lkml.org 
[lkml]   [2007]   [May]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 3/3] ieee1394: raw1394: Add ioctl() for 32bit userland on 64bit kernel
Date: Mon, 7 May 2007 04:14:47 +0200
From: Petr Vandrovec <petr@vandrovec.name>

Add compat_ioctl. Although all structures are more or less same,
raw1394_iso_packets got pointer inside, and raw1394_cycle_timer got unwanted
padding in the middle. I did not add any translation for ioctls passing array
of integers around as integers seem to have same size (32 bits) on all
architectures supported by Linux.

Signed-off-by: Petr Vandrovec <petr@vandrovec.name>
Acked-by: Dan Dennedy <dan@dennedy.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (split into 3 patches)
---
drivers/ieee1394/raw1394.c | 97 ++++++++++++++++++++++++++++++++++++-
1 file changed, 96 insertions(+), 1 deletion(-)

patch update: omitted trailing whitespace

Index: linux-2.6.22-rc1/drivers/ieee1394/raw1394.c
===================================================================
--- linux-2.6.22-rc1.orig/drivers/ieee1394/raw1394.c
+++ linux-2.6.22-rc1/drivers/ieee1394/raw1394.c
@@ -2803,6 +2803,99 @@ static int raw1394_ioctl(struct inode *i
return -EINVAL;
}

+#ifdef CONFIG_COMPAT
+struct raw1394_iso_packets32 {
+ __u32 n_packets;
+ compat_uptr_t infos;
+} __attribute__((packed));
+
+struct raw1394_cycle_timer32 {
+ __u32 cycle_timer;
+ __u64 local_time;
+} __attribute__((packed));
+
+#define RAW1394_IOC_ISO_RECV_PACKETS32 \
+ _IOW ('#', 0x25, struct raw1394_iso_packets32)
+#define RAW1394_IOC_ISO_XMIT_PACKETS32 \
+ _IOW ('#', 0x27, struct raw1394_iso_packets32)
+#define RAW1394_IOC_GET_CYCLE_TIMER32 \
+ _IOR ('#', 0x30, struct raw1394_cycle_timer32)
+
+static long raw1394_iso_xmit_recv_packets32(struct file *file, unsigned int cmd,
+ struct raw1394_iso_packets32 __user *arg)
+{
+ compat_uptr_t infos32;
+ void *infos;
+ long err = -EFAULT;
+ struct raw1394_iso_packets __user *dst = compat_alloc_user_space(sizeof(struct raw1394_iso_packets));
+
+ if (!copy_in_user(&dst->n_packets, &arg->n_packets, sizeof arg->n_packets) &&
+ !copy_from_user(&infos32, &arg->infos, sizeof infos32)) {
+ infos = compat_ptr(infos32);
+ if (!copy_to_user(&dst->infos, &infos, sizeof infos))
+ err = raw1394_ioctl(NULL, file, cmd, (unsigned long)dst);
+ }
+ return err;
+}
+
+static long raw1394_read_cycle_timer32(struct file_info *fi, void __user * uaddr)
+{
+ struct raw1394_cycle_timer32 ct;
+ int err;
+
+ err = hpsb_read_cycle_timer(fi->host, &ct.cycle_timer, &ct.local_time);
+ if (!err)
+ if (copy_to_user(uaddr, &ct, sizeof(ct)))
+ err = -EFAULT;
+ return err;
+}
+
+static long raw1394_compat_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct file_info *fi = file->private_data;
+ void __user *argp = (void __user *)arg;
+ long err;
+
+ lock_kernel();
+ switch (cmd) {
+ /* These requests have same format as long as 'int' has same size. */
+ case RAW1394_IOC_ISO_RECV_INIT:
+ case RAW1394_IOC_ISO_RECV_START:
+ case RAW1394_IOC_ISO_RECV_LISTEN_CHANNEL:
+ case RAW1394_IOC_ISO_RECV_UNLISTEN_CHANNEL:
+ case RAW1394_IOC_ISO_RECV_SET_CHANNEL_MASK:
+ case RAW1394_IOC_ISO_RECV_RELEASE_PACKETS:
+ case RAW1394_IOC_ISO_RECV_FLUSH:
+ case RAW1394_IOC_ISO_XMIT_RECV_STOP:
+ case RAW1394_IOC_ISO_XMIT_INIT:
+ case RAW1394_IOC_ISO_XMIT_START:
+ case RAW1394_IOC_ISO_XMIT_SYNC:
+ case RAW1394_IOC_ISO_GET_STATUS:
+ case RAW1394_IOC_ISO_SHUTDOWN:
+ case RAW1394_IOC_ISO_QUEUE_ACTIVITY:
+ err = raw1394_ioctl(NULL, file, cmd, arg);
+ break;
+ /* These request have different format. */
+ case RAW1394_IOC_ISO_RECV_PACKETS32:
+ err = raw1394_iso_xmit_recv_packets32(file, RAW1394_IOC_ISO_RECV_PACKETS, argp);
+ break;
+ case RAW1394_IOC_ISO_XMIT_PACKETS32:
+ err = raw1394_iso_xmit_recv_packets32(file, RAW1394_IOC_ISO_XMIT_PACKETS, argp);
+ break;
+ case RAW1394_IOC_GET_CYCLE_TIMER32:
+ err = raw1394_read_cycle_timer32(fi, argp);
+ break;
+ default:
+ err = -EINVAL;
+ break;
+ }
+ unlock_kernel();
+
+ return err;
+}
+#endif
+
static unsigned int raw1394_poll(struct file *file, poll_table * pt)
{
struct file_info *fi = file->private_data;
@@ -3042,7 +3135,9 @@ static const struct file_operations raw1
.write = raw1394_write,
.mmap = raw1394_mmap,
.ioctl = raw1394_ioctl,
- // .compat_ioctl = ... someone needs to do this
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = raw1394_compat_ioctl,
+#endif
.poll = raw1394_poll,
.open = raw1394_open,
.release = raw1394_release,
--
Stefan Richter
-=====-=-=== -=-= =----
http://arcgraph.de/sr/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-05-16 01:05    [W:1.152 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site