• J. Bruce Fields's avatar
    nfsd: eliminate an unnecessary acl size limit · 2b86e3aa
    J. Bruce Fields authored
    We're unnecessarily limiting the size of an ACL to less than what most
    filesystems will support.  Some users do hit the limit and it's
    confusing and unnecessary.
    
    It still seems prudent to impose some limit on the number of ACEs the
    client gives us before passing it straight to kmalloc().  So, let's just
    limit it to the maximum number that would be possible given the amount
    of data left in the argument buffer.
    
    That will still leave one limit beyond whatever the filesystem imposes:
    the client and server negotiate a limit on the size of a request, which
    we have to respect.
    
    But we're no longer imposing any additional arbitrary limit.
    
    struct nfs4_ace is 20 bytes on my system and the maximum call size we'll
    negotiate is about a megabyte, so in practice this is limiting the
    allocation here to about a megabyte.
    Reported-by: default avatar"de Vandiere, Louis" <louis.devandiere@atos.net>
    Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
    2b86e3aa