sys/zfs_vfsops.h File Reference

#include <sys/list.h>
#include <sys/vfs.h>
#include <sys/zil.h>
#include <sys/sa.h>
#include <sys/rrwlock.h>
#include <sys/zfs_ioctl.h>
#include <sys/rrwlock.h>

Include dependency graph for zfs_vfsops.h:

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Data Structures
struct	zfsvfs
struct	zfid_short
	File IDs for normal filesystems. More...
struct	zfid_long
	File IDs for snapshot filesystems. More...
Defines
#define	ZFS_OBJ_MTX_SZ   64
#define	SHORT_FID_LEN   (sizeof (zfid_short_t) - sizeof (uint16_t))
#define	LONG_FID_LEN   (sizeof (zfid_long_t) - sizeof (uint16_t))
Typedefs
typedef struct zfsvfs	zfsvfs_t
typedef struct zfid_short	zfid_short_t
	File IDs for normal filesystems.
typedef struct zfid_long	zfid_long_t
	File IDs for snapshot filesystems.
Functions
int	zfs_suspend_fs (zfsvfs_t *zfsvfs)
	Block out VOPs and close zfsvfs_t::z_os.
int	zfs_resume_fs (zfsvfs_t *zfsvfs, const char *osname)
	Reopen zfsvfs_t::z_os and release VOPs.
int	zfs_userspace_one (zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, const char *domain, uint64_t rid, uint64_t *valuep)
int	zfs_userspace_many (zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, uint64_t *cookiep, void *vbuf, uint64_t *bufsizep)
int	zfs_set_userquota (zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, const char *domain, uint64_t rid, uint64_t quota)
boolean_t	zfs_owner_overquota (zfsvfs_t *zfsvfs, struct znode *, boolean_t isgroup)
boolean_t	zfs_fuid_overquota (zfsvfs_t *zfsvfs, boolean_t isgroup, uint64_t fuid)
int	zfs_set_version (zfsvfs_t *zfsvfs, uint64_t newvers)
int	zfsvfs_create (const char *name, zfsvfs_t **zfvp)
void	zfsvfs_free (zfsvfs_t *zfsvfs)
int	zfs_check_global_label (const char *dsname, const char *hexsl)
int	zfs_vnode_lock (vnode_t *vp, int flags)
void	zfsvfs_update_fromname (const char *oldname, const char *newname)
Variables
uint_t	zfs_fsyncer_key
int	zfs_super_owner

---

Define Documentation

#define LONG_FID_LEN   (sizeof (zfid_long_t) - sizeof (uint16_t))

Definition at line 139 of file zfs_vfsops.h.

#define SHORT_FID_LEN   (sizeof (zfid_short_t) - sizeof (uint16_t))

Definition at line 138 of file zfs_vfsops.h.

#define ZFS_OBJ_MTX_SZ   64

Definition at line 85 of file zfs_vfsops.h.

---

Typedef Documentation

typedef struct zfid_long zfid_long_t

File IDs for snapshot filesystems.

Filesystems under .zfs/snapshot have a total file ID size of 22 bytes (including the length field). This makes files under .zfs/snapshot accessible by NFSv3 and NFSv4, but not NFSv2.

For files under .zfs/snapshot, we partition up the available space as follows: 2 bytes fid length (required) 6 bytes object number (48 bits) 4 bytes generation number (32 bits) 6 bytes objset id (48 bits) 4 bytes currently just zero (32 bits)

We reserve only 48 bits for the object number and objset id, as these are the limits currently defined and imposed by the DMU.

typedef struct zfid_short zfid_short_t

File IDs for normal filesystems.

Normal filesystems (those not under .zfs/snapshot) have a total file ID size limited to 12 bytes (including the length field) due to NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical reasons, this same limit is being imposed by the Solaris NFSv3 implementation (although the NFSv3 protocol actually permits a maximum of 64 bytes). It is not possible to expand beyond 12 bytes without abandoning support of NFSv2.

For normal filesystems, we partition up the available space as follows: 2 bytes fid length (required) 6 bytes object number (48 bits) 4 bytes generation number (32 bits)

We reserve only 48 bits for the object number, as this is the limit currently defined and imposed by the DMU.

typedef struct zfsvfs zfsvfs_t

Definition at line 41 of file zfs_vfsops.h.

---

Function Documentation

int zfs_check_global_label	(	const char *	dsname,
		const char *	hexsl
	)

boolean_t zfs_fuid_overquota	(	zfsvfs_t *	zfsvfs,
		boolean_t	isgroup,
		uint64_t	fuid
	)

Definition at line 801 of file zfs_vfsops.c.

boolean_t zfs_owner_overquota	(	zfsvfs_t *	zfsvfs,
		struct znode *	,
		boolean_t	isgroup
	)

Definition at line 825 of file zfs_vfsops.c.

int zfs_resume_fs	(	zfsvfs_t *	zfsvfs,
		const char *	osname
	)

Reopen zfsvfs_t::z_os and release VOPs.

Definition at line 2182 of file zfs_vfsops.c.

int zfs_set_userquota	(	zfsvfs_t *	zfsvfs,
		zfs_userquota_prop_t	type,
		const char *	domain,
		uint64_t	rid,
		uint64_t	quota
	)

Definition at line 740 of file zfs_vfsops.c.

int zfs_set_version	(	zfsvfs_t *	zfsvfs,
		uint64_t	newvers
	)

Definition at line 2351 of file zfs_vfsops.c.

int zfs_suspend_fs

(

zfsvfs_t *

zfsvfs

)

Block out VOPs and close zfsvfs_t::z_os.

Note:

If successful, then we return with the 'z_teardown_lock' and 'z_teardown_inactive_lock' write held.

Definition at line 2167 of file zfs_vfsops.c.

int zfs_userspace_many	(	zfsvfs_t *	zfsvfs,
		zfs_userquota_prop_t	type,
		uint64_t *	cookiep,
		void *	vbuf,
		uint64_t *	bufsizep
	)

Definition at line 651 of file zfs_vfsops.c.

int zfs_userspace_one	(	zfsvfs_t *	zfsvfs,
		zfs_userquota_prop_t	type,
		const char *	domain,
		uint64_t	rid,
		uint64_t *	valuep
	)

Definition at line 713 of file zfs_vfsops.c.

int zfs_vnode_lock	(	vnode_t *	vp,
		int	flags
	)

Definition at line 1740 of file zfs_vfsops.c.

int zfsvfs_create	(	const char *	name,
		zfsvfs_t **	zfvp
	)

Definition at line 841 of file zfs_vfsops.c.

void zfsvfs_free

(

zfsvfs_t *

zfsvfs

)

Definition at line 1064 of file zfs_vfsops.c.

void zfsvfs_update_fromname	(	const char *	oldname,
		const char *	newname
	)

Definition at line 2461 of file zfs_vfsops.c.

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Variable Documentation

uint_t zfs_fsyncer_key

Definition at line 5408 of file zfs_ioctl.c.

int zfs_super_owner

Definition at line 71 of file zfs_vfsops.c.