Add the rt linux 4.1.3-rt3 as base

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

diff --git a/kernel/fs/ocfs2/refcounttree.h b/kernel/fs/ocfs2/refcounttree.h
new file mode 100644 (file)
index 0000000..6422bbc
--- /dev/null
+++ b/kernel/fs/ocfs2/refcounttree.h
@@ -0,0 +1,118 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * refcounttree.h
+ *
+ * Copyright (C) 2009 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 version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+#ifndef OCFS2_REFCOUNTTREE_H
+#define OCFS2_REFCOUNTTREE_H
+
+struct ocfs2_refcount_tree {
+       struct rb_node rf_node;
+       u64 rf_blkno;
+       u32 rf_generation;
+       struct kref rf_getcnt;
+       struct rw_semaphore rf_sem;
+       struct ocfs2_lock_res rf_lockres;
+       int rf_removed;
+
+       /* the following 4 fields are used by caching_info. */
+       spinlock_t rf_lock;
+       struct ocfs2_caching_info rf_ci;
+       struct mutex rf_io_mutex;
+       struct super_block *rf_sb;
+};
+
+void ocfs2_purge_refcount_trees(struct ocfs2_super *osb);
+int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw,
+                            struct ocfs2_refcount_tree **tree,
+                            struct buffer_head **ref_bh);
+void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
+                               struct ocfs2_refcount_tree *tree,
+                               int rw);
+
+int ocfs2_decrease_refcount(struct inode *inode,
+                           handle_t *handle, u32 cpos, u32 len,
+                           struct ocfs2_alloc_context *meta_ac,
+                           struct ocfs2_cached_dealloc_ctxt *dealloc,
+                           int delete);
+int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
+                                         u64 refcount_loc,
+                                         u64 phys_blkno,
+                                         u32 clusters,
+                                         int *credits,
+                                         int *ref_blocks);
+int ocfs2_refcount_cow(struct inode *inode,
+                      struct buffer_head *di_bh,
+                      u32 cpos, u32 write_len, u32 max_cpos);
+
+typedef int (ocfs2_post_refcount_func)(struct inode *inode,
+                                      handle_t *handle,
+                                      void *para);
+/*
+ * Some refcount caller need to do more work after we modify the data b-tree
+ * during refcount operation(including CoW and add refcount flag), and make the
+ * transaction complete. So it must give us this structure so that we can do it
+ * within our transaction.
+ *
+ */
+struct ocfs2_post_refcount {
+       int credits;                    /* credits it need for journal. */
+       ocfs2_post_refcount_func *func; /* real function. */
+       void *para;
+};
+
+int ocfs2_refcounted_xattr_delete_need(struct inode *inode,
+                                      struct ocfs2_caching_info *ref_ci,
+                                      struct buffer_head *ref_root_bh,
+                                      struct ocfs2_xattr_value_root *xv,
+                                      int *meta_add, int *credits);
+int ocfs2_refcount_cow_xattr(struct inode *inode,
+                            struct ocfs2_dinode *di,
+                            struct ocfs2_xattr_value_buf *vb,
+                            struct ocfs2_refcount_tree *ref_tree,
+                            struct buffer_head *ref_root_bh,
+                            u32 cpos, u32 write_len,
+                            struct ocfs2_post_refcount *post);
+int ocfs2_duplicate_clusters_by_page(handle_t *handle,
+                                    struct inode *inode,
+                                    u32 cpos, u32 old_cluster,
+                                    u32 new_cluster, u32 new_len);
+int ocfs2_duplicate_clusters_by_jbd(handle_t *handle,
+                                   struct inode *inode,
+                                   u32 cpos, u32 old_cluster,
+                                   u32 new_cluster, u32 new_len);
+int ocfs2_cow_sync_writeback(struct super_block *sb,
+                            struct inode *inode,
+                            u32 cpos, u32 num_clusters);
+int ocfs2_add_refcount_flag(struct inode *inode,
+                           struct ocfs2_extent_tree *data_et,
+                           struct ocfs2_caching_info *ref_ci,
+                           struct buffer_head *ref_root_bh,
+                           u32 cpos, u32 p_cluster, u32 num_clusters,
+                           struct ocfs2_cached_dealloc_ctxt *dealloc,
+                           struct ocfs2_post_refcount *post);
+int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh);
+int ocfs2_try_remove_refcount_tree(struct inode *inode,
+                                  struct buffer_head *di_bh);
+int ocfs2_increase_refcount(handle_t *handle,
+                           struct ocfs2_caching_info *ci,
+                           struct buffer_head *ref_root_bh,
+                           u64 cpos, u32 len,
+                           struct ocfs2_alloc_context *meta_ac,
+                           struct ocfs2_cached_dealloc_ctxt *dealloc);
+int ocfs2_reflink_ioctl(struct inode *inode,
+                       const char __user *oldname,
+                       const char __user *newname,
+                       bool preserve);
+#endif /* OCFS2_REFCOUNTTREE_H */