From 2ac43d981859bda063e7067371c1cf246c7f81b0 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Sat, 31 Aug 2019 16:59:50 +0200 Subject: 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 --- lib/sqfs/write_inode.c | 327 ------------------------------------------------- 1 file changed, 327 deletions(-) delete mode 100644 lib/sqfs/write_inode.c (limited to 'lib/sqfs/write_inode.c') 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 - */ -#include "config.h" - -#include "meta_writer.h" -#include "util.h" - -#include -#include -#include -#include - -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, ®, 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; -} -- cgit v1.2.3