5 files changed, 45 insertions, 5 deletions

diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 92ea8265d7d5..3e7a84a1e509 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -661,5 +661,8 @@ const struct file_operations ext2_dir_operations = {
         .read           = generic_read_dir,
         .readdir        = ext2_readdir,
         .ioctl          = ext2_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl   = ext2_compat_ioctl,
+#endif
         .fsync          = ext2_sync_file,
 };
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index e65a019fc7a5..c19ac153f56b 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -137,6 +137,7 @@ extern void ext2_set_inode_flags(struct inode *inode);
 /* ioctl.c */
 extern int ext2_ioctl (struct inode *, struct file *, unsigned int,
                        unsigned long);
+extern long ext2_compat_ioctl(struct file *, unsigned int, unsigned long);
 
 /* namei.c */
 struct dentry *ext2_get_parent(struct dentry *child);
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 23e2c7ccec1d..2dba473c524a 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -41,17 +41,18 @@ static int ext2_release_file (struct inode * inode, struct file * filp)
  */
 const struct file_operations ext2_file_operations = {
         .llseek         = generic_file_llseek,
-        .read           = generic_file_read,
-        .write          = generic_file_write,
+        .read           = do_sync_read,
+        .write          = do_sync_write,
         .aio_read       = generic_file_aio_read,
         .aio_write      = generic_file_aio_write,
         .ioctl          = ext2_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl   = ext2_compat_ioctl,
+#endif
         .mmap           = generic_file_mmap,
         .open           = generic_file_open,
         .release        = ext2_release_file,
         .fsync          = ext2_sync_file,
-        .readv          = generic_file_readv,
-        .writev         = generic_file_writev,
         .sendfile       = generic_file_sendfile,
         .splice_read    = generic_file_splice_read,
         .splice_write   = generic_file_splice_write,
@@ -63,6 +64,9 @@ const struct file_operations ext2_xip_file_operations = {
         .read           = xip_file_read,
         .write          = xip_file_write,
         .ioctl          = ext2_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl   = ext2_compat_ioctl,
+#endif
         .mmap           = xip_file_mmap,
         .open           = generic_file_open,
         .release        = ext2_release_file,
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index 3ca9afdf713d..1dfba77eab10 100644
--- a/fs/ext2/ioctl.c
+++ b/fs/ext2/ioctl.c
@@ -11,6 +11,8 @@
 #include <linux/capability.h>
 #include <linux/time.h>
 #include <linux/sched.h>
+#include <linux/compat.h>
+#include <linux/smp_lock.h>
 #include <asm/current.h>
 #include <asm/uaccess.h>
 
@@ -80,3 +82,33 @@ int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
                 return -ENOTTY;
         }
 }
+
+#ifdef CONFIG_COMPAT
+long ext2_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+        struct inode *inode = file->f_dentry->d_inode;
+        int ret;
+
+        /* These are just misnamed, they actually get/put from/to user an int */
+        switch (cmd) {
+        case EXT2_IOC32_GETFLAGS:
+                cmd = EXT2_IOC_GETFLAGS;
+                break;
+        case EXT2_IOC32_SETFLAGS:
+                cmd = EXT2_IOC_SETFLAGS;
+                break;
+        case EXT2_IOC32_GETVERSION:
+                cmd = EXT2_IOC_GETVERSION;
+                break;
+        case EXT2_IOC32_SETVERSION:
+                cmd = EXT2_IOC_SETVERSION;
+                break;
+        default:
+                return -ENOIOCTLCMD;
+        }
+        lock_kernel();
+        ret = ext2_ioctl(inode, file, cmd, (unsigned long) compat_ptr(arg));
+        unlock_kernel();
+        return ret;
+}
+#endif
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 4ca824985321..e1af5b4cf80c 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -326,7 +326,7 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
                 ext2_set_link(new_dir, new_de, new_page, old_inode);
                 new_inode->i_ctime = CURRENT_TIME_SEC;
                 if (dir_de)
-                        new_inode->i_nlink--;
+                        drop_nlink(new_inode);
                 inode_dec_link_count(new_inode);
         } else {
                 if (dir_de) {