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Diffstat (limited to 'fs/nfs/read.c')
-rw-r--r--fs/nfs/read.c49
1 files changed, 29 insertions, 20 deletions
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index 52bf634260a..7a9ee00e0c6 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -43,13 +43,15 @@ static mempool_t *nfs_rdata_mempool;
#define MIN_POOL_READ (32)
-struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
+struct nfs_read_data *nfs_readdata_alloc(size_t len)
{
+ unsigned int pagecount = (len + PAGE_SIZE - 1) >> PAGE_SHIFT;
struct nfs_read_data *p = mempool_alloc(nfs_rdata_mempool, SLAB_NOFS);
if (p) {
memset(p, 0, sizeof(*p));
INIT_LIST_HEAD(&p->pages);
+ p->npages = pagecount;
if (pagecount <= ARRAY_SIZE(p->page_array))
p->pagevec = p->page_array;
else {
@@ -63,7 +65,7 @@ struct nfs_read_data *nfs_readdata_alloc(unsigned int pagecount)
return p;
}
-void nfs_readdata_free(struct nfs_read_data *p)
+static void nfs_readdata_free(struct nfs_read_data *p)
{
if (p && (p->pagevec != &p->page_array[0]))
kfree(p->pagevec);
@@ -116,10 +118,17 @@ static void nfs_readpage_truncate_uninitialised_page(struct nfs_read_data *data)
pages = &data->args.pages[base >> PAGE_CACHE_SHIFT];
base &= ~PAGE_CACHE_MASK;
pglen = PAGE_CACHE_SIZE - base;
- if (pglen < remainder)
+ for (;;) {
+ if (remainder <= pglen) {
+ memclear_highpage_flush(*pages, base, remainder);
+ break;
+ }
memclear_highpage_flush(*pages, base, pglen);
- else
- memclear_highpage_flush(*pages, base, remainder);
+ pages++;
+ remainder -= pglen;
+ pglen = PAGE_CACHE_SIZE;
+ base = 0;
+ }
}
/*
@@ -133,7 +142,7 @@ static int nfs_readpage_sync(struct nfs_open_context *ctx, struct inode *inode,
int result;
struct nfs_read_data *rdata;
- rdata = nfs_readdata_alloc(1);
+ rdata = nfs_readdata_alloc(count);
if (!rdata)
return -ENOMEM;
@@ -329,25 +338,25 @@ static int nfs_pagein_multi(struct list_head *head, struct inode *inode)
struct nfs_page *req = nfs_list_entry(head->next);
struct page *page = req->wb_page;
struct nfs_read_data *data;
- unsigned int rsize = NFS_SERVER(inode)->rsize;
- unsigned int nbytes, offset;
+ size_t rsize = NFS_SERVER(inode)->rsize, nbytes;
+ unsigned int offset;
int requests = 0;
LIST_HEAD(list);
nfs_list_remove_request(req);
nbytes = req->wb_bytes;
- for(;;) {
- data = nfs_readdata_alloc(1);
+ do {
+ size_t len = min(nbytes,rsize);
+
+ data = nfs_readdata_alloc(len);
if (!data)
goto out_bad;
INIT_LIST_HEAD(&data->pages);
list_add(&data->pages, &list);
requests++;
- if (nbytes <= rsize)
- break;
- nbytes -= rsize;
- }
+ nbytes -= len;
+ } while(nbytes != 0);
atomic_set(&req->wb_complete, requests);
ClearPageError(page);
@@ -395,7 +404,7 @@ static int nfs_pagein_one(struct list_head *head, struct inode *inode)
if (NFS_SERVER(inode)->rsize < PAGE_CACHE_SIZE)
return nfs_pagein_multi(head, inode);
- data = nfs_readdata_alloc(NFS_SERVER(inode)->rpages);
+ data = nfs_readdata_alloc(NFS_SERVER(inode)->rsize);
if (!data)
goto out_bad;
@@ -476,6 +485,8 @@ static void nfs_readpage_set_pages_uptodate(struct nfs_read_data *data)
unsigned int base = data->args.pgbase;
struct page **pages;
+ if (data->res.eof)
+ count = data->args.count;
if (unlikely(count == 0))
return;
pages = &data->args.pages[base >> PAGE_CACHE_SHIFT];
@@ -483,11 +494,7 @@ static void nfs_readpage_set_pages_uptodate(struct nfs_read_data *data)
count += base;
for (;count >= PAGE_CACHE_SIZE; count -= PAGE_CACHE_SIZE, pages++)
SetPageUptodate(*pages);
- /*
- * Was this an eof or a short read? If the latter, don't mark the page
- * as uptodate yet.
- */
- if (count > 0 && (data->res.eof || data->args.count == data->res.count))
+ if (count != 0)
SetPageUptodate(*pages);
}
@@ -502,6 +509,8 @@ static void nfs_readpage_set_pages_error(struct nfs_read_data *data)
count += base;
for (;count >= PAGE_CACHE_SIZE; count -= PAGE_CACHE_SIZE, pages++)
SetPageError(*pages);
+ if (count != 0)
+ SetPageError(*pages);
}
/*