From patchwork Thu Jun 5 19:16:26 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Weston Andros Adamson X-Patchwork-Id: 4308281 Return-Path: X-Original-To: patchwork-linux-nfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id EB1C89F163 for ; Thu, 5 Jun 2014 19:16:41 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 87C1F202BE for ; Thu, 5 Jun 2014 19:16:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E060620320 for ; Thu, 5 Jun 2014 19:16:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751799AbaFETQh (ORCPT ); Thu, 5 Jun 2014 15:16:37 -0400 Received: from mail-ie0-f169.google.com ([209.85.223.169]:52057 "EHLO mail-ie0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751405AbaFETQg (ORCPT ); Thu, 5 Jun 2014 15:16:36 -0400 Received: by mail-ie0-f169.google.com with SMTP id rp18so1341056iec.28 for ; Thu, 05 Jun 2014 12:16:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=e1N+Wj+NEZ/AZFTVA5QYdw0fpNxDH7QlX12QqWrtjdM=; b=IXVE384QQrCW795cocwCeKIUawBpFG2LCecipZzbz+hHZecRZpZ1PhwH0eIRYhL8Ur 9agRjSuOA8bBnSFwkBkMTJHp4wTp6xSHZuAb4I/j+8jmg7WcG8Emx95DeWqWkRAq44wI qeqnC5hpGXGBzo8g/RZh3PzcsoSyaLtICgZc2FNtrpYDQ5uADYrDxKJi0+u9r70HE8SQ Nd/3rTdFQlZvAMP1zUAKn8+J0CdnYdNMZNZdj+HgsVEnFHdN0k8YhBZiMZBUex5Xnl40 F/Ch8rz2acO09HS8OF7UjCLLtMquhS+wZ99Ni2Qp9vHv2TLd7iYDIb8CLGHnN1VEUJ/V J/Lw== X-Gm-Message-State: ALoCoQmqNSlvBsB2hvHdyjCxIM/fvrel1q/i3CS1mScYbtpe8aoi9PA2nHqArZtbnLcJC9Gx0zM+ X-Received: by 10.43.11.198 with SMTP id pf6mr450777icb.10.1401995795967; Thu, 05 Jun 2014 12:16:35 -0700 (PDT) Received: from gavrio-wifi.robotsandstuff.fake (c-98-209-19-144.hsd1.mi.comcast.net. [98.209.19.144]) by mx.google.com with ESMTPSA id l9sm20575175igx.7.2014.06.05.12.16.35 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Thu, 05 Jun 2014 12:16:35 -0700 (PDT) From: Weston Andros Adamson To: trond.myklebust@primarydata.com Cc: linux-nfs@vger.kernel.org, Weston Andros Adamson Subject: [PATCH v2 1/6] nfs: move nfs_pgio_data and remove nfs_rw_header Date: Thu, 5 Jun 2014 15:16:26 -0400 Message-Id: <1401995791-40213-2-git-send-email-dros@primarydata.com> X-Mailer: git-send-email 1.8.5.2 (Apple Git-48) In-Reply-To: <1401995791-40213-1-git-send-email-dros@primarydata.com> References: <1401995791-40213-1-git-send-email-dros@primarydata.com> Sender: linux-nfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP nfs_rw_header was used to allocate an nfs_pgio_header along with an nfs_pgio_data, because a _header would need at least one _data. Now there is only ever one nfs_pgio_data for each nfs_pgio_header -- move it to nfs_pgio_header and get rid of nfs_rw_header. Signed-off-by: Weston Andros Adamson Reviewed-by: Christoph Hellwig --- fs/nfs/direct.c | 8 ++--- fs/nfs/internal.h | 6 ++-- fs/nfs/pagelist.c | 94 +++++++++++++++--------------------------------- fs/nfs/pnfs.c | 24 ++++++------- fs/nfs/read.c | 6 ++-- fs/nfs/write.c | 10 +++--- include/linux/nfs_page.h | 4 +-- include/linux/nfs_xdr.h | 38 +++++++++----------- 8 files changed, 71 insertions(+), 119 deletions(-) diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c index 4ad7bc3..8a55f59 100644 --- a/fs/nfs/direct.c +++ b/fs/nfs/direct.c @@ -148,8 +148,8 @@ static void nfs_direct_set_hdr_verf(struct nfs_direct_req *dreq, { struct nfs_writeverf *verfp; - verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp, - hdr->data->ds_idx); + verfp = nfs_direct_select_verf(dreq, hdr->data.ds_clp, + hdr->data.ds_idx); WARN_ON_ONCE(verfp->committed >= 0); memcpy(verfp, &hdr->verf, sizeof(struct nfs_writeverf)); WARN_ON_ONCE(verfp->committed < 0); @@ -169,8 +169,8 @@ static int nfs_direct_set_or_cmp_hdr_verf(struct nfs_direct_req *dreq, { struct nfs_writeverf *verfp; - verfp = nfs_direct_select_verf(dreq, hdr->data->ds_clp, - hdr->data->ds_idx); + verfp = nfs_direct_select_verf(dreq, hdr->data.ds_clp, + hdr->data.ds_idx); if (verfp->committed < 0) { nfs_direct_set_hdr_verf(dreq, hdr); return 0; diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 8b69cba..7d83a25 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -238,9 +238,9 @@ void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos); int nfs_iocounter_wait(struct nfs_io_counter *c); extern const struct nfs_pageio_ops nfs_pgio_rw_ops; -struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *); -void nfs_rw_header_free(struct nfs_pgio_header *); -void nfs_pgio_data_release(struct nfs_pgio_data *); +struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *); +void nfs_pgio_header_free(struct nfs_pgio_header *); +void nfs_pgio_data_destroy(struct nfs_pgio_data *); int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *); int nfs_initiate_pgio(struct rpc_clnt *, struct nfs_pgio_data *, const struct rpc_call_ops *, int, int); diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index a875982..509d009 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -452,95 +452,61 @@ size_t nfs_generic_pg_test(struct nfs_pageio_descriptor *desc, } EXPORT_SYMBOL_GPL(nfs_generic_pg_test); -static inline struct nfs_rw_header *NFS_RW_HEADER(struct nfs_pgio_header *hdr) +struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *ops) { - return container_of(hdr, struct nfs_rw_header, header); -} - -/** - * nfs_rw_header_alloc - Allocate a header for a read or write - * @ops: Read or write function vector - */ -struct nfs_rw_header *nfs_rw_header_alloc(const struct nfs_rw_ops *ops) -{ - struct nfs_rw_header *header = ops->rw_alloc_header(); - - if (header) { - struct nfs_pgio_header *hdr = &header->header; + struct nfs_pgio_header *hdr = ops->rw_alloc_header(); + if (hdr) { INIT_LIST_HEAD(&hdr->pages); spin_lock_init(&hdr->lock); atomic_set(&hdr->refcnt, 0); hdr->rw_ops = ops; } - return header; + return hdr; } -EXPORT_SYMBOL_GPL(nfs_rw_header_alloc); +EXPORT_SYMBOL_GPL(nfs_pgio_header_alloc); /* - * nfs_rw_header_free - Free a read or write header + * nfs_pgio_header_free - Free a read or write header * @hdr: The header to free */ -void nfs_rw_header_free(struct nfs_pgio_header *hdr) +void nfs_pgio_header_free(struct nfs_pgio_header *hdr) { - hdr->rw_ops->rw_free_header(NFS_RW_HEADER(hdr)); + hdr->rw_ops->rw_free_header(hdr); } -EXPORT_SYMBOL_GPL(nfs_rw_header_free); +EXPORT_SYMBOL_GPL(nfs_pgio_header_free); /** * nfs_pgio_data_alloc - Allocate pageio data * @hdr: The header making a request * @pagecount: Number of pages to create */ -static struct nfs_pgio_data *nfs_pgio_data_alloc(struct nfs_pgio_header *hdr, - unsigned int pagecount) +static bool nfs_pgio_data_init(struct nfs_pgio_header *hdr, + unsigned int pagecount) { - struct nfs_pgio_data *data, *prealloc; - - prealloc = &NFS_RW_HEADER(hdr)->rpc_data; - if (prealloc->header == NULL) - data = prealloc; - else - data = kzalloc(sizeof(*data), GFP_KERNEL); - if (!data) - goto out; - - if (nfs_pgarray_set(&data->pages, pagecount)) { - data->header = hdr; + if (nfs_pgarray_set(&hdr->data.pages, pagecount)) { + hdr->data.header = hdr; atomic_inc(&hdr->refcnt); - } else { - if (data != prealloc) - kfree(data); - data = NULL; + return true; } -out: - return data; + return false; } /** - * nfs_pgio_data_release - Properly free pageio data - * @data: The data to release + * nfs_pgio_data_destroy - Properly free pageio data + * @data: The data to destroy */ -void nfs_pgio_data_release(struct nfs_pgio_data *data) +void nfs_pgio_data_destroy(struct nfs_pgio_data *data) { struct nfs_pgio_header *hdr = data->header; - struct nfs_rw_header *pageio_header = NFS_RW_HEADER(hdr); put_nfs_open_context(data->args.context); if (data->pages.pagevec != data->pages.page_array) kfree(data->pages.pagevec); - if (data == &pageio_header->rpc_data) { - data->header = NULL; - data = NULL; - } if (atomic_dec_and_test(&hdr->refcnt)) hdr->completion_ops->completion(hdr); - /* Note: we only free the rpc_task after callbacks are done. - * See the comment in rpc_free_task() for why - */ - kfree(data); } -EXPORT_SYMBOL_GPL(nfs_pgio_data_release); +EXPORT_SYMBOL_GPL(nfs_pgio_data_destroy); /** * nfs_pgio_rpcsetup - Set up arguments for a pageio call @@ -655,8 +621,7 @@ static int nfs_pgio_error(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) { set_bit(NFS_IOHDR_REDO, &hdr->flags); - nfs_pgio_data_release(hdr->data); - hdr->data = NULL; + nfs_pgio_data_destroy(&hdr->data); desc->pg_completion_ops->error_cleanup(&desc->pg_list); return -ENOMEM; } @@ -670,7 +635,7 @@ static void nfs_pgio_release(void *calldata) struct nfs_pgio_data *data = calldata; if (data->header->rw_ops->rw_release) data->header->rw_ops->rw_release(data); - nfs_pgio_data_release(data); + nfs_pgio_data_destroy(data); } /** @@ -746,11 +711,11 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc, struct list_head *head = &desc->pg_list; struct nfs_commit_info cinfo; - data = nfs_pgio_data_alloc(hdr, nfs_page_array_len(desc->pg_base, - desc->pg_count)); - if (!data) + if (!nfs_pgio_data_init(hdr, nfs_page_array_len(desc->pg_base, + desc->pg_count))) return nfs_pgio_error(desc, hdr); + data = &hdr->data; nfs_init_cinfo(&cinfo, desc->pg_inode, desc->pg_dreq); pages = data->pages.pagevec; while (!list_empty(head)) { @@ -766,7 +731,6 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc, /* Set up the argument struct */ nfs_pgio_rpcsetup(data, desc->pg_count, 0, desc->pg_ioflags, &cinfo); - hdr->data = data; desc->pg_rpc_callops = &nfs_pgio_common_ops; return 0; } @@ -774,22 +738,20 @@ EXPORT_SYMBOL_GPL(nfs_generic_pgio); static int nfs_generic_pg_pgios(struct nfs_pageio_descriptor *desc) { - struct nfs_rw_header *rw_hdr; struct nfs_pgio_header *hdr; int ret; - rw_hdr = nfs_rw_header_alloc(desc->pg_rw_ops); - if (!rw_hdr) { + hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); + if (!hdr) { desc->pg_completion_ops->error_cleanup(&desc->pg_list); return -ENOMEM; } - hdr = &rw_hdr->header; - nfs_pgheader_init(desc, hdr, nfs_rw_header_free); + nfs_pgheader_init(desc, hdr, nfs_pgio_header_free); atomic_inc(&hdr->refcnt); ret = nfs_generic_pgio(desc, hdr); if (ret == 0) ret = nfs_initiate_pgio(NFS_CLIENT(hdr->inode), - hdr->data, desc->pg_rpc_callops, + &hdr->data, desc->pg_rpc_callops, desc->pg_ioflags, 0); if (atomic_dec_and_test(&hdr->refcnt)) hdr->completion_ops->completion(hdr); diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index ce46a41..46ecf47 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -1542,7 +1542,7 @@ pnfs_write_through_mds(struct nfs_pageio_descriptor *desc, nfs_pageio_reset_write_mds(desc); desc->pg_recoalesce = 1; } - nfs_pgio_data_release(data); + nfs_pgio_data_destroy(data); } static enum pnfs_try_status @@ -1571,7 +1571,7 @@ static void pnfs_do_write(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr, int how) { - struct nfs_pgio_data *data = hdr->data; + struct nfs_pgio_data *data = &hdr->data; const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; struct pnfs_layout_segment *lseg = desc->pg_lseg; enum pnfs_try_status trypnfs; @@ -1586,25 +1586,23 @@ pnfs_do_write(struct nfs_pageio_descriptor *desc, static void pnfs_writehdr_free(struct nfs_pgio_header *hdr) { pnfs_put_lseg(hdr->lseg); - nfs_rw_header_free(hdr); + nfs_pgio_header_free(hdr); } EXPORT_SYMBOL_GPL(pnfs_writehdr_free); int pnfs_generic_pg_writepages(struct nfs_pageio_descriptor *desc) { - struct nfs_rw_header *whdr; struct nfs_pgio_header *hdr; int ret; - whdr = nfs_rw_header_alloc(desc->pg_rw_ops); - if (!whdr) { + hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); + if (!hdr) { desc->pg_completion_ops->error_cleanup(&desc->pg_list); pnfs_put_lseg(desc->pg_lseg); desc->pg_lseg = NULL; return -ENOMEM; } - hdr = &whdr->header; nfs_pgheader_init(desc, hdr, pnfs_writehdr_free); hdr->lseg = pnfs_get_lseg(desc->pg_lseg); atomic_inc(&hdr->refcnt); @@ -1692,7 +1690,7 @@ pnfs_read_through_mds(struct nfs_pageio_descriptor *desc, nfs_pageio_reset_read_mds(desc); desc->pg_recoalesce = 1; } - nfs_pgio_data_release(data); + nfs_pgio_data_destroy(data); } /* @@ -1723,7 +1721,7 @@ pnfs_try_to_read_data(struct nfs_pgio_data *rdata, static void pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) { - struct nfs_pgio_data *data = hdr->data; + struct nfs_pgio_data *data = &hdr->data; const struct rpc_call_ops *call_ops = desc->pg_rpc_callops; struct pnfs_layout_segment *lseg = desc->pg_lseg; enum pnfs_try_status trypnfs; @@ -1738,26 +1736,24 @@ pnfs_do_read(struct nfs_pageio_descriptor *desc, struct nfs_pgio_header *hdr) static void pnfs_readhdr_free(struct nfs_pgio_header *hdr) { pnfs_put_lseg(hdr->lseg); - nfs_rw_header_free(hdr); + nfs_pgio_header_free(hdr); } EXPORT_SYMBOL_GPL(pnfs_readhdr_free); int pnfs_generic_pg_readpages(struct nfs_pageio_descriptor *desc) { - struct nfs_rw_header *rhdr; struct nfs_pgio_header *hdr; int ret; - rhdr = nfs_rw_header_alloc(desc->pg_rw_ops); - if (!rhdr) { + hdr = nfs_pgio_header_alloc(desc->pg_rw_ops); + if (!hdr) { desc->pg_completion_ops->error_cleanup(&desc->pg_list); ret = -ENOMEM; pnfs_put_lseg(desc->pg_lseg); desc->pg_lseg = NULL; return ret; } - hdr = &rhdr->header; nfs_pgheader_init(desc, hdr, pnfs_readhdr_free); hdr->lseg = pnfs_get_lseg(desc->pg_lseg); atomic_inc(&hdr->refcnt); diff --git a/fs/nfs/read.c b/fs/nfs/read.c index e818a47..d9df4ab 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -33,12 +33,12 @@ static const struct nfs_rw_ops nfs_rw_read_ops; static struct kmem_cache *nfs_rdata_cachep; -static struct nfs_rw_header *nfs_readhdr_alloc(void) +static struct nfs_pgio_header *nfs_readhdr_alloc(void) { return kmem_cache_zalloc(nfs_rdata_cachep, GFP_KERNEL); } -static void nfs_readhdr_free(struct nfs_rw_header *rhdr) +static void nfs_readhdr_free(struct nfs_pgio_header *rhdr) { kmem_cache_free(nfs_rdata_cachep, rhdr); } @@ -404,7 +404,7 @@ out: int __init nfs_init_readpagecache(void) { nfs_rdata_cachep = kmem_cache_create("nfs_read_data", - sizeof(struct nfs_rw_header), + sizeof(struct nfs_pgio_header), 0, SLAB_HWCACHE_ALIGN, NULL); if (nfs_rdata_cachep == NULL) diff --git a/fs/nfs/write.c b/fs/nfs/write.c index 17b9895..3b8892b 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -70,18 +70,18 @@ void nfs_commit_free(struct nfs_commit_data *p) } EXPORT_SYMBOL_GPL(nfs_commit_free); -static struct nfs_rw_header *nfs_writehdr_alloc(void) +static struct nfs_pgio_header *nfs_writehdr_alloc(void) { - struct nfs_rw_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO); + struct nfs_pgio_header *p = mempool_alloc(nfs_wdata_mempool, GFP_NOIO); if (p) memset(p, 0, sizeof(*p)); return p; } -static void nfs_writehdr_free(struct nfs_rw_header *whdr) +static void nfs_writehdr_free(struct nfs_pgio_header *hdr) { - mempool_free(whdr, nfs_wdata_mempool); + mempool_free(hdr, nfs_wdata_mempool); } static void nfs_context_set_write_error(struct nfs_open_context *ctx, int error) @@ -1653,7 +1653,7 @@ int nfs_migrate_page(struct address_space *mapping, struct page *newpage, int __init nfs_init_writepagecache(void) { nfs_wdata_cachep = kmem_cache_create("nfs_write_data", - sizeof(struct nfs_rw_header), + sizeof(struct nfs_pgio_header), 0, SLAB_HWCACHE_ALIGN, NULL); if (nfs_wdata_cachep == NULL) diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h index 7d9096d..4359265 100644 --- a/include/linux/nfs_page.h +++ b/include/linux/nfs_page.h @@ -62,8 +62,8 @@ struct nfs_pageio_ops { struct nfs_rw_ops { const fmode_t rw_mode; - struct nfs_rw_header *(*rw_alloc_header)(void); - void (*rw_free_header)(struct nfs_rw_header *); + struct nfs_pgio_header *(*rw_alloc_header)(void); + void (*rw_free_header)(struct nfs_pgio_header *); void (*rw_release)(struct nfs_pgio_data *); int (*rw_done)(struct rpc_task *, struct nfs_pgio_data *, struct inode *); void (*rw_result)(struct rpc_task *, struct nfs_pgio_data *); diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 9a1396e..e1c9437 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1257,13 +1257,27 @@ enum { NFS_IOHDR_NEED_RESCHED, }; -struct nfs_pgio_data; +struct nfs_pgio_data { + struct nfs_pgio_header *header; + struct list_head list; + struct rpc_task task; + struct nfs_fattr fattr; + struct nfs_writeverf verf; /* Used for writes */ + struct nfs_pgio_args args; /* argument struct */ + struct nfs_pgio_res res; /* result struct */ + unsigned long timestamp; /* For lease renewal */ + int (*pgio_done_cb)(struct rpc_task *task, struct nfs_pgio_data *data); + __u64 mds_offset; /* Filelayout dense stripe */ + struct nfs_page_array pages; + struct nfs_client *ds_clp; /* pNFS data server */ + int ds_idx; /* ds index if ds_clp is set */ +}; struct nfs_pgio_header { struct inode *inode; struct rpc_cred *cred; struct list_head pages; - struct nfs_pgio_data *data; + struct nfs_pgio_data data; atomic_t refcnt; struct nfs_page *req; struct nfs_writeverf verf; /* Used for writes */ @@ -1283,26 +1297,6 @@ struct nfs_pgio_header { unsigned long flags; }; -struct nfs_pgio_data { - struct nfs_pgio_header *header; - struct rpc_task task; - struct nfs_fattr fattr; - struct nfs_writeverf verf; /* Used for writes */ - struct nfs_pgio_args args; /* argument struct */ - struct nfs_pgio_res res; /* result struct */ - unsigned long timestamp; /* For lease renewal */ - int (*pgio_done_cb) (struct rpc_task *task, struct nfs_pgio_data *data); - __u64 mds_offset; /* Filelayout dense stripe */ - struct nfs_page_array pages; - struct nfs_client *ds_clp; /* pNFS data server */ - int ds_idx; /* ds index if ds_clp is set */ -}; - -struct nfs_rw_header { - struct nfs_pgio_header header; - struct nfs_pgio_data rpc_data; -}; - struct nfs_mds_commit_info { atomic_t rpcs_out; unsigned long ncommit;