Return-Path: Received: from mx2.netapp.com ([216.240.18.37]:2489 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932557Ab1EFS5j (ORCPT ); Fri, 6 May 2011 14:57:39 -0400 From: bjschuma@netapp.com To: bfields@fieldses.org Cc: linux-nfs@vger.kernel.org, Bryan Schumaker Subject: [PATCH 1/2] NFSD: added FREE_STATEID operation Date: Fri, 6 May 2011 14:57:34 -0400 Message-Id: <1304708255-20464-2-git-send-email-bjschuma@netapp.com> In-Reply-To: <1304708255-20464-1-git-send-email-bjschuma@netapp.com> References: <1304708255-20464-1-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 operation is used by the client to tell the server to free a stateid. Signed-off-by: Bryan Schumaker --- fs/nfsd/nfs4proc.c | 5 ++++ fs/nfsd/nfs4state.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++ fs/nfsd/nfs4xdr.c | 32 +++++++++++++++++++++++++++- fs/nfsd/xdr4.h | 8 +++++++ 4 files changed, 99 insertions(+), 2 deletions(-) diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 3a6dbd7..7e00116 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -1412,6 +1412,11 @@ static struct nfsd4_operation nfsd4_ops[] = { .op_flags = OP_HANDLES_WRONGSEC, .op_name = "OP_SECINFO_NO_NAME", }, + [OP_FREE_STATEID] = { + .op_func = (nfsd4op_func)nfsd4_free_stateid, + .op_flags = ALLOWED_WITHOUT_FH, + .op_name = "OP_FREE_STATEID", + }, }; static const char *nfsd4_op_name(unsigned opnum) diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index a2ea14f..6beec13 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -60,6 +60,7 @@ static u64 current_sessionid = 1; /* forward declarations */ static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); +static struct nfs4_stateid * search_for_stateid(stateid_t *stid); static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; static void nfs4_set_recdir(char *recdir); @@ -316,6 +317,12 @@ static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; static struct list_head client_lru; static struct list_head close_lru; +static int +stateid_has_locks(struct nfs4_stateid *stp) +{ + return list_empty(&stp->st_lockowners); +} + /* * We store the NONE, READ, WRITE, and BOTH bits separately in the * st_{access,deny}_bmap field of the stateid, in order to track not @@ -3212,6 +3219,33 @@ out: return status; } +/* + * Free a state id + */ +__be32 +nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + struct nfsd4_free_stateid *free_stateid) +{ + struct nfs4_stateid *stp = NULL; + stateid_t *stateid = &free_stateid->fr_stateid; + + stp = search_for_stateid(stateid); + if (!stp) + return nfserr_bad_stateid; + if (stateid->si_generation != 0) { + if (stateid->si_generation < stp->st_stateid.si_generation) + return nfserr_old_stateid; + if (stateid->si_generation > stp->st_stateid.si_generation) + return nfserr_bad_stateid; + } + + if (stateid_has_locks(stp)) + return nfserr_locks_held; + if (stp) + release_open_stateid(stp); + return nfs_ok; +} + static inline int setlkflg (int type) { @@ -3619,6 +3653,28 @@ find_stateid(stateid_t *stid, int flags) return NULL; } +static struct nfs4_stateid * +search_for_stateid(stateid_t *stid) +{ + struct nfs4_stateid *local; + u32 st_id = stid->si_stateownerid; + u32 f_id = stid->si_fileid; + unsigned int hashval = stateid_hashval(st_id, f_id); + + list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { + if ((local->st_stateid.si_stateownerid == st_id) && + (local->st_stateid.si_fileid == f_id)) + return local; + } + + list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { + if ((local->st_stateid.si_stateownerid == st_id) && + (local->st_stateid.si_fileid == f_id)) + return local; + } + return NULL; +} + static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid) { diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index 195a91d..5da6874 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -1246,6 +1246,19 @@ nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, } static __be32 +nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, + struct nfsd4_free_stateid *free_stateid) +{ + DECODE_HEAD; + + READ_BUF(sizeof(stateid_t)); + READ32(free_stateid->fr_stateid.si_generation); + COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); + + DECODE_TAIL; +} + +static __be32 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, struct nfsd4_sequence *seq) { @@ -1370,7 +1383,7 @@ static nfsd4_dec nfsd41_dec_ops[] = { [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, - [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, + [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, @@ -3115,6 +3128,21 @@ nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, return nfserr; } +static __be32 +nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr, + struct nfsd4_free_stateid *free_stateid) +{ + __be32 *p; + + if (nfserr) + return nfserr; + + RESERVE_SPACE(4); + WRITE32(nfserr); + ADJUST_ARGS(); + return nfserr; +} + __be32 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_sequence *seq) @@ -3196,7 +3224,7 @@ static nfsd4_enc nfsd4_enc_ops[] = { [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, - [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, + [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid, [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index 366401e..ed1784d 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -342,6 +342,11 @@ struct nfsd4_setclientid_confirm { nfs4_verifier sc_confirm; }; +struct nfsd4_free_stateid { + stateid_t fr_stateid; /* request */ + __be32 fr_status; /* response */ +}; + /* also used for NVERIFY */ struct nfsd4_verify { u32 ve_bmval[3]; /* request */ @@ -432,6 +437,7 @@ struct nfsd4_op { struct nfsd4_destroy_session destroy_session; struct nfsd4_sequence sequence; struct nfsd4_reclaim_complete reclaim_complete; + struct nfsd4_free_stateid free_stateid; } u; struct nfs4_replay * replay; }; @@ -564,6 +570,8 @@ extern __be32 nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *, struct nfsd4_delegreturn *dr); extern __be32 nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *, clientid_t *clid); +extern __be32 nfsd4_free_stateid(struct svc_rqst *rqstp, + struct nfsd4_compound_state *, struct nfsd4_free_stateid *free_stateid); #endif /* -- 1.7.5.1