diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/libcfs/module.c')
| -rw-r--r-- | drivers/staging/lustre/lnet/libcfs/module.c | 604 |
1 files changed, 0 insertions, 604 deletions
diff --git a/drivers/staging/lustre/lnet/libcfs/module.c b/drivers/staging/lustre/lnet/libcfs/module.c deleted file mode 100644 index a03f924f1d7c..000000000000 --- a/drivers/staging/lustre/lnet/libcfs/module.c +++ /dev/null @@ -1,604 +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) 2008, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2012, 2015 Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - */ -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/string.h> -#include <linux/stat.h> -#include <linux/errno.h> -#include <linux/unistd.h> -#include <net/sock.h> -#include <linux/uio.h> - -#include <linux/uaccess.h> - -#include <linux/fs.h> -#include <linux/file.h> -#include <linux/list.h> - -#include <linux/sysctl.h> -#include <linux/debugfs.h> - -# define DEBUG_SUBSYSTEM S_LNET - -#include <linux/libcfs/libcfs.h> -#include <asm/div64.h> - -#include <linux/libcfs/libcfs_crypto.h> -#include <linux/lnet/lib-lnet.h> -#include <uapi/linux/lnet/lnet-dlc.h> -#include "tracefile.h" - -static struct dentry *lnet_debugfs_root; - -static DECLARE_RWSEM(ioctl_list_sem); -static LIST_HEAD(ioctl_list); - -int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand) -{ - int rc = 0; - - down_write(&ioctl_list_sem); - if (!list_empty(&hand->item)) - rc = -EBUSY; - else - list_add_tail(&hand->item, &ioctl_list); - up_write(&ioctl_list_sem); - - return rc; -} -EXPORT_SYMBOL(libcfs_register_ioctl); - -int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand) -{ - int rc = 0; - - down_write(&ioctl_list_sem); - if (list_empty(&hand->item)) - rc = -ENOENT; - else - list_del_init(&hand->item); - up_write(&ioctl_list_sem); - - return rc; -} -EXPORT_SYMBOL(libcfs_deregister_ioctl); - -int libcfs_ioctl(unsigned long cmd, void __user *uparam) -{ - struct libcfs_ioctl_data *data = NULL; - struct libcfs_ioctl_hdr *hdr; - int err; - - /* 'cmd' and permissions get checked in our arch-specific caller */ - err = libcfs_ioctl_getdata(&hdr, uparam); - if (err) { - CDEBUG_LIMIT(D_ERROR, - "libcfs ioctl: data header error %d\n", err); - return err; - } - - if (hdr->ioc_version == LIBCFS_IOCTL_VERSION) { - /* - * The libcfs_ioctl_data_adjust() function performs adjustment - * operations on the libcfs_ioctl_data structure to make - * it usable by the code. This doesn't need to be called - * for new data structures added. - */ - data = container_of(hdr, struct libcfs_ioctl_data, ioc_hdr); - err = libcfs_ioctl_data_adjust(data); - if (err) - goto out; - } - - CDEBUG(D_IOCTL, "libcfs ioctl cmd %lu\n", cmd); - switch (cmd) { - case IOC_LIBCFS_CLEAR_DEBUG: - libcfs_debug_clear_buffer(); - break; - - case IOC_LIBCFS_MARK_DEBUG: - if (!data || !data->ioc_inlbuf1 || - data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0') { - err = -EINVAL; - goto out; - } - libcfs_debug_mark_buffer(data->ioc_inlbuf1); - break; - - default: { - struct libcfs_ioctl_handler *hand; - - err = -EINVAL; - down_read(&ioctl_list_sem); - list_for_each_entry(hand, &ioctl_list, item) { - err = hand->handle_ioctl(cmd, hdr); - if (err == -EINVAL) - continue; - - if (!err) { - if (copy_to_user(uparam, hdr, hdr->ioc_len)) - err = -EFAULT; - } - break; - } - up_read(&ioctl_list_sem); - break; } - } -out: - kvfree(hdr); - return err; -} - -int lprocfs_call_handler(void *data, int write, loff_t *ppos, - void __user *buffer, size_t *lenp, - int (*handler)(void *data, int write, loff_t pos, - void __user *buffer, int len)) -{ - int rc = handler(data, write, *ppos, buffer, *lenp); - - if (rc < 0) - return rc; - - if (write) { - *ppos += *lenp; - } else { - *lenp = rc; - *ppos += rc; - } - return 0; -} -EXPORT_SYMBOL(lprocfs_call_handler); - -static int __proc_dobitmasks(void *data, int write, - loff_t pos, void __user *buffer, int nob) -{ - const int tmpstrlen = 512; - char *tmpstr; - int rc; - unsigned int *mask = data; - int is_subsys = (mask == &libcfs_subsystem_debug) ? 1 : 0; - int is_printk = (mask == &libcfs_printk) ? 1 : 0; - - rc = cfs_trace_allocate_string_buffer(&tmpstr, tmpstrlen); - if (rc < 0) - return rc; - - if (!write) { - libcfs_debug_mask2str(tmpstr, tmpstrlen, *mask, is_subsys); - rc = strlen(tmpstr); - - if (pos >= rc) { - rc = 0; - } else { - rc = cfs_trace_copyout_string(buffer, nob, - tmpstr + pos, "\n"); - } - } else { - rc = cfs_trace_copyin_string(tmpstr, tmpstrlen, buffer, nob); - if (rc < 0) { - kfree(tmpstr); - return rc; - } - - rc = libcfs_debug_str2mask(mask, tmpstr, is_subsys); - /* Always print LBUG/LASSERT to console, so keep this mask */ - if (is_printk) - *mask |= D_EMERG; - } - - kfree(tmpstr); - return rc; -} - -static int proc_dobitmasks(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) -{ - return lprocfs_call_handler(table->data, write, ppos, buffer, lenp, - __proc_dobitmasks); -} - -static int __proc_dump_kernel(void *data, int write, - loff_t pos, void __user *buffer, int nob) -{ - if (!write) - return 0; - - return cfs_trace_dump_debug_buffer_usrstr(buffer, nob); -} - -static int proc_dump_kernel(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) -{ - return lprocfs_call_handler(table->data, write, ppos, buffer, lenp, - __proc_dump_kernel); -} - -static int __proc_daemon_file(void *data, int write, - loff_t pos, void __user *buffer, int nob) -{ - if (!write) { - int len = strlen(cfs_tracefile); - - if (pos >= len) - return 0; - - return cfs_trace_copyout_string(buffer, nob, - cfs_tracefile + pos, "\n"); - } - - return cfs_trace_daemon_command_usrstr(buffer, nob); -} - -static int proc_daemon_file(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) -{ - return lprocfs_call_handler(table->data, write, ppos, buffer, lenp, - __proc_daemon_file); -} - -static int libcfs_force_lbug(struct ctl_table *table, int write, - void __user *buffer, - size_t *lenp, loff_t *ppos) -{ - if (write) - LBUG(); - return 0; -} - -static int proc_fail_loc(struct ctl_table *table, int write, - void __user *buffer, - size_t *lenp, loff_t *ppos) -{ - int rc; - long old_fail_loc = cfs_fail_loc; - - rc = proc_doulongvec_minmax(table, write, buffer, lenp, ppos); - if (old_fail_loc != cfs_fail_loc) - wake_up(&cfs_race_waitq); - return rc; -} - -static int __proc_cpt_table(void *data, int write, - loff_t pos, void __user *buffer, int nob) -{ - char *buf = NULL; - int len = 4096; - int rc = 0; - - if (write) - return -EPERM; - - LASSERT(cfs_cpt_table); - - while (1) { - buf = kzalloc(len, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - rc = cfs_cpt_table_print(cfs_cpt_table, buf, len); - if (rc >= 0) - break; - - if (rc == -EFBIG) { - kfree(buf); - len <<= 1; - continue; - } - goto out; - } - - if (pos >= rc) { - rc = 0; - goto out; - } - - rc = cfs_trace_copyout_string(buffer, nob, buf + pos, NULL); - out: - kfree(buf); - return rc; -} - -static int proc_cpt_table(struct ctl_table *table, int write, - void __user *buffer, size_t *lenp, loff_t *ppos) -{ - return lprocfs_call_handler(table->data, write, ppos, buffer, lenp, - __proc_cpt_table); -} - -static struct ctl_table lnet_table[] = { - { - .procname = "debug", - .data = &libcfs_debug, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dobitmasks, - }, - { - .procname = "subsystem_debug", - .data = &libcfs_subsystem_debug, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dobitmasks, - }, - { - .procname = "printk", - .data = &libcfs_printk, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dobitmasks, - }, - { - .procname = "cpu_partition_table", - .maxlen = 128, - .mode = 0444, - .proc_handler = &proc_cpt_table, - }, - { - .procname = "debug_log_upcall", - .data = lnet_debug_log_upcall, - .maxlen = sizeof(lnet_debug_log_upcall), - .mode = 0644, - .proc_handler = &proc_dostring, - }, - { - .procname = "catastrophe", - .data = &libcfs_catastrophe, - .maxlen = sizeof(int), - .mode = 0444, - .proc_handler = &proc_dointvec, - }, - { - .procname = "dump_kernel", - .maxlen = 256, - .mode = 0200, - .proc_handler = &proc_dump_kernel, - }, - { - .procname = "daemon_file", - .mode = 0644, - .maxlen = 256, - .proc_handler = &proc_daemon_file, - }, - { - .procname = "force_lbug", - .data = NULL, - .maxlen = 0, - .mode = 0200, - .proc_handler = &libcfs_force_lbug - }, - { - .procname = "fail_loc", - .data = &cfs_fail_loc, - .maxlen = sizeof(cfs_fail_loc), - .mode = 0644, - .proc_handler = &proc_fail_loc - }, - { - .procname = "fail_val", - .data = &cfs_fail_val, - .maxlen = sizeof(int), - .mode = 0644, - .proc_handler = &proc_dointvec - }, - { - .procname = "fail_err", - .data = &cfs_fail_err, - .maxlen = sizeof(cfs_fail_err), - .mode = 0644, - .proc_handler = &proc_dointvec, - }, - { - } -}; - -static const struct lnet_debugfs_symlink_def lnet_debugfs_symlinks[] = { - { "console_ratelimit", - "/sys/module/libcfs/parameters/libcfs_console_ratelimit"}, - { "debug_path", - "/sys/module/libcfs/parameters/libcfs_debug_file_path"}, - { "panic_on_lbug", - "/sys/module/libcfs/parameters/libcfs_panic_on_lbug"}, - { "libcfs_console_backoff", - "/sys/module/libcfs/parameters/libcfs_console_backoff"}, - { "debug_mb", - "/sys/module/libcfs/parameters/libcfs_debug_mb"}, - { "console_min_delay_centisecs", - "/sys/module/libcfs/parameters/libcfs_console_min_delay"}, - { "console_max_delay_centisecs", - "/sys/module/libcfs/parameters/libcfs_console_max_delay"}, - {}, -}; - -static ssize_t lnet_debugfs_read(struct file *filp, char __user *buf, - size_t count, loff_t *ppos) -{ - struct ctl_table *table = filp->private_data; - int error; - - error = table->proc_handler(table, 0, (void __user *)buf, &count, ppos); - if (!error) - error = count; - - return error; -} - -static ssize_t lnet_debugfs_write(struct file *filp, const char __user *buf, - size_t count, loff_t *ppos) -{ - struct ctl_table *table = filp->private_data; - int error; - - error = table->proc_handler(table, 1, (void __user *)buf, &count, ppos); - if (!error) - error = count; - - return error; -} - -static const struct file_operations lnet_debugfs_file_operations_rw = { - .open = simple_open, - .read = lnet_debugfs_read, - .write = lnet_debugfs_write, - .llseek = default_llseek, -}; - -static const struct file_operations lnet_debugfs_file_operations_ro = { - .open = simple_open, - .read = lnet_debugfs_read, - .llseek = default_llseek, -}; - -static const struct file_operations lnet_debugfs_file_operations_wo = { - .open = simple_open, - .write = lnet_debugfs_write, - .llseek = default_llseek, -}; - -static const struct file_operations *lnet_debugfs_fops_select(umode_t mode) -{ - if (!(mode & 0222)) - return &lnet_debugfs_file_operations_ro; - - if (!(mode & 0444)) - return &lnet_debugfs_file_operations_wo; - - return &lnet_debugfs_file_operations_rw; -} - -void lustre_insert_debugfs(struct ctl_table *table, - const struct lnet_debugfs_symlink_def *symlinks) -{ - if (!lnet_debugfs_root) - lnet_debugfs_root = debugfs_create_dir("lnet", NULL); - - /* Even if we cannot create, just ignore it altogether) */ - if (IS_ERR_OR_NULL(lnet_debugfs_root)) - return; - - /* We don't save the dentry returned in next two calls, because - * we don't call debugfs_remove() but rather remove_recursive() - */ - for (; table->procname; table++) - debugfs_create_file(table->procname, table->mode, - lnet_debugfs_root, table, - lnet_debugfs_fops_select(table->mode)); - - for (; symlinks && symlinks->name; symlinks++) - debugfs_create_symlink(symlinks->name, lnet_debugfs_root, - symlinks->target); -} -EXPORT_SYMBOL_GPL(lustre_insert_debugfs); - -static void lustre_remove_debugfs(void) -{ - debugfs_remove_recursive(lnet_debugfs_root); - - lnet_debugfs_root = NULL; -} - -static int libcfs_init(void) -{ - int rc; - - rc = libcfs_debug_init(5 * 1024 * 1024); - if (rc < 0) { - pr_err("LustreError: libcfs_debug_init: %d\n", rc); - return rc; - } - - rc = cfs_cpu_init(); - if (rc) - goto cleanup_debug; - - rc = misc_register(&libcfs_dev); - if (rc) { - CERROR("misc_register: error %d\n", rc); - goto cleanup_cpu; - } - - cfs_rehash_wq = alloc_workqueue("cfs_rh", WQ_SYSFS, 4); - if (!cfs_rehash_wq) { - CERROR("Failed to start rehash workqueue.\n"); - rc = -ENOMEM; - goto cleanup_deregister; - } - - rc = cfs_crypto_register(); - if (rc) { - CERROR("cfs_crypto_register: error %d\n", rc); - goto cleanup_deregister; - } - - lustre_insert_debugfs(lnet_table, lnet_debugfs_symlinks); - - CDEBUG(D_OTHER, "portals setup OK\n"); - return 0; - cleanup_deregister: - misc_deregister(&libcfs_dev); -cleanup_cpu: - cfs_cpu_fini(); - cleanup_debug: - libcfs_debug_cleanup(); - return rc; -} - -static void libcfs_exit(void) -{ - int rc; - - lustre_remove_debugfs(); - - if (cfs_rehash_wq) { - destroy_workqueue(cfs_rehash_wq); - cfs_rehash_wq = NULL; - } - - cfs_crypto_unregister(); - - misc_deregister(&libcfs_dev); - - cfs_cpu_fini(); - - rc = libcfs_debug_cleanup(); - if (rc) - pr_err("LustreError: libcfs_debug_cleanup: %d\n", rc); -} - -MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>"); -MODULE_DESCRIPTION("Lustre helper library"); -MODULE_VERSION(LIBCFS_VERSION); -MODULE_LICENSE("GPL"); - -module_init(libcfs_init); -module_exit(libcfs_exit); |