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freebsd-skq/sys/kern/vfs_export.c

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/* -> /*- for copyright notices, minor format tweaks as necessary
2005-01-06 23:35:40 +00:00
/*-
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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.
Renumber license clauses in sys/kern to avoid skipping #3
2016-09-15 13:16:20 +00:00
* 3. Neither the name of the University nor the names of its contributors
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
* 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.
*
This is the kernel Lite/2 commit. There are some requisite userland changes, so don't expect to be able to run the kernel as-is (very well) without the appropriate Lite/2 userland changes. The system boots and can mount UFS filesystems. Untested: ext2fs, msdosfs, NFS Known problems: Incorrect Berkeley ID strings in some files. Mount_std mounts will not work until the getfsent library routine is changed. Reviewed by: various people Submitted by: Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +00:00
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
Use __FBSDID().
2003-06-11 00:56:59 +00:00
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
#include "opt_inet.h"
#include "opt_inet6.h"
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
#include <sys/param.h>
Include <sys/mutex.h> and its prerequisite <sys/lock.h> instesd of depending on namespace pollution in <sys/vnode.h>. Sorted includes.
2004-04-21 12:10:30 +00:00
#include <sys/dirent.h>
Set the prison in NFS anon and GSS SVC creds. Reviewed by: marcel MFC after: 3 days
2009-09-28 18:07:16 +00:00
#include <sys/jail.h>
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
#include <sys/kernel.h>
Include <sys/mutex.h> and its prerequisite <sys/lock.h> instesd of depending on namespace pollution in <sys/vnode.h>. Sorted includes.
2004-04-21 12:10:30 +00:00
#include <sys/lock.h>
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
#include <sys/malloc.h>
Fix some signed/unsigned integer confusion, and add bounds checking of arguments to some functions. Obtained from: NetBSD Reviewed by: peter MFC after: 2 weeks
2001-09-10 11:28:07 +00:00
#include <sys/mbuf.h>
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
#include <sys/mount.h>
Include <sys/mutex.h> and its prerequisite <sys/lock.h> instesd of depending on namespace pollution in <sys/vnode.h>. Sorted includes.
2004-04-21 12:10:30 +00:00
#include <sys/mutex.h>
- convert radix node head lock from mutex to rwlock - make radix node head lock not recursive - fix LOR in rtexpunge - fix LOR in rtredirect Reviewed by: sam
2008-12-07 21:15:43 +00:00
#include <sys/rwlock.h>
Use the refcount API to manage the reference count for user credentials rather than using pool mutexes. Tested on: i386, alpha, sparc64
2005-09-27 18:09:42 +00:00
#include <sys/refcount.h>
Further refine the handling of stop signals in the NFS client. The changes in r246417 were incomplete as they did not add explicit calls to sigdeferstop() around all the places that previously passed SBDRY to _sleep(). In addition, nfs_getcacheblk() could trigger a write RPC from getblk() resulting in sigdeferstop() recursing. Rather than manually deferring stop signals in specific places, change the VFS_*() and VOP_*() methods to defer stop signals for filesystems which request this behavior via a new VFCF_SBDRY flag. Note that this has to be a VFC flag rather than a MNTK flag so that it works properly with VFS_MOUNT() when the mount is not yet fully constructed. For now, only the NFS clients are set this new flag in VFS_SET(). A few other related changes: - Add an assertion to ensure that TDF_SBDRY doesn't leak to userland. - When a lookup request uses VOP_READLINK() to follow a symlink, mark the request as being on behalf of the thread performing the lookup (cnp_thread) rather than using a NULL thread pointer. This causes NFS to properly handle signals during this VOP on an interruptible mount. PR: kern/176179 Reported by: Russell Cattelan (sigdeferstop() recursion) Reviewed by: kib MFC after: 1 month
2013-02-21 19:02:50 +00:00
#include <sys/signalvar.h>
Include <sys/mutex.h> and its prerequisite <sys/lock.h> instesd of depending on namespace pollution in <sys/vnode.h>. Sorted includes.
2004-04-21 12:10:30 +00:00
#include <sys/socket.h>
#include <sys/systm.h>
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
#include <sys/vnode.h>
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
#include <netinet/in.h>
Include <sys/mutex.h> and its prerequisite <sys/lock.h> instesd of depending on namespace pollution in <sys/vnode.h>. Sorted includes.
2004-04-21 12:10:30 +00:00
#include <net/radix.h>
Normalize a significant number of kernel malloc type names: - Prefer '_' to ' ', as it results in more easily parsed results in memory monitoring tools such as vmstat. - Remove punctuation that is incompatible with using memory type names as file names, such as '/' characters. - Disambiguate some collisions by adding subsystem prefixes to some memory types. - Generally prefer lower case to upper case. - If the same type is defined in multiple architecture directories, attempt to use the same name in additional cases. Not all instances were caught in this change, so more work is required to finish this conversion. Similar changes are required for UMA zone names.
2005-10-31 15:41:29 +00:00
static MALLOC_DEFINE(M_NETADDR, "export_host", "Export host address structure");
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Fix build when no INET and INET6 in kernel config. Submitted by: kan Sponsored by: DARPA, AFRL
2016-11-17 16:13:30 +00:00
#if defined(INET) || defined(INET6)
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
static struct radix_node_head *vfs_create_addrlist_af(
struct radix_node_head **prnh, int off);
Fix build when no INET and INET6 in kernel config. Submitted by: kan Sponsored by: DARPA, AFRL
2016-11-17 16:13:30 +00:00
#endif
Remove __P.
2002-03-19 21:25:46 +00:00
static void vfs_free_addrlist(struct netexport *nep);
static int vfs_free_netcred(struct radix_node *rn, void *w);
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
static void vfs_free_addrlist_af(struct radix_node_head **prnh);
Remove __P.
2002-03-19 21:25:46 +00:00
static int vfs_hang_addrlist(struct mount *mp, struct netexport *nep,
Fixed some style bugs in the removal of __P(()). The main ones were not removing tabs before "__P((", and not outdenting continuation lines to preserve non-KNF lining up of code with parentheses. Switch to KNF formatting and/or rewrap the whole prototype in some cases.
2002-03-24 05:09:11 +00:00
struct export_args *argp);
Make various mountpoint related functions static.
2005-02-10 12:25:38 +00:00
static struct netcred *vfs_export_lookup(struct mount *, struct sockaddr *);
Mega commit for sysctl. Convert the remaining sysctl stuff to the new way of doing things. the devconf stuff is the reason for the large number of files. Cleaned up some compiler warnings while I were there.
1995-11-20 12:42:39 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
* Network address lookup element
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
struct netcred {
struct radix_node netc_rnodes[2];
int netc_exflags;
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
struct ucred *netc_anon;
Implement support for RPCSEC_GSS authentication to both the NFS client and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
2008-11-03 10:38:00 +00:00
int netc_numsecflavors;
int netc_secflavors[MAXSECFLAVORS];
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
};
This is the kernel Lite/2 commit. There are some requisite userland changes, so don't expect to be able to run the kernel as-is (very well) without the appropriate Lite/2 userland changes. The system boots and can mount UFS filesystems. Untested: ext2fs, msdosfs, NFS Known problems: Incorrect Berkeley ID strings in some files. Mount_std mounts will not work until the getfsent library routine is changed. Reviewed by: various people Submitted by: Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +00:00
/*
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
* Network export information
This is the kernel Lite/2 commit. There are some requisite userland changes, so don't expect to be able to run the kernel as-is (very well) without the appropriate Lite/2 userland changes. The system boots and can mount UFS filesystems. Untested: ext2fs, msdosfs, NFS Known problems: Incorrect Berkeley ID strings in some files. Mount_std mounts will not work until the getfsent library routine is changed. Reviewed by: various people Submitted by: Jeffery Hsu <hsu@freebsd.org>
1997-02-10 02:22:35 +00:00
*/
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
struct netexport {
struct netcred ne_defexported; /* Default export */
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
struct radix_node_head *ne4;
struct radix_node_head *ne6;
vfs_subr.c is getting rather fat. The underlying repocopy and this commit moves the filesystem export handling code to vfs_export.c
2001-04-26 20:47:14 +00:00
};
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Build hash lists of net addresses and hang them off the mount point.
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
* Called by vfs_export() to set up the lists of export addresses.
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
*/
static int
Convert to ANSI-style function prototypes.
2006-12-16 12:06:59 +00:00
vfs_hang_addrlist(struct mount *mp, struct netexport *nep,
struct export_args *argp)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Remove register keyword from sys/ and ANSIfy prototypes A long long time ago the register keyword told the compiler to store the corresponding variable in a CPU register, but it is not relevant for any compiler used in the FreeBSD world today. ANSIfy related prototypes while here. Reviewed by: cem, jhb Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D10193
2017-05-17 00:34:34 +00:00
struct netcred *np;
struct radix_node_head *rnh;
int i;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct radix_node *rn;
kern: for pointers replace 0 with NULL. These are mostly cosmetical, no functional change. Found with devel/coccinelle.
2016-04-15 16:10:11 +00:00
struct sockaddr *saddr, *smask = NULL;
After the changes in r274118 make NOIP kernels compile by hiding an otherwise unused variable declaration behind INET6 || INET. MFC after: 27 days X-MFS with: r274118
2014-11-06 12:19:39 +00:00
#if defined(INET6) || defined(INET)
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
int off;
After the changes in r274118 make NOIP kernels compile by hiding an otherwise unused variable declaration behind INET6 || INET. MFC after: 27 days X-MFS with: r274118
2014-11-06 12:19:39 +00:00
#endif
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int error;
Check the version of ex_anon (a `struct xucred') before using it to fill out netc_anon (a `struct ucred'), and add an XXX around the entire operation since it isn't clear whether it's doing the right thing with things like cr_uidinfo and cr_prison.
2002-03-03 06:07:57 +00:00
/*
* XXX: This routine converts from a `struct xucred'
* (argp->ex_anon) to a `struct ucred' (np->netc_anon). This
* operation is questionable; for example, what should be done
* with fields like cr_uidinfo and cr_prison? Currently, this
* routine does not touch them (leaves them as NULL).
*/
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
if (argp->ex_anon.cr_version != XUCRED_VERSION) {
vfs_mount_error(mp, "ex_anon.cr_version: %d != %d",
argp->ex_anon.cr_version, XUCRED_VERSION);
Check the version of ex_anon (a `struct xucred') before using it to fill out netc_anon (a `struct ucred'), and add an XXX around the entire operation since it isn't clear whether it's doing the right thing with things like cr_uidinfo and cr_prison.
2002-03-03 06:07:57 +00:00
return (EINVAL);
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
}
Check the version of ex_anon (a `struct xucred') before using it to fill out netc_anon (a `struct ucred'), and add an XXX around the entire operation since it isn't clear whether it's doing the right thing with things like cr_uidinfo and cr_prison.
2002-03-03 06:07:57 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (argp->ex_addrlen == 0) {
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
if (mp->mnt_flag & MNT_DEFEXPORTED) {
vfs_mount_error(mp,
"MNT_DEFEXPORTED already set for mount %p", mp);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return (EPERM);
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
np = &nep->ne_defexported;
np->netc_exflags = argp->ex_flags;
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
np->netc_anon = crget();
np->netc_anon->cr_uid = argp->ex_anon.cr_uid;
Rework the credential code to support larger values of NGROUPS and NGROUPS_MAX, eliminate ABI dependencies on them, and raise the to 1024 and 1023 respectively. (Previously they were equal, but under a close reading of POSIX, NGROUPS_MAX was defined to be too large by 1 since it is the number of supplemental groups, not total number of groups.) The bulk of the change consists of converting the struct ucred member cr_groups from a static array to a pointer. Do the equivalent in kinfo_proc. Introduce new interfaces crcopysafe() and crsetgroups() for duplicating a process credential before modifying it and for setting group lists respectively. Both interfaces take care for the details of allocating groups array. crsetgroups() takes care of truncating the group list to the current maximum (NGROUPS) if necessary. In the future, crsetgroups() may be responsible for insuring invariants such as sorting the supplemental groups to allow groupmember() to be implemented as a binary search. Because we can not change struct xucred without breaking application ABIs, we leave it alone and introduce a new XU_NGROUPS value which is always 16 and is to be used or NGRPS as appropriate for things such as NFS which need to use no more than 16 groups. When feasible, truncate the group list rather than generating an error. Minor changes: - Reduce the number of hand rolled versions of groupmember(). - Do not assign to both cr_gid and cr_groups[0]. - Modify ipfw to cache ucreds instead of part of their contents since they are immutable once referenced by more than one entity. Submitted by: Isilon Systems (initial implementation) X-MFC after: never PR: bin/113398 kern/133867
2009-06-19 17:10:35 +00:00
crsetgroups(np->netc_anon, argp->ex_anon.cr_ngroups,
argp->ex_anon.cr_groups);
Set the prison in NFS anon and GSS SVC creds. Reviewed by: marcel MFC after: 3 days
2009-09-28 18:07:16 +00:00
np->netc_anon->cr_prison = &prison0;
prison_hold(np->netc_anon->cr_prison);
Implement support for RPCSEC_GSS authentication to both the NFS client and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
2008-11-03 10:38:00 +00:00
np->netc_numsecflavors = argp->ex_numsecflavors;
bcopy(argp->ex_secflavors, np->netc_secflavors,
sizeof(np->netc_secflavors));
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_ILOCK(mp);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
mp->mnt_flag |= MNT_DEFEXPORTED;
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_IUNLOCK(mp);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return (0);
}
Fix some signed/unsigned integer confusion, and add bounds checking of arguments to some functions. Obtained from: NetBSD Reviewed by: peter MFC after: 2 weeks
2001-09-10 11:28:07 +00:00
Guard against MLEN growing larger than a uint8_t due to MSIZE grwoing to a value of 512 in LINT. This keeps gcc from complaining.
2003-07-26 07:23:24 +00:00
#if MSIZE <= 256
Use vfs_mount_error() to log mount errors in a few places with human readable strings which can be retrieved if an "errmsg" parameter is passed into nmount().
2006-12-07 02:57:00 +00:00
if (argp->ex_addrlen > MLEN) {
vfs_mount_error(mp, "ex_addrlen %d is greater than %d",
argp->ex_addrlen, MLEN);
Fix some signed/unsigned integer confusion, and add bounds checking of arguments to some functions. Obtained from: NetBSD Reviewed by: peter MFC after: 2 weeks
2001-09-10 11:28:07 +00:00
return (EINVAL);
Use vfs_mount_error() to log mount errors in a few places with human readable strings which can be retrieved if an "errmsg" parameter is passed into nmount().
2006-12-07 02:57:00 +00:00
}
Guard against MLEN growing larger than a uint8_t due to MSIZE grwoing to a value of 512 in LINT. This keeps gcc from complaining.
2003-07-26 07:23:24 +00:00
#endif
Fix some signed/unsigned integer confusion, and add bounds checking of arguments to some functions. Obtained from: NetBSD Reviewed by: peter MFC after: 2 weeks
2001-09-10 11:28:07 +00:00
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
i = sizeof(struct netcred) + argp->ex_addrlen + argp->ex_masklen;
Back out M_* changes, per decision of the TRB. Approved by: trb
2003-02-19 05:47:46 +00:00
np = (struct netcred *) malloc(i, M_NETADDR, M_WAITOK | M_ZERO);
These changes embody the support of the fully coherent merged VM buffer cache, much higher filesystem I/O performance, and much better paging performance. It represents the culmination of over 6 months of R&D. The majority of the merged VM/cache work is by John Dyson. The following highlights the most significant changes. Additionally, there are (mostly minor) changes to the various filesystem modules (nfs, msdosfs, etc) to support the new VM/buffer scheme. vfs_bio.c: Significant rewrite of most of vfs_bio to support the merged VM buffer cache scheme. The scheme is almost fully compatible with the old filesystem interface. Significant improvement in the number of opportunities for write clustering. vfs_cluster.c, vfs_subr.c Upgrade and performance enhancements in vfs layer code to support merged VM/buffer cache. Fixup of vfs_cluster to eliminate the bogus pagemove stuff. vm_object.c: Yet more improvements in the collapse code. Elimination of some windows that can cause list corruption. vm_pageout.c: Fixed it, it really works better now. Somehow in 2.0, some "enhancements" broke the code. This code has been reworked from the ground-up. vm_fault.c, vm_page.c, pmap.c, vm_object.c Support for small-block filesystems with merged VM/buffer cache scheme. pmap.c vm_map.c Dynamic kernel VM size, now we dont have to pre-allocate excessive numbers of kernel PTs. vm_glue.c Much simpler and more effective swapping code. No more gratuitous swapping. proc.h Fixed the problem that the p_lock flag was not being cleared on a fork. swap_pager.c, vnode_pager.c Removal of old vfs_bio cruft to support the past pseudo-coherency. Now the code doesn't need it anymore. machdep.c Changes to better support the parameter values for the merged VM/buffer cache scheme. machdep.c, kern_exec.c, vm_glue.c Implemented a seperate submap for temporary exec string space and another one to contain process upages. This eliminates all map fragmentation problems that previously existed. ffs_inode.c, ufs_inode.c, ufs_readwrite.c Changes for merged VM/buffer cache. Add "bypass" support for sneaking in on busy buffers. Submitted by: John Dyson and David Greenman
1995-01-09 16:06:02 +00:00
saddr = (struct sockaddr *) (np + 1);
nuke caddr_t.
2002-06-28 23:17:36 +00:00
if ((error = copyin(argp->ex_addr, saddr, argp->ex_addrlen)))
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
goto out;
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
if (saddr->sa_family == AF_UNSPEC || saddr->sa_family > AF_MAX) {
Check that saddr->sa_family is a sensible value before using it. Reported by: Bryan Fulton and Ted Unangst, Coverity, Inc. Found by: The SWAT analysis tool
2004-11-28 19:16:00 +00:00
error = EINVAL;
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
vfs_mount_error(mp, "Invalid saddr->sa_family: %d");
Check that saddr->sa_family is a sensible value before using it. Reported by: Bryan Fulton and Ted Unangst, Coverity, Inc. Found by: The SWAT analysis tool
2004-11-28 19:16:00 +00:00
goto out;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (saddr->sa_len > argp->ex_addrlen)
saddr->sa_len = argp->ex_addrlen;
if (argp->ex_masklen) {
Unbreak computation of 'smask' that I broke when removing caddr_t. Submitted by: bde
2002-06-29 17:56:34 +00:00
smask = (struct sockaddr *)((caddr_t)saddr + argp->ex_addrlen);
nuke caddr_t.
2002-06-28 23:17:36 +00:00
error = copyin(argp->ex_mask, smask, argp->ex_masklen);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (error)
goto out;
if (smask->sa_len > argp->ex_masklen)
smask->sa_len = argp->ex_masklen;
}
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
rnh = NULL;
switch (saddr->sa_family) {
#ifdef INET
case AF_INET:
if ((rnh = nep->ne4) == NULL) {
off = offsetof(struct sockaddr_in, sin_addr) << 3;
rnh = vfs_create_addrlist_af(&nep->ne4, off);
Add code to allow the system to handle multiple routing tables. This particular implementation is designed to be fully backwards compatible and to be MFC-able to 7.x (and 6.x) Currently the only protocol that can make use of the multiple tables is IPv4 Similar functionality exists in OpenBSD and Linux. From my notes: ----- One thing where FreeBSD has been falling behind, and which by chance I have some time to work on is "policy based routing", which allows different packet streams to be routed by more than just the destination address. Constraints: ------------ I want to make some form of this available in the 6.x tree (and by extension 7.x) , but FreeBSD in general needs it so I might as well do it in -current and back port the portions I need. One of the ways that this can be done is to have the ability to instantiate multiple kernel routing tables (which I will now refer to as "Forwarding Information Bases" or "FIBs" for political correctness reasons). Which FIB a particular packet uses to make the next hop decision can be decided by a number of mechanisms. The policies these mechanisms implement are the "Policies" referred to in "Policy based routing". One of the constraints I have if I try to back port this work to 6.x is that it must be implemented as a EXTENSION to the existing ABIs in 6.x so that third party applications do not need to be recompiled in timespan of the branch. This first version will not have some of the bells and whistles that will come with later versions. It will, for example, be limited to 16 tables in the first commit. Implementation method, Compatible version. (part 1) ------------------------------- For this reason I have implemented a "sufficient subset" of a multiple routing table solution in Perforce, and back-ported it to 6.x. (also in Perforce though not always caught up with what I have done in -current/P4). The subset allows a number of FIBs to be defined at compile time (8 is sufficient for my purposes in 6.x) and implements the changes needed to allow IPV4 to use them. I have not done the changes for ipv6 simply because I do not need it, and I do not have enough knowledge of ipv6 (e.g. neighbor discovery) needed to do it. Other protocol families are left untouched and should there be users with proprietary protocol families, they should continue to work and be oblivious to the existence of the extra FIBs. To understand how this is done, one must know that the current FIB code starts everything off with a single dimensional array of pointers to FIB head structures (One per protocol family), each of which in turn points to the trie of routes available to that family. The basic change in the ABI compatible version of the change is to extent that array to be a 2 dimensional array, so that instead of protocol family X looking at rt_tables[X] for the table it needs, it looks at rt_tables[Y][X] when for all protocol families except ipv4 Y is always 0. Code that is unaware of the change always just sees the first row of the table, which of course looks just like the one dimensional array that existed before. The entry points rtrequest(), rtalloc(), rtalloc1(), rtalloc_ign() are all maintained, but refer only to the first row of the array, so that existing callers in proprietary protocols can continue to do the "right thing". Some new entry points are added, for the exclusive use of ipv4 code called in_rtrequest(), in_rtalloc(), in_rtalloc1() and in_rtalloc_ign(), which have an extra argument which refers the code to the correct row. In addition, there are some new entry points (currently called rtalloc_fib() and friends) that check the Address family being looked up and call either rtalloc() (and friends) if the protocol is not IPv4 forcing the action to row 0 or to the appropriate row if it IS IPv4 (and that info is available). These are for calling from code that is not specific to any particular protocol. The way these are implemented would change in the non ABI preserving code to be added later. One feature of the first version of the code is that for ipv4, the interface routes show up automatically on all the FIBs, so that no matter what FIB you select you always have the basic direct attached hosts available to you. (rtinit() does this automatically). You CAN delete an interface route from one FIB should you want to but by default it's there. ARP information is also available in each FIB. It's assumed that the same machine would have the same MAC address, regardless of which FIB you are using to get to it. This brings us as to how the correct FIB is selected for an outgoing IPV4 packet. Firstly, all packets have a FIB associated with them. if nothing has been done to change it, it will be FIB 0. The FIB is changed in the following ways. Packets fall into one of a number of classes. 1/ locally generated packets, coming from a socket/PCB. Such packets select a FIB from a number associated with the socket/PCB. This in turn is inherited from the process, but can be changed by a socket option. The process in turn inherits it on fork. I have written a utility call setfib that acts a bit like nice.. setfib -3 ping target.example.com # will use fib 3 for ping. It is an obvious extension to make it a property of a jail but I have not done so. It can be achieved by combining the setfib and jail commands. 2/ packets received on an interface for forwarding. By default these packets would use table 0, (or possibly a number settable in a sysctl(not yet)). but prior to routing the firewall can inspect them (see below). (possibly in the future you may be able to associate a FIB with packets received on an interface.. An ifconfig arg, but not yet.) 3/ packets inspected by a packet classifier, which can arbitrarily associate a fib with it on a packet by packet basis. A fib assigned to a packet by a packet classifier (such as ipfw) would over-ride a fib associated by a more default source. (such as cases 1 or 2). 4/ a tcp listen socket associated with a fib will generate accept sockets that are associated with that same fib. 5/ Packets generated in response to some other packet (e.g. reset or icmp packets). These should use the FIB associated with the packet being reponded to. 6/ Packets generated during encapsulation. gif, tun and other tunnel interfaces will encapsulate using the FIB that was in effect withthe proces that set up the tunnel. thus setfib 1 ifconfig gif0 [tunnel instructions] will set the fib for the tunnel to use to be fib 1. Routing messages would be associated with their process, and thus select one FIB or another. messages from the kernel would be associated with the fib they refer to and would only be received by a routing socket associated with that fib. (not yet implemented) In addition Netstat has been edited to be able to cope with the fact that the array is now 2 dimensional. (It looks in system memory using libkvm (!)). Old versions of netstat see only the first FIB. In addition two sysctls are added to give: a) the number of FIBs compiled in (active) b) the default FIB of the calling process. Early testing experience: ------------------------- Basically our (IronPort's) appliance does this functionality already using ipfw fwd but that method has some drawbacks. For example, It can't fully simulate a routing table because it can't influence the socket's choice of local address when a connect() is done. Testing during the generating of these changes has been remarkably smooth so far. Multiple tables have co-existed with no notable side effects, and packets have been routes accordingly. ipfw has grown 2 new keywords: setfib N ip from anay to any count ip from any to any fib N In pf there seems to be a requirement to be able to give symbolic names to the fibs but I do not have that capacity. I am not sure if it is required. SCTP has interestingly enough built in support for this, called VRFs in Cisco parlance. it will be interesting to see how that handles it when it suddenly actually does something. Where to next: -------------------- After committing the ABI compatible version and MFCing it, I'd like to proceed in a forward direction in -current. this will result in some roto-tilling in the routing code. Firstly: the current code's idea of having a separate tree per protocol family, all of the same format, and pointed to by the 1 dimensional array is a bit silly. Especially when one considers that there is code that makes assumptions about every protocol having the same internal structures there. Some protocols don't WANT that sort of structure. (for example the whole idea of a netmask is foreign to appletalk). This needs to be made opaque to the external code. My suggested first change is to add routing method pointers to the 'domain' structure, along with information pointing the data. instead of having an array of pointers to uniform structures, there would be an array pointing to the 'domain' structures for each protocol address domain (protocol family), and the methods this reached would be called. The methods would have an argument that gives FIB number, but the protocol would be free to ignore it. When the ABI can be changed it raises the possibilty of the addition of a fib entry into the "struct route". Currently, the structure contains the sockaddr of the desination, and the resulting fib entry. To make this work fully, one could add a fib number so that given an address and a fib, one can find the third element, the fib entry. Interaction with the ARP layer/ LL layer would need to be revisited as well. Qing Li has been working on this already. This work was sponsored by Ironport Systems/Cisco Reviewed by: several including rwatson, bz and mlair (parts each) Obtained from: Ironport systems/Cisco
2008-05-09 23:03:00 +00:00
}
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
break;
#endif
#ifdef INET6
case AF_INET6:
if ((rnh = nep->ne6) == NULL) {
off = offsetof(struct sockaddr_in6, sin6_addr) << 3;
rnh = vfs_create_addrlist_af(&nep->ne6, off);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
break;
#endif
}
if (rnh == NULL) {
error = ENOBUFS;
vfs_mount_error(mp, "%s %s %d",
"Unable to initialize radix node head ",
"for address family", saddr->sa_family);
goto out;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
SMP locking for radix nodes.
2002-12-24 03:03:39 +00:00
RADIX_NODE_HEAD_LOCK(rnh);
MFP r287070,r287073: split radix implementation and route table structure. There are number of radix consumers in kernel land (pf,ipfw,nfs,route) with different requirements. In fact, first 3 don't have _any_ requirements and first 2 does not use radix locking. On the other hand, routing structure do have these requirements (rnh_gen, multipath, custom to-be-added control plane functions, different locking). Additionally, radix should not known anything about its consumers internals. So, radix code now uses tiny 'struct radix_head' structure along with internal 'struct radix_mask_head' instead of 'struct radix_node_head'. Existing consumers still uses the same 'struct radix_node_head' with slight modifications: they need to pass pointer to (embedded) 'struct radix_head' to all radix callbacks. Routing code now uses new 'struct rib_head' with different locking macro: RADIX_NODE_HEAD prefix was renamed to RIB_ (which stands for routing information base). New net/route_var.h header was added to hold routing subsystem internal data. 'struct rib_head' was placed there. 'struct rtentry' will also be moved there soon.
2016-01-25 06:33:15 +00:00
rn = (*rnh->rnh_addaddr)(saddr, smask, &rnh->rh, np->netc_rnodes);
SMP locking for radix nodes.
2002-12-24 03:03:39 +00:00
RADIX_NODE_HEAD_UNLOCK(rnh);
if (rn == NULL || np != (struct netcred *)rn) { /* already exists */
Partial backout of 1.318, remove error handling added because it may be incorrect. Requested by: bde
2002-06-30 05:23:58 +00:00
error = EPERM;
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
vfs_mount_error(mp,
"netcred already exists for given addr/mask");
Partial backout of 1.318, remove error handling added because it may be incorrect. Requested by: bde
2002-06-30 05:23:58 +00:00
goto out;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
np->netc_exflags = argp->ex_flags;
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
np->netc_anon = crget();
np->netc_anon->cr_uid = argp->ex_anon.cr_uid;
Rework the credential code to support larger values of NGROUPS and NGROUPS_MAX, eliminate ABI dependencies on them, and raise the to 1024 and 1023 respectively. (Previously they were equal, but under a close reading of POSIX, NGROUPS_MAX was defined to be too large by 1 since it is the number of supplemental groups, not total number of groups.) The bulk of the change consists of converting the struct ucred member cr_groups from a static array to a pointer. Do the equivalent in kinfo_proc. Introduce new interfaces crcopysafe() and crsetgroups() for duplicating a process credential before modifying it and for setting group lists respectively. Both interfaces take care for the details of allocating groups array. crsetgroups() takes care of truncating the group list to the current maximum (NGROUPS) if necessary. In the future, crsetgroups() may be responsible for insuring invariants such as sorting the supplemental groups to allow groupmember() to be implemented as a binary search. Because we can not change struct xucred without breaking application ABIs, we leave it alone and introduce a new XU_NGROUPS value which is always 16 and is to be used or NGRPS as appropriate for things such as NFS which need to use no more than 16 groups. When feasible, truncate the group list rather than generating an error. Minor changes: - Reduce the number of hand rolled versions of groupmember(). - Do not assign to both cr_gid and cr_groups[0]. - Modify ipfw to cache ucreds instead of part of their contents since they are immutable once referenced by more than one entity. Submitted by: Isilon Systems (initial implementation) X-MFC after: never PR: bin/113398 kern/133867
2009-06-19 17:10:35 +00:00
crsetgroups(np->netc_anon, argp->ex_anon.cr_ngroups,
The group list for a non-default export entry (a host/subnet one) was being copied from the wrong place. This patch fixes that. This could cause access failures for mapped users, when the group permissions were needed. PR: 147998 Submitted by: Christopher Key (cjk32 at cam.ac.uk) MFC after: 2 weeks
2012-12-14 21:49:06 +00:00
argp->ex_anon.cr_groups);
Set the prison in NFS anon and GSS SVC creds. Reviewed by: marcel MFC after: 3 days
2009-09-28 18:07:16 +00:00
np->netc_anon->cr_prison = &prison0;
prison_hold(np->netc_anon->cr_prison);
Implement support for RPCSEC_GSS authentication to both the NFS client and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
2008-11-03 10:38:00 +00:00
np->netc_numsecflavors = argp->ex_numsecflavors;
bcopy(argp->ex_secflavors, np->netc_secflavors,
sizeof(np->netc_secflavors));
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return (0);
out:
free(np, M_NETADDR);
return (error);
}
Style fixes based on comments by bde
2000-10-05 18:22:46 +00:00
/* Helper for vfs_free_addrlist. */
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/* ARGSUSED */
static int
Convert to ANSI-style function prototypes.
2006-12-16 12:06:59 +00:00
vfs_free_netcred(struct radix_node *rn, void *w)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Free struct ucreds allocated in vfs_hang_addrlist() when deleting the export element. While there, remove register storage-class specifiers. Reported and tested by: pho Reviewed by: kan Approved by: re (kensmith)
2009-06-29 18:09:07 +00:00
struct radix_node_head *rnh = (struct radix_node_head *) w;
struct ucred *cred;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
MFP r287070,r287073: split radix implementation and route table structure. There are number of radix consumers in kernel land (pf,ipfw,nfs,route) with different requirements. In fact, first 3 don't have _any_ requirements and first 2 does not use radix locking. On the other hand, routing structure do have these requirements (rnh_gen, multipath, custom to-be-added control plane functions, different locking). Additionally, radix should not known anything about its consumers internals. So, radix code now uses tiny 'struct radix_head' structure along with internal 'struct radix_mask_head' instead of 'struct radix_node_head'. Existing consumers still uses the same 'struct radix_node_head' with slight modifications: they need to pass pointer to (embedded) 'struct radix_head' to all radix callbacks. Routing code now uses new 'struct rib_head' with different locking macro: RADIX_NODE_HEAD prefix was renamed to RIB_ (which stands for routing information base). New net/route_var.h header was added to hold routing subsystem internal data. 'struct rib_head' was placed there. 'struct rtentry' will also be moved there soon.
2016-01-25 06:33:15 +00:00
(*rnh->rnh_deladdr) (rn->rn_key, rn->rn_mask, &rnh->rh);
Free struct ucreds allocated in vfs_hang_addrlist() when deleting the export element. While there, remove register storage-class specifiers. Reported and tested by: pho Reviewed by: kan Approved by: re (kensmith)
2009-06-29 18:09:07 +00:00
cred = ((struct netcred *)rn)->netc_anon;
if (cred != NULL)
crfree(cred);
nuke caddr_t.
2002-06-28 23:17:36 +00:00
free(rn, M_NETADDR);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
return (0);
}
These changes embody the support of the fully coherent merged VM buffer cache, much higher filesystem I/O performance, and much better paging performance. It represents the culmination of over 6 months of R&D. The majority of the merged VM/cache work is by John Dyson. The following highlights the most significant changes. Additionally, there are (mostly minor) changes to the various filesystem modules (nfs, msdosfs, etc) to support the new VM/buffer scheme. vfs_bio.c: Significant rewrite of most of vfs_bio to support the merged VM buffer cache scheme. The scheme is almost fully compatible with the old filesystem interface. Significant improvement in the number of opportunities for write clustering. vfs_cluster.c, vfs_subr.c Upgrade and performance enhancements in vfs layer code to support merged VM/buffer cache. Fixup of vfs_cluster to eliminate the bogus pagemove stuff. vm_object.c: Yet more improvements in the collapse code. Elimination of some windows that can cause list corruption. vm_pageout.c: Fixed it, it really works better now. Somehow in 2.0, some "enhancements" broke the code. This code has been reworked from the ground-up. vm_fault.c, vm_page.c, pmap.c, vm_object.c Support for small-block filesystems with merged VM/buffer cache scheme. pmap.c vm_map.c Dynamic kernel VM size, now we dont have to pre-allocate excessive numbers of kernel PTs. vm_glue.c Much simpler and more effective swapping code. No more gratuitous swapping. proc.h Fixed the problem that the p_lock flag was not being cleared on a fork. swap_pager.c, vnode_pager.c Removal of old vfs_bio cruft to support the past pseudo-coherency. Now the code doesn't need it anymore. machdep.c Changes to better support the parameter values for the merged VM/buffer cache scheme. machdep.c, kern_exec.c, vm_glue.c Implemented a seperate submap for temporary exec string space and another one to contain process upages. This eliminates all map fragmentation problems that previously existed. ffs_inode.c, ufs_inode.c, ufs_readwrite.c Changes for merged VM/buffer cache. Add "bypass" support for sneaking in on busy buffers. Submitted by: John Dyson and David Greenman
1995-01-09 16:06:02 +00:00
Fix build when no INET and INET6 in kernel config. Submitted by: kan Sponsored by: DARPA, AFRL
2016-11-17 16:13:30 +00:00
#if defined(INET) || defined(INET6)
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
static struct radix_node_head *
vfs_create_addrlist_af(struct radix_node_head **prnh, int off)
{
if (rn_inithead((void **)prnh, off) == 0)
return (NULL);
RADIX_NODE_HEAD_LOCK_INIT(*prnh);
return (*prnh);
}
Fix build when no INET and INET6 in kernel config. Submitted by: kan Sponsored by: DARPA, AFRL
2016-11-17 16:13:30 +00:00
#endif
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
static void
vfs_free_addrlist_af(struct radix_node_head **prnh)
{
struct radix_node_head *rnh;
rnh = *prnh;
RADIX_NODE_HEAD_LOCK(rnh);
Pass the expected struct radix_node_head * to vfs_free_netcred. No functional change. struct radix_node_head's first element is rh so this was already referring to the same address. It was likely an unintended s/rnh/&rnh->rh/ change from r294706 as all other rnh_walktree() callers pass the expected struct radix_node_head * rather than obscurely passing the address of their first element. Sponsored by: EMC / Isilon Storage Division
2016-03-24 04:40:07 +00:00
(*rnh->rnh_walktree)(&rnh->rh, vfs_free_netcred, rnh);
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
RADIX_NODE_HEAD_UNLOCK(rnh);
RADIX_NODE_HEAD_DESTROY(rnh);
Fix M_RTABLE memory leak from r274118 (11/2014). Replace free(M_RTABLE) with rn_detachhead() to match rn_inithead(). This would trigger when reloading NFS exports and was similar to problems with pf reload [1]. PR: 194078 [1] Sponsored by: EMC / Isilon Storage Division
2016-03-24 03:08:39 +00:00
rn_detachhead((void **)prnh);
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
prnh = NULL;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
/*
* Free the net address hash lists that are hanging off the mount points.
*/
static void
Convert to ANSI-style function prototypes.
2006-12-16 12:06:59 +00:00
vfs_free_addrlist(struct netexport *nep)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Free struct ucreds allocated in vfs_hang_addrlist() when deleting the export element. While there, remove register storage-class specifiers. Reported and tested by: pho Reviewed by: kan Approved by: re (kensmith)
2009-06-29 18:09:07 +00:00
struct ucred *cred;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
if (nep->ne4 != NULL)
vfs_free_addrlist_af(&nep->ne4);
if (nep->ne6 != NULL)
vfs_free_addrlist_af(&nep->ne6);
Free struct ucreds allocated in vfs_hang_addrlist() when deleting the export element. While there, remove register storage-class specifiers. Reported and tested by: pho Reviewed by: kan Approved by: re (kensmith)
2009-06-29 18:09:07 +00:00
cred = nep->ne_defexported.netc_anon;
if (cred != NULL)
crfree(cred);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
comment vfs_export functions, requested by: eivind
2000-09-21 15:55:55 +00:00
/*
* High level function to manipulate export options on a mount point
* and the passed in netexport.
* Struct export_args *argp is the variable used to twiddle options,
* the structure is described in sys/mount.h
*/
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int
Convert to ANSI-style function prototypes.
2006-12-16 12:06:59 +00:00
vfs_export(struct mount *mp, struct export_args *argp)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
struct netexport *nep;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
int error;
Implement support for RPCSEC_GSS authentication to both the NFS client and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
2008-11-03 10:38:00 +00:00
if (argp->ex_numsecflavors < 0
|| argp->ex_numsecflavors >= MAXSECFLAVORS)
return (EINVAL);
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
error = 0;
Provide the mutual exclusion between the nfs export list modifications and nfs requests processing. Lockmgr lock provides the shared locking for nfs requests, while exclusive mode is used for modifications. The writer starvation is handled by lockmgr too. Reported by: kris, pho, many Based on the submission by: mohan Tested by: pho MFC after: 2 weeks
2008-06-09 10:31:38 +00:00
lockmgr(&mp->mnt_explock, LK_EXCLUSIVE, NULL);
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
nep = mp->mnt_export;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (argp->ex_flags & MNT_DELEXPORT) {
In vfs_export(), if we specify MNT_DELEXPORT in the struct export_args, after we perform the operations to delete the export, call vfs_deleteopt() to delete the "export" mount option from the linked list of mount options associated with that mount point. This fixes one scenario: - put a filesystem in /etc/exports to export it - remove the filesystem from /etc/exports to delete the export and restart mountd - try to do a "mount -u -o ro" or "mount -u -o rw" on that filesystem now that it is no longer exported.
2006-12-16 15:50:36 +00:00
if (nep == NULL) {
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
error = ENOENT;
goto out;
In vfs_export(), if we specify MNT_DELEXPORT in the struct export_args, after we perform the operations to delete the export, call vfs_deleteopt() to delete the "export" mount option from the linked list of mount options associated with that mount point. This fixes one scenario: - put a filesystem in /etc/exports to export it - remove the filesystem from /etc/exports to delete the export and restart mountd - try to do a "mount -u -o ro" or "mount -u -o rw" on that filesystem now that it is no longer exported.
2006-12-16 15:50:36 +00:00
}
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
if (mp->mnt_flag & MNT_EXPUBLIC) {
vfs_setpublicfs(NULL, NULL, NULL);
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_ILOCK(mp);
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
mp->mnt_flag &= ~MNT_EXPUBLIC;
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_IUNLOCK(mp);
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
vfs_free_addrlist(nep);
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
mp->mnt_export = NULL;
free(nep, M_MOUNT);
Handle theoretical case of vfs_export being called with both MNT_DELEXPORT and MNT_EXPORT flags set. Do not reuse the memory that has just been freed.
2005-05-11 18:25:42 +00:00
nep = NULL;
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_ILOCK(mp);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
mp->mnt_flag &= ~(MNT_EXPORTED | MNT_DEFEXPORTED);
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_IUNLOCK(mp);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
if (argp->ex_flags & MNT_EXPORTED) {
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
if (nep == NULL) {
Back out M_* changes, per decision of the TRB. Approved by: trb
2003-02-19 05:47:46 +00:00
nep = malloc(sizeof(struct netexport), M_MOUNT, M_WAITOK | M_ZERO);
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
mp->mnt_export = nep;
}
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
if (argp->ex_flags & MNT_EXPUBLIC) {
if ((error = vfs_setpublicfs(mp, nep, argp)) != 0)
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
goto out;
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_ILOCK(mp);
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
mp->mnt_flag |= MNT_EXPUBLIC;
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_IUNLOCK(mp);
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
}
While in the real world, I had a bad case of being swapped out for a lot of cycles. While waiting there I added a lot of the extra ()'s I have, (I have never used LISP to any extent). So I compiled the kernel with -Wall and shut up a lot of "suggest you add ()'s", removed a bunch of unused var's and added a couple of declarations here and there. Having a lap-top is highly recommended. My kernel still runs, yell at me if you kernel breaks.
1994-09-25 19:34:02 +00:00
if ((error = vfs_hang_addrlist(mp, nep, argp)))
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
goto out;
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_ILOCK(mp);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
mp->mnt_flag |= MNT_EXPORTED;
Use mount interlock to protect all changes to mnt_flag and mnt_kern_flag. This eliminates a race where MNT_UPDATE flag could be lost when nmount() raced against sync(), sync_fsync() or quotactl().
2006-09-26 04:12:49 +00:00
MNT_IUNLOCK(mp);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
out:
Provide the mutual exclusion between the nfs export list modifications and nfs requests processing. Lockmgr lock provides the shared locking for nfs requests, while exclusive mode is used for modifications. The writer starvation is handled by lockmgr too. Reported by: kris, pho, many Based on the submission by: mohan Tested by: pho MFC after: 2 weeks
2008-06-09 10:31:38 +00:00
lockmgr(&mp->mnt_explock, LK_RELEASE, NULL);
When exiting vfs_export(), delete the "export" option from the mount options list with vfs_deleteopt(). At this point, the export information is saved in mp->mnt_export, so we can delete the "export" mount option from mp->mnt_optnew and mp->mnt_opt. This fixes read-write/read-only update mounts (mount -u -o rw, mount -u -o ro) of NFS exported directories. For some reason, I could only reproduce the problem with a configuration supplied by Andre: - "options QUOTA" enabled in kernel config - "/ -maproot=root 10.0.1.105" in /etc/exports Reported by: kris, Andre Guibert de Bruet <andy siliconlandmark com>, Andrzej Tobola <ato iem pw edu pl> Tested by: Andre Guibert de Bruet
2007-01-23 06:19:16 +00:00
/*
* Once we have executed the vfs_export() command, we do
* not want to keep the "export" option around in the
* options list, since that will cause subsequent MNT_UPDATE
* calls to fail. The export information is saved in
* mp->mnt_export, so we can safely delete the "export" mount option
* here.
*/
vfs_deleteopt(mp->mnt_optnew, "export");
vfs_deleteopt(mp->mnt_opt, "export");
return (error);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
}
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
/*
* Set the publicly exported filesystem (WebNFS). Currently, only
* one public filesystem is possible in the spec (RFC 2054 and 2055)
*/
int
Convert to ANSI-style function prototypes.
2006-12-16 12:06:59 +00:00
vfs_setpublicfs(struct mount *mp, struct netexport *nep,
struct export_args *argp)
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
{
int error;
struct vnode *rvp;
char *cp;
/*
* mp == NULL -> invalidate the current info, the FS is
* no longer exported. May be called from either vfs_export
* or unmount, so check if it hasn't already been done.
*/
if (mp == NULL) {
if (nfs_pub.np_valid) {
nfs_pub.np_valid = 0;
if (nfs_pub.np_index != NULL) {
Retire the MALLOC and FREE macros. They are an abomination unto style(9). MFC after: 3 months
2008-10-23 15:53:51 +00:00
free(nfs_pub.np_index, M_TEMP);
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
nfs_pub.np_index = NULL;
}
}
return (0);
}
/*
* Only one allowed at a time.
*/
if (nfs_pub.np_valid != 0 && mp != nfs_pub.np_mount)
return (EBUSY);
/*
* Get real filehandle for root of exported FS.
*/
nuke caddr_t.
2002-06-28 23:17:36 +00:00
bzero(&nfs_pub.np_handle, sizeof(nfs_pub.np_handle));
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
nfs_pub.np_handle.fh_fsid = mp->mnt_stat.f_fsid;
Remove the thread argument from the FSD (File-System Dependent) parts of the VFS. Now all the VFS_* functions and relating parts don't want the context as long as it always refers to curthread. In some points, in particular when dealing with VOPs and functions living in the same namespace (eg. vflush) which still need to be converted, pass curthread explicitly in order to retain the old behaviour. Such loose ends will be fixed ASAP. While here fix a bug: now, UFS_EXTATTR can be compiled alone without the UFS_EXTATTR_AUTOSTART option. VFS KPI is heavilly changed by this commit so thirdy parts modules needs to be recompiled. Bump __FreeBSD_version in order to signal such situation.
2009-05-11 15:33:26 +00:00
if ((error = VFS_ROOT(mp, LK_EXCLUSIVE, &rvp)))
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
return (error);
Move vnode-to-file-handle translation from vfs_vptofh to vop_vptofh method. This way we may support multiple structures in v_data vnode field within one file system without using black magic. Vnode-to-file-handle should be VOP in the first place, but was made VFS operation to keep interface as compatible as possible with SUN's VFS. BTW. Now Solaris also implements vnode-to-file-handle as VOP operation. VFS_VPTOFH() was left for API backward compatibility, but is marked for removal before 8.0-RELEASE. Approved by: mckusick Discussed with: many (on IRC) Tested with: ufs, msdosfs, cd9660, nullfs and zfs
2007-02-15 22:08:35 +00:00
if ((error = VOP_VPTOFH(rvp, &nfs_pub.np_handle.fh_fid)))
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
return (error);
vput(rvp);
/*
* If an indexfile was specified, pull it in.
*/
if (argp->ex_indexfile != NULL) {
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
if (nfs_pub.np_index != NULL)
nfs_pub.np_index = malloc(MAXNAMLEN + 1, M_TEMP,
M_WAITOK);
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
error = copyinstr(argp->ex_indexfile, nfs_pub.np_index,
MAXNAMLEN, (size_t *)0);
if (!error) {
/*
* Check for illegal filenames.
*/
for (cp = nfs_pub.np_index; *cp; cp++) {
if (*cp == '/') {
error = EINVAL;
break;
}
}
}
if (error) {
Retire the MALLOC and FREE macros. They are an abomination unto style(9). MFC after: 3 months
2008-10-23 15:53:51 +00:00
free(nfs_pub.np_index, M_TEMP);
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
nfs_pub.np_index = NULL;
Merge WebNFS support from NetBSD Obtained from: NetBSD
1997-07-17 07:17:33 +00:00
return (error);
}
}
nfs_pub.np_mount = mp;
nfs_pub.np_valid = 1;
return (0);
}
comment vfs_export functions, requested by: eivind
2000-09-21 15:55:55 +00:00
/*
* Used by the filesystems to determine if a given network address
Correct typo in comment: thier -> their
2008-11-24 19:28:52 +00:00
* (passed in 'nam') is present in their exports list, returns a pointer
comment vfs_export functions, requested by: eivind
2000-09-21 15:55:55 +00:00
* to struct netcred so that the filesystem can examine it for
* access rights (read/write/etc).
*/
Make various mountpoint related functions static.
2005-02-10 12:25:38 +00:00
static struct netcred *
vfs_export_lookup(struct mount *mp, struct sockaddr *nam)
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
{
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
struct netexport *nep;
Remove register keyword from sys/ and ANSIfy prototypes A long long time ago the register keyword told the compiler to store the corresponding variable in a CPU register, but it is not relevant for any compiler used in the FreeBSD world today. ANSIfy related prototypes while here. Reviewed by: cem, jhb Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D10193
2017-05-17 00:34:34 +00:00
struct netcred *np;
struct radix_node_head *rnh;
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
struct sockaddr *saddr;
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
nep = mp->mnt_export;
if (nep == NULL)
return (NULL);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
np = NULL;
if (mp->mnt_flag & MNT_EXPORTED) {
/*
* Lookup in the export list first.
*/
if (nam != NULL) {
Fix all areas of the system (or at least all those in LINT) to avoid storing socket addresses in mbufs. (Socket buffers are the one exception.) A number of kernel APIs needed to get fixed in order to make this happen. Also, fix three protocol families which kept PCBs in mbufs to not malloc them instead. Delete some old compatibility cruft while we're at it, and add some new routines in the in_cksum family.
1997-08-16 19:16:27 +00:00
saddr = nam;
Remove old hack abusing domattach from NFS code. According to IANA RPC uaddr registry, there are no AFs except IPv4 and IPv6, so it's not worth being too abstract here. Remove ne_rtable[AF_MAX+1] and use explicit per-AF radix tries. Use own initialization without relying on domattach code. While I admit that this was one of the rare places in kernel networking code which really was capable of doing multi-AF without any AF-depended code, it is not possible anymore to rely on dom* code. While here, change terrifying "Invalid radix node head, rn:" message, to different non-understandable "netcred already exists for given addr/mask", but less terrifying. Since we know that rn_addaddr() returns NULL if the same record already exists, we should provide more friendly error. MFC after: 1 month
2014-11-05 00:58:01 +00:00
rnh = NULL;
switch (saddr->sa_family) {
case AF_INET:
rnh = nep->ne4;
break;
case AF_INET6:
rnh = nep->ne6;
break;
}
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (rnh != NULL) {
- convert radix node head lock from mutex to rwlock - make radix node head lock not recursive - fix LOR in rtexpunge - fix LOR in rtredirect Reviewed by: sam
2008-12-07 21:15:43 +00:00
RADIX_NODE_HEAD_RLOCK(rnh);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
np = (struct netcred *)
MFP r287070,r287073: split radix implementation and route table structure. There are number of radix consumers in kernel land (pf,ipfw,nfs,route) with different requirements. In fact, first 3 don't have _any_ requirements and first 2 does not use radix locking. On the other hand, routing structure do have these requirements (rnh_gen, multipath, custom to-be-added control plane functions, different locking). Additionally, radix should not known anything about its consumers internals. So, radix code now uses tiny 'struct radix_head' structure along with internal 'struct radix_mask_head' instead of 'struct radix_node_head'. Existing consumers still uses the same 'struct radix_node_head' with slight modifications: they need to pass pointer to (embedded) 'struct radix_head' to all radix callbacks. Routing code now uses new 'struct rib_head' with different locking macro: RADIX_NODE_HEAD prefix was renamed to RIB_ (which stands for routing information base). New net/route_var.h header was added to hold routing subsystem internal data. 'struct rib_head' was placed there. 'struct rtentry' will also be moved there soon.
2016-01-25 06:33:15 +00:00
(*rnh->rnh_matchaddr)(saddr, &rnh->rh);
- convert radix node head lock from mutex to rwlock - make radix node head lock not recursive - fix LOR in rtexpunge - fix LOR in rtredirect Reviewed by: sam
2008-12-07 21:15:43 +00:00
RADIX_NODE_HEAD_RUNLOCK(rnh);
BSD 4.4 Lite Kernel Sources
1994-05-24 10:09:53 +00:00
if (np && np->netc_rnodes->rn_flags & RNF_ROOT)
np = NULL;
}
}
/*
* If no address match, use the default if it exists.
*/
if (np == NULL && mp->mnt_flag & MNT_DEFEXPORTED)
np = &nep->ne_defexported;
}
return (np);
}
Changes to fix the following bugs: 1) Files weren't properly synced on filesystems other than UFS. In some cases, this lead to lost data. Most likely would be noticed on NFS. The fix is to make the VM page sync/object_clean general rather than in each filesystem. 2) Mixing regular and mmaped file I/O on NFS was very broken. It caused chunks of files to end up as zeroes rather than the intended contents. The fix was to fix several race conditions and to kludge up the "b_dirtyoff" and "b_dirtyend" that NFS relies upon - paying attention to page modifications that occurred via the mmapping. Reviewed by: David Greenman Submitted by: John Dyson
1995-05-21 21:39:31 +00:00
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
/*
* XXX: This comment comes from the deprecated ufs_check_export()
* XXX: and may not entirely apply, but lacking something better:
* This is the generic part of fhtovp called after the underlying
* filesystem has validated the file handle.
*
* Verify that a host should have access to a filesystem.
*/
int
Convert to ANSI-style function prototypes.
2006-12-16 12:06:59 +00:00
vfs_stdcheckexp(struct mount *mp, struct sockaddr *nam, int *extflagsp,
Implement support for RPCSEC_GSS authentication to both the NFS client and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
2008-11-03 10:38:00 +00:00
struct ucred **credanonp, int *numsecflavors, int **secflavors)
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
{
struct netcred *np;
Provide the mutual exclusion between the nfs export list modifications and nfs requests processing. Lockmgr lock provides the shared locking for nfs requests, while exclusive mode is used for modifications. The writer starvation is handled by lockmgr too. Reported by: kris, pho, many Based on the submission by: mohan Tested by: pho MFC after: 2 weeks
2008-06-09 10:31:38 +00:00
lockmgr(&mp->mnt_explock, LK_SHARED, NULL);
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
np = vfs_export_lookup(mp, nam);
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
if (np == NULL) {
lockmgr(&mp->mnt_explock, LK_RELEASE, NULL);
*credanonp = NULL;
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
return (EACCES);
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
}
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
*extflagsp = np->netc_exflags;
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
if ((*credanonp = np->netc_anon) != NULL)
crhold(*credanonp);
Implement support for RPCSEC_GSS authentication to both the NFS client and server. This replaces the RPC implementation of the NFS client and server with the newer RPC implementation originally developed (actually ported from the userland sunrpc code) to support the NFS Lock Manager. I have tested this code extensively and I believe it is stable and that performance is at least equal to the legacy RPC implementation. The NFS code currently contains support for both the new RPC implementation and the older legacy implementation inherited from the original NFS codebase. The default is to use the new implementation - add the NFS_LEGACYRPC option to fall back to the old code. When I merge this support back to RELENG_7, I will probably change this so that users have to 'opt in' to get the new code. To use RPCSEC_GSS on either client or server, you must build a kernel which includes the KGSSAPI option and the crypto device. On the userland side, you must build at least a new libc, mountd, mount_nfs and gssd. You must install new versions of /etc/rc.d/gssd and /etc/rc.d/nfsd and add 'gssd_enable=YES' to /etc/rc.conf. As long as gssd is running, you should be able to mount an NFS filesystem from a server that requires RPCSEC_GSS authentication. The mount itself can happen without any kerberos credentials but all access to the filesystem will be denied unless the accessing user has a valid ticket file in the standard place (/tmp/krb5cc_<uid>). There is currently no support for situations where the ticket file is in a different place, such as when the user logged in via SSH and has delegated credentials from that login. This restriction is also present in Solaris and Linux. In theory, we could improve this in future, possibly using Brooks Davis' implementation of variant symlinks. Supporting RPCSEC_GSS on a server is nearly as simple. You must create service creds for the server in the form 'nfs/<fqdn>@<REALM>' and install them in /etc/krb5.keytab. The standard heimdal utility ktutil makes this fairly easy. After the service creds have been created, you can add a '-sec=krb5' option to /etc/exports and restart both mountd and nfsd. The only other difference an administrator should notice is that nfsd doesn't fork to create service threads any more. In normal operation, there will be two nfsd processes, one in userland waiting for TCP connections and one in the kernel handling requests. The latter process will create as many kthreads as required - these should be visible via 'top -H'. The code has some support for varying the number of service threads according to load but initially at least, nfsd uses a fixed number of threads according to the value supplied to its '-n' option. Sponsored by: Isilon Systems MFC after: 1 month
2008-11-03 10:38:00 +00:00
if (numsecflavors)
*numsecflavors = np->netc_numsecflavors;
if (secflavors)
*secflavors = np->netc_secflavors;
Do not embed struct ucred into larger netcred parent structures. Credential might need to hang around longer than its parent and be used outside of mnt_explock scope controlling netcred lifetime. Use separate reference-counted ucred allocated separately instead. While there, extend mnt_explock coverage in vfs_stdexpcheck and clean-up some unused declarations in new NFS code. Reported by: John Hickey PR: kern/133439 Reviewed by: dfr, kib
2009-05-09 18:09:17 +00:00
lockmgr(&mp->mnt_explock, LK_RELEASE, NULL);
Move the netexport structure from the fs-specific mountstructure to struct mount. This makes the "struct netexport *" paramter to the vfs_export and vfs_checkexport interface unneeded. Consequently that all non-stacking filesystems can use vfs_stdcheckexp(). At the same time, make it a pointer to a struct netexport in struct mount, so that we can remove the bogus AF_MAX and #include <net/radix.h> from <sys/mount.h>
2001-04-25 07:07:52 +00:00
return (0);
}
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