Branch HEAD

[fs/lustre-release.git] / libcfs / libcfs / winnt / winnt-module.c

diff --git a/libcfs/libcfs/winnt/winnt-module.c b/libcfs/libcfs/winnt/winnt-module.c
new file mode 100644 (file)
index 0000000..2b6b008
--- /dev/null
+++ b/libcfs/libcfs/winnt/winnt-module.c
@@ -0,0 +1,160 @@
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ *
+ *  Copyright (c) 2004 Cluster File Systems, Inc.
+ *
+ *   This file is part of Lustre, http://www.lustre.org.
+ *
+ *   Lustre is free software; you can redistribute it and/or modify it under
+ *   the terms of version 2 of the GNU General Public License as published by
+ *   the Free Software Foundation. Lustre is distributed in the hope that it
+ *   will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ *   warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details. You should have received a
+ *   copy of the GNU General Public License along with Lustre; if not, write
+ *   to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
+ *   USA.
+ */
+
+
+#define DEBUG_SUBSYSTEM S_LIBCFS
+
+#include <libcfs/libcfs.h>
+#include <libcfs/kp30.h>
+
+#define LIBCFS_MINOR 240
+
+int libcfs_ioctl_getdata(char *buf, char *end, void *arg)
+{
+        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;
+
+        err = copy_from_user(buf, (void *)arg, sizeof(*hdr));
+        if (err)
+                RETURN(err);
+
+        if (hdr->ioc_version != LIBCFS_IOCTL_VERSION) {
+                CERROR(("LIBCFS: version mismatch kernel vs application\n"));
+                RETURN(-EINVAL);
+        }
+
+        if (hdr->ioc_len + buf >= end) {
+                CERROR(("LIBCFS: user buffer exceeds kernel buffer\n"));
+                RETURN(-EINVAL);
+        }
+
+        if (hdr->ioc_len < sizeof(struct libcfs_ioctl_data)) {
+                CERROR(("LIBCFS: user buffer too small for ioctl\n"));
+                RETURN(-EINVAL);
+        }
+
+        err = copy_from_user(buf, (void *)arg, hdr->ioc_len);
+        if (err)
+                RETURN(err);
+
+        if (libcfs_ioctl_is_invalid(data)) {
+                CERROR(("LIBCFS: ioctl not correctly formatted\n"));
+                RETURN(-EINVAL);
+        }
+
+        if (data->ioc_inllen1)
+                data->ioc_inlbuf1 = &data->ioc_bulk[0];
+
+        if (data->ioc_inllen2)
+                data->ioc_inlbuf2 = &data->ioc_bulk[0] +
+                        size_round(data->ioc_inllen1);
+
+        RETURN(0);
+}
+                                                                                                                                                                        
+extern struct cfs_psdev_ops          libcfs_psdev_ops;
+
+static int 
+libcfs_psdev_open(cfs_file_t * file)
+{ 
+       struct libcfs_device_userstate **pdu = NULL;
+       int    rc = 0;
+
+       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;
+}
+
+/* called when closing /dev/device */
+static int 
+libcfs_psdev_release(cfs_file_t * file)
+{
+       struct libcfss_device_userstate *pdu;
+       int    rc = 0;
+
+       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;
+}
+
+static int 
+libcfs_ioctl(cfs_file_t * file, unsigned int cmd, ulong_ptr arg)
+{ 
+       struct cfs_psdev_file    pfile;
+       int    rc = 0;
+
+       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); 
+               CERROR(("debugctl-invoked panic"));
+        KeBugCheckEx('LUFS', (ULONG_PTR)libcfs_ioctl, (ULONG_PTR)NULL, (ULONG_PTR)NULL, (ULONG_PTR)NULL);
+
+               return (0);
+       case IOC_LIBCFS_MEMHOG:
+
+               if (!capable (CAP_SYS_ADMIN)) 
+                       return -EPERM;
+        break;
+       }
+
+       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);
+}
+
+static struct file_operations libcfs_fops = {
+    /* lseek: */  NULL,
+    /* read: */   NULL,
+    /* write: */  NULL,
+    /* ioctl: */  libcfs_ioctl,
+    /* open: */   libcfs_psdev_open,
+    /* release:*/ libcfs_psdev_release
+};
+
+cfs_psdev_t libcfs_dev = { 
+       LIBCFS_MINOR, 
+       "lnet", 
+       &libcfs_fops
+};
+