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Add socket(2).

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This removes the /dev/net socket interface.

This is an incompatible ABI change.
This commit is contained in:
Jonas 'Sortie' Termansen 2016-06-28 02:07:01 +02:00
parent 50266bb724
commit 4b2cf28bbf
10 changed files with 119 additions and 76 deletions
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1
kernel/Makefile
View file

@ -125,6 +125,7 @@ memorymanagement.o \
mouse/ps2.o \
mtable.o \
net/fs.o \
net/socket.o \
op-new.o \
panic.o \
partition.o \

1
kernel/include/sortix/kernel/syscall.h
View file

@ -158,6 +158,7 @@ int sys_sigaltstack(const stack_t*, stack_t*);
int sys_sigpending(sigset_t*);
int sys_sigprocmask(int, const sigset_t*, sigset_t*);
int sys_sigsuspend(const sigset_t*);
int sys_socket(int, int, int);
int sys_symlinkat(const char*, int, const char*);
int sys_tcdrain(int);
int sys_tcflow(int, int);

3
kernel/include/sortix/syscall.h
View file

@ -185,6 +185,7 @@
#define SYSCALL_SCRAM 162
#define SYSCALL_GETSID 163
#define SYSCALL_SETSID 164
#define SYSCALL_MAX_NUM 165 /* index of highest constant + 1 */
#define SYSCALL_SOCKET 165
#define SYSCALL_MAX_NUM 166 /* index of highest constant + 1 */
#endif

4
kernel/kernel.cpp
View file

@ -581,8 +581,8 @@ static void BootThread(void* /*user*/)
// Initialize the BGA driver.
BGA::Init();
// Initialize the filesystem network-
NetFS::Init("/dev", slashdev);
// Initialize the filesystem network.
NetFS::Init();
//
// Stage 6. Executing Hosted Environment ("User-Space")

38
kernel/net/fs.cpp
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013, 2014 Jonas 'Sortie' Termansen.
* Copyright (c) 2013, 2014, 2016 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -17,8 +17,6 @@
* Filesystem based socket interface.
*/
// TODO: Should this be moved into user-space?
#include <sys/socket.h>
#include <sys/un.h>
@ -550,26 +548,22 @@ Ref<Inode> Manager::open(ioctx_t* /*ctx*/, const char* filename,
return errno = ENOENT, Ref<Inode>(NULL);
}
void Init(const char* devpath, Ref<Descriptor> slashdev)
static Ref<Manager> manager;
void Init()
{
ioctx_t ctx; SetupKernelIOCtx(&ctx);
Ref<Inode> node(new Manager(0, 0, 0666));
if ( !node )
PanicF("Unable to allocate %s/net/fs inode.", devpath);
// TODO: Race condition! Create a mkdir function that returns what it
// created, possibly with a O_MKDIR flag to open.
if ( slashdev->mkdir(&ctx, "net", 0755) < 0 && errno != EEXIST )
PanicF("Could not create a %s/net directory", devpath);
if ( slashdev->mkdir(&ctx, "net/fs", 0755) < 0 && errno != EEXIST )
PanicF("Could not create a %s/net/fs directory", devpath);
Ref<Descriptor> mpoint = slashdev->open(&ctx, "net/fs", O_READ | O_WRITE, 0);
if ( !mpoint )
PanicF("Could not open the %s/net/fs directory", devpath);
Ref<MountTable> mtable = CurrentProcess()->GetMTable();
// TODO: Make sure that the mount point is *empty*! Add a proper function
// for this on the file descriptor class!
if ( !mtable->AddMount(mpoint->ino, mpoint->dev, node, false) )
PanicF("Unable to mount filesystem on %s/net/fs", devpath);
manager = Ref<Manager>(new Manager(0, 0, 0600));
}
Ref<Inode> Socket(int type, int protocol)
{
if ( protocol != 0 )
return errno = EPROTONOSUPPORT, Ref<Inode>(NULL);
switch ( type )
{
case SOCK_STREAM: return Ref<Inode>(new StreamSocket(0, 0, 0600, manager));
default: return errno = EPROTOTYPE, Ref<Inode>(NULL);
}
}
} // namespace NetFS

7
kernel/net/fs.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013 Jonas 'Sortie' Termansen.
* Copyright (c) 2013, 2016 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -20,10 +20,13 @@
#ifndef SORTIX_NET_FS_H
#define SORTIX_NET_FS_H
#include <sortix/kernel/inode.h>
namespace Sortix {
namespace NetFS {
void Init(const char* devpath, Ref<Descriptor> slashdev);
void Init();
Ref<Inode> Socket(int type, int protocol);
} // namespace NetFS
} // namespace Sortix

71
kernel/net/socket.cpp Normal file
View file

@ -0,0 +1,71 @@
/*
* Copyright (c) 2016 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* net/socket.cpp
* Socket system calls.
*/
#include <sys/socket.h>
#include <fcntl.h>
#include <errno.h>
#include <sortix/kernel/descriptor.h>
#include <sortix/kernel/dtable.h>
#include <sortix/kernel/inode.h>
#include <sortix/kernel/process.h>
#include <sortix/kernel/syscall.h>
#include <sortix/kernel/vnode.h>
#include "fs.h"
namespace Sortix {
static Ref<Inode> CreateSocket(int domain, int type, int protocol)
{
switch ( domain )
{
case AF_UNIX: return NetFS::Socket(type, protocol);
default: return errno = EAFNOSUPPORT, Ref<Inode>(NULL);
}
}
int sys_socket(int domain, int type, int protocol)
{
int dflags = O_READ | O_WRITE;
int fdflags = 0;
if ( type & SOCK_NONBLOCK ) dflags |= O_NONBLOCK;
if ( type & SOCK_CLOEXEC ) fdflags |= FD_CLOEXEC;
if ( type & SOCK_CLOFORK ) fdflags |= FD_CLOFORK;
type &= ~(SOCK_NONBLOCK | SOCK_CLOEXEC | SOCK_CLOFORK);
Ref<Inode> inode = CreateSocket(domain, type, protocol);
if ( !inode )
return -1;
Ref<Vnode> vnode(new Vnode(inode, Ref<Vnode>(NULL), 0, 0));
if ( !vnode )
return -1;
inode.Reset();
Ref<Descriptor> desc(new Descriptor(vnode, dflags));
if ( !desc )
return -1;
vnode.Reset();
Process* process = CurrentProcess();
Ref<DescriptorTable> dtable = process->GetDTable();
return dtable->Allocate(desc, fdflags);
}
} // namespace Sortix

1
kernel/syscall.cpp
View file

@ -199,6 +199,7 @@ void* syscall_list[SYSCALL_MAX_NUM + 1] =
[SYSCALL_SCRAM] = (void*) sys_scram,
[SYSCALL_GETSID] = (void*) sys_getsid,
[SYSCALL_SETSID] = (void*) sys_setsid,
[SYSCALL_SOCKET] = (void*) sys_socket,
[SYSCALL_MAX_NUM] = (void*) sys_bad_syscall,
};
} /* extern "C" */

54
libc/sys/socket/socket.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013 Jonas 'Sortie' Termansen.
* Copyright (c) 2013, 2016 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
@ -14,59 +14,15 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* sys/socket/socket.c
* Creates a new unconnected socket.
* Create a socket.
*/
#include <sys/socket.h>
#include <sys/syscall.h>
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
static const char* get_socket_factory(int domain, int type, int protocol)
{
if ( domain == AF_INET )
{
if ( type == SOCK_DGRAM && !protocol )
return "/dev/net/ipv4/udp";
if ( type == SOCK_STREAM && !protocol )
return "/dev/net/ipv4/tcp";
return errno = EPROTONOSUPPORT, (const char*) NULL;
}
if ( domain == AF_INET6 )
{
if ( type == SOCK_DGRAM && !protocol )
return "/dev/net/ipv6/udp";
if ( type == SOCK_STREAM && !protocol )
return "/dev/net/ipv6/tcp";
return errno = EPROTONOSUPPORT, (const char*) NULL;
}
if ( domain == AF_UNIX )
{
if ( type == SOCK_DGRAM && !protocol )
return "/dev/net/fs/datagram";
if ( type == SOCK_STREAM && !protocol )
return "/dev/net/fs/stream";
return errno = EPROTONOSUPPORT, (const char*) NULL;
}
return errno = EAFNOSUPPORT, (const char*) NULL;
}
DEFN_SYSCALL3(int, sys_socket, SYSCALL_SOCKET, int, int, int);
int socket(int domain, int type, int protocol)
{
int open_flags = O_RDWR;
if ( type & SOCK_NONBLOCK ) open_flags |= O_NONBLOCK;
if ( type & SOCK_CLOEXEC ) open_flags |= O_CLOEXEC;
if ( type & SOCK_CLOFORK ) open_flags |= O_CLOFORK;
type &= SOCK_TYPE_MASK;
const char* factory = get_socket_factory(domain, type, protocol);
if ( !factory )
return -1;
int ret = open(factory, open_flags);
if ( ret < 0 && errno == ENOENT )
errno = EPROTONOSUPPORT;
return ret;
return sys_socket(domain, type, protocol);
}

15
share/man/man7/following-development.7
View file

@ -59,6 +59,21 @@ releasing Sortix x.y, foo." to allow the maintainer to easily
.Xr grep 1
for it after a release.
.Sh CHANGES
.Ss Add socket(2)
The
.Pa /dev/net
virtual filesystem for socket creation has been removed in favor of adding an
actual
.Xr socket 2
system call.
This is a major incompatible ABI change.
Only Unix sockets were exposed this way.
In the base system,
.Xr sf 1
is the only program with Unix socket capabilities.
Ports using Unix sockets must be updated.
Otherwise the system is compatible except accessing Unix sockets fails with
.Er ENOENT .
.Ss Add split packages and cross-bootstrapping support to tix-build(8)
.Xr tix-build 8
has gained a number of features that will soon be required in order to build