From 8842b3be96c376f174ae0d4f282d14728ad5febf Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Thu, 7 Jun 2012 13:43:35 -0700 Subject: [PATCH] ceph: clean up useless d_parent checks d_parent is never NULL, and IS_ROOT() is the proper way to check for a (non-self-referential) parent. Reported-by: Al Viro Signed-off-by: Sage Weil --- fs/ceph/dir.c | 7 +++---- fs/ceph/mds_client.c | 11 ----------- 2 files changed, 3 insertions(+), 15 deletions(-) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 3e8094be4604..6a66bd2d4da0 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -51,8 +51,7 @@ int ceph_init_dentry(struct dentry *dentry) goto out_unlock; } - if (dentry->d_parent == NULL || /* nfs fh_to_dentry */ - ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP) + if (ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP) d_set_d_op(dentry, &ceph_dentry_ops); else if (ceph_snap(dentry->d_parent->d_inode) == CEPH_SNAPDIR) d_set_d_op(dentry, &ceph_snapdir_dentry_ops); @@ -79,7 +78,7 @@ struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry) return NULL; spin_lock(&dentry->d_lock); - if (dentry->d_parent) { + if (!IS_ROOT(dentry)) { inode = dentry->d_parent->d_inode; ihold(inode); } @@ -1140,7 +1139,7 @@ static void ceph_d_prune(struct dentry *dentry) dout("ceph_d_prune %p\n", dentry); /* do we have a valid parent? */ - if (!dentry->d_parent || IS_ROOT(dentry)) + if (IS_ROOT(dentry)) return; /* if we are not hashed, we don't affect D_COMPLETE */ diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 5ac6434185ae..418f6a82c90d 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -1469,11 +1469,6 @@ retry: else len += 1 + temp->d_name.len; temp = temp->d_parent; - if (temp == NULL) { - rcu_read_unlock(); - pr_err("build_path corrupt dentry %p\n", dentry); - return ERR_PTR(-EINVAL); - } } rcu_read_unlock(); if (len) @@ -1510,12 +1505,6 @@ retry: if (pos) path[--pos] = '/'; temp = temp->d_parent; - if (temp == NULL) { - rcu_read_unlock(); - pr_err("build_path corrupt dentry\n"); - kfree(path); - return ERR_PTR(-EINVAL); - } } rcu_read_unlock(); if (pos != 0 || read_seqretry(&rename_lock, seq)) { -- 2.30.2