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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,
8 * as published by the Free Software Foundation.
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).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
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 static inline int __is_po2(unsigned long long val
)
47 return !(val
& (val
- 1));
50 #define IS_PO2(val) __is_po2((unsigned long long)(val))
52 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
55 * Lustre Error Checksum: calculates checksum
56 * of Hex number by XORing each bit.
58 #define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
59 ((hexnum) >> 8 & 0xf))
61 #define LUSTRE_SRV_LNET_PID LUSTRE_LNET_PID
63 #include <linux/list.h>
65 int libcfs_arch_init(void);
66 void libcfs_arch_cleanup(void);
68 /* need both kernel and user-land acceptor */
69 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
70 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
73 * libcfs pseudo device operations
75 * It's just draft now.
78 struct cfs_psdev_file
{
81 unsigned long reserved1
;
82 unsigned long reserved2
;
85 struct cfs_psdev_ops
{
86 int (*p_open
)(unsigned long, void *);
87 int (*p_close
)(unsigned long, void *);
88 int (*p_read
)(struct cfs_psdev_file
*, char *, unsigned long);
89 int (*p_write
)(struct cfs_psdev_file
*, char *, unsigned long);
90 int (*p_ioctl
)(struct cfs_psdev_file
*, unsigned long, void *);
94 * Drop into debugger, if possible. Implementation is provided by platform.
97 void cfs_enter_debugger(void);
100 * Defined by platform
102 int unshare_fs_struct(void);
103 sigset_t
cfs_get_blocked_sigs(void);
104 sigset_t
cfs_block_allsigs(void);
105 sigset_t
cfs_block_sigs(unsigned long sigs
);
106 sigset_t
cfs_block_sigsinv(unsigned long sigs
);
107 void cfs_restore_sigs(sigset_t
);
108 int cfs_signal_pending(void);
109 void cfs_clear_sigpending(void);
112 * Random number handling
115 /* returns a random 32-bit integer */
116 unsigned int cfs_rand(void);
117 /* seed the generator */
118 void cfs_srand(unsigned int, unsigned int);
119 void cfs_get_random_bytes(void *buf
, int size
);
121 #include "libcfs_debug.h"
122 #include "libcfs_cpu.h"
123 #include "libcfs_private.h"
124 #include "libcfs_ioctl.h"
125 #include "libcfs_prim.h"
126 #include "libcfs_time.h"
127 #include "libcfs_string.h"
128 #include "libcfs_kernelcomm.h"
129 #include "libcfs_workitem.h"
130 #include "libcfs_hash.h"
131 #include "libcfs_fail.h"
132 #include "libcfs_crypto.h"
134 /* container_of depends on "likely" which is defined in libcfs_private.h */
135 static inline void *__container_of(void *ptr
, unsigned long shift
)
137 if (unlikely(IS_ERR(ptr
) || ptr
== NULL
))
139 return (char *)ptr
- shift
;
142 #define container_of0(ptr, type, member) \
143 ((type *)__container_of((void *)(ptr), offsetof(type, member)))
147 void *libcfs_kvzalloc(size_t size
, gfp_t flags
);
148 void *libcfs_kvzalloc_cpt(struct cfs_cpt_table
*cptab
, int cpt
, size_t size
,
151 #endif /* _LIBCFS_H */