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Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/include/linux/crash_dump.h

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/* SPDX-License-Identifier: GPL-2.0 / #ifndef LINUX_CRASH_DUMP_H #define LINUX_CRASH_DUMP_H #include <linux/kexec.h> #include <linux/proc_fs.h> #include <linux/elf.h> #include <uapi/linux/vmcore.h> #include <asm/pgtable.h> / for pgprot_t / #ifdef CONFIG_CRASH_DUMP #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); extern ssize_t copy_oldmem_page_encrypted(unsigned long pfn, char buf, size_t csize, unsigned long offset, int userbuf); 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 true if CONFIG_CRASH_DUMP=y and if kernel is booting after a panic * of previous kernel. / static inline bool is_kdump_kernel(void) { return elfcorehdr_addr != ELFCORE_ADDR_MAX; } / 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; } / 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; } #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 bool is_kdump_kernel(void) { return 0; } #endif / CONFIG_CRASH_DUMP / extern unsigned long saved_max_pfn; / Device Dump information to be filled by drivers / struct vmcoredd_data { char dump_name[VMCOREDD_MAX_NAME_BYTES]; / Unique name of the dump / unsigned int size; / Size of the dump / / Driver's registered callback to be invoked to collect dump / int (vmcoredd_callback)(struct vmcoredd_data data, void buf); }; #ifdef CONFIG_PROC_VMCORE_DEVICE_DUMP int vmcore_add_device_dump(struct vmcoredd_data data); #else static inline int vmcore_add_device_dump(struct vmcoredd_data data) { return -EOPNOTSUPP; } #endif /* CONFIG_PROC_VMCORE_DEVICE_DUMP / #ifdef CONFIG_PROC_VMCORE ssize_t read_from_oldmem(char buf, size_t count, u64 ppos, int userbuf, bool encrypted); #else static inline ssize_t read_from_oldmem(char buf, size_t count, u64 ppos, int userbuf, bool encrypted) { return -EOPNOTSUPP; } #endif / CONFIG_PROC_VMCORE / #endif / LINUX_CRASHDUMP_H */

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