lustre/kernel_patches/patches/iallocsem_consistency.patch

   1 Index: linux-2.6.9/fs/attr.c
   2 ===================================================================
   3 --- linux-2.6.9/fs.orig/attr.c  2006-03-10 17:20:39.000000000 +0200
   4 +++ linux-2.6.9/fs/attr.c       2006-04-09 01:21:44.000000000 +0300
   5 @@ -177,6 +177,9 @@
   6         if (!attr->ia_valid)
   7                 return 0;
   8
   9 +        if (ia_valid & ATTR_SIZE)
  10 +                down_write(&dentry->d_inode->i_alloc_sem);
  11 +
  12         if (inode->i_op && inode->i_op->setattr) {
  13                 audit_notify_watch(inode, MAY_WRITE);
  14                 error = security_inode_setattr(dentry, attr);
  15 @@ -194,6 +197,10 @@
  16                                 error = inode_setattr(inode, attr);
  17                 }
  18         }
  19 +
  20 +        if (ia_valid & ATTR_SIZE)
  21 +                up_write(&dentry->d_inode->i_alloc_sem);
  22 +
  23         if (!error) {
  24                 unsigned long dn_mask = setattr_mask(ia_valid);
  25                 if (dn_mask)
  26 Index: linux-2.6.9/fs/open.c
  27 ===================================================================
  28 --- linux-2.6.9/fs.orig/open.c  2006-04-09 01:18:08.000000000 +0300
  29 +++ linux-2.6.9/fs/open.c       2006-04-09 01:22:29.000000000 +0300
  30 @@ -205,16 +205,16 @@
  31         newattrs.ia_size = length;
  32         newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
  33         down(&dentry->d_inode->i_sem);
  34 -       down_write(&dentry->d_inode->i_alloc_sem);
  35         if (called_from_open)
  36                 newattrs.ia_valid |= ATTR_FROM_OPEN;
  37         if (op->setattr_raw) {
  38                 newattrs.ia_valid |= ATTR_RAW;
  39                 newattrs.ia_ctime = CURRENT_TIME;
  40 +               down_write(&dentry->d_inode->i_alloc_sem);
  41                 err = op->setattr_raw(dentry->d_inode, &newattrs);
  42 +               up_write(&dentry->d_inode->i_alloc_sem);
  43         } else
  44                 err = notify_change(dentry, &newattrs);
  45 -       up_write(&dentry->d_inode->i_alloc_sem);
  46         up(&dentry->d_inode->i_sem);
  47         return err;
  48  }