summaryrefslogtreecommitdiffstats
path: root/net
AgeCommit message (Collapse)Author
2010-10-20ceph: don't crash when passed bad mount optionsYehuda Sadeh
This only happened when parse_extra_token was not passed to ceph_parse_option() (hence, only happened in rbd). Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
2010-10-20ceph: add pagelist_reserve, pagelist_truncate, pagelist_set_cursorGreg Farnum
These facilitate preallocation of pages so that we can encode into the pagelist in an atomic context. Signed-off-by: Greg Farnum <gregf@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20rbd: introduce rados block device (rbd), based on libcephYehuda Sadeh
The rados block device (rbd), based on osdblk, creates a block device that is backed by objects stored in the Ceph distributed object storage cluster. Each device consists of a single metadata object and data striped over many data objects. The rbd driver supports read-only snapshots. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20ceph: factor out libceph from Ceph file systemYehuda Sadeh
This factors out protocol and low-level storage parts of ceph into a separate libceph module living in net/ceph and include/linux/ceph. This is mostly a matter of moving files around. However, a few key pieces of the interface change as well: - ceph_client becomes ceph_fs_client and ceph_client, where the latter captures the mon and osd clients, and the fs_client gets the mds client and file system specific pieces. - Mount option parsing and debugfs setup is correspondingly broken into two pieces. - The mon client gets a generic handler callback for otherwise unknown messages (mds map, in this case). - The basic supported/required feature bits can be expanded (and are by ceph_fs_client). No functional change, aside from some subtle error handling cases that got cleaned up in the refactoring process. Signed-off-by: Sage Weil <sage@newdream.net>
2010-10-20net: avoid RCU for NOCACHE dstEric Dumazet
There is no point using RCU for dst we allocate for a very short time (used once). Change dst_release() to take DST_NOCACHE into account, but also change skb_dst_set_noref() to force a refcount increment for such dst. This is a _huge_ gain, because we dont waste memory to store xx thousand of dsts. Instead of queueing them to RCU, we can free them instantly. CPU caches can stay hot, re-using same memory blocks to hold temporary dsts. Note : remove unneeded smp_mb__before_atomic_dec(); in dst_release(), since atomic_dec_return() implies a full memory barrier. Stress test, 160.000.000 udp frames sent, IP route cache disabled (DDOS). Before: real 0m38.091s user 0m13.189s sys 7m53.018s After: real 0m29.946s user 0m12.157s sys 7m40.605s For reference, if IP route cache was enabled : real 0m32.030s user 0m10.521s sys 8m15.243s Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-20net: allocate tx queues in register_netdeviceTom Herbert
This patch introduces netif_alloc_netdev_queues which is called from register_device instead of alloc_netdev_mq. This makes TX queue allocation symmetric with RX allocation. Also, queue locks allocation is done in netdev_init_one_queue. Change set_real_num_tx_queues to fail if requested number < 1 or greater than number of allocated queues. Signed-off-by: Tom Herbert <therbert@google.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-20net: cleanups in RX queue allocationTom Herbert
Clean up in RX queue allocation. In netif_set_real_num_rx_queues return error on attempt to set zero queues, or requested number is greater than number of allocated queues. In netif_alloc_rx_queues, do BUG_ON if queue_count is zero. Signed-off-by: Tom Herbert <therbert@google.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-20net: fail alloc_netdev_mq if queue count < 1Tom Herbert
In alloc_netdev_mq fail if requested queue_count < 1. Signed-off-by: Tom Herbert <therbert@google.com> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-20Merge branch 'for-davem' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6
2010-10-20phonet: remove the unused variable pnChangli Gao
Signed-off-by: Changli Gao <xiaosuo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-20netpoll: Revert napi_poll fix for bonding driverNeil Horman
In an erlier patch I modified napi_poll so that devices with IFF_MASTER polled the per_cpu list instead of the device list for napi. I did this because the bonding driver has no napi instances to poll, it instead expects to check the slave devices napi instances, which napi_poll was unaware of. Looking at this more closely however, I now see this isn't strictly needed. As the bond driver poll_controller calls the slaves poll_controller via netpoll_poll_dev, which recursively calls poll_napi on each slave, allowing those napi instances to get serviced. The earlier patch isn't at all harmfull, its just not needed, so lets revert it to make the code cleaner. Sorry for the noise, Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Reviewed-by: WANG Cong <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-19Fixed race condition at ip_vs.ko module init.Eduardo Blanco
Lists were initialized after the module was registered. Multiple ipvsadm processes at module load triggered a race condition that resulted in a null pointer dereference in do_ip_vs_get_ctl(). As a result, __ip_vs_mutex was left locked preventing all further ipvsadm commands. Signed-off-by: Eduardo J. Blanco <ejblanco@google.com> Signed-off-by: Simon Horman <horms@verge.net.au>
2010-10-19sunrpc: Turn list_for_each-s into the ..._entry-sPavel Emelyanov
Saves some lines of code and some branticks when reading one. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Remove dead "else" branch from bc xprt creationPavel Emelyanov
Since the xprt in question is forcibly set to be bound the else branch of this check is unneeded. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Don't return NULL from rpcb_createPavel Emelyanov
> The reason for this is in the future, we may want to support additional > address family types. We should, therefore, ensure that every piece of > code that is sensitive to address families fail in some orderly manner > to let developers know where a change is needed. Makes sense. I was under impression, that AF-s other than INET are not cared about at all :( Here's a fixed version of the patch. Log: Its callers check for ERR_PTR. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Remove useless if (task == NULL) from xprt_reserve_xprtPavel Emelyanov
The task in question is dereferenced above (and is actually never NULL). Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Remove UDP worker wrappersPavel Emelyanov
Same for UDP sockets creation paths. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Remove TCP worker wrappersPavel Emelyanov
The v4 and the v6 wrappers only pass the respective family to the xs_tcp_setup_socket. This family can be taken from the xprt's sockaddr. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Pass family to setup_socket callsPavel Emelyanov
Now we have a single socket creation routine and can call it directly from the setup_socket routines. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Merge xs_create_sock codePavel Emelyanov
After xs_bind is merged it's easy to merge its callers. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> [bfields@redhat.com: fix address family initialization] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Merge the xs_bind codePavel Emelyanov
There's the only difference betseen the xs_bind4 and the xs_bind6 - the size of sockaddr structure they use. Fortunatelly its size can be indirectly get from the transport. Change since v1: * use sockaddr_storage instead of sockaddr * use rpc_set_port instead of manual port assigning Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> [bfields@redhat.com: fix address family initialization] Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Call xs_create_sockX directly from setup_socketPavel Emelyanov
Remove now unneeded wrappers that just add type and protocol to socket creation callback. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Factor out v6 sockets creationPavel Emelyanov
Same patch for v6 protocols. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Factor out v4 sockets creationPavel Emelyanov
The UDPv4 and TCPv4 socket creation callbacks now look very similar. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Factor out udp sockets creationPavel Emelyanov
Make it look like the TCP sockets creation. Unfortunately the git diff made the patch look messy :( Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Remove duplicate xprt/transport arguments from callsPavel Emelyanov
The xs_tcp_reuse_connection takes the xprt only to pass it down to the xs_abort_connection. The later one can get it from the given transport itself. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Get xprt pointer once in xs_tcp_setup_socketPavel Emelyanov
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Remove unused sock arg from xs_next_srcportPavel Emelyanov
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19sunrpc: Remove unused sock arg from xs_get_srcportPavel Emelyanov
Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-19inet: RCU changes in inetdev_by_index()Eric Dumazet
Convert inetdev_by_index() to not increment in_dev refcount. Callers hold RCU or RTNL, and should not decrement in_dev refcount. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-19net: avoid a dev refcount in ip_mc_find_dev()Eric Dumazet
We hold RTNL in ip_mc_find_dev(), no need to touch device refcount. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-19sunrpc: remove the big kernel lockArnd Bergmann
The sunrpc cache_ioctl function does not need the big kernel lock because it uses its own queue_lock already. rpc_pipe_ioctl apparently should be using i_lock like the other operations on the pipe file descriptor do. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2010-10-19ipvs: IPv6 tunnel modeHans Schillstrom
IPv6 encapsulation uses a bad source address for the tunnel. i.e. VIP will be used as local-addr and encap. dst addr. Decapsulation will not accept this. Example LVS (eth1 2003::2:0:1/96, VIP 2003::2:0:100) (eth0 2003::1:0:1/96) RS (ethX 2003::1:0:5/96) tcpdump 2003::2:0:100 > 2003::1:0:5: IP6 (hlim 63, next-header TCP (6) payload length: 40) 2003::3:0:10.50991 > 2003::2:0:100.http: Flags [S], cksum 0x7312 (correct), seq 3006460279, win 5760, options [mss 1440,sackOK,TS val 1904932 ecr 0,nop,wscale 3], length 0 In Linux IPv6 impl. you can't have a tunnel with an any cast address receiving packets (I have not tried to interpret RFC 2473) To have receive capabilities the tunnel must have: - Local address set as multicast addr or an unicast addr - Remote address set as an unicast addr. - Loop back addres or Link local address are not allowed. This causes us to setup a tunnel in the Real Server with the LVS as the remote address, here you can't use the VIP address since it's used inside the tunnel. Solution Use outgoing interface IPv6 address (match against the destination). i.e. use ip6_route_output() to look up the route cache and then use ipv6_dev_get_saddr(...) to set the source address of the encapsulated packet. Additionally, cache the results in new destination fields: dst_cookie and dst_saddr and properly check the returned dst from ip6_route_output. We now add xfrm_lookup call only for the tunneling method where the source address is a local one. Signed-off-by:Hans Schillstrom <hans.schillstrom@ericsson.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-19netfilter: ctnetlink: add expectation deletion eventsPablo Neira Ayuso
This patch allows to listen to events that inform about expectations destroyed. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-18svcrdma: Cleanup DMA unmapping in error paths.Tom Tucker
There are several error paths in the code that do not unmap DMA. This patch adds calls to svc_rdma_unmap_dma to free these DMA contexts. Signed-off-by: Tom Tucker <tom@opengridcomputing.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-18svcrdma: Change DMA mapping logic to avoid the page_address kernel APITom Tucker
There was logic in the send path that assumed that a page containing data to send to the client has a KVA. This is not always the case and can result in data corruption when page_address returns zero and we end up DMA mapping zero. This patch changes the bus mapping logic to avoid page_address() where necessary and converts all calls from ib_dma_map_single to ib_dma_map_page in order to keep the map/unmap calls symmetric. Signed-off-by: Tom Tucker <tom@ogc.us> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2010-10-18sched: Fix softirq time accountingVenkatesh Pallipadi
Peter Zijlstra found a bug in the way softirq time is accounted in VIRT_CPU_ACCOUNTING on this thread: http://lkml.indiana.edu/hypermail//linux/kernel/1009.2/01366.html The problem is, softirq processing uses local_bh_disable internally. There is no way, later in the flow, to differentiate between whether softirq is being processed or is it just that bh has been disabled. So, a hardirq when bh is disabled results in time being wrongly accounted as softirq. Looking at the code a bit more, the problem exists in !VIRT_CPU_ACCOUNTING as well. As account_system_time() in normal tick based accouting also uses softirq_count, which will be set even when not in softirq with bh disabled. Peter also suggested solution of using 2*SOFTIRQ_OFFSET as irq count for local_bh_{disable,enable} and using just SOFTIRQ_OFFSET while softirq processing. The patch below does that and adds API in_serving_softirq() which returns whether we are currently processing softirq or not. Also changes one of the usages of softirq_count in net/sched/cls_cgroup.c to in_serving_softirq. Looks like many usages of in_softirq really want in_serving_softirq. Those changes can be made individually on a case by case basis. Signed-off-by: Venkatesh Pallipadi <venki@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1286237003-12406-2-git-send-email-venki@google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-10-18bonding: Fix napi poll for bonding driverNeil Horman
Usually the netpoll path, when preforming a napi poll can get away with just polling all the napi instances of the configured device. Thats not the case for the bonding driver however, as the napi instances which may wind up getting flagged as needing polling after the poll_controller call don't belong to the bonded device, but rather to the slave devices. Fix this by checking the device in question for the IFF_MASTER flag, if set, we know we need to check the full poll list for this cpu, rather than just the devices napi instance list. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-18bonding: Fix bonding drivers improper modification of netpoll structureNeil Horman
The bonding driver currently modifies the netpoll structure in its xmit path while sending frames from netpoll. This is racy, as other cpus can access the netpoll structure in parallel. Since the bonding driver points np->dev to a slave device, other cpus can inadvertently attempt to send data directly to slave devices, leading to improper locking with the bonding master, lost frames, and deadlocks. This patch fixes that up. This patch also removes the real_dev pointer from the netpoll structure as that data is really only used by bonding in the poll_controller, and we can emulate its behavior by check each slave for IS_UP. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-18IPv4: route.c: Change checks against 0xffffffff to ipv4_is_lbcast()Andy Walls
Change a few checks against the hardcoded broadcast address, 0xffffffff, to ipv4_is_lbcast(). Remove some existing checks using ipv4_is_lbcast() that are now obviously superfluous. Signed-off-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-18netfilter: fix kconfig unmet dependency warningRandy Dunlap
Fix netfilter kconfig unmet dependencies warning & spell out "compatible" while there. warning: (IP_NF_TARGET_TTL && NET && INET && NETFILTER && IP_NF_IPTABLES && NETFILTER_ADVANCED || IP6_NF_TARGET_HL && NET && INET && IPV6 && NETFILTER && IP6_NF_IPTABLES && NETFILTER_ADVANCED) selects NETFILTER_XT_TARGET_HL which has unmet direct dependencies ((IP_NF_MANGLE || IP6_NF_MANGLE) && NETFILTER_ADVANCED) Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
2010-10-18Update broken web addresses in the kernel.Justin P. Mattock
The patch below updates broken web addresses in the kernel Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Matt Turner <mattst88@gmail.com> Cc: Dimitry Torokhov <dmitry.torokhov@gmail.com> Cc: Mike Frysinger <vapier.adi@gmail.com> Acked-by: Ben Pfaff <blp@cs.stanford.edu> Acked-by: Hans J. Koch <hjk@linutronix.de> Reviewed-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-10-18tipc: Simplify bearer shutdown logicAllan Stephens
Optimize processing in TIPC's bearer shutdown code, including: 1. Remove an unnecessary check to see if TIPC bearer's can exist. 2. Don't release spinlocks before calling a media-specific disabling routine, since the routine can't sleep. 3. Make bearer_disable() operate directly on a struct bearer, instead of needlessly taking a name and then mapping that to the struct. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Reviewed-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-18tipc: Kill tipc_get_mode() completely.David S. Miller
It's completely unused and exporting a static symbol makes no sense and breaks the build. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-17Bluetooth: fix oops in l2cap_connect_reqNathan Holstein
In error cases when the ACL is insecure or we fail to allocate a new struct sock, we jump to the "response" label. If so, "sk" will be null and the kernel crashes. Signed-off-by: Nathan Holstein <nathan.holstein@gmail.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
2010-10-17fib_hash: RCU conversion phase 2Eric Dumazet
Get rid of fib_hash_lock rwlock. The fn_zone hash table resize is the noticeable part of this patch. I added a seqlock per fn_zone, so that readers can restart their lookup in the (very rare) case a writer expanded the hash table. Add rcu heads in fib_alias and fib_node, use call_rcu() to defer their freeing, and use appropriate _rcu list manipulations. Stress test (160.000.000 udp frames sent, IP route cache disabled to mimic DDOS attack, FIB_HASH) Before: real 0m41.191s user 0m13.137s sys 8m55.241s After: real 0m38.091s user 0m13.189s sys 7m53.018s Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-17fib_hash: RCU conversion phase 1Eric Dumazet
First step for RCU conversion of fib_hash : struct fn_zone are created and never deleted. Very classic conversion, using rcu_assign_pointer(), rcu_dereference() and rtnl_dereference() verbs. __rcu markers on fz_next and fn_zone_list They are created under RTNL, we dont need fib_hash_lock anymore in fn_new_zone(). Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-17fib_hash: embed initial hash table in fn_zoneEric Dumazet
While looking for false sharing problems, I noticed sizeof(struct fn_zone) was small (28 bytes) and possibly sharing a cache line with an often written kernel structure. Most of the time, fn_zone uses its initial hash table of 16 slots. We can avoid the false sharing problem by embedding this initial hash table in fn_zone itself, so that sizeof(fn_zone) > L1_CACHE_BYTES We did a similar optimization in commit a6501e080c (Reduce memory needs and speedup lookups) Add a fz_revorder field to speedup fn_hash() a bit. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-17tcp: use correct counters in CA_CWR state tooIlpo Järvinen
As CWR is stronger than CA_Disorder state, we can miscount SACK/Reno failure into other timeouts. Not a bad problem as it can happen only due to ECN, FRTO detecting spurious RTO or xmit error which are the only callers of tcp_enter_cwr. And even then losses and RTO must still follow thereafter to actually end up into the relevant code paths. Compile tested. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-17tcp: sack lost marking fixesIlpo Järvinen
When only fast rexmit should be done, tcp_mark_head_lost marks L too far. Also, sacked_upto below 1 is perfectly valid number, the packets == 0 then needs to be trapped elsewhere. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: David S. Miller <davem@davemloft.net>