*/
#include "qemu/osdep.h"
-#include "qemu-common.h"
+#include "qemu/option.h"
#include "block/nbd.h"
#include "block/blockjob.h"
#include "block/block_int.h"
#include "qapi/error.h"
#include "replication.h"
+typedef enum {
+ BLOCK_REPLICATION_NONE, /* block replication is not started */
+ BLOCK_REPLICATION_RUNNING, /* block replication is running */
+ BLOCK_REPLICATION_FAILOVER, /* failover is running in background */
+ BLOCK_REPLICATION_FAILOVER_FAILED, /* failover failed */
+ BLOCK_REPLICATION_DONE, /* block replication is done */
+} ReplicationStage;
+
typedef struct BDRVReplicationState {
ReplicationMode mode;
- int replication_state;
+ ReplicationStage stage;
BdrvChild *active_disk;
BdrvChild *hidden_disk;
BdrvChild *secondary_disk;
int error;
} BDRVReplicationState;
-enum {
- BLOCK_REPLICATION_NONE, /* block replication is not started */
- BLOCK_REPLICATION_RUNNING, /* block replication is running */
- BLOCK_REPLICATION_FAILOVER, /* failover is running in background */
- BLOCK_REPLICATION_FAILOVER_FAILED, /* failover failed */
- BLOCK_REPLICATION_DONE, /* block replication is done */
-};
-
static void replication_start(ReplicationState *rs, ReplicationMode mode,
Error **errp);
static void replication_do_checkpoint(ReplicationState *rs, Error **errp);
{
BDRVReplicationState *s = bs->opaque;
- if (s->replication_state == BLOCK_REPLICATION_RUNNING) {
+ if (s->stage == BLOCK_REPLICATION_RUNNING) {
replication_stop(s->rs, false, NULL);
}
- if (s->replication_state == BLOCK_REPLICATION_FAILOVER) {
+ if (s->stage == BLOCK_REPLICATION_FAILOVER) {
block_job_cancel_sync(s->active_disk->bs->job);
}
replication_remove(s->rs);
}
+static void replication_child_perm(BlockDriverState *bs, BdrvChild *c,
+ const BdrvChildRole *role,
+ BlockReopenQueue *reopen_queue,
+ uint64_t perm, uint64_t shared,
+ uint64_t *nperm, uint64_t *nshared)
+{
+ *nperm = BLK_PERM_CONSISTENT_READ;
+ if ((bs->open_flags & (BDRV_O_INACTIVE | BDRV_O_RDWR)) == BDRV_O_RDWR) {
+ *nperm |= BLK_PERM_WRITE;
+ }
+ *nshared = BLK_PERM_CONSISTENT_READ \
+ | BLK_PERM_WRITE \
+ | BLK_PERM_WRITE_UNCHANGED;
+ return;
+}
+
static int64_t replication_getlength(BlockDriverState *bs)
{
return bdrv_getlength(bs->file->bs);
static int replication_get_io_status(BDRVReplicationState *s)
{
- switch (s->replication_state) {
+ switch (s->stage) {
case BLOCK_REPLICATION_NONE:
return -EIO;
case BLOCK_REPLICATION_RUNNING:
}
if (job) {
- backup_wait_for_overlapping_requests(child->bs->job, sector_num,
- remaining_sectors);
- backup_cow_request_begin(&req, child->bs->job, sector_num,
- remaining_sectors);
+ uint64_t remaining_bytes = remaining_sectors * BDRV_SECTOR_SIZE;
+
+ backup_wait_for_overlapping_requests(child->bs->job,
+ sector_num * BDRV_SECTOR_SIZE,
+ remaining_bytes);
+ backup_cow_request_begin(&req, child->bs->job,
+ sector_num * BDRV_SECTOR_SIZE,
+ remaining_bytes);
ret = bdrv_co_readv(bs->file, sector_num, remaining_sectors,
qiov);
backup_cow_request_end(&req);
BdrvChild *top = bs->file;
BdrvChild *base = s->secondary_disk;
BdrvChild *target;
- int ret, n;
+ int ret;
+ int64_t n;
ret = replication_get_io_status(s);
if (ret < 0) {
*/
qemu_iovec_init(&hd_qiov, qiov->niov);
while (remaining_sectors > 0) {
- ret = bdrv_is_allocated_above(top->bs, base->bs, sector_num,
- remaining_sectors, &n);
+ int64_t count;
+
+ ret = bdrv_is_allocated_above(top->bs, base->bs,
+ sector_num * BDRV_SECTOR_SIZE,
+ remaining_sectors * BDRV_SECTOR_SIZE,
+ &count);
if (ret < 0) {
goto out1;
}
+ assert(QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE));
+ n = count >> BDRV_SECTOR_BITS;
qemu_iovec_reset(&hd_qiov);
- qemu_iovec_concat(&hd_qiov, qiov, bytes_done, n * BDRV_SECTOR_SIZE);
+ qemu_iovec_concat(&hd_qiov, qiov, bytes_done, count);
target = ret ? top : base;
ret = bdrv_co_writev(target, sector_num, n, &hd_qiov);
remaining_sectors -= n;
sector_num += n;
- bytes_done += n * BDRV_SECTOR_SIZE;
+ bytes_done += count;
}
out1:
return;
}
+ if (!s->active_disk->bs->drv) {
+ error_setg(errp, "Active disk %s is ejected",
+ s->active_disk->bs->node_name);
+ return;
+ }
+
ret = s->active_disk->bs->drv->bdrv_make_empty(s->active_disk->bs);
if (ret < 0) {
error_setg(errp, "Cannot make active disk empty");
return;
}
+ if (!s->hidden_disk->bs->drv) {
+ error_setg(errp, "Hidden disk %s is ejected",
+ s->hidden_disk->bs->node_name);
+ return;
+ }
+
ret = s->hidden_disk->bs->drv->bdrv_make_empty(s->hidden_disk->bs);
if (ret < 0) {
error_setg(errp, "Cannot make hidden disk empty");
new_secondary_flags = s->orig_secondary_flags;
}
+ bdrv_subtree_drained_begin(s->hidden_disk->bs);
+ bdrv_subtree_drained_begin(s->secondary_disk->bs);
+
if (orig_hidden_flags != new_hidden_flags) {
reopen_queue = bdrv_reopen_queue(reopen_queue, s->hidden_disk->bs, NULL,
new_hidden_flags);
reopen_queue, &local_err);
error_propagate(errp, local_err);
}
+
+ bdrv_subtree_drained_end(s->hidden_disk->bs);
+ bdrv_subtree_drained_end(s->secondary_disk->bs);
}
static void backup_job_cleanup(BlockDriverState *bs)
BlockDriverState *bs = opaque;
BDRVReplicationState *s = bs->opaque;
- if (s->replication_state != BLOCK_REPLICATION_FAILOVER) {
+ if (s->stage != BLOCK_REPLICATION_FAILOVER) {
/* The backup job is cancelled unexpectedly */
s->error = -EIO;
}
aio_context_acquire(aio_context);
s = bs->opaque;
- if (s->replication_state != BLOCK_REPLICATION_NONE) {
+ if (s->stage != BLOCK_REPLICATION_NONE) {
error_setg(errp, "Block replication is running or done");
aio_context_release(aio_context);
return;
return;
}
+ /* Must be true, or the bdrv_getlength() calls would have failed */
+ assert(s->active_disk->bs->drv && s->hidden_disk->bs->drv);
+
if (!s->active_disk->bs->drv->bdrv_make_empty ||
!s->hidden_disk->bs->drv->bdrv_make_empty) {
error_setg(errp,
abort();
}
- s->replication_state = BLOCK_REPLICATION_RUNNING;
+ s->stage = BLOCK_REPLICATION_RUNNING;
if (s->mode == REPLICATION_MODE_SECONDARY) {
secondary_do_checkpoint(s, errp);
aio_context_acquire(aio_context);
s = bs->opaque;
- if (s->replication_state != BLOCK_REPLICATION_RUNNING) {
+ if (s->stage != BLOCK_REPLICATION_RUNNING) {
error_setg(errp, "Block replication is not running");
aio_context_release(aio_context);
return;
BDRVReplicationState *s = bs->opaque;
if (ret == 0) {
- s->replication_state = BLOCK_REPLICATION_DONE;
+ s->stage = BLOCK_REPLICATION_DONE;
/* refresh top bs's filename */
bdrv_refresh_filename(bs);
s->hidden_disk = NULL;
s->error = 0;
} else {
- s->replication_state = BLOCK_REPLICATION_FAILOVER_FAILED;
+ s->stage = BLOCK_REPLICATION_FAILOVER_FAILED;
s->error = -EIO;
}
}
aio_context_acquire(aio_context);
s = bs->opaque;
- if (s->replication_state != BLOCK_REPLICATION_RUNNING) {
+ if (s->stage != BLOCK_REPLICATION_RUNNING) {
error_setg(errp, "Block replication is not running");
aio_context_release(aio_context);
return;
switch (s->mode) {
case REPLICATION_MODE_PRIMARY:
- s->replication_state = BLOCK_REPLICATION_DONE;
+ s->stage = BLOCK_REPLICATION_DONE;
s->error = 0;
break;
case REPLICATION_MODE_SECONDARY:
if (!failover) {
secondary_do_checkpoint(s, errp);
- s->replication_state = BLOCK_REPLICATION_DONE;
+ s->stage = BLOCK_REPLICATION_DONE;
aio_context_release(aio_context);
return;
}
- s->replication_state = BLOCK_REPLICATION_FAILOVER;
+ s->stage = BLOCK_REPLICATION_FAILOVER;
commit_active_start(NULL, s->active_disk->bs, s->secondary_disk->bs,
BLOCK_JOB_INTERNAL, 0, BLOCKDEV_ON_ERROR_REPORT,
- NULL, replication_done, bs, errp, true);
+ NULL, replication_done, bs, true, errp);
break;
default:
aio_context_release(aio_context);
BlockDriver bdrv_replication = {
.format_name = "replication",
- .protocol_name = "replication",
.instance_size = sizeof(BDRVReplicationState),
.bdrv_open = replication_open,
.bdrv_close = replication_close,
- .bdrv_child_perm = bdrv_filter_default_perms,
+ .bdrv_child_perm = replication_child_perm,
.bdrv_getlength = replication_getlength,
.bdrv_co_readv = replication_co_readv,
projects / qemu.git / blobdiff