projects / mirror_ubuntu-artful-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); | |
| 10 | int dax_clear_blocks(struct inode *, sector_t block, long size); | |
| 11 | int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t); | |
| 12 | int dax_truncate_page(struct inode *, loff_t from, get_block_t); | |
| 13 | int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t, | |
| 14 | dax_iodone_t); | |
| 15 | int __dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t, | |
| 16 | dax_iodone_t); | |
| d1a5f2b4 DW |
17 | |
| 18 | #ifdef CONFIG_FS_DAX | |
| 19 | struct page *read_dax_sector(struct block_device *bdev, sector_t n); | |
| 20 | #else | |
| 21 | static inline struct page *read_dax_sector(struct block_device *bdev, | |
| 22 | sector_t n) | |
| 23 | { | |
| 24 | return ERR_PTR(-ENXIO); | |
| 25 | } | |
| 26 | #endif | |
| 27 | ||
| 844f35db MW |
28 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| 29 | int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, | |
| 30 | unsigned int flags, get_block_t, dax_iodone_t); | |
| 31 | int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, | |
| 32 | unsigned int flags, get_block_t, dax_iodone_t); | |
| 33 | #else | |
| 34 | static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, | |
| 35 | pmd_t *pmd, unsigned int flags, get_block_t gb, | |
| 36 | dax_iodone_t di) | |
| 37 | { | |
| 38 | return VM_FAULT_FALLBACK; | |
| 39 | } | |
| 40 | #define __dax_pmd_fault dax_pmd_fault | |
| 41 | #endif | |
| c94c2acf MW |
42 | int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *); |
| 43 | #define dax_mkwrite(vma, vmf, gb, iod) dax_fault(vma, vmf, gb, iod) | |
| 44 | #define __dax_mkwrite(vma, vmf, gb, iod) __dax_fault(vma, vmf, gb, iod) | |
| 45 | ||
| 4897c765 MW |
46 | static inline bool vma_is_dax(struct vm_area_struct *vma) |
| 47 | { | |
| 48 | return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host); | |
| 49 | } | |
| f9fe48be RZ |
50 | |
| 51 | static inline bool dax_mapping(struct address_space *mapping) | |
| 52 | { | |
| 53 | return mapping->host && IS_DAX(mapping->host); | |
| 54 | } | |
| 9973c98e RZ |
55 | int dax_writeback_mapping_range(struct address_space *mapping, loff_t start, |
| 56 | loff_t end); | |
| c94c2acf | 57 | #endif |