minixfs: convert to new aops

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

3 files changed, 53 insertions, 22 deletions

diff --git a/fs/minix/dir.c b/fs/minix/dir.c
index e207cbe70951..f70433816a38 100644
--- a/fs/minix/dir.c
+++ b/fs/minix/dir.c
@@ -9,8 +9,10 @@
  */
 
 #include "minix.h"
+#include <linux/buffer_head.h>
 #include <linux/highmem.h>
 #include <linux/smp_lock.h>
+#include <linux/swap.h>
 
 typedef struct minix_dir_entry minix_dirent;
 typedef struct minix3_dir_entry minix3_dirent;
@@ -48,11 +50,17 @@ static inline unsigned long dir_pages(struct inode *inode)
         return (inode->i_size+PAGE_CACHE_SIZE-1)>>PAGE_CACHE_SHIFT;
 }
 
-static int dir_commit_chunk(struct page *page, unsigned from, unsigned to)
+static int dir_commit_chunk(struct page *page, loff_t pos, unsigned len)
 {
-        struct inode *dir = (struct inode *)page->mapping->host;
+        struct address_space *mapping = page->mapping;
+        struct inode *dir = mapping->host;
         int err = 0;
-        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
@@ -220,7 +228,7 @@ int minix_add_link(struct dentry *dentry, struct inode *inode)
         char *kaddr, *p;
         minix_dirent *de;
         minix3_dirent *de3;
-        unsigned from, to;
+        loff_t pos;
         int err;
         char *namx = NULL;
         __u32 inumber;
@@ -272,9 +280,9 @@ int minix_add_link(struct dentry *dentry, struct inode *inode)
         return -EINVAL;
 
 got_it:
-        from = p - (char*)page_address(page);
-        to = from + sbi->s_dirsize;
-        err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
+        pos = (page->index >> PAGE_CACHE_SHIFT) + p - (char*)page_address(page);
+        err = __minix_write_begin(NULL, page->mapping, pos, sbi->s_dirsize,
+                                        AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         if (err)
                 goto out_unlock;
         memcpy (namx, name, namelen);
@@ -285,7 +293,7 @@ got_it:
                 memset (namx + namelen, 0, sbi->s_dirsize - namelen - 2);
                 de->inode = inode->i_ino;
         }
-        err = dir_commit_chunk(page, from, to);
+        err = dir_commit_chunk(page, pos, sbi->s_dirsize);
         dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
         mark_inode_dirty(dir);
 out_put:
@@ -302,15 +310,16 @@ int minix_delete_entry(struct minix_dir_entry *de, struct page *page)
         struct address_space *mapping = page->mapping;
         struct inode *inode = (struct inode*)mapping->host;
         char *kaddr = page_address(page);
-        unsigned from = (char*)de - kaddr;
-        unsigned to = from + minix_sb(inode->i_sb)->s_dirsize;
+        loff_t pos = page_offset(page) + (char*)de - kaddr;
+        unsigned len = minix_sb(inode->i_sb)->s_dirsize;
         int err;
 
         lock_page(page);
-        err = mapping->a_ops->prepare_write(NULL, page, from, to);
+        err = __minix_write_begin(NULL, mapping, pos, len,
+                                        AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         if (err == 0) {
                 de->inode = 0;
-                err = dir_commit_chunk(page, from, to);
+                err = dir_commit_chunk(page, pos, len);
         } else {
                 unlock_page(page);
         }
@@ -330,7 +339,8 @@ int minix_make_empty(struct inode *inode, struct inode *dir)
 
         if (!page)
                 return -ENOMEM;
-        err = mapping->a_ops->prepare_write(NULL, page, 0, 2 * sbi->s_dirsize);
+        err = __minix_write_begin(NULL, mapping, 0, 2 * sbi->s_dirsize,
+                                        AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         if (err) {
                 unlock_page(page);
                 goto fail;
@@ -421,17 +431,20 @@ not_empty:
 void minix_set_link(struct minix_dir_entry *de, struct page *page,
         struct inode *inode)
 {
-        struct inode *dir = (struct inode*)page->mapping->host;
+        struct address_space *mapping = page->mapping;
+        struct inode *dir = mapping->host;
         struct minix_sb_info *sbi = minix_sb(dir->i_sb);
-        unsigned from = (char *)de-(char*)page_address(page);
-        unsigned to = from + sbi->s_dirsize;
+        loff_t pos = page_offset(page) +
+                        (char *)de-(char*)page_address(page);
         int err;
 
         lock_page(page);
-        err = page->mapping->a_ops->prepare_write(NULL, page, from, to);
+
+        err = __minix_write_begin(NULL, mapping, pos, sbi->s_dirsize,
+                                        AOP_FLAG_UNINTERRUPTIBLE, &page, NULL);
         if (err == 0) {
                 de->inode = inode->i_ino;
-                err = dir_commit_chunk(page, from, to);
+                err = dir_commit_chunk(page, pos, sbi->s_dirsize);
         } else {
                 unlock_page(page);
         }
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 43668d7d668f..f4f3343b1800 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -346,24 +346,39 @@ static int minix_writepage(struct page *page, struct writeback_control *wbc)
 {
         return block_write_full_page(page, minix_get_block, wbc);
 }
+
 static int minix_readpage(struct file *file, struct page *page)
 {
         return block_read_full_page(page,minix_get_block);
 }
-static int minix_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
+
+int __minix_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,minix_get_block);
+        return block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+                                minix_get_block);
 }
+
+static int minix_write_begin(struct file *file, struct address_space *mapping,
+                        loff_t pos, unsigned len, unsigned flags,
+                        struct page **pagep, void **fsdata)
+{
+        *pagep = NULL;
+        return __minix_write_begin(file, mapping, pos, len, flags, pagep, fsdata);
+}
+
 static sector_t minix_bmap(struct address_space *mapping, sector_t block)
 {
         return generic_block_bmap(mapping,block,minix_get_block);
 }
+
 static const struct address_space_operations minix_aops = {
         .readpage = minix_readpage,
         .writepage = minix_writepage,
         .sync_page = block_sync_page,
-        .prepare_write = minix_prepare_write,
-        .commit_write = generic_commit_write,
+        .write_begin = minix_write_begin,
+        .write_end = generic_write_end,
         .bmap = minix_bmap
 };
 
diff --git a/fs/minix/minix.h b/fs/minix/minix.h
index 73ef84f8fb0b..ac5d3a75cb0d 100644
--- a/fs/minix/minix.h
+++ b/fs/minix/minix.h
@@ -54,6 +54,9 @@ extern int minix_new_block(struct inode * inode);
 extern void minix_free_block(struct inode *inode, unsigned long block);
 extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
 extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int __minix_write_begin(struct file *file, struct address_space *mapping,
+                        loff_t pos, unsigned len, unsigned flags,
+                        struct page **pagep, void **fsdata);
 
 extern void V1_minix_truncate(struct inode *);
 extern void V2_minix_truncate(struct inode *);