summaryrefslogtreecommitdiff
path: root/lib/sqfs/data_writer/common.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/sqfs/data_writer/common.c')
-rw-r--r--lib/sqfs/data_writer/common.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/lib/sqfs/data_writer/common.c b/lib/sqfs/data_writer/common.c
new file mode 100644
index 0000000..51acc1e
--- /dev/null
+++ b/lib/sqfs/data_writer/common.c
@@ -0,0 +1,157 @@
+/* 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;
+}