1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _BCACHEFS_FS_IO_PAGECACHE_H
3 #define _BCACHEFS_FS_IO_PAGECACHE_H
5 #include <linux/pagemap.h>
7 typedef DARRAY(struct folio
*) folios
;
9 int bch2_filemap_get_contig_folios_d(struct address_space
*, loff_t
,
10 u64
, int, gfp_t
, folios
*);
11 int bch2_write_invalidate_inode_pages_range(struct address_space
*, loff_t
, loff_t
);
14 * Use u64 for the end pos and sector helpers because if the folio covers the
15 * max supported range of the mapping, the start offset of the next folio
16 * overflows loff_t. This breaks much of the range based processing in the
17 * buffered write path.
19 static inline u64
folio_end_pos(struct folio
*folio
)
21 return folio_pos(folio
) + folio_size(folio
);
24 static inline size_t folio_sectors(struct folio
*folio
)
26 return PAGE_SECTORS
<< folio_order(folio
);
29 static inline loff_t
folio_sector(struct folio
*folio
)
31 return folio_pos(folio
) >> 9;
34 static inline u64
folio_end_sector(struct folio
*folio
)
36 return folio_end_pos(folio
) >> 9;
39 #define BCH_FOLIO_SECTOR_STATE() \
46 enum bch_folio_sector_state
{
47 #define x(n) SECTOR_##n,
48 BCH_FOLIO_SECTOR_STATE()
52 struct bch_folio_sector
{
53 /* Uncompressed, fully allocated replicas (or on disk reservation): */
54 unsigned nr_replicas
:4;
56 /* Owns PAGE_SECTORS * replicas_reserved sized in memory reservation: */
57 unsigned replicas_reserved
:4;
60 enum bch_folio_sector_state state
:8;
67 * Is the sector state up to date with the btree?
68 * (Not the data itself)
71 struct bch_folio_sector s
[];
74 /* Helper for when we need to add debug instrumentation: */
75 static inline void bch2_folio_sector_set(struct folio
*folio
,
77 unsigned i
, unsigned n
)
82 /* file offset (to folio offset) to bch_folio_sector index */
83 static inline int folio_pos_to_s(struct folio
*folio
, loff_t pos
)
85 u64 f_offset
= pos
- folio_pos(folio
);
87 BUG_ON(pos
< folio_pos(folio
) || pos
>= folio_end_pos(folio
));
88 return f_offset
>> SECTOR_SHIFT
;
91 /* for newly allocated folios: */
92 static inline void __bch2_folio_release(struct folio
*folio
)
94 kfree(folio_detach_private(folio
));
97 static inline void bch2_folio_release(struct folio
*folio
)
99 EBUG_ON(!folio_test_locked(folio
));
100 __bch2_folio_release(folio
);
103 static inline struct bch_folio
*__bch2_folio(struct folio
*folio
)
105 return folio_has_private(folio
)
106 ? (struct bch_folio
*) folio_get_private(folio
)
110 static inline struct bch_folio
*bch2_folio(struct folio
*folio
)
112 EBUG_ON(!folio_test_locked(folio
));
114 return __bch2_folio(folio
);
117 struct bch_folio
*__bch2_folio_create(struct folio
*, gfp_t
);
118 struct bch_folio
*bch2_folio_create(struct folio
*, gfp_t
);
120 struct bch2_folio_reservation
{
121 struct disk_reservation disk
;
122 struct quota_res quota
;
125 static inline unsigned inode_nr_replicas(struct bch_fs
*c
, struct bch_inode_info
*inode
)
127 /* XXX: this should not be open coded */
128 return inode
->ei_inode
.bi_data_replicas
129 ? inode
->ei_inode
.bi_data_replicas
- 1
130 : c
->opts
.data_replicas
;
133 static inline void bch2_folio_reservation_init(struct bch_fs
*c
,
134 struct bch_inode_info
*inode
,
135 struct bch2_folio_reservation
*res
)
137 memset(res
, 0, sizeof(*res
));
139 res
->disk
.nr_replicas
= inode_nr_replicas(c
, inode
);
142 int bch2_folio_set(struct bch_fs
*, subvol_inum
, struct folio
**, unsigned);
143 void bch2_bio_page_state_set(struct bio
*, struct bkey_s_c
);
145 void bch2_mark_pagecache_unallocated(struct bch_inode_info
*, u64
, u64
);
146 void bch2_mark_pagecache_reserved(struct bch_inode_info
*, u64
, u64
);
148 int bch2_get_folio_disk_reservation(struct bch_fs
*,
149 struct bch_inode_info
*,
150 struct folio
*, bool);
152 void bch2_folio_reservation_put(struct bch_fs
*,
153 struct bch_inode_info
*,
154 struct bch2_folio_reservation
*);
155 int bch2_folio_reservation_get(struct bch_fs
*,
156 struct bch_inode_info
*,
158 struct bch2_folio_reservation
*,
161 void bch2_set_folio_dirty(struct bch_fs
*,
162 struct bch_inode_info
*,
164 struct bch2_folio_reservation
*,
167 vm_fault_t
bch2_page_fault(struct vm_fault
*);
168 vm_fault_t
bch2_page_mkwrite(struct vm_fault
*);
169 void bch2_invalidate_folio(struct folio
*, size_t, size_t);
170 bool bch2_release_folio(struct folio
*, gfp_t
);
172 loff_t
bch2_seek_pagecache_data(struct inode
*, loff_t
, loff_t
, unsigned, bool);
173 loff_t
bch2_seek_pagecache_hole(struct inode
*, loff_t
, loff_t
, unsigned, bool);
174 int bch2_clamp_data_hole(struct inode
*, u64
*, u64
*, unsigned, bool);
176 #endif /* _BCACHEFS_FS_IO_PAGECACHE_H */