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Subject: [pve-devel] [PATCH v4 pve-qemu 1/1] add block-commit-replaces
option patch
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From: Alexandre Derumier <alexandre.derumier@groupe-cyllene.com>
To: pve-devel@lists.proxmox.com
Subject: [PATCH v4 pve-qemu 1/1] add block-commit-replaces option patch
Date: Tue, 11 Mar 2025 11:28:49 +0100
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This is needed for external snapshot live commit,
when the top blocknode is not the fmt-node.
(in our case, the throttle-group node is the topnode)
Signed-off-by: Alexandre Derumier <alexandre.derumier@groupe-cyllene.com>
---
...051-block-commit-add-replaces-option.patch | 137 ++++++++++++++++++
debian/patches/series | 1 +
2 files changed, 138 insertions(+)
create mode 100644 debian/patches/pve/0051-block-commit-add-replaces-option.patch
diff --git a/debian/patches/pve/0051-block-commit-add-replaces-option.patch b/debian/patches/pve/0051-block-commit-add-replaces-option.patch
new file mode 100644
index 0000000..2488b5b
--- /dev/null
+++ b/debian/patches/pve/0051-block-commit-add-replaces-option.patch
@@ -0,0 +1,137 @@
+From ae39fd3bb72db440cf380978af9bf5693c12ac6c Mon Sep 17 00:00:00 2001
+From: Alexandre Derumier <alexandre.derumier@groupe-cyllene.com>
+Date: Wed, 11 Dec 2024 16:20:25 +0100
+Subject: [PATCH] block-commit: add replaces option
+
+This use same code than drive-mirror for live commit, but the option
+is not send currently.
+
+Allow to replaces a different node than the root node after the block-commit
+(as we use throttle-group as root, and not the drive)
+---
+ block/mirror.c | 4 ++--
+ block/replication.c | 2 +-
+ blockdev.c | 4 ++--
+ include/block/block_int-global-state.h | 4 +++-
+ qapi/block-core.json | 5 ++++-
+ qemu-img.c | 2 +-
+ 6 files changed, 13 insertions(+), 8 deletions(-)
+
+diff --git a/block/mirror.c b/block/mirror.c
+index 2f12238..1a5e528 100644
+--- a/block/mirror.c
++++ b/block/mirror.c
+@@ -2086,7 +2086,7 @@ BlockJob *commit_active_start(const char *job_id, BlockDriverState *bs,
+ int64_t speed, BlockdevOnError on_error,
+ const char *filter_node_name,
+ BlockCompletionFunc *cb, void *opaque,
+- bool auto_complete, Error **errp)
++ bool auto_complete, const char *replaces, Error **errp)
+ {
+ bool base_read_only;
+ BlockJob *job;
+@@ -2102,7 +2102,7 @@ BlockJob *commit_active_start(const char *job_id, BlockDriverState *bs,
+ }
+
+ job = mirror_start_job(
+- job_id, bs, creation_flags, base, NULL, speed, 0, 0,
++ job_id, bs, creation_flags, base, replaces, speed, 0, 0,
+ MIRROR_LEAVE_BACKING_CHAIN, false,
+ on_error, on_error, true, cb, opaque,
+ &commit_active_job_driver, MIRROR_SYNC_MODE_FULL,
+diff --git a/block/replication.c b/block/replication.c
+index 0415a5e..debbe25 100644
+--- a/block/replication.c
++++ b/block/replication.c
+@@ -711,7 +711,7 @@ static void replication_stop(ReplicationState *rs, bool failover, Error **errp)
+ s->commit_job = commit_active_start(
+ NULL, bs->file->bs, s->secondary_disk->bs,
+ JOB_INTERNAL, 0, BLOCKDEV_ON_ERROR_REPORT,
+- NULL, replication_done, bs, true, errp);
++ NULL, replication_done, bs, true, NULL, errp);
+ bdrv_graph_rdunlock_main_loop();
+ break;
+ default:
+diff --git a/blockdev.c b/blockdev.c
+index cbe2243..349fb71 100644
+--- a/blockdev.c
++++ b/blockdev.c
+@@ -2435,7 +2435,7 @@ void qmp_block_commit(const char *job_id, const char *device,
+ const char *filter_node_name,
+ bool has_auto_finalize, bool auto_finalize,
+ bool has_auto_dismiss, bool auto_dismiss,
+- Error **errp)
++ const char *replaces, Error **errp)
+ {
+ BlockDriverState *bs;
+ BlockDriverState *iter;
+@@ -2596,7 +2596,7 @@ void qmp_block_commit(const char *job_id, const char *device,
+ job_id = bdrv_get_device_name(bs);
+ }
+ commit_active_start(job_id, top_bs, base_bs, job_flags, speed, on_error,
+- filter_node_name, NULL, NULL, false, &local_err);
++ filter_node_name, NULL, NULL, false, replaces, &local_err);
+ } else {
+ BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
+ if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
+diff --git a/include/block/block_int-global-state.h b/include/block/block_int-global-state.h
+index f0c642b..194b580 100644
+--- a/include/block/block_int-global-state.h
++++ b/include/block/block_int-global-state.h
+@@ -115,6 +115,7 @@ void commit_start(const char *job_id, BlockDriverState *bs,
+ * @cb: Completion function for the job.
+ * @opaque: Opaque pointer value passed to @cb.
+ * @auto_complete: Auto complete the job.
++ * @replaces: Block graph node name to replace once the commit is done.
+ * @errp: Error object.
+ *
+ */
+@@ -123,7 +124,8 @@ BlockJob *commit_active_start(const char *job_id, BlockDriverState *bs,
+ int64_t speed, BlockdevOnError on_error,
+ const char *filter_node_name,
+ BlockCompletionFunc *cb, void *opaque,
+- bool auto_complete, Error **errp);
++ bool auto_complete, const char *replaces,
++ Error **errp);
+ /*
+ * mirror_start:
+ * @job_id: The id of the newly-created job, or %NULL to use the
+diff --git a/qapi/block-core.json b/qapi/block-core.json
+index ff441d4..50564c7 100644
+--- a/qapi/block-core.json
++++ b/qapi/block-core.json
+@@ -2098,6 +2098,8 @@
+ # disappear from the query list without user intervention.
+ # Defaults to true. (Since 3.1)
+ #
++# @replaces: graph node name to be replaced base image node.
++#
+ # Features:
+ #
+ # @deprecated: Members @base and @top are deprecated. Use @base-node
+@@ -2125,7 +2127,8 @@
+ '*speed': 'int',
+ '*on-error': 'BlockdevOnError',
+ '*filter-node-name': 'str',
+- '*auto-finalize': 'bool', '*auto-dismiss': 'bool' },
++ '*auto-finalize': 'bool', '*auto-dismiss': 'bool',
++ '*replaces': 'str' },
+ 'allow-preconfig': true }
+
+ ##
+diff --git a/qemu-img.c b/qemu-img.c
+index a6c88e0..f6c59bc 100644
+--- a/qemu-img.c
++++ b/qemu-img.c
+@@ -1079,7 +1079,7 @@ static int img_commit(int argc, char **argv)
+
+ commit_active_start("commit", bs, base_bs, JOB_DEFAULT, rate_limit,
+ BLOCKDEV_ON_ERROR_REPORT, NULL, common_block_job_cb,
+- &cbi, false, &local_err);
++ &cbi, false, NULL, &local_err);
+ if (local_err) {
+ goto done;
+ }
+--
+2.39.5
+
diff --git a/debian/patches/series b/debian/patches/series
index b780c1f..e60cd29 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -65,3 +65,4 @@ pve/0047-PVE-backup-factor-out-setting-up-snapshot-access-for.patch
pve/0048-PVE-backup-save-device-name-in-device-info-structure.patch
pve/0049-PVE-backup-include-device-name-in-error-when-setting.patch
pve/0050-adapt-machine-version-deprecation-for-Proxmox-VE.patch
+pve/0051-block-commit-add-replaces-option.patch
--
2.39.5
--===============4478170072856352620==
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