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      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
     32 extern "C" {
     33 #endif
     34 
     35 #define	ZVOL_OBJ		1ULL
     36 #define	ZVOL_ZAP_OBJ		2ULL
     37 
     38 #ifdef _KERNEL
     39 extern int zvol_check_volsize(uint64_t volsize, uint64_t blocksize);
     40 extern int zvol_check_volblocksize(uint64_t volblocksize);
     41 extern int zvol_get_stats(objset_t *os, nvlist_t *nv);
     42 extern void zvol_create_cb(objset_t *os, void *arg, cred_t *cr, dmu_tx_t *tx);
     43 extern int zvol_create_minor(const char *);
     44 extern int zvol_remove_minor(const char *);
     45 extern void zvol_remove_minors(const char *);
     46 extern int zvol_set_volsize(const char *, uint64_t);
     47 
     48 #ifndef __FreeBSD__
     49 extern int zvol_open(dev_t *devp, int flag, int otyp, cred_t *cr);
     50 extern int zvol_dump(dev_t dev, caddr_t addr, daddr_t offset, int nblocks);
     51 extern int zvol_close(dev_t dev, int flag, int otyp, cred_t *cr);
     52 #ifdef __NetBSD__
     53 extern void zvol_strategy(buf_t *bp);
     54 #else
     55 extern int zvol_strategy(buf_t *bp);
     56 #endif
     57 extern int zvol_read(dev_t dev, uio_t *uiop, cred_t *cr);
     58 extern int zvol_write(dev_t dev, uio_t *uiop, cred_t *cr);
     59 extern int zvol_aread(dev_t dev, struct aio_req *aio, cred_t *cr);
     60 extern int zvol_awrite(dev_t dev, struct aio_req *aio, cred_t *cr);
     61 #endif	/* !__FreeBSD__ */
     62 extern int zvol_ioctl(dev_t dev, int cmd, intptr_t arg, int flag, cred_t *cr,
     63     int *rvalp);
     64 extern int zvol_busy(void);
     65 extern void zvol_init(void);
     66 extern void zvol_fini(void);
     67 
     68 #ifdef illumos
     69 extern int zvol_get_volume_params(minor_t minor, uint64_t *blksize,
     70     uint64_t *max_xfer_len, void **minor_hdl, void **objset_hdl, void **zil_hdl,
     71     void **rl_hdl, void **bonus_hdl);
     72 extern uint64_t zvol_get_volume_size(void *minor_hdl);
     73 extern int zvol_get_volume_wce(void *minor_hdl);
     74 extern void zvol_log_write_minor(void *minor_hdl, dmu_tx_t *tx, offset_t off,
     75     ssize_t resid, boolean_t sync);
     76 #endif	/* illumos */
     77 
     78 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__NetBSD__)
     79 extern int zvol_create_minors(const char *name);
     80 extern void zvol_rename_minors(const char *oldname, const char *newname);
     81 #endif
     82 
     83 #endif	/* _KERNEL */
     84 
     85 #ifdef	__cplusplus
     86 }
     87 #endif
     88 
     89 #endif	/* _SYS_ZVOL_H */
     90