- Aug 09, 2017
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Arvind Yadav authored
usb_device_id are not supposed to change at runtime. All functions working with usb_device_id provided by <linux/usb.h> work with const usb_device_id. So mark the non-const structs as const. Signed-off-by:
Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Arvind Yadav authored
usb_device_id are not supposed to change at runtime. All functions working with usb_device_id provided by <linux/usb.h> work with const usb_device_id. So mark the non-const structs as const. Signed-off-by:
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Arvind Yadav authored
usb_device_id are not supposed to change at runtime. All functions working with usb_device_id provided by <linux/usb.h> work with const usb_device_id. So mark the non-const structs as const. Signed-off-by:
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Arvind Yadav authored
usb_device_id are not supposed to change at runtime. All functions working with usb_device_id provided by <linux/usb.h> work with const usb_device_id. So mark the non-const structs as const. Signed-off-by:
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- Aug 08, 2017
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David Ahern authored
Add extack error messages for failure paths creating vrf devices. Once extack support is added to iproute2, we go from the unhelpful: $ ip li add foobar type vrf RTNETLINK answers: Invalid argument to: $ ip li add foobar type vrf Error: VRF table id is missing Signed-off-by:David Ahern <dsahern@gmail.com> Signed-off-by:
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Bhumika Goyal authored
Declare this structure as const as it is only used during a copy operation. Signed-off-by:
Bhumika Goyal <bhumirks@gmail.com> Signed-off-by:
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David S. Miller authored
Arkadi Sharshevsky says: ==================== Update DSA's FDB API and perform switchdev cleanup The patchset adds support for configuring static FDB entries via the switchdev notification chain. The current method for FDB configuration uses the switchdev's bridge bypass implementation. In order to support this legacy way and to perform the switchdev cleanup, the implementation is moved inside DSA. The DSA drivers cannot sync the software bridge with hardware learned entries and use the switchdev's implementation of bypass FDB dumping. Because they are the only ones using this functionality, the fdb_dump implementation is moved from switchdev code into DSA. Finally after this changes a major cleanup in switchdev can be done. Please see individual patches for patch specific change logs. v1->v2 - Split MDB/vlan dump removal into core/driver removal. v2->v3 - The self implementation for FDB add/del is moved inside DSA. ==================== Tested-by:
Vivien Didelot <vivien.didelot@savoirfairelinux.com> Tested-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
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Arkadi Sharshevsky authored
Currently the bridge port flags, vlans, FDBs and MDBs can be offloaded through the bridge code, making the switchdev's SELF bridge bypass implementation to be redundant. This implies several changes: - No need for dump infra in switchdev, DSA's special case is handled privately. - Remove obj_dump from switchdev_ops. - FDBs are removed from obj_add/del routines, due to the fact that they are offloaded through the bridge notification chain. - The switchdev_port_bridge_xx() and switchdev_port_fdb_xx() functions can be removed. Signed-off-by:
Arkadi Sharshevsky <arkadis@mellanox.com> Reviewed-by:
Jiri Pirko <jiri@mellanox.com> Reviewed-by:
Ivan Vecera <ivecera@redhat.com> Reviewed-by:
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Arkadi Sharshevsky authored
At this point no driver supports FDB add/del through switchdev object but rather via notification chain, thus, it is removed. Signed-off-by:
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Arkadi Sharshevsky authored
>From all switchdev devices only DSA requires special FDB dump. This is due to lack of ability for syncing the hardware learned FDBs with the bridge. Due to this it is removed from switchdev and moved inside DSA. Signed-off-by:
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Arkadi Sharshevsky authored
Currently the MDB HW database is synced with the bridge's one, thus, There is no need to support special dump functionality. Signed-off-by:
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Arkadi Sharshevsky authored
This is done as a preparation before removing support for MDB dump from DSA core. The MDBs are synced with the bridge and thus there is no need for special dump operation support. Signed-off-by:
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Arkadi Sharshevsky authored
The bridge port attributes/vlan for DSA devices should be set only from bridge code. Furthermore, The vlans are synced totally with the bridge so there is no need for special dump support. Signed-off-by:
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Arkadi Sharshevsky authored
This is done as a preparation before removing support for vlan dump from DSA core. The vlans are synced with the bridge and thus there is no need for special dump operation support. Signed-off-by:
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Arkadi Sharshevsky authored
The DSA drivers do not support bridge flags offload. Yet, this attribute should be added in order for the bridge to fail when one tries set a flag on the port, as explained in commit dc0ecabd ("net: switchdev: Add support for querying supported bridge flags by hardware"). Signed-off-by:
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Arkadi Sharshevsky authored
Currently DSA uses switchdev's implementation of FDB add/del ndos. This patch moves the implementation inside DSA in order to support the legacy way for static FDB configuration. Signed-off-by:
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Arkadi Sharshevsky authored
Add support for learning FDB through notification. The driver defers the hardware update via ordered work queue. In case of a successful FDB add a notification is sent back to bridge. In case of hw FDB del failure the static FDB will be deleted from the bridge, thus, the interface is moved to down state in order to indicate inconsistent situation. Signed-off-by:
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Arkadi Sharshevsky authored
Currently, the switchdev objects are embedded inside the DSA notifier info. This patch removes this dependency. This is done as a preparation stage before adding support for learning FDB through the switchdev notification chain. Signed-off-by:
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Arkadi Sharshevsky authored
The prepare phase for FDB add is unneeded because most of DSA devices can have failures during bus transactions (SPI, I2C, etc.), thus, the prepare phase cannot guarantee success of the commit stage. The support for learning FDB through notification chain, which will be introduced in the following patches, will provide the ability to notify back the bridge about successful offload. Signed-off-by:
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Arkadi Sharshevsky authored
In order to support FDB add/del to be on a notifier chain the slave API need to be changed to be switchdev independent. Signed-off-by:
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Bhumika Goyal authored
Make hdlcdrv_ops structures const as they are only passed to hdlcdrv_register function. The corresponding argument is of type const, so make the structures const. Signed-off-by:
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Florian Westphal authored
Quoting Ilan Tayari: 1. Set up a host-to-host IPSec tunnel (or transport, doesn't matter) 2. Ping over IPSec, or do something to populate the pcpu cache 3. Join a MC group, then leave MC group 4. Try to ping again using same CPU as before -> traffic doesn't egress the machine at all Ilan debugged the problem down to the fact that one of the path dsts devices point to lo due to earlier dst_dev_put(). In this case, dst is marked as DEAD and we cannot reuse the bundle. The cache only asserted that the requested policy and that of the cached bundle match, but its not enough - also verify the path is still valid. Fixes: ec30d78c ("xfrm: add xdst pcpu cache") Reported-by:Ayham Masood <ayhamm@mellanox.com> Tested-by:
Ilan Tayari <ilant@mellanox.com> Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
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David S. Miller authored
Vivien Didelot says: ==================== net: dsa: remove useless arguments Several DSA core setup functions take many arguments, mostly because of the legacy code. This patch series removes the useless args of these functions, where either the dsa_switch or dsa_port argument is enough. Changes in v2: - ds->dev is already assigned by dsa_switch_alloc ==================== Signed-off-by: -
Vivien Didelot authored
dsa_slave_create currently takes 4 arguments while it only needs the related dsa_port and its name. Remove all other arguments. Signed-off-by:
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Vivien Didelot authored
dsa_cpu_dsa_setup currently takes 4 arguments but they are all available from the dsa_port argument. Remove all others. Signed-off-by:
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Vivien Didelot authored
dsa_switch_alloc() already assigns ds-dev, which can be used in dsa_switch_setup_one and dsa_cpu_dsa_setups instead of requiring an additional struct device argument. Signed-off-by:
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Colin Ian King authored
Trivial fix to spelling mistake in dev_err error message and also split overly long line to avoid a checkpatch warning. Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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David S. Miller authored
Egil Hjelmeland says: ==================== Refactor lan9303_xxx_packet_processing This series is purely non functional. It changes the lan9303_enable_packet_processing, lan9303_disable_packet_processing() to pass port number (0,1,2) as parameter instead of port offset. This aligns them with other functions in the module, and makes it possible to simplify the code. The lan9303_enable_packet_processing, lan9303_disable_packet_processing functions operate on port. Therefore rename the functions to reflect that as well. Reviewer pointed out lan9303_get_ethtool_stats would be better off with the use of a lan9303_read_switch_port(). So that was added to the series. Changes v3 -> v4: - Whitespace adjustments. Changes v2 -> v3: - Patch 1: Removed the change in lan9303_get_ethtool_stats - Added patch 4: rename lan9303_xxx_packet_processing - Added patch 5: refactor lan9303_get_ethtool_stats Changes v1 -> v2: - introduced lan9303_write_switch_port() in first patch - inserted LAN9303_NUM_PORTS patch - Use LAN9303_NUM_PORTS in last patch. Plus whitespace change. ==================== Signed-off-by: -
Egil Hjelmeland authored
In lan9303_get_ethtool_stats: Get rid of 0x400 constant magic by using new lan9303_read_switch_reg() inside loop. Reduced scope of two variables. Signed-off-by:
Egil Hjelmeland <privat@egil-hjelmeland.no> Reviewed-by:
Andrew Lunn <andrew@lunn.ch> Reviewed-by:
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Egil Hjelmeland authored
The lan9303_enable_packet_processing, lan9303_disable_packet_processing functions operate on port, so the names should reflect that. And to align with lan9303_disable_processing(), rename: lan9303_enable_packet_processing -> lan9303_enable_processing_port lan9303_disable_packet_processing -> lan9303_disable_processing_port Signed-off-by:
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Egil Hjelmeland authored
Simplify usage of lan9303_enable_packet_processing, lan9303_disable_packet_processing() Signed-off-by:
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Egil Hjelmeland authored
Will be used instead of '3' in upcomming patches. Signed-off-by:
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Egil Hjelmeland authored
lan9303_enable_packet_processing, lan9303_disable_packet_processing() Pass port number (0,1,2) as parameter instead of port offset. Because other functions in the module pass port numbers. And to enable simplifications in following patch. Introduce lan9303_write_switch_port(). Signed-off-by:
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David S. Miller authored
David Lebrun says: ==================== ipv6: sr: add support for advanced local segment processing v2: use EXPORT_SYMBOL_GPL The current implementation of IPv6 SR supports SRH insertion/encapsulation and basic segment endpoint behavior (i.e., processing of an SRH contained in a packet whose active segment (IPv6 DA) is routed to the local node). This behavior simply consists of updating the DA to the next segment and forwarding the packet accordingly. This processing is realised for all such packets, regardless of the active segment. The most recent specifications of IPv6 SR [1] [2] extend the SRH processing features as follows. Each segment endpoint defines a MyLocalSID table. This table maps segments to operations to perform. For each ingress IPv6 packet whose DA is part of a given prefix, the segment endpoint looks up the active segment (i.e., the IPv6 DA) in the MyLocalSID table and applies the corresponding operation. Such specifications enable to specify arbitrary operations besides the basic SRH processing and allow for a more fine-grained classification. This patch series implements those extended specifications by leveraging a new type of lightweight tunnel, seg6local. The MyLocalSID table is simply an arbitrary routing table (using CONFIG_IPV6_MULTIPLE_TABLES). The following commands would assign the prefix fc00::/64 to the MyLocalSID table, map the segment fc00::42 to the regular SRH processing function (named "End"), and drop all packets received with an undefined active segment: ip -6 rule add fc00::/64 lookup 100 ip -6 route add fc00::42 encap seg6local action End dev eth0 table 100 ip -6 route add blackhole default table 100 As another example, the following command would assign the segment fc00::1234 to the regular SRH processing function, except that the processed packet must be forwarded to the next-hop fc42::1 (this operation is named "End.X"): ip -6 route add fc00::1234 encap seg6local action End.X nh6 fc42::1 dev eth0 table 100 Those two basic operations (End and End.X) are defined in [1]. A more extensive list of advanced operations is defined in [2]. The first two patches of the series are preliminary work that remove an assumption about initial SRH format, and export the two functions used to insert and encapsulate an SRH onto packets. The third patch defines the new seg6local lightweight tunnel and implement the core functions. The fourth patch implements the operations needed to handle the newly defined rtnetlink attributes. The fifth patch implements a few SRH processing operations, including End and End.X. [1] https://tools.ietf.org/html/draft-ietf-6man-segment-routing-header-07 [2] https://tools.ietf.org/html/draft-filsfils-spring-srv6-network-programming-01 ==================== Signed-off-by:
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David Lebrun authored
This patch implements the following seg6local actions. - SEG6_LOCAL_ACTION_END: regular SRH processing. The DA of the packet is updated to the next segment and forwarded accordingly. - SEG6_LOCAL_ACTION_END_X: same as above, except that the packet is forwarded to the specified IPv6 next-hop. - SEG6_LOCAL_ACTION_END_DX6: decapsulate the packet and forward to inner IPv6 packet to the specified IPv6 next-hop. - SEG6_LOCAL_ACTION_END_B6: insert the specified SRH directly after the IPv6 header of the packet. - SEG6_LOCAL_ACTION_END_B6_ENCAP: encapsulate the packet within an outer IPv6 header, containing the specified SRH. Signed-off-by:
David Lebrun <david.lebrun@uclouvain.be> Signed-off-by:
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David Lebrun authored
This patch adds the necessary functions to parse, fill, and compare seg6local rtnetlink attributes, for all defined action parameters. - The SRH parameter defines an SRH to be inserted or encapsulated. - The TABLE parameter defines the table to use for the route lookup of the next segment or the inner decapsulated packet. - The NH4 parameter defines the IPv4 next-hop for an inner decapsulated IPv4 packet. - The NH6 parameter defines the IPv6 next-hop for the next segment or for an inner decapsulated IPv6 packet - The IIF parameter defines an ingress interface index. - The OIF parameter defines an egress interface index. Signed-off-by:
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David Lebrun authored
This patch implements a new type of lightweight tunnel named seg6local. A seg6local lwt is defined by a type of action and a set of parameters. The action represents the operation to perform on the packets matching the lwt's route, and is not necessarily an encapsulation. The set of parameters are arguments for the processing function. Each action is defined in a struct seg6_action_desc within seg6_action_table[]. This structure contains the action, mandatory attributes, the processing function, and a static headroom size required by the action. The mandatory attributes are encoded as a bitmask field. The static headroom is set to a non-zero value when the processing function always add a constant number of bytes to the skb (e.g. the header size for encapsulations). To facilitate rtnetlink-related operations such as parsing, fill_encap, and cmp_encap, each type of action parameter is associated to three function pointers, in seg6_action_params[]. All actions defined in seg6_local.h are detailed in [1]. [1] https://tools.ietf.org/html/draft-filsfils-spring-srv6-network-programming-01 Signed-off-by:
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David Lebrun authored
This patch exports the seg6_do_srh_encap() and seg6_do_srh_inline() functions. It also removes the CONFIG_IPV6_SEG6_INLINE knob that enabled the compilation of seg6_do_srh_inline(). This function is now built-in. Signed-off-by:
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David Lebrun authored
The seg6_validate_srh() function only allows SRHs whose active segment is the first segment of the path. However, an application may insert an SRH whose active segment is not the first one. Such an application might be for example an SR-aware Virtual Network Function. This patch enables to insert SRHs with an arbitrary active segment. Signed-off-by:
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John Fastabend authored
Originally we used a mutex to protect concurrent devmap update and delete operations from racing with netdev unregister notifier callbacks. The notifier hook is needed because we increment the netdev ref count when a dev is added to the devmap. This ensures the netdev reference is valid in the datapath. However, we don't want to block unregister events, hence the initial mutex and notifier handler. The concern was in the notifier hook we search the map for dev entries that hold a refcnt on the net device being torn down. But, in order to do this we require two steps, (i) dereference the netdev: dev = rcu_dereference(map[i]) (ii) test ifindex: dev->ifindex == removing_ifindex and then finally we can swap in the NULL dev in the map via an xchg operation, xchg(map[i], NULL) The danger here is a concurrent update could run a different xchg op concurrently leading us to replace the new dev with a NULL dev incorrectly. CPU 1 CPU 2 notifier hook bpf devmap update dev = rcu_dereference(map[i]) dev = rcu_dereference(map[i]) xchg(map[i]), new_dev); rcu_call(dev,...) xchg(map[i], NULL) The above flow would create the incorrect state with the dev reference in the update path being lost. To resolve this the original code used a mutex around the above block. However, updates, deletes, and lookups occur inside rcu critical sections so we can't use a mutex in this context safely. Fortunately, by writing slightly better code we can avoid the mutex altogether. If CPU 1 in the above example uses a cmpxchg and _only_ replaces the dev reference in the map when it is in fact the expected dev the race is removed completely. The two cases being illustrated here, first the race condition, CPU 1 CPU 2 notifier hook bpf devmap update dev = rcu_dereference(map[i]) dev = rcu_dereference(map[i]) xchg(map[i]), new_dev); rcu_call(dev,...) odev = cmpxchg(map[i], dev, NULL) Now we can test the cmpxchg return value, detect odev != dev and abort. Or in the good case, CPU 1 CPU 2 notifier hook bpf devmap update dev = rcu_dereference(map[i]) odev = cmpxchg(map[i], dev, NULL) [...] Now 'odev == dev' and we can do proper cleanup. And viola the original race we tried to solve with a mutex is corrected and the trace noted by Sasha below is resolved due to removal of the mutex. Note: When walking the devmap and removing dev references as needed we depend on the core to fail any calls to dev_get_by_index() using the ifindex of the device being removed. This way we do not race with the user while searching the devmap. Additionally, the mutex was also protecting list add/del/read on the list of maps in-use. This patch converts this to an RCU list and spinlock implementation. This protects the list from concurrent alloc/free operations. The notifier hook walks this list so it uses RCU read semantics. BUG: sleeping function called from invalid context at kernel/locking/mutex.c:747 in_atomic(): 1, irqs_disabled(): 0, pid: 16315, name: syz-executor1 1 lock held by syz-executor1/16315: #0: (rcu_read_lock){......}, at: [<ffffffff8c363bc2>] map_delete_elem kernel/bpf/syscall.c:577 [inline] #0: (rcu_read_lock){......}, at: [<ffffffff8c363bc2>] SYSC_bpf kernel/bpf/syscall.c:1427 [inline] #0: (rcu_read_lock){......}, at: [<ffffffff8c363bc2>] SyS_bpf+0x1d32/0x4ba0 kernel/bpf/syscall.c:1388 Fixes: 2ddf71e2 ("net: add notifier hooks for devmap bpf map") Reported-by:Sasha Levin <alexander.levin@verizon.com> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Signed-off-by:
John Fastabend <john.fastabend@gmail.com> Signed-off-by:
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