2 * This file contains format parsing code for blkparse, allowing you to
3 * customize the individual action format and generel output format.
13 #define VALID_SPECS "ABCDFGMPQRSTUWX"
15 #define HEADER "%D %2c %8s %5T.%9t %5p %2a %3d "
17 static char *override_format[256];
19 static inline int valid_spec(int spec)
21 return strchr(VALID_SPECS, spec) != NULL;
24 void set_all_format_specs(char *option)
28 for (p = VALID_SPECS; *p; p++)
29 if (override_format[(int)(*p)] == NULL)
30 override_format[(int)(*p)] = strdup(option);
33 int add_format_spec(char *option)
37 if (!valid_spec(spec)) {
38 fprintf(stderr,"Bad format specifier %c\n", spec);
41 if (optarg[1] != ',') {
42 fprintf(stderr,"Bad format specifier - need ',' %s\n", option);
46 if (*option == '\0') {
47 fprintf(stderr,"Bad format specifier - need fmt %s\n", option);
52 * Set both merges (front and back)
55 override_format['B'] = strdup(option);
56 override_format['M'] = strdup(option);
58 override_format[spec] = strdup(option);
63 static inline void fill_rwbs(char *rwbs, struct blk_io_trace *t)
65 int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
66 int b = t->action & BLK_TC_ACT(BLK_TC_BARRIER);
67 int s = t->action & BLK_TC_ACT(BLK_TC_SYNC);
82 static inline int pdu_rest_is_zero(unsigned char *pdu, int len)
84 static char zero[4096];
86 return !memcmp(pdu, zero, len);
89 static char *dump_pdu(unsigned char *pdu_buf, int pdu_len)
94 if (!pdu_buf || !pdu_len)
97 for (len = 0, i = 0; i < pdu_len; i++) {
99 len += sprintf(p + len, " ");
101 len += sprintf(p + len, "%02x", pdu_buf[i]);
104 * usually dump for cdb dumps where we can see lots of
105 * zeroes, stop when the rest is just zeroes and indicate
106 * so with a .. appended
108 if (!pdu_buf[i] && pdu_rest_is_zero(pdu_buf + i, pdu_len - i)) {
109 sprintf(p + len, " ..");
117 #define pdu_start(t) (((void *) (t) + sizeof(struct blk_io_trace)))
119 static unsigned int get_pdu_int(struct blk_io_trace *t)
121 __u64 *val = pdu_start(t);
123 return be64_to_cpu(*val);
126 static void get_pdu_remap(struct blk_io_trace *t, struct blk_io_trace_remap *r)
128 struct blk_io_trace_remap *__r = pdu_start(t);
129 __u64 sector = __r->sector;
131 r->device = be32_to_cpu(__r->device);
132 r->sector = be64_to_cpu(sector);
135 static void print_field(char *act, struct per_cpu_info *pci,
136 struct blk_io_trace *t, unsigned long long elapsed,
137 int pdu_len, unsigned char *pdu_buf, char field,
138 int minus, int has_w, int width)
144 sprintf(format, "%%-%d", width);
146 sprintf(format, "%%%d", width);
148 sprintf(format, "%%");
152 fprintf(ofp, strcat(format, "s"), act);
155 fprintf(ofp, strcat(format, "d"), pci->cpu);
158 fprintf(ofp, strcat(format, "s"), t->comm);
164 fprintf(ofp, strcat(format, "s"), rwbs);
167 case 'D': /* format width ignored */
168 fprintf(ofp,"%3d,%-3d", MAJOR(t->device), MINOR(t->device));
171 fprintf(ofp, strcat(format, "d"), t->error);
174 fprintf(ofp, strcat(format, "d"), MAJOR(t->device));
177 fprintf(ofp, strcat(format, "d"), MINOR(t->device));
180 fprintf(ofp, strcat(format, "u"), t_sec(t));
183 fprintf(ofp, strcat(format, "u"), t->bytes);
186 fprintf(ofp, strcat(format, "u"), t->pid);
188 case 'P': { /* format width ignored */
189 char *p = dump_pdu(pdu_buf, pdu_len);
191 fprintf(ofp, "%s", p);
195 fprintf(ofp, strcat(format, "ld"), t->sequence);
198 fprintf(ofp, strcat(format, "lu"), t->sector);
201 sprintf(format, "%%0%dlu", has_w ? width : 9);
202 fprintf(ofp, format, NANO_SECONDS(t->time));
205 fprintf(ofp, strcat(format, "d"), SECONDS(t->time));
208 if (elapsed == -1ULL) {
209 fprintf(stderr, "Expecting elapsed value\n");
212 fprintf(ofp, strcat(format, "llu"), elapsed / 1000);
215 fprintf(ofp, strcat(format, "u"), get_pdu_int(t));
219 fprintf(ofp,strcat(format, "c"), field);
224 static char *parse_field(char *act, struct per_cpu_info *pci,
225 struct blk_io_trace *t, unsigned long long elapsed,
226 int pdu_len, unsigned char *pdu_buf,
232 char *p = master_format;
241 width = (width * 10) + (*p++ - '0');
242 } while ((*p) && (isdigit(*p)));
245 print_field(act, pci, t, elapsed, pdu_len, pdu_buf, *p++,
246 minus, has_w, width);
251 static void process_default(char *act, struct per_cpu_info *pci,
252 struct blk_io_trace *t, unsigned long long elapsed,
253 int pdu_len, unsigned char *pdu_buf)
260 * The header is always the same
262 fprintf(ofp, "%3d,%-3d %2d %8d %5d.%09lu %5u %2s %3s ",
263 MAJOR(t->device), MINOR(t->device), pci->cpu, t->sequence,
264 (int) SECONDS(t->time), (unsigned long) NANO_SECONDS(t->time),
268 case 'R': /* Requeue */
269 case 'C': /* Complete */
270 if (t->action & BLK_TC_ACT(BLK_TC_PC)) {
271 char *p = dump_pdu(pdu_buf, pdu_len);
273 fprintf(ofp, "(%s) ", p);
274 fprintf(ofp, "[%d]\n", t->error);
276 if (elapsed != -1ULL) {
277 fprintf(ofp, "%llu + %u (%8llu) [%d]\n",
278 (unsigned long long) t->sector,
279 t_sec(t), elapsed, t->error);
281 fprintf(ofp, "%llu + %u [%d]\n",
282 (unsigned long long) t->sector,
288 case 'D': /* Issue */
289 case 'I': /* Insert */
290 case 'Q': /* Queue */
291 case 'W': /* Bounce */
292 if (t->action & BLK_TC_ACT(BLK_TC_PC)) {
294 fprintf(ofp, "%u ", t->bytes);
295 p = dump_pdu(pdu_buf, pdu_len);
297 fprintf(ofp, "(%s) ", p);
298 fprintf(ofp, "[%s]\n", t->comm);
300 if (elapsed != -1ULL) {
301 fprintf(ofp, "%llu + %u (%8llu) [%s]\n",
302 (unsigned long long) t->sector,
303 t_sec(t), elapsed, t->comm);
305 fprintf(ofp, "%llu + %u [%s]\n",
306 (unsigned long long) t->sector,
312 case 'B': /* Back merge */
313 case 'F': /* Front merge */
314 case 'M': /* Front or back merge */
315 case 'G': /* Get request */
316 case 'S': /* Sleep request */
317 fprintf(ofp, "%llu + %u [%s]\n", (unsigned long long) t->sector,
322 fprintf(ofp, "[%s]\n", t->comm);
325 case 'U': /* Unplug IO */
326 case 'T': /* Unplug timer */
327 fprintf(ofp, "[%s] %u\n", t->comm, get_pdu_int(t));
330 case 'A': { /* remap */
331 struct blk_io_trace_remap r;
333 get_pdu_remap(t, &r);
334 fprintf(ofp, "%llu + %u <- (%d,%d) %llu\n",
335 (unsigned long long) r.sector, t_sec(t),
336 MAJOR(r.device), MINOR(r.device),
337 (unsigned long long) t->sector);
341 case 'X': /* Split */
342 fprintf(ofp, "%llu / %u [%s]\n", (unsigned long long) t->sector,
343 get_pdu_int(t), t->comm);
347 fprintf(stderr, "Unknown action %c\n", act[0]);
353 void process_fmt(char *act, struct per_cpu_info *pci, struct blk_io_trace *t,
354 unsigned long long elapsed, int pdu_len,
355 unsigned char *pdu_buf)
357 char *p = override_format[(int) *act];
360 process_default(act, pci, t, elapsed, pdu_len, pdu_buf);
366 case '%': /* Field specifier */
369 fprintf(ofp, "%c", *p++);
371 fprintf(ofp, "%c", '%');
373 p = parse_field(act, pci, t, elapsed,
374 pdu_len, pdu_buf, p);
376 case '\\': { /* escape */
378 case 'b': fprintf(ofp, "\b"); break;
379 case 'n': fprintf(ofp, "\n"); break;
380 case 'r': fprintf(ofp, "\r"); break;
381 case 't': fprintf(ofp, "\t"); break;
384 "Invalid escape char in format %c\n",
393 fprintf(ofp, "%c", *p++);