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From: Fiona Ebner <f.ebner@proxmox.com>
To: pve-devel@lists.proxmox.com
Date: Tue, 9 Jan 2024 15:10:00 +0100
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Subject: [pve-devel] [PATCH qemu 2/2] backup: avoid bubbling up first
ECANCELED error
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With pvebackup_propagate_error(), the first error wins. When one job
in the transaction fails, it is expected that later jobs get the
ECANCELED error. Those are not interesting and by skipping them a more
interesting error, which is likely the actual root cause, can win.
Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
---
...E-Backup-Proxmox-backup-patches-for-QEMU.patch | 15 ++++++++++-----
...VE-Migrate-dirty-bitmap-state-via-savevm.patch | 4 ++--
2 files changed, 12 insertions(+), 7 deletions(-)
diff --git a/debian/patches/pve/0030-PVE-Backup-Proxmox-backup-patches-for-QEMU.patch b/debian/patches/pve/0030-PVE-Backup-Proxmox-backup-patches-for-QEMU.patch
index bd1633b..4ea1787 100644
--- a/debian/patches/pve/0030-PVE-Backup-Proxmox-backup-patches-for-QEMU.patch
+++ b/debian/patches/pve/0030-PVE-Backup-Proxmox-backup-patches-for-QEMU.patch
@@ -94,11 +94,11 @@ Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
monitor/hmp-cmds.c | 72 +++
proxmox-backup-client.c | 146 +++++
proxmox-backup-client.h | 60 ++
- pve-backup.c | 1067 ++++++++++++++++++++++++++++++++
+ pve-backup.c | 1072 ++++++++++++++++++++++++++++++++
qapi/block-core.json | 229 +++++++
qapi/common.json | 14 +
qapi/machine.json | 16 +-
- 14 files changed, 1682 insertions(+), 14 deletions(-)
+ 14 files changed, 1687 insertions(+), 14 deletions(-)
create mode 100644 proxmox-backup-client.c
create mode 100644 proxmox-backup-client.h
create mode 100644 pve-backup.c
@@ -586,10 +586,10 @@ index 0000000000..8cbf645b2c
+#endif /* PROXMOX_BACKUP_CLIENT_H */
diff --git a/pve-backup.c b/pve-backup.c
new file mode 100644
-index 0000000000..d84d807654
+index 0000000000..5ed3c6a310
--- /dev/null
+++ b/pve-backup.c
-@@ -0,0 +1,1067 @@
+@@ -0,0 +1,1072 @@
+#include "proxmox-backup-client.h"
+#include "vma.h"
+
@@ -899,7 +899,12 @@ index 0000000000..d84d807654
+
+ qemu_co_mutex_lock(&backup_state.backup_mutex);
+
-+ if (ret < 0) {
++ /*
++ * All jobs in the transaction will be canceled when one receives an error.
++ * The first error wins, so only set it for ECANCELED if it was the last
++ * job. This allows more interesting errors from other jobs to win.
++ */
++ if (ret < 0 && (ret != -ECANCELED || !g_list_nth(backup_state.di_list, 1))) {
+ Error *local_err = NULL;
+ error_setg(&local_err, "job failed with err %d - %s", ret, strerror(-ret));
+ pvebackup_propagate_error(local_err);
diff --git a/debian/patches/pve/0034-PVE-Migrate-dirty-bitmap-state-via-savevm.patch b/debian/patches/pve/0034-PVE-Migrate-dirty-bitmap-state-via-savevm.patch
index f6cd3c3..9414331 100644
--- a/debian/patches/pve/0034-PVE-Migrate-dirty-bitmap-state-via-savevm.patch
+++ b/debian/patches/pve/0034-PVE-Migrate-dirty-bitmap-state-via-savevm.patch
@@ -174,10 +174,10 @@ index 0000000000..887e998b9e
+ NULL);
+}
diff --git a/pve-backup.c b/pve-backup.c
-index d84d807654..9c8b88d075 100644
+index 5ed3c6a310..6720e985bc 100644
--- a/pve-backup.c
+++ b/pve-backup.c
-@@ -1060,6 +1060,7 @@ ProxmoxSupportStatus *qmp_query_proxmox_support(Error **errp)
+@@ -1065,6 +1065,7 @@ ProxmoxSupportStatus *qmp_query_proxmox_support(Error **errp)
ret->pbs_library_version = g_strdup(proxmox_backup_qemu_version());
ret->pbs_dirty_bitmap = true;
ret->pbs_dirty_bitmap_savevm = true;
--
2.39.2