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bh=oI3Tb8uWM2nLjUJUHNjIXziUNX7jkPt9f9rYzwY+NgM=; b=Kf9rABt1RmOqiXJuM9JAUEKzIkPceTbNN8NHreqOBrqo1qHaKczAQAU6S6BH1hryE1Xc2K k9k6/SFObBPV+5jHahpR3dd0McVjaZedsF1rujaPMVIdzsLebeNfjAoM8fynRuSa6hq461 BBp30HJa9fJzXtFnGxaujLH/2YRgKPk= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1709133730; 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=oI3Tb8uWM2nLjUJUHNjIXziUNX7jkPt9f9rYzwY+NgM=; b=lhoAQRTufmaVzzNuI7m/eQlRhTPuww43oPxXDWJ+VeKGjswUH4UiXtJeDOrspEPqSHvKqE +6egwk4523w4p0BA== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: berrange@redhat.com, armbru@redhat.com, Peter Xu , Claudio Fontana Subject: [PATCH v5 17/23] migration/multifd: Add outgoing QIOChannelFile support Date: Wed, 28 Feb 2024 12:21:21 -0300 Message-Id: <20240228152127.18769-18-farosas@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20240228152127.18769-1-farosas@suse.de> References: <20240228152127.18769-1-farosas@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Spamd-Bar: / Authentication-Results: smtp-out1.suse.de; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a07:de40:b251:101:10:150:64:1; 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @suse.de) X-ZM-MESSAGEID: 1709133911304100003 Content-Type: text/plain; charset="utf-8" Allow multifd to open file-backed channels. This will be used when enabling the mapped-ram migration stream format which expects a seekable transport. The QIOChannel read and write methods will use the preadv/pwritev versions which don't update the file offset at each call so we can reuse the fd without re-opening for every channel. Contrary to the socket migration, the file migration doesn't need an asynchronous channel creation process, so expose multifd_channel_connect() and call it directly. Note that this is just setup code and multifd cannot yet make use of the file channels. Signed-off-by: Fabiano Rosas --- - moved flags change to another patch - removed channels_created assert --- migration/file.c | 41 +++++++++++++++++++++++++++++++++++++++-- migration/file.h | 4 ++++ migration/multifd.c | 18 +++++++++++++++--- migration/multifd.h | 1 + 4 files changed, 59 insertions(+), 5 deletions(-) diff --git a/migration/file.c b/migration/file.c index 22d052a71f..83328a7a1b 100644 --- a/migration/file.c +++ b/migration/file.c @@ -12,12 +12,17 @@ #include "channel.h" #include "file.h" #include "migration.h" +#include "multifd.h" #include "io/channel-file.h" #include "io/channel-util.h" #include "trace.h" =20 #define OFFSET_OPTION ",offset=3D" =20 +static struct FileOutgoingArgs { + char *fname; +} outgoing_args; + /* Remove the offset option from @filespec and return it in @offsetp. */ =20 int file_parse_offset(char *filespec, uint64_t *offsetp, Error **errp) @@ -37,6 +42,36 @@ int file_parse_offset(char *filespec, uint64_t *offsetp,= Error **errp) return 0; } =20 +void file_cleanup_outgoing_migration(void) +{ + g_free(outgoing_args.fname); + outgoing_args.fname =3D NULL; +} + +bool file_send_channel_create(gpointer opaque, Error **errp) +{ + QIOChannelFile *ioc; + int flags =3D O_WRONLY; + bool ret =3D true; + + ioc =3D qio_channel_file_new_path(outgoing_args.fname, flags, 0, errp); + if (!ioc) { + ret =3D false; + goto out; + } + + multifd_channel_connect(opaque, QIO_CHANNEL(ioc)); + +out: + /* + * File channel creation is synchronous. However posting this + * semaphore here is simpler than adding a special case. + */ + multifd_send_channel_created(); + + return ret; +} + void file_start_outgoing_migration(MigrationState *s, FileMigrationArgs *file_args, Error **e= rrp) { @@ -47,12 +82,14 @@ void file_start_outgoing_migration(MigrationState *s, =20 trace_migration_file_outgoing(filename); =20 - fioc =3D qio_channel_file_new_path(filename, O_CREAT | O_WRONLY | O_TR= UNC, - 0600, errp); + fioc =3D qio_channel_file_new_path(filename, O_CREAT | O_TRUNC | O_WRO= NLY, + 0660, errp); if (!fioc) { return; } =20 + outgoing_args.fname =3D g_strdup(filename); + ioc =3D QIO_CHANNEL(fioc); if (offset && qio_channel_io_seek(ioc, offset, SEEK_SET, errp) < 0) { return; diff --git a/migration/file.h b/migration/file.h index 37d6a08bfc..4577f9efdd 100644 --- a/migration/file.h +++ b/migration/file.h @@ -9,10 +9,14 @@ #define QEMU_MIGRATION_FILE_H =20 #include "qapi/qapi-types-migration.h" +#include "io/task.h" +#include "channel.h" =20 void file_start_incoming_migration(FileMigrationArgs *file_args, Error **e= rrp); =20 void file_start_outgoing_migration(MigrationState *s, FileMigrationArgs *file_args, Error **e= rrp); int file_parse_offset(char *filespec, uint64_t *offsetp, Error **errp); +void file_cleanup_outgoing_migration(void); +bool file_send_channel_create(gpointer opaque, Error **errp); #endif diff --git a/migration/multifd.c b/migration/multifd.c index 3574fd3953..f155223303 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -17,6 +17,7 @@ #include "exec/ramblock.h" #include "qemu/error-report.h" #include "qapi/error.h" +#include "file.h" #include "ram.h" #include "migration.h" #include "migration-stats.h" @@ -28,6 +29,7 @@ #include "threadinfo.h" #include "options.h" #include "qemu/yank.h" +#include "io/channel-file.h" #include "io/channel-socket.h" #include "yank_functions.h" =20 @@ -694,6 +696,7 @@ static bool multifd_send_cleanup_channel(MultiFDSendPar= ams *p, Error **errp) { if (p->c) { migration_ioc_unregister_yank(p->c); + qio_channel_close(p->c, NULL); object_unref(OBJECT(p->c)); p->c =3D NULL; } @@ -715,6 +718,7 @@ static bool multifd_send_cleanup_channel(MultiFDSendPar= ams *p, Error **errp) =20 static void multifd_send_cleanup_state(void) { + file_cleanup_outgoing_migration(); socket_cleanup_outgoing_migration(); qemu_sem_destroy(&multifd_send_state->channels_created); qemu_sem_destroy(&multifd_send_state->channels_ready); @@ -977,7 +981,7 @@ static bool multifd_tls_channel_connect(MultiFDSendPara= ms *p, return true; } =20 -static void multifd_channel_connect(MultiFDSendParams *p, QIOChannel *ioc) +void multifd_channel_connect(MultiFDSendParams *p, QIOChannel *ioc) { qio_channel_set_delay(ioc, false); =20 @@ -1045,9 +1049,14 @@ out: error_free(local_err); } =20 -static void multifd_new_send_channel_create(gpointer opaque) +static bool multifd_new_send_channel_create(gpointer opaque, Error **errp) { + if (!multifd_use_packets()) { + return file_send_channel_create(opaque, errp); + } + socket_send_channel_create(multifd_new_send_channel_async, opaque); + return true; } =20 bool multifd_send_setup(void) @@ -1096,7 +1105,10 @@ bool multifd_send_setup(void) p->page_size =3D qemu_target_page_size(); p->page_count =3D page_count; p->write_flags =3D 0; - multifd_new_send_channel_create(p); + + if (!multifd_new_send_channel_create(p, &local_err)) { + return -1; + } } =20 /* diff --git a/migration/multifd.h b/migration/multifd.h index 1d8bbaf96b..db8887f088 100644 --- a/migration/multifd.h +++ b/migration/multifd.h @@ -227,5 +227,6 @@ static inline void multifd_send_prepare_header(MultiFDS= endParams *p) p->iovs_num++; } =20 +void multifd_channel_connect(MultiFDSendParams *p, QIOChannel *ioc); =20 #endif --=20 2.35.3