Return-Path: Received: from mx2.netapp.com ([216.240.18.37]:26986 "EHLO mx2.netapp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757328Ab1BKQzB (ORCPT ); Fri, 11 Feb 2011 11:55:01 -0500 Received: from localhost.localdomain (manjua-lxp.hq.netapp.com [10.58.49.248] (may be forged)) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id p1BGshZ8002533 for ; Fri, 11 Feb 2011 08:54:46 -0800 (PST) From: Fred Isaman To: linux-nfs@vger.kernel.org Subject: [PATCH 5/7] wave4: implement pnfs_try_to_write_data Date: Fri, 11 Feb 2011 11:54:37 -0500 Message-Id: <1297443279-19813-6-git-send-email-iisaman@netapp.com> In-Reply-To: <1297443279-19813-1-git-send-email-iisaman@netapp.com> References: <1297443279-19813-1-git-send-email-iisaman@netapp.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: Content-Type: text/plain MIME-Version: 1.0 From: The pNFS Team split from "pnfs_submit: generic write" and modified Signed-off-by: Andy Adamson Signed-off-by: Boaz Harrosh Signed-off-by: Dean Hildebrand Signed-off-by: Fred Isaman Signed-off-by: J. Bruce Fields Signed-off-by: Mike Sager Signed-off-by: Ricardo Labiaga Signed-off-by: Tao Guo Signed-off-by: Andy Adamson Signed-off-by: Benny Halevy Signed-off-by: Fred Isaman --- fs/nfs/pnfs.c | 24 ++++++++++++++++++++++++ fs/nfs/pnfs.h | 11 +++++++++++ fs/nfs/write.c | 4 ++++ include/linux/nfs_iostat.h | 1 + include/linux/nfs_xdr.h | 1 + 5 files changed, 41 insertions(+), 0 deletions(-) diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 912b1ff..9d2351a 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -892,6 +892,30 @@ pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, pnfs_set_pg_test(inode, pgio); } +enum pnfs_try_status +pnfs_try_to_write_data(struct nfs_write_data *wdata, + const struct rpc_call_ops *call_ops, int how) +{ + struct inode *inode = wdata->inode; + enum pnfs_try_status trypnfs; + struct nfs_server *nfss = NFS_SERVER(inode); + + wdata->mds_ops = call_ops; + + dprintk("%s: Writing ino:%lu %u@%llu (how %d)\n", __func__, + inode->i_ino, wdata->args.count, wdata->args.offset, how); + + trypnfs = nfss->pnfs_curr_ld->write_pagelist(wdata, how); + if (trypnfs == PNFS_NOT_ATTEMPTED) { + wdata->lseg = NULL; + put_lseg(wdata->lseg); + } else + nfs_inc_stats(inode, NFSIOS_PNFS_WRITE); + + dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); + return trypnfs; +} + /* * Call the appropriate parallel I/O subsystem read function. */ diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index d2d708a..50bcb1f 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -81,6 +81,8 @@ struct pnfs_layoutdriver_type { * I/O, else return PNFS_NOT_ATTEMPTED to fall back to normal NFS */ enum pnfs_try_status (*read_pagelist) (struct nfs_read_data *nfs_data); + enum pnfs_try_status + (*write_pagelist) (struct nfs_write_data *nfs_data, int how); }; struct pnfs_layout_hdr { @@ -172,6 +174,8 @@ pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, enum pnfs_iomode access_type); void set_pnfs_layoutdriver(struct nfs_server *, u32 id); void unset_pnfs_layoutdriver(struct nfs_server *); +enum pnfs_try_status pnfs_try_to_write_data(struct nfs_write_data *, + const struct rpc_call_ops *, int); enum pnfs_try_status pnfs_try_to_read_data(struct nfs_read_data *, const struct rpc_call_ops *); void pnfs_pageio_init_read(struct nfs_pageio_descriptor *, struct inode *); @@ -250,6 +254,13 @@ pnfs_try_to_read_data(struct nfs_read_data *data, return PNFS_NOT_ATTEMPTED; } +static inline enum pnfs_try_status +pnfs_try_to_write_data(struct nfs_write_data *data, + const struct rpc_call_ops *call_ops, int how) +{ + return PNFS_NOT_ATTEMPTED; +} + static inline bool pnfs_roc(struct inode *ino) { diff --git a/fs/nfs/write.c b/fs/nfs/write.c index fa92fad..24cc34d 100644 --- a/fs/nfs/write.c +++ b/fs/nfs/write.c @@ -873,6 +873,10 @@ static int nfs_write_rpcsetup(struct nfs_page *req, data->res.verf = &data->verf; nfs_fattr_init(&data->fattr); + if (data->lseg && + (pnfs_try_to_write_data(data, call_ops, how) == PNFS_ATTEMPTED)) + return 0; + return nfs_initiate_write(data, NFS_CLIENT(inode), call_ops, how); } diff --git a/include/linux/nfs_iostat.h b/include/linux/nfs_iostat.h index 37a1437..8866bb3 100644 --- a/include/linux/nfs_iostat.h +++ b/include/linux/nfs_iostat.h @@ -114,6 +114,7 @@ enum nfs_stat_eventcounters { NFSIOS_SHORTWRITE, NFSIOS_DELAY, NFSIOS_PNFS_READ, + NFSIOS_PNFS_WRITE, __NFSIOS_COUNTSMAX, }; diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index 23feaf6..9ff26f9 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1040,6 +1040,7 @@ struct nfs_write_data { struct nfs_writeres res; /* result struct */ struct pnfs_layout_segment *lseg; struct nfs_client *ds_clp; /* pNFS data server */ + const struct rpc_call_ops *mds_ops; int (*write_done_cb) (struct rpc_task *task, struct nfs_write_data *data); #ifdef CONFIG_NFS_V4 unsigned long timestamp; /* For lease renewal */ -- 1.7.2.1