X-Git-Url: https://repo.jachan.dev/qemu.git/blobdiff_plain/cb83d2efe1f591cdc7ff2e8fbc67544155f264d6..6d809e7da943bb4b95b408fbf3d80d097c0f7d38:/block/replication.c diff --git a/block/replication.c b/block/replication.c index 6c0c7186d9..e70dd95001 100644 --- a/block/replication.c +++ b/block/replication.c @@ -20,6 +20,7 @@ #include "block/block_backup.h" #include "sysemu/block-backend.h" #include "qapi/error.h" +#include "qapi/qmp/qdict.h" #include "replication.h" typedef enum { @@ -39,8 +40,8 @@ typedef struct BDRVReplicationState { char *top_id; ReplicationState *rs; Error *blocker; - int orig_hidden_flags; - int orig_secondary_flags; + bool orig_hidden_read_only; + bool orig_secondary_read_only; int error; } BDRVReplicationState; @@ -145,7 +146,7 @@ static void replication_close(BlockDriverState *bs) replication_stop(s->rs, false, NULL); } if (s->stage == BLOCK_REPLICATION_FAILOVER) { - block_job_cancel_sync(s->active_disk->bs->job); + job_cancel_sync(&s->active_disk->bs->job->job); } if (s->mode == REPLICATION_MODE_SECONDARY) { @@ -218,9 +219,6 @@ static coroutine_fn int replication_co_readv(BlockDriverState *bs, QEMUIOVector *qiov) { BDRVReplicationState *s = bs->opaque; - BdrvChild *child = s->secondary_disk; - BlockJob *job = NULL; - CowRequest req; int ret; if (s->mode == REPLICATION_MODE_PRIMARY) { @@ -233,34 +231,17 @@ static coroutine_fn int replication_co_readv(BlockDriverState *bs, return ret; } - if (child && child->bs) { - job = child->bs->job; - } - - if (job) { - 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); - goto out; - } + ret = bdrv_co_preadv(bs->file, sector_num * BDRV_SECTOR_SIZE, + remaining_sectors * BDRV_SECTOR_SIZE, qiov, 0); - ret = bdrv_co_readv(bs->file, sector_num, remaining_sectors, qiov); -out: return replication_return_value(s, ret); } static coroutine_fn int replication_co_writev(BlockDriverState *bs, int64_t sector_num, int remaining_sectors, - QEMUIOVector *qiov) + QEMUIOVector *qiov, + int flags) { BDRVReplicationState *s = bs->opaque; QEMUIOVector hd_qiov; @@ -271,14 +252,15 @@ static coroutine_fn int replication_co_writev(BlockDriverState *bs, int ret; int64_t n; + assert(!flags); ret = replication_get_io_status(s); if (ret < 0) { goto out; } if (ret == 0) { - ret = bdrv_co_writev(top, sector_num, - remaining_sectors, qiov); + ret = bdrv_co_pwritev(top, sector_num * BDRV_SECTOR_SIZE, + remaining_sectors * BDRV_SECTOR_SIZE, qiov, 0); return replication_return_value(s, ret); } @@ -304,7 +286,8 @@ static coroutine_fn int replication_co_writev(BlockDriverState *bs, qemu_iovec_concat(&hd_qiov, qiov, bytes_done, count); target = ret ? top : base; - ret = bdrv_co_writev(target, sector_num, n, &hd_qiov); + ret = bdrv_co_pwritev(target, sector_num * BDRV_SECTOR_SIZE, + n * BDRV_SECTOR_SIZE, &hd_qiov, 0); if (ret < 0) { goto out1; } @@ -367,44 +350,38 @@ static void secondary_do_checkpoint(BDRVReplicationState *s, Error **errp) } } +/* This function is supposed to be called twice: + * first with writable = true, then with writable = false. + * The first call puts s->hidden_disk and s->secondary_disk in + * r/w mode, and the second puts them back in their original state. + */ static void reopen_backing_file(BlockDriverState *bs, bool writable, Error **errp) { BDRVReplicationState *s = bs->opaque; BlockReopenQueue *reopen_queue = NULL; - int orig_hidden_flags, orig_secondary_flags; - int new_hidden_flags, new_secondary_flags; Error *local_err = NULL; if (writable) { - orig_hidden_flags = s->orig_hidden_flags = - bdrv_get_flags(s->hidden_disk->bs); - new_hidden_flags = (orig_hidden_flags | BDRV_O_RDWR) & - ~BDRV_O_INACTIVE; - orig_secondary_flags = s->orig_secondary_flags = - bdrv_get_flags(s->secondary_disk->bs); - new_secondary_flags = (orig_secondary_flags | BDRV_O_RDWR) & - ~BDRV_O_INACTIVE; - } else { - orig_hidden_flags = (s->orig_hidden_flags | BDRV_O_RDWR) & - ~BDRV_O_INACTIVE; - new_hidden_flags = s->orig_hidden_flags; - orig_secondary_flags = (s->orig_secondary_flags | BDRV_O_RDWR) & - ~BDRV_O_INACTIVE; - new_secondary_flags = s->orig_secondary_flags; + s->orig_hidden_read_only = bdrv_is_read_only(s->hidden_disk->bs); + s->orig_secondary_read_only = bdrv_is_read_only(s->secondary_disk->bs); } 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); + if (s->orig_hidden_read_only) { + QDict *opts = qdict_new(); + qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !writable); + reopen_queue = bdrv_reopen_queue(reopen_queue, s->hidden_disk->bs, + opts); } - if (!(orig_secondary_flags & BDRV_O_RDWR)) { + if (s->orig_secondary_read_only) { + QDict *opts = qdict_new(); + qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !writable); reopen_queue = bdrv_reopen_queue(reopen_queue, s->secondary_disk->bs, - NULL, new_secondary_flags); + opts); } if (reopen_queue) { @@ -566,7 +543,7 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode, 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, + BLOCKDEV_ON_ERROR_REPORT, JOB_INTERNAL, backup_job_completed, bs, NULL, &local_err); if (local_err) { error_propagate(errp, local_err); @@ -574,7 +551,7 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode, aio_context_release(aio_context); return; } - block_job_start(job); + job_start(&job->job); break; default: aio_context_release(aio_context); @@ -679,7 +656,7 @@ static void replication_stop(ReplicationState *rs, bool failover, Error **errp) * disk, secondary disk in backup_job_completed(). */ if (s->secondary_disk->bs->job) { - block_job_cancel_sync(s->secondary_disk->bs->job); + job_cancel_sync(&s->secondary_disk->bs->job->job); } if (!failover) { @@ -691,7 +668,7 @@ static void replication_stop(ReplicationState *rs, bool failover, Error **errp) 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, + JOB_INTERNAL, 0, BLOCKDEV_ON_ERROR_REPORT, NULL, replication_done, bs, true, errp); break; default: