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tools/io_uring/io_uring-cp: sync with liburing example 

This example is missing a few fixes that are in the liburing version,
synchronize with the upstream version.

Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-08-13 08:57:07 -06:00
parent 43597aac1f
commit 8f40d03707
1 changed files with 27 additions and 4 deletions
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31
tools/io_uring/io_uring-cp.c
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@ -131,8 +131,7 @@ static int copy_file(struct io_uring *ring, off_t insize)
writes = reads = offset = 0;
while (insize || write_left) {
unsigned long had_reads;
int got_comp;
int had_reads, got_comp;
/*
* Queue up as many reads as we can
@ -174,8 +173,13 @@ static int copy_file(struct io_uring *ring, off_t insize)
if (!got_comp) {
ret = io_uring_wait_cqe(ring, &cqe);
got_comp = 1;
} else
} else {
ret = io_uring_peek_cqe(ring, &cqe);
if (ret == -EAGAIN) {
cqe = NULL;
ret = 0;
}
}
if (ret < 0) {
fprintf(stderr, "io_uring_peek_cqe: %s\n",
strerror(-ret));
@ -194,7 +198,7 @@ static int copy_file(struct io_uring *ring, off_t insize)
fprintf(stderr, "cqe failed: %s\n",
strerror(-cqe->res));
return 1;
} else if ((size_t) cqe->res != data->iov.iov_len) {
} else if (cqe->res != data->iov.iov_len) {
/* Short read/write, adjust and requeue */
data->iov.iov_base += cqe->res;
data->iov.iov_len -= cqe->res;
@ -221,6 +225,25 @@ static int copy_file(struct io_uring *ring, off_t insize)
}
}
/* wait out pending writes */
while (writes) {
struct io_data *data;
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "wait_cqe=%d\n", ret);
return 1;
}
if (cqe->res < 0) {
fprintf(stderr, "write res=%d\n", cqe->res);
return 1;
}
data = io_uring_cqe_get_data(cqe);
free(data);
writes--;
io_uring_cqe_seen(ring, cqe);
}
return 0;
}