From 0ccc61b1c76e5163c6fea6cf83bd18e7ea244c5b Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Mon, 11 Feb 2019 11:24:05 -0500 Subject: [PATCH] SUNRPC: Add xdr_stream::rqst field Having access to the controlling rpc_rqst means a trace point in the XDR code can report: - the XID - the task ID and client ID - the p_name of RPC being processed Subsequent patches will introduce such trace points. Signed-off-by: Chuck Lever Signed-off-by: Anna Schumaker --- fs/nfs/callback_xdr.c | 5 +++-- fs/nfs/flexfilelayout/flexfilelayout.c | 2 +- include/linux/sunrpc/xdr.h | 8 ++++++-- net/sunrpc/auth.c | 4 ++-- net/sunrpc/auth_gss/auth_gss.c | 4 ++-- net/sunrpc/xdr.c | 12 +++++++++--- net/sunrpc/xprtrdma/backchannel.c | 2 +- net/sunrpc/xprtrdma/rpc_rdma.c | 4 ++-- 8 files changed, 26 insertions(+), 15 deletions(-) diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c index a87a56273407..bc7c1766a2be 100644 --- a/fs/nfs/callback_xdr.c +++ b/fs/nfs/callback_xdr.c @@ -943,10 +943,11 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp) }; unsigned int nops = 0; - xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); + xdr_init_decode(&xdr_in, &rqstp->rq_arg, + rqstp->rq_arg.head[0].iov_base, NULL); p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); - xdr_init_encode(&xdr_out, &rqstp->rq_res, p); + xdr_init_encode(&xdr_out, &rqstp->rq_res, p, NULL); status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); if (status == htonl(NFS4ERR_RESOURCE)) diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c index 63abe705f4ca..32701b6a9566 100644 --- a/fs/nfs/flexfilelayout/flexfilelayout.c +++ b/fs/nfs/flexfilelayout/flexfilelayout.c @@ -2036,7 +2036,7 @@ ff_layout_encode_layoutreturn(struct xdr_stream *xdr, dprintk("%s: Begin\n", __func__); - xdr_init_encode(&tmp_xdr, &tmp_buf, NULL); + xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL); ff_layout_encode_ioerr(&tmp_xdr, args, ff_args); ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args); diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index 2ec128060239..787939d13643 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -217,6 +217,8 @@ struct xdr_stream { struct kvec scratch; /* Scratch buffer */ struct page **page_ptr; /* pointer to the current page */ unsigned int nwords; /* Remaining decode buffer length */ + + struct rpc_rqst *rqst; /* For debugging */ }; /* @@ -227,7 +229,8 @@ typedef void (*kxdreproc_t)(struct rpc_rqst *rqstp, struct xdr_stream *xdr, typedef int (*kxdrdproc_t)(struct rpc_rqst *rqstp, struct xdr_stream *xdr, void *obj); -extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p); +extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, + __be32 *p, struct rpc_rqst *rqst); extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes); extern void xdr_commit_encode(struct xdr_stream *xdr); extern void xdr_truncate_encode(struct xdr_stream *xdr, size_t len); @@ -235,7 +238,8 @@ extern int xdr_restrict_buflen(struct xdr_stream *xdr, int newbuflen); extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages, unsigned int base, unsigned int len); extern unsigned int xdr_stream_pos(const struct xdr_stream *xdr); -extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p); +extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, + __be32 *p, struct rpc_rqst *rqst); extern void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf, struct page **pages, unsigned int len); extern void xdr_set_scratch_buffer(struct xdr_stream *xdr, void *buf, size_t buflen); diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c index f3023bbc0b7f..8dfab6119e6a 100644 --- a/net/sunrpc/auth.c +++ b/net/sunrpc/auth.c @@ -798,7 +798,7 @@ static void rpcauth_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, { struct xdr_stream xdr; - xdr_init_encode(&xdr, &rqstp->rq_snd_buf, data); + xdr_init_encode(&xdr, &rqstp->rq_snd_buf, data, rqstp); encode(rqstp, &xdr, obj); } @@ -823,7 +823,7 @@ rpcauth_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, { struct xdr_stream xdr; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, data); + xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, data, rqstp); return decode(rqstp, &xdr, obj); } diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index 1531b0219344..a42672e81792 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -1722,7 +1722,7 @@ static void gss_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp, { struct xdr_stream xdr; - xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p); + xdr_init_encode(&xdr, &rqstp->rq_snd_buf, p, rqstp); encode(rqstp, &xdr, obj); } @@ -1998,7 +1998,7 @@ gss_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp, { struct xdr_stream xdr; - xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p); + xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p, rqstp); return decode(rqstp, &xdr, obj); } diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index f302c6eb8779..345f08b634ee 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -483,6 +483,7 @@ EXPORT_SYMBOL_GPL(xdr_stream_pos); * @xdr: pointer to xdr_stream struct * @buf: pointer to XDR buffer in which to encode data * @p: current pointer inside XDR buffer + * @rqst: pointer to controlling rpc_rqst, for debugging * * Note: at the moment the RPC client only passes the length of our * scratch buffer in the xdr_buf's header kvec. Previously this @@ -491,7 +492,8 @@ EXPORT_SYMBOL_GPL(xdr_stream_pos); * of the buffer length, and takes care of adjusting the kvec * length for us. */ -void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p) +void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p, + struct rpc_rqst *rqst) { struct kvec *iov = buf->head; int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len; @@ -513,6 +515,7 @@ void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p) buf->len += len; iov->iov_len += len; } + xdr->rqst = rqst; } EXPORT_SYMBOL_GPL(xdr_init_encode); @@ -819,8 +822,10 @@ static bool xdr_set_next_buffer(struct xdr_stream *xdr) * @xdr: pointer to xdr_stream struct * @buf: pointer to XDR buffer from which to decode data * @p: current pointer inside XDR buffer + * @rqst: pointer to controlling rpc_rqst, for debugging */ -void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p) +void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p, + struct rpc_rqst *rqst) { xdr->buf = buf; xdr->scratch.iov_base = NULL; @@ -836,6 +841,7 @@ void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p) xdr->nwords -= p - xdr->p; xdr->p = p; } + xdr->rqst = rqst; } EXPORT_SYMBOL_GPL(xdr_init_decode); @@ -854,7 +860,7 @@ void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf, buf->page_len = len; buf->buflen = len; buf->len = len; - xdr_init_decode(xdr, buf, NULL); + xdr_init_decode(xdr, buf, NULL, NULL); } EXPORT_SYMBOL_GPL(xdr_init_decode_pages); diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c index 0de9b3e63770..98c1e43eb7b1 100644 --- a/net/sunrpc/xprtrdma/backchannel.c +++ b/net/sunrpc/xprtrdma/backchannel.c @@ -123,7 +123,7 @@ static int rpcrdma_bc_marshal_reply(struct rpc_rqst *rqst) rpcrdma_set_xdrlen(&req->rl_hdrbuf, 0); xdr_init_encode(&req->rl_stream, &req->rl_hdrbuf, - req->rl_rdmabuf->rg_base); + req->rl_rdmabuf->rg_base, rqst); p = xdr_reserve_space(&req->rl_stream, 28); if (unlikely(!p)) diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 7774aee7c013..6c1fb270f127 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -748,7 +748,7 @@ rpcrdma_marshal_req(struct rpcrdma_xprt *r_xprt, struct rpc_rqst *rqst) rpcrdma_set_xdrlen(&req->rl_hdrbuf, 0); xdr_init_encode(xdr, &req->rl_hdrbuf, - req->rl_rdmabuf->rg_base); + req->rl_rdmabuf->rg_base, rqst); /* Fixed header fields */ ret = -EMSGSIZE; @@ -1329,7 +1329,7 @@ void rpcrdma_reply_handler(struct rpcrdma_rep *rep) /* Fixed transport header fields */ xdr_init_decode(&rep->rr_stream, &rep->rr_hdrbuf, - rep->rr_hdrbuf.head[0].iov_base); + rep->rr_hdrbuf.head[0].iov_base, NULL); p = xdr_inline_decode(&rep->rr_stream, 4 * sizeof(*p)); if (unlikely(!p)) goto out_shortreply;