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nfsd: Move create_client() call outside the lock 

For efficiency reasons, and because we want to use spin locks instead
of relying on the client_mutex.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust 2014-07-30 08:27:05 -04:00 committed by J. Bruce Fields
parent 425510f5c8
commit 5cc40fd7b6
1 changed files with 19 additions and 16 deletions
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35
fs/nfsd/nfs4state.c
View File

@ -2181,6 +2181,10 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
return nfserr_encr_alg_unsupp;
}
new = create_client(exid->clname, rqstp, &verf);
if (new == NULL)
return nfserr_jukebox;
/* Cases below refer to rfc 5661 section 18.35.4: */
nfs4_lock_state();
conf = find_confirmed_client_by_name(&exid->clname, nn);
@ -2207,7 +2211,6 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
}
/* case 6 */
exid->flags |= EXCHGID4_FLAG_CONFIRMED_R;
new = conf;
goto out_copy;
}
if (!creds_match) { /* case 3 */
@ -2220,7 +2223,6 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
}
if (verfs_match) { /* case 2 */
conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
new = conf;
goto out_copy;
}
/* case 5, client reboot */
@ -2238,29 +2240,28 @@ nfsd4_exchange_id(struct svc_rqst *rqstp,
/* case 1 (normal case) */
out_new:
new = create_client(exid->clname, rqstp, &verf);
if (new == NULL) {
status = nfserr_jukebox;
goto out;
}
new->cl_minorversion = cstate->minorversion;
new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED);
gen_clid(new, nn);
add_to_unconfirmed(new);
conf = new;
new = NULL;
out_copy:
exid->clientid.cl_boot = new->cl_clientid.cl_boot;
exid->clientid.cl_id = new->cl_clientid.cl_id;
exid->clientid.cl_boot = conf->cl_clientid.cl_boot;
exid->clientid.cl_id = conf->cl_clientid.cl_id;
exid->seqid = new->cl_cs_slot.sl_seqid + 1;
nfsd4_set_ex_flags(new, exid);
exid->seqid = conf->cl_cs_slot.sl_seqid + 1;
nfsd4_set_ex_flags(conf, exid);
dprintk("nfsd4_exchange_id seqid %d flags %x\n",
new->cl_cs_slot.sl_seqid, new->cl_exchange_flags);
conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags);
status = nfs_ok;
out:
nfs4_unlock_state();
if (new)
free_client(new);
return status;
}
@ -2903,6 +2904,9 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
__be32 status;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
new = create_client(clname, rqstp, &clverifier);
if (new == NULL)
return nfserr_jukebox;
/* Cases below refer to rfc 3530 section 14.2.33: */
nfs4_lock_state();
conf = find_confirmed_client_by_name(&clname, nn);
@ -2923,10 +2927,6 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
unconf = find_unconfirmed_client_by_name(&clname, nn);
if (unconf)
expire_client(unconf);
status = nfserr_jukebox;
new = create_client(clname, rqstp, &clverifier);
if (new == NULL)
goto out;
if (conf && same_verf(&conf->cl_verifier, &clverifier))
/* case 1: probable callback update */
copy_clid(new, conf);
@ -2938,9 +2938,12 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
new = NULL;
status = nfs_ok;
out:
nfs4_unlock_state();
if (new)
free_client(new);
return status;
}