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authorFred Isaman <iisaman@netapp.com>2012-04-20 14:47:44 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-04-27 14:10:37 -0400
commitcd841605f7a721878d8a2d1362484723d8abf569 (patch)
treeb5c37db575cd545a183577249909e042fe38d646 /include/linux/nfs_fs.h
parentb5542849764aa56fd3f05c0041195b637b9d2ac2 (diff)
downloadop-kernel-dev-cd841605f7a721878d8a2d1362484723d8abf569.zip
op-kernel-dev-cd841605f7a721878d8a2d1362484723d8abf569.tar.gz
NFS: create common nfs_pgio_header for both read and write
In order to avoid duplicating all the data in nfs_read_data whenever we split it up into multiple RPC calls (either due to a short read result or due to rsize < PAGE_SIZE), we split out the bits that are the same per RPC call into a separate "header" structure. The goal this patch moves towards is to have a single header refcounted by several rpc_data structures. Thus, want to always refer from rpc_data to the header, and not the other way. This patch comes close to that ideal, but the directio code currently needs some special casing, isolated in the nfs_direct_[read_write]hdr_release() functions. This will be dealt with in a future patch. Signed-off-by: Fred Isaman <iisaman@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'include/linux/nfs_fs.h')
-rw-r--r--include/linux/nfs_fs.h12
1 files changed, 0 insertions, 12 deletions
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index d5d68f3..8d3a2b8 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -569,12 +569,6 @@ nfs_have_writebacks(struct inode *inode)
}
/*
- * Allocate nfs_write_data structures
- */
-extern struct nfs_write_data *nfs_writedata_alloc(unsigned int npages);
-extern void nfs_writedata_free(struct nfs_write_data *);
-
-/*
* linux/fs/nfs/read.c
*/
extern int nfs_readpage(struct file *, struct page *);
@@ -585,12 +579,6 @@ extern int nfs_readpage_async(struct nfs_open_context *, struct inode *,
struct page *);
/*
- * Allocate nfs_read_data structures
- */
-extern struct nfs_read_data *nfs_readdata_alloc(unsigned int npages);
-extern void nfs_readdata_free(struct nfs_read_data *);
-
-/*
* linux/fs/nfs3proc.c
*/
#ifdef CONFIG_NFS_V3_ACL
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