d_sb field in dentry?

Bill Hawes (whawes@star.net)
Wed, 10 Sep 1997 17:21:29 -0400

To get smbfs to work right with dentry arguments, I had to write a
function to return the super block for a dentry. The fs code needs the
super block to check some options, which are needed to look up a dentry
to get the inode that tells the super block that the dentry is rooted

This would be much easier if dentries carried a d_sb field, since
they'll be rooted to that sb for life. This would also make it easier
to do a shrink_dcache(super_block), which would be nice for unmounting,
and for purging the dcache for one fs to limit open files.

Does this seem like a reasonable addition?