+++ /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.gnu.org/licenses/gpl-2.0.html
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2017, 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/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/init.h>
-#include <linux/list.h>
-#include <linux/highmem.h>
-#include <asm/io.h>
-#include <asm/ioctls.h>
-#include <asm/poll.h>
-#include <asm/uaccess.h>
-#include <linux/miscdevice.h>
-#include <linux/seq_file.h>
-#include <linux/kobject.h>
-
-#include <libcfs/libcfs.h>
-#include <obd_support.h>
-#include <obd_class.h>
-#include <lprocfs_status.h>
-#include <uapi/linux/lnet/lnetctl.h>
-#include <uapi/linux/lustre/lustre_ioctl.h>
-#include <uapi/linux/lustre/lustre_ver.h>
-
-#define OBD_MAX_IOCTL_BUFFER 8192
-
-static int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
-{
- if (data->ioc_len > BIT(30)) {
- CERROR("OBD ioctl: ioc_len larger than 1<<30\n");
- return 1;
- }
-
- if (data->ioc_inllen1 > BIT(30)) {
- CERROR("OBD ioctl: ioc_inllen1 larger than 1<<30\n");
- return 1;
- }
-
- if (data->ioc_inllen2 > BIT(30)) {
- CERROR("OBD ioctl: ioc_inllen2 larger than 1<<30\n");
- return 1;
- }
-
- if (data->ioc_inllen3 > BIT(30)) {
- CERROR("OBD ioctl: ioc_inllen3 larger than 1<<30\n");
- return 1;
- }
-
- if (data->ioc_inllen4 > BIT(30)) {
- CERROR("OBD ioctl: ioc_inllen4 larger than 1<<30\n");
- return 1;
- }
-
- if (data->ioc_inlbuf1 && data->ioc_inllen1 == 0) {
- CERROR("OBD ioctl: inlbuf1 pointer but 0 length\n");
- return 1;
- }
-
- if (data->ioc_inlbuf2 && data->ioc_inllen2 == 0) {
- CERROR("OBD ioctl: inlbuf2 pointer but 0 length\n");
- return 1;
- }
-
- if (data->ioc_inlbuf3 && data->ioc_inllen3 == 0) {
- CERROR("OBD ioctl: inlbuf3 pointer but 0 length\n");
- return 1;
- }
-
- if (data->ioc_inlbuf4 && data->ioc_inllen4 == 0) {
- CERROR("OBD ioctl: inlbuf4 pointer but 0 length\n");
- return 1;
- }
-
- if (data->ioc_pbuf1 && data->ioc_plen1 == 0) {
- CERROR("OBD ioctl: pbuf1 pointer but 0 length\n");
- return 1;
- }
-
- if (data->ioc_pbuf2 && data->ioc_plen2 == 0) {
- CERROR("OBD ioctl: pbuf2 pointer but 0 length\n");
- return 1;
- }
-
- if (!data->ioc_pbuf1 && data->ioc_plen1 != 0) {
- CERROR("OBD ioctl: plen1 set but NULL pointer\n");
- return 1;
- }
-
- if (!data->ioc_pbuf2 && data->ioc_plen2 != 0) {
- CERROR("OBD ioctl: plen2 set but NULL pointer\n");
- return 1;
- }
-
- if (obd_ioctl_packlen(data) > data->ioc_len) {
- CERROR("OBD ioctl: packlen exceeds ioc_len (%d > %d)\n",
- obd_ioctl_packlen(data), data->ioc_len);
- return 1;
- }
-
- return 0;
-}
-
-/* buffer MUST be at least the size of obd_ioctl_hdr */
-int obd_ioctl_getdata(char **buf, int *len, void __user *arg)
-{
- struct obd_ioctl_hdr hdr;
- struct obd_ioctl_data *data;
- int offset = 0;
- ENTRY;
-
- if (copy_from_user(&hdr, 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, arg, hdr.ioc_len)) {
- OBD_FREE_LARGE(*buf, hdr.ioc_len);
- RETURN(-EFAULT);
- }
-
- if (obd_ioctl_is_invalid(data)) {
- CERROR("ioctl not correctly formatted\n");
- OBD_FREE_LARGE(*buf, hdr.ioc_len);
- RETURN(-EINVAL);
- }
-
- 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);
-}
-EXPORT_SYMBOL(obd_ioctl_getdata);
-
-/* opening /dev/obd */
-static int obd_class_open(struct inode * inode, struct file * file)
-{
- ENTRY;
-
- try_module_get(THIS_MODULE);
- RETURN(0);
-}
-
-/* closing /dev/obd */
-static int obd_class_release(struct inode * inode, struct file * file)
-{
- ENTRY;
-
- 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;
- ENTRY;
-
- /* Allow non-root access for OBD_IOC_PING_TARGET - used by lfs check */
- if (!cfs_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 = MISC_DYNAMIC_MINOR,
- .name = OBD_DEV_NAME,
- .fops = &obd_psdev_fops,
-};
-
-struct static_lustre_uintvalue_attr {
- struct {
- struct attribute attr;
- ssize_t (*show)(struct kobject *kobj, struct attribute *attr,
- char *buf);
- ssize_t (*store)(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t len);
- } u;
- int *value;
-};
-
-static ssize_t static_uintvalue_show(struct kobject *kobj,
- struct attribute *attr,
- char *buf)
-{
- struct static_lustre_uintvalue_attr *lattr = (void *)attr;
-
- return sprintf(buf, "%d\n", *lattr->value);
-}
-
-static ssize_t static_uintvalue_store(struct kobject *kobj,
- struct attribute *attr,
- const char *buffer, size_t count)
-{
- struct static_lustre_uintvalue_attr *lattr = (void *)attr;
- unsigned int val;
- int rc;
-
- rc = kstrtouint(buffer, 10, &val);
- if (rc)
- return rc;
-
- *lattr->value = val;
-
- return count;
-}
-
-#define LUSTRE_STATIC_UINT_ATTR(name, value) \
-static struct static_lustre_uintvalue_attr lustre_sattr_##name = \
- { __ATTR(name, 0644, static_uintvalue_show, \
- static_uintvalue_store), value }
-
-LUSTRE_STATIC_UINT_ATTR(timeout, &obd_timeout);
-LUSTRE_STATIC_UINT_ATTR(debug_peer_on_timeout, &obd_debug_peer_on_timeout);
-LUSTRE_STATIC_UINT_ATTR(dump_on_timeout, &obd_dump_on_timeout);
-LUSTRE_STATIC_UINT_ATTR(dump_on_eviction, &obd_dump_on_eviction);
-LUSTRE_STATIC_UINT_ATTR(at_min, &at_min);
-LUSTRE_STATIC_UINT_ATTR(at_max, &at_max);
-LUSTRE_STATIC_UINT_ATTR(at_extra, &at_extra);
-LUSTRE_STATIC_UINT_ATTR(at_early_margin, &at_early_margin);
-LUSTRE_STATIC_UINT_ATTR(at_history, &at_history);
-
-#ifdef HAVE_SERVER_SUPPORT
-LUSTRE_STATIC_UINT_ATTR(ldlm_timeout, &ldlm_timeout);
-LUSTRE_STATIC_UINT_ATTR(bulk_timeout, &bulk_timeout);
-#endif
-
-static ssize_t memused_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%llu\n", obd_memory_sum());
-}
-LUSTRE_RO_ATTR(memused);
-
-static ssize_t memused_max_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%llu\n", obd_memory_max());
-}
-LUSTRE_RO_ATTR(memused_max);
-
-static ssize_t max_dirty_mb_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%lu\n",
- obd_max_dirty_pages / (1 << (20 - PAGE_SHIFT)));
-}
-
-static ssize_t max_dirty_mb_store(struct kobject *kobj, struct attribute *attr,
- const char *buffer, size_t count)
-{
- unsigned long val;
- int rc;
-
- rc = kstrtoul(buffer, 10, &val);
- if (rc)
- return rc;
-
- val *= 1 << (20 - PAGE_SHIFT); /* convert to pages */
-
- if (val > ((totalram_pages / 10) * 9)) {
- /* Somebody wants to assign too much memory to dirty pages */
- return -EINVAL;
- }
-
- if (val < 4 << (20 - PAGE_SHIFT)) {
- /* Less than 4 Mb for dirty cache is also bad */
- return -EINVAL;
- }
-
- obd_max_dirty_pages = val;
-
- return count;
-}
-LUSTRE_RW_ATTR(max_dirty_mb);
-
-static ssize_t version_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- return sprintf(buf, "%s\n", LUSTRE_VERSION_STRING);
-}
-
-static ssize_t pinger_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
-#ifdef ENABLE_PINGER
- const char *state = "on";
-#else
- const char *state = "off";
-#endif
- return sprintf(buf, "%s\n", state);
-}
-
-/**
- * Check all obd devices health
- *
- * \param kobj
- * \param buf [in]
- *
- * \retval number of characters printed if healthy
- */
-static ssize_t
-health_check_show(struct kobject *kobj, struct attribute *attr, char *buf)
-{
- bool healthy = true;
- size_t len = 0;
- int i;
-
- if (libcfs_catastrophe) {
- len = sprintf(buf, "LBUG\n");
- healthy = false;
- }
-
- 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, __FUNCTION__, current);
- read_unlock(&obd_dev_lock);
-
- if (obd_health_check(NULL, obd)) {
- len = sprintf(buf, "device %s reported unhealthy\n",
- obd->obd_name);
- healthy = false;
- }
- class_decref(obd, __FUNCTION__, current);
- read_lock(&obd_dev_lock);
- }
- read_unlock(&obd_dev_lock);
-
- if (healthy)
- len = sprintf(buf, "healthy\n");
- else
- len = sprintf(buf, "NOT HEALTHY\n");
-
- return len;
-}
-
-static ssize_t jobid_var_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- int rc = 0;
-
- if (strlen(obd_jobid_var))
- rc = snprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_var);
- return rc;
-}
-
-static ssize_t jobid_var_store(struct kobject *kobj, struct attribute *attr,
- const char *buffer, size_t count)
-{
- if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
- return -EINVAL;
-
- memset(obd_jobid_var, 0, JOBSTATS_JOBID_VAR_MAX_LEN + 1);
-
- memcpy(obd_jobid_var, buffer, count);
-
- /* Trim the trailing '\n' if any */
- if (obd_jobid_var[count - 1] == '\n')
- obd_jobid_var[count - 1] = 0;
-
- return count;
-}
-
-static ssize_t jobid_name_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- int rc = 0;
-
- if (strlen(obd_jobid_name))
- rc = snprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_name);
- return rc;
-}
-
-static ssize_t jobid_name_store(struct kobject *kobj, struct attribute *attr,
- const char *buffer, size_t count)
-{
- if (!count || count > LUSTRE_JOBID_SIZE)
- return -EINVAL;
-
- if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) != 0 &&
- !strchr(buffer, '%')) {
- lustre_jobid_clear(buffer);
- return count;
- }
-
- /* clear previous value */
- memset(obd_jobid_name, 0, LUSTRE_JOBID_SIZE);
-
- memcpy(obd_jobid_name, buffer, count);
-
- /* Trim the trailing '\n' if any */
- if (obd_jobid_name[count - 1] == '\n') {
- /* Don't echo just a newline */
- if (count == 1)
- return -EINVAL;
- obd_jobid_name[count - 1] = 0;
- }
-
- return count;
-}
-
-/* Root for /sys/kernel/debug/lustre */
-struct dentry *debugfs_lustre_root;
-EXPORT_SYMBOL_GPL(debugfs_lustre_root);
-
-#ifdef CONFIG_PROC_FS
-/* Root for /proc/fs/lustre */
-struct proc_dir_entry *proc_lustre_root = NULL;
-EXPORT_SYMBOL(proc_lustre_root);
-#else
-#define lprocfs_base NULL
-#endif /* CONFIG_PROC_FS */
-
-LUSTRE_RO_ATTR(version);
-LUSTRE_RO_ATTR(pinger);
-LUSTRE_RO_ATTR(health_check);
-LUSTRE_RW_ATTR(jobid_var);
-LUSTRE_RW_ATTR(jobid_name);
-
-static struct attribute *lustre_attrs[] = {
- &lustre_attr_version.attr,
- &lustre_attr_pinger.attr,
- &lustre_attr_health_check.attr,
- &lustre_attr_jobid_name.attr,
- &lustre_attr_jobid_var.attr,
- &lustre_sattr_timeout.u.attr,
- &lustre_attr_max_dirty_mb.attr,
- &lustre_sattr_debug_peer_on_timeout.u.attr,
- &lustre_sattr_dump_on_timeout.u.attr,
- &lustre_sattr_dump_on_eviction.u.attr,
- &lustre_sattr_at_min.u.attr,
- &lustre_sattr_at_max.u.attr,
- &lustre_sattr_at_extra.u.attr,
- &lustre_sattr_at_early_margin.u.attr,
- &lustre_sattr_at_history.u.attr,
- &lustre_attr_memused_max.attr,
- &lustre_attr_memused.attr,
-#ifdef HAVE_SERVER_SUPPORT
- &lustre_sattr_ldlm_timeout.u.attr,
- &lustre_sattr_bulk_timeout.u.attr,
-#endif
- 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;
-}
-
-static const 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 = inode->i_private;
- return 0;
-}
-
-static const struct file_operations obd_device_list_fops = {
- .owner = THIS_MODULE,
- .open = obd_device_list_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-struct kset *lustre_kset;
-EXPORT_SYMBOL_GPL(lustre_kset);
-
-static struct attribute_group lustre_attr_group = {
- .attrs = lustre_attrs,
-};
-
-ssize_t class_set_global(const char *param)
-{
- const char *value = strchr(param, '=') + 1;
- size_t off = value - param - 1;
- ssize_t count = -ENOENT;
- int i;
-
- for (i = 0; lustre_attrs[i]; i++) {
- if (!strncmp(lustre_attrs[i]->name, param, off)) {
- count = lustre_attr_store(&lustre_kset->kobj,
- lustre_attrs[i], value,
- strlen(value));
- break;
- }
- }
- return count;
-}
-
-int class_procfs_init(void)
-{
- struct proc_dir_entry *entry;
- struct dentry *file;
- int rc = -ENOMEM;
- ENTRY;
-
- lustre_kset = kset_create_and_add("lustre", NULL, fs_kobj);
- if (!lustre_kset)
- goto out;
-
- /* Create the files associated with this kobject */
- rc = sysfs_create_group(&lustre_kset->kobj, &lustre_attr_group);
- if (rc) {
- kset_unregister(lustre_kset);
- goto out;
- }
-
- rc = jobid_cache_init();
- if (rc) {
- kset_unregister(lustre_kset);
- goto out;
- }
-
- debugfs_lustre_root = debugfs_create_dir("lustre", NULL);
- if (IS_ERR_OR_NULL(debugfs_lustre_root)) {
- rc = debugfs_lustre_root ? PTR_ERR(debugfs_lustre_root)
- : -ENOMEM;
- debugfs_lustre_root = NULL;
- kset_unregister(lustre_kset);
- goto out;
- }
-
- file = debugfs_create_file("devices", 0444, debugfs_lustre_root, NULL,
- &obd_device_list_fops);
- if (IS_ERR_OR_NULL(file)) {
- rc = file ? PTR_ERR(file) : -ENOMEM;
- debugfs_remove(debugfs_lustre_root);
- kset_unregister(lustre_kset);
- goto out;
- }
-
- entry = lprocfs_register("fs/lustre", NULL, NULL, NULL);
- if (IS_ERR(entry)) {
- rc = PTR_ERR(entry);
- CERROR("cannot create '/proc/fs/lustre': rc = %d\n", rc);
- debugfs_remove_recursive(debugfs_lustre_root);
- kset_unregister(lustre_kset);
- goto out;
- }
-
- proc_lustre_root = entry;
-out:
- RETURN(rc);
-}
-
-int class_procfs_clean(void)
-{
- ENTRY;
-
- debugfs_remove_recursive(debugfs_lustre_root);
-
- debugfs_lustre_root = NULL;
- jobid_cache_fini();
-
- if (proc_lustre_root)
- lprocfs_remove(&proc_lustre_root);
-
- sysfs_remove_group(&lustre_kset->kobj, &lustre_attr_group);
-
- kset_unregister(lustre_kset);
-
- RETURN(0);
-}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff