Add transaction patches and fix for blocking finish

With the transaction patches, patch 0026-PVE-Backup-modify-job-api.patch
is no longer necessary, so drop it and rebase all following patches on
top.

Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>

debian/patches/pve/0026-PVE-Backup-modify-job-api.patch

@@ -1,92 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Wolfgang Bumiller <w.bumiller@proxmox.com>
-Date: Mon, 6 Apr 2020 12:16:56 +0200
-Subject: [PATCH] PVE-Backup: modify job api
-
-Introduce a pause_count parameter to start a backup in
-paused mode. This way backups of multiple drives can be
-started up sequentially via the completion callback while
-having been started at the same point in time.
-
-Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
----
- block/backup.c            | 3 +++
- block/replication.c       | 2 +-
- blockdev.c                | 3 ++-
- include/block/block_int.h | 1 +
- job.c                     | 2 +-
- 5 files changed, 8 insertions(+), 3 deletions(-)
-
-diff --git a/block/backup.c b/block/backup.c
-index 4f13bb20a5..5f373a4f9b 100644
---- a/block/backup.c
-+++ b/block/backup.c
-@@ -338,6 +338,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
-                   BlockdevOnError on_target_error,
-                   int creation_flags,
-                   BlockCompletionFunc *cb, void *opaque,
-+                  int pause_count,
-                   JobTxn *txn, Error **errp)
- {
-     int64_t len, target_len;
-@@ -471,6 +472,8 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
-     block_job_add_bdrv(&job->common, "target", target, 0, BLK_PERM_ALL,
-                        &error_abort);
- 
-+    job->common.job.pause_count += pause_count;
-+
-     return &job->common;
- 
-  error:
-diff --git a/block/replication.c b/block/replication.c
-index 0c70215784..59270a0468 100644
---- a/block/replication.c
-+++ b/block/replication.c
-@@ -560,7 +560,7 @@ static void replication_start(ReplicationState *rs, ReplicationMode mode,
-                                 0, MIRROR_SYNC_MODE_NONE, NULL, 0, false, NULL,
-                                 BLOCKDEV_ON_ERROR_REPORT,
-                                 BLOCKDEV_ON_ERROR_REPORT, JOB_INTERNAL,
--                                backup_job_completed, bs, NULL, &local_err);
-+                                backup_job_completed, bs, 0, NULL, &local_err);
-         if (local_err) {
-             error_propagate(errp, local_err);
-             backup_job_cleanup(bs);
-diff --git a/blockdev.c b/blockdev.c
-index 3848a9c8ab..5107c5445e 100644
---- a/blockdev.c
-+++ b/blockdev.c
-@@ -2832,7 +2832,8 @@ static BlockJob *do_backup_common(BackupCommon *backup,
-                             backup->filter_node_name,
-                             backup->on_source_error,
-                             backup->on_target_error,
--                            job_flags, NULL, NULL, txn, errp);
-+                            job_flags, NULL, NULL, 0, txn, errp);
-+
-     return job;
- }
- 
-diff --git a/include/block/block_int.h b/include/block/block_int.h
-index 38dec0275b..5094ae1e95 100644
---- a/include/block/block_int.h
-+++ b/include/block/block_int.h
-@@ -1254,6 +1254,7 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
-                             BlockdevOnError on_target_error,
-                             int creation_flags,
-                             BlockCompletionFunc *cb, void *opaque,
-+                            int pause_count,
-                             JobTxn *txn, Error **errp);
- 
- BdrvChild *bdrv_root_attach_child(BlockDriverState *child_bs,
-diff --git a/job.c b/job.c
-index 53be57a3a0..e82253e041 100644
---- a/job.c
-+++ b/job.c
-@@ -918,7 +918,7 @@ void job_start(Job *job)
-     job->co = qemu_coroutine_create(job_co_entry, job);
-     job->pause_count--;
-     job->busy = true;
--    job->paused = false;
-+    job->paused = job->pause_count > 0;
-     job_state_transition(job, JOB_STATUS_RUNNING);
-     aio_co_enter(job->aio_context, job->co);
- }

debian/patches/pve/0027-PVE-Backup-add-backup-dump-block-driver.patch

@@ -203,7 +203,7 @@ index 0000000000..93d7f46950
 +    return bs;
 +}
 diff --git a/block/backup.c b/block/backup.c
-index 5f373a4f9b..1bcc7faa32 100644
+index 4f13bb20a5..cd42236b79 100644
 --- a/block/backup.c
 +++ b/block/backup.c
 @@ -32,24 +32,6 @@
@@ -231,7 +231,7 @@ index 5f373a4f9b..1bcc7faa32 100644
  static const BlockJobDriver backup_job_driver;
  
  static void backup_progress_bytes_callback(int64_t bytes, void *opaque)
-@@ -423,6 +405,11 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
+@@ -422,6 +404,11 @@ BlockJob *backup_job_create(const char *job_id, BlockDriverState *bs,
          goto error;
      }
  
@@ -244,7 +244,7 @@ index 5f373a4f9b..1bcc7faa32 100644
       * If source is in backing chain of target assume that target is going to be
       * used for "image fleecing", i.e. it should represent a kind of snapshot of
 diff --git a/include/block/block_int.h b/include/block/block_int.h
-index 5094ae1e95..dc72197388 100644
+index 38dec0275b..1efb1f527c 100644
 --- a/include/block/block_int.h
 +++ b/include/block/block_int.h
 @@ -62,6 +62,36 @@
@@ -285,7 +285,7 @@ index 5094ae1e95..dc72197388 100644
      BDRV_TRACKED_READ,
      BDRV_TRACKED_WRITE,
 diff --git a/job.c b/job.c
-index e82253e041..bcbbb0be02 100644
+index 53be57a3a0..b8139c80a4 100644
 --- a/job.c
 +++ b/job.c
 @@ -269,7 +269,8 @@ static bool job_started(Job *job)

debian/patches/pve/0028-PVE-Backup-proxmox-backup-patches-for-qemu.patch

@@ -16,11 +16,11 @@ Subject: [PATCH] PVE-Backup: proxmox backup patches for qemu
  monitor/hmp-cmds.c             |  44 ++
  proxmox-backup-client.c        | 182 +++++++
  proxmox-backup-client.h        |  52 ++
- pve-backup.c                   | 959 +++++++++++++++++++++++++++++++++
+ pve-backup.c                   | 955 +++++++++++++++++++++++++++++++++
  qapi/block-core.json           | 109 ++++
  qapi/common.json               |  13 +
  qapi/misc.json                 |  13 -
- 16 files changed, 1443 insertions(+), 15 deletions(-)
+ 16 files changed, 1439 insertions(+), 15 deletions(-)
  create mode 100644 proxmox-backup-client.c
  create mode 100644 proxmox-backup-client.h
  create mode 100644 pve-backup.c
@@ -112,7 +112,7 @@ index 4c8c375172..d485c3ac79 100644
 +    hmp_handle_error(mon, error);
 +}
 diff --git a/blockdev.c b/blockdev.c
-index 5107c5445e..3c427fc4be 100644
+index 3848a9c8ab..681da7c8b6 100644
 --- a/blockdev.c
 +++ b/blockdev.c
 @@ -36,6 +36,7 @@
@@ -188,7 +188,7 @@ index 2b58ac4a1c..9e58b6a5fc 100644
  
      {
 diff --git a/include/block/block_int.h b/include/block/block_int.h
-index dc72197388..5ff3b1186f 100644
+index 1efb1f527c..8dda6f769d 100644
 --- a/include/block/block_int.h
 +++ b/include/block/block_int.h
 @@ -64,7 +64,7 @@
@@ -524,7 +524,7 @@ index 0000000000..b311bf8de8
 +#endif /* PROXMOX_BACKUP_CLIENT_H */
 diff --git a/pve-backup.c b/pve-backup.c
 new file mode 100644
-index 0000000000..9ae89fb679
+index 0000000000..55441eb9d1
 --- /dev/null
 +++ b/pve-backup.c
 @@ -0,0 +1,955 @@

debian/patches/pve/0030-PVE-Backup-avoid-coroutines-to-fix-AIO-freeze-cleanu.patch

@@ -36,7 +36,7 @@ Signed-off-by: Dietmar Maurer <dietmar@proxmox.com>
  1 file changed, 320 insertions(+), 318 deletions(-)
 
 diff --git a/pve-backup.c b/pve-backup.c
-index 9ae89fb679..bb917ee972 100644
+index 55441eb9d1..d40f3f2fd6 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
 @@ -11,11 +11,27 @@
@@ -746,7 +746,7 @@ index 9ae89fb679..bb917ee972 100644
                    "previous backup not finished");
          return;
      }
-@@ -631,7 +692,7 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
+@@ -627,7 +688,7 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
              if (dev_id < 0)
                  goto err;
  
@@ -755,7 +755,7 @@ index 9ae89fb679..bb917ee972 100644
                  goto err;
              }
  
-@@ -652,7 +713,7 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
+@@ -648,7 +709,7 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
              PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
              l = g_list_next(l);
  
@@ -764,7 +764,7 @@ index 9ae89fb679..bb917ee972 100644
                  goto err;
              }
  
-@@ -717,9 +778,7 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
+@@ -713,9 +774,7 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
      }
      /* initialize global backup_state now */
  
@@ -775,7 +775,7 @@ index 9ae89fb679..bb917ee972 100644
  
      if (backup_state.stat.error) {
          error_free(backup_state.stat.error);
-@@ -742,7 +801,7 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
+@@ -738,7 +797,7 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
      backup_state.stat.transferred = 0;
      backup_state.stat.zero_bytes = 0;
  
@@ -784,7 +784,7 @@ index 9ae89fb679..bb917ee972 100644
  
      backup_state.speed = (task->has_speed && task->speed > 0) ? task->speed : 0;
  
-@@ -751,48 +810,6 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
+@@ -747,48 +806,6 @@ static void coroutine_fn pvebackup_co_start(void *opaque)
  
      backup_state.di_list = di_list;
  
@@ -833,7 +833,7 @@ index 9ae89fb679..bb917ee972 100644
      uuid_info = g_malloc0(sizeof(*uuid_info));
      uuid_info->UUID = uuid_str;
  
-@@ -835,8 +852,6 @@ err:
+@@ -831,8 +848,6 @@ err:
          rmdir(backup_dir);
      }
  
@@ -842,7 +842,7 @@ index 9ae89fb679..bb917ee972 100644
      task->result = NULL;
      return;
  }
-@@ -880,32 +895,31 @@ UuidInfo *qmp_backup(
+@@ -876,32 +891,31 @@ UuidInfo *qmp_backup(
          .errp = errp,
      };
  
@@ -890,7 +890,7 @@ index 9ae89fb679..bb917ee972 100644
      }
  
      info->has_status = true;
-@@ -941,19 +955,7 @@ static void coroutine_fn pvebackup_co_query(void *opaque)
+@@ -937,19 +951,7 @@ static void coroutine_fn pvebackup_co_query(void *opaque)
      info->has_transferred = true;
      info->transferred = backup_state.stat.transferred;
  

debian/patches/pve/0031-drive-mirror-add-support-for-sync-bitmap-mode-never.patch

@@ -249,10 +249,10 @@ index e8e8844afc..100e828639 100644
                       &local_err);
      if (local_err) {
 diff --git a/blockdev.c b/blockdev.c
-index 3c427fc4be..28ed750ba5 100644
+index 681da7c8b6..02d58e7645 100644
 --- a/blockdev.c
 +++ b/blockdev.c
-@@ -2877,6 +2877,10 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
+@@ -2876,6 +2876,10 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
                                     BlockDriverState *target,
                                     bool has_replaces, const char *replaces,
                                     enum MirrorSyncMode sync,
@@ -263,7 +263,7 @@ index 3c427fc4be..28ed750ba5 100644
                                     BlockMirrorBackingMode backing_mode,
                                     bool zero_target,
                                     bool has_speed, int64_t speed,
-@@ -2895,6 +2899,7 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
+@@ -2894,6 +2898,7 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
                                     Error **errp)
  {
      int job_flags = JOB_DEFAULT;
@@ -271,7 +271,7 @@ index 3c427fc4be..28ed750ba5 100644
  
      if (!has_speed) {
          speed = 0;
-@@ -2949,6 +2954,29 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
+@@ -2948,6 +2953,29 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
          sync = MIRROR_SYNC_MODE_FULL;
      }
  
@@ -301,7 +301,7 @@ index 3c427fc4be..28ed750ba5 100644
      if (has_replaces) {
          BlockDriverState *to_replace_bs;
          AioContext *replace_aio_context;
-@@ -2986,8 +3014,8 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
+@@ -2985,8 +3013,8 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
       * and will allow to check whether the node still exist at mirror completion
       */
      mirror_start(job_id, bs, target,
@@ -312,7 +312,7 @@ index 3c427fc4be..28ed750ba5 100644
                   on_source_error, on_target_error, unmap, filter_node_name,
                   copy_mode, errp);
  }
-@@ -3128,6 +3156,8 @@ void qmp_drive_mirror(DriveMirror *arg, Error **errp)
+@@ -3127,6 +3155,8 @@ void qmp_drive_mirror(DriveMirror *arg, Error **errp)
  
      blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs,
                             arg->has_replaces, arg->replaces, arg->sync,
@@ -321,7 +321,7 @@ index 3c427fc4be..28ed750ba5 100644
                             backing_mode, zero_target,
                             arg->has_speed, arg->speed,
                             arg->has_granularity, arg->granularity,
-@@ -3149,6 +3179,8 @@ void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
+@@ -3148,6 +3178,8 @@ void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
                           const char *device, const char *target,
                           bool has_replaces, const char *replaces,
                           MirrorSyncMode sync,
@@ -330,7 +330,7 @@ index 3c427fc4be..28ed750ba5 100644
                           bool has_speed, int64_t speed,
                           bool has_granularity, uint32_t granularity,
                           bool has_buf_size, int64_t buf_size,
-@@ -3198,7 +3230,8 @@ void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
+@@ -3197,7 +3229,8 @@ void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
      }
  
      blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs,
@@ -341,7 +341,7 @@ index 3c427fc4be..28ed750ba5 100644
                             has_granularity, granularity,
                             has_buf_size, buf_size,
 diff --git a/include/block/block_int.h b/include/block/block_int.h
-index 5ff3b1186f..befdae125b 100644
+index 8dda6f769d..279bd4ab61 100644
 --- a/include/block/block_int.h
 +++ b/include/block/block_int.h
 @@ -1245,7 +1245,9 @@ void mirror_start(const char *job_id, BlockDriverState *bs,

debian/patches/pve/0033-mirror-add-check-for-bitmap-mode-without-bitmap.patch

@@ -15,10 +15,10 @@ Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
  1 file changed, 3 insertions(+)
 
 diff --git a/blockdev.c b/blockdev.c
-index 28ed750ba5..4665321bd8 100644
+index 02d58e7645..0d480f02c7 100644
 --- a/blockdev.c
 +++ b/blockdev.c
-@@ -2975,6 +2975,9 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
+@@ -2974,6 +2974,9 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
          if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
              return;
          }

debian/patches/pve/0036-mirror-move-some-checks-to-qmp.patch

@@ -59,10 +59,10 @@ index fb12ccb932..dfce442e97 100644
  
          if (bitmap_mode != BITMAP_SYNC_MODE_NEVER) {
 diff --git a/blockdev.c b/blockdev.c
-index 4665321bd8..1db0cbcad5 100644
+index 0d480f02c7..be87d65c02 100644
 --- a/blockdev.c
 +++ b/blockdev.c
-@@ -2954,7 +2954,36 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
+@@ -2953,7 +2953,36 @@ static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
          sync = MIRROR_SYNC_MODE_FULL;
      }
  

debian/patches/pve/0037-PVE-Backup-Add-dirty-bitmap-tracking-for-incremental.patch

@@ -132,7 +132,7 @@ index b311bf8de8..20fd6b1719 100644
  
  
 diff --git a/pve-backup.c b/pve-backup.c
-index bb917ee972..7b5558e28e 100644
+index d40f3f2fd6..d50f03a050 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
 @@ -28,6 +28,8 @@
@@ -262,7 +262,7 @@ index bb917ee972..7b5558e28e 100644
      bool has_format;
      BackupFormat format;
      bool has_config_file;
-@@ -621,6 +654,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -617,6 +650,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
      }
  
      size_t total = 0;
@@ -270,7 +270,7 @@ index bb917ee972..7b5558e28e 100644
  
      l = di_list;
      while (l) {
-@@ -658,6 +692,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -654,6 +688,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
          int dump_cb_block_size = PROXMOX_BACKUP_DEFAULT_CHUNK_SIZE; // Hardcoded (4M)
          firewall_name = "fw.conf";
  
@@ -279,7 +279,7 @@ index bb917ee972..7b5558e28e 100644
          char *pbs_err = NULL;
          pbs = proxmox_backup_new(
              task->backup_file,
-@@ -677,7 +713,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -673,7 +709,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              goto err;
          }
  
@@ -289,7 +289,7 @@ index bb917ee972..7b5558e28e 100644
              goto err;
  
          /* register all devices */
-@@ -688,9 +725,32 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -684,9 +721,32 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
  
              const char *devname = bdrv_get_device_name(di->bs);
  
@@ -324,7 +324,7 @@ index bb917ee972..7b5558e28e 100644
  
              if (!(di->target = bdrv_backup_dump_create(dump_cb_block_size, di->size, pvebackup_co_dump_pbs_cb, di, task->errp))) {
                  goto err;
-@@ -699,6 +759,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -695,6 +755,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              di->dev_id = dev_id;
          }
      } else if (format == BACKUP_FORMAT_VMA) {
@@ -333,7 +333,7 @@ index bb917ee972..7b5558e28e 100644
          vmaw = vma_writer_create(task->backup_file, uuid, &local_err);
          if (!vmaw) {
              if (local_err) {
-@@ -726,6 +788,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -722,6 +784,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              }
          }
      } else if (format == BACKUP_FORMAT_DIR) {
@@ -342,7 +342,7 @@ index bb917ee972..7b5558e28e 100644
          if (mkdir(task->backup_file, 0640) != 0) {
              error_setg_errno(task->errp, errno, "can't create directory '%s'\n",
                               task->backup_file);
-@@ -798,8 +862,10 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -794,8 +858,10 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
      char *uuid_str = g_strdup(backup_state.stat.uuid_str);
  
      backup_state.stat.total = total;
@@ -353,7 +353,7 @@ index bb917ee972..7b5558e28e 100644
  
      qemu_mutex_unlock(&backup_state.stat.lock);
  
-@@ -823,6 +889,10 @@ err:
+@@ -819,6 +885,10 @@ err:
          PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
          l = g_list_next(l);
  
@@ -364,7 +364,7 @@ index bb917ee972..7b5558e28e 100644
          if (di->target) {
              bdrv_unref(di->target);
          }
-@@ -864,6 +934,7 @@ UuidInfo *qmp_backup(
+@@ -860,6 +930,7 @@ UuidInfo *qmp_backup(
      bool has_fingerprint, const char *fingerprint,
      bool has_backup_id, const char *backup_id,
      bool has_backup_time, int64_t backup_time,
@@ -372,7 +372,7 @@ index bb917ee972..7b5558e28e 100644
      bool has_format, BackupFormat format,
      bool has_config_file, const char *config_file,
      bool has_firewall_file, const char *firewall_file,
-@@ -882,6 +953,8 @@ UuidInfo *qmp_backup(
+@@ -878,6 +949,8 @@ UuidInfo *qmp_backup(
          .backup_id = backup_id,
          .has_backup_time = has_backup_time,
          .backup_time = backup_time,
@@ -381,7 +381,7 @@ index bb917ee972..7b5558e28e 100644
          .has_format = has_format,
          .format = format,
          .has_config_file = has_config_file,
-@@ -950,10 +1023,14 @@ BackupStatus *qmp_query_backup(Error **errp)
+@@ -946,10 +1019,14 @@ BackupStatus *qmp_query_backup(Error **errp)
  
      info->has_total = true;
      info->total = backup_state.stat.total;

debian/patches/pve/0038-PVE-backup-rename-incremental-to-use-dirty-bitmap.patch

@@ -11,7 +11,7 @@ Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
  2 files changed, 14 insertions(+), 14 deletions(-)
 
 diff --git a/pve-backup.c b/pve-backup.c
-index 7b5558e28e..9e767d724c 100644
+index d50f03a050..7bf54b4c5d 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
 @@ -557,8 +557,8 @@ typedef struct QmpBackupTask {
@@ -25,7 +25,7 @@ index 7b5558e28e..9e767d724c 100644
      bool has_format;
      BackupFormat format;
      bool has_config_file;
-@@ -692,7 +692,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -688,7 +688,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
          int dump_cb_block_size = PROXMOX_BACKUP_DEFAULT_CHUNK_SIZE; // Hardcoded (4M)
          firewall_name = "fw.conf";
  
@@ -34,7 +34,7 @@ index 7b5558e28e..9e767d724c 100644
  
          char *pbs_err = NULL;
          pbs = proxmox_backup_new(
-@@ -726,9 +726,9 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -722,9 +722,9 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              const char *devname = bdrv_get_device_name(di->bs);
  
              BdrvDirtyBitmap *bitmap = bdrv_find_dirty_bitmap(di->bs, PBS_BITMAP_NAME);
@@ -46,7 +46,7 @@ index 7b5558e28e..9e767d724c 100644
                  if (bitmap == NULL) {
                      bitmap = bdrv_create_dirty_bitmap(di->bs, dump_cb_block_size, PBS_BITMAP_NAME, task->errp);
                      if (!bitmap) {
-@@ -738,7 +738,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -734,7 +734,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
                      bdrv_set_dirty_bitmap(bitmap, 0, di->size);
                      dirty += di->size;
                  } else {
@@ -55,7 +55,7 @@ index 7b5558e28e..9e767d724c 100644
                      dirty += bdrv_get_dirty_count(bitmap);
                  }
                  di->bitmap = bitmap;
-@@ -747,7 +747,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -743,7 +743,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
                  bdrv_release_dirty_bitmap(bitmap);
              }
  
@@ -64,7 +64,7 @@ index 7b5558e28e..9e767d724c 100644
              if (dev_id < 0) {
                  goto err;
              }
-@@ -865,7 +865,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -861,7 +861,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
      backup_state.stat.dirty = dirty;
      backup_state.stat.transferred = 0;
      backup_state.stat.zero_bytes = 0;
@@ -73,7 +73,7 @@ index 7b5558e28e..9e767d724c 100644
  
      qemu_mutex_unlock(&backup_state.stat.lock);
  
-@@ -934,7 +934,7 @@ UuidInfo *qmp_backup(
+@@ -930,7 +930,7 @@ UuidInfo *qmp_backup(
      bool has_fingerprint, const char *fingerprint,
      bool has_backup_id, const char *backup_id,
      bool has_backup_time, int64_t backup_time,
@@ -82,7 +82,7 @@ index 7b5558e28e..9e767d724c 100644
      bool has_format, BackupFormat format,
      bool has_config_file, const char *config_file,
      bool has_firewall_file, const char *firewall_file,
-@@ -953,8 +953,8 @@ UuidInfo *qmp_backup(
+@@ -949,8 +949,8 @@ UuidInfo *qmp_backup(
          .backup_id = backup_id,
          .has_backup_time = has_backup_time,
          .backup_time = backup_time,

debian/patches/pve/0040-PVE-always-set-dirty-counter-for-non-incremental-bac.patch

@@ -9,10 +9,10 @@ Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
  1 file changed, 6 insertions(+), 2 deletions(-)
 
 diff --git a/pve-backup.c b/pve-backup.c
-index 9e767d724c..c108f6a745 100644
+index 7bf54b4c5d..1f2a0bbe8c 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
-@@ -742,9 +742,13 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -738,9 +738,13 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
                      dirty += bdrv_get_dirty_count(bitmap);
                  }
                  di->bitmap = bitmap;

debian/patches/pve/0041-PVE-use-proxmox_backup_check_incremental.patch

@@ -10,10 +10,10 @@ Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
  1 file changed, 8 insertions(+), 4 deletions(-)
 
 diff --git a/pve-backup.c b/pve-backup.c
-index c108f6a745..aa62a1da16 100644
+index 1f2a0bbe8c..1cd9d31d7c 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
-@@ -734,12 +734,16 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -730,12 +730,16 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
                      if (!bitmap) {
                          goto err;
                      }

debian/patches/pve/0042-PVE-fixup-pbs-backup-add-compress-and-encrypt-option.patch

@@ -25,7 +25,7 @@ index fdc85a5c0e..43aa87487b 100644
          false, NULL, false, NULL, !!devlist,
          devlist, qdict_haskey(qdict, "speed"), speed, &error);
 diff --git a/pve-backup.c b/pve-backup.c
-index aa62a1da16..343035b5c9 100644
+index 1cd9d31d7c..bfb648d6b5 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
 @@ -567,6 +567,10 @@ typedef struct QmpBackupTask {
@@ -39,7 +39,7 @@ index aa62a1da16..343035b5c9 100644
      bool has_speed;
      int64_t speed;
      Error **errp;
-@@ -694,6 +698,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -690,6 +694,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
  
          bool use_dirty_bitmap = task->has_use_dirty_bitmap && task->use_dirty_bitmap;
  
@@ -47,7 +47,7 @@ index aa62a1da16..343035b5c9 100644
          char *pbs_err = NULL;
          pbs = proxmox_backup_new(
              task->backup_file,
-@@ -703,8 +708,10 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -699,8 +704,10 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              task->has_password ? task->password : NULL,
              task->has_keyfile ? task->keyfile : NULL,
              task->has_key_password ? task->key_password : NULL,
@@ -59,7 +59,7 @@ index aa62a1da16..343035b5c9 100644
  
          if (!pbs) {
              error_set(task->errp, ERROR_CLASS_GENERIC_ERROR,
-@@ -943,6 +950,8 @@ UuidInfo *qmp_backup(
+@@ -939,6 +946,8 @@ UuidInfo *qmp_backup(
      bool has_backup_id, const char *backup_id,
      bool has_backup_time, int64_t backup_time,
      bool has_use_dirty_bitmap, bool use_dirty_bitmap,
@@ -68,7 +68,7 @@ index aa62a1da16..343035b5c9 100644
      bool has_format, BackupFormat format,
      bool has_config_file, const char *config_file,
      bool has_firewall_file, const char *firewall_file,
-@@ -971,6 +980,8 @@ UuidInfo *qmp_backup(
+@@ -967,6 +976,8 @@ UuidInfo *qmp_backup(
          .firewall_file = firewall_file,
          .has_devlist = has_devlist,
          .devlist = devlist,

debian/patches/pve/0044-PVE-add-query_proxmox_support-QMP-command.patch

@@ -14,10 +14,10 @@ Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
  2 files changed, 29 insertions(+)
 
 diff --git a/pve-backup.c b/pve-backup.c
-index 343035b5c9..b0e7b51eef 100644
+index bfb648d6b5..2539ae1520 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
-@@ -1055,3 +1055,10 @@ BackupStatus *qmp_query_backup(Error **errp)
+@@ -1051,3 +1051,10 @@ BackupStatus *qmp_query_backup(Error **errp)
  
      return info;
  }

debian/patches/pve/0045-pbs-fix-missing-crypt-and-compress-parameters.patch

@@ -9,10 +9,10 @@ Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
  1 file changed, 6 insertions(+), 2 deletions(-)
 
 diff --git a/pve-backup.c b/pve-backup.c
-index b0e7b51eef..77eb475563 100644
+index 2539ae1520..0e293a4f5e 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
-@@ -962,6 +962,8 @@ UuidInfo *qmp_backup(
+@@ -958,6 +958,8 @@ UuidInfo *qmp_backup(
          .backup_file = backup_file,
          .has_password = has_password,
          .password = password,
@@ -21,7 +21,7 @@ index b0e7b51eef..77eb475563 100644
          .has_key_password = has_key_password,
          .key_password = key_password,
          .has_fingerprint = has_fingerprint,
-@@ -972,6 +974,10 @@ UuidInfo *qmp_backup(
+@@ -968,6 +970,10 @@ UuidInfo *qmp_backup(
          .backup_time = backup_time,
          .has_use_dirty_bitmap = has_use_dirty_bitmap,
          .use_dirty_bitmap = use_dirty_bitmap,
@@ -32,7 +32,7 @@ index b0e7b51eef..77eb475563 100644
          .has_format = has_format,
          .format = format,
          .has_config_file = has_config_file,
-@@ -980,8 +986,6 @@ UuidInfo *qmp_backup(
+@@ -976,8 +982,6 @@ UuidInfo *qmp_backup(
          .firewall_file = firewall_file,
          .has_devlist = has_devlist,
          .devlist = devlist,

debian/patches/pve/0046-PVE-handle-PBS-write-callback-with-big-blocks-correc.patch

@@ -17,7 +17,7 @@ Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
  1 file changed, 22 insertions(+), 8 deletions(-)
 
 diff --git a/pve-backup.c b/pve-backup.c
-index 77eb475563..40d8136f1a 100644
+index 0e293a4f5e..8999692418 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
 @@ -67,6 +67,7 @@ opts_init(pvebackup_init);
@@ -65,7 +65,7 @@ index 77eb475563..40d8136f1a 100644
      return size;
  }
  
-@@ -730,6 +742,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -726,6 +738,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
              l = g_list_next(l);
  

debian/patches/pve/0047-PVE-add-zero-block-handling-to-PBS-dump-callback.patch

@@ -20,7 +20,7 @@ Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
  1 file changed, 9 insertions(+), 5 deletions(-)
 
 diff --git a/pve-backup.c b/pve-backup.c
-index 40d8136f1a..7c99554514 100644
+index 8999692418..562fcc20f7 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
 @@ -8,6 +8,7 @@

debian/patches/pve/0048-PVE-add-query-pbs-bitmap-info-QMP-call.patch

@@ -68,7 +68,7 @@ index 3ff014d32a..c3227a1498 100644
                             info->zero_bytes, zero_per);
  
 diff --git a/pve-backup.c b/pve-backup.c
-index 7c99554514..c6d8a51406 100644
+index 562fcc20f7..04c21c80aa 100644
 --- a/pve-backup.c
 +++ b/pve-backup.c
 @@ -46,6 +46,7 @@ static struct PVEBackupState {
@@ -79,7 +79,7 @@ index 7c99554514..c6d8a51406 100644
      } stat;
      int64_t speed;
      VmaWriter *vmaw;
-@@ -674,7 +675,6 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -670,7 +671,6 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
      }
  
      size_t total = 0;
@@ -87,7 +87,7 @@ index 7c99554514..c6d8a51406 100644
  
      l = di_list;
      while (l) {
-@@ -695,18 +695,33 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -691,18 +691,33 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
  
      uuid_generate(uuid);
  
@@ -124,7 +124,7 @@ index 7c99554514..c6d8a51406 100644
          }
  
          int dump_cb_block_size = PROXMOX_BACKUP_DEFAULT_CHUNK_SIZE; // Hardcoded (4M)
-@@ -733,12 +748,12 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -729,12 +744,12 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              error_set(task->errp, ERROR_CLASS_GENERIC_ERROR,
                        "proxmox_backup_new failed: %s", pbs_err);
              proxmox_backup_free_error(pbs_err);
@@ -139,7 +139,7 @@ index 7c99554514..c6d8a51406 100644
  
          /* register all devices */
          l = di_list;
-@@ -749,6 +764,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -745,6 +760,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              di->block_size = dump_cb_block_size;
  
              const char *devname = bdrv_get_device_name(di->bs);
@@ -148,7 +148,7 @@ index 7c99554514..c6d8a51406 100644
  
              BdrvDirtyBitmap *bitmap = bdrv_find_dirty_bitmap(di->bs, PBS_BITMAP_NAME);
              bool expect_only_dirty = false;
-@@ -757,49 +774,59 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -753,49 +770,59 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
                  if (bitmap == NULL) {
                      bitmap = bdrv_create_dirty_bitmap(di->bs, dump_cb_block_size, PBS_BITMAP_NAME, task->errp);
                      if (!bitmap) {
@@ -218,7 +218,7 @@ index 7c99554514..c6d8a51406 100644
          }
  
          /* register all devices for vma writer */
-@@ -809,7 +836,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -805,7 +832,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              l = g_list_next(l);
  
              if (!(di->target = bdrv_backup_dump_create(VMA_CLUSTER_SIZE, di->size, pvebackup_co_dump_vma_cb, di, task->errp))) {
@@ -227,7 +227,7 @@ index 7c99554514..c6d8a51406 100644
              }
  
              const char *devname = bdrv_get_device_name(di->bs);
-@@ -817,16 +844,14 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -813,16 +840,14 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
              if (di->dev_id <= 0) {
                  error_set(task->errp, ERROR_CLASS_GENERIC_ERROR,
                            "register_stream failed");
@@ -246,7 +246,7 @@ index 7c99554514..c6d8a51406 100644
          }
          backup_dir = task->backup_file;
  
-@@ -843,18 +868,18 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -839,18 +864,18 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
                              di->size, flags, false, &local_err);
              if (local_err) {
                  error_propagate(task->errp, local_err);
@@ -268,7 +268,7 @@ index 7c99554514..c6d8a51406 100644
      }
  
  
-@@ -862,7 +887,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -858,7 +883,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
      if (task->has_config_file) {
          if (pvebackup_co_add_config(task->config_file, config_name, format, backup_dir,
                                      vmaw, pbs, task->errp) != 0) {
@@ -277,7 +277,7 @@ index 7c99554514..c6d8a51406 100644
          }
      }
  
-@@ -870,12 +895,11 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -866,12 +891,11 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
      if (task->has_firewall_file) {
          if (pvebackup_co_add_config(task->firewall_file, firewall_name, format, backup_dir,
                                      vmaw, pbs, task->errp) != 0) {
@@ -292,7 +292,7 @@ index 7c99554514..c6d8a51406 100644
  
      if (backup_state.stat.error) {
          error_free(backup_state.stat.error);
-@@ -895,10 +919,9 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -891,10 +915,9 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
      char *uuid_str = g_strdup(backup_state.stat.uuid_str);
  
      backup_state.stat.total = total;
@@ -304,7 +304,7 @@ index 7c99554514..c6d8a51406 100644
  
      qemu_mutex_unlock(&backup_state.stat.lock);
  
-@@ -915,6 +938,9 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+@@ -911,6 +934,9 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
      task->result = uuid_info;
      return;
  
@@ -314,7 +314,7 @@ index 7c99554514..c6d8a51406 100644
  err:
  
      l = di_list;
-@@ -1078,9 +1104,40 @@ BackupStatus *qmp_query_backup(Error **errp)
+@@ -1074,9 +1100,40 @@ BackupStatus *qmp_query_backup(Error **errp)
      return info;
  }
  

debian/patches/pve/0049-PVE-redirect-stderr-to-journal-when-daemonized.patch

@@ -11,10 +11,10 @@ fitting.
  2 files changed, 6 insertions(+), 2 deletions(-)
 
 diff --git a/Makefile.objs b/Makefile.objs
-index b7d58e592e..105f23bff7 100644
+index 240eb503f2..c7ba4e11e7 100644
 --- a/Makefile.objs
 +++ b/Makefile.objs
-@@ -55,6 +55,7 @@ common-obj-y += net/
+@@ -54,6 +54,7 @@ common-obj-y += net/
  common-obj-y += qdev-monitor.o
  common-obj-$(CONFIG_WIN32) += os-win32.o
  common-obj-$(CONFIG_POSIX) += os-posix.o
@@ -23,7 +23,7 @@ index b7d58e592e..105f23bff7 100644
  common-obj-$(CONFIG_LINUX) += fsdev/
  
 diff --git a/os-posix.c b/os-posix.c
-index 3cd52e1e70..ab4d052c62 100644
+index 3572db3f44..b45dde63ac 100644
 --- a/os-posix.c
 +++ b/os-posix.c
 @@ -28,6 +28,8 @@
@@ -35,7 +35,7 @@ index 3cd52e1e70..ab4d052c62 100644
  
  #include "qemu-common.h"
  /* Needed early for CONFIG_BSD etc. */
-@@ -309,9 +311,10 @@ void os_setup_post(void)
+@@ -312,9 +314,10 @@ void os_setup_post(void)
  
          dup2(fd, 0);
          dup2(fd, 1);

debian/patches/pve/0050-PVE-Add-sequential-job-transaction-support.patch

@@ -0,0 +1,82 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Stefan Reiter <s.reiter@proxmox.com>
+Date: Thu, 20 Aug 2020 14:31:59 +0200
+Subject: [PATCH] PVE: Add sequential job transaction support
+
+---
+ include/qemu/job.h | 12 ++++++++++++
+ job.c              | 24 ++++++++++++++++++++++++
+ 2 files changed, 36 insertions(+)
+
+diff --git a/include/qemu/job.h b/include/qemu/job.h
+index 32aabb1c60..f7a6a0926a 100644
+--- a/include/qemu/job.h
++++ b/include/qemu/job.h
+@@ -280,6 +280,18 @@ typedef enum JobCreateFlags {
+  */
+ JobTxn *job_txn_new(void);
+ 
++/**
++ * Create a new transaction and set it to sequential mode, i.e. run all jobs
++ * one after the other instead of at the same time.
++ */
++JobTxn *job_txn_new_seq(void);
++
++/**
++ * Helper method to start the first job in a sequential transaction to kick it
++ * off. Other jobs will be run after this one completes.
++ */
++void job_txn_start_seq(JobTxn *txn);
++
+ /**
+  * Release a reference that was previously acquired with job_txn_add_job or
+  * job_txn_new. If it's the last reference to the object, it will be freed.
+diff --git a/job.c b/job.c
+index b8139c80a4..97ee97a192 100644
+--- a/job.c
++++ b/job.c
+@@ -72,6 +72,8 @@ struct JobTxn {
+ 
+     /* Reference count */
+     int refcnt;
++
++    bool sequential;
+ };
+ 
+ /* Right now, this mutex is only needed to synchronize accesses to job->busy
+@@ -102,6 +104,25 @@ JobTxn *job_txn_new(void)
+     return txn;
+ }
+ 
++JobTxn *job_txn_new_seq(void)
++{
++    JobTxn *txn = job_txn_new();
++    txn->sequential = true;
++    return txn;
++}
++
++void job_txn_start_seq(JobTxn *txn)
++{
++    assert(txn->sequential);
++    assert(!txn->aborting);
++
++    Job *first = QLIST_FIRST(&txn->jobs);
++    assert(first);
++    assert(first->status == JOB_STATUS_CREATED);
++
++    job_start(first);
++}
++
+ static void job_txn_ref(JobTxn *txn)
+ {
+     txn->refcnt++;
+@@ -841,6 +862,9 @@ static void job_completed_txn_success(Job *job)
+      */
+     QLIST_FOREACH(other_job, &txn->jobs, txn_list) {
+         if (!job_is_completed(other_job)) {
++            if (txn->sequential) {
++                job_start(other_job);
++            }
+             return;
+         }
+         assert(other_job->ret == 0);

debian/patches/pve/0051-PVE-Backup-Use-a-transaction-to-synchronize-job-stat.patch

@@ -0,0 +1,290 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Stefan Reiter <s.reiter@proxmox.com>
+Date: Thu, 20 Aug 2020 14:25:00 +0200
+Subject: [PATCH] PVE-Backup: Use a transaction to synchronize job states
+
+By using a JobTxn, we can sync dirty bitmaps only when *all* jobs were
+successful - meaning we don't need to remove them when the backup fails,
+since QEMU's BITMAP_SYNC_MODE_ON_SUCCESS will now handle that for us.
+
+To keep the rate-limiting and IO impact from before, we use a sequential
+transaction, so drives will still be backed up one after the other.
+---
+ pve-backup.c | 167 +++++++++++++++------------------------------------
+ 1 file changed, 49 insertions(+), 118 deletions(-)
+
+diff --git a/pve-backup.c b/pve-backup.c
+index 04c21c80aa..9562e9c98d 100644
+--- a/pve-backup.c
++++ b/pve-backup.c
+@@ -52,6 +52,7 @@ static struct PVEBackupState {
+     VmaWriter *vmaw;
+     ProxmoxBackupHandle *pbs;
+     GList *di_list;
++    JobTxn *txn;
+     QemuMutex backup_mutex;
+     CoMutex dump_callback_mutex;
+ } backup_state;
+@@ -71,32 +72,12 @@ typedef struct PVEBackupDevInfo {
+     size_t size;
+     uint64_t block_size;
+     uint8_t dev_id;
+-    bool completed;
+     char targetfile[PATH_MAX];
+     BdrvDirtyBitmap *bitmap;
+     BlockDriverState *target;
++    BlockJob *job;
+ } PVEBackupDevInfo;
+ 
+-static void pvebackup_run_next_job(void);
+-
+-static BlockJob *
+-lookup_active_block_job(PVEBackupDevInfo *di)
+-{
+-    if (!di->completed && di->bs) {
+-        for (BlockJob *job = block_job_next(NULL); job; job = block_job_next(job)) {
+-            if (job->job.driver->job_type != JOB_TYPE_BACKUP) {
+-                continue;
+-            }
+-
+-            BackupBlockJob *bjob = container_of(job, BackupBlockJob, common);
+-            if (bjob && bjob->source_bs == di->bs) {
+-                return job;
+-            }
+-        }
+-    }
+-    return NULL;
+-}
+-
+ static void pvebackup_propagate_error(Error *err)
+ {
+     qemu_mutex_lock(&backup_state.stat.lock);
+@@ -272,18 +253,6 @@ static void coroutine_fn pvebackup_co_cleanup(void *unused)
+             if (local_err != NULL) {
+                 pvebackup_propagate_error(local_err);
+             }
+-        } else {
+-            // on error or cancel we cannot ensure synchronization of dirty
+-            // bitmaps with backup server, so remove all and do full backup next
+-            GList *l = backup_state.di_list;
+-            while (l) {
+-                PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
+-                l = g_list_next(l);
+-
+-                if (di->bitmap) {
+-                    bdrv_release_dirty_bitmap(di->bitmap);
+-                }
+-            }
+         }
+ 
+         proxmox_backup_disconnect(backup_state.pbs);
+@@ -322,8 +291,6 @@ static void pvebackup_complete_cb(void *opaque, int ret)
+ 
+     qemu_mutex_lock(&backup_state.backup_mutex);
+ 
+-    di->completed = true;
+-
+     if (ret < 0) {
+         Error *local_err = NULL;
+         error_setg(&local_err, "job failed with err %d - %s", ret, strerror(-ret));
+@@ -336,20 +303,17 @@ static void pvebackup_complete_cb(void *opaque, int ret)
+ 
+     block_on_coroutine_fn(pvebackup_complete_stream, di);
+ 
+-    // remove self from job queue
++    // remove self from job list
+     backup_state.di_list = g_list_remove(backup_state.di_list, di);
+ 
+-    if (di->bitmap && ret < 0) {
+-        // on error or cancel we cannot ensure synchronization of dirty
+-        // bitmaps with backup server, so remove all and do full backup next
+-        bdrv_release_dirty_bitmap(di->bitmap);
+-    }
+-
+     g_free(di);
+ 
+-    qemu_mutex_unlock(&backup_state.backup_mutex);
++    /* call cleanup if we're the last job */
++    if (!g_list_first(backup_state.di_list)) {
++        block_on_coroutine_fn(pvebackup_co_cleanup, NULL);
++    }
+ 
+-    pvebackup_run_next_job();
++    qemu_mutex_unlock(&backup_state.backup_mutex);
+ }
+ 
+ static void pvebackup_cancel(void)
+@@ -371,36 +335,28 @@ static void pvebackup_cancel(void)
+         proxmox_backup_abort(backup_state.pbs, "backup canceled");
+     }
+ 
+-    qemu_mutex_unlock(&backup_state.backup_mutex);
+-
+-    for(;;) {
+-
+-        BlockJob *next_job = NULL;
+-
+-        qemu_mutex_lock(&backup_state.backup_mutex);
+-
+-        GList *l = backup_state.di_list;
+-        while (l) {
+-            PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
+-            l = g_list_next(l);
++    /* it's enough to cancel one job in the transaction, the rest will follow
++     * automatically */
++    GList *bdi = g_list_first(backup_state.di_list);
++    BlockJob *cancel_job = bdi && bdi->data ?
++        ((PVEBackupDevInfo *)bdi->data)->job :
++        NULL;
+ 
+-            BlockJob *job = lookup_active_block_job(di);
+-            if (job != NULL) {
+-                next_job = job;
+-                break;
+-            }
+-        }
++    /* ref the job before releasing the mutex, just to be safe */
++    if (cancel_job) {
++        job_ref(&cancel_job->job);
++    }
+ 
+-        qemu_mutex_unlock(&backup_state.backup_mutex);
++    /* job_cancel_sync may enter the job, so we need to release the
++     * backup_mutex to avoid deadlock */
++    qemu_mutex_unlock(&backup_state.backup_mutex);
+ 
+-        if (next_job) {
+-            AioContext *aio_context = next_job->job.aio_context;
+-            aio_context_acquire(aio_context);
+-            job_cancel_sync(&next_job->job);
+-            aio_context_release(aio_context);
+-        } else {
+-            break;
+-        }
++    if (cancel_job) {
++        AioContext *aio_context = cancel_job->job.aio_context;
++        aio_context_acquire(aio_context);
++        job_cancel_sync(&cancel_job->job);
++        job_unref(&cancel_job->job);
++        aio_context_release(aio_context);
+     }
+ }
+ 
+@@ -459,51 +415,19 @@ static int coroutine_fn pvebackup_co_add_config(
+     goto out;
+ }
+ 
+-bool job_should_pause(Job *job);
+-
+-static void pvebackup_run_next_job(void)
+-{
+-    assert(!qemu_in_coroutine());
+-
+-    qemu_mutex_lock(&backup_state.backup_mutex);
+-
+-    GList *l = backup_state.di_list;
+-    while (l) {
+-        PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
+-        l = g_list_next(l);
+-
+-        BlockJob *job = lookup_active_block_job(di);
+-
+-        if (job) {
+-            qemu_mutex_unlock(&backup_state.backup_mutex);
+-
+-            AioContext *aio_context = job->job.aio_context;
+-            aio_context_acquire(aio_context);
+-
+-            if (job_should_pause(&job->job)) {
+-                bool error_or_canceled = pvebackup_error_or_canceled();
+-                if (error_or_canceled) {
+-                    job_cancel_sync(&job->job);
+-                } else {
+-                    job_resume(&job->job);
+-                }
+-            }
+-            aio_context_release(aio_context);
+-            return;
+-        }
+-    }
+-
+-    block_on_coroutine_fn(pvebackup_co_cleanup, NULL); // no more jobs, run cleanup
+-
+-    qemu_mutex_unlock(&backup_state.backup_mutex);
+-}
+-
+ static bool create_backup_jobs(void) {
+ 
+     assert(!qemu_in_coroutine());
+ 
+     Error *local_err = NULL;
+ 
++    /* create job transaction to synchronize bitmap commit and cancel all
++     * jobs in case one errors */
++    if (backup_state.txn) {
++        job_txn_unref(backup_state.txn);
++    }
++    backup_state.txn = job_txn_new_seq();
++
+     /* create and start all jobs (paused state) */
+     GList *l =  backup_state.di_list;
+     while (l) {
+@@ -524,7 +448,7 @@ static bool create_backup_jobs(void) {
+         BlockJob *job = backup_job_create(
+             NULL, di->bs, di->target, backup_state.speed, sync_mode, di->bitmap,
+             bitmap_mode, false, NULL, BLOCKDEV_ON_ERROR_REPORT, BLOCKDEV_ON_ERROR_REPORT,
+-            JOB_DEFAULT, pvebackup_complete_cb, di, 1, NULL, &local_err);
++            JOB_DEFAULT, pvebackup_complete_cb, di, backup_state.txn, &local_err);
+ 
+         aio_context_release(aio_context);
+ 
+@@ -536,7 +460,8 @@ static bool create_backup_jobs(void) {
+             pvebackup_propagate_error(create_job_err);
+             break;
+         }
+-        job_start(&job->job);
++
++        di->job = job;
+ 
+         bdrv_unref(di->target);
+         di->target = NULL;
+@@ -554,6 +479,10 @@ static bool create_backup_jobs(void) {
+                 bdrv_unref(di->target);
+                 di->target = NULL;
+             }
++
++            if (di->job) {
++                job_unref(&di->job->job);
++            }
+         }
+     }
+ 
+@@ -944,10 +873,6 @@ err:
+         PVEBackupDevInfo *di = (PVEBackupDevInfo *)l->data;
+         l = g_list_next(l);
+ 
+-        if (di->bitmap) {
+-            bdrv_release_dirty_bitmap(di->bitmap);
+-        }
+-
+         if (di->target) {
+             bdrv_unref(di->target);
+         }
+@@ -1036,9 +961,15 @@ UuidInfo *qmp_backup(
+     block_on_coroutine_fn(pvebackup_co_prepare, &task);
+ 
+     if (*errp == NULL) {
+-        create_backup_jobs();
++        bool errors = create_backup_jobs();
+         qemu_mutex_unlock(&backup_state.backup_mutex);
+-        pvebackup_run_next_job();
++
++        if (!errors) {
++            /* start the first job in the transaction
++             * note: this might directly enter the job, so we need to do this
++             * after unlocking the backup_mutex */
++            job_txn_start_seq(backup_state.txn);
++        }
+     } else {
+         qemu_mutex_unlock(&backup_state.backup_mutex);
+     }

debian/patches/pve/0052-PVE-Backup-Use-more-coroutines-and-don-t-block-on-fi.patch

@@ -0,0 +1,363 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Stefan Reiter <s.reiter@proxmox.com>
+Date: Mon, 28 Sep 2020 13:40:51 +0200
+Subject: [PATCH] PVE-Backup: Use more coroutines and don't block on finishing
+
+proxmox_backup_co_finish is already async, but previously we would wait
+for the coroutine using block_on_coroutine_fn(). Avoid this by
+scheduling pvebackup_co_complete_stream (and thus pvebackup_co_cleanup)
+as a real coroutine when calling from pvebackup_complete_cb. This is ok,
+since complete_stream uses the backup_mutex internally to synchronize,
+and other streams can happily continue writing in the meantime anyway.
+
+To accomodate, backup_mutex is converted to a CoMutex. This means
+converting every user to a coroutine. This is not just useful here, but
+will come in handy once this series[0] is merged, and QMP calls can be
+yield-able coroutines too. Then we can also finally get rid of
+block_on_coroutine_fn.
+
+Cases of aio_context_acquire/release from within what is now a coroutine
+are changed to aio_co_reschedule_self, which works since a running
+coroutine always holds the aio lock for the context it is running in.
+
+job_cancel_sync is changed to regular job_cancel, since job_cancel_sync
+uses AIO_WAIT_WHILE internally, which is forbidden from Coroutines.
+
+create_backup_jobs cannot be run from a coroutine, so it is run
+directly. This does however mean that it runs unlocked, as it cannot
+acquire a CoMutex (see it's comment for rational on why that's ok).
+
+To communicate the finishing state, a new property is introduced to
+query-backup: 'finishing'. A new state is explicitly not used, since
+that would break compatibility with older qemu-server versions.
+
+[0] https://lists.gnu.org/archive/html/qemu-devel/2020-09/msg03515.html
+---
+ proxmox-backup-client.h |   1 +
+ pve-backup.c            | 124 ++++++++++++++++++++++------------------
+ qapi/block-core.json    |   5 +-
+ 3 files changed, 74 insertions(+), 56 deletions(-)
+
+diff --git a/proxmox-backup-client.h b/proxmox-backup-client.h
+index 20fd6b1719..a4781c5851 100644
+--- a/proxmox-backup-client.h
++++ b/proxmox-backup-client.h
+@@ -5,6 +5,7 @@
+ #include "qemu/coroutine.h"
+ #include "proxmox-backup-qemu.h"
+ 
++// FIXME: Remove once coroutines are supported for QMP
+ void block_on_coroutine_fn(CoroutineEntry *entry, void *entry_arg);
+ 
+ int coroutine_fn
+diff --git a/pve-backup.c b/pve-backup.c
+index 9562e9c98d..53cf23ed5a 100644
+--- a/pve-backup.c
++++ b/pve-backup.c
+@@ -33,7 +33,9 @@ const char *PBS_BITMAP_NAME = "pbs-incremental-dirty-bitmap";
+ 
+ static struct PVEBackupState {
+     struct {
+-        // Everithing accessed from qmp_backup_query command is protected using lock
++        // Everything accessed from qmp_backup_query command is protected using
++        // this lock. Do NOT hold this lock for long times, as it is sometimes
++        // acquired from coroutines, and thus any wait time may block the guest.
+         QemuMutex lock;
+         Error *error;
+         time_t start_time;
+@@ -47,20 +49,21 @@ static struct PVEBackupState {
+         size_t reused;
+         size_t zero_bytes;
+         GList *bitmap_list;
++        bool finishing;
+     } stat;
+     int64_t speed;
+     VmaWriter *vmaw;
+     ProxmoxBackupHandle *pbs;
+     GList *di_list;
+     JobTxn *txn;
+-    QemuMutex backup_mutex;
++    CoMutex backup_mutex;
+     CoMutex dump_callback_mutex;
+ } backup_state;
+ 
+ static void pvebackup_init(void)
+ {
+     qemu_mutex_init(&backup_state.stat.lock);
+-    qemu_mutex_init(&backup_state.backup_mutex);
++    qemu_co_mutex_init(&backup_state.backup_mutex);
+     qemu_co_mutex_init(&backup_state.dump_callback_mutex);
+ }
+ 
+@@ -72,6 +75,7 @@ typedef struct PVEBackupDevInfo {
+     size_t size;
+     uint64_t block_size;
+     uint8_t dev_id;
++    int completed_ret; // INT_MAX if not completed
+     char targetfile[PATH_MAX];
+     BdrvDirtyBitmap *bitmap;
+     BlockDriverState *target;
+@@ -227,12 +231,12 @@ pvebackup_co_dump_vma_cb(
+ }
+ 
+ // assumes the caller holds backup_mutex
+-static void coroutine_fn pvebackup_co_cleanup(void *unused)
++static void coroutine_fn pvebackup_co_cleanup(void)
+ {
+     assert(qemu_in_coroutine());
+ 
+     qemu_mutex_lock(&backup_state.stat.lock);
+-    backup_state.stat.end_time = time(NULL);
++    backup_state.stat.finishing = true;
+     qemu_mutex_unlock(&backup_state.stat.lock);
+ 
+     if (backup_state.vmaw) {
+@@ -261,12 +265,29 @@ static void coroutine_fn pvebackup_co_cleanup(void *unused)
+ 
+     g_list_free(backup_state.di_list);
+     backup_state.di_list = NULL;
++
++    qemu_mutex_lock(&backup_state.stat.lock);
++    backup_state.stat.end_time = time(NULL);
++    backup_state.stat.finishing = false;
++    qemu_mutex_unlock(&backup_state.stat.lock);
+ }
+ 
+-// assumes the caller holds backup_mutex
+-static void coroutine_fn pvebackup_complete_stream(void *opaque)
++static void coroutine_fn pvebackup_co_complete_stream(void *opaque)
+ {
+     PVEBackupDevInfo *di = opaque;
++    int ret = di->completed_ret;
++
++    qemu_co_mutex_lock(&backup_state.backup_mutex);
++
++    if (ret < 0) {
++        Error *local_err = NULL;
++        error_setg(&local_err, "job failed with err %d - %s", ret, strerror(-ret));
++        pvebackup_propagate_error(local_err);
++    }
++
++    di->bs = NULL;
++
++    assert(di->target == NULL);
+ 
+     bool error_or_canceled = pvebackup_error_or_canceled();
+ 
+@@ -281,27 +302,6 @@ static void coroutine_fn pvebackup_complete_stream(void *opaque)
+             pvebackup_propagate_error(local_err);
+         }
+     }
+-}
+-
+-static void pvebackup_complete_cb(void *opaque, int ret)
+-{
+-    assert(!qemu_in_coroutine());
+-
+-    PVEBackupDevInfo *di = opaque;
+-
+-    qemu_mutex_lock(&backup_state.backup_mutex);
+-
+-    if (ret < 0) {
+-        Error *local_err = NULL;
+-        error_setg(&local_err, "job failed with err %d - %s", ret, strerror(-ret));
+-        pvebackup_propagate_error(local_err);
+-    }
+-
+-    di->bs = NULL;
+-
+-    assert(di->target == NULL);
+-
+-    block_on_coroutine_fn(pvebackup_complete_stream, di);
+ 
+     // remove self from job list
+     backup_state.di_list = g_list_remove(backup_state.di_list, di);
+@@ -310,21 +310,36 @@ static void pvebackup_complete_cb(void *opaque, int ret)
+ 
+     /* call cleanup if we're the last job */
+     if (!g_list_first(backup_state.di_list)) {
+-        block_on_coroutine_fn(pvebackup_co_cleanup, NULL);
++        pvebackup_co_cleanup();
+     }
+ 
+-    qemu_mutex_unlock(&backup_state.backup_mutex);
++    qemu_co_mutex_unlock(&backup_state.backup_mutex);
+ }
+ 
+-static void pvebackup_cancel(void)
++static void pvebackup_complete_cb(void *opaque, int ret)
+ {
+     assert(!qemu_in_coroutine());
+ 
++    PVEBackupDevInfo *di = opaque;
++    di->completed_ret = ret;
++
++    /*
++     * Schedule stream cleanup in async coroutine. close_image and finish might
++     * take a while, so we can't block on them here.
++     * Note: di is a pointer to an entry in the global backup_state struct, so
++     * it stays valid.
++     */
++    Coroutine *co = qemu_coroutine_create(pvebackup_co_complete_stream, di);
++    aio_co_schedule(qemu_get_aio_context(), co);
++}
++
++static void coroutine_fn pvebackup_co_cancel(void *opaque)
++{
+     Error *cancel_err = NULL;
+     error_setg(&cancel_err, "backup canceled");
+     pvebackup_propagate_error(cancel_err);
+ 
+-    qemu_mutex_lock(&backup_state.backup_mutex);
++    qemu_co_mutex_lock(&backup_state.backup_mutex);
+ 
+     if (backup_state.vmaw) {
+         /* make sure vma writer does not block anymore */
+@@ -342,27 +357,16 @@ static void pvebackup_cancel(void)
+         ((PVEBackupDevInfo *)bdi->data)->job :
+         NULL;
+ 
+-    /* ref the job before releasing the mutex, just to be safe */
+     if (cancel_job) {
+-        job_ref(&cancel_job->job);
++        job_cancel(&cancel_job->job, false);
+     }
+ 
+-    /* job_cancel_sync may enter the job, so we need to release the
+-     * backup_mutex to avoid deadlock */
+-    qemu_mutex_unlock(&backup_state.backup_mutex);
+-
+-    if (cancel_job) {
+-        AioContext *aio_context = cancel_job->job.aio_context;
+-        aio_context_acquire(aio_context);
+-        job_cancel_sync(&cancel_job->job);
+-        job_unref(&cancel_job->job);
+-        aio_context_release(aio_context);
+-    }
++    qemu_co_mutex_unlock(&backup_state.backup_mutex);
+ }
+ 
+ void qmp_backup_cancel(Error **errp)
+ {
+-    pvebackup_cancel();
++    block_on_coroutine_fn(pvebackup_co_cancel, NULL);
+ }
+ 
+ // assumes the caller holds backup_mutex
+@@ -415,6 +419,14 @@ static int coroutine_fn pvebackup_co_add_config(
+     goto out;
+ }
+ 
++/*
++ * backup_job_create can *not* be run from a coroutine (and requires an
++ * acquired AioContext), so this can't either.
++ * This does imply that this function cannot run with backup_mutex acquired.
++ * That is ok because it is only ever called between setting up the backup_state
++ * struct and starting the jobs, and from within a QMP call. This means that no
++ * other QMP call can interrupt, and no background job is running yet.
++ */
+ static bool create_backup_jobs(void) {
+ 
+     assert(!qemu_in_coroutine());
+@@ -523,11 +535,12 @@ typedef struct QmpBackupTask {
+     UuidInfo *result;
+ } QmpBackupTask;
+ 
+-// assumes the caller holds backup_mutex
+ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+ {
+     assert(qemu_in_coroutine());
+ 
++    qemu_co_mutex_lock(&backup_state.backup_mutex);
++
+     QmpBackupTask *task = opaque;
+ 
+     task->result = NULL; // just to be sure
+@@ -616,6 +629,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+         }
+         di->size = size;
+         total += size;
++
++        di->completed_ret = INT_MAX;
+     }
+ 
+     uuid_generate(uuid);
+@@ -847,6 +862,7 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+     backup_state.stat.dirty = total - backup_state.stat.reused;
+     backup_state.stat.transferred = 0;
+     backup_state.stat.zero_bytes = 0;
++    backup_state.stat.finishing = false;
+ 
+     qemu_mutex_unlock(&backup_state.stat.lock);
+ 
+@@ -861,6 +877,8 @@ static void coroutine_fn pvebackup_co_prepare(void *opaque)
+     uuid_info->UUID = uuid_str;
+ 
+     task->result = uuid_info;
++
++    qemu_co_mutex_unlock(&backup_state.backup_mutex);
+     return;
+ 
+ err_mutex:
+@@ -903,6 +921,8 @@ err:
+     }
+ 
+     task->result = NULL;
++
++    qemu_co_mutex_unlock(&backup_state.backup_mutex);
+     return;
+ }
+ 
+@@ -956,22 +976,15 @@ UuidInfo *qmp_backup(
+         .errp = errp,
+     };
+ 
+-    qemu_mutex_lock(&backup_state.backup_mutex);
+-
+     block_on_coroutine_fn(pvebackup_co_prepare, &task);
+ 
+     if (*errp == NULL) {
+         bool errors = create_backup_jobs();
+-        qemu_mutex_unlock(&backup_state.backup_mutex);
+ 
+         if (!errors) {
+-            /* start the first job in the transaction
+-             * note: this might directly enter the job, so we need to do this
+-             * after unlocking the backup_mutex */
++            // start the first job in the transaction
+             job_txn_start_seq(backup_state.txn);
+         }
+-    } else {
+-        qemu_mutex_unlock(&backup_state.backup_mutex);
+     }
+ 
+     return task.result;
+@@ -1025,6 +1038,7 @@ BackupStatus *qmp_query_backup(Error **errp)
+     info->transferred = backup_state.stat.transferred;
+     info->has_reused = true;
+     info->reused = backup_state.stat.reused;
++    info->finishing = backup_state.stat.finishing;
+ 
+     qemu_mutex_unlock(&backup_state.stat.lock);
+ 
+diff --git a/qapi/block-core.json b/qapi/block-core.json
+index 5fc42e87f3..b31ad8d989 100644
+--- a/qapi/block-core.json
++++ b/qapi/block-core.json
+@@ -784,12 +784,15 @@
+ #
+ # @uuid: uuid for this backup job
+ #
++# @finishing: if status='active' and finishing=true, then the backup process is
++#             waiting for the target to finish.
++#
+ ##
+ { 'struct': 'BackupStatus',
+   'data': {'*status': 'str', '*errmsg': 'str', '*total': 'int', '*dirty': 'int',
+            '*transferred': 'int', '*zero-bytes': 'int', '*reused': 'int',
+            '*start-time': 'int', '*end-time': 'int',
+-           '*backup-file': 'str', '*uuid': 'str' } }
++           '*backup-file': 'str', '*uuid': 'str', 'finishing': 'bool' } }
+ 
+ ##
+ # @BackupFormat:

debian/patches/series

@@ -26,28 +26,30 @@ pve/0022-PVE-Up-Config-file-posix-make-locking-optiono-on-cre.patch
 pve/0023-PVE-monitor-disable-oob-capability.patch
 pve/0024-PVE-Compat-4.0-used-balloon-qemu-4-0-config-size-fal.patch
 pve/0025-PVE-Allow-version-code-in-machine-type.patch
-pve/0026-PVE-Backup-modify-job-api.patch
-pve/0027-PVE-Backup-add-vma-backup-format-code.patch
-pve/0028-PVE-Backup-add-backup-dump-block-driver.patch
-pve/0029-PVE-Backup-proxmox-backup-patches-for-qemu.patch
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