NFSv4: Ensure DELEGRETURN returns attributes

 Upon return of a write delegation, the server will almost always bump the
 change attribute. Ensure that we pick up that change so that we don't
 invalidate our data cache unnecessarily.

 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index d2ee09b..66cc720 100644 (file)
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -159,8 +159,6 @@ static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation *
 {
        int res = 0;
 
-       __nfs_revalidate_inode(NFS_SERVER(inode), inode);
-
        res = nfs4_proc_delegreturn(inode, delegation->cred, &delegation->stateid);
        nfs_free_delegation(delegation);
        return res;

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b334915..984ca34 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2920,11 +2920,12 @@ nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
 
 struct nfs4_delegreturndata {
        struct nfs4_delegreturnargs args;
+       struct nfs4_delegreturnres res;
        struct nfs_fh fh;
        nfs4_stateid stateid;
        struct rpc_cred *cred;
        unsigned long timestamp;
-       const struct nfs_server *server;
+       struct nfs_fattr fattr;
        int rpc_status;
 };
 
@@ -2934,8 +2935,10 @@ static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
        struct rpc_message msg = {
                .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
                .rpc_argp = &data->args,
+               .rpc_resp = &data->res,
                .rpc_cred = data->cred,
        };
+       nfs_fattr_init(data->res.fattr);
        rpc_call_setup(task, &msg, 0);
 }
 
@@ -2944,7 +2947,7 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
        struct nfs4_delegreturndata *data = calldata;
        data->rpc_status = task->tk_status;
        if (data->rpc_status == 0)
-               renew_lease(data->server, data->timestamp);
+               renew_lease(data->res.server, data->timestamp);
 }
 
 static void nfs4_delegreturn_release(void *calldata)
@@ -2964,6 +2967,7 @@ const static struct rpc_call_ops nfs4_delegreturn_ops = {
 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
 {
        struct nfs4_delegreturndata *data;
+       struct nfs_server *server = NFS_SERVER(inode);
        struct rpc_task *task;
        int status;
 
@@ -2972,11 +2976,13 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co
                return -ENOMEM;
        data->args.fhandle = &data->fh;
        data->args.stateid = &data->stateid;
+       data->args.bitmask = server->attr_bitmask;
        nfs_copy_fh(&data->fh, NFS_FH(inode));
        memcpy(&data->stateid, stateid, sizeof(data->stateid));
+       data->res.fattr = &data->fattr;
+       data->res.server = server;
        data->cred = get_rpccred(cred);
        data->timestamp = jiffies;
-       data->server = NFS_SERVER(inode);
        data->rpc_status = 0;
 
        task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
@@ -2985,8 +2991,11 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co
                return PTR_ERR(task);
        }
        status = nfs4_wait_for_completion_rpc_task(task);
-       if (status == 0)
+       if (status == 0) {
                status = data->rpc_status;
+               if (status == 0)
+                       nfs_post_op_update_inode(inode, &data->fattr);
+       }
        rpc_release_task(task);
        return status;
 }

diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 5d6bda4..12be1d6 100644 (file)
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -392,9 +392,11 @@ static int nfs_stat_to_errno(int);
                                decode_getattr_maxsz)
 #define NFS4_enc_delegreturn_sz        (compound_encode_hdr_maxsz + \
                                encode_putfh_maxsz + \
-                               encode_delegreturn_maxsz)
+                               encode_delegreturn_maxsz + \
+                               encode_getattr_maxsz)
 #define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \
-                               decode_delegreturn_maxsz)
+                               decode_delegreturn_maxsz + \
+                               decode_getattr_maxsz)
 #define NFS4_enc_getacl_sz     (compound_encode_hdr_maxsz + \
                                encode_putfh_maxsz + \
                                encode_getattr_maxsz)
@@ -1983,14 +1985,20 @@ static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const str
 {
        struct xdr_stream xdr;
        struct compound_hdr hdr = {
-               .nops = 2,
+               .nops = 3,
        };
        int status;
 
        xdr_init_encode(&xdr, &req->rq_snd_buf, p);
        encode_compound_hdr(&xdr, &hdr);
-       if ((status = encode_putfh(&xdr, args->fhandle)) == 0)
-               status = encode_delegreturn(&xdr, args->stateid);
+       status = encode_putfh(&xdr, args->fhandle);
+       if (status != 0)
+               goto out;
+       status = encode_delegreturn(&xdr, args->stateid);
+       if (status != 0)
+               goto out;
+       status = encode_getfattr(&xdr, args->bitmask);
+out:
        return status;
 }
 
@@ -4184,7 +4192,7 @@ static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, s
 /*
  * DELEGRETURN request
  */
-static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)
+static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_delegreturnres *res)
 {
        struct xdr_stream xdr;
        struct compound_hdr hdr;
@@ -4192,11 +4200,14 @@ static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *d
 
        xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
        status = decode_compound_hdr(&xdr, &hdr);
-       if (status == 0) {
-               status = decode_putfh(&xdr);
-               if (status == 0)
-                       status = decode_delegreturn(&xdr);
-       }
+       if (status != 0)
+               goto out;
+       status = decode_putfh(&xdr);
+       if (status != 0)
+               goto out;
+       status = decode_delegreturn(&xdr);
+       decode_getfattr(&xdr, res->fattr, res->server);
+out:
        return status;
 }
 

diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 9f422fd..6d6f69e 100644 (file)
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -220,6 +220,12 @@ struct nfs_lockt_res {
 struct nfs4_delegreturnargs {
        const struct nfs_fh *fhandle;
        const nfs4_stateid *stateid;
+       const u32 * bitmask;
+};
+
+struct nfs4_delegreturnres {
+       struct nfs_fattr * fattr;
+       const struct nfs_server *server;
 };
 
 /*