2005-04-16 22:20:36 +00:00
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/*
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* DECnet An implementation of the DECnet protocol suite for the LINUX
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* operating system. DECnet is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* DECnet Routing Forwarding Information Base (Glue/Info List)
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*
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* Author: Steve Whitehouse <SteveW@ACM.org>
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*
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*
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* Changes:
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* Alexey Kuznetsov : SMP locking changes
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* Steve Whitehouse : Rewrote it... Well to be more correct, I
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* copied most of it from the ipv4 fib code.
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* Steve Whitehouse : Updated it in style and fixed a few bugs
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* which were fixed in the ipv4 code since
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* this code was copied from it.
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*
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*/
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#include <linux/string.h>
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#include <linux/net.h>
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#include <linux/socket.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
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#include <linux/slab.h>
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2005-04-16 22:20:36 +00:00
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#include <linux/sockios.h>
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#include <linux/init.h>
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#include <linux/skbuff.h>
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <linux/proc_fs.h>
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#include <linux/netdevice.h>
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#include <linux/timer.h>
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#include <linux/spinlock.h>
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2011-07-26 23:09:06 +00:00
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#include <linux/atomic.h>
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2016-12-24 19:46:01 +00:00
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#include <linux/uaccess.h>
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2005-04-16 22:20:36 +00:00
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#include <net/neighbour.h>
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#include <net/dst.h>
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#include <net/flow.h>
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2006-08-09 22:56:46 +00:00
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#include <net/fib_rules.h>
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2005-04-16 22:20:36 +00:00
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#include <net/dn.h>
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#include <net/dn_route.h>
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#include <net/dn_fib.h>
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#include <net/dn_neigh.h>
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#include <net/dn_dev.h>
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2016-07-05 19:12:53 +00:00
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#include <net/nexthop.h>
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2005-04-16 22:20:36 +00:00
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#define RT_MIN_TABLE 1
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#define for_fib_info() { struct dn_fib_info *fi;\
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for(fi = dn_fib_info_list; fi; fi = fi->fib_next)
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#define endfor_fib_info() }
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#define for_nexthops(fi) { int nhsel; const struct dn_fib_nh *nh;\
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for(nhsel = 0, nh = (fi)->fib_nh; nhsel < (fi)->fib_nhs; nh++, nhsel++)
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#define change_nexthops(fi) { int nhsel; struct dn_fib_nh *nh;\
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for(nhsel = 0, nh = (struct dn_fib_nh *)((fi)->fib_nh); nhsel < (fi)->fib_nhs; nh++, nhsel++)
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#define endfor_nexthops(fi) }
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static DEFINE_SPINLOCK(dn_fib_multipath_lock);
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static struct dn_fib_info *dn_fib_info_list;
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2006-08-09 23:00:57 +00:00
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static DEFINE_SPINLOCK(dn_fib_info_lock);
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2005-04-16 22:20:36 +00:00
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static struct
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{
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int error;
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u8 scope;
|
2007-03-25 03:33:27 +00:00
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} dn_fib_props[RTN_MAX+1] = {
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2005-04-16 22:20:36 +00:00
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[RTN_UNSPEC] = { .error = 0, .scope = RT_SCOPE_NOWHERE },
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[RTN_UNICAST] = { .error = 0, .scope = RT_SCOPE_UNIVERSE },
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[RTN_LOCAL] = { .error = 0, .scope = RT_SCOPE_HOST },
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[RTN_BROADCAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
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[RTN_ANYCAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
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[RTN_MULTICAST] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
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[RTN_BLACKHOLE] = { .error = -EINVAL, .scope = RT_SCOPE_UNIVERSE },
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[RTN_UNREACHABLE] = { .error = -EHOSTUNREACH, .scope = RT_SCOPE_UNIVERSE },
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[RTN_PROHIBIT] = { .error = -EACCES, .scope = RT_SCOPE_UNIVERSE },
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[RTN_THROW] = { .error = -EAGAIN, .scope = RT_SCOPE_UNIVERSE },
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[RTN_NAT] = { .error = 0, .scope = RT_SCOPE_NOWHERE },
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[RTN_XRESOLVE] = { .error = -EINVAL, .scope = RT_SCOPE_NOWHERE },
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};
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|
2006-08-15 06:55:20 +00:00
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static int dn_fib_sync_down(__le16 local, struct net_device *dev, int force);
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static int dn_fib_sync_up(struct net_device *dev);
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2005-04-16 22:20:36 +00:00
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void dn_fib_free_info(struct dn_fib_info *fi)
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{
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if (fi->fib_dead == 0) {
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printk(KERN_DEBUG "DECnet: BUG! Attempt to free alive dn_fib_info\n");
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return;
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}
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change_nexthops(fi) {
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if (nh->nh_dev)
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dev_put(nh->nh_dev);
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nh->nh_dev = NULL;
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} endfor_nexthops(fi);
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kfree(fi);
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}
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void dn_fib_release_info(struct dn_fib_info *fi)
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{
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2006-08-09 23:00:57 +00:00
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spin_lock(&dn_fib_info_lock);
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2005-04-16 22:20:36 +00:00
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if (fi && --fi->fib_treeref == 0) {
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if (fi->fib_next)
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fi->fib_next->fib_prev = fi->fib_prev;
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if (fi->fib_prev)
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fi->fib_prev->fib_next = fi->fib_next;
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if (fi == dn_fib_info_list)
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dn_fib_info_list = fi->fib_next;
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fi->fib_dead = 1;
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dn_fib_info_put(fi);
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}
|
2006-08-09 23:00:57 +00:00
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spin_unlock(&dn_fib_info_lock);
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2005-04-16 22:20:36 +00:00
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}
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static inline int dn_fib_nh_comp(const struct dn_fib_info *fi, const struct dn_fib_info *ofi)
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{
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const struct dn_fib_nh *onh = ofi->fib_nh;
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for_nexthops(fi) {
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if (nh->nh_oif != onh->nh_oif ||
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nh->nh_gw != onh->nh_gw ||
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nh->nh_scope != onh->nh_scope ||
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nh->nh_weight != onh->nh_weight ||
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((nh->nh_flags^onh->nh_flags)&~RTNH_F_DEAD))
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return -1;
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onh++;
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} endfor_nexthops(fi);
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return 0;
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}
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static inline struct dn_fib_info *dn_fib_find_info(const struct dn_fib_info *nfi)
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{
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for_fib_info() {
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if (fi->fib_nhs != nfi->fib_nhs)
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continue;
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|
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if (nfi->fib_protocol == fi->fib_protocol &&
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nfi->fib_prefsrc == fi->fib_prefsrc &&
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nfi->fib_priority == fi->fib_priority &&
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memcmp(nfi->fib_metrics, fi->fib_metrics, sizeof(fi->fib_metrics)) == 0 &&
|
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|
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((nfi->fib_flags^fi->fib_flags)&~RTNH_F_DEAD) == 0 &&
|
|
|
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(nfi->fib_nhs == 0 || dn_fib_nh_comp(fi, nfi) == 0))
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return fi;
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|
|
|
} endfor_fib_info();
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|
return NULL;
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|
|
|
}
|
|
|
|
|
2013-03-21 07:45:28 +00:00
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|
|
static int dn_fib_count_nhs(const struct nlattr *attr)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2013-03-21 07:45:28 +00:00
|
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|
struct rtnexthop *nhp = nla_data(attr);
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int nhs = 0, nhlen = nla_len(attr);
|
2005-04-16 22:20:36 +00:00
|
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|
2016-07-05 19:12:53 +00:00
|
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|
while (rtnh_ok(nhp, nhlen)) {
|
2005-04-16 22:20:36 +00:00
|
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nhs++;
|
2016-07-05 19:12:53 +00:00
|
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nhp = rtnh_next(nhp, &nhlen);
|
2005-04-16 22:20:36 +00:00
|
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}
|
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|
2016-07-05 19:12:53 +00:00
|
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/* leftover implies invalid nexthop configuration, discard it */
|
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return nhlen > 0 ? 0 : nhs;
|
2005-04-16 22:20:36 +00:00
|
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|
}
|
|
|
|
|
2013-03-21 07:45:28 +00:00
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|
static int dn_fib_get_nhs(struct dn_fib_info *fi, const struct nlattr *attr,
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|
|
const struct rtmsg *r)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2013-03-21 07:45:28 +00:00
|
|
|
struct rtnexthop *nhp = nla_data(attr);
|
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|
int nhlen = nla_len(attr);
|
2005-04-16 22:20:36 +00:00
|
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|
|
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change_nexthops(fi) {
|
2016-07-05 19:12:53 +00:00
|
|
|
int attrlen;
|
|
|
|
|
|
|
|
if (!rtnh_ok(nhp, nhlen))
|
2005-04-16 22:20:36 +00:00
|
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|
return -EINVAL;
|
|
|
|
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|
|
nh->nh_flags = (r->rtm_flags&~0xFF) | nhp->rtnh_flags;
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|
|
nh->nh_oif = nhp->rtnh_ifindex;
|
|
|
|
nh->nh_weight = nhp->rtnh_hops + 1;
|
|
|
|
|
2016-07-05 19:12:53 +00:00
|
|
|
attrlen = rtnh_attrlen(nhp);
|
|
|
|
if (attrlen > 0) {
|
2013-03-21 07:45:28 +00:00
|
|
|
struct nlattr *gw_attr;
|
|
|
|
|
|
|
|
gw_attr = nla_find((struct nlattr *) (nhp + 1), attrlen, RTA_GATEWAY);
|
|
|
|
nh->nh_gw = gw_attr ? nla_get_le16(gw_attr) : 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
2016-07-05 19:12:53 +00:00
|
|
|
|
|
|
|
nhp = rtnh_next(nhp, &nhlen);
|
2005-04-16 22:20:36 +00:00
|
|
|
} endfor_nexthops(fi);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int dn_fib_check_nh(const struct rtmsg *r, struct dn_fib_info *fi, struct dn_fib_nh *nh)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (nh->nh_gw) {
|
2011-03-12 22:17:10 +00:00
|
|
|
struct flowidn fld;
|
2005-04-16 22:20:36 +00:00
|
|
|
struct dn_fib_res res;
|
|
|
|
|
|
|
|
if (nh->nh_flags&RTNH_F_ONLINK) {
|
|
|
|
struct net_device *dev;
|
|
|
|
|
|
|
|
if (r->rtm_scope >= RT_SCOPE_LINK)
|
|
|
|
return -EINVAL;
|
|
|
|
if (dnet_addr_type(nh->nh_gw) != RTN_UNICAST)
|
|
|
|
return -EINVAL;
|
2007-09-17 18:56:21 +00:00
|
|
|
if ((dev = __dev_get_by_index(&init_net, nh->nh_oif)) == NULL)
|
2005-04-16 22:20:36 +00:00
|
|
|
return -ENODEV;
|
|
|
|
if (!(dev->flags&IFF_UP))
|
|
|
|
return -ENETDOWN;
|
|
|
|
nh->nh_dev = dev;
|
|
|
|
dev_hold(dev);
|
|
|
|
nh->nh_scope = RT_SCOPE_LINK;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-03-12 22:17:10 +00:00
|
|
|
memset(&fld, 0, sizeof(fld));
|
|
|
|
fld.daddr = nh->nh_gw;
|
|
|
|
fld.flowidn_oif = nh->nh_oif;
|
|
|
|
fld.flowidn_scope = r->rtm_scope + 1;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-03-12 22:17:10 +00:00
|
|
|
if (fld.flowidn_scope < RT_SCOPE_LINK)
|
|
|
|
fld.flowidn_scope = RT_SCOPE_LINK;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2011-03-12 22:17:10 +00:00
|
|
|
if ((err = dn_fib_lookup(&fld, &res)) != 0)
|
2005-04-16 22:20:36 +00:00
|
|
|
return err;
|
|
|
|
|
|
|
|
err = -EINVAL;
|
|
|
|
if (res.type != RTN_UNICAST && res.type != RTN_LOCAL)
|
|
|
|
goto out;
|
|
|
|
nh->nh_scope = res.scope;
|
|
|
|
nh->nh_oif = DN_FIB_RES_OIF(res);
|
|
|
|
nh->nh_dev = DN_FIB_RES_DEV(res);
|
|
|
|
if (nh->nh_dev == NULL)
|
|
|
|
goto out;
|
|
|
|
dev_hold(nh->nh_dev);
|
|
|
|
err = -ENETDOWN;
|
|
|
|
if (!(nh->nh_dev->flags & IFF_UP))
|
|
|
|
goto out;
|
|
|
|
err = 0;
|
|
|
|
out:
|
|
|
|
dn_fib_res_put(&res);
|
|
|
|
return err;
|
|
|
|
} else {
|
|
|
|
struct net_device *dev;
|
|
|
|
|
|
|
|
if (nh->nh_flags&(RTNH_F_PERVASIVE|RTNH_F_ONLINK))
|
|
|
|
return -EINVAL;
|
|
|
|
|
2007-09-17 18:56:21 +00:00
|
|
|
dev = __dev_get_by_index(&init_net, nh->nh_oif);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (dev == NULL || dev->dn_ptr == NULL)
|
|
|
|
return -ENODEV;
|
|
|
|
if (!(dev->flags&IFF_UP))
|
|
|
|
return -ENETDOWN;
|
|
|
|
nh->nh_dev = dev;
|
|
|
|
dev_hold(nh->nh_dev);
|
|
|
|
nh->nh_scope = RT_SCOPE_HOST;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, struct nlattr *attrs[],
|
|
|
|
const struct nlmsghdr *nlh, int *errp)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
int err;
|
|
|
|
struct dn_fib_info *fi = NULL;
|
|
|
|
struct dn_fib_info *ofi;
|
|
|
|
int nhs = 1;
|
|
|
|
|
2007-03-25 03:33:27 +00:00
|
|
|
if (r->rtm_type > RTN_MAX)
|
|
|
|
goto err_inval;
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
if (dn_fib_props[r->rtm_type].scope > r->rtm_scope)
|
|
|
|
goto err_inval;
|
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
if (attrs[RTA_MULTIPATH] &&
|
|
|
|
(nhs = dn_fib_count_nhs(attrs[RTA_MULTIPATH])) == 0)
|
|
|
|
goto err_inval;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-07-21 21:51:30 +00:00
|
|
|
fi = kzalloc(sizeof(*fi)+nhs*sizeof(struct dn_fib_nh), GFP_KERNEL);
|
2005-04-16 22:20:36 +00:00
|
|
|
err = -ENOBUFS;
|
|
|
|
if (fi == NULL)
|
|
|
|
goto failure;
|
|
|
|
|
|
|
|
fi->fib_protocol = r->rtm_protocol;
|
|
|
|
fi->fib_nhs = nhs;
|
|
|
|
fi->fib_flags = r->rtm_flags;
|
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
if (attrs[RTA_PRIORITY])
|
|
|
|
fi->fib_priority = nla_get_u32(attrs[RTA_PRIORITY]);
|
|
|
|
|
|
|
|
if (attrs[RTA_METRICS]) {
|
|
|
|
struct nlattr *attr;
|
|
|
|
int rem;
|
2012-04-15 05:58:06 +00:00
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
nla_for_each_nested(attr, attrs[RTA_METRICS], rem) {
|
|
|
|
int type = nla_type(attr);
|
|
|
|
|
|
|
|
if (type) {
|
2015-01-05 22:57:47 +00:00
|
|
|
if (type > RTAX_MAX || type == RTAX_CC_ALGO ||
|
|
|
|
nla_len(attr) < 4)
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_inval;
|
2013-03-21 07:45:28 +00:00
|
|
|
|
|
|
|
fi->fib_metrics[type-1] = nla_get_u32(attr);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
if (attrs[RTA_PREFSRC])
|
|
|
|
fi->fib_prefsrc = nla_get_le16(attrs[RTA_PREFSRC]);
|
|
|
|
|
|
|
|
if (attrs[RTA_MULTIPATH]) {
|
|
|
|
if ((err = dn_fib_get_nhs(fi, attrs[RTA_MULTIPATH], r)) != 0)
|
2005-04-16 22:20:36 +00:00
|
|
|
goto failure;
|
2013-03-21 07:45:28 +00:00
|
|
|
|
|
|
|
if (attrs[RTA_OIF] &&
|
|
|
|
fi->fib_nh->nh_oif != nla_get_u32(attrs[RTA_OIF]))
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_inval;
|
2013-03-21 07:45:28 +00:00
|
|
|
|
|
|
|
if (attrs[RTA_GATEWAY] &&
|
|
|
|
fi->fib_nh->nh_gw != nla_get_le16(attrs[RTA_GATEWAY]))
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_inval;
|
|
|
|
} else {
|
|
|
|
struct dn_fib_nh *nh = fi->fib_nh;
|
2013-03-21 07:45:28 +00:00
|
|
|
|
|
|
|
if (attrs[RTA_OIF])
|
|
|
|
nh->nh_oif = nla_get_u32(attrs[RTA_OIF]);
|
|
|
|
|
|
|
|
if (attrs[RTA_GATEWAY])
|
|
|
|
nh->nh_gw = nla_get_le16(attrs[RTA_GATEWAY]);
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nh->nh_flags = r->rtm_flags;
|
|
|
|
nh->nh_weight = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (r->rtm_type == RTN_NAT) {
|
2013-03-21 07:45:28 +00:00
|
|
|
if (!attrs[RTA_GATEWAY] || nhs != 1 || attrs[RTA_OIF])
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_inval;
|
2013-03-21 07:45:28 +00:00
|
|
|
|
|
|
|
fi->fib_nh->nh_gw = nla_get_le16(attrs[RTA_GATEWAY]);
|
2005-04-16 22:20:36 +00:00
|
|
|
goto link_it;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dn_fib_props[r->rtm_type].error) {
|
2013-03-21 07:45:28 +00:00
|
|
|
if (attrs[RTA_GATEWAY] || attrs[RTA_OIF] || attrs[RTA_MULTIPATH])
|
2005-04-16 22:20:36 +00:00
|
|
|
goto err_inval;
|
2013-03-21 07:45:28 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
goto link_it;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (r->rtm_scope > RT_SCOPE_HOST)
|
|
|
|
goto err_inval;
|
|
|
|
|
|
|
|
if (r->rtm_scope == RT_SCOPE_HOST) {
|
|
|
|
struct dn_fib_nh *nh = fi->fib_nh;
|
|
|
|
|
|
|
|
/* Local address is added */
|
|
|
|
if (nhs != 1 || nh->nh_gw)
|
|
|
|
goto err_inval;
|
|
|
|
nh->nh_scope = RT_SCOPE_NOWHERE;
|
2007-09-17 18:56:21 +00:00
|
|
|
nh->nh_dev = dev_get_by_index(&init_net, fi->fib_nh->nh_oif);
|
2005-04-16 22:20:36 +00:00
|
|
|
err = -ENODEV;
|
|
|
|
if (nh->nh_dev == NULL)
|
|
|
|
goto failure;
|
|
|
|
} else {
|
|
|
|
change_nexthops(fi) {
|
|
|
|
if ((err = dn_fib_check_nh(r, fi, nh)) != 0)
|
|
|
|
goto failure;
|
|
|
|
} endfor_nexthops(fi)
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fi->fib_prefsrc) {
|
2013-03-21 07:45:28 +00:00
|
|
|
if (r->rtm_type != RTN_LOCAL || !attrs[RTA_DST] ||
|
|
|
|
fi->fib_prefsrc != nla_get_le16(attrs[RTA_DST]))
|
2005-04-16 22:20:36 +00:00
|
|
|
if (dnet_addr_type(fi->fib_prefsrc) != RTN_LOCAL)
|
|
|
|
goto err_inval;
|
|
|
|
}
|
|
|
|
|
|
|
|
link_it:
|
|
|
|
if ((ofi = dn_fib_find_info(fi)) != NULL) {
|
|
|
|
fi->fib_dead = 1;
|
|
|
|
dn_fib_free_info(fi);
|
|
|
|
ofi->fib_treeref++;
|
|
|
|
return ofi;
|
|
|
|
}
|
|
|
|
|
|
|
|
fi->fib_treeref++;
|
|
|
|
atomic_inc(&fi->fib_clntref);
|
2006-08-09 23:00:57 +00:00
|
|
|
spin_lock(&dn_fib_info_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
fi->fib_next = dn_fib_info_list;
|
|
|
|
fi->fib_prev = NULL;
|
|
|
|
if (dn_fib_info_list)
|
|
|
|
dn_fib_info_list->fib_prev = fi;
|
|
|
|
dn_fib_info_list = fi;
|
2006-08-09 23:00:57 +00:00
|
|
|
spin_unlock(&dn_fib_info_lock);
|
2005-04-16 22:20:36 +00:00
|
|
|
return fi;
|
|
|
|
|
|
|
|
err_inval:
|
|
|
|
err = -EINVAL;
|
|
|
|
|
|
|
|
failure:
|
|
|
|
*errp = err;
|
|
|
|
if (fi) {
|
|
|
|
fi->fib_dead = 1;
|
|
|
|
dn_fib_free_info(fi);
|
|
|
|
}
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2011-03-12 22:17:10 +00:00
|
|
|
int dn_fib_semantic_match(int type, struct dn_fib_info *fi, const struct flowidn *fld, struct dn_fib_res *res)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
int err = dn_fib_props[type].error;
|
|
|
|
|
|
|
|
if (err == 0) {
|
|
|
|
if (fi->fib_flags & RTNH_F_DEAD)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
res->fi = fi;
|
|
|
|
|
2011-07-01 09:43:03 +00:00
|
|
|
switch (type) {
|
|
|
|
case RTN_NAT:
|
|
|
|
DN_FIB_RES_RESET(*res);
|
|
|
|
atomic_inc(&fi->fib_clntref);
|
|
|
|
return 0;
|
|
|
|
case RTN_UNICAST:
|
|
|
|
case RTN_LOCAL:
|
|
|
|
for_nexthops(fi) {
|
|
|
|
if (nh->nh_flags & RTNH_F_DEAD)
|
|
|
|
continue;
|
|
|
|
if (!fld->flowidn_oif ||
|
|
|
|
fld->flowidn_oif == nh->nh_oif)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (nhsel < fi->fib_nhs) {
|
|
|
|
res->nh_sel = nhsel;
|
2005-04-16 22:20:36 +00:00
|
|
|
atomic_inc(&fi->fib_clntref);
|
|
|
|
return 0;
|
2011-07-01 09:43:03 +00:00
|
|
|
}
|
|
|
|
endfor_nexthops(fi);
|
|
|
|
res->fi = NULL;
|
|
|
|
return 1;
|
|
|
|
default:
|
2012-05-13 21:56:26 +00:00
|
|
|
net_err_ratelimited("DECnet: impossible routing event : dn_fib_semantic_match type=%d\n",
|
|
|
|
type);
|
2011-07-01 09:43:03 +00:00
|
|
|
res->fi = NULL;
|
|
|
|
return -EINVAL;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2011-03-12 22:17:10 +00:00
|
|
|
void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct dn_fib_info *fi = res->fi;
|
|
|
|
int w;
|
|
|
|
|
|
|
|
spin_lock_bh(&dn_fib_multipath_lock);
|
|
|
|
if (fi->fib_power <= 0) {
|
|
|
|
int power = 0;
|
|
|
|
change_nexthops(fi) {
|
|
|
|
if (!(nh->nh_flags&RTNH_F_DEAD)) {
|
|
|
|
power += nh->nh_weight;
|
|
|
|
nh->nh_power = nh->nh_weight;
|
|
|
|
}
|
|
|
|
} endfor_nexthops(fi);
|
|
|
|
fi->fib_power = power;
|
|
|
|
if (power < 0) {
|
|
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
|
|
|
res->nh_sel = 0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
w = jiffies % fi->fib_power;
|
|
|
|
|
|
|
|
change_nexthops(fi) {
|
|
|
|
if (!(nh->nh_flags&RTNH_F_DEAD) && nh->nh_power) {
|
|
|
|
if ((w -= nh->nh_power) <= 0) {
|
|
|
|
nh->nh_power--;
|
|
|
|
fi->fib_power--;
|
|
|
|
res->nh_sel = nhsel;
|
|
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} endfor_nexthops(fi);
|
|
|
|
res->nh_sel = 0;
|
|
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
|
|
|
}
|
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
static inline u32 rtm_get_table(struct nlattr *attrs[], u8 table)
|
2012-06-26 23:36:16 +00:00
|
|
|
{
|
2013-03-21 07:45:28 +00:00
|
|
|
if (attrs[RTA_TABLE])
|
|
|
|
table = nla_get_u32(attrs[RTA_TABLE]);
|
2012-06-26 23:36:16 +00:00
|
|
|
|
|
|
|
return table;
|
|
|
|
}
|
|
|
|
|
2013-03-21 07:45:29 +00:00
|
|
|
static int dn_fib_rtm_delroute(struct sk_buff *skb, struct nlmsghdr *nlh)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-03-25 17:26:21 +00:00
|
|
|
struct net *net = sock_net(skb->sk);
|
2005-04-16 22:20:36 +00:00
|
|
|
struct dn_fib_table *tb;
|
2013-03-21 07:45:28 +00:00
|
|
|
struct rtmsg *r = nlmsg_data(nlh);
|
|
|
|
struct nlattr *attrs[RTA_MAX+1];
|
|
|
|
int err;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2014-04-23 21:29:27 +00:00
|
|
|
if (!netlink_capable(skb, CAP_NET_ADMIN))
|
2012-11-16 03:03:00 +00:00
|
|
|
return -EPERM;
|
|
|
|
|
2009-11-25 23:14:13 +00:00
|
|
|
if (!net_eq(net, &init_net))
|
2007-11-30 13:21:31 +00:00
|
|
|
return -EINVAL;
|
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
err = nlmsg_parse(nlh, sizeof(*r), attrs, RTA_MAX, rtm_dn_policy);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
tb = dn_fib_get_table(rtm_get_table(attrs, r->rtm_table), 0);
|
|
|
|
if (!tb)
|
|
|
|
return -ESRCH;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
return tb->delete(tb, r, attrs, nlh, &NETLINK_CB(skb));
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2013-03-21 07:45:29 +00:00
|
|
|
static int dn_fib_rtm_newroute(struct sk_buff *skb, struct nlmsghdr *nlh)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2008-03-25 17:26:21 +00:00
|
|
|
struct net *net = sock_net(skb->sk);
|
2005-04-16 22:20:36 +00:00
|
|
|
struct dn_fib_table *tb;
|
2013-03-21 07:45:28 +00:00
|
|
|
struct rtmsg *r = nlmsg_data(nlh);
|
|
|
|
struct nlattr *attrs[RTA_MAX+1];
|
|
|
|
int err;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2014-04-23 21:29:27 +00:00
|
|
|
if (!netlink_capable(skb, CAP_NET_ADMIN))
|
2012-11-16 03:03:00 +00:00
|
|
|
return -EPERM;
|
|
|
|
|
2009-11-25 23:14:13 +00:00
|
|
|
if (!net_eq(net, &init_net))
|
2007-11-30 13:21:31 +00:00
|
|
|
return -EINVAL;
|
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
err = nlmsg_parse(nlh, sizeof(*r), attrs, RTA_MAX, rtm_dn_policy);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
tb = dn_fib_get_table(rtm_get_table(attrs, r->rtm_table), 1);
|
|
|
|
if (!tb)
|
|
|
|
return -ENOBUFS;
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2013-03-21 07:45:28 +00:00
|
|
|
return tb->insert(tb, r, attrs, nlh, &NETLINK_CB(skb));
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
2006-03-21 06:42:39 +00:00
|
|
|
static void fib_magic(int cmd, int type, __le16 dst, int dst_len, struct dn_ifaddr *ifa)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
|
|
|
struct dn_fib_table *tb;
|
|
|
|
struct {
|
|
|
|
struct nlmsghdr nlh;
|
|
|
|
struct rtmsg rtm;
|
|
|
|
} req;
|
2013-03-21 07:45:28 +00:00
|
|
|
struct {
|
|
|
|
struct nlattr hdr;
|
|
|
|
__le16 dst;
|
|
|
|
} dst_attr = {
|
|
|
|
.dst = dst,
|
|
|
|
};
|
|
|
|
struct {
|
|
|
|
struct nlattr hdr;
|
|
|
|
__le16 prefsrc;
|
|
|
|
} prefsrc_attr = {
|
|
|
|
.prefsrc = ifa->ifa_local,
|
|
|
|
};
|
|
|
|
struct {
|
|
|
|
struct nlattr hdr;
|
|
|
|
u32 oif;
|
|
|
|
} oif_attr = {
|
|
|
|
.oif = ifa->ifa_dev->dev->ifindex,
|
|
|
|
};
|
|
|
|
struct nlattr *attrs[RTA_MAX+1] = {
|
|
|
|
[RTA_DST] = (struct nlattr *) &dst_attr,
|
|
|
|
[RTA_PREFSRC] = (struct nlattr * ) &prefsrc_attr,
|
|
|
|
[RTA_OIF] = (struct nlattr *) &oif_attr,
|
|
|
|
};
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
memset(&req.rtm, 0, sizeof(req.rtm));
|
|
|
|
|
|
|
|
if (type == RTN_UNICAST)
|
|
|
|
tb = dn_fib_get_table(RT_MIN_TABLE, 1);
|
|
|
|
else
|
|
|
|
tb = dn_fib_get_table(RT_TABLE_LOCAL, 1);
|
|
|
|
|
|
|
|
if (tb == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
req.nlh.nlmsg_len = sizeof(req);
|
|
|
|
req.nlh.nlmsg_type = cmd;
|
|
|
|
req.nlh.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_APPEND;
|
|
|
|
req.nlh.nlmsg_pid = 0;
|
|
|
|
req.nlh.nlmsg_seq = 0;
|
|
|
|
|
|
|
|
req.rtm.rtm_dst_len = dst_len;
|
|
|
|
req.rtm.rtm_table = tb->n;
|
|
|
|
req.rtm.rtm_protocol = RTPROT_KERNEL;
|
|
|
|
req.rtm.rtm_scope = (type != RTN_LOCAL ? RT_SCOPE_LINK : RT_SCOPE_HOST);
|
|
|
|
req.rtm.rtm_type = type;
|
|
|
|
|
|
|
|
if (cmd == RTM_NEWROUTE)
|
2013-03-21 07:45:28 +00:00
|
|
|
tb->insert(tb, &req.rtm, attrs, &req.nlh, NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
else
|
2013-03-21 07:45:28 +00:00
|
|
|
tb->delete(tb, &req.rtm, attrs, &req.nlh, NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void dn_fib_add_ifaddr(struct dn_ifaddr *ifa)
|
|
|
|
{
|
|
|
|
|
|
|
|
fib_magic(RTM_NEWROUTE, RTN_LOCAL, ifa->ifa_local, 16, ifa);
|
|
|
|
|
|
|
|
#if 0
|
|
|
|
if (!(dev->flags&IFF_UP))
|
|
|
|
return;
|
|
|
|
/* In the future, we will want to add default routes here */
|
|
|
|
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dn_fib_del_ifaddr(struct dn_ifaddr *ifa)
|
|
|
|
{
|
|
|
|
int found_it = 0;
|
|
|
|
struct net_device *dev;
|
|
|
|
struct dn_dev *dn_db;
|
|
|
|
struct dn_ifaddr *ifa2;
|
|
|
|
|
|
|
|
ASSERT_RTNL();
|
|
|
|
|
|
|
|
/* Scan device list */
|
2009-11-04 13:43:23 +00:00
|
|
|
rcu_read_lock();
|
|
|
|
for_each_netdev_rcu(&init_net, dev) {
|
2010-10-29 03:09:24 +00:00
|
|
|
dn_db = rcu_dereference(dev->dn_ptr);
|
2005-04-16 22:20:36 +00:00
|
|
|
if (dn_db == NULL)
|
|
|
|
continue;
|
2010-10-29 03:09:24 +00:00
|
|
|
for (ifa2 = rcu_dereference(dn_db->ifa_list);
|
|
|
|
ifa2 != NULL;
|
|
|
|
ifa2 = rcu_dereference(ifa2->ifa_next)) {
|
2005-04-16 22:20:36 +00:00
|
|
|
if (ifa2->ifa_local == ifa->ifa_local) {
|
|
|
|
found_it = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2009-11-04 13:43:23 +00:00
|
|
|
rcu_read_unlock();
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
if (found_it == 0) {
|
|
|
|
fib_magic(RTM_DELROUTE, RTN_LOCAL, ifa->ifa_local, 16, ifa);
|
|
|
|
|
|
|
|
if (dnet_addr_type(ifa->ifa_local) != RTN_LOCAL) {
|
|
|
|
if (dn_fib_sync_down(ifa->ifa_local, NULL, 0))
|
|
|
|
dn_fib_flush();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void dn_fib_disable_addr(struct net_device *dev, int force)
|
|
|
|
{
|
|
|
|
if (dn_fib_sync_down(0, dev, force))
|
|
|
|
dn_fib_flush();
|
|
|
|
dn_rt_cache_flush(0);
|
|
|
|
neigh_ifdown(&dn_neigh_table, dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int dn_fib_dnaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
|
|
|
|
{
|
|
|
|
struct dn_ifaddr *ifa = (struct dn_ifaddr *)ptr;
|
|
|
|
|
2011-07-01 09:43:03 +00:00
|
|
|
switch (event) {
|
|
|
|
case NETDEV_UP:
|
|
|
|
dn_fib_add_ifaddr(ifa);
|
|
|
|
dn_fib_sync_up(ifa->ifa_dev->dev);
|
|
|
|
dn_rt_cache_flush(-1);
|
|
|
|
break;
|
|
|
|
case NETDEV_DOWN:
|
|
|
|
dn_fib_del_ifaddr(ifa);
|
|
|
|
if (ifa->ifa_dev && ifa->ifa_dev->ifa_list == NULL) {
|
|
|
|
dn_fib_disable_addr(ifa->ifa_dev->dev, 1);
|
|
|
|
} else {
|
2005-04-16 22:20:36 +00:00
|
|
|
dn_rt_cache_flush(-1);
|
2011-07-01 09:43:03 +00:00
|
|
|
}
|
|
|
|
break;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
|
|
}
|
|
|
|
|
2006-08-15 06:55:20 +00:00
|
|
|
static int dn_fib_sync_down(__le16 local, struct net_device *dev, int force)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-02-09 14:24:40 +00:00
|
|
|
int ret = 0;
|
|
|
|
int scope = RT_SCOPE_NOWHERE;
|
|
|
|
|
|
|
|
if (force)
|
|
|
|
scope = -1;
|
|
|
|
|
|
|
|
for_fib_info() {
|
|
|
|
/*
|
|
|
|
* This makes no sense for DECnet.... we will almost
|
|
|
|
* certainly have more than one local address the same
|
|
|
|
* over all our interfaces. It needs thinking about
|
|
|
|
* some more.
|
|
|
|
*/
|
|
|
|
if (local && fi->fib_prefsrc == local) {
|
|
|
|
fi->fib_flags |= RTNH_F_DEAD;
|
|
|
|
ret++;
|
|
|
|
} else if (dev && fi->fib_nhs) {
|
|
|
|
int dead = 0;
|
|
|
|
|
|
|
|
change_nexthops(fi) {
|
|
|
|
if (nh->nh_flags&RTNH_F_DEAD)
|
|
|
|
dead++;
|
|
|
|
else if (nh->nh_dev == dev &&
|
|
|
|
nh->nh_scope != scope) {
|
2005-04-16 22:20:36 +00:00
|
|
|
spin_lock_bh(&dn_fib_multipath_lock);
|
2007-02-09 14:24:40 +00:00
|
|
|
nh->nh_flags |= RTNH_F_DEAD;
|
|
|
|
fi->fib_power -= nh->nh_power;
|
|
|
|
nh->nh_power = 0;
|
2005-04-16 22:20:36 +00:00
|
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
2007-02-09 14:24:40 +00:00
|
|
|
dead++;
|
|
|
|
}
|
|
|
|
} endfor_nexthops(fi)
|
|
|
|
if (dead == fi->fib_nhs) {
|
|
|
|
fi->fib_flags |= RTNH_F_DEAD;
|
|
|
|
ret++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} endfor_fib_info();
|
|
|
|
return ret;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
2006-08-15 06:55:20 +00:00
|
|
|
static int dn_fib_sync_up(struct net_device *dev)
|
2005-04-16 22:20:36 +00:00
|
|
|
{
|
2007-02-09 14:24:40 +00:00
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
if (!(dev->flags&IFF_UP))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
for_fib_info() {
|
|
|
|
int alive = 0;
|
|
|
|
|
|
|
|
change_nexthops(fi) {
|
|
|
|
if (!(nh->nh_flags&RTNH_F_DEAD)) {
|
|
|
|
alive++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (nh->nh_dev == NULL || !(nh->nh_dev->flags&IFF_UP))
|
|
|
|
continue;
|
|
|
|
if (nh->nh_dev != dev || dev->dn_ptr == NULL)
|
|
|
|
continue;
|
|
|
|
alive++;
|
2005-04-16 22:20:36 +00:00
|
|
|
spin_lock_bh(&dn_fib_multipath_lock);
|
2007-02-09 14:24:40 +00:00
|
|
|
nh->nh_power = 0;
|
|
|
|
nh->nh_flags &= ~RTNH_F_DEAD;
|
2005-04-16 22:20:36 +00:00
|
|
|
spin_unlock_bh(&dn_fib_multipath_lock);
|
2007-02-09 14:24:40 +00:00
|
|
|
} endfor_nexthops(fi);
|
|
|
|
|
|
|
|
if (alive > 0) {
|
|
|
|
fi->fib_flags &= ~RTNH_F_DEAD;
|
|
|
|
ret++;
|
|
|
|
}
|
|
|
|
} endfor_fib_info();
|
|
|
|
return ret;
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static struct notifier_block dn_fib_dnaddr_notifier = {
|
|
|
|
.notifier_call = dn_fib_dnaddr_event,
|
|
|
|
};
|
|
|
|
|
|
|
|
void __exit dn_fib_cleanup(void)
|
|
|
|
{
|
|
|
|
dn_fib_table_cleanup();
|
|
|
|
dn_fib_rules_cleanup();
|
|
|
|
|
|
|
|
unregister_dnaddr_notifier(&dn_fib_dnaddr_notifier);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
void __init dn_fib_init(void)
|
|
|
|
{
|
|
|
|
dn_fib_table_init();
|
|
|
|
dn_fib_rules_init();
|
|
|
|
|
|
|
|
register_dnaddr_notifier(&dn_fib_dnaddr_notifier);
|
2007-03-22 18:57:46 +00:00
|
|
|
|
2011-06-10 01:27:09 +00:00
|
|
|
rtnl_register(PF_DECnet, RTM_NEWROUTE, dn_fib_rtm_newroute, NULL, NULL);
|
|
|
|
rtnl_register(PF_DECnet, RTM_DELROUTE, dn_fib_rtm_delroute, NULL, NULL);
|
2005-04-16 22:20:36 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|