| /* |
| * 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) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2011, 2015, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| */ |
| |
| #define DEBUG_SUBSYSTEM S_CLASS |
| # include <linux/atomic.h> |
| |
| #include "../include/obd_support.h" |
| #include "../include/obd_class.h" |
| #include "../../include/linux/lnet/lnetctl.h" |
| #include "../include/lustre_debug.h" |
| #include "../include/lprocfs_status.h" |
| #include <linux/list.h> |
| #include "../include/cl_object.h" |
| #include "llog_internal.h" |
| |
| struct obd_device *obd_devs[MAX_OBD_DEVICES]; |
| EXPORT_SYMBOL(obd_devs); |
| struct list_head obd_types; |
| DEFINE_RWLOCK(obd_dev_lock); |
| |
| /* The following are visible and mutable through /sys/fs/lustre. */ |
| unsigned int obd_debug_peer_on_timeout; |
| EXPORT_SYMBOL(obd_debug_peer_on_timeout); |
| unsigned int obd_dump_on_timeout; |
| EXPORT_SYMBOL(obd_dump_on_timeout); |
| unsigned int obd_dump_on_eviction; |
| EXPORT_SYMBOL(obd_dump_on_eviction); |
| unsigned int obd_max_dirty_pages = 256; |
| EXPORT_SYMBOL(obd_max_dirty_pages); |
| atomic_t obd_unstable_pages; |
| EXPORT_SYMBOL(obd_unstable_pages); |
| atomic_t obd_dirty_pages; |
| EXPORT_SYMBOL(obd_dirty_pages); |
| unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT; /* seconds */ |
| EXPORT_SYMBOL(obd_timeout); |
| unsigned int obd_timeout_set; |
| EXPORT_SYMBOL(obd_timeout_set); |
| /* Adaptive timeout defs here instead of ptlrpc module for /sys/fs/ access */ |
| unsigned int at_min; |
| EXPORT_SYMBOL(at_min); |
| unsigned int at_max = 600; |
| EXPORT_SYMBOL(at_max); |
| unsigned int at_history = 600; |
| EXPORT_SYMBOL(at_history); |
| int at_early_margin = 5; |
| EXPORT_SYMBOL(at_early_margin); |
| int at_extra = 30; |
| EXPORT_SYMBOL(at_extra); |
| |
| atomic_t obd_dirty_transit_pages; |
| EXPORT_SYMBOL(obd_dirty_transit_pages); |
| |
| char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE; |
| EXPORT_SYMBOL(obd_jobid_var); |
| |
| char obd_jobid_node[JOBSTATS_JOBID_SIZE + 1]; |
| |
| /* Get jobid of current process from stored variable or calculate |
| * it from pid and user_id. |
| * |
| * Historically this was also done by reading the environment variable |
| * stored in between the "env_start" & "env_end" of task struct. |
| * This is now deprecated. |
| */ |
| int lustre_get_jobid(char *jobid) |
| { |
| memset(jobid, 0, JOBSTATS_JOBID_SIZE); |
| /* Jobstats isn't enabled */ |
| if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0) |
| return 0; |
| |
| /* Use process name + fsuid as jobid */ |
| if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) { |
| snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u", |
| current_comm(), |
| from_kuid(&init_user_ns, current_fsuid())); |
| return 0; |
| } |
| |
| /* Whole node dedicated to single job */ |
| if (strcmp(obd_jobid_var, JOBSTATS_NODELOCAL) == 0) { |
| strcpy(jobid, obd_jobid_node); |
| return 0; |
| } |
| |
| return -ENOENT; |
| } |
| EXPORT_SYMBOL(lustre_get_jobid); |
| |
| static inline void obd_data2conn(struct lustre_handle *conn, |
| struct obd_ioctl_data *data) |
| { |
| memset(conn, 0, sizeof(*conn)); |
| conn->cookie = data->ioc_cookie; |
| } |
| |
| static inline void obd_conn2data(struct obd_ioctl_data *data, |
| struct lustre_handle *conn) |
| { |
| data->ioc_cookie = conn->cookie; |
| } |
| |
| static int class_resolve_dev_name(__u32 len, const char *name) |
| { |
| int rc; |
| int dev; |
| |
| if (!len || !name) { |
| CERROR("No name passed,!\n"); |
| rc = -EINVAL; |
| goto out; |
| } |
| if (name[len - 1] != 0) { |
| CERROR("Name not nul terminated!\n"); |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| CDEBUG(D_IOCTL, "device name %s\n", name); |
| dev = class_name2dev(name); |
| if (dev == -1) { |
| CDEBUG(D_IOCTL, "No device for name %s!\n", name); |
| rc = -EINVAL; |
| goto out; |
| } |
| |
| CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev); |
| rc = dev; |
| |
| out: |
| return rc; |
| } |
| |
| int class_handle_ioctl(unsigned int cmd, unsigned long arg) |
| { |
| char *buf = NULL; |
| struct obd_ioctl_data *data; |
| struct libcfs_debug_ioctl_data *debug_data; |
| struct obd_device *obd = NULL; |
| int err = 0, len = 0; |
| |
| /* only for debugging */ |
| if (cmd == LIBCFS_IOC_DEBUG_MASK) { |
| debug_data = (struct libcfs_debug_ioctl_data *)arg; |
| libcfs_subsystem_debug = debug_data->subs; |
| libcfs_debug = debug_data->debug; |
| return 0; |
| } |
| |
| CDEBUG(D_IOCTL, "cmd = %x\n", cmd); |
| if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) { |
| CERROR("OBD ioctl: data error\n"); |
| return -EINVAL; |
| } |
| data = (struct obd_ioctl_data *)buf; |
| |
| switch (cmd) { |
| case OBD_IOC_PROCESS_CFG: { |
| struct lustre_cfg *lcfg; |
| |
| if (!data->ioc_plen1 || !data->ioc_pbuf1) { |
| CERROR("No config buffer passed!\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| lcfg = kzalloc(data->ioc_plen1, GFP_NOFS); |
| if (!lcfg) { |
| err = -ENOMEM; |
| goto out; |
| } |
| err = copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1); |
| if (!err) |
| err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1); |
| if (!err) |
| err = class_process_config(lcfg); |
| |
| kfree(lcfg); |
| goto out; |
| } |
| |
| case OBD_GET_VERSION: |
| if (!data->ioc_inlbuf1) { |
| CERROR("No buffer passed in ioctl\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| if (strlen(LUSTRE_VERSION_STRING) + 1 > data->ioc_inllen1) { |
| CERROR("ioctl buffer too small to hold version\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| memcpy(data->ioc_bulk, LUSTRE_VERSION_STRING, |
| strlen(LUSTRE_VERSION_STRING) + 1); |
| |
| err = obd_ioctl_popdata((void __user *)arg, data, len); |
| if (err) |
| err = -EFAULT; |
| goto out; |
| |
| case OBD_IOC_NAME2DEV: { |
| /* Resolve a device name. This does not change the |
| * currently selected device. |
| */ |
| int dev; |
| |
| dev = class_resolve_dev_name(data->ioc_inllen1, |
| data->ioc_inlbuf1); |
| data->ioc_dev = dev; |
| if (dev < 0) { |
| err = -EINVAL; |
| goto out; |
| } |
| |
| err = obd_ioctl_popdata((void __user *)arg, data, |
| sizeof(*data)); |
| if (err) |
| err = -EFAULT; |
| goto out; |
| } |
| |
| case OBD_IOC_UUID2DEV: { |
| /* Resolve a device uuid. This does not change the |
| * currently selected device. |
| */ |
| int dev; |
| struct obd_uuid uuid; |
| |
| if (!data->ioc_inllen1 || !data->ioc_inlbuf1) { |
| CERROR("No UUID passed!\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) { |
| CERROR("UUID not NUL terminated!\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1); |
| obd_str2uuid(&uuid, data->ioc_inlbuf1); |
| dev = class_uuid2dev(&uuid); |
| data->ioc_dev = dev; |
| if (dev == -1) { |
| CDEBUG(D_IOCTL, "No device for UUID %s!\n", |
| data->ioc_inlbuf1); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1, |
| dev); |
| err = obd_ioctl_popdata((void __user *)arg, data, |
| sizeof(*data)); |
| if (err) |
| err = -EFAULT; |
| goto out; |
| } |
| |
| case OBD_IOC_CLOSE_UUID: { |
| CDEBUG(D_IOCTL, "closing all connections to uuid %s (NOOP)\n", |
| data->ioc_inlbuf1); |
| err = 0; |
| goto out; |
| } |
| |
| case OBD_IOC_GETDEVICE: { |
| int index = data->ioc_count; |
| char *status, *str; |
| |
| if (!data->ioc_inlbuf1) { |
| CERROR("No buffer passed in ioctl\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| if (data->ioc_inllen1 < 128) { |
| CERROR("ioctl buffer too small to hold version\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| obd = class_num2obd(index); |
| if (!obd) { |
| err = -ENOENT; |
| goto out; |
| } |
| |
| if (obd->obd_stopping) |
| status = "ST"; |
| else if (obd->obd_set_up) |
| status = "UP"; |
| else if (obd->obd_attached) |
| status = "AT"; |
| else |
| status = "--"; |
| str = (char *)data->ioc_bulk; |
| snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d", |
| (int)index, status, obd->obd_type->typ_name, |
| obd->obd_name, obd->obd_uuid.uuid, |
| atomic_read(&obd->obd_refcount)); |
| err = obd_ioctl_popdata((void __user *)arg, data, len); |
| |
| err = 0; |
| goto out; |
| } |
| } |
| |
| if (data->ioc_dev == OBD_DEV_BY_DEVNAME) { |
| if (data->ioc_inllen4 <= 0 || !data->ioc_inlbuf4) { |
| err = -EINVAL; |
| goto out; |
| } |
| if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME) { |
| err = -EINVAL; |
| goto out; |
| } |
| obd = class_name2obd(data->ioc_inlbuf4); |
| } else if (data->ioc_dev < class_devno_max()) { |
| obd = class_num2obd(data->ioc_dev); |
| } else { |
| CERROR("OBD ioctl: No device\n"); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| if (!obd) { |
| CERROR("OBD ioctl : No Device %d\n", data->ioc_dev); |
| err = -EINVAL; |
| goto out; |
| } |
| LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); |
| |
| if (!obd->obd_set_up || obd->obd_stopping) { |
| CERROR("OBD ioctl: device not setup %d\n", data->ioc_dev); |
| err = -EINVAL; |
| goto out; |
| } |
| |
| switch (cmd) { |
| case OBD_IOC_NO_TRANSNO: { |
| if (!obd->obd_attached) { |
| CERROR("Device %d not attached\n", obd->obd_minor); |
| err = -ENODEV; |
| goto out; |
| } |
| CDEBUG(D_HA, "%s: disabling committed-transno notification\n", |
| obd->obd_name); |
| obd->obd_no_transno = 1; |
| err = 0; |
| goto out; |
| } |
| |
| default: { |
| err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL); |
| if (err) |
| goto out; |
| |
| err = obd_ioctl_popdata((void __user *)arg, data, len); |
| if (err) |
| err = -EFAULT; |
| goto out; |
| } |
| } |
| |
| out: |
| if (buf) |
| obd_ioctl_freedata(buf, len); |
| return err; |
| } /* class_handle_ioctl */ |
| |
| #define OBD_INIT_CHECK |
| static int obd_init_checks(void) |
| { |
| __u64 u64val, div64val; |
| char buf[64]; |
| int len, ret = 0; |
| |
| CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", "%llu", "%lld", "%#llx"); |
| |
| CDEBUG(D_INFO, "OBD_OBJECT_EOF = %#llx\n", (__u64)OBD_OBJECT_EOF); |
| |
| u64val = OBD_OBJECT_EOF; |
| CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val); |
| if (u64val != OBD_OBJECT_EOF) { |
| CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n", |
| u64val, (int)sizeof(u64val)); |
| ret = -EINVAL; |
| } |
| len = snprintf(buf, sizeof(buf), "%#llx", u64val); |
| if (len != 18) { |
| CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len); |
| ret = -EINVAL; |
| } |
| |
| div64val = OBD_OBJECT_EOF; |
| CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = %#llx\n", u64val); |
| if (u64val != OBD_OBJECT_EOF) { |
| CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n", |
| u64val, (int)sizeof(u64val)); |
| ret = -EOVERFLOW; |
| } |
| if (u64val >> 8 != OBD_OBJECT_EOF >> 8) { |
| CERROR("__u64 %#llx(%d) != 0xffffffffffffffff\n", |
| u64val, (int)sizeof(u64val)); |
| return -EOVERFLOW; |
| } |
| if (do_div(div64val, 256) != (u64val & 255)) { |
| CERROR("do_div(%#llx,256) != %llu\n", u64val, u64val & 255); |
| return -EOVERFLOW; |
| } |
| if (u64val >> 8 != div64val) { |
| CERROR("do_div(%#llx,256) %llu != %llu\n", |
| u64val, div64val, u64val >> 8); |
| return -EOVERFLOW; |
| } |
| len = snprintf(buf, sizeof(buf), "%#llx", u64val); |
| if (len != 18) { |
| CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len); |
| ret = -EINVAL; |
| } |
| len = snprintf(buf, sizeof(buf), "%llu", u64val); |
| if (len != 20) { |
| CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len); |
| ret = -EINVAL; |
| } |
| len = snprintf(buf, sizeof(buf), "%lld", u64val); |
| if (len != 2) { |
| CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len); |
| ret = -EINVAL; |
| } |
| if ((u64val & ~PAGE_MASK) >= PAGE_SIZE) { |
| CWARN("mask failed: u64val %llu >= %llu\n", u64val, |
| (__u64)PAGE_SIZE); |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| extern int class_procfs_init(void); |
| extern int class_procfs_clean(void); |
| |
| static int __init obdclass_init(void) |
| { |
| int i, err; |
| |
| int lustre_register_fs(void); |
| |
| LCONSOLE_INFO("Lustre: Build Version: " LUSTRE_VERSION_STRING "\n"); |
| |
| spin_lock_init(&obd_types_lock); |
| obd_zombie_impexp_init(); |
| |
| err = obd_init_checks(); |
| if (err == -EOVERFLOW) |
| return err; |
| |
| class_init_uuidlist(); |
| err = class_handle_init(); |
| if (err) |
| return err; |
| |
| INIT_LIST_HEAD(&obd_types); |
| |
| err = misc_register(&obd_psdev); |
| if (err) { |
| CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err); |
| return err; |
| } |
| |
| /* This struct is already zeroed for us (static global) */ |
| for (i = 0; i < class_devno_max(); i++) |
| obd_devs[i] = NULL; |
| |
| /* Default the dirty page cache cap to 1/2 of system memory. |
| * For clients with less memory, a larger fraction is needed |
| * for other purposes (mostly for BGL). |
| */ |
| if (totalram_pages <= 512 << (20 - PAGE_SHIFT)) |
| obd_max_dirty_pages = totalram_pages / 4; |
| else |
| obd_max_dirty_pages = totalram_pages / 2; |
| |
| err = obd_init_caches(); |
| if (err) |
| return err; |
| |
| err = class_procfs_init(); |
| if (err) |
| return err; |
| |
| err = obd_sysctl_init(); |
| if (err) |
| return err; |
| |
| err = lu_global_init(); |
| if (err) |
| return err; |
| |
| err = cl_global_init(); |
| if (err != 0) |
| return err; |
| |
| err = llog_info_init(); |
| if (err) |
| return err; |
| |
| err = lustre_register_fs(); |
| |
| return err; |
| } |
| |
| static void obdclass_exit(void) |
| { |
| int i; |
| |
| int lustre_unregister_fs(void); |
| |
| lustre_unregister_fs(); |
| |
| misc_deregister(&obd_psdev); |
| for (i = 0; i < class_devno_max(); i++) { |
| struct obd_device *obd = class_num2obd(i); |
| |
| if (obd && obd->obd_set_up && |
| OBT(obd) && OBP(obd, detach)) { |
| /* XXX should this call generic detach otherwise? */ |
| LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); |
| OBP(obd, detach)(obd); |
| } |
| } |
| llog_info_fini(); |
| cl_global_fini(); |
| lu_global_fini(); |
| |
| obd_cleanup_caches(); |
| |
| class_procfs_clean(); |
| |
| class_handle_cleanup(); |
| class_exit_uuidlist(); |
| obd_zombie_impexp_stop(); |
| } |
| |
| MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>"); |
| MODULE_DESCRIPTION("Lustre Class Driver"); |
| MODULE_VERSION(LUSTRE_VERSION_STRING); |
| MODULE_LICENSE("GPL"); |
| |
| module_init(obdclass_init); |
| module_exit(obdclass_exit); |