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freebsd/sys/kern/sys_socket.c

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BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
*/
Use __FBSDID().
2003-06-11 00:56:59 +00:00
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
Integrate mac_check_socket_send() and mac_check_socket_receive() checks from the MAC tree: allow policies to perform access control for the ability of a process to send and receive data via a socket. At some point, we might also pass in additional address information if an explicit address is requested on send. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-06 14:39:15 +00:00
#include "opt_mac.h"
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/file.h>
When compiling the kernel do not implicitly include filedesc.h from proc.h, this was causing filedesc work to be very painful. In order to make this work split out sigio definitions to thier own header (sigio.h) which is included from proc.h for the time being.
2003-01-01 01:56:19 +00:00
#include <sys/filedesc.h>
Integrate mac_check_socket_send() and mac_check_socket_receive() checks from the MAC tree: allow policies to perform access control for the ability of a process to send and receive data via a socket. At some point, we might also pass in additional address information if an explicit address is requested on send. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-06 14:39:15 +00:00
#include <sys/mac.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/protosw.h>
When compiling the kernel do not implicitly include filedesc.h from proc.h, this was causing filedesc work to be very painful. In order to make this work split out sigio definitions to thier own header (sigio.h) which is included from proc.h for the time being.
2003-01-01 01:56:19 +00:00
#include <sys/sigio.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/socket.h>
#include <sys/socketvar.h>
Don't include <sys/ioctl.h> in the kernel. Stage 4: include <sys/ttycom.h> and sometimes <sys/filio.h> instead of <sys/ioctl.h> in miscellaneous files. Most of these files have nothing to do with ttys but need to include <sys/ttycom.h> to get the definitions of TIOC[SG]PGRP which are (ab)used to convert F[SG]ETOWN fcntls into ioctls.
1997-03-24 11:52:29 +00:00
#include <sys/filio.h> /* XXX */
#include <sys/sockio.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <sys/stat.h>
Moved some #includes from <sys/param.h> nearer to where they are actually used.
1998-03-28 10:33:27 +00:00
#include <sys/uio.h>
Include the UID and GID values filled in by socreate() into socket->so_cred for stat() calls. Reviewed by: phk
2000-05-11 22:08:57 +00:00
#include <sys/ucred.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
#include <net/if.h>
#include <net/route.h>
Extend kqueue down to the device layer. Backwards compatible approach suggested by: peter
2001-02-15 16:34:11 +00:00
struct fileops socketops = {
Initialize struct fileops with C99 sparse initialization.
2003-06-18 18:16:40 +00:00
.fo_read = soo_read,
.fo_write = soo_write,
.fo_ioctl = soo_ioctl,
.fo_poll = soo_poll,
.fo_kqfilter = soo_kqfilter,
.fo_stat = soo_stat,
.fo_close = soo_close,
.fo_flags = DFLAG_PASSABLE
Extend kqueue down to the device layer. Backwards compatible approach suggested by: peter
2001-02-15 16:34:11 +00:00
};
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
Unstaticized routines which are needed by the svr4 KLD and the streams garbage needed to support SysVR4 networking.
1999-01-30 06:25:00 +00:00
int
In order to better support flexible and extensible access control, make a series of modifications to the credential arguments relating to file read and write operations to cliarfy which credential is used for what: - Change fo_read() and fo_write() to accept "active_cred" instead of "cred", and change the semantics of consumers of fo_read() and fo_write() to pass the active credential of the thread requesting an operation rather than the cached file cred. The cached file cred is still available in fo_read() and fo_write() consumers via fp->f_cred. These changes largely in sys_generic.c. For each implementation of fo_read() and fo_write(), update cred usage to reflect this change and maintain current semantics: - badfo_readwrite() unchanged - kqueue_read/write() unchanged pipe_read/write() now authorize MAC using active_cred rather than td->td_ucred - soo_read/write() unchanged - vn_read/write() now authorize MAC using active_cred but VOP_READ/WRITE() with fp->f_cred Modify vn_rdwr() to accept two credential arguments instead of a single credential: active_cred and file_cred. Use active_cred for MAC authorization, and select a credential for use in VOP_READ/WRITE() based on whether file_cred is NULL or not. If file_cred is provided, authorize the VOP using that cred, otherwise the active credential, matching current semantics. Modify current vn_rdwr() consumers to pass a file_cred if used in the context of a struct file, and to always pass active_cred. When vn_rdwr() is used without a file_cred, pass NOCRED. These changes should maintain current semantics for read/write, but avoid a redundant passing of fp->f_cred, as well as making it more clear what the origin of each credential is in file descriptor read/write operations. Follow-up commits will make similar changes to other file descriptor operations, and modify the MAC framework to pass both credentials to MAC policy modules so they can implement either semantic for revocation. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-15 20:55:08 +00:00
soo_read(fp, uio, active_cred, flags, td)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct file *fp;
struct uio *uio;
In order to better support flexible and extensible access control, make a series of modifications to the credential arguments relating to file read and write operations to cliarfy which credential is used for what: - Change fo_read() and fo_write() to accept "active_cred" instead of "cred", and change the semantics of consumers of fo_read() and fo_write() to pass the active credential of the thread requesting an operation rather than the cached file cred. The cached file cred is still available in fo_read() and fo_write() consumers via fp->f_cred. These changes largely in sys_generic.c. For each implementation of fo_read() and fo_write(), update cred usage to reflect this change and maintain current semantics: - badfo_readwrite() unchanged - kqueue_read/write() unchanged pipe_read/write() now authorize MAC using active_cred rather than td->td_ucred - soo_read/write() unchanged - vn_read/write() now authorize MAC using active_cred but VOP_READ/WRITE() with fp->f_cred Modify vn_rdwr() to accept two credential arguments instead of a single credential: active_cred and file_cred. Use active_cred for MAC authorization, and select a credential for use in VOP_READ/WRITE() based on whether file_cred is NULL or not. If file_cred is provided, authorize the VOP using that cred, otherwise the active credential, matching current semantics. Modify current vn_rdwr() consumers to pass a file_cred if used in the context of a struct file, and to always pass active_cred. When vn_rdwr() is used without a file_cred, pass NOCRED. These changes should maintain current semantics for read/write, but avoid a redundant passing of fp->f_cred, as well as making it more clear what the origin of each credential is in file descriptor read/write operations. Follow-up commits will make similar changes to other file descriptor operations, and modify the MAC framework to pass both credentials to MAC policy modules so they can implement either semantic for revocation. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-15 20:55:08 +00:00
struct ucred *active_cred;
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
struct thread *td;
Add standard padding argument to pread and pwrite syscall. That should make them NetBSD compatible. Add parameter to fo_read and fo_write. (The only flag FOF_OFFSET mean that the offset is set in the struct uio). Factor out some common code from read/pread/write/pwrite syscalls.
1999-04-04 21:41:28 +00:00
int flags;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Bow to the whining masses and change a union back into void *. Retain removal of unnecessary casts and throw in some minor cleanups to see if anyone complains, just for the hell of it.
2003-01-13 00:33:17 +00:00
struct socket *so = fp->f_data;
Giant pushdown for read/write/pread/pwrite syscalls. kern/kern_descrip.c: Aquire Giant in fdrop_locked when file refcount hits zero, this removes the requirement for the caller to own Giant for the most part. kern/kern_ktrace.c: Aquire Giant in ktrgenio, simplifies locking in upper read/write syscalls. kern/vfs_bio.c: Aquire Giant in bwillwrite if needed. kern/sys_generic.c Giant pushdown, remove Giant for: read, pread, write and pwrite. readv and writev aren't done yet because of the possible malloc calls for iov to uio processing. kern/sys_socket.c Grab giant in the socket fo_read/write functions. kern/vfs_vnops.c Grab giant in the vnode fo_read/write functions.
2002-03-15 08:03:46 +00:00
int error;
Conditionally acquire Giant when entering the socket layer via file descriptor operations based on debug.mpsafenet, rather than acquiring Giant unconditionally.
2004-03-29 01:55:32 +00:00
NET_LOCK_GIANT();
Integrate mac_check_socket_send() and mac_check_socket_receive() checks from the MAC tree: allow policies to perform access control for the ability of a process to send and receive data via a socket. At some point, we might also pass in additional address information if an explicit address is requested on send. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-06 14:39:15 +00:00
#ifdef MAC
error = mac_check_socket_receive(active_cred, so);
if (error) {
Conditionally acquire Giant when entering the socket layer via file descriptor operations based on debug.mpsafenet, rather than acquiring Giant unconditionally.
2004-03-29 01:55:32 +00:00
NET_UNLOCK_GIANT();
Integrate mac_check_socket_send() and mac_check_socket_receive() checks from the MAC tree: allow policies to perform access control for the ability of a process to send and receive data via a socket. At some point, we might also pass in additional address information if an explicit address is requested on send. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-06 14:39:15 +00:00
return (error);
}
#endif
Giant pushdown for read/write/pread/pwrite syscalls. kern/kern_descrip.c: Aquire Giant in fdrop_locked when file refcount hits zero, this removes the requirement for the caller to own Giant for the most part. kern/kern_ktrace.c: Aquire Giant in ktrgenio, simplifies locking in upper read/write syscalls. kern/vfs_bio.c: Aquire Giant in bwillwrite if needed. kern/sys_generic.c Giant pushdown, remove Giant for: read, pread, write and pwrite. readv and writev aren't done yet because of the possible malloc calls for iov to uio processing. kern/sys_socket.c Grab giant in the socket fo_read/write functions. kern/vfs_vnops.c Grab giant in the vnode fo_read/write functions.
2002-03-15 08:03:46 +00:00
error = so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0);
Conditionally acquire Giant when entering the socket layer via file descriptor operations based on debug.mpsafenet, rather than acquiring Giant unconditionally.
2004-03-29 01:55:32 +00:00
NET_UNLOCK_GIANT();
Giant pushdown for read/write/pread/pwrite syscalls. kern/kern_descrip.c: Aquire Giant in fdrop_locked when file refcount hits zero, this removes the requirement for the caller to own Giant for the most part. kern/kern_ktrace.c: Aquire Giant in ktrgenio, simplifies locking in upper read/write syscalls. kern/vfs_bio.c: Aquire Giant in bwillwrite if needed. kern/sys_generic.c Giant pushdown, remove Giant for: read, pread, write and pwrite. readv and writev aren't done yet because of the possible malloc calls for iov to uio processing. kern/sys_socket.c Grab giant in the socket fo_read/write functions. kern/vfs_vnops.c Grab giant in the vnode fo_read/write functions.
2002-03-15 08:03:46 +00:00
return (error);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
/* ARGSUSED */
Unstaticized routines which are needed by the svr4 KLD and the streams garbage needed to support SysVR4 networking.
1999-01-30 06:25:00 +00:00
int
In order to better support flexible and extensible access control, make a series of modifications to the credential arguments relating to file read and write operations to cliarfy which credential is used for what: - Change fo_read() and fo_write() to accept "active_cred" instead of "cred", and change the semantics of consumers of fo_read() and fo_write() to pass the active credential of the thread requesting an operation rather than the cached file cred. The cached file cred is still available in fo_read() and fo_write() consumers via fp->f_cred. These changes largely in sys_generic.c. For each implementation of fo_read() and fo_write(), update cred usage to reflect this change and maintain current semantics: - badfo_readwrite() unchanged - kqueue_read/write() unchanged pipe_read/write() now authorize MAC using active_cred rather than td->td_ucred - soo_read/write() unchanged - vn_read/write() now authorize MAC using active_cred but VOP_READ/WRITE() with fp->f_cred Modify vn_rdwr() to accept two credential arguments instead of a single credential: active_cred and file_cred. Use active_cred for MAC authorization, and select a credential for use in VOP_READ/WRITE() based on whether file_cred is NULL or not. If file_cred is provided, authorize the VOP using that cred, otherwise the active credential, matching current semantics. Modify current vn_rdwr() consumers to pass a file_cred if used in the context of a struct file, and to always pass active_cred. When vn_rdwr() is used without a file_cred, pass NOCRED. These changes should maintain current semantics for read/write, but avoid a redundant passing of fp->f_cred, as well as making it more clear what the origin of each credential is in file descriptor read/write operations. Follow-up commits will make similar changes to other file descriptor operations, and modify the MAC framework to pass both credentials to MAC policy modules so they can implement either semantic for revocation. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-15 20:55:08 +00:00
soo_write(fp, uio, active_cred, flags, td)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct file *fp;
struct uio *uio;
In order to better support flexible and extensible access control, make a series of modifications to the credential arguments relating to file read and write operations to cliarfy which credential is used for what: - Change fo_read() and fo_write() to accept "active_cred" instead of "cred", and change the semantics of consumers of fo_read() and fo_write() to pass the active credential of the thread requesting an operation rather than the cached file cred. The cached file cred is still available in fo_read() and fo_write() consumers via fp->f_cred. These changes largely in sys_generic.c. For each implementation of fo_read() and fo_write(), update cred usage to reflect this change and maintain current semantics: - badfo_readwrite() unchanged - kqueue_read/write() unchanged pipe_read/write() now authorize MAC using active_cred rather than td->td_ucred - soo_read/write() unchanged - vn_read/write() now authorize MAC using active_cred but VOP_READ/WRITE() with fp->f_cred Modify vn_rdwr() to accept two credential arguments instead of a single credential: active_cred and file_cred. Use active_cred for MAC authorization, and select a credential for use in VOP_READ/WRITE() based on whether file_cred is NULL or not. If file_cred is provided, authorize the VOP using that cred, otherwise the active credential, matching current semantics. Modify current vn_rdwr() consumers to pass a file_cred if used in the context of a struct file, and to always pass active_cred. When vn_rdwr() is used without a file_cred, pass NOCRED. These changes should maintain current semantics for read/write, but avoid a redundant passing of fp->f_cred, as well as making it more clear what the origin of each credential is in file descriptor read/write operations. Follow-up commits will make similar changes to other file descriptor operations, and modify the MAC framework to pass both credentials to MAC policy modules so they can implement either semantic for revocation. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-15 20:55:08 +00:00
struct ucred *active_cred;
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
struct thread *td;
Add standard padding argument to pread and pwrite syscall. That should make them NetBSD compatible. Add parameter to fo_read and fo_write. (The only flag FOF_OFFSET mean that the offset is set in the struct uio). Factor out some common code from read/pread/write/pwrite syscalls.
1999-04-04 21:41:28 +00:00
int flags;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Bow to the whining masses and change a union back into void *. Retain removal of unnecessary casts and throw in some minor cleanups to see if anyone complains, just for the hell of it.
2003-01-13 00:33:17 +00:00
struct socket *so = fp->f_data;
Giant pushdown for read/write/pread/pwrite syscalls. kern/kern_descrip.c: Aquire Giant in fdrop_locked when file refcount hits zero, this removes the requirement for the caller to own Giant for the most part. kern/kern_ktrace.c: Aquire Giant in ktrgenio, simplifies locking in upper read/write syscalls. kern/vfs_bio.c: Aquire Giant in bwillwrite if needed. kern/sys_generic.c Giant pushdown, remove Giant for: read, pread, write and pwrite. readv and writev aren't done yet because of the possible malloc calls for iov to uio processing. kern/sys_socket.c Grab giant in the socket fo_read/write functions. kern/vfs_vnops.c Grab giant in the vnode fo_read/write functions.
2002-03-15 08:03:46 +00:00
int error;
Conditionally acquire Giant when entering the socket layer via file descriptor operations based on debug.mpsafenet, rather than acquiring Giant unconditionally.
2004-03-29 01:55:32 +00:00
NET_LOCK_GIANT();
Integrate mac_check_socket_send() and mac_check_socket_receive() checks from the MAC tree: allow policies to perform access control for the ability of a process to send and receive data via a socket. At some point, we might also pass in additional address information if an explicit address is requested on send. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-06 14:39:15 +00:00
#ifdef MAC
error = mac_check_socket_send(active_cred, so);
if (error) {
Conditionally acquire Giant when entering the socket layer via file descriptor operations based on debug.mpsafenet, rather than acquiring Giant unconditionally.
2004-03-29 01:55:32 +00:00
NET_UNLOCK_GIANT();
Integrate mac_check_socket_send() and mac_check_socket_receive() checks from the MAC tree: allow policies to perform access control for the ability of a process to send and receive data via a socket. At some point, we might also pass in additional address information if an explicit address is requested on send. Obtained from: TrustedBSD Project Sponsored by: DARPA, Network Associates Laboratories
2002-10-06 14:39:15 +00:00
return (error);
}
#endif
Giant pushdown for read/write/pread/pwrite syscalls. kern/kern_descrip.c: Aquire Giant in fdrop_locked when file refcount hits zero, this removes the requirement for the caller to own Giant for the most part. kern/kern_ktrace.c: Aquire Giant in ktrgenio, simplifies locking in upper read/write syscalls. kern/vfs_bio.c: Aquire Giant in bwillwrite if needed. kern/sys_generic.c Giant pushdown, remove Giant for: read, pread, write and pwrite. readv and writev aren't done yet because of the possible malloc calls for iov to uio processing. kern/sys_socket.c Grab giant in the socket fo_read/write functions. kern/vfs_vnops.c Grab giant in the vnode fo_read/write functions.
2002-03-15 08:03:46 +00:00
error = so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0,
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
uio->uio_td);
Conditionally acquire Giant when entering the socket layer via file descriptor operations based on debug.mpsafenet, rather than acquiring Giant unconditionally.
2004-03-29 01:55:32 +00:00
NET_UNLOCK_GIANT();
Giant pushdown for read/write/pread/pwrite syscalls. kern/kern_descrip.c: Aquire Giant in fdrop_locked when file refcount hits zero, this removes the requirement for the caller to own Giant for the most part. kern/kern_ktrace.c: Aquire Giant in ktrgenio, simplifies locking in upper read/write syscalls. kern/vfs_bio.c: Aquire Giant in bwillwrite if needed. kern/sys_generic.c Giant pushdown, remove Giant for: read, pread, write and pwrite. readv and writev aren't done yet because of the possible malloc calls for iov to uio processing. kern/sys_socket.c Grab giant in the socket fo_read/write functions. kern/vfs_vnops.c Grab giant in the vnode fo_read/write functions.
2002-03-15 08:03:46 +00:00
return (error);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
int
In continuation of early fileop credential changes, modify fo_ioctl() to accept an 'active_cred' argument reflecting the credential of the thread initiating the ioctl operation. - Change fo_ioctl() to accept active_cred; change consumers of the fo_ioctl() interface to generally pass active_cred from td->td_ucred. - In fifofs, initialize filetmp.f_cred to ap->a_cred so that the invocations of soo_ioctl() are provided access to the calling f_cred. Pass ap->a_td->td_ucred as the active_cred, but note that this is required because we don't yet distinguish file_cred and active_cred in invoking VOP's. - Update kqueue_ioctl() for its new argument. - Update pipe_ioctl() for its new argument, pass active_cred rather than td_ucred to MAC for authorization. - Update soo_ioctl() for its new argument. - Update vn_ioctl() for its new argument, use active_cred rather than td->td_ucred to authorize VOP_IOCTL() and the associated VOP_GETATTR(). Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-17 02:36:16 +00:00
soo_ioctl(fp, cmd, data, active_cred, td)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct file *fp;
This commit fixes various 64bit portability problems required for FreeBSD/alpha. The most significant item is to change the command argument to ioctl functions from int to u_long. This change brings us inline with various other BSD versions. Driver writers may like to use (__FreeBSD_version == 300003) to detect this change. The prototype FreeBSD/alpha machdep will follow in a couple of days time.
1998-06-07 17:13:14 +00:00
u_long cmd;
More caddr_t removal, make fo_ioctl take a void * instead of a caddr_t.
2002-06-29 01:50:25 +00:00
void *data;
In continuation of early fileop credential changes, modify fo_ioctl() to accept an 'active_cred' argument reflecting the credential of the thread initiating the ioctl operation. - Change fo_ioctl() to accept active_cred; change consumers of the fo_ioctl() interface to generally pass active_cred from td->td_ucred. - In fifofs, initialize filetmp.f_cred to ap->a_cred so that the invocations of soo_ioctl() are provided access to the calling f_cred. Pass ap->a_td->td_ucred as the active_cred, but note that this is required because we don't yet distinguish file_cred and active_cred in invoking VOP's. - Update kqueue_ioctl() for its new argument. - Update pipe_ioctl() for its new argument, pass active_cred rather than td_ucred to MAC for authorization. - Update soo_ioctl() for its new argument. - Update vn_ioctl() for its new argument, use active_cred rather than td->td_ucred to authorize VOP_IOCTL() and the associated VOP_GETATTR(). Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-17 02:36:16 +00:00
struct ucred *active_cred;
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
struct thread *td;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Bow to the whining masses and change a union back into void *. Retain removal of unnecessary casts and throw in some minor cleanups to see if anyone complains, just for the hell of it.
2003-01-13 00:33:17 +00:00
register struct socket *so = fp->f_data;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
switch (cmd) {
case FIONBIO:
if (*(int *)data)
so->so_state |= SS_NBIO;
else
so->so_state &= ~SS_NBIO;
return (0);
case FIOASYNC:
if (*(int *)data) {
so->so_state |= SS_ASYNC;
so->so_rcv.sb_flags |= SB_ASYNC;
so->so_snd.sb_flags |= SB_ASYNC;
} else {
so->so_state &= ~SS_ASYNC;
so->so_rcv.sb_flags &= ~SB_ASYNC;
so->so_snd.sb_flags &= ~SB_ASYNC;
}
return (0);
case FIONREAD:
*(int *)data = so->so_rcv.sb_cc;
return (0);
Installed the second patch attached to kern/7899 with some changes suggested by bde, a few other tweaks to get the patch to apply cleanly again and some improvements to the comments. This change closes some fairly minor security holes associated with F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN had on tty devices. For more details, see the description on the PR. Because this patch increases the size of the proc and pgrp structures, it is necessary to re-install the includes and recompile libkvm, the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w. PR: kern/7899 Reviewed by: bde, elvind
1998-11-11 10:04:13 +00:00
case FIOSETOWN:
return (fsetown(*(int *)data, &so->so_sigio));
case FIOGETOWN:
In an SMP environment post-Giant it is no longer safe to blindly dereference the struct sigio pointer without any locking. Change fgetown() to take a reference to the pointer instead of a copy of the pointer and call SIGIO_LOCK() before copying the pointer and dereferencing it. Reviewed by: rwatson
2002-10-03 02:13:00 +00:00
*(int *)data = fgetown(&so->so_sigio);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return (0);
Installed the second patch attached to kern/7899 with some changes suggested by bde, a few other tweaks to get the patch to apply cleanly again and some improvements to the comments. This change closes some fairly minor security holes associated with F_SETOWN, fixes a few bugs, and removes some limitations that F_SETOWN had on tty devices. For more details, see the description on the PR. Because this patch increases the size of the proc and pgrp structures, it is necessary to re-install the includes and recompile libkvm, the vinum lkm, fstat, gcore, gdb, ipfilter, ps, top, and w. PR: kern/7899 Reviewed by: bde, elvind
1998-11-11 10:04:13 +00:00
case SIOCSPGRP:
return (fsetown(-(*(int *)data), &so->so_sigio));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
case SIOCGPGRP:
In an SMP environment post-Giant it is no longer safe to blindly dereference the struct sigio pointer without any locking. Change fgetown() to take a reference to the pointer instead of a copy of the pointer and call SIGIO_LOCK() before copying the pointer and dereferencing it. Reviewed by: rwatson
2002-10-03 02:13:00 +00:00
*(int *)data = -fgetown(&so->so_sigio);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return (0);
case SIOCATMARK:
*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
return (0);
}
/*
* Interface/routing/protocol specific ioctls:
* interface and routing ioctls should have a
* different entry since a socket's unnecessary
*/
if (IOCGROUP(cmd) == 'i')
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
return (ifioctl(so, cmd, data, td));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (IOCGROUP(cmd) == 'r')
Don't bother passing p to rtioctl just so it can fail to pass it to mrt_ioctl
2001-07-25 20:15:28 +00:00
return (rtioctl(cmd, data));
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, td));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
int
Make similar changes to fo_stat() and fo_poll() as made earlier to fo_read() and fo_write(): explicitly use the cred argument to fo_poll() as "active_cred" using the passed file descriptor's f_cred reference to provide access to the file credential. Add an active_cred argument to fo_stat() so that implementers have access to the active credential as well as the file credential. Generally modify callers of fo_stat() to pass in td->td_ucred rather than fp->f_cred, which was redundantly provided via the fp argument. This set of modifications also permits threads to perform these operations on behalf of another thread without modifying their credential. Trickle this change down into fo_stat/poll() implementations: - badfo_poll(), badfo_stat(): modify/add arguments. - kqueue_poll(), kqueue_stat(): modify arguments. - pipe_poll(), pipe_stat(): modify/add arguments, pass active_cred to MAC checks rather than td->td_ucred. - soo_poll(), soo_stat(): modify/add arguments, pass fp->f_cred rather than cred to pru_sopoll() to maintain current semantics. - sopoll(): moidfy arguments. - vn_poll(), vn_statfile(): modify/add arguments, pass new arguments to vn_stat(). Pass active_cred to MAC and fp->f_cred to VOP_POLL() to maintian current semantics. - vn_close(): rename cred to file_cred to reflect reality while I'm here. - vn_stat(): Add active_cred and file_cred arguments to vn_stat() and consumers so that this distinction is maintained at the VFS as well as 'struct file' layer. Pass active_cred instead of td->td_ucred to MAC and to VOP_GETATTR() to maintain current semantics. - fifofs: modify the creation of a "filetemp" so that the file credential is properly initialized and can be used in the socket code if desired. Pass ap->a_td->td_ucred as the active credential to soo_poll(). If we teach the vnop interface about the distinction between file and active credentials, we would use the active credential here. Note that current inconsistent passing of active_cred vs. file_cred to VOP's is maintained. It's not clear why GETATTR would be authorized using active_cred while POLL would be authorized using file_cred at the file system level. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-16 12:52:03 +00:00
soo_poll(fp, events, active_cred, td)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct file *fp;
Various select -> poll changes
1997-09-14 02:52:18 +00:00
int events;
Make similar changes to fo_stat() and fo_poll() as made earlier to fo_read() and fo_write(): explicitly use the cred argument to fo_poll() as "active_cred" using the passed file descriptor's f_cred reference to provide access to the file credential. Add an active_cred argument to fo_stat() so that implementers have access to the active credential as well as the file credential. Generally modify callers of fo_stat() to pass in td->td_ucred rather than fp->f_cred, which was redundantly provided via the fp argument. This set of modifications also permits threads to perform these operations on behalf of another thread without modifying their credential. Trickle this change down into fo_stat/poll() implementations: - badfo_poll(), badfo_stat(): modify/add arguments. - kqueue_poll(), kqueue_stat(): modify arguments. - pipe_poll(), pipe_stat(): modify/add arguments, pass active_cred to MAC checks rather than td->td_ucred. - soo_poll(), soo_stat(): modify/add arguments, pass fp->f_cred rather than cred to pru_sopoll() to maintain current semantics. - sopoll(): moidfy arguments. - vn_poll(), vn_statfile(): modify/add arguments, pass new arguments to vn_stat(). Pass active_cred to MAC and fp->f_cred to VOP_POLL() to maintian current semantics. - vn_close(): rename cred to file_cred to reflect reality while I'm here. - vn_stat(): Add active_cred and file_cred arguments to vn_stat() and consumers so that this distinction is maintained at the VFS as well as 'struct file' layer. Pass active_cred instead of td->td_ucred to MAC and to VOP_GETATTR() to maintain current semantics. - fifofs: modify the creation of a "filetemp" so that the file credential is properly initialized and can be used in the socket code if desired. Pass ap->a_td->td_ucred as the active credential to soo_poll(). If we teach the vnop interface about the distinction between file and active credentials, we would use the active credential here. Note that current inconsistent passing of active_cred vs. file_cred to VOP's is maintained. It's not clear why GETATTR would be authorized using active_cred while POLL would be authorized using file_cred at the file system level. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-16 12:52:03 +00:00
struct ucred *active_cred;
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
struct thread *td;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Bow to the whining masses and change a union back into void *. Retain removal of unnecessary casts and throw in some minor cleanups to see if anyone complains, just for the hell of it.
2003-01-13 00:33:17 +00:00
struct socket *so = fp->f_data;
Make similar changes to fo_stat() and fo_poll() as made earlier to fo_read() and fo_write(): explicitly use the cred argument to fo_poll() as "active_cred" using the passed file descriptor's f_cred reference to provide access to the file credential. Add an active_cred argument to fo_stat() so that implementers have access to the active credential as well as the file credential. Generally modify callers of fo_stat() to pass in td->td_ucred rather than fp->f_cred, which was redundantly provided via the fp argument. This set of modifications also permits threads to perform these operations on behalf of another thread without modifying their credential. Trickle this change down into fo_stat/poll() implementations: - badfo_poll(), badfo_stat(): modify/add arguments. - kqueue_poll(), kqueue_stat(): modify arguments. - pipe_poll(), pipe_stat(): modify/add arguments, pass active_cred to MAC checks rather than td->td_ucred. - soo_poll(), soo_stat(): modify/add arguments, pass fp->f_cred rather than cred to pru_sopoll() to maintain current semantics. - sopoll(): moidfy arguments. - vn_poll(), vn_statfile(): modify/add arguments, pass new arguments to vn_stat(). Pass active_cred to MAC and fp->f_cred to VOP_POLL() to maintian current semantics. - vn_close(): rename cred to file_cred to reflect reality while I'm here. - vn_stat(): Add active_cred and file_cred arguments to vn_stat() and consumers so that this distinction is maintained at the VFS as well as 'struct file' layer. Pass active_cred instead of td->td_ucred to MAC and to VOP_GETATTR() to maintain current semantics. - fifofs: modify the creation of a "filetemp" so that the file credential is properly initialized and can be used in the socket code if desired. Pass ap->a_td->td_ucred as the active credential to soo_poll(). If we teach the vnop interface about the distinction between file and active credentials, we would use the active credential here. Note that current inconsistent passing of active_cred vs. file_cred to VOP's is maintained. It's not clear why GETATTR would be authorized using active_cred while POLL would be authorized using file_cred at the file system level. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-16 12:52:03 +00:00
return so->so_proto->pr_usrreqs->pru_sopoll(so, events,
fp->f_cred, td);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
The big 4.4BSD Lite to FreeBSD 2.0.0 (Development) patch. Reviewed by: Rodney W. Grimes Submitted by: John Dyson and David Greenman
1994-05-25 09:21:21 +00:00
int
Make similar changes to fo_stat() and fo_poll() as made earlier to fo_read() and fo_write(): explicitly use the cred argument to fo_poll() as "active_cred" using the passed file descriptor's f_cred reference to provide access to the file credential. Add an active_cred argument to fo_stat() so that implementers have access to the active credential as well as the file credential. Generally modify callers of fo_stat() to pass in td->td_ucred rather than fp->f_cred, which was redundantly provided via the fp argument. This set of modifications also permits threads to perform these operations on behalf of another thread without modifying their credential. Trickle this change down into fo_stat/poll() implementations: - badfo_poll(), badfo_stat(): modify/add arguments. - kqueue_poll(), kqueue_stat(): modify arguments. - pipe_poll(), pipe_stat(): modify/add arguments, pass active_cred to MAC checks rather than td->td_ucred. - soo_poll(), soo_stat(): modify/add arguments, pass fp->f_cred rather than cred to pru_sopoll() to maintain current semantics. - sopoll(): moidfy arguments. - vn_poll(), vn_statfile(): modify/add arguments, pass new arguments to vn_stat(). Pass active_cred to MAC and fp->f_cred to VOP_POLL() to maintian current semantics. - vn_close(): rename cred to file_cred to reflect reality while I'm here. - vn_stat(): Add active_cred and file_cred arguments to vn_stat() and consumers so that this distinction is maintained at the VFS as well as 'struct file' layer. Pass active_cred instead of td->td_ucred to MAC and to VOP_GETATTR() to maintain current semantics. - fifofs: modify the creation of a "filetemp" so that the file credential is properly initialized and can be used in the socket code if desired. Pass ap->a_td->td_ucred as the active credential to soo_poll(). If we teach the vnop interface about the distinction between file and active credentials, we would use the active credential here. Note that current inconsistent passing of active_cred vs. file_cred to VOP's is maintained. It's not clear why GETATTR would be authorized using active_cred while POLL would be authorized using file_cred at the file system level. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-16 12:52:03 +00:00
soo_stat(fp, ub, active_cred, td)
Update socket file type for fo_stat(). soo_stat() becomes a fileops switch entry point rather than being used externally with knowledge of the internals of the DTYPE_SOCKET f_data contents.
1999-11-08 03:31:01 +00:00
struct file *fp;
struct stat *ub;
Make similar changes to fo_stat() and fo_poll() as made earlier to fo_read() and fo_write(): explicitly use the cred argument to fo_poll() as "active_cred" using the passed file descriptor's f_cred reference to provide access to the file credential. Add an active_cred argument to fo_stat() so that implementers have access to the active credential as well as the file credential. Generally modify callers of fo_stat() to pass in td->td_ucred rather than fp->f_cred, which was redundantly provided via the fp argument. This set of modifications also permits threads to perform these operations on behalf of another thread without modifying their credential. Trickle this change down into fo_stat/poll() implementations: - badfo_poll(), badfo_stat(): modify/add arguments. - kqueue_poll(), kqueue_stat(): modify arguments. - pipe_poll(), pipe_stat(): modify/add arguments, pass active_cred to MAC checks rather than td->td_ucred. - soo_poll(), soo_stat(): modify/add arguments, pass fp->f_cred rather than cred to pru_sopoll() to maintain current semantics. - sopoll(): moidfy arguments. - vn_poll(), vn_statfile(): modify/add arguments, pass new arguments to vn_stat(). Pass active_cred to MAC and fp->f_cred to VOP_POLL() to maintian current semantics. - vn_close(): rename cred to file_cred to reflect reality while I'm here. - vn_stat(): Add active_cred and file_cred arguments to vn_stat() and consumers so that this distinction is maintained at the VFS as well as 'struct file' layer. Pass active_cred instead of td->td_ucred to MAC and to VOP_GETATTR() to maintain current semantics. - fifofs: modify the creation of a "filetemp" so that the file credential is properly initialized and can be used in the socket code if desired. Pass ap->a_td->td_ucred as the active credential to soo_poll(). If we teach the vnop interface about the distinction between file and active credentials, we would use the active credential here. Note that current inconsistent passing of active_cred vs. file_cred to VOP's is maintained. It's not clear why GETATTR would be authorized using active_cred while POLL would be authorized using file_cred at the file system level. Obtained from: TrustedBSD Project Sponsored by: DARPA, NAI Labs
2002-08-16 12:52:03 +00:00
struct ucred *active_cred;
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
struct thread *td;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Bow to the whining masses and change a union back into void *. Retain removal of unnecessary casts and throw in some minor cleanups to see if anyone complains, just for the hell of it.
2003-01-13 00:33:17 +00:00
struct socket *so = fp->f_data;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
bzero((caddr_t)ub, sizeof (*ub));
Instead of just blindly setting -rw-rw-rw-: o Set access mode to -r--r--r-- if SS_CANTRCVMORE is set and the receive buffer is empty. o Set access mode to --w--w--w- is SS_CANTSENDMORE is set. Discussed with: alfred
2000-07-02 23:56:45 +00:00
ub->st_mode = S_IFSOCK;
/*
* If SS_CANTRCVMORE is set, but there's still data left in the
* receive buffer, the socket is still readable.
*/
if ((so->so_state & SS_CANTRCVMORE) == 0 ||
so->so_rcv.sb_cc != 0)
ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
if ((so->so_state & SS_CANTSENDMORE) == 0)
ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
Update the st_size reported via stat(2) to accurately reflect the amount of data available to read for non-TCP sockets. Reviewed by: -net, -arch Sponsored by: NTT Multimedia Communications Labs MFC after: 2 weeks
2002-11-01 21:31:13 +00:00
ub->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
Include the UID and GID values filled in by socreate() into socket->so_cred for stat() calls. Reviewed by: phk
2000-05-11 22:08:57 +00:00
ub->st_uid = so->so_cred->cr_uid;
ub->st_gid = so->so_cred->cr_gid;
Modify the kernel to use the new pr_usrreqs interface rather than the old pr_usrreq mechanism which was poorly designed and error-prone. This commit renames pr_usrreq to pr_ousrreq so that old code which depended on it would break in an obvious manner. This commit also implements the new interface for TCP, although the old function is left as an example (#ifdef'ed out). This commit ALSO fixes a longstanding bug in the TCP timer processing (introduced by davidg on 1995/04/12) which caused timer processing on a TCB to always stop after a single timer had expired (because it misinterpreted the return value from tcp_usrreq() to indicate that the TCB had been deleted). Finally, some code related to polling has been deleted from if.c because it is not relevant t -current and doesn't look at all like my current code.
1996-07-11 16:32:50 +00:00
return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Give struct socket structures a ref counting interface similar to vnodes. This will hopefully serve as a base from which we can expand the MP code. We currently do not attempt to obtain any mutex or SX locks, but the door is open to add them when we nail down exactly how that part of it is going to work.
2001-11-17 03:07:11 +00:00
/*
* API socket close on file pointer. We call soclose() to close the
* socket (including initiating closing protocols). soclose() will
* sorele() the file reference but the actual socket will not go away
* until the socket's ref count hits 0.
*/
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
Unstaticized routines which are needed by the svr4 KLD and the streams garbage needed to support SysVR4 networking.
1999-01-30 06:25:00 +00:00
int
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
soo_close(fp, td)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct file *fp;
KSE Milestone 2 Note ALL MODULES MUST BE RECOMPILED make the kernel aware that there are smaller units of scheduling than the process. (but only allow one thread per process at this time). This is functionally equivalent to teh previousl -current except that there is a thread associated with each process. Sorry john! (your next MFC will be a doosie!) Reviewed by: peter@freebsd.org, dillon@freebsd.org X-MFC after: ha ha ha ha
2001-09-12 08:38:13 +00:00
struct thread *td;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
int error = 0;
Give struct socket structures a ref counting interface similar to vnodes. This will hopefully serve as a base from which we can expand the MP code. We currently do not attempt to obtain any mutex or SX locks, but the door is open to add them when we nail down exactly how that part of it is going to work.
2001-11-17 03:07:11 +00:00
struct socket *so;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Bow to the whining masses and change a union back into void *. Retain removal of unnecessary casts and throw in some minor cleanups to see if anyone complains, just for the hell of it.
2003-01-13 00:33:17 +00:00
so = fp->f_data;
Fix fd race conditions (during shared fd table usage.) Badfileops is now used in f_ops in place of NULL, and modifications to the files are more carefully ordered. f_ops should also be set to &badfileops upon "close" of a file. This does not fix other problems mentioned in this PR than the first one. PR: 11629 Reviewed by: peter
1999-08-04 18:53:50 +00:00
fp->f_ops = &badfileops;
Bow to the whining masses and change a union back into void *. Retain removal of unnecessary casts and throw in some minor cleanups to see if anyone complains, just for the hell of it.
2003-01-13 00:33:17 +00:00
fp->f_data = NULL;
SMP Lock struct file, filedesc and the global file list. Seigo Tanimura (tanimura) posted the initial delta. I've polished it quite a bit reducing the need for locking and adapting it for KSE. Locks: 1 mutex in each filedesc protects all the fields. protects "struct file" initialization, while a struct file is being changed from &badfileops -> &pipeops or something the filedesc should be locked. 1 mutex in each struct file protects the refcount fields. doesn't protect anything else. the flags used for garbage collection have been moved to f_gcflag which was the FILLER short, this doesn't need locking because the garbage collection is a single threaded container. could likely be made to use a pool mutex. 1 sx lock for the global filelist. struct file * fhold(struct file *fp); /* increments reference count on a file */ struct file * fhold_locked(struct file *fp); /* like fhold but expects file to locked */ struct file * ffind_hold(struct thread *, int fd); /* finds the struct file in thread, adds one reference and returns it unlocked */ struct file * ffind_lock(struct thread *, int fd); /* ffind_hold, but returns file locked */ I still have to smp-safe the fget cruft, I'll get to that asap.
2002-01-13 11:58:06 +00:00
if (so)
Give struct socket structures a ref counting interface similar to vnodes. This will hopefully serve as a base from which we can expand the MP code. We currently do not attempt to obtain any mutex or SX locks, but the door is open to add them when we nail down exactly how that part of it is going to work.
2001-11-17 03:07:11 +00:00
error = soclose(so);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return (error);
}
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