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2018-08-17RDMA/smc: Replace ib_query_gid with rdma_get_gid_attrJason Gunthorpe
All RDMA ULPs should be using rdma_get_gid_attr instead of ib_query_gid. Convert SMC to use the new API. In the process correct some confusion with gid_type - if attr->ndev is !NULL then gid_type can never be IB_GID_TYPE_IB by definition. IB_GID_TYPE_ROCE shares the same enum value and is probably what was intended here. Reviewed-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-08-16Merge branch 'linus/master' into rdma.git for-nextJason Gunthorpe
rdma.git merge resolution for the 4.19 merge window Conflicts: drivers/infiniband/core/rdma_core.c - Use the rdma code and revise with the new spelling for atomic_fetch_add_unless drivers/nvme/host/rdma.c - Replace max_sge with max_send_sge in new blk code drivers/nvme/target/rdma.c - Use the blk code and revise to use NULL for ib_post_recv when appropriate - Replace max_sge with max_recv_sge in new blk code net/rds/ib_send.c - Use the net code and revise to use NULL for ib_post_recv when appropriate Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-08-16Revert "net/smc: Replace ib_query_gid with rdma_get_gid_attr"Jason Gunthorpe
This reverts commit ddb457c6993babbcdd41fca638b870d2a2fc3941. The include rdma/ib_cache.h is kept, and we have to add a memset to the compat wrapper to avoid compiler warnings in gcc-7 This revert is done to avoid extensive merge conflicts with SMC changes in netdev during the 4.19 merge window. Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-08-16Merge tag 'v4.18' into rdma.git for-nextJason Gunthorpe
Resolve merge conflicts from the -rc cycle against the rdma.git tree: Conflicts: drivers/infiniband/core/uverbs_cmd.c - New ifs added to ib_uverbs_ex_create_flow in -rc and for-next - Merge removal of file->ucontext in for-next with new code in -rc drivers/infiniband/core/uverbs_main.c - for-next removed code from ib_uverbs_write() that was modified in for-rc Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-08-10net/smc: send response to test link signalUrsula Braun
With SMC-D z/OS sends a test link signal every 10 seconds. Linux is supposed to answer, otherwise the SMC-D connection breaks. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-09Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Overlapping changes in RXRPC, changing to ktime_get_seconds() whilst adding some tracepoints. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-08net/smc: move sock lock in smc_ioctl()Ursula Braun
When an SMC socket is connecting it is decided whether fallback to TCP is needed. To avoid races between connect and ioctl move the sock lock before the use_fallback check. Reported-by: syzbot+5b2cece1a8ecb2ca77d8@syzkaller.appspotmail.com Reported-by: syzbot+19557374321ca3710990@syzkaller.appspotmail.com Fixes: 1992d99882af ("net/smc: take sock lock in smc_ioctl()") Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-08net/smc: allow sysctl rmem and wmem defaults for serversUrsula Braun
Without setsockopt SO_SNDBUF and SO_RCVBUF settings, the sysctl defaults net.ipv4.tcp_wmem and net.ipv4.tcp_rmem should be the base for the sizes of the SMC sndbuf and rcvbuf. Any TCP buffer size optimizations for servers should be ignored. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-08net/smc: no shutdown in state SMC_LISTENUrsula Braun
Invoking shutdown for a socket in state SMC_LISTEN does not make sense. Nevertheless programs like syzbot fuzzing the kernel may try to do this. For SMC this means a socket refcounting problem. This patch makes sure a shutdown call for an SMC socket in state SMC_LISTEN simply returns with -ENOTCONN. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-05Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Lots of overlapping changes, mostly trivial in nature. The mlxsw conflict was resolving using the example resolution at: https://github.com/jpirko/linux_mlxsw/blob/combined_queue/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-04net/smc: no cursor update send in state SMC_INITUrsula Braun
If a writer blocked condition is received without data, the current consumer cursor is immediately sent. Servers could already receive this condition in state SMC_INIT without finished tx-setup. This patch avoids sending a consumer cursor update in this case. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-30net: simplify sock_poll_waitChristoph Hellwig
The wait_address argument is always directly derived from the filp argument, so remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-25net/smc: improve delete link processingKarsten Graul
Send an orderly DELETE LINK request before termination of a link group, add support for client triggered DELETE LINK processing. And send a disorderly DELETE LINK before module is unloaded. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-25net/smc: provide fallback reason codeKarsten Graul
Remember the fallback reason code and the peer diagnosis code for smc sockets, and provide them in smc_diag.c to the netlink interface. And add more detailed reason codes. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-25net/smc: use correct vlan gid of RoCE deviceUrsula Braun
SMC code uses the base gid for VLAN traffic. The gids exchanged in the CLC handshake and the gid index used for the QP have to switch from the base gid to the appropriate vlan gid. When searching for a matching IB device port for a certain vlan device, it does not make sense to return an IB device port, which is not enabled for the used vlan_id. Add another check whether a vlan gid exists for a certain IB device port. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-25net/smc: fewer parameters for smc_llc_send_confirm_link()Ursula Braun
Link confirmation will always be sent across the new link being confirmed. This allows to shrink the parameter list. No functional change. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-24net/smc: Simplify ib_post_(send|recv|srq_recv)() callsBart Van Assche
Instead of declaring and passing a dummy 'bad_wr' pointer, pass NULL as third argument to ib_post_(send|recv|srq_recv)(). Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Acked-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-24net/smc: Remove a WARN_ON() statementBart Van Assche
Remove a WARN_ON() statement that verifies something that is guaranteed by the RDMA API, namely that the failed_wr pointer is not touched if an ib_post_send() call succeeds and that it points at the failed wr if an ib_post_send() call fails. Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com> Acked-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-07-23net/smc: remove local variable page in smc_rx_splice()Ursula Braun
The page map address is already stored in the RMB descriptor. There is no need to derive it from the cpu_addr value. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-23net/smc: use DECLARE_BITMAP for rtokens_used_maskUrsula Braun
Link group field tokens_used_mask is a bitmap. Use macro DECLARE_BITMAP for its definition. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-23net/smc: add function to get link group from linkStefan Raspl
Replace a frequently used construct with a more readable variant, reducing the code. Also might come handy when we start to support more than a single per link group. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-23net/smc: eliminate cursor read and write callsStefan Raspl
The functions to read and write cursors are exclusively used to copy cursors. Therefore switch to a respective function instead. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-23net/smc: provide smc mode in smc_diag.cKarsten Graul
Rename field diag_fallback into diag_mode and set the smc mode of a connection explicitly. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-20Merge ra.kernel.org:/pub/scm/linux/kernel/git/torvalds/linuxDavid S. Miller
All conflicts were trivial overlapping changes, so reasonably easy to resolve. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-18Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: "Lots of fixes, here goes: 1) NULL deref in qtnfmac, from Gustavo A. R. Silva. 2) Kernel oops when fw download fails in rtlwifi, from Ping-Ke Shih. 3) Lost completion messages in AF_XDP, from Magnus Karlsson. 4) Correct bogus self-assignment in rhashtable, from Rishabh Bhatnagar. 5) Fix regression in ipv6 route append handling, from David Ahern. 6) Fix masking in __set_phy_supported(), from Heiner Kallweit. 7) Missing module owner set in x_tables icmp, from Florian Westphal. 8) liquidio's timeouts are HZ dependent, fix from Nicholas Mc Guire. 9) Link setting fixes for sh_eth and ravb, from Vladimir Zapolskiy. 10) Fix NULL deref when using chains in act_csum, from Davide Caratti. 11) XDP_REDIRECT needs to check if the interface is up and whether the MTU is sufficient. From Toshiaki Makita. 12) Net diag can do a double free when killing TCP_NEW_SYN_RECV connections, from Lorenzo Colitti. 13) nf_defrag in ipv6 can unnecessarily hold onto dst entries for a full minute, delaying device unregister. From Eric Dumazet. 14) Update MAC entries in the correct order in ixgbe, from Alexander Duyck. 15) Don't leave partial mangles bpf program in jit_subprogs, from Daniel Borkmann. 16) Fix pfmemalloc SKB state propagation, from Stefano Brivio. 17) Fix ACK handling in DCTCP congestion control, from Yuchung Cheng. 18) Use after free in tun XDP_TX, from Toshiaki Makita. 19) Stale ipv6 header pointer in ipv6 gre code, from Prashant Bhole. 20) Don't reuse remainder of RX page when XDP is set in mlx4, from Saeed Mahameed. 21) Fix window probe handling of TCP rapair sockets, from Stefan Baranoff. 22) Missing socket locking in smc_ioctl(), from Ursula Braun. 23) IPV6_ILA needs DST_CACHE, from Arnd Bergmann. 24) Spectre v1 fix in cxgb3, from Gustavo A. R. Silva. 25) Two spots in ipv6 do a rol32() on a hash value but ignore the result. Fixes from Colin Ian King" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (176 commits) tcp: identify cryptic messages as TCP seq # bugs ptp: fix missing break in switch hv_netvsc: Fix napi reschedule while receive completion is busy MAINTAINERS: Drop inactive Vitaly Bordug's email net: cavium: Add fine-granular dependencies on PCI net: qca_spi: Fix log level if probe fails net: qca_spi: Make sure the QCA7000 reset is triggered net: qca_spi: Avoid packet drop during initial sync ipv6: fix useless rol32 call on hash ipv6: sr: fix useless rol32 call on hash net: sched: Using NULL instead of plain integer net: usb: asix: replace mii_nway_restart in resume path net: cxgb3_main: fix potential Spectre v1 lib/rhashtable: consider param->min_size when setting initial table size net/smc: reset recv timeout after clc handshake net/smc: add error handling for get_user() net/smc: optimize consumer cursor updates net/nfc: Avoid stalls when nfc_alloc_send_skb() returned NULL. ipv6: ila: select CONFIG_DST_CACHE net: usb: rtl8150: demote allmulti message to dev_dbg() ...
2018-07-18net/smc: reset recv timeout after clc handshakeKarsten Graul
During clc handshake the receive timeout is set to CLC_WAIT_TIME. Remember and reset the original timeout value after the receive calls, and remove a duplicate assignment of CLC_WAIT_TIME. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-18net/smc: add error handling for get_user()Ursula Braun
For security reasons the return code of get_user() should always be checked. Fixes: 01d2f7e2cdd31 ("net/smc: sockopts TCP_NODELAY and TCP_CORK") Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-18net/smc: optimize consumer cursor updatesUrsula Braun
The SMC protocol requires to send a separate consumer cursor update, if it cannot be piggybacked to updates of the producer cursor. Currently the decision to send a separate consumer cursor update just considers the amount of data already received by the socket program. It does not consider the amount of data already arrived, but not yet consumed by the receiver. Basing the decision on the difference between already confirmed and already arrived data (instead of difference between already confirmed and already consumed data), may lead to a somewhat earlier consumer cursor update send in fast unidirectional traffic scenarios, and thus to better throughput. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-16net/smc: take sock lock in smc_ioctl()Ursula Braun
SMC ioctl processing requires the sock lock to work properly in all thinkable scenarios. Problem has been found with RaceFuzzer and fixes: KASAN: null-ptr-deref Read in smc_ioctl Reported-by: Byoungyoung Lee <lifeasageek@gmail.com> Reported-by: syzbot+35b2c5aa76fd398b9fd4@syzkaller.appspotmail.com Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-07net/smc: reduce sock_put() for fallback socketsUrsula Braun
smc_release() calls a sock_put() for smc fallback sockets to cover the passive closing sock_hold() in __smc_connect() and smc_tcp_listen_work(). This does not make sense for sockets in state SMC_LISTEN and SMC_INIT. An SMC socket stays in state SMC_INIT if connect fails. The sock_put in smc_connect_abort() does not cover all failures. Move it into smc_connect_decline_fallback(). Fixes: ee9dfbef02d18 ("net/smc: handle sockopts forcing fallback") Reported-by: syzbot+3a0748c8f2f210c0ef9b@syzkaller.appspotmail.com Reported-by: syzbot+9e60d2428a42049a592a@syzkaller.appspotmail.com Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-03net/smc: fix up merge error with poll changesLinus Torvalds
My networking merge (commit 4e33d7d47943: "Pull networking fixes from David Miller") got the poll() handling conflict wrong for af_smc. The conflict between my a11e1d432b51 ("Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL") and Ursula Braun's 24ac3a08e658 ("net/smc: rebuild nonblocking connect") should have left the call to sock_poll_wait() in place, just without the socket lock release/retake. And I really should have realized that. But happily, I at least asked Ursula to double-check the merge, and she set me right. This also fixes an incidental whitespace issue nearby that annoyed me while looking at this. Pointed-out-by: Ursula Braun <ubraun@linux.ibm.com> Cc: David Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-07-03Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Simple overlapping changes in stmmac driver. Adjust skb_gro_flush_final_remcsum function signature to make GRO list changes in net-next, as per Stephen Rothwell's example merge resolution. Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Verify netlink attributes properly in nf_queue, from Eric Dumazet. 2) Need to bump memory lock rlimit for test_sockmap bpf test, from Yonghong Song. 3) Fix VLAN handling in lan78xx driver, from Dave Stevenson. 4) Fix uninitialized read in nf_log, from Jann Horn. 5) Fix raw command length parsing in mlx5, from Alex Vesker. 6) Cleanup loopback RDS connections upon netns deletion, from Sowmini Varadhan. 7) Fix regressions in FIB rule matching during create, from Jason A. Donenfeld and Roopa Prabhu. 8) Fix mpls ether type detection in nfp, from Pieter Jansen van Vuuren. 9) More bpfilter build fixes/adjustments from Masahiro Yamada. 10) Fix XDP_{TX,REDIRECT} flushing in various drivers, from Jesper Dangaard Brouer. 11) fib_tests.sh file permissions were broken, from Shuah Khan. 12) Make sure BH/preemption is disabled in data path of mac80211, from Denis Kenzior. 13) Don't ignore nla_parse_nested() return values in nl80211, from Johannes berg. 14) Properly account sock objects ot kmemcg, from Shakeel Butt. 15) Adjustments to setting bpf program permissions to read-only, from Daniel Borkmann. 16) TCP Fast Open key endianness was broken, it always took on the host endiannness. Whoops. Explicitly make it little endian. From Yuching Cheng. 17) Fix prefix route setting for link local addresses in ipv6, from David Ahern. 18) Potential Spectre v1 in zatm driver, from Gustavo A. R. Silva. 19) Various bpf sockmap fixes, from John Fastabend. 20) Use after free for GRO with ESP, from Sabrina Dubroca. 21) Passing bogus flags to crypto_alloc_shash() in ipv6 SR code, from Eric Biggers. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (87 commits) qede: Adverstise software timestamp caps when PHC is not available. qed: Fix use of incorrect size in memcpy call. qed: Fix setting of incorrect eswitch mode. qed: Limit msix vectors in kdump kernel to the minimum required count. ipvlan: call dev_change_flags when ipvlan mode is reset ipv6: sr: fix passing wrong flags to crypto_alloc_shash() net: fix use-after-free in GRO with ESP tcp: prevent bogus FRTO undos with non-SACK flows bpf: sockhash, add release routine bpf: sockhash fix omitted bucket lock in sock_close bpf: sockmap, fix smap_list_map_remove when psock is in many maps bpf: sockmap, fix crash when ipv6 sock is added net: fib_rules: bring back rule_exists to match rule during add hv_netvsc: split sub-channel setup into async and sync net: use dev_change_tx_queue_len() for SIOCSIFTXQLEN atm: zatm: Fix potential Spectre v1 s390/qeth: consistently re-enable device features s390/qeth: don't clobber buffer on async TX completion s390/qeth: avoid using is_multicast_ether_addr_64bits on (u8 *)[6] s390/qeth: fix race when setting MAC address ...
2018-06-30net/smc: add SMC-D diag supportHans Wippel
This patch adds diag support for SMC-D. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-30net/smc: add SMC-D support in af_smcHans Wippel
This patch ties together the previous SMC-D patches. It adds support for SMC-D to the listen and connect functions and, thus, enables SMC-D support in the SMC code. If a connection supports both SMC-R and SMC-D, SMC-D is preferred. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-30net/smc: add SMC-D support in data transferHans Wippel
The data transfer and CDC message headers differ in SMC-R and SMC-D. This patch adds support for the SMC-D data transfer to the existing SMC code. It consists of the following: * SMC-D CDC support * SMC-D tx support * SMC-D rx support The CDC header is stored at the beginning of the receive buffer. Thus, a rx_offset variable is added for the CDC header offset within the buffer (0 for SMC-R). Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-30net/smc: add SMC-D support in CLC messagesHans Wippel
There are two types of SMC: SMC-R and SMC-D. These types are signaled within the CLC messages during the CLC handshake. This patch adds support for and checks of the SMC type. Also, SMC-R and SMC-D need to exchange different information during the CLC handshake. So, this patch extends the current message formats to support the SMC-D header fields. The Proposal message can contain both SMC-R and SMC-D information. The Accept and Confirm messages contain either SMC-R or SMC-D information. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-30net/smc: add pnetid support for SMC-D and ISMHans Wippel
SMC-D relies on PNETIDs to find usable SMC-D/ISM devices for a SMC connection. This patch adds SMC-D/ISM support to the current PNETID implementation. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-30net/smc: add base infrastructure for SMC-D and ISMHans Wippel
SMC supports two variants: SMC-R and SMC-D. For data transport, SMC-R uses RDMA devices, SMC-D uses so-called Internal Shared Memory (ISM) devices. An ISM device only allows shared memory communication between SMC instances on the same machine. For example, this allows virtual machines on the same host to communicate via SMC without RDMA devices. This patch adds the base infrastructure for SMC-D and ISM devices to the existing SMC code. It contains the following: * ISM driver interface: This interface allows an ISM driver to register ISM devices in SMC. In the process, the driver provides a set of device ops for each device. SMC uses these ops to execute SMC specific operations on or transfer data over the device. * Core SMC-D link group, connection, and buffer support: Link groups, SMC connections and SMC buffers (in smc_core) are extended to support SMC-D. * SMC type checks: Some type checks are added to prevent using SMC-R specific code for SMC-D and vice versa. To actually use SMC-D, additional changes to pnetid, CLC, CDC, etc. are required. These are added in follow-up patches. Signed-off-by: Hans Wippel <hwippel@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-30net/smc: optimize consumer cursor updatesUrsula Braun
The SMC protocol requires to send a separate consumer cursor update, if it cannot be piggybacked to updates of the producer cursor. Currently the decision to send a separate consumer cursor update just considers the amount of data already received by the socket program. It does not consider the amount of data already arrived, but not yet consumed by the receiver. Basing the decision on the difference between already confirmed and already arrived data (instead of difference between already confirmed and already consumed data), may lead to a somewhat earlier consumer cursor update send in fast unidirectional traffic scenarios, and thus to better throughput. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Suggested-by: Thomas Richter <tmricht@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-30net/smc: add pnetid supportUrsula Braun
s390 hardware supports the definition of a so-call Physical NETwork IDentifier (short PNETID) per network device port. These PNETIDS can be used to identify network devices that are attached to the same physical network (broadcast domain). On s390 try to use the PNETID of the ethernet device port used for initial connecting, and derive the IB device port used for SMC RDMA traffic. On platforms without PNETID support fall back to the existing solution of a configured pnet table. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-30net/smc: determine port attributes independent from pnet tableUrsula Braun
For SMC it is important to know the current port state of RoCE devices. Monitoring port states has been triggered, when a RoCE device was added to the pnet table. To support future alternatives to the pnet table the monitoring of ports is made independent of the existence of a pnet table. It starts once the smc_ib_device is established. Due to this change smc_ib_remember_port_attr() is now a local function and shuffling its location and the location of its used functions makes any forward references obsolete. And the duplicate SMC_MAX_PORTS definition is removed. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-28Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLLLinus Torvalds
The poll() changes were not well thought out, and completely unexplained. They also caused a huge performance regression, because "->poll()" was no longer a trivial file operation that just called down to the underlying file operations, but instead did at least two indirect calls. Indirect calls are sadly slow now with the Spectre mitigation, but the performance problem could at least be largely mitigated by changing the "->get_poll_head()" operation to just have a per-file-descriptor pointer to the poll head instead. That gets rid of one of the new indirections. But that doesn't fix the new complexity that is completely unwarranted for the regular case. The (undocumented) reason for the poll() changes was some alleged AIO poll race fixing, but we don't make the common case slower and more complex for some uncommon special case, so this all really needs way more explanations and most likely a fundamental redesign. [ This revert is a revert of about 30 different commits, not reverted individually because that would just be unnecessarily messy - Linus ] Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-28net/smc: rebuild nonblocking connectUrsula Braun
The recent poll change may lead to stalls for non-blocking connecting SMC sockets, since sock_poll_wait is no longer performed on the internal CLC socket, but on the outer SMC socket. kernel_connect() on the internal CLC socket returns with -EINPROGRESS, but the wake up logic does not work in all cases. If the internal CLC socket is still in state TCP_SYN_SENT when polled, sock_poll_wait() from sock_poll() does not sleep. It is supposed to sleep till the state of the internal CLC socket switches to TCP_ESTABLISHED. This problem triggered a redesign of the SMC nonblocking connect logic. This patch introduces a connect worker covering all connect steps followed by a wake up of socket waiters. It allows to get rid of all delays and locks in smc_poll(). Fixes: c0129a061442 ("smc: convert to ->poll_mask") Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-18net/smc: Replace ib_query_gid with rdma_get_gid_attrParav Pandit
Push the copy of the gid_attr into the SMC code. This probably doesn't push it far enough, as it looks like the conn->lgr should potentially hold the reference for its lifetime. Signed-off-by: Parav Pandit <parav@mellanox.com> Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
2018-06-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Various netfilter fixlets from Pablo and the netfilter team. 2) Fix regression in IPVS caused by lack of PMTU exceptions on local routes in ipv6, from Julian Anastasov. 3) Check pskb_trim_rcsum for failure in DSA, from Zhouyang Jia. 4) Don't crash on poll in TLS, from Daniel Borkmann. 5) Revert SO_REUSE{ADDR,PORT} change, it regresses various things including Avahi mDNS. From Bart Van Assche. 6) Missing of_node_put in qcom/emac driver, from Yue Haibing. 7) We lack checking of the TCP checking in one special case during SYN receive, from Frank van der Linden. 8) Fix module init error paths of mac80211 hwsim, from Johannes Berg. 9) Handle 802.1ad properly in stmmac driver, from Elad Nachman. 10) Must grab HW caps before doing quirk checks in stmmac driver, from Jose Abreu. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (81 commits) net: stmmac: Run HWIF Quirks after getting HW caps neighbour: skip NTF_EXT_LEARNED entries during forced gc net: cxgb3: add error handling for sysfs_create_group tls: fix waitall behavior in tls_sw_recvmsg tls: fix use-after-free in tls_push_record l2tp: filter out non-PPP sessions in pppol2tp_tunnel_ioctl() l2tp: reject creation of non-PPP sessions on L2TPv2 tunnels mlxsw: spectrum_switchdev: Fix port_vlan refcounting mlxsw: spectrum_router: Align with new route replace logic mlxsw: spectrum_router: Allow appending to dev-only routes ipv6: Only emit append events for appended routes stmmac: added support for 802.1ad vlan stripping cfg80211: fix rcu in cfg80211_unregister_wdev mac80211: Move up init of TXQs mac80211_hwsim: fix module init error paths cfg80211: initialize sinfo in cfg80211_get_station nl80211: fix some kernel doc tag mistakes hv_netvsc: Fix the variable sizes in ipsecv2 and rsc offload rds: avoid unenecessary cong_update in loop transport l2tp: clean up stale tunnel or session in pppol2tp_connect's error path ...
2018-06-12treewide: kzalloc() -> kcalloc()Kees Cook
The kzalloc() function has a 2-factor argument form, kcalloc(). This patch replaces cases of: kzalloc(a * b, gfp) with: kcalloc(a * b, gfp) as well as handling cases of: kzalloc(a * b * c, gfp) with: kzalloc(array3_size(a, b, c), gfp) as it's slightly less ugly than: kzalloc_array(array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: kzalloc(4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ type TYPE; expression THING, E; @@ ( kzalloc( - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | kzalloc( - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression COUNT; typedef u8; typedef __u8; @@ ( kzalloc( - sizeof(u8) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(__u8) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(char) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(unsigned char) * (COUNT) + COUNT , ...) | kzalloc( - sizeof(u8) * COUNT + COUNT , ...) | kzalloc( - sizeof(__u8) * COUNT + COUNT , ...) | kzalloc( - sizeof(char) * COUNT + COUNT , ...) | kzalloc( - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - kzalloc + kcalloc ( - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ identifier SIZE, COUNT; @@ - kzalloc + kcalloc ( - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( kzalloc( - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | kzalloc( - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | kzalloc( - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( kzalloc( - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | kzalloc( - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc( - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | kzalloc( - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ identifier STRIDE, SIZE, COUNT; @@ ( kzalloc( - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | kzalloc( - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression E1, E2, E3; constant C1, C2, C3; @@ ( kzalloc(C1 * C2 * C3, ...) | kzalloc( - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | kzalloc( - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | kzalloc( - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | kzalloc( - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( kzalloc(sizeof(THING) * C2, ...) | kzalloc(sizeof(TYPE) * C2, ...) | kzalloc(C1 * C2 * C3, ...) | kzalloc(C1 * C2, ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - kzalloc + kcalloc ( - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - kzalloc + kcalloc ( - (E1) * E2 + E1, E2 , ...) | - kzalloc + kcalloc ( - (E1) * (E2) + E1, E2 , ...) | - kzalloc + kcalloc ( - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12smc: convert to ->poll_maskCong Wang
smc->clcsock is an internal TCP socket, after TCP socket converts to ->poll_mask, ->poll doesn't exist any more. So just convert smc socket to ->poll_mask too. Fixes: 2c7d3dacebd4 ("net/tcp: convert to ->poll_mask") Reported-by: syzbot+f5066e369b2d5fff630f@syzkaller.appspotmail.com Cc: Christoph Hellwig <hch@lst.de> Cc: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-06-03net/smc: fix error return code in smc_setsockopt()Wei Yongjun
Fix to return error code -EINVAL instead of 0 if optlen is invalid. Fixes: 01d2f7e2cdd3 ("net/smc: sockopts TCP_NODELAY and TCP_CORK") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-23net/smc: longer delay when freeing client link groupsUrsula Braun
Client link group creation always follows the server linkgroup creation. If peer creates a new server link group, client has to create a new client link group. If peer reuses a server link group for a new connection, client has to reuse its client link group as well. To avoid out-of-sync conditions for link groups a longer delay for for client link group removal is defined to make sure this link group still exists, once the peer decides to reuse a server link group. Currently the client link group delay time is just 10 jiffies larger than the server link group delay time. This patch increases the delay difference to 10 seconds to have a better protection against out-of-sync link groups. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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