NFSv4: Add encode/decode of the layoutreturn op in CLOSE

Add XDR encoding for the layoutreturn op, and storage for the layoutreturn
arguments to the CLOSE compound.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 87972cf..9b9b0ea 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3035,10 +3035,14 @@ struct nfs4_closedata {
        struct nfs4_state *state;
        struct nfs_closeargs arg;
        struct nfs_closeres res;
+       struct {
+               struct nfs4_layoutreturn_args arg;
+               struct nfs4_layoutreturn_res res;
+               u32 roc_barrier;
+               bool roc;
+       } lr;
        struct nfs_fattr fattr;
        unsigned long timestamp;
-       bool roc;
-       u32 roc_barrier;
 };
 
 static void nfs4_free_closedata(void *data)
@@ -3047,7 +3051,7 @@ static void nfs4_free_closedata(void *data)
        struct nfs4_state_owner *sp = calldata->state->owner;
        struct super_block *sb = calldata->state->inode->i_sb;
 
-       if (calldata->roc)
+       if (calldata->lr.roc)
                pnfs_roc_release(calldata->state->inode);
        nfs4_put_open_state(calldata->state);
        nfs_free_seqid(calldata->arg.seqid);
@@ -3067,15 +3071,41 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
        if (!nfs4_sequence_done(task, &calldata->res.seq_res))
                return;
        trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
+
+       /* Handle Layoutreturn errors */
+       if (calldata->arg.lr_args && task->tk_status != 0) {
+               switch (calldata->res.lr_ret) {
+               default:
+                       calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
+                       break;
+               case 0:
+                       calldata->arg.lr_args = NULL;
+                       calldata->res.lr_res = NULL;
+                       break;
+               case -NFS4ERR_ADMIN_REVOKED:
+               case -NFS4ERR_DELEG_REVOKED:
+               case -NFS4ERR_EXPIRED:
+               case -NFS4ERR_BAD_STATEID:
+               case -NFS4ERR_OLD_STATEID:
+               case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
+               case -NFS4ERR_WRONG_CRED:
+                       calldata->arg.lr_args = NULL;
+                       calldata->res.lr_res = NULL;
+                       calldata->res.lr_ret = 0;
+                       rpc_restart_call_prepare(task);
+                       return;
+               }
+       }
+
         /* hmm. we are done with the inode, and in the process of freeing
         * the state_owner. we keep this around to process errors
         */
        switch (task->tk_status) {
                case 0:
                        res_stateid = &calldata->res.stateid;
-                       if (calldata->roc)
+                       if (calldata->lr.roc)
                                pnfs_roc_set_barrier(state->inode,
-                                                    calldata->roc_barrier);
+                                                    calldata->lr.roc_barrier);
                        renew_lease(server, calldata->timestamp);
                        break;
                case -NFS4ERR_ADMIN_REVOKED:
@@ -3151,7 +3181,7 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
                goto out_no_action;
        }
 
-       if (nfs4_wait_on_layoutreturn(inode, task)) {
+       if (!calldata->arg.lr_args && nfs4_wait_on_layoutreturn(inode, task)) {
                nfs_release_seqid(calldata->arg.seqid);
                goto out_wait;
        }
@@ -3165,8 +3195,8 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data)
                else
                        calldata->arg.bitmask = NULL;
        }
-       if (calldata->roc)
-               pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
+       if (calldata->lr.roc)
+               pnfs_roc_get_barrier(inode, &calldata->lr.roc_barrier);
 
        calldata->arg.share_access =
                nfs4_map_atomic_open_share(NFS_SERVER(inode),
@@ -3250,7 +3280,8 @@ int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
        calldata->res.fattr = &calldata->fattr;
        calldata->res.seqid = calldata->arg.seqid;
        calldata->res.server = server;
-       calldata->roc = nfs4_roc(state->inode);
+       calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
+       calldata->lr.roc = nfs4_roc(state->inode);
        nfs_sb_active(calldata->inode->i_sb);
 
        msg.rpc_argp = &calldata->arg;

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 0a82b3f..73d2a68 100644 (file)
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -415,6 +415,8 @@ static int nfs4_stat_to_errno(int);
 #else /* CONFIG_NFS_V4_1 */
 #define encode_sequence_maxsz  0
 #define decode_sequence_maxsz  0
+#define encode_layoutreturn_maxsz 0
+#define decode_layoutreturn_maxsz 0
 #endif /* CONFIG_NFS_V4_1 */
 
 #define NFS4_enc_compound_sz   (1024)  /* XXX: large enough? */
@@ -508,11 +510,13 @@ static int nfs4_stat_to_errno(int);
 #define NFS4_enc_close_sz      (compound_encode_hdr_maxsz + \
                                 encode_sequence_maxsz + \
                                 encode_putfh_maxsz + \
+                                encode_layoutreturn_maxsz + \
                                 encode_close_maxsz + \
                                 encode_getattr_maxsz)
 #define NFS4_dec_close_sz      (compound_decode_hdr_maxsz + \
                                 decode_sequence_maxsz + \
                                 decode_putfh_maxsz + \
+                                decode_layoutreturn_maxsz + \
                                 decode_close_maxsz + \
                                 decode_getattr_maxsz)
 #define NFS4_enc_setattr_sz    (compound_encode_hdr_maxsz + \
@@ -2061,6 +2065,13 @@ static void encode_free_stateid(struct xdr_stream *xdr,
        encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);
        encode_nfs4_stateid(xdr, &args->stateid);
 }
+#else
+static inline void
+encode_layoutreturn(struct xdr_stream *xdr,
+                   const struct nfs4_layoutreturn_args *args,
+                   struct compound_hdr *hdr)
+{
+}
 #endif /* CONFIG_NFS_V4_1 */
 
 /*
@@ -2248,6 +2259,8 @@ static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr,
        encode_compound_hdr(xdr, req, &hdr);
        encode_sequence(xdr, &args->seq_args, &hdr);
        encode_putfh(xdr, args->fh, &hdr);
+       if (args->lr_args)
+               encode_layoutreturn(xdr, args->lr_args, &hdr);
        encode_close(xdr, args, &hdr);
        if (args->bitmask != NULL)
                encode_getfattr(xdr, args->bitmask, &hdr);
@@ -6088,6 +6101,13 @@ static int decode_free_stateid(struct xdr_stream *xdr,
        res->status = decode_op_hdr(xdr, OP_FREE_STATEID);
        return res->status;
 }
+#else
+static inline
+int decode_layoutreturn(struct xdr_stream *xdr,
+                              struct nfs4_layoutreturn_res *res)
+{
+       return 0;
+}
 #endif /* CONFIG_NFS_V4_1 */
 
 /*
@@ -6440,6 +6460,12 @@ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr,
        status = decode_putfh(xdr);
        if (status)
                goto out;
+       if (res->lr_res) {
+               status = decode_layoutreturn(xdr, res->lr_res);
+               res->lr_ret = status;
+               if (status)
+                       goto out;
+       }
        status = decode_close(xdr, res);
        if (status != 0)
                goto out;

diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index beb1e10..44ed64b 100644 (file)
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -469,6 +469,7 @@ struct nfs_closeargs {
        fmode_t                 fmode;
        u32                     share_access;
        const u32 *             bitmask;
+       struct nfs4_layoutreturn_args *lr_args;
 };
 
 struct nfs_closeres {
@@ -477,6 +478,8 @@ struct nfs_closeres {
        struct nfs_fattr *      fattr;
        struct nfs_seqid *      seqid;
        const struct nfs_server *server;
+       struct nfs4_layoutreturn_res *lr_res;
+       int lr_ret;
 };
 /*
  *  * Arguments to the lock,lockt, and locku call.