mtd: add OOB ioctls for >4GiB devices

Signed-off-by: Kevin Cernekee <kpc.mtd@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

3 files changed, 39 insertions, 0 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 51bb0b092003..99d1fbc95011 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -607,6 +607,34 @@ static int mtd_ioctl(struct inode *inode, struct file *file,
                 break;
         }
 
+        case MEMWRITEOOB64:
+        {
+                struct mtd_oob_buf64 buf;
+                struct mtd_oob_buf64 __user *buf_user = argp;
+
+                if (copy_from_user(&buf, argp, sizeof(buf)))
+                        ret = -EFAULT;
+                else
+                        ret = mtd_do_writeoob(file, mtd, buf.start, buf.length,
+                                (void __user *)(uintptr_t)buf.usr_ptr,
+                                &buf_user->length);
+                break;
+        }
+
+        case MEMREADOOB64:
+        {
+                struct mtd_oob_buf64 buf;
+                struct mtd_oob_buf64 __user *buf_user = argp;
+
+                if (copy_from_user(&buf, argp, sizeof(buf)))
+                        ret = -EFAULT;
+                else
+                        ret = mtd_do_readoob(mtd, buf.start, buf.length,
+                                (void __user *)(uintptr_t)buf.usr_ptr,
+                                &buf_user->length);
+                break;
+        }
+
         case MEMLOCK:
         {
                 struct erase_info_user einfo;
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 196397bff086..8da222eacbaf 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -2411,6 +2411,8 @@ COMPATIBLE_IOCTL(ECCGETLAYOUT)
 COMPATIBLE_IOCTL(ECCGETSTATS)
 COMPATIBLE_IOCTL(MTDFILEMODE)
 COMPATIBLE_IOCTL(MEMERASE64)
+COMPATIBLE_IOCTL(MEMREADOOB64)
+COMPATIBLE_IOCTL(MEMWRITEOOB64)
 /* NBD */
 ULONG_IOCTL(NBD_SET_SOCK)
 ULONG_IOCTL(NBD_SET_BLKSIZE)
diff --git a/include/mtd/mtd-abi.h b/include/mtd/mtd-abi.h
index 2e32be1e3a1e..be51ae2bd0ff 100644
--- a/include/mtd/mtd-abi.h
+++ b/include/mtd/mtd-abi.h
@@ -23,6 +23,13 @@ struct mtd_oob_buf {
         unsigned char __user *ptr;
 };
 
+struct mtd_oob_buf64 {
+        __u64 start;
+        __u32 pad;
+        __u32 length;
+        __u64 usr_ptr;
+};
+
 #define MTD_ABSENT              0
 #define MTD_RAM                 1
 #define MTD_ROM                 2
@@ -101,6 +108,8 @@ struct otp_info {
 #define ECCGETSTATS             _IOR('M', 18, struct mtd_ecc_stats)
 #define MTDFILEMODE             _IO('M', 19)
 #define MEMERASE64              _IOW('M', 20, struct erase_info_user64)
+#define MEMWRITEOOB64           _IOWR('M', 21, struct mtd_oob_buf64)
+#define MEMREADOOB64            _IOWR('M', 22, struct mtd_oob_buf64)
 
 /*
  * Obsolete legacy interface. Keep it in order not to break userspace