1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see [sun.com URL with a
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
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 #if !defined(__WINNT__) && !defined(__KERNEL__)
45 #include <libcfs/posix/libcfs.h>
46 #elif defined(__linux__)
47 #include <libcfs/linux/libcfs.h>
48 #elif defined(__APPLE__)
49 #include <libcfs/darwin/libcfs.h>
50 #elif defined(__WINNT__)
51 #include <libcfs/winnt/libcfs.h>
53 #error Unsupported operating system.
59 # define offsetof(typ,memb) ((unsigned long)((char *)&(((typ *)0)->memb)))
62 /* cardinality of array */
64 #define ARRAY_SIZE(a) ((sizeof (a)) / (sizeof ((a)[0])))
67 #if !defined(container_of)
68 /* given a pointer @ptr to the field @member embedded into type (usually
69 * struct) @type, return pointer to the embedding instance of @type. */
70 #define container_of(ptr, type, member) \
71 ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
74 #define container_of0(ptr, type, member) \
76 typeof(ptr) __ptr = (ptr); \
79 if (unlikely(IS_ERR(__ptr) || __ptr == NULL)) \
80 __res = (type *)__ptr; \
82 __res = container_of(__ptr, type, member); \
87 * true iff @i is power-of-2
97 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
101 * Lustre Error Checksum: calculates checksum
102 * of Hex number by XORing each bit.
104 #define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
105 ((hexnum) >> 8 & 0xf))
109 * Some (nomina odiosa sunt) platforms define NULL as naked 0. This confuses
110 * Lustre RETURN(NULL) macro.
116 #define NULL ((void *)0)
118 #define LUSTRE_SRV_LNET_PID LUSTRE_LNET_PID
122 #include <libcfs/list.h>
125 int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
126 int libcfs_ipif_enumerate(char ***names);
127 void libcfs_ipif_free_enumeration(char **names, int n);
128 int libcfs_sock_listen(cfs_socket_t **sockp, __u32 ip, int port, int backlog);
129 int libcfs_sock_accept(cfs_socket_t **newsockp, cfs_socket_t *sock);
130 void libcfs_sock_abort_accept(cfs_socket_t *sock);
131 int libcfs_sock_connect(cfs_socket_t **sockp, int *fatal,
132 __u32 local_ip, int local_port,
133 __u32 peer_ip, int peer_port);
134 int libcfs_sock_setbuf(cfs_socket_t *socket, int txbufsize, int rxbufsize);
135 int libcfs_sock_getbuf(cfs_socket_t *socket, int *txbufsize, int *rxbufsize);
136 int libcfs_sock_getaddr(cfs_socket_t *socket, int remote, __u32 *ip, int *port);
137 int libcfs_sock_write(cfs_socket_t *sock, void *buffer, int nob, int timeout);
138 int libcfs_sock_read(cfs_socket_t *sock, void *buffer, int nob, int timeout);
139 void libcfs_sock_release(cfs_socket_t *sock);
141 /* libcfs watchdogs */
144 /* Add a watchdog which fires after "time" milliseconds of delay. You have to
145 * touch it once to enable it. */
146 struct lc_watchdog *lc_watchdog_add(int time,
147 void (*cb)(pid_t pid, void *),
150 /* Enables a watchdog and resets its timer. */
151 void lc_watchdog_touch_ms(struct lc_watchdog *lcw, int timeout_ms);
152 void lc_watchdog_touch(struct lc_watchdog *lcw);
154 /* Disable a watchdog; touch it to restart it. */
155 void lc_watchdog_disable(struct lc_watchdog *lcw);
157 /* Clean up the watchdog */
158 void lc_watchdog_delete(struct lc_watchdog *lcw);
160 /* Dump a debug log */
161 void lc_watchdog_dumplog(pid_t pid, void *data);
163 #endif /* __KERNEL__ */
165 /* need both kernel and user-land acceptor */
166 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
167 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
170 * libcfs pseudo device operations
172 * struct cfs_psdev_t and
173 * cfs_psdev_register() and
174 * cfs_psdev_deregister() are declared in
175 * libcfs/<os>/cfs_prim.h
177 * It's just draft now.
180 struct cfs_psdev_file {
183 unsigned long reserved1;
184 unsigned long reserved2;
187 struct cfs_psdev_ops {
188 int (*p_open)(unsigned long, void *);
189 int (*p_close)(unsigned long, void *);
190 int (*p_read)(struct cfs_psdev_file *, char *, unsigned long);
191 int (*p_write)(struct cfs_psdev_file *, char *, unsigned long);
192 int (*p_ioctl)(struct cfs_psdev_file *, unsigned long, void *);
196 * Universal memory allocator API
198 enum cfs_alloc_flags {
199 /* allocation is not allowed to block */
200 CFS_ALLOC_ATOMIC = 0x1,
201 /* allocation is allowed to block */
202 CFS_ALLOC_WAIT = 0x2,
203 /* allocation should return zeroed memory */
204 CFS_ALLOC_ZERO = 0x4,
205 /* allocation is allowed to call file-system code to free/clean
208 /* allocation is allowed to do io to free/clean memory */
210 /* don't report allocation failure to the console */
211 CFS_ALLOC_NOWARN = 0x20,
212 /* standard allocator flag combination */
213 CFS_ALLOC_STD = CFS_ALLOC_FS | CFS_ALLOC_IO,
214 CFS_ALLOC_USER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO,
217 /* flags for cfs_page_alloc() in addition to enum cfs_alloc_flags */
218 enum cfs_alloc_page_flags {
219 /* allow to return page beyond KVM. It has to be mapped into KVM by
221 CFS_ALLOC_HIGH = 0x40,
222 CFS_ALLOC_HIGHUSER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO | CFS_ALLOC_HIGH,
226 * Drop into debugger, if possible. Implementation is provided by platform.
229 void cfs_enter_debugger(void);
232 * Defined by platform
234 void cfs_daemonize(char *str);
235 int cfs_daemonize_ctxt(char *str);
236 cfs_sigset_t cfs_get_blocked_sigs(void);
237 cfs_sigset_t cfs_block_allsigs(void);
238 cfs_sigset_t cfs_block_sigs(cfs_sigset_t bits);
239 void cfs_restore_sigs(cfs_sigset_t);
240 int cfs_signal_pending(void);
241 void cfs_clear_sigpending(void);
244 * these macros should be removed in the future,
245 * we keep them just for keeping libcfs compatible
246 * with other branches.
248 #define libcfs_daemonize(s) cfs_daemonize(s)
249 #define cfs_sigmask_lock(f) do { f= 0; } while (0)
250 #define cfs_sigmask_unlock(f) do { f= 0; } while (0)
252 int convert_server_error(__u64 ecode);
253 int convert_client_oflag(int cflag, int *result);
256 * Stack-tracing filling.
260 * Platform-dependent data-type to hold stack frames.
262 struct cfs_stack_trace;
265 * Fill @trace with current back-trace.
267 void cfs_stack_trace_fill(struct cfs_stack_trace *trace);
270 * Return instruction pointer for frame @frame_no. NULL if @frame_no is
273 void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no);
276 * Universal open flags.
278 #define CFS_O_ACCMODE 0003
279 #define CFS_O_CREAT 0100
280 #define CFS_O_EXCL 0200
281 #define CFS_O_NOCTTY 0400
282 #define CFS_O_TRUNC 01000
283 #define CFS_O_APPEND 02000
284 #define CFS_O_NONBLOCK 04000
285 #define CFS_O_NDELAY CFS_O_NONBLOCK
286 #define CFS_O_SYNC 010000
287 #define CFS_O_ASYNC 020000
288 #define CFS_O_DIRECT 040000
289 #define CFS_O_LARGEFILE 0100000
290 #define CFS_O_DIRECTORY 0200000
291 #define CFS_O_NOFOLLOW 0400000
292 #define CFS_O_NOATIME 01000000
294 /* convert local open flags to universal open flags */
295 int cfs_oflags2univ(int flags);
296 /* convert universal open flags to local open flags */
297 int cfs_univ2oflags(int flags);
299 #include <libcfs/libcfs_debug.h>
300 #include <libcfs/libcfs_private.h>
301 #include <libcfs/libcfs_ioctl.h>
302 #include <libcfs/libcfs_prim.h>
303 #include <libcfs/libcfs_time.h>
307 #endif /* _LIBCFS_H */