projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| c94c2acf MW |
1 | #ifndef _LINUX_DAX_H |
| 2 | #define _LINUX_DAX_H | |
| 3 | ||
| 4 | #include <linux/fs.h> | |
| 5 | #include <linux/mm.h> | |
| 6 | #include <asm/pgtable.h> | |
| 7 | ||
| 8 | ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, loff_t, | |
| 9 | get_block_t, dio_iodone_t, int flags); | |
| c94c2acf MW |
10 | int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t); |
| 11 | int dax_truncate_page(struct inode *, loff_t from, get_block_t); | |
| 02fbd139 JK |
12 | int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t); |
| 13 | int __dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t); | |
| d1a5f2b4 DW |
14 | |
| 15 | #ifdef CONFIG_FS_DAX | |
| 16 | struct page *read_dax_sector(struct block_device *bdev, sector_t n); | |
| 679c8bd3 CH |
17 | int __dax_zero_page_range(struct block_device *bdev, sector_t sector, |
| 18 | unsigned int offset, unsigned int length); | |
| d1a5f2b4 DW |
19 | #else |
| 20 | static inline struct page *read_dax_sector(struct block_device *bdev, | |
| 21 | sector_t n) | |
| 22 | { | |
| 23 | return ERR_PTR(-ENXIO); | |
| 24 | } | |
| 679c8bd3 CH |
25 | static inline int __dax_zero_page_range(struct block_device *bdev, |
| 26 | sector_t sector, unsigned int offset, unsigned int length) | |
| 27 | { | |
| 28 | return -ENXIO; | |
| 29 | } | |
| d1a5f2b4 DW |
30 | #endif |
| 31 | ||
| 348e967a | 32 | #if defined(CONFIG_TRANSPARENT_HUGEPAGE) |
| 844f35db | 33 | int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, |
| 02fbd139 | 34 | unsigned int flags, get_block_t); |
| 844f35db | 35 | int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, |
| 02fbd139 | 36 | unsigned int flags, get_block_t); |
| 844f35db MW |
37 | #else |
| 38 | static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, | |
| 02fbd139 | 39 | pmd_t *pmd, unsigned int flags, get_block_t gb) |
| 844f35db MW |
40 | { |
| 41 | return VM_FAULT_FALLBACK; | |
| 42 | } | |
| 43 | #define __dax_pmd_fault dax_pmd_fault | |
| 44 | #endif | |
| c94c2acf | 45 | int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *); |
| 02fbd139 JK |
46 | #define dax_mkwrite(vma, vmf, gb) dax_fault(vma, vmf, gb) |
| 47 | #define __dax_mkwrite(vma, vmf, gb) __dax_fault(vma, vmf, gb) | |
| c94c2acf | 48 | |
| 4897c765 MW |
49 | static inline bool vma_is_dax(struct vm_area_struct *vma) |
| 50 | { | |
| 51 | return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host); | |
| 52 | } | |
| f9fe48be RZ |
53 | |
| 54 | static inline bool dax_mapping(struct address_space *mapping) | |
| 55 | { | |
| 56 | return mapping->host && IS_DAX(mapping->host); | |
| 57 | } | |
| 7f6d5b52 RZ |
58 | |
| 59 | struct writeback_control; | |
| 60 | int dax_writeback_mapping_range(struct address_space *mapping, | |
| 61 | struct block_device *bdev, struct writeback_control *wbc); | |
| c94c2acf | 62 | #endif |