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From: Chuck Lever <chuck.lever@oracle.com>
To: linux-nfs@vger.kernel.org
Subject: [PATCH v1 60/61] NFSD: Replace READ* macros in nfsd4_decode_compound()
Date: Fri, 13 Nov 2020 10:07:39 -0500
Message-ID: <160528005934.6186.2184546567789022367.stgit@klimt.1015granger.net> (raw)
In-Reply-To: <160527962905.6186.17550620763636619885.stgit@klimt.1015granger.net>

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfs4proc.c |    2 +-
 fs/nfsd/nfs4xdr.c  |   67 +++++++++++++++++++++++-----------------------------
 fs/nfsd/xdr4.h     |    2 +-
 3 files changed, 32 insertions(+), 39 deletions(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index b810d048c5f8..205e1b3ce629 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -3281,7 +3281,7 @@ int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
 void warn_on_nonidempotent_op(struct nfsd4_op *op)
 {
 	if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
-		pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
+		pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
 			op->opnum, nfsd4_op_name(op->opnum));
 		WARN_ON_ONCE(1);
 	}
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 4332b16cfdc8..3ab248433f44 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -184,28 +184,6 @@ svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
 	return p;
 }
 
-/**
- * savemem - duplicate a chunk of memory for later processing
- * @argp: NFSv4 compound argument structure to be freed with
- * @p: pointer to be duplicated
- * @nbytes: length to be duplicated
- *
- * Returns a pointer to a copy of @nbytes bytes of memory at @p
- * that are preserved until processing of the NFSv4 compound
- * operation described by @argp finishes.
- */
-static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
-{
-	void *ret;
-
-	ret = svcxdr_tmpalloc(argp, nbytes);
-	if (!ret)
-		return NULL;
-	memcpy(ret, p, nbytes);
-	return ret;
-}
-
-
 /*
  * NFSv4 basic data type decoders
  */
@@ -2462,33 +2440,43 @@ nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
 static __be32
 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
 {
-	DECODE_HEAD;
 	struct nfsd4_op *op;
 	bool cachethis = false;
 	int auth_slack= argp->rqstp->rq_auth_slack;
 	int max_reply = auth_slack + 8; /* opcnt, status */
 	int readcount = 0;
 	int readbytes = 0;
+	__be32 *p;
 	int i;
 
-	READ_BUF(4);
-	argp->taglen = be32_to_cpup(p++);
-	READ_BUF(argp->taglen);
-	SAVEMEM(argp->tag, argp->taglen);
-	READ_BUF(8);
-	argp->minorversion = be32_to_cpup(p++);
-	argp->opcnt = be32_to_cpup(p++);
-	max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
+	if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
+		goto xdr_error;
+	argp->tag = NULL;
+	if (unlikely(argp->taglen)) {
+		if (argp->taglen > NFSD4_MAX_TAGLEN)
+			goto xdr_error;
+		p = xdr_inline_decode(argp->xdr, argp->taglen);
+		if (!p)
+			goto xdr_error;
+		argp->tag = svcxdr_tmpalloc(argp, argp->taglen);
+		if (!argp->tag)
+			goto nomem;
+		memcpy(argp->tag, p, argp->taglen);
+	}
 
-	if (argp->taglen > NFSD4_MAX_TAGLEN)
+	if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
+		goto xdr_error;
+	if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
 		goto xdr_error;
+	max_reply += 4 + xdr_align_size(argp->taglen);
+
 	/*
 	 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
 	 * here, so we return success at the xdr level so that
 	 * nfsd4_proc can handle this is an NFS-level error.
 	 */
 	if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
-		return 0;
+		goto out;
 
 	if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
 		argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
@@ -2506,8 +2494,8 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
 		op = &argp->ops[i];
 		op->replay = NULL;
 
-		READ_BUF(4);
-		op->opnum = be32_to_cpup(p++);
+		if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
+			goto xdr_error;
 
 		if (nfsd4_opnum_in_range(argp, op))
 			op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
@@ -2550,7 +2538,12 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
 	if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
 		clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
 
-	DECODE_TAIL;
+out:
+	return nfs_ok;
+xdr_error:
+	return nfserr_bad_xdr;
+nomem:
+	return nfserr_jukebox;
 }
 
 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
@@ -5460,7 +5453,7 @@ nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
 	if (op->status && opdesc &&
 			!(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
 		goto status;
-	BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
+	BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
 	       !nfsd4_enc_ops[op->opnum]);
 	encoder = nfsd4_enc_ops[op->opnum];
 	op->status = encoder(resp, op->status, &op->u);
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index 232529bc1b79..749c2d711d21 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -615,7 +615,7 @@ struct nfsd4_copy_notify {
 };
 
 struct nfsd4_op {
-	int					opnum;
+	u32					opnum;
 	const struct nfsd4_operation *		opdesc;
 	__be32					status;
 	union nfsd4_op_u {



  parent reply index

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-13 15:02 [PATCH v1 00/61] Update NFSD XDR functions Chuck Lever
2020-11-13 15:02 ` [PATCH v1 01/61] NFSD: Fix returned READDIR offset cookie Chuck Lever
2020-11-13 15:02 ` [PATCH v1 02/61] SUNRPC: Add xdr_set_scratch_page() and xdr_reset_scratch_buffer() Chuck Lever
2020-11-13 15:02 ` [PATCH v1 03/61] SUNRPC: Prepare for xdr_stream-style decoding on the server-side Chuck Lever
2020-11-13 15:02 ` [PATCH v1 04/61] NFSD: Add common helpers to decode void args and encode void results Chuck Lever
2020-11-13 15:02 ` [PATCH v1 05/61] NFSD: Replace the internals of the READ_BUF() macro Chuck Lever
2020-11-13 15:02 ` [PATCH v1 06/61] NFSD: Replace READ* macros in nfsd4_decode_access() Chuck Lever
2020-11-14  9:28   ` Christoph Hellwig
2020-11-14 18:26     ` Chuck Lever
2020-11-14 18:45       ` Christoph Hellwig
2020-11-14 18:48         ` Chuck Lever
2020-11-14 18:49           ` Christoph Hellwig
2020-11-13 15:03 ` [PATCH v1 07/61] NFSD: Replace READ* macros in nfsd4_decode_close() Chuck Lever
2020-11-14  9:29   ` Christoph Hellwig
2020-11-14 18:30     ` Chuck Lever
2020-11-14 18:47       ` Christoph Hellwig
2020-11-13 15:03 ` [PATCH v1 08/61] NFSD: Replace READ* macros in nfsd4_decode_commit() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 09/61] NFSD: Replace READ* macros in nfsd4_decode_create() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 10/61] NFSD: Replace READ* macros in nfsd4_decode_bitmap() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 11/61] NFSD: Replace READ* macros in nfsd4_decode_link() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 12/61] NFSD: Relocate nfsd4_decode_opaque() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 13/61] NFSD: Replace READ* macros in nfsd4_decode_lock() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 14/61] NFSD: Replace READ* macros in nfsd4_decode_lockt() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 15/61] NFSD: Replace READ* macros in nfsd4_decode_locku() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 16/61] NFSD: Replace READ* macros in nfsd4_decode_lookup() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 17/61] NFSD: Replace READ* macros in nfsd4_decode_time() Chuck Lever
2020-11-13 15:03 ` [PATCH v1 18/61] NFSD: Replace READ* macros in nfsd4_decode_fattr() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 19/61] NFSD: Replace READ* macros in nfsd4_decode_open() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 20/61] NFSD: Replace READ* macros in nfsd4_decode_open_confirm() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 21/61] NFSD: Replace READ* macros in nfsd4_decode_open_downgrade() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 22/61] NFSD: Replace READ* macros in nfsd4_decode_putfh() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 23/61] NFSD: Replace READ* macros in nfsd4_decode_read() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 24/61] NFSD: Replace READ* macros in nfsd4_decode_readdir() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 25/61] NFSD: Replace READ* macros in nfsd4_decode_remove() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 26/61] NFSD: Replace READ* macros in nfsd4_decode_rename() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 27/61] NFSD: Replace READ* macros in nfsd4_decode_renew() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 28/61] NFSD: Replace READ* macros in nfsd4_decode_secinfo() Chuck Lever
2020-11-13 15:04 ` [PATCH v1 29/61] NFSD: Replace READ* macros in nfsd4_decode_setclientid() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 30/61] NFSD: Replace READ* macros in nfsd4_decode_setclientid_confirm() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 31/61] NFSD: Replace READ* macros in nfsd4_decode_verify() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 32/61] NFSD: Replace READ* macros in nfsd4_decode_write() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 33/61] NFSD: Replace READ* macros in nfsd4_decode_release_lockowner() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 34/61] NFSD: Replace READ* macros in nfsd4_decode_cb_sec() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 35/61] NFSD: Replace READ* macros in nfsd4_decode_backchannel_ctl() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 36/61] NFSD: Replace READ* macros in nfsd4_decode_bind_conn_to_session() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 37/61] NFSD: Add a separate decoder to handle state_protect_ops Chuck Lever
2020-11-13 15:05 ` [PATCH v1 38/61] NFSD: Add a separate decoder for ssv_sp_parms Chuck Lever
2020-11-13 15:05 ` [PATCH v1 39/61] NFSD: Add a helper to decode state_protect4_a Chuck Lever
2020-11-13 15:05 ` [PATCH v1 40/61] NFSD: Replace READ* macros in nfsd4_decode_exchange_id() Chuck Lever
2020-11-13 15:05 ` [PATCH v1 41/61] NFSD: Replace READ* macros in nfsd4_decode_create_session() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 42/61] NFSD: Replace READ* macros in nfsd4_decode_destroy_session() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 43/61] NFSD: Replace READ* macros in nfsd4_decode_free_stateid() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 44/61] NFSD: Replace READ* macros in nfsd4_decode_getdeviceinfo() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 45/61] NFSD: Replace READ* macros in nfsd4_decode_layoutcommit() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 46/61] NFSD: Replace READ* macros in nfsd4_decode_layoutget() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 47/61] NFSD: Replace READ* macros in nfsd4_decode_layoutreturn() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 48/61] NFSD: Replace READ* macros in nfsd4_decode_secinfo_no_name() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 49/61] NFSD: Replace READ* macros in nfsd4_decode_sequence() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 50/61] NFSD: Replace READ* macros in nfsd4_decode_test_stateid() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 51/61] NFSD: Replace READ* macros in nfsd4_decode_destroy_clientid() Chuck Lever
2020-11-13 15:06 ` [PATCH v1 52/61] NFSD: Replace READ* macros in nfsd4_decode_reclaim_complete() Chuck Lever
2020-11-13 15:07 ` [PATCH v1 53/61] NFSD: Replace READ* macros in nfsd4_decode_fallocate() Chuck Lever
2020-11-13 15:07 ` [PATCH v1 54/61] NFSD: Replace READ* macros in nfsd4_decode_clone() Chuck Lever
2020-11-13 15:07 ` [PATCH v1 55/61] NFSD: Replace READ* macros in nfsd4_decode_copy() Chuck Lever
2020-11-13 15:07 ` [PATCH v1 56/61] NFSD: Replace READ* macros in nfsd4_decode_seek() Chuck Lever
2020-11-13 15:07 ` [PATCH v1 57/61] NFSD: Replace READ* macros in nfsd4_decode_xattr_name() Chuck Lever
2020-11-13 15:07 ` [PATCH v1 58/61] NFSD: Replace READ* macros in nfsd4_decode_setxattr() Chuck Lever
2020-11-13 15:07 ` [PATCH v1 59/61] NFSD: Replace READ* macros in nfsd4_decode_listxattrs() Chuck Lever
2020-11-13 15:07 ` Chuck Lever [this message]
2020-11-13 15:07 ` [PATCH v1 61/61] NFSD: Remove macros that are no longer used Chuck Lever

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