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127 lines
4.3 KiB
127 lines
4.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* refcounttree.h |
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* |
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* Copyright (C) 2009 Oracle. All rights reserved. |
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*/ |
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#ifndef OCFS2_REFCOUNTTREE_H |
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#define OCFS2_REFCOUNTTREE_H |
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struct ocfs2_refcount_tree { |
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struct rb_node rf_node; |
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u64 rf_blkno; |
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u32 rf_generation; |
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struct kref rf_getcnt; |
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struct rw_semaphore rf_sem; |
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struct ocfs2_lock_res rf_lockres; |
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int rf_removed; |
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/* the following 4 fields are used by caching_info. */ |
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spinlock_t rf_lock; |
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struct ocfs2_caching_info rf_ci; |
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struct mutex rf_io_mutex; |
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struct super_block *rf_sb; |
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}; |
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void ocfs2_purge_refcount_trees(struct ocfs2_super *osb); |
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int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw, |
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struct ocfs2_refcount_tree **tree, |
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struct buffer_head **ref_bh); |
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void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb, |
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struct ocfs2_refcount_tree *tree, |
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int rw); |
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int ocfs2_decrease_refcount(struct inode *inode, |
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handle_t *handle, u32 cpos, u32 len, |
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struct ocfs2_alloc_context *meta_ac, |
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struct ocfs2_cached_dealloc_ctxt *dealloc, |
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int delete); |
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int ocfs2_prepare_refcount_change_for_del(struct inode *inode, |
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u64 refcount_loc, |
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u64 phys_blkno, |
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u32 clusters, |
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int *credits, |
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int *ref_blocks); |
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int ocfs2_refcount_cow(struct inode *inode, |
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struct buffer_head *di_bh, |
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u32 cpos, u32 write_len, u32 max_cpos); |
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typedef int (ocfs2_post_refcount_func)(struct inode *inode, |
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handle_t *handle, |
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void *para); |
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/* |
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* Some refcount caller need to do more work after we modify the data b-tree |
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* during refcount operation(including CoW and add refcount flag), and make the |
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* transaction complete. So it must give us this structure so that we can do it |
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* within our transaction. |
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* |
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*/ |
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struct ocfs2_post_refcount { |
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int credits; /* credits it need for journal. */ |
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ocfs2_post_refcount_func *func; /* real function. */ |
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void *para; |
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}; |
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int ocfs2_refcounted_xattr_delete_need(struct inode *inode, |
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struct ocfs2_caching_info *ref_ci, |
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struct buffer_head *ref_root_bh, |
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struct ocfs2_xattr_value_root *xv, |
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int *meta_add, int *credits); |
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int ocfs2_refcount_cow_xattr(struct inode *inode, |
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struct ocfs2_dinode *di, |
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struct ocfs2_xattr_value_buf *vb, |
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struct ocfs2_refcount_tree *ref_tree, |
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struct buffer_head *ref_root_bh, |
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u32 cpos, u32 write_len, |
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struct ocfs2_post_refcount *post); |
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int ocfs2_duplicate_clusters_by_page(handle_t *handle, |
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struct inode *inode, |
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u32 cpos, u32 old_cluster, |
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u32 new_cluster, u32 new_len); |
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int ocfs2_duplicate_clusters_by_jbd(handle_t *handle, |
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struct inode *inode, |
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u32 cpos, u32 old_cluster, |
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u32 new_cluster, u32 new_len); |
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int ocfs2_cow_sync_writeback(struct super_block *sb, |
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struct inode *inode, |
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u32 cpos, u32 num_clusters); |
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int ocfs2_add_refcount_flag(struct inode *inode, |
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struct ocfs2_extent_tree *data_et, |
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struct ocfs2_caching_info *ref_ci, |
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struct buffer_head *ref_root_bh, |
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u32 cpos, u32 p_cluster, u32 num_clusters, |
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struct ocfs2_cached_dealloc_ctxt *dealloc, |
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struct ocfs2_post_refcount *post); |
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int ocfs2_remove_refcount_tree(struct inode *inode, struct buffer_head *di_bh); |
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int ocfs2_try_remove_refcount_tree(struct inode *inode, |
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struct buffer_head *di_bh); |
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int ocfs2_increase_refcount(handle_t *handle, |
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struct ocfs2_caching_info *ci, |
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struct buffer_head *ref_root_bh, |
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u64 cpos, u32 len, |
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struct ocfs2_alloc_context *meta_ac, |
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struct ocfs2_cached_dealloc_ctxt *dealloc); |
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int ocfs2_reflink_ioctl(struct inode *inode, |
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const char __user *oldname, |
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const char __user *newname, |
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bool preserve); |
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loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode, |
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struct buffer_head *s_bh, |
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loff_t pos_in, |
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struct inode *t_inode, |
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struct buffer_head *t_bh, |
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loff_t pos_out, |
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loff_t len); |
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int ocfs2_reflink_inodes_lock(struct inode *s_inode, |
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struct buffer_head **bh1, |
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struct inode *t_inode, |
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struct buffer_head **bh2); |
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void ocfs2_reflink_inodes_unlock(struct inode *s_inode, |
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struct buffer_head *s_bh, |
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struct inode *t_inode, |
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struct buffer_head *t_bh); |
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int ocfs2_reflink_update_dest(struct inode *dest, |
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struct buffer_head *d_bh, |
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loff_t newlen); |
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#endif /* OCFS2_REFCOUNTTREE_H */
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