Hi Trond,
I’ve squashed the fix for the issue Anna raised into this patch.
Please use it in place of the v6 version.
Thanks,
Tom
> On Feb 3, 2015, at 10:45 AM, Tom Haynes <thomas.haynes@xxxxxxxxxxxxxxx> wrote:
>
> From: Peng Tao <tao.peng@xxxxxxxxxxxxxxx>
>
> Signed-off-by: Peng Tao <tao.peng@xxxxxxxxxxxxxxx>
> Signed-off-by: Tom Haynes <Thomas.Haynes@xxxxxxxxxxxxxxx>
> ---
> fs/nfs/nfs4super.c | 3 ++
> fs/nfs/pnfs.h | 7 ++++-
> fs/nfs/pnfs_nfs.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++++---
> 3 files changed, 93 insertions(+), 5 deletions(-)
>
> diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
> index 6f340f0..48cea3c 100644
> --- a/fs/nfs/nfs4super.c
> +++ b/fs/nfs/nfs4super.c
> @@ -346,6 +346,9 @@ out:
>
> static void __exit exit_nfs_v4(void)
> {
> + /* Not called in the _init(), conditionally loaded */
> + nfs4_pnfs_v3_ds_connect_unload();
> +
> unregister_nfs_version(&nfs_v4);
> nfs4_unregister_sysctl();
> nfs_idmap_quit();
> diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
> index 70ffec1..c398821 100644
> --- a/fs/nfs/pnfs.h
> +++ b/fs/nfs/pnfs.h
> @@ -323,9 +323,10 @@ void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
> void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
> struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
> gfp_t gfp_flags);
> +void nfs4_pnfs_v3_ds_connect_unload(void);
> void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
> struct nfs4_deviceid_node *devid, unsigned int timeo,
> - unsigned int retrans, u32 versoin, u32 minor_version,
> + unsigned int retrans, u32 version, u32 minor_version,
> rpc_authflavor_t au_flavor);
> struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
> struct xdr_stream *xdr,
> @@ -615,6 +616,10 @@ static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
> return NULL;
> }
>
> +static inline void nfs4_pnfs_v3_ds_connect_unload(void)
> +{
> +}
> +
> #endif /* CONFIG_NFS_V4_1 */
>
> #endif /* FS_NFS_PNFS_H */
> diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
> index ad211a4..23c851d 100644
> --- a/fs/nfs/pnfs_nfs.c
> +++ b/fs/nfs/pnfs_nfs.c
> @@ -10,6 +10,7 @@
> #include <linux/nfs_fs.h>
> #include <linux/nfs_page.h>
> #include <linux/sunrpc/addr.h>
> +#include <linux/module.h>
>
> #include "nfs4session.h"
> #include "internal.h"
> @@ -550,7 +551,75 @@ static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds)
> wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING);
> }
>
> -static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
> +static struct nfs_client *(*get_v3_ds_connect)(
> + struct nfs_client *mds_clp,
> + const struct sockaddr *ds_addr,
> + int ds_addrlen,
> + int ds_proto,
> + unsigned int ds_timeo,
> + unsigned int ds_retrans,
> + rpc_authflavor_t au_flavor);
> +
> +static bool load_v3_ds_connect(void)
> +{
> + if (!get_v3_ds_connect) {
> + get_v3_ds_connect = symbol_request(nfs3_set_ds_client);
> + WARN_ON_ONCE(!get_v3_ds_connect);
> + }
> +
> + return(get_v3_ds_connect != NULL);
> +}
> +
> +void __exit nfs4_pnfs_v3_ds_connect_unload(void)
> +{
> + if (get_v3_ds_connect) {
> + symbol_put(nfs3_set_ds_client);
> + get_v3_ds_connect = NULL;
> + }
> +}
> +EXPORT_SYMBOL_GPL(nfs4_pnfs_v3_ds_connect_unload);
> +
> +static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv,
> + struct nfs4_pnfs_ds *ds,
> + unsigned int timeo,
> + unsigned int retrans,
> + rpc_authflavor_t au_flavor)
> +{
> + struct nfs_client *clp = ERR_PTR(-EIO);
> + struct nfs4_pnfs_ds_addr *da;
> + int status = 0;
> +
> + dprintk("--> %s DS %s au_flavor %d\n", __func__,
> + ds->ds_remotestr, au_flavor);
> +
> + if (!load_v3_ds_connect())
> + goto out;
> +
> + list_for_each_entry(da, &ds->ds_addrs, da_node) {
> + dprintk("%s: DS %s: trying address %s\n",
> + __func__, ds->ds_remotestr, da->da_remotestr);
> +
> + clp = get_v3_ds_connect(mds_srv->nfs_client,
> + (struct sockaddr *)&da->da_addr,
> + da->da_addrlen, IPPROTO_TCP,
> + timeo, retrans, au_flavor);
> + if (!IS_ERR(clp))
> + break;
> + }
> +
> + if (IS_ERR(clp)) {
> + status = PTR_ERR(clp);
> + goto out;
> + }
> +
> + smp_wmb();
> + ds->ds_clp = clp;
> + dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
> +out:
> + return status;
> +}
> +
> +static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv,
> struct nfs4_pnfs_ds *ds,
> unsigned int timeo,
> unsigned int retrans,
> @@ -562,7 +631,7 @@ static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
> int status = 0;
>
> dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr,
> - mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor);
> + au_flavor);
>
> list_for_each_entry(da, &ds->ds_addrs, da_node) {
> dprintk("%s: DS %s: trying address %s\n",
> @@ -609,8 +678,19 @@ void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
> if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
> int err = 0;
>
> - err = _nfs4_pnfs_ds_connect(mds_srv, ds, timeo, retrans,
> - minor_version, au_flavor);
> + if (version == 3) {
> + err = _nfs4_pnfs_v3_ds_connect(mds_srv, ds, timeo,
> + retrans, au_flavor);
> + } else if (version == 4) {
> + err = _nfs4_pnfs_v4_ds_connect(mds_srv, ds, timeo,
> + retrans, minor_version,
> + au_flavor);
> + } else {
> + dprintk("%s: unsupported DS version %d\n", __func__,
> + version);
> + err = -EPROTONOSUPPORT;
> + }
> +
> if (err)
> nfs4_mark_deviceid_unavailable(devid);
> nfs4_clear_ds_conn_bit(ds);
> --
> 1.9.3
>
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