LXR linux/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
   8ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, loff_t,
   9                  get_block_t, dio_iodone_t, int flags);
  10int dax_clear_blocks(struct inode *, sector_t block, long size);
  11int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t);
  12int dax_truncate_page(struct inode *, loff_t from, get_block_t);
  13int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t,
  14                dax_iodone_t);
  15int __dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t,
  16                dax_iodone_t);
  17#ifdef CONFIG_TRANSPARENT_HUGEPAGE
  18int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *,
  19                                unsigned int flags, get_block_t, dax_iodone_t);
  20int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *,
  21                                unsigned int flags, get_block_t, dax_iodone_t);
  22#else
  23static 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
  31int 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
  35static 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
  40