migration: disallow change capabilities in COLO state

COLO is not listed as running state in migrate_is_running(), so, it's
theoretically possible to disable colo capability in COLO state and the
un

migration: disallow change capabilities in COLO state

COLO is not listed as running state in migrate_is_running(), so, it's
theoretically possible to disable colo capability in COLO state and the
unexpected error in migration_iteration_finish() is reachable.

Let's disallow that in qmp_migrate_set_capabilities. Than the error
becomes absolutely unreachable: we can get into COLO state only with
enabled capability and can't disable it while we are in COLO state. So
substitute the error by simple assertion.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <20230428194928.1426370-10-vsementsov@yandex-team.ru>
Signed-off-by: Juan Quintela <quintela@redhat.com>

show more ...

colo: make colo_checkpoint_notify static and provide simpler API

colo_checkpoint_notify() is mostly used in colo.c. Outside we use it
once when x-checkpoint-delay migration parameter is set. So, let

colo: make colo_checkpoint_notify static and provide simpler API

colo_checkpoint_notify() is mostly used in colo.c. Outside we use it
once when x-checkpoint-delay migration parameter is set. So, let's
simplify the external API to only that function - notify COLO that
parameter was set. This make external API more robust and hides
implementation details from external callers. Also this helps us to
make COLO module optional in further patch (i.e. we are going to add
possibility not build the COLO module).

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Zhang Chen <chen.zhang@intel.com>
Message-Id: <20230428194928.1426370-3-vsementsov@yandex-team.ru>
Signed-off-by: Juan Quintela <quintela@redhat.com>

show more ...

Merge tag 'migration-20230505-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (20230505 edition)

In this series:
- fix block_bitmap_mapping (juan)
- RDMA

Merge tag 'migration-20230505-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (20230505 edition)

In this series:
- fix block_bitmap_mapping (juan)
- RDMA cleanup (juan)
- qemu file cleanup (juan)

Please apply.

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# gpg: aka "Juan Quintela <quintela@trasno.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03 4B82 F487 EF18 5872 D723

* tag 'migration-20230505-pull-request' of https://gitlab.com/juan.quintela/qemu:
qemu-file: Make ram_control_save_page() use accessors for rate_limit
qemu-file: Make total_transferred an uint64_t
qemu-file: remove shutdown member
qemu-file: No need to check for shutdown in qemu_file_rate_limit
migration: qemu_file_total_transferred() function is monotonic
migration: max_postcopy_bandwidth is a size parameter
migration/rdma: Check for postcopy sooner
migration/rdma: It makes no sense to recive that flag without RDMA
migration/rdma: We can calculate the rioc from the QEMUFile
migration/rdma: simplify ram_control_load_hook()
migration: Make RAM_SAVE_FLAG_HOOK a normal case entry
migration: Rename xbzrle_enabled xbzrle_started
migration: Put zero_pages in alphabetical order
migration: Document all migration_stats
migration/rdma: Don't pass the QIOChannelRDMA as an opaque
migration: Fix block_bitmap_mapping migration

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

migration: max_postcopy_bandwidth is a size parameter

So make everything that uses it uint64_t no int64_t.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Daniel P. Berrangé <berran

migration: max_postcopy_bandwidth is a size parameter

So make everything that uses it uint64_t no int64_t.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230504113841.23130-2-quintela@redhat.com>

show more ...

migration: Fix block_bitmap_mapping migration

It is valid that params->has_block_bitmap_mapping is true and
params->block_bitmap_mapping is NULL. So we can't use the trick of
having a single functi

migration: Fix block_bitmap_mapping migration

It is valid that params->has_block_bitmap_mapping is true and
params->block_bitmap_mapping is NULL. So we can't use the trick of
having a single function.

Move to two functions one for each value and the tests are fixed.

Fixes: b804b35b1c8a0edfd127ac20819c234be55ac7fc
migration: Create migrate_block_bitmap_mapping() function

Reported-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Message-Id: <20230503181036.14890-1-quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

show more ...

Merge tag 'migration-20230427-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (20230427 edition)

Hi

Everything that has been reviewed:
- stat64_set() by

Merge tag 'migration-20230427-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (20230427 edition)

Hi

Everything that has been reviewed:
- stat64_set() by paolo
- atomic_counters series fully reviewed (juan)
- move capabilities to options.c fully reviewed (juan)
- fix the channels_ready semaphore (juan)
- multifd flush optimization reviewed (juan)

Please, apply.

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# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03 4B82 F487 EF18 5872 D723

* tag 'migration-20230427-pull-request' of https://gitlab.com/juan.quintela/qemu:
migration: Make dirty_bytes_last_sync atomic
migration: Make dirty_pages_rate atomic
stat64: Add stat64_set() operation
multifd: Only flush once each full round of memory
multifd: Protect multifd_send_sync_main() calls
multifd: Create property multifd-flush-after-each-section
migration: Move migration_properties to options.c
migration: Create migrate_block_bitmap_mapping() function
migration: Create migrate_tls_hostname() function
migration: Create migrate_tls_authz() function
migration: Create migrate_tls_creds() function
migration: Remove MigrationState from block_cleanup_parameters()
migration: Move block_cleanup_parameters() to options.c
migration: Move migrate_set_block_incremental() to options.c
migration: Create migrate_downtime_limit() function
migration: Make all functions check have the same format
migration: Create migrate_params_init() function
multifd: Fix the number of channels ready

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

multifd: Only flush once each full round of memory

We need to add a new flag to mean to flush at that point.
Notice that we still flush at the end of setup and at the end of
complete stages.

Signed

multifd: Only flush once each full round of memory

We need to add a new flag to mean to flush at that point.
Notice that we still flush at the end of setup and at the end of
complete stages.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>

---

Add missing qemu_fflush(), now it passes all tests always.
In the previous version, the check that changes the default value to
false got lost in some rebase. Get it back.

show more ...

multifd: Create property multifd-flush-after-each-section

We used to flush all channels at the end of each RAM section
sent. That is not needed, so preparing to only flush after a full
iteration th

multifd: Create property multifd-flush-after-each-section

We used to flush all channels at the end of each RAM section
sent. That is not needed, so preparing to only flush after a full
iteration through all the RAM.

Default value of the property is false. But we return "true" in
migrate_multifd_flush_after_each_section() until we implement the code
in following patches.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>

---

Rename each-iteration to after-each-section
Rename multifd-sync-after-each-section to
multifd-flush-after-each-section
Move to machine-8.0 (peter)

show more ...

migration: Move migration_properties to options.c

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

migration: Create migrate_block_bitmap_mapping() function

Notice that we changed the test of ->has_block_bitmap_mapping
for the test that block_bitmap_mapping is not NULL.

Signed-off-by: Juan Quint

migration: Create migrate_block_bitmap_mapping() function

Notice that we changed the test of ->has_block_bitmap_mapping
for the test that block_bitmap_mapping is not NULL.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

---

Make it return const (vladimir)

show more ...

migration: Create migrate_tls_hostname() function

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

---

Moved the type to con

migration: Create migrate_tls_hostname() function

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

---

Moved the type to const char * (vladimir)

show more ...

migration: Create migrate_tls_authz() function

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

---

Moved the type to const

migration: Create migrate_tls_authz() function

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

---

Moved the type to const char * (vladimir)

show more ...

migration: Create migrate_tls_creds() function

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

---

Moved the type to const

migration: Create migrate_tls_creds() function

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

---

Moved the type to const char * (vladimir)

show more ...

migration: Remove MigrationState from block_cleanup_parameters()

This makes the function more regular with everything else.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir

migration: Remove MigrationState from block_cleanup_parameters()

This makes the function more regular with everything else.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

show more ...

migration: Move block_cleanup_parameters() to options.c

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

migration: Move migrate_set_block_incremental() to options.c

Once there, make it more regular and remove the need for
MigrationState parameter.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Re

migration: Move migrate_set_block_incremental() to options.c

Once there, make it more regular and remove the need for
MigrationState parameter.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

show more ...

migration: Create migrate_downtime_limit() function

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

migration: Make all functions check have the same format

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

migration: Create migrate_params_init() function

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

Merge tag 'migration-20230426-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (take2)

With respect to the last PULL request:
- fix compilation on hosts wi

Merge tag 'migration-20230426-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request (take2)

With respect to the last PULL request:
- fix compilation on hosts without userfaultd.

Please, apply.

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* tag 'migration-20230426-pull-request' of https://gitlab.com/juan.quintela/qemu:
vmstate-static-checker: Recognize "num" field
migration/vmstate-dump: Dump array size too as "num"
migration: Allow postcopy_ram_supported_by_host() to report err
migration: Move qmp_migrate_set_parameters() to options.c
migration: Move migrate_use_tls() to options.c
MAINTAINERS: Add Leonardo and Peter as reviewers
migration: Disable postcopy + multifd migration

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

migration: Allow postcopy_ram_supported_by_host() to report err

Instead of print it to STDERR, bring the error upwards so that it can be
reported via QMP responses.

E.g.:

{ "execute": "migrate-set

migration: Allow postcopy_ram_supported_by_host() to report err

Instead of print it to STDERR, bring the error upwards so that it can be
reported via QMP responses.

E.g.:

{ "execute": "migrate-set-capabilities" ,
"arguments": { "capabilities":
[ { "capability": "postcopy-ram", "state": true } ] } }

{ "error":
{ "class": "GenericError",
"desc": "Postcopy is not supported: Host backend files need to be TMPFS
or HUGETLBFS only" } }

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

show more ...

migration: Move qmp_migrate_set_parameters() to options.c

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

migration: Move migrate_use_tls() to options.c

Once there, rename it to migrate_tls() and make it return bool for
consistency.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladim

migration: Move migrate_use_tls() to options.c

Once there, rename it to migrate_tls() and make it return bool for
consistency.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

---

Fix typos found by fabiano

show more ...

migration: Disable postcopy + multifd migration

Since the introduction of multifd, it's possible to perform a multifd
migration and finish it using postcopy.

A bug introduced by yank (fixed on cfc3

migration: Disable postcopy + multifd migration

Since the introduction of multifd, it's possible to perform a multifd
migration and finish it using postcopy.

A bug introduced by yank (fixed on cfc3bcf373) was previously preventing
a successful use of this migration scenario, and now thing should be
working on most scenarios.

But since there is not enough testing/support nor any reported users for
this scenario, we should disable this combination before it may cause any
problems for users.

Suggested-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Leonardo Bras <leobras@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

show more ...

Merge tag 'migration-20230424-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request

Everything that was reviewed since last PULL request:
- fix to control flow

Merge tag 'migration-20230424-pull-request' of https://gitlab.com/juan.quintela/qemu into staging

Migration Pull request

Everything that was reviewed since last PULL request:
- fix to control flow (eric)
- rearrange of hmp commands (juan)
- Make capabilities more consistent and coherent (juan)
Not all of them reviewed yet, so only the ones reviewed.

Later, Juan.

PD. I am waiting to finish review of the compression fixes to send
them.

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# -----END PGP SIGNATURE-----
# gpg: Signature made Mon 24 Apr 2023 02:08:25 PM BST
# gpg: using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [undefined]
# gpg: aka "Juan Quintela <quintela@trasno.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03 4B82 F487 EF18 5872 D723

* tag 'migration-20230424-pull-request' of https://gitlab.com/juan.quintela/qemu: (30 commits)
migration: Create migrate_max_bandwidth() function
migration: Move migrate_postcopy() to options.c
migration: Create migrate_cpu_throttle_tailslow() function
migration: Create migrate_cpu_throttle_increment() function
migration: Create migrate_cpu_throttle_initial() to option.c
migration: Move migrate_announce_params() to option.c
migration: Create migrate_max_cpu_throttle()
migration: Create migrate_checkpoint_delay()
migration: Create migrate_throttle_trigger_threshold()
migration: Move migrate_use_block_incremental() to option.c
migration: Use migrate_max_postcopy_bandwidth()
migration: Move parameters functions to option.c
migration: Move migrate_cap_set() to options.c
migration: Move qmp_migrate_set_capabilities() to options.c
migration: Move qmp_query_migrate_capabilities() to options.c
migration: Move migrate_caps_check() to options.c
migration: Create migrate_rdma_pin_all() function
migration: Move migrate_use_return() to options.c
migration: Move migrate_use_block() to options.c
migration: Move migrate_use_xbzrle() to options.c
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

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