- 09 Jan, 2023 15 commits
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Bjørn Mork authored
Subclassing the generic USB device driver to override the default configuration selection regardless of matching interface drivers. The r815x family devices expose a vendor specific function which the r8152 interface driver wants to handle. This is the preferred device mode. Additionally one or more USB class functions are usually supported for hosts lacking a vendor specific driver. The choice is USB configuration based, with one alternate function per configuration. Example device with both NCM and ECM alternate cfgs: T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 4 Spd=5000 MxCh= 0 D: Ver= 3.20 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 9 #Cfgs= 3 P: Vendor=0bda ProdID=8156 Rev=31.00 S: Manufacturer=Realtek S: Product=USB 10/100/1G/2.5G LAN S: SerialNumber=001000001 C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=256mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=00 Driver=r8152 E: Ad=81(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms E: Ad=83(I) Atr=03(Int.) MxPS= 2 Ivl=128ms C: #Ifs= 2 Cfg#= 2 Atr=a0 MxPwr=256mA I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=0d Prot=00 Driver= E: Ad=83(I) Atr=03(Int.) MxPS= 16 Ivl=128ms I: If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=01 Driver= I: If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=01 Driver= E: Ad=81(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms C: #Ifs= 2 Cfg#= 3 Atr=a0 MxPwr=256mA I: If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver= E: Ad=83(I) Atr=03(Int.) MxPS= 16 Ivl=128ms I: If#= 1 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver= I: If#= 1 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver= E: Ad=81(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms A problem with this is that Linux will prefer class functions over vendor specific functions. Using the above example, Linux defaults to cfg #2, running the device in a sub-optimal NCM mode. Previously we've attempted to work around the problem by blacklisting the devices in the ECM class driver "cdc_ether", and matching on the ECM class function in the vendor specific interface driver. The latter has been used to switch back to the vendor specific configuration when the driver is probed for a class function. This workaround has several issues; - class driver blacklists is additional maintanence cruft in an unrelated driver - class driver blacklists prevents users from optionally running the devices in class mode - each device needs double match entries in the vendor driver - the initial probing as a class function slows down device discovery Now these issues have become even worse with the introduction of firmware supporting both NCM and ECM, where NCM ends up as the default mode in Linux. To use the same workaround, we now have to blacklist the devices in to two different class drivers and add yet another match entry to the vendor specific driver. This patch implements an alternative workaround strategy - independent of the interface drivers. It avoids adding a blacklist to the cdc_ncm driver and will let us remove the existing blacklist from the cdc_ether driver. As an additional bonus, removing the blacklists allow users to select one of the other device modes if wanted. Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Mat Martineau says: ==================== mptcp: Protocol in-use tracking and code cleanup Here's a collection of commits from the MPTCP tree: Patches 1-4 and 6 contain miscellaneous code cleanup for more consistent use of helper functions, existing local variables, and better naming. Patches 5, 7, and 9 add sock_prot_inuse tracking for MPTCP and an associated self test. Patch 8 modifies the mptcp_connect self test tool to exit on SIGUSR1 when in "slow mode". ==================== Signed-off-by: -
Menglong Dong authored
Add the function chk_msk_inuse() to diag.sh, which is used to check the statistics of mptcp socket in use. As mptcp socket in listen state will be closed randomly after 'accept', we need to get the count of listening mptcp socket through 'ss' command. All tests pass. Acked-by:
Paolo Abeni <pabeni@redhat.com> Signed-off-by:
Menglong Dong <imagedong@tencent.com> Signed-off-by:
Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by:
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Menglong Dong authored
For now, mptcp_connect won't exit after receiving the 'SIGUSR1' signal if '-r' is set. Fix this by skipping poll and sleep in copyfd_io_poll() if 'quit' is set. Acked-by:
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Menglong Dong authored
Do the statistics of mptcp socket in use with sock_prot_inuse_add(). Therefore, we can get the count of used mptcp socket from /proc/net/protocols: & cat /proc/net/protocols protocol size sockets memory press maxhdr slab module cl co di ac io in de sh ss gs se re sp bi br ha uh gp em MPTCPv6 2048 0 0 no 0 yes kernel y n y y y y y y y y y y n n n y y y n MPTCP 1896 1 0 no 0 yes kernel y n y y y y y y y y y y n n n y y y n Acked-by:
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Menglong Dong authored
'ssk' should be more appropriate to be the name of the first argument in mptcp_token_new_connect(). Acked-by:
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Menglong Dong authored
The 'sk_prot' field in token KUNIT self-tests will be dereferenced in mptcp_token_new_connect(). Therefore, init it with tcp_prot. Acked-by:
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Menglong Dong authored
'sock->sk' is used frequently in mptcp_listen(). Therefore, we can introduce the 'sk' and replace 'sock->sk' with it. Acked-by:
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Geliang Tang authored
The local variable 'ssk' has been defined at the beginning of the function mptcp_write_options(), use it instead of getting 'ssk' again. Reviewed-by:
Geliang Tang <geliang.tang@suse.com> Signed-off-by:
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Geliang Tang authored
Use the local variable 'net' instead of sock_net() in the functions where the variable 'struct net *net' has been defined. Reviewed-by:
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Geliang Tang authored
The helper msk_owned_by_me() is defined in protocol.h, so use it instead of sock_owned_by_me(). Reviewed-by:
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Leesoo Ahn authored
The current source pushes skb into dev-done queue by calling skb_dequeue_tail() and then pop it by skb_dequeue() to branch to rx_cleanup state for freeing urb/skb in usbnet_bh(). It takes extra CPU load, 2.21% (skb_queue_tail) as follows, - 11.58% 0.26% swapper [k] usbnet_bh - 11.32% usbnet_bh - 6.43% skb_dequeue 6.34% _raw_spin_unlock_irqrestore - 2.21% skb_queue_tail 2.19% _raw_spin_unlock_irqrestore - 1.68% consume_skb - 0.97% kfree_skbmem 0.80% kmem_cache_free 0.53% skb_release_data To reduce the extra CPU load use return values to call helper function usb_free_skb() to free the resources instead of calling skb_queue_tail() and skb_dequeue() for push and pop respectively. - 7.87% 0.25% swapper [k] usbnet_bh - 7.62% usbnet_bh - 4.81% skb_dequeue 4.74% _raw_spin_unlock_irqrestore - 1.75% consume_skb - 0.98% kfree_skbmem 0.78% kmem_cache_free 0.58% skb_release_data 0.53% smsc95xx_rx_fixup Signed-off-by:Leesoo Ahn <lsahn@ooseel.net> Signed-off-by:
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David S. Miller authored
Divya Koppera says: ==================== Fixed warnings Fixed warnings related to PTR_ERR and initialization. ==================== Signed-off-by: -
Divya Koppera authored
Handle the NULL pointer case Fixes New smatch warnings: drivers/net/phy/micrel.c:2613 lan8814_ptp_probe_once() warn: passing zero to 'PTR_ERR' vim +/PTR_ERR +2613 drivers/net/phy/micrel.c Reported-by:
kernel test robot <lkp@intel.com> Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by:
Alexander Duyck <alexanderduyck@fb.com> Signed-off-by:
Divya Koppera <Divya.Koppera@microchip.com> Signed-off-by:
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Divya Koppera authored
Initialized return variable Fixes Old smatch warnings: drivers/net/phy/micrel.c:1750 ksz886x_cable_test_get_status() error: uninitialized symbol 'ret'. Reported-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
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- 07 Jan, 2023 13 commits
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Jakub Kicinski authored
Jiawen Wu says: ==================== net: wangxun: Adjust code structure Remove useless structs 'txgbe_hw' and 'ngbe_hw' make the codes clear. And move the same codes which sets MAC address between txgbe and ngbe to libwx. Further more, rename struct 'wx_hw' to 'wx' and move total adapter members to wx. ==================== Link: https://lore.kernel.org/r/20230106033853.2806007-1-jiawenwu@trustnetic.comSigned-off-by:
Jakub Kicinski <kuba@kernel.org>
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Mengyuan Lou authored
Move the total private structure to libwx. Signed-off-by:
Mengyuan Lou <mengyuanlou@net-swift.com> Signed-off-by:
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Jiawen Wu authored
Move the total private structure to libwx. Signed-off-by:
Jiawen Wu <jiawenwu@trustnetic.com> Signed-off-by:
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Jiawen Wu authored
In order to move the total members in struct adapter to struct wx_hw to keep the code clean, it's a bad name of 'wx_hw' only for hardware. Rename 'wx_hw' to 'wx', and rename the pointers at use. Signed-off-by:
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Jiawen Wu authored
For setting MAC address, both txgbe and ngbe drivers have the same handling flow with different parameters. Move the same codes to libwx. Signed-off-by:
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Jiawen Wu authored
Remove ngbe.h, move defines into ngbe_type.h file. Signed-off-by:
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Jiawen Wu authored
Remove txgbe.h, move defines into txgbe_type.h file. Signed-off-by:
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Jiawen Wu authored
Remove useless structure ngbe_hw to make the codes clear. Signed-off-by:
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Jiawen Wu authored
Remove useless structure txgbe_hw to make the codes clear. Signed-off-by:
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Horatiu Vultur authored
The lan8814 represents a package of 4 PHYs. All of them are sharing the same interrupt line. So when a link was going down/up or a frame was timestamped, then the interrupt handler of all the PHYs was called. Which is all fine and expected but the problem is the way the handler interrupt works. Basically if one of the PHYs timestamp a frame, then all the other 3 PHYs were polling the status of the interrupt until that PHY actually cleared the interrupt by reading the timestamp. The reason of polling was in case another PHY was also timestamping a frame at the same time, it could miss this interrupt. But this is not the right approach, because it is the interrupt controller who needs to call the interrupt handlers again if the interrupt line is still active. Therefore change this such when the interrupt handler is called check only if the interrupt is for itself, otherwise just exit. In this way save CPU usage. Signed-off-by:
Horatiu Vultur <horatiu.vultur@microchip.com> Link: https://lore.kernel.org/r/20230104194218.3785229-1-horatiu.vultur@microchip.comSigned-off-by:
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Kees Cook authored
Zero-length arrays are deprecated[1]. Replace struct ethtool_rxnfc's "rule_locs" 0-length array with a flexible array. Detected with GCC 13, using -fstrict-flex-arrays=3: net/ethtool/common.c: In function 'ethtool_get_max_rxnfc_channel': net/ethtool/common.c:558:55: warning: array subscript i is outside array bounds of '__u32[0]' {aka 'unsigned int[]'} [-Warray-bounds=] 558 | .fs.location = info->rule_locs[i], | ~~~~~~~~~~~~~~~^~~ In file included from include/linux/ethtool.h:19, from include/uapi/linux/ethtool_netlink.h:12, from include/linux/ethtool_netlink.h:6, from net/ethtool/common.c:3: include/uapi/linux/ethtool.h:1186:41: note: while referencing 'rule_locs' 1186 | __u32 rule_locs[0]; | ^~~~~~~~~ [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays Cc: Andrew Lunn <andrew@lunn.ch> Cc: kernel test robot <lkp@intel.com> Cc: Oleksij Rempel <linux@rempel-privat.de> Cc: Sean Anderson <sean.anderson@seco.com> Cc: Alexandru Tachici <alexandru.tachici@analog.com> Cc: Amit Cohen <amcohen@nvidia.com> Signed-off-by:Kees Cook <keescook@chromium.org> Reviewed-by:
Vincent Mailhol <mailhol.vincent@wanadoo.fr> Reviewed-by:
Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20230106042844.give.885-kees@kernel.orgSigned-off-by:
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Kees Cook authored
Zero-length arrays are deprecated[1]. Replace struct ipv6_rpl_sr_hdr's "segments" union of 0-length arrays with flexible arrays. Detected with GCC 13, using -fstrict-flex-arrays=3: In function 'rpl_validate_srh', inlined from 'rpl_build_state' at ../net/ipv6/rpl_iptunnel.c:96:7: ../net/ipv6/rpl_iptunnel.c:60:28: warning: array subscript <unknown> is outside array bounds of 'struct in6_addr[0]' [-Warray-bounds=] 60 | if (ipv6_addr_type(&srh->rpl_segaddr[srh->segments_left - 1]) & | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from ../include/net/rpl.h:12, from ../net/ipv6/rpl_iptunnel.c:13: ../include/uapi/linux/rpl.h: In function 'rpl_build_state': ../include/uapi/linux/rpl.h:40:33: note: while referencing 'addr' 40 | struct in6_addr addr[0]; | ^~~~ [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org> Signed-off-by:David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20230105221533.never.711-kees@kernel.orgSigned-off-by:
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Kees Cook authored
Zero-length arrays are deprecated[1]. Replace struct ioam6_trace_hdr's "data" 0-length array with a flexible array. Detected with GCC 13, using -fstrict-flex-arrays=3: net/ipv6/ioam6_iptunnel.c: In function 'ioam6_build_state': net/ipv6/ioam6_iptunnel.c:194:37: warning: array subscript <unknown> is outside array bounds of '__u8[0]' {aka 'unsigned char[]'} [-Warray-bounds=] 194 | tuninfo->traceh.data[trace->remlen * 4] = IPV6_TLV_PADN; | ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ In file included from include/linux/ioam6.h:11, from net/ipv6/ioam6_iptunnel.c:13: include/uapi/linux/ioam6.h:130:17: note: while referencing 'data' 130 | __u8 data[0]; | ^~~~ [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arraysSigned-off-by:Justin Iurman <justin.iurman@uliege.be> Tested-by:
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- 06 Jan, 2023 12 commits
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David S. Miller authored
Jakub Kicinski says: ==================== devlink: remove the wait-for-references on unregister Move the registration and unregistration of the devlink instances under their instance locks. Don't perform the netdev-style wait for all references when unregistering the instance. Instead the devlink instance refcount will only ensure that the memory of the instance is not freed. All places which acquire access to devlink instances via a reference must check that the instance is still registered under the instance lock. This fixes the problem of the netdev code accessing devlink instances before they are registered. RFC: https://lore.kernel.org/all/20221217011953.152487-1-kuba@kernel.org/ - rewrite the cover letter - rewrite the commit message for patch 1 - un-export and rename devl_is_alive - squash the netdevsim patches ==================== Signed-off-by:
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Jakub Kicinski authored
To prevent races with netdev code accessing free devlink instances move the registration under the devlink instance lock. Core now waits for the instance to be registered before accessing it. Signed-off-by:
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Jakub Kicinski authored
err_dl_unregister should unregister the devlink instance. Looks like renaming it was missed in one of the reshufflings. Reviewed-by:
Jacob Keller <jacob.e.keller@intel.com> Signed-off-by:
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Jakub Kicinski authored
It's most natural to register the instance first and then its subobjects. Now that we can use the instance lock to protect the atomicity of all init - it should also be safe. Signed-off-by:
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Jakub Kicinski authored
Requiring devlink_set_features() to be run before devlink is registered is overzealous. devlink_set_features() itself is a leftover from old workarounds which were trying to prevent initiating reload before probe was complete. Signed-off-by:
Jiri Pirko <jiri@nvidia.com> Signed-off-by:
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Jakub Kicinski authored
The objective of exposing the devlink instance locks to drivers was to let them use these locks to prevent user space from accessing the device before it's fully initialized. This is difficult because devlink_unregister() waits for all references to be released, meaning that devlink_unregister() can't itself be called under the instance lock. To avoid this issue devlink_register() was moved after subobject registration a while ago. Unfortunately the netdev paths get a hold of the devlink instances _before_ they are registered. Ideally netdev should wait for devlink init to finish (synchronizing on the instance lock). This can't work because we don't know if the instance will _ever_ be registered (in case of failures it may not). The other option of returning an error until devlink_register() is called is unappealing (user space would get a notification netdev exist but would have to wait arbitrary amount of time before accessing some of its attributes). Weaken the guarantees of the devlink references. Holding a reference will now only guarantee that the memory of the object is around. Another way of looking at it is that the reference now protects the object not its "registered" status. Use devlink instance lock to synchronize unregistration. This implies that releasing of the "main" reference of the devlink instance moves from devlink_unregister() to devlink_free(). Reviewed-by:
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Jakub Kicinski authored
Always check under the instance lock whether the devlink instance is still / already registered. This is a no-op for the most part, as the unregistration path currently waits for all references. On the init path, however, we may temporarily open up a race with netdev code, if netdevs are registered before the devlink instance. This is temporary, the next change fixes it, and this commit has been split out for the ease of review. Note that in case of iterating over sub-objects which have their own lock (regions and line cards) we assume an implicit dependency between those objects existing and devlink unregistration. Signed-off-by:
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Jakub Kicinski authored
devlink->dev is assumed to be always valid as long as any outstanding reference to the devlink instance exists. In prep for weakening of the references take the instance lock. Signed-off-by:
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Jakub Kicinski authored
devlink_pernet_pre_exit() is the only obvious place which takes the instance lock without using the devl_ helpers. Update the code and move the error print after releasing the reference (having unlock and put together feels slightly idiomatic). Reviewed-by:
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Jakub Kicinski authored
xa_find_after() is designed to handle multi-index entries correctly. If a xarray has two entries one which spans indexes 0-3 and one at index 4 xa_find_after(0) will return the entry at index 4. Having to juggle the two callbacks, however, is unnecessary in case of the devlink xarray, as there is 1:1 relationship with indexes. Always use xa_find() and increment the index manually. Signed-off-by:
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Mahesh Bandewar authored
All were not visible to the non-priv users inside netns. However, with 4ecb9009 ("sysctl: allow override of /proc/sys/net with CAP_NET_ADMIN"), these vars are protected from getting modified. A proc with capable(CAP_NET_ADMIN) can change the values so not having them visible inside netns is just causing nuisance to process that check certain values (e.g. net.core.somaxconn) and see different behavior in root-netns vs. other-netns Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by:
Mahesh Bandewar <maheshb@google.com> Acked-by:
Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by:
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Jakub Kicinski authored
Jakub Kicinski says: ==================== devlink: code split and structured instance walk Split devlink.c into a handful of files, trying to keep the "core" code away from all the command-specific implementations. The core code has been quite scattered until now. Going forward we can consider using a source file per-subobject, I think that it's quite beneficial to newcomers (based on relative ease with which folks contribute to ethtool vs devlink). But this series doesn't split everything out, yet - partially due to backporting concerns, but mostly due to lack of time. Bulk of the netlink command handling is left in a leftover.c file. Introduce a context structure for dumps, and use it to store the devlink instance ID of the last dumped devlink instance. This means we don't have to restart the walk from 0 each time. Finally - introduce a "structured walk". A centralized dump handler in devlink/netlink.c which walks the devlink instances, deals with refcounting/locking, simplifying the per-object implementations quite a bit. Inspired by the ethtool code. v1: https://lore.kernel.org/all/20230104041636.226398-1-kuba@kernel.org/ RFC: https://lore.kernel.org/all/20221215020155.1619839-1-kuba@kernel.org/ ==================== Link: https://lore.kernel.org/r/20230105040531.353563-1-kuba@kernel.orgSigned-off-by:
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