- 19 Feb, 2018 1 commit
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Andrea Parri authored
Because READ_ONCE() now implies smp_read_barrier_depends(), the smp_read_barrier_depends() in __ptr_ring_consume() is redundant; this commit removes it and updates the comments. Signed-off-by:
Andrea Parri <parri.andrea@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: John Fastabend <john.fastabend@gmail.com> Cc: Eric Dumazet <edumazet@google.com> Cc: <linux-kernel@vger.kernel.org> Cc: <netdev@vger.kernel.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 16 Feb, 2018 39 commits
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Sabrina Dubroca authored
Signed-off-by:
Sabrina Dubroca <sd@queasysnail.net> Reviewed-by:
Stefano Brivio <sbrivio@redhat.com> Signed-off-by:
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David Ahern authored
Only allow ifindex from IP_PKTINFO to override SO_BINDTODEVICE settings if the index is actually set in the message. Signed-off-by:
David Ahern <dsahern@gmail.com> Signed-off-by:
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Colin Ian King authored
The shifting of timehi by 16 bits to the left will be promoted to a 32 bit signed int and then sign-extended to an u64. If the top bit of timehi is set then all then all the upper bits of ns end up as also being set because of the sign-extension. Fix this by making timehi and timelo u64. Also move the declaration of ns. Detected by CoverityScan, CID#1465288 ("Unintended sign extension") Fixes: c6fe0ad2 ("net: dsa: mv88e6xxx: add rx/tx timestamping support") Signed-off-by:Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Niklas Söderlund authored
Allow for changing the MTU within the limit of the maximum size of a descriptor (2048 bytes). Add the callback to change MTU from user-space and take the configurable MTU into account when configuring the hardware. Signed-off-by:
Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by:
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David S. Miller authored
Jakub Kicinski says: ==================== nfp: whitespace sync and flower TCP flags Whitespace cleanup from Michael and flower offload support for matching on TCP flags from Pieter. ==================== Signed-off-by: -
Pieter Jansen van Vuuren authored
Implement tcp flag match offloading. Current tcp flag match support include FIN, SYN, RST, PSH and URG flags, other flags are unsupported. The PSH and URG flags are only set in the hardware fast path when used in combination with the SYN, RST and PSH flags. Signed-off-by:
Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com> Reviewed-by:
John Hurley <john.hurley@netronome.com> Reviewed-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by:
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Michael Rapson authored
The nfp_net_ctrl.h file used spaces for indentation in the past but tabs have crept in. Host driver files use tabs for indentation by default, so let's convert to tabs for consistency across the file and our drivers. Signed-off-by:
Michael Rapson <michael.rapson@netronome.com> Acked-by:
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David S. Miller authored
Alexander Aring says: ==================== net: sched: act: add extack support this patch series adds extack support for the TC action subsystem. As example I for the extack support in a TC action I choosed mirred action. - Alex Cc: David Ahern <dsahern@gmail.com> changes since v3: - adapt recommended changes from Davide Caratti, please check if I catch everything. Thanks. changes since v2: - remove newline in extack of generic walker handling Thanks to Davide Caratti - add kernel@mojatatu.com in cc ==================== Signed-off-by: -
Alexander Aring authored
This patch adds extack support for TC mirred action. Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
Alexander Aring <aring@mojatatu.com> Signed-off-by:
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Alexander Aring authored
This patch adds extack handling for a common used TC act function "tcf_generic_walker()" to add an extack message on failures. The tcf_generic_walker() function can fail if get a invalid command different than DEL and GET. The naming "action" here is wrong, the correct naming would be command. Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
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Alexander Aring authored
This patch adds extack support for act walker callback api. This prepares to handle extack support inside each specific act implementation. Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
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Alexander Aring authored
This patch adds extack support for act lookup callback api. This prepares to handle extack support inside each specific act implementation. Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
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Alexander Aring authored
This patch adds extack support for act init callback api. This prepares to handle extack support inside each specific act implementation. Based on work by David Ahern <dsahern@gmail.com> Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
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Alexander Aring authored
This patch adds extack support for generic act handling. The extack will be set deeper to each called function which is not part of netdev core api. Based on work by David Ahern <dsahern@gmail.com> Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
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Alexander Aring authored
This patch adds extack to tcf_action_init and tcf_action_init_1 functions. These are necessary to make individual extack handling in each act implementation. Based on work by David Ahern <dsahern@gmail.com> Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
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Alexander Aring authored
This patch is used by subsequent patches. It fixes code style issues caught by checkpatch. Signed-off-by:
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David S. Miller authored
Sowmini Varadhan says: ==================== RDS: zerocopy support This is version 3 of the series, following up on review comments for http://patchwork.ozlabs.org/project/netdev/list/?series=28530 Review comments addressed Patch 4 - fix fragile use of skb->cb[], do not set ee_code incorrectly. Patch 5: - remove needless bzero of skb->cb[], consolidate err cleanup A brief overview of this feature follows. This patch series provides support for MSG_ZERCOCOPY on a PF_RDS socket based on the APIs and infrastructure added by Commit f214f915 ("tcp: enable MSG_ZEROCOPY") For single threaded rds-stress testing using rds-tcp with the ixgbe driver using 1M message sizes (-a 1M -q 1M) preliminary results show that there is a significant reduction in latency: about 90 usec with zerocopy, compared with 200 usec without zerocopy. This patchset modifies the above for zerocopy in the following manner. - if the MSG_ZEROCOPY flag is specified with rds_sendmsg(), and, - if the SO_ZEROCOPY socket option has been set on the PF_RDS socket, application pages sent down with rds_sendmsg are pinned. The pinning uses the accounting infrastructure added by a91dbff5 ("sock: ulimit on MSG_ZEROCOPY pages"). The message is unpinned when all references to the message go down to 0, and the message is freed by rds_message_purge. A multithreaded application using this infrastructure must send down a unique 32 bit cookie as ancillary data with each sendmsg invocation. The format of this ancillary data is described in Patch 5 of the series. The cookie is passed up to the application on the sk_error_queue when the message is unpinned, indicating to the application that it is now safe to free/reuse the message buffer. The details of the completion notification are provided in Patch 4 of this series. ==================== Signed-off-by:
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Sowmini Varadhan authored
Send a cookie with sendmsg() on PF_RDS sockets, and process the returned batched cookies in do_recv_completion() Signed-off-by:
Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by:
Willem de Bruijn <willemb@google.com> Signed-off-by:
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Sowmini Varadhan authored
Add support for basic PF_RDS client-server testing in msg_zerocopy Signed-off-by:
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Sowmini Varadhan authored
If the MSG_ZEROCOPY flag is specified with rds_sendmsg(), and, if the SO_ZEROCOPY socket option has been set on the PF_RDS socket, application pages sent down with rds_sendmsg() are pinned. The pinning uses the accounting infrastructure added by Commit a91dbff5 ("sock: ulimit on MSG_ZEROCOPY pages") The payload bytes in the message may not be modified for the duration that the message has been pinned. A multi-threaded application using this infrastructure may thus need to be notified about send-completion so that it can free/reuse the buffers passed to rds_sendmsg(). Notification of send-completion will identify each message-buffer by a cookie that the application must specify as ancillary data to rds_sendmsg(). The ancillary data in this case has cmsg_level == SOL_RDS and cmsg_type == RDS_CMSG_ZCOPY_COOKIE. Signed-off-by:
Santosh Shilimkar <santosh.shilimkar@oracle.com> Acked-by:
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Sowmini Varadhan authored
RDS removes a datagram (rds_message) from the retransmit queue when an ACK is received. The ACK indicates that the receiver has queued the RDS datagram, so that the sender can safely forget the datagram. When all references to the rds_message are quiesced, rds_message_purge is called to release resources used by the rds_message If the datagram to be removed had pinned pages set up, add an entry to the rs->rs_znotify_queue so that the notifcation will be sent up via rds_rm_zerocopy_callback() when the rds_message is eventually freed by rds_message_purge. rds_rm_zerocopy_callback() attempts to batch the number of cookies sent with each notification to a max of SO_EE_ORIGIN_MAX_ZCOOKIES. This is achieved by checking the tail skb in the sk_error_queue: if this has room for one more cookie, the cookie from the current notification is added; else a new skb is added to the sk_error_queue. Every invocation of rds_rm_zerocopy_callback() will trigger a ->sk_error_report to notify the application. Signed-off-by:
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Sowmini Varadhan authored
allow the application to set SO_ZEROCOPY on the underlying sk of a PF_RDS socket Signed-off-by:
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Sowmini Varadhan authored
The existing model holds a reference from the rds_sock to the rds_message, but the rds_message does not itself hold a sock_put() on the rds_sock. Instead the m_rs field in the rds_message is assigned when the message is queued on the sock, and nulled when the message is dequeued from the sock. We want to be able to notify userspace when the rds_message is actually freed (from rds_message_purge(), after the refcounts to the rds_message go to 0). At the time that rds_message_purge() is called, the message is no longer on the rds_sock retransmit queue. Thus the explicit reference for the m_rs is needed to send a notification that will signal to userspace that it is now safe to free/reuse any pages that may have been pinned down for zerocopy. This patch manages the m_rs assignment in the rds_message with the necessary refcount book-keeping. Signed-off-by:
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Sowmini Varadhan authored
RDS would like to use the helper functions for managing pinned pages added by Commit a91dbff5 ("sock: ulimit on MSG_ZEROCOPY pages") Signed-off-by:
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David S. Miller authored
It was mis-applied and the changes had rejects. Signed-off-by: -
David S. Miller authored
Alexander Aring says: ==================== net: sched: act: add extack support this patch series adds extack support for the TC action subsystem. As example I for the extack support in a TC action I choosed mirred action. - Alex Cc: David Ahern <dsahern@gmail.com> changes since v3: - adapt recommended changes from Davide Caratti, please check if I catch everything. Thanks. changes since v2: - remove newline in extack of generic walker handling Thanks to Davide Caratti - add kernel@mojatatu.com in cc ==================== Signed-off-by: -
Alexander Aring authored
This patch adds extack to tcf_action_init and tcf_action_init_1 functions. These are necessary to make individual extack handling in each act implementation. Based on work by David Ahern <dsahern@gmail.com> Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
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Alexander Aring authored
This patch is used by subsequent patches. It fixes code style issues caught by checkpatch. Signed-off-by:
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Davide Caratti authored
When tca_action_flush() calls the action walk() and gets an error, a successful call to nla_nest_start() is not followed by a call to nla_nest_cancel(). It's harmless, as the skb is freed in the error path - but it's worth to fix this unbalance. Signed-off-by:
Davide Caratti <dcaratti@redhat.com> Signed-off-by:
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David S. Miller authored
Andrew Lunn says: ==================== net: dsa: mv88e6xxx: Improve PTP access latency PTP needs to retrieve the hardware timestamps from the switch device in a low latency manor. However ethtool -S and bridge fdb show can hold the switch register access mutex for a long time. These patches changes the reading the statistics and the ATU so that the mutex is released and taken again between each statistic or ATU entry. The PTP code can then interleave its access to the hardware, keeping its latency low. ==================== Signed-off-by: -
Andrew Lunn authored
The PTP code needs low latency access to the PTP hardware timestamps. Reading all the ATU entries in one go adds a lot of latency to the PTP code. So take and release the reg_lock mutex for each individual MAC address in the ATU, allowing the PTP thread jump in between. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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Andrew Lunn authored
The PTP code needs low latency access to the PTP hardware timestamps. Reading all the statistics in one go adds a lot of latency to the PTP code. So take and release the reg_lock mutex for each individual statistics, allowing the PTP thread jump in between. Signed-off-by:
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David S. Miller authored
Jon Maloy says: ==================== tipc: de-generealize topology server The topology server is partially based on a template that is much more generic than what we need. This results in a code that is unnecessarily hard to follow and keeping bug free. We now take the consequence of the fact that we only have one such server in TIPC, - with no prospects for introducing any more, and adapt the code to the specialized task is really is doing. ==================== Signed-off-by: -
Jon Maloy authored
We rename struct tipc_server to struct tipc_topsrv. This reflect its now specialized role as topology server. Accoringly, we change or add function prefixes to make it clearer which functionality those belong to. There are no functional changes in this commit. Acked-by:
Ying.Xue <ying.xue@windriver.com> Signed-off-by:
Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
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Jon Maloy authored
We move the listener socket to struct tipc_server and give it its own work item. This makes it easier to follow the code, and entails some simplifications in the reception code in subscriber sockets. Acked-by:
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Jon Maloy authored
In order to narrow the interface and dependencies between the topology server and the subscription/binding table functionality we move struct tipc_server inside the file server.c. This requires some code adaptations in other files, but those are mostly minor. The most important change is that we have to move the start/stop functions for the topology server to server.c, where they logically belong anyway. Acked-by:
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Jon Maloy authored
Since we now have removed struct tipc_subscriber from the code, and only struct tipc_subscription remains, there is no longer need for long and awkward prefixes to distinguish between their pertaining functions. We now change all tipc_subscrp_* prefixes to tipc_sub_*. This is a purely cosmetic change. Acked-by:
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Jon Maloy authored
After the previous changes it becomes logical to collapse the two-level creation of subscription instances into one. We do that here. We also rename the creation and deletion functions for more consistency. Acked-by:
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Jon Maloy authored
Because of the requirement for total distribution transparency, users send subscriptions and receive topology events in their own host format. It is up to the topology server to determine this format and do the correct conversions to and from its own host format when needed. Until now, this has been handled in a rather non-transparent way inside the topology server and subscriber code, leading to unnecessary complexity when creating subscriptions and issuing events. We now improve this situation by adding two new macros, tipc_sub_read() and tipc_evt_write(). Both those functions calculate the need for conversion internally before performing their respective operations. Hence, all handling of such conversions become transparent to the rest of the code. Acked-by:
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