From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/coda/psdev.c | 39 +++++++++++++++++++++------------------
1 files changed, 21 insertions(+), 18 deletions(-)
diff --git a/kernel/fs/coda/psdev.c b/kernel/fs/coda/psdev.c
index 55824cb..897c7cb 100644
--- a/kernel/fs/coda/psdev.c
+++ b/kernel/fs/coda/psdev.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* An implementation of a loadable kernel mode driver providing
* multiple kernel/user space bidirectional communications links.
*
* Author: Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*
* Adapted to become the Linux 2.0 Coda pseudo device
* Peter Braam <braam@maths.ox.ac.uk>
@@ -39,12 +35,10 @@
#include <linux/device.h>
#include <linux/pid_namespace.h>
#include <asm/io.h>
-#include <linux/poll.h>
#include <linux/uaccess.h>
#include <linux/coda.h>
-#include <linux/coda_psdev.h>
-
+#include "coda_psdev.h"
#include "coda_linux.h"
#include "coda_int.h"
@@ -105,8 +99,12 @@
ssize_t retval = 0, count = 0;
int error;
+ /* make sure there is enough to copy out the (opcode, unique) values */
+ if (nbytes < (2 * sizeof(u_int32_t)))
+ return -EINVAL;
+
/* Peek at the opcode, uniquefier */
- if (copy_from_user(&hdr, buf, 2 * sizeof(u_long)))
+ if (copy_from_user(&hdr, buf, 2 * sizeof(u_int32_t)))
return -EFAULT;
if (DOWNCALL(hdr.opcode)) {
@@ -124,17 +122,21 @@
hdr.opcode, hdr.unique);
nbytes = size;
}
- CODA_ALLOC(dcbuf, union outputArgs *, nbytes);
+ dcbuf = kvmalloc(nbytes, GFP_KERNEL);
+ if (!dcbuf) {
+ retval = -ENOMEM;
+ goto out;
+ }
if (copy_from_user(dcbuf, buf, nbytes)) {
- CODA_FREE(dcbuf, nbytes);
+ kvfree(dcbuf);
retval = -EFAULT;
goto out;
}
/* what downcall errors does Venus handle ? */
- error = coda_downcall(vcp, hdr.opcode, dcbuf);
+ error = coda_downcall(vcp, hdr.opcode, dcbuf, nbytes);
- CODA_FREE(dcbuf, nbytes);
+ kvfree(dcbuf);
if (error) {
pr_warn("%s: coda_downcall error: %d\n",
__func__, error);
@@ -260,7 +262,7 @@
goto out;
}
- CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
+ kvfree(req->uc_data);
kfree(req);
out:
mutex_unlock(&vcp->vc_mutex);
@@ -322,7 +324,7 @@
/* Async requests need to be freed here */
if (req->uc_flags & CODA_REQ_ASYNC) {
- CODA_FREE(req->uc_data, sizeof(struct coda_in_hdr));
+ kvfree(req->uc_data);
kfree(req);
continue;
}
@@ -355,13 +357,13 @@
.llseek = noop_llseek,
};
-static int init_coda_psdev(void)
+static int __init init_coda_psdev(void)
{
int i, err = 0;
if (register_chrdev(CODA_PSDEV_MAJOR, "coda", &coda_psdev_fops)) {
pr_err("%s: unable to get major %d\n",
__func__, CODA_PSDEV_MAJOR);
- return -EIO;
+ return -EIO;
}
coda_psdev_class = class_create(THIS_MODULE, "coda");
if (IS_ERR(coda_psdev_class)) {
@@ -386,7 +388,8 @@
MODULE_DESCRIPTION("Coda Distributed File System VFS interface");
MODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR);
MODULE_LICENSE("GPL");
-MODULE_VERSION("6.6");
+MODULE_IMPORT_NS(ANDROID_GKI_VFS_EXPORT_ONLY);
+MODULE_VERSION("7.0");
static int __init init_coda(void)
{
--
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