NFS: Create a common rw_header_alloc and rw_header_free function
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>
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index ab4c1a5..4cf3577 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -31,33 +31,19 @@
static const struct nfs_pageio_ops nfs_pageio_read_ops;
static const struct rpc_call_ops nfs_read_common_ops;
static const struct nfs_pgio_completion_ops nfs_async_read_completion_ops;
+static const struct nfs_rw_ops nfs_rw_read_ops;
static struct kmem_cache *nfs_rdata_cachep;
-struct nfs_rw_header *nfs_readhdr_alloc(void)
+static struct nfs_rw_header *nfs_readhdr_alloc(void)
{
- struct nfs_rw_header *rhdr;
-
- rhdr = kmem_cache_zalloc(nfs_rdata_cachep, GFP_KERNEL);
- if (rhdr) {
- struct nfs_pgio_header *hdr = &rhdr->header;
-
- INIT_LIST_HEAD(&hdr->pages);
- INIT_LIST_HEAD(&hdr->rpc_list);
- spin_lock_init(&hdr->lock);
- atomic_set(&hdr->refcnt, 0);
- }
- return rhdr;
+ return kmem_cache_zalloc(nfs_rdata_cachep, GFP_KERNEL);
}
-EXPORT_SYMBOL_GPL(nfs_readhdr_alloc);
-void nfs_readhdr_free(struct nfs_pgio_header *hdr)
+static void nfs_readhdr_free(struct nfs_rw_header *rhdr)
{
- struct nfs_rw_header *rhdr = container_of(hdr, struct nfs_rw_header, header);
-
kmem_cache_free(nfs_rdata_cachep, rhdr);
}
-EXPORT_SYMBOL_GPL(nfs_readhdr_free);
static
int nfs_return_empty_page(struct page *page)
@@ -79,7 +65,8 @@
if (server->pnfs_curr_ld && !force_mds)
pg_ops = server->pnfs_curr_ld->pg_read_ops;
#endif
- nfs_pageio_init(pgio, inode, pg_ops, compl_ops, server->rsize, 0);
+ nfs_pageio_init(pgio, inode, pg_ops, compl_ops, &nfs_rw_read_ops,
+ server->rsize, 0);
}
EXPORT_SYMBOL_GPL(nfs_pageio_init_read);
@@ -375,13 +362,13 @@
struct nfs_pgio_header *hdr;
int ret;
- rhdr = nfs_readhdr_alloc();
+ rhdr = nfs_rw_header_alloc(desc->pg_rw_ops);
if (!rhdr) {
desc->pg_completion_ops->error_cleanup(&desc->pg_list);
return -ENOMEM;
}
hdr = &rhdr->header;
- nfs_pgheader_init(desc, hdr, nfs_readhdr_free);
+ nfs_pgheader_init(desc, hdr, nfs_rw_header_free);
atomic_inc(&hdr->refcnt);
ret = nfs_generic_pagein(desc, hdr);
if (ret == 0)
@@ -647,3 +634,8 @@
{
kmem_cache_destroy(nfs_rdata_cachep);
}
+
+static const struct nfs_rw_ops nfs_rw_read_ops = {
+ .rw_alloc_header = nfs_readhdr_alloc,
+ .rw_free_header = nfs_readhdr_free,
+};