Release 4.7 include/linux/crash_dump.h
#ifndef LINUX_CRASH_DUMP_H
#define LINUX_CRASH_DUMP_H
#ifdef CONFIG_CRASH_DUMP
#include <linux/kexec.h>
#include <linux/proc_fs.h>
#include <linux/elf.h>
#include <asm/pgtable.h> /* for pgprot_t */
#define ELFCORE_ADDR_MAX (-1ULL)
#define ELFCORE_ADDR_ERR (-2ULL)
extern unsigned long long elfcorehdr_addr;
extern unsigned long long elfcorehdr_size;
extern int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size);
extern void elfcorehdr_free(unsigned long long addr);
extern ssize_t elfcorehdr_read(char *buf, size_t count, u64 *ppos);
extern ssize_t elfcorehdr_read_notes(char *buf, size_t count, u64 *ppos);
extern int remap_oldmem_pfn_range(struct vm_area_struct *vma,
unsigned long from, unsigned long pfn,
unsigned long size, pgprot_t prot);
extern ssize_t copy_oldmem_page(unsigned long, char *, size_t,
unsigned long, int);
void vmcore_cleanup(void);
/* Architecture code defines this if there are other possible ELF
* machine types, e.g. on bi-arch capable hardware. */
#ifndef vmcore_elf_check_arch_cross
#define vmcore_elf_check_arch_cross(x) 0
#endif
/*
* Architecture code can redefine this if there are any special checks
* needed for 32-bit ELF or 64-bit ELF vmcores. In case of 32-bit
* only architecture, vmcore_elf64_check_arch can be set to zero.
*/
#ifndef vmcore_elf32_check_arch
#define vmcore_elf32_check_arch(x) elf_check_arch(x)
#endif
#ifndef vmcore_elf64_check_arch
#define vmcore_elf64_check_arch(x) (elf_check_arch(x) || vmcore_elf_check_arch_cross(x))
#endif
/*
* is_kdump_kernel() checks whether this kernel is booting after a panic of
* previous kernel or not. This is determined by checking if previous kernel
* has passed the elf core header address on command line.
*
* This is not just a test if CONFIG_CRASH_DUMP is enabled or not. It will
* return 1 if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic of
* previous kernel.
*/
static inline int is_kdump_kernel(void)
{
return (elfcorehdr_addr != ELFCORE_ADDR_MAX) ? 1 : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chandru | chandru | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
/* is_vmcore_usable() checks if the kernel is booting after a panic and
* the vmcore region is usable.
*
* This makes use of the fact that due to alignment -2ULL is not
* a valid pointer, much in the vain of IS_ERR(), except
* dealing directly with an unsigned long long rather than a pointer.
*/
static inline int is_vmcore_usable(void)
{
return is_kdump_kernel() && elfcorehdr_addr != ELFCORE_ADDR_ERR ? 1 : 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| simon horman | simon horman | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
/* vmcore_unusable() marks the vmcore as unusable,
* without disturbing the logic of is_kdump_kernel()
*/
static inline void vmcore_unusable(void)
{
if (is_kdump_kernel())
elfcorehdr_addr = ELFCORE_ADDR_ERR;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| simon horman | simon horman | 18 | 100.00% | 1 | 100.00% |
| Total | 18 | 100.00% | 1 | 100.00% |
#define HAVE_OLDMEM_PFN_IS_RAM 1
extern int register_oldmem_pfn_is_ram(int (*fn)(unsigned long pfn));
extern void unregister_oldmem_pfn_is_ram(void);
#else /* !CONFIG_CRASH_DUMP */
static inline int is_kdump_kernel(void) { return 0; }
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chandru | chandru | 12 | 100.00% | 1 | 100.00% |
| Total | 12 | 100.00% | 1 | 100.00% |
#endif /* CONFIG_CRASH_DUMP */
extern unsigned long saved_max_pfn;
#endif /* LINUX_CRASHDUMP_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| michael holzheu | michael holzheu | 90 | 29.70% | 3 | 18.75% |
| vivek goyal | vivek goyal | 50 | 16.50% | 4 | 25.00% |
| simon horman | simon horman | 45 | 14.85% | 1 | 6.25% |
| chandru | chandru | 40 | 13.20% | 1 | 6.25% |
| olaf hering | olaf hering | 27 | 8.91% | 1 | 6.25% |
| ian campbell | ian campbell | 19 | 6.27% | 1 | 6.25% |
| daniel wagner | daniel wagner | 13 | 4.29% | 1 | 6.25% |
| rashika kheria | rashika kheria | 6 | 1.98% | 1 | 6.25% |
| mika westerberg | mika westerberg | 6 | 1.98% | 1 | 6.25% |
| qais yousef | qais yousef | 4 | 1.32% | 1 | 6.25% |
| fabio estevam | fabio estevam | 3 | 0.99% | 1 | 6.25% |
| Total | 303 | 100.00% | 16 | 100.00% |
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