zfs/include/sys/zvol.h

   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  * Copyright (c) 2016 Actifio, Inc. All rights reserved.
  25  */
  26
  27 #ifndef _SYS_ZVOL_H
  28 #define _SYS_ZVOL_H
  29
  30 #include <sys/zfs_context.h>
  31
  32 #define ZVOL_OBJ                1ULL
  33 #define ZVOL_ZAP_OBJ            2ULL
  34
  35 #define SPEC_MAXOFFSET_T        ((1LL << ((NBBY * sizeof (daddr32_t)) + \
  36                                 DEV_BSHIFT - 1)) - 1)
  37
  38 extern void zvol_create_minors(spa_t *spa, const char *name, boolean_t async);
  39 extern void zvol_remove_minors(spa_t *spa, const char *name, boolean_t async);
  40 extern void zvol_rename_minors(spa_t *spa, const char *oldname,
  41     const char *newname, boolean_t async);
  42
  43 #ifdef _KERNEL
  44 typedef struct zvol_state zvol_state_t;
  45
  46 extern int zvol_check_volsize(uint64_t volsize, uint64_t blocksize);
  47 extern int zvol_check_volblocksize(const char *name, uint64_t volblocksize);
  48 extern int zvol_get_stats(objset_t *os, nvlist_t *nv);
  49 extern boolean_t zvol_is_zvol(const char *);
  50 extern void zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
  51 extern int zvol_set_volsize(const char *, uint64_t);
  52 extern int zvol_set_volblocksize(const char *, uint64_t);
  53 extern int zvol_set_snapdev(const char *, zprop_source_t, uint64_t);
  54 extern int zvol_set_volmode(const char *, zprop_source_t, uint64_t);
  55 extern zvol_state_t *zvol_suspend(const char *);
  56 extern int zvol_resume(zvol_state_t *);
  57 extern void *zvol_tag(zvol_state_t *);
  58
  59 extern int zvol_init(void);
  60 extern void zvol_fini(void);
  61 #endif /* _KERNEL */
  62 #endif /* _SYS_ZVOL_H */