4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * in the LICENSE file that accompanied this code).
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35 #ifndef __LUSTRE_HANDLES_H_
36 #define __LUSTRE_HANDLES_H_
38 /** \defgroup handles handles
43 #if defined(__linux__)
44 #include <linux/lustre_handles.h>
45 #elif defined(__APPLE__)
46 #include <darwin/lustre_handles.h>
47 #elif defined(__WINNT__)
48 #include <winnt/lustre_handles.h>
50 #error Unsupported operating system.
53 #include <libcfs/libcfs.h>
61 struct portals_handle_ops {
62 void (*hop_addref)(void *object);
63 void (*hop_free)(void *object, int size);
66 /* These handles are most easily used by having them appear at the very top of
67 * whatever object that you want to make handles for. ie:
70 * struct portals_handle handle;
74 * Now you're able to assign the results of cookie2handle directly to an
75 * ldlm_lock. If it's not at the top, you'll want to use container_of()
76 * to compute the start of the structure based on the handle field. */
77 struct portals_handle {
80 struct portals_handle_ops *h_ops;
82 /* newly added fields to handle the RCU issue. -jxiong */
85 unsigned int h_size:31;
88 #define RCU2HANDLE(rcu) container_of(rcu, struct portals_handle, h_rcu)
92 /* Add a handle to the hash table */
93 void class_handle_hash(struct portals_handle *,
94 struct portals_handle_ops *ops);
95 void class_handle_unhash(struct portals_handle *);
96 void class_handle_hash_back(struct portals_handle *);
97 void *class_handle2object(__u64 cookie);
98 void class_handle_free_cb(cfs_rcu_head_t *);
99 int class_handle_init(void);
100 void class_handle_cleanup(void);