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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (C) 2011 Lawrence Livermore National Security, LLC.
* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
* LLNL-CODE-403049.
* Rewritten for Linux by:
* Rohan Puri <rohan.puri15@gmail.com>
* Brian Behlendorf <behlendorf1@llnl.gov>
*/
#ifndef _ZFS_CTLDIR_H
#define _ZFS_CTLDIR_H
#include <sys/vnode.h>
#include <sys/zfs_vfsops.h>
#include <sys/zfs_znode.h>
#define ZFS_CTLDIR_NAME ".zfs"
#define ZFS_SNAPDIR_NAME "snapshot"
#define ZFS_SHAREDIR_NAME "shares"
#define zfs_has_ctldir(zdp) \
((zdp)->z_id == ZTOZSB(zdp)->z_root && \
(ZTOZSB(zdp)->z_ctldir != NULL))
#define zfs_show_ctldir(zdp) \
(zfs_has_ctldir(zdp) && \
(ZTOZSB(zdp)->z_show_ctldir))
typedef struct {
char *se_name;
char *se_path;
struct inode *se_inode;
struct delayed_work se_work;
avl_node_t se_node;
} zfs_snapentry_t;
/* zfsctl generic functions */
extern int snapentry_compare(const void *a, const void *b);
extern boolean_t zfsctl_is_node(struct inode *ip);
extern boolean_t zfsctl_is_snapdir(struct inode *ip);
extern void zfsctl_inode_inactive(struct inode *ip);
extern void zfsctl_inode_destroy(struct inode *ip);
extern int zfsctl_create(zfs_sb_t *zsb);
extern void zfsctl_destroy(zfs_sb_t *zsb);
extern struct inode *zfsctl_root(znode_t *zp);
extern int zfsctl_fid(struct inode *ip, fid_t *fidp);
/* zfsctl '.zfs' functions */
extern int zfsctl_root_lookup(struct inode *dip, char *name,
struct inode **ipp, int flags, cred_t *cr, int *direntflags,
pathname_t *realpnp);
/* zfsctl '.zfs/snapshot' functions */
extern int zfsctl_snapdir_lookup(struct inode *dip, char *name,
struct inode **ipp, int flags, cred_t *cr, int *direntflags,
pathname_t *realpnp);
extern int zfsctl_snapdir_rename(struct inode *sdip, char *sname,
struct inode *tdip, char *tname, cred_t *cr, int flags);
extern int zfsctl_snapdir_remove(struct inode *dip, char *name, cred_t *cr,
int flags);
extern int zfsctl_snapdir_mkdir(struct inode *dip, char *dirname, vattr_t *vap,
struct inode **ipp, cred_t *cr, int flags);
extern void zfsctl_snapdir_inactive(struct inode *ip);
extern int zfsctl_unmount_snapshot(zfs_sb_t *zsb, char *name, int flags);
extern int zfsctl_unmount_snapshots(zfs_sb_t *zsb, int flags, int *count);
extern int zfsctl_mount_snapshot(struct path *path, int flags);
extern int zfsctl_lookup_objset(struct super_block *sb, uint64_t objsetid,
zfs_sb_t **zsb);
/* zfsctl '.zfs/shares' functions */
extern int zfsctl_shares_lookup(struct inode *dip, char *name,
struct inode **ipp, int flags, cred_t *cr, int *direntflags,
pathname_t *realpnp);
/* zfsctl_init/fini functions */
extern void zfsctl_init(void);
extern void zfsctl_fini(void);
/*
* These inodes numbers are reserved for the .zfs control directory.
* It is important that they be no larger that 48-bits because only
* 6 bytes are reserved in the NFS file handle for the object number.
* However, they should be as large as possible to avoid conflicts
* with the objects which are assigned monotonically by the dmu.
*/
#define ZFSCTL_INO_ROOT 0x0000FFFFFFFFFFFF
#define ZFSCTL_INO_SHARES 0x0000FFFFFFFFFFFE
#define ZFSCTL_INO_SNAPDIR 0x0000FFFFFFFFFFFD
#define ZFSCTL_INO_SNAPDIRS 0x0000FFFFFFFFFFFC
#define ZFSCTL_EXPIRE_SNAPSHOT 300
#endif /* _ZFS_CTLDIR_H */
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