SUNRPC: Use struct xdr_stream when decoding RPC Reply header
Modernize and harden the code path that parses an RPC Reply message. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever
Anna Schumaker
Родитель
7f5667a5f8
Коммит
a0584ee9ae
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@ -134,11 +134,12 @@ struct rpc_credops {
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int (*crmarshal)(struct rpc_task *task,
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struct xdr_stream *xdr);
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int (*crrefresh)(struct rpc_task *);
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__be32 * (*crvalidate)(struct rpc_task *, __be32 *);
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int (*crvalidate)(struct rpc_task *task,
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struct xdr_stream *xdr);
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int (*crwrap_req)(struct rpc_task *task,
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struct xdr_stream *xdr);
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int (*crunwrap_resp)(struct rpc_task *, kxdrdproc_t,
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void *, __be32 *, void *);
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int (*crunwrap_resp)(struct rpc_task *task,
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struct xdr_stream *xdr);
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int (*crkey_timeout)(struct rpc_cred *);
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char * (*crstringify_acceptor)(struct rpc_cred *);
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bool (*crneed_reencode)(struct rpc_task *);
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@ -168,12 +169,16 @@ struct rpc_cred * rpcauth_lookupcred(struct rpc_auth *, int);
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void put_rpccred(struct rpc_cred *);
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int rpcauth_marshcred(struct rpc_task *task,
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struct xdr_stream *xdr);
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__be32 * rpcauth_checkverf(struct rpc_task *, __be32 *);
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int rpcauth_checkverf(struct rpc_task *task,
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struct xdr_stream *xdr);
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int rpcauth_wrap_req_encode(struct rpc_task *task,
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struct xdr_stream *xdr);
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int rpcauth_wrap_req(struct rpc_task *task,
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struct xdr_stream *xdr);
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int rpcauth_unwrap_resp(struct rpc_task *task, kxdrdproc_t decode, void *rqstp, __be32 *data, void *obj);
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int rpcauth_unwrap_resp_decode(struct rpc_task *task,
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struct xdr_stream *xdr);
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int rpcauth_unwrap_resp(struct rpc_task *task,
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struct xdr_stream *xdr);
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bool rpcauth_xmit_need_reencode(struct rpc_task *task);
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int rpcauth_refreshcred(struct rpc_task *);
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void rpcauth_invalcred(struct rpc_task *);
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@ -89,6 +89,7 @@ xdr_buf_init(struct xdr_buf *buf, void *start, size_t len)
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#define rpc_auth_null cpu_to_be32(RPC_AUTH_NULL)
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#define rpc_auth_unix cpu_to_be32(RPC_AUTH_UNIX)
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#define rpc_auth_short cpu_to_be32(RPC_AUTH_SHORT)
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#define rpc_auth_gss cpu_to_be32(RPC_AUTH_GSS)
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#define rpc_call cpu_to_be32(RPC_CALL)
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@ -17,6 +17,8 @@
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#include <linux/sunrpc/gss_api.h>
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#include <linux/spinlock.h>
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#include <trace/events/sunrpc.h>
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#define RPC_CREDCACHE_DEFAULT_HASHBITS (4)
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struct rpc_cred_cache {
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struct hlist_head *hashtable;
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@ -773,14 +775,6 @@ int rpcauth_marshcred(struct rpc_task *task, struct xdr_stream *xdr)
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return ops->crmarshal(task, xdr);
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}
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__be32 *
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rpcauth_checkverf(struct rpc_task *task, __be32 *p)
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{
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struct rpc_cred *cred = task->tk_rqstp->rq_cred;
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return cred->cr_ops->crvalidate(task, p);
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}
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/**
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* rpcauth_wrap_req_encode - XDR encode the RPC procedure
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* @task: controlling RPC task
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@ -814,27 +808,52 @@ int rpcauth_wrap_req(struct rpc_task *task, struct xdr_stream *xdr)
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return ops->crwrap_req(task, xdr);
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}
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static int
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rpcauth_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp,
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__be32 *data, void *obj)
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/**
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* rpcauth_checkverf - Validate verifier in RPC Reply header
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* @task: controlling RPC task
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* @xdr: xdr_stream containing RPC Reply header
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*
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* On success, @xdr is updated to point past the verifier and
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* zero is returned. Otherwise, @xdr is in an undefined state
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* and a negative errno is returned.
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*/
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int
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rpcauth_checkverf(struct rpc_task *task, struct xdr_stream *xdr)
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{
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struct xdr_stream xdr;
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const struct rpc_credops *ops = task->tk_rqstp->rq_cred->cr_ops;
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xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, data, rqstp);
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return decode(rqstp, &xdr, obj);
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return ops->crvalidate(task, xdr);
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}
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/**
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* rpcauth_unwrap_resp_decode - Invoke XDR decode function
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* @task: controlling RPC task
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* @xdr: stream where the Reply message resides
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*
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* Returns zero on success; otherwise a negative errno is returned.
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*/
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int
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rpcauth_unwrap_resp(struct rpc_task *task, kxdrdproc_t decode, void *rqstp,
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__be32 *data, void *obj)
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rpcauth_unwrap_resp_decode(struct rpc_task *task, struct xdr_stream *xdr)
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{
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struct rpc_cred *cred = task->tk_rqstp->rq_cred;
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kxdrdproc_t decode = task->tk_msg.rpc_proc->p_decode;
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if (cred->cr_ops->crunwrap_resp)
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return cred->cr_ops->crunwrap_resp(task, decode, rqstp,
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data, obj);
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/* By default, we decode the arguments normally. */
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return rpcauth_unwrap_req_decode(decode, rqstp, data, obj);
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return decode(task->tk_rqstp, xdr, task->tk_msg.rpc_resp);
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}
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EXPORT_SYMBOL_GPL(rpcauth_unwrap_resp_decode);
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/**
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* rpcauth_unwrap_resp - Invoke unwrap and decode function for the cred
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* @task: controlling RPC task
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* @xdr: stream where the Reply message resides
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*
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* Returns zero on success; otherwise a negative errno is returned.
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*/
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int
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rpcauth_unwrap_resp(struct rpc_task *task, struct xdr_stream *xdr)
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{
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const struct rpc_credops *ops = task->tk_rqstp->rq_cred->cr_ops;
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return ops->crunwrap_resp(task, xdr);
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}
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bool
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@ -1671,59 +1671,62 @@ gss_refresh_null(struct rpc_task *task)
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return 0;
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}
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static __be32 *
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gss_validate(struct rpc_task *task, __be32 *p)
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static int
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gss_validate(struct rpc_task *task, struct xdr_stream *xdr)
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{
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struct rpc_cred *cred = task->tk_rqstp->rq_cred;
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struct gss_cl_ctx *ctx = gss_cred_get_ctx(cred);
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__be32 *seq = NULL;
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__be32 *p, *seq = NULL;
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struct kvec iov;
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struct xdr_buf verf_buf;
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struct xdr_netobj mic;
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u32 flav,len;
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u32 maj_stat;
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__be32 *ret = ERR_PTR(-EIO);
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u32 len, maj_stat;
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int status;
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dprintk("RPC: %5u %s\n", task->tk_pid, __func__);
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p = xdr_inline_decode(xdr, 2 * sizeof(*p));
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if (!p)
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goto validate_failed;
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if (*p++ != rpc_auth_gss)
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goto validate_failed;
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len = be32_to_cpup(p);
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if (len > RPC_MAX_AUTH_SIZE)
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goto validate_failed;
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p = xdr_inline_decode(xdr, len);
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if (!p)
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goto validate_failed;
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flav = ntohl(*p++);
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if ((len = ntohl(*p++)) > RPC_MAX_AUTH_SIZE)
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goto out_bad;
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if (flav != RPC_AUTH_GSS)
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goto out_bad;
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seq = kmalloc(4, GFP_NOFS);
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if (!seq)
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goto out_bad;
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*seq = htonl(task->tk_rqstp->rq_seqno);
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goto validate_failed;
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*seq = cpu_to_be32(task->tk_rqstp->rq_seqno);
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iov.iov_base = seq;
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iov.iov_len = 4;
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xdr_buf_from_iov(&iov, &verf_buf);
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mic.data = (u8 *)p;
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mic.len = len;
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ret = ERR_PTR(-EACCES);
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maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &verf_buf, &mic);
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if (maj_stat == GSS_S_CONTEXT_EXPIRED)
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clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
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if (maj_stat) {
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dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n",
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task->tk_pid, __func__, maj_stat);
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goto out_bad;
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}
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if (maj_stat)
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goto bad_mic;
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/* We leave it to unwrap to calculate au_rslack. For now we just
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* calculate the length of the verifier: */
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cred->cr_auth->au_verfsize = XDR_QUADLEN(len) + 2;
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status = 0;
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out:
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gss_put_ctx(ctx);
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dprintk("RPC: %5u %s: gss_verify_mic succeeded.\n",
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task->tk_pid, __func__);
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kfree(seq);
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return p + XDR_QUADLEN(len);
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out_bad:
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gss_put_ctx(ctx);
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dprintk("RPC: %5u %s failed ret %ld.\n", task->tk_pid, __func__,
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PTR_ERR(ret));
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kfree(seq);
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return ret;
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return status;
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validate_failed:
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status = -EIO;
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goto out;
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bad_mic:
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dprintk("RPC: %5u %s: gss_verify_mic returned error 0x%08x\n",
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task->tk_pid, __func__, maj_stat);
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status = -EACCES;
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goto out;
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}
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static int gss_wrap_req_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
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@ -1921,79 +1924,98 @@ out:
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return status;
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}
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static inline int
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gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
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struct rpc_rqst *rqstp, __be32 **p)
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static int
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gss_unwrap_resp_auth(struct rpc_cred *cred)
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{
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struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
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struct xdr_buf integ_buf;
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struct xdr_netobj mic;
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u32 data_offset, mic_offset;
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u32 integ_len;
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u32 maj_stat;
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int status = -EIO;
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cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize;
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return 0;
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}
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integ_len = ntohl(*(*p)++);
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static int
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gss_unwrap_resp_integ(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
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struct rpc_rqst *rqstp, struct xdr_stream *xdr)
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{
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struct xdr_buf integ_buf, *rcv_buf = &rqstp->rq_rcv_buf;
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u32 data_offset, mic_offset, integ_len, maj_stat;
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struct xdr_netobj mic;
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__be32 *p;
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p = xdr_inline_decode(xdr, 2 * sizeof(*p));
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if (unlikely(!p))
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goto unwrap_failed;
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integ_len = be32_to_cpup(p++);
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if (integ_len & 3)
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return status;
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data_offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
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goto unwrap_failed;
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data_offset = (u8 *)(p) - (u8 *)rcv_buf->head[0].iov_base;
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mic_offset = integ_len + data_offset;
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if (mic_offset > rcv_buf->len)
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return status;
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if (ntohl(*(*p)++) != rqstp->rq_seqno)
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return status;
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if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset,
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mic_offset - data_offset))
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return status;
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goto unwrap_failed;
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if (be32_to_cpup(p) != rqstp->rq_seqno)
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goto unwrap_failed;
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if (xdr_buf_subsegment(rcv_buf, &integ_buf, data_offset, integ_len))
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goto unwrap_failed;
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if (xdr_buf_read_netobj(rcv_buf, &mic, mic_offset))
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return status;
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goto unwrap_failed;
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maj_stat = gss_verify_mic(ctx->gc_gss_ctx, &integ_buf, &mic);
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if (maj_stat == GSS_S_CONTEXT_EXPIRED)
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clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
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if (maj_stat != GSS_S_COMPLETE)
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return status;
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goto bad_mic;
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cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + 2 +
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1 + XDR_QUADLEN(mic.len);
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return 0;
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unwrap_failed:
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return -EIO;
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bad_mic:
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dprintk("RPC: %s: gss_verify_mic returned error 0x%08x\n",
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__func__, maj_stat);
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return -EIO;
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}
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static inline int
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static int
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gss_unwrap_resp_priv(struct rpc_cred *cred, struct gss_cl_ctx *ctx,
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struct rpc_rqst *rqstp, __be32 **p)
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struct rpc_rqst *rqstp, struct xdr_stream *xdr)
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{
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struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
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u32 offset;
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u32 opaque_len;
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u32 maj_stat;
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int status = -EIO;
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struct xdr_buf *rcv_buf = &rqstp->rq_rcv_buf;
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struct kvec *head = rqstp->rq_rcv_buf.head;
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unsigned int savedlen = rcv_buf->len;
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u32 offset, opaque_len, maj_stat;
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__be32 *p;
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opaque_len = ntohl(*(*p)++);
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offset = (u8 *)(*p) - (u8 *)rcv_buf->head[0].iov_base;
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p = xdr_inline_decode(xdr, 2 * sizeof(*p));
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if (unlikely(!p))
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goto unwrap_failed;
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opaque_len = be32_to_cpup(p++);
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offset = (u8 *)(p) - (u8 *)head->iov_base;
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if (offset + opaque_len > rcv_buf->len)
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return status;
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/* remove padding: */
|
||||
goto unwrap_failed;
|
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rcv_buf->len = offset + opaque_len;
|
||||
|
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maj_stat = gss_unwrap(ctx->gc_gss_ctx, offset, rcv_buf);
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if (maj_stat == GSS_S_CONTEXT_EXPIRED)
|
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clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
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if (maj_stat != GSS_S_COMPLETE)
|
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return status;
|
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if (ntohl(*(*p)++) != rqstp->rq_seqno)
|
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return status;
|
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goto bad_unwrap;
|
||||
/* gss_unwrap decrypted the sequence number */
|
||||
if (be32_to_cpup(p++) != rqstp->rq_seqno)
|
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goto unwrap_failed;
|
||||
|
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/* gss_unwrap redacts the opaque blob from the head iovec.
|
||||
* rcv_buf has changed, thus the stream needs to be reset.
|
||||
*/
|
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xdr_init_decode(xdr, rcv_buf, p, rqstp);
|
||||
|
||||
cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + 2 +
|
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XDR_QUADLEN(savedlen - rcv_buf->len);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp,
|
||||
__be32 *p, void *obj)
|
||||
{
|
||||
struct xdr_stream xdr;
|
||||
|
||||
xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p, rqstp);
|
||||
return decode(rqstp, &xdr, obj);
|
||||
unwrap_failed:
|
||||
return -EIO;
|
||||
bad_unwrap:
|
||||
dprintk("RPC: %s: gss_unwrap returned error 0x%08x\n",
|
||||
__func__, maj_stat);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
static bool
|
||||
|
|
@ -2037,39 +2059,33 @@ out:
|
|||
}
|
||||
|
||||
static int
|
||||
gss_unwrap_resp(struct rpc_task *task,
|
||||
kxdrdproc_t decode, void *rqstp, __be32 *p, void *obj)
|
||||
gss_unwrap_resp(struct rpc_task *task, struct xdr_stream *xdr)
|
||||
{
|
||||
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
|
||||
struct rpc_rqst *rqstp = task->tk_rqstp;
|
||||
struct rpc_cred *cred = 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);
|
||||
__be32 *savedp = p;
|
||||
struct kvec *head = ((struct rpc_rqst *)rqstp)->rq_rcv_buf.head;
|
||||
int savedlen = head->iov_len;
|
||||
int status = -EIO;
|
||||
int status = -EIO;
|
||||
|
||||
if (ctx->gc_proc != RPC_GSS_PROC_DATA)
|
||||
goto out_decode;
|
||||
switch (gss_cred->gc_service) {
|
||||
case RPC_GSS_SVC_NONE:
|
||||
status = gss_unwrap_resp_auth(cred);
|
||||
break;
|
||||
case RPC_GSS_SVC_INTEGRITY:
|
||||
status = gss_unwrap_resp_integ(cred, ctx, rqstp, &p);
|
||||
if (status)
|
||||
goto out;
|
||||
status = gss_unwrap_resp_integ(cred, ctx, rqstp, xdr);
|
||||
break;
|
||||
case RPC_GSS_SVC_PRIVACY:
|
||||
status = gss_unwrap_resp_priv(cred, ctx, rqstp, &p);
|
||||
if (status)
|
||||
goto out;
|
||||
status = gss_unwrap_resp_priv(cred, ctx, rqstp, xdr);
|
||||
break;
|
||||
}
|
||||
/* take into account extra slack for integrity and privacy cases: */
|
||||
cred->cr_auth->au_rslack = cred->cr_auth->au_verfsize + (p - savedp)
|
||||
+ (savedlen - head->iov_len);
|
||||
if (status)
|
||||
goto out;
|
||||
|
||||
out_decode:
|
||||
status = gss_unwrap_req_decode(decode, rqstp, p, obj);
|
||||
status = rpcauth_unwrap_resp_decode(task, xdr);
|
||||
out:
|
||||
gss_put_ctx(ctx);
|
||||
dprintk("RPC: %5u %s returning %d\n",
|
||||
|
|
|
|||
|
|
@ -86,25 +86,19 @@ nul_refresh(struct rpc_task *task)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static __be32 *
|
||||
nul_validate(struct rpc_task *task, __be32 *p)
|
||||
static int
|
||||
nul_validate(struct rpc_task *task, struct xdr_stream *xdr)
|
||||
{
|
||||
rpc_authflavor_t flavor;
|
||||
u32 size;
|
||||
__be32 *p;
|
||||
|
||||
flavor = ntohl(*p++);
|
||||
if (flavor != RPC_AUTH_NULL) {
|
||||
printk("RPC: bad verf flavor: %u\n", flavor);
|
||||
return ERR_PTR(-EIO);
|
||||
}
|
||||
|
||||
size = ntohl(*p++);
|
||||
if (size != 0) {
|
||||
printk("RPC: bad verf size: %u\n", size);
|
||||
return ERR_PTR(-EIO);
|
||||
}
|
||||
|
||||
return p;
|
||||
p = xdr_inline_decode(xdr, 2 * sizeof(*p));
|
||||
if (!p)
|
||||
return -EIO;
|
||||
if (*p++ != rpc_auth_null)
|
||||
return -EIO;
|
||||
if (*p != xdr_zero)
|
||||
return -EIO;
|
||||
return 0;
|
||||
}
|
||||
|
||||
const struct rpc_authops authnull_ops = {
|
||||
|
|
@ -134,6 +128,7 @@ const struct rpc_credops null_credops = {
|
|||
.crwrap_req = rpcauth_wrap_req_encode,
|
||||
.crrefresh = nul_refresh,
|
||||
.crvalidate = nul_validate,
|
||||
.crunwrap_resp = rpcauth_unwrap_resp_decode,
|
||||
};
|
||||
|
||||
static
|
||||
|
|
|
|||
|
|
@ -160,29 +160,32 @@ unx_refresh(struct rpc_task *task)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static __be32 *
|
||||
unx_validate(struct rpc_task *task, __be32 *p)
|
||||
static int
|
||||
unx_validate(struct rpc_task *task, struct xdr_stream *xdr)
|
||||
{
|
||||
rpc_authflavor_t flavor;
|
||||
u32 size;
|
||||
__be32 *p;
|
||||
u32 size;
|
||||
|
||||
flavor = ntohl(*p++);
|
||||
if (flavor != RPC_AUTH_NULL &&
|
||||
flavor != RPC_AUTH_UNIX &&
|
||||
flavor != RPC_AUTH_SHORT) {
|
||||
printk("RPC: bad verf flavor: %u\n", flavor);
|
||||
return ERR_PTR(-EIO);
|
||||
p = xdr_inline_decode(xdr, 2 * sizeof(*p));
|
||||
if (!p)
|
||||
return -EIO;
|
||||
switch (*p++) {
|
||||
case rpc_auth_null:
|
||||
case rpc_auth_unix:
|
||||
case rpc_auth_short:
|
||||
break;
|
||||
default:
|
||||
return -EIO;
|
||||
}
|
||||
size = be32_to_cpup(p);
|
||||
if (size > RPC_MAX_AUTH_SIZE)
|
||||
return -EIO;
|
||||
p = xdr_inline_decode(xdr, size);
|
||||
if (!p)
|
||||
return -EIO;
|
||||
|
||||
size = ntohl(*p++);
|
||||
if (size > RPC_MAX_AUTH_SIZE) {
|
||||
printk("RPC: giant verf size: %u\n", size);
|
||||
return ERR_PTR(-EIO);
|
||||
}
|
||||
task->tk_rqstp->rq_cred->cr_auth->au_rslack = (size >> 2) + 2;
|
||||
p += (size >> 2);
|
||||
|
||||
return p;
|
||||
return 0;
|
||||
}
|
||||
|
||||
int __init rpc_init_authunix(void)
|
||||
|
|
@ -223,4 +226,5 @@ const struct rpc_credops unix_credops = {
|
|||
.crwrap_req = rpcauth_wrap_req_encode,
|
||||
.crrefresh = unx_refresh,
|
||||
.crvalidate = unx_validate,
|
||||
.crunwrap_resp = rpcauth_unwrap_resp_decode,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -79,7 +79,8 @@ static void call_connect_status(struct rpc_task *task);
|
|||
|
||||
static int rpc_encode_header(struct rpc_task *task,
|
||||
struct xdr_stream *xdr);
|
||||
static __be32 *rpc_decode_header(struct rpc_task *task);
|
||||
static int rpc_decode_header(struct rpc_task *task,
|
||||
struct xdr_stream *xdr);
|
||||
static int rpc_ping(struct rpc_clnt *clnt);
|
||||
|
||||
static void rpc_register_client(struct rpc_clnt *clnt)
|
||||
|
|
@ -2251,12 +2252,11 @@ call_decode(struct rpc_task *task)
|
|||
{
|
||||
struct rpc_clnt *clnt = task->tk_client;
|
||||
struct rpc_rqst *req = task->tk_rqstp;
|
||||
kxdrdproc_t decode = task->tk_msg.rpc_proc->p_decode;
|
||||
__be32 *p;
|
||||
struct xdr_stream xdr;
|
||||
|
||||
dprint_status(task);
|
||||
|
||||
if (!decode) {
|
||||
if (!task->tk_msg.rpc_proc->p_decode) {
|
||||
task->tk_action = rpc_exit_task;
|
||||
return;
|
||||
}
|
||||
|
|
@ -2292,29 +2292,27 @@ call_decode(struct rpc_task *task)
|
|||
goto out_retry;
|
||||
}
|
||||
|
||||
p = rpc_decode_header(task);
|
||||
if (IS_ERR(p)) {
|
||||
if (p == ERR_PTR(-EAGAIN))
|
||||
goto out_retry;
|
||||
xdr_init_decode(&xdr, &req->rq_rcv_buf,
|
||||
req->rq_rcv_buf.head[0].iov_base, req);
|
||||
switch (rpc_decode_header(task, &xdr)) {
|
||||
case 0:
|
||||
task->tk_action = rpc_exit_task;
|
||||
task->tk_status = rpcauth_unwrap_resp(task, &xdr);
|
||||
dprintk("RPC: %5u %s result %d\n",
|
||||
task->tk_pid, __func__, task->tk_status);
|
||||
return;
|
||||
}
|
||||
task->tk_action = rpc_exit_task;
|
||||
|
||||
task->tk_status = rpcauth_unwrap_resp(task, decode, req, p,
|
||||
task->tk_msg.rpc_resp);
|
||||
|
||||
dprintk("RPC: %5u call_decode result %d\n", task->tk_pid,
|
||||
task->tk_status);
|
||||
return;
|
||||
case -EAGAIN:
|
||||
out_retry:
|
||||
task->tk_status = 0;
|
||||
/* Note: rpc_decode_header() may have freed the RPC slot */
|
||||
if (task->tk_rqstp == req) {
|
||||
xdr_free_bvec(&req->rq_rcv_buf);
|
||||
req->rq_reply_bytes_recvd = req->rq_rcv_buf.len = 0;
|
||||
if (task->tk_client->cl_discrtry)
|
||||
xprt_conditional_disconnect(req->rq_xprt,
|
||||
req->rq_connect_cookie);
|
||||
task->tk_status = 0;
|
||||
/* Note: rpc_decode_header() may have freed the RPC slot */
|
||||
if (task->tk_rqstp == req) {
|
||||
xdr_free_bvec(&req->rq_rcv_buf);
|
||||
req->rq_reply_bytes_recvd = 0;
|
||||
req->rq_rcv_buf.len = 0;
|
||||
if (task->tk_client->cl_discrtry)
|
||||
xprt_conditional_disconnect(req->rq_xprt,
|
||||
req->rq_connect_cookie);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -2347,14 +2345,12 @@ out_fail:
|
|||
return error;
|
||||
}
|
||||
|
||||
static noinline __be32 *
|
||||
rpc_decode_header(struct rpc_task *task)
|
||||
static noinline int
|
||||
rpc_decode_header(struct rpc_task *task, struct xdr_stream *xdr)
|
||||
{
|
||||
struct rpc_clnt *clnt = task->tk_client;
|
||||
struct kvec *iov = &task->tk_rqstp->rq_rcv_buf.head[0];
|
||||
int len = task->tk_rqstp->rq_rcv_buf.len >> 2;
|
||||
__be32 *p = iov->iov_base;
|
||||
int error = -EACCES;
|
||||
__be32 *p;
|
||||
|
||||
/* RFC-1014 says that the representation of XDR data must be a
|
||||
* multiple of four bytes
|
||||
|
|
@ -2363,25 +2359,26 @@ rpc_decode_header(struct rpc_task *task)
|
|||
*/
|
||||
if (task->tk_rqstp->rq_rcv_buf.len & 3)
|
||||
goto out_badlen;
|
||||
if ((len -= 3) < 0)
|
||||
goto out_unparsable;
|
||||
|
||||
p = xdr_inline_decode(xdr, 3 * sizeof(*p));
|
||||
if (!p)
|
||||
goto out_unparsable;
|
||||
p++; /* skip XID */
|
||||
if (*p++ != rpc_reply)
|
||||
goto out_unparsable;
|
||||
if (*p++ != rpc_msg_accepted)
|
||||
goto out_msg_denied;
|
||||
|
||||
p = rpcauth_checkverf(task, p);
|
||||
if (IS_ERR(p))
|
||||
error = rpcauth_checkverf(task, xdr);
|
||||
if (error)
|
||||
goto out_verifier;
|
||||
|
||||
len = p - (__be32 *)iov->iov_base - 1;
|
||||
if (len < 0)
|
||||
p = xdr_inline_decode(xdr, sizeof(*p));
|
||||
if (!p)
|
||||
goto out_unparsable;
|
||||
switch (*p++) {
|
||||
switch (*p) {
|
||||
case rpc_success:
|
||||
return p;
|
||||
return 0;
|
||||
case rpc_prog_unavail:
|
||||
trace_rpc__prog_unavail(task);
|
||||
error = -EPFNOSUPPORT;
|
||||
|
|
@ -2406,11 +2403,11 @@ out_garbage:
|
|||
if (task->tk_garb_retry) {
|
||||
task->tk_garb_retry--;
|
||||
task->tk_action = call_encode;
|
||||
return ERR_PTR(-EAGAIN);
|
||||
return -EAGAIN;
|
||||
}
|
||||
out_err:
|
||||
rpc_exit(task, error);
|
||||
return ERR_PTR(error);
|
||||
return error;
|
||||
|
||||
out_badlen:
|
||||
trace_rpc__unparsable(task);
|
||||
|
|
@ -2424,10 +2421,12 @@ out_unparsable:
|
|||
|
||||
out_verifier:
|
||||
trace_rpc_bad_verifier(task);
|
||||
error = PTR_ERR(p);
|
||||
goto out_garbage;
|
||||
|
||||
out_msg_denied:
|
||||
p = xdr_inline_decode(xdr, sizeof(*p));
|
||||
if (!p)
|
||||
goto out_unparsable;
|
||||
switch (*p++) {
|
||||
case rpc_auth_error:
|
||||
break;
|
||||
|
|
@ -2441,6 +2440,9 @@ out_msg_denied:
|
|||
goto out_err;
|
||||
}
|
||||
|
||||
p = xdr_inline_decode(xdr, sizeof(*p));
|
||||
if (!p)
|
||||
goto out_unparsable;
|
||||
switch (*p++) {
|
||||
case rpc_autherr_rejectedcred:
|
||||
case rpc_autherr_rejectedverf:
|
||||
|
|
@ -2454,7 +2456,7 @@ out_msg_denied:
|
|||
/* Ensure we obtain a new XID! */
|
||||
xprt_release(task);
|
||||
task->tk_action = call_reserve;
|
||||
return ERR_PTR(-EAGAIN);
|
||||
return -EAGAIN;
|
||||
case rpc_autherr_badcred:
|
||||
case rpc_autherr_badverf:
|
||||
/* possibly garbled cred/verf? */
|
||||
|
|
@ -2463,7 +2465,7 @@ out_msg_denied:
|
|||
task->tk_garb_retry--;
|
||||
trace_rpc__bad_creds(task);
|
||||
task->tk_action = call_encode;
|
||||
return ERR_PTR(-EAGAIN);
|
||||
return -EAGAIN;
|
||||
case rpc_autherr_tooweak:
|
||||
trace_rpc__auth_tooweak(task);
|
||||
pr_warn("RPC: server %s requires stronger authentication.\n",
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче