mm: implement ->map_pages for page cache

[sfrench/cifs-2.6.git] / fs / ext4 / ext4.h

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index d3a534fdc5ff6c766131e5d843591149736cc4d8..f1c65dc7cc0ad268a9fccc7b6f1aeaf078d84a0a 100644 (file)
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -31,6 +31,7 @@
 #include <linux/percpu_counter.h>
 #include <linux/ratelimit.h>
 #include <crypto/hash.h>
+#include <linux/falloc.h>
 #ifdef __KERNEL__
 #include <linux/compat.h>
 #endif
@@ -567,6 +568,8 @@ enum {
 #define EXT4_GET_BLOCKS_NO_LOCK                        0x0100
        /* Do not put hole in extent cache */
 #define EXT4_GET_BLOCKS_NO_PUT_HOLE            0x0200
+       /* Convert written extents to unwritten */
+#define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN      0x0400
 
 /*
  * The bit position of these flags must not overlap with any of the
@@ -998,6 +1001,8 @@ struct ext4_inode_info {
 #define EXT4_MOUNT2_STD_GROUP_SIZE     0x00000002 /* We have standard group
                                                      size of blocksize * 8
                                                      blocks */
+#define EXT4_MOUNT2_HURD_COMPAT                0x00000004 /* Support HURD-castrated
+                                                     file systems */
 
 #define clear_opt(sb, opt)             EXT4_SB(sb)->s_mount_opt &= \
                                                ~EXT4_MOUNT_##opt
@@ -1326,6 +1331,7 @@ struct ext4_sb_info {
        struct list_head s_es_lru;
        unsigned long s_es_last_sorted;
        struct percpu_counter s_extent_cache_cnt;
+       struct mb_cache *s_mb_cache;
        spinlock_t s_es_lru_lock ____cacheline_aligned_in_smp;
 
        /* Ratelimit ext4 messages. */
@@ -2133,8 +2139,6 @@ extern int ext4_writepage_trans_blocks(struct inode *);
 extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
 extern int ext4_block_truncate_page(handle_t *handle,
                struct address_space *mapping, loff_t from);
-extern int ext4_block_zero_page_range(handle_t *handle,
-               struct address_space *mapping, loff_t from, loff_t length);
 extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
                             loff_t lstart, loff_t lend);
 extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
@@ -2757,6 +2761,7 @@ extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
 extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
                        __u64 start, __u64 len);
 extern int ext4_ext_precache(struct inode *inode);
+extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len);
 
 /* move_extent.c */
 extern void ext4_double_down_write_data_sem(struct inode *first,
@@ -2766,6 +2771,8 @@ extern void ext4_double_up_write_data_sem(struct inode *orig_inode,
 extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
                             __u64 start_orig, __u64 start_donor,
                             __u64 len, __u64 *moved_len);
+extern int mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
+                           struct ext4_extent **extent);
 
 /* page-io.c */
 extern int __init ext4_init_pageio(void);