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 <libcfs/types.h>
43 # include <libcfs/linux/libcfs.h>
44 #else /* __KERNEL__ */
45 # include <libcfs/posix/libcfs.h>
46 #endif /* !__KERNEL__ */
51 # define offsetof(typ,memb) ((long)(long_ptr_t)((char *)&(((typ *)0)->memb)))
55 #define ARRAY_SIZE(a) ((sizeof (a)) / (sizeof ((a)[0])))
59 #define swap(x,y) do { typeof(x) z = x; x = y; y = z; } while (0)
62 #if !defined(container_of)
63 /* given a pointer @ptr to the field @member embedded into type (usually
64 * struct) @type, return pointer to the embedding instance of @type. */
65 #define container_of(ptr, type, member) \
66 ((type *)((char *)(ptr)-(char *)(&((type *)0)->member)))
69 static inline int __is_po2(unsigned long long val)
71 return !(val & (val - 1));
74 #define IS_PO2(val) __is_po2((unsigned long long)(val))
76 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
78 /* Sparse annotations */
80 # if !defined(__must_hold)
82 # define __must_hold(x) __attribute__((context(x, 1, 1)))
83 # else /* __CHECKER__ */
84 # define __must_hold(x)
85 # endif /* !__CHECKER__ */
86 # endif /* !__must_hold */
87 #else /* __KERNEL__ */
88 # define __acquires(x)
89 # define __releases(x)
90 # define __must_hold(x)
91 #endif /* !__KERNEL__ */
94 * Lustre Error Checksum: calculates checksum
95 * of Hex number by XORing each bit.
97 #define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
98 ((hexnum) >> 8 & 0xf))
101 * Some (nomina odiosa sunt) platforms define NULL as naked 0. This confuses
102 * Lustre RETURN(NULL) macro.
108 #define NULL ((void *)0)
112 #include <libcfs/list.h>
114 #ifndef cfs_for_each_possible_cpu
115 # error cfs_for_each_possible_cpu is not supported by kernel!
119 int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
120 int libcfs_ipif_enumerate(char ***names);
121 void libcfs_ipif_free_enumeration(char **names, int n);
122 int libcfs_sock_listen(cfs_socket_t **sockp, __u32 ip, int port, int backlog);
123 int libcfs_sock_accept(cfs_socket_t **newsockp, cfs_socket_t *sock);
124 void libcfs_sock_abort_accept(cfs_socket_t *sock);
125 int libcfs_sock_connect(cfs_socket_t **sockp, int *fatal,
126 __u32 local_ip, int local_port,
127 __u32 peer_ip, int peer_port);
128 int libcfs_sock_setbuf(cfs_socket_t *socket, int txbufsize, int rxbufsize);
129 int libcfs_sock_getbuf(cfs_socket_t *socket, int *txbufsize, int *rxbufsize);
130 int libcfs_sock_getaddr(cfs_socket_t *socket, int remote, __u32 *ip, int *port);
131 int libcfs_sock_write(cfs_socket_t *sock, void *buffer, int nob, int timeout);
132 int libcfs_sock_read(cfs_socket_t *sock, void *buffer, int nob, int timeout);
133 void libcfs_sock_release(cfs_socket_t *sock);
135 /* libcfs watchdogs */
138 /* Add a watchdog which fires after "time" milliseconds of delay. You have to
139 * touch it once to enable it. */
140 struct lc_watchdog *lc_watchdog_add(int time,
141 void (*cb)(pid_t pid, void *),
144 /* Enables a watchdog and resets its timer. */
145 void lc_watchdog_touch(struct lc_watchdog *lcw, int timeout);
146 #define CFS_GET_TIMEOUT(svc) (max_t(int, obd_timeout, \
147 AT_OFF ? 0 : at_get(&svc->srv_at_estimate)) * \
148 svc->srv_watchdog_factor)
150 /* Disable a watchdog; touch it to restart it. */
151 void lc_watchdog_disable(struct lc_watchdog *lcw);
153 /* Clean up the watchdog */
154 void lc_watchdog_delete(struct lc_watchdog *lcw);
156 /* Dump a debug log */
157 void lc_watchdog_dumplog(pid_t pid, void *data);
159 #else /* !__KERNEL__ */
162 #define PAGE_SIZE sysconf(_SC_PAGESIZE)
164 #endif /* !__KERNEL__ */
166 /* need both kernel and user-land acceptor */
167 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
168 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
171 * libcfs pseudo device operations
173 * struct struct miscdevice and
174 * misc_register() and
175 * misc_deregister() are declared in
176 * libcfs/<os>/<os>-prim.h
178 * It's just draft now.
181 struct cfs_psdev_file {
184 unsigned long reserved1;
185 unsigned long reserved2;
188 struct cfs_psdev_ops {
189 int (*p_open)(unsigned long, void *);
190 int (*p_close)(unsigned long, void *);
191 int (*p_read)(struct cfs_psdev_file *, char *, unsigned long);
192 int (*p_write)(struct cfs_psdev_file *, char *, unsigned long);
193 int (*p_ioctl)(struct cfs_psdev_file *, unsigned long, void __user *);
197 * Drop into debugger, if possible. Implementation is provided by platform.
200 void cfs_enter_debugger(void);
203 * Defined by platform
205 int unshare_fs_struct(void);
206 sigset_t cfs_get_blocked_sigs(void);
207 sigset_t cfs_block_allsigs(void);
208 sigset_t cfs_block_sigs(unsigned long sigs);
209 sigset_t cfs_block_sigsinv(unsigned long sigs);
210 void cfs_restore_sigs(sigset_t);
211 int cfs_signal_pending(void);
212 void cfs_clear_sigpending(void);
214 int convert_server_error(__u64 ecode);
215 int convert_client_oflag(int cflag, int *result);
218 * Stack-tracing filling.
222 * Platform-dependent data-type to hold stack frames.
224 struct cfs_stack_trace;
227 * Fill @trace with current back-trace.
229 void cfs_stack_trace_fill(struct cfs_stack_trace *trace);
232 * Return instruction pointer for frame @frame_no. NULL if @frame_no is
235 void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no);
238 * Random number handling
241 /* returns a random 32-bit integer */
242 unsigned int cfs_rand(void);
243 /* seed the generator */
244 void cfs_srand(unsigned int, unsigned int);
245 void cfs_get_random_bytes(void *buf, int size);
247 #include <libcfs/byteorder.h>
248 #include <libcfs/err.h>
249 #include <libcfs/libcfs_debug.h>
250 #include <libcfs/libcfs_private.h>
251 #include <libcfs/bitmap.h>
252 #include <libcfs/libcfs_cpu.h>
253 #include <libcfs/libcfs_ioctl.h>
254 #include <libcfs/libcfs_prim.h>
255 #include <libcfs/libcfs_time.h>
256 #include <libcfs/libcfs_string.h>
257 #include <libcfs/libcfs_kernelcomm.h>
258 #include <libcfs/libcfs_workitem.h>
259 #include <libcfs/libcfs_hash.h>
260 #include <libcfs/libcfs_heap.h>
261 #include <libcfs/libcfs_fail.h>
262 #include <libcfs/params_tree.h>
264 /* container_of depends on "likely" which is defined in libcfs_private.h */
265 static inline void *__container_of(const void *ptr, unsigned long shift)
267 if (unlikely(IS_ERR(ptr) || ptr == NULL))
268 return ERR_CAST(ptr);
270 return (char *)ptr - shift;
273 #define container_of0(ptr, type, member) \
274 ((type *)__container_of((ptr), offsetof(type, member)))
278 #endif /* _LIBCFS_H */