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 char *name = find_process_name(t->pid);
160 fprintf(ofp, strcat(format, "s"), name);
167 fprintf(ofp, strcat(format, "s"), rwbs);
170 case 'D': /* format width ignored */
171 fprintf(ofp,"%3d,%-3d", MAJOR(t->device), MINOR(t->device));
174 fprintf(ofp, strcat(format, "d"), t->error);
177 fprintf(ofp, strcat(format, "d"), MAJOR(t->device));
180 fprintf(ofp, strcat(format, "d"), MINOR(t->device));
183 fprintf(ofp, strcat(format, "u"), t_sec(t));
186 fprintf(ofp, strcat(format, "u"), t->bytes);
189 fprintf(ofp, strcat(format, "u"), t->pid);
191 case 'P': { /* format width ignored */
192 char *p = dump_pdu(pdu_buf, pdu_len);
194 fprintf(ofp, "%s", p);
198 fprintf(ofp, strcat(format, "ld"), t->sequence);
201 fprintf(ofp, strcat(format, "lu"), t->sector);
204 sprintf(format, "%%0%dlu", has_w ? width : 9);
205 fprintf(ofp, format, NANO_SECONDS(t->time));
208 fprintf(ofp, strcat(format, "d"), SECONDS(t->time));
211 if (elapsed == -1ULL) {
212 fprintf(stderr, "Expecting elapsed value\n");
215 fprintf(ofp, strcat(format, "llu"), elapsed / 1000);
218 fprintf(ofp, strcat(format, "u"), get_pdu_int(t));
222 fprintf(ofp,strcat(format, "c"), field);
227 static char *parse_field(char *act, struct per_cpu_info *pci,
228 struct blk_io_trace *t, unsigned long long elapsed,
229 int pdu_len, unsigned char *pdu_buf,
235 char *p = master_format;
244 width = (width * 10) + (*p++ - '0');
245 } while ((*p) && (isdigit(*p)));
248 print_field(act, pci, t, elapsed, pdu_len, pdu_buf, *p++,
249 minus, has_w, width);
254 static void process_default(char *act, struct per_cpu_info *pci,
255 struct blk_io_trace *t, unsigned long long elapsed,
256 int pdu_len, unsigned char *pdu_buf)
264 * The header is always the same
266 fprintf(ofp, "%3d,%-3d %2d %8d %5d.%09lu %5u %2s %3s ",
267 MAJOR(t->device), MINOR(t->device), pci->cpu, t->sequence,
268 (int) SECONDS(t->time), (unsigned long) NANO_SECONDS(t->time),
271 name = find_process_name(t->pid);
274 case 'R': /* Requeue */
275 case 'C': /* Complete */
276 if (t->action & BLK_TC_ACT(BLK_TC_PC)) {
277 char *p = dump_pdu(pdu_buf, pdu_len);
279 fprintf(ofp, "(%s) ", p);
280 fprintf(ofp, "[%d]\n", t->error);
282 if (elapsed != -1ULL) {
283 fprintf(ofp, "%llu + %u (%8llu) [%d]\n",
284 (unsigned long long) t->sector,
285 t_sec(t), elapsed, t->error);
287 fprintf(ofp, "%llu + %u [%d]\n",
288 (unsigned long long) t->sector,
294 case 'D': /* Issue */
295 case 'I': /* Insert */
296 case 'Q': /* Queue */
297 case 'W': /* Bounce */
298 if (t->action & BLK_TC_ACT(BLK_TC_PC)) {
300 fprintf(ofp, "%u ", t->bytes);
301 p = dump_pdu(pdu_buf, pdu_len);
303 fprintf(ofp, "(%s) ", p);
304 fprintf(ofp, "[%s]\n", name);
306 if (elapsed != -1ULL) {
307 fprintf(ofp, "%llu + %u (%8llu) [%s]\n",
308 (unsigned long long) t->sector,
309 t_sec(t), elapsed, name);
311 fprintf(ofp, "%llu + %u [%s]\n",
312 (unsigned long long) t->sector,
318 case 'B': /* Back merge */
319 case 'F': /* Front merge */
320 case 'M': /* Front or back merge */
321 case 'G': /* Get request */
322 case 'S': /* Sleep request */
323 fprintf(ofp, "%llu + %u [%s]\n", (unsigned long long) t->sector,
328 fprintf(ofp, "[%s]\n", name);
331 case 'U': /* Unplug IO */
332 case 'T': /* Unplug timer */
333 fprintf(ofp, "[%s] %u\n", name, get_pdu_int(t));
336 case 'A': { /* remap */
337 struct blk_io_trace_remap r;
339 get_pdu_remap(t, &r);
340 fprintf(ofp, "%llu + %u <- (%d,%d) %llu\n",
341 (unsigned long long) r.sector, t_sec(t),
342 MAJOR(r.device), MINOR(r.device),
343 (unsigned long long) t->sector);
347 case 'X': /* Split */
348 fprintf(ofp, "%llu / %u [%s]\n", (unsigned long long) t->sector,
349 get_pdu_int(t), name);
353 fprintf(stderr, "Unknown action %c\n", act[0]);
359 void process_fmt(char *act, struct per_cpu_info *pci, struct blk_io_trace *t,
360 unsigned long long elapsed, int pdu_len,
361 unsigned char *pdu_buf)
363 char *p = override_format[(int) *act];
366 process_default(act, pci, t, elapsed, pdu_len, pdu_buf);
372 case '%': /* Field specifier */
375 fprintf(ofp, "%c", *p++);
377 fprintf(ofp, "%c", '%');
379 p = parse_field(act, pci, t, elapsed,
380 pdu_len, pdu_buf, p);
382 case '\\': { /* escape */
384 case 'b': fprintf(ofp, "\b"); break;
385 case 'n': fprintf(ofp, "\n"); break;
386 case 'r': fprintf(ofp, "\r"); break;
387 case 't': fprintf(ofp, "\t"); break;
390 "Invalid escape char in format %c\n",
399 fprintf(ofp, "%c", *p++);