From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kNZH4-0006ab-UC for kexec@lists.infradead.org; Wed, 30 Sep 2020 10:23:51 +0000 From: Alexander Egorenkov Subject: [PATCH v3 1/1] kdump: append uts_namespace.name offset to VMCOREINFO Date: Wed, 30 Sep 2020 12:23:28 +0200 Message-Id: <20200930102328.396488-1-egorenar@linux.ibm.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: dyoung@redhat.com, bhe@redhat.com, vgoyal@redhat.com, lijiang@redhat.com Cc: keescook@chromium.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, Alexander Egorenkov , ktkhai@virtuozzo.com, ebiederm@xmission.com, akpm@linux-foundation.org, christian.brauner@ubuntu.com The offset of the field 'init_uts_ns.name' has changed since commit 9a56493f6942 ("uts: Use generic ns_common::count"). Link: https://lore.kernel.org/r/159644978167.604812.1773586504374412107.stgit@localhost.localdomain Make the offset of the field 'uts_namespace.name' available in VMCOREINFO because tools like 'crash-utility' and 'makedumpfile' must be able to read it from crash dumps. Signed-off-by: Alexander Egorenkov --- v2 -> v3: * Added documentation to vmcoreinfo.rst * Use the short form of the commit reference v1 -> v2: * Improved commit message * Added link to the discussion of the uts namespace changes Documentation/admin-guide/kdump/vmcoreinfo.rst | 6 ++++++ kernel/crash_core.c | 1 + 2 files changed, 7 insertions(+) diff --git a/Documentation/admin-guide/kdump/vmcoreinfo.rst b/Documentation/admin-guide/kdump/vmcoreinfo.rst index e44a6c01f336..3861a25faae1 100644 --- a/Documentation/admin-guide/kdump/vmcoreinfo.rst +++ b/Documentation/admin-guide/kdump/vmcoreinfo.rst @@ -39,6 +39,12 @@ call. User-space tools can get the kernel name, host name, kernel release number, kernel version, architecture name and OS type from it. +(uts_namespace, name) +--------------------- + +Offset of the name's member. Crash Utility and Makedumpfile get +the start address of the init_uts_ns.name from this. + node_online_map --------------- diff --git a/kernel/crash_core.c b/kernel/crash_core.c index 106e4500fd53..173fdc261882 100644 --- a/kernel/crash_core.c +++ b/kernel/crash_core.c @@ -447,6 +447,7 @@ static int __init crash_save_vmcoreinfo_init(void) VMCOREINFO_PAGESIZE(PAGE_SIZE); VMCOREINFO_SYMBOL(init_uts_ns); + VMCOREINFO_OFFSET(uts_namespace, name); VMCOREINFO_SYMBOL(node_online_map); #ifdef CONFIG_MMU VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir); -- 2.26.2 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec