void random_map_readfn(struct map *map)
{
if (map->size == page_size)
read_one_page(map);
else {
if (RAND_BOOL())
read_one_page(map);
else
read_faultfns[rnd() % ARRAY_SIZE(read_faultfns)].func(map);
}
}
static int orangefs_readpages(struct file *file,
struct address_space *mapping,
struct list_head *pages,
unsigned nr_pages)
{
int page_idx;
int ret;
gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
for (page_idx = 0; page_idx < nr_pages; page_idx++) {
struct page *page;
page = list_entry(pages->prev, struct page, lru);
list_del(&page->lru);
if (!add_to_page_cache(page,
mapping,
page->index,
readahead_gfp_mask(mapping))) {
ret = read_one_page(page);
gossip_debug(GOSSIP_INODE_DEBUG,
"failure adding page to cache, read_one_page returned: %d\n",
ret);
} else {
put_page(page);
}
}
BUG_ON(!list_empty(pages));
return 0;
}
static int pvfs2_readpages(
struct file *file,
struct address_space *mapping,
struct list_head *pages,
unsigned nr_pages)
{
int page_idx;
int ret;
gossip_debug(GOSSIP_INODE_DEBUG, "pvfs2_readpages called\n");
for (page_idx = 0; page_idx < nr_pages; page_idx++)
{
struct page *page;
page = list_entry(pages->prev, struct page, lru);
list_del(&page->lru);
if (!add_to_page_cache(page, mapping, page->index, GFP_KERNEL)) {
ret = read_one_page(page);
}
else {
page_cache_release(page);
}
}
BUG_ON(!list_empty(pages));
return 0;
}
static int orangefs_readpage(struct file *file, struct page *page)
{
return read_one_page(page);
}
static int pvfs2_readpage(
struct file *file,
struct page *page)
{
return read_one_page(page);
}
