Rework qemu_proxy into a C wrapper library with public header

2021-06-19 00:39:11 +03:00
parent 3de553ecd7
commit 511a89948b
9 changed files with 434 additions and 351 deletions
@@ -0,0 +1,54 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 or GNU GPL-2.0+ (see README.md for details)
+
+// Simplified C client library for QEMU, fio and other external drivers
+
+#ifndef VITASTOR_QEMU_PROXY_H
+#define VITASTOR_QEMU_PROXY_H
+
+#ifndef POOL_ID_BITS
+#define POOL_ID_BITS 16
+#endif
+#include <stdint.h>
+#include <sys/uio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct vitastor_c;
+typedef struct vitastor_c vitastor_c;
+
+typedef void VitastorIOHandler(long retval, void *opaque);
+
+// QEMU
+typedef void IOHandler(void *opaque);
+typedef void QEMUSetFDHandler(void *ctx, int fd, int is_external, IOHandler *fd_read, IOHandler *fd_write, void *poll_fn, void *opaque);
+
+vitastor_c *vitastor_c_create_qemu(QEMUSetFDHandler *aio_set_fd_handler, void *aio_context,
+    const char *config_path, const char *etcd_host, const char *etcd_prefix,
+    bool use_rdma, const char *rdma_device, int rdma_port_num, int rdma_gid_index, int rdma_mtu, int log_level);
+vitastor_c *vitastor_c_create_uring(const char *config_path, const char *etcd_host, const char *etcd_prefix,
+    int use_rdma, const char *rdma_device, int rdma_port_num, int rdma_gid_index, int rdma_mtu, int log_level);
+vitastor_c *vitastor_c_create_uring_json(const char **options, int options_len);
+void vitastor_c_destroy(vitastor_c *client);
+int vitastor_c_is_ready(vitastor_c *client);
+void vitastor_c_uring_wait_ready(vitastor_c *client);
+void vitastor_c_uring_handle_events(vitastor_c *client);
+void vitastor_c_uring_wait_events(vitastor_c *client);
+void vitastor_c_read(vitastor_c *client, uint64_t inode, uint64_t offset, uint64_t len,
+    struct iovec *iov, int iovcnt, VitastorIOHandler cb, void *opaque);
+void vitastor_c_write(vitastor_c *client, uint64_t inode, uint64_t offset, uint64_t len,
+    struct iovec *iov, int iovcnt, VitastorIOHandler cb, void *opaque);
+void vitastor_c_sync(vitastor_c *client, VitastorIOHandler cb, void *opaque);
+void vitastor_c_watch_inode(vitastor_c *client, char *image, VitastorIOHandler cb, void *opaque);
+void vitastor_c_close_watch(vitastor_c *client, void *handle);
+uint64_t vitastor_c_inode_get_size(void *handle);
+uint64_t vitastor_c_inode_get_num(void *handle);
+int vitastor_c_inode_get_readonly(void *handle);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif