diff options
| -rw-r--r-- | fs/nfsd/export.c | 76 |
1 files changed, 67 insertions, 9 deletions
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c index ac225a79376c..4537a8f5cb9a 100644 --- a/fs/nfsd/export.c +++ b/fs/nfsd/export.c @@ -1229,6 +1229,10 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv, } /* + * 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; + * otherwise, will try to use rq_gssclient. + * * Called from functions that handle requests; functions that do work on * behalf of mountd are passed a single client name to use, and should * use exp_get_by_name() or exp_find(). @@ -1237,29 +1241,83 @@ struct svc_export * rqst_exp_get_by_name(struct svc_rqst *rqstp, struct vfsmount *mnt, struct dentry *dentry) { - struct auth_domain *clp; + struct svc_export *gssexp, *exp = NULL; + + if (rqstp->rq_client == NULL) + goto gss; - clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client; - return exp_get_by_name(clp, mnt, dentry, &rqstp->rq_chandle); + /* First try the auth_unix client: */ + exp = exp_get_by_name(rqstp->rq_client, mnt, dentry, + &rqstp->rq_chandle); + if (PTR_ERR(exp) == -ENOENT) + goto gss; + if (IS_ERR(exp)) + return exp; + /* If it has secinfo, assume there are no gss/... clients */ + if (exp->ex_nflavors > 0) + return exp; +gss: + /* Otherwise, try falling back on gss client */ + if (rqstp->rq_gssclient == NULL) + return exp; + gssexp = exp_get_by_name(rqstp->rq_gssclient, mnt, dentry, + &rqstp->rq_chandle); + if (PTR_ERR(gssexp) == -ENOENT) + return exp; + if (exp && !IS_ERR(exp)) + exp_put(exp); + return gssexp; } struct svc_export * rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv) { - struct auth_domain *clp; + struct svc_export *gssexp, *exp = NULL; + + if (rqstp->rq_client == NULL) + goto gss; - clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client; - return exp_find(clp, fsid_type, fsidv, &rqstp->rq_chandle); + /* First try the auth_unix client: */ + exp = exp_find(rqstp->rq_client, fsid_type, fsidv, &rqstp->rq_chandle); + if (PTR_ERR(exp) == -ENOENT) + goto gss; + if (IS_ERR(exp)) + return exp; + /* If it has secinfo, assume there are no gss/... clients */ + if (exp->ex_nflavors > 0) + return exp; +gss: + /* Otherwise, try falling back on gss client */ + if (rqstp->rq_gssclient == NULL) + return exp; + gssexp = exp_find(rqstp->rq_gssclient, fsid_type, fsidv, + &rqstp->rq_chandle); + if (PTR_ERR(gssexp) == -ENOENT) + return exp; + if (exp && !IS_ERR(exp)) + exp_put(exp); + return gssexp; } struct svc_export * rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt, struct dentry *dentry) { - struct auth_domain *clp; + struct svc_export *exp; - clp = rqstp->rq_gssclient ? rqstp->rq_gssclient : rqstp->rq_client; - return exp_parent(rqstp->rq_client, mnt, dentry, &rqstp->rq_chandle); + dget(dentry); + exp = rqst_exp_get_by_name(rqstp, mnt, dentry); + + while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) { + struct dentry *parent; + + parent = dget_parent(dentry); + dput(dentry); + dentry = parent; + exp = rqst_exp_get_by_name(rqstp, mnt, dentry); + } + dput(dentry); + return exp; } /* |