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| author |   uwe <uwe@openbsd.org> | 2005-11-16 15:15:49 +0000 |
|---|---|---|
| committer | uwe <uwe@openbsd.org> | 2005-11-16 15:15:49 +0000 |
| commit | 19c223fc0727925b260718149b40c3886ab0bc6d (patch) | |
| tree | 5e3e6ea22007d68748dfaf1cc718cf26fa27ceae | |
| parent | nuke trailing whitespace; (diff) | |
| download | wireguard-openbsd-19c223fc0727925b260718149b40c3886ab0bc6d.tar.xz wireguard-openbsd-19c223fc0727925b260718149b40c3886ab0bc6d.zip | |
Suggest filling in uio_procp even if the area is in kernel-space if
the structure is passed to functions other than uiomove();
discussed with pedro@
| -rw-r--r-- | share/man/man9/uiomove.9 | 14 | ||||
| -rw-r--r-- | sys/sys/uio.h | 4 |
2 files changed, 12 insertions, 6 deletions
diff --git a/share/man/man9/uiomove.9 b/share/man/man9/uiomove.9 index 6b889b66baa..72cf3c59bfe 100644 --- a/share/man/man9/uiomove.9 +++ b/share/man/man9/uiomove.9 @@ -1,4 +1,4 @@ -.\" $OpenBSD: uiomove.9,v 1.9 2005/02/14 18:44:21 jmc Exp $ +.\" $OpenBSD: uiomove.9,v 1.10 2005/11/16 15:15:49 uwe Exp $ .\" $NetBSD: uiomove.9,v 1.6 2001/12/26 00:16:30 wiz Exp $ .\" .\" Copyright (c) 1996 The NetBSD Foundation, Inc. @@ -68,7 +68,7 @@ struct uio { size_t uio_resid; /* residual i/o count */ enum uio_seg uio_segflg; enum uio_rw uio_rw; - struct proc *uio_procp;/* process if UIO_USERSPACE */ + struct proc *uio_procp;/* associated process or NULL */ }; .Ed .Pp @@ -99,8 +99,14 @@ A flag indicating whether the space described is in user-space A flag indicating whether data should be read into the space (UIO_READ) or written from the space (UIO_WRITE). .It uio_procp -A pointer to the process whose data area is described by the -structure, or NULL if the area is in kernel-space. +A pointer to a process whose data area is described by the +structure, or which is having the I/O done on its behalf if +the area is in kernel-space. +.Nm uiomove +itself does not use this field if the area is in kernel-space, +but other functions that take a +.Fa struct uio +may depend on this information. .El .Pp The value of diff --git a/sys/sys/uio.h b/sys/sys/uio.h index c704cce675e..0dde7978a52 100644 --- a/sys/sys/uio.h +++ b/sys/sys/uio.h @@ -1,4 +1,4 @@ -/* $OpenBSD: uio.h,v 1.11 2003/06/02 23:28:22 millert Exp $ */ +/* $OpenBSD: uio.h,v 1.12 2005/11/16 15:15:49 uwe Exp $ */ /* $NetBSD: uio.h,v 1.12 1996/02/09 18:25:45 christos Exp $ */ /* @@ -56,7 +56,7 @@ struct uio { size_t uio_resid; /* residual i/o count */ enum uio_seg uio_segflg; /* see above */ enum uio_rw uio_rw; /* see above */ - struct proc *uio_procp;/* process if UIO_USERSPACE */ + struct proc *uio_procp;/* associated process or NULL */ }; /* |