Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull UDF and quota updates from Jan Kara:
 "A few UDF fixes and also a few patches which are preparing filesystems
  for support of project quotas in VFS"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: Fix loading of special inodes
  ocfs2: Back out change to use OCFS2_MAXQUOTAS in ocfs2_setattr()
  udf: remove redundant sys_tz declaration
  ocfs2: Don't use MAXQUOTAS value
  reiserfs: Don't use MAXQUOTAS value
  ext3: Don't use MAXQUOTAS value
  udf: Fix race between write(2) and close(2)

1 files changed, 8 insertions, 1 deletions

diff --git a/fs/udf/file.c b/fs/udf/file.c
index 86c6743ec1fe..bb15771b92ae 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -223,11 +223,18 @@ out:
 
 static int udf_release_file(struct inode *inode, struct file *filp)
 {
-        if (filp->f_mode & FMODE_WRITE) {
+        if (filp->f_mode & FMODE_WRITE &&
+            atomic_read(&inode->i_writecount) > 1) {
+                /*
+                 * Grab i_mutex to avoid races with writes changing i_size
+                 * while we are running.
+                 */
+                mutex_lock(&inode->i_mutex);
                 down_write(&UDF_I(inode)->i_data_sem);
                 udf_discard_prealloc(inode);
                 udf_truncate_tail_extent(inode);
                 up_write(&UDF_I(inode)->i_data_sem);
+                mutex_unlock(&inode->i_mutex);
         }
         return 0;
 }