-/* -*- 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.
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see [sun.com URL with a
- * copy of GPLv2].
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* 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)
+static inline size_t libcfs_ioctl_packlen(struct libcfs_ioctl_data *data)
+{
+ size_t len = sizeof(*data);
+
+ len += (data->ioc_inllen1 + 7) & ~7;
+ len += (data->ioc_inllen2 + 7) & ~7;
+ return len;
+}
+
+static bool libcfs_ioctl_is_invalid(struct libcfs_ioctl_data *data)
{
- struct libcfs_ioctl_hdr *hdr;
- struct libcfs_ioctl_data *data;
- int err;
- ENTRY;
+ if (data->ioc_hdr.ioc_len > BIT(30))
+ return true;
- hdr = (struct libcfs_ioctl_hdr *)buf;
- data = (struct libcfs_ioctl_data *)buf;
+ if (data->ioc_inllen1 > BIT(30))
+ return true;
- err = copy_from_user(buf, (void *)arg, sizeof(*hdr));
- if (err)
- RETURN(err);
+ if (data->ioc_inllen2 > BIT(30))
+ return true;
- if (hdr->ioc_version != LIBCFS_IOCTL_VERSION) {
- CERROR("PORTALS: version mismatch kernel vs application\n");
- RETURN(-EINVAL);
- }
+ if (data->ioc_inlbuf1 && !data->ioc_inllen1)
+ return true;
- if (hdr->ioc_len + buf >= end) {
- CERROR("PORTALS: user buffer exceeds kernel buffer\n");
- RETURN(-EINVAL);
- }
+ if (data->ioc_inlbuf2 && !data->ioc_inllen2)
+ return true;
+ if (data->ioc_pbuf1 && !data->ioc_plen1)
+ return true;
- if (hdr->ioc_len < sizeof(struct libcfs_ioctl_data)) {
- CERROR("PORTALS: user buffer too small for ioctl\n");
- RETURN(-EINVAL);
- }
+ if (data->ioc_pbuf2 && !data->ioc_plen2)
+ return true;
- err = copy_from_user(buf, (void *)arg, hdr->ioc_len);
- if (err)
- RETURN(err);
+ if (data->ioc_plen1 && !data->ioc_pbuf1)
+ return true;
- if (libcfs_ioctl_is_invalid(data)) {
- CERROR("PORTALS: ioctl not correctly formatted\n");
- RETURN(-EINVAL);
- }
+ if (data->ioc_plen2 && !data->ioc_pbuf2)
+ return true;
- if (data->ioc_inllen1)
- data->ioc_inlbuf1 = &data->ioc_bulk[0];
+ if (libcfs_ioctl_packlen(data) != data->ioc_hdr.ioc_len)
+ return true;
- if (data->ioc_inllen2)
- data->ioc_inlbuf2 = &data->ioc_bulk[0] +
- size_round(data->ioc_inllen1);
+ if (data->ioc_inllen1 &&
+ data->ioc_bulk[((data->ioc_inllen1 + 7) & ~7) +
+ data->ioc_inllen2 - 1] != '\0')
+ return true;
- RETURN(0);
+ return false;
}
-int libcfs_ioctl_popdata(void *arg, void *data, int size)
+int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
{
- if (copy_to_user((char *)arg, data, size))
- return -EFAULT;
- return 0;
-}
+ ENTRY;
-extern struct cfs_psdev_ops libcfs_psdev_ops;
+ if (libcfs_ioctl_is_invalid(data)) {
+ CERROR("libcfs ioctl: parameter not correctly formatted\n");
+ RETURN(-EINVAL);
+ }
-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;
+ if (data->ioc_inllen1 != 0)
+ data->ioc_inlbuf1 = &data->ioc_bulk[0];
+
+ if (data->ioc_inllen2 != 0)
+ data->ioc_inlbuf2 = &data->ioc_bulk[0] +
+ cfs_size_round(data->ioc_inllen1);
+
+ RETURN(0);
}
-/* called when closing /dev/device */
-static int
-libcfs_psdev_release(struct inode * inode, struct file * file)
+int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
+ struct libcfs_ioctl_hdr __user *uhdr)
{
- 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;
+ 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);
+ }
+
+ if (hdr.ioc_len < sizeof(struct libcfs_ioctl_hdr)) {
+ CERROR("libcfs ioctl: user buffer too small for ioctl\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);
+ }
+
+ LIBCFS_ALLOC(*hdr_pp, hdr.ioc_len);
+ if (*hdr_pp == NULL)
+ RETURN(-ENOMEM);
+
+ if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len))
+ GOTO(failed, err = -EFAULT);
+
+ RETURN(0);
+failed:
+ LIBCFS_FREE(*hdr_pp, hdr.ioc_len);
+ RETURN(err);
}
-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
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = libcfs_psdev_ioctl,
};
-cfs_psdev_t libcfs_dev = {
+struct miscdevice libcfs_dev = {
LNET_MINOR,
"lnet",
&libcfs_fops
};
-
-