summaryrefslogtreecommitdiff
path: root/fs/nfsd/nfs4idmap.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfsd/nfs4idmap.c')
-rw-r--r--fs/nfsd/nfs4idmap.c42
1 files changed, 22 insertions, 20 deletions
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index c0dfde68742e..a0ab0a847d69 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -551,44 +551,43 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen
return 0;
}
-static __be32 encode_ascii_id(u32 id, __be32 **p, int *buflen)
+static __be32 encode_ascii_id(struct xdr_stream *xdr, u32 id)
{
char buf[11];
int len;
- int bytes;
+ __be32 *p;
len = sprintf(buf, "%u", id);
- bytes = 4 + (XDR_QUADLEN(len) << 2);
- if (bytes > *buflen)
+ p = xdr_reserve_space(xdr, len + 4);
+ if (!p)
return nfserr_resource;
- *p = xdr_encode_opaque(*p, buf, len);
- *buflen -= bytes;
+ p = xdr_encode_opaque(p, buf, len);
return 0;
}
-static __be32 idmap_id_to_name(struct svc_rqst *rqstp, int type, u32 id, __be32 **p, int *buflen)
+static __be32 idmap_id_to_name(struct xdr_stream *xdr,
+ struct svc_rqst *rqstp, int type, u32 id)
{
struct ent *item, key = {
.id = id,
.type = type,
};
+ __be32 *p;
int ret;
- int bytes;
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
ret = idmap_lookup(rqstp, idtoname_lookup, &key, nn->idtoname_cache, &item);
if (ret == -ENOENT)
- return encode_ascii_id(id, p, buflen);
+ return encode_ascii_id(xdr, id);
if (ret)
return nfserrno(ret);
ret = strlen(item->name);
WARN_ON_ONCE(ret > IDMAP_NAMESZ);
- bytes = 4 + (XDR_QUADLEN(ret) << 2);
- if (bytes > *buflen)
+ p = xdr_reserve_space(xdr, ret + 4);
+ if (!p)
return nfserr_resource;
- *p = xdr_encode_opaque(*p, item->name, ret);
- *buflen -= bytes;
+ p = xdr_encode_opaque(p, item->name, ret);
cache_put(&item->h, nn->idtoname_cache);
return 0;
}
@@ -622,11 +621,12 @@ do_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, u
return idmap_name_to_id(rqstp, type, name, namelen, id);
}
-static __be32 encode_name_from_id(struct svc_rqst *rqstp, int type, u32 id, __be32 **p, int *buflen)
+static __be32 encode_name_from_id(struct xdr_stream *xdr,
+ struct svc_rqst *rqstp, int type, u32 id)
{
if (nfs4_disable_idmapping && rqstp->rq_cred.cr_flavor < RPC_AUTH_GSS)
- return encode_ascii_id(id, p, buflen);
- return idmap_id_to_name(rqstp, type, id, p, buflen);
+ return encode_ascii_id(xdr, id);
+ return idmap_id_to_name(xdr, rqstp, type, id);
}
__be32
@@ -655,14 +655,16 @@ nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen,
return status;
}
-__be32 nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t uid, __be32 **p, int *buflen)
+__be32 nfsd4_encode_user(struct xdr_stream *xdr, struct svc_rqst *rqstp,
+ kuid_t uid)
{
u32 id = from_kuid(&init_user_ns, uid);
- return encode_name_from_id(rqstp, IDMAP_TYPE_USER, id, p, buflen);
+ return encode_name_from_id(xdr, rqstp, IDMAP_TYPE_USER, id);
}
-__be32 nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t gid, __be32 **p, int *buflen)
+__be32 nfsd4_encode_group(struct xdr_stream *xdr, struct svc_rqst *rqstp,
+ kgid_t gid)
{
u32 id = from_kgid(&init_user_ns, gid);
- return encode_name_from_id(rqstp, IDMAP_TYPE_GROUP, id, p, buflen);
+ return encode_name_from_id(xdr, rqstp, IDMAP_TYPE_GROUP, id);
}