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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* common.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "internal.h"
void free_blk_list(sqfs_block_t *list)
{
sqfs_block_t *it;
while (list != NULL) {
it = list;
list = list->next;
free(it);
}
}
int data_writer_init(sqfs_data_writer_t *proc, size_t max_block_size,
sqfs_compressor_t *cmp, unsigned int num_workers,
size_t max_backlog, size_t devblksz, sqfs_file_t *file)
{
proc->max_block_size = max_block_size;
proc->num_workers = num_workers;
proc->max_backlog = max_backlog;
proc->devblksz = devblksz;
proc->cmp = cmp;
proc->file = file;
proc->max_blocks = INIT_BLOCK_COUNT;
proc->frag_list_max = INIT_BLOCK_COUNT;
proc->blocks = alloc_array(sizeof(proc->blocks[0]), proc->max_blocks);
if (proc->blocks == NULL)
return -1;
proc->frag_list = alloc_array(sizeof(proc->frag_list[0]),
proc->frag_list_max);
if (proc->frag_list == NULL)
return -1;
return 0;
}
void data_writer_cleanup(sqfs_data_writer_t *proc)
{
free_blk_list(proc->queue);
free_blk_list(proc->done);
free(proc->frag_block);
free(proc->frag_list);
free(proc->fragments);
free(proc->blocks);
free(proc);
}
void data_writer_store_done(sqfs_data_writer_t *proc, sqfs_block_t *blk,
int status)
{
sqfs_block_t *it = proc->done, *prev = NULL;
while (it != NULL) {
if (it->sequence_number >= blk->sequence_number)
break;
prev = it;
it = it->next;
}
if (prev == NULL) {
blk->next = proc->done;
proc->done = blk;
} else {
blk->next = prev->next;
prev->next = blk;
}
if (status != 0 && proc->status == 0)
proc->status = status;
proc->backlog -= 1;
}
sqfs_block_t *data_writer_next_work_item(sqfs_data_writer_t *proc)
{
sqfs_block_t *blk;
if (proc->status != 0)
return NULL;
blk = proc->queue;
proc->queue = blk->next;
blk->next = NULL;
if (proc->queue == NULL)
proc->queue_last = NULL;
return blk;
}
int data_writer_do_block(sqfs_block_t *block, sqfs_compressor_t *cmp,
uint8_t *scratch, size_t scratch_size)
{
ssize_t ret;
if (block->size == 0) {
block->checksum = 0;
return 0;
}
block->checksum = crc32(0, block->data, block->size);
if (block->flags & SQFS_BLK_IS_FRAGMENT)
return 0;
if (!(block->flags & SQFS_BLK_DONT_COMPRESS)) {
ret = cmp->do_block(cmp, block->data, block->size,
scratch, scratch_size);
if (ret < 0)
return ret;
if (ret > 0) {
memcpy(block->data, scratch, ret);
block->size = ret;
block->flags |= SQFS_BLK_IS_COMPRESSED;
}
}
return 0;
}
int sqfs_data_writer_write_fragment_table(sqfs_data_writer_t *proc,
sqfs_super_t *super)
{
uint64_t start;
size_t size;
int ret;
if (proc->num_fragments == 0) {
super->fragment_entry_count = 0;
super->fragment_table_start = 0xFFFFFFFFFFFFFFFFUL;
super->flags &= ~SQFS_FLAG_ALWAYS_FRAGMENTS;
super->flags |= SQFS_FLAG_NO_FRAGMENTS;
return 0;
}
size = sizeof(proc->fragments[0]) * proc->num_fragments;
ret = sqfs_write_table(proc->file, proc->cmp,
proc->fragments, size, &start);
if (ret)
return ret;
super->flags &= ~SQFS_FLAG_NO_FRAGMENTS;
super->flags |= SQFS_FLAG_ALWAYS_FRAGMENTS;
super->fragment_entry_count = proc->num_fragments;
super->fragment_table_start = start;
return 0;
}
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