2 * Block protocol for block driver correctness testing
4 * Copyright (C) 2010 IBM, Corp.
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
11 #include "qemu/sockets.h" /* for EINPROGRESS on Windows */
12 #include "block/block_int.h"
13 #include "qapi/qmp/qdict.h"
14 #include "qapi/qmp/qstring.h"
17 BlockDriverState *test_file;
20 typedef struct BlkverifyAIOCB BlkverifyAIOCB;
21 struct BlkverifyAIOCB {
25 /* Request metadata */
30 int ret; /* first completed request's result */
31 unsigned int done; /* completion counter */
33 QEMUIOVector *qiov; /* user I/O vector */
34 QEMUIOVector raw_qiov; /* cloned I/O vector for raw file */
35 void *buf; /* buffer for raw file I/O */
37 void (*verify)(BlkverifyAIOCB *acb);
40 static const AIOCBInfo blkverify_aiocb_info = {
41 .aiocb_size = sizeof(BlkverifyAIOCB),
44 static void GCC_FMT_ATTR(2, 3) blkverify_err(BlkverifyAIOCB *acb,
50 fprintf(stderr, "blkverify: %s sector_num=%" PRId64 " nb_sectors=%d ",
51 acb->is_write ? "write" : "read", acb->sector_num,
53 vfprintf(stderr, fmt, ap);
54 fprintf(stderr, "\n");
59 /* Valid blkverify filenames look like blkverify:path/to/raw_image:path/to/image */
60 static void blkverify_parse_filename(const char *filename, QDict *options,
67 /* Parse the blkverify: prefix */
68 if (!strstart(filename, "blkverify:", &filename)) {
69 /* There was no prefix; therefore, all options have to be already
70 present in the QDict (except for the filename) */
71 qdict_put(options, "x-image", qstring_from_str(filename));
75 /* Parse the raw image filename */
76 c = strchr(filename, ':');
78 error_setg(errp, "blkverify requires raw copy and original image path");
82 /* TODO Implement option pass-through and set raw.filename here */
83 raw_path = qstring_from_substr(filename, 0, c - filename - 1);
84 qdict_put(options, "x-raw", raw_path);
86 /* TODO Allow multi-level nesting and set file.filename here */
88 qdict_put(options, "x-image", qstring_from_str(filename));
91 static QemuOptsList runtime_opts = {
93 .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
97 .type = QEMU_OPT_STRING,
98 .help = "[internal use only, will be removed]",
102 .type = QEMU_OPT_STRING,
103 .help = "[internal use only, will be removed]",
105 { /* end of list */ }
109 static int blkverify_open(BlockDriverState *bs, QDict *options, int flags,
112 BDRVBlkverifyState *s = bs->opaque;
114 Error *local_err = NULL;
117 opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
118 qemu_opts_absorb_qdict(opts, options, &local_err);
120 error_propagate(errp, local_err);
125 /* Open the raw file */
126 assert(bs->file == NULL);
127 ret = bdrv_open_image(&bs->file, qemu_opt_get(opts, "x-raw"), options,
128 "raw", flags | BDRV_O_PROTOCOL, false, &local_err);
130 error_propagate(errp, local_err);
134 /* Open the test file */
135 assert(s->test_file == NULL);
136 ret = bdrv_open_image(&s->test_file, qemu_opt_get(opts, "x-image"), options,
137 "test", flags, false, &local_err);
139 error_propagate(errp, local_err);
150 static void blkverify_close(BlockDriverState *bs)
152 BDRVBlkverifyState *s = bs->opaque;
154 bdrv_unref(s->test_file);
158 static int64_t blkverify_getlength(BlockDriverState *bs)
160 BDRVBlkverifyState *s = bs->opaque;
162 return bdrv_getlength(s->test_file);
165 static BlkverifyAIOCB *blkverify_aio_get(BlockDriverState *bs, bool is_write,
166 int64_t sector_num, QEMUIOVector *qiov,
168 BlockCompletionFunc *cb,
171 BlkverifyAIOCB *acb = qemu_aio_get(&blkverify_aiocb_info, bs, cb, opaque);
174 acb->is_write = is_write;
175 acb->sector_num = sector_num;
176 acb->nb_sectors = nb_sectors;
177 acb->ret = -EINPROGRESS;
185 static void blkverify_aio_bh(void *opaque)
187 BlkverifyAIOCB *acb = opaque;
189 qemu_bh_delete(acb->bh);
191 qemu_iovec_destroy(&acb->raw_qiov);
192 qemu_vfree(acb->buf);
194 acb->common.cb(acb->common.opaque, acb->ret);
198 static void blkverify_aio_cb(void *opaque, int ret)
200 BlkverifyAIOCB *acb = opaque;
202 switch (++acb->done) {
208 if (acb->ret != ret) {
209 blkverify_err(acb, "return value mismatch %d != %d", acb->ret, ret);
216 acb->bh = aio_bh_new(bdrv_get_aio_context(acb->common.bs),
217 blkverify_aio_bh, acb);
218 qemu_bh_schedule(acb->bh);
223 static void blkverify_verify_readv(BlkverifyAIOCB *acb)
225 ssize_t offset = qemu_iovec_compare(acb->qiov, &acb->raw_qiov);
227 blkverify_err(acb, "contents mismatch in sector %" PRId64,
228 acb->sector_num + (int64_t)(offset / BDRV_SECTOR_SIZE));
232 static BlockAIOCB *blkverify_aio_readv(BlockDriverState *bs,
233 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
234 BlockCompletionFunc *cb, void *opaque)
236 BDRVBlkverifyState *s = bs->opaque;
237 BlkverifyAIOCB *acb = blkverify_aio_get(bs, false, sector_num, qiov,
238 nb_sectors, cb, opaque);
240 acb->verify = blkverify_verify_readv;
241 acb->buf = qemu_blockalign(bs->file, qiov->size);
242 qemu_iovec_init(&acb->raw_qiov, acb->qiov->niov);
243 qemu_iovec_clone(&acb->raw_qiov, qiov, acb->buf);
245 bdrv_aio_readv(s->test_file, sector_num, qiov, nb_sectors,
246 blkverify_aio_cb, acb);
247 bdrv_aio_readv(bs->file, sector_num, &acb->raw_qiov, nb_sectors,
248 blkverify_aio_cb, acb);
252 static BlockAIOCB *blkverify_aio_writev(BlockDriverState *bs,
253 int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
254 BlockCompletionFunc *cb, void *opaque)
256 BDRVBlkverifyState *s = bs->opaque;
257 BlkverifyAIOCB *acb = blkverify_aio_get(bs, true, sector_num, qiov,
258 nb_sectors, cb, opaque);
260 bdrv_aio_writev(s->test_file, sector_num, qiov, nb_sectors,
261 blkverify_aio_cb, acb);
262 bdrv_aio_writev(bs->file, sector_num, qiov, nb_sectors,
263 blkverify_aio_cb, acb);
267 static BlockAIOCB *blkverify_aio_flush(BlockDriverState *bs,
268 BlockCompletionFunc *cb,
271 BDRVBlkverifyState *s = bs->opaque;
273 /* Only flush test file, the raw file is not important */
274 return bdrv_aio_flush(s->test_file, cb, opaque);
277 static bool blkverify_recurse_is_first_non_filter(BlockDriverState *bs,
278 BlockDriverState *candidate)
280 BDRVBlkverifyState *s = bs->opaque;
282 bool perm = bdrv_recurse_is_first_non_filter(bs->file, candidate);
288 return bdrv_recurse_is_first_non_filter(s->test_file, candidate);
291 /* Propagate AioContext changes to ->test_file */
292 static void blkverify_detach_aio_context(BlockDriverState *bs)
294 BDRVBlkverifyState *s = bs->opaque;
296 bdrv_detach_aio_context(s->test_file);
299 static void blkverify_attach_aio_context(BlockDriverState *bs,
300 AioContext *new_context)
302 BDRVBlkverifyState *s = bs->opaque;
304 bdrv_attach_aio_context(s->test_file, new_context);
307 static void blkverify_refresh_filename(BlockDriverState *bs)
309 BDRVBlkverifyState *s = bs->opaque;
311 /* bs->file has already been refreshed */
312 bdrv_refresh_filename(s->test_file);
314 if (bs->file->full_open_options && s->test_file->full_open_options) {
315 QDict *opts = qdict_new();
316 qdict_put_obj(opts, "driver", QOBJECT(qstring_from_str("blkverify")));
318 QINCREF(bs->file->full_open_options);
319 qdict_put_obj(opts, "raw", QOBJECT(bs->file->full_open_options));
320 QINCREF(s->test_file->full_open_options);
321 qdict_put_obj(opts, "test", QOBJECT(s->test_file->full_open_options));
323 bs->full_open_options = opts;
326 if (bs->file->exact_filename[0] && s->test_file->exact_filename[0]) {
327 snprintf(bs->exact_filename, sizeof(bs->exact_filename),
329 bs->file->exact_filename, s->test_file->exact_filename);
333 static BlockDriver bdrv_blkverify = {
334 .format_name = "blkverify",
335 .protocol_name = "blkverify",
336 .instance_size = sizeof(BDRVBlkverifyState),
338 .bdrv_parse_filename = blkverify_parse_filename,
339 .bdrv_file_open = blkverify_open,
340 .bdrv_close = blkverify_close,
341 .bdrv_getlength = blkverify_getlength,
342 .bdrv_refresh_filename = blkverify_refresh_filename,
344 .bdrv_aio_readv = blkverify_aio_readv,
345 .bdrv_aio_writev = blkverify_aio_writev,
346 .bdrv_aio_flush = blkverify_aio_flush,
348 .bdrv_attach_aio_context = blkverify_attach_aio_context,
349 .bdrv_detach_aio_context = blkverify_detach_aio_context,
352 .bdrv_recurse_is_first_non_filter = blkverify_recurse_is_first_non_filter,
355 static void bdrv_blkverify_init(void)
357 bdrv_register(&bdrv_blkverify);
360 block_init(bdrv_blkverify_init);