Split libsquashfs.a into low seperate libraries

The idea is to make libsquashfs.a independend of libfstree.a, so it becomes
a general purpose squashfs manipulation library. All the high level glue code
for libfstree.a and utilites that are overly specific with to tools are moved
to a seperate librarby.

This commit makes the first step by moving the stuff with dependencies on
libfstree to a seperate library.

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

1 files changed, 0 insertions, 327 deletions

diff --git a/lib/sqfs/write_inode.c b/lib/sqfs/write_inode.c
deleted file mode 100644
index 1295fa9..0000000
--- a/lib/sqfs/write_inode.c
+++ /dev/null
@@ -1,327 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * write_inode.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "config.h"
-
-#include "meta_writer.h"
-#include "util.h"
-
-#include <assert.h>
-#include <endian.h>
-#include <stdlib.h>
-#include <string.h>
-
-static size_t hard_link_count(tree_node_t *n)
-{
-	size_t count;
-
-	if (S_ISDIR(n->mode)) {
-		count = 2;
-
-		for (n = n->data.dir->children; n != NULL; n = n->next)
-			++count;
-
-		return count;
-	}
-
-	return 1;
-}
-
-static int get_type(tree_node_t *node)
-{
-	switch (node->mode & S_IFMT) {
-	case S_IFSOCK:
-		if (node->xattr != NULL)
-			return SQFS_INODE_EXT_SOCKET;
-		return SQFS_INODE_SOCKET;
-	case S_IFIFO:
-		if (node->xattr != NULL)
-			return SQFS_INODE_EXT_FIFO;
-		return SQFS_INODE_FIFO;
-	case S_IFLNK:
-		if (node->xattr != NULL)
-			return SQFS_INODE_EXT_SLINK;
-		return SQFS_INODE_SLINK;
-	case S_IFBLK:
-		if (node->xattr != NULL)
-			return SQFS_INODE_EXT_BDEV;
-		return SQFS_INODE_BDEV;
-	case S_IFCHR:
-		if (node->xattr != NULL)
-			return SQFS_INODE_EXT_CDEV;
-		return SQFS_INODE_CDEV;
-	case S_IFREG: {
-		file_info_t *fi = node->data.file;
-
-		if (node->xattr != NULL || fi->sparse > 0)
-			return SQFS_INODE_EXT_FILE;
-
-		if (fi->startblock > 0xFFFFFFFFUL || fi->size > 0xFFFFFFFFUL)
-			return SQFS_INODE_EXT_FILE;
-
-		if (hard_link_count(node) > 1)
-			return SQFS_INODE_EXT_FILE;
-
-		return SQFS_INODE_FILE;
-	}
-	case S_IFDIR: {
-		dir_info_t *di = node->data.dir;
-
-		if (node->xattr != NULL)
-			return SQFS_INODE_EXT_DIR;
-
-		if (di->start_block > 0xFFFFFFFFUL || di->size > 0xFFFF)
-			return SQFS_INODE_EXT_DIR;
-
-		return SQFS_INODE_DIR;
-	}
-	}
-	assert(0);
-}
-
-static int write_file_blocks(fstree_t *fs, file_info_t *fi, meta_writer_t *im)
-{
-	uint64_t i, count = fi->size / fs->block_size;
-	uint32_t bs;
-
-	if ((fi->size % fs->block_size) != 0 &&
-	    !(fi->flags & FILE_FLAG_HAS_FRAGMENT)) {
-		++count;
-	}
-
-	for (i = 0; i < count; ++i) {
-		bs = htole32(fi->blocks[i].size);
-
-		if (meta_writer_append(im, &bs, sizeof(bs)))
-			return -1;
-	}
-	return 0;
-}
-
-static int write_dir_index(dir_index_t *diridx, meta_writer_t *im)
-{
-	sqfs_dir_index_t idx;
-	size_t i;
-
-	for (i = 0; i < diridx->num_nodes; ++i) {
-		idx.start_block = htole32(diridx->idx_nodes[i].block);
-		idx.index = htole32(diridx->idx_nodes[i].index);
-		idx.size = strlen(diridx->idx_nodes[i].node->name) - 1;
-		idx.size = htole32(idx.size);
-
-		if (meta_writer_append(im, &idx, sizeof(idx)))
-			return -1;
-
-		if (meta_writer_append(im, diridx->idx_nodes[i].node->name,
-				       le32toh(idx.size) + 1)) {
-			return -1;
-		}
-	}
-	return 0;
-}
-
-int meta_writer_write_inode(fstree_t *fs, id_table_t *idtbl, meta_writer_t *im,
-			    meta_writer_t *dm, tree_node_t *node)
-{
-	dir_index_t *diridx = NULL;
-	uint16_t uid_idx, gid_idx;
-	sqfs_inode_t base;
-	uint32_t offset;
-	uint64_t block;
-
-	if (id_table_id_to_index(idtbl, node->uid, &uid_idx))
-		return -1;
-
-	if (id_table_id_to_index(idtbl, node->gid, &gid_idx))
-		return -1;
-
-	meta_writer_get_position(im, &block, &offset);
-	node->inode_ref = (block << 16) | offset;
-
-	if (S_ISDIR(node->mode)) {
-		if (meta_writer_write_dir(dm, node->data.dir, &diridx))
-			return -1;
-	}
-
-	base.type = htole16(get_type(node));
-	base.mode = htole16(node->mode);
-	base.uid_idx = htole16(uid_idx);
-	base.gid_idx = htole16(gid_idx);
-	base.mod_time = htole32(node->mod_time);
-	base.inode_number = htole32(node->inode_num);
-
-	if (meta_writer_append(im, &base, sizeof(base))) {
-		free(diridx);
-		return -1;
-	}
-
-	switch (le16toh(base.type)) {
-	case SQFS_INODE_FIFO:
-	case SQFS_INODE_SOCKET: {
-		sqfs_inode_ipc_t ipc = {
-			.nlink = htole32(hard_link_count(node)),
-		};
-
-		return meta_writer_append(im, &ipc, sizeof(ipc));
-	}
-	case SQFS_INODE_EXT_FIFO:
-	case SQFS_INODE_EXT_SOCKET: {
-		sqfs_inode_ipc_ext_t ipc = {
-			.nlink = htole32(hard_link_count(node)),
-			.xattr_idx = htole32(0xFFFFFFFF),
-		};
-
-		if (node->xattr != NULL)
-			ipc.xattr_idx = htole32(node->xattr->index);
-
-		return meta_writer_append(im, &ipc, sizeof(ipc));
-	}
-	case SQFS_INODE_SLINK: {
-		sqfs_inode_slink_t slink = {
-			.nlink = htole32(hard_link_count(node)),
-			.target_size = htole32(strlen(node->data.slink_target)),
-		};
-
-		if (meta_writer_append(im, &slink, sizeof(slink)))
-			return -1;
-		if (meta_writer_append(im, node->data.slink_target,
-				       le32toh(slink.target_size))) {
-			return -1;
-		}
-		break;
-	}
-	case SQFS_INODE_EXT_SLINK: {
-		sqfs_inode_slink_t slink = {
-			.nlink = htole32(hard_link_count(node)),
-			.target_size = htole32(strlen(node->data.slink_target)),
-		};
-		uint32_t xattr = htole32(0xFFFFFFFF);
-
-		if (node->xattr != NULL)
-			xattr = htole32(node->xattr->index);
-
-		if (meta_writer_append(im, &slink, sizeof(slink)))
-			return -1;
-		if (meta_writer_append(im, node->data.slink_target,
-				       le32toh(slink.target_size))) {
-			return -1;
-		}
-		if (meta_writer_append(im, &xattr, sizeof(xattr)))
-			return -1;
-		break;
-	}
-	case SQFS_INODE_BDEV:
-	case SQFS_INODE_CDEV: {
-		sqfs_inode_dev_t dev = {
-			.nlink = htole32(hard_link_count(node)),
-			.devno = htole32(node->data.devno),
-		};
-
-		return meta_writer_append(im, &dev, sizeof(dev));
-	}
-	case SQFS_INODE_EXT_BDEV:
-	case SQFS_INODE_EXT_CDEV: {
-		sqfs_inode_dev_ext_t dev = {
-			.nlink = htole32(hard_link_count(node)),
-			.devno = htole32(node->data.devno),
-			.xattr_idx = htole32(0xFFFFFFFF),
-		};
-
-		if (node->xattr != NULL)
-			dev.xattr_idx = htole32(node->xattr->index);
-
-		return meta_writer_append(im, &dev, sizeof(dev));
-	}
-	case SQFS_INODE_EXT_FILE: {
-		file_info_t *fi = node->data.file;
-		sqfs_inode_file_ext_t ext = {
-			.blocks_start = htole64(fi->startblock),
-			.file_size = htole64(fi->size),
-			.sparse = htole64(fi->sparse),
-			.nlink = htole32(hard_link_count(node)),
-			.fragment_idx = htole32(0xFFFFFFFF),
-			.fragment_offset = htole32(0xFFFFFFFF),
-			.xattr_idx = htole32(0xFFFFFFFF),
-		};
-
-		if ((fi->size % fs->block_size) != 0) {
-			ext.fragment_idx = htole32(fi->fragment);
-			ext.fragment_offset = htole32(fi->fragment_offset);
-		}
-
-		if (node->xattr != NULL)
-			ext.xattr_idx = htole32(node->xattr->index);
-
-		if (meta_writer_append(im, &ext, sizeof(ext)))
-			return -1;
-		return write_file_blocks(fs, fi, im);
-	}
-	case SQFS_INODE_FILE: {
-		file_info_t *fi = node->data.file;
-		sqfs_inode_file_t reg = {
-			.blocks_start = htole32(fi->startblock),
-			.fragment_index = htole32(0xFFFFFFFF),
-			.fragment_offset = htole32(0xFFFFFFFF),
-			.file_size = htole32(fi->size),
-		};
-
-		if ((fi->size % fs->block_size) != 0) {
-			reg.fragment_index = htole32(fi->fragment);
-			reg.fragment_offset = htole32(fi->fragment_offset);
-		}
-
-		if (meta_writer_append(im, &reg, sizeof(reg)))
-			return -1;
-		return write_file_blocks(fs, fi, im);
-	}
-	case SQFS_INODE_DIR: {
-		sqfs_inode_dir_t dir = {
-			.start_block = htole32(node->data.dir->start_block),
-			.nlink = htole32(hard_link_count(node)),
-			.size = htole16(node->data.dir->size),
-			.offset = htole16(node->data.dir->block_offset),
-			.parent_inode = node->parent ?
-				htole32(node->parent->inode_num) : htole32(1),
-		};
-
-		return meta_writer_append(im, &dir, sizeof(dir));
-	}
-	case SQFS_INODE_EXT_DIR: {
-		sqfs_inode_dir_ext_t ext = {
-			.nlink = htole32(hard_link_count(node)),
-			.size = htole32(node->data.dir->size),
-			.start_block = htole32(node->data.dir->start_block),
-			.parent_inode = node->parent ?
-				htole32(node->parent->inode_num) : htole32(1),
-			.inodex_count = htole32(0),
-			.offset = htole16(node->data.dir->block_offset),
-			.xattr_idx = htole32(0xFFFFFFFF),
-		};
-
-		if (node->xattr != NULL)
-			ext.xattr_idx = htole32(node->xattr->index);
-
-		if (diridx != NULL)
-			ext.inodex_count = htole32(diridx->num_nodes - 1);
-
-		if (meta_writer_append(im, &ext, sizeof(ext))) {
-			free(diridx);
-			return -1;
-		}
-
-		if (diridx != NULL && write_dir_index(diridx, im) != 0) {
-			free(diridx);
-			return -1;
-		}
-
-		free(diridx);
-		break;
-	}
-	default:
-		assert(0);
-	}
-	return 0;
-}