From ea0630ef550a3ed7bc38d54c8acab6c7ed075aba Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Tue, 26 Mar 2024 21:49:29 -0400
Subject: kernel: Use 'sio_txn' for file I/O

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 sys/kern/kern_filedesc.c | 14 +++++++++++---
 sys/kern/vfs_subr.c      |  4 ++--
 2 files changed, 13 insertions(+), 5 deletions(-)

(limited to 'sys/kern')

diff --git a/sys/kern/kern_filedesc.c b/sys/kern/kern_filedesc.c
index 80ab094..63ffa98 100644
--- a/sys/kern/kern_filedesc.c
+++ b/sys/kern/kern_filedesc.c
@@ -29,6 +29,7 @@
 
 #include <sys/filedesc.h>
 #include <sys/proc.h>
+#include <sys/sio.h>
 #include <sys/sched.h>
 #include <sys/errno.h>
 #include <sys/system.h>
@@ -90,8 +91,9 @@ make_write_buf(struct proc *td, const void *data, char **buf_out, size_t count)
  * Helper function for write()
  */
 static ssize_t
-do_write(struct vnode *vp, const char *buf, size_t count)
+do_write(struct vnode *vp, char *buf, size_t count)
 {
+    struct sio_txn sio = { .buf = buf, .len = count };
     struct vops *vops = vp->vops;
     int status;
 
@@ -103,7 +105,7 @@ do_write(struct vnode *vp, const char *buf, size_t count)
     }
 
     /* Attempt a write */
-    if ((status = vops->write(vp, buf, count)) < 0) {
+    if ((status = vops->write(vp, &sio)) < 0) {
         return status;
     }
 
@@ -313,8 +315,14 @@ read(int fd, void *buf, size_t count)
     ssize_t bytes_read;
     struct vnode *vnode;
     struct filedesc *fd_desc;
+    struct sio_txn sio = {
+        .buf = buf,
+        .len = count,
+        .type = SIO_NONE
+    };
 
     fd_desc = fd_from_fdnum(this_td(), fd);
+    sio.offset = fd_desc->offset;
 
     if (fd_desc == NULL) {
         return -EBADF;
@@ -326,7 +334,7 @@ read(int fd, void *buf, size_t count)
         return -EINVAL;
     }
 
-    bytes_read = vfs_read(vnode, buf, count);
+    bytes_read = vfs_read(vnode, &sio);
     return bytes_read;
 }
 
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c
index 5155c9a..bbaec12 100644
--- a/sys/kern/vfs_subr.c
+++ b/sys/kern/vfs_subr.c
@@ -225,7 +225,7 @@ vfs_vget(struct vnode *parent, const char *name, struct vnode **vp)
 }
 
 ssize_t
-vfs_read(struct vnode *vp, char *buf, size_t count)
+vfs_read(struct vnode *vp, struct sio_txn *sio)
 {
-    return vp->vops->read(vp, buf, count);
+    return vp->vops->read(vp, sio);
 }
-- 
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