xref: /freebsd/sys/cam/ctl/ctl_backend_block.c (revision a15bbf15087e274d0dae23327dca41c1bf7aeaa5)
1130f4520SKenneth D. Merry /*-
2130f4520SKenneth D. Merry  * Copyright (c) 2003 Silicon Graphics International Corp.
3130f4520SKenneth D. Merry  * Copyright (c) 2009-2011 Spectra Logic Corporation
481177295SEdward Tomasz Napierala  * Copyright (c) 2012 The FreeBSD Foundation
5130f4520SKenneth D. Merry  * All rights reserved.
6130f4520SKenneth D. Merry  *
781177295SEdward Tomasz Napierala  * Portions of this software were developed by Edward Tomasz Napierala
881177295SEdward Tomasz Napierala  * under sponsorship from the FreeBSD Foundation.
981177295SEdward Tomasz Napierala  *
10130f4520SKenneth D. Merry  * Redistribution and use in source and binary forms, with or without
11130f4520SKenneth D. Merry  * modification, are permitted provided that the following conditions
12130f4520SKenneth D. Merry  * are met:
13130f4520SKenneth D. Merry  * 1. Redistributions of source code must retain the above copyright
14130f4520SKenneth D. Merry  *    notice, this list of conditions, and the following disclaimer,
15130f4520SKenneth D. Merry  *    without modification.
16130f4520SKenneth D. Merry  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
17130f4520SKenneth D. Merry  *    substantially similar to the "NO WARRANTY" disclaimer below
18130f4520SKenneth D. Merry  *    ("Disclaimer") and any redistribution must be conditioned upon
19130f4520SKenneth D. Merry  *    including a substantially similar Disclaimer requirement for further
20130f4520SKenneth D. Merry  *    binary redistribution.
21130f4520SKenneth D. Merry  *
22130f4520SKenneth D. Merry  * NO WARRANTY
23130f4520SKenneth D. Merry  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24130f4520SKenneth D. Merry  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25130f4520SKenneth D. Merry  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
26130f4520SKenneth D. Merry  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27130f4520SKenneth D. Merry  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28130f4520SKenneth D. Merry  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29130f4520SKenneth D. Merry  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30130f4520SKenneth D. Merry  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31130f4520SKenneth D. Merry  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
32130f4520SKenneth D. Merry  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33130f4520SKenneth D. Merry  * POSSIBILITY OF SUCH DAMAGES.
34130f4520SKenneth D. Merry  *
35130f4520SKenneth D. Merry  * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend_block.c#5 $
36130f4520SKenneth D. Merry  */
37130f4520SKenneth D. Merry /*
38130f4520SKenneth D. Merry  * CAM Target Layer driver backend for block devices.
39130f4520SKenneth D. Merry  *
40130f4520SKenneth D. Merry  * Author: Ken Merry <ken@FreeBSD.org>
41130f4520SKenneth D. Merry  */
42130f4520SKenneth D. Merry #include <sys/cdefs.h>
43130f4520SKenneth D. Merry __FBSDID("$FreeBSD$");
44130f4520SKenneth D. Merry 
45130f4520SKenneth D. Merry #include <sys/param.h>
46130f4520SKenneth D. Merry #include <sys/systm.h>
47130f4520SKenneth D. Merry #include <sys/kernel.h>
48130f4520SKenneth D. Merry #include <sys/types.h>
49130f4520SKenneth D. Merry #include <sys/kthread.h>
50130f4520SKenneth D. Merry #include <sys/bio.h>
51130f4520SKenneth D. Merry #include <sys/fcntl.h>
52ee7f31c0SAlexander Motin #include <sys/limits.h>
53130f4520SKenneth D. Merry #include <sys/lock.h>
54130f4520SKenneth D. Merry #include <sys/mutex.h>
55130f4520SKenneth D. Merry #include <sys/condvar.h>
56130f4520SKenneth D. Merry #include <sys/malloc.h>
57130f4520SKenneth D. Merry #include <sys/conf.h>
58130f4520SKenneth D. Merry #include <sys/ioccom.h>
59130f4520SKenneth D. Merry #include <sys/queue.h>
60130f4520SKenneth D. Merry #include <sys/sbuf.h>
61130f4520SKenneth D. Merry #include <sys/endian.h>
62130f4520SKenneth D. Merry #include <sys/uio.h>
63130f4520SKenneth D. Merry #include <sys/buf.h>
64130f4520SKenneth D. Merry #include <sys/taskqueue.h>
65130f4520SKenneth D. Merry #include <sys/vnode.h>
66130f4520SKenneth D. Merry #include <sys/namei.h>
67130f4520SKenneth D. Merry #include <sys/mount.h>
68130f4520SKenneth D. Merry #include <sys/disk.h>
69130f4520SKenneth D. Merry #include <sys/fcntl.h>
70130f4520SKenneth D. Merry #include <sys/filedesc.h>
71ef8daf3fSAlexander Motin #include <sys/filio.h>
72130f4520SKenneth D. Merry #include <sys/proc.h>
73130f4520SKenneth D. Merry #include <sys/pcpu.h>
74130f4520SKenneth D. Merry #include <sys/module.h>
75130f4520SKenneth D. Merry #include <sys/sdt.h>
76130f4520SKenneth D. Merry #include <sys/devicestat.h>
77130f4520SKenneth D. Merry #include <sys/sysctl.h>
78130f4520SKenneth D. Merry 
79130f4520SKenneth D. Merry #include <geom/geom.h>
80130f4520SKenneth D. Merry 
81130f4520SKenneth D. Merry #include <cam/cam.h>
82130f4520SKenneth D. Merry #include <cam/scsi/scsi_all.h>
83130f4520SKenneth D. Merry #include <cam/scsi/scsi_da.h>
84130f4520SKenneth D. Merry #include <cam/ctl/ctl_io.h>
85130f4520SKenneth D. Merry #include <cam/ctl/ctl.h>
86130f4520SKenneth D. Merry #include <cam/ctl/ctl_backend.h>
87130f4520SKenneth D. Merry #include <cam/ctl/ctl_ioctl.h>
88130f4520SKenneth D. Merry #include <cam/ctl/ctl_scsi_all.h>
89130f4520SKenneth D. Merry #include <cam/ctl/ctl_error.h>
90130f4520SKenneth D. Merry 
91130f4520SKenneth D. Merry /*
9208a7cce5SAlexander Motin  * The idea here is that we'll allocate enough S/G space to hold a 1MB
9308a7cce5SAlexander Motin  * I/O.  If we get an I/O larger than that, we'll split it.
94130f4520SKenneth D. Merry  */
9511b569f7SAlexander Motin #define	CTLBLK_HALF_IO_SIZE	(512 * 1024)
9611b569f7SAlexander Motin #define	CTLBLK_MAX_IO_SIZE	(CTLBLK_HALF_IO_SIZE * 2)
9708a7cce5SAlexander Motin #define	CTLBLK_MAX_SEG		MAXPHYS
9811b569f7SAlexander Motin #define	CTLBLK_HALF_SEGS	MAX(CTLBLK_HALF_IO_SIZE / CTLBLK_MAX_SEG, 1)
9911b569f7SAlexander Motin #define	CTLBLK_MAX_SEGS		(CTLBLK_HALF_SEGS * 2)
100130f4520SKenneth D. Merry 
101130f4520SKenneth D. Merry #ifdef CTLBLK_DEBUG
102130f4520SKenneth D. Merry #define DPRINTF(fmt, args...) \
103130f4520SKenneth D. Merry     printf("cbb(%s:%d): " fmt, __FUNCTION__, __LINE__, ##args)
104130f4520SKenneth D. Merry #else
105130f4520SKenneth D. Merry #define DPRINTF(fmt, args...) do {} while(0)
106130f4520SKenneth D. Merry #endif
107130f4520SKenneth D. Merry 
108e86a4142SAlexander Motin #define PRIV(io)	\
109e86a4142SAlexander Motin     ((struct ctl_ptr_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_BACKEND])
11011b569f7SAlexander Motin #define ARGS(io)	\
11111b569f7SAlexander Motin     ((struct ctl_lba_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN])
112e86a4142SAlexander Motin 
113130f4520SKenneth D. Merry SDT_PROVIDER_DEFINE(cbb);
114130f4520SKenneth D. Merry 
115130f4520SKenneth D. Merry typedef enum {
116130f4520SKenneth D. Merry 	CTL_BE_BLOCK_LUN_UNCONFIGURED	= 0x01,
117130f4520SKenneth D. Merry 	CTL_BE_BLOCK_LUN_CONFIG_ERR	= 0x02,
118130f4520SKenneth D. Merry 	CTL_BE_BLOCK_LUN_WAITING	= 0x04,
119130f4520SKenneth D. Merry 	CTL_BE_BLOCK_LUN_MULTI_THREAD	= 0x08
120130f4520SKenneth D. Merry } ctl_be_block_lun_flags;
121130f4520SKenneth D. Merry 
122130f4520SKenneth D. Merry typedef enum {
123130f4520SKenneth D. Merry 	CTL_BE_BLOCK_NONE,
124130f4520SKenneth D. Merry 	CTL_BE_BLOCK_DEV,
125130f4520SKenneth D. Merry 	CTL_BE_BLOCK_FILE
126130f4520SKenneth D. Merry } ctl_be_block_type;
127130f4520SKenneth D. Merry 
128130f4520SKenneth D. Merry struct ctl_be_block_devdata {
129130f4520SKenneth D. Merry 	struct cdev *cdev;
130130f4520SKenneth D. Merry 	struct cdevsw *csw;
131130f4520SKenneth D. Merry 	int dev_ref;
132130f4520SKenneth D. Merry };
133130f4520SKenneth D. Merry 
134130f4520SKenneth D. Merry struct ctl_be_block_filedata {
135130f4520SKenneth D. Merry 	struct ucred *cred;
136130f4520SKenneth D. Merry };
137130f4520SKenneth D. Merry 
138130f4520SKenneth D. Merry union ctl_be_block_bedata {
139130f4520SKenneth D. Merry 	struct ctl_be_block_devdata dev;
140130f4520SKenneth D. Merry 	struct ctl_be_block_filedata file;
141130f4520SKenneth D. Merry };
142130f4520SKenneth D. Merry 
143130f4520SKenneth D. Merry struct ctl_be_block_io;
144130f4520SKenneth D. Merry struct ctl_be_block_lun;
145130f4520SKenneth D. Merry 
146130f4520SKenneth D. Merry typedef void (*cbb_dispatch_t)(struct ctl_be_block_lun *be_lun,
147130f4520SKenneth D. Merry 			       struct ctl_be_block_io *beio);
148c3e7ba3eSAlexander Motin typedef uint64_t (*cbb_getattr_t)(struct ctl_be_block_lun *be_lun,
149c3e7ba3eSAlexander Motin 				  const char *attrname);
150130f4520SKenneth D. Merry 
151130f4520SKenneth D. Merry /*
152130f4520SKenneth D. Merry  * Backend LUN structure.  There is a 1:1 mapping between a block device
153130f4520SKenneth D. Merry  * and a backend block LUN, and between a backend block LUN and a CTL LUN.
154130f4520SKenneth D. Merry  */
155130f4520SKenneth D. Merry struct ctl_be_block_lun {
15619720f41SAlexander Motin 	struct ctl_lun_create_params params;
157130f4520SKenneth D. Merry 	struct ctl_block_disk *disk;
158130f4520SKenneth D. Merry 	char lunname[32];
159130f4520SKenneth D. Merry 	char *dev_path;
160130f4520SKenneth D. Merry 	ctl_be_block_type dev_type;
161130f4520SKenneth D. Merry 	struct vnode *vn;
162130f4520SKenneth D. Merry 	union ctl_be_block_bedata backend;
163130f4520SKenneth D. Merry 	cbb_dispatch_t dispatch;
164130f4520SKenneth D. Merry 	cbb_dispatch_t lun_flush;
165ee7f31c0SAlexander Motin 	cbb_dispatch_t unmap;
166ef8daf3fSAlexander Motin 	cbb_dispatch_t get_lba_status;
167c3e7ba3eSAlexander Motin 	cbb_getattr_t getattr;
168130f4520SKenneth D. Merry 	uma_zone_t lun_zone;
169130f4520SKenneth D. Merry 	uint64_t size_blocks;
170130f4520SKenneth D. Merry 	uint64_t size_bytes;
171130f4520SKenneth D. Merry 	uint32_t blocksize;
172f6012722SAlexander Motin 	uint16_t pblockexp;
173f6012722SAlexander Motin 	uint16_t pblockoff;
17434961f40SAlexander Motin 	uint16_t ublockexp;
17534961f40SAlexander Motin 	uint16_t ublockoff;
176cb8727e2SAlexander Motin 	uint32_t atomicblock;
177cb8727e2SAlexander Motin 	uint32_t opttxferlen;
178130f4520SKenneth D. Merry 	struct ctl_be_block_softc *softc;
179130f4520SKenneth D. Merry 	struct devstat *disk_stats;
180130f4520SKenneth D. Merry 	ctl_be_block_lun_flags flags;
181130f4520SKenneth D. Merry 	STAILQ_ENTRY(ctl_be_block_lun) links;
182130f4520SKenneth D. Merry 	struct ctl_be_lun ctl_be_lun;
183130f4520SKenneth D. Merry 	struct taskqueue *io_taskqueue;
184130f4520SKenneth D. Merry 	struct task io_task;
185130f4520SKenneth D. Merry 	int num_threads;
186130f4520SKenneth D. Merry 	STAILQ_HEAD(, ctl_io_hdr) input_queue;
187ef8daf3fSAlexander Motin 	STAILQ_HEAD(, ctl_io_hdr) config_read_queue;
188130f4520SKenneth D. Merry 	STAILQ_HEAD(, ctl_io_hdr) config_write_queue;
189130f4520SKenneth D. Merry 	STAILQ_HEAD(, ctl_io_hdr) datamove_queue;
19075c7a1d3SAlexander Motin 	struct mtx_padalign io_lock;
19175c7a1d3SAlexander Motin 	struct mtx_padalign queue_lock;
192130f4520SKenneth D. Merry };
193130f4520SKenneth D. Merry 
194130f4520SKenneth D. Merry /*
195130f4520SKenneth D. Merry  * Overall softc structure for the block backend module.
196130f4520SKenneth D. Merry  */
197130f4520SKenneth D. Merry struct ctl_be_block_softc {
198130f4520SKenneth D. Merry 	struct mtx			 lock;
199130f4520SKenneth D. Merry 	int				 num_disks;
200130f4520SKenneth D. Merry 	STAILQ_HEAD(, ctl_block_disk)	 disk_list;
201130f4520SKenneth D. Merry 	int				 num_luns;
202130f4520SKenneth D. Merry 	STAILQ_HEAD(, ctl_be_block_lun)	 lun_list;
203130f4520SKenneth D. Merry };
204130f4520SKenneth D. Merry 
205130f4520SKenneth D. Merry static struct ctl_be_block_softc backend_block_softc;
206130f4520SKenneth D. Merry 
207130f4520SKenneth D. Merry /*
208130f4520SKenneth D. Merry  * Per-I/O information.
209130f4520SKenneth D. Merry  */
210130f4520SKenneth D. Merry struct ctl_be_block_io {
211130f4520SKenneth D. Merry 	union ctl_io			*io;
212130f4520SKenneth D. Merry 	struct ctl_sg_entry		sg_segs[CTLBLK_MAX_SEGS];
213130f4520SKenneth D. Merry 	struct iovec			xiovecs[CTLBLK_MAX_SEGS];
214130f4520SKenneth D. Merry 	int				bio_cmd;
215130f4520SKenneth D. Merry 	int				num_segs;
216130f4520SKenneth D. Merry 	int				num_bios_sent;
217130f4520SKenneth D. Merry 	int				num_bios_done;
218130f4520SKenneth D. Merry 	int				send_complete;
219130f4520SKenneth D. Merry 	int				num_errors;
220130f4520SKenneth D. Merry 	struct bintime			ds_t0;
221130f4520SKenneth D. Merry 	devstat_tag_type		ds_tag_type;
222130f4520SKenneth D. Merry 	devstat_trans_flags		ds_trans_type;
223130f4520SKenneth D. Merry 	uint64_t			io_len;
224130f4520SKenneth D. Merry 	uint64_t			io_offset;
2257d0d4342SAlexander Motin 	int				io_arg;
226130f4520SKenneth D. Merry 	struct ctl_be_block_softc	*softc;
227130f4520SKenneth D. Merry 	struct ctl_be_block_lun		*lun;
228ee7f31c0SAlexander Motin 	void (*beio_cont)(struct ctl_be_block_io *beio); /* to continue processing */
229130f4520SKenneth D. Merry };
230130f4520SKenneth D. Merry 
231130f4520SKenneth D. Merry static int cbb_num_threads = 14;
232130f4520SKenneth D. Merry SYSCTL_NODE(_kern_cam_ctl, OID_AUTO, block, CTLFLAG_RD, 0,
233130f4520SKenneth D. Merry 	    "CAM Target Layer Block Backend");
234af3b2549SHans Petter Selasky SYSCTL_INT(_kern_cam_ctl_block, OID_AUTO, num_threads, CTLFLAG_RWTUN,
235130f4520SKenneth D. Merry            &cbb_num_threads, 0, "Number of threads per backing file");
236130f4520SKenneth D. Merry 
237130f4520SKenneth D. Merry static struct ctl_be_block_io *ctl_alloc_beio(struct ctl_be_block_softc *softc);
238130f4520SKenneth D. Merry static void ctl_free_beio(struct ctl_be_block_io *beio);
239130f4520SKenneth D. Merry static void ctl_complete_beio(struct ctl_be_block_io *beio);
240130f4520SKenneth D. Merry static int ctl_be_block_move_done(union ctl_io *io);
241130f4520SKenneth D. Merry static void ctl_be_block_biodone(struct bio *bio);
242130f4520SKenneth D. Merry static void ctl_be_block_flush_file(struct ctl_be_block_lun *be_lun,
243130f4520SKenneth D. Merry 				    struct ctl_be_block_io *beio);
244130f4520SKenneth D. Merry static void ctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun,
245130f4520SKenneth D. Merry 				       struct ctl_be_block_io *beio);
246ef8daf3fSAlexander Motin static void ctl_be_block_gls_file(struct ctl_be_block_lun *be_lun,
247ef8daf3fSAlexander Motin 				  struct ctl_be_block_io *beio);
24853c146deSAlexander Motin static uint64_t ctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun,
24953c146deSAlexander Motin 					 const char *attrname);
250130f4520SKenneth D. Merry static void ctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun,
251130f4520SKenneth D. Merry 				   struct ctl_be_block_io *beio);
252ee7f31c0SAlexander Motin static void ctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun,
253ee7f31c0SAlexander Motin 				   struct ctl_be_block_io *beio);
254130f4520SKenneth D. Merry static void ctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun,
255130f4520SKenneth D. Merry 				      struct ctl_be_block_io *beio);
256c3e7ba3eSAlexander Motin static uint64_t ctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun,
257c3e7ba3eSAlexander Motin 					 const char *attrname);
258ef8daf3fSAlexander Motin static void ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun,
259ef8daf3fSAlexander Motin 				    union ctl_io *io);
260130f4520SKenneth D. Merry static void ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun,
261130f4520SKenneth D. Merry 				    union ctl_io *io);
262130f4520SKenneth D. Merry static void ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun,
263130f4520SKenneth D. Merry 				  union ctl_io *io);
264130f4520SKenneth D. Merry static void ctl_be_block_worker(void *context, int pending);
265130f4520SKenneth D. Merry static int ctl_be_block_submit(union ctl_io *io);
266130f4520SKenneth D. Merry static int ctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
267130f4520SKenneth D. Merry 				   int flag, struct thread *td);
268130f4520SKenneth D. Merry static int ctl_be_block_open_file(struct ctl_be_block_lun *be_lun,
269130f4520SKenneth D. Merry 				  struct ctl_lun_req *req);
270130f4520SKenneth D. Merry static int ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun,
271130f4520SKenneth D. Merry 				 struct ctl_lun_req *req);
272130f4520SKenneth D. Merry static int ctl_be_block_close(struct ctl_be_block_lun *be_lun);
273130f4520SKenneth D. Merry static int ctl_be_block_open(struct ctl_be_block_softc *softc,
274130f4520SKenneth D. Merry 			     struct ctl_be_block_lun *be_lun,
275130f4520SKenneth D. Merry 			     struct ctl_lun_req *req);
276130f4520SKenneth D. Merry static int ctl_be_block_create(struct ctl_be_block_softc *softc,
277130f4520SKenneth D. Merry 			       struct ctl_lun_req *req);
278130f4520SKenneth D. Merry static int ctl_be_block_rm(struct ctl_be_block_softc *softc,
279130f4520SKenneth D. Merry 			   struct ctl_lun_req *req);
28081177295SEdward Tomasz Napierala static int ctl_be_block_modify_file(struct ctl_be_block_lun *be_lun,
28181177295SEdward Tomasz Napierala 				  struct ctl_lun_req *req);
28281177295SEdward Tomasz Napierala static int ctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun,
28381177295SEdward Tomasz Napierala 				 struct ctl_lun_req *req);
28481177295SEdward Tomasz Napierala static int ctl_be_block_modify(struct ctl_be_block_softc *softc,
28581177295SEdward Tomasz Napierala 			   struct ctl_lun_req *req);
286130f4520SKenneth D. Merry static void ctl_be_block_lun_shutdown(void *be_lun);
287130f4520SKenneth D. Merry static void ctl_be_block_lun_config_status(void *be_lun,
288130f4520SKenneth D. Merry 					   ctl_lun_config_status status);
289130f4520SKenneth D. Merry static int ctl_be_block_config_write(union ctl_io *io);
290130f4520SKenneth D. Merry static int ctl_be_block_config_read(union ctl_io *io);
291130f4520SKenneth D. Merry static int ctl_be_block_lun_info(void *be_lun, struct sbuf *sb);
292c3e7ba3eSAlexander Motin static uint64_t ctl_be_block_lun_attr(void *be_lun, const char *attrname);
293130f4520SKenneth D. Merry int ctl_be_block_init(void);
294130f4520SKenneth D. Merry 
295130f4520SKenneth D. Merry static struct ctl_backend_driver ctl_be_block_driver =
296130f4520SKenneth D. Merry {
2972a2443d8SKenneth D. Merry 	.name = "block",
2982a2443d8SKenneth D. Merry 	.flags = CTL_BE_FLAG_HAS_CONFIG,
2992a2443d8SKenneth D. Merry 	.init = ctl_be_block_init,
3002a2443d8SKenneth D. Merry 	.data_submit = ctl_be_block_submit,
3012a2443d8SKenneth D. Merry 	.data_move_done = ctl_be_block_move_done,
3022a2443d8SKenneth D. Merry 	.config_read = ctl_be_block_config_read,
3032a2443d8SKenneth D. Merry 	.config_write = ctl_be_block_config_write,
3042a2443d8SKenneth D. Merry 	.ioctl = ctl_be_block_ioctl,
305c3e7ba3eSAlexander Motin 	.lun_info = ctl_be_block_lun_info,
306c3e7ba3eSAlexander Motin 	.lun_attr = ctl_be_block_lun_attr
307130f4520SKenneth D. Merry };
308130f4520SKenneth D. Merry 
309130f4520SKenneth D. Merry MALLOC_DEFINE(M_CTLBLK, "ctlblk", "Memory used for CTL block backend");
310130f4520SKenneth D. Merry CTL_BACKEND_DECLARE(cbb, ctl_be_block_driver);
311130f4520SKenneth D. Merry 
312a0e36aeeSEdward Tomasz Napierala static uma_zone_t beio_zone;
313a0e36aeeSEdward Tomasz Napierala 
314130f4520SKenneth D. Merry static struct ctl_be_block_io *
315130f4520SKenneth D. Merry ctl_alloc_beio(struct ctl_be_block_softc *softc)
316130f4520SKenneth D. Merry {
317130f4520SKenneth D. Merry 	struct ctl_be_block_io *beio;
318130f4520SKenneth D. Merry 
319a0e36aeeSEdward Tomasz Napierala 	beio = uma_zalloc(beio_zone, M_WAITOK | M_ZERO);
320130f4520SKenneth D. Merry 	beio->softc = softc;
321130f4520SKenneth D. Merry 	return (beio);
322130f4520SKenneth D. Merry }
323130f4520SKenneth D. Merry 
324130f4520SKenneth D. Merry static void
325130f4520SKenneth D. Merry ctl_free_beio(struct ctl_be_block_io *beio)
326130f4520SKenneth D. Merry {
327130f4520SKenneth D. Merry 	int duplicate_free;
328130f4520SKenneth D. Merry 	int i;
329130f4520SKenneth D. Merry 
330130f4520SKenneth D. Merry 	duplicate_free = 0;
331130f4520SKenneth D. Merry 
332130f4520SKenneth D. Merry 	for (i = 0; i < beio->num_segs; i++) {
333130f4520SKenneth D. Merry 		if (beio->sg_segs[i].addr == NULL)
334130f4520SKenneth D. Merry 			duplicate_free++;
335130f4520SKenneth D. Merry 
336130f4520SKenneth D. Merry 		uma_zfree(beio->lun->lun_zone, beio->sg_segs[i].addr);
337130f4520SKenneth D. Merry 		beio->sg_segs[i].addr = NULL;
33811b569f7SAlexander Motin 
33911b569f7SAlexander Motin 		/* For compare we had two equal S/G lists. */
34011b569f7SAlexander Motin 		if (ARGS(beio->io)->flags & CTL_LLF_COMPARE) {
34111b569f7SAlexander Motin 			uma_zfree(beio->lun->lun_zone,
34211b569f7SAlexander Motin 			    beio->sg_segs[i + CTLBLK_HALF_SEGS].addr);
34311b569f7SAlexander Motin 			beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = NULL;
34411b569f7SAlexander Motin 		}
345130f4520SKenneth D. Merry 	}
346130f4520SKenneth D. Merry 
347130f4520SKenneth D. Merry 	if (duplicate_free > 0) {
348130f4520SKenneth D. Merry 		printf("%s: %d duplicate frees out of %d segments\n", __func__,
349130f4520SKenneth D. Merry 		       duplicate_free, beio->num_segs);
350130f4520SKenneth D. Merry 	}
351a0e36aeeSEdward Tomasz Napierala 
352a0e36aeeSEdward Tomasz Napierala 	uma_zfree(beio_zone, beio);
353130f4520SKenneth D. Merry }
354130f4520SKenneth D. Merry 
355130f4520SKenneth D. Merry static void
356130f4520SKenneth D. Merry ctl_complete_beio(struct ctl_be_block_io *beio)
357130f4520SKenneth D. Merry {
35875c7a1d3SAlexander Motin 	union ctl_io *io = beio->io;
359130f4520SKenneth D. Merry 
360ee7f31c0SAlexander Motin 	if (beio->beio_cont != NULL) {
361ee7f31c0SAlexander Motin 		beio->beio_cont(beio);
362ee7f31c0SAlexander Motin 	} else {
363130f4520SKenneth D. Merry 		ctl_free_beio(beio);
36411b569f7SAlexander Motin 		ctl_data_submit_done(io);
365130f4520SKenneth D. Merry 	}
366ee7f31c0SAlexander Motin }
367130f4520SKenneth D. Merry 
368130f4520SKenneth D. Merry static int
369130f4520SKenneth D. Merry ctl_be_block_move_done(union ctl_io *io)
370130f4520SKenneth D. Merry {
371130f4520SKenneth D. Merry 	struct ctl_be_block_io *beio;
372130f4520SKenneth D. Merry 	struct ctl_be_block_lun *be_lun;
37311b569f7SAlexander Motin 	struct ctl_lba_len_flags *lbalen;
374130f4520SKenneth D. Merry #ifdef CTL_TIME_IO
375130f4520SKenneth D. Merry 	struct bintime cur_bt;
376130f4520SKenneth D. Merry #endif
37711b569f7SAlexander Motin 	int i;
378130f4520SKenneth D. Merry 
379e86a4142SAlexander Motin 	beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
380130f4520SKenneth D. Merry 	be_lun = beio->lun;
381130f4520SKenneth D. Merry 
382130f4520SKenneth D. Merry 	DPRINTF("entered\n");
383130f4520SKenneth D. Merry 
384130f4520SKenneth D. Merry #ifdef CTL_TIME_IO
385130f4520SKenneth D. Merry 	getbintime(&cur_bt);
386130f4520SKenneth D. Merry 	bintime_sub(&cur_bt, &io->io_hdr.dma_start_bt);
387130f4520SKenneth D. Merry 	bintime_add(&io->io_hdr.dma_bt, &cur_bt);
388130f4520SKenneth D. Merry 	io->io_hdr.num_dmas++;
389130f4520SKenneth D. Merry #endif
39011b569f7SAlexander Motin 	io->scsiio.kern_rel_offset += io->scsiio.kern_data_len;
391130f4520SKenneth D. Merry 
392130f4520SKenneth D. Merry 	/*
393130f4520SKenneth D. Merry 	 * We set status at this point for read commands, and write
394130f4520SKenneth D. Merry 	 * commands with errors.
395130f4520SKenneth D. Merry 	 */
396f7241cceSAlexander Motin 	if (io->io_hdr.flags & CTL_FLAG_ABORT) {
397f7241cceSAlexander Motin 		;
398f7241cceSAlexander Motin 	} else if ((io->io_hdr.port_status == 0) &&
39911b569f7SAlexander Motin 	    ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) {
40011b569f7SAlexander Motin 		lbalen = ARGS(beio->io);
40111b569f7SAlexander Motin 		if (lbalen->flags & CTL_LLF_READ) {
402130f4520SKenneth D. Merry 			ctl_set_success(&io->scsiio);
40311b569f7SAlexander Motin 		} else if (lbalen->flags & CTL_LLF_COMPARE) {
40411b569f7SAlexander Motin 			/* We have two data blocks ready for comparison. */
40511b569f7SAlexander Motin 			for (i = 0; i < beio->num_segs; i++) {
40611b569f7SAlexander Motin 				if (memcmp(beio->sg_segs[i].addr,
40711b569f7SAlexander Motin 				    beio->sg_segs[i + CTLBLK_HALF_SEGS].addr,
40811b569f7SAlexander Motin 				    beio->sg_segs[i].len) != 0)
40911b569f7SAlexander Motin 					break;
41011b569f7SAlexander Motin 			}
41111b569f7SAlexander Motin 			if (i < beio->num_segs)
41211b569f7SAlexander Motin 				ctl_set_sense(&io->scsiio,
41311b569f7SAlexander Motin 				    /*current_error*/ 1,
41411b569f7SAlexander Motin 				    /*sense_key*/ SSD_KEY_MISCOMPARE,
41511b569f7SAlexander Motin 				    /*asc*/ 0x1D,
41611b569f7SAlexander Motin 				    /*ascq*/ 0x00,
41711b569f7SAlexander Motin 				    SSD_ELEM_NONE);
41811b569f7SAlexander Motin 			else
41911b569f7SAlexander Motin 				ctl_set_success(&io->scsiio);
42011b569f7SAlexander Motin 		}
421f7241cceSAlexander Motin 	} else if ((io->io_hdr.port_status != 0) &&
422f7241cceSAlexander Motin 	    ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE ||
423f7241cceSAlexander Motin 	     (io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS)) {
424130f4520SKenneth D. Merry 		/*
425130f4520SKenneth D. Merry 		 * For hardware error sense keys, the sense key
426130f4520SKenneth D. Merry 		 * specific value is defined to be a retry count,
427130f4520SKenneth D. Merry 		 * but we use it to pass back an internal FETD
428130f4520SKenneth D. Merry 		 * error code.  XXX KDM  Hopefully the FETD is only
429130f4520SKenneth D. Merry 		 * using 16 bits for an error code, since that's
430130f4520SKenneth D. Merry 		 * all the space we have in the sks field.
431130f4520SKenneth D. Merry 		 */
432130f4520SKenneth D. Merry 		ctl_set_internal_failure(&io->scsiio,
433130f4520SKenneth D. Merry 					 /*sks_valid*/ 1,
434130f4520SKenneth D. Merry 					 /*retry_count*/
435130f4520SKenneth D. Merry 					 io->io_hdr.port_status);
436130f4520SKenneth D. Merry 	}
437130f4520SKenneth D. Merry 
438130f4520SKenneth D. Merry 	/*
439130f4520SKenneth D. Merry 	 * If this is a read, or a write with errors, it is done.
440130f4520SKenneth D. Merry 	 */
441130f4520SKenneth D. Merry 	if ((beio->bio_cmd == BIO_READ)
442130f4520SKenneth D. Merry 	 || ((io->io_hdr.flags & CTL_FLAG_ABORT) != 0)
443130f4520SKenneth D. Merry 	 || ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)) {
444130f4520SKenneth D. Merry 		ctl_complete_beio(beio);
445130f4520SKenneth D. Merry 		return (0);
446130f4520SKenneth D. Merry 	}
447130f4520SKenneth D. Merry 
448130f4520SKenneth D. Merry 	/*
449130f4520SKenneth D. Merry 	 * At this point, we have a write and the DMA completed
450130f4520SKenneth D. Merry 	 * successfully.  We now have to queue it to the task queue to
451130f4520SKenneth D. Merry 	 * execute the backend I/O.  That is because we do blocking
452130f4520SKenneth D. Merry 	 * memory allocations, and in the file backing case, blocking I/O.
453130f4520SKenneth D. Merry 	 * This move done routine is generally called in the SIM's
454130f4520SKenneth D. Merry 	 * interrupt context, and therefore we cannot block.
455130f4520SKenneth D. Merry 	 */
45675c7a1d3SAlexander Motin 	mtx_lock(&be_lun->queue_lock);
457130f4520SKenneth D. Merry 	/*
458130f4520SKenneth D. Merry 	 * XXX KDM make sure that links is okay to use at this point.
459130f4520SKenneth D. Merry 	 * Otherwise, we either need to add another field to ctl_io_hdr,
460130f4520SKenneth D. Merry 	 * or deal with resource allocation here.
461130f4520SKenneth D. Merry 	 */
462130f4520SKenneth D. Merry 	STAILQ_INSERT_TAIL(&be_lun->datamove_queue, &io->io_hdr, links);
46375c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->queue_lock);
464130f4520SKenneth D. Merry 
465130f4520SKenneth D. Merry 	taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task);
466130f4520SKenneth D. Merry 
467130f4520SKenneth D. Merry 	return (0);
468130f4520SKenneth D. Merry }
469130f4520SKenneth D. Merry 
470130f4520SKenneth D. Merry static void
471130f4520SKenneth D. Merry ctl_be_block_biodone(struct bio *bio)
472130f4520SKenneth D. Merry {
473130f4520SKenneth D. Merry 	struct ctl_be_block_io *beio;
474130f4520SKenneth D. Merry 	struct ctl_be_block_lun *be_lun;
475130f4520SKenneth D. Merry 	union ctl_io *io;
476e0c2f975SAlexander Motin 	int error;
477130f4520SKenneth D. Merry 
478130f4520SKenneth D. Merry 	beio = bio->bio_caller1;
479130f4520SKenneth D. Merry 	be_lun = beio->lun;
480130f4520SKenneth D. Merry 	io = beio->io;
481130f4520SKenneth D. Merry 
482130f4520SKenneth D. Merry 	DPRINTF("entered\n");
483130f4520SKenneth D. Merry 
484e0c2f975SAlexander Motin 	error = bio->bio_error;
48575c7a1d3SAlexander Motin 	mtx_lock(&be_lun->io_lock);
486e0c2f975SAlexander Motin 	if (error != 0)
487130f4520SKenneth D. Merry 		beio->num_errors++;
488130f4520SKenneth D. Merry 
489130f4520SKenneth D. Merry 	beio->num_bios_done++;
490130f4520SKenneth D. Merry 
491130f4520SKenneth D. Merry 	/*
492130f4520SKenneth D. Merry 	 * XXX KDM will this cause WITNESS to complain?  Holding a lock
493130f4520SKenneth D. Merry 	 * during the free might cause it to complain.
494130f4520SKenneth D. Merry 	 */
495130f4520SKenneth D. Merry 	g_destroy_bio(bio);
496130f4520SKenneth D. Merry 
497130f4520SKenneth D. Merry 	/*
498130f4520SKenneth D. Merry 	 * If the send complete bit isn't set, or we aren't the last I/O to
499130f4520SKenneth D. Merry 	 * complete, then we're done.
500130f4520SKenneth D. Merry 	 */
501130f4520SKenneth D. Merry 	if ((beio->send_complete == 0)
502130f4520SKenneth D. Merry 	 || (beio->num_bios_done < beio->num_bios_sent)) {
50375c7a1d3SAlexander Motin 		mtx_unlock(&be_lun->io_lock);
504130f4520SKenneth D. Merry 		return;
505130f4520SKenneth D. Merry 	}
506130f4520SKenneth D. Merry 
507130f4520SKenneth D. Merry 	/*
508130f4520SKenneth D. Merry 	 * At this point, we've verified that we are the last I/O to
509130f4520SKenneth D. Merry 	 * complete, so it's safe to drop the lock.
510130f4520SKenneth D. Merry 	 */
51175c7a1d3SAlexander Motin 	devstat_end_transaction(beio->lun->disk_stats, beio->io_len,
51275c7a1d3SAlexander Motin 	    beio->ds_tag_type, beio->ds_trans_type,
51375c7a1d3SAlexander Motin 	    /*now*/ NULL, /*then*/&beio->ds_t0);
51475c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
515130f4520SKenneth D. Merry 
516130f4520SKenneth D. Merry 	/*
517130f4520SKenneth D. Merry 	 * If there are any errors from the backing device, we fail the
518130f4520SKenneth D. Merry 	 * entire I/O with a medium error.
519130f4520SKenneth D. Merry 	 */
520130f4520SKenneth D. Merry 	if (beio->num_errors > 0) {
521e0c2f975SAlexander Motin 		if (error == EOPNOTSUPP) {
522e0c2f975SAlexander Motin 			ctl_set_invalid_opcode(&io->scsiio);
5230631de4aSAlexander Motin 		} else if (error == ENOSPC || error == EDQUOT) {
5244fc18ff9SAlexander Motin 			ctl_set_space_alloc_fail(&io->scsiio);
525e0c2f975SAlexander Motin 		} else if (beio->bio_cmd == BIO_FLUSH) {
526130f4520SKenneth D. Merry 			/* XXX KDM is there is a better error here? */
527130f4520SKenneth D. Merry 			ctl_set_internal_failure(&io->scsiio,
528130f4520SKenneth D. Merry 						 /*sks_valid*/ 1,
529130f4520SKenneth D. Merry 						 /*retry_count*/ 0xbad2);
530130f4520SKenneth D. Merry 		} else
531130f4520SKenneth D. Merry 			ctl_set_medium_error(&io->scsiio);
532130f4520SKenneth D. Merry 		ctl_complete_beio(beio);
533130f4520SKenneth D. Merry 		return;
534130f4520SKenneth D. Merry 	}
535130f4520SKenneth D. Merry 
536130f4520SKenneth D. Merry 	/*
53711b569f7SAlexander Motin 	 * If this is a write, a flush, a delete or verify, we're all done.
538130f4520SKenneth D. Merry 	 * If this is a read, we can now send the data to the user.
539130f4520SKenneth D. Merry 	 */
540130f4520SKenneth D. Merry 	if ((beio->bio_cmd == BIO_WRITE)
541ee7f31c0SAlexander Motin 	 || (beio->bio_cmd == BIO_FLUSH)
54211b569f7SAlexander Motin 	 || (beio->bio_cmd == BIO_DELETE)
54311b569f7SAlexander Motin 	 || (ARGS(io)->flags & CTL_LLF_VERIFY)) {
544130f4520SKenneth D. Merry 		ctl_set_success(&io->scsiio);
545130f4520SKenneth D. Merry 		ctl_complete_beio(beio);
546130f4520SKenneth D. Merry 	} else {
547f7241cceSAlexander Motin 		if ((ARGS(io)->flags & CTL_LLF_READ) &&
548f7241cceSAlexander Motin 		    beio->beio_cont == NULL)
549f7241cceSAlexander Motin 			ctl_set_success(&io->scsiio);
550130f4520SKenneth D. Merry #ifdef CTL_TIME_IO
551130f4520SKenneth D. Merry         	getbintime(&io->io_hdr.dma_start_bt);
552130f4520SKenneth D. Merry #endif
553130f4520SKenneth D. Merry 		ctl_datamove(io);
554130f4520SKenneth D. Merry 	}
555130f4520SKenneth D. Merry }
556130f4520SKenneth D. Merry 
557130f4520SKenneth D. Merry static void
558130f4520SKenneth D. Merry ctl_be_block_flush_file(struct ctl_be_block_lun *be_lun,
559130f4520SKenneth D. Merry 			struct ctl_be_block_io *beio)
560130f4520SKenneth D. Merry {
56175c7a1d3SAlexander Motin 	union ctl_io *io = beio->io;
562130f4520SKenneth D. Merry 	struct mount *mountpoint;
5635050aa86SKonstantin Belousov 	int error, lock_flags;
564130f4520SKenneth D. Merry 
565130f4520SKenneth D. Merry 	DPRINTF("entered\n");
566130f4520SKenneth D. Merry 
56775c7a1d3SAlexander Motin 	binuptime(&beio->ds_t0);
56875c7a1d3SAlexander Motin 	mtx_lock(&be_lun->io_lock);
56975c7a1d3SAlexander Motin 	devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0);
57075c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
571130f4520SKenneth D. Merry 
572130f4520SKenneth D. Merry 	(void) vn_start_write(be_lun->vn, &mountpoint, V_WAIT);
573130f4520SKenneth D. Merry 
574130f4520SKenneth D. Merry 	if (MNT_SHARED_WRITES(mountpoint)
575130f4520SKenneth D. Merry 	 || ((mountpoint == NULL)
576130f4520SKenneth D. Merry 	  && MNT_SHARED_WRITES(be_lun->vn->v_mount)))
577130f4520SKenneth D. Merry 		lock_flags = LK_SHARED;
578130f4520SKenneth D. Merry 	else
579130f4520SKenneth D. Merry 		lock_flags = LK_EXCLUSIVE;
580130f4520SKenneth D. Merry 
581130f4520SKenneth D. Merry 	vn_lock(be_lun->vn, lock_flags | LK_RETRY);
582130f4520SKenneth D. Merry 
5837d0d4342SAlexander Motin 	error = VOP_FSYNC(be_lun->vn, beio->io_arg ? MNT_NOWAIT : MNT_WAIT,
5847d0d4342SAlexander Motin 	    curthread);
585130f4520SKenneth D. Merry 	VOP_UNLOCK(be_lun->vn, 0);
586130f4520SKenneth D. Merry 
587130f4520SKenneth D. Merry 	vn_finished_write(mountpoint);
588130f4520SKenneth D. Merry 
58975c7a1d3SAlexander Motin 	mtx_lock(&be_lun->io_lock);
59075c7a1d3SAlexander Motin 	devstat_end_transaction(beio->lun->disk_stats, beio->io_len,
59175c7a1d3SAlexander Motin 	    beio->ds_tag_type, beio->ds_trans_type,
59275c7a1d3SAlexander Motin 	    /*now*/ NULL, /*then*/&beio->ds_t0);
59375c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
59475c7a1d3SAlexander Motin 
595130f4520SKenneth D. Merry 	if (error == 0)
596130f4520SKenneth D. Merry 		ctl_set_success(&io->scsiio);
597130f4520SKenneth D. Merry 	else {
598130f4520SKenneth D. Merry 		/* XXX KDM is there is a better error here? */
599130f4520SKenneth D. Merry 		ctl_set_internal_failure(&io->scsiio,
600130f4520SKenneth D. Merry 					 /*sks_valid*/ 1,
601130f4520SKenneth D. Merry 					 /*retry_count*/ 0xbad1);
602130f4520SKenneth D. Merry 	}
603130f4520SKenneth D. Merry 
604130f4520SKenneth D. Merry 	ctl_complete_beio(beio);
605130f4520SKenneth D. Merry }
606130f4520SKenneth D. Merry 
607d9fae5abSAndriy Gapon SDT_PROBE_DEFINE1(cbb, kernel, read, file_start, "uint64_t");
608d9fae5abSAndriy Gapon SDT_PROBE_DEFINE1(cbb, kernel, write, file_start, "uint64_t");
609d9fae5abSAndriy Gapon SDT_PROBE_DEFINE1(cbb, kernel, read, file_done,"uint64_t");
610d9fae5abSAndriy Gapon SDT_PROBE_DEFINE1(cbb, kernel, write, file_done, "uint64_t");
611130f4520SKenneth D. Merry 
612130f4520SKenneth D. Merry static void
613130f4520SKenneth D. Merry ctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun,
614130f4520SKenneth D. Merry 			   struct ctl_be_block_io *beio)
615130f4520SKenneth D. Merry {
616130f4520SKenneth D. Merry 	struct ctl_be_block_filedata *file_data;
617130f4520SKenneth D. Merry 	union ctl_io *io;
618130f4520SKenneth D. Merry 	struct uio xuio;
619130f4520SKenneth D. Merry 	struct iovec *xiovec;
6205050aa86SKonstantin Belousov 	int flags;
621130f4520SKenneth D. Merry 	int error, i;
622130f4520SKenneth D. Merry 
623130f4520SKenneth D. Merry 	DPRINTF("entered\n");
624130f4520SKenneth D. Merry 
625130f4520SKenneth D. Merry 	file_data = &be_lun->backend.file;
626130f4520SKenneth D. Merry 	io = beio->io;
62755551d05SAlexander Motin 	flags = 0;
62855551d05SAlexander Motin 	if (ARGS(io)->flags & CTL_LLF_DPO)
62955551d05SAlexander Motin 		flags |= IO_DIRECT;
63055551d05SAlexander Motin 	if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA)
63155551d05SAlexander Motin 		flags |= IO_SYNC;
632130f4520SKenneth D. Merry 
63311b569f7SAlexander Motin 	bzero(&xuio, sizeof(xuio));
634130f4520SKenneth D. Merry 	if (beio->bio_cmd == BIO_READ) {
635130f4520SKenneth D. Merry 		SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0);
63611b569f7SAlexander Motin 		xuio.uio_rw = UIO_READ;
637130f4520SKenneth D. Merry 	} else {
638130f4520SKenneth D. Merry 		SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0);
639130f4520SKenneth D. Merry 		xuio.uio_rw = UIO_WRITE;
64011b569f7SAlexander Motin 	}
641130f4520SKenneth D. Merry 	xuio.uio_offset = beio->io_offset;
642130f4520SKenneth D. Merry 	xuio.uio_resid = beio->io_len;
643130f4520SKenneth D. Merry 	xuio.uio_segflg = UIO_SYSSPACE;
644130f4520SKenneth D. Merry 	xuio.uio_iov = beio->xiovecs;
645130f4520SKenneth D. Merry 	xuio.uio_iovcnt = beio->num_segs;
646130f4520SKenneth D. Merry 	xuio.uio_td = curthread;
647130f4520SKenneth D. Merry 
648130f4520SKenneth D. Merry 	for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) {
649130f4520SKenneth D. Merry 		xiovec->iov_base = beio->sg_segs[i].addr;
650130f4520SKenneth D. Merry 		xiovec->iov_len = beio->sg_segs[i].len;
651130f4520SKenneth D. Merry 	}
652130f4520SKenneth D. Merry 
65375c7a1d3SAlexander Motin 	binuptime(&beio->ds_t0);
65475c7a1d3SAlexander Motin 	mtx_lock(&be_lun->io_lock);
65575c7a1d3SAlexander Motin 	devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0);
65675c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
65775c7a1d3SAlexander Motin 
658130f4520SKenneth D. Merry 	if (beio->bio_cmd == BIO_READ) {
659130f4520SKenneth D. Merry 		vn_lock(be_lun->vn, LK_SHARED | LK_RETRY);
660130f4520SKenneth D. Merry 
661130f4520SKenneth D. Merry 		/*
662130f4520SKenneth D. Merry 		 * UFS pays attention to IO_DIRECT for reads.  If the
663130f4520SKenneth D. Merry 		 * DIRECTIO option is configured into the kernel, it calls
664130f4520SKenneth D. Merry 		 * ffs_rawread().  But that only works for single-segment
665130f4520SKenneth D. Merry 		 * uios with user space addresses.  In our case, with a
666130f4520SKenneth D. Merry 		 * kernel uio, it still reads into the buffer cache, but it
667130f4520SKenneth D. Merry 		 * will just try to release the buffer from the cache later
668130f4520SKenneth D. Merry 		 * on in ffs_read().
669130f4520SKenneth D. Merry 		 *
670130f4520SKenneth D. Merry 		 * ZFS does not pay attention to IO_DIRECT for reads.
671130f4520SKenneth D. Merry 		 *
672130f4520SKenneth D. Merry 		 * UFS does not pay attention to IO_SYNC for reads.
673130f4520SKenneth D. Merry 		 *
674130f4520SKenneth D. Merry 		 * ZFS pays attention to IO_SYNC (which translates into the
675130f4520SKenneth D. Merry 		 * Solaris define FRSYNC for zfs_read()) for reads.  It
676130f4520SKenneth D. Merry 		 * attempts to sync the file before reading.
677130f4520SKenneth D. Merry 		 */
67855551d05SAlexander Motin 		error = VOP_READ(be_lun->vn, &xuio, flags, file_data->cred);
679130f4520SKenneth D. Merry 
680130f4520SKenneth D. Merry 		VOP_UNLOCK(be_lun->vn, 0);
68111b569f7SAlexander Motin 		SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0);
682130f4520SKenneth D. Merry 	} else {
683130f4520SKenneth D. Merry 		struct mount *mountpoint;
684130f4520SKenneth D. Merry 		int lock_flags;
685130f4520SKenneth D. Merry 
686130f4520SKenneth D. Merry 		(void)vn_start_write(be_lun->vn, &mountpoint, V_WAIT);
687130f4520SKenneth D. Merry 
688130f4520SKenneth D. Merry 		if (MNT_SHARED_WRITES(mountpoint)
689130f4520SKenneth D. Merry 		 || ((mountpoint == NULL)
690130f4520SKenneth D. Merry 		  && MNT_SHARED_WRITES(be_lun->vn->v_mount)))
691130f4520SKenneth D. Merry 			lock_flags = LK_SHARED;
692130f4520SKenneth D. Merry 		else
693130f4520SKenneth D. Merry 			lock_flags = LK_EXCLUSIVE;
694130f4520SKenneth D. Merry 
695130f4520SKenneth D. Merry 		vn_lock(be_lun->vn, lock_flags | LK_RETRY);
696130f4520SKenneth D. Merry 
697130f4520SKenneth D. Merry 		/*
698130f4520SKenneth D. Merry 		 * UFS pays attention to IO_DIRECT for writes.  The write
699130f4520SKenneth D. Merry 		 * is done asynchronously.  (Normally the write would just
700130f4520SKenneth D. Merry 		 * get put into cache.
701130f4520SKenneth D. Merry 		 *
702130f4520SKenneth D. Merry 		 * UFS pays attention to IO_SYNC for writes.  It will
703130f4520SKenneth D. Merry 		 * attempt to write the buffer out synchronously if that
704130f4520SKenneth D. Merry 		 * flag is set.
705130f4520SKenneth D. Merry 		 *
706130f4520SKenneth D. Merry 		 * ZFS does not pay attention to IO_DIRECT for writes.
707130f4520SKenneth D. Merry 		 *
708130f4520SKenneth D. Merry 		 * ZFS pays attention to IO_SYNC (a.k.a. FSYNC or FRSYNC)
709130f4520SKenneth D. Merry 		 * for writes.  It will flush the transaction from the
710130f4520SKenneth D. Merry 		 * cache before returning.
711130f4520SKenneth D. Merry 		 */
71255551d05SAlexander Motin 		error = VOP_WRITE(be_lun->vn, &xuio, flags, file_data->cred);
713130f4520SKenneth D. Merry 		VOP_UNLOCK(be_lun->vn, 0);
714130f4520SKenneth D. Merry 
715130f4520SKenneth D. Merry 		vn_finished_write(mountpoint);
71611b569f7SAlexander Motin 		SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0);
717130f4520SKenneth D. Merry         }
718130f4520SKenneth D. Merry 
71975c7a1d3SAlexander Motin 	mtx_lock(&be_lun->io_lock);
72075c7a1d3SAlexander Motin 	devstat_end_transaction(beio->lun->disk_stats, beio->io_len,
72175c7a1d3SAlexander Motin 	    beio->ds_tag_type, beio->ds_trans_type,
72275c7a1d3SAlexander Motin 	    /*now*/ NULL, /*then*/&beio->ds_t0);
72375c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
72475c7a1d3SAlexander Motin 
725130f4520SKenneth D. Merry 	/*
726130f4520SKenneth D. Merry 	 * If we got an error, set the sense data to "MEDIUM ERROR" and
727130f4520SKenneth D. Merry 	 * return the I/O to the user.
728130f4520SKenneth D. Merry 	 */
729130f4520SKenneth D. Merry 	if (error != 0) {
730130f4520SKenneth D. Merry 		char path_str[32];
731130f4520SKenneth D. Merry 
732130f4520SKenneth D. Merry 		ctl_scsi_path_string(io, path_str, sizeof(path_str));
733130f4520SKenneth D. Merry 		printf("%s%s command returned errno %d\n", path_str,
734130f4520SKenneth D. Merry 		       (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", error);
7350631de4aSAlexander Motin 		if (error == ENOSPC || error == EDQUOT) {
7364fc18ff9SAlexander Motin 			ctl_set_space_alloc_fail(&io->scsiio);
7374fc18ff9SAlexander Motin 		} else
738130f4520SKenneth D. Merry 			ctl_set_medium_error(&io->scsiio);
739130f4520SKenneth D. Merry 		ctl_complete_beio(beio);
740130f4520SKenneth D. Merry 		return;
741130f4520SKenneth D. Merry 	}
742130f4520SKenneth D. Merry 
743130f4520SKenneth D. Merry 	/*
744696297adSAlexander Motin 	 * If this is a write or a verify, we're all done.
745130f4520SKenneth D. Merry 	 * If this is a read, we can now send the data to the user.
746130f4520SKenneth D. Merry 	 */
747696297adSAlexander Motin 	if ((beio->bio_cmd == BIO_WRITE) ||
748696297adSAlexander Motin 	    (ARGS(io)->flags & CTL_LLF_VERIFY)) {
749130f4520SKenneth D. Merry 		ctl_set_success(&io->scsiio);
750130f4520SKenneth D. Merry 		ctl_complete_beio(beio);
751130f4520SKenneth D. Merry 	} else {
752f7241cceSAlexander Motin 		if ((ARGS(io)->flags & CTL_LLF_READ) &&
753f7241cceSAlexander Motin 		    beio->beio_cont == NULL)
754f7241cceSAlexander Motin 			ctl_set_success(&io->scsiio);
755130f4520SKenneth D. Merry #ifdef CTL_TIME_IO
756130f4520SKenneth D. Merry         	getbintime(&io->io_hdr.dma_start_bt);
757130f4520SKenneth D. Merry #endif
758130f4520SKenneth D. Merry 		ctl_datamove(io);
759130f4520SKenneth D. Merry 	}
760130f4520SKenneth D. Merry }
761130f4520SKenneth D. Merry 
762130f4520SKenneth D. Merry static void
763ef8daf3fSAlexander Motin ctl_be_block_gls_file(struct ctl_be_block_lun *be_lun,
764ef8daf3fSAlexander Motin 			struct ctl_be_block_io *beio)
765ef8daf3fSAlexander Motin {
766ef8daf3fSAlexander Motin 	union ctl_io *io = beio->io;
767ef8daf3fSAlexander Motin 	struct ctl_lba_len_flags *lbalen = ARGS(io);
768ef8daf3fSAlexander Motin 	struct scsi_get_lba_status_data *data;
769ef8daf3fSAlexander Motin 	off_t roff, off;
770ef8daf3fSAlexander Motin 	int error, status;
771ef8daf3fSAlexander Motin 
772ef8daf3fSAlexander Motin 	DPRINTF("entered\n");
773ef8daf3fSAlexander Motin 
774*a15bbf15SAlexander Motin 	off = roff = ((off_t)lbalen->lba) * be_lun->blocksize;
775ef8daf3fSAlexander Motin 	vn_lock(be_lun->vn, LK_SHARED | LK_RETRY);
776ef8daf3fSAlexander Motin 	error = VOP_IOCTL(be_lun->vn, FIOSEEKHOLE, &off,
777ef8daf3fSAlexander Motin 	    0, curthread->td_ucred, curthread);
778ef8daf3fSAlexander Motin 	if (error == 0 && off > roff)
779ef8daf3fSAlexander Motin 		status = 0;	/* mapped up to off */
780ef8daf3fSAlexander Motin 	else {
781ef8daf3fSAlexander Motin 		error = VOP_IOCTL(be_lun->vn, FIOSEEKDATA, &off,
782ef8daf3fSAlexander Motin 		    0, curthread->td_ucred, curthread);
783ef8daf3fSAlexander Motin 		if (error == 0 && off > roff)
784ef8daf3fSAlexander Motin 			status = 1;	/* deallocated up to off */
785ef8daf3fSAlexander Motin 		else {
786ef8daf3fSAlexander Motin 			status = 0;	/* unknown up to the end */
787ef8daf3fSAlexander Motin 			off = be_lun->size_bytes;
788ef8daf3fSAlexander Motin 		}
789ef8daf3fSAlexander Motin 	}
790ef8daf3fSAlexander Motin 	VOP_UNLOCK(be_lun->vn, 0);
791ef8daf3fSAlexander Motin 
792ef8daf3fSAlexander Motin 	data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr;
793ef8daf3fSAlexander Motin 	scsi_u64to8b(lbalen->lba, data->descr[0].addr);
794*a15bbf15SAlexander Motin 	scsi_ulto4b(MIN(UINT32_MAX, off / be_lun->blocksize - lbalen->lba),
795ef8daf3fSAlexander Motin 	    data->descr[0].length);
796ef8daf3fSAlexander Motin 	data->descr[0].status = status;
797ef8daf3fSAlexander Motin 
798ef8daf3fSAlexander Motin 	ctl_complete_beio(beio);
799ef8daf3fSAlexander Motin }
800ef8daf3fSAlexander Motin 
80153c146deSAlexander Motin static uint64_t
80253c146deSAlexander Motin ctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, const char *attrname)
80353c146deSAlexander Motin {
80453c146deSAlexander Motin 	struct vattr		vattr;
80553c146deSAlexander Motin 	struct statfs		statfs;
806b9b4269cSAlexander Motin 	uint64_t		val;
80753c146deSAlexander Motin 	int			error;
80853c146deSAlexander Motin 
809b9b4269cSAlexander Motin 	val = UINT64_MAX;
81053c146deSAlexander Motin 	if (be_lun->vn == NULL)
811b9b4269cSAlexander Motin 		return (val);
812b9b4269cSAlexander Motin 	vn_lock(be_lun->vn, LK_SHARED | LK_RETRY);
81353c146deSAlexander Motin 	if (strcmp(attrname, "blocksused") == 0) {
81453c146deSAlexander Motin 		error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred);
815b9b4269cSAlexander Motin 		if (error == 0)
816*a15bbf15SAlexander Motin 			val = vattr.va_bytes / be_lun->blocksize;
81753c146deSAlexander Motin 	}
818b9b4269cSAlexander Motin 	if (strcmp(attrname, "blocksavail") == 0 &&
819b9b4269cSAlexander Motin 	    (be_lun->vn->v_iflag & VI_DOOMED) == 0) {
82053c146deSAlexander Motin 		error = VFS_STATFS(be_lun->vn->v_mount, &statfs);
821b9b4269cSAlexander Motin 		if (error == 0)
822*a15bbf15SAlexander Motin 			val = statfs.f_bavail * statfs.f_bsize /
823*a15bbf15SAlexander Motin 			    be_lun->blocksize;
82453c146deSAlexander Motin 	}
825b9b4269cSAlexander Motin 	VOP_UNLOCK(be_lun->vn, 0);
826b9b4269cSAlexander Motin 	return (val);
82753c146deSAlexander Motin }
82853c146deSAlexander Motin 
829ef8daf3fSAlexander Motin static void
83067f586a8SAlexander Motin ctl_be_block_dispatch_zvol(struct ctl_be_block_lun *be_lun,
83167f586a8SAlexander Motin 			   struct ctl_be_block_io *beio)
83267f586a8SAlexander Motin {
83367f586a8SAlexander Motin 	struct ctl_be_block_devdata *dev_data;
83467f586a8SAlexander Motin 	union ctl_io *io;
83567f586a8SAlexander Motin 	struct uio xuio;
83667f586a8SAlexander Motin 	struct iovec *xiovec;
83767f586a8SAlexander Motin 	int flags;
83867f586a8SAlexander Motin 	int error, i;
83967f586a8SAlexander Motin 
84067f586a8SAlexander Motin 	DPRINTF("entered\n");
84167f586a8SAlexander Motin 
84267f586a8SAlexander Motin 	dev_data = &be_lun->backend.dev;
84367f586a8SAlexander Motin 	io = beio->io;
84455551d05SAlexander Motin 	flags = 0;
84555551d05SAlexander Motin 	if (ARGS(io)->flags & CTL_LLF_DPO)
84655551d05SAlexander Motin 		flags |= IO_DIRECT;
84755551d05SAlexander Motin 	if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA)
84855551d05SAlexander Motin 		flags |= IO_SYNC;
84967f586a8SAlexander Motin 
85067f586a8SAlexander Motin 	bzero(&xuio, sizeof(xuio));
85167f586a8SAlexander Motin 	if (beio->bio_cmd == BIO_READ) {
85267f586a8SAlexander Motin 		SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0);
85367f586a8SAlexander Motin 		xuio.uio_rw = UIO_READ;
85467f586a8SAlexander Motin 	} else {
85567f586a8SAlexander Motin 		SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0);
85667f586a8SAlexander Motin 		xuio.uio_rw = UIO_WRITE;
85767f586a8SAlexander Motin 	}
85867f586a8SAlexander Motin 	xuio.uio_offset = beio->io_offset;
85967f586a8SAlexander Motin 	xuio.uio_resid = beio->io_len;
86067f586a8SAlexander Motin 	xuio.uio_segflg = UIO_SYSSPACE;
86167f586a8SAlexander Motin 	xuio.uio_iov = beio->xiovecs;
86267f586a8SAlexander Motin 	xuio.uio_iovcnt = beio->num_segs;
86367f586a8SAlexander Motin 	xuio.uio_td = curthread;
86467f586a8SAlexander Motin 
86567f586a8SAlexander Motin 	for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) {
86667f586a8SAlexander Motin 		xiovec->iov_base = beio->sg_segs[i].addr;
86767f586a8SAlexander Motin 		xiovec->iov_len = beio->sg_segs[i].len;
86867f586a8SAlexander Motin 	}
86967f586a8SAlexander Motin 
87067f586a8SAlexander Motin 	binuptime(&beio->ds_t0);
87167f586a8SAlexander Motin 	mtx_lock(&be_lun->io_lock);
87267f586a8SAlexander Motin 	devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0);
87367f586a8SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
87467f586a8SAlexander Motin 
87567f586a8SAlexander Motin 	if (beio->bio_cmd == BIO_READ) {
87655551d05SAlexander Motin 		error = (*dev_data->csw->d_read)(dev_data->cdev, &xuio, flags);
87767f586a8SAlexander Motin 		SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0);
87867f586a8SAlexander Motin 	} else {
87955551d05SAlexander Motin 		error = (*dev_data->csw->d_write)(dev_data->cdev, &xuio, flags);
88067f586a8SAlexander Motin 		SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0);
88167f586a8SAlexander Motin 	}
88267f586a8SAlexander Motin 
88367f586a8SAlexander Motin 	mtx_lock(&be_lun->io_lock);
88467f586a8SAlexander Motin 	devstat_end_transaction(beio->lun->disk_stats, beio->io_len,
88567f586a8SAlexander Motin 	    beio->ds_tag_type, beio->ds_trans_type,
88667f586a8SAlexander Motin 	    /*now*/ NULL, /*then*/&beio->ds_t0);
88767f586a8SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
88867f586a8SAlexander Motin 
88967f586a8SAlexander Motin 	/*
89067f586a8SAlexander Motin 	 * If we got an error, set the sense data to "MEDIUM ERROR" and
89167f586a8SAlexander Motin 	 * return the I/O to the user.
89267f586a8SAlexander Motin 	 */
89367f586a8SAlexander Motin 	if (error != 0) {
8940631de4aSAlexander Motin 		if (error == ENOSPC || error == EDQUOT) {
8954fc18ff9SAlexander Motin 			ctl_set_space_alloc_fail(&io->scsiio);
8964fc18ff9SAlexander Motin 		} else
89767f586a8SAlexander Motin 			ctl_set_medium_error(&io->scsiio);
89867f586a8SAlexander Motin 		ctl_complete_beio(beio);
89967f586a8SAlexander Motin 		return;
90067f586a8SAlexander Motin 	}
90167f586a8SAlexander Motin 
90267f586a8SAlexander Motin 	/*
90367f586a8SAlexander Motin 	 * If this is a write or a verify, we're all done.
90467f586a8SAlexander Motin 	 * If this is a read, we can now send the data to the user.
90567f586a8SAlexander Motin 	 */
90667f586a8SAlexander Motin 	if ((beio->bio_cmd == BIO_WRITE) ||
90767f586a8SAlexander Motin 	    (ARGS(io)->flags & CTL_LLF_VERIFY)) {
90867f586a8SAlexander Motin 		ctl_set_success(&io->scsiio);
90967f586a8SAlexander Motin 		ctl_complete_beio(beio);
91067f586a8SAlexander Motin 	} else {
911f7241cceSAlexander Motin 		if ((ARGS(io)->flags & CTL_LLF_READ) &&
912f7241cceSAlexander Motin 		    beio->beio_cont == NULL)
913f7241cceSAlexander Motin 			ctl_set_success(&io->scsiio);
91467f586a8SAlexander Motin #ifdef CTL_TIME_IO
91567f586a8SAlexander Motin         	getbintime(&io->io_hdr.dma_start_bt);
91667f586a8SAlexander Motin #endif
91767f586a8SAlexander Motin 		ctl_datamove(io);
91867f586a8SAlexander Motin 	}
91967f586a8SAlexander Motin }
92067f586a8SAlexander Motin 
92167f586a8SAlexander Motin static void
922ef8daf3fSAlexander Motin ctl_be_block_gls_zvol(struct ctl_be_block_lun *be_lun,
923ef8daf3fSAlexander Motin 			struct ctl_be_block_io *beio)
924ef8daf3fSAlexander Motin {
925ef8daf3fSAlexander Motin 	struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev;
926ef8daf3fSAlexander Motin 	union ctl_io *io = beio->io;
927ef8daf3fSAlexander Motin 	struct ctl_lba_len_flags *lbalen = ARGS(io);
928ef8daf3fSAlexander Motin 	struct scsi_get_lba_status_data *data;
929ef8daf3fSAlexander Motin 	off_t roff, off;
930ef8daf3fSAlexander Motin 	int error, status;
931ef8daf3fSAlexander Motin 
932ef8daf3fSAlexander Motin 	DPRINTF("entered\n");
933ef8daf3fSAlexander Motin 
934*a15bbf15SAlexander Motin 	off = roff = ((off_t)lbalen->lba) * be_lun->blocksize;
935ef8daf3fSAlexander Motin 	error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKHOLE,
936ef8daf3fSAlexander Motin 	    (caddr_t)&off, FREAD, curthread);
937ef8daf3fSAlexander Motin 	if (error == 0 && off > roff)
938ef8daf3fSAlexander Motin 		status = 0;	/* mapped up to off */
939ef8daf3fSAlexander Motin 	else {
940ef8daf3fSAlexander Motin 		error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKDATA,
941ef8daf3fSAlexander Motin 		    (caddr_t)&off, FREAD, curthread);
942ef8daf3fSAlexander Motin 		if (error == 0 && off > roff)
943ef8daf3fSAlexander Motin 			status = 1;	/* deallocated up to off */
944ef8daf3fSAlexander Motin 		else {
945ef8daf3fSAlexander Motin 			status = 0;	/* unknown up to the end */
946ef8daf3fSAlexander Motin 			off = be_lun->size_bytes;
947ef8daf3fSAlexander Motin 		}
948ef8daf3fSAlexander Motin 	}
949ef8daf3fSAlexander Motin 
950ef8daf3fSAlexander Motin 	data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr;
951ef8daf3fSAlexander Motin 	scsi_u64to8b(lbalen->lba, data->descr[0].addr);
952*a15bbf15SAlexander Motin 	scsi_ulto4b(MIN(UINT32_MAX, off / be_lun->blocksize - lbalen->lba),
953ef8daf3fSAlexander Motin 	    data->descr[0].length);
954ef8daf3fSAlexander Motin 	data->descr[0].status = status;
955ef8daf3fSAlexander Motin 
956ef8daf3fSAlexander Motin 	ctl_complete_beio(beio);
957ef8daf3fSAlexander Motin }
958ef8daf3fSAlexander Motin 
959ef8daf3fSAlexander Motin static void
960130f4520SKenneth D. Merry ctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun,
961130f4520SKenneth D. Merry 		       struct ctl_be_block_io *beio)
962130f4520SKenneth D. Merry {
963130f4520SKenneth D. Merry 	struct bio *bio;
964130f4520SKenneth D. Merry 	union ctl_io *io;
965130f4520SKenneth D. Merry 	struct ctl_be_block_devdata *dev_data;
966130f4520SKenneth D. Merry 
967130f4520SKenneth D. Merry 	dev_data = &be_lun->backend.dev;
968130f4520SKenneth D. Merry 	io = beio->io;
969130f4520SKenneth D. Merry 
970130f4520SKenneth D. Merry 	DPRINTF("entered\n");
971130f4520SKenneth D. Merry 
972130f4520SKenneth D. Merry 	/* This can't fail, it's a blocking allocation. */
973130f4520SKenneth D. Merry 	bio = g_alloc_bio();
974130f4520SKenneth D. Merry 
975130f4520SKenneth D. Merry 	bio->bio_cmd	    = BIO_FLUSH;
976130f4520SKenneth D. Merry 	bio->bio_dev	    = dev_data->cdev;
977130f4520SKenneth D. Merry 	bio->bio_offset	    = 0;
978130f4520SKenneth D. Merry 	bio->bio_data	    = 0;
979130f4520SKenneth D. Merry 	bio->bio_done	    = ctl_be_block_biodone;
980130f4520SKenneth D. Merry 	bio->bio_caller1    = beio;
981130f4520SKenneth D. Merry 	bio->bio_pblkno	    = 0;
982130f4520SKenneth D. Merry 
983130f4520SKenneth D. Merry 	/*
984130f4520SKenneth D. Merry 	 * We don't need to acquire the LUN lock here, because we are only
985130f4520SKenneth D. Merry 	 * sending one bio, and so there is no other context to synchronize
986130f4520SKenneth D. Merry 	 * with.
987130f4520SKenneth D. Merry 	 */
988130f4520SKenneth D. Merry 	beio->num_bios_sent = 1;
989130f4520SKenneth D. Merry 	beio->send_complete = 1;
990130f4520SKenneth D. Merry 
991130f4520SKenneth D. Merry 	binuptime(&beio->ds_t0);
99275c7a1d3SAlexander Motin 	mtx_lock(&be_lun->io_lock);
993130f4520SKenneth D. Merry 	devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0);
99475c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
995130f4520SKenneth D. Merry 
996130f4520SKenneth D. Merry 	(*dev_data->csw->d_strategy)(bio);
997130f4520SKenneth D. Merry }
998130f4520SKenneth D. Merry 
999130f4520SKenneth D. Merry static void
1000ee7f31c0SAlexander Motin ctl_be_block_unmap_dev_range(struct ctl_be_block_lun *be_lun,
1001ee7f31c0SAlexander Motin 		       struct ctl_be_block_io *beio,
1002ee7f31c0SAlexander Motin 		       uint64_t off, uint64_t len, int last)
1003ee7f31c0SAlexander Motin {
1004ee7f31c0SAlexander Motin 	struct bio *bio;
1005ee7f31c0SAlexander Motin 	struct ctl_be_block_devdata *dev_data;
10068f5a226aSAlexander Motin 	uint64_t maxlen;
1007ee7f31c0SAlexander Motin 
1008ee7f31c0SAlexander Motin 	dev_data = &be_lun->backend.dev;
10098f5a226aSAlexander Motin 	maxlen = LONG_MAX - (LONG_MAX % be_lun->blocksize);
1010ee7f31c0SAlexander Motin 	while (len > 0) {
1011ee7f31c0SAlexander Motin 		bio = g_alloc_bio();
1012ee7f31c0SAlexander Motin 		bio->bio_cmd	    = BIO_DELETE;
1013ee7f31c0SAlexander Motin 		bio->bio_dev	    = dev_data->cdev;
1014ee7f31c0SAlexander Motin 		bio->bio_offset	    = off;
10158f5a226aSAlexander Motin 		bio->bio_length	    = MIN(len, maxlen);
1016ee7f31c0SAlexander Motin 		bio->bio_data	    = 0;
1017ee7f31c0SAlexander Motin 		bio->bio_done	    = ctl_be_block_biodone;
1018ee7f31c0SAlexander Motin 		bio->bio_caller1    = beio;
10198f5a226aSAlexander Motin 		bio->bio_pblkno     = off / be_lun->blocksize;
1020ee7f31c0SAlexander Motin 
1021ee7f31c0SAlexander Motin 		off += bio->bio_length;
1022ee7f31c0SAlexander Motin 		len -= bio->bio_length;
1023ee7f31c0SAlexander Motin 
102475c7a1d3SAlexander Motin 		mtx_lock(&be_lun->io_lock);
1025ee7f31c0SAlexander Motin 		beio->num_bios_sent++;
1026ee7f31c0SAlexander Motin 		if (last && len == 0)
1027ee7f31c0SAlexander Motin 			beio->send_complete = 1;
102875c7a1d3SAlexander Motin 		mtx_unlock(&be_lun->io_lock);
1029ee7f31c0SAlexander Motin 
1030ee7f31c0SAlexander Motin 		(*dev_data->csw->d_strategy)(bio);
1031ee7f31c0SAlexander Motin 	}
1032ee7f31c0SAlexander Motin }
1033ee7f31c0SAlexander Motin 
1034ee7f31c0SAlexander Motin static void
1035ee7f31c0SAlexander Motin ctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun,
1036ee7f31c0SAlexander Motin 		       struct ctl_be_block_io *beio)
1037ee7f31c0SAlexander Motin {
1038ee7f31c0SAlexander Motin 	union ctl_io *io;
1039ee7f31c0SAlexander Motin 	struct ctl_be_block_devdata *dev_data;
104066df9136SAlexander Motin 	struct ctl_ptr_len_flags *ptrlen;
1041ee7f31c0SAlexander Motin 	struct scsi_unmap_desc *buf, *end;
1042ee7f31c0SAlexander Motin 	uint64_t len;
1043ee7f31c0SAlexander Motin 
1044ee7f31c0SAlexander Motin 	dev_data = &be_lun->backend.dev;
1045ee7f31c0SAlexander Motin 	io = beio->io;
1046ee7f31c0SAlexander Motin 
1047ee7f31c0SAlexander Motin 	DPRINTF("entered\n");
1048ee7f31c0SAlexander Motin 
1049ee7f31c0SAlexander Motin 	binuptime(&beio->ds_t0);
105075c7a1d3SAlexander Motin 	mtx_lock(&be_lun->io_lock);
1051ee7f31c0SAlexander Motin 	devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0);
105275c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
1053ee7f31c0SAlexander Motin 
1054ee7f31c0SAlexander Motin 	if (beio->io_offset == -1) {
1055ee7f31c0SAlexander Motin 		beio->io_len = 0;
105666df9136SAlexander Motin 		ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN];
105766df9136SAlexander Motin 		buf = (struct scsi_unmap_desc *)ptrlen->ptr;
105866df9136SAlexander Motin 		end = buf + ptrlen->len / sizeof(*buf);
1059ee7f31c0SAlexander Motin 		for (; buf < end; buf++) {
1060ee7f31c0SAlexander Motin 			len = (uint64_t)scsi_4btoul(buf->length) *
1061ee7f31c0SAlexander Motin 			    be_lun->blocksize;
1062ee7f31c0SAlexander Motin 			beio->io_len += len;
1063ee7f31c0SAlexander Motin 			ctl_be_block_unmap_dev_range(be_lun, beio,
1064ee7f31c0SAlexander Motin 			    scsi_8btou64(buf->lba) * be_lun->blocksize, len,
10657e0be022SAlexander Motin 			    (end - buf < 2) ? TRUE : FALSE);
1066ee7f31c0SAlexander Motin 		}
1067ee7f31c0SAlexander Motin 	} else
1068ee7f31c0SAlexander Motin 		ctl_be_block_unmap_dev_range(be_lun, beio,
1069ee7f31c0SAlexander Motin 		    beio->io_offset, beio->io_len, TRUE);
1070ee7f31c0SAlexander Motin }
1071ee7f31c0SAlexander Motin 
1072ee7f31c0SAlexander Motin static void
1073130f4520SKenneth D. Merry ctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun,
1074130f4520SKenneth D. Merry 			  struct ctl_be_block_io *beio)
1075130f4520SKenneth D. Merry {
107675c7a1d3SAlexander Motin 	TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue);
1077130f4520SKenneth D. Merry 	int i;
1078130f4520SKenneth D. Merry 	struct bio *bio;
1079130f4520SKenneth D. Merry 	struct ctl_be_block_devdata *dev_data;
1080130f4520SKenneth D. Merry 	off_t cur_offset;
1081130f4520SKenneth D. Merry 	int max_iosize;
1082130f4520SKenneth D. Merry 
1083130f4520SKenneth D. Merry 	DPRINTF("entered\n");
1084130f4520SKenneth D. Merry 
1085130f4520SKenneth D. Merry 	dev_data = &be_lun->backend.dev;
1086130f4520SKenneth D. Merry 
1087130f4520SKenneth D. Merry 	/*
1088130f4520SKenneth D. Merry 	 * We have to limit our I/O size to the maximum supported by the
1089130f4520SKenneth D. Merry 	 * backend device.  Hopefully it is MAXPHYS.  If the driver doesn't
1090130f4520SKenneth D. Merry 	 * set it properly, use DFLTPHYS.
1091130f4520SKenneth D. Merry 	 */
1092130f4520SKenneth D. Merry 	max_iosize = dev_data->cdev->si_iosize_max;
1093130f4520SKenneth D. Merry 	if (max_iosize < PAGE_SIZE)
1094130f4520SKenneth D. Merry 		max_iosize = DFLTPHYS;
1095130f4520SKenneth D. Merry 
1096130f4520SKenneth D. Merry 	cur_offset = beio->io_offset;
1097130f4520SKenneth D. Merry 	for (i = 0; i < beio->num_segs; i++) {
1098130f4520SKenneth D. Merry 		size_t cur_size;
1099130f4520SKenneth D. Merry 		uint8_t *cur_ptr;
1100130f4520SKenneth D. Merry 
1101130f4520SKenneth D. Merry 		cur_size = beio->sg_segs[i].len;
1102130f4520SKenneth D. Merry 		cur_ptr = beio->sg_segs[i].addr;
1103130f4520SKenneth D. Merry 
1104130f4520SKenneth D. Merry 		while (cur_size > 0) {
1105130f4520SKenneth D. Merry 			/* This can't fail, it's a blocking allocation. */
1106130f4520SKenneth D. Merry 			bio = g_alloc_bio();
1107130f4520SKenneth D. Merry 
1108130f4520SKenneth D. Merry 			KASSERT(bio != NULL, ("g_alloc_bio() failed!\n"));
1109130f4520SKenneth D. Merry 
1110130f4520SKenneth D. Merry 			bio->bio_cmd = beio->bio_cmd;
1111130f4520SKenneth D. Merry 			bio->bio_dev = dev_data->cdev;
1112130f4520SKenneth D. Merry 			bio->bio_caller1 = beio;
1113130f4520SKenneth D. Merry 			bio->bio_length = min(cur_size, max_iosize);
1114130f4520SKenneth D. Merry 			bio->bio_offset = cur_offset;
1115130f4520SKenneth D. Merry 			bio->bio_data = cur_ptr;
1116130f4520SKenneth D. Merry 			bio->bio_done = ctl_be_block_biodone;
1117130f4520SKenneth D. Merry 			bio->bio_pblkno = cur_offset / be_lun->blocksize;
1118130f4520SKenneth D. Merry 
1119130f4520SKenneth D. Merry 			cur_offset += bio->bio_length;
1120130f4520SKenneth D. Merry 			cur_ptr += bio->bio_length;
1121130f4520SKenneth D. Merry 			cur_size -= bio->bio_length;
1122130f4520SKenneth D. Merry 
112375c7a1d3SAlexander Motin 			TAILQ_INSERT_TAIL(&queue, bio, bio_queue);
1124130f4520SKenneth D. Merry 			beio->num_bios_sent++;
1125130f4520SKenneth D. Merry 		}
1126130f4520SKenneth D. Merry 	}
112775c7a1d3SAlexander Motin 	binuptime(&beio->ds_t0);
112875c7a1d3SAlexander Motin 	mtx_lock(&be_lun->io_lock);
112975c7a1d3SAlexander Motin 	devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0);
113075c7a1d3SAlexander Motin 	beio->send_complete = 1;
113175c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->io_lock);
113275c7a1d3SAlexander Motin 
113375c7a1d3SAlexander Motin 	/*
113475c7a1d3SAlexander Motin 	 * Fire off all allocated requests!
113575c7a1d3SAlexander Motin 	 */
113675c7a1d3SAlexander Motin 	while ((bio = TAILQ_FIRST(&queue)) != NULL) {
113775c7a1d3SAlexander Motin 		TAILQ_REMOVE(&queue, bio, bio_queue);
113875c7a1d3SAlexander Motin 		(*dev_data->csw->d_strategy)(bio);
113975c7a1d3SAlexander Motin 	}
1140130f4520SKenneth D. Merry }
1141130f4520SKenneth D. Merry 
1142c3e7ba3eSAlexander Motin static uint64_t
1143c3e7ba3eSAlexander Motin ctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, const char *attrname)
1144c3e7ba3eSAlexander Motin {
1145c3e7ba3eSAlexander Motin 	struct ctl_be_block_devdata	*dev_data = &be_lun->backend.dev;
1146c3e7ba3eSAlexander Motin 	struct diocgattr_arg	arg;
1147c3e7ba3eSAlexander Motin 	int			error;
1148c3e7ba3eSAlexander Motin 
1149c3e7ba3eSAlexander Motin 	if (dev_data->csw == NULL || dev_data->csw->d_ioctl == NULL)
1150c3e7ba3eSAlexander Motin 		return (UINT64_MAX);
1151c3e7ba3eSAlexander Motin 	strlcpy(arg.name, attrname, sizeof(arg.name));
1152c3e7ba3eSAlexander Motin 	arg.len = sizeof(arg.value.off);
1153c3e7ba3eSAlexander Motin 	error = dev_data->csw->d_ioctl(dev_data->cdev,
1154c3e7ba3eSAlexander Motin 	    DIOCGATTR, (caddr_t)&arg, FREAD, curthread);
1155c3e7ba3eSAlexander Motin 	if (error != 0)
1156c3e7ba3eSAlexander Motin 		return (UINT64_MAX);
1157c3e7ba3eSAlexander Motin 	return (arg.value.off);
1158c3e7ba3eSAlexander Motin }
1159c3e7ba3eSAlexander Motin 
1160130f4520SKenneth D. Merry static void
11617d0d4342SAlexander Motin ctl_be_block_cw_dispatch_sync(struct ctl_be_block_lun *be_lun,
11627d0d4342SAlexander Motin 			    union ctl_io *io)
11637d0d4342SAlexander Motin {
11647d0d4342SAlexander Motin 	struct ctl_be_block_io *beio;
11657d0d4342SAlexander Motin 	struct ctl_lba_len_flags *lbalen;
11667d0d4342SAlexander Motin 
11677d0d4342SAlexander Motin 	DPRINTF("entered\n");
11687d0d4342SAlexander Motin 	beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
11697d0d4342SAlexander Motin 	lbalen = (struct ctl_lba_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN];
11707d0d4342SAlexander Motin 
11717d0d4342SAlexander Motin 	beio->io_len = lbalen->len * be_lun->blocksize;
11727d0d4342SAlexander Motin 	beio->io_offset = lbalen->lba * be_lun->blocksize;
11737d0d4342SAlexander Motin 	beio->io_arg = (lbalen->flags & SSC_IMMED) != 0;
11747d0d4342SAlexander Motin 	beio->bio_cmd = BIO_FLUSH;
11757d0d4342SAlexander Motin 	beio->ds_trans_type = DEVSTAT_NO_DATA;
11767d0d4342SAlexander Motin 	DPRINTF("SYNC\n");
11777d0d4342SAlexander Motin 	be_lun->lun_flush(be_lun, beio);
11787d0d4342SAlexander Motin }
11797d0d4342SAlexander Motin 
11807d0d4342SAlexander Motin static void
1181ee7f31c0SAlexander Motin ctl_be_block_cw_done_ws(struct ctl_be_block_io *beio)
1182ee7f31c0SAlexander Motin {
1183ee7f31c0SAlexander Motin 	union ctl_io *io;
1184ee7f31c0SAlexander Motin 
1185ee7f31c0SAlexander Motin 	io = beio->io;
1186ee7f31c0SAlexander Motin 	ctl_free_beio(beio);
1187ead2f117SAlexander Motin 	if ((io->io_hdr.flags & CTL_FLAG_ABORT) ||
1188ead2f117SAlexander Motin 	    ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE &&
1189ead2f117SAlexander Motin 	     (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) {
1190ee7f31c0SAlexander Motin 		ctl_config_write_done(io);
1191ee7f31c0SAlexander Motin 		return;
1192ee7f31c0SAlexander Motin 	}
1193ee7f31c0SAlexander Motin 
1194ee7f31c0SAlexander Motin 	ctl_be_block_config_write(io);
1195ee7f31c0SAlexander Motin }
1196ee7f31c0SAlexander Motin 
1197ee7f31c0SAlexander Motin static void
1198ee7f31c0SAlexander Motin ctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun,
1199ee7f31c0SAlexander Motin 			    union ctl_io *io)
1200ee7f31c0SAlexander Motin {
1201ee7f31c0SAlexander Motin 	struct ctl_be_block_io *beio;
120266df9136SAlexander Motin 	struct ctl_lba_len_flags *lbalen;
1203fee04ef7SAlexander Motin 	uint64_t len_left, lba;
1204fee04ef7SAlexander Motin 	uint32_t pb, pbo, adj;
1205ee7f31c0SAlexander Motin 	int i, seglen;
1206ee7f31c0SAlexander Motin 	uint8_t *buf, *end;
1207ee7f31c0SAlexander Motin 
1208ee7f31c0SAlexander Motin 	DPRINTF("entered\n");
1209ee7f31c0SAlexander Motin 
1210e86a4142SAlexander Motin 	beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
121111b569f7SAlexander Motin 	lbalen = ARGS(beio->io);
1212ee7f31c0SAlexander Motin 
121364c5167cSAlexander Motin 	if (lbalen->flags & ~(SWS_LBDATA | SWS_UNMAP | SWS_ANCHOR | SWS_NDOB) ||
12143406a2a0SAlexander Motin 	    (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR) && be_lun->unmap == NULL)) {
1215ee7f31c0SAlexander Motin 		ctl_free_beio(beio);
1216ee7f31c0SAlexander Motin 		ctl_set_invalid_field(&io->scsiio,
1217ee7f31c0SAlexander Motin 				      /*sks_valid*/ 1,
1218ee7f31c0SAlexander Motin 				      /*command*/ 1,
1219ee7f31c0SAlexander Motin 				      /*field*/ 1,
1220ee7f31c0SAlexander Motin 				      /*bit_valid*/ 0,
1221ee7f31c0SAlexander Motin 				      /*bit*/ 0);
1222ee7f31c0SAlexander Motin 		ctl_config_write_done(io);
1223ee7f31c0SAlexander Motin 		return;
1224ee7f31c0SAlexander Motin 	}
1225ee7f31c0SAlexander Motin 
12263406a2a0SAlexander Motin 	if (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR)) {
122766df9136SAlexander Motin 		beio->io_offset = lbalen->lba * be_lun->blocksize;
122866df9136SAlexander Motin 		beio->io_len = (uint64_t)lbalen->len * be_lun->blocksize;
1229ee7f31c0SAlexander Motin 		beio->bio_cmd = BIO_DELETE;
1230ee7f31c0SAlexander Motin 		beio->ds_trans_type = DEVSTAT_FREE;
1231ee7f31c0SAlexander Motin 
1232ee7f31c0SAlexander Motin 		be_lun->unmap(be_lun, beio);
1233ee7f31c0SAlexander Motin 		return;
1234ee7f31c0SAlexander Motin 	}
1235ee7f31c0SAlexander Motin 
1236ee7f31c0SAlexander Motin 	beio->bio_cmd = BIO_WRITE;
1237ee7f31c0SAlexander Motin 	beio->ds_trans_type = DEVSTAT_WRITE;
1238ee7f31c0SAlexander Motin 
1239ee7f31c0SAlexander Motin 	DPRINTF("WRITE SAME at LBA %jx len %u\n",
124066df9136SAlexander Motin 	       (uintmax_t)lbalen->lba, lbalen->len);
1241ee7f31c0SAlexander Motin 
1242fee04ef7SAlexander Motin 	pb = be_lun->blocksize << be_lun->pblockexp;
1243fee04ef7SAlexander Motin 	if (be_lun->pblockoff > 0)
1244fee04ef7SAlexander Motin 		pbo = pb - be_lun->blocksize * be_lun->pblockoff;
1245fee04ef7SAlexander Motin 	else
1246fee04ef7SAlexander Motin 		pbo = 0;
124766df9136SAlexander Motin 	len_left = (uint64_t)lbalen->len * be_lun->blocksize;
1248ee7f31c0SAlexander Motin 	for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) {
1249ee7f31c0SAlexander Motin 
1250ee7f31c0SAlexander Motin 		/*
1251ee7f31c0SAlexander Motin 		 * Setup the S/G entry for this chunk.
1252ee7f31c0SAlexander Motin 		 */
125308a7cce5SAlexander Motin 		seglen = MIN(CTLBLK_MAX_SEG, len_left);
125493b8c96cSAlexander Motin 		if (pb > be_lun->blocksize) {
125593b8c96cSAlexander Motin 			adj = ((lbalen->lba + lba) * be_lun->blocksize +
125693b8c96cSAlexander Motin 			    seglen - pbo) % pb;
125793b8c96cSAlexander Motin 			if (seglen > adj)
125893b8c96cSAlexander Motin 				seglen -= adj;
125993b8c96cSAlexander Motin 			else
126093b8c96cSAlexander Motin 				seglen -= seglen % be_lun->blocksize;
126193b8c96cSAlexander Motin 		} else
1262ee7f31c0SAlexander Motin 			seglen -= seglen % be_lun->blocksize;
1263ee7f31c0SAlexander Motin 		beio->sg_segs[i].len = seglen;
1264ee7f31c0SAlexander Motin 		beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK);
1265ee7f31c0SAlexander Motin 
1266ee7f31c0SAlexander Motin 		DPRINTF("segment %d addr %p len %zd\n", i,
1267ee7f31c0SAlexander Motin 			beio->sg_segs[i].addr, beio->sg_segs[i].len);
1268ee7f31c0SAlexander Motin 
1269ee7f31c0SAlexander Motin 		beio->num_segs++;
1270ee7f31c0SAlexander Motin 		len_left -= seglen;
1271ee7f31c0SAlexander Motin 
1272ee7f31c0SAlexander Motin 		buf = beio->sg_segs[i].addr;
1273ee7f31c0SAlexander Motin 		end = buf + seglen;
1274ee7f31c0SAlexander Motin 		for (; buf < end; buf += be_lun->blocksize) {
1275ee7f31c0SAlexander Motin 			memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize);
127666df9136SAlexander Motin 			if (lbalen->flags & SWS_LBDATA)
127766df9136SAlexander Motin 				scsi_ulto4b(lbalen->lba + lba, buf);
1278ee7f31c0SAlexander Motin 			lba++;
1279ee7f31c0SAlexander Motin 		}
1280ee7f31c0SAlexander Motin 	}
1281ee7f31c0SAlexander Motin 
128266df9136SAlexander Motin 	beio->io_offset = lbalen->lba * be_lun->blocksize;
1283ee7f31c0SAlexander Motin 	beio->io_len = lba * be_lun->blocksize;
1284ee7f31c0SAlexander Motin 
1285ee7f31c0SAlexander Motin 	/* We can not do all in one run. Correct and schedule rerun. */
1286ee7f31c0SAlexander Motin 	if (len_left > 0) {
128766df9136SAlexander Motin 		lbalen->lba += lba;
128866df9136SAlexander Motin 		lbalen->len -= lba;
1289ee7f31c0SAlexander Motin 		beio->beio_cont = ctl_be_block_cw_done_ws;
1290ee7f31c0SAlexander Motin 	}
1291ee7f31c0SAlexander Motin 
1292ee7f31c0SAlexander Motin 	be_lun->dispatch(be_lun, beio);
1293ee7f31c0SAlexander Motin }
1294ee7f31c0SAlexander Motin 
1295ee7f31c0SAlexander Motin static void
1296ee7f31c0SAlexander Motin ctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun,
1297ee7f31c0SAlexander Motin 			    union ctl_io *io)
1298ee7f31c0SAlexander Motin {
1299ee7f31c0SAlexander Motin 	struct ctl_be_block_io *beio;
130066df9136SAlexander Motin 	struct ctl_ptr_len_flags *ptrlen;
1301ee7f31c0SAlexander Motin 
1302ee7f31c0SAlexander Motin 	DPRINTF("entered\n");
1303ee7f31c0SAlexander Motin 
1304e86a4142SAlexander Motin 	beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
130566df9136SAlexander Motin 	ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN];
1306ee7f31c0SAlexander Motin 
13073406a2a0SAlexander Motin 	if ((ptrlen->flags & ~SU_ANCHOR) != 0 || be_lun->unmap == NULL) {
1308ee7f31c0SAlexander Motin 		ctl_free_beio(beio);
1309ee7f31c0SAlexander Motin 		ctl_set_invalid_field(&io->scsiio,
1310ee7f31c0SAlexander Motin 				      /*sks_valid*/ 0,
1311ee7f31c0SAlexander Motin 				      /*command*/ 1,
1312ee7f31c0SAlexander Motin 				      /*field*/ 0,
1313ee7f31c0SAlexander Motin 				      /*bit_valid*/ 0,
1314ee7f31c0SAlexander Motin 				      /*bit*/ 0);
1315ee7f31c0SAlexander Motin 		ctl_config_write_done(io);
1316ee7f31c0SAlexander Motin 		return;
1317ee7f31c0SAlexander Motin 	}
1318ee7f31c0SAlexander Motin 
1319ee7f31c0SAlexander Motin 	beio->io_len = 0;
1320ee7f31c0SAlexander Motin 	beio->io_offset = -1;
1321ee7f31c0SAlexander Motin 	beio->bio_cmd = BIO_DELETE;
1322ee7f31c0SAlexander Motin 	beio->ds_trans_type = DEVSTAT_FREE;
132366df9136SAlexander Motin 	DPRINTF("UNMAP\n");
1324ee7f31c0SAlexander Motin 	be_lun->unmap(be_lun, beio);
1325ee7f31c0SAlexander Motin }
1326ee7f31c0SAlexander Motin 
1327ee7f31c0SAlexander Motin static void
1328ef8daf3fSAlexander Motin ctl_be_block_cr_done(struct ctl_be_block_io *beio)
1329ef8daf3fSAlexander Motin {
1330ef8daf3fSAlexander Motin 	union ctl_io *io;
1331ef8daf3fSAlexander Motin 
1332ef8daf3fSAlexander Motin 	io = beio->io;
1333ef8daf3fSAlexander Motin 	ctl_free_beio(beio);
1334ef8daf3fSAlexander Motin 	ctl_config_read_done(io);
1335ef8daf3fSAlexander Motin }
1336ef8daf3fSAlexander Motin 
1337ef8daf3fSAlexander Motin static void
1338ef8daf3fSAlexander Motin ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun,
1339ef8daf3fSAlexander Motin 			 union ctl_io *io)
1340ef8daf3fSAlexander Motin {
1341ef8daf3fSAlexander Motin 	struct ctl_be_block_io *beio;
1342ef8daf3fSAlexander Motin 	struct ctl_be_block_softc *softc;
1343ef8daf3fSAlexander Motin 
1344ef8daf3fSAlexander Motin 	DPRINTF("entered\n");
1345ef8daf3fSAlexander Motin 
1346ef8daf3fSAlexander Motin 	softc = be_lun->softc;
1347ef8daf3fSAlexander Motin 	beio = ctl_alloc_beio(softc);
1348ef8daf3fSAlexander Motin 	beio->io = io;
1349ef8daf3fSAlexander Motin 	beio->lun = be_lun;
1350ef8daf3fSAlexander Motin 	beio->beio_cont = ctl_be_block_cr_done;
1351ef8daf3fSAlexander Motin 	PRIV(io)->ptr = (void *)beio;
1352ef8daf3fSAlexander Motin 
1353ef8daf3fSAlexander Motin 	switch (io->scsiio.cdb[0]) {
1354ef8daf3fSAlexander Motin 	case SERVICE_ACTION_IN:		/* GET LBA STATUS */
1355ef8daf3fSAlexander Motin 		beio->bio_cmd = -1;
1356ef8daf3fSAlexander Motin 		beio->ds_trans_type = DEVSTAT_NO_DATA;
1357ef8daf3fSAlexander Motin 		beio->ds_tag_type = DEVSTAT_TAG_ORDERED;
1358ef8daf3fSAlexander Motin 		beio->io_len = 0;
1359ef8daf3fSAlexander Motin 		if (be_lun->get_lba_status)
1360ef8daf3fSAlexander Motin 			be_lun->get_lba_status(be_lun, beio);
1361ef8daf3fSAlexander Motin 		else
1362ef8daf3fSAlexander Motin 			ctl_be_block_cr_done(beio);
1363ef8daf3fSAlexander Motin 		break;
1364ef8daf3fSAlexander Motin 	default:
1365ef8daf3fSAlexander Motin 		panic("Unhandled CDB type %#x", io->scsiio.cdb[0]);
1366ef8daf3fSAlexander Motin 		break;
1367ef8daf3fSAlexander Motin 	}
1368ef8daf3fSAlexander Motin }
1369ef8daf3fSAlexander Motin 
1370ef8daf3fSAlexander Motin static void
1371ee7f31c0SAlexander Motin ctl_be_block_cw_done(struct ctl_be_block_io *beio)
1372ee7f31c0SAlexander Motin {
1373ee7f31c0SAlexander Motin 	union ctl_io *io;
1374ee7f31c0SAlexander Motin 
1375ee7f31c0SAlexander Motin 	io = beio->io;
1376ee7f31c0SAlexander Motin 	ctl_free_beio(beio);
1377ee7f31c0SAlexander Motin 	ctl_config_write_done(io);
1378ee7f31c0SAlexander Motin }
1379ee7f31c0SAlexander Motin 
1380ee7f31c0SAlexander Motin static void
1381130f4520SKenneth D. Merry ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun,
1382130f4520SKenneth D. Merry 			 union ctl_io *io)
1383130f4520SKenneth D. Merry {
1384130f4520SKenneth D. Merry 	struct ctl_be_block_io *beio;
1385130f4520SKenneth D. Merry 	struct ctl_be_block_softc *softc;
1386130f4520SKenneth D. Merry 
1387130f4520SKenneth D. Merry 	DPRINTF("entered\n");
1388130f4520SKenneth D. Merry 
1389130f4520SKenneth D. Merry 	softc = be_lun->softc;
1390130f4520SKenneth D. Merry 	beio = ctl_alloc_beio(softc);
1391130f4520SKenneth D. Merry 	beio->io = io;
1392130f4520SKenneth D. Merry 	beio->lun = be_lun;
1393ee7f31c0SAlexander Motin 	beio->beio_cont = ctl_be_block_cw_done;
13947d0d4342SAlexander Motin 	switch (io->scsiio.tag_type) {
13957d0d4342SAlexander Motin 	case CTL_TAG_ORDERED:
13967d0d4342SAlexander Motin 		beio->ds_tag_type = DEVSTAT_TAG_ORDERED;
13977d0d4342SAlexander Motin 		break;
13987d0d4342SAlexander Motin 	case CTL_TAG_HEAD_OF_QUEUE:
13997d0d4342SAlexander Motin 		beio->ds_tag_type = DEVSTAT_TAG_HEAD;
14007d0d4342SAlexander Motin 		break;
14017d0d4342SAlexander Motin 	case CTL_TAG_UNTAGGED:
14027d0d4342SAlexander Motin 	case CTL_TAG_SIMPLE:
14037d0d4342SAlexander Motin 	case CTL_TAG_ACA:
14047d0d4342SAlexander Motin 	default:
14057d0d4342SAlexander Motin 		beio->ds_tag_type = DEVSTAT_TAG_SIMPLE;
14067d0d4342SAlexander Motin 		break;
14077d0d4342SAlexander Motin 	}
1408e86a4142SAlexander Motin 	PRIV(io)->ptr = (void *)beio;
1409130f4520SKenneth D. Merry 
1410130f4520SKenneth D. Merry 	switch (io->scsiio.cdb[0]) {
1411130f4520SKenneth D. Merry 	case SYNCHRONIZE_CACHE:
1412130f4520SKenneth D. Merry 	case SYNCHRONIZE_CACHE_16:
14137d0d4342SAlexander Motin 		ctl_be_block_cw_dispatch_sync(be_lun, io);
1414130f4520SKenneth D. Merry 		break;
1415ee7f31c0SAlexander Motin 	case WRITE_SAME_10:
1416ee7f31c0SAlexander Motin 	case WRITE_SAME_16:
1417ee7f31c0SAlexander Motin 		ctl_be_block_cw_dispatch_ws(be_lun, io);
1418ee7f31c0SAlexander Motin 		break;
1419ee7f31c0SAlexander Motin 	case UNMAP:
1420ee7f31c0SAlexander Motin 		ctl_be_block_cw_dispatch_unmap(be_lun, io);
1421ee7f31c0SAlexander Motin 		break;
1422130f4520SKenneth D. Merry 	default:
1423130f4520SKenneth D. Merry 		panic("Unhandled CDB type %#x", io->scsiio.cdb[0]);
1424130f4520SKenneth D. Merry 		break;
1425130f4520SKenneth D. Merry 	}
1426130f4520SKenneth D. Merry }
1427130f4520SKenneth D. Merry 
1428d9fae5abSAndriy Gapon SDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t");
1429d9fae5abSAndriy Gapon SDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t");
1430d9fae5abSAndriy Gapon SDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t");
1431d9fae5abSAndriy Gapon SDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t");
1432130f4520SKenneth D. Merry 
1433130f4520SKenneth D. Merry static void
143408a7cce5SAlexander Motin ctl_be_block_next(struct ctl_be_block_io *beio)
143508a7cce5SAlexander Motin {
143608a7cce5SAlexander Motin 	struct ctl_be_block_lun *be_lun;
143708a7cce5SAlexander Motin 	union ctl_io *io;
143808a7cce5SAlexander Motin 
143908a7cce5SAlexander Motin 	io = beio->io;
144008a7cce5SAlexander Motin 	be_lun = beio->lun;
144108a7cce5SAlexander Motin 	ctl_free_beio(beio);
1442ead2f117SAlexander Motin 	if ((io->io_hdr.flags & CTL_FLAG_ABORT) ||
1443ead2f117SAlexander Motin 	    ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE &&
1444ead2f117SAlexander Motin 	     (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) {
144511b569f7SAlexander Motin 		ctl_data_submit_done(io);
144608a7cce5SAlexander Motin 		return;
144708a7cce5SAlexander Motin 	}
144808a7cce5SAlexander Motin 
144908a7cce5SAlexander Motin 	io->io_hdr.status &= ~CTL_STATUS_MASK;
145008a7cce5SAlexander Motin 	io->io_hdr.status |= CTL_STATUS_NONE;
145108a7cce5SAlexander Motin 
145275c7a1d3SAlexander Motin 	mtx_lock(&be_lun->queue_lock);
145308a7cce5SAlexander Motin 	/*
145408a7cce5SAlexander Motin 	 * XXX KDM make sure that links is okay to use at this point.
145508a7cce5SAlexander Motin 	 * Otherwise, we either need to add another field to ctl_io_hdr,
145608a7cce5SAlexander Motin 	 * or deal with resource allocation here.
145708a7cce5SAlexander Motin 	 */
145808a7cce5SAlexander Motin 	STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links);
145975c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->queue_lock);
146008a7cce5SAlexander Motin 
146108a7cce5SAlexander Motin 	taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task);
146208a7cce5SAlexander Motin }
146308a7cce5SAlexander Motin 
146408a7cce5SAlexander Motin static void
1465130f4520SKenneth D. Merry ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun,
1466130f4520SKenneth D. Merry 			   union ctl_io *io)
1467130f4520SKenneth D. Merry {
1468130f4520SKenneth D. Merry 	struct ctl_be_block_io *beio;
1469130f4520SKenneth D. Merry 	struct ctl_be_block_softc *softc;
147011b569f7SAlexander Motin 	struct ctl_lba_len_flags *lbalen;
1471e86a4142SAlexander Motin 	struct ctl_ptr_len_flags *bptrlen;
1472e86a4142SAlexander Motin 	uint64_t len_left, lbas;
1473130f4520SKenneth D. Merry 	int i;
1474130f4520SKenneth D. Merry 
1475130f4520SKenneth D. Merry 	softc = be_lun->softc;
1476130f4520SKenneth D. Merry 
1477130f4520SKenneth D. Merry 	DPRINTF("entered\n");
1478130f4520SKenneth D. Merry 
147911b569f7SAlexander Motin 	lbalen = ARGS(io);
148011b569f7SAlexander Motin 	if (lbalen->flags & CTL_LLF_WRITE) {
1481130f4520SKenneth D. Merry 		SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0);
148211b569f7SAlexander Motin 	} else {
148311b569f7SAlexander Motin 		SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0);
1484130f4520SKenneth D. Merry 	}
1485130f4520SKenneth D. Merry 
1486130f4520SKenneth D. Merry 	beio = ctl_alloc_beio(softc);
1487130f4520SKenneth D. Merry 	beio->io = io;
1488130f4520SKenneth D. Merry 	beio->lun = be_lun;
1489e86a4142SAlexander Motin 	bptrlen = PRIV(io);
1490e86a4142SAlexander Motin 	bptrlen->ptr = (void *)beio;
1491130f4520SKenneth D. Merry 
1492130f4520SKenneth D. Merry 	switch (io->scsiio.tag_type) {
1493130f4520SKenneth D. Merry 	case CTL_TAG_ORDERED:
1494130f4520SKenneth D. Merry 		beio->ds_tag_type = DEVSTAT_TAG_ORDERED;
1495130f4520SKenneth D. Merry 		break;
1496130f4520SKenneth D. Merry 	case CTL_TAG_HEAD_OF_QUEUE:
1497130f4520SKenneth D. Merry 		beio->ds_tag_type = DEVSTAT_TAG_HEAD;
1498130f4520SKenneth D. Merry 		break;
1499130f4520SKenneth D. Merry 	case CTL_TAG_UNTAGGED:
1500130f4520SKenneth D. Merry 	case CTL_TAG_SIMPLE:
1501130f4520SKenneth D. Merry 	case CTL_TAG_ACA:
1502130f4520SKenneth D. Merry 	default:
1503130f4520SKenneth D. Merry 		beio->ds_tag_type = DEVSTAT_TAG_SIMPLE;
1504130f4520SKenneth D. Merry 		break;
1505130f4520SKenneth D. Merry 	}
1506130f4520SKenneth D. Merry 
150711b569f7SAlexander Motin 	if (lbalen->flags & CTL_LLF_WRITE) {
1508130f4520SKenneth D. Merry 		beio->bio_cmd = BIO_WRITE;
1509130f4520SKenneth D. Merry 		beio->ds_trans_type = DEVSTAT_WRITE;
151011b569f7SAlexander Motin 	} else {
151111b569f7SAlexander Motin 		beio->bio_cmd = BIO_READ;
151211b569f7SAlexander Motin 		beio->ds_trans_type = DEVSTAT_READ;
1513130f4520SKenneth D. Merry 	}
1514130f4520SKenneth D. Merry 
151508a7cce5SAlexander Motin 	DPRINTF("%s at LBA %jx len %u @%ju\n",
1516130f4520SKenneth D. Merry 	       (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE",
1517e86a4142SAlexander Motin 	       (uintmax_t)lbalen->lba, lbalen->len, bptrlen->len);
151811b569f7SAlexander Motin 	if (lbalen->flags & CTL_LLF_COMPARE)
151911b569f7SAlexander Motin 		lbas = CTLBLK_HALF_IO_SIZE;
152011b569f7SAlexander Motin 	else
152111b569f7SAlexander Motin 		lbas = CTLBLK_MAX_IO_SIZE;
152211b569f7SAlexander Motin 	lbas = MIN(lbalen->len - bptrlen->len, lbas / be_lun->blocksize);
1523e86a4142SAlexander Motin 	beio->io_offset = (lbalen->lba + bptrlen->len) * be_lun->blocksize;
1524e86a4142SAlexander Motin 	beio->io_len = lbas * be_lun->blocksize;
1525e86a4142SAlexander Motin 	bptrlen->len += lbas;
1526130f4520SKenneth D. Merry 
152708a7cce5SAlexander Motin 	for (i = 0, len_left = beio->io_len; len_left > 0; i++) {
152808a7cce5SAlexander Motin 		KASSERT(i < CTLBLK_MAX_SEGS, ("Too many segs (%d >= %d)",
152908a7cce5SAlexander Motin 		    i, CTLBLK_MAX_SEGS));
1530130f4520SKenneth D. Merry 
1531130f4520SKenneth D. Merry 		/*
1532130f4520SKenneth D. Merry 		 * Setup the S/G entry for this chunk.
1533130f4520SKenneth D. Merry 		 */
153408a7cce5SAlexander Motin 		beio->sg_segs[i].len = min(CTLBLK_MAX_SEG, len_left);
1535130f4520SKenneth D. Merry 		beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK);
1536130f4520SKenneth D. Merry 
1537130f4520SKenneth D. Merry 		DPRINTF("segment %d addr %p len %zd\n", i,
1538130f4520SKenneth D. Merry 			beio->sg_segs[i].addr, beio->sg_segs[i].len);
1539130f4520SKenneth D. Merry 
154011b569f7SAlexander Motin 		/* Set up second segment for compare operation. */
154111b569f7SAlexander Motin 		if (lbalen->flags & CTL_LLF_COMPARE) {
154211b569f7SAlexander Motin 			beio->sg_segs[i + CTLBLK_HALF_SEGS].len =
154311b569f7SAlexander Motin 			    beio->sg_segs[i].len;
154411b569f7SAlexander Motin 			beio->sg_segs[i + CTLBLK_HALF_SEGS].addr =
154511b569f7SAlexander Motin 			    uma_zalloc(be_lun->lun_zone, M_WAITOK);
154611b569f7SAlexander Motin 		}
154711b569f7SAlexander Motin 
1548130f4520SKenneth D. Merry 		beio->num_segs++;
1549130f4520SKenneth D. Merry 		len_left -= beio->sg_segs[i].len;
1550130f4520SKenneth D. Merry 	}
1551e86a4142SAlexander Motin 	if (bptrlen->len < lbalen->len)
155208a7cce5SAlexander Motin 		beio->beio_cont = ctl_be_block_next;
155308a7cce5SAlexander Motin 	io->scsiio.be_move_done = ctl_be_block_move_done;
155411b569f7SAlexander Motin 	/* For compare we have separate S/G lists for read and datamove. */
155511b569f7SAlexander Motin 	if (lbalen->flags & CTL_LLF_COMPARE)
155611b569f7SAlexander Motin 		io->scsiio.kern_data_ptr = (uint8_t *)&beio->sg_segs[CTLBLK_HALF_SEGS];
155711b569f7SAlexander Motin 	else
155808a7cce5SAlexander Motin 		io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs;
155908a7cce5SAlexander Motin 	io->scsiio.kern_data_len = beio->io_len;
156008a7cce5SAlexander Motin 	io->scsiio.kern_data_resid = 0;
156108a7cce5SAlexander Motin 	io->scsiio.kern_sg_entries = beio->num_segs;
156208a7cce5SAlexander Motin 	io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST;
1563130f4520SKenneth D. Merry 
1564130f4520SKenneth D. Merry 	/*
1565130f4520SKenneth D. Merry 	 * For the read case, we need to read the data into our buffers and
1566130f4520SKenneth D. Merry 	 * then we can send it back to the user.  For the write case, we
1567130f4520SKenneth D. Merry 	 * need to get the data from the user first.
1568130f4520SKenneth D. Merry 	 */
1569130f4520SKenneth D. Merry 	if (beio->bio_cmd == BIO_READ) {
1570130f4520SKenneth D. Merry 		SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0);
1571130f4520SKenneth D. Merry 		be_lun->dispatch(be_lun, beio);
1572130f4520SKenneth D. Merry 	} else {
1573130f4520SKenneth D. Merry 		SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0);
1574130f4520SKenneth D. Merry #ifdef CTL_TIME_IO
1575130f4520SKenneth D. Merry         	getbintime(&io->io_hdr.dma_start_bt);
1576130f4520SKenneth D. Merry #endif
1577130f4520SKenneth D. Merry 		ctl_datamove(io);
1578130f4520SKenneth D. Merry 	}
1579130f4520SKenneth D. Merry }
1580130f4520SKenneth D. Merry 
1581130f4520SKenneth D. Merry static void
1582130f4520SKenneth D. Merry ctl_be_block_worker(void *context, int pending)
1583130f4520SKenneth D. Merry {
1584130f4520SKenneth D. Merry 	struct ctl_be_block_lun *be_lun;
1585130f4520SKenneth D. Merry 	struct ctl_be_block_softc *softc;
1586130f4520SKenneth D. Merry 	union ctl_io *io;
1587130f4520SKenneth D. Merry 
1588130f4520SKenneth D. Merry 	be_lun = (struct ctl_be_block_lun *)context;
1589130f4520SKenneth D. Merry 	softc = be_lun->softc;
1590130f4520SKenneth D. Merry 
1591130f4520SKenneth D. Merry 	DPRINTF("entered\n");
1592130f4520SKenneth D. Merry 
159375c7a1d3SAlexander Motin 	mtx_lock(&be_lun->queue_lock);
1594130f4520SKenneth D. Merry 	for (;;) {
1595130f4520SKenneth D. Merry 		io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue);
1596130f4520SKenneth D. Merry 		if (io != NULL) {
1597130f4520SKenneth D. Merry 			struct ctl_be_block_io *beio;
1598130f4520SKenneth D. Merry 
1599130f4520SKenneth D. Merry 			DPRINTF("datamove queue\n");
1600130f4520SKenneth D. Merry 
1601130f4520SKenneth D. Merry 			STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr,
1602130f4520SKenneth D. Merry 				      ctl_io_hdr, links);
1603130f4520SKenneth D. Merry 
160475c7a1d3SAlexander Motin 			mtx_unlock(&be_lun->queue_lock);
1605130f4520SKenneth D. Merry 
1606e86a4142SAlexander Motin 			beio = (struct ctl_be_block_io *)PRIV(io)->ptr;
1607130f4520SKenneth D. Merry 
1608130f4520SKenneth D. Merry 			be_lun->dispatch(be_lun, beio);
1609130f4520SKenneth D. Merry 
161075c7a1d3SAlexander Motin 			mtx_lock(&be_lun->queue_lock);
1611130f4520SKenneth D. Merry 			continue;
1612130f4520SKenneth D. Merry 		}
1613130f4520SKenneth D. Merry 		io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue);
1614130f4520SKenneth D. Merry 		if (io != NULL) {
1615130f4520SKenneth D. Merry 			DPRINTF("config write queue\n");
1616130f4520SKenneth D. Merry 			STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr,
1617130f4520SKenneth D. Merry 				      ctl_io_hdr, links);
161875c7a1d3SAlexander Motin 			mtx_unlock(&be_lun->queue_lock);
1619130f4520SKenneth D. Merry 			ctl_be_block_cw_dispatch(be_lun, io);
1620ef8daf3fSAlexander Motin 			mtx_lock(&be_lun->queue_lock);
1621ef8daf3fSAlexander Motin 			continue;
1622ef8daf3fSAlexander Motin 		}
1623ef8daf3fSAlexander Motin 		io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_read_queue);
1624ef8daf3fSAlexander Motin 		if (io != NULL) {
1625ef8daf3fSAlexander Motin 			DPRINTF("config read queue\n");
1626ef8daf3fSAlexander Motin 			STAILQ_REMOVE(&be_lun->config_read_queue, &io->io_hdr,
1627ef8daf3fSAlexander Motin 				      ctl_io_hdr, links);
1628ef8daf3fSAlexander Motin 			mtx_unlock(&be_lun->queue_lock);
1629ef8daf3fSAlexander Motin 			ctl_be_block_cr_dispatch(be_lun, io);
163075c7a1d3SAlexander Motin 			mtx_lock(&be_lun->queue_lock);
1631130f4520SKenneth D. Merry 			continue;
1632130f4520SKenneth D. Merry 		}
1633130f4520SKenneth D. Merry 		io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue);
1634130f4520SKenneth D. Merry 		if (io != NULL) {
1635130f4520SKenneth D. Merry 			DPRINTF("input queue\n");
1636130f4520SKenneth D. Merry 
1637130f4520SKenneth D. Merry 			STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr,
1638130f4520SKenneth D. Merry 				      ctl_io_hdr, links);
163975c7a1d3SAlexander Motin 			mtx_unlock(&be_lun->queue_lock);
1640130f4520SKenneth D. Merry 
1641130f4520SKenneth D. Merry 			/*
1642130f4520SKenneth D. Merry 			 * We must drop the lock, since this routine and
1643130f4520SKenneth D. Merry 			 * its children may sleep.
1644130f4520SKenneth D. Merry 			 */
1645130f4520SKenneth D. Merry 			ctl_be_block_dispatch(be_lun, io);
1646130f4520SKenneth D. Merry 
164775c7a1d3SAlexander Motin 			mtx_lock(&be_lun->queue_lock);
1648130f4520SKenneth D. Merry 			continue;
1649130f4520SKenneth D. Merry 		}
1650130f4520SKenneth D. Merry 
1651130f4520SKenneth D. Merry 		/*
1652130f4520SKenneth D. Merry 		 * If we get here, there is no work left in the queues, so
1653130f4520SKenneth D. Merry 		 * just break out and let the task queue go to sleep.
1654130f4520SKenneth D. Merry 		 */
1655130f4520SKenneth D. Merry 		break;
1656130f4520SKenneth D. Merry 	}
165775c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->queue_lock);
1658130f4520SKenneth D. Merry }
1659130f4520SKenneth D. Merry 
1660130f4520SKenneth D. Merry /*
1661130f4520SKenneth D. Merry  * Entry point from CTL to the backend for I/O.  We queue everything to a
1662130f4520SKenneth D. Merry  * work thread, so this just puts the I/O on a queue and wakes up the
1663130f4520SKenneth D. Merry  * thread.
1664130f4520SKenneth D. Merry  */
1665130f4520SKenneth D. Merry static int
1666130f4520SKenneth D. Merry ctl_be_block_submit(union ctl_io *io)
1667130f4520SKenneth D. Merry {
1668130f4520SKenneth D. Merry 	struct ctl_be_block_lun *be_lun;
1669130f4520SKenneth D. Merry 	struct ctl_be_lun *ctl_be_lun;
1670130f4520SKenneth D. Merry 
1671130f4520SKenneth D. Merry 	DPRINTF("entered\n");
1672130f4520SKenneth D. Merry 
1673130f4520SKenneth D. Merry 	ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[
1674130f4520SKenneth D. Merry 		CTL_PRIV_BACKEND_LUN].ptr;
1675130f4520SKenneth D. Merry 	be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun;
1676130f4520SKenneth D. Merry 
1677130f4520SKenneth D. Merry 	/*
1678130f4520SKenneth D. Merry 	 * Make sure we only get SCSI I/O.
1679130f4520SKenneth D. Merry 	 */
1680130f4520SKenneth D. Merry 	KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type "
1681130f4520SKenneth D. Merry 		"%#x) encountered", io->io_hdr.io_type));
1682130f4520SKenneth D. Merry 
1683e86a4142SAlexander Motin 	PRIV(io)->len = 0;
1684e86a4142SAlexander Motin 
168575c7a1d3SAlexander Motin 	mtx_lock(&be_lun->queue_lock);
1686130f4520SKenneth D. Merry 	/*
1687130f4520SKenneth D. Merry 	 * XXX KDM make sure that links is okay to use at this point.
1688130f4520SKenneth D. Merry 	 * Otherwise, we either need to add another field to ctl_io_hdr,
1689130f4520SKenneth D. Merry 	 * or deal with resource allocation here.
1690130f4520SKenneth D. Merry 	 */
1691130f4520SKenneth D. Merry 	STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links);
169275c7a1d3SAlexander Motin 	mtx_unlock(&be_lun->queue_lock);
1693130f4520SKenneth D. Merry 	taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task);
1694130f4520SKenneth D. Merry 
16959c71cd5aSAlexander Motin 	return (CTL_RETVAL_COMPLETE);
1696130f4520SKenneth D. Merry }
1697130f4520SKenneth D. Merry 
1698130f4520SKenneth D. Merry static int
1699130f4520SKenneth D. Merry ctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr,
1700130f4520SKenneth D. Merry 			int flag, struct thread *td)
1701130f4520SKenneth D. Merry {
1702130f4520SKenneth D. Merry 	struct ctl_be_block_softc *softc;
1703130f4520SKenneth D. Merry 	int error;
1704130f4520SKenneth D. Merry 
1705130f4520SKenneth D. Merry 	softc = &backend_block_softc;
1706130f4520SKenneth D. Merry 
1707130f4520SKenneth D. Merry 	error = 0;
1708130f4520SKenneth D. Merry 
1709130f4520SKenneth D. Merry 	switch (cmd) {
1710130f4520SKenneth D. Merry 	case CTL_LUN_REQ: {
1711130f4520SKenneth D. Merry 		struct ctl_lun_req *lun_req;
1712130f4520SKenneth D. Merry 
1713130f4520SKenneth D. Merry 		lun_req = (struct ctl_lun_req *)addr;
1714130f4520SKenneth D. Merry 
1715130f4520SKenneth D. Merry 		switch (lun_req->reqtype) {
1716130f4520SKenneth D. Merry 		case CTL_LUNREQ_CREATE:
1717130f4520SKenneth D. Merry 			error = ctl_be_block_create(softc, lun_req);
1718130f4520SKenneth D. Merry 			break;
1719130f4520SKenneth D. Merry 		case CTL_LUNREQ_RM:
1720130f4520SKenneth D. Merry 			error = ctl_be_block_rm(softc, lun_req);
1721130f4520SKenneth D. Merry 			break;
172281177295SEdward Tomasz Napierala 		case CTL_LUNREQ_MODIFY:
172381177295SEdward Tomasz Napierala 			error = ctl_be_block_modify(softc, lun_req);
172481177295SEdward Tomasz Napierala 			break;
1725130f4520SKenneth D. Merry 		default:
1726130f4520SKenneth D. Merry 			lun_req->status = CTL_LUN_ERROR;
1727130f4520SKenneth D. Merry 			snprintf(lun_req->error_str, sizeof(lun_req->error_str),
172819720f41SAlexander Motin 				 "invalid LUN request type %d",
1729130f4520SKenneth D. Merry 				 lun_req->reqtype);
1730130f4520SKenneth D. Merry 			break;
1731130f4520SKenneth D. Merry 		}
1732130f4520SKenneth D. Merry 		break;
1733130f4520SKenneth D. Merry 	}
1734130f4520SKenneth D. Merry 	default:
1735130f4520SKenneth D. Merry 		error = ENOTTY;
1736130f4520SKenneth D. Merry 		break;
1737130f4520SKenneth D. Merry 	}
1738130f4520SKenneth D. Merry 
1739130f4520SKenneth D. Merry 	return (error);
1740130f4520SKenneth D. Merry }
1741130f4520SKenneth D. Merry 
1742130f4520SKenneth D. Merry static int
1743130f4520SKenneth D. Merry ctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req)
1744130f4520SKenneth D. Merry {
1745130f4520SKenneth D. Merry 	struct ctl_be_block_filedata *file_data;
1746130f4520SKenneth D. Merry 	struct ctl_lun_create_params *params;
174734961f40SAlexander Motin 	char			     *value;
1748130f4520SKenneth D. Merry 	struct vattr		      vattr;
174934961f40SAlexander Motin 	off_t			      ps, pss, po, pos, us, uss, uo, uos;
1750130f4520SKenneth D. Merry 	int			      error;
1751130f4520SKenneth D. Merry 
1752130f4520SKenneth D. Merry 	error = 0;
1753130f4520SKenneth D. Merry 	file_data = &be_lun->backend.file;
175419720f41SAlexander Motin 	params = &be_lun->params;
1755130f4520SKenneth D. Merry 
1756130f4520SKenneth D. Merry 	be_lun->dev_type = CTL_BE_BLOCK_FILE;
1757130f4520SKenneth D. Merry 	be_lun->dispatch = ctl_be_block_dispatch_file;
1758130f4520SKenneth D. Merry 	be_lun->lun_flush = ctl_be_block_flush_file;
1759ef8daf3fSAlexander Motin 	be_lun->get_lba_status = ctl_be_block_gls_file;
176053c146deSAlexander Motin 	be_lun->getattr = ctl_be_block_getattr_file;
1761130f4520SKenneth D. Merry 
1762130f4520SKenneth D. Merry 	error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred);
1763130f4520SKenneth D. Merry 	if (error != 0) {
1764130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
1765130f4520SKenneth D. Merry 			 "error calling VOP_GETATTR() for file %s",
1766130f4520SKenneth D. Merry 			 be_lun->dev_path);
1767130f4520SKenneth D. Merry 		return (error);
1768130f4520SKenneth D. Merry 	}
1769130f4520SKenneth D. Merry 
1770130f4520SKenneth D. Merry 	/*
1771130f4520SKenneth D. Merry 	 * Verify that we have the ability to upgrade to exclusive
1772130f4520SKenneth D. Merry 	 * access on this file so we can trap errors at open instead
1773130f4520SKenneth D. Merry 	 * of reporting them during first access.
1774130f4520SKenneth D. Merry 	 */
1775130f4520SKenneth D. Merry 	if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) {
1776130f4520SKenneth D. Merry 		vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY);
1777130f4520SKenneth D. Merry 		if (be_lun->vn->v_iflag & VI_DOOMED) {
1778130f4520SKenneth D. Merry 			error = EBADF;
1779130f4520SKenneth D. Merry 			snprintf(req->error_str, sizeof(req->error_str),
1780130f4520SKenneth D. Merry 				 "error locking file %s", be_lun->dev_path);
1781130f4520SKenneth D. Merry 			return (error);
1782130f4520SKenneth D. Merry 		}
1783130f4520SKenneth D. Merry 	}
1784130f4520SKenneth D. Merry 
1785130f4520SKenneth D. Merry 
1786130f4520SKenneth D. Merry 	file_data->cred = crhold(curthread->td_ucred);
178781177295SEdward Tomasz Napierala 	if (params->lun_size_bytes != 0)
178881177295SEdward Tomasz Napierala 		be_lun->size_bytes = params->lun_size_bytes;
178981177295SEdward Tomasz Napierala 	else
1790130f4520SKenneth D. Merry 		be_lun->size_bytes = vattr.va_size;
1791130f4520SKenneth D. Merry 	/*
1792130f4520SKenneth D. Merry 	 * We set the multi thread flag for file operations because all
1793130f4520SKenneth D. Merry 	 * filesystems (in theory) are capable of allowing multiple readers
1794130f4520SKenneth D. Merry 	 * of a file at once.  So we want to get the maximum possible
1795130f4520SKenneth D. Merry 	 * concurrency.
1796130f4520SKenneth D. Merry 	 */
1797130f4520SKenneth D. Merry 	be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD;
1798130f4520SKenneth D. Merry 
1799130f4520SKenneth D. Merry 	/*
180020a28d6cSAlexander Motin 	 * For files we can use any logical block size.  Prefer 512 bytes
180120a28d6cSAlexander Motin 	 * for compatibility reasons.  If file's vattr.va_blocksize
180220a28d6cSAlexander Motin 	 * (preferred I/O block size) is bigger and multiple to chosen
180320a28d6cSAlexander Motin 	 * logical block size -- report it as physical block size.
1804130f4520SKenneth D. Merry 	 */
1805130f4520SKenneth D. Merry 	if (params->blocksize_bytes != 0)
1806130f4520SKenneth D. Merry 		be_lun->blocksize = params->blocksize_bytes;
1807130f4520SKenneth D. Merry 	else
1808130f4520SKenneth D. Merry 		be_lun->blocksize = 512;
180934961f40SAlexander Motin 
181034961f40SAlexander Motin 	us = ps = vattr.va_blocksize;
181134961f40SAlexander Motin 	uo = po = 0;
181234961f40SAlexander Motin 
181334961f40SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize");
181434961f40SAlexander Motin 	if (value != NULL)
181534961f40SAlexander Motin 		ctl_expand_number(value, &ps);
181634961f40SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset");
181734961f40SAlexander Motin 	if (value != NULL)
181834961f40SAlexander Motin 		ctl_expand_number(value, &po);
181934961f40SAlexander Motin 	pss = ps / be_lun->blocksize;
182034961f40SAlexander Motin 	pos = po / be_lun->blocksize;
182134961f40SAlexander Motin 	if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) &&
182234961f40SAlexander Motin 	    ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) {
182320a28d6cSAlexander Motin 		be_lun->pblockexp = fls(pss) - 1;
182434961f40SAlexander Motin 		be_lun->pblockoff = (pss - pos) % pss;
182534961f40SAlexander Motin 	}
182634961f40SAlexander Motin 
182734961f40SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize");
182834961f40SAlexander Motin 	if (value != NULL)
182934961f40SAlexander Motin 		ctl_expand_number(value, &us);
183034961f40SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset");
183134961f40SAlexander Motin 	if (value != NULL)
183234961f40SAlexander Motin 		ctl_expand_number(value, &uo);
183334961f40SAlexander Motin 	uss = us / be_lun->blocksize;
183434961f40SAlexander Motin 	uos = uo / be_lun->blocksize;
183534961f40SAlexander Motin 	if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) &&
183634961f40SAlexander Motin 	    ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) {
183734961f40SAlexander Motin 		be_lun->ublockexp = fls(uss) - 1;
183834961f40SAlexander Motin 		be_lun->ublockoff = (uss - uos) % uss;
183920a28d6cSAlexander Motin 	}
1840130f4520SKenneth D. Merry 
1841130f4520SKenneth D. Merry 	/*
1842130f4520SKenneth D. Merry 	 * Sanity check.  The media size has to be at least one
1843130f4520SKenneth D. Merry 	 * sector long.
1844130f4520SKenneth D. Merry 	 */
1845130f4520SKenneth D. Merry 	if (be_lun->size_bytes < be_lun->blocksize) {
1846130f4520SKenneth D. Merry 		error = EINVAL;
1847130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
1848130f4520SKenneth D. Merry 			 "file %s size %ju < block size %u", be_lun->dev_path,
1849130f4520SKenneth D. Merry 			 (uintmax_t)be_lun->size_bytes, be_lun->blocksize);
1850130f4520SKenneth D. Merry 	}
1851cb8727e2SAlexander Motin 
1852cb8727e2SAlexander Motin 	be_lun->opttxferlen = CTLBLK_MAX_IO_SIZE / be_lun->blocksize;
1853130f4520SKenneth D. Merry 	return (error);
1854130f4520SKenneth D. Merry }
1855130f4520SKenneth D. Merry 
1856130f4520SKenneth D. Merry static int
1857130f4520SKenneth D. Merry ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req)
1858130f4520SKenneth D. Merry {
1859130f4520SKenneth D. Merry 	struct ctl_lun_create_params *params;
1860130f4520SKenneth D. Merry 	struct vattr		      vattr;
1861130f4520SKenneth D. Merry 	struct cdev		     *dev;
1862130f4520SKenneth D. Merry 	struct cdevsw		     *devsw;
186334961f40SAlexander Motin 	char			     *value;
1864fbc8d4ffSAlexander Motin 	int			      error, atomic, maxio, unmap;
1865*a15bbf15SAlexander Motin 	off_t			      ps, pss, po, pos, us, uss, uo, uos, tmp;
1866130f4520SKenneth D. Merry 
186719720f41SAlexander Motin 	params = &be_lun->params;
1868130f4520SKenneth D. Merry 
1869130f4520SKenneth D. Merry 	be_lun->dev_type = CTL_BE_BLOCK_DEV;
1870130f4520SKenneth D. Merry 	be_lun->backend.dev.cdev = be_lun->vn->v_rdev;
1871130f4520SKenneth D. Merry 	be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev,
1872130f4520SKenneth D. Merry 					     &be_lun->backend.dev.dev_ref);
1873130f4520SKenneth D. Merry 	if (be_lun->backend.dev.csw == NULL)
1874130f4520SKenneth D. Merry 		panic("Unable to retrieve device switch");
1875ef8daf3fSAlexander Motin 	if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) {
187667f586a8SAlexander Motin 		be_lun->dispatch = ctl_be_block_dispatch_zvol;
1877ef8daf3fSAlexander Motin 		be_lun->get_lba_status = ctl_be_block_gls_zvol;
1878cb8727e2SAlexander Motin 		atomic = maxio = CTLBLK_MAX_IO_SIZE;
1879cb8727e2SAlexander Motin 	} else {
188067f586a8SAlexander Motin 		be_lun->dispatch = ctl_be_block_dispatch_dev;
1881cb8727e2SAlexander Motin 		atomic = 0;
1882cb8727e2SAlexander Motin 		maxio = be_lun->backend.dev.cdev->si_iosize_max;
1883cb8727e2SAlexander Motin 		if (maxio <= 0)
1884cb8727e2SAlexander Motin 			maxio = DFLTPHYS;
1885cb8727e2SAlexander Motin 		if (maxio > CTLBLK_MAX_IO_SIZE)
1886cb8727e2SAlexander Motin 			maxio = CTLBLK_MAX_IO_SIZE;
1887cb8727e2SAlexander Motin 	}
188867f586a8SAlexander Motin 	be_lun->lun_flush = ctl_be_block_flush_dev;
1889c3e7ba3eSAlexander Motin 	be_lun->getattr = ctl_be_block_getattr_dev;
1890130f4520SKenneth D. Merry 
1891130f4520SKenneth D. Merry 	error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED);
1892130f4520SKenneth D. Merry 	if (error) {
1893130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
189419720f41SAlexander Motin 			 "error getting vnode attributes for device %s",
189519720f41SAlexander Motin 			 be_lun->dev_path);
1896130f4520SKenneth D. Merry 		return (error);
1897130f4520SKenneth D. Merry 	}
1898130f4520SKenneth D. Merry 
1899130f4520SKenneth D. Merry 	dev = be_lun->vn->v_rdev;
1900130f4520SKenneth D. Merry 	devsw = dev->si_devsw;
1901130f4520SKenneth D. Merry 	if (!devsw->d_ioctl) {
1902130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
190319720f41SAlexander Motin 			 "no d_ioctl for device %s!",
1904130f4520SKenneth D. Merry 			 be_lun->dev_path);
1905130f4520SKenneth D. Merry 		return (ENODEV);
1906130f4520SKenneth D. Merry 	}
1907130f4520SKenneth D. Merry 
1908*a15bbf15SAlexander Motin 	error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, (caddr_t)&tmp, FREAD,
1909130f4520SKenneth D. Merry 			       curthread);
1910130f4520SKenneth D. Merry 	if (error) {
1911130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
191219720f41SAlexander Motin 			 "error %d returned for DIOCGSECTORSIZE ioctl "
191319720f41SAlexander Motin 			 "on %s!", error, be_lun->dev_path);
1914130f4520SKenneth D. Merry 		return (error);
1915130f4520SKenneth D. Merry 	}
1916130f4520SKenneth D. Merry 
1917130f4520SKenneth D. Merry 	/*
1918130f4520SKenneth D. Merry 	 * If the user has asked for a blocksize that is greater than the
1919130f4520SKenneth D. Merry 	 * backing device's blocksize, we can do it only if the blocksize
1920130f4520SKenneth D. Merry 	 * the user is asking for is an even multiple of the underlying
1921130f4520SKenneth D. Merry 	 * device's blocksize.
1922130f4520SKenneth D. Merry 	 */
1923*a15bbf15SAlexander Motin 	if ((params->blocksize_bytes != 0) &&
1924*a15bbf15SAlexander Motin 	    (params->blocksize_bytes >= tmp)) {
1925*a15bbf15SAlexander Motin 		if (params->blocksize_bytes % tmp == 0) {
1926130f4520SKenneth D. Merry 			be_lun->blocksize = params->blocksize_bytes;
1927130f4520SKenneth D. Merry 		} else {
1928130f4520SKenneth D. Merry 			snprintf(req->error_str, sizeof(req->error_str),
192919720f41SAlexander Motin 				 "requested blocksize %u is not an even "
1930130f4520SKenneth D. Merry 				 "multiple of backing device blocksize %u",
193119720f41SAlexander Motin 				 params->blocksize_bytes,
1932130f4520SKenneth D. Merry 				 be_lun->blocksize);
1933130f4520SKenneth D. Merry 			return (EINVAL);
1934130f4520SKenneth D. Merry 
1935130f4520SKenneth D. Merry 		}
1936*a15bbf15SAlexander Motin 	} else if (params->blocksize_bytes != 0) {
1937130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
193819720f41SAlexander Motin 			 "requested blocksize %u < backing device "
193919720f41SAlexander Motin 			 "blocksize %u", params->blocksize_bytes,
1940130f4520SKenneth D. Merry 			 be_lun->blocksize);
1941130f4520SKenneth D. Merry 		return (EINVAL);
1942*a15bbf15SAlexander Motin 	} else
1943*a15bbf15SAlexander Motin 		be_lun->blocksize = tmp;
1944130f4520SKenneth D. Merry 
1945*a15bbf15SAlexander Motin 	error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, (caddr_t)&tmp, FREAD,
1946130f4520SKenneth D. Merry 			       curthread);
1947130f4520SKenneth D. Merry 	if (error) {
1948130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
194919720f41SAlexander Motin 			 "error %d returned for DIOCGMEDIASIZE "
195019720f41SAlexander Motin 			 " ioctl on %s!", error,
195181177295SEdward Tomasz Napierala 			 be_lun->dev_path);
1952130f4520SKenneth D. Merry 		return (error);
1953130f4520SKenneth D. Merry 	}
1954130f4520SKenneth D. Merry 
195581177295SEdward Tomasz Napierala 	if (params->lun_size_bytes != 0) {
1956*a15bbf15SAlexander Motin 		if (params->lun_size_bytes > tmp) {
195781177295SEdward Tomasz Napierala 			snprintf(req->error_str, sizeof(req->error_str),
195819720f41SAlexander Motin 				 "requested LUN size %ju > backing device "
195919720f41SAlexander Motin 				 "size %ju",
196081177295SEdward Tomasz Napierala 				 (uintmax_t)params->lun_size_bytes,
196181177295SEdward Tomasz Napierala 				 (uintmax_t)be_lun->size_bytes);
196281177295SEdward Tomasz Napierala 			return (EINVAL);
1963130f4520SKenneth D. Merry 		}
1964130f4520SKenneth D. Merry 
196581177295SEdward Tomasz Napierala 		be_lun->size_bytes = params->lun_size_bytes;
1966*a15bbf15SAlexander Motin 	} else
1967*a15bbf15SAlexander Motin 		be_lun->size_bytes = tmp;
196881177295SEdward Tomasz Napierala 
1969f6012722SAlexander Motin 	error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE,
1970f6012722SAlexander Motin 			       (caddr_t)&ps, FREAD, curthread);
1971f6012722SAlexander Motin 	if (error)
1972f6012722SAlexander Motin 		ps = po = 0;
1973f6012722SAlexander Motin 	else {
1974f6012722SAlexander Motin 		error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET,
1975f6012722SAlexander Motin 				       (caddr_t)&po, FREAD, curthread);
1976f6012722SAlexander Motin 		if (error)
1977f6012722SAlexander Motin 			po = 0;
1978f6012722SAlexander Motin 	}
197934961f40SAlexander Motin 	us = ps;
198034961f40SAlexander Motin 	uo = po;
198134961f40SAlexander Motin 
198234961f40SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize");
198334961f40SAlexander Motin 	if (value != NULL)
198434961f40SAlexander Motin 		ctl_expand_number(value, &ps);
198534961f40SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset");
198634961f40SAlexander Motin 	if (value != NULL)
198734961f40SAlexander Motin 		ctl_expand_number(value, &po);
1988f6012722SAlexander Motin 	pss = ps / be_lun->blocksize;
1989f6012722SAlexander Motin 	pos = po / be_lun->blocksize;
1990f6012722SAlexander Motin 	if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) &&
1991f6012722SAlexander Motin 	    ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) {
1992f6012722SAlexander Motin 		be_lun->pblockexp = fls(pss) - 1;
1993f6012722SAlexander Motin 		be_lun->pblockoff = (pss - pos) % pss;
1994f6012722SAlexander Motin 	}
1995f6012722SAlexander Motin 
199634961f40SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize");
199734961f40SAlexander Motin 	if (value != NULL)
199834961f40SAlexander Motin 		ctl_expand_number(value, &us);
199934961f40SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset");
200034961f40SAlexander Motin 	if (value != NULL)
200134961f40SAlexander Motin 		ctl_expand_number(value, &uo);
200234961f40SAlexander Motin 	uss = us / be_lun->blocksize;
200334961f40SAlexander Motin 	uos = uo / be_lun->blocksize;
200434961f40SAlexander Motin 	if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) &&
200534961f40SAlexander Motin 	    ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) {
200634961f40SAlexander Motin 		be_lun->ublockexp = fls(uss) - 1;
200734961f40SAlexander Motin 		be_lun->ublockoff = (uss - uos) % uss;
200834961f40SAlexander Motin 	}
200934961f40SAlexander Motin 
2010cb8727e2SAlexander Motin 	be_lun->atomicblock = atomic / be_lun->blocksize;
2011cb8727e2SAlexander Motin 	be_lun->opttxferlen = maxio / be_lun->blocksize;
2012fbc8d4ffSAlexander Motin 
2013fbc8d4ffSAlexander Motin 	if (be_lun->dispatch == ctl_be_block_dispatch_zvol) {
2014fbc8d4ffSAlexander Motin 		unmap = 1;
2015fbc8d4ffSAlexander Motin 	} else {
2016fbc8d4ffSAlexander Motin 		struct diocgattr_arg	arg;
2017fbc8d4ffSAlexander Motin 
2018fbc8d4ffSAlexander Motin 		strlcpy(arg.name, "GEOM::candelete", sizeof(arg.name));
2019fbc8d4ffSAlexander Motin 		arg.len = sizeof(arg.value.i);
2020fbc8d4ffSAlexander Motin 		error = devsw->d_ioctl(dev, DIOCGATTR,
2021fbc8d4ffSAlexander Motin 		    (caddr_t)&arg, FREAD, curthread);
2022fbc8d4ffSAlexander Motin 		unmap = (error == 0) ? arg.value.i : 0;
2023fbc8d4ffSAlexander Motin 	}
2024fbc8d4ffSAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "unmap");
2025fbc8d4ffSAlexander Motin 	if (value != NULL)
2026fbc8d4ffSAlexander Motin 		unmap = (strcmp(value, "on") == 0);
2027fbc8d4ffSAlexander Motin 	if (unmap)
2028fbc8d4ffSAlexander Motin 		be_lun->unmap = ctl_be_block_unmap_dev;
2029fbc8d4ffSAlexander Motin 
203081177295SEdward Tomasz Napierala 	return (0);
203181177295SEdward Tomasz Napierala }
2032130f4520SKenneth D. Merry 
2033130f4520SKenneth D. Merry static int
2034130f4520SKenneth D. Merry ctl_be_block_close(struct ctl_be_block_lun *be_lun)
2035130f4520SKenneth D. Merry {
2036130f4520SKenneth D. Merry 	DROP_GIANT();
2037130f4520SKenneth D. Merry 	if (be_lun->vn) {
2038130f4520SKenneth D. Merry 		int flags = FREAD | FWRITE;
2039130f4520SKenneth D. Merry 
2040130f4520SKenneth D. Merry 		switch (be_lun->dev_type) {
2041130f4520SKenneth D. Merry 		case CTL_BE_BLOCK_DEV:
2042130f4520SKenneth D. Merry 			if (be_lun->backend.dev.csw) {
2043130f4520SKenneth D. Merry 				dev_relthread(be_lun->backend.dev.cdev,
2044130f4520SKenneth D. Merry 					      be_lun->backend.dev.dev_ref);
2045130f4520SKenneth D. Merry 				be_lun->backend.dev.csw  = NULL;
2046130f4520SKenneth D. Merry 				be_lun->backend.dev.cdev = NULL;
2047130f4520SKenneth D. Merry 			}
2048130f4520SKenneth D. Merry 			break;
2049130f4520SKenneth D. Merry 		case CTL_BE_BLOCK_FILE:
2050130f4520SKenneth D. Merry 			break;
2051130f4520SKenneth D. Merry 		case CTL_BE_BLOCK_NONE:
2052025a2301SEdward Tomasz Napierala 			break;
2053130f4520SKenneth D. Merry 		default:
2054130f4520SKenneth D. Merry 			panic("Unexpected backend type.");
2055130f4520SKenneth D. Merry 			break;
2056130f4520SKenneth D. Merry 		}
2057130f4520SKenneth D. Merry 
2058130f4520SKenneth D. Merry 		(void)vn_close(be_lun->vn, flags, NOCRED, curthread);
2059130f4520SKenneth D. Merry 		be_lun->vn = NULL;
2060130f4520SKenneth D. Merry 
2061130f4520SKenneth D. Merry 		switch (be_lun->dev_type) {
2062130f4520SKenneth D. Merry 		case CTL_BE_BLOCK_DEV:
2063130f4520SKenneth D. Merry 			break;
2064130f4520SKenneth D. Merry 		case CTL_BE_BLOCK_FILE:
2065130f4520SKenneth D. Merry 			if (be_lun->backend.file.cred != NULL) {
2066130f4520SKenneth D. Merry 				crfree(be_lun->backend.file.cred);
2067130f4520SKenneth D. Merry 				be_lun->backend.file.cred = NULL;
2068130f4520SKenneth D. Merry 			}
2069130f4520SKenneth D. Merry 			break;
2070130f4520SKenneth D. Merry 		case CTL_BE_BLOCK_NONE:
2071025a2301SEdward Tomasz Napierala 			break;
2072130f4520SKenneth D. Merry 		default:
2073130f4520SKenneth D. Merry 			panic("Unexpected backend type.");
2074130f4520SKenneth D. Merry 			break;
2075130f4520SKenneth D. Merry 		}
207619720f41SAlexander Motin 		be_lun->dev_type = CTL_BE_BLOCK_NONE;
2077130f4520SKenneth D. Merry 	}
2078130f4520SKenneth D. Merry 	PICKUP_GIANT();
2079130f4520SKenneth D. Merry 
2080130f4520SKenneth D. Merry 	return (0);
2081130f4520SKenneth D. Merry }
2082130f4520SKenneth D. Merry 
2083130f4520SKenneth D. Merry static int
2084130f4520SKenneth D. Merry ctl_be_block_open(struct ctl_be_block_softc *softc,
2085130f4520SKenneth D. Merry 		       struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req)
2086130f4520SKenneth D. Merry {
2087130f4520SKenneth D. Merry 	struct nameidata nd;
2088130f4520SKenneth D. Merry 	int		 flags;
2089130f4520SKenneth D. Merry 	int		 error;
2090130f4520SKenneth D. Merry 
2091130f4520SKenneth D. Merry 	/*
2092130f4520SKenneth D. Merry 	 * XXX KDM allow a read-only option?
2093130f4520SKenneth D. Merry 	 */
2094130f4520SKenneth D. Merry 	flags = FREAD | FWRITE;
2095130f4520SKenneth D. Merry 	error = 0;
2096130f4520SKenneth D. Merry 
2097130f4520SKenneth D. Merry 	if (rootvnode == NULL) {
2098130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
209919720f41SAlexander Motin 			 "Root filesystem is not mounted");
2100130f4520SKenneth D. Merry 		return (1);
2101130f4520SKenneth D. Merry 	}
2102130f4520SKenneth D. Merry 
21038a08cec1SMateusz Guzik 	pwd_ensure_dirs();
2104130f4520SKenneth D. Merry 
2105130f4520SKenneth D. Merry  again:
2106130f4520SKenneth D. Merry 	NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread);
2107130f4520SKenneth D. Merry 	error = vn_open(&nd, &flags, 0, NULL);
2108130f4520SKenneth D. Merry 	if (error) {
2109130f4520SKenneth D. Merry 		/*
2110130f4520SKenneth D. Merry 		 * This is the only reasonable guess we can make as far as
2111130f4520SKenneth D. Merry 		 * path if the user doesn't give us a fully qualified path.
2112130f4520SKenneth D. Merry 		 * If they want to specify a file, they need to specify the
2113130f4520SKenneth D. Merry 		 * full path.
2114130f4520SKenneth D. Merry 		 */
2115130f4520SKenneth D. Merry 		if (be_lun->dev_path[0] != '/') {
2116130f4520SKenneth D. Merry 			char *dev_path = "/dev/";
2117130f4520SKenneth D. Merry 			char *dev_name;
2118130f4520SKenneth D. Merry 
2119130f4520SKenneth D. Merry 			/* Try adding device path at beginning of name */
2120130f4520SKenneth D. Merry 			dev_name = malloc(strlen(be_lun->dev_path)
2121130f4520SKenneth D. Merry 					+ strlen(dev_path) + 1,
2122130f4520SKenneth D. Merry 					  M_CTLBLK, M_WAITOK);
2123130f4520SKenneth D. Merry 			if (dev_name) {
2124130f4520SKenneth D. Merry 				sprintf(dev_name, "%s%s", dev_path,
2125130f4520SKenneth D. Merry 					be_lun->dev_path);
2126130f4520SKenneth D. Merry 				free(be_lun->dev_path, M_CTLBLK);
2127130f4520SKenneth D. Merry 				be_lun->dev_path = dev_name;
2128130f4520SKenneth D. Merry 				goto again;
2129130f4520SKenneth D. Merry 			}
2130130f4520SKenneth D. Merry 		}
2131130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
213219720f41SAlexander Motin 		    "error opening %s: %d", be_lun->dev_path, error);
2133130f4520SKenneth D. Merry 		return (error);
2134130f4520SKenneth D. Merry 	}
2135130f4520SKenneth D. Merry 
2136130f4520SKenneth D. Merry 	NDFREE(&nd, NDF_ONLY_PNBUF);
2137130f4520SKenneth D. Merry 
2138130f4520SKenneth D. Merry 	be_lun->vn = nd.ni_vp;
2139130f4520SKenneth D. Merry 
2140130f4520SKenneth D. Merry 	/* We only support disks and files. */
2141130f4520SKenneth D. Merry 	if (vn_isdisk(be_lun->vn, &error)) {
2142130f4520SKenneth D. Merry 		error = ctl_be_block_open_dev(be_lun, req);
2143130f4520SKenneth D. Merry 	} else if (be_lun->vn->v_type == VREG) {
2144130f4520SKenneth D. Merry 		error = ctl_be_block_open_file(be_lun, req);
2145130f4520SKenneth D. Merry 	} else {
2146130f4520SKenneth D. Merry 		error = EINVAL;
2147130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
2148025a2301SEdward Tomasz Napierala 			 "%s is not a disk or plain file", be_lun->dev_path);
2149130f4520SKenneth D. Merry 	}
2150130f4520SKenneth D. Merry 	VOP_UNLOCK(be_lun->vn, 0);
2151130f4520SKenneth D. Merry 
2152*a15bbf15SAlexander Motin 	if (error != 0)
2153130f4520SKenneth D. Merry 		ctl_be_block_close(be_lun);
2154130f4520SKenneth D. Merry 	return (0);
2155130f4520SKenneth D. Merry }
2156130f4520SKenneth D. Merry 
2157130f4520SKenneth D. Merry static int
2158130f4520SKenneth D. Merry ctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req)
2159130f4520SKenneth D. Merry {
2160130f4520SKenneth D. Merry 	struct ctl_be_block_lun *be_lun;
2161130f4520SKenneth D. Merry 	struct ctl_lun_create_params *params;
216257a5db13SAlexander Motin 	char num_thread_str[16];
2163130f4520SKenneth D. Merry 	char tmpstr[32];
216457a5db13SAlexander Motin 	char *value;
2165fbc8d4ffSAlexander Motin 	int retval, num_threads;
216657a5db13SAlexander Motin 	int tmp_num_threads;
2167130f4520SKenneth D. Merry 
2168130f4520SKenneth D. Merry 	params = &req->reqdata.create;
2169130f4520SKenneth D. Merry 	retval = 0;
217019720f41SAlexander Motin 	req->status = CTL_LUN_OK;
2171130f4520SKenneth D. Merry 
2172130f4520SKenneth D. Merry 	num_threads = cbb_num_threads;
2173130f4520SKenneth D. Merry 
2174130f4520SKenneth D. Merry 	be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK);
2175130f4520SKenneth D. Merry 
217619720f41SAlexander Motin 	be_lun->params = req->reqdata.create;
2177130f4520SKenneth D. Merry 	be_lun->softc = softc;
2178130f4520SKenneth D. Merry 	STAILQ_INIT(&be_lun->input_queue);
2179ef8daf3fSAlexander Motin 	STAILQ_INIT(&be_lun->config_read_queue);
2180130f4520SKenneth D. Merry 	STAILQ_INIT(&be_lun->config_write_queue);
2181130f4520SKenneth D. Merry 	STAILQ_INIT(&be_lun->datamove_queue);
2182130f4520SKenneth D. Merry 	sprintf(be_lun->lunname, "cblk%d", softc->num_luns);
218375c7a1d3SAlexander Motin 	mtx_init(&be_lun->io_lock, "cblk io lock", NULL, MTX_DEF);
218475c7a1d3SAlexander Motin 	mtx_init(&be_lun->queue_lock, "cblk queue lock", NULL, MTX_DEF);
218543fb3a65SAlexander Motin 	ctl_init_opts(&be_lun->ctl_be_lun.options,
218643fb3a65SAlexander Motin 	    req->num_be_args, req->kern_be_args);
2187130f4520SKenneth D. Merry 
218808a7cce5SAlexander Motin 	be_lun->lun_zone = uma_zcreate(be_lun->lunname, CTLBLK_MAX_SEG,
2189eeb94054SAlexander Motin 	    NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0);
2190130f4520SKenneth D. Merry 
2191130f4520SKenneth D. Merry 	if (be_lun->lun_zone == NULL) {
2192130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
219319720f41SAlexander Motin 			 "error allocating UMA zone");
2194130f4520SKenneth D. Merry 		goto bailout_error;
2195130f4520SKenneth D. Merry 	}
2196130f4520SKenneth D. Merry 
2197130f4520SKenneth D. Merry 	if (params->flags & CTL_LUN_FLAG_DEV_TYPE)
2198130f4520SKenneth D. Merry 		be_lun->ctl_be_lun.lun_type = params->device_type;
2199130f4520SKenneth D. Merry 	else
2200130f4520SKenneth D. Merry 		be_lun->ctl_be_lun.lun_type = T_DIRECT;
2201130f4520SKenneth D. Merry 
2202130f4520SKenneth D. Merry 	if (be_lun->ctl_be_lun.lun_type == T_DIRECT) {
220343fb3a65SAlexander Motin 		value = ctl_get_opt(&be_lun->ctl_be_lun.options, "file");
2204eb3687a6SAlexander Motin 		if (value == NULL) {
2205130f4520SKenneth D. Merry 			snprintf(req->error_str, sizeof(req->error_str),
220619720f41SAlexander Motin 				 "no file argument specified");
2207130f4520SKenneth D. Merry 			goto bailout_error;
2208130f4520SKenneth D. Merry 		}
2209eb3687a6SAlexander Motin 		be_lun->dev_path = strdup(value, M_CTLBLK);
2210*a15bbf15SAlexander Motin 		be_lun->size_bytes = params->lun_size_bytes;
2211*a15bbf15SAlexander Motin 		if (params->blocksize_bytes != 0)
2212*a15bbf15SAlexander Motin 			be_lun->blocksize = params->blocksize_bytes;
2213*a15bbf15SAlexander Motin 		else
221419720f41SAlexander Motin 			be_lun->blocksize = 512;
2215130f4520SKenneth D. Merry 
2216130f4520SKenneth D. Merry 		retval = ctl_be_block_open(softc, be_lun, req);
2217*a15bbf15SAlexander Motin 		be_lun->size_blocks = be_lun->size_bytes / be_lun->blocksize;
2218130f4520SKenneth D. Merry 		if (retval != 0) {
2219130f4520SKenneth D. Merry 			retval = 0;
222019720f41SAlexander Motin 			req->status = CTL_LUN_WARNING;
2221130f4520SKenneth D. Merry 		}
2222130f4520SKenneth D. Merry 	} else {
2223130f4520SKenneth D. Merry 		/*
2224130f4520SKenneth D. Merry 		 * For processor devices, we don't have any size.
2225130f4520SKenneth D. Merry 		 */
2226130f4520SKenneth D. Merry 		be_lun->blocksize = 0;
2227f6012722SAlexander Motin 		be_lun->pblockexp = 0;
2228f6012722SAlexander Motin 		be_lun->pblockoff = 0;
222934961f40SAlexander Motin 		be_lun->ublockexp = 0;
223034961f40SAlexander Motin 		be_lun->ublockoff = 0;
2231130f4520SKenneth D. Merry 		be_lun->size_blocks = 0;
2232130f4520SKenneth D. Merry 		be_lun->size_bytes = 0;
2233130f4520SKenneth D. Merry 		be_lun->ctl_be_lun.maxlba = 0;
2234130f4520SKenneth D. Merry 
2235130f4520SKenneth D. Merry 		/*
2236130f4520SKenneth D. Merry 		 * Default to just 1 thread for processor devices.
2237130f4520SKenneth D. Merry 		 */
2238130f4520SKenneth D. Merry 		num_threads = 1;
2239130f4520SKenneth D. Merry 	}
2240130f4520SKenneth D. Merry 
2241130f4520SKenneth D. Merry 	/*
2242130f4520SKenneth D. Merry 	 * XXX This searching loop might be refactored to be combined with
2243130f4520SKenneth D. Merry 	 * the loop above,
2244130f4520SKenneth D. Merry 	 */
224543fb3a65SAlexander Motin 	value = ctl_get_opt(&be_lun->ctl_be_lun.options, "num_threads");
224657a5db13SAlexander Motin 	if (value != NULL) {
224757a5db13SAlexander Motin 		tmp_num_threads = strtol(value, NULL, 0);
2248130f4520SKenneth D. Merry 
2249130f4520SKenneth D. Merry 		/*
2250130f4520SKenneth D. Merry 		 * We don't let the user specify less than one
2251130f4520SKenneth D. Merry 		 * thread, but hope he's clueful enough not to
2252130f4520SKenneth D. Merry 		 * specify 1000 threads.
2253130f4520SKenneth D. Merry 		 */
2254130f4520SKenneth D. Merry 		if (tmp_num_threads < 1) {
2255130f4520SKenneth D. Merry 			snprintf(req->error_str, sizeof(req->error_str),
225619720f41SAlexander Motin 				 "invalid number of threads %s",
225719720f41SAlexander Motin 				 num_thread_str);
2258130f4520SKenneth D. Merry 			goto bailout_error;
2259130f4520SKenneth D. Merry 		}
2260130f4520SKenneth D. Merry 		num_threads = tmp_num_threads;
226157a5db13SAlexander Motin 	}
2262130f4520SKenneth D. Merry 
2263130f4520SKenneth D. Merry 	be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED;
2264130f4520SKenneth D. Merry 	be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY;
226519720f41SAlexander Motin 	if (be_lun->vn == NULL)
226619720f41SAlexander Motin 		be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_OFFLINE;
2267fbc8d4ffSAlexander Motin 	if (be_lun->unmap != NULL)
2268ee7f31c0SAlexander Motin 		be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP;
2269bfbfc4a3SAlexander Motin 	if (be_lun->dispatch != ctl_be_block_dispatch_dev)
2270bfbfc4a3SAlexander Motin 		be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_SERSEQ_READ;
2271130f4520SKenneth D. Merry 	be_lun->ctl_be_lun.be_lun = be_lun;
227219720f41SAlexander Motin 	be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ?
227319720f41SAlexander Motin 	    0 : (be_lun->size_blocks - 1);
2274130f4520SKenneth D. Merry 	be_lun->ctl_be_lun.blocksize = be_lun->blocksize;
2275f6012722SAlexander Motin 	be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp;
2276f6012722SAlexander Motin 	be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff;
227734961f40SAlexander Motin 	be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp;
227834961f40SAlexander Motin 	be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff;
2279cb8727e2SAlexander Motin 	be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock;
2280cb8727e2SAlexander Motin 	be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen;
2281130f4520SKenneth D. Merry 	/* Tell the user the blocksize we ended up using */
228219720f41SAlexander Motin 	params->lun_size_bytes = be_lun->size_bytes;
2283130f4520SKenneth D. Merry 	params->blocksize_bytes = be_lun->blocksize;
2284130f4520SKenneth D. Merry 	if (params->flags & CTL_LUN_FLAG_ID_REQ) {
2285130f4520SKenneth D. Merry 		be_lun->ctl_be_lun.req_lun_id = params->req_lun_id;
2286130f4520SKenneth D. Merry 		be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ;
2287130f4520SKenneth D. Merry 	} else
2288130f4520SKenneth D. Merry 		be_lun->ctl_be_lun.req_lun_id = 0;
2289130f4520SKenneth D. Merry 
2290130f4520SKenneth D. Merry 	be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown;
2291130f4520SKenneth D. Merry 	be_lun->ctl_be_lun.lun_config_status =
2292130f4520SKenneth D. Merry 		ctl_be_block_lun_config_status;
2293130f4520SKenneth D. Merry 	be_lun->ctl_be_lun.be = &ctl_be_block_driver;
2294130f4520SKenneth D. Merry 
2295130f4520SKenneth D. Merry 	if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) {
2296130f4520SKenneth D. Merry 		snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d",
2297130f4520SKenneth D. Merry 			 softc->num_luns);
2298130f4520SKenneth D. Merry 		strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr,
2299e7038eb7SAlexander Motin 			MIN(sizeof(be_lun->ctl_be_lun.serial_num),
2300130f4520SKenneth D. Merry 			sizeof(tmpstr)));
2301130f4520SKenneth D. Merry 
2302130f4520SKenneth D. Merry 		/* Tell the user what we used for a serial number */
2303130f4520SKenneth D. Merry 		strncpy((char *)params->serial_num, tmpstr,
2304e7038eb7SAlexander Motin 			MIN(sizeof(params->serial_num), sizeof(tmpstr)));
2305130f4520SKenneth D. Merry 	} else {
2306130f4520SKenneth D. Merry 		strncpy((char *)be_lun->ctl_be_lun.serial_num,
2307130f4520SKenneth D. Merry 			params->serial_num,
2308e7038eb7SAlexander Motin 			MIN(sizeof(be_lun->ctl_be_lun.serial_num),
2309130f4520SKenneth D. Merry 			sizeof(params->serial_num)));
2310130f4520SKenneth D. Merry 	}
2311130f4520SKenneth D. Merry 	if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) {
2312130f4520SKenneth D. Merry 		snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns);
2313130f4520SKenneth D. Merry 		strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr,
2314e7038eb7SAlexander Motin 			MIN(sizeof(be_lun->ctl_be_lun.device_id),
2315130f4520SKenneth D. Merry 			sizeof(tmpstr)));
2316130f4520SKenneth D. Merry 
2317130f4520SKenneth D. Merry 		/* Tell the user what we used for a device ID */
2318130f4520SKenneth D. Merry 		strncpy((char *)params->device_id, tmpstr,
2319e7038eb7SAlexander Motin 			MIN(sizeof(params->device_id), sizeof(tmpstr)));
2320130f4520SKenneth D. Merry 	} else {
2321130f4520SKenneth D. Merry 		strncpy((char *)be_lun->ctl_be_lun.device_id,
2322130f4520SKenneth D. Merry 			params->device_id,
2323e7038eb7SAlexander Motin 			MIN(sizeof(be_lun->ctl_be_lun.device_id),
2324130f4520SKenneth D. Merry 			    sizeof(params->device_id)));
2325130f4520SKenneth D. Merry 	}
2326130f4520SKenneth D. Merry 
2327130f4520SKenneth D. Merry 	TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun);
2328130f4520SKenneth D. Merry 
2329130f4520SKenneth D. Merry 	be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK,
2330130f4520SKenneth D. Merry 	    taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue);
2331130f4520SKenneth D. Merry 
2332130f4520SKenneth D. Merry 	if (be_lun->io_taskqueue == NULL) {
2333130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
233419720f41SAlexander Motin 			 "unable to create taskqueue");
2335130f4520SKenneth D. Merry 		goto bailout_error;
2336130f4520SKenneth D. Merry 	}
2337130f4520SKenneth D. Merry 
2338130f4520SKenneth D. Merry 	/*
2339130f4520SKenneth D. Merry 	 * Note that we start the same number of threads by default for
2340130f4520SKenneth D. Merry 	 * both the file case and the block device case.  For the file
2341130f4520SKenneth D. Merry 	 * case, we need multiple threads to allow concurrency, because the
2342130f4520SKenneth D. Merry 	 * vnode interface is designed to be a blocking interface.  For the
2343130f4520SKenneth D. Merry 	 * block device case, ZFS zvols at least will block the caller's
2344130f4520SKenneth D. Merry 	 * context in many instances, and so we need multiple threads to
2345130f4520SKenneth D. Merry 	 * overcome that problem.  Other block devices don't need as many
2346130f4520SKenneth D. Merry 	 * threads, but they shouldn't cause too many problems.
2347130f4520SKenneth D. Merry 	 *
2348130f4520SKenneth D. Merry 	 * If the user wants to just have a single thread for a block
2349130f4520SKenneth D. Merry 	 * device, he can specify that when the LUN is created, or change
2350130f4520SKenneth D. Merry 	 * the tunable/sysctl to alter the default number of threads.
2351130f4520SKenneth D. Merry 	 */
2352130f4520SKenneth D. Merry 	retval = taskqueue_start_threads(&be_lun->io_taskqueue,
2353130f4520SKenneth D. Merry 					 /*num threads*/num_threads,
2354130f4520SKenneth D. Merry 					 /*priority*/PWAIT,
2355130f4520SKenneth D. Merry 					 /*thread name*/
2356130f4520SKenneth D. Merry 					 "%s taskq", be_lun->lunname);
2357130f4520SKenneth D. Merry 
2358130f4520SKenneth D. Merry 	if (retval != 0)
2359130f4520SKenneth D. Merry 		goto bailout_error;
2360130f4520SKenneth D. Merry 
2361130f4520SKenneth D. Merry 	be_lun->num_threads = num_threads;
2362130f4520SKenneth D. Merry 
2363130f4520SKenneth D. Merry 	mtx_lock(&softc->lock);
2364130f4520SKenneth D. Merry 	softc->num_luns++;
2365130f4520SKenneth D. Merry 	STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links);
2366130f4520SKenneth D. Merry 
2367130f4520SKenneth D. Merry 	mtx_unlock(&softc->lock);
2368130f4520SKenneth D. Merry 
2369130f4520SKenneth D. Merry 	retval = ctl_add_lun(&be_lun->ctl_be_lun);
2370130f4520SKenneth D. Merry 	if (retval != 0) {
2371130f4520SKenneth D. Merry 		mtx_lock(&softc->lock);
2372130f4520SKenneth D. Merry 		STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun,
2373130f4520SKenneth D. Merry 			      links);
2374130f4520SKenneth D. Merry 		softc->num_luns--;
2375130f4520SKenneth D. Merry 		mtx_unlock(&softc->lock);
2376130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
237719720f41SAlexander Motin 			 "ctl_add_lun() returned error %d, see dmesg for "
237819720f41SAlexander Motin 			 "details", retval);
2379130f4520SKenneth D. Merry 		retval = 0;
2380130f4520SKenneth D. Merry 		goto bailout_error;
2381130f4520SKenneth D. Merry 	}
2382130f4520SKenneth D. Merry 
2383130f4520SKenneth D. Merry 	mtx_lock(&softc->lock);
2384130f4520SKenneth D. Merry 
2385130f4520SKenneth D. Merry 	/*
2386130f4520SKenneth D. Merry 	 * Tell the config_status routine that we're waiting so it won't
2387130f4520SKenneth D. Merry 	 * clean up the LUN in the event of an error.
2388130f4520SKenneth D. Merry 	 */
2389130f4520SKenneth D. Merry 	be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING;
2390130f4520SKenneth D. Merry 
2391130f4520SKenneth D. Merry 	while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) {
2392130f4520SKenneth D. Merry 		retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0);
2393130f4520SKenneth D. Merry 		if (retval == EINTR)
2394130f4520SKenneth D. Merry 			break;
2395130f4520SKenneth D. Merry 	}
2396130f4520SKenneth D. Merry 	be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING;
2397130f4520SKenneth D. Merry 
2398130f4520SKenneth D. Merry 	if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) {
2399130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
240019720f41SAlexander Motin 			 "LUN configuration error, see dmesg for details");
2401130f4520SKenneth D. Merry 		STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun,
2402130f4520SKenneth D. Merry 			      links);
2403130f4520SKenneth D. Merry 		softc->num_luns--;
2404130f4520SKenneth D. Merry 		mtx_unlock(&softc->lock);
2405130f4520SKenneth D. Merry 		goto bailout_error;
2406130f4520SKenneth D. Merry 	} else {
2407130f4520SKenneth D. Merry 		params->req_lun_id = be_lun->ctl_be_lun.lun_id;
2408130f4520SKenneth D. Merry 	}
2409130f4520SKenneth D. Merry 
2410130f4520SKenneth D. Merry 	mtx_unlock(&softc->lock);
2411130f4520SKenneth D. Merry 
2412130f4520SKenneth D. Merry 	be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id,
2413130f4520SKenneth D. Merry 					       be_lun->blocksize,
2414130f4520SKenneth D. Merry 					       DEVSTAT_ALL_SUPPORTED,
2415130f4520SKenneth D. Merry 					       be_lun->ctl_be_lun.lun_type
2416130f4520SKenneth D. Merry 					       | DEVSTAT_TYPE_IF_OTHER,
2417130f4520SKenneth D. Merry 					       DEVSTAT_PRIORITY_OTHER);
2418130f4520SKenneth D. Merry 
2419130f4520SKenneth D. Merry 	return (retval);
2420130f4520SKenneth D. Merry 
2421130f4520SKenneth D. Merry bailout_error:
2422130f4520SKenneth D. Merry 	req->status = CTL_LUN_ERROR;
2423130f4520SKenneth D. Merry 
24249e005bbcSAlexander Motin 	if (be_lun->io_taskqueue != NULL)
24259e005bbcSAlexander Motin 		taskqueue_free(be_lun->io_taskqueue);
2426130f4520SKenneth D. Merry 	ctl_be_block_close(be_lun);
24279e005bbcSAlexander Motin 	if (be_lun->dev_path != NULL)
2428130f4520SKenneth D. Merry 		free(be_lun->dev_path, M_CTLBLK);
24299e005bbcSAlexander Motin 	if (be_lun->lun_zone != NULL)
24309e005bbcSAlexander Motin 		uma_zdestroy(be_lun->lun_zone);
243143fb3a65SAlexander Motin 	ctl_free_opts(&be_lun->ctl_be_lun.options);
243275c7a1d3SAlexander Motin 	mtx_destroy(&be_lun->queue_lock);
243375c7a1d3SAlexander Motin 	mtx_destroy(&be_lun->io_lock);
2434130f4520SKenneth D. Merry 	free(be_lun, M_CTLBLK);
2435130f4520SKenneth D. Merry 
2436130f4520SKenneth D. Merry 	return (retval);
2437130f4520SKenneth D. Merry }
2438130f4520SKenneth D. Merry 
2439130f4520SKenneth D. Merry static int
2440130f4520SKenneth D. Merry ctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req)
2441130f4520SKenneth D. Merry {
2442130f4520SKenneth D. Merry 	struct ctl_lun_rm_params *params;
2443130f4520SKenneth D. Merry 	struct ctl_be_block_lun *be_lun;
2444130f4520SKenneth D. Merry 	int retval;
2445130f4520SKenneth D. Merry 
2446130f4520SKenneth D. Merry 	params = &req->reqdata.rm;
2447130f4520SKenneth D. Merry 
2448130f4520SKenneth D. Merry 	mtx_lock(&softc->lock);
2449130f4520SKenneth D. Merry 
2450130f4520SKenneth D. Merry 	be_lun = NULL;
2451130f4520SKenneth D. Merry 
2452130f4520SKenneth D. Merry 	STAILQ_FOREACH(be_lun, &softc->lun_list, links) {
2453130f4520SKenneth D. Merry 		if (be_lun->ctl_be_lun.lun_id == params->lun_id)
2454130f4520SKenneth D. Merry 			break;
2455130f4520SKenneth D. Merry 	}
2456130f4520SKenneth D. Merry 	mtx_unlock(&softc->lock);
2457130f4520SKenneth D. Merry 
2458130f4520SKenneth D. Merry 	if (be_lun == NULL) {
2459130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
246019720f41SAlexander Motin 			 "LUN %u is not managed by the block backend",
246119720f41SAlexander Motin 			 params->lun_id);
2462130f4520SKenneth D. Merry 		goto bailout_error;
2463130f4520SKenneth D. Merry 	}
2464130f4520SKenneth D. Merry 
2465130f4520SKenneth D. Merry 	retval = ctl_disable_lun(&be_lun->ctl_be_lun);
2466130f4520SKenneth D. Merry 
2467130f4520SKenneth D. Merry 	if (retval != 0) {
2468130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
246919720f41SAlexander Motin 			 "error %d returned from ctl_disable_lun() for "
247019720f41SAlexander Motin 			 "LUN %d", retval, params->lun_id);
2471130f4520SKenneth D. Merry 		goto bailout_error;
2472130f4520SKenneth D. Merry 
2473130f4520SKenneth D. Merry 	}
2474130f4520SKenneth D. Merry 
2475130f4520SKenneth D. Merry 	retval = ctl_invalidate_lun(&be_lun->ctl_be_lun);
2476130f4520SKenneth D. Merry 	if (retval != 0) {
2477130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
247819720f41SAlexander Motin 			 "error %d returned from ctl_invalidate_lun() for "
247919720f41SAlexander Motin 			 "LUN %d", retval, params->lun_id);
2480130f4520SKenneth D. Merry 		goto bailout_error;
2481130f4520SKenneth D. Merry 	}
2482130f4520SKenneth D. Merry 
2483130f4520SKenneth D. Merry 	mtx_lock(&softc->lock);
2484130f4520SKenneth D. Merry 
2485130f4520SKenneth D. Merry 	be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING;
2486130f4520SKenneth D. Merry 
2487130f4520SKenneth D. Merry 	while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) {
2488130f4520SKenneth D. Merry                 retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0);
2489130f4520SKenneth D. Merry                 if (retval == EINTR)
2490130f4520SKenneth D. Merry                         break;
2491130f4520SKenneth D. Merry         }
2492130f4520SKenneth D. Merry 
2493130f4520SKenneth D. Merry 	be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING;
2494130f4520SKenneth D. Merry 
2495130f4520SKenneth D. Merry 	if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) {
2496130f4520SKenneth D. Merry 		snprintf(req->error_str, sizeof(req->error_str),
249719720f41SAlexander Motin 			 "interrupted waiting for LUN to be freed");
2498130f4520SKenneth D. Merry 		mtx_unlock(&softc->lock);
2499130f4520SKenneth D. Merry 		goto bailout_error;
2500130f4520SKenneth D. Merry 	}
2501130f4520SKenneth D. Merry 
2502130f4520SKenneth D. Merry 	STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links);
2503130f4520SKenneth D. Merry 
2504130f4520SKenneth D. Merry 	softc->num_luns--;
2505130f4520SKenneth D. Merry 	mtx_unlock(&softc->lock);
2506130f4520SKenneth D. Merry 
2507130f4520SKenneth D. Merry 	taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task);
2508130f4520SKenneth D. Merry 
2509130f4520SKenneth D. Merry 	taskqueue_free(be_lun->io_taskqueue);
2510130f4520SKenneth D. Merry 
2511130f4520SKenneth D. Merry 	ctl_be_block_close(be_lun);
2512130f4520SKenneth D. Merry 
2513130f4520SKenneth D. Merry 	if (be_lun->disk_stats != NULL)
2514130f4520SKenneth D. Merry 		devstat_remove_entry(be_lun->disk_stats);
2515130f4520SKenneth D. Merry 
2516130f4520SKenneth D. Merry 	uma_zdestroy(be_lun->lun_zone);
2517130f4520SKenneth D. Merry 
251843fb3a65SAlexander Motin 	ctl_free_opts(&be_lun->ctl_be_lun.options);
2519130f4520SKenneth D. Merry 	free(be_lun->dev_path, M_CTLBLK);
252075c7a1d3SAlexander Motin 	mtx_destroy(&be_lun->queue_lock);
252175c7a1d3SAlexander Motin 	mtx_destroy(&be_lun->io_lock);
2522130f4520SKenneth D. Merry 	free(be_lun, M_CTLBLK);
2523130f4520SKenneth D. Merry 
2524130f4520SKenneth D. Merry 	req->status = CTL_LUN_OK;
2525130f4520SKenneth D. Merry 
2526130f4520SKenneth D. Merry 	return (0);
2527130f4520SKenneth D. Merry 
2528130f4520SKenneth D. Merry bailout_error:
2529130f4520SKenneth D. Merry 
2530130f4520SKenneth D. Merry 	req->status = CTL_LUN_ERROR;
2531130f4520SKenneth D. Merry 
2532130f4520SKenneth D. Merry 	return (0);
2533130f4520SKenneth D. Merry }
2534130f4520SKenneth D. Merry 
253581177295SEdward Tomasz Napierala static int
253681177295SEdward Tomasz Napierala ctl_be_block_modify_file(struct ctl_be_block_lun *be_lun,
253781177295SEdward Tomasz Napierala 			 struct ctl_lun_req *req)
253881177295SEdward Tomasz Napierala {
253981177295SEdward Tomasz Napierala 	struct vattr vattr;
254081177295SEdward Tomasz Napierala 	int error;
254119720f41SAlexander Motin 	struct ctl_lun_create_params *params = &be_lun->params;
254281177295SEdward Tomasz Napierala 
254381177295SEdward Tomasz Napierala 	if (params->lun_size_bytes != 0) {
254481177295SEdward Tomasz Napierala 		be_lun->size_bytes = params->lun_size_bytes;
254581177295SEdward Tomasz Napierala 	} else  {
254671d8e97eSAlexander Motin 		vn_lock(be_lun->vn, LK_SHARED | LK_RETRY);
254781177295SEdward Tomasz Napierala 		error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred);
254871d8e97eSAlexander Motin 		VOP_UNLOCK(be_lun->vn, 0);
254981177295SEdward Tomasz Napierala 		if (error != 0) {
255081177295SEdward Tomasz Napierala 			snprintf(req->error_str, sizeof(req->error_str),
255181177295SEdward Tomasz Napierala 				 "error calling VOP_GETATTR() for file %s",
255281177295SEdward Tomasz Napierala 				 be_lun->dev_path);
255381177295SEdward Tomasz Napierala 			return (error);
255481177295SEdward Tomasz Napierala 		}
255581177295SEdward Tomasz Napierala 
255681177295SEdward Tomasz Napierala 		be_lun->size_bytes = vattr.va_size;
255781177295SEdward Tomasz Napierala 	}
255881177295SEdward Tomasz Napierala 
255981177295SEdward Tomasz Napierala 	return (0);
256081177295SEdward Tomasz Napierala }
256181177295SEdward Tomasz Napierala 
256281177295SEdward Tomasz Napierala static int
256381177295SEdward Tomasz Napierala ctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun,
256481177295SEdward Tomasz Napierala 			struct ctl_lun_req *req)
256581177295SEdward Tomasz Napierala {
256671d8e97eSAlexander Motin 	struct ctl_be_block_devdata *dev_data;
256781177295SEdward Tomasz Napierala 	int error;
256819720f41SAlexander Motin 	struct ctl_lun_create_params *params = &be_lun->params;
256981177295SEdward Tomasz Napierala 	uint64_t size_bytes;
257081177295SEdward Tomasz Napierala 
257171d8e97eSAlexander Motin 	dev_data = &be_lun->backend.dev;
257271d8e97eSAlexander Motin 	if (!dev_data->csw->d_ioctl) {
257381177295SEdward Tomasz Napierala 		snprintf(req->error_str, sizeof(req->error_str),
257419720f41SAlexander Motin 			 "no d_ioctl for device %s!", be_lun->dev_path);
257581177295SEdward Tomasz Napierala 		return (ENODEV);
257681177295SEdward Tomasz Napierala 	}
257781177295SEdward Tomasz Napierala 
257871d8e97eSAlexander Motin 	error = dev_data->csw->d_ioctl(dev_data->cdev, DIOCGMEDIASIZE,
257981177295SEdward Tomasz Napierala 			       (caddr_t)&size_bytes, FREAD,
258081177295SEdward Tomasz Napierala 			       curthread);
258181177295SEdward Tomasz Napierala 	if (error) {
258281177295SEdward Tomasz Napierala 		snprintf(req->error_str, sizeof(req->error_str),
258319720f41SAlexander Motin 			 "error %d returned for DIOCGMEDIASIZE ioctl "
258419720f41SAlexander Motin 			 "on %s!", error, be_lun->dev_path);
258581177295SEdward Tomasz Napierala 		return (error);
258681177295SEdward Tomasz Napierala 	}
258781177295SEdward Tomasz Napierala 
258881177295SEdward Tomasz Napierala 	if (params->lun_size_bytes != 0) {
258981177295SEdward Tomasz Napierala 		if (params->lun_size_bytes > size_bytes) {
259081177295SEdward Tomasz Napierala 			snprintf(req->error_str, sizeof(req->error_str),
259119720f41SAlexander Motin 				 "requested LUN size %ju > backing device "
259219720f41SAlexander Motin 				 "size %ju",
259381177295SEdward Tomasz Napierala 				 (uintmax_t)params->lun_size_bytes,
259481177295SEdward Tomasz Napierala 				 (uintmax_t)size_bytes);
259581177295SEdward Tomasz Napierala 			return (EINVAL);
259681177295SEdward Tomasz Napierala 		}
259781177295SEdward Tomasz Napierala 
259881177295SEdward Tomasz Napierala 		be_lun->size_bytes = params->lun_size_bytes;
259981177295SEdward Tomasz Napierala 	} else {
260081177295SEdward Tomasz Napierala 		be_lun->size_bytes = size_bytes;
260181177295SEdward Tomasz Napierala 	}
260281177295SEdward Tomasz Napierala 
260381177295SEdward Tomasz Napierala 	return (0);
260481177295SEdward Tomasz Napierala }
260581177295SEdward Tomasz Napierala 
260681177295SEdward Tomasz Napierala static int
260781177295SEdward Tomasz Napierala ctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req)
260881177295SEdward Tomasz Napierala {
260981177295SEdward Tomasz Napierala 	struct ctl_lun_modify_params *params;
261081177295SEdward Tomasz Napierala 	struct ctl_be_block_lun *be_lun;
261171d8e97eSAlexander Motin 	uint64_t oldsize;
26125050aa86SKonstantin Belousov 	int error;
261381177295SEdward Tomasz Napierala 
261481177295SEdward Tomasz Napierala 	params = &req->reqdata.modify;
261581177295SEdward Tomasz Napierala 
261681177295SEdward Tomasz Napierala 	mtx_lock(&softc->lock);
261781177295SEdward Tomasz Napierala 	be_lun = NULL;
261881177295SEdward Tomasz Napierala 	STAILQ_FOREACH(be_lun, &softc->lun_list, links) {
261981177295SEdward Tomasz Napierala 		if (be_lun->ctl_be_lun.lun_id == params->lun_id)
262081177295SEdward Tomasz Napierala 			break;
262181177295SEdward Tomasz Napierala 	}
262281177295SEdward Tomasz Napierala 	mtx_unlock(&softc->lock);
262381177295SEdward Tomasz Napierala 
262481177295SEdward Tomasz Napierala 	if (be_lun == NULL) {
262581177295SEdward Tomasz Napierala 		snprintf(req->error_str, sizeof(req->error_str),
262619720f41SAlexander Motin 			 "LUN %u is not managed by the block backend",
262719720f41SAlexander Motin 			 params->lun_id);
262881177295SEdward Tomasz Napierala 		goto bailout_error;
262981177295SEdward Tomasz Napierala 	}
263081177295SEdward Tomasz Napierala 
263119720f41SAlexander Motin 	be_lun->params.lun_size_bytes = params->lun_size_bytes;
263281177295SEdward Tomasz Napierala 
26333f829b0cSAlexander Motin 	oldsize = be_lun->size_bytes;
263419720f41SAlexander Motin 	if (be_lun->vn == NULL)
263519720f41SAlexander Motin 		error = ctl_be_block_open(softc, be_lun, req);
2636b9b4269cSAlexander Motin 	else if (vn_isdisk(be_lun->vn, &error))
2637b9b4269cSAlexander Motin 		error = ctl_be_block_modify_dev(be_lun, req);
263819720f41SAlexander Motin 	else if (be_lun->vn->v_type == VREG)
263981177295SEdward Tomasz Napierala 		error = ctl_be_block_modify_file(be_lun, req);
264081177295SEdward Tomasz Napierala 	else
2641b9b4269cSAlexander Motin 		error = EINVAL;
2642*a15bbf15SAlexander Motin 	be_lun->size_blocks = be_lun->size_bytes / be_lun->blocksize;
264381177295SEdward Tomasz Napierala 
26443f829b0cSAlexander Motin 	if (error == 0 && be_lun->size_bytes != oldsize) {
264581177295SEdward Tomasz Napierala 
264681177295SEdward Tomasz Napierala 		/*
264781177295SEdward Tomasz Napierala 		 * The maximum LBA is the size - 1.
264881177295SEdward Tomasz Napierala 		 *
264981177295SEdward Tomasz Napierala 		 * XXX: Note that this field is being updated without locking,
265081177295SEdward Tomasz Napierala 		 * 	which might cause problems on 32-bit architectures.
265181177295SEdward Tomasz Napierala 		 */
2652fbc8d4ffSAlexander Motin 		if (be_lun->unmap != NULL)
2653fbc8d4ffSAlexander Motin 			be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP;
265419720f41SAlexander Motin 		be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ?
265519720f41SAlexander Motin 		    0 : (be_lun->size_blocks - 1);
265619720f41SAlexander Motin 		be_lun->ctl_be_lun.blocksize = be_lun->blocksize;
265719720f41SAlexander Motin 		be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp;
265819720f41SAlexander Motin 		be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff;
265934961f40SAlexander Motin 		be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp;
266034961f40SAlexander Motin 		be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff;
2661cb8727e2SAlexander Motin 		be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock;
2662cb8727e2SAlexander Motin 		be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen;
266381177295SEdward Tomasz Napierala 		ctl_lun_capacity_changed(&be_lun->ctl_be_lun);
266419720f41SAlexander Motin 		if (oldsize == 0 && be_lun->size_blocks != 0)
266519720f41SAlexander Motin 			ctl_lun_online(&be_lun->ctl_be_lun);
266671d8e97eSAlexander Motin 	}
266781177295SEdward Tomasz Napierala 
266881177295SEdward Tomasz Napierala 	/* Tell the user the exact size we ended up using */
266981177295SEdward Tomasz Napierala 	params->lun_size_bytes = be_lun->size_bytes;
267081177295SEdward Tomasz Napierala 
267119720f41SAlexander Motin 	req->status = error ? CTL_LUN_WARNING : CTL_LUN_OK;
267281177295SEdward Tomasz Napierala 
267381177295SEdward Tomasz Napierala 	return (0);
267481177295SEdward Tomasz Napierala 
267581177295SEdward Tomasz Napierala bailout_error:
267681177295SEdward Tomasz Napierala 	req->status = CTL_LUN_ERROR;
267781177295SEdward Tomasz Napierala 
267881177295SEdward Tomasz Napierala 	return (0);
267981177295SEdward Tomasz Napierala }
268081177295SEdward Tomasz Napierala 
2681130f4520SKenneth D. Merry static void
2682130f4520SKenneth D. Merry ctl_be_block_lun_shutdown(void *be_lun)
2683130f4520SKenneth D. Merry {
2684130f4520SKenneth D. Merry 	struct ctl_be_block_lun *lun;
2685130f4520SKenneth D. Merry 	struct ctl_be_block_softc *softc;
2686130f4520SKenneth D. Merry 
2687130f4520SKenneth D. Merry 	lun = (struct ctl_be_block_lun *)be_lun;
2688130f4520SKenneth D. Merry 
2689130f4520SKenneth D. Merry 	softc = lun->softc;
2690130f4520SKenneth D. Merry 
2691130f4520SKenneth D. Merry 	mtx_lock(&softc->lock);
2692130f4520SKenneth D. Merry 	lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED;
2693130f4520SKenneth D. Merry 	if (lun->flags & CTL_BE_BLOCK_LUN_WAITING)
2694130f4520SKenneth D. Merry 		wakeup(lun);
2695130f4520SKenneth D. Merry 	mtx_unlock(&softc->lock);
2696130f4520SKenneth D. Merry 
2697130f4520SKenneth D. Merry }
2698130f4520SKenneth D. Merry 
2699130f4520SKenneth D. Merry static void
2700130f4520SKenneth D. Merry ctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status)
2701130f4520SKenneth D. Merry {
2702130f4520SKenneth D. Merry 	struct ctl_be_block_lun *lun;
2703130f4520SKenneth D. Merry 	struct ctl_be_block_softc *softc;
2704130f4520SKenneth D. Merry 
2705130f4520SKenneth D. Merry 	lun = (struct ctl_be_block_lun *)be_lun;
2706130f4520SKenneth D. Merry 	softc = lun->softc;
2707130f4520SKenneth D. Merry 
2708130f4520SKenneth D. Merry 	if (status == CTL_LUN_CONFIG_OK) {
2709130f4520SKenneth D. Merry 		mtx_lock(&softc->lock);
2710130f4520SKenneth D. Merry 		lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED;
2711130f4520SKenneth D. Merry 		if (lun->flags & CTL_BE_BLOCK_LUN_WAITING)
2712130f4520SKenneth D. Merry 			wakeup(lun);
2713130f4520SKenneth D. Merry 		mtx_unlock(&softc->lock);
2714130f4520SKenneth D. Merry 
2715130f4520SKenneth D. Merry 		/*
2716130f4520SKenneth D. Merry 		 * We successfully added the LUN, attempt to enable it.
2717130f4520SKenneth D. Merry 		 */
2718130f4520SKenneth D. Merry 		if (ctl_enable_lun(&lun->ctl_be_lun) != 0) {
2719130f4520SKenneth D. Merry 			printf("%s: ctl_enable_lun() failed!\n", __func__);
2720130f4520SKenneth D. Merry 			if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) {
2721130f4520SKenneth D. Merry 				printf("%s: ctl_invalidate_lun() failed!\n",
2722130f4520SKenneth D. Merry 				       __func__);
2723130f4520SKenneth D. Merry 			}
2724130f4520SKenneth D. Merry 		}
2725130f4520SKenneth D. Merry 
2726130f4520SKenneth D. Merry 		return;
2727130f4520SKenneth D. Merry 	}
2728130f4520SKenneth D. Merry 
2729130f4520SKenneth D. Merry 
2730130f4520SKenneth D. Merry 	mtx_lock(&softc->lock);
2731130f4520SKenneth D. Merry 	lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED;
2732130f4520SKenneth D. Merry 	lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR;
2733130f4520SKenneth D. Merry 	wakeup(lun);
2734130f4520SKenneth D. Merry 	mtx_unlock(&softc->lock);
2735130f4520SKenneth D. Merry }
2736130f4520SKenneth D. Merry 
2737130f4520SKenneth D. Merry 
2738130f4520SKenneth D. Merry static int
2739130f4520SKenneth D. Merry ctl_be_block_config_write(union ctl_io *io)
2740130f4520SKenneth D. Merry {
2741130f4520SKenneth D. Merry 	struct ctl_be_block_lun *be_lun;
2742130f4520SKenneth D. Merry 	struct ctl_be_lun *ctl_be_lun;
2743130f4520SKenneth D. Merry 	int retval;
2744130f4520SKenneth D. Merry 
2745130f4520SKenneth D. Merry 	retval = 0;
2746130f4520SKenneth D. Merry 
2747130f4520SKenneth D. Merry 	DPRINTF("entered\n");
2748130f4520SKenneth D. Merry 
2749130f4520SKenneth D. Merry 	ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[
2750130f4520SKenneth D. Merry 		CTL_PRIV_BACKEND_LUN].ptr;
2751130f4520SKenneth D. Merry 	be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun;
2752130f4520SKenneth D. Merry 
2753130f4520SKenneth D. Merry 	switch (io->scsiio.cdb[0]) {
2754130f4520SKenneth D. Merry 	case SYNCHRONIZE_CACHE:
2755130f4520SKenneth D. Merry 	case SYNCHRONIZE_CACHE_16:
2756ee7f31c0SAlexander Motin 	case WRITE_SAME_10:
2757ee7f31c0SAlexander Motin 	case WRITE_SAME_16:
2758ee7f31c0SAlexander Motin 	case UNMAP:
2759130f4520SKenneth D. Merry 		/*
2760130f4520SKenneth D. Merry 		 * The upper level CTL code will filter out any CDBs with
2761130f4520SKenneth D. Merry 		 * the immediate bit set and return the proper error.
2762130f4520SKenneth D. Merry 		 *
2763130f4520SKenneth D. Merry 		 * We don't really need to worry about what LBA range the
2764130f4520SKenneth D. Merry 		 * user asked to be synced out.  When they issue a sync
2765130f4520SKenneth D. Merry 		 * cache command, we'll sync out the whole thing.
2766130f4520SKenneth D. Merry 		 */
276775c7a1d3SAlexander Motin 		mtx_lock(&be_lun->queue_lock);
2768130f4520SKenneth D. Merry 		STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr,
2769130f4520SKenneth D. Merry 				   links);
277075c7a1d3SAlexander Motin 		mtx_unlock(&be_lun->queue_lock);
2771130f4520SKenneth D. Merry 		taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task);
2772130f4520SKenneth D. Merry 		break;
2773130f4520SKenneth D. Merry 	case START_STOP_UNIT: {
2774130f4520SKenneth D. Merry 		struct scsi_start_stop_unit *cdb;
2775130f4520SKenneth D. Merry 
2776130f4520SKenneth D. Merry 		cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb;
2777130f4520SKenneth D. Merry 
2778130f4520SKenneth D. Merry 		if (cdb->how & SSS_START)
2779130f4520SKenneth D. Merry 			retval = ctl_start_lun(ctl_be_lun);
2780130f4520SKenneth D. Merry 		else {
2781130f4520SKenneth D. Merry 			retval = ctl_stop_lun(ctl_be_lun);
2782130f4520SKenneth D. Merry 			/*
2783130f4520SKenneth D. Merry 			 * XXX KDM Copan-specific offline behavior.
2784130f4520SKenneth D. Merry 			 * Figure out a reasonable way to port this?
2785130f4520SKenneth D. Merry 			 */
2786130f4520SKenneth D. Merry #ifdef NEEDTOPORT
2787130f4520SKenneth D. Merry 			if ((retval == 0)
2788130f4520SKenneth D. Merry 			 && (cdb->byte2 & SSS_ONOFFLINE))
2789130f4520SKenneth D. Merry 				retval = ctl_lun_offline(ctl_be_lun);
2790130f4520SKenneth D. Merry #endif
2791130f4520SKenneth D. Merry 		}
2792130f4520SKenneth D. Merry 
2793130f4520SKenneth D. Merry 		/*
2794130f4520SKenneth D. Merry 		 * In general, the above routines should not fail.  They
2795130f4520SKenneth D. Merry 		 * just set state for the LUN.  So we've got something
2796130f4520SKenneth D. Merry 		 * pretty wrong here if we can't start or stop the LUN.
2797130f4520SKenneth D. Merry 		 */
2798130f4520SKenneth D. Merry 		if (retval != 0) {
2799130f4520SKenneth D. Merry 			ctl_set_internal_failure(&io->scsiio,
2800130f4520SKenneth D. Merry 						 /*sks_valid*/ 1,
2801130f4520SKenneth D. Merry 						 /*retry_count*/ 0xf051);
2802130f4520SKenneth D. Merry 			retval = CTL_RETVAL_COMPLETE;
2803130f4520SKenneth D. Merry 		} else {
2804130f4520SKenneth D. Merry 			ctl_set_success(&io->scsiio);
2805130f4520SKenneth D. Merry 		}
2806130f4520SKenneth D. Merry 		ctl_config_write_done(io);
2807130f4520SKenneth D. Merry 		break;
2808130f4520SKenneth D. Merry 	}
2809130f4520SKenneth D. Merry 	default:
2810130f4520SKenneth D. Merry 		ctl_set_invalid_opcode(&io->scsiio);
2811130f4520SKenneth D. Merry 		ctl_config_write_done(io);
2812130f4520SKenneth D. Merry 		retval = CTL_RETVAL_COMPLETE;
2813130f4520SKenneth D. Merry 		break;
2814130f4520SKenneth D. Merry 	}
2815130f4520SKenneth D. Merry 
2816130f4520SKenneth D. Merry 	return (retval);
2817130f4520SKenneth D. Merry }
2818130f4520SKenneth D. Merry 
2819130f4520SKenneth D. Merry static int
2820130f4520SKenneth D. Merry ctl_be_block_config_read(union ctl_io *io)
2821130f4520SKenneth D. Merry {
2822ef8daf3fSAlexander Motin 	struct ctl_be_block_lun *be_lun;
2823ef8daf3fSAlexander Motin 	struct ctl_be_lun *ctl_be_lun;
2824ef8daf3fSAlexander Motin 	int retval = 0;
2825ef8daf3fSAlexander Motin 
2826ef8daf3fSAlexander Motin 	DPRINTF("entered\n");
2827ef8daf3fSAlexander Motin 
2828ef8daf3fSAlexander Motin 	ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[
2829ef8daf3fSAlexander Motin 		CTL_PRIV_BACKEND_LUN].ptr;
2830ef8daf3fSAlexander Motin 	be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun;
2831ef8daf3fSAlexander Motin 
2832ef8daf3fSAlexander Motin 	switch (io->scsiio.cdb[0]) {
2833ef8daf3fSAlexander Motin 	case SERVICE_ACTION_IN:
2834ef8daf3fSAlexander Motin 		if (io->scsiio.cdb[1] == SGLS_SERVICE_ACTION) {
2835ef8daf3fSAlexander Motin 			mtx_lock(&be_lun->queue_lock);
2836ef8daf3fSAlexander Motin 			STAILQ_INSERT_TAIL(&be_lun->config_read_queue,
2837ef8daf3fSAlexander Motin 			    &io->io_hdr, links);
2838ef8daf3fSAlexander Motin 			mtx_unlock(&be_lun->queue_lock);
2839ef8daf3fSAlexander Motin 			taskqueue_enqueue(be_lun->io_taskqueue,
2840ef8daf3fSAlexander Motin 			    &be_lun->io_task);
2841ef8daf3fSAlexander Motin 			retval = CTL_RETVAL_QUEUED;
2842ef8daf3fSAlexander Motin 			break;
2843ef8daf3fSAlexander Motin 		}
2844ef8daf3fSAlexander Motin 		ctl_set_invalid_field(&io->scsiio,
2845ef8daf3fSAlexander Motin 				      /*sks_valid*/ 1,
2846ef8daf3fSAlexander Motin 				      /*command*/ 1,
2847ef8daf3fSAlexander Motin 				      /*field*/ 1,
2848ef8daf3fSAlexander Motin 				      /*bit_valid*/ 1,
2849ef8daf3fSAlexander Motin 				      /*bit*/ 4);
2850ef8daf3fSAlexander Motin 		ctl_config_read_done(io);
2851ef8daf3fSAlexander Motin 		retval = CTL_RETVAL_COMPLETE;
2852ef8daf3fSAlexander Motin 		break;
2853ef8daf3fSAlexander Motin 	default:
2854ef8daf3fSAlexander Motin 		ctl_set_invalid_opcode(&io->scsiio);
2855ef8daf3fSAlexander Motin 		ctl_config_read_done(io);
2856ef8daf3fSAlexander Motin 		retval = CTL_RETVAL_COMPLETE;
2857ef8daf3fSAlexander Motin 		break;
2858ef8daf3fSAlexander Motin 	}
2859ef8daf3fSAlexander Motin 
2860ef8daf3fSAlexander Motin 	return (retval);
2861130f4520SKenneth D. Merry }
2862130f4520SKenneth D. Merry 
2863130f4520SKenneth D. Merry static int
2864130f4520SKenneth D. Merry ctl_be_block_lun_info(void *be_lun, struct sbuf *sb)
2865130f4520SKenneth D. Merry {
2866130f4520SKenneth D. Merry 	struct ctl_be_block_lun *lun;
2867130f4520SKenneth D. Merry 	int retval;
2868130f4520SKenneth D. Merry 
2869130f4520SKenneth D. Merry 	lun = (struct ctl_be_block_lun *)be_lun;
2870130f4520SKenneth D. Merry 	retval = 0;
2871130f4520SKenneth D. Merry 
28722cfbcb9bSAlexander Motin 	retval = sbuf_printf(sb, "\t<num_threads>");
2873130f4520SKenneth D. Merry 
2874130f4520SKenneth D. Merry 	if (retval != 0)
2875130f4520SKenneth D. Merry 		goto bailout;
2876130f4520SKenneth D. Merry 
2877130f4520SKenneth D. Merry 	retval = sbuf_printf(sb, "%d", lun->num_threads);
2878130f4520SKenneth D. Merry 
2879130f4520SKenneth D. Merry 	if (retval != 0)
2880130f4520SKenneth D. Merry 		goto bailout;
2881130f4520SKenneth D. Merry 
28822cfbcb9bSAlexander Motin 	retval = sbuf_printf(sb, "</num_threads>\n");
2883130f4520SKenneth D. Merry 
2884130f4520SKenneth D. Merry bailout:
2885130f4520SKenneth D. Merry 
2886130f4520SKenneth D. Merry 	return (retval);
2887130f4520SKenneth D. Merry }
2888130f4520SKenneth D. Merry 
2889c3e7ba3eSAlexander Motin static uint64_t
2890c3e7ba3eSAlexander Motin ctl_be_block_lun_attr(void *be_lun, const char *attrname)
2891c3e7ba3eSAlexander Motin {
2892c3e7ba3eSAlexander Motin 	struct ctl_be_block_lun *lun = (struct ctl_be_block_lun *)be_lun;
2893c3e7ba3eSAlexander Motin 
2894c3e7ba3eSAlexander Motin 	if (lun->getattr == NULL)
2895c3e7ba3eSAlexander Motin 		return (UINT64_MAX);
2896c3e7ba3eSAlexander Motin 	return (lun->getattr(lun, attrname));
2897c3e7ba3eSAlexander Motin }
2898c3e7ba3eSAlexander Motin 
2899130f4520SKenneth D. Merry int
2900130f4520SKenneth D. Merry ctl_be_block_init(void)
2901130f4520SKenneth D. Merry {
2902130f4520SKenneth D. Merry 	struct ctl_be_block_softc *softc;
2903130f4520SKenneth D. Merry 	int retval;
2904130f4520SKenneth D. Merry 
2905130f4520SKenneth D. Merry 	softc = &backend_block_softc;
2906130f4520SKenneth D. Merry 	retval = 0;
2907130f4520SKenneth D. Merry 
290875c7a1d3SAlexander Motin 	mtx_init(&softc->lock, "ctlblock", NULL, MTX_DEF);
2909a0e36aeeSEdward Tomasz Napierala 	beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io),
2910a0e36aeeSEdward Tomasz Napierala 	    NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
2911130f4520SKenneth D. Merry 	STAILQ_INIT(&softc->disk_list);
2912130f4520SKenneth D. Merry 	STAILQ_INIT(&softc->lun_list);
2913130f4520SKenneth D. Merry 
2914130f4520SKenneth D. Merry 	return (retval);
2915130f4520SKenneth D. Merry }
2916