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
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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 (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
32 * Copyright (c) 2011, Whamcloud, Inc.
35 * This file is part of Lustre, http://www.lustre.org/
36 * Lustre is a trademark of Sun Microsystems, Inc.
38 * libcfs/include/libcfs/libcfs_private.h
40 * Various defines for libcfs.
44 #ifndef __LIBCFS_PRIVATE_H__
45 #define __LIBCFS_PRIVATE_H__
47 /* XXX this layering violation is for nidstrings */
48 #include <lnet/types.h>
50 #ifndef DEBUG_SUBSYSTEM
51 # define DEBUG_SUBSYSTEM S_UNDEFINED
59 * When this is on, LASSERT macro includes check for assignment used instead
60 * of equality check, but doesn't have unlikely(). Turn this on from time to
61 * time to make test-builds. This shouldn't be on for production release.
63 #define LASSERT_CHECKED (0)
69 * Strange construction with empty "then" clause is used to trigger compiler
70 * warnings on the assertions of the form LASSERT(a = b);
72 * "warning: suggest parentheses around assignment used as truth value"
74 * requires -Wall. Unfortunately this rules out use of likely/unlikely.
76 #define LASSERT(cond) \
81 libcfs_assertion_failed( #cond , __FILE__, \
82 __FUNCTION__, __LINE__); \
85 #define LASSERTF(cond, fmt, ...) \
90 libcfs_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
91 __FILE__, __FUNCTION__,__LINE__, \
92 "ASSERTION(" #cond ") failed: " fmt, \
98 #else /* !LASSERT_CHECKED */
100 #define LASSERT(cond) \
102 if (unlikely(!(cond))) \
103 libcfs_assertion_failed(#cond , __FILE__, \
104 __FUNCTION__, __LINE__); \
107 #define LASSERTF(cond, fmt, ...) \
109 if (unlikely(!(cond))) { \
110 libcfs_debug_msg(NULL, DEBUG_SUBSYSTEM, D_EMERG, \
111 __FILE__, __FUNCTION__,__LINE__, \
112 "ASSERTION(" #cond ") failed: " fmt, \
118 #endif /* !LASSERT_CHECKED */
119 #else /* !LIBCFS_DEBUG */
120 /* sizeof is to use expression without evaluating it. */
121 # define LASSERT(e) ((void)sizeof!!(e))
122 # define LASSERTF(cond, ...) ((void)sizeof!!(cond))
123 #endif /* !LIBCFS_DEBUG */
125 #ifdef INVARIANT_CHECK
127 * This is for more expensive checks that one doesn't want to be enabled all
128 * the time. LINVRNT() has to be explicitly enabled by --enable-invariants
131 # define LINVRNT(exp) LASSERT(exp)
133 # define LINVRNT(exp) ((void)sizeof!!(exp))
136 #define KLASSERT(e) LASSERT(e)
138 void lbug_with_loc(const char *file, const char *func, const int line)
139 __attribute__((noreturn));
141 #define LBUG() lbug_with_loc(__FILE__, __FUNCTION__, __LINE__)
143 extern cfs_atomic_t libcfs_kmemory;
149 # define libcfs_kmem_inc(ptr, size) \
151 cfs_atomic_add(size, &libcfs_kmemory); \
154 # define libcfs_kmem_dec(ptr, size) do { \
155 cfs_atomic_sub(size, &libcfs_kmemory); \
159 # define libcfs_kmem_inc(ptr, size) do {} while (0)
160 # define libcfs_kmem_dec(ptr, size) do {} while (0)
161 #endif /* LIBCFS_DEBUG */
163 #ifndef LIBCFS_VMALLOC_SIZE
164 #define LIBCFS_VMALLOC_SIZE (2 << CFS_PAGE_SHIFT) /* 2 pages */
167 #define LIBCFS_ALLOC_GFP(ptr, size, mask) \
169 LASSERT(!cfs_in_interrupt() || \
170 (size <= LIBCFS_VMALLOC_SIZE && mask == CFS_ALLOC_ATOMIC));\
171 if (unlikely((size) > LIBCFS_VMALLOC_SIZE)) \
172 (ptr) = cfs_alloc_large(size); \
174 (ptr) = cfs_alloc((size), (mask)); \
175 if (unlikely((ptr) == NULL)) { \
176 CERROR("LNET: out of memory at %s:%d (tried to alloc '" \
177 #ptr "' = %d)\n", __FILE__, __LINE__, (int)(size));\
178 CERROR("LNET: %d total bytes allocated by lnet\n", \
179 cfs_atomic_read(&libcfs_kmemory)); \
182 libcfs_kmem_inc((ptr), (size)); \
183 memset((ptr), 0, (size)); \
184 CDEBUG(D_MALLOC, "kmalloced '" #ptr "': %d at %p (tot %d).\n", \
185 (int)(size), (ptr), cfs_atomic_read (&libcfs_kmemory)); \
188 #define LIBCFS_ALLOC(ptr, size) \
189 LIBCFS_ALLOC_GFP(ptr, size, CFS_ALLOC_IO)
191 #define LIBCFS_ALLOC_ATOMIC(ptr, size) \
192 LIBCFS_ALLOC_GFP(ptr, size, CFS_ALLOC_ATOMIC)
194 #define LIBCFS_FREE(ptr, size) \
197 if (unlikely((ptr) == NULL)) { \
198 CERROR("LIBCFS: free NULL '" #ptr "' (%d bytes) at " \
199 "%s:%d\n", s, __FILE__, __LINE__); \
202 libcfs_kmem_dec((ptr), s); \
203 CDEBUG(D_MALLOC, "kfreed '" #ptr "': %d at %p (tot %d).\n", \
204 s, (ptr), cfs_atomic_read(&libcfs_kmemory)); \
205 if (unlikely(s > LIBCFS_VMALLOC_SIZE)) \
206 cfs_free_large(ptr); \
211 /******************************************************************************/
213 /* htonl hack - either this, or compile with -O2. Stupid byteorder/generic.h */
214 #if defined(__GNUC__) && (__GNUC__ >= 2) && !defined(__OPTIMIZE__)
215 #define ___htonl(x) __cpu_to_be32(x)
216 #define ___htons(x) __cpu_to_be16(x)
217 #define ___ntohl(x) __be32_to_cpu(x)
218 #define ___ntohs(x) __be16_to_cpu(x)
219 #define htonl(x) ___htonl(x)
220 #define ntohl(x) ___ntohl(x)
221 #define htons(x) ___htons(x)
222 #define ntohs(x) ___ntohs(x)
225 void libcfs_debug_dumpstack(cfs_task_t *tsk);
226 void libcfs_run_upcall(char **argv);
227 void libcfs_run_lbug_upcall(const char * file, const char *fn, const int line);
228 void libcfs_debug_dumplog(void);
229 int libcfs_debug_init(unsigned long bufsize);
230 int libcfs_debug_cleanup(void);
231 int libcfs_debug_clear_buffer(void);
232 int libcfs_debug_mark_buffer(const char *text);
234 void libcfs_debug_set_level(unsigned int debug_level);
236 #else /* !__KERNEL__ */
240 # define LASSERT(e) assert(e)
241 # define LASSERTF(cond, ...) \
244 CERROR(__VA_ARGS__); \
247 # define LBUG() assert(0)
248 # ifdef INVARIANT_CHECK
249 # define LINVRNT(exp) LASSERT(exp)
251 # define LINVRNT(exp) ((void)sizeof!!(exp))
254 # define LASSERT(e) ((void)sizeof!!(e))
255 # define LASSERTF(cond, ...) ((void)sizeof!!(cond))
256 # define LBUG() ((void)(0))
257 # define LINVRNT(exp) ((void)sizeof!!(exp))
258 # endif /* LIBCFS_DEBUG */
259 # define KLASSERT(e) ((void)0)
260 # define printk printf
261 # ifdef CRAY_XT3 /* buggy calloc! */
262 # define LIBCFS_ALLOC(ptr, size) \
264 (ptr) = malloc(size); \
265 memset(ptr, 0, size); \
268 # define LIBCFS_ALLOC(ptr, size) do { (ptr) = calloc(1,size); } while (0)
270 # define LIBCFS_FREE(ptr, size) do { free(ptr); } while((size) - (size))
272 void libcfs_debug_dumplog(void);
273 int libcfs_debug_init(unsigned long bufsize);
274 int libcfs_debug_cleanup(void);
276 #define libcfs_debug_dumpstack(tsk) ((void)0)
279 * Generic compiler-dependent macros required for kernel
280 * build go below this comment. Actual compiler/compiler version
281 * specific implementations come from the above header files
284 #define likely(x) __builtin_expect(!!(x), 1)
285 #define unlikely(x) __builtin_expect(!!(x), 0)
287 #define likely(x) (!!(x))
288 #define unlikely(x) (!!(x))
293 #define LASSERT_ATOMIC_ENABLED (1)
295 #if LASSERT_ATOMIC_ENABLED
297 /** assert value of @a is equal to @v */
298 #define LASSERT_ATOMIC_EQ(a, v) \
300 LASSERTF(cfs_atomic_read(a) == v, \
301 "value: %d\n", cfs_atomic_read((a))); \
304 /** assert value of @a is unequal to @v */
305 #define LASSERT_ATOMIC_NE(a, v) \
307 LASSERTF(cfs_atomic_read(a) != v, \
308 "value: %d\n", cfs_atomic_read((a))); \
311 /** assert value of @a is little than @v */
312 #define LASSERT_ATOMIC_LT(a, v) \
314 LASSERTF(cfs_atomic_read(a) < v, \
315 "value: %d\n", cfs_atomic_read((a))); \
318 /** assert value of @a is little/equal to @v */
319 #define LASSERT_ATOMIC_LE(a, v) \
321 LASSERTF(cfs_atomic_read(a) <= v, \
322 "value: %d\n", cfs_atomic_read((a))); \
325 /** assert value of @a is great than @v */
326 #define LASSERT_ATOMIC_GT(a, v) \
328 LASSERTF(cfs_atomic_read(a) > v, \
329 "value: %d\n", cfs_atomic_read((a))); \
332 /** assert value of @a is great/equal to @v */
333 #define LASSERT_ATOMIC_GE(a, v) \
335 LASSERTF(cfs_atomic_read(a) >= v, \
336 "value: %d\n", cfs_atomic_read((a))); \
339 /** assert value of @a is great than @v1 and little than @v2 */
340 #define LASSERT_ATOMIC_GT_LT(a, v1, v2) \
342 int __v = cfs_atomic_read(a); \
343 LASSERTF(__v > v1 && __v < v2, "value: %d\n", __v); \
346 /** assert value of @a is great than @v1 and little/equal to @v2 */
347 #define LASSERT_ATOMIC_GT_LE(a, v1, v2) \
349 int __v = cfs_atomic_read(a); \
350 LASSERTF(__v > v1 && __v <= v2, "value: %d\n", __v); \
353 /** assert value of @a is great/equal to @v1 and little than @v2 */
354 #define LASSERT_ATOMIC_GE_LT(a, v1, v2) \
356 int __v = cfs_atomic_read(a); \
357 LASSERTF(__v >= v1 && __v < v2, "value: %d\n", __v); \
360 /** assert value of @a is great/equal to @v1 and little/equal to @v2 */
361 #define LASSERT_ATOMIC_GE_LE(a, v1, v2) \
363 int __v = cfs_atomic_read(a); \
364 LASSERTF(__v >= v1 && __v <= v2, "value: %d\n", __v); \
367 #else /* !LASSERT_ATOMIC_ENABLED */
369 #define LASSERT_ATOMIC_EQ(a, v) do {} while (0)
370 #define LASSERT_ATOMIC_NE(a, v) do {} while (0)
371 #define LASSERT_ATOMIC_LT(a, v) do {} while (0)
372 #define LASSERT_ATOMIC_LE(a, v) do {} while (0)
373 #define LASSERT_ATOMIC_GT(a, v) do {} while (0)
374 #define LASSERT_ATOMIC_GE(a, v) do {} while (0)
375 #define LASSERT_ATOMIC_GT_LT(a, v1, v2) do {} while (0)
376 #define LASSERT_ATOMIC_GT_LE(a, v1, v2) do {} while (0)
377 #define LASSERT_ATOMIC_GE_LT(a, v1, v2) do {} while (0)
378 #define LASSERT_ATOMIC_GE_LE(a, v1, v2) do {} while (0)
380 #endif /* LASSERT_ATOMIC_ENABLED */
382 #define LASSERT_ATOMIC_ZERO(a) LASSERT_ATOMIC_EQ(a, 0)
383 #define LASSERT_ATOMIC_POS(a) LASSERT_ATOMIC_GT(a, 0)
385 #define CFS_ALLOC_PTR(ptr) LIBCFS_ALLOC(ptr, sizeof (*(ptr)));
386 #define CFS_FREE_PTR(ptr) LIBCFS_FREE(ptr, sizeof (*(ptr)));
388 /** Compile-time assertion.
390 * Check an invariant described by a constant expression at compile time by
391 * forcing a compiler error if it does not hold. \a cond must be a constant
392 * expression as defined by the ISO C Standard:
394 * 6.8.4.2 The switch statement
396 * [#3] The expression of each case label shall be an integer
397 * constant expression and no two of the case constant
398 * expressions in the same switch statement shall have the same
399 * value after conversion...
402 #define CLASSERT(cond) do {switch(42) {case (cond): case 0: break;}} while (0)
404 /* support decl needed both by kernel and liblustre */
405 int libcfs_isknown_lnd(int type);
406 char *libcfs_lnd2modname(int type);
407 char *libcfs_lnd2str(int type);
408 int libcfs_str2lnd(const char *str);
409 char *libcfs_net2str(__u32 net);
410 char *libcfs_nid2str(lnet_nid_t nid);
411 __u32 libcfs_str2net(const char *str);
412 lnet_nid_t libcfs_str2nid(const char *str);
413 int libcfs_str2anynid(lnet_nid_t *nid, const char *str);
414 char *libcfs_id2str(lnet_process_id_t id);
415 int cfs_iswhite(char c);
416 void cfs_free_nidlist(cfs_list_t *list);
417 int cfs_parse_nidlist(char *str, int len, cfs_list_t *list);
418 int cfs_match_nid(lnet_nid_t nid, cfs_list_t *list);
420 /** \addtogroup lnet_addr
422 /* how an LNET NID encodes net:address */
423 /** extract the address part of an lnet_nid_t */
424 #define LNET_NIDADDR(nid) ((__u32)((nid) & 0xffffffff))
425 /** extract the network part of an lnet_nid_t */
426 #define LNET_NIDNET(nid) ((__u32)(((nid) >> 32)) & 0xffffffff)
427 /** make an lnet_nid_t from a network part and an address part */
428 #define LNET_MKNID(net,addr) ((((__u64)(net))<<32)|((__u64)(addr)))
429 /* how net encodes type:number */
430 #define LNET_NETNUM(net) ((net) & 0xffff)
431 #define LNET_NETTYP(net) (((net) >> 16) & 0xffff)
432 #define LNET_MKNET(typ,num) ((((__u32)(typ))<<16)|((__u32)(num)))
435 /* max value for numeric network address */
436 #define MAX_NUMERIC_VALUE 0xffffffff
439 #define ergo(a, b) (!(a) || (b))
440 /* logical equivalence */
441 #define equi(a, b) (!!(a) == !!(b))
443 #ifndef CFS_CURRENT_TIME
444 # define CFS_CURRENT_TIME time(0)
447 /* --------------------------------------------------------------------
449 * Support for temporary event tracing with minimal Heisenberg effect.
450 * All stuff about lwt are put in arch/kp30.h
451 * -------------------------------------------------------------------- */
453 struct libcfs_device_userstate
455 int ldu_memhog_pages;
456 cfs_page_t *ldu_memhog_root_page;
459 /* what used to be in portals_lib.h */
461 # define MIN(a,b) (((a)<(b)) ? (a): (b))
464 # define MAX(a,b) (((a)>(b)) ? (a): (b))
467 #define MKSTR(ptr) ((ptr))? (ptr) : ""
469 static inline int cfs_size_round4 (int val)
471 return (val + 3) & (~0x3);
474 #ifndef HAVE_CFS_SIZE_ROUND
475 static inline int cfs_size_round (int val)
477 return (val + 7) & (~0x7);
479 #define HAVE_CFS_SIZE_ROUND
482 static inline int cfs_size_round16(int val)
484 return (val + 0xf) & (~0xf);
487 static inline int cfs_size_round32(int val)
489 return (val + 0x1f) & (~0x1f);
492 static inline int cfs_size_round0(int val)
496 return (val + 1 + 7) & (~0x7);
499 static inline size_t cfs_round_strlen(char *fset)
501 return (size_t)cfs_size_round((int)strlen(fset) + 1);
504 #define LOGL(var,len,ptr) \
507 memcpy((char *)ptr, (const char *)var, len); \
508 ptr += cfs_size_round(len); \
511 #define LOGU(var,len,ptr) \
514 memcpy((char *)var, (const char *)ptr, len); \
515 ptr += cfs_size_round(len); \
518 #define LOGL0(var,len,ptr) \
522 memcpy((char *)ptr, (const char *)var, len); \
523 *((char *)(ptr) + len) = 0; \
524 ptr += cfs_size_round(len + 1); \
528 * Lustre Network Driver types.
531 /* Only add to these values (i.e. don't ever change or redefine them):
532 * network addresses depend on them... */
535 GMLND = 3, /* obsolete, keep it so that libcfs_nid2str works */