ftrace: Synchronize the initialization of ftrace_opsgrafted

There's some internal state that ftrace_ops needs to have set, but since
it can be declared outside of the ftrace.c code, it calls
ftrace_ops_init() on the ops in every global function. The issue is that
if two tasks call it on the same ops at the same time it is possible to
have the initialization of one corrupt the initialization of the other
call.

Create a ops_mutex to use to synchronize every initialization of the
ftrace_ops. The mutex is taken within checking the ftrace_ops flag that
states it was initializied but the flag is checked again after the mutex
has been taken. Checking first outside the mutex allows it to shortcut
having to take the mutex. But then the check needs to be done again after
the mute is taken in case of races.

Cc: stable@vger.kernel.org
Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home
Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock")
Reported-by: sashiko-bot@kernel.org
Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 203 insertions, 0 deletions

diff --git a/drivers/nvme/host/constants.c b/drivers/nvme/host/constants.c
new file mode 100644
index 000000000..dc90df9e1
--- /dev/null
+++ b/drivers/nvme/host/constants.c
@@ -0,0 +1,203 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * NVM Express device driver verbose errors
+ * Copyright (c) 2022, Oracle and/or its affiliates
+ */
+
+#include "nvme.h"
+
+static const char * const nvme_ops[] = {
+	[nvme_cmd_flush] = "Flush",
+	[nvme_cmd_write] = "Write",
+	[nvme_cmd_read] = "Read",
+	[nvme_cmd_write_uncor] = "Write Uncorrectable",
+	[nvme_cmd_compare] = "Compare",
+	[nvme_cmd_write_zeroes] = "Write Zeroes",
+	[nvme_cmd_dsm] = "Dataset Management",
+	[nvme_cmd_verify] = "Verify",
+	[nvme_cmd_resv_register] = "Reservation Register",
+	[nvme_cmd_resv_report] = "Reservation Report",
+	[nvme_cmd_resv_acquire] = "Reservation Acquire",
+	[nvme_cmd_resv_release] = "Reservation Release",
+	[nvme_cmd_zone_mgmt_send] = "Zone Management Send",
+	[nvme_cmd_zone_mgmt_recv] = "Zone Management Receive",
+	[nvme_cmd_zone_append] = "Zone Append",
+};
+
+static const char * const nvme_admin_ops[] = {
+	[nvme_admin_delete_sq] = "Delete SQ",
+	[nvme_admin_create_sq] = "Create SQ",
+	[nvme_admin_get_log_page] = "Get Log Page",
+	[nvme_admin_delete_cq] = "Delete CQ",
+	[nvme_admin_create_cq] = "Create CQ",
+	[nvme_admin_identify] = "Identify",
+	[nvme_admin_abort_cmd] = "Abort Command",
+	[nvme_admin_set_features] = "Set Features",
+	[nvme_admin_get_features] = "Get Features",
+	[nvme_admin_async_event] = "Async Event",
+	[nvme_admin_ns_mgmt] = "Namespace Management",
+	[nvme_admin_activate_fw] = "Activate Firmware",
+	[nvme_admin_download_fw] = "Download Firmware",
+	[nvme_admin_dev_self_test] = "Device Self Test",
+	[nvme_admin_ns_attach] = "Namespace Attach",
+	[nvme_admin_keep_alive] = "Keep Alive",
+	[nvme_admin_directive_send] = "Directive Send",
+	[nvme_admin_directive_recv] = "Directive Receive",
+	[nvme_admin_virtual_mgmt] = "Virtual Management",
+	[nvme_admin_nvme_mi_send] = "NVMe Send MI",
+	[nvme_admin_nvme_mi_recv] = "NVMe Receive MI",
+	[nvme_admin_dbbuf] = "Doorbell Buffer Config",
+	[nvme_admin_format_nvm] = "Format NVM",
+	[nvme_admin_security_send] = "Security Send",
+	[nvme_admin_security_recv] = "Security Receive",
+	[nvme_admin_sanitize_nvm] = "Sanitize NVM",
+	[nvme_admin_get_lba_status] = "Get LBA Status",
+};
+
+static const char * const nvme_fabrics_ops[] = {
+	[nvme_fabrics_type_property_set] = "Property Set",
+	[nvme_fabrics_type_property_get] = "Property Get",
+	[nvme_fabrics_type_connect] = "Connect",
+	[nvme_fabrics_type_auth_send] = "Authentication Send",
+	[nvme_fabrics_type_auth_receive] = "Authentication Receive",
+};
+
+static const char * const nvme_statuses[] = {
+	[NVME_SC_SUCCESS] = "Success",
+	[NVME_SC_INVALID_OPCODE] = "Invalid Command Opcode",
+	[NVME_SC_INVALID_FIELD] = "Invalid Field in Command",
+	[NVME_SC_CMDID_CONFLICT] = "Command ID Conflict",
+	[NVME_SC_DATA_XFER_ERROR] = "Data Transfer Error",
+	[NVME_SC_POWER_LOSS] = "Commands Aborted due to Power Loss Notification",
+	[NVME_SC_INTERNAL] = "Internal Error",
+	[NVME_SC_ABORT_REQ] = "Command Abort Requested",
+	[NVME_SC_ABORT_QUEUE] = "Command Aborted due to SQ Deletion",
+	[NVME_SC_FUSED_FAIL] = "Command Aborted due to Failed Fused Command",
+	[NVME_SC_FUSED_MISSING] = "Command Aborted due to Missing Fused Command",
+	[NVME_SC_INVALID_NS] = "Invalid Namespace or Format",
+	[NVME_SC_CMD_SEQ_ERROR] = "Command Sequence Error",
+	[NVME_SC_SGL_INVALID_LAST] = "Invalid SGL Segment Descriptor",
+	[NVME_SC_SGL_INVALID_COUNT] = "Invalid Number of SGL Descriptors",
+	[NVME_SC_SGL_INVALID_DATA] = "Data SGL Length Invalid",
+	[NVME_SC_SGL_INVALID_METADATA] = "Metadata SGL Length Invalid",
+	[NVME_SC_SGL_INVALID_TYPE] = "SGL Descriptor Type Invalid",
+	[NVME_SC_CMB_INVALID_USE] = "Invalid Use of Controller Memory Buffer",
+	[NVME_SC_PRP_INVALID_OFFSET] = "PRP Offset Invalid",
+	[NVME_SC_ATOMIC_WU_EXCEEDED] = "Atomic Write Unit Exceeded",
+	[NVME_SC_OP_DENIED] = "Operation Denied",
+	[NVME_SC_SGL_INVALID_OFFSET] = "SGL Offset Invalid",
+	[NVME_SC_RESERVED] = "Reserved",
+	[NVME_SC_HOST_ID_INCONSIST] = "Host Identifier Inconsistent Format",
+	[NVME_SC_KA_TIMEOUT_EXPIRED] = "Keep Alive Timeout Expired",
+	[NVME_SC_KA_TIMEOUT_INVALID] = "Keep Alive Timeout Invalid",
+	[NVME_SC_ABORTED_PREEMPT_ABORT] = "Command Aborted due to Preempt and Abort",
+	[NVME_SC_SANITIZE_FAILED] = "Sanitize Failed",
+	[NVME_SC_SANITIZE_IN_PROGRESS] = "Sanitize In Progress",
+	[NVME_SC_SGL_INVALID_GRANULARITY] = "SGL Data Block Granularity Invalid",
+	[NVME_SC_CMD_NOT_SUP_CMB_QUEUE] = "Command Not Supported for Queue in CMB",
+	[NVME_SC_NS_WRITE_PROTECTED] = "Namespace is Write Protected",
+	[NVME_SC_CMD_INTERRUPTED] = "Command Interrupted",
+	[NVME_SC_TRANSIENT_TR_ERR] = "Transient Transport Error",
+	[NVME_SC_ADMIN_COMMAND_MEDIA_NOT_READY] = "Admin Command Media Not Ready",
+	[NVME_SC_INVALID_IO_CMD_SET] = "Invalid IO Command Set",
+	[NVME_SC_LBA_RANGE] = "LBA Out of Range",
+	[NVME_SC_CAP_EXCEEDED] = "Capacity Exceeded",
+	[NVME_SC_NS_NOT_READY] = "Namespace Not Ready",
+	[NVME_SC_RESERVATION_CONFLICT] = "Reservation Conflict",
+	[NVME_SC_FORMAT_IN_PROGRESS] = "Format In Progress",
+	[NVME_SC_CQ_INVALID] = "Completion Queue Invalid",
+	[NVME_SC_QID_INVALID] = "Invalid Queue Identifier",
+	[NVME_SC_QUEUE_SIZE] = "Invalid Queue Size",
+	[NVME_SC_ABORT_LIMIT] = "Abort Command Limit Exceeded",
+	[NVME_SC_ABORT_MISSING] = "Reserved", /* XXX */
+	[NVME_SC_ASYNC_LIMIT] = "Asynchronous Event Request Limit Exceeded",
+	[NVME_SC_FIRMWARE_SLOT] = "Invalid Firmware Slot",
+	[NVME_SC_FIRMWARE_IMAGE] = "Invalid Firmware Image",
+	[NVME_SC_INVALID_VECTOR] = "Invalid Interrupt Vector",
+	[NVME_SC_INVALID_LOG_PAGE] = "Invalid Log Page",
+	[NVME_SC_INVALID_FORMAT] = "Invalid Format",
+	[NVME_SC_FW_NEEDS_CONV_RESET] = "Firmware Activation Requires Conventional Reset",
+	[NVME_SC_INVALID_QUEUE] = "Invalid Queue Deletion",
+	[NVME_SC_FEATURE_NOT_SAVEABLE] = "Feature Identifier Not Saveable",
+	[NVME_SC_FEATURE_NOT_CHANGEABLE] = "Feature Not Changeable",
+	[NVME_SC_FEATURE_NOT_PER_NS] = "Feature Not Namespace Specific",
+	[NVME_SC_FW_NEEDS_SUBSYS_RESET] = "Firmware Activation Requires NVM Subsystem Reset",
+	[NVME_SC_FW_NEEDS_RESET] = "Firmware Activation Requires Reset",
+	[NVME_SC_FW_NEEDS_MAX_TIME] = "Firmware Activation Requires Maximum Time Violation",
+	[NVME_SC_FW_ACTIVATE_PROHIBITED] = "Firmware Activation Prohibited",
+	[NVME_SC_OVERLAPPING_RANGE] = "Overlapping Range",
+	[NVME_SC_NS_INSUFFICIENT_CAP] = "Namespace Insufficient Capacity",
+	[NVME_SC_NS_ID_UNAVAILABLE] = "Namespace Identifier Unavailable",
+	[NVME_SC_NS_ALREADY_ATTACHED] = "Namespace Already Attached",
+	[NVME_SC_NS_IS_PRIVATE] = "Namespace Is Private",
+	[NVME_SC_NS_NOT_ATTACHED] = "Namespace Not Attached",
+	[NVME_SC_THIN_PROV_NOT_SUPP] = "Thin Provisioning Not Supported",
+	[NVME_SC_CTRL_LIST_INVALID] = "Controller List Invalid",
+	[NVME_SC_SELF_TEST_IN_PROGRESS] = "Device Self-test In Progress",
+	[NVME_SC_BP_WRITE_PROHIBITED] = "Boot Partition Write Prohibited",
+	[NVME_SC_CTRL_ID_INVALID] = "Invalid Controller Identifier",
+	[NVME_SC_SEC_CTRL_STATE_INVALID] = "Invalid Secondary Controller State",
+	[NVME_SC_CTRL_RES_NUM_INVALID] = "Invalid Number of Controller Resources",
+	[NVME_SC_RES_ID_INVALID] = "Invalid Resource Identifier",
+	[NVME_SC_PMR_SAN_PROHIBITED] = "Sanitize Prohibited",
+	[NVME_SC_ANA_GROUP_ID_INVALID] = "ANA Group Identifier Invalid",
+	[NVME_SC_ANA_ATTACH_FAILED] = "ANA Attach Failed",
+	[NVME_SC_BAD_ATTRIBUTES] = "Conflicting Attributes",
+	[NVME_SC_INVALID_PI] = "Invalid Protection Information",
+	[NVME_SC_READ_ONLY] = "Attempted Write to Read Only Range",
+	[NVME_SC_CMD_SIZE_LIM_EXCEEDED] = "Command Size Limits Exceeded",
+	[NVME_SC_ZONE_BOUNDARY_ERROR] = "Zoned Boundary Error",
+	[NVME_SC_ZONE_FULL] = "Zone Is Full",
+	[NVME_SC_ZONE_READ_ONLY] = "Zone Is Read Only",
+	[NVME_SC_ZONE_OFFLINE] = "Zone Is Offline",
+	[NVME_SC_ZONE_INVALID_WRITE] = "Zone Invalid Write",
+	[NVME_SC_ZONE_TOO_MANY_ACTIVE] = "Too Many Active Zones",
+	[NVME_SC_ZONE_TOO_MANY_OPEN] = "Too Many Open Zones",
+	[NVME_SC_ZONE_INVALID_TRANSITION] = "Invalid Zone State Transition",
+	[NVME_SC_WRITE_FAULT] = "Write Fault",
+	[NVME_SC_READ_ERROR] = "Unrecovered Read Error",
+	[NVME_SC_GUARD_CHECK] = "End-to-end Guard Check Error",
+	[NVME_SC_APPTAG_CHECK] = "End-to-end Application Tag Check Error",
+	[NVME_SC_REFTAG_CHECK] = "End-to-end Reference Tag Check Error",
+	[NVME_SC_COMPARE_FAILED] = "Compare Failure",
+	[NVME_SC_ACCESS_DENIED] = "Access Denied",
+	[NVME_SC_UNWRITTEN_BLOCK] = "Deallocated or Unwritten Logical Block",
+	[NVME_SC_INTERNAL_PATH_ERROR] = "Internal Pathing Error",
+	[NVME_SC_ANA_PERSISTENT_LOSS] = "Asymmetric Access Persistent Loss",
+	[NVME_SC_ANA_INACCESSIBLE] = "Asymmetric Access Inaccessible",
+	[NVME_SC_ANA_TRANSITION] = "Asymmetric Access Transition",
+	[NVME_SC_CTRL_PATH_ERROR] = "Controller Pathing Error",
+	[NVME_SC_HOST_PATH_ERROR] = "Host Pathing Error",
+	[NVME_SC_HOST_ABORTED_CMD] = "Host Aborted Command",
+};
+
+const char *nvme_get_error_status_str(u16 status)
+{
+	status &= NVME_SCT_SC_MASK;
+	if (status < ARRAY_SIZE(nvme_statuses) && nvme_statuses[status])
+		return nvme_statuses[status];
+	return "Unknown";
+}
+
+const char *nvme_get_opcode_str(u8 opcode)
+{
+	if (opcode < ARRAY_SIZE(nvme_ops) && nvme_ops[opcode])
+		return nvme_ops[opcode];
+	return "Unknown";
+}
+EXPORT_SYMBOL_GPL(nvme_get_opcode_str);
+
+const char *nvme_get_admin_opcode_str(u8 opcode)
+{
+	if (opcode < ARRAY_SIZE(nvme_admin_ops) && nvme_admin_ops[opcode])
+		return nvme_admin_ops[opcode];
+	return "Unknown";
+}
+EXPORT_SYMBOL_GPL(nvme_get_admin_opcode_str);
+
+const char *nvme_get_fabrics_opcode_str(u8 opcode) {
+	if (opcode < ARRAY_SIZE(nvme_fabrics_ops) && nvme_fabrics_ops[opcode])
+		return nvme_fabrics_ops[opcode];
+	return "Unknown";
+}
+EXPORT_SYMBOL_GPL(nvme_get_fabrics_opcode_str);