commit ea16c8015e64966e3c93b361b425df35ef07b0ad
Author: Erez Zadok <[EMAIL PROTECTED]>
Date: Sun Nov 25 18:32:31 2007 -0500
Unionfs: update times in setattr
Needed to maintain Unix semantics via utimes(2).
Signed-off-by: Erez Zadok <[EMAIL PROTECTED]>
diff --git a/fs/unionfs/inode.c b/fs/unionfs/inode.c
index 77c7f33..bdefff1 100644
--- a/fs/unionfs/inode.c
+++ b/fs/unionfs/inode.c
@@ -1071,6 +1071,18 @@ static int unionfs_setattr(struct dentry *dentry, struct
iattr *ia)
/* get the size from the first lower inode */
lower_inode = unionfs_lower_inode(inode);
unionfs_copy_attr_all(inode, lower_inode);
+ /*
+ * unionfs_copy_attr_all will copy the lower times to our inode if
+ * the lower ones are newer (useful for cache coherency). However,
+ * ->setattr is the only place in which we may have to copy the
+ * lower inode times absolutely, to support utimes(2).
+ */
+ if (ia->ia_valid & ATTR_MTIME_SET)
+ inode->i_mtime = lower_inode->i_mtime;
+ if (ia->ia_valid & ATTR_CTIME)
+ inode->i_ctime = lower_inode->i_ctime;
+ if (ia->ia_valid & ATTR_ATIME_SET)
+ inode->i_atime = lower_inode->i_atime;
fsstack_copy_inode_size(inode, lower_inode);
/* if setattr succeeded, then parent dir may have changed */
unionfs_copy_attr_times(dentry->d_parent->d_inode);
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