2 #include <linux/module.h>
4 #include <linux/pagemap.h>
5 #include <linux/highmem.h>
6 #include <linux/ceph/pagelist.h>
8 static void ceph_pagelist_unmap_tail(struct ceph_pagelist *pl)
10 struct page *page = list_entry(pl->head.prev, struct page,
15 int ceph_pagelist_release(struct ceph_pagelist *pl)
18 ceph_pagelist_unmap_tail(pl);
20 while (!list_empty(&pl->head)) {
21 struct page *page = list_first_entry(&pl->head, struct page,
28 EXPORT_SYMBOL(ceph_pagelist_release);
30 static int ceph_pagelist_addpage(struct ceph_pagelist *pl)
32 struct page *page = __page_cache_alloc(GFP_NOFS);
35 pl->room += PAGE_SIZE;
36 list_add_tail(&page->lru, &pl->head);
38 ceph_pagelist_unmap_tail(pl);
39 pl->mapped_tail = kmap(page);
43 int ceph_pagelist_append(struct ceph_pagelist *pl, const void *buf, size_t len)
45 while (pl->room < len) {
46 size_t bit = pl->room;
49 memcpy(pl->mapped_tail + (pl->length & ~PAGE_CACHE_MASK),
55 ret = ceph_pagelist_addpage(pl);
60 memcpy(pl->mapped_tail + (pl->length & ~PAGE_CACHE_MASK), buf, len);
65 EXPORT_SYMBOL(ceph_pagelist_append);