lib/fault-inject-usercopy.c
Source file repositories/reference/linux-study-clean/lib/fault-inject-usercopy.c
File Facts
- System
- Linux kernel
- Corpus path
lib/fault-inject-usercopy.c- Extension
.c- Size
- 801 bytes
- Lines
- 38
- Domain
- Kernel Services
- Bucket
- lib
- Inferred role
- Kernel Services: exported/initcall integration point
- Status
- integration implementation candidate
Why This File Exists
Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
- Shared kernel service surface used by multiple subsystems, including helpers, cryptography, virtualization support, and async I/O infrastructure.
- Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/fault-inject.hlinux/fault-inject-usercopy.h
Detected Declarations
function setup_fail_usercopyfunction fail_usercopy_debugfsfunction should_fail_usercopyexport should_fail_usercopy
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/fault-inject.h>
#include <linux/fault-inject-usercopy.h>
static struct {
struct fault_attr attr;
} fail_usercopy = {
.attr = FAULT_ATTR_INITIALIZER,
};
static int __init setup_fail_usercopy(char *str)
{
return setup_fault_attr(&fail_usercopy.attr, str);
}
__setup("fail_usercopy=", setup_fail_usercopy);
#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
static int __init fail_usercopy_debugfs(void)
{
struct dentry *dir;
dir = fault_create_debugfs_attr("fail_usercopy", NULL,
&fail_usercopy.attr);
return PTR_ERR_OR_ZERO(dir);
}
late_initcall(fail_usercopy_debugfs);
#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
bool should_fail_usercopy(void)
{
return should_fail(&fail_usercopy.attr, 1);
}
EXPORT_SYMBOL_GPL(should_fail_usercopy);
Annotation
- Immediate include surface: `linux/fault-inject.h`, `linux/fault-inject-usercopy.h`.
- Detected declarations: `function setup_fail_usercopy`, `function fail_usercopy_debugfs`, `function should_fail_usercopy`, `export should_fail_usercopy`.
- Atlas domain: Kernel Services / lib.
- Implementation status: integration implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.