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Re: [Qemu-devel] [PATCH 05/23] migration: Refactor MigrationState creati


From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH 05/23] migration: Refactor MigrationState creation
Date: Tue, 04 Oct 2011 09:23:52 -0500
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.21) Gecko/20110831 Lightning/1.0b2 Thunderbird/3.1.13

On 09/23/2011 07:56 AM, Juan Quintela wrote:
Signed-off-by: Juan Quintela<address@hidden>
---
  migration-exec.c |   16 +---------------
  migration-fd.c   |   16 +---------------
  migration-tcp.c  |   15 +--------------
  migration-unix.c |   15 +--------------
  migration.c      |   29 +++++++++++++++++++++++++----
  migration.h      |   11 +++--------
  6 files changed, 32 insertions(+), 70 deletions(-)

diff --git a/migration-exec.c b/migration-exec.c
index 0ed5976..db11374 100644
--- a/migration-exec.c
+++ b/migration-exec.c
@@ -71,7 +71,7 @@ MigrationState *exec_start_outgoing_migration(Monitor *mon,
      MigrationState *s;
      FILE *f;

-    s = g_malloc0(sizeof(*s));
+    s = migrate_create_state(mon, bandwidth_limit, detach, blk, inc);

      f = popen(command, "w");
      if (f == NULL) {
@@ -92,20 +92,6 @@ MigrationState *exec_start_outgoing_migration(Monitor *mon,
      s->close = exec_close;
      s->get_error = file_errno;
      s->write = file_write;
-    s->cancel = migrate_fd_cancel;
-    s->get_status = migrate_fd_get_status;
-    s->release = migrate_fd_release;
-
-    s->blk = blk;
-    s->shared = inc;
-
-    s->state = MIG_STATE_ACTIVE;
-    s->mon = NULL;
-    s->bandwidth_limit = bandwidth_limit;
-
-    if (!detach) {
-        migrate_fd_monitor_suspend(s, mon);
-    }

      migrate_fd_connect(s);
      return s;
diff --git a/migration-fd.c b/migration-fd.c
index e78fd4e..2235a2f 100644
--- a/migration-fd.c
+++ b/migration-fd.c
@@ -59,7 +59,7 @@ MigrationState *fd_start_outgoing_migration(Monitor *mon,
  {
      MigrationState *s;

-    s = g_malloc0(sizeof(*s));
+    s = migrate_create_state(mon, bandwidth_limit, detach, blk, inc);

      s->fd = monitor_get_fd(mon, fdname);
      if (s->fd == -1) {
@@ -75,20 +75,6 @@ MigrationState *fd_start_outgoing_migration(Monitor *mon,
      s->get_error = fd_errno;
      s->write = fd_write;
      s->close = fd_close;
-    s->cancel = migrate_fd_cancel;
-    s->get_status = migrate_fd_get_status;
-    s->release = migrate_fd_release;
-
-    s->blk = blk;
-    s->shared = inc;
-
-    s->state = MIG_STATE_ACTIVE;
-    s->mon = NULL;
-    s->bandwidth_limit = bandwidth_limit;
-
-    if (!detach) {
-        migrate_fd_monitor_suspend(s, mon);
-    }

      migrate_fd_connect(s);
      return s;
diff --git a/migration-tcp.c b/migration-tcp.c
index d6feb23..db8cea2 100644
--- a/migration-tcp.c
+++ b/migration-tcp.c
@@ -89,21 +89,12 @@ MigrationState *tcp_start_outgoing_migration(Monitor *mon,
      if (parse_host_port(&addr, host_port)<  0)
          return NULL;

-    s = g_malloc0(sizeof(*s));
+    s = migrate_create_state(mon, bandwidth_limit, detach, blk, inc);

      s->get_error = socket_errno;
      s->write = socket_write;
      s->close = tcp_close;
-    s->cancel = migrate_fd_cancel;
-    s->get_status = migrate_fd_get_status;
-    s->release = migrate_fd_release;

-    s->blk = blk;
-    s->shared = inc;
-
-    s->state = MIG_STATE_ACTIVE;
-    s->mon = NULL;
-    s->bandwidth_limit = bandwidth_limit;
      s->fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
      if (s->fd == -1) {
          g_free(s);
@@ -112,10 +103,6 @@ MigrationState *tcp_start_outgoing_migration(Monitor *mon,

      socket_set_nonblock(s->fd);

-    if (!detach) {
-        migrate_fd_monitor_suspend(s, mon);
-    }
-
      do {
          ret = connect(s->fd, (struct sockaddr *)&addr, sizeof(addr));
          if (ret == -1)
diff --git a/migration-unix.c b/migration-unix.c
index 3b9017b..74c6dde 100644
--- a/migration-unix.c
+++ b/migration-unix.c
@@ -88,21 +88,12 @@ MigrationState *unix_start_outgoing_migration(Monitor *mon,
      addr.sun_family = AF_UNIX;
      snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", path);

-    s = g_malloc0(sizeof(*s));
+    s = migrate_create_state(mon, bandwidth_limit, detach, blk, inc);

      s->get_error = unix_errno;
      s->write = unix_write;
      s->close = unix_close;
-    s->cancel = migrate_fd_cancel;
-    s->get_status = migrate_fd_get_status;
-    s->release = migrate_fd_release;

-    s->blk = blk;
-    s->shared = inc;
-
-    s->state = MIG_STATE_ACTIVE;
-    s->mon = NULL;
-    s->bandwidth_limit = bandwidth_limit;
      s->fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
      if (s->fd<  0) {
          DPRINTF("Unable to open socket");
@@ -125,10 +116,6 @@ MigrationState *unix_start_outgoing_migration(Monitor *mon,
          goto err_after_open;
      }

-    if (!detach) {
-        migrate_fd_monitor_suspend(s, mon);
-    }
-
      if (ret>= 0)
          migrate_fd_connect(s);

diff --git a/migration.c b/migration.c
index b27a322..990667e 100644
--- a/migration.c
+++ b/migration.c
@@ -263,7 +263,7 @@ void do_info_migrate(Monitor *mon, QObject **ret_data)

  /* shared migration helpers */

-void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
+static void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
  {
      s->mon = mon;
      if (monitor_suspend(mon) == 0) {
@@ -404,12 +404,12 @@ void migrate_fd_put_ready(void *opaque)
      }
  }

-int migrate_fd_get_status(MigrationState *s)
+static int migrate_fd_get_status(MigrationState *s)
  {
      return s->state;
  }

-void migrate_fd_cancel(MigrationState *s)
+static void migrate_fd_cancel(MigrationState *s)
  {
      if (s->state != MIG_STATE_ACTIVE)
          return;
@@ -423,7 +423,7 @@ void migrate_fd_cancel(MigrationState *s)
      migrate_fd_cleanup(s);
  }

-void migrate_fd_release(MigrationState *s)
+static void migrate_fd_release(MigrationState *s)
  {

      DPRINTF("releasing state\n");
@@ -488,3 +488,24 @@ int get_migration_state(void)
          return MIG_STATE_ERROR;
      }
  }
+
+MigrationState *migrate_create_state(Monitor *mon, int64_t bandwidth_limit,
+                                     int detach, int blk, int inc)


I think this would fit better if it were migrate_new() or migrate_open().

It definitely should be in the form noun_verb and not noun_verb_noun().

Regards,

Anthony Liguori

+{
+    MigrationState *s = g_malloc0(sizeof(*s));
+
+    s->cancel = migrate_fd_cancel;
+    s->get_status = migrate_fd_get_status;
+    s->release = migrate_fd_release;
+    s->blk = blk;
+    s->shared = inc;
+    s->mon = NULL;
+    s->bandwidth_limit = bandwidth_limit;
+    s->state = MIG_STATE_ACTIVE;
+
+    if (!detach) {
+        migrate_fd_monitor_suspend(s, mon);
+    }
+
+    return s;
+}
diff --git a/migration.h b/migration.h
index e24efed..32462f7 100644
--- a/migration.h
+++ b/migration.h
@@ -98,8 +98,6 @@ MigrationState *fd_start_outgoing_migration(Monitor *mon,
                                            int blk,
                                            int inc);

-void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon);
-
  void migrate_fd_error(MigrationState *s);

  int migrate_fd_cleanup(MigrationState *s);
@@ -112,16 +110,13 @@ void migrate_fd_connect(MigrationState *s);

  void migrate_fd_put_ready(void *opaque);

-int migrate_fd_get_status(MigrationState *mig_state);
-
-void migrate_fd_cancel(MigrationState *mig_state);
-
-void migrate_fd_release(MigrationState *mig_state);
-
  void migrate_fd_wait_for_unfreeze(void *opaque);

  int migrate_fd_close(void *opaque);

+MigrationState *migrate_create_state(Monitor *mon, int64_t bandwidth_limit,
+                                     int detach, int blk, int inc);
+
  void add_migration_state_change_notifier(Notifier *notify);
  void remove_migration_state_change_notifier(Notifier *notify);
  int get_migration_state(void);




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