zvol.h revision 297077 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
24 */
25
26#ifndef	_SYS_ZVOL_H
27#define	_SYS_ZVOL_H
28
29#include <sys/zfs_context.h>
30
31#ifdef	__cplusplus
32extern "C" {
33#endif
34
35#define	ZVOL_OBJ		1ULL
36#define	ZVOL_ZAP_OBJ		2ULL
37
38#ifdef _KERNEL
39extern int zvol_check_volsize(uint64_t volsize, uint64_t blocksize);
40extern int zvol_check_volblocksize(uint64_t volblocksize);
41extern int zvol_get_stats(objset_t *os, nvlist_t *nv);
42extern void zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
43extern int zvol_create_minor(const char *);
44extern int zvol_remove_minor(const char *);
45extern void zvol_remove_minors(const char *);
46extern int zvol_set_volsize(const char *, uint64_t);
47
48#ifdef illumos
49extern int zvol_open(dev_t *devp, int flag, int otyp, cred_t *cr);
50extern int zvol_dump(dev_t dev, caddr_t addr, daddr_t offset, int nblocks);
51extern int zvol_close(dev_t dev, int flag, int otyp, cred_t *cr);
52extern int zvol_strategy(buf_t *bp);
53extern int zvol_read(dev_t dev, uio_t *uiop, cred_t *cr);
54extern int zvol_write(dev_t dev, uio_t *uiop, cred_t *cr);
55extern int zvol_aread(dev_t dev, struct aio_req *aio, cred_t *cr);
56extern int zvol_awrite(dev_t dev, struct aio_req *aio, cred_t *cr);
57#endif	/* illumos */
58extern int zvol_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr,
59    int *rvalp);
60extern int zvol_busy(void);
61extern void zvol_init(void);
62extern void zvol_fini(void);
63
64#ifdef illumos
65extern int zvol_get_volume_params(minor_t minor, uint64_t *blksize,
66    uint64_t *max_xfer_len, void **minor_hdl, void **objset_hdl, void **zil_hdl,
67    void **rl_hdl, void **bonus_hdl);
68extern uint64_t zvol_get_volume_size(void *minor_hdl);
69extern int zvol_get_volume_wce(void *minor_hdl);
70extern void zvol_log_write_minor(void *minor_hdl, dmu_tx_t *tx, offset_t off,
71    ssize_t resid, boolean_t sync);
72#endif	/* illumos */
73
74#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
75extern int zvol_create_minors(const char *name);
76extern void zvol_rename_minors(const char *oldname, const char *newname);
77#endif
78
79#endif	/* _KERNEL */
80
81#ifdef	__cplusplus
82}
83#endif
84
85#endif	/* _SYS_ZVOL_H */
86