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    Subject[PATCH RFC] [8/9] Put UDP exports into a namespace
    Date

    The UDP exports are only used by UDPv6 and UDP lite. They are internal functions
    not supposed to be used by anybody else. So turn them into a name space that
    only allows those.

    ---
    net/ipv4/udp.c | 27 +++++++++++++++------------
    net/ipv4/udplite.c | 6 +++---
    2 files changed, 18 insertions(+), 15 deletions(-)

    Index: linux/net/ipv4/udp.c
    ===================================================================
    --- linux.orig/net/ipv4/udp.c
    +++ linux/net/ipv4/udp.c
    @@ -105,6 +105,9 @@
    #include <net/xfrm.h>
    #include "udp_impl.h"

    +MODULE_NAMESPACE_ALLOW(udp, udplite);
    +MODULE_NAMESPACE_ALLOW(udp, ipv6);
    +
    /*
    * Snmp MIB for the UDP layer
    */
    @@ -1641,18 +1644,18 @@ void udp4_proc_exit(void)
    }
    #endif /* CONFIG_PROC_FS */

    -EXPORT_SYMBOL(udp_disconnect);
    -EXPORT_SYMBOL(udp_hash);
    -EXPORT_SYMBOL(udp_hash_lock);
    -EXPORT_SYMBOL(udp_ioctl);
    -EXPORT_SYMBOL(udp_get_port);
    -EXPORT_SYMBOL(udp_prot);
    -EXPORT_SYMBOL(udp_sendmsg);
    -EXPORT_SYMBOL(udp_lib_getsockopt);
    -EXPORT_SYMBOL(udp_lib_setsockopt);
    -EXPORT_SYMBOL(udp_poll);
    +EXPORT_SYMBOL_NS(udp, udp_disconnect);
    +EXPORT_SYMBOL_NS(udp, udp_hash);
    +EXPORT_SYMBOL_NS(udp, udp_hash_lock);
    +EXPORT_SYMBOL_NS(udp, udp_ioctl);
    +EXPORT_SYMBOL_NS(udp, udp_get_port);
    +EXPORT_SYMBOL_NS(udp, udp_prot);
    +EXPORT_SYMBOL_NS(udp, udp_sendmsg);
    +EXPORT_SYMBOL_NS(udp, udp_lib_getsockopt);
    +EXPORT_SYMBOL_NS(udp, udp_lib_setsockopt);
    +EXPORT_SYMBOL_NS(udp, udp_poll);

    #ifdef CONFIG_PROC_FS
    -EXPORT_SYMBOL(udp_proc_register);
    -EXPORT_SYMBOL(udp_proc_unregister);
    +EXPORT_SYMBOL_NS(udp, udp_proc_register);
    +EXPORT_SYMBOL_NS(udp, udp_proc_unregister);
    #endif
    Index: linux/net/ipv4/udplite.c
    ===================================================================
    --- linux.orig/net/ipv4/udplite.c
    +++ linux/net/ipv4/udplite.c
    @@ -113,6 +113,6 @@ out_register_err:
    printk(KERN_CRIT "%s: Cannot add UDP-Lite protocol.\n", __FUNCTION__);
    }

    -EXPORT_SYMBOL(udplite_hash);
    -EXPORT_SYMBOL(udplite_prot);
    -EXPORT_SYMBOL(udplite_get_port);
    +EXPORT_SYMBOL_NS(udp, udplite_hash);
    +EXPORT_SYMBOL_NS(udp, udplite_prot);
    +EXPORT_SYMBOL_NS(udp, udplite_get_port);
    -
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