linux: add IORING_OP_CLOSE support (#3964)

src/unix/fs.c

@@ -1821,6 +1821,9 @@ int uv_fs_chown(uv_loop_t* loop,
 int uv_fs_close(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
   INIT(CLOSE);
   req->file = file;
+  if (cb != NULL)
+    if (uv__iou_fs_close(loop, req))
+      return 0;
   POST;
 }
 

src/unix/internal.h

@@ -331,6 +331,7 @@ int uv__random_sysctl(void* buf, size_t buflen);
 
 /* io_uring */
 #ifdef __linux__
+int uv__iou_fs_close(uv_loop_t* loop, uv_fs_t* req);
 int uv__iou_fs_fsync_or_fdatasync(uv_loop_t* loop,
                                   uv_fs_t* req,
                                   uint32_t fsync_flags);
@@ -343,6 +344,7 @@ int uv__iou_fs_statx(uv_loop_t* loop,
                      int is_fstat,
                      int is_lstat);
 #else
+#define uv__iou_fs_close(loop, req) 0
 #define uv__iou_fs_fsync_or_fdatasync(loop, req, fsync_flags) 0
 #define uv__iou_fs_open(loop, req) 0
 #define uv__iou_fs_read_or_write(loop, req, is_read) 0

src/unix/linux.c

@@ -147,6 +147,7 @@ enum {
   UV__IORING_OP_WRITEV = 2,
   UV__IORING_OP_FSYNC = 3,
   UV__IORING_OP_OPENAT = 18,
+  UV__IORING_OP_CLOSE = 19,
   UV__IORING_OP_STATX = 21,
 };
 
@@ -650,6 +651,25 @@ static void uv__iou_submit(struct uv__iou* iou) {
 }
 
 
+int uv__iou_fs_close(uv_loop_t* loop, uv_fs_t* req) {
+  struct uv__io_uring_sqe* sqe;
+  struct uv__iou* iou;
+
+  iou = &uv__get_internal_fields(loop)->iou;
+
+  sqe = uv__iou_get_sqe(iou, loop, req);
+  if (sqe == NULL)
+    return 0;
+
+  sqe->fd = req->file;
+  sqe->opcode = UV__IORING_OP_CLOSE;
+
+  uv__iou_submit(iou);
+
+  return 1;
+}
+
+
 int uv__iou_fs_fsync_or_fdatasync(uv_loop_t* loop,
                                   uv_fs_t* req,
                                   uint32_t fsync_flags) {

test/test-threadpool-cancel.c

@@ -94,6 +94,7 @@ static int known_broken(uv_req_t* req) {
 #ifdef __linux__
   /* TODO(bnoordhuis) make cancellation work with io_uring */
   switch (((uv_fs_t*) req)->fs_type) {
+    case UV_FS_CLOSE:
     case UV_FS_FDATASYNC:
     case UV_FS_FSTAT:
     case UV_FS_FSYNC: