X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Fobdclass%2Flinux%2Flinux-module.c;fp=lustre%2Fobdclass%2Flinux%2Flinux-module.c;h=0000000000000000000000000000000000000000;hb=6f8d0e2905286cadda1564ace6c2e6b034f0dfd6;hp=464d288731ac4dea070938340a42719948ee5dc2;hpb=8d2655309a80a55a066011a66e7c95f7a0087e9c;p=fs%2Flustre-release.git diff --git a/lustre/obdclass/linux/linux-module.c b/lustre/obdclass/linux/linux-module.c deleted file mode 100644 index 464d288..0000000 --- a/lustre/obdclass/linux/linux-module.c +++ /dev/null @@ -1,735 +0,0 @@ -/* - * 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, 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include -#include -#include -#include -#include - -#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); -}