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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | /* SPDX-License-Identifier: GPL-2.0 */ #ifndef LINUX_IOMAP_H #define LINUX_IOMAP_H #include <linux/types.h> struct bio; struct dax_device; struct inode; struct iomap_iter; struct kiocb; struct iov_iter; struct vm_fault; /* iomap type values */ #define IOMAP_HOLE 0 #define IOMAP_DELALLOC 1 #define IOMAP_MAPPED 2 #define IOMAP_UNWRITTEN 3 #define IOMAP_INLINE 4 /* iomap flags */ #define IOMAP_F_NEW (1U << 0) #define IOMAP_F_DIRTY (1U << 1) #define IOMAP_F_SHARED (1U << 2) #define IOMAP_F_MERGED (1U << 3) #define IOMAP_F_BUFFER_HEAD (1U << 4) #define IOMAP_F_ZONE_APPEND (1U << 5) #define IOMAP_F_PRIVATE (1U << 12) /* Flags for iomap_begin */ #define IOMAP_WRITE (1 << 0) #define IOMAP_ZERO (1 << 1) #define IOMAP_REPORT (1 << 2) #define IOMAP_FAULT (1 << 3) #define IOMAP_DIRECT (1 << 4) #define IOMAP_NOWAIT (1 << 5) #define IOMAP_OVERWRITE_ONLY (1 << 6) #define IOMAP_UNSHARE (1 << 7) #define IOMAP_DAX (1 << 8) #define IOMAP_ATOMIC (1 << 9) /* IOMAP_NULL_ADDR indicates a hole/unwritten block address */ #define IOMAP_NULL_ADDR ((u64)-1) /* Additional iomap flags */ #define IOMAP_F_ATOMIC_BIO (1U << 6) /* iomap DIO end_io flags */ #define IOMAP_DIO_UNWRITTEN (1 << 0) #define IOMAP_DIO_COW (1 << 1) /* iomap_dio_rw flags */ #define IOMAP_DIO_FORCE_WAIT (1 << 0) #define IOMAP_DIO_OVERWRITE_ONLY (1 << 1) struct iomap { u64 addr; loff_t offset; u64 length; u16 type; u16 flags; struct block_device *bdev; struct dax_device *dax_dev; void *inline_data; }; struct iomap_ops { int (*iomap_begin)(struct inode *inode, loff_t pos, loff_t length, unsigned int flags, struct iomap *iomap, struct iomap *srcmap); int (*iomap_end)(struct inode *inode, loff_t pos, loff_t length, ssize_t written, unsigned int flags, struct iomap *iomap); }; struct iomap_dio_ops { int (*end_io)(struct kiocb *iocb, ssize_t size, int error, unsigned int flags); void (*submit_io)(const struct iomap_iter *iter, struct bio *bio, loff_t file_offset); struct bio_set *bio_set; }; struct iomap_iter; /* Stubs for U-Boot - these are not actually used in read-only mode */ static inline ssize_t iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, const struct iomap_ops *ops, const struct iomap_dio_ops *dops, unsigned int dio_flags, void *private, size_t done_before) { return -EOPNOTSUPP; } static inline loff_t iomap_seek_hole(struct inode *inode, loff_t pos, const struct iomap_ops *ops) { return -EOPNOTSUPP; } static inline loff_t iomap_seek_data(struct inode *inode, loff_t pos, const struct iomap_ops *ops) { return -EOPNOTSUPP; } #endif /* LINUX_IOMAP_H */ |