*
* You should have received a copy of the GNU General Public License
* 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
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_LNET
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/uaccess.h>
#include <libcfs/libcfs.h>
-#define LNET_MINOR 240
+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)
+{
+ if (data->ioc_hdr.ioc_len > BIT(30))
+ return true;
+
+ if (data->ioc_inllen1 > BIT(30))
+ return true;
+
+ if (data->ioc_inllen2 > BIT(30))
+ return true;
+
+ if (data->ioc_inlbuf1 && !data->ioc_inllen1)
+ return true;
+
+ if (data->ioc_inlbuf2 && !data->ioc_inllen2)
+ return true;
+
+ if (data->ioc_pbuf1 && !data->ioc_plen1)
+ return true;
+
+ if (data->ioc_pbuf2 && !data->ioc_plen2)
+ return true;
+
+ if (data->ioc_plen1 && !data->ioc_pbuf1)
+ return true;
+
+ if (data->ioc_plen2 && !data->ioc_pbuf2)
+ return true;
+
+ if (libcfs_ioctl_packlen(data) != data->ioc_hdr.ioc_len)
+ return true;
+
+ if (data->ioc_inllen1 &&
+ data->ioc_bulk[((data->ioc_inllen1 + 7) & ~7) +
+ data->ioc_inllen2 - 1] != '\0')
+ return true;
+
+ return false;
+}
int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
{
+ ENTRY;
+
if (libcfs_ioctl_is_invalid(data)) {
- CERROR("LNET: ioctl not correctly formatted\n");
+ CERROR("libcfs ioctl: parameter not correctly formatted\n");
RETURN(-EINVAL);
}
if (data->ioc_inllen2 != 0)
data->ioc_inlbuf2 = &data->ioc_bulk[0] +
- cfs_size_round(data->ioc_inllen1);
+ cfs_size_round(data->ioc_inllen1);
RETURN(0);
}
-int libcfs_ioctl_getdata_len(const struct libcfs_ioctl_hdr __user *arg,
- __u32 *len)
+int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
+ struct libcfs_ioctl_hdr __user *uhdr)
{
- struct libcfs_ioctl_hdr hdr;
+ struct libcfs_ioctl_hdr hdr;
+ int err;
ENTRY;
- if (copy_from_user(&hdr, arg, sizeof(hdr)))
+ if (copy_from_user(&hdr, uhdr, sizeof(hdr)))
RETURN(-EFAULT);
if (hdr.ioc_version != LIBCFS_IOCTL_VERSION &&
hdr.ioc_version != LIBCFS_IOCTL_VERSION2) {
- CERROR("LNET: version mismatch expected %#x, got %#x\n",
+ CERROR("libcfs ioctl: version mismatch expected %#x, got %#x\n",
LIBCFS_IOCTL_VERSION, hdr.ioc_version);
RETURN(-EINVAL);
}
- *len = hdr.ioc_len;
-
- RETURN(0);
-}
-
-int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr *buf, __u32 buf_len,
- const void __user *arg)
-{
- ENTRY;
+ if (hdr.ioc_len < sizeof(struct libcfs_ioctl_hdr)) {
+ CERROR("libcfs ioctl: user buffer too small for ioctl\n");
+ RETURN(-EINVAL);
+ }
- if (copy_from_user(buf, arg, buf_len))
+ 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);
+ }
- RETURN(0);
-}
+ LIBCFS_ALLOC(*hdr_pp, hdr.ioc_len);
+ if (*hdr_pp == NULL)
+ RETURN(-ENOMEM);
-int libcfs_ioctl_popdata(void *arg, void *data, int size)
-{
- if (copy_to_user((char *)arg, data, size))
- return -EFAULT;
- return 0;
-}
+ if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len))
+ GOTO(free, err = -EFAULT);
-extern struct cfs_psdev_ops libcfs_psdev_ops;
+ if ((*hdr_pp)->ioc_version != hdr.ioc_version ||
+ (*hdr_pp)->ioc_len != hdr.ioc_len) {
+ GOTO(free, err = -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;
-}
+ 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;
+free:
+ LIBCFS_FREE(*hdr_pp, hdr.ioc_len);
+ RETURN(err);
}
-static long libcfs_ioctl(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 (!capable(CAP_SYS_ADMIN))
return -EACCES;
_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 (!cfs_capable(CFS_CAP_SYS_BOOT))
- return (-EPERM);
- panic("debugctl-invoked panic");
- return (0);
- case IOC_LIBCFS_MEMHOG:
- if (!cfs_capable(CFS_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 = {
- unlocked_ioctl: libcfs_ioctl,
- open : libcfs_psdev_open,
- release : libcfs_psdev_release
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = libcfs_psdev_ioctl,
};
struct miscdevice libcfs_dev = {
- LNET_MINOR,
- "lnet",
- &libcfs_fops
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "lnet",
+ .fops = &libcfs_fops
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff