glusterd: group server-quorum related code together

Server-quorum implementation was spread in many files.  This patch
brings them all together into a single file, namely
glusterd-server-quorum.c. All exported functions are available via
glusterd-server-quorum.h

Change-Id: I8fd77114b5bc6b05127cb8a6a641e0295f0be7bb
BUG: 1205592
Signed-off-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-on: http://review.gluster.org/9492
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaushal M <kaushal@redhat.com>

1 files changed, 0 insertions, 403 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-utils.c b/xlators/mgmt/glusterd/src/glusterd-utils.c
index 65bd4044164..3195110ece6 100644
--- a/xlators/mgmt/glusterd/src/glusterd-utils.c
+++ b/xlators/mgmt/glusterd/src/glusterd-utils.c
@@ -93,8 +93,6 @@
 #define NLMV4_VERSION       4
 #define NLMV1_VERSION       1
 
-#define CEILING_POS(X) (((X)-(int)(X)) > 0 ? (int)((X)+1) : (int)(X))
-
 extern struct volopt_map_entry glusterd_volopt_map[];
 
 static glusterd_lock_t lock;
@@ -1106,106 +1104,6 @@ out:
 }
 #endif
 
-gf_boolean_t
-glusterd_is_get_op (xlator_t *this, glusterd_op_t op, dict_t *dict)
-{
-        char            *key = NULL;
-        char            *volname = NULL;
-        int             ret = 0;
-
-        if (op == GD_OP_STATUS_VOLUME)
-                return _gf_true;
-
-        if (op == GD_OP_SET_VOLUME) {
-                /*check for set volume help*/
-                ret = dict_get_str (dict, "volname", &volname);
-                if (volname &&
-                    ((strcmp (volname, "help") == 0) ||
-                     (strcmp (volname, "help-xml") == 0))) {
-                        ret = dict_get_str (dict, "key1", &key);
-                        if (ret < 0)
-                                return _gf_true;
-                }
-        }
-        return _gf_false;
-}
-
-gf_boolean_t
-glusterd_is_quorum_validation_required (xlator_t *this, glusterd_op_t op,
-                                        dict_t *dict)
-{
-        gf_boolean_t    required = _gf_true;
-        char            *key = NULL;
-        char            *key_fixed = NULL;
-        int             ret = -1;
-
-        if (glusterd_is_get_op (this, op, dict)) {
-                required = _gf_false;
-                goto out;
-        }
-        if ((op != GD_OP_SET_VOLUME) && (op != GD_OP_RESET_VOLUME))
-                goto out;
-        if (op == GD_OP_SET_VOLUME)
-                ret = dict_get_str (dict, "key1", &key);
-        else if (op == GD_OP_RESET_VOLUME)
-                ret = dict_get_str (dict, "key", &key);
-        if (ret)
-                goto out;
-        ret = glusterd_check_option_exists (key, &key_fixed);
-        if (ret <= 0)
-                goto out;
-        if (key_fixed)
-                key = key_fixed;
-        if (glusterd_is_quorum_option (key))
-                required = _gf_false;
-out:
-        GF_FREE (key_fixed);
-        return required;
-}
-
-/* This function should not be used when the quorum validation needs to happen
- * on non-global peer list */
-int
-glusterd_validate_quorum (xlator_t *this, glusterd_op_t op,
-                             dict_t *dict, char **op_errstr)
-{
-        int                      ret     = 0;
-        char                    *volname = NULL;
-        glusterd_volinfo_t      *volinfo = NULL;
-        char                    *errstr  = NULL;
-
-        errstr = "Quorum not met. Volume operation not allowed.";
-        if (!glusterd_is_quorum_validation_required (this, op, dict))
-                goto out;
-
-        ret = dict_get_str (dict, "volname", &volname);
-        if (ret) {
-                ret = 0;
-                goto out;
-        }
-
-        ret = glusterd_volinfo_find (volname, &volinfo);
-        if (ret) {
-                ret = 0;
-                goto out;
-        }
-
-        /* Passing NULL implies quorum calculation will happen on global peer
-         * list */
-        if (does_gd_meet_server_quorum (this, NULL, _gf_false)) {
-                ret = 0;
-                goto out;
-        }
-
-        if (glusterd_is_volume_in_server_quorum (volinfo)) {
-                ret = -1;
-                *op_errstr = gf_strdup (errstr);
-                goto out;
-        }
-        ret = 0;
-out:
-        return ret;
-}
 
 int
 glusterd_validate_and_create_brickpath (glusterd_brickinfo_t *brickinfo,
@@ -2823,205 +2721,6 @@ out:
 
 }
 
-gf_boolean_t
-glusterd_is_quorum_option (char *option)
-{
-        gf_boolean_t    res = _gf_false;
-        int             i = 0;
-        char            *keys[] = {GLUSTERD_QUORUM_TYPE_KEY,
-                                   GLUSTERD_QUORUM_RATIO_KEY, NULL};
-
-        for (i = 0; keys[i]; i++) {
-                if (strcmp (option, keys[i]) == 0) {
-                        res = _gf_true;
-                        break;
-                }
-        }
-        return res;
-}
-
-gf_boolean_t
-glusterd_is_quorum_changed (dict_t *options, char *option, char *value)
-{
-        int             ret = 0;
-        gf_boolean_t    reconfigured = _gf_false;
-        gf_boolean_t    all = _gf_false;
-        char            *oldquorum = NULL;
-        char            *newquorum = NULL;
-        char            *oldratio = NULL;
-        char            *newratio = NULL;
-
-        if ((strcmp ("all", option) != 0) &&
-            !glusterd_is_quorum_option (option))
-                goto out;
-
-        if (strcmp ("all", option) == 0)
-                all = _gf_true;
-
-        if (all || (strcmp (GLUSTERD_QUORUM_TYPE_KEY, option) == 0)) {
-                newquorum = value;
-                ret = dict_get_str (options, GLUSTERD_QUORUM_TYPE_KEY,
-                                    &oldquorum);
-        }
-
-        if (all || (strcmp (GLUSTERD_QUORUM_RATIO_KEY, option) == 0)) {
-                newratio = value;
-                ret = dict_get_str (options, GLUSTERD_QUORUM_RATIO_KEY,
-                                    &oldratio);
-        }
-
-        reconfigured = _gf_true;
-
-        if (oldquorum && newquorum && (strcmp (oldquorum, newquorum) == 0))
-                reconfigured = _gf_false;
-        if (oldratio && newratio && (strcmp (oldratio, newratio) == 0))
-                reconfigured = _gf_false;
-
-        if ((oldratio == NULL) && (newratio == NULL) && (oldquorum == NULL) &&
-            (newquorum == NULL))
-                reconfigured = _gf_false;
-out:
-        return reconfigured;
-}
-
-static inline gf_boolean_t
-_is_contributing_to_quorum (gd_quorum_contrib_t contrib)
-{
-        if ((contrib == QUORUM_UP) || (contrib == QUORUM_DOWN))
-                return _gf_true;
-        return _gf_false;
-}
-
-static inline gf_boolean_t
-_does_quorum_meet (int active_count, int quorum_count)
-{
-        return (active_count >= quorum_count);
-}
-
-int
-glusterd_get_quorum_cluster_counts (xlator_t *this, int *active_count,
-                                    int *quorum_count,
-                                    struct cds_list_head *peer_list,
-                                    gf_boolean_t _local_xaction_peers)
-{
-        glusterd_peerinfo_t *peerinfo      = NULL;
-        glusterd_conf_t     *conf          = NULL;
-        int                 ret            = -1;
-        int                 inquorum_count = 0;
-        char                *val           = NULL;
-        double              quorum_percentage = 0.0;
-        gf_boolean_t        ratio          = _gf_false;
-        int                 count          = 0;
-
-        conf = this->private;
-
-        //Start with counting self
-        inquorum_count = 1;
-        if (active_count)
-                *active_count = 1;
-
-        rcu_read_lock ();
-        if (!peer_list) {
-                cds_list_for_each_entry_rcu (peerinfo, &conf->peers,
-                                             uuid_list) {
-                        GLUSTERD_QUORUM_COUNT(peerinfo, inquorum_count,
-                                                active_count, out);
-                }
-        } else {
-                if (_local_xaction_peers) {
-                        list_for_each_local_xaction_peers (peerinfo,
-                                                           peer_list) {
-                                GLUSTERD_QUORUM_COUNT(peerinfo, inquorum_count,
-                                                      active_count, out);
-                        }
-                } else {
-                        cds_list_for_each_entry (peerinfo, peer_list,
-                                                 op_peers_list) {
-                                GLUSTERD_QUORUM_COUNT(peerinfo, inquorum_count,
-                                                      active_count, out);
-                        }
-                }
-        }
-        ret = dict_get_str (conf->opts, GLUSTERD_QUORUM_RATIO_KEY, &val);
-        if (ret == 0) {
-                ratio = _gf_true;
-                ret = gf_string2percent (val, &quorum_percentage);
-                if (!ret)
-                        ratio = _gf_true;
-        }
-        if (ratio)
-                count = CEILING_POS (inquorum_count *
-                                     quorum_percentage / 100.0);
-        else
-                count = (inquorum_count * 50 / 100) + 1;
-
-        *quorum_count = count;
-        ret = 0;
-out:
-        rcu_read_unlock ();
-
-        return ret;
-}
-
-gf_boolean_t
-glusterd_is_volume_in_server_quorum (glusterd_volinfo_t *volinfo)
-{
-        gf_boolean_t    res = _gf_false;
-        char            *quorum_type = NULL;
-        int             ret = 0;
-
-        ret = dict_get_str (volinfo->dict, GLUSTERD_QUORUM_TYPE_KEY,
-                            &quorum_type);
-        if (ret)
-                goto out;
-
-        if (strcmp (quorum_type, GLUSTERD_SERVER_QUORUM) == 0)
-                res = _gf_true;
-out:
-        return res;
-}
-
-gf_boolean_t
-glusterd_is_any_volume_in_server_quorum (xlator_t *this)
-{
-        glusterd_conf_t         *conf = NULL;
-        glusterd_volinfo_t      *volinfo = NULL;
-
-        conf = this->private;
-        cds_list_for_each_entry (volinfo, &conf->volumes, vol_list) {
-                if (glusterd_is_volume_in_server_quorum (volinfo)) {
-                        return _gf_true;
-                }
-        }
-        return _gf_false;
-}
-
-gf_boolean_t
-does_gd_meet_server_quorum (xlator_t *this, struct cds_list_head *peers_list,
-                            gf_boolean_t _local_xaction_peers)
-{
-        int                     quorum_count = 0;
-        int                     active_count   = 0;
-        gf_boolean_t            in = _gf_false;
-        glusterd_conf_t         *conf = NULL;
-        int                     ret = -1;
-
-        conf = this->private;
-        ret = glusterd_get_quorum_cluster_counts (this, &active_count,
-                                                  &quorum_count,
-                                                  peers_list,
-                                                  _local_xaction_peers);
-        if (ret)
-                goto out;
-
-        if (!_does_quorum_meet (active_count, quorum_count)) {
-                goto out;
-        }
-
-        in = _gf_true;
-out:
-        return in;
-}
 
 int
 glusterd_spawn_daemons (void *opaque)
@@ -3041,108 +2740,6 @@ glusterd_spawn_daemons (void *opaque)
         return ret;
 }
 
-void
-glusterd_do_volume_quorum_action (xlator_t *this, glusterd_volinfo_t *volinfo,
-                                  gf_boolean_t meets_quorum)
-{
-        glusterd_brickinfo_t *brickinfo     = NULL;
-        glusterd_conf_t      *conf          = NULL;
-        gd_quorum_status_t   quorum_status  = NOT_APPLICABLE_QUORUM;
-        gf_boolean_t         follows_quorum = _gf_false;
-
-        conf = this->private;
-        if (volinfo->status != GLUSTERD_STATUS_STARTED) {
-                volinfo->quorum_status = NOT_APPLICABLE_QUORUM;
-                goto out;
-        }
-
-        follows_quorum = glusterd_is_volume_in_server_quorum (volinfo);
-        if (follows_quorum) {
-                if (meets_quorum)
-                        quorum_status = MEETS_QUORUM;
-                else
-                        quorum_status = DOESNT_MEET_QUORUM;
-        } else {
-                quorum_status = NOT_APPLICABLE_QUORUM;
-        }
-
-        /*
-         * The following check is added to prevent spurious brick starts when
-         * events occur that affect quorum.
-         * Example:
-         * There is a cluster of 10 peers. Volume is in quorum. User
-         * takes down one brick from the volume to perform maintenance.
-         * Suddenly one of the peers go down. Cluster is still in quorum. But
-         * because of this 'peer going down' event, quorum is calculated and
-         * the bricks that are down are brought up again. In this process it
-         * also brings up the brick that is purposefully taken down.
-         */
-        if (volinfo->quorum_status == quorum_status)
-                goto out;
-
-        if (quorum_status == MEETS_QUORUM) {
-                gf_msg (this->name, GF_LOG_CRITICAL, 0,
-                        GD_MSG_SERVER_QUORUM_MET_STARTING_BRICKS,
-                        "Server quorum regained for volume %s. Starting local "
-                        "bricks.", volinfo->volname);
-        } else if (quorum_status == DOESNT_MEET_QUORUM) {
-                gf_msg (this->name, GF_LOG_CRITICAL, 0,
-                        GD_MSG_SERVER_QUORUM_LOST_STOPPING_BRICKS,
-                        "Server quorum lost for volume %s. Stopping local "
-                        "bricks.", volinfo->volname);
-        }
-
-        cds_list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
-                if (!glusterd_is_local_brick (this, volinfo, brickinfo))
-                        continue;
-                if (quorum_status == DOESNT_MEET_QUORUM)
-                        glusterd_brick_stop (volinfo, brickinfo, _gf_false);
-                else
-                        glusterd_brick_start (volinfo, brickinfo, _gf_false);
-        }
-        volinfo->quorum_status = quorum_status;
-out:
-        return;
-}
-
-int
-glusterd_do_quorum_action ()
-{
-        xlator_t            *this          = NULL;
-        glusterd_conf_t     *conf          = NULL;
-        glusterd_volinfo_t  *volinfo       = NULL;
-        int                 ret            = 0;
-        int                 active_count   = 0;
-        int                 quorum_count   = 0;
-        gf_boolean_t        meets          = _gf_false;
-
-        this = THIS;
-        conf = this->private;
-
-        conf->pending_quorum_action = _gf_true;
-        ret = glusterd_lock (conf->uuid);
-        if (ret)
-                goto out;
-
-        {
-                ret = glusterd_get_quorum_cluster_counts (this, &active_count,
-                                                          &quorum_count, NULL,
-                                                          _gf_false);
-                if (ret)
-                        goto unlock;
-
-                if (_does_quorum_meet (active_count, quorum_count))
-                        meets = _gf_true;
-                cds_list_for_each_entry (volinfo, &conf->volumes, vol_list) {
-                        glusterd_do_volume_quorum_action (this, volinfo, meets);
-                }
-        }
-unlock:
-        (void)glusterd_unlock (conf->uuid);
-        conf->pending_quorum_action = _gf_false;
-out:
-        return ret;
-}
 
 int32_t
 glusterd_import_friend_volume_opts (dict_t *peer_data, int count,