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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.
*/
#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 "glusterd-messages.h"
#include "syscall.h"
#include <signal.h>
int
__glusterd_handle_log_rotate (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_LOG_ROTATE;
char *volname = NULL;
char msg[2048] = {0,};
xlator_t *this = NULL;
GF_ASSERT (req);
this = THIS;
GF_ASSERT (this);
ret = xdr_to_generic (req->msg[0], &cli_req, (xdrproc_t)xdr_gf_cli_req);
if (ret < 0) {
//failed to decode msg;
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_msg (this->name, GF_LOG_ERROR, 0,
GD_MSG_DICT_UNSERIALIZE_FAIL,
"failed to "
"unserialize req-buffer to dictionary");
snprintf (msg, sizeof (msg), "Unable to decode the "
"command");
goto out;
}
}
ret = dict_get_str (dict, "volname", &volname);
if (ret) {
snprintf (msg, sizeof (msg), "Failed to get volume name");
gf_msg (this->name, GF_LOG_ERROR, 0,
GD_MSG_DICT_GET_FAILED, "%s", msg);
goto out;
}
gf_msg (this->name, GF_LOG_INFO, 0,
GD_MSG_LOG_ROTATE_REQ_RECVD,
"Received log rotate req "
"for volume %s", volname);
ret = dict_set_uint64 (dict, "rotate-key", (uint64_t)time (NULL));
if (ret)
goto out;
ret = glusterd_op_begin_synctask (req, GD_OP_LOG_ROTATE, dict);
out:
if (ret) {
if (msg[0] == '\0')
snprintf (msg, sizeof (msg), "Operation failed");
ret = glusterd_op_send_cli_response (cli_op, ret, 0, req,
dict, msg);
}
free (cli_req.dict.dict_val);
return ret;
}
int
glusterd_handle_log_rotate (rpcsvc_request_t *req)
{
return glusterd_big_locked_handler (req,
__glusterd_handle_log_rotate);
}
/* op-sm */
int
glusterd_op_stage_log_rotate (dict_t *dict, char **op_errstr)
{
int ret = -1;
char *volname = NULL;
glusterd_volinfo_t *volinfo = NULL;
gf_boolean_t exists = _gf_false;
char msg[2048] = {0};
char *brick = NULL;
ret = dict_get_str (dict, "volname", &volname);
if (ret) {
gf_msg ("glusterd", GF_LOG_ERROR, 0,
GD_MSG_DICT_GET_FAILED, "Unable to get volume name");
goto out;
}
exists = glusterd_check_volume_exists (volname);
ret = glusterd_volinfo_find (volname, &volinfo);
if (!exists) {
snprintf (msg, sizeof (msg), "Volume %s does not exist",
volname);
gf_msg ("glusterd", GF_LOG_ERROR, 0,
GD_MSG_VOL_NOT_FOUND, "%s", msg);
*op_errstr = gf_strdup (msg);
ret = -1;
goto out;
}
if (_gf_false == glusterd_is_volume_started (volinfo)) {
snprintf (msg, sizeof (msg), "Volume %s needs to be started before"
" log rotate.", volname);
gf_msg ("glusterd", GF_LOG_ERROR, 0,
GD_MSG_VOL_NOT_STARTED, "%s", msg);
*op_errstr = gf_strdup (msg);
ret = -1;
goto out;
}
ret = dict_get_str (dict, "brick", &brick);
/* If no brick is specified, do log-rotate for
all the bricks in the volume */
if (ret) {
ret = 0;
goto out;
}
ret = glusterd_volume_brickinfo_get_by_brick (brick, volinfo, NULL,
_gf_false);
if (ret) {
snprintf (msg, sizeof (msg), "Incorrect brick %s "
"for volume %s", brick, volname);
gf_msg ("glusterd", GF_LOG_ERROR, EINVAL,
GD_MSG_INVALID_ENTRY, "%s", msg);
*op_errstr = gf_strdup (msg);
goto out;
}
out:
gf_msg_debug ("glusterd", 0, "Returning %d", ret);
return ret;
}
int
glusterd_op_log_rotate (dict_t *dict)
{
int ret = -1;
glusterd_conf_t *priv = NULL;
glusterd_volinfo_t *volinfo = NULL;
glusterd_brickinfo_t *brickinfo = NULL;
xlator_t *this = NULL;
char *volname = NULL;
char *brick = NULL;
char logfile[PATH_MAX] = {0,};
char pidfile[PATH_MAX] = {0,};
FILE *file = NULL;
pid_t pid = 0;
uint64_t key = 0;
int valid_brick = 0;
glusterd_brickinfo_t *tmpbrkinfo = NULL;
this = THIS;
GF_ASSERT (this);
priv = this->private;
GF_ASSERT (priv);
ret = dict_get_str (dict, "volname", &volname);
if (ret) {
gf_msg ("glusterd", GF_LOG_ERROR, 0,
GD_MSG_DICT_GET_FAILED, "volname not found");
goto out;
}
ret = dict_get_uint64 (dict, "rotate-key", &key);
if (ret) {
gf_msg ("glusterd", GF_LOG_ERROR, 0,
GD_MSG_DICT_GET_FAILED, "rotate key not found");
goto out;
}
ret = dict_get_str (dict, "brick", &brick);
/* If no brick is specified, do log-rotate for
all the bricks in the volume */
if (ret)
goto cont;
ret = glusterd_brickinfo_new_from_brick (brick, &tmpbrkinfo,
_gf_false, NULL);
if (ret) {
gf_msg ("glusterd", GF_LOG_ERROR, 0,
GD_MSG_BRICK_NOT_FOUND,
"cannot get brickinfo from brick");
goto out;
}
cont:
ret = glusterd_volinfo_find (volname, &volinfo);
if (ret)
goto out;
ret = -1;
cds_list_for_each_entry (brickinfo, &volinfo->bricks, brick_list) {
if (gf_uuid_compare (brickinfo->uuid, MY_UUID))
continue;
if (brick &&
(strcmp (tmpbrkinfo->hostname, brickinfo->hostname) ||
strcmp (tmpbrkinfo->path,brickinfo->path)))
continue;
valid_brick = 1;
GLUSTERD_GET_BRICK_PIDFILE (pidfile, volinfo, brickinfo, priv);
file = fopen (pidfile, "r+");
if (!file) {
gf_msg ("glusterd", GF_LOG_ERROR, errno,
GD_MSG_FILE_OP_FAILED, "Unable to open pidfile: %s",
pidfile);
ret = -1;
goto out;
}
ret = fscanf (file, "%d", &pid);
if (ret <= 0) {
fclose (file);
gf_msg ("glusterd", GF_LOG_ERROR, errno,
GD_MSG_FILE_OP_FAILED, "Unable to read pidfile: %s",
pidfile);
ret = -1;
goto out;
}
fclose (file);
file = NULL;
snprintf (logfile, PATH_MAX, "%s.%"PRIu64,
brickinfo->logfile, key);
ret = sys_rename (brickinfo->logfile, logfile);
if (ret)
gf_msg ("glusterd", GF_LOG_WARNING, errno,
GD_MSG_FILE_OP_FAILED, "rename failed");
ret = kill (pid, SIGHUP);
if (ret) {
gf_msg ("glusterd", GF_LOG_ERROR, errno,
GD_MSG_PID_KILL_FAIL, "Unable to SIGHUP to %d", pid);
goto out;
}
ret = 0;
/* If request was for brick, only one iteration is enough */
if (brick)
break;
}
if (ret && !valid_brick)
ret = 0;
out:
if (tmpbrkinfo)
glusterd_brickinfo_delete (tmpbrkinfo);
return ret;
}
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