-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define LNET_MINOR 240
-int libcfs_ioctl_getdata(char *buf, char *end, void *arg)
+int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
{
- struct libcfs_ioctl_hdr *hdr;
- struct libcfs_ioctl_data *data;
- int err;
- ENTRY;
-
- hdr = (struct libcfs_ioctl_hdr *)buf;
- data = (struct libcfs_ioctl_data *)buf;
+ ENTRY;
- err = copy_from_user(buf, (void *)arg, sizeof(*hdr));
- if (err)
- RETURN(err);
+ if (libcfs_ioctl_is_invalid(data)) {
+ CERROR("libcfs ioctl: parameter not correctly formatted\n");
+ RETURN(-EINVAL);
+ }
- if (hdr->ioc_version != LIBCFS_IOCTL_VERSION) {
- CERROR("PORTALS: version mismatch kernel vs application\n");
- RETURN(-EINVAL);
- }
+ if (data->ioc_inllen1 != 0)
+ data->ioc_inlbuf1 = &data->ioc_bulk[0];
- if (hdr->ioc_len + buf >= end) {
- CERROR("PORTALS: user buffer exceeds kernel buffer\n");
- RETURN(-EINVAL);
- }
+ if (data->ioc_inllen2 != 0)
+ data->ioc_inlbuf2 = &data->ioc_bulk[0] +
+ cfs_size_round(data->ioc_inllen1);
+ RETURN(0);
+}
- if (hdr->ioc_len < sizeof(struct libcfs_ioctl_data)) {
- CERROR("PORTALS: user buffer too small for ioctl\n");
- RETURN(-EINVAL);
- }
+int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
+ struct libcfs_ioctl_hdr __user *uhdr)
+{
+ struct libcfs_ioctl_hdr hdr;
+ int err = 0;
+ ENTRY;
+
+ if (copy_from_user(&hdr, uhdr, sizeof(hdr)))
+ RETURN(-EFAULT);
+
+ if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
+ hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
+ CERROR("libcfs ioctl: version mismatch expected %#x, got %#x\n",
+ LIBCFS_IOCTL_VERSION, hdr.ioc_version);
+ RETURN(-EINVAL);
+ }
- err = copy_from_user(buf, (void *)arg, hdr->ioc_len);
- if (err)
- RETURN(err);
+ if (hdr.ioc_len < sizeof(struct libcfs_ioctl_hdr)) {
+ CERROR("libcfs ioctl: user buffer too small for ioctl\n");
+ RETURN(-EINVAL);
+ }
- if (libcfs_ioctl_is_invalid(data)) {
- CERROR("PORTALS: ioctl not correctly formatted\n");
- RETURN(-EINVAL);
- }
+ if (hdr.ioc_len > LIBCFS_IOC_DATA_MAX) {
+ CERROR("libcfs ioctl: user buffer is too large %d/%d\n",
+ hdr.ioc_len, LIBCFS_IOC_DATA_MAX);
+ RETURN(-EINVAL);
+ }
- if (data->ioc_inllen1)
- data->ioc_inlbuf1 = &data->ioc_bulk[0];
+ LIBCFS_ALLOC(*hdr_pp, hdr.ioc_len);
+ if (*hdr_pp == NULL)
+ RETURN(-ENOMEM);
- if (data->ioc_inllen2)
- data->ioc_inlbuf2 = &data->ioc_bulk[0] +
- size_round(data->ioc_inllen1);
+ if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len))
+ GOTO(failed, err = -EFAULT);
- RETURN(0);
+ RETURN(0);
+failed:
+ LIBCFS_FREE(*hdr_pp, hdr.ioc_len);
+ RETURN(err);
}
-int libcfs_ioctl_popdata(void *arg, void *data, int size)
-{
- if (copy_to_user((char *)arg, data, size))
- return -EFAULT;
- return 0;
-}
-
-extern struct cfs_psdev_ops libcfs_psdev_ops;
-
static int
libcfs_psdev_open(struct inode * inode, struct file * file)
{
- struct libcfs_device_userstate **pdu = NULL;
- int rc = 0;
-
if (!inode)
- return (-EINVAL);
- pdu = (struct libcfs_device_userstate **)&file->private_data;
- if (libcfs_psdev_ops.p_open != NULL)
- rc = libcfs_psdev_ops.p_open(0, (void *)pdu);
- else
- return (-EPERM);
- return rc;
+ return -EINVAL;
+
+ try_module_get(THIS_MODULE);
+ return 0;
}
/* called when closing /dev/device */
static int
libcfs_psdev_release(struct inode * inode, struct file * file)
{
- struct libcfs_device_userstate *pdu;
- int rc = 0;
-
if (!inode)
- return (-EINVAL);
- pdu = file->private_data;
- if (libcfs_psdev_ops.p_close != NULL)
- rc = libcfs_psdev_ops.p_close(0, (void *)pdu);
- else
- rc = -EPERM;
- return rc;
+ return -EINVAL;
+
+ module_put(THIS_MODULE);
+ return 0;
}
-static int
-libcfs_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static long
+libcfs_psdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
- struct cfs_psdev_file pfile;
- int rc = 0;
-
- if (current->fsuid != 0)
+ if (!capable(CAP_SYS_ADMIN))
return -EACCES;
- if ( _IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
- _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
- _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR ) {
+ if (_IOC_TYPE(cmd) != IOC_LIBCFS_TYPE ||
+ _IOC_NR(cmd) < IOC_LIBCFS_MIN_NR ||
+ _IOC_NR(cmd) > IOC_LIBCFS_MAX_NR) {
CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
_IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
- return (-EINVAL);
- }
-
- /* Handle platform-dependent IOC requests */
- switch (cmd) {
- case IOC_LIBCFS_PANIC:
- if (!capable (CAP_SYS_BOOT))
- return (-EPERM);
- panic("debugctl-invoked panic");
- return (0);
- case IOC_LIBCFS_MEMHOG:
- if (!capable (CAP_SYS_ADMIN))
- return -EPERM;
- /* go thought */
+ return -EINVAL;
}
- pfile.off = 0;
- pfile.private_data = file->private_data;
- if (libcfs_psdev_ops.p_ioctl != NULL)
- rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void *)arg);
- else
- rc = -EPERM;
- return (rc);
+ return libcfs_ioctl(cmd, (void __user *)arg);
}
static struct file_operations libcfs_fops = {
- ioctl: libcfs_ioctl,
- open: libcfs_psdev_open,
- release: libcfs_psdev_release
+ .unlocked_ioctl = libcfs_psdev_ioctl,
+ .open = libcfs_psdev_open,
+ .release = libcfs_psdev_release
};
-cfs_psdev_t libcfs_dev = {
+struct miscdevice libcfs_dev = {
LNET_MINOR,
"lnet",
&libcfs_fops
git://git.whamcloud.com / fs / lustre-release.git / blobdiff