*
* 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
*/
#define LNET_MINOR 240
+static inline size_t libcfs_ioctl_packlen(struct libcfs_ioctl_data *data)
+{
+ size_t len = sizeof(*data);
+
+ len += cfs_size_round(data->ioc_inllen1);
+ len += cfs_size_round(data->ioc_inllen2);
+ return len;
+}
+
+static inline bool libcfs_ioctl_is_invalid(struct libcfs_ioctl_data *data)
+{
+ if (data->ioc_hdr.ioc_len > BIT(30)) {
+ CERROR("LIBCFS ioctl: ioc_len larger than 1<<30\n");
+ return true;
+ }
+ if (data->ioc_inllen1 > BIT(30)) {
+ CERROR("LIBCFS ioctl: ioc_inllen1 larger than 1<<30\n");
+ return true;
+ }
+ if (data->ioc_inllen2 > BIT(30)) {
+ CERROR("LIBCFS ioctl: ioc_inllen2 larger than 1<<30\n");
+ return true;
+ }
+ if (data->ioc_inlbuf1 && !data->ioc_inllen1) {
+ CERROR("LIBCFS ioctl: inlbuf1 pointer but 0 length\n");
+ return true;
+ }
+ if (data->ioc_inlbuf2 && !data->ioc_inllen2) {
+ CERROR("LIBCFS ioctl: inlbuf2 pointer but 0 length\n");
+ return true;
+ }
+ if (data->ioc_pbuf1 && !data->ioc_plen1) {
+ CERROR("LIBCFS ioctl: pbuf1 pointer but 0 length\n");
+ return true;
+ }
+ if (data->ioc_pbuf2 && !data->ioc_plen2) {
+ CERROR("LIBCFS ioctl: pbuf2 pointer but 0 length\n");
+ return true;
+ }
+ if (data->ioc_plen1 && !data->ioc_pbuf1) {
+ CERROR("LIBCFS ioctl: plen1 nonzero but no pbuf1 pointer\n");
+ return true;
+ }
+ if (data->ioc_plen2 && !data->ioc_pbuf2) {
+ CERROR("LIBCFS ioctl: plen2 nonzero but no pbuf2 pointer\n");
+ return true;
+ }
+ if ((__u32)libcfs_ioctl_packlen(data) != data->ioc_hdr.ioc_len) {
+ CERROR("LIBCFS ioctl: packlen != ioc_len\n");
+ return true;
+ }
+ if (data->ioc_inllen1 &&
+ data->ioc_bulk[data->ioc_inllen1 - 1] != '\0') {
+ CERROR("LIBCFS ioctl: inlbuf1 not 0 terminated\n");
+ return true;
+ }
+ if (data->ioc_inllen2 &&
+ data->ioc_bulk[cfs_size_round(data->ioc_inllen1) +
+ data->ioc_inllen2 - 1] != '\0') {
+ CERROR("LIBCFS ioctl: inlbuf2 not 0 terminated\n");
+ return true;
+ }
+ return false;
+}
+
int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data)
{
if (libcfs_ioctl_is_invalid(data)) {
- CERROR("LNET: ioctl not correctly formatted\n");
+ CERROR("libcfs ioctl: parameter not correctly formatted\n");
return -EINVAL;
}
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,
+ const struct libcfs_ioctl_hdr __user *uhdr)
{
struct libcfs_ioctl_hdr hdr;
+ int err = 0;
- 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_popdata(void __user *arg, void *data, int size)
-{
- if (copy_to_user(arg, data, size))
- return -EFAULT;
- return 0;
-}
-
-static int
-libcfs_psdev_open(struct inode *inode, struct file *file)
-{
- int rc = 0;
+ if (hdr.ioc_len < sizeof(struct libcfs_ioctl_data)) {
+ CERROR("libcfs ioctl: user buffer too small for ioctl\n");
+ return -EINVAL;
+ }
- if (!inode)
+ 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 (libcfs_psdev_ops.p_open)
- rc = libcfs_psdev_ops.p_open(0, NULL);
- else
- return -EPERM;
- return rc;
-}
+ }
-/* called when closing /dev/device */
-static int
-libcfs_psdev_release(struct inode *inode, struct file *file)
-{
- int rc = 0;
+ LIBCFS_ALLOC(*hdr_pp, hdr.ioc_len);
+ if (!*hdr_pp)
+ return -ENOMEM;
- if (!inode)
- return -EINVAL;
- if (libcfs_psdev_ops.p_close)
- rc = libcfs_psdev_ops.p_close(0, NULL);
- else
- rc = -EPERM;
- return rc;
+ if (copy_from_user(*hdr_pp, uhdr, hdr.ioc_len)) {
+ LIBCFS_FREE(*hdr_pp, hdr.ioc_len);
+ err = -EFAULT;
+ }
+ 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;
return -EINVAL;
}
- /* Handle platform-dependent IOC requests */
- switch (cmd) {
- case IOC_LIBCFS_PANIC:
- if (!capable(CFS_CAP_SYS_BOOT))
- return -EPERM;
- panic("debugctl-invoked panic");
- return 0;
- }
-
- if (libcfs_psdev_ops.p_ioctl)
- rc = libcfs_psdev_ops.p_ioctl(&pfile, cmd, (void __user *)arg);
- else
- rc = -EPERM;
- return rc;
+ return libcfs_ioctl(cmd, (void __user *)arg);
}
static const 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 = {
projects / cascardo / linux.git / blobdiff