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2008-08-27sctp: fix random memory dereference with SCTP_HMAC_IDENT option.Vlad Yasevich
The number of identifiers needs to be checked against the option length. Also, the identifier index provided needs to be verified to make sure that it doesn't exceed the bounds of the array. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27sctp: correct bounds check in sctp_setsockopt_auth_keyVlad Yasevich
The bonds check to prevent buffer overlflow was not exactly right. It still allowed overflow of up to 8 bytes which is sizeof(struct sctp_authkey). Since optlen is already checked against the size of that struct, we are guaranteed not to cause interger overflow either. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27Merge branch 'no-iwlwifi' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2008-08-27ipv4: mode 0555 in ipv4_skeletonHugh Dickins
vpnc on today's kernel says Cannot open "/proc/sys/net/ipv4/route/flush": d--------- 0 root root 0 2008-08-26 11:32 /proc/sys/net/ipv4/route d--------- 0 root root 0 2008-08-26 19:16 /proc/sys/net/ipv4/neigh Signed-off-by: Hugh Dickins <hugh@veritas.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27tcp: fix tcp header size miscalculation when window scale is unusedPhilip Love
The size of the TCP header is miscalculated when the window scale ends up being 0. Additionally, this can be induced by sending a SYN to a passive open port with a window scale option with value 0. Signed-off-by: Philip Love <love_phil@emc.com> Signed-off-by: Adam Langley <agl@imperialviolet.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27pkt_sched: Fix gen_estimator locksJarek Poplawski
While passing a qdisc root lock to gen_new_estimator() and gen_replace_estimator() dev could be deactivated or even before grafting proper root qdisc as qdisc_sleeping (e.g. qdisc_create), so using qdisc_root_lock() is not enough. This patch adds qdisc_root_sleeping_lock() for this, plus additional checks, where necessary. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27pkt_sched: Use rcu_assign_pointer() to change dev_queue->qdiscJarek Poplawski
These pointers are RCU protected, so proper primitives should be used. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-27pkt_sched: Fix dev_graft_qdisc() lockingJarek Poplawski
During dev_graft_qdisc() dev is deactivated, so qdisc_root_lock() returns wrong lock of noop_qdisc instead of qdisc_sleeping. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-26mac80211: quiet chatty IBSS merge messageJohn W. Linville
It seems obvious that this #ifndef should be the opposite polarity... Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26mac80211: don't send empty extended rates IEJan-Espen Pettersen
The association request includes a list of supported data rates. 802.11b: 4 supported rates. 802.11g: 12 (8 + 4) supported rates. 802.11a: 8 supported rates. The rates tag of the assoc request has room for only 8 rates. In case of 802.11g an extended rate tag is appended. However in net/wireless/mlme.c an extended (empty) rate tag is also appended if the number of rates is exact 8. This empty (length=0) extended rates tag causes some APs to deny association with code 18 (unsupported rates). These APs include my ZyXEL G-570U, and according to Tomas Winkler som Cisco APs. 'If count == 8' has been used to check for the need for an extended rates tag. But count would also be equal to 8 if the for loop exited because of no more supported rates. Therefore a check for count being less than rates_len would seem more correct. Thanks to: * Dan Williams for newbie guidance * Tomas Winkler for confirming the problem Signed-off-by: Jan-Espen Pettersen <sigsegv@radiotube.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26mac80211: Fix debugfs file add/del for netdevJouni Malinen
Previous version was using incorrect union structures for non-AP interfaces when adding and removing max_ratectrl_rateidx and force_unicast_rateidx entries. Depending on the vif type, this ended up in corrupting debugfs entries since the dentries inside different union structures ended up going being on top of eachother.. As the end result, debugfs files were being left behind with references to freed data (instant kernel oops on access) and directories were not removed properly when unloading mac80211 drivers. This patch fixes those issues by using only a single union structure based on the vif type. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26net/mac80211/mesh.c: correct the argument to __mesh_table_freeJulia Lawall
In the function mesh_table_grow, it is the new table not the argument table that should be freed if the function fails (cf commit bd9b448f4c0a514559bdae4ca18ca3e8cd999c6d) The semantic match that detects this problem is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; expression E,f; position p1,p2,p3; identifier l; statement S; @@ x = mesh_table_alloc@p1(...) ... if (x == NULL) S ... when != E = x when != mesh_table_free(x) goto@p2 l; ... when != E = x when != f(...,x,...) when any ( return \(0\|x\); | return@p3 ...; ) @script:python@ p1 << r.p1; p2 << r.p2; p3 << r.p3; @@ print "%s: call on line %s not freed or saved before return on line %s via line %s" % (p1[0].file,p1[0].line,p3[0].line,p2[0].line) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26mac80211: Use IWEVASSOCREQIE instead of IWEVCUSTOMJouni Malinen
The previous code was using IWEVCUSTOM to report IEs from AssocReq and AssocResp frames into user space. This can easily hit the 256 byte limit (IW_CUSTOM_MAX) with APs that include number of vendor IEs in AssocResp. This results in the event message not being sent and dmesg showing "wlan0 (WE) : Wireless Event too big (366)" type of errors. Convert mac80211 to use IWEVASSOCREQIE/IWEVASSOCRESPIE to avoid the issue of being unable to send association IEs as wireless events. These newer event types use binary encoding and larger maximum size (IW_GENERIC_IE_MAX = 1024), so the likelyhood of not being able to send the IEs is much smaller than with IWEVCUSTOM. As an extra benefit, the code is also quite a bit simpler since there is no need to allocate an extra buffer for hex encoding. Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-26net: rfkill: add missing line breakFelipe Balbi
Trivial patch adding a missing line break on rfkill_claim_show(). Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com> Acked-by: Ivo van Doorn <IvDoorn@gmail.co> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-25ipv6: sysctl fixesAl Viro
Braino: net.ipv6 in ipv6 skeleton has no business in rotable class Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-25ipv4: sysctl fixesAl Viro
net.ipv4.neigh should be a part of skeleton to avoid ordering problems Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-25sctp: add verification checks to SCTP_AUTH_KEY optionVlad Yasevich
The structure used for SCTP_AUTH_KEY option contains a length that needs to be verfied to prevent buffer overflow conditions. Spoted by Eugene Teo <eteo@redhat.com>. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-23ipv6: protocol for address routesStephen Hemminger
This fixes a problem spotted with zebra, but not sure if it is necessary a kernel problem. With IPV6 when an address is added to an interface, Zebra creates a duplicate RIB entry, one as a connected route, and other as a kernel route. When an address is added to an interface the RTN_NEWADDR message causes Zebra to create a connected route. In IPV4 when an address is added to an interface a RTN_NEWROUTE message is set to user space with the protocol RTPROT_KERNEL. Zebra ignores these messages, because it already has the connected route. The problem is that route created in IPV6 has route protocol == RTPROT_BOOT. Was this a design decision or a bug? This fixes it. Same patch applies to both net-2.6 and stable. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-23icmp: icmp_sk() should not use smp_processor_id() in preemptible codeDenis V. Lunev
Pass namespace into icmp_xmit_lock, obtain socket inside and return it as a result for caller. Thanks Alexey Dobryan for this report: Steps to reproduce: CONFIG_PREEMPT=y CONFIG_DEBUG_PREEMPT=y tracepath <something> BUG: using smp_processor_id() in preemptible [00000000] code: tracepath/3205 caller is icmp_sk+0x15/0x30 Pid: 3205, comm: tracepath Not tainted 2.6.27-rc4 #1 Call Trace: [<ffffffff8031af14>] debug_smp_processor_id+0xe4/0xf0 [<ffffffff80409405>] icmp_sk+0x15/0x30 [<ffffffff8040a17b>] icmp_send+0x4b/0x3f0 [<ffffffff8025a415>] ? trace_hardirqs_on_caller+0xd5/0x160 [<ffffffff8025a4ad>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8023a475>] ? local_bh_enable_ip+0x95/0x110 [<ffffffff804285b9>] ? _spin_unlock_bh+0x39/0x40 [<ffffffff8025a26c>] ? mark_held_locks+0x4c/0x90 [<ffffffff8025a4ad>] ? trace_hardirqs_on+0xd/0x10 [<ffffffff8025a415>] ? trace_hardirqs_on_caller+0xd5/0x160 [<ffffffff803e91b4>] ip_fragment+0x8d4/0x900 [<ffffffff803e7030>] ? ip_finish_output2+0x0/0x290 [<ffffffff803e91e0>] ? ip_finish_output+0x0/0x60 [<ffffffff803e6650>] ? dst_output+0x0/0x10 [<ffffffff803e922c>] ip_finish_output+0x4c/0x60 [<ffffffff803e92e3>] ip_output+0xa3/0xf0 [<ffffffff803e68d0>] ip_local_out+0x20/0x30 [<ffffffff803e753f>] ip_push_pending_frames+0x27f/0x400 [<ffffffff80406313>] udp_push_pending_frames+0x233/0x3d0 [<ffffffff804067d1>] udp_sendmsg+0x321/0x6f0 [<ffffffff8040d155>] inet_sendmsg+0x45/0x80 [<ffffffff803b967f>] sock_sendmsg+0xdf/0x110 [<ffffffff8024a100>] ? autoremove_wake_function+0x0/0x40 [<ffffffff80257ce5>] ? validate_chain+0x415/0x1010 [<ffffffff8027dc10>] ? __do_fault+0x140/0x450 [<ffffffff802597d0>] ? __lock_acquire+0x260/0x590 [<ffffffff803b9e55>] ? sockfd_lookup_light+0x45/0x80 [<ffffffff803ba50a>] sys_sendto+0xea/0x120 [<ffffffff80428e42>] ? _spin_unlock_irqrestore+0x42/0x80 [<ffffffff803134bc>] ? __up_read+0x4c/0xb0 [<ffffffff8024e0c6>] ? up_read+0x26/0x30 [<ffffffff8020b8bb>] system_call_fastpath+0x16/0x1b icmp6_sk() is similar. Signed-off-by: Denis V. Lunev <den@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-22pkt_sched: Fix qdisc list lockingJarek Poplawski
Since some qdiscs call qdisc_tree_decrease_qlen() (so qdisc_lookup()) without rtnl_lock(), adding and deleting from a qdisc list needs additional locking. This patch adds global spinlock qdisc_list_lock and wrapper functions for modifying the list. It is considered as a temporary solution until hfsc_dequeue(), netem_dequeue() and tbf_dequeue() (or qdisc_tree_decrease_qlen()) are redone. With feedback from Herbert Xu and David S. Miller. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-21pkt_sched: Fix qdisc_watchdog() vs. dev_deactivate() raceJarek Poplawski
dev_deactivate() can skip rescheduling of a qdisc by qdisc_watchdog() or other timer calling netif_schedule() after dev_queue_deactivate(). We prevent this checking aliveness before scheduling the timer. Since during deactivation the root qdisc is available only as qdisc_sleeping additional accessor qdisc_root_sleeping() is created. With feedback from Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-21sctp: fix potential panics in the SCTP-AUTH API.Vlad Yasevich
All of the SCTP-AUTH socket options could cause a panic if the extension is disabled and the API is envoked. Additionally, there were some additional assumptions that certain pointers would always be valid which may not always be the case. This patch hardens the API and address all of the crash scenarios. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-19pkt_sched: Prevent livelock in TX queue running.David S. Miller
If dev_deactivate() is trying to quiesce the queue, it is theoretically possible for another cpu to livelock trying to process that queue. This happens because dev_deactivate() grabs the queue spinlock as it checks the queue state, whereas net_tx_action() does a trylock and reschedules the qdisc if it hits the lock. This breaks the livelock by adding a check on __QDISC_STATE_DEACTIVATED to net_tx_action() when the trylock fails. Based upon feedback from Herbert Xu and Jarek Poplawski. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-19Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/holtmann/bluetooth-2.6
2008-08-18Revert "pkt_sched: Add BH protection for qdisc_stab_lock."David S. Miller
This reverts commit 1cfa26661a85549063e369e2b40275eeaa7b923c. qdisc_destroy() runs fully under RTNL again and not from softint any longer, so this change is no longer needed. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18Revert "pkt_sched: Protect gen estimators under est_lock."David S. Miller
This reverts commit d4766692e72422f3b0f0e9ac6773d92baad07d51. qdisc_destroy() now runs in RTNL fully again, so this change is no longer needed. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18pkt_sched: remove bogus block (cleanup)Ilpo Järvinen
...Last block local var got just deleted. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18nf_nat: use secure_ipv4_port_ephemeral() for NAT port randomizationStephen Hemminger
Use incoming network tuple as seed for NAT port randomization. This avoids concerns of leaking net_random() bits, and also gives better port distribution. Don't have NAT server, compile tested only. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> [ added missing EXPORT_SYMBOL_GPL ] Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18netfilter: ctnetlink: sleepable allocation with spin lock bhPablo Neira Ayuso
This patch removes a GFP_KERNEL allocation while holding a spin lock with bottom halves disabled in ctnetlink_change_helper(). This problem was introduced in 2.6.23 with the netfilter extension infrastructure. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18netfilter: ctnetlink: fix sleep in read-side lock sectionPablo Neira Ayuso
Fix allocation with GFP_KERNEL in ctnetlink_create_conntrack() under read-side lock sections. This problem was introduced in 2.6.25. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18netfilter: ctnetlink: fix double helper assignation for NAT'ed conntracksPablo Neira Ayuso
If we create a conntrack that has NAT handlings and a helper, the helper is assigned twice. This happens because nf_nat_setup_info() - via nf_conntrack_alter_reply() - sets the helper before ctnetlink, which indeed does not check if the conntrack already has a helper as it thinks that it is a brand new conntrack. The fix moves the helper assignation before the set of the status flags. This avoids a bogus assertion in __nf_ct_ext_add (if netfilter assertions are enabled) which checks that the conntrack must not be confirmed. This problem was introduced in 2.6.23 with the netfilter extension infrastructure. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2008-08-18netfilter: ipt_addrtype: Fix matching of inverted destination address typeAnders Grafström
This patch fixes matching of inverted destination address type. Signed-off-by: Anders Grafström <grfstrm@users.sourceforge.net> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18Merge branch 'master' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6
2008-08-18dccp: Fix panic caused by too early termination of retransmission mechanismGerrit Renker
Thanks is due to Wei Yongjun for the detailed analysis and description of this bug at http://marc.info/?l=dccp&m=121739364909199&w=2 The problem is that invalid packets received by a client in state REQUEST cause the retransmission timer for the DCCP-Request to be reset. This includes freeing the Request-skb ( in dccp_rcv_request_sent_state_process() ). As a consequence, * the arrival of further packets cause a double-free, triggering a panic(), * the connection then may hang, since further retransmissions are blocked. This patch changes the order of statements so that the retransmission timer is reset, and the pending Request freed, only if a valid Response has arrived (or the number of sysctl-retries has been exhausted). Further changes: ---------------- To be on the safe side, replaced __kfree_skb with kfree_skb so that if due to unexpected circumstances the sk_send_head is NULL the WARN_ON is used instead. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18pkt_sched: Don't hold qdisc lock over qdisc_destroy().David S. Miller
Based upon reports by Denys Fedoryshchenko, and feedback and help from Jarek Poplawski and Herbert Xu. We always either: 1) Never made an external reference to this qdisc. or 2) Did a dev_deactivate() which purged all asynchronous references. So do not lock the qdisc when we call qdisc_destroy(), it's illegal anyways as when we drop the lock this is free'd memory. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18pkt_sched: Add lockdep annotation for qdisc locksJarek Poplawski
Qdisc locks are initialized in the same function, qdisc_alloc(), so lockdep can't distinguish tx qdisc lock from rx and reports "possible recursive locking detected" when both these locks are taken eg. while using act_mirred with ifb. This looks like a false positive. Anyway, after this patch these locks will be reported more exactly. Reported-by: Denys Fedoryshchenko <denys@visp.net.lb> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18pkt_sched: Never schedule non-root qdiscs.David S. Miller
Based upon initial discovery and patch by Jarek Poplawski. The qdisc watchdogs can be attached to any qdisc, not just the root, so make sure we schedule the correct one. CBQ has a similar bug. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-18mac80211: update new sta's rx timestampRon Rindjunsky
This patch fixes needless probe request caused by zero value in sta->last_rx inside ieee80211_associated flow Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com> Signed-off-by: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-18rfkill: protect suspended rfkill controllersHenrique de Moraes Holschuh
Guard rfkill controllers attached to a rfkill class against state changes after class suspend has been issued. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Acked-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-18[Bluetooth] Consolidate maintainers informationMarcel Holtmann
The Bluetooth entries for the MAINTAINERS file are a little bit too much. Consolidate them into two entries. One for Bluetooth drivers and another one for the Bluetooth subsystem. Also the MODULE_AUTHOR should indicate the current maintainer of the module and actually not the original author. Fix all Bluetooth modules to provide current maintainer information. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2008-08-18[Bluetooth] Fix userspace breakage due missing class linksMarcel Holtmann
The Bluetooth adapters and connections are best presented via a class in sysfs. The removal of the links inside the Bluetooth class broke assumptions by userspace programs on how to find attached adapters. This patch creates adapters and connections as part of the Bluetooth class, but it uses different device types to distinguish them. The userspace programs can now easily navigate in the sysfs device tree. The unused platform device and bus have been removed to keep the code simple and clean. Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2008-08-18pkt_sched: Fix return value corruption in HTB and TBF.David S. Miller
Based upon a bug report by Josip Rodin. Packet schedulers should only return NET_XMIT_DROP iff the packet really was dropped. If the packet does reach the device after we return NET_XMIT_DROP then TCP can crash because it depends upon the enqueue path return values being accurate. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-17pkt_sched: Fix missed RCU unlock in dev_queue_xmit()David S. Miller
Noticed by Jarek Poplawski. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-17ipv6: Fix the return interface index when get it while no message is received.Yang Hongyang
When get receiving interface index while no message is received, the bounded device's index of the socket should be returned. RFC 3542: Issuing getsockopt() for the above options will return the sticky option value i.e., the value set with setsockopt(). If no sticky option value has been set getsockopt() will return the following values: - For the IPV6_PKTINFO option, it will return an in6_pktinfo structure with ipi6_addr being in6addr_any and ipi6_ifindex being zero. Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-17sch_prio: Use NET_XMIT_SUCCESS instead of "0" constant.David S. Miller
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-17sch_prio: Use return value from inner qdisc requeueJussi Kivilinna
Use return value from inner qdisc requeue when value returned isn't NET_XMIT_SUCCESS, instead of always returning NET_XMIT_DROP. Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-17pkt_sched: No longer destroy qdiscs from RCU.David S. Miller
We can now kill them synchronously with all of the previous dev_deactivate() cures. This makes netdev destruction and shutdown saner as the qdiscs hold references to the device. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-17pkt_sched: Grab correct lock in notify_and_destroy().Jarek Poplawski
From: Jarek Poplawski <jarkao2@gmail.com> When we are destroying non-root qdiscs, we need to lock the root of the qdisc tree not the the qdisc itself. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-17pkt_sched: Simplify dev_deactivate() polling loop.David S. Miller
The condition under which the previous qdisc has no more references after we've attached &noop_qdisc is that both RUNNING and SCHED are both seen clear while holding the root lock. So just make specifically that check in the polling loop, instead of this overly complex "check without then check with lock held" sequence. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-08-17net: Change handling of the __QDISC_STATE_SCHED flag in net_tx_action().Jarek Poplawski
Change handling of the __QDISC_STATE_SCHED flag in net_tx_action() to enable proper control in dev_deactivate(). Now, if this flag is seen as unset under root_lock means a qdisc can't be netif_scheduled. Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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