diff options
Diffstat (limited to 'sys/fs/devfs/devfs_vnops.c')
| -rw-r--r-- | sys/fs/devfs/devfs_vnops.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sys/fs/devfs/devfs_vnops.c b/sys/fs/devfs/devfs_vnops.c index 0acf99b..fcf3b3a 100644 --- a/sys/fs/devfs/devfs_vnops.c +++ b/sys/fs/devfs/devfs_vnops.c @@ -75,6 +75,8 @@ static struct fileops devfs_ops_f; struct mtx devfs_de_interlock; MTX_SYSINIT(devfs_de_interlock, &devfs_de_interlock, "devfs interlock", MTX_DEF); +struct sx clone_drain_lock; +SX_SYSINIT(clone_drain_lock, &clone_drain_lock, "clone events drain lock"); static int devfs_fp_check(struct file *fp, struct cdev **devp, struct cdevsw **dswp) @@ -618,8 +620,19 @@ devfs_lookupx(struct vop_lookup_args *ap, int *dm_unlock) break; cdev = NULL; + DEVFS_DMP_HOLD(dmp); + sx_xunlock(&dmp->dm_lock); + sx_slock(&clone_drain_lock); EVENTHANDLER_INVOKE(dev_clone, td->td_ucred, pname, strlen(pname), &cdev); + sx_sunlock(&clone_drain_lock); + sx_xlock(&dmp->dm_lock); + if (DEVFS_DMP_DROP(dmp)) { + *dm_unlock = 0; + sx_xunlock(&dmp->dm_lock); + devfs_unmount_final(dmp); + return (ENOENT); + } if (cdev == NULL) break; |
