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osmo_io: Make {write,sendto,sendmsg} completion callback optional 

There are situations (like multicast datagram transmit) where we don't
really care about the result of a write operation, and hence don't need
a write completion callback.

As the completed message buffer is free'd by core osmo_io, there is no leak
in doing so.

Change-Id: I0c071a29e508884bac331ada5e510bbfcf440bbf
This commit is contained in:
Harald Welte 2024-03-16 19:04:15 +01:00
parent e988ec3b53
commit 4ec4a38f92
1 changed files with 6 additions and 15 deletions
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21
src/core/osmo_io.c
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@ -397,13 +397,16 @@ void iofd_handle_send_completion(struct osmo_io_fd *iofd, int rc, struct iofd_ms
/* All other failure and success cases are handled here */
switch (msghdr->action) {
case IOFD_ACT_WRITE:
iofd->io_ops.write_cb(iofd, rc, msg);
if (iofd->io_ops.write_cb)
iofd->io_ops.write_cb(iofd, rc, msg);
break;
case IOFD_ACT_SENDTO:
iofd->io_ops.sendto_cb(iofd, rc, msg, &msghdr->osa);
if (iofd->io_ops.sendto_cb)
iofd->io_ops.sendto_cb(iofd, rc, msg, &msghdr->osa);
break;
case IOFD_ACT_SENDMSG:
iofd->io_ops.sendmsg_cb(iofd, rc, msg);
if (iofd->io_ops.sendmsg_cb)
iofd->io_ops.sendmsg_cb(iofd, rc, msg);
break;
default:
OSMO_ASSERT(0);
@ -439,10 +442,6 @@ int osmo_iofd_write_msgb(struct osmo_io_fd *iofd, struct msgb *msg)
}
OSMO_ASSERT(iofd->mode == OSMO_IO_FD_MODE_READ_WRITE);
if (OSMO_UNLIKELY(!iofd->io_ops.write_cb)) {
LOGPIO(iofd, LOGL_ERROR, "write_cb not set, Rejecting msgb\n");
return -EINVAL;
}
struct iofd_msghdr *msghdr = iofd_msghdr_alloc(iofd, IOFD_ACT_WRITE, msg, 0);
if (!msghdr)
@ -490,10 +489,6 @@ int osmo_iofd_sendto_msgb(struct osmo_io_fd *iofd, struct msgb *msg, int sendto_
}
OSMO_ASSERT(iofd->mode == OSMO_IO_FD_MODE_RECVFROM_SENDTO);
if (OSMO_UNLIKELY(!iofd->io_ops.sendto_cb)) {
LOGPIO(iofd, LOGL_ERROR, "sendto_cb not set, Rejecting msgb\n");
return -EINVAL;
}
struct iofd_msghdr *msghdr = iofd_msghdr_alloc(iofd, IOFD_ACT_SENDTO, msg, 0);
if (!msghdr)
@ -547,10 +542,6 @@ int osmo_iofd_sendmsg_msgb(struct osmo_io_fd *iofd, struct msgb *msg, int sendms
}
OSMO_ASSERT(iofd->mode == OSMO_IO_FD_MODE_RECVMSG_SENDMSG);
if (OSMO_UNLIKELY(!iofd->io_ops.sendmsg_cb)) {
LOGPIO(iofd, LOGL_ERROR, "sendmsg_cb not set, Rejecting msgb\n");
return -EINVAL;
}
if (OSMO_UNLIKELY(msgh->msg_namelen > sizeof(msghdr->osa))) {
LOGPIO(iofd, LOGL_ERROR, "osmo_iofd_sendmsg msg_namelen (%u) > supported %zu bytes\n",