diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/linux/linux-module.c')
-rw-r--r-- | drivers/staging/lustre/lustre/obdclass/linux/linux-module.c | 531 |
1 files changed, 0 insertions, 531 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c deleted file mode 100644 index 7bceee7f121e..000000000000 --- a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c +++ /dev/null @@ -1,531 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * 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, 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/fs.h> -#include <linux/poll.h> -#include <linux/list.h> -#include <linux/highmem.h> -#include <linux/io.h> -#include <asm/ioctls.h> -#include <linux/uaccess.h> -#include <linux/miscdevice.h> -#include <linux/seq_file.h> -#include <linux/kobject.h> - -#include <linux/libcfs/libcfs.h> -#include <uapi/linux/lnet/lnetctl.h> -#include <obd_support.h> -#include <obd_class.h> -#include <lprocfs_status.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 err; - int offset = 0; - - 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 - */ - *buf = kvzalloc(hdr.ioc_len, GFP_KERNEL); - if (!*buf) { - 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)) { - 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: - kvfree(*buf); - return err; -} -EXPORT_SYMBOL(obd_ioctl_getdata); - -/* 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(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 const 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, -}; - -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) -{ - return sprintf(buf, "%s\n", "on"); -} - -static ssize_t -health_check_show(struct kobject *kobj, struct attribute *attr, char *buf) -{ - bool healthy = true; - int i; - size_t len = 0; - - if (libcfs_catastrophe) - return sprintf(buf, "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 || !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)) - healthy = false; - class_decref(obd, __func__, 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) -{ - return snprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_var); -} - -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) -{ - return snprintf(buf, PAGE_SIZE, "%s\n", obd_jobid_node); -} - -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; - - memcpy(obd_jobid_node, buffer, count); - - 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; -} - -/* Root for /sys/kernel/debug/lustre */ -struct dentry *debugfs_lustre_root; -EXPORT_SYMBOL_GPL(debugfs_lustre_root); - -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, - 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) - 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 kobject *lustre_kobj; -EXPORT_SYMBOL_GPL(lustre_kobj); - -static const struct attribute_group lustre_attr_group = { - .attrs = lustre_attrs, -}; - -int class_procfs_init(void) -{ - int rc = -ENOMEM; - struct dentry *file; - - lustre_kobj = kobject_create_and_add("lustre", fs_kobj); - if (!lustre_kobj) - goto out; - - /* Create the files associated with this kobject */ - rc = sysfs_create_group(lustre_kobj, &lustre_attr_group); - if (rc) { - kobject_put(lustre_kobj); - 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; - sysfs_remove_group(lustre_kobj, &lustre_attr_group); - kobject_put(lustre_kobj); - 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; - sysfs_remove_group(lustre_kobj, &lustre_attr_group); - kobject_put(lustre_kobj); - goto out; - } -out: - return rc; -} - -int class_procfs_clean(void) -{ - debugfs_remove_recursive(debugfs_lustre_root); - - debugfs_lustre_root = NULL; - - sysfs_remove_group(lustre_kobj, &lustre_attr_group); - kobject_put(lustre_kobj); - - return 0; -} |