Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 1 | /* |
| 2 | * IO verification helpers |
| 3 | */ |
| 4 | #include <unistd.h> |
| 5 | #include <fcntl.h> |
| 6 | #include <string.h> |
Jens Axboe | 97af62c | 2007-05-22 11:12:13 +0200 | [diff] [blame] | 7 | #include <assert.h> |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 8 | |
| 9 | #include "fio.h" |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 10 | |
Jens Axboe | 90059d6 | 2007-07-30 09:33:12 +0200 | [diff] [blame] | 11 | static void fill_random_bytes(struct thread_data *td, void *p, unsigned int len) |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 12 | { |
| 13 | unsigned int todo; |
Jens Axboe | 4c5946c | 2007-07-26 11:55:10 +0200 | [diff] [blame] | 14 | int r; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 15 | |
| 16 | while (len) { |
Jens Axboe | 4c5946c | 2007-07-26 11:55:10 +0200 | [diff] [blame] | 17 | r = os_random_long(&td->verify_state); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 18 | |
| 19 | /* |
| 20 | * lrand48_r seems to be broken and only fill the bottom |
| 21 | * 32-bits, even on 64-bit archs with 64-bit longs |
| 22 | */ |
| 23 | todo = sizeof(r); |
| 24 | if (todo > len) |
| 25 | todo = len; |
| 26 | |
| 27 | memcpy(p, &r, todo); |
| 28 | |
| 29 | len -= todo; |
| 30 | p += todo; |
| 31 | } |
| 32 | } |
| 33 | |
Jens Axboe | 90059d6 | 2007-07-30 09:33:12 +0200 | [diff] [blame] | 34 | static void fill_pattern(struct thread_data *td, void *p, unsigned int len) |
| 35 | { |
| 36 | switch (td->o.verify_pattern_bytes) { |
| 37 | case 0: |
| 38 | fill_random_bytes(td, p, len); |
| 39 | break; |
| 40 | case 1: |
| 41 | memset(p, td->o.verify_pattern, len); |
| 42 | break; |
| 43 | case 2: |
| 44 | case 3: |
| 45 | case 4: { |
| 46 | unsigned int pattern = td->o.verify_pattern; |
| 47 | unsigned int i = 0; |
| 48 | unsigned char c1, c2, c3, c4; |
| 49 | unsigned char *b = p; |
| 50 | |
| 51 | c1 = pattern & 0xff; |
| 52 | pattern >>= 8; |
| 53 | c2 = pattern & 0xff; |
| 54 | pattern >>= 8; |
| 55 | c3 = pattern & 0xff; |
| 56 | pattern >>= 8; |
| 57 | c4 = pattern & 0xff; |
| 58 | |
| 59 | while (i < len) { |
| 60 | b[i++] = c1; |
| 61 | if (i == len) |
| 62 | break; |
| 63 | b[i++] = c2; |
| 64 | if (td->o.verify_pattern_bytes == 2 || i == len) |
| 65 | continue; |
| 66 | b[i++] = c3; |
| 67 | if (td->o.verify_pattern_bytes == 3 || i == len) |
| 68 | continue; |
| 69 | b[i++] = c4; |
| 70 | } |
| 71 | break; |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | static void memswp(void* buf1, void* buf2, unsigned int len) |
Shawn Lewis | 546a914 | 2007-07-28 21:11:37 +0200 | [diff] [blame] | 77 | { |
| 78 | struct verify_header swap; |
Jens Axboe | 90059d6 | 2007-07-30 09:33:12 +0200 | [diff] [blame] | 79 | |
Shawn Lewis | 546a914 | 2007-07-28 21:11:37 +0200 | [diff] [blame] | 80 | memcpy(&swap, buf1, len); |
| 81 | memcpy(buf1, buf2, len); |
| 82 | memcpy(buf2, &swap, len); |
| 83 | } |
| 84 | |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 85 | static void hexdump(void *buffer, int len) |
| 86 | { |
| 87 | unsigned char *p = buffer; |
| 88 | int i; |
| 89 | |
| 90 | for (i = 0; i < len; i++) |
Jens Axboe | 6d86144 | 2007-03-15 09:22:23 +0100 | [diff] [blame] | 91 | log_info("%02x", p[i]); |
| 92 | log_info("\n"); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 93 | } |
| 94 | |
Jens Axboe | d9f2caf | 2007-07-28 21:22:03 +0200 | [diff] [blame] | 95 | /* |
| 96 | * Return data area 'header_num' |
| 97 | */ |
| 98 | static inline void *io_u_verify_off(struct verify_header *hdr, |
| 99 | struct io_u *io_u, |
| 100 | unsigned char header_num) |
| 101 | { |
| 102 | return io_u->buf + sizeof(*hdr) + header_num * hdr->len; |
| 103 | } |
| 104 | |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 105 | static int verify_io_u_crc7(struct verify_header *hdr, struct io_u *io_u, |
| 106 | unsigned char header_num) |
Jens Axboe | 1e154bd | 2007-07-27 09:52:40 +0200 | [diff] [blame] | 107 | { |
Jens Axboe | d9f2caf | 2007-07-28 21:22:03 +0200 | [diff] [blame] | 108 | void *p = io_u_verify_off(hdr, io_u, header_num); |
Jens Axboe | 1e154bd | 2007-07-27 09:52:40 +0200 | [diff] [blame] | 109 | unsigned char c; |
| 110 | |
Jens Axboe | 1e154bd | 2007-07-27 09:52:40 +0200 | [diff] [blame] | 111 | c = crc7(p, hdr->len - sizeof(*hdr)); |
| 112 | |
| 113 | if (c != hdr->crc7) { |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 114 | log_err("crc7: verify failed at %llu/%u\n", |
| 115 | io_u->offset + header_num * hdr->len, |
| 116 | hdr->len); |
Jens Axboe | 1e154bd | 2007-07-27 09:52:40 +0200 | [diff] [blame] | 117 | log_err("crc7: wanted %x, got %x\n", hdr->crc7, c); |
| 118 | return 1; |
| 119 | } |
| 120 | |
| 121 | return 0; |
| 122 | } |
| 123 | |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 124 | static int verify_io_u_crc16(struct verify_header *hdr, struct io_u *io_u, |
| 125 | unsigned int header_num) |
Jens Axboe | 969f7ed | 2007-07-27 09:07:17 +0200 | [diff] [blame] | 126 | { |
Jens Axboe | d9f2caf | 2007-07-28 21:22:03 +0200 | [diff] [blame] | 127 | void *p = io_u_verify_off(hdr, io_u, header_num); |
Jens Axboe | 969f7ed | 2007-07-27 09:07:17 +0200 | [diff] [blame] | 128 | unsigned short c; |
| 129 | |
Jens Axboe | 969f7ed | 2007-07-27 09:07:17 +0200 | [diff] [blame] | 130 | c = crc16(p, hdr->len - sizeof(*hdr)); |
| 131 | |
| 132 | if (c != hdr->crc16) { |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 133 | log_err("crc16: verify failed at %llu/%u\n", |
| 134 | io_u->offset + header_num * hdr->len, |
| 135 | hdr->len); |
Jens Axboe | 1f24ea4 | 2007-07-27 09:53:14 +0200 | [diff] [blame] | 136 | log_err("crc16: wanted %x, got %x\n", hdr->crc16, c); |
Jens Axboe | 969f7ed | 2007-07-27 09:07:17 +0200 | [diff] [blame] | 137 | return 1; |
| 138 | } |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 143 | static int verify_io_u_crc64(struct verify_header *hdr, struct io_u *io_u, |
| 144 | unsigned int header_num) |
Jens Axboe | d77a7af | 2007-07-27 15:35:06 +0200 | [diff] [blame] | 145 | { |
Jens Axboe | d9f2caf | 2007-07-28 21:22:03 +0200 | [diff] [blame] | 146 | void *p = io_u_verify_off(hdr, io_u, header_num); |
Jens Axboe | d77a7af | 2007-07-27 15:35:06 +0200 | [diff] [blame] | 147 | unsigned long long c; |
| 148 | |
| 149 | c = crc64(p, hdr->len - sizeof(*hdr)); |
| 150 | |
| 151 | if (c != hdr->crc64) { |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 152 | log_err("crc64: verify failed at %llu/%u\n", |
| 153 | io_u->offset + header_num * hdr->len, |
| 154 | hdr->len); |
Jens Axboe | d77a7af | 2007-07-27 15:35:06 +0200 | [diff] [blame] | 155 | log_err("crc64: wanted %llx, got %llx\n", hdr->crc64, c); |
| 156 | return 1; |
| 157 | } |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 162 | static int verify_io_u_crc32(struct verify_header *hdr, struct io_u *io_u, |
| 163 | unsigned int header_num) |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 164 | { |
Jens Axboe | d9f2caf | 2007-07-28 21:22:03 +0200 | [diff] [blame] | 165 | void *p = io_u_verify_off(hdr, io_u, header_num); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 166 | unsigned long c; |
| 167 | |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 168 | c = crc32(p, hdr->len - sizeof(*hdr)); |
| 169 | |
| 170 | if (c != hdr->crc32) { |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 171 | log_err("crc32: verify failed at %llu/%u\n", |
| 172 | io_u->offset + header_num * hdr->len, |
| 173 | hdr->len); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 174 | log_err("crc32: wanted %lx, got %lx\n", hdr->crc32, c); |
| 175 | return 1; |
| 176 | } |
| 177 | |
| 178 | return 0; |
| 179 | } |
| 180 | |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 181 | static int verify_io_u_md5(struct verify_header *hdr, struct io_u *io_u, |
| 182 | unsigned int header_num) |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 183 | { |
Jens Axboe | d9f2caf | 2007-07-28 21:22:03 +0200 | [diff] [blame] | 184 | void *p = io_u_verify_off(hdr, io_u, header_num); |
Jens Axboe | 8c43232 | 2007-07-27 13:16:24 +0200 | [diff] [blame] | 185 | uint32_t hash[MD5_HASH_WORDS]; |
| 186 | struct md5_ctx md5_ctx = { |
| 187 | .hash = hash, |
| 188 | }; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 189 | |
Jens Axboe | fd00954 | 2007-07-29 20:59:01 +0200 | [diff] [blame] | 190 | memset(md5_ctx.hash, 0, sizeof(hdr->md5_digest)); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 191 | md5_update(&md5_ctx, p, hdr->len - sizeof(*hdr)); |
| 192 | |
Jens Axboe | c9b3fdf | 2007-07-29 08:49:16 +0200 | [diff] [blame] | 193 | if (memcmp(hdr->md5_digest, md5_ctx.hash, sizeof(hash))) { |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 194 | log_err("md5: verify failed at %llu/%u\n", |
| 195 | io_u->offset + header_num * hdr->len, |
| 196 | hdr->len); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 197 | hexdump(hdr->md5_digest, sizeof(hdr->md5_digest)); |
Jens Axboe | 8c43232 | 2007-07-27 13:16:24 +0200 | [diff] [blame] | 198 | hexdump(md5_ctx.hash, sizeof(hash)); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 199 | return 1; |
| 200 | } |
| 201 | |
| 202 | return 0; |
| 203 | } |
| 204 | |
Jens Axboe | 36690c9 | 2007-03-26 10:23:34 +0200 | [diff] [blame] | 205 | int verify_io_u(struct thread_data *td, struct io_u *io_u) |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 206 | { |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 207 | struct verify_header *hdr; |
| 208 | unsigned int hdr_inc, hdr_num = 0; |
Jens Axboe | 9564610 | 2007-07-28 21:17:50 +0200 | [diff] [blame] | 209 | void *p; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 210 | int ret; |
| 211 | |
Shawn Lewis | 1dcc049 | 2007-07-27 08:02:45 +0200 | [diff] [blame] | 212 | if (td->o.verify == VERIFY_NULL || io_u->ddir != DDIR_READ) |
Jens Axboe | 36690c9 | 2007-03-26 10:23:34 +0200 | [diff] [blame] | 213 | return 0; |
| 214 | |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 215 | hdr_inc = io_u->buflen; |
Jens Axboe | a59e170 | 2007-07-30 08:53:27 +0200 | [diff] [blame] | 216 | if (td->o.verify_interval) |
| 217 | hdr_inc = td->o.verify_interval; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 218 | |
Jens Axboe | 9564610 | 2007-07-28 21:17:50 +0200 | [diff] [blame] | 219 | for (p = io_u->buf; p < io_u->buf + io_u->buflen; p += hdr_inc) { |
Jens Axboe | a59e170 | 2007-07-30 08:53:27 +0200 | [diff] [blame] | 220 | if (td->o.verify_offset) |
| 221 | memswp(p, p + td->o.verify_offset, sizeof(*hdr)); |
Shawn Lewis | 546a914 | 2007-07-28 21:11:37 +0200 | [diff] [blame] | 222 | |
Jens Axboe | 9564610 | 2007-07-28 21:17:50 +0200 | [diff] [blame] | 223 | hdr = p; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 224 | |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 225 | if (hdr->fio_magic != FIO_HDR_MAGIC) { |
| 226 | log_err("Bad verify header %x\n", hdr->fio_magic); |
| 227 | return EIO; |
| 228 | } |
| 229 | |
| 230 | switch (hdr->verify_type) { |
| 231 | case VERIFY_MD5: |
| 232 | ret = verify_io_u_md5(hdr, io_u, hdr_num); |
| 233 | break; |
| 234 | case VERIFY_CRC64: |
| 235 | ret = verify_io_u_crc64(hdr, io_u, hdr_num); |
| 236 | break; |
| 237 | case VERIFY_CRC32: |
| 238 | ret = verify_io_u_crc32(hdr, io_u, hdr_num); |
| 239 | break; |
| 240 | case VERIFY_CRC16: |
| 241 | ret = verify_io_u_crc16(hdr, io_u, hdr_num); |
| 242 | break; |
| 243 | case VERIFY_CRC7: |
| 244 | ret = verify_io_u_crc7(hdr, io_u, hdr_num); |
| 245 | break; |
| 246 | default: |
| 247 | log_err("Bad verify type %u\n", hdr->verify_type); |
| 248 | ret = 1; |
| 249 | } |
| 250 | hdr_num++; |
| 251 | } |
Jens Axboe | a7dfe86 | 2007-03-12 10:05:08 +0100 | [diff] [blame] | 252 | |
| 253 | return 0; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 254 | } |
| 255 | |
Jens Axboe | 1e154bd | 2007-07-27 09:52:40 +0200 | [diff] [blame] | 256 | static void fill_crc7(struct verify_header *hdr, void *p, unsigned int len) |
| 257 | { |
| 258 | hdr->crc7 = crc7(p, len); |
| 259 | } |
| 260 | |
Jens Axboe | 969f7ed | 2007-07-27 09:07:17 +0200 | [diff] [blame] | 261 | static void fill_crc16(struct verify_header *hdr, void *p, unsigned int len) |
| 262 | { |
| 263 | hdr->crc16 = crc16(p, len); |
| 264 | } |
| 265 | |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 266 | static void fill_crc32(struct verify_header *hdr, void *p, unsigned int len) |
| 267 | { |
| 268 | hdr->crc32 = crc32(p, len); |
| 269 | } |
| 270 | |
Jens Axboe | d77a7af | 2007-07-27 15:35:06 +0200 | [diff] [blame] | 271 | static void fill_crc64(struct verify_header *hdr, void *p, unsigned int len) |
| 272 | { |
| 273 | hdr->crc64 = crc64(p, len); |
| 274 | } |
| 275 | |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 276 | static void fill_md5(struct verify_header *hdr, void *p, unsigned int len) |
| 277 | { |
Jens Axboe | 8c43232 | 2007-07-27 13:16:24 +0200 | [diff] [blame] | 278 | struct md5_ctx md5_ctx = { |
| 279 | .hash = (uint32_t *) hdr->md5_digest, |
| 280 | }; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 281 | |
Jens Axboe | fd00954 | 2007-07-29 20:59:01 +0200 | [diff] [blame] | 282 | memset(md5_ctx.hash, 0, sizeof(hdr->md5_digest)); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 283 | md5_update(&md5_ctx, p, len); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | /* |
| 287 | * fill body of io_u->buf with random data and add a header with the |
| 288 | * crc32 or md5 sum of that data. |
| 289 | */ |
| 290 | void populate_verify_io_u(struct thread_data *td, struct io_u *io_u) |
| 291 | { |
Jens Axboe | baefa9b | 2007-07-27 12:57:25 +0200 | [diff] [blame] | 292 | struct verify_header *hdr; |
Jens Axboe | 9564610 | 2007-07-28 21:17:50 +0200 | [diff] [blame] | 293 | void *p = io_u->buf, *data; |
Shawn Lewis | 546a914 | 2007-07-28 21:11:37 +0200 | [diff] [blame] | 294 | unsigned int hdr_inc, data_len; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 295 | |
Jens Axboe | 9cc3d15 | 2007-03-26 10:32:30 +0200 | [diff] [blame] | 296 | if (td->o.verify == VERIFY_NULL) |
| 297 | return; |
| 298 | |
Jens Axboe | 90059d6 | 2007-07-30 09:33:12 +0200 | [diff] [blame] | 299 | fill_pattern(td, p, io_u->buflen); |
Jens Axboe | baefa9b | 2007-07-27 12:57:25 +0200 | [diff] [blame] | 300 | |
Shawn Lewis | 546a914 | 2007-07-28 21:11:37 +0200 | [diff] [blame] | 301 | hdr_inc = io_u->buflen; |
Jens Axboe | a59e170 | 2007-07-30 08:53:27 +0200 | [diff] [blame] | 302 | if (td->o.verify_interval) |
| 303 | hdr_inc = td->o.verify_interval; |
Shawn Lewis | 546a914 | 2007-07-28 21:11:37 +0200 | [diff] [blame] | 304 | data_len = hdr_inc - sizeof(*hdr); |
| 305 | |
Jens Axboe | 9564610 | 2007-07-28 21:17:50 +0200 | [diff] [blame] | 306 | for (;p < io_u->buf + io_u->buflen; p += hdr_inc) { |
| 307 | hdr = p; |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 308 | |
| 309 | hdr->fio_magic = FIO_HDR_MAGIC; |
| 310 | hdr->verify_type = td->o.verify; |
Shawn Lewis | 546a914 | 2007-07-28 21:11:37 +0200 | [diff] [blame] | 311 | hdr->len = hdr_inc; |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 312 | |
| 313 | data = p + sizeof(*hdr); |
Shawn Lewis | 3f9f4e2 | 2007-07-28 21:10:37 +0200 | [diff] [blame] | 314 | switch (td->o.verify) { |
| 315 | case VERIFY_MD5: |
| 316 | fill_md5(hdr, data, data_len); |
| 317 | break; |
| 318 | case VERIFY_CRC64: |
| 319 | fill_crc64(hdr, data, data_len); |
| 320 | break; |
| 321 | case VERIFY_CRC32: |
| 322 | fill_crc32(hdr, data, data_len); |
| 323 | break; |
| 324 | case VERIFY_CRC16: |
| 325 | fill_crc16(hdr, data, data_len); |
| 326 | break; |
| 327 | case VERIFY_CRC7: |
| 328 | fill_crc7(hdr, data, data_len); |
| 329 | break; |
| 330 | default: |
| 331 | log_err("fio: bad verify type: %d\n", td->o.verify); |
| 332 | assert(0); |
| 333 | } |
Jens Axboe | a59e170 | 2007-07-30 08:53:27 +0200 | [diff] [blame] | 334 | if (td->o.verify_offset) |
| 335 | memswp(p, p + td->o.verify_offset, sizeof(*hdr)); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 336 | } |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 337 | } |
| 338 | |
| 339 | int get_next_verify(struct thread_data *td, struct io_u *io_u) |
| 340 | { |
Jens Axboe | 8de8f04 | 2007-03-27 10:36:12 +0200 | [diff] [blame] | 341 | struct io_piece *ipo = NULL; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 342 | |
Jens Axboe | d2d7fa5 | 2007-02-19 13:21:35 +0100 | [diff] [blame] | 343 | /* |
| 344 | * this io_u is from a requeue, we already filled the offsets |
| 345 | */ |
| 346 | if (io_u->file) |
| 347 | return 0; |
| 348 | |
Jens Axboe | 8de8f04 | 2007-03-27 10:36:12 +0200 | [diff] [blame] | 349 | if (!RB_EMPTY_ROOT(&td->io_hist_tree)) { |
| 350 | struct rb_node *n = rb_first(&td->io_hist_tree); |
| 351 | |
Jens Axboe | 4b87898 | 2007-03-26 09:32:22 +0200 | [diff] [blame] | 352 | ipo = rb_entry(n, struct io_piece, rb_node); |
Jens Axboe | 4b87898 | 2007-03-26 09:32:22 +0200 | [diff] [blame] | 353 | rb_erase(n, &td->io_hist_tree); |
Jens Axboe | 8de8f04 | 2007-03-27 10:36:12 +0200 | [diff] [blame] | 354 | } else if (!list_empty(&td->io_hist_list)) { |
| 355 | ipo = list_entry(td->io_hist_list.next, struct io_piece, list); |
| 356 | list_del(&ipo->list); |
| 357 | } |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 358 | |
Jens Axboe | 8de8f04 | 2007-03-27 10:36:12 +0200 | [diff] [blame] | 359 | if (ipo) { |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 360 | io_u->offset = ipo->offset; |
| 361 | io_u->buflen = ipo->len; |
Jens Axboe | 36167d8 | 2007-02-18 05:41:31 +0100 | [diff] [blame] | 362 | io_u->file = ipo->file; |
Jens Axboe | 97af62c | 2007-05-22 11:12:13 +0200 | [diff] [blame] | 363 | |
| 364 | if ((io_u->file->flags & FIO_FILE_OPEN) == 0) { |
| 365 | int r = td_io_open_file(td, io_u->file); |
| 366 | |
| 367 | if (r) |
| 368 | return 1; |
| 369 | } |
| 370 | |
| 371 | get_file(ipo->file); |
| 372 | assert(io_u->file->flags & FIO_FILE_OPEN); |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 373 | io_u->ddir = DDIR_READ; |
Jens Axboe | 36167d8 | 2007-02-18 05:41:31 +0100 | [diff] [blame] | 374 | io_u->xfer_buf = io_u->buf; |
| 375 | io_u->xfer_buflen = io_u->buflen; |
Jens Axboe | e29d1b7 | 2006-10-18 15:43:15 +0200 | [diff] [blame] | 376 | free(ipo); |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | return 1; |
| 381 | } |