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[pve-qemu.git] / debian / patches / pve / 0028-adding-old-vma-files.patch
1 From 19761ee4aa12da9a3e4028cc611a18d972559de0 Mon Sep 17 00:00:00 2001
2 From: Wolfgang Bumiller <w.bumiller@proxmox.com>
3 Date: Mon, 7 Aug 2017 08:51:16 +0200
4 Subject: [PATCH 28/28] adding old vma files
5
6 ---
7 Makefile | 3 +-
8 Makefile.objs | 1 +
9 block/backup.c | 132 ++++---
10 block/replication.c | 1 +
11 blockdev.c | 250 +++++++++-----
12 blockjob.c | 11 +-
13 include/block/block_int.h | 4 +
14 vma-reader.c | 857 ++++++++++++++++++++++++++++++++++++++++++++++
15 vma-writer.c | 771 +++++++++++++++++++++++++++++++++++++++++
16 vma.c | 757 ++++++++++++++++++++++++++++++++++++++++
17 vma.h | 149 ++++++++
18 11 files changed, 2802 insertions(+), 134 deletions(-)
19 create mode 100644 vma-reader.c
20 create mode 100644 vma-writer.c
21 create mode 100644 vma.c
22 create mode 100644 vma.h
23
24 diff --git a/Makefile b/Makefile
25 index 6c359b2f86..edbc8b50f0 100644
26 --- a/Makefile
27 +++ b/Makefile
28 @@ -284,7 +284,7 @@ ifneq ($(wildcard config-host.mak),)
29 include $(SRC_PATH)/tests/Makefile.include
30 endif
31
32 -all: $(DOCS) $(TOOLS) $(HELPERS-y) recurse-all modules
33 +all: $(DOCS) $(TOOLS) vma$(EXESUF) $(HELPERS-y) recurse-all modules
34
35 qemu-version.h: FORCE
36 $(call quiet-command, \
37 @@ -377,6 +377,7 @@ qemu-img.o: qemu-img-cmds.h
38 qemu-img$(EXESUF): qemu-img.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
39 qemu-nbd$(EXESUF): qemu-nbd.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
40 qemu-io$(EXESUF): qemu-io.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
41 +vma$(EXESUF): vma.o vma-reader.o $(block-obj-y) $(crypto-obj-y) $(io-obj-y) $(qom-obj-y) $(COMMON_LDADDS)
42
43 qemu-bridge-helper$(EXESUF): qemu-bridge-helper.o $(COMMON_LDADDS)
44
45 diff --git a/Makefile.objs b/Makefile.objs
46 index fbfbbb7f70..f5f8dbab3b 100644
47 --- a/Makefile.objs
48 +++ b/Makefile.objs
49 @@ -14,6 +14,7 @@ block-obj-y += block.o blockjob.o
50 block-obj-y += block/
51 block-obj-y += qemu-io-cmds.o
52 block-obj-$(CONFIG_REPLICATION) += replication.o
53 +block-obj-y += vma-writer.o
54
55 block-obj-m = block/
56
57 diff --git a/block/backup.c b/block/backup.c
58 index 1ede70c061..7c5febc434 100644
59 --- a/block/backup.c
60 +++ b/block/backup.c
61 @@ -36,6 +36,7 @@ typedef struct BackupBlockJob {
62 BdrvDirtyBitmap *sync_bitmap;
63 MirrorSyncMode sync_mode;
64 RateLimit limit;
65 + BackupDumpFunc *dump_cb;
66 BlockdevOnError on_source_error;
67 BlockdevOnError on_target_error;
68 CoRwlock flush_rwlock;
69 @@ -145,13 +146,24 @@ static int coroutine_fn backup_do_cow(BackupBlockJob *job,
70 goto out;
71 }
72
73 + int64_t start_sec = start * sectors_per_cluster;
74 if (buffer_is_zero(iov.iov_base, iov.iov_len)) {
75 - ret = blk_co_pwrite_zeroes(job->target, start * job->cluster_size,
76 - bounce_qiov.size, BDRV_REQ_MAY_UNMAP);
77 + if (job->dump_cb) {
78 + ret = job->dump_cb(job->common.opaque, job->target, start_sec, n, NULL);
79 + }
80 + if (job->target) {
81 + ret = blk_co_pwrite_zeroes(job->target, start * job->cluster_size,
82 + bounce_qiov.size, BDRV_REQ_MAY_UNMAP);
83 + }
84 } else {
85 - ret = blk_co_pwritev(job->target, start * job->cluster_size,
86 - bounce_qiov.size, &bounce_qiov,
87 - job->compress ? BDRV_REQ_WRITE_COMPRESSED : 0);
88 + if (job->dump_cb) {
89 + ret = job->dump_cb(job->common.opaque, job->target, start_sec, n, bounce_buffer);
90 + }
91 + if (job->target) {
92 + ret = blk_co_pwritev(job->target, start * job->cluster_size,
93 + bounce_qiov.size, &bounce_qiov,
94 + job->compress ? BDRV_REQ_WRITE_COMPRESSED : 0);
95 + }
96 }
97 if (ret < 0) {
98 trace_backup_do_cow_write_fail(job, start, ret);
99 @@ -246,6 +258,9 @@ static void backup_abort(BlockJob *job)
100 static void backup_clean(BlockJob *job)
101 {
102 BackupBlockJob *s = container_of(job, BackupBlockJob, common);
103 + if (!s->target) {
104 + return;
105 + }
106 assert(s->target);
107 blk_unref(s->target);
108 s->target = NULL;
109 @@ -255,7 +270,9 @@ static void backup_attached_aio_context(BlockJob *job, AioContext *aio_context)
110 {
111 BackupBlockJob *s = container_of(job, BackupBlockJob, common);
112
113 - blk_set_aio_context(s->target, aio_context);
114 + if (s->target) {
115 + blk_set_aio_context(s->target, aio_context);
116 + }
117 }
118
119 void backup_do_checkpoint(BlockJob *job, Error **errp)
120 @@ -330,9 +347,11 @@ static BlockErrorAction backup_error_action(BackupBlockJob *job,
121 if (read) {
122 return block_job_error_action(&job->common, job->on_source_error,
123 true, error);
124 - } else {
125 + } else if (job->target) {
126 return block_job_error_action(&job->common, job->on_target_error,
127 false, error);
128 + } else {
129 + return BLOCK_ERROR_ACTION_REPORT;
130 }
131 }
132
133 @@ -557,6 +576,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
134 BlockdevOnError on_source_error,
135 BlockdevOnError on_target_error,
136 int creation_flags,
137 + BackupDumpFunc *dump_cb,
138 BlockCompletionFunc *cb, void *opaque,
139 int pause_count,
140 BlockJobTxn *txn, Error **errp)
141 @@ -567,7 +587,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
142 int ret;
143
144 assert(bs);
145 - assert(target);
146 + assert(target || dump_cb);
147
148 if (bs == target) {
149 error_setg(errp, "Source and target cannot be the same");
150 @@ -580,13 +600,13 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
151 return NULL;
152 }
153
154 - if (!bdrv_is_inserted(target)) {
155 + if (target && !bdrv_is_inserted(target)) {
156 error_setg(errp, "Device is not inserted: %s",
157 bdrv_get_device_name(target));
158 return NULL;
159 }
160
161 - if (compress && target->drv->bdrv_co_pwritev_compressed == NULL) {
162 + if (target && compress && target->drv->bdrv_co_pwritev_compressed == NULL) {
163 error_setg(errp, "Compression is not supported for this drive %s",
164 bdrv_get_device_name(target));
165 return NULL;
166 @@ -596,7 +616,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
167 return NULL;
168 }
169
170 - if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_BACKUP_TARGET, errp)) {
171 + if (target && bdrv_op_is_blocked(target, BLOCK_OP_TYPE_BACKUP_TARGET, errp)) {
172 return NULL;
173 }
174
175 @@ -636,15 +656,18 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
176 goto error;
177 }
178
179 - /* The target must match the source in size, so no resize here either */
180 - job->target = blk_new(BLK_PERM_WRITE,
181 - BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
182 - BLK_PERM_WRITE_UNCHANGED | BLK_PERM_GRAPH_MOD);
183 - ret = blk_insert_bs(job->target, target, errp);
184 - if (ret < 0) {
185 - goto error;
186 + if (target) {
187 + /* The target must match the source in size, so no resize here either */
188 + job->target = blk_new(BLK_PERM_WRITE,
189 + BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE |
190 + BLK_PERM_WRITE_UNCHANGED | BLK_PERM_GRAPH_MOD);
191 + ret = blk_insert_bs(job->target, target, errp);
192 + if (ret < 0) {
193 + goto error;
194 + }
195 }
196
197 + job->dump_cb = dump_cb;
198 job->on_source_error = on_source_error;
199 job->on_target_error = on_target_error;
200 job->sync_mode = sync_mode;
201 @@ -652,38 +675,55 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
202 sync_bitmap : NULL;
203 job->compress = compress;
204
205 - /* If there is no backing file on the target, we cannot rely on COW if our
206 - * backup cluster size is smaller than the target cluster size. Even for
207 - * targets with a backing file, try to avoid COW if possible. */
208 - ret = bdrv_get_info(target, &bdi);
209 - if (ret == -ENOTSUP && !target->backing) {
210 - /* Cluster size is not defined */
211 - error_report("WARNING: The target block device doesn't provide "
212 - "information about the block size and it doesn't have a "
213 - "backing file. The default block size of %u bytes is "
214 - "used. If the actual block size of the target exceeds "
215 - "this default, the backup may be unusable",
216 - BACKUP_CLUSTER_SIZE_DEFAULT);
217 - job->cluster_size = BACKUP_CLUSTER_SIZE_DEFAULT;
218 - } else if (ret < 0 && !target->backing) {
219 - error_setg_errno(errp, -ret,
220 - "Couldn't determine the cluster size of the target image, "
221 - "which has no backing file");
222 - error_append_hint(errp,
223 - "Aborting, since this may create an unusable destination image\n");
224 - goto error;
225 - } else if (ret < 0 && target->backing) {
226 - /* Not fatal; just trudge on ahead. */
227 - job->cluster_size = BACKUP_CLUSTER_SIZE_DEFAULT;
228 + if (target) {
229 + /* If there is no backing file on the target, we cannot rely on COW if our
230 + * backup cluster size is smaller than the target cluster size. Even for
231 + * targets with a backing file, try to avoid COW if possible. */
232 + ret = bdrv_get_info(target, &bdi);
233 + if (ret == -ENOTSUP && !target->backing) {
234 + /* Cluster size is not defined */
235 + error_report("WARNING: The target block device doesn't provide "
236 + "information about the block size and it doesn't have a "
237 + "backing file. The default block size of %u bytes is "
238 + "used. If the actual block size of the target exceeds "
239 + "this default, the backup may be unusable",
240 + BACKUP_CLUSTER_SIZE_DEFAULT);
241 + job->cluster_size = BACKUP_CLUSTER_SIZE_DEFAULT;
242 + } else if (ret < 0 && !target->backing) {
243 + error_setg_errno(errp, -ret,
244 + "Couldn't determine the cluster size of the target image, "
245 + "which has no backing file");
246 + error_append_hint(errp,
247 + "Aborting, since this may create an unusable destination image\n");
248 + goto error;
249 + } else if (ret < 0 && target->backing) {
250 + /* Not fatal; just trudge on ahead. */
251 + job->cluster_size = BACKUP_CLUSTER_SIZE_DEFAULT;
252 + } else {
253 + job->cluster_size = MAX(BACKUP_CLUSTER_SIZE_DEFAULT, bdi.cluster_size);
254 + }
255 } else {
256 - job->cluster_size = MAX(BACKUP_CLUSTER_SIZE_DEFAULT, bdi.cluster_size);
257 + ret = bdrv_get_info(bs, &bdi);
258 + if (ret < 0) {
259 + job->cluster_size = BACKUP_CLUSTER_SIZE_DEFAULT;
260 + } else {
261 + /* round down to nearest BACKUP_CLUSTER_SIZE_DEFAULT */
262 + job->cluster_size = (bdi.cluster_size / BACKUP_CLUSTER_SIZE_DEFAULT) * BACKUP_CLUSTER_SIZE_DEFAULT;
263 + if (job->cluster_size == 0) {
264 + /* but we can't go below it */
265 + job->cluster_size = BACKUP_CLUSTER_SIZE_DEFAULT;
266 + }
267 + }
268 }
269
270 - /* Required permissions are already taken with target's blk_new() */
271 - block_job_add_bdrv(&job->common, "target", target, 0, BLK_PERM_ALL,
272 - &error_abort);
273 + if (target) {
274 + /* Required permissions are already taken with target's blk_new() */
275 + block_job_add_bdrv(&job->common, "target", target, 0, BLK_PERM_ALL,
276 + &error_abort);
277 + } else {
278 + job->common.pause_count = pause_count;
279 + }
280 job->common.len = len;
281 - job->common.pause_count = pause_count;
282 block_job_txn_add_job(txn, &job->common);
283
284 return &job->common;
285 diff --git a/block/replication.c b/block/replication.c
286 index 1c41d9e6bf..60c6524417 100644
287 --- a/block/replication.c
288 +++ b/block/replication.c
289 @@ -531,6 +531,7 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode,
290 0, MIRROR_SYNC_MODE_NONE, NULL, false,
291 BLOCKDEV_ON_ERROR_REPORT,
292 BLOCKDEV_ON_ERROR_REPORT, BLOCK_JOB_INTERNAL,
293 + NULL,
294 backup_job_completed, bs, 0, NULL, &local_err);
295 if (local_err) {
296 error_propagate(errp, local_err);
297 diff --git a/blockdev.c b/blockdev.c
298 index 981276692a..76a7103743 100644
299 --- a/blockdev.c
300 +++ b/blockdev.c
301 @@ -31,7 +31,6 @@
302 */
303
304 #include "qemu/osdep.h"
305 -#include "qemu/uuid.h"
306 #include "sysemu/block-backend.h"
307 #include "sysemu/blockdev.h"
308 #include "hw/block/block.h"
309 @@ -55,6 +54,7 @@
310 #include "qemu/cutils.h"
311 #include "qemu/help_option.h"
312 #include "qemu/throttle-options.h"
313 +#include "vma.h"
314
315 static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
316 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
317 @@ -2958,20 +2958,44 @@ out:
318 aio_context_release(aio_context);
319 }
320
321 +void block_job_event_cancelled(BlockJob *job);
322 +void block_job_event_completed(BlockJob *job, const char *msg);
323 +static void block_job_cb(void *opaque, int ret)
324 +{
325 + /* Note that this function may be executed from another AioContext besides
326 + * the QEMU main loop. If you need to access anything that assumes the
327 + * QEMU global mutex, use a BH or introduce a mutex.
328 + */
329 +
330 + BlockDriverState *bs = opaque;
331 + const char *msg = NULL;
332 +
333 + assert(bs->job);
334 +
335 + if (ret < 0) {
336 + msg = strerror(-ret);
337 + }
338 +
339 + if (block_job_is_cancelled(bs->job)) {
340 + block_job_event_cancelled(bs->job);
341 + } else {
342 + block_job_event_completed(bs->job, msg);
343 + }
344 +}
345 +
346 /* PVE backup related function */
347
348 static struct PVEBackupState {
349 Error *error;
350 bool cancel;
351 - QemuUUID uuid;
352 + uuid_t uuid;
353 char uuid_str[37];
354 int64_t speed;
355 time_t start_time;
356 time_t end_time;
357 char *backup_file;
358 - Object *vmaobj;
359 + VmaWriter *vmaw;
360 GList *di_list;
361 - size_t next_job;
362 size_t total;
363 size_t transferred;
364 size_t zero_bytes;
365 @@ -2981,6 +3005,7 @@ typedef struct PVEBackupDevInfo {
366 BlockDriverState *bs;
367 size_t size;
368 uint8_t dev_id;
369 + //bool started;
370 bool completed;
371 char targetfile[PATH_MAX];
372 BlockDriverState *target;
373 @@ -2988,13 +3013,79 @@ typedef struct PVEBackupDevInfo {
374
375 static void pvebackup_run_next_job(void);
376
377 +static int pvebackup_dump_cb(void *opaque, BlockBackend *target,
378 + int64_t sector_num, int n_sectors,
379 + unsigned char *buf)
380 +{
381 + PVEBackupDevInfo *di = opaque;
382 +
383 + int size = n_sectors * BDRV_SECTOR_SIZE;
384 + if (backup_state.cancel) {
385 + return size; // return success
386 + }
387 +
388 + if (sector_num & 0x7f) {
389 + if (!backup_state.error) {
390 + error_setg(&backup_state.error,
391 + "got unaligned write inside backup dump "
392 + "callback (sector %ld)", sector_num);
393 + }
394 + return -1; // not aligned to cluster size
395 + }
396 +
397 + int64_t cluster_num = sector_num >> 7;
398 +
399 + int ret = -1;
400 +
401 + if (backup_state.vmaw) {
402 + size_t zero_bytes = 0;
403 + int64_t remaining = n_sectors * BDRV_SECTOR_SIZE;
404 + while (remaining > 0) {
405 + ret = vma_writer_write(backup_state.vmaw, di->dev_id, cluster_num,
406 + buf, &zero_bytes);
407 + ++cluster_num;
408 + if (buf) {
409 + buf += VMA_CLUSTER_SIZE;
410 + }
411 + if (ret < 0) {
412 + if (!backup_state.error) {
413 + vma_writer_error_propagate(backup_state.vmaw, &backup_state.error);
414 + }
415 + if (di->bs && di->bs->job) {
416 + block_job_cancel(di->bs->job);
417 + }
418 + break;
419 + } else {
420 + backup_state.zero_bytes += zero_bytes;
421 + if (remaining >= VMA_CLUSTER_SIZE) {
422 + backup_state.transferred += VMA_CLUSTER_SIZE;
423 + } else {
424 + backup_state.transferred += remaining;
425 + }
426 + remaining -= VMA_CLUSTER_SIZE;
427 + }
428 + }
429 + } else {
430 + if (!buf) {
431 + backup_state.zero_bytes += size;
432 + }
433 + backup_state.transferred += size;
434 + }
435 +
436 + // Note: always return success, because we want that writes succeed anyways.
437 +
438 + return size;
439 +}
440 +
441 static void pvebackup_cleanup(void)
442 {
443 backup_state.end_time = time(NULL);
444
445 - if (backup_state.vmaobj) {
446 - object_unparent(backup_state.vmaobj);
447 - backup_state.vmaobj = NULL;
448 + if (backup_state.vmaw) {
449 + Error *local_err = NULL;
450 + vma_writer_close(backup_state.vmaw, &local_err);
451 + error_propagate(&backup_state.error, local_err);
452 + backup_state.vmaw = NULL;
453 }
454
455 if (backup_state.di_list) {
456 @@ -3009,6 +3100,13 @@ static void pvebackup_cleanup(void)
457 }
458 }
459
460 +static void coroutine_fn backup_close_vma_stream(void *opaque)
461 +{
462 + PVEBackupDevInfo *di = opaque;
463 +
464 + vma_writer_close_stream(backup_state.vmaw, di->dev_id);
465 +}
466 +
467 static void pvebackup_complete_cb(void *opaque, int ret)
468 {
469 PVEBackupDevInfo *di = opaque;
470 @@ -3020,14 +3118,18 @@ static void pvebackup_complete_cb(void *opaque, int ret)
471 ret, strerror(-ret));
472 }
473
474 + BlockDriverState *bs = di->bs;
475 +
476 di->bs = NULL;
477 di->target = NULL;
478
479 - if (backup_state.vmaobj) {
480 - object_unparent(backup_state.vmaobj);
481 - backup_state.vmaobj = NULL;
482 + if (backup_state.vmaw) {
483 + Coroutine *co = qemu_coroutine_create(backup_close_vma_stream, di);
484 + qemu_coroutine_enter(co);
485 }
486
487 + block_job_cb(bs, ret);
488 +
489 if (!backup_state.cancel) {
490 pvebackup_run_next_job();
491 }
492 @@ -3041,14 +3143,9 @@ static void pvebackup_cancel(void *opaque)
493 error_setg(&backup_state.error, "backup cancelled");
494 }
495
496 - if (backup_state.vmaobj) {
497 - Error *err;
498 + if (backup_state.vmaw) {
499 /* make sure vma writer does not block anymore */
500 - if (!object_set_props(backup_state.vmaobj, &err, "blocked", "yes", NULL)) {
501 - if (err) {
502 - error_report_err(err);
503 - }
504 - }
505 + vma_writer_set_error(backup_state.vmaw, "backup cancelled");
506 }
507
508 GList *l = backup_state.di_list;
509 @@ -3073,19 +3170,15 @@ void qmp_backup_cancel(Error **errp)
510 Coroutine *co = qemu_coroutine_create(pvebackup_cancel, NULL);
511 qemu_coroutine_enter(co);
512
513 - while (backup_state.vmaobj) {
514 - /* FIXME: Find something better for this */
515 + while (backup_state.vmaw) {
516 + /* vma writer use main aio context */
517 aio_poll(qemu_get_aio_context(), true);
518 }
519 }
520
521 -void vma_object_add_config_file(Object *obj, const char *name,
522 - const char *contents, size_t len,
523 - Error **errp);
524 static int config_to_vma(const char *file, BackupFormat format,
525 - Object *vmaobj,
526 - const char *backup_dir,
527 - Error **errp)
528 + const char *backup_dir, VmaWriter *vmaw,
529 + Error **errp)
530 {
531 char *cdata = NULL;
532 gsize clen = 0;
533 @@ -3098,12 +3191,17 @@ static int config_to_vma(const char *file, BackupFormat format,
534 char *basename = g_path_get_basename(file);
535
536 if (format == BACKUP_FORMAT_VMA) {
537 - vma_object_add_config_file(vmaobj, basename, cdata, clen, errp);
538 + if (vma_writer_add_config(vmaw, basename, cdata, clen) != 0) {
539 + error_setg(errp, "unable to add %s config data to vma archive", file);
540 + g_free(cdata);
541 + g_free(basename);
542 + return 1;
543 + }
544 } else if (format == BACKUP_FORMAT_DIR) {
545 char config_path[PATH_MAX];
546 snprintf(config_path, PATH_MAX, "%s/%s", backup_dir, basename);
547 if (!g_file_set_contents(config_path, cdata, clen, &err)) {
548 - error_setg(errp, "unable to write config file '%s'", config_path);
549 + error_setg(errp, "unable to write config file '%s'", config_path);
550 g_free(cdata);
551 g_free(basename);
552 return 1;
553 @@ -3113,35 +3211,37 @@ static int config_to_vma(const char *file, BackupFormat format,
554 g_free(basename);
555 g_free(cdata);
556
557 - return 0;
558 + return 0;
559 }
560
561 +bool block_job_should_pause(BlockJob *job);
562 static void pvebackup_run_next_job(void)
563 {
564 - bool cancel = backup_state.error || backup_state.cancel;
565 -fprintf(stderr, "run next job: %zu\n", backup_state.next_job);
566 - GList *next = g_list_nth(backup_state.di_list, backup_state.next_job);
567 - while (next) {
568 - PVEBackupDevInfo *di = (PVEBackupDevInfo *)next->data;
569 - backup_state.next_job++;
570 + GList *l = backup_state.di_list;
571 + while (l) {
572 + PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
573 + l = g_list_next(l);
574 if (!di->completed && di->bs && di->bs->job) {
575 BlockJob *job = di->bs->job;
576 - if (cancel) {
577 - block_job_cancel(job);
578 - } else {
579 - block_job_resume(job);
580 + if (block_job_should_pause(job)) {
581 + bool cancel = backup_state.error || backup_state.cancel;
582 + if (cancel) {
583 + block_job_cancel(job);
584 + } else {
585 + block_job_resume(job);
586 + }
587 }
588 return;
589 }
590 - next = g_list_next(next);
591 }
592 +
593 pvebackup_cleanup();
594 }
595
596 UuidInfo *qmp_backup(const char *backup_file, bool has_format,
597 BackupFormat format,
598 bool has_config_file, const char *config_file,
599 - bool has_firewall_file, const char *firewall_file,
600 + bool has_firewall_file, const char *firewall_file,
601 bool has_devlist, const char *devlist,
602 bool has_speed, int64_t speed, Error **errp)
603 {
604 @@ -3149,14 +3249,15 @@ UuidInfo *qmp_backup(const char *backup_file, bool has_format,
605 BlockDriverState *bs = NULL;
606 const char *backup_dir = NULL;
607 Error *local_err = NULL;
608 - QemuUUID uuid;
609 + uuid_t uuid;
610 + VmaWriter *vmaw = NULL;
611 gchar **devs = NULL;
612 GList *di_list = NULL;
613 GList *l;
614 UuidInfo *uuid_info;
615 BlockJob *job;
616
617 - if (backup_state.di_list || backup_state.vmaobj) {
618 + if (backup_state.di_list) {
619 error_set(errp, ERROR_CLASS_GENERIC_ERROR,
620 "previous backup not finished");
621 return NULL;
622 @@ -3231,40 +3332,28 @@ UuidInfo *qmp_backup(const char *backup_file, bool has_format,
623 total += size;
624 }
625
626 - qemu_uuid_generate(&uuid);
627 + uuid_generate(uuid);
628
629 if (format == BACKUP_FORMAT_VMA) {
630 - char uuidstr[UUID_FMT_LEN+1];
631 - qemu_uuid_unparse(&uuid, uuidstr);
632 - uuidstr[UUID_FMT_LEN] = 0;
633 - backup_state.vmaobj =
634 - object_new_with_props("vma", object_get_objects_root(),
635 - "vma-backup-obj", &local_err,
636 - "filename", backup_file,
637 - "uuid", uuidstr,
638 - NULL);
639 - if (!backup_state.vmaobj) {
640 + vmaw = vma_writer_create(backup_file, uuid, &local_err);
641 + if (!vmaw) {
642 if (local_err) {
643 error_propagate(errp, local_err);
644 }
645 goto err;
646 }
647
648 + /* register all devices for vma writer */
649 l = di_list;
650 while (l) {
651 - QDict *options = qdict_new();
652 -
653 PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
654 l = g_list_next(l);
655
656 const char *devname = bdrv_get_device_name(di->bs);
657 - snprintf(di->targetfile, PATH_MAX, "vma-backup-obj/%s.raw", devname);
658 -
659 - qdict_put(options, "driver", qstring_from_str("vma-drive"));
660 - qdict_put(options, "size", qint_from_int(di->size));
661 - di->target = bdrv_open(di->targetfile, NULL, options, BDRV_O_RDWR, &local_err);
662 - if (!di->target) {
663 - error_propagate(errp, local_err);
664 + di->dev_id = vma_writer_register_stream(vmaw, devname, di->size);
665 + if (di->dev_id <= 0) {
666 + error_set(errp, ERROR_CLASS_GENERIC_ERROR,
667 + "register_stream failed");
668 goto err;
669 }
670 }
671 @@ -3305,15 +3394,15 @@ UuidInfo *qmp_backup(const char *backup_file, bool has_format,
672
673 /* add configuration file to archive */
674 if (has_config_file) {
675 - if(config_to_vma(config_file, format, backup_state.vmaobj, backup_dir, errp) != 0) {
676 - goto err;
677 + if(config_to_vma(config_file, format, backup_dir, vmaw, errp) != 0) {
678 + goto err;
679 }
680 }
681
682 /* add firewall file to archive */
683 if (has_firewall_file) {
684 - if(config_to_vma(firewall_file, format, backup_state.vmaobj, backup_dir, errp) != 0) {
685 - goto err;
686 + if(config_to_vma(firewall_file, format, backup_dir, vmaw, errp) != 0) {
687 + goto err;
688 }
689 }
690 /* initialize global backup_state now */
691 @@ -3335,11 +3424,12 @@ UuidInfo *qmp_backup(const char *backup_file, bool has_format,
692 }
693 backup_state.backup_file = g_strdup(backup_file);
694
695 - memcpy(&backup_state.uuid, &uuid, sizeof(uuid));
696 - qemu_uuid_unparse(&uuid, backup_state.uuid_str);
697 + backup_state.vmaw = vmaw;
698 +
699 + uuid_copy(backup_state.uuid, uuid);
700 + uuid_unparse_lower(uuid, backup_state.uuid_str);
701
702 backup_state.di_list = di_list;
703 - backup_state.next_job = 0;
704
705 backup_state.total = total;
706 backup_state.transferred = 0;
707 @@ -3350,21 +3440,16 @@ UuidInfo *qmp_backup(const char *backup_file, bool has_format,
708 while (l) {
709 PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
710 l = g_list_next(l);
711 -
712 job = backup_job_create(NULL, di->bs, di->target, speed, MIRROR_SYNC_MODE_FULL, NULL,
713 false, BLOCKDEV_ON_ERROR_REPORT, BLOCKDEV_ON_ERROR_REPORT,
714 BLOCK_JOB_DEFAULT,
715 - pvebackup_complete_cb, di, 2, NULL, &local_err);
716 - if (di->target) {
717 - bdrv_unref(di->target);
718 - di->target = NULL;
719 - }
720 + pvebackup_dump_cb, pvebackup_complete_cb, di,
721 + 2, NULL, &local_err);
722 if (!job || local_err != NULL) {
723 error_setg(&backup_state.error, "backup_job_create failed");
724 pvebackup_cancel(NULL);
725 - } else {
726 - block_job_start(job);
727 }
728 + block_job_start(job);
729 }
730
731 if (!backup_state.error) {
732 @@ -3398,9 +3483,10 @@ err:
733 g_strfreev(devs);
734 }
735
736 - if (backup_state.vmaobj) {
737 - object_unparent(backup_state.vmaobj);
738 - backup_state.vmaobj = NULL;
739 + if (vmaw) {
740 + Error *err = NULL;
741 + vma_writer_close(vmaw, &err);
742 + unlink(backup_file);
743 }
744
745 if (backup_dir) {
746 @@ -3772,7 +3858,7 @@ static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
747 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
748 backup->sync, bmap, backup->compress,
749 backup->on_source_error, backup->on_target_error,
750 - BLOCK_JOB_DEFAULT, NULL, NULL, 0, txn, &local_err);
751 + BLOCK_JOB_DEFAULT, NULL, NULL, NULL, 0, txn, &local_err);
752 bdrv_unref(target_bs);
753 if (local_err != NULL) {
754 error_propagate(errp, local_err);
755 @@ -3851,7 +3937,7 @@ BlockJob *do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
756 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
757 backup->sync, NULL, backup->compress,
758 backup->on_source_error, backup->on_target_error,
759 - BLOCK_JOB_DEFAULT, NULL, NULL, 0, txn, &local_err);
760 + BLOCK_JOB_DEFAULT, NULL, NULL, NULL, 0, txn, &local_err);
761 if (local_err != NULL) {
762 error_propagate(errp, local_err);
763 }
764 diff --git a/blockjob.c b/blockjob.c
765 index 764d41863e..cb3741f6dd 100644
766 --- a/blockjob.c
767 +++ b/blockjob.c
768 @@ -37,8 +37,8 @@
769 #include "qemu/timer.h"
770 #include "qapi-event.h"
771
772 -static void block_job_event_cancelled(BlockJob *job);
773 -static void block_job_event_completed(BlockJob *job, const char *msg);
774 +void block_job_event_cancelled(BlockJob *job);
775 +void block_job_event_completed(BlockJob *job, const char *msg);
776
777 /* Transactional group of block jobs */
778 struct BlockJobTxn {
779 @@ -473,7 +473,8 @@ void block_job_user_pause(BlockJob *job)
780 block_job_pause(job);
781 }
782
783 -static bool block_job_should_pause(BlockJob *job)
784 +bool block_job_should_pause(BlockJob *job);
785 +bool block_job_should_pause(BlockJob *job)
786 {
787 return job->pause_count > 0;
788 }
789 @@ -687,7 +688,7 @@ static void block_job_iostatus_set_err(BlockJob *job, int error)
790 }
791 }
792
793 -static void block_job_event_cancelled(BlockJob *job)
794 +void block_job_event_cancelled(BlockJob *job)
795 {
796 if (block_job_is_internal(job)) {
797 return;
798 @@ -701,7 +702,7 @@ static void block_job_event_cancelled(BlockJob *job)
799 &error_abort);
800 }
801
802 -static void block_job_event_completed(BlockJob *job, const char *msg)
803 +void block_job_event_completed(BlockJob *job, const char *msg)
804 {
805 if (block_job_is_internal(job)) {
806 return;
807 diff --git a/include/block/block_int.h b/include/block/block_int.h
808 index 2b3ecd0575..278da161fb 100644
809 --- a/include/block/block_int.h
810 +++ b/include/block/block_int.h
811 @@ -59,6 +59,9 @@
812
813 #define BLOCK_PROBE_BUF_SIZE 512
814
815 +typedef int BackupDumpFunc(void *opaque, BlockBackend *be,
816 + int64_t sector_num, int n_sectors, unsigned char *buf);
817 +
818 enum BdrvTrackedRequestType {
819 BDRV_TRACKED_READ,
820 BDRV_TRACKED_WRITE,
821 @@ -877,6 +880,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
822 BlockdevOnError on_source_error,
823 BlockdevOnError on_target_error,
824 int creation_flags,
825 + BackupDumpFunc *dump_cb,
826 BlockCompletionFunc *cb, void *opaque,
827 int pause_count,
828 BlockJobTxn *txn, Error **errp);
829 diff --git a/vma-reader.c b/vma-reader.c
830 new file mode 100644
831 index 0000000000..2000889bd3
832 --- /dev/null
833 +++ b/vma-reader.c
834 @@ -0,0 +1,857 @@
835 +/*
836 + * VMA: Virtual Machine Archive
837 + *
838 + * Copyright (C) 2012 Proxmox Server Solutions
839 + *
840 + * Authors:
841 + * Dietmar Maurer (dietmar@proxmox.com)
842 + *
843 + * This work is licensed under the terms of the GNU GPL, version 2 or later.
844 + * See the COPYING file in the top-level directory.
845 + *
846 + */
847 +
848 +#include "qemu/osdep.h"
849 +#include <glib.h>
850 +#include <uuid/uuid.h>
851 +
852 +#include "qemu-common.h"
853 +#include "qemu/timer.h"
854 +#include "qemu/ratelimit.h"
855 +#include "vma.h"
856 +#include "block/block.h"
857 +#include "sysemu/block-backend.h"
858 +
859 +static unsigned char zero_vma_block[VMA_BLOCK_SIZE];
860 +
861 +typedef struct VmaRestoreState {
862 + BlockBackend *target;
863 + bool write_zeroes;
864 + unsigned long *bitmap;
865 + int bitmap_size;
866 +} VmaRestoreState;
867 +
868 +struct VmaReader {
869 + int fd;
870 + GChecksum *md5csum;
871 + GHashTable *blob_hash;
872 + unsigned char *head_data;
873 + VmaDeviceInfo devinfo[256];
874 + VmaRestoreState rstate[256];
875 + GList *cdata_list;
876 + guint8 vmstate_stream;
877 + uint32_t vmstate_clusters;
878 + /* to show restore percentage if run with -v */
879 + time_t start_time;
880 + int64_t cluster_count;
881 + int64_t clusters_read;
882 + int64_t zero_cluster_data;
883 + int64_t partial_zero_cluster_data;
884 + int clusters_read_per;
885 +};
886 +
887 +static guint
888 +g_int32_hash(gconstpointer v)
889 +{
890 + return *(const uint32_t *)v;
891 +}
892 +
893 +static gboolean
894 +g_int32_equal(gconstpointer v1, gconstpointer v2)
895 +{
896 + return *((const uint32_t *)v1) == *((const uint32_t *)v2);
897 +}
898 +
899 +static int vma_reader_get_bitmap(VmaRestoreState *rstate, int64_t cluster_num)
900 +{
901 + assert(rstate);
902 + assert(rstate->bitmap);
903 +
904 + unsigned long val, idx, bit;
905 +
906 + idx = cluster_num / BITS_PER_LONG;
907 +
908 + assert(rstate->bitmap_size > idx);
909 +
910 + bit = cluster_num % BITS_PER_LONG;
911 + val = rstate->bitmap[idx];
912 +
913 + return !!(val & (1UL << bit));
914 +}
915 +
916 +static void vma_reader_set_bitmap(VmaRestoreState *rstate, int64_t cluster_num,
917 + int dirty)
918 +{
919 + assert(rstate);
920 + assert(rstate->bitmap);
921 +
922 + unsigned long val, idx, bit;
923 +
924 + idx = cluster_num / BITS_PER_LONG;
925 +
926 + assert(rstate->bitmap_size > idx);
927 +
928 + bit = cluster_num % BITS_PER_LONG;
929 + val = rstate->bitmap[idx];
930 + if (dirty) {
931 + if (!(val & (1UL << bit))) {
932 + val |= 1UL << bit;
933 + }
934 + } else {
935 + if (val & (1UL << bit)) {
936 + val &= ~(1UL << bit);
937 + }
938 + }
939 + rstate->bitmap[idx] = val;
940 +}
941 +
942 +typedef struct VmaBlob {
943 + uint32_t start;
944 + uint32_t len;
945 + void *data;
946 +} VmaBlob;
947 +
948 +static const VmaBlob *get_header_blob(VmaReader *vmar, uint32_t pos)
949 +{
950 + assert(vmar);
951 + assert(vmar->blob_hash);
952 +
953 + return g_hash_table_lookup(vmar->blob_hash, &pos);
954 +}
955 +
956 +static const char *get_header_str(VmaReader *vmar, uint32_t pos)
957 +{
958 + const VmaBlob *blob = get_header_blob(vmar, pos);
959 + if (!blob) {
960 + return NULL;
961 + }
962 + const char *res = (char *)blob->data;
963 + if (res[blob->len-1] != '\0') {
964 + return NULL;
965 + }
966 + return res;
967 +}
968 +
969 +static ssize_t
970 +safe_read(int fd, unsigned char *buf, size_t count)
971 +{
972 + ssize_t n;
973 +
974 + do {
975 + n = read(fd, buf, count);
976 + } while (n < 0 && errno == EINTR);
977 +
978 + return n;
979 +}
980 +
981 +static ssize_t
982 +full_read(int fd, unsigned char *buf, size_t len)
983 +{
984 + ssize_t n;
985 + size_t total;
986 +
987 + total = 0;
988 +
989 + while (len > 0) {
990 + n = safe_read(fd, buf, len);
991 +
992 + if (n == 0) {
993 + return total;
994 + }
995 +
996 + if (n <= 0) {
997 + break;
998 + }
999 +
1000 + buf += n;
1001 + total += n;
1002 + len -= n;
1003 + }
1004 +
1005 + if (len) {
1006 + return -1;
1007 + }
1008 +
1009 + return total;
1010 +}
1011 +
1012 +void vma_reader_destroy(VmaReader *vmar)
1013 +{
1014 + assert(vmar);
1015 +
1016 + if (vmar->fd >= 0) {
1017 + close(vmar->fd);
1018 + }
1019 +
1020 + if (vmar->cdata_list) {
1021 + g_list_free(vmar->cdata_list);
1022 + }
1023 +
1024 + int i;
1025 + for (i = 1; i < 256; i++) {
1026 + if (vmar->rstate[i].bitmap) {
1027 + g_free(vmar->rstate[i].bitmap);
1028 + }
1029 + }
1030 +
1031 + if (vmar->md5csum) {
1032 + g_checksum_free(vmar->md5csum);
1033 + }
1034 +
1035 + if (vmar->blob_hash) {
1036 + g_hash_table_destroy(vmar->blob_hash);
1037 + }
1038 +
1039 + if (vmar->head_data) {
1040 + g_free(vmar->head_data);
1041 + }
1042 +
1043 + g_free(vmar);
1044 +
1045 +};
1046 +
1047 +static int vma_reader_read_head(VmaReader *vmar, Error **errp)
1048 +{
1049 + assert(vmar);
1050 + assert(errp);
1051 + assert(*errp == NULL);
1052 +
1053 + unsigned char md5sum[16];
1054 + int i;
1055 + int ret = 0;
1056 +
1057 + vmar->head_data = g_malloc(sizeof(VmaHeader));
1058 +
1059 + if (full_read(vmar->fd, vmar->head_data, sizeof(VmaHeader)) !=
1060 + sizeof(VmaHeader)) {
1061 + error_setg(errp, "can't read vma header - %s",
1062 + errno ? g_strerror(errno) : "got EOF");
1063 + return -1;
1064 + }
1065 +
1066 + VmaHeader *h = (VmaHeader *)vmar->head_data;
1067 +
1068 + if (h->magic != VMA_MAGIC) {
1069 + error_setg(errp, "not a vma file - wrong magic number");
1070 + return -1;
1071 + }
1072 +
1073 + uint32_t header_size = GUINT32_FROM_BE(h->header_size);
1074 + int need = header_size - sizeof(VmaHeader);
1075 + if (need <= 0) {
1076 + error_setg(errp, "wrong vma header size %d", header_size);
1077 + return -1;
1078 + }
1079 +
1080 + vmar->head_data = g_realloc(vmar->head_data, header_size);
1081 + h = (VmaHeader *)vmar->head_data;
1082 +
1083 + if (full_read(vmar->fd, vmar->head_data + sizeof(VmaHeader), need) !=
1084 + need) {
1085 + error_setg(errp, "can't read vma header data - %s",
1086 + errno ? g_strerror(errno) : "got EOF");
1087 + return -1;
1088 + }
1089 +
1090 + memcpy(md5sum, h->md5sum, 16);
1091 + memset(h->md5sum, 0, 16);
1092 +
1093 + g_checksum_reset(vmar->md5csum);
1094 + g_checksum_update(vmar->md5csum, vmar->head_data, header_size);
1095 + gsize csize = 16;
1096 + g_checksum_get_digest(vmar->md5csum, (guint8 *)(h->md5sum), &csize);
1097 +
1098 + if (memcmp(md5sum, h->md5sum, 16) != 0) {
1099 + error_setg(errp, "wrong vma header chechsum");
1100 + return -1;
1101 + }
1102 +
1103 + /* we can modify header data after checksum verify */
1104 + h->header_size = header_size;
1105 +
1106 + h->version = GUINT32_FROM_BE(h->version);
1107 + if (h->version != 1) {
1108 + error_setg(errp, "wrong vma version %d", h->version);
1109 + return -1;
1110 + }
1111 +
1112 + h->ctime = GUINT64_FROM_BE(h->ctime);
1113 + h->blob_buffer_offset = GUINT32_FROM_BE(h->blob_buffer_offset);
1114 + h->blob_buffer_size = GUINT32_FROM_BE(h->blob_buffer_size);
1115 +
1116 + uint32_t bstart = h->blob_buffer_offset + 1;
1117 + uint32_t bend = h->blob_buffer_offset + h->blob_buffer_size;
1118 +
1119 + if (bstart <= sizeof(VmaHeader)) {
1120 + error_setg(errp, "wrong vma blob buffer offset %d",
1121 + h->blob_buffer_offset);
1122 + return -1;
1123 + }
1124 +
1125 + if (bend > header_size) {
1126 + error_setg(errp, "wrong vma blob buffer size %d/%d",
1127 + h->blob_buffer_offset, h->blob_buffer_size);
1128 + return -1;
1129 + }
1130 +
1131 + while ((bstart + 2) <= bend) {
1132 + uint32_t size = vmar->head_data[bstart] +
1133 + (vmar->head_data[bstart+1] << 8);
1134 + if ((bstart + size + 2) <= bend) {
1135 + VmaBlob *blob = g_new0(VmaBlob, 1);
1136 + blob->start = bstart - h->blob_buffer_offset;
1137 + blob->len = size;
1138 + blob->data = vmar->head_data + bstart + 2;
1139 + g_hash_table_insert(vmar->blob_hash, &blob->start, blob);
1140 + }
1141 + bstart += size + 2;
1142 + }
1143 +
1144 +
1145 + int count = 0;
1146 + for (i = 1; i < 256; i++) {
1147 + VmaDeviceInfoHeader *dih = &h->dev_info[i];
1148 + uint32_t devname_ptr = GUINT32_FROM_BE(dih->devname_ptr);
1149 + uint64_t size = GUINT64_FROM_BE(dih->size);
1150 + const char *devname = get_header_str(vmar, devname_ptr);
1151 +
1152 + if (size && devname) {
1153 + count++;
1154 + vmar->devinfo[i].size = size;
1155 + vmar->devinfo[i].devname = devname;
1156 +
1157 + if (strcmp(devname, "vmstate") == 0) {
1158 + vmar->vmstate_stream = i;
1159 + }
1160 + }
1161 + }
1162 +
1163 + for (i = 0; i < VMA_MAX_CONFIGS; i++) {
1164 + uint32_t name_ptr = GUINT32_FROM_BE(h->config_names[i]);
1165 + uint32_t data_ptr = GUINT32_FROM_BE(h->config_data[i]);
1166 +
1167 + if (!(name_ptr && data_ptr)) {
1168 + continue;
1169 + }
1170 + const char *name = get_header_str(vmar, name_ptr);
1171 + const VmaBlob *blob = get_header_blob(vmar, data_ptr);
1172 +
1173 + if (!(name && blob)) {
1174 + error_setg(errp, "vma contains invalid data pointers");
1175 + return -1;
1176 + }
1177 +
1178 + VmaConfigData *cdata = g_new0(VmaConfigData, 1);
1179 + cdata->name = name;
1180 + cdata->data = blob->data;
1181 + cdata->len = blob->len;
1182 +
1183 + vmar->cdata_list = g_list_append(vmar->cdata_list, cdata);
1184 + }
1185 +
1186 + return ret;
1187 +};
1188 +
1189 +VmaReader *vma_reader_create(const char *filename, Error **errp)
1190 +{
1191 + assert(filename);
1192 + assert(errp);
1193 +
1194 + VmaReader *vmar = g_new0(VmaReader, 1);
1195 +
1196 + if (strcmp(filename, "-") == 0) {
1197 + vmar->fd = dup(0);
1198 + } else {
1199 + vmar->fd = open(filename, O_RDONLY);
1200 + }
1201 +
1202 + if (vmar->fd < 0) {
1203 + error_setg(errp, "can't open file %s - %s\n", filename,
1204 + g_strerror(errno));
1205 + goto err;
1206 + }
1207 +
1208 + vmar->md5csum = g_checksum_new(G_CHECKSUM_MD5);
1209 + if (!vmar->md5csum) {
1210 + error_setg(errp, "can't allocate cmsum\n");
1211 + goto err;
1212 + }
1213 +
1214 + vmar->blob_hash = g_hash_table_new_full(g_int32_hash, g_int32_equal,
1215 + NULL, g_free);
1216 +
1217 + if (vma_reader_read_head(vmar, errp) < 0) {
1218 + goto err;
1219 + }
1220 +
1221 + return vmar;
1222 +
1223 +err:
1224 + if (vmar) {
1225 + vma_reader_destroy(vmar);
1226 + }
1227 +
1228 + return NULL;
1229 +}
1230 +
1231 +VmaHeader *vma_reader_get_header(VmaReader *vmar)
1232 +{
1233 + assert(vmar);
1234 + assert(vmar->head_data);
1235 +
1236 + return (VmaHeader *)(vmar->head_data);
1237 +}
1238 +
1239 +GList *vma_reader_get_config_data(VmaReader *vmar)
1240 +{
1241 + assert(vmar);
1242 + assert(vmar->head_data);
1243 +
1244 + return vmar->cdata_list;
1245 +}
1246 +
1247 +VmaDeviceInfo *vma_reader_get_device_info(VmaReader *vmar, guint8 dev_id)
1248 +{
1249 + assert(vmar);
1250 + assert(dev_id);
1251 +
1252 + if (vmar->devinfo[dev_id].size && vmar->devinfo[dev_id].devname) {
1253 + return &vmar->devinfo[dev_id];
1254 + }
1255 +
1256 + return NULL;
1257 +}
1258 +
1259 +static void allocate_rstate(VmaReader *vmar, guint8 dev_id,
1260 + BlockBackend *target, bool write_zeroes)
1261 +{
1262 + assert(vmar);
1263 + assert(dev_id);
1264 +
1265 + vmar->rstate[dev_id].target = target;
1266 + vmar->rstate[dev_id].write_zeroes = write_zeroes;
1267 +
1268 + int64_t size = vmar->devinfo[dev_id].size;
1269 +
1270 + int64_t bitmap_size = (size/BDRV_SECTOR_SIZE) +
1271 + (VMA_CLUSTER_SIZE/BDRV_SECTOR_SIZE) * BITS_PER_LONG - 1;
1272 + bitmap_size /= (VMA_CLUSTER_SIZE/BDRV_SECTOR_SIZE) * BITS_PER_LONG;
1273 +
1274 + vmar->rstate[dev_id].bitmap_size = bitmap_size;
1275 + vmar->rstate[dev_id].bitmap = g_new0(unsigned long, bitmap_size);
1276 +
1277 + vmar->cluster_count += size/VMA_CLUSTER_SIZE;
1278 +}
1279 +
1280 +int vma_reader_register_bs(VmaReader *vmar, guint8 dev_id, BlockBackend *target,
1281 + bool write_zeroes, Error **errp)
1282 +{
1283 + assert(vmar);
1284 + assert(target != NULL);
1285 + assert(dev_id);
1286 + assert(vmar->rstate[dev_id].target == NULL);
1287 +
1288 + int64_t size = blk_getlength(target);
1289 + int64_t size_diff = size - vmar->devinfo[dev_id].size;
1290 +
1291 + /* storage types can have different size restrictions, so it
1292 + * is not always possible to create an image with exact size.
1293 + * So we tolerate a size difference up to 4MB.
1294 + */
1295 + if ((size_diff < 0) || (size_diff > 4*1024*1024)) {
1296 + error_setg(errp, "vma_reader_register_bs for stream %s failed - "
1297 + "unexpected size %zd != %zd", vmar->devinfo[dev_id].devname,
1298 + size, vmar->devinfo[dev_id].size);
1299 + return -1;
1300 + }
1301 +
1302 + allocate_rstate(vmar, dev_id, target, write_zeroes);
1303 +
1304 + return 0;
1305 +}
1306 +
1307 +static ssize_t safe_write(int fd, void *buf, size_t count)
1308 +{
1309 + ssize_t n;
1310 +
1311 + do {
1312 + n = write(fd, buf, count);
1313 + } while (n < 0 && errno == EINTR);
1314 +
1315 + return n;
1316 +}
1317 +
1318 +static size_t full_write(int fd, void *buf, size_t len)
1319 +{
1320 + ssize_t n;
1321 + size_t total;
1322 +
1323 + total = 0;
1324 +
1325 + while (len > 0) {
1326 + n = safe_write(fd, buf, len);
1327 + if (n < 0) {
1328 + return n;
1329 + }
1330 + buf += n;
1331 + total += n;
1332 + len -= n;
1333 + }
1334 +
1335 + if (len) {
1336 + /* incomplete write ? */
1337 + return -1;
1338 + }
1339 +
1340 + return total;
1341 +}
1342 +
1343 +static int restore_write_data(VmaReader *vmar, guint8 dev_id,
1344 + BlockBackend *target, int vmstate_fd,
1345 + unsigned char *buf, int64_t sector_num,
1346 + int nb_sectors, Error **errp)
1347 +{
1348 + assert(vmar);
1349 +
1350 + if (dev_id == vmar->vmstate_stream) {
1351 + if (vmstate_fd >= 0) {
1352 + int len = nb_sectors * BDRV_SECTOR_SIZE;
1353 + int res = full_write(vmstate_fd, buf, len);
1354 + if (res < 0) {
1355 + error_setg(errp, "write vmstate failed %d", res);
1356 + return -1;
1357 + }
1358 + }
1359 + } else {
1360 + int res = blk_pwrite(target, sector_num * BDRV_SECTOR_SIZE, buf, nb_sectors * BDRV_SECTOR_SIZE, 0);
1361 + if (res < 0) {
1362 + error_setg(errp, "blk_pwrite to %s failed (%d)",
1363 + bdrv_get_device_name(blk_bs(target)), res);
1364 + return -1;
1365 + }
1366 + }
1367 + return 0;
1368 +}
1369 +
1370 +static int restore_extent(VmaReader *vmar, unsigned char *buf,
1371 + int extent_size, int vmstate_fd,
1372 + bool verbose, bool verify, Error **errp)
1373 +{
1374 + assert(vmar);
1375 + assert(buf);
1376 +
1377 + VmaExtentHeader *ehead = (VmaExtentHeader *)buf;
1378 + int start = VMA_EXTENT_HEADER_SIZE;
1379 + int i;
1380 +
1381 + for (i = 0; i < VMA_BLOCKS_PER_EXTENT; i++) {
1382 + uint64_t block_info = GUINT64_FROM_BE(ehead->blockinfo[i]);
1383 + uint64_t cluster_num = block_info & 0xffffffff;
1384 + uint8_t dev_id = (block_info >> 32) & 0xff;
1385 + uint16_t mask = block_info >> (32+16);
1386 + int64_t max_sector;
1387 +
1388 + if (!dev_id) {
1389 + continue;
1390 + }
1391 +
1392 + VmaRestoreState *rstate = &vmar->rstate[dev_id];
1393 + BlockBackend *target = NULL;
1394 +
1395 + if (dev_id != vmar->vmstate_stream) {
1396 + target = rstate->target;
1397 + if (!verify && !target) {
1398 + error_setg(errp, "got wrong dev id %d", dev_id);
1399 + return -1;
1400 + }
1401 +
1402 + if (vma_reader_get_bitmap(rstate, cluster_num)) {
1403 + error_setg(errp, "found duplicated cluster %zd for stream %s",
1404 + cluster_num, vmar->devinfo[dev_id].devname);
1405 + return -1;
1406 + }
1407 + vma_reader_set_bitmap(rstate, cluster_num, 1);
1408 +
1409 + max_sector = vmar->devinfo[dev_id].size/BDRV_SECTOR_SIZE;
1410 + } else {
1411 + max_sector = G_MAXINT64;
1412 + if (cluster_num != vmar->vmstate_clusters) {
1413 + error_setg(errp, "found out of order vmstate data");
1414 + return -1;
1415 + }
1416 + vmar->vmstate_clusters++;
1417 + }
1418 +
1419 + vmar->clusters_read++;
1420 +
1421 + if (verbose) {
1422 + time_t duration = time(NULL) - vmar->start_time;
1423 + int percent = (vmar->clusters_read*100)/vmar->cluster_count;
1424 + if (percent != vmar->clusters_read_per) {
1425 + printf("progress %d%% (read %zd bytes, duration %zd sec)\n",
1426 + percent, vmar->clusters_read*VMA_CLUSTER_SIZE,
1427 + duration);
1428 + fflush(stdout);
1429 + vmar->clusters_read_per = percent;
1430 + }
1431 + }
1432 +
1433 + /* try to write whole clusters to speedup restore */
1434 + if (mask == 0xffff) {
1435 + if ((start + VMA_CLUSTER_SIZE) > extent_size) {
1436 + error_setg(errp, "short vma extent - too many blocks");
1437 + return -1;
1438 + }
1439 + int64_t sector_num = (cluster_num * VMA_CLUSTER_SIZE) /
1440 + BDRV_SECTOR_SIZE;
1441 + int64_t end_sector = sector_num +
1442 + VMA_CLUSTER_SIZE/BDRV_SECTOR_SIZE;
1443 +
1444 + if (end_sector > max_sector) {
1445 + end_sector = max_sector;
1446 + }
1447 +
1448 + if (end_sector <= sector_num) {
1449 + error_setg(errp, "got wrong block address - write bejond end");
1450 + return -1;
1451 + }
1452 +
1453 + if (!verify) {
1454 + int nb_sectors = end_sector - sector_num;
1455 + if (restore_write_data(vmar, dev_id, target, vmstate_fd,
1456 + buf + start, sector_num, nb_sectors,
1457 + errp) < 0) {
1458 + return -1;
1459 + }
1460 + }
1461 +
1462 + start += VMA_CLUSTER_SIZE;
1463 + } else {
1464 + int j;
1465 + int bit = 1;
1466 +
1467 + for (j = 0; j < 16; j++) {
1468 + int64_t sector_num = (cluster_num*VMA_CLUSTER_SIZE +
1469 + j*VMA_BLOCK_SIZE)/BDRV_SECTOR_SIZE;
1470 +
1471 + int64_t end_sector = sector_num +
1472 + VMA_BLOCK_SIZE/BDRV_SECTOR_SIZE;
1473 + if (end_sector > max_sector) {
1474 + end_sector = max_sector;
1475 + }
1476 +
1477 + if (mask & bit) {
1478 + if ((start + VMA_BLOCK_SIZE) > extent_size) {
1479 + error_setg(errp, "short vma extent - too many blocks");
1480 + return -1;
1481 + }
1482 +
1483 + if (end_sector <= sector_num) {
1484 + error_setg(errp, "got wrong block address - "
1485 + "write bejond end");
1486 + return -1;
1487 + }
1488 +
1489 + if (!verify) {
1490 + int nb_sectors = end_sector - sector_num;
1491 + if (restore_write_data(vmar, dev_id, target, vmstate_fd,
1492 + buf + start, sector_num,
1493 + nb_sectors, errp) < 0) {
1494 + return -1;
1495 + }
1496 + }
1497 +
1498 + start += VMA_BLOCK_SIZE;
1499 +
1500 + } else {
1501 +
1502 +
1503 + if (end_sector > sector_num) {
1504 + /* Todo: use bdrv_co_write_zeroes (but that need to
1505 + * be run inside coroutine?)
1506 + */
1507 + int nb_sectors = end_sector - sector_num;
1508 + int zero_size = BDRV_SECTOR_SIZE*nb_sectors;
1509 + vmar->zero_cluster_data += zero_size;
1510 + if (mask != 0) {
1511 + vmar->partial_zero_cluster_data += zero_size;
1512 + }
1513 +
1514 + if (rstate->write_zeroes && !verify) {
1515 + if (restore_write_data(vmar, dev_id, target, vmstate_fd,
1516 + zero_vma_block, sector_num,
1517 + nb_sectors, errp) < 0) {
1518 + return -1;
1519 + }
1520 + }
1521 + }
1522 + }
1523 +
1524 + bit = bit << 1;
1525 + }
1526 + }
1527 + }
1528 +
1529 + if (start != extent_size) {
1530 + error_setg(errp, "vma extent error - missing blocks");
1531 + return -1;
1532 + }
1533 +
1534 + return 0;
1535 +}
1536 +
1537 +static int vma_reader_restore_full(VmaReader *vmar, int vmstate_fd,
1538 + bool verbose, bool verify,
1539 + Error **errp)
1540 +{
1541 + assert(vmar);
1542 + assert(vmar->head_data);
1543 +
1544 + int ret = 0;
1545 + unsigned char buf[VMA_MAX_EXTENT_SIZE];
1546 + int buf_pos = 0;
1547 + unsigned char md5sum[16];
1548 + VmaHeader *h = (VmaHeader *)vmar->head_data;
1549 +
1550 + vmar->start_time = time(NULL);
1551 +
1552 + while (1) {
1553 + int bytes = full_read(vmar->fd, buf + buf_pos, sizeof(buf) - buf_pos);
1554 + if (bytes < 0) {
1555 + error_setg(errp, "read failed - %s", g_strerror(errno));
1556 + return -1;
1557 + }
1558 +
1559 + buf_pos += bytes;
1560 +
1561 + if (!buf_pos) {
1562 + break; /* EOF */
1563 + }
1564 +
1565 + if (buf_pos < VMA_EXTENT_HEADER_SIZE) {
1566 + error_setg(errp, "read short extent (%d bytes)", buf_pos);
1567 + return -1;
1568 + }
1569 +
1570 + VmaExtentHeader *ehead = (VmaExtentHeader *)buf;
1571 +
1572 + /* extract md5sum */
1573 + memcpy(md5sum, ehead->md5sum, sizeof(ehead->md5sum));
1574 + memset(ehead->md5sum, 0, sizeof(ehead->md5sum));
1575 +
1576 + g_checksum_reset(vmar->md5csum);
1577 + g_checksum_update(vmar->md5csum, buf, VMA_EXTENT_HEADER_SIZE);
1578 + gsize csize = 16;
1579 + g_checksum_get_digest(vmar->md5csum, ehead->md5sum, &csize);
1580 +
1581 + if (memcmp(md5sum, ehead->md5sum, 16) != 0) {
1582 + error_setg(errp, "wrong vma extent header chechsum");
1583 + return -1;
1584 + }
1585 +
1586 + if (memcmp(h->uuid, ehead->uuid, sizeof(ehead->uuid)) != 0) {
1587 + error_setg(errp, "wrong vma extent uuid");
1588 + return -1;
1589 + }
1590 +
1591 + if (ehead->magic != VMA_EXTENT_MAGIC || ehead->reserved1 != 0) {
1592 + error_setg(errp, "wrong vma extent header magic");
1593 + return -1;
1594 + }
1595 +
1596 + int block_count = GUINT16_FROM_BE(ehead->block_count);
1597 + int extent_size = VMA_EXTENT_HEADER_SIZE + block_count*VMA_BLOCK_SIZE;
1598 +
1599 + if (buf_pos < extent_size) {
1600 + error_setg(errp, "short vma extent (%d < %d)", buf_pos,
1601 + extent_size);
1602 + return -1;
1603 + }
1604 +
1605 + if (restore_extent(vmar, buf, extent_size, vmstate_fd, verbose,
1606 + verify, errp) < 0) {
1607 + return -1;
1608 + }
1609 +
1610 + if (buf_pos > extent_size) {
1611 + memmove(buf, buf + extent_size, buf_pos - extent_size);
1612 + buf_pos = buf_pos - extent_size;
1613 + } else {
1614 + buf_pos = 0;
1615 + }
1616 + }
1617 +
1618 + bdrv_drain_all();
1619 +
1620 + int i;
1621 + for (i = 1; i < 256; i++) {
1622 + VmaRestoreState *rstate = &vmar->rstate[i];
1623 + if (!rstate->target) {
1624 + continue;
1625 + }
1626 +
1627 + if (blk_flush(rstate->target) < 0) {
1628 + error_setg(errp, "vma blk_flush %s failed",
1629 + vmar->devinfo[i].devname);
1630 + return -1;
1631 + }
1632 +
1633 + if (vmar->devinfo[i].size &&
1634 + (strcmp(vmar->devinfo[i].devname, "vmstate") != 0)) {
1635 + assert(rstate->bitmap);
1636 +
1637 + int64_t cluster_num, end;
1638 +
1639 + end = (vmar->devinfo[i].size + VMA_CLUSTER_SIZE - 1) /
1640 + VMA_CLUSTER_SIZE;
1641 +
1642 + for (cluster_num = 0; cluster_num < end; cluster_num++) {
1643 + if (!vma_reader_get_bitmap(rstate, cluster_num)) {
1644 + error_setg(errp, "detected missing cluster %zd "
1645 + "for stream %s", cluster_num,
1646 + vmar->devinfo[i].devname);
1647 + return -1;
1648 + }
1649 + }
1650 + }
1651 + }
1652 +
1653 + if (verbose) {
1654 + if (vmar->clusters_read) {
1655 + printf("total bytes read %zd, sparse bytes %zd (%.3g%%)\n",
1656 + vmar->clusters_read*VMA_CLUSTER_SIZE,
1657 + vmar->zero_cluster_data,
1658 + (double)(100.0*vmar->zero_cluster_data)/
1659 + (vmar->clusters_read*VMA_CLUSTER_SIZE));
1660 +
1661 + int64_t datasize = vmar->clusters_read*VMA_CLUSTER_SIZE-vmar->zero_cluster_data;
1662 + if (datasize) { // this does not make sense for empty files
1663 + printf("space reduction due to 4K zero blocks %.3g%%\n",
1664 + (double)(100.0*vmar->partial_zero_cluster_data) / datasize);
1665 + }
1666 + } else {
1667 + printf("vma archive contains no image data\n");
1668 + }
1669 + }
1670 + return ret;
1671 +}
1672 +
1673 +int vma_reader_restore(VmaReader *vmar, int vmstate_fd, bool verbose,
1674 + Error **errp)
1675 +{
1676 + return vma_reader_restore_full(vmar, vmstate_fd, verbose, false, errp);
1677 +}
1678 +
1679 +int vma_reader_verify(VmaReader *vmar, bool verbose, Error **errp)
1680 +{
1681 + guint8 dev_id;
1682 +
1683 + for (dev_id = 1; dev_id < 255; dev_id++) {
1684 + if (vma_reader_get_device_info(vmar, dev_id)) {
1685 + allocate_rstate(vmar, dev_id, NULL, false);
1686 + }
1687 + }
1688 +
1689 + return vma_reader_restore_full(vmar, -1, verbose, true, errp);
1690 +}
1691 +
1692 diff --git a/vma-writer.c b/vma-writer.c
1693 new file mode 100644
1694 index 0000000000..9001cbdd2b
1695 --- /dev/null
1696 +++ b/vma-writer.c
1697 @@ -0,0 +1,771 @@
1698 +/*
1699 + * VMA: Virtual Machine Archive
1700 + *
1701 + * Copyright (C) 2012 Proxmox Server Solutions
1702 + *
1703 + * Authors:
1704 + * Dietmar Maurer (dietmar@proxmox.com)
1705 + *
1706 + * This work is licensed under the terms of the GNU GPL, version 2 or later.
1707 + * See the COPYING file in the top-level directory.
1708 + *
1709 + */
1710 +
1711 +#include "qemu/osdep.h"
1712 +#include <glib.h>
1713 +#include <uuid/uuid.h>
1714 +
1715 +#include "vma.h"
1716 +#include "block/block.h"
1717 +#include "monitor/monitor.h"
1718 +#include "qemu/main-loop.h"
1719 +#include "qemu/coroutine.h"
1720 +#include "qemu/cutils.h"
1721 +
1722 +#define DEBUG_VMA 0
1723 +
1724 +#define DPRINTF(fmt, ...)\
1725 + do { if (DEBUG_VMA) { printf("vma: " fmt, ## __VA_ARGS__); } } while (0)
1726 +
1727 +#define WRITE_BUFFERS 5
1728 +#define HEADER_CLUSTERS 8
1729 +#define HEADERBUF_SIZE (VMA_CLUSTER_SIZE*HEADER_CLUSTERS)
1730 +
1731 +struct VmaWriter {
1732 + int fd;
1733 + FILE *cmd;
1734 + int status;
1735 + char errmsg[8192];
1736 + uuid_t uuid;
1737 + bool header_written;
1738 + bool closed;
1739 +
1740 + /* we always write extents */
1741 + unsigned char *outbuf;
1742 + int outbuf_pos; /* in bytes */
1743 + int outbuf_count; /* in VMA_BLOCKS */
1744 + uint64_t outbuf_block_info[VMA_BLOCKS_PER_EXTENT];
1745 +
1746 + unsigned char *headerbuf;
1747 +
1748 + GChecksum *md5csum;
1749 + CoMutex flush_lock;
1750 + Coroutine *co_writer;
1751 +
1752 + /* drive informations */
1753 + VmaStreamInfo stream_info[256];
1754 + guint stream_count;
1755 +
1756 + guint8 vmstate_stream;
1757 + uint32_t vmstate_clusters;
1758 +
1759 + /* header blob table */
1760 + char *header_blob_table;
1761 + uint32_t header_blob_table_size;
1762 + uint32_t header_blob_table_pos;
1763 +
1764 + /* store for config blobs */
1765 + uint32_t config_names[VMA_MAX_CONFIGS]; /* offset into blob_buffer table */
1766 + uint32_t config_data[VMA_MAX_CONFIGS]; /* offset into blob_buffer table */
1767 + uint32_t config_count;
1768 +};
1769 +
1770 +void vma_writer_set_error(VmaWriter *vmaw, const char *fmt, ...)
1771 +{
1772 + va_list ap;
1773 +
1774 + if (vmaw->status < 0) {
1775 + return;
1776 + }
1777 +
1778 + vmaw->status = -1;
1779 +
1780 + va_start(ap, fmt);
1781 + g_vsnprintf(vmaw->errmsg, sizeof(vmaw->errmsg), fmt, ap);
1782 + va_end(ap);
1783 +
1784 + DPRINTF("vma_writer_set_error: %s\n", vmaw->errmsg);
1785 +}
1786 +
1787 +static uint32_t allocate_header_blob(VmaWriter *vmaw, const char *data,
1788 + size_t len)
1789 +{
1790 + if (len > 65535) {
1791 + return 0;
1792 + }
1793 +
1794 + if (!vmaw->header_blob_table ||
1795 + (vmaw->header_blob_table_size <
1796 + (vmaw->header_blob_table_pos + len + 2))) {
1797 + int newsize = vmaw->header_blob_table_size + ((len + 2 + 511)/512)*512;
1798 +
1799 + vmaw->header_blob_table = g_realloc(vmaw->header_blob_table, newsize);
1800 + memset(vmaw->header_blob_table + vmaw->header_blob_table_size,
1801 + 0, newsize - vmaw->header_blob_table_size);
1802 + vmaw->header_blob_table_size = newsize;
1803 + }
1804 +
1805 + uint32_t cpos = vmaw->header_blob_table_pos;
1806 + vmaw->header_blob_table[cpos] = len & 255;
1807 + vmaw->header_blob_table[cpos+1] = (len >> 8) & 255;
1808 + memcpy(vmaw->header_blob_table + cpos + 2, data, len);
1809 + vmaw->header_blob_table_pos += len + 2;
1810 + return cpos;
1811 +}
1812 +
1813 +static uint32_t allocate_header_string(VmaWriter *vmaw, const char *str)
1814 +{
1815 + assert(vmaw);
1816 +
1817 + size_t len = strlen(str) + 1;
1818 +
1819 + return allocate_header_blob(vmaw, str, len);
1820 +}
1821 +
1822 +int vma_writer_add_config(VmaWriter *vmaw, const char *name, gpointer data,
1823 + gsize len)
1824 +{
1825 + assert(vmaw);
1826 + assert(!vmaw->header_written);
1827 + assert(vmaw->config_count < VMA_MAX_CONFIGS);
1828 + assert(name);
1829 + assert(data);
1830 +
1831 + gchar *basename = g_path_get_basename(name);
1832 + uint32_t name_ptr = allocate_header_string(vmaw, basename);
1833 + g_free(basename);
1834 +
1835 + if (!name_ptr) {
1836 + return -1;
1837 + }
1838 +
1839 + uint32_t data_ptr = allocate_header_blob(vmaw, data, len);
1840 + if (!data_ptr) {
1841 + return -1;
1842 + }
1843 +
1844 + vmaw->config_names[vmaw->config_count] = name_ptr;
1845 + vmaw->config_data[vmaw->config_count] = data_ptr;
1846 +
1847 + vmaw->config_count++;
1848 +
1849 + return 0;
1850 +}
1851 +
1852 +int vma_writer_register_stream(VmaWriter *vmaw, const char *devname,
1853 + size_t size)
1854 +{
1855 + assert(vmaw);
1856 + assert(devname);
1857 + assert(!vmaw->status);
1858 +
1859 + if (vmaw->header_written) {
1860 + vma_writer_set_error(vmaw, "vma_writer_register_stream: header "
1861 + "already written");
1862 + return -1;
1863 + }
1864 +
1865 + guint n = vmaw->stream_count + 1;
1866 +
1867 + /* we can have dev_ids form 1 to 255 (0 reserved)
1868 + * 255(-1) reseverd for safety
1869 + */
1870 + if (n > 254) {
1871 + vma_writer_set_error(vmaw, "vma_writer_register_stream: "
1872 + "too many drives");
1873 + return -1;
1874 + }
1875 +
1876 + if (size <= 0) {
1877 + vma_writer_set_error(vmaw, "vma_writer_register_stream: "
1878 + "got strange size %zd", size);
1879 + return -1;
1880 + }
1881 +
1882 + DPRINTF("vma_writer_register_stream %s %zu %d\n", devname, size, n);
1883 +
1884 + vmaw->stream_info[n].devname = g_strdup(devname);
1885 + vmaw->stream_info[n].size = size;
1886 +
1887 + vmaw->stream_info[n].cluster_count = (size + VMA_CLUSTER_SIZE - 1) /
1888 + VMA_CLUSTER_SIZE;
1889 +
1890 + vmaw->stream_count = n;
1891 +
1892 + if (strcmp(devname, "vmstate") == 0) {
1893 + vmaw->vmstate_stream = n;
1894 + }
1895 +
1896 + return n;
1897 +}
1898 +
1899 +static void vma_co_continue_write(void *opaque)
1900 +{
1901 + VmaWriter *vmaw = opaque;
1902 +
1903 + DPRINTF("vma_co_continue_write\n");
1904 + qemu_coroutine_enter(vmaw->co_writer);
1905 +}
1906 +
1907 +static ssize_t coroutine_fn
1908 +vma_queue_write(VmaWriter *vmaw, const void *buf, size_t bytes)
1909 +{
1910 + DPRINTF("vma_queue_write enter %zd\n", bytes);
1911 +
1912 + assert(vmaw);
1913 + assert(buf);
1914 + assert(bytes <= VMA_MAX_EXTENT_SIZE);
1915 +
1916 + size_t done = 0;
1917 + ssize_t ret;
1918 +
1919 + assert(vmaw->co_writer == NULL);
1920 +
1921 + vmaw->co_writer = qemu_coroutine_self();
1922 +
1923 + while (done < bytes) {
1924 + aio_set_fd_handler(qemu_get_aio_context(), vmaw->fd, false, NULL, vma_co_continue_write, NULL, vmaw);
1925 + qemu_coroutine_yield();
1926 + aio_set_fd_handler(qemu_get_aio_context(), vmaw->fd, false, NULL, NULL, NULL, NULL);
1927 + if (vmaw->status < 0) {
1928 + DPRINTF("vma_queue_write detected canceled backup\n");
1929 + done = -1;
1930 + break;
1931 + }
1932 + ret = write(vmaw->fd, buf + done, bytes - done);
1933 + if (ret > 0) {
1934 + done += ret;
1935 + DPRINTF("vma_queue_write written %zd %zd\n", done, ret);
1936 + } else if (ret < 0) {
1937 + if (errno == EAGAIN || errno == EWOULDBLOCK) {
1938 + /* try again */
1939 + } else {
1940 + vma_writer_set_error(vmaw, "vma_queue_write: write error - %s",
1941 + g_strerror(errno));
1942 + done = -1; /* always return failure for partial writes */
1943 + break;
1944 + }
1945 + } else if (ret == 0) {
1946 + /* should not happen - simply try again */
1947 + }
1948 + }
1949 +
1950 + vmaw->co_writer = NULL;
1951 +
1952 + return (done == bytes) ? bytes : -1;
1953 +}
1954 +
1955 +VmaWriter *vma_writer_create(const char *filename, uuid_t uuid, Error **errp)
1956 +{
1957 + const char *p;
1958 +
1959 + assert(sizeof(VmaHeader) == (4096 + 8192));
1960 + assert(G_STRUCT_OFFSET(VmaHeader, config_names) == 2044);
1961 + assert(G_STRUCT_OFFSET(VmaHeader, config_data) == 3068);
1962 + assert(G_STRUCT_OFFSET(VmaHeader, dev_info) == 4096);
1963 + assert(sizeof(VmaExtentHeader) == 512);
1964 +
1965 + VmaWriter *vmaw = g_new0(VmaWriter, 1);
1966 + vmaw->fd = -1;
1967 +
1968 + vmaw->md5csum = g_checksum_new(G_CHECKSUM_MD5);
1969 + if (!vmaw->md5csum) {
1970 + error_setg(errp, "can't allocate cmsum\n");
1971 + goto err;
1972 + }
1973 +
1974 + if (strstart(filename, "exec:", &p)) {
1975 + vmaw->cmd = popen(p, "w");
1976 + if (vmaw->cmd == NULL) {
1977 + error_setg(errp, "can't popen command '%s' - %s\n", p,
1978 + g_strerror(errno));
1979 + goto err;
1980 + }
1981 + vmaw->fd = fileno(vmaw->cmd);
1982 +
1983 + /* try to use O_NONBLOCK */
1984 + fcntl(vmaw->fd, F_SETFL, fcntl(vmaw->fd, F_GETFL)|O_NONBLOCK);
1985 +
1986 + } else {
1987 + struct stat st;
1988 + int oflags;
1989 + const char *tmp_id_str;
1990 +
1991 + if ((stat(filename, &st) == 0) && S_ISFIFO(st.st_mode)) {
1992 + oflags = O_NONBLOCK|O_WRONLY;
1993 + vmaw->fd = qemu_open(filename, oflags, 0644);
1994 + } else if (strstart(filename, "/dev/fdset/", &tmp_id_str)) {
1995 + oflags = O_NONBLOCK|O_WRONLY;
1996 + vmaw->fd = qemu_open(filename, oflags, 0644);
1997 + } else if (strstart(filename, "/dev/fdname/", &tmp_id_str)) {
1998 + vmaw->fd = monitor_get_fd(cur_mon, tmp_id_str, errp);
1999 + if (vmaw->fd < 0) {
2000 + goto err;
2001 + }
2002 + /* try to use O_NONBLOCK */
2003 + fcntl(vmaw->fd, F_SETFL, fcntl(vmaw->fd, F_GETFL)|O_NONBLOCK);
2004 + } else {
2005 + oflags = O_NONBLOCK|O_DIRECT|O_WRONLY|O_CREAT|O_EXCL;
2006 + vmaw->fd = qemu_open(filename, oflags, 0644);
2007 + }
2008 +
2009 + if (vmaw->fd < 0) {
2010 + error_setg(errp, "can't open file %s - %s\n", filename,
2011 + g_strerror(errno));
2012 + goto err;
2013 + }
2014 + }
2015 +
2016 + /* we use O_DIRECT, so we need to align IO buffers */
2017 +
2018 + vmaw->outbuf = qemu_memalign(512, VMA_MAX_EXTENT_SIZE);
2019 + vmaw->headerbuf = qemu_memalign(512, HEADERBUF_SIZE);
2020 +
2021 + vmaw->outbuf_count = 0;
2022 + vmaw->outbuf_pos = VMA_EXTENT_HEADER_SIZE;
2023 +
2024 + vmaw->header_blob_table_pos = 1; /* start at pos 1 */
2025 +
2026 + qemu_co_mutex_init(&vmaw->flush_lock);
2027 +
2028 + uuid_copy(vmaw->uuid, uuid);
2029 +
2030 + return vmaw;
2031 +
2032 +err:
2033 + if (vmaw) {
2034 + if (vmaw->cmd) {
2035 + pclose(vmaw->cmd);
2036 + } else if (vmaw->fd >= 0) {
2037 + close(vmaw->fd);
2038 + }
2039 +
2040 + if (vmaw->md5csum) {
2041 + g_checksum_free(vmaw->md5csum);
2042 + }
2043 +
2044 + g_free(vmaw);
2045 + }
2046 +
2047 + return NULL;
2048 +}
2049 +
2050 +static int coroutine_fn vma_write_header(VmaWriter *vmaw)
2051 +{
2052 + assert(vmaw);
2053 + unsigned char *buf = vmaw->headerbuf;
2054 + VmaHeader *head = (VmaHeader *)buf;
2055 +
2056 + int i;
2057 +
2058 + DPRINTF("VMA WRITE HEADER\n");
2059 +
2060 + if (vmaw->status < 0) {
2061 + return vmaw->status;
2062 + }
2063 +
2064 + memset(buf, 0, HEADERBUF_SIZE);
2065 +
2066 + head->magic = VMA_MAGIC;
2067 + head->version = GUINT32_TO_BE(1); /* v1 */
2068 + memcpy(head->uuid, vmaw->uuid, 16);
2069 +
2070 + time_t ctime = time(NULL);
2071 + head->ctime = GUINT64_TO_BE(ctime);
2072 +
2073 + for (i = 0; i < VMA_MAX_CONFIGS; i++) {
2074 + head->config_names[i] = GUINT32_TO_BE(vmaw->config_names[i]);
2075 + head->config_data[i] = GUINT32_TO_BE(vmaw->config_data[i]);
2076 + }
2077 +
2078 + /* 32 bytes per device (12 used currently) = 8192 bytes max */
2079 + for (i = 1; i <= 254; i++) {
2080 + VmaStreamInfo *si = &vmaw->stream_info[i];
2081 + if (si->size) {
2082 + assert(si->devname);
2083 + uint32_t devname_ptr = allocate_header_string(vmaw, si->devname);
2084 + if (!devname_ptr) {
2085 + return -1;
2086 + }
2087 + head->dev_info[i].devname_ptr = GUINT32_TO_BE(devname_ptr);
2088 + head->dev_info[i].size = GUINT64_TO_BE(si->size);
2089 + }
2090 + }
2091 +
2092 + uint32_t header_size = sizeof(VmaHeader) + vmaw->header_blob_table_size;
2093 + head->header_size = GUINT32_TO_BE(header_size);
2094 +
2095 + if (header_size > HEADERBUF_SIZE) {
2096 + return -1; /* just to be sure */
2097 + }
2098 +
2099 + uint32_t blob_buffer_offset = sizeof(VmaHeader);
2100 + memcpy(buf + blob_buffer_offset, vmaw->header_blob_table,
2101 + vmaw->header_blob_table_size);
2102 + head->blob_buffer_offset = GUINT32_TO_BE(blob_buffer_offset);
2103 + head->blob_buffer_size = GUINT32_TO_BE(vmaw->header_blob_table_pos);
2104 +
2105 + g_checksum_reset(vmaw->md5csum);
2106 + g_checksum_update(vmaw->md5csum, (const guchar *)buf, header_size);
2107 + gsize csize = 16;
2108 + g_checksum_get_digest(vmaw->md5csum, (guint8 *)(head->md5sum), &csize);
2109 +
2110 + return vma_queue_write(vmaw, buf, header_size);
2111 +}
2112 +
2113 +static int coroutine_fn vma_writer_flush(VmaWriter *vmaw)
2114 +{
2115 + assert(vmaw);
2116 +
2117 + int ret;
2118 + int i;
2119 +
2120 + if (vmaw->status < 0) {
2121 + return vmaw->status;
2122 + }
2123 +
2124 + if (!vmaw->header_written) {
2125 + vmaw->header_written = true;
2126 + ret = vma_write_header(vmaw);
2127 + if (ret < 0) {
2128 + vma_writer_set_error(vmaw, "vma_writer_flush: write header failed");
2129 + return ret;
2130 + }
2131 + }
2132 +
2133 + DPRINTF("VMA WRITE FLUSH %d %d\n", vmaw->outbuf_count, vmaw->outbuf_pos);
2134 +
2135 +
2136 + VmaExtentHeader *ehead = (VmaExtentHeader *)vmaw->outbuf;
2137 +
2138 + ehead->magic = VMA_EXTENT_MAGIC;
2139 + ehead->reserved1 = 0;
2140 +
2141 + for (i = 0; i < VMA_BLOCKS_PER_EXTENT; i++) {
2142 + ehead->blockinfo[i] = GUINT64_TO_BE(vmaw->outbuf_block_info[i]);
2143 + }
2144 +
2145 + guint16 block_count = (vmaw->outbuf_pos - VMA_EXTENT_HEADER_SIZE) /
2146 + VMA_BLOCK_SIZE;
2147 +
2148 + ehead->block_count = GUINT16_TO_BE(block_count);
2149 +
2150 + memcpy(ehead->uuid, vmaw->uuid, sizeof(ehead->uuid));
2151 + memset(ehead->md5sum, 0, sizeof(ehead->md5sum));
2152 +
2153 + g_checksum_reset(vmaw->md5csum);
2154 + g_checksum_update(vmaw->md5csum, vmaw->outbuf, VMA_EXTENT_HEADER_SIZE);
2155 + gsize csize = 16;
2156 + g_checksum_get_digest(vmaw->md5csum, ehead->md5sum, &csize);
2157 +
2158 + int bytes = vmaw->outbuf_pos;
2159 + ret = vma_queue_write(vmaw, vmaw->outbuf, bytes);
2160 + if (ret != bytes) {
2161 + vma_writer_set_error(vmaw, "vma_writer_flush: failed write");
2162 + }
2163 +
2164 + vmaw->outbuf_count = 0;
2165 + vmaw->outbuf_pos = VMA_EXTENT_HEADER_SIZE;
2166 +
2167 + for (i = 0; i < VMA_BLOCKS_PER_EXTENT; i++) {
2168 + vmaw->outbuf_block_info[i] = 0;
2169 + }
2170 +
2171 + return vmaw->status;
2172 +}
2173 +
2174 +static int vma_count_open_streams(VmaWriter *vmaw)
2175 +{
2176 + g_assert(vmaw != NULL);
2177 +
2178 + int i;
2179 + int open_drives = 0;
2180 + for (i = 0; i <= 255; i++) {
2181 + if (vmaw->stream_info[i].size && !vmaw->stream_info[i].finished) {
2182 + open_drives++;
2183 + }
2184 + }
2185 +
2186 + return open_drives;
2187 +}
2188 +
2189 +
2190 +/**
2191 + * You need to call this if the vma archive does not contain
2192 + * any data stream.
2193 + */
2194 +int coroutine_fn
2195 +vma_writer_flush_output(VmaWriter *vmaw)
2196 +{
2197 + qemu_co_mutex_lock(&vmaw->flush_lock);
2198 + int ret = vma_writer_flush(vmaw);
2199 + qemu_co_mutex_unlock(&vmaw->flush_lock);
2200 + if (ret < 0) {
2201 + vma_writer_set_error(vmaw, "vma_writer_flush_header failed");
2202 + }
2203 + return ret;
2204 +}
2205 +
2206 +/**
2207 + * all jobs should call this when there is no more data
2208 + * Returns: number of remaining stream (0 ==> finished)
2209 + */
2210 +int coroutine_fn
2211 +vma_writer_close_stream(VmaWriter *vmaw, uint8_t dev_id)
2212 +{
2213 + g_assert(vmaw != NULL);
2214 +
2215 + DPRINTF("vma_writer_set_status %d\n", dev_id);
2216 + if (!vmaw->stream_info[dev_id].size) {
2217 + vma_writer_set_error(vmaw, "vma_writer_close_stream: "
2218 + "no such stream %d", dev_id);
2219 + return -1;
2220 + }
2221 + if (vmaw->stream_info[dev_id].finished) {
2222 + vma_writer_set_error(vmaw, "vma_writer_close_stream: "
2223 + "stream already closed %d", dev_id);
2224 + return -1;
2225 + }
2226 +
2227 + vmaw->stream_info[dev_id].finished = true;
2228 +
2229 + int open_drives = vma_count_open_streams(vmaw);
2230 +
2231 + if (open_drives <= 0) {
2232 + DPRINTF("vma_writer_set_status all drives completed\n");
2233 + vma_writer_flush_output(vmaw);
2234 + }
2235 +
2236 + return open_drives;
2237 +}
2238 +
2239 +int vma_writer_get_status(VmaWriter *vmaw, VmaStatus *status)
2240 +{
2241 + int i;
2242 +
2243 + g_assert(vmaw != NULL);
2244 +
2245 + if (status) {
2246 + status->status = vmaw->status;
2247 + g_strlcpy(status->errmsg, vmaw->errmsg, sizeof(status->errmsg));
2248 + for (i = 0; i <= 255; i++) {
2249 + status->stream_info[i] = vmaw->stream_info[i];
2250 + }
2251 +
2252 + uuid_unparse_lower(vmaw->uuid, status->uuid_str);
2253 + }
2254 +
2255 + status->closed = vmaw->closed;
2256 +
2257 + return vmaw->status;
2258 +}
2259 +
2260 +static int vma_writer_get_buffer(VmaWriter *vmaw)
2261 +{
2262 + int ret = 0;
2263 +
2264 + qemu_co_mutex_lock(&vmaw->flush_lock);
2265 +
2266 + /* wait until buffer is available */
2267 + while (vmaw->outbuf_count >= (VMA_BLOCKS_PER_EXTENT - 1)) {
2268 + ret = vma_writer_flush(vmaw);
2269 + if (ret < 0) {
2270 + vma_writer_set_error(vmaw, "vma_writer_get_buffer: flush failed");
2271 + break;
2272 + }
2273 + }
2274 +
2275 + qemu_co_mutex_unlock(&vmaw->flush_lock);
2276 +
2277 + return ret;
2278 +}
2279 +
2280 +
2281 +int64_t coroutine_fn
2282 +vma_writer_write(VmaWriter *vmaw, uint8_t dev_id, int64_t cluster_num,
2283 + unsigned char *buf, size_t *zero_bytes)
2284 +{
2285 + g_assert(vmaw != NULL);
2286 + g_assert(zero_bytes != NULL);
2287 +
2288 + *zero_bytes = 0;
2289 +
2290 + if (vmaw->status < 0) {
2291 + return vmaw->status;
2292 + }
2293 +
2294 + if (!dev_id || !vmaw->stream_info[dev_id].size) {
2295 + vma_writer_set_error(vmaw, "vma_writer_write: "
2296 + "no such stream %d", dev_id);
2297 + return -1;
2298 + }
2299 +
2300 + if (vmaw->stream_info[dev_id].finished) {
2301 + vma_writer_set_error(vmaw, "vma_writer_write: "
2302 + "stream already closed %d", dev_id);
2303 + return -1;
2304 + }
2305 +
2306 +
2307 + if (cluster_num >= (((uint64_t)1)<<32)) {
2308 + vma_writer_set_error(vmaw, "vma_writer_write: "
2309 + "cluster number out of range");
2310 + return -1;
2311 + }
2312 +
2313 + if (dev_id == vmaw->vmstate_stream) {
2314 + if (cluster_num != vmaw->vmstate_clusters) {
2315 + vma_writer_set_error(vmaw, "vma_writer_write: "
2316 + "non sequential vmstate write");
2317 + }
2318 + vmaw->vmstate_clusters++;
2319 + } else if (cluster_num >= vmaw->stream_info[dev_id].cluster_count) {
2320 + vma_writer_set_error(vmaw, "vma_writer_write: cluster number too big");
2321 + return -1;
2322 + }
2323 +
2324 + /* wait until buffer is available */
2325 + if (vma_writer_get_buffer(vmaw) < 0) {
2326 + vma_writer_set_error(vmaw, "vma_writer_write: "
2327 + "vma_writer_get_buffer failed");
2328 + return -1;
2329 + }
2330 +
2331 + DPRINTF("VMA WRITE %d %zd\n", dev_id, cluster_num);
2332 +
2333 + uint16_t mask = 0;
2334 +
2335 + if (buf) {
2336 + int i;
2337 + int bit = 1;
2338 + for (i = 0; i < 16; i++) {
2339 + unsigned char *vmablock = buf + (i*VMA_BLOCK_SIZE);
2340 + if (!buffer_is_zero(vmablock, VMA_BLOCK_SIZE)) {
2341 + mask |= bit;
2342 + memcpy(vmaw->outbuf + vmaw->outbuf_pos, vmablock,
2343 + VMA_BLOCK_SIZE);
2344 + vmaw->outbuf_pos += VMA_BLOCK_SIZE;
2345 + } else {
2346 + DPRINTF("VMA WRITE %zd ZERO BLOCK %d\n", cluster_num, i);
2347 + vmaw->stream_info[dev_id].zero_bytes += VMA_BLOCK_SIZE;
2348 + *zero_bytes += VMA_BLOCK_SIZE;
2349 + }
2350 +
2351 + bit = bit << 1;
2352 + }
2353 + } else {
2354 + DPRINTF("VMA WRITE %zd ZERO CLUSTER\n", cluster_num);
2355 + vmaw->stream_info[dev_id].zero_bytes += VMA_CLUSTER_SIZE;
2356 + *zero_bytes += VMA_CLUSTER_SIZE;
2357 + }
2358 +
2359 + uint64_t block_info = ((uint64_t)mask) << (32+16);
2360 + block_info |= ((uint64_t)dev_id) << 32;
2361 + block_info |= (cluster_num & 0xffffffff);
2362 + vmaw->outbuf_block_info[vmaw->outbuf_count] = block_info;
2363 +
2364 + DPRINTF("VMA WRITE MASK %zd %zx\n", cluster_num, block_info);
2365 +
2366 + vmaw->outbuf_count++;
2367 +
2368 + /** NOTE: We allways write whole clusters, but we correctly set
2369 + * transferred bytes. So transferred == size when when everything
2370 + * went OK.
2371 + */
2372 + size_t transferred = VMA_CLUSTER_SIZE;
2373 +
2374 + if (dev_id != vmaw->vmstate_stream) {
2375 + uint64_t last = (cluster_num + 1) * VMA_CLUSTER_SIZE;
2376 + if (last > vmaw->stream_info[dev_id].size) {
2377 + uint64_t diff = last - vmaw->stream_info[dev_id].size;
2378 + if (diff >= VMA_CLUSTER_SIZE) {
2379 + vma_writer_set_error(vmaw, "vma_writer_write: "
2380 + "read after last cluster");
2381 + return -1;
2382 + }
2383 + transferred -= diff;
2384 + }
2385 + }
2386 +
2387 + vmaw->stream_info[dev_id].transferred += transferred;
2388 +
2389 + return transferred;
2390 +}
2391 +
2392 +void vma_writer_error_propagate(VmaWriter *vmaw, Error **errp)
2393 +{
2394 + if (vmaw->status < 0 && *errp == NULL) {
2395 + error_setg(errp, "%s", vmaw->errmsg);
2396 + }
2397 +}
2398 +
2399 +int vma_writer_close(VmaWriter *vmaw, Error **errp)
2400 +{
2401 + g_assert(vmaw != NULL);
2402 +
2403 + int i;
2404 +
2405 + while (vmaw->co_writer) {
2406 + aio_poll(qemu_get_aio_context(), true);
2407 + }
2408 +
2409 + assert(vmaw->co_writer == NULL);
2410 +
2411 + if (vmaw->cmd) {
2412 + if (pclose(vmaw->cmd) < 0) {
2413 + vma_writer_set_error(vmaw, "vma_writer_close: "
2414 + "pclose failed - %s", g_strerror(errno));
2415 + }
2416 + } else {
2417 + if (close(vmaw->fd) < 0) {
2418 + vma_writer_set_error(vmaw, "vma_writer_close: "
2419 + "close failed - %s", g_strerror(errno));
2420 + }
2421 + }
2422 +
2423 + for (i = 0; i <= 255; i++) {
2424 + VmaStreamInfo *si = &vmaw->stream_info[i];
2425 + if (si->size) {
2426 + if (!si->finished) {
2427 + vma_writer_set_error(vmaw, "vma_writer_close: "
2428 + "detected open stream '%s'", si->devname);
2429 + } else if ((si->transferred != si->size) &&
2430 + (i != vmaw->vmstate_stream)) {
2431 + vma_writer_set_error(vmaw, "vma_writer_close: "
2432 + "incomplete stream '%s' (%zd != %zd)",
2433 + si->devname, si->transferred, si->size);
2434 + }
2435 + }
2436 + }
2437 +
2438 + for (i = 0; i <= 255; i++) {
2439 + vmaw->stream_info[i].finished = 1; /* mark as closed */
2440 + }
2441 +
2442 + vmaw->closed = 1;
2443 +
2444 + if (vmaw->status < 0 && *errp == NULL) {
2445 + error_setg(errp, "%s", vmaw->errmsg);
2446 + }
2447 +
2448 + return vmaw->status;
2449 +}
2450 +
2451 +void vma_writer_destroy(VmaWriter *vmaw)
2452 +{
2453 + assert(vmaw);
2454 +
2455 + int i;
2456 +
2457 + for (i = 0; i <= 255; i++) {
2458 + if (vmaw->stream_info[i].devname) {
2459 + g_free(vmaw->stream_info[i].devname);
2460 + }
2461 + }
2462 +
2463 + if (vmaw->md5csum) {
2464 + g_checksum_free(vmaw->md5csum);
2465 + }
2466 +
2467 + g_free(vmaw);
2468 +}
2469 diff --git a/vma.c b/vma.c
2470 new file mode 100644
2471 index 0000000000..04915427c8
2472 --- /dev/null
2473 +++ b/vma.c
2474 @@ -0,0 +1,757 @@
2475 +/*
2476 + * VMA: Virtual Machine Archive
2477 + *
2478 + * Copyright (C) 2012-2013 Proxmox Server Solutions
2479 + *
2480 + * Authors:
2481 + * Dietmar Maurer (dietmar@proxmox.com)
2482 + *
2483 + * This work is licensed under the terms of the GNU GPL, version 2 or later.
2484 + * See the COPYING file in the top-level directory.
2485 + *
2486 + */
2487 +
2488 +#include "qemu/osdep.h"
2489 +#include <glib.h>
2490 +
2491 +#include "vma.h"
2492 +#include "qemu-common.h"
2493 +#include "qemu/error-report.h"
2494 +#include "qemu/main-loop.h"
2495 +#include "qapi/qmp/qstring.h"
2496 +#include "sysemu/char.h" /* qstring_from_str */
2497 +#include "sysemu/block-backend.h"
2498 +
2499 +static void help(void)
2500 +{
2501 + const char *help_msg =
2502 + "usage: vma command [command options]\n"
2503 + "\n"
2504 + "vma list <filename>\n"
2505 + "vma config <filename> [-c config]\n"
2506 + "vma create <filename> [-c config] pathname ...\n"
2507 + "vma extract <filename> [-r <fifo>] <targetdir>\n"
2508 + "vma verify <filename> [-v]\n"
2509 + ;
2510 +
2511 + printf("%s", help_msg);
2512 + exit(1);
2513 +}
2514 +
2515 +static const char *extract_devname(const char *path, char **devname, int index)
2516 +{
2517 + assert(path);
2518 +
2519 + const char *sep = strchr(path, '=');
2520 +
2521 + if (sep) {
2522 + *devname = g_strndup(path, sep - path);
2523 + path = sep + 1;
2524 + } else {
2525 + if (index >= 0) {
2526 + *devname = g_strdup_printf("disk%d", index);
2527 + } else {
2528 + *devname = NULL;
2529 + }
2530 + }
2531 +
2532 + return path;
2533 +}
2534 +
2535 +static void print_content(VmaReader *vmar)
2536 +{
2537 + assert(vmar);
2538 +
2539 + VmaHeader *head = vma_reader_get_header(vmar);
2540 +
2541 + GList *l = vma_reader_get_config_data(vmar);
2542 + while (l && l->data) {
2543 + VmaConfigData *cdata = (VmaConfigData *)l->data;
2544 + l = g_list_next(l);
2545 + printf("CFG: size: %d name: %s\n", cdata->len, cdata->name);
2546 + }
2547 +
2548 + int i;
2549 + VmaDeviceInfo *di;
2550 + for (i = 1; i < 255; i++) {
2551 + di = vma_reader_get_device_info(vmar, i);
2552 + if (di) {
2553 + if (strcmp(di->devname, "vmstate") == 0) {
2554 + printf("VMSTATE: dev_id=%d memory: %zd\n", i, di->size);
2555 + } else {
2556 + printf("DEV: dev_id=%d size: %zd devname: %s\n",
2557 + i, di->size, di->devname);
2558 + }
2559 + }
2560 + }
2561 + /* ctime is the last entry we print */
2562 + printf("CTIME: %s", ctime(&head->ctime));
2563 + fflush(stdout);
2564 +}
2565 +
2566 +static int list_content(int argc, char **argv)
2567 +{
2568 + int c, ret = 0;
2569 + const char *filename;
2570 +
2571 + for (;;) {
2572 + c = getopt(argc, argv, "h");
2573 + if (c == -1) {
2574 + break;
2575 + }
2576 + switch (c) {
2577 + case '?':
2578 + case 'h':
2579 + help();
2580 + break;
2581 + default:
2582 + g_assert_not_reached();
2583 + }
2584 + }
2585 +
2586 + /* Get the filename */
2587 + if ((optind + 1) != argc) {
2588 + help();
2589 + }
2590 + filename = argv[optind++];
2591 +
2592 + Error *errp = NULL;
2593 + VmaReader *vmar = vma_reader_create(filename, &errp);
2594 +
2595 + if (!vmar) {
2596 + g_error("%s", error_get_pretty(errp));
2597 + }
2598 +
2599 + print_content(vmar);
2600 +
2601 + vma_reader_destroy(vmar);
2602 +
2603 + return ret;
2604 +}
2605 +
2606 +typedef struct RestoreMap {
2607 + char *devname;
2608 + char *path;
2609 + char *format;
2610 + bool write_zero;
2611 +} RestoreMap;
2612 +
2613 +static int extract_content(int argc, char **argv)
2614 +{
2615 + int c, ret = 0;
2616 + int verbose = 0;
2617 + const char *filename;
2618 + const char *dirname;
2619 + const char *readmap = NULL;
2620 +
2621 + for (;;) {
2622 + c = getopt(argc, argv, "hvr:");
2623 + if (c == -1) {
2624 + break;
2625 + }
2626 + switch (c) {
2627 + case '?':
2628 + case 'h':
2629 + help();
2630 + break;
2631 + case 'r':
2632 + readmap = optarg;
2633 + break;
2634 + case 'v':
2635 + verbose = 1;
2636 + break;
2637 + default:
2638 + help();
2639 + }
2640 + }
2641 +
2642 + /* Get the filename */
2643 + if ((optind + 2) != argc) {
2644 + help();
2645 + }
2646 + filename = argv[optind++];
2647 + dirname = argv[optind++];
2648 +
2649 + Error *errp = NULL;
2650 + VmaReader *vmar = vma_reader_create(filename, &errp);
2651 +
2652 + if (!vmar) {
2653 + g_error("%s", error_get_pretty(errp));
2654 + }
2655 +
2656 + if (mkdir(dirname, 0777) < 0) {
2657 + g_error("unable to create target directory %s - %s",
2658 + dirname, g_strerror(errno));
2659 + }
2660 +
2661 + GList *l = vma_reader_get_config_data(vmar);
2662 + while (l && l->data) {
2663 + VmaConfigData *cdata = (VmaConfigData *)l->data;
2664 + l = g_list_next(l);
2665 + char *cfgfn = g_strdup_printf("%s/%s", dirname, cdata->name);
2666 + GError *err = NULL;
2667 + if (!g_file_set_contents(cfgfn, (gchar *)cdata->data, cdata->len,
2668 + &err)) {
2669 + g_error("unable to write file: %s", err->message);
2670 + }
2671 + }
2672 +
2673 + GHashTable *devmap = g_hash_table_new(g_str_hash, g_str_equal);
2674 +
2675 + if (readmap) {
2676 + print_content(vmar);
2677 +
2678 + FILE *map = fopen(readmap, "r");
2679 + if (!map) {
2680 + g_error("unable to open fifo %s - %s", readmap, g_strerror(errno));
2681 + }
2682 +
2683 + while (1) {
2684 + char inbuf[8192];
2685 + char *line = fgets(inbuf, sizeof(inbuf), map);
2686 + if (!line || line[0] == '\0' || !strcmp(line, "done\n")) {
2687 + break;
2688 + }
2689 + int len = strlen(line);
2690 + if (line[len - 1] == '\n') {
2691 + line[len - 1] = '\0';
2692 + if (len == 1) {
2693 + break;
2694 + }
2695 + }
2696 +
2697 + char *format = NULL;
2698 + if (strncmp(line, "format=", sizeof("format=")-1) == 0) {
2699 + format = line + sizeof("format=")-1;
2700 + char *colon = strchr(format, ':');
2701 + if (!colon) {
2702 + g_error("read map failed - found only a format ('%s')", inbuf);
2703 + }
2704 + format = g_strndup(format, colon - format);
2705 + line = colon+1;
2706 + }
2707 +
2708 + const char *path;
2709 + bool write_zero;
2710 + if (line[0] == '0' && line[1] == ':') {
2711 + path = line + 2;
2712 + write_zero = false;
2713 + } else if (line[0] == '1' && line[1] == ':') {
2714 + path = line + 2;
2715 + write_zero = true;
2716 + } else {
2717 + g_error("read map failed - parse error ('%s')", inbuf);
2718 + }
2719 +
2720 + char *devname = NULL;
2721 + path = extract_devname(path, &devname, -1);
2722 + if (!devname) {
2723 + g_error("read map failed - no dev name specified ('%s')",
2724 + inbuf);
2725 + }
2726 +
2727 + RestoreMap *map = g_new0(RestoreMap, 1);
2728 + map->devname = g_strdup(devname);
2729 + map->path = g_strdup(path);
2730 + map->format = format;
2731 + map->write_zero = write_zero;
2732 +
2733 + g_hash_table_insert(devmap, map->devname, map);
2734 +
2735 + };
2736 + }
2737 +
2738 + int i;
2739 + int vmstate_fd = -1;
2740 + guint8 vmstate_stream = 0;
2741 +
2742 + BlockBackend *blk = NULL;
2743 +
2744 + for (i = 1; i < 255; i++) {
2745 + VmaDeviceInfo *di = vma_reader_get_device_info(vmar, i);
2746 + if (di && (strcmp(di->devname, "vmstate") == 0)) {
2747 + vmstate_stream = i;
2748 + char *statefn = g_strdup_printf("%s/vmstate.bin", dirname);
2749 + vmstate_fd = open(statefn, O_WRONLY|O_CREAT|O_EXCL, 0644);
2750 + if (vmstate_fd < 0) {
2751 + g_error("create vmstate file '%s' failed - %s", statefn,
2752 + g_strerror(errno));
2753 + }
2754 + g_free(statefn);
2755 + } else if (di) {
2756 + char *devfn = NULL;
2757 + const char *format = NULL;
2758 + int flags = BDRV_O_RDWR | BDRV_O_NO_FLUSH;
2759 + bool write_zero = true;
2760 +
2761 + if (readmap) {
2762 + RestoreMap *map;
2763 + map = (RestoreMap *)g_hash_table_lookup(devmap, di->devname);
2764 + if (map == NULL) {
2765 + g_error("no device name mapping for %s", di->devname);
2766 + }
2767 + devfn = map->path;
2768 + format = map->format;
2769 + write_zero = map->write_zero;
2770 + } else {
2771 + devfn = g_strdup_printf("%s/tmp-disk-%s.raw",
2772 + dirname, di->devname);
2773 + printf("DEVINFO %s %zd\n", devfn, di->size);
2774 +
2775 + bdrv_img_create(devfn, "raw", NULL, NULL, NULL, di->size,
2776 + flags, &errp, 0);
2777 + if (errp) {
2778 + g_error("can't create file %s: %s", devfn,
2779 + error_get_pretty(errp));
2780 + }
2781 +
2782 + /* Note: we created an empty file above, so there is no
2783 + * need to write zeroes (so we generate a sparse file)
2784 + */
2785 + write_zero = false;
2786 + }
2787 +
2788 + size_t devlen = strlen(devfn);
2789 + QDict *options = NULL;
2790 + if (format) {
2791 + /* explicit format from commandline */
2792 + options = qdict_new();
2793 + qdict_put(options, "driver", qstring_from_str(format));
2794 + } else if ((devlen > 4 && strcmp(devfn+devlen-4, ".raw") == 0) ||
2795 + strncmp(devfn, "/dev/", 5) == 0)
2796 + {
2797 + /* This part is now deprecated for PVE as well (just as qemu
2798 + * deprecated not specifying an explicit raw format, too.
2799 + */
2800 + /* explicit raw format */
2801 + options = qdict_new();
2802 + qdict_put(options, "driver", qstring_from_str("raw"));
2803 + }
2804 +
2805 +
2806 + if (errp || !(blk = blk_new_open(devfn, NULL, options, flags, &errp))) {
2807 + g_error("can't open file %s - %s", devfn,
2808 + error_get_pretty(errp));
2809 + }
2810 +
2811 + if (vma_reader_register_bs(vmar, i, blk, write_zero, &errp) < 0) {
2812 + g_error("%s", error_get_pretty(errp));
2813 + }
2814 +
2815 + if (!readmap) {
2816 + g_free(devfn);
2817 + }
2818 + }
2819 + }
2820 +
2821 + if (vma_reader_restore(vmar, vmstate_fd, verbose, &errp) < 0) {
2822 + g_error("restore failed - %s", error_get_pretty(errp));
2823 + }
2824 +
2825 + if (!readmap) {
2826 + for (i = 1; i < 255; i++) {
2827 + VmaDeviceInfo *di = vma_reader_get_device_info(vmar, i);
2828 + if (di && (i != vmstate_stream)) {
2829 + char *tmpfn = g_strdup_printf("%s/tmp-disk-%s.raw",
2830 + dirname, di->devname);
2831 + char *fn = g_strdup_printf("%s/disk-%s.raw",
2832 + dirname, di->devname);
2833 + if (rename(tmpfn, fn) != 0) {
2834 + g_error("rename %s to %s failed - %s",
2835 + tmpfn, fn, g_strerror(errno));
2836 + }
2837 + }
2838 + }
2839 + }
2840 +
2841 + vma_reader_destroy(vmar);
2842 +
2843 + blk_unref(blk);
2844 +
2845 + bdrv_close_all();
2846 +
2847 + return ret;
2848 +}
2849 +
2850 +static int verify_content(int argc, char **argv)
2851 +{
2852 + int c, ret = 0;
2853 + int verbose = 0;
2854 + const char *filename;
2855 +
2856 + for (;;) {
2857 + c = getopt(argc, argv, "hv");
2858 + if (c == -1) {
2859 + break;
2860 + }
2861 + switch (c) {
2862 + case '?':
2863 + case 'h':
2864 + help();
2865 + break;
2866 + case 'v':
2867 + verbose = 1;
2868 + break;
2869 + default:
2870 + help();
2871 + }
2872 + }
2873 +
2874 + /* Get the filename */
2875 + if ((optind + 1) != argc) {
2876 + help();
2877 + }
2878 + filename = argv[optind++];
2879 +
2880 + Error *errp = NULL;
2881 + VmaReader *vmar = vma_reader_create(filename, &errp);
2882 +
2883 + if (!vmar) {
2884 + g_error("%s", error_get_pretty(errp));
2885 + }
2886 +
2887 + if (verbose) {
2888 + print_content(vmar);
2889 + }
2890 +
2891 + if (vma_reader_verify(vmar, verbose, &errp) < 0) {
2892 + g_error("verify failed - %s", error_get_pretty(errp));
2893 + }
2894 +
2895 + vma_reader_destroy(vmar);
2896 +
2897 + bdrv_close_all();
2898 +
2899 + return ret;
2900 +}
2901 +
2902 +typedef struct BackupJob {
2903 + BlockBackend *target;
2904 + int64_t len;
2905 + VmaWriter *vmaw;
2906 + uint8_t dev_id;
2907 +} BackupJob;
2908 +
2909 +#define BACKUP_SECTORS_PER_CLUSTER (VMA_CLUSTER_SIZE / BDRV_SECTOR_SIZE)
2910 +
2911 +static void coroutine_fn backup_run_empty(void *opaque)
2912 +{
2913 + VmaWriter *vmaw = (VmaWriter *)opaque;
2914 +
2915 + vma_writer_flush_output(vmaw);
2916 +
2917 + Error *err = NULL;
2918 + if (vma_writer_close(vmaw, &err) != 0) {
2919 + g_warning("vma_writer_close failed %s", error_get_pretty(err));
2920 + }
2921 +}
2922 +
2923 +static void coroutine_fn backup_run(void *opaque)
2924 +{
2925 + BackupJob *job = (BackupJob *)opaque;
2926 + struct iovec iov;
2927 + QEMUIOVector qiov;
2928 +
2929 + int64_t start, end;
2930 + int ret = 0;
2931 +
2932 + unsigned char *buf = blk_blockalign(job->target, VMA_CLUSTER_SIZE);
2933 +
2934 + start = 0;
2935 + end = DIV_ROUND_UP(job->len / BDRV_SECTOR_SIZE,
2936 + BACKUP_SECTORS_PER_CLUSTER);
2937 +
2938 + for (; start < end; start++) {
2939 + iov.iov_base = buf;
2940 + iov.iov_len = VMA_CLUSTER_SIZE;
2941 + qemu_iovec_init_external(&qiov, &iov, 1);
2942 +
2943 + ret = blk_co_preadv(job->target, start * VMA_CLUSTER_SIZE,
2944 + VMA_CLUSTER_SIZE, &qiov, 0);
2945 + if (ret < 0) {
2946 + vma_writer_set_error(job->vmaw, "read error", -1);
2947 + goto out;
2948 + }
2949 +
2950 + size_t zb = 0;
2951 + if (vma_writer_write(job->vmaw, job->dev_id, start, buf, &zb) < 0) {
2952 + vma_writer_set_error(job->vmaw, "backup_dump_cb vma_writer_write failed", -1);
2953 + goto out;
2954 + }
2955 + }
2956 +
2957 +
2958 +out:
2959 + if (vma_writer_close_stream(job->vmaw, job->dev_id) <= 0) {
2960 + Error *err = NULL;
2961 + if (vma_writer_close(job->vmaw, &err) != 0) {
2962 + g_warning("vma_writer_close failed %s", error_get_pretty(err));
2963 + }
2964 + }
2965 +}
2966 +
2967 +static int create_archive(int argc, char **argv)
2968 +{
2969 + int i, c;
2970 + int verbose = 0;
2971 + const char *archivename;
2972 + GList *config_files = NULL;
2973 +
2974 + for (;;) {
2975 + c = getopt(argc, argv, "hvc:");
2976 + if (c == -1) {
2977 + break;
2978 + }
2979 + switch (c) {
2980 + case '?':
2981 + case 'h':
2982 + help();
2983 + break;
2984 + case 'c':
2985 + config_files = g_list_append(config_files, optarg);
2986 + break;
2987 + case 'v':
2988 + verbose = 1;
2989 + break;
2990 + default:
2991 + g_assert_not_reached();
2992 + }
2993 + }
2994 +
2995 +
2996 + /* make sure we an archive name */
2997 + if ((optind + 1) > argc) {
2998 + help();
2999 + }
3000 +
3001 + archivename = argv[optind++];
3002 +
3003 + uuid_t uuid;
3004 + uuid_generate(uuid);
3005 +
3006 + Error *local_err = NULL;
3007 + VmaWriter *vmaw = vma_writer_create(archivename, uuid, &local_err);
3008 +
3009 + if (vmaw == NULL) {
3010 + g_error("%s", error_get_pretty(local_err));
3011 + }
3012 +
3013 + GList *l = config_files;
3014 + while (l && l->data) {
3015 + char *name = l->data;
3016 + char *cdata = NULL;
3017 + gsize clen = 0;
3018 + GError *err = NULL;
3019 + if (!g_file_get_contents(name, &cdata, &clen, &err)) {
3020 + unlink(archivename);
3021 + g_error("Unable to read file: %s", err->message);
3022 + }
3023 +
3024 + if (vma_writer_add_config(vmaw, name, cdata, clen) != 0) {
3025 + unlink(archivename);
3026 + g_error("Unable to append config data %s (len = %zd)",
3027 + name, clen);
3028 + }
3029 + l = g_list_next(l);
3030 + }
3031 +
3032 + int devcount = 0;
3033 + while (optind < argc) {
3034 + const char *path = argv[optind++];
3035 + char *devname = NULL;
3036 + path = extract_devname(path, &devname, devcount++);
3037 +
3038 + Error *errp = NULL;
3039 + BlockBackend *target;
3040 +
3041 + target = blk_new_open(path, NULL, NULL, 0, &errp);
3042 + if (!target) {
3043 + unlink(archivename);
3044 + g_error("bdrv_open '%s' failed - %s", path, error_get_pretty(errp));
3045 + }
3046 + int64_t size = blk_getlength(target);
3047 + int dev_id = vma_writer_register_stream(vmaw, devname, size);
3048 + if (dev_id <= 0) {
3049 + unlink(archivename);
3050 + g_error("vma_writer_register_stream '%s' failed", devname);
3051 + }
3052 +
3053 + BackupJob *job = g_new0(BackupJob, 1);
3054 + job->len = size;
3055 + job->target = target;
3056 + job->vmaw = vmaw;
3057 + job->dev_id = dev_id;
3058 +
3059 + Coroutine *co = qemu_coroutine_create(backup_run, job);
3060 + qemu_coroutine_enter(co);
3061 + }
3062 +
3063 + VmaStatus vmastat;
3064 + int percent = 0;
3065 + int last_percent = -1;
3066 +
3067 + if (devcount) {
3068 + while (1) {
3069 + main_loop_wait(false);
3070 + vma_writer_get_status(vmaw, &vmastat);
3071 +
3072 + if (verbose) {
3073 +
3074 + uint64_t total = 0;
3075 + uint64_t transferred = 0;
3076 + uint64_t zero_bytes = 0;
3077 +
3078 + int i;
3079 + for (i = 0; i < 256; i++) {
3080 + if (vmastat.stream_info[i].size) {
3081 + total += vmastat.stream_info[i].size;
3082 + transferred += vmastat.stream_info[i].transferred;
3083 + zero_bytes += vmastat.stream_info[i].zero_bytes;
3084 + }
3085 + }
3086 + percent = (transferred*100)/total;
3087 + if (percent != last_percent) {
3088 + fprintf(stderr, "progress %d%% %zd/%zd %zd\n", percent,
3089 + transferred, total, zero_bytes);
3090 + fflush(stderr);
3091 +
3092 + last_percent = percent;
3093 + }
3094 + }
3095 +
3096 + if (vmastat.closed) {
3097 + break;
3098 + }
3099 + }
3100 + } else {
3101 + Coroutine *co = qemu_coroutine_create(backup_run_empty, vmaw);
3102 + qemu_coroutine_enter(co);
3103 + while (1) {
3104 + main_loop_wait(false);
3105 + vma_writer_get_status(vmaw, &vmastat);
3106 + if (vmastat.closed) {
3107 + break;
3108 + }
3109 + }
3110 + }
3111 +
3112 + bdrv_drain_all();
3113 +
3114 + vma_writer_get_status(vmaw, &vmastat);
3115 +
3116 + if (verbose) {
3117 + for (i = 0; i < 256; i++) {
3118 + VmaStreamInfo *si = &vmastat.stream_info[i];
3119 + if (si->size) {
3120 + fprintf(stderr, "image %s: size=%zd zeros=%zd saved=%zd\n",
3121 + si->devname, si->size, si->zero_bytes,
3122 + si->size - si->zero_bytes);
3123 + }
3124 + }
3125 + }
3126 +
3127 + if (vmastat.status < 0) {
3128 + unlink(archivename);
3129 + g_error("creating vma archive failed");
3130 + }
3131 +
3132 + return 0;
3133 +}
3134 +
3135 +static int dump_config(int argc, char **argv)
3136 +{
3137 + int c, ret = 0;
3138 + const char *filename;
3139 + const char *config_name = "qemu-server.conf";
3140 +
3141 + for (;;) {
3142 + c = getopt(argc, argv, "hc:");
3143 + if (c == -1) {
3144 + break;
3145 + }
3146 + switch (c) {
3147 + case '?':
3148 + case 'h':
3149 + help();
3150 + break;
3151 + case 'c':
3152 + config_name = optarg;
3153 + break;
3154 + default:
3155 + help();
3156 + }
3157 + }
3158 +
3159 + /* Get the filename */
3160 + if ((optind + 1) != argc) {
3161 + help();
3162 + }
3163 + filename = argv[optind++];
3164 +
3165 + Error *errp = NULL;
3166 + VmaReader *vmar = vma_reader_create(filename, &errp);
3167 +
3168 + if (!vmar) {
3169 + g_error("%s", error_get_pretty(errp));
3170 + }
3171 +
3172 + int found = 0;
3173 + GList *l = vma_reader_get_config_data(vmar);
3174 + while (l && l->data) {
3175 + VmaConfigData *cdata = (VmaConfigData *)l->data;
3176 + l = g_list_next(l);
3177 + if (strcmp(cdata->name, config_name) == 0) {
3178 + found = 1;
3179 + fwrite(cdata->data, cdata->len, 1, stdout);
3180 + break;
3181 + }
3182 + }
3183 +
3184 + vma_reader_destroy(vmar);
3185 +
3186 + bdrv_close_all();
3187 +
3188 + if (!found) {
3189 + fprintf(stderr, "unable to find configuration data '%s'\n", config_name);
3190 + return -1;
3191 + }
3192 +
3193 + return ret;
3194 +}
3195 +
3196 +int main(int argc, char **argv)
3197 +{
3198 + const char *cmdname;
3199 + Error *main_loop_err = NULL;
3200 +
3201 + error_set_progname(argv[0]);
3202 +
3203 + if (qemu_init_main_loop(&main_loop_err)) {
3204 + g_error("%s", error_get_pretty(main_loop_err));
3205 + }
3206 +
3207 + bdrv_init();
3208 +
3209 + if (argc < 2) {
3210 + help();
3211 + }
3212 +
3213 + cmdname = argv[1];
3214 + argc--; argv++;
3215 +
3216 +
3217 + if (!strcmp(cmdname, "list")) {
3218 + return list_content(argc, argv);
3219 + } else if (!strcmp(cmdname, "create")) {
3220 + return create_archive(argc, argv);
3221 + } else if (!strcmp(cmdname, "extract")) {
3222 + return extract_content(argc, argv);
3223 + } else if (!strcmp(cmdname, "verify")) {
3224 + return verify_content(argc, argv);
3225 + } else if (!strcmp(cmdname, "config")) {
3226 + return dump_config(argc, argv);
3227 + }
3228 +
3229 + help();
3230 + return 0;
3231 +}
3232 diff --git a/vma.h b/vma.h
3233 new file mode 100644
3234 index 0000000000..fa6f4df7e7
3235 --- /dev/null
3236 +++ b/vma.h
3237 @@ -0,0 +1,149 @@
3238 +/*
3239 + * VMA: Virtual Machine Archive
3240 + *
3241 + * Copyright (C) Proxmox Server Solutions
3242 + *
3243 + * Authors:
3244 + * Dietmar Maurer (dietmar@proxmox.com)
3245 + *
3246 + * This work is licensed under the terms of the GNU GPL, version 2 or later.
3247 + * See the COPYING file in the top-level directory.
3248 + *
3249 + */
3250 +
3251 +#ifndef BACKUP_VMA_H
3252 +#define BACKUP_VMA_H
3253 +
3254 +#include <uuid/uuid.h>
3255 +#include "qapi/error.h"
3256 +#include "block/block.h"
3257 +
3258 +#define VMA_BLOCK_BITS 12
3259 +#define VMA_BLOCK_SIZE (1<<VMA_BLOCK_BITS)
3260 +#define VMA_CLUSTER_BITS (VMA_BLOCK_BITS+4)
3261 +#define VMA_CLUSTER_SIZE (1<<VMA_CLUSTER_BITS)
3262 +
3263 +#if VMA_CLUSTER_SIZE != 65536
3264 +#error unexpected cluster size
3265 +#endif
3266 +
3267 +#define VMA_EXTENT_HEADER_SIZE 512
3268 +#define VMA_BLOCKS_PER_EXTENT 59
3269 +#define VMA_MAX_CONFIGS 256
3270 +
3271 +#define VMA_MAX_EXTENT_SIZE \
3272 + (VMA_EXTENT_HEADER_SIZE+VMA_CLUSTER_SIZE*VMA_BLOCKS_PER_EXTENT)
3273 +#if VMA_MAX_EXTENT_SIZE != 3867136
3274 +#error unexpected VMA_EXTENT_SIZE
3275 +#endif
3276 +
3277 +/* File Format Definitions */
3278 +
3279 +#define VMA_MAGIC (GUINT32_TO_BE(('V'<<24)|('M'<<16)|('A'<<8)|0x00))
3280 +#define VMA_EXTENT_MAGIC (GUINT32_TO_BE(('V'<<24)|('M'<<16)|('A'<<8)|'E'))
3281 +
3282 +typedef struct VmaDeviceInfoHeader {
3283 + uint32_t devname_ptr; /* offset into blob_buffer table */
3284 + uint32_t reserved0;
3285 + uint64_t size; /* device size in bytes */
3286 + uint64_t reserved1;
3287 + uint64_t reserved2;
3288 +} VmaDeviceInfoHeader;
3289 +
3290 +typedef struct VmaHeader {
3291 + uint32_t magic;
3292 + uint32_t version;
3293 + unsigned char uuid[16];
3294 + int64_t ctime;
3295 + unsigned char md5sum[16];
3296 +
3297 + uint32_t blob_buffer_offset;
3298 + uint32_t blob_buffer_size;
3299 + uint32_t header_size;
3300 +
3301 + unsigned char reserved[1984];
3302 +
3303 + uint32_t config_names[VMA_MAX_CONFIGS]; /* offset into blob_buffer table */
3304 + uint32_t config_data[VMA_MAX_CONFIGS]; /* offset into blob_buffer table */
3305 +
3306 + uint32_t reserved1;
3307 +
3308 + VmaDeviceInfoHeader dev_info[256];
3309 +} VmaHeader;
3310 +
3311 +typedef struct VmaExtentHeader {
3312 + uint32_t magic;
3313 + uint16_t reserved1;
3314 + uint16_t block_count;
3315 + unsigned char uuid[16];
3316 + unsigned char md5sum[16];
3317 + uint64_t blockinfo[VMA_BLOCKS_PER_EXTENT];
3318 +} VmaExtentHeader;
3319 +
3320 +/* functions/definitions to read/write vma files */
3321 +
3322 +typedef struct VmaReader VmaReader;
3323 +
3324 +typedef struct VmaWriter VmaWriter;
3325 +
3326 +typedef struct VmaConfigData {
3327 + const char *name;
3328 + const void *data;
3329 + uint32_t len;
3330 +} VmaConfigData;
3331 +
3332 +typedef struct VmaStreamInfo {
3333 + uint64_t size;
3334 + uint64_t cluster_count;
3335 + uint64_t transferred;
3336 + uint64_t zero_bytes;
3337 + int finished;
3338 + char *devname;
3339 +} VmaStreamInfo;
3340 +
3341 +typedef struct VmaStatus {
3342 + int status;
3343 + bool closed;
3344 + char errmsg[8192];
3345 + char uuid_str[37];
3346 + VmaStreamInfo stream_info[256];
3347 +} VmaStatus;
3348 +
3349 +typedef struct VmaDeviceInfo {
3350 + uint64_t size; /* device size in bytes */
3351 + const char *devname;
3352 +} VmaDeviceInfo;
3353 +
3354 +VmaWriter *vma_writer_create(const char *filename, uuid_t uuid, Error **errp);
3355 +int vma_writer_close(VmaWriter *vmaw, Error **errp);
3356 +void vma_writer_error_propagate(VmaWriter *vmaw, Error **errp);
3357 +void vma_writer_destroy(VmaWriter *vmaw);
3358 +int vma_writer_add_config(VmaWriter *vmaw, const char *name, gpointer data,
3359 + size_t len);
3360 +int vma_writer_register_stream(VmaWriter *vmaw, const char *devname,
3361 + size_t size);
3362 +
3363 +int64_t coroutine_fn vma_writer_write(VmaWriter *vmaw, uint8_t dev_id,
3364 + int64_t cluster_num, unsigned char *buf,
3365 + size_t *zero_bytes);
3366 +
3367 +int coroutine_fn vma_writer_close_stream(VmaWriter *vmaw, uint8_t dev_id);
3368 +int coroutine_fn vma_writer_flush_output(VmaWriter *vmaw);
3369 +
3370 +int vma_writer_get_status(VmaWriter *vmaw, VmaStatus *status);
3371 +void vma_writer_set_error(VmaWriter *vmaw, const char *fmt, ...);
3372 +
3373 +
3374 +VmaReader *vma_reader_create(const char *filename, Error **errp);
3375 +void vma_reader_destroy(VmaReader *vmar);
3376 +VmaHeader *vma_reader_get_header(VmaReader *vmar);
3377 +GList *vma_reader_get_config_data(VmaReader *vmar);
3378 +VmaDeviceInfo *vma_reader_get_device_info(VmaReader *vmar, guint8 dev_id);
3379 +int vma_reader_register_bs(VmaReader *vmar, guint8 dev_id,
3380 + BlockBackend *target, bool write_zeroes,
3381 + Error **errp);
3382 +int vma_reader_restore(VmaReader *vmar, int vmstate_fd, bool verbose,
3383 + Error **errp);
3384 +int vma_reader_verify(VmaReader *vmar, bool verbose, Error **errp);
3385 +
3386 +#endif /* BACKUP_VMA_H */
3387 --
3388 2.11.0
3389
QEMU for PVE