ccee48aa73
Prepare to move the blk_io_plug_call() API out of the block layer so that other subsystems call use this deferred call mechanism. Rename it to defer_call() but leave the code in block/plug.c. The next commit will move the code out of the block layer. Suggested-by: Ilya Maximets <i.maximets@ovn.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Paul Durrant <paul@xen.org> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Message-ID: <20230913200045.1024233-2-stefanha@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
235 lines
11 KiB
C
235 lines
11 KiB
C
/*
|
|
* QEMU Block backends
|
|
*
|
|
* Copyright (C) 2014-2016 Red Hat, Inc.
|
|
*
|
|
* Authors:
|
|
* Markus Armbruster <armbru@redhat.com>,
|
|
*
|
|
* This work is licensed under the terms of the GNU LGPL, version 2.1
|
|
* or later. See the COPYING.LIB file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef BLOCK_BACKEND_IO_H
|
|
#define BLOCK_BACKEND_IO_H
|
|
|
|
#include "block-backend-common.h"
|
|
#include "block/accounting.h"
|
|
|
|
/*
|
|
* I/O API functions. These functions are thread-safe.
|
|
*
|
|
* See include/block/block-io.h for more information about
|
|
* the I/O API.
|
|
*/
|
|
|
|
const char *blk_name(const BlockBackend *blk);
|
|
|
|
BlockDriverState *blk_bs(BlockBackend *blk);
|
|
|
|
void blk_set_allow_write_beyond_eof(BlockBackend *blk, bool allow);
|
|
void blk_set_allow_aio_context_change(BlockBackend *blk, bool allow);
|
|
void blk_set_disable_request_queuing(BlockBackend *blk, bool disable);
|
|
bool blk_iostatus_is_enabled(const BlockBackend *blk);
|
|
|
|
char *blk_get_attached_dev_id(BlockBackend *blk);
|
|
|
|
BlockAIOCB *blk_aio_pwrite_zeroes(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, BdrvRequestFlags flags,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
|
|
BlockAIOCB *blk_aio_preadv(BlockBackend *blk, int64_t offset,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_pwritev(BlockBackend *blk, int64_t offset,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_flush(BlockBackend *blk,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_zone_report(BlockBackend *blk, int64_t offset,
|
|
unsigned int *nr_zones,
|
|
BlockZoneDescriptor *zones,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_zone_mgmt(BlockBackend *blk, BlockZoneOp op,
|
|
int64_t offset, int64_t len,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_zone_append(BlockBackend *blk, int64_t *offset,
|
|
QEMUIOVector *qiov, BdrvRequestFlags flags,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_aio_pdiscard(BlockBackend *blk, int64_t offset, int64_t bytes,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
void blk_aio_cancel_async(BlockAIOCB *acb);
|
|
BlockAIOCB *blk_aio_ioctl(BlockBackend *blk, unsigned long int req, void *buf,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
|
|
void blk_inc_in_flight(BlockBackend *blk);
|
|
void blk_dec_in_flight(BlockBackend *blk);
|
|
|
|
bool coroutine_fn GRAPH_RDLOCK blk_co_is_inserted(BlockBackend *blk);
|
|
bool co_wrapper_mixed_bdrv_rdlock blk_is_inserted(BlockBackend *blk);
|
|
|
|
bool coroutine_fn GRAPH_RDLOCK blk_co_is_available(BlockBackend *blk);
|
|
bool co_wrapper_mixed_bdrv_rdlock blk_is_available(BlockBackend *blk);
|
|
|
|
void coroutine_fn blk_co_lock_medium(BlockBackend *blk, bool locked);
|
|
void co_wrapper blk_lock_medium(BlockBackend *blk, bool locked);
|
|
|
|
void coroutine_fn blk_co_eject(BlockBackend *blk, bool eject_flag);
|
|
void co_wrapper blk_eject(BlockBackend *blk, bool eject_flag);
|
|
|
|
int64_t coroutine_fn blk_co_getlength(BlockBackend *blk);
|
|
int64_t co_wrapper_mixed blk_getlength(BlockBackend *blk);
|
|
|
|
void coroutine_fn blk_co_get_geometry(BlockBackend *blk,
|
|
uint64_t *nb_sectors_ptr);
|
|
void blk_get_geometry(BlockBackend *blk, uint64_t *nb_sectors_ptr);
|
|
|
|
int64_t coroutine_fn blk_co_nb_sectors(BlockBackend *blk);
|
|
int64_t blk_nb_sectors(BlockBackend *blk);
|
|
|
|
void *blk_try_blockalign(BlockBackend *blk, size_t size);
|
|
void *blk_blockalign(BlockBackend *blk, size_t size);
|
|
bool blk_is_writable(BlockBackend *blk);
|
|
bool blk_enable_write_cache(BlockBackend *blk);
|
|
BlockdevOnError blk_get_on_error(BlockBackend *blk, bool is_read);
|
|
BlockErrorAction blk_get_error_action(BlockBackend *blk, bool is_read,
|
|
int error);
|
|
void blk_error_action(BlockBackend *blk, BlockErrorAction action,
|
|
bool is_read, int error);
|
|
void blk_iostatus_set_err(BlockBackend *blk, int error);
|
|
int blk_get_max_iov(BlockBackend *blk);
|
|
int blk_get_max_hw_iov(BlockBackend *blk);
|
|
|
|
void defer_call_begin(void);
|
|
void defer_call_end(void);
|
|
void defer_call(void (*fn)(void *), void *opaque);
|
|
|
|
AioContext *blk_get_aio_context(BlockBackend *blk);
|
|
BlockAcctStats *blk_get_stats(BlockBackend *blk);
|
|
void *blk_aio_get(const AIOCBInfo *aiocb_info, BlockBackend *blk,
|
|
BlockCompletionFunc *cb, void *opaque);
|
|
BlockAIOCB *blk_abort_aio_request(BlockBackend *blk,
|
|
BlockCompletionFunc *cb,
|
|
void *opaque, int ret);
|
|
|
|
uint32_t blk_get_request_alignment(BlockBackend *blk);
|
|
uint32_t blk_get_max_transfer(BlockBackend *blk);
|
|
uint64_t blk_get_max_hw_transfer(BlockBackend *blk);
|
|
|
|
int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,
|
|
BlockBackend *blk_out, int64_t off_out,
|
|
int64_t bytes, BdrvRequestFlags read_flags,
|
|
BdrvRequestFlags write_flags);
|
|
|
|
int coroutine_fn blk_co_block_status_above(BlockBackend *blk,
|
|
BlockDriverState *base,
|
|
int64_t offset, int64_t bytes,
|
|
int64_t *pnum, int64_t *map,
|
|
BlockDriverState **file);
|
|
int coroutine_fn blk_co_is_allocated_above(BlockBackend *blk,
|
|
BlockDriverState *base,
|
|
bool include_base, int64_t offset,
|
|
int64_t bytes, int64_t *pnum);
|
|
|
|
/*
|
|
* "I/O or GS" API functions. These functions can run without
|
|
* the BQL, but only in one specific iothread/main loop.
|
|
*
|
|
* See include/block/block-io.h for more information about
|
|
* the "I/O or GS" API.
|
|
*/
|
|
|
|
int co_wrapper_mixed blk_pread(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, void *buf,
|
|
BdrvRequestFlags flags);
|
|
int coroutine_fn blk_co_pread(BlockBackend *blk, int64_t offset, int64_t bytes,
|
|
void *buf, BdrvRequestFlags flags);
|
|
|
|
int co_wrapper_mixed blk_preadv(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
BdrvRequestFlags flags);
|
|
int coroutine_fn blk_co_preadv(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
BdrvRequestFlags flags);
|
|
|
|
int co_wrapper_mixed blk_preadv_part(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
size_t qiov_offset,
|
|
BdrvRequestFlags flags);
|
|
int coroutine_fn blk_co_preadv_part(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
size_t qiov_offset, BdrvRequestFlags flags);
|
|
|
|
int co_wrapper_mixed blk_pwrite(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, const void *buf,
|
|
BdrvRequestFlags flags);
|
|
int coroutine_fn blk_co_pwrite(BlockBackend *blk, int64_t offset, int64_t bytes,
|
|
const void *buf, BdrvRequestFlags flags);
|
|
|
|
int co_wrapper_mixed blk_pwritev(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
BdrvRequestFlags flags);
|
|
int coroutine_fn blk_co_pwritev(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
BdrvRequestFlags flags);
|
|
|
|
int co_wrapper_mixed blk_pwritev_part(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, QEMUIOVector *qiov,
|
|
size_t qiov_offset,
|
|
BdrvRequestFlags flags);
|
|
int coroutine_fn blk_co_pwritev_part(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes,
|
|
QEMUIOVector *qiov, size_t qiov_offset,
|
|
BdrvRequestFlags flags);
|
|
|
|
int co_wrapper_mixed blk_pwrite_compressed(BlockBackend *blk,
|
|
int64_t offset, int64_t bytes,
|
|
const void *buf);
|
|
int coroutine_fn blk_co_pwrite_compressed(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, const void *buf);
|
|
|
|
int co_wrapper_mixed blk_pwrite_zeroes(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes,
|
|
BdrvRequestFlags flags);
|
|
int coroutine_fn blk_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes, BdrvRequestFlags flags);
|
|
|
|
int coroutine_fn blk_co_zone_report(BlockBackend *blk, int64_t offset,
|
|
unsigned int *nr_zones,
|
|
BlockZoneDescriptor *zones);
|
|
int co_wrapper_mixed blk_zone_report(BlockBackend *blk, int64_t offset,
|
|
unsigned int *nr_zones,
|
|
BlockZoneDescriptor *zones);
|
|
int coroutine_fn blk_co_zone_mgmt(BlockBackend *blk, BlockZoneOp op,
|
|
int64_t offset, int64_t len);
|
|
int co_wrapper_mixed blk_zone_mgmt(BlockBackend *blk, BlockZoneOp op,
|
|
int64_t offset, int64_t len);
|
|
int coroutine_fn blk_co_zone_append(BlockBackend *blk, int64_t *offset,
|
|
QEMUIOVector *qiov,
|
|
BdrvRequestFlags flags);
|
|
int co_wrapper_mixed blk_zone_append(BlockBackend *blk, int64_t *offset,
|
|
QEMUIOVector *qiov,
|
|
BdrvRequestFlags flags);
|
|
|
|
int co_wrapper_mixed blk_pdiscard(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes);
|
|
int coroutine_fn blk_co_pdiscard(BlockBackend *blk, int64_t offset,
|
|
int64_t bytes);
|
|
|
|
int co_wrapper_mixed blk_flush(BlockBackend *blk);
|
|
int coroutine_fn blk_co_flush(BlockBackend *blk);
|
|
|
|
int co_wrapper_mixed blk_ioctl(BlockBackend *blk, unsigned long int req,
|
|
void *buf);
|
|
int coroutine_fn blk_co_ioctl(BlockBackend *blk, unsigned long int req,
|
|
void *buf);
|
|
|
|
int co_wrapper_mixed blk_truncate(BlockBackend *blk, int64_t offset,
|
|
bool exact, PreallocMode prealloc,
|
|
BdrvRequestFlags flags, Error **errp);
|
|
int coroutine_fn blk_co_truncate(BlockBackend *blk, int64_t offset, bool exact,
|
|
PreallocMode prealloc, BdrvRequestFlags flags,
|
|
Error **errp);
|
|
|
|
#endif /* BLOCK_BACKEND_IO_H */
|