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| author | jeff <jeff@FreeBSD.org> | 2005-03-29 10:10:51 +0000 |
|---|---|---|
| committer | jeff <jeff@FreeBSD.org> | 2005-03-29 10:10:51 +0000 |
| commit | 36bc306f6363f7990939e097a6d40939cd026fac (patch) | |
| tree | 08c79667dde6e50f67915de16bcc027e9d3eb0c3 /sys/ufs | |
| parent | 16ed71ae90e77e41be6d7b6db63ab38b184c88fc (diff) | |
| download | FreeBSD-src-36bc306f6363f7990939e097a6d40939cd026fac.zip FreeBSD-src-36bc306f6363f7990939e097a6d40939cd026fac.tar.gz | |
- Upgrade a shared lock request to exclusive in ffs_vget() if we have
to create the vnode.
Sponsored by: Isilon Systems, Inc.
Diffstat (limited to 'sys/ufs')
| -rw-r--r-- | sys/ufs/ffs/ffs_vfsops.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/sys/ufs/ffs/ffs_vfsops.c b/sys/ufs/ffs/ffs_vfsops.c index 04ae675..2a27502 100644 --- a/sys/ufs/ffs/ffs_vfsops.c +++ b/sys/ufs/ffs/ffs_vfsops.c @@ -1177,6 +1177,15 @@ ffs_vget(mp, ino, flags, vpp) return (error); /* + * We must promote to an exclusive lock for vnode creation. This + * can happen if lookup is passed LOCKSHARED. + */ + if ((flags & LK_TYPE_MASK) == LK_SHARED) { + flags &= ~LK_TYPE_MASK; + flags |= LK_EXCLUSIVE; + } + + /* * We do not lock vnode creation as it is believed to be too * expensive for such rare case as simultaneous creation of vnode * for same ino by different processes. We just allow them to race |
