1. 03 Feb, 2011 5 commits
  2. 01 Feb, 2011 1 commit
  3. 31 Jan, 2011 27 commits
  4. 29 Jan, 2011 5 commits
  5. 28 Jan, 2011 2 commits
    • Chuck Lever's avatar
      NFS: NFSv4 readdir loses entries · d1205f87
      Chuck Lever authored
      On recent 2.6.38-rc kernels, connectathon basic test 6 fails on
      NFSv4 mounts of OpenSolaris with something like:
      
      > ./test6: readdir
      > 	./test6: (/mnt/klimt/matisse.test) didn't read expected 'file.12' dir entry, pass 0
      > 	./test6: (/mnt/klimt/matisse.test) didn't read expected 'file.82' dir entry, pass 0
      > 	./test6: (/mnt/klimt/matisse.test) didn't read expected 'file.164' dir entry, pass 0
      > 	./test6: (/mnt/klimt/matisse.test) Test failed with 3 errors
      > basic tests failed
      > Tests failed, leaving /mnt/klimt mounted
      > [cel@matisse cthon04]$
      
      I narrowed the problem down to nfs4_decode_dirent() reporting that the
      decode buffer had overflowed while decoding the entries for those
      missing files.
      
      verify_attr_len() assumes both it's pointer arguments reside on the
      same page.  When these arguments point to locations on two different
      pages, verify_attr_len() can report false errors.  This can happen now
      that a large NFSv4 readdir result can span pages.
      
      We have reasonably good checking in nfs4_decode_dirent() anyway, so
      it should be safe to simply remove the extra checking.
      
      At a guess, this was introduced by commit 6650239a, "NFS: Don't use
      vm_map_ram() in readdir".
      
      Cc: stable@kernel.org [2.6.37]
      Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
      Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      d1205f87
    • Chuck Lever's avatar
      NFS: Micro-optimize nfs4_decode_dirent() · c08e76d0
      Chuck Lever authored
      Make the decoding of NFSv4 directory entries slightly more efficient
      by:
      
        1.  Avoiding unnecessary byte swapping when checking XDR booleans,
            and
      
        2.  Not bumping "p" when its value will be immediately replaced by
            xdr_inline_decode()
      
      This commit makes nfs4_decode_dirent() consistent with similar logic
      in the other two decode_dirent() functions.
      Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
      Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
      c08e76d0