Use common code for pnfs_pageio_init_{read,write} and use
a common generic pg_test function.
Note that this function always assumes the the layout driver's
pg_test method is implemented.
Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
---
fs/nfs/pagelist.c | 1 +
fs/nfs/pnfs.c | 57 ++++++++++++++--------------------------------------
fs/nfs/pnfs.h | 19 +++++++----------
fs/nfs/read.c | 2 +-
fs/nfs/write.c | 3 +-
5 files changed, 27 insertions(+), 55 deletions(-)
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index c80add6..0918ea8 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -229,6 +229,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
desc->pg_ioflags = io_flags;
desc->pg_error = 0;
desc->pg_lseg = NULL;
+ desc->pg_test = NULL;
}
/**
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 00b1282..f7a9405 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1043,46 +1043,30 @@ out_forget_reply:
goto out;
}
-static int pnfs_read_pg_test(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *prev,
- struct nfs_page *req)
-{
- if (pgio->pg_count == prev->wb_bytes) {
- /* This is first coelesce call for a series of nfs_pages */
- pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
- prev->wb_context,
- req_offset(req),
- pgio->pg_count,
- IOMODE_READ,
- GFP_KERNEL);
- } else if (pgio->pg_lseg &&
- req_offset(req) > end_offset(pgio->pg_lseg->pls_range.offset,
- pgio->pg_lseg->pls_range.length))
- return 0;
- return NFS_SERVER(pgio->pg_inode)->pnfs_curr_ld->pg_test(pgio, prev, req);
-}
-
-void
-pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *inode)
+int
+pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
+ struct nfs_page *req)
{
- struct pnfs_layoutdriver_type *ld;
+ enum pnfs_iomode access_type;
+ gfp_t gfp_flags;
- ld = NFS_SERVER(inode)->pnfs_curr_ld;
- pgio->pg_test = (ld && ld->pg_test) ? pnfs_read_pg_test : NULL;
-}
-
-static int pnfs_write_pg_test(struct nfs_pageio_descriptor *pgio,
- struct nfs_page *prev,
- struct nfs_page *req)
-{
+ /* We assume that pg_ioflags == 0 iff we're reading a page */
+ if (pgio->pg_ioflags == 0) {
+ access_type = IOMODE_READ;
+ gfp_flags = GFP_KERNEL;
+ } else {
+ access_type = IOMODE_RW;
+ gfp_flags = GFP_NOFS;
+ }
+
if (pgio->pg_count == prev->wb_bytes) {
/* This is first coelesce call for a series of nfs_pages */
pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
prev->wb_context,
req_offset(req),
pgio->pg_count,
- IOMODE_RW,
- GFP_NOFS);
+ access_type,
+ gfp_flags);
} else if (pgio->pg_lseg &&
req_offset(req) > end_offset(pgio->pg_lseg->pls_range.offset,
pgio->pg_lseg->pls_range.length))
@@ -1090,15 +1074,6 @@ static int pnfs_write_pg_test(struct nfs_pageio_descriptor *pgio,
return NFS_SERVER(pgio->pg_inode)->pnfs_curr_ld->pg_test(pgio, prev, req);
}
-void
-pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *inode)
-{
- struct pnfs_layoutdriver_type *ld;
-
- ld = NFS_SERVER(inode)->pnfs_curr_ld;
- pgio->pg_test = (ld && ld->pg_test) ? pnfs_write_pg_test : NULL;
-}
-
/*
* Called by non rpc-based layout drivers
*/
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 25da946..cc61ae0 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -158,8 +158,7 @@ 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 *);
-void pnfs_pageio_init_write(struct nfs_pageio_descriptor *, struct inode *);
+int pnfs_generic_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev, struct nfs_page *req);
int pnfs_layout_process(struct nfs4_layoutget *lgp);
void pnfs_free_lseg_list(struct list_head *tmp_list);
void pnfs_destroy_layout(struct nfs_inode *);
@@ -293,6 +292,12 @@ static inline int pnfs_return_layout(struct inode *ino)
return 0;
}
+static inline void pnfs_pageio_init(struct nfs_pageio_descriptor *pgio, struct inode *inode)
+{
+ if (NFS_SERVER(inode)->pnfs_curr_ld)
+ pgio->pg_test = pnfs_generic_pg_test;
+}
+
#else /* CONFIG_NFS_V4_1 */
static inline void pnfs_destroy_all_layouts(struct nfs_client *clp)
@@ -376,16 +381,8 @@ static inline void unset_pnfs_layoutdriver(struct nfs_server *s)
{
}
-static inline void
-pnfs_pageio_init_read(struct nfs_pageio_descriptor *pgio, struct inode *ino)
-{
- pgio->pg_test = NULL;
-}
-
-static inline void
-pnfs_pageio_init_write(struct nfs_pageio_descriptor *pgio, struct inode *ino)
+static inline void pnfs_pageio_init(struct nfs_pageio_descriptor *, struct inode *)
{
- pgio->pg_test = NULL;
}
static inline void
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 540c8bc..6bd09a8 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -664,7 +664,7 @@ int nfs_readpages(struct file *filp, struct address_space *mapping,
if (ret == 0)
goto read_complete; /* all pages were read */
- pnfs_pageio_init_read(&pgio, inode);
+ pnfs_pageio_init(&pgio, inode);
if (rsize < PAGE_CACHE_SIZE)
nfs_pageio_init(&pgio, inode, nfs_pagein_multi, rsize, 0);
else
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index 7edb72f..d81c5c0 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1036,8 +1036,7 @@ static void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
{
size_t wsize = NFS_SERVER(inode)->wsize;
- pnfs_pageio_init_write(pgio, inode);
-
+ pnfs_pageio_init(pgio, inode);
if (wsize < PAGE_CACHE_SIZE)
nfs_pageio_init(pgio, inode, nfs_flush_multi, wsize, ioflags);
else
--
1.7.3.4
--
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