mirror of
https://github.com/xemu-project/xemu.git
synced 2024-12-05 10:16:50 +00:00
2ce3bf1aa9
Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Laurent Vivier <lvivier@redhat.com>
178 lines
6.4 KiB
C
178 lines
6.4 KiB
C
/*
|
|
* QEMU System Emulator
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef MIGRATION_QEMU_FILE_H
|
|
#define MIGRATION_QEMU_FILE_H
|
|
|
|
/* Read a chunk of data from a file at the given position. The pos argument
|
|
* can be ignored if the file is only be used for streaming. The number of
|
|
* bytes actually read should be returned.
|
|
*/
|
|
typedef ssize_t (QEMUFileGetBufferFunc)(void *opaque, uint8_t *buf,
|
|
int64_t pos, size_t size);
|
|
|
|
/* Close a file
|
|
*
|
|
* Return negative error number on error, 0 or positive value on success.
|
|
*
|
|
* The meaning of return value on success depends on the specific back-end being
|
|
* used.
|
|
*/
|
|
typedef int (QEMUFileCloseFunc)(void *opaque);
|
|
|
|
/* Called to return the OS file descriptor associated to the QEMUFile.
|
|
*/
|
|
typedef int (QEMUFileGetFD)(void *opaque);
|
|
|
|
/* Called to change the blocking mode of the file
|
|
*/
|
|
typedef int (QEMUFileSetBlocking)(void *opaque, bool enabled);
|
|
|
|
/*
|
|
* This function writes an iovec to file. The handler must write all
|
|
* of the data or return a negative errno value.
|
|
*/
|
|
typedef ssize_t (QEMUFileWritevBufferFunc)(void *opaque, struct iovec *iov,
|
|
int iovcnt, int64_t pos);
|
|
|
|
/*
|
|
* This function provides hooks around different
|
|
* stages of RAM migration.
|
|
* 'opaque' is the backend specific data in QEMUFile
|
|
* 'data' is call specific data associated with the 'flags' value
|
|
*/
|
|
typedef int (QEMURamHookFunc)(QEMUFile *f, void *opaque, uint64_t flags,
|
|
void *data);
|
|
|
|
/*
|
|
* Constants used by ram_control_* hooks
|
|
*/
|
|
#define RAM_CONTROL_SETUP 0
|
|
#define RAM_CONTROL_ROUND 1
|
|
#define RAM_CONTROL_HOOK 2
|
|
#define RAM_CONTROL_FINISH 3
|
|
#define RAM_CONTROL_BLOCK_REG 4
|
|
|
|
/*
|
|
* This function allows override of where the RAM page
|
|
* is saved (such as RDMA, for example.)
|
|
*/
|
|
typedef size_t (QEMURamSaveFunc)(QEMUFile *f, void *opaque,
|
|
ram_addr_t block_offset,
|
|
ram_addr_t offset,
|
|
size_t size,
|
|
uint64_t *bytes_sent);
|
|
|
|
/*
|
|
* Return a QEMUFile for comms in the opposite direction
|
|
*/
|
|
typedef QEMUFile *(QEMURetPathFunc)(void *opaque);
|
|
|
|
/*
|
|
* Stop any read or write (depending on flags) on the underlying
|
|
* transport on the QEMUFile.
|
|
* Existing blocking reads/writes must be woken
|
|
* Returns 0 on success, -err on error
|
|
*/
|
|
typedef int (QEMUFileShutdownFunc)(void *opaque, bool rd, bool wr);
|
|
|
|
typedef struct QEMUFileOps {
|
|
QEMUFileGetBufferFunc *get_buffer;
|
|
QEMUFileCloseFunc *close;
|
|
QEMUFileSetBlocking *set_blocking;
|
|
QEMUFileWritevBufferFunc *writev_buffer;
|
|
QEMURetPathFunc *get_return_path;
|
|
QEMUFileShutdownFunc *shut_down;
|
|
} QEMUFileOps;
|
|
|
|
typedef struct QEMUFileHooks {
|
|
QEMURamHookFunc *before_ram_iterate;
|
|
QEMURamHookFunc *after_ram_iterate;
|
|
QEMURamHookFunc *hook_ram_load;
|
|
QEMURamSaveFunc *save_page;
|
|
} QEMUFileHooks;
|
|
|
|
QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops);
|
|
void qemu_file_set_hooks(QEMUFile *f, const QEMUFileHooks *hooks);
|
|
int qemu_get_fd(QEMUFile *f);
|
|
int qemu_fclose(QEMUFile *f);
|
|
int64_t qemu_ftell(QEMUFile *f);
|
|
int64_t qemu_ftell_fast(QEMUFile *f);
|
|
/*
|
|
* put_buffer without copying the buffer.
|
|
* The buffer should be available till it is sent asynchronously.
|
|
*/
|
|
void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, size_t size,
|
|
bool may_free);
|
|
bool qemu_file_mode_is_not_valid(const char *mode);
|
|
bool qemu_file_is_writable(QEMUFile *f);
|
|
|
|
#include "migration/qemu-file-types.h"
|
|
|
|
size_t qemu_peek_buffer(QEMUFile *f, uint8_t **buf, size_t size, size_t offset);
|
|
size_t qemu_get_buffer_in_place(QEMUFile *f, uint8_t **buf, size_t size);
|
|
ssize_t qemu_put_compression_data(QEMUFile *f, const uint8_t *p, size_t size,
|
|
int level);
|
|
int qemu_put_qemu_file(QEMUFile *f_des, QEMUFile *f_src);
|
|
|
|
/*
|
|
* Note that you can only peek continuous bytes from where the current pointer
|
|
* is; you aren't guaranteed to be able to peak to +n bytes unless you've
|
|
* previously peeked +n-1.
|
|
*/
|
|
int qemu_peek_byte(QEMUFile *f, int offset);
|
|
void qemu_file_skip(QEMUFile *f, int size);
|
|
void qemu_update_position(QEMUFile *f, size_t size);
|
|
void qemu_file_reset_rate_limit(QEMUFile *f);
|
|
void qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate);
|
|
int64_t qemu_file_get_rate_limit(QEMUFile *f);
|
|
int qemu_file_get_error(QEMUFile *f);
|
|
void qemu_file_set_error(QEMUFile *f, int ret);
|
|
int qemu_file_shutdown(QEMUFile *f);
|
|
QEMUFile *qemu_file_get_return_path(QEMUFile *f);
|
|
void qemu_fflush(QEMUFile *f);
|
|
void qemu_file_set_blocking(QEMUFile *f, bool block);
|
|
|
|
size_t qemu_get_counted_string(QEMUFile *f, char buf[256]);
|
|
|
|
void ram_control_before_iterate(QEMUFile *f, uint64_t flags);
|
|
void ram_control_after_iterate(QEMUFile *f, uint64_t flags);
|
|
void ram_control_load_hook(QEMUFile *f, uint64_t flags, void *data);
|
|
|
|
/* Whenever this is found in the data stream, the flags
|
|
* will be passed to ram_control_load_hook in the incoming-migration
|
|
* side. This lets before_ram_iterate/after_ram_iterate add
|
|
* transport-specific sections to the RAM migration data.
|
|
*/
|
|
#define RAM_SAVE_FLAG_HOOK 0x80
|
|
|
|
#define RAM_SAVE_CONTROL_NOT_SUPP -1000
|
|
#define RAM_SAVE_CONTROL_DELAYED -2000
|
|
|
|
size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset,
|
|
ram_addr_t offset, size_t size,
|
|
uint64_t *bytes_sent);
|
|
|
|
#endif
|