fs/squashfs/decompressor.h

File Facts

System

Linux kernel

Corpus path

fs/squashfs/decompressor.h

Extension

.h

Size

1374 bytes

Lines

55

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

• linux/bio.h

Detected Declarations

• struct squashfs_decompressor

Annotated Snippet

struct squashfs_decompressor {
	void	*(*init)(struct squashfs_sb_info *, void *);
	void	*(*comp_opts)(struct squashfs_sb_info *, void *, int);
	void	(*free)(void *);
	int	(*decompress)(struct squashfs_sb_info *, void *,
		struct bio *, int, int, struct squashfs_page_actor *);
	int	id;
	char	*name;
	int	alloc_buffer;
	int	supported;
};

static inline void *squashfs_comp_opts(struct squashfs_sb_info *msblk,
							void *buff, int length)
{
	return msblk->decompressor->comp_opts ?
		msblk->decompressor->comp_opts(msblk, buff, length) : NULL;
}

#ifdef CONFIG_SQUASHFS_XZ
extern const struct squashfs_decompressor squashfs_xz_comp_ops;
#endif

#ifdef CONFIG_SQUASHFS_LZ4
extern const struct squashfs_decompressor squashfs_lz4_comp_ops;
#endif

#ifdef CONFIG_SQUASHFS_LZO
extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
#endif

#ifdef CONFIG_SQUASHFS_ZLIB
extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
#endif

#ifdef CONFIG_SQUASHFS_ZSTD
extern const struct squashfs_decompressor squashfs_zstd_comp_ops;
#endif

#endif

Annotation

• Immediate include surface: `linux/bio.h`.
• Detected declarations: `struct squashfs_decompressor`.
• 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.