diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/ldlm/ldlm_internal.h')
| -rw-r--r-- | drivers/staging/lustre/lustre/ldlm/ldlm_internal.h | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h b/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h new file mode 100644 index 000000000000..141a957462f1 --- /dev/null +++ b/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h @@ -0,0 +1,276 @@ +/* + * 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 atomic_t ldlm_srv_namespace_nr; +extern atomic_t 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_namespace_list; + +static inline atomic_t *ldlm_namespace_nr(ldlm_side_t client) +{ + return client == LDLM_NAMESPACE_SERVER ? + &ldlm_srv_namespace_nr : &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_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; +} + +/* 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 */ +}; + +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, 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, + 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); + + +/* 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 proc_dir_entry_t *ldlm_svc_proc_dir; +extern 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 struct kmem_cache *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(!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_PROC_READER_SEQ_SHOW(var, type) \ + static int lprocfs_##var##_seq_show(struct seq_file *m, void *v) \ + { \ + struct ldlm_pool *pl = m->private; \ + type tmp; \ + \ + spin_lock(&pl->pl_lock); \ + tmp = pl->pl_##var; \ + spin_unlock(&pl->pl_lock); \ + \ + return lprocfs_rd_uint(m, &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; \ + } \ + \ + spin_lock(&pl->pl_lock); \ + pl->pl_##var = tmp; \ + 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); |