From: Andy Adamson <andros@xxxxxxxxxx>
Ask for whole file layouts. Until support for layout segments is fully
supported in the file layout code, discard non-whole file layouts.
Signed-off-by: Andy Adamson <andros@xxxxxxxxxx>
---
fs/nfs/nfs4filelayout.c | 47 +++++++++++++++++++++++++++++++++++++++++++++--
fs/nfs/pnfs.c | 6 ++++--
fs/nfs/pnfs.h | 6 ++++++
fs/nfs/read.c | 1 +
fs/nfs/write.c | 1 +
5 files changed, 57 insertions(+), 4 deletions(-)
diff --git a/fs/nfs/nfs4filelayout.c b/fs/nfs/nfs4filelayout.c
index f0414ee..8f16112 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 (fl->generic_hdr.pls_range.offset != 0 ||
+ fl->generic_hdr.pls_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);
@@ -678,14 +686,49 @@ 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,
};
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 8ff8c1b..3b13062 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -906,7 +906,7 @@ pnfs_find_lseg(struct pnfs_layout_hdr *lo,
* Layout segment is retreived from the server if not cached.
* The appropriate layout segment is referenced and returned to the caller.
*/
-static struct pnfs_layout_segment *
+struct pnfs_layout_segment *
pnfs_update_layout(struct inode *ino,
struct nfs_open_context *ctx,
loff_t pos,
@@ -975,7 +975,8 @@ pnfs_update_layout(struct inode *ino,
arg.offset -= pg_offset;
arg.length += pg_offset;
}
- arg.length = PAGE_CACHE_ALIGN(arg.length);
+ if (arg.length != NFS4_MAX_UINT64)
+ arg.length = PAGE_CACHE_ALIGN(arg.length);
lseg = send_layoutget(lo, ctx, &arg, gfp_flags);
if (!lseg && first) {
@@ -993,6 +994,7 @@ out_unlock:
spin_unlock(&ino->i_lock);
goto out;
}
+EXPORT_SYMBOL_GPL(pnfs_update_layout);
int
pnfs_layout_process(struct nfs4_layoutget *lgp)
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index f2b183b..8f0b733 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -185,6 +185,12 @@ int pnfs_layoutcommit_inode(struct inode *inode, bool sync);
int _pnfs_return_layout(struct inode *);
int pnfs_ld_write_done(struct nfs_write_data *);
int pnfs_ld_read_done(struct nfs_read_data *);
+struct pnfs_layout_segment *pnfs_update_layout(struct inode *ino,
+ struct nfs_open_context *ctx,
+ loff_t pos,
+ u64 count,
+ enum pnfs_iomode iomode,
+ gfp_t gfp_flags);
/* pnfs_dev.c */
struct nfs4_deviceid_node {
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 9b2a1d7..c394662 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -120,6 +120,7 @@ void nfs_pageio_init_read_mds(struct nfs_pageio_descriptor *pgio,
nfs_pageio_init(pgio, inode, &nfs_pageio_read_ops,
NFS_SERVER(inode)->rsize, 0);
}
+EXPORT_SYMBOL_GPL(nfs_pageio_init_read_mds);
static void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
struct inode *inode)
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 70f1ef0..75e7f0e 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1049,6 +1049,7 @@ void nfs_pageio_init_write_mds(struct nfs_pageio_descriptor *pgio,
nfs_pageio_init(pgio, inode, &nfs_pageio_write_ops,
NFS_SERVER(inode)->wsize, ioflags);
}
+EXPORT_SYMBOL_GPL(nfs_pageio_init_write_mds);
static void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
struct inode *inode, int ioflags)
--
1.7.3.1
--
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