From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/fs/proc/vmcore.c | 48 ++++++++++++++++++++++++++++++++++--------------
1 files changed, 34 insertions(+), 14 deletions(-)
diff --git a/kernel/fs/proc/vmcore.c b/kernel/fs/proc/vmcore.c
index f5dfedc..0e4278d 100644
--- a/kernel/fs/proc/vmcore.c
+++ b/kernel/fs/proc/vmcore.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* fs/proc/vmcore.c Interface for accessing the crash
* dump from the system's previous life.
@@ -16,14 +17,16 @@
#include <linux/slab.h>
#include <linux/highmem.h>
#include <linux/printk.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/init.h>
#include <linux/crash_dump.h>
#include <linux/list.h>
+#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <linux/vmalloc.h>
#include <linux/pagemap.h>
#include <linux/uaccess.h>
+#include <linux/mem_encrypt.h>
#include <asm/io.h>
#include "internal.h"
@@ -51,6 +54,9 @@
/* Device Dump list and mutex to synchronize access to list */
static LIST_HEAD(vmcoredd_list);
static DEFINE_MUTEX(vmcoredd_mutex);
+
+static bool vmcoredd_disabled;
+core_param(novmcoredd, vmcoredd_disabled, bool, 0);
#endif /* CONFIG_PROC_VMCORE_DEVICE_DUMP */
/* Device Dump Size */
@@ -97,8 +103,9 @@
}
/* Reads a page from the oldmem device from given offset. */
-static ssize_t read_from_oldmem(char *buf, size_t count,
- u64 *ppos, int userbuf)
+ssize_t read_from_oldmem(char *buf, size_t count,
+ u64 *ppos, int userbuf,
+ bool encrypted)
{
unsigned long pfn, offset;
size_t nr_bytes;
@@ -124,8 +131,14 @@
else if (clear_user(buf, nr_bytes))
tmp = -EFAULT;
} else {
- tmp = copy_oldmem_page(pfn, buf, nr_bytes,
- offset, userbuf);
+ if (encrypted)
+ tmp = copy_oldmem_page_encrypted(pfn, buf,
+ nr_bytes,
+ offset,
+ userbuf);
+ else
+ tmp = copy_oldmem_page(pfn, buf, nr_bytes,
+ offset, userbuf);
}
if (tmp < 0)
return tmp;
@@ -160,7 +173,7 @@
*/
ssize_t __weak elfcorehdr_read(char *buf, size_t count, u64 *ppos)
{
- return read_from_oldmem(buf, count, ppos, 0);
+ return read_from_oldmem(buf, count, ppos, 0, false);
}
/*
@@ -168,7 +181,7 @@
*/
ssize_t __weak elfcorehdr_read_notes(char *buf, size_t count, u64 *ppos)
{
- return read_from_oldmem(buf, count, ppos, 0);
+ return read_from_oldmem(buf, count, ppos, 0, mem_encrypt_active());
}
/*
@@ -178,6 +191,7 @@
unsigned long from, unsigned long pfn,
unsigned long size, pgprot_t prot)
{
+ prot = pgprot_encrypted(prot);
return remap_pfn_range(vma, from, pfn, size, prot);
}
@@ -367,7 +381,8 @@
m->offset + m->size - *fpos,
buflen);
start = m->paddr + *fpos - m->offset;
- tmp = read_from_oldmem(buffer, tsz, &start, userbuf);
+ tmp = read_from_oldmem(buffer, tsz, &start,
+ userbuf, mem_encrypt_active());
if (tmp < 0)
return tmp;
buflen -= tsz;
@@ -417,7 +432,7 @@
if (rc < 0) {
unlock_page(page);
put_page(page);
- return (rc == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS;
+ return vmf_error(rc);
}
SetPageUptodate(page);
}
@@ -656,10 +671,10 @@
}
#endif
-static const struct file_operations proc_vmcore_operations = {
- .read = read_vmcore,
- .llseek = default_llseek,
- .mmap = mmap_vmcore,
+static const struct proc_ops vmcore_proc_ops = {
+ .proc_read = read_vmcore,
+ .proc_lseek = default_llseek,
+ .proc_mmap = mmap_vmcore,
};
static struct vmcore* __init get_new_element(void)
@@ -1445,6 +1460,11 @@
size_t data_size;
int ret;
+ if (vmcoredd_disabled) {
+ pr_err_once("Device dump is disabled\n");
+ return -EINVAL;
+ }
+
if (!data || !strlen(data->dump_name) ||
!data->vmcoredd_callback || !data->size)
return -EINVAL;
@@ -1539,7 +1559,7 @@
elfcorehdr_free(elfcorehdr_addr);
elfcorehdr_addr = ELFCORE_ADDR_ERR;
- proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &proc_vmcore_operations);
+ proc_vmcore = proc_create("vmcore", S_IRUSR, NULL, &vmcore_proc_ops);
if (proc_vmcore)
proc_vmcore->size = vmcore_size;
return 0;
--
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