glusterd/mountbroker: enhance mountbroker-geo-replication.* option to take multiple volumes

Comma can be used in the value of a "mountbroker-geo-replication.*" option
with semantics as of these examples:

  option mountbroker-geo-replication.foolabel vol1,vol2,vol3:geouser

and

  option mountbroker-geo-replication.geouser vol1,vol2,vol3

will allow geouser to mount any of the volumes vol{1,2,3} with params of a
geo-rep aux mount under label foolabel, resp. geouser

Also fix memleak in parsing of this option.

Change-Id: I5311388812f503a078a52a14f2679f5ddb33b248
BUG: 765214
Signed-off-by: Csaba Henk <csaba@redhat.com>
Reviewed-on: http://review.gluster.com/2818
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amarts@redhat.com>
Reviewed-by: Venky Shankar <vshankar@redhat.com>

2 files changed, 63 insertions, 9 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-mem-types.h b/xlators/mgmt/glusterd/src/glusterd-mem-types.h
index 3bb446d1a..0ef904c7c 100644
--- a/xlators/mgmt/glusterd/src/glusterd-mem-types.h
+++ b/xlators/mgmt/glusterd/src/glusterd-mem-types.h
@@ -70,9 +70,10 @@ typedef enum gf_gld_mem_types_ {
         gf_gld_mt_mount_comp_container          = gf_common_mt_end + 44,
         gf_gld_mt_mount_component               = gf_common_mt_end + 45,
         gf_gld_mt_mount_spec                    = gf_common_mt_end + 46,
-        gf_gld_mt_nodesrv_t                     = gf_common_mt_end + 47,
-        gf_gld_mt_charptr                       = gf_common_mt_end + 48,
-        gf_gld_mt_end                           = gf_common_mt_end + 49,
+        gf_gld_mt_georep_meet_spec              = gf_common_mt_end + 47,
+        gf_gld_mt_nodesrv_t                     = gf_common_mt_end + 48,
+        gf_gld_mt_charptr                       = gf_common_mt_end + 49,
+        gf_gld_mt_end                           = gf_common_mt_end + 50,
 } gf_gld_mem_types_t;
 #endif
 
diff --git a/xlators/mgmt/glusterd/src/glusterd-mountbroker.c b/xlators/mgmt/glusterd/src/glusterd-mountbroker.c
index 4bd062c14..14cbb3d5d 100644
--- a/xlators/mgmt/glusterd/src/glusterd-mountbroker.c
+++ b/xlators/mgmt/glusterd/src/glusterd-mountbroker.c
@@ -244,12 +244,15 @@ const char *georep_mnt_desc_template =
                 "xlator-option=\\*-dht.assert-no-child-down=true "
                 "volfile-server=localhost "
                 "client-pid=%d "
-                "volfile-id=%s "
                 "user-map-root=%s "
         ")"
         "SUB+("
                 "log-file="DEFAULT_LOG_FILE_DIRECTORY"/"GEOREP"*/* "
                 "log-level=* "
+                "volfile-id=* "
+        ")"
+        "MEET("
+                "%s"
         ")";
 
 const char *hadoop_mnt_desc_template =
@@ -265,18 +268,68 @@ const char *hadoop_mnt_desc_template =
         ")";
 
 int
-make_georep_mountspec (gf_mount_spec_t *mspec, const char *volname,
+make_georep_mountspec (gf_mount_spec_t *mspec, const char *volnames,
                        char *user)
 {
         char *georep_mnt_desc = NULL;
+        char *meetspec        = NULL;
+        char *vols            = NULL;
+        char *vol             = NULL;
+        char *p               = NULL;
+        char *fa[3]           = {0,};
+        size_t siz            = 0;
+        int vc                = 0;
+        int i                 = 0;
         int ret               = 0;
 
+        vols = gf_strdup ((char *)volnames);
+        if (!vols)
+                goto out;
+
+        for (vc = 1, p = vols; *p; p++) {
+                if (*p == ',')
+                        vc++;
+        }
+        siz = strlen (volnames) + vc * strlen("volfile-id=");
+        meetspec = GF_CALLOC (1, siz + 1, gf_gld_mt_georep_meet_spec);
+        if (!meetspec)
+                goto out;
+
+        for (p = vols;;) {
+                vol = strtok (p, ",");
+                if (!vol) {
+                        GF_ASSERT (vc == 0);
+                        break;
+                }
+                p = NULL;
+                strcat (meetspec, "volfile-id=");
+                strcat (meetspec, vol);
+                if (--vc > 0)
+                        strcat (meetspec, " ");
+        }
+
         ret = gf_asprintf (&georep_mnt_desc, georep_mnt_desc_template,
-                           GF_CLIENT_PID_GSYNCD, volname, user);
-        if (ret == -1)
-                return ret;
+                           GF_CLIENT_PID_GSYNCD, user, meetspec);
+        if (ret == -1) {
+                georep_mnt_desc = NULL;
+                goto out;
+        }
+
+        ret = parse_mount_pattern_desc (mspec, georep_mnt_desc);
+
+ out:
+        fa[0] = meetspec;
+        fa[1] = vols;
+        fa[2] = georep_mnt_desc;
+
+        for (i = 0; i < 3; i++) {
+                if (fa[i])
+                        GF_FREE (fa[i]);
+                else
+                        ret = -1;
+        }
 
-        return parse_mount_pattern_desc (mspec, georep_mnt_desc);
+        return ret;
 }
 
 int