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Szmigiero" , =?utf-8?q?Philippe_Mat?= =?utf-8?q?hieu-Daud=C3=A9?= Subject: [PATCH v5 05/18] migration/multifd: Introduce MultiFDSendData Date: Mon, 26 Aug 2024 16:53:09 -0300 Message-Id: <20240826195322.16532-6-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240826195322.16532-1-farosas@suse.de> References: <20240826195322.16532-1-farosas@suse.de> MIME-Version: 1.0 X-Rspamd-Queue-Id: B3D0521ACC X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:email,suse.de:dkim,suse.de:mid,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_COUNT_TWO(0.00)[2]; DWL_DNSWL_BLOCKED(0.00)[suse.de:dkim]; RCPT_COUNT_THREE(0.00)[4]; DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Action: no action Received-SPF: pass client-ip=195.135.223.130; envelope-from=farosas@suse.de; helo=smtp-out1.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Add a new data structure to replace p->pages in the multifd channel. This new structure will hide the multifd payload type behind an union, so we don't need to add a new field to the channel each time we want to handle a different data type. This also allow us to keep multifd_send_pages() as is, without needing to complicate the pointer switching. Reviewed-by: Peter Xu Signed-off-by: Fabiano Rosas --- migration/multifd.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/migration/multifd.h b/migration/multifd.h index 660a9882c2..7bb4a2cbc4 100644 --- a/migration/multifd.h +++ b/migration/multifd.h @@ -17,6 +17,7 @@ #include "ram.h" typedef struct MultiFDRecvData MultiFDRecvData; +typedef struct MultiFDSendData MultiFDSendData; bool multifd_send_setup(void); void multifd_send_shutdown(void); @@ -88,6 +89,31 @@ struct MultiFDRecvData { off_t file_offset; }; +typedef enum { + MULTIFD_PAYLOAD_NONE, + MULTIFD_PAYLOAD_RAM, +} MultiFDPayloadType; + +typedef union MultiFDPayload { + MultiFDPages_t ram; +} MultiFDPayload; + +struct MultiFDSendData { + MultiFDPayloadType type; + MultiFDPayload u; +}; + +static inline bool multifd_payload_empty(MultiFDSendData *data) +{ + return data->type == MULTIFD_PAYLOAD_NONE; +} + +static inline void multifd_set_payload_type(MultiFDSendData *data, + MultiFDPayloadType type) +{ + data->type = type; +} + typedef struct { /* Fields are only written at creating/deletion time */ /* No lock required for them, they are read only */