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NFS: Create a common rw_header_alloc and rw_header_free function

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I create a new struct nfs_rw_ops to decide the differences between reads
and writes.  This struct will be set when initializing a new
nfs_pgio_descriptor, and then passed on to the nfs_rw_header when a new
header is allocated.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Anna Schumaker
2014-05-06 09:12:30 -04:00
committed by Trond Myklebust
parent 00bfa30abe
commit 4a0de55c56
7 changed files with 72 additions and 45 deletions
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7
include/linux/nfs_page.h
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@@ -52,6 +52,11 @@ struct nfs_pageio_ops {
int (*pg_doio)(struct nfs_pageio_descriptor *);
};
struct nfs_rw_ops {
struct nfs_rw_header *(*rw_alloc_header)(void);
void (*rw_free_header)(struct nfs_rw_header *);
};
struct nfs_pageio_descriptor {
struct list_head pg_list;
unsigned long pg_bytes_written;
@@ -63,6 +68,7 @@ struct nfs_pageio_descriptor {
struct inode *pg_inode;
const struct nfs_pageio_ops *pg_ops;
const struct nfs_rw_ops *pg_rw_ops;
int pg_ioflags;
int pg_error;
const struct rpc_call_ops *pg_rpc_callops;
@@ -86,6 +92,7 @@ extern void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
struct inode *inode,
const struct nfs_pageio_ops *pg_ops,
const struct nfs_pgio_completion_ops *compl_ops,
const struct nfs_rw_ops *rw_ops,
size_t bsize,
int how);
extern int nfs_pageio_add_request(struct nfs_pageio_descriptor *,