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-rw-r--r--fs/dlm/lockspace.c24
-rw-r--r--fs/dlm/lockspace.h1
-rw-r--r--fs/dlm/user.c61
-rw-r--r--fs/dlm/user.h1
4 files changed, 85 insertions, 2 deletions
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index 56eae4e4a95..ba672fe0a60 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -378,6 +378,11 @@ static int new_lockspace(char *name, int namelen, void **lockspace,
if (!try_module_get(THIS_MODULE))
return -EINVAL;
+ if (!dlm_user_daemon_available()) {
+ module_put(THIS_MODULE);
+ return -EUNATCH;
+ }
+
error = 0;
spin_lock(&lslist_lock);
@@ -669,7 +674,7 @@ static int release_lockspace(struct dlm_ls *ls, int force)
dlm_device_deregister(ls);
- if (force < 3)
+ if (force < 3 && dlm_user_daemon_available())
do_uevent(ls, 0);
dlm_recoverd_stop(ls);
@@ -791,3 +796,20 @@ int dlm_release_lockspace(void *lockspace, int force)
return error;
}
+void dlm_stop_lockspaces(void)
+{
+ struct dlm_ls *ls;
+
+ restart:
+ spin_lock(&lslist_lock);
+ list_for_each_entry(ls, &lslist, ls_list) {
+ if (!test_bit(LSFL_RUNNING, &ls->ls_flags))
+ continue;
+ spin_unlock(&lslist_lock);
+ log_error(ls, "no userland control daemon, stopping lockspace");
+ dlm_ls_stop(ls);
+ goto restart;
+ }
+ spin_unlock(&lslist_lock);
+}
+
diff --git a/fs/dlm/lockspace.h b/fs/dlm/lockspace.h
index 891eabbdd02..f879f87901f 100644
--- a/fs/dlm/lockspace.h
+++ b/fs/dlm/lockspace.h
@@ -20,6 +20,7 @@ struct dlm_ls *dlm_find_lockspace_global(uint32_t id);
struct dlm_ls *dlm_find_lockspace_local(void *id);
struct dlm_ls *dlm_find_lockspace_device(int minor);
void dlm_put_lockspace(struct dlm_ls *ls);
+void dlm_stop_lockspaces(void);
#endif /* __LOCKSPACE_DOT_H__ */
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index 6542110c0da..81627b502a5 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -27,6 +27,8 @@
static const char name_prefix[] = "dlm";
static const struct file_operations device_fops;
+static atomic_t dlm_monitor_opened;
+static int dlm_monitor_unused = 1;
#ifdef CONFIG_COMPAT
@@ -890,6 +892,26 @@ static unsigned int device_poll(struct file *file, poll_table *wait)
return 0;
}
+int dlm_user_daemon_available(void)
+{
+ /* dlm_controld hasn't started (or, has started, but not
+ properly populated configfs) */
+
+ if (!dlm_our_nodeid())
+ return 0;
+
+ /* This is to deal with versions of dlm_controld that don't
+ know about the monitor device. We assume that if the
+ dlm_controld was started (above), but the monitor device
+ was never opened, that it's an old version. dlm_controld
+ should open the monitor device before populating configfs. */
+
+ if (dlm_monitor_unused)
+ return 1;
+
+ return atomic_read(&dlm_monitor_opened) ? 1 : 0;
+}
+
static int ctl_device_open(struct inode *inode, struct file *file)
{
cycle_kernel_lock();
@@ -902,6 +924,20 @@ static int ctl_device_close(struct inode *inode, struct file *file)
return 0;
}
+static int monitor_device_open(struct inode *inode, struct file *file)
+{
+ atomic_inc(&dlm_monitor_opened);
+ dlm_monitor_unused = 0;
+ return 0;
+}
+
+static int monitor_device_close(struct inode *inode, struct file *file)
+{
+ if (atomic_dec_and_test(&dlm_monitor_opened))
+ dlm_stop_lockspaces();
+ return 0;
+}
+
static const struct file_operations device_fops = {
.open = device_open,
.release = device_close,
@@ -925,19 +961,42 @@ static struct miscdevice ctl_device = {
.minor = MISC_DYNAMIC_MINOR,
};
+static const struct file_operations monitor_device_fops = {
+ .open = monitor_device_open,
+ .release = monitor_device_close,
+ .owner = THIS_MODULE,
+};
+
+static struct miscdevice monitor_device = {
+ .name = "dlm-monitor",
+ .fops = &monitor_device_fops,
+ .minor = MISC_DYNAMIC_MINOR,
+};
+
int __init dlm_user_init(void)
{
int error;
+ atomic_set(&dlm_monitor_opened, 0);
+
error = misc_register(&ctl_device);
- if (error)
+ if (error) {
log_print("misc_register failed for control device");
+ goto out;
+ }
+ error = misc_register(&monitor_device);
+ if (error) {
+ log_print("misc_register failed for monitor device");
+ misc_deregister(&ctl_device);
+ }
+ out:
return error;
}
void dlm_user_exit(void)
{
misc_deregister(&ctl_device);
+ misc_deregister(&monitor_device);
}
diff --git a/fs/dlm/user.h b/fs/dlm/user.h
index c528b6b2991..35eb6a13d61 100644
--- a/fs/dlm/user.h
+++ b/fs/dlm/user.h
@@ -13,5 +13,6 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, int type);
int dlm_user_init(void);
void dlm_user_exit(void);
int dlm_device_deregister(struct dlm_ls *ls);
+int dlm_user_daemon_available(void);
#endif