From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: "Daniel P. Berrange" <berrange@redhat.com>
Cc: Amit Shah <amit.shah@redhat.com>,
qemu-devel@nongnu.org, Juan Quintela <quintela@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v1 05/22] migration: introduce set_blocking function in QEMUFileOps
Date: Thu, 28 Jan 2016 18:00:29 +0000 [thread overview]
Message-ID: <20160128180028.GE2911@work-vm> (raw)
In-Reply-To: <1452599056-27357-6-git-send-email-berrange@redhat.com>
* Daniel P. Berrange (berrange@redhat.com) wrote:
> Remove the assumption that every QEMUFile implementation has
> a file descriptor available by introducing a new function
> in QEMUFileOps to change the blocking state of a QEMUFile.
>
> If not set, it will fallback to the original code using
> the get_fd method.
>
> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> include/migration/qemu-file.h | 5 +++++
> migration/migration.c | 4 +---
> migration/qemu-file.c | 10 +++++++---
> 3 files changed, 13 insertions(+), 6 deletions(-)
>
> diff --git a/include/migration/qemu-file.h b/include/migration/qemu-file.h
> index ddffc6a..072bb38 100644
> --- a/include/migration/qemu-file.h
> +++ b/include/migration/qemu-file.h
> @@ -55,6 +55,10 @@ typedef int (QEMUFileCloseFunc)(void *opaque);
> */
> typedef int (QEMUFileGetFD)(void *opaque);
>
> +/* Called to change the blocking mode of the file
> + */
> +typedef int (QEMUFileSetBlocking)(void *opaque, bool enabled);
> +
> /*
> * This function writes an iovec to file. The handler must write all
> * of the data or return a negative errno value.
> @@ -108,6 +112,7 @@ typedef struct QEMUFileOps {
> QEMUFileGetBufferFunc *get_buffer;
> QEMUFileCloseFunc *close;
> QEMUFileGetFD *get_fd;
> + QEMUFileSetBlocking *set_blocking;
> QEMUFileWritevBufferFunc *writev_buffer;
> QEMURetPathFunc *get_return_path;
> QEMUFileShutdownFunc *shut_down;
> diff --git a/migration/migration.c b/migration/migration.c
> index c842499..c964a8d 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -408,11 +408,9 @@ static void process_incoming_migration_co(void *opaque)
> void process_incoming_migration(QEMUFile *f)
> {
> Coroutine *co = qemu_coroutine_create(process_incoming_migration_co);
> - int fd = qemu_get_fd(f);
>
> - assert(fd != -1);
> migrate_decompress_threads_create();
> - qemu_set_nonblock(fd);
> + qemu_file_set_blocking(f, false);
> qemu_coroutine_enter(co, f);
> }
>
> diff --git a/migration/qemu-file.c b/migration/qemu-file.c
> index 337cb4c..fc5977e 100644
> --- a/migration/qemu-file.c
> +++ b/migration/qemu-file.c
> @@ -683,9 +683,13 @@ size_t qemu_get_counted_string(QEMUFile *f, char buf[256])
> */
> void qemu_file_set_blocking(QEMUFile *f, bool block)
> {
> - if (block) {
> - qemu_set_block(qemu_get_fd(f));
> + if (f->ops->set_blocking) {
> + f->ops->set_blocking(f->opaque, block);
> } else {
> - qemu_set_nonblock(qemu_get_fd(f));
> + if (block) {
> + qemu_set_block(qemu_get_fd(f));
> + } else {
> + qemu_set_nonblock(qemu_get_fd(f));
> + }
> }
> }
> --
> 2.5.0
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
next prev parent reply other threads:[~2016-01-28 18:00 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-12 11:43 [Qemu-devel] [PATCH v1 00/22] Convert migration to QIOChannel & support TLS Daniel P. Berrange
2016-01-12 11:43 ` [Qemu-devel] [PATCH v1 01/22] s390: use FILE instead of QEMUFile for creating text file Daniel P. Berrange
2016-01-12 11:58 ` Cornelia Huck
2016-01-12 12:01 ` Daniel P. Berrange
2016-01-12 12:05 ` Cornelia Huck
2016-02-12 17:19 ` Dr. David Alan Gilbert
2016-01-12 11:43 ` [Qemu-devel] [PATCH v1 02/22] migration: remove use of qemu_bufopen from vmstate tests Daniel P. Berrange
2016-01-28 17:45 ` Dr. David Alan Gilbert
2016-01-12 11:43 ` [Qemu-devel] [PATCH v1 03/22] migration: ensure qemu_fflush() always writes full data amount Daniel P. Berrange
2016-01-28 17:53 ` Dr. David Alan Gilbert
2016-02-03 13:31 ` Daniel P. Berrange
2016-01-12 11:43 ` [Qemu-devel] [PATCH v1 04/22] migration: split migration hooks out of QEMUFileOps Daniel P. Berrange
2016-01-28 17:57 ` Dr. David Alan Gilbert
2016-01-12 11:43 ` [Qemu-devel] [PATCH v1 05/22] migration: introduce set_blocking function in QEMUFileOps Daniel P. Berrange
2016-01-28 18:00 ` Dr. David Alan Gilbert [this message]
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 06/22] migration: force QEMUFile to blocking mode for outgoing migration Daniel P. Berrange
2016-01-28 18:17 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 07/22] migration: introduce a new QEMUFile impl based on QIOChannel Daniel P. Berrange
2016-02-02 17:06 ` Dr. David Alan Gilbert
2016-02-03 13:37 ` Daniel P. Berrange
2016-02-12 17:16 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 08/22] migration: convert post-copy to use QIOChannelBuffer Daniel P. Berrange
2016-01-25 19:38 ` Dr. David Alan Gilbert
2016-01-25 22:15 ` Daniel P. Berrange
2016-01-26 18:59 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 09/22] migration: convert unix socket protocol to use QIOChannel Daniel P. Berrange
2016-02-02 18:02 ` Dr. David Alan Gilbert
2016-02-03 11:25 ` Daniel P. Berrange
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 10/22] migration: convert tcp " Daniel P. Berrange
2016-02-02 18:19 ` Dr. David Alan Gilbert
2016-02-03 10:02 ` Daniel P. Berrange
2016-02-03 10:33 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 11/22] migration: convert fd " Daniel P. Berrange
2016-02-02 18:46 ` Dr. David Alan Gilbert
2016-02-03 10:05 ` Daniel P. Berrange
2016-02-03 10:29 ` Dr. David Alan Gilbert
2016-02-03 10:39 ` Daniel P. Berrange
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 12/22] migration: convert exec " Daniel P. Berrange
2016-02-02 18:53 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 13/22] migration: convert RDMA to use QIOChannel interface Daniel P. Berrange
2016-02-02 20:01 ` Dr. David Alan Gilbert
2016-02-03 11:37 ` Daniel P. Berrange
2016-02-03 13:23 ` Dr. David Alan Gilbert
2016-02-03 13:25 ` Daniel P. Berrange
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 14/22] migration: convert savevm to use QIOChannel for writing to files Daniel P. Berrange
2016-02-03 9:52 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 15/22] migration: delete QEMUFile buffer implementation Daniel P. Berrange
2016-02-03 9:54 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 16/22] migration: delete QEMUSizedBuffer struct Daniel P. Berrange
2016-02-03 9:55 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 17/22] migration: delete QEMUFile sockets implementation Daniel P. Berrange
2016-02-03 9:56 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 18/22] migration: delete QEMUFile stdio implementation Daniel P. Berrange
2016-02-03 9:58 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 19/22] migration: move definition of struct QEMUFile back into qemu-file.c Daniel P. Berrange
2016-02-05 18:32 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 20/22] migration: support TLS encryption with TCP migration backend Daniel P. Berrange
2016-02-12 17:09 ` Dr. David Alan Gilbert
2016-02-12 17:25 ` Daniel P. Berrange
2016-02-15 11:00 ` Daniel P. Berrange
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 21/22] migration: remove support for non-iovec based write handlers Daniel P. Berrange
2016-02-12 15:48 ` Dr. David Alan Gilbert
2016-01-12 11:44 ` [Qemu-devel] [PATCH v1 22/22] migration: remove qemu_get_fd method from QEMUFile Daniel P. Berrange
2016-02-12 15:51 ` Dr. David Alan Gilbert
2016-01-12 11:59 ` [Qemu-devel] [PATCH v1 00/22] Convert migration to QIOChannel & support TLS Daniel P. Berrange
2016-01-20 18:01 ` Daniel P. Berrange
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