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/*
Copyright (c) 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
This file is part of GlusterFS.
GlusterFS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
GlusterFS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
#include "saved-frames.h"
#include "common-utils.h"
#include "protocol.h"
#include "xlator.h"
struct saved_frames *
saved_frames_new (void)
{
struct saved_frames *saved_frames = NULL;
saved_frames = CALLOC (sizeof (*saved_frames), 1);
if (!saved_frames) {
return NULL;
}
INIT_LIST_HEAD (&saved_frames->fops.list);
INIT_LIST_HEAD (&saved_frames->mops.list);
INIT_LIST_HEAD (&saved_frames->cbks.list);
return saved_frames;
}
struct saved_frame *
get_head_frame_for_type (struct saved_frames *frames, int8_t type)
{
struct saved_frame *head_frame = NULL;
switch (type) {
case GF_OP_TYPE_FOP_REQUEST:
case GF_OP_TYPE_FOP_REPLY:
head_frame = &frames->fops;
break;
case GF_OP_TYPE_MOP_REQUEST:
case GF_OP_TYPE_MOP_REPLY:
head_frame = &frames->mops;
break;
case GF_OP_TYPE_CBK_REQUEST:
case GF_OP_TYPE_CBK_REPLY:
head_frame = &frames->cbks;
break;
}
return head_frame;
}
int
saved_frames_put (struct saved_frames *frames, call_frame_t *frame,
int32_t op, int8_t type, int64_t callid)
{
struct saved_frame *saved_frame = NULL;
struct saved_frame *head_frame = NULL;
head_frame = get_head_frame_for_type (frames, type);
saved_frame = CALLOC (sizeof (*saved_frame), 1);
if (!saved_frame) {
return -ENOMEM;
}
INIT_LIST_HEAD (&saved_frame->list);
saved_frame->frame = frame;
saved_frame->op = op;
saved_frame->type = type;
saved_frame->callid = callid;
gettimeofday (&saved_frame->saved_at, NULL);
list_add_tail (&saved_frame->list, &head_frame->list);
frames->count++;
return 0;
}
call_frame_t *
saved_frames_get (struct saved_frames *frames, int32_t op,
int8_t type, int64_t callid)
{
struct saved_frame *saved_frame = NULL;
struct saved_frame *tmp = NULL;
struct saved_frame *head_frame = NULL;
call_frame_t *frame = NULL;
head_frame = get_head_frame_for_type (frames, type);
list_for_each_entry (tmp, &head_frame->list, list) {
if (tmp->callid == callid) {
list_del_init (&tmp->list);
frames->count--;
saved_frame = tmp;
break;
}
}
if (saved_frame)
frame = saved_frame->frame;
FREE (saved_frame);
return frame;
}
struct saved_frame *
saved_frames_get_timedout (struct saved_frames *frames, int8_t type,
uint32_t timeout, struct timeval *current)
{
struct saved_frame *bailout_frame = NULL, *tmp = NULL;
struct saved_frame *head_frame = NULL;
head_frame = get_head_frame_for_type (frames, type);
if (!list_empty(&head_frame->list)) {
tmp = list_entry (head_frame->list.next, typeof (*tmp), list);
if ((tmp->saved_at.tv_sec + timeout) < current->tv_sec) {
bailout_frame = tmp;
list_del_init (&bailout_frame->list);
frames->count--;
}
}
return bailout_frame;
}
void
saved_frames_unwind (xlator_t *this, struct saved_frames *saved_frames,
struct saved_frame *head,
gf_op_t gf_ops[], char *gf_op_list[])
{
struct saved_frame *trav = NULL;
struct saved_frame *tmp = NULL;
gf_hdr_common_t hdr = {0, };
call_frame_t *frame = NULL;
dict_t *reply = NULL;
reply = get_new_dict();
dict_ref (reply);
hdr.rsp.op_ret = hton32 (-1);
hdr.rsp.op_errno = hton32 (ENOTCONN);
list_for_each_entry_safe (trav, tmp, &head->list, list) {
gf_log (this->name, GF_LOG_ERROR,
"forced unwinding frame type(%d) op(%s)",
trav->type, gf_op_list[trav->op]);
hdr.type = hton32 (trav->type);
hdr.op = hton32 (trav->op);
frame = trav->frame;
frame->root->rsp_refs = reply;
saved_frames->count--;
gf_ops[trav->op] (frame, &hdr, sizeof (hdr), NULL, 0);
list_del_init (&trav->list);
FREE (trav);
}
dict_unref (reply);
}
void
saved_frames_destroy (xlator_t *this, struct saved_frames *frames,
gf_op_t gf_fops[], gf_op_t gf_mops[], gf_op_t gf_cbks[])
{
saved_frames_unwind (this, frames, &frames->fops, gf_fops, gf_fop_list);
saved_frames_unwind (this, frames, &frames->mops, gf_mops, gf_mop_list);
saved_frames_unwind (this, frames, &frames->cbks, gf_cbks, gf_cbk_list);
FREE (frames);
}
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