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Subject[PATCH 4/4] [MTD] Add OOB ioctls for >4GiB devices
From
Signed-off-by: Kevin Cernekee <kpc.mtd@gmail.com>

---
drivers/mtd/mtdchar.c | 28 ++++++++++++++++++++++++++++
fs/compat_ioctl.c | 2 ++
include/mtd/mtd-abi.h | 9 +++++++++
3 files changed, 39 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 51bb0b0..99d1fbc 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 1db8d41..5f7b8a1 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 2e32be1..be51ae2 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
--
1.5.4.3

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