Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

[karo-tx-linux.git] / include / linux / writeback.h

diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 56f92fcbe94aa9a82508b5db1a878c43cd348699..4ef4d22e5e43bb1439183aee44782fb5d46a41a3 100644 (file)
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -1,9 +1,11 @@
 /*
- * include/linux/writeback.h.
+ * include/linux/writeback.h
  */
 #ifndef WRITEBACK_H
 #define WRITEBACK_H
 
+#include <linux/sched.h>
+
 struct backing_dev_info;
 
 extern spinlock_t inode_lock;
@@ -50,14 +52,17 @@ struct writeback_control {
         * a hint that the filesystem need only write out the pages inside that
         * byterange.  The byte at `end' is included in the writeout request.
         */
-       loff_t start;
-       loff_t end;
+       loff_t range_start;
+       loff_t range_end;
 
        unsigned nonblocking:1;         /* Don't get stuck on request queues */
        unsigned encountered_congestion:1; /* An output: a queue is full */
        unsigned for_kupdate:1;         /* A kupdate writeback */
        unsigned for_reclaim:1;         /* Invoked from the page allocator */
        unsigned for_writepages:1;      /* This is a writepages() call */
+       unsigned range_cyclic:1;        /* range_start is cyclic */
+
+       void *fs_private;               /* For use by ->writepages() */
 };
 
 /*
@@ -83,7 +88,7 @@ static inline void wait_on_inode(struct inode *inode)
 int wakeup_pdflush(long nr_pages);
 void laptop_io_completion(void);
 void laptop_sync_completion(void);
-void throttle_vm_writeout(void);
+void throttle_vm_writeout(gfp_t gfp_mask);
 
 /* These are exported to sysctl. */
 extern int dirty_background_ratio;
@@ -108,12 +113,22 @@ balance_dirty_pages_ratelimited(struct address_space *mapping)
        balance_dirty_pages_ratelimited_nr(mapping, 1);
 }
 
+typedef int (*writepage_t)(struct page *page, struct writeback_control *wbc,
+                               void *data);
+
 int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0);
+int generic_writepages(struct address_space *mapping,
+                      struct writeback_control *wbc);
+int write_cache_pages(struct address_space *mapping,
+                     struct writeback_control *wbc, writepage_t writepage,
+                     void *data);
 int do_writepages(struct address_space *mapping, struct writeback_control *wbc);
 int sync_page_range(struct inode *inode, struct address_space *mapping,
                        loff_t pos, loff_t count);
 int sync_page_range_nolock(struct inode *inode, struct address_space *mapping,
                           loff_t pos, loff_t count);
+void set_page_dirty_balance(struct page *page);
+void writeback_set_ratelimit(void);
 
 /* pdflush.c */
 extern int nr_pdflush_threads; /* Global so it can be exported to sysctl