1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 #ifndef _LUSTRE_DLM_H__
6 #define _LUSTRE_DLM_H__
10 #include <linux/obd_class.h>
11 #include <linux/lustre_net.h>
13 #define OBD_LDLM_DEVICENAME "ldlm"
15 typedef int cluster_host;
16 typedef int cluster_pid;
21 ELDLM_LOCK_CHANGED = 300,
23 ELDLM_NAMESPACE_EXISTS = 400,
24 ELDLM_BAD_NAMESPACE = 401
27 #define LDLM_FL_LOCK_CHANGED (1 << 0)
28 #define LDLM_FL_BLOCK_GRANTED (1 << 1)
29 #define LDLM_FL_BLOCK_CONV (1 << 2)
30 #define LDLM_FL_BLOCK_WAIT (1 << 3)
32 #define L2B(c) (1 << c)
34 /* compatibility matrix */
35 #define LCK_COMPAT_EX L2B(LCK_NL)
36 #define LCK_COMPAT_PW (LCK_COMPAT_EX | L2B(LCK_CR))
37 #define LCK_COMPAT_PR (LCK_COMPAT_PW | L2B(LCK_PR))
38 #define LCK_COMPAT_CW (LCK_COMPAT_PW | L2B(LCK_CW))
39 #define LCK_COMPAT_CR (LCK_COMPAT_CW | L2B(LCK_PR) | L2B(LCK_PW))
40 #define LCK_COMPAT_NL (LCK_COMPAT_CR | L2B(LCK_EX))
42 static ldlm_mode_t lck_compat_array[] = {
43 [LCK_EX] LCK_COMPAT_EX,
44 [LCK_PW] LCK_COMPAT_PW,
45 [LCK_PR] LCK_COMPAT_PR,
46 [LCK_CW] LCK_COMPAT_CW,
47 [LCK_CR] LCK_COMPAT_CR,
48 [LCK_NL] LCK_COMPAT_NL
51 static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
53 if (exist < LCK_EX || exist > LCK_NL)
55 if (new < LCK_EX || new > LCK_NL)
58 return (lck_compat_array[exist] & L2B(new));
67 #define DLM_OST_NAMESPACE 1
68 #define DLM_MDS_NAMESPACE 2
71 - do we just separate this by security domains and use a prefix for
72 multiple namespaces in the same domain?
76 struct ldlm_namespace {
77 struct list_head ns_link; /* in the list of ns's */
78 __u32 ns_id; /* identifier of ns */
79 struct list_head *ns_hash; /* hash table for ns */
80 atomic_t ns_refcount; /* count of resources in the hash */
81 struct list_head ns_root_list; /* all root resources in ns */
82 struct obd_device *ns_obddev;
91 #define RES_HASH_BITS 14
92 #define RES_HASH_SIZE (1UL << RES_HASH_BITS)
93 #define RES_HASH_MASK (RES_HASH_SIZE - 1)
97 typedef int (*ldlm_lock_callback)(struct ldlm_lock *lock, struct ldlm_lock *new,
98 void *data, __u32 data_len);
101 struct ldlm_resource *l_resource;
102 struct ldlm_lock *l_parent;
103 struct list_head l_children;
104 struct list_head l_childof;
105 struct list_head l_res_link; /*position in one of three res lists*/
106 ldlm_mode_t l_req_mode;
107 ldlm_mode_t l_granted_mode;
108 ldlm_lock_callback l_completion_ast;
109 ldlm_lock_callback l_blocking_ast;
110 struct ptlrpc_connection *l_connection;
113 struct ldlm_extent l_extent;
114 struct ldlm_handle l_remote_handle;
116 //XXX cluster_host l_holder;
117 __u32 l_version[RES_VERSION_SIZE];
118 wait_queue_head_t l_waitq;
121 typedef int (*ldlm_res_compat)(struct ldlm_lock *child, struct ldlm_lock *new);
122 typedef int (*ldlm_res_policy)(struct ldlm_resource *parent,
123 struct ldlm_extent *req_ex,
124 struct ldlm_extent *new_ex,
125 ldlm_mode_t mode, void *data);
127 #define LDLM_PLAIN 0x0
128 #define LDLM_EXTENT 0x1
129 #define LDLM_MDSINTENT 0x2
131 #define LDLM_MAX_TYPE 0x2
132 extern ldlm_res_compat ldlm_res_compat_table [];
133 extern ldlm_res_policy ldlm_res_policy_table [];
135 struct ldlm_resource {
136 struct ldlm_namespace *lr_namespace;
137 struct list_head lr_hash;
138 struct list_head lr_rootlink; /* link all root resources in NS */
139 struct ldlm_resource *lr_parent; /* 0 for a root resource */
140 struct list_head lr_children; /* list head for child resources */
141 struct list_head lr_childof; /* part of child list of parent */
143 struct list_head lr_granted;
144 struct list_head lr_converting;
145 struct list_head lr_waiting;
146 ldlm_mode_t lr_most_restr;
147 atomic_t lr_refcount;
148 __u32 lr_type; /* PLAIN, EXTENT, or MDSINTENT */
149 struct ldlm_resource *lr_root;
150 //XXX cluster_host lr_master;
151 __u64 lr_name[RES_NAME_SIZE];
152 __u32 lr_version[RES_VERSION_SIZE];
156 static inline struct ldlm_extent *ldlm_res2extent(struct ldlm_resource *res)
158 return (struct ldlm_extent *)(res->lr_name);
161 static inline void *ldlm_handle2object(struct ldlm_handle *handle)
164 return (void *)(unsigned long)(handle->addr);
168 static inline void ldlm_object2handle(void *object, struct ldlm_handle *handle)
170 handle->addr = (__u64)(unsigned long)object;
173 extern struct list_head ldlm_namespaces;
174 extern spinlock_t ldlm_spinlock;
176 static inline void ldlm_lock(void)
178 spin_lock(&ldlm_spinlock);
181 static inline void ldlm_unlock(void)
183 spin_unlock(&ldlm_spinlock);
186 extern struct obd_ops ldlm_obd_ops;
189 int ldlm_extent_compat(struct ldlm_lock *, struct ldlm_lock *);
190 int ldlm_extent_policy(struct ldlm_resource *, struct ldlm_extent *,
191 struct ldlm_extent *, ldlm_mode_t, void *);
194 void ldlm_lock_free(struct ldlm_lock *lock);
195 void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc);
196 ldlm_error_t ldlm_local_lock_create(__u32 ns_id,
197 struct ldlm_handle *parent_lock_handle,
200 struct ldlm_handle *lockh);
201 ldlm_error_t ldlm_local_lock_enqueue(struct ldlm_handle *lockh,
203 struct ldlm_extent *req_ex,
205 ldlm_lock_callback completion,
206 ldlm_lock_callback blocking,
209 ldlm_error_t ldlm_local_lock_convert(struct ldlm_handle *lockh,
210 int new_mode, int *flags);
211 ldlm_error_t ldlm_local_lock_cancel(struct ldlm_handle *lockh);
212 void ldlm_lock_dump(struct ldlm_lock *lock);
215 int ldlm_test(struct obd_device *device, struct ptlrpc_connection *conn);
218 struct ldlm_namespace *ldlm_namespace_find(__u32 id);
219 ldlm_error_t ldlm_namespace_new(struct obd_device *, __u32 id,
220 struct ldlm_namespace **);
221 int ldlm_namespace_free(struct ldlm_namespace *ns);
222 struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
223 struct ldlm_resource *parent,
224 __u64 *name, __u32 type, int create);
225 int ldlm_resource_put(struct ldlm_resource *res);
226 void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head,
227 struct ldlm_lock *lock);
228 void ldlm_resource_del_lock(struct ldlm_lock *lock);
229 void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc);
230 void ldlm_resource_dump(struct ldlm_resource *res);
233 int ldlm_cli_namespace_new(struct obd_device *, struct ptlrpc_client *,
234 struct ptlrpc_connection *, __u32 ns_id);
235 int ldlm_cli_enqueue(struct ptlrpc_client *cl, struct ptlrpc_connection *peer,
237 struct ldlm_handle *parent_lock_handle,
240 struct ldlm_extent *req_ex,
243 ldlm_lock_callback completion,
244 ldlm_lock_callback blocking,
247 struct ldlm_handle *lockh,
248 struct ptlrpc_request **request);
249 int ldlm_cli_callback(struct ldlm_lock *lock, struct ldlm_lock *new,
250 void *data, __u32 data_len);
251 int ldlm_cli_convert(struct ptlrpc_client *, struct ldlm_handle *,
252 int new_mode, int *flags, struct ptlrpc_request **);
253 int ldlm_cli_cancel(struct ptlrpc_client *, struct ldlm_handle *,
254 struct ptlrpc_request **);
257 #endif /* __KERNEL__ */
259 /* ioctls for trying requests */
260 #define IOC_LDLM_TYPE 'f'
261 #define IOC_LDLM_MIN_NR 40
263 #define IOC_LDLM_TEST _IOWR('f', 40, long)
264 #define IOC_LDLM_MAX_NR 41