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 https://opensource.org/licenses/CDDL-1.0.
  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_minor(const char *);
  39 extern void zvol_create_minors_recursive(const char *);
  40 extern void zvol_remove_minors(spa_t *, const char *, boolean_t);
  41 extern void zvol_rename_minors(spa_t *, const char *, const char *, boolean_t);
  42
  43 #ifdef _KERNEL
  44 struct zvol_state;
  45 typedef struct zvol_state zvol_state_handle_t;
  46
  47 extern int zvol_check_volsize(uint64_t, uint64_t);
  48 extern int zvol_check_volblocksize(const char *, uint64_t);
  49 extern int zvol_get_stats(objset_t *, nvlist_t *);
  50 extern boolean_t zvol_is_zvol(const char *);
  51 extern void zvol_create_cb(objset_t *, void *, cred_t *, dmu_tx_t *);
  52 extern int zvol_set_volsize(const char *, uint64_t);
  53 extern int zvol_set_volthreading(const char *, boolean_t);
  54 extern int zvol_set_common(const char *, zfs_prop_t, zprop_source_t, uint64_t);
  55 extern int zvol_set_ro(const char *, boolean_t);
  56 extern zvol_state_handle_t *zvol_suspend(const char *);
  57 extern int zvol_resume(zvol_state_handle_t *);
  58 extern void *zvol_tag(zvol_state_handle_t *);
  59
  60 extern int zvol_init(void);
  61 extern void zvol_fini(void);
  62 extern int zvol_busy(void);
  63
  64 #endif /* _KERNEL */
  65 #endif /* _SYS_ZVOL_H */