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Code Issues Releases Activity

Fixed locking violation of vnode operation. VOP_READ, VOP_WRITE and

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VOP_BMAP require locked vnode, and they will keep lock on exit.
This commit is contained in:
KATO Takenori 1997-08-14 13:44:19 +00:00
parent 44beef22f3
commit fb35546309
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=28217
1 changed files with 7 additions and 2 deletions
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9
sys/dev/vn/vn.c
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@ -38,7 +38,7 @@
* from: Utah Hdr: vn.c 1.13 94/04/02
*
* from: @(#)vn.c 8.6 (Berkeley) 4/1/94
* $Id: vn.c,v 1.47 1997/04/30 11:16:25 dfr Exp $
* $Id: vn.c,v 1.48 1997/06/14 13:56:09 bde Exp $
*/
/*
@ -276,11 +276,12 @@ vnstrategy(struct buf *bp)
auio.uio_rw = UIO_WRITE;
auio.uio_resid = bp->b_bcount;
auio.uio_procp = curproc;
vn_lock(vn->sc_vp, LK_EXCLUSIVE | LK_RETRY, curproc);
if( bp->b_flags & B_READ)
error = VOP_READ(vn->sc_vp, &auio, 0, vn->sc_cred);
else
error = VOP_WRITE(vn->sc_vp, &auio, 0, vn->sc_cred);
VOP_UNLOCK(vn->sc_vp, 0, curproc);
bp->b_resid = auio.uio_resid;
if( error )
@ -304,8 +305,10 @@ vnstrategy(struct buf *bp)
int off, s, nra;
nra = 0;
vn_lock(vn->sc_vp, LK_EXCLUSIVE | LK_RETRY, curproc);
error = VOP_BMAP(vn->sc_vp, (daddr_t)(byten / bsize),
&vp, &nbn, &nra, NULL);
VOP_UNLOCK(vn->sc_vp, 0, curproc);
if (error == 0 && nbn == -1)
error = EIO;
@ -553,7 +556,9 @@ vnsetcred(struct vn_softc *vn, struct ucred *cred)
auio.uio_rw = UIO_READ;
auio.uio_segflg = UIO_SYSSPACE;
auio.uio_resid = aiov.iov_len;
vn_lock(vn->sc_vp, LK_EXCLUSIVE | LK_RETRY, curproc);
error = VOP_READ(vn->sc_vp, &auio, 0, vn->sc_cred);
VOP_UNLOCK(vn->sc_vp, 0, curproc);
free(tmpbuf, M_TEMP);
return (error);