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authortegge <tegge@FreeBSD.org>2006-09-26 04:12:49 +0000
committertegge <tegge@FreeBSD.org>2006-09-26 04:12:49 +0000
commit83154f853d9ca39deb1add01e032aff1f0678514 (patch)
treeac46e0b5a80f88127d3d14dc940a5f2746573c00 /sys/gnu/fs/reiserfs/reiserfs_vfsops.c
parentd7fe3e736512a1dd37a985037184eecf7df1f26d (diff)
downloadFreeBSD-src-83154f853d9ca39deb1add01e032aff1f0678514.zip
FreeBSD-src-83154f853d9ca39deb1add01e032aff1f0678514.tar.gz
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag.
This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
Diffstat (limited to 'sys/gnu/fs/reiserfs/reiserfs_vfsops.c')
-rw-r--r--sys/gnu/fs/reiserfs/reiserfs_vfsops.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/gnu/fs/reiserfs/reiserfs_vfsops.c b/sys/gnu/fs/reiserfs/reiserfs_vfsops.c
index b6436ae..066d5b2 100644
--- a/sys/gnu/fs/reiserfs/reiserfs_vfsops.c
+++ b/sys/gnu/fs/reiserfs/reiserfs_vfsops.c
@@ -241,7 +241,9 @@ reiserfs_unmount(struct mount *mp, int mntflags, struct thread *td)
}
mp->mnt_data = (qaddr_t)0;
+ MNT_ILOCK(mp);
mp->mnt_flag &= ~MNT_LOCAL;
+ MNT_IUNLOCK(mp);
reiserfs_log(LOG_DEBUG, "done\n");
return (error);
@@ -624,7 +626,9 @@ reiserfs_mountfs(struct vnode *devvp, struct mount *mp, struct thread *td)
mp->mnt_data = (qaddr_t)rmp;
mp->mnt_stat.f_fsid.val[0] = dev2udev(dev);
mp->mnt_stat.f_fsid.val[1] = mp->mnt_vfc->vfc_typenum;
+ MNT_ILOCK(mp);
mp->mnt_flag |= MNT_LOCAL;
+ MNT_IUNLOCK(mp);
#if defined(si_mountpoint)
devvp->v_rdev->si_mountpoint = mp;
#endif
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