include/uapi/linux/cachefiles.h

Source file repositories/reference/linux-study-clean/include/uapi/linux/cachefiles.h

File Facts

System
Linux kernel
Corpus path
include/uapi/linux/cachefiles.h
Extension
.h
Size
1650 bytes
Lines
69
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

struct cachefiles_msg {
	__u32 msg_id;
	__u32 opcode;
	__u32 len;
	__u32 object_id;
	__u8  data[];
};

/*
 * @data contains the volume_key followed directly by the cookie_key. volume_key
 * is a NUL-terminated string; @volume_key_size indicates the size of the volume
 * key in bytes. cookie_key is binary data, which is netfs specific;
 * @cookie_key_size indicates the size of the cookie key in bytes.
 *
 * @fd identifies an anon_fd referring to the cache file.
 */
struct cachefiles_open {
	__u32 volume_key_size;
	__u32 cookie_key_size;
	__u32 fd;
	__u32 flags;
	__u8  data[];
};

/*
 * @off		indicates the starting offset of the requested file range
 * @len		indicates the length of the requested file range
 */
struct cachefiles_read {
	__u64 off;
	__u64 len;
};

/*
 * Reply for READ request
 * @arg for this ioctl is the @id field of READ request.
 */
#define CACHEFILES_IOC_READ_COMPLETE	_IOW(0x98, 1, int)

#endif

Annotation

Implementation Notes