Update io_uring_prep_fallocate() to use 64-bit length/offset

For 64-bit builds this was already the case, and for 32-bit builds with

-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64

enabled. You could argue that without setting those you cannot work with
big files anyway, which is true, but it's somewhat inconvenient for
non C style languages.

Just make them 64-bit by default, we're already passing in 64-bits for
the kernel side anyway in the SQE.

Link: https://github.com/tokio-rs/io-uring/pull/127
Signed-off-by: Jens Axboe <axboe@kernel.dk>

man/io_uring_prep_fallocate.3

diff --git a/man/io_uring_prep_fallocate.3 b/man/io_uring_prep_fallocate.3
index 86e1d39..426e1d5 100644
--- a/man/io_uring_prep_fallocate.3
+++ b/man/io_uring_prep_fallocate.3
@@ -13,8 +13,8 @@
 .BI "void io_uring_prep_fallocate(struct io_uring_sqe *" sqe ","
 .BI "                             int " fd ","
 .BI "                             int " mode ","
-.BI "                             off_t " offset ","
-.BI "                             off_t " len ");"
+.BI "                             __u64 " offset ","
+.BI "                             __u64 " len ");"
 .fi
 .SH DESCRIPTION
 .PP

src/include/liburing.h

diff --git a/src/include/liburing.h b/src/include/liburing.h
index 5b05e36..af143d0 100644
--- a/src/include/liburing.h
+++ b/src/include/liburing.h
@@ -671,7 +671,7 @@
 }
 
 IOURINGINLINE void io_uring_prep_fallocate(struct io_uring_sqe *sqe, int fd,
-					   int mode, off_t offset, off_t len)
+					   int mode, __u64 offset, __u64 len)
 {
 	io_uring_prep_rw(IORING_OP_FALLOCATE, sqe, fd,
 			0, (unsigned int) mode, (__u64) offset);