int blktrace_lookup_device(const char *redirect, char *path, unsigned int maj,
unsigned int min)
{
struct dirent *dir;
struct stat st;
int found = 0;
DIR *D;
D = opendir(path);
if (!D)
return 0;
while ((dir = readdir(D)) != NULL) {
char full_path[256];
if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
continue;
sprintf(full_path, "%s/%s", path, dir->d_name);
if (lstat(full_path, &st) == -1) {
perror("lstat");
break;
}
if (S_ISDIR(st.st_mode)) {
found = blktrace_lookup_device(redirect, full_path,
maj, min);
if (found) {
strcpy(path, full_path);
break;
}
}
if (!S_ISBLK(st.st_mode))
continue;
/*
* If replay_redirect is set then always return this device
* upon lookup which overrides the device lookup based on
* major minor in the actual blktrace
*/
if (redirect) {
strcpy(path, redirect);
found = 1;
break;
}
if (maj == major(st.st_rdev) && min == minor(st.st_rdev)) {
strcpy(path, full_path);
found = 1;
break;
}
}
closedir(D);
return found;
}
static int trace_add_file(struct thread_data *td, __u32 device)
{
static unsigned int last_maj, last_min, last_fileno;
unsigned int maj = FMAJOR(device);
unsigned int min = FMINOR(device);
struct fio_file *f;
char dev[256];
unsigned int i;
if (last_maj == maj && last_min == min)
return last_fileno;
last_maj = maj;
last_min = min;
/*
* check for this file in our list
*/
for_each_file(td, f, i)
if (f->major == maj && f->minor == min) {
last_fileno = f->fileno;
return last_fileno;
}
strcpy(dev, "/dev");
if (blktrace_lookup_device(td->o.replay_redirect, dev, maj, min)) {
int fileno;
if (td->o.replay_redirect)
dprint(FD_BLKTRACE, "device lookup: %d/%d\n overridden"
" with: %s\n", maj, min,
td->o.replay_redirect);
else
dprint(FD_BLKTRACE, "device lookup: %d/%d\n", maj, min);
dprint(FD_BLKTRACE, "add devices %s\n", dev);
fileno = add_file_exclusive(td, dev);
td->o.open_files++;
td->files[fileno]->major = maj;
td->files[fileno]->minor = min;
trace_add_open_close_event(td, fileno, FIO_LOG_OPEN_FILE);
last_fileno = fileno;
}
return last_fileno;
}
