ctl_backend_block.c revision 275953
1229997Sken/*- 2229997Sken * Copyright (c) 2003 Silicon Graphics International Corp. 3229997Sken * Copyright (c) 2009-2011 Spectra Logic Corporation 4232604Strasz * Copyright (c) 2012 The FreeBSD Foundation 5229997Sken * All rights reserved. 6229997Sken * 7232604Strasz * Portions of this software were developed by Edward Tomasz Napierala 8232604Strasz * under sponsorship from the FreeBSD Foundation. 9232604Strasz * 10229997Sken * Redistribution and use in source and binary forms, with or without 11229997Sken * modification, are permitted provided that the following conditions 12229997Sken * are met: 13229997Sken * 1. Redistributions of source code must retain the above copyright 14229997Sken * notice, this list of conditions, and the following disclaimer, 15229997Sken * without modification. 16229997Sken * 2. Redistributions in binary form must reproduce at minimum a disclaimer 17229997Sken * substantially similar to the "NO WARRANTY" disclaimer below 18229997Sken * ("Disclaimer") and any redistribution must be conditioned upon 19229997Sken * including a substantially similar Disclaimer requirement for further 20229997Sken * binary redistribution. 21229997Sken * 22229997Sken * NO WARRANTY 23229997Sken * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 24229997Sken * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 25229997Sken * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 26229997Sken * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 27229997Sken * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28229997Sken * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29229997Sken * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30229997Sken * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 31229997Sken * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 32229997Sken * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33229997Sken * POSSIBILITY OF SUCH DAMAGES. 34229997Sken * 35229997Sken * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend_block.c#5 $ 36229997Sken */ 37229997Sken/* 38229997Sken * CAM Target Layer driver backend for block devices. 39229997Sken * 40229997Sken * Author: Ken Merry <ken@FreeBSD.org> 41229997Sken */ 42229997Sken#include <sys/cdefs.h> 43229997Sken__FBSDID("$FreeBSD: head/sys/cam/ctl/ctl_backend_block.c 275953 2014-12-20 13:33:31Z mav $"); 44229997Sken 45229997Sken#include <sys/param.h> 46229997Sken#include <sys/systm.h> 47229997Sken#include <sys/kernel.h> 48229997Sken#include <sys/types.h> 49229997Sken#include <sys/kthread.h> 50229997Sken#include <sys/bio.h> 51229997Sken#include <sys/fcntl.h> 52264274Smav#include <sys/limits.h> 53229997Sken#include <sys/lock.h> 54229997Sken#include <sys/mutex.h> 55229997Sken#include <sys/condvar.h> 56229997Sken#include <sys/malloc.h> 57229997Sken#include <sys/conf.h> 58229997Sken#include <sys/ioccom.h> 59229997Sken#include <sys/queue.h> 60229997Sken#include <sys/sbuf.h> 61229997Sken#include <sys/endian.h> 62229997Sken#include <sys/uio.h> 63229997Sken#include <sys/buf.h> 64229997Sken#include <sys/taskqueue.h> 65229997Sken#include <sys/vnode.h> 66229997Sken#include <sys/namei.h> 67229997Sken#include <sys/mount.h> 68229997Sken#include <sys/disk.h> 69229997Sken#include <sys/fcntl.h> 70229997Sken#include <sys/filedesc.h> 71275474Smav#include <sys/filio.h> 72229997Sken#include <sys/proc.h> 73229997Sken#include <sys/pcpu.h> 74229997Sken#include <sys/module.h> 75229997Sken#include <sys/sdt.h> 76229997Sken#include <sys/devicestat.h> 77229997Sken#include <sys/sysctl.h> 78229997Sken 79229997Sken#include <geom/geom.h> 80229997Sken 81229997Sken#include <cam/cam.h> 82229997Sken#include <cam/scsi/scsi_all.h> 83229997Sken#include <cam/scsi/scsi_da.h> 84229997Sken#include <cam/ctl/ctl_io.h> 85229997Sken#include <cam/ctl/ctl.h> 86229997Sken#include <cam/ctl/ctl_backend.h> 87229997Sken#include <cam/ctl/ctl_frontend_internal.h> 88229997Sken#include <cam/ctl/ctl_ioctl.h> 89229997Sken#include <cam/ctl/ctl_scsi_all.h> 90229997Sken#include <cam/ctl/ctl_error.h> 91229997Sken 92229997Sken/* 93264886Smav * The idea here is that we'll allocate enough S/G space to hold a 1MB 94264886Smav * I/O. If we get an I/O larger than that, we'll split it. 95229997Sken */ 96267537Smav#define CTLBLK_HALF_IO_SIZE (512 * 1024) 97267537Smav#define CTLBLK_MAX_IO_SIZE (CTLBLK_HALF_IO_SIZE * 2) 98264886Smav#define CTLBLK_MAX_SEG MAXPHYS 99267537Smav#define CTLBLK_HALF_SEGS MAX(CTLBLK_HALF_IO_SIZE / CTLBLK_MAX_SEG, 1) 100267537Smav#define CTLBLK_MAX_SEGS (CTLBLK_HALF_SEGS * 2) 101229997Sken 102229997Sken#ifdef CTLBLK_DEBUG 103229997Sken#define DPRINTF(fmt, args...) \ 104229997Sken printf("cbb(%s:%d): " fmt, __FUNCTION__, __LINE__, ##args) 105229997Sken#else 106229997Sken#define DPRINTF(fmt, args...) do {} while(0) 107229997Sken#endif 108229997Sken 109267519Smav#define PRIV(io) \ 110267519Smav ((struct ctl_ptr_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_BACKEND]) 111267537Smav#define ARGS(io) \ 112267537Smav ((struct ctl_lba_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]) 113267519Smav 114229997SkenSDT_PROVIDER_DEFINE(cbb); 115229997Sken 116229997Skentypedef enum { 117229997Sken CTL_BE_BLOCK_LUN_UNCONFIGURED = 0x01, 118229997Sken CTL_BE_BLOCK_LUN_CONFIG_ERR = 0x02, 119229997Sken CTL_BE_BLOCK_LUN_WAITING = 0x04, 120229997Sken CTL_BE_BLOCK_LUN_MULTI_THREAD = 0x08 121229997Sken} ctl_be_block_lun_flags; 122229997Sken 123229997Skentypedef enum { 124229997Sken CTL_BE_BLOCK_NONE, 125229997Sken CTL_BE_BLOCK_DEV, 126229997Sken CTL_BE_BLOCK_FILE 127229997Sken} ctl_be_block_type; 128229997Sken 129229997Skenstruct ctl_be_block_devdata { 130229997Sken struct cdev *cdev; 131229997Sken struct cdevsw *csw; 132229997Sken int dev_ref; 133229997Sken}; 134229997Sken 135229997Skenstruct ctl_be_block_filedata { 136229997Sken struct ucred *cred; 137229997Sken}; 138229997Sken 139229997Skenunion ctl_be_block_bedata { 140229997Sken struct ctl_be_block_devdata dev; 141229997Sken struct ctl_be_block_filedata file; 142229997Sken}; 143229997Sken 144229997Skenstruct ctl_be_block_io; 145229997Skenstruct ctl_be_block_lun; 146229997Sken 147229997Skentypedef void (*cbb_dispatch_t)(struct ctl_be_block_lun *be_lun, 148229997Sken struct ctl_be_block_io *beio); 149274154Smavtypedef uint64_t (*cbb_getattr_t)(struct ctl_be_block_lun *be_lun, 150274154Smav const char *attrname); 151229997Sken 152229997Sken/* 153229997Sken * Backend LUN structure. There is a 1:1 mapping between a block device 154229997Sken * and a backend block LUN, and between a backend block LUN and a CTL LUN. 155229997Sken */ 156229997Skenstruct ctl_be_block_lun { 157272911Smav struct ctl_lun_create_params params; 158229997Sken struct ctl_block_disk *disk; 159229997Sken char lunname[32]; 160229997Sken char *dev_path; 161229997Sken ctl_be_block_type dev_type; 162229997Sken struct vnode *vn; 163229997Sken union ctl_be_block_bedata backend; 164229997Sken cbb_dispatch_t dispatch; 165229997Sken cbb_dispatch_t lun_flush; 166264274Smav cbb_dispatch_t unmap; 167275474Smav cbb_dispatch_t get_lba_status; 168274154Smav cbb_getattr_t getattr; 169229997Sken uma_zone_t lun_zone; 170229997Sken uint64_t size_blocks; 171229997Sken uint64_t size_bytes; 172229997Sken uint32_t blocksize; 173229997Sken int blocksize_shift; 174264191Smav uint16_t pblockexp; 175264191Smav uint16_t pblockoff; 176275865Smav uint16_t ublockexp; 177275865Smav uint16_t ublockoff; 178275920Smav uint32_t atomicblock; 179275920Smav uint32_t opttxferlen; 180229997Sken struct ctl_be_block_softc *softc; 181229997Sken struct devstat *disk_stats; 182229997Sken ctl_be_block_lun_flags flags; 183229997Sken STAILQ_ENTRY(ctl_be_block_lun) links; 184229997Sken struct ctl_be_lun ctl_be_lun; 185229997Sken struct taskqueue *io_taskqueue; 186229997Sken struct task io_task; 187229997Sken int num_threads; 188229997Sken STAILQ_HEAD(, ctl_io_hdr) input_queue; 189275474Smav STAILQ_HEAD(, ctl_io_hdr) config_read_queue; 190229997Sken STAILQ_HEAD(, ctl_io_hdr) config_write_queue; 191229997Sken STAILQ_HEAD(, ctl_io_hdr) datamove_queue; 192267877Smav struct mtx_padalign io_lock; 193267877Smav struct mtx_padalign queue_lock; 194229997Sken}; 195229997Sken 196229997Sken/* 197229997Sken * Overall softc structure for the block backend module. 198229997Sken */ 199229997Skenstruct ctl_be_block_softc { 200229997Sken struct mtx lock; 201229997Sken int num_disks; 202229997Sken STAILQ_HEAD(, ctl_block_disk) disk_list; 203229997Sken int num_luns; 204229997Sken STAILQ_HEAD(, ctl_be_block_lun) lun_list; 205229997Sken}; 206229997Sken 207229997Skenstatic struct ctl_be_block_softc backend_block_softc; 208229997Sken 209229997Sken/* 210229997Sken * Per-I/O information. 211229997Sken */ 212229997Skenstruct ctl_be_block_io { 213229997Sken union ctl_io *io; 214229997Sken struct ctl_sg_entry sg_segs[CTLBLK_MAX_SEGS]; 215229997Sken struct iovec xiovecs[CTLBLK_MAX_SEGS]; 216229997Sken int bio_cmd; 217229997Sken int num_segs; 218229997Sken int num_bios_sent; 219229997Sken int num_bios_done; 220229997Sken int send_complete; 221229997Sken int num_errors; 222229997Sken struct bintime ds_t0; 223229997Sken devstat_tag_type ds_tag_type; 224229997Sken devstat_trans_flags ds_trans_type; 225229997Sken uint64_t io_len; 226229997Sken uint64_t io_offset; 227229997Sken struct ctl_be_block_softc *softc; 228229997Sken struct ctl_be_block_lun *lun; 229264274Smav void (*beio_cont)(struct ctl_be_block_io *beio); /* to continue processing */ 230229997Sken}; 231229997Sken 232229997Skenstatic int cbb_num_threads = 14; 233229997SkenSYSCTL_NODE(_kern_cam_ctl, OID_AUTO, block, CTLFLAG_RD, 0, 234229997Sken "CAM Target Layer Block Backend"); 235267992ShselaskySYSCTL_INT(_kern_cam_ctl_block, OID_AUTO, num_threads, CTLFLAG_RWTUN, 236229997Sken &cbb_num_threads, 0, "Number of threads per backing file"); 237229997Sken 238229997Skenstatic struct ctl_be_block_io *ctl_alloc_beio(struct ctl_be_block_softc *softc); 239229997Skenstatic void ctl_free_beio(struct ctl_be_block_io *beio); 240229997Skenstatic void ctl_complete_beio(struct ctl_be_block_io *beio); 241229997Skenstatic int ctl_be_block_move_done(union ctl_io *io); 242229997Skenstatic void ctl_be_block_biodone(struct bio *bio); 243229997Skenstatic void ctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 244229997Sken struct ctl_be_block_io *beio); 245229997Skenstatic void ctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 246229997Sken struct ctl_be_block_io *beio); 247275474Smavstatic void ctl_be_block_gls_file(struct ctl_be_block_lun *be_lun, 248275474Smav struct ctl_be_block_io *beio); 249275481Smavstatic uint64_t ctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, 250275481Smav const char *attrname); 251229997Skenstatic void ctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 252229997Sken struct ctl_be_block_io *beio); 253264274Smavstatic void ctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 254264274Smav struct ctl_be_block_io *beio); 255229997Skenstatic void ctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 256229997Sken struct ctl_be_block_io *beio); 257274154Smavstatic uint64_t ctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, 258274154Smav const char *attrname); 259275474Smavstatic void ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 260275474Smav union ctl_io *io); 261229997Skenstatic void ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 262229997Sken union ctl_io *io); 263229997Skenstatic void ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 264229997Sken union ctl_io *io); 265229997Skenstatic void ctl_be_block_worker(void *context, int pending); 266229997Skenstatic int ctl_be_block_submit(union ctl_io *io); 267229997Skenstatic int ctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 268229997Sken int flag, struct thread *td); 269229997Skenstatic int ctl_be_block_open_file(struct ctl_be_block_lun *be_lun, 270229997Sken struct ctl_lun_req *req); 271229997Skenstatic int ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, 272229997Sken struct ctl_lun_req *req); 273229997Skenstatic int ctl_be_block_close(struct ctl_be_block_lun *be_lun); 274229997Skenstatic int ctl_be_block_open(struct ctl_be_block_softc *softc, 275229997Sken struct ctl_be_block_lun *be_lun, 276229997Sken struct ctl_lun_req *req); 277229997Skenstatic int ctl_be_block_create(struct ctl_be_block_softc *softc, 278229997Sken struct ctl_lun_req *req); 279229997Skenstatic int ctl_be_block_rm(struct ctl_be_block_softc *softc, 280229997Sken struct ctl_lun_req *req); 281232604Straszstatic int ctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 282232604Strasz struct ctl_lun_req *req); 283232604Straszstatic int ctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 284232604Strasz struct ctl_lun_req *req); 285232604Straszstatic int ctl_be_block_modify(struct ctl_be_block_softc *softc, 286232604Strasz struct ctl_lun_req *req); 287229997Skenstatic void ctl_be_block_lun_shutdown(void *be_lun); 288229997Skenstatic void ctl_be_block_lun_config_status(void *be_lun, 289229997Sken ctl_lun_config_status status); 290229997Skenstatic int ctl_be_block_config_write(union ctl_io *io); 291229997Skenstatic int ctl_be_block_config_read(union ctl_io *io); 292229997Skenstatic int ctl_be_block_lun_info(void *be_lun, struct sbuf *sb); 293274154Smavstatic uint64_t ctl_be_block_lun_attr(void *be_lun, const char *attrname); 294229997Skenint ctl_be_block_init(void); 295229997Sken 296229997Skenstatic struct ctl_backend_driver ctl_be_block_driver = 297229997Sken{ 298230334Sken .name = "block", 299230334Sken .flags = CTL_BE_FLAG_HAS_CONFIG, 300230334Sken .init = ctl_be_block_init, 301230334Sken .data_submit = ctl_be_block_submit, 302230334Sken .data_move_done = ctl_be_block_move_done, 303230334Sken .config_read = ctl_be_block_config_read, 304230334Sken .config_write = ctl_be_block_config_write, 305230334Sken .ioctl = ctl_be_block_ioctl, 306274154Smav .lun_info = ctl_be_block_lun_info, 307274154Smav .lun_attr = ctl_be_block_lun_attr 308229997Sken}; 309229997Sken 310229997SkenMALLOC_DEFINE(M_CTLBLK, "ctlblk", "Memory used for CTL block backend"); 311229997SkenCTL_BACKEND_DECLARE(cbb, ctl_be_block_driver); 312229997Sken 313264020Straszstatic uma_zone_t beio_zone; 314264020Strasz 315229997Skenstatic struct ctl_be_block_io * 316229997Skenctl_alloc_beio(struct ctl_be_block_softc *softc) 317229997Sken{ 318229997Sken struct ctl_be_block_io *beio; 319229997Sken 320264020Strasz beio = uma_zalloc(beio_zone, M_WAITOK | M_ZERO); 321264020Strasz beio->softc = softc; 322229997Sken return (beio); 323229997Sken} 324229997Sken 325229997Skenstatic void 326229997Skenctl_free_beio(struct ctl_be_block_io *beio) 327229997Sken{ 328229997Sken int duplicate_free; 329229997Sken int i; 330229997Sken 331229997Sken duplicate_free = 0; 332229997Sken 333229997Sken for (i = 0; i < beio->num_segs; i++) { 334229997Sken if (beio->sg_segs[i].addr == NULL) 335229997Sken duplicate_free++; 336229997Sken 337229997Sken uma_zfree(beio->lun->lun_zone, beio->sg_segs[i].addr); 338229997Sken beio->sg_segs[i].addr = NULL; 339267537Smav 340267537Smav /* For compare we had two equal S/G lists. */ 341267537Smav if (ARGS(beio->io)->flags & CTL_LLF_COMPARE) { 342267537Smav uma_zfree(beio->lun->lun_zone, 343267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr); 344267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = NULL; 345267537Smav } 346229997Sken } 347229997Sken 348229997Sken if (duplicate_free > 0) { 349229997Sken printf("%s: %d duplicate frees out of %d segments\n", __func__, 350229997Sken duplicate_free, beio->num_segs); 351229997Sken } 352229997Sken 353264020Strasz uma_zfree(beio_zone, beio); 354229997Sken} 355229997Sken 356229997Skenstatic void 357229997Skenctl_complete_beio(struct ctl_be_block_io *beio) 358229997Sken{ 359267877Smav union ctl_io *io = beio->io; 360229997Sken 361264274Smav if (beio->beio_cont != NULL) { 362264274Smav beio->beio_cont(beio); 363264274Smav } else { 364264274Smav ctl_free_beio(beio); 365267537Smav ctl_data_submit_done(io); 366264274Smav } 367229997Sken} 368229997Sken 369229997Skenstatic int 370229997Skenctl_be_block_move_done(union ctl_io *io) 371229997Sken{ 372229997Sken struct ctl_be_block_io *beio; 373229997Sken struct ctl_be_block_lun *be_lun; 374267537Smav struct ctl_lba_len_flags *lbalen; 375229997Sken#ifdef CTL_TIME_IO 376229997Sken struct bintime cur_bt; 377267537Smav#endif 378267537Smav int i; 379229997Sken 380267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 381229997Sken be_lun = beio->lun; 382229997Sken 383229997Sken DPRINTF("entered\n"); 384229997Sken 385229997Sken#ifdef CTL_TIME_IO 386229997Sken getbintime(&cur_bt); 387229997Sken bintime_sub(&cur_bt, &io->io_hdr.dma_start_bt); 388229997Sken bintime_add(&io->io_hdr.dma_bt, &cur_bt); 389229997Sken io->io_hdr.num_dmas++; 390229997Sken#endif 391267537Smav io->scsiio.kern_rel_offset += io->scsiio.kern_data_len; 392229997Sken 393229997Sken /* 394229997Sken * We set status at this point for read commands, and write 395229997Sken * commands with errors. 396229997Sken */ 397275058Smav if (io->io_hdr.flags & CTL_FLAG_ABORT) { 398275058Smav ; 399275058Smav } else if ((io->io_hdr.port_status == 0) && 400267537Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) { 401267537Smav lbalen = ARGS(beio->io); 402267537Smav if (lbalen->flags & CTL_LLF_READ) { 403267537Smav ctl_set_success(&io->scsiio); 404267537Smav } else if (lbalen->flags & CTL_LLF_COMPARE) { 405267537Smav /* We have two data blocks ready for comparison. */ 406267537Smav for (i = 0; i < beio->num_segs; i++) { 407267537Smav if (memcmp(beio->sg_segs[i].addr, 408267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr, 409267537Smav beio->sg_segs[i].len) != 0) 410267537Smav break; 411267537Smav } 412267537Smav if (i < beio->num_segs) 413267537Smav ctl_set_sense(&io->scsiio, 414267537Smav /*current_error*/ 1, 415267537Smav /*sense_key*/ SSD_KEY_MISCOMPARE, 416267537Smav /*asc*/ 0x1D, 417267537Smav /*ascq*/ 0x00, 418267537Smav SSD_ELEM_NONE); 419267537Smav else 420267537Smav ctl_set_success(&io->scsiio); 421267537Smav } 422275058Smav } else if ((io->io_hdr.port_status != 0) && 423275058Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE || 424275058Smav (io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS)) { 425229997Sken /* 426229997Sken * For hardware error sense keys, the sense key 427229997Sken * specific value is defined to be a retry count, 428229997Sken * but we use it to pass back an internal FETD 429229997Sken * error code. XXX KDM Hopefully the FETD is only 430229997Sken * using 16 bits for an error code, since that's 431229997Sken * all the space we have in the sks field. 432229997Sken */ 433229997Sken ctl_set_internal_failure(&io->scsiio, 434229997Sken /*sks_valid*/ 1, 435229997Sken /*retry_count*/ 436229997Sken io->io_hdr.port_status); 437229997Sken } 438229997Sken 439229997Sken /* 440229997Sken * If this is a read, or a write with errors, it is done. 441229997Sken */ 442229997Sken if ((beio->bio_cmd == BIO_READ) 443229997Sken || ((io->io_hdr.flags & CTL_FLAG_ABORT) != 0) 444229997Sken || ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)) { 445229997Sken ctl_complete_beio(beio); 446229997Sken return (0); 447229997Sken } 448229997Sken 449229997Sken /* 450229997Sken * At this point, we have a write and the DMA completed 451229997Sken * successfully. We now have to queue it to the task queue to 452229997Sken * execute the backend I/O. That is because we do blocking 453229997Sken * memory allocations, and in the file backing case, blocking I/O. 454229997Sken * This move done routine is generally called in the SIM's 455229997Sken * interrupt context, and therefore we cannot block. 456229997Sken */ 457267877Smav mtx_lock(&be_lun->queue_lock); 458229997Sken /* 459229997Sken * XXX KDM make sure that links is okay to use at this point. 460229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 461229997Sken * or deal with resource allocation here. 462229997Sken */ 463229997Sken STAILQ_INSERT_TAIL(&be_lun->datamove_queue, &io->io_hdr, links); 464267877Smav mtx_unlock(&be_lun->queue_lock); 465229997Sken 466229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 467229997Sken 468229997Sken return (0); 469229997Sken} 470229997Sken 471229997Skenstatic void 472229997Skenctl_be_block_biodone(struct bio *bio) 473229997Sken{ 474229997Sken struct ctl_be_block_io *beio; 475229997Sken struct ctl_be_block_lun *be_lun; 476229997Sken union ctl_io *io; 477261538Smav int error; 478229997Sken 479229997Sken beio = bio->bio_caller1; 480229997Sken be_lun = beio->lun; 481229997Sken io = beio->io; 482229997Sken 483229997Sken DPRINTF("entered\n"); 484229997Sken 485261538Smav error = bio->bio_error; 486267877Smav mtx_lock(&be_lun->io_lock); 487261538Smav if (error != 0) 488229997Sken beio->num_errors++; 489229997Sken 490229997Sken beio->num_bios_done++; 491229997Sken 492229997Sken /* 493229997Sken * XXX KDM will this cause WITNESS to complain? Holding a lock 494229997Sken * during the free might cause it to complain. 495229997Sken */ 496229997Sken g_destroy_bio(bio); 497229997Sken 498229997Sken /* 499229997Sken * If the send complete bit isn't set, or we aren't the last I/O to 500229997Sken * complete, then we're done. 501229997Sken */ 502229997Sken if ((beio->send_complete == 0) 503229997Sken || (beio->num_bios_done < beio->num_bios_sent)) { 504267877Smav mtx_unlock(&be_lun->io_lock); 505229997Sken return; 506229997Sken } 507229997Sken 508229997Sken /* 509229997Sken * At this point, we've verified that we are the last I/O to 510229997Sken * complete, so it's safe to drop the lock. 511229997Sken */ 512267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 513267877Smav beio->ds_tag_type, beio->ds_trans_type, 514267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 515267877Smav mtx_unlock(&be_lun->io_lock); 516229997Sken 517229997Sken /* 518229997Sken * If there are any errors from the backing device, we fail the 519229997Sken * entire I/O with a medium error. 520229997Sken */ 521229997Sken if (beio->num_errors > 0) { 522261538Smav if (error == EOPNOTSUPP) { 523261538Smav ctl_set_invalid_opcode(&io->scsiio); 524273809Smav } else if (error == ENOSPC) { 525273809Smav ctl_set_space_alloc_fail(&io->scsiio); 526261538Smav } else if (beio->bio_cmd == BIO_FLUSH) { 527229997Sken /* XXX KDM is there is a better error here? */ 528229997Sken ctl_set_internal_failure(&io->scsiio, 529229997Sken /*sks_valid*/ 1, 530229997Sken /*retry_count*/ 0xbad2); 531229997Sken } else 532229997Sken ctl_set_medium_error(&io->scsiio); 533229997Sken ctl_complete_beio(beio); 534229997Sken return; 535229997Sken } 536229997Sken 537229997Sken /* 538267537Smav * If this is a write, a flush, a delete or verify, we're all done. 539229997Sken * If this is a read, we can now send the data to the user. 540229997Sken */ 541229997Sken if ((beio->bio_cmd == BIO_WRITE) 542264274Smav || (beio->bio_cmd == BIO_FLUSH) 543267537Smav || (beio->bio_cmd == BIO_DELETE) 544267537Smav || (ARGS(io)->flags & CTL_LLF_VERIFY)) { 545229997Sken ctl_set_success(&io->scsiio); 546229997Sken ctl_complete_beio(beio); 547229997Sken } else { 548275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 549275058Smav beio->beio_cont == NULL) 550275058Smav ctl_set_success(&io->scsiio); 551229997Sken#ifdef CTL_TIME_IO 552229997Sken getbintime(&io->io_hdr.dma_start_bt); 553229997Sken#endif 554229997Sken ctl_datamove(io); 555229997Sken } 556229997Sken} 557229997Sken 558229997Skenstatic void 559229997Skenctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 560229997Sken struct ctl_be_block_io *beio) 561229997Sken{ 562267877Smav union ctl_io *io = beio->io; 563229997Sken struct mount *mountpoint; 564241896Skib int error, lock_flags; 565229997Sken 566229997Sken DPRINTF("entered\n"); 567229997Sken 568267877Smav binuptime(&beio->ds_t0); 569267877Smav mtx_lock(&be_lun->io_lock); 570267877Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 571267877Smav mtx_unlock(&be_lun->io_lock); 572229997Sken 573267877Smav (void) vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 574229997Sken 575229997Sken if (MNT_SHARED_WRITES(mountpoint) 576229997Sken || ((mountpoint == NULL) 577229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 578229997Sken lock_flags = LK_SHARED; 579229997Sken else 580229997Sken lock_flags = LK_EXCLUSIVE; 581229997Sken 582229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 583229997Sken 584229997Sken error = VOP_FSYNC(be_lun->vn, MNT_WAIT, curthread); 585229997Sken VOP_UNLOCK(be_lun->vn, 0); 586229997Sken 587229997Sken vn_finished_write(mountpoint); 588229997Sken 589267877Smav mtx_lock(&be_lun->io_lock); 590267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 591267877Smav beio->ds_tag_type, beio->ds_trans_type, 592267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 593267877Smav mtx_unlock(&be_lun->io_lock); 594267877Smav 595229997Sken if (error == 0) 596229997Sken ctl_set_success(&io->scsiio); 597229997Sken else { 598229997Sken /* XXX KDM is there is a better error here? */ 599229997Sken ctl_set_internal_failure(&io->scsiio, 600229997Sken /*sks_valid*/ 1, 601229997Sken /*retry_count*/ 0xbad1); 602229997Sken } 603229997Sken 604229997Sken ctl_complete_beio(beio); 605229997Sken} 606229997Sken 607258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_start, "uint64_t"); 608258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_start, "uint64_t"); 609258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_done,"uint64_t"); 610258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_done, "uint64_t"); 611229997Sken 612229997Skenstatic void 613229997Skenctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 614229997Sken struct ctl_be_block_io *beio) 615229997Sken{ 616229997Sken struct ctl_be_block_filedata *file_data; 617229997Sken union ctl_io *io; 618229997Sken struct uio xuio; 619229997Sken struct iovec *xiovec; 620241896Skib int flags; 621229997Sken int error, i; 622229997Sken 623229997Sken DPRINTF("entered\n"); 624229997Sken 625229997Sken file_data = &be_lun->backend.file; 626229997Sken io = beio->io; 627271309Smav flags = 0; 628271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 629271309Smav flags |= IO_DIRECT; 630271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 631271309Smav flags |= IO_SYNC; 632229997Sken 633267537Smav bzero(&xuio, sizeof(xuio)); 634229997Sken if (beio->bio_cmd == BIO_READ) { 635229997Sken SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 636267537Smav xuio.uio_rw = UIO_READ; 637229997Sken } else { 638229997Sken SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 639267537Smav xuio.uio_rw = UIO_WRITE; 640229997Sken } 641229997Sken xuio.uio_offset = beio->io_offset; 642229997Sken xuio.uio_resid = beio->io_len; 643229997Sken xuio.uio_segflg = UIO_SYSSPACE; 644229997Sken xuio.uio_iov = beio->xiovecs; 645229997Sken xuio.uio_iovcnt = beio->num_segs; 646229997Sken xuio.uio_td = curthread; 647229997Sken 648229997Sken for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 649229997Sken xiovec->iov_base = beio->sg_segs[i].addr; 650229997Sken xiovec->iov_len = beio->sg_segs[i].len; 651229997Sken } 652229997Sken 653267877Smav binuptime(&beio->ds_t0); 654267877Smav mtx_lock(&be_lun->io_lock); 655267877Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 656267877Smav mtx_unlock(&be_lun->io_lock); 657267877Smav 658229997Sken if (beio->bio_cmd == BIO_READ) { 659229997Sken vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 660229997Sken 661229997Sken /* 662229997Sken * UFS pays attention to IO_DIRECT for reads. If the 663229997Sken * DIRECTIO option is configured into the kernel, it calls 664229997Sken * ffs_rawread(). But that only works for single-segment 665229997Sken * uios with user space addresses. In our case, with a 666229997Sken * kernel uio, it still reads into the buffer cache, but it 667229997Sken * will just try to release the buffer from the cache later 668229997Sken * on in ffs_read(). 669229997Sken * 670229997Sken * ZFS does not pay attention to IO_DIRECT for reads. 671229997Sken * 672229997Sken * UFS does not pay attention to IO_SYNC for reads. 673229997Sken * 674229997Sken * ZFS pays attention to IO_SYNC (which translates into the 675229997Sken * Solaris define FRSYNC for zfs_read()) for reads. It 676229997Sken * attempts to sync the file before reading. 677229997Sken * 678229997Sken * So, to attempt to provide some barrier semantics in the 679229997Sken * BIO_ORDERED case, set both IO_DIRECT and IO_SYNC. 680229997Sken */ 681271309Smav error = VOP_READ(be_lun->vn, &xuio, flags, file_data->cred); 682229997Sken 683229997Sken VOP_UNLOCK(be_lun->vn, 0); 684267537Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 685229997Sken } else { 686229997Sken struct mount *mountpoint; 687229997Sken int lock_flags; 688229997Sken 689229997Sken (void)vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 690229997Sken 691229997Sken if (MNT_SHARED_WRITES(mountpoint) 692229997Sken || ((mountpoint == NULL) 693229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 694229997Sken lock_flags = LK_SHARED; 695229997Sken else 696229997Sken lock_flags = LK_EXCLUSIVE; 697229997Sken 698229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 699229997Sken 700229997Sken /* 701229997Sken * UFS pays attention to IO_DIRECT for writes. The write 702229997Sken * is done asynchronously. (Normally the write would just 703229997Sken * get put into cache. 704229997Sken * 705229997Sken * UFS pays attention to IO_SYNC for writes. It will 706229997Sken * attempt to write the buffer out synchronously if that 707229997Sken * flag is set. 708229997Sken * 709229997Sken * ZFS does not pay attention to IO_DIRECT for writes. 710229997Sken * 711229997Sken * ZFS pays attention to IO_SYNC (a.k.a. FSYNC or FRSYNC) 712229997Sken * for writes. It will flush the transaction from the 713229997Sken * cache before returning. 714229997Sken * 715229997Sken * So if we've got the BIO_ORDERED flag set, we want 716229997Sken * IO_SYNC in either the UFS or ZFS case. 717229997Sken */ 718271309Smav error = VOP_WRITE(be_lun->vn, &xuio, flags, file_data->cred); 719229997Sken VOP_UNLOCK(be_lun->vn, 0); 720229997Sken 721229997Sken vn_finished_write(mountpoint); 722267537Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 723229997Sken } 724229997Sken 725267877Smav mtx_lock(&be_lun->io_lock); 726267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 727267877Smav beio->ds_tag_type, beio->ds_trans_type, 728267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 729267877Smav mtx_unlock(&be_lun->io_lock); 730267877Smav 731229997Sken /* 732229997Sken * If we got an error, set the sense data to "MEDIUM ERROR" and 733229997Sken * return the I/O to the user. 734229997Sken */ 735229997Sken if (error != 0) { 736229997Sken char path_str[32]; 737229997Sken 738229997Sken ctl_scsi_path_string(io, path_str, sizeof(path_str)); 739229997Sken printf("%s%s command returned errno %d\n", path_str, 740229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", error); 741273809Smav if (error == ENOSPC) { 742273809Smav ctl_set_space_alloc_fail(&io->scsiio); 743273809Smav } else 744273809Smav ctl_set_medium_error(&io->scsiio); 745229997Sken ctl_complete_beio(beio); 746229997Sken return; 747229997Sken } 748229997Sken 749229997Sken /* 750269122Smav * If this is a write or a verify, we're all done. 751229997Sken * If this is a read, we can now send the data to the user. 752229997Sken */ 753269122Smav if ((beio->bio_cmd == BIO_WRITE) || 754269122Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 755229997Sken ctl_set_success(&io->scsiio); 756229997Sken ctl_complete_beio(beio); 757229997Sken } else { 758275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 759275058Smav beio->beio_cont == NULL) 760275058Smav ctl_set_success(&io->scsiio); 761229997Sken#ifdef CTL_TIME_IO 762229997Sken getbintime(&io->io_hdr.dma_start_bt); 763229997Sken#endif 764229997Sken ctl_datamove(io); 765229997Sken } 766229997Sken} 767229997Sken 768229997Skenstatic void 769275474Smavctl_be_block_gls_file(struct ctl_be_block_lun *be_lun, 770275474Smav struct ctl_be_block_io *beio) 771275474Smav{ 772275474Smav union ctl_io *io = beio->io; 773275474Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 774275474Smav struct scsi_get_lba_status_data *data; 775275474Smav off_t roff, off; 776275474Smav int error, status; 777275474Smav 778275474Smav DPRINTF("entered\n"); 779275474Smav 780275474Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 781275474Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 782275474Smav error = VOP_IOCTL(be_lun->vn, FIOSEEKHOLE, &off, 783275474Smav 0, curthread->td_ucred, curthread); 784275474Smav if (error == 0 && off > roff) 785275474Smav status = 0; /* mapped up to off */ 786275474Smav else { 787275474Smav error = VOP_IOCTL(be_lun->vn, FIOSEEKDATA, &off, 788275474Smav 0, curthread->td_ucred, curthread); 789275474Smav if (error == 0 && off > roff) 790275474Smav status = 1; /* deallocated up to off */ 791275474Smav else { 792275474Smav status = 0; /* unknown up to the end */ 793275474Smav off = be_lun->size_bytes; 794275474Smav } 795275474Smav } 796275474Smav VOP_UNLOCK(be_lun->vn, 0); 797275474Smav 798275474Smav off >>= be_lun->blocksize_shift; 799275474Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 800275474Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 801275474Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 802275474Smav data->descr[0].length); 803275474Smav data->descr[0].status = status; 804275474Smav 805275474Smav ctl_complete_beio(beio); 806275474Smav} 807275474Smav 808275481Smavstatic uint64_t 809275481Smavctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, const char *attrname) 810275481Smav{ 811275481Smav struct vattr vattr; 812275481Smav struct statfs statfs; 813275481Smav int error; 814275481Smav 815275481Smav if (be_lun->vn == NULL) 816275481Smav return (UINT64_MAX); 817275481Smav if (strcmp(attrname, "blocksused") == 0) { 818275481Smav error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 819275481Smav if (error != 0) 820275481Smav return (UINT64_MAX); 821275481Smav return (vattr.va_bytes >> be_lun->blocksize_shift); 822275481Smav } 823275481Smav if (strcmp(attrname, "blocksavail") == 0) { 824275481Smav error = VFS_STATFS(be_lun->vn->v_mount, &statfs); 825275481Smav if (error != 0) 826275481Smav return (UINT64_MAX); 827275481Smav return ((statfs.f_bavail * statfs.f_bsize) >> 828275481Smav be_lun->blocksize_shift); 829275481Smav } 830275481Smav return (UINT64_MAX); 831275481Smav} 832275481Smav 833275474Smavstatic void 834269123Smavctl_be_block_dispatch_zvol(struct ctl_be_block_lun *be_lun, 835269123Smav struct ctl_be_block_io *beio) 836269123Smav{ 837269123Smav struct ctl_be_block_devdata *dev_data; 838269123Smav union ctl_io *io; 839269123Smav struct uio xuio; 840269123Smav struct iovec *xiovec; 841269123Smav int flags; 842269123Smav int error, i; 843269123Smav 844269123Smav DPRINTF("entered\n"); 845269123Smav 846269123Smav dev_data = &be_lun->backend.dev; 847269123Smav io = beio->io; 848271309Smav flags = 0; 849271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 850271309Smav flags |= IO_DIRECT; 851271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 852271309Smav flags |= IO_SYNC; 853269123Smav 854269123Smav bzero(&xuio, sizeof(xuio)); 855269123Smav if (beio->bio_cmd == BIO_READ) { 856269123Smav SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 857269123Smav xuio.uio_rw = UIO_READ; 858269123Smav } else { 859269123Smav SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 860269123Smav xuio.uio_rw = UIO_WRITE; 861269123Smav } 862269123Smav xuio.uio_offset = beio->io_offset; 863269123Smav xuio.uio_resid = beio->io_len; 864269123Smav xuio.uio_segflg = UIO_SYSSPACE; 865269123Smav xuio.uio_iov = beio->xiovecs; 866269123Smav xuio.uio_iovcnt = beio->num_segs; 867269123Smav xuio.uio_td = curthread; 868269123Smav 869269123Smav for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 870269123Smav xiovec->iov_base = beio->sg_segs[i].addr; 871269123Smav xiovec->iov_len = beio->sg_segs[i].len; 872269123Smav } 873269123Smav 874269123Smav binuptime(&beio->ds_t0); 875269123Smav mtx_lock(&be_lun->io_lock); 876269123Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 877269123Smav mtx_unlock(&be_lun->io_lock); 878269123Smav 879269123Smav if (beio->bio_cmd == BIO_READ) { 880271309Smav error = (*dev_data->csw->d_read)(dev_data->cdev, &xuio, flags); 881269123Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 882269123Smav } else { 883271309Smav error = (*dev_data->csw->d_write)(dev_data->cdev, &xuio, flags); 884269123Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 885269123Smav } 886269123Smav 887269123Smav mtx_lock(&be_lun->io_lock); 888269123Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 889269123Smav beio->ds_tag_type, beio->ds_trans_type, 890269123Smav /*now*/ NULL, /*then*/&beio->ds_t0); 891269123Smav mtx_unlock(&be_lun->io_lock); 892269123Smav 893269123Smav /* 894269123Smav * If we got an error, set the sense data to "MEDIUM ERROR" and 895269123Smav * return the I/O to the user. 896269123Smav */ 897269123Smav if (error != 0) { 898273809Smav if (error == ENOSPC) { 899273809Smav ctl_set_space_alloc_fail(&io->scsiio); 900273809Smav } else 901273809Smav ctl_set_medium_error(&io->scsiio); 902269123Smav ctl_complete_beio(beio); 903269123Smav return; 904269123Smav } 905269123Smav 906269123Smav /* 907269123Smav * If this is a write or a verify, we're all done. 908269123Smav * If this is a read, we can now send the data to the user. 909269123Smav */ 910269123Smav if ((beio->bio_cmd == BIO_WRITE) || 911269123Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 912269123Smav ctl_set_success(&io->scsiio); 913269123Smav ctl_complete_beio(beio); 914269123Smav } else { 915275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 916275058Smav beio->beio_cont == NULL) 917275058Smav ctl_set_success(&io->scsiio); 918269123Smav#ifdef CTL_TIME_IO 919269123Smav getbintime(&io->io_hdr.dma_start_bt); 920269123Smav#endif 921269123Smav ctl_datamove(io); 922269123Smav } 923269123Smav} 924269123Smav 925269123Smavstatic void 926275474Smavctl_be_block_gls_zvol(struct ctl_be_block_lun *be_lun, 927275474Smav struct ctl_be_block_io *beio) 928275474Smav{ 929275474Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 930275474Smav union ctl_io *io = beio->io; 931275474Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 932275474Smav struct scsi_get_lba_status_data *data; 933275474Smav off_t roff, off; 934275474Smav int error, status; 935275474Smav 936275474Smav DPRINTF("entered\n"); 937275474Smav 938275474Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 939275474Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKHOLE, 940275474Smav (caddr_t)&off, FREAD, curthread); 941275474Smav if (error == 0 && off > roff) 942275474Smav status = 0; /* mapped up to off */ 943275474Smav else { 944275474Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKDATA, 945275474Smav (caddr_t)&off, FREAD, curthread); 946275474Smav if (error == 0 && off > roff) 947275474Smav status = 1; /* deallocated up to off */ 948275474Smav else { 949275474Smav status = 0; /* unknown up to the end */ 950275474Smav off = be_lun->size_bytes; 951275474Smav } 952275474Smav } 953275474Smav 954275474Smav off >>= be_lun->blocksize_shift; 955275474Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 956275474Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 957275474Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 958275474Smav data->descr[0].length); 959275474Smav data->descr[0].status = status; 960275474Smav 961275474Smav ctl_complete_beio(beio); 962275474Smav} 963275474Smav 964275474Smavstatic void 965229997Skenctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 966229997Sken struct ctl_be_block_io *beio) 967229997Sken{ 968229997Sken struct bio *bio; 969229997Sken union ctl_io *io; 970229997Sken struct ctl_be_block_devdata *dev_data; 971229997Sken 972229997Sken dev_data = &be_lun->backend.dev; 973229997Sken io = beio->io; 974229997Sken 975229997Sken DPRINTF("entered\n"); 976229997Sken 977229997Sken /* This can't fail, it's a blocking allocation. */ 978229997Sken bio = g_alloc_bio(); 979229997Sken 980229997Sken bio->bio_cmd = BIO_FLUSH; 981229997Sken bio->bio_flags |= BIO_ORDERED; 982229997Sken bio->bio_dev = dev_data->cdev; 983229997Sken bio->bio_offset = 0; 984229997Sken bio->bio_data = 0; 985229997Sken bio->bio_done = ctl_be_block_biodone; 986229997Sken bio->bio_caller1 = beio; 987229997Sken bio->bio_pblkno = 0; 988229997Sken 989229997Sken /* 990229997Sken * We don't need to acquire the LUN lock here, because we are only 991229997Sken * sending one bio, and so there is no other context to synchronize 992229997Sken * with. 993229997Sken */ 994229997Sken beio->num_bios_sent = 1; 995229997Sken beio->send_complete = 1; 996229997Sken 997229997Sken binuptime(&beio->ds_t0); 998267877Smav mtx_lock(&be_lun->io_lock); 999229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1000267877Smav mtx_unlock(&be_lun->io_lock); 1001229997Sken 1002229997Sken (*dev_data->csw->d_strategy)(bio); 1003229997Sken} 1004229997Sken 1005229997Skenstatic void 1006264274Smavctl_be_block_unmap_dev_range(struct ctl_be_block_lun *be_lun, 1007264274Smav struct ctl_be_block_io *beio, 1008264274Smav uint64_t off, uint64_t len, int last) 1009264274Smav{ 1010264274Smav struct bio *bio; 1011264274Smav struct ctl_be_block_devdata *dev_data; 1012264296Smav uint64_t maxlen; 1013264274Smav 1014264274Smav dev_data = &be_lun->backend.dev; 1015264296Smav maxlen = LONG_MAX - (LONG_MAX % be_lun->blocksize); 1016264274Smav while (len > 0) { 1017264274Smav bio = g_alloc_bio(); 1018264274Smav bio->bio_cmd = BIO_DELETE; 1019264274Smav bio->bio_dev = dev_data->cdev; 1020264274Smav bio->bio_offset = off; 1021264296Smav bio->bio_length = MIN(len, maxlen); 1022264274Smav bio->bio_data = 0; 1023264274Smav bio->bio_done = ctl_be_block_biodone; 1024264274Smav bio->bio_caller1 = beio; 1025264296Smav bio->bio_pblkno = off / be_lun->blocksize; 1026264274Smav 1027264274Smav off += bio->bio_length; 1028264274Smav len -= bio->bio_length; 1029264274Smav 1030267877Smav mtx_lock(&be_lun->io_lock); 1031264274Smav beio->num_bios_sent++; 1032264274Smav if (last && len == 0) 1033264274Smav beio->send_complete = 1; 1034267877Smav mtx_unlock(&be_lun->io_lock); 1035264274Smav 1036264274Smav (*dev_data->csw->d_strategy)(bio); 1037264274Smav } 1038264274Smav} 1039264274Smav 1040264274Smavstatic void 1041264274Smavctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 1042264274Smav struct ctl_be_block_io *beio) 1043264274Smav{ 1044264274Smav union ctl_io *io; 1045264274Smav struct ctl_be_block_devdata *dev_data; 1046267515Smav struct ctl_ptr_len_flags *ptrlen; 1047264274Smav struct scsi_unmap_desc *buf, *end; 1048264274Smav uint64_t len; 1049264274Smav 1050264274Smav dev_data = &be_lun->backend.dev; 1051264274Smav io = beio->io; 1052264274Smav 1053264274Smav DPRINTF("entered\n"); 1054264274Smav 1055264274Smav binuptime(&beio->ds_t0); 1056267877Smav mtx_lock(&be_lun->io_lock); 1057264274Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1058267877Smav mtx_unlock(&be_lun->io_lock); 1059264274Smav 1060264274Smav if (beio->io_offset == -1) { 1061264274Smav beio->io_len = 0; 1062267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1063267515Smav buf = (struct scsi_unmap_desc *)ptrlen->ptr; 1064267515Smav end = buf + ptrlen->len / sizeof(*buf); 1065264274Smav for (; buf < end; buf++) { 1066264274Smav len = (uint64_t)scsi_4btoul(buf->length) * 1067264274Smav be_lun->blocksize; 1068264274Smav beio->io_len += len; 1069264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1070264274Smav scsi_8btou64(buf->lba) * be_lun->blocksize, len, 1071264283Smav (end - buf < 2) ? TRUE : FALSE); 1072264274Smav } 1073264274Smav } else 1074264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1075264274Smav beio->io_offset, beio->io_len, TRUE); 1076264274Smav} 1077264274Smav 1078264274Smavstatic void 1079229997Skenctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 1080229997Sken struct ctl_be_block_io *beio) 1081229997Sken{ 1082267877Smav TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 1083229997Sken int i; 1084229997Sken struct bio *bio; 1085229997Sken struct ctl_be_block_devdata *dev_data; 1086229997Sken off_t cur_offset; 1087229997Sken int max_iosize; 1088229997Sken 1089229997Sken DPRINTF("entered\n"); 1090229997Sken 1091229997Sken dev_data = &be_lun->backend.dev; 1092229997Sken 1093229997Sken /* 1094229997Sken * We have to limit our I/O size to the maximum supported by the 1095229997Sken * backend device. Hopefully it is MAXPHYS. If the driver doesn't 1096229997Sken * set it properly, use DFLTPHYS. 1097229997Sken */ 1098229997Sken max_iosize = dev_data->cdev->si_iosize_max; 1099229997Sken if (max_iosize < PAGE_SIZE) 1100229997Sken max_iosize = DFLTPHYS; 1101229997Sken 1102229997Sken cur_offset = beio->io_offset; 1103229997Sken for (i = 0; i < beio->num_segs; i++) { 1104229997Sken size_t cur_size; 1105229997Sken uint8_t *cur_ptr; 1106229997Sken 1107229997Sken cur_size = beio->sg_segs[i].len; 1108229997Sken cur_ptr = beio->sg_segs[i].addr; 1109229997Sken 1110229997Sken while (cur_size > 0) { 1111229997Sken /* This can't fail, it's a blocking allocation. */ 1112229997Sken bio = g_alloc_bio(); 1113229997Sken 1114229997Sken KASSERT(bio != NULL, ("g_alloc_bio() failed!\n")); 1115229997Sken 1116229997Sken bio->bio_cmd = beio->bio_cmd; 1117229997Sken bio->bio_dev = dev_data->cdev; 1118229997Sken bio->bio_caller1 = beio; 1119229997Sken bio->bio_length = min(cur_size, max_iosize); 1120229997Sken bio->bio_offset = cur_offset; 1121229997Sken bio->bio_data = cur_ptr; 1122229997Sken bio->bio_done = ctl_be_block_biodone; 1123229997Sken bio->bio_pblkno = cur_offset / be_lun->blocksize; 1124229997Sken 1125229997Sken cur_offset += bio->bio_length; 1126229997Sken cur_ptr += bio->bio_length; 1127229997Sken cur_size -= bio->bio_length; 1128229997Sken 1129267877Smav TAILQ_INSERT_TAIL(&queue, bio, bio_queue); 1130229997Sken beio->num_bios_sent++; 1131229997Sken } 1132229997Sken } 1133267877Smav binuptime(&beio->ds_t0); 1134267877Smav mtx_lock(&be_lun->io_lock); 1135267877Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1136267877Smav beio->send_complete = 1; 1137267877Smav mtx_unlock(&be_lun->io_lock); 1138267877Smav 1139267877Smav /* 1140267877Smav * Fire off all allocated requests! 1141267877Smav */ 1142267877Smav while ((bio = TAILQ_FIRST(&queue)) != NULL) { 1143267877Smav TAILQ_REMOVE(&queue, bio, bio_queue); 1144267877Smav (*dev_data->csw->d_strategy)(bio); 1145267877Smav } 1146229997Sken} 1147229997Sken 1148274154Smavstatic uint64_t 1149274154Smavctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, const char *attrname) 1150274154Smav{ 1151274154Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 1152274154Smav struct diocgattr_arg arg; 1153274154Smav int error; 1154274154Smav 1155274154Smav if (dev_data->csw == NULL || dev_data->csw->d_ioctl == NULL) 1156274154Smav return (UINT64_MAX); 1157274154Smav strlcpy(arg.name, attrname, sizeof(arg.name)); 1158274154Smav arg.len = sizeof(arg.value.off); 1159274154Smav error = dev_data->csw->d_ioctl(dev_data->cdev, 1160274154Smav DIOCGATTR, (caddr_t)&arg, FREAD, curthread); 1161274154Smav if (error != 0) 1162274154Smav return (UINT64_MAX); 1163274154Smav return (arg.value.off); 1164274154Smav} 1165274154Smav 1166229997Skenstatic void 1167264274Smavctl_be_block_cw_done_ws(struct ctl_be_block_io *beio) 1168264274Smav{ 1169264274Smav union ctl_io *io; 1170264274Smav 1171264274Smav io = beio->io; 1172264274Smav ctl_free_beio(beio); 1173267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1174267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1175267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1176264274Smav ctl_config_write_done(io); 1177264274Smav return; 1178264274Smav } 1179264274Smav 1180264274Smav ctl_be_block_config_write(io); 1181264274Smav} 1182264274Smav 1183264274Smavstatic void 1184264274Smavctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun, 1185264274Smav union ctl_io *io) 1186264274Smav{ 1187264274Smav struct ctl_be_block_io *beio; 1188264274Smav struct ctl_be_block_softc *softc; 1189267515Smav struct ctl_lba_len_flags *lbalen; 1190264274Smav uint64_t len_left, lba; 1191264274Smav int i, seglen; 1192264274Smav uint8_t *buf, *end; 1193264274Smav 1194264274Smav DPRINTF("entered\n"); 1195264274Smav 1196267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1197264274Smav softc = be_lun->softc; 1198267537Smav lbalen = ARGS(beio->io); 1199264274Smav 1200271839Smav if (lbalen->flags & ~(SWS_LBDATA | SWS_UNMAP | SWS_ANCHOR | SWS_NDOB) || 1201269622Smav (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR) && be_lun->unmap == NULL)) { 1202264274Smav ctl_free_beio(beio); 1203264274Smav ctl_set_invalid_field(&io->scsiio, 1204264274Smav /*sks_valid*/ 1, 1205264274Smav /*command*/ 1, 1206264274Smav /*field*/ 1, 1207264274Smav /*bit_valid*/ 0, 1208264274Smav /*bit*/ 0); 1209264274Smav ctl_config_write_done(io); 1210264274Smav return; 1211264274Smav } 1212264274Smav 1213264274Smav switch (io->scsiio.tag_type) { 1214264274Smav case CTL_TAG_ORDERED: 1215264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1216264274Smav break; 1217264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1218264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1219264274Smav break; 1220264274Smav case CTL_TAG_UNTAGGED: 1221264274Smav case CTL_TAG_SIMPLE: 1222264274Smav case CTL_TAG_ACA: 1223264274Smav default: 1224264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1225264274Smav break; 1226264274Smav } 1227264274Smav 1228269622Smav if (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR)) { 1229267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1230267515Smav beio->io_len = (uint64_t)lbalen->len * be_lun->blocksize; 1231264274Smav beio->bio_cmd = BIO_DELETE; 1232264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1233264274Smav 1234264274Smav be_lun->unmap(be_lun, beio); 1235264274Smav return; 1236264274Smav } 1237264274Smav 1238264274Smav beio->bio_cmd = BIO_WRITE; 1239264274Smav beio->ds_trans_type = DEVSTAT_WRITE; 1240264274Smav 1241264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1242267515Smav (uintmax_t)lbalen->lba, lbalen->len); 1243264274Smav 1244267515Smav len_left = (uint64_t)lbalen->len * be_lun->blocksize; 1245264274Smav for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) { 1246264274Smav 1247264274Smav /* 1248264274Smav * Setup the S/G entry for this chunk. 1249264274Smav */ 1250264886Smav seglen = MIN(CTLBLK_MAX_SEG, len_left); 1251264274Smav seglen -= seglen % be_lun->blocksize; 1252264274Smav beio->sg_segs[i].len = seglen; 1253264274Smav beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1254264274Smav 1255264274Smav DPRINTF("segment %d addr %p len %zd\n", i, 1256264274Smav beio->sg_segs[i].addr, beio->sg_segs[i].len); 1257264274Smav 1258264274Smav beio->num_segs++; 1259264274Smav len_left -= seglen; 1260264274Smav 1261264274Smav buf = beio->sg_segs[i].addr; 1262264274Smav end = buf + seglen; 1263264274Smav for (; buf < end; buf += be_lun->blocksize) { 1264264274Smav memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize); 1265267515Smav if (lbalen->flags & SWS_LBDATA) 1266267515Smav scsi_ulto4b(lbalen->lba + lba, buf); 1267264274Smav lba++; 1268264274Smav } 1269264274Smav } 1270264274Smav 1271267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1272264274Smav beio->io_len = lba * be_lun->blocksize; 1273264274Smav 1274264274Smav /* We can not do all in one run. Correct and schedule rerun. */ 1275264274Smav if (len_left > 0) { 1276267515Smav lbalen->lba += lba; 1277267515Smav lbalen->len -= lba; 1278264274Smav beio->beio_cont = ctl_be_block_cw_done_ws; 1279264274Smav } 1280264274Smav 1281264274Smav be_lun->dispatch(be_lun, beio); 1282264274Smav} 1283264274Smav 1284264274Smavstatic void 1285264274Smavctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun, 1286264274Smav union ctl_io *io) 1287264274Smav{ 1288264274Smav struct ctl_be_block_io *beio; 1289264274Smav struct ctl_be_block_softc *softc; 1290267515Smav struct ctl_ptr_len_flags *ptrlen; 1291264274Smav 1292264274Smav DPRINTF("entered\n"); 1293264274Smav 1294267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1295264274Smav softc = be_lun->softc; 1296267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1297264274Smav 1298269622Smav if ((ptrlen->flags & ~SU_ANCHOR) != 0 || be_lun->unmap == NULL) { 1299264274Smav ctl_free_beio(beio); 1300264274Smav ctl_set_invalid_field(&io->scsiio, 1301264274Smav /*sks_valid*/ 0, 1302264274Smav /*command*/ 1, 1303264274Smav /*field*/ 0, 1304264274Smav /*bit_valid*/ 0, 1305264274Smav /*bit*/ 0); 1306264274Smav ctl_config_write_done(io); 1307264274Smav return; 1308264274Smav } 1309264274Smav 1310264274Smav switch (io->scsiio.tag_type) { 1311264274Smav case CTL_TAG_ORDERED: 1312264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1313264274Smav break; 1314264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1315264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1316264274Smav break; 1317264274Smav case CTL_TAG_UNTAGGED: 1318264274Smav case CTL_TAG_SIMPLE: 1319264274Smav case CTL_TAG_ACA: 1320264274Smav default: 1321264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1322264274Smav break; 1323264274Smav } 1324264274Smav 1325264274Smav beio->io_len = 0; 1326264274Smav beio->io_offset = -1; 1327264274Smav 1328264274Smav beio->bio_cmd = BIO_DELETE; 1329264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1330264274Smav 1331267515Smav DPRINTF("UNMAP\n"); 1332264274Smav 1333264274Smav be_lun->unmap(be_lun, beio); 1334264274Smav} 1335264274Smav 1336264274Smavstatic void 1337275474Smavctl_be_block_cr_done(struct ctl_be_block_io *beio) 1338275474Smav{ 1339275474Smav union ctl_io *io; 1340275474Smav 1341275474Smav io = beio->io; 1342275474Smav ctl_free_beio(beio); 1343275474Smav ctl_config_read_done(io); 1344275474Smav} 1345275474Smav 1346275474Smavstatic void 1347275474Smavctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 1348275474Smav union ctl_io *io) 1349275474Smav{ 1350275474Smav struct ctl_be_block_io *beio; 1351275474Smav struct ctl_be_block_softc *softc; 1352275474Smav 1353275474Smav DPRINTF("entered\n"); 1354275474Smav 1355275474Smav softc = be_lun->softc; 1356275474Smav beio = ctl_alloc_beio(softc); 1357275474Smav beio->io = io; 1358275474Smav beio->lun = be_lun; 1359275474Smav beio->beio_cont = ctl_be_block_cr_done; 1360275474Smav PRIV(io)->ptr = (void *)beio; 1361275474Smav 1362275474Smav switch (io->scsiio.cdb[0]) { 1363275474Smav case SERVICE_ACTION_IN: /* GET LBA STATUS */ 1364275474Smav beio->bio_cmd = -1; 1365275474Smav beio->ds_trans_type = DEVSTAT_NO_DATA; 1366275474Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1367275474Smav beio->io_len = 0; 1368275474Smav if (be_lun->get_lba_status) 1369275474Smav be_lun->get_lba_status(be_lun, beio); 1370275474Smav else 1371275474Smav ctl_be_block_cr_done(beio); 1372275474Smav break; 1373275474Smav default: 1374275474Smav panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1375275474Smav break; 1376275474Smav } 1377275474Smav} 1378275474Smav 1379275474Smavstatic void 1380264274Smavctl_be_block_cw_done(struct ctl_be_block_io *beio) 1381264274Smav{ 1382264274Smav union ctl_io *io; 1383264274Smav 1384264274Smav io = beio->io; 1385264274Smav ctl_free_beio(beio); 1386264274Smav ctl_config_write_done(io); 1387264274Smav} 1388264274Smav 1389264274Smavstatic void 1390229997Skenctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 1391229997Sken union ctl_io *io) 1392229997Sken{ 1393229997Sken struct ctl_be_block_io *beio; 1394229997Sken struct ctl_be_block_softc *softc; 1395229997Sken 1396229997Sken DPRINTF("entered\n"); 1397229997Sken 1398229997Sken softc = be_lun->softc; 1399229997Sken beio = ctl_alloc_beio(softc); 1400229997Sken beio->io = io; 1401229997Sken beio->lun = be_lun; 1402264274Smav beio->beio_cont = ctl_be_block_cw_done; 1403267519Smav PRIV(io)->ptr = (void *)beio; 1404229997Sken 1405229997Sken switch (io->scsiio.cdb[0]) { 1406229997Sken case SYNCHRONIZE_CACHE: 1407229997Sken case SYNCHRONIZE_CACHE_16: 1408249194Strasz beio->bio_cmd = BIO_FLUSH; 1409229997Sken beio->ds_trans_type = DEVSTAT_NO_DATA; 1410229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1411229997Sken beio->io_len = 0; 1412229997Sken be_lun->lun_flush(be_lun, beio); 1413229997Sken break; 1414264274Smav case WRITE_SAME_10: 1415264274Smav case WRITE_SAME_16: 1416264274Smav ctl_be_block_cw_dispatch_ws(be_lun, io); 1417264274Smav break; 1418264274Smav case UNMAP: 1419264274Smav ctl_be_block_cw_dispatch_unmap(be_lun, io); 1420264274Smav break; 1421229997Sken default: 1422229997Sken panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1423229997Sken break; 1424229997Sken } 1425229997Sken} 1426229997Sken 1427258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t"); 1428258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t"); 1429258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t"); 1430258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t"); 1431229997Sken 1432229997Skenstatic void 1433264886Smavctl_be_block_next(struct ctl_be_block_io *beio) 1434264886Smav{ 1435264886Smav struct ctl_be_block_lun *be_lun; 1436264886Smav union ctl_io *io; 1437264886Smav 1438264886Smav io = beio->io; 1439264886Smav be_lun = beio->lun; 1440264886Smav ctl_free_beio(beio); 1441267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1442267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1443267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1444267537Smav ctl_data_submit_done(io); 1445264886Smav return; 1446264886Smav } 1447264886Smav 1448264886Smav io->io_hdr.status &= ~CTL_STATUS_MASK; 1449264886Smav io->io_hdr.status |= CTL_STATUS_NONE; 1450264886Smav 1451267877Smav mtx_lock(&be_lun->queue_lock); 1452264886Smav /* 1453264886Smav * XXX KDM make sure that links is okay to use at this point. 1454264886Smav * Otherwise, we either need to add another field to ctl_io_hdr, 1455264886Smav * or deal with resource allocation here. 1456264886Smav */ 1457264886Smav STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1458267877Smav mtx_unlock(&be_lun->queue_lock); 1459264886Smav 1460264886Smav taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1461264886Smav} 1462264886Smav 1463264886Smavstatic void 1464229997Skenctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 1465229997Sken union ctl_io *io) 1466229997Sken{ 1467229997Sken struct ctl_be_block_io *beio; 1468229997Sken struct ctl_be_block_softc *softc; 1469267537Smav struct ctl_lba_len_flags *lbalen; 1470267519Smav struct ctl_ptr_len_flags *bptrlen; 1471267519Smav uint64_t len_left, lbas; 1472229997Sken int i; 1473229997Sken 1474229997Sken softc = be_lun->softc; 1475229997Sken 1476229997Sken DPRINTF("entered\n"); 1477229997Sken 1478267537Smav lbalen = ARGS(io); 1479267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1480267537Smav SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0); 1481267537Smav } else { 1482229997Sken SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0); 1483229997Sken } 1484229997Sken 1485229997Sken beio = ctl_alloc_beio(softc); 1486229997Sken beio->io = io; 1487229997Sken beio->lun = be_lun; 1488267519Smav bptrlen = PRIV(io); 1489267519Smav bptrlen->ptr = (void *)beio; 1490229997Sken 1491229997Sken switch (io->scsiio.tag_type) { 1492229997Sken case CTL_TAG_ORDERED: 1493229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1494229997Sken break; 1495229997Sken case CTL_TAG_HEAD_OF_QUEUE: 1496229997Sken beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1497229997Sken break; 1498229997Sken case CTL_TAG_UNTAGGED: 1499229997Sken case CTL_TAG_SIMPLE: 1500229997Sken case CTL_TAG_ACA: 1501229997Sken default: 1502229997Sken beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1503229997Sken break; 1504229997Sken } 1505229997Sken 1506267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1507267537Smav beio->bio_cmd = BIO_WRITE; 1508267537Smav beio->ds_trans_type = DEVSTAT_WRITE; 1509267537Smav } else { 1510229997Sken beio->bio_cmd = BIO_READ; 1511229997Sken beio->ds_trans_type = DEVSTAT_READ; 1512229997Sken } 1513229997Sken 1514264886Smav DPRINTF("%s at LBA %jx len %u @%ju\n", 1515229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", 1516267519Smav (uintmax_t)lbalen->lba, lbalen->len, bptrlen->len); 1517267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1518267537Smav lbas = CTLBLK_HALF_IO_SIZE; 1519267537Smav else 1520267537Smav lbas = CTLBLK_MAX_IO_SIZE; 1521267537Smav lbas = MIN(lbalen->len - bptrlen->len, lbas / be_lun->blocksize); 1522267519Smav beio->io_offset = (lbalen->lba + bptrlen->len) * be_lun->blocksize; 1523267519Smav beio->io_len = lbas * be_lun->blocksize; 1524267519Smav bptrlen->len += lbas; 1525229997Sken 1526264886Smav for (i = 0, len_left = beio->io_len; len_left > 0; i++) { 1527264886Smav KASSERT(i < CTLBLK_MAX_SEGS, ("Too many segs (%d >= %d)", 1528264886Smav i, CTLBLK_MAX_SEGS)); 1529229997Sken 1530229997Sken /* 1531229997Sken * Setup the S/G entry for this chunk. 1532229997Sken */ 1533264886Smav beio->sg_segs[i].len = min(CTLBLK_MAX_SEG, len_left); 1534229997Sken beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1535229997Sken 1536229997Sken DPRINTF("segment %d addr %p len %zd\n", i, 1537229997Sken beio->sg_segs[i].addr, beio->sg_segs[i].len); 1538229997Sken 1539267537Smav /* Set up second segment for compare operation. */ 1540267537Smav if (lbalen->flags & CTL_LLF_COMPARE) { 1541267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].len = 1542267537Smav beio->sg_segs[i].len; 1543267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = 1544267537Smav uma_zalloc(be_lun->lun_zone, M_WAITOK); 1545267537Smav } 1546267537Smav 1547229997Sken beio->num_segs++; 1548229997Sken len_left -= beio->sg_segs[i].len; 1549229997Sken } 1550267519Smav if (bptrlen->len < lbalen->len) 1551264886Smav beio->beio_cont = ctl_be_block_next; 1552264886Smav io->scsiio.be_move_done = ctl_be_block_move_done; 1553267537Smav /* For compare we have separate S/G lists for read and datamove. */ 1554267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1555267537Smav io->scsiio.kern_data_ptr = (uint8_t *)&beio->sg_segs[CTLBLK_HALF_SEGS]; 1556267537Smav else 1557267537Smav io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 1558264886Smav io->scsiio.kern_data_len = beio->io_len; 1559264886Smav io->scsiio.kern_data_resid = 0; 1560264886Smav io->scsiio.kern_sg_entries = beio->num_segs; 1561264886Smav io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 1562229997Sken 1563229997Sken /* 1564229997Sken * For the read case, we need to read the data into our buffers and 1565229997Sken * then we can send it back to the user. For the write case, we 1566229997Sken * need to get the data from the user first. 1567229997Sken */ 1568229997Sken if (beio->bio_cmd == BIO_READ) { 1569229997Sken SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0); 1570229997Sken be_lun->dispatch(be_lun, beio); 1571229997Sken } else { 1572229997Sken SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0); 1573229997Sken#ifdef CTL_TIME_IO 1574229997Sken getbintime(&io->io_hdr.dma_start_bt); 1575229997Sken#endif 1576229997Sken ctl_datamove(io); 1577229997Sken } 1578229997Sken} 1579229997Sken 1580229997Skenstatic void 1581229997Skenctl_be_block_worker(void *context, int pending) 1582229997Sken{ 1583229997Sken struct ctl_be_block_lun *be_lun; 1584229997Sken struct ctl_be_block_softc *softc; 1585229997Sken union ctl_io *io; 1586229997Sken 1587229997Sken be_lun = (struct ctl_be_block_lun *)context; 1588229997Sken softc = be_lun->softc; 1589229997Sken 1590229997Sken DPRINTF("entered\n"); 1591229997Sken 1592267877Smav mtx_lock(&be_lun->queue_lock); 1593229997Sken for (;;) { 1594229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue); 1595229997Sken if (io != NULL) { 1596229997Sken struct ctl_be_block_io *beio; 1597229997Sken 1598229997Sken DPRINTF("datamove queue\n"); 1599229997Sken 1600229997Sken STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr, 1601229997Sken ctl_io_hdr, links); 1602229997Sken 1603267877Smav mtx_unlock(&be_lun->queue_lock); 1604229997Sken 1605267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1606229997Sken 1607229997Sken be_lun->dispatch(be_lun, beio); 1608229997Sken 1609267877Smav mtx_lock(&be_lun->queue_lock); 1610229997Sken continue; 1611229997Sken } 1612229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue); 1613229997Sken if (io != NULL) { 1614229997Sken DPRINTF("config write queue\n"); 1615229997Sken STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr, 1616229997Sken ctl_io_hdr, links); 1617267877Smav mtx_unlock(&be_lun->queue_lock); 1618229997Sken ctl_be_block_cw_dispatch(be_lun, io); 1619267877Smav mtx_lock(&be_lun->queue_lock); 1620229997Sken continue; 1621229997Sken } 1622275474Smav io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_read_queue); 1623275474Smav if (io != NULL) { 1624275474Smav DPRINTF("config read queue\n"); 1625275474Smav STAILQ_REMOVE(&be_lun->config_read_queue, &io->io_hdr, 1626275474Smav ctl_io_hdr, links); 1627275474Smav mtx_unlock(&be_lun->queue_lock); 1628275474Smav ctl_be_block_cr_dispatch(be_lun, io); 1629275474Smav mtx_lock(&be_lun->queue_lock); 1630275474Smav continue; 1631275474Smav } 1632229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue); 1633229997Sken if (io != NULL) { 1634229997Sken DPRINTF("input queue\n"); 1635229997Sken 1636229997Sken STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr, 1637229997Sken ctl_io_hdr, links); 1638267877Smav mtx_unlock(&be_lun->queue_lock); 1639229997Sken 1640229997Sken /* 1641229997Sken * We must drop the lock, since this routine and 1642229997Sken * its children may sleep. 1643229997Sken */ 1644229997Sken ctl_be_block_dispatch(be_lun, io); 1645229997Sken 1646267877Smav mtx_lock(&be_lun->queue_lock); 1647229997Sken continue; 1648229997Sken } 1649229997Sken 1650229997Sken /* 1651229997Sken * If we get here, there is no work left in the queues, so 1652229997Sken * just break out and let the task queue go to sleep. 1653229997Sken */ 1654229997Sken break; 1655229997Sken } 1656267877Smav mtx_unlock(&be_lun->queue_lock); 1657229997Sken} 1658229997Sken 1659229997Sken/* 1660229997Sken * Entry point from CTL to the backend for I/O. We queue everything to a 1661229997Sken * work thread, so this just puts the I/O on a queue and wakes up the 1662229997Sken * thread. 1663229997Sken */ 1664229997Skenstatic int 1665229997Skenctl_be_block_submit(union ctl_io *io) 1666229997Sken{ 1667229997Sken struct ctl_be_block_lun *be_lun; 1668229997Sken struct ctl_be_lun *ctl_be_lun; 1669229997Sken 1670229997Sken DPRINTF("entered\n"); 1671229997Sken 1672229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 1673229997Sken CTL_PRIV_BACKEND_LUN].ptr; 1674229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 1675229997Sken 1676229997Sken /* 1677229997Sken * Make sure we only get SCSI I/O. 1678229997Sken */ 1679229997Sken KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type " 1680229997Sken "%#x) encountered", io->io_hdr.io_type)); 1681229997Sken 1682267519Smav PRIV(io)->len = 0; 1683267519Smav 1684267877Smav mtx_lock(&be_lun->queue_lock); 1685229997Sken /* 1686229997Sken * XXX KDM make sure that links is okay to use at this point. 1687229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 1688229997Sken * or deal with resource allocation here. 1689229997Sken */ 1690229997Sken STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1691267877Smav mtx_unlock(&be_lun->queue_lock); 1692229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1693229997Sken 1694267514Smav return (CTL_RETVAL_COMPLETE); 1695229997Sken} 1696229997Sken 1697229997Skenstatic int 1698229997Skenctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 1699229997Sken int flag, struct thread *td) 1700229997Sken{ 1701229997Sken struct ctl_be_block_softc *softc; 1702229997Sken int error; 1703229997Sken 1704229997Sken softc = &backend_block_softc; 1705229997Sken 1706229997Sken error = 0; 1707229997Sken 1708229997Sken switch (cmd) { 1709229997Sken case CTL_LUN_REQ: { 1710229997Sken struct ctl_lun_req *lun_req; 1711229997Sken 1712229997Sken lun_req = (struct ctl_lun_req *)addr; 1713229997Sken 1714229997Sken switch (lun_req->reqtype) { 1715229997Sken case CTL_LUNREQ_CREATE: 1716229997Sken error = ctl_be_block_create(softc, lun_req); 1717229997Sken break; 1718229997Sken case CTL_LUNREQ_RM: 1719229997Sken error = ctl_be_block_rm(softc, lun_req); 1720229997Sken break; 1721232604Strasz case CTL_LUNREQ_MODIFY: 1722232604Strasz error = ctl_be_block_modify(softc, lun_req); 1723232604Strasz break; 1724229997Sken default: 1725229997Sken lun_req->status = CTL_LUN_ERROR; 1726229997Sken snprintf(lun_req->error_str, sizeof(lun_req->error_str), 1727272911Smav "invalid LUN request type %d", 1728229997Sken lun_req->reqtype); 1729229997Sken break; 1730229997Sken } 1731229997Sken break; 1732229997Sken } 1733229997Sken default: 1734229997Sken error = ENOTTY; 1735229997Sken break; 1736229997Sken } 1737229997Sken 1738229997Sken return (error); 1739229997Sken} 1740229997Sken 1741229997Skenstatic int 1742229997Skenctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1743229997Sken{ 1744229997Sken struct ctl_be_block_filedata *file_data; 1745229997Sken struct ctl_lun_create_params *params; 1746275865Smav char *value; 1747229997Sken struct vattr vattr; 1748275865Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1749229997Sken int error; 1750229997Sken 1751229997Sken error = 0; 1752229997Sken file_data = &be_lun->backend.file; 1753272911Smav params = &be_lun->params; 1754229997Sken 1755229997Sken be_lun->dev_type = CTL_BE_BLOCK_FILE; 1756229997Sken be_lun->dispatch = ctl_be_block_dispatch_file; 1757229997Sken be_lun->lun_flush = ctl_be_block_flush_file; 1758275474Smav be_lun->get_lba_status = ctl_be_block_gls_file; 1759275481Smav be_lun->getattr = ctl_be_block_getattr_file; 1760229997Sken 1761229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 1762229997Sken if (error != 0) { 1763229997Sken snprintf(req->error_str, sizeof(req->error_str), 1764229997Sken "error calling VOP_GETATTR() for file %s", 1765229997Sken be_lun->dev_path); 1766229997Sken return (error); 1767229997Sken } 1768229997Sken 1769229997Sken /* 1770229997Sken * Verify that we have the ability to upgrade to exclusive 1771229997Sken * access on this file so we can trap errors at open instead 1772229997Sken * of reporting them during first access. 1773229997Sken */ 1774229997Sken if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) { 1775229997Sken vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY); 1776229997Sken if (be_lun->vn->v_iflag & VI_DOOMED) { 1777229997Sken error = EBADF; 1778229997Sken snprintf(req->error_str, sizeof(req->error_str), 1779229997Sken "error locking file %s", be_lun->dev_path); 1780229997Sken return (error); 1781229997Sken } 1782229997Sken } 1783229997Sken 1784229997Sken 1785229997Sken file_data->cred = crhold(curthread->td_ucred); 1786232604Strasz if (params->lun_size_bytes != 0) 1787232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1788232604Strasz else 1789232604Strasz be_lun->size_bytes = vattr.va_size; 1790229997Sken /* 1791229997Sken * We set the multi thread flag for file operations because all 1792229997Sken * filesystems (in theory) are capable of allowing multiple readers 1793229997Sken * of a file at once. So we want to get the maximum possible 1794229997Sken * concurrency. 1795229997Sken */ 1796229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD; 1797229997Sken 1798229997Sken /* 1799273029Smav * For files we can use any logical block size. Prefer 512 bytes 1800273029Smav * for compatibility reasons. If file's vattr.va_blocksize 1801273029Smav * (preferred I/O block size) is bigger and multiple to chosen 1802273029Smav * logical block size -- report it as physical block size. 1803229997Sken */ 1804229997Sken if (params->blocksize_bytes != 0) 1805229997Sken be_lun->blocksize = params->blocksize_bytes; 1806229997Sken else 1807229997Sken be_lun->blocksize = 512; 1808275865Smav 1809275865Smav us = ps = vattr.va_blocksize; 1810275865Smav uo = po = 0; 1811275865Smav 1812275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1813275865Smav if (value != NULL) 1814275865Smav ctl_expand_number(value, &ps); 1815275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1816275865Smav if (value != NULL) 1817275865Smav ctl_expand_number(value, &po); 1818275865Smav pss = ps / be_lun->blocksize; 1819275865Smav pos = po / be_lun->blocksize; 1820275865Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1821275865Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1822273029Smav be_lun->pblockexp = fls(pss) - 1; 1823275865Smav be_lun->pblockoff = (pss - pos) % pss; 1824273029Smav } 1825229997Sken 1826275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 1827275865Smav if (value != NULL) 1828275865Smav ctl_expand_number(value, &us); 1829275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 1830275865Smav if (value != NULL) 1831275865Smav ctl_expand_number(value, &uo); 1832275865Smav uss = us / be_lun->blocksize; 1833275865Smav uos = uo / be_lun->blocksize; 1834275865Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 1835275865Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 1836275865Smav be_lun->ublockexp = fls(uss) - 1; 1837275865Smav be_lun->ublockoff = (uss - uos) % uss; 1838275865Smav } 1839275865Smav 1840229997Sken /* 1841229997Sken * Sanity check. The media size has to be at least one 1842229997Sken * sector long. 1843229997Sken */ 1844229997Sken if (be_lun->size_bytes < be_lun->blocksize) { 1845229997Sken error = EINVAL; 1846229997Sken snprintf(req->error_str, sizeof(req->error_str), 1847229997Sken "file %s size %ju < block size %u", be_lun->dev_path, 1848229997Sken (uintmax_t)be_lun->size_bytes, be_lun->blocksize); 1849229997Sken } 1850275920Smav 1851275920Smav be_lun->opttxferlen = CTLBLK_MAX_IO_SIZE / be_lun->blocksize; 1852229997Sken return (error); 1853229997Sken} 1854229997Sken 1855229997Skenstatic int 1856229997Skenctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1857229997Sken{ 1858229997Sken struct ctl_lun_create_params *params; 1859229997Sken struct vattr vattr; 1860229997Sken struct cdev *dev; 1861229997Sken struct cdevsw *devsw; 1862275865Smav char *value; 1863275920Smav int error, atomic, maxio; 1864275865Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1865229997Sken 1866272911Smav params = &be_lun->params; 1867229997Sken 1868229997Sken be_lun->dev_type = CTL_BE_BLOCK_DEV; 1869229997Sken be_lun->backend.dev.cdev = be_lun->vn->v_rdev; 1870229997Sken be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev, 1871229997Sken &be_lun->backend.dev.dev_ref); 1872229997Sken if (be_lun->backend.dev.csw == NULL) 1873229997Sken panic("Unable to retrieve device switch"); 1874275474Smav if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) { 1875269123Smav be_lun->dispatch = ctl_be_block_dispatch_zvol; 1876275474Smav be_lun->get_lba_status = ctl_be_block_gls_zvol; 1877275920Smav atomic = maxio = CTLBLK_MAX_IO_SIZE; 1878275920Smav } else { 1879269123Smav be_lun->dispatch = ctl_be_block_dispatch_dev; 1880275920Smav atomic = 0; 1881275920Smav maxio = be_lun->backend.dev.cdev->si_iosize_max; 1882275920Smav if (maxio <= 0) 1883275920Smav maxio = DFLTPHYS; 1884275920Smav if (maxio > CTLBLK_MAX_IO_SIZE) 1885275920Smav maxio = CTLBLK_MAX_IO_SIZE; 1886275920Smav } 1887269123Smav be_lun->lun_flush = ctl_be_block_flush_dev; 1888269123Smav be_lun->unmap = ctl_be_block_unmap_dev; 1889274154Smav be_lun->getattr = ctl_be_block_getattr_dev; 1890229997Sken 1891229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED); 1892229997Sken if (error) { 1893229997Sken snprintf(req->error_str, sizeof(req->error_str), 1894272911Smav "error getting vnode attributes for device %s", 1895272911Smav be_lun->dev_path); 1896229997Sken return (error); 1897229997Sken } 1898229997Sken 1899229997Sken dev = be_lun->vn->v_rdev; 1900229997Sken devsw = dev->si_devsw; 1901229997Sken if (!devsw->d_ioctl) { 1902229997Sken snprintf(req->error_str, sizeof(req->error_str), 1903272911Smav "no d_ioctl for device %s!", 1904229997Sken be_lun->dev_path); 1905229997Sken return (ENODEV); 1906229997Sken } 1907229997Sken 1908229997Sken error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, 1909229997Sken (caddr_t)&be_lun->blocksize, FREAD, 1910229997Sken curthread); 1911229997Sken if (error) { 1912229997Sken snprintf(req->error_str, sizeof(req->error_str), 1913272911Smav "error %d returned for DIOCGSECTORSIZE ioctl " 1914272911Smav "on %s!", error, be_lun->dev_path); 1915229997Sken return (error); 1916229997Sken } 1917229997Sken 1918229997Sken /* 1919229997Sken * If the user has asked for a blocksize that is greater than the 1920229997Sken * backing device's blocksize, we can do it only if the blocksize 1921229997Sken * the user is asking for is an even multiple of the underlying 1922229997Sken * device's blocksize. 1923229997Sken */ 1924229997Sken if ((params->blocksize_bytes != 0) 1925229997Sken && (params->blocksize_bytes > be_lun->blocksize)) { 1926229997Sken uint32_t bs_multiple, tmp_blocksize; 1927229997Sken 1928229997Sken bs_multiple = params->blocksize_bytes / be_lun->blocksize; 1929229997Sken 1930229997Sken tmp_blocksize = bs_multiple * be_lun->blocksize; 1931229997Sken 1932229997Sken if (tmp_blocksize == params->blocksize_bytes) { 1933229997Sken be_lun->blocksize = params->blocksize_bytes; 1934229997Sken } else { 1935229997Sken snprintf(req->error_str, sizeof(req->error_str), 1936272911Smav "requested blocksize %u is not an even " 1937229997Sken "multiple of backing device blocksize %u", 1938272911Smav params->blocksize_bytes, 1939229997Sken be_lun->blocksize); 1940229997Sken return (EINVAL); 1941229997Sken 1942229997Sken } 1943229997Sken } else if ((params->blocksize_bytes != 0) 1944229997Sken && (params->blocksize_bytes != be_lun->blocksize)) { 1945229997Sken snprintf(req->error_str, sizeof(req->error_str), 1946272911Smav "requested blocksize %u < backing device " 1947272911Smav "blocksize %u", params->blocksize_bytes, 1948229997Sken be_lun->blocksize); 1949229997Sken return (EINVAL); 1950229997Sken } 1951229997Sken 1952229997Sken error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 1953229997Sken (caddr_t)&be_lun->size_bytes, FREAD, 1954229997Sken curthread); 1955229997Sken if (error) { 1956229997Sken snprintf(req->error_str, sizeof(req->error_str), 1957272911Smav "error %d returned for DIOCGMEDIASIZE " 1958272911Smav " ioctl on %s!", error, 1959232604Strasz be_lun->dev_path); 1960229997Sken return (error); 1961229997Sken } 1962229997Sken 1963232604Strasz if (params->lun_size_bytes != 0) { 1964232604Strasz if (params->lun_size_bytes > be_lun->size_bytes) { 1965232604Strasz snprintf(req->error_str, sizeof(req->error_str), 1966272911Smav "requested LUN size %ju > backing device " 1967272911Smav "size %ju", 1968232604Strasz (uintmax_t)params->lun_size_bytes, 1969232604Strasz (uintmax_t)be_lun->size_bytes); 1970232604Strasz return (EINVAL); 1971232604Strasz } 1972232604Strasz 1973232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1974232604Strasz } 1975232604Strasz 1976264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE, 1977264191Smav (caddr_t)&ps, FREAD, curthread); 1978264191Smav if (error) 1979264191Smav ps = po = 0; 1980264191Smav else { 1981264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET, 1982264191Smav (caddr_t)&po, FREAD, curthread); 1983264191Smav if (error) 1984264191Smav po = 0; 1985264191Smav } 1986275865Smav us = ps; 1987275865Smav uo = po; 1988275865Smav 1989275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1990275865Smav if (value != NULL) 1991275865Smav ctl_expand_number(value, &ps); 1992275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1993275865Smav if (value != NULL) 1994275865Smav ctl_expand_number(value, &po); 1995264191Smav pss = ps / be_lun->blocksize; 1996264191Smav pos = po / be_lun->blocksize; 1997264191Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1998264191Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1999264191Smav be_lun->pblockexp = fls(pss) - 1; 2000264191Smav be_lun->pblockoff = (pss - pos) % pss; 2001264191Smav } 2002264191Smav 2003275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 2004275865Smav if (value != NULL) 2005275865Smav ctl_expand_number(value, &us); 2006275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 2007275865Smav if (value != NULL) 2008275865Smav ctl_expand_number(value, &uo); 2009275865Smav uss = us / be_lun->blocksize; 2010275865Smav uos = uo / be_lun->blocksize; 2011275865Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 2012275865Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 2013275865Smav be_lun->ublockexp = fls(uss) - 1; 2014275865Smav be_lun->ublockoff = (uss - uos) % uss; 2015275865Smav } 2016275865Smav 2017275920Smav be_lun->atomicblock = atomic / be_lun->blocksize; 2018275920Smav be_lun->opttxferlen = maxio / be_lun->blocksize; 2019229997Sken return (0); 2020229997Sken} 2021229997Sken 2022229997Skenstatic int 2023229997Skenctl_be_block_close(struct ctl_be_block_lun *be_lun) 2024229997Sken{ 2025229997Sken DROP_GIANT(); 2026229997Sken if (be_lun->vn) { 2027229997Sken int flags = FREAD | FWRITE; 2028229997Sken 2029229997Sken switch (be_lun->dev_type) { 2030229997Sken case CTL_BE_BLOCK_DEV: 2031229997Sken if (be_lun->backend.dev.csw) { 2032229997Sken dev_relthread(be_lun->backend.dev.cdev, 2033229997Sken be_lun->backend.dev.dev_ref); 2034229997Sken be_lun->backend.dev.csw = NULL; 2035229997Sken be_lun->backend.dev.cdev = NULL; 2036229997Sken } 2037229997Sken break; 2038229997Sken case CTL_BE_BLOCK_FILE: 2039229997Sken break; 2040229997Sken case CTL_BE_BLOCK_NONE: 2041258871Strasz break; 2042229997Sken default: 2043229997Sken panic("Unexpected backend type."); 2044229997Sken break; 2045229997Sken } 2046229997Sken 2047229997Sken (void)vn_close(be_lun->vn, flags, NOCRED, curthread); 2048229997Sken be_lun->vn = NULL; 2049229997Sken 2050229997Sken switch (be_lun->dev_type) { 2051229997Sken case CTL_BE_BLOCK_DEV: 2052229997Sken break; 2053229997Sken case CTL_BE_BLOCK_FILE: 2054229997Sken if (be_lun->backend.file.cred != NULL) { 2055229997Sken crfree(be_lun->backend.file.cred); 2056229997Sken be_lun->backend.file.cred = NULL; 2057229997Sken } 2058229997Sken break; 2059229997Sken case CTL_BE_BLOCK_NONE: 2060258871Strasz break; 2061229997Sken default: 2062229997Sken panic("Unexpected backend type."); 2063229997Sken break; 2064229997Sken } 2065272911Smav be_lun->dev_type = CTL_BE_BLOCK_NONE; 2066229997Sken } 2067229997Sken PICKUP_GIANT(); 2068229997Sken 2069229997Sken return (0); 2070229997Sken} 2071229997Sken 2072229997Skenstatic int 2073229997Skenctl_be_block_open(struct ctl_be_block_softc *softc, 2074229997Sken struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 2075229997Sken{ 2076229997Sken struct nameidata nd; 2077229997Sken int flags; 2078229997Sken int error; 2079229997Sken 2080229997Sken /* 2081229997Sken * XXX KDM allow a read-only option? 2082229997Sken */ 2083229997Sken flags = FREAD | FWRITE; 2084229997Sken error = 0; 2085229997Sken 2086229997Sken if (rootvnode == NULL) { 2087229997Sken snprintf(req->error_str, sizeof(req->error_str), 2088272911Smav "Root filesystem is not mounted"); 2089229997Sken return (1); 2090229997Sken } 2091229997Sken 2092229997Sken if (!curthread->td_proc->p_fd->fd_cdir) { 2093229997Sken curthread->td_proc->p_fd->fd_cdir = rootvnode; 2094229997Sken VREF(rootvnode); 2095229997Sken } 2096229997Sken if (!curthread->td_proc->p_fd->fd_rdir) { 2097229997Sken curthread->td_proc->p_fd->fd_rdir = rootvnode; 2098229997Sken VREF(rootvnode); 2099229997Sken } 2100229997Sken if (!curthread->td_proc->p_fd->fd_jdir) { 2101229997Sken curthread->td_proc->p_fd->fd_jdir = rootvnode; 2102229997Sken VREF(rootvnode); 2103229997Sken } 2104229997Sken 2105229997Sken again: 2106229997Sken NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread); 2107229997Sken error = vn_open(&nd, &flags, 0, NULL); 2108229997Sken if (error) { 2109229997Sken /* 2110229997Sken * This is the only reasonable guess we can make as far as 2111229997Sken * path if the user doesn't give us a fully qualified path. 2112229997Sken * If they want to specify a file, they need to specify the 2113229997Sken * full path. 2114229997Sken */ 2115229997Sken if (be_lun->dev_path[0] != '/') { 2116229997Sken char *dev_path = "/dev/"; 2117229997Sken char *dev_name; 2118229997Sken 2119229997Sken /* Try adding device path at beginning of name */ 2120229997Sken dev_name = malloc(strlen(be_lun->dev_path) 2121229997Sken + strlen(dev_path) + 1, 2122229997Sken M_CTLBLK, M_WAITOK); 2123229997Sken if (dev_name) { 2124229997Sken sprintf(dev_name, "%s%s", dev_path, 2125229997Sken be_lun->dev_path); 2126229997Sken free(be_lun->dev_path, M_CTLBLK); 2127229997Sken be_lun->dev_path = dev_name; 2128229997Sken goto again; 2129229997Sken } 2130229997Sken } 2131229997Sken snprintf(req->error_str, sizeof(req->error_str), 2132272911Smav "error opening %s: %d", be_lun->dev_path, error); 2133229997Sken return (error); 2134229997Sken } 2135229997Sken 2136229997Sken NDFREE(&nd, NDF_ONLY_PNBUF); 2137229997Sken 2138229997Sken be_lun->vn = nd.ni_vp; 2139229997Sken 2140229997Sken /* We only support disks and files. */ 2141229997Sken if (vn_isdisk(be_lun->vn, &error)) { 2142229997Sken error = ctl_be_block_open_dev(be_lun, req); 2143229997Sken } else if (be_lun->vn->v_type == VREG) { 2144229997Sken error = ctl_be_block_open_file(be_lun, req); 2145229997Sken } else { 2146229997Sken error = EINVAL; 2147229997Sken snprintf(req->error_str, sizeof(req->error_str), 2148258871Strasz "%s is not a disk or plain file", be_lun->dev_path); 2149229997Sken } 2150229997Sken VOP_UNLOCK(be_lun->vn, 0); 2151229997Sken 2152229997Sken if (error != 0) { 2153229997Sken ctl_be_block_close(be_lun); 2154229997Sken return (error); 2155229997Sken } 2156229997Sken 2157229997Sken be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2158229997Sken be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 2159229997Sken 2160229997Sken return (0); 2161229997Sken} 2162229997Sken 2163229997Skenstatic int 2164229997Skenctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2165229997Sken{ 2166229997Sken struct ctl_be_block_lun *be_lun; 2167229997Sken struct ctl_lun_create_params *params; 2168267481Smav char num_thread_str[16]; 2169229997Sken char tmpstr[32]; 2170267481Smav char *value; 2171264274Smav int retval, num_threads, unmap; 2172267481Smav int tmp_num_threads; 2173229997Sken 2174229997Sken params = &req->reqdata.create; 2175229997Sken retval = 0; 2176272911Smav req->status = CTL_LUN_OK; 2177229997Sken 2178229997Sken num_threads = cbb_num_threads; 2179229997Sken 2180229997Sken be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK); 2181229997Sken 2182272911Smav be_lun->params = req->reqdata.create; 2183229997Sken be_lun->softc = softc; 2184229997Sken STAILQ_INIT(&be_lun->input_queue); 2185275474Smav STAILQ_INIT(&be_lun->config_read_queue); 2186229997Sken STAILQ_INIT(&be_lun->config_write_queue); 2187229997Sken STAILQ_INIT(&be_lun->datamove_queue); 2188229997Sken sprintf(be_lun->lunname, "cblk%d", softc->num_luns); 2189267877Smav mtx_init(&be_lun->io_lock, "cblk io lock", NULL, MTX_DEF); 2190267877Smav mtx_init(&be_lun->queue_lock, "cblk queue lock", NULL, MTX_DEF); 2191268280Smav ctl_init_opts(&be_lun->ctl_be_lun.options, 2192268280Smav req->num_be_args, req->kern_be_args); 2193229997Sken 2194264886Smav be_lun->lun_zone = uma_zcreate(be_lun->lunname, CTLBLK_MAX_SEG, 2195256995Smav NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0); 2196229997Sken 2197229997Sken if (be_lun->lun_zone == NULL) { 2198229997Sken snprintf(req->error_str, sizeof(req->error_str), 2199272911Smav "error allocating UMA zone"); 2200229997Sken goto bailout_error; 2201229997Sken } 2202229997Sken 2203229997Sken if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 2204229997Sken be_lun->ctl_be_lun.lun_type = params->device_type; 2205229997Sken else 2206229997Sken be_lun->ctl_be_lun.lun_type = T_DIRECT; 2207229997Sken 2208229997Sken if (be_lun->ctl_be_lun.lun_type == T_DIRECT) { 2209268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "file"); 2210267499Smav if (value == NULL) { 2211229997Sken snprintf(req->error_str, sizeof(req->error_str), 2212272911Smav "no file argument specified"); 2213229997Sken goto bailout_error; 2214229997Sken } 2215267499Smav be_lun->dev_path = strdup(value, M_CTLBLK); 2216272911Smav be_lun->blocksize = 512; 2217272911Smav be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2218229997Sken 2219229997Sken retval = ctl_be_block_open(softc, be_lun, req); 2220229997Sken if (retval != 0) { 2221229997Sken retval = 0; 2222272911Smav req->status = CTL_LUN_WARNING; 2223229997Sken } 2224229997Sken } else { 2225229997Sken /* 2226229997Sken * For processor devices, we don't have any size. 2227229997Sken */ 2228229997Sken be_lun->blocksize = 0; 2229264191Smav be_lun->pblockexp = 0; 2230264191Smav be_lun->pblockoff = 0; 2231275865Smav be_lun->ublockexp = 0; 2232275865Smav be_lun->ublockoff = 0; 2233229997Sken be_lun->size_blocks = 0; 2234229997Sken be_lun->size_bytes = 0; 2235229997Sken be_lun->ctl_be_lun.maxlba = 0; 2236229997Sken 2237229997Sken /* 2238229997Sken * Default to just 1 thread for processor devices. 2239229997Sken */ 2240229997Sken num_threads = 1; 2241229997Sken } 2242229997Sken 2243229997Sken /* 2244229997Sken * XXX This searching loop might be refactored to be combined with 2245229997Sken * the loop above, 2246229997Sken */ 2247268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "num_threads"); 2248267481Smav if (value != NULL) { 2249267481Smav tmp_num_threads = strtol(value, NULL, 0); 2250229997Sken 2251267481Smav /* 2252267481Smav * We don't let the user specify less than one 2253267481Smav * thread, but hope he's clueful enough not to 2254267481Smav * specify 1000 threads. 2255267481Smav */ 2256267481Smav if (tmp_num_threads < 1) { 2257267481Smav snprintf(req->error_str, sizeof(req->error_str), 2258272911Smav "invalid number of threads %s", 2259272911Smav num_thread_str); 2260267481Smav goto bailout_error; 2261229997Sken } 2262267481Smav num_threads = tmp_num_threads; 2263229997Sken } 2264274154Smav unmap = (be_lun->dispatch == ctl_be_block_dispatch_zvol); 2265268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "unmap"); 2266274154Smav if (value != NULL) 2267274154Smav unmap = (strcmp(value, "on") == 0); 2268229997Sken 2269229997Sken be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED; 2270229997Sken be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY; 2271272911Smav if (be_lun->vn == NULL) 2272272911Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_OFFLINE; 2273264274Smav if (unmap) 2274264274Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 2275275568Smav if (be_lun->dispatch != ctl_be_block_dispatch_dev) 2276275568Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_SERSEQ_READ; 2277229997Sken be_lun->ctl_be_lun.be_lun = be_lun; 2278272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2279272911Smav 0 : (be_lun->size_blocks - 1); 2280229997Sken be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2281264191Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2282264191Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2283275865Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2284275865Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2285275920Smav be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock; 2286275920Smav be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen; 2287229997Sken /* Tell the user the blocksize we ended up using */ 2288272911Smav params->lun_size_bytes = be_lun->size_bytes; 2289229997Sken params->blocksize_bytes = be_lun->blocksize; 2290229997Sken if (params->flags & CTL_LUN_FLAG_ID_REQ) { 2291229997Sken be_lun->ctl_be_lun.req_lun_id = params->req_lun_id; 2292229997Sken be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ; 2293229997Sken } else 2294229997Sken be_lun->ctl_be_lun.req_lun_id = 0; 2295229997Sken 2296229997Sken be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown; 2297229997Sken be_lun->ctl_be_lun.lun_config_status = 2298229997Sken ctl_be_block_lun_config_status; 2299229997Sken be_lun->ctl_be_lun.be = &ctl_be_block_driver; 2300229997Sken 2301229997Sken if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 2302229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d", 2303229997Sken softc->num_luns); 2304229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr, 2305275953Smav MIN(sizeof(be_lun->ctl_be_lun.serial_num), 2306229997Sken sizeof(tmpstr))); 2307229997Sken 2308229997Sken /* Tell the user what we used for a serial number */ 2309229997Sken strncpy((char *)params->serial_num, tmpstr, 2310275953Smav MIN(sizeof(params->serial_num), sizeof(tmpstr))); 2311229997Sken } else { 2312229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, 2313229997Sken params->serial_num, 2314275953Smav MIN(sizeof(be_lun->ctl_be_lun.serial_num), 2315229997Sken sizeof(params->serial_num))); 2316229997Sken } 2317229997Sken if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 2318229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns); 2319229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr, 2320275953Smav MIN(sizeof(be_lun->ctl_be_lun.device_id), 2321229997Sken sizeof(tmpstr))); 2322229997Sken 2323229997Sken /* Tell the user what we used for a device ID */ 2324229997Sken strncpy((char *)params->device_id, tmpstr, 2325275953Smav MIN(sizeof(params->device_id), sizeof(tmpstr))); 2326229997Sken } else { 2327229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, 2328229997Sken params->device_id, 2329275953Smav MIN(sizeof(be_lun->ctl_be_lun.device_id), 2330275953Smav sizeof(params->device_id))); 2331229997Sken } 2332229997Sken 2333229997Sken TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun); 2334229997Sken 2335229997Sken be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK, 2336229997Sken taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 2337229997Sken 2338229997Sken if (be_lun->io_taskqueue == NULL) { 2339229997Sken snprintf(req->error_str, sizeof(req->error_str), 2340272911Smav "unable to create taskqueue"); 2341229997Sken goto bailout_error; 2342229997Sken } 2343229997Sken 2344229997Sken /* 2345229997Sken * Note that we start the same number of threads by default for 2346229997Sken * both the file case and the block device case. For the file 2347229997Sken * case, we need multiple threads to allow concurrency, because the 2348229997Sken * vnode interface is designed to be a blocking interface. For the 2349229997Sken * block device case, ZFS zvols at least will block the caller's 2350229997Sken * context in many instances, and so we need multiple threads to 2351229997Sken * overcome that problem. Other block devices don't need as many 2352229997Sken * threads, but they shouldn't cause too many problems. 2353229997Sken * 2354229997Sken * If the user wants to just have a single thread for a block 2355229997Sken * device, he can specify that when the LUN is created, or change 2356229997Sken * the tunable/sysctl to alter the default number of threads. 2357229997Sken */ 2358229997Sken retval = taskqueue_start_threads(&be_lun->io_taskqueue, 2359229997Sken /*num threads*/num_threads, 2360229997Sken /*priority*/PWAIT, 2361229997Sken /*thread name*/ 2362229997Sken "%s taskq", be_lun->lunname); 2363229997Sken 2364229997Sken if (retval != 0) 2365229997Sken goto bailout_error; 2366229997Sken 2367229997Sken be_lun->num_threads = num_threads; 2368229997Sken 2369229997Sken mtx_lock(&softc->lock); 2370229997Sken softc->num_luns++; 2371229997Sken STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links); 2372229997Sken 2373229997Sken mtx_unlock(&softc->lock); 2374229997Sken 2375229997Sken retval = ctl_add_lun(&be_lun->ctl_be_lun); 2376229997Sken if (retval != 0) { 2377229997Sken mtx_lock(&softc->lock); 2378229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2379229997Sken links); 2380229997Sken softc->num_luns--; 2381229997Sken mtx_unlock(&softc->lock); 2382229997Sken snprintf(req->error_str, sizeof(req->error_str), 2383272911Smav "ctl_add_lun() returned error %d, see dmesg for " 2384272911Smav "details", retval); 2385229997Sken retval = 0; 2386229997Sken goto bailout_error; 2387229997Sken } 2388229997Sken 2389229997Sken mtx_lock(&softc->lock); 2390229997Sken 2391229997Sken /* 2392229997Sken * Tell the config_status routine that we're waiting so it won't 2393229997Sken * clean up the LUN in the event of an error. 2394229997Sken */ 2395229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2396229997Sken 2397229997Sken while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) { 2398229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2399229997Sken if (retval == EINTR) 2400229997Sken break; 2401229997Sken } 2402229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2403229997Sken 2404229997Sken if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) { 2405229997Sken snprintf(req->error_str, sizeof(req->error_str), 2406272911Smav "LUN configuration error, see dmesg for details"); 2407229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2408229997Sken links); 2409229997Sken softc->num_luns--; 2410229997Sken mtx_unlock(&softc->lock); 2411229997Sken goto bailout_error; 2412229997Sken } else { 2413229997Sken params->req_lun_id = be_lun->ctl_be_lun.lun_id; 2414229997Sken } 2415229997Sken 2416229997Sken mtx_unlock(&softc->lock); 2417229997Sken 2418229997Sken be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id, 2419229997Sken be_lun->blocksize, 2420229997Sken DEVSTAT_ALL_SUPPORTED, 2421229997Sken be_lun->ctl_be_lun.lun_type 2422229997Sken | DEVSTAT_TYPE_IF_OTHER, 2423229997Sken DEVSTAT_PRIORITY_OTHER); 2424229997Sken 2425229997Sken return (retval); 2426229997Sken 2427229997Skenbailout_error: 2428229997Sken req->status = CTL_LUN_ERROR; 2429229997Sken 2430267429Smav if (be_lun->io_taskqueue != NULL) 2431267429Smav taskqueue_free(be_lun->io_taskqueue); 2432229997Sken ctl_be_block_close(be_lun); 2433267429Smav if (be_lun->dev_path != NULL) 2434267429Smav free(be_lun->dev_path, M_CTLBLK); 2435267429Smav if (be_lun->lun_zone != NULL) 2436267429Smav uma_zdestroy(be_lun->lun_zone); 2437268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2438267877Smav mtx_destroy(&be_lun->queue_lock); 2439267877Smav mtx_destroy(&be_lun->io_lock); 2440229997Sken free(be_lun, M_CTLBLK); 2441229997Sken 2442229997Sken return (retval); 2443229997Sken} 2444229997Sken 2445229997Skenstatic int 2446229997Skenctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2447229997Sken{ 2448229997Sken struct ctl_lun_rm_params *params; 2449229997Sken struct ctl_be_block_lun *be_lun; 2450229997Sken int retval; 2451229997Sken 2452229997Sken params = &req->reqdata.rm; 2453229997Sken 2454229997Sken mtx_lock(&softc->lock); 2455229997Sken 2456229997Sken be_lun = NULL; 2457229997Sken 2458229997Sken STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2459229997Sken if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2460229997Sken break; 2461229997Sken } 2462229997Sken mtx_unlock(&softc->lock); 2463229997Sken 2464229997Sken if (be_lun == NULL) { 2465229997Sken snprintf(req->error_str, sizeof(req->error_str), 2466272911Smav "LUN %u is not managed by the block backend", 2467272911Smav params->lun_id); 2468229997Sken goto bailout_error; 2469229997Sken } 2470229997Sken 2471229997Sken retval = ctl_disable_lun(&be_lun->ctl_be_lun); 2472229997Sken 2473229997Sken if (retval != 0) { 2474229997Sken snprintf(req->error_str, sizeof(req->error_str), 2475272911Smav "error %d returned from ctl_disable_lun() for " 2476272911Smav "LUN %d", retval, params->lun_id); 2477229997Sken goto bailout_error; 2478229997Sken 2479229997Sken } 2480229997Sken 2481229997Sken retval = ctl_invalidate_lun(&be_lun->ctl_be_lun); 2482229997Sken if (retval != 0) { 2483229997Sken snprintf(req->error_str, sizeof(req->error_str), 2484272911Smav "error %d returned from ctl_invalidate_lun() for " 2485272911Smav "LUN %d", retval, params->lun_id); 2486229997Sken goto bailout_error; 2487229997Sken } 2488229997Sken 2489229997Sken mtx_lock(&softc->lock); 2490229997Sken 2491229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2492229997Sken 2493229997Sken while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2494229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2495229997Sken if (retval == EINTR) 2496229997Sken break; 2497229997Sken } 2498229997Sken 2499229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2500229997Sken 2501229997Sken if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2502229997Sken snprintf(req->error_str, sizeof(req->error_str), 2503272911Smav "interrupted waiting for LUN to be freed"); 2504229997Sken mtx_unlock(&softc->lock); 2505229997Sken goto bailout_error; 2506229997Sken } 2507229997Sken 2508229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links); 2509229997Sken 2510229997Sken softc->num_luns--; 2511229997Sken mtx_unlock(&softc->lock); 2512229997Sken 2513229997Sken taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task); 2514229997Sken 2515229997Sken taskqueue_free(be_lun->io_taskqueue); 2516229997Sken 2517229997Sken ctl_be_block_close(be_lun); 2518229997Sken 2519229997Sken if (be_lun->disk_stats != NULL) 2520229997Sken devstat_remove_entry(be_lun->disk_stats); 2521229997Sken 2522229997Sken uma_zdestroy(be_lun->lun_zone); 2523229997Sken 2524268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2525229997Sken free(be_lun->dev_path, M_CTLBLK); 2526267877Smav mtx_destroy(&be_lun->queue_lock); 2527267877Smav mtx_destroy(&be_lun->io_lock); 2528229997Sken free(be_lun, M_CTLBLK); 2529229997Sken 2530229997Sken req->status = CTL_LUN_OK; 2531229997Sken 2532229997Sken return (0); 2533229997Sken 2534229997Skenbailout_error: 2535229997Sken 2536229997Sken req->status = CTL_LUN_ERROR; 2537229997Sken 2538229997Sken return (0); 2539229997Sken} 2540229997Sken 2541232604Straszstatic int 2542232604Straszctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 2543232604Strasz struct ctl_lun_req *req) 2544232604Strasz{ 2545232604Strasz struct vattr vattr; 2546232604Strasz int error; 2547272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2548232604Strasz 2549232604Strasz if (params->lun_size_bytes != 0) { 2550232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2551232604Strasz } else { 2552271794Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 2553232604Strasz error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 2554271794Smav VOP_UNLOCK(be_lun->vn, 0); 2555232604Strasz if (error != 0) { 2556232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2557232604Strasz "error calling VOP_GETATTR() for file %s", 2558232604Strasz be_lun->dev_path); 2559232604Strasz return (error); 2560232604Strasz } 2561232604Strasz 2562232604Strasz be_lun->size_bytes = vattr.va_size; 2563232604Strasz } 2564232604Strasz 2565232604Strasz return (0); 2566232604Strasz} 2567232604Strasz 2568232604Straszstatic int 2569232604Straszctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 2570232604Strasz struct ctl_lun_req *req) 2571232604Strasz{ 2572271794Smav struct ctl_be_block_devdata *dev_data; 2573232604Strasz int error; 2574272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2575232604Strasz uint64_t size_bytes; 2576232604Strasz 2577271794Smav dev_data = &be_lun->backend.dev; 2578271794Smav if (!dev_data->csw->d_ioctl) { 2579232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2580272911Smav "no d_ioctl for device %s!", be_lun->dev_path); 2581232604Strasz return (ENODEV); 2582232604Strasz } 2583232604Strasz 2584271794Smav error = dev_data->csw->d_ioctl(dev_data->cdev, DIOCGMEDIASIZE, 2585232604Strasz (caddr_t)&size_bytes, FREAD, 2586232604Strasz curthread); 2587232604Strasz if (error) { 2588232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2589272911Smav "error %d returned for DIOCGMEDIASIZE ioctl " 2590272911Smav "on %s!", error, be_lun->dev_path); 2591232604Strasz return (error); 2592232604Strasz } 2593232604Strasz 2594232604Strasz if (params->lun_size_bytes != 0) { 2595232604Strasz if (params->lun_size_bytes > size_bytes) { 2596232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2597272911Smav "requested LUN size %ju > backing device " 2598272911Smav "size %ju", 2599232604Strasz (uintmax_t)params->lun_size_bytes, 2600232604Strasz (uintmax_t)size_bytes); 2601232604Strasz return (EINVAL); 2602232604Strasz } 2603232604Strasz 2604232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2605232604Strasz } else { 2606232604Strasz be_lun->size_bytes = size_bytes; 2607232604Strasz } 2608232604Strasz 2609232604Strasz return (0); 2610232604Strasz} 2611232604Strasz 2612232604Straszstatic int 2613232604Straszctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2614232604Strasz{ 2615232604Strasz struct ctl_lun_modify_params *params; 2616232604Strasz struct ctl_be_block_lun *be_lun; 2617271794Smav uint64_t oldsize; 2618241896Skib int error; 2619232604Strasz 2620232604Strasz params = &req->reqdata.modify; 2621232604Strasz 2622232604Strasz mtx_lock(&softc->lock); 2623232604Strasz be_lun = NULL; 2624232604Strasz STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2625232604Strasz if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2626232604Strasz break; 2627232604Strasz } 2628232604Strasz mtx_unlock(&softc->lock); 2629232604Strasz 2630232604Strasz if (be_lun == NULL) { 2631232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2632272911Smav "LUN %u is not managed by the block backend", 2633272911Smav params->lun_id); 2634232604Strasz goto bailout_error; 2635232604Strasz } 2636232604Strasz 2637272911Smav be_lun->params.lun_size_bytes = params->lun_size_bytes; 2638232604Strasz 2639274253Smav oldsize = be_lun->size_bytes; 2640272911Smav if (be_lun->vn == NULL) 2641272911Smav error = ctl_be_block_open(softc, be_lun, req); 2642272911Smav else if (be_lun->vn->v_type == VREG) 2643232604Strasz error = ctl_be_block_modify_file(be_lun, req); 2644232604Strasz else 2645232604Strasz error = ctl_be_block_modify_dev(be_lun, req); 2646232604Strasz 2647274253Smav if (error == 0 && be_lun->size_bytes != oldsize) { 2648271794Smav be_lun->size_blocks = be_lun->size_bytes >> 2649271794Smav be_lun->blocksize_shift; 2650232604Strasz 2651271794Smav /* 2652271794Smav * The maximum LBA is the size - 1. 2653271794Smav * 2654271794Smav * XXX: Note that this field is being updated without locking, 2655271794Smav * which might cause problems on 32-bit architectures. 2656271794Smav */ 2657272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2658272911Smav 0 : (be_lun->size_blocks - 1); 2659272911Smav be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2660272911Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2661272911Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2662275865Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2663275865Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2664275920Smav be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock; 2665275920Smav be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen; 2666271794Smav ctl_lun_capacity_changed(&be_lun->ctl_be_lun); 2667272911Smav if (oldsize == 0 && be_lun->size_blocks != 0) 2668272911Smav ctl_lun_online(&be_lun->ctl_be_lun); 2669271794Smav } 2670232604Strasz 2671232604Strasz /* Tell the user the exact size we ended up using */ 2672232604Strasz params->lun_size_bytes = be_lun->size_bytes; 2673232604Strasz 2674272911Smav req->status = error ? CTL_LUN_WARNING : CTL_LUN_OK; 2675232604Strasz 2676232604Strasz return (0); 2677232604Strasz 2678232604Straszbailout_error: 2679232604Strasz req->status = CTL_LUN_ERROR; 2680232604Strasz 2681232604Strasz return (0); 2682232604Strasz} 2683232604Strasz 2684229997Skenstatic void 2685229997Skenctl_be_block_lun_shutdown(void *be_lun) 2686229997Sken{ 2687229997Sken struct ctl_be_block_lun *lun; 2688229997Sken struct ctl_be_block_softc *softc; 2689229997Sken 2690229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2691229997Sken 2692229997Sken softc = lun->softc; 2693229997Sken 2694229997Sken mtx_lock(&softc->lock); 2695229997Sken lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED; 2696229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2697229997Sken wakeup(lun); 2698229997Sken mtx_unlock(&softc->lock); 2699229997Sken 2700229997Sken} 2701229997Sken 2702229997Skenstatic void 2703229997Skenctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status) 2704229997Sken{ 2705229997Sken struct ctl_be_block_lun *lun; 2706229997Sken struct ctl_be_block_softc *softc; 2707229997Sken 2708229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2709229997Sken softc = lun->softc; 2710229997Sken 2711229997Sken if (status == CTL_LUN_CONFIG_OK) { 2712229997Sken mtx_lock(&softc->lock); 2713229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2714229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2715229997Sken wakeup(lun); 2716229997Sken mtx_unlock(&softc->lock); 2717229997Sken 2718229997Sken /* 2719229997Sken * We successfully added the LUN, attempt to enable it. 2720229997Sken */ 2721229997Sken if (ctl_enable_lun(&lun->ctl_be_lun) != 0) { 2722229997Sken printf("%s: ctl_enable_lun() failed!\n", __func__); 2723229997Sken if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) { 2724229997Sken printf("%s: ctl_invalidate_lun() failed!\n", 2725229997Sken __func__); 2726229997Sken } 2727229997Sken } 2728229997Sken 2729229997Sken return; 2730229997Sken } 2731229997Sken 2732229997Sken 2733229997Sken mtx_lock(&softc->lock); 2734229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2735229997Sken lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR; 2736229997Sken wakeup(lun); 2737229997Sken mtx_unlock(&softc->lock); 2738229997Sken} 2739229997Sken 2740229997Sken 2741229997Skenstatic int 2742229997Skenctl_be_block_config_write(union ctl_io *io) 2743229997Sken{ 2744229997Sken struct ctl_be_block_lun *be_lun; 2745229997Sken struct ctl_be_lun *ctl_be_lun; 2746229997Sken int retval; 2747229997Sken 2748229997Sken retval = 0; 2749229997Sken 2750229997Sken DPRINTF("entered\n"); 2751229997Sken 2752229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2753229997Sken CTL_PRIV_BACKEND_LUN].ptr; 2754229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2755229997Sken 2756229997Sken switch (io->scsiio.cdb[0]) { 2757229997Sken case SYNCHRONIZE_CACHE: 2758229997Sken case SYNCHRONIZE_CACHE_16: 2759264274Smav case WRITE_SAME_10: 2760264274Smav case WRITE_SAME_16: 2761264274Smav case UNMAP: 2762229997Sken /* 2763229997Sken * The upper level CTL code will filter out any CDBs with 2764229997Sken * the immediate bit set and return the proper error. 2765229997Sken * 2766229997Sken * We don't really need to worry about what LBA range the 2767229997Sken * user asked to be synced out. When they issue a sync 2768229997Sken * cache command, we'll sync out the whole thing. 2769229997Sken */ 2770267877Smav mtx_lock(&be_lun->queue_lock); 2771229997Sken STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr, 2772229997Sken links); 2773267877Smav mtx_unlock(&be_lun->queue_lock); 2774229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 2775229997Sken break; 2776229997Sken case START_STOP_UNIT: { 2777229997Sken struct scsi_start_stop_unit *cdb; 2778229997Sken 2779229997Sken cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 2780229997Sken 2781229997Sken if (cdb->how & SSS_START) 2782229997Sken retval = ctl_start_lun(ctl_be_lun); 2783229997Sken else { 2784229997Sken retval = ctl_stop_lun(ctl_be_lun); 2785229997Sken /* 2786229997Sken * XXX KDM Copan-specific offline behavior. 2787229997Sken * Figure out a reasonable way to port this? 2788229997Sken */ 2789229997Sken#ifdef NEEDTOPORT 2790229997Sken if ((retval == 0) 2791229997Sken && (cdb->byte2 & SSS_ONOFFLINE)) 2792229997Sken retval = ctl_lun_offline(ctl_be_lun); 2793229997Sken#endif 2794229997Sken } 2795229997Sken 2796229997Sken /* 2797229997Sken * In general, the above routines should not fail. They 2798229997Sken * just set state for the LUN. So we've got something 2799229997Sken * pretty wrong here if we can't start or stop the LUN. 2800229997Sken */ 2801229997Sken if (retval != 0) { 2802229997Sken ctl_set_internal_failure(&io->scsiio, 2803229997Sken /*sks_valid*/ 1, 2804229997Sken /*retry_count*/ 0xf051); 2805229997Sken retval = CTL_RETVAL_COMPLETE; 2806229997Sken } else { 2807229997Sken ctl_set_success(&io->scsiio); 2808229997Sken } 2809229997Sken ctl_config_write_done(io); 2810229997Sken break; 2811229997Sken } 2812229997Sken default: 2813229997Sken ctl_set_invalid_opcode(&io->scsiio); 2814229997Sken ctl_config_write_done(io); 2815229997Sken retval = CTL_RETVAL_COMPLETE; 2816229997Sken break; 2817229997Sken } 2818229997Sken 2819229997Sken return (retval); 2820229997Sken} 2821229997Sken 2822229997Skenstatic int 2823229997Skenctl_be_block_config_read(union ctl_io *io) 2824229997Sken{ 2825275474Smav struct ctl_be_block_lun *be_lun; 2826275474Smav struct ctl_be_lun *ctl_be_lun; 2827275474Smav int retval = 0; 2828275474Smav 2829275474Smav DPRINTF("entered\n"); 2830275474Smav 2831275474Smav ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2832275474Smav CTL_PRIV_BACKEND_LUN].ptr; 2833275474Smav be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2834275474Smav 2835275474Smav switch (io->scsiio.cdb[0]) { 2836275474Smav case SERVICE_ACTION_IN: 2837275474Smav if (io->scsiio.cdb[1] == SGLS_SERVICE_ACTION) { 2838275474Smav mtx_lock(&be_lun->queue_lock); 2839275474Smav STAILQ_INSERT_TAIL(&be_lun->config_read_queue, 2840275474Smav &io->io_hdr, links); 2841275474Smav mtx_unlock(&be_lun->queue_lock); 2842275474Smav taskqueue_enqueue(be_lun->io_taskqueue, 2843275474Smav &be_lun->io_task); 2844275474Smav retval = CTL_RETVAL_QUEUED; 2845275474Smav break; 2846275474Smav } 2847275474Smav ctl_set_invalid_field(&io->scsiio, 2848275474Smav /*sks_valid*/ 1, 2849275474Smav /*command*/ 1, 2850275474Smav /*field*/ 1, 2851275474Smav /*bit_valid*/ 1, 2852275474Smav /*bit*/ 4); 2853275474Smav ctl_config_read_done(io); 2854275474Smav retval = CTL_RETVAL_COMPLETE; 2855275474Smav break; 2856275474Smav default: 2857275474Smav ctl_set_invalid_opcode(&io->scsiio); 2858275474Smav ctl_config_read_done(io); 2859275474Smav retval = CTL_RETVAL_COMPLETE; 2860275474Smav break; 2861275474Smav } 2862275474Smav 2863275474Smav return (retval); 2864229997Sken} 2865229997Sken 2866229997Skenstatic int 2867229997Skenctl_be_block_lun_info(void *be_lun, struct sbuf *sb) 2868229997Sken{ 2869229997Sken struct ctl_be_block_lun *lun; 2870229997Sken int retval; 2871229997Sken 2872229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2873229997Sken retval = 0; 2874229997Sken 2875268283Smav retval = sbuf_printf(sb, "\t<num_threads>"); 2876229997Sken 2877229997Sken if (retval != 0) 2878229997Sken goto bailout; 2879229997Sken 2880229997Sken retval = sbuf_printf(sb, "%d", lun->num_threads); 2881229997Sken 2882229997Sken if (retval != 0) 2883229997Sken goto bailout; 2884229997Sken 2885268283Smav retval = sbuf_printf(sb, "</num_threads>\n"); 2886229997Sken 2887229997Skenbailout: 2888229997Sken 2889229997Sken return (retval); 2890229997Sken} 2891229997Sken 2892274154Smavstatic uint64_t 2893274154Smavctl_be_block_lun_attr(void *be_lun, const char *attrname) 2894274154Smav{ 2895274154Smav struct ctl_be_block_lun *lun = (struct ctl_be_block_lun *)be_lun; 2896274154Smav 2897274154Smav if (lun->getattr == NULL) 2898274154Smav return (UINT64_MAX); 2899274154Smav return (lun->getattr(lun, attrname)); 2900274154Smav} 2901274154Smav 2902229997Skenint 2903229997Skenctl_be_block_init(void) 2904229997Sken{ 2905229997Sken struct ctl_be_block_softc *softc; 2906229997Sken int retval; 2907229997Sken 2908229997Sken softc = &backend_block_softc; 2909229997Sken retval = 0; 2910229997Sken 2911267877Smav mtx_init(&softc->lock, "ctlblock", NULL, MTX_DEF); 2912264020Strasz beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io), 2913264020Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 2914229997Sken STAILQ_INIT(&softc->disk_list); 2915229997Sken STAILQ_INIT(&softc->lun_list); 2916229997Sken 2917229997Sken return (retval); 2918229997Sken} 2919