Attachment 193721 Details for Bug 253850 – backport of vmcore elf notes patch

[patch] backport of vmcore elf notes patch

linux-kernel-test.patch (text/plain), 12.77 KB, created by Neil Horman on 2007-09-12 18:14:59 UTC

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Creator: Neil Horman

Created: 2007-09-12 18:14:59 UTC

Size: 12.77 KB

patch

obsolete

>--- linux-2.6.18.noarch/kernel/kexec.c.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/kernel/kexec.c	2007-09-12 08:37:38.000000000 -0400
>@@ -20,16 +20,29 @@
> #include <linux/syscalls.h>
> #include <linux/ioport.h>
> #include <linux/hardirq.h>
>+#include <linux/elf.h>
>+#include <linux/elfcore.h>
>+#include <linux/utsrelease.h>
>+#include <linux/utsname.h>
>+#include <linux/numa.h>
> 
> #include <asm/page.h>
> #include <asm/uaccess.h>
> #include <asm/io.h>
> #include <asm/system.h>
> #include <asm/semaphore.h>
>+#include <asm/sections.h>
> 
> /* Per cpu memory for storing cpu states in case of system crash. */
> note_buf_t* crash_notes;
> 
>+/* vmcoreinfo stuff */
>+unsigned char vmcoreinfo_data[VMCOREINFO_BYTES];
>+u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
>+size_t vmcoreinfo_size;
>+size_t vmcoreinfo_max_size = sizeof(vmcoreinfo_data);
>+
>+
> /* Location of the reserved area for the crash kernel */
> struct resource crashk_res = {
> 	.name  = "Crash kernel",
>@@ -1106,6 +1119,7 @@
> 		if (kexec_crash_image) {
> 			struct pt_regs fixed_regs;
> 			crash_setup_regs(&fixed_regs, regs);
>+			crash_save_vmcoreinfo();
> 			machine_crash_shutdown(&fixed_regs);
> 			machine_kexec(kexec_crash_image);
> 		}
>@@ -1113,6 +1127,34 @@
> 	}
> }
> 
>+static u32 *append_elf_note(u32 *buf, char *name, unsigned type, void *data,
>+                            size_t data_len)
>+{
>+	struct elf_note note;
>+
>+	note.n_namesz = strlen(name) + 1;
>+	note.n_descsz = data_len;
>+	note.n_type   = type;
>+	memcpy(buf, &note, sizeof(note));
>+	buf += (sizeof(note) + 3)/4;
>+	memcpy(buf, name, note.n_namesz);
>+	buf += (note.n_namesz + 3)/4;
>+	memcpy(buf, data, note.n_descsz);
>+	buf += (note.n_descsz + 3)/4;
>+
>+	return buf;
>+}
>+
>+static void final_note(u32 *buf)
>+{
>+	struct elf_note note;
>+
>+	note.n_namesz = 0;
>+	note.n_descsz = 0;
>+	note.n_type   = 0;
>+	memcpy(buf, &note, sizeof(note));
>+}
>+
> static int __init crash_notes_memory_init(void)
> {
> 	/* Allocate memory for saving cpu registers. */
>@@ -1125,3 +1167,103 @@
> 	return 0;
> }
> module_init(crash_notes_memory_init)
>+
>+void crash_save_vmcoreinfo(void)
>+{
>+	u32 *buf;
>+
>+	if (!vmcoreinfo_size)
>+		return;
>+
>+	vmcoreinfo_append_str("CRASHTIME=%ld", get_seconds());
>+
>+	buf = (u32 *)vmcoreinfo_note;
>+
>+	buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data,
>+			      vmcoreinfo_size);
>+
>+	final_note(buf);
>+}
>+
>+void vmcoreinfo_append_str(const char *fmt, ...)
>+{
>+	va_list args;
>+	char buf[0x50];
>+	int r;
>+
>+	va_start(args, fmt);
>+	r = vsnprintf(buf, sizeof(buf), fmt, args);
>+	va_end(args);
>+
>+	if (r + vmcoreinfo_size > vmcoreinfo_max_size)
>+		r = vmcoreinfo_max_size - vmcoreinfo_size;
>+
>+	memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);
>+
>+	vmcoreinfo_size += r;
>+}
>+
>+/*
>+ * provide an empty default implementation here -- architecture
>+ * code may override this
>+ */
>+void __attribute__ ((weak)) arch_crash_save_vmcoreinfo(void)
>+{}
>+
>+unsigned long __attribute__ ((weak)) paddr_vmcoreinfo_note(void)
>+{
>+	return __pa((unsigned long)(char *)&vmcoreinfo_note);
>+}
>+
>+static int __init crash_save_vmcoreinfo_init(void)
>+{
>+	vmcoreinfo_append_str("OSRELEASE=%s\n", init_uts_ns.name.release);
>+	vmcoreinfo_append_str("PAGESIZE=%ld\n", PAGE_SIZE);
>+
>+	SYMBOL(init_uts_ns);
>+	SYMBOL(node_online_map);
>+	SYMBOL(swapper_pg_dir);
>+	SYMBOL(_stext);
>+
>+#ifndef CONFIG_NEED_MULTIPLE_NODES
>+	SYMBOL(mem_map);
>+	SYMBOL(contig_page_data);
>+#endif
>+#ifdef CONFIG_SPARSEMEM
>+	SYMBOL(mem_section);
>+	LENGTH(mem_section, NR_SECTION_ROOTS);
>+	SIZE(mem_section);
>+	OFFSET(mem_section, section_mem_map);
>+#endif
>+	SIZE(page);
>+	SIZE(pglist_data);
>+	SIZE(zone);
>+	SIZE(free_area);
>+	SIZE(list_head);
>+	TYPEDEF_SIZE(nodemask_t);
>+	OFFSET(page, flags);
>+	OFFSET(page, _count);
>+	OFFSET(page, mapping);
>+	OFFSET(page, lru);
>+	OFFSET(pglist_data, node_zones);
>+	OFFSET(pglist_data, nr_zones);
>+#ifdef CONFIG_FLAT_NODE_MEM_MAP
>+	OFFSET(pglist_data, node_mem_map);
>+#endif
>+	OFFSET(pglist_data, node_start_pfn);
>+	OFFSET(pglist_data, node_spanned_pages);
>+	OFFSET(pglist_data, node_id);
>+	OFFSET(zone, free_area);
>+	OFFSET(zone, vm_stat);
>+	OFFSET(zone, spanned_pages);
>+	OFFSET(free_area, free_list);
>+	OFFSET(list_head, next);
>+	OFFSET(list_head, prev);
>+	LENGTH(zone.free_area, MAX_ORDER);
>+
>+	arch_crash_save_vmcoreinfo();
>+
>+	return 0;
>+}
>+
>+module_init(crash_save_vmcoreinfo_init)
>--- linux-2.6.18.noarch/kernel/ksysfs.c.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/kernel/ksysfs.c	2007-09-12 08:33:41.000000000 -0400
>@@ -60,6 +60,15 @@
> 	return sprintf(page, "%d\n", !!kexec_crash_image);
> }
> KERNEL_ATTR_RO(kexec_crash_loaded);
>+
>+static ssize_t vmcoreinfo_show(struct kset *kset, char *page)
>+{
>+	return sprintf(page, "%lx %x\n",
>+		       paddr_vmcoreinfo_note(),
>+		       (unsigned int)vmcoreinfo_max_size);
>+}
>+KERNEL_ATTR_RO(vmcoreinfo);
>+
> #endif /* CONFIG_KEXEC */
> 
> decl_subsys(kernel, NULL, NULL);
>@@ -73,6 +82,7 @@
> #ifdef CONFIG_KEXEC
> 	&kexec_loaded_attr.attr,
> 	&kexec_crash_loaded_attr.attr,
>+	&vmcoreinfo_attr.attr,
> #endif
> 	NULL
> };
>--- linux-2.6.18.noarch/init/version.c.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/init/version.c	2007-09-12 08:31:28.000000000 -0400
>@@ -29,6 +29,22 @@
> 
> EXPORT_SYMBOL(system_utsname);
> 
>+struct uts_namespace init_uts_ns = {
>+        .kref = {
>+                .refcount       = ATOMIC_INIT(2),
>+        },
>+        .name = {
>+                .sysname        = UTS_SYSNAME,
>+                .nodename       = UTS_NODENAME,
>+                .release        = UTS_RELEASE,
>+                .version        = UTS_VERSION,
>+                .machine        = UTS_MACHINE,
>+                .domainname     = UTS_DOMAINNAME,
>+        },
>+};
>+
>+EXPORT_SYMBOL_GPL(init_uts_ns);
>+
> const char linux_banner[] =
> 	"Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"
> 	LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n";
>--- linux-2.6.18.noarch/arch/i386/kernel/machine_kexec.c.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/arch/i386/kernel/machine_kexec.c	2007-09-12 08:31:28.000000000 -0400
>@@ -92,6 +92,18 @@
> {
> }
> 
>+ 
>+void arch_crash_save_vmcoreinfo(void)
>+{
>+#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
>+	SYMBOL(node_data);
>+	LENGTH(node_data, MAX_NUMNODES);
>+#endif
>+#ifdef CONFIG_X86_PAE
>+	CONFIG(X86_PAE);
>+#endif
>+}
>+
> #ifndef CONFIG_XEN
> /*
>  * Do not allocate memory (or fail in any way) in machine_kexec().
>--- linux-2.6.18.noarch/arch/x86_64/kernel/machine_kexec.c.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/arch/x86_64/kernel/machine_kexec.c	2007-09-12 08:31:28.000000000 -0400
>@@ -10,6 +10,7 @@
> #include <linux/kexec.h>
> #include <linux/string.h>
> #include <linux/reboot.h>
>+#include <linux/numa.h>
> #include <asm/pgtable.h>
> #include <asm/tlbflush.h>
> #include <asm/mmu_context.h>
>@@ -237,6 +238,14 @@
> 	return;
> }
> 
>+void arch_crash_save_vmcoreinfo(void)
>+{
>+#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
>+	SYMBOL(node_data);
>+	LENGTH(node_data, MAX_NUMNODES);
>+#endif
>+}
>+
> #ifndef CONFIG_XEN
> /*
>  * Do not allocate memory (or fail in any way) in machine_kexec().
>--- linux-2.6.18.noarch/arch/ia64/kernel/machine_kexec.c.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/arch/ia64/kernel/machine_kexec.c	2007-09-12 08:40:07.000000000 -0400
>@@ -19,6 +19,9 @@
> #include <asm/delay.h>
> #include <asm/meminit.h>
> #include <asm/machvec.h>
>+#include <asm/processor.h>
>+#include <linux/numa.h>
>+#include <linux/mmzone.h>
> 
> typedef void (*relocate_new_kernel_t)(unsigned long, unsigned long,
> 		struct ia64_boot_param *, unsigned long);
>@@ -138,3 +141,28 @@
> 	unw_init_running(ia64_machine_kexec, image);
> 	for(;;);
> }
>+
>+void arch_crash_save_vmcoreinfo(void)
>+{
>+#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
>+	SYMBOL(pgdat_list);
>+	LENGTH(pgdat_list, MAX_NUMNODES);
>+
>+	SYMBOL(node_memblk);
>+	LENGTH(node_memblk, NR_NODE_MEMBLKS);
>+	SIZE(node_memblk_s);
>+	OFFSET(node_memblk_s, start_paddr);
>+	OFFSET(node_memblk_s, size);
>+#endif
>+#ifdef CONFIG_PGTABLE_3
>+	CONFIG(PGTABLE_3);
>+#elif  CONFIG_PGTABLE_4
>+	CONFIG(PGTABLE_4);
>+#endif
>+}
>+
>+unsigned long paddr_vmcoreinfo_note(void)
>+{
>+	return ia64_tpa((unsigned long)(char *)&vmcoreinfo_note);
>+}
>+
>--- linux-2.6.18.noarch/arch/ia64/mm/discontig.c.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/arch/ia64/mm/discontig.c	2007-09-12 08:31:28.000000000 -0400
>@@ -45,7 +45,7 @@
> static struct early_node_data mem_data[MAX_NUMNODES] __initdata;
> static nodemask_t memory_less_mask __initdata;
> 
>-static pg_data_t *pgdat_list[MAX_NUMNODES];
>+pg_data_t *pgdat_list[MAX_NUMNODES];
> 
> /*
>  * To prevent cache aliasing effects, align per-node structures so that they
>--- linux-2.6.18.noarch/include/asm-ia64/numa.h.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/include/asm-ia64/numa.h	2007-09-12 08:31:28.000000000 -0400
>@@ -24,6 +24,7 @@
> 
> extern u16 cpu_to_node_map[NR_CPUS] __cacheline_aligned;
> extern cpumask_t node_to_cpu_mask[MAX_NUMNODES] __cacheline_aligned;
>+extern pg_data_t *pgdat_list[MAX_NUMNODES];
> 
> /* Stuff below this line could be architecture independent */
> 
>--- linux-2.6.18.noarch/include/linux/kexec.h.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/include/linux/kexec.h	2007-09-12 08:39:09.000000000 -0400
>@@ -10,6 +10,8 @@
> #endif
> #include <linux/ioport.h>
> #include <asm/kexec.h>
>+#include <linux/elf.h>
>+#include <linux/elfnote.h>
> 
> /* Verify architecture specific macros are defined */
> 
>@@ -33,6 +35,8 @@
> #error KEXEC_ARCH not defined
> #endif
> 
>+#define KEXEC_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
>+
> #ifndef KEXEC_ARCH_HAS_PAGE_MACROS
> #define kexec_page_to_pfn(page)  page_to_pfn(page)
> #define kexec_pfn_to_page(pfn)   pfn_to_page(pfn)
>@@ -120,6 +124,32 @@
> 						unsigned int order);
> extern void crash_kexec(struct pt_regs *);
> int kexec_should_crash(struct task_struct *);
>+void crash_save_vmcoreinfo(void);
>+void arch_crash_save_vmcoreinfo(void);
>+void vmcoreinfo_append_str(const char *fmt, ...)
>+	__attribute__ ((format (printf, 1, 2)));
>+unsigned long paddr_vmcoreinfo_note(void);
>+
>+#define SYMBOL(name) \
>+	vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
>+#define SIZE(name) \
>+	vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
>+			     (unsigned long)sizeof(struct name))
>+#define TYPEDEF_SIZE(name) \
>+	vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
>+			     (unsigned long)sizeof(name))
>+
>+#define OFFSET(name, field) \
>+	vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
>+			     (unsigned long)&(((struct name *)0)->field))
>+#define LENGTH(name, value) \
>+	vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
>+#define NUMBER(name) \
>+	vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
>+#define CONFIG(name) \
>+	vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
>+
>+
> extern struct kimage *kexec_image;
> extern struct kimage *kexec_crash_image;
> 
>@@ -144,12 +174,24 @@
> 
> #define KEXEC_FLAGS    (KEXEC_ON_CRASH)  /* List of defined/legal kexec flags */
> 
>+#define VMCOREINFO_BYTES           (4096)
>+#define VMCOREINFO_NOTE_NAME       "VMCOREINFO"
>+#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
>+#define VMCOREINFO_NOTE_SIZE       (KEXEC_NOTE_HEAD_BYTES*2 + VMCOREINFO_BYTES \
>+					+ VMCOREINFO_NOTE_NAME_BYTES)
>+
>+
>+
> /* Location of a reserved region to hold the crash kernel.
>  */
> extern struct resource crashk_res;
> typedef u32 note_buf_t[MAX_NOTE_BYTES/4];
> extern note_buf_t *crash_notes;
> 
>+extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
>+extern size_t vmcoreinfo_size;
>+extern size_t vmcoreinfo_max_size;
>+
> #else /* !CONFIG_KEXEC */
> struct pt_regs;
> struct task_struct;
>--- linux-2.6.18.noarch/include/linux/utsname.h.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/include/linux/utsname.h	2007-09-12 08:31:28.000000000 -0400
>@@ -1,6 +1,8 @@
> #ifndef _LINUX_UTSNAME_H
> #define _LINUX_UTSNAME_H
> 
>+#include <linux/kref.h>
>+
> #define __OLD_UTS_LEN 8
> 
> struct oldold_utsname {
>@@ -30,7 +32,13 @@
> 	char domainname[65];
> };
> 
>+struct uts_namespace {
>+	struct kref kref;
>+	struct new_utsname name;
>+};
>+
> extern struct new_utsname system_utsname;
>+extern struct uts_namespace init_uts_ns;
> 
> extern struct rw_semaphore uts_sem;
> 
>--- linux-2.6.18.noarch/include/asm-x86_64/pgtable.h.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/include/asm-x86_64/pgtable.h	2007-09-12 08:31:28.000000000 -0400
>@@ -21,7 +21,7 @@
> extern pgd_t init_level4_pgt[];
> extern unsigned long __supported_pte_mask;
> 
>-#define swapper_pg_dir ((pgd_t *)NULL)
>+#define swapper_pg_dir init_level4_pgt
> 
> extern void nonx_setup(const char *str);
> extern void paging_init(void);
>--- linux-2.6.18.noarch/include/asm-x86_64/mach-xen/asm/pgtable.h.orig	2007-09-12 08:40:41.000000000 -0400
>+++ linux-2.6.18.noarch/include/asm-x86_64/mach-xen/asm/pgtable.h	2007-09-12 08:31:28.000000000 -0400
>@@ -43,7 +43,7 @@
> extern pgd_t init_level4_pgt[];
> extern unsigned long __supported_pte_mask;
> 
>-#define swapper_pg_dir ((pgd_t *)NULL)
>+#define swapper_pg_dir init_level4_pgt
> 
> extern void nonx_setup(char *str);
> extern void paging_init(void);

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Attachments on bug 253850: 187591 | 193721 | 198621