From 774ac21da76f5c3018428725074e27a3fd40b128 Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Fri, 11 Nov 2011 09:48:08 -0800 Subject: [PATCH] ceph: initialize root dentry Set up d_fsdata on the root dentry. This fixes a NULL pointer dereference in ceph_d_prune on umount. It also means we can eventually strip out all of the conditional checks on d_fsdata because it is now set unconditionally (prior to setting up the d_ops). Fix the ceph_d_prune debug print while we're here. Signed-off-by: Sage Weil --- fs/ceph/dir.c | 2 +- fs/ceph/super.c | 6 ++++-- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 2abd0dfad7f8..bca3948e9dbf 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -1143,7 +1143,7 @@ static void ceph_d_prune(struct dentry *dentry) { struct ceph_dentry_info *di; - dout("d_release %p\n", dentry); + dout("ceph_d_prune %p\n", dentry); /* do we have a valid parent? */ if (!dentry->d_parent || IS_ROOT(dentry)) diff --git a/fs/ceph/super.c b/fs/ceph/super.c index a90846fac759..8dc73a594a90 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -638,10 +638,12 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, if (err == 0) { dout("open_root_inode success\n"); if (ceph_ino(req->r_target_inode) == CEPH_INO_ROOT && - fsc->sb->s_root == NULL) + fsc->sb->s_root == NULL) { root = d_alloc_root(req->r_target_inode); - else + ceph_init_dentry(root); + } else { root = d_obtain_alias(req->r_target_inode); + } req->r_target_inode = NULL; dout("open_root_inode success, root dentry is %p\n", root); } else { -- 2.39.5