diff options
Diffstat (limited to 'fs/nfsd/export.c')
| -rw-r--r-- | fs/nfsd/export.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c index 4537a8f5cb9a..323cbdcc9bfd 100644 --- a/fs/nfsd/export.c +++ b/fs/nfsd/export.c @@ -1228,6 +1228,28 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv, return exp; } +__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp) +{ + struct exp_flavor_info *f; + struct exp_flavor_info *end = exp->ex_flavors + exp->ex_nflavors; + + /* legacy gss-only clients are always OK: */ + if (exp->ex_client == rqstp->rq_gssclient) + return 0; + /* ip-address based client; check sec= export option: */ + for (f = exp->ex_flavors; f < end; f++) { + if (f->pseudoflavor == rqstp->rq_flavor) + return 0; + } + /* defaults in absence of sec= options: */ + if (exp->ex_nflavors == 0) { + if (rqstp->rq_flavor == RPC_AUTH_NULL || + rqstp->rq_flavor == RPC_AUTH_UNIX) + return 0; + } + return nfserr_wrongsec; +} + /* * Uses rq_client and rq_gssclient to find an export; uses rq_client (an * auth_unix client) if it's available and has secinfo information; @@ -1340,6 +1362,10 @@ exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp) if (IS_ERR(exp)) return nfserrno(PTR_ERR(exp)); rv = fh_compose(fhp, exp, exp->ex_dentry, NULL); + if (rv) + goto out; + rv = check_nfsd_access(exp, rqstp); +out: exp_put(exp); return rv; } |