ctl_backend_block.c revision 275865
1229997Sken/*- 2229997Sken * Copyright (c) 2003 Silicon Graphics International Corp. 3229997Sken * Copyright (c) 2009-2011 Spectra Logic Corporation 4232604Strasz * Copyright (c) 2012 The FreeBSD Foundation 5229997Sken * All rights reserved. 6229997Sken * 7232604Strasz * Portions of this software were developed by Edward Tomasz Napierala 8232604Strasz * under sponsorship from the FreeBSD Foundation. 9232604Strasz * 10229997Sken * Redistribution and use in source and binary forms, with or without 11229997Sken * modification, are permitted provided that the following conditions 12229997Sken * are met: 13229997Sken * 1. Redistributions of source code must retain the above copyright 14229997Sken * notice, this list of conditions, and the following disclaimer, 15229997Sken * without modification. 16229997Sken * 2. Redistributions in binary form must reproduce at minimum a disclaimer 17229997Sken * substantially similar to the "NO WARRANTY" disclaimer below 18229997Sken * ("Disclaimer") and any redistribution must be conditioned upon 19229997Sken * including a substantially similar Disclaimer requirement for further 20229997Sken * binary redistribution. 21229997Sken * 22229997Sken * NO WARRANTY 23229997Sken * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24229997Sken * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25229997Sken * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 26229997Sken * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27229997Sken * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28229997Sken * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29229997Sken * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30229997Sken * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 31229997Sken * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 32229997Sken * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33229997Sken * POSSIBILITY OF SUCH DAMAGES. 34229997Sken * 35229997Sken * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend_block.c#5 $ 36229997Sken */ 37229997Sken/* 38229997Sken * CAM Target Layer driver backend for block devices. 39229997Sken * 40229997Sken * Author: Ken Merry <ken@FreeBSD.org> 41229997Sken */ 42229997Sken#include <sys/cdefs.h> 43229997Sken__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_backend_block.c 275865 2014-12-17 17:30:54Z mav $"); 44229997Sken 45229997Sken#include <sys/param.h> 46229997Sken#include <sys/systm.h> 47229997Sken#include <sys/kernel.h> 48229997Sken#include <sys/types.h> 49229997Sken#include <sys/kthread.h> 50229997Sken#include <sys/bio.h> 51229997Sken#include <sys/fcntl.h> 52264274Smav#include <sys/limits.h> 53229997Sken#include <sys/lock.h> 54229997Sken#include <sys/mutex.h> 55229997Sken#include <sys/condvar.h> 56229997Sken#include <sys/malloc.h> 57229997Sken#include <sys/conf.h> 58229997Sken#include <sys/ioccom.h> 59229997Sken#include <sys/queue.h> 60229997Sken#include <sys/sbuf.h> 61229997Sken#include <sys/endian.h> 62229997Sken#include <sys/uio.h> 63229997Sken#include <sys/buf.h> 64229997Sken#include <sys/taskqueue.h> 65229997Sken#include <sys/vnode.h> 66229997Sken#include <sys/namei.h> 67229997Sken#include <sys/mount.h> 68229997Sken#include <sys/disk.h> 69229997Sken#include <sys/fcntl.h> 70229997Sken#include <sys/filedesc.h> 71275474Smav#include <sys/filio.h> 72229997Sken#include <sys/proc.h> 73229997Sken#include <sys/pcpu.h> 74229997Sken#include <sys/module.h> 75229997Sken#include <sys/sdt.h> 76229997Sken#include <sys/devicestat.h> 77229997Sken#include <sys/sysctl.h> 78229997Sken 79229997Sken#include <geom/geom.h> 80229997Sken 81229997Sken#include <cam/cam.h> 82229997Sken#include <cam/scsi/scsi_all.h> 83229997Sken#include <cam/scsi/scsi_da.h> 84229997Sken#include <cam/ctl/ctl_io.h> 85229997Sken#include <cam/ctl/ctl.h> 86229997Sken#include <cam/ctl/ctl_backend.h> 87229997Sken#include <cam/ctl/ctl_frontend_internal.h> 88229997Sken#include <cam/ctl/ctl_ioctl.h> 89229997Sken#include <cam/ctl/ctl_scsi_all.h> 90229997Sken#include <cam/ctl/ctl_error.h> 91229997Sken 92229997Sken/* 93264886Smav * The idea here is that we'll allocate enough S/G space to hold a 1MB 94264886Smav * I/O. If we get an I/O larger than that, we'll split it. 95229997Sken */ 96267537Smav#define CTLBLK_HALF_IO_SIZE (512 * 1024) 97267537Smav#define CTLBLK_MAX_IO_SIZE (CTLBLK_HALF_IO_SIZE * 2) 98264886Smav#define CTLBLK_MAX_SEG MAXPHYS 99267537Smav#define CTLBLK_HALF_SEGS MAX(CTLBLK_HALF_IO_SIZE / CTLBLK_MAX_SEG, 1) 100267537Smav#define CTLBLK_MAX_SEGS (CTLBLK_HALF_SEGS * 2) 101229997Sken 102229997Sken#ifdef CTLBLK_DEBUG 103229997Sken#define DPRINTF(fmt, args...) \ 104229997Sken printf("cbb(%s:%d): " fmt, __FUNCTION__, __LINE__, ##args) 105229997Sken#else 106229997Sken#define DPRINTF(fmt, args...) do {} while(0) 107229997Sken#endif 108229997Sken 109267519Smav#define PRIV(io) \ 110267519Smav ((struct ctl_ptr_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_BACKEND]) 111267537Smav#define ARGS(io) \ 112267537Smav ((struct ctl_lba_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]) 113267519Smav 114229997SkenSDT_PROVIDER_DEFINE(cbb); 115229997Sken 116229997Skentypedef enum { 117229997Sken CTL_BE_BLOCK_LUN_UNCONFIGURED = 0x01, 118229997Sken CTL_BE_BLOCK_LUN_CONFIG_ERR = 0x02, 119229997Sken CTL_BE_BLOCK_LUN_WAITING = 0x04, 120229997Sken CTL_BE_BLOCK_LUN_MULTI_THREAD = 0x08 121229997Sken} ctl_be_block_lun_flags; 122229997Sken 123229997Skentypedef enum { 124229997Sken CTL_BE_BLOCK_NONE, 125229997Sken CTL_BE_BLOCK_DEV, 126229997Sken CTL_BE_BLOCK_FILE 127229997Sken} ctl_be_block_type; 128229997Sken 129229997Skenstruct ctl_be_block_devdata { 130229997Sken struct cdev *cdev; 131229997Sken struct cdevsw *csw; 132229997Sken int dev_ref; 133229997Sken}; 134229997Sken 135229997Skenstruct ctl_be_block_filedata { 136229997Sken struct ucred *cred; 137229997Sken}; 138229997Sken 139229997Skenunion ctl_be_block_bedata { 140229997Sken struct ctl_be_block_devdata dev; 141229997Sken struct ctl_be_block_filedata file; 142229997Sken}; 143229997Sken 144229997Skenstruct ctl_be_block_io; 145229997Skenstruct ctl_be_block_lun; 146229997Sken 147229997Skentypedef void (*cbb_dispatch_t)(struct ctl_be_block_lun *be_lun, 148229997Sken struct ctl_be_block_io *beio); 149274154Smavtypedef uint64_t (*cbb_getattr_t)(struct ctl_be_block_lun *be_lun, 150274154Smav const char *attrname); 151229997Sken 152229997Sken/* 153229997Sken * Backend LUN structure. There is a 1:1 mapping between a block device 154229997Sken * and a backend block LUN, and between a backend block LUN and a CTL LUN. 155229997Sken */ 156229997Skenstruct ctl_be_block_lun { 157272911Smav struct ctl_lun_create_params params; 158229997Sken struct ctl_block_disk *disk; 159229997Sken char lunname[32]; 160229997Sken char *dev_path; 161229997Sken ctl_be_block_type dev_type; 162229997Sken struct vnode *vn; 163229997Sken union ctl_be_block_bedata backend; 164229997Sken cbb_dispatch_t dispatch; 165229997Sken cbb_dispatch_t lun_flush; 166264274Smav cbb_dispatch_t unmap; 167275474Smav cbb_dispatch_t get_lba_status; 168274154Smav cbb_getattr_t getattr; 169229997Sken uma_zone_t lun_zone; 170229997Sken uint64_t size_blocks; 171229997Sken uint64_t size_bytes; 172229997Sken uint32_t blocksize; 173229997Sken int blocksize_shift; 174264191Smav uint16_t pblockexp; 175264191Smav uint16_t pblockoff; 176275865Smav uint16_t ublockexp; 177275865Smav uint16_t ublockoff; 178229997Sken struct ctl_be_block_softc *softc; 179229997Sken struct devstat *disk_stats; 180229997Sken ctl_be_block_lun_flags flags; 181229997Sken STAILQ_ENTRY(ctl_be_block_lun) links; 182229997Sken struct ctl_be_lun ctl_be_lun; 183229997Sken struct taskqueue *io_taskqueue; 184229997Sken struct task io_task; 185229997Sken int num_threads; 186229997Sken STAILQ_HEAD(, ctl_io_hdr) input_queue; 187275474Smav STAILQ_HEAD(, ctl_io_hdr) config_read_queue; 188229997Sken STAILQ_HEAD(, ctl_io_hdr) config_write_queue; 189229997Sken STAILQ_HEAD(, ctl_io_hdr) datamove_queue; 190267877Smav struct mtx_padalign io_lock; 191267877Smav struct mtx_padalign queue_lock; 192229997Sken}; 193229997Sken 194229997Sken/* 195229997Sken * Overall softc structure for the block backend module. 196229997Sken */ 197229997Skenstruct ctl_be_block_softc { 198229997Sken struct mtx lock; 199229997Sken int num_disks; 200229997Sken STAILQ_HEAD(, ctl_block_disk) disk_list; 201229997Sken int num_luns; 202229997Sken STAILQ_HEAD(, ctl_be_block_lun) lun_list; 203229997Sken}; 204229997Sken 205229997Skenstatic struct ctl_be_block_softc backend_block_softc; 206229997Sken 207229997Sken/* 208229997Sken * Per-I/O information. 209229997Sken */ 210229997Skenstruct ctl_be_block_io { 211229997Sken union ctl_io *io; 212229997Sken struct ctl_sg_entry sg_segs[CTLBLK_MAX_SEGS]; 213229997Sken struct iovec xiovecs[CTLBLK_MAX_SEGS]; 214229997Sken int bio_cmd; 215229997Sken int num_segs; 216229997Sken int num_bios_sent; 217229997Sken int num_bios_done; 218229997Sken int send_complete; 219229997Sken int num_errors; 220229997Sken struct bintime ds_t0; 221229997Sken devstat_tag_type ds_tag_type; 222229997Sken devstat_trans_flags ds_trans_type; 223229997Sken uint64_t io_len; 224229997Sken uint64_t io_offset; 225229997Sken struct ctl_be_block_softc *softc; 226229997Sken struct ctl_be_block_lun *lun; 227264274Smav void (*beio_cont)(struct ctl_be_block_io *beio); /* to continue processing */ 228229997Sken}; 229229997Sken 230229997Skenstatic int cbb_num_threads = 14; 231229997SkenSYSCTL_NODE(_kern_cam_ctl, OID_AUTO, block, CTLFLAG_RD, 0, 232229997Sken "CAM Target Layer Block Backend"); 233267992ShselaskySYSCTL_INT(_kern_cam_ctl_block, OID_AUTO, num_threads, CTLFLAG_RWTUN, 234229997Sken &cbb_num_threads, 0, "Number of threads per backing file"); 235229997Sken 236229997Skenstatic struct ctl_be_block_io *ctl_alloc_beio(struct ctl_be_block_softc *softc); 237229997Skenstatic void ctl_free_beio(struct ctl_be_block_io *beio); 238229997Skenstatic void ctl_complete_beio(struct ctl_be_block_io *beio); 239229997Skenstatic int ctl_be_block_move_done(union ctl_io *io); 240229997Skenstatic void ctl_be_block_biodone(struct bio *bio); 241229997Skenstatic void ctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 242229997Sken struct ctl_be_block_io *beio); 243229997Skenstatic void ctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 244229997Sken struct ctl_be_block_io *beio); 245275474Smavstatic void ctl_be_block_gls_file(struct ctl_be_block_lun *be_lun, 246275474Smav struct ctl_be_block_io *beio); 247275481Smavstatic uint64_t ctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, 248275481Smav const char *attrname); 249229997Skenstatic void ctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 250229997Sken struct ctl_be_block_io *beio); 251264274Smavstatic void ctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 252264274Smav struct ctl_be_block_io *beio); 253229997Skenstatic void ctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 254229997Sken struct ctl_be_block_io *beio); 255274154Smavstatic uint64_t ctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, 256274154Smav const char *attrname); 257275474Smavstatic void ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 258275474Smav union ctl_io *io); 259229997Skenstatic void ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 260229997Sken union ctl_io *io); 261229997Skenstatic void ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 262229997Sken union ctl_io *io); 263229997Skenstatic void ctl_be_block_worker(void *context, int pending); 264229997Skenstatic int ctl_be_block_submit(union ctl_io *io); 265229997Skenstatic int ctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 266229997Sken int flag, struct thread *td); 267229997Skenstatic int ctl_be_block_open_file(struct ctl_be_block_lun *be_lun, 268229997Sken struct ctl_lun_req *req); 269229997Skenstatic int ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, 270229997Sken struct ctl_lun_req *req); 271229997Skenstatic int ctl_be_block_close(struct ctl_be_block_lun *be_lun); 272229997Skenstatic int ctl_be_block_open(struct ctl_be_block_softc *softc, 273229997Sken struct ctl_be_block_lun *be_lun, 274229997Sken struct ctl_lun_req *req); 275229997Skenstatic int ctl_be_block_create(struct ctl_be_block_softc *softc, 276229997Sken struct ctl_lun_req *req); 277229997Skenstatic int ctl_be_block_rm(struct ctl_be_block_softc *softc, 278229997Sken struct ctl_lun_req *req); 279232604Straszstatic int ctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 280232604Strasz struct ctl_lun_req *req); 281232604Straszstatic int ctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 282232604Strasz struct ctl_lun_req *req); 283232604Straszstatic int ctl_be_block_modify(struct ctl_be_block_softc *softc, 284232604Strasz struct ctl_lun_req *req); 285229997Skenstatic void ctl_be_block_lun_shutdown(void *be_lun); 286229997Skenstatic void ctl_be_block_lun_config_status(void *be_lun, 287229997Sken ctl_lun_config_status status); 288229997Skenstatic int ctl_be_block_config_write(union ctl_io *io); 289229997Skenstatic int ctl_be_block_config_read(union ctl_io *io); 290229997Skenstatic int ctl_be_block_lun_info(void *be_lun, struct sbuf *sb); 291274154Smavstatic uint64_t ctl_be_block_lun_attr(void *be_lun, const char *attrname); 292229997Skenint ctl_be_block_init(void); 293229997Sken 294229997Skenstatic struct ctl_backend_driver ctl_be_block_driver = 295229997Sken{ 296230334Sken .name = "block", 297230334Sken .flags = CTL_BE_FLAG_HAS_CONFIG, 298230334Sken .init = ctl_be_block_init, 299230334Sken .data_submit = ctl_be_block_submit, 300230334Sken .data_move_done = ctl_be_block_move_done, 301230334Sken .config_read = ctl_be_block_config_read, 302230334Sken .config_write = ctl_be_block_config_write, 303230334Sken .ioctl = ctl_be_block_ioctl, 304274154Smav .lun_info = ctl_be_block_lun_info, 305274154Smav .lun_attr = ctl_be_block_lun_attr 306229997Sken}; 307229997Sken 308229997SkenMALLOC_DEFINE(M_CTLBLK, "ctlblk", "Memory used for CTL block backend"); 309229997SkenCTL_BACKEND_DECLARE(cbb, ctl_be_block_driver); 310229997Sken 311264020Straszstatic uma_zone_t beio_zone; 312264020Strasz 313229997Skenstatic struct ctl_be_block_io * 314229997Skenctl_alloc_beio(struct ctl_be_block_softc *softc) 315229997Sken{ 316229997Sken struct ctl_be_block_io *beio; 317229997Sken 318264020Strasz beio = uma_zalloc(beio_zone, M_WAITOK | M_ZERO); 319264020Strasz beio->softc = softc; 320229997Sken return (beio); 321229997Sken} 322229997Sken 323229997Skenstatic void 324229997Skenctl_free_beio(struct ctl_be_block_io *beio) 325229997Sken{ 326229997Sken int duplicate_free; 327229997Sken int i; 328229997Sken 329229997Sken duplicate_free = 0; 330229997Sken 331229997Sken for (i = 0; i < beio->num_segs; i++) { 332229997Sken if (beio->sg_segs[i].addr == NULL) 333229997Sken duplicate_free++; 334229997Sken 335229997Sken uma_zfree(beio->lun->lun_zone, beio->sg_segs[i].addr); 336229997Sken beio->sg_segs[i].addr = NULL; 337267537Smav 338267537Smav /* For compare we had two equal S/G lists. */ 339267537Smav if (ARGS(beio->io)->flags & CTL_LLF_COMPARE) { 340267537Smav uma_zfree(beio->lun->lun_zone, 341267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr); 342267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = NULL; 343267537Smav } 344229997Sken } 345229997Sken 346229997Sken if (duplicate_free > 0) { 347229997Sken printf("%s: %d duplicate frees out of %d segments\n", __func__, 348229997Sken duplicate_free, beio->num_segs); 349229997Sken } 350229997Sken 351264020Strasz uma_zfree(beio_zone, beio); 352229997Sken} 353229997Sken 354229997Skenstatic void 355229997Skenctl_complete_beio(struct ctl_be_block_io *beio) 356229997Sken{ 357267877Smav union ctl_io *io = beio->io; 358229997Sken 359264274Smav if (beio->beio_cont != NULL) { 360264274Smav beio->beio_cont(beio); 361264274Smav } else { 362264274Smav ctl_free_beio(beio); 363267537Smav ctl_data_submit_done(io); 364264274Smav } 365229997Sken} 366229997Sken 367229997Skenstatic int 368229997Skenctl_be_block_move_done(union ctl_io *io) 369229997Sken{ 370229997Sken struct ctl_be_block_io *beio; 371229997Sken struct ctl_be_block_lun *be_lun; 372267537Smav struct ctl_lba_len_flags *lbalen; 373229997Sken#ifdef CTL_TIME_IO 374229997Sken struct bintime cur_bt; 375267537Smav#endif 376267537Smav int i; 377229997Sken 378267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 379229997Sken be_lun = beio->lun; 380229997Sken 381229997Sken DPRINTF("entered\n"); 382229997Sken 383229997Sken#ifdef CTL_TIME_IO 384229997Sken getbintime(&cur_bt); 385229997Sken bintime_sub(&cur_bt, &io->io_hdr.dma_start_bt); 386229997Sken bintime_add(&io->io_hdr.dma_bt, &cur_bt); 387229997Sken io->io_hdr.num_dmas++; 388229997Sken#endif 389267537Smav io->scsiio.kern_rel_offset += io->scsiio.kern_data_len; 390229997Sken 391229997Sken /* 392229997Sken * We set status at this point for read commands, and write 393229997Sken * commands with errors. 394229997Sken */ 395275058Smav if (io->io_hdr.flags & CTL_FLAG_ABORT) { 396275058Smav ; 397275058Smav } else if ((io->io_hdr.port_status == 0) && 398267537Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) { 399267537Smav lbalen = ARGS(beio->io); 400267537Smav if (lbalen->flags & CTL_LLF_READ) { 401267537Smav ctl_set_success(&io->scsiio); 402267537Smav } else if (lbalen->flags & CTL_LLF_COMPARE) { 403267537Smav /* We have two data blocks ready for comparison. */ 404267537Smav for (i = 0; i < beio->num_segs; i++) { 405267537Smav if (memcmp(beio->sg_segs[i].addr, 406267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr, 407267537Smav beio->sg_segs[i].len) != 0) 408267537Smav break; 409267537Smav } 410267537Smav if (i < beio->num_segs) 411267537Smav ctl_set_sense(&io->scsiio, 412267537Smav /*current_error*/ 1, 413267537Smav /*sense_key*/ SSD_KEY_MISCOMPARE, 414267537Smav /*asc*/ 0x1D, 415267537Smav /*ascq*/ 0x00, 416267537Smav SSD_ELEM_NONE); 417267537Smav else 418267537Smav ctl_set_success(&io->scsiio); 419267537Smav } 420275058Smav } else if ((io->io_hdr.port_status != 0) && 421275058Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE || 422275058Smav (io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS)) { 423229997Sken /* 424229997Sken * For hardware error sense keys, the sense key 425229997Sken * specific value is defined to be a retry count, 426229997Sken * but we use it to pass back an internal FETD 427229997Sken * error code. XXX KDM Hopefully the FETD is only 428229997Sken * using 16 bits for an error code, since that's 429229997Sken * all the space we have in the sks field. 430229997Sken */ 431229997Sken ctl_set_internal_failure(&io->scsiio, 432229997Sken /*sks_valid*/ 1, 433229997Sken /*retry_count*/ 434229997Sken io->io_hdr.port_status); 435229997Sken } 436229997Sken 437229997Sken /* 438229997Sken * If this is a read, or a write with errors, it is done. 439229997Sken */ 440229997Sken if ((beio->bio_cmd == BIO_READ) 441229997Sken || ((io->io_hdr.flags & CTL_FLAG_ABORT) != 0) 442229997Sken || ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)) { 443229997Sken ctl_complete_beio(beio); 444229997Sken return (0); 445229997Sken } 446229997Sken 447229997Sken /* 448229997Sken * At this point, we have a write and the DMA completed 449229997Sken * successfully. We now have to queue it to the task queue to 450229997Sken * execute the backend I/O. That is because we do blocking 451229997Sken * memory allocations, and in the file backing case, blocking I/O. 452229997Sken * This move done routine is generally called in the SIM's 453229997Sken * interrupt context, and therefore we cannot block. 454229997Sken */ 455267877Smav mtx_lock(&be_lun->queue_lock); 456229997Sken /* 457229997Sken * XXX KDM make sure that links is okay to use at this point. 458229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 459229997Sken * or deal with resource allocation here. 460229997Sken */ 461229997Sken STAILQ_INSERT_TAIL(&be_lun->datamove_queue, &io->io_hdr, links); 462267877Smav mtx_unlock(&be_lun->queue_lock); 463229997Sken 464229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 465229997Sken 466229997Sken return (0); 467229997Sken} 468229997Sken 469229997Skenstatic void 470229997Skenctl_be_block_biodone(struct bio *bio) 471229997Sken{ 472229997Sken struct ctl_be_block_io *beio; 473229997Sken struct ctl_be_block_lun *be_lun; 474229997Sken union ctl_io *io; 475261538Smav int error; 476229997Sken 477229997Sken beio = bio->bio_caller1; 478229997Sken be_lun = beio->lun; 479229997Sken io = beio->io; 480229997Sken 481229997Sken DPRINTF("entered\n"); 482229997Sken 483261538Smav error = bio->bio_error; 484267877Smav mtx_lock(&be_lun->io_lock); 485261538Smav if (error != 0) 486229997Sken beio->num_errors++; 487229997Sken 488229997Sken beio->num_bios_done++; 489229997Sken 490229997Sken /* 491229997Sken * XXX KDM will this cause WITNESS to complain? Holding a lock 492229997Sken * during the free might cause it to complain. 493229997Sken */ 494229997Sken g_destroy_bio(bio); 495229997Sken 496229997Sken /* 497229997Sken * If the send complete bit isn't set, or we aren't the last I/O to 498229997Sken * complete, then we're done. 499229997Sken */ 500229997Sken if ((beio->send_complete == 0) 501229997Sken || (beio->num_bios_done < beio->num_bios_sent)) { 502267877Smav mtx_unlock(&be_lun->io_lock); 503229997Sken return; 504229997Sken } 505229997Sken 506229997Sken /* 507229997Sken * At this point, we've verified that we are the last I/O to 508229997Sken * complete, so it's safe to drop the lock. 509229997Sken */ 510267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 511267877Smav beio->ds_tag_type, beio->ds_trans_type, 512267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 513267877Smav mtx_unlock(&be_lun->io_lock); 514229997Sken 515229997Sken /* 516229997Sken * If there are any errors from the backing device, we fail the 517229997Sken * entire I/O with a medium error. 518229997Sken */ 519229997Sken if (beio->num_errors > 0) { 520261538Smav if (error == EOPNOTSUPP) { 521261538Smav ctl_set_invalid_opcode(&io->scsiio); 522273809Smav } else if (error == ENOSPC) { 523273809Smav ctl_set_space_alloc_fail(&io->scsiio); 524261538Smav } else if (beio->bio_cmd == BIO_FLUSH) { 525229997Sken /* XXX KDM is there is a better error here? */ 526229997Sken ctl_set_internal_failure(&io->scsiio, 527229997Sken /*sks_valid*/ 1, 528229997Sken /*retry_count*/ 0xbad2); 529229997Sken } else 530229997Sken ctl_set_medium_error(&io->scsiio); 531229997Sken ctl_complete_beio(beio); 532229997Sken return; 533229997Sken } 534229997Sken 535229997Sken /* 536267537Smav * If this is a write, a flush, a delete or verify, we're all done. 537229997Sken * If this is a read, we can now send the data to the user. 538229997Sken */ 539229997Sken if ((beio->bio_cmd == BIO_WRITE) 540264274Smav || (beio->bio_cmd == BIO_FLUSH) 541267537Smav || (beio->bio_cmd == BIO_DELETE) 542267537Smav || (ARGS(io)->flags & CTL_LLF_VERIFY)) { 543229997Sken ctl_set_success(&io->scsiio); 544229997Sken ctl_complete_beio(beio); 545229997Sken } else { 546275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 547275058Smav beio->beio_cont == NULL) 548275058Smav ctl_set_success(&io->scsiio); 549229997Sken#ifdef CTL_TIME_IO 550229997Sken getbintime(&io->io_hdr.dma_start_bt); 551229997Sken#endif 552229997Sken ctl_datamove(io); 553229997Sken } 554229997Sken} 555229997Sken 556229997Skenstatic void 557229997Skenctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 558229997Sken struct ctl_be_block_io *beio) 559229997Sken{ 560267877Smav union ctl_io *io = beio->io; 561229997Sken struct mount *mountpoint; 562241896Skib int error, lock_flags; 563229997Sken 564229997Sken DPRINTF("entered\n"); 565229997Sken 566267877Smav binuptime(&beio->ds_t0); 567267877Smav mtx_lock(&be_lun->io_lock); 568267877Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 569267877Smav mtx_unlock(&be_lun->io_lock); 570229997Sken 571267877Smav (void) vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 572229997Sken 573229997Sken if (MNT_SHARED_WRITES(mountpoint) 574229997Sken || ((mountpoint == NULL) 575229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 576229997Sken lock_flags = LK_SHARED; 577229997Sken else 578229997Sken lock_flags = LK_EXCLUSIVE; 579229997Sken 580229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 581229997Sken 582229997Sken error = VOP_FSYNC(be_lun->vn, MNT_WAIT, curthread); 583229997Sken VOP_UNLOCK(be_lun->vn, 0); 584229997Sken 585229997Sken vn_finished_write(mountpoint); 586229997Sken 587267877Smav mtx_lock(&be_lun->io_lock); 588267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 589267877Smav beio->ds_tag_type, beio->ds_trans_type, 590267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 591267877Smav mtx_unlock(&be_lun->io_lock); 592267877Smav 593229997Sken if (error == 0) 594229997Sken ctl_set_success(&io->scsiio); 595229997Sken else { 596229997Sken /* XXX KDM is there is a better error here? */ 597229997Sken ctl_set_internal_failure(&io->scsiio, 598229997Sken /*sks_valid*/ 1, 599229997Sken /*retry_count*/ 0xbad1); 600229997Sken } 601229997Sken 602229997Sken ctl_complete_beio(beio); 603229997Sken} 604229997Sken 605258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_start, "uint64_t"); 606258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_start, "uint64_t"); 607258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_done,"uint64_t"); 608258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_done, "uint64_t"); 609229997Sken 610229997Skenstatic void 611229997Skenctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 612229997Sken struct ctl_be_block_io *beio) 613229997Sken{ 614229997Sken struct ctl_be_block_filedata *file_data; 615229997Sken union ctl_io *io; 616229997Sken struct uio xuio; 617229997Sken struct iovec *xiovec; 618241896Skib int flags; 619229997Sken int error, i; 620229997Sken 621229997Sken DPRINTF("entered\n"); 622229997Sken 623229997Sken file_data = &be_lun->backend.file; 624229997Sken io = beio->io; 625271309Smav flags = 0; 626271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 627271309Smav flags |= IO_DIRECT; 628271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 629271309Smav flags |= IO_SYNC; 630229997Sken 631267537Smav bzero(&xuio, sizeof(xuio)); 632229997Sken if (beio->bio_cmd == BIO_READ) { 633229997Sken SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 634267537Smav xuio.uio_rw = UIO_READ; 635229997Sken } else { 636229997Sken SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 637267537Smav xuio.uio_rw = UIO_WRITE; 638229997Sken } 639229997Sken xuio.uio_offset = beio->io_offset; 640229997Sken xuio.uio_resid = beio->io_len; 641229997Sken xuio.uio_segflg = UIO_SYSSPACE; 642229997Sken xuio.uio_iov = beio->xiovecs; 643229997Sken xuio.uio_iovcnt = beio->num_segs; 644229997Sken xuio.uio_td = curthread; 645229997Sken 646229997Sken for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 647229997Sken xiovec->iov_base = beio->sg_segs[i].addr; 648229997Sken xiovec->iov_len = beio->sg_segs[i].len; 649229997Sken } 650229997Sken 651267877Smav binuptime(&beio->ds_t0); 652267877Smav mtx_lock(&be_lun->io_lock); 653267877Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 654267877Smav mtx_unlock(&be_lun->io_lock); 655267877Smav 656229997Sken if (beio->bio_cmd == BIO_READ) { 657229997Sken vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 658229997Sken 659229997Sken /* 660229997Sken * UFS pays attention to IO_DIRECT for reads. If the 661229997Sken * DIRECTIO option is configured into the kernel, it calls 662229997Sken * ffs_rawread(). But that only works for single-segment 663229997Sken * uios with user space addresses. In our case, with a 664229997Sken * kernel uio, it still reads into the buffer cache, but it 665229997Sken * will just try to release the buffer from the cache later 666229997Sken * on in ffs_read(). 667229997Sken * 668229997Sken * ZFS does not pay attention to IO_DIRECT for reads. 669229997Sken * 670229997Sken * UFS does not pay attention to IO_SYNC for reads. 671229997Sken * 672229997Sken * ZFS pays attention to IO_SYNC (which translates into the 673229997Sken * Solaris define FRSYNC for zfs_read()) for reads. It 674229997Sken * attempts to sync the file before reading. 675229997Sken * 676229997Sken * So, to attempt to provide some barrier semantics in the 677229997Sken * BIO_ORDERED case, set both IO_DIRECT and IO_SYNC. 678229997Sken */ 679271309Smav error = VOP_READ(be_lun->vn, &xuio, flags, file_data->cred); 680229997Sken 681229997Sken VOP_UNLOCK(be_lun->vn, 0); 682267537Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 683229997Sken } else { 684229997Sken struct mount *mountpoint; 685229997Sken int lock_flags; 686229997Sken 687229997Sken (void)vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 688229997Sken 689229997Sken if (MNT_SHARED_WRITES(mountpoint) 690229997Sken || ((mountpoint == NULL) 691229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 692229997Sken lock_flags = LK_SHARED; 693229997Sken else 694229997Sken lock_flags = LK_EXCLUSIVE; 695229997Sken 696229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 697229997Sken 698229997Sken /* 699229997Sken * UFS pays attention to IO_DIRECT for writes. The write 700229997Sken * is done asynchronously. (Normally the write would just 701229997Sken * get put into cache. 702229997Sken * 703229997Sken * UFS pays attention to IO_SYNC for writes. It will 704229997Sken * attempt to write the buffer out synchronously if that 705229997Sken * flag is set. 706229997Sken * 707229997Sken * ZFS does not pay attention to IO_DIRECT for writes. 708229997Sken * 709229997Sken * ZFS pays attention to IO_SYNC (a.k.a. FSYNC or FRSYNC) 710229997Sken * for writes. It will flush the transaction from the 711229997Sken * cache before returning. 712229997Sken * 713229997Sken * So if we've got the BIO_ORDERED flag set, we want 714229997Sken * IO_SYNC in either the UFS or ZFS case. 715229997Sken */ 716271309Smav error = VOP_WRITE(be_lun->vn, &xuio, flags, file_data->cred); 717229997Sken VOP_UNLOCK(be_lun->vn, 0); 718229997Sken 719229997Sken vn_finished_write(mountpoint); 720267537Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 721229997Sken } 722229997Sken 723267877Smav mtx_lock(&be_lun->io_lock); 724267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 725267877Smav beio->ds_tag_type, beio->ds_trans_type, 726267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 727267877Smav mtx_unlock(&be_lun->io_lock); 728267877Smav 729229997Sken /* 730229997Sken * If we got an error, set the sense data to "MEDIUM ERROR" and 731229997Sken * return the I/O to the user. 732229997Sken */ 733229997Sken if (error != 0) { 734229997Sken char path_str[32]; 735229997Sken 736229997Sken ctl_scsi_path_string(io, path_str, sizeof(path_str)); 737229997Sken printf("%s%s command returned errno %d\n", path_str, 738229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", error); 739273809Smav if (error == ENOSPC) { 740273809Smav ctl_set_space_alloc_fail(&io->scsiio); 741273809Smav } else 742273809Smav ctl_set_medium_error(&io->scsiio); 743229997Sken ctl_complete_beio(beio); 744229997Sken return; 745229997Sken } 746229997Sken 747229997Sken /* 748269122Smav * If this is a write or a verify, we're all done. 749229997Sken * If this is a read, we can now send the data to the user. 750229997Sken */ 751269122Smav if ((beio->bio_cmd == BIO_WRITE) || 752269122Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 753229997Sken ctl_set_success(&io->scsiio); 754229997Sken ctl_complete_beio(beio); 755229997Sken } else { 756275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 757275058Smav beio->beio_cont == NULL) 758275058Smav ctl_set_success(&io->scsiio); 759229997Sken#ifdef CTL_TIME_IO 760229997Sken getbintime(&io->io_hdr.dma_start_bt); 761229997Sken#endif 762229997Sken ctl_datamove(io); 763229997Sken } 764229997Sken} 765229997Sken 766229997Skenstatic void 767275474Smavctl_be_block_gls_file(struct ctl_be_block_lun *be_lun, 768275474Smav struct ctl_be_block_io *beio) 769275474Smav{ 770275474Smav union ctl_io *io = beio->io; 771275474Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 772275474Smav struct scsi_get_lba_status_data *data; 773275474Smav off_t roff, off; 774275474Smav int error, status; 775275474Smav 776275474Smav DPRINTF("entered\n"); 777275474Smav 778275474Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 779275474Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 780275474Smav error = VOP_IOCTL(be_lun->vn, FIOSEEKHOLE, &off, 781275474Smav 0, curthread->td_ucred, curthread); 782275474Smav if (error == 0 && off > roff) 783275474Smav status = 0; /* mapped up to off */ 784275474Smav else { 785275474Smav error = VOP_IOCTL(be_lun->vn, FIOSEEKDATA, &off, 786275474Smav 0, curthread->td_ucred, curthread); 787275474Smav if (error == 0 && off > roff) 788275474Smav status = 1; /* deallocated up to off */ 789275474Smav else { 790275474Smav status = 0; /* unknown up to the end */ 791275474Smav off = be_lun->size_bytes; 792275474Smav } 793275474Smav } 794275474Smav VOP_UNLOCK(be_lun->vn, 0); 795275474Smav 796275474Smav off >>= be_lun->blocksize_shift; 797275474Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 798275474Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 799275474Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 800275474Smav data->descr[0].length); 801275474Smav data->descr[0].status = status; 802275474Smav 803275474Smav ctl_complete_beio(beio); 804275474Smav} 805275474Smav 806275481Smavstatic uint64_t 807275481Smavctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, const char *attrname) 808275481Smav{ 809275481Smav struct vattr vattr; 810275481Smav struct statfs statfs; 811275481Smav int error; 812275481Smav 813275481Smav if (be_lun->vn == NULL) 814275481Smav return (UINT64_MAX); 815275481Smav if (strcmp(attrname, "blocksused") == 0) { 816275481Smav error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 817275481Smav if (error != 0) 818275481Smav return (UINT64_MAX); 819275481Smav return (vattr.va_bytes >> be_lun->blocksize_shift); 820275481Smav } 821275481Smav if (strcmp(attrname, "blocksavail") == 0) { 822275481Smav error = VFS_STATFS(be_lun->vn->v_mount, &statfs); 823275481Smav if (error != 0) 824275481Smav return (UINT64_MAX); 825275481Smav return ((statfs.f_bavail * statfs.f_bsize) >> 826275481Smav be_lun->blocksize_shift); 827275481Smav } 828275481Smav return (UINT64_MAX); 829275481Smav} 830275481Smav 831275474Smavstatic void 832269123Smavctl_be_block_dispatch_zvol(struct ctl_be_block_lun *be_lun, 833269123Smav struct ctl_be_block_io *beio) 834269123Smav{ 835269123Smav struct ctl_be_block_devdata *dev_data; 836269123Smav union ctl_io *io; 837269123Smav struct uio xuio; 838269123Smav struct iovec *xiovec; 839269123Smav int flags; 840269123Smav int error, i; 841269123Smav 842269123Smav DPRINTF("entered\n"); 843269123Smav 844269123Smav dev_data = &be_lun->backend.dev; 845269123Smav io = beio->io; 846271309Smav flags = 0; 847271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 848271309Smav flags |= IO_DIRECT; 849271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 850271309Smav flags |= IO_SYNC; 851269123Smav 852269123Smav bzero(&xuio, sizeof(xuio)); 853269123Smav if (beio->bio_cmd == BIO_READ) { 854269123Smav SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 855269123Smav xuio.uio_rw = UIO_READ; 856269123Smav } else { 857269123Smav SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 858269123Smav xuio.uio_rw = UIO_WRITE; 859269123Smav } 860269123Smav xuio.uio_offset = beio->io_offset; 861269123Smav xuio.uio_resid = beio->io_len; 862269123Smav xuio.uio_segflg = UIO_SYSSPACE; 863269123Smav xuio.uio_iov = beio->xiovecs; 864269123Smav xuio.uio_iovcnt = beio->num_segs; 865269123Smav xuio.uio_td = curthread; 866269123Smav 867269123Smav for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 868269123Smav xiovec->iov_base = beio->sg_segs[i].addr; 869269123Smav xiovec->iov_len = beio->sg_segs[i].len; 870269123Smav } 871269123Smav 872269123Smav binuptime(&beio->ds_t0); 873269123Smav mtx_lock(&be_lun->io_lock); 874269123Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 875269123Smav mtx_unlock(&be_lun->io_lock); 876269123Smav 877269123Smav if (beio->bio_cmd == BIO_READ) { 878271309Smav error = (*dev_data->csw->d_read)(dev_data->cdev, &xuio, flags); 879269123Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 880269123Smav } else { 881271309Smav error = (*dev_data->csw->d_write)(dev_data->cdev, &xuio, flags); 882269123Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 883269123Smav } 884269123Smav 885269123Smav mtx_lock(&be_lun->io_lock); 886269123Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 887269123Smav beio->ds_tag_type, beio->ds_trans_type, 888269123Smav /*now*/ NULL, /*then*/&beio->ds_t0); 889269123Smav mtx_unlock(&be_lun->io_lock); 890269123Smav 891269123Smav /* 892269123Smav * If we got an error, set the sense data to "MEDIUM ERROR" and 893269123Smav * return the I/O to the user. 894269123Smav */ 895269123Smav if (error != 0) { 896273809Smav if (error == ENOSPC) { 897273809Smav ctl_set_space_alloc_fail(&io->scsiio); 898273809Smav } else 899273809Smav ctl_set_medium_error(&io->scsiio); 900269123Smav ctl_complete_beio(beio); 901269123Smav return; 902269123Smav } 903269123Smav 904269123Smav /* 905269123Smav * If this is a write or a verify, we're all done. 906269123Smav * If this is a read, we can now send the data to the user. 907269123Smav */ 908269123Smav if ((beio->bio_cmd == BIO_WRITE) || 909269123Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 910269123Smav ctl_set_success(&io->scsiio); 911269123Smav ctl_complete_beio(beio); 912269123Smav } else { 913275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 914275058Smav beio->beio_cont == NULL) 915275058Smav ctl_set_success(&io->scsiio); 916269123Smav#ifdef CTL_TIME_IO 917269123Smav getbintime(&io->io_hdr.dma_start_bt); 918269123Smav#endif 919269123Smav ctl_datamove(io); 920269123Smav } 921269123Smav} 922269123Smav 923269123Smavstatic void 924275474Smavctl_be_block_gls_zvol(struct ctl_be_block_lun *be_lun, 925275474Smav struct ctl_be_block_io *beio) 926275474Smav{ 927275474Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 928275474Smav union ctl_io *io = beio->io; 929275474Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 930275474Smav struct scsi_get_lba_status_data *data; 931275474Smav off_t roff, off; 932275474Smav int error, status; 933275474Smav 934275474Smav DPRINTF("entered\n"); 935275474Smav 936275474Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 937275474Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKHOLE, 938275474Smav (caddr_t)&off, FREAD, curthread); 939275474Smav if (error == 0 && off > roff) 940275474Smav status = 0; /* mapped up to off */ 941275474Smav else { 942275474Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKDATA, 943275474Smav (caddr_t)&off, FREAD, curthread); 944275474Smav if (error == 0 && off > roff) 945275474Smav status = 1; /* deallocated up to off */ 946275474Smav else { 947275474Smav status = 0; /* unknown up to the end */ 948275474Smav off = be_lun->size_bytes; 949275474Smav } 950275474Smav } 951275474Smav 952275474Smav off >>= be_lun->blocksize_shift; 953275474Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 954275474Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 955275474Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 956275474Smav data->descr[0].length); 957275474Smav data->descr[0].status = status; 958275474Smav 959275474Smav ctl_complete_beio(beio); 960275474Smav} 961275474Smav 962275474Smavstatic void 963229997Skenctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 964229997Sken struct ctl_be_block_io *beio) 965229997Sken{ 966229997Sken struct bio *bio; 967229997Sken union ctl_io *io; 968229997Sken struct ctl_be_block_devdata *dev_data; 969229997Sken 970229997Sken dev_data = &be_lun->backend.dev; 971229997Sken io = beio->io; 972229997Sken 973229997Sken DPRINTF("entered\n"); 974229997Sken 975229997Sken /* This can't fail, it's a blocking allocation. */ 976229997Sken bio = g_alloc_bio(); 977229997Sken 978229997Sken bio->bio_cmd = BIO_FLUSH; 979229997Sken bio->bio_flags |= BIO_ORDERED; 980229997Sken bio->bio_dev = dev_data->cdev; 981229997Sken bio->bio_offset = 0; 982229997Sken bio->bio_data = 0; 983229997Sken bio->bio_done = ctl_be_block_biodone; 984229997Sken bio->bio_caller1 = beio; 985229997Sken bio->bio_pblkno = 0; 986229997Sken 987229997Sken /* 988229997Sken * We don't need to acquire the LUN lock here, because we are only 989229997Sken * sending one bio, and so there is no other context to synchronize 990229997Sken * with. 991229997Sken */ 992229997Sken beio->num_bios_sent = 1; 993229997Sken beio->send_complete = 1; 994229997Sken 995229997Sken binuptime(&beio->ds_t0); 996267877Smav mtx_lock(&be_lun->io_lock); 997229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 998267877Smav mtx_unlock(&be_lun->io_lock); 999229997Sken 1000229997Sken (*dev_data->csw->d_strategy)(bio); 1001229997Sken} 1002229997Sken 1003229997Skenstatic void 1004264274Smavctl_be_block_unmap_dev_range(struct ctl_be_block_lun *be_lun, 1005264274Smav struct ctl_be_block_io *beio, 1006264274Smav uint64_t off, uint64_t len, int last) 1007264274Smav{ 1008264274Smav struct bio *bio; 1009264274Smav struct ctl_be_block_devdata *dev_data; 1010264296Smav uint64_t maxlen; 1011264274Smav 1012264274Smav dev_data = &be_lun->backend.dev; 1013264296Smav maxlen = LONG_MAX - (LONG_MAX % be_lun->blocksize); 1014264274Smav while (len > 0) { 1015264274Smav bio = g_alloc_bio(); 1016264274Smav bio->bio_cmd = BIO_DELETE; 1017264274Smav bio->bio_dev = dev_data->cdev; 1018264274Smav bio->bio_offset = off; 1019264296Smav bio->bio_length = MIN(len, maxlen); 1020264274Smav bio->bio_data = 0; 1021264274Smav bio->bio_done = ctl_be_block_biodone; 1022264274Smav bio->bio_caller1 = beio; 1023264296Smav bio->bio_pblkno = off / be_lun->blocksize; 1024264274Smav 1025264274Smav off += bio->bio_length; 1026264274Smav len -= bio->bio_length; 1027264274Smav 1028267877Smav mtx_lock(&be_lun->io_lock); 1029264274Smav beio->num_bios_sent++; 1030264274Smav if (last && len == 0) 1031264274Smav beio->send_complete = 1; 1032267877Smav mtx_unlock(&be_lun->io_lock); 1033264274Smav 1034264274Smav (*dev_data->csw->d_strategy)(bio); 1035264274Smav } 1036264274Smav} 1037264274Smav 1038264274Smavstatic void 1039264274Smavctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 1040264274Smav struct ctl_be_block_io *beio) 1041264274Smav{ 1042264274Smav union ctl_io *io; 1043264274Smav struct ctl_be_block_devdata *dev_data; 1044267515Smav struct ctl_ptr_len_flags *ptrlen; 1045264274Smav struct scsi_unmap_desc *buf, *end; 1046264274Smav uint64_t len; 1047264274Smav 1048264274Smav dev_data = &be_lun->backend.dev; 1049264274Smav io = beio->io; 1050264274Smav 1051264274Smav DPRINTF("entered\n"); 1052264274Smav 1053264274Smav binuptime(&beio->ds_t0); 1054267877Smav mtx_lock(&be_lun->io_lock); 1055264274Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1056267877Smav mtx_unlock(&be_lun->io_lock); 1057264274Smav 1058264274Smav if (beio->io_offset == -1) { 1059264274Smav beio->io_len = 0; 1060267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1061267515Smav buf = (struct scsi_unmap_desc *)ptrlen->ptr; 1062267515Smav end = buf + ptrlen->len / sizeof(*buf); 1063264274Smav for (; buf < end; buf++) { 1064264274Smav len = (uint64_t)scsi_4btoul(buf->length) * 1065264274Smav be_lun->blocksize; 1066264274Smav beio->io_len += len; 1067264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1068264274Smav scsi_8btou64(buf->lba) * be_lun->blocksize, len, 1069264283Smav (end - buf < 2) ? TRUE : FALSE); 1070264274Smav } 1071264274Smav } else 1072264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1073264274Smav beio->io_offset, beio->io_len, TRUE); 1074264274Smav} 1075264274Smav 1076264274Smavstatic void 1077229997Skenctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 1078229997Sken struct ctl_be_block_io *beio) 1079229997Sken{ 1080267877Smav TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 1081229997Sken int i; 1082229997Sken struct bio *bio; 1083229997Sken struct ctl_be_block_devdata *dev_data; 1084229997Sken off_t cur_offset; 1085229997Sken int max_iosize; 1086229997Sken 1087229997Sken DPRINTF("entered\n"); 1088229997Sken 1089229997Sken dev_data = &be_lun->backend.dev; 1090229997Sken 1091229997Sken /* 1092229997Sken * We have to limit our I/O size to the maximum supported by the 1093229997Sken * backend device. Hopefully it is MAXPHYS. If the driver doesn't 1094229997Sken * set it properly, use DFLTPHYS. 1095229997Sken */ 1096229997Sken max_iosize = dev_data->cdev->si_iosize_max; 1097229997Sken if (max_iosize < PAGE_SIZE) 1098229997Sken max_iosize = DFLTPHYS; 1099229997Sken 1100229997Sken cur_offset = beio->io_offset; 1101229997Sken for (i = 0; i < beio->num_segs; i++) { 1102229997Sken size_t cur_size; 1103229997Sken uint8_t *cur_ptr; 1104229997Sken 1105229997Sken cur_size = beio->sg_segs[i].len; 1106229997Sken cur_ptr = beio->sg_segs[i].addr; 1107229997Sken 1108229997Sken while (cur_size > 0) { 1109229997Sken /* This can't fail, it's a blocking allocation. */ 1110229997Sken bio = g_alloc_bio(); 1111229997Sken 1112229997Sken KASSERT(bio != NULL, ("g_alloc_bio() failed!\n")); 1113229997Sken 1114229997Sken bio->bio_cmd = beio->bio_cmd; 1115229997Sken bio->bio_dev = dev_data->cdev; 1116229997Sken bio->bio_caller1 = beio; 1117229997Sken bio->bio_length = min(cur_size, max_iosize); 1118229997Sken bio->bio_offset = cur_offset; 1119229997Sken bio->bio_data = cur_ptr; 1120229997Sken bio->bio_done = ctl_be_block_biodone; 1121229997Sken bio->bio_pblkno = cur_offset / be_lun->blocksize; 1122229997Sken 1123229997Sken cur_offset += bio->bio_length; 1124229997Sken cur_ptr += bio->bio_length; 1125229997Sken cur_size -= bio->bio_length; 1126229997Sken 1127267877Smav TAILQ_INSERT_TAIL(&queue, bio, bio_queue); 1128229997Sken beio->num_bios_sent++; 1129229997Sken } 1130229997Sken } 1131267877Smav binuptime(&beio->ds_t0); 1132267877Smav mtx_lock(&be_lun->io_lock); 1133267877Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1134267877Smav beio->send_complete = 1; 1135267877Smav mtx_unlock(&be_lun->io_lock); 1136267877Smav 1137267877Smav /* 1138267877Smav * Fire off all allocated requests! 1139267877Smav */ 1140267877Smav while ((bio = TAILQ_FIRST(&queue)) != NULL) { 1141267877Smav TAILQ_REMOVE(&queue, bio, bio_queue); 1142267877Smav (*dev_data->csw->d_strategy)(bio); 1143267877Smav } 1144229997Sken} 1145229997Sken 1146274154Smavstatic uint64_t 1147274154Smavctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, const char *attrname) 1148274154Smav{ 1149274154Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 1150274154Smav struct diocgattr_arg arg; 1151274154Smav int error; 1152274154Smav 1153274154Smav if (dev_data->csw == NULL || dev_data->csw->d_ioctl == NULL) 1154274154Smav return (UINT64_MAX); 1155274154Smav strlcpy(arg.name, attrname, sizeof(arg.name)); 1156274154Smav arg.len = sizeof(arg.value.off); 1157274154Smav error = dev_data->csw->d_ioctl(dev_data->cdev, 1158274154Smav DIOCGATTR, (caddr_t)&arg, FREAD, curthread); 1159274154Smav if (error != 0) 1160274154Smav return (UINT64_MAX); 1161274154Smav return (arg.value.off); 1162274154Smav} 1163274154Smav 1164229997Skenstatic void 1165264274Smavctl_be_block_cw_done_ws(struct ctl_be_block_io *beio) 1166264274Smav{ 1167264274Smav union ctl_io *io; 1168264274Smav 1169264274Smav io = beio->io; 1170264274Smav ctl_free_beio(beio); 1171267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1172267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1173267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1174264274Smav ctl_config_write_done(io); 1175264274Smav return; 1176264274Smav } 1177264274Smav 1178264274Smav ctl_be_block_config_write(io); 1179264274Smav} 1180264274Smav 1181264274Smavstatic void 1182264274Smavctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun, 1183264274Smav union ctl_io *io) 1184264274Smav{ 1185264274Smav struct ctl_be_block_io *beio; 1186264274Smav struct ctl_be_block_softc *softc; 1187267515Smav struct ctl_lba_len_flags *lbalen; 1188264274Smav uint64_t len_left, lba; 1189264274Smav int i, seglen; 1190264274Smav uint8_t *buf, *end; 1191264274Smav 1192264274Smav DPRINTF("entered\n"); 1193264274Smav 1194267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1195264274Smav softc = be_lun->softc; 1196267537Smav lbalen = ARGS(beio->io); 1197264274Smav 1198271839Smav if (lbalen->flags & ~(SWS_LBDATA | SWS_UNMAP | SWS_ANCHOR | SWS_NDOB) || 1199269622Smav (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR) && be_lun->unmap == NULL)) { 1200264274Smav ctl_free_beio(beio); 1201264274Smav ctl_set_invalid_field(&io->scsiio, 1202264274Smav /*sks_valid*/ 1, 1203264274Smav /*command*/ 1, 1204264274Smav /*field*/ 1, 1205264274Smav /*bit_valid*/ 0, 1206264274Smav /*bit*/ 0); 1207264274Smav ctl_config_write_done(io); 1208264274Smav return; 1209264274Smav } 1210264274Smav 1211264274Smav switch (io->scsiio.tag_type) { 1212264274Smav case CTL_TAG_ORDERED: 1213264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1214264274Smav break; 1215264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1216264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1217264274Smav break; 1218264274Smav case CTL_TAG_UNTAGGED: 1219264274Smav case CTL_TAG_SIMPLE: 1220264274Smav case CTL_TAG_ACA: 1221264274Smav default: 1222264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1223264274Smav break; 1224264274Smav } 1225264274Smav 1226269622Smav if (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR)) { 1227267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1228267515Smav beio->io_len = (uint64_t)lbalen->len * be_lun->blocksize; 1229264274Smav beio->bio_cmd = BIO_DELETE; 1230264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1231264274Smav 1232264274Smav be_lun->unmap(be_lun, beio); 1233264274Smav return; 1234264274Smav } 1235264274Smav 1236264274Smav beio->bio_cmd = BIO_WRITE; 1237264274Smav beio->ds_trans_type = DEVSTAT_WRITE; 1238264274Smav 1239264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1240267515Smav (uintmax_t)lbalen->lba, lbalen->len); 1241264274Smav 1242267515Smav len_left = (uint64_t)lbalen->len * be_lun->blocksize; 1243264274Smav for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) { 1244264274Smav 1245264274Smav /* 1246264274Smav * Setup the S/G entry for this chunk. 1247264274Smav */ 1248264886Smav seglen = MIN(CTLBLK_MAX_SEG, len_left); 1249264274Smav seglen -= seglen % be_lun->blocksize; 1250264274Smav beio->sg_segs[i].len = seglen; 1251264274Smav beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1252264274Smav 1253264274Smav DPRINTF("segment %d addr %p len %zd\n", i, 1254264274Smav beio->sg_segs[i].addr, beio->sg_segs[i].len); 1255264274Smav 1256264274Smav beio->num_segs++; 1257264274Smav len_left -= seglen; 1258264274Smav 1259264274Smav buf = beio->sg_segs[i].addr; 1260264274Smav end = buf + seglen; 1261264274Smav for (; buf < end; buf += be_lun->blocksize) { 1262264274Smav memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize); 1263267515Smav if (lbalen->flags & SWS_LBDATA) 1264267515Smav scsi_ulto4b(lbalen->lba + lba, buf); 1265264274Smav lba++; 1266264274Smav } 1267264274Smav } 1268264274Smav 1269267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1270264274Smav beio->io_len = lba * be_lun->blocksize; 1271264274Smav 1272264274Smav /* We can not do all in one run. Correct and schedule rerun. */ 1273264274Smav if (len_left > 0) { 1274267515Smav lbalen->lba += lba; 1275267515Smav lbalen->len -= lba; 1276264274Smav beio->beio_cont = ctl_be_block_cw_done_ws; 1277264274Smav } 1278264274Smav 1279264274Smav be_lun->dispatch(be_lun, beio); 1280264274Smav} 1281264274Smav 1282264274Smavstatic void 1283264274Smavctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun, 1284264274Smav union ctl_io *io) 1285264274Smav{ 1286264274Smav struct ctl_be_block_io *beio; 1287264274Smav struct ctl_be_block_softc *softc; 1288267515Smav struct ctl_ptr_len_flags *ptrlen; 1289264274Smav 1290264274Smav DPRINTF("entered\n"); 1291264274Smav 1292267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1293264274Smav softc = be_lun->softc; 1294267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1295264274Smav 1296269622Smav if ((ptrlen->flags & ~SU_ANCHOR) != 0 || be_lun->unmap == NULL) { 1297264274Smav ctl_free_beio(beio); 1298264274Smav ctl_set_invalid_field(&io->scsiio, 1299264274Smav /*sks_valid*/ 0, 1300264274Smav /*command*/ 1, 1301264274Smav /*field*/ 0, 1302264274Smav /*bit_valid*/ 0, 1303264274Smav /*bit*/ 0); 1304264274Smav ctl_config_write_done(io); 1305264274Smav return; 1306264274Smav } 1307264274Smav 1308264274Smav switch (io->scsiio.tag_type) { 1309264274Smav case CTL_TAG_ORDERED: 1310264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1311264274Smav break; 1312264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1313264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1314264274Smav break; 1315264274Smav case CTL_TAG_UNTAGGED: 1316264274Smav case CTL_TAG_SIMPLE: 1317264274Smav case CTL_TAG_ACA: 1318264274Smav default: 1319264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1320264274Smav break; 1321264274Smav } 1322264274Smav 1323264274Smav beio->io_len = 0; 1324264274Smav beio->io_offset = -1; 1325264274Smav 1326264274Smav beio->bio_cmd = BIO_DELETE; 1327264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1328264274Smav 1329267515Smav DPRINTF("UNMAP\n"); 1330264274Smav 1331264274Smav be_lun->unmap(be_lun, beio); 1332264274Smav} 1333264274Smav 1334264274Smavstatic void 1335275474Smavctl_be_block_cr_done(struct ctl_be_block_io *beio) 1336275474Smav{ 1337275474Smav union ctl_io *io; 1338275474Smav 1339275474Smav io = beio->io; 1340275474Smav ctl_free_beio(beio); 1341275474Smav ctl_config_read_done(io); 1342275474Smav} 1343275474Smav 1344275474Smavstatic void 1345275474Smavctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 1346275474Smav union ctl_io *io) 1347275474Smav{ 1348275474Smav struct ctl_be_block_io *beio; 1349275474Smav struct ctl_be_block_softc *softc; 1350275474Smav 1351275474Smav DPRINTF("entered\n"); 1352275474Smav 1353275474Smav softc = be_lun->softc; 1354275474Smav beio = ctl_alloc_beio(softc); 1355275474Smav beio->io = io; 1356275474Smav beio->lun = be_lun; 1357275474Smav beio->beio_cont = ctl_be_block_cr_done; 1358275474Smav PRIV(io)->ptr = (void *)beio; 1359275474Smav 1360275474Smav switch (io->scsiio.cdb[0]) { 1361275474Smav case SERVICE_ACTION_IN: /* GET LBA STATUS */ 1362275474Smav beio->bio_cmd = -1; 1363275474Smav beio->ds_trans_type = DEVSTAT_NO_DATA; 1364275474Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1365275474Smav beio->io_len = 0; 1366275474Smav if (be_lun->get_lba_status) 1367275474Smav be_lun->get_lba_status(be_lun, beio); 1368275474Smav else 1369275474Smav ctl_be_block_cr_done(beio); 1370275474Smav break; 1371275474Smav default: 1372275474Smav panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1373275474Smav break; 1374275474Smav } 1375275474Smav} 1376275474Smav 1377275474Smavstatic void 1378264274Smavctl_be_block_cw_done(struct ctl_be_block_io *beio) 1379264274Smav{ 1380264274Smav union ctl_io *io; 1381264274Smav 1382264274Smav io = beio->io; 1383264274Smav ctl_free_beio(beio); 1384264274Smav ctl_config_write_done(io); 1385264274Smav} 1386264274Smav 1387264274Smavstatic void 1388229997Skenctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 1389229997Sken union ctl_io *io) 1390229997Sken{ 1391229997Sken struct ctl_be_block_io *beio; 1392229997Sken struct ctl_be_block_softc *softc; 1393229997Sken 1394229997Sken DPRINTF("entered\n"); 1395229997Sken 1396229997Sken softc = be_lun->softc; 1397229997Sken beio = ctl_alloc_beio(softc); 1398229997Sken beio->io = io; 1399229997Sken beio->lun = be_lun; 1400264274Smav beio->beio_cont = ctl_be_block_cw_done; 1401267519Smav PRIV(io)->ptr = (void *)beio; 1402229997Sken 1403229997Sken switch (io->scsiio.cdb[0]) { 1404229997Sken case SYNCHRONIZE_CACHE: 1405229997Sken case SYNCHRONIZE_CACHE_16: 1406249194Strasz beio->bio_cmd = BIO_FLUSH; 1407229997Sken beio->ds_trans_type = DEVSTAT_NO_DATA; 1408229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1409229997Sken beio->io_len = 0; 1410229997Sken be_lun->lun_flush(be_lun, beio); 1411229997Sken break; 1412264274Smav case WRITE_SAME_10: 1413264274Smav case WRITE_SAME_16: 1414264274Smav ctl_be_block_cw_dispatch_ws(be_lun, io); 1415264274Smav break; 1416264274Smav case UNMAP: 1417264274Smav ctl_be_block_cw_dispatch_unmap(be_lun, io); 1418264274Smav break; 1419229997Sken default: 1420229997Sken panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1421229997Sken break; 1422229997Sken } 1423229997Sken} 1424229997Sken 1425258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t"); 1426258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t"); 1427258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t"); 1428258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t"); 1429229997Sken 1430229997Skenstatic void 1431264886Smavctl_be_block_next(struct ctl_be_block_io *beio) 1432264886Smav{ 1433264886Smav struct ctl_be_block_lun *be_lun; 1434264886Smav union ctl_io *io; 1435264886Smav 1436264886Smav io = beio->io; 1437264886Smav be_lun = beio->lun; 1438264886Smav ctl_free_beio(beio); 1439267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1440267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1441267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1442267537Smav ctl_data_submit_done(io); 1443264886Smav return; 1444264886Smav } 1445264886Smav 1446264886Smav io->io_hdr.status &= ~CTL_STATUS_MASK; 1447264886Smav io->io_hdr.status |= CTL_STATUS_NONE; 1448264886Smav 1449267877Smav mtx_lock(&be_lun->queue_lock); 1450264886Smav /* 1451264886Smav * XXX KDM make sure that links is okay to use at this point. 1452264886Smav * Otherwise, we either need to add another field to ctl_io_hdr, 1453264886Smav * or deal with resource allocation here. 1454264886Smav */ 1455264886Smav STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1456267877Smav mtx_unlock(&be_lun->queue_lock); 1457264886Smav 1458264886Smav taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1459264886Smav} 1460264886Smav 1461264886Smavstatic void 1462229997Skenctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 1463229997Sken union ctl_io *io) 1464229997Sken{ 1465229997Sken struct ctl_be_block_io *beio; 1466229997Sken struct ctl_be_block_softc *softc; 1467267537Smav struct ctl_lba_len_flags *lbalen; 1468267519Smav struct ctl_ptr_len_flags *bptrlen; 1469267519Smav uint64_t len_left, lbas; 1470229997Sken int i; 1471229997Sken 1472229997Sken softc = be_lun->softc; 1473229997Sken 1474229997Sken DPRINTF("entered\n"); 1475229997Sken 1476267537Smav lbalen = ARGS(io); 1477267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1478267537Smav SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0); 1479267537Smav } else { 1480229997Sken SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0); 1481229997Sken } 1482229997Sken 1483229997Sken beio = ctl_alloc_beio(softc); 1484229997Sken beio->io = io; 1485229997Sken beio->lun = be_lun; 1486267519Smav bptrlen = PRIV(io); 1487267519Smav bptrlen->ptr = (void *)beio; 1488229997Sken 1489229997Sken switch (io->scsiio.tag_type) { 1490229997Sken case CTL_TAG_ORDERED: 1491229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1492229997Sken break; 1493229997Sken case CTL_TAG_HEAD_OF_QUEUE: 1494229997Sken beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1495229997Sken break; 1496229997Sken case CTL_TAG_UNTAGGED: 1497229997Sken case CTL_TAG_SIMPLE: 1498229997Sken case CTL_TAG_ACA: 1499229997Sken default: 1500229997Sken beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1501229997Sken break; 1502229997Sken } 1503229997Sken 1504267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1505267537Smav beio->bio_cmd = BIO_WRITE; 1506267537Smav beio->ds_trans_type = DEVSTAT_WRITE; 1507267537Smav } else { 1508229997Sken beio->bio_cmd = BIO_READ; 1509229997Sken beio->ds_trans_type = DEVSTAT_READ; 1510229997Sken } 1511229997Sken 1512264886Smav DPRINTF("%s at LBA %jx len %u @%ju\n", 1513229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", 1514267519Smav (uintmax_t)lbalen->lba, lbalen->len, bptrlen->len); 1515267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1516267537Smav lbas = CTLBLK_HALF_IO_SIZE; 1517267537Smav else 1518267537Smav lbas = CTLBLK_MAX_IO_SIZE; 1519267537Smav lbas = MIN(lbalen->len - bptrlen->len, lbas / be_lun->blocksize); 1520267519Smav beio->io_offset = (lbalen->lba + bptrlen->len) * be_lun->blocksize; 1521267519Smav beio->io_len = lbas * be_lun->blocksize; 1522267519Smav bptrlen->len += lbas; 1523229997Sken 1524264886Smav for (i = 0, len_left = beio->io_len; len_left > 0; i++) { 1525264886Smav KASSERT(i < CTLBLK_MAX_SEGS, ("Too many segs (%d >= %d)", 1526264886Smav i, CTLBLK_MAX_SEGS)); 1527229997Sken 1528229997Sken /* 1529229997Sken * Setup the S/G entry for this chunk. 1530229997Sken */ 1531264886Smav beio->sg_segs[i].len = min(CTLBLK_MAX_SEG, len_left); 1532229997Sken beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1533229997Sken 1534229997Sken DPRINTF("segment %d addr %p len %zd\n", i, 1535229997Sken beio->sg_segs[i].addr, beio->sg_segs[i].len); 1536229997Sken 1537267537Smav /* Set up second segment for compare operation. */ 1538267537Smav if (lbalen->flags & CTL_LLF_COMPARE) { 1539267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].len = 1540267537Smav beio->sg_segs[i].len; 1541267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = 1542267537Smav uma_zalloc(be_lun->lun_zone, M_WAITOK); 1543267537Smav } 1544267537Smav 1545229997Sken beio->num_segs++; 1546229997Sken len_left -= beio->sg_segs[i].len; 1547229997Sken } 1548267519Smav if (bptrlen->len < lbalen->len) 1549264886Smav beio->beio_cont = ctl_be_block_next; 1550264886Smav io->scsiio.be_move_done = ctl_be_block_move_done; 1551267537Smav /* For compare we have separate S/G lists for read and datamove. */ 1552267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1553267537Smav io->scsiio.kern_data_ptr = (uint8_t *)&beio->sg_segs[CTLBLK_HALF_SEGS]; 1554267537Smav else 1555267537Smav io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 1556264886Smav io->scsiio.kern_data_len = beio->io_len; 1557264886Smav io->scsiio.kern_data_resid = 0; 1558264886Smav io->scsiio.kern_sg_entries = beio->num_segs; 1559264886Smav io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 1560229997Sken 1561229997Sken /* 1562229997Sken * For the read case, we need to read the data into our buffers and 1563229997Sken * then we can send it back to the user. For the write case, we 1564229997Sken * need to get the data from the user first. 1565229997Sken */ 1566229997Sken if (beio->bio_cmd == BIO_READ) { 1567229997Sken SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0); 1568229997Sken be_lun->dispatch(be_lun, beio); 1569229997Sken } else { 1570229997Sken SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0); 1571229997Sken#ifdef CTL_TIME_IO 1572229997Sken getbintime(&io->io_hdr.dma_start_bt); 1573229997Sken#endif 1574229997Sken ctl_datamove(io); 1575229997Sken } 1576229997Sken} 1577229997Sken 1578229997Skenstatic void 1579229997Skenctl_be_block_worker(void *context, int pending) 1580229997Sken{ 1581229997Sken struct ctl_be_block_lun *be_lun; 1582229997Sken struct ctl_be_block_softc *softc; 1583229997Sken union ctl_io *io; 1584229997Sken 1585229997Sken be_lun = (struct ctl_be_block_lun *)context; 1586229997Sken softc = be_lun->softc; 1587229997Sken 1588229997Sken DPRINTF("entered\n"); 1589229997Sken 1590267877Smav mtx_lock(&be_lun->queue_lock); 1591229997Sken for (;;) { 1592229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue); 1593229997Sken if (io != NULL) { 1594229997Sken struct ctl_be_block_io *beio; 1595229997Sken 1596229997Sken DPRINTF("datamove queue\n"); 1597229997Sken 1598229997Sken STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr, 1599229997Sken ctl_io_hdr, links); 1600229997Sken 1601267877Smav mtx_unlock(&be_lun->queue_lock); 1602229997Sken 1603267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1604229997Sken 1605229997Sken be_lun->dispatch(be_lun, beio); 1606229997Sken 1607267877Smav mtx_lock(&be_lun->queue_lock); 1608229997Sken continue; 1609229997Sken } 1610229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue); 1611229997Sken if (io != NULL) { 1612229997Sken DPRINTF("config write queue\n"); 1613229997Sken STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr, 1614229997Sken ctl_io_hdr, links); 1615267877Smav mtx_unlock(&be_lun->queue_lock); 1616229997Sken ctl_be_block_cw_dispatch(be_lun, io); 1617267877Smav mtx_lock(&be_lun->queue_lock); 1618229997Sken continue; 1619229997Sken } 1620275474Smav io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_read_queue); 1621275474Smav if (io != NULL) { 1622275474Smav DPRINTF("config read queue\n"); 1623275474Smav STAILQ_REMOVE(&be_lun->config_read_queue, &io->io_hdr, 1624275474Smav ctl_io_hdr, links); 1625275474Smav mtx_unlock(&be_lun->queue_lock); 1626275474Smav ctl_be_block_cr_dispatch(be_lun, io); 1627275474Smav mtx_lock(&be_lun->queue_lock); 1628275474Smav continue; 1629275474Smav } 1630229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue); 1631229997Sken if (io != NULL) { 1632229997Sken DPRINTF("input queue\n"); 1633229997Sken 1634229997Sken STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr, 1635229997Sken ctl_io_hdr, links); 1636267877Smav mtx_unlock(&be_lun->queue_lock); 1637229997Sken 1638229997Sken /* 1639229997Sken * We must drop the lock, since this routine and 1640229997Sken * its children may sleep. 1641229997Sken */ 1642229997Sken ctl_be_block_dispatch(be_lun, io); 1643229997Sken 1644267877Smav mtx_lock(&be_lun->queue_lock); 1645229997Sken continue; 1646229997Sken } 1647229997Sken 1648229997Sken /* 1649229997Sken * If we get here, there is no work left in the queues, so 1650229997Sken * just break out and let the task queue go to sleep. 1651229997Sken */ 1652229997Sken break; 1653229997Sken } 1654267877Smav mtx_unlock(&be_lun->queue_lock); 1655229997Sken} 1656229997Sken 1657229997Sken/* 1658229997Sken * Entry point from CTL to the backend for I/O. We queue everything to a 1659229997Sken * work thread, so this just puts the I/O on a queue and wakes up the 1660229997Sken * thread. 1661229997Sken */ 1662229997Skenstatic int 1663229997Skenctl_be_block_submit(union ctl_io *io) 1664229997Sken{ 1665229997Sken struct ctl_be_block_lun *be_lun; 1666229997Sken struct ctl_be_lun *ctl_be_lun; 1667229997Sken 1668229997Sken DPRINTF("entered\n"); 1669229997Sken 1670229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 1671229997Sken CTL_PRIV_BACKEND_LUN].ptr; 1672229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 1673229997Sken 1674229997Sken /* 1675229997Sken * Make sure we only get SCSI I/O. 1676229997Sken */ 1677229997Sken KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type " 1678229997Sken "%#x) encountered", io->io_hdr.io_type)); 1679229997Sken 1680267519Smav PRIV(io)->len = 0; 1681267519Smav 1682267877Smav mtx_lock(&be_lun->queue_lock); 1683229997Sken /* 1684229997Sken * XXX KDM make sure that links is okay to use at this point. 1685229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 1686229997Sken * or deal with resource allocation here. 1687229997Sken */ 1688229997Sken STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1689267877Smav mtx_unlock(&be_lun->queue_lock); 1690229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1691229997Sken 1692267514Smav return (CTL_RETVAL_COMPLETE); 1693229997Sken} 1694229997Sken 1695229997Skenstatic int 1696229997Skenctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 1697229997Sken int flag, struct thread *td) 1698229997Sken{ 1699229997Sken struct ctl_be_block_softc *softc; 1700229997Sken int error; 1701229997Sken 1702229997Sken softc = &backend_block_softc; 1703229997Sken 1704229997Sken error = 0; 1705229997Sken 1706229997Sken switch (cmd) { 1707229997Sken case CTL_LUN_REQ: { 1708229997Sken struct ctl_lun_req *lun_req; 1709229997Sken 1710229997Sken lun_req = (struct ctl_lun_req *)addr; 1711229997Sken 1712229997Sken switch (lun_req->reqtype) { 1713229997Sken case CTL_LUNREQ_CREATE: 1714229997Sken error = ctl_be_block_create(softc, lun_req); 1715229997Sken break; 1716229997Sken case CTL_LUNREQ_RM: 1717229997Sken error = ctl_be_block_rm(softc, lun_req); 1718229997Sken break; 1719232604Strasz case CTL_LUNREQ_MODIFY: 1720232604Strasz error = ctl_be_block_modify(softc, lun_req); 1721232604Strasz break; 1722229997Sken default: 1723229997Sken lun_req->status = CTL_LUN_ERROR; 1724229997Sken snprintf(lun_req->error_str, sizeof(lun_req->error_str), 1725272911Smav "invalid LUN request type %d", 1726229997Sken lun_req->reqtype); 1727229997Sken break; 1728229997Sken } 1729229997Sken break; 1730229997Sken } 1731229997Sken default: 1732229997Sken error = ENOTTY; 1733229997Sken break; 1734229997Sken } 1735229997Sken 1736229997Sken return (error); 1737229997Sken} 1738229997Sken 1739229997Skenstatic int 1740229997Skenctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1741229997Sken{ 1742229997Sken struct ctl_be_block_filedata *file_data; 1743229997Sken struct ctl_lun_create_params *params; 1744275865Smav char *value; 1745229997Sken struct vattr vattr; 1746275865Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1747229997Sken int error; 1748229997Sken 1749229997Sken error = 0; 1750229997Sken file_data = &be_lun->backend.file; 1751272911Smav params = &be_lun->params; 1752229997Sken 1753229997Sken be_lun->dev_type = CTL_BE_BLOCK_FILE; 1754229997Sken be_lun->dispatch = ctl_be_block_dispatch_file; 1755229997Sken be_lun->lun_flush = ctl_be_block_flush_file; 1756275474Smav be_lun->get_lba_status = ctl_be_block_gls_file; 1757275481Smav be_lun->getattr = ctl_be_block_getattr_file; 1758229997Sken 1759229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 1760229997Sken if (error != 0) { 1761229997Sken snprintf(req->error_str, sizeof(req->error_str), 1762229997Sken "error calling VOP_GETATTR() for file %s", 1763229997Sken be_lun->dev_path); 1764229997Sken return (error); 1765229997Sken } 1766229997Sken 1767229997Sken /* 1768229997Sken * Verify that we have the ability to upgrade to exclusive 1769229997Sken * access on this file so we can trap errors at open instead 1770229997Sken * of reporting them during first access. 1771229997Sken */ 1772229997Sken if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) { 1773229997Sken vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY); 1774229997Sken if (be_lun->vn->v_iflag & VI_DOOMED) { 1775229997Sken error = EBADF; 1776229997Sken snprintf(req->error_str, sizeof(req->error_str), 1777229997Sken "error locking file %s", be_lun->dev_path); 1778229997Sken return (error); 1779229997Sken } 1780229997Sken } 1781229997Sken 1782229997Sken 1783229997Sken file_data->cred = crhold(curthread->td_ucred); 1784232604Strasz if (params->lun_size_bytes != 0) 1785232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1786232604Strasz else 1787232604Strasz be_lun->size_bytes = vattr.va_size; 1788229997Sken /* 1789229997Sken * We set the multi thread flag for file operations because all 1790229997Sken * filesystems (in theory) are capable of allowing multiple readers 1791229997Sken * of a file at once. So we want to get the maximum possible 1792229997Sken * concurrency. 1793229997Sken */ 1794229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD; 1795229997Sken 1796229997Sken /* 1797273029Smav * For files we can use any logical block size. Prefer 512 bytes 1798273029Smav * for compatibility reasons. If file's vattr.va_blocksize 1799273029Smav * (preferred I/O block size) is bigger and multiple to chosen 1800273029Smav * logical block size -- report it as physical block size. 1801229997Sken */ 1802229997Sken if (params->blocksize_bytes != 0) 1803229997Sken be_lun->blocksize = params->blocksize_bytes; 1804229997Sken else 1805229997Sken be_lun->blocksize = 512; 1806275865Smav 1807275865Smav us = ps = vattr.va_blocksize; 1808275865Smav uo = po = 0; 1809275865Smav 1810275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1811275865Smav if (value != NULL) 1812275865Smav ctl_expand_number(value, &ps); 1813275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1814275865Smav if (value != NULL) 1815275865Smav ctl_expand_number(value, &po); 1816275865Smav pss = ps / be_lun->blocksize; 1817275865Smav pos = po / be_lun->blocksize; 1818275865Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1819275865Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1820273029Smav be_lun->pblockexp = fls(pss) - 1; 1821275865Smav be_lun->pblockoff = (pss - pos) % pss; 1822273029Smav } 1823229997Sken 1824275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 1825275865Smav if (value != NULL) 1826275865Smav ctl_expand_number(value, &us); 1827275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 1828275865Smav if (value != NULL) 1829275865Smav ctl_expand_number(value, &uo); 1830275865Smav uss = us / be_lun->blocksize; 1831275865Smav uos = uo / be_lun->blocksize; 1832275865Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 1833275865Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 1834275865Smav be_lun->ublockexp = fls(uss) - 1; 1835275865Smav be_lun->ublockoff = (uss - uos) % uss; 1836275865Smav } 1837275865Smav 1838229997Sken /* 1839229997Sken * Sanity check. The media size has to be at least one 1840229997Sken * sector long. 1841229997Sken */ 1842229997Sken if (be_lun->size_bytes < be_lun->blocksize) { 1843229997Sken error = EINVAL; 1844229997Sken snprintf(req->error_str, sizeof(req->error_str), 1845229997Sken "file %s size %ju < block size %u", be_lun->dev_path, 1846229997Sken (uintmax_t)be_lun->size_bytes, be_lun->blocksize); 1847229997Sken } 1848229997Sken return (error); 1849229997Sken} 1850229997Sken 1851229997Skenstatic int 1852229997Skenctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1853229997Sken{ 1854229997Sken struct ctl_lun_create_params *params; 1855229997Sken struct vattr vattr; 1856229997Sken struct cdev *dev; 1857229997Sken struct cdevsw *devsw; 1858275865Smav char *value; 1859229997Sken int error; 1860275865Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1861229997Sken 1862272911Smav params = &be_lun->params; 1863229997Sken 1864229997Sken be_lun->dev_type = CTL_BE_BLOCK_DEV; 1865229997Sken be_lun->backend.dev.cdev = be_lun->vn->v_rdev; 1866229997Sken be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev, 1867229997Sken &be_lun->backend.dev.dev_ref); 1868229997Sken if (be_lun->backend.dev.csw == NULL) 1869229997Sken panic("Unable to retrieve device switch"); 1870275474Smav if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) { 1871269123Smav be_lun->dispatch = ctl_be_block_dispatch_zvol; 1872275474Smav be_lun->get_lba_status = ctl_be_block_gls_zvol; 1873275474Smav } else 1874269123Smav be_lun->dispatch = ctl_be_block_dispatch_dev; 1875269123Smav be_lun->lun_flush = ctl_be_block_flush_dev; 1876269123Smav be_lun->unmap = ctl_be_block_unmap_dev; 1877274154Smav be_lun->getattr = ctl_be_block_getattr_dev; 1878229997Sken 1879229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED); 1880229997Sken if (error) { 1881229997Sken snprintf(req->error_str, sizeof(req->error_str), 1882272911Smav "error getting vnode attributes for device %s", 1883272911Smav be_lun->dev_path); 1884229997Sken return (error); 1885229997Sken } 1886229997Sken 1887229997Sken dev = be_lun->vn->v_rdev; 1888229997Sken devsw = dev->si_devsw; 1889229997Sken if (!devsw->d_ioctl) { 1890229997Sken snprintf(req->error_str, sizeof(req->error_str), 1891272911Smav "no d_ioctl for device %s!", 1892229997Sken be_lun->dev_path); 1893229997Sken return (ENODEV); 1894229997Sken } 1895229997Sken 1896229997Sken error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, 1897229997Sken (caddr_t)&be_lun->blocksize, FREAD, 1898229997Sken curthread); 1899229997Sken if (error) { 1900229997Sken snprintf(req->error_str, sizeof(req->error_str), 1901272911Smav "error %d returned for DIOCGSECTORSIZE ioctl " 1902272911Smav "on %s!", error, be_lun->dev_path); 1903229997Sken return (error); 1904229997Sken } 1905229997Sken 1906229997Sken /* 1907229997Sken * If the user has asked for a blocksize that is greater than the 1908229997Sken * backing device's blocksize, we can do it only if the blocksize 1909229997Sken * the user is asking for is an even multiple of the underlying 1910229997Sken * device's blocksize. 1911229997Sken */ 1912229997Sken if ((params->blocksize_bytes != 0) 1913229997Sken && (params->blocksize_bytes > be_lun->blocksize)) { 1914229997Sken uint32_t bs_multiple, tmp_blocksize; 1915229997Sken 1916229997Sken bs_multiple = params->blocksize_bytes / be_lun->blocksize; 1917229997Sken 1918229997Sken tmp_blocksize = bs_multiple * be_lun->blocksize; 1919229997Sken 1920229997Sken if (tmp_blocksize == params->blocksize_bytes) { 1921229997Sken be_lun->blocksize = params->blocksize_bytes; 1922229997Sken } else { 1923229997Sken snprintf(req->error_str, sizeof(req->error_str), 1924272911Smav "requested blocksize %u is not an even " 1925229997Sken "multiple of backing device blocksize %u", 1926272911Smav params->blocksize_bytes, 1927229997Sken be_lun->blocksize); 1928229997Sken return (EINVAL); 1929229997Sken 1930229997Sken } 1931229997Sken } else if ((params->blocksize_bytes != 0) 1932229997Sken && (params->blocksize_bytes != be_lun->blocksize)) { 1933229997Sken snprintf(req->error_str, sizeof(req->error_str), 1934272911Smav "requested blocksize %u < backing device " 1935272911Smav "blocksize %u", params->blocksize_bytes, 1936229997Sken be_lun->blocksize); 1937229997Sken return (EINVAL); 1938229997Sken } 1939229997Sken 1940229997Sken error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 1941229997Sken (caddr_t)&be_lun->size_bytes, FREAD, 1942229997Sken curthread); 1943229997Sken if (error) { 1944229997Sken snprintf(req->error_str, sizeof(req->error_str), 1945272911Smav "error %d returned for DIOCGMEDIASIZE " 1946272911Smav " ioctl on %s!", error, 1947232604Strasz be_lun->dev_path); 1948229997Sken return (error); 1949229997Sken } 1950229997Sken 1951232604Strasz if (params->lun_size_bytes != 0) { 1952232604Strasz if (params->lun_size_bytes > be_lun->size_bytes) { 1953232604Strasz snprintf(req->error_str, sizeof(req->error_str), 1954272911Smav "requested LUN size %ju > backing device " 1955272911Smav "size %ju", 1956232604Strasz (uintmax_t)params->lun_size_bytes, 1957232604Strasz (uintmax_t)be_lun->size_bytes); 1958232604Strasz return (EINVAL); 1959232604Strasz } 1960232604Strasz 1961232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1962232604Strasz } 1963232604Strasz 1964264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE, 1965264191Smav (caddr_t)&ps, FREAD, curthread); 1966264191Smav if (error) 1967264191Smav ps = po = 0; 1968264191Smav else { 1969264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET, 1970264191Smav (caddr_t)&po, FREAD, curthread); 1971264191Smav if (error) 1972264191Smav po = 0; 1973264191Smav } 1974275865Smav us = ps; 1975275865Smav uo = po; 1976275865Smav 1977275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1978275865Smav if (value != NULL) 1979275865Smav ctl_expand_number(value, &ps); 1980275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1981275865Smav if (value != NULL) 1982275865Smav ctl_expand_number(value, &po); 1983264191Smav pss = ps / be_lun->blocksize; 1984264191Smav pos = po / be_lun->blocksize; 1985264191Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1986264191Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1987264191Smav be_lun->pblockexp = fls(pss) - 1; 1988264191Smav be_lun->pblockoff = (pss - pos) % pss; 1989264191Smav } 1990264191Smav 1991275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 1992275865Smav if (value != NULL) 1993275865Smav ctl_expand_number(value, &us); 1994275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 1995275865Smav if (value != NULL) 1996275865Smav ctl_expand_number(value, &uo); 1997275865Smav uss = us / be_lun->blocksize; 1998275865Smav uos = uo / be_lun->blocksize; 1999275865Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 2000275865Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 2001275865Smav be_lun->ublockexp = fls(uss) - 1; 2002275865Smav be_lun->ublockoff = (uss - uos) % uss; 2003275865Smav } 2004275865Smav 2005229997Sken return (0); 2006229997Sken} 2007229997Sken 2008229997Skenstatic int 2009229997Skenctl_be_block_close(struct ctl_be_block_lun *be_lun) 2010229997Sken{ 2011229997Sken DROP_GIANT(); 2012229997Sken if (be_lun->vn) { 2013229997Sken int flags = FREAD | FWRITE; 2014229997Sken 2015229997Sken switch (be_lun->dev_type) { 2016229997Sken case CTL_BE_BLOCK_DEV: 2017229997Sken if (be_lun->backend.dev.csw) { 2018229997Sken dev_relthread(be_lun->backend.dev.cdev, 2019229997Sken be_lun->backend.dev.dev_ref); 2020229997Sken be_lun->backend.dev.csw = NULL; 2021229997Sken be_lun->backend.dev.cdev = NULL; 2022229997Sken } 2023229997Sken break; 2024229997Sken case CTL_BE_BLOCK_FILE: 2025229997Sken break; 2026229997Sken case CTL_BE_BLOCK_NONE: 2027258871Strasz break; 2028229997Sken default: 2029229997Sken panic("Unexpected backend type."); 2030229997Sken break; 2031229997Sken } 2032229997Sken 2033229997Sken (void)vn_close(be_lun->vn, flags, NOCRED, curthread); 2034229997Sken be_lun->vn = NULL; 2035229997Sken 2036229997Sken switch (be_lun->dev_type) { 2037229997Sken case CTL_BE_BLOCK_DEV: 2038229997Sken break; 2039229997Sken case CTL_BE_BLOCK_FILE: 2040229997Sken if (be_lun->backend.file.cred != NULL) { 2041229997Sken crfree(be_lun->backend.file.cred); 2042229997Sken be_lun->backend.file.cred = NULL; 2043229997Sken } 2044229997Sken break; 2045229997Sken case CTL_BE_BLOCK_NONE: 2046258871Strasz break; 2047229997Sken default: 2048229997Sken panic("Unexpected backend type."); 2049229997Sken break; 2050229997Sken } 2051272911Smav be_lun->dev_type = CTL_BE_BLOCK_NONE; 2052229997Sken } 2053229997Sken PICKUP_GIANT(); 2054229997Sken 2055229997Sken return (0); 2056229997Sken} 2057229997Sken 2058229997Skenstatic int 2059229997Skenctl_be_block_open(struct ctl_be_block_softc *softc, 2060229997Sken struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 2061229997Sken{ 2062229997Sken struct nameidata nd; 2063229997Sken int flags; 2064229997Sken int error; 2065229997Sken 2066229997Sken /* 2067229997Sken * XXX KDM allow a read-only option? 2068229997Sken */ 2069229997Sken flags = FREAD | FWRITE; 2070229997Sken error = 0; 2071229997Sken 2072229997Sken if (rootvnode == NULL) { 2073229997Sken snprintf(req->error_str, sizeof(req->error_str), 2074272911Smav "Root filesystem is not mounted"); 2075229997Sken return (1); 2076229997Sken } 2077229997Sken 2078229997Sken if (!curthread->td_proc->p_fd->fd_cdir) { 2079229997Sken curthread->td_proc->p_fd->fd_cdir = rootvnode; 2080229997Sken VREF(rootvnode); 2081229997Sken } 2082229997Sken if (!curthread->td_proc->p_fd->fd_rdir) { 2083229997Sken curthread->td_proc->p_fd->fd_rdir = rootvnode; 2084229997Sken VREF(rootvnode); 2085229997Sken } 2086229997Sken if (!curthread->td_proc->p_fd->fd_jdir) { 2087229997Sken curthread->td_proc->p_fd->fd_jdir = rootvnode; 2088229997Sken VREF(rootvnode); 2089229997Sken } 2090229997Sken 2091229997Sken again: 2092229997Sken NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread); 2093229997Sken error = vn_open(&nd, &flags, 0, NULL); 2094229997Sken if (error) { 2095229997Sken /* 2096229997Sken * This is the only reasonable guess we can make as far as 2097229997Sken * path if the user doesn't give us a fully qualified path. 2098229997Sken * If they want to specify a file, they need to specify the 2099229997Sken * full path. 2100229997Sken */ 2101229997Sken if (be_lun->dev_path[0] != '/') { 2102229997Sken char *dev_path = "/dev/"; 2103229997Sken char *dev_name; 2104229997Sken 2105229997Sken /* Try adding device path at beginning of name */ 2106229997Sken dev_name = malloc(strlen(be_lun->dev_path) 2107229997Sken + strlen(dev_path) + 1, 2108229997Sken M_CTLBLK, M_WAITOK); 2109229997Sken if (dev_name) { 2110229997Sken sprintf(dev_name, "%s%s", dev_path, 2111229997Sken be_lun->dev_path); 2112229997Sken free(be_lun->dev_path, M_CTLBLK); 2113229997Sken be_lun->dev_path = dev_name; 2114229997Sken goto again; 2115229997Sken } 2116229997Sken } 2117229997Sken snprintf(req->error_str, sizeof(req->error_str), 2118272911Smav "error opening %s: %d", be_lun->dev_path, error); 2119229997Sken return (error); 2120229997Sken } 2121229997Sken 2122229997Sken NDFREE(&nd, NDF_ONLY_PNBUF); 2123229997Sken 2124229997Sken be_lun->vn = nd.ni_vp; 2125229997Sken 2126229997Sken /* We only support disks and files. */ 2127229997Sken if (vn_isdisk(be_lun->vn, &error)) { 2128229997Sken error = ctl_be_block_open_dev(be_lun, req); 2129229997Sken } else if (be_lun->vn->v_type == VREG) { 2130229997Sken error = ctl_be_block_open_file(be_lun, req); 2131229997Sken } else { 2132229997Sken error = EINVAL; 2133229997Sken snprintf(req->error_str, sizeof(req->error_str), 2134258871Strasz "%s is not a disk or plain file", be_lun->dev_path); 2135229997Sken } 2136229997Sken VOP_UNLOCK(be_lun->vn, 0); 2137229997Sken 2138229997Sken if (error != 0) { 2139229997Sken ctl_be_block_close(be_lun); 2140229997Sken return (error); 2141229997Sken } 2142229997Sken 2143229997Sken be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2144229997Sken be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 2145229997Sken 2146229997Sken return (0); 2147229997Sken} 2148229997Sken 2149229997Skenstatic int 2150229997Skenctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2151229997Sken{ 2152229997Sken struct ctl_be_block_lun *be_lun; 2153229997Sken struct ctl_lun_create_params *params; 2154267481Smav char num_thread_str[16]; 2155229997Sken char tmpstr[32]; 2156267481Smav char *value; 2157264274Smav int retval, num_threads, unmap; 2158267481Smav int tmp_num_threads; 2159229997Sken 2160229997Sken params = &req->reqdata.create; 2161229997Sken retval = 0; 2162272911Smav req->status = CTL_LUN_OK; 2163229997Sken 2164229997Sken num_threads = cbb_num_threads; 2165229997Sken 2166229997Sken be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK); 2167229997Sken 2168272911Smav be_lun->params = req->reqdata.create; 2169229997Sken be_lun->softc = softc; 2170229997Sken STAILQ_INIT(&be_lun->input_queue); 2171275474Smav STAILQ_INIT(&be_lun->config_read_queue); 2172229997Sken STAILQ_INIT(&be_lun->config_write_queue); 2173229997Sken STAILQ_INIT(&be_lun->datamove_queue); 2174229997Sken sprintf(be_lun->lunname, "cblk%d", softc->num_luns); 2175267877Smav mtx_init(&be_lun->io_lock, "cblk io lock", NULL, MTX_DEF); 2176267877Smav mtx_init(&be_lun->queue_lock, "cblk queue lock", NULL, MTX_DEF); 2177268280Smav ctl_init_opts(&be_lun->ctl_be_lun.options, 2178268280Smav req->num_be_args, req->kern_be_args); 2179229997Sken 2180264886Smav be_lun->lun_zone = uma_zcreate(be_lun->lunname, CTLBLK_MAX_SEG, 2181256995Smav NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0); 2182229997Sken 2183229997Sken if (be_lun->lun_zone == NULL) { 2184229997Sken snprintf(req->error_str, sizeof(req->error_str), 2185272911Smav "error allocating UMA zone"); 2186229997Sken goto bailout_error; 2187229997Sken } 2188229997Sken 2189229997Sken if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 2190229997Sken be_lun->ctl_be_lun.lun_type = params->device_type; 2191229997Sken else 2192229997Sken be_lun->ctl_be_lun.lun_type = T_DIRECT; 2193229997Sken 2194229997Sken if (be_lun->ctl_be_lun.lun_type == T_DIRECT) { 2195268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "file"); 2196267499Smav if (value == NULL) { 2197229997Sken snprintf(req->error_str, sizeof(req->error_str), 2198272911Smav "no file argument specified"); 2199229997Sken goto bailout_error; 2200229997Sken } 2201267499Smav be_lun->dev_path = strdup(value, M_CTLBLK); 2202272911Smav be_lun->blocksize = 512; 2203272911Smav be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2204229997Sken 2205229997Sken retval = ctl_be_block_open(softc, be_lun, req); 2206229997Sken if (retval != 0) { 2207229997Sken retval = 0; 2208272911Smav req->status = CTL_LUN_WARNING; 2209229997Sken } 2210229997Sken } else { 2211229997Sken /* 2212229997Sken * For processor devices, we don't have any size. 2213229997Sken */ 2214229997Sken be_lun->blocksize = 0; 2215264191Smav be_lun->pblockexp = 0; 2216264191Smav be_lun->pblockoff = 0; 2217275865Smav be_lun->ublockexp = 0; 2218275865Smav be_lun->ublockoff = 0; 2219229997Sken be_lun->size_blocks = 0; 2220229997Sken be_lun->size_bytes = 0; 2221229997Sken be_lun->ctl_be_lun.maxlba = 0; 2222229997Sken 2223229997Sken /* 2224229997Sken * Default to just 1 thread for processor devices. 2225229997Sken */ 2226229997Sken num_threads = 1; 2227229997Sken } 2228229997Sken 2229229997Sken /* 2230229997Sken * XXX This searching loop might be refactored to be combined with 2231229997Sken * the loop above, 2232229997Sken */ 2233268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "num_threads"); 2234267481Smav if (value != NULL) { 2235267481Smav tmp_num_threads = strtol(value, NULL, 0); 2236229997Sken 2237267481Smav /* 2238267481Smav * We don't let the user specify less than one 2239267481Smav * thread, but hope he's clueful enough not to 2240267481Smav * specify 1000 threads. 2241267481Smav */ 2242267481Smav if (tmp_num_threads < 1) { 2243267481Smav snprintf(req->error_str, sizeof(req->error_str), 2244272911Smav "invalid number of threads %s", 2245272911Smav num_thread_str); 2246267481Smav goto bailout_error; 2247229997Sken } 2248267481Smav num_threads = tmp_num_threads; 2249229997Sken } 2250274154Smav unmap = (be_lun->dispatch == ctl_be_block_dispatch_zvol); 2251268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "unmap"); 2252274154Smav if (value != NULL) 2253274154Smav unmap = (strcmp(value, "on") == 0); 2254229997Sken 2255229997Sken be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED; 2256229997Sken be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY; 2257272911Smav if (be_lun->vn == NULL) 2258272911Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_OFFLINE; 2259264274Smav if (unmap) 2260264274Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 2261275568Smav if (be_lun->dispatch != ctl_be_block_dispatch_dev) 2262275568Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_SERSEQ_READ; 2263229997Sken be_lun->ctl_be_lun.be_lun = be_lun; 2264272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2265272911Smav 0 : (be_lun->size_blocks - 1); 2266229997Sken be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2267264191Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2268264191Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2269275865Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2270275865Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2271272911Smav if (be_lun->dispatch == ctl_be_block_dispatch_zvol && 2272272911Smav be_lun->blocksize != 0) 2273272911Smav be_lun->ctl_be_lun.atomicblock = CTLBLK_MAX_IO_SIZE / 2274272911Smav be_lun->blocksize; 2275229997Sken /* Tell the user the blocksize we ended up using */ 2276272911Smav params->lun_size_bytes = be_lun->size_bytes; 2277229997Sken params->blocksize_bytes = be_lun->blocksize; 2278229997Sken if (params->flags & CTL_LUN_FLAG_ID_REQ) { 2279229997Sken be_lun->ctl_be_lun.req_lun_id = params->req_lun_id; 2280229997Sken be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ; 2281229997Sken } else 2282229997Sken be_lun->ctl_be_lun.req_lun_id = 0; 2283229997Sken 2284229997Sken be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown; 2285229997Sken be_lun->ctl_be_lun.lun_config_status = 2286229997Sken ctl_be_block_lun_config_status; 2287229997Sken be_lun->ctl_be_lun.be = &ctl_be_block_driver; 2288229997Sken 2289229997Sken if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 2290229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d", 2291229997Sken softc->num_luns); 2292229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr, 2293229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.serial_num), 2294229997Sken sizeof(tmpstr))); 2295229997Sken 2296229997Sken /* Tell the user what we used for a serial number */ 2297229997Sken strncpy((char *)params->serial_num, tmpstr, 2298229997Sken ctl_min(sizeof(params->serial_num), sizeof(tmpstr))); 2299229997Sken } else { 2300229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, 2301229997Sken params->serial_num, 2302229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.serial_num), 2303229997Sken sizeof(params->serial_num))); 2304229997Sken } 2305229997Sken if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 2306229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns); 2307229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr, 2308229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.device_id), 2309229997Sken sizeof(tmpstr))); 2310229997Sken 2311229997Sken /* Tell the user what we used for a device ID */ 2312229997Sken strncpy((char *)params->device_id, tmpstr, 2313229997Sken ctl_min(sizeof(params->device_id), sizeof(tmpstr))); 2314229997Sken } else { 2315229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, 2316229997Sken params->device_id, 2317229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.device_id), 2318229997Sken sizeof(params->device_id))); 2319229997Sken } 2320229997Sken 2321229997Sken TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun); 2322229997Sken 2323229997Sken be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK, 2324229997Sken taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 2325229997Sken 2326229997Sken if (be_lun->io_taskqueue == NULL) { 2327229997Sken snprintf(req->error_str, sizeof(req->error_str), 2328272911Smav "unable to create taskqueue"); 2329229997Sken goto bailout_error; 2330229997Sken } 2331229997Sken 2332229997Sken /* 2333229997Sken * Note that we start the same number of threads by default for 2334229997Sken * both the file case and the block device case. For the file 2335229997Sken * case, we need multiple threads to allow concurrency, because the 2336229997Sken * vnode interface is designed to be a blocking interface. For the 2337229997Sken * block device case, ZFS zvols at least will block the caller's 2338229997Sken * context in many instances, and so we need multiple threads to 2339229997Sken * overcome that problem. Other block devices don't need as many 2340229997Sken * threads, but they shouldn't cause too many problems. 2341229997Sken * 2342229997Sken * If the user wants to just have a single thread for a block 2343229997Sken * device, he can specify that when the LUN is created, or change 2344229997Sken * the tunable/sysctl to alter the default number of threads. 2345229997Sken */ 2346229997Sken retval = taskqueue_start_threads(&be_lun->io_taskqueue, 2347229997Sken /*num threads*/num_threads, 2348229997Sken /*priority*/PWAIT, 2349229997Sken /*thread name*/ 2350229997Sken "%s taskq", be_lun->lunname); 2351229997Sken 2352229997Sken if (retval != 0) 2353229997Sken goto bailout_error; 2354229997Sken 2355229997Sken be_lun->num_threads = num_threads; 2356229997Sken 2357229997Sken mtx_lock(&softc->lock); 2358229997Sken softc->num_luns++; 2359229997Sken STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links); 2360229997Sken 2361229997Sken mtx_unlock(&softc->lock); 2362229997Sken 2363229997Sken retval = ctl_add_lun(&be_lun->ctl_be_lun); 2364229997Sken if (retval != 0) { 2365229997Sken mtx_lock(&softc->lock); 2366229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2367229997Sken links); 2368229997Sken softc->num_luns--; 2369229997Sken mtx_unlock(&softc->lock); 2370229997Sken snprintf(req->error_str, sizeof(req->error_str), 2371272911Smav "ctl_add_lun() returned error %d, see dmesg for " 2372272911Smav "details", retval); 2373229997Sken retval = 0; 2374229997Sken goto bailout_error; 2375229997Sken } 2376229997Sken 2377229997Sken mtx_lock(&softc->lock); 2378229997Sken 2379229997Sken /* 2380229997Sken * Tell the config_status routine that we're waiting so it won't 2381229997Sken * clean up the LUN in the event of an error. 2382229997Sken */ 2383229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2384229997Sken 2385229997Sken while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) { 2386229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2387229997Sken if (retval == EINTR) 2388229997Sken break; 2389229997Sken } 2390229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2391229997Sken 2392229997Sken if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) { 2393229997Sken snprintf(req->error_str, sizeof(req->error_str), 2394272911Smav "LUN configuration error, see dmesg for details"); 2395229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2396229997Sken links); 2397229997Sken softc->num_luns--; 2398229997Sken mtx_unlock(&softc->lock); 2399229997Sken goto bailout_error; 2400229997Sken } else { 2401229997Sken params->req_lun_id = be_lun->ctl_be_lun.lun_id; 2402229997Sken } 2403229997Sken 2404229997Sken mtx_unlock(&softc->lock); 2405229997Sken 2406229997Sken be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id, 2407229997Sken be_lun->blocksize, 2408229997Sken DEVSTAT_ALL_SUPPORTED, 2409229997Sken be_lun->ctl_be_lun.lun_type 2410229997Sken | DEVSTAT_TYPE_IF_OTHER, 2411229997Sken DEVSTAT_PRIORITY_OTHER); 2412229997Sken 2413229997Sken return (retval); 2414229997Sken 2415229997Skenbailout_error: 2416229997Sken req->status = CTL_LUN_ERROR; 2417229997Sken 2418267429Smav if (be_lun->io_taskqueue != NULL) 2419267429Smav taskqueue_free(be_lun->io_taskqueue); 2420229997Sken ctl_be_block_close(be_lun); 2421267429Smav if (be_lun->dev_path != NULL) 2422267429Smav free(be_lun->dev_path, M_CTLBLK); 2423267429Smav if (be_lun->lun_zone != NULL) 2424267429Smav uma_zdestroy(be_lun->lun_zone); 2425268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2426267877Smav mtx_destroy(&be_lun->queue_lock); 2427267877Smav mtx_destroy(&be_lun->io_lock); 2428229997Sken free(be_lun, M_CTLBLK); 2429229997Sken 2430229997Sken return (retval); 2431229997Sken} 2432229997Sken 2433229997Skenstatic int 2434229997Skenctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2435229997Sken{ 2436229997Sken struct ctl_lun_rm_params *params; 2437229997Sken struct ctl_be_block_lun *be_lun; 2438229997Sken int retval; 2439229997Sken 2440229997Sken params = &req->reqdata.rm; 2441229997Sken 2442229997Sken mtx_lock(&softc->lock); 2443229997Sken 2444229997Sken be_lun = NULL; 2445229997Sken 2446229997Sken STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2447229997Sken if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2448229997Sken break; 2449229997Sken } 2450229997Sken mtx_unlock(&softc->lock); 2451229997Sken 2452229997Sken if (be_lun == NULL) { 2453229997Sken snprintf(req->error_str, sizeof(req->error_str), 2454272911Smav "LUN %u is not managed by the block backend", 2455272911Smav params->lun_id); 2456229997Sken goto bailout_error; 2457229997Sken } 2458229997Sken 2459229997Sken retval = ctl_disable_lun(&be_lun->ctl_be_lun); 2460229997Sken 2461229997Sken if (retval != 0) { 2462229997Sken snprintf(req->error_str, sizeof(req->error_str), 2463272911Smav "error %d returned from ctl_disable_lun() for " 2464272911Smav "LUN %d", retval, params->lun_id); 2465229997Sken goto bailout_error; 2466229997Sken 2467229997Sken } 2468229997Sken 2469229997Sken retval = ctl_invalidate_lun(&be_lun->ctl_be_lun); 2470229997Sken if (retval != 0) { 2471229997Sken snprintf(req->error_str, sizeof(req->error_str), 2472272911Smav "error %d returned from ctl_invalidate_lun() for " 2473272911Smav "LUN %d", retval, params->lun_id); 2474229997Sken goto bailout_error; 2475229997Sken } 2476229997Sken 2477229997Sken mtx_lock(&softc->lock); 2478229997Sken 2479229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2480229997Sken 2481229997Sken while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2482229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2483229997Sken if (retval == EINTR) 2484229997Sken break; 2485229997Sken } 2486229997Sken 2487229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2488229997Sken 2489229997Sken if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2490229997Sken snprintf(req->error_str, sizeof(req->error_str), 2491272911Smav "interrupted waiting for LUN to be freed"); 2492229997Sken mtx_unlock(&softc->lock); 2493229997Sken goto bailout_error; 2494229997Sken } 2495229997Sken 2496229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links); 2497229997Sken 2498229997Sken softc->num_luns--; 2499229997Sken mtx_unlock(&softc->lock); 2500229997Sken 2501229997Sken taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task); 2502229997Sken 2503229997Sken taskqueue_free(be_lun->io_taskqueue); 2504229997Sken 2505229997Sken ctl_be_block_close(be_lun); 2506229997Sken 2507229997Sken if (be_lun->disk_stats != NULL) 2508229997Sken devstat_remove_entry(be_lun->disk_stats); 2509229997Sken 2510229997Sken uma_zdestroy(be_lun->lun_zone); 2511229997Sken 2512268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2513229997Sken free(be_lun->dev_path, M_CTLBLK); 2514267877Smav mtx_destroy(&be_lun->queue_lock); 2515267877Smav mtx_destroy(&be_lun->io_lock); 2516229997Sken free(be_lun, M_CTLBLK); 2517229997Sken 2518229997Sken req->status = CTL_LUN_OK; 2519229997Sken 2520229997Sken return (0); 2521229997Sken 2522229997Skenbailout_error: 2523229997Sken 2524229997Sken req->status = CTL_LUN_ERROR; 2525229997Sken 2526229997Sken return (0); 2527229997Sken} 2528229997Sken 2529232604Straszstatic int 2530232604Straszctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 2531232604Strasz struct ctl_lun_req *req) 2532232604Strasz{ 2533232604Strasz struct vattr vattr; 2534232604Strasz int error; 2535272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2536232604Strasz 2537232604Strasz if (params->lun_size_bytes != 0) { 2538232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2539232604Strasz } else { 2540271794Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 2541232604Strasz error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 2542271794Smav VOP_UNLOCK(be_lun->vn, 0); 2543232604Strasz if (error != 0) { 2544232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2545232604Strasz "error calling VOP_GETATTR() for file %s", 2546232604Strasz be_lun->dev_path); 2547232604Strasz return (error); 2548232604Strasz } 2549232604Strasz 2550232604Strasz be_lun->size_bytes = vattr.va_size; 2551232604Strasz } 2552232604Strasz 2553232604Strasz return (0); 2554232604Strasz} 2555232604Strasz 2556232604Straszstatic int 2557232604Straszctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 2558232604Strasz struct ctl_lun_req *req) 2559232604Strasz{ 2560271794Smav struct ctl_be_block_devdata *dev_data; 2561232604Strasz int error; 2562272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2563232604Strasz uint64_t size_bytes; 2564232604Strasz 2565271794Smav dev_data = &be_lun->backend.dev; 2566271794Smav if (!dev_data->csw->d_ioctl) { 2567232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2568272911Smav "no d_ioctl for device %s!", be_lun->dev_path); 2569232604Strasz return (ENODEV); 2570232604Strasz } 2571232604Strasz 2572271794Smav error = dev_data->csw->d_ioctl(dev_data->cdev, DIOCGMEDIASIZE, 2573232604Strasz (caddr_t)&size_bytes, FREAD, 2574232604Strasz curthread); 2575232604Strasz if (error) { 2576232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2577272911Smav "error %d returned for DIOCGMEDIASIZE ioctl " 2578272911Smav "on %s!", error, be_lun->dev_path); 2579232604Strasz return (error); 2580232604Strasz } 2581232604Strasz 2582232604Strasz if (params->lun_size_bytes != 0) { 2583232604Strasz if (params->lun_size_bytes > size_bytes) { 2584232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2585272911Smav "requested LUN size %ju > backing device " 2586272911Smav "size %ju", 2587232604Strasz (uintmax_t)params->lun_size_bytes, 2588232604Strasz (uintmax_t)size_bytes); 2589232604Strasz return (EINVAL); 2590232604Strasz } 2591232604Strasz 2592232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2593232604Strasz } else { 2594232604Strasz be_lun->size_bytes = size_bytes; 2595232604Strasz } 2596232604Strasz 2597232604Strasz return (0); 2598232604Strasz} 2599232604Strasz 2600232604Straszstatic int 2601232604Straszctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2602232604Strasz{ 2603232604Strasz struct ctl_lun_modify_params *params; 2604232604Strasz struct ctl_be_block_lun *be_lun; 2605271794Smav uint64_t oldsize; 2606241896Skib int error; 2607232604Strasz 2608232604Strasz params = &req->reqdata.modify; 2609232604Strasz 2610232604Strasz mtx_lock(&softc->lock); 2611232604Strasz be_lun = NULL; 2612232604Strasz STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2613232604Strasz if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2614232604Strasz break; 2615232604Strasz } 2616232604Strasz mtx_unlock(&softc->lock); 2617232604Strasz 2618232604Strasz if (be_lun == NULL) { 2619232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2620272911Smav "LUN %u is not managed by the block backend", 2621272911Smav params->lun_id); 2622232604Strasz goto bailout_error; 2623232604Strasz } 2624232604Strasz 2625272911Smav be_lun->params.lun_size_bytes = params->lun_size_bytes; 2626232604Strasz 2627274253Smav oldsize = be_lun->size_bytes; 2628272911Smav if (be_lun->vn == NULL) 2629272911Smav error = ctl_be_block_open(softc, be_lun, req); 2630272911Smav else if (be_lun->vn->v_type == VREG) 2631232604Strasz error = ctl_be_block_modify_file(be_lun, req); 2632232604Strasz else 2633232604Strasz error = ctl_be_block_modify_dev(be_lun, req); 2634232604Strasz 2635274253Smav if (error == 0 && be_lun->size_bytes != oldsize) { 2636271794Smav be_lun->size_blocks = be_lun->size_bytes >> 2637271794Smav be_lun->blocksize_shift; 2638232604Strasz 2639271794Smav /* 2640271794Smav * The maximum LBA is the size - 1. 2641271794Smav * 2642271794Smav * XXX: Note that this field is being updated without locking, 2643271794Smav * which might cause problems on 32-bit architectures. 2644271794Smav */ 2645272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2646272911Smav 0 : (be_lun->size_blocks - 1); 2647272911Smav be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2648272911Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2649272911Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2650275865Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2651275865Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2652272911Smav if (be_lun->dispatch == ctl_be_block_dispatch_zvol && 2653272911Smav be_lun->blocksize != 0) 2654272911Smav be_lun->ctl_be_lun.atomicblock = CTLBLK_MAX_IO_SIZE / 2655272911Smav be_lun->blocksize; 2656271794Smav ctl_lun_capacity_changed(&be_lun->ctl_be_lun); 2657272911Smav if (oldsize == 0 && be_lun->size_blocks != 0) 2658272911Smav ctl_lun_online(&be_lun->ctl_be_lun); 2659271794Smav } 2660232604Strasz 2661232604Strasz /* Tell the user the exact size we ended up using */ 2662232604Strasz params->lun_size_bytes = be_lun->size_bytes; 2663232604Strasz 2664272911Smav req->status = error ? CTL_LUN_WARNING : CTL_LUN_OK; 2665232604Strasz 2666232604Strasz return (0); 2667232604Strasz 2668232604Straszbailout_error: 2669232604Strasz req->status = CTL_LUN_ERROR; 2670232604Strasz 2671232604Strasz return (0); 2672232604Strasz} 2673232604Strasz 2674229997Skenstatic void 2675229997Skenctl_be_block_lun_shutdown(void *be_lun) 2676229997Sken{ 2677229997Sken struct ctl_be_block_lun *lun; 2678229997Sken struct ctl_be_block_softc *softc; 2679229997Sken 2680229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2681229997Sken 2682229997Sken softc = lun->softc; 2683229997Sken 2684229997Sken mtx_lock(&softc->lock); 2685229997Sken lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED; 2686229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2687229997Sken wakeup(lun); 2688229997Sken mtx_unlock(&softc->lock); 2689229997Sken 2690229997Sken} 2691229997Sken 2692229997Skenstatic void 2693229997Skenctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status) 2694229997Sken{ 2695229997Sken struct ctl_be_block_lun *lun; 2696229997Sken struct ctl_be_block_softc *softc; 2697229997Sken 2698229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2699229997Sken softc = lun->softc; 2700229997Sken 2701229997Sken if (status == CTL_LUN_CONFIG_OK) { 2702229997Sken mtx_lock(&softc->lock); 2703229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2704229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2705229997Sken wakeup(lun); 2706229997Sken mtx_unlock(&softc->lock); 2707229997Sken 2708229997Sken /* 2709229997Sken * We successfully added the LUN, attempt to enable it. 2710229997Sken */ 2711229997Sken if (ctl_enable_lun(&lun->ctl_be_lun) != 0) { 2712229997Sken printf("%s: ctl_enable_lun() failed!\n", __func__); 2713229997Sken if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) { 2714229997Sken printf("%s: ctl_invalidate_lun() failed!\n", 2715229997Sken __func__); 2716229997Sken } 2717229997Sken } 2718229997Sken 2719229997Sken return; 2720229997Sken } 2721229997Sken 2722229997Sken 2723229997Sken mtx_lock(&softc->lock); 2724229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2725229997Sken lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR; 2726229997Sken wakeup(lun); 2727229997Sken mtx_unlock(&softc->lock); 2728229997Sken} 2729229997Sken 2730229997Sken 2731229997Skenstatic int 2732229997Skenctl_be_block_config_write(union ctl_io *io) 2733229997Sken{ 2734229997Sken struct ctl_be_block_lun *be_lun; 2735229997Sken struct ctl_be_lun *ctl_be_lun; 2736229997Sken int retval; 2737229997Sken 2738229997Sken retval = 0; 2739229997Sken 2740229997Sken DPRINTF("entered\n"); 2741229997Sken 2742229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2743229997Sken CTL_PRIV_BACKEND_LUN].ptr; 2744229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2745229997Sken 2746229997Sken switch (io->scsiio.cdb[0]) { 2747229997Sken case SYNCHRONIZE_CACHE: 2748229997Sken case SYNCHRONIZE_CACHE_16: 2749264274Smav case WRITE_SAME_10: 2750264274Smav case WRITE_SAME_16: 2751264274Smav case UNMAP: 2752229997Sken /* 2753229997Sken * The upper level CTL code will filter out any CDBs with 2754229997Sken * the immediate bit set and return the proper error. 2755229997Sken * 2756229997Sken * We don't really need to worry about what LBA range the 2757229997Sken * user asked to be synced out. When they issue a sync 2758229997Sken * cache command, we'll sync out the whole thing. 2759229997Sken */ 2760267877Smav mtx_lock(&be_lun->queue_lock); 2761229997Sken STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr, 2762229997Sken links); 2763267877Smav mtx_unlock(&be_lun->queue_lock); 2764229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 2765229997Sken break; 2766229997Sken case START_STOP_UNIT: { 2767229997Sken struct scsi_start_stop_unit *cdb; 2768229997Sken 2769229997Sken cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 2770229997Sken 2771229997Sken if (cdb->how & SSS_START) 2772229997Sken retval = ctl_start_lun(ctl_be_lun); 2773229997Sken else { 2774229997Sken retval = ctl_stop_lun(ctl_be_lun); 2775229997Sken /* 2776229997Sken * XXX KDM Copan-specific offline behavior. 2777229997Sken * Figure out a reasonable way to port this? 2778229997Sken */ 2779229997Sken#ifdef NEEDTOPORT 2780229997Sken if ((retval == 0) 2781229997Sken && (cdb->byte2 & SSS_ONOFFLINE)) 2782229997Sken retval = ctl_lun_offline(ctl_be_lun); 2783229997Sken#endif 2784229997Sken } 2785229997Sken 2786229997Sken /* 2787229997Sken * In general, the above routines should not fail. They 2788229997Sken * just set state for the LUN. So we've got something 2789229997Sken * pretty wrong here if we can't start or stop the LUN. 2790229997Sken */ 2791229997Sken if (retval != 0) { 2792229997Sken ctl_set_internal_failure(&io->scsiio, 2793229997Sken /*sks_valid*/ 1, 2794229997Sken /*retry_count*/ 0xf051); 2795229997Sken retval = CTL_RETVAL_COMPLETE; 2796229997Sken } else { 2797229997Sken ctl_set_success(&io->scsiio); 2798229997Sken } 2799229997Sken ctl_config_write_done(io); 2800229997Sken break; 2801229997Sken } 2802229997Sken default: 2803229997Sken ctl_set_invalid_opcode(&io->scsiio); 2804229997Sken ctl_config_write_done(io); 2805229997Sken retval = CTL_RETVAL_COMPLETE; 2806229997Sken break; 2807229997Sken } 2808229997Sken 2809229997Sken return (retval); 2810229997Sken} 2811229997Sken 2812229997Skenstatic int 2813229997Skenctl_be_block_config_read(union ctl_io *io) 2814229997Sken{ 2815275474Smav struct ctl_be_block_lun *be_lun; 2816275474Smav struct ctl_be_lun *ctl_be_lun; 2817275474Smav int retval = 0; 2818275474Smav 2819275474Smav DPRINTF("entered\n"); 2820275474Smav 2821275474Smav ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2822275474Smav CTL_PRIV_BACKEND_LUN].ptr; 2823275474Smav be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2824275474Smav 2825275474Smav switch (io->scsiio.cdb[0]) { 2826275474Smav case SERVICE_ACTION_IN: 2827275474Smav if (io->scsiio.cdb[1] == SGLS_SERVICE_ACTION) { 2828275474Smav mtx_lock(&be_lun->queue_lock); 2829275474Smav STAILQ_INSERT_TAIL(&be_lun->config_read_queue, 2830275474Smav &io->io_hdr, links); 2831275474Smav mtx_unlock(&be_lun->queue_lock); 2832275474Smav taskqueue_enqueue(be_lun->io_taskqueue, 2833275474Smav &be_lun->io_task); 2834275474Smav retval = CTL_RETVAL_QUEUED; 2835275474Smav break; 2836275474Smav } 2837275474Smav ctl_set_invalid_field(&io->scsiio, 2838275474Smav /*sks_valid*/ 1, 2839275474Smav /*command*/ 1, 2840275474Smav /*field*/ 1, 2841275474Smav /*bit_valid*/ 1, 2842275474Smav /*bit*/ 4); 2843275474Smav ctl_config_read_done(io); 2844275474Smav retval = CTL_RETVAL_COMPLETE; 2845275474Smav break; 2846275474Smav default: 2847275474Smav ctl_set_invalid_opcode(&io->scsiio); 2848275474Smav ctl_config_read_done(io); 2849275474Smav retval = CTL_RETVAL_COMPLETE; 2850275474Smav break; 2851275474Smav } 2852275474Smav 2853275474Smav return (retval); 2854229997Sken} 2855229997Sken 2856229997Skenstatic int 2857229997Skenctl_be_block_lun_info(void *be_lun, struct sbuf *sb) 2858229997Sken{ 2859229997Sken struct ctl_be_block_lun *lun; 2860229997Sken int retval; 2861229997Sken 2862229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2863229997Sken retval = 0; 2864229997Sken 2865268283Smav retval = sbuf_printf(sb, "\t<num_threads>"); 2866229997Sken 2867229997Sken if (retval != 0) 2868229997Sken goto bailout; 2869229997Sken 2870229997Sken retval = sbuf_printf(sb, "%d", lun->num_threads); 2871229997Sken 2872229997Sken if (retval != 0) 2873229997Sken goto bailout; 2874229997Sken 2875268283Smav retval = sbuf_printf(sb, "</num_threads>\n"); 2876229997Sken 2877229997Skenbailout: 2878229997Sken 2879229997Sken return (retval); 2880229997Sken} 2881229997Sken 2882274154Smavstatic uint64_t 2883274154Smavctl_be_block_lun_attr(void *be_lun, const char *attrname) 2884274154Smav{ 2885274154Smav struct ctl_be_block_lun *lun = (struct ctl_be_block_lun *)be_lun; 2886274154Smav 2887274154Smav if (lun->getattr == NULL) 2888274154Smav return (UINT64_MAX); 2889274154Smav return (lun->getattr(lun, attrname)); 2890274154Smav} 2891274154Smav 2892229997Skenint 2893229997Skenctl_be_block_init(void) 2894229997Sken{ 2895229997Sken struct ctl_be_block_softc *softc; 2896229997Sken int retval; 2897229997Sken 2898229997Sken softc = &backend_block_softc; 2899229997Sken retval = 0; 2900229997Sken 2901267877Smav mtx_init(&softc->lock, "ctlblock", NULL, MTX_DEF); 2902264020Strasz beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io), 2903264020Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 2904229997Sken STAILQ_INIT(&softc->disk_list); 2905229997Sken STAILQ_INIT(&softc->lun_list); 2906229997Sken 2907229997Sken return (retval); 2908229997Sken} 2909