Move conditional lib files to oslib/

[fio.git] / oslib / linux-dev-lookup.c

diff --git a/oslib/linux-dev-lookup.c b/oslib/linux-dev-lookup.c
new file mode 100644 (file)
index 0000000..4d5f356
--- /dev/null
+++ b/oslib/linux-dev-lookup.c
@@ -0,0 +1,66 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "../os/os.h"
+
+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%s", path, FIO_OS_PATH_SEPARATOR, 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;
+}