4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2012, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/obdclass/linux/linux-module.c
34 * Object Devices Class Driver
35 * These are the only exported functions, they provide some generic
36 * infrastructure for managing object devices
39 #define DEBUG_SUBSYSTEM S_CLASS
41 #include <linux/module.h>
42 #include <linux/errno.h>
43 #include <linux/kernel.h>
44 #include <linux/major.h>
45 #include <linux/sched.h>
47 #include <linux/slab.h>
48 #include <linux/ioport.h>
49 #include <linux/fcntl.h>
50 #include <linux/delay.h>
51 #include <linux/skbuff.h>
53 #include <linux/poll.h>
54 #include <linux/list.h>
55 #include <linux/highmem.h>
57 #include <asm/ioctls.h>
58 #include <linux/uaccess.h>
59 #include <linux/miscdevice.h>
60 #include <linux/seq_file.h>
61 #include <linux/kobject.h>
63 #include "../../../include/linux/libcfs/libcfs.h"
64 #include "../../../include/uapi/linux/lnet/lnetctl.h"
65 #include "../../include/obd_support.h"
66 #include "../../include/obd_class.h"
67 #include "../../include/lprocfs_status.h"
68 #include "../../../include/uapi/linux/lustre/lustre_ioctl.h"
69 #include "../../include/lustre_ver.h"
71 static int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
73 if (data->ioc_len > BIT(30)) {
74 CERROR("OBD ioctl: ioc_len larger than 1<<30\n");
78 if (data->ioc_inllen1 > BIT(30)) {
79 CERROR("OBD ioctl: ioc_inllen1 larger than 1<<30\n");
83 if (data->ioc_inllen2 > BIT(30)) {
84 CERROR("OBD ioctl: ioc_inllen2 larger than 1<<30\n");
88 if (data->ioc_inllen3 > BIT(30)) {
89 CERROR("OBD ioctl: ioc_inllen3 larger than 1<<30\n");
93 if (data->ioc_inllen4 > BIT(30)) {
94 CERROR("OBD ioctl: ioc_inllen4 larger than 1<<30\n");
98 if (data->ioc_inlbuf1 && data->ioc_inllen1 == 0) {
99 CERROR("OBD ioctl: inlbuf1 pointer but 0 length\n");
103 if (data->ioc_inlbuf2 && data->ioc_inllen2 == 0) {
104 CERROR("OBD ioctl: inlbuf2 pointer but 0 length\n");
108 if (data->ioc_inlbuf3 && data->ioc_inllen3 == 0) {
109 CERROR("OBD ioctl: inlbuf3 pointer but 0 length\n");
113 if (data->ioc_inlbuf4 && data->ioc_inllen4 == 0) {
114 CERROR("OBD ioctl: inlbuf4 pointer but 0 length\n");
118 if (data->ioc_pbuf1 && data->ioc_plen1 == 0) {
119 CERROR("OBD ioctl: pbuf1 pointer but 0 length\n");
123 if (data->ioc_pbuf2 && data->ioc_plen2 == 0) {
124 CERROR("OBD ioctl: pbuf2 pointer but 0 length\n");
128 if (!data->ioc_pbuf1 && data->ioc_plen1 != 0) {
129 CERROR("OBD ioctl: plen1 set but NULL pointer\n");
133 if (!data->ioc_pbuf2 && data->ioc_plen2 != 0) {
134 CERROR("OBD ioctl: plen2 set but NULL pointer\n");
138 if (obd_ioctl_packlen(data) > data->ioc_len) {
139 CERROR("OBD ioctl: packlen exceeds ioc_len (%d > %d)\n",
140 obd_ioctl_packlen(data), data->ioc_len);
147 /* buffer MUST be at least the size of obd_ioctl_hdr */
148 int obd_ioctl_getdata(char **buf, int *len, void __user *arg)
150 struct obd_ioctl_hdr hdr;
151 struct obd_ioctl_data *data;
155 if (copy_from_user(&hdr, arg, sizeof(hdr)))
158 if (hdr.ioc_version != OBD_IOCTL_VERSION) {
159 CERROR("Version mismatch kernel (%x) vs application (%x)\n",
160 OBD_IOCTL_VERSION, hdr.ioc_version);
164 if (hdr.ioc_len > OBD_MAX_IOCTL_BUFFER) {
165 CERROR("User buffer len %d exceeds %d max buffer\n",
166 hdr.ioc_len, OBD_MAX_IOCTL_BUFFER);
170 if (hdr.ioc_len < sizeof(struct obd_ioctl_data)) {
171 CERROR("User buffer too small for ioctl (%d)\n", hdr.ioc_len);
175 /* When there are lots of processes calling vmalloc on multi-core
176 * system, the high lock contention will hurt performance badly,
177 * obdfilter-survey is an example, which relies on ioctl. So we'd
178 * better avoid vmalloc on ioctl path. LU-66
180 *buf = libcfs_kvzalloc(hdr.ioc_len, GFP_NOFS);
182 CERROR("Cannot allocate control buffer of len %d\n",
187 data = (struct obd_ioctl_data *)*buf;
189 if (copy_from_user(*buf, arg, hdr.ioc_len)) {
193 if (hdr.ioc_len != data->ioc_len) {
198 if (obd_ioctl_is_invalid(data)) {
199 CERROR("ioctl not correctly formatted\n");
204 if (data->ioc_inllen1) {
205 data->ioc_inlbuf1 = &data->ioc_bulk[0];
206 offset += cfs_size_round(data->ioc_inllen1);
209 if (data->ioc_inllen2) {
210 data->ioc_inlbuf2 = &data->ioc_bulk[0] + offset;
211 offset += cfs_size_round(data->ioc_inllen2);
214 if (data->ioc_inllen3) {
215 data->ioc_inlbuf3 = &data->ioc_bulk[0] + offset;
216 offset += cfs_size_round(data->ioc_inllen3);
219 if (data->ioc_inllen4)
220 data->ioc_inlbuf4 = &data->ioc_bulk[0] + offset;
228 EXPORT_SYMBOL(obd_ioctl_getdata);
230 /* opening /dev/obd */
231 static int obd_class_open(struct inode *inode, struct file *file)
233 try_module_get(THIS_MODULE);
237 /* closing /dev/obd */
238 static int obd_class_release(struct inode *inode, struct file *file)
240 module_put(THIS_MODULE);
244 /* to control /dev/obd */
245 static long obd_class_ioctl(struct file *filp, unsigned int cmd,
250 /* Allow non-root access for OBD_IOC_PING_TARGET - used by lfs check */
251 if (!capable(CFS_CAP_SYS_ADMIN) && (cmd != OBD_IOC_PING_TARGET))
252 return err = -EACCES;
253 if ((cmd & 0xffffff00) == ((int)'T') << 8) /* ignore all tty ioctls */
254 return err = -ENOTTY;
256 err = class_handle_ioctl(cmd, (unsigned long)arg);
261 /* declare character device */
262 static const struct file_operations obd_psdev_fops = {
263 .owner = THIS_MODULE,
264 .unlocked_ioctl = obd_class_ioctl, /* unlocked_ioctl */
265 .open = obd_class_open, /* open */
266 .release = obd_class_release, /* release */
270 struct miscdevice obd_psdev = {
271 .minor = OBD_DEV_MINOR,
272 .name = OBD_DEV_NAME,
273 .fops = &obd_psdev_fops,
276 static ssize_t version_show(struct kobject *kobj, struct attribute *attr,
279 return sprintf(buf, "%s\n", LUSTRE_VERSION_STRING);
282 static ssize_t pinger_show(struct kobject *kobj, struct attribute *attr,
285 return sprintf(buf, "%s\n", "on");
289 health_check_show(struct kobject *kobj, struct attribute *attr, char *buf)
295 if (libcfs_catastrophe)
296 return sprintf(buf, "LBUG\n");
298 read_lock(&obd_dev_lock);
299 for (i = 0; i < class_devno_max(); i++) {
300 struct obd_device *obd;
302 obd = class_num2obd(i);
303 if (!obd || !obd->obd_attached || !obd->obd_set_up)
306 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
307 if (obd->obd_stopping)
310 class_incref(obd, __func__, current);
311 read_unlock(&obd_dev_lock);
313 if (obd_health_check(NULL, obd))
315 class_decref(obd, __func__, current);
316 read_lock(&obd_dev_lock);
318 read_unlock(&obd_dev_lock);
321 len = sprintf(buf, "healthy\n");
323 len = sprintf(buf, "NOT HEALTHY\n");
328 static ssize_t jobid_var_show(struct kobject *kobj, struct attribute *attr,
331 return snprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_var);
334 static ssize_t jobid_var_store(struct kobject *kobj, struct attribute *attr,
338 if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
341 memset(obd_jobid_var, 0, JOBSTATS_JOBID_VAR_MAX_LEN + 1);
343 memcpy(obd_jobid_var, buffer, count);
345 /* Trim the trailing '\n' if any */
346 if (obd_jobid_var[count - 1] == '\n')
347 obd_jobid_var[count - 1] = 0;
352 static ssize_t jobid_name_show(struct kobject *kobj, struct attribute *attr,
355 return snprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_node);
358 static ssize_t jobid_name_store(struct kobject *kobj, struct attribute *attr,
362 if (!count || count > LUSTRE_JOBID_SIZE)
365 memcpy(obd_jobid_node, buffer, count);
367 obd_jobid_node[count] = 0;
369 /* Trim the trailing '\n' if any */
370 if (obd_jobid_node[count - 1] == '\n')
371 obd_jobid_node[count - 1] = 0;
376 /* Root for /sys/kernel/debug/lustre */
377 struct dentry *debugfs_lustre_root;
378 EXPORT_SYMBOL_GPL(debugfs_lustre_root);
380 LUSTRE_RO_ATTR(version);
381 LUSTRE_RO_ATTR(pinger);
382 LUSTRE_RO_ATTR(health_check);
383 LUSTRE_RW_ATTR(jobid_var);
384 LUSTRE_RW_ATTR(jobid_name);
386 static struct attribute *lustre_attrs[] = {
387 &lustre_attr_version.attr,
388 &lustre_attr_pinger.attr,
389 &lustre_attr_health_check.attr,
390 &lustre_attr_jobid_name.attr,
391 &lustre_attr_jobid_var.attr,
395 static void *obd_device_list_seq_start(struct seq_file *p, loff_t *pos)
397 if (*pos >= class_devno_max())
403 static void obd_device_list_seq_stop(struct seq_file *p, void *v)
407 static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
410 if (*pos >= class_devno_max())
416 static int obd_device_list_seq_show(struct seq_file *p, void *v)
418 loff_t index = *(loff_t *)v;
419 struct obd_device *obd = class_num2obd((int)index);
425 LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
426 if (obd->obd_stopping)
428 else if (obd->obd_inactive)
430 else if (obd->obd_set_up)
432 else if (obd->obd_attached)
437 seq_printf(p, "%3d %s %s %s %s %d\n",
438 (int)index, status, obd->obd_type->typ_name,
439 obd->obd_name, obd->obd_uuid.uuid,
440 atomic_read(&obd->obd_refcount));
444 static const struct seq_operations obd_device_list_sops = {
445 .start = obd_device_list_seq_start,
446 .stop = obd_device_list_seq_stop,
447 .next = obd_device_list_seq_next,
448 .show = obd_device_list_seq_show,
451 static int obd_device_list_open(struct inode *inode, struct file *file)
453 struct seq_file *seq;
454 int rc = seq_open(file, &obd_device_list_sops);
459 seq = file->private_data;
460 seq->private = inode->i_private;
465 static const struct file_operations obd_device_list_fops = {
466 .owner = THIS_MODULE,
467 .open = obd_device_list_open,
470 .release = seq_release,
473 struct kobject *lustre_kobj;
474 EXPORT_SYMBOL_GPL(lustre_kobj);
476 static const struct attribute_group lustre_attr_group = {
477 .attrs = lustre_attrs,
480 int class_procfs_init(void)
485 lustre_kobj = kobject_create_and_add("lustre", fs_kobj);
489 /* Create the files associated with this kobject */
490 rc = sysfs_create_group(lustre_kobj, &lustre_attr_group);
492 kobject_put(lustre_kobj);
496 debugfs_lustre_root = debugfs_create_dir("lustre", NULL);
497 if (IS_ERR_OR_NULL(debugfs_lustre_root)) {
498 rc = debugfs_lustre_root ? PTR_ERR(debugfs_lustre_root)
500 debugfs_lustre_root = NULL;
501 kobject_put(lustre_kobj);
505 file = debugfs_create_file("devices", 0444, debugfs_lustre_root, NULL,
506 &obd_device_list_fops);
507 if (IS_ERR_OR_NULL(file)) {
508 rc = file ? PTR_ERR(file) : -ENOMEM;
509 kobject_put(lustre_kobj);
516 int class_procfs_clean(void)
518 debugfs_remove_recursive(debugfs_lustre_root);
520 debugfs_lustre_root = NULL;
522 kobject_put(lustre_kobj);