common-utils: implement generate_glusterfs_ctx_id()

This patch creates a common and shared version of the often copy/
pasted generate_uuid() function, which is used to create an ID string
to uniquely identify an instance of a glusterfs process/glusterfs_ctx_t.

Change-Id: Ie4e697ae28b6e954c5c261c69e37738f289d77e4
BUG: 839950
Signed-off-by: Anand Avati <avati@redhat.com>
Reviewed-on: http://review.gluster.com/3677
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>

4 files changed, 37 insertions, 65 deletions

diff --git a/cli/src/cli.c b/cli/src/cli.c
index 0d9582dcb8c..1a2081edca1 100644
--- a/cli/src/cli.c
+++ b/cli/src/cli.c
@@ -99,41 +99,6 @@ rpc_clnt_prog_t *cli_rpc_prog;
 
 extern struct rpc_clnt_program cli_prog;
 
-
-
-
-static char *
-generate_uuid ()
-{
-        char           tmp_str[1024] = {0,};
-        char           hostname[256] = {0,};
-        struct timeval tv = {0,};
-        char           now_str[32];
-
-        if (gettimeofday (&tv, NULL) == -1) {
-                gf_log ("glusterfsd", GF_LOG_ERROR,
-                        "gettimeofday: failed %s",
-                        strerror (errno));
-        }
-
-        if (gethostname (hostname, 256) == -1) {
-                gf_log ("glusterfsd", GF_LOG_ERROR,
-                        "gethostname: failed %s",
-                        strerror (errno));
-        }
-
-        gf_time_fmt (now_str, sizeof now_str, tv.tv_sec, gf_timefmt_Ymd_T);
-        snprintf (tmp_str, sizeof tmp_str, "%s-%d-%s:%"
-#ifdef GF_DARWIN_HOST_OS
-                  PRId32,
-#else
-                  "ld",
-#endif
-                  hostname, getpid(), now_str, tv.tv_usec);
-
-        return gf_strdup (tmp_str);
-}
-
 static int
 glusterfs_ctx_defaults_init (glusterfs_ctx_t *ctx)
 {
@@ -143,7 +108,7 @@ glusterfs_ctx_defaults_init (glusterfs_ctx_t *ctx)
 
         xlator_mem_acct_init (THIS, cli_mt_end);
 
-        ctx->process_uuid = generate_uuid ();
+        ctx->process_uuid = generate_glusterfs_ctx_id ();
         if (!ctx->process_uuid)
                 return -1;
 
diff --git a/glusterfsd/src/glusterfsd.c b/glusterfsd/src/glusterfsd.c
index acbed554d15..c9c7ad065a5 100644
--- a/glusterfsd/src/glusterfsd.c
+++ b/glusterfsd/src/glusterfsd.c
@@ -941,34 +941,6 @@ reincarnate (int signum)
 }
 
 
-static char *
-generate_uuid ()
-{
-        char           tmp_str[1024] = {0,};
-        char           hostname[256] = {0,};
-        struct timeval tv = {0,};
-        char           now_str[32];
-
-        if (gettimeofday (&tv, NULL) == -1) {
-                gf_log ("glusterfsd", GF_LOG_ERROR,
-                        "gettimeofday: failed %s",
-                        strerror (errno));
-        }
-
-        if (gethostname (hostname, sizeof hostname) == -1) {
-                gf_log ("glusterfsd", GF_LOG_ERROR,
-                        "gethostname: failed %s",
-                        strerror (errno));
-        }
-
-        gf_time_fmt (now_str, sizeof now_str, tv.tv_sec, gf_timefmt_Ymd_T);
-        snprintf (tmp_str, sizeof tmp_str, "%s-%d-%s:%" GF_PRI_SUSECONDS,
-                  hostname, getpid(), now_str, tv.tv_usec);
-
-        return gf_strdup (tmp_str);
-}
-
-
 static uint8_t
 gf_get_process_mode (char *exec_name)
 {
@@ -1064,7 +1036,7 @@ glusterfs_ctx_defaults_init (glusterfs_ctx_t *ctx)
 
         xlator_mem_acct_init (THIS, gfd_mt_end);
 
-        ctx->process_uuid = generate_uuid ();
+        ctx->process_uuid = generate_glusterfs_ctx_id ();
         if (!ctx->process_uuid) {
                 gf_log ("", GF_LOG_CRITICAL,
                         "ERROR: glusterfs uuid generation failed");
diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index d09cafc6868..cd7045277ba 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -2150,3 +2150,36 @@ _gf_timestuff (gf_timefmts *fmt, const char ***fmts, const char ***zeros)
         *zeros = __gf_zerotimes;
 }
 
+
+char *
+generate_glusterfs_ctx_id (void)
+{
+        char           tmp_str[1024] = {0,};
+        char           hostname[256] = {0,};
+        struct timeval tv = {0,};
+        char           now_str[32];
+
+        if (gettimeofday (&tv, NULL) == -1) {
+                gf_log ("glusterfsd", GF_LOG_ERROR,
+                        "gettimeofday: failed %s",
+                        strerror (errno));
+        }
+
+        if (gethostname (hostname, 256) == -1) {
+                gf_log ("glusterfsd", GF_LOG_ERROR,
+                        "gethostname: failed %s",
+                        strerror (errno));
+        }
+
+        gf_time_fmt (now_str, sizeof now_str, tv.tv_sec, gf_timefmt_Ymd_T);
+        snprintf (tmp_str, sizeof tmp_str, "%s-%d-%s:%"
+#ifdef GF_DARWIN_HOST_OS
+                  PRId32,
+#else
+                  "ld",
+#endif
+                  hostname, getpid(), now_str, tv.tv_usec);
+
+        return gf_strdup (tmp_str);
+}
+
diff --git a/libglusterfs/src/common-utils.h b/libglusterfs/src/common-utils.h
index 26af45fcc7b..f21ade40b8f 100644
--- a/libglusterfs/src/common-utils.h
+++ b/libglusterfs/src/common-utils.h
@@ -552,4 +552,6 @@ void gf_path_strip_trailing_slashes (char *path);
 uint64_t get_mem_size ();
 int gf_strip_whitespace (char *str, int len);
 int gf_canonicalize_path (char *path);
+char *generate_glusterfs_ctx_id (void);
+
 #endif /* _COMMON_UTILS_H */