ldiskfs/kernel_patches/patches/ubuntu18/ext4-nocmtime.patch

   1 We won't change i_xtime in ldiskfs code path. But also
   2 need keep normal function out of Lustre. So we using
   3 S_NOCMTIME to indicate invoked from Lustre.
   4
   5 Index: linux-4.15.0/fs/ext4/ext4.h
   6 ===================================================================
   7 --- linux-4.15.0.orig/fs/ext4/ext4.h
   8 +++ linux-4.15.0/fs/ext4/ext4.h
   9 @@ -655,6 +655,20 @@ enum {
  10  #define EXT4_GOING_FLAGS_LOGFLUSH              0x1     /* flush log but not data */
  11  #define EXT4_GOING_FLAGS_NOLOGFLUSH            0x2     /* don't flush log nor data */
  12
  13 +#define current_time(a) ext4_current_time(a)
  14 +static inline struct timespec ext4_current_time(struct inode *inode)
  15 +{
  16 +       struct timespec now = current_kernel_time();
  17 +
  18 +       if (IS_NOCMTIME(inode))
  19 +               return inode->i_ctime;
  20 +
  21 +       /* Copy from fs/inode.c */
  22 +       if (unlikely(!inode->i_sb))
  23 +               return now;
  24 +
  25 +       return timespec_trunc(now, inode->i_sb->s_time_gran);
  26 +}
  27
  28  #if defined(__KERNEL__) && defined(CONFIG_COMPAT)
  29  /*