diff options
Diffstat (limited to 'sys/fs/devfs/devfs_vnops.c')
| -rw-r--r-- | sys/fs/devfs/devfs_vnops.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/fs/devfs/devfs_vnops.c b/sys/fs/devfs/devfs_vnops.c index b9540b1..6cf2f49 100644 --- a/sys/fs/devfs/devfs_vnops.c +++ b/sys/fs/devfs/devfs_vnops.c @@ -520,7 +520,9 @@ devfs_lookupx(struct vop_lookup_args *ap) return (error); } + lockmgr(&dmp->dm_lock, LK_UPGRADE, 0, curthread); devfs_populate(dmp); + lockmgr(&dmp->dm_lock, LK_DOWNGRADE, 0, curthread); dd = dvp->v_data; TAILQ_FOREACH(de, &dd->de_dlist, de_list) { if (cnp->cn_namelen != de->de_dirent->d_namlen) @@ -550,7 +552,9 @@ devfs_lookupx(struct vop_lookup_args *ap) if (cdev == NULL) goto notfound; + lockmgr(&dmp->dm_lock, LK_UPGRADE, 0, curthread); devfs_populate(dmp); + lockmgr(&dmp->dm_lock, LK_DOWNGRADE, 0, curthread); dde = devfs_itode(dmp, cdev->si_inode); dev_rel(cdev); @@ -841,8 +845,9 @@ devfs_readdir(struct vop_readdir_args *ap) return (EINVAL); dmp = VFSTODEVFS(ap->a_vp->v_mount); - lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread); + lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread); devfs_populate(dmp); + lockmgr(&dmp->dm_lock, LK_DOWNGRADE, 0, curthread); error = 0; de = ap->a_vp->v_data; off = 0; |
