diff options
Diffstat (limited to 'fs/nfs/nfs4filelayout.c')
-rw-r--r-- | fs/nfs/nfs4filelayout.c | 47 |
1 files changed, 45 insertions, 2 deletions
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c index d1ae5bf..51c1909 100644 --- a/fs/nfs/nfs4filelayout.c +++ b/fs/nfs/nfs4filelayout.c @@ -427,6 +427,14 @@ filelayout_check_layout(struct pnfs_layout_hdr *lo, dprintk("--> %s\n", __func__); + /* FIXME: remove this check when layout segment support is added */ + if (lgr->range.offset != 0 || + lgr->range.length != NFS4_MAX_UINT64) { + dprintk("%s Only whole file layouts supported. Use MDS i/o\n", + __func__); + goto out; + } + if (fl->pattern_offset > lgr->range.offset) { dprintk("%s pattern_offset %lld too large\n", __func__, fl->pattern_offset); @@ -679,14 +687,49 @@ filelayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, return (p_stripe == r_stripe); } +void +filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio, + struct nfs_page *req) +{ + BUG_ON(pgio->pg_lseg != NULL); + + pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, + req->wb_context, + 0, + NFS4_MAX_UINT64, + IOMODE_READ, + GFP_KERNEL); + /* If no lseg, fall back to read through mds */ + if (pgio->pg_lseg == NULL) + nfs_pageio_init_read_mds(pgio, pgio->pg_inode); +} + +void +filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio, + struct nfs_page *req) +{ + BUG_ON(pgio->pg_lseg != NULL); + + pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode, + req->wb_context, + 0, + NFS4_MAX_UINT64, + IOMODE_RW, + GFP_NOFS); + /* If no lseg, fall back to write through mds */ + if (pgio->pg_lseg == NULL) + nfs_pageio_init_write_mds(pgio, pgio->pg_inode, + pgio->pg_ioflags); +} + static const struct nfs_pageio_ops filelayout_pg_read_ops = { - .pg_init = pnfs_generic_pg_init_read, + .pg_init = filelayout_pg_init_read, .pg_test = filelayout_pg_test, .pg_doio = nfs_generic_pg_readpages, }; static const struct nfs_pageio_ops filelayout_pg_write_ops = { - .pg_init = pnfs_generic_pg_init_write, + .pg_init = filelayout_pg_init_write, .pg_test = filelayout_pg_test, .pg_doio = nfs_generic_pg_writepages, }; |