Messages in this thread Patch in this message | | | From | yan <> | Subject | [PATCH 2/2] fs/namei.c: only check mountpoint on non-negative dentry | Date | Fri, 24 Aug 2012 19:51:37 +0800 |
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Signed-off-by: yan <clouds.yan@gmail.com> --- fs/namei.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c index dd1ed1b..028f5c8 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -3628,11 +3628,15 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry, return error; dget(new_dentry); - if (target) - mutex_lock(&target->i_mutex); error = -EBUSY; - if (d_mountpoint(old_dentry) || d_mountpoint(new_dentry)) + if (target){ + mutex_lock(&target->i_mutex); + if (d_mountpoint(new_dentry)) + goto out; + } + + if (d_mountpoint(old_dentry)) goto out; error = -EMLINK; @@ -3671,11 +3675,15 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry, return error; dget(new_dentry); - if (target) - mutex_lock(&target->i_mutex); error = -EBUSY; - if (d_mountpoint(old_dentry)||d_mountpoint(new_dentry)) + if (target){ + mutex_lock(&target->i_mutex); + if (d_mountpoint(new_dentry)) + goto out; + } + + if (d_mountpoint(old_dentry)) goto out; error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry); -- 1.7.9.5
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