Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[safe/jmp/linux-2.6] / include / linux / pipe_fs_i.h

diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h
index b8aae1f..ea4f7cd 100644 (file)
--- a/include/linux/pipe_fs_i.h
+++ b/include/linux/pipe_fs_i.h
@@ -5,7 +5,9 @@
 
 #define PIPE_BUFFERS (16)
 
-#define PIPE_BUF_FLAG_LRU      0x01
+#define PIPE_BUF_FLAG_LRU      0x01    /* page is on the LRU */
+#define PIPE_BUF_FLAG_ATOMIC   0x02    /* was atomically mapped */
+#define PIPE_BUF_FLAG_GIFT     0x04    /* page is a gift */
 
 struct pipe_buffer {
        struct page *page;
@@ -28,8 +30,8 @@ struct pipe_buffer {
  */
 struct pipe_buf_operations {
        int can_merge;
-       void * (*map)(struct pipe_inode_info *, struct pipe_buffer *);
-       void (*unmap)(struct pipe_inode_info *, struct pipe_buffer *);
+       void * (*map)(struct pipe_inode_info *, struct pipe_buffer *, int);
+       void (*unmap)(struct pipe_inode_info *, struct pipe_buffer *, void *);
        int (*pin)(struct pipe_inode_info *, struct pipe_buffer *);
        void (*release)(struct pipe_inode_info *, struct pipe_buffer *);
        int (*steal)(struct pipe_inode_info *, struct pipe_buffer *);
@@ -64,10 +66,11 @@ void free_pipe_info(struct inode * inode);
 void __free_pipe_info(struct pipe_inode_info *);
 
 /* Generic pipe buffer ops functions */
-void *generic_pipe_buf_map(struct pipe_inode_info *, struct pipe_buffer *);
-void generic_pipe_buf_unmap(struct pipe_inode_info *, struct pipe_buffer *);
+void *generic_pipe_buf_map(struct pipe_inode_info *, struct pipe_buffer *, int);
+void generic_pipe_buf_unmap(struct pipe_inode_info *, struct pipe_buffer *, void *);
 void generic_pipe_buf_get(struct pipe_inode_info *, struct pipe_buffer *);
 int generic_pipe_buf_pin(struct pipe_inode_info *, struct pipe_buffer *);
+int generic_pipe_buf_steal(struct pipe_inode_info *, struct pipe_buffer *);
 
 /*
  * splice is tied to pipes as a transport (at least for now), so we'll just
@@ -78,6 +81,7 @@ int generic_pipe_buf_pin(struct pipe_inode_info *, struct pipe_buffer *);
                                 /* we may still block on the fd we splice */
                                 /* from/to, of course */
 #define SPLICE_F_MORE  (0x04)  /* expect more data */
+#define SPLICE_F_GIFT  (0x08)  /* pages passed in are a gift */
 
 /*
  * Passed to the actors