include/linux/dax.h

   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);
  17 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
  18 int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *,
  19                                 unsigned int flags, get_block_t, dax_iodone_t);
  20 int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *,
  21                                 unsigned int flags, get_block_t, dax_iodone_t);
  22 #else
  23 static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr,
  24                                 pmd_t *pmd, unsigned int flags, get_block_t gb,
  25                                 dax_iodone_t di)
  26 {
  27         return VM_FAULT_FALLBACK;
  28 }
  29 #define __dax_pmd_fault dax_pmd_fault
  30 #endif
  31 int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *);
  32 #define dax_mkwrite(vma, vmf, gb, iod)          dax_fault(vma, vmf, gb, iod)
  33 #define __dax_mkwrite(vma, vmf, gb, iod)        __dax_fault(vma, vmf, gb, iod)
  34
  35 static inline bool vma_is_dax(struct vm_area_struct *vma)
  36 {
  37         return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host);
  38 }
  39 #endif