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    Subject[PATCH 18/28] unix_find_other() elevate write count for touch_atime()
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    Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
    ---
    lxc-dave/net/unix/af_unix.c | 16 ++++++++++++----
    1 files changed, 12 insertions(+), 4 deletions(-)
    diff -puN net/unix/af_unix.c~C-elevate-writers-opens-part4 net/unix/af_unix.c
    --- lxc/net/unix/af_unix.c~C-elevate-writers-opens-part4 2006-08-01 16:35:09.000000000 -0700
    +++ lxc-dave/net/unix/af_unix.c 2006-08-01 16:35:27.000000000 -0700
    @@ -708,21 +708,27 @@ static struct sock *unix_find_other(stru
    err = path_lookup(sunname->sun_path, LOOKUP_FOLLOW, &nd);
    if (err)
    goto fail;
    +
    + err = mnt_want_write(nd.mnt);
    + if (err)
    + goto put_path_fail;
    +
    err = vfs_permission(&nd, MAY_WRITE);
    if (err)
    - goto put_fail;
    + goto mnt_drop_write_fail;

    err = -ECONNREFUSED;
    if (!S_ISSOCK(nd.dentry->d_inode->i_mode))
    - goto put_fail;
    + goto mnt_drop_write_fail;
    u=unix_find_socket_byinode(nd.dentry->d_inode);
    if (!u)
    - goto put_fail;
    + goto mnt_drop_write_fail;

    if (u->sk_type == type)
    touch_atime(nd.mnt, nd.dentry);

    path_release(&nd);
    + mnt_drop_write(nd.mnt);

    err=-EPROTOTYPE;
    if (u->sk_type != type) {
    @@ -742,7 +748,9 @@ static struct sock *unix_find_other(stru
    }
    return u;

    -put_fail:
    +mnt_drop_write_fail:
    + mnt_drop_write(nd.mnt);
    +put_path_fail:
    path_release(&nd);
    fail:
    *error=err;
    _
    -
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