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| author |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-11-21 21:21:11 -0500 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2020-12-02 14:05:54 -0500 |
| commit | 0279024f22705128c7139bd55af6981afe90e876 (patch) | |
| tree | a5d6964627c097a6dee11d294ed77100278e9c8e /net/sunrpc/xdr.c | |
| parent | SUNRPC: Clean up the handling of page padding in rpc_prepare_reply_pages() (diff) | |
| download | linux-dev-0279024f22705128c7139bd55af6981afe90e876.tar.xz linux-dev-0279024f22705128c7139bd55af6981afe90e876.zip | |
SUNRPC: Fix up xdr_set_page()
While we always want to align to the next page and/or the beginning of
the tail buffer when we call xdr_set_next_page(), the functions
xdr_align_data() and xdr_expand_hole() really want to align to the next
object in that next page or tail.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'net/sunrpc/xdr.c')
| -rw-r--r-- | net/sunrpc/xdr.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 5a450055469f..ddd5cc2281ab 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -1019,8 +1019,10 @@ static unsigned int xdr_set_page_base(struct xdr_stream *xdr, static void xdr_set_page(struct xdr_stream *xdr, unsigned int base, unsigned int len) { - if (xdr_set_page_base(xdr, base, len) == 0) - xdr_set_iov(xdr, xdr->buf->tail, 0, xdr_stream_remaining(xdr)); + if (xdr_set_page_base(xdr, base, len) == 0) { + base -= xdr->buf->page_len; + xdr_set_iov(xdr, xdr->buf->tail, base, len); + } } static void xdr_set_next_page(struct xdr_stream *xdr) @@ -1029,17 +1031,18 @@ static void xdr_set_next_page(struct xdr_stream *xdr) newbase = (1 + xdr->page_ptr - xdr->buf->pages) << PAGE_SHIFT; newbase -= xdr->buf->page_base; - - xdr_set_page(xdr, newbase, PAGE_SIZE); + if (newbase < xdr->buf->page_len) + xdr_set_page_base(xdr, newbase, xdr_stream_remaining(xdr)); + else + xdr_set_iov(xdr, xdr->buf->tail, 0, xdr_stream_remaining(xdr)); } static bool xdr_set_next_buffer(struct xdr_stream *xdr) { if (xdr->page_ptr != NULL) xdr_set_next_page(xdr); - else if (xdr->iov == xdr->buf->head) { - xdr_set_page(xdr, 0, PAGE_SIZE); - } + else if (xdr->iov == xdr->buf->head) + xdr_set_page(xdr, 0, xdr_stream_remaining(xdr)); return xdr->p != xdr->end; } @@ -1277,7 +1280,7 @@ uint64_t xdr_align_data(struct xdr_stream *xdr, uint64_t offset, uint32_t length } xdr->nwords -= XDR_QUADLEN(length); - xdr_set_page(xdr, from + length, PAGE_SIZE); + xdr_set_page(xdr, from + length, xdr_stream_remaining(xdr)); return length; } EXPORT_SYMBOL_GPL(xdr_align_data); @@ -1314,7 +1317,7 @@ uint64_t xdr_expand_hole(struct xdr_stream *xdr, uint64_t offset, uint64_t lengt _zero_pages(buf->pages, buf->page_base + offset, length); buf->len += length - (from - offset) - truncated; - xdr_set_page(xdr, offset + length, PAGE_SIZE); + xdr_set_page(xdr, offset + length, xdr_stream_remaining(xdr)); return length; } EXPORT_SYMBOL_GPL(xdr_expand_hole); |