[PATCH] [13/18] BKL-removal: Add compat_ioctl for cifs

[Andi Kleen <ak@suse.de>]

Similar to the compat handlers of other file systems. The ioctls
are compatible except that they have different numbers.

Cc: sfrench@samba.org

Signed-off-by: Andi Kleen <ak@suse.de>

---
 fs/cifs/cifsfs.c |   15 +++++++++++++++
 fs/cifs/cifsfs.h |    2 ++
 fs/cifs/ioctl.c  |   19 +++++++++++++++++++
 3 files changed, 36 insertions(+)

Index: linux/fs/cifs/cifsfs.c
===================================================================
--- linux.orig/fs/cifs/cifsfs.c
+++ linux/fs/cifs/cifsfs.c
@@ -626,6 +626,9 @@ const struct file_operations cifs_file_o
 	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
 	.unlocked_ioctl	= cifs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = cifs_compat_ioctl,
+#endif
 #endif /* CONFIG_CIFS_POSIX */
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
@@ -646,6 +649,9 @@ const struct file_operations cifs_file_d
 	.splice_read = generic_file_splice_read,
 #ifdef CONFIG_CIFS_POSIX
 	.unlocked_ioctl = cifs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = cifs_compat_ioctl,
+#endif
 #endif /* CONFIG_CIFS_POSIX */
 	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
@@ -666,6 +672,9 @@ const struct file_operations cifs_file_n
 	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_POSIX
 	.unlocked_ioctl	= cifs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = cifs_compat_ioctl,
+#endif
 #endif /* CONFIG_CIFS_POSIX */
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
@@ -685,6 +694,9 @@ const struct file_operations cifs_file_d
 	.splice_read = generic_file_splice_read,
 #ifdef CONFIG_CIFS_POSIX
 	.unlocked_ioctl = cifs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = cifs_compat_ioctl,
+#endif
 #endif /* CONFIG_CIFS_POSIX */
 	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
@@ -700,6 +712,9 @@ const struct file_operations cifs_dir_op
 	.dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 	.unlocked_ioctl = cifs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl = cifs_compat_ioctl,
+#endif
 };
 
 static void
Index: linux/fs/cifs/cifsfs.h
===================================================================
--- linux.orig/fs/cifs/cifsfs.h
+++ linux/fs/cifs/cifsfs.h
@@ -101,6 +101,8 @@ extern ssize_t	cifs_getxattr(struct dent
 extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
 extern long cifs_ioctl(struct file *filep, unsigned int command,
 		unsigned long arg);
+extern long cifs_compat_ioctl(struct file *filep, unsigned int command,
+			unsigned long arg);
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 extern const struct export_operations cifs_export_ops;
Index: linux/fs/cifs/ioctl.c
===================================================================
--- linux.orig/fs/cifs/ioctl.c
+++ linux/fs/cifs/ioctl.c
@@ -108,3 +108,22 @@ long cifs_ioctl(struct file *filep, unsi
 	FreeXid(xid);
 	return rc;
 }
+
+#ifdef CONFIG_COMPAT
+#define  FS_IOC_GETFLAGS32		   _IOR('f', 1, int)
+#define  FS_IOC_SETFLAGS32		   _IOR('f', 2, int)
+
+long cifs_compat_ioctl(struct file *f, unsigned int command, unsigned long arg)
+{
+	/* Native ioctl is just mistyped, the real type is always int */
+	switch (command) {
+	case FS_IOC_GETFLAGS32:
+		command = FS_IOC_GETFLAGS;
+		break;
+	case FS_IOC_SETFLAGS32:
+		command = FS_IOC_SETFLAGS;
+		break;
+	}
+	return cifs_ioctl(f, command, arg);
+}
+#endif