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); \
47 __ptr ? container_of(__ptr, type, member) : NULL; \
51 * true iff @i is power-of-2
61 #define LOWEST_BIT_SET(x) ((x) & ~((x) - 1))
66 extern unsigned int libcfs_subsystem_debug;
67 extern unsigned int libcfs_stack;
68 extern unsigned int libcfs_debug;
69 extern unsigned int libcfs_printk;
70 extern unsigned int libcfs_console_ratelimit;
71 extern unsigned int libcfs_debug_binary;
72 extern char debug_file_path[1024];
74 int libcfs_debug_mask2str(char *str, int size, int mask, int is_subsys);
75 int libcfs_debug_str2mask(int *mask, const char *str, int is_subsys);
77 /* Has there been an LBUG? */
78 extern unsigned int libcfs_catastrophe;
79 extern unsigned int libcfs_panic_on_lbug;
82 * struct ptldebug_header is defined in libcfs/<os>/libcfs.h
85 #define PH_FLAG_FIRST_RECORD 1
87 /* Debugging subsystems (32 bits, non-overlapping) */
88 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
89 #define S_UNDEFINED 0x00000001
90 #define S_MDC 0x00000002
91 #define S_MDS 0x00000004
92 #define S_OSC 0x00000008
93 #define S_OST 0x00000010
94 #define S_CLASS 0x00000020
95 #define S_LOG 0x00000040
96 #define S_LLITE 0x00000080
97 #define S_RPC 0x00000100
98 #define S_MGMT 0x00000200
99 #define S_LNET 0x00000400
100 #define S_LND 0x00000800 /* ALL LNDs */
101 #define S_PINGER 0x00001000
102 #define S_FILTER 0x00002000
104 #define S_ECHO 0x00008000
105 #define S_LDLM 0x00010000
106 #define S_LOV 0x00020000
112 #define S_LMV 0x00800000 /* b_new_cmd */
114 #define S_SEC 0x02000000 /* upcall cache */
115 #define S_GSS 0x04000000 /* b_new_cmd */
117 #define S_MGC 0x10000000
118 #define S_MGS 0x20000000
119 #define S_FID 0x40000000 /* b_new_cmd */
120 #define S_FLD 0x80000000 /* b_new_cmd */
121 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
123 /* Debugging masks (32 bits, non-overlapping) */
124 /* keep these in sync with lnet/utils/debug.c and lnet/libcfs/debug.c */
125 #define D_TRACE 0x00000001 /* ENTRY/EXIT markers */
126 #define D_INODE 0x00000002
127 #define D_SUPER 0x00000004
128 #define D_EXT2 0x00000008 /* anything from ext2_debug */
129 #define D_MALLOC 0x00000010 /* print malloc, free information */
130 #define D_CACHE 0x00000020 /* cache-related items */
131 #define D_INFO 0x00000040 /* general information */
132 #define D_IOCTL 0x00000080 /* ioctl related information */
133 #define D_NETERROR 0x00000100 /* network errors */
134 #define D_NET 0x00000200 /* network communications */
135 #define D_WARNING 0x00000400 /* CWARN(...) == CDEBUG (D_WARNING, ...) */
136 #define D_BUFFS 0x00000800
137 #define D_OTHER 0x00001000
138 #define D_DENTRY 0x00002000
139 #define D_NETTRACE 0x00004000
140 #define D_PAGE 0x00008000 /* bulk page handling */
141 #define D_DLMTRACE 0x00010000
142 #define D_ERROR 0x00020000 /* CERROR(...) == CDEBUG (D_ERROR, ...) */
143 #define D_EMERG 0x00040000 /* CEMERG(...) == CDEBUG (D_EMERG, ...) */
144 #define D_HA 0x00080000 /* recovery and failover */
145 #define D_RPCTRACE 0x00100000 /* for distributed debugging */
146 #define D_VFSTRACE 0x00200000
147 #define D_READA 0x00400000 /* read-ahead */
148 #define D_MMAP 0x00800000
149 #define D_CONFIG 0x01000000
150 #define D_CONSOLE 0x02000000
151 #define D_QUOTA 0x04000000
152 #define D_SEC 0x08000000
153 /* keep these in sync with lnet/{utils,libcfs}/debug.c */
155 #define D_CANTMASK (D_ERROR | D_EMERG | D_WARNING | D_CONSOLE)
157 #ifndef DEBUG_SUBSYSTEM
158 # define DEBUG_SUBSYSTEM S_UNDEFINED
161 #define CDEBUG_MAX_LIMIT 600
163 cfs_time_t cdls_next;
165 cfs_duration_t cdls_delay;
166 } cfs_debug_limit_state_t;
168 /* Controlled via configure key */
169 /* #define CDEBUG_ENABLED */
173 #ifdef CDEBUG_ENABLED
174 #define __CDEBUG(cdls, mask, format, a...) \
178 if (((mask) & D_CANTMASK) != 0 || \
179 ((libcfs_debug & (mask)) != 0 && \
180 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
181 libcfs_debug_msg(cdls, DEBUG_SUBSYSTEM, mask, \
182 __FILE__, __FUNCTION__, __LINE__, \
186 #define CDEBUG(mask, format, a...) __CDEBUG(NULL, mask, format, ## a)
188 #define CDEBUG_LIMIT(mask, format, a...) \
190 static cfs_debug_limit_state_t cdls; \
192 __CDEBUG(&cdls, mask, format, ## a); \
195 #else /* CDEBUG_ENABLED */
196 #define CDEBUG(mask, format, a...) (void)(0)
197 #define CDEBUG_LIMIT(mask, format, a...) (void)(0)
198 #warning "CDEBUG IS DISABLED. THIS SHOULD NEVER BE DONE FOR PRODUCTION!"
201 #elif defined(__arch_lib__) && !defined(LUSTRE_UTILS)
203 #define CDEBUG(mask, format, a...) \
205 if (((mask) & D_CANTMASK) != 0 || \
206 ((libcfs_debug & (mask)) != 0 && \
207 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
208 libcfs_debug_msg(NULL, DEBUG_SUBSYSTEM, mask, \
209 __FILE__, __FUNCTION__, __LINE__, \
213 #define CDEBUG_LIMIT CDEBUG
217 #define CDEBUG(mask, format, a...) \
219 if (((mask) & D_CANTMASK) != 0) \
220 fprintf(stderr, "(%s:%d:%s()) " format, \
221 __FILE__, __LINE__, __FUNCTION__, ## a); \
224 #define CDEBUG_LIMIT CDEBUG
226 #endif /* !__KERNEL__ */
229 * Lustre Error Checksum: calculates checksum
230 * of Hex number by XORing each bit.
232 #define LERRCHKSUM(hexnum) (((hexnum) & 0xf) ^ ((hexnum) >> 4 & 0xf) ^ \
233 ((hexnum) >> 8 & 0xf))
235 #define CWARN(format, a...) CDEBUG_LIMIT(D_WARNING, format, ## a)
236 #define CERROR(format, a...) CDEBUG_LIMIT(D_ERROR, format, ## a)
237 #define CEMERG(format, a...) CDEBUG_LIMIT(D_EMERG, format, ## a)
239 #define LCONSOLE(mask, format, a...) CDEBUG(D_CONSOLE | (mask), format, ## a)
240 #define LCONSOLE_INFO(format, a...) CDEBUG_LIMIT(D_CONSOLE, format, ## a)
241 #define LCONSOLE_WARN(format, a...) CDEBUG_LIMIT(D_CONSOLE | D_WARNING, format, ## a)
242 #define LCONSOLE_ERROR_MSG(errnum, format, a...) CDEBUG_LIMIT(D_CONSOLE | D_ERROR, \
243 "%x-%x: " format, errnum, LERRCHKSUM(errnum), ## a)
244 #define LCONSOLE_ERROR(format, a...) LCONSOLE_ERROR_MSG(0x00, format, ## a)
246 #define LCONSOLE_EMERG(format, a...) CDEBUG(D_CONSOLE | D_EMERG, format, ## a)
248 #ifdef CDEBUG_ENABLED
250 #define GOTO(label, rc) \
252 long GOTO__ret = (long)(rc); \
253 CDEBUG(D_TRACE,"Process leaving via %s (rc=%lu : %ld : %lx)\n", \
254 #label, (unsigned long)GOTO__ret, (signed long)GOTO__ret,\
255 (signed long)GOTO__ret); \
259 #define GOTO(label, rc) do { ((void)(rc)); goto label; } while (0)
262 /* Controlled via configure key */
263 /* #define CDEBUG_ENTRY_EXIT */
265 #ifdef CDEBUG_ENTRY_EXIT
268 * if rc == NULL, we need to code as RETURN((void *)NULL), otherwise
269 * there will be a warning in osx.
273 typeof(rc) RETURN__ret = (rc); \
274 CDEBUG(D_TRACE, "Process leaving (rc=%lu : %ld : %lx)\n", \
275 (long)RETURN__ret, (long)RETURN__ret, (long)RETURN__ret);\
277 return RETURN__ret; \
283 CDEBUG(D_TRACE, "Process entered\n"); \
288 CDEBUG(D_TRACE, "Process leaving\n"); \
291 #else /* !CDEBUG_ENTRY_EXIT */
293 #define RETURN(rc) return (rc)
294 #define ENTRY do { } while (0)
295 #define EXIT do { } while (0)
297 #endif /* !CDEBUG_ENTRY_EXIT */
300 * Some (nomina odiosa sunt) platforms define NULL as naked 0. This confuses
301 * Lustre RETURN(NULL) macro.
307 #define NULL ((void *)0)
309 #define LUSTRE_SRV_LNET_PID LUSTRE_LNET_PID
313 #include <libcfs/list.h>
315 struct libcfs_ioctl_data; /* forward ref */
317 struct libcfs_ioctl_handler {
318 struct list_head item;
319 int (*handle_ioctl)(unsigned int cmd, struct libcfs_ioctl_data *data);
322 #define DECLARE_IOCTL_HANDLER(ident, func) \
323 struct libcfs_ioctl_handler ident = { \
324 /* .item = */ CFS_LIST_HEAD_INIT(ident.item), \
325 /* .handle_ioctl = */ func \
328 int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand);
329 int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand);
332 #define LNET_ACCEPTOR_MIN_RESERVED_PORT 512
333 #define LNET_ACCEPTOR_MAX_RESERVED_PORT 1023
335 int libcfs_ipif_query(char *name, int *up, __u32 *ip, __u32 *mask);
336 int libcfs_ipif_enumerate(char ***names);
337 void libcfs_ipif_free_enumeration(char **names, int n);
338 int libcfs_sock_listen(cfs_socket_t **sockp, __u32 ip, int port, int backlog);
339 int libcfs_sock_accept(cfs_socket_t **newsockp, cfs_socket_t *sock);
340 void libcfs_sock_abort_accept(cfs_socket_t *sock);
341 int libcfs_sock_connect(cfs_socket_t **sockp, int *fatal,
342 __u32 local_ip, int local_port,
343 __u32 peer_ip, int peer_port);
344 int libcfs_sock_setbuf(cfs_socket_t *socket, int txbufsize, int rxbufsize);
345 int libcfs_sock_getbuf(cfs_socket_t *socket, int *txbufsize, int *rxbufsize);
346 int libcfs_sock_getaddr(cfs_socket_t *socket, int remote, __u32 *ip, int *port);
347 int libcfs_sock_write(cfs_socket_t *sock, void *buffer, int nob, int timeout);
348 int libcfs_sock_read(cfs_socket_t *sock, void *buffer, int nob, int timeout);
349 void libcfs_sock_release(cfs_socket_t *sock);
351 /* libcfs watchdogs */
354 /* Add a watchdog which fires after "time" milliseconds of delay. You have to
355 * touch it once to enable it. */
356 struct lc_watchdog *lc_watchdog_add(int time,
357 void (*cb)(pid_t pid, void *),
360 /* Enables a watchdog and resets its timer. */
361 void lc_watchdog_touch(struct lc_watchdog *lcw);
363 /* Disable a watchdog; touch it to restart it. */
364 void lc_watchdog_disable(struct lc_watchdog *lcw);
366 /* Clean up the watchdog */
367 void lc_watchdog_delete(struct lc_watchdog *lcw);
369 /* Dump a debug log */
370 void lc_watchdog_dumplog(pid_t pid, void *data);
376 * libcfs pseudo device operations
378 * struct cfs_psdev_t and
379 * cfs_psdev_register() and
380 * cfs_psdev_deregister() are declared in
381 * libcfs/<os>/cfs_prim.h
383 * It's just draft now.
386 struct cfs_psdev_file {
389 unsigned long reserved1;
390 unsigned long reserved2;
393 struct cfs_psdev_ops {
394 int (*p_open)(unsigned long, void *);
395 int (*p_close)(unsigned long, void *);
396 int (*p_read)(struct cfs_psdev_file *, char *, unsigned long);
397 int (*p_write)(struct cfs_psdev_file *, char *, unsigned long);
398 int (*p_ioctl)(struct cfs_psdev_file *, unsigned long, void *);
402 * generic time manipulation functions.
405 static inline int cfs_time_after(cfs_time_t t1, cfs_time_t t2)
407 return cfs_time_before(t2, t1);
410 static inline int cfs_time_aftereq(cfs_time_t t1, cfs_time_t t2)
412 return cfs_time_beforeq(t2, t1);
416 * return seconds since UNIX epoch
418 static inline time_t cfs_unix_seconds(void)
422 cfs_fs_time_current(&t);
423 return (time_t)cfs_fs_time_sec(&t);
426 static inline cfs_time_t cfs_time_shift(int seconds)
428 return cfs_time_add(cfs_time_current(), cfs_time_seconds(seconds));
431 static inline long cfs_timeval_sub(struct timeval *large, struct timeval *small,
432 struct timeval *result)
435 (large->tv_sec - small->tv_sec) * ONE_MILLION +
436 (large->tv_usec - small->tv_usec));
437 if (result != NULL) {
438 result->tv_usec = r % ONE_MILLION;
439 result->tv_sec = r / ONE_MILLION;
444 #define CFS_RATELIMIT(seconds) \
447 * XXX nikita: non-portable initializer \
449 static time_t __next_message = 0; \
452 if (cfs_time_after(cfs_time_current(), __next_message)) \
455 __next_message = cfs_time_shift(seconds); \
461 struct libcfs_debug_msg_data {
462 cfs_debug_limit_state_t *msg_cdls;
464 const char *msg_file;
469 #define DEBUG_MSG_DATA_INIT(cdls, subsystem, file, func, ln ) { \
470 .msg_cdls = (cdls), \
471 .msg_subsys = (subsystem), \
472 .msg_file = (file), \
478 extern int libcfs_debug_vmsg2(cfs_debug_limit_state_t *cdls,
479 int subsys, int mask,
480 const char *file, const char *fn, const int line,
481 const char *format1, va_list args,
482 const char *format2, ...)
483 __attribute__ ((format (printf, 9, 10)));
485 #define libcfs_debug_vmsg(cdls, subsys, mask, file, fn, line, format, args) \
486 libcfs_debug_vmsg2(cdls, subsys, mask, file, fn,line,format,args,NULL,NULL)
488 #define libcfs_debug_msg(cdls, subsys, mask, file, fn, line, format, a...) \
489 libcfs_debug_vmsg2(cdls, subsys, mask, file, fn,line,NULL,NULL,format, ##a)
491 #define cdebug_va(cdls, mask, file, func, line, fmt, args) do { \
494 if (((mask) & D_CANTMASK) != 0 || \
495 ((libcfs_debug & (mask)) != 0 && \
496 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
497 libcfs_debug_vmsg(cdls, DEBUG_SUBSYSTEM, (mask), \
498 (file), (func), (line), fmt, args); \
501 #define cdebug(cdls, mask, file, func, line, fmt, a...) do { \
504 if (((mask) & D_CANTMASK) != 0 || \
505 ((libcfs_debug & (mask)) != 0 && \
506 (libcfs_subsystem_debug & DEBUG_SUBSYSTEM) != 0)) \
507 libcfs_debug_msg(cdls, DEBUG_SUBSYSTEM, (mask), \
508 (file), (func), (line), fmt, ## a); \
511 extern void libcfs_assertion_failed(const char *expr, const char *file,
512 const char *fn, const int line);
514 static inline void cfs_slow_warning(cfs_time_t now, int seconds, char *msg)
516 if (cfs_time_after(cfs_time_current(),
517 cfs_time_add(now, cfs_time_seconds(15))))
518 CERROR("slow %s %lu sec\n", msg,
519 cfs_duration_sec(cfs_time_sub(cfs_time_current(),now)));
523 * helper function similar to do_gettimeofday() of Linux kernel
525 static inline void cfs_fs_timeval(struct timeval *tv)
529 cfs_fs_time_current(&time);
530 cfs_fs_time_usec(&time, tv);
534 * return valid time-out based on user supplied one. Currently we only check
535 * that time-out is not shorted than allowed.
537 static inline cfs_duration_t cfs_timeout_cap(cfs_duration_t timeout)
539 if (timeout < CFS_TICK)
545 * Universal memory allocator API
547 enum cfs_alloc_flags {
548 /* allocation is not allowed to block */
549 CFS_ALLOC_ATOMIC = 0x1,
550 /* allocation is allowed to block */
551 CFS_ALLOC_WAIT = 0x2,
552 /* allocation should return zeroed memory */
553 CFS_ALLOC_ZERO = 0x4,
554 /* allocation is allowed to call file-system code to free/clean
557 /* allocation is allowed to do io to free/clean memory */
559 /* don't report allocation failure to the console */
560 CFS_ALLOC_NOWARN = 0x20,
561 /* standard allocator flag combination */
562 CFS_ALLOC_STD = CFS_ALLOC_FS | CFS_ALLOC_IO,
563 CFS_ALLOC_USER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO,
566 /* flags for cfs_page_alloc() in addition to enum cfs_alloc_flags */
567 enum cfs_alloc_page_flags {
568 /* allow to return page beyond KVM. It has to be mapped into KVM by
570 CFS_ALLOC_HIGH = 0x40,
571 CFS_ALLOC_HIGHUSER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO | CFS_ALLOC_HIGH,
575 * portable UNIX device file identification. (This is not _very_
576 * portable. Probably makes no sense for Windows.)
584 typedef unsigned int cfs_major_nr_t;
585 typedef unsigned int cfs_minor_nr_t;
588 * Defined by platform.
590 cfs_rdev_t cfs_rdev_build(cfs_major_nr_t major, cfs_minor_nr_t minor);
591 cfs_major_nr_t cfs_rdev_major(cfs_rdev_t rdev);
592 cfs_minor_nr_t cfs_rdev_minor(cfs_rdev_t rdev);
595 * Generic on-wire rdev format.
598 typedef __u32 cfs_wire_rdev_t;
600 cfs_wire_rdev_t cfs_wire_rdev_build(cfs_major_nr_t major, cfs_minor_nr_t minor);
601 cfs_major_nr_t cfs_wire_rdev_major(cfs_wire_rdev_t rdev);
602 cfs_minor_nr_t cfs_wire_rdev_minor(cfs_wire_rdev_t rdev);
605 * Drop into debugger, if possible. Implementation is provided by platform.
608 void cfs_enter_debugger(void);
611 * Defined by platform
613 void cfs_daemonize(char *str);
614 int cfs_daemonize_ctxt(char *str);
615 cfs_sigset_t cfs_get_blocked_sigs(void);
616 cfs_sigset_t cfs_block_allsigs(void);
617 cfs_sigset_t cfs_block_sigs(cfs_sigset_t bits);
618 void cfs_restore_sigs(cfs_sigset_t);
619 int cfs_signal_pending(void);
620 void cfs_clear_sigpending(void);
623 * these macros should be removed in the future,
624 * we keep them just for keeping libcfs compatible
625 * with other branches.
627 #define libcfs_daemonize(s) cfs_daemonize(s)
628 #define cfs_sigmask_lock(f) do { f= 0; } while (0)
629 #define cfs_sigmask_unlock(f) do { f= 0; } while (0)
631 int convert_server_error(__u64 ecode);
632 int convert_client_oflag(int cflag, int *result);
635 * Stack-tracing filling.
639 * Platform-dependent data-type to hold stack frames.
641 struct cfs_stack_trace;
644 * Fill @trace with current back-trace.
646 void cfs_stack_trace_fill(struct cfs_stack_trace *trace);
649 * Return instruction pointer for frame @frame_no. NULL if @frame_no is
652 void *cfs_stack_trace_frame(struct cfs_stack_trace *trace, int frame_no);
655 * Universal open flags.
657 #define CFS_O_ACCMODE 0003
658 #define CFS_O_CREAT 0100
659 #define CFS_O_EXCL 0200
660 #define CFS_O_NOCTTY 0400
661 #define CFS_O_TRUNC 01000
662 #define CFS_O_APPEND 02000
663 #define CFS_O_NONBLOCK 04000
664 #define CFS_O_NDELAY CFS_O_NONBLOCK
665 #define CFS_O_SYNC 010000
666 #define CFS_O_ASYNC 020000
667 #define CFS_O_DIRECT 040000
668 #define CFS_O_LARGEFILE 0100000
669 #define CFS_O_DIRECTORY 0200000
670 #define CFS_O_NOFOLLOW 0400000
671 #define CFS_O_NOATIME 01000000
673 /* convert local open flags to universal open flags */
674 int cfs_oflags2univ(int flags);
675 /* convert universal open flags to local open flags */
676 int cfs_univ2oflags(int flags);
680 #endif /* _LIBCFS_H */