From f8f7da2b3ac046ec1990b07e15ebb0380749e136 Mon Sep 17 00:00:00 2001
From: Derrick Brashear <shadow@dementia.org>
Date: Thu, 8 Feb 2007 23:59:47 +0000
Subject: [PATCH] STABLE14-use-unix-sockets-20070208

backport for 1.4.x

====================
This delta was composed from multiple commits as part of the CVS->Git migration.
The checkin message with each commit was inconsistent.
The following are the additional commit messages.
====================


option to use unix socket for fssync


(cherry picked from commit a4d52ee772a84212911c52f5d79dd4f02b9a8b2a)
---
 acinclude.m4     | 10 ++++++++++
 src/vol/fssync.c | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/acinclude.m4 b/acinclude.m4
index 54297f274..40d0e3207 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -33,6 +33,8 @@ AC_ARG_ENABLE( fast-restart,
 [  --enable-fast-restart 		enable fast startup of file server without salvaging],, enable_fast_restart="no")
 AC_ARG_ENABLE( bitmap-later,
 [  --enable-bitmap-later 		enable fast startup of file server by not reading bitmap till needed],, enable_bitmap_later="no")
+AC_ARG_ENABLE( unix-sockets,
+[  --enable-unix-sockets               enable use of unix domain sockets for fssync],, enable_unix_sockets="yes")
 AC_ARG_ENABLE( full-vos-listvol-switch,
 [  --disable-full-vos-listvol-switch    disable vos full listvol switch for formatted output],, enable_full_vos_listvol_switch="yes")
 AC_ARG_WITH(dux-kernel-headers,
@@ -1025,6 +1027,14 @@ if test "$enable_bitmap_later" = "yes"; then
 	AC_DEFINE(BITMAP_LATER, 1, [define if you want to salvager to check bitmasks later])
 fi
 
+if test "$enable_unix_sockets" = "yes"; then
+       AC_DEFINE(USE_UNIX_SOCKETS, 1, [define if you want to use UNIX sockets for fssync.])
+       USE_UNIX_SOCKETS="yes"
+else
+       USE_UNIX_SOCKETS="no"
+fi
+AC_SUBST(USE_UNIX_SOCKETS)
+
 if test "$enable_full_vos_listvol_switch" = "yes"; then
 	AC_DEFINE(FULL_LISTVOL_SWITCH, 1, [define if you want to want listvol switch])
 fi
diff --git a/src/vol/fssync.c b/src/vol/fssync.c
index 714aaf5fe..9655600e5 100644
--- a/src/vol/fssync.c
+++ b/src/vol/fssync.c
@@ -48,6 +48,7 @@ static int newVLDB = 1;
 
 #include <afsconfig.h>
 #include <afs/param.h>
+#include <afs/afsutil.h>
 
 RCSID
     ("$Header$");
@@ -94,6 +95,10 @@ RCSID
 #include "volume.h"
 #include "partition.h"
 
+#ifdef USE_UNIX_SOCKETS
+#include <sys/un.h>
+#endif
+
 /*@printflike@*/ extern void Log(const char *format, ...);
 
 #ifdef osi_Assert
@@ -159,7 +164,11 @@ struct Lock FSYNC_handler_lock;
 int
 FSYNC_clientInit(void)
 {
+#ifdef USE_UNIX_SOCKETS
+    struct sockaddr_un addr;
+#else /* USE_UNIX_SOCKETS */
     struct sockaddr_in addr;
+#endif /* USE_UNIX_SOCKETS */
     /* I can't believe the following is needed for localhost connections!! */
     static time_t backoff[] =
 	{ 3, 3, 3, 5, 5, 5, 7, 15, 16, 24, 32, 40, 48, 0 };
@@ -260,6 +269,23 @@ FSYNC_fsInit(void)
 #endif /* AFS_PTHREAD_ENV */
 }
 
+#ifdef USE_UNIX_SOCKETS
+static int
+getport(struct sockaddr_un *addr)
+{
+    int sd;
+    char tbuffer[AFSDIR_PATH_MAX]; 
+
+    strcompose(tbuffer, AFSDIR_PATH_MAX, AFSDIR_SERVER_LOCAL_DIRPATH, "/",
+               "fssync.sock", NULL);
+
+    memset(addr, 0, sizeof(*addr));
+    addr->sun_family = AF_UNIX;
+    strncpy(addr->sun_path, tbuffer, (sizeof(struct sockaddr_un) - sizeof(short)));
+    assert((sd = socket(AF_UNIX, SOCK_STREAM, 0)) >= 0);
+    return sd;
+}
+#else  /* USE_UNIX_SOCKETS */
 static int
 getport(struct sockaddr_in *addr)
 {
@@ -276,13 +302,18 @@ getport(struct sockaddr_in *addr)
 
     return sd;
 }
+#endif
 
 static fd_set FSYNC_readfds;
 
 static void
 FSYNC_sync()
 {
+#ifdef USE_UNIX_SOCKETS
+    struct sockaddr_un addr;
+#else  /* USE_UNIX_SOCKETS */
     struct sockaddr_in addr;
+#endif /* USE_UNIX_SOCKETS */
     int on = 1;
     extern VInit;
     int code;
@@ -290,6 +321,9 @@ FSYNC_sync()
 #ifdef AFS_PTHREAD_ENV
     int tid;
 #endif
+#ifdef USE_UNIX_SOCKETS
+    char tbuffer[AFSDIR_PATH_MAX]; 
+#endif
 
 #ifndef AFS_NT40_ENV
     (void)signal(SIGPIPE, SIG_IGN);
@@ -304,6 +338,13 @@ FSYNC_sync()
     Log("Set thread id %d for FSYNC_sync\n", tid);
 #endif /* AFS_PTHREAD_ENV */
 
+#ifdef USE_UNIX_SOCKETS
+    strcompose(tbuffer, AFSDIR_PATH_MAX, AFSDIR_SERVER_LOCAL_DIRPATH, "/",
+               "fssync.sock", NULL);
+    /* ignore errors */
+    remove(tbuffer);
+#endif /* USE_UNIX_SOCKETS */
+
     while (!VInit) {
 	/* Let somebody else run until level > 0.  That doesn't mean that 
 	 * all volumes have been attached. */
-- 
2.39.5