fs/adfs/adfs.h

File Facts

System

Linux kernel

Corpus path

fs/adfs/adfs.h

Extension

.h

Size

6652 bytes

Lines

231

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: operation-table or driver-model contract

Status

pattern 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 an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/buffer_head.h
• linux/fs.h
• linux/adfs_fs.h

Detected Declarations

• struct adfs_inode_info
• struct adfs_discmap
• struct adfs_dir_ops
• struct adfs_sb_info
• struct adfs_dir
• struct object_info
• struct adfs_dir_ops
• struct adfs_discmap
• function adfs_filetype
• function adfs_inode_is_stamped
• function signed_asl
• function __adfs_block_map
• function adfs_disc_size

Annotated Snippet

extern const struct file_operations adfs_dir_operations;
extern const struct dentry_operations adfs_dentry_operations;
extern const struct adfs_dir_ops adfs_f_dir_ops;
extern const struct adfs_dir_ops adfs_fplus_dir_ops;

int adfs_dir_copyfrom(void *dst, struct adfs_dir *dir, unsigned int offset,
		      size_t len);
int adfs_dir_copyto(struct adfs_dir *dir, unsigned int offset, const void *src,
		    size_t len);
void adfs_dir_relse(struct adfs_dir *dir);
int adfs_dir_read_buffers(struct super_block *sb, u32 indaddr,
			  unsigned int size, struct adfs_dir *dir);
void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj);
extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
			   int wait);

/* file.c */
extern const struct inode_operations adfs_file_inode_operations;
extern const struct file_operations adfs_file_operations;

static inline __u32 signed_asl(__u32 val, signed int shift)
{
	if (shift >= 0)
		val <<= shift;
	else
		val >>= -shift;
	return val;
}

/*
 * Calculate the address of a block in an object given the block offset
 * and the object identity.
 *
 * The root directory ID should always be looked up in the map [3.4]
 */
static inline int __adfs_block_map(struct super_block *sb, u32 indaddr,
				   unsigned int block)
{
	if (indaddr & 255) {
		unsigned int off;

		off = (indaddr & 255) - 1;
		block += off << ADFS_SB(sb)->s_log2sharesize;
	}

	return adfs_map_lookup(sb, indaddr >> 8, block);
}

/* Return the disc record from the map */
static inline
struct adfs_discrecord *adfs_map_discrecord(struct adfs_discmap *dm)
{
	return (void *)(dm[0].dm_bh->b_data + 4);
}

static inline u64 adfs_disc_size(const struct adfs_discrecord *dr)
{
	return (u64)le32_to_cpu(dr->disc_size_high) << 32 |
		    le32_to_cpu(dr->disc_size);
}

Annotation

• Immediate include surface: `linux/buffer_head.h`, `linux/fs.h`, `linux/adfs_fs.h`.
• Detected declarations: `struct adfs_inode_info`, `struct adfs_discmap`, `struct adfs_dir_ops`, `struct adfs_sb_info`, `struct adfs_dir`, `struct object_info`, `struct adfs_dir_ops`, `struct adfs_discmap`, `function adfs_filetype`, `function adfs_inode_is_stamped`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: pattern 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.