fs/xfs/libxfs/xfs_metafile.h

File Facts

System

Linux kernel

Corpus path

fs/xfs/libxfs/xfs_metafile.h

Extension

.h

Size

1599 bytes

Lines

45

Domain

Core OS

Bucket

VFS And Filesystem Core

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

• No C-style include directives detected by the generator.

Detected Declarations

• struct xfs_alloc_arg

Annotated Snippet

#ifndef __XFS_METAFILE_H__
#define __XFS_METAFILE_H__

const char *xfs_metafile_type_str(enum xfs_metafile_type metatype);

/* All metadata files must have these flags set. */
#define XFS_METAFILE_DIFLAGS	(XFS_DIFLAG_IMMUTABLE | \
				 XFS_DIFLAG_SYNC | \
				 XFS_DIFLAG_NOATIME | \
				 XFS_DIFLAG_NODUMP | \
				 XFS_DIFLAG_NODEFRAG)

/* All metadata directories must have these flags set. */
#define XFS_METADIR_DIFLAGS	(XFS_METAFILE_DIFLAGS | \
				 XFS_DIFLAG_NOSYMLINKS)

void xfs_metafile_set_iflag(struct xfs_trans *tp, struct xfs_inode *ip,
		enum xfs_metafile_type metafile_type);
void xfs_metafile_clear_iflag(struct xfs_trans *tp, struct xfs_inode *ip);

/* Space reservations for metadata inodes. */
struct xfs_alloc_arg;

bool xfs_metafile_resv_critical(struct xfs_mount *mp);
void xfs_metafile_resv_alloc_space(struct xfs_inode *ip,
		struct xfs_alloc_arg *args);
void xfs_metafile_resv_free_space(struct xfs_inode *ip, struct xfs_trans *tp,
		xfs_filblks_t len);
void xfs_metafile_resv_free(struct xfs_mount *mp);
int xfs_metafile_resv_init(struct xfs_mount *mp);

/* Code specific to kernel/userspace; must be provided externally. */

int xfs_trans_metafile_iget(struct xfs_trans *tp, xfs_ino_t ino,
		enum xfs_metafile_type metafile_type, struct xfs_inode **ipp);
int xfs_metafile_iget(struct xfs_mount *mp, xfs_ino_t ino,
		enum xfs_metafile_type metafile_type, struct xfs_inode **ipp);

#endif /* __XFS_METAFILE_H__ */

Annotation

• Detected declarations: `struct xfs_alloc_arg`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• 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.