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* Merge branch 'for-linus' of ↵Linus Torvalds2013-01-032-28/+29
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph fixes from Sage Weil: "Two of Alex's patches deal with a race when reseting server connections for open RBD images, one demotes some non-fatal BUGs to WARNs, and my patch fixes a protocol feature bit failure path." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: libceph: fix protocol feature mismatch failure path libceph: WARN, don't BUG on unexpected connection states libceph: always reset osds when kicking libceph: move linger requests sooner in kick_requests()
| * libceph: fix protocol feature mismatch failure pathSage Weil2012-12-281-10/+4Star
| | | | | | | | | | | | | | | | | | | | | | | | We should not set con->state to CLOSED here; that happens in ceph_fault() in the caller, where it first asserts that the state is not yet CLOSED. Avoids a BUG when the features don't match. Since the fail_protocol() has become a trivial wrapper, replace calls to it with direct calls to reset_connection(). Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
| * libceph: WARN, don't BUG on unexpected connection statesAlex Elder2012-12-281-6/+5Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A number of assertions in the ceph messenger are implemented with BUG_ON(), killing the system if connection's state doesn't match what's expected. At this point our state model is (evidently) not well understood enough for these assertions to trigger a BUG(). Convert all BUG_ON(con->state...) calls to be WARN_ON(con->state...) so we learn about these issues without killing the machine. We now recognize that a connection fault can occur due to a socket closure at any time, regardless of the state of the connection. So there is really nothing we can assert about the state of the connection at that point so eliminate that assertion. Reported-by: Ugis <ugis22@gmail.com> Tested-by: Ugis <ugis22@gmail.com> Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * libceph: always reset osds when kickingAlex Elder2012-12-281-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When ceph_osdc_handle_map() is called to process a new osd map, kick_requests() is called to ensure all affected requests are updated if necessary to reflect changes in the osd map. This happens in two cases: whenever an incremental map update is processed; and when a full map update (or the last one if there is more than one) gets processed. In the former case, the kick_requests() call is followed immediately by a call to reset_changed_osds() to ensure any connections to osds affected by the map change are reset. But for full map updates this isn't done. Both cases should be doing this osd reset. Rather than duplicating the reset_changed_osds() call, move it into the end of kick_requests(). Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * libceph: move linger requests sooner in kick_requests()Alex Elder2012-12-281-11/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The kick_requests() function is called by ceph_osdc_handle_map() when an osd map change has been indicated. Its purpose is to re-queue any request whose target osd is different from what it was when it was originally sent. It is structured as two loops, one for incomplete but registered requests, and a second for handling completed linger requests. As a special case, in the first loop if a request marked to linger has not yet completed, it is moved from the request list to the linger list. This is as a quick and dirty way to have the second loop handle sending the request along with all the other linger requests. Because of the way it's done now, however, this quick and dirty solution can result in these incomplete linger requests never getting re-sent as desired. The problem lies in the fact that the second loop only arranges for a linger request to be sent if it appears its target osd has changed. This is the proper handling for *completed* linger requests (it avoids issuing the same linger request twice to the same osd). But although the linger requests added to the list in the first loop may have been sent, they have not yet completed, so they need to be re-sent regardless of whether their target osd has changed. The first required fix is we need to avoid calling __map_request() on any incomplete linger request. Otherwise the subsequent __map_request() call in the second loop will find the target osd has not changed and will therefore not re-send the request. Second, we need to be sure that a sent but incomplete linger request gets re-sent. If the target osd is the same with the new osd map as it was when the request was originally sent, this won't happen. This can be fixed through careful handling when we move these requests from the request list to the linger list, by unregistering the request *before* it is registered as a linger request. This works because a side-effect of unregistering the request is to make the request's r_osd pointer be NULL, and *that* will ensure the second loop actually re-sends the linger request. Processing of such a request is done at that point, so continue with the next one once it's been moved. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
* | ipv6/ip6_gre: set transport header correctlyIsaku Yamahata2012-12-271-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ip6gre_xmit2() incorrectly sets transport header to inner payload instead of GRE header. It seems copy-and-pasted from ipip.c. Set transport header to gre header. (In ipip case the transport header is the inner ip header, so that's correct.) Found by inspection. In practice the incorrect transport header doesn't matter because the skb usually is sent to another net_device or socket, so the transport header isn't referenced. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4/ip_gre: set transport header correctly to gre headerIsaku Yamahata2012-12-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ipgre_tunnel_xmit() incorrectly sets transport header to inner payload instead of GRE header. It seems copy-and-pasted from ipip.c. So set transport header to gre header. (In ipip case the transport header is the inner ip header, so that's correct.) Found by inspection. In practice the incorrect transport header doesn't matter because the skb usually is sent to another net_device or socket, so the transport header isn't referenced. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
* | IB/rds: suppress incompatible protocol when version is knownMarciniszyn, Mike2012-12-271-6/+5Star
| | | | | | | | | | | | | | | | Add an else to only print the incompatible protocol message when version hasn't been established. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | IB/rds: Correct ib_api use with gs_dma_address/sg_dma_lenMarciniszyn, Mike2012-12-271-3/+6
| | | | | | | | | | | | | | | | | | | | | | | | 0b088e00 ("RDS: Use page_remainder_alloc() for recv bufs") added uses of sg_dma_len() and sg_dma_address(). This makes RDS DOA with the qib driver. IB ulps should use ib_sg_dma_len() and ib_sg_dma_address respectively since some HCAs overload ib_sg_dma* operations. Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tcp: should drop incoming frames without ACK flag setEric Dumazet2012-12-271-4/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In commit 96e0bf4b5193d (tcp: Discard segments that ack data not yet sent) John Dykstra enforced a check against ack sequences. In commit 354e4aa391ed5 (tcp: RFC 5961 5.2 Blind Data Injection Attack Mitigation) I added more safety tests. But we missed fact that these tests are not performed if ACK bit is not set. RFC 793 3.9 mandates TCP should drop a frame without ACK flag set. " fifth check the ACK field, if the ACK bit is off drop the segment and return" Not doing so permits an attacker to only guess an acceptable sequence number, evading stronger checks. Many thanks to Zhiyun Qian for bringing this issue to our attention. See : http://web.eecs.umich.edu/~zhiyunq/pub/ccs12_TCP_sequence_number_inference.pdf Reported-by: Zhiyun Qian <zhiyunq@umich.edu> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Nandita Dukkipati <nanditad@google.com> Cc: Neal Cardwell <ncardwell@google.com> Cc: John Dykstra <john.dykstra1@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | batman-adv: fix random jitter calculationAkinobu Mita2012-12-261-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | batadv_iv_ogm_emit_send_time() attempts to calculates a random integer in the range of 'orig_interval +- BATADV_JITTER' by the below lines. msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; msecs += (random32() % 2 * BATADV_JITTER); But it actually gets 'orig_interval' or 'orig_interval - BATADV_JITTER' because '%' and '*' have same precedence and associativity is left-to-right. This adds the parentheses at the appropriate position so that it matches original intension. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Antonio Quartulli <ordex@autistici.org> Cc: Marek Lindner <lindner_marek@yahoo.de> Cc: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Cc: Antonio Quartulli <ordex@autistici.org> Cc: b.a.t.m.a.n@lists.open-mesh.org Cc: "David S. Miller" <davem@davemloft.net> Cc: netdev@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
* | arp: fix a regression in arp_solicit()Cong Wang2012-12-251-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sedat reported the following commit caused a regression: commit 9650388b5c56578fdccc79c57a8c82fb92b8e7f1 Author: Eric Dumazet <edumazet@google.com> Date: Fri Dec 21 07:32:10 2012 +0000 ipv4: arp: fix a lockdep splat in arp_solicit This is due to the 6th parameter of arp_send() needs to be NULL for the broadcast case, the above commit changed it to an all-zero array by mistake. Reported-by: Sedat Dilek <sedat.dilek@gmail.com> Tested-by: Sedat Dilek <sedat.dilek@gmail.com> Cc: Sedat Dilek <sedat.dilek@gmail.com> Cc: Eric Dumazet <edumazet@google.com> Cc: David S. Miller <davem@davemloft.net> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: sched: integer overflow fixStefan Hasko2012-12-221-1/+1
| | | | | | | | | | | | | | | | Fixed integer overflow in function htb_dequeue Signed-off-by: Stefan Hasko <hasko.stevo@gmail.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | CONFIG_HOTPLUG removal from networking coreGreg KH2012-12-223-15/+0Star
| | | | | | | | | | | | | | | | | | | | CONFIG_HOTPLUG is always enabled now, so remove the unused code that was trying to be compiled out when this option was disabled, in the networking core. Cc: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | bridge: call br_netpoll_disable in br_add_ifGao feng2012-12-211-3/+5
| | | | | | | | | | | | | | | | | | | | | | When netdev_set_master faild in br_add_if, we should call br_netpoll_disable to do some cleanup jobs,such as free the memory of struct netpoll which allocated in br_netpoll_enable. Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com> Acked-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv4: arp: fix a lockdep splat in arp_solicit()Eric Dumazet2012-12-211-5/+3Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Yan Burman reported following lockdep warning : ============================================= [ INFO: possible recursive locking detected ] 3.7.0+ #24 Not tainted --------------------------------------------- swapper/1/0 is trying to acquire lock: (&n->lock){++--..}, at: [<ffffffff8139f56e>] __neigh_event_send +0x2e/0x2f0 but task is already holding lock: (&n->lock){++--..}, at: [<ffffffff813f63f4>] arp_solicit+0x1d4/0x280 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&n->lock); lock(&n->lock); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by swapper/1/0: #0: (((&n->timer))){+.-...}, at: [<ffffffff8104b350>] call_timer_fn+0x0/0x1c0 #1: (&n->lock){++--..}, at: [<ffffffff813f63f4>] arp_solicit +0x1d4/0x280 #2: (rcu_read_lock_bh){.+....}, at: [<ffffffff81395400>] dev_queue_xmit+0x0/0x5d0 #3: (rcu_read_lock_bh){.+....}, at: [<ffffffff813cb41e>] ip_finish_output+0x13e/0x640 stack backtrace: Pid: 0, comm: swapper/1 Not tainted 3.7.0+ #24 Call Trace: <IRQ> [<ffffffff8108c7ac>] validate_chain+0xdcc/0x11f0 [<ffffffff8108d570>] ? __lock_acquire+0x440/0xc30 [<ffffffff81120565>] ? kmem_cache_free+0xe5/0x1c0 [<ffffffff8108d570>] __lock_acquire+0x440/0xc30 [<ffffffff813c3570>] ? inet_getpeer+0x40/0x600 [<ffffffff8108d570>] ? __lock_acquire+0x440/0xc30 [<ffffffff8139f56e>] ? __neigh_event_send+0x2e/0x2f0 [<ffffffff8108ddf5>] lock_acquire+0x95/0x140 [<ffffffff8139f56e>] ? __neigh_event_send+0x2e/0x2f0 [<ffffffff8108d570>] ? __lock_acquire+0x440/0xc30 [<ffffffff81448d4b>] _raw_write_lock_bh+0x3b/0x50 [<ffffffff8139f56e>] ? __neigh_event_send+0x2e/0x2f0 [<ffffffff8139f56e>] __neigh_event_send+0x2e/0x2f0 [<ffffffff8139f99b>] neigh_resolve_output+0x16b/0x270 [<ffffffff813cb62d>] ip_finish_output+0x34d/0x640 [<ffffffff813cb41e>] ? ip_finish_output+0x13e/0x640 [<ffffffffa046f146>] ? vxlan_xmit+0x556/0xbec [vxlan] [<ffffffff813cb9a0>] ip_output+0x80/0xf0 [<ffffffff813ca368>] ip_local_out+0x28/0x80 [<ffffffffa046f25a>] vxlan_xmit+0x66a/0xbec [vxlan] [<ffffffffa046f146>] ? vxlan_xmit+0x556/0xbec [vxlan] [<ffffffff81394a50>] ? skb_gso_segment+0x2b0/0x2b0 [<ffffffff81449355>] ? _raw_spin_unlock_irqrestore+0x65/0x80 [<ffffffff81394c57>] ? dev_queue_xmit_nit+0x207/0x270 [<ffffffff813950c8>] dev_hard_start_xmit+0x298/0x5d0 [<ffffffff813956f3>] dev_queue_xmit+0x2f3/0x5d0 [<ffffffff81395400>] ? dev_hard_start_xmit+0x5d0/0x5d0 [<ffffffff813f5788>] arp_xmit+0x58/0x60 [<ffffffff813f59db>] arp_send+0x3b/0x40 [<ffffffff813f6424>] arp_solicit+0x204/0x280 [<ffffffff813a1a70>] ? neigh_add+0x310/0x310 [<ffffffff8139f515>] neigh_probe+0x45/0x70 [<ffffffff813a1c10>] neigh_timer_handler+0x1a0/0x2a0 [<ffffffff8104b3cf>] call_timer_fn+0x7f/0x1c0 [<ffffffff8104b350>] ? detach_if_pending+0x120/0x120 [<ffffffff8104b748>] run_timer_softirq+0x238/0x2b0 [<ffffffff813a1a70>] ? neigh_add+0x310/0x310 [<ffffffff81043e51>] __do_softirq+0x101/0x280 [<ffffffff814518cc>] call_softirq+0x1c/0x30 [<ffffffff81003b65>] do_softirq+0x85/0xc0 [<ffffffff81043a7e>] irq_exit+0x9e/0xc0 [<ffffffff810264f8>] smp_apic_timer_interrupt+0x68/0xa0 [<ffffffff8145122f>] apic_timer_interrupt+0x6f/0x80 <EOI> [<ffffffff8100a054>] ? mwait_idle+0xa4/0x1c0 [<ffffffff8100a04b>] ? mwait_idle+0x9b/0x1c0 [<ffffffff8100a6a9>] cpu_idle+0x89/0xe0 [<ffffffff81441127>] start_secondary+0x1b2/0x1b6 Bug is from arp_solicit(), releasing the neigh lock after arp_send() In case of vxlan, we eventually need to write lock a neigh lock later. Its a false positive, but we can get rid of it without lockdep annotations. We can instead use neigh_ha_snapshot() helper. Reported-by: Yan Burman <yanb@mellanox.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: devnet_rename_seq should be a seqcountEric Dumazet2012-12-212-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Using a seqlock for devnet_rename_seq is not a good idea, as device_rename() can sleep. As we hold RTNL, we dont need a protection for writers, and only need a seqcount so that readers can catch a change done by a writer. Bug added in commit c91f6df2db4972d3 (sockopt: Change getsockopt() of SO_BINDTODEVICE to return an interface name) Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Brian Haley <brian.haley@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ip_gre: fix possible use after freeEric Dumazet2012-12-211-1/+5
| | | | | | | | | | | | | | | | | | | | | | Once skb_realloc_headroom() is called, tiph might point to freed memory. Cache tiph->ttl value before the reallocation, to avoid unexpected behavior. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ip_gre: make ipgre_tunnel_xmit() not parse network header as IP unconditionallyIsaku Yamahata2012-12-211-1/+4
| | | | | | | | | | | | | | | | | | | | | | ipgre_tunnel_xmit() parses network header as IP unconditionally. But transmitting packets are not always IP packet. For example such packet can be sent by packet socket with sockaddr_ll.sll_protocol set. So make the function check if skb->protocol is IP. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | Merge branch 'for-3.8' of git://linux-nfs.org/~bfields/linuxLinus Torvalds2012-12-205-60/+61
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull nfsd update from Bruce Fields: "Included this time: - more nfsd containerization work from Stanislav Kinsbursky: we're not quite there yet, but should be by 3.9. - NFSv4.1 progress: implementation of basic backchannel security negotiation and the mandatory BACKCHANNEL_CTL operation. See http://wiki.linux-nfs.org/wiki/index.php/Server_4.0_and_4.1_issues for remaining TODO's - Fixes for some bugs that could be triggered by unusual compounds. Our xdr code wasn't designed with v4 compounds in mind, and it shows. A more thorough rewrite is still a todo. - If you've ever seen "RPC: multiple fragments per record not supported" logged while using some sort of odd userland NFS client, that should now be fixed. - Further work from Jeff Layton on our mechanism for storing information about NFSv4 clients across reboots. - Further work from Bryan Schumaker on his fault-injection mechanism (which allows us to discard selective NFSv4 state, to excercise rarely-taken recovery code paths in the client.) - The usual mix of miscellaneous bugs and cleanup. Thanks to everyone who tested or contributed this cycle." * 'for-3.8' of git://linux-nfs.org/~bfields/linux: (111 commits) nfsd4: don't leave freed stateid hashed nfsd4: free_stateid can use the current stateid nfsd4: cleanup: replace rq_resused count by rq_next_page pointer nfsd: warn on odd reply state in nfsd_vfs_read nfsd4: fix oops on unusual readlike compound nfsd4: disable zero-copy on non-final read ops svcrpc: fix some printks NFSD: Correct the size calculation in fault_inject_write NFSD: Pass correct buffer size to rpc_ntop nfsd: pass proper net to nfsd_destroy() from NFSd kthreads nfsd: simplify service shutdown nfsd: replace boolean nfsd_up flag by users counter nfsd: simplify NFSv4 state init and shutdown nfsd: introduce helpers for generic resources init and shutdown nfsd: make NFSd service structure allocated per net nfsd: make NFSd service boot time per-net nfsd: per-net NFSd up flag introduced nfsd: move per-net startup code to separated function nfsd: pass net to __write_ports() and down nfsd: pass net to nfsd_set_nrthreads() ...
| * | nfsd4: cleanup: replace rq_resused count by rq_next_page pointerJ. Bruce Fields2012-12-184-7/+11
| | | | | | | | | | | | | | | | | | | | | It may be a matter of personal taste, but I find this makes the code clearer. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | svcrpc: fix some printksJ. Bruce Fields2012-12-171-4/+4
| | | | | | | | | | | | | | | Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | SUNRPC: remove redundant "linux/nsproxy.h" includesStanislav Kinsbursky2012-12-102-2/+0Star
| | | | | | | | | | | | | | | | | | | | | This is a cleanup patch. Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | svcrpc: support multiple-fragment rpc'sJ. Bruce Fields2012-12-041-25/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Over TCP, RPC's are preceded by a single 4-byte field telling you how long the rpc is (in bytes). The spec also allows you to send an RPC in multiple such records (the high bit of the length field is used to tell you whether this is the final record). We've survived for years without supporting this because in practice the clients we care about don't use it. But the userland rpc libraries do, and every now and then an experimental client will run into this. (Most recently I noticed it while trying to write a pynfs check.) And we're really on the wrong side of the spec here--let's fix this. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | svcrpc: track rpc data length separately from sk_tcplenJ. Bruce Fields2012-12-041-7/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Keep a separate field, sk_datalen, that tracks only the data contained in a fragment, not including the fragment header. For now, this is always just max(0, sk_tcplen - 4), but after we allow multiple fragments sk_datalen will accumulate the total rpc data size while sk_tcplen only tracks progress receiving the current fragment. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | svcrpc: fix off-by-4 error in "incomplete TCP record" dprintkJ. Bruce Fields2012-12-041-1/+2
| | | | | | | | | | | | | | | | | | | | | The full reclen doesn't include the fragment header, but sk_tcplen does. Fix this to make it an apples-to-apples comparison. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | svcrpc: delay minimum-rpc-size check till laterJ. Bruce Fields2012-12-041-9/+7Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Soon we want to support multiple fragments, in which case it may be legal for a single fragment to be smaller than 8 bytes, so we'll want to delay this check till we've reached the last fragment. Also fix an outdated comment. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | svcrpc: don't byte-swap sk_reclen in placeJ. Bruce Fields2012-12-041-15/+11Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | Byte-swapping in place is always a little dubious. Let's instead define this field to always be big-endian, and do the swapping on demand where we need it. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| * | svcrpc: demote some printks to a dprintkJ. Bruce Fields2012-11-081-3/+2Star
| | | | | | | | | | | | | | | | | | | | | In general I'd rather random bad behavior on the network won't trigger a printk. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
* | | Merge branch 'for-linus' of ↵Linus Torvalds2012-12-204-111/+105Star
|\ \ \ | | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph update from Sage Weil: "There are a few different groups of commits here. The largest is Alex's ongoing work to enable the coming RBD features (cloning, striping). There is some cleanup in libceph that goes along with it. Cyril and David have fixed some problems with NFS reexport (leaking dentries and page locks), and there is a batch of patches from Yan fixing problems with the fs client when running against a clustered MDS. There are a few bug fixes mixed in for good measure, many of which will be going to the stable trees once they're upstream. My apologies for the late pull. There is still a gremlin in the rbd map/unmap code and I was hoping to include the fix for that as well, but we haven't been able to confirm the fix is correct yet; I'll send that in a separate pull once it's nailed down." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (68 commits) rbd: get rid of rbd_{get,put}_dev() libceph: register request before unregister linger libceph: don't use rb_init_node() in ceph_osdc_alloc_request() libceph: init event->node in ceph_osdc_create_event() libceph: init osd->o_node in create_osd() libceph: report connection fault with warning libceph: socket can close in any connection state rbd: don't use ENOTSUPP rbd: remove linger unconditionally rbd: get rid of RBD_MAX_SEG_NAME_LEN libceph: avoid using freed osd in __kick_osd_requests() ceph: don't reference req after put rbd: do not allow remove of mounted-on image libceph: Unlock unprocessed pages in start_read() error path ceph: call handle_cap_grant() for cap import message ceph: Fix __ceph_do_pending_vmtruncate ceph: Don't add dirty inode to dirty list if caps is in migration ceph: Fix infinite loop in __wake_requests ceph: Don't update i_max_size when handling non-auth cap bdi_register: add __printf verification, fix arg mismatch ...
| * | libceph: register request before unregister lingerAlex Elder2012-12-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | In kick_requests(), we need to register the request before we unregister the linger request. Otherwise the unregister will reset the request's osd pointer to NULL. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | libceph: don't use rb_init_node() in ceph_osdc_alloc_request()Alex Elder2012-12-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The red-black node in the ceph osd request structure is initialized in ceph_osdc_alloc_request() using rbd_init_node(). We do need to initialize this, because in __unregister_request() we call RB_EMPTY_NODE(), which expects the node it's checking to have been initialized. But rb_init_node() is apparently overkill, and may in fact be on its way out. So use RB_CLEAR_NODE() instead. For a little more background, see this commit: 4c199a93 rbtree: empty nodes have no color" Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | libceph: init event->node in ceph_osdc_create_event()Alex Elder2012-12-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The red-black node node in the ceph osd event structure is not initialized in create_osdc_create_event(). Because this node can be the subject of a RB_EMPTY_NODE() call later on, we should ensure the node is initialized properly for that. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | libceph: init osd->o_node in create_osd()Alex Elder2012-12-201-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The red-black node node in the ceph osd structure is not initialized in create_osd(). Because this node can be the subject of a RB_EMPTY_NODE() call later on, we should ensure the node is initialized properly for that. Add a call to RB_CLEAR_NODE() initialize it. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | libceph: report connection fault with warningAlex Elder2012-12-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a connection's socket disconnects, or if there's a protocol error of some kind on the connection, a fault is signaled and the connection is reset (closed and reopened, basically). We currently get an error message on the log whenever this occurs. A ceph connection will attempt to reestablish a socket connection repeatedly if a fault occurs. This means that these error messages will get repeatedly added to the log, which is undesirable. Change the error message to be a warning, so they don't get logged by default. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | libceph: socket can close in any connection stateAlex Elder2012-12-171-17/+30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A connection's socket can close for any reason, independent of the state of the connection (and without irrespective of the connection mutex). As a result, the connectino can be in pretty much any state at the time its socket is closed. Handle those other cases at the top of con_work(). Pull this whole block of code into a separate function to reduce the clutter. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | rbd: remove linger unconditionallyAlex Elder2012-12-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In __unregister_linger_request(), the request is being removed from the osd client's req_linger list only when the request has a non-null osd pointer. It should be done whether or not the request currently has an osd. This is most likely a non-issue because I believe the request will always have an osd when this function is called. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | libceph: avoid using freed osd in __kick_osd_requests()Alex Elder2012-12-171-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If an osd has no requests and no linger requests, __reset_osd() will just remove it with a call to __remove_osd(). That drops a reference to the osd, and therefore the osd may have been free by the time __reset_osd() returns. That function offers no indication this may have occurred, and as a result the osd will continue to be used even when it's no longer valid. Change__reset_osd() so it returns an error (ENODEV) when it deletes the osd being reset. And change __kick_osd_requests() so it returns immediately (before referencing osd again) if __reset_osd() returns *any* error. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | ceph: don't reference req after putAlex Elder2012-12-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In __unregister_request(), there is a call to list_del_init() referencing a request that was the subject of a call to ceph_osdc_put_request() on the previous line. This is not safe, because the request structure could have been freed by the time we reach the list_del_init(). Fix this by reversing the order of these lines. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-off-by: Sage Weil <sage@inktank.com>
| * | libceph: remove 'osdtimeout' optionSage Weil2012-12-132-45/+5Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This would reset a connection with any OSD that had an outstanding request that was taking more than N seconds. The idea was that if the OSD was buggy, the client could compensate by resending the request. In reality, this only served to hide server bugs, and we haven't actually seen such a bug in quite a while. Moreover, the userspace client code never did this. More importantly, often the request is taking a long time because the OSD is trying to recover, or overloaded, and killing the connection and retrying would only make the situation worse by giving the OSD more work to do. Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
| * | libceph: define ceph_pg_pool_name_by_id()Alex Elder2012-11-011-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | Define and export function ceph_pg_pool_name_by_id() to supply the name of a pg pool whose id is given. This will be used by the next patch. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
| * | libceph: fix osdmap decode error pathsSage Weil2012-10-301-11/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | Ensure that we set the err value correctly so that we do not pass a 0 value to ERR_PTR and confuse the calling code. (In particular, osd_client.c handle_map() will BUG(!newmap)). Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
| * | libceph: avoid NULL kref_put from NULL alloc_msg returnSage Weil2012-10-261-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ceph_on_in_msg_alloc() method calls the ->alloc_msg() helper which may return NULL. It also drops con->mutex while it allocates a message, which means that the connection state may change (e.g., get closed). If that happens, we clean up and bail out. Avoid calling ceph_msg_put() on a NULL return value and triggering a crash. This was observed when an ->alloc_msg() call races with a timeout that resends a zillion messages and resets the connection, and ->alloc_msg() returns NULL (because the request was resent to another target). Fixes http://tracker.newdream.net/issues/3342 Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
| * | rbd: define common queue_con_delay()Alex Elder2012-10-101-15/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch defines a single function, queue_con_delay() to call queue_delayed_work() for a connection. It basically generalizes what was previously queue_con() by adding the delay argument. queue_con() is now a simple helper that passes 0 for its delay. queue_con_delay() returns 0 if it queued work or an errno if it did not for some reason. If con_work() finds the BACKOFF flag set for a connection, it now calls queue_con_delay() to handle arranging to start again after a delay. Note about connection reference counts: con_work() only ever gets called as a work item function. At the time that work is scheduled, a reference to the connection is acquired, and the corresponding con_work() call is then responsible for dropping that reference before it returns. Previously, the backoff handling inside con_work() silently handed off its reference to delayed work it scheduled. Now that queue_con_delay() is used, a new reference is acquired for the newly-scheduled work, and the original reference is dropped by the con->ops->put() call at the end of the function. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
| * | rbd: let con_work() handle backoffAlex Elder2012-10-101-18/+2Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Both ceph_fault() and con_work() include handling for imposing a delay before doing further processing on a faulted connection. The latter is used only if ceph_fault() is unable to. Instead, just let con_work() always be responsible for implementing the delay. After setting up the delay value, set the BACKOFF flag on the connection unconditionally and call queue_con() to ensure con_work() will get called to handle it. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
* | | Merge tag 'virtio-next-for-linus' of ↵Linus Torvalds2012-12-201-1/+2
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull virtio update from Rusty Russell: "Some nice cleanups, and even a patch my wife did as a "live" demo for Latinoware 2012. There's a slightly non-trivial merge in virtio-net, as we cleaned up the virtio add_buf interface while DaveM accepted the mq virtio-net patches." * tag 'virtio-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (27 commits) virtio_console: Add support for remoteproc serial virtio_console: Merge struct buffer_token into struct port_buffer virtio: add drv_to_virtio to make code clearly virtio: use dev_to_virtio wrapper in virtio virtio-mmio: Fix irq parsing in command line parameter virtio_console: Free buffers from out-queue upon close virtio: Convert dev_printk(KERN_<LEVEL> to dev_<level>( virtio_console: Use kmalloc instead of kzalloc virtio_console: Free buffer if splice fails virtio: tools: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: scsi: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: rpmsg: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: net: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: console: make it clear that virtqueue_add_buf() no longer returns > 0 virtio: make virtqueue_add_buf() returning 0 on success, not capacity. virtio: console: don't rely on virtqueue_add_buf() returning capacity. virtio_net: don't rely on virtqueue_add_buf() returning capacity. virtio-net: remove unused skb_vnet_hdr->num_sg field virtio-net: correct capacity math on ring full virtio: move queue_index and num_free fields into core struct virtqueue. ...
| * | | virtio: 9p: correctly pass physical address to userspace for high pagesWill Deacon2012-10-221-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using a virtio transport, the 9p net device may pass the physical address of a kernel buffer to userspace via a scatterlist inside a virtqueue. If the kernel buffer is mapped outside of the linear mapping (e.g. highmem), then virt_to_page will return a bogus value and we will populate the scatterlist with junk. This patch uses kmap_to_page when populating the page array for a kernel buffer. Cc: stable@kernel.org Cc: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
* | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds2012-12-2018-57/+121
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull networking fixes from David Miller: 1) Really fix tuntap SKB use after free bug, from Eric Dumazet. 2) Adjust SKB data pointer to point past the transport header before calling icmpv6_notify() so that the headers are in the state which that function expects. From Duan Jiong. 3) Fix ambiguities in the new tuntap multi-queue APIs. From Jason Wang. 4) mISDN needs to use del_timer_sync(), from Konstantin Khlebnikov. 5) Don't destroy mutex after freeing up device private in mac802154, fix also from Konstantin Khlebnikov. 6) Fix INET request socket leak in TCP and DCCP, from Christoph Paasch. 7) SCTP HMAC kconfig rework, from Neil Horman. 8) Fix SCTP jprobes function signature, otherwise things explode, from Daniel Borkmann. 9) Fix typo in ipv6-offload Makefile variable reference, from Simon Arlott. 10) Don't fail USBNET open just because remote wakeup isn't supported, from Oliver Neukum. 11) be2net driver bug fixes from Sathya Perla. 12) SOLOS PCI ATM driver bug fixes from Nathan Williams and David Woodhouse. 13) Fix MTU changing regression in 8139cp driver, from John Greene. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (45 commits) solos-pci: ensure all TX packets are aligned to 4 bytes solos-pci: add firmware upgrade support for new models solos-pci: remove superfluous debug output solos-pci: add GPIO support for newer versions on Geos board 8139cp: Prevent dev_close/cp_interrupt race on MTU change net: qmi_wwan: add ZTE MF880 drivers/net: Use of_match_ptr() macro in smsc911x.c drivers/net: Use of_match_ptr() macro in smc91x.c ipv6: addrconf.c: remove unnecessary "if" bridge: Correctly encode addresses when dumping mdb entries bridge: Do not unregister all PF_BRIDGE rtnl operations use generic usbnet_manage_power() usbnet: generic manage_power() usbnet: handle PM failure gracefully ksz884x: fix receive polling race condition qlcnic: update driver version qlcnic: fix unused variable warnings net: fec: forbid FEC_PTP on SoCs that do not support be2net: fix wrong frag_idx reported by RX CQ be2net: fix be_close() to ensure all events are ack'ed ...
| * | | | ipv6: addrconf.c: remove unnecessary "if"Cong Ding2012-12-191-2/+1Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the value of err is always negative if it goes to errout, so we don't need to check the value of err. Signed-off-by: Cong Ding <dinggnu@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | bridge: Correctly encode addresses when dumping mdb entriesVlad Yasevich2012-12-191-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When dumping mdb table, set the addresses the kernel returns based on the address protocol type. Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Acked-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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