net/haproxy/patches/0017-MEDIUM-listener-support-rebinding-during-resume.patch

   1 From ff12090bf067a1ddd56bed14cf27371cdf2e77cb Mon Sep 17 00:00:00 2001
   2 From: Willy Tarreau <w@1wt.eu>
   3 Date: Mon, 7 Jul 2014 21:06:24 +0200
   4 Subject: [PATCH 17/21] MEDIUM: listener: support rebinding during resume()
   5
   6 When a listener resumes operations, supporting a full rebind makes it
   7 possible to perform a full stop as a pause(). This will be used for
   8 pausing abstract namespace unix sockets.
   9 (cherry picked from commit 1c4b814087189b4b0225a473b7cb0a844bc30839)
  10 ---
  11  src/listener.c | 18 +++++++++++++++++-
  12  1 file changed, 17 insertions(+), 1 deletion(-)
  13
  14 diff --git a/src/listener.c b/src/listener.c
  15 index 67f8ca7..11df69f 100644
  16 --- a/src/listener.c
  17 +++ b/src/listener.c
  18 @@ -120,10 +120,26 @@ int pause_listener(struct listener *l)
  19   * may replace enable_listener(). The resulting state will either be LI_READY
  20   * or LI_FULL. 0 is returned in case of failure to resume (eg: dead socket).
  21   * Listeners bound to a different process are not woken up unless we're in
  22 - * foreground mode.
  23 + * foreground mode. If the listener was only in the assigned state, it's totally
  24 + * rebound. This can happen if a pause() has completely stopped it. If the
  25 + * resume fails, 0 is returned and an error might be displayed.
  26   */
  27  int resume_listener(struct listener *l)
  28  {
  29 +       if (l->state == LI_ASSIGNED) {
  30 +               char msg[100];
  31 +               int err;
  32 +
  33 +               err = l->proto->bind(l, msg, sizeof(msg));
  34 +               if (err & ERR_ALERT)
  35 +                       Alert("Resuming listener: %s\n", msg);
  36 +               else if (err & ERR_WARN)
  37 +                       Warning("Resuming listener: %s\n", msg);
  38 +
  39 +               if (err & (ERR_FATAL | ERR_ABORT))
  40 +                       return 0;
  41 +       }
  42 +
  43         if (l->state < LI_PAUSED)
  44                 return 0;
  45
  46 --
  47 1.8.5.5
  48