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Clarify more of what VOP_LINK expects.

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Matthew Dillon 1999-02-13 07:56:49 +00:00
parent 3ac84fed2e
commit c20b4df657
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=43954
1 changed files with 10 additions and 5 deletions
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15
share/man/man9/VOP_LINK.9
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@ -26,7 +26,7 @@
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.\" $Id: VOP_LINK.9,v 1.4 1998/03/12 07:31:11 charnier Exp $
.\" $Id: VOP_LINK.9,v 1.5 1999/02/13 07:44:14 dillon Exp $
.\"
.Dd July 24, 1996
.Os
@ -57,11 +57,13 @@ file vnodes should NOT be released on exit.
.Sh LOCKS
The directory,
.Fa dvp
should be locked on entry. The caller will unlock and release
it on return so the VOP routine should not.
is locked on entry. The caller will unlock and release the directory
on return. The VOP routine should not try to unlock or release
the directory.
The file
.Fa vp
should not be locked.
is not locked on entry. If the VOP routine locks it, it must remember
to unlock it prior to returning.
.Sh RETURN VALUES
Zero is returned if the file was linked successfully, otherwise an
error is returned.
@ -82,6 +84,10 @@ vop_link(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
goto out2;
}
/*
* now that we've locked vp, we have to use out1 instead of out2
*/
if (vp would have too many links) {
VOP_ABORTOP(dvp, cnp);
error = EMLINK;
@ -111,7 +117,6 @@ out1:
if (vp != dvp)
VOP_UNLOCK(vp);
out2:
vput(dvp);
return error;
}