| #ifndef _LINUX_DAX_H |
| #define _LINUX_DAX_H |
| |
| #include <linux/fs.h> |
| #include <linux/mm.h> |
| #include <asm/pgtable.h> |
| |
| ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, loff_t, |
| get_block_t, dio_iodone_t, int flags); |
| int dax_clear_blocks(struct inode *, sector_t block, long size); |
| int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t); |
| int dax_truncate_page(struct inode *, loff_t from, get_block_t); |
| int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t, |
| dax_iodone_t); |
| int __dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t, |
| dax_iodone_t); |
| #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
| int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, |
| unsigned int flags, get_block_t, dax_iodone_t); |
| int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, |
| unsigned int flags, get_block_t, dax_iodone_t); |
| #else |
| static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, |
| pmd_t *pmd, unsigned int flags, get_block_t gb, |
| dax_iodone_t di) |
| { |
| return VM_FAULT_FALLBACK; |
| } |
| #define __dax_pmd_fault dax_pmd_fault |
| #endif |
| int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *); |
| #define dax_mkwrite(vma, vmf, gb, iod) dax_fault(vma, vmf, gb, iod) |
| #define __dax_mkwrite(vma, vmf, gb, iod) __dax_fault(vma, vmf, gb, iod) |
| |
| static inline bool vma_is_dax(struct vm_area_struct *vma) |
| { |
| return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host); |
| } |
| |
| static inline bool dax_mapping(struct address_space *mapping) |
| { |
| return mapping->host && IS_DAX(mapping->host); |
| } |
| int dax_writeback_mapping_range(struct address_space *mapping, loff_t start, |
| loff_t end); |
| #endif |