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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* write_inode.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "highlevel.h"
#include "sqfs/inode.h"
#include "sqfs/dir.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;
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);
}
sqfs_inode_generic_t *tree_node_to_inode(fstree_t *fs, id_table_t *idtbl,
tree_node_t *node,
size_t *file_num_blocks)
{
size_t i, extra = 0, block_count = 0;
sqfs_inode_generic_t *inode;
uint16_t uid_idx, gid_idx;
uint32_t xattr = 0xFFFFFFFF;
file_info_t *fi = NULL;
if (S_ISLNK(node->mode)) {
extra = strlen(node->data.slink_target);
} else if (S_ISREG(node->mode)) {
fi = node->data.file;
block_count = fi->size / fs->block_size;
if ((fi->size % fs->block_size) != 0 &&
!(fi->flags & FILE_FLAG_HAS_FRAGMENT)) {
++block_count;
}
extra = block_count * sizeof(uint32_t);
}
inode = alloc_flex(sizeof(*inode), 1, extra);
if (inode == NULL) {
perror("creating inode from file system tree node");
return NULL;
}
if (S_ISLNK(node->mode)) {
inode->slink_target = (char *)inode->extra;
memcpy(inode->extra, node->data.slink_target, extra);
} else if (S_ISREG(node->mode)) {
inode->block_sizes = (uint32_t *)inode->extra;
for (i = 0; i < block_count; ++i) {
inode->block_sizes[i] =
node->data.file->blocks[i].size;
}
}
if (id_table_id_to_index(idtbl, node->uid, &uid_idx))
goto fail;
if (id_table_id_to_index(idtbl, node->gid, &gid_idx))
goto fail;
if (node->xattr != NULL)
xattr = node->xattr->index;
inode->base.type = get_type(node);
inode->base.mode = node->mode;
inode->base.uid_idx = uid_idx;
inode->base.gid_idx = gid_idx;
inode->base.mod_time = node->mod_time;
inode->base.inode_number = node->inode_num;
switch (inode->base.type) {
case SQFS_INODE_FIFO:
case SQFS_INODE_SOCKET:
inode->data.ipc.nlink = hard_link_count(node);
break;
case SQFS_INODE_EXT_FIFO:
case SQFS_INODE_EXT_SOCKET:
inode->data.ipc_ext.nlink = hard_link_count(node);
inode->data.ipc_ext.xattr_idx = xattr;
break;
case SQFS_INODE_SLINK:
inode->data.slink.nlink = hard_link_count(node);
inode->data.slink.target_size = extra;
break;
case SQFS_INODE_EXT_SLINK:
inode->data.slink_ext.nlink = hard_link_count(node);
inode->data.slink_ext.target_size = extra;
inode->data.slink_ext.xattr_idx = xattr;
break;
case SQFS_INODE_BDEV:
case SQFS_INODE_CDEV:
inode->data.dev.nlink = hard_link_count(node);
inode->data.dev.devno = node->data.devno;
break;
case SQFS_INODE_EXT_BDEV:
case SQFS_INODE_EXT_CDEV:
inode->data.dev_ext.nlink = hard_link_count(node);
inode->data.dev_ext.devno = node->data.devno;
inode->data.dev_ext.xattr_idx = xattr;
break;
case SQFS_INODE_FILE:
inode->data.file.blocks_start = fi->startblock;
inode->data.file.fragment_index = 0xFFFFFFFF;
inode->data.file.fragment_offset = 0xFFFFFFFF;
inode->data.file.file_size = fi->size;
if ((fi->size % fs->block_size) != 0 &&
(fi->flags & FILE_FLAG_HAS_FRAGMENT)) {
inode->data.file.fragment_index = fi->fragment;
inode->data.file.fragment_offset = fi->fragment_offset;
}
break;
case SQFS_INODE_EXT_FILE:
inode->data.file_ext.blocks_start = fi->startblock;
inode->data.file_ext.file_size = fi->size;
inode->data.file_ext.sparse = fi->sparse;
inode->data.file_ext.nlink = hard_link_count(node);
inode->data.file_ext.fragment_idx = 0xFFFFFFFF;
inode->data.file_ext.fragment_offset = 0xFFFFFFFF;
inode->data.file_ext.xattr_idx = xattr;
if ((fi->size % fs->block_size) != 0 &&
(fi->flags & FILE_FLAG_HAS_FRAGMENT)) {
inode->data.file_ext.fragment_idx = fi->fragment;
inode->data.file_ext.fragment_offset =
fi->fragment_offset;
}
break;
case SQFS_INODE_DIR:
inode->data.dir.start_block = node->data.dir->start_block;
inode->data.dir.nlink = hard_link_count(node);
inode->data.dir.size = node->data.dir->size;
inode->data.dir.offset = node->data.dir->block_offset;
inode->data.dir.parent_inode = node->parent ?
node->parent->inode_num : 1;
break;
case SQFS_INODE_EXT_DIR:
inode->data.dir_ext.nlink = hard_link_count(node);
inode->data.dir_ext.size = node->data.dir->size;
inode->data.dir_ext.start_block = node->data.dir->start_block;
inode->data.dir_ext.parent_inode = node->parent ?
node->parent->inode_num : 1;
inode->data.dir_ext.offset = node->data.dir->block_offset;
inode->data.dir_ext.xattr_idx = xattr;
break;
default:
goto fail;
}
*file_num_blocks = block_count;
return inode;
fail:
free(inode);
return NULL;
}
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