fs/reiser4/page_cache.h

   1 /* Copyright 2001, 2002, 2003 by Hans Reiser, licensing governed by
   2  * reiser4/README */
   3 /* Memory pressure hooks. Fake inodes handling. See page_cache.c. */
   4
   5 #if !defined(__REISER4_PAGE_CACHE_H__)
   6 #define __REISER4_PAGE_CACHE_H__
   7
   8 #include "forward.h"
   9 #include "context.h"            /* for reiser4_ctx_gfp_mask_get() */
  10
  11 #include <linux/fs.h>           /* for struct super_block, address_space  */
  12 #include <linux/mm.h>           /* for struct page  */
  13 #include <linux/pagemap.h>      /* for lock_page()  */
  14 #include <linux/vmalloc.h>      /* for __vmalloc()  */
  15
  16 extern int reiser4_init_formatted_fake(struct super_block *);
  17 extern void reiser4_done_formatted_fake(struct super_block *);
  18
  19 extern reiser4_tree *reiser4_tree_by_page(const struct page *);
  20
  21 #define reiser4_submit_bio(rw, bio) submit_bio((rw), (bio))
  22
  23 extern void reiser4_wait_page_writeback(struct page *);
  24 static inline void lock_and_wait_page_writeback(struct page *page)
  25 {
  26         lock_page(page);
  27         if (unlikely(PageWriteback(page)))
  28                 reiser4_wait_page_writeback(page);
  29 }
  30
  31 #define jprivate(page) ((jnode *)page_private(page))
  32
  33 extern int reiser4_page_io(struct page *, jnode *, int rw, gfp_t);
  34 extern void reiser4_drop_page(struct page *);
  35 extern void reiser4_invalidate_pages(struct address_space *, pgoff_t from,
  36                                      unsigned long count, int even_cows);
  37 extern void capture_reiser4_inodes(struct super_block *,
  38                                    struct writeback_control *);
  39 static inline void *reiser4_vmalloc(unsigned long size)
  40 {
  41         return __vmalloc(size,
  42                          reiser4_ctx_gfp_mask_get() | __GFP_HIGHMEM,
  43                          PAGE_KERNEL);
  44 }
  45
  46 #define PAGECACHE_TAG_REISER4_MOVED PAGECACHE_TAG_DIRTY
  47
  48 #if REISER4_DEBUG
  49 extern void print_page(const char *prefix, struct page *page);
  50 #else
  51 #define print_page(prf, p) noop
  52 #endif
  53
  54 /* __REISER4_PAGE_CACHE_H__ */
  55 #endif
  56
  57 /* Make Linus happy.
  58    Local variables:
  59    c-indentation-style: "K&R"
  60    mode-name: "LC"
  61    c-basic-offset: 8
  62    tab-width: 8
  63    fill-column: 120
  64    scroll-step: 1
  65    End:
  66 */