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c87c299776
Currently the btrfs_buffered_write() is preparing multiple page a time, allowing a better performance. But the current trend is to support larger folio as an optimization, instead of implementing own multi-page optimization. This is inspired by generic_perform_write(), which is copying one folio a time. Such change will prepare us to migrate to implement the write_begin() and write_end() callbacks, and make every involved function a little easier. Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef BTRFS_FILE_H
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#define BTRFS_FILE_H
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#include <linux/types.h>
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struct file;
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struct extent_state;
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struct kiocb;
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struct iov_iter;
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struct page;
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struct btrfs_ioctl_encoded_io_args;
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struct btrfs_drop_extents_args;
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struct btrfs_inode;
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struct btrfs_root;
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struct btrfs_path;
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struct btrfs_replace_extent_info;
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struct btrfs_trans_handle;
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extern const struct file_operations btrfs_file_operations;
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int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
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int btrfs_drop_extents(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct btrfs_inode *inode,
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struct btrfs_drop_extents_args *args);
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int btrfs_replace_file_extents(struct btrfs_inode *inode,
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struct btrfs_path *path, const u64 start,
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const u64 end,
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struct btrfs_replace_extent_info *extent_info,
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struct btrfs_trans_handle **trans_out);
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int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
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struct btrfs_inode *inode, u64 start, u64 end);
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ssize_t btrfs_do_write_iter(struct kiocb *iocb, struct iov_iter *from,
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const struct btrfs_ioctl_encoded_io_args *encoded);
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int btrfs_release_file(struct inode *inode, struct file *file);
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int btrfs_dirty_page(struct btrfs_inode *inode, struct page *page, loff_t pos,
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size_t write_bytes, struct extent_state **cached, bool noreserve);
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int btrfs_fdatawrite_range(struct btrfs_inode *inode, loff_t start, loff_t end);
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int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos,
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size_t *write_bytes, bool nowait);
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void btrfs_check_nocow_unlock(struct btrfs_inode *inode);
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bool btrfs_find_delalloc_in_range(struct btrfs_inode *inode, u64 start, u64 end,
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struct extent_state **cached_state,
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u64 *delalloc_start_ret, u64 *delalloc_end_ret);
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int btrfs_write_check(struct kiocb *iocb, size_t count);
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ssize_t btrfs_buffered_write(struct kiocb *iocb, struct iov_iter *i);
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#endif
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