Oops, sorry, that patch was for smbfs on -stable.  Not -current.

    ntfs has a similar problem.  It implements VOP_BMAP but fakes it,
    and ntfs_read() doesn't *USE* the buffer cache, so again sendfile()
    believes that a UIO_NOCOPY read will work when it won't.  And, again
    there is no coherency.  This is even worse then what smbfs() does.

    I think the solution for ntfs is the same as for smbfs... create a
    vop_createvobject tag that does not set VOBJBUF and, as with smbfs,
    this will cause mmap() to fail.


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