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8#include <linux/bio.h>
9#include <linux/blkdev.h>
10#include <linux/ctype.h>
11#include <linux/debugfs.h>
12#include <linux/module.h>
13#include <linux/seq_file.h>
14#include <linux/types.h>
15
16#include "util.h"
17
18#define simple_strtoint(c, end, base) simple_strtol(c, end, base)
19#define simple_strtouint(c, end, base) simple_strtoul(c, end, base)
20
21#define STRTO_H(name, type) \
22int bch_ ## name ## _h(const char *cp, type *res) \
23{ \
24 int u = 0; \
25 char *e; \
26 type i = simple_ ## name(cp, &e, 10); \
27 \
28 switch (tolower(*e)) { \
29 default: \
30 return -EINVAL; \
31 case 'y': \
32 case 'z': \
33 u++; \
34 case 'e': \
35 u++; \
36 case 'p': \
37 u++; \
38 case 't': \
39 u++; \
40 case 'g': \
41 u++; \
42 case 'm': \
43 u++; \
44 case 'k': \
45 u++; \
46 if (e++ == cp) \
47 return -EINVAL; \
48 case '\n': \
49 case '\0': \
50 if (*e == '\n') \
51 e++; \
52 } \
53 \
54 if (*e) \
55 return -EINVAL; \
56 \
57 while (u--) { \
58 if ((type) ~0 > 0 && \
59 (type) ~0 / 1024 <= i) \
60 return -EINVAL; \
61 if ((i > 0 && ANYSINT_MAX(type) / 1024 < i) || \
62 (i < 0 && -ANYSINT_MAX(type) / 1024 > i)) \
63 return -EINVAL; \
64 i *= 1024; \
65 } \
66 \
67 *res = i; \
68 return 0; \
69} \
70
71STRTO_H(strtoint, int)
72STRTO_H(strtouint, unsigned int)
73STRTO_H(strtoll, long long)
74STRTO_H(strtoull, unsigned long long)
75
76ssize_t bch_hprint(char *buf, int64_t v)
77{
78 static const char units[] = "?kMGTPEZY";
79 char dec[4] = "";
80 int u, t = 0;
81
82 for (u = 0; v >= 1024 || v <= -1024; u++) {
83 t = v & ~(~0 << 10);
84 v >>= 10;
85 }
86
87 if (!u)
88 return sprintf(buf, "%llu", v);
89
90 if (v < 100 && v > -100)
91 snprintf(dec, sizeof(dec), ".%i", t / 100);
92
93 return sprintf(buf, "%lli%s%c", v, dec, units[u]);
94}
95
96ssize_t bch_snprint_string_list(char *buf, size_t size, const char * const list[],
97 size_t selected)
98{
99 char *out = buf;
100 size_t i;
101
102 for (i = 0; list[i]; i++)
103 out += snprintf(out, buf + size - out,
104 i == selected ? "[%s] " : "%s ", list[i]);
105
106 out[-1] = '\n';
107 return out - buf;
108}
109
110ssize_t bch_read_string_list(const char *buf, const char * const list[])
111{
112 size_t i;
113 char *s, *d = kstrndup(buf, PAGE_SIZE - 1, GFP_KERNEL);
114 if (!d)
115 return -ENOMEM;
116
117 s = strim(d);
118
119 for (i = 0; list[i]; i++)
120 if (!strcmp(list[i], s))
121 break;
122
123 kfree(d);
124
125 if (!list[i])
126 return -EINVAL;
127
128 return i;
129}
130
131bool bch_is_zero(const char *p, size_t n)
132{
133 size_t i;
134
135 for (i = 0; i < n; i++)
136 if (p[i])
137 return false;
138 return true;
139}
140
141int bch_parse_uuid(const char *s, char *uuid)
142{
143 size_t i, j, x;
144 memset(uuid, 0, 16);
145
146 for (i = 0, j = 0;
147 i < strspn(s, "-0123456789:ABCDEFabcdef") && j < 32;
148 i++) {
149 x = s[i] | 32;
150
151 switch (x) {
152 case '0'...'9':
153 x -= '0';
154 break;
155 case 'a'...'f':
156 x -= 'a' - 10;
157 break;
158 default:
159 continue;
160 }
161
162 if (!(j & 1))
163 x <<= 4;
164 uuid[j++ >> 1] |= x;
165 }
166 return i;
167}
168
169void bch_time_stats_update(struct time_stats *stats, uint64_t start_time)
170{
171 uint64_t now = local_clock();
172 uint64_t duration = time_after64(now, start_time)
173 ? now - start_time : 0;
174 uint64_t last = time_after64(now, stats->last)
175 ? now - stats->last : 0;
176
177 stats->max_duration = max(stats->max_duration, duration);
178
179 if (stats->last) {
180 ewma_add(stats->average_duration, duration, 8, 8);
181
182 if (stats->average_frequency)
183 ewma_add(stats->average_frequency, last, 8, 8);
184 else
185 stats->average_frequency = last << 8;
186 } else {
187 stats->average_duration = duration << 8;
188 }
189
190 stats->last = now ?: 1;
191}
192
193unsigned bch_next_delay(struct ratelimit *d, uint64_t done)
194{
195 uint64_t now = local_clock();
196
197 d->next += div_u64(done, d->rate);
198
199 return time_after64(d->next, now)
200 ? div_u64(d->next - now, NSEC_PER_SEC / HZ)
201 : 0;
202}
203
204void bch_bio_map(struct bio *bio, void *base)
205{
206 size_t size = bio->bi_size;
207 struct bio_vec *bv = bio->bi_io_vec;
208
209 BUG_ON(!bio->bi_size);
210 BUG_ON(bio->bi_vcnt);
211
212 bv->bv_offset = base ? ((unsigned long) base) % PAGE_SIZE : 0;
213 goto start;
214
215 for (; size; bio->bi_vcnt++, bv++) {
216 bv->bv_offset = 0;
217start: bv->bv_len = min_t(size_t, PAGE_SIZE - bv->bv_offset,
218 size);
219 if (base) {
220 bv->bv_page = is_vmalloc_addr(base)
221 ? vmalloc_to_page(base)
222 : virt_to_page(base);
223
224 base += bv->bv_len;
225 }
226
227 size -= bv->bv_len;
228 }
229}
230
231int bch_bio_alloc_pages(struct bio *bio, gfp_t gfp)
232{
233 int i;
234 struct bio_vec *bv;
235
236 bio_for_each_segment(bv, bio, i) {
237 bv->bv_page = alloc_page(gfp);
238 if (!bv->bv_page) {
239 while (bv-- != bio->bi_io_vec + bio->bi_idx)
240 __free_page(bv->bv_page);
241 return -ENOMEM;
242 }
243 }
244
245 return 0;
246}
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269static const uint64_t crc_table[256] = {
270 0x0000000000000000ULL, 0x42F0E1EBA9EA3693ULL, 0x85E1C3D753D46D26ULL,
271 0xC711223CFA3E5BB5ULL, 0x493366450E42ECDFULL, 0x0BC387AEA7A8DA4CULL,
272 0xCCD2A5925D9681F9ULL, 0x8E224479F47CB76AULL, 0x9266CC8A1C85D9BEULL,
273 0xD0962D61B56FEF2DULL, 0x17870F5D4F51B498ULL, 0x5577EEB6E6BB820BULL,
274 0xDB55AACF12C73561ULL, 0x99A54B24BB2D03F2ULL, 0x5EB4691841135847ULL,
275 0x1C4488F3E8F96ED4ULL, 0x663D78FF90E185EFULL, 0x24CD9914390BB37CULL,
276 0xE3DCBB28C335E8C9ULL, 0xA12C5AC36ADFDE5AULL, 0x2F0E1EBA9EA36930ULL,
277 0x6DFEFF5137495FA3ULL, 0xAAEFDD6DCD770416ULL, 0xE81F3C86649D3285ULL,
278 0xF45BB4758C645C51ULL, 0xB6AB559E258E6AC2ULL, 0x71BA77A2DFB03177ULL,
279 0x334A9649765A07E4ULL, 0xBD68D2308226B08EULL, 0xFF9833DB2BCC861DULL,
280 0x388911E7D1F2DDA8ULL, 0x7A79F00C7818EB3BULL, 0xCC7AF1FF21C30BDEULL,
281 0x8E8A101488293D4DULL, 0x499B3228721766F8ULL, 0x0B6BD3C3DBFD506BULL,
282 0x854997BA2F81E701ULL, 0xC7B97651866BD192ULL, 0x00A8546D7C558A27ULL,
283 0x4258B586D5BFBCB4ULL, 0x5E1C3D753D46D260ULL, 0x1CECDC9E94ACE4F3ULL,
284 0xDBFDFEA26E92BF46ULL, 0x990D1F49C77889D5ULL, 0x172F5B3033043EBFULL,
285 0x55DFBADB9AEE082CULL, 0x92CE98E760D05399ULL, 0xD03E790CC93A650AULL,
286 0xAA478900B1228E31ULL, 0xE8B768EB18C8B8A2ULL, 0x2FA64AD7E2F6E317ULL,
287 0x6D56AB3C4B1CD584ULL, 0xE374EF45BF6062EEULL, 0xA1840EAE168A547DULL,
288 0x66952C92ECB40FC8ULL, 0x2465CD79455E395BULL, 0x3821458AADA7578FULL,
289 0x7AD1A461044D611CULL, 0xBDC0865DFE733AA9ULL, 0xFF3067B657990C3AULL,
290 0x711223CFA3E5BB50ULL, 0x33E2C2240A0F8DC3ULL, 0xF4F3E018F031D676ULL,
291 0xB60301F359DBE0E5ULL, 0xDA050215EA6C212FULL, 0x98F5E3FE438617BCULL,
292 0x5FE4C1C2B9B84C09ULL, 0x1D14202910527A9AULL, 0x93366450E42ECDF0ULL,
293 0xD1C685BB4DC4FB63ULL, 0x16D7A787B7FAA0D6ULL, 0x5427466C1E109645ULL,
294 0x4863CE9FF6E9F891ULL, 0x0A932F745F03CE02ULL, 0xCD820D48A53D95B7ULL,
295 0x8F72ECA30CD7A324ULL, 0x0150A8DAF8AB144EULL, 0x43A04931514122DDULL,
296 0x84B16B0DAB7F7968ULL, 0xC6418AE602954FFBULL, 0xBC387AEA7A8DA4C0ULL,
297 0xFEC89B01D3679253ULL, 0x39D9B93D2959C9E6ULL, 0x7B2958D680B3FF75ULL,
298 0xF50B1CAF74CF481FULL, 0xB7FBFD44DD257E8CULL, 0x70EADF78271B2539ULL,
299 0x321A3E938EF113AAULL, 0x2E5EB66066087D7EULL, 0x6CAE578BCFE24BEDULL,
300 0xABBF75B735DC1058ULL, 0xE94F945C9C3626CBULL, 0x676DD025684A91A1ULL,
301 0x259D31CEC1A0A732ULL, 0xE28C13F23B9EFC87ULL, 0xA07CF2199274CA14ULL,
302 0x167FF3EACBAF2AF1ULL, 0x548F120162451C62ULL, 0x939E303D987B47D7ULL,
303 0xD16ED1D631917144ULL, 0x5F4C95AFC5EDC62EULL, 0x1DBC74446C07F0BDULL,
304 0xDAAD56789639AB08ULL, 0x985DB7933FD39D9BULL, 0x84193F60D72AF34FULL,
305 0xC6E9DE8B7EC0C5DCULL, 0x01F8FCB784FE9E69ULL, 0x43081D5C2D14A8FAULL,
306 0xCD2A5925D9681F90ULL, 0x8FDAB8CE70822903ULL, 0x48CB9AF28ABC72B6ULL,
307 0x0A3B7B1923564425ULL, 0x70428B155B4EAF1EULL, 0x32B26AFEF2A4998DULL,
308 0xF5A348C2089AC238ULL, 0xB753A929A170F4ABULL, 0x3971ED50550C43C1ULL,
309 0x7B810CBBFCE67552ULL, 0xBC902E8706D82EE7ULL, 0xFE60CF6CAF321874ULL,
310 0xE224479F47CB76A0ULL, 0xA0D4A674EE214033ULL, 0x67C58448141F1B86ULL,
311 0x253565A3BDF52D15ULL, 0xAB1721DA49899A7FULL, 0xE9E7C031E063ACECULL,
312 0x2EF6E20D1A5DF759ULL, 0x6C0603E6B3B7C1CAULL, 0xF6FAE5C07D3274CDULL,
313 0xB40A042BD4D8425EULL, 0x731B26172EE619EBULL, 0x31EBC7FC870C2F78ULL,
314 0xBFC9838573709812ULL, 0xFD39626EDA9AAE81ULL, 0x3A28405220A4F534ULL,
315 0x78D8A1B9894EC3A7ULL, 0x649C294A61B7AD73ULL, 0x266CC8A1C85D9BE0ULL,
316 0xE17DEA9D3263C055ULL, 0xA38D0B769B89F6C6ULL, 0x2DAF4F0F6FF541ACULL,
317 0x6F5FAEE4C61F773FULL, 0xA84E8CD83C212C8AULL, 0xEABE6D3395CB1A19ULL,
318 0x90C79D3FEDD3F122ULL, 0xD2377CD44439C7B1ULL, 0x15265EE8BE079C04ULL,
319 0x57D6BF0317EDAA97ULL, 0xD9F4FB7AE3911DFDULL, 0x9B041A914A7B2B6EULL,
320 0x5C1538ADB04570DBULL, 0x1EE5D94619AF4648ULL, 0x02A151B5F156289CULL,
321 0x4051B05E58BC1E0FULL, 0x87409262A28245BAULL, 0xC5B073890B687329ULL,
322 0x4B9237F0FF14C443ULL, 0x0962D61B56FEF2D0ULL, 0xCE73F427ACC0A965ULL,
323 0x8C8315CC052A9FF6ULL, 0x3A80143F5CF17F13ULL, 0x7870F5D4F51B4980ULL,
324 0xBF61D7E80F251235ULL, 0xFD913603A6CF24A6ULL, 0x73B3727A52B393CCULL,
325 0x31439391FB59A55FULL, 0xF652B1AD0167FEEAULL, 0xB4A25046A88DC879ULL,
326 0xA8E6D8B54074A6ADULL, 0xEA16395EE99E903EULL, 0x2D071B6213A0CB8BULL,
327 0x6FF7FA89BA4AFD18ULL, 0xE1D5BEF04E364A72ULL, 0xA3255F1BE7DC7CE1ULL,
328 0x64347D271DE22754ULL, 0x26C49CCCB40811C7ULL, 0x5CBD6CC0CC10FAFCULL,
329 0x1E4D8D2B65FACC6FULL, 0xD95CAF179FC497DAULL, 0x9BAC4EFC362EA149ULL,
330 0x158E0A85C2521623ULL, 0x577EEB6E6BB820B0ULL, 0x906FC95291867B05ULL,
331 0xD29F28B9386C4D96ULL, 0xCEDBA04AD0952342ULL, 0x8C2B41A1797F15D1ULL,
332 0x4B3A639D83414E64ULL, 0x09CA82762AAB78F7ULL, 0x87E8C60FDED7CF9DULL,
333 0xC51827E4773DF90EULL, 0x020905D88D03A2BBULL, 0x40F9E43324E99428ULL,
334 0x2CFFE7D5975E55E2ULL, 0x6E0F063E3EB46371ULL, 0xA91E2402C48A38C4ULL,
335 0xEBEEC5E96D600E57ULL, 0x65CC8190991CB93DULL, 0x273C607B30F68FAEULL,
336 0xE02D4247CAC8D41BULL, 0xA2DDA3AC6322E288ULL, 0xBE992B5F8BDB8C5CULL,
337 0xFC69CAB42231BACFULL, 0x3B78E888D80FE17AULL, 0x7988096371E5D7E9ULL,
338 0xF7AA4D1A85996083ULL, 0xB55AACF12C735610ULL, 0x724B8ECDD64D0DA5ULL,
339 0x30BB6F267FA73B36ULL, 0x4AC29F2A07BFD00DULL, 0x08327EC1AE55E69EULL,
340 0xCF235CFD546BBD2BULL, 0x8DD3BD16FD818BB8ULL, 0x03F1F96F09FD3CD2ULL,
341 0x41011884A0170A41ULL, 0x86103AB85A2951F4ULL, 0xC4E0DB53F3C36767ULL,
342 0xD8A453A01B3A09B3ULL, 0x9A54B24BB2D03F20ULL, 0x5D45907748EE6495ULL,
343 0x1FB5719CE1045206ULL, 0x919735E51578E56CULL, 0xD367D40EBC92D3FFULL,
344 0x1476F63246AC884AULL, 0x568617D9EF46BED9ULL, 0xE085162AB69D5E3CULL,
345 0xA275F7C11F7768AFULL, 0x6564D5FDE549331AULL, 0x279434164CA30589ULL,
346 0xA9B6706FB8DFB2E3ULL, 0xEB46918411358470ULL, 0x2C57B3B8EB0BDFC5ULL,
347 0x6EA7525342E1E956ULL, 0x72E3DAA0AA188782ULL, 0x30133B4B03F2B111ULL,
348 0xF7021977F9CCEAA4ULL, 0xB5F2F89C5026DC37ULL, 0x3BD0BCE5A45A6B5DULL,
349 0x79205D0E0DB05DCEULL, 0xBE317F32F78E067BULL, 0xFCC19ED95E6430E8ULL,
350 0x86B86ED5267CDBD3ULL, 0xC4488F3E8F96ED40ULL, 0x0359AD0275A8B6F5ULL,
351 0x41A94CE9DC428066ULL, 0xCF8B0890283E370CULL, 0x8D7BE97B81D4019FULL,
352 0x4A6ACB477BEA5A2AULL, 0x089A2AACD2006CB9ULL, 0x14DEA25F3AF9026DULL,
353 0x562E43B4931334FEULL, 0x913F6188692D6F4BULL, 0xD3CF8063C0C759D8ULL,
354 0x5DEDC41A34BBEEB2ULL, 0x1F1D25F19D51D821ULL, 0xD80C07CD676F8394ULL,
355 0x9AFCE626CE85B507ULL,
356};
357
358uint64_t bch_crc64_update(uint64_t crc, const void *_data, size_t len)
359{
360 const unsigned char *data = _data;
361
362 while (len--) {
363 int i = ((int) (crc >> 56) ^ *data++) & 0xFF;
364 crc = crc_table[i] ^ (crc << 8);
365 }
366
367 return crc;
368}
369
370uint64_t bch_crc64(const void *data, size_t len)
371{
372 uint64_t crc = 0xffffffffffffffffULL;
373
374 crc = bch_crc64_update(crc, data, len);
375
376 return crc ^ 0xffffffffffffffffULL;
377}
378
