Document loading external io engines

[fio.git] / io_u.c

diff --git a/io_u.c b/io_u.c
index 6fb754e7f44701cbfddc628abe4f7164eeccd1aa..ede61a8eae32dfcd34bc5b9022b99f2b05eaad3b 100644 (file)
--- a/io_u.c
+++ b/io_u.c
@@ -15,7 +15,6 @@
 
 struct io_completion_data {
        int nr;                         /* input */
-       endio_handler *handler;         /* input */
 
        int error;                      /* output */
        unsigned long bytes_done[2];    /* output */
@@ -106,7 +105,7 @@ static int get_next_offset(struct thread_data *td, struct fio_file *f,
        unsigned long long b, rb;
        long r;
 
-       if (!td->sequential) {
+       if (td_random(td)) {
                unsigned long long max_blocks = f->file_size / td->min_bs[ddir];
                int loops = 5;
 
@@ -212,6 +211,9 @@ void requeue_io_u(struct thread_data *td, struct io_u **io_u)
 {
        struct io_u *__io_u = *io_u;
 
+       __io_u->flags |= IO_U_F_FREE;
+       __io_u->flags &= ~IO_U_F_FLIGHT;
+
        list_del(&__io_u->list);
        list_add_tail(&__io_u->list, &td->io_u_requeues);
        td->cur_depth--;
@@ -253,7 +255,7 @@ static int fill_io_u(struct thread_data *td, struct fio_file *f,
        /*
         * mark entry before potentially trimming io_u
         */
-       if (!td->read_iolog && !td->sequential && !td->norandommap)
+       if (!td->read_iolog && td_random(td) && !td->norandommap)
                mark_random_map(td, f, io_u);
 
        /*
@@ -378,6 +380,7 @@ struct io_u *__get_io_u(struct thread_data *td)
                io_u->buflen = 0;
                io_u->resid = 0;
                io_u->file = NULL;
+               io_u->end_io = NULL;
        }
 
        if (io_u) {
@@ -510,8 +513,8 @@ static void io_completed(struct thread_data *td, struct io_u *io_u,
 
                icd->bytes_done[idx] += bytes;
 
-               if (icd->handler) {
-                       ret = icd->handler(io_u);
+               if (io_u->end_io) {
+                       ret = io_u->end_io(io_u);
                        if (ret && !icd->error)
                                icd->error = ret;
                }
@@ -519,12 +522,10 @@ static void io_completed(struct thread_data *td, struct io_u *io_u,
                icd->error = io_u->error;
 }
 
-static void init_icd(struct io_completion_data *icd, endio_handler *handler,
-                    int nr)
+static void init_icd(struct io_completion_data *icd, int nr)
 {
        fio_gettime(&icd->time, NULL);
 
-       icd->handler = handler;
        icd->nr = nr;
 
        icd->error = 0;
@@ -548,12 +549,11 @@ static void ios_completed(struct thread_data *td,
 /*
  * Complete a single io_u for the sync engines.
  */
-long io_u_sync_complete(struct thread_data *td, struct io_u *io_u,
-                       endio_handler *handler)
+long io_u_sync_complete(struct thread_data *td, struct io_u *io_u)
 {
        struct io_completion_data icd;
 
-       init_icd(&icd, handler, 1);
+       init_icd(&icd, 1);
        io_completed(td, io_u, &icd);
        put_io_u(td, io_u);
 
@@ -566,21 +566,13 @@ long io_u_sync_complete(struct thread_data *td, struct io_u *io_u,
 /*
  * Called to complete min_events number of io for the async engines.
  */
-long io_u_queued_complete(struct thread_data *td, int min_events,
-                         endio_handler *handler)
-
+long io_u_queued_complete(struct thread_data *td, int min_events)
 {
        struct io_completion_data icd;
        struct timespec *tvp = NULL;
        int ret;
 
-       if (min_events > 0) {
-               ret = td_io_commit(td);
-               if (ret < 0) {
-                       td_verror(td, -ret, "td_io_commit");
-                       return ret;
-               }
-       } else {
+       if (!min_events) {
                struct timespec ts = { .tv_sec = 0, .tv_nsec = 0, };
 
                tvp = &ts;
@@ -593,7 +585,7 @@ long io_u_queued_complete(struct thread_data *td, int min_events,
        } else if (!ret)
                return ret;
 
-       init_icd(&icd, handler, ret);
+       init_icd(&icd, ret);
        ios_completed(td, &icd);
        if (!icd.error)
                return icd.bytes_done[0] + icd.bytes_done[1];