[mirror_ubuntu-jammy-kernel.git] / fs / ocfs2 / refcounttree.h

/* SPDX-License-Identifier: GPL-2.0-only */
/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * refcounttree.h
 *
 * Copyright (C) 2009 Oracle.  All rights reserved.
 */
#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);
loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
				  struct buffer_head *s_bh,
				  loff_t pos_in,
				  struct inode *t_inode,
				  struct buffer_head *t_bh,
				  loff_t pos_out,
				  loff_t len);
int ocfs2_reflink_inodes_lock(struct inode *s_inode,
			      struct buffer_head **bh1,
			      struct inode *t_inode,
			      struct buffer_head **bh2);
void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
				 struct buffer_head *s_bh,
				 struct inode *t_inode,
				 struct buffer_head *t_bh);
int ocfs2_reflink_update_dest(struct inode *dest,
			      struct buffer_head *d_bh,
			      loff_t newlen);

#endif /* OCFS2_REFCOUNTTREE_H */
Commit	Line	Data
1802d0be	1	/* SPDX-License-Identifier: GPL-2.0-only */
8dec98ed TM	2	/* -- mode: c; c-basic-offset: 8; --
	3	* vim: noexpandtab sw=8 ts=8 sts=0:
	4	*
	5	* refcounttree.h
	6	*
	7	* Copyright (C) 2009 Oracle. All rights reserved.
8dec98ed TM	8	*/
	9	#ifndef OCFS2_REFCOUNTTREE_H
	10	#define OCFS2_REFCOUNTTREE_H
	11
	12	struct ocfs2_refcount_tree {
	13	struct rb_node rf_node;
	14	u64 rf_blkno;
	15	u32 rf_generation;
83fd9c7f	16	struct kref rf_getcnt;
8dec98ed TM	17	struct rw_semaphore rf_sem;
8dec98ed TM	18	struct ocfs2_lock_res rf_lockres;
8dec98ed TM	19	int rf_removed;
	20
	21	/* the following 4 fields are used by caching_info. */
8dec98ed	22	spinlock_t rf_lock;
83fd9c7f	23	struct ocfs2_caching_info rf_ci;
8dec98ed TM	24	struct mutex rf_io_mutex;
	25	struct super_block *rf_sb;
	26	};
	27
374a263e TM	28	void ocfs2_purge_refcount_trees(struct ocfs2_super *osb);
	29	int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw,
	30	struct ocfs2_refcount_tree **tree,
	31	struct buffer_head **ref_bh);
	32	void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
	33	struct ocfs2_refcount_tree *tree,
	34	int rw);
1823cb0b TM	35
	36	int ocfs2_decrease_refcount(struct inode *inode,
	37	handle_t *handle, u32 cpos, u32 len,
	38	struct ocfs2_alloc_context *meta_ac,
6ae23c55 TM	39	struct ocfs2_cached_dealloc_ctxt *dealloc,
6ae23c55 TM	40	int delete);
bcbbb24a	41	int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
78f94673	42	u64 refcount_loc,
bcbbb24a TM	43	u64 phys_blkno,
	44	u32 clusters,
	45	int *credits,
78f94673	46	int *ref_blocks);
15502712	47	int ocfs2_refcount_cow(struct inode *inode,
c7dd3392	48	struct buffer_head *di_bh,
37f8a2bf	49	u32 cpos, u32 write_len, u32 max_cpos);
492a8a33 TM	50
	51	typedef int (ocfs2_post_refcount_func)(struct inode *inode,
	52	handle_t *handle,
	53	void *para);
	54	/*
	55	* Some refcount caller need to do more work after we modify the data b-tree
	56	* during refcount operation(including CoW and add refcount flag), and make the
	57	* transaction complete. So it must give us this structure so that we can do it
	58	* within our transaction.
	59	*
	60	*/
	61	struct ocfs2_post_refcount {
	62	int credits; /* credits it need for journal. */
	63	ocfs2_post_refcount_func func; / real function. */
	64	void *para;
	65	};
	66
	67	int ocfs2_refcounted_xattr_delete_need(struct inode *inode,
	68	struct ocfs2_caching_info *ref_ci,
	69	struct buffer_head *ref_root_bh,
	70	struct ocfs2_xattr_value_root *xv,
	71	int meta_add, int credits);
	72	int ocfs2_refcount_cow_xattr(struct inode *inode,
	73	struct ocfs2_dinode *di,
	74	struct ocfs2_xattr_value_buf *vb,
	75	struct ocfs2_refcount_tree *ref_tree,
	76	struct buffer_head *ref_root_bh,
	77	u32 cpos, u32 write_len,
	78	struct ocfs2_post_refcount *post);
3e19a25e	79	int ocfs2_duplicate_clusters_by_page(handle_t *handle,
c7dd3392	80	struct inode *inode,
3e19a25e TY	81	u32 cpos, u32 old_cluster,
	82	u32 new_cluster, u32 new_len);
	83	int ocfs2_duplicate_clusters_by_jbd(handle_t *handle,
c7dd3392	84	struct inode *inode,
3e19a25e TY	85	u32 cpos, u32 old_cluster,
	86	u32 new_cluster, u32 new_len);
	87	int ocfs2_cow_sync_writeback(struct super_block *sb,
	88	struct inode *inode,
	89	u32 cpos, u32 num_clusters);
0129241e TM	90	int ocfs2_add_refcount_flag(struct inode *inode,
	91	struct ocfs2_extent_tree *data_et,
	92	struct ocfs2_caching_info *ref_ci,
	93	struct buffer_head *ref_root_bh,
	94	u32 cpos, u32 p_cluster, u32 num_clusters,
	95	struct ocfs2_cached_dealloc_ctxt *dealloc,
	96	struct ocfs2_post_refcount *post);
8b2c0dba TM	97	int ocfs2_remove_refcount_tree(struct inode inode, struct buffer_head di_bh);
	98	int ocfs2_try_remove_refcount_tree(struct inode *inode,
	99	struct buffer_head *di_bh);
2999d12f TM	100	int ocfs2_increase_refcount(handle_t *handle,
	101	struct ocfs2_caching_info *ci,
	102	struct buffer_head *ref_root_bh,
	103	u64 cpos, u32 len,
	104	struct ocfs2_alloc_context *meta_ac,
	105	struct ocfs2_cached_dealloc_ctxt *dealloc);
bd50873d TM	106	int ocfs2_reflink_ioctl(struct inode *inode,
	107	const char __user *oldname,
	108	const char __user *newname,
	109	bool preserve);
65f098e9 DW	110	loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
	111	struct buffer_head *s_bh,
	112	loff_t pos_in,
	113	struct inode *t_inode,
	114	struct buffer_head *t_bh,
	115	loff_t pos_out,
	116	loff_t len);
	117	int ocfs2_reflink_inodes_lock(struct inode *s_inode,
	118	struct buffer_head **bh1,
	119	struct inode *t_inode,
	120	struct buffer_head **bh2);
	121	void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
	122	struct buffer_head *s_bh,
	123	struct inode *t_inode,
	124	struct buffer_head *t_bh);
	125	int ocfs2_reflink_update_dest(struct inode *dest,
	126	struct buffer_head *d_bh,
	127	loff_t newlen);
29ac8e85	128
8dec98ed	129	#endif /* OCFS2_REFCOUNTTREE_H */