NFS: Fix the verifier for case sensitive filesystem in nfs_atomic_open()

[ Upstream commit 68eaba4ca924a97a863c5c81c0b23a11dcb6db90 ]

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Stable-dep-of: 518c32a1bc4f ("NFS: Initialise verifiers for visible dentries in nfs_atomic_open()")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 2a325a79327bc115e79e3d812363f32a1f09cbb0..dc0c50b97643b2f63fb7556729184df6db9006dc 100644 (file)
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1887,6 +1887,7 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
        struct iattr attr = { .ia_valid = ATTR_OPEN };
        struct inode *inode;
        unsigned int lookup_flags = 0;
+       unsigned long dir_verifier;
        bool switched = false;
        int created = 0;
        int err;
@@ -1960,7 +1961,11 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
                switch (err) {
                case -ENOENT:
                        d_splice_alias(NULL, dentry);
-                       nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
+                       if (nfs_server_capable(dir, NFS_CAP_CASE_INSENSITIVE))
+                               dir_verifier = inode_peek_iversion_raw(dir);
+                       else
+                               dir_verifier = nfs_save_change_attribute(dir);
+                       nfs_set_verifier(dentry, dir_verifier);
                        break;
                case -EISDIR:
                case -ENOTDIR: