From patchwork Fri Feb 15 17:47:07 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paolo Bonzini X-Patchwork-Id: 220819 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id DE8F92C007C for ; Sat, 16 Feb 2013 06:12:47 +1100 (EST) Received: from localhost ([::1]:41679 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U6QiD-0000Pp-Ue for incoming@patchwork.ozlabs.org; Fri, 15 Feb 2013 14:12:45 -0500 Received: from eggs.gnu.org ([208.118.235.92]:51456) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U6POw-0007TZ-FH for qemu-devel@nongnu.org; Fri, 15 Feb 2013 12:48:52 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1U6POr-0004Us-UT for qemu-devel@nongnu.org; Fri, 15 Feb 2013 12:48:46 -0500 Received: from mail-ve0-f171.google.com ([209.85.128.171]:44663) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1U6POr-0004Ts-P6 for qemu-devel@nongnu.org; Fri, 15 Feb 2013 12:48:41 -0500 Received: by mail-ve0-f171.google.com with SMTP id b10so3304154vea.2 for ; Fri, 15 Feb 2013 09:48:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=x-received:sender:from:to:cc:subject:date:message-id:x-mailer :in-reply-to:references; bh=RqpXkcDQgrV0kYsGKtnnkS/iCVWwZvcr2XzeYuVdR7w=; b=jbsRzQyaJ7N9CGZezd/aLRARsoSc/HBmVQZetYVRj2yQ4lRB/F8DfzG2YBi0xcEaY3 FFNWwaPXdYef4J2Lm5RhgkFRdxAIQfxGgD0vokKDs2EkMum8+ytvLxBHY+3r2By6LgwP dJvXJ2PhIlt29CCc9j+OboRw9sadaAUEbN5eLTC3Y+30NK42GaabOvxoeexjB3UU+6r1 eKKpu7f1GP58cG87XfNNbJPUngk85qtdL8YkGadFTcw6yD+l8CKMOKciRK0Aqj66QFv5 cFqbfp7pRTLhhX0W5WdHdUv6PRcwu92EXaDt+FQmWvoaiSuTW8Khnaj67TtVF3glwv3b +TjA== X-Received: by 10.58.18.201 with SMTP id y9mr4474519ved.36.1360950521076; Fri, 15 Feb 2013 09:48:41 -0800 (PST) Received: from yakj.usersys.redhat.com (93-34-179-137.ip50.fastwebnet.it. [93.34.179.137]) by mx.google.com with ESMTPS id yu12sm65402142vec.6.2013.02.15.09.48.39 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Fri, 15 Feb 2013 09:48:40 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Date: Fri, 15 Feb 2013 18:47:07 +0100 Message-Id: <1360950433-17106-36-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1360950433-17106-1-git-send-email-pbonzini@redhat.com> References: <1360950433-17106-1-git-send-email-pbonzini@redhat.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 209.85.128.171 Cc: owasserm@redhat.com, chegu_vinod@hp.com, quintela@redhat.com Subject: [Qemu-devel] [PATCH 35/41] migration: use QEMUFile for writing outgoing migration data X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Second, drop the file descriptor indirection, and write directly to the QEMUFile. Signed-off-by: Paolo Bonzini Reviewed-by: Orit Wasserman Reviewed-by: Juan Quintela --- include/migration/migration.h | 4 --- migration-exec.c | 12 ----------- migration-fd.c | 12 ----------- migration-tcp.c | 12 ----------- migration-unix.c | 12 ----------- migration.c | 44 +++++----------------------------------- 6 files changed, 6 insertions(+), 90 deletions(-) diff --git a/include/migration/migration.h b/include/migration/migration.h index cf3e81c..bde13c2 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -40,10 +40,6 @@ struct MigrationState QEMUFile *file; QEMUFile *migration_file; - int fd; - int (*get_error)(MigrationState *s); - int (*write)(MigrationState *s, const void *buff, size_t size); - int state; MigrationParams params; int64_t total_time; diff --git a/migration-exec.c b/migration-exec.c index 8c3f720..1c539de 100644 --- a/migration-exec.c +++ b/migration-exec.c @@ -33,16 +33,6 @@ do { } while (0) #endif -static int file_errno(MigrationState *s) -{ - return errno; -} - -static int file_write(MigrationState *s, const void * buf, size_t size) -{ - return write(s->fd, buf, size); -} - void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp) { s->migration_file = qemu_popen_cmd(command, "w"); @@ -51,8 +41,6 @@ void exec_start_outgoing_migration(MigrationState *s, const char *command, Error return; } - s->get_error = file_errno; - s->write = file_write; migrate_fd_connect(s); } diff --git a/migration-fd.c b/migration-fd.c index 4636457..07c758a 100644 --- a/migration-fd.c +++ b/migration-fd.c @@ -30,16 +30,6 @@ do { } while (0) #endif -static int fd_errno(MigrationState *s) -{ - return errno; -} - -static int fd_write(MigrationState *s, const void * buf, size_t size) -{ - return write(s->fd, buf, size); -} - void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp) { int fd = monitor_get_fd(cur_mon, fdname, errp); @@ -48,8 +38,6 @@ void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error ** } s->migration_file = qemu_fdopen(fd, "wb"); - s->get_error = fd_errno; - s->write = fd_write; migrate_fd_connect(s); } diff --git a/migration-tcp.c b/migration-tcp.c index 1e8e004..5ea4f3d 100644 --- a/migration-tcp.c +++ b/migration-tcp.c @@ -29,16 +29,6 @@ do { } while (0) #endif -static int socket_errno(MigrationState *s) -{ - return socket_error(); -} - -static int socket_write(MigrationState *s, const void * buf, size_t size) -{ - return send(s->fd, buf, size, 0); -} - static void tcp_wait_for_connect(int fd, void *opaque) { MigrationState *s = opaque; @@ -56,8 +46,6 @@ static void tcp_wait_for_connect(int fd, void *opaque) void tcp_start_outgoing_migration(MigrationState *s, const char *host_port, Error **errp) { - s->get_error = socket_errno; - s->write = socket_write; inet_nonblocking_connect(host_port, tcp_wait_for_connect, s, errp); } diff --git a/migration-unix.c b/migration-unix.c index 11917f4..64bfa31 100644 --- a/migration-unix.c +++ b/migration-unix.c @@ -29,16 +29,6 @@ do { } while (0) #endif -static int unix_errno(MigrationState *s) -{ - return errno; -} - -static int unix_write(MigrationState *s, const void * buf, size_t size) -{ - return write(s->fd, buf, size); -} - static void unix_wait_for_connect(int fd, void *opaque) { MigrationState *s = opaque; @@ -56,8 +46,6 @@ static void unix_wait_for_connect(int fd, void *opaque) void unix_start_outgoing_migration(MigrationState *s, const char *path, Error **errp) { - s->get_error = unix_errno; - s->write = unix_write; unix_nonblocking_connect(path, unix_wait_for_connect, s, errp); } diff --git a/migration.c b/migration.c index 9cffdd4..68d47cd 100644 --- a/migration.c +++ b/migration.c @@ -291,25 +291,6 @@ void migrate_fd_error(MigrationState *s) notifier_list_notify(&migration_state_notifiers, s); } -static ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data, - size_t size) -{ - ssize_t ret; - - if (s->state != MIG_STATE_ACTIVE) { - return -EIO; - } - - do { - ret = s->write(s, data, size); - } while (ret == -1 && ((s->get_error(s)) == EINTR)); - - if (ret == -1) - ret = -(s->get_error(s)); - - return ret; -} - static void migrate_fd_cancel(MigrationState *s) { DPRINTF("cancelling migration\n"); @@ -323,7 +304,6 @@ int migrate_fd_close(MigrationState *s) if (s->migration_file != NULL) { rc = qemu_fclose(s->migration_file); s->migration_file = NULL; - s->fd = -1; } return rc; } @@ -508,8 +488,6 @@ static int migration_put_buffer(void *opaque, const uint8_t *buf, int64_t pos, int size) { MigrationState *s = opaque; - ssize_t ret; - size_t sent; DPRINTF("putting %d bytes at %" PRId64 "\n", size, pos); @@ -517,22 +495,13 @@ static int migration_put_buffer(void *opaque, const uint8_t *buf, return size; } - sent = 0; - while (size) { - ret = migrate_fd_put_buffer(s, buf, size); - if (ret <= 0) { - DPRINTF("error flushing data, %zd\n", ret); - return ret; - } else { - DPRINTF("flushed %zd byte(s)\n", ret); - sent += ret; - buf += ret; - size -= ret; - s->bytes_xfer += ret; - } + qemu_put_buffer(s->migration_file, buf, size); + if (qemu_file_get_error(s->migration_file)) { + return qemu_file_get_error(s->migration_file); } - return sent; + s->bytes_xfer += size; + return size; } static int migration_close(void *opaque) @@ -553,7 +522,7 @@ static int migration_get_fd(void *opaque) { MigrationState *s = opaque; - return s->fd; + return qemu_get_fd(s->migration_file); } /* @@ -695,7 +664,6 @@ void migrate_fd_connect(MigrationState *s) s->xfer_limit = s->bandwidth_limit / XFER_LIMIT_RATIO; s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s); - s->fd = qemu_get_fd(s->migration_file); s->file = qemu_fopen_ops(s, &migration_file_ops); qemu_thread_create(&s->thread, migration_thread, s,