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https://github.com/torvalds/linux
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a090931524
Read a record is cleared by others, but the deleted record cache entry is still created by erst_get_record_id_next. When next enumerate the records, get the cached deleted record, then erst_read() return -ENOENT and try to get next record, loop back to first ID will return 0 in function __erst_record_id_cache_add_one and then set record_id as APEI_ERST_INVALID_RECORD_ID, finished this time read operation. It will result in read the records just in the cache hereafter. This patch cleared the deleted record cache, fix the issue that "./erst-inject -p" shows record counts not equal to "./erst-inject -n". A reproducer of the problem(retry many times): [root@localhost erst-inject]# ./erst-inject -c 0xaaaaa00011 [root@localhost erst-inject]# ./erst-inject -p rc: 273 rcd sig: CPER rcd id: 0xaaaaa00012 rc: 273 rcd sig: CPER rcd id: 0xaaaaa00013 rc: 273 rcd sig: CPER rcd id: 0xaaaaa00014 [root@localhost erst-inject]# ./erst-inject -i 0xaaaaa000006 [root@localhost erst-inject]# ./erst-inject -i 0xaaaaa000007 [root@localhost erst-inject]# ./erst-inject -i 0xaaaaa000008 [root@localhost erst-inject]# ./erst-inject -p rc: 273 rcd sig: CPER rcd id: 0xaaaaa00012 rc: 273 rcd sig: CPER rcd id: 0xaaaaa00013 rc: 273 rcd sig: CPER rcd id: 0xaaaaa00014 [root@localhost erst-inject]# ./erst-inject -n total error record count: 6 Signed-off-by: Liu Xinpeng <liuxp11@chinatelecom.cn> Reviewed-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* apei.h - ACPI Platform Error Interface
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*/
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#ifndef ACPI_APEI_H
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#define ACPI_APEI_H
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#include <linux/acpi.h>
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#include <linux/cper.h>
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#include <asm/ioctls.h>
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#define APEI_ERST_INVALID_RECORD_ID 0xffffffffffffffffULL
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#define APEI_ERST_CLEAR_RECORD _IOW('E', 1, u64)
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#define APEI_ERST_GET_RECORD_COUNT _IOR('E', 2, u32)
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#ifdef __KERNEL__
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enum hest_status {
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HEST_ENABLED,
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HEST_DISABLED,
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HEST_NOT_FOUND,
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};
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extern int hest_disable;
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extern int erst_disable;
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#ifdef CONFIG_ACPI_APEI_GHES
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extern bool ghes_disable;
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void __init acpi_ghes_init(void);
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#else
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#define ghes_disable 1
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static inline void acpi_ghes_init(void) { }
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#endif
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#ifdef CONFIG_ACPI_APEI
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void __init acpi_hest_init(void);
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#else
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static inline void acpi_hest_init(void) { }
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#endif
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int erst_write(const struct cper_record_header *record);
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ssize_t erst_get_record_count(void);
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int erst_get_record_id_begin(int *pos);
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int erst_get_record_id_next(int *pos, u64 *record_id);
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void erst_get_record_id_end(void);
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ssize_t erst_read(u64 record_id, struct cper_record_header *record,
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size_t buflen);
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ssize_t erst_read_record(u64 record_id, struct cper_record_header *record,
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size_t buflen, size_t recordlen, const guid_t *creatorid);
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int erst_clear(u64 record_id);
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int arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr, void *data);
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void arch_apei_report_mem_error(int sev, struct cper_sec_mem_err *mem_err);
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#endif
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#endif
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