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/*
Copyright (c) 2011-2012 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 _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "common-utils.h"
#include "cli1-xdr.h"
#include "xdr-generic.h"
#include "glusterd.h"
#include "glusterd-op-sm.h"
#include "glusterd-store.h"
#include "glusterd-utils.h"
#include "glusterd-volgen.h"
#include "run.h"
#include "syscall.h"
#include "byte-order.h"
#include "compat-errno.h"
#include <sys/wait.h>
#include <dlfcn.h>
const char *gd_bitrot_op_list[GF_BITROT_OPTION_TYPE_MAX] = {
[GF_BITROT_OPTION_TYPE_NONE] = "none",
[GF_BITROT_OPTION_TYPE_ENABLE] = "enable",
[GF_BITROT_OPTION_TYPE_DISABLE] = "disable",
[GF_BITROT_OPTION_TYPE_SCRUB_THROTTLE] = "scrub-throttle",
[GF_BITROT_OPTION_TYPE_SCRUB_FREQ] = "scrub-frequency",
[GF_BITROT_OPTION_TYPE_SCRUB] = "scrub",
};
int
__glusterd_handle_bitrot (rpcsvc_request_t *req)
{
int32_t ret = -1;
gf_cli_req cli_req = { {0,} };
dict_t *dict = NULL;
glusterd_op_t cli_op = GD_OP_BITROT;
char *volname = NULL;
int32_t type = 0;
char msg[2048] = {0,};
xlator_t *this = NULL;
glusterd_conf_t *conf = NULL;
GF_ASSERT (req);
this = THIS;
GF_ASSERT (this);
conf = this->private;
GF_ASSERT (conf);
ret = xdr_to_generic (req->msg[0], &cli_req, (xdrproc_t)xdr_gf_cli_req);
if (ret < 0) {
req->rpc_err = GARBAGE_ARGS;
goto out;
}
if (cli_req.dict.dict_len) {
/* Unserialize the dictionary */
dict = dict_new ();
ret = dict_unserialize (cli_req.dict.dict_val,
cli_req.dict.dict_len,
&dict);
if (ret < 0) {
gf_log (this->name, GF_LOG_ERROR, "failed to "
"unserialize req-buffer to dictionary");
snprintf (msg, sizeof (msg), "Unable to decode the "
"command");
goto out;
} else {
dict->extra_stdfree = cli_req.dict.dict_val;
}
}
ret = dict_get_str (dict, "volname", &volname);
if (ret) {
snprintf (msg, sizeof (msg), "Unable to get volume name");
gf_log (this->name, GF_LOG_ERROR, "Unable to get volume name, "
"while handling bitrot command");
goto out;
}
ret = dict_get_int32 (dict, "type", &type);
if (ret) {
snprintf (msg, sizeof (msg), "Unable to get type of command");
gf_log (this->name, GF_LOG_ERROR, "Unable to get type of cmd, "
"while handling bitrot command");
goto out;
}
if (conf->op_version < GD_OP_VERSION_3_7_0) {
snprintf (msg, sizeof (msg), "Cannot execute command. The "
"cluster is operating at version %d. Bitrot command "
"%s is unavailable in this version", conf->op_version,
gd_bitrot_op_list[type]);
ret = -1;
goto out;
}
ret = glusterd_op_begin_synctask (req, GD_OP_BITROT, dict);
out:
if (ret) {
if (msg[0] == '\0')
snprintf (msg, sizeof (msg), "Bitrot operation failed");
ret = glusterd_op_send_cli_response (cli_op, ret, 0, req,
dict, msg);
}
return ret;
}
int
glusterd_handle_bitrot (rpcsvc_request_t *req)
{
return glusterd_big_locked_handler (req, __glusterd_handle_bitrot);
}
static int
glusterd_bitrot_enable (glusterd_volinfo_t *volinfo, char **op_errstr)
{
int32_t ret = -1;
xlator_t *this = NULL;
this = THIS;
GF_ASSERT (this);
GF_VALIDATE_OR_GOTO (this->name, volinfo, out);
GF_VALIDATE_OR_GOTO (this->name, op_errstr, out);
if (glusterd_is_volume_started (volinfo) == 0) {
*op_errstr = gf_strdup ("Volume is stopped, start volume "
"to enable bitrot.");
ret = -1;
goto out;
}
ret = glusterd_is_bitrot_enabled (volinfo);
if (ret) {
*op_errstr = gf_strdup ("Bitrot is already enabled");
ret = -1;
goto out;
}
ret = dict_set_dynstr_with_alloc (volinfo->dict, VKEY_FEATURES_BITROT,
"on");
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "dict set failed");
goto out;
}
ret = 0;
out:
if (ret && op_errstr && !*op_errstr)
gf_asprintf (op_errstr, "Enabling bitrot on volume %s has been "
"unsuccessful", volinfo->volname);
return ret;
}
static int
glusterd_bitrot_disable (glusterd_volinfo_t *volinfo, char **op_errstr)
{
int32_t ret = -1;
xlator_t *this = NULL;
GF_VALIDATE_OR_GOTO (this->name, volinfo, out);
GF_VALIDATE_OR_GOTO (this->name, op_errstr, out);
ret = dict_set_dynstr_with_alloc (volinfo->dict, VKEY_FEATURES_BITROT,
"off");
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "dict set failed");
goto out;
}
ret = 0;
out:
if (ret && op_errstr && !*op_errstr)
gf_asprintf (op_errstr, "Disabling bitrot on volume %s has "
"been unsuccessful", volinfo->volname);
return ret;
}
static int
glusterd_manage_bitrot (int opcode)
{
int ret = -1;
xlator_t *this = NULL;
glusterd_conf_t *priv = NULL;
this = THIS;
GF_ASSERT (this);
priv = this->private;
GF_ASSERT (priv);
switch (opcode) {
case GF_BITROT_OPTION_TYPE_ENABLE:
/* TO DO:
* Start bitd service. once bitd volfile generation patch
* merge or this patch become dependent of bitd volfile
* generation patch below comment will remove.
* http://review.gluster.org/#/c/9710/
*/
/*ret = priv->bitd_svc.manager (&(priv->bitd_svc),
NULL, PROC_START);*/
case GF_BITROT_OPTION_TYPE_DISABLE:
/* TO DO:
* Stop bitd service. once bitd volfile generation patch
* merge or this patch become dependent of bitd volfile
* generation patch below comment will remove.
* http://review.gluster.org/#/c/9710/
*/
/*if (glusterd_all_volumes_with_bitrot_stopped ())
ret = glusterd_svc_stop (&(priv->bitd_svc),
SIGTERM);
*/
ret = 0;
break;
default:
ret = 0;
break;
}
return ret;
}
int
glusterd_op_bitrot (dict_t *dict, char **op_errstr, dict_t *rsp_dict)
{
glusterd_volinfo_t *volinfo = NULL;
int32_t ret = -1;
char *volname = NULL;
int type = -1;
glusterd_conf_t *priv = NULL;
xlator_t *this = NULL;
GF_ASSERT (dict);
GF_ASSERT (op_errstr);
this = THIS;
GF_ASSERT (this);
priv = this->private;
GF_ASSERT (priv);
ret = dict_get_str (dict, "volname", &volname);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "Unable to get volume name");
goto out;
}
ret = glusterd_volinfo_find (volname, &volinfo);
if (ret) {
gf_asprintf (op_errstr, FMTSTR_CHECK_VOL_EXISTS, volname);
goto out;
}
ret = dict_get_int32 (dict, "type", &type);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "Unable to get type from "
"dict");
goto out;
}
switch (type) {
case GF_BITROT_OPTION_TYPE_ENABLE:
ret = glusterd_bitrot_enable (volinfo, op_errstr);
if (ret < 0)
goto out;
break;
case GF_BITROT_OPTION_TYPE_DISABLE:
ret = glusterd_bitrot_disable (volinfo, op_errstr);
if (ret < 0)
goto out;
break;
default:
gf_asprintf (op_errstr, "Bitrot command failed. Invalid "
"opcode");
ret = -1;
goto out;
}
ret = glusterd_manage_bitrot (type);
if (ret)
goto out;
ret = glusterd_create_volfiles_and_notify_services (volinfo);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "Unable to re-create "
"volfiles");
ret = -1;
goto out;
}
ret = glusterd_store_volinfo (volinfo,
GLUSTERD_VOLINFO_VER_AC_INCREMENT);
if (ret) {
gf_log (this->name, GF_LOG_DEBUG, "Failed to store volinfo for "
"bitrot");
goto out;
}
out:
return ret;
}
int
glusterd_op_stage_bitrot (dict_t *dict, char **op_errstr, dict_t *rsp_dict)
{
int ret = 0;
char *volname = NULL;
int type = 0;
xlator_t *this = NULL;
glusterd_conf_t *priv = NULL;
glusterd_volinfo_t *volinfo = NULL;
this = THIS;
GF_ASSERT (this);
priv = this->private;
GF_ASSERT (priv);
GF_ASSERT (dict);
GF_ASSERT (op_errstr);
ret = dict_get_str (dict, "volname", &volname);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "Unable to get volume name");
goto out;
}
ret = glusterd_volinfo_find (volname, &volinfo);
if (ret) {
gf_asprintf (op_errstr, FMTSTR_CHECK_VOL_EXISTS, volname);
goto out;
}
if (!glusterd_is_volume_started (volinfo)) {
*op_errstr = gf_strdup ("Volume is stopped, start volume "
"before executing bit rot command.");
ret = -1;
goto out;
}
ret = dict_get_int32 (dict, "type", &type);
if (ret) {
gf_log (this->name, GF_LOG_ERROR, "Unable to get type for "
"operation");
*op_errstr = gf_strdup ("Staging stage failed for bitrot "
"operation.");
goto out;
}
if ((GF_BITROT_OPTION_TYPE_ENABLE != type) &&
(glusterd_is_bitrot_enabled (volinfo) == 0)) {
ret = -1;
gf_asprintf (op_errstr, "Bitrot is not enabled on volume %s",
volname);
goto out;
}
out:
if (ret && op_errstr && *op_errstr)
gf_log (this->name, GF_LOG_ERROR, "%s", *op_errstr);
gf_log (this->name, GF_LOG_DEBUG, "Returning %d", ret);
return ret;
}
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