diff options
Diffstat (limited to 'fs/nfs/pnfs.c')
| -rw-r--r-- | fs/nfs/pnfs.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 77966ec..86c154b 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -30,6 +30,7 @@ #include <linux/nfs_fs.h> #include "internal.h" #include "pnfs.h" +#include "iostat.h" #define NFSDBG_FACILITY NFSDBG_PNFS @@ -880,6 +881,33 @@ pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode) } /* + * Call the appropriate parallel I/O subsystem read function. + */ +enum pnfs_try_status +pnfs_try_to_read_data(struct nfs_read_data *rdata, + const struct rpc_call_ops *call_ops) +{ + struct inode *inode = rdata->inode; + struct nfs_server *nfss = NFS_SERVER(inode); + enum pnfs_try_status trypnfs; + + rdata->mds_ops = call_ops; + + dprintk("%s: Reading ino:%lu %u@%llu\n", + __func__, inode->i_ino, rdata->args.count, rdata->args.offset); + + trypnfs = nfss->pnfs_curr_ld->read_pagelist(rdata); + if (trypnfs == PNFS_NOT_ATTEMPTED) { + put_lseg(rdata->lseg); + rdata->lseg = NULL; + } else { + nfs_inc_stats(inode, NFSIOS_PNFS_READ); + } + dprintk("%s End (trypnfs:%d)\n", __func__, trypnfs); + return trypnfs; +} + +/* * Device ID cache. Currently supports one layout type per struct nfs_client. * Add layout type to the lookup key to expand to support multiple types. */ |