[DLM] interface for purge (2/2) [18/34]

Steven Whitehouse
2007-05-01T10:17:30Z

>From 72c2be776bd6eec5186e316e6d9dd4aab78d314d Mon Sep 17 00:00:00 2001
From: David Teigland <teigland@redhat.com>
Date: Fri, 30 Mar 2007 15:06:16 -0500
Subject: [PATCH] [DLM] interface for purge (2/2)

Add code to accept purge commands from userland.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/dlm/lock.h b/fs/dlm/lock.h
index 0843a30..64fc4ec 100644
--- a/fs/dlm/lock.h
+++ b/fs/dlm/lock.h
@@ -41,6 +41,8 @@ int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
uint32_t flags, uint32_t lkid, char *lvb_in);
int dlm_user_cancel(struct dlm_ls *ls, struct dlm_user_args *ua_tmp,
uint32_t flags, uint32_t lkid);
+int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
+ int nodeid, int pid);
void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc);

static inline int is_master(struct dlm_rsb *r)
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index c978c67..3e746a6 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -56,6 +56,7 @@ struct dlm_write_request32 {
union {
struct dlm_lock_params32 lock;
struct dlm_lspace_params lspace;
+ struct dlm_purge_params purge;
} i;
};

@@ -92,6 +93,9 @@ static void compat_input(struct dlm_write_request *kb,
kb->i.lspace.flags = kb32->i.lspace.flags;
kb->i.lspace.minor = kb32->i.lspace.minor;
strcpy(kb->i.lspace.name, kb32->i.lspace.name);
+ } else if (kb->cmd == DLM_USER_PURGE) {
+ kb->i.purge.nodeid = kb32->i.purge.nodeid;
+ kb->i.purge.pid = kb32->i.purge.pid;
} else {
kb->i.lock.mode = kb32->i.lock.mode;
kb->i.lock.namelen = kb32->i.lock.namelen;
@@ -320,6 +324,22 @@ fail:
return error;
}

+static int device_user_purge(struct dlm_user_proc *proc,
+ struct dlm_purge_params *params)
+{
+ struct dlm_ls *ls;
+ int error;
+
+ ls = dlm_find_lockspace_local(proc->lockspace);
+ if (!ls)
+ return -ENOENT;
+
+ error = dlm_user_purge(ls, proc, params->nodeid, params->pid);
+
+ dlm_put_lockspace(ls);
+ return error;
+}
+
static int device_create_lockspace(struct dlm_lspace_params *params)
{
dlm_lockspace_t *lockspace;
@@ -522,6 +542,14 @@ static ssize_t device_write(struct file *file, const char __user *buf,
error = device_remove_lockspace(&kbuf->i.lspace);
break;

+ case DLM_USER_PURGE:
+ if (!proc) {
+ log_print("no locking on control device");
+ goto out_sig;
+ }
+ error = device_user_purge(proc, &kbuf->i.purge);
+ break;
+
default:
log_print("Unknown command passed to DLM device : %d\n",
kbuf->cmd);
diff --git a/include/linux/dlm_device.h b/include/linux/dlm_device.h
index 2a2dd18..c2735ca 100644
--- a/include/linux/dlm_device.h
+++ b/include/linux/dlm_device.h
@@ -19,7 +19,7 @@

/* Version of the device interface */
#define DLM_DEVICE_VERSION_MAJOR 5
-#define DLM_DEVICE_VERSION_MINOR 0
+#define DLM_DEVICE_VERSION_MINOR 1
#define DLM_DEVICE_VERSION_PATCH 0

/* struct passed to the lock write */
@@ -44,6 +44,11 @@ struct dlm_lspace_params {
char name[0];
};

+struct dlm_purge_params {
+ __u32 nodeid;
+ __u32 pid;
+};
+
struct dlm_write_request {
__u32 version[3];
__u8 cmd;
@@ -53,6 +58,7 @@ struct dlm_write_request {
union {
struct dlm_lock_params lock;
struct dlm_lspace_params lspace;
+ struct dlm_purge_params purge;
} i;
};

@@ -76,6 +82,7 @@ struct dlm_lock_result {
#define DLM_USER_QUERY 3
#define DLM_USER_CREATE_LOCKSPACE 4
#define DLM_USER_REMOVE_LOCKSPACE 5
+#define DLM_USER_PURGE 6

/* Arbitrary length restriction */
#define MAX_LS_NAME_LEN 64
--
1.5.1.2