mirror of https://gerrit.osmocom.org/libosmocore
osmo_io: Move notify_connected function to backend
This relocation is necessary as the backend (osmo_io_fd or osmo_io_uring) requires a different approach in handling connect notifications. As a result, a function call has been introduced to struct iofd_backend_ops. In a subsequent patch, the process for the osmo_io_uring backend will be modified to handle SCTP connect notifications using poll/select. If connect notification is requested using poll/select, the file descriptior must be registered to osmo_fd, using osmo_fd_register. If read / write notification is requested by application, the file descriptior must be registered also. A flag is used prevent calling osmo_fd_register / osmo_fd_unregister multiple times, which would cause a crash. Change-Id: I905ec85210570aff8addadfc9603335d04eb057a Related: OS#5751
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@ -781,7 +781,8 @@ int osmo_iofd_set_ioops(struct osmo_io_fd *iofd, const struct osmo_io_ops *ioops
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void osmo_iofd_notify_connected(struct osmo_io_fd *iofd)
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{
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OSMO_ASSERT(iofd->mode == OSMO_IO_FD_MODE_READ_WRITE);
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osmo_iofd_ops.write_enable(iofd);
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OSMO_ASSERT(osmo_iofd_ops.notify_connected);
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osmo_iofd_ops.notify_connected(iofd);
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}
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@ -31,12 +31,14 @@ struct iofd_backend_ops {
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void (*write_disable)(struct osmo_io_fd *iofd);
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void (*read_enable)(struct osmo_io_fd *iofd);
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void (*read_disable)(struct osmo_io_fd *iofd);
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void (*notify_connected)(struct osmo_io_fd *iofd);
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};
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#define IOFD_FLAG_CLOSED (1<<0)
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#define IOFD_FLAG_IN_CALLBACK (1<<1)
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#define IOFD_FLAG_TO_FREE (1<<2)
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#define IOFD_FLAG_NOTIFY_CONNECTED (1<<3)
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#define IOFD_FLAG_FD_REGISTERED (1<<4)
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#define IOFD_FLAG_SET(iofd, flag) \
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(iofd)->flags |= (flag)
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@ -119,20 +119,32 @@ static int iofd_poll_ofd_cb_dispatch(struct osmo_fd *ofd, unsigned int what)
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int iofd_poll_register(struct osmo_io_fd *iofd)
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{
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struct osmo_fd *ofd = &iofd->u.poll.ofd;
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int rc;
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if (IOFD_FLAG_ISSET(iofd, IOFD_FLAG_FD_REGISTERED))
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return 0;
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osmo_fd_setup(ofd, iofd->fd, 0, &iofd_poll_ofd_cb_dispatch, iofd, 0);
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return osmo_fd_register(ofd);
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rc = osmo_fd_register(ofd);
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if (!rc)
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IOFD_FLAG_SET(iofd, IOFD_FLAG_FD_REGISTERED);
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return rc;
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}
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int iofd_poll_unregister(struct osmo_io_fd *iofd)
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{
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struct osmo_fd *ofd = &iofd->u.poll.ofd;
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if (!IOFD_FLAG_ISSET(iofd, IOFD_FLAG_FD_REGISTERED))
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return 0;
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osmo_fd_unregister(ofd);
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IOFD_FLAG_UNSET(iofd, IOFD_FLAG_FD_REGISTERED);
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return 0;
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}
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int iofd_poll_close(struct osmo_io_fd *iofd)
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{
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iofd_poll_unregister(iofd);
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osmo_fd_close(&iofd->u.poll.ofd);
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return 0;
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@ -158,6 +170,16 @@ void iofd_poll_write_disable(struct osmo_io_fd *iofd)
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osmo_fd_write_disable(&iofd->u.poll.ofd);
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}
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void iofd_poll_notify_connected(struct osmo_io_fd *iofd)
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{
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int rc;
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rc = iofd_poll_register(iofd);
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if (rc < 0)
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return;
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osmo_fd_write_enable(&iofd->u.poll.ofd);
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}
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const struct iofd_backend_ops iofd_poll_ops = {
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.register_fd = iofd_poll_register,
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.unregister_fd = iofd_poll_unregister,
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@ -166,6 +188,7 @@ const struct iofd_backend_ops iofd_poll_ops = {
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.write_disable = iofd_poll_write_disable,
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.read_enable = iofd_poll_read_enable,
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.read_disable = iofd_poll_read_disable,
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.notify_connected = iofd_poll_notify_connected,
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};
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#endif /* defined(__linux__) */
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@ -402,6 +402,7 @@ const struct iofd_backend_ops iofd_uring_ops = {
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.write_disable = iofd_uring_write_disable,
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.read_enable = iofd_uring_read_enable,
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.read_disable = iofd_uring_read_disable,
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.notify_connected = iofd_uring_write_enable,
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};
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#endif /* defined(__linux__) */
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