mgmt/glusterd: add option to specify a different base-port

This is (arguably) a hack to work around a bug in libvirt which is not
well behaved wrt to using TCP ports in the unreserved space between
49152-65535. (See RFC 6335)

Normally glusterd starts and binds to the first available port in range,
usually 49152. libvirt's live migration also tries to use ports in this
range, but has no fallback to use (an)other port(s) when the one it wants
is already in use.

Change-Id: Id8fe35c08b6ce4f268d46804bbb6dddab7a6b7bb
BUG: 1018178
Signed-off-by: Kaleb S. KEITHLEY <kkeithle@redhat.com>
Reviewed-on: http://review.gluster.org/6210
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

4 files changed, 127 insertions, 117 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-pmap.c b/xlators/mgmt/glusterd/src/glusterd-pmap.c
index 9fdd782fe9e..a153ca1a947 100644
--- a/xlators/mgmt/glusterd/src/glusterd-pmap.c
+++ b/xlators/mgmt/glusterd/src/glusterd-pmap.c
@@ -1,5 +1,5 @@
 /*
-   Copyright (c) 2010-2012 Red Hat, Inc. <http://www.redhat.com>
+   Copyright (c) 2010-2013 Red Hat, Inc. <http://www.redhat.com>
    This file is part of GlusterFS.
 
    This file is licensed to you under your choice of the GNU Lesser
@@ -52,8 +52,8 @@ pmap_port_isfree (int port)
 }
 
 
-struct pmap_registry *
-pmap_registry_new (void)
+static struct pmap_registry *
+pmap_registry_new (xlator_t *this)
 {
         struct pmap_registry *pmap = NULL;
         int                   i = 0;
@@ -69,8 +69,8 @@ pmap_registry_new (void)
                         pmap->ports[i].type = GF_PMAP_PORT_FOREIGN;
         }
 
-        pmap->base_port = GF_IANA_PRIV_PORTS_START;
-        pmap->last_alloc = GF_IANA_PRIV_PORTS_START;
+        pmap->base_port = pmap->last_alloc =
+                ((glusterd_conf_t *)(this->private))->base_port;
 
         return pmap;
 }
@@ -86,7 +86,7 @@ pmap_registry_get (xlator_t *this)
 
         pmap = priv->pmap;
         if (!pmap) {
-                pmap = pmap_registry_new ();
+                pmap = pmap_registry_new (this);
                 if (!pmap)
                         return NULL;
                 priv->pmap = pmap;
diff --git a/xlators/mgmt/glusterd/src/glusterd-store.c b/xlators/mgmt/glusterd/src/glusterd-store.c
index 57809f400b8..36e7d6508ef 100644
--- a/xlators/mgmt/glusterd/src/glusterd-store.c
+++ b/xlators/mgmt/glusterd/src/glusterd-store.c
@@ -1,5 +1,5 @@
 /*
-   Copyright (c) 2007-2012 Red Hat, Inc. <http://www.redhat.com>
+   Copyright (c) 2007-2013 Red Hat, Inc. <http://www.redhat.com>
    This file is part of GlusterFS.
 
    This file is licensed to you under your choice of the GNU Lesser
@@ -1513,7 +1513,7 @@ glusterd_store_retrieve_bricks (glusterd_volinfo_t *volinfo)
                                     strlen (GLUSTERD_STORE_KEY_BRICK_PORT))) {
                                 gf_string2int (value, &brickinfo->port);
 
-                                if (brickinfo->port < GF_IANA_PRIV_PORTS_START){
+                                if (brickinfo->port < priv->base_port) {
                                         /* This is required to adhere to the
                                            IANA standards */
                                         brickinfo->port = 0;
@@ -1529,8 +1529,7 @@ glusterd_store_retrieve_bricks (glusterd_volinfo_t *volinfo)
                                     strlen (GLUSTERD_STORE_KEY_BRICK_RDMA_PORT))) {
                                 gf_string2int (value, &brickinfo->rdma_port);
 
-                                if (brickinfo->rdma_port <
-                                    GF_IANA_PRIV_PORTS_START){
+                                if (brickinfo->rdma_port < priv->base_port) {
                                         /* This is required to adhere to the
                                            IANA standards */
                                         brickinfo->rdma_port = 0;
diff --git a/xlators/mgmt/glusterd/src/glusterd.c b/xlators/mgmt/glusterd/src/glusterd.c
index 7d38b9295e3..e4c4caee45c 100644
--- a/xlators/mgmt/glusterd/src/glusterd.c
+++ b/xlators/mgmt/glusterd/src/glusterd.c
@@ -1,5 +1,5 @@
 /*
-   Copyright (c) 2006-2012 Red Hat, Inc. <http://www.redhat.com>
+   Copyright (c) 2006-2013 Red Hat, Inc. <http://www.redhat.com>
    This file is part of GlusterFS.
 
    This file is licensed to you under your choice of the GNU Lesser
@@ -132,12 +132,12 @@ glusterd_uuid_init ()
         GF_ASSERT (this);
         priv = this->private;
 
-	ret = glusterd_retrieve_uuid ();
-	if (ret == 0) {
-		gf_log (this->name, GF_LOG_INFO,
-			"retrieved UUID: %s", uuid_utoa (priv->uuid));
-		return 0;
-	}
+        ret = glusterd_retrieve_uuid ();
+        if (ret == 0) {
+                gf_log (this->name, GF_LOG_INFO,
+                        "retrieved UUID: %s", uuid_utoa (priv->uuid));
+                return 0;
+        }
 
         ret = glusterd_uuid_generate_save ();
 
@@ -1101,7 +1101,7 @@ init (xlator_t *this)
         if ((ret != 0) && (ENOENT != errno)) {
                 gf_log (this->name, GF_LOG_ERROR,
                         "stat fails on %s, exiting. (errno = %d)",
-			workdir, errno);
+                        workdir, errno);
                 exit (1);
         }
 
@@ -1282,6 +1282,12 @@ init (xlator_t *this)
         if (ret)
                 goto out;
 
+         conf->base_port = GF_IANA_PRIV_PORTS_START;
+         if (dict_get_uint32(this->options, "base-port", &conf->base_port) == 0) {
+                 gf_log (this->name, GF_LOG_INFO,
+                         "base-port override: %d", conf->base_port);
+         }
+
         /* Set option to run bricks on valgrind if enabled in glusterd.vol */
         conf->valgrind = _gf_false;
         ret = dict_get_str (this->options, "run-with-valgrind", &valgrind_str);
@@ -1495,5 +1501,9 @@ struct volume_options options[] = {
           .description = "The socket file on which glusterd should listen for "
                         "cli requests. Default is "DEFAULT_GLUSTERD_SOCKFILE "."
         },
+        { .key = {"base-port"},
+          .type = GF_OPTION_TYPE_INT,
+          .description = "Sets the base port for portmap query"
+        },
         { .key   = {NULL} },
 };
diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
index dd71341dd64..ff9ca41f918 100644
--- a/xlators/mgmt/glusterd/src/glusterd.h
+++ b/xlators/mgmt/glusterd/src/glusterd.h
@@ -1,5 +1,5 @@
 /*
-   Copyright (c) 2006-2012 Red Hat, Inc. <http://www.redhat.com>
+   Copyright (c) 2006-2013 Red Hat, Inc. <http://www.redhat.com>
    This file is part of GlusterFS.
 
    This file is licensed to you under your choice of the GNU Lesser
@@ -112,8 +112,8 @@ struct glusterd_volgen {
 };
 
 typedef struct {
-        struct rpc_clnt         *rpc;
-        gf_boolean_t            online;
+        struct rpc_clnt  *rpc;
+        gf_boolean_t      online;
 } nodesrv_t;
 
 typedef struct {
@@ -123,38 +123,39 @@ typedef struct {
 } gd_global_opts_t;
 
 typedef struct {
-        struct _volfile_ctx *volfile;
-	pthread_mutex_t   mutex;
-	struct list_head  peers;
-	struct list_head  xaction_peers;
-        gf_boolean_t      verify_volfile_checksum;
-        gf_boolean_t      trace;
-        uuid_t            uuid;
-        char              workdir[PATH_MAX];
-        rpcsvc_t          *rpc;
-        nodesrv_t         *shd;
-        nodesrv_t         *nfs;
-        struct pmap_registry *pmap;
-        struct list_head  volumes;
-        pthread_mutex_t   xprt_lock;
-        struct list_head  xprt_list;
-        gf_store_handle_t *handle;
-        gf_timer_t *timer;
-        glusterd_sm_tr_log_t op_sm_log;
-        struct rpc_clnt_program *gfs_mgmt;
-
-        struct list_head mount_specs;
-        gf_boolean_t      valgrind;
-        pthread_t       brick_thread;
-        void           *hooks_priv;
+        struct _volfile_ctx      *volfile;
+        pthread_mutex_t           mutex;
+        struct list_head          peers;
+        struct list_head          xaction_peers;
+        gf_boolean_t              verify_volfile_checksum;
+        gf_boolean_t              trace;
+        uuid_t                    uuid;
+        char                      workdir[PATH_MAX];
+        rpcsvc_t                 *rpc;
+        nodesrv_t                *shd;
+        nodesrv_t                *nfs;
+        struct pmap_registry     *pmap;
+        struct list_head          volumes;
+        pthread_mutex_t           xprt_lock;
+        struct list_head          xprt_list;
+        gf_store_handle_t        *handle;
+        gf_timer_t               *timer;
+        glusterd_sm_tr_log_t      op_sm_log;
+        struct rpc_clnt_program  *gfs_mgmt;
+
+        struct list_head           mount_specs;
+        gf_boolean_t               valgrind;
+        pthread_t                  brick_thread;
+        void                      *hooks_priv;
         /* need for proper handshake_t */
-        int             op_version; /* Starts with 1 for 3.3.0 */
-        xlator_t       *xl;  /* Should be set to 'THIS' before creating thread */
-        gf_boolean_t   pending_quorum_action;
-        dict_t             *opts;
-        synclock_t      big_lock;
-        gf_boolean_t    restart_done;
-        rpcsvc_t        *uds_rpc; /* RPCSVC for the unix domain socket */
+        int                        op_version; /* Starts with 1 for 3.3.0 */
+        xlator_t                  *xl;  /* Should be set to 'THIS' before creating thread */
+        gf_boolean_t               pending_quorum_action;
+        dict_t                    *opts;
+        synclock_t                 big_lock;
+        gf_boolean_t               restart_done;
+        rpcsvc_t                  *uds_rpc; /* RPCSVC for the unix domain socket */
+        uint32_t                   base_port;
 } glusterd_conf_t;
 
 
@@ -164,18 +165,18 @@ typedef enum gf_brick_status {
 } gf_brick_status_t;
 
 struct glusterd_brickinfo {
-        char    hostname[1024];
-        char    path[PATH_MAX];
-        struct list_head  brick_list;
-        uuid_t  uuid;
-        int     port;
-        int     rdma_port;
-        char   *logfile;
-        gf_boolean_t signed_in;
+        char               hostname[1024];
+        char               path[PATH_MAX];
+        struct list_head   brick_list;
+        uuid_t             uuid;
+        int                port;
+        int                rdma_port;
+        char              *logfile;
+        gf_boolean_t       signed_in;
         gf_store_handle_t *shandle;
-        gf_brick_status_t status;
-        struct rpc_clnt *rpc;
-        int decommissioned;
+        gf_brick_status_t  status;
+        struct rpc_clnt   *rpc;
+        int                decommissioned;
 };
 
 typedef struct glusterd_brickinfo glusterd_brickinfo_t;
@@ -198,7 +199,7 @@ struct glusterd_defrag_info_ {
         int                          cmd;
         pthread_t                    th;
         gf_defrag_status_t           defrag_status;
-        struct rpc_clnt            * rpc;
+        struct rpc_clnt             *rpc;
         uint32_t                     connected;
         char                         mount[1024];
         char                         databuf[131072];
@@ -237,17 +238,17 @@ typedef enum glusterd_vol_backend_ {
 } glusterd_vol_backend_t;
 
 struct glusterd_rebalance_ {
-        gf_defrag_status_t      defrag_status;
-        uint64_t                rebalance_files;
-        uint64_t                rebalance_data;
-        uint64_t                lookedup_files;
-        uint64_t                skipped_files;
+        gf_defrag_status_t       defrag_status;
+        uint64_t                 rebalance_files;
+        uint64_t                 rebalance_data;
+        uint64_t                 lookedup_files;
+        uint64_t                 skipped_files;
         glusterd_defrag_info_t  *defrag;
-        gf_cli_defrag_type      defrag_cmd;
-        uint64_t                rebalance_failures;
-        uuid_t                  rebalance_id;
-        double                  rebalance_time;
-        glusterd_op_t           op;
+        gf_cli_defrag_type       defrag_cmd;
+        uint64_t                 rebalance_failures;
+        uuid_t                   rebalance_id;
+        double                   rebalance_time;
+        glusterd_op_t            op;
         dict_t                  *dict; /* Dict to store misc information
                                         * like list of bricks being removed */
 };
@@ -256,59 +257,59 @@ typedef struct glusterd_rebalance_ glusterd_rebalance_t;
 
 struct glusterd_replace_brick_ {
         gf_rb_status_t          rb_status;
-        glusterd_brickinfo_t    *src_brick;
-        glusterd_brickinfo_t    *dst_brick;
+        glusterd_brickinfo_t   *src_brick;
+        glusterd_brickinfo_t   *dst_brick;
         uuid_t                  rb_id;
 };
 
 typedef struct glusterd_replace_brick_ glusterd_replace_brick_t;
 
 struct glusterd_volinfo_ {
-        char                    volname[GLUSTERD_MAX_VOLUME_NAME];
-        int                     type;
-        int                     brick_count;
-        struct list_head        vol_list;
-        struct list_head        bricks;
-        glusterd_volume_status  status;
-        int                     sub_count;  /* backward compatibility */
-        int                     stripe_count;
-        int                     replica_count;
-        int                     subvol_count; /* Number of subvolumes in a
+        char                      volname[GLUSTERD_MAX_VOLUME_NAME];
+        int                       type;
+        int                       brick_count;
+        struct list_head          vol_list;
+        struct list_head          bricks;
+        glusterd_volume_status    status;
+        int                       sub_count;  /* backward compatibility */
+        int                       stripe_count;
+        int                       replica_count;
+        int                       subvol_count; /* Number of subvolumes in a
                                                  distribute volume */
-        int                     dist_leaf_count; /* Number of bricks in one
+        int                       dist_leaf_count; /* Number of bricks in one
                                                     distribute subvolume */
-        int                     port;
-        gf_store_handle_t *shandle;
-        gf_store_handle_t *rb_shandle;
-        gf_store_handle_t *node_state_shandle;
+        int                       port;
+        gf_store_handle_t        *shandle;
+        gf_store_handle_t        *rb_shandle;
+        gf_store_handle_t        *node_state_shandle;
 
         /* Defrag/rebalance related */
-        glusterd_rebalance_t    rebal;
+        glusterd_rebalance_t      rebal;
 
         /* Replace brick status */
-        glusterd_replace_brick_t rep_brick;
+        glusterd_replace_brick_t  rep_brick;
 
-        int                     version;
-        uint32_t                cksum;
-        gf_transport_type       transport_type;
-        gf_transport_type   nfs_transport_type;
+        int                       version;
+        uint32_t                  cksum;
+        gf_transport_type         transport_type;
+        gf_transport_type         nfs_transport_type;
 
-        dict_t                  *dict;
+        dict_t                   *dict;
 
-        uuid_t                  volume_id;
-        auth_t                  auth;
-        char                    *logdir;
+        uuid_t                    volume_id;
+        auth_t                    auth;
+        char                     *logdir;
 
-        dict_t                  *gsync_slaves;
+        dict_t                   *gsync_slaves;
 
-        int                      decommission_in_progress;
-        xlator_t                *xl;
+        int                       decommission_in_progress;
+        xlator_t                 *xl;
 
-        gf_boolean_t             memory_accounting;
-        glusterd_vol_backend_t   backend;
+        gf_boolean_t              memory_accounting;
+        glusterd_vol_backend_t    backend;
 
-        int                      op_version;
-        int                      client_op_version;
+        int                       op_version;
+        int                       client_op_version;
 };
 
 typedef enum gd_node_type_ {
@@ -327,10 +328,10 @@ typedef struct glusterd_pending_node_ {
 } glusterd_pending_node_t;
 
 struct gsync_config_opt_vals_ {
-        char            *op_name;
+        char           *op_name;
         int             no_of_pos_vals;
         gf_boolean_t    case_sensitive;
-        char            *values[GEO_CONF_MAX_OPT_VALS];
+        char           *values[GEO_CONF_MAX_OPT_VALS];
 };
 
 enum glusterd_op_ret {
@@ -403,9 +404,9 @@ typedef ssize_t (*gd_serialize_t) (struct iovec outmsg, void *args);
         }
 
 #define GLUSTERD_STACK_DESTROY(frame) do {\
-		frame->local = NULL;	  \
-		STACK_DESTROY (frame->root);\
-	} while (0)
+                frame->local = NULL;                                    \
+                STACK_DESTROY (frame->root);                            \
+        } while (0)
 
 #define GLUSTERD_GET_DEFRAG_DIR(path, volinfo, priv) do {               \
                 char vol_path[PATH_MAX];                                \
@@ -437,11 +438,11 @@ int glusterd_uuid_generate_save ();
 static inline unsigned char *
 __glusterd_uuid()
 {
-	glusterd_conf_t *priv = THIS->private;
+        glusterd_conf_t *priv = THIS->private;
 
-	if (uuid_is_null (priv->uuid))
-		glusterd_uuid_init();
-	return &priv->uuid[0];
+        if (uuid_is_null (priv->uuid))
+                glusterd_uuid_init();
+        return &priv->uuid[0];
 }
 
 int glusterd_big_locked_notify (struct rpc_clnt *rpc, void *mydata,