| Message ID | 1305922380-8162-2-git-send-email-bjschuma@netapp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 05/20/2011 04:12 PM, bjschuma@netapp.com wrote: > From: Bryan Schumaker <bjschuma@netapp.com> > > This operation is used by the client to tell the server to free a > stateid. > > Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> > --- > fs/nfsd/nfs4proc.c | 5 +++ > fs/nfsd/nfs4state.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++ > fs/nfsd/nfs4xdr.c | 32 +++++++++++++++- > fs/nfsd/xdr4.h | 8 ++++ > 4 files changed, 144 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..c8c1cad 100644 > --- a/fs/nfsd/nfs4state.c > +++ b/fs/nfsd/nfs4state.c > @@ -60,9 +60,12 @@ 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 * search_for_delegation(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); > +static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner); > > /* Locking: */ > > @@ -3133,6 +3136,11 @@ static int is_delegation_stateid(stateid_t *stateid) > return stateid->si_fileid == 0; > } > > +static int is_open_stateid(struct nfs4_stateid *stateid) > +{ > + return stateid->st_openstp == NULL; > +} > + > /* > * Checks for stateid operations > */ > @@ -3212,6 +3220,53 @@ out: > return status; > } > > +static __be32 > +nfsd4_free_delegation_stateid(stateid_t *stateid) > +{ > + struct nfs4_delegation *dp = search_for_delegation(stateid); > + if (dp) > + return nfserr_locks_held; > + return nfserr_bad_stateid; > +} > + > +static __be32 > +nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stateid *stp) > +{ > + if (check_for_locks(stp->st_file, stp->st_stateowner)) I'm not sure if stateids are unique to (file, stateowner), but I'm not sure how else to check for locks at the moment. > + return nfserr_locks_held; > + release_lock_stateid(stp); > + return nfs_ok; > +} > + > +/* > + * Free a state id > + */ > +__be32 > +nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, > + struct nfsd4_free_stateid *free_stateid) > +{ > + stateid_t *stateid = &free_stateid->fr_stateid; > + struct nfs4_stateid *stp; > + > + if (is_delegation_stateid(stateid)) > + return nfsd4_free_delegation_stateid(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 (is_open_stateid(stp)) > + return nfserr_locks_held; > + else > + return nfsd4_free_lock_stateid(stateid, stp); > +} > + > static inline int > setlkflg (int type) > { > @@ -3590,6 +3645,14 @@ static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; > static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; > static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; > > +static int > +same_stateid(stateid_t *id_one, stateid_t *id_two) > +{ > + if (id_one->si_stateownerid != id_two->si_stateownerid) > + return 0; > + return id_one->si_fileid == id_two->si_fileid; > +} > + > static struct nfs4_stateid * > find_stateid(stateid_t *stid, int flags) > { > @@ -3619,6 +3682,44 @@ find_stateid(stateid_t *stid, int flags) > return NULL; > } > > +static struct nfs4_stateid * > +search_for_stateid(stateid_t *stid) > +{ > + struct nfs4_stateid *local; > + unsigned int hashval = stateid_hashval(stid->si_stateownerid, stid->si_fileid); > + > + list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { > + if (same_stateid(&local->st_stateid, stid)) > + return local; > + } > + > + list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { > + if (same_stateid(&local->st_stateid, stid)) > + return local; > + } > + return NULL; > +} > + > +static struct nfs4_delegation * > +search_for_delegation(stateid_t *stid) > +{ > + struct nfs4_file *fp; > + struct nfs4_delegation *dp; > + struct list_head *pos; > + int i; > + > + for (i = 0; i < FILE_HASH_SIZE; i++) { > + list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { > + list_for_each(pos, &fp->fi_delegations) { > + dp = list_entry(pos, struct nfs4_delegation, dl_perfile); > + if (same_stateid(&dp->dl_stateid, stid)) > + return dp; > + } > + } > + } > + 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 > > /* -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, May 20, 2011 at 04:16:18PM -0400, Bryan Schumaker wrote: > On 05/20/2011 04:12 PM, bjschuma@netapp.com wrote: > > From: Bryan Schumaker <bjschuma@netapp.com> > > +static __be32 > > +nfsd4_free_delegation_stateid(stateid_t *stateid) > > +{ > > + struct nfs4_delegation *dp = search_for_delegation(stateid); > > + if (dp) > > + return nfserr_locks_held; > > + return nfserr_bad_stateid; > > +} > > + > > +static __be32 > > +nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stateid *stp) > > +{ > > + if (check_for_locks(stp->st_file, stp->st_stateowner)) > > I'm not sure if stateids are unique to (file, stateowner), but I'm not sure how else to check for locks at the moment. Actually, looking... there's a one-to-one lockowner<->lockstateid correspondance. Which is dumb. The server's handling of lock state needs more serious help than I realized! I think your patch is OK now, though. --b. -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 05/25/2011 11:05 AM, J. Bruce Fields wrote: > On Fri, May 20, 2011 at 04:16:18PM -0400, Bryan Schumaker wrote: >> On 05/20/2011 04:12 PM, bjschuma@netapp.com wrote: >>> From: Bryan Schumaker <bjschuma@netapp.com> >>> +static __be32 >>> +nfsd4_free_delegation_stateid(stateid_t *stateid) >>> +{ >>> + struct nfs4_delegation *dp = search_for_delegation(stateid); >>> + if (dp) >>> + return nfserr_locks_held; >>> + return nfserr_bad_stateid; >>> +} >>> + >>> +static __be32 >>> +nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stateid *stp) >>> +{ >>> + if (check_for_locks(stp->st_file, stp->st_stateowner)) >> >> I'm not sure if stateids are unique to (file, stateowner), but I'm not sure how else to check for locks at the moment. > > Actually, looking... there's a one-to-one lockowner<->lockstateid > correspondance. Which is dumb. > > The server's handling of lock state needs more serious help than I > realized! > > I think your patch is OK now, though. Thanks for the reviews! > > --b. > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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..c8c1cad 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -60,9 +60,12 @@ 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 * search_for_delegation(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); +static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner); /* Locking: */ @@ -3133,6 +3136,11 @@ static int is_delegation_stateid(stateid_t *stateid) return stateid->si_fileid == 0; } +static int is_open_stateid(struct nfs4_stateid *stateid) +{ + return stateid->st_openstp == NULL; +} + /* * Checks for stateid operations */ @@ -3212,6 +3220,53 @@ out: return status; } +static __be32 +nfsd4_free_delegation_stateid(stateid_t *stateid) +{ + struct nfs4_delegation *dp = search_for_delegation(stateid); + if (dp) + return nfserr_locks_held; + return nfserr_bad_stateid; +} + +static __be32 +nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stateid *stp) +{ + if (check_for_locks(stp->st_file, stp->st_stateowner)) + return nfserr_locks_held; + release_lock_stateid(stp); + return nfs_ok; +} + +/* + * Free a state id + */ +__be32 +nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, + struct nfsd4_free_stateid *free_stateid) +{ + stateid_t *stateid = &free_stateid->fr_stateid; + struct nfs4_stateid *stp; + + if (is_delegation_stateid(stateid)) + return nfsd4_free_delegation_stateid(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 (is_open_stateid(stp)) + return nfserr_locks_held; + else + return nfsd4_free_lock_stateid(stateid, stp); +} + static inline int setlkflg (int type) { @@ -3590,6 +3645,14 @@ static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; +static int +same_stateid(stateid_t *id_one, stateid_t *id_two) +{ + if (id_one->si_stateownerid != id_two->si_stateownerid) + return 0; + return id_one->si_fileid == id_two->si_fileid; +} + static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags) { @@ -3619,6 +3682,44 @@ find_stateid(stateid_t *stid, int flags) return NULL; } +static struct nfs4_stateid * +search_for_stateid(stateid_t *stid) +{ + struct nfs4_stateid *local; + unsigned int hashval = stateid_hashval(stid->si_stateownerid, stid->si_fileid); + + list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { + if (same_stateid(&local->st_stateid, stid)) + return local; + } + + list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { + if (same_stateid(&local->st_stateid, stid)) + return local; + } + return NULL; +} + +static struct nfs4_delegation * +search_for_delegation(stateid_t *stid) +{ + struct nfs4_file *fp; + struct nfs4_delegation *dp; + struct list_head *pos; + int i; + + for (i = 0; i < FILE_HASH_SIZE; i++) { + list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { + list_for_each(pos, &fp->fi_delegations) { + dp = list_entry(pos, struct nfs4_delegation, dl_perfile); + if (same_stateid(&dp->dl_stateid, stid)) + return dp; + } + } + } + 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 /*