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charset="utf-8" Mostly, satisfy pep8 complains. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Tested-by: Eric Blake --- tests/qemu-iotests/199 | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index 40774eed74..de9ba8d94c 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -28,8 +28,8 @@ disk_b =3D os.path.join(iotests.test_dir, 'disk_b') size =3D '256G' fifo =3D os.path.join(iotests.test_dir, 'mig_fifo') =20 -class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCase): =20 +class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCase): def tearDown(self): self.vm_a.shutdown() self.vm_b.shutdown() @@ -54,7 +54,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCas= e): =20 result =3D self.vm_a.qmp('block-dirty-bitmap-add', node=3D'drive0', name=3D'bitmap', granularity=3Dgranularity) - self.assert_qmp(result, 'return', {}); + self.assert_qmp(result, 'return', {}) =20 s =3D 0 while s < write_size: @@ -71,7 +71,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCas= e): =20 result =3D self.vm_a.qmp('block-dirty-bitmap-clear', node=3D'drive= 0', name=3D'bitmap') - self.assert_qmp(result, 'return', {}); + self.assert_qmp(result, 'return', {}) s =3D 0 while s < write_size: self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk)) @@ -104,15 +104,16 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTes= tCase): self.vm_b.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk)) s +=3D 0x10000 =20 - result =3D self.vm_b.qmp('query-block'); + result =3D self.vm_b.qmp('query-block') while len(result['return'][0]['dirty-bitmaps']) > 1: time.sleep(2) - result =3D self.vm_b.qmp('query-block'); + result =3D self.vm_b.qmp('query-block') =20 result =3D self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256', node=3D'drive0', name=3D'bitmap') =20 - self.assert_qmp(result, 'return/sha256', sha256); + self.assert_qmp(result, 'return/sha256', sha256) + =20 if __name__ =3D=3D '__main__': iotests.main(supported_fmts=3D['qcow2'], supported_cache_modes=3D['non= e'], --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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charset="utf-8" We don't need any specific format constraints here. Still keep qcow2 for two reasons: 1. No extra calls of format-unrelated test 2. Add some check around persistent bitmap in future (require qcow2) Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Tested-by: Eric Blake --- tests/qemu-iotests/199 | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index de9ba8d94c..dda918450a 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -116,5 +116,4 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestC= ase): =20 =20 if __name__ =3D=3D '__main__': - iotests.main(supported_fmts=3D['qcow2'], supported_cache_modes=3D['non= e'], - supported_protocols=3D['file']) + iotests.main(supported_fmts=3D['qcow2']) --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); 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charset="utf-8" The test aims to test _postcopy_ migration, and wants to do some write operations during postcopy time. Test considers migrate status=3Dcomplete event on source as start of postcopy. This is completely wrong, completion is completion of the whole migration process. Let's instead consider destination start as start of postcopy, and use RESUME event for it. Next, as migration finish, let's use migration status=3Dcomplete event on target, as such method is closer to what libvirt or another user will do, than tracking number of dirty-bitmaps. Finally, add a possibility to dump events for debug. And if set debug to True, we see, that actual postcopy period is very small relatively to the whole test duration time (~0.2 seconds to >40 seconds for me). This means, that test is very inefficient in what it supposed to do. Let's improve it in following commits. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Tested-by: Eric Blake --- tests/qemu-iotests/199 | 72 +++++++++++++++++++++++++++++++++--------- 1 file changed, 57 insertions(+), 15 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index dda918450a..dd6044768c 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -20,17 +20,43 @@ =20 import os import iotests -import time from iotests import qemu_img =20 +debug =3D False + disk_a =3D os.path.join(iotests.test_dir, 'disk_a') disk_b =3D os.path.join(iotests.test_dir, 'disk_b') size =3D '256G' fifo =3D os.path.join(iotests.test_dir, 'mig_fifo') =20 =20 +def event_seconds(event): + return event['timestamp']['seconds'] + \ + event['timestamp']['microseconds'] / 1000000.0 + + +def event_dist(e1, e2): + return event_seconds(e2) - event_seconds(e1) + + class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCase): def tearDown(self): + if debug: + self.vm_a_events +=3D self.vm_a.get_qmp_events() + self.vm_b_events +=3D self.vm_b.get_qmp_events() + for e in self.vm_a_events: + e['vm'] =3D 'SRC' + for e in self.vm_b_events: + e['vm'] =3D 'DST' + events =3D (self.vm_a_events + self.vm_b_events) + events =3D [(e['timestamp']['seconds'], + e['timestamp']['microseconds'], + e['vm'], + e['event'], + e.get('data', '')) for e in events] + for e in sorted(events): + print('{}.{:06} {} {} {}'.format(*e)) + self.vm_a.shutdown() self.vm_b.shutdown() os.remove(disk_a) @@ -47,6 +73,10 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCa= se): self.vm_a.launch() self.vm_b.launch() =20 + # collect received events for debug + self.vm_a_events =3D [] + self.vm_b_events =3D [] + def test_postcopy(self): write_size =3D 0x40000000 granularity =3D 512 @@ -77,15 +107,13 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk)) s +=3D 0x10000 =20 - bitmaps_cap =3D {'capability': 'dirty-bitmaps', 'state': True} - events_cap =3D {'capability': 'events', 'state': True} + caps =3D [{'capability': 'dirty-bitmaps', 'state': True}, + {'capability': 'events', 'state': True}] =20 - result =3D self.vm_a.qmp('migrate-set-capabilities', - capabilities=3D[bitmaps_cap, events_cap]) + result =3D self.vm_a.qmp('migrate-set-capabilities', capabilities= =3Dcaps) self.assert_qmp(result, 'return', {}) =20 - result =3D self.vm_b.qmp('migrate-set-capabilities', - capabilities=3D[bitmaps_cap]) + result =3D self.vm_b.qmp('migrate-set-capabilities', capabilities= =3Dcaps) self.assert_qmp(result, 'return', {}) =20 result =3D self.vm_a.qmp('migrate', uri=3D'exec:cat>' + fifo) @@ -94,24 +122,38 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): result =3D self.vm_a.qmp('migrate-start-postcopy') self.assert_qmp(result, 'return', {}) =20 - while True: - event =3D self.vm_a.event_wait('MIGRATION') - if event['data']['status'] =3D=3D 'completed': - break + event_resume =3D self.vm_b.event_wait('RESUME') + self.vm_b_events.append(event_resume) =20 s =3D 0x8000 while s < write_size: self.vm_b.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk)) s +=3D 0x10000 =20 + match =3D {'data': {'status': 'completed'}} + event_complete =3D self.vm_b.event_wait('MIGRATION', match=3Dmatch) + self.vm_b_events.append(event_complete) + + # take queued event, should already been happened + event_stop =3D self.vm_a.event_wait('STOP') + self.vm_a_events.append(event_stop) + + downtime =3D event_dist(event_stop, event_resume) + postcopy_time =3D event_dist(event_resume, event_complete) + + # TODO: assert downtime * 10 < postcopy_time + if debug: + print('downtime:', downtime) + print('postcopy_time:', postcopy_time) + + # Assert that bitmap migration is finished (check that successor b= itmap + # is removed) result =3D self.vm_b.qmp('query-block') - while len(result['return'][0]['dirty-bitmaps']) > 1: - time.sleep(2) - result =3D self.vm_b.qmp('query-block') + assert len(result['return'][0]['dirty-bitmaps']) =3D=3D 1 =20 + # Check content of migrated (and updated by new writes) bitmap result =3D self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256', node=3D'drive0', name=3D'bitmap') - self.assert_qmp(result, 'return/sha256', sha256) =20 =20 --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" Discard dirties dirty-bitmap as well as write, but works faster. Let's use it instead. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Tested-by: Eric Blake --- tests/qemu-iotests/199 | 31 ++++++++++++++++++++----------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index dd6044768c..190e820b84 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -67,8 +67,10 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCa= se): os.mkfifo(fifo) qemu_img('create', '-f', iotests.imgfmt, disk_a, size) qemu_img('create', '-f', iotests.imgfmt, disk_b, size) - self.vm_a =3D iotests.VM(path_suffix=3D'a').add_drive(disk_a) - self.vm_b =3D iotests.VM(path_suffix=3D'b').add_drive(disk_b) + self.vm_a =3D iotests.VM(path_suffix=3D'a').add_drive(disk_a, + 'discard=3Dunmap= ') + self.vm_b =3D iotests.VM(path_suffix=3D'b').add_drive(disk_b, + 'discard=3Dunmap= ') self.vm_b.add_incoming("exec: cat '" + fifo + "'") self.vm_a.launch() self.vm_b.launch() @@ -78,7 +80,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCas= e): self.vm_b_events =3D [] =20 def test_postcopy(self): - write_size =3D 0x40000000 + discard_size =3D 0x40000000 granularity =3D 512 chunk =3D 4096 =20 @@ -86,25 +88,32 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestC= ase): name=3D'bitmap', granularity=3Dgranularity) self.assert_qmp(result, 'return', {}) =20 + result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', + node=3D'drive0', name=3D'bitmap') + empty_sha256 =3D result['return']['sha256'] + s =3D 0 - while s < write_size: - self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk)) + while s < discard_size: + self.vm_a.hmp_qemu_io('drive0', 'discard %d %d' % (s, chunk)) s +=3D 0x10000 s =3D 0x8000 - while s < write_size: - self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk)) + while s < discard_size: + self.vm_a.hmp_qemu_io('drive0', 'discard %d %d' % (s, chunk)) s +=3D 0x10000 =20 result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', node=3D'drive0', name=3D'bitmap') sha256 =3D result['return']['sha256'] =20 + # Check, that updating the bitmap by discards works + assert sha256 !=3D empty_sha256 + result =3D self.vm_a.qmp('block-dirty-bitmap-clear', node=3D'drive= 0', name=3D'bitmap') self.assert_qmp(result, 'return', {}) s =3D 0 - while s < write_size: - self.vm_a.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk)) + while s < discard_size: + self.vm_a.hmp_qemu_io('drive0', 'discard %d %d' % (s, chunk)) s +=3D 0x10000 =20 caps =3D [{'capability': 'dirty-bitmaps', 'state': True}, @@ -126,8 +135,8 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestC= ase): self.vm_b_events.append(event_resume) =20 s =3D 0x8000 - while s < write_size: - self.vm_b.hmp_qemu_io('drive0', 'write %d %d' % (s, chunk)) + while s < discard_size: + self.vm_b.hmp_qemu_io('drive0', 'discard %d %d' % (s, chunk)) s +=3D 0x10000 =20 match =3D {'data': {'status': 'completed'}} --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" iotest 199 works too long because of many discard operations. At the same time, postcopy period is very short, in spite of all these efforts. So, let's use less discards (and with more interesting patterns) to reduce test timing. In the next commit we'll increase postcopy period. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Tested-by: Eric Blake --- tests/qemu-iotests/199 | 44 +++++++++++++++++++++++++----------------- 1 file changed, 26 insertions(+), 18 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index 190e820b84..da4dae01fb 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -30,6 +30,28 @@ size =3D '256G' fifo =3D os.path.join(iotests.test_dir, 'mig_fifo') =20 =20 +GiB =3D 1024 * 1024 * 1024 + +discards1 =3D ( + (0, GiB), + (2 * GiB + 512 * 5, 512), + (3 * GiB + 512 * 5, 512), + (100 * GiB, GiB) +) + +discards2 =3D ( + (3 * GiB + 512 * 8, 512), + (4 * GiB + 512 * 8, 512), + (50 * GiB, GiB), + (100 * GiB + GiB // 2, GiB) +) + + +def apply_discards(vm, discards): + for d in discards: + vm.hmp_qemu_io('drive0', 'discard {} {}'.format(*d)) + + def event_seconds(event): return event['timestamp']['seconds'] + \ event['timestamp']['microseconds'] / 1000000.0 @@ -80,9 +102,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCa= se): self.vm_b_events =3D [] =20 def test_postcopy(self): - discard_size =3D 0x40000000 granularity =3D 512 - chunk =3D 4096 =20 result =3D self.vm_a.qmp('block-dirty-bitmap-add', node=3D'drive0', name=3D'bitmap', granularity=3Dgranularity) @@ -92,14 +112,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestC= ase): node=3D'drive0', name=3D'bitmap') empty_sha256 =3D result['return']['sha256'] =20 - s =3D 0 - while s < discard_size: - self.vm_a.hmp_qemu_io('drive0', 'discard %d %d' % (s, chunk)) - s +=3D 0x10000 - s =3D 0x8000 - while s < discard_size: - self.vm_a.hmp_qemu_io('drive0', 'discard %d %d' % (s, chunk)) - s +=3D 0x10000 + apply_discards(self.vm_a, discards1 + discards2) =20 result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', node=3D'drive0', name=3D'bitmap') @@ -111,10 +124,8 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): result =3D self.vm_a.qmp('block-dirty-bitmap-clear', node=3D'drive= 0', name=3D'bitmap') self.assert_qmp(result, 'return', {}) - s =3D 0 - while s < discard_size: - self.vm_a.hmp_qemu_io('drive0', 'discard %d %d' % (s, chunk)) - s +=3D 0x10000 + + apply_discards(self.vm_a, discards1) =20 caps =3D [{'capability': 'dirty-bitmaps', 'state': True}, {'capability': 'events', 'state': True}] @@ -134,10 +145,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): event_resume =3D self.vm_b.event_wait('RESUME') self.vm_b_events.append(event_resume) =20 - s =3D 0x8000 - while s < discard_size: - self.vm_b.hmp_qemu_io('drive0', 'discard %d %d' % (s, chunk)) - s +=3D 0x10000 + apply_discards(self.vm_b, discards2) =20 match =3D {'data': {'status': 'completed'}} event_complete =3D self.vm_b.event_wait('MIGRATION', match=3Dmatch) --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" The test wants to force a bitmap postcopy. Still, the resulting postcopy period is very small. Let's increase it by adding more bitmaps to migrate. Also, test disabled bitmaps migration. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Tested-by: Eric Blake --- tests/qemu-iotests/199 | 58 ++++++++++++++++++++++++++++-------------- 1 file changed, 39 insertions(+), 19 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index da4dae01fb..d8532e49da 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -103,29 +103,45 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTes= tCase): =20 def test_postcopy(self): granularity =3D 512 + nb_bitmaps =3D 15 =20 - result =3D self.vm_a.qmp('block-dirty-bitmap-add', node=3D'drive0', - name=3D'bitmap', granularity=3Dgranularity) - self.assert_qmp(result, 'return', {}) + for i in range(nb_bitmaps): + result =3D self.vm_a.qmp('block-dirty-bitmap-add', node=3D'dri= ve0', + name=3D'bitmap{}'.format(i), + granularity=3Dgranularity) + self.assert_qmp(result, 'return', {}) =20 result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', - node=3D'drive0', name=3D'bitmap') + node=3D'drive0', name=3D'bitmap0') empty_sha256 =3D result['return']['sha256'] =20 - apply_discards(self.vm_a, discards1 + discards2) + apply_discards(self.vm_a, discards1) =20 result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', - node=3D'drive0', name=3D'bitmap') - sha256 =3D result['return']['sha256'] + node=3D'drive0', name=3D'bitmap0') + discards1_sha256 =3D result['return']['sha256'] =20 # Check, that updating the bitmap by discards works - assert sha256 !=3D empty_sha256 + assert discards1_sha256 !=3D empty_sha256 =20 - result =3D self.vm_a.qmp('block-dirty-bitmap-clear', node=3D'drive= 0', - name=3D'bitmap') - self.assert_qmp(result, 'return', {}) + # We want to calculate resulting sha256. Do it in bitmap0, so, dis= able + # other bitmaps + for i in range(1, nb_bitmaps): + result =3D self.vm_a.qmp('block-dirty-bitmap-disable', node=3D= 'drive0', + name=3D'bitmap{}'.format(i)) + self.assert_qmp(result, 'return', {}) =20 - apply_discards(self.vm_a, discards1) + apply_discards(self.vm_a, discards2) + + result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', + node=3D'drive0', name=3D'bitmap0') + all_discards_sha256 =3D result['return']['sha256'] + + # Now, enable some bitmaps, to be updated during migration + for i in range(2, nb_bitmaps, 2): + result =3D self.vm_a.qmp('block-dirty-bitmap-enable', node=3D'= drive0', + name=3D'bitmap{}'.format(i)) + self.assert_qmp(result, 'return', {}) =20 caps =3D [{'capability': 'dirty-bitmaps', 'state': True}, {'capability': 'events', 'state': True}] @@ -145,6 +161,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestC= ase): event_resume =3D self.vm_b.event_wait('RESUME') self.vm_b_events.append(event_resume) =20 + # enabled bitmaps should be updated apply_discards(self.vm_b, discards2) =20 match =3D {'data': {'status': 'completed'}} @@ -158,7 +175,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestC= ase): downtime =3D event_dist(event_stop, event_resume) postcopy_time =3D event_dist(event_resume, event_complete) =20 - # TODO: assert downtime * 10 < postcopy_time + assert downtime * 10 < postcopy_time if debug: print('downtime:', downtime) print('postcopy_time:', postcopy_time) @@ -166,12 +183,15 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTes= tCase): # Assert that bitmap migration is finished (check that successor b= itmap # is removed) result =3D self.vm_b.qmp('query-block') - assert len(result['return'][0]['dirty-bitmaps']) =3D=3D 1 - - # Check content of migrated (and updated by new writes) bitmap - result =3D self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256', - node=3D'drive0', name=3D'bitmap') - self.assert_qmp(result, 'return/sha256', sha256) + assert len(result['return'][0]['dirty-bitmaps']) =3D=3D nb_bitmaps + + # Check content of migrated bitmaps. Still, don't waste time check= ing + # every bitmap + for i in range(0, nb_bitmaps, 5): + result =3D self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256', + node=3D'drive0', name=3D'bitmap{}'.form= at(i)) + sha256 =3D discards1_sha256 if i % 2 else all_discards_sha256 + self.assert_qmp(result, 'return/sha256', sha256) =20 =20 if __name__ =3D=3D '__main__': --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595580433; cv=pass; d=zohomail.com; s=zohoarc; b=c0QO8bfztecl/EKRi+fcDaqWcfyE2wL8bSebnqOYGZwIswrc7U8Q5aucO2yGiepiPNBmLC0veUB7nAvtQ8gObOpyVMXdwmWZtV0lXDSqsPdBGha1Irjuj9alaPD39H02oM7bQmm0AovxyTLqAp4QtN1Iv79HvylwqCqcGY83uWA= ARC-Message-Signature: i=2; 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charset="utf-8" No reason to use _locked version of bdrv_enable_dirty_bitmap, as we don't lock this mutex before. Moreover, the adjacent bdrv_dirty_bitmap_enable_successor do lock the mutex. Fixes: 58f72b965e9e1q Cc: qemu-stable@nongnu.org # v3.0 Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Reviewed-by: Eric Blake --- migration/block-dirty-bitmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index b0dbf9eeed..0739f1259e 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -566,7 +566,7 @@ void dirty_bitmap_mig_before_vm_start(void) DirtyBitmapLoadBitmapState *b =3D item->data; =20 if (b->migrated) { - bdrv_enable_dirty_bitmap_locked(b->bitmap); + bdrv_enable_dirty_bitmap(b->bitmap); } else { bdrv_dirty_bitmap_enable_successor(b->bitmap); } --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); 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charset="utf-8" Rename types to be symmetrical for load/save part and shorter. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Reviewed-by: Eric Blake --- migration/block-dirty-bitmap.c | 70 ++++++++++++++++++---------------- 1 file changed, 37 insertions(+), 33 deletions(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 0739f1259e..1d57bff4f6 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -100,23 +100,25 @@ /* 0x04 was "AUTOLOAD" flags on elder versions, no it is ignored */ #define DIRTY_BITMAP_MIG_START_FLAG_RESERVED_MASK 0xf8 =20 -typedef struct DirtyBitmapMigBitmapState { +/* State of one bitmap during save process */ +typedef struct SaveBitmapState { /* Written during setup phase. */ BlockDriverState *bs; const char *node_name; BdrvDirtyBitmap *bitmap; uint64_t total_sectors; uint64_t sectors_per_chunk; - QSIMPLEQ_ENTRY(DirtyBitmapMigBitmapState) entry; + QSIMPLEQ_ENTRY(SaveBitmapState) entry; uint8_t flags; =20 /* For bulk phase. */ bool bulk_completed; uint64_t cur_sector; -} DirtyBitmapMigBitmapState; +} SaveBitmapState; =20 -typedef struct DirtyBitmapMigState { - QSIMPLEQ_HEAD(, DirtyBitmapMigBitmapState) dbms_list; +/* State of the dirty bitmap migration (DBM) during save process */ +typedef struct DBMSaveState { + QSIMPLEQ_HEAD(, SaveBitmapState) dbms_list; =20 bool bulk_completed; bool no_bitmaps; @@ -124,23 +126,25 @@ typedef struct DirtyBitmapMigState { /* for send_bitmap_bits() */ BlockDriverState *prev_bs; BdrvDirtyBitmap *prev_bitmap; -} DirtyBitmapMigState; +} DBMSaveState; =20 -typedef struct DirtyBitmapLoadState { +/* State of the dirty bitmap migration (DBM) during load process */ +typedef struct DBMLoadState { uint32_t flags; char node_name[256]; char bitmap_name[256]; BlockDriverState *bs; BdrvDirtyBitmap *bitmap; -} DirtyBitmapLoadState; +} DBMLoadState; =20 -static DirtyBitmapMigState dirty_bitmap_mig_state; +static DBMSaveState dirty_bitmap_mig_state; =20 -typedef struct DirtyBitmapLoadBitmapState { +/* State of one bitmap during load process */ +typedef struct LoadBitmapState { BlockDriverState *bs; BdrvDirtyBitmap *bitmap; bool migrated; -} DirtyBitmapLoadBitmapState; +} LoadBitmapState; static GSList *enabled_bitmaps; QemuMutex finish_lock; =20 @@ -170,7 +174,7 @@ static void qemu_put_bitmap_flags(QEMUFile *f, uint32_t= flags) qemu_put_byte(f, flags); } =20 -static void send_bitmap_header(QEMUFile *f, DirtyBitmapMigBitmapState *dbm= s, +static void send_bitmap_header(QEMUFile *f, SaveBitmapState *dbms, uint32_t additional_flags) { BlockDriverState *bs =3D dbms->bs; @@ -199,19 +203,19 @@ static void send_bitmap_header(QEMUFile *f, DirtyBitm= apMigBitmapState *dbms, } } =20 -static void send_bitmap_start(QEMUFile *f, DirtyBitmapMigBitmapState *dbms) +static void send_bitmap_start(QEMUFile *f, SaveBitmapState *dbms) { send_bitmap_header(f, dbms, DIRTY_BITMAP_MIG_FLAG_START); qemu_put_be32(f, bdrv_dirty_bitmap_granularity(dbms->bitmap)); qemu_put_byte(f, dbms->flags); } =20 -static void send_bitmap_complete(QEMUFile *f, DirtyBitmapMigBitmapState *d= bms) +static void send_bitmap_complete(QEMUFile *f, SaveBitmapState *dbms) { send_bitmap_header(f, dbms, DIRTY_BITMAP_MIG_FLAG_COMPLETE); } =20 -static void send_bitmap_bits(QEMUFile *f, DirtyBitmapMigBitmapState *dbms, +static void send_bitmap_bits(QEMUFile *f, SaveBitmapState *dbms, uint64_t start_sector, uint32_t nr_sectors) { /* align for buffer_is_zero() */ @@ -257,7 +261,7 @@ static void send_bitmap_bits(QEMUFile *f, DirtyBitmapMi= gBitmapState *dbms, /* Called with iothread lock taken. */ static void dirty_bitmap_mig_cleanup(void) { - DirtyBitmapMigBitmapState *dbms; + SaveBitmapState *dbms; =20 while ((dbms =3D QSIMPLEQ_FIRST(&dirty_bitmap_mig_state.dbms_list)) != =3D NULL) { QSIMPLEQ_REMOVE_HEAD(&dirty_bitmap_mig_state.dbms_list, entry); @@ -271,7 +275,7 @@ static void dirty_bitmap_mig_cleanup(void) static int add_bitmaps_to_list(BlockDriverState *bs, const char *bs_name) { BdrvDirtyBitmap *bitmap; - DirtyBitmapMigBitmapState *dbms; + SaveBitmapState *dbms; Error *local_err =3D NULL; =20 FOR_EACH_DIRTY_BITMAP(bs, bitmap) { @@ -309,7 +313,7 @@ static int add_bitmaps_to_list(BlockDriverState *bs, co= nst char *bs_name) bdrv_ref(bs); bdrv_dirty_bitmap_set_busy(bitmap, true); =20 - dbms =3D g_new0(DirtyBitmapMigBitmapState, 1); + dbms =3D g_new0(SaveBitmapState, 1); dbms->bs =3D bs; dbms->node_name =3D bs_name; dbms->bitmap =3D bitmap; @@ -334,7 +338,7 @@ static int add_bitmaps_to_list(BlockDriverState *bs, co= nst char *bs_name) static int init_dirty_bitmap_migration(void) { BlockDriverState *bs; - DirtyBitmapMigBitmapState *dbms; + SaveBitmapState *dbms; GHashTable *handled_by_blk =3D g_hash_table_new(NULL, NULL); BlockBackend *blk; =20 @@ -408,7 +412,7 @@ fail: } =20 /* Called with no lock taken. */ -static void bulk_phase_send_chunk(QEMUFile *f, DirtyBitmapMigBitmapState *= dbms) +static void bulk_phase_send_chunk(QEMUFile *f, SaveBitmapState *dbms) { uint32_t nr_sectors =3D MIN(dbms->total_sectors - dbms->cur_sector, dbms->sectors_per_chunk); @@ -424,7 +428,7 @@ static void bulk_phase_send_chunk(QEMUFile *f, DirtyBit= mapMigBitmapState *dbms) /* Called with no lock taken. */ static void bulk_phase(QEMUFile *f, bool limit) { - DirtyBitmapMigBitmapState *dbms; + SaveBitmapState *dbms; =20 QSIMPLEQ_FOREACH(dbms, &dirty_bitmap_mig_state.dbms_list, entry) { while (!dbms->bulk_completed) { @@ -461,7 +465,7 @@ static int dirty_bitmap_save_iterate(QEMUFile *f, void = *opaque) =20 static int dirty_bitmap_save_complete(QEMUFile *f, void *opaque) { - DirtyBitmapMigBitmapState *dbms; + SaveBitmapState *dbms; trace_dirty_bitmap_save_complete_enter(); =20 if (!dirty_bitmap_mig_state.bulk_completed) { @@ -486,7 +490,7 @@ static void dirty_bitmap_save_pending(QEMUFile *f, void= *opaque, uint64_t *res_compatible, uint64_t *res_postcopy_only) { - DirtyBitmapMigBitmapState *dbms; + SaveBitmapState *dbms; uint64_t pending =3D 0; =20 qemu_mutex_lock_iothread(); @@ -507,7 +511,7 @@ static void dirty_bitmap_save_pending(QEMUFile *f, void= *opaque, } =20 /* First occurrence of this bitmap. It should be created if doesn't exist = */ -static int dirty_bitmap_load_start(QEMUFile *f, DirtyBitmapLoadState *s) +static int dirty_bitmap_load_start(QEMUFile *f, DBMLoadState *s) { Error *local_err =3D NULL; uint32_t granularity =3D qemu_get_be32(f); @@ -538,7 +542,7 @@ static int dirty_bitmap_load_start(QEMUFile *f, DirtyBi= tmapLoadState *s) =20 bdrv_disable_dirty_bitmap(s->bitmap); if (flags & DIRTY_BITMAP_MIG_START_FLAG_ENABLED) { - DirtyBitmapLoadBitmapState *b; + LoadBitmapState *b; =20 bdrv_dirty_bitmap_create_successor(s->bitmap, &local_err); if (local_err) { @@ -546,7 +550,7 @@ static int dirty_bitmap_load_start(QEMUFile *f, DirtyBi= tmapLoadState *s) return -EINVAL; } =20 - b =3D g_new(DirtyBitmapLoadBitmapState, 1); + b =3D g_new(LoadBitmapState, 1); b->bs =3D s->bs; b->bitmap =3D s->bitmap; b->migrated =3D false; @@ -563,7 +567,7 @@ void dirty_bitmap_mig_before_vm_start(void) qemu_mutex_lock(&finish_lock); =20 for (item =3D enabled_bitmaps; item; item =3D g_slist_next(item)) { - DirtyBitmapLoadBitmapState *b =3D item->data; + LoadBitmapState *b =3D item->data; =20 if (b->migrated) { bdrv_enable_dirty_bitmap(b->bitmap); @@ -580,7 +584,7 @@ void dirty_bitmap_mig_before_vm_start(void) qemu_mutex_unlock(&finish_lock); } =20 -static void dirty_bitmap_load_complete(QEMUFile *f, DirtyBitmapLoadState *= s) +static void dirty_bitmap_load_complete(QEMUFile *f, DBMLoadState *s) { GSList *item; trace_dirty_bitmap_load_complete(); @@ -589,7 +593,7 @@ static void dirty_bitmap_load_complete(QEMUFile *f, Dir= tyBitmapLoadState *s) qemu_mutex_lock(&finish_lock); =20 for (item =3D enabled_bitmaps; item; item =3D g_slist_next(item)) { - DirtyBitmapLoadBitmapState *b =3D item->data; + LoadBitmapState *b =3D item->data; =20 if (b->bitmap =3D=3D s->bitmap) { b->migrated =3D true; @@ -621,7 +625,7 @@ static void dirty_bitmap_load_complete(QEMUFile *f, Dir= tyBitmapLoadState *s) qemu_mutex_unlock(&finish_lock); } =20 -static int dirty_bitmap_load_bits(QEMUFile *f, DirtyBitmapLoadState *s) +static int dirty_bitmap_load_bits(QEMUFile *f, DBMLoadState *s) { uint64_t first_byte =3D qemu_get_be64(f) << BDRV_SECTOR_BITS; uint64_t nr_bytes =3D (uint64_t)qemu_get_be32(f) << BDRV_SECTOR_BITS; @@ -666,7 +670,7 @@ static int dirty_bitmap_load_bits(QEMUFile *f, DirtyBit= mapLoadState *s) return 0; } =20 -static int dirty_bitmap_load_header(QEMUFile *f, DirtyBitmapLoadState *s) +static int dirty_bitmap_load_header(QEMUFile *f, DBMLoadState *s) { Error *local_err =3D NULL; bool nothing; @@ -715,7 +719,7 @@ static int dirty_bitmap_load_header(QEMUFile *f, DirtyB= itmapLoadState *s) =20 static int dirty_bitmap_load(QEMUFile *f, void *opaque, int version_id) { - static DirtyBitmapLoadState s; + static DBMLoadState s; int ret =3D 0; =20 trace_dirty_bitmap_load_enter(); @@ -753,7 +757,7 @@ static int dirty_bitmap_load(QEMUFile *f, void *opaque,= int version_id) =20 static int dirty_bitmap_save_setup(QEMUFile *f, void *opaque) { - DirtyBitmapMigBitmapState *dbms =3D NULL; + SaveBitmapState *dbms =3D NULL; if (init_dirty_bitmap_migration() < 0) { return -1; } --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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charset="utf-8" Rename dirty_bitmap_mig_cleanup to dirty_bitmap_do_save_cleanup, to stress that it is on save part. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Reviewed-by: Eric Blake --- migration/block-dirty-bitmap.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 1d57bff4f6..01a536d7d3 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -259,7 +259,7 @@ static void send_bitmap_bits(QEMUFile *f, SaveBitmapSta= te *dbms, } =20 /* Called with iothread lock taken. */ -static void dirty_bitmap_mig_cleanup(void) +static void dirty_bitmap_do_save_cleanup(void) { SaveBitmapState *dbms; =20 @@ -406,7 +406,7 @@ static int init_dirty_bitmap_migration(void) =20 fail: g_hash_table_destroy(handled_by_blk); - dirty_bitmap_mig_cleanup(); + dirty_bitmap_do_save_cleanup(); =20 return -1; } @@ -445,7 +445,7 @@ static void bulk_phase(QEMUFile *f, bool limit) /* for SaveVMHandlers */ static void dirty_bitmap_save_cleanup(void *opaque) { - dirty_bitmap_mig_cleanup(); + dirty_bitmap_do_save_cleanup(); } =20 static int dirty_bitmap_save_iterate(QEMUFile *f, void *opaque) @@ -480,7 +480,7 @@ static int dirty_bitmap_save_complete(QEMUFile *f, void= *opaque) =20 trace_dirty_bitmap_save_complete_finish(); =20 - dirty_bitmap_mig_cleanup(); + dirty_bitmap_do_save_cleanup(); return 0; } =20 --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595580587; cv=pass; d=zohomail.com; s=zohoarc; b=etB+2r/ECGDBwNmFldhd3fWWbkohuKblZJDmOA79wcR+DkPcwKqSUd8f1IR1L+t+2sxSLoPZTZ5k5XEEIKZmiX1RphbOfVlWy7IqXrzqdRoQpcjUKnJgTbbAH/8hUrEiuyB3DOKA0iYrZUIGbAKXKcGwh+g3lA5eil5HCL7goPU= ARC-Message-Signature: i=2; a=rsa-sha256; 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charset="utf-8" No reasons to keep two public init functions. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Reviewed-by: Dr. David Alan Gilbert --- migration/migration.h | 1 - migration/block-dirty-bitmap.c | 6 +----- migration/migration.c | 2 -- 3 files changed, 1 insertion(+), 8 deletions(-) diff --git a/migration/migration.h b/migration/migration.h index f617960522..ab20c756f5 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -335,7 +335,6 @@ void migrate_send_rp_recv_bitmap(MigrationIncomingState= *mis, void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t valu= e); =20 void dirty_bitmap_mig_before_vm_start(void); -void init_dirty_bitmap_incoming_migration(void); void migrate_add_address(SocketAddress *address); =20 int foreach_not_ignored_block(RAMBlockIterFunc func, void *opaque); diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 01a536d7d3..4b67e4f4fb 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -148,11 +148,6 @@ typedef struct LoadBitmapState { static GSList *enabled_bitmaps; QemuMutex finish_lock; =20 -void init_dirty_bitmap_incoming_migration(void) -{ - qemu_mutex_init(&finish_lock); -} - static uint32_t qemu_get_bitmap_flags(QEMUFile *f) { uint8_t flags =3D qemu_get_byte(f); @@ -801,6 +796,7 @@ static SaveVMHandlers savevm_dirty_bitmap_handlers =3D { void dirty_bitmap_mig_init(void) { QSIMPLEQ_INIT(&dirty_bitmap_mig_state.dbms_list); + qemu_mutex_init(&finish_lock); =20 register_savevm_live("dirty-bitmap", 0, 1, &savevm_dirty_bitmap_handlers, diff --git a/migration/migration.c b/migration/migration.c index 2ed9923227..1c61428988 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -165,8 +165,6 @@ void migration_object_init(void) qemu_sem_init(¤t_incoming->postcopy_pause_sem_dst, 0); qemu_sem_init(¤t_incoming->postcopy_pause_sem_fault, 0); =20 - init_dirty_bitmap_incoming_migration(); - if (!migration_object_check(current_migration, &err)) { error_report_err(err); exit(1); --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.8.95; envelope-from=vsementsov@virtuozzo.com; helo=EUR04-VI1-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/24 04:43:59 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -37 X-Spam_score: -3.8 X-Spam_bar: --- X-Spam_report: (-3.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, quintela@redhat.com, qemu-devel@nongnu.org, dgilbert@redhat.com, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" Move all state variables into one global struct. Reduce global variable usage, utilizing opaque pointer where possible. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich --- migration/block-dirty-bitmap.c | 179 ++++++++++++++++++--------------- 1 file changed, 99 insertions(+), 80 deletions(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 4b67e4f4fb..9b39e7aa2b 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -128,6 +128,12 @@ typedef struct DBMSaveState { BdrvDirtyBitmap *prev_bitmap; } DBMSaveState; =20 +typedef struct LoadBitmapState { + BlockDriverState *bs; + BdrvDirtyBitmap *bitmap; + bool migrated; +} LoadBitmapState; + /* State of the dirty bitmap migration (DBM) during load process */ typedef struct DBMLoadState { uint32_t flags; @@ -135,18 +141,17 @@ typedef struct DBMLoadState { char bitmap_name[256]; BlockDriverState *bs; BdrvDirtyBitmap *bitmap; + + GSList *enabled_bitmaps; + QemuMutex finish_lock; } DBMLoadState; =20 -static DBMSaveState dirty_bitmap_mig_state; +typedef struct DBMState { + DBMSaveState save; + DBMLoadState load; +} DBMState; =20 -/* State of one bitmap during load process */ -typedef struct LoadBitmapState { - BlockDriverState *bs; - BdrvDirtyBitmap *bitmap; - bool migrated; -} LoadBitmapState; -static GSList *enabled_bitmaps; -QemuMutex finish_lock; +static DBMState dbm_state; =20 static uint32_t qemu_get_bitmap_flags(QEMUFile *f) { @@ -169,21 +174,21 @@ static void qemu_put_bitmap_flags(QEMUFile *f, uint32= _t flags) qemu_put_byte(f, flags); } =20 -static void send_bitmap_header(QEMUFile *f, SaveBitmapState *dbms, - uint32_t additional_flags) +static void send_bitmap_header(QEMUFile *f, DBMSaveState *s, + SaveBitmapState *dbms, uint32_t additional_= flags) { BlockDriverState *bs =3D dbms->bs; BdrvDirtyBitmap *bitmap =3D dbms->bitmap; uint32_t flags =3D additional_flags; trace_send_bitmap_header_enter(); =20 - if (bs !=3D dirty_bitmap_mig_state.prev_bs) { - dirty_bitmap_mig_state.prev_bs =3D bs; + if (bs !=3D s->prev_bs) { + s->prev_bs =3D bs; flags |=3D DIRTY_BITMAP_MIG_FLAG_DEVICE_NAME; } =20 - if (bitmap !=3D dirty_bitmap_mig_state.prev_bitmap) { - dirty_bitmap_mig_state.prev_bitmap =3D bitmap; + if (bitmap !=3D s->prev_bitmap) { + s->prev_bitmap =3D bitmap; flags |=3D DIRTY_BITMAP_MIG_FLAG_BITMAP_NAME; } =20 @@ -198,19 +203,22 @@ static void send_bitmap_header(QEMUFile *f, SaveBitma= pState *dbms, } } =20 -static void send_bitmap_start(QEMUFile *f, SaveBitmapState *dbms) +static void send_bitmap_start(QEMUFile *f, DBMSaveState *s, + SaveBitmapState *dbms) { - send_bitmap_header(f, dbms, DIRTY_BITMAP_MIG_FLAG_START); + send_bitmap_header(f, s, dbms, DIRTY_BITMAP_MIG_FLAG_START); qemu_put_be32(f, bdrv_dirty_bitmap_granularity(dbms->bitmap)); qemu_put_byte(f, dbms->flags); } =20 -static void send_bitmap_complete(QEMUFile *f, SaveBitmapState *dbms) +static void send_bitmap_complete(QEMUFile *f, DBMSaveState *s, + SaveBitmapState *dbms) { - send_bitmap_header(f, dbms, DIRTY_BITMAP_MIG_FLAG_COMPLETE); + send_bitmap_header(f, s, dbms, DIRTY_BITMAP_MIG_FLAG_COMPLETE); } =20 -static void send_bitmap_bits(QEMUFile *f, SaveBitmapState *dbms, +static void send_bitmap_bits(QEMUFile *f, DBMSaveState *s, + SaveBitmapState *dbms, uint64_t start_sector, uint32_t nr_sectors) { /* align for buffer_is_zero() */ @@ -235,7 +243,7 @@ static void send_bitmap_bits(QEMUFile *f, SaveBitmapSta= te *dbms, =20 trace_send_bitmap_bits(flags, start_sector, nr_sectors, buf_size); =20 - send_bitmap_header(f, dbms, flags); + send_bitmap_header(f, s, dbms, flags); =20 qemu_put_be64(f, start_sector); qemu_put_be32(f, nr_sectors); @@ -254,12 +262,12 @@ static void send_bitmap_bits(QEMUFile *f, SaveBitmapS= tate *dbms, } =20 /* Called with iothread lock taken. */ -static void dirty_bitmap_do_save_cleanup(void) +static void dirty_bitmap_do_save_cleanup(DBMSaveState *s) { SaveBitmapState *dbms; =20 - while ((dbms =3D QSIMPLEQ_FIRST(&dirty_bitmap_mig_state.dbms_list)) != =3D NULL) { - QSIMPLEQ_REMOVE_HEAD(&dirty_bitmap_mig_state.dbms_list, entry); + while ((dbms =3D QSIMPLEQ_FIRST(&s->dbms_list)) !=3D NULL) { + QSIMPLEQ_REMOVE_HEAD(&s->dbms_list, entry); bdrv_dirty_bitmap_set_busy(dbms->bitmap, false); bdrv_unref(dbms->bs); g_free(dbms); @@ -267,7 +275,8 @@ static void dirty_bitmap_do_save_cleanup(void) } =20 /* Called with iothread lock taken. */ -static int add_bitmaps_to_list(BlockDriverState *bs, const char *bs_name) +static int add_bitmaps_to_list(DBMSaveState *s, BlockDriverState *bs, + const char *bs_name) { BdrvDirtyBitmap *bitmap; SaveBitmapState *dbms; @@ -322,25 +331,24 @@ static int add_bitmaps_to_list(BlockDriverState *bs, = const char *bs_name) dbms->flags |=3D DIRTY_BITMAP_MIG_START_FLAG_PERSISTENT; } =20 - QSIMPLEQ_INSERT_TAIL(&dirty_bitmap_mig_state.dbms_list, - dbms, entry); + QSIMPLEQ_INSERT_TAIL(&s->dbms_list, dbms, entry); } =20 return 0; } =20 /* Called with iothread lock taken. */ -static int init_dirty_bitmap_migration(void) +static int init_dirty_bitmap_migration(DBMSaveState *s) { BlockDriverState *bs; SaveBitmapState *dbms; GHashTable *handled_by_blk =3D g_hash_table_new(NULL, NULL); BlockBackend *blk; =20 - dirty_bitmap_mig_state.bulk_completed =3D false; - dirty_bitmap_mig_state.prev_bs =3D NULL; - dirty_bitmap_mig_state.prev_bitmap =3D NULL; - dirty_bitmap_mig_state.no_bitmaps =3D false; + s->bulk_completed =3D false; + s->prev_bs =3D NULL; + s->prev_bitmap =3D NULL; + s->no_bitmaps =3D false; =20 /* * Use blockdevice name for direct (or filtered) children of named blo= ck @@ -369,7 +377,7 @@ static int init_dirty_bitmap_migration(void) } =20 if (bs && bs->drv && !bs->drv->is_filter) { - if (add_bitmaps_to_list(bs, name)) { + if (add_bitmaps_to_list(s, bs, name)) { goto fail; } g_hash_table_add(handled_by_blk, bs); @@ -381,18 +389,18 @@ static int init_dirty_bitmap_migration(void) continue; } =20 - if (add_bitmaps_to_list(bs, bdrv_get_node_name(bs))) { + if (add_bitmaps_to_list(s, bs, bdrv_get_node_name(bs))) { goto fail; } } =20 /* unset migration flags here, to not roll back it */ - QSIMPLEQ_FOREACH(dbms, &dirty_bitmap_mig_state.dbms_list, entry) { + QSIMPLEQ_FOREACH(dbms, &s->dbms_list, entry) { bdrv_dirty_bitmap_skip_store(dbms->bitmap, true); } =20 - if (QSIMPLEQ_EMPTY(&dirty_bitmap_mig_state.dbms_list)) { - dirty_bitmap_mig_state.no_bitmaps =3D true; + if (QSIMPLEQ_EMPTY(&s->dbms_list)) { + s->no_bitmaps =3D true; } =20 g_hash_table_destroy(handled_by_blk); @@ -401,18 +409,19 @@ static int init_dirty_bitmap_migration(void) =20 fail: g_hash_table_destroy(handled_by_blk); - dirty_bitmap_do_save_cleanup(); + dirty_bitmap_do_save_cleanup(s); =20 return -1; } =20 /* Called with no lock taken. */ -static void bulk_phase_send_chunk(QEMUFile *f, SaveBitmapState *dbms) +static void bulk_phase_send_chunk(QEMUFile *f, DBMSaveState *s, + SaveBitmapState *dbms) { uint32_t nr_sectors =3D MIN(dbms->total_sectors - dbms->cur_sector, dbms->sectors_per_chunk); =20 - send_bitmap_bits(f, dbms, dbms->cur_sector, nr_sectors); + send_bitmap_bits(f, s, dbms, dbms->cur_sector, nr_sectors); =20 dbms->cur_sector +=3D nr_sectors; if (dbms->cur_sector >=3D dbms->total_sectors) { @@ -421,61 +430,66 @@ static void bulk_phase_send_chunk(QEMUFile *f, SaveBi= tmapState *dbms) } =20 /* Called with no lock taken. */ -static void bulk_phase(QEMUFile *f, bool limit) +static void bulk_phase(QEMUFile *f, DBMSaveState *s, bool limit) { SaveBitmapState *dbms; =20 - QSIMPLEQ_FOREACH(dbms, &dirty_bitmap_mig_state.dbms_list, entry) { + QSIMPLEQ_FOREACH(dbms, &s->dbms_list, entry) { while (!dbms->bulk_completed) { - bulk_phase_send_chunk(f, dbms); + bulk_phase_send_chunk(f, s, dbms); if (limit && qemu_file_rate_limit(f)) { return; } } } =20 - dirty_bitmap_mig_state.bulk_completed =3D true; + s->bulk_completed =3D true; } =20 /* for SaveVMHandlers */ static void dirty_bitmap_save_cleanup(void *opaque) { - dirty_bitmap_do_save_cleanup(); + DBMSaveState *s =3D &((DBMState *)opaque)->save; + + dirty_bitmap_do_save_cleanup(s); } =20 static int dirty_bitmap_save_iterate(QEMUFile *f, void *opaque) { + DBMSaveState *s =3D &((DBMState *)opaque)->save; + trace_dirty_bitmap_save_iterate(migration_in_postcopy()); =20 - if (migration_in_postcopy() && !dirty_bitmap_mig_state.bulk_completed)= { - bulk_phase(f, true); + if (migration_in_postcopy() && !s->bulk_completed) { + bulk_phase(f, s, true); } =20 qemu_put_bitmap_flags(f, DIRTY_BITMAP_MIG_FLAG_EOS); =20 - return dirty_bitmap_mig_state.bulk_completed; + return s->bulk_completed; } =20 /* Called with iothread lock taken. */ =20 static int dirty_bitmap_save_complete(QEMUFile *f, void *opaque) { + DBMSaveState *s =3D &((DBMState *)opaque)->save; SaveBitmapState *dbms; trace_dirty_bitmap_save_complete_enter(); =20 - if (!dirty_bitmap_mig_state.bulk_completed) { - bulk_phase(f, false); + if (!s->bulk_completed) { + bulk_phase(f, s, false); } =20 - QSIMPLEQ_FOREACH(dbms, &dirty_bitmap_mig_state.dbms_list, entry) { - send_bitmap_complete(f, dbms); + QSIMPLEQ_FOREACH(dbms, &s->dbms_list, entry) { + send_bitmap_complete(f, s, dbms); } =20 qemu_put_bitmap_flags(f, DIRTY_BITMAP_MIG_FLAG_EOS); =20 trace_dirty_bitmap_save_complete_finish(); =20 - dirty_bitmap_do_save_cleanup(); + dirty_bitmap_save_cleanup(opaque); return 0; } =20 @@ -485,12 +499,13 @@ static void dirty_bitmap_save_pending(QEMUFile *f, vo= id *opaque, uint64_t *res_compatible, uint64_t *res_postcopy_only) { + DBMSaveState *s =3D &((DBMState *)opaque)->save; SaveBitmapState *dbms; uint64_t pending =3D 0; =20 qemu_mutex_lock_iothread(); =20 - QSIMPLEQ_FOREACH(dbms, &dirty_bitmap_mig_state.dbms_list, entry) { + QSIMPLEQ_FOREACH(dbms, &s->dbms_list, entry) { uint64_t gran =3D bdrv_dirty_bitmap_granularity(dbms->bitmap); uint64_t sectors =3D dbms->bulk_completed ? 0 : dbms->total_sectors - dbms->cur_sector; @@ -549,7 +564,7 @@ static int dirty_bitmap_load_start(QEMUFile *f, DBMLoad= State *s) b->bs =3D s->bs; b->bitmap =3D s->bitmap; b->migrated =3D false; - enabled_bitmaps =3D g_slist_prepend(enabled_bitmaps, b); + s->enabled_bitmaps =3D g_slist_prepend(s->enabled_bitmaps, b); } =20 return 0; @@ -557,11 +572,12 @@ static int dirty_bitmap_load_start(QEMUFile *f, DBMLo= adState *s) =20 void dirty_bitmap_mig_before_vm_start(void) { + DBMLoadState *s =3D &dbm_state.load; GSList *item; =20 - qemu_mutex_lock(&finish_lock); + qemu_mutex_lock(&s->finish_lock); =20 - for (item =3D enabled_bitmaps; item; item =3D g_slist_next(item)) { + for (item =3D s->enabled_bitmaps; item; item =3D g_slist_next(item)) { LoadBitmapState *b =3D item->data; =20 if (b->migrated) { @@ -573,10 +589,10 @@ void dirty_bitmap_mig_before_vm_start(void) g_free(b); } =20 - g_slist_free(enabled_bitmaps); - enabled_bitmaps =3D NULL; + g_slist_free(s->enabled_bitmaps); + s->enabled_bitmaps =3D NULL; =20 - qemu_mutex_unlock(&finish_lock); + qemu_mutex_unlock(&s->finish_lock); } =20 static void dirty_bitmap_load_complete(QEMUFile *f, DBMLoadState *s) @@ -585,9 +601,9 @@ static void dirty_bitmap_load_complete(QEMUFile *f, DBM= LoadState *s) trace_dirty_bitmap_load_complete(); bdrv_dirty_bitmap_deserialize_finish(s->bitmap); =20 - qemu_mutex_lock(&finish_lock); + qemu_mutex_lock(&s->finish_lock); =20 - for (item =3D enabled_bitmaps; item; item =3D g_slist_next(item)) { + for (item =3D s->enabled_bitmaps; item; item =3D g_slist_next(item)) { LoadBitmapState *b =3D item->data; =20 if (b->bitmap =3D=3D s->bitmap) { @@ -598,7 +614,7 @@ static void dirty_bitmap_load_complete(QEMUFile *f, DBM= LoadState *s) =20 if (bdrv_dirty_bitmap_has_successor(s->bitmap)) { bdrv_dirty_bitmap_lock(s->bitmap); - if (enabled_bitmaps =3D=3D NULL) { + if (s->enabled_bitmaps =3D=3D NULL) { /* in postcopy */ bdrv_reclaim_dirty_bitmap_locked(s->bitmap, &error_abort); bdrv_enable_dirty_bitmap_locked(s->bitmap); @@ -617,7 +633,7 @@ static void dirty_bitmap_load_complete(QEMUFile *f, DBM= LoadState *s) bdrv_dirty_bitmap_unlock(s->bitmap); } =20 - qemu_mutex_unlock(&finish_lock); + qemu_mutex_unlock(&s->finish_lock); } =20 static int dirty_bitmap_load_bits(QEMUFile *f, DBMLoadState *s) @@ -714,7 +730,7 @@ static int dirty_bitmap_load_header(QEMUFile *f, DBMLoa= dState *s) =20 static int dirty_bitmap_load(QEMUFile *f, void *opaque, int version_id) { - static DBMLoadState s; + DBMLoadState *s =3D &((DBMState *)opaque)->load; int ret =3D 0; =20 trace_dirty_bitmap_load_enter(); @@ -724,17 +740,17 @@ static int dirty_bitmap_load(QEMUFile *f, void *opaqu= e, int version_id) } =20 do { - ret =3D dirty_bitmap_load_header(f, &s); + ret =3D dirty_bitmap_load_header(f, s); if (ret < 0) { return ret; } =20 - if (s.flags & DIRTY_BITMAP_MIG_FLAG_START) { - ret =3D dirty_bitmap_load_start(f, &s); - } else if (s.flags & DIRTY_BITMAP_MIG_FLAG_COMPLETE) { - dirty_bitmap_load_complete(f, &s); - } else if (s.flags & DIRTY_BITMAP_MIG_FLAG_BITS) { - ret =3D dirty_bitmap_load_bits(f, &s); + if (s->flags & DIRTY_BITMAP_MIG_FLAG_START) { + ret =3D dirty_bitmap_load_start(f, s); + } else if (s->flags & DIRTY_BITMAP_MIG_FLAG_COMPLETE) { + dirty_bitmap_load_complete(f, s); + } else if (s->flags & DIRTY_BITMAP_MIG_FLAG_BITS) { + ret =3D dirty_bitmap_load_bits(f, s); } =20 if (!ret) { @@ -744,7 +760,7 @@ static int dirty_bitmap_load(QEMUFile *f, void *opaque,= int version_id) if (ret) { return ret; } - } while (!(s.flags & DIRTY_BITMAP_MIG_FLAG_EOS)); + } while (!(s->flags & DIRTY_BITMAP_MIG_FLAG_EOS)); =20 trace_dirty_bitmap_load_success(); return 0; @@ -752,13 +768,14 @@ static int dirty_bitmap_load(QEMUFile *f, void *opaqu= e, int version_id) =20 static int dirty_bitmap_save_setup(QEMUFile *f, void *opaque) { + DBMSaveState *s =3D &((DBMState *)opaque)->save; SaveBitmapState *dbms =3D NULL; - if (init_dirty_bitmap_migration() < 0) { + if (init_dirty_bitmap_migration(s) < 0) { return -1; } =20 - QSIMPLEQ_FOREACH(dbms, &dirty_bitmap_mig_state.dbms_list, entry) { - send_bitmap_start(f, dbms); + QSIMPLEQ_FOREACH(dbms, &s->dbms_list, entry) { + send_bitmap_start(f, s, dbms); } qemu_put_bitmap_flags(f, DIRTY_BITMAP_MIG_FLAG_EOS); =20 @@ -767,7 +784,9 @@ static int dirty_bitmap_save_setup(QEMUFile *f, void *o= paque) =20 static bool dirty_bitmap_is_active(void *opaque) { - return migrate_dirty_bitmaps() && !dirty_bitmap_mig_state.no_bitmaps; + DBMSaveState *s =3D &((DBMState *)opaque)->save; + + return migrate_dirty_bitmaps() && !s->no_bitmaps; } =20 static bool dirty_bitmap_is_active_iterate(void *opaque) @@ -795,10 +814,10 @@ static SaveVMHandlers savevm_dirty_bitmap_handlers = =3D { =20 void dirty_bitmap_mig_init(void) { - QSIMPLEQ_INIT(&dirty_bitmap_mig_state.dbms_list); - qemu_mutex_init(&finish_lock); + QSIMPLEQ_INIT(&dbm_state.save.dbms_list); + qemu_mutex_init(&dbm_state.load.finish_lock); =20 register_savevm_live("dirty-bitmap", 0, 1, &savevm_dirty_bitmap_handlers, - &dirty_bitmap_mig_state); + &dbm_state); } --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595580797; cv=pass; d=zohomail.com; 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charset="utf-8" finish_lock is bad name, as lock used not only on process end. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich --- migration/block-dirty-bitmap.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 9b39e7aa2b..9194807b54 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -143,7 +143,7 @@ typedef struct DBMLoadState { BdrvDirtyBitmap *bitmap; =20 GSList *enabled_bitmaps; - QemuMutex finish_lock; + QemuMutex lock; /* protect enabled_bitmaps */ } DBMLoadState; =20 typedef struct DBMState { @@ -575,7 +575,7 @@ void dirty_bitmap_mig_before_vm_start(void) DBMLoadState *s =3D &dbm_state.load; GSList *item; =20 - qemu_mutex_lock(&s->finish_lock); + qemu_mutex_lock(&s->lock); =20 for (item =3D s->enabled_bitmaps; item; item =3D g_slist_next(item)) { LoadBitmapState *b =3D item->data; @@ -592,7 +592,7 @@ void dirty_bitmap_mig_before_vm_start(void) g_slist_free(s->enabled_bitmaps); s->enabled_bitmaps =3D NULL; =20 - qemu_mutex_unlock(&s->finish_lock); + qemu_mutex_unlock(&s->lock); } =20 static void dirty_bitmap_load_complete(QEMUFile *f, DBMLoadState *s) @@ -601,7 +601,7 @@ static void dirty_bitmap_load_complete(QEMUFile *f, DBM= LoadState *s) trace_dirty_bitmap_load_complete(); bdrv_dirty_bitmap_deserialize_finish(s->bitmap); =20 - qemu_mutex_lock(&s->finish_lock); + qemu_mutex_lock(&s->lock); =20 for (item =3D s->enabled_bitmaps; item; item =3D g_slist_next(item)) { LoadBitmapState *b =3D item->data; @@ -633,7 +633,7 @@ static void dirty_bitmap_load_complete(QEMUFile *f, DBM= LoadState *s) bdrv_dirty_bitmap_unlock(s->bitmap); } =20 - qemu_mutex_unlock(&s->finish_lock); + qemu_mutex_unlock(&s->lock); } =20 static int dirty_bitmap_load_bits(QEMUFile *f, DBMLoadState *s) @@ -815,7 +815,7 @@ static SaveVMHandlers savevm_dirty_bitmap_handlers =3D { void dirty_bitmap_mig_init(void) { QSIMPLEQ_INIT(&dbm_state.save.dbms_list); - qemu_mutex_init(&dbm_state.load.finish_lock); + qemu_mutex_init(&dbm_state.load.lock); 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.22.134; envelope-from=vsementsov@virtuozzo.com; helo=EUR05-AM6-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/24 04:43:47 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -37 X-Spam_score: -3.8 X-Spam_bar: --- X-Spam_report: (-3.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, quintela@redhat.com, qemu-devel@nongnu.org, dgilbert@redhat.com, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" bdrv_enable_dirty_bitmap_locked() call does nothing, as if we are in postcopy, bitmap successor must be enabled, and reclaim operation will enable the bitmap. So, actually we need just call _reclaim_ in both if branches, and making differences only to add an assertion seems not really good. The logic becomes simple: on load complete we do reclaim and that's all. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich --- migration/block-dirty-bitmap.c | 25 ++++--------------------- 1 file changed, 4 insertions(+), 21 deletions(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 9194807b54..405a259296 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -603,6 +603,10 @@ static void dirty_bitmap_load_complete(QEMUFile *f, DB= MLoadState *s) =20 qemu_mutex_lock(&s->lock); =20 + if (bdrv_dirty_bitmap_has_successor(s->bitmap)) { + bdrv_reclaim_dirty_bitmap(s->bitmap, &error_abort); + } + for (item =3D s->enabled_bitmaps; item; item =3D g_slist_next(item)) { LoadBitmapState *b =3D item->data; =20 @@ -612,27 +616,6 @@ static void dirty_bitmap_load_complete(QEMUFile *f, DB= MLoadState *s) } } =20 - if (bdrv_dirty_bitmap_has_successor(s->bitmap)) { - bdrv_dirty_bitmap_lock(s->bitmap); - if (s->enabled_bitmaps =3D=3D NULL) { - /* in postcopy */ - bdrv_reclaim_dirty_bitmap_locked(s->bitmap, &error_abort); - bdrv_enable_dirty_bitmap_locked(s->bitmap); - } else { - /* target not started, successor must be empty */ - int64_t count =3D bdrv_get_dirty_count(s->bitmap); - BdrvDirtyBitmap *ret =3D bdrv_reclaim_dirty_bitmap_locked(s->b= itmap, - NULL); - /* bdrv_reclaim_dirty_bitmap can fail only on no successor (it - * must be) or on merge fail, but merge can't fail when second - * bitmap is empty - */ - assert(ret =3D=3D s->bitmap && - count =3D=3D bdrv_get_dirty_count(s->bitmap)); - } - bdrv_dirty_bitmap_unlock(s->bitmap); - } - qemu_mutex_unlock(&s->lock); } =20 --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595580575; 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charset="utf-8" Keep bitmap state for disabled bitmaps too. Keep the state until the end of the process. It's needed for the following commit to implement bitmap postcopy canceling. To clean-up the new list the following logic is used: We need two events to consider bitmap migration finished: 1. chunk with DIRTY_BITMAP_MIG_FLAG_COMPLETE flag should be received 2. dirty_bitmap_mig_before_vm_start should be called These two events may come in any order, so we understand which one is last, and on the last of them we remove bitmap migration state from the list. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich --- migration/block-dirty-bitmap.c | 64 +++++++++++++++++++++++----------- 1 file changed, 43 insertions(+), 21 deletions(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 405a259296..eb4ffeac4d 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -132,6 +132,7 @@ typedef struct LoadBitmapState { BlockDriverState *bs; BdrvDirtyBitmap *bitmap; bool migrated; + bool enabled; } LoadBitmapState; =20 /* State of the dirty bitmap migration (DBM) during load process */ @@ -142,8 +143,10 @@ typedef struct DBMLoadState { BlockDriverState *bs; BdrvDirtyBitmap *bitmap; =20 - GSList *enabled_bitmaps; - QemuMutex lock; /* protect enabled_bitmaps */ + bool before_vm_start_handled; /* set in dirty_bitmap_mig_before_vm_sta= rt */ + + GSList *bitmaps; + QemuMutex lock; /* protect bitmaps */ } DBMLoadState; =20 typedef struct DBMState { @@ -526,6 +529,7 @@ static int dirty_bitmap_load_start(QEMUFile *f, DBMLoad= State *s) Error *local_err =3D NULL; uint32_t granularity =3D qemu_get_be32(f); uint8_t flags =3D qemu_get_byte(f); + LoadBitmapState *b; =20 if (s->bitmap) { error_report("Bitmap with the same name ('%s') already exists on " @@ -552,45 +556,59 @@ static int dirty_bitmap_load_start(QEMUFile *f, DBMLo= adState *s) =20 bdrv_disable_dirty_bitmap(s->bitmap); if (flags & DIRTY_BITMAP_MIG_START_FLAG_ENABLED) { - LoadBitmapState *b; - bdrv_dirty_bitmap_create_successor(s->bitmap, &local_err); if (local_err) { error_report_err(local_err); return -EINVAL; } - - b =3D g_new(LoadBitmapState, 1); - b->bs =3D s->bs; - b->bitmap =3D s->bitmap; - b->migrated =3D false; - s->enabled_bitmaps =3D g_slist_prepend(s->enabled_bitmaps, b); } =20 + b =3D g_new(LoadBitmapState, 1); + b->bs =3D s->bs; + b->bitmap =3D s->bitmap; + b->migrated =3D false; + b->enabled =3D flags & DIRTY_BITMAP_MIG_START_FLAG_ENABLED; + + s->bitmaps =3D g_slist_prepend(s->bitmaps, b); + return 0; } =20 -void dirty_bitmap_mig_before_vm_start(void) +/* + * before_vm_start_handle_item + * + * g_slist_foreach helper + * + * item is LoadBitmapState* + * opaque is DBMLoadState* + */ +static void before_vm_start_handle_item(void *item, void *opaque) { - DBMLoadState *s =3D &dbm_state.load; - GSList *item; - - qemu_mutex_lock(&s->lock); - - for (item =3D s->enabled_bitmaps; item; item =3D g_slist_next(item)) { - LoadBitmapState *b =3D item->data; + DBMLoadState *s =3D opaque; + LoadBitmapState *b =3D item; =20 + if (b->enabled) { if (b->migrated) { bdrv_enable_dirty_bitmap(b->bitmap); } else { bdrv_dirty_bitmap_enable_successor(b->bitmap); } + } =20 + if (b->migrated) { + s->bitmaps =3D g_slist_remove(s->bitmaps, b); g_free(b); } +} =20 - g_slist_free(s->enabled_bitmaps); - s->enabled_bitmaps =3D NULL; +void dirty_bitmap_mig_before_vm_start(void) +{ + DBMLoadState *s =3D &dbm_state.load; + qemu_mutex_lock(&s->lock); + + assert(!s->before_vm_start_handled); + g_slist_foreach(s->bitmaps, before_vm_start_handle_item, s); + s->before_vm_start_handled =3D true; =20 qemu_mutex_unlock(&s->lock); } @@ -607,11 +625,15 @@ static void dirty_bitmap_load_complete(QEMUFile *f, D= BMLoadState *s) bdrv_reclaim_dirty_bitmap(s->bitmap, &error_abort); } =20 - for (item =3D s->enabled_bitmaps; item; item =3D g_slist_next(item)) { + for (item =3D s->bitmaps; item; item =3D g_slist_next(item)) { LoadBitmapState *b =3D item->data; =20 if (b->bitmap =3D=3D s->bitmap) { b->migrated =3D true; + if (s->before_vm_start_handled) { + s->bitmaps =3D g_slist_remove(s->bitmaps, b); + g_free(b); + } break; } } --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595581080; cv=pass; d=zohomail.com; s=zohoarc; b=HwJcfGKUm2oGga87BI0jbJhwU7u50iqDmqLNi+ttg/ep5i+mNxysG6SdLtZ3WOQi+ulje2MK1ndXuOkSQUWU2zZ44CBWcBoQIDb9IX4toyOFzp0q8bBwSJvAD7BfRnnFvAmGdqXY8y8mEdyfUqDPbEUh31lY6g0skgZu3zz3Jdg= ARC-Message-Signature: i=2; a=rsa-sha256; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.8.95; envelope-from=vsementsov@virtuozzo.com; helo=EUR04-VI1-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/24 04:43:59 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -37 X-Spam_score: -3.8 X-Spam_bar: --- X-Spam_report: (-3.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, quintela@redhat.com, qemu-devel@nongnu.org, dgilbert@redhat.com, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" Bitmaps data is not critical, and we should not fail the migration (or use postcopy recovering) because of dirty-bitmaps migration failure. Instead we should just lose unfinished bitmaps. Still we have to report io stream violation errors, as they affect the whole migration stream. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Eric Blake --- migration/block-dirty-bitmap.c | 152 +++++++++++++++++++++++++-------- 1 file changed, 117 insertions(+), 35 deletions(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index eb4ffeac4d..c24d4614bf 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -145,6 +145,15 @@ typedef struct DBMLoadState { =20 bool before_vm_start_handled; /* set in dirty_bitmap_mig_before_vm_sta= rt */ =20 + /* + * cancelled + * Incoming migration is cancelled for some reason. That means that we + * still should read our chunks from migration stream, to not affect o= ther + * migration objects (like RAM), but just ignore them and do not touch= any + * bitmaps or nodes. + */ + bool cancelled; + GSList *bitmaps; QemuMutex lock; /* protect bitmaps */ } DBMLoadState; @@ -531,6 +540,10 @@ static int dirty_bitmap_load_start(QEMUFile *f, DBMLoa= dState *s) uint8_t flags =3D qemu_get_byte(f); LoadBitmapState *b; =20 + if (s->cancelled) { + return 0; + } + if (s->bitmap) { error_report("Bitmap with the same name ('%s') already exists on " "destination", bdrv_dirty_bitmap_name(s->bitmap)); @@ -613,13 +626,47 @@ void dirty_bitmap_mig_before_vm_start(void) qemu_mutex_unlock(&s->lock); } =20 +static void cancel_incoming_locked(DBMLoadState *s) +{ + GSList *item; + + if (s->cancelled) { + return; + } + + s->cancelled =3D true; + s->bs =3D NULL; + s->bitmap =3D NULL; + + /* Drop all unfinished bitmaps */ + for (item =3D s->bitmaps; item; item =3D g_slist_next(item)) { + LoadBitmapState *b =3D item->data; + + /* + * Bitmap must be unfinished, as finished bitmaps should already be + * removed from the list. + */ + assert(!s->before_vm_start_handled || !b->migrated); + if (bdrv_dirty_bitmap_has_successor(b->bitmap)) { + bdrv_reclaim_dirty_bitmap(b->bitmap, &error_abort); + } + bdrv_release_dirty_bitmap(b->bitmap); + } + + g_slist_free_full(s->bitmaps, g_free); + s->bitmaps =3D NULL; +} + static void dirty_bitmap_load_complete(QEMUFile *f, DBMLoadState *s) { GSList *item; trace_dirty_bitmap_load_complete(); - bdrv_dirty_bitmap_deserialize_finish(s->bitmap); =20 - qemu_mutex_lock(&s->lock); + if (s->cancelled) { + return; + } + + bdrv_dirty_bitmap_deserialize_finish(s->bitmap); =20 if (bdrv_dirty_bitmap_has_successor(s->bitmap)) { bdrv_reclaim_dirty_bitmap(s->bitmap, &error_abort); @@ -637,8 +684,6 @@ static void dirty_bitmap_load_complete(QEMUFile *f, DBM= LoadState *s) break; } } - - qemu_mutex_unlock(&s->lock); } =20 static int dirty_bitmap_load_bits(QEMUFile *f, DBMLoadState *s) @@ -650,15 +695,32 @@ static int dirty_bitmap_load_bits(QEMUFile *f, DBMLoa= dState *s) =20 if (s->flags & DIRTY_BITMAP_MIG_FLAG_ZEROES) { trace_dirty_bitmap_load_bits_zeroes(); - bdrv_dirty_bitmap_deserialize_zeroes(s->bitmap, first_byte, nr_byt= es, - false); + if (!s->cancelled) { + bdrv_dirty_bitmap_deserialize_zeroes(s->bitmap, first_byte, + nr_bytes, false); + } } else { size_t ret; uint8_t *buf; uint64_t buf_size =3D qemu_get_be64(f); - uint64_t needed_size =3D - bdrv_dirty_bitmap_serialization_size(s->bitmap, - first_byte, nr_bytes); + uint64_t needed_size; + + buf =3D g_malloc(buf_size); + ret =3D qemu_get_buffer(f, buf, buf_size); + if (ret !=3D buf_size) { + error_report("Failed to read bitmap bits"); + g_free(buf); + return -EIO; + } + + if (s->cancelled) { + g_free(buf); + return 0; + } + + needed_size =3D bdrv_dirty_bitmap_serialization_size(s->bitmap, + first_byte, + nr_bytes); =20 if (needed_size > buf_size || buf_size > QEMU_ALIGN_UP(needed_size, 4 * sizeof(long)) @@ -667,15 +729,8 @@ static int dirty_bitmap_load_bits(QEMUFile *f, DBMLoad= State *s) error_report("Migrated bitmap granularity doesn't " "match the destination bitmap '%s' granularity", bdrv_dirty_bitmap_name(s->bitmap)); - return -EINVAL; - } - - buf =3D g_malloc(buf_size); - ret =3D qemu_get_buffer(f, buf, buf_size); - if (ret !=3D buf_size) { - error_report("Failed to read bitmap bits"); - g_free(buf); - return -EIO; + cancel_incoming_locked(s); + return 0; } =20 bdrv_dirty_bitmap_deserialize_part(s->bitmap, buf, first_byte, nr_= bytes, @@ -700,14 +755,16 @@ static int dirty_bitmap_load_header(QEMUFile *f, DBML= oadState *s) error_report("Unable to read node name string"); return -EINVAL; } - s->bs =3D bdrv_lookup_bs(s->node_name, s->node_name, &local_err); - if (!s->bs) { - error_report_err(local_err); - return -EINVAL; + if (!s->cancelled) { + s->bs =3D bdrv_lookup_bs(s->node_name, s->node_name, &local_er= r); + if (!s->bs) { + error_report_err(local_err); + cancel_incoming_locked(s); + } } - } else if (!s->bs && !nothing) { + } else if (!s->bs && !nothing && !s->cancelled) { error_report("Error: block device name is not set"); - return -EINVAL; + cancel_incoming_locked(s); } =20 if (s->flags & DIRTY_BITMAP_MIG_FLAG_BITMAP_NAME) { @@ -715,24 +772,38 @@ static int dirty_bitmap_load_header(QEMUFile *f, DBML= oadState *s) error_report("Unable to read bitmap name string"); return -EINVAL; } - s->bitmap =3D bdrv_find_dirty_bitmap(s->bs, s->bitmap_name); - - /* bitmap may be NULL here, it wouldn't be an error if it is the - * first occurrence of the bitmap */ - if (!s->bitmap && !(s->flags & DIRTY_BITMAP_MIG_FLAG_START)) { - error_report("Error: unknown dirty bitmap " - "'%s' for block device '%s'", - s->bitmap_name, s->node_name); - return -EINVAL; + if (!s->cancelled) { + s->bitmap =3D bdrv_find_dirty_bitmap(s->bs, s->bitmap_name); + + /* + * bitmap may be NULL here, it wouldn't be an error if it is t= he + * first occurrence of the bitmap + */ + if (!s->bitmap && !(s->flags & DIRTY_BITMAP_MIG_FLAG_START)) { + error_report("Error: unknown dirty bitmap " + "'%s' for block device '%s'", + s->bitmap_name, s->node_name); + cancel_incoming_locked(s); + } } - } else if (!s->bitmap && !nothing) { + } else if (!s->bitmap && !nothing && !s->cancelled) { error_report("Error: block device name is not set"); - return -EINVAL; + cancel_incoming_locked(s); } =20 return 0; } =20 +/* + * dirty_bitmap_load + * + * Load sequence of dirty bitmap chunks. Return error only on fatal io str= eam + * violations. On other errors just cancel bitmaps incoming migration and = return + * 0. + * + * Note, than when incoming bitmap migration is canceled, we still must re= ad all + * our chunks (and just ignore them), to not affect other migration object= s. + */ static int dirty_bitmap_load(QEMUFile *f, void *opaque, int version_id) { DBMLoadState *s =3D &((DBMState *)opaque)->load; @@ -741,12 +812,19 @@ static int dirty_bitmap_load(QEMUFile *f, void *opaqu= e, int version_id) trace_dirty_bitmap_load_enter(); =20 if (version_id !=3D 1) { + qemu_mutex_lock(&s->lock); + cancel_incoming_locked(s); + qemu_mutex_unlock(&s->lock); return -EINVAL; } =20 do { + qemu_mutex_lock(&s->lock); + ret =3D dirty_bitmap_load_header(f, s); if (ret < 0) { + cancel_incoming_locked(s); + qemu_mutex_unlock(&s->lock); return ret; } =20 @@ -763,8 +841,12 @@ static int dirty_bitmap_load(QEMUFile *f, void *opaque= , int version_id) } =20 if (ret) { + cancel_incoming_locked(s); + qemu_mutex_unlock(&s->lock); return ret; } + + qemu_mutex_unlock(&s->lock); } while (!(s->flags & DIRTY_BITMAP_MIG_FLAG_EOS)); =20 trace_dirty_bitmap_load_success(); --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595580697; cv=pass; d=zohomail.com; s=zohoarc; b=c4JUV4/LN6BnVyjrfTntr4BRMRj8SJTRwycrkMS+wYp7spsO5P5MwB+d5XhOhP1XJZ3c8zruzcD/7+SC/nKviCEQAcxNNwKHRBvr7UdmerXVthCkDbSyBZP7+7hk6vkCYTKkmQAWWxWjIPcz8goHtreUBJL5w/taLbXbFSh2A70= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1595580697; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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charset="utf-8" If target is turned off prior to postcopy finished, target crashes because busy bitmaps are found at shutdown. Canceling incoming migration helps, as it removes all unfinished (and therefore busy) bitmaps. Similarly on source we crash in bdrv_close_all which asserts that all bdrv states are removed, because bdrv states involved into dirty bitmap migration are referenced by it. So, we need to cancel outgoing migration as well. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich --- migration/migration.h | 2 ++ migration/block-dirty-bitmap.c | 16 ++++++++++++++++ migration/migration.c | 13 +++++++++++++ 3 files changed, 31 insertions(+) diff --git a/migration/migration.h b/migration/migration.h index ab20c756f5..6c6a931d0d 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -335,6 +335,8 @@ void migrate_send_rp_recv_bitmap(MigrationIncomingState= *mis, void migrate_send_rp_resume_ack(MigrationIncomingState *mis, uint32_t valu= e); =20 void dirty_bitmap_mig_before_vm_start(void); +void dirty_bitmap_mig_cancel_outgoing(void); +void dirty_bitmap_mig_cancel_incoming(void); void migrate_add_address(SocketAddress *address); =20 int foreach_not_ignored_block(RAMBlockIterFunc func, void *opaque); diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index c24d4614bf..a198ec7278 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -657,6 +657,22 @@ static void cancel_incoming_locked(DBMLoadState *s) s->bitmaps =3D NULL; } =20 +void dirty_bitmap_mig_cancel_outgoing(void) +{ + dirty_bitmap_do_save_cleanup(&dbm_state.save); +} + +void dirty_bitmap_mig_cancel_incoming(void) +{ + DBMLoadState *s =3D &dbm_state.load; + + qemu_mutex_lock(&s->lock); + + cancel_incoming_locked(s); + + qemu_mutex_unlock(&s->lock); +} + static void dirty_bitmap_load_complete(QEMUFile *f, DBMLoadState *s) { GSList *item; diff --git a/migration/migration.c b/migration/migration.c index 1c61428988..8fe36339db 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -188,6 +188,19 @@ void migration_shutdown(void) */ migrate_fd_cancel(current_migration); object_unref(OBJECT(current_migration)); + + /* + * Cancel outgoing migration of dirty bitmaps. It should + * at least unref used block nodes. + */ + dirty_bitmap_mig_cancel_outgoing(); + + /* + * Cancel incoming migration of dirty bitmaps. Dirty bitmaps + * are non-critical data, and their loss never considered as + * something serious. + */ + dirty_bitmap_mig_cancel_incoming(); } =20 /* For outgoing */ --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595580675; cv=pass; d=zohomail.com; s=zohoarc; b=fRudmqFgP5HnPVoS+AnvbsMMl/L/9T7OCD+oMK2gt9OupOix3UXv9NMH1kqRf5GMyV4ZthJRXDEtMaGayn1B6AVJhUe2cGmH2l6nptghOioPpz/ZSXeGckiRzmniAaPRxPirNCSbF7FBIRaTTAOacQP1h+ScLbp6QiyUNERdN24= ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1595580675; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.8.95; envelope-from=vsementsov@virtuozzo.com; helo=EUR04-VI1-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/24 04:43:59 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -37 X-Spam_score: -3.8 X-Spam_bar: --- X-Spam_report: (-3.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, quintela@redhat.com, qemu-devel@nongnu.org, dgilbert@redhat.com, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" First, if only bitmaps postcopy enabled (not ram postcopy) postcopy_pause_incoming crashes on assertion assert(mis->to_src_file). And anyway, bitmaps postcopy is not prepared to be somehow recovered. The original idea instead is that if bitmaps postcopy failed, we just loss some bitmaps, which is not critical. So, on failure we just need to remove unfinished bitmaps and guest should continue execution on destination. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Dr. David Alan Gilbert Reviewed-by: Andrey Shinkevich Reviewed-by: Eric Blake --- migration/savevm.c | 37 ++++++++++++++++++++++++++++++++----- 1 file changed, 32 insertions(+), 5 deletions(-) diff --git a/migration/savevm.c b/migration/savevm.c index 45c9dd9d8a..a843d202b5 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -1813,6 +1813,9 @@ static void *postcopy_ram_listen_thread(void *opaque) MigrationIncomingState *mis =3D migration_incoming_get_current(); QEMUFile *f =3D mis->from_src_file; int load_res; + MigrationState *migr =3D migrate_get_current(); + + object_ref(OBJECT(migr)); =20 migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_POSTCOPY_ACTIVE); @@ -1839,11 +1842,24 @@ static void *postcopy_ram_listen_thread(void *opaqu= e) =20 trace_postcopy_ram_listen_thread_exit(); if (load_res < 0) { - error_report("%s: loadvm failed: %d", __func__, load_res); qemu_file_set_error(f, load_res); - migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_ACTIVE, - MIGRATION_STATUS_FAILED); - } else { + dirty_bitmap_mig_cancel_incoming(); + if (postcopy_state_get() =3D=3D POSTCOPY_INCOMING_RUNNING && + !migrate_postcopy_ram() && migrate_dirty_bitmaps()) + { + error_report("%s: loadvm failed during postcopy: %d. All state= s " + "are migrated except dirty bitmaps. Some dirty " + "bitmaps may be lost, and present migrated dirty " + "bitmaps are correctly migrated and valid.", + __func__, load_res); + load_res =3D 0; /* prevent further exit() */ + } else { + error_report("%s: loadvm failed: %d", __func__, load_res); + migrate_set_state(&mis->state, MIGRATION_STATUS_POSTCOPY_ACTIV= E, + MIGRATION_STATUS_FAILED); + } + } + if (load_res >=3D 0) { /* * This looks good, but it's possible that the device loading in t= he * main thread hasn't finished yet, and so we might not be in 'RUN' @@ -1879,6 +1895,8 @@ static void *postcopy_ram_listen_thread(void *opaque) mis->have_listen_thread =3D false; postcopy_state_set(POSTCOPY_INCOMING_END); =20 + object_unref(OBJECT(migr)); + return NULL; } =20 @@ -2437,6 +2455,8 @@ static bool postcopy_pause_incoming(MigrationIncoming= State *mis) { trace_postcopy_pause_incoming(); =20 + assert(migrate_postcopy_ram()); + /* Clear the triggered bit to allow one recovery */ mis->postcopy_recover_triggered =3D false; =20 @@ -2521,15 +2541,22 @@ out: if (ret < 0) { qemu_file_set_error(f, ret); =20 + /* Cancel bitmaps incoming regardless of recovery */ + dirty_bitmap_mig_cancel_incoming(); + /* * If we are during an active postcopy, then we pause instead * of bail out to at least keep the VM's dirty data. Note * that POSTCOPY_INCOMING_LISTENING stage is still not enough, * during which we're still receiving device states and we * still haven't yet started the VM on destination. + * + * Only RAM postcopy supports recovery. Still, if RAM postcopy is + * enabled, canceled bitmaps postcopy will not affect RAM postcopy + * recovering. */ if (postcopy_state_get() =3D=3D POSTCOPY_INCOMING_RUNNING && - postcopy_pause_incoming(mis)) { + migrate_postcopy_ram() && postcopy_pause_incoming(mis)) { /* Reset f to point to the newly created channel */ f =3D mis->from_src_file; goto retry; --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595580648; cv=pass; d=zohomail.com; s=zohoarc; b=KLcOvNK0ODrXDuJOEeJQm4ZTSPopn5bpBPs3ANpxaD4IVyQ+UcUadOTCO6NH1BGpdy3LEUAXMdUOmtP4x58ack9jGzzItQ9DtqkjQecRYgr92DVTM3hNJ+mpVkGsPs7A7eShkn2eL4n29gCu2BRBzkKaL1qjMfWrVxA6asyyYkM= ARC-Message-Signature: i=2; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.6.129; envelope-from=vsementsov@virtuozzo.com; helo=EUR04-DB3-obe.outbound.protection.outlook.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/24 04:44:00 X-ACL-Warn: Detected OS = Windows NT kernel [generic] [fuzzy] X-Spam_score_int: -37 X-Spam_score: -3.8 X-Spam_bar: --- X-Spam_report: (-3.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, fam@euphon.net, vsementsov@virtuozzo.com, quintela@redhat.com, qemu-devel@nongnu.org, dgilbert@redhat.com, stefanha@redhat.com, andrey.shinkevich@virtuozzo.com, den@openvz.org, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) Content-Type: text/plain; charset="utf-8" Move future common part to start_postcopy() method. Move checking number of bitmaps to check_bitmap(). Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich --- tests/qemu-iotests/199 | 36 +++++++++++++++++++++++------------- 1 file changed, 23 insertions(+), 13 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index d8532e49da..355c0b2885 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -29,6 +29,8 @@ disk_b =3D os.path.join(iotests.test_dir, 'disk_b') size =3D '256G' fifo =3D os.path.join(iotests.test_dir, 'mig_fifo') =20 +granularity =3D 512 +nb_bitmaps =3D 15 =20 GiB =3D 1024 * 1024 * 1024 =20 @@ -61,6 +63,15 @@ def event_dist(e1, e2): return event_seconds(e2) - event_seconds(e1) =20 =20 +def check_bitmaps(vm, count): + result =3D vm.qmp('query-block') + + if count =3D=3D 0: + assert 'dirty-bitmaps' not in result['return'][0] + else: + assert len(result['return'][0]['dirty-bitmaps']) =3D=3D count + + class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCase): def tearDown(self): if debug: @@ -101,10 +112,8 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): self.vm_a_events =3D [] self.vm_b_events =3D [] =20 - def test_postcopy(self): - granularity =3D 512 - nb_bitmaps =3D 15 - + def start_postcopy(self): + """ Run migration until RESUME event on target. Return this event.= """ for i in range(nb_bitmaps): result =3D self.vm_a.qmp('block-dirty-bitmap-add', node=3D'dri= ve0', name=3D'bitmap{}'.format(i), @@ -119,10 +128,10 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTes= tCase): =20 result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', node=3D'drive0', name=3D'bitmap0') - discards1_sha256 =3D result['return']['sha256'] + self.discards1_sha256 =3D result['return']['sha256'] =20 # Check, that updating the bitmap by discards works - assert discards1_sha256 !=3D empty_sha256 + assert self.discards1_sha256 !=3D empty_sha256 =20 # We want to calculate resulting sha256. Do it in bitmap0, so, dis= able # other bitmaps @@ -135,7 +144,7 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestC= ase): =20 result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', node=3D'drive0', name=3D'bitmap0') - all_discards_sha256 =3D result['return']['sha256'] + self.all_discards_sha256 =3D result['return']['sha256'] =20 # Now, enable some bitmaps, to be updated during migration for i in range(2, nb_bitmaps, 2): @@ -160,6 +169,10 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): =20 event_resume =3D self.vm_b.event_wait('RESUME') self.vm_b_events.append(event_resume) + return event_resume + + def test_postcopy_success(self): + event_resume =3D self.start_postcopy() =20 # enabled bitmaps should be updated apply_discards(self.vm_b, discards2) @@ -180,18 +193,15 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTes= tCase): print('downtime:', downtime) print('postcopy_time:', postcopy_time) =20 - # Assert that bitmap migration is finished (check that successor b= itmap - # is removed) - result =3D self.vm_b.qmp('query-block') - assert len(result['return'][0]['dirty-bitmaps']) =3D=3D nb_bitmaps + check_bitmaps(self.vm_b, nb_bitmaps) =20 # Check content of migrated bitmaps. Still, don't waste time check= ing # every bitmap for i in range(0, nb_bitmaps, 5): result =3D self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256', node=3D'drive0', name=3D'bitmap{}'.form= at(i)) - sha256 =3D discards1_sha256 if i % 2 else all_discards_sha256 - self.assert_qmp(result, 'return/sha256', sha256) + sha =3D self.discards1_sha256 if i % 2 else self.all_discards_= sha256 + self.assert_qmp(result, 'return/sha256', sha) =20 =20 if __name__ =3D=3D '__main__': --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; a=rsa-sha256; t=1595580680; cv=pass; d=zohomail.com; s=zohoarc; b=jSrH1X3iTDlDz1Cl0uQLbV3hrJNtCU1bIWyXL7GYOYrcN/ZQHDQBYrA8+Du8Y/GVR1rcWAgUt3CO5dqkUlnPvSz+tC17l230sm9/s1yLEjnDnonPmBxz7HvFiwGvzlfFdDAQ2w+V1OT3URZM6vq5U7sZxniTFGClQOYr8EN/do4= ARC-Message-Signature: i=2; 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charset="utf-8" Check that persistent bitmaps are not stored on source and that bitmaps are persistent on destination. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich --- tests/qemu-iotests/199 | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index 355c0b2885..5fd34f0fcd 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -117,7 +117,8 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTestC= ase): for i in range(nb_bitmaps): result =3D self.vm_a.qmp('block-dirty-bitmap-add', node=3D'dri= ve0', name=3D'bitmap{}'.format(i), - granularity=3Dgranularity) + granularity=3Dgranularity, + persistent=3DTrue) self.assert_qmp(result, 'return', {}) =20 result =3D self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256', @@ -193,6 +194,19 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): print('downtime:', downtime) print('postcopy_time:', postcopy_time) =20 + # check that there are no bitmaps stored on source + self.vm_a_events +=3D self.vm_a.get_qmp_events() + self.vm_a.shutdown() + self.vm_a.launch() + check_bitmaps(self.vm_a, 0) + + # check that bitmaps are migrated and persistence works + check_bitmaps(self.vm_b, nb_bitmaps) + self.vm_b.shutdown() + # recreate vm_b, so there is no incoming option, which prevents + # loading bitmaps from disk + self.vm_b =3D iotests.VM(path_suffix=3D'b').add_drive(disk_b) + self.vm_b.launch() check_bitmaps(self.vm_b, nb_bitmaps) =20 # Check content of migrated bitmaps. 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charset="utf-8" Previous patches fixed two crashes which may occur on shutdown prior to bitmaps postcopy finished. Check that it works now. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich Tested-by: Eric Blake --- tests/qemu-iotests/199 | 24 ++++++++++++++++++++++++ tests/qemu-iotests/199.out | 4 ++-- 2 files changed, 26 insertions(+), 2 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index 5fd34f0fcd..140930b2b1 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -217,6 +217,30 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): sha =3D self.discards1_sha256 if i % 2 else self.all_discards_= sha256 self.assert_qmp(result, 'return/sha256', sha) =20 + def test_early_shutdown_destination(self): + self.start_postcopy() + + self.vm_b_events +=3D self.vm_b.get_qmp_events() + self.vm_b.shutdown() + # recreate vm_b, so there is no incoming option, which prevents + # loading bitmaps from disk + self.vm_b =3D iotests.VM(path_suffix=3D'b').add_drive(disk_b) + self.vm_b.launch() + check_bitmaps(self.vm_b, 0) + + # Bitmaps will be lost if we just shutdown the vm, as they are mar= ked + # to skip storing to disk when prepared for migration. And that's + # correct, as actual data may be modified in target vm, so we play + # safe. + # Still, this mark would be taken away if we do 'cont', and bitmaps + # become persistent again. (see iotest 169 for such behavior case) + result =3D self.vm_a.qmp('query-status') + assert not result['return']['running'] + self.vm_a_events +=3D self.vm_a.get_qmp_events() + self.vm_a.shutdown() + self.vm_a.launch() + check_bitmaps(self.vm_a, 0) + =20 if __name__ =3D=3D '__main__': iotests.main(supported_fmts=3D['qcow2']) diff --git a/tests/qemu-iotests/199.out b/tests/qemu-iotests/199.out index ae1213e6f8..fbc63e62f8 100644 --- a/tests/qemu-iotests/199.out +++ b/tests/qemu-iotests/199.out @@ -1,5 +1,5 @@ -. +.. ---------------------------------------------------------------------- -Ran 1 tests +Ran 2 tests =20 OK --=20 2.21.0 From nobody Sun May 19 12:13:30 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; arc=pass (i=1dmarc=pass fromdomain=virtuozzo.com); dmarc=pass(p=none dis=none) header.from=virtuozzo.com ARC-Seal: i=2; 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charset="utf-8" Previous patches fixes behavior of bitmaps migration, so that errors are handled by just removing unfinished bitmaps, and not fail or try to recover postcopy migration. Add corresponding test. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Andrey Shinkevich --- tests/qemu-iotests/199 | 15 +++++++++++++++ tests/qemu-iotests/199.out | 4 ++-- 2 files changed, 17 insertions(+), 2 deletions(-) diff --git a/tests/qemu-iotests/199 b/tests/qemu-iotests/199 index 140930b2b1..58fad872a1 100755 --- a/tests/qemu-iotests/199 +++ b/tests/qemu-iotests/199 @@ -241,6 +241,21 @@ class TestDirtyBitmapPostcopyMigration(iotests.QMPTest= Case): self.vm_a.launch() check_bitmaps(self.vm_a, 0) =20 + def test_early_kill_source(self): + self.start_postcopy() + + self.vm_a_events =3D self.vm_a.get_qmp_events() + self.vm_a.kill() + + self.vm_a.launch() + + match =3D {'data': {'status': 'completed'}} + e_complete =3D self.vm_b.event_wait('MIGRATION', match=3Dmatch) + self.vm_b_events.append(e_complete) + + check_bitmaps(self.vm_a, 0) + check_bitmaps(self.vm_b, 0) + =20 if __name__ =3D=3D '__main__': iotests.main(supported_fmts=3D['qcow2']) diff --git a/tests/qemu-iotests/199.out b/tests/qemu-iotests/199.out index fbc63e62f8..8d7e996700 100644 --- a/tests/qemu-iotests/199.out +++ b/tests/qemu-iotests/199.out @@ -1,5 +1,5 @@ -.. +... ---------------------------------------------------------------------- -Ran 2 tests +Ran 3 tests =20 OK --=20 2.21.0