Setting the maximum length of a pathname component
via the namlen= mount option is currently broken in NFSv4.
This patch will fix this issue.
Signed-off-by: Chen Hanxiao <chenhx.fnst@xxxxxxxxxxx>
---
fs/nfs/namespace.c | 2 ++
fs/nfs/nfs4client.c | 2 ++
fs/nfs/nfs4namespace.c | 2 ++
3 files changed, 6 insertions(+)
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index e7494cdd957e..8da1fc9ebbd4 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -277,6 +277,8 @@ int nfs_do_submount(struct fs_context *fc)
if (IS_ERR(server))
return PTR_ERR(server);
+ if (ctx->namlen)
+ server->namelen = ctx->namlen;
ctx->server = server;
buffer = kmalloc(4096, GFP_USER);
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 11e3a285594c..9826c2fcb0a7 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -1187,6 +1187,8 @@ static int nfs4_init_server(struct nfs_server *server, struct fs_context *fc)
server->rsize = nfs_io_size(ctx->rsize, server->nfs_client->cl_proto);
if (ctx->wsize)
server->wsize = nfs_io_size(ctx->wsize, server->nfs_client->cl_proto);
+ if (ctx->namlen)
+ server->namelen = ctx->namlen;
server->acregmin = ctx->acregmin * HZ;
server->acregmax = ctx->acregmax * HZ;
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 9a98595bb160..1a30224df7b9 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -465,6 +465,8 @@ int nfs4_submount(struct fs_context *fc, struct nfs_server *server)
return PTR_ERR(client);
ctx->selected_flavor = client->cl_auth->au_flavor;
+ if (server->namelen)
+ ctx->namlen = server->namelen;
if (ctx->clone_data.fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
ret = nfs_do_refmount(fc, client);
} else {
--
2.39.1
