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Diffstat (limited to 'include/sys/zfs_ctldir.h')
| -rw-r--r-- | include/sys/zfs_ctldir.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/include/sys/zfs_ctldir.h b/include/sys/zfs_ctldir.h new file mode 100644 index 000000000..e5985295a --- /dev/null +++ b/include/sys/zfs_ctldir.h @@ -0,0 +1,113 @@ +/* + * 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 <[email protected]> + * Brian Behlendorf <[email protected]> + */ + +#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 */ |