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authorChuck Lever <chuck.lever@oracle.com>2020-11-11 15:52:47 -0500
committerChuck Lever <chuck.lever@oracle.com>2020-11-30 14:46:35 -0500
commit0ae4c3e8a64ace1b8d7de033b0751afe43024416 (patch)
tree605b7f98f2df64da9a17d3176a8fee8d5a06a0a0 /net/sunrpc
parent231307df246eb29f30092836524ebb1fcb8f5b25 (diff)
SUNRPC: Add xdr_set_scratch_page() and xdr_reset_scratch_buffer()
Clean up: De-duplicate some frequently-used code. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r--net/sunrpc/auth_gss/gss_rpc_xdr.c2
-rw-r--r--net/sunrpc/xdr.c28
2 files changed, 5 insertions, 25 deletions
diff --git a/net/sunrpc/auth_gss/gss_rpc_xdr.c b/net/sunrpc/auth_gss/gss_rpc_xdr.c
index 2ff7b7083eba..c636c648849b 100644
--- a/net/sunrpc/auth_gss/gss_rpc_xdr.c
+++ b/net/sunrpc/auth_gss/gss_rpc_xdr.c
@@ -789,7 +789,7 @@ int gssx_dec_accept_sec_context(struct rpc_rqst *rqstp,
scratch = alloc_page(GFP_KERNEL);
if (!scratch)
return -ENOMEM;
- xdr_set_scratch_buffer(xdr, page_address(scratch), PAGE_SIZE);
+ xdr_set_scratch_page(xdr, scratch);
/* res->status */
err = gssx_dec_status(xdr, &res->status);
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c
index 28f81769a27c..c607744b3ea8 100644
--- a/net/sunrpc/xdr.c
+++ b/net/sunrpc/xdr.c
@@ -669,7 +669,7 @@ void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p,
struct kvec *iov = buf->head;
int scratch_len = buf->buflen - buf->page_len - buf->tail[0].iov_len;
- xdr_set_scratch_buffer(xdr, NULL, 0);
+ xdr_reset_scratch_buffer(xdr);
BUG_ON(scratch_len < 0);
xdr->buf = buf;
xdr->iov = iov;
@@ -713,7 +713,7 @@ inline void xdr_commit_encode(struct xdr_stream *xdr)
page = page_address(*xdr->page_ptr);
memcpy(xdr->scratch.iov_base, page, shift);
memmove(page, page + shift, (void *)xdr->p - page);
- xdr->scratch.iov_len = 0;
+ xdr_reset_scratch_buffer(xdr);
}
EXPORT_SYMBOL_GPL(xdr_commit_encode);
@@ -743,8 +743,7 @@ static __be32 *xdr_get_next_encode_buffer(struct xdr_stream *xdr,
* the "scratch" iov to track any temporarily unused fragment of
* space at the end of the previous buffer:
*/
- xdr->scratch.iov_base = xdr->p;
- xdr->scratch.iov_len = frag1bytes;
+ xdr_set_scratch_buffer(xdr, xdr->p, frag1bytes);
p = page_address(*xdr->page_ptr);
/*
* Note this is where the next encode will start after we've
@@ -1052,8 +1051,7 @@ 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;
- xdr->scratch.iov_len = 0;
+ xdr_reset_scratch_buffer(xdr);
xdr->nwords = XDR_QUADLEN(buf->len);
if (buf->head[0].iov_len != 0)
xdr_set_iov(xdr, buf->head, buf->len);
@@ -1101,24 +1099,6 @@ static __be32 * __xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes)
return p;
}
-/**
- * xdr_set_scratch_buffer - Attach a scratch buffer for decoding data.
- * @xdr: pointer to xdr_stream struct
- * @buf: pointer to an empty buffer
- * @buflen: size of 'buf'
- *
- * The scratch buffer is used when decoding from an array of pages.
- * If an xdr_inline_decode() call spans across page boundaries, then
- * we copy the data into the scratch buffer in order to allow linear
- * access.
- */
-void xdr_set_scratch_buffer(struct xdr_stream *xdr, void *buf, size_t buflen)
-{
- xdr->scratch.iov_base = buf;
- xdr->scratch.iov_len = buflen;
-}
-EXPORT_SYMBOL_GPL(xdr_set_scratch_buffer);
-
static __be32 *xdr_copy_to_scratch(struct xdr_stream *xdr, size_t nbytes)
{
__be32 *p;