linux/fs/stack.c
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   1#include <linux/module.h>
   2#include <linux/fs.h>
   3#include <linux/fs_stack.h>
   4
   5/* does _NOT_ require i_mutex to be held.
   6 *
   7 * This function cannot be inlined since i_size_{read,write} is rather
   8 * heavy-weight on 32-bit systems
   9 */
  10void fsstack_copy_inode_size(struct inode *dst, const struct inode *src)
  11{
  12        i_size_write(dst, i_size_read((struct inode *)src));
  13        dst->i_blocks = src->i_blocks;
  14}
  15EXPORT_SYMBOL_GPL(fsstack_copy_inode_size);
  16
  17/* copy all attributes; get_nlinks is optional way to override the i_nlink
  18 * copying
  19 */
  20void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
  21                                int (*get_nlinks)(struct inode *))
  22{
  23        dest->i_mode = src->i_mode;
  24        dest->i_uid = src->i_uid;
  25        dest->i_gid = src->i_gid;
  26        dest->i_rdev = src->i_rdev;
  27        dest->i_atime = src->i_atime;
  28        dest->i_mtime = src->i_mtime;
  29        dest->i_ctime = src->i_ctime;
  30        dest->i_blkbits = src->i_blkbits;
  31        dest->i_flags = src->i_flags;
  32
  33        /*
  34         * Update the nlinks AFTER updating the above fields, because the
  35         * get_links callback may depend on them.
  36         */
  37        if (!get_nlinks)
  38                dest->i_nlink = src->i_nlink;
  39        else
  40                dest->i_nlink = (*get_nlinks)(dest);
  41}
  42EXPORT_SYMBOL_GPL(fsstack_copy_attr_all);
  43
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