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Diffstat (limited to 'sound/core/rawmidi_compat.c')
-rw-r--r--sound/core/rawmidi_compat.c120
1 files changed, 120 insertions, 0 deletions
diff --git a/sound/core/rawmidi_compat.c b/sound/core/rawmidi_compat.c
new file mode 100644
index 000000000000..d97631c3f3ad
--- /dev/null
+++ b/sound/core/rawmidi_compat.c
@@ -0,0 +1,120 @@
+/*
+ * 32bit -> 64bit ioctl wrapper for raw MIDI API
+ * Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+/* This file included from rawmidi.c */
+
+#include <linux/compat.h>
+
+struct sndrv_rawmidi_params32 {
+ s32 stream;
+ u32 buffer_size;
+ u32 avail_min;
+ unsigned int no_active_sensing; /* avoid bit-field */
+ unsigned char reserved[16];
+} __attribute__((packed));
+
+static int snd_rawmidi_ioctl_params_compat(snd_rawmidi_file_t *rfile,
+ struct sndrv_rawmidi_params32 __user *src)
+{
+ snd_rawmidi_params_t params;
+ unsigned int val;
+
+ if (rfile->output == NULL)
+ return -EINVAL;
+ if (get_user(params.stream, &src->stream) ||
+ get_user(params.buffer_size, &src->buffer_size) ||
+ get_user(params.avail_min, &src->avail_min) ||
+ get_user(val, &src->no_active_sensing))
+ return -EFAULT;
+ params.no_active_sensing = val;
+ switch (params.stream) {
+ case SNDRV_RAWMIDI_STREAM_OUTPUT:
+ return snd_rawmidi_output_params(rfile->output, &params);
+ case SNDRV_RAWMIDI_STREAM_INPUT:
+ return snd_rawmidi_input_params(rfile->input, &params);
+ }
+ return -EINVAL;
+}
+
+struct sndrv_rawmidi_status32 {
+ s32 stream;
+ struct compat_timespec tstamp;
+ u32 avail;
+ u32 xruns;
+ unsigned char reserved[16];
+} __attribute__((packed));
+
+static int snd_rawmidi_ioctl_status_compat(snd_rawmidi_file_t *rfile,
+ struct sndrv_rawmidi_status32 __user *src)
+{
+ int err;
+ snd_rawmidi_status_t status;
+
+ if (rfile->output == NULL)
+ return -EINVAL;
+ if (get_user(status.stream, &src->stream))
+ return -EFAULT;
+
+ switch (status.stream) {
+ case SNDRV_RAWMIDI_STREAM_OUTPUT:
+ err = snd_rawmidi_output_status(rfile->output, &status);
+ break;
+ case SNDRV_RAWMIDI_STREAM_INPUT:
+ err = snd_rawmidi_input_status(rfile->input, &status);
+ break;
+ default:
+ return -EINVAL;
+ }
+ if (err < 0)
+ return err;
+
+ if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
+ put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
+ put_user(status.avail, &src->avail) ||
+ put_user(status.xruns, &src->xruns))
+ return -EFAULT;
+
+ return 0;
+}
+
+enum {
+ SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct sndrv_rawmidi_params32),
+ SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct sndrv_rawmidi_status32),
+};
+
+static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ snd_rawmidi_file_t *rfile;
+ void __user *argp = compat_ptr(arg);
+
+ rfile = file->private_data;
+ switch (cmd) {
+ case SNDRV_RAWMIDI_IOCTL_PVERSION:
+ case SNDRV_RAWMIDI_IOCTL_INFO:
+ case SNDRV_RAWMIDI_IOCTL_DROP:
+ case SNDRV_RAWMIDI_IOCTL_DRAIN:
+ return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
+ case SNDRV_RAWMIDI_IOCTL_PARAMS32:
+ return snd_rawmidi_ioctl_params_compat(rfile, argp);
+ case SNDRV_RAWMIDI_IOCTL_STATUS32:
+ return snd_rawmidi_ioctl_status_compat(rfile, argp);
+ }
+ return -ENOIOCTLCMD;
+}