mirror of
https://github.com/Motorhead1991/qemu.git
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0c8022876f
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 driver discard handlers bytes parameter to int64_t. The only caller of all updated function is bdrv_co_pdiscard in block/io.c. It is already prepared to work with 64bit requests, but pass at most max(bs->bl.max_pdiscard, INT_MAX) to the driver. Let's look at all updated functions: blkdebug: all calculations are still OK, thanks to bdrv_check_qiov_request(). both rule_check and bdrv_co_pdiscard are 64bit blklogwrites: pass to blk_loc_writes_co_log which is 64bit blkreplay, copy-on-read, filter-compress: pass to bdrv_co_pdiscard, OK copy-before-write: pass to bdrv_co_pdiscard which is 64bit and to cbw_do_copy_before_write which is 64bit file-posix: one handler calls raw_account_discard() is 64bit and both handlers calls raw_do_pdiscard(). Update raw_do_pdiscard, which pass to RawPosixAIOData::aio_nbytes, which is 64bit (and calls raw_account_discard()) gluster: somehow, third argument of glfs_discard_async is size_t. Let's set max_pdiscard accordingly. iscsi: iscsi_allocmap_set_invalid is 64bit, !is_byte_request_lun_aligned is 64bit. list.num is uint32_t. Let's clarify max_pdiscard and pdiscard_alignment. mirror_top: pass to bdrv_mirror_top_do_write() which is 64bit nbd: protocol limitation. max_pdiscard is alredy set strict enough, keep it as is for now. nvme: buf.nlb is uint32_t and we do shift. So, add corresponding limits to nvme_refresh_limits(). preallocate: pass to bdrv_co_pdiscard() which is 64bit. rbd: pass to qemu_rbd_start_co() which is 64bit. qcow2: calculations are still OK, thanks to bdrv_check_qiov_request(), qcow2_cluster_discard() is 64bit. raw-format: raw_adjust_offset() is 64bit, bdrv_co_pdiscard too. throttle: pass to bdrv_co_pdiscard() which is 64bit and to throttle_group_co_io_limits_intercept() which is 64bit as well. test-block-iothread: bytes argument is unused Great! Now all drivers are prepared to handle 64bit discard requests, or else have explicit max_pdiscard limits. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20210903102807.27127-11-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> |
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| .. | ||
| check-block-qdict.c | ||
| check-qdict.c | ||
| check-qjson.c | ||
| check-qlist.c | ||
| check-qlit.c | ||
| check-qnull.c | ||
| check-qnum.c | ||
| check-qobject.c | ||
| check-qom-interface.c | ||
| check-qom-proplist.c | ||
| check-qstring.c | ||
| crypto-tls-psk-helpers.c | ||
| crypto-tls-psk-helpers.h | ||
| crypto-tls-x509-helpers.c | ||
| crypto-tls-x509-helpers.h | ||
| io-channel-helpers.c | ||
| io-channel-helpers.h | ||
| iothread.c | ||
| iothread.h | ||
| meson.build | ||
| pkix_asn1_tab.c | ||
| ptimer-test-stubs.c | ||
| ptimer-test.c | ||
| ptimer-test.h | ||
| rcutorture.c | ||
| socket-helpers.c | ||
| socket-helpers.h | ||
| test-aio-multithread.c | ||
| test-aio.c | ||
| test-authz-list.c | ||
| test-authz-listfile.c | ||
| test-authz-pam.c | ||
| test-authz-simple.c | ||
| test-base64.c | ||
| test-bdrv-drain.c | ||
| test-bdrv-graph-mod.c | ||
| test-bitcnt.c | ||
| test-bitmap.c | ||
| test-bitops.c | ||
| test-block-backend.c | ||
| test-block-iothread.c | ||
| test-blockjob-txn.c | ||
| test-blockjob.c | ||
| test-bufferiszero.c | ||
| test-char.c | ||
| test-clone-visitor.c | ||
| test-coroutine.c | ||
| test-crypto-afsplit.c | ||
| test-crypto-block.c | ||
| test-crypto-cipher.c | ||
| test-crypto-hash.c | ||
| test-crypto-hmac.c | ||
| test-crypto-ivgen.c | ||
| test-crypto-pbkdf.c | ||
| test-crypto-secret.c | ||
| test-crypto-tlscredsx509.c | ||
| test-crypto-tlssession.c | ||
| test-crypto-xts.c | ||
| test-cutils.c | ||
| test-fdmon-epoll.c | ||
| test-forward-visitor.c | ||
| test-hbitmap.c | ||
| test-image-locking.c | ||
| test-int128.c | ||
| test-io-channel-buffer.c | ||
| test-io-channel-command.c | ||
| test-io-channel-file.c | ||
| test-io-channel-socket.c | ||
| test-io-channel-tls.c | ||
| test-io-task.c | ||
| test-iov.c | ||
| test-keyval.c | ||
| test-logging.c | ||
| test-mul64.c | ||
| test-opts-visitor.c | ||
| test-qapi-util.c | ||
| test-qdev-global-props.c | ||
| test-qdist.c | ||
| test-qemu-opts.c | ||
| test-qga.c | ||
| test-qgraph.c | ||
| test-qht.c | ||
| test-qmp-cmds.c | ||
| test-qmp-event.c | ||
| test-qobject-input-visitor.c | ||
| test-qobject-output-visitor.c | ||
| test-rcu-list.c | ||
| test-rcu-simpleq.c | ||
| test-rcu-slist.c | ||
| test-rcu-tailq.c | ||
| test-replication.c | ||
| test-shift128.c | ||
| test-string-input-visitor.c | ||
| test-string-output-visitor.c | ||
| test-thread-pool.c | ||
| test-throttle.c | ||
| test-timed-average.c | ||
| test-util-filemonitor.c | ||
| test-util-sockets.c | ||
| test-uuid.c | ||
| test-visitor-serialization.c | ||
| test-vmstate.c | ||
| test-write-threshold.c | ||
| test-x86-cpuid.c | ||
| test-xbzrle.c | ||
| test-yank.c | ||