ext2: convert to new aops

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 53 insertions, 29 deletions

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 2bf49d7ef841..05d9342bb64e 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -22,7 +22,9 @@
  */
 
 #include "ext2.h"
+#include <linux/buffer_head.h>
 #include <linux/pagemap.h>
+#include <linux/swap.h>
 
 typedef struct ext2_dir_entry_2 ext2_dirent;
 
@@ -61,16 +63,25 @@ ext2_last_byte(struct inode *inode, unsigned long page_nr)
         return last_byte;
 }
 
-static int ext2_commit_chunk(struct page *page, unsigned from, unsigned to)
+static int ext2_commit_chunk(struct page *page, loff_t pos, unsigned len)
 {
-        struct inode *dir = page->mapping->host;
+        struct address_space *mapping = page->mapping;
+        struct inode *dir = mapping->host;
         int err = 0;
+
         dir->i_version++;
-        page->mapping->a_ops->commit_write(NULL, page, from, to);
+        block_write_end(NULL, mapping, pos, len, len, page, NULL);
+
+        if (pos+len > dir->i_size) {
+                i_size_write(dir, pos+len);
+                mark_inode_dirty(dir);
+        }
+
         if (IS_DIRSYNC(dir))
                 err = write_one_page(page, 1);
         else
                 unlock_page(page);
+
         return err;
 }
 
@@ -412,16 +423,18 @@ ino_t ext2_inode_by_name(struct inode * dir, struct dentry *dentry)
 void ext2_set_link(struct inode *dir, struct ext2_dir_entry_2 *de,
                         struct page *page, struct inode *inode)
 {
-        unsigned from = (char *) de - (char *) page_address(page);
-        unsigned to = from + le16_to_cpu(de->rec_len);
+        loff_t pos = page_offset(page) +
+                        (char *) de - (char *) page_address(page);
+        unsigned len = le16_to_cpu(de->rec_len);
         int err;
 
         lock_page(page);
-        err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
+        err = __ext2_write_begin(NULL, page->mapping, pos, len,
+                                AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         BUG_ON(err);
         de->inode = cpu_to_le32(inode->i_ino);
-        ext2_set_de_type (de, inode);
-        err = ext2_commit_chunk(page, from, to);
+        ext2_set_de_type(de, inode);
+        err = ext2_commit_chunk(page, pos, len);
         ext2_put_page(page);
         dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
         EXT2_I(dir)->i_flags &= ~EXT2_BTREE_FL;
@@ -444,7 +457,7 @@ int ext2_add_link (struct dentry *dentry, struct inode *inode)
         unsigned long npages = dir_pages(dir);
         unsigned long n;
         char *kaddr;
-        unsigned from, to;
+        loff_t pos;
         int err;
 
         /*
@@ -497,9 +510,10 @@ int ext2_add_link (struct dentry *dentry, struct inode *inode)
         return -EINVAL;
 
 got_it:
-        from = (char*)de - (char*)page_address(page);
-        to = from + rec_len;
-        err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
+        pos = page_offset(page) +
+                (char*)de - (char*)page_address(page);
+        err = __ext2_write_begin(NULL, page->mapping, pos, rec_len, 0,
+                                                        &page, NULL);
         if (err)
                 goto out_unlock;
         if (de->inode) {
@@ -509,10 +523,10 @@ got_it:
                 de = de1;
         }
         de->name_len = namelen;
-        memcpy (de->name, name, namelen);
+        memcpy(de->name, name, namelen);
         de->inode = cpu_to_le32(inode->i_ino);
         ext2_set_de_type (de, inode);
-        err = ext2_commit_chunk(page, from, to);
+        err = ext2_commit_chunk(page, pos, rec_len);
         dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
         EXT2_I(dir)->i_flags &= ~EXT2_BTREE_FL;
         mark_inode_dirty(dir);
@@ -537,6 +551,7 @@ int ext2_delete_entry (struct ext2_dir_entry_2 * dir, struct page * page )
         char *kaddr = page_address(page);
         unsigned from = ((char*)dir - kaddr) & ~(ext2_chunk_size(inode)-1);
         unsigned to = ((char*)dir - kaddr) + le16_to_cpu(dir->rec_len);
+        loff_t pos;
         ext2_dirent * pde = NULL;
         ext2_dirent * de = (ext2_dirent *) (kaddr + from);
         int err;
@@ -553,13 +568,15 @@ int ext2_delete_entry (struct ext2_dir_entry_2 * dir, struct page * page )
         }
         if (pde)
                 from = (char*)pde - (char*)page_address(page);
+        pos = page_offset(page) + from;
         lock_page(page);
-        err = mapping->a_ops->prepare_write(NULL, page, from, to);
+        err = __ext2_write_begin(NULL, page->mapping, pos, to - from, 0,
+                                                        &page, NULL);
         BUG_ON(err);
         if (pde)
-                pde->rec_len = cpu_to_le16(to-from);
+                pde->rec_len = cpu_to_le16(to - from);
         dir->inode = 0;
-        err = ext2_commit_chunk(page, from, to);
+        err = ext2_commit_chunk(page, pos, to - from);
         inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
         EXT2_I(inode)->i_flags &= ~EXT2_BTREE_FL;
         mark_inode_dirty(inode);
@@ -582,7 +599,9 @@ int ext2_make_empty(struct inode *inode, struct inode *parent)
 
         if (!page)
                 return -ENOMEM;
-        err = mapping->a_ops->prepare_write(NULL, page, 0, chunk_size);
+
+        err = __ext2_write_begin(NULL, page->mapping, 0, chunk_size, 0,
+                                                        &page, NULL);
         if (err) {
                 unlock_page(page);
                 goto fail;
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index 9fd0ec5ba0d0..a08052d2c008 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -134,6 +134,9 @@ extern void ext2_truncate (struct inode *);
 extern int ext2_setattr (struct dentry *, struct iattr *);
 extern void ext2_set_inode_flags(struct inode *inode);
 extern void ext2_get_inode_flags(struct ext2_inode_info *);
+int __ext2_write_begin(struct file *file, struct address_space *mapping,
+                loff_t pos, unsigned len, unsigned flags,
+                struct page **pagep, void **fsdata);
 
 /* ioctl.c */
 extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 0079b2cd5314..63ab02aa4c52 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -642,18 +642,21 @@ ext2_readpages(struct file *file, struct address_space *mapping,
         return mpage_readpages(mapping, pages, nr_pages, ext2_get_block);
 }
 
-static int
-ext2_prepare_write(struct file *file, struct page *page,
-                        unsigned from, unsigned to)
+int __ext2_write_begin(struct file *file, struct address_space *mapping,
+                loff_t pos, unsigned len, unsigned flags,
+                struct page **pagep, void **fsdata)
 {
-        return block_prepare_write(page,from,to,ext2_get_block);
+        return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+                                                        ext2_get_block);
 }
 
 static int
-ext2_nobh_prepare_write(struct file *file, struct page *page,
-                        unsigned from, unsigned to)
+ext2_write_begin(struct file *file, struct address_space *mapping,
+                loff_t pos, unsigned len, unsigned flags,
+                struct page **pagep, void **fsdata)
 {
-        return nobh_prepare_write(page,from,to,ext2_get_block);
+        *pagep = NULL;
+        return __ext2_write_begin(file, mapping, pos, len, flags, pagep,fsdata);
 }
 
 static int ext2_nobh_writepage(struct page *page,
@@ -689,8 +692,8 @@ const struct address_space_operations ext2_aops = {
         .readpages              = ext2_readpages,
         .writepage              = ext2_writepage,
         .sync_page              = block_sync_page,
-        .prepare_write          = ext2_prepare_write,
-        .commit_write           = generic_commit_write,
+        .write_begin            = ext2_write_begin,
+        .write_end              = generic_write_end,
         .bmap                   = ext2_bmap,
         .direct_IO              = ext2_direct_IO,
         .writepages             = ext2_writepages,
@@ -707,8 +710,7 @@ const struct address_space_operations ext2_nobh_aops = {
         .readpages              = ext2_readpages,
         .writepage              = ext2_nobh_writepage,
         .sync_page              = block_sync_page,
-        .prepare_write          = ext2_nobh_prepare_write,
-        .commit_write           = nobh_commit_write,
+        /* XXX: todo */
         .bmap                   = ext2_bmap,
         .direct_IO              = ext2_direct_IO,
         .writepages             = ext2_writepages,