From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/arch/um/drivers/mconsole_kern.c | 46 +++++++++++++++++++++++++++++++++++-----------
1 files changed, 35 insertions(+), 11 deletions(-)
diff --git a/kernel/arch/um/drivers/mconsole_kern.c b/kernel/arch/um/drivers/mconsole_kern.c
index d5f9a2d..2d20773 100644
--- a/kernel/arch/um/drivers/mconsole_kern.c
+++ b/kernel/arch/um/drivers/mconsole_kern.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
* Copyright (C) 2001 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
*/
#include <linux/console.h>
@@ -35,6 +35,8 @@
#include "mconsole.h"
#include "mconsole_kern.h"
#include <os.h>
+
+static struct vfsmount *proc_mnt = NULL;
static int do_unlink_socket(struct notifier_block *notifier,
unsigned long what, void *data)
@@ -96,7 +98,6 @@
}
if (!list_empty(&mc_requests))
schedule_work(&mconsole_work);
- reactivate_fd(fd, MCONSOLE_IRQ);
return IRQ_HANDLED;
}
@@ -124,7 +125,7 @@
void mconsole_proc(struct mc_request *req)
{
- struct vfsmount *mnt = task_active_pid_ns(current)->proc_mnt;
+ struct vfsmount *mnt = proc_mnt;
char *buf;
int len;
struct file *file;
@@ -135,6 +136,10 @@
ptr += strlen("proc");
ptr = skip_spaces(ptr);
+ if (!mnt) {
+ mconsole_reply(req, "Proc not available", 1, 0);
+ goto out;
+ }
file = file_open_root(mnt->mnt_root, mnt, ptr, O_RDONLY, 0);
if (IS_ERR(file)) {
mconsole_reply(req, "Failed to open file", 1, 0);
@@ -218,7 +223,7 @@
void mconsole_stop(struct mc_request *req)
{
- deactivate_fd(req->originating_fd, MCONSOLE_IRQ);
+ block_signals();
os_set_fd_block(req->originating_fd, 1);
mconsole_reply(req, "stopped", 0, 0);
for (;;) {
@@ -240,8 +245,8 @@
(*req->cmd->handler)(req);
}
os_set_fd_block(req->originating_fd, 0);
- reactivate_fd(req->originating_fd, MCONSOLE_IRQ);
mconsole_reply(req, "", 0, 0);
+ unblock_signals();
}
static DEFINE_SPINLOCK(mc_devices_lock);
@@ -644,7 +649,7 @@
{
struct task_struct *task = arg;
- show_stack(task, NULL);
+ show_stack(task, NULL, KERN_INFO);
}
/*
@@ -685,6 +690,24 @@
with_console(req, stack_proc, to);
}
+static int __init mount_proc(void)
+{
+ struct file_system_type *proc_fs_type;
+ struct vfsmount *mnt;
+
+ proc_fs_type = get_fs_type("proc");
+ if (!proc_fs_type)
+ return -ENODEV;
+
+ mnt = kern_mount(proc_fs_type);
+ put_filesystem(proc_fs_type);
+ if (IS_ERR(mnt))
+ return PTR_ERR(mnt);
+
+ proc_mnt = mnt;
+ return 0;
+}
+
/*
* Changed by mconsole_setup, which is __setup, and called before SMP is
* active.
@@ -697,6 +720,8 @@
long sock;
int err;
char file[UNIX_PATH_MAX];
+
+ mount_proc();
if (umid_file_name("mconsole", file, sizeof(file)))
return -1;
@@ -754,10 +779,9 @@
return count;
}
-static const struct file_operations mconsole_proc_fops = {
- .owner = THIS_MODULE,
- .write = mconsole_proc_write,
- .llseek = noop_llseek,
+static const struct proc_ops mconsole_proc_ops = {
+ .proc_write = mconsole_proc_write,
+ .proc_lseek = noop_llseek,
};
static int create_proc_mconsole(void)
@@ -767,7 +791,7 @@
if (notify_socket == NULL)
return 0;
- ent = proc_create("mconsole", 0200, NULL, &mconsole_proc_fops);
+ ent = proc_create("mconsole", 0200, NULL, &mconsole_proc_ops);
if (ent == NULL) {
printk(KERN_INFO "create_proc_mconsole : proc_create failed\n");
return 0;
--
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