include/linux/filelock.h

Source file repositories/reference/linux-study-clean/include/linux/filelock.h

File Facts

System
Linux kernel
Corpus path
include/linux/filelock.h
Extension
.h
Size
16353 bytes
Lines
617
Domain
Core OS
Bucket
Core Kernel Interface
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.

Dependency Surface

Detected Declarations

Annotated Snippet

static inline bool locks_can_async_lock(const struct file_operations *fops)
{
	return !fops->lock || fops->fop_flags & FOP_ASYNC_LOCK;
}

/* fs/locks.c */
void locks_free_lock_context(struct inode *inode);
void locks_free_lock(struct file_lock *fl);
void locks_init_lock(struct file_lock *);
struct file_lock *locks_alloc_lock(void);
void locks_copy_lock(struct file_lock *, struct file_lock *);
void locks_copy_conflock(struct file_lock *, struct file_lock *);
void locks_remove_posix(struct file *, fl_owner_t);
void locks_remove_file(struct file *);
void locks_release_private(struct file_lock *);
void posix_test_lock(struct file *, struct file_lock *);
int posix_lock_file(struct file *, struct file_lock *, struct file_lock *);
int locks_delete_block(struct file_lock *);
int vfs_test_lock(struct file *, struct file_lock *);
int vfs_lock_file(struct file *, unsigned int, struct file_lock *, struct file_lock *);
int vfs_cancel_lock(struct file *filp, struct file_lock *fl);
bool vfs_inode_has_locks(struct inode *inode);
int locks_lock_inode_wait(struct inode *inode, struct file_lock *fl);

void locks_init_lease(struct file_lease *);
void locks_free_lease(struct file_lease *fl);
struct file_lease *locks_alloc_lease(void);
int __break_lease(struct inode *inode, unsigned int flags);
void lease_get_mtime(struct inode *, struct timespec64 *time);
int generic_setlease(struct file *, int, struct file_lease **, void **priv);
int kernel_setlease(struct file *, int, struct file_lease **, void **);
int vfs_setlease(struct file *, int, struct file_lease **, void **);
int lease_modify(struct file_lease *, int, struct list_head *);
u32 inode_lease_ignore_mask(struct inode *inode);

struct notifier_block;
int lease_register_notifier(struct notifier_block *);
void lease_unregister_notifier(struct notifier_block *);

struct files_struct;
void show_fd_locks(struct seq_file *f,
			 struct file *filp, struct files_struct *files);
bool locks_owner_has_blockers(struct file_lock_context *flctx,
			fl_owner_t owner);

static inline struct file_lock_context *
locks_inode_context(const struct inode *inode)
{
	/*
	 * Paired with smp_store_release in locks_get_lock_context().
	 *
	 * Ensures ->i_flctx will be visible if we spotted the flag.
	 */
	if (likely(!(smp_load_acquire(&inode->i_opflags) & IOP_FLCTX)))
		return NULL;
	return READ_ONCE(inode->i_flctx);
}

#else /* !CONFIG_FILE_LOCKING */
static inline int fcntl_getlk(struct file *file, unsigned int cmd,
			      struct flock __user *user)
{
	return -EINVAL;
}

static inline int fcntl_setlk(unsigned int fd, struct file *file,
			      unsigned int cmd, struct flock __user *user)
{
	return -EACCES;
}

#if BITS_PER_LONG == 32
static inline int fcntl_getlk64(struct file *file, unsigned int cmd,
				struct flock64 *user)
{
	return -EINVAL;
}

static inline int fcntl_setlk64(unsigned int fd, struct file *file,
				unsigned int cmd, struct flock64 *user)
{
	return -EACCES;
}
#endif
static inline int fcntl_setlease(unsigned int fd, struct file *filp, int arg)
{
	return -EINVAL;
}

static inline int fcntl_getlease(struct file *filp)

Annotation

Implementation Notes