4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
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10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #ifndef __LIBCFS_LIBCFS_H__
38 #define __LIBCFS_LIBCFS_H__
40 #include "linux/libcfs.h"
41 #include <linux/gfp.h>
45 #define LIBCFS_VERSION "0.7.0"
47 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
50 * Lustre Error Checksum: calculates checksum
51 * of Hex number by XORing each bit.
53 #define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
54 ((hexnum) >> 8 & 0xf))
56 #include <linux/list.h>
58 /* need both kernel and user-land acceptor */
59 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
60 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
63 * Drop into debugger, if possible. Implementation is provided by platform.
66 void cfs_enter_debugger(void);
71 int unshare_fs_struct(void);
72 sigset_t cfs_block_allsigs(void);
73 sigset_t cfs_block_sigs(unsigned long sigs);
74 sigset_t cfs_block_sigsinv(unsigned long sigs);
75 void cfs_restore_sigs(sigset_t);
76 int cfs_signal_pending(void);
77 void cfs_clear_sigpending(void);
80 * Random number handling
83 /* returns a random 32-bit integer */
84 unsigned int cfs_rand(void);
85 /* seed the generator */
86 void cfs_srand(unsigned int, unsigned int);
87 void cfs_get_random_bytes(void *buf, int size);
89 #include "libcfs_debug.h"
90 #include "libcfs_cpu.h"
91 #include "libcfs_private.h"
92 #include "libcfs_ioctl.h"
93 #include "libcfs_prim.h"
94 #include "libcfs_time.h"
95 #include "libcfs_string.h"
96 #include "libcfs_workitem.h"
97 #include "libcfs_hash.h"
98 #include "libcfs_fail.h"
100 struct libcfs_ioctl_handler {
101 struct list_head item;
102 int (*handle_ioctl)(unsigned int cmd, struct libcfs_ioctl_hdr *hdr);
105 #define DECLARE_IOCTL_HANDLER(ident, func) \
106 struct libcfs_ioctl_handler ident = { \
107 .item = LIST_HEAD_INIT(ident.item), \
108 .handle_ioctl = func \
111 int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand);
112 int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand);
114 int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp,
115 const struct libcfs_ioctl_hdr __user *uparam);
116 int libcfs_ioctl_data_adjust(struct libcfs_ioctl_data *data);
117 int libcfs_ioctl(unsigned long cmd, void *arg);
119 /* container_of depends on "likely" which is defined in libcfs_private.h */
120 static inline void *__container_of(void *ptr, unsigned long shift)
122 if (IS_ERR_OR_NULL(ptr))
124 return (char *)ptr - shift;
127 #define container_of0(ptr, type, member) \
128 ((type *)__container_of((void *)(ptr), offsetof(type, member)))
132 void *libcfs_kvzalloc(size_t size, gfp_t flags);
133 void *libcfs_kvzalloc_cpt(struct cfs_cpt_table *cptab, int cpt, size_t size,
136 extern struct miscdevice libcfs_dev;
138 * The path of debug log dump upcall script.
140 extern char lnet_upcall[1024];
141 extern char lnet_debug_log_upcall[1024];
143 extern struct cfs_wi_sched *cfs_sched_rehash;
145 struct lnet_debugfs_symlink_def {
150 void lustre_insert_debugfs(struct ctl_table *table,
151 const struct lnet_debugfs_symlink_def *symlinks);
152 int lprocfs_call_handler(void *data, int write, loff_t *ppos,
153 void __user *buffer, size_t *lenp,
154 int (*handler)(void *data, int write,
155 loff_t pos, void __user *buffer, int len));
157 #endif /* _LIBCFS_H */