fs/coda/coda_linux.h

File Facts

System

Linux kernel

Corpus path

fs/coda/coda_linux.h

Extension

.h

Size

2753 bytes

Lines

96

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/kernel.h
• linux/param.h
• linux/mm.h
• linux/vmalloc.h
• linux/slab.h
• linux/wait.h
• linux/types.h
• linux/fs.h
• coda_fs_i.h

Detected Declarations

• function coda_flag_inode

Annotated Snippet

extern const struct file_operations coda_dir_operations;
extern const struct file_operations coda_file_operations;
extern const struct file_operations coda_ioctl_operations;

/* operations shared over more than one file */
int coda_open(struct inode *i, struct file *f);
int coda_release(struct inode *i, struct file *f);
int coda_permission(struct mnt_idmap *idmap, struct inode *inode,
		    int mask);
int coda_revalidate_inode(struct inode *);
int coda_getattr(struct mnt_idmap *, const struct path *, struct kstat *,
		 u32, unsigned int);
int coda_setattr(struct mnt_idmap *, struct dentry *, struct iattr *);

/* this file:  helpers */
char *coda_f2s(struct CodaFid *f);
int coda_iscontrol(const char *name, size_t length);

umode_t coda_inode_type(struct coda_vattr *attr);
void coda_vattr_to_iattr(struct inode *, struct coda_vattr *);
void coda_iattr_to_vattr(struct iattr *, struct coda_vattr *);
unsigned short coda_flags_to_cflags(unsigned short);

/* inode to cnode access functions */

static inline struct coda_inode_info *ITOC(struct inode *inode)
{
	return container_of(inode, struct coda_inode_info, vfs_inode);
}

static __inline__ struct CodaFid *coda_i2f(struct inode *inode)
{
	return &(ITOC(inode)->c_fid);
}

static __inline__ char *coda_i2s(struct inode *inode)
{
	return coda_f2s(&(ITOC(inode)->c_fid));
}

/* this will not zap the inode away */
static __inline__ void coda_flag_inode(struct inode *inode, int flag)
{
	struct coda_inode_info *cii = ITOC(inode);

	if (!inode)
		return;

	spin_lock(&cii->c_lock);
	cii->c_flags |= flag;
	spin_unlock(&cii->c_lock);
}		

#endif

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/param.h`, `linux/mm.h`, `linux/vmalloc.h`, `linux/slab.h`, `linux/wait.h`, `linux/types.h`, `linux/fs.h`.
• Detected declarations: `function coda_flag_inode`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.