projects / deliverable / linux.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> | |
| 4f622938 | 6 | #include <linux/radix-tree.h> |
| c94c2acf MW |
7 | #include <asm/pgtable.h> |
| 8 | ||
| e804315d JK |
9 | /* We use lowest available exceptional entry bit for locking */ |
| 10 | #define RADIX_DAX_ENTRY_LOCK (1 << RADIX_TREE_EXCEPTIONAL_SHIFT) | |
| 11 | ||
| c94c2acf MW |
12 | ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, loff_t, |
| 13 | get_block_t, dio_iodone_t, int flags); | |
| c94c2acf MW |
14 | int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t); |
| 15 | int dax_truncate_page(struct inode *, loff_t from, get_block_t); | |
| 02fbd139 JK |
16 | int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t); |
| 17 | int __dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t); | |
| d1a5f2b4 DW |
18 | |
| 19 | #ifdef CONFIG_FS_DAX | |
| 20 | struct page *read_dax_sector(struct block_device *bdev, sector_t n); | |
| 679c8bd3 CH |
21 | int __dax_zero_page_range(struct block_device *bdev, sector_t sector, |
| 22 | unsigned int offset, unsigned int length); | |
| d1a5f2b4 DW |
23 | #else |
| 24 | static inline struct page *read_dax_sector(struct block_device *bdev, | |
| 25 | sector_t n) | |
| 26 | { | |
| 27 | return ERR_PTR(-ENXIO); | |
| 28 | } | |
| 679c8bd3 CH |
29 | static inline int __dax_zero_page_range(struct block_device *bdev, |
| 30 | sector_t sector, unsigned int offset, unsigned int length) | |
| 31 | { | |
| 32 | return -ENXIO; | |
| 33 | } | |
| d1a5f2b4 DW |
34 | #endif |
| 35 | ||
| 348e967a | 36 | #if defined(CONFIG_TRANSPARENT_HUGEPAGE) |
| 844f35db | 37 | int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, |
| 02fbd139 | 38 | unsigned int flags, get_block_t); |
| 844f35db | 39 | int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, |
| 02fbd139 | 40 | unsigned int flags, get_block_t); |
| 844f35db MW |
41 | #else |
| 42 | static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, | |
| 02fbd139 | 43 | pmd_t *pmd, unsigned int flags, get_block_t gb) |
| 844f35db MW |
44 | { |
| 45 | return VM_FAULT_FALLBACK; | |
| 46 | } | |
| 47 | #define __dax_pmd_fault dax_pmd_fault | |
| 48 | #endif | |
| c94c2acf | 49 | int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *); |
| 02fbd139 JK |
50 | #define dax_mkwrite(vma, vmf, gb) dax_fault(vma, vmf, gb) |
| 51 | #define __dax_mkwrite(vma, vmf, gb) __dax_fault(vma, vmf, gb) | |
| c94c2acf | 52 | |
| 4897c765 MW |
53 | static inline bool vma_is_dax(struct vm_area_struct *vma) |
| 54 | { | |
| 55 | return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host); | |
| 56 | } | |
| f9fe48be RZ |
57 | |
| 58 | static inline bool dax_mapping(struct address_space *mapping) | |
| 59 | { | |
| 60 | return mapping->host && IS_DAX(mapping->host); | |
| 61 | } | |
| 7f6d5b52 RZ |
62 | |
| 63 | struct writeback_control; | |
| 64 | int dax_writeback_mapping_range(struct address_space *mapping, | |
| 65 | struct block_device *bdev, struct writeback_control *wbc); | |
| c94c2acf | 66 | #endif |