kernel/linux.git/drivers/net/hyperv, branch v5.4.50

hv_netvsc: Fix unwanted wakeup in netvsc_attach()

2020-03-05T15:43:46+00:00

commit f6f13c125e05603f68f5bf31f045b95e6d493598 upstream. When netvsc_attach() is called by operations like changing MTU, etc., an extra wakeup may happen while netvsc_attach() calling rndis_filter_device_add() which sends rndis messages when queue is stopped in netvsc_detach(). The completion message will wake up queue 0. We can reproduce the issue by changing MTU etc., then the wake_queue counter from "ethtool -S" will increase beyond stop_queue counter: stop_queue: 0 wake_queue: 1 The issue causes queue wake up, and counter increment, no other ill effects in current code. So we didn't see any network problem for now. To fix this, initialize tx_disable to true, and set it to false when the NIC is ready to be attached or registered. Fixes: 7b2ee50c0cd5 ("hv_netvsc: common detach logic") Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

hv_netvsc: flag software created hash value

2020-01-26T09:01:06+00:00

[ Upstream commit df9f540ca74297a84bafacfa197e9347b20beea5 ] When the driver needs to create a hash value because it was not done at higher level, then the hash should be marked as a software not hardware hash. Fixes: f72860afa2e3 ("hv_netvsc: Exclude non-TCP port numbers from vRSS hashing") Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

hv_netvsc: Fix memory leak when removing rndis device

2020-01-23T07:22:49+00:00

[ Upstream commit 536dc5df2808efbefc5acee334d3c4f701790ec0 ] kmemleak detects the following memory leak when hot removing a network device: unreferenced object 0xffff888083f63600 (size 256): comm "kworker/0:1", pid 12, jiffies 4294831717 (age 1113.676s) hex dump (first 32 bytes): 00 40 c7 33 80 88 ff ff 00 00 00 00 10 00 00 00 .@.3............ 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N.......... backtrace: [<00000000d4a8f5be>] rndis_filter_device_add+0x117/0x11c0 [hv_netvsc] [<000000009c02d75b>] netvsc_probe+0x5e7/0xbf0 [hv_netvsc] [<00000000ddafce23>] vmbus_probe+0x74/0x170 [hv_vmbus] [<00000000046e64f1>] really_probe+0x22f/0xb50 [<000000005cc35eb7>] driver_probe_device+0x25e/0x370 [<0000000043c642b2>] bus_for_each_drv+0x11f/0x1b0 [<000000005e3d09f0>] __device_attach+0x1c6/0x2f0 [<00000000a72c362f>] bus_probe_device+0x1a6/0x260 [<0000000008478399>] device_add+0x10a3/0x18e0 [<00000000cf07b48c>] vmbus_device_register+0xe7/0x1e0 [hv_vmbus] [<00000000d46cf032>] vmbus_add_channel_work+0x8ab/0x1770 [hv_vmbus] [<000000002c94bb64>] process_one_work+0x919/0x17d0 [<0000000096de6781>] worker_thread+0x87/0xb40 [<00000000fbe7397e>] kthread+0x333/0x3f0 [<000000004f844269>] ret_from_fork+0x3a/0x50 rndis_filter_device_add() allocates an instance of struct rndis_device which never gets deallocated as rndis_filter_device_remove() sets net_device->extension which points to the rndis_device struct to NULL, leaving the rndis_device dangling. Since net_device->extension is eventually freed in free_netvsc_device(), we refrain from setting it to NULL inside rndis_filter_device_remove() Signed-off-by: Mohammed Gamal Reviewed-by: Haiyang Zhang Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman

hv_netvsc: Fix unwanted rx_table reset

2020-01-12T11:21:45+00:00

[ Upstream commit b0689faa8efc5a3391402d7ae93bd373b7248e51 ] In existing code, the receive indirection table, rx_table, is in struct rndis_device, which will be reset when changing MTU, ringparam, etc. User configured receive indirection table values will be lost. To fix this, move rx_table to struct net_device_context, and check netif_is_rxfh_configured(), so rx_table will be set to default only if no user configured value. Fixes: ff4a44199012 ("netvsc: allow get/set of RSS indirection table") Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

hv_netvsc: Fix tx_table init in rndis_set_subchannel()

2020-01-04T18:19:15+00:00

[ Upstream commit c39ea5cba5a2e97fc01b78c85208bf31383b399c ] Host can provide send indirection table messages anytime after RSS is enabled by calling rndis_filter_set_rss_param(). So the host provided table values may be overwritten by the initialization in rndis_set_subchannel(). To prevent this problem, move the tx_table initialization before calling rndis_filter_set_rss_param(). Fixes: a6fb6aa3cfa9 ("hv_netvsc: Set tx_table to equal weight after subchannels open") Signed-off-by: Haiyang Zhang Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman

hv_netvsc: Fix send_table offset in case of a host bug

2019-11-22T03:32:23+00:00

If negotiated NVSP version <= NVSP_PROTOCOL_VERSION_6, the offset may be wrong (too small) due to a host bug. This can cause missing the end of the send indirection table, and add multiple zero entries from leading zeros before the data region. This bug adds extra burden on channel 0. So fix the offset by computing it from the data structure sizes. This will ensure netvsc driver runs normally on unfixed hosts, and future fixed hosts. Fixes: 5b54dac856cb ("hyperv: Add support for virtual Receive Side Scaling (vRSS)") Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller

hv_netvsc: Fix offset usage in netvsc_send_table()

2019-11-22T03:32:23+00:00

To reach the data region, the existing code adds offset in struct nvsp_5_send_indirect_table on the beginning of this struct. But the offset should be based on the beginning of its container, struct nvsp_message. This bug causes the first table entry missing, and adds an extra zero from the zero pad after the data region. This can put extra burden on the channel 0. So, correct the offset usage. Also add a boundary check to ensure not reading beyond data region. Fixes: 5b54dac856cb ("hyperv: Add support for virtual Receive Side Scaling (vRSS)") Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller

hv_netvsc: Fix error handling in netvsc_attach()

2019-10-31T01:17:36+00:00

If rndis_filter_open() fails, we need to remove the rndis device created in earlier steps, before returning an error code. Otherwise, the retry of netvsc_attach() from its callers will fail and hang. Fixes: 7b2ee50c0cd5 ("hv_netvsc: common detach logic") Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller

hv_netvsc: Fix error handling in netvsc_set_features()

2019-10-31T01:17:36+00:00

When an error is returned by rndis_filter_set_offload_params(), we should still assign the unaffected features to ndev->features. Otherwise, these features will be missing. Fixes: d6792a5a0747 ("hv_netvsc: Add handler for LRO setting change") Signed-off-by: Haiyang Zhang Signed-off-by: David S. Miller

net: core: add generic lockdep keys

2019-10-24T21:53:48+00:00

Some interface types could be nested. (VLAN, BONDING, TEAM, MACSEC, MACVLAN, IPVLAN, VIRT_WIFI, VXLAN, etc..) These interface types should set lockdep class because, without lockdep class key, lockdep always warn about unexisting circular locking. In the current code, these interfaces have their own lockdep class keys and these manage itself. So that there are so many duplicate code around the /driver/net and /net/. This patch adds new generic lockdep keys and some helper functions for it. This patch does below changes. a) Add lockdep class keys in struct net_device - qdisc_running, xmit, addr_list, qdisc_busylock - these keys are used as dynamic lockdep key. b) When net_device is being allocated, lockdep keys are registered. - alloc_netdev_mqs() c) When net_device is being free'd llockdep keys are unregistered. - free_netdev() d) Add generic lockdep key helper function - netdev_register_lockdep_key() - netdev_unregister_lockdep_key() - netdev_update_lockdep_key() e) Remove unnecessary generic lockdep macro and functions f) Remove unnecessary lockdep code of each interfaces. After this patch, each interface modules don't need to maintain their lockdep keys. Signed-off-by: Taehee Yoo Signed-off-by: David S. Miller