stack.c 1.1 KB

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  1. #include <linux/module.h>
  2. #include <linux/fs.h>
  3. #include <linux/fs_stack.h>
  4. /* does _NOT_ require i_mutex to be held.
  5. *
  6. * This function cannot be inlined since i_size_{read,write} is rather
  7. * heavy-weight on 32-bit systems
  8. */
  9. void fsstack_copy_inode_size(struct inode *dst, const struct inode *src)
  10. {
  11. i_size_write(dst, i_size_read((struct inode *)src));
  12. dst->i_blocks = src->i_blocks;
  13. }
  14. EXPORT_SYMBOL_GPL(fsstack_copy_inode_size);
  15. /* copy all attributes; get_nlinks is optional way to override the i_nlink
  16. * copying
  17. */
  18. void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
  19. int (*get_nlinks)(struct inode *))
  20. {
  21. dest->i_mode = src->i_mode;
  22. dest->i_uid = src->i_uid;
  23. dest->i_gid = src->i_gid;
  24. dest->i_rdev = src->i_rdev;
  25. dest->i_atime = src->i_atime;
  26. dest->i_mtime = src->i_mtime;
  27. dest->i_ctime = src->i_ctime;
  28. dest->i_blkbits = src->i_blkbits;
  29. dest->i_flags = src->i_flags;
  30. /*
  31. * Update the nlinks AFTER updating the above fields, because the
  32. * get_links callback may depend on them.
  33. */
  34. if (!get_nlinks)
  35. dest->i_nlink = src->i_nlink;
  36. else
  37. dest->i_nlink = (*get_nlinks)(dest);
  38. }
  39. EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);