--- /dev/null
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 version 2 for more details (a copy is included
+ * 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
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/linux/linux-module.c
+ *
+ * Object Devices Class Driver
+ * These are the only exported functions, they provide some generic
+ * infrastructure for managing object devices
+ */
+
+#define DEBUG_SUBSYSTEM S_CLASS
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/lp.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/fcntl.h>
+#include <linux/delay.h>
+#include <linux/skbuff.h>
+#include <linux/proc_fs.h>
+#include <linux/fs.h>
+#include <linux/poll.h>
+#include <linux/list.h>
+#include <linux/highmem.h>
+#include <linux/io.h>
+#include <asm/ioctls.h>
+#include <linux/poll.h>
+#include <linux/uaccess.h>
+#include <linux/miscdevice.h>
+#include <linux/seq_file.h>
+
+#include "../../../include/linux/libcfs/libcfs.h"
+#include "../../../include/linux/lnet/lnetctl.h"
+#include "../../include/obd_support.h"
+#include "../../include/obd_class.h"
+#include "../../include/lprocfs_status.h"
+#include "../../include/lustre_ver.h"
+#include "../../include/lustre/lustre_build_version.h"
+
+int proc_version;
+
+/* buffer MUST be at least the size of obd_ioctl_hdr */
+int obd_ioctl_getdata(char **buf, int *len, void *arg)
+{
+ struct obd_ioctl_hdr hdr;
+ struct obd_ioctl_data *data;
+ int err;
+ int offset = 0;
+
+ if (copy_from_user(&hdr, (void *)arg, sizeof(hdr)))
+ return -EFAULT;
+
+ if (hdr.ioc_version != OBD_IOCTL_VERSION) {
+ CERROR("Version mismatch kernel (%x) vs application (%x)\n",
+ OBD_IOCTL_VERSION, hdr.ioc_version);
+ return -EINVAL;
+ }
+
+ if (hdr.ioc_len > OBD_MAX_IOCTL_BUFFER) {
+ CERROR("User buffer len %d exceeds %d max buffer\n",
+ hdr.ioc_len, OBD_MAX_IOCTL_BUFFER);
+ return -EINVAL;
+ }
+
+ if (hdr.ioc_len < sizeof(struct obd_ioctl_data)) {
+ CERROR("User buffer too small for ioctl (%d)\n", hdr.ioc_len);
+ return -EINVAL;
+ }
+
+ /* When there are lots of processes calling vmalloc on multi-core
+ * system, the high lock contention will hurt performance badly,
+ * obdfilter-survey is an example, which relies on ioctl. So we'd
+ * better avoid vmalloc on ioctl path. LU-66 */
+ OBD_ALLOC_LARGE(*buf, hdr.ioc_len);
+ if (*buf == NULL) {
+ CERROR("Cannot allocate control buffer of len %d\n",
+ hdr.ioc_len);
+ return -EINVAL;
+ }
+ *len = hdr.ioc_len;
+ data = (struct obd_ioctl_data *)*buf;
+
+ if (copy_from_user(*buf, (void *)arg, hdr.ioc_len)) {
+ err = -EFAULT;
+ goto free_buf;
+ }
+ if (hdr.ioc_len != data->ioc_len) {
+ err = -EINVAL;
+ goto free_buf;
+ }
+
+ if (obd_ioctl_is_invalid(data)) {
+ CERROR("ioctl not correctly formatted\n");
+ err = -EINVAL;
+ goto free_buf;
+ }
+
+ if (data->ioc_inllen1) {
+ data->ioc_inlbuf1 = &data->ioc_bulk[0];
+ offset += cfs_size_round(data->ioc_inllen1);
+ }
+
+ if (data->ioc_inllen2) {
+ data->ioc_inlbuf2 = &data->ioc_bulk[0] + offset;
+ offset += cfs_size_round(data->ioc_inllen2);
+ }
+
+ if (data->ioc_inllen3) {
+ data->ioc_inlbuf3 = &data->ioc_bulk[0] + offset;
+ offset += cfs_size_round(data->ioc_inllen3);
+ }
+
+ if (data->ioc_inllen4) {
+ data->ioc_inlbuf4 = &data->ioc_bulk[0] + offset;
+ }
+
+ return 0;
+
+free_buf:
+ OBD_FREE_LARGE(*buf, hdr.ioc_len);
+ return err;
+}
+EXPORT_SYMBOL(obd_ioctl_getdata);
+
+int obd_ioctl_popdata(void *arg, void *data, int len)
+{
+ int err;
+
+ err = copy_to_user(arg, data, len);
+ if (err)
+ err = -EFAULT;
+ return err;
+}
+EXPORT_SYMBOL(obd_ioctl_popdata);
+
+/* opening /dev/obd */
+static int obd_class_open(struct inode *inode, struct file *file)
+{
+ try_module_get(THIS_MODULE);
+ return 0;
+}
+
+/* closing /dev/obd */
+static int obd_class_release(struct inode *inode, struct file *file)
+{
+ module_put(THIS_MODULE);
+ return 0;
+}
+
+/* to control /dev/obd */
+static long obd_class_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ int err = 0;
+
+ /* Allow non-root access for OBD_IOC_PING_TARGET - used by lfs check */
+ if (!capable(CFS_CAP_SYS_ADMIN) && (cmd != OBD_IOC_PING_TARGET))
+ return err = -EACCES;
+ if ((cmd & 0xffffff00) == ((int)'T') << 8) /* ignore all tty ioctls */
+ return err = -ENOTTY;
+
+ err = class_handle_ioctl(cmd, (unsigned long)arg);
+
+ return err;
+}
+
+/* declare character device */
+static struct file_operations obd_psdev_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = obd_class_ioctl, /* unlocked_ioctl */
+ .open = obd_class_open, /* open */
+ .release = obd_class_release, /* release */
+};
+
+/* modules setup */
+struct miscdevice obd_psdev = {
+ .minor = OBD_DEV_MINOR,
+ .name = OBD_DEV_NAME,
+ .fops = &obd_psdev_fops,
+};
+
+
+#if defined (CONFIG_PROC_FS)
+static int obd_proc_version_seq_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "lustre: %s\nkernel: %s\nbuild: %s\n",
+ LUSTRE_VERSION_STRING, "patchless_client", BUILD_VERSION);
+ return 0;
+}
+LPROC_SEQ_FOPS_RO(obd_proc_version);
+
+int obd_proc_pinger_seq_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%s\n", "on");
+ return 0;
+}
+LPROC_SEQ_FOPS_RO(obd_proc_pinger);
+
+static int obd_proc_health_seq_show(struct seq_file *m, void *v)
+{
+ bool healthy = true;
+ int i;
+
+ if (libcfs_catastrophe)
+ seq_printf(m, "LBUG\n");
+
+ read_lock(&obd_dev_lock);
+ for (i = 0; i < class_devno_max(); i++) {
+ struct obd_device *obd;
+
+ obd = class_num2obd(i);
+ if (obd == NULL || !obd->obd_attached || !obd->obd_set_up)
+ continue;
+
+ LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
+ if (obd->obd_stopping)
+ continue;
+
+ class_incref(obd, __func__, current);
+ read_unlock(&obd_dev_lock);
+
+ if (obd_health_check(NULL, obd)) {
+ seq_printf(m, "device %s reported unhealthy\n",
+ obd->obd_name);
+ healthy = false;
+ }
+ class_decref(obd, __func__, current);
+ read_lock(&obd_dev_lock);
+ }
+ read_unlock(&obd_dev_lock);
+
+ if (healthy)
+ seq_puts(m, "healthy\n");
+ else
+ seq_puts(m, "NOT HEALTHY\n");
+
+ return 0;
+}
+LPROC_SEQ_FOPS_RO(obd_proc_health);
+
+static int obd_proc_jobid_var_seq_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%s\n", obd_jobid_var);
+ return 0;
+}
+
+static ssize_t obd_proc_jobid_var_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
+{
+ if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
+ return -EINVAL;
+
+ memset(obd_jobid_var, 0, JOBSTATS_JOBID_VAR_MAX_LEN + 1);
+
+ /* This might leave the var invalid on error, which is probably fine.*/
+ if (copy_from_user(obd_jobid_var, buffer, count))
+ return -EFAULT;
+
+ /* Trim the trailing '\n' if any */
+ if (obd_jobid_var[count - 1] == '\n')
+ obd_jobid_var[count - 1] = 0;
+
+ return count;
+}
+LPROC_SEQ_FOPS(obd_proc_jobid_var);
+
+static int obd_proc_jobid_name_seq_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%s\n", obd_jobid_var);
+ return 0;
+}
+
+static ssize_t obd_proc_jobid_name_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
+{
+ if (!count || count > JOBSTATS_JOBID_SIZE)
+ return -EINVAL;
+
+ if (copy_from_user(obd_jobid_node, buffer, count))
+ return -EFAULT;
+
+ obd_jobid_node[count] = 0;
+
+ /* Trim the trailing '\n' if any */
+ if (obd_jobid_node[count - 1] == '\n')
+ obd_jobid_node[count - 1] = 0;
+
+ return count;
+}
+LPROC_SEQ_FOPS(obd_proc_jobid_name);
+
+/* Root for /proc/fs/lustre */
+struct proc_dir_entry *proc_lustre_root = NULL;
+EXPORT_SYMBOL(proc_lustre_root);
+
+struct lprocfs_vars lprocfs_base[] = {
+ { "version", &obd_proc_version_fops },
+ { "pinger", &obd_proc_pinger_fops },
+ { "health_check", &obd_proc_health_fops },
+ { "jobid_var", &obd_proc_jobid_var_fops },
+ { .name = "jobid_name",
+ .fops = &obd_proc_jobid_name_fops},
+ { NULL }
+};
+
+static void *obd_device_list_seq_start(struct seq_file *p, loff_t *pos)
+{
+ if (*pos >= class_devno_max())
+ return NULL;
+
+ return pos;
+}
+
+static void obd_device_list_seq_stop(struct seq_file *p, void *v)
+{
+}
+
+static void *obd_device_list_seq_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ ++*pos;
+ if (*pos >= class_devno_max())
+ return NULL;
+
+ return pos;
+}
+
+static int obd_device_list_seq_show(struct seq_file *p, void *v)
+{
+ loff_t index = *(loff_t *)v;
+ struct obd_device *obd = class_num2obd((int)index);
+ char *status;
+
+ if (obd == NULL)
+ return 0;
+
+ LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
+ if (obd->obd_stopping)
+ status = "ST";
+ else if (obd->obd_inactive)
+ status = "IN";
+ else if (obd->obd_set_up)
+ status = "UP";
+ else if (obd->obd_attached)
+ status = "AT";
+ else
+ status = "--";
+
+ seq_printf(p, "%3d %s %s %s %s %d\n",
+ (int)index, status, obd->obd_type->typ_name,
+ obd->obd_name, obd->obd_uuid.uuid,
+ atomic_read(&obd->obd_refcount));
+ return 0;
+}
+
+struct seq_operations obd_device_list_sops = {
+ .start = obd_device_list_seq_start,
+ .stop = obd_device_list_seq_stop,
+ .next = obd_device_list_seq_next,
+ .show = obd_device_list_seq_show,
+};
+
+static int obd_device_list_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ int rc = seq_open(file, &obd_device_list_sops);
+
+ if (rc)
+ return rc;
+
+ seq = file->private_data;
+ seq->private = PDE_DATA(inode);
+
+ return 0;
+}
+
+struct file_operations obd_device_list_fops = {
+ .owner = THIS_MODULE,
+ .open = obd_device_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+int class_procfs_init(void)
+{
+ int rc = 0;
+
+ proc_lustre_root = lprocfs_register("fs/lustre", NULL,
+ lprocfs_base, NULL);
+ if (IS_ERR(proc_lustre_root)) {
+ rc = PTR_ERR(proc_lustre_root);
+ proc_lustre_root = NULL;
+ goto out;
+ }
+
+ rc = lprocfs_seq_create(proc_lustre_root, "devices", 0444,
+ &obd_device_list_fops, NULL);
+out:
+ if (rc)
+ CERROR("error adding /proc/fs/lustre/devices file\n");
+ return 0;
+}
+
+int class_procfs_clean(void)
+{
+ if (proc_lustre_root) {
+ lprocfs_remove(&proc_lustre_root);
+ }
+ return 0;
+}
+#endif /* CONFIG_PROC_FS */
Code Review / kvmfornfv.git / blobdiff