ctl_backend_block.c revision 276616
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: stable/10/sys/cam/ctl/ctl_backend_block.c 276616 2015-01-03 13:11:39Z mav $"); 44229997Sken 45229997Sken#include <opt_kdtrace.h> 46229997Sken 47229997Sken#include <sys/param.h> 48229997Sken#include <sys/systm.h> 49229997Sken#include <sys/kernel.h> 50229997Sken#include <sys/types.h> 51229997Sken#include <sys/kthread.h> 52229997Sken#include <sys/bio.h> 53229997Sken#include <sys/fcntl.h> 54265634Smav#include <sys/limits.h> 55229997Sken#include <sys/lock.h> 56229997Sken#include <sys/mutex.h> 57229997Sken#include <sys/condvar.h> 58229997Sken#include <sys/malloc.h> 59229997Sken#include <sys/conf.h> 60229997Sken#include <sys/ioccom.h> 61229997Sken#include <sys/queue.h> 62229997Sken#include <sys/sbuf.h> 63229997Sken#include <sys/endian.h> 64229997Sken#include <sys/uio.h> 65229997Sken#include <sys/buf.h> 66229997Sken#include <sys/taskqueue.h> 67229997Sken#include <sys/vnode.h> 68229997Sken#include <sys/namei.h> 69229997Sken#include <sys/mount.h> 70229997Sken#include <sys/disk.h> 71229997Sken#include <sys/fcntl.h> 72229997Sken#include <sys/filedesc.h> 73275892Smav#include <sys/filio.h> 74229997Sken#include <sys/proc.h> 75229997Sken#include <sys/pcpu.h> 76229997Sken#include <sys/module.h> 77229997Sken#include <sys/sdt.h> 78229997Sken#include <sys/devicestat.h> 79229997Sken#include <sys/sysctl.h> 80229997Sken 81229997Sken#include <geom/geom.h> 82229997Sken 83229997Sken#include <cam/cam.h> 84229997Sken#include <cam/scsi/scsi_all.h> 85229997Sken#include <cam/scsi/scsi_da.h> 86229997Sken#include <cam/ctl/ctl_io.h> 87229997Sken#include <cam/ctl/ctl.h> 88229997Sken#include <cam/ctl/ctl_backend.h> 89229997Sken#include <cam/ctl/ctl_frontend_internal.h> 90229997Sken#include <cam/ctl/ctl_ioctl.h> 91229997Sken#include <cam/ctl/ctl_scsi_all.h> 92229997Sken#include <cam/ctl/ctl_error.h> 93229997Sken 94229997Sken/* 95265642Smav * The idea here is that we'll allocate enough S/G space to hold a 1MB 96265642Smav * I/O. If we get an I/O larger than that, we'll split it. 97229997Sken */ 98268151Smav#define CTLBLK_HALF_IO_SIZE (512 * 1024) 99268151Smav#define CTLBLK_MAX_IO_SIZE (CTLBLK_HALF_IO_SIZE * 2) 100265642Smav#define CTLBLK_MAX_SEG MAXPHYS 101268151Smav#define CTLBLK_HALF_SEGS MAX(CTLBLK_HALF_IO_SIZE / CTLBLK_MAX_SEG, 1) 102268151Smav#define CTLBLK_MAX_SEGS (CTLBLK_HALF_SEGS * 2) 103229997Sken 104229997Sken#ifdef CTLBLK_DEBUG 105229997Sken#define DPRINTF(fmt, args...) \ 106229997Sken printf("cbb(%s:%d): " fmt, __FUNCTION__, __LINE__, ##args) 107229997Sken#else 108229997Sken#define DPRINTF(fmt, args...) do {} while(0) 109229997Sken#endif 110229997Sken 111268150Smav#define PRIV(io) \ 112268150Smav ((struct ctl_ptr_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_BACKEND]) 113268151Smav#define ARGS(io) \ 114268151Smav ((struct ctl_lba_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]) 115268150Smav 116229997SkenSDT_PROVIDER_DEFINE(cbb); 117229997Sken 118229997Skentypedef enum { 119229997Sken CTL_BE_BLOCK_LUN_UNCONFIGURED = 0x01, 120229997Sken CTL_BE_BLOCK_LUN_CONFIG_ERR = 0x02, 121229997Sken CTL_BE_BLOCK_LUN_WAITING = 0x04, 122229997Sken CTL_BE_BLOCK_LUN_MULTI_THREAD = 0x08 123229997Sken} ctl_be_block_lun_flags; 124229997Sken 125229997Skentypedef enum { 126229997Sken CTL_BE_BLOCK_NONE, 127229997Sken CTL_BE_BLOCK_DEV, 128229997Sken CTL_BE_BLOCK_FILE 129229997Sken} ctl_be_block_type; 130229997Sken 131229997Skenstruct ctl_be_block_devdata { 132229997Sken struct cdev *cdev; 133229997Sken struct cdevsw *csw; 134229997Sken int dev_ref; 135229997Sken}; 136229997Sken 137229997Skenstruct ctl_be_block_filedata { 138229997Sken struct ucred *cred; 139229997Sken}; 140229997Sken 141229997Skenunion ctl_be_block_bedata { 142229997Sken struct ctl_be_block_devdata dev; 143229997Sken struct ctl_be_block_filedata file; 144229997Sken}; 145229997Sken 146229997Skenstruct ctl_be_block_io; 147229997Skenstruct ctl_be_block_lun; 148229997Sken 149229997Skentypedef void (*cbb_dispatch_t)(struct ctl_be_block_lun *be_lun, 150229997Sken struct ctl_be_block_io *beio); 151274732Smavtypedef uint64_t (*cbb_getattr_t)(struct ctl_be_block_lun *be_lun, 152274732Smav const char *attrname); 153229997Sken 154229997Sken/* 155229997Sken * Backend LUN structure. There is a 1:1 mapping between a block device 156229997Sken * and a backend block LUN, and between a backend block LUN and a CTL LUN. 157229997Sken */ 158229997Skenstruct ctl_be_block_lun { 159273315Smav struct ctl_lun_create_params params; 160229997Sken struct ctl_block_disk *disk; 161229997Sken char lunname[32]; 162229997Sken char *dev_path; 163229997Sken ctl_be_block_type dev_type; 164229997Sken struct vnode *vn; 165229997Sken union ctl_be_block_bedata backend; 166229997Sken cbb_dispatch_t dispatch; 167229997Sken cbb_dispatch_t lun_flush; 168265634Smav cbb_dispatch_t unmap; 169275892Smav cbb_dispatch_t get_lba_status; 170274732Smav cbb_getattr_t getattr; 171229997Sken uma_zone_t lun_zone; 172229997Sken uint64_t size_blocks; 173229997Sken uint64_t size_bytes; 174229997Sken uint32_t blocksize; 175229997Sken int blocksize_shift; 176264727Smav uint16_t pblockexp; 177264727Smav uint16_t pblockoff; 178276179Smav uint16_t ublockexp; 179276179Smav uint16_t ublockoff; 180276237Smav uint32_t atomicblock; 181276237Smav uint32_t opttxferlen; 182229997Sken struct ctl_be_block_softc *softc; 183229997Sken struct devstat *disk_stats; 184229997Sken ctl_be_block_lun_flags flags; 185229997Sken STAILQ_ENTRY(ctl_be_block_lun) links; 186229997Sken struct ctl_be_lun ctl_be_lun; 187229997Sken struct taskqueue *io_taskqueue; 188229997Sken struct task io_task; 189229997Sken int num_threads; 190229997Sken STAILQ_HEAD(, ctl_io_hdr) input_queue; 191275892Smav STAILQ_HEAD(, ctl_io_hdr) config_read_queue; 192229997Sken STAILQ_HEAD(, ctl_io_hdr) config_write_queue; 193229997Sken STAILQ_HEAD(, ctl_io_hdr) datamove_queue; 194268549Smav struct mtx_padalign io_lock; 195268549Smav struct mtx_padalign queue_lock; 196229997Sken}; 197229997Sken 198229997Sken/* 199229997Sken * Overall softc structure for the block backend module. 200229997Sken */ 201229997Skenstruct ctl_be_block_softc { 202229997Sken struct mtx lock; 203229997Sken int num_disks; 204229997Sken STAILQ_HEAD(, ctl_block_disk) disk_list; 205229997Sken int num_luns; 206229997Sken STAILQ_HEAD(, ctl_be_block_lun) lun_list; 207229997Sken}; 208229997Sken 209229997Skenstatic struct ctl_be_block_softc backend_block_softc; 210229997Sken 211229997Sken/* 212229997Sken * Per-I/O information. 213229997Sken */ 214229997Skenstruct ctl_be_block_io { 215229997Sken union ctl_io *io; 216229997Sken struct ctl_sg_entry sg_segs[CTLBLK_MAX_SEGS]; 217229997Sken struct iovec xiovecs[CTLBLK_MAX_SEGS]; 218229997Sken int bio_cmd; 219229997Sken int num_segs; 220229997Sken int num_bios_sent; 221229997Sken int num_bios_done; 222229997Sken int send_complete; 223229997Sken int num_errors; 224229997Sken struct bintime ds_t0; 225229997Sken devstat_tag_type ds_tag_type; 226229997Sken devstat_trans_flags ds_trans_type; 227229997Sken uint64_t io_len; 228229997Sken uint64_t io_offset; 229229997Sken struct ctl_be_block_softc *softc; 230229997Sken struct ctl_be_block_lun *lun; 231265634Smav void (*beio_cont)(struct ctl_be_block_io *beio); /* to continue processing */ 232229997Sken}; 233229997Sken 234229997Skenstatic int cbb_num_threads = 14; 235229997SkenTUNABLE_INT("kern.cam.ctl.block.num_threads", &cbb_num_threads); 236229997SkenSYSCTL_NODE(_kern_cam_ctl, OID_AUTO, block, CTLFLAG_RD, 0, 237229997Sken "CAM Target Layer Block Backend"); 238229997SkenSYSCTL_INT(_kern_cam_ctl_block, OID_AUTO, num_threads, CTLFLAG_RW, 239229997Sken &cbb_num_threads, 0, "Number of threads per backing file"); 240229997Sken 241229997Skenstatic struct ctl_be_block_io *ctl_alloc_beio(struct ctl_be_block_softc *softc); 242229997Skenstatic void ctl_free_beio(struct ctl_be_block_io *beio); 243229997Skenstatic void ctl_complete_beio(struct ctl_be_block_io *beio); 244229997Skenstatic int ctl_be_block_move_done(union ctl_io *io); 245229997Skenstatic void ctl_be_block_biodone(struct bio *bio); 246229997Skenstatic void ctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 247229997Sken struct ctl_be_block_io *beio); 248229997Skenstatic void ctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 249229997Sken struct ctl_be_block_io *beio); 250275892Smavstatic void ctl_be_block_gls_file(struct ctl_be_block_lun *be_lun, 251275892Smav struct ctl_be_block_io *beio); 252275893Smavstatic uint64_t ctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, 253275893Smav const char *attrname); 254229997Skenstatic void ctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 255229997Sken struct ctl_be_block_io *beio); 256265634Smavstatic void ctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 257265634Smav struct ctl_be_block_io *beio); 258229997Skenstatic void ctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 259229997Sken struct ctl_be_block_io *beio); 260274732Smavstatic uint64_t ctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, 261274732Smav const char *attrname); 262275892Smavstatic void ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 263275892Smav union ctl_io *io); 264229997Skenstatic void ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 265229997Sken union ctl_io *io); 266229997Skenstatic void ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 267229997Sken union ctl_io *io); 268229997Skenstatic void ctl_be_block_worker(void *context, int pending); 269229997Skenstatic int ctl_be_block_submit(union ctl_io *io); 270229997Skenstatic int ctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 271229997Sken int flag, struct thread *td); 272229997Skenstatic int ctl_be_block_open_file(struct ctl_be_block_lun *be_lun, 273229997Sken struct ctl_lun_req *req); 274229997Skenstatic int ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, 275229997Sken struct ctl_lun_req *req); 276229997Skenstatic int ctl_be_block_close(struct ctl_be_block_lun *be_lun); 277229997Skenstatic int ctl_be_block_open(struct ctl_be_block_softc *softc, 278229997Sken struct ctl_be_block_lun *be_lun, 279229997Sken struct ctl_lun_req *req); 280229997Skenstatic int ctl_be_block_create(struct ctl_be_block_softc *softc, 281229997Sken struct ctl_lun_req *req); 282229997Skenstatic int ctl_be_block_rm(struct ctl_be_block_softc *softc, 283229997Sken struct ctl_lun_req *req); 284232604Straszstatic int ctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 285232604Strasz struct ctl_lun_req *req); 286232604Straszstatic int ctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 287232604Strasz struct ctl_lun_req *req); 288232604Straszstatic int ctl_be_block_modify(struct ctl_be_block_softc *softc, 289232604Strasz struct ctl_lun_req *req); 290229997Skenstatic void ctl_be_block_lun_shutdown(void *be_lun); 291229997Skenstatic void ctl_be_block_lun_config_status(void *be_lun, 292229997Sken ctl_lun_config_status status); 293229997Skenstatic int ctl_be_block_config_write(union ctl_io *io); 294229997Skenstatic int ctl_be_block_config_read(union ctl_io *io); 295229997Skenstatic int ctl_be_block_lun_info(void *be_lun, struct sbuf *sb); 296274732Smavstatic uint64_t ctl_be_block_lun_attr(void *be_lun, const char *attrname); 297229997Skenint ctl_be_block_init(void); 298229997Sken 299229997Skenstatic struct ctl_backend_driver ctl_be_block_driver = 300229997Sken{ 301230334Sken .name = "block", 302230334Sken .flags = CTL_BE_FLAG_HAS_CONFIG, 303230334Sken .init = ctl_be_block_init, 304230334Sken .data_submit = ctl_be_block_submit, 305230334Sken .data_move_done = ctl_be_block_move_done, 306230334Sken .config_read = ctl_be_block_config_read, 307230334Sken .config_write = ctl_be_block_config_write, 308230334Sken .ioctl = ctl_be_block_ioctl, 309274732Smav .lun_info = ctl_be_block_lun_info, 310274732Smav .lun_attr = ctl_be_block_lun_attr 311229997Sken}; 312229997Sken 313229997SkenMALLOC_DEFINE(M_CTLBLK, "ctlblk", "Memory used for CTL block backend"); 314229997SkenCTL_BACKEND_DECLARE(cbb, ctl_be_block_driver); 315229997Sken 316265494Straszstatic uma_zone_t beio_zone; 317265494Strasz 318229997Skenstatic struct ctl_be_block_io * 319229997Skenctl_alloc_beio(struct ctl_be_block_softc *softc) 320229997Sken{ 321229997Sken struct ctl_be_block_io *beio; 322229997Sken 323265494Strasz beio = uma_zalloc(beio_zone, M_WAITOK | M_ZERO); 324265494Strasz beio->softc = softc; 325229997Sken return (beio); 326229997Sken} 327229997Sken 328229997Skenstatic void 329229997Skenctl_free_beio(struct ctl_be_block_io *beio) 330229997Sken{ 331229997Sken int duplicate_free; 332229997Sken int i; 333229997Sken 334229997Sken duplicate_free = 0; 335229997Sken 336229997Sken for (i = 0; i < beio->num_segs; i++) { 337229997Sken if (beio->sg_segs[i].addr == NULL) 338229997Sken duplicate_free++; 339229997Sken 340229997Sken uma_zfree(beio->lun->lun_zone, beio->sg_segs[i].addr); 341229997Sken beio->sg_segs[i].addr = NULL; 342268151Smav 343268151Smav /* For compare we had two equal S/G lists. */ 344268151Smav if (ARGS(beio->io)->flags & CTL_LLF_COMPARE) { 345268151Smav uma_zfree(beio->lun->lun_zone, 346268151Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr); 347268151Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = NULL; 348268151Smav } 349229997Sken } 350229997Sken 351229997Sken if (duplicate_free > 0) { 352229997Sken printf("%s: %d duplicate frees out of %d segments\n", __func__, 353229997Sken duplicate_free, beio->num_segs); 354229997Sken } 355229997Sken 356265494Strasz uma_zfree(beio_zone, beio); 357229997Sken} 358229997Sken 359229997Skenstatic void 360229997Skenctl_complete_beio(struct ctl_be_block_io *beio) 361229997Sken{ 362268549Smav union ctl_io *io = beio->io; 363229997Sken 364265634Smav if (beio->beio_cont != NULL) { 365265634Smav beio->beio_cont(beio); 366265634Smav } else { 367265634Smav ctl_free_beio(beio); 368268151Smav ctl_data_submit_done(io); 369265634Smav } 370229997Sken} 371229997Sken 372229997Skenstatic int 373229997Skenctl_be_block_move_done(union ctl_io *io) 374229997Sken{ 375229997Sken struct ctl_be_block_io *beio; 376229997Sken struct ctl_be_block_lun *be_lun; 377268151Smav struct ctl_lba_len_flags *lbalen; 378229997Sken#ifdef CTL_TIME_IO 379229997Sken struct bintime cur_bt; 380268151Smav#endif 381268151Smav int i; 382229997Sken 383268150Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 384229997Sken be_lun = beio->lun; 385229997Sken 386229997Sken DPRINTF("entered\n"); 387229997Sken 388229997Sken#ifdef CTL_TIME_IO 389229997Sken getbintime(&cur_bt); 390229997Sken bintime_sub(&cur_bt, &io->io_hdr.dma_start_bt); 391229997Sken bintime_add(&io->io_hdr.dma_bt, &cur_bt); 392229997Sken io->io_hdr.num_dmas++; 393229997Sken#endif 394268151Smav io->scsiio.kern_rel_offset += io->scsiio.kern_data_len; 395229997Sken 396229997Sken /* 397229997Sken * We set status at this point for read commands, and write 398229997Sken * commands with errors. 399229997Sken */ 400275881Smav if (io->io_hdr.flags & CTL_FLAG_ABORT) { 401275881Smav ; 402275881Smav } else if ((io->io_hdr.port_status == 0) && 403268151Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) { 404268151Smav lbalen = ARGS(beio->io); 405268151Smav if (lbalen->flags & CTL_LLF_READ) { 406268151Smav ctl_set_success(&io->scsiio); 407268151Smav } else if (lbalen->flags & CTL_LLF_COMPARE) { 408268151Smav /* We have two data blocks ready for comparison. */ 409268151Smav for (i = 0; i < beio->num_segs; i++) { 410268151Smav if (memcmp(beio->sg_segs[i].addr, 411268151Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr, 412268151Smav beio->sg_segs[i].len) != 0) 413268151Smav break; 414268151Smav } 415268151Smav if (i < beio->num_segs) 416268151Smav ctl_set_sense(&io->scsiio, 417268151Smav /*current_error*/ 1, 418268151Smav /*sense_key*/ SSD_KEY_MISCOMPARE, 419268151Smav /*asc*/ 0x1D, 420268151Smav /*ascq*/ 0x00, 421268151Smav SSD_ELEM_NONE); 422268151Smav else 423268151Smav ctl_set_success(&io->scsiio); 424268151Smav } 425275881Smav } else if ((io->io_hdr.port_status != 0) && 426275881Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE || 427275881Smav (io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS)) { 428229997Sken /* 429229997Sken * For hardware error sense keys, the sense key 430229997Sken * specific value is defined to be a retry count, 431229997Sken * but we use it to pass back an internal FETD 432229997Sken * error code. XXX KDM Hopefully the FETD is only 433229997Sken * using 16 bits for an error code, since that's 434229997Sken * all the space we have in the sks field. 435229997Sken */ 436229997Sken ctl_set_internal_failure(&io->scsiio, 437229997Sken /*sks_valid*/ 1, 438229997Sken /*retry_count*/ 439229997Sken io->io_hdr.port_status); 440229997Sken } 441229997Sken 442229997Sken /* 443229997Sken * If this is a read, or a write with errors, it is done. 444229997Sken */ 445229997Sken if ((beio->bio_cmd == BIO_READ) 446229997Sken || ((io->io_hdr.flags & CTL_FLAG_ABORT) != 0) 447229997Sken || ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)) { 448229997Sken ctl_complete_beio(beio); 449229997Sken return (0); 450229997Sken } 451229997Sken 452229997Sken /* 453229997Sken * At this point, we have a write and the DMA completed 454229997Sken * successfully. We now have to queue it to the task queue to 455229997Sken * execute the backend I/O. That is because we do blocking 456229997Sken * memory allocations, and in the file backing case, blocking I/O. 457229997Sken * This move done routine is generally called in the SIM's 458229997Sken * interrupt context, and therefore we cannot block. 459229997Sken */ 460268549Smav mtx_lock(&be_lun->queue_lock); 461229997Sken /* 462229997Sken * XXX KDM make sure that links is okay to use at this point. 463229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 464229997Sken * or deal with resource allocation here. 465229997Sken */ 466229997Sken STAILQ_INSERT_TAIL(&be_lun->datamove_queue, &io->io_hdr, links); 467268549Smav mtx_unlock(&be_lun->queue_lock); 468229997Sken 469229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 470229997Sken 471229997Sken return (0); 472229997Sken} 473229997Sken 474229997Skenstatic void 475229997Skenctl_be_block_biodone(struct bio *bio) 476229997Sken{ 477229997Sken struct ctl_be_block_io *beio; 478229997Sken struct ctl_be_block_lun *be_lun; 479229997Sken union ctl_io *io; 480262299Smav int error; 481229997Sken 482229997Sken beio = bio->bio_caller1; 483229997Sken be_lun = beio->lun; 484229997Sken io = beio->io; 485229997Sken 486229997Sken DPRINTF("entered\n"); 487229997Sken 488262299Smav error = bio->bio_error; 489268549Smav mtx_lock(&be_lun->io_lock); 490262299Smav if (error != 0) 491229997Sken beio->num_errors++; 492229997Sken 493229997Sken beio->num_bios_done++; 494229997Sken 495229997Sken /* 496229997Sken * XXX KDM will this cause WITNESS to complain? Holding a lock 497229997Sken * during the free might cause it to complain. 498229997Sken */ 499229997Sken g_destroy_bio(bio); 500229997Sken 501229997Sken /* 502229997Sken * If the send complete bit isn't set, or we aren't the last I/O to 503229997Sken * complete, then we're done. 504229997Sken */ 505229997Sken if ((beio->send_complete == 0) 506229997Sken || (beio->num_bios_done < beio->num_bios_sent)) { 507268549Smav mtx_unlock(&be_lun->io_lock); 508229997Sken return; 509229997Sken } 510229997Sken 511229997Sken /* 512229997Sken * At this point, we've verified that we are the last I/O to 513229997Sken * complete, so it's safe to drop the lock. 514229997Sken */ 515268549Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 516268549Smav beio->ds_tag_type, beio->ds_trans_type, 517268549Smav /*now*/ NULL, /*then*/&beio->ds_t0); 518268549Smav mtx_unlock(&be_lun->io_lock); 519229997Sken 520229997Sken /* 521229997Sken * If there are any errors from the backing device, we fail the 522229997Sken * entire I/O with a medium error. 523229997Sken */ 524229997Sken if (beio->num_errors > 0) { 525262299Smav if (error == EOPNOTSUPP) { 526262299Smav ctl_set_invalid_opcode(&io->scsiio); 527274004Smav } else if (error == ENOSPC) { 528274004Smav ctl_set_space_alloc_fail(&io->scsiio); 529262299Smav } else if (beio->bio_cmd == BIO_FLUSH) { 530229997Sken /* XXX KDM is there is a better error here? */ 531229997Sken ctl_set_internal_failure(&io->scsiio, 532229997Sken /*sks_valid*/ 1, 533229997Sken /*retry_count*/ 0xbad2); 534229997Sken } else 535229997Sken ctl_set_medium_error(&io->scsiio); 536229997Sken ctl_complete_beio(beio); 537229997Sken return; 538229997Sken } 539229997Sken 540229997Sken /* 541268151Smav * If this is a write, a flush, a delete or verify, we're all done. 542229997Sken * If this is a read, we can now send the data to the user. 543229997Sken */ 544229997Sken if ((beio->bio_cmd == BIO_WRITE) 545265634Smav || (beio->bio_cmd == BIO_FLUSH) 546268151Smav || (beio->bio_cmd == BIO_DELETE) 547268151Smav || (ARGS(io)->flags & CTL_LLF_VERIFY)) { 548229997Sken ctl_set_success(&io->scsiio); 549229997Sken ctl_complete_beio(beio); 550229997Sken } else { 551275881Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 552275881Smav beio->beio_cont == NULL) 553275881Smav ctl_set_success(&io->scsiio); 554229997Sken#ifdef CTL_TIME_IO 555229997Sken getbintime(&io->io_hdr.dma_start_bt); 556229997Sken#endif 557229997Sken ctl_datamove(io); 558229997Sken } 559229997Sken} 560229997Sken 561229997Skenstatic void 562229997Skenctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 563229997Sken struct ctl_be_block_io *beio) 564229997Sken{ 565268549Smav union ctl_io *io = beio->io; 566229997Sken struct mount *mountpoint; 567241896Skib int error, lock_flags; 568229997Sken 569229997Sken DPRINTF("entered\n"); 570229997Sken 571268549Smav binuptime(&beio->ds_t0); 572268549Smav mtx_lock(&be_lun->io_lock); 573268549Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 574268549Smav mtx_unlock(&be_lun->io_lock); 575229997Sken 576268549Smav (void) vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 577229997Sken 578229997Sken if (MNT_SHARED_WRITES(mountpoint) 579229997Sken || ((mountpoint == NULL) 580229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 581229997Sken lock_flags = LK_SHARED; 582229997Sken else 583229997Sken lock_flags = LK_EXCLUSIVE; 584229997Sken 585229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 586229997Sken 587229997Sken error = VOP_FSYNC(be_lun->vn, MNT_WAIT, curthread); 588229997Sken VOP_UNLOCK(be_lun->vn, 0); 589229997Sken 590229997Sken vn_finished_write(mountpoint); 591229997Sken 592268549Smav mtx_lock(&be_lun->io_lock); 593268549Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 594268549Smav beio->ds_tag_type, beio->ds_trans_type, 595268549Smav /*now*/ NULL, /*then*/&beio->ds_t0); 596268549Smav mtx_unlock(&be_lun->io_lock); 597268549Smav 598229997Sken if (error == 0) 599229997Sken ctl_set_success(&io->scsiio); 600229997Sken else { 601229997Sken /* XXX KDM is there is a better error here? */ 602229997Sken ctl_set_internal_failure(&io->scsiio, 603229997Sken /*sks_valid*/ 1, 604229997Sken /*retry_count*/ 0xbad1); 605229997Sken } 606229997Sken 607229997Sken ctl_complete_beio(beio); 608229997Sken} 609229997Sken 610260817SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_start, "uint64_t"); 611260817SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_start, "uint64_t"); 612260817SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_done,"uint64_t"); 613260817SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_done, "uint64_t"); 614229997Sken 615229997Skenstatic void 616229997Skenctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 617229997Sken struct ctl_be_block_io *beio) 618229997Sken{ 619229997Sken struct ctl_be_block_filedata *file_data; 620229997Sken union ctl_io *io; 621229997Sken struct uio xuio; 622229997Sken struct iovec *xiovec; 623241896Skib int flags; 624229997Sken int error, i; 625229997Sken 626229997Sken DPRINTF("entered\n"); 627229997Sken 628229997Sken file_data = &be_lun->backend.file; 629229997Sken io = beio->io; 630272616Smav flags = 0; 631272616Smav if (ARGS(io)->flags & CTL_LLF_DPO) 632272616Smav flags |= IO_DIRECT; 633272616Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 634272616Smav flags |= IO_SYNC; 635229997Sken 636268151Smav bzero(&xuio, sizeof(xuio)); 637229997Sken if (beio->bio_cmd == BIO_READ) { 638229997Sken SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 639268151Smav xuio.uio_rw = UIO_READ; 640229997Sken } else { 641229997Sken SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 642268151Smav xuio.uio_rw = UIO_WRITE; 643229997Sken } 644229997Sken xuio.uio_offset = beio->io_offset; 645229997Sken xuio.uio_resid = beio->io_len; 646229997Sken xuio.uio_segflg = UIO_SYSSPACE; 647229997Sken xuio.uio_iov = beio->xiovecs; 648229997Sken xuio.uio_iovcnt = beio->num_segs; 649229997Sken xuio.uio_td = curthread; 650229997Sken 651229997Sken for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 652229997Sken xiovec->iov_base = beio->sg_segs[i].addr; 653229997Sken xiovec->iov_len = beio->sg_segs[i].len; 654229997Sken } 655229997Sken 656268549Smav binuptime(&beio->ds_t0); 657268549Smav mtx_lock(&be_lun->io_lock); 658268549Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 659268549Smav mtx_unlock(&be_lun->io_lock); 660268549Smav 661229997Sken if (beio->bio_cmd == BIO_READ) { 662229997Sken vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 663229997Sken 664229997Sken /* 665229997Sken * UFS pays attention to IO_DIRECT for reads. If the 666229997Sken * DIRECTIO option is configured into the kernel, it calls 667229997Sken * ffs_rawread(). But that only works for single-segment 668229997Sken * uios with user space addresses. In our case, with a 669229997Sken * kernel uio, it still reads into the buffer cache, but it 670229997Sken * will just try to release the buffer from the cache later 671229997Sken * on in ffs_read(). 672229997Sken * 673229997Sken * ZFS does not pay attention to IO_DIRECT for reads. 674229997Sken * 675229997Sken * UFS does not pay attention to IO_SYNC for reads. 676229997Sken * 677229997Sken * ZFS pays attention to IO_SYNC (which translates into the 678229997Sken * Solaris define FRSYNC for zfs_read()) for reads. It 679229997Sken * attempts to sync the file before reading. 680229997Sken * 681229997Sken * So, to attempt to provide some barrier semantics in the 682229997Sken * BIO_ORDERED case, set both IO_DIRECT and IO_SYNC. 683229997Sken */ 684272616Smav error = VOP_READ(be_lun->vn, &xuio, flags, file_data->cred); 685229997Sken 686229997Sken VOP_UNLOCK(be_lun->vn, 0); 687268151Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 688229997Sken } else { 689229997Sken struct mount *mountpoint; 690229997Sken int lock_flags; 691229997Sken 692229997Sken (void)vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 693229997Sken 694229997Sken if (MNT_SHARED_WRITES(mountpoint) 695229997Sken || ((mountpoint == NULL) 696229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 697229997Sken lock_flags = LK_SHARED; 698229997Sken else 699229997Sken lock_flags = LK_EXCLUSIVE; 700229997Sken 701229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 702229997Sken 703229997Sken /* 704229997Sken * UFS pays attention to IO_DIRECT for writes. The write 705229997Sken * is done asynchronously. (Normally the write would just 706229997Sken * get put into cache. 707229997Sken * 708229997Sken * UFS pays attention to IO_SYNC for writes. It will 709229997Sken * attempt to write the buffer out synchronously if that 710229997Sken * flag is set. 711229997Sken * 712229997Sken * ZFS does not pay attention to IO_DIRECT for writes. 713229997Sken * 714229997Sken * ZFS pays attention to IO_SYNC (a.k.a. FSYNC or FRSYNC) 715229997Sken * for writes. It will flush the transaction from the 716229997Sken * cache before returning. 717229997Sken * 718229997Sken * So if we've got the BIO_ORDERED flag set, we want 719229997Sken * IO_SYNC in either the UFS or ZFS case. 720229997Sken */ 721272616Smav error = VOP_WRITE(be_lun->vn, &xuio, flags, file_data->cred); 722229997Sken VOP_UNLOCK(be_lun->vn, 0); 723229997Sken 724229997Sken vn_finished_write(mountpoint); 725268151Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 726229997Sken } 727229997Sken 728268549Smav mtx_lock(&be_lun->io_lock); 729268549Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 730268549Smav beio->ds_tag_type, beio->ds_trans_type, 731268549Smav /*now*/ NULL, /*then*/&beio->ds_t0); 732268549Smav mtx_unlock(&be_lun->io_lock); 733268549Smav 734229997Sken /* 735229997Sken * If we got an error, set the sense data to "MEDIUM ERROR" and 736229997Sken * return the I/O to the user. 737229997Sken */ 738229997Sken if (error != 0) { 739229997Sken char path_str[32]; 740229997Sken 741229997Sken ctl_scsi_path_string(io, path_str, sizeof(path_str)); 742229997Sken printf("%s%s command returned errno %d\n", path_str, 743229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", error); 744274004Smav if (error == ENOSPC) { 745274004Smav ctl_set_space_alloc_fail(&io->scsiio); 746274004Smav } else 747274004Smav ctl_set_medium_error(&io->scsiio); 748229997Sken ctl_complete_beio(beio); 749229997Sken return; 750229997Sken } 751229997Sken 752229997Sken /* 753269226Smav * If this is a write or a verify, we're all done. 754229997Sken * If this is a read, we can now send the data to the user. 755229997Sken */ 756269226Smav if ((beio->bio_cmd == BIO_WRITE) || 757269226Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 758229997Sken ctl_set_success(&io->scsiio); 759229997Sken ctl_complete_beio(beio); 760229997Sken } else { 761275881Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 762275881Smav beio->beio_cont == NULL) 763275881Smav ctl_set_success(&io->scsiio); 764229997Sken#ifdef CTL_TIME_IO 765229997Sken getbintime(&io->io_hdr.dma_start_bt); 766229997Sken#endif 767229997Sken ctl_datamove(io); 768229997Sken } 769229997Sken} 770229997Sken 771229997Skenstatic void 772275892Smavctl_be_block_gls_file(struct ctl_be_block_lun *be_lun, 773275892Smav struct ctl_be_block_io *beio) 774275892Smav{ 775275892Smav union ctl_io *io = beio->io; 776275892Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 777275892Smav struct scsi_get_lba_status_data *data; 778275892Smav off_t roff, off; 779275892Smav int error, status; 780275892Smav 781275892Smav DPRINTF("entered\n"); 782275892Smav 783275892Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 784275892Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 785275892Smav error = VOP_IOCTL(be_lun->vn, FIOSEEKHOLE, &off, 786275892Smav 0, curthread->td_ucred, curthread); 787275892Smav if (error == 0 && off > roff) 788275892Smav status = 0; /* mapped up to off */ 789275892Smav else { 790275892Smav error = VOP_IOCTL(be_lun->vn, FIOSEEKDATA, &off, 791275892Smav 0, curthread->td_ucred, curthread); 792275892Smav if (error == 0 && off > roff) 793275892Smav status = 1; /* deallocated up to off */ 794275892Smav else { 795275892Smav status = 0; /* unknown up to the end */ 796275892Smav off = be_lun->size_bytes; 797275892Smav } 798275892Smav } 799275892Smav VOP_UNLOCK(be_lun->vn, 0); 800275892Smav 801275892Smav off >>= be_lun->blocksize_shift; 802275892Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 803275892Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 804275892Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 805275892Smav data->descr[0].length); 806275892Smav data->descr[0].status = status; 807275892Smav 808275892Smav ctl_complete_beio(beio); 809275892Smav} 810275892Smav 811275893Smavstatic uint64_t 812275893Smavctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, const char *attrname) 813275893Smav{ 814275893Smav struct vattr vattr; 815275893Smav struct statfs statfs; 816275893Smav int error; 817275893Smav 818275893Smav if (be_lun->vn == NULL) 819275893Smav return (UINT64_MAX); 820275893Smav if (strcmp(attrname, "blocksused") == 0) { 821275893Smav error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 822275893Smav if (error != 0) 823275893Smav return (UINT64_MAX); 824275893Smav return (vattr.va_bytes >> be_lun->blocksize_shift); 825275893Smav } 826275893Smav if (strcmp(attrname, "blocksavail") == 0) { 827275893Smav error = VFS_STATFS(be_lun->vn->v_mount, &statfs); 828275893Smav if (error != 0) 829275893Smav return (UINT64_MAX); 830275893Smav return ((statfs.f_bavail * statfs.f_bsize) >> 831275893Smav be_lun->blocksize_shift); 832275893Smav } 833275893Smav return (UINT64_MAX); 834275893Smav} 835275893Smav 836275892Smavstatic void 837269429Smavctl_be_block_dispatch_zvol(struct ctl_be_block_lun *be_lun, 838269429Smav struct ctl_be_block_io *beio) 839269429Smav{ 840269429Smav struct ctl_be_block_devdata *dev_data; 841269429Smav union ctl_io *io; 842269429Smav struct uio xuio; 843269429Smav struct iovec *xiovec; 844269429Smav int flags; 845269429Smav int error, i; 846269429Smav 847269429Smav DPRINTF("entered\n"); 848269429Smav 849269429Smav dev_data = &be_lun->backend.dev; 850269429Smav io = beio->io; 851272616Smav flags = 0; 852272616Smav if (ARGS(io)->flags & CTL_LLF_DPO) 853272616Smav flags |= IO_DIRECT; 854272616Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 855272616Smav flags |= IO_SYNC; 856269429Smav 857269429Smav bzero(&xuio, sizeof(xuio)); 858269429Smav if (beio->bio_cmd == BIO_READ) { 859269429Smav SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 860269429Smav xuio.uio_rw = UIO_READ; 861269429Smav } else { 862269429Smav SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 863269429Smav xuio.uio_rw = UIO_WRITE; 864269429Smav } 865269429Smav xuio.uio_offset = beio->io_offset; 866269429Smav xuio.uio_resid = beio->io_len; 867269429Smav xuio.uio_segflg = UIO_SYSSPACE; 868269429Smav xuio.uio_iov = beio->xiovecs; 869269429Smav xuio.uio_iovcnt = beio->num_segs; 870269429Smav xuio.uio_td = curthread; 871269429Smav 872269429Smav for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 873269429Smav xiovec->iov_base = beio->sg_segs[i].addr; 874269429Smav xiovec->iov_len = beio->sg_segs[i].len; 875269429Smav } 876269429Smav 877269429Smav binuptime(&beio->ds_t0); 878269429Smav mtx_lock(&be_lun->io_lock); 879269429Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 880269429Smav mtx_unlock(&be_lun->io_lock); 881269429Smav 882269429Smav if (beio->bio_cmd == BIO_READ) { 883272616Smav error = (*dev_data->csw->d_read)(dev_data->cdev, &xuio, flags); 884269429Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 885269429Smav } else { 886272616Smav error = (*dev_data->csw->d_write)(dev_data->cdev, &xuio, flags); 887269429Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 888269429Smav } 889269429Smav 890269429Smav mtx_lock(&be_lun->io_lock); 891269429Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 892269429Smav beio->ds_tag_type, beio->ds_trans_type, 893269429Smav /*now*/ NULL, /*then*/&beio->ds_t0); 894269429Smav mtx_unlock(&be_lun->io_lock); 895269429Smav 896269429Smav /* 897269429Smav * If we got an error, set the sense data to "MEDIUM ERROR" and 898269429Smav * return the I/O to the user. 899269429Smav */ 900269429Smav if (error != 0) { 901274004Smav if (error == ENOSPC) { 902274004Smav ctl_set_space_alloc_fail(&io->scsiio); 903274004Smav } else 904274004Smav ctl_set_medium_error(&io->scsiio); 905269429Smav ctl_complete_beio(beio); 906269429Smav return; 907269429Smav } 908269429Smav 909269429Smav /* 910269429Smav * If this is a write or a verify, we're all done. 911269429Smav * If this is a read, we can now send the data to the user. 912269429Smav */ 913269429Smav if ((beio->bio_cmd == BIO_WRITE) || 914269429Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 915269429Smav ctl_set_success(&io->scsiio); 916269429Smav ctl_complete_beio(beio); 917269429Smav } else { 918275881Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 919275881Smav beio->beio_cont == NULL) 920275881Smav ctl_set_success(&io->scsiio); 921269429Smav#ifdef CTL_TIME_IO 922269429Smav getbintime(&io->io_hdr.dma_start_bt); 923269429Smav#endif 924269429Smav ctl_datamove(io); 925269429Smav } 926269429Smav} 927269429Smav 928269429Smavstatic void 929275892Smavctl_be_block_gls_zvol(struct ctl_be_block_lun *be_lun, 930275892Smav struct ctl_be_block_io *beio) 931275892Smav{ 932275892Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 933275892Smav union ctl_io *io = beio->io; 934275892Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 935275892Smav struct scsi_get_lba_status_data *data; 936275892Smav off_t roff, off; 937275892Smav int error, status; 938275892Smav 939275892Smav DPRINTF("entered\n"); 940275892Smav 941275892Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 942275892Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKHOLE, 943275892Smav (caddr_t)&off, FREAD, curthread); 944275892Smav if (error == 0 && off > roff) 945275892Smav status = 0; /* mapped up to off */ 946275892Smav else { 947275892Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKDATA, 948275892Smav (caddr_t)&off, FREAD, curthread); 949275892Smav if (error == 0 && off > roff) 950275892Smav status = 1; /* deallocated up to off */ 951275892Smav else { 952275892Smav status = 0; /* unknown up to the end */ 953275892Smav off = be_lun->size_bytes; 954275892Smav } 955275892Smav } 956275892Smav 957275892Smav off >>= be_lun->blocksize_shift; 958275892Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 959275892Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 960275892Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 961275892Smav data->descr[0].length); 962275892Smav data->descr[0].status = status; 963275892Smav 964275892Smav ctl_complete_beio(beio); 965275892Smav} 966275892Smav 967275892Smavstatic void 968229997Skenctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 969229997Sken struct ctl_be_block_io *beio) 970229997Sken{ 971229997Sken struct bio *bio; 972229997Sken union ctl_io *io; 973229997Sken struct ctl_be_block_devdata *dev_data; 974229997Sken 975229997Sken dev_data = &be_lun->backend.dev; 976229997Sken io = beio->io; 977229997Sken 978229997Sken DPRINTF("entered\n"); 979229997Sken 980229997Sken /* This can't fail, it's a blocking allocation. */ 981229997Sken bio = g_alloc_bio(); 982229997Sken 983229997Sken bio->bio_cmd = BIO_FLUSH; 984229997Sken bio->bio_flags |= BIO_ORDERED; 985229997Sken bio->bio_dev = dev_data->cdev; 986229997Sken bio->bio_offset = 0; 987229997Sken bio->bio_data = 0; 988229997Sken bio->bio_done = ctl_be_block_biodone; 989229997Sken bio->bio_caller1 = beio; 990229997Sken bio->bio_pblkno = 0; 991229997Sken 992229997Sken /* 993229997Sken * We don't need to acquire the LUN lock here, because we are only 994229997Sken * sending one bio, and so there is no other context to synchronize 995229997Sken * with. 996229997Sken */ 997229997Sken beio->num_bios_sent = 1; 998229997Sken beio->send_complete = 1; 999229997Sken 1000229997Sken binuptime(&beio->ds_t0); 1001268549Smav mtx_lock(&be_lun->io_lock); 1002229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1003268549Smav mtx_unlock(&be_lun->io_lock); 1004229997Sken 1005229997Sken (*dev_data->csw->d_strategy)(bio); 1006229997Sken} 1007229997Sken 1008229997Skenstatic void 1009265634Smavctl_be_block_unmap_dev_range(struct ctl_be_block_lun *be_lun, 1010265634Smav struct ctl_be_block_io *beio, 1011265634Smav uint64_t off, uint64_t len, int last) 1012265634Smav{ 1013265634Smav struct bio *bio; 1014265634Smav struct ctl_be_block_devdata *dev_data; 1015265634Smav uint64_t maxlen; 1016265634Smav 1017265634Smav dev_data = &be_lun->backend.dev; 1018265634Smav maxlen = LONG_MAX - (LONG_MAX % be_lun->blocksize); 1019265634Smav while (len > 0) { 1020265634Smav bio = g_alloc_bio(); 1021265634Smav bio->bio_cmd = BIO_DELETE; 1022265634Smav bio->bio_dev = dev_data->cdev; 1023265634Smav bio->bio_offset = off; 1024265634Smav bio->bio_length = MIN(len, maxlen); 1025265634Smav bio->bio_data = 0; 1026265634Smav bio->bio_done = ctl_be_block_biodone; 1027265634Smav bio->bio_caller1 = beio; 1028265634Smav bio->bio_pblkno = off / be_lun->blocksize; 1029265634Smav 1030265634Smav off += bio->bio_length; 1031265634Smav len -= bio->bio_length; 1032265634Smav 1033268549Smav mtx_lock(&be_lun->io_lock); 1034265634Smav beio->num_bios_sent++; 1035265634Smav if (last && len == 0) 1036265634Smav beio->send_complete = 1; 1037268549Smav mtx_unlock(&be_lun->io_lock); 1038265634Smav 1039265634Smav (*dev_data->csw->d_strategy)(bio); 1040265634Smav } 1041265634Smav} 1042265634Smav 1043265634Smavstatic void 1044265634Smavctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 1045265634Smav struct ctl_be_block_io *beio) 1046265634Smav{ 1047265634Smav union ctl_io *io; 1048265634Smav struct ctl_be_block_devdata *dev_data; 1049268149Smav struct ctl_ptr_len_flags *ptrlen; 1050265634Smav struct scsi_unmap_desc *buf, *end; 1051265634Smav uint64_t len; 1052265634Smav 1053265634Smav dev_data = &be_lun->backend.dev; 1054265634Smav io = beio->io; 1055265634Smav 1056265634Smav DPRINTF("entered\n"); 1057265634Smav 1058265634Smav binuptime(&beio->ds_t0); 1059268549Smav mtx_lock(&be_lun->io_lock); 1060265634Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1061268549Smav mtx_unlock(&be_lun->io_lock); 1062265634Smav 1063265634Smav if (beio->io_offset == -1) { 1064265634Smav beio->io_len = 0; 1065268149Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1066268149Smav buf = (struct scsi_unmap_desc *)ptrlen->ptr; 1067268149Smav end = buf + ptrlen->len / sizeof(*buf); 1068265634Smav for (; buf < end; buf++) { 1069265634Smav len = (uint64_t)scsi_4btoul(buf->length) * 1070265634Smav be_lun->blocksize; 1071265634Smav beio->io_len += len; 1072265634Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1073265634Smav scsi_8btou64(buf->lba) * be_lun->blocksize, len, 1074265634Smav (end - buf < 2) ? TRUE : FALSE); 1075265634Smav } 1076265634Smav } else 1077265634Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1078265634Smav beio->io_offset, beio->io_len, TRUE); 1079265634Smav} 1080265634Smav 1081265634Smavstatic void 1082229997Skenctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 1083229997Sken struct ctl_be_block_io *beio) 1084229997Sken{ 1085268549Smav TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 1086229997Sken int i; 1087229997Sken struct bio *bio; 1088229997Sken struct ctl_be_block_devdata *dev_data; 1089229997Sken off_t cur_offset; 1090229997Sken int max_iosize; 1091229997Sken 1092229997Sken DPRINTF("entered\n"); 1093229997Sken 1094229997Sken dev_data = &be_lun->backend.dev; 1095229997Sken 1096229997Sken /* 1097229997Sken * We have to limit our I/O size to the maximum supported by the 1098229997Sken * backend device. Hopefully it is MAXPHYS. If the driver doesn't 1099229997Sken * set it properly, use DFLTPHYS. 1100229997Sken */ 1101229997Sken max_iosize = dev_data->cdev->si_iosize_max; 1102229997Sken if (max_iosize < PAGE_SIZE) 1103229997Sken max_iosize = DFLTPHYS; 1104229997Sken 1105229997Sken cur_offset = beio->io_offset; 1106229997Sken for (i = 0; i < beio->num_segs; i++) { 1107229997Sken size_t cur_size; 1108229997Sken uint8_t *cur_ptr; 1109229997Sken 1110229997Sken cur_size = beio->sg_segs[i].len; 1111229997Sken cur_ptr = beio->sg_segs[i].addr; 1112229997Sken 1113229997Sken while (cur_size > 0) { 1114229997Sken /* This can't fail, it's a blocking allocation. */ 1115229997Sken bio = g_alloc_bio(); 1116229997Sken 1117229997Sken KASSERT(bio != NULL, ("g_alloc_bio() failed!\n")); 1118229997Sken 1119229997Sken bio->bio_cmd = beio->bio_cmd; 1120229997Sken bio->bio_dev = dev_data->cdev; 1121229997Sken bio->bio_caller1 = beio; 1122229997Sken bio->bio_length = min(cur_size, max_iosize); 1123229997Sken bio->bio_offset = cur_offset; 1124229997Sken bio->bio_data = cur_ptr; 1125229997Sken bio->bio_done = ctl_be_block_biodone; 1126229997Sken bio->bio_pblkno = cur_offset / be_lun->blocksize; 1127229997Sken 1128229997Sken cur_offset += bio->bio_length; 1129229997Sken cur_ptr += bio->bio_length; 1130229997Sken cur_size -= bio->bio_length; 1131229997Sken 1132268549Smav TAILQ_INSERT_TAIL(&queue, bio, bio_queue); 1133229997Sken beio->num_bios_sent++; 1134229997Sken } 1135229997Sken } 1136268549Smav binuptime(&beio->ds_t0); 1137268549Smav mtx_lock(&be_lun->io_lock); 1138268549Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1139268549Smav beio->send_complete = 1; 1140268549Smav mtx_unlock(&be_lun->io_lock); 1141268549Smav 1142268549Smav /* 1143268549Smav * Fire off all allocated requests! 1144268549Smav */ 1145268549Smav while ((bio = TAILQ_FIRST(&queue)) != NULL) { 1146268549Smav TAILQ_REMOVE(&queue, bio, bio_queue); 1147268549Smav (*dev_data->csw->d_strategy)(bio); 1148268549Smav } 1149229997Sken} 1150229997Sken 1151274732Smavstatic uint64_t 1152274732Smavctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, const char *attrname) 1153274732Smav{ 1154274732Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 1155274732Smav struct diocgattr_arg arg; 1156274732Smav int error; 1157274732Smav 1158274732Smav if (dev_data->csw == NULL || dev_data->csw->d_ioctl == NULL) 1159274732Smav return (UINT64_MAX); 1160274732Smav strlcpy(arg.name, attrname, sizeof(arg.name)); 1161274732Smav arg.len = sizeof(arg.value.off); 1162274732Smav error = dev_data->csw->d_ioctl(dev_data->cdev, 1163274732Smav DIOCGATTR, (caddr_t)&arg, FREAD, curthread); 1164274732Smav if (error != 0) 1165274732Smav return (UINT64_MAX); 1166274732Smav return (arg.value.off); 1167274732Smav} 1168274732Smav 1169229997Skenstatic void 1170265634Smavctl_be_block_cw_done_ws(struct ctl_be_block_io *beio) 1171265634Smav{ 1172265634Smav union ctl_io *io; 1173265634Smav 1174265634Smav io = beio->io; 1175265634Smav ctl_free_beio(beio); 1176268261Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1177268261Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1178268261Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1179265634Smav ctl_config_write_done(io); 1180265634Smav return; 1181265634Smav } 1182265634Smav 1183265634Smav ctl_be_block_config_write(io); 1184265634Smav} 1185265634Smav 1186265634Smavstatic void 1187265634Smavctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun, 1188265634Smav union ctl_io *io) 1189265634Smav{ 1190265634Smav struct ctl_be_block_io *beio; 1191265634Smav struct ctl_be_block_softc *softc; 1192268149Smav struct ctl_lba_len_flags *lbalen; 1193265634Smav uint64_t len_left, lba; 1194265634Smav int i, seglen; 1195265634Smav uint8_t *buf, *end; 1196265634Smav 1197265634Smav DPRINTF("entered\n"); 1198265634Smav 1199268150Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1200265634Smav softc = be_lun->softc; 1201268151Smav lbalen = ARGS(beio->io); 1202265634Smav 1203272632Smav if (lbalen->flags & ~(SWS_LBDATA | SWS_UNMAP | SWS_ANCHOR | SWS_NDOB) || 1204270108Smav (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR) && be_lun->unmap == NULL)) { 1205265634Smav ctl_free_beio(beio); 1206265634Smav ctl_set_invalid_field(&io->scsiio, 1207265634Smav /*sks_valid*/ 1, 1208265634Smav /*command*/ 1, 1209265634Smav /*field*/ 1, 1210265634Smav /*bit_valid*/ 0, 1211265634Smav /*bit*/ 0); 1212265634Smav ctl_config_write_done(io); 1213265634Smav return; 1214265634Smav } 1215265634Smav 1216265634Smav switch (io->scsiio.tag_type) { 1217265634Smav case CTL_TAG_ORDERED: 1218265634Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1219265634Smav break; 1220265634Smav case CTL_TAG_HEAD_OF_QUEUE: 1221265634Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1222265634Smav break; 1223265634Smav case CTL_TAG_UNTAGGED: 1224265634Smav case CTL_TAG_SIMPLE: 1225265634Smav case CTL_TAG_ACA: 1226265634Smav default: 1227265634Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1228265634Smav break; 1229265634Smav } 1230265634Smav 1231270108Smav if (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR)) { 1232268149Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1233268149Smav beio->io_len = (uint64_t)lbalen->len * be_lun->blocksize; 1234265634Smav beio->bio_cmd = BIO_DELETE; 1235265634Smav beio->ds_trans_type = DEVSTAT_FREE; 1236265634Smav 1237265634Smav be_lun->unmap(be_lun, beio); 1238265634Smav return; 1239265634Smav } 1240265634Smav 1241265634Smav beio->bio_cmd = BIO_WRITE; 1242265634Smav beio->ds_trans_type = DEVSTAT_WRITE; 1243265634Smav 1244265634Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1245268149Smav (uintmax_t)lbalen->lba, lbalen->len); 1246265634Smav 1247268149Smav len_left = (uint64_t)lbalen->len * be_lun->blocksize; 1248265634Smav for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) { 1249265634Smav 1250265634Smav /* 1251265634Smav * Setup the S/G entry for this chunk. 1252265634Smav */ 1253265642Smav seglen = MIN(CTLBLK_MAX_SEG, len_left); 1254265634Smav seglen -= seglen % be_lun->blocksize; 1255265634Smav beio->sg_segs[i].len = seglen; 1256265634Smav beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1257265634Smav 1258265634Smav DPRINTF("segment %d addr %p len %zd\n", i, 1259265634Smav beio->sg_segs[i].addr, beio->sg_segs[i].len); 1260265634Smav 1261265634Smav beio->num_segs++; 1262265634Smav len_left -= seglen; 1263265634Smav 1264265634Smav buf = beio->sg_segs[i].addr; 1265265634Smav end = buf + seglen; 1266265634Smav for (; buf < end; buf += be_lun->blocksize) { 1267265634Smav memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize); 1268268149Smav if (lbalen->flags & SWS_LBDATA) 1269268149Smav scsi_ulto4b(lbalen->lba + lba, buf); 1270265634Smav lba++; 1271265634Smav } 1272265634Smav } 1273265634Smav 1274268149Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1275265634Smav beio->io_len = lba * be_lun->blocksize; 1276265634Smav 1277265634Smav /* We can not do all in one run. Correct and schedule rerun. */ 1278265634Smav if (len_left > 0) { 1279268149Smav lbalen->lba += lba; 1280268149Smav lbalen->len -= lba; 1281265634Smav beio->beio_cont = ctl_be_block_cw_done_ws; 1282265634Smav } 1283265634Smav 1284265634Smav be_lun->dispatch(be_lun, beio); 1285265634Smav} 1286265634Smav 1287265634Smavstatic void 1288265634Smavctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun, 1289265634Smav union ctl_io *io) 1290265634Smav{ 1291265634Smav struct ctl_be_block_io *beio; 1292265634Smav struct ctl_be_block_softc *softc; 1293268149Smav struct ctl_ptr_len_flags *ptrlen; 1294265634Smav 1295265634Smav DPRINTF("entered\n"); 1296265634Smav 1297268150Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1298265634Smav softc = be_lun->softc; 1299268149Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1300265634Smav 1301270108Smav if ((ptrlen->flags & ~SU_ANCHOR) != 0 || be_lun->unmap == NULL) { 1302265634Smav ctl_free_beio(beio); 1303265634Smav ctl_set_invalid_field(&io->scsiio, 1304265634Smav /*sks_valid*/ 0, 1305265634Smav /*command*/ 1, 1306265634Smav /*field*/ 0, 1307265634Smav /*bit_valid*/ 0, 1308265634Smav /*bit*/ 0); 1309265634Smav ctl_config_write_done(io); 1310265634Smav return; 1311265634Smav } 1312265634Smav 1313265634Smav switch (io->scsiio.tag_type) { 1314265634Smav case CTL_TAG_ORDERED: 1315265634Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1316265634Smav break; 1317265634Smav case CTL_TAG_HEAD_OF_QUEUE: 1318265634Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1319265634Smav break; 1320265634Smav case CTL_TAG_UNTAGGED: 1321265634Smav case CTL_TAG_SIMPLE: 1322265634Smav case CTL_TAG_ACA: 1323265634Smav default: 1324265634Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1325265634Smav break; 1326265634Smav } 1327265634Smav 1328265634Smav beio->io_len = 0; 1329265634Smav beio->io_offset = -1; 1330265634Smav 1331265634Smav beio->bio_cmd = BIO_DELETE; 1332265634Smav beio->ds_trans_type = DEVSTAT_FREE; 1333265634Smav 1334268149Smav DPRINTF("UNMAP\n"); 1335265634Smav 1336265634Smav be_lun->unmap(be_lun, beio); 1337265634Smav} 1338265634Smav 1339265634Smavstatic void 1340275892Smavctl_be_block_cr_done(struct ctl_be_block_io *beio) 1341275892Smav{ 1342275892Smav union ctl_io *io; 1343275892Smav 1344275892Smav io = beio->io; 1345275892Smav ctl_free_beio(beio); 1346275892Smav ctl_config_read_done(io); 1347275892Smav} 1348275892Smav 1349275892Smavstatic void 1350275892Smavctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 1351275892Smav union ctl_io *io) 1352275892Smav{ 1353275892Smav struct ctl_be_block_io *beio; 1354275892Smav struct ctl_be_block_softc *softc; 1355275892Smav 1356275892Smav DPRINTF("entered\n"); 1357275892Smav 1358275892Smav softc = be_lun->softc; 1359275892Smav beio = ctl_alloc_beio(softc); 1360275892Smav beio->io = io; 1361275892Smav beio->lun = be_lun; 1362275892Smav beio->beio_cont = ctl_be_block_cr_done; 1363275892Smav PRIV(io)->ptr = (void *)beio; 1364275892Smav 1365275892Smav switch (io->scsiio.cdb[0]) { 1366275892Smav case SERVICE_ACTION_IN: /* GET LBA STATUS */ 1367275892Smav beio->bio_cmd = -1; 1368275892Smav beio->ds_trans_type = DEVSTAT_NO_DATA; 1369275892Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1370275892Smav beio->io_len = 0; 1371275892Smav if (be_lun->get_lba_status) 1372275892Smav be_lun->get_lba_status(be_lun, beio); 1373275892Smav else 1374275892Smav ctl_be_block_cr_done(beio); 1375275892Smav break; 1376275892Smav default: 1377275892Smav panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1378275892Smav break; 1379275892Smav } 1380275892Smav} 1381275892Smav 1382275892Smavstatic void 1383265634Smavctl_be_block_cw_done(struct ctl_be_block_io *beio) 1384265634Smav{ 1385265634Smav union ctl_io *io; 1386265634Smav 1387265634Smav io = beio->io; 1388265634Smav ctl_free_beio(beio); 1389265634Smav ctl_config_write_done(io); 1390265634Smav} 1391265634Smav 1392265634Smavstatic void 1393229997Skenctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 1394229997Sken union ctl_io *io) 1395229997Sken{ 1396229997Sken struct ctl_be_block_io *beio; 1397229997Sken struct ctl_be_block_softc *softc; 1398229997Sken 1399229997Sken DPRINTF("entered\n"); 1400229997Sken 1401229997Sken softc = be_lun->softc; 1402229997Sken beio = ctl_alloc_beio(softc); 1403229997Sken beio->io = io; 1404229997Sken beio->lun = be_lun; 1405265634Smav beio->beio_cont = ctl_be_block_cw_done; 1406268150Smav PRIV(io)->ptr = (void *)beio; 1407229997Sken 1408229997Sken switch (io->scsiio.cdb[0]) { 1409229997Sken case SYNCHRONIZE_CACHE: 1410229997Sken case SYNCHRONIZE_CACHE_16: 1411249194Strasz beio->bio_cmd = BIO_FLUSH; 1412229997Sken beio->ds_trans_type = DEVSTAT_NO_DATA; 1413229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1414229997Sken beio->io_len = 0; 1415229997Sken be_lun->lun_flush(be_lun, beio); 1416229997Sken break; 1417265634Smav case WRITE_SAME_10: 1418265634Smav case WRITE_SAME_16: 1419265634Smav ctl_be_block_cw_dispatch_ws(be_lun, io); 1420265634Smav break; 1421265634Smav case UNMAP: 1422265634Smav ctl_be_block_cw_dispatch_unmap(be_lun, io); 1423265634Smav break; 1424229997Sken default: 1425229997Sken panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1426229997Sken break; 1427229997Sken } 1428229997Sken} 1429229997Sken 1430260817SavgSDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t"); 1431260817SavgSDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t"); 1432260817SavgSDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t"); 1433260817SavgSDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t"); 1434229997Sken 1435229997Skenstatic void 1436265642Smavctl_be_block_next(struct ctl_be_block_io *beio) 1437265642Smav{ 1438265642Smav struct ctl_be_block_lun *be_lun; 1439265642Smav union ctl_io *io; 1440265642Smav 1441265642Smav io = beio->io; 1442265642Smav be_lun = beio->lun; 1443265642Smav ctl_free_beio(beio); 1444268261Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1445268261Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1446268261Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1447268151Smav ctl_data_submit_done(io); 1448265642Smav return; 1449265642Smav } 1450265642Smav 1451265642Smav io->io_hdr.status &= ~CTL_STATUS_MASK; 1452265642Smav io->io_hdr.status |= CTL_STATUS_NONE; 1453265642Smav 1454268549Smav mtx_lock(&be_lun->queue_lock); 1455265642Smav /* 1456265642Smav * XXX KDM make sure that links is okay to use at this point. 1457265642Smav * Otherwise, we either need to add another field to ctl_io_hdr, 1458265642Smav * or deal with resource allocation here. 1459265642Smav */ 1460265642Smav STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1461268549Smav mtx_unlock(&be_lun->queue_lock); 1462265642Smav 1463265642Smav taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1464265642Smav} 1465265642Smav 1466265642Smavstatic void 1467229997Skenctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 1468229997Sken union ctl_io *io) 1469229997Sken{ 1470229997Sken struct ctl_be_block_io *beio; 1471229997Sken struct ctl_be_block_softc *softc; 1472268151Smav struct ctl_lba_len_flags *lbalen; 1473268150Smav struct ctl_ptr_len_flags *bptrlen; 1474268150Smav uint64_t len_left, lbas; 1475229997Sken int i; 1476229997Sken 1477229997Sken softc = be_lun->softc; 1478229997Sken 1479229997Sken DPRINTF("entered\n"); 1480229997Sken 1481268151Smav lbalen = ARGS(io); 1482268151Smav if (lbalen->flags & CTL_LLF_WRITE) { 1483268151Smav SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0); 1484268151Smav } else { 1485229997Sken SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0); 1486229997Sken } 1487229997Sken 1488229997Sken beio = ctl_alloc_beio(softc); 1489229997Sken beio->io = io; 1490229997Sken beio->lun = be_lun; 1491268150Smav bptrlen = PRIV(io); 1492268150Smav bptrlen->ptr = (void *)beio; 1493229997Sken 1494229997Sken switch (io->scsiio.tag_type) { 1495229997Sken case CTL_TAG_ORDERED: 1496229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1497229997Sken break; 1498229997Sken case CTL_TAG_HEAD_OF_QUEUE: 1499229997Sken beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1500229997Sken break; 1501229997Sken case CTL_TAG_UNTAGGED: 1502229997Sken case CTL_TAG_SIMPLE: 1503229997Sken case CTL_TAG_ACA: 1504229997Sken default: 1505229997Sken beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1506229997Sken break; 1507229997Sken } 1508229997Sken 1509268151Smav if (lbalen->flags & CTL_LLF_WRITE) { 1510268151Smav beio->bio_cmd = BIO_WRITE; 1511268151Smav beio->ds_trans_type = DEVSTAT_WRITE; 1512268151Smav } else { 1513229997Sken beio->bio_cmd = BIO_READ; 1514229997Sken beio->ds_trans_type = DEVSTAT_READ; 1515229997Sken } 1516229997Sken 1517265642Smav DPRINTF("%s at LBA %jx len %u @%ju\n", 1518229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", 1519268150Smav (uintmax_t)lbalen->lba, lbalen->len, bptrlen->len); 1520268151Smav if (lbalen->flags & CTL_LLF_COMPARE) 1521268151Smav lbas = CTLBLK_HALF_IO_SIZE; 1522268151Smav else 1523268151Smav lbas = CTLBLK_MAX_IO_SIZE; 1524268151Smav lbas = MIN(lbalen->len - bptrlen->len, lbas / be_lun->blocksize); 1525268150Smav beio->io_offset = (lbalen->lba + bptrlen->len) * be_lun->blocksize; 1526268150Smav beio->io_len = lbas * be_lun->blocksize; 1527268150Smav bptrlen->len += lbas; 1528229997Sken 1529265642Smav for (i = 0, len_left = beio->io_len; len_left > 0; i++) { 1530265642Smav KASSERT(i < CTLBLK_MAX_SEGS, ("Too many segs (%d >= %d)", 1531265642Smav i, CTLBLK_MAX_SEGS)); 1532229997Sken 1533229997Sken /* 1534229997Sken * Setup the S/G entry for this chunk. 1535229997Sken */ 1536265642Smav beio->sg_segs[i].len = min(CTLBLK_MAX_SEG, len_left); 1537229997Sken beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1538229997Sken 1539229997Sken DPRINTF("segment %d addr %p len %zd\n", i, 1540229997Sken beio->sg_segs[i].addr, beio->sg_segs[i].len); 1541229997Sken 1542268151Smav /* Set up second segment for compare operation. */ 1543268151Smav if (lbalen->flags & CTL_LLF_COMPARE) { 1544268151Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].len = 1545268151Smav beio->sg_segs[i].len; 1546268151Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = 1547268151Smav uma_zalloc(be_lun->lun_zone, M_WAITOK); 1548268151Smav } 1549268151Smav 1550229997Sken beio->num_segs++; 1551229997Sken len_left -= beio->sg_segs[i].len; 1552229997Sken } 1553268150Smav if (bptrlen->len < lbalen->len) 1554265642Smav beio->beio_cont = ctl_be_block_next; 1555265642Smav io->scsiio.be_move_done = ctl_be_block_move_done; 1556268151Smav /* For compare we have separate S/G lists for read and datamove. */ 1557268151Smav if (lbalen->flags & CTL_LLF_COMPARE) 1558268151Smav io->scsiio.kern_data_ptr = (uint8_t *)&beio->sg_segs[CTLBLK_HALF_SEGS]; 1559268151Smav else 1560268151Smav io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 1561265642Smav io->scsiio.kern_data_len = beio->io_len; 1562265642Smav io->scsiio.kern_data_resid = 0; 1563265642Smav io->scsiio.kern_sg_entries = beio->num_segs; 1564265642Smav io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 1565229997Sken 1566229997Sken /* 1567229997Sken * For the read case, we need to read the data into our buffers and 1568229997Sken * then we can send it back to the user. For the write case, we 1569229997Sken * need to get the data from the user first. 1570229997Sken */ 1571229997Sken if (beio->bio_cmd == BIO_READ) { 1572229997Sken SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0); 1573229997Sken be_lun->dispatch(be_lun, beio); 1574229997Sken } else { 1575229997Sken SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0); 1576229997Sken#ifdef CTL_TIME_IO 1577229997Sken getbintime(&io->io_hdr.dma_start_bt); 1578229997Sken#endif 1579229997Sken ctl_datamove(io); 1580229997Sken } 1581229997Sken} 1582229997Sken 1583229997Skenstatic void 1584229997Skenctl_be_block_worker(void *context, int pending) 1585229997Sken{ 1586229997Sken struct ctl_be_block_lun *be_lun; 1587229997Sken struct ctl_be_block_softc *softc; 1588229997Sken union ctl_io *io; 1589229997Sken 1590229997Sken be_lun = (struct ctl_be_block_lun *)context; 1591229997Sken softc = be_lun->softc; 1592229997Sken 1593229997Sken DPRINTF("entered\n"); 1594229997Sken 1595268549Smav mtx_lock(&be_lun->queue_lock); 1596229997Sken for (;;) { 1597229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue); 1598229997Sken if (io != NULL) { 1599229997Sken struct ctl_be_block_io *beio; 1600229997Sken 1601229997Sken DPRINTF("datamove queue\n"); 1602229997Sken 1603229997Sken STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr, 1604229997Sken ctl_io_hdr, links); 1605229997Sken 1606268549Smav mtx_unlock(&be_lun->queue_lock); 1607229997Sken 1608268150Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1609229997Sken 1610229997Sken be_lun->dispatch(be_lun, beio); 1611229997Sken 1612268549Smav mtx_lock(&be_lun->queue_lock); 1613229997Sken continue; 1614229997Sken } 1615229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue); 1616229997Sken if (io != NULL) { 1617229997Sken DPRINTF("config write queue\n"); 1618229997Sken STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr, 1619229997Sken ctl_io_hdr, links); 1620268549Smav mtx_unlock(&be_lun->queue_lock); 1621229997Sken ctl_be_block_cw_dispatch(be_lun, io); 1622268549Smav mtx_lock(&be_lun->queue_lock); 1623229997Sken continue; 1624229997Sken } 1625275892Smav io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_read_queue); 1626275892Smav if (io != NULL) { 1627275892Smav DPRINTF("config read queue\n"); 1628275892Smav STAILQ_REMOVE(&be_lun->config_read_queue, &io->io_hdr, 1629275892Smav ctl_io_hdr, links); 1630275892Smav mtx_unlock(&be_lun->queue_lock); 1631275892Smav ctl_be_block_cr_dispatch(be_lun, io); 1632275892Smav mtx_lock(&be_lun->queue_lock); 1633275892Smav continue; 1634275892Smav } 1635229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue); 1636229997Sken if (io != NULL) { 1637229997Sken DPRINTF("input queue\n"); 1638229997Sken 1639229997Sken STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr, 1640229997Sken ctl_io_hdr, links); 1641268549Smav mtx_unlock(&be_lun->queue_lock); 1642229997Sken 1643229997Sken /* 1644229997Sken * We must drop the lock, since this routine and 1645229997Sken * its children may sleep. 1646229997Sken */ 1647229997Sken ctl_be_block_dispatch(be_lun, io); 1648229997Sken 1649268549Smav mtx_lock(&be_lun->queue_lock); 1650229997Sken continue; 1651229997Sken } 1652229997Sken 1653229997Sken /* 1654229997Sken * If we get here, there is no work left in the queues, so 1655229997Sken * just break out and let the task queue go to sleep. 1656229997Sken */ 1657229997Sken break; 1658229997Sken } 1659268549Smav mtx_unlock(&be_lun->queue_lock); 1660229997Sken} 1661229997Sken 1662229997Sken/* 1663229997Sken * Entry point from CTL to the backend for I/O. We queue everything to a 1664229997Sken * work thread, so this just puts the I/O on a queue and wakes up the 1665229997Sken * thread. 1666229997Sken */ 1667229997Skenstatic int 1668229997Skenctl_be_block_submit(union ctl_io *io) 1669229997Sken{ 1670229997Sken struct ctl_be_block_lun *be_lun; 1671229997Sken struct ctl_be_lun *ctl_be_lun; 1672229997Sken 1673229997Sken DPRINTF("entered\n"); 1674229997Sken 1675229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 1676229997Sken CTL_PRIV_BACKEND_LUN].ptr; 1677229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 1678229997Sken 1679229997Sken /* 1680229997Sken * Make sure we only get SCSI I/O. 1681229997Sken */ 1682229997Sken KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type " 1683229997Sken "%#x) encountered", io->io_hdr.io_type)); 1684229997Sken 1685268150Smav PRIV(io)->len = 0; 1686268150Smav 1687268549Smav mtx_lock(&be_lun->queue_lock); 1688229997Sken /* 1689229997Sken * XXX KDM make sure that links is okay to use at this point. 1690229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 1691229997Sken * or deal with resource allocation here. 1692229997Sken */ 1693229997Sken STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1694268549Smav mtx_unlock(&be_lun->queue_lock); 1695229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1696229997Sken 1697268148Smav return (CTL_RETVAL_COMPLETE); 1698229997Sken} 1699229997Sken 1700229997Skenstatic int 1701229997Skenctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 1702229997Sken int flag, struct thread *td) 1703229997Sken{ 1704229997Sken struct ctl_be_block_softc *softc; 1705229997Sken int error; 1706229997Sken 1707229997Sken softc = &backend_block_softc; 1708229997Sken 1709229997Sken error = 0; 1710229997Sken 1711229997Sken switch (cmd) { 1712229997Sken case CTL_LUN_REQ: { 1713229997Sken struct ctl_lun_req *lun_req; 1714229997Sken 1715229997Sken lun_req = (struct ctl_lun_req *)addr; 1716229997Sken 1717229997Sken switch (lun_req->reqtype) { 1718229997Sken case CTL_LUNREQ_CREATE: 1719229997Sken error = ctl_be_block_create(softc, lun_req); 1720229997Sken break; 1721229997Sken case CTL_LUNREQ_RM: 1722229997Sken error = ctl_be_block_rm(softc, lun_req); 1723229997Sken break; 1724232604Strasz case CTL_LUNREQ_MODIFY: 1725232604Strasz error = ctl_be_block_modify(softc, lun_req); 1726232604Strasz break; 1727229997Sken default: 1728229997Sken lun_req->status = CTL_LUN_ERROR; 1729229997Sken snprintf(lun_req->error_str, sizeof(lun_req->error_str), 1730273315Smav "invalid LUN request type %d", 1731229997Sken lun_req->reqtype); 1732229997Sken break; 1733229997Sken } 1734229997Sken break; 1735229997Sken } 1736229997Sken default: 1737229997Sken error = ENOTTY; 1738229997Sken break; 1739229997Sken } 1740229997Sken 1741229997Sken return (error); 1742229997Sken} 1743229997Sken 1744229997Skenstatic int 1745229997Skenctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1746229997Sken{ 1747229997Sken struct ctl_be_block_filedata *file_data; 1748229997Sken struct ctl_lun_create_params *params; 1749276179Smav char *value; 1750229997Sken struct vattr vattr; 1751276179Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1752229997Sken int error; 1753229997Sken 1754229997Sken error = 0; 1755229997Sken file_data = &be_lun->backend.file; 1756273315Smav params = &be_lun->params; 1757229997Sken 1758229997Sken be_lun->dev_type = CTL_BE_BLOCK_FILE; 1759229997Sken be_lun->dispatch = ctl_be_block_dispatch_file; 1760229997Sken be_lun->lun_flush = ctl_be_block_flush_file; 1761275892Smav be_lun->get_lba_status = ctl_be_block_gls_file; 1762275893Smav be_lun->getattr = ctl_be_block_getattr_file; 1763229997Sken 1764229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 1765229997Sken if (error != 0) { 1766229997Sken snprintf(req->error_str, sizeof(req->error_str), 1767229997Sken "error calling VOP_GETATTR() for file %s", 1768229997Sken be_lun->dev_path); 1769229997Sken return (error); 1770229997Sken } 1771229997Sken 1772229997Sken /* 1773229997Sken * Verify that we have the ability to upgrade to exclusive 1774229997Sken * access on this file so we can trap errors at open instead 1775229997Sken * of reporting them during first access. 1776229997Sken */ 1777229997Sken if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) { 1778229997Sken vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY); 1779229997Sken if (be_lun->vn->v_iflag & VI_DOOMED) { 1780229997Sken error = EBADF; 1781229997Sken snprintf(req->error_str, sizeof(req->error_str), 1782229997Sken "error locking file %s", be_lun->dev_path); 1783229997Sken return (error); 1784229997Sken } 1785229997Sken } 1786229997Sken 1787229997Sken 1788229997Sken file_data->cred = crhold(curthread->td_ucred); 1789232604Strasz if (params->lun_size_bytes != 0) 1790232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1791232604Strasz else 1792232604Strasz be_lun->size_bytes = vattr.va_size; 1793229997Sken /* 1794229997Sken * We set the multi thread flag for file operations because all 1795229997Sken * filesystems (in theory) are capable of allowing multiple readers 1796229997Sken * of a file at once. So we want to get the maximum possible 1797229997Sken * concurrency. 1798229997Sken */ 1799229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD; 1800229997Sken 1801229997Sken /* 1802273322Smav * For files we can use any logical block size. Prefer 512 bytes 1803273322Smav * for compatibility reasons. If file's vattr.va_blocksize 1804273322Smav * (preferred I/O block size) is bigger and multiple to chosen 1805273322Smav * logical block size -- report it as physical block size. 1806229997Sken */ 1807229997Sken if (params->blocksize_bytes != 0) 1808229997Sken be_lun->blocksize = params->blocksize_bytes; 1809229997Sken else 1810229997Sken be_lun->blocksize = 512; 1811276179Smav 1812276179Smav us = ps = vattr.va_blocksize; 1813276179Smav uo = po = 0; 1814276179Smav 1815276179Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1816276179Smav if (value != NULL) 1817276179Smav ctl_expand_number(value, &ps); 1818276179Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1819276179Smav if (value != NULL) 1820276179Smav ctl_expand_number(value, &po); 1821276179Smav pss = ps / be_lun->blocksize; 1822276179Smav pos = po / be_lun->blocksize; 1823276179Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1824276179Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1825273322Smav be_lun->pblockexp = fls(pss) - 1; 1826276179Smav be_lun->pblockoff = (pss - pos) % pss; 1827273322Smav } 1828229997Sken 1829276179Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 1830276179Smav if (value != NULL) 1831276179Smav ctl_expand_number(value, &us); 1832276179Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 1833276179Smav if (value != NULL) 1834276179Smav ctl_expand_number(value, &uo); 1835276179Smav uss = us / be_lun->blocksize; 1836276179Smav uos = uo / be_lun->blocksize; 1837276179Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 1838276179Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 1839276179Smav be_lun->ublockexp = fls(uss) - 1; 1840276179Smav be_lun->ublockoff = (uss - uos) % uss; 1841276179Smav } 1842276179Smav 1843229997Sken /* 1844229997Sken * Sanity check. The media size has to be at least one 1845229997Sken * sector long. 1846229997Sken */ 1847229997Sken if (be_lun->size_bytes < be_lun->blocksize) { 1848229997Sken error = EINVAL; 1849229997Sken snprintf(req->error_str, sizeof(req->error_str), 1850229997Sken "file %s size %ju < block size %u", be_lun->dev_path, 1851229997Sken (uintmax_t)be_lun->size_bytes, be_lun->blocksize); 1852229997Sken } 1853276237Smav 1854276237Smav be_lun->opttxferlen = CTLBLK_MAX_IO_SIZE / be_lun->blocksize; 1855229997Sken return (error); 1856229997Sken} 1857229997Sken 1858229997Skenstatic int 1859229997Skenctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1860229997Sken{ 1861229997Sken struct ctl_lun_create_params *params; 1862229997Sken struct vattr vattr; 1863229997Sken struct cdev *dev; 1864229997Sken struct cdevsw *devsw; 1865276179Smav char *value; 1866276237Smav int error, atomic, maxio; 1867276179Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1868229997Sken 1869273315Smav params = &be_lun->params; 1870229997Sken 1871229997Sken be_lun->dev_type = CTL_BE_BLOCK_DEV; 1872229997Sken be_lun->backend.dev.cdev = be_lun->vn->v_rdev; 1873229997Sken be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev, 1874229997Sken &be_lun->backend.dev.dev_ref); 1875229997Sken if (be_lun->backend.dev.csw == NULL) 1876229997Sken panic("Unable to retrieve device switch"); 1877275892Smav if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) { 1878269429Smav be_lun->dispatch = ctl_be_block_dispatch_zvol; 1879275892Smav be_lun->get_lba_status = ctl_be_block_gls_zvol; 1880276237Smav atomic = maxio = CTLBLK_MAX_IO_SIZE; 1881276237Smav } else { 1882269429Smav be_lun->dispatch = ctl_be_block_dispatch_dev; 1883276237Smav atomic = 0; 1884276237Smav maxio = be_lun->backend.dev.cdev->si_iosize_max; 1885276237Smav if (maxio <= 0) 1886276237Smav maxio = DFLTPHYS; 1887276237Smav if (maxio > CTLBLK_MAX_IO_SIZE) 1888276237Smav maxio = CTLBLK_MAX_IO_SIZE; 1889276237Smav } 1890269429Smav be_lun->lun_flush = ctl_be_block_flush_dev; 1891269429Smav be_lun->unmap = ctl_be_block_unmap_dev; 1892274732Smav be_lun->getattr = ctl_be_block_getattr_dev; 1893229997Sken 1894229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED); 1895229997Sken if (error) { 1896229997Sken snprintf(req->error_str, sizeof(req->error_str), 1897273315Smav "error getting vnode attributes for device %s", 1898273315Smav be_lun->dev_path); 1899229997Sken return (error); 1900229997Sken } 1901229997Sken 1902229997Sken dev = be_lun->vn->v_rdev; 1903229997Sken devsw = dev->si_devsw; 1904229997Sken if (!devsw->d_ioctl) { 1905229997Sken snprintf(req->error_str, sizeof(req->error_str), 1906273315Smav "no d_ioctl for device %s!", 1907229997Sken be_lun->dev_path); 1908229997Sken return (ENODEV); 1909229997Sken } 1910229997Sken 1911229997Sken error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, 1912229997Sken (caddr_t)&be_lun->blocksize, FREAD, 1913229997Sken curthread); 1914229997Sken if (error) { 1915229997Sken snprintf(req->error_str, sizeof(req->error_str), 1916273315Smav "error %d returned for DIOCGSECTORSIZE ioctl " 1917273315Smav "on %s!", error, be_lun->dev_path); 1918229997Sken return (error); 1919229997Sken } 1920229997Sken 1921229997Sken /* 1922229997Sken * If the user has asked for a blocksize that is greater than the 1923229997Sken * backing device's blocksize, we can do it only if the blocksize 1924229997Sken * the user is asking for is an even multiple of the underlying 1925229997Sken * device's blocksize. 1926229997Sken */ 1927229997Sken if ((params->blocksize_bytes != 0) 1928229997Sken && (params->blocksize_bytes > be_lun->blocksize)) { 1929229997Sken uint32_t bs_multiple, tmp_blocksize; 1930229997Sken 1931229997Sken bs_multiple = params->blocksize_bytes / be_lun->blocksize; 1932229997Sken 1933229997Sken tmp_blocksize = bs_multiple * be_lun->blocksize; 1934229997Sken 1935229997Sken if (tmp_blocksize == params->blocksize_bytes) { 1936229997Sken be_lun->blocksize = params->blocksize_bytes; 1937229997Sken } else { 1938229997Sken snprintf(req->error_str, sizeof(req->error_str), 1939273315Smav "requested blocksize %u is not an even " 1940229997Sken "multiple of backing device blocksize %u", 1941273315Smav params->blocksize_bytes, 1942229997Sken be_lun->blocksize); 1943229997Sken return (EINVAL); 1944229997Sken 1945229997Sken } 1946229997Sken } else if ((params->blocksize_bytes != 0) 1947229997Sken && (params->blocksize_bytes != be_lun->blocksize)) { 1948229997Sken snprintf(req->error_str, sizeof(req->error_str), 1949273315Smav "requested blocksize %u < backing device " 1950273315Smav "blocksize %u", params->blocksize_bytes, 1951229997Sken be_lun->blocksize); 1952229997Sken return (EINVAL); 1953229997Sken } 1954229997Sken 1955229997Sken error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 1956229997Sken (caddr_t)&be_lun->size_bytes, FREAD, 1957229997Sken curthread); 1958229997Sken if (error) { 1959229997Sken snprintf(req->error_str, sizeof(req->error_str), 1960273315Smav "error %d returned for DIOCGMEDIASIZE " 1961273315Smav " ioctl on %s!", error, 1962232604Strasz be_lun->dev_path); 1963229997Sken return (error); 1964229997Sken } 1965229997Sken 1966232604Strasz if (params->lun_size_bytes != 0) { 1967232604Strasz if (params->lun_size_bytes > be_lun->size_bytes) { 1968232604Strasz snprintf(req->error_str, sizeof(req->error_str), 1969273315Smav "requested LUN size %ju > backing device " 1970273315Smav "size %ju", 1971232604Strasz (uintmax_t)params->lun_size_bytes, 1972232604Strasz (uintmax_t)be_lun->size_bytes); 1973232604Strasz return (EINVAL); 1974232604Strasz } 1975232604Strasz 1976232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1977232604Strasz } 1978232604Strasz 1979264727Smav error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE, 1980264727Smav (caddr_t)&ps, FREAD, curthread); 1981264727Smav if (error) 1982264727Smav ps = po = 0; 1983264727Smav else { 1984264727Smav error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET, 1985264727Smav (caddr_t)&po, FREAD, curthread); 1986264727Smav if (error) 1987264727Smav po = 0; 1988264727Smav } 1989276179Smav us = ps; 1990276179Smav uo = po; 1991276179Smav 1992276179Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1993276179Smav if (value != NULL) 1994276179Smav ctl_expand_number(value, &ps); 1995276179Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1996276179Smav if (value != NULL) 1997276179Smav ctl_expand_number(value, &po); 1998264727Smav pss = ps / be_lun->blocksize; 1999264727Smav pos = po / be_lun->blocksize; 2000264727Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 2001264727Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 2002264727Smav be_lun->pblockexp = fls(pss) - 1; 2003264727Smav be_lun->pblockoff = (pss - pos) % pss; 2004264727Smav } 2005264727Smav 2006276179Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 2007276179Smav if (value != NULL) 2008276179Smav ctl_expand_number(value, &us); 2009276179Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 2010276179Smav if (value != NULL) 2011276179Smav ctl_expand_number(value, &uo); 2012276179Smav uss = us / be_lun->blocksize; 2013276179Smav uos = uo / be_lun->blocksize; 2014276179Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 2015276179Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 2016276179Smav be_lun->ublockexp = fls(uss) - 1; 2017276179Smav be_lun->ublockoff = (uss - uos) % uss; 2018276179Smav } 2019276179Smav 2020276237Smav be_lun->atomicblock = atomic / be_lun->blocksize; 2021276237Smav be_lun->opttxferlen = maxio / be_lun->blocksize; 2022229997Sken return (0); 2023229997Sken} 2024229997Sken 2025229997Skenstatic int 2026229997Skenctl_be_block_close(struct ctl_be_block_lun *be_lun) 2027229997Sken{ 2028229997Sken DROP_GIANT(); 2029229997Sken if (be_lun->vn) { 2030229997Sken int flags = FREAD | FWRITE; 2031229997Sken 2032229997Sken switch (be_lun->dev_type) { 2033229997Sken case CTL_BE_BLOCK_DEV: 2034229997Sken if (be_lun->backend.dev.csw) { 2035229997Sken dev_relthread(be_lun->backend.dev.cdev, 2036229997Sken be_lun->backend.dev.dev_ref); 2037229997Sken be_lun->backend.dev.csw = NULL; 2038229997Sken be_lun->backend.dev.cdev = NULL; 2039229997Sken } 2040229997Sken break; 2041229997Sken case CTL_BE_BLOCK_FILE: 2042229997Sken break; 2043229997Sken case CTL_BE_BLOCK_NONE: 2044259304Strasz break; 2045229997Sken default: 2046229997Sken panic("Unexpected backend type."); 2047229997Sken break; 2048229997Sken } 2049229997Sken 2050229997Sken (void)vn_close(be_lun->vn, flags, NOCRED, curthread); 2051229997Sken be_lun->vn = NULL; 2052229997Sken 2053229997Sken switch (be_lun->dev_type) { 2054229997Sken case CTL_BE_BLOCK_DEV: 2055229997Sken break; 2056229997Sken case CTL_BE_BLOCK_FILE: 2057229997Sken if (be_lun->backend.file.cred != NULL) { 2058229997Sken crfree(be_lun->backend.file.cred); 2059229997Sken be_lun->backend.file.cred = NULL; 2060229997Sken } 2061229997Sken break; 2062229997Sken case CTL_BE_BLOCK_NONE: 2063259304Strasz break; 2064229997Sken default: 2065229997Sken panic("Unexpected backend type."); 2066229997Sken break; 2067229997Sken } 2068273315Smav be_lun->dev_type = CTL_BE_BLOCK_NONE; 2069229997Sken } 2070229997Sken PICKUP_GIANT(); 2071229997Sken 2072229997Sken return (0); 2073229997Sken} 2074229997Sken 2075229997Skenstatic int 2076229997Skenctl_be_block_open(struct ctl_be_block_softc *softc, 2077229997Sken struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 2078229997Sken{ 2079229997Sken struct nameidata nd; 2080229997Sken int flags; 2081229997Sken int error; 2082229997Sken 2083229997Sken /* 2084229997Sken * XXX KDM allow a read-only option? 2085229997Sken */ 2086229997Sken flags = FREAD | FWRITE; 2087229997Sken error = 0; 2088229997Sken 2089229997Sken if (rootvnode == NULL) { 2090229997Sken snprintf(req->error_str, sizeof(req->error_str), 2091273315Smav "Root filesystem is not mounted"); 2092229997Sken return (1); 2093229997Sken } 2094229997Sken 2095229997Sken if (!curthread->td_proc->p_fd->fd_cdir) { 2096229997Sken curthread->td_proc->p_fd->fd_cdir = rootvnode; 2097229997Sken VREF(rootvnode); 2098229997Sken } 2099229997Sken if (!curthread->td_proc->p_fd->fd_rdir) { 2100229997Sken curthread->td_proc->p_fd->fd_rdir = rootvnode; 2101229997Sken VREF(rootvnode); 2102229997Sken } 2103229997Sken if (!curthread->td_proc->p_fd->fd_jdir) { 2104229997Sken curthread->td_proc->p_fd->fd_jdir = rootvnode; 2105229997Sken VREF(rootvnode); 2106229997Sken } 2107229997Sken 2108229997Sken again: 2109229997Sken NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread); 2110229997Sken error = vn_open(&nd, &flags, 0, NULL); 2111229997Sken if (error) { 2112229997Sken /* 2113229997Sken * This is the only reasonable guess we can make as far as 2114229997Sken * path if the user doesn't give us a fully qualified path. 2115229997Sken * If they want to specify a file, they need to specify the 2116229997Sken * full path. 2117229997Sken */ 2118229997Sken if (be_lun->dev_path[0] != '/') { 2119229997Sken char *dev_path = "/dev/"; 2120229997Sken char *dev_name; 2121229997Sken 2122229997Sken /* Try adding device path at beginning of name */ 2123229997Sken dev_name = malloc(strlen(be_lun->dev_path) 2124229997Sken + strlen(dev_path) + 1, 2125229997Sken M_CTLBLK, M_WAITOK); 2126229997Sken if (dev_name) { 2127229997Sken sprintf(dev_name, "%s%s", dev_path, 2128229997Sken be_lun->dev_path); 2129229997Sken free(be_lun->dev_path, M_CTLBLK); 2130229997Sken be_lun->dev_path = dev_name; 2131229997Sken goto again; 2132229997Sken } 2133229997Sken } 2134229997Sken snprintf(req->error_str, sizeof(req->error_str), 2135273315Smav "error opening %s: %d", be_lun->dev_path, error); 2136229997Sken return (error); 2137229997Sken } 2138229997Sken 2139229997Sken NDFREE(&nd, NDF_ONLY_PNBUF); 2140229997Sken 2141229997Sken be_lun->vn = nd.ni_vp; 2142229997Sken 2143229997Sken /* We only support disks and files. */ 2144229997Sken if (vn_isdisk(be_lun->vn, &error)) { 2145229997Sken error = ctl_be_block_open_dev(be_lun, req); 2146229997Sken } else if (be_lun->vn->v_type == VREG) { 2147229997Sken error = ctl_be_block_open_file(be_lun, req); 2148229997Sken } else { 2149229997Sken error = EINVAL; 2150229997Sken snprintf(req->error_str, sizeof(req->error_str), 2151259304Strasz "%s is not a disk or plain file", be_lun->dev_path); 2152229997Sken } 2153229997Sken VOP_UNLOCK(be_lun->vn, 0); 2154229997Sken 2155229997Sken if (error != 0) { 2156229997Sken ctl_be_block_close(be_lun); 2157229997Sken return (error); 2158229997Sken } 2159229997Sken 2160229997Sken be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2161229997Sken be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 2162229997Sken 2163229997Sken return (0); 2164229997Sken} 2165229997Sken 2166229997Skenstatic int 2167229997Skenctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2168229997Sken{ 2169229997Sken struct ctl_be_block_lun *be_lun; 2170229997Sken struct ctl_lun_create_params *params; 2171268143Smav char num_thread_str[16]; 2172229997Sken char tmpstr[32]; 2173268143Smav char *value; 2174265634Smav int retval, num_threads, unmap; 2175268143Smav int tmp_num_threads; 2176229997Sken 2177229997Sken params = &req->reqdata.create; 2178229997Sken retval = 0; 2179273315Smav req->status = CTL_LUN_OK; 2180229997Sken 2181229997Sken num_threads = cbb_num_threads; 2182229997Sken 2183229997Sken be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK); 2184229997Sken 2185273315Smav be_lun->params = req->reqdata.create; 2186229997Sken be_lun->softc = softc; 2187229997Sken STAILQ_INIT(&be_lun->input_queue); 2188275892Smav STAILQ_INIT(&be_lun->config_read_queue); 2189229997Sken STAILQ_INIT(&be_lun->config_write_queue); 2190229997Sken STAILQ_INIT(&be_lun->datamove_queue); 2191229997Sken sprintf(be_lun->lunname, "cblk%d", softc->num_luns); 2192268549Smav mtx_init(&be_lun->io_lock, "cblk io lock", NULL, MTX_DEF); 2193268549Smav mtx_init(&be_lun->queue_lock, "cblk queue lock", NULL, MTX_DEF); 2194268678Smav ctl_init_opts(&be_lun->ctl_be_lun.options, 2195268678Smav req->num_be_args, req->kern_be_args); 2196229997Sken 2197265642Smav be_lun->lun_zone = uma_zcreate(be_lun->lunname, CTLBLK_MAX_SEG, 2198260476Smav NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0); 2199229997Sken 2200229997Sken if (be_lun->lun_zone == NULL) { 2201229997Sken snprintf(req->error_str, sizeof(req->error_str), 2202273315Smav "error allocating UMA zone"); 2203229997Sken goto bailout_error; 2204229997Sken } 2205229997Sken 2206229997Sken if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 2207229997Sken be_lun->ctl_be_lun.lun_type = params->device_type; 2208229997Sken else 2209229997Sken be_lun->ctl_be_lun.lun_type = T_DIRECT; 2210229997Sken 2211229997Sken if (be_lun->ctl_be_lun.lun_type == T_DIRECT) { 2212268678Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "file"); 2213268146Smav if (value == NULL) { 2214229997Sken snprintf(req->error_str, sizeof(req->error_str), 2215273315Smav "no file argument specified"); 2216229997Sken goto bailout_error; 2217229997Sken } 2218268146Smav be_lun->dev_path = strdup(value, M_CTLBLK); 2219273315Smav be_lun->blocksize = 512; 2220273315Smav be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2221229997Sken 2222229997Sken retval = ctl_be_block_open(softc, be_lun, req); 2223229997Sken if (retval != 0) { 2224229997Sken retval = 0; 2225273315Smav req->status = CTL_LUN_WARNING; 2226229997Sken } 2227229997Sken } else { 2228229997Sken /* 2229229997Sken * For processor devices, we don't have any size. 2230229997Sken */ 2231229997Sken be_lun->blocksize = 0; 2232264727Smav be_lun->pblockexp = 0; 2233264727Smav be_lun->pblockoff = 0; 2234276179Smav be_lun->ublockexp = 0; 2235276179Smav be_lun->ublockoff = 0; 2236229997Sken be_lun->size_blocks = 0; 2237229997Sken be_lun->size_bytes = 0; 2238229997Sken be_lun->ctl_be_lun.maxlba = 0; 2239229997Sken 2240229997Sken /* 2241229997Sken * Default to just 1 thread for processor devices. 2242229997Sken */ 2243229997Sken num_threads = 1; 2244229997Sken } 2245229997Sken 2246229997Sken /* 2247229997Sken * XXX This searching loop might be refactored to be combined with 2248229997Sken * the loop above, 2249229997Sken */ 2250268678Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "num_threads"); 2251268143Smav if (value != NULL) { 2252268143Smav tmp_num_threads = strtol(value, NULL, 0); 2253229997Sken 2254268143Smav /* 2255268143Smav * We don't let the user specify less than one 2256268143Smav * thread, but hope he's clueful enough not to 2257268143Smav * specify 1000 threads. 2258268143Smav */ 2259268143Smav if (tmp_num_threads < 1) { 2260268143Smav snprintf(req->error_str, sizeof(req->error_str), 2261273315Smav "invalid number of threads %s", 2262273315Smav num_thread_str); 2263268143Smav goto bailout_error; 2264229997Sken } 2265268143Smav num_threads = tmp_num_threads; 2266229997Sken } 2267274732Smav unmap = (be_lun->dispatch == ctl_be_block_dispatch_zvol); 2268268678Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "unmap"); 2269274732Smav if (value != NULL) 2270274732Smav unmap = (strcmp(value, "on") == 0); 2271229997Sken 2272229997Sken be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED; 2273229997Sken be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY; 2274273315Smav if (be_lun->vn == NULL) 2275273315Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_OFFLINE; 2276265634Smav if (unmap) 2277265634Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 2278275895Smav if (be_lun->dispatch != ctl_be_block_dispatch_dev) 2279275895Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_SERSEQ_READ; 2280229997Sken be_lun->ctl_be_lun.be_lun = be_lun; 2281273315Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2282273315Smav 0 : (be_lun->size_blocks - 1); 2283229997Sken be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2284264727Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2285264727Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2286276179Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2287276179Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2288276237Smav be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock; 2289276237Smav be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen; 2290229997Sken /* Tell the user the blocksize we ended up using */ 2291273315Smav params->lun_size_bytes = be_lun->size_bytes; 2292229997Sken params->blocksize_bytes = be_lun->blocksize; 2293229997Sken if (params->flags & CTL_LUN_FLAG_ID_REQ) { 2294229997Sken be_lun->ctl_be_lun.req_lun_id = params->req_lun_id; 2295229997Sken be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ; 2296229997Sken } else 2297229997Sken be_lun->ctl_be_lun.req_lun_id = 0; 2298229997Sken 2299229997Sken be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown; 2300229997Sken be_lun->ctl_be_lun.lun_config_status = 2301229997Sken ctl_be_block_lun_config_status; 2302229997Sken be_lun->ctl_be_lun.be = &ctl_be_block_driver; 2303229997Sken 2304229997Sken if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 2305229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d", 2306229997Sken softc->num_luns); 2307229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr, 2308276616Smav MIN(sizeof(be_lun->ctl_be_lun.serial_num), 2309229997Sken sizeof(tmpstr))); 2310229997Sken 2311229997Sken /* Tell the user what we used for a serial number */ 2312229997Sken strncpy((char *)params->serial_num, tmpstr, 2313276616Smav MIN(sizeof(params->serial_num), sizeof(tmpstr))); 2314229997Sken } else { 2315229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, 2316229997Sken params->serial_num, 2317276616Smav MIN(sizeof(be_lun->ctl_be_lun.serial_num), 2318229997Sken sizeof(params->serial_num))); 2319229997Sken } 2320229997Sken if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 2321229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns); 2322229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr, 2323276616Smav MIN(sizeof(be_lun->ctl_be_lun.device_id), 2324229997Sken sizeof(tmpstr))); 2325229997Sken 2326229997Sken /* Tell the user what we used for a device ID */ 2327229997Sken strncpy((char *)params->device_id, tmpstr, 2328276616Smav MIN(sizeof(params->device_id), sizeof(tmpstr))); 2329229997Sken } else { 2330229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, 2331229997Sken params->device_id, 2332276616Smav MIN(sizeof(be_lun->ctl_be_lun.device_id), 2333276616Smav sizeof(params->device_id))); 2334229997Sken } 2335229997Sken 2336229997Sken TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun); 2337229997Sken 2338229997Sken be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK, 2339229997Sken taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 2340229997Sken 2341229997Sken if (be_lun->io_taskqueue == NULL) { 2342229997Sken snprintf(req->error_str, sizeof(req->error_str), 2343273315Smav "unable to create taskqueue"); 2344229997Sken goto bailout_error; 2345229997Sken } 2346229997Sken 2347229997Sken /* 2348229997Sken * Note that we start the same number of threads by default for 2349229997Sken * both the file case and the block device case. For the file 2350229997Sken * case, we need multiple threads to allow concurrency, because the 2351229997Sken * vnode interface is designed to be a blocking interface. For the 2352229997Sken * block device case, ZFS zvols at least will block the caller's 2353229997Sken * context in many instances, and so we need multiple threads to 2354229997Sken * overcome that problem. Other block devices don't need as many 2355229997Sken * threads, but they shouldn't cause too many problems. 2356229997Sken * 2357229997Sken * If the user wants to just have a single thread for a block 2358229997Sken * device, he can specify that when the LUN is created, or change 2359229997Sken * the tunable/sysctl to alter the default number of threads. 2360229997Sken */ 2361229997Sken retval = taskqueue_start_threads(&be_lun->io_taskqueue, 2362229997Sken /*num threads*/num_threads, 2363229997Sken /*priority*/PWAIT, 2364229997Sken /*thread name*/ 2365229997Sken "%s taskq", be_lun->lunname); 2366229997Sken 2367229997Sken if (retval != 0) 2368229997Sken goto bailout_error; 2369229997Sken 2370229997Sken be_lun->num_threads = num_threads; 2371229997Sken 2372229997Sken mtx_lock(&softc->lock); 2373229997Sken softc->num_luns++; 2374229997Sken STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links); 2375229997Sken 2376229997Sken mtx_unlock(&softc->lock); 2377229997Sken 2378229997Sken retval = ctl_add_lun(&be_lun->ctl_be_lun); 2379229997Sken if (retval != 0) { 2380229997Sken mtx_lock(&softc->lock); 2381229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2382229997Sken links); 2383229997Sken softc->num_luns--; 2384229997Sken mtx_unlock(&softc->lock); 2385229997Sken snprintf(req->error_str, sizeof(req->error_str), 2386273315Smav "ctl_add_lun() returned error %d, see dmesg for " 2387273315Smav "details", retval); 2388229997Sken retval = 0; 2389229997Sken goto bailout_error; 2390229997Sken } 2391229997Sken 2392229997Sken mtx_lock(&softc->lock); 2393229997Sken 2394229997Sken /* 2395229997Sken * Tell the config_status routine that we're waiting so it won't 2396229997Sken * clean up the LUN in the event of an error. 2397229997Sken */ 2398229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2399229997Sken 2400229997Sken while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) { 2401229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2402229997Sken if (retval == EINTR) 2403229997Sken break; 2404229997Sken } 2405229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2406229997Sken 2407229997Sken if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) { 2408229997Sken snprintf(req->error_str, sizeof(req->error_str), 2409273315Smav "LUN configuration error, see dmesg for details"); 2410229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2411229997Sken links); 2412229997Sken softc->num_luns--; 2413229997Sken mtx_unlock(&softc->lock); 2414229997Sken goto bailout_error; 2415229997Sken } else { 2416229997Sken params->req_lun_id = be_lun->ctl_be_lun.lun_id; 2417229997Sken } 2418229997Sken 2419229997Sken mtx_unlock(&softc->lock); 2420229997Sken 2421229997Sken be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id, 2422229997Sken be_lun->blocksize, 2423229997Sken DEVSTAT_ALL_SUPPORTED, 2424229997Sken be_lun->ctl_be_lun.lun_type 2425229997Sken | DEVSTAT_TYPE_IF_OTHER, 2426229997Sken DEVSTAT_PRIORITY_OTHER); 2427229997Sken 2428229997Sken return (retval); 2429229997Sken 2430229997Skenbailout_error: 2431229997Sken req->status = CTL_LUN_ERROR; 2432229997Sken 2433267754Smav if (be_lun->io_taskqueue != NULL) 2434267754Smav taskqueue_free(be_lun->io_taskqueue); 2435229997Sken ctl_be_block_close(be_lun); 2436267754Smav if (be_lun->dev_path != NULL) 2437267754Smav free(be_lun->dev_path, M_CTLBLK); 2438267754Smav if (be_lun->lun_zone != NULL) 2439267754Smav uma_zdestroy(be_lun->lun_zone); 2440268678Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2441268549Smav mtx_destroy(&be_lun->queue_lock); 2442268549Smav mtx_destroy(&be_lun->io_lock); 2443229997Sken free(be_lun, M_CTLBLK); 2444229997Sken 2445229997Sken return (retval); 2446229997Sken} 2447229997Sken 2448229997Skenstatic int 2449229997Skenctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2450229997Sken{ 2451229997Sken struct ctl_lun_rm_params *params; 2452229997Sken struct ctl_be_block_lun *be_lun; 2453229997Sken int retval; 2454229997Sken 2455229997Sken params = &req->reqdata.rm; 2456229997Sken 2457229997Sken mtx_lock(&softc->lock); 2458229997Sken 2459229997Sken be_lun = NULL; 2460229997Sken 2461229997Sken STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2462229997Sken if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2463229997Sken break; 2464229997Sken } 2465229997Sken mtx_unlock(&softc->lock); 2466229997Sken 2467229997Sken if (be_lun == NULL) { 2468229997Sken snprintf(req->error_str, sizeof(req->error_str), 2469273315Smav "LUN %u is not managed by the block backend", 2470273315Smav params->lun_id); 2471229997Sken goto bailout_error; 2472229997Sken } 2473229997Sken 2474229997Sken retval = ctl_disable_lun(&be_lun->ctl_be_lun); 2475229997Sken 2476229997Sken if (retval != 0) { 2477229997Sken snprintf(req->error_str, sizeof(req->error_str), 2478273315Smav "error %d returned from ctl_disable_lun() for " 2479273315Smav "LUN %d", retval, params->lun_id); 2480229997Sken goto bailout_error; 2481229997Sken 2482229997Sken } 2483229997Sken 2484229997Sken retval = ctl_invalidate_lun(&be_lun->ctl_be_lun); 2485229997Sken if (retval != 0) { 2486229997Sken snprintf(req->error_str, sizeof(req->error_str), 2487273315Smav "error %d returned from ctl_invalidate_lun() for " 2488273315Smav "LUN %d", retval, params->lun_id); 2489229997Sken goto bailout_error; 2490229997Sken } 2491229997Sken 2492229997Sken mtx_lock(&softc->lock); 2493229997Sken 2494229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2495229997Sken 2496229997Sken while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2497229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2498229997Sken if (retval == EINTR) 2499229997Sken break; 2500229997Sken } 2501229997Sken 2502229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2503229997Sken 2504229997Sken if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2505229997Sken snprintf(req->error_str, sizeof(req->error_str), 2506273315Smav "interrupted waiting for LUN to be freed"); 2507229997Sken mtx_unlock(&softc->lock); 2508229997Sken goto bailout_error; 2509229997Sken } 2510229997Sken 2511229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links); 2512229997Sken 2513229997Sken softc->num_luns--; 2514229997Sken mtx_unlock(&softc->lock); 2515229997Sken 2516229997Sken taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task); 2517229997Sken 2518229997Sken taskqueue_free(be_lun->io_taskqueue); 2519229997Sken 2520229997Sken ctl_be_block_close(be_lun); 2521229997Sken 2522229997Sken if (be_lun->disk_stats != NULL) 2523229997Sken devstat_remove_entry(be_lun->disk_stats); 2524229997Sken 2525229997Sken uma_zdestroy(be_lun->lun_zone); 2526229997Sken 2527268678Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2528229997Sken free(be_lun->dev_path, M_CTLBLK); 2529268549Smav mtx_destroy(&be_lun->queue_lock); 2530268549Smav mtx_destroy(&be_lun->io_lock); 2531229997Sken free(be_lun, M_CTLBLK); 2532229997Sken 2533229997Sken req->status = CTL_LUN_OK; 2534229997Sken 2535229997Sken return (0); 2536229997Sken 2537229997Skenbailout_error: 2538229997Sken 2539229997Sken req->status = CTL_LUN_ERROR; 2540229997Sken 2541229997Sken return (0); 2542229997Sken} 2543229997Sken 2544232604Straszstatic int 2545232604Straszctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 2546232604Strasz struct ctl_lun_req *req) 2547232604Strasz{ 2548232604Strasz struct vattr vattr; 2549232604Strasz int error; 2550273315Smav struct ctl_lun_create_params *params = &be_lun->params; 2551232604Strasz 2552232604Strasz if (params->lun_size_bytes != 0) { 2553232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2554232604Strasz } else { 2555271928Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 2556232604Strasz error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 2557271928Smav VOP_UNLOCK(be_lun->vn, 0); 2558232604Strasz if (error != 0) { 2559232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2560232604Strasz "error calling VOP_GETATTR() for file %s", 2561232604Strasz be_lun->dev_path); 2562232604Strasz return (error); 2563232604Strasz } 2564232604Strasz 2565232604Strasz be_lun->size_bytes = vattr.va_size; 2566232604Strasz } 2567232604Strasz 2568232604Strasz return (0); 2569232604Strasz} 2570232604Strasz 2571232604Straszstatic int 2572232604Straszctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 2573232604Strasz struct ctl_lun_req *req) 2574232604Strasz{ 2575271928Smav struct ctl_be_block_devdata *dev_data; 2576232604Strasz int error; 2577273315Smav struct ctl_lun_create_params *params = &be_lun->params; 2578232604Strasz uint64_t size_bytes; 2579232604Strasz 2580271928Smav dev_data = &be_lun->backend.dev; 2581271928Smav if (!dev_data->csw->d_ioctl) { 2582232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2583273315Smav "no d_ioctl for device %s!", be_lun->dev_path); 2584232604Strasz return (ENODEV); 2585232604Strasz } 2586232604Strasz 2587271928Smav error = dev_data->csw->d_ioctl(dev_data->cdev, DIOCGMEDIASIZE, 2588232604Strasz (caddr_t)&size_bytes, FREAD, 2589232604Strasz curthread); 2590232604Strasz if (error) { 2591232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2592273315Smav "error %d returned for DIOCGMEDIASIZE ioctl " 2593273315Smav "on %s!", error, be_lun->dev_path); 2594232604Strasz return (error); 2595232604Strasz } 2596232604Strasz 2597232604Strasz if (params->lun_size_bytes != 0) { 2598232604Strasz if (params->lun_size_bytes > size_bytes) { 2599232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2600273315Smav "requested LUN size %ju > backing device " 2601273315Smav "size %ju", 2602232604Strasz (uintmax_t)params->lun_size_bytes, 2603232604Strasz (uintmax_t)size_bytes); 2604232604Strasz return (EINVAL); 2605232604Strasz } 2606232604Strasz 2607232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2608232604Strasz } else { 2609232604Strasz be_lun->size_bytes = size_bytes; 2610232604Strasz } 2611232604Strasz 2612232604Strasz return (0); 2613232604Strasz} 2614232604Strasz 2615232604Straszstatic int 2616232604Straszctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2617232604Strasz{ 2618232604Strasz struct ctl_lun_modify_params *params; 2619232604Strasz struct ctl_be_block_lun *be_lun; 2620271928Smav uint64_t oldsize; 2621241896Skib int error; 2622232604Strasz 2623232604Strasz params = &req->reqdata.modify; 2624232604Strasz 2625232604Strasz mtx_lock(&softc->lock); 2626232604Strasz be_lun = NULL; 2627232604Strasz STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2628232604Strasz if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2629232604Strasz break; 2630232604Strasz } 2631232604Strasz mtx_unlock(&softc->lock); 2632232604Strasz 2633232604Strasz if (be_lun == NULL) { 2634232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2635273315Smav "LUN %u is not managed by the block backend", 2636273315Smav params->lun_id); 2637232604Strasz goto bailout_error; 2638232604Strasz } 2639232604Strasz 2640273315Smav be_lun->params.lun_size_bytes = params->lun_size_bytes; 2641232604Strasz 2642274387Smav oldsize = be_lun->size_bytes; 2643273315Smav if (be_lun->vn == NULL) 2644273315Smav error = ctl_be_block_open(softc, be_lun, req); 2645273315Smav else if (be_lun->vn->v_type == VREG) 2646232604Strasz error = ctl_be_block_modify_file(be_lun, req); 2647232604Strasz else 2648232604Strasz error = ctl_be_block_modify_dev(be_lun, req); 2649232604Strasz 2650274387Smav if (error == 0 && be_lun->size_bytes != oldsize) { 2651271928Smav be_lun->size_blocks = be_lun->size_bytes >> 2652271928Smav be_lun->blocksize_shift; 2653232604Strasz 2654271928Smav /* 2655271928Smav * The maximum LBA is the size - 1. 2656271928Smav * 2657271928Smav * XXX: Note that this field is being updated without locking, 2658271928Smav * which might cause problems on 32-bit architectures. 2659271928Smav */ 2660273315Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2661273315Smav 0 : (be_lun->size_blocks - 1); 2662273315Smav be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2663273315Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2664273315Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2665276179Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2666276179Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2667276237Smav be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock; 2668276237Smav be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen; 2669271928Smav ctl_lun_capacity_changed(&be_lun->ctl_be_lun); 2670273315Smav if (oldsize == 0 && be_lun->size_blocks != 0) 2671273315Smav ctl_lun_online(&be_lun->ctl_be_lun); 2672271928Smav } 2673232604Strasz 2674232604Strasz /* Tell the user the exact size we ended up using */ 2675232604Strasz params->lun_size_bytes = be_lun->size_bytes; 2676232604Strasz 2677273315Smav req->status = error ? CTL_LUN_WARNING : CTL_LUN_OK; 2678232604Strasz 2679232604Strasz return (0); 2680232604Strasz 2681232604Straszbailout_error: 2682232604Strasz req->status = CTL_LUN_ERROR; 2683232604Strasz 2684232604Strasz return (0); 2685232604Strasz} 2686232604Strasz 2687229997Skenstatic void 2688229997Skenctl_be_block_lun_shutdown(void *be_lun) 2689229997Sken{ 2690229997Sken struct ctl_be_block_lun *lun; 2691229997Sken struct ctl_be_block_softc *softc; 2692229997Sken 2693229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2694229997Sken 2695229997Sken softc = lun->softc; 2696229997Sken 2697229997Sken mtx_lock(&softc->lock); 2698229997Sken lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED; 2699229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2700229997Sken wakeup(lun); 2701229997Sken mtx_unlock(&softc->lock); 2702229997Sken 2703229997Sken} 2704229997Sken 2705229997Skenstatic void 2706229997Skenctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status) 2707229997Sken{ 2708229997Sken struct ctl_be_block_lun *lun; 2709229997Sken struct ctl_be_block_softc *softc; 2710229997Sken 2711229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2712229997Sken softc = lun->softc; 2713229997Sken 2714229997Sken if (status == CTL_LUN_CONFIG_OK) { 2715229997Sken mtx_lock(&softc->lock); 2716229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2717229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2718229997Sken wakeup(lun); 2719229997Sken mtx_unlock(&softc->lock); 2720229997Sken 2721229997Sken /* 2722229997Sken * We successfully added the LUN, attempt to enable it. 2723229997Sken */ 2724229997Sken if (ctl_enable_lun(&lun->ctl_be_lun) != 0) { 2725229997Sken printf("%s: ctl_enable_lun() failed!\n", __func__); 2726229997Sken if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) { 2727229997Sken printf("%s: ctl_invalidate_lun() failed!\n", 2728229997Sken __func__); 2729229997Sken } 2730229997Sken } 2731229997Sken 2732229997Sken return; 2733229997Sken } 2734229997Sken 2735229997Sken 2736229997Sken mtx_lock(&softc->lock); 2737229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2738229997Sken lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR; 2739229997Sken wakeup(lun); 2740229997Sken mtx_unlock(&softc->lock); 2741229997Sken} 2742229997Sken 2743229997Sken 2744229997Skenstatic int 2745229997Skenctl_be_block_config_write(union ctl_io *io) 2746229997Sken{ 2747229997Sken struct ctl_be_block_lun *be_lun; 2748229997Sken struct ctl_be_lun *ctl_be_lun; 2749229997Sken int retval; 2750229997Sken 2751229997Sken retval = 0; 2752229997Sken 2753229997Sken DPRINTF("entered\n"); 2754229997Sken 2755229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2756229997Sken CTL_PRIV_BACKEND_LUN].ptr; 2757229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2758229997Sken 2759229997Sken switch (io->scsiio.cdb[0]) { 2760229997Sken case SYNCHRONIZE_CACHE: 2761229997Sken case SYNCHRONIZE_CACHE_16: 2762265634Smav case WRITE_SAME_10: 2763265634Smav case WRITE_SAME_16: 2764265634Smav case UNMAP: 2765229997Sken /* 2766229997Sken * The upper level CTL code will filter out any CDBs with 2767229997Sken * the immediate bit set and return the proper error. 2768229997Sken * 2769229997Sken * We don't really need to worry about what LBA range the 2770229997Sken * user asked to be synced out. When they issue a sync 2771229997Sken * cache command, we'll sync out the whole thing. 2772229997Sken */ 2773268549Smav mtx_lock(&be_lun->queue_lock); 2774229997Sken STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr, 2775229997Sken links); 2776268549Smav mtx_unlock(&be_lun->queue_lock); 2777229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 2778229997Sken break; 2779229997Sken case START_STOP_UNIT: { 2780229997Sken struct scsi_start_stop_unit *cdb; 2781229997Sken 2782229997Sken cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 2783229997Sken 2784229997Sken if (cdb->how & SSS_START) 2785229997Sken retval = ctl_start_lun(ctl_be_lun); 2786229997Sken else { 2787229997Sken retval = ctl_stop_lun(ctl_be_lun); 2788229997Sken /* 2789229997Sken * XXX KDM Copan-specific offline behavior. 2790229997Sken * Figure out a reasonable way to port this? 2791229997Sken */ 2792229997Sken#ifdef NEEDTOPORT 2793229997Sken if ((retval == 0) 2794229997Sken && (cdb->byte2 & SSS_ONOFFLINE)) 2795229997Sken retval = ctl_lun_offline(ctl_be_lun); 2796229997Sken#endif 2797229997Sken } 2798229997Sken 2799229997Sken /* 2800229997Sken * In general, the above routines should not fail. They 2801229997Sken * just set state for the LUN. So we've got something 2802229997Sken * pretty wrong here if we can't start or stop the LUN. 2803229997Sken */ 2804229997Sken if (retval != 0) { 2805229997Sken ctl_set_internal_failure(&io->scsiio, 2806229997Sken /*sks_valid*/ 1, 2807229997Sken /*retry_count*/ 0xf051); 2808229997Sken retval = CTL_RETVAL_COMPLETE; 2809229997Sken } else { 2810229997Sken ctl_set_success(&io->scsiio); 2811229997Sken } 2812229997Sken ctl_config_write_done(io); 2813229997Sken break; 2814229997Sken } 2815229997Sken default: 2816229997Sken ctl_set_invalid_opcode(&io->scsiio); 2817229997Sken ctl_config_write_done(io); 2818229997Sken retval = CTL_RETVAL_COMPLETE; 2819229997Sken break; 2820229997Sken } 2821229997Sken 2822229997Sken return (retval); 2823229997Sken} 2824229997Sken 2825229997Skenstatic int 2826229997Skenctl_be_block_config_read(union ctl_io *io) 2827229997Sken{ 2828275892Smav struct ctl_be_block_lun *be_lun; 2829275892Smav struct ctl_be_lun *ctl_be_lun; 2830275892Smav int retval = 0; 2831275892Smav 2832275892Smav DPRINTF("entered\n"); 2833275892Smav 2834275892Smav ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2835275892Smav CTL_PRIV_BACKEND_LUN].ptr; 2836275892Smav be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2837275892Smav 2838275892Smav switch (io->scsiio.cdb[0]) { 2839275892Smav case SERVICE_ACTION_IN: 2840275892Smav if (io->scsiio.cdb[1] == SGLS_SERVICE_ACTION) { 2841275892Smav mtx_lock(&be_lun->queue_lock); 2842275892Smav STAILQ_INSERT_TAIL(&be_lun->config_read_queue, 2843275892Smav &io->io_hdr, links); 2844275892Smav mtx_unlock(&be_lun->queue_lock); 2845275892Smav taskqueue_enqueue(be_lun->io_taskqueue, 2846275892Smav &be_lun->io_task); 2847275892Smav retval = CTL_RETVAL_QUEUED; 2848275892Smav break; 2849275892Smav } 2850275892Smav ctl_set_invalid_field(&io->scsiio, 2851275892Smav /*sks_valid*/ 1, 2852275892Smav /*command*/ 1, 2853275892Smav /*field*/ 1, 2854275892Smav /*bit_valid*/ 1, 2855275892Smav /*bit*/ 4); 2856275892Smav ctl_config_read_done(io); 2857275892Smav retval = CTL_RETVAL_COMPLETE; 2858275892Smav break; 2859275892Smav default: 2860275892Smav ctl_set_invalid_opcode(&io->scsiio); 2861275892Smav ctl_config_read_done(io); 2862275892Smav retval = CTL_RETVAL_COMPLETE; 2863275892Smav break; 2864275892Smav } 2865275892Smav 2866275892Smav return (retval); 2867229997Sken} 2868229997Sken 2869229997Skenstatic int 2870229997Skenctl_be_block_lun_info(void *be_lun, struct sbuf *sb) 2871229997Sken{ 2872229997Sken struct ctl_be_block_lun *lun; 2873229997Sken int retval; 2874229997Sken 2875229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2876229997Sken retval = 0; 2877229997Sken 2878268555Smav retval = sbuf_printf(sb, "\t<num_threads>"); 2879229997Sken 2880229997Sken if (retval != 0) 2881229997Sken goto bailout; 2882229997Sken 2883229997Sken retval = sbuf_printf(sb, "%d", lun->num_threads); 2884229997Sken 2885229997Sken if (retval != 0) 2886229997Sken goto bailout; 2887229997Sken 2888268555Smav retval = sbuf_printf(sb, "</num_threads>\n"); 2889229997Sken 2890229997Skenbailout: 2891229997Sken 2892229997Sken return (retval); 2893229997Sken} 2894229997Sken 2895274732Smavstatic uint64_t 2896274732Smavctl_be_block_lun_attr(void *be_lun, const char *attrname) 2897274732Smav{ 2898274732Smav struct ctl_be_block_lun *lun = (struct ctl_be_block_lun *)be_lun; 2899274732Smav 2900274732Smav if (lun->getattr == NULL) 2901274732Smav return (UINT64_MAX); 2902274732Smav return (lun->getattr(lun, attrname)); 2903274732Smav} 2904274732Smav 2905229997Skenint 2906229997Skenctl_be_block_init(void) 2907229997Sken{ 2908229997Sken struct ctl_be_block_softc *softc; 2909229997Sken int retval; 2910229997Sken 2911229997Sken softc = &backend_block_softc; 2912229997Sken retval = 0; 2913229997Sken 2914268549Smav mtx_init(&softc->lock, "ctlblock", NULL, MTX_DEF); 2915265494Strasz beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io), 2916265494Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 2917229997Sken STAILQ_INIT(&softc->disk_list); 2918229997Sken STAILQ_INIT(&softc->lun_list); 2919229997Sken 2920229997Sken return (retval); 2921229997Sken} 2922