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[PATCH] x86_64: Implement compat code for raw1394 read/write

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Not for the ioctls so far because I was too lazy.

Cc: bcollins@debian.org
Cc: dan@dennedy.org
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andi Kleen 2006-03-25 16:30:07 +01:00 committed by Linus Torvalds
parent 60c1bc82d9
commit 4bc32c4d5c
1 changed files with 91 additions and 5 deletions
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96
drivers/ieee1394/raw1394.c
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@ -42,6 +42,7 @@
#include <asm/uaccess.h>
#include <asm/atomic.h>
#include <linux/devfs_fs_kernel.h>
#include <linux/compat.h>
#include "csr1212.h"
#include "ieee1394.h"
@ -406,6 +407,65 @@ static void fcp_request(struct hpsb_host *host, int nodeid, int direction,
queue_complete_req(req);
}
#ifdef CONFIG_COMPAT
struct compat_raw1394_req {
__u32 type;
__s32 error;
__u32 misc;
__u32 generation;
__u32 length;
__u64 address;
__u64 tag;
__u64 sendb;
__u64 recvb;
} __attribute__((packed));
static const char __user *raw1394_compat_write(const char __user *buf)
{
struct compat_raw1394_req __user *cr = (typeof(cr)) buf;
struct raw1394_request __user *r;
r = compat_alloc_user_space(sizeof(struct raw1394_request));
#define C(x) __copy_in_user(&r->x, &cr->x, sizeof(r->x))
if (copy_in_user(r, cr, sizeof(struct compat_raw1394_req)) ||
C(address) ||
C(tag) ||
C(sendb) ||
C(recvb))
return ERR_PTR(-EFAULT);
return (const char __user *)r;
}
#undef C
#define P(x) __put_user(r->x, &cr->x)
static int
raw1394_compat_read(const char __user *buf, struct raw1394_request *r)
{
struct compat_raw1394_req __user *cr = (typeof(cr)) r;
if (!access_ok(VERIFY_WRITE,cr,sizeof(struct compat_raw1394_req)) ||
P(type) ||
P(error) ||
P(misc) ||
P(generation) ||
P(length) ||
P(address) ||
P(tag) ||
P(sendb) ||
P(recvb))
return -EFAULT;
return sizeof(struct compat_raw1394_req);
}
#undef P
#endif
static ssize_t raw1394_read(struct file *file, char __user * buffer,
size_t count, loff_t * offset_is_ignored)
{
@ -415,6 +475,11 @@ static ssize_t raw1394_read(struct file *file, char __user * buffer,
struct pending_request *req;
ssize_t ret;
#ifdef CONFIG_COMPAT
if (count == sizeof(struct compat_raw1394_req)) {
/* ok */
} else
#endif
if (count != sizeof(struct raw1394_request)) {
return -EINVAL;
}
@ -446,12 +511,22 @@ static ssize_t raw1394_read(struct file *file, char __user * buffer,
req->req.error = RAW1394_ERROR_MEMFAULT;
}
}
if (copy_to_user(buffer, &req->req, sizeof(req->req))) {
ret = -EFAULT;
goto out;
}
ret = (ssize_t) sizeof(struct raw1394_request);
#ifdef CONFIG_COMPAT
if (count == sizeof(struct compat_raw1394_req) &&
sizeof(struct compat_raw1394_req) !=
sizeof(struct raw1394_request)) {
ret = raw1394_compat_read(buffer, &req->req);
} else
#endif
{
if (copy_to_user(buffer, &req->req, sizeof(req->req))) {
ret = -EFAULT;
goto out;
}
ret = (ssize_t) sizeof(struct raw1394_request);
}
out:
free_pending_request(req);
return ret;
@ -2274,6 +2349,7 @@ static int state_connected(struct file_info *fi, struct pending_request *req)
return handle_async_request(fi, req, node);
}
static ssize_t raw1394_write(struct file *file, const char __user * buffer,
size_t count, loff_t * offset_is_ignored)
{
@ -2281,6 +2357,15 @@ static ssize_t raw1394_write(struct file *file, const char __user * buffer,
struct pending_request *req;
ssize_t retval = 0;
#ifdef CONFIG_COMPAT
if (count == sizeof(struct compat_raw1394_req) &&
sizeof(struct compat_raw1394_req) !=
sizeof(struct raw1394_request)) {
buffer = raw1394_compat_write(buffer);
if (IS_ERR(buffer))
return PTR_ERR(buffer);
} else
#endif
if (count != sizeof(struct raw1394_request)) {
return -EINVAL;
}
@ -2893,6 +2978,7 @@ static struct file_operations raw1394_fops = {
.write = raw1394_write,
.mmap = raw1394_mmap,
.ioctl = raw1394_ioctl,
// .compat_ioctl = ... someone needs to do this
.poll = raw1394_poll,
.open = raw1394_open,
.release = raw1394_release,