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[Qemu-devel] [PATCH v4 15/28] migration: convert fd socket protocol to u
From: |
Daniel P. Berrange |
Subject: |
[Qemu-devel] [PATCH v4 15/28] migration: convert fd socket protocol to use QIOChannel |
Date: |
Fri, 11 Mar 2016 16:37:49 +0000 |
Convert the fd socket migration protocol driver to use
QIOChannel and QEMUFileChannel, instead of plain sockets
APIs. It can be unconditionally built because the
QIOChannel APIs it uses will take care to report suitable
error messages if needed.
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
Signed-off-by: Daniel P. Berrange <address@hidden>
---
migration/Makefile.objs | 4 +--
migration/fd.c | 76 +++++++++++++++++++------------------------------
migration/migration.c | 4 ---
trace-events | 4 +++
4 files changed, 35 insertions(+), 53 deletions(-)
diff --git a/migration/Makefile.objs b/migration/Makefile.objs
index 59e8c09..0987bb6 100644
--- a/migration/Makefile.objs
+++ b/migration/Makefile.objs
@@ -1,11 +1,11 @@
-common-obj-y += migration.o socket.o
+common-obj-y += migration.o socket.o fd.o
common-obj-y += vmstate.o
common-obj-y += qemu-file.o qemu-file-buf.o qemu-file-unix.o qemu-file-stdio.o
common-obj-y += qemu-file-channel.o
common-obj-y += xbzrle.o postcopy-ram.o
common-obj-$(CONFIG_RDMA) += rdma.o
-common-obj-$(CONFIG_POSIX) += exec.o fd.o
+common-obj-$(CONFIG_POSIX) += exec.o
common-obj-y += block.o
diff --git a/migration/fd.c b/migration/fd.c
index 085dd7c..1a7fd43 100644
--- a/migration/fd.c
+++ b/migration/fd.c
@@ -1,10 +1,11 @@
/*
* QEMU live migration via generic fd
*
- * Copyright Red Hat, Inc. 2009
+ * Copyright Red Hat, Inc. 2009-2016
*
* Authors:
* Chris Lalancette <address@hidden>
+ * Daniel P. Berrange <address@hidden>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
@@ -14,76 +15,57 @@
*/
#include "qemu/osdep.h"
-#include "qemu-common.h"
-#include "qemu/main-loop.h"
-#include "qemu/sockets.h"
#include "migration/migration.h"
#include "monitor/monitor.h"
-#include "migration/qemu-file.h"
-#include "block/block.h"
+#include "io/channel-util.h"
+#include "trace.h"
-//#define DEBUG_MIGRATION_FD
-
-#ifdef DEBUG_MIGRATION_FD
-#define DPRINTF(fmt, ...) \
- do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0)
-#else
-#define DPRINTF(fmt, ...) \
- do { } while (0)
-#endif
-
-static bool fd_is_socket(int fd)
-{
- struct stat stat;
- int ret = fstat(fd, &stat);
- if (ret == -1) {
- /* When in doubt say no */
- return false;
- }
- return S_ISSOCK(stat.st_mode);
-}
void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error
**errp)
{
+ QIOChannel *ioc;
int fd = monitor_get_fd(cur_mon, fdname, errp);
if (fd == -1) {
return;
}
- if (fd_is_socket(fd)) {
- s->to_dst_file = qemu_fopen_socket(fd, "wb");
- } else {
- s->to_dst_file = qemu_fdopen(fd, "wb");
+ trace_migration_fd_outgoing(fd);
+ ioc = qio_channel_new_fd(fd, errp);
+ if (!ioc) {
+ close(fd);
+ return;
}
- migrate_fd_connect(s);
+ migration_set_outgoing_channel(s, ioc);
+ object_unref(OBJECT(ioc));
}
-static void fd_accept_incoming_migration(void *opaque)
+static gboolean fd_accept_incoming_migration(QIOChannel *ioc,
+ GIOCondition condition,
+ gpointer opaque)
{
- QEMUFile *f = opaque;
-
- qemu_set_fd_handler(qemu_get_fd(f), NULL, NULL, NULL);
- process_incoming_migration(f);
+ migration_set_incoming_channel(migrate_get_current(), ioc);
+ object_unref(OBJECT(ioc));
+ return FALSE; /* unregister */
}
void fd_start_incoming_migration(const char *infd, Error **errp)
{
+ QIOChannel *ioc;
int fd;
- QEMUFile *f;
-
- DPRINTF("Attempting to start an incoming migration via fd\n");
fd = strtol(infd, NULL, 0);
- if (fd_is_socket(fd)) {
- f = qemu_fopen_socket(fd, "rb");
- } else {
- f = qemu_fdopen(fd, "rb");
- }
- if(f == NULL) {
- error_setg_errno(errp, errno, "failed to open the source descriptor");
+ trace_migration_fd_incoming(fd);
+
+ ioc = qio_channel_new_fd(fd, errp);
+ if (!ioc) {
+ close(fd);
return;
}
- qemu_set_fd_handler(fd, fd_accept_incoming_migration, NULL, f);
+ qio_channel_add_watch(ioc,
+ G_IO_IN,
+ fd_accept_incoming_migration,
+ NULL,
+ NULL);
}
diff --git a/migration/migration.c b/migration/migration.c
index ac373c3..bf7a976 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -317,10 +317,8 @@ void qemu_start_incoming_migration(const char *uri, Error
**errp)
#endif
} else if (strstart(uri, "unix:", &p)) {
unix_start_incoming_migration(p, errp);
-#if !defined(WIN32)
} else if (strstart(uri, "fd:", &p)) {
fd_start_incoming_migration(p, errp);
-#endif
} else {
error_setg(errp, "unknown migration protocol: %s", uri);
}
@@ -1068,10 +1066,8 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk,
#endif
} else if (strstart(uri, "unix:", &p)) {
unix_start_outgoing_migration(s, p, &local_err);
-#if !defined(WIN32)
} else if (strstart(uri, "fd:", &p)) {
fd_start_outgoing_migration(s, p, &local_err);
-#endif
} else {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri",
"a valid migration protocol");
diff --git a/trace-events b/trace-events
index 68e665c..07280e5 100644
--- a/trace-events
+++ b/trace-events
@@ -1597,6 +1597,10 @@ postcopy_ram_incoming_cleanup_entry(void) ""
postcopy_ram_incoming_cleanup_exit(void) ""
postcopy_ram_incoming_cleanup_join(void) ""
+# migration/fd.c
+migration_fd_outgoing(int fd) "fd=%d"
+migration_fd_incoming(int fd) "fd=%d"
+
# migration/socket.c
migration_socket_incoming_accepted(void) ""
migration_socket_outgoing_connected(void) ""
--
2.5.0
- [Qemu-devel] [PATCH v4 10/28] migration: add reporting of errors for outgoing migration, (continued)
- [Qemu-devel] [PATCH v4 10/28] migration: add reporting of errors for outgoing migration, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 11/28] migration: convert post-copy to use QIOChannelBuffer, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 09/28] migration: add helpers for creating QEMUFile from a QIOChannel, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 12/28] migration: convert unix socket protocol to use QIOChannel, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 13/28] migration: rename unix.c to socket.c, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 14/28] migration: convert tcp socket protocol to use QIOChannel, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 18/28] migration: convert savevm to use QIOChannel for writing to files, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 16/28] migration: convert exec socket protocol to use QIOChannel, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 15/28] migration: convert fd socket protocol to use QIOChannel,
Daniel P. Berrange <=
- [Qemu-devel] [PATCH v4 19/28] migration: delete QEMUFile buffer implementation, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 22/28] migration: delete QEMUFile stdio implementation, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 24/28] migration: don't use an array for storing migrate parameters, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 20/28] migration: delete QEMUSizedBuffer struct, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 21/28] migration: delete QEMUFile sockets implementation, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 23/28] migration: move definition of struct QEMUFile back into qemu-file.c, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 25/28] migration: define 'tls-creds' and 'tls-hostname' migration parameters, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 28/28] migration: remove qemu_get_fd method from QEMUFile, Daniel P. Berrange, 2016/03/11
- [Qemu-devel] [PATCH v4 17/28] migration: convert RDMA to use QIOChannel interface, Daniel P. Berrange, 2016/03/11