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-rw-r--r--fs/dlm/config.c130
1 files changed, 73 insertions, 57 deletions
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 6cf72fcc0d0..e7e327d43fa 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -2,7 +2,7 @@
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
-** Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2004-2011 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
@@ -17,6 +17,7 @@
#include <linux/slab.h>
#include <linux/in.h>
#include <linux/in6.h>
+#include <linux/dlmconstants.h>
#include <net/ipv6.h>
#include <net/sock.h>
@@ -36,6 +37,7 @@
static struct config_group *space_list;
static struct config_group *comm_list;
static struct dlm_comm *local_comm;
+static uint32_t dlm_comm_count;
struct dlm_clusters;
struct dlm_cluster;
@@ -103,6 +105,8 @@ struct dlm_cluster {
unsigned int cl_timewarn_cs;
unsigned int cl_waitwarn_us;
unsigned int cl_new_rsb_count;
+ unsigned int cl_recover_callbacks;
+ char cl_cluster_name[DLM_LOCKSPACE_LEN];
};
enum {
@@ -118,6 +122,8 @@ enum {
CLUSTER_ATTR_TIMEWARN_CS,
CLUSTER_ATTR_WAITWARN_US,
CLUSTER_ATTR_NEW_RSB_COUNT,
+ CLUSTER_ATTR_RECOVER_CALLBACKS,
+ CLUSTER_ATTR_CLUSTER_NAME,
};
struct cluster_attribute {
@@ -126,6 +132,27 @@ struct cluster_attribute {
ssize_t (*store)(struct dlm_cluster *, const char *, size_t);
};
+static ssize_t cluster_cluster_name_read(struct dlm_cluster *cl, char *buf)
+{
+ return sprintf(buf, "%s\n", cl->cl_cluster_name);
+}
+
+static ssize_t cluster_cluster_name_write(struct dlm_cluster *cl,
+ const char *buf, size_t len)
+{
+ strncpy(dlm_config.ci_cluster_name, buf, DLM_LOCKSPACE_LEN);
+ strncpy(cl->cl_cluster_name, buf, DLM_LOCKSPACE_LEN);
+ return len;
+}
+
+static struct cluster_attribute cluster_attr_cluster_name = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "cluster_name",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = cluster_cluster_name_read,
+ .store = cluster_cluster_name_write,
+};
+
static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
int *info_field, int check_zero,
const char *buf, size_t len)
@@ -171,6 +198,7 @@ CLUSTER_ATTR(protocol, 0);
CLUSTER_ATTR(timewarn_cs, 1);
CLUSTER_ATTR(waitwarn_us, 0);
CLUSTER_ATTR(new_rsb_count, 0);
+CLUSTER_ATTR(recover_callbacks, 0);
static struct configfs_attribute *cluster_attrs[] = {
[CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr,
@@ -185,6 +213,8 @@ static struct configfs_attribute *cluster_attrs[] = {
[CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs.attr,
[CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us.attr,
[CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count.attr,
+ [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks.attr,
+ [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name.attr,
NULL,
};
@@ -293,6 +323,7 @@ struct dlm_comms {
struct dlm_comm {
struct config_item item;
+ int seq;
int nodeid;
int local;
int addr_count;
@@ -309,6 +340,7 @@ struct dlm_node {
int nodeid;
int weight;
int new;
+ int comm_seq; /* copy of cm->seq when nd->nodeid is set */
};
static struct configfs_group_operations clusters_ops = {
@@ -455,6 +487,9 @@ static struct config_group *make_cluster(struct config_group *g,
cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us;
cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
+ cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
+ memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
+ DLM_LOCKSPACE_LEN);
space_list = &sps->ss_group;
comm_list = &cms->cs_group;
@@ -558,6 +593,11 @@ static struct config_item *make_comm(struct config_group *g, const char *name)
return ERR_PTR(-ENOMEM);
config_item_init_type_name(&cm->item, name, &comm_type);
+
+ cm->seq = dlm_comm_count++;
+ if (!cm->seq)
+ cm->seq = dlm_comm_count++;
+
cm->nodeid = -1;
cm->local = 0;
cm->addr_count = 0;
@@ -801,7 +841,10 @@ static ssize_t node_nodeid_read(struct dlm_node *nd, char *buf)
static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
size_t len)
{
+ uint32_t seq = 0;
nd->nodeid = simple_strtol(buf, NULL, 0);
+ dlm_comm_seq(nd->nodeid, &seq);
+ nd->comm_seq = seq;
return len;
}
@@ -908,13 +951,13 @@ static void put_comm(struct dlm_comm *cm)
}
/* caller must free mem */
-int dlm_nodeid_list(char *lsname, int **ids_out, int *ids_count_out,
- int **new_out, int *new_count_out)
+int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
+ int *count_out)
{
struct dlm_space *sp;
struct dlm_node *nd;
- int i = 0, rv = 0, ids_count = 0, new_count = 0;
- int *ids, *new;
+ struct dlm_config_node *nodes, *node;
+ int rv, count;
sp = get_space(lsname);
if (!sp)
@@ -927,73 +970,42 @@ int dlm_nodeid_list(char *lsname, int **ids_out, int *ids_count_out,
goto out;
}
- ids_count = sp->members_count;
+ count = sp->members_count;
- ids = kcalloc(ids_count, sizeof(int), GFP_NOFS);
- if (!ids) {
+ nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
+ if (!nodes) {
rv = -ENOMEM;
goto out;
}
+ node = nodes;
list_for_each_entry(nd, &sp->members, list) {
- ids[i++] = nd->nodeid;
- if (nd->new)
- new_count++;
- }
-
- if (ids_count != i)
- printk(KERN_ERR "dlm: bad nodeid count %d %d\n", ids_count, i);
-
- if (!new_count)
- goto out_ids;
+ node->nodeid = nd->nodeid;
+ node->weight = nd->weight;
+ node->new = nd->new;
+ node->comm_seq = nd->comm_seq;
+ node++;
- new = kcalloc(new_count, sizeof(int), GFP_NOFS);
- if (!new) {
- kfree(ids);
- rv = -ENOMEM;
- goto out;
+ nd->new = 0;
}
- i = 0;
- list_for_each_entry(nd, &sp->members, list) {
- if (nd->new) {
- new[i++] = nd->nodeid;
- nd->new = 0;
- }
- }
- *new_count_out = new_count;
- *new_out = new;
-
- out_ids:
- *ids_count_out = ids_count;
- *ids_out = ids;
+ *count_out = count;
+ *nodes_out = nodes;
+ rv = 0;
out:
mutex_unlock(&sp->members_lock);
put_space(sp);
return rv;
}
-int dlm_node_weight(char *lsname, int nodeid)
+int dlm_comm_seq(int nodeid, uint32_t *seq)
{
- struct dlm_space *sp;
- struct dlm_node *nd;
- int w = -EEXIST;
-
- sp = get_space(lsname);
- if (!sp)
- goto out;
-
- mutex_lock(&sp->members_lock);
- list_for_each_entry(nd, &sp->members, list) {
- if (nd->nodeid != nodeid)
- continue;
- w = nd->weight;
- break;
- }
- mutex_unlock(&sp->members_lock);
- put_space(sp);
- out:
- return w;
+ struct dlm_comm *cm = get_comm(nodeid, NULL);
+ if (!cm)
+ return -EEXIST;
+ *seq = cm->seq;
+ put_comm(cm);
+ return 0;
}
int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr)
@@ -1047,6 +1059,8 @@ int dlm_our_addr(struct sockaddr_storage *addr, int num)
#define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */
#define DEFAULT_WAITWARN_US 0
#define DEFAULT_NEW_RSB_COUNT 128
+#define DEFAULT_RECOVER_CALLBACKS 0
+#define DEFAULT_CLUSTER_NAME ""
struct dlm_config_info dlm_config = {
.ci_tcp_port = DEFAULT_TCP_PORT,
@@ -1060,6 +1074,8 @@ struct dlm_config_info dlm_config = {
.ci_protocol = DEFAULT_PROTOCOL,
.ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
.ci_waitwarn_us = DEFAULT_WAITWARN_US,
- .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT
+ .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
+ .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
+ .ci_cluster_name = DEFAULT_CLUSTER_NAME
};