Modernize and harden the code path that constructs each RPC Call
message.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
include/linux/sunrpc/auth.h | 15 ++-
include/linux/sunrpc/xdr.h | 6 +
include/trace/events/sunrpc.h | 29 ++++++
net/sunrpc/auth.c | 56 ++++++++----
net/sunrpc/auth_gss/auth_gss.c | 191 +++++++++++++++++++---------------------
net/sunrpc/auth_null.c | 23 +++--
net/sunrpc/auth_unix.c | 61 ++++++++-----
net/sunrpc/clnt.c | 66 +++++++-------
8 files changed, 266 insertions(+), 181 deletions(-)
diff --git a/include/linux/sunrpc/auth.h b/include/linux/sunrpc/auth.h
index eed3cb1..96e237f 100644
--- a/include/linux/sunrpc/auth.h
+++ b/include/linux/sunrpc/auth.h
@@ -131,11 +131,12 @@ struct rpc_credops {
void (*crdestroy)(struct rpc_cred *);
int (*crmatch)(struct auth_cred *, struct rpc_cred *, int);
- __be32 * (*crmarshal)(struct rpc_task *, __be32 *);
+ int (*crmarshal)(struct rpc_task *task,
+ struct xdr_stream *xdr);
int (*crrefresh)(struct rpc_task *);
__be32 * (*crvalidate)(struct rpc_task *, __be32 *);
- int (*crwrap_req)(struct rpc_task *, kxdreproc_t,
- void *, __be32 *, void *);
+ int (*crwrap_req)(struct rpc_task *task,
+ struct xdr_stream *xdr);
int (*crunwrap_resp)(struct rpc_task *, kxdrdproc_t,
void *, __be32 *, void *);
int (*crkey_timeout)(struct rpc_cred *);
@@ -165,9 +166,13 @@ int rpcauth_get_gssinfo(rpc_authflavor_t,
void rpcauth_init_cred(struct rpc_cred *, const struct auth_cred *, struct rpc_auth *, const struct rpc_credops *);
struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
void put_rpccred(struct rpc_cred *);
-__be32 * rpcauth_marshcred(struct rpc_task *, __be32 *);
+int rpcauth_marshcred(struct rpc_task *task,
+ struct xdr_stream *xdr);
__be32 * rpcauth_checkverf(struct rpc_task *, __be32 *);
-int rpcauth_wrap_req(struct rpc_task *task, kxdreproc_t encode, void *rqstp, __be32 *data, void *obj);
+int rpcauth_wrap_req_encode(struct rpc_task *task,
+ struct xdr_stream *xdr);
+int rpcauth_wrap_req(struct rpc_task *task,
+ struct xdr_stream *xdr);
int rpcauth_unwrap_resp(struct rpc_task *task, kxdrdproc_t decode, void *rqstp, __be32 *data, void *obj);
bool rpcauth_xmit_need_reencode(struct rpc_task *task);
int rpcauth_refreshcred(struct rpc_task *);
diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h
index 787939d..6df9ac1 100644
--- a/include/linux/sunrpc/xdr.h
+++ b/include/linux/sunrpc/xdr.h
@@ -87,6 +87,12 @@ struct xdr_buf {
#define xdr_one cpu_to_be32(1)
#define xdr_two cpu_to_be32(2)
+#define rpc_auth_null cpu_to_be32(RPC_AUTH_NULL)
+#define rpc_auth_unix cpu_to_be32(RPC_AUTH_UNIX)
+#define rpc_auth_gss cpu_to_be32(RPC_AUTH_GSS)
+
+#define rpc_call cpu_to_be32(RPC_CALL)
+
#define rpc_success cpu_to_be32(RPC_SUCCESS)
#define rpc_prog_unavail cpu_to_be32(RPC_PROG_UNAVAIL)
#define rpc_prog_mismatch cpu_to_be32(RPC_PROG_MISMATCH)
diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h
index 6276508..2b3f9d1 100644
--- a/include/trace/events/sunrpc.h
+++ b/include/trace/events/sunrpc.h
@@ -213,6 +213,35 @@
DEFINE_RPC_QUEUED_EVENT(sleep);
DEFINE_RPC_QUEUED_EVENT(wakeup);
+DECLARE_EVENT_CLASS(rpc_failure,
+
+ TP_PROTO(const struct rpc_task *task),
+
+ TP_ARGS(task),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, task_id)
+ __field(unsigned int, client_id)
+ ),
+
+ TP_fast_assign(
+ __entry->task_id = task->tk_pid;
+ __entry->client_id = task->tk_client->cl_clid;
+ ),
+
+ TP_printk("task:%u@%u",
+ __entry->task_id, __entry->client_id)
+);
+
+#define DEFINE_RPC_FAILURE(name) \
+ DEFINE_EVENT(rpc_failure, rpc_bad_##name, \
+ TP_PROTO( \
+ const struct rpc_task *task \
+ ), \
+ TP_ARGS(task))
+
+DEFINE_RPC_FAILURE(callhdr);
+
TRACE_EVENT(rpc_stats_latency,
TP_PROTO(
diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 275e84e..add2135 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -756,12 +756,21 @@ struct rpc_cred *
}
EXPORT_SYMBOL_GPL(put_rpccred);
-__be32 *
-rpcauth_marshcred(struct rpc_task *task, __be32 *p)
+/**
+ * rpcauth_marshcred - Append RPC credential to end of @xdr
+ * @task: controlling RPC task
+ * @xdr: xdr_stream containing initial portion of RPC Call header
+ *
+ * On success, an appropriate verifier is added to @xdr, @xdr is
+ * updated to point past the verifier, and zero is returned.
+ * Otherwise, @xdr is in an undefined state and a negative errno
+ * is returned.
+ */
+int rpcauth_marshcred(struct rpc_task *task, struct xdr_stream *xdr)
{
- struct rpc_cred *cred = task->tk_rqstp->rq_cred;
+ const struct rpc_credops *ops = task->tk_rqstp->rq_cred->cr_ops;
- return cred->cr_ops->crmarshal(task, p);
+ return ops->crmarshal(task, xdr);
}
__be32 *
@@ -772,26 +781,37 @@ struct rpc_cred *
return cred->cr_ops->crvalidate(task, p);
}
-static void rpcauth_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp,
- __be32 *data, void *obj)
+/**
+ * rpcauth_wrap_req_encode - XDR encode the RPC procedure
+ * @task: controlling RPC task
+ * @xdr: stream where on-the-wire bytes are to be marshalled
+ *
+ * On success, @xdr contains the encoded and wrapped message.
+ * Otherwise, @xdr is in an undefined state.
+ */
+int rpcauth_wrap_req_encode(struct rpc_task *task, struct xdr_stream *xdr)
{
- struct xdr_stream xdr;
+ kxdreproc_t encode = task->tk_msg.rpc_proc->p_encode;
- xdr_init_encode(&xdr, &rqstp->rq_snd_buf, data, rqstp);
- encode(rqstp, &xdr, obj);
+ encode(task->tk_rqstp, xdr, task->tk_msg.rpc_argp);
+ return 0;
}
+EXPORT_SYMBOL_GPL(rpcauth_wrap_req_encode);
-int
-rpcauth_wrap_req(struct rpc_task *task, kxdreproc_t encode, void *rqstp,
- __be32 *data, void *obj)
+/**
+ * rpcauth_wrap_req - XDR encode and wrap the RPC procedure
+ * @task: controlling RPC task
+ * @xdr: stream where on-the-wire bytes are to be marshalled
+ *
+ * On success, @xdr contains the encoded and wrapped message,
+ * and zero is returned. Otherwise, @xdr is in an undefined
+ * state and a negative errno is returned.
+ */
+int rpcauth_wrap_req(struct rpc_task *task, struct xdr_stream *xdr)
{
- struct rpc_cred *cred = task->tk_rqstp->rq_cred;
+ const struct rpc_credops *ops = task->tk_rqstp->rq_cred->cr_ops;
- if (cred->cr_ops->crwrap_req)
- return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj);
- /* By default, we encode the arguments normally. */
- rpcauth_wrap_req_encode(encode, rqstp, data, obj);
- return 0;
+ return ops->crwrap_req(task, xdr);
}
static int
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 4b52e2b..b333b1b 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -1526,18 +1526,20 @@ static void gss_pipe_free(struct gss_pipe *p)
}
/*
-* Marshal credentials.
-* Maybe we should keep a cached credential for performance reasons.
-*/
-static __be32 *
-gss_marshal(struct rpc_task *task, __be32 *p)
+ * Marshal credentials.
+ *
+ * The expensive part is computing the verifier. We can't cache a
+ * pre-computed version of the verifier because the seqno, which
+ * is different every time, is included in the MIC.
+ */
+static int gss_marshal(struct rpc_task *task, struct xdr_stream *xdr)
{
struct rpc_rqst *req = task->tk_rqstp;
struct rpc_cred *cred = req->rq_cred;
struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
gc_base);
struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
- __be32 *cred_len;
+ __be32 *p, *cred_len;
u32 maj_stat = 0;
struct xdr_netobj mic;
struct kvec iov;
@@ -1545,7 +1547,13 @@ static void gss_pipe_free(struct gss_pipe *p)
dprintk("RPC: %5u %s\n", task->tk_pid, __func__);
- *p++ = htonl(RPC_AUTH_GSS);
+ /* Credential */
+
+ p = xdr_reserve_space(xdr, 7 * sizeof(*p) +
+ ctx->gc_wire_ctx.len);
+ if (!p)
+ goto out_put_ctx;
+ *p++ = rpc_auth_gss;
cred_len = p++;
spin_lock(&ctx->gc_seq_lock);
@@ -1554,12 +1562,14 @@ static void gss_pipe_free(struct gss_pipe *p)
if (req->rq_seqno == MAXSEQ)
goto out_expired;
- *p++ = htonl((u32) RPC_GSS_VERSION);
- *p++ = htonl((u32) ctx->gc_proc);
- *p++ = htonl((u32) req->rq_seqno);
- *p++ = htonl((u32) gss_cred->gc_service);
+ *p++ = cpu_to_be32(RPC_GSS_VERSION);
+ *p++ = cpu_to_be32(ctx->gc_proc);
+ *p++ = cpu_to_be32(req->rq_seqno);
+ *p++ = cpu_to_be32(gss_cred->gc_service);
p = xdr_encode_netobj(p, &ctx->gc_wire_ctx);
- *cred_len = htonl((p - (cred_len + 1)) << 2);
+ *cred_len = cpu_to_be32((p - (cred_len + 1)) << 2);
+
+ /* Verifier */
/* We compute the checksum for the verifier over the xdr-encoded bytes
* starting with the xid and ending at the end of the credential: */
@@ -1567,27 +1577,27 @@ static void gss_pipe_free(struct gss_pipe *p)
iov.iov_len = (u8 *)p - (u8 *)iov.iov_base;
xdr_buf_from_iov(&iov, &verf_buf);
- /* set verifier flavor*/
- *p++ = htonl(RPC_AUTH_GSS);
-
+ p = xdr_reserve_space(xdr, sizeof(*p));
+ if (!p)
+ goto out_put_ctx;
+ *p++ = rpc_auth_gss;
mic.data = (u8 *)(p + 1);
maj_stat = gss_get_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
- if (maj_stat == GSS_S_CONTEXT_EXPIRED) {
+ if (maj_stat == GSS_S_CONTEXT_EXPIRED)
goto out_expired;
- } else if (maj_stat != 0) {
- pr_warn("gss_marshal: gss_get_mic FAILED (%d)\n", maj_stat);
- task->tk_status = -EIO;
+ else if (maj_stat != 0)
+ goto out_put_ctx;
+ if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0)
goto out_put_ctx;
- }
- p = xdr_encode_opaque(p, NULL, mic.len);
gss_put_ctx(ctx);
- return p;
+ return 0;
out_expired:
+ gss_put_ctx(ctx);
clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
- task->tk_status = -EKEYEXPIRED;
+ return -EKEYEXPIRED;
out_put_ctx:
gss_put_ctx(ctx);
- return NULL;
+ return -EMSGSIZE;
}
static int gss_renew_cred(struct rpc_task *task)
@@ -1716,61 +1726,45 @@ static int gss_cred_is_negative_entry(struct rpc_cred *cred)
return ret;
}
-static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp,
- __be32 *p, void *obj)
-{
- struct xdr_stream xdr;
-
- xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p, rqstp);
- encode(rqstp, &xdr, obj);
-}
-
-static inline int
-gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
- kxdreproc_t encode, struct rpc_rqst *rqstp,
- __be32 *p, void *obj)
+static int gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
+ struct rpc_task *task, struct xdr_stream *xdr)
{
- struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
- struct xdr_buf integ_buf;
- __be32 *integ_len = NULL;
+ struct rpc_rqst *rqstp = task->tk_rqstp;
+ struct xdr_buf integ_buf, *snd_buf = &rqstp->rq_snd_buf;
struct xdr_netobj mic;
- u32 offset;
- __be32 *q;
- struct kvec *iov;
- u32 maj_stat = 0;
- int status = -EIO;
+ __be32 *p, *integ_len;
+ u32 offset, maj_stat;
+ p = xdr_reserve_space(xdr, 2 * sizeof(*p));
+ if (!p)
+ goto wrap_failed;
integ_len = p++;
- offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
- *p++ = htonl(rqstp->rq_seqno);
+ *p = cpu_to_be32(rqstp->rq_seqno);
- gss_wrap_req_encode(encode, rqstp, p, obj);
+ if (rpcauth_wrap_req_encode(task, xdr))
+ goto wrap_failed;
+ offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
if (xdr_buf_subsegment(snd_buf, &integ_buf,
offset, snd_buf->len - offset))
- return status;
- *integ_len = htonl(integ_buf.len);
+ goto wrap_failed;
+ *integ_len = cpu_to_be32(integ_buf.len);
- /* guess whether we're in the head or the tail: */
- if (snd_buf->page_len || snd_buf->tail[0].iov_len)
- iov = snd_buf->tail;
- else
- iov = snd_buf->head;
- p = iov->iov_base + iov->iov_len;
+ p = xdr_reserve_space(xdr, 0);
+ if (!p)
+ goto wrap_failed;
mic.data = (u8 *)(p + 1);
-
maj_stat = gss_get_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
- status = -EIO; /* XXX? */
if (maj_stat == GSS_S_CONTEXT_EXPIRED)
clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
else if (maj_stat)
- return status;
- q = xdr_encode_opaque(p, NULL, mic.len);
-
- offset = (u8 *)q - (u8 *)p;
- iov->iov_len += offset;
- snd_buf->len += offset;
+ goto wrap_failed;
+ /* Check that the trailing MIC fit in the buffer, after the fact */
+ if (xdr_stream_encode_opaque_inline(xdr, (void **)&p, mic.len) < 0)
+ goto wrap_failed;
return 0;
+wrap_failed:
+ return -EMSGSIZE;
}
static void
@@ -1821,61 +1815,63 @@ static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp,
return -EAGAIN;
}
-static inline int
-gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
- kxdreproc_t encode, struct rpc_rqst *rqstp,
- __be32 *p, void *obj)
+static int gss_wrap_req_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
+ struct rpc_task *task, struct xdr_stream *xdr)
{
+ struct rpc_rqst *rqstp = task->tk_rqstp;
struct xdr_buf *snd_buf = &rqstp->rq_snd_buf;
- u32 offset;
- u32 maj_stat;
+ u32 pad, offset, maj_stat;
int status;
- __be32 *opaque_len;
+ __be32 *p, *opaque_len;
struct page **inpages;
int first;
- int pad;
struct kvec *iov;
- char *tmp;
+ status = -EIO;
+ p = xdr_reserve_space(xdr, 2 * sizeof(*p));
+ if (!p)
+ goto wrap_failed;
opaque_len = p++;
- offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
- *p++ = htonl(rqstp->rq_seqno);
+ *p = cpu_to_be32(rqstp->rq_seqno);
- gss_wrap_req_encode(encode, rqstp, p, obj);
+ if (rpcauth_wrap_req_encode(task, xdr))
+ goto wrap_failed;
status = alloc_enc_pages(rqstp);
- if (status)
- return status;
+ if (unlikely(status))
+ goto wrap_failed;
first = snd_buf->page_base >> PAGE_SHIFT;
inpages = snd_buf->pages + first;
snd_buf->pages = rqstp->rq_enc_pages;
snd_buf->page_base -= first << PAGE_SHIFT;
/*
- * Give the tail its own page, in case we need extra space in the
- * head when wrapping:
+ * Move the tail into its own page, in case gss_wrap needs
+ * more space in the head when wrapping.
*
- * call_allocate() allocates twice the slack space required
- * by the authentication flavor to rq_callsize.
- * For GSS, slack is GSS_CRED_SLACK.
+ * Still... Why can't gss_wrap just slide the tail down?
*/
if (snd_buf->page_len || snd_buf->tail[0].iov_len) {
+ char *tmp;
+
tmp = page_address(rqstp->rq_enc_pages[rqstp->rq_enc_pages_num - 1]);
memcpy(tmp, snd_buf->tail[0].iov_base, snd_buf->tail[0].iov_len);
snd_buf->tail[0].iov_base = tmp;
}
+ status = -EIO;
+ offset = (u8 *)p - (u8 *)snd_buf->head[0].iov_base;
maj_stat = gss_wrap(ctx->gc_gss_ctx, offset, snd_buf, inpages);
/* slack space should prevent this ever happening: */
- BUG_ON(snd_buf->len > snd_buf->buflen);
- status = -EIO;
+ if (unlikely(snd_buf->len > snd_buf->buflen))
+ goto wrap_failed;
/* We're assuming that when GSS_S_CONTEXT_EXPIRED, the encryption was
* done anyway, so it's safe to put the request on the wire: */
if (maj_stat == GSS_S_CONTEXT_EXPIRED)
clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
else if (maj_stat)
- return status;
+ goto wrap_failed;
- *opaque_len = htonl(snd_buf->len - offset);
- /* guess whether we're in the head or the tail: */
+ *opaque_len = cpu_to_be32(snd_buf->len - offset);
+ /* guess whether the pad goes into the head or the tail: */
if (snd_buf->page_len || snd_buf->tail[0].iov_len)
iov = snd_buf->tail;
else
@@ -1887,37 +1883,36 @@ static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp,
snd_buf->len += pad;
return 0;
+wrap_failed:
+ return status;
}
-static int
-gss_wrap_req(struct rpc_task *task,
- kxdreproc_t encode, void *rqstp, __be32 *p, void *obj)
+static int gss_wrap_req(struct rpc_task *task, struct xdr_stream *xdr)
{
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
struct gss_cred *gss_cred = container_of(cred, struct gss_cred,
gc_base);
struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
- int status = -EIO;
+ int status;
dprintk("RPC: %5u %s\n", task->tk_pid, __func__);
+ status = -EIO;
if (ctx->gc_proc != RPC_GSS_PROC_DATA) {
/* The spec seems a little ambiguous here, but I think that not
* wrapping context destruction requests makes the most sense.
*/
- gss_wrap_req_encode(encode, rqstp, p, obj);
- status = 0;
+ status = rpcauth_wrap_req_encode(task, xdr);
goto out;
}
switch (gss_cred->gc_service) {
case RPC_GSS_SVC_NONE:
- gss_wrap_req_encode(encode, rqstp, p, obj);
- status = 0;
+ status = rpcauth_wrap_req_encode(task, xdr);
break;
case RPC_GSS_SVC_INTEGRITY:
- status = gss_wrap_req_integ(cred, ctx, encode, rqstp, p, obj);
+ status = gss_wrap_req_integ(cred, ctx, task, xdr);
break;
case RPC_GSS_SVC_PRIVACY:
- status = gss_wrap_req_priv(cred, ctx, encode, rqstp, p, obj);
+ status = gss_wrap_req_priv(cred, ctx, task, xdr);
break;
}
out:
diff --git a/net/sunrpc/auth_null.c b/net/sunrpc/auth_null.c
index d0ceac5..797f8472 100644
--- a/net/sunrpc/auth_null.c
+++ b/net/sunrpc/auth_null.c
@@ -59,15 +59,21 @@
/*
* Marshal credential.
*/
-static __be32 *
-nul_marshal(struct rpc_task *task, __be32 *p)
+static int
+nul_marshal(struct rpc_task *task, struct xdr_stream *xdr)
{
- *p++ = htonl(RPC_AUTH_NULL);
- *p++ = 0;
- *p++ = htonl(RPC_AUTH_NULL);
- *p++ = 0;
-
- return p;
+ __be32 *p;
+
+ p = xdr_reserve_space(xdr, 4 * sizeof(*p));
+ if (!p)
+ return -EMSGSIZE;
+ /* Credential */
+ *p++ = rpc_auth_null;
+ *p++ = xdr_zero;
+ /* Verifier */
+ *p++ = rpc_auth_null;
+ *p = xdr_zero;
+ return 0;
}
/*
@@ -125,6 +131,7 @@ struct rpc_auth null_auth = {
.crdestroy = nul_destroy_cred,
.crmatch = nul_match,
.crmarshal = nul_marshal,
+ .crwrap_req = rpcauth_wrap_req_encode,
.crrefresh = nul_refresh,
.crvalidate = nul_validate,
};
diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index fc8a591..1d5b7ed 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -99,37 +99,55 @@
* Marshal credentials.
* Maybe we should keep a cached credential for performance reasons.
*/
-static __be32 *
-unx_marshal(struct rpc_task *task, __be32 *p)
+static int
+unx_marshal(struct rpc_task *task, struct xdr_stream *xdr)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
- __be32 *base, *hold;
+ __be32 *p, *cred_len, *gidarr_len;
int i;
struct group_info *gi = cred->cr_cred->group_info;
- *p++ = htonl(RPC_AUTH_UNIX);
- base = p++;
- *p++ = htonl(jiffies/HZ);
-
- /*
- * Copy the UTS nodename captured when the client was created.
- */
- p = xdr_encode_array(p, clnt->cl_nodename, clnt->cl_nodelen);
-
- *p++ = htonl((u32) from_kuid(&init_user_ns, cred->cr_cred->fsuid));
- *p++ = htonl((u32) from_kgid(&init_user_ns, cred->cr_cred->fsgid));
- hold = p++;
+ /* Credential */
+
+ p = xdr_reserve_space(xdr, 3 * sizeof(*p));
+ if (!p)
+ goto marshal_failed;
+ *p++ = rpc_auth_unix;
+ cred_len = p++;
+ *p++ = xdr_zero; /* stamp */
+ if (xdr_stream_encode_opaque(xdr, clnt->cl_nodename,
+ clnt->cl_nodelen) < 0)
+ goto marshal_failed;
+ p = xdr_reserve_space(xdr, 3 * sizeof(*p));
+ if (!p)
+ goto marshal_failed;
+ *p++ = cpu_to_be32(from_kuid(&init_user_ns, cred->cr_cred->fsuid));
+ *p++ = cpu_to_be32(from_kgid(&init_user_ns, cred->cr_cred->fsgid));
+
+ gidarr_len = p++;
if (gi)
for (i = 0; i < UNX_NGROUPS && i < gi->ngroups; i++)
- *p++ = htonl((u32) from_kgid(&init_user_ns, gi->gid[i]));
- *hold = htonl(p - hold - 1); /* gid array length */
- *base = htonl((p - base - 1) << 2); /* cred length */
+ *p++ = cpu_to_be32(from_kgid(&init_user_ns,
+ gi->gid[i]));
+ *gidarr_len = cpu_to_be32(p - gidarr_len - 1);
+ *cred_len = cpu_to_be32((p - cred_len - 1) << 2);
+ p = xdr_reserve_space(xdr, (p - gidarr_len - 1) << 2);
+ if (!p)
+ goto marshal_failed;
+
+ /* Verifier */
+
+ p = xdr_reserve_space(xdr, 2 * sizeof(*p));
+ if (!p)
+ goto marshal_failed;
+ *p++ = rpc_auth_null;
+ *p = xdr_zero;
- *p++ = htonl(RPC_AUTH_NULL);
- *p++ = htonl(0);
+ return 0;
- return p;
+marshal_failed:
+ return -EMSGSIZE;
}
/*
@@ -202,6 +220,7 @@ struct rpc_auth unix_auth = {
.crdestroy = unx_destroy_cred,
.crmatch = unx_match,
.crmarshal = unx_marshal,
+ .crwrap_req = rpcauth_wrap_req_encode,
.crrefresh = unx_refresh,
.crvalidate = unx_validate,
};
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index c4203f6..d6750b7 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -77,7 +77,8 @@
static void call_connect(struct rpc_task *task);
static void call_connect_status(struct rpc_task *task);
-static __be32 *rpc_encode_header(struct rpc_task *task);
+static int rpc_encode_header(struct rpc_task *task,
+ struct xdr_stream *xdr);
static __be32 *rpc_verify_header(struct rpc_task *task);
static int rpc_ping(struct rpc_clnt *clnt);
@@ -1728,10 +1729,7 @@ void rpc_force_rebind(struct rpc_clnt *clnt)
rpc_xdr_encode(struct rpc_task *task)
{
struct rpc_rqst *req = task->tk_rqstp;
- kxdreproc_t encode;
- __be32 *p;
-
- dprint_status(task);
+ struct xdr_stream xdr;
xdr_buf_init(&req->rq_snd_buf,
req->rq_buffer,
@@ -1740,18 +1738,13 @@ void rpc_force_rebind(struct rpc_clnt *clnt)
req->rq_rbuffer,
req->rq_rcvsize);
- p = rpc_encode_header(task);
- if (p == NULL)
+ req->rq_snd_buf.head[0].iov_len = 0;
+ xdr_init_encode(&xdr, &req->rq_snd_buf,
+ req->rq_snd_buf.head[0].iov_base, req);
+ if (rpc_encode_header(task, &xdr))
return;
- encode = task->tk_msg.rpc_proc->p_encode;
- if (encode == NULL)
- return;
-
- task->tk_status = rpcauth_wrap_req(task, encode, req, p,
- task->tk_msg.rpc_argp);
- if (task->tk_status == 0)
- xprt_request_prepare(req);
+ task->tk_status = rpcauth_wrap_req(task, &xdr);
}
/*
@@ -1762,6 +1755,7 @@ void rpc_force_rebind(struct rpc_clnt *clnt)
{
if (!rpc_task_need_encode(task))
goto out;
+ dprint_status(task);
/* Encode here so that rpcsec_gss can use correct sequence number. */
rpc_xdr_encode(task);
/* Did the encode result in an error condition? */
@@ -1779,6 +1773,8 @@ void rpc_force_rebind(struct rpc_clnt *clnt)
rpc_exit(task, task->tk_status);
}
return;
+ } else {
+ xprt_request_prepare(task->tk_rqstp);
}
/* Add task to reply queue before transmission to avoid races */
@@ -2322,25 +2318,33 @@ void rpc_force_rebind(struct rpc_clnt *clnt)
}
}
-static __be32 *
-rpc_encode_header(struct rpc_task *task)
+static int
+rpc_encode_header(struct rpc_task *task, struct xdr_stream *xdr)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_rqst *req = task->tk_rqstp;
- __be32 *p = req->rq_svec[0].iov_base;
-
- /* FIXME: check buffer size? */
-
- *p++ = req->rq_xid; /* XID */
- *p++ = htonl(RPC_CALL); /* CALL */
- *p++ = htonl(RPC_VERSION); /* RPC version */
- *p++ = htonl(clnt->cl_prog); /* program number */
- *p++ = htonl(clnt->cl_vers); /* program version */
- *p++ = htonl(task->tk_msg.rpc_proc->p_proc); /* procedure */
- p = rpcauth_marshcred(task, p);
- if (p)
- req->rq_slen = xdr_adjust_iovec(&req->rq_svec[0], p);
- return p;
+ __be32 *p;
+ int error;
+
+ error = -EMSGSIZE;
+ p = xdr_reserve_space(xdr, RPC_CALLHDRSIZE << 2);
+ if (!p)
+ goto out_fail;
+ *p++ = req->rq_xid;
+ *p++ = rpc_call;
+ *p++ = cpu_to_be32(RPC_VERSION);
+ *p++ = cpu_to_be32(clnt->cl_prog);
+ *p++ = cpu_to_be32(clnt->cl_vers);
+ *p = cpu_to_be32(task->tk_msg.rpc_proc->p_proc);
+
+ error = rpcauth_marshcred(task, xdr);
+ if (error < 0)
+ goto out_fail;
+ return 0;
+out_fail:
+ trace_rpc_bad_callhdr(task);
+ rpc_exit(task, error);
+ return error;
}
static __be32 *
