drivers/staging/lustre/include/linux/libcfs/libcfs.h

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   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.
   9  *
  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).
  15  *
  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
  19  *
  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
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #ifndef __LIBCFS_LIBCFS_H__
  38 #define __LIBCFS_LIBCFS_H__
  39
  40 #if !__GNUC__
  41 #define __attribute__(x)
  42 #endif
  43
  44 #include "linux/libcfs.h"
  45 #include <linux/gfp.h>
  46
  47 #include "curproc.h"
  48
  49 #ifndef offsetof
  50 # define offsetof(typ,memb) ((long)(long_ptr_t)((char *)&(((typ *)0)->memb)))
  51 #endif
  52
  53 #ifndef ARRAY_SIZE
  54 #define ARRAY_SIZE(a) ((sizeof (a)) / (sizeof ((a)[0])))
  55 #endif
  56
  57 #if !defined(swap)
  58 #define swap(x,y) do { typeof(x) z = x; x = y; y = z; } while (0)
  59 #endif
  60
  61 #if !defined(container_of)
  62 /* given a pointer @ptr to the field @member embedded into type (usually
  63  * struct) @type, return pointer to the embedding instance of @type. */
  64 #define container_of(ptr, type, member) \
  65         ((type *)((char *)(ptr)-(char *)(&((type *)0)->member)))
  66 #endif
  67
  68 static inline int __is_po2(unsigned long long val)
  69 {
  70         return !(val & (val - 1));
  71 }
  72
  73 #define IS_PO2(val) __is_po2((unsigned long long)(val))
  74
  75 #define LOWEST_BIT_SET(x)       ((x) & ~((x) - 1))
  76
  77 /*
  78  * Lustre Error Checksum: calculates checksum
  79  * of Hex number by XORing each bit.
  80  */
  81 #define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
  82                            ((hexnum) >> 8 & 0xf))
  83
  84 #define LUSTRE_SRV_LNET_PID      LUSTRE_LNET_PID
  85
  86 #include <linux/list.h>
  87
  88 /* libcfs tcpip */
  89 int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
  90 int libcfs_ipif_enumerate(char ***names);
  91 void libcfs_ipif_free_enumeration(char **names, int n);
  92 int libcfs_sock_listen(socket_t **sockp, __u32 ip, int port, int backlog);
  93 int libcfs_sock_accept(socket_t **newsockp, socket_t *sock);
  94 void libcfs_sock_abort_accept(socket_t *sock);
  95 int libcfs_sock_connect(socket_t **sockp, int *fatal,
  96                         __u32 local_ip, int local_port,
  97                         __u32 peer_ip, int peer_port);
  98 int libcfs_sock_setbuf(socket_t *socket, int txbufsize, int rxbufsize);
  99 int libcfs_sock_getbuf(socket_t *socket, int *txbufsize, int *rxbufsize);
 100 int libcfs_sock_getaddr(socket_t *socket, int remote, __u32 *ip, int *port);
 101 int libcfs_sock_write(socket_t *sock, void *buffer, int nob, int timeout);
 102 int libcfs_sock_read(socket_t *sock, void *buffer, int nob, int timeout);
 103 void libcfs_sock_release(socket_t *sock);
 104
 105 /* need both kernel and user-land acceptor */
 106 #define LNET_ACCEPTOR_MIN_RESERVED_PORT    512
 107 #define LNET_ACCEPTOR_MAX_RESERVED_PORT    1023
 108
 109 /*
 110  * libcfs pseudo device operations
 111  *
 112  * It's just draft now.
 113  */
 114
 115 struct cfs_psdev_file {
 116         unsigned long   off;
 117         void        *private_data;
 118         unsigned long   reserved1;
 119         unsigned long   reserved2;
 120 };
 121
 122 struct cfs_psdev_ops {
 123         int (*p_open)(unsigned long, void *);
 124         int (*p_close)(unsigned long, void *);
 125         int (*p_read)(struct cfs_psdev_file *, char *, unsigned long);
 126         int (*p_write)(struct cfs_psdev_file *, char *, unsigned long);
 127         int (*p_ioctl)(struct cfs_psdev_file *, unsigned long, void *);
 128 };
 129
 130 /*
 131  * Drop into debugger, if possible. Implementation is provided by platform.
 132  */
 133
 134 void cfs_enter_debugger(void);
 135
 136 /*
 137  * Defined by platform
 138  */
 139 int unshare_fs_struct(void);
 140 sigset_t cfs_get_blocked_sigs(void);
 141 sigset_t cfs_block_allsigs(void);
 142 sigset_t cfs_block_sigs(unsigned long sigs);
 143 sigset_t cfs_block_sigsinv(unsigned long sigs);
 144 void cfs_restore_sigs(sigset_t);
 145 int cfs_signal_pending(void);
 146 void cfs_clear_sigpending(void);
 147
 148 /*
 149  * Random number handling
 150  */
 151
 152 /* returns a random 32-bit integer */
 153 unsigned int cfs_rand(void);
 154 /* seed the generator */
 155 void cfs_srand(unsigned int, unsigned int);
 156 void cfs_get_random_bytes(void *buf, int size);
 157
 158 #include "libcfs_debug.h"
 159 #include "libcfs_cpu.h"
 160 #include "libcfs_private.h"
 161 #include "libcfs_ioctl.h"
 162 #include "libcfs_prim.h"
 163 #include "libcfs_time.h"
 164 #include "libcfs_string.h"
 165 #include "libcfs_kernelcomm.h"
 166 #include "libcfs_workitem.h"
 167 #include "libcfs_hash.h"
 168 #include "libcfs_heap.h"
 169 #include "libcfs_fail.h"
 170 #include "params_tree.h"
 171 #include "libcfs_crypto.h"
 172
 173 /* container_of depends on "likely" which is defined in libcfs_private.h */
 174 static inline void *__container_of(void *ptr, unsigned long shift)
 175 {
 176         if (unlikely(IS_ERR(ptr) || ptr == NULL))
 177                 return ptr;
 178         else
 179                 return (char *)ptr - shift;
 180 }
 181
 182 #define container_of0(ptr, type, member) \
 183         ((type *)__container_of((void *)(ptr), offsetof(type, member)))
 184
 185 #define _LIBCFS_H
 186
 187 #endif /* _LIBCFS_H */