path: root/xlators/mgmt/glusterd/src/glusterd.h

/*
   Copyright (c) 2006-2012 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.
*/
#ifndef _GLUSTERD_H_
#define _GLUSTERD_H_

#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif

#include <sys/types.h>
#include <dirent.h>
#include <pthread.h>
#include <libgen.h>

#include "uuid.h"

#include "rpc-clnt.h"
#include "glusterfs.h"
#include "xlator.h"
#include "logging.h"
#include "call-stub.h"
#include "fd.h"
#include "byte-order.h"
#include "glusterd-mem-types.h"
#include "rpcsvc.h"
#include "glusterd-sm.h"
#include "glusterd1-xdr.h"
#include "protocol-common.h"
#include "glusterd-pmap.h"
#include "cli1-xdr.h"
#include "syncop.h"

#define GLUSTERD_MAX_VOLUME_NAME        1000
#define DEFAULT_LOG_FILE_DIRECTORY      DATADIR "/log/glusterfs"
#define GLUSTERD_TR_LOG_SIZE            50
#define GLUSTERD_NAME                   "glusterd"
#define GLUSTERD_SOCKET_LISTEN_BACKLOG  128
#define GLUSTERD_QUORUM_TYPE_KEY        "cluster.server-quorum-type"
#define GLUSTERD_QUORUM_RATIO_KEY       "cluster.server-quorum-ratio"
#define GLUSTERD_GLOBAL_OPT_VERSION     "global-option-version"

#define GLUSTERD_SERVER_QUORUM "server"

struct glusterd_volinfo_;
typedef struct glusterd_volinfo_ glusterd_volinfo_t;

typedef enum glusterd_op_ {
        GD_OP_NONE = 0,
        GD_OP_CREATE_VOLUME,
        GD_OP_START_BRICK,
        GD_OP_STOP_BRICK,
        GD_OP_DELETE_VOLUME,
        GD_OP_START_VOLUME,
        GD_OP_STOP_VOLUME,
        GD_OP_DEFRAG_VOLUME,
        GD_OP_ADD_BRICK,
        GD_OP_REMOVE_BRICK,
        GD_OP_REPLACE_BRICK,
        GD_OP_SET_VOLUME,
        GD_OP_RESET_VOLUME,
        GD_OP_SYNC_VOLUME,
        GD_OP_LOG_ROTATE,
        GD_OP_GSYNC_SET,
        GD_OP_PROFILE_VOLUME,
        GD_OP_QUOTA,
        GD_OP_STATUS_VOLUME,
        GD_OP_REBALANCE,
        GD_OP_HEAL_VOLUME,
        GD_OP_STATEDUMP_VOLUME,
        GD_OP_LIST_VOLUME,
        GD_OP_CLEARLOCKS_VOLUME,
        GD_OP_DEFRAG_BRICK_VOLUME,
        GD_OP_MAX,
} glusterd_op_t;

struct glusterd_store_iter_ {
        int     fd;
        FILE    *file;
        char    filepath[PATH_MAX];
};

typedef struct glusterd_store_iter_     glusterd_store_iter_t;

struct glusterd_volgen {
        dict_t *dict;
};

typedef struct {
        struct rpc_clnt         *rpc;
        gf_boolean_t            running;
} nodesrv_t;

#define GD_OP_VERSION_KEY     "operating-version"
#define GD_MIN_OP_VERSION_KEY "minimum-operating-version"
#define GD_MAX_OP_VERSION_KEY "maxium-operating-version"

/* Gluster versions - OP-VERSION mapping
 *
 * 3.3.0                - 1
 * 3.3.Next/3.Next      - 2
 *
 * (TODO: Change above comment once gluster version is finalised)
 */
#define GD_OP_VERSION_MIN  1 /* MIN is the fresh start op-version, mostly
                                should not change */
#define GD_OP_VERSION_MAX  2 /* MAX VERSION is the maximum count in VME table,
                                should keep changing with introduction of newer
                                versions */

typedef struct {
        gf_boolean_t    quorum;
        double          quorum_ratio;
        uint64_t        gl_opt_version;
} 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;
        glusterd_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;
#ifdef DEBUG
        gf_boolean_t      valgrind;
#endif
        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;
} glusterd_conf_t;


typedef enum gf_brick_status {
        GF_BRICK_STOPPED,
        GF_BRICK_STARTED,
} 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;
        glusterd_store_handle_t *shandle;
        gf_brick_status_t status;
        struct rpc_clnt *rpc;
        int decommissioned;
};

typedef struct glusterd_brickinfo glusterd_brickinfo_t;

struct gf_defrag_brickinfo_ {
        char *name;
        int   files;
        int   size;
};

typedef int (*defrag_cbk_fn_t) (glusterd_volinfo_t *volinfo,
                                gf_defrag_status_t status);

struct glusterd_defrag_info_ {
        uint64_t                     total_files;
        uint64_t                     total_data;
        uint64_t                     num_files_lookedup;
        uint64_t                     total_failures;
        gf_lock_t                    lock;
        int                          cmd;
        pthread_t                    th;
        gf_defrag_status_t           defrag_status;
        struct rpc_clnt            * rpc;
        uint32_t                     connected;
        char                         mount[1024];
        char                         databuf[131072];
        struct gf_defrag_brickinfo_ *bricks; /* volinfo->brick_count */

        defrag_cbk_fn_t              cbk_fn;
};


typedef struct glusterd_defrag_info_ glusterd_defrag_info_t;

typedef enum gf_transport_type_ {
        GF_TRANSPORT_TCP,       //DEFAULT
        GF_TRANSPORT_RDMA,
        GF_TRANSPORT_BOTH_TCP_RDMA,
} gf_transport_type;

#define GF_DEFAULT_NFS_TRANSPORT  GF_TRANSPORT_RDMA

typedef enum gf_rb_status_ {
        GF_RB_STATUS_NONE,
        GF_RB_STATUS_STARTED,
        GF_RB_STATUS_PAUSED,
} gf_rb_status_t;

struct _auth {
        char       *username;
        char       *password;
};

typedef struct _auth auth_t;

typedef enum glusterd_vol_backend_ {
        GD_VOL_BK_DEFAULT = 0, /* POSIX */
        GD_VOL_BK_BD = 1,
} glusterd_vol_backend_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                     dist_leaf_count; /* Number of bricks in one
                                                    distribute subvolume */
        int                     port;
        glusterd_store_handle_t *shandle;
        glusterd_store_handle_t *rb_shandle;
        glusterd_store_handle_t *node_state_shandle;

        /* Defrag/rebalance related */
        gf_defrag_status_t      defrag_status;
        uint64_t                rebalance_files;
        uint64_t                rebalance_data;
        uint64_t                lookedup_files;
        glusterd_defrag_info_t  *defrag;
        gf_cli_defrag_type      defrag_cmd;
        uint64_t                rebalance_failures;
        double                  rebalance_time;

        /* Replace brick status */
        gf_rb_status_t          rb_status;
        glusterd_brickinfo_t    *src_brick;
        glusterd_brickinfo_t    *dst_brick;

        int                     version;
        uint32_t                cksum;
        gf_transport_type       transport_type;
        gf_transport_type   nfs_transport_type;

        dict_t                  *dict;

        uuid_t                  volume_id;
        auth_t                  auth;
        char                    *logdir;

        dict_t                  *gsync_slaves;

        int                      decommission_in_progress;
        xlator_t                *xl;

        gf_boolean_t             memory_accounting;
        glusterd_vol_backend_t   backend;
};

typedef enum gd_node_type_ {
        GD_NODE_NONE,
        GD_NODE_BRICK,
        GD_NODE_SHD,
        GD_NODE_REBALANCE,
        GD_NODE_NFS,
} gd_node_type;

typedef struct glusterd_pending_node_ {
        struct list_head list;
        void   *node;
        gd_node_type type;
        int32_t index;
} glusterd_pending_node_t;

enum glusterd_op_ret {
        GLUSTERD_CONNECTION_AWAITED = 100,
};

enum glusterd_vol_comp_status_ {
        GLUSTERD_VOL_COMP_NONE = 0,
        GLUSTERD_VOL_COMP_SCS = 1,
        GLUSTERD_VOL_COMP_UPDATE_REQ,
        GLUSTERD_VOL_COMP_RJT,
};

#define GLUSTERD_DEFAULT_WORKDIR "/var/lib/glusterd"
#define GLUSTERD_DEFAULT_PORT    GF_DEFAULT_BASE_PORT
#define GLUSTERD_INFO_FILE      "glusterd.info"
#define GLUSTERD_VOLUME_DIR_PREFIX "vols"
#define GLUSTERD_PEER_DIR_PREFIX "peers"
#define GLUSTERD_VOLUME_INFO_FILE "info"
#define GLUSTERD_VOLUME_RBSTATE_FILE "rbstate"
#define GLUSTERD_BRICK_INFO_DIR "bricks"
#define GLUSTERD_CKSUM_FILE "cksum"
#define GLUSTERD_NODE_STATE_FILE "node_state.info"

/* definitions related to replace brick */
#define RB_CLIENT_MOUNTPOINT    "rb_mount"
#define RB_CLIENTVOL_FILENAME   "rb_client.vol"
#define RB_DSTBRICK_PIDFILE     "rb_dst_brick.pid"
#define RB_DSTBRICKVOL_FILENAME "rb_dst_brick.vol"
#define RB_PUMP_DEF_ARG         "default"

#define GLUSTERD_UUID_LEN 50

typedef ssize_t (*gd_serialize_t) (struct iovec outmsg, void *args);

#define GLUSTERD_GET_VOLUME_DIR(path, volinfo, priv) \
        snprintf (path, PATH_MAX, "%s/vols/%s", priv->workdir,\
                  volinfo->volname);

#define GLUSTERD_GET_BRICK_DIR(path, volinfo, priv) \
        snprintf (path, PATH_MAX, "%s/%s/%s/%s", priv->workdir,\
                  GLUSTERD_VOLUME_DIR_PREFIX, volinfo->volname, \
                  GLUSTERD_BRICK_INFO_DIR);

#define GLUSTERD_GET_NFS_DIR(path, priv) \
        snprintf (path, PATH_MAX, "%s/nfs", priv->workdir);

#define GLUSTERD_REMOVE_SLASH_FROM_PATH(path,string) do {               \
                int i = 0;                                              \
                for (i = 1; i < strlen (path); i++) {                   \
                        string[i-1] = path[i];                          \
                        if (string[i-1] == '/')                         \
                                string[i-1] = '-';                      \
                }                                                       \
        } while (0)

#define GLUSTERD_GET_BRICK_PIDFILE(pidfile,volpath,hostname,brickpath) { \
                char exp_path[PATH_MAX] = {0,};                         \
                GLUSTERD_REMOVE_SLASH_FROM_PATH (brickpath, exp_path);  \
                snprintf (pidfile, PATH_MAX, "%s/run/%s-%s.pid",        \
                          volpath, hostname, exp_path);                 \
        }

#define GLUSTERD_GET_NFS_PIDFILE(pidfile,nfspath) {                     \
                snprintf (pidfile, PATH_MAX, "%s/run/nfs.pid",          \
                          nfspath);                                     \
        }

#define GLUSTERD_STACK_DESTROY(frame) do {\
		frame->local = NULL;	  \
		STACK_DESTROY (frame->root);\
	} while (0)

#define GLUSTERD_GET_DEFRAG_DIR(path, volinfo, priv) do {               \
                char vol_path[PATH_MAX];                                \
                GLUSTERD_GET_VOLUME_DIR(vol_path, volinfo, priv);       \
                snprintf (path, PATH_MAX, "%s/rebalance",vol_path);     \
        } while (0)

#define GLUSTERD_GET_DEFRAG_SOCK_FILE(path, volinfo, priv) do {         \
                char defrag_path[PATH_MAX];                             \
                GLUSTERD_GET_DEFRAG_DIR(defrag_path, volinfo, priv);    \
                snprintf (path, PATH_MAX, "%s/%s.sock", defrag_path,    \
                           uuid_utoa(MY_UUID));                         \
        } while (0)

#define GLUSTERD_GET_DEFRAG_PID_FILE(path, volinfo, priv) do {          \
                char defrag_path[PATH_MAX];                             \
                GLUSTERD_GET_DEFRAG_DIR(defrag_path, volinfo, priv);    \
                snprintf (path, PATH_MAX, "%s/%s.pid", defrag_path,     \
                           uuid_utoa(MY_UUID));                         \
        } while (0)


int glusterd_uuid_init();

int glusterd_uuid_generate_save ();

#define MY_UUID (__glusterd_uuid())

static inline unsigned char *
__glusterd_uuid()
{
	glusterd_conf_t *priv = THIS->private;

	if (uuid_is_null (priv->uuid))
		glusterd_uuid_init();
	return &priv->uuid[0];
}

int32_t
glusterd_brick_from_brickinfo (glusterd_brickinfo_t *brickinfo,
                               char **new_brick);
int
glusterd_probe_begin (rpcsvc_request_t *req, const char *hoststr, int port);

int
glusterd_xfer_friend_add_resp (rpcsvc_request_t *req, char *hostname,
                               int port, int32_t op_ret, int32_t op_errno);

int
glusterd_friend_find (uuid_t uuid, char *hostname,
                      glusterd_peerinfo_t **peerinfo);

int
glusterd_friend_add (const char *hoststr, int port,
                     glusterd_friend_sm_state_t state,
                     uuid_t *uuid, glusterd_peerinfo_t **friend,
                     gf_boolean_t restore, glusterd_peerctx_args_t *args);

int
glusterd_friend_rpc_create (xlator_t *this, glusterd_peerinfo_t *peerinfo,
                            glusterd_peerctx_args_t *args);
int
glusterd_friend_remove (uuid_t uuid, char *hostname);

int
glusterd_op_lock_send_resp (rpcsvc_request_t *req, int32_t status);

int
glusterd_op_unlock_send_resp (rpcsvc_request_t *req, int32_t status);

int
glusterd_op_stage_send_resp (rpcsvc_request_t *req,
                             int32_t op, int32_t status,
                             char *op_errstr, dict_t *rsp_dict);

int
glusterd_op_commmit_send_resp (rpcsvc_request_t *req,
                               int32_t op, int32_t status);

int32_t
glusterd_create_volume (rpcsvc_request_t *req, dict_t *dict);

int
glusterd_handle_incoming_friend_req (rpcsvc_request_t *req);

int
glusterd_handle_probe_query (rpcsvc_request_t *req);

int
glusterd_handle_cluster_lock (rpcsvc_request_t *req);

int
glusterd_handle_cluster_unlock (rpcsvc_request_t *req);

int
glusterd_handle_stage_op (rpcsvc_request_t *req);

int
glusterd_handle_commit_op (rpcsvc_request_t *req);

int
glusterd_handle_cli_probe (rpcsvc_request_t *req);

int
glusterd_handle_create_volume (rpcsvc_request_t *req);

int
glusterd_handle_defrag_volume (rpcsvc_request_t *req);

int
glusterd_handle_defrag_volume_v2 (rpcsvc_request_t *req);

int
glusterd_xfer_cli_probe_resp (rpcsvc_request_t *req, int32_t op_ret,
                              int32_t op_errno, char *op_errstr, char *hostname,
                              int port);

int
glusterd_op_commit_send_resp (rpcsvc_request_t *req,
                              int32_t op, int32_t status, char *op_errstr,
                              dict_t *rsp_dict);

int
glusterd_xfer_friend_remove_resp (rpcsvc_request_t *req, char *hostname, int port);

int
glusterd_deprobe_begin (rpcsvc_request_t *req, const char *hoststr, int port,
                        uuid_t uuid);

int
glusterd_handle_cli_deprobe (rpcsvc_request_t *req);

int
glusterd_handle_incoming_unfriend_req (rpcsvc_request_t *req);

int32_t
glusterd_list_friends (rpcsvc_request_t *req, dict_t *dict, int32_t flags);

int
glusterd_handle_cli_list_friends (rpcsvc_request_t *req);

int
glusterd_handle_cli_start_volume (rpcsvc_request_t *req);

int
glusterd_handle_friend_update (rpcsvc_request_t *req);

int
glusterd_handle_cli_stop_volume (rpcsvc_request_t *req);

int
glusterd_handle_cli_delete_volume (rpcsvc_request_t *req);

int
glusterd_handle_cli_get_volume (rpcsvc_request_t *req);

int32_t
glusterd_get_volumes (rpcsvc_request_t *req, dict_t *dict, int32_t flags);

int
glusterd_handle_add_brick (rpcsvc_request_t *req);

int
glusterd_handle_replace_brick (rpcsvc_request_t *req);

int
glusterd_handle_remove_brick (rpcsvc_request_t *req);

int
glusterd_handle_log_rotate (rpcsvc_request_t *req);

int
glusterd_handle_sync_volume (rpcsvc_request_t *req);

int32_t
glusterd_log_filename (rpcsvc_request_t *req, dict_t *dict);

int32_t
glusterd_log_rotate (rpcsvc_request_t *req, dict_t *dict);

int32_t
glusterd_remove_brick (rpcsvc_request_t *req, dict_t *dict);

int32_t
glusterd_set_volume (rpcsvc_request_t *req, dict_t *dict);

int32_t
glusterd_reset_volume (rpcsvc_request_t *req, dict_t *dict);

int32_t
glusterd_gsync_set (rpcsvc_request_t *req, dict_t *dict);

int32_t
glusterd_quota (rpcsvc_request_t *req, dict_t *dict);

int
glusterd_handle_set_volume (rpcsvc_request_t *req);

int
glusterd_handle_reset_volume (rpcsvc_request_t *req);

int
glusterd_handle_gsync_set (rpcsvc_request_t *req);

int
glusterd_handle_quota (rpcsvc_request_t *req);

int
glusterd_handle_fsm_log (rpcsvc_request_t *req);

int
glusterd_xfer_cli_deprobe_resp (rpcsvc_request_t *req, int32_t op_ret,
                                int32_t op_errno, char *op_errstr,
                                char *hostname);

int
glusterd_fetchspec_notify (xlator_t *this);

int
glusterd_add_volume_detail_to_dict (glusterd_volinfo_t *volinfo,
                                    dict_t  *volumes, int   count);

int
glusterd_restart_bricks (glusterd_conf_t *conf);

int32_t
glusterd_volume_txn (rpcsvc_request_t *req, char *volname, int flags,
                     glusterd_op_t op);

int
glusterd_peer_dump_version (xlator_t *this, struct rpc_clnt *rpc,
                            glusterd_peerctx_t *peerctx);

int
glusterd_validate_reconfopts (glusterd_volinfo_t *volinfo, dict_t *val_dict, char **op_errstr);
int
glusterd_handle_cli_profile_volume (rpcsvc_request_t *req);

int
glusterd_handle_getwd (rpcsvc_request_t *req);

int32_t
glusterd_set_volume (rpcsvc_request_t *req, dict_t *dict);
int
glusterd_peer_rpc_notify (struct rpc_clnt *rpc, void *mydata,
                          rpc_clnt_event_t event,
                          void *data);
int
glusterd_brick_rpc_notify (struct rpc_clnt *rpc, void *mydata,
                          rpc_clnt_event_t event, void *data);

int
glusterd_nodesvc_rpc_notify (struct rpc_clnt *rpc, void *mydata,
                             rpc_clnt_event_t event, void *data);

int
glusterd_rpc_create (struct rpc_clnt **rpc, dict_t *options,
                     rpc_clnt_notify_t notify_fn, void *notify_data);


/* handler functions */
int32_t glusterd_op_begin (rpcsvc_request_t *req, glusterd_op_t op, void *ctx);

/* removed other definitions as they have been defined elsewhere in this file*/

int glusterd_handle_cli_statedump_volume (rpcsvc_request_t *req);
int glusterd_handle_cli_clearlocks_volume (rpcsvc_request_t *req);

int glusterd_handle_defrag_start (glusterd_volinfo_t *volinfo, char *op_errstr,
                                  size_t len, int cmd, defrag_cbk_fn_t cbk);
int
glusterd_rebalance_rpc_create (glusterd_volinfo_t *volinfo,
                               glusterd_conf_t *priv, int cmd);

int glusterd_handle_cli_heal_volume (rpcsvc_request_t *req);

int glusterd_handle_cli_list_volume (rpcsvc_request_t *req);

/* op-sm functions */
int glusterd_op_stage_heal_volume (dict_t *dict, char **op_errstr);
int glusterd_op_heal_volume (dict_t *dict, char **op_errstr);
int glusterd_op_stage_gsync_set (dict_t *dict, char **op_errstr);
int glusterd_op_gsync_set (dict_t *dict, char **op_errstr, dict_t *rsp_dict);
int glusterd_op_quota (dict_t *dict, char **op_errstr);
int glusterd_op_stage_quota (dict_t *dict, char **op_errstr);
int glusterd_op_stage_replace_brick (dict_t *dict, char **op_errstr,
                                     dict_t *rsp_dict);
int glusterd_op_replace_brick (dict_t *dict, dict_t *rsp_dict);
int glusterd_op_log_rotate (dict_t *dict);
int glusterd_op_stage_log_rotate (dict_t *dict, char **op_errstr);
int glusterd_op_stage_create_volume (dict_t *dict, char **op_errstr);
int glusterd_op_stage_start_volume (dict_t *dict, char **op_errstr);
int glusterd_op_stage_stop_volume (dict_t *dict, char **op_errstr);
int glusterd_op_stage_delete_volume (dict_t *dict, char **op_errstr);
int glusterd_op_create_volume (dict_t *dict, char **op_errstr);
int glusterd_op_start_volume (dict_t *dict, char **op_errstr);
int glusterd_op_stop_volume (dict_t *dict);
int glusterd_op_delete_volume (dict_t *dict);

int glusterd_op_add_brick (dict_t *dict, char **op_errstr);
int glusterd_op_remove_brick (dict_t *dict, char **op_errstr);
int glusterd_op_stage_add_brick (dict_t *dict, char **op_errstr);
int glusterd_op_stage_remove_brick (dict_t *dict, char **op_errstr);

int glusterd_op_stage_rebalance (dict_t *dict, char **op_errstr);
int glusterd_op_rebalance (dict_t *dict, char **op_errstr, dict_t *rsp_dict);

int glusterd_op_stage_statedump_volume (dict_t *dict, char **op_errstr);
int glusterd_op_statedump_volume (dict_t *dict, char **op_errstr);

int glusterd_op_stage_clearlocks_volume (dict_t *dict, char **op_errstr);
int glusterd_op_clearlocks_volume (dict_t *dict, char **op_errstr);

/* misc */
void glusterd_do_replace_brick (void *data);
int glusterd_op_perform_remove_brick (glusterd_volinfo_t  *volinfo, char *brick,
                                      int force, int *need_migrate);
int glusterd_op_stop_volume_args_get (dict_t *dict, char** volname, int *flags);
int glusterd_op_statedump_volume_args_get (dict_t *dict, char **volname,
                                           char **options, int *option_cnt);

int glusterd_op_gsync_args_get (dict_t *dict, char **op_errstr,
                                char **master, char **slave);
/* Synctask part */
int32_t glusterd_op_begin_synctask (rpcsvc_request_t *req, glusterd_op_t op,
                                    void *dict);
int32_t
glusterd_defrag_event_notify_handle (dict_t *dict);
#endif