- 26 Feb, 2016 23 commits
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Alexander Duyck authored
On reviewing the code I realized that GRE and UDP tunnels could cause a kernel panic if we used GSO to segment a large UDP frame that was sent through the tunnel with an outer checksum and hardware offloads were not available. In order to correct this we need to update the feature flags that are passed to the skb_segment function so that in the event of UDP fragmentation being requested for the inner header the segmentation function will correctly generate the checksum for the payload if we cannot segment the outer header. Signed-off-by:
Alexander Duyck <aduyck@mirantis.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
David Ahern says: ==================== net: l3mdev: Fix source address for unnumbered deployments David Lamparter noted a use case where the source address selection fails to pick an address from a VRF interface - unnumbered interfaces. The use case has the VRF device as the VRF local loopback with addresses and interfaces enslaved without an address themselves. e.g, ip addr add 9.9.9.9/32 dev lo ip link set lo up ip link add name vrf0 type vrf table 101 ip rule add oif vrf0 table 101 ip rule add iif vrf0 table 101 ip link set vrf0 up ip addr add 10.0.0.3/32 dev vrf0 ip link add name dummy2 type dummy ip link set dummy2 master vrf0 up --> note dummy2 has no address - unnumbered device ip route add 10.2.2.2/32 dev dummy2 table 101 ip neigh add 10.2.2.2 dev dummy2 lladdr 02:00:00:00:00:02 ping to the 10.2.2.2 through the L3 domain: $ ping -I vrf0 -c1 10.2.2.2 ping: Warning: source address might be selected on device other than vrf0. PING 10.2.2.2 (10.2.2.2) from 9.9.9.9 vrf0: 56(84) bytes of data. picks up the wrong address -- the one from 'lo' not vrf0. And from tcpdump: 12:57:29.449128 IP 9.9.9.9 > 10.2.2.2: ICMP echo request, id 2491, seq 1, length 64 This patch series changes address selection to only consider devices in the same L3 domain and to use the VRF device as the L3 domains loopback. $ ping -I vrf0 -c1 10.2.2.2 PING 10.2.2.2 (10.2.2.2) from 10.0.0.3 vrf0: 56(84) bytes of data. From tcpdump: 12:59:25.096426 IP 10.0.0.3 > 10.2.2.2: ICMP echo request, id 2113, seq 1, length 64 Now the source address comes from vrf0. ==================== Signed-off-by: -
David Lamparter authored
When selecting an address in context of a VRF, the vrf master should be preferred for address selection. If it isn't, the user has a hard time getting the system to select to their preference - the code will pick the address off the first in-VRF interface it can find, which on a router could well be a non-routable address. Signed-off-by:
David Lamparter <equinox@diac24.net> Signed-off-by:
David Ahern <dsa@cumulusnetworks.com> [dsa: Fixed comment style and removed extra blank link ] Signed-off-by:
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David Ahern authored
David Lamparter noted a use case where the source address selection fails to pick an address from a VRF interface - unnumbered interfaces. Relevant commands from his script: ip addr add 9.9.9.9/32 dev lo ip link set lo up ip link add name vrf0 type vrf table 101 ip rule add oif vrf0 table 101 ip rule add iif vrf0 table 101 ip link set vrf0 up ip addr add 10.0.0.3/32 dev vrf0 ip link add name dummy2 type dummy ip link set dummy2 master vrf0 up --> note dummy2 has no address - unnumbered device ip route add 10.2.2.2/32 dev dummy2 table 101 ip neigh add 10.2.2.2 dev dummy2 lladdr 02:00:00:00:00:02 tcpdump -ni dummy2 & And using ping instead of his socat example: $ ping -I vrf0 -c1 10.2.2.2 ping: Warning: source address might be selected on device other than vrf0. PING 10.2.2.2 (10.2.2.2) from 9.9.9.9 vrf0: 56(84) bytes of data. >From tcpdump: 12:57:29.449128 IP 9.9.9.9 > 10.2.2.2: ICMP echo request, id 2491, seq 1, length 64 Note the source address is from lo and is not a VRF local address. With this patch: $ ping -I vrf0 -c1 10.2.2.2 PING 10.2.2.2 (10.2.2.2) from 10.0.0.3 vrf0: 56(84) bytes of data. >From tcpdump: 12:59:25.096426 IP 10.0.0.3 > 10.2.2.2: ICMP echo request, id 2113, seq 1, length 64 Now the source address comes from vrf0. The ipv4 function for selecting source address takes a const argument. Removing the const requires touching a lot of places, so instead l3mdev_master_ifindex_rcu is changed to take a const argument and then do the typecast to non-const as required by netdev_master_upper_dev_get_rcu. This is similar to what l3mdev_fib_table_rcu does. IPv6 for unnumbered interfaces appears to be selecting the addresses properly. Cc: David Lamparter <david@opensourcerouting.org> Signed-off-by: -
David S. Miller authored
David Decotigny says: ==================== new ETHTOOL_GLINKSETTINGS/SLINKSETTINGS API History: v9 - add 'link' in macro, struct and function names - rename ethtool_link_ksettings::parent -> ::base - remove un-needed mlx4 en_dbg_enabled() companion patch - note: bitmap u32[] API patches were merged separately by Kan Liang v8 - bitmap u32 API returns number of bits copied, unit tests updated v7 - module_exit in test_bitmap v6 - fix copy_from_user in user/kernel handshake v5 note: please see v4 bullets for a question regarding bitmap.c - minor fix to make allyesconfig/allmodconfig v4 - removed typedef for link mode bitmaps - moved bitmap<->u32[] conversion routines to bitmap.c . This is the naive implementation. I have an endian-aware version that uses memcpy/memset as much as possible, but I find it harder to follow (see http://paste.ubuntu.com/13863722/). Please let me know if I should use it instead. - fixes suggested by Ben Hutchings v3 - rebased v2 on top of latest net-next, minor checkpatch/printf %*pb updates v2 - keep return 0 in get_settings when successful, instead of propagating positive result from driver's get_settings callback. v1 - original submission The main goal of this series is to support ethtool link mode masks larger than 32 bits. It implements a new ioctl pair (ETHTOOL_GLINKSETTINGS/SLINKSETTINGS), its associated callbacks (get/set_link_ksettings) and a new struct ethtool_link_settings, which should eventually replace legacy ethtool_cmd. Internally, the kernel uses fixed length link mode masks defined at compilation time in ethtool.h (for now: 31 bits), that can be increased by changing __ETHTOOL_LINK_MODE_LAST in ethtool.h (absolute max is 4064 bits, checked at compile time), and the user/kernel interface allows this length to be arbitrary within 1..4064. This should allow some flexibility without using too much heap/stack space, at the cost of a small kernel/user handshake for the user to determine the sizes of those bitmaps. Along the way, I chose to drop in the new structure the 3 ethtool_cmd fields marked "deprecated" (transceiver/maxrxpkt/maxtxpkt). They are still available for old drivers via the (old) ETHTOOL_GSET/SSET API, but are not available to drivers that switch to new API. Of those 3 fields, ethtool_cmd::transceiver seems to be still actively used by several drivers, maybe we should not consider this field deprecated? The 2 other fields are basically not used. This transition requires some care in the way old and new ethtool talk to the kernel. More technical details provided in the description for main patch. In particular details about backward compatibility properties. Some open questions: - the kernel/interface multiplexes the "tell me the bitmap length" handshake and the "give me the settings" inside the new ETHTOOL_GLINKSETTINGS cmd. I was thinking of making this into 2 separate cmds: 1 cmd ETHTOOL_GKERNELPROPERTIES which would be kernel-wide rather than device-specific, would return properties like "length of the link mode bitmaps", and possibly others. And ETHTOOL_GLINKSETTINGS would expect the proper bitmaps - the link mode bitmaps are piggybacked at tail of the new struct ethtool_link_settings. Since its user-visible definition does not assume specific bitmap width, I am using a 0-length array as the publicly visible placeholder. But then, the kernel needs to specialize it (struct ethtool_link_ksettings) to specify its current link mode masks. This means that kernel code is "littered" with "ksettings->base.field" to access "field" inside ethtool_settings: + I could use ethtool_link_settings everywhere (instead of a new ethtool_ksettings) and an container_of accessor (or a plain cast) to retrieve the link mode masks? + or: we could decide to make the link mode masks statically bounded again, ie. make their width public, but larger than current 32, and unchangeable forever. This would make everything straightforward, but we might hit limits later, or have an unneeded memory/stack usage for unused bits. any preference? - I foresee bugs where people use the legacy/deprecated SUPPORTED_x macros instead of the new ETHTOOL_LINK_MODE_x_BIT enums in the new get/set_link_ksettings callbacks. Not sure how to prevent problems with this. The only driver which was converted for now is mlx4. I am not considering fcoe as fully converted, but I updated it a minima to be able to remove __ethtool_get_settings, now known as __ethtool_get_link_ksettings. Tested with legacy and "future" ethtool on 64b x86 kernel and 32+64b ethtool, and on a 32b x86 kernel + 32b ethtool. ==================== Signed-off-by:
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David Decotigny authored
Signed-off-by:
David Decotigny <decot@googlers.com> Signed-off-by:
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David Decotigny authored
replaced by __ethtool_get_link_ksettings. Signed-off-by:
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
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David Decotigny authored
This patch defines a new ETHTOOL_GLINKSETTINGS/SLINKSETTINGS API, handled by the new get_link_ksettings/set_link_ksettings callbacks. This API provides support for most legacy ethtool_cmd fields, adds support for larger link mode masks (up to 4064 bits, variable length), and removes ethtool_cmd deprecated fields (transceiver/maxrxpkt/maxtxpkt). This API is deprecating the legacy ETHTOOL_GSET/SSET API and provides the following backward compatibility properties: - legacy ethtool with legacy drivers: no change, still using the get_settings/set_settings callbacks. - legacy ethtool with new get/set_link_ksettings drivers: the new driver callbacks are used, data internally converted to legacy ethtool_cmd. ETHTOOL_GSET will return only the 1st 32b of each link mode mask. ETHTOOL_SSET will fail if user tries to set the ethtool_cmd deprecated fields to non-0 (transceiver/maxrxpkt/maxtxpkt). A kernel warning is logged if driver sets higher bits. - future ethtool with legacy drivers: no change, still using the get_settings/set_settings callbacks, internally converted to new data structure. Deprecated fields (transceiver/maxrxpkt/maxtxpkt) will be ignored and seen as 0 from user space. Note that that "future" ethtool tool will not allow changes to these deprecated fields. - future ethtool with new drivers: direct call to the new callbacks. By "future" ethtool, what is meant is: - query: first try ETHTOOL_GLINKSETTINGS, and revert to ETHTOOL_GSET if fails - set: query first and remember which of ETHTOOL_GLINKSETTINGS or ETHTOOL_GSET was successful + if ETHTOOL_GLINKSETTINGS was successful, then change config with ETHTOOL_SLINKSETTINGS. A failure there is final (do not try ETHTOOL_SSET). + otherwise ETHTOOL_GSET was successful, change config with ETHTOOL_SSET. A failure there is final (do not try ETHTOOL_SLINKSETTINGS). The interaction user/kernel via the new API requires a small ETHTOOL_GLINKSETTINGS handshake first to agree on the length of the link mode bitmaps. If kernel doesn't agree with user, it returns the bitmap length it is expecting from user as a negative length (and cmd field is 0). When kernel and user agree, kernel returns valid info in all fields (ie. link mode length > 0 and cmd is ETHTOOL_GLINKSETTINGS). Data structure crossing user/kernel boundary is 32/64-bit agnostic. Converted internally to a legal kernel bitmap. The internal __ethtool_get_settings kernel helper will gradually be replaced by __ethtool_get_link_ksettings by the time the first "link_settings" drivers start to appear. So this patch doesn't change it, it will be removed before it needs to be changed. Signed-off-by: -
David Decotigny authored
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David Decotigny authored
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Tom Herbert authored
This patch add the SO_CNX_ADVICE socket option (setsockopt only). The purpose is to allow an application to give feedback to the kernel about the quality of the network path for a connected socket. The value argument indicates the type of quality report. For this initial patch the only supported advice is a value of 1 which indicates "bad path, please reroute"-- the action taken by the kernel is to call dst_negative_advice which will attempt to choose a different ECMP route, reset the TX hash for flow label and UDP source port in encapsulation, etc. This facility should be useful for connected UDP sockets where only the application can provide any feedback about path quality. It could also be useful for TCP applications that have additional knowledge about the path outside of the normal TCP control loop. Signed-off-by:
Tom Herbert <tom@herbertland.com> Signed-off-by:
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David Ahern authored
Currently, all ipv6 addresses are flushed when the interface is configured down, including global, static addresses: $ ip -6 addr show dev eth1 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000 inet6 2100:1::2/120 scope global valid_lft forever preferred_lft forever inet6 fe80::e0:f9ff:fe79:34bd/64 scope link valid_lft forever preferred_lft forever $ ip link set dev eth1 down $ ip -6 addr show dev eth1 << nothing; all addresses have been flushed>> Add a new sysctl to make this behavior optional. The new setting defaults to flush all addresses to maintain backwards compatibility. When the set global addresses with no expire times are not flushed on an admin down. The sysctl is per-interface or system-wide for all interfaces $ sysctl -w net.ipv6.conf.eth1.keep_addr_on_down=1 or $ sysctl -w net.ipv6.conf.all.keep_addr_on_down=1 Will keep addresses on eth1 on an admin down. $ ip -6 addr show dev eth1 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UP qlen 1000 inet6 2100:1::2/120 scope global valid_lft forever preferred_lft forever inet6 fe80::e0:f9ff:fe79:34bd/64 scope link valid_lft forever preferred_lft forever $ ip link set dev eth1 down $ ip -6 addr show dev eth1 3: eth1: <BROADCAST,MULTICAST> mtu 1500 state DOWN qlen 1000 inet6 2100:1::2/120 scope global tentative valid_lft forever preferred_lft forever inet6 fe80::e0:f9ff:fe79:34bd/64 scope link tentative valid_lft forever preferred_lft forever Signed-off-by:
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- 25 Feb, 2016 17 commits
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Florian Westphal authored
msg.dst_sk needs to be set up with a valid socket because some callbacks later derive the netns from it. Fixes: 263ea09084d172d ("Revert "genl: Add genlmsg_new_unicast() for unicast message allocation") Reported-by:Jon Maloy <maloy@donjonn.com> Bisected-by:
Florian Westphal <fw@strlen.de> Acked-by Jon Maloy <jon.maloy@ericsson.com> Signed-off-by:
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Jon Paul Maloy authored
When the TIPC module is unloaded, we have identified a race condition that allows a node reference counter to go to zero and the node instance being freed before the node timer is finished with accessing it. This leads to occasional crashes, especially in multi-namespace environments. The scenario goes as follows: CPU0:(node_stop) CPU1:(node_timeout) // ref == 2 1: if(!mod_timer()) 2: if (del_timer()) 3: tipc_node_put() // ref -> 1 4: tipc_node_put() // ref -> 0 5: kfree_rcu(node); 6: tipc_node_get(node) 7: // BOOM! We now clean up this functionality as follows: 1) We remove the node pointer from the node lookup table before we attempt deactivating the timer. This way, we reduce the risk that tipc_node_find() may obtain a valid pointer to an instance marked for deletion; a harmless but undesirable situation. 2) We use del_timer_sync() instead of del_timer() to safely deactivate the node timer without any risk that it might be reactivated by the timeout handler. There is no risk of deadlock here, since the two functions never touch the same spinlocks. 3: We remove a pointless tipc_node_get() + tipc_node_put() from the timeout handler. Reported-by:
Zhijiang Hu <huzhijiang@gmail.com> 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 Paul Maloy authored
Although we have never seen it happen, we have identified the following problematic scenario when nodes are stopped and deleted: CPU0: CPU1: tipc_node_xxx() //ref == 1 tipc_node_put() //ref -> 0 tipc_node_find() // node still in table tipc_node_delete() list_del_rcu(n. list) tipc_node_get() //ref -> 1, bad kfree_rcu() tipc_node_put() //ref to 0 again. kfree_rcu() // BOOM! We fix this by introducing use of the conditional kref_get_if_not_zero() instead of kref_get() in the function tipc_node_find(). This eliminates any risk of post-mortem access. Reported-by: -
David S. Miller authored
Yuval Mintz says: ==================== qed*: Driver updates Usually I try to provide a sensible description of the patch set even if it lacks a general 'motif', but this simply contains several small, unrelated and self-explenatory tweaks and additions. ==================== Signed-off-by: -
Yuval Mintz authored
Drop the `QL4xxx 40G/100G' and use `FastLinQ 4xxxx' instead. Signed-off-by:
Yuval Mintz <Yuval.Mintz@qlogic.com> Signed-off-by:
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Yuval Mintz authored
Don't allow driver to probe on an adapter at a failed state; Gracefully block the probe instead. Signed-off-by:
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Yuval Mintz authored
Module is using a binary firmware file and so should be marked as such. Signed-off-by:
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Yuval Mintz authored
There are several corner cases where driver might get a 2nd notification about the same link change. Don't log any additional changes if the physical carrier is already reported as it should. Signed-off-by:
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Yuval Mintz authored
There's a corner-case in HW where an SKB queued for transmission that contains too many frags will cause FW to assert. This patch solves this by linearizing the SKB if necessary. Signed-off-by:
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Yuval Mintz authored
The device ID for the 10g module has changed. Populate the pci_ids table accordingly. Signed-off-by:
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Amitoj Kaur Chawla authored
Introduce the use of kobj_to_dev() helper function instead of open coding it with container_of() The Coccinelle semantic patch used to make this change is as follows: //<smpl> @@ expression a; symbol kobj; @@ - container_of(a, struct device, kobj) + kobj_to_dev(a) //</smpl> Signed-off-by:
Amitoj Kaur Chawla <amitoj1606@gmail.com> Signed-off-by:
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Amitoj Kaur Chawla authored
Convert a call to init_timer and accompanying intializations of the timer's data and function fields to a call to setup_timer. The Coccinelle semantic patch that fixes this problem is as follows: // <smpl> @@ expression t,f,d; @@ -init_timer(&t); +setup_timer(&t,f,d); ... -t.data = d; -t.function = f; // </smpl> Signed-off-by:
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Amitoj Kaur Chawla authored
Convert a call to init_timer and accompanying intializations of the timer's data and function fields to a call to setup_timer. The Coccinelle semantic patch that fixes this problem is as follows: // <smpl> @@ expression t,f,d; @@ -init_timer(&t); +setup_timer(&t,f,d); -t.data = d; -t.function = f; // </smpl> Signed-off-by:
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Amitoj Kaur Chawla authored
Convert a call to init_timer and accompanying intializations of the timer's data and function fields to a call to setup_timer. The Coccinelle semantic patch that fixes this problem is as follows: // <smpl> @@ expression t,f,d; @@ -init_timer(&t); +setup_timer(&t,f,d); -t.data = d; -t.function = f; // </smpl> Signed-off-by:
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David S. Miller authored
Yangbo Lu says: ==================== gianfar: Add PTP support for ls1021a platform This patchset is to enable ptp support for ls1021a platform. The endianness issue in gianfar driver and gianfar ptp driver must be fixed, and a 1588 timer node must be added into dts. Changes for v2: - Modified commit message - Added more reviewers ==================== Signed-off-by: -
Yangbo Lu authored
Fix endianness for the 64-bit hardware timestamp value with be64_to_cpu to support both PowerPC platforms and ARM platforms. Signed-off-by:
Yangbo Lu <yangbo.lu@nxp.com> Signed-off-by:
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Yangbo Lu authored
Replace get_of_u32 with standard helper function of_property_read_u32 since the latter can process cpu endianness. Signed-off-by:
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