X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fufs%2Futil.c;h=84357f1ff0ec8915b4839d45f01fc33566c99a70;hb=35438c4327df18dbf5e7f597b69299119f4a14de;hp=a2f13f45708b7d0fa6d688579f3551176465f3bd;hpb=61b9175808670d9abf52156803ae0ed1e3706ac4;p=linux-2.6

diff --git a/fs/ufs/util.c b/fs/ufs/util.c
index a2f13f4570..84357f1ff0 100644
--- a/fs/ufs/util.c
+++ b/fs/ufs/util.c
@@ -184,14 +184,13 @@ void _ubh_memcpyubh_(struct ufs_sb_private_info * uspi,
 dev_t
 ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi)
 {
-	__fs32 fs32;
+	__u32 fs32;
 	dev_t dev;
 
 	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
-		fs32 = ufsi->i_u1.i_data[1];
+		fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[1]);
 	else
-		fs32 = ufsi->i_u1.i_data[0];
-	fs32 = fs32_to_cpu(sb, fs32);
+		fs32 = fs32_to_cpu(sb, ufsi->i_u1.i_data[0]);
 	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
 	case UFS_ST_SUNx86:
 	case UFS_ST_SUN:
@@ -212,7 +211,7 @@ ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi)
 void
 ufs_set_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi, dev_t dev)
 {
-	__fs32 fs32;
+	__u32 fs32;
 
 	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
 	case UFS_ST_SUNx86:
@@ -227,9 +226,61 @@ ufs_set_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi, dev_t dev
 		fs32 = old_encode_dev(dev);
 		break;
 	}
-	fs32 = cpu_to_fs32(sb, fs32);
 	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
-		ufsi->i_u1.i_data[1] = fs32;
+		ufsi->i_u1.i_data[1] = cpu_to_fs32(sb, fs32);
 	else
-		ufsi->i_u1.i_data[0] = fs32;
+		ufsi->i_u1.i_data[0] = cpu_to_fs32(sb, fs32);
+}
+
+/**
+ * ufs_get_locked_page() - locate, pin and lock a pagecache page, if not exist
+ * read it from disk.
+ * @mapping: the address_space to search
+ * @index: the page index
+ *
+ * Locates the desired pagecache page, if not exist we'll read it,
+ * locks it, increments its reference
+ * count and returns its address.
+ *
+ */
+
+struct page *ufs_get_locked_page(struct address_space *mapping,
+				 pgoff_t index)
+{
+	struct page *page;
+
+	page = find_lock_page(mapping, index);
+	if (!page) {
+		page = read_mapping_page(mapping, index, NULL);
+
+		if (IS_ERR(page)) {
+			printk(KERN_ERR "ufs_change_blocknr: "
+			       "read_mapping_page error: ino %lu, index: %lu\n",
+			       mapping->host->i_ino, index);
+			goto out;
+		}
+
+		lock_page(page);
+
+		if (unlikely(page->mapping == NULL)) {
+			/* Truncate got there first */
+			unlock_page(page);
+			page_cache_release(page);
+			page = NULL;
+			goto out;
+		}
+
+		if (!PageUptodate(page) || PageError(page)) {
+			unlock_page(page);
+			page_cache_release(page);
+
+			printk(KERN_ERR "ufs_change_blocknr: "
+			       "can not read page: ino %lu, index: %lu\n",
+			       mapping->host->i_ino, index);
+
+			page = ERR_PTR(-EIO);
+		}
+	}
+out:
+	return page;
 }