext2_filsys fs;
int print_badblocks = 0;
blk64_t use_superblock = 0;
int use_blocksize = 0;
int image_dump = 0;
int force = 0;
int flags;
int header_only = 0;
int c;
#ifdef ENABLE_NLS
setlocale(LC_MESSAGES, "");
setlocale(LC_CTYPE, "");
bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
textdomain(NLS_CAT_NAME);
set_com_err_gettext(gettext);
#endif
add_error_table(&et_ext2_error_table);
fprintf (stderr, "dumpe2fs %s (%s)\n", E2FSPROGS_VERSION,
E2FSPROGS_DATE);
if (argc && *argv)
program_name = *argv;
while ((c = getopt (argc, argv, "bfhixVo:")) != EOF) {
switch (c) {
case 'b':
print_badblocks++;
break;
case 'f':
force++;
break;
case 'h':
header_only++;
break;
case 'i':
image_dump++;
break;
case 'o':
parse_extended_opts(optarg, &use_superblock,
&use_blocksize);
break;
case 'V':
/* Print version number and exit */
fprintf(stderr, _("\tUsing %s\n"),
error_message(EXT2_ET_BASE));
exit(0);
case 'x':
hex_format++;
break;
default:
usage();
}
}
if (optind > argc - 1)
usage();
device_name = argv[optind++];
flags = EXT2_FLAG_JOURNAL_DEV_OK | EXT2_FLAG_SOFTSUPP_FEATURES | EXT2_FLAG_64BITS;
if (force)
flags |= EXT2_FLAG_FORCE;
if (image_dump)
flags |= EXT2_FLAG_IMAGE_FILE;
if (use_superblock && !use_blocksize) {
for (use_blocksize = EXT2_MIN_BLOCK_SIZE;
use_blocksize <= EXT2_MAX_BLOCK_SIZE;
use_blocksize *= 2) {
retval = ext2fs_open (device_name, flags,
use_superblock,
use_blocksize, unix_io_manager,
&fs);
if (!retval)
break;
}
} else
retval = ext2fs_open (device_name, flags, use_superblock,
use_blocksize, unix_io_manager, &fs);
if (retval) {
com_err (program_name, retval, _("while trying to open %s"),
device_name);
printf("%s", _("Couldn't find valid filesystem superblock.\n"));
exit (1);
}
fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
if (fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT)
blocks64 = 1;
if (print_badblocks) {
list_bad_blocks(fs, 1);
} else {
list_super (fs->super);
if (fs->super->s_feature_incompat &
EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
print_journal_information(fs);
ext2fs_close(fs);
exit(0);
}
if ((fs->super->s_feature_compat &
EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
(fs->super->s_journal_inum != 0))
print_inline_journal_information(fs);
list_bad_blocks(fs, 0);
if (header_only) {
ext2fs_close (fs);
exit (0);
}
retval = ext2fs_read_bitmaps (fs);
list_desc (fs);
if (retval) {
printf(_("\n%s: %s: error reading bitmaps: %s\n"),
program_name, device_name,
error_message(retval));
}
}
ext2fs_close (fs);
remove_error_table(&et_ext2_error_table);
exit (0);
}
ext2_inode_t *ext2Create(ext2_vd *vd, const char *path, mode_t type, const char *target)
{
ext2_inode_t *dir_ni = NULL, *ni = NULL;
char *dir = NULL;
char *targetdir = NULL;
char *name = NULL;
ext2_ino_t newentry = 0;
// Sanity check
if (!vd || !vd->fs) {
errno = ENODEV;
return NULL;
}
if(!(vd->fs->flags & EXT2_FLAG_RW)) {
errno = EACCES;
return NULL;
}
// You cannot link between devices
if(target) {
if(vd != ext2GetVolume(target)) {
errno = EXDEV;
return NULL;
}
// Check if existing
dir_ni = ext2OpenEntry(vd, target);
if (dir_ni) {
errno = EEXIST;
goto cleanup;
}
targetdir = strdup(target);
if (!targetdir) {
errno = ENOMEM;
goto cleanup;
}
target = ext2RealPath(target);
}
// Get the actual paths of the entry
path = ext2RealPath(path);
if (!path)
goto cleanup;
// Lock
ext2Lock(vd);
// Clean me
// NOTE: this looks horrible right now and need a cleanup
dir = strdup(path);
if (!dir) {
errno = ENOMEM;
goto cleanup;
}
char * tmp_path = (targetdir && (type == S_IFLNK)) ? targetdir : dir;
if (strrchr(tmp_path, '/') != NULL)
{
char * ptr = strrchr(tmp_path, '/');
name = strdup(ptr+1);
*ptr = '\0';
}
else
name = strdup(tmp_path);
// Open the entries parent directory
dir_ni = ext2OpenEntry(vd, dir);
if (!dir_ni)
goto cleanup;
// If not yet read, read the inode and block bitmap
if((!vd->fs->inode_map || !vd->fs->block_map))
ext2fs_read_bitmaps(vd->fs);
// Symbolic link
if(type == S_IFLNK)
{
if (!target) {
errno = EINVAL;
goto cleanup;
}
newentry = ext2CreateSymlink(vd, path, targetdir, name, type);
}
// Directory
else if(type == S_IFDIR)
{
newentry = ext2CreateMkDir(vd, dir_ni, LINUX_S_IFDIR | (0755 & ~vd->fs->umask), name);
}
// File
else if(type == S_IFREG)
{
newentry = ext2CreateFile(vd, dir_ni, LINUX_S_IFREG | (0755 & ~vd->fs->umask), name);
}
// If the entry was created
if (newentry != 0)
{
// Sync the entry to disc
ext2Sync(vd, NULL);
ni = ext2OpenEntry(vd, target ? target : path);
}
cleanup:
if(dir_ni)
ext2CloseEntry(vd, dir_ni);
if(name)
mem_free(name);
if(dir)
mem_free(dir);
if(targetdir)
mem_free(targetdir);
// Unlock
ext2Unlock(vd);
return ni;
}
/*
* This function creates a journal using direct I/O routines.
*/
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
blk_t num_blocks, int flags)
{
char *buf;
dgrp_t group, start, end, i, log_flex;
errcode_t retval;
struct ext2_inode inode;
unsigned long long inode_size;
struct mkjournal_struct es;
if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
&buf)))
return retval;
if ((retval = ext2fs_read_bitmaps(fs)))
goto out2;
if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
goto out2;
if (inode.i_blocks > 0) {
retval = EEXIST;
goto out2;
}
es.num_blocks = num_blocks;
es.newblocks = 0;
es.buf = buf;
es.err = 0;
es.flags = flags;
es.zero_count = 0;
if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
inode.i_flags |= EXT4_EXTENTS_FL;
if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
goto out2;
}
/*
* Set the initial goal block to be roughly at the middle of
* the filesystem. Pick a group that has the largest number
* of free blocks.
*/
group = ext2fs_group_of_blk2(fs, (ext2fs_blocks_count(fs->super) -
fs->super->s_first_data_block) / 2);
log_flex = 1 << fs->super->s_log_groups_per_flex;
if (fs->super->s_log_groups_per_flex && (group > log_flex)) {
group = group & ~(log_flex - 1);
while ((group < fs->group_desc_count) &&
ext2fs_bg_free_blocks_count(fs, group) == 0)
group++;
if (group == fs->group_desc_count)
group = 0;
start = group;
} else
start = (group > 0) ? group-1 : group;
end = ((group+1) < fs->group_desc_count) ? group+1 : group;
group = start;
for (i=start+1; i <= end; i++)
if (ext2fs_bg_free_blocks_count(fs, i) >
ext2fs_bg_free_blocks_count(fs, group))
group = i;
es.goal = ext2fs_group_first_block2(fs, group);
retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND,
0, mkjournal_proc, &es);
if (es.err) {
retval = es.err;
goto errout;
}
if (es.zero_count) {
retval = ext2fs_zero_blocks2(fs, es.blk_to_zero,
es.zero_count, 0, 0);
if (retval)
goto errout;
}
if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
goto errout;
inode_size = (unsigned long long)fs->blocksize * num_blocks;
inode.i_size = inode_size & 0xFFFFFFFF;
inode.i_size_high = (inode_size >> 32) & 0xFFFFFFFF;
if (ext2fs_needs_large_file_feature(inode_size))
fs->super->s_feature_ro_compat |=
EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
inode.i_links_count = 1;
inode.i_mode = LINUX_S_IFREG | 0600;
if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
goto errout;
retval = 0;
memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
fs->super->s_jnl_blocks[15] = inode.i_size_high;
fs->super->s_jnl_blocks[16] = inode.i_size;
fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
ext2fs_mark_super_dirty(fs);
errout:
ext2fs_zero_blocks2(0, 0, 0, 0, 0);
out2:
ext2fs_free_mem(&buf);
return retval;
}
/*
* This function creates a journal using direct I/O routines.
*/
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
blk_t num_blocks, blk64_t goal, int flags)
{
char *buf;
errcode_t retval;
struct ext2_inode inode;
unsigned long long inode_size;
int falloc_flags = EXT2_FALLOCATE_FORCE_INIT;
blk64_t zblk;
if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
&buf)))
return retval;
if ((retval = ext2fs_read_bitmaps(fs)))
goto out2;
if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
goto out2;
if (inode.i_blocks > 0) {
retval = EEXIST;
goto out2;
}
if (goal == ~0ULL)
goal = get_midpoint_journal_block(fs);
if (ext2fs_has_feature_extents(fs->super))
inode.i_flags |= EXT4_EXTENTS_FL;
if (!(flags & EXT2_MKJOURNAL_LAZYINIT))
falloc_flags |= EXT2_FALLOCATE_ZERO_BLOCKS;
inode_size = (unsigned long long)fs->blocksize * num_blocks;
inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
inode.i_links_count = 1;
inode.i_mode = LINUX_S_IFREG | 0600;
retval = ext2fs_inode_size_set(fs, &inode, inode_size);
if (retval)
goto out2;
retval = ext2fs_fallocate(fs, falloc_flags, journal_ino,
&inode, goal, 0, num_blocks);
if (retval)
goto out2;
if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
goto out2;
retval = ext2fs_bmap2(fs, journal_ino, &inode, NULL, 0, 0, NULL, &zblk);
if (retval)
goto out2;
retval = io_channel_write_blk64(fs->io, zblk, 1, buf);
if (retval)
goto out2;
memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
fs->super->s_jnl_blocks[15] = inode.i_size_high;
fs->super->s_jnl_blocks[16] = inode.i_size;
fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
ext2fs_mark_super_dirty(fs);
out2:
ext2fs_free_mem(&buf);
return retval;
}
void e2fsck_move_ext3_journal(e2fsck_t ctx)
{
struct ext2_super_block *sb = ctx->fs->super;
struct problem_context pctx;
struct ext2_inode inode;
ext2_filsys fs = ctx->fs;
ext2_ino_t ino;
errcode_t retval;
const char * const * cpp;
int group, mount_flags;
clear_problem_context(&pctx);
/*
* If the filesystem is opened read-only, or there is no
* journal, then do nothing.
*/
if ((ctx->options & E2F_OPT_READONLY) ||
(sb->s_journal_inum == 0) ||
!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL))
return;
/*
* Read in the journal inode
*/
if (ext2fs_read_inode(fs, sb->s_journal_inum, &inode) != 0)
return;
/*
* If it's necessary to backup the journal inode, do so.
*/
if ((sb->s_jnl_backup_type == 0) ||
((sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) &&
memcmp(inode.i_block, sb->s_jnl_blocks, EXT2_N_BLOCKS*4))) {
if (fix_problem(ctx, PR_0_BACKUP_JNL, &pctx)) {
memcpy(sb->s_jnl_blocks, inode.i_block,
EXT2_N_BLOCKS*4);
sb->s_jnl_blocks[16] = inode.i_size;
sb->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
ext2fs_mark_super_dirty(fs);
fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
}
}
/*
* If the journal is already the hidden inode, then do nothing
*/
if (sb->s_journal_inum == EXT2_JOURNAL_INO)
return;
/*
* The journal inode had better have only one link and not be readable.
*/
if (inode.i_links_count != 1)
return;
/*
* If the filesystem is mounted, or we can't tell whether
* or not it's mounted, do nothing.
*/
retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags);
if (retval || (mount_flags & EXT2_MF_MOUNTED))
return;
/*
* If we can't find the name of the journal inode, then do
* nothing.
*/
for (cpp = journal_names; *cpp; cpp++) {
retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp,
strlen(*cpp), 0, &ino);
if ((retval == 0) && (ino == sb->s_journal_inum))
break;
}
if (*cpp == 0)
return;
/* We need the inode bitmap to be loaded */
retval = ext2fs_read_bitmaps(fs);
if (retval)
return;
pctx.str = *cpp;
if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx))
return;
/*
* OK, we've done all the checks, let's actually move the
* journal inode. Errors at this point mean we need to force
* an ext2 filesystem check.
*/
if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0)
goto err_out;
if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0)
goto err_out;
sb->s_journal_inum = EXT2_JOURNAL_INO;
ext2fs_mark_super_dirty(fs);
fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
inode.i_links_count = 0;
inode.i_dtime = ctx->now;
if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0)
goto err_out;
group = ext2fs_group_of_ino(fs, ino);
ext2fs_unmark_inode_bitmap(fs->inode_map, ino);
ext2fs_mark_ib_dirty(fs);
fs->group_desc[group].bg_free_inodes_count++;
fs->super->s_free_inodes_count++;
return;
err_out:
pctx.errcode = retval;
fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx);
fs->super->s_state &= ~EXT2_VALID_FS;
ext2fs_mark_super_dirty(fs);
return;
}
errcode_t online_resize_fs(ext2_filsys fs, const char *mtpt,
blk_t *new_size, int flags)
{
struct ext2_new_group_input input;
struct ext2_super_block *sb = fs->super;
ext2_filsys new_fs;
errcode_t retval;
dgrp_t i;
blk_t size;
int fd, r_frac, overhead;
printf(_("Filesystem at %s is mounted on %s; "
"on-line resizing required\n"), fs->device_name, mtpt);
if (*new_size < sb->s_blocks_count) {
printf(_("On-line shrinking from %u to %u not supported.\n"),
sb->s_blocks_count, *new_size);
exit(1);
}
fd = open(mtpt, O_RDONLY);
if (fd < 0) {
com_err(program_name, errno,
_("while trying to open mountpoint %s"), mtpt);
exit(1);
}
size=sb->s_blocks_count;
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
if (errno == EPERM)
com_err(program_name, 0,
_("Permission denied to resize filesystem"));
else if (errno == ENOTTY)
com_err(program_name, 0,
_("Filesystem does not support online resizing"));
else
com_err(program_name, errno,
_("While checking for on-line resizing support"));
exit(1);
}
r_frac = ((100 * sb->s_r_blocks_count) + sb->s_blocks_count-1) /
sb->s_blocks_count;
retval = ext2fs_read_bitmaps(fs);
if (retval)
return retval;
retval = ext2fs_dup_handle(fs, &new_fs);
if (retval)
return retval;
retval = adjust_fs_info(new_fs, fs, *new_size);
if (retval)
return retval;
printf(_("Performing an on-line resize of %s to %d (%dk) blocks.\n"),
fs->device_name, *new_size, fs->blocksize / 1024);
size = fs->group_desc_count * sb->s_blocks_per_group +
sb->s_first_data_block;
if (size > *new_size)
size = *new_size;
if (ioctl(fd, EXT2_IOC_GROUP_EXTEND, &size)) {
com_err(program_name, errno,
_("While trying to extend the last group"));
exit(1);
}
for (i = fs->group_desc_count;
i < new_fs->group_desc_count; i++) {
overhead = (int) (2 + new_fs->inode_blocks_per_group);
if (ext2fs_bg_has_super(new_fs, new_fs->group_desc_count - 1))
overhead += 1 + new_fs->desc_blocks +
new_fs->super->s_reserved_gdt_blocks;
input.group = i;
input.block_bitmap = new_fs->group_desc[i].bg_block_bitmap;
input.inode_bitmap = new_fs->group_desc[i].bg_inode_bitmap;
input.inode_table = new_fs->group_desc[i].bg_inode_table;
input.blocks_count = sb->s_blocks_per_group;
if (i == new_fs->group_desc_count-1) {
input.blocks_count = new_fs->super->s_blocks_count -
sb->s_first_data_block -
(i * sb->s_blocks_per_group);
}
input.reserved_blocks = input.blocks_count * r_frac / 100;
#if 0
printf("new block bitmap is at 0x%04x\n", input.block_bitmap);
printf("new inode bitmap is at 0x%04x\n", input.inode_bitmap);
printf("new inode table is at 0x%04x-0x%04x\n",
input.inode_table,
input.inode_table + new_fs->inode_blocks_per_group-1);
printf("new group has %d blocks\n", input.blocks_count);
printf("new group will reserve %d blocks\n",
input.reserved_blocks);
printf("new group has %d free blocks\n",
new_fs->group_desc[i].bg_free_blocks_count);
printf("new group has %d free inodes (%d blocks)\n",
new_fs->group_desc[i].bg_free_inodes_count,
new_fs->inode_blocks_per_group);
printf("Adding group #%d\n", input.group);
#endif
if (ioctl(fd, EXT2_IOC_GROUP_ADD, &input) < 0) {
com_err(program_name, errno,
_("While trying to add group #%d"),
input.group);
exit(1);
}
}
ext2fs_free(new_fs);
close(fd);
return 0;
}
