+/*
+ * 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, 2013, 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;
+extern unsigned int ldlm_cancel_unused_locks_before_replay;
+
+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 */
-int ldlm_cancel_lru(struct ldlm_namespace *ns);
+/* 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 unsigned int ldlm_enqueue_min;
+/* ldlm_resource.c */
+extern struct kmem_cache *ldlm_resource_slab;
+extern struct kmem_cache *ldlm_lock_slab;
+
+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 */
-void ldlm_grant_lock(struct ldlm_lock *lock, void *data, int datalen,
- int run_ast);
+
+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,
- struct lustre_handle *parent_lock_handle, struct ldlm_res_id,
- __u32 type, ldlm_mode_t, ldlm_blocking_callback,
- ldlm_completion_callback, void *data);
+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, int cookie_len, int *flags);
+ 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);
+#ifdef HAVE_SERVER_SUPPORT
+int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
+ struct list_head *work_list);
+#endif
+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_check(struct ldlm_lock *lock,
+ cfs_time_t last_use);
+#define ldlm_lock_remove_from_lru(lock) ldlm_lock_remove_from_lru_check(lock, 0)
+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);
+
+#ifdef HAVE_SERVER_SUPPORT
+/* ldlm_plain.c */
+int ldlm_process_plain_lock(struct ldlm_lock *lock, __u64 *flags,
+ int first_enq, ldlm_error_t *err,
+ struct list_head *work_list);
+
+/* ldlm_inodebits.c */
+int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
+ int first_enq, ldlm_error_t *err,
+ struct list_head *work_list);
+#endif
+
+/* ldlm_extent.c */
+#ifdef HAVE_SERVER_SUPPORT
+int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
+ int first_enq, ldlm_error_t *err,
+ struct list_head *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, __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 proc_dir_entry *ldlm_svc_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_uint_seq_show(m, &tmp); \
+ } \
+ struct __##var##__dummy_read {;} /* semicolon catcher */
+
+#define LDLM_POOL_PROC_WRITER(var, type) \
+ static int lprocfs_wr_##var(struct file *file, \
+ const char __user *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 void
+ldlm_add_var(struct lprocfs_vars *vars, struct proc_dir_entry *proc_dir,
+ const char *name, void *data, const struct file_operations *ops)
+{
+ snprintf((char *)vars->name, MAX_STRING_SIZE, "%s", name);
+ vars->data = data;
+ vars->fops = ops;
+ lprocfs_add_vars(proc_dir, vars, NULL);
+}
+
+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) &&
+ !ldlm_is_cp_reqd(lock))
+ ret = 1;
+ else if (ldlm_is_failed(lock) || ldlm_is_cancel(lock))
+ 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_wire_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);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff