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connector: add portid to unicast in addition to broadcasting 

This allows replying only to the requestor portid while still
supporting broadcasting.  Pass 0 to portid for the previous behavior.

Signed-off-by: David Fries <David@Fries.net>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Fries 2014-01-15 22:29:19 -06:00 committed by Greg Kroah-Hartman
parent 9fcbbac5de
commit ac8f73305e
9 changed files with 37 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/connector/cn_test.c
View File

@ -145,7 +145,7 @@ static void cn_test_timer_func(unsigned long __data)
memcpy(m + 1, data, m->len);
cn_netlink_send(m, 0, GFP_ATOMIC);
cn_netlink_send(m, 0, 0, GFP_ATOMIC);
kfree(m);
}

18
drivers/connector/cn_proc.c
View File

@ -95,7 +95,7 @@ void proc_fork_connector(struct task_struct *task)
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
/* If cn_netlink_send() failed, the data is not sent */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
void proc_exec_connector(struct task_struct *task)
@ -122,7 +122,7 @@ void proc_exec_connector(struct task_struct *task)
msg->ack = 0; /* not used */
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
void proc_id_connector(struct task_struct *task, int which_id)
@ -163,7 +163,7 @@ void proc_id_connector(struct task_struct *task, int which_id)
msg->ack = 0; /* not used */
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
void proc_sid_connector(struct task_struct *task)
@ -190,7 +190,7 @@ void proc_sid_connector(struct task_struct *task)
msg->ack = 0; /* not used */
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
void proc_ptrace_connector(struct task_struct *task, int ptrace_id)
@ -225,7 +225,7 @@ void proc_ptrace_connector(struct task_struct *task, int ptrace_id)
msg->ack = 0; /* not used */
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
void proc_comm_connector(struct task_struct *task)
@ -253,7 +253,7 @@ void proc_comm_connector(struct task_struct *task)
msg->ack = 0; /* not used */
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
void proc_coredump_connector(struct task_struct *task)
@ -280,7 +280,7 @@ void proc_coredump_connector(struct task_struct *task)
msg->ack = 0; /* not used */
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
void proc_exit_connector(struct task_struct *task)
@ -309,7 +309,7 @@ void proc_exit_connector(struct task_struct *task)
msg->ack = 0; /* not used */
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
/*
@ -343,7 +343,7 @@ static void cn_proc_ack(int err, int rcvd_seq, int rcvd_ack)
msg->ack = rcvd_ack + 1;
msg->len = sizeof(*ev);
msg->flags = 0; /* not used */
cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL);
cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL);
}
/**

20
drivers/connector/connector.c
View File

@ -50,7 +50,7 @@ static int cn_already_initialized;
*
* Sequence number is incremented with each message to be sent.
*
* If we expect reply to our message then the sequence number in
* If we expect a reply to our message then the sequence number in
* received message MUST be the same as in original message, and
* acknowledge number MUST be the same + 1.
*
@ -62,8 +62,11 @@ static int cn_already_initialized;
* the acknowledgement number in the original message + 1, then it is
* a new message.
*
* The message is sent to, the portid if given, the group if given, both if
* both, or if both are zero then the group is looked up and sent there.
*/
int cn_netlink_send(struct cn_msg *msg, u32 __group, gfp_t gfp_mask)
int cn_netlink_send(struct cn_msg *msg, u32 portid, u32 __group,
gfp_t gfp_mask)
{
struct cn_callback_entry *__cbq;
unsigned int size;
@ -74,7 +77,9 @@ int cn_netlink_send(struct cn_msg *msg, u32 __group, gfp_t gfp_mask)
u32 group = 0;
int found = 0;
if (!__group) {
if (portid || __group) {
group = __group;
} else {
spin_lock_bh(&dev->cbdev->queue_lock);
list_for_each_entry(__cbq, &dev->cbdev->queue_list,
callback_entry) {
@ -88,11 +93,9 @@ int cn_netlink_send(struct cn_msg *msg, u32 __group, gfp_t gfp_mask)
if (!found)
return -ENODEV;
} else {
group = __group;
}
if (!netlink_has_listeners(dev->nls, group))
if (!portid && !netlink_has_listeners(dev->nls, group))
return -ESRCH;
size = sizeof(*msg) + msg->len;
@ -113,7 +116,10 @@ int cn_netlink_send(struct cn_msg *msg, u32 __group, gfp_t gfp_mask)
NETLINK_CB(skb).dst_group = group;
return netlink_broadcast(dev->nls, skb, 0, group, gfp_mask);
if (group)
return netlink_broadcast(dev->nls, skb, portid, group,
gfp_mask);
return netlink_unicast(dev->nls, skb, portid, !(gfp_mask&__GFP_WAIT));
}
EXPORT_SYMBOL_GPL(cn_netlink_send);

4
drivers/hv/hv_kvp.c
View File

@ -113,7 +113,7 @@ kvp_register(int reg_value)
kvp_msg->kvp_hdr.operation = reg_value;
strcpy(version, HV_DRV_VERSION);
msg->len = sizeof(struct hv_kvp_msg);
cn_netlink_send(msg, 0, GFP_ATOMIC);
cn_netlink_send(msg, 0, 0, GFP_ATOMIC);
kfree(msg);
}
}
@ -435,7 +435,7 @@ kvp_send_key(struct work_struct *dummy)
}
msg->len = sizeof(struct hv_kvp_msg);
cn_netlink_send(msg, 0, GFP_ATOMIC);
cn_netlink_send(msg, 0, 0, GFP_ATOMIC);
kfree(msg);
return;

2
drivers/hv/hv_snapshot.c
View File

@ -98,7 +98,7 @@ static void vss_send_op(struct work_struct *dummy)
vss_msg->vss_hdr.operation = op;
msg->len = sizeof(struct hv_vss_msg);
cn_netlink_send(msg, 0, GFP_ATOMIC);
cn_netlink_send(msg, 0, 0, GFP_ATOMIC);
kfree(msg);
return;

2
drivers/md/dm-log-userspace-transfer.c
View File

@ -66,7 +66,7 @@ static int dm_ulog_sendto_server(struct dm_ulog_request *tfr)
msg->seq = tfr->seq;
msg->len = sizeof(struct dm_ulog_request) + tfr->data_size;
r = cn_netlink_send(msg, 0, gfp_any());
r = cn_netlink_send(msg, 0, 0, gfp_any());
return r;
}

4
drivers/video/uvesafb.c
View File

@ -190,7 +190,7 @@ static int uvesafb_exec(struct uvesafb_ktask *task)
uvfb_tasks[seq] = task;
mutex_unlock(&uvfb_lock);
err = cn_netlink_send(m, 0, GFP_KERNEL);
err = cn_netlink_send(m, 0, 0, GFP_KERNEL);
if (err == -ESRCH) {
/*
* Try to start the userspace helper if sending
@ -204,7 +204,7 @@ static int uvesafb_exec(struct uvesafb_ktask *task)
"helper is installed and executable\n");
} else {
v86d_started = 1;
err = cn_netlink_send(m, 0, gfp_any());
err = cn_netlink_send(m, 0, 0, gfp_any());
if (err == -ENOBUFS)
err = 0;
}

14
drivers/w1/w1_netlink.c
View File

@ -45,7 +45,7 @@ void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg)
memcpy(w, msg, sizeof(struct w1_netlink_msg));
cn_netlink_send(m, 0, GFP_KERNEL);
cn_netlink_send(m, 0, 0, GFP_KERNEL);
}
static void w1_send_slave(struct w1_master *dev, u64 rn)
@ -60,7 +60,7 @@ static void w1_send_slave(struct w1_master *dev, u64 rn)
if (avail < 8) {
msg->ack++;
cn_netlink_send(msg, 0, GFP_KERNEL);
cn_netlink_send(msg, 0, 0, GFP_KERNEL);
msg->len = sizeof(struct w1_netlink_msg) +
sizeof(struct w1_netlink_cmd);
@ -131,7 +131,7 @@ static int w1_get_slaves(struct w1_master *dev,
}
msg->ack = 0;
cn_netlink_send(msg, 0, GFP_KERNEL);
cn_netlink_send(msg, 0, 0, GFP_KERNEL);
dev->priv = NULL;
dev->priv_size = 0;
@ -173,7 +173,7 @@ static int w1_send_read_reply(struct cn_msg *msg, struct w1_netlink_msg *hdr,
memcpy(c->data, cmd->data, c->len);
err = cn_netlink_send(cm, 0, GFP_KERNEL);
err = cn_netlink_send(cm, 0, 0, GFP_KERNEL);
kfree(data);
@ -316,7 +316,7 @@ static int w1_process_command_root(struct cn_msg *msg, struct w1_netlink_msg *mc
mutex_lock(&w1_mlock);
list_for_each_entry(m, &w1_masters, w1_master_entry) {
if (cn->len + sizeof(*id) > PAGE_SIZE - sizeof(struct cn_msg)) {
cn_netlink_send(cn, 0, GFP_KERNEL);
cn_netlink_send(cn, 0, 0, GFP_KERNEL);
cn->ack++;
cn->len = sizeof(struct w1_netlink_msg);
w->len = 0;
@ -329,7 +329,7 @@ static int w1_process_command_root(struct cn_msg *msg, struct w1_netlink_msg *mc
id++;
}
cn->ack = 0;
cn_netlink_send(cn, 0, GFP_KERNEL);
cn_netlink_send(cn, 0, 0, GFP_KERNEL);
mutex_unlock(&w1_mlock);
kfree(cn);
@ -364,7 +364,7 @@ static int w1_netlink_send_error(struct cn_msg *rcmsg, struct w1_netlink_msg *rm
cmsg->len += sizeof(*cmd);
}
error = cn_netlink_send(cmsg, 0, GFP_KERNEL);
error = cn_netlink_send(cmsg, 0, 0, GFP_KERNEL);
kfree(cmsg);
return error;

2
include/linux/connector.h
View File

@ -71,7 +71,7 @@ struct cn_dev {
int cn_add_callback(struct cb_id *id, const char *name,
void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
void cn_del_callback(struct cb_id *);
int cn_netlink_send(struct cn_msg *, u32, gfp_t);
int cn_netlink_send(struct cn_msg *msg, u32 portid, u32 group, gfp_t gfp_mask);
int cn_queue_add_callback(struct cn_queue_dev *dev, const char *name,
struct cb_id *id,