Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
140 lines
3.9 KiB
C
140 lines
3.9 KiB
C
/*
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* Multifd common functions
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*
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* Copyright (c) 2019-2020 Red Hat Inc
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*
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* Authors:
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* Juan Quintela <quintela@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef QEMU_MIGRATION_MULTIFD_H
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#define QEMU_MIGRATION_MULTIFD_H
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int multifd_save_setup(Error **errp);
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void multifd_save_cleanup(void);
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int multifd_load_setup(Error **errp);
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int multifd_load_cleanup(Error **errp);
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bool multifd_recv_all_channels_created(void);
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bool multifd_recv_new_channel(QIOChannel *ioc, Error **errp);
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void multifd_recv_sync_main(void);
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void multifd_send_sync_main(QEMUFile *f);
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int multifd_queue_page(QEMUFile *f, RAMBlock *block, ram_addr_t offset);
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#define MULTIFD_FLAG_SYNC (1 << 0)
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/* This value needs to be a multiple of qemu_target_page_size() */
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#define MULTIFD_PACKET_SIZE (512 * 1024)
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typedef struct {
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uint32_t magic;
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uint32_t version;
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uint32_t flags;
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/* maximum number of allocated pages */
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uint32_t pages_alloc;
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uint32_t pages_used;
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/* size of the next packet that contains pages */
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uint32_t next_packet_size;
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uint64_t packet_num;
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uint64_t unused[4]; /* Reserved for future use */
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char ramblock[256];
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uint64_t offset[];
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} __attribute__((packed)) MultiFDPacket_t;
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typedef struct {
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/* number of used pages */
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uint32_t used;
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/* number of allocated pages */
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uint32_t allocated;
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/* global number of generated multifd packets */
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uint64_t packet_num;
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/* offset of each page */
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ram_addr_t *offset;
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/* pointer to each page */
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struct iovec *iov;
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RAMBlock *block;
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} MultiFDPages_t;
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typedef struct {
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/* this fields are not changed once the thread is created */
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/* channel number */
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uint8_t id;
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/* channel thread name */
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char *name;
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/* channel thread id */
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QemuThread thread;
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/* communication channel */
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QIOChannel *c;
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/* sem where to wait for more work */
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QemuSemaphore sem;
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/* this mutex protects the following parameters */
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QemuMutex mutex;
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/* is this channel thread running */
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bool running;
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/* should this thread finish */
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bool quit;
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/* thread has work to do */
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int pending_job;
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/* array of pages to sent */
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MultiFDPages_t *pages;
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/* packet allocated len */
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uint32_t packet_len;
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/* pointer to the packet */
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MultiFDPacket_t *packet;
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/* multifd flags for each packet */
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uint32_t flags;
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/* size of the next packet that contains pages */
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uint32_t next_packet_size;
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/* global number of generated multifd packets */
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uint64_t packet_num;
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/* thread local variables */
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/* packets sent through this channel */
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uint64_t num_packets;
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/* pages sent through this channel */
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uint64_t num_pages;
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/* syncs main thread and channels */
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QemuSemaphore sem_sync;
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} MultiFDSendParams;
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typedef struct {
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/* this fields are not changed once the thread is created */
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/* channel number */
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uint8_t id;
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/* channel thread name */
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char *name;
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/* channel thread id */
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QemuThread thread;
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/* communication channel */
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QIOChannel *c;
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/* this mutex protects the following parameters */
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QemuMutex mutex;
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/* is this channel thread running */
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bool running;
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/* should this thread finish */
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bool quit;
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/* array of pages to receive */
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MultiFDPages_t *pages;
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/* packet allocated len */
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uint32_t packet_len;
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/* pointer to the packet */
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MultiFDPacket_t *packet;
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/* multifd flags for each packet */
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uint32_t flags;
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/* global number of generated multifd packets */
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uint64_t packet_num;
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/* thread local variables */
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/* size of the next packet that contains pages */
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uint32_t next_packet_size;
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/* packets sent through this channel */
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uint64_t num_packets;
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/* pages sent through this channel */
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uint64_t num_pages;
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/* syncs main thread and channels */
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QemuSemaphore sem_sync;
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} MultiFDRecvParams;
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#endif
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