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/*
Copyright (c) 2015 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 "bit-rot-ssm.h"
#include "bit-rot-scrub.h"
#include "bit-rot-bitd-messages.h"
int br_scrub_ssm_noop (xlator_t *this, br_child_t *child)
{
return 0;
}
int
br_scrub_ssm_state_pause (xlator_t *this, br_child_t *child)
{
gf_msg (this->name, GF_LOG_INFO, 0, BRB_MSG_GENERIC_SSM_INFO,
"Scrubber paused [Brick: %s]", child->brick_path);
_br_child_set_scrub_state (child, BR_SCRUB_STATE_PAUSED);
return 0;
}
int
br_scrub_ssm_state_ipause (xlator_t *this, br_child_t *child)
{
gf_msg (this->name, GF_LOG_INFO, 0, BRB_MSG_GENERIC_SSM_INFO,
"Scrubber paused [Brick: %s]", child->brick_path);
_br_child_set_scrub_state (child, BR_SCRUB_STATE_IPAUSED);
return 0;
}
int
br_scrub_ssm_state_active (xlator_t *this, br_child_t *child)
{
struct br_scanfs *fsscan = &child->fsscan;
if (fsscan->over) {
(void) br_fsscan_activate (this, child);
} else {
gf_msg (this->name, GF_LOG_INFO, 0, BRB_MSG_GENERIC_SSM_INFO,
"Scrubbing resumed [Brick %s]", child->brick_path);
_br_child_set_scrub_state (child, BR_SCRUB_STATE_ACTIVE);
}
return 0;
}
int
br_scrub_ssm_state_stall (xlator_t *this, br_child_t *child)
{
gf_msg (this->name, GF_LOG_INFO, 0, BRB_MSG_GENERIC_SSM_INFO,
"Brick [%s] is under active scrubbing. Pausing scrub..",
child->brick_path);
_br_child_set_scrub_state (child, BR_SCRUB_STATE_STALLED);
return 0;
}
static br_scrub_ssm_call *
br_scrub_ssm[BR_SCRUB_MAXSTATES][BR_SCRUB_MAXEVENTS] = {
{br_fsscan_schedule, br_scrub_ssm_state_ipause}, /* INACTIVE */
{br_fsscan_reschedule, br_fsscan_deactivate}, /* PENDING */
{br_scrub_ssm_noop, br_scrub_ssm_state_stall}, /* ACTIVE */
{br_fsscan_activate, br_scrub_ssm_noop}, /* PAUSED */
{br_fsscan_schedule, br_scrub_ssm_noop}, /* IPAUSED */
{br_scrub_ssm_state_active, br_scrub_ssm_noop}, /* STALLED */
};
int32_t
br_scrub_state_machine (xlator_t *this, br_child_t *child)
{
br_private_t *priv = NULL;
br_scrub_ssm_call *call = NULL;
struct br_scanfs *fsscan = NULL;
struct br_scrubber *fsscrub = NULL;
br_scrub_state_t currstate = 0;
br_scrub_event_t event = 0;
priv = this->private;
fsscan = &child->fsscan;
fsscrub = &priv->fsscrub;
currstate = fsscan->state;
event = _br_child_get_scrub_event (fsscrub);
call = br_scrub_ssm[currstate][event];
return call (this, child);
}
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