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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2014, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * libcfs/include/libcfs/libcfs_private.h
34 * Various defines for libcfs.
38 #ifndef __LIBCFS_PRIVATE_H__
39 #define __LIBCFS_PRIVATE_H__
41 #ifndef DEBUG_SUBSYSTEM
42 # define DEBUG_SUBSYSTEM S_UNDEFINED
45 #include <linux/slab.h>
46 #include <linux/vmalloc.h>
51 * When this is on, LASSERT macro includes check for assignment used instead
52 * of equality check, but doesn't have unlikely(). Turn this on from time to
53 * time to make test-builds. This shouldn't be on for production release.
55 #define LASSERT_CHECKED (0)
61 * Strange construction with empty "then" clause is used to trigger compiler
62 * warnings on the assertions of the form LASSERT(a = b);
64 * "warning: suggest parentheses around assignment used as truth value"
66 * requires -Wall. Unfortunately this rules out use of likely/unlikely.
68 #define LASSERTF(cond, fmt, ...) \
73 LIBCFS_DEBUG_MSG_DATA_DECL(__msg_data, D_EMERG, NULL); \
74 libcfs_debug_msg(&__msg_data, \
75 "ASSERTION( %s ) failed: " fmt, #cond, \
77 lbug_with_loc(&__msg_data); \
81 #define LASSERT(cond) LASSERTF(cond, "\n")
83 #else /* !LASSERT_CHECKED */
85 #define LASSERTF(cond, fmt, ...) \
87 if (unlikely(!(cond))) { \
88 LIBCFS_DEBUG_MSG_DATA_DECL(__msg_data, D_EMERG, NULL); \
89 libcfs_debug_msg(&__msg_data, \
90 "ASSERTION( %s ) failed: " fmt, #cond, \
92 lbug_with_loc(&__msg_data); \
96 #define LASSERT(cond) LASSERTF(cond, "\n")
97 #endif /* !LASSERT_CHECKED */
98 #else /* !LIBCFS_DEBUG */
99 /* sizeof is to use expression without evaluating it. */
100 # define LASSERT(e) ((void)sizeof!!(e))
101 # define LASSERTF(cond, ...) ((void)sizeof!!(cond))
102 #endif /* !LIBCFS_DEBUG */
104 #ifdef CONFIG_LUSTRE_DEBUG_EXPENSIVE_CHECK
106 * This is for more expensive checks that one doesn't want to be enabled all
107 * the time. LINVRNT() has to be explicitly enabled by --enable-invariants
110 # define LINVRNT(exp) LASSERT(exp)
112 # define LINVRNT(exp) ((void)sizeof!!(exp))
115 void __noreturn lbug_with_loc(struct libcfs_debug_msg_data *msg);
119 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_EMERG, NULL); \
120 lbug_with_loc(&msgdata); \
128 extern atomic64_t libcfs_kmem;
130 # define libcfs_kmem_inc(ptr, size) \
132 atomic64_add(size, &libcfs_kmem); \
135 # define libcfs_kmem_dec(ptr, size) \
137 atomic64_sub(size, &libcfs_kmem); \
140 # define libcfs_kmem_read() \
141 (long long)atomic64_read(&libcfs_kmem)
144 # define libcfs_kmem_inc(ptr, size) do {} while (0)
145 # define libcfs_kmem_dec(ptr, size) do {} while (0)
146 # define libcfs_kmem_read() (0)
147 #endif /* LIBCFS_DEBUG */
149 #ifndef LIBCFS_VMALLOC_SIZE
150 #define LIBCFS_VMALLOC_SIZE (2 << PAGE_SHIFT) /* 2 pages */
153 #define LIBCFS_ALLOC_PRE(size, mask) \
155 LASSERT(!in_interrupt() || \
156 ((size) <= LIBCFS_VMALLOC_SIZE && \
157 ((mask) & GFP_ATOMIC)) != 0); \
160 #define LIBCFS_ALLOC_POST(ptr, size) \
162 if (unlikely((ptr) == NULL)) { \
163 CERROR("LNET: out of memory at %s:%d (tried to alloc '" \
164 #ptr "' = %d)\n", __FILE__, __LINE__, (int)(size)); \
165 CERROR("LNET: %lld total bytes allocated by lnet\n", \
166 libcfs_kmem_read()); \
168 libcfs_kmem_inc((ptr), (size)); \
169 CDEBUG(D_MALLOC, "alloc '" #ptr "': %d at %p (tot %lld).\n", \
170 (int)(size), (ptr), libcfs_kmem_read()); \
175 * allocate memory with GFP flags @mask
176 * The allocated memory is zeroed-out.
178 #define LIBCFS_ALLOC_GFP(ptr, size, mask) \
180 LIBCFS_ALLOC_PRE((size), (mask)); \
181 (ptr) = (size) <= LIBCFS_VMALLOC_SIZE ? \
182 kzalloc((size), (mask)) : vzalloc(size); \
183 LIBCFS_ALLOC_POST((ptr), (size)); \
189 #define LIBCFS_ALLOC(ptr, size) \
190 LIBCFS_ALLOC_GFP(ptr, size, GFP_NOFS)
193 * non-sleeping allocator
195 #define LIBCFS_ALLOC_ATOMIC(ptr, size) \
196 LIBCFS_ALLOC_GFP(ptr, size, GFP_ATOMIC)
199 * allocate memory for specified CPU partition
200 * \a cptab != NULL, \a cpt is CPU partition id of \a cptab
201 * \a cptab == NULL, \a cpt is HW NUMA node id
202 * The allocated memory is zeroed-out.
204 #define LIBCFS_CPT_ALLOC_GFP(ptr, cptab, cpt, size, mask) \
206 LIBCFS_ALLOC_PRE((size), (mask)); \
207 (ptr) = (size) <= LIBCFS_VMALLOC_SIZE ? \
208 cfs_cpt_malloc((cptab), (cpt), (size), (mask) | __GFP_ZERO) : \
209 cfs_cpt_vzalloc((cptab), (cpt), (size)); \
210 LIBCFS_ALLOC_POST((ptr), (size)); \
213 /** default numa allocator */
214 #define LIBCFS_CPT_ALLOC(ptr, cptab, cpt, size) \
215 LIBCFS_CPT_ALLOC_GFP(ptr, cptab, cpt, size, GFP_NOFS)
217 void init_libcfs_vfree_atomic(void);
218 void exit_libcfs_vfree_atomic(void);
220 #define LIBCFS_FREE(ptr, size) \
223 if (unlikely((ptr) == NULL)) { \
224 CERROR("LIBCFS: free NULL '" #ptr "' (%d bytes) at " \
225 "%s:%d\n", s, __FILE__, __LINE__); \
228 libcfs_kmem_dec((ptr), s); \
229 CDEBUG(D_MALLOC, "kfreed '" #ptr "': %d at %p (tot %lld).\n", \
230 s, (ptr), libcfs_kmem_read()); \
231 if (unlikely(s > LIBCFS_VMALLOC_SIZE)) \
232 libcfs_vfree_atomic(ptr); \
237 /******************************************************************************/
239 void libcfs_debug_dumplog(void);
240 int libcfs_debug_init(unsigned long bufsize);
241 int libcfs_debug_cleanup(void);
242 int libcfs_debug_clear_buffer(void);
243 int libcfs_debug_mark_buffer(const char *text);
246 * allocate a variable array, returned value is an array of pointers.
247 * Caller can specify length of array by count.
249 void *cfs_array_alloc(int count, unsigned int size);
250 void cfs_array_free(void *vars);
252 #define LASSERT_ATOMIC_ENABLED (1)
254 #if LASSERT_ATOMIC_ENABLED
256 /** assert value of @a is equal to @v */
257 #define LASSERT_ATOMIC_EQ(a, v) \
258 LASSERTF(atomic_read(a) == v, "value: %d\n", atomic_read((a)));
260 /** assert value of @a is unequal to @v */
261 #define LASSERT_ATOMIC_NE(a, v) \
262 LASSERTF(atomic_read(a) != v, "value: %d\n", atomic_read((a)));
264 /** assert value of @a is little than @v */
265 #define LASSERT_ATOMIC_LT(a, v) \
266 LASSERTF(atomic_read(a) < v, "value: %d\n", atomic_read((a)));
268 /** assert value of @a is little/equal to @v */
269 #define LASSERT_ATOMIC_LE(a, v) \
270 LASSERTF(atomic_read(a) <= v, "value: %d\n", atomic_read((a)));
272 /** assert value of @a is great than @v */
273 #define LASSERT_ATOMIC_GT(a, v) \
274 LASSERTF(atomic_read(a) > v, "value: %d\n", atomic_read((a)));
276 /** assert value of @a is great/equal to @v */
277 #define LASSERT_ATOMIC_GE(a, v) \
278 LASSERTF(atomic_read(a) >= v, "value: %d\n", atomic_read((a)));
280 /** assert value of @a is great than @v1 and little than @v2 */
281 #define LASSERT_ATOMIC_GT_LT(a, v1, v2) \
283 int __v = atomic_read(a); \
284 LASSERTF(__v > v1 && __v < v2, "value: %d\n", __v);\
287 /** assert value of @a is great than @v1 and little/equal to @v2 */
288 #define LASSERT_ATOMIC_GT_LE(a, v1, v2) \
290 int __v = atomic_read(a); \
291 LASSERTF(__v > v1 && __v <= v2, "value: %d\n", __v);\
294 /** assert value of @a is great/equal to @v1 and little than @v2 */
295 #define LASSERT_ATOMIC_GE_LT(a, v1, v2) \
297 int __v = atomic_read(a); \
298 LASSERTF(__v >= v1 && __v < v2, "value: %d\n", __v);\
301 /** assert value of @a is great/equal to @v1 and little/equal to @v2 */
302 #define LASSERT_ATOMIC_GE_LE(a, v1, v2) \
304 int __v = atomic_read(a); \
305 LASSERTF(__v >= v1 && __v <= v2, "value: %d\n", __v); \
308 #else /* !LASSERT_ATOMIC_ENABLED */
310 #define LASSERT_ATOMIC_EQ(a, v) do {} while (0)
311 #define LASSERT_ATOMIC_NE(a, v) do {} while (0)
312 #define LASSERT_ATOMIC_LT(a, v) do {} while (0)
313 #define LASSERT_ATOMIC_LE(a, v) do {} while (0)
314 #define LASSERT_ATOMIC_GT(a, v) do {} while (0)
315 #define LASSERT_ATOMIC_GE(a, v) do {} while (0)
316 #define LASSERT_ATOMIC_GT_LT(a, v1, v2) do {} while (0)
317 #define LASSERT_ATOMIC_GT_LE(a, v1, v2) do {} while (0)
318 #define LASSERT_ATOMIC_GE_LT(a, v1, v2) do {} while (0)
319 #define LASSERT_ATOMIC_GE_LE(a, v1, v2) do {} while (0)
321 #endif /* LASSERT_ATOMIC_ENABLED */
323 #define LASSERT_ATOMIC_ZERO(a) LASSERT_ATOMIC_EQ(a, 0)
324 #define LASSERT_ATOMIC_POS(a) LASSERT_ATOMIC_GT(a, 0)
326 #define CFS_ALLOC_PTR(ptr) LIBCFS_ALLOC(ptr, sizeof(*(ptr)));
327 #define CFS_ALLOC_PTR_ARRAY(ptr, count) \
328 LIBCFS_ALLOC(ptr, (count) * sizeof(*(ptr)))
330 #define CFS_FREE_PTR(ptr) LIBCFS_FREE(ptr, sizeof(*(ptr)));
331 #define CFS_FREE_PTR_ARRAY(ptr, count) \
332 LIBCFS_FREE(ptr, (count) * sizeof(*(ptr)))
335 #define ergo(a, b) (!(a) || (b))
336 /* logical equivalence */
337 #define equi(a, b) (!!(a) == !!(b))
339 #define MKSTR(ptr) ((ptr))? (ptr) : ""
341 static inline size_t cfs_size_round4(size_t val)
343 return (val + 3) & (~0x3);
346 #ifndef HAVE_CFS_SIZE_ROUND
347 static inline size_t cfs_size_round(size_t val)
349 return (val + 7) & (~0x7);
351 #define HAVE_CFS_SIZE_ROUND
354 static inline size_t cfs_size_round16(size_t val)
356 return (val + 0xf) & (~0xf);
359 static inline size_t cfs_size_round32(size_t val)
361 return (val + 0x1f) & (~0x1f);
364 static inline size_t cfs_size_round0(size_t val)
368 return (val + 1 + 7) & (~0x7);
371 static inline size_t cfs_round_strlen(char *fset)
373 return cfs_size_round(strlen(fset) + 1);