Extending FreeBSD UIO Struct

In FreeBSD the struct uio was just a typedef to uio_t. In order to
extend this struct, outside of the definition for the struct uio, the
struct uio has been embedded inside of a uio_t struct.

Also renamed all the uio_* interfaces to be zfs_uio_* to make it clear
this is a ZFS interface.

Reviewed-by: Ryan Moeller <[email protected]>
Reviewed-by: Jorgen Lundman <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Brian Atkinson <[email protected]>
Closes #11438 

1 files changed, 22 insertions, 21 deletions

diff --git a/module/os/linux/zfs/zfs_uio.c b/module/os/linux/zfs/zfs_uio.c
index e435e1a9f..a31d2d7e1 100644
--- a/module/os/linux/zfs/zfs_uio.c
+++ b/module/os/linux/zfs/zfs_uio.c
@@ -55,7 +55,7 @@
  * a non-zero errno on failure.
  */
 static int
-uiomove_iov(void *p, size_t n, enum uio_rw rw, struct uio *uio)
+zfs_uiomove_iov(void *p, size_t n, zfs_uio_rw_t rw, zfs_uio_t *uio)
 {
 	const struct iovec *iov = uio->uio_iov;
 	size_t skip = uio->uio_skip;
@@ -126,7 +126,7 @@ uiomove_iov(void *p, size_t n, enum uio_rw rw, struct uio *uio)
 }
 
 static int
-uiomove_bvec(void *p, size_t n, enum uio_rw rw, struct uio *uio)
+zfs_uiomove_bvec(void *p, size_t n, zfs_uio_rw_t rw, zfs_uio_t *uio)
 {
 	const struct bio_vec *bv = uio->uio_bvec;
 	size_t skip = uio->uio_skip;
@@ -160,7 +160,7 @@ uiomove_bvec(void *p, size_t n, enum uio_rw rw, struct uio *uio)
 
 #if defined(HAVE_VFS_IOV_ITER)
 static int
-uiomove_iter(void *p, size_t n, enum uio_rw rw, struct uio *uio,
+zfs_uiomove_iter(void *p, size_t n, zfs_uio_rw_t rw, zfs_uio_t *uio,
     boolean_t revert)
 {
 	size_t cnt = MIN(n, uio->uio_resid);
@@ -182,7 +182,7 @@ uiomove_iter(void *p, size_t n, enum uio_rw rw, struct uio *uio,
 		return (EFAULT);
 
 	/*
-	 * Revert advancing the uio_iter.  This is set by uiocopy()
+	 * Revert advancing the uio_iter.  This is set by zfs_uiocopy()
 	 * to avoid consuming the uio and its iov_iter structure.
 	 */
 	if (revert)
@@ -196,21 +196,21 @@ uiomove_iter(void *p, size_t n, enum uio_rw rw, struct uio *uio,
 #endif
 
 int
-uiomove(void *p, size_t n, enum uio_rw rw, struct uio *uio)
+zfs_uiomove(void *p, size_t n, zfs_uio_rw_t rw, zfs_uio_t *uio)
 {
 	if (uio->uio_segflg == UIO_BVEC)
-		return (uiomove_bvec(p, n, rw, uio));
+		return (zfs_uiomove_bvec(p, n, rw, uio));
 #if defined(HAVE_VFS_IOV_ITER)
 	else if (uio->uio_segflg == UIO_ITER)
-		return (uiomove_iter(p, n, rw, uio, B_FALSE));
+		return (zfs_uiomove_iter(p, n, rw, uio, B_FALSE));
 #endif
 	else
-		return (uiomove_iov(p, n, rw, uio));
+		return (zfs_uiomove_iov(p, n, rw, uio));
 }
-EXPORT_SYMBOL(uiomove);
+EXPORT_SYMBOL(zfs_uiomove);
 
 int
-uio_prefaultpages(ssize_t n, struct uio *uio)
+zfs_uio_prefaultpages(ssize_t n, zfs_uio_t *uio)
 {
 	struct iov_iter iter, *iterp = NULL;
 
@@ -230,40 +230,40 @@ uio_prefaultpages(ssize_t n, struct uio *uio)
 #endif
 	return (0);
 }
-EXPORT_SYMBOL(uio_prefaultpages);
+EXPORT_SYMBOL(zfs_uio_prefaultpages);
 
 /*
- * The same as uiomove() but doesn't modify uio structure.
+ * The same as zfs_uiomove() but doesn't modify uio structure.
  * return in cbytes how many bytes were copied.
  */
 int
-uiocopy(void *p, size_t n, enum uio_rw rw, struct uio *uio, size_t *cbytes)
+zfs_uiocopy(void *p, size_t n, zfs_uio_rw_t rw, zfs_uio_t *uio, size_t *cbytes)
 {
-	struct uio uio_copy;
+	zfs_uio_t uio_copy;
 	int ret;
 
-	bcopy(uio, &uio_copy, sizeof (struct uio));
+	bcopy(uio, &uio_copy, sizeof (zfs_uio_t));
 
 	if (uio->uio_segflg == UIO_BVEC)
-		ret = uiomove_bvec(p, n, rw, &uio_copy);
+		ret = zfs_uiomove_bvec(p, n, rw, &uio_copy);
 #if defined(HAVE_VFS_IOV_ITER)
 	else if (uio->uio_segflg == UIO_ITER)
-		ret = uiomove_iter(p, n, rw, &uio_copy, B_TRUE);
+		ret = zfs_uiomove_iter(p, n, rw, &uio_copy, B_TRUE);
 #endif
 	else
-		ret = uiomove_iov(p, n, rw, &uio_copy);
+		ret = zfs_uiomove_iov(p, n, rw, &uio_copy);
 
 	*cbytes = uio->uio_resid - uio_copy.uio_resid;
 
 	return (ret);
 }
-EXPORT_SYMBOL(uiocopy);
+EXPORT_SYMBOL(zfs_uiocopy);
 
 /*
  * Drop the next n chars out of *uio.
  */
 void
-uioskip(uio_t *uio, size_t n)
+zfs_uioskip(zfs_uio_t *uio, size_t n)
 {
 	if (n > uio->uio_resid)
 		return;
@@ -292,5 +292,6 @@ uioskip(uio_t *uio, size_t n)
 	uio->uio_loffset += n;
 	uio->uio_resid -= n;
 }
-EXPORT_SYMBOL(uioskip);
+EXPORT_SYMBOL(zfs_uioskip);
+
 #endif /* _KERNEL */