include/linux/backing-file.h
Source file repositories/reference/linux-study-clean/include/linux/backing-file.h
File Facts
- System
- Linux kernel
- Corpus path
include/linux/backing-file.h- Extension
.h- Size
- 1545 bytes
- Lines
- 45
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/file.hlinux/uio.hlinux/fs.h
Detected Declarations
struct backing_file_ctx
Annotated Snippet
struct backing_file_ctx {
const struct cred *cred;
void (*accessed)(struct file *file);
void (*end_write)(struct kiocb *iocb, ssize_t);
};
struct file *backing_file_open(const struct file *user_file, int flags,
const struct path *real_path,
const struct cred *cred);
struct file *backing_tmpfile_open(const struct file *user_file, int flags,
const struct path *real_parentpath,
umode_t mode, const struct cred *cred);
ssize_t backing_file_read_iter(struct file *file, struct iov_iter *iter,
struct kiocb *iocb, int flags,
struct backing_file_ctx *ctx);
ssize_t backing_file_write_iter(struct file *file, struct iov_iter *iter,
struct kiocb *iocb, int flags,
struct backing_file_ctx *ctx);
ssize_t backing_file_splice_read(struct file *in, struct kiocb *iocb,
struct pipe_inode_info *pipe, size_t len,
unsigned int flags,
struct backing_file_ctx *ctx);
ssize_t backing_file_splice_write(struct pipe_inode_info *pipe,
struct file *out, struct kiocb *iocb,
size_t len, unsigned int flags,
struct backing_file_ctx *ctx);
int backing_file_mmap(struct file *file, struct vm_area_struct *vma,
struct backing_file_ctx *ctx);
#endif /* _LINUX_BACKING_FILE_H */
Annotation
- Immediate include surface: `linux/file.h`, `linux/uio.h`, `linux/fs.h`.
- Detected declarations: `struct backing_file_ctx`.
- 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.