glusterd: Fix snapshot of a volume with geo-rep

Problem:
    Snapshot fails for a volume configured with geo-rep
    if geo-rep is created with root user with the following
    syntax.
    gluster vol geo-rep <master_vol> root@<slave_host>::<slave_vol>

    It works fine if created with following syntax.
    gluster vol geo-rep <master_vol> <slave_host>::<slave_vol>

Cause:
    Geo-rep maintains persistent dictionary of slave associated
    with master volume. The dictionary saves the slave info
    along with 'root@' as sent from cli.
    Snapshot while constructing the working dir path to copy
    configuration files, constructs using this dictionary.
    But the actual working dir is created with out considering
    'root@'. Hence the issue.

Fix:
    Fix is done at two layers.
    1. Parse and negelect 'root@' in cli itself.
    2. For existing geo-rep sessions and upgrade scenarios,
       parse and neglect 'root@' in snapshot code as well.

Change-Id: If4e04f7f776ef71df4dd1e7e053ef75db98762b2
BUG: 1231789
Signed-off-by: Kotresh HR <khiremat@redhat.com>
Reviewed-on: http://review.gluster.org/11233
Reviewed-by: Avra Sengupta <asengupt@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>

1 files changed, 20 insertions, 2 deletions

diff --git a/cli/src/cli-cmd-parser.c b/cli/src/cli-cmd-parser.c
index f0f428a795b..a243a3542e9 100644
--- a/cli/src/cli-cmd-parser.c
+++ b/cli/src/cli-cmd-parser.c
@@ -2422,6 +2422,9 @@ cli_cmd_gsync_set_parse (const char **words, int wordcount, dict_t **options)
                                           "push-pem", "detail", "pause",
                                           "resume", NULL };
         char               *w = NULL;
+        char               *save_ptr   = NULL;
+        char               *slave_temp = NULL;
+        char               *token      = NULL;
 
         GF_ASSERT (words);
         GF_ASSERT (options);
@@ -2578,14 +2581,29 @@ cli_cmd_gsync_set_parse (const char **words, int wordcount, dict_t **options)
                         ret = dict_set_str (dict, "volname",
                                             (char *)words[masteri]);
         }
-        if (!ret && slavei)
-                ret = dict_set_str (dict, "slave", (char *)words[slavei]);
+        if (!ret && slavei) {
+                /* If geo-rep is created with root user using the syntax
+                 * gluster vol geo-rep <mastervol> root@<slavehost> ...
+                 * pass down only <slavehost> else pass as it is.
+                 */
+                slave_temp = gf_strdup (words[slavei]);
+                token = strtok_r (slave_temp, "@", &save_ptr);
+                if (token && !strcmp (token, "root")) {
+                        ret = dict_set_str (dict, "slave",
+                                            (char *)words[slavei]+5);
+                } else {
+                        ret = dict_set_str (dict, "slave",
+                                            (char *)words[slavei]);
+                }
+        }
         if (!ret)
                 ret = dict_set_int32 (dict, "type", type);
         if (!ret && type == GF_GSYNC_OPTION_TYPE_CONFIG)
                 ret = config_parse (words, wordcount, dict, cmdi, glob);
 
 out:
+        if (slave_temp)
+                GF_FREE (slave_temp);
         if (ret) {
                 if (dict)
                         dict_destroy (dict);