Doug / smarc-fsl-linux-kernel

04 Apr, 2009

1 commit

  • ce0d9d725   Staging: dst: core files. ... Browse Code »

    This patch contains DST core files, which introduce
    block layer, connector and sysfs registration glue and main headers.

    Connector is used for the configuration of the node (its type, address,
    device name and so on). Sysfs provides bits of information about running
    devices in the following format:

    +/*
    + * DST sysfs tree for device called 'storage':
    + *
    + * /sys/bus/dst/devices/storage/
    + * /sys/bus/dst/devices/storage/type : 192.168.4.80:1025
    + * /sys/bus/dst/devices/storage/size : 800
    + * /sys/bus/dst/devices/storage/name : storage
    + */

    DST header contains structure definitions and protocol command description.

    Signed-off-by: Evgeniy Polyakov
    Signed-off-by: Greg Kroah-Hartman

    Evgeniy Polyakov
     

03 Feb, 2009

1 commit

  • 1a5645bc9   connector: create connector workqueue only while needed once ... Browse Code »

    The netlink connector uses its own workqueue to relay the datas sent
    from userspace to the appropriate callback. If you launch the test
    from Documentation/connector and change it a bit to send a high flow
    of data, you will see thousands of events coming to the "cqueue"
    workqueue by looking at the workqueue tracer.

    This flow of events can be sent very quickly. So, to not encumber the
    kevent workqueue and delay other jobs, the "cqueue" workqueue should
    remain.

    But this workqueue is pointless most of the time, it will always be
    created (assuming you have built it of course) although only
    developpers with specific needs will use it.

    So avoid this "most of the time useless task", this patch proposes to
    create this workqueue only when needed once. The first jobs to be
    sent to connector callbacks will be sent to kevent while the "cqueue"
    thread creation will be scheduled to kevent too.

    The following jobs will continue to be scheduled to keventd until the
    cqueue workqueue is created, and then the rest of the jobs will
    continue to perform as usual, through this dedicated workqueue.

    Each time I tested this patch, only the first event was sent to
    keventd, the rest has been sent to cqueue which have been created
    quickly.

    Also, this patch fixes some trailing whitespaces on the connector files.

    Signed-off-by: Frederic Weisbecker
    Acked-by: Evgeniy Polyakov
    Signed-off-by: David S. Miller

    Frederic Weisbecker
     

16 Jan, 2009

1 commit

31 Jul, 2008

1 commit

27 Feb, 2008

1 commit

29 Jan, 2008

2 commits

  • 6e32814bc   [CONNECTOR]: Cleanup struct cn_callback_entry ... Browse Code »

    - 'cb' is a fake struct member. In a previous patch struct cn_callback
    was renamed to cn_callback_id, so 'cb' should have been deleted at that
    time.

    - 'nls' isn't used and is redundant, we can retrieve this data through
    cn_callback_entry.pdev->nls.

    - 'seq' and 'group' should be u32, as they are declared to be u32 in
    other places.

    Signed-off-by: Li Zefan
    Signed-off-by: David S. Miller

    Li Zefan
     
  • 96a899655   [CONNECTOR]: Cleanup struct cn_queue_dev ... Browse Code »

    Struct member netlink_groups is never used, and I don't see how it can
    be useful.

    Signed-off-by: Li Zefan
    Signed-off-by: David S. Miller

    Li Zefan
     

17 Oct, 2007

2 commits

11 Oct, 2007

1 commit

  • cd40b7d39   [NET]: make netlink user -> kernel interface synchronious ... Browse Code »

    This patch make processing netlink user -> kernel messages synchronious.
    This change was inspired by the talk with Alexey Kuznetsov about current
    netlink messages processing. He says that he was badly wrong when introduced
    asynchronious user -> kernel communication.

    The call netlink_unicast is the only path to send message to the kernel
    netlink socket. But, unfortunately, it is also used to send data to the
    user.

    Before this change the user message has been attached to the socket queue
    and sk->sk_data_ready was called. The process has been blocked until all
    pending messages were processed. The bad thing is that this processing
    may occur in the arbitrary process context.

    This patch changes nlk->data_ready callback to get 1 skb and force packet
    processing right in the netlink_unicast.

    Kernel -> user path in netlink_unicast remains untouched.

    EINTR processing for in netlink_run_queue was changed. It forces rtnl_lock
    drop, but the process remains in the cycle until the message will be fully
    processed. So, there is no need to use this kludges now.

    Signed-off-by: Denis V. Lunev
    Acked-by: Alexey Kuznetsov
    Signed-off-by: David S. Miller

    Denis V. Lunev
     

18 Dec, 2006

1 commit

22 Nov, 2006

1 commit

23 Jun, 2006

1 commit

11 Nov, 2005

1 commit

07 Nov, 2005

1 commit

  • 9f46080c4   [PATCH] Process Events Connector ... Browse Code »

    This patch adds a connector that reports fork, exec, id change, and exit
    events for all processes to userspace. It replaces the fork_advisor patch
    that ELSA is currently using. Applications that may find these events
    useful include accounting/auditing (e.g. ELSA), system activity monitoring
    (e.g. top), security, and resource management (e.g. CKRM).

    Signed-off-by: Matt Helsley
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Matt Helsley
     

09 Oct, 2005

1 commit

  • dd0fc66fb   [PATCH] gfp flags annotations - part 1 ... Browse Code »

    - added typedef unsigned int __nocast gfp_t;

    - replaced __nocast uses for gfp flags with gfp_t - it gives exactly
    the same warnings as far as sparse is concerned, doesn't change
    generated code (from gcc point of view we replaced unsigned int with
    typedef) and documents what's going on far better.

    Signed-off-by: Al Viro
    Signed-off-by: Linus Torvalds

    Al Viro
     

05 Oct, 2005

1 commit

  • 17b698856   [CONNECTOR]: fix sparse gfp nocast warnings ... Browse Code »

    Fix implicit nocast warnings in connector code:
    drivers/connector/connector.c:102:24: warning: implicit cast to nocast type
    drivers/connector/connector.c:114:45: warning: implicit cast to nocast type

    Signed-off-by: Randy Dunlap
    Signed-off-by: David S. Miller

    Randy Dunlap
     

27 Sep, 2005

1 commit

  • acd042bb2   [CONNECTOR]: async connector mode. ... Browse Code »

    If input message rate from userspace is too high, do not drop them,
    but try to deliver using work queue allocation.

    Failing there is some kind of congestion control.

    It also removes warn_on on this condition, which scares people.

    Signed-off-by: Evgeniy Polyakov
    Signed-off-by: David S. Miller

    Evgeniy Polyakov
     

12 Sep, 2005

1 commit

  • 7672d0b54   [NET]: Add netlink connector. ... Browse Code »

    Kernel connector - new userspace kernel space easy to use
    communication module which implements easy to use bidirectional
    message bus using netlink as it's backend. Connector was created to
    eliminate complex skb handling both in send and receive message bus
    direction.

    Connector driver adds possibility to connect various agents using as
    one of it's backends netlink based network. One must register
    callback and identifier. When driver receives special netlink message
    with appropriate identifier, appropriate callback will be called.

    From the userspace point of view it's quite straightforward:

    socket();
    bind();
    send();
    recv();

    But if kernelspace want to use full power of such connections, driver
    writer must create special sockets, must know about struct sk_buff
    handling... Connector allows any kernelspace agents to use netlink
    based networking for inter-process communication in a significantly
    easier way:

    int cn_add_callback(struct cb_id *id, char *name, void (*callback) (void *));
    void cn_netlink_send(struct cn_msg *msg, u32 __groups, int gfp_mask);

    struct cb_id
    {
    __u32 idx;
    __u32 val;
    };

    idx and val are unique identifiers which must be registered in
    connector.h for in-kernel usage. void (*callback) (void *) - is a
    callback function which will be called when message with above idx.val
    will be received by connector core.

    Using connector completely hides low-level transport layer from it's
    users.

    Connector uses new netlink ability to have many groups in one socket.

    [ Incorporating many cleanups and fixes by myself and
    Andrew Morton -DaveM ]

    Signed-off-by: Evgeniy Polyakov
    Signed-off-by: Andrew Morton
    Signed-off-by: David S. Miller

    Evgeniy Polyakov