db5d2a4b77
where there is no good reason to keep them separate. It's a pain during rebase if there are multiple patches changing the same code over and over again. This was especially bad for the backup-related patches. If the history of patches really is needed, it can be extracted via git. Additionally, compilation with partial application of patches was broken since a long time, because one of the master key changes became part of an earlier patch during a past rebase. If only the same files were changed by a subsequent patch and the changes felt to belong together (obvious for later bug fixes, but also done for features e.g. adding master key support for PBS), the patches were squashed together. The PBS namespace support patch was split into the individual parts it changes, i.e. PBS block driver, pbs-restore binary and QMP backup infrastructure, and squashed into the respective patches. No code change is intended, git diff in the submodule should not show any difference between applying all patches before this commit and applying all patches after this commit. The query-proxmox-support QMP function has been left as part of the "PVE-Backup: Proxmox backup patches for QEMU" patch, because it's currently only used there. If it ever is used elsewhere too, it can be split out from there. The recent alloc-track and BQL-related savevm-async changes have been left separate for now, because it's not 100% clear they are the best approach yet. This depends on what upstream decides about the BQL stuff and whether and what kind of issues with the changes pop up. The qemu-img dd snapshot patch has been re-ordered to after the other qemu-img dd patches. Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
60 lines
2.4 KiB
Diff
60 lines
2.4 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Fabian Ebner <f.ebner@proxmox.com>
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Date: Wed, 2 Mar 2022 08:35:05 +0100
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Subject: [PATCH] block/backup: move bcs bitmap initialization to job creation
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For backing up the state of multiple disks from the same time, a job
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for each disk has to be created. It's convenient if the jobs don't
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have to be started at the same time and if operation of the VM can be
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resumed after job creation. This would lead to a window between job
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creation and running the job, where writes can happen. But no writes
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should happen between setting up the copy-before-write filter and
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setting up the block copy state bitmap, because then new writes would
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just pass through.
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Commit 06e0a9c16405c0a4c1eca33cf286cc04c42066a2 moved initalization of
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the bitmap to setting up the copy-before-write filter when sync_mode
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is not MIRROR_SYNC_MODE_BITMAP. Ensure that the bitmap is initialized
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upon job creation for the remaining case too, by moving the
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backup_init_bcs_bitmap call to backup_job_create.
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Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
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Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
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---
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block/backup.c | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/block/backup.c b/block/backup.c
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index db3791f4d1..39410dcf8d 100644
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--- a/block/backup.c
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+++ b/block/backup.c
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@@ -237,8 +237,8 @@ static void backup_init_bcs_bitmap(BackupBlockJob *job)
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true);
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} else if (job->sync_mode == MIRROR_SYNC_MODE_TOP) {
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/*
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- * We can't hog the coroutine to initialize this thoroughly.
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- * Set a flag and resume work when we are able to yield safely.
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+ * Initialization is costly here. Simply set a flag and let the
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+ * backup_run coroutine resume work once it can yield safely.
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*/
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block_copy_set_skip_unallocated(job->bcs, true);
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}
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@@ -252,8 +252,6 @@ static int coroutine_fn backup_run(Job *job, Error **errp)
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BackupBlockJob *s = container_of(job, BackupBlockJob, common.job);
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int ret;
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- backup_init_bcs_bitmap(s);
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-
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if (s->sync_mode == MIRROR_SYNC_MODE_TOP) {
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int64_t offset = 0;
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int64_t count;
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@@ -495,6 +493,8 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
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block_job_add_bdrv(&job->common, "target", target, 0, BLK_PERM_ALL,
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&error_abort);
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+ backup_init_bcs_bitmap(job);
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+
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return &job->common;
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error:
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