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| author | tjr <tjr@FreeBSD.org> | 2003-01-28 09:21:42 +0000 |
|---|---|---|
| committer | tjr <tjr@FreeBSD.org> | 2003-01-28 09:21:42 +0000 |
| commit | 7c38f578b5877b50b60f04abe40a312d23222720 (patch) | |
| tree | 048cfc3375d61c32327f09a15bb024e59bddd1c3 | |
| parent | 23ad122bb92148a7ed9b210749bff81edd4c963e (diff) | |
| download | FreeBSD-src-7c38f578b5877b50b60f04abe40a312d23222720.zip FreeBSD-src-7c38f578b5877b50b60f04abe40a312d23222720.tar.gz | |
Do not allow a cached vnode to be shared among multiple mounts of the same
kind of pseudofs-based filesystem. Fixes (at least) one problem where
when procfs is mounted mupltiple times, trying to unmount one will often
cause the wrong one to get unmounted, and other problem where mounting
one procfs on top of another caused the kernel to lock up.
Reviewed by: des
| -rw-r--r-- | sys/fs/pseudofs/pseudofs_vncache.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/fs/pseudofs/pseudofs_vncache.c b/sys/fs/pseudofs/pseudofs_vncache.c index a1be1f1..eed7aef 100644 --- a/sys/fs/pseudofs/pseudofs_vncache.c +++ b/sys/fs/pseudofs/pseudofs_vncache.c @@ -113,7 +113,8 @@ pfs_vncache_alloc(struct mount *mp, struct vnode **vpp, */ mtx_lock(&pfs_vncache_mutex); for (pvd = pfs_vncache; pvd; pvd = pvd->pvd_next) { - if (pvd->pvd_pn == pn && pvd->pvd_pid == pid) { + if (pvd->pvd_pn == pn && pvd->pvd_pid == pid && + pvd->pvd_vnode->v_mount == mp) { if (vget(pvd->pvd_vnode, 0, curthread) == 0) { ++pfs_vncache_hits; *vpp = pvd->pvd_vnode; |
