From ca4a9241cc5e718de86a34afd41972869546a5e3 Mon Sep 17 00:00:00 2001 From: Alexander Egorenkov Date: Tue, 15 Dec 2020 20:45:31 -0800 Subject: kdump: append uts_namespace.name offset to VMCOREINFO The offset of the field 'init_uts_ns.name' has changed since commit 9a56493f6942 ("uts: Use generic ns_common::count"). 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. Link: https://lore.kernel.org/r/159644978167.604812.1773586504374412107.stgit@localhost.localdomain Link: https://lkml.kernel.org/r/20200930102328.396488-1-egorenar@linux.ibm.com Signed-off-by: Alexander Egorenkov Acked-by: lijiang Acked-by: Baoquan He Cc: Dave Young Cc: Vivek Goyal Cc: "Eric W . Biederman" Cc: Kirill Tkhai Cc: Kees Cook Cc: Christian Brauner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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 4fcfe0b70c4e..825284baaf46 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); -- cgit v1.2.3