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/*
   Copyright (c) 2010-2016 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
   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.
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/file.h>
#include <netdb.h>
#include <signal.h>
#include <libgen.h>

#include <sys/utsname.h>

#include <stdint.h>
#include <pthread.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <semaphore.h>
#include <errno.h>

#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif

#ifdef HAVE_MALLOC_STATS
#ifdef DEBUG
#include <mcheck.h>
#endif
#endif

#include "cli.h"
#include "cli-quotad-client.h"
#include "cli-cmd.h"
#include "cli-mem-types.h"

#include "xlator.h"
#include "glusterfs.h"
#include "compat.h"
#include "logging.h"
#include "dict.h"
#include "list.h"
#include "timer.h"
#include "stack.h"
#include "revision.h"
#include "common-utils.h"
#include "event.h"
#include "globals.h"
#include "syscall.h"
#include "call-stub.h"
#include <fnmatch.h>

#include "xdr-generic.h"

extern int connected;
/* using argp for command line parsing */

const char *argp_program_version = ""                                         \
        PACKAGE_NAME" "PACKAGE_VERSION                                        \
        "\nRepository revision: " GLUSTERFS_REPOSITORY_REVISION "\n"          \
        "Copyright (c) 2006-2016 Red Hat, Inc. "                              \
        "<https://www.gluster.org/>\n"                                        \
        "GlusterFS comes with ABSOLUTELY NO WARRANTY.\n"                      \
        "It is licensed to you under your choice of the GNU Lesser\n"         \
        "General Public License, version 3 or any later version (LGPLv3\n"    \
        "or later), or the GNU General Public License, version 2 (GPLv2),\n"  \
        "in all cases as published by the Free Software Foundation.";
const char *argp_program_bug_address = "<" PACKAGE_BUGREPORT ">";

struct rpc_clnt *global_quotad_rpc;
struct rpc_clnt *global_rpc;

rpc_clnt_prog_t *cli_rpc_prog;


extern struct rpc_clnt_program cli_prog;

static int
glusterfs_ctx_defaults_init (glusterfs_ctx_t *ctx)
{
        cmd_args_t    *cmd_args = NULL;
        struct rlimit  lim = {0, };
        call_pool_t   *pool = NULL;
        int            ret         = -1;

        ret = xlator_mem_acct_init (THIS, cli_mt_end);
        if (ret != 0) {
                return ret;
        }

        ctx->process_uuid = generate_glusterfs_ctx_id ();
        if (!ctx->process_uuid)
                return -1;

        ctx->page_size  = 128 * GF_UNIT_KB;

        ctx->iobuf_pool = iobuf_pool_new ();
        if (!ctx->iobuf_pool)
                return -1;

        ctx->event_pool = event_pool_new (DEFAULT_EVENT_POOL_SIZE,
                                          STARTING_EVENT_THREADS);
        if (!ctx->event_pool)
                return -1;

        pool = GF_CALLOC (1, sizeof (call_pool_t),
                          cli_mt_call_pool_t);
        if (!pool)
                return -1;

        /* frame_mem_pool size 112 * 64 */
        pool->frame_mem_pool = mem_pool_new (call_frame_t, 32);
        if (!pool->frame_mem_pool)
                return -1;

        /* stack_mem_pool size 256 * 128 */
        pool->stack_mem_pool = mem_pool_new (call_stack_t, 16);

        if (!pool->stack_mem_pool)
                return -1;

        ctx->stub_mem_pool = mem_pool_new (call_stub_t, 16);
        if (!ctx->stub_mem_pool)
                return -1;

        ctx->dict_pool = mem_pool_new (dict_t, 32);
        if (!ctx->dict_pool)
                return -1;

        ctx->dict_pair_pool = mem_pool_new (data_pair_t, 512);
        if (!ctx->dict_pair_pool)
                return -1;

        ctx->dict_data_pool = mem_pool_new (data_t, 512);
        if (!ctx->dict_data_pool)
                return -1;

        ctx->logbuf_pool = mem_pool_new (log_buf_t, 256);
        if (!ctx->logbuf_pool)
                return -1;

        INIT_LIST_HEAD (&pool->all_frames);
        LOCK_INIT (&pool->lock);
        ctx->pool = pool;

        cmd_args = &ctx->cmd_args;

        INIT_LIST_HEAD (&cmd_args->xlator_options);

        lim.rlim_cur = RLIM_INFINITY;
        lim.rlim_max = RLIM_INFINITY;
        setrlimit (RLIMIT_CORE, &lim);

        return 0;
}


static int
logging_init (glusterfs_ctx_t *ctx, struct cli_state *state)
{
        char *log_file = state->log_file ? state->log_file :
                         DEFAULT_CLI_LOG_FILE_DIRECTORY "/cli.log";

        /* passing ident as NULL means to use default ident for syslog */
        if (gf_log_init (ctx, log_file, NULL) == -1) {
                fprintf (stderr, "ERROR: failed to open logfile %s\n",
                         log_file);
                return -1;
        }

        /* CLI should not have something to DEBUG after the release,
           hence defaulting to INFO loglevel */
        gf_log_set_loglevel ((state->log_level == GF_LOG_NONE) ? GF_LOG_INFO :
                             state->log_level);

        return 0;
}

int
cli_submit_request (struct rpc_clnt *rpc, void *req, call_frame_t *frame,
                    rpc_clnt_prog_t *prog,
                    int procnum, struct iobref *iobref,
                    xlator_t *this, fop_cbk_fn_t cbkfn, xdrproc_t xdrproc)
{
        int                     ret         = -1;
        int                     count      = 0;
        struct iovec            iov         = {0, };
        struct iobuf            *iobuf = NULL;
        char                    new_iobref = 0;
        ssize_t                 xdr_size   = 0;

        GF_ASSERT (this);

        if (req) {
                xdr_size = xdr_sizeof (xdrproc, req);
                iobuf = iobuf_get2 (this->ctx->iobuf_pool, xdr_size);
                if (!iobuf) {
                        goto out;
                };

                if (!iobref) {
                        iobref = iobref_new ();
                        if (!iobref) {
                                goto out;
                        }

                        new_iobref = 1;
                }

                iobref_add (iobref, iobuf);

                iov.iov_base = iobuf->ptr;
                iov.iov_len  = iobuf_size (iobuf);


                /* Create the xdr payload */
                ret = xdr_serialize_generic (iov, req, xdrproc);
                if (ret == -1) {
                        goto out;
                }
                iov.iov_len = ret;
                count = 1;
        }

        if (!rpc)
                rpc = global_rpc;
        /* Send the msg */
        ret = rpc_clnt_submit (rpc, prog, procnum, cbkfn,
                               &iov, count,
                               NULL, 0, iobref, frame, NULL, 0, NULL, 0, NULL);
        ret = 0;

out:
        if (new_iobref)
                iobref_unref (iobref);
        if (iobuf)
                iobuf_unref (iobuf);
        return ret;
}

int
cli_rpc_notify (struct rpc_clnt *rpc, void *mydata, rpc_clnt_event_t event,
                void *data)
{
        xlator_t                *this = NULL;
        int                     ret = 0;

        this = mydata;

        switch (event) {
        case RPC_CLNT_CONNECT:
        {

                cli_cmd_broadcast_connected ();
                gf_log (this->name, GF_LOG_TRACE, "got RPC_CLNT_CONNECT");
               break;
        }

        case RPC_CLNT_DISCONNECT:
        {
                gf_log (this->name, GF_LOG_TRACE, "got RPC_CLNT_DISCONNECT");
                connected = 0;
                if (!global_state->prompt && global_state->await_connected) {
                        ret = 1;
                        cli_out ("Connection failed. Please check if gluster "
                                  "daemon is operational.");
                        exit (ret);
                }
                break;
        }

        default:
                gf_log (this->name, GF_LOG_TRACE,
                        "got some other RPC event %d", event);
                ret = 0;
                break;
        }

        return ret;
}

static gf_boolean_t
is_valid_int (char *str)
{
        if (*str == '-')
                ++str;

        /* Handle empty string or just "-".*/
        if (!*str)
                return _gf_false;

        /* Check for non-digit chars in the rest of the string */
        while (*str) {
                if (!isdigit(*str))
                        return _gf_false;
        else
                ++str;
        }
        return _gf_true;
}

/*
 * ret: 0: option successfully processed
 *      1: signalling end of option list
 *     -1: unknown option
 *     -2: parsing issue (avoid unknown option error)
 */
int
cli_opt_parse (char *opt, struct cli_state *state)
{
        char            *oarg           = NULL;
        gf_boolean_t    secure_mgmt_tmp = 0;

        if (strcmp (opt, "") == 0)
                return 1;

        if (strcmp (opt, "version") == 0) {
                cli_out ("%s", argp_program_version);
                exit (0);
        }

        if (strcmp (opt, "print-logdir") == 0) {
                cli_out ("%s", DEFAULT_LOG_FILE_DIRECTORY);
                exit (0);
        }

        if (strcmp (opt, "print-statedumpdir") == 0) {
                cli_out ("%s", DEFAULT_VAR_RUN_DIRECTORY);
                exit (0);
        }

        if (strcmp (opt, "xml") == 0) {
#if (HAVE_LIB_XML)
                state->mode |= GLUSTER_MODE_XML;
#else
                cli_err ("XML output not supported. Ignoring '--xml' option");
#endif
                return 0;
        }

        if (strcmp (opt, "wignore") == 0) {
                state->mode |= GLUSTER_MODE_WIGNORE;
                return 0;
        }

        oarg = strtail (opt, "mode=");
        if (oarg) {
                if (strcmp (oarg, "script") == 0) {
                        state->mode |= GLUSTER_MODE_SCRIPT;
                        return 0;
                }

                if (strcmp (oarg, "interactive") == 0)
                        return 0;

                return -1;
        }

        oarg = strtail (opt, "remote-host=");
        if (oarg) {
                state->remote_host = oarg;
                return 0;
        }

        oarg = strtail (opt, "log-file=");
        if (oarg) {
                state->log_file = oarg;
                return 0;
        }
        oarg = strtail (opt, "timeout=");
        if (oarg) {
                if (!is_valid_int (oarg) || atoi(oarg) <= 0) {
                        cli_err ("timeout value should be a positive integer");
                        return -2; /* -2 instead of -1 to avoid unknown option
                                      error */
                }
                cli_default_conn_timeout = atoi(oarg);
                return 0;
        }

        oarg = strtail (opt, "log-level=");
        if (oarg) {
                int log_level = glusterd_check_log_level(oarg);
                if (log_level == -1)
                        return -1;
                state->log_level = (gf_loglevel_t) log_level;
                return 0;
        }

        oarg = strtail (opt, "glusterd-sock=");
        if (oarg) {
                state->glusterd_sock = oarg;
                return 0;
        }

        oarg = strtail (opt, "secure-mgmt=");
        if (oarg) {
                if (gf_string2boolean(oarg,&secure_mgmt_tmp) == 0) {
                        if (secure_mgmt_tmp) {
                                /* See declaration for why this is an int. */
                                state->ctx->secure_mgmt = 1;
                        }
                }
                else {
                        cli_err ("invalide secure-mgmt value (ignored)");
                }
                return 0;
        }

        return -1;
}

int
parse_cmdline (int argc, char *argv[], struct cli_state *state)
{
        int                 ret            = 0;
        int                 i              = 0;
        int                 j              = 0;
        char               *opt            = NULL;
        gf_boolean_t       geo_rep_config  = _gf_false;

        state->argc=argc-1;
        state->argv=&argv[1];

        /* Do this first so that an option can override. */
        if (sys_access (SECURE_ACCESS_FILE, F_OK) == 0) {
                state->ctx->secure_mgmt = 1;
        }

        if (state->argc > GEO_REP_CMD_CONFIG_INDEX &&
            strtail (state->argv[GEO_REP_CMD_INDEX], "geo") &&
            strtail (state->argv[GEO_REP_CMD_CONFIG_INDEX], "co"))
                geo_rep_config = _gf_true;

        for (i = 0; i < state->argc; i++) {
                opt = strtail (state->argv[i], "--");
                if (opt && !geo_rep_config) {
                        ret = cli_opt_parse (opt, state);
                        if (ret == -1) {
                                cli_out ("unrecognized option --%s", opt);
                                return ret;
                        } else if (ret == -2) {
                                return ret;
                        }
                        for (j = i; j < state->argc - 1; j++)
                                state->argv[j] = state->argv[j + 1];
                        state->argc--;
                        /* argv shifted, next check should be at i again */
                        i--;
                        if (ret == 1) {
                                /* end of cli options */
                                ret = 0;
                                break;
                        }
                }
        }

        state->argv[state->argc] = NULL;

        return ret;
}


int
cli_cmd_tree_init (struct cli_cmd_tree *tree)
{
        struct cli_cmd_word  *root = NULL;
        int                   ret = 0;

        root = &tree->root;
        root->tree = tree;

        return ret;
}


int
cli_state_init (struct cli_state *state)
{
        struct cli_cmd_tree  *tree = NULL;
        int                   ret = 0;


        state->log_level = GF_LOG_NONE;

        tree = &state->tree;
        tree->state = state;

        ret = cli_cmd_tree_init (tree);

        return ret;
}

int
cli_usage_out (const char *usage)
{
        GF_ASSERT (usage);
        GF_ASSERT (usage[0] != '\0');

        if (!usage || usage[0] == '\0')
                return -1;

        cli_err ("Usage: %s", usage);
        return 0;
}

int
_cli_err (const char *fmt, ...)
{
        va_list           ap;
        int               ret = 0;
#ifdef HAVE_READLINE
        struct cli_state *state = global_state;
#endif

        va_start (ap, fmt);

#ifdef HAVE_READLINE
        if (state->rl_enabled && !state->rl_processing) {
                ret = cli_rl_err (state, fmt, ap);
                va_end (ap);
                return ret;
        }
#endif

        ret = vfprintf (stderr, fmt, ap);
        fprintf (stderr, "\n");
        va_end (ap);

        return ret;
}


int
_cli_out (const char *fmt, ...)
{
        va_list           ap;
        int               ret = 0;
#ifdef HAVE_READLINE
        struct cli_state *state = global_state;
#endif

        va_start (ap, fmt);
#ifdef HAVE_READLINE
        if (state->rl_enabled && !state->rl_processing) {
                ret = cli_rl_out (state, fmt, ap);
                va_end (ap);
                return ret;
        }
#endif

        ret = vprintf (fmt, ap);
        printf ("\n");
        va_end (ap);

        return ret;
}

struct rpc_clnt *
cli_quotad_clnt_rpc_init (void)
{
        struct rpc_clnt *rpc = NULL;
        dict_t          *rpc_opts = NULL;
        int             ret = -1;

        rpc_opts = dict_new ();
        if (!rpc_opts) {
                        ret = -1;
                        goto out;
                }

        ret = dict_set_str (rpc_opts, "transport.address-family", "unix");
        if (ret)
                goto out;

        ret = dict_set_str (rpc_opts, "transport-type", "socket");
        if (ret)
                goto out;

        ret = dict_set_str (rpc_opts, "transport.socket.connect-path",
                                            "/var/run/gluster/quotad.socket");
        if (ret)
                goto out;

        rpc = cli_quotad_clnt_init (THIS, rpc_opts);
        if (!rpc)
                goto out;

        global_quotad_rpc = rpc;
out:
        if (ret) {
                if (rpc_opts)
                        dict_unref(rpc_opts);
        }
        return rpc;
}

struct rpc_clnt *
cli_rpc_init (struct cli_state *state)
{
        struct rpc_clnt         *rpc = NULL;
        dict_t                  *options = NULL;
        int                     ret = -1;
        int                     port = CLI_GLUSTERD_PORT;
        xlator_t                *this = NULL;
        char                    *addr_family = "inet";

        this = THIS;
        cli_rpc_prog = &cli_prog;
        options = dict_new ();
        if (!options)
                goto out;

        /* Connect to glusterd using the specified method, giving preference
         * to a unix socket connection.  If nothing is specified, connect to
         * the default glusterd socket.
         */
        if (state->glusterd_sock) {
                gf_log ("cli", GF_LOG_INFO, "Connecting to glusterd using "
                        "sockfile %s", state->glusterd_sock);
                ret = rpc_transport_unix_options_build (&options,
                                                        state->glusterd_sock,
                                                        0);
                if (ret)
                        goto out;
        }
        else if (state->remote_host) {
                gf_log ("cli", GF_LOG_INFO, "Connecting to remote glusterd at "
                        "%s", state->remote_host);
                ret = dict_set_str (options, "remote-host", state->remote_host);
                if (ret)
                        goto out;

                if (state->remote_port)
                        port = state->remote_port;

                ret = dict_set_int32 (options, "remote-port", port);
                if (ret)
                        goto out;

                ret = dict_set_str (options, "transport.address-family",
                                        addr_family);

                if (ret)
                        goto out;
        }
        else {
                gf_log ("cli", GF_LOG_DEBUG, "Connecting to glusterd using "
                        "default socket");
                ret = rpc_transport_unix_options_build
                        (&options, DEFAULT_GLUSTERD_SOCKFILE, 0);
                if (ret)
                        goto out;
        }

        rpc = rpc_clnt_new (options, this, this->name, 16);
        if (!rpc)
                goto out;

        ret = rpc_clnt_register_notify (rpc, cli_rpc_notify, this);
        if (ret) {
                gf_log ("cli", GF_LOG_ERROR, "failed to register notify");
                goto out;
        }

        ret = rpc_clnt_start (rpc);
out:
        if (ret) {
                if (rpc)
                        rpc_clnt_unref (rpc);
                rpc = NULL;
        }
        return rpc;
}

cli_local_t *
cli_local_get ()
{
        cli_local_t     *local = NULL;

        local = GF_CALLOC (1, sizeof (*local), cli_mt_cli_local_t);
        LOCK_INIT (&local->lock);
        INIT_LIST_HEAD (&local->dict_list);

        return local;
}

void
cli_local_wipe (cli_local_t *local)
{
        if (local) {
                GF_FREE (local->get_vol.volname);
                if (local->dict)
                        dict_unref (local->dict);
                GF_FREE (local);
        }

        return;
}

struct cli_state *global_state;

int
main (int argc, char *argv[])
{
        struct cli_state   state = {0, };
        int                ret = -1;
        glusterfs_ctx_t   *ctx = NULL;

        ctx = glusterfs_ctx_new ();
        if (!ctx)
                return ENOMEM;

#ifdef DEBUG
        gf_mem_acct_enable_set (ctx);
#endif

        ret = glusterfs_globals_init (ctx);
        if (ret)
                return ret;

	THIS->ctx = ctx;

        ret = glusterfs_ctx_defaults_init (ctx);
        if (ret)
                goto out;

        cli_default_conn_timeout = 120;
        cli_ten_minutes_timeout = 600;

        ret = cli_state_init (&state);
        if (ret)
                goto out;

        state.ctx = ctx;
        global_state = &state;

        ret = parse_cmdline (argc, argv, &state);
        if (ret)
                goto out;

        ret = logging_init (ctx, &state);
        if (ret)
                goto out;

        gf_log ("cli", GF_LOG_INFO, "Started running %s with version %s",
                argv[0], PACKAGE_VERSION);

        global_rpc = cli_rpc_init (&state);
        if (!global_rpc)
                goto out;

        global_quotad_rpc = cli_quotad_clnt_rpc_init ();
        if (!global_quotad_rpc)
                goto out;

        ret = cli_cmds_register (&state);
        if (ret)
                goto out;

        ret = cli_cmd_cond_init ();
        if (ret)
                goto out;

        ret = cli_input_init (&state);
        if (ret)
                goto out;

        ret = event_dispatch (ctx->event_pool);

out:
//        glusterfs_ctx_destroy (ctx);

        return ret;
}

void
cli_print_line (int len)
{
        GF_ASSERT (len > 0);

        while (len--)
                printf ("-");

        printf ("\n");
}

void
print_quota_list_header (int type)
{
        if (type == GF_QUOTA_OPTION_TYPE_LIST) {
                cli_out ("                  Path                   Hard-limit "
                         " Soft-limit      Used  Available  Soft-limit "
                         "exceeded? Hard-limit exceeded?");
                cli_out ("-----------------------------------------------------"
                         "-----------------------------------------------------"
                         "---------------------");
        } else {
                cli_out ("                  Path                   Hard-limit  "
                         " Soft-limit      Files       Dirs     Available  "
                         "Soft-limit exceeded? Hard-limit exceeded?");
                cli_out ("-----------------------------------------------------"
                         "-----------------------------------------------------"
                         "-------------------------------------");
        }
}

void
print_quota_list_empty (char *path, int type)
{
        if (type == GF_QUOTA_OPTION_TYPE_LIST)
                cli_out ("%-40s %7s %9s %10s %7s %15s %20s", path,
                         "N/A", "N/A", "N/A", "N/A", "N/A", "N/A");
        else
                cli_out ("%-40s %9s %9s %12s %10s %10s %15s %20s", path,
                         "N/A", "N/A", "N/A", "N/A", "N/A", "N/A", "N/A");
}