mgmt/gluster: Handle tier brick volgen

        Backport of http://review.gluster.org/#/c/12595/

Index xlator watches only some xattrs based on type of volume. i.e.
disperse/afr. When the volume becomes tiered then index is not adding these
options in the volfile leading to no maintenance of indices. Thus no
proactive self-heals. With this fix, we write brick volfiles considering
the type of volume they belong to.

Change-Id: Ibe8f2d4ad5cb350306ab7ca0753e0f9a40b96a26
BUG: 1283756
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/12595
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaushal M <kaushal@redhat.com>
Signed-off-by: Anuradha Talur <atalur@redhat.com>
Reviewed-on: http://review.gluster.org/12847

3 files changed, 128 insertions, 45 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index 7676513cc50..df5ac17242b 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -98,6 +98,79 @@ extern struct volopt_map_entry glusterd_volopt_map[];
 
 static glusterd_lock_t lock;
 
+static int
+_brick_for_each (glusterd_volinfo_t *volinfo, dict_t *mod_dict,
+                         void *data,
+               int (*fn) (glusterd_volinfo_t *, glusterd_brickinfo_t *,
+                          dict_t *mod_dict, void *))
+{
+        int                  ret        = 0;
+        glusterd_brickinfo_t *brickinfo = NULL;
+        xlator_t             *this = THIS;
+
+        cds_list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
+                gf_msg_debug (this->name, 0, "Found a brick - %s:%s",
+                              brickinfo->hostname, brickinfo->path);
+                ret = fn (volinfo, brickinfo, mod_dict, data);
+                if (ret)
+                        goto out;
+        }
+out:
+        return ret;
+}
+
+int
+glusterd_volume_brick_for_each (glusterd_volinfo_t *volinfo, void *data,
+               int (*fn) (glusterd_volinfo_t *, glusterd_brickinfo_t *,
+                          dict_t *mod_dict, void *))
+{
+        dict_t             *mod_dict    = NULL;
+        glusterd_volinfo_t *dup_volinfo = NULL;
+        int                ret          = 0;
+
+        if (volinfo->type != GF_CLUSTER_TYPE_TIER) {
+                ret = _brick_for_each (volinfo, NULL, data, fn);
+                if (ret)
+                        goto out;
+        } else {
+                ret = glusterd_create_sub_tier_volinfo (volinfo, &dup_volinfo,
+                                                        _gf_true,
+                                                        volinfo->volname);
+                if (ret)
+                        goto out;
+
+                mod_dict = dict_new();
+                if (!mod_dict) {
+                        ret = -1;
+                        goto out;
+                }
+
+                ret = dict_set_str (mod_dict, "hot-brick", "on");
+                if (ret)
+                        goto out;
+
+                ret = _brick_for_each (dup_volinfo, mod_dict, data, fn);
+                if (ret)
+                        goto out;
+                GF_FREE (dup_volinfo);
+                dup_volinfo = NULL;
+                ret = glusterd_create_sub_tier_volinfo (volinfo, &dup_volinfo,
+                                                        _gf_false,
+                                                        volinfo->volname);
+                if (ret)
+                        goto out;
+                ret = _brick_for_each (dup_volinfo, NULL, data, fn);
+                if (ret)
+                        goto out;
+        }
+out:
+        if (dup_volinfo)
+                glusterd_volinfo_delete (dup_volinfo);
+
+        if (mod_dict)
+                dict_unref (mod_dict);
+        return ret;
+}
 
 int32_t
 glusterd_get_lock_owner (uuid_t *uuid)
@@ -654,6 +727,7 @@ glusterd_create_sub_tier_volinfo (glusterd_volinfo_t *volinfo,
                 return ret;
         }
 
+        gf_uuid_copy ((*dup_volinfo)->volume_id, volinfo->volume_id);
         (*dup_volinfo)->is_snap_volume   = volinfo->is_snap_volume;
         (*dup_volinfo)->status           = volinfo->status;
         (*dup_volinfo)->snapshot         = volinfo->snapshot;
diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.h b/xlators/mgmt/glusterd/src/glusterd-utils.h
index d0fce5efb89..99225c674eb 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.h
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.h
@@ -688,4 +688,8 @@ glusterd_disallow_op_for_tier (glusterd_volinfo_t *volinfo, glusterd_op_t op,
 int32_t
 glusterd_count_connected_peers (int32_t *count);
 
+int
+glusterd_volume_brick_for_each (glusterd_volinfo_t *volinfo, void *data,
+               int (*fn) (glusterd_volinfo_t *, glusterd_brickinfo_t *,
+                          dict_t *mod_dict, void *));
 #endif
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c
index 0bad4bd144f..988c6053d41 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c
@@ -41,6 +41,11 @@
 #include "glusterd-svc-helper.h"
 #include "glusterd-snapd-svc-helper.h"
 
+struct gd_validate_reconf_opts {
+        dict_t *options;
+        char   **op_errstr;
+};
+
 extern struct volopt_map_entry glusterd_volopt_map[];
 
 #define RPC_SET_OPT(XL, CLI_OPT, XLATOR_OPT, ERROR_CMD) do {            \
@@ -1682,8 +1687,8 @@ brick_graph_add_changetimerecorder (volgen_graph_t *graph,
         char                 *brickname     = NULL;
         char                 *path          = NULL;
         char                 *volname       = NULL;
-        int                   bricknum      = 0;
         char     index_basepath[PATH_MAX]   = {0};
+        char                 *hotbrick      = NULL;
 
         if (!graph || !volinfo || !set_dict || !brickinfo)
                 goto out;
@@ -1698,18 +1703,12 @@ brick_graph_add_changetimerecorder (volgen_graph_t *graph,
         if (ret)
                 goto out;
 
-        bricknum = 0;
-        cds_list_for_each_entry_safe (brickiter, tmp, &volinfo->bricks,
-                                      brick_list) {
-                if (brickiter == brickinfo)
-                        break;
-                bricknum++;
-        }
-        if (bricknum < volinfo->tier_info.hot_brick_count) {
-                ret = xlator_set_option (xl, "hot-brick", "on");
-        } else {
-                ret = xlator_set_option (xl, "hot-brick", "off");
-        }
+        if (!set_dict || dict_get_str (set_dict, "hot-brick", &hotbrick))
+                hotbrick = "off";
+
+        ret = xlator_set_option (xl, "hot-brick", hotbrick);
+        if (ret)
+                goto out;
 
         brickname = strrchr(path, '/') + 1;
         snprintf (index_basepath, sizeof (index_basepath), "%s.db",
@@ -4884,7 +4883,8 @@ out:
 
 static int
 glusterd_generate_brick_volfile (glusterd_volinfo_t *volinfo,
-                                 glusterd_brickinfo_t *brickinfo)
+                                 glusterd_brickinfo_t *brickinfo,
+                                 dict_t *mod_dict, void *data)
 {
         volgen_graph_t graph = {0,};
         char    filename[PATH_MAX] = {0,};
@@ -4895,7 +4895,7 @@ glusterd_generate_brick_volfile (glusterd_volinfo_t *volinfo,
 
         get_brick_filepath (filename, volinfo, brickinfo);
 
-        ret = build_server_graph (&graph, volinfo, NULL, brickinfo);
+        ret = build_server_graph (&graph, volinfo, mod_dict, brickinfo);
         if (!ret)
                 ret = volgen_write_volfile (&graph, filename);
 
@@ -5104,16 +5104,10 @@ generate_brick_volfiles (glusterd_volinfo_t *volinfo)
                 }
         }
 
-        cds_list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
-                gf_msg_debug (this->name, 0,
-                        "Found a brick - %s:%s", brickinfo->hostname,
-                        brickinfo->path);
-
-                ret = glusterd_generate_brick_volfile (volinfo, brickinfo);
-                if (ret)
-                        goto out;
-
-        }
+        ret = glusterd_volume_brick_for_each (volinfo, NULL,
+                                              glusterd_generate_brick_volfile);
+        if (ret)
+                goto out;
 
         ret = 0;
 
@@ -5671,7 +5665,7 @@ glusterd_create_rb_volfiles (glusterd_volinfo_t *volinfo,
 {
         int ret = -1;
 
-        ret = glusterd_generate_brick_volfile (volinfo, brickinfo);
+        ret = glusterd_generate_brick_volfile (volinfo, brickinfo, NULL, NULL);
         if (!ret)
                 ret = generate_client_volfiles (volinfo, GF_CLIENT_TRUSTED);
         if (!ret)
@@ -5880,23 +5874,42 @@ validate_clientopts (glusterd_volinfo_t *volinfo,
 
 int
 validate_brickopts (glusterd_volinfo_t *volinfo,
-                    glusterd_brickinfo_t *brickinfo,
-                    dict_t *val_dict,
-                    char **op_errstr)
+                    glusterd_brickinfo_t *brickinfo, dict_t *mod_dict,
+                    void *reconf)
 {
-        volgen_graph_t graph = {0,};
-        int            ret   = -1;
+        volgen_graph_t                 graph        = {0,};
+        int                            ret          = -1;
+        struct gd_validate_reconf_opts *brickreconf = reconf;
+        dict_t                         *val_dict    = brickreconf->options;
+        char                           **op_errstr  = brickreconf->op_errstr;
+        dict_t                         *full_dict   = NULL;
 
         GF_ASSERT (volinfo);
 
         graph.errstr = op_errstr;
+        full_dict = dict_new();
+        if (!full_dict) {
+                ret = -1;
+                goto out;
+        }
+
+        if (mod_dict)
+                dict_copy (mod_dict, full_dict);
+
+        if (val_dict)
+                dict_copy (val_dict, full_dict);
+
 
-        ret = build_server_graph (&graph, volinfo, val_dict, brickinfo);
+        ret = build_server_graph (&graph, volinfo, full_dict, brickinfo);
         if (!ret)
                 ret = graph_reconf_validateopt (&graph.graph, op_errstr);
 
         volgen_graph_free (&graph);
 
+out:
+        if (full_dict)
+                dict_unref (full_dict);
+
         gf_msg_debug ("glusterd", 0, "Returning %d", ret);
         return ret;
 }
@@ -5908,20 +5921,12 @@ glusterd_validate_brickreconf (glusterd_volinfo_t *volinfo,
 {
         glusterd_brickinfo_t *brickinfo = NULL;
         int                   ret = -1;
+        struct gd_validate_reconf_opts brickreconf = {0};
 
-        cds_list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
-                gf_msg_debug ("glusterd", 0,
-                        "Validating %s", brickinfo->hostname);
-
-                ret = validate_brickopts (volinfo, brickinfo, val_dict,
-                                          op_errstr);
-                if (ret)
-                        goto out;
-        }
-
-        ret = 0;
-
-out:
+        brickreconf.options = val_dict;
+        brickreconf.op_errstr = op_errstr;
+        ret = glusterd_volume_brick_for_each (volinfo, &brickreconf,
+                                              validate_brickopts);
         return ret;
 }