[RFC PATCH v5 14/19] ceph: make d_revalidate call fscrypt revalidator for encrypted dentries

Jeff Layton
2021-03-26T17:33:19Z

If we have a dentry which represents a no-key name, then we need to test
whether the parent directory's encryption key has since been added. Do
that before we test anything else about the dentry.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
fs/ceph/dir.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 72728850e96c..867e396f44f1 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1697,6 +1697,10 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
struct inode *dir, *inode;
struct ceph_mds_client *mdsc;

+ valid = fscrypt_d_revalidate(dentry, flags);
+ if (valid <= 0)
+ return valid;
+
if (flags & LOOKUP_RCU) {
parent = READ_ONCE(dentry->d_parent);
dir = d_inode_rcu(parent);
@@ -1709,8 +1713,8 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
inode = d_inode(dentry);
}

- dout("d_revalidate %p '%pd' inode %p offset 0x%llx\n", dentry,
- dentry, inode, ceph_dentry(dentry)->offset);
+ dout("d_revalidate %p '%pd' inode %p offset 0x%llx nokey %d\n", dentry,
+ dentry, inode, ceph_dentry(dentry)->offset, !!(dentry->d_flags & DCACHE_NOKEY_NAME));

mdsc = ceph_sb_to_client(dir->i_sb)->mdsc;

--
2.30.2