renamed xlator/protocol to xlator/protocol/legacy

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Raghavendra G <raghavendra@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 875 (Implement a new protocol to provide proper backward/forward compatibility)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=875

1 files changed, 194 insertions, 0 deletions

diff --git a/xlators/protocol/legacy/client/src/saved-frames.c b/xlators/protocol/legacy/client/src/saved-frames.c
new file mode 100644
index 00000000000..770de19ad72
--- /dev/null
+++ b/xlators/protocol/legacy/client/src/saved-frames.c
@@ -0,0 +1,194 @@
+/*
+  Copyright (c) 2008-2009 Gluster, Inc. <http://www.gluster.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"
+#include "client-mem-types.h"
+
+
+
+struct saved_frames *
+saved_frames_new (void)
+{
+	struct saved_frames *saved_frames = NULL;
+
+	saved_frames = GF_CALLOC (sizeof (*saved_frames), 1,
+                                  gf_client_mt_saved_frames);
+	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 = GF_CALLOC (sizeof (*saved_frame), 1,
+                                gf_client_mt_saved_frame);
+	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;
+
+	GF_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;
+
+	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;
+
+		saved_frames->count--;
+
+		gf_ops[trav->op] (frame, &hdr, sizeof (hdr), NULL);
+
+		list_del_init (&trav->list);
+		GF_FREE (trav);
+	}
+}
+
+
+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);
+
+	GF_FREE (frames);
+}