Fix bad int truncate in verify
[fio.git] / log.c
1 /*
2  * Code related to writing an iolog of what a thread is doing, and to
3  * later read that back and replay
4  */
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <libgen.h>
8 #include <assert.h>
9 #include "flist.h"
10 #include "fio.h"
11 #include "verify.h"
12
13 static const char iolog_ver2[] = "fio version 2 iolog";
14
15 void queue_io_piece(struct thread_data *td, struct io_piece *ipo)
16 {
17         flist_add_tail(&ipo->list, &td->io_log_list);
18         td->total_io_size += ipo->len;
19 }
20
21 void log_io_u(struct thread_data *td, struct io_u *io_u)
22 {
23         const char *act[] = { "read", "write", "sync", "datasync",
24                                 "sync_file_range" };
25
26         assert(io_u->ddir <= 4);
27
28         if (!td->o.write_iolog_file)
29                 return;
30
31         fprintf(td->iolog_f, "%s %s %llu %lu\n", io_u->file->file_name,
32                                                 act[io_u->ddir], io_u->offset,
33                                                 io_u->buflen);
34 }
35
36 void log_file(struct thread_data *td, struct fio_file *f,
37               enum file_log_act what)
38 {
39         const char *act[] = { "add", "open", "close" };
40
41         assert(what < 3);
42
43         if (!td->o.write_iolog_file)
44                 return;
45
46
47         /*
48          * this happens on the pre-open/close done before the job starts
49          */
50         if (!td->iolog_f)
51                 return;
52
53         fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]);
54 }
55
56 static void iolog_delay(struct thread_data *td, unsigned long delay)
57 {
58         unsigned long usec = utime_since_now(&td->last_issue);
59
60         if (delay < usec)
61                 return;
62
63         delay -= usec;
64
65         /*
66          * less than 100 usec delay, just regard it as noise
67          */
68         if (delay < 100)
69                 return;
70
71         usec_sleep(td, delay);
72 }
73
74 static int ipo_special(struct thread_data *td, struct io_piece *ipo)
75 {
76         struct fio_file *f;
77         int ret;
78
79         /*
80          * Not a special ipo
81          */
82         if (ipo->ddir != DDIR_INVAL)
83                 return 0;
84
85         f = td->files[ipo->fileno];
86
87         switch (ipo->file_action) {
88         case FIO_LOG_OPEN_FILE:
89                 ret = td_io_open_file(td, f);
90                 if (!ret)
91                         break;
92                 td_verror(td, ret, "iolog open file");
93                 return -1;
94         case FIO_LOG_CLOSE_FILE:
95                 td_io_close_file(td, f);
96                 break;
97         case FIO_LOG_UNLINK_FILE:
98                 unlink(f->file_name);
99                 break;
100         default:
101                 log_err("fio: bad file action %d\n", ipo->file_action);
102                 break;
103         }
104
105         return 1;
106 }
107
108 int read_iolog_get(struct thread_data *td, struct io_u *io_u)
109 {
110         struct io_piece *ipo;
111         unsigned long elapsed;
112         
113         while (!flist_empty(&td->io_log_list)) {
114                 int ret;
115
116                 ipo = flist_entry(td->io_log_list.next, struct io_piece, list);
117                 flist_del(&ipo->list);
118
119                 ret = ipo_special(td, ipo);
120                 if (ret < 0) {
121                         free(ipo);
122                         break;
123                 } else if (ret > 0) {
124                         free(ipo);
125                         continue;
126                 }
127
128                 io_u->ddir = ipo->ddir;
129                 if (ipo->ddir != DDIR_WAIT) {
130                         io_u->offset = ipo->offset;
131                         io_u->buflen = ipo->len;
132                         io_u->file = td->files[ipo->fileno];
133                         get_file(io_u->file);
134
135                         dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset,
136                                                 io_u->buflen, io_u->file->file_name);
137                         if (ipo->delay) iolog_delay(td, ipo->delay);
138                 } else {
139                         elapsed = mtime_since_genesis();
140                         if (ipo->delay > elapsed)
141                                 usec_sleep(td, (ipo->delay - elapsed) * 1000);
142                                 
143                 }
144
145                 free(ipo);
146                 
147                 if (ipo->ddir != DDIR_WAIT)
148                         return 0;
149         }
150
151         td->done = 1;
152         return 1;
153 }
154
155 void prune_io_piece_log(struct thread_data *td)
156 {
157         struct io_piece *ipo;
158         struct rb_node *n;
159
160         while ((n = rb_first(&td->io_hist_tree)) != NULL) {
161                 ipo = rb_entry(n, struct io_piece, rb_node);
162                 rb_erase(n, &td->io_hist_tree);
163                 td->io_hist_len--;
164                 free(ipo);
165         }
166
167         while (!flist_empty(&td->io_hist_list)) {
168                 ipo = flist_entry(td->io_hist_list.next, struct io_piece, list);
169                 flist_del(&ipo->list);
170                 td->io_hist_len--;
171                 free(ipo);
172         }
173 }
174
175 /*
176  * log a successful write, so we can unwind the log for verify
177  */
178 void log_io_piece(struct thread_data *td, struct io_u *io_u)
179 {
180         struct rb_node **p, *parent;
181         struct io_piece *ipo, *__ipo;
182
183         ipo = malloc(sizeof(struct io_piece));
184         ipo->file = io_u->file;
185         ipo->offset = io_u->offset;
186         ipo->len = io_u->buflen;
187
188         /*
189          * We don't need to sort the entries, if:
190          *
191          *      Sequential writes, or
192          *      Random writes that lay out the file as it goes along
193          *
194          * For both these cases, just reading back data in the order we
195          * wrote it out is the fastest.
196          *
197          * One exception is if we don't have a random map AND we are doing
198          * verifies, in that case we need to check for duplicate blocks and
199          * drop the old one, which we rely on the rb insert/lookup for
200          * handling.
201          */
202         if ((!td_random(td) || !td->o.overwrite) &&
203               (file_randommap(td, ipo->file) || td->o.verify == VERIFY_NONE)) {
204                 INIT_FLIST_HEAD(&ipo->list);
205                 flist_add_tail(&ipo->list, &td->io_hist_list);
206                 td->io_hist_len++;
207                 return;
208         }
209
210         RB_CLEAR_NODE(&ipo->rb_node);
211
212         /*
213          * Sort the entry into the verification list
214          */
215 restart:
216         p = &td->io_hist_tree.rb_node;
217         parent = NULL;
218         while (*p) {
219                 parent = *p;
220
221                 __ipo = rb_entry(parent, struct io_piece, rb_node);
222                 if (ipo->offset < __ipo->offset)
223                         p = &(*p)->rb_left;
224                 else if (ipo->offset > __ipo->offset)
225                         p = &(*p)->rb_right;
226                 else {
227                         assert(ipo->len == __ipo->len);
228                         td->io_hist_len--;
229                         rb_erase(parent, &td->io_hist_tree);
230                         goto restart;
231                 }
232         }
233
234         rb_link_node(&ipo->rb_node, parent, p);
235         rb_insert_color(&ipo->rb_node, &td->io_hist_tree);
236         td->io_hist_len++;
237 }
238
239 void write_iolog_close(struct thread_data *td)
240 {
241         fflush(td->iolog_f);
242         fclose(td->iolog_f);
243         free(td->iolog_buf);
244         td->iolog_f = NULL;
245         td->iolog_buf = NULL;
246 }
247
248 /*
249  * Read version 2 iolog data. It is enhanced to include per-file logging,
250  * syncs, etc.
251  */
252 static int read_iolog2(struct thread_data *td, FILE *f)
253 {
254         unsigned long long offset;
255         unsigned int bytes;
256         int reads, writes, waits, fileno = 0, file_action = 0; /* stupid gcc */
257         char *fname, *act;
258         char *str, *p;
259         enum fio_ddir rw;
260
261         free_release_files(td);
262
263         /*
264          * Read in the read iolog and store it, reuse the infrastructure
265          * for doing verifications.
266          */
267         str = malloc(4096);
268         fname = malloc(256+16);
269         act = malloc(256+16);
270
271         reads = writes = waits = 0;
272         while ((p = fgets(str, 4096, f)) != NULL) {
273                 struct io_piece *ipo;
274                 int r;
275
276                 r = sscanf(p, "%256s %256s %llu %u", fname, act, &offset,
277                                                                         &bytes);
278                 if (r == 4) {
279                         /*
280                          * Check action first
281                          */
282                         if (!strcmp(act, "wait"))
283                                 rw = DDIR_WAIT;
284                         else if (!strcmp(act, "read"))
285                                 rw = DDIR_READ;
286                         else if (!strcmp(act, "write"))
287                                 rw = DDIR_WRITE;
288                         else if (!strcmp(act, "sync"))
289                                 rw = DDIR_SYNC;
290                         else if (!strcmp(act, "datasync"))
291                                 rw = DDIR_DATASYNC;
292                         else {
293                                 log_err("fio: bad iolog file action: %s\n",
294                                                                         act);
295                                 continue;
296                         }
297                 } else if (r == 2) {
298                         rw = DDIR_INVAL;
299                         if (!strcmp(act, "add")) {
300                                 td->o.nr_files++;
301                                 fileno = add_file(td, fname);
302                                 file_action = FIO_LOG_ADD_FILE;
303                                 continue;
304                         } else if (!strcmp(act, "open")) {
305                                 fileno = get_fileno(td, fname);
306                                 file_action = FIO_LOG_OPEN_FILE;
307                         } else if (!strcmp(act, "close")) {
308                                 fileno = get_fileno(td, fname);
309                                 file_action = FIO_LOG_CLOSE_FILE;
310                         } else {
311                                 log_err("fio: bad iolog file action: %s\n",
312                                                                         act);
313                                 continue;
314                         }
315                 } else {
316                         log_err("bad iolog2: %s", p);
317                         continue;
318                 }
319
320                 if (rw == DDIR_READ)
321                         reads++;
322                 else if (rw == DDIR_WRITE) {
323                         /*
324                          * Don't add a write for ro mode
325                          */
326                         if (read_only)
327                                 continue;
328                         writes++;
329                 } else if (rw == DDIR_WAIT) {
330                         waits++;
331                 } else if (rw == DDIR_INVAL) {
332                 } else if (!ddir_sync(rw)) {
333                         log_err("bad ddir: %d\n", rw);
334                         continue;
335                 }
336
337                 /*
338                  * Make note of file
339                  */
340                 ipo = malloc(sizeof(*ipo));
341                 memset(ipo, 0, sizeof(*ipo));
342                 INIT_FLIST_HEAD(&ipo->list);
343                 ipo->ddir = rw;
344                 if (rw == DDIR_WAIT) {
345                         ipo->delay = offset;
346                 } else {
347                         ipo->offset = offset;
348                         ipo->len = bytes;
349                         if (bytes > td->o.max_bs[rw])
350                                 td->o.max_bs[rw] = bytes;
351                         ipo->fileno = fileno;
352                         ipo->file_action = file_action;
353                 }
354                         
355                 queue_io_piece(td, ipo);
356         }
357
358         free(str);
359         free(act);
360         free(fname);
361
362         if (writes && read_only) {
363                 log_err("fio: <%s> skips replay of %d writes due to"
364                         " read-only\n", td->o.name, writes);
365                 writes = 0;
366         }
367
368         if (!reads && !writes && !waits)
369                 return 1;
370         else if (reads && !writes)
371                 td->o.td_ddir = TD_DDIR_READ;
372         else if (!reads && writes)
373                 td->o.td_ddir = TD_DDIR_WRITE;
374         else
375                 td->o.td_ddir = TD_DDIR_RW;
376
377         return 0;
378 }
379
380 /*
381  * open iolog, check version, and call appropriate parser
382  */
383 static int init_iolog_read(struct thread_data *td)
384 {
385         char buffer[256], *p;
386         FILE *f;
387         int ret;
388
389         f = fopen(td->o.read_iolog_file, "r");
390         if (!f) {
391                 perror("fopen read iolog");
392                 return 1;
393         }
394
395         p = fgets(buffer, sizeof(buffer), f);
396         if (!p) {
397                 td_verror(td, errno, "iolog read");
398                 log_err("fio: unable to read iolog\n");
399                 return 1;
400         }
401
402         /*
403          * version 2 of the iolog stores a specific string as the
404          * first line, check for that
405          */
406         if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2)))
407                 ret = read_iolog2(td, f);
408         else {
409                 log_err("fio: iolog version 1 is no longer supported\n");
410                 ret = 1;
411         }
412
413         fclose(f);
414         return ret;
415 }
416
417 /*
418  * Setup a log for storing io patterns.
419  */
420 static int init_iolog_write(struct thread_data *td)
421 {
422         struct fio_file *ff;
423         FILE *f;
424         unsigned int i;
425
426         f = fopen(td->o.write_iolog_file, "a");
427         if (!f) {
428                 perror("fopen write iolog");
429                 return 1;
430         }
431
432         /*
433          * That's it for writing, setup a log buffer and we're done.
434           */
435         td->iolog_f = f;
436         td->iolog_buf = malloc(8192);
437         setvbuf(f, td->iolog_buf, _IOFBF, 8192);
438
439         /*
440          * write our version line
441          */
442         if (fprintf(f, "%s\n", iolog_ver2) < 0) {
443                 perror("iolog init\n");
444                 return 1;
445         }
446
447         /*
448          * add all known files
449          */
450         for_each_file(td, ff, i)
451                 log_file(td, ff, FIO_LOG_ADD_FILE);
452
453         return 0;
454 }
455
456 int init_iolog(struct thread_data *td)
457 {
458         int ret = 0;
459
460         if (td->o.read_iolog_file) {
461                 /*
462                  * Check if it's a blktrace file and load that if possible.
463                  * Otherwise assume it's a normal log file and load that.
464                  */
465                 if (is_blktrace(td->o.read_iolog_file))
466                         ret = load_blktrace(td, td->o.read_iolog_file);
467                 else
468                         ret = init_iolog_read(td);
469         } else if (td->o.write_iolog_file)
470                 ret = init_iolog_write(td);
471
472         return ret;
473 }
474
475 void setup_log(struct io_log **log)
476 {
477         struct io_log *l = malloc(sizeof(*l));
478
479         l->nr_samples = 0;
480         l->max_samples = 1024;
481         l->log = malloc(l->max_samples * sizeof(struct io_sample));
482         *log = l;
483 }
484
485 void __finish_log(struct io_log *log, const char *name)
486 {
487         unsigned int i;
488         FILE *f;
489
490         f = fopen(name, "a");
491         if (!f) {
492                 perror("fopen log");
493                 return;
494         }
495
496         for (i = 0; i < log->nr_samples; i++) {
497                 fprintf(f, "%lu, %lu, %u, %u\n", log->log[i].time,
498                                                 log->log[i].val,
499                                                 log->log[i].ddir,
500                                                 log->log[i].bs);
501         }
502
503         fclose(f);
504         free(log->log);
505         free(log);
506 }
507
508 void finish_log_named(struct thread_data *td, struct io_log *log,
509                        const char *prefix, const char *postfix)
510 {
511         char file_name[256], *p;
512
513         snprintf(file_name, 200, "%s_%s.log", prefix, postfix);
514         p = basename(file_name);
515         __finish_log(log, p);
516 }
517
518 void finish_log(struct thread_data *td, struct io_log *log, const char *name)
519 {
520         finish_log_named(td, log, td->o.name, name);
521 }