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1 | 18607dcb | bellard | /*
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2 | 18607dcb | bellard | * Simple C functions to supplement the C library
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3 | 5fafdf24 | ths | *
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4 | 18607dcb | bellard | * Copyright (c) 2006 Fabrice Bellard
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5 | 18607dcb | bellard | *
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6 | 18607dcb | bellard | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 18607dcb | bellard | * of this software and associated documentation files (the "Software"), to deal
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8 | 18607dcb | bellard | * in the Software without restriction, including without limitation the rights
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9 | 18607dcb | bellard | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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10 | 18607dcb | bellard | * copies of the Software, and to permit persons to whom the Software is
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11 | 18607dcb | bellard | * furnished to do so, subject to the following conditions:
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12 | 18607dcb | bellard | *
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13 | 18607dcb | bellard | * The above copyright notice and this permission notice shall be included in
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14 | 18607dcb | bellard | * all copies or substantial portions of the Software.
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15 | 18607dcb | bellard | *
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16 | 18607dcb | bellard | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 | 18607dcb | bellard | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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18 | 18607dcb | bellard | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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19 | 18607dcb | bellard | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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20 | 18607dcb | bellard | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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21 | 18607dcb | bellard | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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22 | 18607dcb | bellard | * THE SOFTWARE.
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23 | 18607dcb | bellard | */
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24 | faf07963 | pbrook | #include "qemu-common.h" |
25 | 8d371d4b | aliguori | #include "host-utils.h" |
26 | 9f9b17a4 | Jes Sorensen | #include <math.h> |
27 | 18607dcb | bellard | |
28 | 8c5135f9 | Paolo Bonzini | #include "qemu_socket.h" |
29 | 3d9b4925 | Michael Tokarev | #include "iov.h" |
30 | 8c5135f9 | Paolo Bonzini | |
31 | 18607dcb | bellard | void pstrcpy(char *buf, int buf_size, const char *str) |
32 | 18607dcb | bellard | { |
33 | 18607dcb | bellard | int c;
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34 | 18607dcb | bellard | char *q = buf;
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35 | 18607dcb | bellard | |
36 | 18607dcb | bellard | if (buf_size <= 0) |
37 | 18607dcb | bellard | return;
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38 | 18607dcb | bellard | |
39 | 18607dcb | bellard | for(;;) {
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40 | 18607dcb | bellard | c = *str++; |
41 | 18607dcb | bellard | if (c == 0 || q >= buf + buf_size - 1) |
42 | 18607dcb | bellard | break;
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43 | 18607dcb | bellard | *q++ = c; |
44 | 18607dcb | bellard | } |
45 | 18607dcb | bellard | *q = '\0';
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46 | 18607dcb | bellard | } |
47 | 18607dcb | bellard | |
48 | 18607dcb | bellard | /* strcat and truncate. */
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49 | 18607dcb | bellard | char *pstrcat(char *buf, int buf_size, const char *s) |
50 | 18607dcb | bellard | { |
51 | 18607dcb | bellard | int len;
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52 | 18607dcb | bellard | len = strlen(buf); |
53 | 5fafdf24 | ths | if (len < buf_size)
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54 | 18607dcb | bellard | pstrcpy(buf + len, buf_size - len, s); |
55 | 18607dcb | bellard | return buf;
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56 | 18607dcb | bellard | } |
57 | 18607dcb | bellard | |
58 | 18607dcb | bellard | int strstart(const char *str, const char *val, const char **ptr) |
59 | 18607dcb | bellard | { |
60 | 18607dcb | bellard | const char *p, *q; |
61 | 18607dcb | bellard | p = str; |
62 | 18607dcb | bellard | q = val; |
63 | 18607dcb | bellard | while (*q != '\0') { |
64 | 18607dcb | bellard | if (*p != *q)
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65 | 18607dcb | bellard | return 0; |
66 | 18607dcb | bellard | p++; |
67 | 18607dcb | bellard | q++; |
68 | 18607dcb | bellard | } |
69 | 18607dcb | bellard | if (ptr)
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70 | 18607dcb | bellard | *ptr = p; |
71 | 18607dcb | bellard | return 1; |
72 | 18607dcb | bellard | } |
73 | 18607dcb | bellard | |
74 | 18607dcb | bellard | int stristart(const char *str, const char *val, const char **ptr) |
75 | 18607dcb | bellard | { |
76 | 18607dcb | bellard | const char *p, *q; |
77 | 18607dcb | bellard | p = str; |
78 | 18607dcb | bellard | q = val; |
79 | 18607dcb | bellard | while (*q != '\0') { |
80 | cd390083 | blueswir1 | if (qemu_toupper(*p) != qemu_toupper(*q))
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81 | 18607dcb | bellard | return 0; |
82 | 18607dcb | bellard | p++; |
83 | 18607dcb | bellard | q++; |
84 | 18607dcb | bellard | } |
85 | 18607dcb | bellard | if (ptr)
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86 | 18607dcb | bellard | *ptr = p; |
87 | 18607dcb | bellard | return 1; |
88 | 18607dcb | bellard | } |
89 | 3c6b2088 | bellard | |
90 | d43277c5 | Blue Swirl | /* XXX: use host strnlen if available ? */
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91 | d43277c5 | Blue Swirl | int qemu_strnlen(const char *s, int max_len) |
92 | d43277c5 | Blue Swirl | { |
93 | d43277c5 | Blue Swirl | int i;
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94 | d43277c5 | Blue Swirl | |
95 | d43277c5 | Blue Swirl | for(i = 0; i < max_len; i++) { |
96 | d43277c5 | Blue Swirl | if (s[i] == '\0') { |
97 | d43277c5 | Blue Swirl | break;
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98 | d43277c5 | Blue Swirl | } |
99 | d43277c5 | Blue Swirl | } |
100 | d43277c5 | Blue Swirl | return i;
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101 | d43277c5 | Blue Swirl | } |
102 | d43277c5 | Blue Swirl | |
103 | 3c6b2088 | bellard | time_t mktimegm(struct tm *tm)
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104 | 3c6b2088 | bellard | { |
105 | 3c6b2088 | bellard | time_t t; |
106 | 3c6b2088 | bellard | int y = tm->tm_year + 1900, m = tm->tm_mon + 1, d = tm->tm_mday; |
107 | 3c6b2088 | bellard | if (m < 3) { |
108 | 3c6b2088 | bellard | m += 12;
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109 | 3c6b2088 | bellard | y--; |
110 | 3c6b2088 | bellard | } |
111 | 3c6b2088 | bellard | t = 86400 * (d + (153 * m - 457) / 5 + 365 * y + y / 4 - y / 100 + |
112 | 3c6b2088 | bellard | y / 400 - 719469); |
113 | 3c6b2088 | bellard | t += 3600 * tm->tm_hour + 60 * tm->tm_min + tm->tm_sec; |
114 | 3c6b2088 | bellard | return t;
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115 | 3c6b2088 | bellard | } |
116 | b39ade83 | aliguori | |
117 | ad46db9a | blueswir1 | int qemu_fls(int i) |
118 | b39ade83 | aliguori | { |
119 | 8d371d4b | aliguori | return 32 - clz32(i); |
120 | b39ade83 | aliguori | } |
121 | 44e3ee8a | aliguori | |
122 | 6f1953c4 | Christoph Hellwig | /*
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123 | 6f1953c4 | Christoph Hellwig | * Make sure data goes on disk, but if possible do not bother to
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124 | 6f1953c4 | Christoph Hellwig | * write out the inode just for timestamp updates.
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125 | 6f1953c4 | Christoph Hellwig | *
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126 | 6f1953c4 | Christoph Hellwig | * Unfortunately even in 2009 many operating systems do not support
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127 | 6f1953c4 | Christoph Hellwig | * fdatasync and have to fall back to fsync.
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128 | 6f1953c4 | Christoph Hellwig | */
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129 | 6f1953c4 | Christoph Hellwig | int qemu_fdatasync(int fd) |
130 | 6f1953c4 | Christoph Hellwig | { |
131 | 5f6b9e8f | Blue Swirl | #ifdef CONFIG_FDATASYNC
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132 | 6f1953c4 | Christoph Hellwig | return fdatasync(fd);
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133 | 6f1953c4 | Christoph Hellwig | #else
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134 | 6f1953c4 | Christoph Hellwig | return fsync(fd);
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135 | 6f1953c4 | Christoph Hellwig | #endif
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136 | 6f1953c4 | Christoph Hellwig | } |
137 | 6f1953c4 | Christoph Hellwig | |
138 | 44e3ee8a | aliguori | /* io vectors */
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139 | 44e3ee8a | aliguori | |
140 | 44e3ee8a | aliguori | void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint) |
141 | 44e3ee8a | aliguori | { |
142 | 7267c094 | Anthony Liguori | qiov->iov = g_malloc(alloc_hint * sizeof(struct iovec)); |
143 | 44e3ee8a | aliguori | qiov->niov = 0;
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144 | 44e3ee8a | aliguori | qiov->nalloc = alloc_hint; |
145 | 249aa745 | aliguori | qiov->size = 0;
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146 | 44e3ee8a | aliguori | } |
147 | 44e3ee8a | aliguori | |
148 | 522584a5 | aliguori | void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov) |
149 | 522584a5 | aliguori | { |
150 | 522584a5 | aliguori | int i;
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151 | 522584a5 | aliguori | |
152 | 522584a5 | aliguori | qiov->iov = iov; |
153 | 522584a5 | aliguori | qiov->niov = niov; |
154 | 522584a5 | aliguori | qiov->nalloc = -1;
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155 | 522584a5 | aliguori | qiov->size = 0;
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156 | 522584a5 | aliguori | for (i = 0; i < niov; i++) |
157 | 522584a5 | aliguori | qiov->size += iov[i].iov_len; |
158 | 522584a5 | aliguori | } |
159 | 522584a5 | aliguori | |
160 | 44e3ee8a | aliguori | void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len) |
161 | 44e3ee8a | aliguori | { |
162 | 522584a5 | aliguori | assert(qiov->nalloc != -1);
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163 | 522584a5 | aliguori | |
164 | 44e3ee8a | aliguori | if (qiov->niov == qiov->nalloc) {
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165 | 44e3ee8a | aliguori | qiov->nalloc = 2 * qiov->nalloc + 1; |
166 | 7267c094 | Anthony Liguori | qiov->iov = g_realloc(qiov->iov, qiov->nalloc * sizeof(struct iovec)); |
167 | 44e3ee8a | aliguori | } |
168 | 44e3ee8a | aliguori | qiov->iov[qiov->niov].iov_base = base; |
169 | 44e3ee8a | aliguori | qiov->iov[qiov->niov].iov_len = len; |
170 | 249aa745 | aliguori | qiov->size += len; |
171 | 44e3ee8a | aliguori | ++qiov->niov; |
172 | 44e3ee8a | aliguori | } |
173 | 44e3ee8a | aliguori | |
174 | 40b4f539 | Kevin Wolf | /*
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175 | 1b093c48 | Michael Tokarev | * Concatenates (partial) iovecs from src to the end of dst.
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176 | 1b093c48 | Michael Tokarev | * It starts copying after skipping `soffset' bytes at the
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177 | 1b093c48 | Michael Tokarev | * beginning of src and adds individual vectors from src to
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178 | 1b093c48 | Michael Tokarev | * dst copies up to `sbytes' bytes total, or up to the end
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179 | 1b093c48 | Michael Tokarev | * of src if it comes first. This way, it is okay to specify
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180 | 1b093c48 | Michael Tokarev | * very large value for `sbytes' to indicate "up to the end
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181 | 1b093c48 | Michael Tokarev | * of src".
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182 | 1b093c48 | Michael Tokarev | * Only vector pointers are processed, not the actual data buffers.
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183 | 40b4f539 | Kevin Wolf | */
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184 | 1b093c48 | Michael Tokarev | void qemu_iovec_concat(QEMUIOVector *dst,
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185 | 1b093c48 | Michael Tokarev | QEMUIOVector *src, size_t soffset, size_t sbytes) |
186 | 40b4f539 | Kevin Wolf | { |
187 | 40b4f539 | Kevin Wolf | int i;
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188 | 40b4f539 | Kevin Wolf | size_t done; |
189 | 1b093c48 | Michael Tokarev | struct iovec *siov = src->iov;
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190 | 40b4f539 | Kevin Wolf | assert(dst->nalloc != -1);
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191 | 1b093c48 | Michael Tokarev | assert(src->size >= soffset); |
192 | 1b093c48 | Michael Tokarev | for (i = 0, done = 0; done < sbytes && i < src->niov; i++) { |
193 | 1b093c48 | Michael Tokarev | if (soffset < siov[i].iov_len) {
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194 | 1b093c48 | Michael Tokarev | size_t len = MIN(siov[i].iov_len - soffset, sbytes - done); |
195 | 1b093c48 | Michael Tokarev | qemu_iovec_add(dst, siov[i].iov_base + soffset, len); |
196 | 1b093c48 | Michael Tokarev | done += len; |
197 | 1b093c48 | Michael Tokarev | soffset = 0;
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198 | b8a83a4f | Kevin Wolf | } else {
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199 | 1b093c48 | Michael Tokarev | soffset -= siov[i].iov_len; |
200 | b8a83a4f | Kevin Wolf | } |
201 | 40b4f539 | Kevin Wolf | } |
202 | 1b093c48 | Michael Tokarev | /* return done; */
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203 | b8a83a4f | Kevin Wolf | } |
204 | b8a83a4f | Kevin Wolf | |
205 | 44e3ee8a | aliguori | void qemu_iovec_destroy(QEMUIOVector *qiov)
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206 | 44e3ee8a | aliguori | { |
207 | 522584a5 | aliguori | assert(qiov->nalloc != -1);
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208 | 522584a5 | aliguori | |
209 | bd83b362 | Paolo Bonzini | qemu_iovec_reset(qiov); |
210 | 7267c094 | Anthony Liguori | g_free(qiov->iov); |
211 | bd83b362 | Paolo Bonzini | qiov->nalloc = 0;
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212 | bd83b362 | Paolo Bonzini | qiov->iov = NULL;
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213 | 44e3ee8a | aliguori | } |
214 | 44e3ee8a | aliguori | |
215 | be959463 | aliguori | void qemu_iovec_reset(QEMUIOVector *qiov)
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216 | be959463 | aliguori | { |
217 | 522584a5 | aliguori | assert(qiov->nalloc != -1);
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218 | 522584a5 | aliguori | |
219 | be959463 | aliguori | qiov->niov = 0;
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220 | be959463 | aliguori | qiov->size = 0;
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221 | be959463 | aliguori | } |
222 | be959463 | aliguori | |
223 | d5e6b161 | Michael Tokarev | size_t qemu_iovec_to_buf(QEMUIOVector *qiov, size_t offset, |
224 | d5e6b161 | Michael Tokarev | void *buf, size_t bytes)
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225 | 44e3ee8a | aliguori | { |
226 | d5e6b161 | Michael Tokarev | return iov_to_buf(qiov->iov, qiov->niov, offset, buf, bytes);
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227 | 44e3ee8a | aliguori | } |
228 | 44e3ee8a | aliguori | |
229 | 03396148 | Michael Tokarev | size_t qemu_iovec_from_buf(QEMUIOVector *qiov, size_t offset, |
230 | 03396148 | Michael Tokarev | const void *buf, size_t bytes) |
231 | 44e3ee8a | aliguori | { |
232 | 03396148 | Michael Tokarev | return iov_from_buf(qiov->iov, qiov->niov, offset, buf, bytes);
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233 | 44e3ee8a | aliguori | } |
234 | db1a4972 | Paolo Bonzini | |
235 | 3d9b4925 | Michael Tokarev | size_t qemu_iovec_memset(QEMUIOVector *qiov, size_t offset, |
236 | 3d9b4925 | Michael Tokarev | int fillc, size_t bytes)
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237 | b8a83a4f | Kevin Wolf | { |
238 | 3d9b4925 | Michael Tokarev | return iov_memset(qiov->iov, qiov->niov, offset, fillc, bytes);
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239 | e0d9c6f9 | Chunqiang Tang | } |
240 | e0d9c6f9 | Chunqiang Tang | |
241 | 1a6d39fd | Stefan Hajnoczi | /*
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242 | 1a6d39fd | Stefan Hajnoczi | * Checks if a buffer is all zeroes
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243 | 1a6d39fd | Stefan Hajnoczi | *
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244 | 1a6d39fd | Stefan Hajnoczi | * Attention! The len must be a multiple of 4 * sizeof(long) due to
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245 | 1a6d39fd | Stefan Hajnoczi | * restriction of optimizations in this function.
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246 | 1a6d39fd | Stefan Hajnoczi | */
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247 | 1a6d39fd | Stefan Hajnoczi | bool buffer_is_zero(const void *buf, size_t len) |
248 | 1a6d39fd | Stefan Hajnoczi | { |
249 | 1a6d39fd | Stefan Hajnoczi | /*
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250 | 1a6d39fd | Stefan Hajnoczi | * Use long as the biggest available internal data type that fits into the
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251 | 1a6d39fd | Stefan Hajnoczi | * CPU register and unroll the loop to smooth out the effect of memory
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252 | 1a6d39fd | Stefan Hajnoczi | * latency.
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253 | 1a6d39fd | Stefan Hajnoczi | */
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254 | 1a6d39fd | Stefan Hajnoczi | |
255 | 1a6d39fd | Stefan Hajnoczi | size_t i; |
256 | 1a6d39fd | Stefan Hajnoczi | long d0, d1, d2, d3;
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257 | 1a6d39fd | Stefan Hajnoczi | const long * const data = buf; |
258 | 1a6d39fd | Stefan Hajnoczi | |
259 | 1a6d39fd | Stefan Hajnoczi | assert(len % (4 * sizeof(long)) == 0); |
260 | 1a6d39fd | Stefan Hajnoczi | len /= sizeof(long); |
261 | 1a6d39fd | Stefan Hajnoczi | |
262 | 1a6d39fd | Stefan Hajnoczi | for (i = 0; i < len; i += 4) { |
263 | 1a6d39fd | Stefan Hajnoczi | d0 = data[i + 0];
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264 | 1a6d39fd | Stefan Hajnoczi | d1 = data[i + 1];
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265 | 1a6d39fd | Stefan Hajnoczi | d2 = data[i + 2];
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266 | 1a6d39fd | Stefan Hajnoczi | d3 = data[i + 3];
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267 | 1a6d39fd | Stefan Hajnoczi | |
268 | 1a6d39fd | Stefan Hajnoczi | if (d0 || d1 || d2 || d3) {
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269 | 1a6d39fd | Stefan Hajnoczi | return false; |
270 | 1a6d39fd | Stefan Hajnoczi | } |
271 | 1a6d39fd | Stefan Hajnoczi | } |
272 | 1a6d39fd | Stefan Hajnoczi | |
273 | 1a6d39fd | Stefan Hajnoczi | return true; |
274 | 1a6d39fd | Stefan Hajnoczi | } |
275 | 1a6d39fd | Stefan Hajnoczi | |
276 | db1a4972 | Paolo Bonzini | #ifndef _WIN32
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277 | db1a4972 | Paolo Bonzini | /* Sets a specific flag */
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278 | db1a4972 | Paolo Bonzini | int fcntl_setfl(int fd, int flag) |
279 | db1a4972 | Paolo Bonzini | { |
280 | db1a4972 | Paolo Bonzini | int flags;
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281 | db1a4972 | Paolo Bonzini | |
282 | db1a4972 | Paolo Bonzini | flags = fcntl(fd, F_GETFL); |
283 | db1a4972 | Paolo Bonzini | if (flags == -1) |
284 | db1a4972 | Paolo Bonzini | return -errno;
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285 | db1a4972 | Paolo Bonzini | |
286 | db1a4972 | Paolo Bonzini | if (fcntl(fd, F_SETFL, flags | flag) == -1) |
287 | db1a4972 | Paolo Bonzini | return -errno;
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288 | db1a4972 | Paolo Bonzini | |
289 | db1a4972 | Paolo Bonzini | return 0; |
290 | db1a4972 | Paolo Bonzini | } |
291 | db1a4972 | Paolo Bonzini | #endif
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292 | db1a4972 | Paolo Bonzini | |
293 | eba90e4e | Markus Armbruster | static int64_t suffix_mul(char suffix, int64_t unit) |
294 | eba90e4e | Markus Armbruster | { |
295 | eba90e4e | Markus Armbruster | switch (qemu_toupper(suffix)) {
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296 | eba90e4e | Markus Armbruster | case STRTOSZ_DEFSUFFIX_B:
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297 | eba90e4e | Markus Armbruster | return 1; |
298 | eba90e4e | Markus Armbruster | case STRTOSZ_DEFSUFFIX_KB:
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299 | eba90e4e | Markus Armbruster | return unit;
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300 | eba90e4e | Markus Armbruster | case STRTOSZ_DEFSUFFIX_MB:
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301 | eba90e4e | Markus Armbruster | return unit * unit;
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302 | eba90e4e | Markus Armbruster | case STRTOSZ_DEFSUFFIX_GB:
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303 | eba90e4e | Markus Armbruster | return unit * unit * unit;
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304 | eba90e4e | Markus Armbruster | case STRTOSZ_DEFSUFFIX_TB:
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305 | eba90e4e | Markus Armbruster | return unit * unit * unit * unit;
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306 | eba90e4e | Markus Armbruster | } |
307 | eba90e4e | Markus Armbruster | return -1; |
308 | eba90e4e | Markus Armbruster | } |
309 | eba90e4e | Markus Armbruster | |
310 | 9f9b17a4 | Jes Sorensen | /*
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311 | 9f9b17a4 | Jes Sorensen | * Convert string to bytes, allowing either B/b for bytes, K/k for KB,
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312 | 8dddfb55 | Markus Armbruster | * M/m for MB, G/g for GB or T/t for TB. End pointer will be returned
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313 | eba90e4e | Markus Armbruster | * in *end, if not NULL. Return -1 on error.
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314 | 9f9b17a4 | Jes Sorensen | */
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315 | a732e1ba | Joerg Roedel | int64_t strtosz_suffix_unit(const char *nptr, char **end, |
316 | a732e1ba | Joerg Roedel | const char default_suffix, int64_t unit) |
317 | 9f9b17a4 | Jes Sorensen | { |
318 | 70b4f4bb | Jes Sorensen | int64_t retval = -1;
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319 | f3bd362a | Jes Sorensen | char *endptr;
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320 | eba90e4e | Markus Armbruster | unsigned char c; |
321 | 9f9b17a4 | Jes Sorensen | int mul_required = 0; |
322 | 9f9b17a4 | Jes Sorensen | double val, mul, integral, fraction;
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323 | 9f9b17a4 | Jes Sorensen | |
324 | 9f9b17a4 | Jes Sorensen | errno = 0;
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325 | 9f9b17a4 | Jes Sorensen | val = strtod(nptr, &endptr); |
326 | 9f9b17a4 | Jes Sorensen | if (isnan(val) || endptr == nptr || errno != 0) { |
327 | 9f9b17a4 | Jes Sorensen | goto fail;
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328 | 9f9b17a4 | Jes Sorensen | } |
329 | 7eb05349 | Jes Sorensen | fraction = modf(val, &integral); |
330 | 7eb05349 | Jes Sorensen | if (fraction != 0) { |
331 | 9f9b17a4 | Jes Sorensen | mul_required = 1;
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332 | 9f9b17a4 | Jes Sorensen | } |
333 | 9f9b17a4 | Jes Sorensen | c = *endptr; |
334 | eba90e4e | Markus Armbruster | mul = suffix_mul(c, unit); |
335 | eba90e4e | Markus Armbruster | if (mul >= 0) { |
336 | eba90e4e | Markus Armbruster | endptr++; |
337 | eba90e4e | Markus Armbruster | } else {
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338 | eba90e4e | Markus Armbruster | mul = suffix_mul(default_suffix, unit); |
339 | eba90e4e | Markus Armbruster | assert(mul >= 0);
|
340 | 9f9b17a4 | Jes Sorensen | } |
341 | eba90e4e | Markus Armbruster | if (mul == 1 && mul_required) { |
342 | 9f9b17a4 | Jes Sorensen | goto fail;
|
343 | 9f9b17a4 | Jes Sorensen | } |
344 | 70b4f4bb | Jes Sorensen | if ((val * mul >= INT64_MAX) || val < 0) { |
345 | 9f9b17a4 | Jes Sorensen | goto fail;
|
346 | 9f9b17a4 | Jes Sorensen | } |
347 | 9f9b17a4 | Jes Sorensen | retval = val * mul; |
348 | 9f9b17a4 | Jes Sorensen | |
349 | 9f9b17a4 | Jes Sorensen | fail:
|
350 | 9f9b17a4 | Jes Sorensen | if (end) {
|
351 | 9f9b17a4 | Jes Sorensen | *end = endptr; |
352 | 9f9b17a4 | Jes Sorensen | } |
353 | 9f9b17a4 | Jes Sorensen | |
354 | 9f9b17a4 | Jes Sorensen | return retval;
|
355 | 9f9b17a4 | Jes Sorensen | } |
356 | d8427002 | Jes Sorensen | |
357 | a732e1ba | Joerg Roedel | int64_t strtosz_suffix(const char *nptr, char **end, const char default_suffix) |
358 | a732e1ba | Joerg Roedel | { |
359 | fdc9c41a | Jan Kiszka | return strtosz_suffix_unit(nptr, end, default_suffix, 1024); |
360 | a732e1ba | Joerg Roedel | } |
361 | a732e1ba | Joerg Roedel | |
362 | 70b4f4bb | Jes Sorensen | int64_t strtosz(const char *nptr, char **end) |
363 | d8427002 | Jes Sorensen | { |
364 | d8427002 | Jes Sorensen | return strtosz_suffix(nptr, end, STRTOSZ_DEFSUFFIX_MB);
|
365 | d8427002 | Jes Sorensen | } |
366 | 443916d1 | Stefan Berger | |
367 | 443916d1 | Stefan Berger | int qemu_parse_fd(const char *param) |
368 | 443916d1 | Stefan Berger | { |
369 | 443916d1 | Stefan Berger | int fd;
|
370 | 443916d1 | Stefan Berger | char *endptr = NULL; |
371 | 443916d1 | Stefan Berger | |
372 | 443916d1 | Stefan Berger | fd = strtol(param, &endptr, 10);
|
373 | 443916d1 | Stefan Berger | if (*endptr || (fd == 0 && param == endptr)) { |
374 | 443916d1 | Stefan Berger | return -1; |
375 | 443916d1 | Stefan Berger | } |
376 | 443916d1 | Stefan Berger | return fd;
|
377 | 443916d1 | Stefan Berger | } |
378 | 8c5135f9 | Paolo Bonzini | |
379 | e3e87df4 | Michael Tokarev | ssize_t iov_send_recv(int sockfd, struct iovec *iov, |
380 | e3e87df4 | Michael Tokarev | size_t offset, size_t bytes, |
381 | e3e87df4 | Michael Tokarev | bool do_sendv)
|
382 | 8c5135f9 | Paolo Bonzini | { |
383 | 3e80bf93 | Michael Tokarev | int iovlen;
|
384 | 3e80bf93 | Michael Tokarev | ssize_t ret; |
385 | 3e80bf93 | Michael Tokarev | size_t diff; |
386 | 8c5135f9 | Paolo Bonzini | struct iovec *last_iov;
|
387 | 8c5135f9 | Paolo Bonzini | |
388 | 8c5135f9 | Paolo Bonzini | /* last_iov is inclusive, so count from one. */
|
389 | 8c5135f9 | Paolo Bonzini | iovlen = 1;
|
390 | 8c5135f9 | Paolo Bonzini | last_iov = iov; |
391 | 3e80bf93 | Michael Tokarev | bytes += offset; |
392 | 8c5135f9 | Paolo Bonzini | |
393 | 3e80bf93 | Michael Tokarev | while (last_iov->iov_len < bytes) {
|
394 | 3e80bf93 | Michael Tokarev | bytes -= last_iov->iov_len; |
395 | 8c5135f9 | Paolo Bonzini | |
396 | 8c5135f9 | Paolo Bonzini | last_iov++; |
397 | 8c5135f9 | Paolo Bonzini | iovlen++; |
398 | 8c5135f9 | Paolo Bonzini | } |
399 | 8c5135f9 | Paolo Bonzini | |
400 | 3e80bf93 | Michael Tokarev | diff = last_iov->iov_len - bytes; |
401 | 8c5135f9 | Paolo Bonzini | last_iov->iov_len -= diff; |
402 | 8c5135f9 | Paolo Bonzini | |
403 | 8c5135f9 | Paolo Bonzini | while (iov->iov_len <= offset) {
|
404 | 8c5135f9 | Paolo Bonzini | offset -= iov->iov_len; |
405 | 8c5135f9 | Paolo Bonzini | |
406 | 8c5135f9 | Paolo Bonzini | iov++; |
407 | 8c5135f9 | Paolo Bonzini | iovlen--; |
408 | 8c5135f9 | Paolo Bonzini | } |
409 | 8c5135f9 | Paolo Bonzini | |
410 | 8c5135f9 | Paolo Bonzini | iov->iov_base = (char *) iov->iov_base + offset;
|
411 | 8c5135f9 | Paolo Bonzini | iov->iov_len -= offset; |
412 | 8c5135f9 | Paolo Bonzini | |
413 | 8c5135f9 | Paolo Bonzini | { |
414 | 8c5135f9 | Paolo Bonzini | #if defined CONFIG_IOVEC && defined CONFIG_POSIX
|
415 | 8c5135f9 | Paolo Bonzini | struct msghdr msg;
|
416 | 8c5135f9 | Paolo Bonzini | memset(&msg, 0, sizeof(msg)); |
417 | 8c5135f9 | Paolo Bonzini | msg.msg_iov = iov; |
418 | 8c5135f9 | Paolo Bonzini | msg.msg_iovlen = iovlen; |
419 | 8c5135f9 | Paolo Bonzini | |
420 | 8c5135f9 | Paolo Bonzini | do {
|
421 | 8c5135f9 | Paolo Bonzini | if (do_sendv) {
|
422 | 8c5135f9 | Paolo Bonzini | ret = sendmsg(sockfd, &msg, 0);
|
423 | 8c5135f9 | Paolo Bonzini | } else {
|
424 | 8c5135f9 | Paolo Bonzini | ret = recvmsg(sockfd, &msg, 0);
|
425 | 8c5135f9 | Paolo Bonzini | } |
426 | 8c5135f9 | Paolo Bonzini | } while (ret == -1 && errno == EINTR); |
427 | 8c5135f9 | Paolo Bonzini | #else
|
428 | 8c5135f9 | Paolo Bonzini | struct iovec *p = iov;
|
429 | 8c5135f9 | Paolo Bonzini | ret = 0;
|
430 | 8c5135f9 | Paolo Bonzini | while (iovlen > 0) { |
431 | 8c5135f9 | Paolo Bonzini | int rc;
|
432 | 8c5135f9 | Paolo Bonzini | if (do_sendv) {
|
433 | 8c5135f9 | Paolo Bonzini | rc = send(sockfd, p->iov_base, p->iov_len, 0);
|
434 | 8c5135f9 | Paolo Bonzini | } else {
|
435 | 8c5135f9 | Paolo Bonzini | rc = qemu_recv(sockfd, p->iov_base, p->iov_len, 0);
|
436 | 8c5135f9 | Paolo Bonzini | } |
437 | 8c5135f9 | Paolo Bonzini | if (rc == -1) { |
438 | 8c5135f9 | Paolo Bonzini | if (errno == EINTR) {
|
439 | 8c5135f9 | Paolo Bonzini | continue;
|
440 | 8c5135f9 | Paolo Bonzini | } |
441 | 8c5135f9 | Paolo Bonzini | if (ret == 0) { |
442 | 8c5135f9 | Paolo Bonzini | ret = -1;
|
443 | 8c5135f9 | Paolo Bonzini | } |
444 | 8c5135f9 | Paolo Bonzini | break;
|
445 | 8c5135f9 | Paolo Bonzini | } |
446 | 8c5135f9 | Paolo Bonzini | if (rc == 0) { |
447 | 8c5135f9 | Paolo Bonzini | break;
|
448 | 8c5135f9 | Paolo Bonzini | } |
449 | 8c5135f9 | Paolo Bonzini | ret += rc; |
450 | 8c5135f9 | Paolo Bonzini | iovlen--, p++; |
451 | 8c5135f9 | Paolo Bonzini | } |
452 | 8c5135f9 | Paolo Bonzini | #endif
|
453 | 8c5135f9 | Paolo Bonzini | } |
454 | 8c5135f9 | Paolo Bonzini | |
455 | 8c5135f9 | Paolo Bonzini | /* Undo the changes above */
|
456 | 8c5135f9 | Paolo Bonzini | iov->iov_base = (char *) iov->iov_base - offset;
|
457 | 8c5135f9 | Paolo Bonzini | iov->iov_len += offset; |
458 | 8c5135f9 | Paolo Bonzini | last_iov->iov_len += diff; |
459 | 8c5135f9 | Paolo Bonzini | return ret;
|
460 | 8c5135f9 | Paolo Bonzini | } |