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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/ocfs2/refcounttree.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/ocfs2/refcounttree.h')
-rw-r--r--fs/ocfs2/refcounttree.h127
1 files changed, 127 insertions, 0 deletions
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
new file mode 100644
index 000000000..8197a94fe
--- /dev/null
+++ b/fs/ocfs2/refcounttree.h
@@ -0,0 +1,127 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * 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 */