From patchwork Sun May 22 23:50:18 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benny Halevy X-Patchwork-Id: 807242 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.3) with ESMTP id p4MNlC5e023347 for ; Sun, 22 May 2011 23:50:55 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755171Ab1EVXuz (ORCPT ); Sun, 22 May 2011 19:50:55 -0400 Received: from daytona.panasas.com ([67.152.220.89]:43396 "EHLO daytona.panasas.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754626Ab1EVXuy (ORCPT ); Sun, 22 May 2011 19:50:54 -0400 Received: from lt.bhalevy.com.com ([172.17.33.45]) by daytona.panasas.com with Microsoft SMTPSVC(6.0.3790.4675); Sun, 22 May 2011 19:50:40 -0400 From: Benny Halevy To: Trond Myklebust Cc: Boaz Harrosh , linux-nfs@vger.kernel.org Subject: [PATCH v5 11/38] SUNRPC: introduce xdr_init_decode_pages Date: Mon, 23 May 2011 02:50:18 +0300 Message-Id: <1306108218-28222-1-git-send-email-bhalevy@panasas.com> X-Mailer: git-send-email 1.7.3.4 In-Reply-To: <4DD99F9B.2040406@panasas.com> References: <4DD99F9B.2040406@panasas.com> X-OriginalArrivalTime: 22 May 2011 23:50:40.0368 (UTC) FILETIME=[0E4C2F00:01CC18DB] Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Sun, 22 May 2011 23:50:55 +0000 (UTC) Initialize xdr_stream and xdr_buf using an array of page pointers and length of buffer. Signed-off-by: Benny Halevy --- fs/nfs/dir.c | 9 ++------- fs/nfs/nfs4filelayout.c | 9 ++------- fs/nfs/nfs4filelayoutdev.c | 9 ++------- include/linux/sunrpc/xdr.h | 2 ++ net/sunrpc/xdr.c | 19 +++++++++++++++++++ 5 files changed, 27 insertions(+), 21 deletions(-) diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 7237672..f673a9e 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -512,12 +512,7 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en struct page **xdr_pages, struct page *page, unsigned int buflen) { struct xdr_stream stream; - struct xdr_buf buf = { - .pages = xdr_pages, - .page_len = buflen, - .buflen = buflen, - .len = buflen, - }; + struct xdr_buf buf; struct page *scratch; struct nfs_cache_array *array; unsigned int count = 0; @@ -527,7 +522,7 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en if (scratch == NULL) return -ENOMEM; - xdr_init_decode(&stream, &buf, NULL); + xdr_init_decode_pages(&stream, &buf, xdr_pages, buflen); xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); do { diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c index c181a8b..5b3080d 100644 --- a/fs/nfs/nfs4filelayout.c +++ b/fs/nfs/nfs4filelayout.c @@ -509,12 +509,7 @@ filelayout_decode_layout(struct pnfs_layout_hdr *flo, gfp_t gfp_flags) { struct xdr_stream stream; - struct xdr_buf buf = { - .pages = lgr->layoutp->pages, - .page_len = lgr->layoutp->len, - .buflen = lgr->layoutp->len, - .len = lgr->layoutp->len, - }; + struct xdr_buf buf; struct page *scratch; __be32 *p; uint32_t nfl_util; @@ -526,7 +521,7 @@ filelayout_decode_layout(struct pnfs_layout_hdr *flo, if (!scratch) return -ENOMEM; - xdr_init_decode(&stream, &buf, NULL); + xdr_init_decode_pages(&stream, &buf, lgr->layoutp->pages, lgr->layoutp->len); xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); /* 20 = ufl_util (4), first_stripe_index (4), pattern_offset (8), diff --git a/fs/nfs/nfs4filelayoutdev.c b/fs/nfs/nfs4filelayoutdev.c index 5914659..3b7bf13 100644 --- a/fs/nfs/nfs4filelayoutdev.c +++ b/fs/nfs/nfs4filelayoutdev.c @@ -308,12 +308,7 @@ decode_device(struct inode *ino, struct pnfs_device *pdev, gfp_t gfp_flags) u8 max_stripe_index; struct nfs4_file_layout_dsaddr *dsaddr = NULL; struct xdr_stream stream; - struct xdr_buf buf = { - .pages = pdev->pages, - .page_len = pdev->pglen, - .buflen = pdev->pglen, - .len = pdev->pglen, - }; + struct xdr_buf buf; struct page *scratch; /* set up xdr stream */ @@ -321,7 +316,7 @@ decode_device(struct inode *ino, struct pnfs_device *pdev, gfp_t gfp_flags) if (!scratch) goto out_err; - xdr_init_decode(&stream, &buf, NULL); + xdr_init_decode_pages(&stream, &buf, pdev->pages, pdev->pglen); xdr_set_scratch_buffer(&stream, page_address(scratch), PAGE_SIZE); /* Get the stripe count (number of stripe index) */ diff --git a/include/linux/sunrpc/xdr.h b/include/linux/sunrpc/xdr.h index fc84b7a..a20970e 100644 --- a/include/linux/sunrpc/xdr.h +++ b/include/linux/sunrpc/xdr.h @@ -216,6 +216,8 @@ extern __be32 *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes); extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages, unsigned int base, unsigned int len); extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p); +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); extern __be32 *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes); extern void xdr_read_pages(struct xdr_stream *xdr, unsigned int len); diff --git a/net/sunrpc/xdr.c b/net/sunrpc/xdr.c index 679cd67..f008c14 100644 --- a/net/sunrpc/xdr.c +++ b/net/sunrpc/xdr.c @@ -638,6 +638,25 @@ void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, __be32 *p) } EXPORT_SYMBOL_GPL(xdr_init_decode); +/** + * xdr_init_decode - Initialize an xdr_stream for decoding data. + * @xdr: pointer to xdr_stream struct + * @buf: pointer to XDR buffer from which to decode data + * @pages: list of pages to decode into + * @len: length in bytes of buffer in pages + */ +void xdr_init_decode_pages(struct xdr_stream *xdr, struct xdr_buf *buf, + struct page **pages, unsigned int len) +{ + memset(buf, 0, sizeof(*buf)); + buf->pages = pages; + buf->page_len = len; + buf->buflen = len; + buf->len = len; + xdr_init_decode(xdr, buf, NULL); +} +EXPORT_SYMBOL_GPL(xdr_init_decode_pages); + static __be32 * __xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes) { __be32 *p = xdr->p;