Return-Path: Received: from mx2.netapp.com ([216.240.18.37]:59513 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756653Ab1EFQuM (ORCPT ); Fri, 6 May 2011 12:50:12 -0400 From: bjschuma@netapp.com To: Trond.Myklebust@netapp.com Cc: linux-nfs@vger.kernel.org, Bryan Schumaker Subject: [PATCH 1/3] NFS: Added TEST_STATEID call Date: Fri, 6 May 2011 12:49:53 -0400 Message-Id: <1304700595-5040-1-git-send-email-bjschuma@netapp.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Content-Type: text/plain MIME-Version: 1.0 From: Bryan Schumaker This patch adds in the xdr for doing a TEST_STATEID call with a single stateid. RFC 5661 allows multiple stateids to be tested in a single call, but only testing one keeps things simpler for now. Signed-off-by: Bryan Schumaker --- fs/nfs/nfs4proc.c | 28 ++++++++++++++ fs/nfs/nfs4xdr.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/nfs4.h | 1 + include/linux/nfs_xdr.h | 10 +++++ 4 files changed, 130 insertions(+), 0 deletions(-) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 69c0f3c..044c151 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -5791,6 +5791,34 @@ out: rpc_put_task(task); return status; } +static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state) +{ + int status; + struct nfs41_test_stateid_args args = { + .stateid = &state->stateid, + }; + struct nfs41_test_stateid_res res; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], + .rpc_argp = &args, + .rpc_resp = &res, + }; + args.seq_args.sa_session = res.seq_res.sr_session = NULL; + status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1); + return status; +} + +static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state) +{ + struct nfs4_exception exception = { }; + int err; + do { + err = nfs4_handle_exception(server, + _nfs41_test_stateid(server, state), + &exception); + } while (exception.retry); + return err; +} #endif /* CONFIG_NFS_V4_1 */ struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index c3ccd2c..2746616 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -338,6 +338,9 @@ static int nfs4_stat_to_errno(int); 1 /* layoutupdate4 layout type */ + \ 1 /* NULL filelayout layoutupdate4 payload */) #define decode_layoutcommit_maxsz (op_decode_hdr_maxsz + 3) +#define encode_test_stateid_maxsz (op_encode_hdr_maxsz + 8 + \ + XDR_QUADLEN(NFS4_STATEID_SIZE)) +#define decode_test_stateid_maxsz (op_decode_hdr_maxsz + 8 + 4) #else /* CONFIG_NFS_V4_1 */ #define encode_sequence_maxsz 0 @@ -760,6 +763,12 @@ static int nfs4_stat_to_errno(int); decode_putfh_maxsz + \ decode_layoutcommit_maxsz + \ decode_getattr_maxsz) +#define NFS4_enc_test_stateid_sz (compound_encode_hdr_maxsz + \ + encode_sequence_maxsz + \ + encode_test_stateid_maxsz) +#define NFS4_dec_test_stateid_sz (compound_decode_hdr_maxsz + \ + decode_sequence_maxsz + \ + decode_test_stateid_maxsz) const u32 nfs41_maxwrite_overhead = ((RPC_MAX_HEADER_WITH_AUTH + @@ -1889,6 +1898,20 @@ encode_layoutcommit(struct xdr_stream *xdr, hdr->replen += decode_layoutcommit_maxsz; return 0; } + +static void encode_test_stateid(struct xdr_stream *xdr, + struct nfs41_test_stateid_args *args, + struct compound_hdr *hdr) +{ + __be32 *p; + + p = reserve_space(xdr, 8 + NFS4_STATEID_SIZE); + *p++ = cpu_to_be32(OP_TEST_STATEID); + *p++ = cpu_to_be32(1); + xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE); + hdr->nops++; + hdr->replen += decode_test_stateid_maxsz; +} #endif /* CONFIG_NFS_V4_1 */ /* @@ -2722,6 +2745,23 @@ static int nfs4_xdr_enc_layoutcommit(struct rpc_rqst *req, encode_nops(&hdr); return 0; } + +/* + * Encode TEST_STATEID request + */ +static void nfs4_xdr_enc_test_stateid(struct rpc_rqst *req, + struct xdr_stream *xdr, + struct nfs41_test_stateid_args *args) +{ + struct compound_hdr hdr = { + .minorversion = nfs4_xdr_minorversion(&args->seq_args), + }; + + encode_compound_hdr(xdr, req, &hdr); + encode_sequence(xdr, &args->seq_args, &hdr); + encode_test_stateid(xdr, args, &hdr); + encode_nops(&hdr); +} #endif /* CONFIG_NFS_V4_1 */ static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) @@ -5231,6 +5271,35 @@ out_overflow: print_overflow_msg(__func__, xdr); return -EIO; } + +static int decode_test_stateid(struct xdr_stream *xdr, + struct nfs41_test_stateid_res *res) +{ + __be32 *p; + int status; + int num_res; + + status = decode_op_hdr(xdr, OP_TEST_STATEID); + if (status) + return status; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + num_res = be32_to_cpup(p++); + if (num_res != 1) + goto out; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + res->status = be32_to_cpup(p++); + return res->status; +out_overflow: + print_overflow_msg(__func__, xdr); +out: + return -EIO; +} #endif /* CONFIG_NFS_V4_1 */ /* @@ -6346,6 +6415,27 @@ static int nfs4_xdr_dec_layoutcommit(struct rpc_rqst *rqstp, out: return status; } + +/* + * Decode TEST_STATEID response + */ +static int nfs4_xdr_dec_test_stateid(struct rpc_rqst *rqstp, + struct xdr_stream *xdr, + struct nfs41_test_stateid_res *res) +{ + struct compound_hdr hdr; + int status; + + status = decode_compound_hdr(xdr, &hdr); + if (status) + goto out; + status = decode_sequence(xdr, &res->seq_res, rqstp); + if (status) + goto out; + status = decode_test_stateid(xdr, res); +out: + return status; +} #endif /* CONFIG_NFS_V4_1 */ /** @@ -6547,6 +6637,7 @@ struct rpc_procinfo nfs4_procedures[] = { PROC(GETDEVICEINFO, enc_getdeviceinfo, dec_getdeviceinfo), PROC(LAYOUTGET, enc_layoutget, dec_layoutget), PROC(LAYOUTCOMMIT, enc_layoutcommit, dec_layoutcommit), + PROC(TEST_STATEID, enc_test_stateid, dec_test_stateid), #endif /* CONFIG_NFS_V4_1 */ }; diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index 178fafe..0df1eed 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -562,6 +562,7 @@ enum { NFSPROC4_CLNT_LAYOUTGET, NFSPROC4_CLNT_GETDEVICEINFO, NFSPROC4_CLNT_LAYOUTCOMMIT, + NFSPROC4_CLNT_TEST_STATEID, }; /* nfs41 types */ diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 890dce2..36f50dc 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1062,6 +1062,16 @@ struct nfs41_reclaim_complete_args { struct nfs41_reclaim_complete_res { struct nfs4_sequence_res seq_res; }; + +struct nfs41_test_stateid_args { + nfs4_stateid *stateid; + struct nfs4_sequence_args seq_args; +}; + +struct nfs41_test_stateid_res { + unsigned int status; + struct nfs4_sequence_res seq_res; +}; #endif /* CONFIG_NFS_V4_1 */ struct nfs_page; -- 1.7.5.1