| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | /* |
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| 3 | * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. |
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| 4 | */ |
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| 5 | |
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| 6 | #ifndef OCFS2_AOPS_H |
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| 7 | #define OCFS2_AOPS_H |
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| 8 | |
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| 9 | #include <linux/fs.h> |
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| 10 | |
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| 11 | int ocfs2_map_folio_blocks(struct folio *folio, u64 *p_blkno, |
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| 12 | struct inode *inode, unsigned int from, |
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| 13 | unsigned int to, int new); |
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| 14 | |
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| 15 | void ocfs2_unlock_and_free_folios(struct folio **folios, int num_folios); |
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| 16 | |
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| 17 | int walk_page_buffers( handle_t *handle, |
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| 18 | struct buffer_head *head, |
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| 19 | unsigned from, |
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| 20 | unsigned to, |
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| 21 | int *partial, |
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| 22 | int (*fn)( handle_t *handle, |
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| 23 | struct buffer_head *bh)); |
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| 24 | |
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| 25 | int ocfs2_write_end_nolock(struct address_space *mapping, |
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| 26 | loff_t pos, unsigned len, unsigned copied, void *fsdata); |
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| 27 | |
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| 28 | typedef enum { |
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| 29 | OCFS2_WRITE_BUFFER = 0, |
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| 30 | OCFS2_WRITE_DIRECT, |
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| 31 | OCFS2_WRITE_MMAP, |
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| 32 | } ocfs2_write_type_t; |
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| 33 | |
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| 34 | int ocfs2_write_begin_nolock(struct address_space *mapping, |
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| 35 | loff_t pos, unsigned len, ocfs2_write_type_t type, |
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| 36 | struct folio **foliop, void **fsdata, |
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| 37 | struct buffer_head *di_bh, struct folio *mmap_folio); |
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| 38 | |
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| 39 | int ocfs2_read_inline_data(struct inode *inode, struct folio *folio, |
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| 40 | struct buffer_head *di_bh); |
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| 41 | int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size); |
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| 42 | |
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| 43 | int ocfs2_get_block(struct inode *inode, sector_t iblock, |
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| 44 | struct buffer_head *bh_result, int create); |
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| 45 | /* all ocfs2_dio_end_io()'s fault */ |
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| 46 | #define ocfs2_iocb_is_rw_locked(iocb) \ |
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| 47 | test_bit(0, (unsigned long *)&iocb->private) |
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| 48 | static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) |
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| 49 | { |
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| 50 | set_bit(nr: 0, addr: (unsigned long *)&iocb->private); |
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| 51 | if (level) |
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| 52 | set_bit(nr: 1, addr: (unsigned long *)&iocb->private); |
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| 53 | else |
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| 54 | clear_bit(nr: 1, addr: (unsigned long *)&iocb->private); |
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| 55 | } |
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| 56 | |
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| 57 | /* |
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| 58 | * Using a named enum representing lock types in terms of #N bit stored in |
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| 59 | * iocb->private, which is going to be used for communication between |
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| 60 | * ocfs2_dio_end_io() and ocfs2_file_write/read_iter(). |
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| 61 | */ |
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| 62 | enum ocfs2_iocb_lock_bits { |
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| 63 | OCFS2_IOCB_RW_LOCK = 0, |
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| 64 | OCFS2_IOCB_RW_LOCK_LEVEL, |
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| 65 | OCFS2_IOCB_NUM_LOCKS |
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| 66 | }; |
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| 67 | |
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| 68 | #define ocfs2_iocb_init_rw_locked(iocb) \ |
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| 69 | (iocb->private = NULL) |
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| 70 | #define ocfs2_iocb_clear_rw_locked(iocb) \ |
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| 71 | clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private) |
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| 72 | #define ocfs2_iocb_rw_locked_level(iocb) \ |
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| 73 | test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private) |
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| 74 | |
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| 75 | #endif /* OCFS2_FILE_H */ |
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| 76 | |
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