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* block/export: disable VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD for nowStefan Hajnoczi2021-03-191-2/+1Star
| | | | | | | | | | | | | | | | The vhost-user in-flight shmfd feature has not been tested with qemu-storage-daemon's vhost-user-blk server. Disable this optional feature for now because it requires MFD_ALLOW_SEALING, which is not available in some CI environments. If we need this feature in the future it can be re-enabled after testing. Reported-by: Peter Maydell <peter.maydell@linaro.org> Cc: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20210309094106.196911-2-stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* curl: Disconnect sockets from CURLStateMax Reitz2021-03-191-18/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a curl transfer is finished, that does not mean that CURL lets go of all the sockets it used for it. We therefore must not free a CURLSocket object before CURL has invoked curl_sock_cb() to tell us to remove it. Otherwise, we may get a use-after-free, as described in this bug report: https://bugs.launchpad.net/qemu/+bug/1916501 (Reproducer from that report: $ qemu-img convert -f qcow2 -O raw \ https://download.cirros-cloud.net/0.4.0/cirros-0.4.0-x86_64-disk.img \ out.img ) (Alternatively, it might seem logical to force-drop all sockets that have been used for a state when the respective transfer is done, kind of like it is done now, but including unsetting the AIO handlers. Unfortunately, doing so makes the driver just hang instead of crashing, which seems to evidence that CURL still uses those sockets.) Make the CURLSocket object independent of "its" CURLState by putting all sockets into a hash table belonging to the BDRVCURLState instead of a list that belongs to a CURLState. Do not touch any sockets in curl_clean_state(). Testing, it seems like all sockets are indeed gone by the time the curl BDS is closed, so it seems like there really was no point in freeing any socket just because a transfer is done. libcurl does invoke curl_sock_cb() with CURL_POLL_REMOVE for every socket it has. Buglink: https://bugs.launchpad.net/qemu/+bug/1916501 Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20210309130541.37540-3-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* curl: Store BDRVCURLState pointer in CURLSocketMax Reitz2021-03-191-4/+4
| | | | | | | | | | | A socket does not really belong to any specific state. We do not need to store a pointer to "its" state in it, a pointer to the common BDRVCURLState is sufficient. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20210309130541.37540-2-mreitz@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* stream: Don't crash when node permission is deniedKevin Wolf2021-03-191-4/+11
| | | | | | | | | | | | | | The image streaming block job restricts shared permissions of the nodes it accesses. This can obviously fail when other users already got these permissions. &error_abort is therefore wrong and can crash. Handle these errors gracefully and just fail starting the block job. Reported-by: Nini Gu <ngu@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <20210309173451.45152-1-kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* block: remove support for using "file" driver with block/char devicesDaniel P. Berrangé2021-03-181-11/+6Star
| | | | | | | The 'host_device' and 'host_cdrom' drivers must be used instead. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
* block: remove 'dirty-bitmaps' field from 'BlockInfo' structDaniel P. Berrangé2021-03-181-5/+0Star
| | | | | | | The same data is available in the 'BlockDeviceInfo' struct. Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
* block: remove dirty bitmaps 'status' fieldDaniel P. Berrangé2021-03-181-38/+0Star
| | | | | | | The same information is available via the 'recording' and 'busy' fields. Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
* block: remove 'encryption_key_missing' flag from QAPIDaniel P. Berrangé2021-03-181-1/+0Star
| | | | | | | | | | This has been hardcoded to "false" since 2.10.0, since secrets required to unlock block devices are now always provided up front instead of using interactive prompts. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
* Merge remote-tracking branch ↵Peter Maydell2021-03-111-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'remotes/vivier2/tags/trivial-branch-for-6.0-pull-request' into staging Pull request # gpg: Signature made Wed 10 Mar 2021 21:56:09 GMT # gpg: using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C # gpg: issuer "laurent@vivier.eu" # gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full] # gpg: aka "Laurent Vivier <laurent@vivier.eu>" [full] # gpg: aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full] # Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F 5173 F30C 38BD 3F2F BE3C * remotes/vivier2/tags/trivial-branch-for-6.0-pull-request: (22 commits) sysemu: Let VMChangeStateHandler take boolean 'running' argument sysemu/runstate: Let runstate_is_running() return bool hw/lm32/Kconfig: Have MILKYMIST select LM32_DEVICES hw/lm32/Kconfig: Rename CONFIG_LM32 -> CONFIG_LM32_DEVICES hw/lm32/Kconfig: Introduce CONFIG_LM32_EVR for lm32-evr/uclinux boards qemu-common.h: Update copyright string to 2021 tests/fp/fp-test: Replace the word 'blacklist' qemu-options: Replace the word 'blacklist' seccomp: Replace the word 'blacklist' scripts/tracetool: Replace the word 'whitelist' ui: Replace the word 'whitelist' virtio-gpu: Adjust code space style exec/memory: Use struct Object typedef fuzz-test: remove unneccessary debugging flags net: Use id_generate() in the network subsystem, too MAINTAINERS: Fix the location of tools manuals vhost_user_gpu: Drop dead check for g_malloc() failure backends/dbus-vmstate: Fix short read error handling target/hexagon/gen_tcg_funcs: Fix a typo hw/elf_ops: Fix a typo ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * sysemu: Let VMChangeStateHandler take boolean 'running' argumentPhilippe Mathieu-Daudé2021-03-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | The 'running' argument from VMChangeStateHandler does not require other value than 0 / 1. Make it a plain boolean. Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Acked-by: David Gibson <david@gibson.dropbear.id.au> Message-Id: <20210111152020.1422021-3-philmd@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
* | Merge remote-tracking branch 'remotes/ericb/tags/pull-nbd-2021-03-09' into ↵Peter Maydell2021-03-1110-111/+103Star
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | staging nbd patches for 2021-03-09 - Add Vladimir as NBD co-maintainer - Fix reporting of holes in NBD_CMD_BLOCK_STATUS - Improve command-line parsing accuracy of large numbers (anything going through qemu_strtosz), including the deprecation of hex+suffix - Improve some error reporting in the block layer # gpg: Signature made Tue 09 Mar 2021 15:38:10 GMT # gpg: using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A # gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full] # gpg: aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full] # gpg: aka "[jpeg image of size 6874]" [full] # Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2 F3AA A7A1 6B4A 2527 436A * remotes/ericb/tags/pull-nbd-2021-03-09: block/qcow2: refactor qcow2_update_options_prepare error paths block/qed: bdrv_qed_do_open: deal with errp block/qcow2: simplify qcow2_co_invalidate_cache() block/qcow2: read_cache_sizes: return status value block/qcow2-bitmap: return status from qcow2_store_persistent_dirty_bitmaps block/qcow2-bitmap: improve qcow2_load_dirty_bitmaps() interface block/qcow2: qcow2_get_specific_info(): drop error propagation blockjob: return status from block_job_set_speed() block/mirror: drop extra error propagation in commit_active_start() block: drop extra error propagation for bdrv_set_backing_hd blockdev: fix drive_backup_prepare() missed error block: check return value of bdrv_open_child and drop error propagation utils: Deprecate hex-with-suffix sizes utils: Improve qemu_strtosz() to have 64 bits of precision utils: Enhance testsuite for do_strtosz() nbd: server: Report holes for raw images MAINTAINERS: add Vladimir as co-maintainer of NBD Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * | block/qcow2: refactor qcow2_update_options_prepare error pathsVladimir Sementsov-Ogievskiy2021-03-081-3/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Keep setting ret close to setting errp and don't merge different error paths into one. This way it's more obvious that we don't return error without setting errp. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20210202124956.63146-15-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
| * | block/qed: bdrv_qed_do_open: deal with errpVladimir Sementsov-Ogievskiy2021-03-081-9/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Always set errp on failure. The generic bdrv_open_driver supports driver functions which can return a negative value but forget to set errp. That's a strange thing. Let's improve bdrv_qed_do_open to not behave this way. This allows the simplification of code in bdrv_qed_co_invalidate_cache(). Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Greg Kurz <groug@kaod.org> Message-Id: <20210202124956.63146-14-vsementsov@virtuozzo.com> [eblake: commit message grammar tweak] Signed-off-by: Eric Blake <eblake@redhat.com>
| * | block/qcow2: simplify qcow2_co_invalidate_cache()Vladimir Sementsov-Ogievskiy2021-03-081-9/+4Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | qcow2_do_open correctly sets errp on each failure path. So, we can simplify code in qcow2_co_invalidate_cache() and drop explicit error propagation. Add ERRP_GUARD() as mandated by the documentation in include/qapi/error.h so that error_prepend() is actually called even if errp is &error_fatal. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Greg Kurz <groug@kaod.org> Message-Id: <20210202124956.63146-13-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
| * | block/qcow2: read_cache_sizes: return status valueVladimir Sementsov-Ogievskiy2021-03-081-10/+9Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's better to return status together with setting errp. It allows to reduce error propagation. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20210202124956.63146-12-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
| * | block/qcow2-bitmap: return status from qcow2_store_persistent_dirty_bitmapsVladimir Sementsov-Ogievskiy2021-03-082-8/+7Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's better to return status together with setting errp. It makes possible to avoid error propagation. While being here, put ERRP_GUARD() to fix error_prepend(errp, ...) usage inside qcow2_store_persistent_dirty_bitmaps() (see the comment above ERRP_GUARD() definition in include/qapi/error.h) Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20210202124956.63146-11-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
| * | block/qcow2-bitmap: improve qcow2_load_dirty_bitmaps() interfaceVladimir Sementsov-Ogievskiy2021-03-083-16/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's recommended for bool functions with errp to return true on success and false on failure. Non-standard interfaces don't help to understand the code. The change is also needed to reduce error propagation. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Greg Kurz <groug@kaod.org> Message-Id: <20210202124956.63146-10-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
| * | block/qcow2: qcow2_get_specific_info(): drop error propagationVladimir Sementsov-Ogievskiy2021-03-083-21/+19Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't use error propagation in qcow2_get_specific_info(). For this refactor qcow2_get_bitmap_info_list, its current interface is rather weird. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210202124956.63146-9-vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> [eblake: separate local 'tail' variable from 'info_list' parameter] Signed-off-by: Eric Blake <eblake@redhat.com>
| * | block/mirror: drop extra error propagation in commit_active_start()Vladimir Sementsov-Ogievskiy2021-03-081-7/+5Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let's check return value of mirror_start_job to check for failure instead of local_err. Rename ret to job, as ret is usually integer variable. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20210202124956.63146-7-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
| * | block: check return value of bdrv_open_child and drop error propagationVladimir Sementsov-Ogievskiy2021-03-086-28/+17Star
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is generated by cocci script: @@ symbol bdrv_open_child, errp, local_err; expression file; @@ file = bdrv_open_child(..., - &local_err + errp ); - if (local_err) + if (!file) { ... - error_propagate(errp, local_err); ... } with command spatch --sp-file x.cocci --macro-file scripts/cocci-macro-file.h \ --in-place --no-show-diff --max-width 80 --use-gitgrep block Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Greg Kurz <groug@kaod.org> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20210202124956.63146-4-vsementsov@virtuozzo.com> [eblake: fix qcow2_do_open() to use ERRP_GUARD, necessary as the only caller to pass allow_none=true] Signed-off-by: Eric Blake <eblake@redhat.com>
* | Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into stagingPeter Maydell2021-03-099-49/+477
|\ \ | |/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Block layer patches: - qemu-storage-daemon: add --pidfile option - qemu-storage-daemon: CLI error messages include the option name now - vhost-user-blk export: Misc fixes - docs: Improvements for qemu-storage-daemon documentation - parallels: load bitmap extension - backup-top: Don't crash on post-finalize accesses - Improve error messages related to node-name options - iotests improvements # gpg: Signature made Mon 08 Mar 2021 17:01:41 GMT # gpg: using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6 # gpg: issuer "kwolf@redhat.com" # gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full] # Primary key fingerprint: DC3D EB15 9A9A F95D 3D74 56FE 7F09 B272 C88F 2FD6 * remotes/kevin/tags/for-upstream: (30 commits) blockdev: Clarify error messages pertaining to 'node-name' block: Clarify error messages pertaining to 'node-name' docs: qsd: Explain --export nbd,name=... default MAINTAINERS: update parallels block driver iotests: add parallels-read-bitmap test iotests.py: add unarchive_sample_image() helper parallels: support bitmap extension for read-only mode block/parallels: BDRVParallelsState: add cluster_size field parallels.txt: fix bitmap L1 table description qcow2-bitmap: make bytes_covered_by_bitmap_cluster() public block/export: port virtio-blk read/write range check block/export: port virtio-blk discard/write zeroes input validation block/export: fix vhost-user-blk export sector number calculation block/export: use VIRTIO_BLK_SECTOR_BITS block/export: fix blk_size double byteswap libqtest: add qtest_remove_abrt_handler() libqtest: add qtest_kill_qemu() libqtest: add qtest_socket_server() vhost-user-blk: fix blkcfg->num_queues endianness docs: replace insecure /tmp examples in qsd docs ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * parallels: support bitmap extension for read-only modeVladimir Sementsov-Ogievskiy2021-03-084-2/+325
| | | | | | | | | | | | | | Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210224104707.88430-5-vsementsov@virtuozzo.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * block/parallels: BDRVParallelsState: add cluster_size fieldVladimir Sementsov-Ogievskiy2021-03-082-4/+5
| | | | | | | | | | | | | | | | | | | | We are going to use it in more places, calculating "s->tracks << BDRV_SECTOR_BITS" doesn't look good. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210224104707.88430-4-vsementsov@virtuozzo.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * qcow2-bitmap: make bytes_covered_by_bitmap_cluster() publicVladimir Sementsov-Ogievskiy2021-03-082-14/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | Rename bytes_covered_by_bitmap_cluster() to bdrv_dirty_bitmap_serialization_coverage() and make it public. It is needed as we are going to share it with bitmap loading in parallels format. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Denis V. Lunev <den@openvz.org> Message-Id: <20210224104707.88430-2-vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * block/export: port virtio-blk read/write range checkStefan Hajnoczi2021-03-081-3/+16
| | | | | | | | | | | | | | | | Check that the sector number and byte count are valid. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20210223144653.811468-13-stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * block/export: port virtio-blk discard/write zeroes input validationStefan Hajnoczi2021-03-081-23/+93
| | | | | | | | | | | | | | | | | | | | Validate discard/write zeroes the same way we do for virtio-blk. Some of these checks are mandated by the VIRTIO specification, others are internal to QEMU. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20210223144653.811468-11-stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * block/export: fix vhost-user-blk export sector number calculationStefan Hajnoczi2021-03-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver is supposed to honor the blk_size field but the protocol still uses 512-byte sector numbers. It is incorrect to multiply req->sector_num by blk_size. VIRTIO 1.1 5.2.5 Device Initialization says: blk_size can be read to determine the optimal sector size for the driver to use. This does not affect the units used in the protocol (always 512 bytes), but awareness of the correct value can affect performance. Fixes: 3578389bcf76c824a5d82e6586a6f0c71e56f2aa ("block/export: vhost-user block device backend server") Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20210223144653.811468-10-stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * block/export: use VIRTIO_BLK_SECTOR_BITSStefan Hajnoczi2021-03-081-3/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use VIRTIO_BLK_SECTOR_BITS and VIRTIO_BLK_SECTOR_SIZE when dealing with virtio-blk sector numbers. Although the values happen to be the same as BDRV_SECTOR_BITS and BDRV_SECTOR_SIZE, they are conceptually different. This makes it clearer when we are dealing with virtio-blk sector units. Use VIRTIO_BLK_SECTOR_BITS in vu_blk_initialize_config(). Later patches will use it the new constants the virtqueue request processing code path. Suggested-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20210223144653.811468-9-stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * block/export: fix blk_size double byteswapStefan Hajnoczi2021-03-081-1/+1
| | | | | | | | | | | | | | | | | | | | The config->blk_size field is little-endian. Use the native-endian blk_size variable to avoid double byteswapping. Fixes: 11f60f7eaee2630dd6fa0c3a8c49f792e46c4cf1 ("block/export: make vhost-user-blk config space little-endian") Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-Id: <20210223144653.811468-8-stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * backup-top: Refuse I/O in inactive stateMax Reitz2021-03-081-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the backup-top node transitions from active to inactive in bdrv_backup_top_drop(), the BlockCopyState is freed and the filtered child is removed, so the node effectively becomes unusable. However, noone told its I/O functions this, so they will happily continue accessing bs->backing and s->bcs. Prevent that by aborting early when s->active is false. (After the preceding patch, the node should be gone after bdrv_backup_top_drop(), so this should largely be a theoretical problem. But still, better to be safe than sorry, and also I think it just makes sense to check s->active in the I/O functions.) Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20210219153348.41861-3-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
| * backup: Remove nodes from job in .clean()Max Reitz2021-03-081-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The block job holds a reference to the backup-top node (because it is passed as the main job BDS to block_job_create()). Therefore, bdrv_backup_top_drop() cannot delete the backup-top node (replacing it by its child does not affect the job parent, because that has .stay_at_node set). That is a problem, because all of its I/O functions assume the BlockCopyState (s->bcs) to be valid and that it has a filtered child; but after bdrv_backup_top_drop(), neither of those things are true. It does not make sense to add new parents to backup-top after backup_clean(), so we should detach it from the job before bdrv_backup_top_drop(). Because there is no function to do that for a single node, just detach all of the job's nodes -- the job does not do anything past backup_clean() anyway. Signed-off-by: Max Reitz <mreitz@redhat.com> Message-Id: <20210219153348.41861-2-mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* | qemu-config: add error propagation to qemu_config_parsePaolo Bonzini2021-03-061-2/+1Star
|/ | | | | | | | | | | | | | | | | | | | | | | | This enables some simplification of vl.c via error_fatal, and improves error messages. Before: $ ./qemu-system-x86_64 -readconfig . qemu-system-x86_64: error reading file qemu-system-x86_64: -readconfig .: read config .: Invalid argument $ /usr/libexec/qemu-kvm -readconfig foo qemu-kvm: -readconfig foo: read config foo: No such file or directory After: $ ./qemu-system-x86_64 -readconfig . qemu-system-x86_64: -readconfig .: Cannot read config file: Is a directory $ ./qemu-system-x86_64 -readconfig foo qemu-system-x86_64: -readconfig foo: Could not open 'foo': No such file or directory Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210226170816.231173-1-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* block: qcow2: remove the created file on initialization errorMaxim Levitsky2021-02-151-3/+5
| | | | | | | | | | | | | If the qcow initialization fails, we should remove the file if it was already created, to avoid leaving stale files around. We already do this for luks raw images. Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20201217170904.946013-4-mlevitsk@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* block: add bdrv_co_delete_file_noerrMaxim Levitsky2021-02-151-13/+2Star
| | | | | | | | | | | | | | | This function wraps bdrv_co_delete_file for the common case of removing a file, which was just created by format driver, on an error condition. It hides the -ENOTSUPP error, and reports all other errors otherwise. Use it in luks driver Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20201217170904.946013-3-mlevitsk@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* crypto: luks: Fix tiny memory leakMaxim Levitsky2021-02-151-0/+2
| | | | | | | | | | | When the underlying block device doesn't support the bdrv_co_delete_file interface, an 'Error' object was leaked. Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20201217170904.946013-2-mlevitsk@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* Merge remote-tracking branch 'remotes/ericb/tags/pull-bitmaps-2021-02-12' ↵Peter Maydell2021-02-133-20/+15Star
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | into staging bitmaps patches for 2021-02-12 - add 'transform' member to manipulate bitmaps across migration - work towards better error handling during bdrv_open # gpg: Signature made Fri 12 Feb 2021 23:19:39 GMT # gpg: using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A # gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full] # gpg: aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full] # gpg: aka "[jpeg image of size 6874]" [full] # Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2 F3AA A7A1 6B4A 2527 436A * remotes/ericb/tags/pull-bitmaps-2021-02-12: block: use return status of bdrv_append() block: return status from bdrv_append and friends qemu-iotests: 300: Add test case for modifying persistence of bitmap migration: dirty-bitmap: Allow control of bitmap persistence migration: dirty-bitmap: Use struct for alias map inner members Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| * block: use return status of bdrv_append()Vladimir Sementsov-Ogievskiy2021-02-123-20/+15Star
| | | | | | | | | | | | | | | | | | | | Now bdrv_append returns status and we can drop all the local_err things around it. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-Id: <20210202124956.63146-3-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* | block/backup: implement .cancel job handlerVladimir Sementsov-Ogievskiy2021-02-121-0/+10
| | | | | | | | | | | | | | | | | | Cancel in-flight io on target to not waste the time. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210205163720.887197-10-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* | block/mirror: implement .cancel job handlerVladimir Sementsov-Ogievskiy2021-02-121-0/+9
| | | | | | | | | | | | | | | | | | Cancel in-flight io on target to not waste the time. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210205163720.887197-6-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* | block/raw-format: implement .bdrv_cancel_in_flight handlerVladimir Sementsov-Ogievskiy2021-02-121-0/+6
| | | | | | | | | | | | | | | | | | | | | | We are going to cancel in-flight requests on mirror nbd target on job cancel. Still nbd is often used not directly but as raw-format child. So, add pass-through handler here. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210205163720.887197-4-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* | block/nbd: implement .bdrv_cancel_in_flightVladimir Sementsov-Ogievskiy2021-02-121-0/+15
| | | | | | | | | | | | | | | | | | Just stop waiting for connection in existing requests. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210205163720.887197-3-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* | block: add new BlockDriver handler: bdrv_cancel_in_flightVladimir Sementsov-Ogievskiy2021-02-121-0/+11
|/ | | | | | | | | It will be used to stop retrying NBD requests on mirror cancel. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210205163720.887197-2-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* block: rename and alter bdrv_all_find_snapshot semanticsDaniel P. Berrangé2021-02-082-8/+13
| | | | | | | | | | | | | | | Currently bdrv_all_find_snapshot() will return 0 if it finds a snapshot, -1 if an error occurs, or if it fails to find a snapshot. New callers to be added want to distinguish between the error scenario and failing to find a snapshot. Rename it to bdrv_all_has_snapshot and make it return -1 on error, 0 if no snapshot is found and 1 if snapshot is found. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-7-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* block: allow specifying name of block device for vmstate storageDaniel P. Berrangé2021-02-082-4/+24
| | | | | | | | | | | | | Currently the vmstate will be stored in the first block device that supports snapshots. Historically this would have usually been the root device, but with UEFI it might be the variable store. There needs to be a way to override the choice of block device to store the state in. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-6-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* block: add ability to specify list of blockdevs during snapshotDaniel P. Berrangé2021-02-082-45/+131
| | | | | | | | | | | | | | | | When running snapshot operations, there are various rules for which blockdevs are included/excluded. While this provides reasonable default behaviour, there are scenarios that are not well handled by the default logic. Some of the conditions do not have a single correct answer. Thus there needs to be a way for the mgmt app to provide an explicit list of blockdevs to perform snapshots across. This can be achieved by passing a list of node names that should be used. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-5-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* block: push error reporting into bdrv_all_*_snapshot functionsDaniel P. Berrangé2021-02-082-41/+43
| | | | | | | | | | | | | | | | | The bdrv_all_*_snapshot functions return a BlockDriverState pointer for the invalid backend, which the callers then use to report an error message. In some cases multiple callers are reporting the same error message, but with slightly different text. In the future there will be more error scenarios for some of these methods, which will benefit from fine grained error message reporting. So it is helpful to push error reporting down a level. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> [PMD: Initialize variables] Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20210204124834.774401-2-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
* block/nbd: only enter connection coroutine if it's presentRoman Kagan2021-02-031-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When an NBD block driver state is moved from one aio_context to another (e.g. when doing a drain in a migration thread), nbd_client_attach_aio_context_bh is executed that enters the connection coroutine. However, the assumption that ->connection_co is always present here appears incorrect: the connection may have encountered an error other than -EIO in the underlying transport, and thus may have decided to quit rather than keep trying to reconnect, and therefore it may have terminated the connection coroutine. As a result an attempt to reassign the client in this state (NBD_CLIENT_QUIT) to a different aio_context leads to a null pointer dereference: #0 qio_channel_detach_aio_context (ioc=0x0) at /build/qemu-gYtjVn/qemu-5.0.1/io/channel.c:452 #1 0x0000562a242824b3 in bdrv_detach_aio_context (bs=0x562a268d6a00) at /build/qemu-gYtjVn/qemu-5.0.1/block.c:6151 #2 bdrv_set_aio_context_ignore (bs=bs@entry=0x562a268d6a00, new_context=new_context@entry=0x562a260c9580, ignore=ignore@entry=0x7feeadc9b780) at /build/qemu-gYtjVn/qemu-5.0.1/block.c:6230 #3 0x0000562a24282969 in bdrv_child_try_set_aio_context (bs=bs@entry=0x562a268d6a00, ctx=0x562a260c9580, ignore_child=<optimized out>, errp=<optimized out>) at /build/qemu-gYtjVn/qemu-5.0.1/block.c:6332 #4 0x0000562a242bb7db in blk_do_set_aio_context (blk=0x562a2735d0d0, new_context=0x562a260c9580, update_root_node=update_root_node@entry=true, errp=errp@entry=0x0) at /build/qemu-gYtjVn/qemu-5.0.1/block/block-backend.c:1989 #5 0x0000562a242be0bd in blk_set_aio_context (blk=<optimized out>, new_context=<optimized out>, errp=errp@entry=0x0) at /build/qemu-gYtjVn/qemu-5.0.1/block/block-backend.c:2010 #6 0x0000562a23fbd953 in virtio_blk_data_plane_stop (vdev=<optimized out>) at /build/qemu-gYtjVn/qemu-5.0.1/hw/block/dataplane/virtio-blk.c:292 #7 0x0000562a241fc7bf in virtio_bus_stop_ioeventfd (bus=0x562a260dbf08) at /build/qemu-gYtjVn/qemu-5.0.1/hw/virtio/virtio-bus.c:245 #8 0x0000562a23fefb2e in virtio_vmstate_change (opaque=0x562a260dbf90, running=0, state=<optimized out>) at /build/qemu-gYtjVn/qemu-5.0.1/hw/virtio/virtio.c:3220 #9 0x0000562a2402ebfd in vm_state_notify (running=running@entry=0, state=state@entry=RUN_STATE_FINISH_MIGRATE) at /build/qemu-gYtjVn/qemu-5.0.1/softmmu/vl.c:1275 #10 0x0000562a23f7bc02 in do_vm_stop (state=RUN_STATE_FINISH_MIGRATE, send_stop=<optimized out>) at /build/qemu-gYtjVn/qemu-5.0.1/cpus.c:1032 #11 0x0000562a24209765 in migration_completion (s=0x562a260e83a0) at /build/qemu-gYtjVn/qemu-5.0.1/migration/migration.c:2914 #12 migration_iteration_run (s=0x562a260e83a0) at /build/qemu-gYtjVn/qemu-5.0.1/migration/migration.c:3275 #13 migration_thread (opaque=opaque@entry=0x562a260e83a0) at /build/qemu-gYtjVn/qemu-5.0.1/migration/migration.c:3439 #14 0x0000562a2435ca96 in qemu_thread_start (args=<optimized out>) at /build/qemu-gYtjVn/qemu-5.0.1/util/qemu-thread-posix.c:519 #15 0x00007feed31466ba in start_thread (arg=0x7feeadc9c700) at pthread_create.c:333 #16 0x00007feed2e7c41d in __GI___sysctl (name=0x0, nlen=608471908, oldval=0x562a2452b138, oldlenp=0x0, newval=0x562a2452c5e0 <__func__.28102>, newlen=0) at ../sysdeps/unix/sysv/linux/sysctl.c:30 #17 0x0000000000000000 in ?? () Fix it by checking that the connection coroutine is non-null before trying to enter it. If it is null, no entering is needed, as the connection is probably going down anyway. Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210129073859.683063-3-rvkagan@yandex-team.ru> Signed-off-by: Eric Blake <eblake@redhat.com>
* block/nbd: only detach existing iochannel from aio_contextRoman Kagan2021-02-031-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When the reconnect in NBD client is in progress, the iochannel used for NBD connection doesn't exist. Therefore an attempt to detach it from the aio_context of the parent BlockDriverState results in a NULL pointer dereference. The problem is triggerable, in particular, when an outgoing migration is about to finish, and stopping the dataplane tries to move the BlockDriverState from the iothread aio_context to the main loop. If the NBD connection is lost before this point, and the NBD client has entered the reconnect procedure, QEMU crashes: #0 qemu_aio_coroutine_enter (ctx=0x5618056c7580, co=0x0) at /build/qemu-6MF7tq/qemu-5.0.1/util/qemu-coroutine.c:109 #1 0x00005618034b1b68 in nbd_client_attach_aio_context_bh ( opaque=0x561805ed4c00) at /build/qemu-6MF7tq/qemu-5.0.1/block/nbd.c:164 #2 0x000056180353116b in aio_wait_bh (opaque=0x7f60e1e63700) at /build/qemu-6MF7tq/qemu-5.0.1/util/aio-wait.c:55 #3 0x0000561803530633 in aio_bh_call (bh=0x7f60d40a7e80) at /build/qemu-6MF7tq/qemu-5.0.1/util/async.c:136 #4 aio_bh_poll (ctx=ctx@entry=0x5618056c7580) at /build/qemu-6MF7tq/qemu-5.0.1/util/async.c:164 #5 0x0000561803533e5a in aio_poll (ctx=ctx@entry=0x5618056c7580, blocking=blocking@entry=true) at /build/qemu-6MF7tq/qemu-5.0.1/util/aio-posix.c:650 #6 0x000056180353128d in aio_wait_bh_oneshot (ctx=0x5618056c7580, cb=<optimized out>, opaque=<optimized out>) at /build/qemu-6MF7tq/qemu-5.0.1/util/aio-wait.c:71 #7 0x000056180345c50a in bdrv_attach_aio_context (new_context=0x5618056c7580, bs=0x561805ed4c00) at /build/qemu-6MF7tq/qemu-5.0.1/block.c:6172 #8 bdrv_set_aio_context_ignore (bs=bs@entry=0x561805ed4c00, new_context=new_context@entry=0x5618056c7580, ignore=ignore@entry=0x7f60e1e63780) at /build/qemu-6MF7tq/qemu-5.0.1/block.c:6237 #9 0x000056180345c969 in bdrv_child_try_set_aio_context ( bs=bs@entry=0x561805ed4c00, ctx=0x5618056c7580, ignore_child=<optimized out>, errp=<optimized out>) at /build/qemu-6MF7tq/qemu-5.0.1/block.c:6332 #10 0x00005618034957db in blk_do_set_aio_context (blk=0x56180695b3f0, new_context=0x5618056c7580, update_root_node=update_root_node@entry=true, errp=errp@entry=0x0) at /build/qemu-6MF7tq/qemu-5.0.1/block/block-backend.c:1989 #11 0x00005618034980bd in blk_set_aio_context (blk=<optimized out>, new_context=<optimized out>, errp=errp@entry=0x0) at /build/qemu-6MF7tq/qemu-5.0.1/block/block-backend.c:2010 #12 0x0000561803197953 in virtio_blk_data_plane_stop (vdev=<optimized out>) at /build/qemu-6MF7tq/qemu-5.0.1/hw/block/dataplane/virtio-blk.c:292 #13 0x00005618033d67bf in virtio_bus_stop_ioeventfd (bus=0x5618056d9f08) at /build/qemu-6MF7tq/qemu-5.0.1/hw/virtio/virtio-bus.c:245 #14 0x00005618031c9b2e in virtio_vmstate_change (opaque=0x5618056d9f90, running=0, state=<optimized out>) at /build/qemu-6MF7tq/qemu-5.0.1/hw/virtio/virtio.c:3220 #15 0x0000561803208bfd in vm_state_notify (running=running@entry=0, state=state@entry=RUN_STATE_FINISH_MIGRATE) at /build/qemu-6MF7tq/qemu-5.0.1/softmmu/vl.c:1275 #16 0x0000561803155c02 in do_vm_stop (state=RUN_STATE_FINISH_MIGRATE, send_stop=<optimized out>) at /build/qemu-6MF7tq/qemu-5.0.1/cpus.c:1032 #17 0x00005618033e3765 in migration_completion (s=0x5618056e6960) at /build/qemu-6MF7tq/qemu-5.0.1/migration/migration.c:2914 #18 migration_iteration_run (s=0x5618056e6960) at /build/qemu-6MF7tq/qemu-5.0.1/migration/migration.c:3275 #19 migration_thread (opaque=opaque@entry=0x5618056e6960) at /build/qemu-6MF7tq/qemu-5.0.1/migration/migration.c:3439 #20 0x0000561803536ad6 in qemu_thread_start (args=<optimized out>) at /build/qemu-6MF7tq/qemu-5.0.1/util/qemu-thread-posix.c:519 #21 0x00007f61085d06ba in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 #22 0x00007f610830641d in sysctl () from /lib/x86_64-linux-gnu/libc.so.6 #23 0x0000000000000000 in ?? () Fix it by checking that the iochannel is non-null before trying to detach it from the aio_context. If it is null, no detaching is needed, and it will get reattached in the proper aio_context once the connection is reestablished. Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210129073859.683063-2-rvkagan@yandex-team.ru> Signed-off-by: Eric Blake <eblake@redhat.com>
* block/io: use int64_t bytes in copy_rangeVladimir Sementsov-Ogievskiy2021-02-032-13/+13
| | | | | | | | | | | | | | | | | | | | | | | | | We are generally moving to int64_t for both offset and bytes parameters on all io paths. Main motivation is realization of 64-bit write_zeroes operation for fast zeroing large disk chunks, up to the whole disk. We chose signed type, to be consistent with off_t (which is signed) and with possibility for signed return type (where negative value means error). So, convert now copy_range parameters which are already 64bit to signed type. It's safe as we don't work with requests overflowing BDRV_MAX_LENGTH (which is less than INT64_MAX), and do check the requests in bdrv_co_copy_range_internal() (by bdrv_check_request32(), which calls bdrv_check_request()). Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20201211183934.169161-17-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* block/io: support int64_t bytes in read/write wrappersVladimir Sementsov-Ogievskiy2021-02-033-9/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | We are generally moving to int64_t for both offset and bytes parameters on all io paths. Main motivation is realization of 64-bit write_zeroes operation for fast zeroing large disk chunks, up to the whole disk. We chose signed type, to be consistent with off_t (which is signed) and with possibility for signed return type (where negative value means error). Now, since bdrv_co_preadv_part() and bdrv_co_pwritev_part() have been updated, update all their wrappers. For all of them type of 'bytes' is widening, so callers are safe. We have update request_fn in blkverify.c simultaneously. Still it's just a pointer to one of bdrv_co_pwritev() or bdrv_co_preadv(), and type is widening for callers of the request_fn anyway. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20201211183934.169161-16-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> [eblake: grammar tweak] Signed-off-by: Eric Blake <eblake@redhat.com>
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