include/linux/devcoredump.h
Source file repositories/reference/linux-study-clean/include/linux/devcoredump.h
File Facts
- System
- Linux kernel
- Corpus path
include/linux/devcoredump.h- Extension
.h- Size
- 3614 bytes
- Lines
- 127
- Domain
- Core OS
- Bucket
- Core Kernel Interface
- Inferred role
- Core OS: implementation source
- Status
- source implementation candidate
Why This File Exists
Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
- Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
- Allocates kernel memory; connect allocation flags and lifetime to context constraints.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/device.hlinux/module.hlinux/vmalloc.hlinux/scatterlist.hlinux/slab.h
Detected Declarations
function Copyrightfunction dev_coredumpvfunction dev_coredumpm_timeoutfunction dev_coredumpsgfunction dev_coredump_put
Annotated Snippet
if (sg_is_chain(iter)) {
iter = sg_chain_ptr(iter);
kfree(delete_iter);
delete_iter = iter;
}
}
/* free the last table */
kfree(delete_iter);
}
#ifdef CONFIG_DEV_COREDUMP
void dev_coredumpv(struct device *dev, void *data, size_t datalen,
gfp_t gfp);
void dev_coredumpm_timeout(struct device *dev, struct module *owner,
void *data, size_t datalen, gfp_t gfp,
ssize_t (*read)(char *buffer, loff_t offset,
size_t count, void *data,
size_t datalen),
void (*free)(void *data),
unsigned long timeout);
void dev_coredumpsg(struct device *dev, struct scatterlist *table,
size_t datalen, gfp_t gfp);
void dev_coredump_put(struct device *dev);
#else
static inline void dev_coredumpv(struct device *dev, void *data,
size_t datalen, gfp_t gfp)
{
vfree(data);
}
static inline void
dev_coredumpm_timeout(struct device *dev, struct module *owner,
void *data, size_t datalen, gfp_t gfp,
ssize_t (*read)(char *buffer, loff_t offset,
size_t count, void *data,
size_t datalen),
void (*free)(void *data),
unsigned long timeout)
{
free(data);
}
static inline void dev_coredumpsg(struct device *dev, struct scatterlist *table,
size_t datalen, gfp_t gfp)
{
_devcd_free_sgtable(table);
}
static inline void dev_coredump_put(struct device *dev)
{
}
#endif /* CONFIG_DEV_COREDUMP */
/**
* dev_coredumpm - create device coredump with read/free methods
* @dev: the struct device for the crashed device
* @owner: the module that contains the read/free functions, use %THIS_MODULE
* @data: data cookie for the @read/@free functions
* @datalen: length of the data
* @gfp: allocation flags
* @read: function to read from the given buffer
* @free: function to free the given buffer
*
* Creates a new device coredump for the given device. If a previous one hasn't
* been read yet, the new coredump is discarded. The data lifetime is determined
* by the device coredump framework and when it is no longer needed the @free
* function will be called to free the data.
*/
static inline void dev_coredumpm(struct device *dev, struct module *owner,
void *data, size_t datalen, gfp_t gfp,
ssize_t (*read)(char *buffer, loff_t offset, size_t count,
void *data, size_t datalen),
void (*free)(void *data))
{
dev_coredumpm_timeout(dev, owner, data, datalen, gfp, read, free,
DEVCD_TIMEOUT);
}
#endif /* __DEVCOREDUMP_H */
Annotation
- Immediate include surface: `linux/device.h`, `linux/module.h`, `linux/vmalloc.h`, `linux/scatterlist.h`, `linux/slab.h`.
- Detected declarations: `function Copyright`, `function dev_coredumpv`, `function dev_coredumpm_timeout`, `function dev_coredumpsg`, `function dev_coredump_put`.
- Atlas domain: Core OS / Core Kernel Interface.
- Implementation status: source 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.