summaryrefslogtreecommitdiff
path: root/lib/sqfs/data_writer/common.c
blob: d2bf935b2cb2fcbbd8b5b0cb949459e25b3ea58c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
/* 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->blk_current);
	free(proc->frag_block);
	free(proc->frag_list);
	free(proc->fragments);
	free(proc->blocks);
	free(proc);
}

int sqfs_data_writer_write_fragment_table(sqfs_data_writer_t *proc,
					  sqfs_super_t *super)
{
	sqfs_u64 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;
}

int sqfs_data_writer_set_hooks(sqfs_data_writer_t *proc, void *user_ptr,
			       const sqfs_block_hooks_t *hooks)
{
	if (hooks->size != sizeof(*hooks))
		return SQFS_ERROR_UNSUPPORTED;

	proc->hooks = hooks;
	proc->user_ptr = user_ptr;
	return 0;
}