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    Subject[PATCH 02/54] drbd: Add drbd_send_all(): Send an entire buffer
    Date
    From: Andreas Gruenbacher <agruen@linbit.com>

    Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
    Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
    ---
    drivers/block/drbd/drbd_int.h | 3 +++
    drivers/block/drbd/drbd_main.c | 18 ++++++++++++++++++
    2 files changed, 21 insertions(+), 0 deletions(-)

    diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
    index eaa1fd5..32799ea 100644
    --- a/drivers/block/drbd/drbd_int.h
    +++ b/drivers/block/drbd/drbd_int.h
    @@ -1161,6 +1161,9 @@ extern void _tl_add_barrier(struct drbd_tconn *, struct drbd_tl_epoch *);
    extern void drbd_free_sock(struct drbd_tconn *tconn);
    extern int drbd_send(struct drbd_tconn *tconn, struct socket *sock,
    void *buf, size_t size, unsigned msg_flags);
    +extern int drbd_send_all(struct drbd_tconn *, struct socket *, void *, size_t,
    + unsigned);
    +
    extern int drbd_send_protocol(struct drbd_tconn *tconn);
    extern int drbd_send_uuids(struct drbd_conf *mdev);
    extern int drbd_send_uuids_skip_initial_sync(struct drbd_conf *mdev);
    diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
    index 628005a..1381d01 100644
    --- a/drivers/block/drbd/drbd_main.c
    +++ b/drivers/block/drbd/drbd_main.c
    @@ -1764,6 +1764,24 @@ int drbd_send(struct drbd_tconn *tconn, struct socket *sock,
    return sent;
    }

    +/**
    + * drbd_send_all - Send an entire buffer
    + *
    + * Returns 0 upon success and a negative error value otherwise.
    + */
    +int drbd_send_all(struct drbd_tconn *tconn, struct socket *sock, void *buffer,
    + size_t size, unsigned msg_flags)
    +{
    + int err;
    +
    + err = drbd_send(tconn, sock, buffer, size, msg_flags);
    + if (err < 0)
    + return err;
    + if (err != size)
    + return -EIO;
    + return 0;
    +}
    +
    static int drbd_open(struct block_device *bdev, fmode_t mode)
    {
    struct drbd_conf *mdev = bdev->bd_disk->private_data;
    --
    1.7.4.1


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