Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update the description of vfs_busy() and vfs_unbusy().

This commit is contained in:
hannken 2014-02-22 10:05:54 +00:00
parent fc2fa9ee78
commit 8a81f374a4
1 changed files with 32 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
share/man/man9/vfssubr.9
View File

@ -1,4 +1,4 @@
.\" $NetBSD: vfssubr.9,v 1.20 2010/12/02 12:54:13 wiz Exp $
.\" $NetBSD: vfssubr.9,v 1.21 2014/02/22 10:05:54 hannken Exp $
.\"
.\" Copyright (c) 2003, 2005, 2006 The NetBSD Foundation, Inc.
.\" All rights reserved.
@ -27,7 +27,7 @@
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
.\" POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd May 9, 2009
.Dd February 22, 2014
.Dt VFSSUBR 9
.Os
.Sh NAME
@ -74,9 +74,9 @@
.Ft void
.Fn vfs_unmountall "struct lwp *l"
.Ft int
.Fn vfs_busy "struct mount *mp" "int flags" "struct simplelock *interlkp"
.Fn vfs_busy "struct mount *mp" "struct mount **nextp"
.Ft void
.Fn vfs_unbusy "struct mount *mp"
.Fn vfs_unbusy "struct mount *mp" "bool keepref" "struct mount **nextp"
.Ft struct mount *
.Fn vfs_mountalloc "struct vfsops *vfs" "struct vnode *vp"
.Ft int
@ -130,17 +130,38 @@ by the vnode
Mount the root file system.
.It Fn vfs_unmountall "l"
Unmount all file systems.
.It Fn vfs_busy "mp" "flags" "interlkp"
.It Fn vfs_busy "mp" "nextp"
Mark the mount point specified by
.Fa mp
as busy.
as busy and get a reference to it.
This function is used to synchronize access and to delay unmounting.
The interlock specified by argument
.Fa interlkp
is not released on failure.
.It Fn vfs_unbusy "mp"
Free the busy file system specified by the mount structure
The caller must hold a pre-existing reference to the mount.
If
.Fa nextp
is not NULL, the caller must hold the
.Em mountlist_lock
and
.Fa nextp
will receive the next mount from mount list on error.
The
.Em mountlist_lock
is released on return.
.It Fn vfs_unbusy "mp" "keepref" "nextp"
Undo a
.Fn vfs_busy
on the mount point specified by
.Fa mp .
If
.Fa keepref
is true, preserve the reference added by
.Fn vfs_busy .
If
.Fa nextp
is not NULL, the
.Em mountlist_lock
will be aquired and
.Fa nextp
will receive the next mount from mount list.
.It Fn vfs_mountalloc "vfsops" "vp"
Allocate and initialise a mount structure, setting
.Em mnt_vnodecovered