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https://github.com/edk2-porting/linux-next.git
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38aa8b0c59
A reply to a recovery message will often be received after the relevant recovery sequence has aborted and the next recovery sequence has begun. We need to ignore replies to these old messages from the previous recovery. There's already a way to do this for synchronous recovery requests using the rc_id number, but not for async. Each recovery sequence already has a locally unique sequence number associated with it. This patch adds a field to the rcom (recovery message) structure where this recovery sequence number can be placed, rc_seq. When a node sends a reply to a recovery request, it copies the rc_seq number it received into rc_seq_reply. When the first node receives the reply to its recovery message, it will check whether rc_seq_reply matches the current recovery sequence number, ls_recover_seq, and if not then it ignores the old reply. An old, inadequate approach to filtering out old replies (checking if the current stage of recovery has moved back to the start) has been removed from two spots. The protocol version number is changed to reflect the different rcom structures. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
166 lines
5.3 KiB
C
166 lines
5.3 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include "dlm_internal.h"
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#include "rcom.h"
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#include "util.h"
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static void header_out(struct dlm_header *hd)
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{
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hd->h_version = cpu_to_le32(hd->h_version);
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hd->h_lockspace = cpu_to_le32(hd->h_lockspace);
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hd->h_nodeid = cpu_to_le32(hd->h_nodeid);
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hd->h_length = cpu_to_le16(hd->h_length);
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}
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static void header_in(struct dlm_header *hd)
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{
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hd->h_version = le32_to_cpu(hd->h_version);
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hd->h_lockspace = le32_to_cpu(hd->h_lockspace);
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hd->h_nodeid = le32_to_cpu(hd->h_nodeid);
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hd->h_length = le16_to_cpu(hd->h_length);
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}
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void dlm_message_out(struct dlm_message *ms)
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{
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struct dlm_header *hd = (struct dlm_header *) ms;
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header_out(hd);
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ms->m_type = cpu_to_le32(ms->m_type);
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ms->m_nodeid = cpu_to_le32(ms->m_nodeid);
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ms->m_pid = cpu_to_le32(ms->m_pid);
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ms->m_lkid = cpu_to_le32(ms->m_lkid);
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ms->m_remid = cpu_to_le32(ms->m_remid);
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ms->m_parent_lkid = cpu_to_le32(ms->m_parent_lkid);
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ms->m_parent_remid = cpu_to_le32(ms->m_parent_remid);
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ms->m_exflags = cpu_to_le32(ms->m_exflags);
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ms->m_sbflags = cpu_to_le32(ms->m_sbflags);
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ms->m_flags = cpu_to_le32(ms->m_flags);
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ms->m_lvbseq = cpu_to_le32(ms->m_lvbseq);
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ms->m_hash = cpu_to_le32(ms->m_hash);
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ms->m_status = cpu_to_le32(ms->m_status);
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ms->m_grmode = cpu_to_le32(ms->m_grmode);
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ms->m_rqmode = cpu_to_le32(ms->m_rqmode);
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ms->m_bastmode = cpu_to_le32(ms->m_bastmode);
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ms->m_asts = cpu_to_le32(ms->m_asts);
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ms->m_result = cpu_to_le32(ms->m_result);
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}
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void dlm_message_in(struct dlm_message *ms)
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{
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struct dlm_header *hd = (struct dlm_header *) ms;
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header_in(hd);
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ms->m_type = le32_to_cpu(ms->m_type);
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ms->m_nodeid = le32_to_cpu(ms->m_nodeid);
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ms->m_pid = le32_to_cpu(ms->m_pid);
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ms->m_lkid = le32_to_cpu(ms->m_lkid);
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ms->m_remid = le32_to_cpu(ms->m_remid);
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ms->m_parent_lkid = le32_to_cpu(ms->m_parent_lkid);
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ms->m_parent_remid = le32_to_cpu(ms->m_parent_remid);
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ms->m_exflags = le32_to_cpu(ms->m_exflags);
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ms->m_sbflags = le32_to_cpu(ms->m_sbflags);
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ms->m_flags = le32_to_cpu(ms->m_flags);
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ms->m_lvbseq = le32_to_cpu(ms->m_lvbseq);
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ms->m_hash = le32_to_cpu(ms->m_hash);
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ms->m_status = le32_to_cpu(ms->m_status);
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ms->m_grmode = le32_to_cpu(ms->m_grmode);
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ms->m_rqmode = le32_to_cpu(ms->m_rqmode);
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ms->m_bastmode = le32_to_cpu(ms->m_bastmode);
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ms->m_asts = le32_to_cpu(ms->m_asts);
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ms->m_result = le32_to_cpu(ms->m_result);
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}
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static void rcom_lock_out(struct rcom_lock *rl)
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{
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rl->rl_ownpid = cpu_to_le32(rl->rl_ownpid);
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rl->rl_lkid = cpu_to_le32(rl->rl_lkid);
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rl->rl_remid = cpu_to_le32(rl->rl_remid);
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rl->rl_parent_lkid = cpu_to_le32(rl->rl_parent_lkid);
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rl->rl_parent_remid = cpu_to_le32(rl->rl_parent_remid);
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rl->rl_exflags = cpu_to_le32(rl->rl_exflags);
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rl->rl_flags = cpu_to_le32(rl->rl_flags);
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rl->rl_lvbseq = cpu_to_le32(rl->rl_lvbseq);
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rl->rl_result = cpu_to_le32(rl->rl_result);
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rl->rl_wait_type = cpu_to_le16(rl->rl_wait_type);
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rl->rl_namelen = cpu_to_le16(rl->rl_namelen);
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}
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static void rcom_lock_in(struct rcom_lock *rl)
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{
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rl->rl_ownpid = le32_to_cpu(rl->rl_ownpid);
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rl->rl_lkid = le32_to_cpu(rl->rl_lkid);
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rl->rl_remid = le32_to_cpu(rl->rl_remid);
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rl->rl_parent_lkid = le32_to_cpu(rl->rl_parent_lkid);
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rl->rl_parent_remid = le32_to_cpu(rl->rl_parent_remid);
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rl->rl_exflags = le32_to_cpu(rl->rl_exflags);
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rl->rl_flags = le32_to_cpu(rl->rl_flags);
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rl->rl_lvbseq = le32_to_cpu(rl->rl_lvbseq);
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rl->rl_result = le32_to_cpu(rl->rl_result);
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rl->rl_wait_type = le16_to_cpu(rl->rl_wait_type);
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rl->rl_namelen = le16_to_cpu(rl->rl_namelen);
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}
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static void rcom_config_out(struct rcom_config *rf)
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{
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rf->rf_lvblen = cpu_to_le32(rf->rf_lvblen);
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rf->rf_lsflags = cpu_to_le32(rf->rf_lsflags);
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}
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static void rcom_config_in(struct rcom_config *rf)
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{
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rf->rf_lvblen = le32_to_cpu(rf->rf_lvblen);
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rf->rf_lsflags = le32_to_cpu(rf->rf_lsflags);
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}
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void dlm_rcom_out(struct dlm_rcom *rc)
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{
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struct dlm_header *hd = (struct dlm_header *) rc;
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int type = rc->rc_type;
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header_out(hd);
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rc->rc_type = cpu_to_le32(rc->rc_type);
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rc->rc_result = cpu_to_le32(rc->rc_result);
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rc->rc_id = cpu_to_le64(rc->rc_id);
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rc->rc_seq = cpu_to_le64(rc->rc_seq);
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rc->rc_seq_reply = cpu_to_le64(rc->rc_seq_reply);
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if (type == DLM_RCOM_LOCK)
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rcom_lock_out((struct rcom_lock *) rc->rc_buf);
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else if (type == DLM_RCOM_STATUS_REPLY)
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rcom_config_out((struct rcom_config *) rc->rc_buf);
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}
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void dlm_rcom_in(struct dlm_rcom *rc)
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{
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struct dlm_header *hd = (struct dlm_header *) rc;
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header_in(hd);
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rc->rc_type = le32_to_cpu(rc->rc_type);
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rc->rc_result = le32_to_cpu(rc->rc_result);
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rc->rc_id = le64_to_cpu(rc->rc_id);
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rc->rc_seq = le64_to_cpu(rc->rc_seq);
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rc->rc_seq_reply = le64_to_cpu(rc->rc_seq_reply);
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if (rc->rc_type == DLM_RCOM_LOCK)
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rcom_lock_in((struct rcom_lock *) rc->rc_buf);
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else if (rc->rc_type == DLM_RCOM_STATUS_REPLY)
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rcom_config_in((struct rcom_config *) rc->rc_buf);
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}
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