ufs: convert to new aops

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 58 insertions, 23 deletions

diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
index 154452172f43..2410ec6002db 100644
--- a/fs/ufs/dir.c
+++ b/fs/ufs/dir.c
@@ -19,6 +19,7 @@
 #include <linux/time.h>
 #include <linux/fs.h>
 #include <linux/ufs_fs.h>
+#include <linux/swap.h>
 
 #include "swab.h"
 #include "util.h"
@@ -38,12 +39,18 @@ static inline int ufs_match(struct super_block *sb, int len,
         return !memcmp(name, de->d_name, len);
 }
 
-static int ufs_commit_chunk(struct page *page, unsigned from, unsigned to)
+static int ufs_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
@@ -81,16 +88,20 @@ ino_t ufs_inode_by_name(struct inode *dir, struct dentry *dentry)
 void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
                   struct page *page, struct inode *inode)
 {
-        unsigned from = (char *) de - (char *) page_address(page);
-        unsigned to = from + fs16_to_cpu(dir->i_sb, de->d_reclen);
+        loff_t pos = page_offset(page) +
+                        (char *) de - (char *) page_address(page);
+        unsigned len = fs16_to_cpu(dir->i_sb, de->d_reclen);
         int err;
 
         lock_page(page);
-        err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
+        err = __ufs_write_begin(NULL, page->mapping, pos, len,
+                                AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         BUG_ON(err);
+
         de->d_ino = cpu_to_fs32(dir->i_sb, inode->i_ino);
         ufs_set_de_type(dir->i_sb, de, inode->i_mode);
-        err = ufs_commit_chunk(page, from, to);
+
+        err = ufs_commit_chunk(page, pos, len);
         ufs_put_page(page);
         dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
         mark_inode_dirty(dir);
@@ -312,7 +323,7 @@ int ufs_add_link(struct dentry *dentry, struct inode *inode)
         unsigned long npages = ufs_dir_pages(dir);
         unsigned long n;
         char *kaddr;
-        unsigned from, to;
+        loff_t pos;
         int err;
 
         UFSD("ENTER, name %s, namelen %u\n", name, namelen);
@@ -367,9 +378,10 @@ int ufs_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 = __ufs_write_begin(NULL, page->mapping, pos, rec_len,
+                                AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         if (err)
                 goto out_unlock;
         if (de->d_ino) {
@@ -386,7 +398,7 @@ got_it:
         de->d_ino = cpu_to_fs32(sb, inode->i_ino);
         ufs_set_de_type(sb, de, inode->i_mode);
 
-        err = ufs_commit_chunk(page, from, to);
+        err = ufs_commit_chunk(page, pos, rec_len);
         dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
 
         mark_inode_dirty(dir);
@@ -509,6 +521,7 @@ int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir,
         char *kaddr = page_address(page);
         unsigned from = ((char*)dir - kaddr) & ~(UFS_SB(sb)->s_uspi->s_dirblksize - 1);
         unsigned to = ((char*)dir - kaddr) + fs16_to_cpu(sb, dir->d_reclen);
+        loff_t pos;
         struct ufs_dir_entry *pde = NULL;
         struct ufs_dir_entry *de = (struct ufs_dir_entry *) (kaddr + from);
         int err;
@@ -532,13 +545,16 @@ int ufs_delete_entry(struct inode *inode, struct ufs_dir_entry *dir,
         }
         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 = __ufs_write_begin(NULL, mapping, pos, to - from,
+                                AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         BUG_ON(err);
         if (pde)
-                pde->d_reclen = cpu_to_fs16(sb, to-from);
+                pde->d_reclen = cpu_to_fs16(sb, to - from);
         dir->d_ino = 0;
-        err = ufs_commit_chunk(page, from, to);
+        err = ufs_commit_chunk(page, pos, to - from);
         inode->i_ctime = inode->i_mtime = CURRENT_TIME_SEC;
         mark_inode_dirty(inode);
 out:
@@ -559,14 +575,15 @@ int ufs_make_empty(struct inode * inode, struct inode *dir)
 
         if (!page)
                 return -ENOMEM;
-        kmap(page);
-        err = mapping->a_ops->prepare_write(NULL, page, 0, chunk_size);
+
+        err = __ufs_write_begin(NULL, mapping, 0, chunk_size,
+                                AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         if (err) {
                 unlock_page(page);
                 goto fail;
         }
 
-
+        kmap(page);
         base = (char*)page_address(page);
         memset(base, 0, PAGE_CACHE_SIZE);
 
@@ -584,10 +601,10 @@ int ufs_make_empty(struct inode * inode, struct inode *dir)
         de->d_reclen = cpu_to_fs16(sb, chunk_size - UFS_DIR_REC_LEN(1));
         ufs_set_de_namlen(sb, de, 2);
         strcpy (de->d_name, "..");
+        kunmap(page);
 
         err = ufs_commit_chunk(page, 0, chunk_size);
 fail:
-        kunmap(page);
         page_cache_release(page);
         return err;
 }
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index f18b79122fa3..d84d4b0f4779 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -558,24 +558,39 @@ static int ufs_writepage(struct page *page, struct writeback_control *wbc)
 {
         return block_write_full_page(page,ufs_getfrag_block,wbc);
 }
+
 static int ufs_readpage(struct file *file, struct page *page)
 {
         return block_read_full_page(page,ufs_getfrag_block);
 }
-static int ufs_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
+
+int __ufs_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,ufs_getfrag_block);
+        return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+                                ufs_getfrag_block);
 }
+
+static int ufs_write_begin(struct file *file, struct address_space *mapping,
+                        loff_t pos, unsigned len, unsigned flags,
+                        struct page **pagep, void **fsdata)
+{
+        *pagep = NULL;
+        return __ufs_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
+}
+
 static sector_t ufs_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,ufs_getfrag_block);
 }
+
 const struct address_space_operations ufs_aops = {
         .readpage = ufs_readpage,
         .writepage = ufs_writepage,
         .sync_page = block_sync_page,
-        .prepare_write = ufs_prepare_write,
-        .commit_write = generic_commit_write,
+        .write_begin = ufs_write_begin,
+        .write_end = generic_write_end,
         .bmap = ufs_bmap
 };
 
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index 06d344839c42..79a340a1909e 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -231,6 +231,9 @@ ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 
 extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
 extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
+extern int __ufs_write_begin(struct file *file, struct address_space *mapping,
+                loff_t pos, unsigned len, unsigned flags,
+                struct page **pagep, void **fsdata);
 
 /*
  * These functions manipulate ufs buffers