sched/headers: Prepare for new header dependencies before moving code to <linux/sched...

[mirror_ubuntu-bionic-kernel.git] / fs / ocfs2 / dlmglue.h

diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h
index d293a22c32c5447e3595f1a61deba545f74df7e5..a7fc18ba0dc19790903cd9e6ca40a9b04ee44b0c 100644 (file)
--- a/fs/ocfs2/dlmglue.h
+++ b/fs/ocfs2/dlmglue.h
@@ -70,6 +70,11 @@ struct ocfs2_orphan_scan_lvb {
        __be32  lvb_os_seqno;
 };
 
+struct ocfs2_lock_holder {
+       struct list_head oh_list;
+       struct pid *oh_owner_pid;
+};
+
 /* ocfs2_inode_lock_full() 'arg_flags' flags */
 /* don't wait on recovery. */
 #define OCFS2_META_LOCK_RECOVERY       (0x01)
@@ -77,6 +82,8 @@ struct ocfs2_orphan_scan_lvb {
 #define OCFS2_META_LOCK_NOQUEUE                (0x02)
 /* don't block waiting for the downconvert thread, instead return -EAGAIN */
 #define OCFS2_LOCK_NONBLOCK            (0x04)
+/* just get back disk inode bh if we've got cluster lock. */
+#define OCFS2_META_LOCK_GETBH          (0x08)
 
 /* Locking subclasses of inode cluster lock */
 enum {
@@ -170,4 +177,15 @@ void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
 
 /* To set the locking protocol on module initialization */
 void ocfs2_set_locking_protocol(void);
+
+/* The _tracker pair is used to avoid cluster recursive locking */
+int ocfs2_inode_lock_tracker(struct inode *inode,
+                            struct buffer_head **ret_bh,
+                            int ex,
+                            struct ocfs2_lock_holder *oh);
+void ocfs2_inode_unlock_tracker(struct inode *inode,
+                               int ex,
+                               struct ocfs2_lock_holder *oh,
+                               int had_lock);
+
 #endif /* DLMGLUE_H */