Io uring: Difference between revisions

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 The details of ring structure are typically only relevant when using the low-level API. Two offset structs are used to prepare and control the three (or two, see <tt>IORING_FEAT_SINGLE_MMAP</tt>) backing memory maps.
 <syntaxhighlight lang="c">
+struct io_uring_sq {
+  unsigned *khead;
+  unsigned *ktail;
+  // Deprecated: use `ring_mask` instead of `*kring_mask`
+  unsigned *kring_mask;
+  // Deprecated: use `ring_entries` instead of `*kring_entries`
+  unsigned *kring_entries;
+  unsigned *kflags;
+  unsigned *kdropped;
+  unsigned *array;
+  struct io_uring_sqe *sqes;
+  unsigned sqe_head;
+  unsigned sqe_tail;
+  size_t ring_sz;
+  void *ring_ptr;
+  unsigned ring_mask;
+  unsigned ring_entries;
+  unsigned pad[2];
+};
+struct io_uring_cq {
+  unsigned *khead;
+  unsigned *ktail;
+  // Deprecated: use `ring_mask` instead of `*kring_mask`
+  unsigned *kring_mask;
+  // Deprecated: use `ring_entries` instead of `*kring_entries`
+  unsigned *kring_entries;
+  unsigned *kflags;
+  unsigned *koverflow;
+  struct io_uring_cqe *cqes;
+  size_t ring_sz;
+  void *ring_ptr;
+  unsigned ring_mask;
+  unsigned ring_entries;
+  unsigned pad[2];
+};
 struct io_sqring_offsets {
      __u32 head;