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    Subject[PATCH v4 0/3] Make core_pattern support namespace
    Date
    This patchset includes following function points:
    1: Let usermodehelper function possible to set pid namespace
    done by: [PATCH v4 1/3] Make call_usermodehelper_exec possible
    to set pid namespace.
    2: Let pipe_type core_pattern write dump into container's rootfs
    done by: [PATCH v4 2/3] Limit dump_pipe program's permission to
    init for container.
    2: Make separate core_pattern setting for each container
    done by: [PATCH v4 3/3] Make core_pattern support namespace
    3: Compatibility with current system
    also included in: [PATCH v4 3/3] Make core_pattern support namespace
    If container hadn't change core_pattern setting, it will keep
    same setting with host.

    Test:
    1: Pass a test script for each function of this patchset
    ## TEST IN HOST ##
    [root@kerneldev dumptest]# ./test_host
    Set file core_pattern: OK
    ./test_host: line 41: 2366 Segmentation fault (core dumped) "$SCRI=
    PT_BASE_DIR"/make_dump
    Checking dumpfile: OK
    Set file core_pattern: OK
    ./test_host: line 41: 2369 Segmentation fault (core dumped) "$SCRI=
    PT_BASE_DIR"/make_dump
    Checking dump_pipe triggered: OK
    Checking rootfs: OK
    Checking dumpfile: OK
    Checking namespace: OK
    Checking process list: OK
    Checking capabilities: OK

    ## TEST IN GUEST ##
    # ./test
    Segmentation fault (core dumped)
    Checking dump_pipe triggered: OK
    Checking rootfs: OK
    Checking dumpfile: OK
    Checking namespace: OK
    Checking process list: OK
    Checking cg pids: OK
    Checking capabilities: OK
    [ 64.940734] make_dump[2432]: segfault at 0 ip 000000000040049d sp 000=
    07ffc4af025f0 error 6 in make_dump[400000+a6000]
    #
    2: Pass other test(which is not easy to do in script) by hand.

    Changelog v3.1-v4:
    1. remove extra fork pointed out by:
    Andrei Vagin <avagin@gmail.com>

    Changelog v3-v3.1:
    1. Switch "pwd" of pipe program to container's root fs.
    2. Rebase on top of v4.9-rc1

    Changelog v2->v3:
    1: Fix problem of setting pid namespace, pointed out by:
    Andrei Vagin <avagin@gmail.com>

    Changelog v1(RFC)->v2:
    1: Add [PATCH 2/2] which was todo in [RFC v1].
    2: Pass a test script for each function.
    3: Rebase on top of v4.7.

    Suggested-by: Eric W. Biederman <ebiederm@xmission.com>
    Suggested-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
    Signed-off-by: Cao Shufeng <caosf.fnst@cn.fujitsu.com>

    Cao Shufeng (2):
    Make call_usermodehelper_exec possible to set namespaces
    Limit dump_pipe program's permission to init for container

    Zhao Lei (1):
    Make core_pattern support namespace

    fs/coredump.c | 150 +++++++++++++++++++++++++++++++++++++++---
    include/linux/binfmts.h | 2 +
    include/linux/kmod.h | 4 ++
    include/linux/pid_namespace.h | 3 +
    init/do_mounts_initrd.c | 3 +-
    kernel/kmod.c | 43 +++++++++---
    kernel/pid.c | 2 +
    kernel/pid_namespace.c | 2 +
    kernel/sysctl.c | 50 ++++++++++++--
    lib/kobject_uevent.c | 3 +-
    security/keys/request_key.c | 4 +-
    11 files changed, 241 insertions(+), 25 deletions(-)

    --
    2.7.4



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