| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20230523075358.9672-35-tiwai@suse.de>
Date: Tue, 23 May 2023 09:53:55 +0200
From: Takashi Iwai <tiwai@...e.de>
To: alsa-devel@...a-project.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH v2 34/37] ALSA: seq: Add ioctls for client UMP info query and setup
Add new ioctls for sequencer clients to query and set the UMP endpoint
and block information.
As a sequencer client corresponds to a UMP Endpoint, one UMP Endpoint
information can be assigned at most to a single sequencer client while
multiple UMP block infos can be assigned by passing the type with the
offset of block id (i.e. type = block_id + 1).
For the kernel client, only SNDRV_SEQ_IOCTL_GET_CLIENT_UMP_INFO is
allowed.
Reviewed-by: Jaroslav Kysela <perex@...ex.cz>
Signed-off-by: Takashi Iwai <tiwai@...e.de>
---
include/uapi/sound/asequencer.h | 14 ++++
sound/core/seq/seq_clientmgr.c | 120 +++++++++++++++++++++++++++++++-
sound/core/seq/seq_clientmgr.h | 4 +-
sound/core/seq/seq_compat.c | 2 +
sound/core/seq/seq_ump_client.c | 15 ++++
5 files changed, 153 insertions(+), 2 deletions(-)
diff --git a/include/uapi/sound/asequencer.h b/include/uapi/sound/asequencer.h
index 3fa6b17aa7a2..c75f594f21e3 100644
--- a/include/uapi/sound/asequencer.h
+++ b/include/uapi/sound/asequencer.h
@@ -585,6 +585,18 @@ struct snd_seq_query_subs {
char reserved[64]; /* for future use */
};
+/*
+ * UMP-specific information
+ */
+/* type of UMP info query */
+#define SNDRV_SEQ_CLIENT_UMP_INFO_ENDPOINT 0
+#define SNDRV_SEQ_CLIENT_UMP_INFO_BLOCK 1
+
+struct snd_seq_client_ump_info {
+ int client; /* client number to inquire/set */
+ int type; /* type to inquire/set */
+ unsigned char info[512]; /* info (either UMP ep or block info) */
+} __packed;
/*
* IOCTL commands
@@ -598,6 +610,8 @@ struct snd_seq_query_subs {
#define SNDRV_SEQ_IOCTL_GET_CLIENT_INFO _IOWR('S', 0x10, struct snd_seq_client_info)
#define SNDRV_SEQ_IOCTL_SET_CLIENT_INFO _IOW ('S', 0x11, struct snd_seq_client_info)
+#define SNDRV_SEQ_IOCTL_GET_CLIENT_UMP_INFO _IOWR('S', 0x12, struct snd_seq_client_ump_info)
+#define SNDRV_SEQ_IOCTL_SET_CLIENT_UMP_INFO _IOWR('S', 0x13, struct snd_seq_client_ump_info)
#define SNDRV_SEQ_IOCTL_CREATE_PORT _IOWR('S', 0x20, struct snd_seq_port_info)
#define SNDRV_SEQ_IOCTL_DELETE_PORT _IOW ('S', 0x21, struct snd_seq_port_info)
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index 3b1adcb1ccdd..03ca78ea2cce 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -14,6 +14,7 @@
#include <linux/kmod.h>
#include <sound/seq_kernel.h>
+#include <sound/ump.h>
#include "seq_clientmgr.h"
#include "seq_memory.h"
#include "seq_queue.h"
@@ -71,6 +72,10 @@ static int snd_seq_deliver_single_event(struct snd_seq_client *client,
struct snd_seq_event *event,
int filter, int atomic, int hop);
+#if IS_ENABLED(CONFIG_SND_SEQ_UMP)
+static void free_ump_info(struct snd_seq_client *client);
+#endif
+
/*
*/
static inline unsigned short snd_seq_file_flags(struct file *file)
@@ -382,6 +387,9 @@ static int snd_seq_release(struct inode *inode, struct file *file)
seq_free_client(client);
if (client->data.user.fifo)
snd_seq_fifo_delete(&client->data.user.fifo);
+#if IS_ENABLED(CONFIG_SND_SEQ_UMP)
+ free_ump_info(client);
+#endif
put_pid(client->data.user.owner);
kfree(client);
}
@@ -1282,7 +1290,6 @@ static int snd_seq_ioctl_set_client_info(struct snd_seq_client *client,
if (client->user_pversion >= SNDRV_PROTOCOL_VERSION(1, 0, 3))
client->midi_version = client_info->midi_version;
memcpy(client->event_filter, client_info->event_filter, 32);
-
return 0;
}
@@ -2087,6 +2094,108 @@ static int snd_seq_ioctl_query_next_port(struct snd_seq_client *client,
return 0;
}
+#if IS_ENABLED(CONFIG_SND_SEQ_UMP)
+#define NUM_UMP_INFOS (SNDRV_UMP_MAX_BLOCKS + 1)
+
+static void free_ump_info(struct snd_seq_client *client)
+{
+ int i;
+
+ if (!client->ump_info)
+ return;
+ for (i = 0; i < NUM_UMP_INFOS; i++)
+ kfree(client->ump_info[i]);
+ kfree(client->ump_info);
+ client->ump_info = NULL;
+}
+
+static void terminate_ump_info_strings(void *p, int type)
+{
+ if (type == SNDRV_SEQ_CLIENT_UMP_INFO_ENDPOINT) {
+ struct snd_ump_endpoint_info *ep = p;
+ ep->name[sizeof(ep->name) - 1] = 0;
+ } else {
+ struct snd_ump_block_info *bp = p;
+ bp->name[sizeof(bp->name) - 1] = 0;
+ }
+}
+
+/* UMP-specific ioctls -- called directly without data copy */
+static int snd_seq_ioctl_client_ump_info(struct snd_seq_client *caller,
+ unsigned int cmd,
+ unsigned long arg)
+{
+ struct snd_seq_client_ump_info __user *argp =
+ (struct snd_seq_client_ump_info __user *)arg;
+ struct snd_seq_client *cptr;
+ int client, type, err = 0;
+ size_t size;
+ void *p;
+
+ if (get_user(client, &argp->client) || get_user(type, &argp->type))
+ return -EFAULT;
+ if (cmd == SNDRV_SEQ_IOCTL_SET_CLIENT_UMP_INFO &&
+ caller->number != client)
+ return -EPERM;
+ if (type < 0 || type >= NUM_UMP_INFOS)
+ return -EINVAL;
+ if (type == SNDRV_SEQ_CLIENT_UMP_INFO_ENDPOINT)
+ size = sizeof(struct snd_ump_endpoint_info);
+ else
+ size = sizeof(struct snd_ump_block_info);
+ cptr = snd_seq_client_use_ptr(client);
+ if (!cptr)
+ return -ENOENT;
+
+ mutex_lock(&cptr->ioctl_mutex);
+ if (!cptr->midi_version) {
+ err = -EBADFD;
+ goto error;
+ }
+
+ if (cmd == SNDRV_SEQ_IOCTL_GET_CLIENT_UMP_INFO) {
+ if (!cptr->ump_info)
+ p = NULL;
+ else
+ p = cptr->ump_info[type];
+ if (!p) {
+ err = -ENODEV;
+ goto error;
+ }
+ if (copy_to_user(argp->info, p, size)) {
+ err = -EFAULT;
+ goto error;
+ }
+ } else {
+ if (cptr->type != USER_CLIENT) {
+ err = -EBADFD;
+ goto error;
+ }
+ if (!cptr->ump_info) {
+ cptr->ump_info = kcalloc(NUM_UMP_INFOS,
+ sizeof(void *), GFP_KERNEL);
+ if (!cptr->ump_info) {
+ err = -ENOMEM;
+ goto error;
+ }
+ }
+ p = memdup_user(argp->info, size);
+ if (IS_ERR(p)) {
+ err = PTR_ERR(p);
+ goto error;
+ }
+ kfree(cptr->ump_info[type]);
+ terminate_ump_info_strings(p, type);
+ cptr->ump_info[type] = p;
+ }
+
+ error:
+ mutex_unlock(&cptr->ioctl_mutex);
+ snd_seq_client_unlock(cptr);
+ return err;
+}
+#endif
+
/* -------------------------------------------------------- */
static const struct ioctl_handler {
@@ -2157,6 +2266,15 @@ static long snd_seq_ioctl(struct file *file, unsigned int cmd,
if (snd_BUG_ON(!client))
return -ENXIO;
+#if IS_ENABLED(CONFIG_SND_SEQ_UMP)
+ /* exception - handling large data */
+ switch (cmd) {
+ case SNDRV_SEQ_IOCTL_GET_CLIENT_UMP_INFO:
+ case SNDRV_SEQ_IOCTL_SET_CLIENT_UMP_INFO:
+ return snd_seq_ioctl_client_ump_info(client, cmd, arg);
+ }
+#endif
+
for (handler = ioctl_handlers; handler->cmd > 0; ++handler) {
if (handler->cmd == cmd)
break;
diff --git a/sound/core/seq/seq_clientmgr.h b/sound/core/seq/seq_clientmgr.h
index 97762892ffab..be3fe555f233 100644
--- a/sound/core/seq/seq_clientmgr.h
+++ b/sound/core/seq/seq_clientmgr.h
@@ -12,7 +12,6 @@
#include "seq_ports.h"
#include "seq_lock.h"
-
/* client manager */
struct snd_seq_user_client {
@@ -59,6 +58,9 @@ struct snd_seq_client {
struct snd_seq_user_client user;
struct snd_seq_kernel_client kernel;
} data;
+
+ /* for UMP */
+ void **ump_info;
};
/* usage statistics */
diff --git a/sound/core/seq/seq_compat.c b/sound/core/seq/seq_compat.c
index c0ce6236dc7f..1e35bf086a51 100644
--- a/sound/core/seq/seq_compat.c
+++ b/sound/core/seq/seq_compat.c
@@ -86,6 +86,8 @@ static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned l
case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
+ case SNDRV_SEQ_IOCTL_GET_CLIENT_UMP_INFO:
+ case SNDRV_SEQ_IOCTL_SET_CLIENT_UMP_INFO:
case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
diff --git a/sound/core/seq/seq_ump_client.c b/sound/core/seq/seq_ump_client.c
index 600b061ac8c3..e24833804094 100644
--- a/sound/core/seq/seq_ump_client.c
+++ b/sound/core/seq/seq_ump_client.c
@@ -47,6 +47,7 @@ struct seq_ump_client {
struct snd_rawmidi_file out_rfile; /* rawmidi for output */
struct seq_ump_input_buffer input; /* input parser context */
struct seq_ump_group groups[SNDRV_UMP_MAX_GROUPS]; /* table of groups */
+ void *ump_info[SNDRV_UMP_MAX_BLOCKS + 1]; /* shadow of seq client ump_info */
};
/* number of 32bit words for each UMP message type */
@@ -384,6 +385,8 @@ static int snd_seq_ump_probe(struct device *_dev)
struct snd_ump_endpoint *ump = dev->private_data;
struct snd_card *card = dev->card;
struct seq_ump_client *client;
+ struct snd_ump_block *fb;
+ struct snd_seq_client *cptr;
int p, err;
client = kzalloc(sizeof(*client), GFP_KERNEL);
@@ -400,6 +403,10 @@ static int snd_seq_ump_probe(struct device *_dev)
goto error;
}
+ client->ump_info[0] = &ump->info;
+ list_for_each_entry(fb, &ump->block_list, list)
+ client->ump_info[fb->info.block_id + 1] = &fb->info;
+
setup_client_midi_version(client);
update_group_attrs(client);
@@ -413,6 +420,14 @@ static int snd_seq_ump_probe(struct device *_dev)
if (err < 0)
goto error;
+ cptr = snd_seq_kernel_client_get(client->seq_client);
+ if (!cptr) {
+ err = -EINVAL;
+ goto error;
+ }
+ cptr->ump_info = client->ump_info;
+ snd_seq_kernel_client_put(cptr);
+
ump->seq_client = client;
ump->seq_ops = &seq_ump_ops;
return 0;
--
2.35.3
Powered by blists - more mailing lists