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__
41 #define __attribute__(x)
44 #include <libcfs/types.h>
46 #if !defined(__KERNEL__)
47 #include <libcfs/posix/libcfs.h>
48 #elif defined(__linux__)
49 #include <libcfs/linux/libcfs.h>
51 #error Unsupported operating system.
57 # define offsetof(typ,memb) ((long)(long_ptr_t)((char *)&(((typ *)0)->memb)))
61 #define ARRAY_SIZE(a) ((sizeof (a)) / (sizeof ((a)[0])))
65 #define swap(x,y) do { typeof(x) z = x; x = y; y = z; } while (0)
68 #if !defined(container_of)
69 /* given a pointer @ptr to the field @member embedded into type (usually
70 * struct) @type, return pointer to the embedding instance of @type. */
71 #define container_of(ptr, type, member) \
72 ((type *)((char *)(ptr)-(char *)(&((type *)0)->member)))
75 static inline int __is_po2(unsigned long long val)
77 return !(val & (val - 1));
80 #define IS_PO2(val) __is_po2((unsigned long long)(val))
82 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
84 /* Sparse annotations */
86 # if !defined(__must_hold)
88 # define __must_hold(x) __attribute__((context(x, 1, 1)))
89 # else /* __CHECKER__ */
90 # define __must_hold(x)
91 # endif /* !__CHECKER__ */
92 # endif /* !__must_hold */
93 #else /* __KERNEL__ */
94 # define __acquires(x)
95 # define __releases(x)
96 # define __must_hold(x)
97 #endif /* !__KERNEL__ */
100 * Lustre Error Checksum: calculates checksum
101 * of Hex number by XORing each bit.
103 #define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
104 ((hexnum) >> 8 & 0xf))
107 * Some (nomina odiosa sunt) platforms define NULL as naked 0. This confuses
108 * Lustre RETURN(NULL) macro.
114 #define NULL ((void *)0)
116 #define LUSTRE_SRV_LNET_PID LUSTRE_LNET_PID
120 #include <libcfs/list.h>
122 #ifndef cfs_for_each_possible_cpu
123 # error cfs_for_each_possible_cpu is not supported by kernel!
127 int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
128 int libcfs_ipif_enumerate(char ***names);
129 void libcfs_ipif_free_enumeration(char **names, int n);
130 int libcfs_sock_listen(cfs_socket_t **sockp, __u32 ip, int port, int backlog);
131 int libcfs_sock_accept(cfs_socket_t **newsockp, cfs_socket_t *sock);
132 void libcfs_sock_abort_accept(cfs_socket_t *sock);
133 int libcfs_sock_connect(cfs_socket_t **sockp, int *fatal,
134 __u32 local_ip, int local_port,
135 __u32 peer_ip, int peer_port);
136 int libcfs_sock_setbuf(cfs_socket_t *socket, int txbufsize, int rxbufsize);
137 int libcfs_sock_getbuf(cfs_socket_t *socket, int *txbufsize, int *rxbufsize);
138 int libcfs_sock_getaddr(cfs_socket_t *socket, int remote, __u32 *ip, int *port);
139 int libcfs_sock_write(cfs_socket_t *sock, void *buffer, int nob, int timeout);
140 int libcfs_sock_read(cfs_socket_t *sock, void *buffer, int nob, int timeout);
141 void libcfs_sock_release(cfs_socket_t *sock);
143 /* libcfs watchdogs */
146 /* Add a watchdog which fires after "time" milliseconds of delay. You have to
147 * touch it once to enable it. */
148 struct lc_watchdog *lc_watchdog_add(int time,
149 void (*cb)(pid_t pid, void *),
152 /* Enables a watchdog and resets its timer. */
153 void lc_watchdog_touch(struct lc_watchdog *lcw, int timeout);
154 #define CFS_GET_TIMEOUT(svc) (max_t(int, obd_timeout, \
155 AT_OFF ? 0 : at_get(&svc->srv_at_estimate)) * \
156 svc->srv_watchdog_factor)
158 /* Disable a watchdog; touch it to restart it. */
159 void lc_watchdog_disable(struct lc_watchdog *lcw);
161 /* Clean up the watchdog */
162 void lc_watchdog_delete(struct lc_watchdog *lcw);
164 /* Dump a debug log */
165 void lc_watchdog_dumplog(pid_t pid, void *data);
167 #else /* !__KERNEL__ */
170 #define PAGE_SIZE sysconf(_SC_PAGESIZE)
172 #endif /* !__KERNEL__ */
174 /* need both kernel and user-land acceptor */
175 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
176 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
179 * libcfs pseudo device operations
181 * struct struct miscdevice and
182 * misc_register() and
183 * misc_deregister() are declared in
184 * libcfs/<os>/<os>-prim.h
186 * It's just draft now.
189 struct cfs_psdev_file {
192 unsigned long reserved1;
193 unsigned long reserved2;
196 struct cfs_psdev_ops {
197 int (*p_open)(unsigned long, void *);
198 int (*p_close)(unsigned long, void *);
199 int (*p_read)(struct cfs_psdev_file *, char *, unsigned long);
200 int (*p_write)(struct cfs_psdev_file *, char *, unsigned long);
201 int (*p_ioctl)(struct cfs_psdev_file *, unsigned long, void *);
205 * Drop into debugger, if possible. Implementation is provided by platform.
208 void cfs_enter_debugger(void);
211 * Defined by platform
213 int unshare_fs_struct(void);
214 sigset_t cfs_get_blocked_sigs(void);
215 sigset_t cfs_block_allsigs(void);
216 sigset_t cfs_block_sigs(unsigned long sigs);
217 sigset_t cfs_block_sigsinv(unsigned long sigs);
218 void cfs_restore_sigs(sigset_t);
219 int cfs_signal_pending(void);
220 void cfs_clear_sigpending(void);
222 int convert_server_error(__u64 ecode);
223 int convert_client_oflag(int cflag, int *result);
226 * Stack-tracing filling.
230 * Platform-dependent data-type to hold stack frames.
232 struct cfs_stack_trace;
235 * Fill @trace with current back-trace.
237 void cfs_stack_trace_fill(struct cfs_stack_trace *trace);
240 * Return instruction pointer for frame @frame_no. NULL if @frame_no is
243 void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no);
246 * Random number handling
249 /* returns a random 32-bit integer */
250 unsigned int cfs_rand(void);
251 /* seed the generator */
252 void cfs_srand(unsigned int, unsigned int);
253 void cfs_get_random_bytes(void *buf, int size);
255 #include <libcfs/err.h>
256 #include <libcfs/libcfs_debug.h>
257 #include <libcfs/libcfs_private.h>
258 #include <libcfs/bitmap.h>
259 #include <libcfs/libcfs_cpu.h>
260 #include <libcfs/libcfs_ioctl.h>
261 #include <libcfs/libcfs_prim.h>
262 #include <libcfs/libcfs_time.h>
263 #include <libcfs/libcfs_string.h>
264 #include <libcfs/libcfs_kernelcomm.h>
265 #include <libcfs/libcfs_workitem.h>
266 #include <libcfs/libcfs_hash.h>
267 #include <libcfs/libcfs_heap.h>
268 #include <libcfs/libcfs_fail.h>
269 #include <libcfs/params_tree.h>
271 /* container_of depends on "likely" which is defined in libcfs_private.h */
272 static inline void *__container_of(const void *ptr, unsigned long shift)
274 if (unlikely(IS_ERR(ptr) || ptr == NULL))
275 return ERR_CAST(ptr);
277 return (char *)ptr - shift;
280 #define container_of0(ptr, type, member) \
281 ((type *)__container_of((ptr), offsetof(type, member)))
285 #endif /* _LIBCFS_H */