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    Subject[Suspend2][ 02/13] [Suspend2] Receive storage manager message
    Date
    Routine called when netlink messages are received.

    Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

    kernel/power/storage.c | 38 ++++++++++++++++++++++++++++++++++++++
    1 files changed, 38 insertions(+), 0 deletions(-)

    diff --git a/kernel/power/storage.c b/kernel/power/storage.c
    index 91b24a6..b66efe2 100644
    --- a/kernel/power/storage.c
    +++ b/kernel/power/storage.c
    @@ -34,3 +34,41 @@ static int usm_prepare_count = 0;
    static int storage_manager_last_action = 0;
    static int storage_manager_action = 0;

    +static int usm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
    +{
    + int type;
    + int *data;
    +
    + type = nlh->nlmsg_type;
    +
    + /* A control message: ignore them */
    + if (type < NETLINK_MSG_BASE)
    + return 0;
    +
    + /* Unknown message: reply with EINVAL */
    + if (type >= USM_MSG_MAX)
    + return -EINVAL;
    +
    + /* All operations require privileges, even GET */
    + if (security_netlink_recv(skb))
    + return -EPERM;
    +
    + /* Only allow one task to receive NOFREEZE privileges */
    + if (type == NETLINK_MSG_NOFREEZE_ME && usm_helper_data.pid != -1)
    + return -EBUSY;
    +
    + data = (int*)NLMSG_DATA(nlh);
    +
    + switch (type) {
    + case USM_MSG_SUCCESS:
    + case USM_MSG_FAILED:
    + message_received = type;
    + complete(&usm_helper_data.wait_for_process);
    + break;
    + default:
    + printk("Storage manager doesn't recognise message %d.\n", type);
    + }
    +
    + return 1;
    +}
    +
    --
    Nigel Cunningham nigel at suspend2 dot net
    -
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