make DUMP as another program

* on server side, make it a rpc program.
* on client its another program at protocol

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875

10 files changed, 79 insertions, 243 deletions

diff --git a/xlators/protocol/client/src/client-handshake.c b/xlators/protocol/client/src/client-handshake.c
index 1c239d0cb..f45cc84aa 100644
--- a/xlators/protocol/client/src/client-handshake.c
+++ b/xlators/protocol/client/src/client-handshake.c
@@ -596,88 +596,59 @@ fail:
 }
 
 int
-select_server_supported_programs (xlator_t *this, char *msg)
+select_server_supported_programs (xlator_t *this, gf_prog_detail *prog)
 {
-        clnt_conf_t *conf        = NULL;
-        char        *tmp_str     = NULL;
-        char        *prog_str    = NULL;
-        char        *dup_str     = NULL;
-        char        *tmp_str1    = NULL;
-        char        *tmp_msg     = NULL;
-        char        *progname    = NULL;
-        char        *progver_str = NULL;
-        char        *prognum_str = NULL;
-        int          ret         = -1;
-        int          progver     = 0;
-        int          prognum     = 0;
-
-        if (!this || !msg)
+        gf_prog_detail *trav     = NULL;
+        clnt_conf_t    *conf     = NULL;
+        int             ret      = -1;
+
+        if (!this || !prog)
                 goto out;
 
         conf = this->private;
+        trav = prog;
 
-        /* Reply in "Name:Program-Number:Program-Version,..." format */
-        tmp_msg = gf_strdup (msg);
-        prog_str = strtok_r (tmp_msg, ",", &tmp_str);
-        while (prog_str) {
-                dup_str = gf_strdup (prog_str);
-
-                progname = strtok_r (dup_str, ":", &tmp_str1);
-                prognum_str = strtok_r (NULL, ":", &tmp_str1);
-                if (!prognum_str) {
-                        gf_log (this->name, GF_LOG_WARNING,
-                                "Supported versions not formatted");
-                        goto out;
-                }
-                sscanf (prognum_str, "%d", &prognum);
-                progver_str = strtok_r (NULL, ":", &tmp_str1);
-                if (!progver_str) {
-                        gf_log (this->name, GF_LOG_WARNING,
-                                "Supported versions not formatted");
-                        goto out;
-                }
-                sscanf (progver_str, "%d", &progver);
-
+        while (trav) {
                 /* Select 'programs' */
-                if ((clnt3_1_fop_prog.prognum == prognum) &&
-                    (clnt3_1_fop_prog.progver == progver)) {
+                if ((clnt3_1_fop_prog.prognum == trav->prognum) &&
+                    (clnt3_1_fop_prog.progver == trav->progver)) {
                         conf->fops = &clnt3_1_fop_prog;
                         gf_log (this->name, GF_LOG_INFO,
-                                "Using Program %s, Num (%s), Version (%s)",
-                                progname, prognum_str, progver_str);
+                                "Using Program %s, Num (%"PRId64"), "
+                                "Version (%"PRId64")",
+                                trav->progname, trav->prognum, trav->progver);
                         ret = 0;
                 }
-                if ((clnt3_1_mgmt_prog.prognum == prognum) &&
-                    (clnt3_1_mgmt_prog.progver == progver)) {
+                if ((clnt3_1_mgmt_prog.prognum == trav->prognum) &&
+                    (clnt3_1_mgmt_prog.progver == trav->progver)) {
                         conf->mgmt = &clnt3_1_mgmt_prog;
                         gf_log (this->name, GF_LOG_INFO,
-                                "Using Program %s, Num (%s), Version (%s)",
-                                progname, prognum_str, progver_str);
+                                "Using Program %s, Num (%"PRId64"), "
+                                "Version (%"PRId64")",
+                                trav->progname, trav->prognum, trav->progver);
                         ret = 0;
                 }
-
-                prog_str = strtok_r (NULL, ",", &tmp_str);
-                GF_FREE (dup_str);
+                if (ret) {
+                        gf_log (this->name, GF_LOG_TRACE,
+                                "%s (%"PRId64") not supported", trav->progname,
+                                trav->progver);
+                }
+                trav = trav->next;
         }
 
-        if (ret) {
-                gf_log (this->name, GF_LOG_ERROR,
-                        "none of the server versions are supported by client");
-        }
-        ret = 0;
 out:
-        if (tmp_msg)
-                GF_FREE (tmp_msg);
         return ret;
 }
 
 int
 client_dump_version_cbk (struct rpc_req *req, struct iovec *iov, int count, void *myframe)
 {
-        gf_dump_version_rsp  rsp   = {0,};
-        call_frame_t            *frame = NULL;
-        clnt_conf_t             *conf = NULL;
-        int                      ret   = 0;
+        gf_dump_rsp     rsp   = {0,};
+        gf_prog_detail *trav  = NULL;
+        gf_prog_detail *next  = NULL;
+        call_frame_t   *frame = NULL;
+        clnt_conf_t    *conf  = NULL;
+        int             ret   = 0;
 
         frame = myframe;
         conf  = frame->this->private;
@@ -687,7 +658,7 @@ client_dump_version_cbk (struct rpc_req *req, struct iovec *iov, int count, void
                 goto out;
         }
 
-        ret = xdr_to_dump_version_rsp (*iov, &rsp);
+        ret = xdr_to_dump_rsp (*iov, &rsp);
         if (ret < 0) {
                 gf_log ("", GF_LOG_ERROR, "error");
                 goto out;
@@ -700,12 +671,11 @@ client_dump_version_cbk (struct rpc_req *req, struct iovec *iov, int count, void
 
         /* Check for the proper version string */
         /* Reply in "Name:Program-Number:Program-Version,..." format */
-        ret = select_server_supported_programs (frame->this,
-                                                rsp.msg.msg_val);
+        ret = select_server_supported_programs (frame->this, rsp.prog);
         if (ret) {
                 gf_log (frame->this->name, GF_LOG_ERROR,
                         "Server versions are not present in this "
-                        "release (%s)", rsp.msg.msg_val);
+                        "release");
                 goto out;
         }
 
@@ -713,8 +683,13 @@ client_dump_version_cbk (struct rpc_req *req, struct iovec *iov, int count, void
 
 out:
         /* don't use GF_FREE, buffer was allocated by libc */
-        if (rsp.msg.msg_val) {
-                free (rsp.msg.msg_val);
+        if (rsp.prog) {
+                trav = rsp.prog;
+                while (trav) {
+                        next = trav->next;
+                        free (trav);
+                        trav = next;
+                }
         }
 
         STACK_DESTROY (frame->root);
@@ -724,10 +699,10 @@ out:
 int
 client_handshake (xlator_t *this, struct rpc_clnt *rpc)
 {
-        call_frame_t        *frame = NULL;
-        clnt_conf_t         *conf  = NULL;
-        gf_dump_version_req  req   = {0,};
-        int                  ret   = 0;
+        call_frame_t *frame = NULL;
+        clnt_conf_t  *conf  = NULL;
+        gf_dump_req   req   = {0,};
+        int           ret   = 0;
 
         conf = this->private;
         if (!conf->handshake)
@@ -737,24 +712,17 @@ client_handshake (xlator_t *this, struct rpc_clnt *rpc)
         if (!frame)
                 goto out;
 
-        req.key = "fop-handshake";
-        req.gfs_id = 123456;
-        ret = client_submit_request (this, &req, frame, conf->handshake,
-                                     GF_HNDSK_DUMP_VERSION,
-                                     client_dump_version_cbk,
-                                     NULL, xdr_from_dump_version_req);
+        req.gfs_id = 0xbabe;
+        ret = client_submit_request (this, &req, frame, conf->dump,
+                                     GF_DUMP_DUMP, client_dump_version_cbk,
+                                     NULL, xdr_from_dump_req);
 
 out:
         return ret;
 }
 
-
-/* */
-/* This table should ideally remain same irrespective of versions */
-
 char *clnt_handshake_procs[GF_HNDSK_MAXVALUE] = {
         [GF_HNDSK_NULL]         = "NULL",
-        [GF_HNDSK_DUMP_VERSION] = "VERSION",
         [GF_HNDSK_SETVOLUME]    = "SETVOLUME",
         [GF_HNDSK_GETSPEC]      = "GETSPEC",
         [GF_HNDSK_PING]         = "PING",
@@ -766,3 +734,15 @@ rpc_clnt_prog_t clnt_handshake_prog = {
         .progver   = GLUSTER_HNDSK_VERSION,
         .procnames = clnt_handshake_procs,
 };
+
+char *clnt_dump_proc[GF_DUMP_MAXVALUE] = {
+        [GF_DUMP_NULL] = "NULL",
+        [GF_DUMP_DUMP] = "DUMP",
+};
+
+rpc_clnt_prog_t clnt_dump_prog = {
+        .progname  = "GF-DUMP",
+        .prognum   = GLUSTER_DUMP_PROGRAM,
+        .progver   = GLUSTER_DUMP_VERSION,
+        .procnames = clnt_dump_proc,
+};
diff --git a/xlators/protocol/client/src/client.c b/xlators/protocol/client/src/client.c
index 6ad594400..97e638dfc 100644
--- a/xlators/protocol/client/src/client.c
+++ b/xlators/protocol/client/src/client.c
@@ -32,6 +32,8 @@
 #include "compat-errno.h"
 
 extern rpc_clnt_prog_t clnt_handshake_prog;
+extern rpc_clnt_prog_t clnt_dump_prog;
+
 int
 client_handshake (xlator_t *this, struct rpc_clnt *rpc);
 
@@ -1558,6 +1560,7 @@ init (xlator_t *this)
                 goto out;
 
         conf->handshake = &clnt_handshake_prog;
+        conf->dump      = &clnt_dump_prog;
         this->private = conf;
 
         ret = 0;
diff --git a/xlators/protocol/client/src/client.h b/xlators/protocol/client/src/client.h
index 1422c7abe..26679cf63 100644
--- a/xlators/protocol/client/src/client.h
+++ b/xlators/protocol/client/src/client.h
@@ -48,6 +48,7 @@ typedef struct clnt_conf {
         rpc_clnt_prog_t       *fops;
         rpc_clnt_prog_t       *mgmt;
         rpc_clnt_prog_t       *handshake;
+        rpc_clnt_prog_t       *dump;
 } clnt_conf_t;
 
 typedef struct _client_fd_ctx {
diff --git a/xlators/protocol/lib/src/glusterfs-xdr.c b/xlators/protocol/lib/src/glusterfs-xdr.c
index cbc4d7cef..92b8c2ed2 100644
--- a/xlators/protocol/lib/src/glusterfs-xdr.c
+++ b/xlators/protocol/lib/src/glusterfs-xdr.c
@@ -1667,38 +1667,6 @@ xdr_gf_common_rsp (XDR *xdrs, gf_common_rsp *objp)
 
 
 bool_t
-xdr_gf_dump_version_req (XDR *xdrs, gf_dump_version_req *objp)
-{
-
-	 if (!xdr_u_quad_t (xdrs, &objp->gfs_id))
-		 return FALSE;
-	 if (!xdr_u_int (xdrs, &objp->flags))
-		 return FALSE;
-	 if (!xdr_string (xdrs, &objp->key, ~0))
-		 return FALSE;
-	return TRUE;
-}
-
-bool_t
-xdr_gf_dump_version_rsp (XDR *xdrs, gf_dump_version_rsp *objp)
-{
-
-	 if (!xdr_u_quad_t (xdrs, &objp->gfs_id))
-		 return FALSE;
-	 if (!xdr_int (xdrs, &objp->op_ret))
-		 return FALSE;
-	 if (!xdr_int (xdrs, &objp->op_errno))
-		 return FALSE;
-	 if (!xdr_u_int (xdrs, &objp->flags))
-		 return FALSE;
-	 if (!xdr_bytes (xdrs, (char **)&objp->msg.msg_val, (u_int *) &objp->msg.msg_len, ~0))
-		 return FALSE;
-	return TRUE;
-}
-
-
-
-bool_t
 xdr_gfs3_dirlist (XDR *xdrs, gfs3_dirlist *objp)
 {
 	 if (!xdr_u_quad_t (xdrs, &objp->d_ino))
diff --git a/xlators/protocol/lib/src/glusterfs-xdr.h b/xlators/protocol/lib/src/glusterfs-xdr.h
index 45ce3ff9b..a3afe8861 100644
--- a/xlators/protocol/lib/src/glusterfs-xdr.h
+++ b/xlators/protocol/lib/src/glusterfs-xdr.h
@@ -1063,25 +1063,6 @@ struct gf_common_rsp {
 };
 typedef struct gf_common_rsp gf_common_rsp;
 
-struct gf_dump_version_req {
-	u_quad_t gfs_id;
-        u_int  flags;
-        char *key;
-};
-typedef struct gf_dump_version_req gf_dump_version_req;
-
-struct gf_dump_version_rsp {
-	u_quad_t gfs_id;
-	int op_ret;
-	int op_errno;
-        u_int flags;
-	struct {
-		u_int msg_len;
-		char *msg_val;
-	} msg;
-};
-typedef struct gf_dump_version_rsp gf_dump_version_rsp;
-
 struct gfs3_dirlist {
 	u_quad_t d_ino;
 	u_quad_t d_off;
@@ -1208,8 +1189,6 @@ extern  bool_t xdr_gf_notify_rsp (XDR *, gf_notify_rsp*);
 extern  bool_t xdr_gfs3_releasedir_req (XDR *, gfs3_releasedir_req*);
 extern  bool_t xdr_gfs3_release_req (XDR *, gfs3_release_req*);
 extern  bool_t xdr_gf_common_rsp (XDR *, gf_common_rsp*);
-extern  bool_t xdr_gf_dump_version_req (XDR *, gf_dump_version_req *);
-extern  bool_t xdr_gf_dump_version_rsp (XDR *, gf_dump_version_rsp *);
 
 #else /* K&R C */
 extern bool_t xdr_gf_statfs ();
@@ -1297,8 +1276,6 @@ extern bool_t xdr_gf_log_req ();
 extern bool_t xdr_gf_notify_req ();
 extern bool_t xdr_gf_notify_rsp ();
 extern bool_t xdr_gf_common_rsp ();
-extern bool_t xdr_gf_dump_version_req ();
-extern bool_t xdr_gf_dump_version_rsp ();
 
 #endif /* K&R C */
 
diff --git a/xlators/protocol/lib/src/glusterfs3.x b/xlators/protocol/lib/src/glusterfs3.x
index b2eb9556c..cafe965ef 100644
--- a/xlators/protocol/lib/src/glusterfs3.x
+++ b/xlators/protocol/lib/src/glusterfs3.x
@@ -732,19 +732,20 @@ struct gf_common_rsp {
 } ;
 
 
-struct gf_dump_version_req {
-	unsigned hyper gfs_id;
-        unsigned int   flags;
-        string         key<>;
+struct gf_dump_req {
+       unsigned hyper gfs_id;
 };
 
+struct gf_prog_detail {
+       string progname<>;
+       unsigned hyper prognum;
+       unsigned hyper progver;
+       struct gf_prog_detail *next;
+};
 
-struct gf_dump_version_rsp {
-        unsigned hyper gfs_id;
-        int op_ret;
-	int op_errno;
-        unsigned int flags;
-        opaque msg<>;
+struct gf_dump_rsp {
+       unsigned hyper gfs_id;
+       struct gf_prog_detail *prog;
 };
 
 struct auth_glusterfs_parms {
diff --git a/xlators/protocol/lib/src/msg-xdr.c b/xlators/protocol/lib/src/msg-xdr.c
index 3fe5ad5f6..9227e715f 100644
--- a/xlators/protocol/lib/src/msg-xdr.c
+++ b/xlators/protocol/lib/src/msg-xdr.c
@@ -341,24 +341,6 @@ xdr_serialize_ftruncate_rsp (struct iovec outmsg, void *rsp)
 
 
 ssize_t
-xdr_serialize_dump_version_rsp (struct iovec outmsg, void *rsp)
-{
-        return xdr_serialize_generic (outmsg, (void *)rsp,
-                                      (xdrproc_t)xdr_gf_dump_version_rsp);
-}
-
-
-/* Decode */
-
-
-ssize_t
-xdr_to_dump_version_req (struct iovec inmsg, void *args)
-{
-        return xdr_to_generic (inmsg, (void *)args,
-                               (xdrproc_t)xdr_gf_dump_version_req);
-}
-
-ssize_t
 xdr_to_lookup_req (struct iovec inmsg, void *args)
 {
         return xdr_to_generic (inmsg, (void *)args,
@@ -960,13 +942,6 @@ xdr_from_setvolume_req (struct iovec outmsg, void *req)
 
 }
 ssize_t
-xdr_from_dump_version_req (struct iovec outmsg, void *req)
-{
-        return xdr_serialize_generic (outmsg, (void *)req,
-                                      (xdrproc_t)xdr_gf_dump_version_req);
-
-}
-ssize_t
 xdr_from_rmdir_req (struct iovec outmsg, void *req)
 {
         return xdr_serialize_generic (outmsg, (void *)req,
@@ -1207,13 +1182,6 @@ xdr_to_setvolume_rsp (struct iovec outmsg, void *rsp)
 
 }
 ssize_t
-xdr_to_dump_version_rsp (struct iovec outmsg, void *rsp)
-{
-        return xdr_to_generic (outmsg, (void *)rsp,
-                                      (xdrproc_t)xdr_gf_dump_version_rsp);
-
-}
-ssize_t
 xdr_to_rmdir_rsp (struct iovec outmsg, void *rsp)
 {
         return xdr_to_generic (outmsg, (void *)rsp,
diff --git a/xlators/protocol/lib/src/msg-xdr.h b/xlators/protocol/lib/src/msg-xdr.h
index 59b6ca301..025b7f8c7 100644
--- a/xlators/protocol/lib/src/msg-xdr.h
+++ b/xlators/protocol/lib/src/msg-xdr.h
@@ -406,23 +406,11 @@ ssize_t
 xdr_from_release_req (struct iovec outmsg, void *args);
 
 ssize_t
-xdr_from_dump_version_req (struct iovec outmsg, void *args);
-
-ssize_t
 xdr_from_setvolume_req (struct iovec outmsg, void *args);
 
 ssize_t
 xdr_to_setvolume_rsp (struct iovec inmsg, void *args);
 
-ssize_t
-xdr_to_dump_version_rsp (struct iovec inmsg, void *args);
-
-
-ssize_t
-xdr_serialize_dump_version_rsp (struct iovec outmsg, void *args);
-
-ssize_t
-xdr_to_dump_version_req (struct iovec inmsg, void *args);
 
 
 ssize_t
diff --git a/xlators/protocol/lib/src/protocol-common.h b/xlators/protocol/lib/src/protocol-common.h
index 5590960a6..78ee2581f 100644
--- a/xlators/protocol/lib/src/protocol-common.h
+++ b/xlators/protocol/lib/src/protocol-common.h
@@ -69,7 +69,6 @@ enum gf_fop_procnum {
 
 enum gf_handshake_procnum {
         GF_HNDSK_NULL,
-        GF_HNDSK_DUMP_VERSION,
         GF_HNDSK_SETVOLUME,
         GF_HNDSK_GETSPEC,
         GF_HNDSK_PING,
diff --git a/xlators/protocol/server/src/server-handshake.c b/xlators/protocol/server/src/server-handshake.c
index 94586d20c..61630d1f6 100644
--- a/xlators/protocol/server/src/server-handshake.c
+++ b/xlators/protocol/server/src/server-handshake.c
@@ -241,52 +241,6 @@ out:
         return ret;
 }
 
-int
-build_program_list (server_conf_t *conf, char *list)
-{
-        /* Reply in "Name:Program-Number:Program-Version,..." format */
-        sprintf (list, "%s:%d:%d",
-                 glusterfs3_1_fop_prog.progname,
-                 glusterfs3_1_fop_prog.prognum,
-                 glusterfs3_1_fop_prog.progver);
-        /* TODO: keep adding new versions to the list here */
-        return 0;
-}
-
-int
-server_dump_version (rpcsvc_request_t *req)
-{
-        char                     list[8192]  = {0,};
-        server_conf_t           *conf     = NULL;
-        int                      ret      = -1;
-        int                      op_errno = EINVAL;
-        gf_dump_version_req      args     = {0,};
-        gf_dump_version_rsp      rsp      = {0,};
-
-        conf = ((xlator_t *)req->conn->svc->mydata)->private;
-
-        if (xdr_to_glusterfs_req (req, &args, xdr_to_dump_version_req)) {
-                //failed to decode msg;
-                req->rpc_err = GARBAGE_ARGS;
-                goto fail;
-        }
-
-        build_program_list (conf, list);
-        rsp.msg.msg_val = list;
-        rsp.msg.msg_len = strlen (list) + 1;
-        ret = 0;
-fail:
-        rsp.op_errno = gf_errno_to_error (op_errno);
-        rsp.op_ret   = ret;
-
-        server_submit_reply (NULL, req, &rsp, NULL, 0, NULL,
-                             (gfs_serialize_t)xdr_serialize_dump_version_rsp);
-
-        if (args.key)
-                free (args.key);
-
-        return 0;
-}
 
 int
 server_getspec (rpcsvc_request_t *req)
@@ -672,11 +626,10 @@ server_ping (rpcsvc_request_t *req)
 
 
 rpcsvc_actor_t gluster_handshake_actors[] = {
-        [GF_HNDSK_NULL] = {"NULL", GF_HNDSK_NULL, server_null, NULL, NULL },
-        [GF_HNDSK_DUMP_VERSION] = {"VERSION",   GF_HNDSK_DUMP_VERSION, server_dump_version, NULL, NULL },
+        [GF_HNDSK_NULL]      = {"NULL",      GF_HNDSK_NULL,      server_null, NULL, NULL },
         [GF_HNDSK_SETVOLUME] = {"SETVOLUME", GF_HNDSK_SETVOLUME, server_setvolume, NULL, NULL },
-        [GF_HNDSK_GETSPEC] = {"GETSPEC",   GF_HNDSK_GETSPEC,   server_getspec, NULL, NULL },
-        [GF_HNDSK_PING] = {"PING",      GF_HNDSK_PING,      server_ping, NULL, NULL },
+        [GF_HNDSK_GETSPEC]   = {"GETSPEC",   GF_HNDSK_GETSPEC,   server_getspec, NULL, NULL },
+        [GF_HNDSK_PING]      = {"PING",      GF_HNDSK_PING,      server_ping, NULL, NULL },
 };
 
 
@@ -684,8 +637,6 @@ struct rpcsvc_program gluster_handshake_prog = {
         .progname  = "GlusterFS Handshake",
         .prognum   = GLUSTER_HNDSK_PROGRAM,
         .progver   = GLUSTER_HNDSK_VERSION,
-
         .actors    = gluster_handshake_actors,
-        .numactors = 5,
-        .progport  = 7008,
+        .numactors = GF_HNDSK_MAXVALUE,
 };