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    Subject[PATCH] NFS: Restore missing hunk in NFS mount option parser
    Automounter maps can contain mount options valid for other NFS
    implementations but not for Linux. The Linux automounter uses the
    mount command's "-s" command line option ("s" for "sloppy") so that
    mount requests containing such options are not rejected.

    Commit f45663ce5fb30f76a3414ab3ac69f4dd320e760a attempted to address a
    known regression with text-based NFS mount option parsing. Unrecognized
    mount options would cause mount requests to fail, even if the "-s"
    option was used on the mount command line.

    Unfortunately, this commit was not complete as submitted. It adds a
    new mount option, "sloppy". But it is missing a hunk, so it now allows
    NFS mounts with unrecognized mount options, even if the "sloppy" option
    is not present. This could be a problem if a required critical mount
    option such as "sync" is misspelled, for example, and is considered a
    regression from 2.6.26.

    This patch restores the missing hunk. Now, the default behavior of
    text-based NFS mount options is as before: any unrecognized mount option
    will cause the mount to fail.

    Please include this in 2.6.27-rc.

    Thanks to Neil Brown for reporting this.

    Signed-off-by: Chuck Lever <>
    Acked-by: J. Bruce Fields <>

    fs/nfs/super.c | 6 ++++++
    1 files changed, 6 insertions(+), 0 deletions(-)

    diff --git a/fs/nfs/super.c b/fs/nfs/super.c
    index 5b2aa04..e3ac650 100644
    --- a/fs/nfs/super.c
    +++ b/fs/nfs/super.c
    @@ -1279,6 +1279,12 @@ static int nfs_parse_mount_options(char *raw,

    + if (errors > 0) {
    + dfprintk(MOUNT, "NFS: parsing encountered %d error%s\n",
    + errors, (errors == 1 ? "" : "s"));
    + if (!sloppy)
    + return 0;
    + }
    return 1;


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