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https://github.com/ibm-s390-linux/s390-tools.git
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8c9cc6e12a
hsavmcore is designed to make the dump process with kdump more efficient. With hsavmcore, the HSA memory that contains a part of the production kernel's memory can be released early in the process. Depending on the size of the production kernel's memory, writing the dump to persistent storage can be time consuming and prevent the HSA memory from being reused by other LPARs. Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com> Reviewed-by: Philipp Rudo <prudo@linux.ibm.com> Acked-by: Jan Höppner <hoeppner@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
/*
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* Copyright IBM Corp. 2021
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include <stddef.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/mount.h>
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#include "lib/util_log.h"
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#include "mount.h"
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int mount_debugfs(const char *target)
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{
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int ret;
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util_log_print(UTIL_LOG_INFO, "Mount debugfs on %s\n", target);
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ret = mount("none", target, "debugfs", 0, NULL);
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if (ret) {
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util_log_print(UTIL_LOG_ERROR, "mount syscall failed (%s)\n",
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strerror(errno));
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return -1;
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}
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return 0;
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}
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int bind_mount(const char *src, const char *target)
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{
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int ret;
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util_log_print(UTIL_LOG_INFO, "Bind mount %s on %s\n", src, target);
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ret = mount(src, target, "", MS_BIND, NULL);
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if (ret) {
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util_log_print(UTIL_LOG_ERROR, "mount syscall failed (%s)\n",
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strerror(errno));
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return -1;
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}
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return 0;
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}
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int unmount_detach(const char *target)
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{
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int ret;
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util_log_print(UTIL_LOG_INFO, "Unmount detach %s\n", target);
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ret = umount2(target, MNT_DETACH);
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if (ret) {
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util_log_print(UTIL_LOG_ERROR, "umount2 syscall failed (%s)\n",
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strerror(errno));
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return -1;
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}
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return 0;
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}
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