4615998165
Summary: Unlike FreeBSD, CloudABI does not use null terminated strings for its pathnames. Introduce a function called copyin_path() that can be used by all of the filesystem system calls that use pathnames. This change already implements the system calls that don't depend on any additional functionality (e.g., conversion of struct stat). Also implement the socket system calls that operate on pathnames, namely the ones used by the C library functions bindat() and connectat(). These don't receive a 'struct sockaddr_un', but just the pathname, meaning they could be implemented in such a way that they don't depend on the size of sun_path. For now, just use the existing interfaces. Add a missing #include to cloudabi_syscalldefs.h to get this code to build, as one of its macros depends on UINT64_C(). Test Plan: These implementations have already been tested in the CloudABI branch on GitHub. They pass all of the tests. Reviewers: kib, pjd Subscribers: imp Differential Revision: https://reviews.freebsd.org/D3097
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
/*-
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* Copyright (c) 2015 Nuxi, https://nuxi.nl/
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysproto.h>
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#include <sys/systm.h>
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#include <sys/un.h>
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#include <compat/cloudabi/cloudabi_proto.h>
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#include <compat/cloudabi/cloudabi_syscalldefs.h>
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/* Copies a pathname into a UNIX socket address structure. */
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static int
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copyin_sockaddr_un(const char *path, size_t pathlen, struct sockaddr_un *sun)
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{
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int error;
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/* Copy in pathname string if there's enough space. */
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if (pathlen >= sizeof(sun->sun_path))
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return (ENAMETOOLONG);
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error = copyin(path, &sun->sun_path, pathlen);
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if (error != 0)
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return (error);
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if (memchr(sun->sun_path, '\0', pathlen) != NULL)
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return (EINVAL);
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/* Initialize the rest of the socket address. */
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sun->sun_path[pathlen] = '\0';
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sun->sun_family = AF_UNIX;
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sun->sun_len = sizeof(*sun);
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return (0);
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}
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int
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cloudabi_sys_sock_accept(struct thread *td,
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struct cloudabi_sys_sock_accept_args *uap)
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{
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/* Not implemented. */
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return (ENOSYS);
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}
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int
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cloudabi_sys_sock_bind(struct thread *td,
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struct cloudabi_sys_sock_bind_args *uap)
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{
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struct sockaddr_un sun;
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int error;
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error = copyin_sockaddr_un(uap->path, uap->pathlen, &sun);
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if (error != 0)
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return (error);
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return (kern_bindat(td, uap->fd, uap->s, (struct sockaddr *)&sun));
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}
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int
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cloudabi_sys_sock_connect(struct thread *td,
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struct cloudabi_sys_sock_connect_args *uap)
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{
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struct sockaddr_un sun;
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int error;
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error = copyin_sockaddr_un(uap->path, uap->pathlen, &sun);
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if (error != 0)
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return (error);
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return (kern_connectat(td, uap->fd, uap->s, (struct sockaddr *)&sun));
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}
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int
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cloudabi_sys_sock_listen(struct thread *td,
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struct cloudabi_sys_sock_listen_args *uap)
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{
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struct listen_args listen_args = {
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.s = uap->s,
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.backlog = uap->backlog,
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};
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return (sys_listen(td, &listen_args));
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}
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int
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cloudabi_sys_sock_shutdown(struct thread *td,
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struct cloudabi_sys_sock_shutdown_args *uap)
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{
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struct shutdown_args shutdown_args = {
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.s = uap->fd,
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};
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switch (uap->how) {
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case CLOUDABI_SHUT_RD:
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shutdown_args.how = SHUT_RD;
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break;
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case CLOUDABI_SHUT_WR:
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shutdown_args.how = SHUT_WR;
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break;
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case CLOUDABI_SHUT_RD | CLOUDABI_SHUT_WR:
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shutdown_args.how = SHUT_RDWR;
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break;
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default:
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return (EINVAL);
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}
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return (sys_shutdown(td, &shutdown_args));
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}
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int
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cloudabi_sys_sock_stat_get(struct thread *td,
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struct cloudabi_sys_sock_stat_get_args *uap)
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{
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/* Not implemented. */
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return (ENOSYS);
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}
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