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* [XFRM]: Algorithm lookup using .compat nameMartin Willi2006-12-311-1/+2
| | | | | | | | | | | Installing an IPsec SA using old algorithm names (.compat) does not work if the algorithm is not already loaded. When not using the PF_KEY interface, algorithms are not preloaded in xfrm_probe_algs() and installing a IPsec SA fails. Signed-off-by: Martin Willi <martin@strongswan.org> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2006-12-074-50/+219
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: (48 commits) [NETFILTER]: Fix non-ANSI func. decl. [TG3]: Identify Serdes devices more clearly. [TG3]: Use msleep. [TG3]: Use netif_msg_*. [TG3]: Allow partial speed advertisement. [TG3]: Add TG3_FLG2_IS_NIC flag. [TG3]: Add 5787F device ID. [TG3]: Fix Phy loopback. [WANROUTER]: Kill kmalloc debugging code. [TCP] inet_twdr_hangman: Delete unnecessary memory barrier(). [NET]: Memory barrier cleanups [IPSEC]: Fix inetpeer leak in ipv4 xfrm dst entries. audit: disable ipsec auditing when CONFIG_AUDITSYSCALL=n audit: Add auditing to ipsec [IRDA] irlan: Fix compile warning when CONFIG_PROC_FS=n [IrDA]: Incorrect TTP header reservation [IrDA]: PXA FIR code device model conversion [GENETLINK]: Fix misplaced command flags. [NETLIK]: Add a pointer to the Generic Netlink wiki page. [IPV6] RAW: Don't release unlocked sock. ...
| * audit: disable ipsec auditing when CONFIG_AUDITSYSCALL=nJoy Latten2006-12-062-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | Disables auditing in ipsec when CONFIG_AUDITSYSCALL is disabled in the kernel. Also includes a bug fix for xfrm_state.c as a result of original ipsec audit patch. Signed-off-by: Joy Latten <latten@austin.ibm.com> Signed-off-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * audit: Add auditing to ipsecJoy Latten2006-12-063-6/+164
| | | | | | | | | | | | | | | | | | An audit message occurs when an ipsec SA or ipsec policy is created/deleted. Signed-off-by: Joy Latten <latten@austin.ibm.com> Signed-off-by: James Morris <jmorris@namei.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [IPSEC]: Add support for AES-XCBC-MACKazunori MIYAZAWA2006-12-061-0/+17
| | | | | | | | | | | | | | The glue of xfrm. Signed-off-by: Kazunori MIYAZAWA <miyazawa@linux-ipv6.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| * [XFRM] Optimize SA dumpingJamal Hadi Salim2006-12-061-13/+11
| | | | | | | | | | | | Same comments as in "[XFRM] Optimize policy dumping" The numbers are (20K SAs):
| * [XFRM] Optimize policy dumpingJamal Hadi Salim2006-12-061-30/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change optimizes the dumping of Security policies. 1) Before this change .. speedopolis:~# time ./ip xf pol real 0m22.274s user 0m0.000s sys 0m22.269s 2) Turn off sub-policies speedopolis:~# ./ip xf pol real 0m13.496s user 0m0.000s sys 0m13.493s i suppose the above is to be expected 3) With this change .. speedopolis:~# time ./ip x policy real 0m7.901s user 0m0.008s sys 0m7.896s
* | [PATCH] slab: remove kmem_cache_tChristoph Lameter2006-12-072-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace all uses of kmem_cache_t with struct kmem_cache. The patch was generated using the following script: #!/bin/sh # # Replace one string by another in all the kernel sources. # set -e for file in `find * -name "*.c" -o -name "*.h"|xargs grep -l $1`; do quilt add $file sed -e "1,\$s/$1/$2/g" $file >/tmp/$$ mv /tmp/$$ $file quilt refresh done The script was run like this sh replace kmem_cache_t "struct kmem_cache" Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] slab: remove SLAB_ATOMICChristoph Lameter2006-12-071-1/+1
|/ | | | | | | | SLAB_ATOMIC is an alias of GFP_ATOMIC Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'master' of ↵David Howells2006-12-051-8/+42
|\ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: drivers/ata/libata-scsi.c include/linux/libata.h Futher merge of Linus's head and compilation fixups. Signed-Off-By: David Howells <dhowells@redhat.com>
| * [XFRM] xfrm_user: Better validation of user templates.David S. Miller2006-12-031-8/+42
| | | | | | | | | | | | | | | | | | | | | | Since we never checked the ->family value of templates before, many applications simply leave it at zero. Detect this and fix it up to be the pol->family value. Also, do not clobber xp->family while reading in templates, that is not necessary. Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'master' of ↵David Howells2006-12-053-35/+63
|\ \ | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 Conflicts: drivers/infiniband/core/iwcm.c drivers/net/chelsio/cxgb2.c drivers/net/wireless/bcm43xx/bcm43xx_main.c drivers/net/wireless/prism54/islpci_eth.c drivers/usb/core/hub.h drivers/usb/input/hid-core.c net/core/netpoll.c Fix up merge failures with Linus's head and fix new compilation failures. Signed-Off-By: David Howells <dhowells@redhat.com>
| * [XFRM]: Fix aevent structuring to be more complete.Jamal Hadi Salim2006-12-021-1/+3
| | | | | | | | | | | | | | | | | | aevents can not uniquely identify an SA. We break the ABI with this patch, but consensus is that since it is not yet utilized by any (known) application then it is fine (better do it now than later). Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [IPSEC]: Add netlink interface for the encapsulation family.Miika Komu2006-12-021-1/+3
| | | | | | | | | | | | | | Signed-off-by: Miika Komu <miika@iki.fi> Signed-off-by: Diego Beltrami <Diego.Beltrami@hiit.fi> Signed-off-by: Kazunori Miyazawa <miyazawa@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [IPSEC]: Add encapsulation family.Miika Komu2006-12-021-0/+1
| | | | | | | | | | | | | | Signed-off-by: Miika Komu <miika@iki.fi> Signed-off-by: Diego Beltrami <Diego.Beltrami@hiit.fi> Signed-off-by: Kazunori Miyazawa <miyazawa@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [XFRM]: Convert a few __u8 to proper u8Jamal Hadi Salim2006-12-021-8/+8
| | | | | | | | | | | | | | Caught by the EyeBalls(tm) of Thomas Graf Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [XFRM]: Make flush notifier prettier when subpolicy usedJamal Hadi Salim2006-12-021-10/+2
| | | | | | | | | | | | | | Might as well make flush notifier prettier when subpolicy used Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [NETLINK]: Remove unused dst_pid field in netlink_skb_parmsThomas Graf2006-12-021-2/+0
| | | | | | | | | | | | | | | | The destination PID is passed directly to netlink_unicast() respectively netlink_multicast(). Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [XFRM]: Use kmemdup where appropriateArnaldo Carvalho de Melo2006-12-021-6/+3
| | | | | | | | Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| * [XFRM]: Make copy_to_user_policy_type take a typeJamal Hadi Salim2006-12-021-7/+7
| | | | | | | | | | | | | | | | Make copy_to_user_policy_type take a type instead a policy and fix its users to pass the type Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [XFRM]: uninline xfrm_selector_match()Andrew Morton2006-12-021-0/+34
| | | | | | | | | | | | | | Six callsites, huge. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * SELinux: Fix SA selection semanticsVenkat Yekkirala2006-12-021-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the selection of an SA for an outgoing packet to be at the same context as the originating socket/flow. This eliminates the SELinux policy's ability to use/sendto SAs with contexts other than the socket's. With this patch applied, the SELinux policy will require one or more of the following for a socket to be able to communicate with/without SAs: 1. To enable a socket to communicate without using labeled-IPSec SAs: allow socket_t unlabeled_t:association { sendto recvfrom } 2. To enable a socket to communicate with labeled-IPSec SAs: allow socket_t self:association { sendto }; allow socket_t peer_sa_t:association { recvfrom }; Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com> Signed-off-by: James Morris <jmorris@namei.org>
| * [XFRM]: annotate ->new_mapping()Al Viro2006-12-021-1/+1
| | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
| * [XFRM] STATE: Fix to respond error to get operation if no matching entry exists.Masahide NAKAMURA2006-11-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When application uses XFRM_MSG_GETSA to get state entry through netlink socket and kernel has no matching one, the application expects reply message with error status by kernel. Kernel doesn't send the message back in the case of Mobile IPv6 route optimization protocols (i.e. routing header or destination options header). This is caused by incorrect return code "0" from net/xfrm/xfrm_user.c(xfrm_user_state_lookup) and it makes kernel skip to acknowledge at net/netlink/af_netlink.c(netlink_rcv_skb). This patch fix to reply ESRCH to application. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: TAKAMIYA Noriaki <takamiya@po.ntts.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
* | WorkStruct: make allyesconfigDavid Howells2006-11-222-8/+8
|/ | | | | | Fix up for make allyesconfig. Signed-Off-By: David Howells <dhowells@redhat.com>
* [XFRM]: nlmsg length not computed correctly in the presence of subpoliciesJamal Hadi Salim2006-11-211-1/+9
| | | | | | | | | | I actually dont have a test case for these; i just found them by inspection. Refer to patch "[XFRM]: Sub-policies broke policy events" for more info Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Acked-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Sub-policies broke policy eventsJamal Hadi Salim2006-11-211-0/+3
| | | | | | | | | | | XFRM policy events are broken when sub-policy feature is turned on. A simple test to verify this: run ip xfrm mon on one window and add then delete a policy on another window .. Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Acked-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM] xfrm_user: Fix unaligned accesses.David S. Miller2006-10-301-2/+2
| | | | | | | | | Use memcpy() to move xfrm_address_t objects in and out of netlink messages. The vast majority of xfrm_user was doing this properly, except for copy_from_user_state() and copy_to_user_state(). Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Fix xfrm_state accountingPatrick McHardy2006-10-241-8/+10
| | | | | | | | | xfrm_state_num needs to be increased for XFRM_STATE_ACQ states created by xfrm_state_find() to prevent the counter from going negative when the state is destroyed. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Fix xfrm_state_num going negative.David S. Miller2006-10-151-4/+13
| | | | | | | | | | Missing counter bump when hashing in a new ACQ xfrm_state. Now that we have two spots to do the hash grow check, break it out into a helper function. Signed-off-by: David S. Miller <davem@davemloft.net>
* IPsec: fix handling of errors for socket policiesVenkat Yekkirala2006-10-111-8/+18
| | | | | | | | | | This treats the security errors encountered in the case of socket policy matching, the same as how these are treated in the case of main/sub policies, which is to return a full lookup failure. Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com> Signed-off-by: James Morris <jmorris@namei.org>
* IPsec: correct semantics for SELinux policy matchingVenkat Yekkirala2006-10-112-12/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently when an IPSec policy rule doesn't specify a security context, it is assumed to be "unlabeled" by SELinux, and so the IPSec policy rule fails to match to a flow that it would otherwise match to, unless one has explicitly added an SELinux policy rule allowing the flow to "polmatch" to the "unlabeled" IPSec policy rules. In the absence of such an explicitly added SELinux policy rule, the IPSec policy rule fails to match and so the packet(s) flow in clear text without the otherwise applicable xfrm(s) applied. The above SELinux behavior violates the SELinux security notion of "deny by default" which should actually translate to "encrypt by default" in the above case. This was first reported by Evgeniy Polyakov and the way James Morris was seeing the problem was when connecting via IPsec to a confined service on an SELinux box (vsftpd), which did not have the appropriate SELinux policy permissions to send packets via IPsec. With this patch applied, SELinux "polmatching" of flows Vs. IPSec policy rules will only come into play when there's a explicit context specified for the IPSec policy rule (which also means there's corresponding SELinux policy allowing appropriate domains/flows to polmatch to this context). Secondly, when a security module is loaded (in this case, SELinux), the security_xfrm_policy_lookup() hook can return errors other than access denied, such as -EINVAL. We were not handling that correctly, and in fact inverting the return logic and propagating a false "ok" back up to xfrm_lookup(), which then allowed packets to pass as if they were not associated with an xfrm policy. The solution for this is to first ensure that errno values are correctly propagated all the way back up through the various call chains from security_xfrm_policy_lookup(), and handled correctly. Then, flow_cache_lookup() is modified, so that if the policy resolver fails (typically a permission denied via the security module), the flow cache entry is killed rather than having a null policy assigned (which indicates that the packet can pass freely). This also forces any future lookups for the same flow to consult the security module (e.g. SELinux) for current security policy (rather than, say, caching the error on the flow cache entry). This patch: Fix the selinux side of things. This makes sure SELinux polmatching of flow contexts to IPSec policy rules comes into play only when an explicit context is associated with the IPSec policy rule. Also, this no longer defaults the context of a socket policy to the context of the socket since the "no explicit context" case is now handled properly. Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com> Signed-off-by: James Morris <jmorris@namei.org>
* IPsec: propagate security module errors up from flow_cache_lookupJames Morris2006-10-111-15/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a security module is loaded (in this case, SELinux), the security_xfrm_policy_lookup() hook can return an access denied permission (or other error). We were not handling that correctly, and in fact inverting the return logic and propagating a false "ok" back up to xfrm_lookup(), which then allowed packets to pass as if they were not associated with an xfrm policy. The way I was seeing the problem was when connecting via IPsec to a confined service on an SELinux box (vsftpd), which did not have the appropriate SELinux policy permissions to send packets via IPsec. The first SYNACK would be blocked, because of an uncached lookup via flow_cache_lookup(), which would fail to resolve an xfrm policy because the SELinux policy is checked at that point via the resolver. However, retransmitted SYNACKs would then find a cached flow entry when calling into flow_cache_lookup() with a null xfrm policy, which is interpreted by xfrm_lookup() as the packet not having any associated policy and similarly to the first case, allowing it to pass without transformation. The solution presented here is to first ensure that errno values are correctly propagated all the way back up through the various call chains from security_xfrm_policy_lookup(), and handled correctly. Then, flow_cache_lookup() is modified, so that if the policy resolver fails (typically a permission denied via the security module), the flow cache entry is killed rather than having a null policy assigned (which indicates that the packet can pass freely). This also forces any future lookups for the same flow to consult the security module (e.g. SELinux) for current security policy (rather than, say, caching the error on the flow cache entry). Signed-off-by: James Morris <jmorris@namei.org>
* [XFRM]: BEET modeDiego Beltrami2006-10-041-0/+1
| | | | | | | | | | | | | | | | | This patch introduces the BEET mode (Bound End-to-End Tunnel) with as specified by the ietf draft at the following link: http://www.ietf.org/internet-drafts/draft-nikander-esp-beet-mode-06.txt The patch provides only single family support (i.e. inner family = outer family). Signed-off-by: Diego Beltrami <diego.beltrami@gmail.com> Signed-off-by: Miika Komu <miika@iki.fi> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Abhinav Pathak <abhinav.pathak@hiit.fi> Signed-off-by: Jeff Ahrenholz <ahrenholz@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Clearing xfrm_policy_count[] to zero during flush is incorrect.David S. Miller2006-10-041-2/+5
| | | | | | | | | | | | | When we flush policies, we do a type match so we might not actually delete all policies matching a certain direction. So keep track of how many policies we actually kill and subtract that number from xfrm_policy_count[dir] at the end. Based upon a patch by Masahide NAKAMURA. Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM] STATE: Use destination address for src hash.Masahide NAKAMURA2006-10-042-10/+13
| | | | | | | | | | | | Src hash is introduced for Mobile IPv6 route optimization usage. On current kenrel code it is calculated with source address only. It results we uses the same hash value for outbound state (when the node has only one address for Mobile IPv6). This patch use also destination address as peer information for src hash to be dispersed. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Do not add a state whose SPI is zero to the SPI hash.Masahide NAKAMURA2006-09-281-4/+7
| | | | | | | | | SPI=0 is used for acquired IPsec SA and MIPv6 RO state. Such state should not be added to the SPI hash because we do not care about it on deleting path. Signed-off-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
* [XFRM]: xfrm_spi_hash() annotationsAl Viro2006-09-282-3/+3
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: xfrm_replay_advance() annotationsAl Viro2006-09-281-3/+2
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: xrfm_replay_check() annotationsAl Viro2006-09-281-3/+2
| | | | | | | seq argument is net-endian Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: xfrm_parse_spi() annotationsAl Viro2006-09-281-4/+4
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: xfrm_state_lookup() annotationsAl Viro2006-09-281-2/+2
| | | | | | | spi argument of xfrm_state_lookup() is net-endian Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: xfrm_alloc_spi() annotatedAl Viro2006-09-281-5/+5
| | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Fix wildcard as tunnel sourcePatrick McHardy2006-09-221-0/+21
| | | | | | | | | | Hashing SAs by source address breaks templates with wildcards as tunnel source since the source address used for hashing/lookup is still 0/0. Move source address lookup to xfrm_tmpl_resolve_one() so we can use the real address in the lookup. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: remove xerr_idxp from __xfrm_policy_check()James Morris2006-09-221-7/+6
| | | | | | | | | | | | | It seems that during the MIPv6 respin, some code which was originally conditionally compiled around CONFIG_XFRM_ADVANCED was accidently left in after the config option was removed. This patch removes an extraneous pointer (xerr_idxp) which is no longer needed. Signed-off-by: James Morris <jmorris@namei.org> Acked-by: Masahide NAKAMURA <nakam@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM] STATE: Fix flusing with hash mask.Masahide NAKAMURA2006-09-221-1/+1
| | | | | | | This is a minor fix about transformation state flushing for net-2.6.19. Please apply it. Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Use SLAB_PANICAlexey Dobriyan2006-09-222-6/+2
| | | | | Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Respect priority in policy lookups.David S. Miller2006-09-221-9/+10
| | | | | | | | | | Even if we find an exact match in the hash table, we must inspect the inexact list to look for a match with a better priority. Noticed by Masahide NAKAMURA <nakam@linux-ipv6.org>. Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Extract common hashing code into xfrm_hash.[ch]David S. Miller2006-09-225-200/+195
| | | | Signed-off-by: David S. Miller <davem@davemloft.net>
* [XFRM]: Hash policies when non-prefixed.David S. Miller2006-09-221-140/+541
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This idea is from Alexey Kuznetsov. It is common for policies to be non-prefixed. And for that case we can optimize lookups, insert, etc. quite a bit. For each direction, we have a dynamically sized policy hash table for non-prefixed policies. We also have a hash table on policy->index. For prefixed policies, we have a list per-direction which we will consult on lookups when a non-prefix hashtable lookup fails. This still isn't as efficient as I would like it. There are four immediate problems: 1) Lots of excessive refcounting, which can be fixed just like xfrm_state was 2) We do 2 hash probes on insert, one to look for dups and one to allocate a unique policy->index. Althought I wonder how much this matters since xfrm_state inserts do up to 3 hash probes and that seems to perform fine. 3) xfrm_policy_insert() is very complex because of the priority ordering and entry replacement logic. 4) Lots of counter bumping, in addition to policy refcounts, in the form of xfrm_policy_count[]. This is merely used to let code path(s) know that some IPSEC rules exist. So this count is indexed per-direction, maybe that is overkill. Signed-off-by: David S. Miller <davem@davemloft.net>
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