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    Subject[PATCH 6.0 842/862] io_uring/net: refactor io_sr_msg types
    Date
    From: Pavel Begunkov <asml.silence@gmail.com>

    [ upstream commit 0b048557db761d287777360a100e1d010760d209 ]

    In preparation for using struct io_sr_msg for zerocopy sends, clean up
    types. First, flags can be u16 as it's provided by the userspace in u16
    ioprio, as well as addr_len. This saves us 4 bytes. Also use unsigned
    for size and done_io, both are as well limited to u32.

    Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
    Link: https://lore.kernel.org/r/42c2639d6385b8b2181342d2af3a42d3b1c5bcd2.1662639236.git.asml.silence@gmail.com
    Signed-off-by: Jens Axboe <axboe@kernel.dk>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    io_uring/net.c | 14 +++++++-------
    1 file changed, 7 insertions(+), 7 deletions(-)

    --- a/io_uring/net.c
    +++ b/io_uring/net.c
    @@ -56,21 +56,21 @@ struct io_sr_msg {
    struct user_msghdr __user *umsg;
    void __user *buf;
    };
    + unsigned len;
    + unsigned done_io;
    unsigned msg_flags;
    - unsigned flags;
    - size_t len;
    - size_t done_io;
    + u16 flags;
    };

    struct io_sendzc {
    struct file *file;
    void __user *buf;
    - size_t len;
    + unsigned len;
    + unsigned done_io;
    unsigned msg_flags;
    - unsigned flags;
    - unsigned addr_len;
    + u16 flags;
    + u16 addr_len;
    void __user *addr;
    - size_t done_io;
    struct io_kiocb *notif;
    };


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