Add indirect blocks

CMakeLists.txt

@@ -26,7 +26,7 @@ if (TESTS)
 endif()
 
 if (DEBUG)
-    add_compile_options($<$<C_COMPILER_ID:Clang>:-ggdb>)
+    set(CMAKE_BUILD_TYPE Debug)
 endif()
 
 if (SANITIZER)

src/device.c

@@ -68,13 +68,13 @@ ex_status ex_device_read_to_buffer(ssize_t *readed, char *buffer, size_t off,
         goto failure;
     }
 
-    off_t offset = lseek(fd, off, SEEK_SET);
-
     if ((off_t)off < 0) {
         status = INVALID_OFFSET;
         goto failure;
     }
 
+    off_t offset = lseek(fd, off, SEEK_SET);
+
     if ((size_t)offset != off) {
         status = OFFSET_SEEK_FAILED;
         goto failure;
@@ -97,7 +97,7 @@ ex_status ex_device_read_to_buffer(ssize_t *readed, char *buffer, size_t off,
         error("device is not opened");
         break;
     case INVALID_OFFSET:
-        error("lseek: underthrow (off > max(int))");
+        error("lseek: underthrow (off > max(int)) (%li, %zu)", off, off);
         break;
     case OFFSET_SEEK_FAILED:
         error("lseek: offset=%li, wanted=%lu", offset, off);
@@ -122,13 +122,13 @@ ex_status ex_device_write(size_t off, const char *data, size_t amount) {
         goto failure;
     }
 
-    off_t offset = lseek(fd, off, SEEK_SET);
-
     if ((off_t)off < 0) {
         status = INVALID_OFFSET;
         goto failure;
     }
 
+    off_t offset = lseek(fd, off, SEEK_SET);
+
     if ((size_t)offset != off) {
         status = OFFSET_SEEK_FAILED;
         goto failure;

src/errors.h

@@ -33,6 +33,7 @@ typedef enum {
     INODE_LOAD_FAILED,
     INODE_IS_NOT_UNLINKABLE,
     INODE_NOT_FOUND,
+    PARENT_BLOCK_CANNOT_BE_READED,
     OK
 } ex_status;
 

src/ex.c

@@ -121,6 +121,8 @@ int ex_getattr(const char *pathname, struct stat *st) {
 
     st->st_nlink = inode->nlinks;
     st->st_size = inode->size;
+    st->st_blocks = inode->nblocks;
+    st->st_blksize = EX_BLOCK_SIZE;
     st->st_mode = inode->mode;
     st->st_ino = inode->number;