don't fallocate on block devices

vmware · May 15, 2024 · a1873ab · a1873ab
1 parent d5ae0ec
commit a1873ab
Showing 1 changed file with 10 additions and 3 deletions.
diff --git a/src/platform_linux/laio.c b/src/platform_linux/laio.c
@@ -186,9 +186,16 @@ io_handle_init(laio_handle *io, io_config *cfg, platform_heap_id hid)
       return CONST_STATUS(errno);
    }
 
-   if (is_create) {
-      int rc = fallocate(io->fd, 0, 0, 128 * 1024);
-      if (rc) {
+   struct stat statbuf;
+   int         r = fstat(io->fd, &statbuf);
+   if (r) {
+      platform_error_log("fstat failed: %s\n", strerror(errno));
+      return STATUS_IO_ERROR;
+   }
+
+   if (S_ISREG(statbuf.st_mode) && statbuf.st_size < 128 * 1024) {
+      r = fallocate(io->fd, 0, 0, 128 * 1024);
+      if (r) {
          platform_error_log("fallocate failed: %s\n", strerror(errno));
          return STATUS_IO_ERROR;
       }