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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* block_processor.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "internal.h"
static int process_block(void *userptr, void *workitem)
{
worker_data_t *worker = userptr;
sqfs_block_t *block = workitem;
sqfs_s32 ret;
if (block->size == 0)
return 0;
if (!(block->flags & SQFS_BLK_IGNORE_SPARSE) &&
is_memory_zero(block->data, block->size)) {
block->flags |= SQFS_BLK_IS_SPARSE;
return 0;
}
if (block->flags & SQFS_BLK_DONT_HASH) {
block->checksum = 0;
} else {
block->checksum = xxh32(block->data, block->size);
}
if (block->flags & (SQFS_BLK_IS_FRAGMENT | SQFS_BLK_DONT_COMPRESS))
return 0;
ret = worker->cmp->do_block(worker->cmp, block->data, block->size,
worker->scratch, worker->scratch_size);
if (ret < 0)
return ret;
if (ret > 0) {
memcpy(block->data, worker->scratch, ret);
block->size = ret;
block->flags |= SQFS_BLK_IS_COMPRESSED;
}
return 0;
}
static bool chunk_info_equals(void *user, const void *k, const void *c)
{
const chunk_info_t *key = k, *cmp = c;
(void)user;
return key->size == cmp->size && key->hash == cmp->hash;
}
static void ht_delete_function(struct hash_entry *entry)
{
free(entry->data);
}
static void block_processor_destroy(sqfs_object_t *base)
{
sqfs_block_processor_t *proc = (sqfs_block_processor_t *)base;
sqfs_block_t *it;
free(proc->frag_block);
free(proc->blk_current);
while (proc->free_list != NULL) {
it = proc->free_list;
proc->free_list = it->next;
free(it);
}
while (proc->io_queue != NULL) {
it = proc->io_queue;
proc->io_queue = it->next;
free(it);
}
if (proc->frag_ht != NULL)
hash_table_destroy(proc->frag_ht, ht_delete_function);
/* XXX: shut down the pool first before cleaning up the worker data */
if (proc->pool != NULL)
proc->pool->destroy(proc->pool);
while (proc->workers != NULL) {
worker_data_t *worker = proc->workers;
proc->workers = worker->next;
sqfs_destroy(worker->cmp);
free(worker);
}
free(proc);
}
int sqfs_block_processor_sync(sqfs_block_processor_t *proc)
{
int ret;
while (proc->backlog > 0) {
ret = dequeue_block(proc);
if (ret != 0)
return ret;
}
return 0;
}
int sqfs_block_processor_finish(sqfs_block_processor_t *proc)
{
sqfs_block_t *blk;
int status;
status = sqfs_block_processor_sync(proc);
if (status != 0)
return status;
if (proc->frag_block != NULL) {
blk = proc->frag_block;
blk->next = NULL;
proc->frag_block = NULL;
blk->io_seq_num = proc->io_seq_num++;
status = enqueue_block(proc, blk);
if (status != 0)
return status;
status = sqfs_block_processor_sync(proc);
}
return status;
}
const sqfs_block_processor_stats_t
*sqfs_block_processor_get_stats(const sqfs_block_processor_t *proc)
{
return &proc->stats;
}
int sqfs_block_processor_create_ex(const sqfs_block_processor_desc_t *desc,
sqfs_block_processor_t **out)
{
sqfs_block_processor_t *proc;
size_t i, count;
int ret;
if (desc->size != sizeof(sqfs_block_processor_desc_t))
return SQFS_ERROR_ARG_INVALID;
proc = calloc(1, sizeof(*proc));
if (proc == NULL)
return SQFS_ERROR_ALLOC;
proc->max_backlog = desc->max_backlog;
proc->max_block_size = desc->max_block_size;
proc->frag_tbl = desc->tbl;
proc->wr = desc->wr;
proc->file = desc->file;
proc->uncmp = desc->uncmp;
proc->stats.size = sizeof(proc->stats);
((sqfs_object_t *)proc)->destroy = block_processor_destroy;
/* create the thread pool */
proc->pool = thread_pool_create(desc->num_workers, process_block);
if (proc->pool == NULL) {
free(proc);
return SQFS_ERROR_INTERNAL;
}
/* create the worker compressors & scratch buffer */
count = proc->pool->get_worker_count(proc->pool);
for (i = 0; i < count; ++i) {
worker_data_t *worker = alloc_flex(sizeof(*worker), 1,
desc->max_block_size);
if (worker == NULL) {
ret = SQFS_ERROR_ALLOC;
goto fail_pool;
}
worker->scratch_size = desc->max_block_size;
worker->next = proc->workers;
proc->workers = worker;
worker->cmp = sqfs_copy(desc->cmp);
if (worker->cmp == NULL) {
ret = SQFS_ERROR_ALLOC;
goto fail_pool;
}
proc->pool->set_worker_ptr(proc->pool, i, worker);
}
/* create the fragment hash table */
proc->frag_ht = hash_table_create(NULL, chunk_info_equals);
if (proc->frag_ht == NULL) {
ret = SQFS_ERROR_ALLOC;
goto fail_pool;
}
proc->frag_ht->user = proc;
*out = proc;
return 0;
fail_pool:
block_processor_destroy((sqfs_object_t *)proc);
return ret;
}
sqfs_block_processor_t *sqfs_block_processor_create(size_t max_block_size,
sqfs_compressor_t *cmp,
unsigned int num_workers,
size_t max_backlog,
sqfs_block_writer_t *wr,
sqfs_frag_table_t *tbl)
{
sqfs_block_processor_desc_t desc;
sqfs_block_processor_t *out;
memset(&desc, 0, sizeof(desc));
desc.size = sizeof(desc);
desc.max_block_size = max_block_size;
desc.num_workers = num_workers;
desc.max_backlog = max_backlog;
desc.cmp = cmp;
desc.wr = wr;
desc.tbl = tbl;
if (sqfs_block_processor_create_ex(&desc, &out) != 0)
return NULL;
return out;
}
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