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NFS: Add secinfo procedure

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This patch adds the nfs4 operation secinfo as a
valid nfs rpc operation.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Bryan Schumaker
2011-03-24 17:12:29 +00:00
committed by Trond Myklebust
parent 7c5130588d
commit 5a5ea0d485
4 changed files with 208 additions and 0 deletions
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135
fs/nfs/nfs4xdr.c
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@@ -46,6 +46,7 @@
#include <linux/kdev_t.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/gss_api.h>
#include <linux/nfs.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
@@ -253,6 +254,8 @@ static int nfs4_stat_to_errno(int);
(encode_getattr_maxsz)
#define decode_fs_locations_maxsz \
(0)
#define encode_secinfo_maxsz (op_encode_hdr_maxsz + nfs4_name_maxsz)
#define decode_secinfo_maxsz (op_decode_hdr_maxsz + 4 + (NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)))
#if defined(CONFIG_NFS_V4_1)
#define NFS4_MAX_MACHINE_NAME_LEN (64)
@@ -676,6 +679,14 @@ static int nfs4_stat_to_errno(int);
decode_putfh_maxsz + \
decode_lookup_maxsz + \
decode_fs_locations_maxsz)
#define NFS4_enc_secinfo_sz (compound_encode_hdr_maxsz + \
encode_sequence_maxsz + \
encode_putfh_maxsz + \
encode_secinfo_maxsz)
#define NFS4_dec_secinfo_sz (compound_decode_hdr_maxsz + \
decode_sequence_maxsz + \
decode_putfh_maxsz + \
decode_secinfo_maxsz)
#if defined(CONFIG_NFS_V4_1)
#define NFS4_enc_exchange_id_sz \
(compound_encode_hdr_maxsz + \
@@ -1620,6 +1631,18 @@ static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *state
hdr->replen += decode_delegreturn_maxsz;
}
static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
int len = name->len;
__be32 *p;
p = reserve_space(xdr, 8 + len);
*p++ = cpu_to_be32(OP_SECINFO);
xdr_encode_opaque(p, name->name, len);
hdr->nops++;
hdr->replen += decode_secinfo_maxsz;
}
#if defined(CONFIG_NFS_V4_1)
/* NFSv4.1 operations */
static void encode_exchange_id(struct xdr_stream *xdr,
@@ -2465,6 +2488,24 @@ static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
encode_nops(&hdr);
}
/*
* Encode SECINFO request
*/
static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,
struct xdr_stream *xdr,
struct nfs4_secinfo_arg *args)
{
struct compound_hdr hdr = {
.minorversion = nfs4_xdr_minorversion(&args->seq_args),
};
encode_compound_hdr(xdr, req, &hdr);
encode_sequence(xdr, &args->seq_args, &hdr);
encode_putfh(xdr, args->dir_fh, &hdr);
encode_secinfo(xdr, args->name, &hdr);
encode_nops(&hdr);
}
#if defined(CONFIG_NFS_V4_1)
/*
* EXCHANGE_ID request
@@ -4680,6 +4721,73 @@ static int decode_delegreturn(struct xdr_stream *xdr)
return decode_op_hdr(xdr, OP_DELEGRETURN);
}
static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)
{
__be32 *p;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
flavor->gss.sec_oid4.len = be32_to_cpup(p);
if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)
goto out_err;
p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);
if (unlikely(!p))
goto out_overflow;
memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);
p = xdr_inline_decode(xdr, 8);
if (unlikely(!p))
goto out_overflow;
flavor->gss.qop4 = be32_to_cpup(p++);
flavor->gss.service = be32_to_cpup(p);
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
out_err:
return -EINVAL;
}
static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
{
struct nfs4_secinfo_flavor *sec_flavor;
int status;
__be32 *p;
int i;
status = decode_op_hdr(xdr, OP_SECINFO);
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
res->flavors->num_flavors = be32_to_cpup(p);
for (i = 0; i < res->flavors->num_flavors; i++) {
sec_flavor = &res->flavors->flavors[i];
if ((char *)&sec_flavor[1] - (char *)res > PAGE_SIZE)
break;
p = xdr_inline_decode(xdr, 4);
if (unlikely(!p))
goto out_overflow;
sec_flavor->flavor = be32_to_cpup(p);
if (sec_flavor->flavor == RPC_AUTH_GSS) {
if (decode_secinfo_gss(xdr, sec_flavor))
break;
}
}
return 0;
out_overflow:
print_overflow_msg(__func__, xdr);
return -EIO;
}
#if defined(CONFIG_NFS_V4_1)
static int decode_exchange_id(struct xdr_stream *xdr,
struct nfs41_exchange_id_res *res)
@@ -5919,6 +6027,32 @@ out:
return status;
}
/*
* Decode SECINFO response
*/
static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,
struct xdr_stream *xdr,
struct nfs4_secinfo_res *res)
{
struct compound_hdr hdr;
int status;
status = decode_compound_hdr(xdr, &hdr);
if (status)
goto out;
status = decode_sequence(xdr, &res->seq_res, rqstp);
if (status)
goto out;
status = decode_putfh(xdr);
if (status)
goto out;
status = decode_secinfo(xdr, res);
if (status)
goto out;
out:
return status;
}
#if defined(CONFIG_NFS_V4_1)
/*
* Decode EXCHANGE_ID response
@@ -6258,6 +6392,7 @@ struct rpc_procinfo nfs4_procedures[] = {
PROC(SETACL, enc_setacl, dec_setacl),
PROC(FS_LOCATIONS, enc_fs_locations, dec_fs_locations),
PROC(RELEASE_LOCKOWNER, enc_release_lockowner, dec_release_lockowner),
PROC(SECINFO, enc_secinfo, dec_secinfo),
#if defined(CONFIG_NFS_V4_1)
PROC(EXCHANGE_ID, enc_exchange_id, dec_exchange_id),
PROC(CREATE_SESSION, enc_create_session, dec_create_session),