unsigned int len, i, shift;
int ret;
QCowHeader header;
+ Error *local_err = NULL;
+
+ bs->file = bdrv_open_child(NULL, options, "file", bs, &child_file,
+ false, errp);
+ if (!bs->file) {
+ return -EINVAL;
+ }
- ret = bdrv_pread(bs->file->bs, 0, &header, sizeof(header));
+ ret = bdrv_pread(bs->file, 0, &header, sizeof(header));
if (ret < 0) {
goto fail;
}
ret = -EINVAL;
goto fail;
}
- if (!qcrypto_cipher_supports(QCRYPTO_CIPHER_ALG_AES_128)) {
+ if (!qcrypto_cipher_supports(QCRYPTO_CIPHER_ALG_AES_128,
+ QCRYPTO_CIPHER_MODE_CBC)) {
error_setg(errp, "AES cipher not available");
ret = -EINVAL;
goto fail;
if (s->crypt_method_header) {
if (bdrv_uses_whitelist() &&
s->crypt_method_header == QCOW_CRYPT_AES) {
- error_report("qcow built-in AES encryption is deprecated");
- error_printf("Support for it will be removed in a future release.\n"
- "You can use 'qemu-img convert' to switch to an\n"
- "unencrypted qcow image, or a LUKS raw image.\n");
+ error_setg(errp,
+ "Use of AES-CBC encrypted qcow images is no longer "
+ "supported in system emulators");
+ error_append_hint(errp,
+ "You can use 'qemu-img convert' to convert your "
+ "image to an alternative supported format, such "
+ "as unencrypted qcow, or raw with the LUKS "
+ "format instead.\n");
+ ret = -ENOSYS;
+ goto fail;
}
- bs->encrypted = 1;
+ bs->encrypted = true;
}
s->cluster_bits = header.cluster_bits;
s->cluster_size = 1 << s->cluster_bits;
goto fail;
}
- ret = bdrv_pread(bs->file->bs, s->l1_table_offset, s->l1_table,
+ ret = bdrv_pread(bs->file, s->l1_table_offset, s->l1_table,
s->l1_size * sizeof(uint64_t));
if (ret < 0) {
goto fail;
ret = -EINVAL;
goto fail;
}
- ret = bdrv_pread(bs->file->bs, header.backing_file_offset,
+ ret = bdrv_pread(bs->file, header.backing_file_offset,
bs->backing_file, len);
if (ret < 0) {
goto fail;
error_setg(&s->migration_blocker, "The qcow format used by node '%s' "
"does not support live migration",
bdrv_get_device_or_node_name(bs));
- migrate_add_blocker(s->migration_blocker);
+ ret = migrate_add_blocker(s->migration_blocker, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ error_free(s->migration_blocker);
+ goto fail;
+ }
qemu_co_mutex_init(&s->lock);
return 0;
/* update the L1 entry */
s->l1_table[l1_index] = l2_offset;
tmp = cpu_to_be64(l2_offset);
- if (bdrv_pwrite_sync(bs->file->bs,
+ if (bdrv_pwrite_sync(bs->file,
s->l1_table_offset + l1_index * sizeof(tmp),
&tmp, sizeof(tmp)) < 0)
return 0;
l2_table = s->l2_cache + (min_index << s->l2_bits);
if (new_l2_table) {
memset(l2_table, 0, s->l2_size * sizeof(uint64_t));
- if (bdrv_pwrite_sync(bs->file->bs, l2_offset, l2_table,
+ if (bdrv_pwrite_sync(bs->file, l2_offset, l2_table,
s->l2_size * sizeof(uint64_t)) < 0)
return 0;
} else {
- if (bdrv_pread(bs->file->bs, l2_offset, l2_table,
+ if (bdrv_pread(bs->file, l2_offset, l2_table,
s->l2_size * sizeof(uint64_t)) !=
s->l2_size * sizeof(uint64_t))
return 0;
cluster_offset = (cluster_offset + s->cluster_size - 1) &
~(s->cluster_size - 1);
/* write the cluster content */
- if (bdrv_pwrite(bs->file->bs, cluster_offset, s->cluster_cache,
+ if (bdrv_pwrite(bs->file, cluster_offset, s->cluster_cache,
s->cluster_size) !=
s->cluster_size)
return -1;
/* round to cluster size */
cluster_offset = (cluster_offset + s->cluster_size - 1) &
~(s->cluster_size - 1);
- bdrv_truncate(bs->file->bs, cluster_offset + s->cluster_size);
+ bdrv_truncate(bs->file, cluster_offset + s->cluster_size);
/* if encrypted, we must initialize the cluster
content which won't be written */
if (bs->encrypted &&
errno = EIO;
return -1;
}
- if (bdrv_pwrite(bs->file->bs,
+ if (bdrv_pwrite(bs->file,
cluster_offset + i * 512,
s->cluster_data, 512) != 512)
return -1;
/* update L2 table */
tmp = cpu_to_be64(cluster_offset);
l2_table[l2_index] = tmp;
- if (bdrv_pwrite_sync(bs->file->bs, l2_offset + l2_index * sizeof(tmp),
+ if (bdrv_pwrite_sync(bs->file, l2_offset + l2_index * sizeof(tmp),
&tmp, sizeof(tmp)) < 0)
return 0;
}
if (s->cluster_cache_offset != coffset) {
csize = cluster_offset >> (63 - s->cluster_bits);
csize &= (s->cluster_size - 1);
- ret = bdrv_pread(bs->file->bs, coffset, s->cluster_data, csize);
+ ret = bdrv_pread(bs->file, coffset, s->cluster_data, csize);
if (ret != csize)
return -1;
if (decompress_buffer(s->cluster_cache, s->cluster_size,
hd_iov.iov_len = n * 512;
qemu_iovec_init_external(&hd_qiov, &hd_iov, 1);
qemu_co_mutex_unlock(&s->lock);
- ret = bdrv_co_readv(bs->backing->bs, sector_num,
- n, &hd_qiov);
+ ret = bdrv_co_readv(bs->backing, sector_num, n, &hd_qiov);
qemu_co_mutex_lock(&s->lock);
if (ret < 0) {
goto fail;
hd_iov.iov_len = n * 512;
qemu_iovec_init_external(&hd_qiov, &hd_iov, 1);
qemu_co_mutex_unlock(&s->lock);
- ret = bdrv_co_readv(bs->file->bs,
+ ret = bdrv_co_readv(bs->file,
(cluster_offset >> 9) + index_in_cluster,
n, &hd_qiov);
qemu_co_mutex_lock(&s->lock);
hd_iov.iov_len = n * 512;
qemu_iovec_init_external(&hd_qiov, &hd_iov, 1);
qemu_co_mutex_unlock(&s->lock);
- ret = bdrv_co_writev(bs->file->bs,
+ ret = bdrv_co_writev(bs->file,
(cluster_offset >> 9) + index_in_cluster,
n, &hd_qiov);
qemu_co_mutex_lock(&s->lock);
}
qcow_blk = blk_new_open(filename, NULL, NULL,
- BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err);
+ BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL,
+ &local_err);
if (qcow_blk == NULL) {
error_propagate(errp, local_err);
ret = -EIO;
}
tmp = g_malloc0(BDRV_SECTOR_SIZE);
- for (i = 0; i < ((sizeof(uint64_t)*l1_size + BDRV_SECTOR_SIZE - 1)/
- BDRV_SECTOR_SIZE); i++) {
+ for (i = 0; i < DIV_ROUND_UP(sizeof(uint64_t) * l1_size, BDRV_SECTOR_SIZE);
+ i++) {
ret = blk_pwrite(qcow_blk, header_size + BDRV_SECTOR_SIZE * i,
tmp, BDRV_SECTOR_SIZE, 0);
if (ret != BDRV_SECTOR_SIZE) {
int ret;
memset(s->l1_table, 0, l1_length);
- if (bdrv_pwrite_sync(bs->file->bs, s->l1_table_offset, s->l1_table,
+ if (bdrv_pwrite_sync(bs->file, s->l1_table_offset, s->l1_table,
l1_length) < 0)
return -1;
- ret = bdrv_truncate(bs->file->bs, s->l1_table_offset + l1_length);
+ ret = bdrv_truncate(bs->file, s->l1_table_offset + l1_length);
if (ret < 0)
return ret;
/* XXX: put compressed sectors first, then all the cluster aligned
tables to avoid losing bytes in alignment */
-static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num,
- const uint8_t *buf, int nb_sectors)
+static coroutine_fn int
+qcow_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset,
+ uint64_t bytes, QEMUIOVector *qiov)
{
BDRVQcowState *s = bs->opaque;
+ QEMUIOVector hd_qiov;
+ struct iovec iov;
z_stream strm;
int ret, out_len;
- uint8_t *out_buf;
+ uint8_t *buf, *out_buf;
uint64_t cluster_offset;
- if (nb_sectors != s->cluster_sectors) {
- ret = -EINVAL;
-
- /* Zero-pad last write if image size is not cluster aligned */
- if (sector_num + nb_sectors == bs->total_sectors &&
- nb_sectors < s->cluster_sectors) {
- uint8_t *pad_buf = qemu_blockalign(bs, s->cluster_size);
- memset(pad_buf, 0, s->cluster_size);
- memcpy(pad_buf, buf, nb_sectors * BDRV_SECTOR_SIZE);
- ret = qcow_write_compressed(bs, sector_num,
- pad_buf, s->cluster_sectors);
- qemu_vfree(pad_buf);
+ buf = qemu_blockalign(bs, s->cluster_size);
+ if (bytes != s->cluster_size) {
+ if (bytes > s->cluster_size ||
+ offset + bytes != bs->total_sectors << BDRV_SECTOR_BITS)
+ {
+ qemu_vfree(buf);
+ return -EINVAL;
}
- return ret;
+ /* Zero-pad last write if image size is not cluster aligned */
+ memset(buf + bytes, 0, s->cluster_size - bytes);
}
+ qemu_iovec_to_buf(qiov, 0, buf, qiov->size);
- out_buf = g_malloc(s->cluster_size + (s->cluster_size / 1000) + 128);
+ out_buf = g_malloc(s->cluster_size);
/* best compression, small window, no zlib header */
memset(&strm, 0, sizeof(strm));
if (ret != Z_STREAM_END || out_len >= s->cluster_size) {
/* could not compress: write normal cluster */
- ret = bdrv_write(bs, sector_num, buf, s->cluster_sectors);
- if (ret < 0) {
- goto fail;
- }
- } else {
- cluster_offset = get_cluster_offset(bs, sector_num << 9, 2,
- out_len, 0, 0);
- if (cluster_offset == 0) {
- ret = -EIO;
- goto fail;
- }
-
- cluster_offset &= s->cluster_offset_mask;
- ret = bdrv_pwrite(bs->file->bs, cluster_offset, out_buf, out_len);
+ ret = qcow_co_writev(bs, offset >> BDRV_SECTOR_BITS,
+ bytes >> BDRV_SECTOR_BITS, qiov);
if (ret < 0) {
goto fail;
}
+ goto success;
}
-
+ qemu_co_mutex_lock(&s->lock);
+ cluster_offset = get_cluster_offset(bs, offset, 2, out_len, 0, 0);
+ qemu_co_mutex_unlock(&s->lock);
+ if (cluster_offset == 0) {
+ ret = -EIO;
+ goto fail;
+ }
+ cluster_offset &= s->cluster_offset_mask;
+
+ iov = (struct iovec) {
+ .iov_base = out_buf,
+ .iov_len = out_len,
+ };
+ qemu_iovec_init_external(&hd_qiov, &iov, 1);
+ ret = bdrv_co_pwritev(bs->file, cluster_offset, out_len, &hd_qiov, 0);
+ if (ret < 0) {
+ goto fail;
+ }
+success:
ret = 0;
fail:
+ qemu_vfree(buf);
g_free(out_buf);
return ret;
}
.bdrv_probe = qcow_probe,
.bdrv_open = qcow_open,
.bdrv_close = qcow_close,
+ .bdrv_child_perm = bdrv_format_default_perms,
.bdrv_reopen_prepare = qcow_reopen_prepare,
.bdrv_create = qcow_create,
.bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_set_key = qcow_set_key,
.bdrv_make_empty = qcow_make_empty,
- .bdrv_write_compressed = qcow_write_compressed,
+ .bdrv_co_pwritev_compressed = qcow_co_pwritev_compressed,
.bdrv_get_info = qcow_get_info,
.create_opts = &qcow_create_opts,
projects / mirror_qemu.git / blobdiff