diff options
| author | markj <markj@FreeBSD.org> | 2016-01-18 22:21:46 +0000 |
|---|---|---|
| committer | markj <markj@FreeBSD.org> | 2016-01-18 22:21:46 +0000 |
| commit | 09fb369fc5164b2baaba44740ab7379c43306071 (patch) | |
| tree | 93731c648315eadaf2fcf33fef8fe7ef553fd8ce /share/man | |
| parent | cf792338169fcd15fbb628696c34d234e8781827 (diff) | |
| download | FreeBSD-src-09fb369fc5164b2baaba44740ab7379c43306071.zip FreeBSD-src-09fb369fc5164b2baaba44740ab7379c43306071.tar.gz | |
Add vrefl(), a locked variant of vref(9).
This API has no in-tree consumers at the moment but is useful to at least
one out-of-tree consumer, and naturally complements existing vnode refcount
functions (vholdl(9), vdropl(9)).
Obtained from: kib (sys/ portion)
Sponsored by: EMC / Isilon Storage Division
Differential Revision: https://reviews.freebsd.org/D4947
Differential Revision: https://reviews.freebsd.org/D4953
Diffstat (limited to 'share/man')
| -rw-r--r-- | share/man/man9/vref.9 | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/share/man/man9/vref.9 b/share/man/man9/vref.9 index f21b9f2..7b0c0f3 100644 --- a/share/man/man9/vref.9 +++ b/share/man/man9/vref.9 @@ -28,17 +28,19 @@ .\" .\" $FreeBSD$ .\" -.Dd July 24, 1996 +.Dd January 18, 2016 .Dt VREF 9 .Os .Sh NAME -.Nm vref +.Nm vref , vrefl .Nd increment the use count for a vnode .Sh SYNOPSIS .In sys/param.h .In sys/vnode.h .Ft void .Fn vref "struct vnode *vp" +.Ft void +.Fn vrefl "struct vnode *vp" .Sh DESCRIPTION Increment the .Va v_usecount @@ -56,7 +58,14 @@ no longer being used and can be safely recycled for a different file. Any code in the system which is using a vnode (e.g.\& during the operation of some algorithm or to store in a data structure) should call -.Fn vref . +.Fn vref +or +.Fn vrefl . +.Pp +.Fn vref +locks the vnode interlock while +.Fn vrefl +expects the interlock to already be held. .Sh SEE ALSO .Xr vget 9 , .Xr vnode 9 , |
