lustre/kernel_patches/patches/vfs_races-2.6.32-rhel6.patch

   1 Index: linux-2.6.32-71.18.1.el6/fs/dcache.c
   2 ===================================================================
   3 --- linux-2.6.32-71.18.1.el6.orig/fs/dcache.c
   4 +++ linux-2.6.32-71.18.1.el6/fs/dcache.c
   5 @@ -280,6 +280,13 @@ int d_invalidate(struct dentry * dentry)
   6                 spin_unlock(&dcache_lock);
   7                 return 0;
   8         }
   9 +
  10 +       /* network invalidation by Lustre */
  11 +       if (dentry->d_flags & DCACHE_LUSTRE_INVALID) {
  12 +               spin_unlock(&dcache_lock);
  13 +               return 0;
  14 +       }
  15 +
  16         /*
  17          * Check whether to do a partial shrink_dcache
  18          * to get rid of unused child entries.
  19 Index: linux-2.6.32-71.18.1.el6/include/linux/dcache.h
  20 ===================================================================
  21 --- linux-2.6.32-71.18.1.el6.orig/include/linux/dcache.h
  22 +++ linux-2.6.32-71.18.1.el6/include/linux/dcache.h
  23 @@ -185,6 +185,7 @@ d_iput:             no              no              no       yes
  24  #define DCACHE_MANAGE_TRANSIT  0x40000 /* manage transit from this dirent */
  25  #define DCACHE_MANAGED_DENTRY \
  26         (DCACHE_MOUNTED|DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT)
  27 +#define DCACHE_LUSTRE_INVALID  0x4000000  /* Lustre invalidated */
  28
  29  extern spinlock_t dcache_lock;
  30  extern seqlock_t rename_lock;