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a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1706307590; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=SLj0d2ggXJhET2C/cGBlDaztn6eBWzQ6qnAVThFbbgU=; b=cwSelqHCuyasE+bx7Z3ZqTuzAdARlxcdAdw0Nln+fPI8Zc5/c1+Rg5O8AId6mozz63pBF6 noN87pzkDZr8DpBQ== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: Peter Xu , Hao Xiang , Yuan Liu , Bryan Zhang Subject: [PATCH 1/5] migration/multifd: Separate compression ops from non-compression Date: Fri, 26 Jan 2024 19:19:39 -0300 Message-Id: <20240126221943.26628-2-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240126221943.26628-1-farosas@suse.de> References: <20240126221943.26628-1-farosas@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Authentication-Results: smtp-out1.suse.de; none X-Spam-Score: 0.70 X-Spamd-Result: default: False [0.70 / 50.00]; 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charset="utf-8" For multifd we currently choose exclusively between migration using compression or migration without compression. The compression method is chosen via the multifd_compression parameter (none, zlib, zstd). We've been using the 'none' value to mean the regular socket migration. Rename the 'multifd_ops' array to 'multifd_compression_ops' and move the 'nocomp_multifd_ops' out of it. We don't need to have the non-compression methods in an array because they are not registered dynamically and cannot be compiled out like the compression code. Rename the 'nocomp' functions to 'multifd_socket' and remove the comments which are useless IMHO. Next patch moves the functions into a socket specific file. Signed-off-by: Fabiano Rosas --- migration/multifd-zlib.c | 2 +- migration/multifd-zstd.c | 2 +- migration/multifd.c | 109 +++++++++++---------------------------- migration/multifd.h | 3 +- 4 files changed, 34 insertions(+), 82 deletions(-) diff --git a/migration/multifd-zlib.c b/migration/multifd-zlib.c index 37ce48621e..d89163e975 100644 --- a/migration/multifd-zlib.c +++ b/migration/multifd-zlib.c @@ -319,7 +319,7 @@ static MultiFDMethods multifd_zlib_ops =3D { =20 static void multifd_zlib_register(void) { - multifd_register_ops(MULTIFD_COMPRESSION_ZLIB, &multifd_zlib_ops); + multifd_register_compression(MULTIFD_COMPRESSION_ZLIB, &multifd_zlib_o= ps); } =20 migration_init(multifd_zlib_register); diff --git a/migration/multifd-zstd.c b/migration/multifd-zstd.c index b471daadcd..a90788540e 100644 --- a/migration/multifd-zstd.c +++ b/migration/multifd-zstd.c @@ -310,7 +310,7 @@ static MultiFDMethods multifd_zstd_ops =3D { =20 static void multifd_zstd_register(void) { - multifd_register_ops(MULTIFD_COMPRESSION_ZSTD, &multifd_zstd_ops); + multifd_register_compression(MULTIFD_COMPRESSION_ZSTD, &multifd_zstd_o= ps); } =20 migration_init(multifd_zstd_register); diff --git a/migration/multifd.c b/migration/multifd.c index 25cbc6dc6b..2968649500 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -45,48 +45,17 @@ typedef struct { uint64_t unused2[4]; /* Reserved for future use */ } __attribute__((packed)) MultiFDInit_t; =20 -/* Multifd without compression */ - -/** - * nocomp_send_setup: setup send side - * - * For no compression this function does nothing. - * - * Returns 0 for success or -1 for error - * - * @p: Params for the channel that we are using - * @errp: pointer to an error - */ -static int nocomp_send_setup(MultiFDSendParams *p, Error **errp) +static int multifd_socket_send_setup(MultiFDSendParams *p, Error **errp) { return 0; } =20 -/** - * nocomp_send_cleanup: cleanup send side - * - * For no compression this function does nothing. - * - * @p: Params for the channel that we are using - * @errp: pointer to an error - */ -static void nocomp_send_cleanup(MultiFDSendParams *p, Error **errp) +static void multifd_socket_send_cleanup(MultiFDSendParams *p, Error **errp) { return; } =20 -/** - * nocomp_send_prepare: prepare date to be able to send - * - * For no compression we just have to calculate the size of the - * packet. - * - * Returns 0 for success or -1 for error - * - * @p: Params for the channel that we are using - * @errp: pointer to an error - */ -static int nocomp_send_prepare(MultiFDSendParams *p, Error **errp) +static int multifd_socket_send_prepare(MultiFDSendParams *p, Error **errp) { MultiFDPages_t *pages =3D p->pages; =20 @@ -101,43 +70,16 @@ static int nocomp_send_prepare(MultiFDSendParams *p, E= rror **errp) return 0; } =20 -/** - * nocomp_recv_setup: setup receive side - * - * For no compression this function does nothing. - * - * Returns 0 for success or -1 for error - * - * @p: Params for the channel that we are using - * @errp: pointer to an error - */ -static int nocomp_recv_setup(MultiFDRecvParams *p, Error **errp) +static int multifd_socket_recv_setup(MultiFDRecvParams *p, Error **errp) { return 0; } =20 -/** - * nocomp_recv_cleanup: setup receive side - * - * For no compression this function does nothing. - * - * @p: Params for the channel that we are using - */ -static void nocomp_recv_cleanup(MultiFDRecvParams *p) +static void multifd_socket_recv_cleanup(MultiFDRecvParams *p) { } =20 -/** - * nocomp_recv_pages: read the data from the channel into actual pages - * - * For no compression we just need to read things into the correct place. - * - * Returns 0 for success or -1 for error - * - * @p: Params for the channel that we are using - * @errp: pointer to an error - */ -static int nocomp_recv_pages(MultiFDRecvParams *p, Error **errp) +static int multifd_socket_recv_pages(MultiFDRecvParams *p, Error **errp) { uint32_t flags =3D p->flags & MULTIFD_FLAG_COMPRESSION_MASK; =20 @@ -153,23 +95,34 @@ static int nocomp_recv_pages(MultiFDRecvParams *p, Err= or **errp) return qio_channel_readv_all(p->c, p->iov, p->normal_num, errp); } =20 -static MultiFDMethods multifd_nocomp_ops =3D { - .send_setup =3D nocomp_send_setup, - .send_cleanup =3D nocomp_send_cleanup, - .send_prepare =3D nocomp_send_prepare, - .recv_setup =3D nocomp_recv_setup, - .recv_cleanup =3D nocomp_recv_cleanup, - .recv_pages =3D nocomp_recv_pages +static MultiFDMethods multifd_socket_ops =3D { + .send_setup =3D multifd_socket_send_setup, + .send_cleanup =3D multifd_socket_send_cleanup, + .send_prepare =3D multifd_socket_send_prepare, + .recv_setup =3D multifd_socket_recv_setup, + .recv_cleanup =3D multifd_socket_recv_cleanup, + .recv_pages =3D multifd_socket_recv_pages }; =20 -static MultiFDMethods *multifd_ops[MULTIFD_COMPRESSION__MAX] =3D { - [MULTIFD_COMPRESSION_NONE] =3D &multifd_nocomp_ops, -}; +static MultiFDMethods *multifd_compression_ops[MULTIFD_COMPRESSION__MAX] = =3D {0}; + +static MultiFDMethods *multifd_get_ops(void) +{ + MultiFDCompression comp =3D migrate_multifd_compression(); + + assert(comp < MULTIFD_COMPRESSION__MAX); + + if (comp !=3D MULTIFD_COMPRESSION_NONE) { + return multifd_compression_ops[comp]; + } + + return &multifd_socket_ops; +} =20 -void multifd_register_ops(int method, MultiFDMethods *ops) +void multifd_register_compression(int method, MultiFDMethods *ops) { assert(0 < method && method < MULTIFD_COMPRESSION__MAX); - multifd_ops[method] =3D ops; + multifd_compression_ops[method] =3D ops; } =20 static int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp) @@ -915,7 +868,7 @@ int multifd_save_setup(Error **errp) multifd_send_state->pages =3D multifd_pages_init(page_count); qemu_sem_init(&multifd_send_state->channels_ready, 0); qatomic_set(&multifd_send_state->exiting, 0); - multifd_send_state->ops =3D multifd_ops[migrate_multifd_compression()]; + multifd_send_state->ops =3D multifd_get_ops(); =20 for (i =3D 0; i < thread_count; i++) { MultiFDSendParams *p =3D &multifd_send_state->params[i]; @@ -1171,7 +1124,7 @@ int multifd_load_setup(Error **errp) multifd_recv_state->params =3D g_new0(MultiFDRecvParams, thread_count); qatomic_set(&multifd_recv_state->count, 0); qemu_sem_init(&multifd_recv_state->sem_sync, 0); - multifd_recv_state->ops =3D multifd_ops[migrate_multifd_compression()]; + multifd_recv_state->ops =3D multifd_get_ops(); =20 for (i =3D 0; i < thread_count; i++) { MultiFDRecvParams *p =3D &multifd_recv_state->params[i]; diff --git a/migration/multifd.h b/migration/multifd.h index 35d11f103c..4630baccd4 100644 --- a/migration/multifd.h +++ b/migration/multifd.h @@ -204,7 +204,6 @@ typedef struct { int (*recv_pages)(MultiFDRecvParams *p, Error **errp); } MultiFDMethods; =20 -void multifd_register_ops(int method, MultiFDMethods *ops); +void multifd_register_compression(int method, MultiFDMethods *ops); =20 #endif - --=20 2.35.3