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NFSv4.1: rearrange ->doio args

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This will make it possible to clear the lseg pointer in the same
function as it is put, instead of in the caller nfs_pageio_doio().

Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Fred Isaman
2011-03-03 15:13:48 +00:00
committed by Trond Myklebust
parent a69aef1496
commit c76069bda0
4 changed files with 45 additions and 39 deletions
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42
fs/nfs/read.c
View File

@@ -31,8 +31,8 @@
#define NFSDBG_FACILITY NFSDBG_PAGECACHE
static int nfs_pagein_multi(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
static int nfs_pagein_one(struct inode *, struct list_head *, unsigned int, size_t, int, struct pnfs_layout_segment *);
static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc);
static int nfs_pagein_one(struct nfs_pageio_descriptor *desc);
static const struct rpc_call_ops nfs_read_partial_ops;
static const struct rpc_call_ops nfs_read_full_ops;
@@ -117,9 +117,9 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data)
int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
struct page *page)
{
LIST_HEAD(one_request);
struct nfs_page *new;
unsigned int len;
struct nfs_pageio_descriptor pgio;
len = nfs_page_length(page);
if (len == 0)
@@ -132,11 +132,14 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
if (len < PAGE_CACHE_SIZE)
zero_user_segment(page, len, PAGE_CACHE_SIZE);
nfs_list_add_request(new, &one_request);
nfs_pageio_init(&pgio, inode, NULL, 0, 0);
nfs_list_add_request(new, &pgio.pg_list);
pgio.pg_count = len;
if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE)
nfs_pagein_multi(inode, &one_request, 1, len, 0, NULL);
nfs_pagein_multi(&pgio);
else
nfs_pagein_one(inode, &one_request, 1, len, 0, NULL);
nfs_pagein_one(&pgio);
return 0;
}
@@ -258,20 +261,21 @@ nfs_async_read_error(struct list_head *head)
* won't see the new data until our attribute cache is updated. This is more
* or less conventional NFS client behavior.
*/
static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags, struct pnfs_layout_segment *lseg)
static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc)
{
struct nfs_page *req = nfs_list_entry(head->next);
struct nfs_page *req = nfs_list_entry(desc->pg_list.next);
struct page *page = req->wb_page;
struct nfs_read_data *data;
size_t rsize = NFS_SERVER(inode)->rsize, nbytes;
size_t rsize = NFS_SERVER(desc->pg_inode)->rsize, nbytes;
unsigned int offset;
int requests = 0;
int ret = 0;
struct pnfs_layout_segment *lseg;
LIST_HEAD(list);
nfs_list_remove_request(req);
nbytes = count;
nbytes = desc->pg_count;
do {
size_t len = min(nbytes,rsize);
@@ -284,11 +288,11 @@ static int nfs_pagein_multi(struct inode *inode, struct list_head *head, unsigne
} while(nbytes != 0);
atomic_set(&req->wb_complete, requests);
/* We know lseg==NULL */
lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_READ);
BUG_ON(desc->pg_lseg != NULL);
lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_READ);
ClearPageError(page);
offset = 0;
nbytes = count;
nbytes = desc->pg_count;
do {
int ret2;
@@ -321,14 +325,17 @@ out_bad:
return -ENOMEM;
}
static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned int npages, size_t count, int flags, struct pnfs_layout_segment *lseg)
static int nfs_pagein_one(struct nfs_pageio_descriptor *desc)
{
struct nfs_page *req;
struct page **pages;
struct nfs_read_data *data;
struct list_head *head = &desc->pg_list;
struct pnfs_layout_segment *lseg = desc->pg_lseg;
int ret = -ENOMEM;
data = nfs_readdata_alloc(npages);
data = nfs_readdata_alloc(nfs_page_array_len(desc->pg_base,
desc->pg_count));
if (!data) {
nfs_async_read_error(head);
goto out;
@@ -344,9 +351,10 @@ static int nfs_pagein_one(struct inode *inode, struct list_head *head, unsigned
}
req = nfs_list_entry(data->pages.next);
if ((!lseg) && list_is_singular(&data->pages))
lseg = pnfs_update_layout(inode, req->wb_context, IOMODE_READ);
lseg = pnfs_update_layout(desc->pg_inode, req->wb_context, IOMODE_READ);
ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, count, 0, lseg);
ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, desc->pg_count,
0, lseg);
out:
put_lseg(lseg);
return ret;