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nfsd4: split preprocess_seqid, cleanup 

Move most of this into helper functions.  Also move the non-CONFIRM case
into caller, providing a helper function for that purpose.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
J. Bruce Fields 2011-09-06 15:19:46 -04:00
parent 4d71ab8751
commit c0a5d93efb
2 changed files with 45 additions and 43 deletions
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87
fs/nfsd/nfs4state.c
View File

@ -3253,7 +3253,6 @@ __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session)
if (!stp)
goto out;
status = nfserr_bad_stateid;
if (stp->st_stateowner->so_is_open_owner
&& !openowner(stp->st_stateowner)->oo_confirmed)
goto out;
@ -3418,6 +3417,29 @@ setlkflg (int type)
RD_STATE : WR_STATE;
}
static __be32 nfs4_nospecial_stateid_checks(stateid_t *stateid)
{
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid))
return nfserr_bad_stateid;
if (STALE_STATEID(stateid))
return nfserr_stale_stateid;
return nfs_ok;
}
static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_stateid *stp)
{
struct svc_fh *current_fh = &cstate->current_fh;
struct nfs4_stateowner *sop = stp->st_stateowner;
__be32 status;
if (nfs4_check_fh(current_fh, stp))
return nfserr_bad_stateid;
status = nfsd4_check_seqid(cstate, sop, seqid);
if (status)
return status;
return check_stateid_generation(stateid, &stp->st_stateid, nfsd4_has_session(cstate));
}
/*
* Checks for sequence id mutating operations.
*/
@ -3426,54 +3448,36 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
stateid_t *stateid, int flags,
struct nfs4_stateid **stpp)
{
struct nfs4_stateowner *sop;
struct svc_fh *current_fh = &cstate->current_fh;
__be32 status;
dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__,
seqid, STATEID_VAL(stateid));
*stpp = NULL;
if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) {
dprintk("NFSD: preprocess_seqid_op: magic stateid!\n");
return nfserr_bad_stateid;
}
if (STALE_STATEID(stateid))
return nfserr_stale_stateid;
/*
* We return BAD_STATEID if filehandle doesn't match stateid,
* the confirmed flag is incorrecly set, or the generation
* number is incorrect.
*/
status = nfs4_nospecial_stateid_checks(stateid);
if (status)
return status;
*stpp = find_stateid_by_type(stateid, flags);
if (*stpp == NULL)
return nfserr_expired;
cstate->replay_owner = (*stpp)->st_stateowner;
renew_client((*stpp)->st_stateowner->so_client);
sop = (*stpp)->st_stateowner;
cstate->replay_owner = sop;
return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp);
}
if (nfs4_check_fh(current_fh, *stpp)) {
dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n");
return nfserr_bad_stateid;
}
static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_stateid **stpp)
{
__be32 status;
struct nfs4_openowner *oo;
status = nfsd4_check_seqid(cstate, sop, seqid);
status = nfs4_preprocess_seqid_op(cstate, seqid, stateid,
OPEN_STATE, stpp);
if (status)
return status;
if (sop->so_is_open_owner && !openowner(sop)->oo_confirmed
&& !(flags & CONFIRM)) {
dprintk("NFSD: preprocess_seqid_op: stateowner not"
" confirmed yet!\n");
oo = openowner((*stpp)->st_stateowner);
if (!oo->oo_confirmed)
return nfserr_bad_stateid;
}
status = check_stateid_generation(stateid, &(*stpp)->st_stateid, nfsd4_has_session(cstate));
if (status)
return status;
renew_client(sop->so_client);
return nfs_ok;
}
@ -3497,7 +3501,7 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
status = nfs4_preprocess_seqid_op(cstate,
oc->oc_seqid, &oc->oc_req_stateid,
CONFIRM | OPEN_STATE, &stp);
OPEN_STATE, &stp);
if (status)
goto out;
oo = openowner(stp->st_stateowner);
@ -3557,8 +3561,8 @@ nfsd4_open_downgrade(struct svc_rqst *rqstp,
return nfserr_inval;
nfs4_lock_state();
status = nfs4_preprocess_seqid_op(cstate, od->od_seqid,
&od->od_stateid, OPEN_STATE, &stp);
status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid,
&od->od_stateid, &stp);
if (status)
goto out;
status = nfserr_inval;
@ -3602,9 +3606,8 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
nfs4_lock_state();
/* check close_lru for replay */
status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid,
&close->cl_stateid,
OPEN_STATE, &stp);
status = nfs4_preprocess_confirmed_seqid_op(cstate, close->cl_seqid,
&close->cl_stateid, &stp);
if (stp == NULL && status == nfserr_expired) {
/*
* Also, we should make sure this isn't just the result of
@ -3963,10 +3966,10 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
goto out;
/* validate and update open stateid and open seqid */
status = nfs4_preprocess_seqid_op(cstate,
status = nfs4_preprocess_confirmed_seqid_op(cstate,
lock->lk_new_open_seqid,
&lock->lk_new_open_stateid,
OPEN_STATE, &open_stp);
&open_stp);
if (status)
goto out;
open_sop = openowner(open_stp->st_stateowner);

1
fs/nfsd/state.h
View File

@ -463,7 +463,6 @@ struct nfs4_stateid {
};
/* flags for preprocess_seqid_op() */
#define CONFIRM 0x00000002
#define OPEN_STATE 0x00000004
#define LOCK_STATE 0x00000008
#define RD_STATE 0x00000010