| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/07/25 13:55 | flow | patch-triage |
7mArgs:null Results: {
"EnableConfigs": [
"NETDEVSIM",
"VXLAN",
"GENEVE",
"NET_UDP_TUNNEL"
],
"FocusSymbols": [
"udp_tunnel_nic_device_sync_work",
"udp_tunnel_nic_netdevice_event",
"__udp_tunnel_nic_add_port",
"__udp_tunnel_nic_del_port"
],
"Reasoning": "The patch changes the synchronization mechanism for UDP tunnel NIC offloading from a regular workqueue to a delayed workqueue, and modifies the locking in the work handler to use rtnl_trylock() with a requeue delay to prevent deadlocks during device unregistration. This is a functional change in core networking logic that is reachable via emulated devices (like netdevsim) and should be fuzzed to ensure no new races or deadlocks are introduced.",
"WorthFuzzing": true
} |
| 1/1 | 2026/07/25 13:55 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit eb2945ce743e929b874c29f20e0cf71c6cb3897e\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Sat Jul 25 13:55:26 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/net/ipv4/udp_tunnel_nic.c b/net/ipv4/udp_tunnel_nic.c\nindex 3b32a0afa9798d..53a1a9c1f8bff0 100644\n--- a/net/ipv4/udp_tunnel_nic.c\n+++ b/net/ipv4/udp_tunnel_nic.c\n@@ -32,13 +32,12 @@ struct udp_tunnel_nic_table_entry {\n * @lock:\tprotects all fields\n * @need_sync:\tat least one port start changed\n * @need_replay: space was freed, we need a replay of all ports\n- * @work_pending: @work is currently scheduled\n * @n_tables:\tnumber of tables under @entries\n * @missed:\tbitmap of tables which overflown\n * @entries:\ttable of tables of ports currently offloaded\n */\n struct udp_tunnel_nic {\n-\tstruct work_struct work;\n+\tstruct delayed_work work;\n \n \tstruct net_device *dev;\n \n@@ -46,7 +45,6 @@ struct udp_tunnel_nic {\n \n \tu8 need_sync:1;\n \tu8 need_replay:1;\n-\tu8 work_pending:1;\n \n \tunsigned int n_tables;\n \tunsigned long missed;\n@@ -301,11 +299,10 @@ __udp_tunnel_nic_device_sync(struct net_device *dev, struct udp_tunnel_nic *utn)\n static void\n udp_tunnel_nic_device_sync(struct net_device *dev, struct udp_tunnel_nic *utn)\n {\n-\tif (!utn-\u003eneed_sync || utn-\u003ework_pending)\n+\tif (!utn-\u003eneed_sync)\n \t\treturn;\n \n-\tqueue_work(udp_tunnel_nic_workqueue, \u0026utn-\u003ework);\n-\tutn-\u003ework_pending = 1;\n+\tqueue_delayed_work(udp_tunnel_nic_workqueue, \u0026utn-\u003ework, 0);\n }\n \n static bool\n@@ -731,12 +728,17 @@ udp_tunnel_nic_replay(struct net_device *dev, struct udp_tunnel_nic *utn)\n static void udp_tunnel_nic_device_sync_work(struct work_struct *work)\n {\n \tstruct udp_tunnel_nic *utn =\n-\t\tcontainer_of(work, struct udp_tunnel_nic, work);\n+\t\tcontainer_of(work, struct udp_tunnel_nic, work.work);\n \n-\trtnl_lock();\n+\t/* We cannot block on RTNL here, otherwise we would deadlock with\n+\t * udp_tunnel_nic_unregister() calling cancel_delayed_work_sync()\n+\t * while holding RTNL. Requeue with 1 jiffy delay if RTNL is contended.\n+\t */\n+\tif (!rtnl_trylock()) {\n+\t\tqueue_delayed_work(udp_tunnel_nic_workqueue, \u0026utn-\u003ework, 1);\n+\t\treturn;\n+\t}\n \tmutex_lock(\u0026utn-\u003elock);\n-\n-\tutn-\u003ework_pending = 0;\n \t__udp_tunnel_nic_device_sync(utn-\u003edev, utn);\n \n \tif (utn-\u003eneed_replay)\n@@ -757,7 +759,7 @@ udp_tunnel_nic_alloc(const struct udp_tunnel_nic_info *info,\n \tif (!utn)\n \t\treturn NULL;\n \tutn-\u003en_tables = n_tables;\n-\tINIT_WORK(\u0026utn-\u003ework, udp_tunnel_nic_device_sync_work);\n+\tINIT_DELAYED_WORK(\u0026utn-\u003ework, udp_tunnel_nic_device_sync_work);\n \tmutex_init(\u0026utn-\u003elock);\n \n \tfor (i = 0; i \u003c n_tables; i++) {\n@@ -901,11 +903,11 @@ udp_tunnel_nic_unregister(struct net_device *dev, struct udp_tunnel_nic *utn)\n \tudp_tunnel_nic_flush(dev, utn);\n \tudp_tunnel_nic_unlock(dev);\n \n-\t/* Wait for the work to be done using the state, netdev core will\n-\t * retry unregister until we give up our reference on this device.\n+\t/* Make sure no work is running or queued before freeing @utn.\n+\t * The work handler uses rtnl_trylock(), so it will not deadlock\n+\t * against the RTNL we are holding here.\n \t */\n-\tif (utn-\u003ework_pending)\n-\t\treturn;\n+\tcancel_delayed_work_sync(\u0026utn-\u003ework);\n \n \tudp_tunnel_nic_free(utn);\n release_dev:\n"
} |
| 2/1 | 2026/07/25 13:55 | agent | patch-evaluator |
7mModel:best-expensive Args: null Results: {
"EnableConfigs": [
"NETDEVSIM",
"VXLAN",
"GENEVE",
"NET_UDP_TUNNEL"
],
"FocusSymbols": [
"udp_tunnel_nic_device_sync_work",
"udp_tunnel_nic_netdevice_event",
"__udp_tunnel_nic_add_port",
"__udp_tunnel_nic_del_port"
],
"Reasoning": "The patch changes the synchronization mechanism for UDP tunnel NIC offloading from a regular workqueue to a delayed workqueue, and modifies the locking in the work handler to use rtnl_trylock() with a requeue delay to prevent deadlocks during device unregistration. This is a functional change in core networking logic that is reachable via emulated devices (like netdevsim) and should be fuzzed to ensure no new races or deadlocks are introduced.",
"WorthFuzzing": true
}Instruction: You are an expert Linux kernel maintainer. Your job is to review a provided patch series and determine if it makes functional changes to the kernel that should be fuzzed. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively use your code access tools to examine the actual source code and confirm any assumptions. Return WorthFuzzing=false if the patch only contains: - Modifications to Documentation/, Kconfig files, or code comments. - Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints. - Changes to numeric constants or macros that do not functionally alter execution flow. - Code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim). - Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed, ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU. - Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove) that are executed only during PCI hot-unplug or sysfs driver unbind operations. If it modifies reachable core kernel logic, drivers, or architectures, use your code search tools to verify the code can be executed, then return WorthFuzzing=true. When returning WorthFuzzing=true, you MUST ALSO: 1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols. Avoid listing generic hot-path functions to prevent skewed test distributions. Prefer non-static, non-inlined API entrypoint functions over internal static helper functions (which are inlined by the compiler and do not have distinct symbol addresses). 2. Identify any specific CONFIG_ options required to properly test this new/modified feature. Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions. Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed for Kbuild to compile the code statically into vmlinux. List them in the EnableConfigs output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: For your convenience, here is the diff of the changes:
commit eb2945ce743e929b874c29f20e0cf71c6cb3897e
Author: syz-cluster <triage@syzkaller.com>
Date: Sat Jul 25 13:55:26 2026 +0000
syz-cluster: applied patch under review
diff --git a/net/ipv4/udp_tunnel_nic.c b/net/ipv4/udp_tunnel_nic.c
index 3b32a0afa9798d..53a1a9c1f8bff0 100644
--- a/net/ipv4/udp_tunnel_nic.c
+++ b/net/ipv4/udp_tunnel_nic.c
@@ -32,13 +32,12 @@ struct udp_tunnel_nic_table_entry {
* @lock: protects all fields
* @need_sync: at least one port start changed
* @need_replay: space was freed, we need a replay of all ports
- * @work_pending: @work is currently scheduled
* @n_tables: number of tables under @entries
* @missed: bitmap of tables which overflown
* @entries: table of tables of ports currently offloaded
*/
struct udp_tunnel_nic {
- struct work_struct work;
+ struct delayed_work work;
struct net_device *dev;
@@ -46,7 +45,6 @@ struct udp_tunnel_nic {
u8 need_sync:1;
u8 need_replay:1;
- u8 work_pending:1;
unsigned int n_tables;
unsigned long missed;
@@ -301,11 +299,10 @@ __udp_tunnel_nic_device_sync(struct net_device *dev, struct udp_tunnel_nic *utn)
static void
udp_tunnel_nic_device_sync(struct net_device *dev, struct udp_tunnel_nic *utn)
{
- if (!utn->need_sync || utn->work_pending)
+ if (!utn->need_sync)
return;
- queue_work(udp_tunnel_nic_workqueue, &utn->work);
- utn->work_pending = 1;
+ queue_delayed_work(udp_tunnel_nic_workqueue, &utn->work, 0);
}
static bool
@@ -731,12 +728,17 @@ udp_tunnel_nic_replay(struct net_device *dev, struct udp_tunnel_nic *utn)
static void udp_tunnel_nic_device_sync_work(struct work_struct *work)
{
struct udp_tunnel_nic *utn =
- container_of(work, struct udp_tunnel_nic, work);
+ container_of(work, struct udp_tunnel_nic, work.work);
- rtnl_lock();
+ /* We cannot block on RTNL here, otherwise we would deadlock with
+ * udp_tunnel_nic_unregister() calling cancel_delayed_work_sync()
+ * while holding RTNL. Requeue with 1 jiffy delay if RTNL is contended.
+ */
+ if (!rtnl_trylock()) {
+ queue_delayed_work(udp_tunnel_nic_workqueue, &utn->work, 1);
+ return;
+ }
mutex_lock(&utn->lock);
-
- utn->work_pending = 0;
__udp_tunnel_nic_device_sync(utn->dev, utn);
if (utn->need_replay)
@@ -757,7 +759,7 @@ udp_tunnel_nic_alloc(const struct udp_tunnel_nic_info *info,
if (!utn)
return NULL;
utn->n_tables = n_tables;
- INIT_WORK(&utn->work, udp_tunnel_nic_device_sync_work);
+ INIT_DELAYED_WORK(&utn->work, udp_tunnel_nic_device_sync_work);
mutex_init(&utn->lock);
for (i = 0; i < n_tables; i++) {
@@ -901,11 +903,11 @@ udp_tunnel_nic_unregister(struct net_device *dev, struct udp_tunnel_nic *utn)
udp_tunnel_nic_flush(dev, utn);
udp_tunnel_nic_unlock(dev);
- /* Wait for the work to be done using the state, netdev core will
- * retry unregister until we give up our reference on this device.
+ /* Make sure no work is running or queued before freeing @utn.
+ * The work handler uses rtnl_trylock(), so it will not deadlock
+ * against the RTNL we are holding here.
*/
- if (utn->work_pending)
- return;
+ cancel_delayed_work_sync(&utn->work);
udp_tunnel_nic_free(utn);
release_dev:
|
| 3/2 | 2026/07/25 13:55 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3035 output: 33 thoughts: 330 Thoughts: **Analyzing a UDP Tunnel NIC Patch** Okay, so I'm looking at this patch for `net/ipv4/udp_tunnel_nic.c`. Seems like a straightforward, but crucial, change. They're switching from `struct work_struct` to `struct delayed_work` in the `struct udp_tunnel_nic`. That's the first clue. Then, all the associated functions are being updated to use the delayed work equivalents: `queue_delayed_work`, `INIT_DELAYED_WORK`, and `cancel_delayed_work_sync`. The important function `udp_tunnel_nic_device_sync_work` is now using `rtnl_trylock()` with a retry using `queue_delayed_work` if the lock is not available. This is a tell-tale sign of trying to fix a concurrency problem, likely a deadlock or race condition, within the UDP tunnel NIC offloading path. This is immediately flagged as something that absolutely *needs* fuzzing. We have a solid lead on a functional change addressing a specific type of issue. Let me take a closer look at the `net/ipv4/udp_tunnel_nic.c` source file itself to get a better handle on the config options and key symbols involved. I need to focus on these symbols to understand how this code is used and how the changes affect it: `udp_tunnel_nic_device_sync`, `udp_tunnel_nic_device_sync_work`, `udp_tunnel_nic_unregister`, and `udp_tunnel_nic_alloc`. Now, I need to figure out the configuration dependencies. I'll check `net/ipv4/Makefile` or `net/ipv4/Kconfig` to determine which config options enable `udp_tunnel_nic.c`. This will give me a baseline to work from when testing this change. |
| 4/2 | 2026/07/25 13:55 | tool | grepper |
0mArgs:{
"Expression": "udp_tunnel_nic.o",
"PathPrefix": "net/ipv4/Makefile"
}Results: {
"Output": "net/ipv4/Makefile=30=obj-$(CONFIG_NET_IPGRE) += ip_gre.o\nnet/ipv4/Makefile:31:udp_tunnel-y := udp_tunnel_core.o udp_tunnel_nic.o\nnet/ipv4/Makefile-32-obj-$(CONFIG_NET_UDP_TUNNEL) += udp_tunnel.o\n"
} |
| 5/2 | 2026/07/25 13:55 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 3891 output: 34 thoughts: 44 Thoughts: Okay, here's my take on those thoughts, tailored for an expert audience: **Kernel Configuration Dependencies - UDP Tunnel Module** Right, so `CONFIG_NET_UDP_TUNNEL` is enabled. That should bring in the `udp_tunnel_nic.o` module. No surprises there. But I need to refresh my memory on where exactly this is defined. Let's quickly verify that `NET_UDP_TUNNEL` is actually defined within `net/ipv4/Kconfig`. I need to ensure there are no upstream changes that I am not aware of, or if there is any unusual config dependency that I need to be careful of. That's always the first place I start with these network-related options to get the dependencies and implications straight in my head. A quick check of that Kconfig file should confirm the link and give me the context I need. |
| 6/2 | 2026/07/25 13:55 | tool | grepper |
0mArgs:{
"Expression": "config NET_UDP_TUNNEL",
"PathPrefix": "net/ipv4/Kconfig"
}Results: {
"Output": "net/ipv4/Kconfig=304=config NET_IPVTI\n--\nnet/ipv4/Kconfig-315-\nnet/ipv4/Kconfig:316:config NET_UDP_TUNNEL\nnet/ipv4/Kconfig-317-\ttristate\n"
} |
| 7/2 | 2026/07/25 13:55 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 4236 output: 27 thoughts: 43 Thoughts: Okay, let's see what I can pull out of this. **Investigating the NET_UDP_TUNNEL Tristate** Right, so `NET_UDP_TUNNEL` is a tristate configuration option, which immediately makes me think it's likely a supporting configuration rather than a directly user-selectable one. The text notes that other configurations, such as VXLAN or GENEVE, are probably the ones driving its selection. That makes sense; it's probably an underlying building block for those tunneling protocols. Now I need to figure out which of those configurations is pulling in `NET_UDP_TUNNEL`, or if it's other options entirely. I'll need to trace the dependencies to understand the complete picture. |
| 8/2 | 2026/07/25 13:55 | tool | grepper |
0mArgs:{
"Expression": "select NET_UDP_TUNNEL",
"PathPrefix": ""
}Results: {
"Output": "drivers/infiniband/sw/rxe/Kconfig=2=config RDMA_RXE\n--\ndrivers/infiniband/sw/rxe/Kconfig-5-\tdepends on INFINIBAND_VIRT_DMA\ndrivers/infiniband/sw/rxe/Kconfig:6:\tselect NET_UDP_TUNNEL\ndrivers/infiniband/sw/rxe/Kconfig-7-\tselect CRC32\n--\ndrivers/net/Kconfig=74=config WIREGUARD\n--\ndrivers/net/Kconfig-76-\tdepends on NET \u0026\u0026 INET\ndrivers/net/Kconfig:77:\tselect NET_UDP_TUNNEL\ndrivers/net/Kconfig-78-\tselect DST_CACHE\n--\ndrivers/net/Kconfig=103=config OVPN\n--\ndrivers/net/Kconfig-106-\tselect DST_CACHE\ndrivers/net/Kconfig:107:\tselect NET_UDP_TUNNEL\ndrivers/net/Kconfig-108-\tselect CRYPTO\n--\ndrivers/net/Kconfig=230=config VXLAN\n--\ndrivers/net/Kconfig-232-\tdepends on INET\ndrivers/net/Kconfig:233:\tselect NET_UDP_TUNNEL\ndrivers/net/Kconfig-234-\tselect GRO_CELLS\n--\ndrivers/net/Kconfig=245=config GENEVE\n--\ndrivers/net/Kconfig-247-\tdepends on INET\ndrivers/net/Kconfig:248:\tselect NET_UDP_TUNNEL\ndrivers/net/Kconfig-249-\tselect GRO_CELLS\n--\ndrivers/net/Kconfig=260=config BAREUDP\n--\ndrivers/net/Kconfig-262-\tdepends on INET\ndrivers/net/Kconfig:263:\tselect NET_UDP_TUNNEL\ndrivers/net/Kconfig-264-\tselect GRO_CELLS\n--\ndrivers/net/Kconfig=272=config GTP\n--\ndrivers/net/Kconfig-274-\tdepends on INET\ndrivers/net/Kconfig:275:\tselect NET_UDP_TUNNEL\ndrivers/net/Kconfig-276-\thelp\n--\ndrivers/net/Kconfig=289=config PFCP\n--\ndrivers/net/Kconfig-291-\tdepends on INET\ndrivers/net/Kconfig:292:\tselect NET_UDP_TUNNEL\ndrivers/net/Kconfig-293-\thelp\n--\ndrivers/net/Kconfig=302=config AMT\n--\ndrivers/net/Kconfig-304-\tdepends on INET \u0026\u0026 IP_MULTICAST\ndrivers/net/Kconfig:305:\tselect NET_UDP_TUNNEL\ndrivers/net/Kconfig-306-\thelp\n--\nnet/ipv4/Kconfig=321=config NET_FOU\nnet/ipv4/Kconfig-322-\ttristate \"IP: Foo (IP protocols) over UDP\"\nnet/ipv4/Kconfig:323:\tselect NET_UDP_TUNNEL\nnet/ipv4/Kconfig-324-\thelp\n--\nnet/l2tp/Kconfig=6=menuconfig L2TP\n--\nnet/l2tp/Kconfig-8-\tdepends on INET\nnet/l2tp/Kconfig:9:\tselect NET_UDP_TUNNEL\nnet/l2tp/Kconfig-10-\thelp\n--\nnet/rxrpc/Kconfig=6=config AF_RXRPC\n--\nnet/rxrpc/Kconfig-11-\tselect KEYS\nnet/rxrpc/Kconfig:12:\tselect NET_UDP_TUNNEL\nnet/rxrpc/Kconfig-13-\thelp\n--\nnet/sctp/Kconfig=6=menuconfig IP_SCTP\n--\nnet/sctp/Kconfig-12-\tselect NET_CRC32C\nnet/sctp/Kconfig:13:\tselect NET_UDP_TUNNEL\nnet/sctp/Kconfig-14-\thelp\n--\nnet/tipc/Kconfig=30=config TIPC_MEDIA_UDP\n--\nnet/tipc/Kconfig-32-\tdepends on TIPC\nnet/tipc/Kconfig:33:\tselect NET_UDP_TUNNEL\nnet/tipc/Kconfig-34-\tdefault y\n"
} |
| 9/2 | 2026/07/25 13:55 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5542 output: 35 thoughts: 148 Thoughts: **Examining the Kernel Configuration for UDP Tunneling** Okay, so I'm looking at how we enable UDP tunneling within the kernel config. The key here is `NET_UDP_TUNNEL`. It's selected by a lot of different features, which is pretty common. My first instinct was whether we could just directly list `NET_UDP_TUNNEL` in `EnableConfigs`, alongside options like `VXLAN` or `GENEVE`. But then I remembered `NET_UDP_TUNNEL` is a tristate config, and because it lacks a direct prompt, it can *only* be selected by other configs. So, we need to be more explicit; the right approach is to enable something that selects it, and that would be `VXLAN`, `GENEVE`, or even `NET_FOU`. Makes sense. To get a better understanding of how all of this works, let's dive into the code. Specifically, I should check `net/ipv4/udp_tunnel_nic.c`. I need to review what functions are exported from that file, and also where in the kernel code these functions are called. That should give me a good picture of how the UDP tunnel functionality is implemented and configured. |
| 10/2 | 2026/07/25 13:55 | tool | grepper |
0mError:no matches Args: {
"Expression": "EXPORT_SYMBOL",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"error": "no matches"
} |
| 11/2 | 2026/07/25 13:55 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5997 output: 35 thoughts: 55 Thoughts: Okay, here's my take on those thoughts, framed as an expert's internal monologue: **Investigating a Missing Symbol** Hmm, strange. I was expecting `udp_tunnel_nic.c` to export something, but I'm not seeing any `EXPORT_SYMBOL` macro in that file. That's unusual, especially for a core networking component. Okay, let's step back and consider where the relevant symbols *should* be. Given the naming convention and the overall architecture, it's very likely that related functionality or a broader definition lives in either `net/ipv4/udp_tunnel_core.c` or, potentially, in another file also in the `net/ipv4` directory such as the `udp_tunnel_nic.c` file again. I need to quickly scan through one of those source files to see if a similar symbol export exists or if it's placed differently. Let me check the exports in those files and see what I can find. I suspect the core definitions will be in one of those spots. |
| 12/2 | 2026/07/25 13:55 | tool | grepper |
0mArgs:{
"Expression": "EXPORT_SYMBOL",
"PathPrefix": "net/ipv4/udp_tunnel_core.c"
}Results: {
"Output": "net/ipv4/udp_tunnel_core.c=12=int udp_sock_create4(struct net *net, struct udp_port_cfg *cfg,\n--\nnet/ipv4/udp_tunnel_core.c-59-}\nnet/ipv4/udp_tunnel_core.c:60:EXPORT_SYMBOL(udp_sock_create4);\nnet/ipv4/udp_tunnel_core.c-61-\n--\nnet/ipv4/udp_tunnel_core.c=71=void setup_udp_tunnel_sock(struct net *net, struct sock *sk,\n--\nnet/ipv4/udp_tunnel_core.c-97-}\nnet/ipv4/udp_tunnel_core.c:98:EXPORT_SYMBOL_GPL(setup_udp_tunnel_sock);\nnet/ipv4/udp_tunnel_core.c-99-\nnet/ipv4/udp_tunnel_core.c=100=void udp_tunnel_push_rx_port(struct net_device *dev, struct sock *sk,\n--\nnet/ipv4/udp_tunnel_core.c-110-}\nnet/ipv4/udp_tunnel_core.c:111:EXPORT_SYMBOL_GPL(udp_tunnel_push_rx_port);\nnet/ipv4/udp_tunnel_core.c-112-\nnet/ipv4/udp_tunnel_core.c=113=void udp_tunnel_drop_rx_port(struct net_device *dev, struct sock *sk,\n--\nnet/ipv4/udp_tunnel_core.c-123-}\nnet/ipv4/udp_tunnel_core.c:124:EXPORT_SYMBOL_GPL(udp_tunnel_drop_rx_port);\nnet/ipv4/udp_tunnel_core.c-125-\n--\nnet/ipv4/udp_tunnel_core.c=127=void udp_tunnel_notify_add_rx_port(struct sock *sk, unsigned short type)\n--\nnet/ipv4/udp_tunnel_core.c-144-}\nnet/ipv4/udp_tunnel_core.c:145:EXPORT_SYMBOL_GPL(udp_tunnel_notify_add_rx_port);\nnet/ipv4/udp_tunnel_core.c-146-\n--\nnet/ipv4/udp_tunnel_core.c=148=void udp_tunnel_notify_del_rx_port(struct sock *sk, unsigned short type)\n--\nnet/ipv4/udp_tunnel_core.c-165-}\nnet/ipv4/udp_tunnel_core.c:166:EXPORT_SYMBOL_GPL(udp_tunnel_notify_del_rx_port);\nnet/ipv4/udp_tunnel_core.c-167-\nnet/ipv4/udp_tunnel_core.c=168=void udp_tunnel_xmit_skb(struct rtable *rt, struct sock *sk, struct sk_buff *skb,\n--\nnet/ipv4/udp_tunnel_core.c-189-}\nnet/ipv4/udp_tunnel_core.c:190:EXPORT_SYMBOL_GPL(udp_tunnel_xmit_skb);\nnet/ipv4/udp_tunnel_core.c-191-\nnet/ipv4/udp_tunnel_core.c=192=void udp_tunnel_sock_release(struct sock *sk)\n--\nnet/ipv4/udp_tunnel_core.c-199-}\nnet/ipv4/udp_tunnel_core.c:200:EXPORT_SYMBOL_GPL(udp_tunnel_sock_release);\nnet/ipv4/udp_tunnel_core.c-201-\nnet/ipv4/udp_tunnel_core.c=202=struct metadata_dst *udp_tun_rx_dst(struct sk_buff *skb, unsigned short family,\n--\nnet/ipv4/udp_tunnel_core.c-222-}\nnet/ipv4/udp_tunnel_core.c:223:EXPORT_SYMBOL_GPL(udp_tun_rx_dst);\nnet/ipv4/udp_tunnel_core.c-224-\nnet/ipv4/udp_tunnel_core.c=225=struct rtable *udp_tunnel_dst_lookup(struct sk_buff *skb,\n--\nnet/ipv4/udp_tunnel_core.c-271-}\nnet/ipv4/udp_tunnel_core.c:272:EXPORT_SYMBOL_GPL(udp_tunnel_dst_lookup);\nnet/ipv4/udp_tunnel_core.c-273-\n"
} |
| 13/2 | 2026/07/25 13:55 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 7440 output: 35 thoughts: 37 Thoughts: Okay, here's my take on those thoughts, framed as an expert's internal monologue: **UDP Tunnel NIC Module - Re-Examination** Hmm, that's odd. I was just working with `udp_tunnel_nic.c`, and something felt off. I'm almost certain I was looking for an exported function or symbol, but now I'm drawing a blank. It seems like the module *itself* isn't exposing anything directly. Okay, let's double-check the code's source. Better go back and confirm my assumption, especially the file `net/ipv4/udp_tunnel_nic.c`. There has to be a reason why I was looking at that file. Perhaps I was focused on the internal mechanisms and got lost in the flow. I need to make sure I'm not missing something obvious – maybe my goal has changed, or the functionality I assumed was there, simply isn't. Time for another look. |
| 14/2 | 2026/07/25 13:55 | tool | grepper |
0mError:no matches Args: {
"Expression": "EXPORT_SYMBOL",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"error": "no matches"
} |
| 15/2 | 2026/07/25 13:55 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 7730 output: 40 thoughts: 123 Thoughts: **Kernel Module Investigation** Okay, so I'm digging into this kernel module, and my initial thought was that the symbol I need might be exported from `net/ipv4/udp_tunnel_nic.c`. But I didn't immediately see it, which is frustrating. Hold on, let's step back for a second – `udp_tunnel_nic.c` isn't a standalone object; it's compiled into `udp_tunnel.o` along with `udp_tunnel_core.c`. Hmm, right, so looking at *just* `udp_tunnel_nic.c` might be too narrow. Alright, let's go back and explicitly search `net/ipv4/udp_tunnel_nic.c` again, specifically for `EXPORT_SYMBOL`. I really need to confirm I'm not missing something obvious. *Wait*... I *just* did that, didn't I? Okay, no, no, let's not get ahead of ourselves. Let's make sure I'm following a systematic approach. Let's shift our focus to looking directly for functions beginning with `udp_tunnel_nic_` within `net/ipv4/udp_tunnel_nic.c`, and seeing what that turns up. Hopefully, something will jump out. |
| 16/2 | 2026/07/25 13:56 | tool | grepper |
0mError:no matches Args: {
"Expression": "^void udp_tunnel_nic_",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"error": "no matches"
} |
| 17/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 8183 output: 38 thoughts: 33 Thoughts: Okay, here's my interpretation of those thoughts, presented as a first-person summary, keeping in mind my expertise: **Checking `udp_tunnel_nic.c` for Red Flags** Alright, let's get down to it. Given my understanding of the kernel's networking stack, specifically how UDP tunneling works, my immediate concern is around potential vulnerabilities, or maybe just overlooked code. I need to be *thorough* when inspecting networking code. I want to dive into `net/ipv4/udp_tunnel_nic.c`. The first thing I'm doing is a targeted code review. I'm focusing on the `udp_tunnel_nic_` functions. My gut tells me there might be something interesting. I want to identify any `udp_tunnel_nic_` functions that *don't* explicitly declare a return type of `void`. That's a classic code smell. Non-void functions without a return value present can be a source of problems, undefined behavior, or potentially exploitable bugs due to unexpected return values that are not handled. It's a quick way to flag potential issues related to data handling, error conditions, or security. I'm looking for anything that could deviate from expected behavior or provide an unintended opportunity for manipulation. It's a quick scan to make sure the basics are covered, and nothing critical is slipping through the cracks. Time to start digging. |
| 18/2 | 2026/07/25 13:56 | tool | grepper |
0mArgs:{
"Expression": "udp_tunnel_nic_",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"Output": "\nFull output is too long, showing 500 out of 570 lines.\nUse more precise expression if possible.\n\nnet/ipv4/udp_tunnel_nic.c-11-\nnet/ipv4/udp_tunnel_nic.c:12:enum udp_tunnel_nic_table_entry_flags {\nnet/ipv4/udp_tunnel_nic.c-13-\tUDP_TUNNEL_NIC_ENTRY_ADD\t= BIT(0),\n--\nnet/ipv4/udp_tunnel_nic.c-18-\nnet/ipv4/udp_tunnel_nic.c:19:struct udp_tunnel_nic_table_entry {\nnet/ipv4/udp_tunnel_nic.c-20-\t__be16 port;\n--\nnet/ipv4/udp_tunnel_nic.c=39=struct udp_tunnel_nic {\n--\nnet/ipv4/udp_tunnel_nic.c-50-\tunsigned long missed;\nnet/ipv4/udp_tunnel_nic.c:51:\tstruct udp_tunnel_nic_table_entry *entries[] __counted_by(n_tables);\nnet/ipv4/udp_tunnel_nic.c-52-};\n--\nnet/ipv4/udp_tunnel_nic.c-56- */\nnet/ipv4/udp_tunnel_nic.c:57:static struct workqueue_struct *udp_tunnel_nic_workqueue;\nnet/ipv4/udp_tunnel_nic.c-58-\nnet/ipv4/udp_tunnel_nic.c:59:static const char *udp_tunnel_nic_tunnel_type_name(unsigned int type)\nnet/ipv4/udp_tunnel_nic.c-60-{\n--\nnet/ipv4/udp_tunnel_nic.c=73=static bool\nnet/ipv4/udp_tunnel_nic.c:74:udp_tunnel_nic_entry_is_free(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c-75-{\n--\nnet/ipv4/udp_tunnel_nic.c=79=static bool\nnet/ipv4/udp_tunnel_nic.c:80:udp_tunnel_nic_entry_is_present(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c-81-{\n--\nnet/ipv4/udp_tunnel_nic.c=85=static bool\nnet/ipv4/udp_tunnel_nic.c:86:udp_tunnel_nic_entry_is_frozen(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c-87-{\n--\nnet/ipv4/udp_tunnel_nic.c=91=static void\nnet/ipv4/udp_tunnel_nic.c:92:udp_tunnel_nic_entry_freeze_used(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c-93-{\nnet/ipv4/udp_tunnel_nic.c:94:\tif (!udp_tunnel_nic_entry_is_free(entry))\nnet/ipv4/udp_tunnel_nic.c-95-\t\tentry-\u003eflags |= UDP_TUNNEL_NIC_ENTRY_FROZEN;\n--\nnet/ipv4/udp_tunnel_nic.c=98=static void\nnet/ipv4/udp_tunnel_nic.c:99:udp_tunnel_nic_entry_unfreeze(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c-100-{\n--\nnet/ipv4/udp_tunnel_nic.c=104=static bool\nnet/ipv4/udp_tunnel_nic.c:105:udp_tunnel_nic_entry_is_queued(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c-106-{\n--\nnet/ipv4/udp_tunnel_nic.c=111=static void\nnet/ipv4/udp_tunnel_nic.c:112:udp_tunnel_nic_entry_queue(struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c:113:\t\t\t struct udp_tunnel_nic_table_entry *entry,\nnet/ipv4/udp_tunnel_nic.c-114-\t\t\t unsigned int flag)\n--\nnet/ipv4/udp_tunnel_nic.c=120=static void\nnet/ipv4/udp_tunnel_nic.c:121:udp_tunnel_nic_ti_from_entry(struct udp_tunnel_nic_table_entry *entry,\nnet/ipv4/udp_tunnel_nic.c-122-\t\t\t struct udp_tunnel_info *ti)\n--\nnet/ipv4/udp_tunnel_nic.c=130=static bool\nnet/ipv4/udp_tunnel_nic.c:131:udp_tunnel_nic_is_empty(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-132-{\nnet/ipv4/udp_tunnel_nic.c:133:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-134-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-137-\t\tfor (j = 0; j \u003c info-\u003etables[i].n_entries; j++)\nnet/ipv4/udp_tunnel_nic.c:138:\t\t\tif (!udp_tunnel_nic_entry_is_free(\u0026utn-\u003eentries[i][j]))\nnet/ipv4/udp_tunnel_nic.c-139-\t\t\t\treturn false;\n--\nnet/ipv4/udp_tunnel_nic.c=143=static bool\nnet/ipv4/udp_tunnel_nic.c:144:udp_tunnel_nic_should_replay(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-145-{\nnet/ipv4/udp_tunnel_nic.c:146:\tconst struct udp_tunnel_nic_table_info *table;\nnet/ipv4/udp_tunnel_nic.c-147-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-152-\tfor (i = 0; i \u003c utn-\u003en_tables; i++) {\nnet/ipv4/udp_tunnel_nic.c:153:\t\ttable = \u0026dev-\u003eudp_tunnel_nic_info-\u003etables[i];\nnet/ipv4/udp_tunnel_nic.c-154-\t\tif (!test_bit(i, \u0026utn-\u003emissed))\n--\nnet/ipv4/udp_tunnel_nic.c-157-\t\tfor (j = 0; j \u003c table-\u003en_entries; j++)\nnet/ipv4/udp_tunnel_nic.c:158:\t\t\tif (udp_tunnel_nic_entry_is_free(\u0026utn-\u003eentries[i][j]))\nnet/ipv4/udp_tunnel_nic.c-159-\t\t\t\treturn true;\n--\nnet/ipv4/udp_tunnel_nic.c=165=static void\nnet/ipv4/udp_tunnel_nic.c:166:__udp_tunnel_nic_get_port(struct net_device *dev, unsigned int table,\nnet/ipv4/udp_tunnel_nic.c-167-\t\t\t unsigned int idx, struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-168-{\nnet/ipv4/udp_tunnel_nic.c:169:\tstruct udp_tunnel_nic_table_entry *entry;\nnet/ipv4/udp_tunnel_nic.c-170-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c-175-\tif (entry-\u003euse_cnt)\nnet/ipv4/udp_tunnel_nic.c:176:\t\tudp_tunnel_nic_ti_from_entry(entry, ti);\nnet/ipv4/udp_tunnel_nic.c-177-}\n--\nnet/ipv4/udp_tunnel_nic.c=179=static void\nnet/ipv4/udp_tunnel_nic.c:180:__udp_tunnel_nic_set_port_priv(struct net_device *dev, unsigned int table,\nnet/ipv4/udp_tunnel_nic.c-181-\t\t\t unsigned int idx, u8 priv)\n--\nnet/ipv4/udp_tunnel_nic.c=186=static void\nnet/ipv4/udp_tunnel_nic.c:187:udp_tunnel_nic_entry_update_done(struct udp_tunnel_nic_table_entry *entry,\nnet/ipv4/udp_tunnel_nic.c-188-\t\t\t\t int err)\n--\nnet/ipv4/udp_tunnel_nic.c=209=static void\nnet/ipv4/udp_tunnel_nic.c:210:udp_tunnel_nic_device_sync_one(struct net_device *dev,\nnet/ipv4/udp_tunnel_nic.c-211-\t\t\t struct udp_tunnel_nic *utn,\n--\nnet/ipv4/udp_tunnel_nic.c-213-{\nnet/ipv4/udp_tunnel_nic.c:214:\tstruct udp_tunnel_nic_table_entry *entry;\nnet/ipv4/udp_tunnel_nic.c-215-\tstruct udp_tunnel_info ti;\n--\nnet/ipv4/udp_tunnel_nic.c-218-\tentry = \u0026utn-\u003eentries[table][idx];\nnet/ipv4/udp_tunnel_nic.c:219:\tif (!udp_tunnel_nic_entry_is_queued(entry))\nnet/ipv4/udp_tunnel_nic.c-220-\t\treturn;\nnet/ipv4/udp_tunnel_nic.c-221-\nnet/ipv4/udp_tunnel_nic.c:222:\tudp_tunnel_nic_ti_from_entry(entry, \u0026ti);\nnet/ipv4/udp_tunnel_nic.c-223-\tif (entry-\u003eflags \u0026 UDP_TUNNEL_NIC_ENTRY_ADD)\nnet/ipv4/udp_tunnel_nic.c:224:\t\terr = dev-\u003eudp_tunnel_nic_info-\u003eset_port(dev, table, idx, \u0026ti);\nnet/ipv4/udp_tunnel_nic.c-225-\telse\nnet/ipv4/udp_tunnel_nic.c:226:\t\terr = dev-\u003eudp_tunnel_nic_info-\u003eunset_port(dev, table, idx,\nnet/ipv4/udp_tunnel_nic.c-227-\t\t\t\t\t\t\t \u0026ti);\nnet/ipv4/udp_tunnel_nic.c:228:\tudp_tunnel_nic_entry_update_done(entry, err);\nnet/ipv4/udp_tunnel_nic.c-229-\n--\nnet/ipv4/udp_tunnel_nic.c-233-\t\t\t be16_to_cpu(entry-\u003eport),\nnet/ipv4/udp_tunnel_nic.c:234:\t\t\t udp_tunnel_nic_tunnel_type_name(entry-\u003etype),\nnet/ipv4/udp_tunnel_nic.c-235-\t\t\t err);\n--\nnet/ipv4/udp_tunnel_nic.c=238=static void\nnet/ipv4/udp_tunnel_nic.c:239:udp_tunnel_nic_device_sync_by_port(struct net_device *dev,\nnet/ipv4/udp_tunnel_nic.c-240-\t\t\t\t struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-241-{\nnet/ipv4/udp_tunnel_nic.c:242:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-243-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-246-\t\tfor (j = 0; j \u003c info-\u003etables[i].n_entries; j++)\nnet/ipv4/udp_tunnel_nic.c:247:\t\t\tudp_tunnel_nic_device_sync_one(dev, utn, i, j);\nnet/ipv4/udp_tunnel_nic.c-248-}\n--\nnet/ipv4/udp_tunnel_nic.c=250=static void\nnet/ipv4/udp_tunnel_nic.c:251:udp_tunnel_nic_device_sync_by_table(struct net_device *dev,\nnet/ipv4/udp_tunnel_nic.c-252-\t\t\t\t struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-253-{\nnet/ipv4/udp_tunnel_nic.c:254:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-255-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-260-\t\tfor (j = 0; j \u003c info-\u003etables[i].n_entries; j++)\nnet/ipv4/udp_tunnel_nic.c:261:\t\t\tif (udp_tunnel_nic_entry_is_queued(\u0026utn-\u003eentries[i][j]))\nnet/ipv4/udp_tunnel_nic.c-262-\t\t\t\tbreak;\n--\nnet/ipv4/udp_tunnel_nic.c-271-\t\tfor (j = 0; j \u003c info-\u003etables[i].n_entries; j++) {\nnet/ipv4/udp_tunnel_nic.c:272:\t\t\tstruct udp_tunnel_nic_table_entry *entry;\nnet/ipv4/udp_tunnel_nic.c-273-\nnet/ipv4/udp_tunnel_nic.c-274-\t\t\tentry = \u0026utn-\u003eentries[i][j];\nnet/ipv4/udp_tunnel_nic.c:275:\t\t\tif (udp_tunnel_nic_entry_is_queued(entry))\nnet/ipv4/udp_tunnel_nic.c:276:\t\t\t\tudp_tunnel_nic_entry_update_done(entry, err);\nnet/ipv4/udp_tunnel_nic.c-277-\t\t}\n--\nnet/ipv4/udp_tunnel_nic.c=281=static void\nnet/ipv4/udp_tunnel_nic.c:282:__udp_tunnel_nic_device_sync(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-283-{\n--\nnet/ipv4/udp_tunnel_nic.c-286-\nnet/ipv4/udp_tunnel_nic.c:287:\tif (dev-\u003eudp_tunnel_nic_info-\u003esync_table)\nnet/ipv4/udp_tunnel_nic.c:288:\t\tudp_tunnel_nic_device_sync_by_table(dev, utn);\nnet/ipv4/udp_tunnel_nic.c-289-\telse\nnet/ipv4/udp_tunnel_nic.c:290:\t\tudp_tunnel_nic_device_sync_by_port(dev, utn);\nnet/ipv4/udp_tunnel_nic.c-291-\n--\nnet/ipv4/udp_tunnel_nic.c-295-\t */\nnet/ipv4/udp_tunnel_nic.c:296:\tutn-\u003eneed_replay = udp_tunnel_nic_should_replay(dev, utn);\nnet/ipv4/udp_tunnel_nic.c-297-}\n--\nnet/ipv4/udp_tunnel_nic.c=299=static void\nnet/ipv4/udp_tunnel_nic.c:300:udp_tunnel_nic_device_sync(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-301-{\n--\nnet/ipv4/udp_tunnel_nic.c-304-\nnet/ipv4/udp_tunnel_nic.c:305:\tqueue_delayed_work(udp_tunnel_nic_workqueue, \u0026utn-\u003ework, 0);\nnet/ipv4/udp_tunnel_nic.c-306-}\n--\nnet/ipv4/udp_tunnel_nic.c=308=static bool\nnet/ipv4/udp_tunnel_nic.c:309:udp_tunnel_nic_table_is_capable(const struct udp_tunnel_nic_table_info *table,\nnet/ipv4/udp_tunnel_nic.c-310-\t\t\t\tstruct udp_tunnel_info *ti)\n--\nnet/ipv4/udp_tunnel_nic.c=315=static bool\nnet/ipv4/udp_tunnel_nic.c:316:udp_tunnel_nic_is_capable(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-317-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-318-{\nnet/ipv4/udp_tunnel_nic.c:319:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-320-\tunsigned int i;\n--\nnet/ipv4/udp_tunnel_nic.c-327-\tfor (i = 0; i \u003c utn-\u003en_tables; i++)\nnet/ipv4/udp_tunnel_nic.c:328:\t\tif (udp_tunnel_nic_table_is_capable(\u0026info-\u003etables[i], ti))\nnet/ipv4/udp_tunnel_nic.c-329-\t\t\treturn true;\n--\nnet/ipv4/udp_tunnel_nic.c=333=static int\nnet/ipv4/udp_tunnel_nic.c:334:udp_tunnel_nic_has_collision(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-335-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-336-{\nnet/ipv4/udp_tunnel_nic.c:337:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c:338:\tstruct udp_tunnel_nic_table_entry *entry;\nnet/ipv4/udp_tunnel_nic.c-339-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-344-\nnet/ipv4/udp_tunnel_nic.c:345:\t\t\tif (!udp_tunnel_nic_entry_is_free(entry) \u0026\u0026\nnet/ipv4/udp_tunnel_nic.c-346-\t\t\t entry-\u003eport == ti-\u003eport \u0026\u0026\n--\nnet/ipv4/udp_tunnel_nic.c=355=static void\nnet/ipv4/udp_tunnel_nic.c:356:udp_tunnel_nic_entry_adj(struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-357-\t\t\t unsigned int table, unsigned int idx, int use_cnt_adj)\nnet/ipv4/udp_tunnel_nic.c-358-{\nnet/ipv4/udp_tunnel_nic.c:359:\tstruct udp_tunnel_nic_table_entry *entry = \u0026utn-\u003eentries[table][idx];\nnet/ipv4/udp_tunnel_nic.c-360-\tbool dodgy = entry-\u003eflags \u0026 UDP_TUNNEL_NIC_ENTRY_OP_FAIL;\n--\nnet/ipv4/udp_tunnel_nic.c-389-\nnet/ipv4/udp_tunnel_nic.c:390:\tudp_tunnel_nic_entry_queue(utn, entry, to);\nnet/ipv4/udp_tunnel_nic.c-391-}\n--\nnet/ipv4/udp_tunnel_nic.c=393=static bool\nnet/ipv4/udp_tunnel_nic.c:394:udp_tunnel_nic_entry_try_adj(struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-395-\t\t\t unsigned int table, unsigned int idx,\n--\nnet/ipv4/udp_tunnel_nic.c-397-{\nnet/ipv4/udp_tunnel_nic.c:398:\tstruct udp_tunnel_nic_table_entry *entry = \u0026utn-\u003eentries[table][idx];\nnet/ipv4/udp_tunnel_nic.c-399-\nnet/ipv4/udp_tunnel_nic.c:400:\tif (udp_tunnel_nic_entry_is_free(entry) ||\nnet/ipv4/udp_tunnel_nic.c-401-\t entry-\u003eport != ti-\u003eport ||\n--\nnet/ipv4/udp_tunnel_nic.c-404-\nnet/ipv4/udp_tunnel_nic.c:405:\tif (udp_tunnel_nic_entry_is_frozen(entry))\nnet/ipv4/udp_tunnel_nic.c-406-\t\treturn true;\nnet/ipv4/udp_tunnel_nic.c-407-\nnet/ipv4/udp_tunnel_nic.c:408:\tudp_tunnel_nic_entry_adj(utn, table, idx, use_cnt_adj);\nnet/ipv4/udp_tunnel_nic.c-409-\treturn true;\n--\nnet/ipv4/udp_tunnel_nic.c=417=static bool\nnet/ipv4/udp_tunnel_nic.c:418:udp_tunnel_nic_try_existing(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-419-\t\t\t struct udp_tunnel_info *ti, int use_cnt_adj)\nnet/ipv4/udp_tunnel_nic.c-420-{\nnet/ipv4/udp_tunnel_nic.c:421:\tconst struct udp_tunnel_nic_table_info *table;\nnet/ipv4/udp_tunnel_nic.c-422-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-424-\tfor (i = 0; i \u003c utn-\u003en_tables; i++) {\nnet/ipv4/udp_tunnel_nic.c:425:\t\ttable = \u0026dev-\u003eudp_tunnel_nic_info-\u003etables[i];\nnet/ipv4/udp_tunnel_nic.c:426:\t\tif (!udp_tunnel_nic_table_is_capable(table, ti))\nnet/ipv4/udp_tunnel_nic.c-427-\t\t\tcontinue;\n--\nnet/ipv4/udp_tunnel_nic.c-429-\t\tfor (j = 0; j \u003c table-\u003en_entries; j++)\nnet/ipv4/udp_tunnel_nic.c:430:\t\t\tif (udp_tunnel_nic_entry_try_adj(utn, i, j, ti,\nnet/ipv4/udp_tunnel_nic.c-431-\t\t\t\t\t\t\t use_cnt_adj))\n--\nnet/ipv4/udp_tunnel_nic.c=438=static bool\nnet/ipv4/udp_tunnel_nic.c:439:udp_tunnel_nic_add_existing(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-440-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-441-{\nnet/ipv4/udp_tunnel_nic.c:442:\treturn udp_tunnel_nic_try_existing(dev, utn, ti, +1);\nnet/ipv4/udp_tunnel_nic.c-443-}\n--\nnet/ipv4/udp_tunnel_nic.c=445=static bool\nnet/ipv4/udp_tunnel_nic.c:446:udp_tunnel_nic_del_existing(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-447-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-448-{\nnet/ipv4/udp_tunnel_nic.c:449:\treturn udp_tunnel_nic_try_existing(dev, utn, ti, -1);\nnet/ipv4/udp_tunnel_nic.c-450-}\n--\nnet/ipv4/udp_tunnel_nic.c=452=static bool\nnet/ipv4/udp_tunnel_nic.c:453:udp_tunnel_nic_add_new(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-454-\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-455-{\nnet/ipv4/udp_tunnel_nic.c:456:\tconst struct udp_tunnel_nic_table_info *table;\nnet/ipv4/udp_tunnel_nic.c-457-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-459-\tfor (i = 0; i \u003c utn-\u003en_tables; i++) {\nnet/ipv4/udp_tunnel_nic.c:460:\t\ttable = \u0026dev-\u003eudp_tunnel_nic_info-\u003etables[i];\nnet/ipv4/udp_tunnel_nic.c:461:\t\tif (!udp_tunnel_nic_table_is_capable(table, ti))\nnet/ipv4/udp_tunnel_nic.c-462-\t\t\tcontinue;\n--\nnet/ipv4/udp_tunnel_nic.c-464-\t\tfor (j = 0; j \u003c table-\u003en_entries; j++) {\nnet/ipv4/udp_tunnel_nic.c:465:\t\t\tstruct udp_tunnel_nic_table_entry *entry;\nnet/ipv4/udp_tunnel_nic.c-466-\nnet/ipv4/udp_tunnel_nic.c-467-\t\t\tentry = \u0026utn-\u003eentries[i][j];\nnet/ipv4/udp_tunnel_nic.c:468:\t\t\tif (!udp_tunnel_nic_entry_is_free(entry))\nnet/ipv4/udp_tunnel_nic.c-469-\t\t\t\tcontinue;\n--\nnet/ipv4/udp_tunnel_nic.c-473-\t\t\tentry-\u003euse_cnt = 1;\nnet/ipv4/udp_tunnel_nic.c:474:\t\t\tudp_tunnel_nic_entry_queue(utn, entry,\nnet/ipv4/udp_tunnel_nic.c-475-\t\t\t\t\t\t UDP_TUNNEL_NIC_ENTRY_ADD);\n--\nnet/ipv4/udp_tunnel_nic.c=489=static void\nnet/ipv4/udp_tunnel_nic.c:490:__udp_tunnel_nic_add_port(struct net_device *dev, struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-491-{\nnet/ipv4/udp_tunnel_nic.c:492:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-493-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c-506-\nnet/ipv4/udp_tunnel_nic.c:507:\tif (!udp_tunnel_nic_is_capable(dev, utn, ti))\nnet/ipv4/udp_tunnel_nic.c-508-\t\treturn;\n--\nnet/ipv4/udp_tunnel_nic.c-513-\t */\nnet/ipv4/udp_tunnel_nic.c:514:\tif (udp_tunnel_nic_has_collision(dev, utn, ti))\nnet/ipv4/udp_tunnel_nic.c-515-\t\treturn;\nnet/ipv4/udp_tunnel_nic.c-516-\nnet/ipv4/udp_tunnel_nic.c:517:\tif (!udp_tunnel_nic_add_existing(dev, utn, ti))\nnet/ipv4/udp_tunnel_nic.c:518:\t\tudp_tunnel_nic_add_new(dev, utn, ti);\nnet/ipv4/udp_tunnel_nic.c-519-\nnet/ipv4/udp_tunnel_nic.c:520:\tudp_tunnel_nic_device_sync(dev, utn);\nnet/ipv4/udp_tunnel_nic.c-521-}\n--\nnet/ipv4/udp_tunnel_nic.c=523=static void\nnet/ipv4/udp_tunnel_nic.c:524:__udp_tunnel_nic_del_port(struct net_device *dev, struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-525-{\n--\nnet/ipv4/udp_tunnel_nic.c-531-\nnet/ipv4/udp_tunnel_nic.c:532:\tif (!udp_tunnel_nic_is_capable(dev, utn, ti))\nnet/ipv4/udp_tunnel_nic.c-533-\t\treturn;\nnet/ipv4/udp_tunnel_nic.c-534-\nnet/ipv4/udp_tunnel_nic.c:535:\tudp_tunnel_nic_del_existing(dev, utn, ti);\nnet/ipv4/udp_tunnel_nic.c-536-\nnet/ipv4/udp_tunnel_nic.c:537:\tudp_tunnel_nic_device_sync(dev, utn);\nnet/ipv4/udp_tunnel_nic.c-538-}\nnet/ipv4/udp_tunnel_nic.c-539-\nnet/ipv4/udp_tunnel_nic.c:540:static void __udp_tunnel_nic_reset_ntf(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c-541-{\nnet/ipv4/udp_tunnel_nic.c:542:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-543-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c-554-\t\tfor (j = 0; j \u003c info-\u003etables[i].n_entries; j++) {\nnet/ipv4/udp_tunnel_nic.c:555:\t\t\tstruct udp_tunnel_nic_table_entry *entry;\nnet/ipv4/udp_tunnel_nic.c-556-\n--\nnet/ipv4/udp_tunnel_nic.c-565-\nnet/ipv4/udp_tunnel_nic.c:566:\t\t\tudp_tunnel_nic_entry_queue(utn, entry,\nnet/ipv4/udp_tunnel_nic.c-567-\t\t\t\t\t\t UDP_TUNNEL_NIC_ENTRY_ADD);\n--\nnet/ipv4/udp_tunnel_nic.c-569-\nnet/ipv4/udp_tunnel_nic.c:570:\t__udp_tunnel_nic_device_sync(dev, utn);\nnet/ipv4/udp_tunnel_nic.c-571-\n--\nnet/ipv4/udp_tunnel_nic.c=575=static size_t\nnet/ipv4/udp_tunnel_nic.c:576:__udp_tunnel_nic_dump_size(struct net_device *dev, unsigned int table)\nnet/ipv4/udp_tunnel_nic.c-577-{\nnet/ipv4/udp_tunnel_nic.c:578:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-579-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c-588-\tfor (j = 0; j \u003c info-\u003etables[table].n_entries; j++) {\nnet/ipv4/udp_tunnel_nic.c:589:\t\tif (!udp_tunnel_nic_entry_is_present(\u0026utn-\u003eentries[table][j]))\nnet/ipv4/udp_tunnel_nic.c-590-\t\t\tcontinue;\n--\nnet/ipv4/udp_tunnel_nic.c=600=static int\nnet/ipv4/udp_tunnel_nic.c:601:__udp_tunnel_nic_dump_write(struct net_device *dev, unsigned int table,\nnet/ipv4/udp_tunnel_nic.c-602-\t\t\t struct sk_buff *skb)\nnet/ipv4/udp_tunnel_nic.c-603-{\nnet/ipv4/udp_tunnel_nic.c:604:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-605-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c-613-\tfor (j = 0; j \u003c info-\u003etables[table].n_entries; j++) {\nnet/ipv4/udp_tunnel_nic.c:614:\t\tif (!udp_tunnel_nic_entry_is_present(\u0026utn-\u003eentries[table][j]))\nnet/ipv4/udp_tunnel_nic.c-615-\t\t\tcontinue;\n--\nnet/ipv4/udp_tunnel_nic.c-636-\nnet/ipv4/udp_tunnel_nic.c:637:static void __udp_tunnel_nic_assert_locked(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c-638-{\n--\nnet/ipv4/udp_tunnel_nic.c-645-\nnet/ipv4/udp_tunnel_nic.c:646:static void __udp_tunnel_nic_lock(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c-647-{\n--\nnet/ipv4/udp_tunnel_nic.c-654-\nnet/ipv4/udp_tunnel_nic.c:655:static void __udp_tunnel_nic_unlock(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c-656-{\n--\nnet/ipv4/udp_tunnel_nic.c-663-\nnet/ipv4/udp_tunnel_nic.c:664:static const struct udp_tunnel_nic_ops __udp_tunnel_nic_ops = {\nnet/ipv4/udp_tunnel_nic.c:665:\t.get_port\t= __udp_tunnel_nic_get_port,\nnet/ipv4/udp_tunnel_nic.c:666:\t.set_port_priv\t= __udp_tunnel_nic_set_port_priv,\nnet/ipv4/udp_tunnel_nic.c:667:\t.add_port\t= __udp_tunnel_nic_add_port,\nnet/ipv4/udp_tunnel_nic.c:668:\t.del_port\t= __udp_tunnel_nic_del_port,\nnet/ipv4/udp_tunnel_nic.c:669:\t.reset_ntf\t= __udp_tunnel_nic_reset_ntf,\nnet/ipv4/udp_tunnel_nic.c:670:\t.dump_size\t= __udp_tunnel_nic_dump_size,\nnet/ipv4/udp_tunnel_nic.c:671:\t.dump_write\t= __udp_tunnel_nic_dump_write,\nnet/ipv4/udp_tunnel_nic.c:672:\t.assert_locked\t= __udp_tunnel_nic_assert_locked,\nnet/ipv4/udp_tunnel_nic.c:673:\t.lock\t\t= __udp_tunnel_nic_lock,\nnet/ipv4/udp_tunnel_nic.c:674:\t.unlock\t\t= __udp_tunnel_nic_unlock,\nnet/ipv4/udp_tunnel_nic.c-675-};\n--\nnet/ipv4/udp_tunnel_nic.c=677=static void\nnet/ipv4/udp_tunnel_nic.c:678:udp_tunnel_nic_flush(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-679-{\nnet/ipv4/udp_tunnel_nic.c:680:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-681-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-687-\t\t\tif (adj_cnt)\nnet/ipv4/udp_tunnel_nic.c:688:\t\t\t\tudp_tunnel_nic_entry_adj(utn, i, j, adj_cnt);\nnet/ipv4/udp_tunnel_nic.c-689-\t\t}\nnet/ipv4/udp_tunnel_nic.c-690-\nnet/ipv4/udp_tunnel_nic.c:691:\t__udp_tunnel_nic_device_sync(dev, utn);\nnet/ipv4/udp_tunnel_nic.c-692-\n--\nnet/ipv4/udp_tunnel_nic.c=700=static void\nnet/ipv4/udp_tunnel_nic.c:701:udp_tunnel_nic_replay(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-702-{\nnet/ipv4/udp_tunnel_nic.c:703:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c:704:\tstruct udp_tunnel_nic_shared_node *node;\nnet/ipv4/udp_tunnel_nic.c-705-\tunsigned int i, j;\n--\nnet/ipv4/udp_tunnel_nic.c-711-\t\tfor (j = 0; j \u003c info-\u003etables[i].n_entries; j++)\nnet/ipv4/udp_tunnel_nic.c:712:\t\t\tudp_tunnel_nic_entry_freeze_used(\u0026utn-\u003eentries[i][j]);\nnet/ipv4/udp_tunnel_nic.c-713-\tutn-\u003emissed = 0;\n--\nnet/ipv4/udp_tunnel_nic.c-724-\t\tfor (j = 0; j \u003c info-\u003etables[i].n_entries; j++)\nnet/ipv4/udp_tunnel_nic.c:725:\t\t\tudp_tunnel_nic_entry_unfreeze(\u0026utn-\u003eentries[i][j]);\nnet/ipv4/udp_tunnel_nic.c-726-}\nnet/ipv4/udp_tunnel_nic.c-727-\nnet/ipv4/udp_tunnel_nic.c:728:static void udp_tunnel_nic_device_sync_work(struct work_struct *work)\nnet/ipv4/udp_tunnel_nic.c-729-{\n--\nnet/ipv4/udp_tunnel_nic.c-733-\t/* We cannot block on RTNL here, otherwise we would deadlock with\nnet/ipv4/udp_tunnel_nic.c:734:\t * udp_tunnel_nic_unregister() calling cancel_delayed_work_sync()\nnet/ipv4/udp_tunnel_nic.c-735-\t * while holding RTNL. Requeue with 1 jiffy delay if RTNL is contended.\n--\nnet/ipv4/udp_tunnel_nic.c-737-\tif (!rtnl_trylock()) {\nnet/ipv4/udp_tunnel_nic.c:738:\t\tqueue_delayed_work(udp_tunnel_nic_workqueue, \u0026utn-\u003ework, 1);\nnet/ipv4/udp_tunnel_nic.c-739-\t\treturn;\n--\nnet/ipv4/udp_tunnel_nic.c-741-\tmutex_lock(\u0026utn-\u003elock);\nnet/ipv4/udp_tunnel_nic.c:742:\t__udp_tunnel_nic_device_sync(utn-\u003edev, utn);\nnet/ipv4/udp_tunnel_nic.c-743-\nnet/ipv4/udp_tunnel_nic.c-744-\tif (utn-\u003eneed_replay)\nnet/ipv4/udp_tunnel_nic.c:745:\t\tudp_tunnel_nic_replay(utn-\u003edev, utn);\nnet/ipv4/udp_tunnel_nic.c-746-\n--\nnet/ipv4/udp_tunnel_nic.c=751=static struct udp_tunnel_nic *\nnet/ipv4/udp_tunnel_nic.c:752:udp_tunnel_nic_alloc(const struct udp_tunnel_nic_info *info,\nnet/ipv4/udp_tunnel_nic.c-753-\t\t unsigned int n_tables)\n--\nnet/ipv4/udp_tunnel_nic.c-761-\tutn-\u003en_tables = n_tables;\nnet/ipv4/udp_tunnel_nic.c:762:\tINIT_DELAYED_WORK(\u0026utn-\u003ework, udp_tunnel_nic_device_sync_work);\nnet/ipv4/udp_tunnel_nic.c-763-\tmutex_init(\u0026utn-\u003elock);\n--\nnet/ipv4/udp_tunnel_nic.c-780-\nnet/ipv4/udp_tunnel_nic.c:781:static void udp_tunnel_nic_free(struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-782-{\n--\nnet/ipv4/udp_tunnel_nic.c-789-\nnet/ipv4/udp_tunnel_nic.c:790:static int udp_tunnel_nic_register(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c-791-{\nnet/ipv4/udp_tunnel_nic.c:792:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c:793:\tstruct udp_tunnel_nic_shared_node *node = NULL;\nnet/ipv4/udp_tunnel_nic.c-794-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c-831-\nnet/ipv4/udp_tunnel_nic.c:832:\tif (info-\u003eshared \u0026\u0026 info-\u003eshared-\u003eudp_tunnel_nic_info) {\nnet/ipv4/udp_tunnel_nic.c:833:\t\tutn = info-\u003eshared-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-834-\t} else {\nnet/ipv4/udp_tunnel_nic.c:835:\t\tutn = udp_tunnel_nic_alloc(info, n_tables);\nnet/ipv4/udp_tunnel_nic.c-836-\t\tif (!utn) {\n--\nnet/ipv4/udp_tunnel_nic.c-842-\tif (info-\u003eshared) {\nnet/ipv4/udp_tunnel_nic.c:843:\t\tif (!info-\u003eshared-\u003eudp_tunnel_nic_info) {\nnet/ipv4/udp_tunnel_nic.c-844-\t\t\tINIT_LIST_HEAD(\u0026info-\u003eshared-\u003edevices);\nnet/ipv4/udp_tunnel_nic.c:845:\t\t\tinfo-\u003eshared-\u003eudp_tunnel_nic_info = utn;\nnet/ipv4/udp_tunnel_nic.c-846-\t\t}\n--\nnet/ipv4/udp_tunnel_nic.c-855-\tif (!(info-\u003eflags \u0026 UDP_TUNNEL_NIC_INFO_OPEN_ONLY)) {\nnet/ipv4/udp_tunnel_nic.c:856:\t\tudp_tunnel_nic_lock(dev);\nnet/ipv4/udp_tunnel_nic.c-857-\t\tudp_tunnel_get_rx_info(dev);\nnet/ipv4/udp_tunnel_nic.c:858:\t\tudp_tunnel_nic_unlock(dev);\nnet/ipv4/udp_tunnel_nic.c-859-\t}\n--\nnet/ipv4/udp_tunnel_nic.c=864=static void\nnet/ipv4/udp_tunnel_nic.c:865:udp_tunnel_nic_unregister(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c-866-{\nnet/ipv4/udp_tunnel_nic.c:867:\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\nnet/ipv4/udp_tunnel_nic.c-868-\nnet/ipv4/udp_tunnel_nic.c:869:\tudp_tunnel_nic_lock(dev);\nnet/ipv4/udp_tunnel_nic.c-870-\n--\nnet/ipv4/udp_tunnel_nic.c-874-\tif (info-\u003eshared) {\nnet/ipv4/udp_tunnel_nic.c:875:\t\tstruct udp_tunnel_nic_shared_node *node, *first;\nnet/ipv4/udp_tunnel_nic.c-876-\n--\nnet/ipv4/udp_tunnel_nic.c-880-\t\tif (list_entry_is_head(node, \u0026info-\u003eshared-\u003edevices, list)) {\nnet/ipv4/udp_tunnel_nic.c:881:\t\t\tudp_tunnel_nic_unlock(dev);\nnet/ipv4/udp_tunnel_nic.c-882-\t\t\treturn;\n--\nnet/ipv4/udp_tunnel_nic.c-892-\t\t\tutn-\u003edev = first-\u003edev;\nnet/ipv4/udp_tunnel_nic.c:893:\t\t\tudp_tunnel_nic_unlock(dev);\nnet/ipv4/udp_tunnel_nic.c-894-\t\t\tgoto release_dev;\n--\nnet/ipv4/udp_tunnel_nic.c-896-\nnet/ipv4/udp_tunnel_nic.c:897:\t\tinfo-\u003eshared-\u003eudp_tunnel_nic_info = NULL;\nnet/ipv4/udp_tunnel_nic.c-898-\t}\n--\nnet/ipv4/udp_tunnel_nic.c-902-\t */\nnet/ipv4/udp_tunnel_nic.c:903:\tudp_tunnel_nic_flush(dev, utn);\nnet/ipv4/udp_tunnel_nic.c:904:\tudp_tunnel_nic_unlock(dev);\nnet/ipv4/udp_tunnel_nic.c-905-\n--\nnet/ipv4/udp_tunnel_nic.c-911-\nnet/ipv4/udp_tunnel_nic.c:912:\tudp_tunnel_nic_free(utn);\nnet/ipv4/udp_tunnel_nic.c-913-release_dev:\n--\nnet/ipv4/udp_tunnel_nic.c=918=static int\nnet/ipv4/udp_tunnel_nic.c:919:udp_tunnel_nic_netdevice_event(struct notifier_block *unused,\n\n"
} |
| 19/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 20523 output: 42 thoughts: 72 Thoughts: **Diving into the UDP Tunnel Implementation** Okay, so I'm looking at `udp_tunnel_nic.c` here. The quick scan tells me this isn't meant for direct module access; it's more of an internal piece, probably linked into the core UDP tunneling logic, likely within `net/ipv4/udp_tunnel_core.c`. Or maybe it's handling a netdevice notifier. I've got to find out which. My next step is to hone in on either the `udp_tunnel_nic_init` function or the `udp_tunnel_nic_netdevice_event` function. That's where the real action is, where I'll see how this thing gets integrated or how it's observing network events. Once I know *that*, I'll have a much better handle on its role within the larger system. |
| 20/2 | 2026/07/25 13:56 | tool | grepper |
0mArgs:{
"Expression": "udp_tunnel_nic_netdevice_event",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"Output": "net/ipv4/udp_tunnel_nic.c=918=static int\nnet/ipv4/udp_tunnel_nic.c:919:udp_tunnel_nic_netdevice_event(struct notifier_block *unused,\nnet/ipv4/udp_tunnel_nic.c-920-\t\t\t unsigned long event, void *ptr)\n--\nnet/ipv4/udp_tunnel_nic.c=969=static struct notifier_block udp_tunnel_nic_notifier_block __read_mostly = {\nnet/ipv4/udp_tunnel_nic.c:970:\t.notifier_call = udp_tunnel_nic_netdevice_event,\nnet/ipv4/udp_tunnel_nic.c-971-};\n"
} |
| 21/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 21013 output: 40 thoughts: 221 Thoughts: **Analyzing the UDP Tunnel NIC Driver** Okay, so I'm diving into `udp_tunnel_nic.c` to understand how this driver works. First thing I see is the registration of a netdevice notifier. I need to figure out the exposed functions. It looks like `udp_tunnel_nic_netdevice_event` is the key – that's where the action is. It calls things like `udp_tunnel_nic_register`, `udp_tunnel_nic_unregister`, and `udp_tunnel_nic_flush`. Alright, so the entry points are triggered by netdevice events: `NETDEV_REGISTER`, `NETDEV_UNREGISTER`, `NETDEV_UP`, `NETDEV_DOWN`… that makes sense. Then I see calls to `udp_tunnel_nic_add_port` and `udp_tunnel_nic_del_port`. Where are these triggered from? Oh, looks like they're called from `udp_tunnel_get_rx_info` or something similar. Wait, I need to double-check something. Is `udp_tunnel_nic_ops` used in `udp_tunnel_core.c`? No, it looks like it's static within `udp_tunnel_nic.c`. Okay, now I have to figure out where `__udp_tunnel_nic_ops` is used instead. That's the next point of interest. |
| 22/2 | 2026/07/25 13:56 | tool | grepper |
0mArgs:{
"Expression": "__udp_tunnel_nic_ops",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"Output": "net/ipv4/udp_tunnel_nic.c=655=static void __udp_tunnel_nic_unlock(struct net_device *dev)\n--\nnet/ipv4/udp_tunnel_nic.c-663-\nnet/ipv4/udp_tunnel_nic.c:664:static const struct udp_tunnel_nic_ops __udp_tunnel_nic_ops = {\nnet/ipv4/udp_tunnel_nic.c-665-\t.get_port\t= __udp_tunnel_nic_get_port,\n--\nnet/ipv4/udp_tunnel_nic.c=973=static int __init udp_tunnel_nic_init_module(void)\n--\nnet/ipv4/udp_tunnel_nic.c-981-\trtnl_lock();\nnet/ipv4/udp_tunnel_nic.c:982:\tudp_tunnel_nic_ops = \u0026__udp_tunnel_nic_ops;\nnet/ipv4/udp_tunnel_nic.c-983-\trtnl_unlock();\n"
} |
| 23/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 21839 output: 39 thoughts: 45 Thoughts: Here's my take on those thoughts: **Analyzing the `udp_tunnel_nic_ops` Pointer** Okay, so I see `udp_tunnel_nic_ops`. That's a global pointer, right? My initial guess is that it's likely defined in either `net/ipv4/udp_tunnel_core.c` or perhaps within `include/net/udp_tunnel.h`. Given its name, it probably has something to do with Network Interface Controller (NIC) operations for UDP tunnels. I'd need to confirm the exact location to know for certain, but those seem like the most logical places to start looking for its declaration. From there, I can trace its usage and figure out its purpose within the tunnel setup. |
| 24/2 | 2026/07/25 13:56 | tool | grepper |
0mError:no matches Args: {
"Expression": "udp_tunnel_nic_ops",
"PathPrefix": "net/ipv4/udp_tunnel_core.c"
}Results: {
"error": "no matches"
} |
| 25/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 22095 output: 36 thoughts: 15 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience: **Diving into the UDP Tunnel Header** Okay, time to get my hands dirty. I need to refresh my understanding of how this UDP tunneling is implemented, particularly at the kernel level. Let's start with a deep dive into the `include/net/udp_tunnel.h` header file. This is where I expect to find the core data structures and function prototypes that define the tunnel's behaviour. I'm looking for the essential building blocks: How does it handle encapsulation, what are the relevant control flags, what kind of socket options might be exposed, are there any custom protocol headers I need to know about? Are there any indications in here of potential race conditions or locking strategies I need to consider later on? I'll be meticulously examining the struct definitions, function declarations and any inline comments. This header file will provide the foundational context for dissecting the actual tunneling logic. Hopefully it's well-commented. I'll be mentally mapping the data flow to prepare for more intense debugging later. |
| 26/2 | 2026/07/25 13:56 | tool | grepper |
0mArgs:{
"Expression": "udp_tunnel_nic_ops",
"PathPrefix": "include/net/udp_tunnel.h"
}Results: {
"Output": "include/net/udp_tunnel.h=297=struct udp_tunnel_nic_info {\n--\ninclude/net/udp_tunnel.h-328- */\ninclude/net/udp_tunnel.h:329:struct udp_tunnel_nic_ops {\ninclude/net/udp_tunnel.h-330-\tvoid (*get_port)(struct net_device *dev, unsigned int table,\n--\ninclude/net/udp_tunnel.h-346-#ifdef CONFIG_INET\ninclude/net/udp_tunnel.h:347:extern const struct udp_tunnel_nic_ops *udp_tunnel_nic_ops;\ninclude/net/udp_tunnel.h-348-#else\ninclude/net/udp_tunnel.h:349:#define udp_tunnel_nic_ops\t((struct udp_tunnel_nic_ops *)NULL)\ninclude/net/udp_tunnel.h-350-#endif\n--\ninclude/net/udp_tunnel.h=353=udp_tunnel_nic_get_port(struct net_device *dev, unsigned int table,\n--\ninclude/net/udp_tunnel.h-363-\ninclude/net/udp_tunnel.h:364:\tif (udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h:365:\t\tudp_tunnel_nic_ops-\u003eget_port(dev, table, idx, ti);\ninclude/net/udp_tunnel.h-366-}\n--\ninclude/net/udp_tunnel.h=369=udp_tunnel_nic_set_port_priv(struct net_device *dev, unsigned int table,\n--\ninclude/net/udp_tunnel.h-371-{\ninclude/net/udp_tunnel.h:372:\tif (udp_tunnel_nic_ops) {\ninclude/net/udp_tunnel.h:373:\t\tudp_tunnel_nic_ops-\u003eassert_locked(dev);\ninclude/net/udp_tunnel.h:374:\t\tudp_tunnel_nic_ops-\u003eset_port_priv(dev, table, idx, priv);\ninclude/net/udp_tunnel.h-375-\t}\n--\ninclude/net/udp_tunnel.h=378=static inline void udp_tunnel_nic_assert_locked(struct net_device *dev)\ninclude/net/udp_tunnel.h-379-{\ninclude/net/udp_tunnel.h:380:\tif (udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h:381:\t\tudp_tunnel_nic_ops-\u003eassert_locked(dev);\ninclude/net/udp_tunnel.h-382-}\n--\ninclude/net/udp_tunnel.h=384=static inline void udp_tunnel_nic_lock(struct net_device *dev)\ninclude/net/udp_tunnel.h-385-{\ninclude/net/udp_tunnel.h:386:\tif (udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h:387:\t\tudp_tunnel_nic_ops-\u003elock(dev);\ninclude/net/udp_tunnel.h-388-}\n--\ninclude/net/udp_tunnel.h=390=static inline void udp_tunnel_nic_unlock(struct net_device *dev)\ninclude/net/udp_tunnel.h-391-{\ninclude/net/udp_tunnel.h:392:\tif (udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h:393:\t\tudp_tunnel_nic_ops-\u003eunlock(dev);\ninclude/net/udp_tunnel.h-394-}\n--\ninclude/net/udp_tunnel.h=397=udp_tunnel_nic_add_port(struct net_device *dev, struct udp_tunnel_info *ti)\n--\ninclude/net/udp_tunnel.h-400-\t\treturn;\ninclude/net/udp_tunnel.h:401:\tif (udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h:402:\t\tudp_tunnel_nic_ops-\u003eadd_port(dev, ti);\ninclude/net/udp_tunnel.h-403-}\n--\ninclude/net/udp_tunnel.h=406=udp_tunnel_nic_del_port(struct net_device *dev, struct udp_tunnel_info *ti)\n--\ninclude/net/udp_tunnel.h-409-\t\treturn;\ninclude/net/udp_tunnel.h:410:\tif (udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h:411:\t\tudp_tunnel_nic_ops-\u003edel_port(dev, ti);\ninclude/net/udp_tunnel.h-412-}\n--\ninclude/net/udp_tunnel.h=426=static inline void udp_tunnel_nic_reset_ntf(struct net_device *dev)\ninclude/net/udp_tunnel.h-427-{\ninclude/net/udp_tunnel.h:428:\tif (udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h:429:\t\tudp_tunnel_nic_ops-\u003ereset_ntf(dev);\ninclude/net/udp_tunnel.h-430-}\n--\ninclude/net/udp_tunnel.h=433=udp_tunnel_nic_dump_size(struct net_device *dev, unsigned int table)\n--\ninclude/net/udp_tunnel.h-436-\ninclude/net/udp_tunnel.h:437:\tif (!udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h-438-\t\treturn 0;\ninclude/net/udp_tunnel.h-439-\ninclude/net/udp_tunnel.h:440:\tudp_tunnel_nic_ops-\u003elock(dev);\ninclude/net/udp_tunnel.h:441:\tret = udp_tunnel_nic_ops-\u003edump_size(dev, table);\ninclude/net/udp_tunnel.h:442:\tudp_tunnel_nic_ops-\u003eunlock(dev);\ninclude/net/udp_tunnel.h-443-\n--\ninclude/net/udp_tunnel.h=448=udp_tunnel_nic_dump_write(struct net_device *dev, unsigned int table,\n--\ninclude/net/udp_tunnel.h-452-\ninclude/net/udp_tunnel.h:453:\tif (!udp_tunnel_nic_ops)\ninclude/net/udp_tunnel.h-454-\t\treturn 0;\ninclude/net/udp_tunnel.h-455-\ninclude/net/udp_tunnel.h:456:\tudp_tunnel_nic_ops-\u003elock(dev);\ninclude/net/udp_tunnel.h:457:\tret = udp_tunnel_nic_ops-\u003edump_write(dev, table, skb);\ninclude/net/udp_tunnel.h:458:\tudp_tunnel_nic_ops-\u003eunlock(dev);\ninclude/net/udp_tunnel.h-459-\n"
} |
| 27/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 24111 output: 29 thoughts: 48 Thoughts: Okay, here's my take on those thoughts, framed as my own: **Investigating the `udp_tunnel_nic_ops` structure** Right, so I see `udp_tunnel_nic_ops` is directly referenced by the inline functions defined in `include/net/udp_tunnel.h`. This suggests it's a critical structure, probably containing the function pointers that define the core operations for UDP tunnel network interfaces. Now, a good next step to understanding its usage would be to trace its interaction with other kernel components. Let's dig deeper and figure out where the `udp_tunnel_nic_add_port` function, a key function related to this interface, is actually *called* from. That'll tell me a lot about how these UDP tunnel interfaces are actually initialized and configured within the system, giving me context on the surrounding implementation details. |
| 28/2 | 2026/07/25 13:56 | tool | grepper |
0mArgs:{
"Expression": "udp_tunnel_nic_add_port",
"PathPrefix": ""
}Results: {
"Output": "include/net/udp_tunnel.h=396=static inline void\ninclude/net/udp_tunnel.h:397:udp_tunnel_nic_add_port(struct net_device *dev, struct udp_tunnel_info *ti)\ninclude/net/udp_tunnel.h-398-{\n--\nnet/ipv4/udp_tunnel_core.c=100=void udp_tunnel_push_rx_port(struct net_device *dev, struct sock *sk,\n--\nnet/ipv4/udp_tunnel_core.c-108-\nnet/ipv4/udp_tunnel_core.c:109:\tudp_tunnel_nic_add_port(dev, \u0026ti);\nnet/ipv4/udp_tunnel_core.c-110-}\n--\nnet/ipv4/udp_tunnel_core.c=127=void udp_tunnel_notify_add_rx_port(struct sock *sk, unsigned short type)\n--\nnet/ipv4/udp_tunnel_core.c-140-\t\tudp_tunnel_nic_lock(dev);\nnet/ipv4/udp_tunnel_core.c:141:\t\tudp_tunnel_nic_add_port(dev, \u0026ti);\nnet/ipv4/udp_tunnel_core.c-142-\t\tudp_tunnel_nic_unlock(dev);\n--\nnet/ipv4/udp_tunnel_nic.c=489=static void\nnet/ipv4/udp_tunnel_nic.c:490:__udp_tunnel_nic_add_port(struct net_device *dev, struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c-491-{\n--\nnet/ipv4/udp_tunnel_nic.c=664=static const struct udp_tunnel_nic_ops __udp_tunnel_nic_ops = {\n--\nnet/ipv4/udp_tunnel_nic.c-666-\t.set_port_priv\t= __udp_tunnel_nic_set_port_priv,\nnet/ipv4/udp_tunnel_nic.c:667:\t.add_port\t= __udp_tunnel_nic_add_port,\nnet/ipv4/udp_tunnel_nic.c-668-\t.del_port\t= __udp_tunnel_nic_del_port,\n"
} |
| 29/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 24947 output: 31 thoughts: 58 Thoughts: Okay, let's break this down. **Investigating the UDP Tunnel RX Port Function Calls** Right, so `udp_tunnel_notify_add_rx_port` and `udp_tunnel_push_rx_port` are the key functions here, and they're both getting called. They're *exported*, which immediately makes me think they're part of some public API or interface. My immediate question is where `udp_tunnel_notify_add_rx_port` is being called from. I need to understand the context of its invocation, so I can grasp its purpose and behavior. Time to trace those calls! |
| 30/2 | 2026/07/25 13:56 | tool | grepper |
0mArgs:{
"Expression": "udp_tunnel_notify_add_rx_port",
"PathPrefix": ""
}Results: {
"Output": "drivers/net/geneve.c=1011=static struct geneve_sock *geneve_socket_create(struct net *net,\n--\ndrivers/net/geneve.c-1035-\t/* Initialize the geneve udp offloads structure */\ndrivers/net/geneve.c:1036:\tudp_tunnel_notify_add_rx_port(sk, UDP_TUNNEL_TYPE_GENEVE);\ndrivers/net/geneve.c-1037-\n--\ndrivers/net/vxlan/vxlan_core.c=3577=static struct vxlan_sock *vxlan_socket_create(struct net *net, bool ipv6,\n--\ndrivers/net/vxlan/vxlan_core.c-3605-\thlist_add_head_rcu(\u0026vs-\u003ehlist, vs_head(net, port));\ndrivers/net/vxlan/vxlan_core.c:3606:\tudp_tunnel_notify_add_rx_port(sk,\ndrivers/net/vxlan/vxlan_core.c-3607-\t\t\t\t (vs-\u003eflags \u0026 VXLAN_F_GPE) ?\n--\ninclude/net/udp_tunnel.h=132=void udp_tunnel_drop_rx_port(struct net_device *dev, struct sock *sk,\ninclude/net/udp_tunnel.h-133-\t\t\t unsigned short type);\ninclude/net/udp_tunnel.h:134:void udp_tunnel_notify_add_rx_port(struct sock *sk, unsigned short type);\ninclude/net/udp_tunnel.h-135-void udp_tunnel_notify_del_rx_port(struct sock *sk, unsigned short type);\n--\nnet/ipv4/udp_tunnel_core.c=124=EXPORT_SYMBOL_GPL(udp_tunnel_drop_rx_port);\n--\nnet/ipv4/udp_tunnel_core.c-126-/* Notify netdevs that UDP port started listening */\nnet/ipv4/udp_tunnel_core.c:127:void udp_tunnel_notify_add_rx_port(struct sock *sk, unsigned short type)\nnet/ipv4/udp_tunnel_core.c-128-{\n--\nnet/ipv4/udp_tunnel_core.c-144-}\nnet/ipv4/udp_tunnel_core.c:145:EXPORT_SYMBOL_GPL(udp_tunnel_notify_add_rx_port);\nnet/ipv4/udp_tunnel_core.c-146-\n"
} |
| 31/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 25799 output: 31 thoughts: 131 Thoughts: **Investigating UDP Tunnel Offload for VXLAN and GENEVE in QEMU** Okay, so I'm digging into how `VXLAN` and `GENEVE` handle UDP tunnels, and it looks like they ultimately call `udp_tunnel_notify_add_rx_port`. Right away, this tells me that we need to ensure both `VXLAN` and `GENEVE` are activated within `EnableConfigs`. But it's not enough to simply enable the protocols: I have to think about offloading. My mind immediately jumps to `udp_tunnel_nic.c`. This is where the magic happens for offloading UDP tunnels to the NIC, and now I'm curious if we can trigger this code path within a QEMU environment. The next logical step is to see if any emulated NIC supports this kind of UDP tunnel offload. I know that `udp_tunnel_nic_info` is registered by the NIC driver itself, so that's the key. I have to shift my focus and start looking at which specific NIC drivers actually register this information. That's where the real answer will lie. |
| 32/2 | 2026/07/25 13:56 | tool | grepper |
0mArgs:{
"Expression": "udp_tunnel_nic_info",
"PathPrefix": "drivers/net/"
}Results: {
"Output": "drivers/net/ethernet/amd/xgbe/xgbe-drv.c=895=static int xgbe_vxlan_unset_port(struct net_device *netdev, unsigned int table,\n--\ndrivers/net/ethernet/amd/xgbe/xgbe-drv.c-905-\ndrivers/net/ethernet/amd/xgbe/xgbe-drv.c:906:static const struct udp_tunnel_nic_info xgbe_udp_tunnels = {\ndrivers/net/ethernet/amd/xgbe/xgbe-drv.c-907-\t.set_port\t= xgbe_vxlan_set_port,\n--\ndrivers/net/ethernet/amd/xgbe/xgbe-drv.c-914-\ndrivers/net/ethernet/amd/xgbe/xgbe-drv.c:915:const struct udp_tunnel_nic_info *xgbe_get_udp_tunnel_info(void)\ndrivers/net/ethernet/amd/xgbe/xgbe-drv.c-916-{\n--\ndrivers/net/ethernet/amd/xgbe/xgbe-main.c=152=int xgbe_config_netdev(struct xgbe_prv_data *pdata)\n--\ndrivers/net/ethernet/amd/xgbe/xgbe-main.c-262-\ndrivers/net/ethernet/amd/xgbe/xgbe-main.c:263:\t\tnetdev-\u003eudp_tunnel_nic_info = xgbe_get_udp_tunnel_info();\ndrivers/net/ethernet/amd/xgbe/xgbe-main.c-264-\t}\n--\ndrivers/net/ethernet/amd/xgbe/xgbe.h=1296=const struct ethtool_ops *xgbe_get_ethtool_ops(void);\ndrivers/net/ethernet/amd/xgbe/xgbe.h:1297:const struct udp_tunnel_nic_info *xgbe_get_udp_tunnel_info(void);\ndrivers/net/ethernet/amd/xgbe/xgbe.h-1298-\n--\ndrivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c=10211=static int bnx2x_udp_tunnel_sync(struct net_device *netdev, unsigned int table)\n--\ndrivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c-10221-\ndrivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c:10222:static const struct udp_tunnel_nic_info bnx2x_udp_tunnels = {\ndrivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c-10223-\t.sync_table\t= bnx2x_udp_tunnel_sync,\n--\ndrivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c=13040=static int bnx2x_init_dev(struct bnx2x *bp, struct pci_dev *pdev,\n--\ndrivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c-13207-\t\tif (IS_PF(bp))\ndrivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c:13208:\t\t\tdev-\u003eudp_tunnel_nic_info = \u0026bnx2x_udp_tunnels;\ndrivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c-13209-\t}\n--\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c=15962=static int bnxt_udp_tunnel_unset_port(struct net_device *netdev, unsigned int table,\n--\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c-15977-\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c:15978:static const struct udp_tunnel_nic_info bnxt_udp_tunnels = {\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c-15979-\t.set_port\t= bnxt_udp_tunnel_set_port,\n--\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c=16945=static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)\n--\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c-17052-\tif (bp-\u003eflags \u0026 BNXT_FLAG_CHIP_P7)\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c:17053:\t\tdev-\u003eudp_tunnel_nic_info = \u0026bnxt_udp_tunnels_p7;\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c-17054-\telse\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c:17055:\t\tdev-\u003eudp_tunnel_nic_info = \u0026bnxt_udp_tunnels;\ndrivers/net/ethernet/broadcom/bnxt/bnxt.c-17056-\n--\ndrivers/net/ethernet/cavium/liquidio/lio_main.c=2685=static int liquidio_udp_tunnel_unset_port(struct net_device *netdev,\n--\ndrivers/net/ethernet/cavium/liquidio/lio_main.c-2695-\ndrivers/net/ethernet/cavium/liquidio/lio_main.c:2696:static const struct udp_tunnel_nic_info liquidio_udp_tunnels = {\ndrivers/net/ethernet/cavium/liquidio/lio_main.c-2697-\t.set_port\t= liquidio_udp_tunnel_set_port,\n--\ndrivers/net/ethernet/cavium/liquidio/lio_main.c=3322=static int setup_nic_devices(struct octeon_device *octeon_dev)\n--\ndrivers/net/ethernet/cavium/liquidio/lio_main.c-3582-\ndrivers/net/ethernet/cavium/liquidio/lio_main.c:3583:\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026liquidio_udp_tunnels;\ndrivers/net/ethernet/cavium/liquidio/lio_main.c-3584-\n--\ndrivers/net/ethernet/cavium/liquidio/lio_vf_main.c=1772=static int liquidio_udp_tunnel_unset_port(struct net_device *netdev,\n--\ndrivers/net/ethernet/cavium/liquidio/lio_vf_main.c-1782-\ndrivers/net/ethernet/cavium/liquidio/lio_vf_main.c:1783:static const struct udp_tunnel_nic_info liquidio_udp_tunnels = {\ndrivers/net/ethernet/cavium/liquidio/lio_vf_main.c-1784-\t.set_port\t= liquidio_udp_tunnel_set_port,\n--\ndrivers/net/ethernet/cavium/liquidio/lio_vf_main.c=1919=static int setup_nic_devices(struct octeon_device *octeon_dev)\n--\ndrivers/net/ethernet/cavium/liquidio/lio_vf_main.c-2093-\t\t (lio-\u003eenc_dev_capability \u0026 ~NETIF_F_LRO);\ndrivers/net/ethernet/cavium/liquidio/lio_vf_main.c:2094:\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026liquidio_udp_tunnels;\ndrivers/net/ethernet/cavium/liquidio/lio_vf_main.c-2095-\n--\ndrivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c=3770=static int cxgb_udp_tunnel_set_port(struct net_device *netdev,\n--\ndrivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c-3817-\ndrivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:3818:static const struct udp_tunnel_nic_info cxgb_udp_tunnels = {\ndrivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c-3819-\t.set_port\t= cxgb_udp_tunnel_set_port,\n--\ndrivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c=6571=static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)\n--\ndrivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c-6800-\t\t\tif (adapter-\u003erawf_cnt)\ndrivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c:6801:\t\t\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026cxgb_udp_tunnels;\ndrivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c-6802-\t\t}\n--\ndrivers/net/ethernet/cisco/enic/enic_main.c=207=static int enic_udp_tunnel_unset_port(struct net_device *netdev,\n--\ndrivers/net/ethernet/cisco/enic/enic_main.c-228-\ndrivers/net/ethernet/cisco/enic/enic_main.c:229:static const struct udp_tunnel_nic_info enic_udp_tunnels = {\ndrivers/net/ethernet/cisco/enic/enic_main.c-230-\t.set_port\t= enic_udp_tunnel_set_port,\n--\ndrivers/net/ethernet/cisco/enic/enic_main.c=2675=static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)\n--\ndrivers/net/ethernet/cisco/enic/enic_main.c-2948-\t\t enic-\u003evxlan.flags \u0026 ENIC_VXLAN_MULTI_WQ) {\ndrivers/net/ethernet/cisco/enic/enic_main.c:2949:\t\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026enic_udp_tunnels_v4;\ndrivers/net/ethernet/cisco/enic/enic_main.c-2950-\t\t\tif (enic-\u003evxlan.flags \u0026 ENIC_VXLAN_OUTER_IPV6)\ndrivers/net/ethernet/cisco/enic/enic_main.c:2951:\t\t\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026enic_udp_tunnels;\ndrivers/net/ethernet/cisco/enic/enic_main.c-2952-\t\t}\n--\ndrivers/net/ethernet/emulex/benet/be_main.c=4015=static int be_vxlan_unset_port(struct net_device *netdev, unsigned int table,\n--\ndrivers/net/ethernet/emulex/benet/be_main.c-4033-\ndrivers/net/ethernet/emulex/benet/be_main.c:4034:static const struct udp_tunnel_nic_info be_udp_tunnels = {\ndrivers/net/ethernet/emulex/benet/be_main.c-4035-\t.set_port\t= be_vxlan_set_port,\n--\ndrivers/net/ethernet/emulex/benet/be_main.c=5179=static void be_netdev_init(struct net_device *netdev)\n--\ndrivers/net/ethernet/emulex/benet/be_main.c-5207-\tif (!lancer_chip(adapter) \u0026\u0026 !BEx_chip(adapter) \u0026\u0026 !be_is_mc(adapter))\ndrivers/net/ethernet/emulex/benet/be_main.c:5208:\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026be_udp_tunnels;\ndrivers/net/ethernet/emulex/benet/be_main.c-5209-\n--\ndrivers/net/ethernet/intel/fm10k/fm10k_netdev.c=402=static int fm10k_udp_tunnel_sync(struct net_device *dev, unsigned int table)\n--\ndrivers/net/ethernet/intel/fm10k/fm10k_netdev.c-416-\ndrivers/net/ethernet/intel/fm10k/fm10k_netdev.c:417:static const struct udp_tunnel_nic_info fm10k_udp_tunnels = {\ndrivers/net/ethernet/intel/fm10k/fm10k_netdev.c-418-\t.sync_table\t= fm10k_udp_tunnel_sync,\n--\ndrivers/net/ethernet/intel/fm10k/fm10k_netdev.c=1541=struct net_device *fm10k_alloc_netdev(const struct fm10k_info *info)\n--\ndrivers/net/ethernet/intel/fm10k/fm10k_netdev.c-1580-\ndrivers/net/ethernet/intel/fm10k/fm10k_netdev.c:1581:\t\tdev-\u003eudp_tunnel_nic_info = \u0026fm10k_udp_tunnels;\ndrivers/net/ethernet/intel/fm10k/fm10k_netdev.c-1582-\t}\n--\ndrivers/net/ethernet/intel/i40e/i40e.h=468=struct i40e_pf {\n--\ndrivers/net/ethernet/intel/i40e/i40e.h-521-\tstruct udp_tunnel_nic_shared udp_tunnel_shared;\ndrivers/net/ethernet/intel/i40e/i40e.h:522:\tstruct udp_tunnel_nic_info udp_tunnel_nic;\ndrivers/net/ethernet/intel/i40e/i40e.h-523-\n--\ndrivers/net/ethernet/intel/i40e/i40e_main.c=13637=static int i40e_config_netdev(struct i40e_vsi *vsi)\n--\ndrivers/net/ethernet/intel/i40e/i40e_main.c-13680-\ndrivers/net/ethernet/intel/i40e/i40e_main.c:13681:\tnetdev-\u003eudp_tunnel_nic_info = \u0026pf-\u003eudp_tunnel_nic;\ndrivers/net/ethernet/intel/i40e/i40e_main.c-13682-\n--\ndrivers/net/ethernet/intel/ice/ice_main.c=3443=static void ice_set_ops(struct ice_vsi *vsi)\n--\ndrivers/net/ethernet/intel/ice/ice_main.c-3454-\tnetdev-\u003enetdev_ops = \u0026ice_netdev_ops;\ndrivers/net/ethernet/intel/ice/ice_main.c:3455:\tnetdev-\u003eudp_tunnel_nic_info = \u0026pf-\u003ehw.udp_tunnel_nic;\ndrivers/net/ethernet/intel/ice/ice_main.c-3456-\tnetdev-\u003exdp_metadata_ops = \u0026ice_xdp_md_ops;\n--\ndrivers/net/ethernet/intel/ice/ice_main.c=3970=int ice_init_pf(struct ice_pf *pf)\ndrivers/net/ethernet/intel/ice/ice_main.c-3971-{\ndrivers/net/ethernet/intel/ice/ice_main.c:3972:\tstruct udp_tunnel_nic_info *udp_tunnel_nic = \u0026pf-\u003ehw.udp_tunnel_nic;\ndrivers/net/ethernet/intel/ice/ice_main.c-3973-\tstruct device *dev = ice_pf_to_dev(pf);\n--\ndrivers/net/ethernet/intel/ice/ice_type.h=899=struct ice_hw {\n--\ndrivers/net/ethernet/intel/ice/ice_type.h-1011-\tstruct udp_tunnel_nic_shared udp_tunnel_shared;\ndrivers/net/ethernet/intel/ice/ice_type.h:1012:\tstruct udp_tunnel_nic_info udp_tunnel_nic;\ndrivers/net/ethernet/intel/ice/ice_type.h-1013-\n--\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c=5448=static int ixgbe_udp_tunnel_sync(struct net_device *dev, unsigned int table)\n--\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c-5466-\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c:5467:static const struct udp_tunnel_nic_info ixgbe_udp_tunnels_x550 = {\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c-5468-\t.sync_table\t= ixgbe_udp_tunnel_sync,\n--\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c-5474-\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c:5475:static const struct udp_tunnel_nic_info ixgbe_udp_tunnels_x550em_a = {\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c-5476-\t.sync_table\t= ixgbe_udp_tunnel_sync,\n--\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c=11548=static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)\n--\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c-11699-\tcase ixgbe_mac_e610:\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c:11700:\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026ixgbe_udp_tunnels_x550;\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c-11701-\t\tbreak;\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c-11702-\tcase ixgbe_mac_x550em_a:\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c:11703:\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026ixgbe_udp_tunnels_x550em_a;\ndrivers/net/ethernet/intel/ixgbe/ixgbe_main.c-11704-\t\tbreak;\n--\ndrivers/net/ethernet/mellanox/mlx4/en_netdev.c=2639=static int mlx4_udp_tunnel_sync(struct net_device *dev, unsigned int table)\n--\ndrivers/net/ethernet/mellanox/mlx4/en_netdev.c-2656-\ndrivers/net/ethernet/mellanox/mlx4/en_netdev.c:2657:static const struct udp_tunnel_nic_info mlx4_udp_tunnels = {\ndrivers/net/ethernet/mellanox/mlx4/en_netdev.c-2658-\t.sync_table\t= mlx4_udp_tunnel_sync,\n--\ndrivers/net/ethernet/mellanox/mlx4/en_netdev.c=3161=int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,\n--\ndrivers/net/ethernet/mellanox/mlx4/en_netdev.c-3346-\ndrivers/net/ethernet/mellanox/mlx4/en_netdev.c:3347:\t\tdev-\u003eudp_tunnel_nic_info = \u0026mlx4_udp_tunnels;\ndrivers/net/ethernet/mellanox/mlx4/en_netdev.c-3348-\t}\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en.h=905=struct mlx5e_priv {\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en.h-956-\ndrivers/net/ethernet/mellanox/mlx5/core/en.h:957:\tstruct udp_tunnel_nic_info nic_info;\ndrivers/net/ethernet/mellanox/mlx5/core/en.h-958-#ifdef CONFIG_MLX5_CORE_EN_DCB\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c=5457=void mlx5e_vxlan_set_netdev_info(struct mlx5e_priv *priv)\n--\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-5469-\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c:5470:\tpriv-\u003enetdev-\u003eudp_tunnel_nic_info = \u0026priv-\u003enic_info;\ndrivers/net/ethernet/mellanox/mlx5/core/en_main.c-5471-}\n--\ndrivers/net/ethernet/netronome/nfp/nfp_net_common.c=2376=static int nfp_udp_tunnel_sync(struct net_device *netdev, unsigned int table)\n--\ndrivers/net/ethernet/netronome/nfp/nfp_net_common.c-2394-\ndrivers/net/ethernet/netronome/nfp/nfp_net_common.c:2395:static const struct udp_tunnel_nic_info nfp_udp_tunnels = {\ndrivers/net/ethernet/netronome/nfp/nfp_net_common.c-2396-\t.sync_table = nfp_udp_tunnel_sync,\n--\ndrivers/net/ethernet/netronome/nfp/nfp_net_common.c=2666=static void nfp_net_netdev_init(struct nfp_net *nn)\n--\ndrivers/net/ethernet/netronome/nfp/nfp_net_common.c-2718-\t\t}\ndrivers/net/ethernet/netronome/nfp/nfp_net_common.c:2719:\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026nfp_udp_tunnels;\ndrivers/net/ethernet/netronome/nfp/nfp_net_common.c-2720-\t\tnn-\u003edp.ctrl |= NFP_NET_CFG_CTRL_VXLAN;\n--\ndrivers/net/ethernet/qlogic/qede/qede_filter.c=957=static int qede_udp_tunnel_sync(struct net_device *dev, unsigned int table)\n--\ndrivers/net/ethernet/qlogic/qede/qede_filter.c-987-\ndrivers/net/ethernet/qlogic/qede/qede_filter.c:988:static const struct udp_tunnel_nic_info qede_udp_tunnels_both = {\ndrivers/net/ethernet/qlogic/qede/qede_filter.c-989-\t.sync_table\t= qede_udp_tunnel_sync,\n--\ndrivers/net/ethernet/qlogic/qede/qede_filter.c=1006=void qede_set_udp_tunnels(struct qede_dev *edev)\n--\ndrivers/net/ethernet/qlogic/qede/qede_filter.c-1009-\t edev-\u003edev_info.common.geneve_enable)\ndrivers/net/ethernet/qlogic/qede/qede_filter.c:1010:\t\tedev-\u003endev-\u003eudp_tunnel_nic_info = \u0026qede_udp_tunnels_both;\ndrivers/net/ethernet/qlogic/qede/qede_filter.c-1011-\telse if (edev-\u003edev_info.common.vxlan_enable)\ndrivers/net/ethernet/qlogic/qede/qede_filter.c:1012:\t\tedev-\u003endev-\u003eudp_tunnel_nic_info = \u0026qede_udp_tunnels_vxlan;\ndrivers/net/ethernet/qlogic/qede/qede_filter.c-1013-\telse if (edev-\u003edev_info.common.geneve_enable)\ndrivers/net/ethernet/qlogic/qede/qede_filter.c:1014:\t\tedev-\u003endev-\u003eudp_tunnel_nic_info = \u0026qede_udp_tunnels_geneve;\ndrivers/net/ethernet/qlogic/qede/qede_filter.c-1015-}\n--\ndrivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c=471=static int qlcnic_udp_tunnel_sync(struct net_device *dev, unsigned int table)\n--\ndrivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c-486-\ndrivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c:487:static const struct udp_tunnel_nic_info qlcnic_udp_tunnels = {\ndrivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c-488-\t.sync_table\t= qlcnic_udp_tunnel_sync,\n--\ndrivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c=2254=qlcnic_setup_netdev(struct qlcnic_adapter *adapter, struct net_device *netdev)\n--\ndrivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c-2303-\ndrivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c:2304:\t\tnetdev-\u003eudp_tunnel_nic_info = \u0026qlcnic_udp_tunnels;\ndrivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c-2305-\t}\n--\ndrivers/net/ethernet/sfc/ef10.c=42=static int efx_ef10_set_udp_tnl_ports(struct efx_nic *efx, bool unloading);\ndrivers/net/ethernet/sfc/ef10.c:43:static const struct udp_tunnel_nic_info efx_ef10_udp_tunnels;\ndrivers/net/ethernet/sfc/ef10.c-44-\n--\ndrivers/net/ethernet/sfc/ef10.c=525=static int efx_ef10_probe(struct efx_nic *efx)\n--\ndrivers/net/ethernet/sfc/ef10.c-680-\t (1 \u003c\u003c MC_CMD_DRV_ATTACH_EXT_OUT_FLAG_TRUSTED))\ndrivers/net/ethernet/sfc/ef10.c:681:\t\tefx-\u003enet_dev-\u003eudp_tunnel_nic_info = \u0026efx_ef10_udp_tunnels;\ndrivers/net/ethernet/sfc/ef10.c-682-\n--\ndrivers/net/ethernet/sfc/ef10.c=3962=static int efx_ef10_udp_tnl_unset_port(struct net_device *dev,\n--\ndrivers/net/ethernet/sfc/ef10.c-3984-\ndrivers/net/ethernet/sfc/ef10.c:3985:static const struct udp_tunnel_nic_info efx_ef10_udp_tunnels = {\ndrivers/net/ethernet/sfc/ef10.c-3986-\t.set_port\t= efx_ef10_udp_tnl_set_port,\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c=619=static int txgbe_udp_tunnel_sync(struct net_device *dev, unsigned int table)\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-641-\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c:642:static const struct udp_tunnel_nic_info txgbe_udp_tunnels = {\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-643-\t.sync_table\t= txgbe_udp_tunnel_sync,\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c=681=static int txgbe_probe(struct pci_dev *pdev,\n--\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-747-\tnetdev-\u003enetdev_ops = \u0026txgbe_netdev_ops;\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c:748:\tnetdev-\u003eudp_tunnel_nic_info = \u0026txgbe_udp_tunnels;\ndrivers/net/ethernet/wangxun/txgbe/txgbe_main.c-749-\n--\ndrivers/net/netdevsim/udp_tunnels.c=66=nsim_udp_tunnel_sync_table(struct net_device *dev, unsigned int table)\n--\ndrivers/net/netdevsim/udp_tunnels.c-84-\ndrivers/net/netdevsim/udp_tunnels.c:85:static const struct udp_tunnel_nic_info nsim_udp_tunnel_info = {\ndrivers/net/netdevsim/udp_tunnels.c-86-\t.set_port\t= nsim_udp_tunnel_set_port,\n--\ndrivers/net/netdevsim/udp_tunnels.c=125=int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,\n--\ndrivers/net/netdevsim/udp_tunnels.c-128-\tstruct netdevsim *ns = netdev_priv(dev);\ndrivers/net/netdevsim/udp_tunnels.c:129:\tstruct udp_tunnel_nic_info *info;\ndrivers/net/netdevsim/udp_tunnels.c-130-\n--\ndrivers/net/netdevsim/udp_tunnels.c-184-\ndrivers/net/netdevsim/udp_tunnels.c:185:\tdev-\u003eudp_tunnel_nic_info = info;\ndrivers/net/netdevsim/udp_tunnels.c-186-\treturn 0;\n--\ndrivers/net/netdevsim/udp_tunnels.c=189=void nsim_udp_tunnels_info_destroy(struct net_device *dev)\n--\ndrivers/net/netdevsim/udp_tunnels.c-193-\tdebugfs_remove_recursive(ns-\u003eudp_ports.ddir);\ndrivers/net/netdevsim/udp_tunnels.c:194:\tkfree(dev-\u003eudp_tunnel_nic_info);\ndrivers/net/netdevsim/udp_tunnels.c:195:\tdev-\u003eudp_tunnel_nic_info = NULL;\ndrivers/net/netdevsim/udp_tunnels.c-196-}\n"
} |
| 33/2 | 2026/07/25 13:56 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 34202 output: 56 thoughts: 434 Thoughts: **Analyzing UDP Tunnel Testing in a Kernel Context** Okay, so I see that `drivers/net/netdevsim/udp_tunnels.c` registers `udp_tunnel_nic_info`. That's a key observation. This immediately tells me that we can leverage `netdevsim` to test this feature. Brilliant! Using `netdevsim`, which is a software-emulated device, makes offload testing in the kernel a breeze, especially in virtualized environments. This means I can confirm this code path is definitely reachable and testable. Next, I need to understand the configuration. Let's look at `drivers/net/netdevsim/Kconfig` to figure out what enables `netdevsim`. Ah, it's `CONFIG_NETDEVSIM`. So, I'll definitely need to add `NETDEVSIM` to `EnableConfigs` to make sure `netdevsim` is enabled in my build. And, I'll need `VXLAN` and `GENEVE` as well to trigger the UDP tunnel creation. I'm going to revisit `net/ipv4/udp_tunnel_nic.c` to look at the important symbols again, specifically those that have been modified by the patch. I see that the patch touches: `udp_tunnel_nic_device_sync`, `udp_tunnel_nic_device_sync_work`, `udp_tunnel_nic_alloc`, and `udp_tunnel_nic_unregister`. Wait a minute, all those functions are declared `static`. That might complicate things a little. `udp_tunnel_nic_device_sync` is static. `udp_tunnel_nic_device_sync_work` is static. `udp_tunnel_nic_alloc` is static. And, `udp_tunnel_nic_unregister` is static. Hold on, I need to think this through. If they're static, they might be inlined or not have distinct symbol addresses, but `udp_tunnel_nic_device_sync_work` is a workqueue callback, so it can't be inlined. And `udp_tunnel_nic_unregister` is called from `udp_tunnel_nic_netdevice_event`, which is a notifier callback. So, it has to be reachable. Time to check what non-static functions are actually in `net/ipv4/udp_tunnel_nic.c`. Actually, I've already grepped for `EXPORT_SYMBOL`, and found nothing. Are there *any* non-static functions in `net/ipv4/udp_tunnel_nic.c` at all? |
| 34/2 | 2026/07/25 13:56 | tool | grepper |
0mArgs:{
"Expression": "^[a-zA-Z_][a-zA-Z0-9_]* udp_tunnel_nic_",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"Output": "net/ipv4/udp_tunnel_nic.c-11-\nnet/ipv4/udp_tunnel_nic.c:12:enum udp_tunnel_nic_table_entry_flags {\nnet/ipv4/udp_tunnel_nic.c-13-\tUDP_TUNNEL_NIC_ENTRY_ADD\t= BIT(0),\n--\nnet/ipv4/udp_tunnel_nic.c-18-\nnet/ipv4/udp_tunnel_nic.c:19:struct udp_tunnel_nic_table_entry {\nnet/ipv4/udp_tunnel_nic.c-20-\t__be16 port;\n"
} |
| 35/2 | 2026/07/25 13:56 | llm | patch-evaluator |
5mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 35414 output: 69 thoughts: 10 Thoughts: Okay, here's my interpretation of that thought process, tailored for an expert audience: **Analyzing Potential Scope Creep in Function Visibility** Alright, so I'm thinking about function visibility. It's time to examine the codebase and pinpoint functions that *aren't* declared as `static`. The whole point is to quickly identify any potential scope creep – functions unintentionally exposed to parts of the program that shouldn't be interacting with them. We want to tighten up encapsulation where possible. A quick `grep` for functions not declared as `static` should give me a good starting point. This will allow me to assess the true intended accessibility of these functions and, if necessary, adjust the declarations to be more restrictive. This systematic scan lets me ensure proper program structure and design. I could also use this as an opportunity to review the logic of the code blocks these functions reside in. |
| 36/2 | 2026/07/25 14:02 | tool | grepper |
0mError:no matches Args: {
"Expression": "^[a-zA-Z_][a-zA-Z0-9_]* [a-zA-Z_][a-zA-Z0-9_]*\\(",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"error": "no matches"
} |
| 37/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 35689 output: 57 thoughts: 27 Thoughts: Here's my attempt at summarizing the thought process, tailored for an expert audience: **Debugging My Pattern-Matching Approach** Okay, hold on a second... this regex I've been crafting for this particular parsing task is looking a little fragile. I'm starting to overthink the edge cases. It's becoming more complex than it needs to be, and I can feel a potential bug lurking in there. Instead of wrestling with this intricate pattern, let's step back and consider a simpler, more robust approach, at least for a first pass. I can quickly grep the relevant files and search for the beginning of lines containing only the most common data types with simple strings, such as `^void `, `^int `, or `^struct `. This simplifies things considerably. This approach might not capture *everything* immediately, and it might have some false positives, but it'll be orders of magnitude faster to implement and test. I can always refine the filtering logic later once I've got a baseline. The objective is to get the process running quickly and effectively. |
| 38/2 | 2026/07/25 14:02 | tool | grepper |
0mError:no matches Args: {
"Expression": "^(void|int|struct [a-zA-Z_]+ \\*) [a-zA-Z_]+\\(",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"error": "no matches"
} |
| 39/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 36010 output: 33 thoughts: 14 Thoughts: Okay, here's my interpretation of that thought process, tailored for an expert audience:
**Grasping at a Solution: The "grep" Instinct Kicks In**
Alright, I see a problem, and my immediate reaction is, let's reach for the familiar tools. I'm thinking, "Okay, what's the quickest, dirtiest way to tackle this?" That `grep` is practically an extension of my brain at this point. The pattern `^{` is probably targeting a specific code structure, likely JSON, YAML or maybe even a configuration file. I suspect I need to find something that is preceded by a curly brace. My mind is already racing:
"I need to grab something with context". The mental model is likely structured. There is something, perhaps a nested object, that starts with a curly brace. This is my base of operations. "Let's use `grep` with some context". The thought "Let's just" means I don't need a highly sophisticated or efficient pattern. This is a quick and dirty way to identify this. I might need more advanced techniques later, but for now, this is where I'm starting. This is the first diagnostic step. I'm looking for a quick win to understand the layout of something. I'm leaning heavily on what I know about `grep` and its capabilities; I'm betting that this is a manageable problem I can address this way.
|
| 40/2 | 2026/07/25 14:02 | tool | grepper |
0mError:bad expression: fatal: -e option, '^{': Invalid preceding regular expressionArgs: {
"Expression": "^{",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"error": "bad expression: fatal: -e option, '^{': Invalid preceding regular expression"
} |
| 41/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 36385 output: 34 thoughts: 16 Thoughts: Okay, here's my summary, presented as a stream of thought:
**Correcting Invalid Syntax**
Alright, looking at this expression... *hmm*, it seems like there's an error. The current syntax, `^{`, is clearly invalid. The parser is going to choke on that, no question. I immediately recognize the problem; the opening curly brace needs to be escaped. Let's fix this. I need to make the change to `^\{`. That should resolve the issue and keep things syntactically sound. That should address that issue.
|
| 42/2 | 2026/07/25 14:02 | tool | grepper |
0mArgs:{
"Expression": "^\\{",
"PathPrefix": "net/ipv4/udp_tunnel_nic.c"
}Results: {
"Output": "net/ipv4/udp_tunnel_nic.c=59=static const char *udp_tunnel_nic_tunnel_type_name(unsigned int type)\nnet/ipv4/udp_tunnel_nic.c:60:{\nnet/ipv4/udp_tunnel_nic.c-61-\tswitch (type) {\n--\nnet/ipv4/udp_tunnel_nic.c=74=udp_tunnel_nic_entry_is_free(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c:75:{\nnet/ipv4/udp_tunnel_nic.c-76-\treturn entry-\u003euse_cnt == 0 \u0026\u0026 !entry-\u003eflags;\n--\nnet/ipv4/udp_tunnel_nic.c=80=udp_tunnel_nic_entry_is_present(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c:81:{\nnet/ipv4/udp_tunnel_nic.c-82-\treturn entry-\u003euse_cnt \u0026\u0026 !(entry-\u003eflags \u0026 ~UDP_TUNNEL_NIC_ENTRY_FROZEN);\n--\nnet/ipv4/udp_tunnel_nic.c=86=udp_tunnel_nic_entry_is_frozen(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c:87:{\nnet/ipv4/udp_tunnel_nic.c-88-\treturn entry-\u003eflags \u0026 UDP_TUNNEL_NIC_ENTRY_FROZEN;\n--\nnet/ipv4/udp_tunnel_nic.c=92=udp_tunnel_nic_entry_freeze_used(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c:93:{\nnet/ipv4/udp_tunnel_nic.c-94-\tif (!udp_tunnel_nic_entry_is_free(entry))\n--\nnet/ipv4/udp_tunnel_nic.c=99=udp_tunnel_nic_entry_unfreeze(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c:100:{\nnet/ipv4/udp_tunnel_nic.c-101-\tentry-\u003eflags \u0026= ~UDP_TUNNEL_NIC_ENTRY_FROZEN;\n--\nnet/ipv4/udp_tunnel_nic.c=105=udp_tunnel_nic_entry_is_queued(struct udp_tunnel_nic_table_entry *entry)\nnet/ipv4/udp_tunnel_nic.c:106:{\nnet/ipv4/udp_tunnel_nic.c-107-\treturn entry-\u003eflags \u0026 (UDP_TUNNEL_NIC_ENTRY_ADD |\n--\nnet/ipv4/udp_tunnel_nic.c=112=udp_tunnel_nic_entry_queue(struct udp_tunnel_nic *utn,\n--\nnet/ipv4/udp_tunnel_nic.c-114-\t\t\t unsigned int flag)\nnet/ipv4/udp_tunnel_nic.c:115:{\nnet/ipv4/udp_tunnel_nic.c-116-\tentry-\u003eflags |= flag;\n--\nnet/ipv4/udp_tunnel_nic.c=121=udp_tunnel_nic_ti_from_entry(struct udp_tunnel_nic_table_entry *entry,\nnet/ipv4/udp_tunnel_nic.c-122-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:123:{\nnet/ipv4/udp_tunnel_nic.c-124-\tmemset(ti, 0, sizeof(*ti));\n--\nnet/ipv4/udp_tunnel_nic.c=131=udp_tunnel_nic_is_empty(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:132:{\nnet/ipv4/udp_tunnel_nic.c-133-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=144=udp_tunnel_nic_should_replay(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:145:{\nnet/ipv4/udp_tunnel_nic.c-146-\tconst struct udp_tunnel_nic_table_info *table;\n--\nnet/ipv4/udp_tunnel_nic.c=166=__udp_tunnel_nic_get_port(struct net_device *dev, unsigned int table,\nnet/ipv4/udp_tunnel_nic.c-167-\t\t\t unsigned int idx, struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:168:{\nnet/ipv4/udp_tunnel_nic.c-169-\tstruct udp_tunnel_nic_table_entry *entry;\n--\nnet/ipv4/udp_tunnel_nic.c=180=__udp_tunnel_nic_set_port_priv(struct net_device *dev, unsigned int table,\nnet/ipv4/udp_tunnel_nic.c-181-\t\t\t unsigned int idx, u8 priv)\nnet/ipv4/udp_tunnel_nic.c:182:{\nnet/ipv4/udp_tunnel_nic.c-183-\tdev-\u003eudp_tunnel_nic-\u003eentries[table][idx].hw_priv = priv;\n--\nnet/ipv4/udp_tunnel_nic.c=187=udp_tunnel_nic_entry_update_done(struct udp_tunnel_nic_table_entry *entry,\nnet/ipv4/udp_tunnel_nic.c-188-\t\t\t\t int err)\nnet/ipv4/udp_tunnel_nic.c:189:{\nnet/ipv4/udp_tunnel_nic.c-190-\tbool dodgy = entry-\u003eflags \u0026 UDP_TUNNEL_NIC_ENTRY_OP_FAIL;\n--\nnet/ipv4/udp_tunnel_nic.c=210=udp_tunnel_nic_device_sync_one(struct net_device *dev,\n--\nnet/ipv4/udp_tunnel_nic.c-212-\t\t\t unsigned int table, unsigned int idx)\nnet/ipv4/udp_tunnel_nic.c:213:{\nnet/ipv4/udp_tunnel_nic.c-214-\tstruct udp_tunnel_nic_table_entry *entry;\n--\nnet/ipv4/udp_tunnel_nic.c=239=udp_tunnel_nic_device_sync_by_port(struct net_device *dev,\nnet/ipv4/udp_tunnel_nic.c-240-\t\t\t\t struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:241:{\nnet/ipv4/udp_tunnel_nic.c-242-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=251=udp_tunnel_nic_device_sync_by_table(struct net_device *dev,\nnet/ipv4/udp_tunnel_nic.c-252-\t\t\t\t struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:253:{\nnet/ipv4/udp_tunnel_nic.c-254-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=282=__udp_tunnel_nic_device_sync(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:283:{\nnet/ipv4/udp_tunnel_nic.c-284-\tif (!utn-\u003eneed_sync)\n--\nnet/ipv4/udp_tunnel_nic.c=300=udp_tunnel_nic_device_sync(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:301:{\nnet/ipv4/udp_tunnel_nic.c-302-\tif (!utn-\u003eneed_sync)\n--\nnet/ipv4/udp_tunnel_nic.c=309=udp_tunnel_nic_table_is_capable(const struct udp_tunnel_nic_table_info *table,\nnet/ipv4/udp_tunnel_nic.c-310-\t\t\t\tstruct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:311:{\nnet/ipv4/udp_tunnel_nic.c-312-\treturn table-\u003etunnel_types \u0026 ti-\u003etype;\n--\nnet/ipv4/udp_tunnel_nic.c=316=udp_tunnel_nic_is_capable(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-317-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:318:{\nnet/ipv4/udp_tunnel_nic.c-319-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=334=udp_tunnel_nic_has_collision(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-335-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:336:{\nnet/ipv4/udp_tunnel_nic.c-337-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=356=udp_tunnel_nic_entry_adj(struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-357-\t\t\t unsigned int table, unsigned int idx, int use_cnt_adj)\nnet/ipv4/udp_tunnel_nic.c:358:{\nnet/ipv4/udp_tunnel_nic.c-359-\tstruct udp_tunnel_nic_table_entry *entry = \u0026utn-\u003eentries[table][idx];\n--\nnet/ipv4/udp_tunnel_nic.c=394=udp_tunnel_nic_entry_try_adj(struct udp_tunnel_nic *utn,\n--\nnet/ipv4/udp_tunnel_nic.c-396-\t\t\t struct udp_tunnel_info *ti, int use_cnt_adj)\nnet/ipv4/udp_tunnel_nic.c:397:{\nnet/ipv4/udp_tunnel_nic.c-398-\tstruct udp_tunnel_nic_table_entry *entry = \u0026utn-\u003eentries[table][idx];\n--\nnet/ipv4/udp_tunnel_nic.c=418=udp_tunnel_nic_try_existing(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-419-\t\t\t struct udp_tunnel_info *ti, int use_cnt_adj)\nnet/ipv4/udp_tunnel_nic.c:420:{\nnet/ipv4/udp_tunnel_nic.c-421-\tconst struct udp_tunnel_nic_table_info *table;\n--\nnet/ipv4/udp_tunnel_nic.c=439=udp_tunnel_nic_add_existing(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-440-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:441:{\nnet/ipv4/udp_tunnel_nic.c-442-\treturn udp_tunnel_nic_try_existing(dev, utn, ti, +1);\n--\nnet/ipv4/udp_tunnel_nic.c=446=udp_tunnel_nic_del_existing(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-447-\t\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:448:{\nnet/ipv4/udp_tunnel_nic.c-449-\treturn udp_tunnel_nic_try_existing(dev, utn, ti, -1);\n--\nnet/ipv4/udp_tunnel_nic.c=453=udp_tunnel_nic_add_new(struct net_device *dev, struct udp_tunnel_nic *utn,\nnet/ipv4/udp_tunnel_nic.c-454-\t\t struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:455:{\nnet/ipv4/udp_tunnel_nic.c-456-\tconst struct udp_tunnel_nic_table_info *table;\n--\nnet/ipv4/udp_tunnel_nic.c=490=__udp_tunnel_nic_add_port(struct net_device *dev, struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:491:{\nnet/ipv4/udp_tunnel_nic.c-492-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=524=__udp_tunnel_nic_del_port(struct net_device *dev, struct udp_tunnel_info *ti)\nnet/ipv4/udp_tunnel_nic.c:525:{\nnet/ipv4/udp_tunnel_nic.c-526-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c=540=static void __udp_tunnel_nic_reset_ntf(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c:541:{\nnet/ipv4/udp_tunnel_nic.c-542-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=576=__udp_tunnel_nic_dump_size(struct net_device *dev, unsigned int table)\nnet/ipv4/udp_tunnel_nic.c:577:{\nnet/ipv4/udp_tunnel_nic.c-578-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=601=__udp_tunnel_nic_dump_write(struct net_device *dev, unsigned int table,\nnet/ipv4/udp_tunnel_nic.c-602-\t\t\t struct sk_buff *skb)\nnet/ipv4/udp_tunnel_nic.c:603:{\nnet/ipv4/udp_tunnel_nic.c-604-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=637=static void __udp_tunnel_nic_assert_locked(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c:638:{\nnet/ipv4/udp_tunnel_nic.c-639-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c=646=static void __udp_tunnel_nic_lock(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c:647:{\nnet/ipv4/udp_tunnel_nic.c-648-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c=655=static void __udp_tunnel_nic_unlock(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c:656:{\nnet/ipv4/udp_tunnel_nic.c-657-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c=678=udp_tunnel_nic_flush(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:679:{\nnet/ipv4/udp_tunnel_nic.c-680-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=701=udp_tunnel_nic_replay(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:702:{\nnet/ipv4/udp_tunnel_nic.c-703-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=728=static void udp_tunnel_nic_device_sync_work(struct work_struct *work)\nnet/ipv4/udp_tunnel_nic.c:729:{\nnet/ipv4/udp_tunnel_nic.c-730-\tstruct udp_tunnel_nic *utn =\n--\nnet/ipv4/udp_tunnel_nic.c=752=udp_tunnel_nic_alloc(const struct udp_tunnel_nic_info *info,\nnet/ipv4/udp_tunnel_nic.c-753-\t\t unsigned int n_tables)\nnet/ipv4/udp_tunnel_nic.c:754:{\nnet/ipv4/udp_tunnel_nic.c-755-\tstruct udp_tunnel_nic *utn;\n--\nnet/ipv4/udp_tunnel_nic.c=781=static void udp_tunnel_nic_free(struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:782:{\nnet/ipv4/udp_tunnel_nic.c-783-\tunsigned int i;\n--\nnet/ipv4/udp_tunnel_nic.c=790=static int udp_tunnel_nic_register(struct net_device *dev)\nnet/ipv4/udp_tunnel_nic.c:791:{\nnet/ipv4/udp_tunnel_nic.c-792-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=865=udp_tunnel_nic_unregister(struct net_device *dev, struct udp_tunnel_nic *utn)\nnet/ipv4/udp_tunnel_nic.c:866:{\nnet/ipv4/udp_tunnel_nic.c-867-\tconst struct udp_tunnel_nic_info *info = dev-\u003eudp_tunnel_nic_info;\n--\nnet/ipv4/udp_tunnel_nic.c=919=udp_tunnel_nic_netdevice_event(struct notifier_block *unused,\nnet/ipv4/udp_tunnel_nic.c-920-\t\t\t unsigned long event, void *ptr)\nnet/ipv4/udp_tunnel_nic.c:921:{\nnet/ipv4/udp_tunnel_nic.c-922-\tstruct net_device *dev = netdev_notifier_info_to_dev(ptr);\n--\nnet/ipv4/udp_tunnel_nic.c=973=static int __init udp_tunnel_nic_init_module(void)\nnet/ipv4/udp_tunnel_nic.c:974:{\nnet/ipv4/udp_tunnel_nic.c-975-\tint err;\n--\nnet/ipv4/udp_tunnel_nic.c=1000=static void __exit udp_tunnel_nic_cleanup_module(void)\nnet/ipv4/udp_tunnel_nic.c:1001:{\nnet/ipv4/udp_tunnel_nic.c-1002-\tunregister_netdevice_notifier(\u0026udp_tunnel_nic_notifier_block);\n"
} |
| 43/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 41574 output: 35 thoughts: 637 Thoughts: **My Analysis of the UDP Tunnel NIC Synchronization Patch**
Alright, let's break this down. From what I'm seeing in `net/ipv4/udp_tunnel_nic.c`, the core functions of interest are static, which immediately flags a potential issue for symbol visibility. My initial thought is that most of them won't be exposed as symbols. But wait, some of them are clearly used in ways that prevent inlining. Specifically, the addresses of `udp_tunnel_nic_device_sync_work` (used with `INIT_DELAYED_WORK`), `udp_tunnel_nic_netdevice_event` (used with `notifier_block`), `__udp_tunnel_nic_add_port` and `__udp_tunnel_nic_del_port` (passed into `udp_tunnel_nic_ops`). Those should be good targets.
Okay, let's confirm the static nature of `udp_tunnel_nic_device_sync_work`, yep, it's static, but that's fine since we take its address, so it must be a valid symbol for fuzzing. Now, what about `udp_tunnel_nic_unregister`? Hmm, it's called directly from `udp_tunnel_nic_netdevice_event`. Likely inlined, so maybe not the best symbol. `udp_tunnel_nic_netdevice_event` looks like a more promising candidate since it's used with `notifier_block`.
So, the summary of my thinking is: this patch fundamentally alters the synchronization method in UDP tunnel NIC offloading, switching to a delayed workqueue and refining the locking mechanism with `rtnl_trylock()` and a requeue delay to deal with potential deadlocks during device unregistration. This is core networking functionality, and it's reachable through emulated devices like netdevsim. Definitely worth fuzzing to catch any newly introduced race conditions or deadlocks.
Here's my distilled list:
* **WorthFuzzing:** True
* **Reasoning:** Changes to core networking synchronization logic and locking, potentially impacting race conditions and deadlocks, reachable via emulated devices.
* **FocusSymbols:**
* `udp_tunnel_nic_device_sync_work`
* `udp_tunnel_nic_netdevice_event`
* `__udp_tunnel_nic_add_port`
* `__udp_tunnel_nic_del_port`
* **EnableConfigs:**
* `NET_UDP_TUNNEL` (explicitly listed, but selected by `VXLAN` or `GENEVE`)
* `VXLAN`
* `GENEVE`
* `NETDEVSIM`
And let's quickly double-check that `NETDEVSIM` doesn't depend on other specific configurations, just in case.
|
| 44/2 | 2026/07/25 14:02 | tool | grepper |
0mError:no matches Args: {
"Expression": "config NETDEVSIM",
"PathPrefix": "drivers/net/netdevsim/Kconfig"
}Results: {
"error": "no matches"
} |
| 45/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 42880 output: 34 thoughts: 25 Thoughts: Here's my thought process, summarized as you requested: **Kconfig Check for NETDEVSIM** Okay, before I go any further, I need to make absolutely sure I'm not missing something obvious. I'll quickly check the `drivers/net/netdevsim/Kconfig` file. I need to confirm the definition and dependencies related to `NETDEVSIM`. It's possible I'm overlooking something fundamental about how the feature is enabled or configured, or if there is any other related config I have to enable alongside. Double-checking `Kconfig` is a crucial step to avoid wasting time on issues that are already addressed in the project build configuration. It's a fundamental part of the sanity check for something like this and always worth a second glance. |
| 46/2 | 2026/07/25 14:02 | tool | grepper |
0mError:no matches Args: {
"Expression": "NETDEVSIM",
"PathPrefix": "drivers/net/netdevsim/Kconfig"
}Results: {
"error": "no matches"
} |
| 47/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 43117 output: 29 thoughts: 11 Thoughts: Here's my thought process, as if I were considering this query: **Where's the `netdevsim` Magic?** Okay, first things first, I need to get my bearings. I see "netdevsim" and my brain immediately goes, "Define that thing!" It's that initial reaction to encountering an unfamiliar term, especially one that sounds like it could be crucial. I mean, if this is central to something, I *need* to know where it's rooted. Is it a module I need to import? A function call? A library dependency? Is it something I've somehow missed, despite my experience? This absence of context is making me feel like I'm missing a key piece of the puzzle. I can't really analyze this further until I know exactly what `netdevsim` actually *is*. |
| 48/2 | 2026/07/25 14:02 | tool | grepper |
0mArgs:{
"Expression": "config NETDEVSIM",
"PathPrefix": "drivers/net/"
}Results: {
"Output": "drivers/net/Kconfig=602=source \"drivers/net/hyperv/Kconfig\"\ndrivers/net/Kconfig-603-\ndrivers/net/Kconfig:604:config NETDEVSIM\ndrivers/net/Kconfig-605-\ttristate \"Simulated networking device\"\n"
} |
| 49/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 43422 output: 31 thoughts: 14 Thoughts: Okay, here's my summary, tailored as requested: **Kconfig Location Found** Alright, let me see... I was just tracing that configuration option, trying to remember where I saw it defined. Bingo! After a quick search, it's right there, precisely where I suspected: `drivers/net/Kconfig`. That makes perfect sense; the networking drivers are usually all organized in that area. Now I can dive into the specifics of *that* Kconfig file and figure out what other dependencies or defaults are tied to that option. Knowing this path saves time, and lets me move on to the more interesting part: deciphering the relationships and implications of this setting. |
| 50/2 | 2026/07/25 14:02 | tool | grepper |
0mArgs:{
"Expression": "config NETDEVSIM",
"PathPrefix": "drivers/net/Kconfig"
}Results: {
"Output": "drivers/net/Kconfig=602=source \"drivers/net/hyperv/Kconfig\"\ndrivers/net/Kconfig-603-\ndrivers/net/Kconfig:604:config NETDEVSIM\ndrivers/net/Kconfig-605-\ttristate \"Simulated networking device\"\n"
} |
| 51/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 43695 output: 30 thoughts: 7 Thoughts: Okay, here's my attempt at summarizing the thought process, tailored for an expert audience, and written in the first person: **Analyzing the Dependencies** Alright, let's get down to brass tacks. My initial assessment is incomplete; I need to understand the underlying structure. Let me see... I need to start by tracing the dependencies. It's crucial to identify the interconnected elements. I'm thinking, "What are the core building blocks? What relies on what?" Without fully grasping the relationships between these elements, I can't accurately assess the larger system. I'm going to dig into the relationships, understand how a change in one area will trickle through. This is the starting point, of course, but it is critical. |
| 52/2 | 2026/07/25 14:02 | tool | grepper |
0mArgs:{
"Expression": "NETDEVSIM",
"PathPrefix": "drivers/net/Kconfig"
}Results: {
"Output": "drivers/net/Kconfig=602=source \"drivers/net/hyperv/Kconfig\"\ndrivers/net/Kconfig-603-\ndrivers/net/Kconfig:604:config NETDEVSIM\ndrivers/net/Kconfig-605-\ttristate \"Simulated networking device\"\n"
} |
| 53/2 | 2026/07/25 14:02 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 43974 output: 34 thoughts: 14 Thoughts: Okay, here's my interpretation of that thought process, assuming I'm an expert in network simulation or related fields: **Analyzing the Configuration Directive** Alright, the directive `config NETDEVSIM` just popped up. My immediate thought is, "Okay, we're in configuration mode, likely within a network simulation environment or a system that utilizes a network device simulation component." This is probably some kind of initialization or setup command. I'm going to want to understand what parameters or settings are being defined here, or if this is just an entry point to further configurations. I'm expecting this to dictate the overall behavior of some simulated network device, or the environment for it. The lines following this are going to be critical to understanding the specific configuration that's being implemented. So, let's dive into those lines to see what they reveal about the configuration. |
| 54/2 | 2026/07/25 14:03 | tool | read-file |
0mArgs:{
"File": "drivers/net/Kconfig",
"FirstLine": 604,
"LineCount": 10
}Results: {
"Contents": " 604:\tconfig NETDEVSIM\n 605:\t\ttristate \"Simulated networking device\"\n 606:\t\tdepends on DEBUG_FS\n 607:\t\tdepends on INET\n 608:\t\tdepends on PSAMPLE || PSAMPLE=n\n 609:\t\tdepends on PTP_1588_CLOCK_MOCK || PTP_1588_CLOCK_MOCK=n\n 610:\t\tselect NET_DEVLINK\n 611:\t\tselect PAGE_POOL\n 612:\t\tselect NET_SHAPER\n 613:\t\thelp\n"
} |
| 55/2 | 2026/07/25 14:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 44362 output: 34 thoughts: 50 Thoughts: **Assessing NETDEVSIM and VXLAN Dependencies** Okay, so I'm thinking about `NETDEVSIM` and how robust it is. The dependence on `DEBUG_FS` and `INET` is straightforward. Considering `DEBUG_FS` is generally enabled on most systems I work with, that aspect of `NETDEVSIM` looks solid and shouldn't present an issue. It's a fairly safe assumption. Now, let's pivot and take a look at the dependencies for `VXLAN`. That will need a bit more investigation, as it's a critical technology and understanding all its components is paramount. |
| 56/2 | 2026/07/25 14:03 | tool | read-file |
0mArgs:{
"File": "drivers/net/Kconfig",
"FirstLine": 230,
"LineCount": 10
}Results: {
"Contents": " 230:\tconfig VXLAN\n 231:\t\ttristate \"Virtual eXtensible Local Area Network (VXLAN)\"\n 232:\t\tdepends on INET\n 233:\t\tselect NET_UDP_TUNNEL\n 234:\t\tselect GRO_CELLS\n 235:\t\thelp\n 236:\t\t This allows one to create vxlan virtual interfaces that provide\n 237:\t\t Layer 2 Networks over Layer 3 Networks. VXLAN is often used\n 238:\t\t to tunnel virtual network infrastructure in virtualized environments.\n 239:\t\t For more information see:\n"
} |
| 57/2 | 2026/07/25 14:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 44743 output: 34 thoughts: 21 Thoughts: Here's my summary, as I see it: **VXLAN and the Path Forward** Okay, so I'm thinking about network virtualization. Right off the bat, I know VXLAN relies on the underlying INET infrastructure. No surprises there. But I need a broader view of the landscape. My next thought is to dig into GENEVE. I should check what dependencies *that* protocol has, see if it is a more viable option. |
| 58/2 | 2026/07/25 14:03 | tool | read-file |
0mArgs:{
"File": "drivers/net/Kconfig",
"FirstLine": 245,
"LineCount": 10
}Results: {
"Contents": " 245:\tconfig GENEVE\n 246:\t\ttristate \"Generic Network Virtualization Encapsulation\"\n 247:\t\tdepends on INET\n 248:\t\tselect NET_UDP_TUNNEL\n 249:\t\tselect GRO_CELLS\n 250:\t\thelp\n 251:\t\t This allows one to create geneve virtual interfaces that provide\n 252:\t\t Layer 2 Networks over Layer 3 Networks. GENEVE is often used\n 253:\t\t to tunnel virtual network infrastructure in virtualized environments.\n 254:\t\t For more information see:\n"
} |
| 59/2 | 2026/07/25 14:03 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 45055 output: 202 thoughts: 395 Thoughts: **My Analysis of the `GENEVE` Configuration and Related Code** Okay, so I'm breaking down this `GENEVE` setup. It's built on `INET`, that's the foundation. And because of that, I can see the configuration involves `NETDEVSIM`, `VXLAN`, and `GENEVE` themselves. A quick reminder is useful, `NET_UDP_TUNNEL` is selected by both `VXLAN` and `GENEVE`, so, even though I don't technically *need* to list it, it's worth keeping in mind. Now, let's look at those focus symbols again, just to make sure I'm on the right track: `udp_tunnel_nic_device_sync_work`, `udp_tunnel_nic_netdevice_event`, `__udp_tunnel_nic_add_port`, and `__udp_tunnel_nic_del_port`. Hmm, any other functions got tweaked? Ah, yes. `udp_tunnel_nic_alloc` is modified to use `INIT_DELAYED_WORK`. Also, `udp_tunnel_nic_unregister` has been updated to use `cancel_delayed_work_sync`. `udp_tunnel_nic_device_sync` now uses `queue_delayed_work`, and the internal function `__udp_tunnel_nic_device_sync` is changed to skip the check for `utn->work_pending`. Since `udp_tunnel_nic_alloc` is called by `udp_tunnel_nic_register`, which is in turn called by `udp_tunnel_nic_netdevice_event`, a focus on fuzzing `udp_tunnel_nic_netdevice_event` will effectively cover that function. And `udp_tunnel_nic_unregister` is *also* called by `udp_tunnel_nic_netdevice_event`. `udp_tunnel_nic_device_sync` is directly called by `__udp_tunnel_nic_add_port` and `__udp_tunnel_nic_del_port`. Yeah, that makes sense. Considering how the functions are called, and the modifications to them, my chosen focus symbols should cover all the relevant modified code paths. I'm satisfied with this. |
| 60/2 | 2026/07/25 14:03 | tool | set-results |
0mArgs:{
"EnableConfigs": [
"NETDEVSIM",
"VXLAN",
"GENEVE",
"NET_UDP_TUNNEL"
],
"FocusSymbols": [
"udp_tunnel_nic_device_sync_work",
"udp_tunnel_nic_netdevice_event",
"__udp_tunnel_nic_add_port",
"__udp_tunnel_nic_del_port"
],
"Reasoning": "The patch changes the synchronization mechanism for UDP tunnel NIC offloading from a regular workqueue to a delayed workqueue, and modifies the locking in the work handler to use rtnl_trylock() with a requeue delay to prevent deadlocks during device unregistration. This is a functional change in core networking logic that is reachable via emulated devices (like netdevsim) and should be fuzzed to ensure no new races or deadlocks are introduced.",
"WorthFuzzing": true
}Results: {
"EnableConfigs": [
"NETDEVSIM",
"VXLAN",
"GENEVE",
"NET_UDP_TUNNEL"
],
"FocusSymbols": [
"udp_tunnel_nic_device_sync_work",
"udp_tunnel_nic_netdevice_event",
"__udp_tunnel_nic_add_port",
"__udp_tunnel_nic_del_port"
],
"Reasoning": "The patch changes the synchronization mechanism for UDP tunnel NIC offloading from a regular workqueue to a delayed workqueue, and modifies the locking in the work handler to use rtnl_trylock() with a requeue delay to prevent deadlocks during device unregistration. This is a functional change in core networking logic that is reachable via emulated devices (like netdevsim) and should be fuzzed to ensure no new races or deadlocks are introduced.",
"WorthFuzzing": true
} |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|