Return-Path: linux-nfs-owner@vger.kernel.org Received: from casper.infradead.org ([85.118.1.10]:57762 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756126AbaDPNFP (ORCPT ); Wed, 16 Apr 2014 09:05:15 -0400 From: Christoph Hellwig To: Trond Myklebust Cc: Anna Schumaker , linux-nfs@vger.kernel.org Subject: [PATCH 1/2] nfs: remove ->write_pageio_init from rpc ops Date: Wed, 16 Apr 2014 15:07:21 +0200 Message-Id: <1397653642-17833-2-git-send-email-hch@lst.de> In-Reply-To: <1397653642-17833-1-git-send-email-hch@lst.de> References: <1397653642-17833-1-git-send-email-hch@lst.de> Sender: linux-nfs-owner@vger.kernel.org List-ID: The write_pageio_init method is just a very convoluted way to grab the right nfs_pageio_ops vector. The vector to chose is not a choice of protocol version, but just a pNFS vs MDS I/O choice that can simply be done inside nfs_pageio_init_write based on the presence of a layout driver, and a new force_mds flag to the special case of falling back to MDS I/O on a pNFS-capable volume. Signed-off-by: Christoph Hellwig --- fs/nfs/direct.c | 4 ++-- fs/nfs/internal.h | 2 +- fs/nfs/nfs3proc.c | 1 - fs/nfs/nfs4proc.c | 1 - fs/nfs/pnfs.c | 16 +--------------- fs/nfs/pnfs.h | 8 -------- fs/nfs/proc.c | 1 - fs/nfs/write.c | 21 +++++++++++++-------- include/linux/nfs_xdr.h | 2 -- 9 files changed, 17 insertions(+), 39 deletions(-) diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index b8797ae..6a31102 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -564,7 +564,7 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq) dreq->count = 0; get_dreq(dreq); - NFS_PROTO(dreq->inode)->write_pageio_init(&desc, dreq->inode, FLUSH_STABLE, + nfs_pageio_init_write(&desc, dreq->inode, FLUSH_STABLE, false, &nfs_direct_write_completion_ops); desc.pg_dreq = dreq; @@ -874,7 +874,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq, size_t requested_bytes = 0; unsigned long seg; - NFS_PROTO(inode)->write_pageio_init(&desc, inode, FLUSH_COND_STABLE, + nfs_pageio_init_write(&desc, inode, FLUSH_COND_STABLE, false, &nfs_direct_write_completion_ops); desc.pg_dreq = dreq; get_dreq(dreq); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index dd8bfc2..8431083 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -422,7 +422,7 @@ int nfs_remount(struct super_block *sb, int *flags, char *raw_data); /* write.c */ extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, - struct inode *inode, int ioflags, + struct inode *inode, int ioflags, bool force_mds, const struct nfs_pgio_completion_ops *compl_ops); extern struct nfs_write_header *nfs_writehdr_alloc(void); extern void nfs_writehdr_free(struct nfs_pgio_header *hdr); diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c index db60149..e984880 100644 --- a/fs/nfs/nfs3proc.c +++ b/fs/nfs/nfs3proc.c @@ -951,7 +951,6 @@ const struct nfs_rpc_ops nfs_v3_clientops = { .read_rpc_prepare = nfs3_proc_read_rpc_prepare, .read_done = nfs3_read_done, .write_setup = nfs3_proc_write_setup, - .write_pageio_init = nfs_pageio_init_write, .write_rpc_prepare = nfs3_proc_write_rpc_prepare, .write_done = nfs3_write_done, .commit_setup = nfs3_proc_commit_setup, diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 397be39..8da0c62 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -8437,7 +8437,6 @@ const struct nfs_rpc_ops nfs_v4_clientops = { .read_rpc_prepare = nfs4_proc_read_rpc_prepare, .read_done = nfs4_read_done, .write_setup = nfs4_proc_write_setup, - .write_pageio_init = pnfs_pageio_init_write, .write_rpc_prepare = nfs4_proc_write_rpc_prepare, .write_done = nfs4_write_done, .commit_setup = nfs4_proc_commit_setup, diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index cb53d45..9edac9f 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1447,20 +1447,6 @@ pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode, nfs_pageio_init(pgio, inode, ld->pg_read_ops, compl_ops, server->rsize, 0); } -void -pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, - int ioflags, - const struct nfs_pgio_completion_ops *compl_ops) -{ - struct nfs_server *server = NFS_SERVER(inode); - struct pnfs_layoutdriver_type *ld = server->pnfs_curr_ld; - - if (ld == NULL) - nfs_pageio_init_write(pgio, inode, ioflags, compl_ops); - else - nfs_pageio_init(pgio, inode, ld->pg_write_ops, compl_ops, server->wsize, ioflags); -} - bool pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req) @@ -1496,7 +1482,7 @@ int pnfs_write_done_resend_to_mds(struct inode *inode, LIST_HEAD(failed); /* Resend all requests through the MDS */ - nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, compl_ops); + nfs_pageio_init_write(&pgio, inode, FLUSH_STABLE, true, compl_ops); pgio.pg_dreq = dreq; while (!list_empty(head)) { struct nfs_page *req = nfs_list_entry(head->next); diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index 0237939..e9ac8fb 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -182,8 +182,6 @@ void pnfs_put_lseg(struct pnfs_layout_segment *lseg); void pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *, const struct nfs_pgio_completion_ops *); -void pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *, - int, const struct nfs_pgio_completion_ops *); void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); void unset_pnfs_layoutdriver(struct nfs_server *); @@ -467,12 +465,6 @@ static inline void pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, str nfs_pageio_init_read(pgio, inode, compl_ops); } -static inline void pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode, int ioflags, - const struct nfs_pgio_completion_ops *compl_ops) -{ - nfs_pageio_init_write(pgio, inode, ioflags, compl_ops); -} - static inline int pnfs_commit_list(struct inode *inode, struct list_head *mds_pages, int how, struct nfs_commit_info *cinfo) diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c index e55ce9e..f9cc295 100644 --- a/fs/nfs/proc.c +++ b/fs/nfs/proc.c @@ -739,7 +739,6 @@ const struct nfs_rpc_ops nfs_v2_clientops = { .read_rpc_prepare = nfs_proc_read_rpc_prepare, .read_done = nfs_read_done, .write_setup = nfs_proc_write_setup, - .write_pageio_init = nfs_pageio_init_write, .write_rpc_prepare = nfs_proc_write_rpc_prepare, .write_done = nfs_write_done, .commit_setup = nfs_proc_commit_setup, diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 9a3b6a4..0bd1724 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -354,10 +354,8 @@ static int nfs_writepage_locked(struct page *page, struct writeback_control *wbc struct nfs_pageio_descriptor pgio; int err; - NFS_PROTO(page_file_mapping(page)->host)->write_pageio_init(&pgio, - page->mapping->host, - wb_priority(wbc), - &nfs_async_write_completion_ops); + nfs_pageio_init_write(&pgio, page->mapping->host, wb_priority(wbc), + false, &nfs_async_write_completion_ops); err = nfs_do_writepage(page, wbc, &pgio); nfs_pageio_complete(&pgio); if (err < 0) @@ -400,7 +398,8 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc) nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES); - NFS_PROTO(inode)->write_pageio_init(&pgio, inode, wb_priority(wbc), &nfs_async_write_completion_ops); + nfs_pageio_init_write(&pgio, inode, wb_priority(wbc), false, + &nfs_async_write_completion_ops); err = write_cache_pages(mapping, wbc, nfs_writepages_callback, &pgio); nfs_pageio_complete(&pgio); @@ -1282,11 +1281,17 @@ static const struct nfs_pageio_ops nfs_pageio_write_ops = { }; void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, - struct inode *inode, int ioflags, + struct inode *inode, int ioflags, bool force_mds, const struct nfs_pgio_completion_ops *compl_ops) { - nfs_pageio_init(pgio, inode, &nfs_pageio_write_ops, compl_ops, - NFS_SERVER(inode)->wsize, ioflags); + struct nfs_server *server = NFS_SERVER(inode); + const struct nfs_pageio_ops *pg_ops = &nfs_pageio_write_ops; + +#ifdef CONFIG_NFS_V4_1 + if (server->pnfs_curr_ld && !force_mds) + pg_ops = server->pnfs_curr_ld->pg_write_ops; +#endif + nfs_pageio_init(pgio, inode, pg_ops, compl_ops, server->wsize, ioflags); } EXPORT_SYMBOL_GPL(nfs_pageio_init_write); diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 6fb5b23..78216f8 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1471,8 +1471,6 @@ struct nfs_rpc_ops { int (*read_rpc_prepare)(struct rpc_task *, struct nfs_read_data *); int (*read_done) (struct rpc_task *, struct nfs_read_data *); void (*write_setup) (struct nfs_write_data *, struct rpc_message *); - void (*write_pageio_init)(struct nfs_pageio_descriptor *, struct inode *, int, - const struct nfs_pgio_completion_ops *); int (*write_rpc_prepare)(struct rpc_task *, struct nfs_write_data *); int (*write_done) (struct rpc_task *, struct nfs_write_data *); void (*commit_setup) (struct nfs_commit_data *, struct rpc_message *); -- 1.7.10.4