Lines Matching refs:actor
24 static void *cache_first_page(struct squashfs_page_actor *actor)
26 actor->next_page = 1;
27 return actor->buffer[0];
30 static void *cache_next_page(struct squashfs_page_actor *actor)
32 if (actor->next_page == actor->pages)
35 return actor->buffer[actor->next_page++];
38 static void cache_finish_page(struct squashfs_page_actor *actor)
46 struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);
48 if (actor == NULL)
51 actor->length = length ? : pages * PAGE_SIZE;
52 actor->buffer = buffer;
53 actor->pages = pages;
54 actor->next_page = 0;
55 actor->tmp_buffer = NULL;
56 actor->squashfs_first_page = cache_first_page;
57 actor->squashfs_next_page = cache_next_page;
58 actor->squashfs_finish_page = cache_finish_page;
59 return actor;
63 static void *handle_next_page(struct squashfs_page_actor *actor)
65 int max_pages = (actor->length + PAGE_SIZE - 1) >> PAGE_SHIFT;
67 if (actor->returned_pages == max_pages)
70 if ((actor->next_page == actor->pages) ||
71 (actor->next_index != actor->page[actor->next_page]->index)) {
72 actor->next_index++;
73 actor->returned_pages++;
74 actor->last_page = NULL;
75 return actor->alloc_buffer ? actor->tmp_buffer : ERR_PTR(-ENOMEM);
78 actor->next_index++;
79 actor->returned_pages++;
80 actor->last_page = actor->page[actor->next_page];
81 return actor->pageaddr = kmap_local_page(actor->page[actor->next_page++]);
84 static void *direct_first_page(struct squashfs_page_actor *actor)
86 return handle_next_page(actor);
89 static void *direct_next_page(struct squashfs_page_actor *actor)
91 if (actor->pageaddr) {
92 kunmap_local(actor->pageaddr);
93 actor->pageaddr = NULL;
96 return handle_next_page(actor);
99 static void direct_finish_page(struct squashfs_page_actor *actor)
101 if (actor->pageaddr)
102 kunmap_local(actor->pageaddr);
108 struct squashfs_page_actor *actor = kmalloc(sizeof(*actor), GFP_KERNEL);
110 if (actor == NULL)
114 actor->tmp_buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
116 if (actor->tmp_buffer == NULL) {
117 kfree(actor);
121 actor->tmp_buffer = NULL;
123 actor->length = length ? : pages * PAGE_SIZE;
124 actor->page = page;
125 actor->pages = pages;
126 actor->next_page = 0;
127 actor->returned_pages = 0;
128 actor->next_index = page[0]->index & ~((1 << (msblk->block_log - PAGE_SHIFT)) - 1);
129 actor->pageaddr = NULL;
130 actor->last_page = NULL;
131 actor->alloc_buffer = msblk->decompressor->alloc_buffer;
132 actor->squashfs_first_page = direct_first_page;
133 actor->squashfs_next_page = direct_next_page;
134 actor->squashfs_finish_page = direct_finish_page;
135 return actor;