nfs: add minor version to nfs_server_key for fscache

An NFS client that mounts multiple exports from the same NFS
server with higher NFSv4 versions disabled (i.e. 4.2) and without
forcing a specific NFS version results in fscache index cookie
collisions and the following messages:
[  570.004348] FS-Cache: Duplicate cookie detected

Each nfs_client structure should have its own fscache index cookie,
so add the minorversion to nfs_server_key.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=200145
Signed-off-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: Dave Wysochanski <dwysocha@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 989c30c..f1ff307 100644 (file)
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -153,6 +153,7 @@ struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_init)
        if ((clp = kzalloc(sizeof(*clp), GFP_KERNEL)) == NULL)
                goto error_0;
 
+       clp->cl_minorversion = cl_init->minorversion;
        clp->cl_nfs_mod = cl_init->nfs_mod;
        if (!try_module_get(clp->cl_nfs_mod->owner))
                goto error_dealloc;

diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c
index 52270bf..1abf126 100644 (file)
--- a/fs/nfs/fscache.c
+++ b/fs/nfs/fscache.c
@@ -31,6 +31,7 @@ static DEFINE_SPINLOCK(nfs_fscache_keys_lock);
 struct nfs_server_key {
        struct {
                uint16_t        nfsversion;             /* NFS protocol version */
+               uint32_t        minorversion;           /* NFSv4 minor version */
                uint16_t        family;                 /* address family */
                __be16          port;                   /* IP port */
        } hdr;
@@ -55,6 +56,7 @@ void nfs_fscache_get_client_cookie(struct nfs_client *clp)
 
        memset(&key, 0, sizeof(key));
        key.hdr.nfsversion = clp->rpc_ops->version;
+       key.hdr.minorversion = clp->cl_minorversion;
        key.hdr.family = clp->cl_addr.ss_family;
 
        switch (clp->cl_addr.ss_family) {

diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 0cd767e..0bd77cc 100644 (file)
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -216,7 +216,6 @@ struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
        INIT_LIST_HEAD(&clp->cl_ds_clients);
        rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
        clp->cl_state = 1 << NFS4CLNT_LEASE_EXPIRED;
-       clp->cl_minorversion = cl_init->minorversion;
        clp->cl_mvops = nfs_v4_minor_ops[cl_init->minorversion];
        clp->cl_mig_gen = 1;
 #if IS_ENABLED(CONFIG_NFS_V4_1)