| Seq | Timestamp | Type | Name | Duration |
|---|---|---|---|---|
| 0/0 | 2026/08/18 06:33 | flow | patch-triage |
15mArgs:null Results: {
"EnableConfigs": [
"NVME_TCP",
"NVME_TARGET",
"NVME_TARGET_TCP"
],
"FocusSymbols": [
"nvme_tcp_create_ctrl",
"nvmet_tcp_add_port",
"nvmet_tcp_accept_work"
],
"KMSANReasoning": "The patch refactors socket option setting in the NVMe TCP host and target drivers by replacing direct calls to specific helpers (like `tcp_sock_set_nodelay`, `sock_no_linger`, etc.) with local wrapper functions that call `do_sock_setsockopt`. All local variables and structures passed to `do_sock_setsockopt` (e.g., `int val = 1;`, `struct linger ling = { .l_onoff = 1, .l_linger = 0 };`, or function arguments passed by value) are fully initialized before use. There are no uninitialized fields, no complex data structures with uninitialized padding, and no kernel-to-user info-leaks introduced by these changes. Any potential bugs introduced would be related to incorrect socket options or error handling, which are not uninitialized memory issues and do not require KMSAN. Standard testing and KASAN are sufficient.",
"NeedsKMSAN": false,
"Reasoning": "The patch replaces direct socket option assignments (e.g., tcp_sock_set_syncnt, sock_no_linger) with do_sock_setsockopt() in the NVMe TCP host and target drivers. This is a functional change because do_sock_setsockopt() invokes LSM and BPF cgroup hooks, allowing security modules and BPF programs to intercept, modify, or deny these socket options. It also adds error handling that fails queue allocation if setting the options fails. These changes affect the reachable connection setup paths in NVMe over TCP and should be fuzzed.",
"WorthFuzzing": true
} |
| 1/1 | 2026/08/18 06:33 | action | read-patch-diff |
0mArgs:null Results: {
"PatchDiff": "commit 75340f23186bf32c934b75b65e5d0af4043c0218\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Tue Aug 18 06:33:09 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c\nindex ba5c7b3e2a7c6..5f30be04a9dde 100644\n--- a/drivers/nvme/host/tcp.c\n+++ b/drivers/nvme/host/tcp.c\n@@ -1774,6 +1774,58 @@ static int nvme_tcp_start_tls(struct nvme_ctrl *nctrl,\n \treturn ret;\n }\n \n+static int nvme_tcp_sock_no_linger(struct sock *sk)\n+{\n+\tstruct linger ling = { .l_onoff = 1, .l_linger = 0 };\n+\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET, SO_LINGER,\n+\t\t\t\t KERNEL_SOCKPTR(\u0026ling), sizeof(ling));\n+}\n+\n+static int nvme_tcp_sock_set_priority(struct sock *sk, u32 priority)\n+{\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET, SO_PRIORITY,\n+\t\t\t\t KERNEL_SOCKPTR(\u0026priority), sizeof(priority));\n+}\n+\n+static int nvme_tcp_sock_set_bindtodevice(struct sock *sk, char *iface)\n+{\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET,\n+\t\t\t\t SO_BINDTODEVICE, KERNEL_SOCKPTR(iface),\n+\t\t\t\t strlen(iface));\n+}\n+\n+static int nvme_tcp_sock_set_nodelay(struct sock *sk)\n+{\n+\tint val = 1;\n+\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_TCP, TCP_NODELAY,\n+\t\t\t\t KERNEL_SOCKPTR(\u0026val), sizeof(val));\n+}\n+\n+static int nvme_tcp_sock_set_syncnt(struct sock *sk, int val)\n+{\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_TCP, TCP_SYNCNT,\n+\t\t\t\t KERNEL_SOCKPTR(\u0026val), sizeof(val));\n+}\n+\n+static int nvme_tcp_sock_set_tos(struct sock *sk, int tos)\n+{\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_IP, IP_TOS,\n+\t\t\t\t KERNEL_SOCKPTR(\u0026tos), sizeof(tos));\n+}\n+\n+static int nvme_tcp_sock_set_tclass(struct sock *sk, int tclass)\n+{\n+#if IS_ENABLED(CONFIG_IPV6)\n+\tif (sk-\u003esk_family == AF_INET6)\n+\t\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_IPV6,\n+\t\t\t\t\t IPV6_TCLASS, KERNEL_SOCKPTR(\u0026tclass),\n+\t\t\t\t\t sizeof(tclass));\n+#endif\n+\treturn 0;\n+}\n+\n static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,\n \t\t\t\tkey_serial_t pskid)\n {\n@@ -1819,24 +1871,65 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,\n #endif\n \n \t/* Single syn retry */\n-\ttcp_sock_set_syncnt(queue-\u003esock-\u003esk, 1);\n+\tret = nvme_tcp_sock_set_syncnt(queue-\u003esock-\u003esk, 1);\n+\tif (ret) {\n+\t\tdev_err(nctrl-\u003edevice,\n+\t\t\t\"failed to set TCP_SYNCNT on queue %d err %d\\n\",\n+\t\t\tqid, ret);\n+\t\tgoto err_sock;\n+\t}\n \n \t/* Set TCP no delay */\n-\ttcp_sock_set_nodelay(queue-\u003esock-\u003esk);\n+\tret = nvme_tcp_sock_set_nodelay(queue-\u003esock-\u003esk);\n+\tif (ret) {\n+\t\tdev_err(nctrl-\u003edevice,\n+\t\t\t\"failed to set TCP_NODELAY on queue %d err %d\\n\",\n+\t\t\tqid, ret);\n+\t\tgoto err_sock;\n+\t}\n \n \t/*\n \t * Cleanup whatever is sitting in the TCP transmit queue on socket\n \t * close. This is done to prevent stale data from being sent should\n \t * the network connection be restored before TCP times out.\n \t */\n-\tsock_no_linger(queue-\u003esock-\u003esk);\n+\tret = nvme_tcp_sock_no_linger(queue-\u003esock-\u003esk);\n+\tif (ret) {\n+\t\tdev_err(nctrl-\u003edevice,\n+\t\t\t\"failed to set SO_LINGER on queue %d err %d\\n\",\n+\t\t\tqid, ret);\n+\t\tgoto err_sock;\n+\t}\n \n-\tif (so_priority \u003e 0)\n-\t\tsock_set_priority(queue-\u003esock-\u003esk, so_priority);\n+\tif (so_priority \u003e 0) {\n+\t\tret = nvme_tcp_sock_set_priority(queue-\u003esock-\u003esk, so_priority);\n+\t\tif (ret) {\n+\t\t\tdev_err(nctrl-\u003edevice,\n+\t\t\t\t\"failed to set SO_PRIORITY on queue %d err %d\\n\",\n+\t\t\t\tqid, ret);\n+\t\t\tgoto err_sock;\n+\t\t}\n+\t}\n \n \t/* Set socket type of service */\n-\tif (nctrl-\u003eopts-\u003etos \u003e= 0)\n-\t\tip_sock_set_tos(queue-\u003esock-\u003esk, nctrl-\u003eopts-\u003etos);\n+\tif (nctrl-\u003eopts-\u003etos \u003e= 0) {\n+\t\tret = nvme_tcp_sock_set_tos(queue-\u003esock-\u003esk, nctrl-\u003eopts-\u003etos);\n+\t\tif (ret) {\n+\t\t\tdev_err(nctrl-\u003edevice,\n+\t\t\t\t\"failed to set IP_TOS on queue %d err %d\\n\",\n+\t\t\t\tqid, ret);\n+\t\t\tgoto err_sock;\n+\t\t}\n+\n+\t\tret = nvme_tcp_sock_set_tclass(queue-\u003esock-\u003esk,\n+\t\t\t\t\t nctrl-\u003eopts-\u003etos);\n+\t\tif (ret) {\n+\t\t\tdev_err(nctrl-\u003edevice,\n+\t\t\t\t\"failed to set IPV6_TCLASS on queue %d err %d\\n\",\n+\t\t\t\tqid, ret);\n+\t\t\tgoto err_sock;\n+\t\t}\n+\t}\n \n \t/* Set 10 seconds timeout for icresp recvmsg */\n \tqueue-\u003esock-\u003esk-\u003esk_rcvtimeo = 10 * HZ;\n@@ -1864,10 +1957,8 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,\n \n \tif (nctrl-\u003eopts-\u003emask \u0026 NVMF_OPT_HOST_IFACE) {\n \t\tchar *iface = nctrl-\u003eopts-\u003ehost_iface;\n-\t\tsockptr_t optval = KERNEL_SOCKPTR(iface);\n \n-\t\tret = sock_setsockopt(queue-\u003esock, SOL_SOCKET, SO_BINDTODEVICE,\n-\t\t\t\t optval, strlen(iface));\n+\t\tret = nvme_tcp_sock_set_bindtodevice(queue-\u003esock-\u003esk, iface);\n \t\tif (ret) {\n \t\t\tdev_err(nctrl-\u003edevice,\n \t\t\t \"failed to bind to interface %s queue %d err %d\\n\",\ndiff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c\nindex 75a276d73be3e..ed413aa5601c7 100644\n--- a/drivers/nvme/target/tcp.c\n+++ b/drivers/nvme/target/tcp.c\n@@ -1696,10 +1696,66 @@ static void nvmet_tcp_state_change(struct sock *sk)\n \tread_unlock_bh(\u0026sk-\u003esk_callback_lock);\n }\n \n+static int nvmet_tcp_sock_no_linger(struct sock *sk)\n+{\n+\tstruct linger ling = { .l_onoff = 1, .l_linger = 0 };\n+\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET, SO_LINGER,\n+\t\t\t\t KERNEL_SOCKPTR(\u0026ling), sizeof(ling));\n+}\n+\n+static int nvmet_tcp_sock_set_priority(struct sock *sk, u32 priority)\n+{\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET, SO_PRIORITY,\n+\t\t\t\t KERNEL_SOCKPTR(\u0026priority), sizeof(priority));\n+}\n+\n+static int nvmet_tcp_sock_set_reuseaddr(struct sock *sk)\n+{\n+\tint val = SK_CAN_REUSE;\n+\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET,\n+\t\t\t\t SO_REUSEADDR, KERNEL_SOCKPTR(\u0026val),\n+\t\t\t\t sizeof(val));\n+}\n+\n+static int nvmet_tcp_sock_set_nodelay(struct sock *sk)\n+{\n+\tint val = 1;\n+\n+\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_TCP, TCP_NODELAY,\n+\t\t\t\t KERNEL_SOCKPTR(\u0026val), sizeof(val));\n+}\n+\n+static int nvmet_tcp_sock_set_tos(struct sock *sk)\n+{\n+\tint tos = inet_sk(sk)-\u003ercv_tos;\n+\n+\tif (tos \u003e 0)\n+\t\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_IP, IP_TOS,\n+\t\t\t\t\t KERNEL_SOCKPTR(\u0026tos), sizeof(tos));\n+\treturn 0;\n+}\n+\n+static int nvmet_tcp_sock_set_tclass(struct sock *sk)\n+{\n+#if IS_ENABLED(CONFIG_IPV6)\n+\tif (sk-\u003esk_family == AF_INET6) {\n+\t\tint tclass = ip6_tclass(inet6_sk(sk)-\u003ercv_flowinfo);\n+\n+\t\tif (tclass \u003e 0)\n+\t\t\treturn do_sock_setsockopt(sk-\u003esk_socket, false,\n+\t\t\t\t\t\t SOL_IPV6, IPV6_TCLASS,\n+\t\t\t\t\t\t KERNEL_SOCKPTR(\u0026tclass),\n+\t\t\t\t\t\t sizeof(tclass));\n+\t}\n+#endif\n+\treturn 0;\n+}\n+\n static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)\n {\n \tstruct socket *sock = queue-\u003esock;\n-\tstruct inet_sock *inet = inet_sk(sock-\u003esk);\n \tint ret;\n \n \tret = kernel_getsockname(sock,\n@@ -1717,14 +1773,24 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)\n \t * close. This is done to prevent stale data from being sent should\n \t * the network connection be restored before TCP times out.\n \t */\n-\tsock_no_linger(sock-\u003esk);\n+\tret = nvmet_tcp_sock_no_linger(sock-\u003esk);\n+\tif (ret)\n+\t\treturn ret;\n \n-\tif (so_priority \u003e 0)\n-\t\tsock_set_priority(sock-\u003esk, so_priority);\n+\tif (so_priority \u003e 0) {\n+\t\tret = nvmet_tcp_sock_set_priority(sock-\u003esk, so_priority);\n+\t\tif (ret)\n+\t\t\treturn ret;\n+\t}\n \n \t/* Set socket type of service */\n-\tif (inet-\u003ercv_tos \u003e 0)\n-\t\tip_sock_set_tos(sock-\u003esk, inet-\u003ercv_tos);\n+\tret = nvmet_tcp_sock_set_tos(sock-\u003esk);\n+\tif (ret)\n+\t\treturn ret;\n+\n+\tret = nvmet_tcp_sock_set_tclass(sock-\u003esk);\n+\tif (ret)\n+\t\treturn ret;\n \n \tret = 0;\n \twrite_lock_bh(\u0026sock-\u003esk-\u003esk_callback_lock);\n@@ -2098,10 +2164,26 @@ static int nvmet_tcp_add_port(struct nvmet_port *nport)\n \tport-\u003esock-\u003esk-\u003esk_user_data = port;\n \tport-\u003edata_ready = port-\u003esock-\u003esk-\u003esk_data_ready;\n \tport-\u003esock-\u003esk-\u003esk_data_ready = nvmet_tcp_listen_data_ready;\n-\tsock_set_reuseaddr(port-\u003esock-\u003esk);\n-\ttcp_sock_set_nodelay(port-\u003esock-\u003esk);\n-\tif (so_priority \u003e 0)\n-\t\tsock_set_priority(port-\u003esock-\u003esk, so_priority);\n+\tret = nvmet_tcp_sock_set_reuseaddr(port-\u003esock-\u003esk);\n+\tif (ret) {\n+\t\tpr_err(\"failed to set SO_REUSEADDR on port socket %d\\n\", ret);\n+\t\tgoto err_sock;\n+\t}\n+\n+\tret = nvmet_tcp_sock_set_nodelay(port-\u003esock-\u003esk);\n+\tif (ret) {\n+\t\tpr_err(\"failed to set TCP_NODELAY on port socket %d\\n\", ret);\n+\t\tgoto err_sock;\n+\t}\n+\n+\tif (so_priority \u003e 0) {\n+\t\tret = nvmet_tcp_sock_set_priority(port-\u003esock-\u003esk, so_priority);\n+\t\tif (ret) {\n+\t\t\tpr_err(\"failed to set SO_PRIORITY on port socket %d\\n\",\n+\t\t\t ret);\n+\t\t\tgoto err_sock;\n+\t\t}\n+\t}\n \n \tret = kernel_bind(port-\u003esock, (struct sockaddr_unsized *)\u0026port-\u003eaddr,\n \t\t\tsizeof(port-\u003eaddr));\n"
} |
| 2/1 | 2026/08/18 06:33 | agent | patch-evaluator |
4mModel:best-expensive Args: null Results: {
"EnableConfigs": [
"NVME_TCP",
"NVME_TARGET",
"NVME_TARGET_TCP"
],
"FocusSymbols": [
"nvme_tcp_create_ctrl",
"nvmet_tcp_add_port",
"nvmet_tcp_accept_work"
],
"Reasoning": "The patch replaces direct socket option assignments (e.g., tcp_sock_set_syncnt, sock_no_linger) with do_sock_setsockopt() in the NVMe TCP host and target drivers. This is a functional change because do_sock_setsockopt() invokes LSM and BPF cgroup hooks, allowing security modules and BPF programs to intercept, modify, or deny these socket options. It also adds error handling that fails queue allocation if setting the options fails. These changes affect the reachable connection setup paths in NVMe over TCP and should be fuzzed.",
"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 75340f23186bf32c934b75b65e5d0af4043c0218
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Aug 18 06:33:09 2026 +0000
syz-cluster: applied patch under review
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index ba5c7b3e2a7c6..5f30be04a9dde 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1774,6 +1774,58 @@ static int nvme_tcp_start_tls(struct nvme_ctrl *nctrl,
return ret;
}
+static int nvme_tcp_sock_no_linger(struct sock *sk)
+{
+ struct linger ling = { .l_onoff = 1, .l_linger = 0 };
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET, SO_LINGER,
+ KERNEL_SOCKPTR(&ling), sizeof(ling));
+}
+
+static int nvme_tcp_sock_set_priority(struct sock *sk, u32 priority)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET, SO_PRIORITY,
+ KERNEL_SOCKPTR(&priority), sizeof(priority));
+}
+
+static int nvme_tcp_sock_set_bindtodevice(struct sock *sk, char *iface)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET,
+ SO_BINDTODEVICE, KERNEL_SOCKPTR(iface),
+ strlen(iface));
+}
+
+static int nvme_tcp_sock_set_nodelay(struct sock *sk)
+{
+ int val = 1;
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_TCP, TCP_NODELAY,
+ KERNEL_SOCKPTR(&val), sizeof(val));
+}
+
+static int nvme_tcp_sock_set_syncnt(struct sock *sk, int val)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_TCP, TCP_SYNCNT,
+ KERNEL_SOCKPTR(&val), sizeof(val));
+}
+
+static int nvme_tcp_sock_set_tos(struct sock *sk, int tos)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_IP, IP_TOS,
+ KERNEL_SOCKPTR(&tos), sizeof(tos));
+}
+
+static int nvme_tcp_sock_set_tclass(struct sock *sk, int tclass)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6)
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_IPV6,
+ IPV6_TCLASS, KERNEL_SOCKPTR(&tclass),
+ sizeof(tclass));
+#endif
+ return 0;
+}
+
static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,
key_serial_t pskid)
{
@@ -1819,24 +1871,65 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,
#endif
/* Single syn retry */
- tcp_sock_set_syncnt(queue->sock->sk, 1);
+ ret = nvme_tcp_sock_set_syncnt(queue->sock->sk, 1);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set TCP_SYNCNT on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
/* Set TCP no delay */
- tcp_sock_set_nodelay(queue->sock->sk);
+ ret = nvme_tcp_sock_set_nodelay(queue->sock->sk);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set TCP_NODELAY on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
/*
* Cleanup whatever is sitting in the TCP transmit queue on socket
* close. This is done to prevent stale data from being sent should
* the network connection be restored before TCP times out.
*/
- sock_no_linger(queue->sock->sk);
+ ret = nvme_tcp_sock_no_linger(queue->sock->sk);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set SO_LINGER on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
- if (so_priority > 0)
- sock_set_priority(queue->sock->sk, so_priority);
+ if (so_priority > 0) {
+ ret = nvme_tcp_sock_set_priority(queue->sock->sk, so_priority);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set SO_PRIORITY on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
+ }
/* Set socket type of service */
- if (nctrl->opts->tos >= 0)
- ip_sock_set_tos(queue->sock->sk, nctrl->opts->tos);
+ if (nctrl->opts->tos >= 0) {
+ ret = nvme_tcp_sock_set_tos(queue->sock->sk, nctrl->opts->tos);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set IP_TOS on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
+
+ ret = nvme_tcp_sock_set_tclass(queue->sock->sk,
+ nctrl->opts->tos);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set IPV6_TCLASS on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
+ }
/* Set 10 seconds timeout for icresp recvmsg */
queue->sock->sk->sk_rcvtimeo = 10 * HZ;
@@ -1864,10 +1957,8 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,
if (nctrl->opts->mask & NVMF_OPT_HOST_IFACE) {
char *iface = nctrl->opts->host_iface;
- sockptr_t optval = KERNEL_SOCKPTR(iface);
- ret = sock_setsockopt(queue->sock, SOL_SOCKET, SO_BINDTODEVICE,
- optval, strlen(iface));
+ ret = nvme_tcp_sock_set_bindtodevice(queue->sock->sk, iface);
if (ret) {
dev_err(nctrl->device,
"failed to bind to interface %s queue %d err %d\n",
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index 75a276d73be3e..ed413aa5601c7 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -1696,10 +1696,66 @@ static void nvmet_tcp_state_change(struct sock *sk)
read_unlock_bh(&sk->sk_callback_lock);
}
+static int nvmet_tcp_sock_no_linger(struct sock *sk)
+{
+ struct linger ling = { .l_onoff = 1, .l_linger = 0 };
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET, SO_LINGER,
+ KERNEL_SOCKPTR(&ling), sizeof(ling));
+}
+
+static int nvmet_tcp_sock_set_priority(struct sock *sk, u32 priority)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET, SO_PRIORITY,
+ KERNEL_SOCKPTR(&priority), sizeof(priority));
+}
+
+static int nvmet_tcp_sock_set_reuseaddr(struct sock *sk)
+{
+ int val = SK_CAN_REUSE;
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET,
+ SO_REUSEADDR, KERNEL_SOCKPTR(&val),
+ sizeof(val));
+}
+
+static int nvmet_tcp_sock_set_nodelay(struct sock *sk)
+{
+ int val = 1;
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_TCP, TCP_NODELAY,
+ KERNEL_SOCKPTR(&val), sizeof(val));
+}
+
+static int nvmet_tcp_sock_set_tos(struct sock *sk)
+{
+ int tos = inet_sk(sk)->rcv_tos;
+
+ if (tos > 0)
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_IP, IP_TOS,
+ KERNEL_SOCKPTR(&tos), sizeof(tos));
+ return 0;
+}
+
+static int nvmet_tcp_sock_set_tclass(struct sock *sk)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6) {
+ int tclass = ip6_tclass(inet6_sk(sk)->rcv_flowinfo);
+
+ if (tclass > 0)
+ return do_sock_setsockopt(sk->sk_socket, false,
+ SOL_IPV6, IPV6_TCLASS,
+ KERNEL_SOCKPTR(&tclass),
+ sizeof(tclass));
+ }
+#endif
+ return 0;
+}
+
static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
{
struct socket *sock = queue->sock;
- struct inet_sock *inet = inet_sk(sock->sk);
int ret;
ret = kernel_getsockname(sock,
@@ -1717,14 +1773,24 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
* close. This is done to prevent stale data from being sent should
* the network connection be restored before TCP times out.
*/
- sock_no_linger(sock->sk);
+ ret = nvmet_tcp_sock_no_linger(sock->sk);
+ if (ret)
+ return ret;
- if (so_priority > 0)
- sock_set_priority(sock->sk, so_priority);
+ if (so_priority > 0) {
+ ret = nvmet_tcp_sock_set_priority(sock->sk, so_priority);
+ if (ret)
+ return ret;
+ }
/* Set socket type of service */
- if (inet->rcv_tos > 0)
- ip_sock_set_tos(sock->sk, inet->rcv_tos);
+ ret = nvmet_tcp_sock_set_tos(sock->sk);
+ if (ret)
+ return ret;
+
+ ret = nvmet_tcp_sock_set_tclass(sock->sk);
+ if (ret)
+ return ret;
ret = 0;
write_lock_bh(&sock->sk->sk_callback_lock);
@@ -2098,10 +2164,26 @@ static int nvmet_tcp_add_port(struct nvmet_port *nport)
port->sock->sk->sk_user_data = port;
port->data_ready = port->sock->sk->sk_data_ready;
port->sock->sk->sk_data_ready = nvmet_tcp_listen_data_ready;
- sock_set_reuseaddr(port->sock->sk);
- tcp_sock_set_nodelay(port->sock->sk);
- if (so_priority > 0)
- sock_set_priority(port->sock->sk, so_priority);
+ ret = nvmet_tcp_sock_set_reuseaddr(port->sock->sk);
+ if (ret) {
+ pr_err("failed to set SO_REUSEADDR on port socket %d\n", ret);
+ goto err_sock;
+ }
+
+ ret = nvmet_tcp_sock_set_nodelay(port->sock->sk);
+ if (ret) {
+ pr_err("failed to set TCP_NODELAY on port socket %d\n", ret);
+ goto err_sock;
+ }
+
+ if (so_priority > 0) {
+ ret = nvmet_tcp_sock_set_priority(port->sock->sk, so_priority);
+ if (ret) {
+ pr_err("failed to set SO_PRIORITY on port socket %d\n",
+ ret);
+ goto err_sock;
+ }
+ }
ret = kernel_bind(port->sock, (struct sockaddr_unsized *)&port->addr,
sizeof(port->addr));
|
| 3/2 | 2026/08/18 06:33 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5286 output: 22 thoughts: 328 Thoughts: **Analyzing a Socket Option Patch in NVMe/TCP Drivers**
Okay, so this patch is touching `drivers/nvme/host/tcp.c` and `drivers/nvme/target/tcp.c`. It's replacing direct calls to those standard TCP socket helpers, like `tcp_sock_set_syncnt`, `tcp_sock_set_nodelay`, and the others, with custom wrappers that are now calling `do_sock_setsockopt`. My first thought is always "Why?". Why the change in approach? Let's dig into `tcp_sock_set_syncnt` itself in the kernel code.
Right, so it looks like they're consolidating these socket option settings through `do_sock_setsockopt`. Now, is this interesting from a fuzzing perspective? Is it reachable and potentially vulnerable? Absolutely. The NVMe TCP host and target drivers are easily spun up in a virtualized environment, using loopback or veth interfaces. So those code paths are definitely accessible. The patch is changing *how* socket options are set, which raises flags for me.
Let me quickly search for `nvme_tcp_alloc_queue` and `nvmet_tcp_set_queue_sock`. Yep, confirmed. This is a core part of NVMe over TCP. And this is worth fuzzing. The patch *is* adding error checking now (like the `if (ret) { dev_err(...); goto err_sock; }` blocks). Previously, were these socket option helpers like `tcp_sock_set_syncnt` void functions or did the return value get ignored? Gotta check `tcp_sock_set_syncnt` now.
|
| 4/2 | 2026/08/18 06:33 | tool | grepper |
0mArgs:{
"Expression": "tcp_sock_set_syncnt"
}Results: {
"Output": "drivers/nvme/host/tcp.c=1798=static int nvme_tcp_sock_set_nodelay(struct sock *sk)\n--\ndrivers/nvme/host/tcp.c-1805-\ndrivers/nvme/host/tcp.c:1806:static int nvme_tcp_sock_set_syncnt(struct sock *sk, int val)\ndrivers/nvme/host/tcp.c-1807-{\n--\ndrivers/nvme/host/tcp.c=1829=static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,\n--\ndrivers/nvme/host/tcp.c-1873-\t/* Single syn retry */\ndrivers/nvme/host/tcp.c:1874:\tret = nvme_tcp_sock_set_syncnt(queue-\u003esock-\u003esk, 1);\ndrivers/nvme/host/tcp.c-1875-\tif (ret) {\n--\ninclude/linux/tcp.h=652=void tcp_sock_set_quickack(struct sock *sk, int val);\ninclude/linux/tcp.h:653:int tcp_sock_set_syncnt(struct sock *sk, int val);\ninclude/linux/tcp.h-654-int tcp_sock_set_user_timeout(struct sock *sk, int val);\n--\nnet/ipv4/tcp.c=3709=EXPORT_SYMBOL(tcp_sock_set_quickack);\nnet/ipv4/tcp.c-3710-\nnet/ipv4/tcp.c:3711:int tcp_sock_set_syncnt(struct sock *sk, int val)\nnet/ipv4/tcp.c-3712-{\n--\nnet/ipv4/tcp.c-3718-}\nnet/ipv4/tcp.c:3719:EXPORT_SYMBOL(tcp_sock_set_syncnt);\nnet/ipv4/tcp.c-3720-\n--\nnet/ipv4/tcp.c=3837=int do_tcp_setsockopt(struct sock *sk, int level, int optname,\n--\nnet/ipv4/tcp.c-3917-\tcase TCP_SYNCNT:\nnet/ipv4/tcp.c:3918:\t\treturn tcp_sock_set_syncnt(sk, val);\nnet/ipv4/tcp.c-3919-\tcase TCP_USER_TIMEOUT:\n--\nnet/ipv4/tcp_timer.c=243=static int tcp_write_timeout(struct sock *sk)\n--\nnet/ipv4/tcp_timer.c-253-\t\t\t__dst_negative_advice(sk);\nnet/ipv4/tcp_timer.c:254:\t\t/* Paired with WRITE_ONCE() in tcp_sock_set_syncnt() */\nnet/ipv4/tcp_timer.c-255-\t\tretry_until = READ_ONCE(icsk-\u003eicsk_syn_retries) ? :\n--\nnet/ipv4/tcp_timer.c=459=static void tcp_fastopen_synack_timer(struct sock *sk, struct request_sock *req)\n--\nnet/ipv4/tcp_timer.c-467-\t/* Add one more retry for fastopen.\nnet/ipv4/tcp_timer.c:468:\t * Paired with WRITE_ONCE() in tcp_sock_set_syncnt()\nnet/ipv4/tcp_timer.c-469-\t */\n--\nnet/sunrpc/xprtsock.c=2280=static void xs_tcp_set_socket_timeouts(struct rpc_xprt *xprt,\n--\nnet/sunrpc/xprtsock.c-2316-\tif (t \u003c= syn_retries)\nnet/sunrpc/xprtsock.c:2317:\t\ttcp_sock_set_syncnt(sock-\u003esk, t - 1);\nnet/sunrpc/xprtsock.c-2318-}\n"
} |
| 5/2 | 2026/08/18 06:33 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 7003 output: 21 thoughts: 98 Thoughts: **Examining the NVMe TCP Socket Option Patch** Okay, so this patch is tweaking how NVMe TCP handles socket options. Specifically, it's about setting the synchronization count. Instead of directly calling `tcp_sock_set_syncnt`, it's now using `nvme_tcp_sock_set_syncnt`, which in turn calls `do_sock_setsockopt`. That's a shift; I'm curious why. Why the indirection? Something must be different. Ah, I see, the implication is that `sock_setsockopt` is undergoing some kind of change or is being deprecated entirely. Right, makes sense. To be sure, I should really verify the implementation of `do_sock_setsockopt` and see what the underlying change is. |
| 6/2 | 2026/08/18 06:33 | tool | grepper |
0mArgs:{
"Expression": "do_sock_setsockopt"
}Results: {
"Output": "drivers/nvme/host/tcp.c=1777=static int nvme_tcp_sock_no_linger(struct sock *sk)\n--\ndrivers/nvme/host/tcp.c-1780-\ndrivers/nvme/host/tcp.c:1781:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET, SO_LINGER,\ndrivers/nvme/host/tcp.c-1782-\t\t\t\t KERNEL_SOCKPTR(\u0026ling), sizeof(ling));\n--\ndrivers/nvme/host/tcp.c=1785=static int nvme_tcp_sock_set_priority(struct sock *sk, u32 priority)\ndrivers/nvme/host/tcp.c-1786-{\ndrivers/nvme/host/tcp.c:1787:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET, SO_PRIORITY,\ndrivers/nvme/host/tcp.c-1788-\t\t\t\t KERNEL_SOCKPTR(\u0026priority), sizeof(priority));\n--\ndrivers/nvme/host/tcp.c=1791=static int nvme_tcp_sock_set_bindtodevice(struct sock *sk, char *iface)\ndrivers/nvme/host/tcp.c-1792-{\ndrivers/nvme/host/tcp.c:1793:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET,\ndrivers/nvme/host/tcp.c-1794-\t\t\t\t SO_BINDTODEVICE, KERNEL_SOCKPTR(iface),\n--\ndrivers/nvme/host/tcp.c=1798=static int nvme_tcp_sock_set_nodelay(struct sock *sk)\n--\ndrivers/nvme/host/tcp.c-1801-\ndrivers/nvme/host/tcp.c:1802:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_TCP, TCP_NODELAY,\ndrivers/nvme/host/tcp.c-1803-\t\t\t\t KERNEL_SOCKPTR(\u0026val), sizeof(val));\n--\ndrivers/nvme/host/tcp.c=1806=static int nvme_tcp_sock_set_syncnt(struct sock *sk, int val)\ndrivers/nvme/host/tcp.c-1807-{\ndrivers/nvme/host/tcp.c:1808:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_TCP, TCP_SYNCNT,\ndrivers/nvme/host/tcp.c-1809-\t\t\t\t KERNEL_SOCKPTR(\u0026val), sizeof(val));\n--\ndrivers/nvme/host/tcp.c=1812=static int nvme_tcp_sock_set_tos(struct sock *sk, int tos)\ndrivers/nvme/host/tcp.c-1813-{\ndrivers/nvme/host/tcp.c:1814:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_IP, IP_TOS,\ndrivers/nvme/host/tcp.c-1815-\t\t\t\t KERNEL_SOCKPTR(\u0026tos), sizeof(tos));\n--\ndrivers/nvme/host/tcp.c=1818=static int nvme_tcp_sock_set_tclass(struct sock *sk, int tclass)\n--\ndrivers/nvme/host/tcp.c-1821-\tif (sk-\u003esk_family == AF_INET6)\ndrivers/nvme/host/tcp.c:1822:\t\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_IPV6,\ndrivers/nvme/host/tcp.c-1823-\t\t\t\t\t IPV6_TCLASS, KERNEL_SOCKPTR(\u0026tclass),\n--\ndrivers/nvme/target/tcp.c=1699=static int nvmet_tcp_sock_no_linger(struct sock *sk)\n--\ndrivers/nvme/target/tcp.c-1702-\ndrivers/nvme/target/tcp.c:1703:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET, SO_LINGER,\ndrivers/nvme/target/tcp.c-1704-\t\t\t\t KERNEL_SOCKPTR(\u0026ling), sizeof(ling));\n--\ndrivers/nvme/target/tcp.c=1707=static int nvmet_tcp_sock_set_priority(struct sock *sk, u32 priority)\ndrivers/nvme/target/tcp.c-1708-{\ndrivers/nvme/target/tcp.c:1709:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET, SO_PRIORITY,\ndrivers/nvme/target/tcp.c-1710-\t\t\t\t KERNEL_SOCKPTR(\u0026priority), sizeof(priority));\n--\ndrivers/nvme/target/tcp.c=1713=static int nvmet_tcp_sock_set_reuseaddr(struct sock *sk)\n--\ndrivers/nvme/target/tcp.c-1716-\ndrivers/nvme/target/tcp.c:1717:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_SOCKET,\ndrivers/nvme/target/tcp.c-1718-\t\t\t\t SO_REUSEADDR, KERNEL_SOCKPTR(\u0026val),\n--\ndrivers/nvme/target/tcp.c=1722=static int nvmet_tcp_sock_set_nodelay(struct sock *sk)\n--\ndrivers/nvme/target/tcp.c-1725-\ndrivers/nvme/target/tcp.c:1726:\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_TCP, TCP_NODELAY,\ndrivers/nvme/target/tcp.c-1727-\t\t\t\t KERNEL_SOCKPTR(\u0026val), sizeof(val));\n--\ndrivers/nvme/target/tcp.c=1730=static int nvmet_tcp_sock_set_tos(struct sock *sk)\n--\ndrivers/nvme/target/tcp.c-1734-\tif (tos \u003e 0)\ndrivers/nvme/target/tcp.c:1735:\t\treturn do_sock_setsockopt(sk-\u003esk_socket, false, SOL_IP, IP_TOS,\ndrivers/nvme/target/tcp.c-1736-\t\t\t\t\t KERNEL_SOCKPTR(\u0026tos), sizeof(tos));\n--\ndrivers/nvme/target/tcp.c=1740=static int nvmet_tcp_sock_set_tclass(struct sock *sk)\n--\ndrivers/nvme/target/tcp.c-1746-\t\tif (tclass \u003e 0)\ndrivers/nvme/target/tcp.c:1747:\t\t\treturn do_sock_setsockopt(sk-\u003esk_socket, false,\ndrivers/nvme/target/tcp.c-1748-\t\t\t\t\t\t SOL_IPV6, IPV6_TCLASS,\n--\ninclude/net/sock.h=1888=int sock_setsockopt(struct socket *sock, int level, int op,\ninclude/net/sock.h-1889-\t\t sockptr_t optval, unsigned int optlen);\ninclude/net/sock.h:1890:int do_sock_setsockopt(struct socket *sock, bool compat, int level,\ninclude/net/sock.h-1891-\t\t int optname, sockptr_t optval, int optlen);\n--\nio_uring/cmd_net.c=52=static inline int io_uring_cmd_setsockopt(struct socket *sock,\n--\nio_uring/cmd_net.c-67-\nio_uring/cmd_net.c:68:\treturn do_sock_setsockopt(sock, compat, level, optname, optval_s,\nio_uring/cmd_net.c-69-\t\t\t\t optlen);\n--\nnet/socket.c=2330=static bool sock_use_custom_sol_socket(const struct socket *sock)\n--\nnet/socket.c-2334-\nnet/socket.c:2335:int do_sock_setsockopt(struct socket *sock, bool compat, int level,\nnet/socket.c-2336-\t\t int optname, sockptr_t optval, int optlen)\n--\nnet/socket.c-2373-}\nnet/socket.c:2374:EXPORT_SYMBOL(do_sock_setsockopt);\nnet/socket.c-2375-\n--\nnet/socket.c=2379=int __sys_setsockopt(int fd, int level, int optname, char __user *user_optval,\n--\nnet/socket.c-2392-\nnet/socket.c:2393:\treturn do_sock_setsockopt(sock, compat, level, optname, optval, optlen);\nnet/socket.c-2394-}\n"
} |
| 7/2 | 2026/08/18 06:33 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 9536 output: 23 thoughts: 106 Thoughts: **NVMe TCP Patch Review** Okay, so this patch is switching NVMe TCP over to using `do_sock_setsockopt` instead of the more direct helper `tcp_sock_set_syncnt`. I'm immediately curious about this choice. Why the change? My initial thought is that maybe `tcp_sock_set_syncnt` doesn't provide sufficient error handling, or perhaps it doesn't perform the same checks as `do_sock_setsockopt`. It's possible the direct helper is missing something critical. Time to dig into the code. I'll need to go and see how `tcp_sock_set_syncnt` works, probably starting with `net/ipv4/tcp.c` to see the implementation and its limitations. Let's see what's actually going on. |
| 8/2 | 2026/08/18 06:33 | tool | grepper |
0mArgs:{
"Expression": "int tcp_sock_set_syncnt"
}Results: {
"Output": "include/linux/tcp.h=652=void tcp_sock_set_quickack(struct sock *sk, int val);\ninclude/linux/tcp.h:653:int tcp_sock_set_syncnt(struct sock *sk, int val);\ninclude/linux/tcp.h-654-int tcp_sock_set_user_timeout(struct sock *sk, int val);\n--\nnet/ipv4/tcp.c=3709=EXPORT_SYMBOL(tcp_sock_set_quickack);\nnet/ipv4/tcp.c-3710-\nnet/ipv4/tcp.c:3711:int tcp_sock_set_syncnt(struct sock *sk, int val)\nnet/ipv4/tcp.c-3712-{\n"
} |
| 9/2 | 2026/08/18 06:33 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 10040 output: 37 thoughts: 25 Thoughts: Here's my summary, as though I'm reading and thinking about the code: **Diving into `tcp_sock_set_syncnt` in `net/ipv4/tcp.c`** Alright, time to crack open `tcp_sock_set_syncnt` in the IPv4 TCP implementation. I need to understand how this function works, and how it interacts with the rest of the stack. Specifically, I'm thinking about the implications for SYN flood protection and connection rate limiting. I’m betting this directly influences how aggressively we respond to SYN packets. The name itself suggests we're setting or configuring a synchronization count, which likely relates to how many outstanding SYN_RECV connections are allowed before we start shedding incoming SYNs. I need to know the specific variables involved, how the count is updated (likely based on socket state and events), and whether any adaptive mechanisms are employed. I expect to see checks against global thresholds or per-socket settings. Knowing this gives the ability to properly tune the system. I also need to check how it handles different scenarios, particularly under heavy load or in the presence of malicious traffic. I am looking for the conditional branches, the locking mechanisms used (if any), and any interaction with other kernel subsystems like memory management or networking devices. Let's see if this reveals any potential bottlenecks or areas for optimization. Right, let's start reading. |
| 10/2 | 2026/08/18 06:33 | tool | read-file |
0mArgs:{
"File": "net/ipv4/tcp.c",
"FirstLine": 3711,
"LineCount": 20
}Results: {
"Contents": "3711:\tint tcp_sock_set_syncnt(struct sock *sk, int val)\n3712:\t{\n3713:\t\tif (val \u003c 1 || val \u003e MAX_TCP_SYNCNT)\n3714:\t\t\treturn -EINVAL;\n3715:\t\n3716:\t\tWRITE_ONCE(inet_csk(sk)-\u003eicsk_syn_retries, val);\n3717:\t\treturn 0;\n3718:\t}\n3719:\tEXPORT_SYMBOL(tcp_sock_set_syncnt);\n3720:\t\n3721:\tint tcp_sock_set_user_timeout(struct sock *sk, int val)\n3722:\t{\n3723:\t\t/* Cap the max time in ms TCP will retry or probe the window\n3724:\t\t * before giving up and aborting (ETIMEDOUT) a connection.\n3725:\t\t */\n3726:\t\tif (val \u003c 0)\n3727:\t\t\treturn -EINVAL;\n3728:\t\n3729:\t\tWRITE_ONCE(inet_csk(sk)-\u003eicsk_user_timeout, val);\n3730:\t\treturn 0;\n"
} |
| 11/2 | 2026/08/18 06:33 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 10714 output: 24 thoughts: 121 Thoughts: **Analyzing TCP Socket Configuration** Okay, hold on a second. I'm looking at this NVMe TCP code, and something's not quite right with this socket configuration. Specifically, I'm focusing on these two function calls: `tcp_sock_set_syncnt` and `tcp_sock_set_nodelay`. The first one, `tcp_sock_set_syncnt`, returns an integer, right? Yet, this code is just blowing off the return value. Is that intentional? I'd expect to see some kind of error checking if it's returning a value. It's setting the SYN retry count to 1, which might be fine, but ignoring a potential failure seems risky. Then there's `tcp_sock_set_nodelay`. Right, that's a void function, so there's no return value to check. At least, that's as I recall. It's always possible I'm missing something, so I need to go look into the implementation of `tcp_sock_set_nodelay` to make sure I'm not overlooking a potential issue here. I need to understand what this function is doing and what side effects it might have, or what it can return in terms of internal signaling. |
| 12/2 | 2026/08/18 06:33 | tool | grepper |
0mArgs:{
"Expression": "void tcp_sock_set_nodelay"
}Results: {
"Output": "include/linux/tcp.h=650=void __tcp_sock_set_nodelay(struct sock *sk, bool on);\ninclude/linux/tcp.h:651:void tcp_sock_set_nodelay(struct sock *sk);\ninclude/linux/tcp.h-652-void tcp_sock_set_quickack(struct sock *sk, int val);\n--\nnet/ipv4/tcp.c=3668=void __tcp_sock_set_nodelay(struct sock *sk, bool on)\n--\nnet/ipv4/tcp.c-3677-\nnet/ipv4/tcp.c:3678:void tcp_sock_set_nodelay(struct sock *sk)\nnet/ipv4/tcp.c-3679-{\n"
} |
| 13/2 | 2026/08/18 06:33 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 11334 output: 34 thoughts: 134 Thoughts: **Analyzing the Socket Optimization Patch** Okay, so this patch is switching out `tcp_sock_set_nodelay(sk)` for `do_sock_setsockopt(sk->sk_socket, false, SOL_TCP, TCP_NODELAY, KERNEL_SOCKPTR(&val), sizeof(val))`. Interesting. My initial thought is *why*? What's the driving force behind this change? Is it simply a matter of ensuring the socket option is set with absolute certainty, or is there something more subtle at play here? Right, I'm leaning toward the latter. `do_sock_setsockopt` probably handles more than just the direct setting of the option. It likely incorporates some vital locking mechanisms or perhaps calls into BPF (Berkeley Packet Filter) hooks. That's the real potential value-add here – invoking BPF hooks is a definite possibility! I need to confirm this hunch. Let's dive into the `net/socket.c` file and specifically examine the `do_sock_setsockopt` function. Let's see what's really happening under the hood. I'm going to track down the call and see what is actually executed. |
| 14/2 | 2026/08/18 06:33 | tool | read-file |
0mArgs:{
"File": "net/socket.c",
"FirstLine": 2335,
"LineCount": 40
}Results: {
"Contents": "2335:\tint do_sock_setsockopt(struct socket *sock, bool compat, int level,\n2336:\t\t\t int optname, sockptr_t optval, int optlen)\n2337:\t{\n2338:\t\tconst struct proto_ops *ops;\n2339:\t\tchar *kernel_optval = NULL;\n2340:\t\tint err;\n2341:\t\n2342:\t\tif (optlen \u003c 0)\n2343:\t\t\treturn -EINVAL;\n2344:\t\n2345:\t\terr = security_socket_setsockopt(sock, level, optname);\n2346:\t\tif (err)\n2347:\t\t\tgoto out_put;\n2348:\t\n2349:\t\tif (!compat)\n2350:\t\t\terr = BPF_CGROUP_RUN_PROG_SETSOCKOPT(sock-\u003esk, \u0026level, \u0026optname,\n2351:\t\t\t\t\t\t\t optval, \u0026optlen,\n2352:\t\t\t\t\t\t\t \u0026kernel_optval);\n2353:\t\tif (err \u003c 0)\n2354:\t\t\tgoto out_put;\n2355:\t\tif (err \u003e 0) {\n2356:\t\t\terr = 0;\n2357:\t\t\tgoto out_put;\n2358:\t\t}\n2359:\t\n2360:\t\tif (kernel_optval)\n2361:\t\t\toptval = KERNEL_SOCKPTR(kernel_optval);\n2362:\t\tops = READ_ONCE(sock-\u003eops);\n2363:\t\tif (level == SOL_SOCKET \u0026\u0026 !sock_use_custom_sol_socket(sock))\n2364:\t\t\terr = sock_setsockopt(sock, level, optname, optval, optlen);\n2365:\t\telse if (unlikely(!ops-\u003esetsockopt))\n2366:\t\t\terr = -EOPNOTSUPP;\n2367:\t\telse\n2368:\t\t\terr = ops-\u003esetsockopt(sock, level, optname, optval,\n2369:\t\t\t\t\t\t optlen);\n2370:\t\tkfree(kernel_optval);\n2371:\tout_put:\n2372:\t\treturn err;\n2373:\t}\n2374:\tEXPORT_SYMBOL(do_sock_setsockopt);\n"
} |
| 15/2 | 2026/08/18 06:33 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 12373 output: 19 thoughts: 237 Thoughts: **My Analysis of the NVMe TCP Driver Changes** Okay, so the `do_sock_setsockopt` function is the key here. It's calling `security_socket_setsockopt` and, importantly, `BPF_CGROUP_RUN_PROG_SETSOCKOPT`. This is a significant functional shift. Now, the NVMe TCP driver respects LSMs and BPF cgroup hooks for socket options, meaning BPF programs can now intercept and *modify* those options, or LSMs can flat-out deny them. That’s a game changer from a security perspective! And here’s another interesting wrinkle: this patch includes proper error handling. If `do_sock_setsockopt` fails, it now errors out and the queue allocation fails. This is a crucial functional change that I absolutely need to fuzz, given its interaction with BPF and LSMs – potential attack surface right there. The question is, is this code reachable? Yes, NVMe TCP is a real thing, so it *is* reachable. Time to identify the main functions to target for fuzzing. Looks like `nvme_tcp_alloc_queue`, `nvmet_tcp_set_queue_sock`, and `nvmet_tcp_add_port` are the key entry points I need to examine. These seem to be the critical functions where the socket option setting occurs. Before diving in, I need to check for any NVMe TCP-specific configurations that might influence the behavior. I don't want to miss anything. |
| 16/2 | 2026/08/18 06:33 | tool | grepper |
0mArgs:{
"Expression": "config NVME_TCP"
}Results: {
"Output": "drivers/nvme/host/Kconfig=67=config NVME_FC\n--\ndrivers/nvme/host/Kconfig-82-\ndrivers/nvme/host/Kconfig:83:config NVME_TCP\ndrivers/nvme/host/Kconfig-84-\ttristate \"NVM Express over Fabrics TCP host driver\"\n--\ndrivers/nvme/host/Kconfig-99-\ndrivers/nvme/host/Kconfig:100:config NVME_TCP_TLS\ndrivers/nvme/host/Kconfig-101-\tbool \"NVMe over Fabrics TCP TLS encryption support\"\n"
} |
| 17/2 | 2026/08/18 06:33 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 13113 output: 20 thoughts: 5 Thoughts: Okay, I'm ready. Let's do this. I'll distill those thoughts and present them as my own internal monologue, geared towards someone who *gets* it. Here we go: **Analyzing the Objective** Alright, let's break this down. First, the core function or the main object of the task to be defined. From the initial prompt, I need to understand what the user is trying to get out of this and what is the goal. I should probably focus on a specific area, and focus on the parameters of that area, to find a niche for the function. From there, I need to figure out what type of response is needed. Are we talking about a simple factual summary, a nuanced interpretation, or a complex synthesis? The tone and style of the response are just as crucial. Is this an informal chat, a formal report, or something in between? I'll probably need to tailor everything to match that. After all, the context provided is, well, it needs further context from the user, but the goal will be clear. I can work with that, however, and extrapolate, for now. |
| 18/2 | 2026/08/18 06:33 | tool | grepper |
0mError:no matches Args: {
"Expression": "config NVMET_TCP"
}Results: {
"error": "no matches"
} |
| 19/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 13388 output: 21 thoughts: 17 Thoughts: Here's my attempt at summarizing the thought process, as if I were a Linux kernel expert: **Kconfig Checkpoint: NVMe Target** Okay, before diving any deeper into the code, let's just make sure we haven't missed something obvious in the configuration. The NVMe target code, specifically the `drivers/nvme/target/Kconfig` file, is a good starting point to check if any relevant configuration options are enabled or disabled. It's easy to overlook a crucial dependency or an overlooked flag. Perhaps a specific feature related to what I'm looking into is gated behind a Kconfig option that isn't set the way I expect. Or maybe there's a setting that impacts the behavior of the subsystem I'm interested in and I forgot to account for it. Time for a quick sanity check to make sure I'm not chasing a ghost. I'll review it and make a mental note of the Kconfig options. I do not want to waste my time. Let's make sure I'm not missing something basic before I dig into the code. |
| 20/2 | 2026/08/18 06:34 | tool | grepper |
0mArgs:{
"Expression": "config NVME_TARGET_TCP"
}Results: {
"Output": "drivers/nvme/target/Kconfig=74=config NVME_TARGET_FCLOOP\n--\ndrivers/nvme/target/Kconfig-86-\ndrivers/nvme/target/Kconfig:87:config NVME_TARGET_TCP\ndrivers/nvme/target/Kconfig-88-\ttristate \"NVMe over Fabrics TCP target support\"\n--\ndrivers/nvme/target/Kconfig-96-\ndrivers/nvme/target/Kconfig:97:config NVME_TARGET_TCP_TLS\ndrivers/nvme/target/Kconfig-98-\tbool \"NVMe over Fabrics TCP target TLS encryption support\"\n"
} |
| 21/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 13820 output: 72 thoughts: 27 Thoughts: Okay, here's my understanding, written as if it were my thought process: **NVMe over TCP Configuration Deep Dive** Alright, let's break this down. My focus right now is on configuring NVMe over TCP. Specifically, I'm thinking about `NVME_TCP` and `NVME_TARGET_TCP`. Those are the key configuration options I'm working with. Now, the next logical step is to understand their dependencies. What are the prerequisites? What other configurations must be in place or enabled for these to function correctly? Are there specific kernel modules required? Do they rely on certain networking parameters being set? What about security protocols and authentication mechanisms - how do they tie in? I need to build a mental map of their interdependencies to ensure a stable and performant NVMe-oF implementation. |
| 22/2 | 2026/08/18 06:34 | tool | read-file |
0mArgs:{
"File": "drivers/nvme/host/Kconfig",
"FirstLine": 83,
"LineCount": 15
}Results: {
"Contents": " 83:\tconfig NVME_TCP\n 84:\t\ttristate \"NVM Express over Fabrics TCP host driver\"\n 85:\t\tdepends on INET\n 86:\t\tdepends on BLOCK\n 87:\t\tselect CRC32\n 88:\t\tselect NET_CRC32C\n 89:\t\tselect NVME_FABRICS\n 90:\t\thelp\n 91:\t\t This provides support for the NVMe over Fabrics protocol using\n 92:\t\t the TCP transport. This allows you to use remote block devices\n 93:\t\t exported using the NVMe protocol set.\n 94:\t\n 95:\t\t To configure a NVMe over Fabrics controller use the nvme-cli tool\n 96:\t\t from https://github.com/linux-nvme/nvme-cli.\n 97:\t\n"
} |
| 23/2 | 2026/08/18 06:34 | tool | read-file |
0mArgs:{
"File": "drivers/nvme/target/Kconfig",
"FirstLine": 87,
"LineCount": 15
}Results: {
"Contents": " 87:\tconfig NVME_TARGET_TCP\n 88:\t\ttristate \"NVMe over Fabrics TCP target support\"\n 89:\t\tdepends on INET\n 90:\t\tdepends on NVME_TARGET\n 91:\t\thelp\n 92:\t\t This enables the NVMe TCP target support, which allows exporting NVMe\n 93:\t\t devices over TCP.\n 94:\t\n 95:\t\t If unsure, say N.\n 96:\t\n 97:\tconfig NVME_TARGET_TCP_TLS\n 98:\t\tbool \"NVMe over Fabrics TCP target TLS encryption support\"\n 99:\t\tdepends on NVME_TARGET_TCP\n 100:\t\tselect NET_HANDSHAKE\n 101:\t\tselect TLS\n"
} |
| 24/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 14503 output: 20 thoughts: 47 Thoughts: Okay, here's my take on those dependencies, summarized as a thought process: **Dependency Deep Dive** Alright, let's break this down. It looks like `NVME_TCP` has a bit of a chain going on. It's built on top of both `INET` and `BLOCK`. That makes sense; you need the network for TCP and the block device layer for the NVMe data. Now, `NVME_TARGET_TCP` mirrors that, relying on `INET` again (for the TCP part) and `NVME_TARGET` for the NVMe target functionality. Since `NVME_TARGET_TCP` directly depends on `NVME_TARGET`, which is also a dependency of `NVME_TCP`, let's just make sure `NVME_TARGET` is behaving as expected, and go from there. |
| 25/2 | 2026/08/18 06:34 | tool | grepper |
0mArgs:{
"Expression": "config NVME_TARGET$"
}Results: {
"Output": "drivers/nvme/target/Kconfig-2-\ndrivers/nvme/target/Kconfig:3:config NVME_TARGET\ndrivers/nvme/target/Kconfig-4-\ttristate \"NVMe Target support\"\n"
} |
| 26/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 14815 output: 35 thoughts: 20 Thoughts: Here's my summary, as if I were thinking these thoughts: **Analyzing the Kconfig for NVMe Target Drivers** Okay, let's dive into the `drivers/nvme/target/Kconfig` file. I'm specifically looking around line 3, since that's often where the core configuration options are declared, or at least where the initial overview of the module is presented. I want to quickly grasp the essential building blocks for NVMe target driver configurations. My goal is to understand how these modules are enabled, any dependencies they have, and the main configuration knobs available to tailor this code. Let's see what we've got. |
| 27/2 | 2026/08/18 06:34 | tool | read-file |
0mArgs:{
"File": "drivers/nvme/target/Kconfig",
"FirstLine": 1,
"LineCount": 15
}Results: {
"Contents": " 1:\t# SPDX-License-Identifier: GPL-2.0-only\n 2:\t\n 3:\tconfig NVME_TARGET\n 4:\t\ttristate \"NVMe Target support\"\n 5:\t\tdepends on BLOCK\n 6:\t\tselect CONFIGFS_FS\n 7:\t\tselect NVME_KEYRING if NVME_TARGET_TCP_TLS\n 8:\t\tselect KEYS if NVME_TARGET_TCP_TLS\n 9:\t\tselect SGL_ALLOC\n 10:\t\thelp\n 11:\t\t This enabled target side support for the NVMe protocol, that is\n 12:\t\t it allows the Linux kernel to implement NVMe subsystems and\n 13:\t\t controllers and export Linux block devices as NVMe namespaces.\n 14:\t\t You need to select at least one of the transports below to make this\n 15:\t\t functionality useful.\n"
} |
| 28/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 15228 output: 19 thoughts: 40 Thoughts: Okay, here's my interpretation of those thoughts, framed as my own mental process, given my expertise: **Configuration Considerations for NVMe over TCP** Alright, let's break this down. My initial thought is that the *fundamental* configurations are clearly centered around NVMe over TCP. So, I see `NVME_TCP`, `NVME_TARGET`, and `NVME_TARGET_TCP` as being the core. That's the obvious starting point for defining the TCP-specific NVMe environment. However... hang on a second. I'm missing something, aren't I? For a host machine to actually *utilize* this NVMe over TCP setup, and to ensure that the core NVMe framework is properly instantiated, I'm almost certain that `NVME_CORE` is going to be a requirement for the host side as well. It's too fundamental to miss. I need that base layer up and running. Good to catch that! I will also ensure this will not conflict with the existing setup, and that I did not need to add additional settings. |
| 29/2 | 2026/08/18 06:34 | tool | grepper |
0mArgs:{
"Expression": "config NVME_CORE"
}Results: {
"Output": "drivers/nvme/host/Kconfig-1-# SPDX-License-Identifier: GPL-2.0-only\ndrivers/nvme/host/Kconfig:2:config NVME_CORE\ndrivers/nvme/host/Kconfig-3-\ttristate\n"
} |
| 30/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 15588 output: 19 thoughts: 21 Thoughts: Here's my summary, as though I'm thinking through this process: **NVMe TCP and Core Module Dependency Check** Okay, so `NVME_TCP` has been chosen. Now, my immediate thought is to verify whether that implies the selection of `NVME_CORE` as well. That's a critical dependency; if TCP is active, we absolutely need the core NVMe functionality. I need to quickly confirm this assumption. Let's dig into the configuration and make sure that relationship is being properly enforced, and if not, why not. There may be configuration flags to review. If there's an issue here, it will be a major blocker. |
| 31/2 | 2026/08/18 06:34 | tool | grepper |
0mArgs:{
"Expression": "select NVME_CORE"
}Results: {
"Output": "drivers/nvme/host/Kconfig=5=config BLK_DEV_NVME\n--\ndrivers/nvme/host/Kconfig-7-\tdepends on PCI \u0026\u0026 BLOCK\ndrivers/nvme/host/Kconfig:8:\tselect NVME_CORE\ndrivers/nvme/host/Kconfig-9-\thelp\n--\ndrivers/nvme/host/Kconfig=47=config NVME_FABRICS\ndrivers/nvme/host/Kconfig:48:\tselect NVME_CORE\ndrivers/nvme/host/Kconfig-49-\tselect NVME_KEYRING if NVME_TCP_TLS\n--\ndrivers/nvme/host/Kconfig=125=config NVME_APPLE\n--\ndrivers/nvme/host/Kconfig-129-\tdepends on ARCH_APPLE || COMPILE_TEST\ndrivers/nvme/host/Kconfig:130:\tselect NVME_CORE\ndrivers/nvme/host/Kconfig-131-\thelp\n"
} |
| 32/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 16015 output: 22 thoughts: 186 Thoughts: **My NVMe/TCP Configuration Strategy** Okay, so I've got it. `NVME_TCP` *definitely* pulls in `NVME_FABRICS`, which then brings in `NVME_CORE`. That makes sense in the overall architecture. Right, so for the configuration options, I'm dealing with `NVME_TCP`, `NVME_TARGET`, and `NVME_TARGET_TCP`. Got it. Now, let's nail down the key functions I need to focus on. I'm thinking: `nvme_tcp_alloc_queue`, `nvmet_tcp_set_queue_sock`, and `nvmet_tcp_add_port`. Those seem like the core building blocks for this TCP implementation. Hold on a second... are those functions static? I've got to double-check that. Wait a minute... the instructions are pretty clear on this: they're pushing me towards *non-static*, *non-inlined* functions as preferred API entry points. That gives them distinct symbols, which is much better. Okay, so `nvme_tcp_alloc_queue` is *static*. Hmm. That means I need to find the callers to determine it is the preferred choice, per the documentation. Let's see who's calling it... |
| 33/2 | 2026/08/18 06:34 | tool | grepper |
0mArgs:{
"Expression": "nvme_tcp_alloc_queue"
}Results: {
"Output": "drivers/nvme/host/tcp.c=1818=static int nvme_tcp_sock_set_tclass(struct sock *sk, int tclass)\n--\ndrivers/nvme/host/tcp.c-1828-\ndrivers/nvme/host/tcp.c:1829:static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,\ndrivers/nvme/host/tcp.c-1830-\t\t\t\tkey_serial_t pskid)\n--\ndrivers/nvme/host/tcp.c=2179=static int nvme_tcp_alloc_admin_queue(struct nvme_ctrl *ctrl)\n--\ndrivers/nvme/host/tcp.c-2197-\ndrivers/nvme/host/tcp.c:2198:\tret = nvme_tcp_alloc_queue(ctrl, 0, pskid);\ndrivers/nvme/host/tcp.c-2199-\tif (ret)\n--\ndrivers/nvme/host/tcp.c=2213=static int __nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl)\n--\ndrivers/nvme/host/tcp.c-2238-\tfor (i = 1; i \u003c ctrl-\u003equeue_count; i++) {\ndrivers/nvme/host/tcp.c:2239:\t\tret = nvme_tcp_alloc_queue(ctrl, i,\ndrivers/nvme/host/tcp.c-2240-\t\t\t\tctrl-\u003etls_pskid);\n"
} |
| 34/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 16898 output: 24 thoughts: 33 Thoughts: Here's my thought process, as if I were analyzing that code: **Finding NVMe-oF Queue Allocation Callers** Okay, so I need to track down where `nvme_tcp_alloc_admin_queue` and `__nvme_tcp_alloc_io_queues` are being called within the NVMe-oF stack. These are critical functions for queue setup, and I need to understand how they are being initialized and managed. I suspect a good place to start would be in the driver initialization routines and potentially within connection or transport layer setup functions. The underscore prefix on `__nvme_tcp_alloc_io_queues` strongly suggests it's an internal function, probably called by something higher up. I need to be careful to identify *all* call sites, as there might be multiple paths depending on how the system is configured or how errors are handled. I'll need to use my preferred toolchain, likely grep or a more sophisticated code browser, to pinpoint every instance of these functions and then carefully analyze the surrounding code to understand the context and rationale behind each call. Understanding the calling context is key. What data structures are passed in? What are the error handling paths? What are the synchronization primitives used? These are all important details for the analysis. |
| 35/2 | 2026/08/18 06:34 | tool | grepper |
0mArgs:{
"Expression": "nvme_tcp_alloc_admin_queue"
}Results: {
"Output": "drivers/nvme/host/tcp.c=2160=static int nvme_tcp_start_io_queues(struct nvme_ctrl *ctrl,\n--\ndrivers/nvme/host/tcp.c-2178-\ndrivers/nvme/host/tcp.c:2179:static int nvme_tcp_alloc_admin_queue(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2180-{\n--\ndrivers/nvme/host/tcp.c=2348=static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new)\n--\ndrivers/nvme/host/tcp.c-2351-\ndrivers/nvme/host/tcp.c:2352:\terror = nvme_tcp_alloc_admin_queue(ctrl);\ndrivers/nvme/host/tcp.c-2353-\tif (error)\n--\ndrivers/nvme/host/tcp.c=2433=static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl,\n--\ndrivers/nvme/host/tcp.c-2466- *\ndrivers/nvme/host/tcp.c:2467: * We cannot always revoke the key as nvme_tcp_alloc_admin_queue() is called\ndrivers/nvme/host/tcp.c-2468- * twice during secure concatenation, once on a 'normal' connection to run the\n"
} |
| 36/2 | 2026/08/18 06:34 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 17599 output: 24 thoughts: 22 Thoughts: Here's my take on those thoughts, tailored for an expert audience: **Analyzing the nvme_tcp_configure_admin_queue Function** Okay, so `nvme_tcp_configure_admin_queue` is a static function. That immediately makes me curious. Static functions, by definition, have limited scope, which usually hints at their being critical for a specific, focused part of the driver. Now, the natural next step is to pinpoint *where* this function is being called. My immediate thought is, understanding its call chain will illuminate its role within the NVMe-oF TCP driver. Knowing its caller will give me crucial context. I need to trace back from this function and see what's actually using it. |
| 37/2 | 2026/08/18 06:35 | tool | grepper |
0mArgs:{
"Expression": "nvme_tcp_configure_admin_queue"
}Results: {
"Output": "drivers/nvme/host/tcp.c=2279=static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new)\n--\ndrivers/nvme/host/tcp.c-2347-\ndrivers/nvme/host/tcp.c:2348:static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new)\ndrivers/nvme/host/tcp.c-2349-{\n--\ndrivers/nvme/host/tcp.c=2477=static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new)\n--\ndrivers/nvme/host/tcp.c-2481-\ndrivers/nvme/host/tcp.c:2482:\tret = nvme_tcp_configure_admin_queue(ctrl, new);\ndrivers/nvme/host/tcp.c-2483-\tif (ret)\n--\ndrivers/nvme/host/tcp.c-2490-\t\tnvme_tcp_teardown_admin_queue(ctrl, false);\ndrivers/nvme/host/tcp.c:2491:\t\tret = nvme_tcp_configure_admin_queue(ctrl, false);\ndrivers/nvme/host/tcp.c-2492-\t\tif (ret)\n"
} |
| 38/2 | 2026/08/18 06:35 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 18140 output: 22 thoughts: 23 Thoughts: Here's my understanding of the situation, given my expertise: **My Perspective on the NVMe-oF Control Path Setup** Okay, so looking at this code, it's pretty clear that `nvme_tcp_setup_ctrl` is a critical function within the NVMe over TCP stack. My experience tells me that `nvme_tcp_setup_ctrl` is the function responsible for performing the core initialization and configuration of the NVMe controller, or "ctrl" as it's referred to here, within the TCP transport layer. The important piece here is that it is called by `nvme_tcp_create_ctrl`. Thus, it is called when the controller is being initialized. This makes perfect sense; `nvme_tcp_create_ctrl` is the higher-level function that instantiates the controller in the first place, and then *immediately* needs to call `nvme_tcp_setup_ctrl` to get everything properly configured and ready to handle commands. I'd expect `nvme_tcp_setup_ctrl` to handle tasks like setting up the necessary data structures for the connection, allocating resources, registering the controller, and getting the controller ready to communicate with the host. |
| 39/2 | 2026/08/18 06:35 | tool | grepper |
0mArgs:{
"Expression": "nvme_tcp_setup_ctrl"
}Results: {
"Output": "drivers/nvme/host/tcp.c=2472=static bool nvme_tcp_key_revoke_needed(struct nvme_ctrl *ctrl)\n--\ndrivers/nvme/host/tcp.c-2476-\ndrivers/nvme/host/tcp.c:2477:static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new)\ndrivers/nvme/host/tcp.c-2478-{\n--\ndrivers/nvme/host/tcp.c=2560=static void nvme_tcp_reconnect_ctrl_work(struct work_struct *work)\n--\ndrivers/nvme/host/tcp.c-2568-\ndrivers/nvme/host/tcp.c:2569:\tret = nvme_tcp_setup_ctrl(ctrl, false);\ndrivers/nvme/host/tcp.c-2570-\tif (ret)\n--\ndrivers/nvme/host/tcp.c=2630=static void nvme_reset_ctrl_work(struct work_struct *work)\n--\ndrivers/nvme/host/tcp.c-2649-\ndrivers/nvme/host/tcp.c:2650:\tret = nvme_tcp_setup_ctrl(ctrl, false);\ndrivers/nvme/host/tcp.c-2651-\tif (ret)\n--\ndrivers/nvme/host/tcp.c=3085=static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev,\n--\ndrivers/nvme/host/tcp.c-3104-\ndrivers/nvme/host/tcp.c:3105:\tret = nvme_tcp_setup_ctrl(\u0026ctrl-\u003ectrl, true);\ndrivers/nvme/host/tcp.c-3106-\tif (ret)\n"
} |
| 40/2 | 2026/08/18 06:35 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 18905 output: 24 thoughts: 38 Thoughts: Here's my take on those thoughts: **Analyzing the NVMe-oF Controller Creation Process** Okay, so `nvme_tcp_create_ctrl` is the function that kicks off the whole controller creation process in the NVMe-oF TCP stack. My immediate instinct, given the context, is to delve deeper into how this controller gets its network interface set up. The first logical step is to understand what functions call `nvmet_tcp_set_queue_sock`. I need to figure out how the socket association happens, because that's fundamentally how the controller talks over TCP. Let's see who's calling it; that should give a much clearer picture of what the setup logic is. |
| 41/2 | 2026/08/18 06:35 | tool | grepper |
0mArgs:{
"Expression": "nvmet_tcp_set_queue_sock"
}Results: {
"Output": "drivers/nvme/target/tcp.c=1740=static int nvmet_tcp_sock_set_tclass(struct sock *sk)\n--\ndrivers/nvme/target/tcp.c-1755-\ndrivers/nvme/target/tcp.c:1756:static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)\ndrivers/nvme/target/tcp.c-1757-{\n--\ndrivers/nvme/target/tcp.c=1890=static void nvmet_tcp_tls_handshake_done(void *data, int status,\n--\ndrivers/nvme/target/tcp.c-1914-\tif (!status)\ndrivers/nvme/target/tcp.c:1915:\t\tstatus = nvmet_tcp_set_queue_sock(queue);\ndrivers/nvme/target/tcp.c-1916-\n--\ndrivers/nvme/target/tcp.c=1977=static void nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,\n--\ndrivers/nvme/target/tcp.c-2054-\ndrivers/nvme/target/tcp.c:2055:\tret = nvmet_tcp_set_queue_sock(queue);\ndrivers/nvme/target/tcp.c-2056-\tif (ret)\n"
} |
| 42/2 | 2026/08/18 06:35 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 19469 output: 22 thoughts: 23 Thoughts: Okay, here's my interpretation of that thought process, assuming I'm an expert in NVMe-oF TCP implementation: **Understanding the Queue Allocation in the NVMe-oF TCP Stack** Alright, so here's the deal. I'm looking at the flow here, and my brain immediately zeroes in on the relationship between `nvmet_tcp_alloc_queue` and `nvmet_tcp_accept_work`. It's pretty clear: `nvmet_tcp_accept_work` *calls* `nvmet_tcp_alloc_queue`. That means the `accept_work` function, which is handling new connection acceptances on the TCP side, is directly responsible for allocating new I/O queues. This is how the system sets up the resources it needs to handle the I/O for each incoming NVMe-oF connection. It's the point where a new client is going to start talking to the target. Seems pretty straightforward, and it points to a critical area for performance – any bottleneck there will be felt across all connection acceptances. Makes sense that this would be a focus for optimization or scrutiny if there are any issues with connection rates. |
| 43/2 | 2026/08/18 06:35 | tool | grepper |
0mArgs:{
"Expression": "nvmet_tcp_alloc_queue"
}Results: {
"Output": "drivers/nvme/target/tcp.c=1974=static void nvmet_tcp_tls_handshake_timeout(struct work_struct *w) {}\n--\ndrivers/nvme/target/tcp.c-1976-\ndrivers/nvme/target/tcp.c:1977:static void nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,\ndrivers/nvme/target/tcp.c-1978-\t\tstruct socket *newsock)\n--\ndrivers/nvme/target/tcp.c=2086=static void nvmet_tcp_accept_work(struct work_struct *w)\n--\ndrivers/nvme/target/tcp.c-2099-\t\t}\ndrivers/nvme/target/tcp.c:2100:\t\tnvmet_tcp_alloc_queue(port, newsock);\ndrivers/nvme/target/tcp.c-2101-\t}\n"
} |
| 44/2 | 2026/08/18 06:35 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 20003 output: 22 thoughts: 30 Thoughts: Here's my thinking process: **Diving into NVMe-oF TCP Implementation Details** Okay, so I'm looking at `nvmet_tcp_accept_work`. It's clearly a function related to the NVMe over TCP implementation, and specifically, it's operating within the kernel's workqueue system. This immediately tells me it's handling asynchronous tasks, likely related to accepting new connections. That's a solid piece of context. Now, what's its relationship to the broader picture? I need to consider how this function fits into the overall connection lifecycle. Specifically, I'm trying to place it in the sequence of actions a NIC must perform to accept a connection. And that brings another thought. What about `nvmet_tcp_add_port`? I bet that function likely does some initial setup related to the network port and probably sets up the framework for accepting connections, so I should see how this function and `nvmet_tcp_accept_work` relate to each other. I'll need to examine the control flow to see how they interact, and whether they're invoked directly, or by some other system call. |
| 45/2 | 2026/08/18 06:35 | tool | grepper |
0mArgs:{
"Expression": "nvmet_tcp_add_port"
}Results: {
"Output": "drivers/nvme/target/tcp.c=2104=static void nvmet_tcp_listen_data_ready(struct sock *sk)\n--\ndrivers/nvme/target/tcp.c-2119-\ndrivers/nvme/target/tcp.c:2120:static int nvmet_tcp_add_port(struct nvmet_port *nport)\ndrivers/nvme/target/tcp.c-2121-{\n--\ndrivers/nvme/target/tcp.c=2313=static const struct nvmet_fabrics_ops nvmet_tcp_ops = {\n--\ndrivers/nvme/target/tcp.c-2316-\t.msdbd\t\t\t= 1,\ndrivers/nvme/target/tcp.c:2317:\t.add_port\t\t= nvmet_tcp_add_port,\ndrivers/nvme/target/tcp.c-2318-\t.remove_port\t\t= nvmet_tcp_remove_port,\n"
} |
| 46/2 | 2026/08/18 06:35 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 20552 output: 22 thoughts: 110 Thoughts: **My Initial Thoughts on NVMe-oF/TCP Port Addition** Okay, so I'm diving into the NVMe-oF/TCP fabric operations, specifically looking at the port addition process. The `nvmet_tcp_add_port` function immediately stands out as the core callback within `nvmet_fabrics_ops`. That means my focus needs to be on how it interacts with the control and queue creation. So, let's zero in on `nvme_tcp_create_ctrl`, `nvmet_tcp_add_port`, and `nvmet_tcp_alloc_queue`. But hold on... `nvmet_tcp_alloc_queue` is *static*? Hmmm, that's a bit unusual for a key function like this. I need to figure out how it's being accessed. Is there some non-static entry point that calls it? And now that I think about it, is `nvme_tcp_create_ctrl` static too? I'll need to double-check that. That could change everything! |
| 47/2 | 2026/08/18 06:35 | tool | grepper |
0mArgs:{
"Expression": "nvme_tcp_create_ctrl"
}Results: {
"Output": "drivers/nvme/host/tcp.c=3003=static struct nvme_tcp_ctrl *nvme_tcp_alloc_ctrl(struct device *dev,\n--\ndrivers/nvme/host/tcp.c-3084-\ndrivers/nvme/host/tcp.c:3085:static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev,\ndrivers/nvme/host/tcp.c-3086-\t\tstruct nvmf_ctrl_options *opts)\n--\ndrivers/nvme/host/tcp.c=3127=static struct nvmf_transport_ops nvme_tcp_transport = {\n--\ndrivers/nvme/host/tcp.c-3136-\t\t\t NVMF_OPT_KEYRING | NVMF_OPT_TLS_KEY | NVMF_OPT_CONCAT,\ndrivers/nvme/host/tcp.c:3137:\t.create_ctrl\t= nvme_tcp_create_ctrl,\ndrivers/nvme/host/tcp.c-3138-};\n"
} |
| 48/2 | 2026/08/18 06:35 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 21180 output: 22 thoughts: 83 Thoughts: **Examining the NVMe-oF Transport Operations** Okay, so I'm thinking about how the NVMe-oF fabric operations are structured. It's becoming clear that these callback functions are all statically registered within `nvmf_transport_ops` and `nvmet_fabrics_ops`. Right, that makes sense. Specifically, I'm noting `nvme_tcp_create_ctrl` and `nvmet_tcp_add_port` as examples from the TCP transport. Hmm, let's not forget that `nvme_tcp_setup_ctrl` is also static. Given this static registration pattern, my next logical step is to quickly scan for any *non*-static functions within this area. It will be much more interesting if I discover any. |
| 49/2 | 2026/08/18 06:35 | tool | grepper |
0mError:no matches Args: {
"Expression": "EXPORT_SYMBOL.*nvme_tcp"
}Results: {
"error": "no matches"
} |
| 50/2 | 2026/08/18 06:35 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 21463 output: 28 thoughts: 18 Thoughts: Okay, here's my interpretation of those thoughts, tailored for an expert audience, presented in the first person: **Navigating the NVMe/TCP Symbol Landscape** Alright, so the first thing that hits me is the complete absence of any exported symbols specifically for NVMe/TCP. That's... interesting. Usually, you'd expect at least *some* entry points, especially if this is a publicly accessible interface. The lack of them suggests a few possibilities, each worth further investigation. Could this mean it's entirely kernel-internal, or heavily reliant on a specific driver infrastructure? Is this an intentional design choice to maintain a tight control plane? It's definitely a red flag for any straightforward integration scenario. Then, the mind naturally wanders to non-static functions. Maybe the key functions *aren't* static. That's the other angle to consider. If the critical code isn't declared `static`, it suggests a potential for linking or access, although it still doesn’t solve the original problem of not having a clear, obvious API. This shifts the focus from looking for a direct interface to potentially reverse engineering internal structures or functions within the target code. If I can understand how these non-static functions interact, I might be able to piece together the pieces without having to directly interface with an exported API. |
| 51/2 | 2026/08/18 06:35 | tool | grepper |
0mArgs:{
"Expression": "^[a-zA-Z_].*nvme_tcp_"
}Results: {
"Output": "\nFull output is too long, showing 500 out of 638 lines.\nUse more precise expression if possible.\n\ndrivers/nvme/host/tcp.c-25-\ndrivers/nvme/host/tcp.c:26:struct nvme_tcp_queue;\ndrivers/nvme/host/tcp.c-27-\n--\ndrivers/nvme/host/tcp.c=53=MODULE_PARM_DESC(tls_handshake_timeout,\n--\ndrivers/nvme/host/tcp.c-56-\ndrivers/nvme/host/tcp.c:57:static atomic_t nvme_tcp_cpu_queues[NR_CPUS];\ndrivers/nvme/host/tcp.c-58-\ndrivers/nvme/host/tcp.c:59:enum nvme_tcp_send_state {\ndrivers/nvme/host/tcp.c-60-\tNVME_TCP_SEND_CMD_PDU = 0,\n--\ndrivers/nvme/host/tcp.c-65-\ndrivers/nvme/host/tcp.c:66:struct nvme_tcp_request {\ndrivers/nvme/host/tcp.c-67-\tstruct nvme_request\treq;\n--\ndrivers/nvme/host/tcp.c-89-\ndrivers/nvme/host/tcp.c:90:enum nvme_tcp_queue_flags {\ndrivers/nvme/host/tcp.c-91-\tNVME_TCP_Q_ALLOCATED\t= 0,\n--\ndrivers/nvme/host/tcp.c-96-\ndrivers/nvme/host/tcp.c:97:enum nvme_tcp_recv_state {\ndrivers/nvme/host/tcp.c-98-\tNVME_TCP_RECV_PDU = 0,\n--\ndrivers/nvme/host/tcp.c-102-\ndrivers/nvme/host/tcp.c:103:struct nvme_tcp_ctrl;\ndrivers/nvme/host/tcp.c:104:struct nvme_tcp_queue {\ndrivers/nvme/host/tcp.c-105-\tstruct socket\t\t*sock;\n--\ndrivers/nvme/host/tcp.c-151-\ndrivers/nvme/host/tcp.c:152:struct nvme_tcp_ctrl {\ndrivers/nvme/host/tcp.c-153-\t/* read only in the hot path */\n--\ndrivers/nvme/host/tcp.c-169-\ndrivers/nvme/host/tcp.c:170:static LIST_HEAD(nvme_tcp_ctrl_list);\ndrivers/nvme/host/tcp.c:171:static DEFINE_MUTEX(nvme_tcp_ctrl_mutex);\ndrivers/nvme/host/tcp.c:172:static struct workqueue_struct *nvme_tcp_wq;\ndrivers/nvme/host/tcp.c:173:static const struct blk_mq_ops nvme_tcp_mq_ops;\ndrivers/nvme/host/tcp.c:174:static const struct blk_mq_ops nvme_tcp_admin_mq_ops;\ndrivers/nvme/host/tcp.c:175:static int nvme_tcp_try_send(struct nvme_tcp_queue *queue);\ndrivers/nvme/host/tcp.c-176-\n--\ndrivers/nvme/host/tcp.c-183- */\ndrivers/nvme/host/tcp.c:184:static void nvme_tcp_reclassify_socket(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-185-{\n--\ndrivers/nvme/host/tcp.c-209-\ndrivers/nvme/host/tcp.c:210:static inline struct nvme_tcp_ctrl *to_tcp_ctrl(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-211-{\n--\ndrivers/nvme/host/tcp.c-214-\ndrivers/nvme/host/tcp.c:215:static inline int nvme_tcp_queue_id(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-216-{\n--\ndrivers/nvme/host/tcp.c-219-\ndrivers/nvme/host/tcp.c:220:static inline bool nvme_tcp_recv_pdu_supported(enum nvme_tcp_pdu_type type)\ndrivers/nvme/host/tcp.c-221-{\n--\ndrivers/nvme/host/tcp.c-235- */\ndrivers/nvme/host/tcp.c:236:static inline bool nvme_tcp_queue_tls(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-237-{\n--\ndrivers/nvme/host/tcp.c-246- */\ndrivers/nvme/host/tcp.c:247:static inline bool nvme_tcp_tls_configured(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-248-{\n--\ndrivers/nvme/host/tcp.c-254-\ndrivers/nvme/host/tcp.c:255:static inline struct blk_mq_tags *nvme_tcp_tagset(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-256-{\n--\ndrivers/nvme/host/tcp.c-263-\ndrivers/nvme/host/tcp.c:264:static inline u8 nvme_tcp_hdgst_len(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-265-{\n--\ndrivers/nvme/host/tcp.c-268-\ndrivers/nvme/host/tcp.c:269:static inline u8 nvme_tcp_ddgst_len(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-270-{\n--\ndrivers/nvme/host/tcp.c-273-\ndrivers/nvme/host/tcp.c:274:static inline void *nvme_tcp_req_cmd_pdu(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-275-{\n--\ndrivers/nvme/host/tcp.c-278-\ndrivers/nvme/host/tcp.c:279:static inline void *nvme_tcp_req_data_pdu(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-280-{\n--\ndrivers/nvme/host/tcp.c-285-\ndrivers/nvme/host/tcp.c:286:static inline size_t nvme_tcp_inline_data_size(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-287-{\n--\ndrivers/nvme/host/tcp.c-292-\ndrivers/nvme/host/tcp.c:293:static inline bool nvme_tcp_async_req(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-294-{\n--\ndrivers/nvme/host/tcp.c-297-\ndrivers/nvme/host/tcp.c:298:static inline bool nvme_tcp_has_inline_data(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-299-{\n--\ndrivers/nvme/host/tcp.c-310-\ndrivers/nvme/host/tcp.c:311:static inline struct page *nvme_tcp_req_cur_page(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-312-{\n--\ndrivers/nvme/host/tcp.c-315-\ndrivers/nvme/host/tcp.c:316:static inline size_t nvme_tcp_req_cur_offset(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-317-{\n--\ndrivers/nvme/host/tcp.c-320-\ndrivers/nvme/host/tcp.c:321:static inline size_t nvme_tcp_req_cur_length(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-322-{\n--\ndrivers/nvme/host/tcp.c-326-\ndrivers/nvme/host/tcp.c:327:static inline size_t nvme_tcp_pdu_data_left(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-328-{\n--\ndrivers/nvme/host/tcp.c-332-\ndrivers/nvme/host/tcp.c:333:static inline size_t nvme_tcp_pdu_last_send(struct nvme_tcp_request *req,\ndrivers/nvme/host/tcp.c-334-\t\tint len)\n--\ndrivers/nvme/host/tcp.c-338-\ndrivers/nvme/host/tcp.c:339:static void nvme_tcp_init_iter(struct nvme_tcp_request *req,\ndrivers/nvme/host/tcp.c-340-\t\tunsigned int dir)\n--\ndrivers/nvme/host/tcp.c-363-\ndrivers/nvme/host/tcp.c:364:static inline void nvme_tcp_advance_req(struct nvme_tcp_request *req,\ndrivers/nvme/host/tcp.c-365-\t\tint len)\n--\ndrivers/nvme/host/tcp.c-376-\ndrivers/nvme/host/tcp.c:377:static inline void nvme_tcp_send_all(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-378-{\n--\ndrivers/nvme/host/tcp.c-386-\ndrivers/nvme/host/tcp.c:387:static inline bool nvme_tcp_queue_has_pending(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-388-{\n--\ndrivers/nvme/host/tcp.c-392-\ndrivers/nvme/host/tcp.c:393:static inline bool nvme_tcp_queue_more(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-394-{\n--\ndrivers/nvme/host/tcp.c-398-\ndrivers/nvme/host/tcp.c:399:static inline void nvme_tcp_queue_request(struct nvme_tcp_request *req,\ndrivers/nvme/host/tcp.c-400-\t\tbool last)\n--\ndrivers/nvme/host/tcp.c-422-\ndrivers/nvme/host/tcp.c:423:static void nvme_tcp_process_req_list(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-424-{\n--\ndrivers/nvme/host/tcp.c-433-\ndrivers/nvme/host/tcp.c:434:static inline struct nvme_tcp_request *\ndrivers/nvme/host/tcp.c:435:nvme_tcp_fetch_request(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-436-{\n--\ndrivers/nvme/host/tcp.c-455-\ndrivers/nvme/host/tcp.c:456:static inline void nvme_tcp_ddgst_update(u32 *crcp,\ndrivers/nvme/host/tcp.c-457-\t\tstruct page *page, size_t off, size_t len)\n--\ndrivers/nvme/host/tcp.c-472-\ndrivers/nvme/host/tcp.c:473:static inline __le32 nvme_tcp_ddgst_final(u32 crc)\ndrivers/nvme/host/tcp.c-474-{\n--\ndrivers/nvme/host/tcp.c-477-\ndrivers/nvme/host/tcp.c:478:static inline __le32 nvme_tcp_hdgst(const void *pdu, size_t len)\ndrivers/nvme/host/tcp.c-479-{\n--\ndrivers/nvme/host/tcp.c-482-\ndrivers/nvme/host/tcp.c:483:static inline void nvme_tcp_set_hdgst(void *pdu, size_t len)\ndrivers/nvme/host/tcp.c-484-{\n--\ndrivers/nvme/host/tcp.c-487-\ndrivers/nvme/host/tcp.c:488:static int nvme_tcp_verify_hdgst(struct nvme_tcp_queue *queue,\ndrivers/nvme/host/tcp.c-489-\t\tvoid *pdu, size_t pdu_len)\n--\ndrivers/nvme/host/tcp.c-513-\ndrivers/nvme/host/tcp.c:514:static int nvme_tcp_check_ddgst(struct nvme_tcp_queue *queue, void *pdu)\ndrivers/nvme/host/tcp.c-515-{\n--\ndrivers/nvme/host/tcp.c-533-\ndrivers/nvme/host/tcp.c:534:static void nvme_tcp_exit_request(struct blk_mq_tag_set *set,\ndrivers/nvme/host/tcp.c-535-\t\tstruct request *rq, unsigned int hctx_idx)\n--\ndrivers/nvme/host/tcp.c-541-\ndrivers/nvme/host/tcp.c:542:static int nvme_tcp_init_request(struct blk_mq_tag_set *set,\ndrivers/nvme/host/tcp.c-543-\t\tstruct request *rq, unsigned int hctx_idx,\n--\ndrivers/nvme/host/tcp.c-568-\ndrivers/nvme/host/tcp.c:569:static int nvme_tcp_init_hctx(struct blk_mq_hw_ctx *hctx, void *data,\ndrivers/nvme/host/tcp.c-570-\t\tunsigned int hctx_idx)\n--\ndrivers/nvme/host/tcp.c-578-\ndrivers/nvme/host/tcp.c:579:static int nvme_tcp_init_admin_hctx(struct blk_mq_hw_ctx *hctx, void *data,\ndrivers/nvme/host/tcp.c-580-\t\tunsigned int hctx_idx)\n--\ndrivers/nvme/host/tcp.c-588-\ndrivers/nvme/host/tcp.c:589:static enum nvme_tcp_recv_state\ndrivers/nvme/host/tcp.c:590:nvme_tcp_recv_state(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-591-{\n--\ndrivers/nvme/host/tcp.c-596-\ndrivers/nvme/host/tcp.c:597:static void nvme_tcp_init_recv_ctx(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-598-{\n--\ndrivers/nvme/host/tcp.c-605-\ndrivers/nvme/host/tcp.c:606:static void nvme_tcp_error_recovery(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-607-{\n--\ndrivers/nvme/host/tcp.c-614-\ndrivers/nvme/host/tcp.c:615:static int nvme_tcp_process_nvme_cqe(struct nvme_tcp_queue *queue,\ndrivers/nvme/host/tcp.c-616-\t\tstruct nvme_completion *cqe)\n--\ndrivers/nvme/host/tcp.c-640-\ndrivers/nvme/host/tcp.c:641:static int nvme_tcp_handle_c2h_data(struct nvme_tcp_queue *queue,\ndrivers/nvme/host/tcp.c-642-\t\tstruct nvme_tcp_data_pdu *pdu)\n--\ndrivers/nvme/host/tcp.c-674-\ndrivers/nvme/host/tcp.c:675:static int nvme_tcp_handle_comp(struct nvme_tcp_queue *queue,\ndrivers/nvme/host/tcp.c-676-\t\tstruct nvme_tcp_rsp_pdu *pdu)\n--\ndrivers/nvme/host/tcp.c-696-\ndrivers/nvme/host/tcp.c:697:static void nvme_tcp_setup_h2c_data_pdu(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-698-{\n--\ndrivers/nvme/host/tcp.c-730-\ndrivers/nvme/host/tcp.c:731:static int nvme_tcp_handle_r2t(struct nvme_tcp_queue *queue,\ndrivers/nvme/host/tcp.c-732-\t\tstruct nvme_tcp_r2t_pdu *pdu)\n--\ndrivers/nvme/host/tcp.c-789-\ndrivers/nvme/host/tcp.c:790:static void nvme_tcp_handle_c2h_term(struct nvme_tcp_queue *queue,\ndrivers/nvme/host/tcp.c-791-\t\tstruct nvme_tcp_term_pdu *pdu)\n--\ndrivers/nvme/host/tcp.c-823-\ndrivers/nvme/host/tcp.c:824:static int nvme_tcp_recv_pdu(struct nvme_tcp_queue *queue, struct sk_buff *skb,\ndrivers/nvme/host/tcp.c-825-\t\tunsigned int *offset, size_t *len)\n--\ndrivers/nvme/host/tcp.c-895-\ndrivers/nvme/host/tcp.c:896:static inline void nvme_tcp_end_request(struct request *rq, u16 status)\ndrivers/nvme/host/tcp.c-897-{\n--\ndrivers/nvme/host/tcp.c-903-\ndrivers/nvme/host/tcp.c:904:static int nvme_tcp_recv_data(struct nvme_tcp_queue *queue, struct sk_buff *skb,\ndrivers/nvme/host/tcp.c-905-\t\t\t unsigned int *offset, size_t *len)\n--\ndrivers/nvme/host/tcp.c-974-\ndrivers/nvme/host/tcp.c:975:static int nvme_tcp_recv_ddgst(struct nvme_tcp_queue *queue,\ndrivers/nvme/host/tcp.c-976-\t\tstruct sk_buff *skb, unsigned int *offset, size_t *len)\n--\ndrivers/nvme/host/tcp.c-1019-\ndrivers/nvme/host/tcp.c:1020:static int nvme_tcp_recv_skb(read_descriptor_t *desc, struct sk_buff *skb,\ndrivers/nvme/host/tcp.c-1021-\t\t\t unsigned int offset, size_t len)\n--\ndrivers/nvme/host/tcp.c-1055-\ndrivers/nvme/host/tcp.c:1056:static void nvme_tcp_data_ready(struct sock *sk)\ndrivers/nvme/host/tcp.c-1057-{\n--\ndrivers/nvme/host/tcp.c-1069-\ndrivers/nvme/host/tcp.c:1070:static void nvme_tcp_write_space(struct sock *sk)\ndrivers/nvme/host/tcp.c-1071-{\n--\ndrivers/nvme/host/tcp.c-1085-\ndrivers/nvme/host/tcp.c:1086:static void nvme_tcp_state_change(struct sock *sk)\ndrivers/nvme/host/tcp.c-1087-{\n--\ndrivers/nvme/host/tcp.c-1113-\ndrivers/nvme/host/tcp.c:1114:static inline void nvme_tcp_done_send_req(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1115-{\n--\ndrivers/nvme/host/tcp.c-1118-\ndrivers/nvme/host/tcp.c:1119:static void nvme_tcp_fail_request(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-1120-{\n--\ndrivers/nvme/host/tcp.c-1131-\ndrivers/nvme/host/tcp.c:1132:static int nvme_tcp_try_send_data(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-1133-{\n--\ndrivers/nvme/host/tcp.c-1194-\ndrivers/nvme/host/tcp.c:1195:static int nvme_tcp_try_send_cmd_pdu(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-1196-{\n--\ndrivers/nvme/host/tcp.c-1235-\ndrivers/nvme/host/tcp.c:1236:static int nvme_tcp_try_send_data_pdu(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-1237-{\n--\ndrivers/nvme/host/tcp.c-1269-\ndrivers/nvme/host/tcp.c:1270:static int nvme_tcp_try_send_ddgst(struct nvme_tcp_request *req)\ndrivers/nvme/host/tcp.c-1271-{\n--\ndrivers/nvme/host/tcp.c-1302-\ndrivers/nvme/host/tcp.c:1303:static int nvme_tcp_try_send(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1304-{\n--\ndrivers/nvme/host/tcp.c-1352-\ndrivers/nvme/host/tcp.c:1353:static int nvme_tcp_try_recv(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1354-{\n--\ndrivers/nvme/host/tcp.c-1368-\ndrivers/nvme/host/tcp.c:1369:static void nvme_tcp_io_work(struct work_struct *w)\ndrivers/nvme/host/tcp.c-1370-{\n--\ndrivers/nvme/host/tcp.c-1406-\ndrivers/nvme/host/tcp.c:1407:static void nvme_tcp_free_async_req(struct nvme_tcp_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-1408-{\n--\ndrivers/nvme/host/tcp.c-1413-\ndrivers/nvme/host/tcp.c:1414:static int nvme_tcp_alloc_async_req(struct nvme_tcp_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-1415-{\n--\ndrivers/nvme/host/tcp.c-1429-\ndrivers/nvme/host/tcp.c:1430:static void nvme_tcp_free_queue(struct nvme_ctrl *nctrl, int qid)\ndrivers/nvme/host/tcp.c-1431-{\n--\ndrivers/nvme/host/tcp.c-1470-\ndrivers/nvme/host/tcp.c:1471:static int nvme_tcp_init_connection(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1472-{\n--\ndrivers/nvme/host/tcp.c-1601-\ndrivers/nvme/host/tcp.c:1602:static bool nvme_tcp_admin_queue(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1603-{\n--\ndrivers/nvme/host/tcp.c-1606-\ndrivers/nvme/host/tcp.c:1607:static bool nvme_tcp_default_queue(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1608-{\n--\ndrivers/nvme/host/tcp.c-1615-\ndrivers/nvme/host/tcp.c:1616:static bool nvme_tcp_read_queue(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1617-{\n--\ndrivers/nvme/host/tcp.c-1626-\ndrivers/nvme/host/tcp.c:1627:static bool nvme_tcp_poll_queue(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1628-{\n--\ndrivers/nvme/host/tcp.c-1648- */\ndrivers/nvme/host/tcp.c:1649:static void nvme_tcp_set_queue_io_cpu(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-1650-{\n--\ndrivers/nvme/host/tcp.c-1691-\ndrivers/nvme/host/tcp.c:1692:static void nvme_tcp_tls_done(void *data, int status, key_serial_t pskid)\ndrivers/nvme/host/tcp.c-1693-{\n--\ndrivers/nvme/host/tcp.c-1723-\ndrivers/nvme/host/tcp.c:1724:static int nvme_tcp_start_tls(struct nvme_ctrl *nctrl,\ndrivers/nvme/host/tcp.c-1725-\t\t\t struct nvme_tcp_queue *queue,\n--\ndrivers/nvme/host/tcp.c-1776-\ndrivers/nvme/host/tcp.c:1777:static int nvme_tcp_sock_no_linger(struct sock *sk)\ndrivers/nvme/host/tcp.c-1778-{\n--\ndrivers/nvme/host/tcp.c-1784-\ndrivers/nvme/host/tcp.c:1785:static int nvme_tcp_sock_set_priority(struct sock *sk, u32 priority)\ndrivers/nvme/host/tcp.c-1786-{\n--\ndrivers/nvme/host/tcp.c-1790-\ndrivers/nvme/host/tcp.c:1791:static int nvme_tcp_sock_set_bindtodevice(struct sock *sk, char *iface)\ndrivers/nvme/host/tcp.c-1792-{\n--\ndrivers/nvme/host/tcp.c-1797-\ndrivers/nvme/host/tcp.c:1798:static int nvme_tcp_sock_set_nodelay(struct sock *sk)\ndrivers/nvme/host/tcp.c-1799-{\n--\ndrivers/nvme/host/tcp.c-1805-\ndrivers/nvme/host/tcp.c:1806:static int nvme_tcp_sock_set_syncnt(struct sock *sk, int val)\ndrivers/nvme/host/tcp.c-1807-{\n--\ndrivers/nvme/host/tcp.c-1811-\ndrivers/nvme/host/tcp.c:1812:static int nvme_tcp_sock_set_tos(struct sock *sk, int tos)\ndrivers/nvme/host/tcp.c-1813-{\n--\ndrivers/nvme/host/tcp.c-1817-\ndrivers/nvme/host/tcp.c:1818:static int nvme_tcp_sock_set_tclass(struct sock *sk, int tclass)\ndrivers/nvme/host/tcp.c-1819-{\n--\ndrivers/nvme/host/tcp.c-1828-\ndrivers/nvme/host/tcp.c:1829:static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,\ndrivers/nvme/host/tcp.c-1830-\t\t\t\tkey_serial_t pskid)\n--\ndrivers/nvme/host/tcp.c-2024-\ndrivers/nvme/host/tcp.c:2025:static void nvme_tcp_restore_sock_ops(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-2026-{\n--\ndrivers/nvme/host/tcp.c-2036-\ndrivers/nvme/host/tcp.c:2037:static void __nvme_tcp_stop_queue(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-2038-{\n--\ndrivers/nvme/host/tcp.c-2043-\ndrivers/nvme/host/tcp.c:2044:static void nvme_tcp_stop_queue_nowait(struct nvme_ctrl *nctrl, int qid)\ndrivers/nvme/host/tcp.c-2045-{\n--\ndrivers/nvme/host/tcp.c-2062-\ndrivers/nvme/host/tcp.c:2063:static void nvme_tcp_wait_queue(struct nvme_ctrl *nctrl, int qid)\ndrivers/nvme/host/tcp.c-2064-{\n--\ndrivers/nvme/host/tcp.c-2080-\ndrivers/nvme/host/tcp.c:2081:static void nvme_tcp_stop_queue(struct nvme_ctrl *nctrl, int qid)\ndrivers/nvme/host/tcp.c-2082-{\n--\ndrivers/nvme/host/tcp.c-2087-\ndrivers/nvme/host/tcp.c:2088:static void nvme_tcp_setup_sock_ops(struct nvme_tcp_queue *queue)\ndrivers/nvme/host/tcp.c-2089-{\n--\ndrivers/nvme/host/tcp.c-2103-\ndrivers/nvme/host/tcp.c:2104:static int nvme_tcp_start_queue(struct nvme_ctrl *nctrl, int idx)\ndrivers/nvme/host/tcp.c-2105-{\n--\ndrivers/nvme/host/tcp.c-2130-\ndrivers/nvme/host/tcp.c:2131:static void nvme_tcp_free_admin_queue(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2132-{\n--\ndrivers/nvme/host/tcp.c-2141-\ndrivers/nvme/host/tcp.c:2142:static void nvme_tcp_free_io_queues(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2143-{\n--\ndrivers/nvme/host/tcp.c-2149-\ndrivers/nvme/host/tcp.c:2150:static void nvme_tcp_stop_io_queues(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2151-{\n--\ndrivers/nvme/host/tcp.c-2159-\ndrivers/nvme/host/tcp.c:2160:static int nvme_tcp_start_io_queues(struct nvme_ctrl *ctrl,\ndrivers/nvme/host/tcp.c-2161-\t\t\t\t int first, int last)\n--\ndrivers/nvme/host/tcp.c-2178-\ndrivers/nvme/host/tcp.c:2179:static int nvme_tcp_alloc_admin_queue(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2180-{\n--\ndrivers/nvme/host/tcp.c-2212-\ndrivers/nvme/host/tcp.c:2213:static int __nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2214-{\n--\ndrivers/nvme/host/tcp.c-2253-\ndrivers/nvme/host/tcp.c:2254:static int nvme_tcp_alloc_io_queues(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2255-{\n--\ndrivers/nvme/host/tcp.c-2278-\ndrivers/nvme/host/tcp.c:2279:static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new)\ndrivers/nvme/host/tcp.c-2280-{\n--\ndrivers/nvme/host/tcp.c-2347-\ndrivers/nvme/host/tcp.c:2348:static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new)\ndrivers/nvme/host/tcp.c-2349-{\n--\ndrivers/nvme/host/tcp.c-2397-\ndrivers/nvme/host/tcp.c:2398:static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl,\ndrivers/nvme/host/tcp.c-2399-\t\tbool remove)\n--\ndrivers/nvme/host/tcp.c-2416-\ndrivers/nvme/host/tcp.c:2417:static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl,\ndrivers/nvme/host/tcp.c-2418-\t\tbool remove)\n--\ndrivers/nvme/host/tcp.c-2432-\ndrivers/nvme/host/tcp.c:2433:static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl,\ndrivers/nvme/host/tcp.c-2434-\t\tint status)\n--\ndrivers/nvme/host/tcp.c-2471- */\ndrivers/nvme/host/tcp.c:2472:static bool nvme_tcp_key_revoke_needed(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2473-{\n--\ndrivers/nvme/host/tcp.c-2476-\ndrivers/nvme/host/tcp.c:2477:static int nvme_tcp_setup_ctrl(struct nvme_ctrl *ctrl, bool new)\ndrivers/nvme/host/tcp.c-2478-{\n--\ndrivers/nvme/host/tcp.c-2559-\ndrivers/nvme/host/tcp.c:2560:static void nvme_tcp_reconnect_ctrl_work(struct work_struct *work)\ndrivers/nvme/host/tcp.c-2561-{\n--\ndrivers/nvme/host/tcp.c-2587-\ndrivers/nvme/host/tcp.c:2588:static void nvme_tcp_error_recovery_work(struct work_struct *work)\ndrivers/nvme/host/tcp.c-2589-{\n--\ndrivers/nvme/host/tcp.c-2616-\ndrivers/nvme/host/tcp.c:2617:static void nvme_tcp_teardown_ctrl(struct nvme_ctrl *ctrl, bool shutdown)\ndrivers/nvme/host/tcp.c-2618-{\n--\ndrivers/nvme/host/tcp.c-2624-\ndrivers/nvme/host/tcp.c:2625:static void nvme_tcp_delete_ctrl(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2626-{\n--\ndrivers/nvme/host/tcp.c=2630=static void nvme_reset_ctrl_work(struct work_struct *work)\n--\ndrivers/nvme/host/tcp.c-2660-\ndrivers/nvme/host/tcp.c:2661:static void nvme_tcp_stop_ctrl(struct nvme_ctrl *ctrl)\ndrivers/nvme/host/tcp.c-2662-{\n--\ndrivers/nvme/host/tcp.c-2666-\ndrivers/nvme/host/tcp.c:2667:static void nvme_tcp_free_ctrl(struct nvme_ctrl *nctrl)\ndrivers/nvme/host/tcp.c-2668-{\n--\ndrivers/nvme/host/tcp.c-2683-\ndrivers/nvme/host/tcp.c:2684:static void nvme_tcp_set_sg_null(struct nvme_command *c)\ndrivers/nvme/host/tcp.c-2685-{\n--\ndrivers/nvme/host/tcp.c-2693-\ndrivers/nvme/host/tcp.c:2694:static void nvme_tcp_set_sg_inline(struct nvme_tcp_queue *queue,\ndrivers/nvme/host/tcp.c-2695-\t\tstruct nvme_command *c, u32 data_len)\n--\ndrivers/nvme/host/tcp.c-2703-\ndrivers/nvme/host/tcp.c:2704:static void nvme_tcp_set_sg_host_data(struct nvme_command *c,\ndrivers/nvme/host/tcp.c-2705-\t\tu32 data_len)\n--\ndrivers/nvme/host/tcp.c-2714-\ndrivers/nvme/host/tcp.c:2715:static void nvme_tcp_submit_async_event(struct nvme_ctrl *arg)\ndrivers/nvme/host/tcp.c-2716-{\n--\ndrivers/nvme/host/tcp.c-2744-\ndrivers/nvme/host/tcp.c:2745:static void nvme_tcp_complete_timed_out(struct request *rq)\n\n"
} |
| 52/2 | 2026/08/18 06:36 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 31493 output: 22 thoughts: 312 Thoughts: **My Revised Symbol Focus** Okay, hold on. I was initially fixated on whether `nvme_tcp_init_connection` or `nvme_tcp_alloc_queue` were static. Right, those are static. But, I think I can refine this. I can absolutely use `nvme_tcp_alloc_queue`, `nvmet_tcp_set_queue_sock`, and `nvmet_tcp_add_port` as my key FocusSymbols. The guidelines specifically prefer non-static, non-inlined entrypoint functions. However, if that ideal isn't possible, then I'm fine with listing the static functions if they fit the bill. Thinking further, *nvme_tcp_create_ctrl* is, in fact, the entry point for controller creation. It is static, but because its address is taken during the registration as a callback in `nvmf_transport_ops`, the compiler will not inline it. Excellent. That fits. Similarly, `nvmet_tcp_add_port` is also registered, in `nvmet_fabrics_ops`. `nvme_tcp_alloc_queue` could be inlined since it's called in a loop, but `nvme_tcp_alloc_admin_queue` and `nvme_tcp_alloc_io_queues` are definitely not inlined. So, let's stick with `nvme_tcp_create_ctrl` and `nvmet_tcp_add_port` as the primary FocusSymbols for now. Now, I should double check `nvmet_tcp_add_port` within `drivers/nvme/target/tcp.c` to make sure there are no other issues. |
| 53/2 | 2026/08/18 06:36 | tool | grepper |
0mArgs:{
"Expression": "nvmet_tcp_add_port"
}Results: {
"Output": "drivers/nvme/target/tcp.c=2104=static void nvmet_tcp_listen_data_ready(struct sock *sk)\n--\ndrivers/nvme/target/tcp.c-2119-\ndrivers/nvme/target/tcp.c:2120:static int nvmet_tcp_add_port(struct nvmet_port *nport)\ndrivers/nvme/target/tcp.c-2121-{\n--\ndrivers/nvme/target/tcp.c=2313=static const struct nvmet_fabrics_ops nvmet_tcp_ops = {\n--\ndrivers/nvme/target/tcp.c-2316-\t.msdbd\t\t\t= 1,\ndrivers/nvme/target/tcp.c:2317:\t.add_port\t\t= nvmet_tcp_add_port,\ndrivers/nvme/target/tcp.c-2318-\t.remove_port\t\t= nvmet_tcp_remove_port,\n"
} |
| 54/2 | 2026/08/18 06:36 | llm | patch-evaluator |
0mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 32445 output: 207 thoughts: 529 Thoughts: **My Analysis of the NVMe TCP Socket Option Patch** Okay, let's break this down systematically. First, `nvmet_tcp_add_port` is definitely a callback, which is good to note for later analysis. Now, what about `nvmet_tcp_set_queue_sock`? Ah, yes, that's called within `nvmet_tcp_alloc_queue`, which in turn is called by `nvmet_tcp_accept_work`. And `nvmet_tcp_accept_work` is a workqueue function, meaning we're taking its address. It won't be inlined. So we need to add that one to the list as well. Therefore, for our FocusSymbols, we have: * `nvme_tcp_create_ctrl` * `nvmet_tcp_add_port` * `nvmet_tcp_accept_work` Next, the configurations we should care about: * `NVME_TCP` * `NVME_TARGET` * `NVME_TARGET_TCP` Now, let's dive into the core of the patch itself. It's modifying `drivers/nvme/host/tcp.c` and `drivers/nvme/target/tcp.c`. It's replacing direct socket option setting with `do_sock_setsockopt`. That's a significant functional change. It adds crucial error checking, and more importantly, it introduces the ability for BPF/LSM hooks to intercept and influence the socket option settings. This is *definitely* worth fuzzing. The patch is changing how the sockets are set up and that's an important change. Just to be absolutely certain, I double-checked if `do_sock_setsockopt` is exported, and yes, the grep output confirms `EXPORT_SYMBOL(do_sock_setsockopt);`. My Reasoning is that this patch replaces direct socket option assignments (things like `tcp_sock_set_syncnt` and `sock_no_linger`) with `do_sock_setsockopt()` in both the NVMe TCP host and target drivers. The significance is that `do_sock_setsockopt()` will invoke the LSM and BPF cgroup hooks (`security_socket_setsockopt` and `BPF_CGROUP_RUN_PROG_SETSOCKOPT`). This allows security modules and BPF programs to actively intercept, potentially modify, or flat-out deny these socket options. It also adds error handling, which could lead to queue allocation failing if setting the options fails. These changes directly impact how connections are established in NVMe over TCP, so fuzzing those paths is essential. My final consolidated view is: Configs: `NVME_TCP` `NVME_TARGET` `NVME_TARGET_TCP` FocusSymbols: `nvme_tcp_create_ctrl` `nvmet_tcp_add_port` `nvmet_tcp_accept_work` Let's call the set-results function. |
| 55/2 | 2026/08/18 06:37 | tool | set-results |
0mArgs:{
"EnableConfigs": [
"NVME_TCP",
"NVME_TARGET",
"NVME_TARGET_TCP"
],
"FocusSymbols": [
"nvme_tcp_create_ctrl",
"nvmet_tcp_add_port",
"nvmet_tcp_accept_work"
],
"Reasoning": "The patch replaces direct socket option assignments (e.g., tcp_sock_set_syncnt, sock_no_linger) with do_sock_setsockopt() in the NVMe TCP host and target drivers. This is a functional change because do_sock_setsockopt() invokes LSM and BPF cgroup hooks, allowing security modules and BPF programs to intercept, modify, or deny these socket options. It also adds error handling that fails queue allocation if setting the options fails. These changes affect the reachable connection setup paths in NVMe over TCP and should be fuzzed.",
"WorthFuzzing": true
}Results: {
"EnableConfigs": [
"NVME_TCP",
"NVME_TARGET",
"NVME_TARGET_TCP"
],
"FocusSymbols": [
"nvme_tcp_create_ctrl",
"nvmet_tcp_add_port",
"nvmet_tcp_accept_work"
],
"Reasoning": "The patch replaces direct socket option assignments (e.g., tcp_sock_set_syncnt, sock_no_linger) with do_sock_setsockopt() in the NVMe TCP host and target drivers. This is a functional change because do_sock_setsockopt() invokes LSM and BPF cgroup hooks, allowing security modules and BPF programs to intercept, modify, or deny these socket options. It also adds error handling that fails queue allocation if setting the options fails. These changes affect the reachable connection setup paths in NVMe over TCP and should be fuzzed.",
"WorthFuzzing": true
} |
| 56/1 | 2026/08/18 06:37 | action | If |
11mArgs:{
"WorthFuzzing": true
}Results: null |
| 57/2 | 2026/08/18 06:37 | agent | kmsan-evaluator |
11mModel:best-expensive Args: null Results: {
"KMSANReasoning": "The patch refactors socket option setting in the NVMe TCP host and target drivers by replacing direct calls to specific helpers (like `tcp_sock_set_nodelay`, `sock_no_linger`, etc.) with local wrapper functions that call `do_sock_setsockopt`. All local variables and structures passed to `do_sock_setsockopt` (e.g., `int val = 1;`, `struct linger ling = { .l_onoff = 1, .l_linger = 0 };`, or function arguments passed by value) are fully initialized before use. There are no uninitialized fields, no complex data structures with uninitialized padding, and no kernel-to-user info-leaks introduced by these changes. Any potential bugs introduced would be related to incorrect socket options or error handling, which are not uninitialized memory issues and do not require KMSAN. Standard testing and KASAN are sufficient.",
"NeedsKMSAN": false
}Instruction: You are an expert Linux kernel security engineer specializing in kernel memory
error detectors (KASAN and KMSAN). Your job is to review the provided patch series and
determine if the code changes justify spawning a dedicated KMSAN (KernelMemorySanitizer)
fuzzing session in addition to standard KASAN fuzzing.
CRITICAL DISTINCTION BETWEEN KASAN AND KMSAN:
- Standard KASAN kernel builds (upstream-apparmor-kasan.config) already enable
a comprehensive suite of debugging tools and sanitizers, including KASAN
(out-of-bounds accesses, use-after-free, double free, invalid free), LOCKDEP
(locking bugs and deadlocks), UB-sanitizers, and memory corruption checks.
- KMSAN (KernelMemorySanitizer) detects reads of UNINITIALIZED memory (stack, heap,
or page allocations) and kernel-to-user memory info-leaks.
Rule: THERE IS NO SENSE IN RUNNING A KMSAN SESSION IF A BUG CAN BE CAUGHT BY KASAN,
LOCKDEP, OR OTHER STANDARD BUG DETECTORS.
A dedicated KMSAN fuzzing session incurs significant resource costs. You must ONLY
set NeedsKMSAN=true if the code changes introduce or expose UNINITIALIZED MEMORY risks
that are detected ONLY by KMSAN.
Look holistically at the patch series and surrounding code. Even if no direct
uninitialized field accesses or new buffer allocations are added in the diff itself,
a patch may alter control flow, bounds checking, or data length calculations in ways
that change how the rest of the code operates on existing buffers (e.g. allowing
uninitialized stack/heap memory to be read, copied to user space, or used in control
flow). Do not hesitate to use your code access tools to inspect the surrounding code,
called functions, and callers.
Set NeedsKMSAN=true ONLY IF the patch introduces or modifies:
1. Kernel structures sent to user space (via copy_to_user, put_user, netlink skb
attributes, ioctl output arguments, socket options, or BPF buffers) where fields
or structure padding might not be fully initialized/zeroed.
2. Conditional logic or branching that depends on potentially uninitialized variables
or struct fields.
3. Allocation or initialization of complex data structures where uninitialized fields
could be read later in reachable code paths.
4. Bounds checks, lengths, or logic in a way that allows surrounding code to access
uninitialized bytes of existing buffers.
Set NeedsKMSAN=false IF:
- The code changes primarily risk out-of-bounds access, array overflows, NULL pointer
dereferences, locking deadlocks, or use-after-free bugs (these are already caught
by KASAN, LOCKDEP, or standard bug detectors).
- All stack/heap structures touched or introduced by the patch are fully zeroed
or initialized (e.g. using = {0}, memset, kzalloc) before being read or copied.
- The patch does not introduce any risk of uninitialized memory usage or info-leaks.
Use your code access tools to inspect the surrounding code if necessary, then provide
detailed KMSANReasoning contrasting KASAN vs KMSAN applicability for this patch.
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 75340f23186bf32c934b75b65e5d0af4043c0218
Author: syz-cluster <triage@syzkaller.com>
Date: Tue Aug 18 06:33:09 2026 +0000
syz-cluster: applied patch under review
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index ba5c7b3e2a7c6..5f30be04a9dde 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1774,6 +1774,58 @@ static int nvme_tcp_start_tls(struct nvme_ctrl *nctrl,
return ret;
}
+static int nvme_tcp_sock_no_linger(struct sock *sk)
+{
+ struct linger ling = { .l_onoff = 1, .l_linger = 0 };
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET, SO_LINGER,
+ KERNEL_SOCKPTR(&ling), sizeof(ling));
+}
+
+static int nvme_tcp_sock_set_priority(struct sock *sk, u32 priority)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET, SO_PRIORITY,
+ KERNEL_SOCKPTR(&priority), sizeof(priority));
+}
+
+static int nvme_tcp_sock_set_bindtodevice(struct sock *sk, char *iface)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET,
+ SO_BINDTODEVICE, KERNEL_SOCKPTR(iface),
+ strlen(iface));
+}
+
+static int nvme_tcp_sock_set_nodelay(struct sock *sk)
+{
+ int val = 1;
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_TCP, TCP_NODELAY,
+ KERNEL_SOCKPTR(&val), sizeof(val));
+}
+
+static int nvme_tcp_sock_set_syncnt(struct sock *sk, int val)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_TCP, TCP_SYNCNT,
+ KERNEL_SOCKPTR(&val), sizeof(val));
+}
+
+static int nvme_tcp_sock_set_tos(struct sock *sk, int tos)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_IP, IP_TOS,
+ KERNEL_SOCKPTR(&tos), sizeof(tos));
+}
+
+static int nvme_tcp_sock_set_tclass(struct sock *sk, int tclass)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6)
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_IPV6,
+ IPV6_TCLASS, KERNEL_SOCKPTR(&tclass),
+ sizeof(tclass));
+#endif
+ return 0;
+}
+
static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,
key_serial_t pskid)
{
@@ -1819,24 +1871,65 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,
#endif
/* Single syn retry */
- tcp_sock_set_syncnt(queue->sock->sk, 1);
+ ret = nvme_tcp_sock_set_syncnt(queue->sock->sk, 1);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set TCP_SYNCNT on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
/* Set TCP no delay */
- tcp_sock_set_nodelay(queue->sock->sk);
+ ret = nvme_tcp_sock_set_nodelay(queue->sock->sk);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set TCP_NODELAY on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
/*
* Cleanup whatever is sitting in the TCP transmit queue on socket
* close. This is done to prevent stale data from being sent should
* the network connection be restored before TCP times out.
*/
- sock_no_linger(queue->sock->sk);
+ ret = nvme_tcp_sock_no_linger(queue->sock->sk);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set SO_LINGER on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
- if (so_priority > 0)
- sock_set_priority(queue->sock->sk, so_priority);
+ if (so_priority > 0) {
+ ret = nvme_tcp_sock_set_priority(queue->sock->sk, so_priority);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set SO_PRIORITY on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
+ }
/* Set socket type of service */
- if (nctrl->opts->tos >= 0)
- ip_sock_set_tos(queue->sock->sk, nctrl->opts->tos);
+ if (nctrl->opts->tos >= 0) {
+ ret = nvme_tcp_sock_set_tos(queue->sock->sk, nctrl->opts->tos);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set IP_TOS on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
+
+ ret = nvme_tcp_sock_set_tclass(queue->sock->sk,
+ nctrl->opts->tos);
+ if (ret) {
+ dev_err(nctrl->device,
+ "failed to set IPV6_TCLASS on queue %d err %d\n",
+ qid, ret);
+ goto err_sock;
+ }
+ }
/* Set 10 seconds timeout for icresp recvmsg */
queue->sock->sk->sk_rcvtimeo = 10 * HZ;
@@ -1864,10 +1957,8 @@ static int nvme_tcp_alloc_queue(struct nvme_ctrl *nctrl, int qid,
if (nctrl->opts->mask & NVMF_OPT_HOST_IFACE) {
char *iface = nctrl->opts->host_iface;
- sockptr_t optval = KERNEL_SOCKPTR(iface);
- ret = sock_setsockopt(queue->sock, SOL_SOCKET, SO_BINDTODEVICE,
- optval, strlen(iface));
+ ret = nvme_tcp_sock_set_bindtodevice(queue->sock->sk, iface);
if (ret) {
dev_err(nctrl->device,
"failed to bind to interface %s queue %d err %d\n",
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index 75a276d73be3e..ed413aa5601c7 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -1696,10 +1696,66 @@ static void nvmet_tcp_state_change(struct sock *sk)
read_unlock_bh(&sk->sk_callback_lock);
}
+static int nvmet_tcp_sock_no_linger(struct sock *sk)
+{
+ struct linger ling = { .l_onoff = 1, .l_linger = 0 };
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET, SO_LINGER,
+ KERNEL_SOCKPTR(&ling), sizeof(ling));
+}
+
+static int nvmet_tcp_sock_set_priority(struct sock *sk, u32 priority)
+{
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET, SO_PRIORITY,
+ KERNEL_SOCKPTR(&priority), sizeof(priority));
+}
+
+static int nvmet_tcp_sock_set_reuseaddr(struct sock *sk)
+{
+ int val = SK_CAN_REUSE;
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_SOCKET,
+ SO_REUSEADDR, KERNEL_SOCKPTR(&val),
+ sizeof(val));
+}
+
+static int nvmet_tcp_sock_set_nodelay(struct sock *sk)
+{
+ int val = 1;
+
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_TCP, TCP_NODELAY,
+ KERNEL_SOCKPTR(&val), sizeof(val));
+}
+
+static int nvmet_tcp_sock_set_tos(struct sock *sk)
+{
+ int tos = inet_sk(sk)->rcv_tos;
+
+ if (tos > 0)
+ return do_sock_setsockopt(sk->sk_socket, false, SOL_IP, IP_TOS,
+ KERNEL_SOCKPTR(&tos), sizeof(tos));
+ return 0;
+}
+
+static int nvmet_tcp_sock_set_tclass(struct sock *sk)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6) {
+ int tclass = ip6_tclass(inet6_sk(sk)->rcv_flowinfo);
+
+ if (tclass > 0)
+ return do_sock_setsockopt(sk->sk_socket, false,
+ SOL_IPV6, IPV6_TCLASS,
+ KERNEL_SOCKPTR(&tclass),
+ sizeof(tclass));
+ }
+#endif
+ return 0;
+}
+
static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
{
struct socket *sock = queue->sock;
- struct inet_sock *inet = inet_sk(sock->sk);
int ret;
ret = kernel_getsockname(sock,
@@ -1717,14 +1773,24 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
* close. This is done to prevent stale data from being sent should
* the network connection be restored before TCP times out.
*/
- sock_no_linger(sock->sk);
+ ret = nvmet_tcp_sock_no_linger(sock->sk);
+ if (ret)
+ return ret;
- if (so_priority > 0)
- sock_set_priority(sock->sk, so_priority);
+ if (so_priority > 0) {
+ ret = nvmet_tcp_sock_set_priority(sock->sk, so_priority);
+ if (ret)
+ return ret;
+ }
/* Set socket type of service */
- if (inet->rcv_tos > 0)
- ip_sock_set_tos(sock->sk, inet->rcv_tos);
+ ret = nvmet_tcp_sock_set_tos(sock->sk);
+ if (ret)
+ return ret;
+
+ ret = nvmet_tcp_sock_set_tclass(sock->sk);
+ if (ret)
+ return ret;
ret = 0;
write_lock_bh(&sock->sk->sk_callback_lock);
@@ -2098,10 +2164,26 @@ static int nvmet_tcp_add_port(struct nvmet_port *nport)
port->sock->sk->sk_user_data = port;
port->data_ready = port->sock->sk->sk_data_ready;
port->sock->sk->sk_data_ready = nvmet_tcp_listen_data_ready;
- sock_set_reuseaddr(port->sock->sk);
- tcp_sock_set_nodelay(port->sock->sk);
- if (so_priority > 0)
- sock_set_priority(port->sock->sk, so_priority);
+ ret = nvmet_tcp_sock_set_reuseaddr(port->sock->sk);
+ if (ret) {
+ pr_err("failed to set SO_REUSEADDR on port socket %d\n", ret);
+ goto err_sock;
+ }
+
+ ret = nvmet_tcp_sock_set_nodelay(port->sock->sk);
+ if (ret) {
+ pr_err("failed to set TCP_NODELAY on port socket %d\n", ret);
+ goto err_sock;
+ }
+
+ if (so_priority > 0) {
+ ret = nvmet_tcp_sock_set_priority(port->sock->sk, so_priority);
+ if (ret) {
+ pr_err("failed to set SO_PRIORITY on port socket %d\n",
+ ret);
+ goto err_sock;
+ }
+ }
ret = kernel_bind(port->sock, (struct sockaddr_unsized *)&port->addr,
sizeof(port->addr));
|
| 58/3 | 2026/08/18 06:37 | llm | kmsan-evaluator |
11mModel:gemini-3.1-pro-preview Args: null Results: null Tokens: input: 5283 output: 222 thoughts: 1343 Thoughts: **Analyzing the NVMe TCP Socket Option Refactoring**
Alright, let's break this down. This patch is touching both the host and target TCP implementations within the NVMe drivers. Essentially, it's a refactoring, replacing direct calls to those specific socket option setting functions – things like `tcp_sock_set_nodelay` and `sock_no_linger` – with wrapper functions that uniformly use `do_sock_setsockopt`. The goal, I assume, is cleaner code and potentially easier maintenance by centralizing the socket option setting logic.
Now, the important part for us is whether this introduces any uninitialized memory concerns. I see these wrapper functions, and I'm walking through them. It's clear that all the variables passed to `do_sock_setsockopt` are *fully* initialized before being passed. We have `int val = 1;`, `struct linger ling = { .l_onoff = 1, .l_linger = 0 };`, and function arguments passed by value.
Specifically, that `linger` struct is something to double-check. So I'm pulling up the definition (most likely in `include/uapi/linux/socket.h`). Ah, yes, two ints, no padding. The other variables are simply integers or unsigned integers. No complex structures with uninitialized padding or the potential for information leakage from the kernel to user space.
The wrappers use `KERNEL_SOCKPTR` to create a `sockptr_t`, but this is a *kernel* pointer, and it's pointing to initialized data on the stack. There's zero chance of uninitialized memory being read or leaked to user space, which is what we are concerned about.
Essentially, all data passed to `do_sock_setsockopt` is initialized. These changes, at worst, could introduce bugs related to the *logic* of the socket options or error handling, which wouldn't be uninitialized memory issues. Standard testing and KASAN should be more than sufficient. Therefore, it's safe to say: `NeedsKMSAN = false`. We don't need KMSAN here; there's no risk of reading uninitialized memory.
|
| 59/3 | 2026/08/18 06:48 | tool | set-results |
0mArgs:{
"KMSANReasoning": "The patch refactors socket option setting in the NVMe TCP host and target drivers by replacing direct calls to specific helpers (like `tcp_sock_set_nodelay`, `sock_no_linger`, etc.) with local wrapper functions that call `do_sock_setsockopt`. All local variables and structures passed to `do_sock_setsockopt` (e.g., `int val = 1;`, `struct linger ling = { .l_onoff = 1, .l_linger = 0 };`, or function arguments passed by value) are fully initialized before use. There are no uninitialized fields, no complex data structures with uninitialized padding, and no kernel-to-user info-leaks introduced by these changes. Any potential bugs introduced would be related to incorrect socket options or error handling, which are not uninitialized memory issues and do not require KMSAN. Standard testing and KASAN are sufficient.",
"NeedsKMSAN": false
}Results: {
"KMSANReasoning": "The patch refactors socket option setting in the NVMe TCP host and target drivers by replacing direct calls to specific helpers (like `tcp_sock_set_nodelay`, `sock_no_linger`, etc.) with local wrapper functions that call `do_sock_setsockopt`. All local variables and structures passed to `do_sock_setsockopt` (e.g., `int val = 1;`, `struct linger ling = { .l_onoff = 1, .l_linger = 0 };`, or function arguments passed by value) are fully initialized before use. There are no uninitialized fields, no complex data structures with uninitialized padding, and no kernel-to-user info-leaks introduced by these changes. Any potential bugs introduced would be related to incorrect socket options or error handling, which are not uninitialized memory issues and do not require KMSAN. Standard testing and KASAN are sufficient.",
"NeedsKMSAN": false
} |
| Total Calls | Total Tokens | Avg Tokens | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|
| Total Calls | Total Duration (Seconds) | Avg Duration (Seconds) |
|---|