118 lines
4.2 KiB
C
118 lines
4.2 KiB
C
/* -*- 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 */
|