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Add locking around calls to unionfs_get_node_status()

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in unionfs_ioctl() and unionfs_poll().

Submitted by:	daichi, Masanori OZAWA <ozawa@ongs.co.jp>
Prompted by:	kris
This commit is contained in:
rodrigc 2006-12-09 16:51:09 +00:00
parent 951f903c66
commit b2bd033255
1 changed files with 4 additions and 0 deletions
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4
sys/fs/unionfs/union_vnops.c
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@ -872,9 +872,11 @@ unionfs_ioctl(struct vop_ioctl_args *ap)
UNIONFS_INTERNAL_DEBUG("unionfs_ioctl: enter\n");
vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY, ap->a_td);
unp = VTOUNIONFS(ap->a_vp);
unionfs_get_node_status(unp, ap->a_td, &unsp);
ovp = (unsp->uns_upper_opencnt ? unp->un_uppervp : unp->un_lowervp);
VOP_UNLOCK(ap->a_vp, 0, ap->a_td);
if (ovp == NULLVP)
return (EBADF);
@ -894,9 +896,11 @@ unionfs_poll(struct vop_poll_args *ap)
struct unionfs_node_status *unsp;
struct vnode *ovp;
vn_lock(ap->a_vp, LK_EXCLUSIVE | LK_RETRY, ap->a_td);
unp = VTOUNIONFS(ap->a_vp);
unionfs_get_node_status(unp, ap->a_td, &unsp);
ovp = (unsp->uns_upper_opencnt ? unp->un_uppervp : unp->un_lowervp);
VOP_UNLOCK(ap->a_vp, 0, ap->a_td);
if (ovp == NULLVP)
return (EBADF);