1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 #ifndef __LIBCFS_LIBCFS_H__
5 #define __LIBCFS_LIBCFS_H__
8 #define __attribute__(x)
11 #if defined(__linux__)
12 #include <libcfs/linux/libcfs.h>
13 #elif defined(__APPLE__)
14 #include <libcfs/darwin/libcfs.h>
15 #elif defined(__WINNT__)
16 #include <libcfs/winnt/libcfs.h>
18 #error Unsupported operating system.
27 /* Controlled via configure key */
28 /* #define LIBCFS_DEBUG */
31 # define offsetof(typ,memb) ((unsigned long)((char *)&(((typ *)0)->memb)))
34 /* cardinality of array */
35 #define sizeof_array(a) ((sizeof (a)) / (sizeof ((a)[0])))
37 #if !defined(container_of)
38 /* given a pointer @ptr to the field @member embedded into type (usually
39 * struct) @type, return pointer to the embedding instance of @type. */
40 #define container_of(ptr, type, member) \
41 ((type *)((char *)(ptr)-(unsigned long)(&((type *)0)->member)))
44 #define container_of0(ptr, type, member) \
46 typeof(ptr) __ptr = (ptr); \
49 if (unlikely(IS_ERR(__ptr) || __ptr == NULL)) \
50 __res = (type *)__ptr; \
52 __res = container_of(__ptr, type, member); \
57 * true iff @i is power-of-2
67 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
72 extern unsigned int libcfs_subsystem_debug;
73 extern unsigned int libcfs_stack;
74 extern unsigned int libcfs_debug;
75 extern unsigned int libcfs_printk;
76 extern unsigned int libcfs_console_ratelimit;
77 extern unsigned int libcfs_debug_binary;
78 extern char debug_file_path[1024];
80 int libcfs_debug_mask2str(char *str, int size, int mask, int is_subsys);
81 int libcfs_debug_str2mask(int *mask, const char *str, int is_subsys);
83 /* Has there been an LBUG? */
84 extern unsigned int libcfs_catastrophe;
85 extern unsigned int libcfs_panic_on_lbug;
88 * struct ptldebug_header is defined in libcfs/<os>/libcfs.h
91 #define PH_FLAG_FIRST_RECORD 1
93 /* Debugging subsystems (32 bits, non-overlapping) */
94 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
95 #define S_UNDEFINED 0x00000001
96 #define S_MDC 0x00000002
97 #define S_MDS 0x00000004
98 #define S_OSC 0x00000008
99 #define S_OST 0x00000010
100 #define S_CLASS 0x00000020
101 #define S_LOG 0x00000040
102 #define S_LLITE 0x00000080
103 #define S_RPC 0x00000100
104 #define S_MGMT 0x00000200
105 #define S_LNET 0x00000400
106 #define S_LND 0x00000800 /* ALL LNDs */
107 #define S_PINGER 0x00001000
108 #define S_FILTER 0x00002000
110 #define S_ECHO 0x00008000
111 #define S_LDLM 0x00010000
112 #define S_LOV 0x00020000
118 #define S_LMV 0x00800000 /* b_new_cmd */
120 #define S_SEC 0x02000000 /* upcall cache */
121 #define S_GSS 0x04000000 /* b_new_cmd */
123 #define S_MGC 0x10000000
124 #define S_MGS 0x20000000
125 #define S_FID 0x40000000 /* b_new_cmd */
126 #define S_FLD 0x80000000 /* b_new_cmd */
127 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
129 /* Debugging masks (32 bits, non-overlapping) */
130 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
131 #define D_TRACE 0x00000001 /* ENTRY/EXIT markers */
132 #define D_INODE 0x00000002
133 #define D_SUPER 0x00000004
134 #define D_EXT2 0x00000008 /* anything from ext2_debug */
135 #define D_MALLOC 0x00000010 /* print malloc, free information */
136 #define D_CACHE 0x00000020 /* cache-related items */
137 #define D_INFO 0x00000040 /* general information */
138 #define D_IOCTL 0x00000080 /* ioctl related information */
139 #define D_NETERROR 0x00000100 /* network errors */
140 #define D_NET 0x00000200 /* network communications */
141 #define D_WARNING 0x00000400 /* CWARN(...) == CDEBUG (D_WARNING, ...) */
142 #define D_BUFFS 0x00000800
143 #define D_OTHER 0x00001000
144 #define D_DENTRY 0x00002000
145 #define D_NETTRACE 0x00004000
146 #define D_PAGE 0x00008000 /* bulk page handling */
147 #define D_DLMTRACE 0x00010000
148 #define D_ERROR 0x00020000 /* CERROR(...) == CDEBUG (D_ERROR, ...) */
149 #define D_EMERG 0x00040000 /* CEMERG(...) == CDEBUG (D_EMERG, ...) */
150 #define D_HA 0x00080000 /* recovery and failover */
151 #define D_RPCTRACE 0x00100000 /* for distributed debugging */
152 #define D_VFSTRACE 0x00200000
153 #define D_READA 0x00400000 /* read-ahead */
154 #define D_MMAP 0x00800000
155 #define D_CONFIG 0x01000000
156 #define D_CONSOLE 0x02000000
157 #define D_QUOTA 0x04000000
158 #define D_SEC 0x08000000
159 /* keep these in sync with lnet/{utils,libcfs}/debug.c */
161 #define D_CANTMASK (D_ERROR | D_EMERG | D_WARNING | D_CONSOLE)
163 #ifndef DEBUG_SUBSYSTEM
164 # define DEBUG_SUBSYSTEM S_UNDEFINED
167 #define CDEBUG_MAX_LIMIT 600
169 cfs_time_t cdls_next;
171 cfs_duration_t cdls_delay;
172 } cfs_debug_limit_state_t;
174 /* Controlled via configure key */
175 /* #define CDEBUG_ENABLED */
177 #if defined(__KERNEL__) || (defined(__arch_lib__) && !defined(LUSTRE_UTILS))
179 #ifdef CDEBUG_ENABLED
180 #define __CDEBUG(cdls, mask, format, a...) \
184 if (((mask) & D_CANTMASK) != 0 || \
185 ((libcfs_debug & (mask)) != 0 && \
186 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
187 libcfs_debug_msg(cdls, DEBUG_SUBSYSTEM, mask, \
188 __FILE__, __FUNCTION__, __LINE__, \
192 #define CDEBUG(mask, format, a...) __CDEBUG(NULL, mask, format, ## a)
194 #define CDEBUG_LIMIT(mask, format, a...) \
196 static cfs_debug_limit_state_t cdls; \
198 __CDEBUG(&cdls, mask, format, ## a); \
201 #else /* CDEBUG_ENABLED */
202 #define CDEBUG(mask, format, a...) (void)(0)
203 #define CDEBUG_LIMIT(mask, format, a...) (void)(0)
204 #warning "CDEBUG IS DISABLED. THIS SHOULD NEVER BE DONE FOR PRODUCTION!"
209 #define CDEBUG(mask, format, a...) \
211 if (((mask) & D_CANTMASK) != 0) \
212 fprintf(stderr, "(%s:%d:%s()) " format, \
213 __FILE__, __LINE__, __FUNCTION__, ## a); \
216 #define CDEBUG_LIMIT CDEBUG
218 #endif /* !__KERNEL__ */
221 * Lustre Error Checksum: calculates checksum
222 * of Hex number by XORing each bit.
224 #define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
225 ((hexnum) >> 8 & 0xf))
227 #define CWARN(format, a...) CDEBUG_LIMIT(D_WARNING, format, ## a)
228 #define CERROR(format, a...) CDEBUG_LIMIT(D_ERROR, format, ## a)
229 #define CEMERG(format, a...) CDEBUG_LIMIT(D_EMERG, format, ## a)
231 #define LCONSOLE(mask, format, a...) CDEBUG(D_CONSOLE | (mask), format, ## a)
232 #define LCONSOLE_INFO(format, a...) CDEBUG_LIMIT(D_CONSOLE, format, ## a)
233 #define LCONSOLE_WARN(format, a...) CDEBUG_LIMIT(D_CONSOLE | D_WARNING, format, ## a)
234 #define LCONSOLE_ERROR_MSG(errnum, format, a...) CDEBUG_LIMIT(D_CONSOLE | D_ERROR, \
235 "%x-%x: " format, errnum, LERRCHKSUM(errnum), ## a)
236 #define LCONSOLE_ERROR(format, a...) LCONSOLE_ERROR_MSG(0x00, format, ## a)
238 #define LCONSOLE_EMERG(format, a...) CDEBUG(D_CONSOLE | D_EMERG, format, ## a)
240 #ifdef CDEBUG_ENABLED
242 #define GOTO(label, rc) \
244 long GOTO__ret = (long)(rc); \
245 CDEBUG(D_TRACE,"Process leaving via %s (rc=%lu : %ld : %lx)\n", \
246 #label, (unsigned long)GOTO__ret, (signed long)GOTO__ret,\
247 (signed long)GOTO__ret); \
251 #define GOTO(label, rc) do { ((void)(rc)); goto label; } while (0)
254 /* Controlled via configure key */
255 /* #define CDEBUG_ENTRY_EXIT */
257 #ifdef CDEBUG_ENTRY_EXIT
260 * if rc == NULL, we need to code as RETURN((void *)NULL), otherwise
261 * there will be a warning in osx.
265 typeof(rc) RETURN__ret = (rc); \
266 CDEBUG(D_TRACE, "Process leaving (rc=%lu : %ld : %lx)\n", \
267 (long)RETURN__ret, (long)RETURN__ret, (long)RETURN__ret);\
269 return RETURN__ret; \
275 CDEBUG(D_TRACE, "Process entered\n"); \
280 CDEBUG(D_TRACE, "Process leaving\n"); \
283 #else /* !CDEBUG_ENTRY_EXIT */
285 #define RETURN(rc) return (rc)
286 #define ENTRY do { } while (0)
287 #define EXIT do { } while (0)
289 #endif /* !CDEBUG_ENTRY_EXIT */
292 * Some (nomina odiosa sunt) platforms define NULL as naked 0. This confuses
293 * Lustre RETURN(NULL) macro.
299 #define NULL ((void *)0)
301 #define LUSTRE_SRV_LNET_PID LUSTRE_LNET_PID
305 #include <libcfs/list.h>
307 struct libcfs_ioctl_data; /* forward ref */
309 struct libcfs_ioctl_handler {
310 struct list_head item;
311 int (*handle_ioctl)(unsigned int cmd, struct libcfs_ioctl_data *data);
314 #define DECLARE_IOCTL_HANDLER(ident, func) \
315 struct libcfs_ioctl_handler ident = { \
316 /* .item = */ CFS_LIST_HEAD_INIT(ident.item), \
317 /* .handle_ioctl = */ func \
320 int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand);
321 int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand);
324 int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
325 int libcfs_ipif_enumerate(char ***names);
326 void libcfs_ipif_free_enumeration(char **names, int n);
327 int libcfs_sock_listen(cfs_socket_t **sockp, __u32 ip, int port, int backlog);
328 int libcfs_sock_accept(cfs_socket_t **newsockp, cfs_socket_t *sock);
329 void libcfs_sock_abort_accept(cfs_socket_t *sock);
330 int libcfs_sock_connect(cfs_socket_t **sockp, int *fatal,
331 __u32 local_ip, int local_port,
332 __u32 peer_ip, int peer_port);
333 int libcfs_sock_setbuf(cfs_socket_t *socket, int txbufsize, int rxbufsize);
334 int libcfs_sock_getbuf(cfs_socket_t *socket, int *txbufsize, int *rxbufsize);
335 int libcfs_sock_getaddr(cfs_socket_t *socket, int remote, __u32 *ip, int *port);
336 int libcfs_sock_write(cfs_socket_t *sock, void *buffer, int nob, int timeout);
337 int libcfs_sock_read(cfs_socket_t *sock, void *buffer, int nob, int timeout);
338 void libcfs_sock_release(cfs_socket_t *sock);
340 /* libcfs watchdogs */
343 /* Add a watchdog which fires after "time" milliseconds of delay. You have to
344 * touch it once to enable it. */
345 struct lc_watchdog *lc_watchdog_add(int time,
346 void (*cb)(pid_t pid, void *),
349 /* Enables a watchdog and resets its timer. */
350 void lc_watchdog_touch_ms(struct lc_watchdog *lcw, int timeout_ms);
351 void lc_watchdog_touch(struct lc_watchdog *lcw);
353 /* Disable a watchdog; touch it to restart it. */
354 void lc_watchdog_disable(struct lc_watchdog *lcw);
356 /* Clean up the watchdog */
357 void lc_watchdog_delete(struct lc_watchdog *lcw);
359 /* Dump a debug log */
360 void lc_watchdog_dumplog(pid_t pid, void *data);
365 /* need both kernel and user-land acceptor */
366 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
367 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
370 * libcfs pseudo device operations
372 * struct cfs_psdev_t and
373 * cfs_psdev_register() and
374 * cfs_psdev_deregister() are declared in
375 * libcfs/<os>/cfs_prim.h
377 * It's just draft now.
380 struct cfs_psdev_file {
383 unsigned long reserved1;
384 unsigned long reserved2;
387 struct cfs_psdev_ops {
388 int (*p_open)(unsigned long, void *);
389 int (*p_close)(unsigned long, void *);
390 int (*p_read)(struct cfs_psdev_file *, char *, unsigned long);
391 int (*p_write)(struct cfs_psdev_file *, char *, unsigned long);
392 int (*p_ioctl)(struct cfs_psdev_file *, unsigned long, void *);
396 * generic time manipulation functions.
399 static inline int cfs_time_after(cfs_time_t t1, cfs_time_t t2)
401 return cfs_time_before(t2, t1);
404 static inline int cfs_time_aftereq(cfs_time_t t1, cfs_time_t t2)
406 return cfs_time_beforeq(t2, t1);
410 * return seconds since UNIX epoch
412 static inline time_t cfs_unix_seconds(void)
416 cfs_fs_time_current(&t);
417 return (time_t)cfs_fs_time_sec(&t);
420 static inline cfs_time_t cfs_time_shift(int seconds)
422 return cfs_time_add(cfs_time_current(), cfs_time_seconds(seconds));
425 static inline long cfs_timeval_sub(struct timeval *large, struct timeval *small,
426 struct timeval *result)
429 (large->tv_sec - small->tv_sec) * ONE_MILLION +
430 (large->tv_usec - small->tv_usec));
431 if (result != NULL) {
432 result->tv_usec = r % ONE_MILLION;
433 result->tv_sec = r / ONE_MILLION;
438 #define CFS_RATELIMIT(seconds) \
441 * XXX nikita: non-portable initializer \
443 static time_t __next_message = 0; \
446 if (cfs_time_after(cfs_time_current(), __next_message)) \
449 __next_message = cfs_time_shift(seconds); \
455 struct libcfs_debug_msg_data {
456 cfs_debug_limit_state_t *msg_cdls;
458 const char *msg_file;
463 #define DEBUG_MSG_DATA_INIT(cdls, subsystem, file, func, ln ) { \
464 .msg_cdls = (cdls), \
465 .msg_subsys = (subsystem), \
466 .msg_file = (file), \
472 extern int libcfs_debug_vmsg2(cfs_debug_limit_state_t *cdls,
473 int subsys, int mask,
474 const char *file, const char *fn, const int line,
475 const char *format1, va_list args,
476 const char *format2, ...)
477 __attribute__ ((format (printf, 9, 10)));
479 #define libcfs_debug_vmsg(cdls, subsys, mask, file, fn, line, format, args) \
480 libcfs_debug_vmsg2(cdls, subsys, mask, file, fn,line,format,args,NULL,NULL)
482 #define libcfs_debug_msg(cdls, subsys, mask, file, fn, line, format, a...) \
483 libcfs_debug_vmsg2(cdls, subsys, mask, file, fn,line,NULL,NULL,format, ##a)
485 #define cdebug_va(cdls, mask, file, func, line, fmt, args) do { \
488 if (((mask) & D_CANTMASK) != 0 || \
489 ((libcfs_debug & (mask)) != 0 && \
490 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
491 libcfs_debug_vmsg(cdls, DEBUG_SUBSYSTEM, (mask), \
492 (file), (func), (line), fmt, args); \
495 #define cdebug(cdls, mask, file, func, line, fmt, a...) do { \
498 if (((mask) & D_CANTMASK) != 0 || \
499 ((libcfs_debug & (mask)) != 0 && \
500 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
501 libcfs_debug_msg(cdls, DEBUG_SUBSYSTEM, (mask), \
502 (file), (func), (line), fmt, ## a); \
505 extern void libcfs_assertion_failed(const char *expr, const char *file,
506 const char *fn, const int line);
508 static inline void cfs_slow_warning(cfs_time_t now, int seconds, char *msg)
510 if (cfs_time_after(cfs_time_current(),
511 cfs_time_add(now, cfs_time_seconds(15))))
512 CERROR("slow %s %lu sec\n", msg,
513 cfs_duration_sec(cfs_time_sub(cfs_time_current(),now)));
517 * helper function similar to do_gettimeofday() of Linux kernel
519 static inline void cfs_fs_timeval(struct timeval *tv)
523 cfs_fs_time_current(&time);
524 cfs_fs_time_usec(&time, tv);
528 * return valid time-out based on user supplied one. Currently we only check
529 * that time-out is not shorted than allowed.
531 static inline cfs_duration_t cfs_timeout_cap(cfs_duration_t timeout)
533 if (timeout < CFS_TICK)
539 * Universal memory allocator API
541 enum cfs_alloc_flags {
542 /* allocation is not allowed to block */
543 CFS_ALLOC_ATOMIC = 0x1,
544 /* allocation is allowed to block */
545 CFS_ALLOC_WAIT = 0x2,
546 /* allocation should return zeroed memory */
547 CFS_ALLOC_ZERO = 0x4,
548 /* allocation is allowed to call file-system code to free/clean
551 /* allocation is allowed to do io to free/clean memory */
553 /* don't report allocation failure to the console */
554 CFS_ALLOC_NOWARN = 0x20,
555 /* standard allocator flag combination */
556 CFS_ALLOC_STD = CFS_ALLOC_FS | CFS_ALLOC_IO,
557 CFS_ALLOC_USER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO,
560 /* flags for cfs_page_alloc() in addition to enum cfs_alloc_flags */
561 enum cfs_alloc_page_flags {
562 /* allow to return page beyond KVM. It has to be mapped into KVM by
564 CFS_ALLOC_HIGH = 0x40,
565 CFS_ALLOC_HIGHUSER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO | CFS_ALLOC_HIGH,
569 * Drop into debugger, if possible. Implementation is provided by platform.
572 void cfs_enter_debugger(void);
575 * Defined by platform
577 void cfs_daemonize(char *str);
578 int cfs_daemonize_ctxt(char *str);
579 cfs_sigset_t cfs_get_blocked_sigs(void);
580 cfs_sigset_t cfs_block_allsigs(void);
581 cfs_sigset_t cfs_block_sigs(cfs_sigset_t bits);
582 void cfs_restore_sigs(cfs_sigset_t);
583 int cfs_signal_pending(void);
584 void cfs_clear_sigpending(void);
587 * these macros should be removed in the future,
588 * we keep them just for keeping libcfs compatible
589 * with other branches.
591 #define libcfs_daemonize(s) cfs_daemonize(s)
592 #define cfs_sigmask_lock(f) do { f= 0; } while (0)
593 #define cfs_sigmask_unlock(f) do { f= 0; } while (0)
595 int convert_server_error(__u64 ecode);
596 int convert_client_oflag(int cflag, int *result);
599 * Stack-tracing filling.
603 * Platform-dependent data-type to hold stack frames.
605 struct cfs_stack_trace;
608 * Fill @trace with current back-trace.
610 void cfs_stack_trace_fill(struct cfs_stack_trace *trace);
613 * Return instruction pointer for frame @frame_no. NULL if @frame_no is
616 void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no);
619 * Universal open flags.
621 #define CFS_O_ACCMODE 0003
622 #define CFS_O_CREAT 0100
623 #define CFS_O_EXCL 0200
624 #define CFS_O_NOCTTY 0400
625 #define CFS_O_TRUNC 01000
626 #define CFS_O_APPEND 02000
627 #define CFS_O_NONBLOCK 04000
628 #define CFS_O_NDELAY CFS_O_NONBLOCK
629 #define CFS_O_SYNC 010000
630 #define CFS_O_ASYNC 020000
631 #define CFS_O_DIRECT 040000
632 #define CFS_O_LARGEFILE 0100000
633 #define CFS_O_DIRECTORY 0200000
634 #define CFS_O_NOFOLLOW 0400000
635 #define CFS_O_NOATIME 01000000
637 /* convert local open flags to universal open flags */
638 int cfs_oflags2univ(int flags);
639 /* convert universal open flags to local open flags */
640 int cfs_univ2oflags(int flags);
644 #endif /* _LIBCFS_H */