| /* |
| * 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.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) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2011, 2012, Intel Corporation. |
| */ |
| /* |
| * This file is part of Lustre, http://www.lustre.org/ |
| * Lustre is a trademark of Sun Microsystems, Inc. |
| */ |
| |
| #define MAX_STRING_SIZE 128 |
| |
| extern int ldlm_srv_namespace_nr; |
| extern int ldlm_cli_namespace_nr; |
| extern struct mutex ldlm_srv_namespace_lock; |
| extern struct list_head ldlm_srv_namespace_list; |
| extern struct mutex ldlm_cli_namespace_lock; |
| extern struct list_head ldlm_cli_active_namespace_list; |
| extern struct list_head ldlm_cli_inactive_namespace_list; |
| |
| static inline int ldlm_namespace_nr_read(ldlm_side_t client) |
| { |
| return client == LDLM_NAMESPACE_SERVER ? |
| ldlm_srv_namespace_nr : ldlm_cli_namespace_nr; |
| } |
| |
| static inline void ldlm_namespace_nr_inc(ldlm_side_t client) |
| { |
| if (client == LDLM_NAMESPACE_SERVER) |
| ldlm_srv_namespace_nr++; |
| else |
| ldlm_cli_namespace_nr++; |
| } |
| |
| static inline void ldlm_namespace_nr_dec(ldlm_side_t client) |
| { |
| if (client == LDLM_NAMESPACE_SERVER) |
| ldlm_srv_namespace_nr--; |
| else |
| ldlm_cli_namespace_nr--; |
| } |
| |
| static inline struct list_head *ldlm_namespace_list(ldlm_side_t client) |
| { |
| return client == LDLM_NAMESPACE_SERVER ? |
| &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list; |
| } |
| |
| static inline struct list_head *ldlm_namespace_inactive_list(ldlm_side_t client) |
| { |
| return client == LDLM_NAMESPACE_SERVER ? |
| &ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list; |
| } |
| |
| static inline struct mutex *ldlm_namespace_lock(ldlm_side_t client) |
| { |
| return client == LDLM_NAMESPACE_SERVER ? |
| &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock; |
| } |
| |
| /* ns_bref is the number of resources in this namespace */ |
| static inline int ldlm_ns_empty(struct ldlm_namespace *ns) |
| { |
| return atomic_read(&ns->ns_bref) == 0; |
| } |
| |
| void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *, ldlm_side_t); |
| void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *, |
| ldlm_side_t); |
| struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t); |
| |
| /* ldlm_request.c */ |
| /* Cancel lru flag, it indicates we cancel aged locks. */ |
| enum { |
| LDLM_CANCEL_AGED = 1 << 0, /* Cancel aged locks (non lru resize). */ |
| LDLM_CANCEL_PASSED = 1 << 1, /* Cancel passed number of locks. */ |
| LDLM_CANCEL_SHRINK = 1 << 2, /* Cancel locks from shrinker. */ |
| LDLM_CANCEL_LRUR = 1 << 3, /* Cancel locks from lru resize. */ |
| LDLM_CANCEL_NO_WAIT = 1 << 4 /* Cancel locks w/o blocking (neither |
| * sending nor waiting for any rpcs) */ |
| }; |
| |
| int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr, |
| ldlm_cancel_flags_t sync, int flags); |
| int ldlm_cancel_lru_local(struct ldlm_namespace *ns, |
| struct list_head *cancels, int count, int max, |
| ldlm_cancel_flags_t cancel_flags, int flags); |
| extern int ldlm_enqueue_min; |
| int ldlm_get_enq_timeout(struct ldlm_lock *lock); |
| |
| /* ldlm_resource.c */ |
| int ldlm_resource_putref_locked(struct ldlm_resource *res); |
| void ldlm_resource_insert_lock_after(struct ldlm_lock *original, |
| struct ldlm_lock *new); |
| void ldlm_namespace_free_prior(struct ldlm_namespace *ns, |
| struct obd_import *imp, int force); |
| void ldlm_namespace_free_post(struct ldlm_namespace *ns); |
| /* ldlm_lock.c */ |
| |
| struct ldlm_cb_set_arg { |
| struct ptlrpc_request_set *set; |
| int type; /* LDLM_{CP,BL,GL}_CALLBACK */ |
| atomic_t restart; |
| struct list_head *list; |
| union ldlm_gl_desc *gl_desc; /* glimpse AST descriptor */ |
| }; |
| |
| enum ldlm_desc_ast_t { |
| LDLM_WORK_BL_AST, |
| LDLM_WORK_CP_AST, |
| LDLM_WORK_REVOKE_AST, |
| LDLM_WORK_GL_AST |
| }; |
| |
| void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list); |
| int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill, |
| enum req_location loc, void *data, int size); |
| struct ldlm_lock * |
| ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *, |
| ldlm_type_t type, ldlm_mode_t, |
| const struct ldlm_callback_suite *cbs, |
| void *data, __u32 lvb_len, enum lvb_type lvb_type); |
| ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **, |
| void *cookie, __u64 *flags); |
| void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode); |
| void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, __u32 mode); |
| void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode); |
| void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, __u32 mode); |
| void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new, |
| struct list_head *work_list); |
| int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list, |
| enum ldlm_desc_ast_t ast_type); |
| int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq); |
| int ldlm_lock_remove_from_lru(struct ldlm_lock *lock); |
| int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock); |
| void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock); |
| void ldlm_lock_add_to_lru(struct ldlm_lock *lock); |
| void ldlm_lock_touch_in_lru(struct ldlm_lock *lock); |
| void ldlm_lock_destroy_nolock(struct ldlm_lock *lock); |
| |
| void ldlm_cancel_locks_for_export(struct obd_export *export); |
| |
| /* ldlm_lockd.c */ |
| int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld, |
| struct ldlm_lock *lock); |
| int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, |
| struct ldlm_lock_desc *ld, |
| struct list_head *cancels, int count, |
| ldlm_cancel_flags_t cancel_flags); |
| |
| void ldlm_handle_bl_callback(struct ldlm_namespace *ns, |
| struct ldlm_lock_desc *ld, struct ldlm_lock *lock); |
| |
| extern struct kmem_cache *ldlm_resource_slab; |
| |
| /* ldlm_lockd.c & ldlm_lock.c */ |
| extern struct kmem_cache *ldlm_lock_slab; |
| |
| /* ldlm_extent.c */ |
| void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock); |
| void ldlm_extent_unlink_lock(struct ldlm_lock *lock); |
| |
| /* ldlm_flock.c */ |
| int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags, |
| int first_enq, ldlm_error_t *err, |
| struct list_head *work_list); |
| int ldlm_init_flock_export(struct obd_export *exp); |
| void ldlm_destroy_flock_export(struct obd_export *exp); |
| |
| /* l_lock.c */ |
| void l_check_ns_lock(struct ldlm_namespace *ns); |
| void l_check_no_ns_lock(struct ldlm_namespace *ns); |
| |
| extern struct dentry *ldlm_svc_debugfs_dir; |
| |
| struct ldlm_state { |
| struct ptlrpc_service *ldlm_cb_service; |
| struct ptlrpc_service *ldlm_cancel_service; |
| struct ptlrpc_client *ldlm_client; |
| struct ptlrpc_connection *ldlm_server_conn; |
| struct ldlm_bl_pool *ldlm_bl_pool; |
| }; |
| |
| /* interval tree, for LDLM_EXTENT. */ |
| extern struct kmem_cache *ldlm_interval_slab; /* slab cache for ldlm_interval */ |
| extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l); |
| struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l); |
| struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock); |
| void ldlm_interval_free(struct ldlm_interval *node); |
| /* this function must be called with res lock held */ |
| static inline struct ldlm_extent * |
| ldlm_interval_extent(struct ldlm_interval *node) |
| { |
| struct ldlm_lock *lock; |
| |
| LASSERT(!list_empty(&node->li_group)); |
| |
| lock = list_entry(node->li_group.next, struct ldlm_lock, |
| l_sl_policy); |
| return &lock->l_policy_data.l_extent; |
| } |
| |
| int ldlm_init(void); |
| void ldlm_exit(void); |
| |
| enum ldlm_policy_res { |
| LDLM_POLICY_CANCEL_LOCK, |
| LDLM_POLICY_KEEP_LOCK, |
| LDLM_POLICY_SKIP_LOCK |
| }; |
| |
| typedef enum ldlm_policy_res ldlm_policy_res_t; |
| |
| #define LDLM_POOL_SYSFS_PRINT_int(v) sprintf(buf, "%d\n", v) |
| #define LDLM_POOL_SYSFS_SET_int(a, b) { a = b; } |
| #define LDLM_POOL_SYSFS_PRINT_u64(v) sprintf(buf, "%lld\n", v) |
| #define LDLM_POOL_SYSFS_SET_u64(a, b) { a = b; } |
| #define LDLM_POOL_SYSFS_PRINT_atomic(v) sprintf(buf, "%d\n", atomic_read(&v)) |
| #define LDLM_POOL_SYSFS_SET_atomic(a, b) atomic_set(&a, b) |
| |
| #define LDLM_POOL_SYSFS_READER_SHOW(var, type) \ |
| static ssize_t var##_show(struct kobject *kobj, \ |
| struct attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \ |
| pl_kobj); \ |
| type tmp; \ |
| \ |
| spin_lock(&pl->pl_lock); \ |
| tmp = pl->pl_##var; \ |
| spin_unlock(&pl->pl_lock); \ |
| \ |
| return LDLM_POOL_SYSFS_PRINT_##type(tmp); \ |
| } \ |
| struct __##var##__dummy_read {; } /* semicolon catcher */ |
| |
| #define LDLM_POOL_SYSFS_WRITER_STORE(var, type) \ |
| static ssize_t var##_store(struct kobject *kobj, \ |
| struct attribute *attr, \ |
| const char *buffer, \ |
| size_t count) \ |
| { \ |
| struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \ |
| pl_kobj); \ |
| unsigned long tmp; \ |
| int rc; \ |
| \ |
| rc = kstrtoul(buffer, 10, &tmp); \ |
| if (rc < 0) { \ |
| return rc; \ |
| } \ |
| \ |
| spin_lock(&pl->pl_lock); \ |
| LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \ |
| spin_unlock(&pl->pl_lock); \ |
| \ |
| return count; \ |
| } \ |
| struct __##var##__dummy_write {; } /* semicolon catcher */ |
| |
| #define LDLM_POOL_SYSFS_READER_NOLOCK_SHOW(var, type) \ |
| static ssize_t var##_show(struct kobject *kobj, \ |
| struct attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \ |
| pl_kobj); \ |
| \ |
| return LDLM_POOL_SYSFS_PRINT_##type(pl->pl_##var); \ |
| } \ |
| struct __##var##__dummy_read {; } /* semicolon catcher */ |
| |
| #define LDLM_POOL_SYSFS_WRITER_NOLOCK_STORE(var, type) \ |
| static ssize_t var##_store(struct kobject *kobj, \ |
| struct attribute *attr, \ |
| const char *buffer, \ |
| size_t count) \ |
| { \ |
| struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \ |
| pl_kobj); \ |
| unsigned long tmp; \ |
| int rc; \ |
| \ |
| rc = kstrtoul(buffer, 10, &tmp); \ |
| if (rc < 0) { \ |
| return rc; \ |
| } \ |
| \ |
| LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \ |
| \ |
| return count; \ |
| } \ |
| struct __##var##__dummy_write {; } /* semicolon catcher */ |
| |
| static inline int is_granted_or_cancelled(struct ldlm_lock *lock) |
| { |
| int ret = 0; |
| |
| lock_res_and_lock(lock); |
| if (((lock->l_req_mode == lock->l_granted_mode) && |
| !(lock->l_flags & LDLM_FL_CP_REQD)) || |
| (lock->l_flags & (LDLM_FL_FAILED | LDLM_FL_CANCEL))) |
| ret = 1; |
| unlock_res_and_lock(lock); |
| |
| return ret; |
| } |
| |
| typedef void (*ldlm_policy_wire_to_local_t)(const ldlm_wire_policy_data_t *, |
| ldlm_policy_data_t *); |
| |
| typedef void (*ldlm_policy_local_to_wire_t)(const ldlm_policy_data_t *, |
| ldlm_wire_policy_data_t *); |
| |
| void ldlm_plain_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy, |
| ldlm_policy_data_t *lpolicy); |
| void ldlm_plain_policy_local_to_wire(const ldlm_policy_data_t *lpolicy, |
| ldlm_wire_policy_data_t *wpolicy); |
| void ldlm_ibits_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy, |
| ldlm_policy_data_t *lpolicy); |
| void ldlm_ibits_policy_local_to_wire(const ldlm_policy_data_t *lpolicy, |
| ldlm_wire_policy_data_t *wpolicy); |
| void ldlm_extent_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy, |
| ldlm_policy_data_t *lpolicy); |
| void ldlm_extent_policy_local_to_wire(const ldlm_policy_data_t *lpolicy, |
| ldlm_wire_policy_data_t *wpolicy); |
| void ldlm_flock_policy_wire18_to_local(const ldlm_wire_policy_data_t *wpolicy, |
| ldlm_policy_data_t *lpolicy); |
| void ldlm_flock_policy_wire21_to_local(const ldlm_wire_policy_data_t *wpolicy, |
| ldlm_policy_data_t *lpolicy); |
| |
| void ldlm_flock_policy_local_to_wire(const ldlm_policy_data_t *lpolicy, |
| ldlm_wire_policy_data_t *wpolicy); |