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.

Dependency Surface

Detected Declarations

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

Implementation Notes