sys/zfs_rlock.h File Reference

#include <sys/zfs_znode.h>

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Data Structures
struct	rl
Typedefs
typedef struct rl	rl_t
Enumerations
enum	rl_type_t { RL_READER, RL_WRITER, RL_APPEND }
Functions
rl_t *	zfs_range_lock (znode_t *zp, uint64_t off, uint64_t len, rl_type_t type)
	Lock an object range.
void	zfs_range_unlock (rl_t *rl)
void	zfs_range_reduce (rl_t *rl, uint64_t off, uint64_t len)
	Unlock range and destroy range lock structure.
int	zfs_range_compare (const void *arg1, const void *arg2)
	AVL comparison function used to order range locks Locks are ordered on the start offset of the range.

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Typedef Documentation

typedef struct rl rl_t

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Enumeration Type Documentation

enum rl_type_t

Enumerator:

RL_READER
RL_WRITER
RL_APPEND

Definition at line 39 of file zfs_rlock.h.

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Function Documentation

int zfs_range_compare	(	const void *	arg1,
		const void *	arg2
	)

AVL comparison function used to order range locks Locks are ordered on the start offset of the range.

Definition at line 585 of file zfs_rlock.c.

rl_t* zfs_range_lock	(	znode_t *	zp,
		uint64_t	off,
		uint64_t	len,
		rl_type_t	type
	)

Lock an object range.

Parameters:

off	Offset into the file that begins the range
len	Length of the range to lock
type	Either shared (RL_READER) or exclusive (RL_WRITER or RL_APPEND). APPEND is a special type that is converted to WRITER that specified to lock from the start of the end of file.

Returns:

The range lock structure for later unlocking or reduce range (if entire file previously locked as RL_WRITER).

Definition at line 423 of file zfs_rlock.c.

void zfs_range_reduce	(	rl_t *	rl,
		uint64_t	off,
		uint64_t	len
	)

Unlock range and destroy range lock structure.

Unlock range and destroy range lock structure.

Asserts the whole file is exclusivly locked and so there's only one entry in the tree.

Definition at line 562 of file zfs_rlock.c.

void zfs_range_unlock

(

rl_t *

rl

)

Definition at line 524 of file zfs_rlock.c.