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* | net: qrtr: Use sk_buff->cb in receive pathBjorn Andersson2017-10-111-30/+40
| | | | | | | | | | | | | | | | | | | | | | | | Rather than parsing the header of incoming messages throughout the implementation do it once when we retrieve the message and store the relevant information in the "cb" member of the sk_buff. This allows us to, in a later commit, decode version 2 messages into this same structure. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: qrtr: Clean up control packet handlingBjorn Andersson2017-10-111-64/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | As the message header generation is deferred the internal functions for generating control packets can be simplified. This patch modifies qrtr_alloc_ctrl_packet() to, in addition to the sk_buff, return a reference to a struct qrtr_ctrl_pkt, which clarifies and simplifies the helpers to the point that these functions can be folded back into the callers. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: qrtr: Pass source and destination to enqueue functionsBjorn Andersson2017-10-111-51/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Defer writing the message header to the skb until its time to enqueue the packet. As the receive path is reworked to decode the message header as it's received from the transport and only pass around the payload in the skb this change means that we do not have to fill out the full message header just to decode it immediately in qrtr_local_enqueue(). In the future this change also makes it possible to prepend message headers based on the version of each link. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: qrtr: Add control packet definition to uapiBjorn Andersson2017-10-111-12/+0
| | | | | | | | | | | | | | | | | | | | | | | | The QMUX protocol specification defines structure of the special control packet messages being sent between handlers of the control port. Add these to the uapi header, as this structure and the associated types are shared between the kernel and all userspace handlers of control messages. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: qrtr: Move constants to header fileBjorn Andersson2017-10-111-2/+0
| | | | | | | | | | | | | | | | The constants are used by both the name server and clients, so clarify their value and move them to the uapi header. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: qrtr: Invoke sk_error_report() after setting sk_errBjorn Andersson2017-10-111-1/+1
|/ | | | | | | | | | Rather than manually waking up any context sleeping on the sock to signal an error we should call sk_error_report(). This has the added benefit that in-kernel consumers can override this notification with its own callback. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* rtnetlink: make rtnl_register accept a flags parameterFlorian Westphal2017-08-091-1/+1
| | | | | | | | | | | | This change allows us to later indicate to rtnetlink core that certain doit functions should be called without acquiring rtnl_mutex. This change should have no effect, we simply replace the last (now unused) calcit argument with the new flag. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* networking: make skb_put & friends return void pointersJohannes Berg2017-06-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It seems like a historic accident that these return unsigned char *, and in many places that means casts are required, more often than not. Make these functions (skb_put, __skb_put and pskb_put) return void * and remove all the casts across the tree, adding a (u8 *) cast only where the unsigned char pointer was used directly, all done with the following spatch: @@ expression SKB, LEN; typedef u8; identifier fn = { skb_put, __skb_put }; @@ - *(fn(SKB, LEN)) + *(u8 *)fn(SKB, LEN) @@ expression E, SKB, LEN; identifier fn = { skb_put, __skb_put }; type T; @@ - E = ((T *)(fn(SKB, LEN))) + E = fn(SKB, LEN) which actually doesn't cover pskb_put since there are only three users overall. A handful of stragglers were converted manually, notably a macro in drivers/isdn/i4l/isdn_bsdcomp.c and, oddly enough, one of the many instances in net/bluetooth/hci_sock.c. In the former file, I also had to fix one whitespace problem spatch introduced. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* networking: introduce and use skb_put_data()Johannes Berg2017-06-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A common pattern with skb_put() is to just want to memcpy() some data into the new space, introduce skb_put_data() for this. An spatch similar to the one for skb_put_zero() converts many of the places using it: @@ identifier p, p2; expression len, skb, data; type t, t2; @@ ( -p = skb_put(skb, len); +p = skb_put_data(skb, data, len); | -p = (t)skb_put(skb, len); +p = skb_put_data(skb, data, len); ) ( p2 = (t2)p; -memcpy(p2, data, len); | -memcpy(p, data, len); ) @@ type t, t2; identifier p, p2; expression skb, data; @@ t *p; ... ( -p = skb_put(skb, sizeof(t)); +p = skb_put_data(skb, data, sizeof(t)); | -p = (t *)skb_put(skb, sizeof(t)); +p = skb_put_data(skb, data, sizeof(t)); ) ( p2 = (t2)p; -memcpy(p2, data, sizeof(*p)); | -memcpy(p, data, sizeof(*p)); ) @@ expression skb, len, data; @@ -memcpy(skb_put(skb, len), data, len); +skb_put_data(skb, data, len); (again, manually post-processed to retain some comments) Reviewed-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* networking: convert many more places to skb_put_zero()Johannes Berg2017-06-161-6/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There were many places that my previous spatch didn't find, as pointed out by yuan linyu in various patches. The following spatch found many more and also removes the now unnecessary casts: @@ identifier p, p2; expression len; expression skb; type t, t2; @@ ( -p = skb_put(skb, len); +p = skb_put_zero(skb, len); | -p = (t)skb_put(skb, len); +p = skb_put_zero(skb, len); ) ... when != p ( p2 = (t2)p; -memset(p2, 0, len); | -memset(p, 0, len); ) @@ type t, t2; identifier p, p2; expression skb; @@ t *p; ... ( -p = skb_put(skb, sizeof(t)); +p = skb_put_zero(skb, sizeof(t)); | -p = (t *)skb_put(skb, sizeof(t)); +p = skb_put_zero(skb, sizeof(t)); ) ... when != p ( p2 = (t2)p; -memset(p2, 0, sizeof(*p)); | -memset(p, 0, sizeof(*p)); ) @@ expression skb, len; @@ -memset(skb_put(skb, len), 0, len); +skb_put_zero(skb, len); Apply it to the tree (with one manual fixup to keep the comment in vxlan.c, which spatch removed.) Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: qrtr: Inform open sockets about new controllerBjorn Andersson2017-06-081-0/+24
| | | | | | | | | | | | | | | | | As the higher level communication only deals with "services" the a service directory is required to keep track of local and remote services. In order for qrtr clients to be informed about when the service directory implementation is available some event needs to be passed to them. Rather than introducing support for broadcasting such a message in-band to all open local sockets we flag each socket with ENETRESET, as there are no other expected operations that would benefit from having support from locally broadcasting messages. Cc: Courtney Cavin <ccavin@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: qrtr: Broadcast DEL_CLIENT message when endpoint is closedBjorn Andersson2017-06-081-0/+28
| | | | | | | | | | | | | | Per the QMUXv2 protocol specificiation a DEL_CLIENT message should be broadcasted when an endpoint is disconnected. The protocol specification does suggest that the router can keep track of which nodes the endpoint has been communicating with to not wake up sleeping remotes unecessarily, but implementation of this suggestion is left for the future. Cc: Courtney Cavin <ccavin@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: qrtr: Inject BYE on remote terminationBjorn Andersson2017-06-081-0/+27
| | | | | | | | | | | | | | | | | | | Per the QMUX protocol specification a terminating node can send a BYE control message to signal that the link is going down, upon receiving this all information about remote services should be discarded and local clients should be notified. In the event that the link was brought down abruptly the router is supposed to act like a BYE message has arrived. As there is no harm in receiving an extra BYE from the remote this patch implements the latter by injecting a BYE when the link to the remote is unregistered. The name service will receive the BYE and can implement the notification to the local clients. Cc: Courtney Cavin <ccavin@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: qrtr: Refactor packet allocationBjorn Andersson2017-06-081-6/+19
| | | | | | | | | Extract the allocation and filling in the control message header fields to a separate function in order to reuse this in subsequent patches. Cc: Courtney Cavin <ccavin@gmail.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller2017-04-211-1/+3
|\ | | | | | | | | | | | | | | | | Both conflict were simple overlapping changes. In the kaweth case, Eric Dumazet's skb_cow() bug fix overlapped the conversion of the driver in net-next to use in-netdev stats. Signed-off-by: David S. Miller <davem@davemloft.net>
| * net: qrtr: potential use after free in qrtr_sendmsg()Dan Carpenter2017-04-211-1/+3
| | | | | | | | | | | | | | | | If skb_pad() fails then it frees the skb so we should check for errors. Fixes: bdabad3e363d ("net: Add Qualcomm IPC router") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: rtnetlink: plumb extended ack to doit functionDavid Ahern2017-04-171-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | Add netlink_ext_ack arg to rtnl_doit_func. Pass extack arg to nlmsg_parse for doit functions that call it directly. This is the first step to using extended error reporting in rtnetlink. >From here individual subsystems can be updated to set netlink_ext_ack as needed. Signed-off-by: David Ahern <dsa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | netlink: pass extended ACK struct to parsing functionsJohannes Berg2017-04-131-1/+1
| | | | | | | | | | | | | | | | | | Pass the new extended ACK reporting struct to all of the generic netlink parsing functions. For now, pass NULL in almost all callers (except for some in the core.) Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | soc: qcom: smd: Transition client drivers from smd to rpmsgBjorn Andersson2017-03-282-23/+21
|/ | | | | | | | | | | | | | | | By moving these client drivers to use RPMSG instead of the direct SMD API we can reuse them ontop of the newly added GLINK wire-protocol support found in the 820 and 835 Qualcomm platforms. As the new (RPMSG-based) and old SMD implementations are mutually exclusive we have to change all client drivers in one commit, to make sure we have a working system before and after this transition. Acked-by: Andy Gross <andy.gross@linaro.org> Acked-by: Kalle Valo <kvalo@codeaurora.org> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* net: qrtr: Mark 'buf' as little endianStephen Boyd2017-01-101-2/+2
| | | | | | | | | | | | | | | | | | | | | | Failure to mark this pointer as __le32 causes checkers like sparse to complain: net/qrtr/qrtr.c:274:16: warning: incorrect type in assignment (different base types) net/qrtr/qrtr.c:274:16: expected unsigned int [unsigned] [usertype] <noident> net/qrtr/qrtr.c:274:16: got restricted __le32 [usertype] <noident> net/qrtr/qrtr.c:275:16: warning: incorrect type in assignment (different base types) net/qrtr/qrtr.c:275:16: expected unsigned int [unsigned] [usertype] <noident> net/qrtr/qrtr.c:275:16: got restricted __le32 [usertype] <noident> net/qrtr/qrtr.c:276:16: warning: incorrect type in assignment (different base types) net/qrtr/qrtr.c:276:16: expected unsigned int [unsigned] [usertype] <noident> net/qrtr/qrtr.c:276:16: got restricted __le32 [usertype] <noident> Silence it. Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge tag 'net-next-qcom-soc-4.7-2-merge' of git://github.com/andersson/kernelDavid S. Miller2016-05-171-3/+6
|\ | | | | | | | | | | | | Merge tag 'qcom-soc-for-4.7-2' into net-next This merges the Qualcomm SOC tree with the net-next, solving the merge conflict in the SMD API between the two.
| * Merge tag 'qcom-soc-for-4.7-2' into net-nextBjorn Andersson2016-05-131-3/+6
| | | | | | | | | | | | | | This merges the Qualcomm SOC tree with the net-next, solving the merge conflict in the SMD API between the two. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
* | net: qrtr: fix build problemsArnd Bergmann2016-05-162-2/+4
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Having multiple loadable modules with the same name cannot work with modprobe, and having both net/qrtr/smd.ko and drivers/soc/qcom/smd.ko results in a (somewhat cryptic) build error: ERROR: "qcom_smd_driver_unregister" [net/qrtr/smd.ko] undefined! ERROR: "qcom_smd_driver_register" [net/qrtr/smd.ko] undefined! ERROR: "qcom_smd_set_drvdata" [net/qrtr/smd.ko] undefined! ERROR: "qcom_smd_send" [net/qrtr/smd.ko] undefined! ERROR: "qcom_smd_get_drvdata" [net/qrtr/smd.ko] undefined! ERROR: "qcom_smd_driver_unregister" [drivers/soc/qcom/wcnss_ctrl.ko] undefined! ERROR: "qcom_smd_driver_register" [drivers/soc/qcom/wcnss_ctrl.ko] undefined! ERROR: "qcom_smd_set_drvdata" [drivers/soc/qcom/wcnss_ctrl.ko] undefined! ERROR: "qcom_smd_send" [drivers/soc/qcom/wcnss_ctrl.ko] undefined! ERROR: "qcom_smd_get_drvdata" [drivers/soc/qcom/wcnss_ctrl.ko] undefined! Also, the qrtr driver uses the SMD interface and has a Kconfig dependency, but also allows for compile-testing when SMD is disabled. However, if with QCOM_SMD=m and COMPILE_TEST=y we can end up with QRTR_SMD=y and that fails with a related link error. The changes the dependency so we can still compile-test the driver but not have it built-in if SMD is a module, to avoid running in the broken configuration, and changes the Makefile to provide the driver under a different module name. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: bdabad3e363d ("net: Add Qualcomm IPC router") Signed-off-by: David S. Miller <davem@davemloft.net>
* net: Add Qualcomm IPC routerCourtney Cavin2016-05-085-0/+1181
Add an implementation of Qualcomm's IPC router protocol, used to communicate with service providing remote processors. Signed-off-by: Courtney Cavin <courtney.cavin@sonymobile.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> [bjorn: Cope with 0 being a valid node id and implement RTM_NEWADDR] Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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