X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fobdclass%2Fgenops.c;h=9a9adfa4d409b018e973c10465b30180643a5705;hp=b3f43ba79e5b67c3d51720fa9c117907d91c8a16;hb=e3932b15a2aa2b6e2c99fc7449aba38c3afd526e;hpb=b5b6224b227ca816fc40739741f0c37364db6677 diff --git a/lustre/obdclass/genops.c b/lustre/obdclass/genops.c index b3f43ba..9a9adfa 100644 --- a/lustre/obdclass/genops.c +++ b/lustre/obdclass/genops.c @@ -1,104 +1,163 @@ /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * - * Copyright (c) 2001-2003 Cluster File Systems, Inc. + * GPL HEADER START * - * This file is part of Lustre, http://www.lustre.org. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * - * Lustre is free software; you can redistribute it and/or - * modify it under the terms of version 2 of the GNU General Public - * License as published by the Free Software Foundation. + * 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. * - * Lustre 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 for more details. + * 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 - * along with Lustre; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + * GPL HEADER END + */ +/* + * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. + * Use is subject to license terms. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + * + * lustre/obdclass/genops.c * * These are the only exported functions, they provide some generic * infrastructure for managing object devices */ #define DEBUG_SUBSYSTEM S_CLASS -#ifdef __KERNEL__ -#include /* for request_module() */ -#include -#include -#include -#include -#include -#else +#ifndef __KERNEL__ #include -#include -#include #endif -#include - -extern struct list_head obd_types; -static spinlock_t obd_types_lock = SPIN_LOCK_UNLOCKED; -kmem_cache_t *obdo_cachep = NULL; -kmem_cache_t *import_cachep = NULL; +#include +#include +#include + +extern cfs_list_t obd_types; +cfs_spinlock_t obd_types_lock; + +cfs_mem_cache_t *obd_device_cachep; +cfs_mem_cache_t *obdo_cachep; +EXPORT_SYMBOL(obdo_cachep); +cfs_mem_cache_t *import_cachep; + +cfs_list_t obd_zombie_imports; +cfs_list_t obd_zombie_exports; +cfs_spinlock_t obd_zombie_impexp_lock; +static void obd_zombie_impexp_notify(void); +static void obd_zombie_export_add(struct obd_export *exp); +static void obd_zombie_import_add(struct obd_import *imp); +static void print_export_data(struct obd_export *exp, + const char *status, int locks); int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c); -void (*ptlrpc_abort_inflight_superhack)(struct obd_import *imp); /* * support functions: we could use inter-module communication, but this * is more portable to other OS's */ -static struct obd_type *class_search_type(char *name) +static struct obd_device *obd_device_alloc(void) { - struct list_head *tmp; + struct obd_device *obd; + + OBD_SLAB_ALLOC_PTR_GFP(obd, obd_device_cachep, CFS_ALLOC_IO); + if (obd != NULL) { + obd->obd_magic = OBD_DEVICE_MAGIC; + } + return obd; +} + +static void obd_device_free(struct obd_device *obd) +{ + LASSERT(obd != NULL); + LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "obd %p obd_magic %08x != %08x\n", + obd, obd->obd_magic, OBD_DEVICE_MAGIC); + if (obd->obd_namespace != NULL) { + CERROR("obd %p: namespace %p was not properly cleaned up (obd_force=%d)!\n", + obd, obd->obd_namespace, obd->obd_force); + LBUG(); + } + lu_ref_fini(&obd->obd_reference); + OBD_SLAB_FREE_PTR(obd, obd_device_cachep); +} + +struct obd_type *class_search_type(const char *name) +{ + cfs_list_t *tmp; struct obd_type *type; - spin_lock(&obd_types_lock); - list_for_each(tmp, &obd_types) { - type = list_entry(tmp, struct obd_type, typ_chain); - if (strlen(type->typ_name) == strlen(name) && - strcmp(type->typ_name, name) == 0) { - spin_unlock(&obd_types_lock); + cfs_spin_lock(&obd_types_lock); + cfs_list_for_each(tmp, &obd_types) { + type = cfs_list_entry(tmp, struct obd_type, typ_chain); + if (strcmp(type->typ_name, name) == 0) { + cfs_spin_unlock(&obd_types_lock); return type; } } - spin_unlock(&obd_types_lock); + cfs_spin_unlock(&obd_types_lock); return NULL; } -struct obd_type *class_get_type(char *name) +struct obd_type *class_get_type(const char *name) { struct obd_type *type = class_search_type(name); -#ifdef CONFIG_KMOD +#ifdef HAVE_MODULE_LOADING_SUPPORT if (!type) { - if (!request_module(name)) { - CDEBUG(D_INFO, "Loaded module '%s'\n", name); + const char *modname = name; + if (!cfs_request_module("%s", modname)) { + CDEBUG(D_INFO, "Loaded module '%s'\n", modname); type = class_search_type(name); - } else - CDEBUG(D_INFO, "Can't load module '%s'\n", name); + } else { + LCONSOLE_ERROR_MSG(0x158, "Can't load module '%s'\n", + modname); + } } #endif - if (type) - try_module_get(type->typ_ops->o_owner); + if (type) { + cfs_spin_lock(&type->obd_type_lock); + type->typ_refcnt++; + cfs_try_module_get(type->typ_dt_ops->o_owner); + cfs_spin_unlock(&type->obd_type_lock); + } return type; } void class_put_type(struct obd_type *type) { LASSERT(type); - module_put(type->typ_ops->o_owner); + cfs_spin_lock(&type->obd_type_lock); + type->typ_refcnt--; + cfs_module_put(type->typ_dt_ops->o_owner); + cfs_spin_unlock(&type->obd_type_lock); } -int class_register_type(struct obd_ops *ops, struct md_ops *md_ops, - struct lprocfs_vars *vars, char *name) +#define CLASS_MAX_NAME 1024 + +int class_register_type(struct obd_ops *dt_ops, struct md_ops *md_ops, + struct lprocfs_vars *vars, const char *name, + struct lu_device_type *ldt) { struct obd_type *type; int rc = 0; ENTRY; - LASSERT(strnlen(name, 1024) < 1024); /* sanity check */ + /* sanity check */ + LASSERT(strnlen(name, CLASS_MAX_NAME) < CLASS_MAX_NAME); if (class_search_type(name)) { CDEBUG(D_IOCTL, "Type %s already registered\n", name); @@ -110,49 +169,56 @@ int class_register_type(struct obd_ops *ops, struct md_ops *md_ops, if (type == NULL) RETURN(rc); - OBD_ALLOC(type->typ_ops, sizeof(*type->typ_ops)); + OBD_ALLOC_PTR(type->typ_dt_ops); + OBD_ALLOC_PTR(type->typ_md_ops); OBD_ALLOC(type->typ_name, strlen(name) + 1); - if (md_ops) - OBD_ALLOC(type->typ_md_ops, sizeof(*type->typ_md_ops)); - if (type->typ_ops == NULL || type->typ_name == NULL || - (md_ops && type->typ_md_ops == NULL)) + + if (type->typ_dt_ops == NULL || + type->typ_md_ops == NULL || + type->typ_name == NULL) GOTO (failed, rc); - *(type->typ_ops) = *ops; + *(type->typ_dt_ops) = *dt_ops; + /* md_ops is optional */ if (md_ops) *(type->typ_md_ops) = *md_ops; - else - type->typ_md_ops = NULL; strcpy(type->typ_name, name); + cfs_spin_lock_init(&type->obd_type_lock); #ifdef LPROCFS type->typ_procroot = lprocfs_register(type->typ_name, proc_lustre_root, vars, type); -#endif if (IS_ERR(type->typ_procroot)) { rc = PTR_ERR(type->typ_procroot); type->typ_procroot = NULL; GOTO (failed, rc); } +#endif + if (ldt != NULL) { + type->typ_lu = ldt; + rc = lu_device_type_init(ldt); + if (rc != 0) + GOTO (failed, rc); + } - spin_lock(&obd_types_lock); - list_add(&type->typ_chain, &obd_types); - spin_unlock(&obd_types_lock); + cfs_spin_lock(&obd_types_lock); + cfs_list_add(&type->typ_chain, &obd_types); + cfs_spin_unlock(&obd_types_lock); RETURN (0); failed: if (type->typ_name != NULL) OBD_FREE(type->typ_name, strlen(name) + 1); - if (type->typ_ops != NULL) - OBD_FREE (type->typ_ops, sizeof (*type->typ_ops)); if (type->typ_md_ops != NULL) - OBD_FREE (type->typ_md_ops, sizeof (*type->typ_md_ops)); + OBD_FREE_PTR(type->typ_md_ops); + if (type->typ_dt_ops != NULL) + OBD_FREE_PTR(type->typ_dt_ops); OBD_FREE(type, sizeof(*type)); RETURN(rc); } -int class_unregister_type(char *name) +int class_unregister_type(const char *name) { struct obd_type *type = class_search_type(name); ENTRY; @@ -166,77 +232,185 @@ int class_unregister_type(char *name) CERROR("type %s has refcount (%d)\n", name, type->typ_refcnt); /* This is a bad situation, let's make the best of it */ /* Remove ops, but leave the name for debugging */ - OBD_FREE(type->typ_ops, sizeof(*type->typ_ops)); + OBD_FREE_PTR(type->typ_dt_ops); + OBD_FREE_PTR(type->typ_md_ops); RETURN(-EBUSY); } if (type->typ_procroot) { - lprocfs_remove(type->typ_procroot); - type->typ_procroot = NULL; + lprocfs_remove(&type->typ_procroot); } - spin_lock(&obd_types_lock); - list_del(&type->typ_chain); - spin_unlock(&obd_types_lock); + if (type->typ_lu) + lu_device_type_fini(type->typ_lu); + + cfs_spin_lock(&obd_types_lock); + cfs_list_del(&type->typ_chain); + cfs_spin_unlock(&obd_types_lock); OBD_FREE(type->typ_name, strlen(name) + 1); - if (type->typ_ops != NULL) - OBD_FREE(type->typ_ops, sizeof(*type->typ_ops)); + if (type->typ_dt_ops != NULL) + OBD_FREE_PTR(type->typ_dt_ops); if (type->typ_md_ops != NULL) - OBD_FREE (type->typ_md_ops, sizeof (*type->typ_md_ops)); + OBD_FREE_PTR(type->typ_md_ops); OBD_FREE(type, sizeof(*type)); RETURN(0); } /* class_unregister_type */ -struct obd_device *class_newdev(int *dev) +/** + * Create a new obd device. + * + * Find an empty slot in ::obd_devs[], create a new obd device in it. + * + * \param[in] type_name obd device type string. + * \param[in] name obd device name. + * + * \retval NULL if create fails, otherwise return the obd device + * pointer created. + */ +struct obd_device *class_newdev(const char *type_name, const char *name) { struct obd_device *result = NULL; + struct obd_device *newdev; + struct obd_type *type = NULL; int i; + int new_obd_minor = 0; + + if (strlen(name) >= MAX_OBD_NAME) { + CERROR("name/uuid must be < %u bytes long\n", MAX_OBD_NAME); + RETURN(ERR_PTR(-EINVAL)); + } + + type = class_get_type(type_name); + if (type == NULL){ + CERROR("OBD: unknown type: %s\n", type_name); + RETURN(ERR_PTR(-ENODEV)); + } - for (i = 0 ; i < MAX_OBD_DEVICES ; i++) { - struct obd_device *obd = &obd_dev[i]; - if (!obd->obd_type) { - result = obd; - if (dev) - *dev = i; + newdev = obd_device_alloc(); + if (newdev == NULL) { + class_put_type(type); + RETURN(ERR_PTR(-ENOMEM)); + } + LASSERT(newdev->obd_magic == OBD_DEVICE_MAGIC); + + cfs_spin_lock(&obd_dev_lock); + for (i = 0; i < class_devno_max(); i++) { + struct obd_device *obd = class_num2obd(i); + if (obd && obd->obd_name && + (strcmp(name, obd->obd_name) == 0)) { + CERROR("Device %s already exists, won't add\n", name); + if (result) { + LASSERTF(result->obd_magic == OBD_DEVICE_MAGIC, + "%p obd_magic %08x != %08x\n", result, + result->obd_magic, OBD_DEVICE_MAGIC); + LASSERTF(result->obd_minor == new_obd_minor, + "%p obd_minor %d != %d\n", result, + result->obd_minor, new_obd_minor); + + obd_devs[result->obd_minor] = NULL; + result->obd_name[0]='\0'; + } + result = ERR_PTR(-EEXIST); break; } + if (!result && !obd) { + result = newdev; + result->obd_minor = i; + new_obd_minor = i; + result->obd_type = type; + strncpy(result->obd_name, name, + sizeof(result->obd_name) - 1); + obd_devs[i] = result; + } + } + cfs_spin_unlock(&obd_dev_lock); + + if (result == NULL && i >= class_devno_max()) { + CERROR("all %u OBD devices used, increase MAX_OBD_DEVICES\n", + class_devno_max()); + result = ERR_PTR(-EOVERFLOW); + } + + if (IS_ERR(result)) { + obd_device_free(newdev); + class_put_type(type); + } else { + CDEBUG(D_IOCTL, "Adding new device %s (%p)\n", + result->obd_name, result); } return result; } -int class_name2dev(char *name) +void class_release_dev(struct obd_device *obd) +{ + struct obd_type *obd_type = obd->obd_type; + + LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "%p obd_magic %08x != %08x\n", + obd, obd->obd_magic, OBD_DEVICE_MAGIC); + LASSERTF(obd == obd_devs[obd->obd_minor], "obd %p != obd_devs[%d] %p\n", + obd, obd->obd_minor, obd_devs[obd->obd_minor]); + LASSERT(obd_type != NULL); + + CDEBUG(D_INFO, "Release obd device %s obd_type name =%s\n", + obd->obd_name,obd->obd_type->typ_name); + + cfs_spin_lock(&obd_dev_lock); + obd_devs[obd->obd_minor] = NULL; + cfs_spin_unlock(&obd_dev_lock); + obd_device_free(obd); + + class_put_type(obd_type); +} + +int class_name2dev(const char *name) { int i; if (!name) return -1; - for (i = 0; i < MAX_OBD_DEVICES; i++) { - struct obd_device *obd = &obd_dev[i]; - if (obd->obd_name && strcmp(name, obd->obd_name) == 0) - return i; + cfs_spin_lock(&obd_dev_lock); + for (i = 0; i < class_devno_max(); i++) { + struct obd_device *obd = class_num2obd(i); + if (obd && obd->obd_name && strcmp(name, obd->obd_name) == 0) { + /* Make sure we finished attaching before we give + out any references */ + LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); + if (obd->obd_attached) { + cfs_spin_unlock(&obd_dev_lock); + return i; + } + break; + } } + cfs_spin_unlock(&obd_dev_lock); return -1; } -struct obd_device *class_name2obd(char *name) +struct obd_device *class_name2obd(const char *name) { int dev = class_name2dev(name); - if (dev < 0) + + if (dev < 0 || dev > class_devno_max()) return NULL; - return &obd_dev[dev]; + return class_num2obd(dev); } int class_uuid2dev(struct obd_uuid *uuid) { int i; - for (i = 0; i < MAX_OBD_DEVICES; i++) { - struct obd_device *obd = &obd_dev[i]; - if (obd_uuid_equals(uuid, &obd->obd_uuid)) + cfs_spin_lock(&obd_dev_lock); + for (i = 0; i < class_devno_max(); i++) { + struct obd_device *obd = class_num2obd(i); + if (obd && obd_uuid_equals(uuid, &obd->obd_uuid)) { + LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); + cfs_spin_unlock(&obd_dev_lock); return i; + } } + cfs_spin_unlock(&obd_dev_lock); return -1; } @@ -246,108 +420,228 @@ struct obd_device *class_uuid2obd(struct obd_uuid *uuid) int dev = class_uuid2dev(uuid); if (dev < 0) return NULL; - return &obd_dev[dev]; + return class_num2obd(dev); +} + +/** + * Get obd device from ::obd_devs[] + * + * \param num [in] array index + * + * \retval NULL if ::obd_devs[\a num] does not contains an obd device + * otherwise return the obd device there. + */ +struct obd_device *class_num2obd(int num) +{ + struct obd_device *obd = NULL; + + if (num < class_devno_max()) { + obd = obd_devs[num]; + if (obd == NULL) + return NULL; + + LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, + "%p obd_magic %08x != %08x\n", + obd, obd->obd_magic, OBD_DEVICE_MAGIC); + LASSERTF(obd->obd_minor == num, + "%p obd_minor %0d != %0d\n", + obd, obd->obd_minor, num); + } + + return obd; +} + +void class_obd_list(void) +{ + char *status; + int i; + + cfs_spin_lock(&obd_dev_lock); + for (i = 0; i < class_devno_max(); i++) { + struct obd_device *obd = class_num2obd(i); + if (obd == NULL) + continue; + if (obd->obd_stopping) + status = "ST"; + else if (obd->obd_set_up) + status = "UP"; + else if (obd->obd_attached) + status = "AT"; + else + status = "--"; + LCONSOLE(D_CONFIG, "%3d %s %s %s %s %d\n", + i, status, obd->obd_type->typ_name, + obd->obd_name, obd->obd_uuid.uuid, + cfs_atomic_read(&obd->obd_refcount)); + } + cfs_spin_unlock(&obd_dev_lock); + return; } /* Search for a client OBD connected to tgt_uuid. If grp_uuid is specified, then only the client with that uuid is returned, - otherwise any client connected to the tgt is returned. - If tgt_uuid is NULL, the lov with grp_uuid is returned. */ + otherwise any client connected to the tgt is returned. */ struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid, - char * typ_name, + const char * typ_name, struct obd_uuid *grp_uuid) { int i; - for (i = 0; i < MAX_OBD_DEVICES; i++) { - struct obd_device *obd = &obd_dev[i]; - if (obd->obd_type == NULL) + cfs_spin_lock(&obd_dev_lock); + for (i = 0; i < class_devno_max(); i++) { + struct obd_device *obd = class_num2obd(i); + if (obd == NULL) continue; if ((strncmp(obd->obd_type->typ_name, typ_name, strlen(typ_name)) == 0)) { - struct client_obd *cli = &obd->u.cli; - struct obd_import *imp = cli->cl_import; - if (tgt_uuid == NULL) { - LASSERT(grp_uuid); - if (obd_uuid_equals(grp_uuid, &obd->obd_uuid)) - return obd; - continue; - } - if (obd_uuid_equals(tgt_uuid, &imp->imp_target_uuid) && + if (obd_uuid_equals(tgt_uuid, + &obd->u.cli.cl_target_uuid) && ((grp_uuid)? obd_uuid_equals(grp_uuid, &obd->obd_uuid) : 1)) { + cfs_spin_unlock(&obd_dev_lock); return obd; } } } + cfs_spin_unlock(&obd_dev_lock); return NULL; } /* Iterate the obd_device list looking devices have grp_uuid. Start searching at *next, and if a device is found, the next index to look - it is saved in *next. If next is NULL, then the first matching device + at is saved in *next. If next is NULL, then the first matching device will always be returned. */ struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid, int *next) { int i; - if (next == NULL) + + if (next == NULL) i = 0; - else if (*next >= 0 && *next < MAX_OBD_DEVICES) + else if (*next >= 0 && *next < class_devno_max()) i = *next; - else + else return NULL; - - for (; i < MAX_OBD_DEVICES; i++) { - struct obd_device *obd = &obd_dev[i]; - if (obd->obd_type == NULL) + + cfs_spin_lock(&obd_dev_lock); + for (; i < class_devno_max(); i++) { + struct obd_device *obd = class_num2obd(i); + if (obd == NULL) continue; if (obd_uuid_equals(grp_uuid, &obd->obd_uuid)) { if (next != NULL) *next = i+1; + cfs_spin_unlock(&obd_dev_lock); return obd; } } + cfs_spin_unlock(&obd_dev_lock); return NULL; } +/** + * to notify sptlrpc log for \a fsname has changed, let every relevant OBD + * adjust sptlrpc settings accordingly. + */ +int class_notify_sptlrpc_conf(const char *fsname, int namelen) +{ + struct obd_device *obd; + const char *type; + int i, rc = 0, rc2; + + LASSERT(namelen > 0); + + cfs_spin_lock(&obd_dev_lock); + for (i = 0; i < class_devno_max(); i++) { + obd = class_num2obd(i); + + if (obd == NULL || obd->obd_set_up == 0 || obd->obd_stopping) + continue; + + /* only notify mdc, osc, mdt, ost */ + type = obd->obd_type->typ_name; + if (strcmp(type, LUSTRE_MDC_NAME) != 0 && + strcmp(type, LUSTRE_OSC_NAME) != 0 && + strcmp(type, LUSTRE_MDT_NAME) != 0 && + strcmp(type, LUSTRE_OST_NAME) != 0) + continue; + + if (strncmp(obd->obd_name, fsname, namelen)) + continue; + + class_incref(obd, __FUNCTION__, obd); + cfs_spin_unlock(&obd_dev_lock); + rc2 = obd_set_info_async(obd->obd_self_export, + sizeof(KEY_SPTLRPC_CONF), + KEY_SPTLRPC_CONF, 0, NULL, NULL); + rc = rc ? rc : rc2; + class_decref(obd, __FUNCTION__, obd); + cfs_spin_lock(&obd_dev_lock); + } + cfs_spin_unlock(&obd_dev_lock); + return rc; +} +EXPORT_SYMBOL(class_notify_sptlrpc_conf); void obd_cleanup_caches(void) { int rc; + ENTRY; + if (obd_device_cachep) { + rc = cfs_mem_cache_destroy(obd_device_cachep); + LASSERTF(rc == 0, "Cannot destropy ll_obd_device_cache: rc %d\n", rc); + obd_device_cachep = NULL; + } if (obdo_cachep) { - rc = kmem_cache_destroy(obdo_cachep); - if (rc) - CERROR("Cannot destory ll_obdo_cache\n"); + rc = cfs_mem_cache_destroy(obdo_cachep); + LASSERTF(rc == 0, "Cannot destory ll_obdo_cache\n"); obdo_cachep = NULL; } if (import_cachep) { - rc = kmem_cache_destroy(import_cachep); - if (rc) - CERROR("Cannot destory ll_import_cache\n"); + rc = cfs_mem_cache_destroy(import_cachep); + LASSERTF(rc == 0, "Cannot destory ll_import_cache\n"); import_cachep = NULL; } + if (capa_cachep) { + rc = cfs_mem_cache_destroy(capa_cachep); + LASSERTF(rc == 0, "Cannot destory capa_cache\n"); + capa_cachep = NULL; + } EXIT; } int obd_init_caches(void) { ENTRY; + + LASSERT(obd_device_cachep == NULL); + obd_device_cachep = cfs_mem_cache_create("ll_obd_dev_cache", + sizeof(struct obd_device), + 0, 0); + if (!obd_device_cachep) + GOTO(out, -ENOMEM); + LASSERT(obdo_cachep == NULL); - obdo_cachep = kmem_cache_create("ll_obdo_cache", sizeof(struct obdo), - 0, 0, NULL, NULL); + obdo_cachep = cfs_mem_cache_create("ll_obdo_cache", sizeof(struct obdo), + 0, 0); if (!obdo_cachep) GOTO(out, -ENOMEM); LASSERT(import_cachep == NULL); - import_cachep = kmem_cache_create("ll_import_cache", - sizeof(struct obd_import), - 0, 0, NULL, NULL); + import_cachep = cfs_mem_cache_create("ll_import_cache", + sizeof(struct obd_import), + 0, 0); if (!import_cachep) GOTO(out, -ENOMEM); + LASSERT(capa_cachep == NULL); + capa_cachep = cfs_mem_cache_create("capa_cache", + sizeof(struct obd_capa), 0, 0); + if (!capa_cachep) + GOTO(out, -ENOMEM); + RETURN(0); out: obd_cleanup_caches(); @@ -371,7 +665,7 @@ struct obd_export *class_conn2export(struct lustre_handle *conn) RETURN(NULL); } - CDEBUG(D_IOCTL, "looking for export cookie "LPX64"\n", conn->cookie); + CDEBUG(D_INFO, "looking for export cookie "LPX64"\n", conn->cookie); export = class_handle2object(conn->cookie); RETURN(export); } @@ -412,88 +706,206 @@ struct obd_import *class_conn2cliimp(struct lustre_handle *conn) } /* Export management functions */ +static void class_export_destroy(struct obd_export *exp) +{ + struct obd_device *obd = exp->exp_obd; + ENTRY; + + LASSERT_ATOMIC_ZERO(&exp->exp_refcount); + + CDEBUG(D_IOCTL, "destroying export %p/%s for %s\n", exp, + exp->exp_client_uuid.uuid, obd->obd_name); + + LASSERT(obd != NULL); + + /* "Local" exports (lctl, LOV->{mdc,osc}) have no connection. */ + if (exp->exp_connection) + ptlrpc_put_connection_superhack(exp->exp_connection); + + LASSERT(cfs_list_empty(&exp->exp_outstanding_replies)); + LASSERT(cfs_list_empty(&exp->exp_uncommitted_replies)); + LASSERT(cfs_list_empty(&exp->exp_req_replay_queue)); + LASSERT(cfs_list_empty(&exp->exp_queued_rpc)); + obd_destroy_export(exp); + class_decref(obd, "export", exp); + + OBD_FREE_RCU(exp, sizeof(*exp), &exp->exp_handle); + EXIT; +} + static void export_handle_addref(void *export) { class_export_get(export); } -void __class_export_put(struct obd_export *exp) +struct obd_export *class_export_get(struct obd_export *exp) { - if (atomic_dec_and_test(&exp->exp_refcount)) { - struct obd_device *obd = exp->exp_obd; - CDEBUG(D_IOCTL, "destroying export %p/%s\n", exp, - exp->exp_client_uuid.uuid); + cfs_atomic_inc(&exp->exp_refcount); + CDEBUG(D_INFO, "GETting export %p : new refcount %d\n", exp, + cfs_atomic_read(&exp->exp_refcount)); + return exp; +} +EXPORT_SYMBOL(class_export_get); - LASSERT(obd != NULL); +void class_export_put(struct obd_export *exp) +{ + LASSERT(exp != NULL); + LASSERT_ATOMIC_GT_LT(&exp->exp_refcount, 0, 0x5a5a5a); + CDEBUG(D_INFO, "PUTting export %p : new refcount %d\n", exp, + cfs_atomic_read(&exp->exp_refcount) - 1); - /* "Local" exports (lctl, LOV->{mdc,osc}) have no connection. */ - if (exp->exp_connection) - ptlrpc_put_connection_superhack(exp->exp_connection); + if (cfs_atomic_dec_and_test(&exp->exp_refcount)) { + LASSERT(!cfs_list_empty(&exp->exp_obd_chain)); + CDEBUG(D_IOCTL, "final put %p/%s\n", + exp, exp->exp_client_uuid.uuid); - LASSERT(list_empty(&exp->exp_outstanding_replies)); - LASSERT(list_empty(&exp->exp_handle.h_link)); - obd_destroy_export(exp); + /* release nid stat refererence */ + lprocfs_exp_cleanup(exp); - OBD_FREE(exp, sizeof(*exp)); - if (obd->obd_set_up) { - atomic_dec(&obd->obd_refcount); - wake_up(&obd->obd_refcount_waitq); - } else { - CERROR("removing export %p from obd %s (%p) -- OBD " - "not set up (refcount = %d)\n", exp, - obd->obd_name, obd, - atomic_read(&obd->obd_refcount)); - } + obd_zombie_export_add(exp); } } +EXPORT_SYMBOL(class_export_put); /* Creates a new export, adds it to the hash table, and returns a * pointer to it. The refcount is 2: one for the hash reference, and * one for the pointer returned by this function. */ -struct obd_export *class_new_export(struct obd_device *obd) +struct obd_export *class_new_export(struct obd_device *obd, + struct obd_uuid *cluuid) { struct obd_export *export; + cfs_hash_t *hash = NULL; + int rc = 0; + ENTRY; - OBD_ALLOC(export, sizeof(*export)); - if (!export) { - CERROR("no memory! (minor %d)\n", obd->obd_minor); - return NULL; - } + OBD_ALLOC_PTR(export); + if (!export) + return ERR_PTR(-ENOMEM); export->exp_conn_cnt = 0; - atomic_set(&export->exp_refcount, 2); + export->exp_lock_hash = NULL; + cfs_atomic_set(&export->exp_refcount, 2); + cfs_atomic_set(&export->exp_rpc_count, 0); + cfs_atomic_set(&export->exp_cb_count, 0); + cfs_atomic_set(&export->exp_locks_count, 0); +#if LUSTRE_TRACKS_LOCK_EXP_REFS + CFS_INIT_LIST_HEAD(&export->exp_locks_list); + cfs_spin_lock_init(&export->exp_locks_list_guard); +#endif + cfs_atomic_set(&export->exp_replay_count, 0); export->exp_obd = obd; - INIT_LIST_HEAD(&export->exp_outstanding_replies); - /* XXX this should be in LDLM init */ - INIT_LIST_HEAD(&export->exp_ldlm_data.led_held_locks); - - INIT_LIST_HEAD(&export->exp_handle.h_link); + CFS_INIT_LIST_HEAD(&export->exp_outstanding_replies); + cfs_spin_lock_init(&export->exp_uncommitted_replies_lock); + CFS_INIT_LIST_HEAD(&export->exp_uncommitted_replies); + CFS_INIT_LIST_HEAD(&export->exp_req_replay_queue); + CFS_INIT_LIST_HEAD(&export->exp_handle.h_link); + CFS_INIT_LIST_HEAD(&export->exp_queued_rpc); class_handle_hash(&export->exp_handle, export_handle_addref); - spin_lock_init(&export->exp_lock); + export->exp_last_request_time = cfs_time_current_sec(); + cfs_spin_lock_init(&export->exp_lock); + cfs_spin_lock_init(&export->exp_rpc_lock); + CFS_INIT_HLIST_NODE(&export->exp_uuid_hash); + CFS_INIT_HLIST_NODE(&export->exp_nid_hash); + + export->exp_sp_peer = LUSTRE_SP_ANY; + export->exp_flvr.sf_rpc = SPTLRPC_FLVR_INVALID; + export->exp_client_uuid = *cluuid; + obd_init_export(export); + + cfs_spin_lock(&obd->obd_dev_lock); + /* shouldn't happen, but might race */ + if (obd->obd_stopping) + GOTO(exit_unlock, rc = -ENODEV); + + hash = cfs_hash_getref(obd->obd_uuid_hash); + if (hash == NULL) + GOTO(exit_unlock, rc = -ENODEV); + cfs_spin_unlock(&obd->obd_dev_lock); + + if (!obd_uuid_equals(cluuid, &obd->obd_uuid)) { + rc = cfs_hash_add_unique(hash, cluuid, &export->exp_uuid_hash); + if (rc != 0) { + LCONSOLE_WARN("%s: denying duplicate export for %s, %d\n", + obd->obd_name, cluuid->uuid, rc); + GOTO(exit_err, rc = -EALREADY); + } + } - spin_lock(&obd->obd_dev_lock); - LASSERT(!obd->obd_stopping); /* shouldn't happen, but might race */ - atomic_inc(&obd->obd_refcount); - list_add(&export->exp_obd_chain, &export->exp_obd->obd_exports); + cfs_spin_lock(&obd->obd_dev_lock); + if (obd->obd_stopping) { + cfs_hash_del(hash, cluuid, &export->exp_uuid_hash); + GOTO(exit_unlock, rc = -ENODEV); + } + + class_incref(obd, "export", export); + cfs_list_add(&export->exp_obd_chain, &export->exp_obd->obd_exports); + cfs_list_add_tail(&export->exp_obd_chain_timed, + &export->exp_obd->obd_exports_timed); export->exp_obd->obd_num_exports++; - spin_unlock(&obd->obd_dev_lock); - obd_init_export(export); - return export; + cfs_spin_unlock(&obd->obd_dev_lock); + cfs_hash_putref(hash); + RETURN(export); + +exit_unlock: + cfs_spin_unlock(&obd->obd_dev_lock); +exit_err: + if (hash) + cfs_hash_putref(hash); + class_handle_unhash(&export->exp_handle); + LASSERT(cfs_hlist_unhashed(&export->exp_uuid_hash)); + obd_destroy_export(export); + OBD_FREE_PTR(export); + return ERR_PTR(rc); } +EXPORT_SYMBOL(class_new_export); void class_unlink_export(struct obd_export *exp) { class_handle_unhash(&exp->exp_handle); - spin_lock(&exp->exp_obd->obd_dev_lock); - list_del_init(&exp->exp_obd_chain); - exp->exp_obd->obd_num_exports--; - spin_unlock(&exp->exp_obd->obd_dev_lock); + cfs_spin_lock(&exp->exp_obd->obd_dev_lock); + /* delete an uuid-export hashitem from hashtables */ + if (!cfs_hlist_unhashed(&exp->exp_uuid_hash)) + cfs_hash_del(exp->exp_obd->obd_uuid_hash, + &exp->exp_client_uuid, + &exp->exp_uuid_hash); + cfs_list_move(&exp->exp_obd_chain, &exp->exp_obd->obd_unlinked_exports); + cfs_list_del_init(&exp->exp_obd_chain_timed); + exp->exp_obd->obd_num_exports--; + cfs_spin_unlock(&exp->exp_obd->obd_dev_lock); class_export_put(exp); } +EXPORT_SYMBOL(class_unlink_export); /* Import management functions */ +void class_import_destroy(struct obd_import *imp) +{ + ENTRY; + + CDEBUG(D_IOCTL, "destroying import %p for %s\n", imp, + imp->imp_obd->obd_name); + + LASSERT_ATOMIC_ZERO(&imp->imp_refcount); + + ptlrpc_put_connection_superhack(imp->imp_connection); + + while (!cfs_list_empty(&imp->imp_conn_list)) { + struct obd_import_conn *imp_conn; + + imp_conn = cfs_list_entry(imp->imp_conn_list.next, + struct obd_import_conn, oic_item); + cfs_list_del_init(&imp_conn->oic_item); + ptlrpc_put_connection_superhack(imp_conn->oic_conn); + OBD_FREE(imp_conn, sizeof(*imp_conn)); + } + + LASSERT(imp->imp_sec == NULL); + class_decref(imp->imp_obd, "import", imp); + OBD_FREE_RCU(imp, sizeof(*imp), &imp->imp_handle); + EXIT; +} + static void import_handle_addref(void *import) { class_import_get(import); @@ -501,36 +913,47 @@ static void import_handle_addref(void *import) struct obd_import *class_import_get(struct obd_import *import) { - atomic_inc(&import->imp_refcount); - CDEBUG(D_IOCTL, "import %p refcount=%d\n", import, - atomic_read(&import->imp_refcount)); + cfs_atomic_inc(&import->imp_refcount); + CDEBUG(D_INFO, "import %p refcount=%d obd=%s\n", import, + cfs_atomic_read(&import->imp_refcount), + import->imp_obd->obd_name); return import; } +EXPORT_SYMBOL(class_import_get); -void class_import_put(struct obd_import *import) +void class_import_put(struct obd_import *imp) { ENTRY; - CDEBUG(D_IOCTL, "import %p refcount=%d\n", import, - atomic_read(&import->imp_refcount) - 1); - - LASSERT(atomic_read(&import->imp_refcount) > 0); - LASSERT(atomic_read(&import->imp_refcount) < 0x5a5a5a); - if (!atomic_dec_and_test(&import->imp_refcount)) { - EXIT; - return; - } + LASSERT(cfs_list_empty(&imp->imp_zombie_chain)); + LASSERT_ATOMIC_GE_LT(&imp->imp_refcount, 0, 0x5a5a5a); - CDEBUG(D_IOCTL, "destroying import %p\n", import); + CDEBUG(D_INFO, "import %p refcount=%d obd=%s\n", imp, + cfs_atomic_read(&imp->imp_refcount) - 1, + imp->imp_obd->obd_name); - ptlrpc_put_connection_superhack(import->imp_connection); + if (cfs_atomic_dec_and_test(&imp->imp_refcount)) { + CDEBUG(D_INFO, "final put import %p\n", imp); + obd_zombie_import_add(imp); + } - LASSERT(list_empty(&import->imp_handle.h_link)); - OBD_FREE(import, sizeof(*import)); EXIT; } +EXPORT_SYMBOL(class_import_put); + +static void init_imp_at(struct imp_at *at) { + int i; + at_init(&at->iat_net_latency, 0, 0); + for (i = 0; i < IMP_AT_MAX_PORTALS; i++) { + /* max service estimates are tracked on the server side, so + don't use the AT history here, just use the last reported + val. (But keep hist for proc histogram, worst_ever) */ + at_init(&at->iat_service_estimate[i], INITIAL_CONNECT_TIMEOUT, + AT_FLG_NOHIST); + } +} -struct obd_import *class_new_import(void) +struct obd_import *class_new_import(struct obd_device *obd) { struct obd_import *imp; @@ -538,24 +961,34 @@ struct obd_import *class_new_import(void) if (imp == NULL) return NULL; - INIT_LIST_HEAD(&imp->imp_replay_list); - INIT_LIST_HEAD(&imp->imp_sending_list); - INIT_LIST_HEAD(&imp->imp_delayed_list); - spin_lock_init(&imp->imp_lock); - imp->imp_conn_cnt = 0; - imp->imp_max_transno = 0; - imp->imp_peer_committed_transno = 0; + CFS_INIT_LIST_HEAD(&imp->imp_zombie_chain); + CFS_INIT_LIST_HEAD(&imp->imp_replay_list); + CFS_INIT_LIST_HEAD(&imp->imp_sending_list); + CFS_INIT_LIST_HEAD(&imp->imp_delayed_list); + cfs_spin_lock_init(&imp->imp_lock); + imp->imp_last_success_conn = 0; imp->imp_state = LUSTRE_IMP_NEW; - init_waitqueue_head(&imp->imp_recovery_waitq); - - atomic_set(&imp->imp_refcount, 2); - atomic_set(&imp->imp_inflight, 0); - atomic_set(&imp->imp_replay_inflight, 0); - INIT_LIST_HEAD(&imp->imp_handle.h_link); + imp->imp_obd = class_incref(obd, "import", imp); + cfs_sema_init(&imp->imp_sec_mutex, 1); + cfs_waitq_init(&imp->imp_recovery_waitq); + + cfs_atomic_set(&imp->imp_refcount, 2); + cfs_atomic_set(&imp->imp_unregistering, 0); + cfs_atomic_set(&imp->imp_inflight, 0); + cfs_atomic_set(&imp->imp_replay_inflight, 0); + cfs_atomic_set(&imp->imp_inval_count, 0); + CFS_INIT_LIST_HEAD(&imp->imp_conn_list); + CFS_INIT_LIST_HEAD(&imp->imp_handle.h_link); class_handle_hash(&imp->imp_handle, import_handle_addref); + init_imp_at(&imp->imp_at); + + /* the default magic is V2, will be used in connect RPC, and + * then adjusted according to the flags in request/reply. */ + imp->imp_msg_magic = LUSTRE_MSG_MAGIC_V2; return imp; } +EXPORT_SYMBOL(class_new_import); void class_destroy_import(struct obd_import *import) { @@ -564,15 +997,55 @@ void class_destroy_import(struct obd_import *import) class_handle_unhash(&import->imp_handle); - /* Abort any inflight DLM requests and NULL out their (about to be - * freed) import. */ - /* Invalidate all requests on import, would be better to call - ptlrpc_set_import_active(imp, 0); */ + cfs_spin_lock(&import->imp_lock); import->imp_generation++; - ptlrpc_abort_inflight_superhack(import); - + cfs_spin_unlock(&import->imp_lock); class_import_put(import); } +EXPORT_SYMBOL(class_destroy_import); + +#if LUSTRE_TRACKS_LOCK_EXP_REFS + +void __class_export_add_lock_ref(struct obd_export *exp, struct ldlm_lock *lock) +{ + cfs_spin_lock(&exp->exp_locks_list_guard); + + LASSERT(lock->l_exp_refs_nr >= 0); + + if (lock->l_exp_refs_target != NULL && + lock->l_exp_refs_target != exp) { + LCONSOLE_WARN("setting export %p for lock %p which already has export %p\n", + exp, lock, lock->l_exp_refs_target); + } + if ((lock->l_exp_refs_nr ++) == 0) { + cfs_list_add(&lock->l_exp_refs_link, &exp->exp_locks_list); + lock->l_exp_refs_target = exp; + } + CDEBUG(D_INFO, "lock = %p, export = %p, refs = %u\n", + lock, exp, lock->l_exp_refs_nr); + cfs_spin_unlock(&exp->exp_locks_list_guard); +} +EXPORT_SYMBOL(__class_export_add_lock_ref); + +void __class_export_del_lock_ref(struct obd_export *exp, struct ldlm_lock *lock) +{ + cfs_spin_lock(&exp->exp_locks_list_guard); + LASSERT(lock->l_exp_refs_nr > 0); + if (lock->l_exp_refs_target != exp) { + LCONSOLE_WARN("lock %p, " + "mismatching export pointers: %p, %p\n", + lock, lock->l_exp_refs_target, exp); + } + if (-- lock->l_exp_refs_nr == 0) { + cfs_list_del_init(&lock->l_exp_refs_link); + lock->l_exp_refs_target = NULL; + } + CDEBUG(D_INFO, "lock = %p, export = %p, refs = %u\n", + lock, exp, lock->l_exp_refs_nr); + cfs_spin_unlock(&exp->exp_locks_list_guard); +} +EXPORT_SYMBOL(__class_export_del_lock_ref); +#endif /* A connection defines an export context in which preallocation can be managed. This releases the export pointer reference, and returns @@ -587,26 +1060,62 @@ int class_connect(struct lustre_handle *conn, struct obd_device *obd, LASSERT(cluuid != NULL); ENTRY; - export = class_new_export(obd); - if (export == NULL) - RETURN(-ENOMEM); + export = class_new_export(obd, cluuid); + if (IS_ERR(export)) + RETURN(PTR_ERR(export)); conn->cookie = export->exp_handle.h_cookie; - memcpy(&export->exp_client_uuid, cluuid, - sizeof(export->exp_client_uuid)); class_export_put(export); CDEBUG(D_IOCTL, "connect: client %s, cookie "LPX64"\n", cluuid->uuid, conn->cookie); RETURN(0); } +EXPORT_SYMBOL(class_connect); + +/* if export is involved in recovery then clean up related things */ +void class_export_recovery_cleanup(struct obd_export *exp) +{ + struct obd_device *obd = exp->exp_obd; + + cfs_spin_lock(&obd->obd_recovery_task_lock); + if (exp->exp_delayed) + obd->obd_delayed_clients--; + if (obd->obd_recovering && exp->exp_in_recovery) { + cfs_spin_lock(&exp->exp_lock); + exp->exp_in_recovery = 0; + cfs_spin_unlock(&exp->exp_lock); + LASSERT(obd->obd_connected_clients); + obd->obd_connected_clients--; + } + cfs_spin_unlock(&obd->obd_recovery_task_lock); + /** Cleanup req replay fields */ + if (exp->exp_req_replay_needed) { + cfs_spin_lock(&exp->exp_lock); + exp->exp_req_replay_needed = 0; + cfs_spin_unlock(&exp->exp_lock); + LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients)); + cfs_atomic_dec(&obd->obd_req_replay_clients); + } + /** Cleanup lock replay data */ + if (exp->exp_lock_replay_needed) { + cfs_spin_lock(&exp->exp_lock); + exp->exp_lock_replay_needed = 0; + cfs_spin_unlock(&exp->exp_lock); + LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients)); + cfs_atomic_dec(&obd->obd_lock_replay_clients); + } +} -/* This function removes two references from the export: one for the - * hash entry and one for the export pointer passed in. The export - * pointer passed to this function is destroyed should not be used - * again. */ -int class_disconnect(struct obd_export *export, int flags) +/* This function removes 1-3 references from the export: + * 1 - for export pointer passed + * and if disconnect really need + * 2 - removing from hash + * 3 - in client_unlink_export + * The export pointer passed to this function can destroyed */ +int class_disconnect(struct obd_export *export) { + int already_disconnected; ENTRY; if (export == NULL) { @@ -615,40 +1124,67 @@ int class_disconnect(struct obd_export *export, int flags) RETURN(-EINVAL); } - /* XXX this shouldn't have to be here, but double-disconnect will crash - * otherwise, and sometimes double-disconnect happens. abort_recovery, - * for example. */ - if (list_empty(&export->exp_handle.h_link)) - RETURN(0); + cfs_spin_lock(&export->exp_lock); + already_disconnected = export->exp_disconnected; + export->exp_disconnected = 1; + cfs_spin_unlock(&export->exp_lock); + + /* class_cleanup(), abort_recovery(), and class_fail_export() + * all end up in here, and if any of them race we shouldn't + * call extra class_export_puts(). */ + if (already_disconnected) { + LASSERT(cfs_hlist_unhashed(&export->exp_nid_hash)); + GOTO(no_disconn, already_disconnected); + } CDEBUG(D_IOCTL, "disconnect: cookie "LPX64"\n", export->exp_handle.h_cookie); + if (!cfs_hlist_unhashed(&export->exp_nid_hash)) + cfs_hash_del(export->exp_obd->obd_nid_hash, + &export->exp_connection->c_peer.nid, + &export->exp_nid_hash); + + class_export_recovery_cleanup(export); class_unlink_export(export); +no_disconn: class_export_put(export); RETURN(0); } -void class_disconnect_exports(struct obd_device *obd, int flags) +/* Return non-zero for a fully connected export */ +int class_connected_export(struct obd_export *exp) +{ + if (exp) { + int connected; + cfs_spin_lock(&exp->exp_lock); + connected = (exp->exp_conn_cnt > 0); + cfs_spin_unlock(&exp->exp_lock); + return connected; + } + return 0; +} +EXPORT_SYMBOL(class_connected_export); + +static void class_disconnect_export_list(cfs_list_t *list, + enum obd_option flags) { int rc; - struct list_head *tmp, *n, work_list; - struct lustre_handle fake_conn; - struct obd_export *fake_exp, *exp; + struct obd_export *exp; ENTRY; - /* Move all of the exports from obd_exports to a work list, en masse. */ - spin_lock(&obd->obd_dev_lock); - list_add(&work_list, &obd->obd_exports); - list_del_init(&obd->obd_exports); - spin_unlock(&obd->obd_dev_lock); - - CDEBUG(D_HA, "OBD device %d (%p) has exports, " - "disconnecting them\n", obd->obd_minor, obd); - list_for_each_safe(tmp, n, &work_list) { - exp = list_entry(tmp, struct obd_export, exp_obd_chain); + /* It's possible that an export may disconnect itself, but + * nothing else will be added to this list. */ + while (!cfs_list_empty(list)) { + exp = cfs_list_entry(list->next, struct obd_export, + exp_obd_chain); + /* need for safe call CDEBUG after obd_disconnect */ class_export_get(exp); + cfs_spin_lock(&exp->exp_lock); + exp->exp_flags = flags; + cfs_spin_unlock(&exp->exp_lock); + if (obd_uuid_equals(&exp->exp_client_uuid, &exp->exp_obd->obd_uuid)) { CDEBUG(D_HA, @@ -656,148 +1192,583 @@ void class_disconnect_exports(struct obd_device *obd, int flags) exp); /* Need to delete this now so we don't end up pointing * to work_list later when this export is cleaned up. */ - list_del_init(&exp->exp_obd_chain); + cfs_list_del_init(&exp->exp_obd_chain); class_export_put(exp); continue; } - fake_conn.cookie = exp->exp_handle.h_cookie; - fake_exp = class_conn2export(&fake_conn); - if (!fake_exp) { - class_export_put(exp); - continue; - } - rc = obd_disconnect(fake_exp, flags); + class_export_get(exp); + CDEBUG(D_HA, "%s: disconnecting export at %s (%p), " + "last request at "CFS_TIME_T"\n", + exp->exp_obd->obd_name, obd_export_nid2str(exp), + exp, exp->exp_last_request_time); + /* release one export reference anyway */ + rc = obd_disconnect(exp); + + CDEBUG(D_HA, "disconnected export at %s (%p): rc %d\n", + obd_export_nid2str(exp), exp, rc); class_export_put(exp); - if (rc) { - CDEBUG(D_HA, "disconnecting export %p failed: %d\n", - exp, rc); - } else { - CDEBUG(D_HA, "export %p disconnected\n", exp); - } } EXIT; } -int oig_init(struct obd_io_group **oig_out) +void class_disconnect_exports(struct obd_device *obd) { - struct obd_io_group *oig; + cfs_list_t work_list; ENTRY; - OBD_ALLOC(oig, sizeof(*oig)); - if (oig == NULL) - RETURN(-ENOMEM); + /* Move all of the exports from obd_exports to a work list, en masse. */ + CFS_INIT_LIST_HEAD(&work_list); + cfs_spin_lock(&obd->obd_dev_lock); + cfs_list_splice_init(&obd->obd_exports, &work_list); + cfs_list_splice_init(&obd->obd_delayed_exports, &work_list); + cfs_spin_unlock(&obd->obd_dev_lock); + + if (!cfs_list_empty(&work_list)) { + CDEBUG(D_HA, "OBD device %d (%p) has exports, " + "disconnecting them\n", obd->obd_minor, obd); + class_disconnect_export_list(&work_list, + exp_flags_from_obd(obd)); + } else + CDEBUG(D_HA, "OBD device %d (%p) has no exports\n", + obd->obd_minor, obd); + EXIT; +} +EXPORT_SYMBOL(class_disconnect_exports); - spin_lock_init(&oig->oig_lock); - oig->oig_rc = 0; - oig->oig_pending = 0; - atomic_set(&oig->oig_refcount, 1); - init_waitqueue_head(&oig->oig_waitq); - INIT_LIST_HEAD(&oig->oig_occ_list); +/* Remove exports that have not completed recovery. + */ +void class_disconnect_stale_exports(struct obd_device *obd, + int (*test_export)(struct obd_export *)) +{ + cfs_list_t work_list; + cfs_list_t *pos, *n; + struct obd_export *exp; + int evicted = 0; + ENTRY; - *oig_out = oig; - RETURN(0); + CFS_INIT_LIST_HEAD(&work_list); + cfs_spin_lock(&obd->obd_dev_lock); + cfs_list_for_each_safe(pos, n, &obd->obd_exports) { + exp = cfs_list_entry(pos, struct obd_export, exp_obd_chain); + if (test_export(exp)) + continue; + + /* don't count self-export as client */ + if (obd_uuid_equals(&exp->exp_client_uuid, + &exp->exp_obd->obd_uuid)) + continue; + + cfs_list_move(&exp->exp_obd_chain, &work_list); + evicted++; + CDEBUG(D_ERROR, "%s: disconnect stale client %s@%s\n", + obd->obd_name, exp->exp_client_uuid.uuid, + exp->exp_connection == NULL ? "" : + libcfs_nid2str(exp->exp_connection->c_peer.nid)); + print_export_data(exp, "EVICTING", 0); + } + cfs_spin_unlock(&obd->obd_dev_lock); + + if (evicted) { + CDEBUG(D_HA, "%s: disconnecting %d stale clients\n", + obd->obd_name, evicted); + obd->obd_stale_clients += evicted; + } + class_disconnect_export_list(&work_list, exp_flags_from_obd(obd) | + OBD_OPT_ABORT_RECOV); + EXIT; +} +EXPORT_SYMBOL(class_disconnect_stale_exports); + +void class_fail_export(struct obd_export *exp) +{ + int rc, already_failed; + + cfs_spin_lock(&exp->exp_lock); + already_failed = exp->exp_failed; + exp->exp_failed = 1; + cfs_spin_unlock(&exp->exp_lock); + + if (already_failed) { + CDEBUG(D_HA, "disconnecting dead export %p/%s; skipping\n", + exp, exp->exp_client_uuid.uuid); + return; + } + + CDEBUG(D_HA, "disconnecting export %p/%s\n", + exp, exp->exp_client_uuid.uuid); + + if (obd_dump_on_timeout) + libcfs_debug_dumplog(); + + /* Most callers into obd_disconnect are removing their own reference + * (request, for example) in addition to the one from the hash table. + * We don't have such a reference here, so make one. */ + class_export_get(exp); + rc = obd_disconnect(exp); + if (rc) + CERROR("disconnecting export %p failed: %d\n", exp, rc); + else + CDEBUG(D_HA, "disconnected export %p/%s\n", + exp, exp->exp_client_uuid.uuid); +} +EXPORT_SYMBOL(class_fail_export); + +char *obd_export_nid2str(struct obd_export *exp) +{ + if (exp->exp_connection != NULL) + return libcfs_nid2str(exp->exp_connection->c_peer.nid); + + return "(no nid)"; +} +EXPORT_SYMBOL(obd_export_nid2str); + +int obd_export_evict_by_nid(struct obd_device *obd, const char *nid) +{ + struct obd_export *doomed_exp = NULL; + int exports_evicted = 0; + + lnet_nid_t nid_key = libcfs_str2nid((char *)nid); + + do { + doomed_exp = cfs_hash_lookup(obd->obd_nid_hash, &nid_key); + if (doomed_exp == NULL) + break; + + LASSERTF(doomed_exp->exp_connection->c_peer.nid == nid_key, + "nid %s found, wanted nid %s, requested nid %s\n", + obd_export_nid2str(doomed_exp), + libcfs_nid2str(nid_key), nid); + LASSERTF(doomed_exp != obd->obd_self_export, + "self-export is hashed by NID?\n"); + exports_evicted++; + CWARN("%s: evict NID '%s' (%s) #%d at adminstrative request\n", + obd->obd_name, nid, doomed_exp->exp_client_uuid.uuid, + exports_evicted); + class_fail_export(doomed_exp); + class_export_put(doomed_exp); + } while (1); + + if (!exports_evicted) + CDEBUG(D_HA,"%s: can't disconnect NID '%s': no exports found\n", + obd->obd_name, nid); + return exports_evicted; +} +EXPORT_SYMBOL(obd_export_evict_by_nid); + +int obd_export_evict_by_uuid(struct obd_device *obd, const char *uuid) +{ + struct obd_export *doomed_exp = NULL; + struct obd_uuid doomed_uuid; + int exports_evicted = 0; + + obd_str2uuid(&doomed_uuid, uuid); + if (obd_uuid_equals(&doomed_uuid, &obd->obd_uuid)) { + CERROR("%s: can't evict myself\n", obd->obd_name); + return exports_evicted; + } + + doomed_exp = cfs_hash_lookup(obd->obd_uuid_hash, &doomed_uuid); + + if (doomed_exp == NULL) { + CERROR("%s: can't disconnect %s: no exports found\n", + obd->obd_name, uuid); + } else { + CWARN("%s: evicting %s at adminstrative request\n", + obd->obd_name, doomed_exp->exp_client_uuid.uuid); + class_fail_export(doomed_exp); + class_export_put(doomed_exp); + exports_evicted++; + } + + return exports_evicted; +} +EXPORT_SYMBOL(obd_export_evict_by_uuid); + +#if LUSTRE_TRACKS_LOCK_EXP_REFS +void (*class_export_dump_hook)(struct obd_export*) = NULL; +EXPORT_SYMBOL(class_export_dump_hook); +#endif + +static void print_export_data(struct obd_export *exp, const char *status, + int locks) +{ + struct ptlrpc_reply_state *rs; + struct ptlrpc_reply_state *first_reply = NULL; + int nreplies = 0; + + cfs_spin_lock(&exp->exp_lock); + cfs_list_for_each_entry(rs, &exp->exp_outstanding_replies, + rs_exp_list) { + if (nreplies == 0) + first_reply = rs; + nreplies++; + } + cfs_spin_unlock(&exp->exp_lock); + + CDEBUG(D_HA, "%s: %s %p %s %s %d (%d %d %d) %d %d %d %d: %p %s "LPU64"\n", + exp->exp_obd->obd_name, status, exp, exp->exp_client_uuid.uuid, + obd_export_nid2str(exp), cfs_atomic_read(&exp->exp_refcount), + cfs_atomic_read(&exp->exp_rpc_count), + cfs_atomic_read(&exp->exp_cb_count), + cfs_atomic_read(&exp->exp_locks_count), + exp->exp_disconnected, exp->exp_delayed, exp->exp_failed, + nreplies, first_reply, nreplies > 3 ? "..." : "", + exp->exp_last_committed); +#if LUSTRE_TRACKS_LOCK_EXP_REFS + if (locks && class_export_dump_hook != NULL) + class_export_dump_hook(exp); +#endif +} + +void dump_exports(struct obd_device *obd, int locks) +{ + struct obd_export *exp; + + cfs_spin_lock(&obd->obd_dev_lock); + cfs_list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) + print_export_data(exp, "ACTIVE", locks); + cfs_list_for_each_entry(exp, &obd->obd_unlinked_exports, exp_obd_chain) + print_export_data(exp, "UNLINKED", locks); + cfs_list_for_each_entry(exp, &obd->obd_delayed_exports, exp_obd_chain) + print_export_data(exp, "DELAYED", locks); + cfs_spin_unlock(&obd->obd_dev_lock); + cfs_spin_lock(&obd_zombie_impexp_lock); + cfs_list_for_each_entry(exp, &obd_zombie_exports, exp_obd_chain) + print_export_data(exp, "ZOMBIE", locks); + cfs_spin_unlock(&obd_zombie_impexp_lock); +} +EXPORT_SYMBOL(dump_exports); + +void obd_exports_barrier(struct obd_device *obd) +{ + int waited = 2; + LASSERT(cfs_list_empty(&obd->obd_exports)); + cfs_spin_lock(&obd->obd_dev_lock); + while (!cfs_list_empty(&obd->obd_unlinked_exports)) { + cfs_spin_unlock(&obd->obd_dev_lock); + cfs_schedule_timeout_and_set_state(CFS_TASK_UNINT, + cfs_time_seconds(waited)); + if (waited > 5 && IS_PO2(waited)) { + LCONSOLE_WARN("%s is waiting for obd_unlinked_exports " + "more than %d seconds. " + "The obd refcount = %d. Is it stuck?\n", + obd->obd_name, waited, + cfs_atomic_read(&obd->obd_refcount)); + dump_exports(obd, 1); + } + waited *= 2; + cfs_spin_lock(&obd->obd_dev_lock); + } + cfs_spin_unlock(&obd->obd_dev_lock); +} +EXPORT_SYMBOL(obd_exports_barrier); + +/** + * kill zombie imports and exports + */ +void obd_zombie_impexp_cull(void) +{ + struct obd_import *import; + struct obd_export *export; + ENTRY; + + do { + cfs_spin_lock(&obd_zombie_impexp_lock); + + import = NULL; + if (!cfs_list_empty(&obd_zombie_imports)) { + import = cfs_list_entry(obd_zombie_imports.next, + struct obd_import, + imp_zombie_chain); + cfs_list_del_init(&import->imp_zombie_chain); + } + + export = NULL; + if (!cfs_list_empty(&obd_zombie_exports)) { + export = cfs_list_entry(obd_zombie_exports.next, + struct obd_export, + exp_obd_chain); + cfs_list_del_init(&export->exp_obd_chain); + } + + cfs_spin_unlock(&obd_zombie_impexp_lock); + + if (import != NULL) + class_import_destroy(import); + + if (export != NULL) + class_export_destroy(export); + + cfs_cond_resched(); + } while (import != NULL || export != NULL); + EXIT; +} + +static cfs_completion_t obd_zombie_start; +static cfs_completion_t obd_zombie_stop; +static unsigned long obd_zombie_flags; +static cfs_waitq_t obd_zombie_waitq; +static pid_t obd_zombie_pid; + +enum { + OBD_ZOMBIE_STOP = 1 << 1 }; -static inline void oig_grab(struct obd_io_group *oig) +/** + * check for work for kill zombie import/export thread. + */ +static int obd_zombie_impexp_check(void *arg) +{ + int rc; + + cfs_spin_lock(&obd_zombie_impexp_lock); + rc = cfs_list_empty(&obd_zombie_imports) && + cfs_list_empty(&obd_zombie_exports) && + !cfs_test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags); + + cfs_spin_unlock(&obd_zombie_impexp_lock); + + RETURN(rc); +} + +/** + * Add export to the obd_zombe thread and notify it. + */ +static void obd_zombie_export_add(struct obd_export *exp) { + cfs_spin_lock(&exp->exp_obd->obd_dev_lock); + LASSERT(!cfs_list_empty(&exp->exp_obd_chain)); + cfs_list_del_init(&exp->exp_obd_chain); + cfs_spin_unlock(&exp->exp_obd->obd_dev_lock); + cfs_spin_lock(&obd_zombie_impexp_lock); + cfs_list_add(&exp->exp_obd_chain, &obd_zombie_exports); + cfs_spin_unlock(&obd_zombie_impexp_lock); + + if (obd_zombie_impexp_notify != NULL) + obd_zombie_impexp_notify(); +} + +/** + * Add import to the obd_zombe thread and notify it. + */ +static void obd_zombie_import_add(struct obd_import *imp) { + LASSERT(imp->imp_sec == NULL); + cfs_spin_lock(&obd_zombie_impexp_lock); + LASSERT(cfs_list_empty(&imp->imp_zombie_chain)); + cfs_list_add(&imp->imp_zombie_chain, &obd_zombie_imports); + cfs_spin_unlock(&obd_zombie_impexp_lock); + + if (obd_zombie_impexp_notify != NULL) + obd_zombie_impexp_notify(); +} + +/** + * notify import/export destroy thread about new zombie. + */ +static void obd_zombie_impexp_notify(void) { - atomic_inc(&oig->oig_refcount); + cfs_waitq_signal(&obd_zombie_waitq); } -void oig_release(struct obd_io_group *oig) + +/** + * check whether obd_zombie is idle + */ +static int obd_zombie_is_idle(void) { - if (atomic_dec_and_test(&oig->oig_refcount)) - OBD_FREE(oig, sizeof(*oig)); + int rc; + + LASSERT(!cfs_test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags)); + cfs_spin_lock(&obd_zombie_impexp_lock); + rc = cfs_list_empty(&obd_zombie_imports) && + cfs_list_empty(&obd_zombie_exports); + cfs_spin_unlock(&obd_zombie_impexp_lock); + return rc; } -void oig_add_one(struct obd_io_group *oig, - struct oig_callback_context *occ) +/** + * wait when obd_zombie import/export queues become empty + */ +void obd_zombie_barrier(void) { - unsigned long flags; - CDEBUG(D_CACHE, "oig %p ready to roll\n", oig); - spin_lock_irqsave(&oig->oig_lock, flags); - oig->oig_pending++; - if (occ != NULL) - list_add_tail(&occ->occ_oig_item, &oig->oig_occ_list); - spin_unlock_irqrestore(&oig->oig_lock, flags); - oig_grab(oig); + struct l_wait_info lwi = { 0 }; + + if (obd_zombie_pid == cfs_curproc_pid()) + /* don't wait for myself */ + return; + l_wait_event(obd_zombie_waitq, obd_zombie_is_idle(), &lwi); } +EXPORT_SYMBOL(obd_zombie_barrier); + +#ifdef __KERNEL__ -void oig_complete_one(struct obd_io_group *oig, - struct oig_callback_context *occ, int rc) +/** + * destroy zombie export/import thread. + */ +static int obd_zombie_impexp_thread(void *unused) { - unsigned long flags; - wait_queue_head_t *wake = NULL; - int old_rc; + int rc; - spin_lock_irqsave(&oig->oig_lock, flags); + if ((rc = cfs_daemonize_ctxt("obd_zombid"))) { + cfs_complete(&obd_zombie_start); + RETURN(rc); + } - if (occ != NULL) - list_del_init(&occ->occ_oig_item); + cfs_complete(&obd_zombie_start); - old_rc = oig->oig_rc; - if (oig->oig_rc == 0 && rc != 0) - oig->oig_rc = rc; + obd_zombie_pid = cfs_curproc_pid(); - if (--oig->oig_pending <= 0) - wake = &oig->oig_waitq; + while(!cfs_test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags)) { + struct l_wait_info lwi = { 0 }; - spin_unlock_irqrestore(&oig->oig_lock, flags); + l_wait_event(obd_zombie_waitq, + !obd_zombie_impexp_check(NULL), &lwi); + obd_zombie_impexp_cull(); - CDEBUG(D_CACHE, "oig %p completed, rc %d -> %d via %d, %d now " - "pending (racey)\n", oig, old_rc, oig->oig_rc, rc, - oig->oig_pending); - if (wake) - wake_up(wake); - oig_release(oig); + /* + * Notify obd_zombie_barrier callers that queues + * may be empty. + */ + cfs_waitq_signal(&obd_zombie_waitq); + } + + cfs_complete(&obd_zombie_stop); + + RETURN(0); } -static int oig_done(struct obd_io_group *oig) +#else /* ! KERNEL */ + +static cfs_atomic_t zombie_recur = CFS_ATOMIC_INIT(0); +static void *obd_zombie_impexp_work_cb; +static void *obd_zombie_impexp_idle_cb; + +int obd_zombie_impexp_kill(void *arg) { - unsigned long flags; int rc = 0; - spin_lock_irqsave(&oig->oig_lock, flags); - if (oig->oig_pending <= 0) + + if (cfs_atomic_inc_return(&zombie_recur) == 1) { + obd_zombie_impexp_cull(); rc = 1; - spin_unlock_irqrestore(&oig->oig_lock, flags); + } + cfs_atomic_dec(&zombie_recur); return rc; } -static void interrupted_oig(void *data) +#endif + +/** + * start destroy zombie import/export thread + */ +int obd_zombie_impexp_init(void) { - struct obd_io_group *oig = data; - struct list_head *pos; - struct oig_callback_context *occ; - unsigned long flags; + int rc; - spin_lock_irqsave(&oig->oig_lock, flags); - list_for_each(pos, &oig->oig_occ_list) { - occ = list_entry(pos, struct oig_callback_context, - occ_oig_item); - occ->occ_interrupted(occ); - } - spin_unlock_irqrestore(&oig->oig_lock, flags); + CFS_INIT_LIST_HEAD(&obd_zombie_imports); + CFS_INIT_LIST_HEAD(&obd_zombie_exports); + cfs_spin_lock_init(&obd_zombie_impexp_lock); + cfs_init_completion(&obd_zombie_start); + cfs_init_completion(&obd_zombie_stop); + cfs_waitq_init(&obd_zombie_waitq); + obd_zombie_pid = 0; + +#ifdef __KERNEL__ + rc = cfs_kernel_thread(obd_zombie_impexp_thread, NULL, 0); + if (rc < 0) + RETURN(rc); + + cfs_wait_for_completion(&obd_zombie_start); +#else + + obd_zombie_impexp_work_cb = + liblustre_register_wait_callback("obd_zombi_impexp_kill", + &obd_zombie_impexp_kill, NULL); + + obd_zombie_impexp_idle_cb = + liblustre_register_idle_callback("obd_zombi_impexp_check", + &obd_zombie_impexp_check, NULL); + rc = 0; +#endif + RETURN(rc); +} +/** + * stop destroy zombie import/export thread + */ +void obd_zombie_impexp_stop(void) +{ + cfs_set_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags); + obd_zombie_impexp_notify(); +#ifdef __KERNEL__ + cfs_wait_for_completion(&obd_zombie_stop); +#else + liblustre_deregister_wait_callback(obd_zombie_impexp_work_cb); + liblustre_deregister_idle_callback(obd_zombie_impexp_idle_cb); +#endif } -int oig_wait(struct obd_io_group *oig) +/***** Kernel-userspace comm helpers *******/ + +/* Get length of entire message, including header */ +int kuc_len(int payload_len) { - struct l_wait_info lwi = LWI_INTR(interrupted_oig, oig); - int rc; + return sizeof(struct kuc_hdr) + payload_len; +} +EXPORT_SYMBOL(kuc_len); - CDEBUG(D_CACHE, "waiting for oig %p\n", oig); +/* Get a pointer to kuc header, given a ptr to the payload + * @param p Pointer to payload area + * @returns Pointer to kuc header + */ +struct kuc_hdr * kuc_ptr(void *p) +{ + struct kuc_hdr *lh = ((struct kuc_hdr *)p) - 1; + LASSERT(lh->kuc_magic == KUC_MAGIC); + return lh; +} +EXPORT_SYMBOL(kuc_ptr); - do { - rc = l_wait_event(oig->oig_waitq, oig_done(oig), &lwi); - LASSERTF(rc == 0 || rc == -EINTR, "rc: %d\n", rc); - /* we can't continue until the oig has emptied and stopped - * referencing state that the caller will free upon return */ - if (rc == -EINTR) - lwi = (struct l_wait_info){ 0, }; - } while (rc == -EINTR); +/* Test if payload is part of kuc message + * @param p Pointer to payload area + * @returns boolean + */ +int kuc_ispayload(void *p) +{ + struct kuc_hdr *kh = ((struct kuc_hdr *)p) - 1; + + if (kh->kuc_magic == KUC_MAGIC) + return 1; + else + return 0; +} +EXPORT_SYMBOL(kuc_ispayload); + +/* Alloc space for a message, and fill in header + * @return Pointer to payload area + */ +void *kuc_alloc(int payload_len, int transport, int type) +{ + struct kuc_hdr *lh; + int len = kuc_len(payload_len); + + OBD_ALLOC(lh, len); + if (lh == NULL) + return ERR_PTR(-ENOMEM); - LASSERTF(oig->oig_pending == 0, - "exiting oig_wait(oig = %p) with %d pending\n", oig, - oig->oig_pending); + lh->kuc_magic = KUC_MAGIC; + lh->kuc_transport = transport; + lh->kuc_msgtype = type; + lh->kuc_msglen = len; - CDEBUG(D_CACHE, "done waiting on oig %p rc %d\n", oig, oig->oig_rc); - return oig->oig_rc; + return (void *)(lh + 1); } +EXPORT_SYMBOL(kuc_alloc); + +/* Takes pointer to payload area */ +inline void kuc_free(void *p, int payload_len) +{ + struct kuc_hdr *lh = kuc_ptr(p); + OBD_FREE(lh, kuc_len(payload_len)); +} +EXPORT_SYMBOL(kuc_free); + + +