NTFS: Truncate {a,c,m}time to the ntfs supported time granularity when

      updating the times in the inode in ntfs_setattr().

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

2 files changed, 9 insertions, 5 deletions

diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index beed90c9f551..9c5af9c8a8af 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -73,6 +73,8 @@ ToDo/Notes:
         - Fix cluster (de)allocators to work when the runlist is NULL and more
           importantly to take a locked runlist rather than them locking it
           which leads to lock reversal.
+        - Truncate {a,c,m}time to the ntfs supported time granularity when
+          updating the times in the inode in ntfs_setattr().
 
 2.1.23 - Implement extension of resident files and make writing safe as well as
          many bug fixes, cleanups, and enhancements...
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index 886214a77f90..89d844f69244 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -2430,16 +2430,18 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
                          * We skipped the truncate but must still update
                          * timestamps.
                          */
-                        ia_valid |= ATTR_MTIME|ATTR_CTIME;
+                        ia_valid |= ATTR_MTIME | ATTR_CTIME;
                 }
         }
-
         if (ia_valid & ATTR_ATIME)
-                vi->i_atime = attr->ia_atime;
+                vi->i_atime = timespec_trunc(attr->ia_atime,
+                                vi->i_sb->s_time_gran);
         if (ia_valid & ATTR_MTIME)
-                vi->i_mtime = attr->ia_mtime;
+                vi->i_mtime = timespec_trunc(attr->ia_mtime,
+                                vi->i_sb->s_time_gran);
         if (ia_valid & ATTR_CTIME)
-                vi->i_ctime = attr->ia_ctime;
+                vi->i_ctime = timespec_trunc(attr->ia_ctime,
+                                vi->i_sb->s_time_gran);
         mark_inode_dirty(vi);
 out:
         return err;