BD Backend: CLI commands to create/delete image

Cli commands  added to create/delete a LV device.

The following command creates lv in a given vg.
$ gluster bd create <volname>:<vgname>/<lvname> <size>

The following command deletes lv in a given vg.
$ gluster bd delete <volname>:<vgname>/<lvname>

BUG: 805138
Change-Id: Ie4e100eca14e2ee32cf2bb4dd064b17230d673bf
Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Reviewed-on: http://review.gluster.org/3718
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 225 insertions, 0 deletions

diff --git a/cli/src/cli-cmd-volume-bdevice.c b/cli/src/cli-cmd-volume-bdevice.c
new file mode 100644
index 00000000000..ea7edab6502
--- /dev/null
+++ b/cli/src/cli-cmd-volume-bdevice.c
@@ -0,0 +1,225 @@
+/*
+  CLI for BD translator
+
+  Copyright IBM, Corp. 2012
+
+  This file is part of GlusterFS.
+
+  Author:
+  M. Mohan Kumar <mohan@in.ibm.com>
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "cli.h"
+#include "cli-cmd.h"
+#include <string.h>
+
+extern rpc_clnt_prog_t *cli_rpc_prog;
+
+int
+cli_cmd_bd_help_cbk (struct cli_state *state, struct cli_cmd_word *in_word,
+                      const char **words, int wordcount);
+
+int32_t
+cli_cmd_bd_parse (dict_t *dict, const char **words)
+{
+        char          *volname  = NULL;
+        char          *buff     = NULL;
+        char          *buffp    = NULL;
+        int            ret      = -1;
+        char          *save     = NULL;
+        char          *path     = NULL;
+        char          *size     = NULL;
+        char          *eptr     = NULL;
+        gf_xl_bd_op_t  bd_op    = GF_BD_OP_INVALID;
+
+        /* volname:/path */
+        if (!strchr (words[2], ':') || !strchr (words[2], '/')) {
+                cli_out ("invalid parameter %s, needs <volname:/path>",
+                                words[2]);
+                return -1;
+        }
+        buff = buffp = gf_strdup (words[2]);
+        volname = strtok_r (buff, ":", &save);
+        path = strtok_r (NULL, ":", &save);
+
+        ret = dict_set_dynstr (dict, "volname", gf_strdup (volname));
+        if (ret)
+                goto out;
+
+        ret = dict_set_dynstr (dict, "path", gf_strdup (path));
+        if (ret)
+                goto out;
+
+        if (!strcasecmp (words[1], "create"))
+                bd_op = GF_BD_OP_NEW_BD;
+        else if (!strcasecmp (words[1], "delete"))
+                bd_op = GF_BD_OP_DELETE_BD;
+        else
+                return -1;
+
+        ret = dict_set_int32 (dict, "bd-op", bd_op);
+        if (ret)
+                goto out;
+
+        if (bd_op == GF_BD_OP_NEW_BD) {
+                /* If no suffix given we will treat it as MB */
+                strtoull (words[3], &eptr, 0);
+                /* no suffix */
+                if (!eptr[0])
+                        gf_asprintf (&size, "%sMB", words[3]);
+                else
+                        size = gf_strdup (words[3]);
+
+                ret = dict_set_dynstr (dict, "size", size);
+                if (ret)
+                        goto out;
+        }
+
+        ret = 0;
+out:
+        GF_FREE (buffp);
+        return ret;
+}
+
+/*
+ * bd create <volname>:/path <size>
+ * bd delete <volname>:/path
+ */
+int32_t
+cli_cmd_bd_validate (const char **words, int wordcount, dict_t **options)
+{
+        dict_t  *dict = NULL;
+        int     ret   = -1;
+        char    *op[] = { "create", "delete", NULL };
+        int     index = 0;
+
+        for (index = 0; op[index]; index++)
+                if (!strcasecmp (words[1], op[index]))
+                        break;
+
+        if (!op[index])
+                return -1;
+
+        dict = dict_new ();
+        if (!dict)
+                goto out;
+
+        if (!strcasecmp (words[1], "create")) {
+                if (wordcount != 4)
+                        goto out;
+        } else if (!strcasecmp (words[1], "delete")) {
+                if (wordcount != 3)
+                        goto out;
+        } else {
+                ret = -1;
+                goto out;
+        }
+
+        ret = cli_cmd_bd_parse (dict, words);
+        if (ret < 0)
+                goto out;
+
+        *options = dict;
+        ret = 0;
+out:
+        if (ret)
+                dict_unref (dict);
+        return ret;
+}
+
+int
+cli_cmd_bd_cbk (struct cli_state *state, struct cli_cmd_word *word,
+                         const char **words, int wordcount)
+{
+        int                     ret         = -1;
+        rpc_clnt_procedure_t    *proc       = NULL;
+        call_frame_t            *frame      = NULL;
+        int                     sent        = 0;
+        int                     parse_error = 0;
+        dict_t                  *options    = NULL;
+        cli_local_t             *local = NULL;
+
+        proc = &cli_rpc_prog->proctable[GLUSTER_CLI_BD_OP];
+
+        frame = create_frame (THIS, THIS->ctx->pool);
+        if (!frame)
+                goto out;
+
+        ret = cli_cmd_bd_validate (words, wordcount, &options);
+        if (ret) {
+                cli_usage_out (word->pattern);
+                parse_error = 1;
+                goto out;
+        }
+
+        CLI_LOCAL_INIT (local, words, frame, options);
+        if (proc->fn) {
+                ret = proc->fn (frame, THIS, options);
+        }
+
+out:
+        if (options)
+                dict_unref (options);
+
+        if (ret) {
+                cli_cmd_sent_status_get (&sent);
+                if ((sent == 0) && (parse_error == 0))
+                        cli_out ("BD op failed!");
+        }
+
+        CLI_STACK_DESTROY (frame);
+
+        return ret;
+}
+
+struct cli_cmd cli_bd_cmds[] = {
+        { "bd help",
+           cli_cmd_bd_help_cbk,
+           "display help for bd command"},
+        { "bd create <volname>:<bd> <size>",
+          cli_cmd_bd_cbk,
+          "\n\tcreate a block device where size can be "
+          "suffixed with KB, MB etc. Default size is in MB"},
+        { "bd delete <volname>:<bd>",
+          cli_cmd_bd_cbk,
+          "Delete a block device"},
+        { NULL, NULL, NULL }
+};
+
+int
+cli_cmd_bd_help_cbk (struct cli_state *state, struct cli_cmd_word *in_word,
+                      const char **words, int wordcount)
+{
+        struct cli_cmd *cmd = NULL;
+
+        for (cmd = cli_bd_cmds; cmd->pattern; cmd++)
+                if (_gf_false == cmd->disable)
+                        cli_out ("%s - %s", cmd->pattern, cmd->desc);
+
+        return 0;
+}
+
+int
+cli_cmd_bd_register (struct cli_state *state)
+{
+        int  ret = 0;
+        struct cli_cmd *cmd = NULL;
+
+        for (cmd = cli_bd_cmds; cmd->pattern; cmd++) {
+                ret = cli_cmd_register (&state->tree, cmd);
+                if (ret)
+                        goto out;
+        }
+out:
+        return ret;
+}