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Merge remote-tracking branch 'jtc/tags/block-pull-request' into staging

# gpg: Signature made Tue 15 Nov 2016 04:10:29 AM GMT
# gpg:                using RSA key 0xBDBE7B27C0DE3057
# gpg: Good signature from "Jeffrey Cody <jcody@redhat.com>"
# gpg:                 aka "Jeffrey Cody <jeff@codyprime.org>"
# gpg:                 aka "Jeffrey Cody <codyprime@gmail.com>"
# Primary key fingerprint: 9957 4B4D 3474 90E7 9D98  D624 BDBE 7B27 C0DE 3057

* jtc/tags/block-pull-request:
  mirror: do not flush every time the disks are synced
  block/curl: Do not wait for data beyond EOF
  block/curl: Remember all sockets
  block/curl: Fix return value from curl_read_cb
  block/curl: Use BDRV_SECTOR_SIZE
  block/curl: Drop TFTP "support"
  qemu-iotests: avoid spurious failure on test 109
  iotests: add transactional failure race test
  blockjob: refactor backup_start as backup_job_create
  blockjob: add block_job_start
  blockjob: add .start field
  blockjob: add .clean property
  blockjob: fix dead pointer in txn list

Message-id: 1479183291-14086-1-git-send-email-jcody@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2016-11-15 12:00:13 +00:00
commit 1ed9bd12c8
19 changed files with 339 additions and 189 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
block/backup.c
View File

@ -242,6 +242,14 @@ static void backup_abort(BlockJob *job)
}
}
static void backup_clean(BlockJob *job)
{
BackupBlockJob *s = container_of(job, BackupBlockJob, common);
assert(s->target);
blk_unref(s->target);
s->target = NULL;
}
static void backup_attached_aio_context(BlockJob *job, AioContext *aio_context)
{
BackupBlockJob *s = container_of(job, BackupBlockJob, common);
@ -315,16 +323,6 @@ static void backup_drain(BlockJob *job)
}
}
static const BlockJobDriver backup_job_driver = {
.instance_size = sizeof(BackupBlockJob),
.job_type = BLOCK_JOB_TYPE_BACKUP,
.set_speed = backup_set_speed,
.commit = backup_commit,
.abort = backup_abort,
.attached_aio_context = backup_attached_aio_context,
.drain = backup_drain,
};
static BlockErrorAction backup_error_action(BackupBlockJob *job,
bool read, int error)
{
@ -343,12 +341,8 @@ typedef struct {
static void backup_complete(BlockJob *job, void *opaque)
{
BackupBlockJob *s = container_of(job, BackupBlockJob, common);
BackupCompleteData *data = opaque;
blk_unref(s->target);
s->target = NULL;
block_job_completed(job, data->ret);
g_free(data);
}
@ -537,7 +531,19 @@ static void coroutine_fn backup_run(void *opaque)
block_job_defer_to_main_loop(&job->common, backup_complete, data);
}
void backup_start(const char *job_id, BlockDriverState *bs,
static const BlockJobDriver backup_job_driver = {
.instance_size = sizeof(BackupBlockJob),
.job_type = BLOCK_JOB_TYPE_BACKUP,
.start = backup_run,
.set_speed = backup_set_speed,
.commit = backup_commit,
.abort = backup_abort,
.clean = backup_clean,
.attached_aio_context = backup_attached_aio_context,
.drain = backup_drain,
};
BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
BlockDriverState *target, int64_t speed,
MirrorSyncMode sync_mode, BdrvDirtyBitmap *sync_bitmap,
bool compress,
@ -557,52 +563,52 @@ void backup_start(const char *job_id, BlockDriverState *bs,
if (bs == target) {
error_setg(errp, "Source and target cannot be the same");
return;
return NULL;
}
if (!bdrv_is_inserted(bs)) {
error_setg(errp, "Device is not inserted: %s",
bdrv_get_device_name(bs));
return;
return NULL;
}
if (!bdrv_is_inserted(target)) {
error_setg(errp, "Device is not inserted: %s",
bdrv_get_device_name(target));
return;
return NULL;
}
if (compress && target->drv->bdrv_co_pwritev_compressed == NULL) {
error_setg(errp, "Compression is not supported for this drive %s",
bdrv_get_device_name(target));
return;
return NULL;
}
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
return;
return NULL;
}
if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_BACKUP_TARGET, errp)) {
return;
return NULL;
}
if (sync_mode == MIRROR_SYNC_MODE_INCREMENTAL) {
if (!sync_bitmap) {
error_setg(errp, "must provide a valid bitmap name for "
"\"incremental\" sync mode");
return;
return NULL;
}
/* Create a new bitmap, and freeze/disable this one. */
if (bdrv_dirty_bitmap_create_successor(bs, sync_bitmap, errp) < 0) {
return;
return NULL;
}
} else if (sync_bitmap) {
error_setg(errp,
"a sync_bitmap was provided to backup_run, "
"but received an incompatible sync_mode (%s)",
MirrorSyncMode_lookup[sync_mode]);
return;
return NULL;
}
len = bdrv_getlength(bs);
@ -648,17 +654,18 @@ void backup_start(const char *job_id, BlockDriverState *bs,
block_job_add_bdrv(&job->common, target);
job->common.len = len;
job->common.co = qemu_coroutine_create(backup_run, job);
block_job_txn_add_job(txn, &job->common);
qemu_coroutine_enter(job->common.co);
return;
return &job->common;
error:
if (sync_bitmap) {
bdrv_reclaim_dirty_bitmap(bs, sync_bitmap, NULL);
}
if (job) {
blk_unref(job->target);
backup_clean(&job->common);
block_job_unref(&job->common);
}
return NULL;
}

6
block/commit.c
View File

@ -205,6 +205,7 @@ static const BlockJobDriver commit_job_driver = {
.instance_size = sizeof(CommitBlockJob),
.job_type = BLOCK_JOB_TYPE_COMMIT,
.set_speed = commit_set_speed,
.start = commit_run,
};
void commit_start(const char *job_id, BlockDriverState *bs,
@ -288,10 +289,9 @@ void commit_start(const char *job_id, BlockDriverState *bs,
s->backing_file_str = g_strdup(backing_file_str);
s->on_error = on_error;
s->common.co = qemu_coroutine_create(commit_run, s);
trace_commit_start(bs, base, top, s, s->common.co);
qemu_coroutine_enter(s->common.co);
trace_commit_start(bs, base, top, s);
block_job_start(&s->common);
}

119
block/curl.c
View File

@ -68,12 +68,10 @@ static CURLMcode __curl_multi_socket_action(CURLM *multi_handle,
#endif
#define PROTOCOLS (CURLPROTO_HTTP | CURLPROTO_HTTPS | \
CURLPROTO_FTP | CURLPROTO_FTPS | \
CURLPROTO_TFTP)
CURLPROTO_FTP | CURLPROTO_FTPS)
#define CURL_NUM_STATES 8
#define CURL_NUM_ACB 8
#define SECTOR_SIZE 512
#define READ_AHEAD_DEFAULT (256 * 1024)
#define CURL_TIMEOUT_DEFAULT 5
#define CURL_TIMEOUT_MAX 10000
@ -105,12 +103,17 @@ typedef struct CURLAIOCB {
size_t end;
} CURLAIOCB;
typedef struct CURLSocket {
int fd;
QLIST_ENTRY(CURLSocket) next;
} CURLSocket;
typedef struct CURLState
{
struct BDRVCURLState *s;
CURLAIOCB *acb[CURL_NUM_ACB];
CURL *curl;
curl_socket_t sock_fd;
QLIST_HEAD(, CURLSocket) sockets;
char *orig_buf;
size_t buf_start;
size_t buf_off;
@ -164,10 +167,27 @@ static int curl_sock_cb(CURL *curl, curl_socket_t fd, int action,
{
BDRVCURLState *s;
CURLState *state = NULL;
CURLSocket *socket;
curl_easy_getinfo(curl, CURLINFO_PRIVATE, (char **)&state);
state->sock_fd = fd;
s = state->s;
QLIST_FOREACH(socket, &state->sockets, next) {
if (socket->fd == fd) {
if (action == CURL_POLL_REMOVE) {
QLIST_REMOVE(socket, next);
g_free(socket);
}
break;
}
}
if (!socket) {
socket = g_new0(CURLSocket, 1);
socket->fd = fd;
QLIST_INSERT_HEAD(&state->sockets, socket, next);
}
socket = NULL;
DPRINTF("CURL (AIO): Sock action %d on fd %d\n", action, (int)fd);
switch (action) {
case CURL_POLL_IN:
@ -213,12 +233,13 @@ static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
DPRINTF("CURL: Just reading %zd bytes\n", realsize);
if (!s || !s->orig_buf)
return 0;
if (!s || !s->orig_buf) {
goto read_end;
}
if (s->buf_off >= s->buf_len) {
/* buffer full, read nothing */
return 0;
goto read_end;
}
realsize = MIN(realsize, s->buf_len - s->buf_off);
memcpy(s->orig_buf + s->buf_off, ptr, realsize);
@ -231,15 +252,26 @@ static size_t curl_read_cb(void *ptr, size_t size, size_t nmemb, void *opaque)
continue;
if ((s->buf_off >= acb->end)) {
size_t request_length = acb->nb_sectors * BDRV_SECTOR_SIZE;
qemu_iovec_from_buf(acb->qiov, 0, s->orig_buf + acb->start,
acb->end - acb->start);
if (acb->end - acb->start < request_length) {
size_t offset = acb->end - acb->start;
qemu_iovec_memset(acb->qiov, offset, 0,
request_length - offset);
}
acb->common.cb(acb->common.opaque, 0);
qemu_aio_unref(acb);
s->acb[i] = NULL;
}
}
return realsize;
read_end:
/* curl will error out if we do not return this value */
return size * nmemb;
}
static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
@ -247,6 +279,8 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
{
int i;
size_t end = start + len;
size_t clamped_end = MIN(end, s->len);
size_t clamped_len = clamped_end - start;
for (i=0; i<CURL_NUM_STATES; i++) {
CURLState *state = &s->states[i];
@ -261,12 +295,15 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
// Does the existing buffer cover our section?
if ((start >= state->buf_start) &&
(start <= buf_end) &&
(end >= state->buf_start) &&
(end <= buf_end))
(clamped_end >= state->buf_start) &&
(clamped_end <= buf_end))
{
char *buf = state->orig_buf + (start - state->buf_start);
qemu_iovec_from_buf(acb->qiov, 0, buf, len);
qemu_iovec_from_buf(acb->qiov, 0, buf, clamped_len);
if (clamped_len < len) {
qemu_iovec_memset(acb->qiov, clamped_len, 0, len - clamped_len);
}
acb->common.cb(acb->common.opaque, 0);
return FIND_RET_OK;
@ -276,13 +313,13 @@ static int curl_find_buf(BDRVCURLState *s, size_t start, size_t len,
if (state->in_use &&
(start >= state->buf_start) &&
(start <= buf_fend) &&
(end >= state->buf_start) &&
(end <= buf_fend))
(clamped_end >= state->buf_start) &&
(clamped_end <= buf_fend))
{
int j;
acb->start = start - state->buf_start;
acb->end = acb->start + len;
acb->end = acb->start + clamped_len;
for (j=0; j<CURL_NUM_ACB; j++) {
if (!state->acb[j]) {
@ -352,6 +389,7 @@ static void curl_multi_check_completion(BDRVCURLState *s)
static void curl_multi_do(void *arg)
{
CURLState *s = (CURLState *)arg;
CURLSocket *socket, *next_socket;
int running;
int r;
@ -359,10 +397,13 @@ static void curl_multi_do(void *arg)
return;
}
do {
r = curl_multi_socket_action(s->s->multi, s->sock_fd, 0, &running);
} while(r == CURLM_CALL_MULTI_PERFORM);
/* Need to use _SAFE because curl_multi_socket_action() may trigger
* curl_sock_cb() which might modify this list */
QLIST_FOREACH_SAFE(socket, &s->sockets, next, next_socket) {
do {
r = curl_multi_socket_action(s->s->multi, socket->fd, 0, &running);
} while (r == CURLM_CALL_MULTI_PERFORM);
}
}
static void curl_multi_read(void *arg)
@ -466,6 +507,7 @@ static CURLState *curl_init_state(BlockDriverState *bs, BDRVCURLState *s)
#endif
}
QLIST_INIT(&state->sockets);
state->s = s;
return state;
@ -475,6 +517,14 @@ static void curl_clean_state(CURLState *s)
{
if (s->s->multi)
curl_multi_remove_handle(s->s->multi, s->curl);
while (!QLIST_EMPTY(&s->sockets)) {
CURLSocket *socket = QLIST_FIRST(&s->sockets);
QLIST_REMOVE(socket, next);
g_free(socket);
}
s->in_use = 0;
}
@ -738,12 +788,12 @@ static void curl_readv_bh_cb(void *p)
CURLAIOCB *acb = p;
BDRVCURLState *s = acb->common.bs->opaque;
size_t start = acb->sector_num * SECTOR_SIZE;
size_t start = acb->sector_num * BDRV_SECTOR_SIZE;
size_t end;
// In case we have the requested data already (e.g. read-ahead),
// we can just call the callback and be done.
switch (curl_find_buf(s, start, acb->nb_sectors * SECTOR_SIZE, acb)) {
switch (curl_find_buf(s, start, acb->nb_sectors * BDRV_SECTOR_SIZE, acb)) {
case FIND_RET_OK:
qemu_aio_unref(acb);
// fall through
@ -762,13 +812,13 @@ static void curl_readv_bh_cb(void *p)
}
acb->start = 0;
acb->end = (acb->nb_sectors * SECTOR_SIZE);
acb->end = MIN(acb->nb_sectors * BDRV_SECTOR_SIZE, s->len - start);
state->buf_off = 0;
g_free(state->orig_buf);
state->buf_start = start;
state->buf_len = acb->end + s->readahead_size;
end = MIN(start + state->buf_len, s->len) - 1;
state->buf_len = MIN(acb->end + s->readahead_size, s->len - start);
end = start + state->buf_len - 1;
state->orig_buf = g_try_malloc(state->buf_len);
if (state->buf_len && state->orig_buf == NULL) {
curl_clean_state(state);
@ -779,8 +829,8 @@ static void curl_readv_bh_cb(void *p)
state->acb[0] = acb;
snprintf(state->range, 127, "%zd-%zd", start, end);
DPRINTF("CURL (AIO): Reading %d at %zd (%s)\n",
(acb->nb_sectors * SECTOR_SIZE), start, state->range);
DPRINTF("CURL (AIO): Reading %llu at %zd (%s)\n",
(acb->nb_sectors * BDRV_SECTOR_SIZE), start, state->range);
curl_easy_setopt(state->curl, CURLOPT_RANGE, state->range);
curl_multi_add_handle(s->multi, state->curl);
@ -886,29 +936,12 @@ static BlockDriver bdrv_ftps = {
.bdrv_attach_aio_context = curl_attach_aio_context,
};
static BlockDriver bdrv_tftp = {
.format_name = "tftp",
.protocol_name = "tftp",
.instance_size = sizeof(BDRVCURLState),
.bdrv_parse_filename = curl_parse_filename,
.bdrv_file_open = curl_open,
.bdrv_close = curl_close,
.bdrv_getlength = curl_getlength,
.bdrv_aio_readv = curl_aio_readv,
.bdrv_detach_aio_context = curl_detach_aio_context,
.bdrv_attach_aio_context = curl_attach_aio_context,
};
static void curl_block_init(void)
{
bdrv_register(&bdrv_http);
bdrv_register(&bdrv_https);
bdrv_register(&bdrv_ftp);
bdrv_register(&bdrv_ftps);
bdrv_register(&bdrv_tftp);
}
block_init(curl_block_init);

47
block/mirror.c
View File

@ -615,6 +615,20 @@ static int coroutine_fn mirror_dirty_init(MirrorBlockJob *s)
return 0;
}
/* Called when going out of the streaming phase to flush the bulk of the
* data to the medium, or just before completing.
*/
static int mirror_flush(MirrorBlockJob *s)
{
int ret = blk_flush(s->target);
if (ret < 0) {
if (mirror_error_action(s, false, -ret) == BLOCK_ERROR_ACTION_REPORT) {
s->ret = ret;
}
}
return ret;
}
static void coroutine_fn mirror_run(void *opaque)
{
MirrorBlockJob *s = opaque;
@ -727,27 +741,23 @@ static void coroutine_fn mirror_run(void *opaque)
should_complete = false;
if (s->in_flight == 0 && cnt == 0) {
trace_mirror_before_flush(s);
ret = blk_flush(s->target);
if (ret < 0) {
if (mirror_error_action(s, false, -ret) ==
BLOCK_ERROR_ACTION_REPORT) {
goto immediate_exit;
if (!s->synced) {
if (mirror_flush(s) < 0) {
/* Go check s->ret. */
continue;
}
} else {
/* We're out of the streaming phase. From now on, if the job
* is cancelled we will actually complete all pending I/O and
* report completion. This way, block-job-cancel will leave
* the target in a consistent state.
*/
if (!s->synced) {
block_job_event_ready(&s->common);
s->synced = true;
}
should_complete = s->should_complete ||
block_job_is_cancelled(&s->common);
cnt = bdrv_get_dirty_count(s->dirty_bitmap);
block_job_event_ready(&s->common);
s->synced = true;
}
should_complete = s->should_complete ||
block_job_is_cancelled(&s->common);
cnt = bdrv_get_dirty_count(s->dirty_bitmap);
}
if (cnt == 0 && should_complete) {
@ -765,7 +775,7 @@ static void coroutine_fn mirror_run(void *opaque)
bdrv_drained_begin(bs);
cnt = bdrv_get_dirty_count(s->dirty_bitmap);
if (cnt > 0) {
if (cnt > 0 || mirror_flush(s) < 0) {
bdrv_drained_end(bs);
continue;
}
@ -920,6 +930,7 @@ static const BlockJobDriver mirror_job_driver = {
.instance_size = sizeof(MirrorBlockJob),
.job_type = BLOCK_JOB_TYPE_MIRROR,
.set_speed = mirror_set_speed,
.start = mirror_run,
.complete = mirror_complete,
.pause = mirror_pause,
.attached_aio_context = mirror_attached_aio_context,
@ -930,6 +941,7 @@ static const BlockJobDriver commit_active_job_driver = {
.instance_size = sizeof(MirrorBlockJob),
.job_type = BLOCK_JOB_TYPE_COMMIT,
.set_speed = mirror_set_speed,
.start = mirror_run,
.complete = mirror_complete,
.pause = mirror_pause,
.attached_aio_context = mirror_attached_aio_context,
@ -1007,9 +1019,8 @@ static void mirror_start_job(const char *job_id, BlockDriverState *bs,
}
}
s->common.co = qemu_coroutine_create(mirror_run, s);
trace_mirror_start(bs, s, s->common.co, opaque);
qemu_coroutine_enter(s->common.co);
trace_mirror_start(bs, s, opaque);
block_job_start(&s->common);
}
void mirror_start(const char *job_id, BlockDriverState *bs,

12
block/replication.c
View File

@ -421,6 +421,7 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode,
int64_t active_length, hidden_length, disk_length;
AioContext *aio_context;
Error *local_err = NULL;
BlockJob *job;
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
@ -508,17 +509,18 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode,
bdrv_op_block_all(top_bs, s->blocker);
bdrv_op_unblock(top_bs, BLOCK_OP_TYPE_DATAPLANE, s->blocker);
backup_start(NULL, s->secondary_disk->bs, s->hidden_disk->bs, 0,
MIRROR_SYNC_MODE_NONE, NULL, false,
BLOCKDEV_ON_ERROR_REPORT, BLOCKDEV_ON_ERROR_REPORT,
BLOCK_JOB_INTERNAL, backup_job_completed, bs,
NULL, &local_err);
job = backup_job_create(NULL, s->secondary_disk->bs, s->hidden_disk->bs,
0, MIRROR_SYNC_MODE_NONE, NULL, false,
BLOCKDEV_ON_ERROR_REPORT,
BLOCKDEV_ON_ERROR_REPORT, BLOCK_JOB_INTERNAL,
backup_job_completed, bs, NULL, &local_err);
if (local_err) {
error_propagate(errp, local_err);
backup_job_cleanup(bs);
aio_context_release(aio_context);
return;
}
block_job_start(job);
break;
default:
aio_context_release(aio_context);

6
block/stream.c
View File

@ -218,6 +218,7 @@ static const BlockJobDriver stream_job_driver = {
.instance_size = sizeof(StreamBlockJob),
.job_type = BLOCK_JOB_TYPE_STREAM,
.set_speed = stream_set_speed,
.start = stream_run,
};
void stream_start(const char *job_id, BlockDriverState *bs,
@ -254,7 +255,6 @@ void stream_start(const char *job_id, BlockDriverState *bs,
s->bs_flags = orig_bs_flags;
s->on_error = on_error;
s->common.co = qemu_coroutine_create(stream_run, s);
trace_stream_start(bs, base, s, s->common.co);
qemu_coroutine_enter(s->common.co);
trace_stream_start(bs, base, s);
block_job_start(&s->common);
}

6
block/trace-events
View File

@ -19,14 +19,14 @@ bdrv_co_do_copy_on_readv(void *bs, int64_t offset, unsigned int bytes, int64_t c
# block/stream.c
stream_one_iteration(void *s, int64_t sector_num, int nb_sectors, int is_allocated) "s %p sector_num %"PRId64" nb_sectors %d is_allocated %d"
stream_start(void *bs, void *base, void *s, void *co) "bs %p base %p s %p co %p"
stream_start(void *bs, void *base, void *s) "bs %p base %p s %p"
# block/commit.c
commit_one_iteration(void *s, int64_t sector_num, int nb_sectors, int is_allocated) "s %p sector_num %"PRId64" nb_sectors %d is_allocated %d"
commit_start(void *bs, void *base, void *top, void *s, void *co) "bs %p base %p top %p s %p co %p"
commit_start(void *bs, void *base, void *top, void *s) "bs %p base %p top %p s %p"
# block/mirror.c
mirror_start(void *bs, void *s, void *co, void *opaque) "bs %p s %p co %p opaque %p"
mirror_start(void *bs, void *s, void *opaque) "bs %p s %p opaque %p"
mirror_restart_iter(void *s, int64_t cnt) "s %p dirty count %"PRId64
mirror_before_flush(void *s) "s %p"
mirror_before_drain(void *s, int64_t cnt) "s %p dirty count %"PRId64

81
blockdev.c
View File

@ -1811,7 +1811,7 @@ typedef struct DriveBackupState {
BlockJob *job;
} DriveBackupState;
static void do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
Error **errp);
static void drive_backup_prepare(BlkActionState *common, Error **errp)
@ -1835,23 +1835,26 @@ static void drive_backup_prepare(BlkActionState *common, Error **errp)
bdrv_drained_begin(bs);
state->bs = bs;
do_drive_backup(backup, common->block_job_txn, &local_err);
state->job = do_drive_backup(backup, common->block_job_txn, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
state->job = state->bs->job;
static void drive_backup_commit(BlkActionState *common)
{
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
assert(state->job);
block_job_start(state->job);
}
static void drive_backup_abort(BlkActionState *common)
{
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
BlockDriverState *bs = state->bs;
/* Only cancel if it's the job we started */
if (bs && bs->job && bs->job == state->job) {
block_job_cancel_sync(bs->job);
if (state->job) {
block_job_cancel_sync(state->job);
}
}
@ -1872,8 +1875,8 @@ typedef struct BlockdevBackupState {
AioContext *aio_context;
} BlockdevBackupState;
static void do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
Error **errp);
static BlockJob *do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
Error **errp);
static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
{
@ -1906,23 +1909,26 @@ static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
state->bs = bs;
bdrv_drained_begin(state->bs);
do_blockdev_backup(backup, common->block_job_txn, &local_err);
state->job = do_blockdev_backup(backup, common->block_job_txn, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
}
state->job = state->bs->job;
static void blockdev_backup_commit(BlkActionState *common)
{
BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
assert(state->job);
block_job_start(state->job);
}
static void blockdev_backup_abort(BlkActionState *common)
{
BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
BlockDriverState *bs = state->bs;
/* Only cancel if it's the job we started */
if (bs && bs->job && bs->job == state->job) {
block_job_cancel_sync(bs->job);
if (state->job) {
block_job_cancel_sync(state->job);
}
}
@ -2072,12 +2078,14 @@ static const BlkActionOps actions[] = {
[TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
.instance_size = sizeof(DriveBackupState),
.prepare = drive_backup_prepare,
.commit = drive_backup_commit,
.abort = drive_backup_abort,
.clean = drive_backup_clean,
},
[TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
.instance_size = sizeof(BlockdevBackupState),
.prepare = blockdev_backup_prepare,
.commit = blockdev_backup_commit,
.abort = blockdev_backup_abort,
.clean = blockdev_backup_clean,
},
@ -3106,11 +3114,13 @@ out:
aio_context_release(aio_context);
}
static void do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, Error **errp)
static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
Error **errp)
{
BlockDriverState *bs;
BlockDriverState *target_bs;
BlockDriverState *source = NULL;
BlockJob *job = NULL;
BdrvDirtyBitmap *bmap = NULL;
AioContext *aio_context;
QDict *options = NULL;
@ -3139,7 +3149,7 @@ static void do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, Error **errp)
bs = qmp_get_root_bs(backup->device, errp);
if (!bs) {
return;
return NULL;
}
aio_context = bdrv_get_aio_context(bs);
@ -3213,10 +3223,10 @@ static void do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, Error **errp)
}
}
backup_start(backup->job_id, bs, target_bs, backup->speed, backup->sync,
bmap, backup->compress, backup->on_source_error,
backup->on_target_error, BLOCK_JOB_DEFAULT,
NULL, NULL, txn, &local_err);
job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
backup->sync, bmap, backup->compress,
backup->on_source_error, backup->on_target_error,
BLOCK_JOB_DEFAULT, NULL, NULL, txn, &local_err);
bdrv_unref(target_bs);
if (local_err != NULL) {
error_propagate(errp, local_err);
@ -3225,11 +3235,17 @@ static void do_drive_backup(DriveBackup *backup, BlockJobTxn *txn, Error **errp)
out:
aio_context_release(aio_context);
return job;
}
void qmp_drive_backup(DriveBackup *arg, Error **errp)
{
return do_drive_backup(arg, NULL, errp);
BlockJob *job;
job = do_drive_backup(arg, NULL, errp);
if (job) {
block_job_start(job);
}
}
BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
@ -3237,12 +3253,14 @@ BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
return bdrv_named_nodes_list(errp);
}
void do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn, Error **errp)
BlockJob *do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
Error **errp)
{
BlockDriverState *bs;
BlockDriverState *target_bs;
Error *local_err = NULL;
AioContext *aio_context;
BlockJob *job = NULL;
if (!backup->has_speed) {
backup->speed = 0;
@ -3262,7 +3280,7 @@ void do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn, Error **errp)
bs = qmp_get_root_bs(backup->device, errp);
if (!bs) {
return;
return NULL;
}
aio_context = bdrv_get_aio_context(bs);
@ -3284,20 +3302,25 @@ void do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn, Error **errp)
goto out;
}
}
backup_start(backup->job_id, bs, target_bs, backup->speed, backup->sync,
NULL, backup->compress, backup->on_source_error,
backup->on_target_error, BLOCK_JOB_DEFAULT,
NULL, NULL, txn, &local_err);
job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
backup->sync, NULL, backup->compress,
backup->on_source_error, backup->on_target_error,
BLOCK_JOB_DEFAULT, NULL, NULL, txn, &local_err);
if (local_err != NULL) {
error_propagate(errp, local_err);
}
out:
aio_context_release(aio_context);
return job;
}
void qmp_blockdev_backup(BlockdevBackup *arg, Error **errp)
{
do_blockdev_backup(arg, NULL, errp);
BlockJob *job;
job = do_blockdev_backup(arg, NULL, errp);
if (job) {
block_job_start(job);
}
}
/* Parameter check and block job starting for drive mirroring.

58
blockjob.c
View File

@ -174,7 +174,9 @@ void *block_job_create(const char *job_id, const BlockJobDriver *driver,
job->blk = blk;
job->cb = cb;
job->opaque = opaque;
job->busy = true;
job->busy = false;
job->paused = true;
job->pause_count = 1;
job->refcnt = 1;
bs->job = job;
@ -202,6 +204,23 @@ bool block_job_is_internal(BlockJob *job)
return (job->id == NULL);
}
static bool block_job_started(BlockJob *job)
{
return job->co;
}
void block_job_start(BlockJob *job)
{
assert(job && !block_job_started(job) && job->paused &&
!job->busy && job->driver->start);
job->co = qemu_coroutine_create(job->driver->start, job);
if (--job->pause_count == 0) {
job->paused = false;
job->busy = true;
qemu_coroutine_enter(job->co);
}
}
void block_job_ref(BlockJob *job)
{
++job->refcnt;
@ -241,21 +260,29 @@ static void block_job_completed_single(BlockJob *job)
job->driver->abort(job);
}
}
if (job->driver->clean) {
job->driver->clean(job);
}
if (job->cb) {
job->cb(job->opaque, job->ret);
}
if (block_job_is_cancelled(job)) {
block_job_event_cancelled(job);
} else {
const char *msg = NULL;
if (job->ret < 0) {
msg = strerror(-job->ret);
/* Emit events only if we actually started */
if (block_job_started(job)) {
if (block_job_is_cancelled(job)) {
block_job_event_cancelled(job);
} else {
const char *msg = NULL;
if (job->ret < 0) {
msg = strerror(-job->ret);
}
block_job_event_completed(job, msg);
}
block_job_event_completed(job, msg);
}
if (job->txn) {
QLIST_REMOVE(job, txn_list);
block_job_txn_unref(job->txn);
}
block_job_unref(job);
@ -359,7 +386,8 @@ void block_job_complete(BlockJob *job, Error **errp)
{
/* Should not be reachable via external interface for internal jobs */
assert(job->id);
if (job->pause_count || job->cancelled || !job->driver->complete) {
if (job->pause_count || job->cancelled ||
!block_job_started(job) || !job->driver->complete) {
error_setg(errp, "The active block job '%s' cannot be completed",
job->id);
return;
@ -391,6 +419,8 @@ bool block_job_user_paused(BlockJob *job)
void coroutine_fn block_job_pause_point(BlockJob *job)
{
assert(job && block_job_started(job));
if (!block_job_should_pause(job)) {
return;
}
@ -442,9 +472,13 @@ void block_job_enter(BlockJob *job)
void block_job_cancel(BlockJob *job)
{
job->cancelled = true;
block_job_iostatus_reset(job);
block_job_enter(job);
if (block_job_started(job)) {
job->cancelled = true;
block_job_iostatus_reset(job);
block_job_enter(job);
} else {
block_job_completed(job, -ECANCELED);
}
}
bool block_job_is_cancelled(BlockJob *job)

2
docs/qmp-commands.txt
View File

@ -1803,7 +1803,7 @@ Each json-object contain the following:
"file", "file", "ftp", "ftps", "host_cdrom",
"host_device", "http", "https",
"nbd", "parallels", "qcow", "qcow2", "raw",
"tftp", "vdi", "vmdk", "vpc", "vvfat"
"vdi", "vmdk", "vpc", "vvfat"
- "backing_file": backing file name (json-string, optional)
- "backing_file_depth": number of files in the backing file chain (json-int)
- "encrypted": true if encrypted, false otherwise (json-bool)

23
include/block/block_int.h
View File

@ -748,7 +748,7 @@ void mirror_start(const char *job_id, BlockDriverState *bs,
bool unmap, Error **errp);
/*
* backup_start:
* backup_job_create:
* @job_id: The id of the newly-created job, or %NULL to use the
* device name of @bs.
* @bs: Block device to operate on.
@ -764,18 +764,19 @@ void mirror_start(const char *job_id, BlockDriverState *bs,
* @opaque: Opaque pointer value passed to @cb.
* @txn: Transaction that this job is part of (may be NULL).
*
* Start a backup operation on @bs. Clusters in @bs are written to @target
* Create a backup operation on @bs. Clusters in @bs are written to @target
* until the job is cancelled or manually completed.
*/
void backup_start(const char *job_id, BlockDriverState *bs,
BlockDriverState *target, int64_t speed,
MirrorSyncMode sync_mode, BdrvDirtyBitmap *sync_bitmap,
bool compress,
BlockdevOnError on_source_error,
BlockdevOnError on_target_error,
int creation_flags,
BlockCompletionFunc *cb, void *opaque,
BlockJobTxn *txn, Error **errp);
BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
BlockDriverState *target, int64_t speed,
MirrorSyncMode sync_mode,
BdrvDirtyBitmap *sync_bitmap,
bool compress,
BlockdevOnError on_source_error,
BlockdevOnError on_target_error,
int creation_flags,
BlockCompletionFunc *cb, void *opaque,
BlockJobTxn *txn, Error **errp);
void hmp_drive_add_node(Monitor *mon, const char *optstr);

9
include/block/blockjob.h
View File

@ -188,6 +188,15 @@ void block_job_add_bdrv(BlockJob *job, BlockDriverState *bs);
*/
void block_job_set_speed(BlockJob *job, int64_t speed, Error **errp);
/**
* block_job_start:
* @job: A job that has not yet been started.
*
* Begins execution of a block job.
* Takes ownership of one reference to the job object.
*/
void block_job_start(BlockJob *job);
/**
* block_job_cancel:
* @job: The job to be canceled.

11
include/block/blockjob_int.h
View File

@ -47,6 +47,9 @@ struct BlockJobDriver {
/** Optional callback for job types that need to forward I/O status reset */
void (*iostatus_reset)(BlockJob *job);
/** Mandatory: Entrypoint for the Coroutine. */
CoroutineEntry *start;
/**
* Optional callback for job types whose completion must be triggered
* manually.
@ -73,6 +76,14 @@ struct BlockJobDriver {
*/
void (*abort)(BlockJob *job);
/**
* If the callback is not NULL, it will be invoked after a call to either
* .commit() or .abort(). Regardless of which callback is invoked after
* completion, .clean() will always be called, even if the job does not
* belong to a transaction group.
*/
void (*clean)(BlockJob *job);
/**
* If the callback is not NULL, it will be invoked when the job transitions
* into the paused state. Paused jobs must not perform any asynchronous

7
qapi/block-core.json
View File

@ -243,12 +243,12 @@
# 0.14.0 this can be: 'blkdebug', 'bochs', 'cloop', 'cow', 'dmg',
# 'file', 'file', 'ftp', 'ftps', 'host_cdrom', 'host_device',
# 'http', 'https', 'luks', 'nbd', 'parallels', 'qcow',
# 'qcow2', 'raw', 'tftp', 'vdi', 'vmdk', 'vpc', 'vvfat'
# 'qcow2', 'raw', 'vdi', 'vmdk', 'vpc', 'vvfat'
# 2.2: 'archipelago' added, 'cow' dropped
# 2.3: 'host_floppy' deprecated
# 2.5: 'host_floppy' dropped
# 2.6: 'luks' added
# 2.8: 'replication' added
# 2.8: 'replication' added, 'tftp' dropped
#
# @backing_file: #optional the name of the backing file (for copy-on-write)
#
@ -1723,7 +1723,7 @@
'dmg', 'file', 'ftp', 'ftps', 'gluster', 'host_cdrom',
'host_device', 'http', 'https', 'luks', 'nbd', 'nfs', 'null-aio',
'null-co', 'parallels', 'qcow', 'qcow2', 'qed', 'quorum', 'raw',
'replication', 'ssh', 'tftp', 'vdi', 'vhdx', 'vmdk', 'vpc',
'replication', 'ssh', 'vdi', 'vhdx', 'vmdk', 'vpc',
'vvfat' ] }
##
@ -2410,7 +2410,6 @@
'replication':'BlockdevOptionsReplication',
# TODO sheepdog: Wait for structured options
'ssh': 'BlockdevOptionsSsh',
'tftp': 'BlockdevOptionsCurl',
'vdi': 'BlockdevOptionsGenericFormat',
'vhdx': 'BlockdevOptionsGenericFormat',
'vmdk': 'BlockdevOptionsGenericCOWFormat',

6
qemu-options.hx
View File

@ -2606,8 +2606,8 @@ qemu-system-x86_64 --drive file=gluster://192.0.2.1/testvol/a.img
See also @url{http://www.gluster.org}.
@item HTTP/HTTPS/FTP/FTPS/TFTP
QEMU supports read-only access to files accessed over http(s), ftp(s) and tftp.
@item HTTP/HTTPS/FTP/FTPS
QEMU supports read-only access to files accessed over http(s) and ftp(s).
Syntax using a single filename:
@example
@ -2617,7 +2617,7 @@ Syntax using a single filename:
where:
@table @option
@item protocol
'http', 'https', 'ftp', 'ftps', or 'tftp'.
'http', 'https', 'ftp', or 'ftps'.
@item username
Optional username for authentication to the remote server.

3
tests/qemu-iotests/109
View File

@ -62,6 +62,9 @@ function run_qemu()
"return"
_send_qemu_cmd $QEMU_HANDLE '' "$qmp_event"
if test "$qmp_event" = BLOCK_JOB_ERROR; then
_send_qemu_cmd $QEMU_HANDLE '' "BLOCK_JOB_COMPLETED"
fi
_send_qemu_cmd $QEMU_HANDLE '{"execute":"query-block-jobs"}' "return"
_cleanup_qemu
}

53
tests/qemu-iotests/124
View File

@ -395,19 +395,7 @@ class TestIncrementalBackup(TestIncrementalBackupBase):
self.check_backups()
def test_transaction_failure(self):
'''Test: Verify backups made from a transaction that partially fails.
Add a second drive with its own unique pattern, and add a bitmap to each
drive. Use blkdebug to interfere with the backup on just one drive and
attempt to create a coherent incremental backup across both drives.
verify a failure in one but not both, then delete the failed stubs and
re-run the same transaction.
verify that both incrementals are created successfully.
'''
def do_transaction_failure_test(self, race=False):
# Create a second drive, with pattern:
drive1 = self.add_node('drive1')
self.img_create(drive1['file'], drive1['fmt'])
@ -451,9 +439,10 @@ class TestIncrementalBackup(TestIncrementalBackupBase):
self.assertFalse(self.vm.get_qmp_events(wait=False))
# Emulate some writes
self.hmp_io_writes(drive0['id'], (('0xab', 0, 512),
('0xfe', '16M', '256k'),
('0x64', '32736k', '64k')))
if not race:
self.hmp_io_writes(drive0['id'], (('0xab', 0, 512),
('0xfe', '16M', '256k'),
('0x64', '32736k', '64k')))
self.hmp_io_writes(drive1['id'], (('0xba', 0, 512),
('0xef', '16M', '256k'),
('0x46', '32736k', '64k')))
@ -463,7 +452,8 @@ class TestIncrementalBackup(TestIncrementalBackupBase):
target1 = self.prepare_backup(dr1bm0)
# Ask for a new incremental backup per-each drive,
# expecting drive1's backup to fail:
# expecting drive1's backup to fail. In the 'race' test,
# we expect drive1 to attempt to cancel the empty drive0 job.
transaction = [
transaction_drive_backup(drive0['id'], target0, sync='incremental',
format=drive0['fmt'], mode='existing',
@ -488,9 +478,15 @@ class TestIncrementalBackup(TestIncrementalBackupBase):
self.assert_no_active_block_jobs()
# Delete drive0's successful target and eliminate our record of the
# unsuccessful drive1 target. Then re-run the same transaction.
# unsuccessful drive1 target.
dr0bm0.del_target()
dr1bm0.del_target()
if race:
# Don't re-run the transaction, we only wanted to test the race.
self.vm.shutdown()
return
# Re-run the same transaction:
target0 = self.prepare_backup(dr0bm0)
target1 = self.prepare_backup(dr1bm0)
@ -511,6 +507,27 @@ class TestIncrementalBackup(TestIncrementalBackupBase):
self.vm.shutdown()
self.check_backups()
def test_transaction_failure(self):
'''Test: Verify backups made from a transaction that partially fails.
Add a second drive with its own unique pattern, and add a bitmap to each
drive. Use blkdebug to interfere with the backup on just one drive and
attempt to create a coherent incremental backup across both drives.
verify a failure in one but not both, then delete the failed stubs and
re-run the same transaction.
verify that both incrementals are created successfully.
'''
self.do_transaction_failure_test()
def test_transaction_failure_race(self):
'''Test: Verify that transactions with jobs that have no data to
transfer do not cause race conditions in the cancellation of the entire
transaction job group.
'''
self.do_transaction_failure_test(race=True)
def test_sync_dirty_bitmap_missing(self):
self.assert_no_active_block_jobs()

4
tests/qemu-iotests/124.out
View File

@ -1,5 +1,5 @@
..........
...........
----------------------------------------------------------------------
Ran 10 tests
Ran 11 tests
OK

12
tests/test-blockjob-txn.c
View File

@ -24,10 +24,6 @@ typedef struct {
int *result;
} TestBlockJob;
static const BlockJobDriver test_block_job_driver = {
.instance_size = sizeof(TestBlockJob),
};
static void test_block_job_complete(BlockJob *job, void *opaque)
{
BlockDriverState *bs = blk_bs(job->blk);
@ -77,6 +73,11 @@ static void test_block_job_cb(void *opaque, int ret)
g_free(data);
}
static const BlockJobDriver test_block_job_driver = {
.instance_size = sizeof(TestBlockJob),
.start = test_block_job_run,
};
/* Create a block job that completes with a given return code after a given
* number of event loop iterations. The return code is stored in the given
* result pointer.
@ -104,10 +105,9 @@ static BlockJob *test_block_job_start(unsigned int iterations,
s->use_timer = use_timer;
s->rc = rc;
s->result = result;
s->common.co = qemu_coroutine_create(test_block_job_run, s);
data->job = s;
data->result = result;
qemu_coroutine_enter(s->common.co);
block_job_start(&s->common);
return &s->common;
}