diff options
| -rw-r--r-- | block.c | 37 | ||||
| -rw-r--r-- | block/commit.c | 6 | ||||
| -rw-r--r-- | blockdev.c | 6 | ||||
| -rw-r--r-- | include/block/block-global-state.h | 3 | ||||
| -rw-r--r-- | include/block/block_int-common.h | 4 | ||||
| -rw-r--r-- | include/block/block_int-global-state.h | 3 | ||||
| -rw-r--r-- | qapi/block-core.json | 8 | ||||
| -rw-r--r-- | tests/unit/test-bdrv-drain.c | 3 |
8 files changed, 58 insertions, 12 deletions
@@ -1309,11 +1309,14 @@ static void bdrv_backing_detach(BdrvChild *c) } static int bdrv_backing_update_filename(BdrvChild *c, BlockDriverState *base, - const char *filename, Error **errp) + const char *filename, + bool backing_mask_protocol, + Error **errp) { BlockDriverState *parent = c->opaque; bool read_only = bdrv_is_read_only(parent); int ret; + const char *format_name; GLOBAL_STATE_CODE(); if (read_only) { @@ -1323,9 +1326,23 @@ static int bdrv_backing_update_filename(BdrvChild *c, BlockDriverState *base, } } - ret = bdrv_change_backing_file(parent, filename, - base->drv ? base->drv->format_name : "", - false); + if (base->drv) { + /* + * If the new base image doesn't have a format driver layer, which we + * detect by the fact that @base is a protocol driver, we record + * 'raw' as the format instead of putting the protocol name as the + * backing format + */ + if (backing_mask_protocol && base->drv->protocol_name) { + format_name = "raw"; + } else { + format_name = base->drv->format_name; + } + } else { + format_name = ""; + } + + ret = bdrv_change_backing_file(parent, filename, format_name, false); if (ret < 0) { error_setg_errno(errp, -ret, "Could not update backing file link"); } @@ -1479,10 +1496,14 @@ static void GRAPH_WRLOCK bdrv_child_cb_detach(BdrvChild *child) } static int bdrv_child_cb_update_filename(BdrvChild *c, BlockDriverState *base, - const char *filename, Error **errp) + const char *filename, + bool backing_mask_protocol, + Error **errp) { if (c->role & BDRV_CHILD_COW) { - return bdrv_backing_update_filename(c, base, filename, errp); + return bdrv_backing_update_filename(c, base, filename, + backing_mask_protocol, + errp); } return 0; } @@ -5803,7 +5824,8 @@ void bdrv_unfreeze_backing_chain(BlockDriverState *bs, BlockDriverState *base) * */ int bdrv_drop_intermediate(BlockDriverState *top, BlockDriverState *base, - const char *backing_file_str) + const char *backing_file_str, + bool backing_mask_protocol) { BlockDriverState *explicit_top = top; bool update_inherits_from; @@ -5869,6 +5891,7 @@ int bdrv_drop_intermediate(BlockDriverState *top, BlockDriverState *base, if (c->klass->update_filename) { ret = c->klass->update_filename(c, base, backing_file_str, + backing_mask_protocol, &local_err); if (ret < 0) { /* diff --git a/block/commit.c b/block/commit.c index 1dd7a65..7c3fdcb 100644 --- a/block/commit.c +++ b/block/commit.c @@ -42,6 +42,7 @@ typedef struct CommitBlockJob { bool base_read_only; bool chain_frozen; char *backing_file_str; + bool backing_mask_protocol; } CommitBlockJob; static int commit_prepare(Job *job) @@ -61,7 +62,8 @@ static int commit_prepare(Job *job) /* FIXME: bdrv_drop_intermediate treats total failures and partial failures * identically. Further work is needed to disambiguate these cases. */ return bdrv_drop_intermediate(s->commit_top_bs, s->base_bs, - s->backing_file_str); + s->backing_file_str, + s->backing_mask_protocol); } static void commit_abort(Job *job) @@ -254,6 +256,7 @@ void commit_start(const char *job_id, BlockDriverState *bs, BlockDriverState *base, BlockDriverState *top, int creation_flags, int64_t speed, BlockdevOnError on_error, const char *backing_file_str, + bool backing_mask_protocol, const char *filter_node_name, Error **errp) { CommitBlockJob *s; @@ -408,6 +411,7 @@ void commit_start(const char *job_id, BlockDriverState *bs, blk_set_disable_request_queuing(s->top, true); s->backing_file_str = g_strdup(backing_file_str); + s->backing_mask_protocol = backing_mask_protocol; s->on_error = on_error; trace_commit_start(bs, base, top, s); @@ -2420,6 +2420,8 @@ void qmp_block_commit(const char *job_id, const char *device, const char *top_node, const char *top, const char *backing_file, + bool has_backing_mask_protocol, + bool backing_mask_protocol, bool has_speed, int64_t speed, bool has_on_error, BlockdevOnError on_error, const char *filter_node_name, @@ -2450,6 +2452,9 @@ void qmp_block_commit(const char *job_id, const char *device, if (has_auto_dismiss && !auto_dismiss) { job_flags |= JOB_MANUAL_DISMISS; } + if (!has_backing_mask_protocol) { + backing_mask_protocol = false; + } /* Important Note: * libvirt relies on the DeviceNotFound error class in order to probe for @@ -2591,6 +2596,7 @@ void qmp_block_commit(const char *job_id, const char *device, } commit_start(job_id, bs, base_bs, top_bs, job_flags, speed, on_error, backing_file, + backing_mask_protocol, filter_node_name, &local_err); } if (local_err != NULL) { diff --git a/include/block/block-global-state.h b/include/block/block-global-state.h index 4ec0b21..bd7cecd 100644 --- a/include/block/block-global-state.h +++ b/include/block/block-global-state.h @@ -144,7 +144,8 @@ int GRAPH_RDLOCK bdrv_make_empty(BdrvChild *c, Error **errp); void bdrv_register(BlockDriver *bdrv); int bdrv_drop_intermediate(BlockDriverState *top, BlockDriverState *base, - const char *backing_file_str); + const char *backing_file_str, + bool backing_mask_protocol); BlockDriverState * GRAPH_RDLOCK bdrv_find_overlay(BlockDriverState *active, BlockDriverState *bs); diff --git a/include/block/block_int-common.h b/include/block/block_int-common.h index 151279d..7612761 100644 --- a/include/block/block_int-common.h +++ b/include/block/block_int-common.h @@ -985,7 +985,9 @@ struct BdrvChildClass { * can update its reference. */ int (*update_filename)(BdrvChild *child, BlockDriverState *new_base, - const char *filename, Error **errp); + const char *filename, + bool backing_mask_protocol, + Error **errp); bool (*change_aio_ctx)(BdrvChild *child, AioContext *ctx, GHashTable *visited, Transaction *tran, diff --git a/include/block/block_int-global-state.h b/include/block/block_int-global-state.h index ef31c58..2162269 100644 --- a/include/block/block_int-global-state.h +++ b/include/block/block_int-global-state.h @@ -82,6 +82,8 @@ void stream_start(const char *job_id, BlockDriverState *bs, * @speed: The maximum speed, in bytes per second, or 0 for unlimited. * @on_error: The action to take upon error. * @backing_file_str: String to use as the backing file in @top's overlay + * @backing_mask_protocol: Replace potential protocol name with 'raw' in + * 'backing file format' header * @filter_node_name: The node name that should be assigned to the filter * driver that the commit job inserts into the graph above @top. NULL means * that a node name should be autogenerated. @@ -92,6 +94,7 @@ void commit_start(const char *job_id, BlockDriverState *bs, BlockDriverState *base, BlockDriverState *top, int creation_flags, int64_t speed, BlockdevOnError on_error, const char *backing_file_str, + bool backing_mask_protocol, const char *filter_node_name, Error **errp); /** * commit_active_start: diff --git a/qapi/block-core.json b/qapi/block-core.json index ca390c5..726145e 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1810,6 +1810,11 @@ # Care should be taken when specifying the string, to specify a # valid filename or protocol. (Since 2.1) # +# @backing-mask-protocol: If true, replace any protocol mentioned in the +# 'backing file format' with 'raw', rather than storing the protocol +# name as the backing format. Can be used even when no image header +# will be updated (default false; since 9.0). +# # @speed: the maximum speed, in bytes per second # # @on-error: the action to take on an error. 'ignore' means that the @@ -1856,7 +1861,8 @@ '*base': { 'type': 'str', 'features': [ 'deprecated' ] }, '*top-node': 'str', '*top': { 'type': 'str', 'features': [ 'deprecated' ] }, - '*backing-file': 'str', '*speed': 'int', + '*backing-file': 'str', '*backing-mask-protocol': 'bool', + '*speed': 'int', '*on-error': 'BlockdevOnError', '*filter-node-name': 'str', '*auto-finalize': 'bool', '*auto-dismiss': 'bool' }, diff --git a/tests/unit/test-bdrv-drain.c b/tests/unit/test-bdrv-drain.c index 17830a6..6668804 100644 --- a/tests/unit/test-bdrv-drain.c +++ b/tests/unit/test-bdrv-drain.c @@ -1591,6 +1591,7 @@ static const BlockJobDriver test_simple_job_driver = { static int drop_intermediate_poll_update_filename(BdrvChild *child, BlockDriverState *new_base, const char *filename, + bool backing_mask_protocol, Error **errp) { /* @@ -1702,7 +1703,7 @@ static void test_drop_intermediate_poll(void) job->should_complete = true; g_assert(!job_has_completed); - ret = bdrv_drop_intermediate(chain[1], chain[0], NULL); + ret = bdrv_drop_intermediate(chain[1], chain[0], NULL, false); aio_poll(qemu_get_aio_context(), false); g_assert(ret == 0); g_assert(job_has_completed); |