first async IO code drop

[fio.git] / engines / glusterfs_sync.c

diff --git a/engines/glusterfs_sync.c b/engines/glusterfs_sync.c
new file mode 100644 (file)
index 0000000..cff6427
--- /dev/null
+++ b/engines/glusterfs_sync.c
@@ -0,0 +1,93 @@
+/*
+ * glusterfs engine
+ *
+ * IO engine using Glusterfs's gfapi sync interface
+ *
+ */
+
+#include "gfapi.h"
+
+#define LAST_POS(f)    ((f)->engine_data)
+static int fio_gf_prep(struct thread_data *td, struct io_u *io_u)
+{
+       struct fio_file *f = io_u->file;
+       struct gf_data *g = td->io_ops->data;
+
+       dprint(FD_FILE, "fio prep\n");
+
+       if (!ddir_rw(io_u->ddir))
+               return 0;
+
+       if (LAST_POS(f) != -1ULL && LAST_POS(f) == io_u->offset)
+               return 0;
+
+       if (glfs_lseek(g->fd, io_u->offset, SEEK_SET) < 0) {
+               td_verror(td, errno, "lseek");
+               return 1;
+       }
+
+       return 0;
+}
+
+static int fio_gf_queue(struct thread_data *td, struct io_u *io_u)
+{
+    struct gf_data *g = td->io_ops->data;
+    int ret = 0;
+
+    dprint(FD_FILE, "fio queue len %lu\n", io_u->xfer_buflen);
+    fio_ro_check(td, io_u);
+
+    if (io_u->ddir == DDIR_READ)
+        ret = glfs_read(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 0);
+    else if (io_u->ddir == DDIR_WRITE)
+        ret = glfs_write(g->fd, io_u->xfer_buf, io_u->xfer_buflen, 0);
+    else {         
+        log_err("unsupported operation.\n");
+        return -EINVAL;
+    }
+    dprint(FD_FILE, "fio len %lu ret %d\n", io_u->xfer_buflen, ret);
+    if (io_u->file && ret >= 0 && ddir_rw(io_u->ddir))
+        LAST_POS(io_u->file) = io_u->offset + ret;
+
+    if (ret != (int) io_u->xfer_buflen) {
+        if (ret >= 0) {
+            io_u->resid = io_u->xfer_buflen - ret;
+            io_u->error = 0;
+            return FIO_Q_COMPLETED;
+        } else
+            io_u->error = errno;
+    }
+
+    if (io_u->error){
+        log_err("IO failed.\n");
+        td_verror(td, io_u->error, "xfer");
+    }
+
+    return FIO_Q_COMPLETED;
+
+}
+
+static struct ioengine_ops ioengine = {
+       .name               = "gfapi",
+       .version            = FIO_IOOPS_VERSION,
+       .init           = fio_gf_setup,
+       .cleanup        = fio_gf_cleanup,
+       .prep               = fio_gf_prep,
+       .queue              = fio_gf_queue,
+       .open_file          = fio_gf_open_file,
+       .close_file         = fio_gf_close_file,
+       .get_file_size  = fio_gf_get_file_size,
+       .options        = gfapi_options,
+       .option_struct_size = sizeof(struct gf_options),
+       .flags              = FIO_SYNCIO | FIO_DISKLESSIO,
+};
+
+static void fio_init fio_gf_register(void)
+{
+    register_ioengine(&ioengine);
+}
+
+static void fio_exit fio_gf_unregister(void)
+{
+    unregister_ioengine(&ioengine);
+}