diff options
author | Andy Adamson <andros@netapp.com> | 2011-03-03 15:13:45 +0000 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-03-11 15:38:44 -0500 |
commit | 0382b74409c6b9ef12c952b50bb44f557a361a43 (patch) | |
tree | 0eebc04006a3b70fb6605c42ee89cdc0ccd8b1cf /fs | |
parent | 44b83799a922a153957c65ccfc985a8c902958c8 (diff) | |
download | op-kernel-dev-0382b74409c6b9ef12c952b50bb44f557a361a43.zip op-kernel-dev-0382b74409c6b9ef12c952b50bb44f557a361a43.tar.gz |
NFSv4.1: implement generic pnfs layer write switch
Signed-off-by: Andy Adamson <andros@citi.umich.edu>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
Signed-off-by: Dean Hildebrand <dhildeb@us.ibm.com>
Signed-off-by: Fred Isaman <iisaman@citi.umich.edu>
Signed-off-by: J. Bruce Fields <bfields@fieldses.org>
Signed-off-by: Mike Sager <sager@netapp.com>
Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Tao Guo <guotao@nrchpc.ac.cn>
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/nfs/nfs4filelayout.c | 7 | ||||
-rw-r--r-- | fs/nfs/pnfs.c | 24 | ||||
-rw-r--r-- | fs/nfs/pnfs.h | 10 | ||||
-rw-r--r-- | fs/nfs/write.c | 4 |
4 files changed, 45 insertions, 0 deletions
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c index 0040a5e..9d21bfe 100644 --- a/fs/nfs/nfs4filelayout.c +++ b/fs/nfs/nfs4filelayout.c @@ -238,6 +238,12 @@ filelayout_read_pagelist(struct nfs_read_data *data) return PNFS_ATTEMPTED; } +static enum pnfs_try_status +filelayout_write_pagelist(struct nfs_write_data *data, int sync) +{ + return PNFS_NOT_ATTEMPTED; +} + /* * filelayout_check_layout() * @@ -455,6 +461,7 @@ static struct pnfs_layoutdriver_type filelayout_type = { .free_lseg = filelayout_free_lseg, .pg_test = filelayout_pg_test, .read_pagelist = filelayout_read_pagelist, + .write_pagelist = filelayout_write_pagelist, }; static int __init nfs4filelayout_init(void) diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 5f205d3..f38813a 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -895,6 +895,30 @@ pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode) pgio->pg_test = (ld && ld->pg_test) ? pnfs_write_pg_test : NULL; } +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) { + put_lseg(wdata->lseg); + wdata->lseg = NULL; + } 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 1d4e631..6380b94 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -79,6 +79,7 @@ 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 { @@ -120,6 +121,8 @@ 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 *); @@ -200,6 +203,13 @@ 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 49c4784..df99c5b 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); } |