blk64_t ext2fs_find_inode_goal(ext2_filsys fs, ext2_ino_t ino,
struct ext2_inode *inode, blk64_t lblk)
{
dgrp_t group;
__u8 log_flex;
struct ext2fs_extent extent;
ext2_extent_handle_t handle = NULL;
errcode_t err;
if (inode == NULL || ext2fs_inode_data_blocks2(fs, inode) == 0)
goto no_blocks;
if (inode->i_flags & EXT4_INLINE_DATA_FL)
goto no_blocks;
if (inode->i_flags & EXT4_EXTENTS_FL) {
err = ext2fs_extent_open2(fs, ino, inode, &handle);
if (err)
goto no_blocks;
err = ext2fs_extent_goto2(handle, 0, lblk);
if (err)
goto no_blocks;
err = ext2fs_extent_get(handle, EXT2_EXTENT_CURRENT, &extent);
if (err)
goto no_blocks;
ext2fs_extent_free(handle);
return extent.e_pblk + (lblk - extent.e_lblk);
}
/* block mapped file; see if block zero is mapped? */
if (inode->i_block[0])
return inode->i_block[0];
no_blocks:
ext2fs_extent_free(handle);
log_flex = fs->super->s_log_groups_per_flex;
group = ext2fs_group_of_ino(fs, ino);
if (log_flex)
group = group & ~((1 << (log_flex)) - 1);
return ext2fs_group_first_block2(fs, group);
}
extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
ext2_extent_handle_t *ret_handle)
{
return ext2fs_extent_open2(fs, ino, NULL, ret_handle);
}
static errcode_t mk_hugefile(ext2_filsys fs, blk64_t num,
ext2_ino_t dir, unsigned long idx, ext2_ino_t *ino)
{
errcode_t retval;
blk64_t lblk, bend = 0;
__u64 size;
blk64_t left;
blk64_t count = 0;
struct ext2_inode inode;
ext2_extent_handle_t handle;
retval = ext2fs_new_inode(fs, 0, LINUX_S_IFREG, NULL, ino);
if (retval)
return retval;
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFREG | (0666 & ~fs->umask);
inode.i_links_count = 1;
inode.i_uid = uid & 0xFFFF;
ext2fs_set_i_uid_high(inode, (uid >> 16) & 0xffff);
inode.i_gid = gid & 0xFFFF;
ext2fs_set_i_gid_high(inode, (gid >> 16) & 0xffff);
retval = ext2fs_write_new_inode(fs, *ino, &inode);
if (retval)
return retval;
ext2fs_inode_alloc_stats2(fs, *ino, +1, 0);
retval = ext2fs_extent_open2(fs, *ino, &inode, &handle);
if (retval)
return retval;
/*
* We don't use ext2fs_fallocate() here because hugefiles are
* designed to be physically contiguous (if the block group
* descriptors are configured to be in a single block at the
* beginning of the file system, by using the
* packed_meta_blocks layout), with the extent tree blocks
* allocated near the beginning of the file system.
*/
lblk = 0;
left = num ? num : 1;
while (left) {
blk64_t pblk, end;
blk64_t n = left;
retval = ext2fs_find_first_zero_block_bitmap2(fs->block_map,
goal, ext2fs_blocks_count(fs->super) - 1, &end);
if (retval)
goto errout;
goal = end;
retval = ext2fs_find_first_set_block_bitmap2(fs->block_map, goal,
ext2fs_blocks_count(fs->super) - 1, &bend);
if (retval == ENOENT) {
bend = ext2fs_blocks_count(fs->super);
if (num == 0)
left = 0;
}
if (!num || bend - goal < left)
n = bend - goal;
pblk = goal;
if (num)
left -= n;
goal += n;
count += n;
ext2fs_block_alloc_stats_range(fs, pblk, n, +1);
if (zero_hugefile) {
blk64_t ret_blk;
retval = ext2fs_zero_blocks2(fs, pblk, n,
&ret_blk, NULL);
if (retval)
com_err(program_name, retval,
_("while zeroing block %llu "
"for hugefile"), ret_blk);
}
while (n) {
blk64_t l = n;
struct ext2fs_extent newextent;
if (l > EXT_INIT_MAX_LEN)
l = EXT_INIT_MAX_LEN;
newextent.e_len = l;
newextent.e_pblk = pblk;
newextent.e_lblk = lblk;
newextent.e_flags = 0;
retval = ext2fs_extent_insert(handle,
EXT2_EXTENT_INSERT_AFTER, &newextent);
if (retval)
return retval;
pblk += l;
lblk += l;
n -= l;
}
}
retval = ext2fs_read_inode(fs, *ino, &inode);
if (retval)
goto errout;
retval = ext2fs_iblk_add_blocks(fs, &inode,
count / EXT2FS_CLUSTER_RATIO(fs));
if (retval)
goto errout;
size = (__u64) count * fs->blocksize;
retval = ext2fs_inode_size_set(fs, &inode, size);
if (retval)
goto errout;
retval = ext2fs_write_new_inode(fs, *ino, &inode);
if (retval)
goto errout;
if (idx_digits)
sprintf(fn_numbuf, "%0*lu", idx_digits, idx);
else if (num_files > 1)
sprintf(fn_numbuf, "%lu", idx);
retry:
retval = ext2fs_link(fs, dir, fn_buf, *ino, EXT2_FT_REG_FILE);
if (retval == EXT2_ET_DIR_NO_SPACE) {
retval = ext2fs_expand_dir(fs, dir);
if (retval)
goto errout;
goto retry;
}
if (retval)
goto errout;
errout:
if (handle)
ext2fs_extent_free(handle);
return retval;
}
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
const char *name)
{
ext2_extent_handle_t handle;
errcode_t retval;
struct ext2_inode parent_inode, inode;
ext2_ino_t ino = inum;
ext2_ino_t scratch_ino;
blk64_t blk;
char *block = 0;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/*
* Allocate an inode, if necessary
*/
if (!ino) {
retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
0, &ino);
if (retval)
goto cleanup;
}
/*
* Allocate a data block for the directory
*/
retval = ext2fs_new_block2(fs, 0, 0, &blk);
if (retval)
goto cleanup;
/*
* Create a scratch template for the directory
*/
retval = ext2fs_new_dir_block(fs, ino, parent, &block);
if (retval)
goto cleanup;
/*
* Get the parent's inode, if necessary
*/
if (parent != ino) {
retval = ext2fs_read_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
} else
memset(&parent_inode, 0, sizeof(parent_inode));
/*
* Create the inode structure....
*/
memset(&inode, 0, sizeof(struct ext2_inode));
inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
inode.i_uid = inode.i_gid = 0;
ext2fs_iblk_set(fs, &inode, 1);
if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS)
inode.i_flags |= EXT4_EXTENTS_FL;
else
inode.i_block[0] = blk;
inode.i_links_count = 2;
inode.i_size = fs->blocksize;
/*
* Write out the inode and inode data block
*/
retval = ext2fs_write_dir_block(fs, blk, block);
if (retval)
goto cleanup;
retval = ext2fs_write_new_inode(fs, ino, &inode);
if (retval)
goto cleanup;
if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
retval = ext2fs_extent_open2(fs, ino, &inode, &handle);
if (retval)
goto cleanup;
retval = ext2fs_extent_set_bmap(handle, 0, blk, 0);
ext2fs_extent_free(handle);
if (retval)
goto cleanup;
}
/*
* Link the directory into the filesystem hierarchy
*/
if (name) {
retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
&scratch_ino);
if (!retval) {
retval = EXT2_ET_DIR_EXISTS;
name = 0;
goto cleanup;
}
if (retval != EXT2_ET_FILE_NOT_FOUND)
goto cleanup;
retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
if (retval)
goto cleanup;
}
/*
* Update parent inode's counts
*/
if (parent != ino) {
parent_inode.i_links_count++;
retval = ext2fs_write_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
}
/*
* Update accounting....
*/
ext2fs_block_alloc_stats2(fs, blk, +1);
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
cleanup:
if (block)
ext2fs_free_mem(&block);
return retval;
}