[Ocfs2-devel] [PATCH 4/5] ocfs2_connection_private for holding DLM this_node information
Goldwyn Rodrigues
rgoldwyn at suse.de
Wed Aug 21 06:10:30 PDT 2013
ocfs2_connection_private holds this nodes information, such as the DLM
allocated slot number and the node number assigned to the node.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn at suse.com>
---
fs/ocfs2/dlmglue.c | 2 +-
fs/ocfs2/stack_o2cb.c | 3 ++-
fs/ocfs2/stack_user.c | 51 +++++++++++++++++++++++++++++++++++++++++++++------
fs/ocfs2/stackglue.c | 4 ++--
fs/ocfs2/stackglue.h | 4 ++--
5 files changed, 52 insertions(+), 12 deletions(-)
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 7c57de3..f2d48c8 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -3007,7 +3007,7 @@ int ocfs2_dlm_init(struct ocfs2_super *osb)
goto bail;
}
- status = ocfs2_cluster_this_node(&osb->node_num);
+ status = ocfs2_cluster_this_node(conn, &osb->node_num);
if (status < 0) {
mlog_errno(status);
mlog(ML_ERROR,
diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c
index bf1f893..1724d43 100644
--- a/fs/ocfs2/stack_o2cb.c
+++ b/fs/ocfs2/stack_o2cb.c
@@ -398,7 +398,8 @@ static int o2cb_cluster_disconnect(struct ocfs2_cluster_connection *conn)
return 0;
}
-static int o2cb_cluster_this_node(unsigned int *node)
+static int o2cb_cluster_this_node(struct ocfs2_cluster_connection *conn,
+ unsigned int *node)
{
int node_num;
diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c
index d604a36..b869d4d6 100644
--- a/fs/ocfs2/stack_user.c
+++ b/fs/ocfs2/stack_user.c
@@ -23,6 +23,7 @@
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/reboot.h>
+#include <linux/sched.h>
#include <asm/uaccess.h>
#include "stackglue.h"
@@ -112,6 +113,12 @@ struct ocfs2_live_connection {
struct ocfs2_cluster_connection *oc_conn;
};
+struct ocfs2_connection_private {
+ atomic_t cp_this_node;
+ int cp_our_slot;
+ wait_queue_head_t cp_wait;
+};
+
struct ocfs2_control_private {
struct list_head op_list;
int op_state;
@@ -805,12 +812,30 @@ static void user_recover_prep(void *arg)
static void user_recover_slot(void *arg, struct dlm_slot *slot)
{
+ struct ocfs2_cluster_connection *conn =
+ (struct ocfs2_cluster_connection *) arg;
+ printk(KERN_INFO "ocfs2: Node %d/%d down. Initiating recovery.\n",
+ slot->nodeid, slot->slot);
+ conn->cc_recovery_handler(slot->nodeid, conn->cc_recovery_data);
}
static void user_recover_done(void *arg, struct dlm_slot *slots,
int num_slots, int our_slot,
uint32_t generation)
{
+ struct ocfs2_cluster_connection *conn =
+ (struct ocfs2_cluster_connection *)arg;
+ struct ocfs2_connection_private *priv = conn->cc_private;
+ int i;
+
+ for (i = 0; i < num_slots; i++)
+ if (slots[i].slot == our_slot) {
+ atomic_set(&priv->cp_this_node, slots[i].nodeid);
+ break;
+ }
+
+ priv->cp_our_slot = our_slot;
+ wake_up(&priv->cp_wait);
}
const struct dlm_lockspace_ops ocfs2_ls_ops = {
@@ -823,9 +848,20 @@ static int user_cluster_connect(struct ocfs2_cluster_connection *conn)
{
dlm_lockspace_t *fsdlm;
int rc = 0, ops_rv;
+ struct ocfs2_connection_private *priv;
BUG_ON(conn == NULL);
+ priv = kzalloc(sizeof(struct ocfs2_connection_private), GFP_KERNEL);
+ if (!priv) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ init_waitqueue_head(&priv->cp_wait);
+ atomic_set(&priv->cp_this_node, 0);
+
+ conn->cc_private = priv;
+
rc = dlm_new_lockspace(conn->cc_name, conn->cc_cluster_name,
DLM_LSFL_FS, DLM_LVB_LEN,
&ocfs2_ls_ops, conn, &ops_rv, &fsdlm);
@@ -839,6 +875,7 @@ static int user_cluster_connect(struct ocfs2_cluster_connection *conn)
goto out;
}
+ wait_event(priv->cp_wait, (atomic_read(&priv->cp_this_node) > 0));
conn->cc_lockspace = fsdlm;
out:
return rc;
@@ -848,19 +885,21 @@ static int user_cluster_disconnect(struct ocfs2_cluster_connection *conn)
{
dlm_release_lockspace(conn->cc_lockspace, 2);
conn->cc_lockspace = NULL;
+ kfree(conn->cc_private);
conn->cc_private = NULL;
return 0;
}
-static int user_cluster_this_node(unsigned int *this_node)
+static int user_cluster_this_node(struct ocfs2_cluster_connection *conn,
+ unsigned int *this_node)
{
- int rc;
+ struct ocfs2_connection_private *priv =
+ (struct ocfs2_connection_private *)conn->cc_private;
- rc = ocfs2_control_get_this_node();
- if (rc < 0)
- return rc;
+ if (!priv)
+ return -EINVAL;
+ *this_node = atomic_read(&priv->cp_this_node);
- *this_node = rc;
return 0;
}
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index 9acee13..4dd732b 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -465,9 +465,9 @@ void ocfs2_cluster_hangup(const char *group, int grouplen)
}
EXPORT_SYMBOL_GPL(ocfs2_cluster_hangup);
-int ocfs2_cluster_this_node(unsigned int *node)
+int ocfs2_cluster_this_node(struct ocfs2_cluster_connection *conn, unsigned int *node)
{
- return active_stack->sp_ops->this_node(node);
+ return active_stack->sp_ops->this_node(conn, node);
}
EXPORT_SYMBOL_GPL(ocfs2_cluster_this_node);
diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index b46fd51..c953290 100644
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -157,7 +157,7 @@ struct ocfs2_stack_operations {
* ->this_node() returns the cluster's unique identifier for the
* local node.
*/
- int (*this_node)(unsigned int *node);
+ int (*this_node)(struct ocfs2_cluster_connection *conn, unsigned int *node);
/*
* Call the underlying dlm lock function. The ->dlm_lock()
@@ -267,7 +267,7 @@ int ocfs2_cluster_connect_agnostic(const char *group,
int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn,
int hangup_pending);
void ocfs2_cluster_hangup(const char *group, int grouplen);
-int ocfs2_cluster_this_node(unsigned int *node);
+int ocfs2_cluster_this_node(struct ocfs2_cluster_connection *, unsigned int *node);
struct ocfs2_lock_res;
int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
--
1.8.1.4
--
Goldwyn
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