diff options
| -rw-r--r-- | fs/nfs/internal.h | 2 | ||||
| -rw-r--r-- | fs/nfs/nfs4_fs.h | 3 | ||||
| -rw-r--r-- | fs/nfs/nfs4filelayout.c | 82 | ||||
| -rw-r--r-- | fs/nfs/nfs4proc.c | 3 | ||||
| -rw-r--r-- | fs/nfs/read.c | 3 | ||||
| -rw-r--r-- | include/linux/nfs_xdr.h | 1 |
6 files changed, 92 insertions, 2 deletions
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index 5cc92014259..5e9df992cd7 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -271,6 +271,8 @@ extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh); #endif /* read.c */ +extern int nfs_initiate_read(struct nfs_read_data *data, struct rpc_clnt *clnt, + const struct rpc_call_ops *call_ops); extern void nfs_read_prepare(struct rpc_task *task, void *calldata); /* write.c */ diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h index 7058a9f75e7..c64be1cff08 100644 --- a/fs/nfs/nfs4_fs.h +++ b/fs/nfs/nfs4_fs.h @@ -252,6 +252,9 @@ static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *ser extern int nfs4_setup_sequence(const struct nfs_server *server, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, int cache_reply, struct rpc_task *task); +extern int nfs41_setup_sequence(struct nfs4_session *session, + struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, + int cache_reply, struct rpc_task *task); extern void nfs4_destroy_session(struct nfs4_session *session); extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp); extern int nfs4_proc_create_session(struct nfs_client *); diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c index ed833705dce..3608411653d 100644 --- a/fs/nfs/nfs4filelayout.c +++ b/fs/nfs/nfs4filelayout.c @@ -101,6 +101,87 @@ filelayout_get_dserver_offset(struct pnfs_layout_segment *lseg, loff_t offset) } /* + * Call ops for the async read/write cases + * In the case of dense layouts, the offset needs to be reset to its + * original value. + */ +static void filelayout_read_prepare(struct rpc_task *task, void *data) +{ + struct nfs_read_data *rdata = (struct nfs_read_data *)data; + + if (nfs41_setup_sequence(rdata->ds_clp->cl_session, + &rdata->args.seq_args, &rdata->res.seq_res, + 0, task)) + return; + + rpc_call_start(task); +} + +static void filelayout_read_call_done(struct rpc_task *task, void *data) +{ + struct nfs_read_data *rdata = (struct nfs_read_data *)data; + + dprintk("--> %s task->tk_status %d\n", __func__, task->tk_status); + + /* Note this may cause RPC to be resent */ + rdata->mds_ops->rpc_call_done(task, data); +} + +static void filelayout_read_release(void *data) +{ + struct nfs_read_data *rdata = (struct nfs_read_data *)data; + + rdata->mds_ops->rpc_release(data); +} + +struct rpc_call_ops filelayout_read_call_ops = { + .rpc_call_prepare = filelayout_read_prepare, + .rpc_call_done = filelayout_read_call_done, + .rpc_release = filelayout_read_release, +}; + +static enum pnfs_try_status +filelayout_read_pagelist(struct nfs_read_data *data) +{ + struct pnfs_layout_segment *lseg = data->lseg; + struct nfs4_pnfs_ds *ds; + loff_t offset = data->args.offset; + u32 j, idx; + struct nfs_fh *fh; + int status; + + dprintk("--> %s ino %lu pgbase %u req %Zu@%llu\n", + __func__, data->inode->i_ino, + data->args.pgbase, (size_t)data->args.count, offset); + + /* Retrieve the correct rpc_client for the byte range */ + j = nfs4_fl_calc_j_index(lseg, offset); + idx = nfs4_fl_calc_ds_index(lseg, j); + ds = nfs4_fl_prepare_ds(lseg, idx); + if (!ds) { + printk(KERN_ERR "%s: prepare_ds failed, use MDS\n", __func__); + return PNFS_NOT_ATTEMPTED; + } + dprintk("%s USE DS:ip %x %hu\n", __func__, + ntohl(ds->ds_ip_addr), ntohs(ds->ds_port)); + + /* No multipath support. Use first DS */ + data->ds_clp = ds->ds_clp; + fh = nfs4_fl_select_ds_fh(lseg, j); + if (fh) + data->args.fh = fh; + + data->args.offset = filelayout_get_dserver_offset(lseg, offset); + data->mds_offset = offset; + + /* Perform an asynchronous read to ds */ + status = nfs_initiate_read(data, ds->ds_clp->cl_rpcclient, + &filelayout_read_call_ops); + BUG_ON(status != 0); + return PNFS_ATTEMPTED; +} + +/* * filelayout_check_layout() * * Make sure layout segment parameters are sane WRT the device. @@ -320,6 +401,7 @@ static struct pnfs_layoutdriver_type filelayout_type = { .alloc_lseg = filelayout_alloc_lseg, .free_lseg = filelayout_free_lseg, .pg_test = filelayout_pg_test, + .read_pagelist = filelayout_read_pagelist, }; static int __init nfs4filelayout_init(void) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 07d1a43f40f..d0962393330 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -505,7 +505,7 @@ out: return ret_id; } -static int nfs41_setup_sequence(struct nfs4_session *session, +int nfs41_setup_sequence(struct nfs4_session *session, struct nfs4_sequence_args *args, struct nfs4_sequence_res *res, int cache_reply, @@ -571,6 +571,7 @@ static int nfs41_setup_sequence(struct nfs4_session *session, res->sr_status = 1; return 0; } +EXPORT_SYMBOL_GPL(nfs41_setup_sequence); int nfs4_setup_sequence(const struct nfs_server *server, struct nfs4_sequence_args *args, diff --git a/fs/nfs/read.c b/fs/nfs/read.c index 4127a1c0eec..f4d0fcffcb5 100644 --- a/fs/nfs/read.c +++ b/fs/nfs/read.c @@ -157,7 +157,7 @@ static void nfs_readpage_release(struct nfs_page *req) nfs_release_request(req); } -static int nfs_initiate_read(struct nfs_read_data *data, struct rpc_clnt *clnt, +int nfs_initiate_read(struct nfs_read_data *data, struct rpc_clnt *clnt, const struct rpc_call_ops *call_ops) { struct inode *inode = data->inode; @@ -195,6 +195,7 @@ static int nfs_initiate_read(struct nfs_read_data *data, struct rpc_clnt *clnt, rpc_put_task(task); return 0; } +EXPORT_SYMBOL_GPL(nfs_initiate_read); /* * Set up the NFS read request struct diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h index c66ff7fe1b6..b63faef5052 100644 --- a/include/linux/nfs_xdr.h +++ b/include/linux/nfs_xdr.h @@ -1020,6 +1020,7 @@ struct nfs_read_data { struct pnfs_layout_segment *lseg; struct nfs_client *ds_clp; /* pNFS data server */ const struct rpc_call_ops *mds_ops; + __u64 mds_offset; struct page *page_array[NFS_PAGEVEC_SIZE]; }; |