zfs/lib/libzcommon/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 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_ZVOL_H
  28 #define _SYS_ZVOL_H
  29
  30 #pragma ident   "@(#)zvol.h     1.5     08/04/01 SMI"
  31
  32 #include <sys/zfs_context.h>
  33
  34 #ifdef  __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 #define ZVOL_OBJ                1ULL
  39 #define ZVOL_ZAP_OBJ            2ULL
  40
  41 #ifdef _KERNEL
  42 extern int zvol_check_volsize(uint64_t volsize, uint64_t blocksize);
  43 extern int zvol_check_volblocksize(uint64_t volblocksize);
  44 extern int zvol_get_stats(objset_t *os, nvlist_t *nv);
  45 extern void zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
  46 extern int zvol_create_minor(const char *, major_t);
  47 extern int zvol_remove_minor(const char *);
  48 extern int zvol_set_volsize(const char *, major_t, uint64_t);
  49 extern int zvol_set_volblocksize(const char *, uint64_t);
  50
  51 extern int zvol_open(dev_t *devp, int flag, int otyp, cred_t *cr);
  52 extern int zvol_dump(dev_t dev, caddr_t addr, daddr_t offset, int nblocks);
  53 extern int zvol_close(dev_t dev, int flag, int otyp, cred_t *cr);
  54 extern int zvol_strategy(buf_t *bp);
  55 extern int zvol_read(dev_t dev, uio_t *uiop, cred_t *cr);
  56 extern int zvol_write(dev_t dev, uio_t *uiop, cred_t *cr);
  57 extern int zvol_aread(dev_t dev, struct aio_req *aio, cred_t *cr);
  58 extern int zvol_awrite(dev_t dev, struct aio_req *aio, cred_t *cr);
  59 extern int zvol_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr,
  60     int *rvalp);
  61 extern int zvol_busy(void);
  62 extern void zvol_init(void);
  63 extern void zvol_fini(void);
  64 #endif
  65
  66 #ifdef  __cplusplus
  67 }
  68 #endif
  69
  70 #endif  /* _SYS_ZVOL_H */