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Revert "nfsd4: distinguish expired from stale stateids"

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This reverts commit 78155ed75f.

We're depending here on the boot time that we use to generate the
stateid being monotonic, but get_seconds() is not necessarily.

We still depend at least on boot_time being different every time, but
that is a safer bet.

We have a few reports of errors that might be explained by this problem,
though we haven't been able to confirm any of them.

But the minor gain of distinguishing expired from stale errors seems not
worth the risk.

Conflicts:

	fs/nfsd/nfs4state.c

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
J. Bruce Fields 2010-04-22 16:21:39 -04:00
parent 47cee541a4
commit e4e83ea47b
1 changed files with 11 additions and 45 deletions
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56
fs/nfsd/nfs4state.c
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@ -190,7 +190,7 @@ alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_f
dp->dl_vfs_file = stp->st_vfs_file;
dp->dl_type = type;
dp->dl_ident = cb->cb_ident;
dp->dl_stateid.si_boot = get_seconds();
dp->dl_stateid.si_boot = boot_time;
dp->dl_stateid.si_stateownerid = current_delegid++;
dp->dl_stateid.si_fileid = 0;
dp->dl_stateid.si_generation = 0;
@ -1884,7 +1884,7 @@ init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *
stp->st_stateowner = sop;
get_nfs4_file(fp);
stp->st_file = fp;
stp->st_stateid.si_boot = get_seconds();
stp->st_stateid.si_boot = boot_time;
stp->st_stateid.si_stateownerid = sop->so_id;
stp->st_stateid.si_fileid = fp->fi_id;
stp->st_stateid.si_generation = 0;
@ -2733,39 +2733,11 @@ nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp)
static int
STALE_STATEID(stateid_t *stateid)
{
if (time_after((unsigned long)boot_time,
(unsigned long)stateid->si_boot)) {
dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
STATEID_VAL(stateid));
return 1;
}
return 0;
}
static int
EXPIRED_STATEID(stateid_t *stateid)
{
if (time_before((unsigned long)boot_time,
((unsigned long)stateid->si_boot)) &&
time_before((unsigned long)(stateid->si_boot + nfsd4_lease), get_seconds())) {
dprintk("NFSD: expired stateid " STATEID_FMT "!\n",
STATEID_VAL(stateid));
return 1;
}
return 0;
}
static __be32
stateid_error_map(stateid_t *stateid)
{
if (STALE_STATEID(stateid))
return nfserr_stale_stateid;
if (EXPIRED_STATEID(stateid))
return nfserr_expired;
dprintk("NFSD: bad stateid " STATEID_FMT "!\n",
if (stateid->si_boot == boot_time)
return 0;
dprintk("NFSD: stale stateid " STATEID_FMT "!\n",
STATEID_VAL(stateid));
return nfserr_bad_stateid;
return 1;
}
static inline int
@ -2889,10 +2861,8 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
status = nfserr_bad_stateid;
if (is_delegation_stateid(stateid)) {
dp = find_delegation_stateid(ino, stateid);
if (!dp) {
status = stateid_error_map(stateid);
if (!dp)
goto out;
}
status = check_stateid_generation(stateid, &dp->dl_stateid,
flags);
if (status)
@ -2905,10 +2875,8 @@ nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
*filpp = dp->dl_vfs_file;
} else { /* open or lock stateid */
stp = find_stateid(stateid, flags);
if (!stp) {
status = stateid_error_map(stateid);
if (!stp)
goto out;
}
if (nfs4_check_fh(current_fh, stp))
goto out;
if (!stp->st_stateowner->so_confirmed)
@ -2980,7 +2948,7 @@ nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid,
*/
sop = search_close_lru(stateid->si_stateownerid, flags);
if (sop == NULL)
return stateid_error_map(stateid);
return nfserr_bad_stateid;
*sopp = sop;
goto check_replay;
}
@ -3247,10 +3215,8 @@ nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
if (!is_delegation_stateid(stateid))
goto out;
dp = find_delegation_stateid(inode, stateid);
if (!dp) {
status = stateid_error_map(stateid);
if (!dp)
goto out;
}
status = check_stateid_generation(stateid, &dp->dl_stateid, flags);
if (status)
goto out;
@ -3476,7 +3442,7 @@ alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struc
stp->st_stateowner = sop;
get_nfs4_file(fp);
stp->st_file = fp;
stp->st_stateid.si_boot = get_seconds();
stp->st_stateid.si_boot = boot_time;
stp->st_stateid.si_stateownerid = sop->so_id;
stp->st_stateid.si_fileid = fp->fi_id;
stp->st_stateid.si_generation = 0;