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authorPaolo Bonzini <pbonzini@redhat.com>2013-02-22 17:36:42 +0100
committerJuan Quintela <quintela@redhat.com>2013-03-11 13:32:02 +0100
commite6a1cf21328802f3a83e84e893b8cb8a468141cc (patch)
tree57ca206cbfe0dd6640a9a5f585692016c6182b11
parentf8bbc1286337a8506162b5785babe6f2a7de2476 (diff)
migration: use QEMUFile for writing outgoing migration data
Second, drop the file descriptor indirection, and write directly to the QEMUFile. Reviewed-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
-rw-r--r--include/migration/migration.h4
-rw-r--r--migration-exec.c12
-rw-r--r--migration-fd.c12
-rw-r--r--migration-tcp.c12
-rw-r--r--migration-unix.c12
-rw-r--r--migration.c46
6 files changed, 8 insertions, 90 deletions
diff --git a/include/migration/migration.h b/include/migration/migration.h
index 1f8f305ac9..ae94706bdf 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 8c3f72050a..1c539de931 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 463645794c..07c758ab6b 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 1e8e00411b..5ea4f3d2b6 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 11917f4f2a..64bfa31e35 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 52126d86cc..681a459812 100644
--- a/migration.c
+++ b/migration.c
@@ -301,25 +301,6 @@ 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");
@@ -333,7 +314,6 @@ 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;
}
@@ -519,8 +499,7 @@ 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;
+ int ret;
DPRINTF("putting %d bytes at %" PRId64 "\n", size, pos);
@@ -528,22 +507,14 @@ 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);
+ ret = qemu_file_get_error(s->migration_file);
+ if (ret) {
+ return ret;
}
- return sent;
+ s->bytes_xfer += size;
+ return size;
}
static int migration_close(void *opaque)
@@ -564,7 +535,7 @@ static int migration_get_fd(void *opaque)
{
MigrationState *s = opaque;
- return s->fd;
+ return qemu_get_fd(s->migration_file);
}
/*
@@ -721,7 +692,6 @@ 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,