[DLM] The core of the DLM for GFS2/CLVM
This is the core of the distributed lock manager which is required
to use GFS2 as a cluster filesystem. It is also used by CLVM and
can be used as a standalone lock manager independantly of either
of these two projects.
It implements VAX-style locking modes.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steve Whitehouse <swhiteho@redhat.com>
diff --git a/fs/dlm/util.c b/fs/dlm/util.c
new file mode 100644
index 0000000..826d122
--- /dev/null
+++ b/fs/dlm/util.c
@@ -0,0 +1,173 @@
+/******************************************************************************
+*******************************************************************************
+**
+** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
+**
+** This copyrighted material is made available to anyone wishing to use,
+** modify, copy, or redistribute it subject to the terms and conditions
+** of the GNU General Public License v.2.
+**
+*******************************************************************************
+******************************************************************************/
+
+#include "dlm_internal.h"
+#include "rcom.h"
+#include "util.h"
+
+static void header_out(struct dlm_header *hd)
+{
+ hd->h_version = cpu_to_le32(hd->h_version);
+ hd->h_lockspace = cpu_to_le32(hd->h_lockspace);
+ hd->h_nodeid = cpu_to_le32(hd->h_nodeid);
+ hd->h_length = cpu_to_le16(hd->h_length);
+}
+
+static void header_in(struct dlm_header *hd)
+{
+ hd->h_version = le32_to_cpu(hd->h_version);
+ hd->h_lockspace = le32_to_cpu(hd->h_lockspace);
+ hd->h_nodeid = le32_to_cpu(hd->h_nodeid);
+ hd->h_length = le16_to_cpu(hd->h_length);
+}
+
+void dlm_message_out(struct dlm_message *ms)
+{
+ struct dlm_header *hd = (struct dlm_header *) ms;
+
+ header_out(hd);
+
+ ms->m_type = cpu_to_le32(ms->m_type);
+ ms->m_nodeid = cpu_to_le32(ms->m_nodeid);
+ ms->m_pid = cpu_to_le32(ms->m_pid);
+ ms->m_lkid = cpu_to_le32(ms->m_lkid);
+ ms->m_remid = cpu_to_le32(ms->m_remid);
+ ms->m_parent_lkid = cpu_to_le32(ms->m_parent_lkid);
+ ms->m_parent_remid = cpu_to_le32(ms->m_parent_remid);
+ ms->m_exflags = cpu_to_le32(ms->m_exflags);
+ ms->m_sbflags = cpu_to_le32(ms->m_sbflags);
+ ms->m_flags = cpu_to_le32(ms->m_flags);
+ ms->m_lvbseq = cpu_to_le32(ms->m_lvbseq);
+ ms->m_hash = cpu_to_le32(ms->m_hash);
+ ms->m_status = cpu_to_le32(ms->m_status);
+ ms->m_grmode = cpu_to_le32(ms->m_grmode);
+ ms->m_rqmode = cpu_to_le32(ms->m_rqmode);
+ ms->m_bastmode = cpu_to_le32(ms->m_bastmode);
+ ms->m_asts = cpu_to_le32(ms->m_asts);
+ ms->m_result = cpu_to_le32(ms->m_result);
+ ms->m_range[0] = cpu_to_le64(ms->m_range[0]);
+ ms->m_range[1] = cpu_to_le64(ms->m_range[1]);
+}
+
+void dlm_message_in(struct dlm_message *ms)
+{
+ struct dlm_header *hd = (struct dlm_header *) ms;
+
+ header_in(hd);
+
+ ms->m_type = le32_to_cpu(ms->m_type);
+ ms->m_nodeid = le32_to_cpu(ms->m_nodeid);
+ ms->m_pid = le32_to_cpu(ms->m_pid);
+ ms->m_lkid = le32_to_cpu(ms->m_lkid);
+ ms->m_remid = le32_to_cpu(ms->m_remid);
+ ms->m_parent_lkid = le32_to_cpu(ms->m_parent_lkid);
+ ms->m_parent_remid = le32_to_cpu(ms->m_parent_remid);
+ ms->m_exflags = le32_to_cpu(ms->m_exflags);
+ ms->m_sbflags = le32_to_cpu(ms->m_sbflags);
+ ms->m_flags = le32_to_cpu(ms->m_flags);
+ ms->m_lvbseq = le32_to_cpu(ms->m_lvbseq);
+ ms->m_hash = le32_to_cpu(ms->m_hash);
+ ms->m_status = le32_to_cpu(ms->m_status);
+ ms->m_grmode = le32_to_cpu(ms->m_grmode);
+ ms->m_rqmode = le32_to_cpu(ms->m_rqmode);
+ ms->m_bastmode = le32_to_cpu(ms->m_bastmode);
+ ms->m_asts = le32_to_cpu(ms->m_asts);
+ ms->m_result = le32_to_cpu(ms->m_result);
+ ms->m_range[0] = le64_to_cpu(ms->m_range[0]);
+ ms->m_range[1] = le64_to_cpu(ms->m_range[1]);
+}
+
+static void rcom_lock_out(struct rcom_lock *rl)
+{
+ rl->rl_ownpid = cpu_to_le32(rl->rl_ownpid);
+ rl->rl_lkid = cpu_to_le32(rl->rl_lkid);
+ rl->rl_remid = cpu_to_le32(rl->rl_remid);
+ rl->rl_parent_lkid = cpu_to_le32(rl->rl_parent_lkid);
+ rl->rl_parent_remid = cpu_to_le32(rl->rl_parent_remid);
+ rl->rl_exflags = cpu_to_le32(rl->rl_exflags);
+ rl->rl_flags = cpu_to_le32(rl->rl_flags);
+ rl->rl_lvbseq = cpu_to_le32(rl->rl_lvbseq);
+ rl->rl_result = cpu_to_le32(rl->rl_result);
+ rl->rl_wait_type = cpu_to_le16(rl->rl_wait_type);
+ rl->rl_namelen = cpu_to_le16(rl->rl_namelen);
+ rl->rl_range[0] = cpu_to_le64(rl->rl_range[0]);
+ rl->rl_range[1] = cpu_to_le64(rl->rl_range[1]);
+ rl->rl_range[2] = cpu_to_le64(rl->rl_range[2]);
+ rl->rl_range[3] = cpu_to_le64(rl->rl_range[3]);
+}
+
+static void rcom_lock_in(struct rcom_lock *rl)
+{
+ rl->rl_ownpid = le32_to_cpu(rl->rl_ownpid);
+ rl->rl_lkid = le32_to_cpu(rl->rl_lkid);
+ rl->rl_remid = le32_to_cpu(rl->rl_remid);
+ rl->rl_parent_lkid = le32_to_cpu(rl->rl_parent_lkid);
+ rl->rl_parent_remid = le32_to_cpu(rl->rl_parent_remid);
+ rl->rl_exflags = le32_to_cpu(rl->rl_exflags);
+ rl->rl_flags = le32_to_cpu(rl->rl_flags);
+ rl->rl_lvbseq = le32_to_cpu(rl->rl_lvbseq);
+ rl->rl_result = le32_to_cpu(rl->rl_result);
+ rl->rl_wait_type = le16_to_cpu(rl->rl_wait_type);
+ rl->rl_namelen = le16_to_cpu(rl->rl_namelen);
+ rl->rl_range[0] = le64_to_cpu(rl->rl_range[0]);
+ rl->rl_range[1] = le64_to_cpu(rl->rl_range[1]);
+ rl->rl_range[2] = le64_to_cpu(rl->rl_range[2]);
+ rl->rl_range[3] = le64_to_cpu(rl->rl_range[3]);
+}
+
+static void rcom_config_out(struct rcom_config *rf)
+{
+ rf->rf_lvblen = cpu_to_le32(rf->rf_lvblen);
+ rf->rf_lsflags = cpu_to_le32(rf->rf_lsflags);
+}
+
+static void rcom_config_in(struct rcom_config *rf)
+{
+ rf->rf_lvblen = le32_to_cpu(rf->rf_lvblen);
+ rf->rf_lsflags = le32_to_cpu(rf->rf_lsflags);
+}
+
+void dlm_rcom_out(struct dlm_rcom *rc)
+{
+ struct dlm_header *hd = (struct dlm_header *) rc;
+ int type = rc->rc_type;
+
+ header_out(hd);
+
+ rc->rc_type = cpu_to_le32(rc->rc_type);
+ rc->rc_result = cpu_to_le32(rc->rc_result);
+ rc->rc_id = cpu_to_le64(rc->rc_id);
+
+ if (type == DLM_RCOM_LOCK)
+ rcom_lock_out((struct rcom_lock *) rc->rc_buf);
+
+ else if (type == DLM_RCOM_STATUS_REPLY)
+ rcom_config_out((struct rcom_config *) rc->rc_buf);
+}
+
+void dlm_rcom_in(struct dlm_rcom *rc)
+{
+ struct dlm_header *hd = (struct dlm_header *) rc;
+
+ header_in(hd);
+
+ rc->rc_type = le32_to_cpu(rc->rc_type);
+ rc->rc_result = le32_to_cpu(rc->rc_result);
+ rc->rc_id = le64_to_cpu(rc->rc_id);
+
+ if (rc->rc_type == DLM_RCOM_LOCK)
+ rcom_lock_in((struct rcom_lock *) rc->rc_buf);
+
+ else if (rc->rc_type == DLM_RCOM_STATUS_REPLY)
+ rcom_config_in((struct rcom_config *) rc->rc_buf);
+}
+