| Matthew Wilcox | c94c2ac | 2015-09-08 14:58:40 -0700 | [diff] [blame] | 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); |
| Dan Williams | d1a5f2b4 | 2016-01-28 20:25:31 -0800 | [diff] [blame^] | 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 | |
| Matthew Wilcox | 844f35d | 2015-09-08 14:58:57 -0700 | [diff] [blame] | 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 |
| Matthew Wilcox | c94c2ac | 2015-09-08 14:58:40 -0700 | [diff] [blame] | 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 | |
| Matthew Wilcox | 4897c76 | 2015-09-08 14:58:45 -0700 | [diff] [blame] | 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 | } |
| Ross Zwisler | f9fe48b | 2016-01-22 15:10:40 -0800 | [diff] [blame] | 50 | |
| 51 | static inline bool dax_mapping(struct address_space *mapping) |
| 52 | { |
| 53 | return mapping->host && IS_DAX(mapping->host); |
| 54 | } |
| Ross Zwisler | 9973c98 | 2016-01-22 15:10:47 -0800 | [diff] [blame] | 55 | int dax_writeback_mapping_range(struct address_space *mapping, loff_t start, |
| 56 | loff_t end); |
| Matthew Wilcox | c94c2ac | 2015-09-08 14:58:40 -0700 | [diff] [blame] | 57 | #endif |