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 | ||
| c8b8e32d | 12 | ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, |
| c94c2acf | 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 | 16 | int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t); |
| ac401cc7 JK |
17 | int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index); |
| 18 | void dax_wake_mapping_entry_waiter(struct address_space *mapping, | |
| 19 | pgoff_t index, bool wake_all); | |
| d1a5f2b4 DW |
20 | |
| 21 | #ifdef CONFIG_FS_DAX | |
| 22 | struct page *read_dax_sector(struct block_device *bdev, sector_t n); | |
| bc2466e4 | 23 | void dax_unlock_mapping_entry(struct address_space *mapping, pgoff_t index); |
| 679c8bd3 CH |
24 | int __dax_zero_page_range(struct block_device *bdev, sector_t sector, |
| 25 | unsigned int offset, unsigned int length); | |
| d1a5f2b4 DW |
26 | #else |
| 27 | static inline struct page *read_dax_sector(struct block_device *bdev, | |
| 28 | sector_t n) | |
| 29 | { | |
| 30 | return ERR_PTR(-ENXIO); | |
| 31 | } | |
| bc2466e4 JK |
32 | /* Shouldn't ever be called when dax is disabled. */ |
| 33 | static inline void dax_unlock_mapping_entry(struct address_space *mapping, | |
| 34 | pgoff_t index) | |
| 35 | { | |
| 36 | BUG(); | |
| 37 | } | |
| 679c8bd3 CH |
38 | static inline int __dax_zero_page_range(struct block_device *bdev, |
| 39 | sector_t sector, unsigned int offset, unsigned int length) | |
| 40 | { | |
| 41 | return -ENXIO; | |
| 42 | } | |
| d1a5f2b4 DW |
43 | #endif |
| 44 | ||
| 348e967a | 45 | #if defined(CONFIG_TRANSPARENT_HUGEPAGE) |
| 844f35db | 46 | int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, |
| 02fbd139 | 47 | unsigned int flags, get_block_t); |
| 844f35db MW |
48 | #else |
| 49 | static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, | |
| 02fbd139 | 50 | pmd_t *pmd, unsigned int flags, get_block_t gb) |
| 844f35db MW |
51 | { |
| 52 | return VM_FAULT_FALLBACK; | |
| 53 | } | |
| 844f35db | 54 | #endif |
| c94c2acf | 55 | int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *); |
| 02fbd139 | 56 | #define dax_mkwrite(vma, vmf, gb) dax_fault(vma, vmf, gb) |
| c94c2acf | 57 | |
| 4897c765 MW |
58 | static inline bool vma_is_dax(struct vm_area_struct *vma) |
| 59 | { | |
| 60 | return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host); | |
| 61 | } | |
| f9fe48be RZ |
62 | |
| 63 | static inline bool dax_mapping(struct address_space *mapping) | |
| 64 | { | |
| 65 | return mapping->host && IS_DAX(mapping->host); | |
| 66 | } | |
| 7f6d5b52 RZ |
67 | |
| 68 | struct writeback_control; | |
| 69 | int dax_writeback_mapping_range(struct address_space *mapping, | |
| 70 | struct block_device *bdev, struct writeback_control *wbc); | |
| c94c2acf | 71 | #endif |