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kernel: channel: implement channel_read_msg and msg_read

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This commit is contained in:
max 🍓
2026-02-23 21:51:59 +00:00
parent 11c741bd68
commit 1c7c90ef39
4 changed files with 120 additions and 31 deletions
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46
kernel/channel.c
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@@ -158,7 +158,8 @@ extern kern_status_t channel_recv_msg(
0,
msg->msg_req.msg_data,
msg->msg_req.msg_data_count,
VM_REGION_COPY_ALL);
VM_REGION_COPY_ALL,
NULL);
if (status != KERN_OK) {
kmsg_reply_error(msg, status, &msg_lock_flags);
return status;
@@ -216,7 +217,8 @@ extern kern_status_t channel_reply_msg(
0,
resp->msg_data,
resp->msg_data_count,
VM_REGION_COPY_ALL);
VM_REGION_COPY_ALL,
NULL);
if (status != KERN_OK) {
kmsg_reply_error(msg, status, &msg_lock_flags);
return status;
@@ -241,21 +243,49 @@ extern kern_status_t channel_reply_msg(
extern kern_status_t channel_read_msg(
struct channel *channel,
msgid_t msg,
msgid_t id,
size_t offset,
void *buf,
size_t len,
struct vm_region *dest_region,
const struct iovec *dest_iov,
size_t dest_iov_count,
size_t *nr_read)
{
return KERN_UNIMPLEMENTED;
unsigned long msg_lock_flags;
struct kmsg *msg = get_msg_with_id(&channel->c_msg, id);
if (!msg) {
return KERN_INVALID_ARGUMENT;
}
spin_lock_irqsave(&msg->msg_lock, &msg_lock_flags);
if (msg->msg_status != KMSG_WAIT_REPLY) {
spin_unlock_irqrestore(&msg->msg_lock, msg_lock_flags);
return KERN_INVALID_ARGUMENT;
}
kern_status_t status = vm_region_memmove_v(
dest_region,
0,
dest_iov,
dest_iov_count,
msg->msg_sender_thread->tr_parent->t_address_space,
offset,
msg->msg_req.msg_data,
msg->msg_req.msg_data_count,
VM_REGION_COPY_ALL,
nr_read);
spin_unlock_irqrestore(&msg->msg_lock, msg_lock_flags);
return status;
}
extern kern_status_t channel_write_msg(
struct channel *channel,
msgid_t msg,
size_t offset,
const void *buf,
size_t len,
struct vm_region *src_region,
const struct iovec *src_iov,
size_t src_iov_count,
size_t *nr_written)
{
return KERN_UNIMPLEMENTED;