qemu/block/meson.build
Stefan Hajnoczi 41abca8c39 block: add blk_io_plug_call() API
Introduce a new API for thread-local blk_io_plug() that does not
traverse the block graph. The goal is to make blk_io_plug() multi-queue
friendly.

Instead of having block drivers track whether or not we're in a plugged
section, provide an API that allows them to defer a function call until
we're unplugged: blk_io_plug_call(fn, opaque). If blk_io_plug_call() is
called multiple times with the same fn/opaque pair, then fn() is only
called once at the end of the function - resulting in batching.

This patch introduces the API and changes blk_io_plug()/blk_io_unplug().
blk_io_plug()/blk_io_unplug() no longer require a BlockBackend argument
because the plug state is now thread-local.

Later patches convert block drivers to blk_io_plug_call() and then we
can finally remove .bdrv_co_io_plug() once all block drivers have been
converted.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Message-id: 20230530180959.1108766-2-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-06-01 07:34:03 -04:00

168 lines
4.5 KiB
Meson

block_ss.add(genh)
block_ss.add(files(
'accounting.c',
'aio_task.c',
'amend.c',
'backup.c',
'copy-before-write.c',
'blkdebug.c',
'blklogwrites.c',
'blkverify.c',
'block-backend.c',
'block-copy.c',
'graph-lock.c',
'commit.c',
'copy-on-read.c',
'preallocate.c',
'progress_meter.c',
'create.c',
'crypto.c',
'dirty-bitmap.c',
'filter-compress.c',
'io.c',
'mirror.c',
'nbd.c',
'null.c',
'plug.c',
'qapi.c',
'qcow2-bitmap.c',
'qcow2-cache.c',
'qcow2-cluster.c',
'qcow2-refcount.c',
'qcow2-snapshot.c',
'qcow2-threads.c',
'qcow2.c',
'quorum.c',
'raw-format.c',
'reqlist.c',
'snapshot.c',
'snapshot-access.c',
'throttle-groups.c',
'throttle.c',
'write-threshold.c',
), zstd, zlib, gnutls)
softmmu_ss.add(when: 'CONFIG_TCG', if_true: files('blkreplay.c'))
softmmu_ss.add(files('block-ram-registrar.c'))
if get_option('qcow1').allowed()
block_ss.add(files('qcow.c'))
endif
if get_option('vdi').allowed()
block_ss.add(files('vdi.c'))
endif
if get_option('vhdx').allowed()
block_ss.add(files(
'vhdx-endian.c',
'vhdx-log.c',
'vhdx.c'
))
endif
if get_option('vmdk').allowed()
block_ss.add(files('vmdk.c'))
endif
if get_option('vpc').allowed()
block_ss.add(files('vpc.c'))
endif
if get_option('cloop').allowed()
block_ss.add(files('cloop.c'))
endif
if get_option('bochs').allowed()
block_ss.add(files('bochs.c'))
endif
if get_option('vvfat').allowed()
block_ss.add(files('vvfat.c'))
endif
if get_option('dmg').allowed()
block_ss.add(files('dmg.c'))
endif
if get_option('qed').allowed()
block_ss.add(files(
'qed-check.c',
'qed-cluster.c',
'qed-l2-cache.c',
'qed-table.c',
'qed.c',
))
endif
if get_option('parallels').allowed()
block_ss.add(files('parallels.c', 'parallels-ext.c'))
endif
block_ss.add(when: 'CONFIG_WIN32', if_true: files('file-win32.c', 'win32-aio.c'))
block_ss.add(when: 'CONFIG_POSIX', if_true: [files('file-posix.c'), coref, iokit])
block_ss.add(when: libiscsi, if_true: files('iscsi-opts.c'))
block_ss.add(when: 'CONFIG_LINUX', if_true: files('nvme.c'))
if get_option('replication').allowed()
block_ss.add(files('replication.c'))
endif
block_ss.add(when: libaio, if_true: files('linux-aio.c'))
block_ss.add(when: linux_io_uring, if_true: files('io_uring.c'))
block_modules = {}
modsrc = []
foreach m : [
[blkio, 'blkio', files('blkio.c')],
[curl, 'curl', files('curl.c')],
[glusterfs, 'gluster', files('gluster.c')],
[libiscsi, 'iscsi', [files('iscsi.c'), libm]],
[libnfs, 'nfs', files('nfs.c')],
[libssh, 'ssh', files('ssh.c')],
[rbd, 'rbd', files('rbd.c')],
]
if m[0].found()
module_ss = ss.source_set()
module_ss.add(when: m[0], if_true: m[2])
if enable_modules
modsrc += module_ss.all_sources()
endif
block_modules += {m[1] : module_ss}
endif
endforeach
# those are not exactly regular block modules, so treat them apart
if get_option('dmg').allowed()
foreach m : [
[liblzfse, 'dmg-lzfse', liblzfse, 'dmg-lzfse.c'],
[libbzip2, 'dmg-bz2', [glib, libbzip2], 'dmg-bz2.c']
]
if m[0].found()
module_ss = ss.source_set()
module_ss.add(when: m[2], if_true: files(m[3]))
block_modules += {m[1] : module_ss}
endif
endforeach
endif
module_block_py = find_program('../scripts/modules/module_block.py')
module_block_h = custom_target('module_block.h',
output: 'module_block.h',
input: modsrc,
command: [module_block_py, '@OUTPUT0@', modsrc])
block_ss.add(module_block_h)
wrapper_py = find_program('../scripts/block-coroutine-wrapper.py')
block_gen_c = custom_target('block-gen.c',
output: 'block-gen.c',
input: files(
'../include/block/block-io.h',
'../include/block/dirty-bitmap.h',
'../include/block/block_int-io.h',
'../include/block/block-global-state.h',
'../include/sysemu/block-backend-global-state.h',
'../include/sysemu/block-backend-io.h',
'coroutines.h'
),
command: [wrapper_py, '@OUTPUT@', '@INPUT@'])
block_ss.add(block_gen_c)
block_ss.add(files('stream.c'))
softmmu_ss.add(files('qapi-sysemu.c'))
subdir('export')
subdir('monitor')
modules += {'block': block_modules}