diff options
Diffstat (limited to 'fs/ceph/pagelist.c')
| -rw-r--r-- | fs/ceph/pagelist.c | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/fs/ceph/pagelist.c b/fs/ceph/pagelist.c deleted file mode 100644 index 46a368b6dce5..000000000000 --- a/fs/ceph/pagelist.c +++ /dev/null | |||
| @@ -1,63 +0,0 @@ | |||
| 1 | |||
| 2 | #include <linux/gfp.h> | ||
| 3 | #include <linux/pagemap.h> | ||
| 4 | #include <linux/highmem.h> | ||
| 5 | |||
| 6 | #include "pagelist.h" | ||
| 7 | |||
| 8 | static void ceph_pagelist_unmap_tail(struct ceph_pagelist *pl) | ||
| 9 | { | ||
| 10 | struct page *page = list_entry(pl->head.prev, struct page, | ||
| 11 | lru); | ||
| 12 | kunmap(page); | ||
| 13 | } | ||
| 14 | |||
| 15 | int ceph_pagelist_release(struct ceph_pagelist *pl) | ||
| 16 | { | ||
| 17 | if (pl->mapped_tail) | ||
| 18 | ceph_pagelist_unmap_tail(pl); | ||
| 19 | |||
| 20 | while (!list_empty(&pl->head)) { | ||
| 21 | struct page *page = list_first_entry(&pl->head, struct page, | ||
| 22 | lru); | ||
| 23 | list_del(&page->lru); | ||
| 24 | __free_page(page); | ||
| 25 | } | ||
| 26 | return 0; | ||
| 27 | } | ||
| 28 | |||
| 29 | static int ceph_pagelist_addpage(struct ceph_pagelist *pl) | ||
| 30 | { | ||
| 31 | struct page *page = __page_cache_alloc(GFP_NOFS); | ||
| 32 | if (!page) | ||
| 33 | return -ENOMEM; | ||
| 34 | pl->room += PAGE_SIZE; | ||
| 35 | list_add_tail(&page->lru, &pl->head); | ||
| 36 | if (pl->mapped_tail) | ||
| 37 | ceph_pagelist_unmap_tail(pl); | ||
| 38 | pl->mapped_tail = kmap(page); | ||
| 39 | return 0; | ||
| 40 | } | ||
| 41 | |||
| 42 | int ceph_pagelist_append(struct ceph_pagelist *pl, void *buf, size_t len) | ||
| 43 | { | ||
| 44 | while (pl->room < len) { | ||
| 45 | size_t bit = pl->room; | ||
| 46 | int ret; | ||
| 47 | |||
| 48 | memcpy(pl->mapped_tail + (pl->length & ~PAGE_CACHE_MASK), | ||
| 49 | buf, bit); | ||
| 50 | pl->length += bit; | ||
| 51 | pl->room -= bit; | ||
| 52 | buf += bit; | ||
| 53 | len -= bit; | ||
| 54 | ret = ceph_pagelist_addpage(pl); | ||
| 55 | if (ret) | ||
| 56 | return ret; | ||
| 57 | } | ||
| 58 | |||
| 59 | memcpy(pl->mapped_tail + (pl->length & ~PAGE_CACHE_MASK), buf, len); | ||
| 60 | pl->length += len; | ||
| 61 | pl->room -= len; | ||
| 62 | return 0; | ||
| 63 | } | ||
