/* * 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, Whamcloud, Inc. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. */ #define MAX_STRING_SIZE 128 extern cfs_atomic_t ldlm_srv_namespace_nr; extern cfs_atomic_t ldlm_cli_namespace_nr; extern cfs_mutex_t ldlm_srv_namespace_lock; extern cfs_list_t ldlm_srv_namespace_list; extern cfs_mutex_t ldlm_cli_namespace_lock; extern cfs_list_t ldlm_cli_namespace_list; static inline cfs_atomic_t *ldlm_namespace_nr(ldlm_side_t client) { return client == LDLM_NAMESPACE_SERVER ? &ldlm_srv_namespace_nr : &ldlm_cli_namespace_nr; } static inline cfs_list_t *ldlm_namespace_list(ldlm_side_t client) { return client == LDLM_NAMESPACE_SERVER ? &ldlm_srv_namespace_list : &ldlm_cli_namespace_list; } static inline cfs_mutex_t *ldlm_namespace_lock(ldlm_side_t client) { return client == LDLM_NAMESPACE_SERVER ? &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock; } /* ldlm_request.c */ typedef enum { LDLM_ASYNC, LDLM_SYNC, } ldlm_sync_t; /* 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_sync_t sync, int flags); int ldlm_cancel_lru_local(struct ldlm_namespace *ns, cfs_list_t *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 */ cfs_atomic_t restart; cfs_list_t *list; union ldlm_gl_desc *gl_desc; /* glimpse AST descriptor */ }; typedef enum { LDLM_WORK_BL_AST, LDLM_WORK_CP_AST, LDLM_WORK_REVOKE_AST, LDLM_WORK_GL_AST } ldlm_desc_ast_t; void ldlm_grant_lock(struct ldlm_lock *lock, cfs_list_t *work_list); 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); ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **, void *cookie, int *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, cfs_list_t *work_list); #ifdef HAVE_SERVER_SUPPORT int ldlm_reprocess_queue(struct ldlm_resource *res, cfs_list_t *queue, cfs_list_t *work_list); #endif int ldlm_run_ast_work(struct ldlm_namespace *ns, cfs_list_t *rpc_list, 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, cfs_list_t *cancels, int count, int mode); void ldlm_handle_bl_callback(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld, struct ldlm_lock *lock); #ifdef HAVE_SERVER_SUPPORT /* ldlm_plain.c */ int ldlm_process_plain_lock(struct ldlm_lock *lock, int *flags, int first_enq, ldlm_error_t *err, cfs_list_t *work_list); /* ldlm_inodebits.c */ int ldlm_process_inodebits_lock(struct ldlm_lock *lock, int *flags, int first_enq, ldlm_error_t *err, cfs_list_t *work_list); #endif /* ldlm_extent.c */ #ifdef HAVE_SERVER_SUPPORT int ldlm_process_extent_lock(struct ldlm_lock *lock, int *flags, int first_enq, ldlm_error_t *err, cfs_list_t *work_list); #endif 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, int *flags, int first_enq, ldlm_error_t *err, cfs_list_t *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 cfs_proc_dir_entry_t *ldlm_svc_proc_dir; extern cfs_proc_dir_entry_t *ldlm_type_proc_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 cfs_mem_cache_t *ldlm_interval_slab; /* slab cache for ldlm_interval */ extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l); extern struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l); extern struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock); extern 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(!cfs_list_empty(&node->li_group)); lock = cfs_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_PROC_READER(var, type) \ static int lprocfs_rd_##var(char *page, char **start, off_t off, \ int count, int *eof, void *data) \ { \ struct ldlm_pool *pl = data; \ type tmp; \ \ cfs_spin_lock(&pl->pl_lock); \ tmp = pl->pl_##var; \ cfs_spin_unlock(&pl->pl_lock); \ \ return lprocfs_rd_uint(page, start, off, count, eof, &tmp); \ } \ struct __##var##__dummy_read {;} /* semicolon catcher */ #define LDLM_POOL_PROC_WRITER(var, type) \ int lprocfs_wr_##var(struct file *file, const char *buffer, \ unsigned long count, void *data) \ { \ struct ldlm_pool *pl = data; \ type tmp; \ int rc; \ \ rc = lprocfs_wr_uint(file, buffer, count, &tmp); \ if (rc < 0) { \ CERROR("Can't parse user input, rc = %d\n", rc); \ return rc; \ } \ \ cfs_spin_lock(&pl->pl_lock); \ pl->pl_##var = tmp; \ cfs_spin_unlock(&pl->pl_lock); \ \ return rc; \ } \ 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);