Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / ocfs2 / uptodate.h

diff --git a/kernel/fs/ocfs2/uptodate.h b/kernel/fs/ocfs2/uptodate.h
new file mode 100644 (file)
index 0000000..0d826fe
--- /dev/null
+++ b/kernel/fs/ocfs2/uptodate.h
@@ -0,0 +1,84 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * uptodate.h
+ *
+ * Cluster uptodate tracking
+ *
+ * Copyright (C) 2002, 2004, 2005 Oracle.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ */
+
+#ifndef OCFS2_UPTODATE_H
+#define OCFS2_UPTODATE_H
+
+/*
+ * The caching code relies on locking provided by the user of
+ * struct ocfs2_caching_info.  These operations connect that up.
+ */
+struct ocfs2_caching_operations {
+       /*
+        * A u64 representing the owning structure.  Usually this
+        * is the block number (i_blkno or whatnot).  This is used so
+        * that caching log messages can identify the owning structure.
+        */
+       u64     (*co_owner)(struct ocfs2_caching_info *ci);
+
+       /* The superblock is needed during I/O. */
+       struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci);
+       /*
+        * Lock and unlock the caching data.  These will not sleep, and
+        * should probably be spinlocks.
+        */
+       void    (*co_cache_lock)(struct ocfs2_caching_info *ci);
+       void    (*co_cache_unlock)(struct ocfs2_caching_info *ci);
+
+       /*
+        * Lock and unlock for disk I/O.  These will sleep, and should
+        * be mutexes.
+        */
+       void    (*co_io_lock)(struct ocfs2_caching_info *ci);
+       void    (*co_io_unlock)(struct ocfs2_caching_info *ci);
+};
+
+int __init init_ocfs2_uptodate_cache(void);
+void exit_ocfs2_uptodate_cache(void);
+
+void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
+                              const struct ocfs2_caching_operations *ops);
+void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci);
+void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci);
+
+u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci);
+void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci);
+void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci);
+
+int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci,
+                         struct buffer_head *bh);
+void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
+                              struct buffer_head *bh);
+void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci,
+                                  struct buffer_head *bh);
+void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci,
+                            struct buffer_head *bh);
+void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci,
+                                           sector_t block,
+                                           u32 c_len);
+int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci,
+                           struct buffer_head *bh);
+
+#endif /* OCFS2_UPTODATE_H */