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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* xattr_writer.c
*
* Copyright (C) 2021 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "compat.h"
#include "util/test.h"
#include "sqfs/xattr_writer.h"
#include "sqfs/compressor.h"
#include "sqfs/xattr.h"
#include "sqfs/error.h"
#include "sqfs/super.h"
#include "sqfs/io.h"
static sqfs_u8 file_data[1024];
static size_t file_used = 0;
static int dummy_write_at(sqfs_file_t *file, sqfs_u64 offset,
const void *buffer, size_t size)
{
(void)file;
if (offset >= sizeof(file_data))
return SQFS_ERROR_OUT_OF_BOUNDS;
if (size > (sizeof(file_data) - offset))
return SQFS_ERROR_OUT_OF_BOUNDS;
if (offset > file_used)
memset(file_data + file_used, 0, offset - file_used);
if ((offset + size) > file_used)
file_used = offset + size;
memcpy(file_data + offset, buffer, size);
return 0;
}
static sqfs_u64 dummy_get_size(const sqfs_file_t *file)
{
(void)file;
return file_used;
}
static sqfs_s32 dummy_compress(sqfs_compressor_t *cmp, const sqfs_u8 *in,
sqfs_u32 size, sqfs_u8 *out, sqfs_u32 outsize)
{
(void)cmp;
memcpy(out, in, outsize < size ? outsize : size);
return 0;
}
static sqfs_file_t dummy_file = {
{ NULL, NULL },
NULL,
dummy_write_at,
dummy_get_size,
NULL,
};
static sqfs_compressor_t dummy_compressor = {
{ NULL, NULL },
NULL,
NULL,
NULL,
dummy_compress,
};
/*****************************************************************************/
int main(int argc, char **argv)
{
size_t offset, ool_value_offset, id_offset;
sqfs_xattr_id_table_t idtbl;
sqfs_xattr_writer_t *xwr;
sqfs_xattr_value_t value;
sqfs_xattr_entry_t key;
sqfs_xattr_id_t desc;
sqfs_super_t super;
char strbuf[32];
sqfs_u16 hdr;
sqfs_u64 ref;
sqfs_u32 id;
int ret;
(void)argc; (void)argv;
/* setup */
xwr = sqfs_xattr_writer_create(0);
TEST_NOT_NULL(xwr);
/* record a block of key/value pairs */
ret = sqfs_xattr_writer_begin(xwr, 0);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "user.foobar", "test", 4);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "security.selinux", "Xwhatever", 9);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_end(xwr, &id);
TEST_EQUAL_I(ret, 0);
TEST_EQUAL_UI(id, 0);
/* record a second, different block */
ret = sqfs_xattr_writer_begin(xwr, 0);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "user.foobar", "bla", 3);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "security.selinux", "blub", 4);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_end(xwr, &id);
TEST_EQUAL_I(ret, 0);
TEST_EQUAL_UI(id, 1);
/* same as first block after sorting and gets the same ID */
ret = sqfs_xattr_writer_begin(xwr, 0);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "security.selinux", "Xwhatever", 9);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "user.foobar", "test", 4);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_end(xwr, &id);
TEST_EQUAL_I(ret, 0);
TEST_EQUAL_UI(id, 0);
/* the third assignment overwrites the first, making
the block identical to the second one */
ret = sqfs_xattr_writer_begin(xwr, 0);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "user.foobar", "mimimi", 6);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "security.selinux", "blub", 4);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "user.foobar", "bla", 3);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_end(xwr, &id);
TEST_EQUAL_I(ret, 0);
TEST_EQUAL_UI(id, 1);
/* add another block with the same value, so it gets stored OOL */
ret = sqfs_xattr_writer_begin(xwr, 0);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_add(xwr, "security.selinux", "Xwhatever", 9);
TEST_EQUAL_I(ret, 0);
ret = sqfs_xattr_writer_end(xwr, &id);
TEST_EQUAL_I(ret, 0);
TEST_EQUAL_UI(id, 2);
/* serialize */
sqfs_super_init(&super, 131072, 0, SQFS_COMP_GZIP);
ret = sqfs_xattr_writer_flush(xwr, &dummy_file, &super,
&dummy_compressor);
TEST_EQUAL_I(ret, 0);
TEST_EQUAL_UI(file_used, 177);
/* meta data block holding the key-value-pairs */
memcpy(&hdr, file_data, sizeof(hdr));
hdr = le16toh(hdr);
TEST_EQUAL_UI(hdr, (0x8000 | 101));
offset = 2;
memcpy(&key, file_data + offset, sizeof(key));
key.type = le16toh(key.type);
key.size = le16toh(key.size);
offset += sizeof(key);
TEST_EQUAL_UI(key.type, SQFS_XATTR_USER);
TEST_EQUAL_UI(key.size, 6);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, key.size);
TEST_STR_EQUAL(strbuf, "foobar");
offset += key.size;
memcpy(&value, file_data + offset, sizeof(value));
value.size = le32toh(value.size);
offset += sizeof(value);
TEST_EQUAL_UI(value.size, 4);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, value.size);
TEST_STR_EQUAL(strbuf, "test");
offset += value.size;
memcpy(&key, file_data + offset, sizeof(key));
key.type = le16toh(key.type);
key.size = le16toh(key.size);
offset += sizeof(key);
TEST_EQUAL_UI(key.type, SQFS_XATTR_SECURITY);
TEST_EQUAL_UI(key.size, 7);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, key.size);
TEST_STR_EQUAL(strbuf, "selinux");
offset += key.size;
ool_value_offset = offset;
memcpy(&value, file_data + offset, sizeof(value));
value.size = le32toh(value.size);
offset += sizeof(value);
TEST_EQUAL_UI(value.size, 9);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, value.size);
TEST_STR_EQUAL(strbuf, "Xwhatever");
offset += value.size;
memcpy(&key, file_data + offset, sizeof(key));
key.type = le16toh(key.type);
key.size = le16toh(key.size);
offset += sizeof(key);
TEST_EQUAL_UI(key.type, SQFS_XATTR_USER);
TEST_EQUAL_UI(key.size, 6);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, key.size);
TEST_STR_EQUAL(strbuf, "foobar");
offset += key.size;
memcpy(&value, file_data + offset, sizeof(value));
value.size = le32toh(value.size);
offset += sizeof(value);
TEST_EQUAL_UI(value.size, 3);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, value.size);
TEST_STR_EQUAL(strbuf, "bla");
offset += value.size;
memcpy(&key, file_data + offset, sizeof(key));
key.type = le16toh(key.type);
key.size = le16toh(key.size);
offset += sizeof(key);
TEST_EQUAL_UI(key.type, SQFS_XATTR_SECURITY);
TEST_EQUAL_UI(key.size, 7);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, key.size);
TEST_STR_EQUAL(strbuf, "selinux");
offset += key.size;
memcpy(&value, file_data + offset, sizeof(value));
value.size = le32toh(value.size);
offset += sizeof(value);
TEST_EQUAL_UI(value.size, 4);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, value.size);
TEST_STR_EQUAL(strbuf, "blub");
offset += value.size;
memcpy(&key, file_data + offset, sizeof(key));
key.type = le16toh(key.type);
key.size = le16toh(key.size);
offset += sizeof(key);
TEST_EQUAL_UI(key.type, (SQFS_XATTR_SECURITY | SQFS_XATTR_FLAG_OOL));
TEST_EQUAL_UI(key.size, 7);
memset(strbuf, '\0', sizeof(strbuf));
memcpy(strbuf, file_data + offset, key.size);
TEST_STR_EQUAL(strbuf, "selinux");
offset += key.size;
memcpy(&value, file_data + offset, sizeof(value));
value.size = le32toh(value.size);
offset += sizeof(value);
TEST_EQUAL_UI(value.size, 8);
memcpy(&ref, file_data + offset, sizeof(ref));
ref = le64toh(ref);
TEST_EQUAL_UI(ref, (ool_value_offset - 2));
offset += value.size;
/* meta data block holding the ID descriptions */
id_offset = offset;
memcpy(&hdr, file_data + offset, sizeof(hdr));
TEST_EQUAL_UI(le16toh(hdr), (0x8000 | (16 * 3)));
offset += sizeof(hdr);
memcpy(&desc, file_data + offset, sizeof(desc));
TEST_EQUAL_UI(le64toh(desc.xattr), 0);
TEST_EQUAL_UI(le32toh(desc.count), 2);
TEST_EQUAL_UI(le32toh(desc.size), 42);
offset += sizeof(desc);
memcpy(&desc, file_data + offset, sizeof(desc));
TEST_EQUAL_UI(le64toh(desc.xattr), 42);
TEST_EQUAL_UI(le32toh(desc.count), 2);
TEST_EQUAL_UI(le32toh(desc.size), 36);
offset += sizeof(desc);
memcpy(&desc, file_data + offset, sizeof(desc));
TEST_EQUAL_UI(le64toh(desc.xattr), 78);
TEST_EQUAL_UI(le32toh(desc.count), 1);
TEST_EQUAL_UI(le32toh(desc.size), 23);
offset += sizeof(desc);
/* the xattr table itself */
TEST_EQUAL_UI(super.xattr_id_table_start, offset);
memcpy(&idtbl, file_data + offset, sizeof(idtbl));
TEST_EQUAL_UI(le64toh(idtbl.xattr_table_start), 0);
TEST_EQUAL_UI(le32toh(idtbl.xattr_ids), 3);
offset += sizeof(idtbl);
memcpy(&ref, file_data + offset, sizeof(ref));
TEST_EQUAL_UI(le64toh(ref), id_offset);
offset += sizeof(ref);
TEST_EQUAL_UI(offset, file_used);
/* cleanup */
sqfs_destroy(xwr);
return EXIT_SUCCESS;
}
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