ctl_backend_block.c revision 285030
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 285030 2015-07-02 12:53:22Z 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); 524282565Smav } else if (error == ENOSPC || error == EDQUOT) { 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); 741282565Smav if (error == ENOSPC || error == EDQUOT) { 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; 813285030Smav uint64_t val; 814275481Smav int error; 815275481Smav 816285030Smav val = UINT64_MAX; 817275481Smav if (be_lun->vn == NULL) 818285030Smav return (val); 819285030Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 820275481Smav if (strcmp(attrname, "blocksused") == 0) { 821275481Smav error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 822285030Smav if (error == 0) 823285030Smav val = vattr.va_bytes >> be_lun->blocksize_shift; 824275481Smav } 825285030Smav if (strcmp(attrname, "blocksavail") == 0 && 826285030Smav (be_lun->vn->v_iflag & VI_DOOMED) == 0) { 827275481Smav error = VFS_STATFS(be_lun->vn->v_mount, &statfs); 828285030Smav if (error == 0) 829285030Smav val = (statfs.f_bavail * statfs.f_bsize) >> 830285030Smav be_lun->blocksize_shift; 831275481Smav } 832285030Smav VOP_UNLOCK(be_lun->vn, 0); 833285030Smav return (val); 834275481Smav} 835275481Smav 836275474Smavstatic void 837269123Smavctl_be_block_dispatch_zvol(struct ctl_be_block_lun *be_lun, 838269123Smav struct ctl_be_block_io *beio) 839269123Smav{ 840269123Smav struct ctl_be_block_devdata *dev_data; 841269123Smav union ctl_io *io; 842269123Smav struct uio xuio; 843269123Smav struct iovec *xiovec; 844269123Smav int flags; 845269123Smav int error, i; 846269123Smav 847269123Smav DPRINTF("entered\n"); 848269123Smav 849269123Smav dev_data = &be_lun->backend.dev; 850269123Smav io = beio->io; 851271309Smav flags = 0; 852271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 853271309Smav flags |= IO_DIRECT; 854271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 855271309Smav flags |= IO_SYNC; 856269123Smav 857269123Smav bzero(&xuio, sizeof(xuio)); 858269123Smav if (beio->bio_cmd == BIO_READ) { 859269123Smav SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 860269123Smav xuio.uio_rw = UIO_READ; 861269123Smav } else { 862269123Smav SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 863269123Smav xuio.uio_rw = UIO_WRITE; 864269123Smav } 865269123Smav xuio.uio_offset = beio->io_offset; 866269123Smav xuio.uio_resid = beio->io_len; 867269123Smav xuio.uio_segflg = UIO_SYSSPACE; 868269123Smav xuio.uio_iov = beio->xiovecs; 869269123Smav xuio.uio_iovcnt = beio->num_segs; 870269123Smav xuio.uio_td = curthread; 871269123Smav 872269123Smav for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 873269123Smav xiovec->iov_base = beio->sg_segs[i].addr; 874269123Smav xiovec->iov_len = beio->sg_segs[i].len; 875269123Smav } 876269123Smav 877269123Smav binuptime(&beio->ds_t0); 878269123Smav mtx_lock(&be_lun->io_lock); 879269123Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 880269123Smav mtx_unlock(&be_lun->io_lock); 881269123Smav 882269123Smav if (beio->bio_cmd == BIO_READ) { 883271309Smav error = (*dev_data->csw->d_read)(dev_data->cdev, &xuio, flags); 884269123Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 885269123Smav } else { 886271309Smav error = (*dev_data->csw->d_write)(dev_data->cdev, &xuio, flags); 887269123Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 888269123Smav } 889269123Smav 890269123Smav mtx_lock(&be_lun->io_lock); 891269123Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 892269123Smav beio->ds_tag_type, beio->ds_trans_type, 893269123Smav /*now*/ NULL, /*then*/&beio->ds_t0); 894269123Smav mtx_unlock(&be_lun->io_lock); 895269123Smav 896269123Smav /* 897269123Smav * If we got an error, set the sense data to "MEDIUM ERROR" and 898269123Smav * return the I/O to the user. 899269123Smav */ 900269123Smav if (error != 0) { 901282565Smav if (error == ENOSPC || error == EDQUOT) { 902273809Smav ctl_set_space_alloc_fail(&io->scsiio); 903273809Smav } else 904273809Smav ctl_set_medium_error(&io->scsiio); 905269123Smav ctl_complete_beio(beio); 906269123Smav return; 907269123Smav } 908269123Smav 909269123Smav /* 910269123Smav * If this is a write or a verify, we're all done. 911269123Smav * If this is a read, we can now send the data to the user. 912269123Smav */ 913269123Smav if ((beio->bio_cmd == BIO_WRITE) || 914269123Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 915269123Smav ctl_set_success(&io->scsiio); 916269123Smav ctl_complete_beio(beio); 917269123Smav } else { 918275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 919275058Smav beio->beio_cont == NULL) 920275058Smav ctl_set_success(&io->scsiio); 921269123Smav#ifdef CTL_TIME_IO 922269123Smav getbintime(&io->io_hdr.dma_start_bt); 923269123Smav#endif 924269123Smav ctl_datamove(io); 925269123Smav } 926269123Smav} 927269123Smav 928269123Smavstatic void 929275474Smavctl_be_block_gls_zvol(struct ctl_be_block_lun *be_lun, 930275474Smav struct ctl_be_block_io *beio) 931275474Smav{ 932275474Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 933275474Smav union ctl_io *io = beio->io; 934275474Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 935275474Smav struct scsi_get_lba_status_data *data; 936275474Smav off_t roff, off; 937275474Smav int error, status; 938275474Smav 939275474Smav DPRINTF("entered\n"); 940275474Smav 941275474Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 942275474Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKHOLE, 943275474Smav (caddr_t)&off, FREAD, curthread); 944275474Smav if (error == 0 && off > roff) 945275474Smav status = 0; /* mapped up to off */ 946275474Smav else { 947275474Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKDATA, 948275474Smav (caddr_t)&off, FREAD, curthread); 949275474Smav if (error == 0 && off > roff) 950275474Smav status = 1; /* deallocated up to off */ 951275474Smav else { 952275474Smav status = 0; /* unknown up to the end */ 953275474Smav off = be_lun->size_bytes; 954275474Smav } 955275474Smav } 956275474Smav 957275474Smav off >>= be_lun->blocksize_shift; 958275474Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 959275474Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 960275474Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 961275474Smav data->descr[0].length); 962275474Smav data->descr[0].status = status; 963275474Smav 964275474Smav ctl_complete_beio(beio); 965275474Smav} 966275474Smav 967275474Smavstatic void 968229997Skenctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 969229997Sken struct ctl_be_block_io *beio) 970229997Sken{ 971229997Sken struct bio *bio; 972229997Sken union ctl_io *io; 973229997Sken struct ctl_be_block_devdata *dev_data; 974229997Sken 975229997Sken dev_data = &be_lun->backend.dev; 976229997Sken io = beio->io; 977229997Sken 978229997Sken DPRINTF("entered\n"); 979229997Sken 980229997Sken /* This can't fail, it's a blocking allocation. */ 981229997Sken bio = g_alloc_bio(); 982229997Sken 983229997Sken bio->bio_cmd = BIO_FLUSH; 984229997Sken bio->bio_flags |= BIO_ORDERED; 985229997Sken bio->bio_dev = dev_data->cdev; 986229997Sken bio->bio_offset = 0; 987229997Sken bio->bio_data = 0; 988229997Sken bio->bio_done = ctl_be_block_biodone; 989229997Sken bio->bio_caller1 = beio; 990229997Sken bio->bio_pblkno = 0; 991229997Sken 992229997Sken /* 993229997Sken * We don't need to acquire the LUN lock here, because we are only 994229997Sken * sending one bio, and so there is no other context to synchronize 995229997Sken * with. 996229997Sken */ 997229997Sken beio->num_bios_sent = 1; 998229997Sken beio->send_complete = 1; 999229997Sken 1000229997Sken binuptime(&beio->ds_t0); 1001267877Smav mtx_lock(&be_lun->io_lock); 1002229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1003267877Smav mtx_unlock(&be_lun->io_lock); 1004229997Sken 1005229997Sken (*dev_data->csw->d_strategy)(bio); 1006229997Sken} 1007229997Sken 1008229997Skenstatic void 1009264274Smavctl_be_block_unmap_dev_range(struct ctl_be_block_lun *be_lun, 1010264274Smav struct ctl_be_block_io *beio, 1011264274Smav uint64_t off, uint64_t len, int last) 1012264274Smav{ 1013264274Smav struct bio *bio; 1014264274Smav struct ctl_be_block_devdata *dev_data; 1015264296Smav uint64_t maxlen; 1016264274Smav 1017264274Smav dev_data = &be_lun->backend.dev; 1018264296Smav maxlen = LONG_MAX - (LONG_MAX % be_lun->blocksize); 1019264274Smav while (len > 0) { 1020264274Smav bio = g_alloc_bio(); 1021264274Smav bio->bio_cmd = BIO_DELETE; 1022264274Smav bio->bio_dev = dev_data->cdev; 1023264274Smav bio->bio_offset = off; 1024264296Smav bio->bio_length = MIN(len, maxlen); 1025264274Smav bio->bio_data = 0; 1026264274Smav bio->bio_done = ctl_be_block_biodone; 1027264274Smav bio->bio_caller1 = beio; 1028264296Smav bio->bio_pblkno = off / be_lun->blocksize; 1029264274Smav 1030264274Smav off += bio->bio_length; 1031264274Smav len -= bio->bio_length; 1032264274Smav 1033267877Smav mtx_lock(&be_lun->io_lock); 1034264274Smav beio->num_bios_sent++; 1035264274Smav if (last && len == 0) 1036264274Smav beio->send_complete = 1; 1037267877Smav mtx_unlock(&be_lun->io_lock); 1038264274Smav 1039264274Smav (*dev_data->csw->d_strategy)(bio); 1040264274Smav } 1041264274Smav} 1042264274Smav 1043264274Smavstatic void 1044264274Smavctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 1045264274Smav struct ctl_be_block_io *beio) 1046264274Smav{ 1047264274Smav union ctl_io *io; 1048264274Smav struct ctl_be_block_devdata *dev_data; 1049267515Smav struct ctl_ptr_len_flags *ptrlen; 1050264274Smav struct scsi_unmap_desc *buf, *end; 1051264274Smav uint64_t len; 1052264274Smav 1053264274Smav dev_data = &be_lun->backend.dev; 1054264274Smav io = beio->io; 1055264274Smav 1056264274Smav DPRINTF("entered\n"); 1057264274Smav 1058264274Smav binuptime(&beio->ds_t0); 1059267877Smav mtx_lock(&be_lun->io_lock); 1060264274Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1061267877Smav mtx_unlock(&be_lun->io_lock); 1062264274Smav 1063264274Smav if (beio->io_offset == -1) { 1064264274Smav beio->io_len = 0; 1065267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1066267515Smav buf = (struct scsi_unmap_desc *)ptrlen->ptr; 1067267515Smav end = buf + ptrlen->len / sizeof(*buf); 1068264274Smav for (; buf < end; buf++) { 1069264274Smav len = (uint64_t)scsi_4btoul(buf->length) * 1070264274Smav be_lun->blocksize; 1071264274Smav beio->io_len += len; 1072264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1073264274Smav scsi_8btou64(buf->lba) * be_lun->blocksize, len, 1074264283Smav (end - buf < 2) ? TRUE : FALSE); 1075264274Smav } 1076264274Smav } else 1077264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1078264274Smav beio->io_offset, beio->io_len, TRUE); 1079264274Smav} 1080264274Smav 1081264274Smavstatic void 1082229997Skenctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 1083229997Sken struct ctl_be_block_io *beio) 1084229997Sken{ 1085267877Smav TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 1086229997Sken int i; 1087229997Sken struct bio *bio; 1088229997Sken struct ctl_be_block_devdata *dev_data; 1089229997Sken off_t cur_offset; 1090229997Sken int max_iosize; 1091229997Sken 1092229997Sken DPRINTF("entered\n"); 1093229997Sken 1094229997Sken dev_data = &be_lun->backend.dev; 1095229997Sken 1096229997Sken /* 1097229997Sken * We have to limit our I/O size to the maximum supported by the 1098229997Sken * backend device. Hopefully it is MAXPHYS. If the driver doesn't 1099229997Sken * set it properly, use DFLTPHYS. 1100229997Sken */ 1101229997Sken max_iosize = dev_data->cdev->si_iosize_max; 1102229997Sken if (max_iosize < PAGE_SIZE) 1103229997Sken max_iosize = DFLTPHYS; 1104229997Sken 1105229997Sken cur_offset = beio->io_offset; 1106229997Sken for (i = 0; i < beio->num_segs; i++) { 1107229997Sken size_t cur_size; 1108229997Sken uint8_t *cur_ptr; 1109229997Sken 1110229997Sken cur_size = beio->sg_segs[i].len; 1111229997Sken cur_ptr = beio->sg_segs[i].addr; 1112229997Sken 1113229997Sken while (cur_size > 0) { 1114229997Sken /* This can't fail, it's a blocking allocation. */ 1115229997Sken bio = g_alloc_bio(); 1116229997Sken 1117229997Sken KASSERT(bio != NULL, ("g_alloc_bio() failed!\n")); 1118229997Sken 1119229997Sken bio->bio_cmd = beio->bio_cmd; 1120229997Sken bio->bio_dev = dev_data->cdev; 1121229997Sken bio->bio_caller1 = beio; 1122229997Sken bio->bio_length = min(cur_size, max_iosize); 1123229997Sken bio->bio_offset = cur_offset; 1124229997Sken bio->bio_data = cur_ptr; 1125229997Sken bio->bio_done = ctl_be_block_biodone; 1126229997Sken bio->bio_pblkno = cur_offset / be_lun->blocksize; 1127229997Sken 1128229997Sken cur_offset += bio->bio_length; 1129229997Sken cur_ptr += bio->bio_length; 1130229997Sken cur_size -= bio->bio_length; 1131229997Sken 1132267877Smav TAILQ_INSERT_TAIL(&queue, bio, bio_queue); 1133229997Sken beio->num_bios_sent++; 1134229997Sken } 1135229997Sken } 1136267877Smav binuptime(&beio->ds_t0); 1137267877Smav mtx_lock(&be_lun->io_lock); 1138267877Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1139267877Smav beio->send_complete = 1; 1140267877Smav mtx_unlock(&be_lun->io_lock); 1141267877Smav 1142267877Smav /* 1143267877Smav * Fire off all allocated requests! 1144267877Smav */ 1145267877Smav while ((bio = TAILQ_FIRST(&queue)) != NULL) { 1146267877Smav TAILQ_REMOVE(&queue, bio, bio_queue); 1147267877Smav (*dev_data->csw->d_strategy)(bio); 1148267877Smav } 1149229997Sken} 1150229997Sken 1151274154Smavstatic uint64_t 1152274154Smavctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, const char *attrname) 1153274154Smav{ 1154274154Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 1155274154Smav struct diocgattr_arg arg; 1156274154Smav int error; 1157274154Smav 1158274154Smav if (dev_data->csw == NULL || dev_data->csw->d_ioctl == NULL) 1159274154Smav return (UINT64_MAX); 1160274154Smav strlcpy(arg.name, attrname, sizeof(arg.name)); 1161274154Smav arg.len = sizeof(arg.value.off); 1162274154Smav error = dev_data->csw->d_ioctl(dev_data->cdev, 1163274154Smav DIOCGATTR, (caddr_t)&arg, FREAD, curthread); 1164274154Smav if (error != 0) 1165274154Smav return (UINT64_MAX); 1166274154Smav return (arg.value.off); 1167274154Smav} 1168274154Smav 1169229997Skenstatic void 1170264274Smavctl_be_block_cw_done_ws(struct ctl_be_block_io *beio) 1171264274Smav{ 1172264274Smav union ctl_io *io; 1173264274Smav 1174264274Smav io = beio->io; 1175264274Smav ctl_free_beio(beio); 1176267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1177267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1178267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1179264274Smav ctl_config_write_done(io); 1180264274Smav return; 1181264274Smav } 1182264274Smav 1183264274Smav ctl_be_block_config_write(io); 1184264274Smav} 1185264274Smav 1186264274Smavstatic void 1187264274Smavctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun, 1188264274Smav union ctl_io *io) 1189264274Smav{ 1190264274Smav struct ctl_be_block_io *beio; 1191264274Smav struct ctl_be_block_softc *softc; 1192267515Smav struct ctl_lba_len_flags *lbalen; 1193278625Smav uint64_t len_left, lba; 1194278625Smav uint32_t pb, pbo, adj; 1195264274Smav int i, seglen; 1196264274Smav uint8_t *buf, *end; 1197264274Smav 1198264274Smav DPRINTF("entered\n"); 1199264274Smav 1200267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1201264274Smav softc = be_lun->softc; 1202267537Smav lbalen = ARGS(beio->io); 1203264274Smav 1204271839Smav if (lbalen->flags & ~(SWS_LBDATA | SWS_UNMAP | SWS_ANCHOR | SWS_NDOB) || 1205269622Smav (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR) && be_lun->unmap == NULL)) { 1206264274Smav ctl_free_beio(beio); 1207264274Smav ctl_set_invalid_field(&io->scsiio, 1208264274Smav /*sks_valid*/ 1, 1209264274Smav /*command*/ 1, 1210264274Smav /*field*/ 1, 1211264274Smav /*bit_valid*/ 0, 1212264274Smav /*bit*/ 0); 1213264274Smav ctl_config_write_done(io); 1214264274Smav return; 1215264274Smav } 1216264274Smav 1217264274Smav switch (io->scsiio.tag_type) { 1218264274Smav case CTL_TAG_ORDERED: 1219264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1220264274Smav break; 1221264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1222264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1223264274Smav break; 1224264274Smav case CTL_TAG_UNTAGGED: 1225264274Smav case CTL_TAG_SIMPLE: 1226264274Smav case CTL_TAG_ACA: 1227264274Smav default: 1228264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1229264274Smav break; 1230264274Smav } 1231264274Smav 1232269622Smav if (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR)) { 1233267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1234267515Smav beio->io_len = (uint64_t)lbalen->len * be_lun->blocksize; 1235264274Smav beio->bio_cmd = BIO_DELETE; 1236264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1237264274Smav 1238264274Smav be_lun->unmap(be_lun, beio); 1239264274Smav return; 1240264274Smav } 1241264274Smav 1242264274Smav beio->bio_cmd = BIO_WRITE; 1243264274Smav beio->ds_trans_type = DEVSTAT_WRITE; 1244264274Smav 1245264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1246267515Smav (uintmax_t)lbalen->lba, lbalen->len); 1247264274Smav 1248278625Smav pb = be_lun->blocksize << be_lun->pblockexp; 1249278625Smav if (be_lun->pblockoff > 0) 1250278625Smav pbo = pb - be_lun->blocksize * be_lun->pblockoff; 1251278625Smav else 1252278625Smav pbo = 0; 1253267515Smav len_left = (uint64_t)lbalen->len * be_lun->blocksize; 1254264274Smav for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) { 1255264274Smav 1256264274Smav /* 1257264274Smav * Setup the S/G entry for this chunk. 1258264274Smav */ 1259264886Smav seglen = MIN(CTLBLK_MAX_SEG, len_left); 1260278619Smav if (pb > be_lun->blocksize) { 1261278619Smav adj = ((lbalen->lba + lba) * be_lun->blocksize + 1262278619Smav seglen - pbo) % pb; 1263278619Smav if (seglen > adj) 1264278619Smav seglen -= adj; 1265278619Smav else 1266278619Smav seglen -= seglen % be_lun->blocksize; 1267278619Smav } else 1268278619Smav seglen -= seglen % be_lun->blocksize; 1269264274Smav beio->sg_segs[i].len = seglen; 1270264274Smav beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1271264274Smav 1272264274Smav DPRINTF("segment %d addr %p len %zd\n", i, 1273264274Smav beio->sg_segs[i].addr, beio->sg_segs[i].len); 1274264274Smav 1275264274Smav beio->num_segs++; 1276264274Smav len_left -= seglen; 1277264274Smav 1278264274Smav buf = beio->sg_segs[i].addr; 1279264274Smav end = buf + seglen; 1280264274Smav for (; buf < end; buf += be_lun->blocksize) { 1281264274Smav memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize); 1282267515Smav if (lbalen->flags & SWS_LBDATA) 1283267515Smav scsi_ulto4b(lbalen->lba + lba, buf); 1284264274Smav lba++; 1285264274Smav } 1286264274Smav } 1287264274Smav 1288267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1289264274Smav beio->io_len = lba * be_lun->blocksize; 1290264274Smav 1291264274Smav /* We can not do all in one run. Correct and schedule rerun. */ 1292264274Smav if (len_left > 0) { 1293267515Smav lbalen->lba += lba; 1294267515Smav lbalen->len -= lba; 1295264274Smav beio->beio_cont = ctl_be_block_cw_done_ws; 1296264274Smav } 1297264274Smav 1298264274Smav be_lun->dispatch(be_lun, beio); 1299264274Smav} 1300264274Smav 1301264274Smavstatic void 1302264274Smavctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun, 1303264274Smav union ctl_io *io) 1304264274Smav{ 1305264274Smav struct ctl_be_block_io *beio; 1306264274Smav struct ctl_be_block_softc *softc; 1307267515Smav struct ctl_ptr_len_flags *ptrlen; 1308264274Smav 1309264274Smav DPRINTF("entered\n"); 1310264274Smav 1311267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1312264274Smav softc = be_lun->softc; 1313267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1314264274Smav 1315269622Smav if ((ptrlen->flags & ~SU_ANCHOR) != 0 || be_lun->unmap == NULL) { 1316264274Smav ctl_free_beio(beio); 1317264274Smav ctl_set_invalid_field(&io->scsiio, 1318264274Smav /*sks_valid*/ 0, 1319264274Smav /*command*/ 1, 1320264274Smav /*field*/ 0, 1321264274Smav /*bit_valid*/ 0, 1322264274Smav /*bit*/ 0); 1323264274Smav ctl_config_write_done(io); 1324264274Smav return; 1325264274Smav } 1326264274Smav 1327264274Smav switch (io->scsiio.tag_type) { 1328264274Smav case CTL_TAG_ORDERED: 1329264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1330264274Smav break; 1331264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1332264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1333264274Smav break; 1334264274Smav case CTL_TAG_UNTAGGED: 1335264274Smav case CTL_TAG_SIMPLE: 1336264274Smav case CTL_TAG_ACA: 1337264274Smav default: 1338264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1339264274Smav break; 1340264274Smav } 1341264274Smav 1342264274Smav beio->io_len = 0; 1343264274Smav beio->io_offset = -1; 1344264274Smav 1345264274Smav beio->bio_cmd = BIO_DELETE; 1346264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1347264274Smav 1348267515Smav DPRINTF("UNMAP\n"); 1349264274Smav 1350264274Smav be_lun->unmap(be_lun, beio); 1351264274Smav} 1352264274Smav 1353264274Smavstatic void 1354275474Smavctl_be_block_cr_done(struct ctl_be_block_io *beio) 1355275474Smav{ 1356275474Smav union ctl_io *io; 1357275474Smav 1358275474Smav io = beio->io; 1359275474Smav ctl_free_beio(beio); 1360275474Smav ctl_config_read_done(io); 1361275474Smav} 1362275474Smav 1363275474Smavstatic void 1364275474Smavctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 1365275474Smav union ctl_io *io) 1366275474Smav{ 1367275474Smav struct ctl_be_block_io *beio; 1368275474Smav struct ctl_be_block_softc *softc; 1369275474Smav 1370275474Smav DPRINTF("entered\n"); 1371275474Smav 1372275474Smav softc = be_lun->softc; 1373275474Smav beio = ctl_alloc_beio(softc); 1374275474Smav beio->io = io; 1375275474Smav beio->lun = be_lun; 1376275474Smav beio->beio_cont = ctl_be_block_cr_done; 1377275474Smav PRIV(io)->ptr = (void *)beio; 1378275474Smav 1379275474Smav switch (io->scsiio.cdb[0]) { 1380275474Smav case SERVICE_ACTION_IN: /* GET LBA STATUS */ 1381275474Smav beio->bio_cmd = -1; 1382275474Smav beio->ds_trans_type = DEVSTAT_NO_DATA; 1383275474Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1384275474Smav beio->io_len = 0; 1385275474Smav if (be_lun->get_lba_status) 1386275474Smav be_lun->get_lba_status(be_lun, beio); 1387275474Smav else 1388275474Smav ctl_be_block_cr_done(beio); 1389275474Smav break; 1390275474Smav default: 1391275474Smav panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1392275474Smav break; 1393275474Smav } 1394275474Smav} 1395275474Smav 1396275474Smavstatic void 1397264274Smavctl_be_block_cw_done(struct ctl_be_block_io *beio) 1398264274Smav{ 1399264274Smav union ctl_io *io; 1400264274Smav 1401264274Smav io = beio->io; 1402264274Smav ctl_free_beio(beio); 1403264274Smav ctl_config_write_done(io); 1404264274Smav} 1405264274Smav 1406264274Smavstatic void 1407229997Skenctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 1408229997Sken union ctl_io *io) 1409229997Sken{ 1410229997Sken struct ctl_be_block_io *beio; 1411229997Sken struct ctl_be_block_softc *softc; 1412229997Sken 1413229997Sken DPRINTF("entered\n"); 1414229997Sken 1415229997Sken softc = be_lun->softc; 1416229997Sken beio = ctl_alloc_beio(softc); 1417229997Sken beio->io = io; 1418229997Sken beio->lun = be_lun; 1419264274Smav beio->beio_cont = ctl_be_block_cw_done; 1420267519Smav PRIV(io)->ptr = (void *)beio; 1421229997Sken 1422229997Sken switch (io->scsiio.cdb[0]) { 1423229997Sken case SYNCHRONIZE_CACHE: 1424229997Sken case SYNCHRONIZE_CACHE_16: 1425249194Strasz beio->bio_cmd = BIO_FLUSH; 1426229997Sken beio->ds_trans_type = DEVSTAT_NO_DATA; 1427229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1428229997Sken beio->io_len = 0; 1429229997Sken be_lun->lun_flush(be_lun, beio); 1430229997Sken break; 1431264274Smav case WRITE_SAME_10: 1432264274Smav case WRITE_SAME_16: 1433264274Smav ctl_be_block_cw_dispatch_ws(be_lun, io); 1434264274Smav break; 1435264274Smav case UNMAP: 1436264274Smav ctl_be_block_cw_dispatch_unmap(be_lun, io); 1437264274Smav break; 1438229997Sken default: 1439229997Sken panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1440229997Sken break; 1441229997Sken } 1442229997Sken} 1443229997Sken 1444258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t"); 1445258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t"); 1446258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t"); 1447258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t"); 1448229997Sken 1449229997Skenstatic void 1450264886Smavctl_be_block_next(struct ctl_be_block_io *beio) 1451264886Smav{ 1452264886Smav struct ctl_be_block_lun *be_lun; 1453264886Smav union ctl_io *io; 1454264886Smav 1455264886Smav io = beio->io; 1456264886Smav be_lun = beio->lun; 1457264886Smav ctl_free_beio(beio); 1458267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1459267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1460267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1461267537Smav ctl_data_submit_done(io); 1462264886Smav return; 1463264886Smav } 1464264886Smav 1465264886Smav io->io_hdr.status &= ~CTL_STATUS_MASK; 1466264886Smav io->io_hdr.status |= CTL_STATUS_NONE; 1467264886Smav 1468267877Smav mtx_lock(&be_lun->queue_lock); 1469264886Smav /* 1470264886Smav * XXX KDM make sure that links is okay to use at this point. 1471264886Smav * Otherwise, we either need to add another field to ctl_io_hdr, 1472264886Smav * or deal with resource allocation here. 1473264886Smav */ 1474264886Smav STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1475267877Smav mtx_unlock(&be_lun->queue_lock); 1476264886Smav 1477264886Smav taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1478264886Smav} 1479264886Smav 1480264886Smavstatic void 1481229997Skenctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 1482229997Sken union ctl_io *io) 1483229997Sken{ 1484229997Sken struct ctl_be_block_io *beio; 1485229997Sken struct ctl_be_block_softc *softc; 1486267537Smav struct ctl_lba_len_flags *lbalen; 1487267519Smav struct ctl_ptr_len_flags *bptrlen; 1488267519Smav uint64_t len_left, lbas; 1489229997Sken int i; 1490229997Sken 1491229997Sken softc = be_lun->softc; 1492229997Sken 1493229997Sken DPRINTF("entered\n"); 1494229997Sken 1495267537Smav lbalen = ARGS(io); 1496267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1497267537Smav SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0); 1498267537Smav } else { 1499229997Sken SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0); 1500229997Sken } 1501229997Sken 1502229997Sken beio = ctl_alloc_beio(softc); 1503229997Sken beio->io = io; 1504229997Sken beio->lun = be_lun; 1505267519Smav bptrlen = PRIV(io); 1506267519Smav bptrlen->ptr = (void *)beio; 1507229997Sken 1508229997Sken switch (io->scsiio.tag_type) { 1509229997Sken case CTL_TAG_ORDERED: 1510229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1511229997Sken break; 1512229997Sken case CTL_TAG_HEAD_OF_QUEUE: 1513229997Sken beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1514229997Sken break; 1515229997Sken case CTL_TAG_UNTAGGED: 1516229997Sken case CTL_TAG_SIMPLE: 1517229997Sken case CTL_TAG_ACA: 1518229997Sken default: 1519229997Sken beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1520229997Sken break; 1521229997Sken } 1522229997Sken 1523267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1524267537Smav beio->bio_cmd = BIO_WRITE; 1525267537Smav beio->ds_trans_type = DEVSTAT_WRITE; 1526267537Smav } else { 1527229997Sken beio->bio_cmd = BIO_READ; 1528229997Sken beio->ds_trans_type = DEVSTAT_READ; 1529229997Sken } 1530229997Sken 1531264886Smav DPRINTF("%s at LBA %jx len %u @%ju\n", 1532229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", 1533267519Smav (uintmax_t)lbalen->lba, lbalen->len, bptrlen->len); 1534267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1535267537Smav lbas = CTLBLK_HALF_IO_SIZE; 1536267537Smav else 1537267537Smav lbas = CTLBLK_MAX_IO_SIZE; 1538267537Smav lbas = MIN(lbalen->len - bptrlen->len, lbas / be_lun->blocksize); 1539267519Smav beio->io_offset = (lbalen->lba + bptrlen->len) * be_lun->blocksize; 1540267519Smav beio->io_len = lbas * be_lun->blocksize; 1541267519Smav bptrlen->len += lbas; 1542229997Sken 1543264886Smav for (i = 0, len_left = beio->io_len; len_left > 0; i++) { 1544264886Smav KASSERT(i < CTLBLK_MAX_SEGS, ("Too many segs (%d >= %d)", 1545264886Smav i, CTLBLK_MAX_SEGS)); 1546229997Sken 1547229997Sken /* 1548229997Sken * Setup the S/G entry for this chunk. 1549229997Sken */ 1550264886Smav beio->sg_segs[i].len = min(CTLBLK_MAX_SEG, len_left); 1551229997Sken beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1552229997Sken 1553229997Sken DPRINTF("segment %d addr %p len %zd\n", i, 1554229997Sken beio->sg_segs[i].addr, beio->sg_segs[i].len); 1555229997Sken 1556267537Smav /* Set up second segment for compare operation. */ 1557267537Smav if (lbalen->flags & CTL_LLF_COMPARE) { 1558267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].len = 1559267537Smav beio->sg_segs[i].len; 1560267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = 1561267537Smav uma_zalloc(be_lun->lun_zone, M_WAITOK); 1562267537Smav } 1563267537Smav 1564229997Sken beio->num_segs++; 1565229997Sken len_left -= beio->sg_segs[i].len; 1566229997Sken } 1567267519Smav if (bptrlen->len < lbalen->len) 1568264886Smav beio->beio_cont = ctl_be_block_next; 1569264886Smav io->scsiio.be_move_done = ctl_be_block_move_done; 1570267537Smav /* For compare we have separate S/G lists for read and datamove. */ 1571267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1572267537Smav io->scsiio.kern_data_ptr = (uint8_t *)&beio->sg_segs[CTLBLK_HALF_SEGS]; 1573267537Smav else 1574267537Smav io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 1575264886Smav io->scsiio.kern_data_len = beio->io_len; 1576264886Smav io->scsiio.kern_data_resid = 0; 1577264886Smav io->scsiio.kern_sg_entries = beio->num_segs; 1578264886Smav io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 1579229997Sken 1580229997Sken /* 1581229997Sken * For the read case, we need to read the data into our buffers and 1582229997Sken * then we can send it back to the user. For the write case, we 1583229997Sken * need to get the data from the user first. 1584229997Sken */ 1585229997Sken if (beio->bio_cmd == BIO_READ) { 1586229997Sken SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0); 1587229997Sken be_lun->dispatch(be_lun, beio); 1588229997Sken } else { 1589229997Sken SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0); 1590229997Sken#ifdef CTL_TIME_IO 1591229997Sken getbintime(&io->io_hdr.dma_start_bt); 1592229997Sken#endif 1593229997Sken ctl_datamove(io); 1594229997Sken } 1595229997Sken} 1596229997Sken 1597229997Skenstatic void 1598229997Skenctl_be_block_worker(void *context, int pending) 1599229997Sken{ 1600229997Sken struct ctl_be_block_lun *be_lun; 1601229997Sken struct ctl_be_block_softc *softc; 1602229997Sken union ctl_io *io; 1603229997Sken 1604229997Sken be_lun = (struct ctl_be_block_lun *)context; 1605229997Sken softc = be_lun->softc; 1606229997Sken 1607229997Sken DPRINTF("entered\n"); 1608229997Sken 1609267877Smav mtx_lock(&be_lun->queue_lock); 1610229997Sken for (;;) { 1611229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue); 1612229997Sken if (io != NULL) { 1613229997Sken struct ctl_be_block_io *beio; 1614229997Sken 1615229997Sken DPRINTF("datamove queue\n"); 1616229997Sken 1617229997Sken STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr, 1618229997Sken ctl_io_hdr, links); 1619229997Sken 1620267877Smav mtx_unlock(&be_lun->queue_lock); 1621229997Sken 1622267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1623229997Sken 1624229997Sken be_lun->dispatch(be_lun, beio); 1625229997Sken 1626267877Smav mtx_lock(&be_lun->queue_lock); 1627229997Sken continue; 1628229997Sken } 1629229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue); 1630229997Sken if (io != NULL) { 1631229997Sken DPRINTF("config write queue\n"); 1632229997Sken STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr, 1633229997Sken ctl_io_hdr, links); 1634267877Smav mtx_unlock(&be_lun->queue_lock); 1635229997Sken ctl_be_block_cw_dispatch(be_lun, io); 1636267877Smav mtx_lock(&be_lun->queue_lock); 1637229997Sken continue; 1638229997Sken } 1639275474Smav io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_read_queue); 1640275474Smav if (io != NULL) { 1641275474Smav DPRINTF("config read queue\n"); 1642275474Smav STAILQ_REMOVE(&be_lun->config_read_queue, &io->io_hdr, 1643275474Smav ctl_io_hdr, links); 1644275474Smav mtx_unlock(&be_lun->queue_lock); 1645275474Smav ctl_be_block_cr_dispatch(be_lun, io); 1646275474Smav mtx_lock(&be_lun->queue_lock); 1647275474Smav continue; 1648275474Smav } 1649229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue); 1650229997Sken if (io != NULL) { 1651229997Sken DPRINTF("input queue\n"); 1652229997Sken 1653229997Sken STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr, 1654229997Sken ctl_io_hdr, links); 1655267877Smav mtx_unlock(&be_lun->queue_lock); 1656229997Sken 1657229997Sken /* 1658229997Sken * We must drop the lock, since this routine and 1659229997Sken * its children may sleep. 1660229997Sken */ 1661229997Sken ctl_be_block_dispatch(be_lun, io); 1662229997Sken 1663267877Smav mtx_lock(&be_lun->queue_lock); 1664229997Sken continue; 1665229997Sken } 1666229997Sken 1667229997Sken /* 1668229997Sken * If we get here, there is no work left in the queues, so 1669229997Sken * just break out and let the task queue go to sleep. 1670229997Sken */ 1671229997Sken break; 1672229997Sken } 1673267877Smav mtx_unlock(&be_lun->queue_lock); 1674229997Sken} 1675229997Sken 1676229997Sken/* 1677229997Sken * Entry point from CTL to the backend for I/O. We queue everything to a 1678229997Sken * work thread, so this just puts the I/O on a queue and wakes up the 1679229997Sken * thread. 1680229997Sken */ 1681229997Skenstatic int 1682229997Skenctl_be_block_submit(union ctl_io *io) 1683229997Sken{ 1684229997Sken struct ctl_be_block_lun *be_lun; 1685229997Sken struct ctl_be_lun *ctl_be_lun; 1686229997Sken 1687229997Sken DPRINTF("entered\n"); 1688229997Sken 1689229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 1690229997Sken CTL_PRIV_BACKEND_LUN].ptr; 1691229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 1692229997Sken 1693229997Sken /* 1694229997Sken * Make sure we only get SCSI I/O. 1695229997Sken */ 1696229997Sken KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type " 1697229997Sken "%#x) encountered", io->io_hdr.io_type)); 1698229997Sken 1699267519Smav PRIV(io)->len = 0; 1700267519Smav 1701267877Smav mtx_lock(&be_lun->queue_lock); 1702229997Sken /* 1703229997Sken * XXX KDM make sure that links is okay to use at this point. 1704229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 1705229997Sken * or deal with resource allocation here. 1706229997Sken */ 1707229997Sken STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1708267877Smav mtx_unlock(&be_lun->queue_lock); 1709229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1710229997Sken 1711267514Smav return (CTL_RETVAL_COMPLETE); 1712229997Sken} 1713229997Sken 1714229997Skenstatic int 1715229997Skenctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 1716229997Sken int flag, struct thread *td) 1717229997Sken{ 1718229997Sken struct ctl_be_block_softc *softc; 1719229997Sken int error; 1720229997Sken 1721229997Sken softc = &backend_block_softc; 1722229997Sken 1723229997Sken error = 0; 1724229997Sken 1725229997Sken switch (cmd) { 1726229997Sken case CTL_LUN_REQ: { 1727229997Sken struct ctl_lun_req *lun_req; 1728229997Sken 1729229997Sken lun_req = (struct ctl_lun_req *)addr; 1730229997Sken 1731229997Sken switch (lun_req->reqtype) { 1732229997Sken case CTL_LUNREQ_CREATE: 1733229997Sken error = ctl_be_block_create(softc, lun_req); 1734229997Sken break; 1735229997Sken case CTL_LUNREQ_RM: 1736229997Sken error = ctl_be_block_rm(softc, lun_req); 1737229997Sken break; 1738232604Strasz case CTL_LUNREQ_MODIFY: 1739232604Strasz error = ctl_be_block_modify(softc, lun_req); 1740232604Strasz break; 1741229997Sken default: 1742229997Sken lun_req->status = CTL_LUN_ERROR; 1743229997Sken snprintf(lun_req->error_str, sizeof(lun_req->error_str), 1744272911Smav "invalid LUN request type %d", 1745229997Sken lun_req->reqtype); 1746229997Sken break; 1747229997Sken } 1748229997Sken break; 1749229997Sken } 1750229997Sken default: 1751229997Sken error = ENOTTY; 1752229997Sken break; 1753229997Sken } 1754229997Sken 1755229997Sken return (error); 1756229997Sken} 1757229997Sken 1758229997Skenstatic int 1759229997Skenctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1760229997Sken{ 1761229997Sken struct ctl_be_block_filedata *file_data; 1762229997Sken struct ctl_lun_create_params *params; 1763275865Smav char *value; 1764229997Sken struct vattr vattr; 1765275865Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1766229997Sken int error; 1767229997Sken 1768229997Sken error = 0; 1769229997Sken file_data = &be_lun->backend.file; 1770272911Smav params = &be_lun->params; 1771229997Sken 1772229997Sken be_lun->dev_type = CTL_BE_BLOCK_FILE; 1773229997Sken be_lun->dispatch = ctl_be_block_dispatch_file; 1774229997Sken be_lun->lun_flush = ctl_be_block_flush_file; 1775275474Smav be_lun->get_lba_status = ctl_be_block_gls_file; 1776275481Smav be_lun->getattr = ctl_be_block_getattr_file; 1777229997Sken 1778229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 1779229997Sken if (error != 0) { 1780229997Sken snprintf(req->error_str, sizeof(req->error_str), 1781229997Sken "error calling VOP_GETATTR() for file %s", 1782229997Sken be_lun->dev_path); 1783229997Sken return (error); 1784229997Sken } 1785229997Sken 1786229997Sken /* 1787229997Sken * Verify that we have the ability to upgrade to exclusive 1788229997Sken * access on this file so we can trap errors at open instead 1789229997Sken * of reporting them during first access. 1790229997Sken */ 1791229997Sken if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) { 1792229997Sken vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY); 1793229997Sken if (be_lun->vn->v_iflag & VI_DOOMED) { 1794229997Sken error = EBADF; 1795229997Sken snprintf(req->error_str, sizeof(req->error_str), 1796229997Sken "error locking file %s", be_lun->dev_path); 1797229997Sken return (error); 1798229997Sken } 1799229997Sken } 1800229997Sken 1801229997Sken 1802229997Sken file_data->cred = crhold(curthread->td_ucred); 1803232604Strasz if (params->lun_size_bytes != 0) 1804232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1805232604Strasz else 1806232604Strasz be_lun->size_bytes = vattr.va_size; 1807229997Sken /* 1808229997Sken * We set the multi thread flag for file operations because all 1809229997Sken * filesystems (in theory) are capable of allowing multiple readers 1810229997Sken * of a file at once. So we want to get the maximum possible 1811229997Sken * concurrency. 1812229997Sken */ 1813229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD; 1814229997Sken 1815229997Sken /* 1816273029Smav * For files we can use any logical block size. Prefer 512 bytes 1817273029Smav * for compatibility reasons. If file's vattr.va_blocksize 1818273029Smav * (preferred I/O block size) is bigger and multiple to chosen 1819273029Smav * logical block size -- report it as physical block size. 1820229997Sken */ 1821229997Sken if (params->blocksize_bytes != 0) 1822229997Sken be_lun->blocksize = params->blocksize_bytes; 1823229997Sken else 1824229997Sken be_lun->blocksize = 512; 1825275865Smav 1826275865Smav us = ps = vattr.va_blocksize; 1827275865Smav uo = po = 0; 1828275865Smav 1829275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1830275865Smav if (value != NULL) 1831275865Smav ctl_expand_number(value, &ps); 1832275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1833275865Smav if (value != NULL) 1834275865Smav ctl_expand_number(value, &po); 1835275865Smav pss = ps / be_lun->blocksize; 1836275865Smav pos = po / be_lun->blocksize; 1837275865Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1838275865Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1839273029Smav be_lun->pblockexp = fls(pss) - 1; 1840275865Smav be_lun->pblockoff = (pss - pos) % pss; 1841273029Smav } 1842229997Sken 1843275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 1844275865Smav if (value != NULL) 1845275865Smav ctl_expand_number(value, &us); 1846275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 1847275865Smav if (value != NULL) 1848275865Smav ctl_expand_number(value, &uo); 1849275865Smav uss = us / be_lun->blocksize; 1850275865Smav uos = uo / be_lun->blocksize; 1851275865Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 1852275865Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 1853275865Smav be_lun->ublockexp = fls(uss) - 1; 1854275865Smav be_lun->ublockoff = (uss - uos) % uss; 1855275865Smav } 1856275865Smav 1857229997Sken /* 1858229997Sken * Sanity check. The media size has to be at least one 1859229997Sken * sector long. 1860229997Sken */ 1861229997Sken if (be_lun->size_bytes < be_lun->blocksize) { 1862229997Sken error = EINVAL; 1863229997Sken snprintf(req->error_str, sizeof(req->error_str), 1864229997Sken "file %s size %ju < block size %u", be_lun->dev_path, 1865229997Sken (uintmax_t)be_lun->size_bytes, be_lun->blocksize); 1866229997Sken } 1867275920Smav 1868275920Smav be_lun->opttxferlen = CTLBLK_MAX_IO_SIZE / be_lun->blocksize; 1869229997Sken return (error); 1870229997Sken} 1871229997Sken 1872229997Skenstatic int 1873229997Skenctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1874229997Sken{ 1875229997Sken struct ctl_lun_create_params *params; 1876229997Sken struct vattr vattr; 1877229997Sken struct cdev *dev; 1878229997Sken struct cdevsw *devsw; 1879275865Smav char *value; 1880278672Smav int error, atomic, maxio, unmap; 1881275865Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1882229997Sken 1883272911Smav params = &be_lun->params; 1884229997Sken 1885229997Sken be_lun->dev_type = CTL_BE_BLOCK_DEV; 1886229997Sken be_lun->backend.dev.cdev = be_lun->vn->v_rdev; 1887229997Sken be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev, 1888229997Sken &be_lun->backend.dev.dev_ref); 1889229997Sken if (be_lun->backend.dev.csw == NULL) 1890229997Sken panic("Unable to retrieve device switch"); 1891275474Smav if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) { 1892269123Smav be_lun->dispatch = ctl_be_block_dispatch_zvol; 1893275474Smav be_lun->get_lba_status = ctl_be_block_gls_zvol; 1894275920Smav atomic = maxio = CTLBLK_MAX_IO_SIZE; 1895275920Smav } else { 1896269123Smav be_lun->dispatch = ctl_be_block_dispatch_dev; 1897275920Smav atomic = 0; 1898275920Smav maxio = be_lun->backend.dev.cdev->si_iosize_max; 1899275920Smav if (maxio <= 0) 1900275920Smav maxio = DFLTPHYS; 1901275920Smav if (maxio > CTLBLK_MAX_IO_SIZE) 1902275920Smav maxio = CTLBLK_MAX_IO_SIZE; 1903275920Smav } 1904269123Smav be_lun->lun_flush = ctl_be_block_flush_dev; 1905274154Smav be_lun->getattr = ctl_be_block_getattr_dev; 1906229997Sken 1907229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED); 1908229997Sken if (error) { 1909229997Sken snprintf(req->error_str, sizeof(req->error_str), 1910272911Smav "error getting vnode attributes for device %s", 1911272911Smav be_lun->dev_path); 1912229997Sken return (error); 1913229997Sken } 1914229997Sken 1915229997Sken dev = be_lun->vn->v_rdev; 1916229997Sken devsw = dev->si_devsw; 1917229997Sken if (!devsw->d_ioctl) { 1918229997Sken snprintf(req->error_str, sizeof(req->error_str), 1919272911Smav "no d_ioctl for device %s!", 1920229997Sken be_lun->dev_path); 1921229997Sken return (ENODEV); 1922229997Sken } 1923229997Sken 1924229997Sken error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, 1925229997Sken (caddr_t)&be_lun->blocksize, FREAD, 1926229997Sken curthread); 1927229997Sken if (error) { 1928229997Sken snprintf(req->error_str, sizeof(req->error_str), 1929272911Smav "error %d returned for DIOCGSECTORSIZE ioctl " 1930272911Smav "on %s!", error, be_lun->dev_path); 1931229997Sken return (error); 1932229997Sken } 1933229997Sken 1934229997Sken /* 1935229997Sken * If the user has asked for a blocksize that is greater than the 1936229997Sken * backing device's blocksize, we can do it only if the blocksize 1937229997Sken * the user is asking for is an even multiple of the underlying 1938229997Sken * device's blocksize. 1939229997Sken */ 1940229997Sken if ((params->blocksize_bytes != 0) 1941229997Sken && (params->blocksize_bytes > be_lun->blocksize)) { 1942229997Sken uint32_t bs_multiple, tmp_blocksize; 1943229997Sken 1944229997Sken bs_multiple = params->blocksize_bytes / be_lun->blocksize; 1945229997Sken 1946229997Sken tmp_blocksize = bs_multiple * be_lun->blocksize; 1947229997Sken 1948229997Sken if (tmp_blocksize == params->blocksize_bytes) { 1949229997Sken be_lun->blocksize = params->blocksize_bytes; 1950229997Sken } else { 1951229997Sken snprintf(req->error_str, sizeof(req->error_str), 1952272911Smav "requested blocksize %u is not an even " 1953229997Sken "multiple of backing device blocksize %u", 1954272911Smav params->blocksize_bytes, 1955229997Sken be_lun->blocksize); 1956229997Sken return (EINVAL); 1957229997Sken 1958229997Sken } 1959229997Sken } else if ((params->blocksize_bytes != 0) 1960229997Sken && (params->blocksize_bytes != be_lun->blocksize)) { 1961229997Sken snprintf(req->error_str, sizeof(req->error_str), 1962272911Smav "requested blocksize %u < backing device " 1963272911Smav "blocksize %u", params->blocksize_bytes, 1964229997Sken be_lun->blocksize); 1965229997Sken return (EINVAL); 1966229997Sken } 1967229997Sken 1968229997Sken error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 1969229997Sken (caddr_t)&be_lun->size_bytes, FREAD, 1970229997Sken curthread); 1971229997Sken if (error) { 1972229997Sken snprintf(req->error_str, sizeof(req->error_str), 1973272911Smav "error %d returned for DIOCGMEDIASIZE " 1974272911Smav " ioctl on %s!", error, 1975232604Strasz be_lun->dev_path); 1976229997Sken return (error); 1977229997Sken } 1978229997Sken 1979232604Strasz if (params->lun_size_bytes != 0) { 1980232604Strasz if (params->lun_size_bytes > be_lun->size_bytes) { 1981232604Strasz snprintf(req->error_str, sizeof(req->error_str), 1982272911Smav "requested LUN size %ju > backing device " 1983272911Smav "size %ju", 1984232604Strasz (uintmax_t)params->lun_size_bytes, 1985232604Strasz (uintmax_t)be_lun->size_bytes); 1986232604Strasz return (EINVAL); 1987232604Strasz } 1988232604Strasz 1989232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1990232604Strasz } 1991232604Strasz 1992264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE, 1993264191Smav (caddr_t)&ps, FREAD, curthread); 1994264191Smav if (error) 1995264191Smav ps = po = 0; 1996264191Smav else { 1997264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET, 1998264191Smav (caddr_t)&po, FREAD, curthread); 1999264191Smav if (error) 2000264191Smav po = 0; 2001264191Smav } 2002275865Smav us = ps; 2003275865Smav uo = po; 2004275865Smav 2005275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 2006275865Smav if (value != NULL) 2007275865Smav ctl_expand_number(value, &ps); 2008275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 2009275865Smav if (value != NULL) 2010275865Smav ctl_expand_number(value, &po); 2011264191Smav pss = ps / be_lun->blocksize; 2012264191Smav pos = po / be_lun->blocksize; 2013264191Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 2014264191Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 2015264191Smav be_lun->pblockexp = fls(pss) - 1; 2016264191Smav be_lun->pblockoff = (pss - pos) % pss; 2017264191Smav } 2018264191Smav 2019275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 2020275865Smav if (value != NULL) 2021275865Smav ctl_expand_number(value, &us); 2022275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 2023275865Smav if (value != NULL) 2024275865Smav ctl_expand_number(value, &uo); 2025275865Smav uss = us / be_lun->blocksize; 2026275865Smav uos = uo / be_lun->blocksize; 2027275865Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 2028275865Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 2029275865Smav be_lun->ublockexp = fls(uss) - 1; 2030275865Smav be_lun->ublockoff = (uss - uos) % uss; 2031275865Smav } 2032275865Smav 2033275920Smav be_lun->atomicblock = atomic / be_lun->blocksize; 2034275920Smav be_lun->opttxferlen = maxio / be_lun->blocksize; 2035278672Smav 2036278672Smav if (be_lun->dispatch == ctl_be_block_dispatch_zvol) { 2037278672Smav unmap = 1; 2038278672Smav } else { 2039278672Smav struct diocgattr_arg arg; 2040278672Smav 2041278672Smav strlcpy(arg.name, "GEOM::candelete", sizeof(arg.name)); 2042278672Smav arg.len = sizeof(arg.value.i); 2043278672Smav error = devsw->d_ioctl(dev, DIOCGATTR, 2044278672Smav (caddr_t)&arg, FREAD, curthread); 2045278672Smav unmap = (error == 0) ? arg.value.i : 0; 2046278672Smav } 2047278672Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "unmap"); 2048278672Smav if (value != NULL) 2049278672Smav unmap = (strcmp(value, "on") == 0); 2050278672Smav if (unmap) 2051278672Smav be_lun->unmap = ctl_be_block_unmap_dev; 2052278672Smav 2053229997Sken return (0); 2054229997Sken} 2055229997Sken 2056229997Skenstatic int 2057229997Skenctl_be_block_close(struct ctl_be_block_lun *be_lun) 2058229997Sken{ 2059229997Sken DROP_GIANT(); 2060229997Sken if (be_lun->vn) { 2061229997Sken int flags = FREAD | FWRITE; 2062229997Sken 2063229997Sken switch (be_lun->dev_type) { 2064229997Sken case CTL_BE_BLOCK_DEV: 2065229997Sken if (be_lun->backend.dev.csw) { 2066229997Sken dev_relthread(be_lun->backend.dev.cdev, 2067229997Sken be_lun->backend.dev.dev_ref); 2068229997Sken be_lun->backend.dev.csw = NULL; 2069229997Sken be_lun->backend.dev.cdev = NULL; 2070229997Sken } 2071229997Sken break; 2072229997Sken case CTL_BE_BLOCK_FILE: 2073229997Sken break; 2074229997Sken case CTL_BE_BLOCK_NONE: 2075258871Strasz break; 2076229997Sken default: 2077229997Sken panic("Unexpected backend type."); 2078229997Sken break; 2079229997Sken } 2080229997Sken 2081229997Sken (void)vn_close(be_lun->vn, flags, NOCRED, curthread); 2082229997Sken be_lun->vn = NULL; 2083229997Sken 2084229997Sken switch (be_lun->dev_type) { 2085229997Sken case CTL_BE_BLOCK_DEV: 2086229997Sken break; 2087229997Sken case CTL_BE_BLOCK_FILE: 2088229997Sken if (be_lun->backend.file.cred != NULL) { 2089229997Sken crfree(be_lun->backend.file.cred); 2090229997Sken be_lun->backend.file.cred = NULL; 2091229997Sken } 2092229997Sken break; 2093229997Sken case CTL_BE_BLOCK_NONE: 2094258871Strasz break; 2095229997Sken default: 2096229997Sken panic("Unexpected backend type."); 2097229997Sken break; 2098229997Sken } 2099272911Smav be_lun->dev_type = CTL_BE_BLOCK_NONE; 2100229997Sken } 2101229997Sken PICKUP_GIANT(); 2102229997Sken 2103229997Sken return (0); 2104229997Sken} 2105229997Sken 2106229997Skenstatic int 2107229997Skenctl_be_block_open(struct ctl_be_block_softc *softc, 2108229997Sken struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 2109229997Sken{ 2110229997Sken struct nameidata nd; 2111229997Sken int flags; 2112229997Sken int error; 2113229997Sken 2114229997Sken /* 2115229997Sken * XXX KDM allow a read-only option? 2116229997Sken */ 2117229997Sken flags = FREAD | FWRITE; 2118229997Sken error = 0; 2119229997Sken 2120229997Sken if (rootvnode == NULL) { 2121229997Sken snprintf(req->error_str, sizeof(req->error_str), 2122272911Smav "Root filesystem is not mounted"); 2123229997Sken return (1); 2124229997Sken } 2125229997Sken 2126229997Sken if (!curthread->td_proc->p_fd->fd_cdir) { 2127229997Sken curthread->td_proc->p_fd->fd_cdir = rootvnode; 2128229997Sken VREF(rootvnode); 2129229997Sken } 2130229997Sken if (!curthread->td_proc->p_fd->fd_rdir) { 2131229997Sken curthread->td_proc->p_fd->fd_rdir = rootvnode; 2132229997Sken VREF(rootvnode); 2133229997Sken } 2134229997Sken if (!curthread->td_proc->p_fd->fd_jdir) { 2135229997Sken curthread->td_proc->p_fd->fd_jdir = rootvnode; 2136229997Sken VREF(rootvnode); 2137229997Sken } 2138229997Sken 2139229997Sken again: 2140229997Sken NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread); 2141229997Sken error = vn_open(&nd, &flags, 0, NULL); 2142229997Sken if (error) { 2143229997Sken /* 2144229997Sken * This is the only reasonable guess we can make as far as 2145229997Sken * path if the user doesn't give us a fully qualified path. 2146229997Sken * If they want to specify a file, they need to specify the 2147229997Sken * full path. 2148229997Sken */ 2149229997Sken if (be_lun->dev_path[0] != '/') { 2150229997Sken char *dev_path = "/dev/"; 2151229997Sken char *dev_name; 2152229997Sken 2153229997Sken /* Try adding device path at beginning of name */ 2154229997Sken dev_name = malloc(strlen(be_lun->dev_path) 2155229997Sken + strlen(dev_path) + 1, 2156229997Sken M_CTLBLK, M_WAITOK); 2157229997Sken if (dev_name) { 2158229997Sken sprintf(dev_name, "%s%s", dev_path, 2159229997Sken be_lun->dev_path); 2160229997Sken free(be_lun->dev_path, M_CTLBLK); 2161229997Sken be_lun->dev_path = dev_name; 2162229997Sken goto again; 2163229997Sken } 2164229997Sken } 2165229997Sken snprintf(req->error_str, sizeof(req->error_str), 2166272911Smav "error opening %s: %d", be_lun->dev_path, error); 2167229997Sken return (error); 2168229997Sken } 2169229997Sken 2170229997Sken NDFREE(&nd, NDF_ONLY_PNBUF); 2171229997Sken 2172229997Sken be_lun->vn = nd.ni_vp; 2173229997Sken 2174229997Sken /* We only support disks and files. */ 2175229997Sken if (vn_isdisk(be_lun->vn, &error)) { 2176229997Sken error = ctl_be_block_open_dev(be_lun, req); 2177229997Sken } else if (be_lun->vn->v_type == VREG) { 2178229997Sken error = ctl_be_block_open_file(be_lun, req); 2179229997Sken } else { 2180229997Sken error = EINVAL; 2181229997Sken snprintf(req->error_str, sizeof(req->error_str), 2182258871Strasz "%s is not a disk or plain file", be_lun->dev_path); 2183229997Sken } 2184229997Sken VOP_UNLOCK(be_lun->vn, 0); 2185229997Sken 2186229997Sken if (error != 0) { 2187229997Sken ctl_be_block_close(be_lun); 2188229997Sken return (error); 2189229997Sken } 2190229997Sken 2191229997Sken be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2192229997Sken be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 2193229997Sken 2194229997Sken return (0); 2195229997Sken} 2196229997Sken 2197229997Skenstatic int 2198229997Skenctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2199229997Sken{ 2200229997Sken struct ctl_be_block_lun *be_lun; 2201229997Sken struct ctl_lun_create_params *params; 2202267481Smav char num_thread_str[16]; 2203229997Sken char tmpstr[32]; 2204267481Smav char *value; 2205278672Smav int retval, num_threads; 2206267481Smav int tmp_num_threads; 2207229997Sken 2208229997Sken params = &req->reqdata.create; 2209229997Sken retval = 0; 2210272911Smav req->status = CTL_LUN_OK; 2211229997Sken 2212229997Sken num_threads = cbb_num_threads; 2213229997Sken 2214229997Sken be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK); 2215229997Sken 2216272911Smav be_lun->params = req->reqdata.create; 2217229997Sken be_lun->softc = softc; 2218229997Sken STAILQ_INIT(&be_lun->input_queue); 2219275474Smav STAILQ_INIT(&be_lun->config_read_queue); 2220229997Sken STAILQ_INIT(&be_lun->config_write_queue); 2221229997Sken STAILQ_INIT(&be_lun->datamove_queue); 2222229997Sken sprintf(be_lun->lunname, "cblk%d", softc->num_luns); 2223267877Smav mtx_init(&be_lun->io_lock, "cblk io lock", NULL, MTX_DEF); 2224267877Smav mtx_init(&be_lun->queue_lock, "cblk queue lock", NULL, MTX_DEF); 2225268280Smav ctl_init_opts(&be_lun->ctl_be_lun.options, 2226268280Smav req->num_be_args, req->kern_be_args); 2227229997Sken 2228264886Smav be_lun->lun_zone = uma_zcreate(be_lun->lunname, CTLBLK_MAX_SEG, 2229256995Smav NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0); 2230229997Sken 2231229997Sken if (be_lun->lun_zone == NULL) { 2232229997Sken snprintf(req->error_str, sizeof(req->error_str), 2233272911Smav "error allocating UMA zone"); 2234229997Sken goto bailout_error; 2235229997Sken } 2236229997Sken 2237229997Sken if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 2238229997Sken be_lun->ctl_be_lun.lun_type = params->device_type; 2239229997Sken else 2240229997Sken be_lun->ctl_be_lun.lun_type = T_DIRECT; 2241229997Sken 2242229997Sken if (be_lun->ctl_be_lun.lun_type == T_DIRECT) { 2243268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "file"); 2244267499Smav if (value == NULL) { 2245229997Sken snprintf(req->error_str, sizeof(req->error_str), 2246272911Smav "no file argument specified"); 2247229997Sken goto bailout_error; 2248229997Sken } 2249267499Smav be_lun->dev_path = strdup(value, M_CTLBLK); 2250272911Smav be_lun->blocksize = 512; 2251272911Smav be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2252229997Sken 2253229997Sken retval = ctl_be_block_open(softc, be_lun, req); 2254229997Sken if (retval != 0) { 2255229997Sken retval = 0; 2256272911Smav req->status = CTL_LUN_WARNING; 2257229997Sken } 2258229997Sken } else { 2259229997Sken /* 2260229997Sken * For processor devices, we don't have any size. 2261229997Sken */ 2262229997Sken be_lun->blocksize = 0; 2263264191Smav be_lun->pblockexp = 0; 2264264191Smav be_lun->pblockoff = 0; 2265275865Smav be_lun->ublockexp = 0; 2266275865Smav be_lun->ublockoff = 0; 2267229997Sken be_lun->size_blocks = 0; 2268229997Sken be_lun->size_bytes = 0; 2269229997Sken be_lun->ctl_be_lun.maxlba = 0; 2270229997Sken 2271229997Sken /* 2272229997Sken * Default to just 1 thread for processor devices. 2273229997Sken */ 2274229997Sken num_threads = 1; 2275229997Sken } 2276229997Sken 2277229997Sken /* 2278229997Sken * XXX This searching loop might be refactored to be combined with 2279229997Sken * the loop above, 2280229997Sken */ 2281268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "num_threads"); 2282267481Smav if (value != NULL) { 2283267481Smav tmp_num_threads = strtol(value, NULL, 0); 2284229997Sken 2285267481Smav /* 2286267481Smav * We don't let the user specify less than one 2287267481Smav * thread, but hope he's clueful enough not to 2288267481Smav * specify 1000 threads. 2289267481Smav */ 2290267481Smav if (tmp_num_threads < 1) { 2291267481Smav snprintf(req->error_str, sizeof(req->error_str), 2292272911Smav "invalid number of threads %s", 2293272911Smav num_thread_str); 2294267481Smav goto bailout_error; 2295229997Sken } 2296267481Smav num_threads = tmp_num_threads; 2297229997Sken } 2298229997Sken 2299229997Sken be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED; 2300229997Sken be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY; 2301272911Smav if (be_lun->vn == NULL) 2302272911Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_OFFLINE; 2303278672Smav if (be_lun->unmap != NULL) 2304264274Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 2305275568Smav if (be_lun->dispatch != ctl_be_block_dispatch_dev) 2306275568Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_SERSEQ_READ; 2307229997Sken be_lun->ctl_be_lun.be_lun = be_lun; 2308272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2309272911Smav 0 : (be_lun->size_blocks - 1); 2310229997Sken be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2311264191Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2312264191Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2313275865Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2314275865Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2315275920Smav be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock; 2316275920Smav be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen; 2317229997Sken /* Tell the user the blocksize we ended up using */ 2318272911Smav params->lun_size_bytes = be_lun->size_bytes; 2319229997Sken params->blocksize_bytes = be_lun->blocksize; 2320229997Sken if (params->flags & CTL_LUN_FLAG_ID_REQ) { 2321229997Sken be_lun->ctl_be_lun.req_lun_id = params->req_lun_id; 2322229997Sken be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ; 2323229997Sken } else 2324229997Sken be_lun->ctl_be_lun.req_lun_id = 0; 2325229997Sken 2326229997Sken be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown; 2327229997Sken be_lun->ctl_be_lun.lun_config_status = 2328229997Sken ctl_be_block_lun_config_status; 2329229997Sken be_lun->ctl_be_lun.be = &ctl_be_block_driver; 2330229997Sken 2331229997Sken if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 2332229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d", 2333229997Sken softc->num_luns); 2334229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr, 2335275953Smav MIN(sizeof(be_lun->ctl_be_lun.serial_num), 2336229997Sken sizeof(tmpstr))); 2337229997Sken 2338229997Sken /* Tell the user what we used for a serial number */ 2339229997Sken strncpy((char *)params->serial_num, tmpstr, 2340275953Smav MIN(sizeof(params->serial_num), sizeof(tmpstr))); 2341229997Sken } else { 2342229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, 2343229997Sken params->serial_num, 2344275953Smav MIN(sizeof(be_lun->ctl_be_lun.serial_num), 2345229997Sken sizeof(params->serial_num))); 2346229997Sken } 2347229997Sken if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 2348229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns); 2349229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr, 2350275953Smav MIN(sizeof(be_lun->ctl_be_lun.device_id), 2351229997Sken sizeof(tmpstr))); 2352229997Sken 2353229997Sken /* Tell the user what we used for a device ID */ 2354229997Sken strncpy((char *)params->device_id, tmpstr, 2355275953Smav MIN(sizeof(params->device_id), sizeof(tmpstr))); 2356229997Sken } else { 2357229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, 2358229997Sken params->device_id, 2359275953Smav MIN(sizeof(be_lun->ctl_be_lun.device_id), 2360275953Smav sizeof(params->device_id))); 2361229997Sken } 2362229997Sken 2363229997Sken TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun); 2364229997Sken 2365229997Sken be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK, 2366229997Sken taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 2367229997Sken 2368229997Sken if (be_lun->io_taskqueue == NULL) { 2369229997Sken snprintf(req->error_str, sizeof(req->error_str), 2370272911Smav "unable to create taskqueue"); 2371229997Sken goto bailout_error; 2372229997Sken } 2373229997Sken 2374229997Sken /* 2375229997Sken * Note that we start the same number of threads by default for 2376229997Sken * both the file case and the block device case. For the file 2377229997Sken * case, we need multiple threads to allow concurrency, because the 2378229997Sken * vnode interface is designed to be a blocking interface. For the 2379229997Sken * block device case, ZFS zvols at least will block the caller's 2380229997Sken * context in many instances, and so we need multiple threads to 2381229997Sken * overcome that problem. Other block devices don't need as many 2382229997Sken * threads, but they shouldn't cause too many problems. 2383229997Sken * 2384229997Sken * If the user wants to just have a single thread for a block 2385229997Sken * device, he can specify that when the LUN is created, or change 2386229997Sken * the tunable/sysctl to alter the default number of threads. 2387229997Sken */ 2388229997Sken retval = taskqueue_start_threads(&be_lun->io_taskqueue, 2389229997Sken /*num threads*/num_threads, 2390229997Sken /*priority*/PWAIT, 2391229997Sken /*thread name*/ 2392229997Sken "%s taskq", be_lun->lunname); 2393229997Sken 2394229997Sken if (retval != 0) 2395229997Sken goto bailout_error; 2396229997Sken 2397229997Sken be_lun->num_threads = num_threads; 2398229997Sken 2399229997Sken mtx_lock(&softc->lock); 2400229997Sken softc->num_luns++; 2401229997Sken STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links); 2402229997Sken 2403229997Sken mtx_unlock(&softc->lock); 2404229997Sken 2405229997Sken retval = ctl_add_lun(&be_lun->ctl_be_lun); 2406229997Sken if (retval != 0) { 2407229997Sken mtx_lock(&softc->lock); 2408229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2409229997Sken links); 2410229997Sken softc->num_luns--; 2411229997Sken mtx_unlock(&softc->lock); 2412229997Sken snprintf(req->error_str, sizeof(req->error_str), 2413272911Smav "ctl_add_lun() returned error %d, see dmesg for " 2414272911Smav "details", retval); 2415229997Sken retval = 0; 2416229997Sken goto bailout_error; 2417229997Sken } 2418229997Sken 2419229997Sken mtx_lock(&softc->lock); 2420229997Sken 2421229997Sken /* 2422229997Sken * Tell the config_status routine that we're waiting so it won't 2423229997Sken * clean up the LUN in the event of an error. 2424229997Sken */ 2425229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2426229997Sken 2427229997Sken while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) { 2428229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2429229997Sken if (retval == EINTR) 2430229997Sken break; 2431229997Sken } 2432229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2433229997Sken 2434229997Sken if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) { 2435229997Sken snprintf(req->error_str, sizeof(req->error_str), 2436272911Smav "LUN configuration error, see dmesg for details"); 2437229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2438229997Sken links); 2439229997Sken softc->num_luns--; 2440229997Sken mtx_unlock(&softc->lock); 2441229997Sken goto bailout_error; 2442229997Sken } else { 2443229997Sken params->req_lun_id = be_lun->ctl_be_lun.lun_id; 2444229997Sken } 2445229997Sken 2446229997Sken mtx_unlock(&softc->lock); 2447229997Sken 2448229997Sken be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id, 2449229997Sken be_lun->blocksize, 2450229997Sken DEVSTAT_ALL_SUPPORTED, 2451229997Sken be_lun->ctl_be_lun.lun_type 2452229997Sken | DEVSTAT_TYPE_IF_OTHER, 2453229997Sken DEVSTAT_PRIORITY_OTHER); 2454229997Sken 2455229997Sken return (retval); 2456229997Sken 2457229997Skenbailout_error: 2458229997Sken req->status = CTL_LUN_ERROR; 2459229997Sken 2460267429Smav if (be_lun->io_taskqueue != NULL) 2461267429Smav taskqueue_free(be_lun->io_taskqueue); 2462229997Sken ctl_be_block_close(be_lun); 2463267429Smav if (be_lun->dev_path != NULL) 2464267429Smav free(be_lun->dev_path, M_CTLBLK); 2465267429Smav if (be_lun->lun_zone != NULL) 2466267429Smav uma_zdestroy(be_lun->lun_zone); 2467268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2468267877Smav mtx_destroy(&be_lun->queue_lock); 2469267877Smav mtx_destroy(&be_lun->io_lock); 2470229997Sken free(be_lun, M_CTLBLK); 2471229997Sken 2472229997Sken return (retval); 2473229997Sken} 2474229997Sken 2475229997Skenstatic int 2476229997Skenctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2477229997Sken{ 2478229997Sken struct ctl_lun_rm_params *params; 2479229997Sken struct ctl_be_block_lun *be_lun; 2480229997Sken int retval; 2481229997Sken 2482229997Sken params = &req->reqdata.rm; 2483229997Sken 2484229997Sken mtx_lock(&softc->lock); 2485229997Sken 2486229997Sken be_lun = NULL; 2487229997Sken 2488229997Sken STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2489229997Sken if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2490229997Sken break; 2491229997Sken } 2492229997Sken mtx_unlock(&softc->lock); 2493229997Sken 2494229997Sken if (be_lun == NULL) { 2495229997Sken snprintf(req->error_str, sizeof(req->error_str), 2496272911Smav "LUN %u is not managed by the block backend", 2497272911Smav params->lun_id); 2498229997Sken goto bailout_error; 2499229997Sken } 2500229997Sken 2501229997Sken retval = ctl_disable_lun(&be_lun->ctl_be_lun); 2502229997Sken 2503229997Sken if (retval != 0) { 2504229997Sken snprintf(req->error_str, sizeof(req->error_str), 2505272911Smav "error %d returned from ctl_disable_lun() for " 2506272911Smav "LUN %d", retval, params->lun_id); 2507229997Sken goto bailout_error; 2508229997Sken 2509229997Sken } 2510229997Sken 2511229997Sken retval = ctl_invalidate_lun(&be_lun->ctl_be_lun); 2512229997Sken if (retval != 0) { 2513229997Sken snprintf(req->error_str, sizeof(req->error_str), 2514272911Smav "error %d returned from ctl_invalidate_lun() for " 2515272911Smav "LUN %d", retval, params->lun_id); 2516229997Sken goto bailout_error; 2517229997Sken } 2518229997Sken 2519229997Sken mtx_lock(&softc->lock); 2520229997Sken 2521229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2522229997Sken 2523229997Sken while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2524229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2525229997Sken if (retval == EINTR) 2526229997Sken break; 2527229997Sken } 2528229997Sken 2529229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2530229997Sken 2531229997Sken if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2532229997Sken snprintf(req->error_str, sizeof(req->error_str), 2533272911Smav "interrupted waiting for LUN to be freed"); 2534229997Sken mtx_unlock(&softc->lock); 2535229997Sken goto bailout_error; 2536229997Sken } 2537229997Sken 2538229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links); 2539229997Sken 2540229997Sken softc->num_luns--; 2541229997Sken mtx_unlock(&softc->lock); 2542229997Sken 2543229997Sken taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task); 2544229997Sken 2545229997Sken taskqueue_free(be_lun->io_taskqueue); 2546229997Sken 2547229997Sken ctl_be_block_close(be_lun); 2548229997Sken 2549229997Sken if (be_lun->disk_stats != NULL) 2550229997Sken devstat_remove_entry(be_lun->disk_stats); 2551229997Sken 2552229997Sken uma_zdestroy(be_lun->lun_zone); 2553229997Sken 2554268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2555229997Sken free(be_lun->dev_path, M_CTLBLK); 2556267877Smav mtx_destroy(&be_lun->queue_lock); 2557267877Smav mtx_destroy(&be_lun->io_lock); 2558229997Sken free(be_lun, M_CTLBLK); 2559229997Sken 2560229997Sken req->status = CTL_LUN_OK; 2561229997Sken 2562229997Sken return (0); 2563229997Sken 2564229997Skenbailout_error: 2565229997Sken 2566229997Sken req->status = CTL_LUN_ERROR; 2567229997Sken 2568229997Sken return (0); 2569229997Sken} 2570229997Sken 2571232604Straszstatic int 2572232604Straszctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 2573232604Strasz struct ctl_lun_req *req) 2574232604Strasz{ 2575232604Strasz struct vattr vattr; 2576232604Strasz int error; 2577272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2578232604Strasz 2579232604Strasz if (params->lun_size_bytes != 0) { 2580232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2581232604Strasz } else { 2582271794Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 2583232604Strasz error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 2584271794Smav VOP_UNLOCK(be_lun->vn, 0); 2585232604Strasz if (error != 0) { 2586232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2587232604Strasz "error calling VOP_GETATTR() for file %s", 2588232604Strasz be_lun->dev_path); 2589232604Strasz return (error); 2590232604Strasz } 2591232604Strasz 2592232604Strasz be_lun->size_bytes = vattr.va_size; 2593232604Strasz } 2594232604Strasz 2595232604Strasz return (0); 2596232604Strasz} 2597232604Strasz 2598232604Straszstatic int 2599232604Straszctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 2600232604Strasz struct ctl_lun_req *req) 2601232604Strasz{ 2602271794Smav struct ctl_be_block_devdata *dev_data; 2603232604Strasz int error; 2604272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2605232604Strasz uint64_t size_bytes; 2606232604Strasz 2607271794Smav dev_data = &be_lun->backend.dev; 2608271794Smav if (!dev_data->csw->d_ioctl) { 2609232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2610272911Smav "no d_ioctl for device %s!", be_lun->dev_path); 2611232604Strasz return (ENODEV); 2612232604Strasz } 2613232604Strasz 2614271794Smav error = dev_data->csw->d_ioctl(dev_data->cdev, DIOCGMEDIASIZE, 2615232604Strasz (caddr_t)&size_bytes, FREAD, 2616232604Strasz curthread); 2617232604Strasz if (error) { 2618232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2619272911Smav "error %d returned for DIOCGMEDIASIZE ioctl " 2620272911Smav "on %s!", error, be_lun->dev_path); 2621232604Strasz return (error); 2622232604Strasz } 2623232604Strasz 2624232604Strasz if (params->lun_size_bytes != 0) { 2625232604Strasz if (params->lun_size_bytes > size_bytes) { 2626232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2627272911Smav "requested LUN size %ju > backing device " 2628272911Smav "size %ju", 2629232604Strasz (uintmax_t)params->lun_size_bytes, 2630232604Strasz (uintmax_t)size_bytes); 2631232604Strasz return (EINVAL); 2632232604Strasz } 2633232604Strasz 2634232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2635232604Strasz } else { 2636232604Strasz be_lun->size_bytes = size_bytes; 2637232604Strasz } 2638232604Strasz 2639232604Strasz return (0); 2640232604Strasz} 2641232604Strasz 2642232604Straszstatic int 2643232604Straszctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2644232604Strasz{ 2645232604Strasz struct ctl_lun_modify_params *params; 2646232604Strasz struct ctl_be_block_lun *be_lun; 2647271794Smav uint64_t oldsize; 2648241896Skib int error; 2649232604Strasz 2650232604Strasz params = &req->reqdata.modify; 2651232604Strasz 2652232604Strasz mtx_lock(&softc->lock); 2653232604Strasz be_lun = NULL; 2654232604Strasz STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2655232604Strasz if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2656232604Strasz break; 2657232604Strasz } 2658232604Strasz mtx_unlock(&softc->lock); 2659232604Strasz 2660232604Strasz if (be_lun == NULL) { 2661232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2662272911Smav "LUN %u is not managed by the block backend", 2663272911Smav params->lun_id); 2664232604Strasz goto bailout_error; 2665232604Strasz } 2666232604Strasz 2667272911Smav be_lun->params.lun_size_bytes = params->lun_size_bytes; 2668232604Strasz 2669274253Smav oldsize = be_lun->size_bytes; 2670272911Smav if (be_lun->vn == NULL) 2671272911Smav error = ctl_be_block_open(softc, be_lun, req); 2672285030Smav else if (vn_isdisk(be_lun->vn, &error)) 2673285030Smav error = ctl_be_block_modify_dev(be_lun, req); 2674272911Smav else if (be_lun->vn->v_type == VREG) 2675232604Strasz error = ctl_be_block_modify_file(be_lun, req); 2676232604Strasz else 2677285030Smav error = EINVAL; 2678232604Strasz 2679274253Smav if (error == 0 && be_lun->size_bytes != oldsize) { 2680271794Smav be_lun->size_blocks = be_lun->size_bytes >> 2681271794Smav be_lun->blocksize_shift; 2682232604Strasz 2683271794Smav /* 2684271794Smav * The maximum LBA is the size - 1. 2685271794Smav * 2686271794Smav * XXX: Note that this field is being updated without locking, 2687271794Smav * which might cause problems on 32-bit architectures. 2688271794Smav */ 2689278672Smav if (be_lun->unmap != NULL) 2690278672Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 2691272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2692272911Smav 0 : (be_lun->size_blocks - 1); 2693272911Smav be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2694272911Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2695272911Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2696275865Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2697275865Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2698275920Smav be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock; 2699275920Smav be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen; 2700271794Smav ctl_lun_capacity_changed(&be_lun->ctl_be_lun); 2701272911Smav if (oldsize == 0 && be_lun->size_blocks != 0) 2702272911Smav ctl_lun_online(&be_lun->ctl_be_lun); 2703271794Smav } 2704232604Strasz 2705232604Strasz /* Tell the user the exact size we ended up using */ 2706232604Strasz params->lun_size_bytes = be_lun->size_bytes; 2707232604Strasz 2708272911Smav req->status = error ? CTL_LUN_WARNING : CTL_LUN_OK; 2709232604Strasz 2710232604Strasz return (0); 2711232604Strasz 2712232604Straszbailout_error: 2713232604Strasz req->status = CTL_LUN_ERROR; 2714232604Strasz 2715232604Strasz return (0); 2716232604Strasz} 2717232604Strasz 2718229997Skenstatic void 2719229997Skenctl_be_block_lun_shutdown(void *be_lun) 2720229997Sken{ 2721229997Sken struct ctl_be_block_lun *lun; 2722229997Sken struct ctl_be_block_softc *softc; 2723229997Sken 2724229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2725229997Sken 2726229997Sken softc = lun->softc; 2727229997Sken 2728229997Sken mtx_lock(&softc->lock); 2729229997Sken lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED; 2730229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2731229997Sken wakeup(lun); 2732229997Sken mtx_unlock(&softc->lock); 2733229997Sken 2734229997Sken} 2735229997Sken 2736229997Skenstatic void 2737229997Skenctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status) 2738229997Sken{ 2739229997Sken struct ctl_be_block_lun *lun; 2740229997Sken struct ctl_be_block_softc *softc; 2741229997Sken 2742229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2743229997Sken softc = lun->softc; 2744229997Sken 2745229997Sken if (status == CTL_LUN_CONFIG_OK) { 2746229997Sken mtx_lock(&softc->lock); 2747229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2748229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2749229997Sken wakeup(lun); 2750229997Sken mtx_unlock(&softc->lock); 2751229997Sken 2752229997Sken /* 2753229997Sken * We successfully added the LUN, attempt to enable it. 2754229997Sken */ 2755229997Sken if (ctl_enable_lun(&lun->ctl_be_lun) != 0) { 2756229997Sken printf("%s: ctl_enable_lun() failed!\n", __func__); 2757229997Sken if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) { 2758229997Sken printf("%s: ctl_invalidate_lun() failed!\n", 2759229997Sken __func__); 2760229997Sken } 2761229997Sken } 2762229997Sken 2763229997Sken return; 2764229997Sken } 2765229997Sken 2766229997Sken 2767229997Sken mtx_lock(&softc->lock); 2768229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2769229997Sken lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR; 2770229997Sken wakeup(lun); 2771229997Sken mtx_unlock(&softc->lock); 2772229997Sken} 2773229997Sken 2774229997Sken 2775229997Skenstatic int 2776229997Skenctl_be_block_config_write(union ctl_io *io) 2777229997Sken{ 2778229997Sken struct ctl_be_block_lun *be_lun; 2779229997Sken struct ctl_be_lun *ctl_be_lun; 2780229997Sken int retval; 2781229997Sken 2782229997Sken retval = 0; 2783229997Sken 2784229997Sken DPRINTF("entered\n"); 2785229997Sken 2786229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2787229997Sken CTL_PRIV_BACKEND_LUN].ptr; 2788229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2789229997Sken 2790229997Sken switch (io->scsiio.cdb[0]) { 2791229997Sken case SYNCHRONIZE_CACHE: 2792229997Sken case SYNCHRONIZE_CACHE_16: 2793264274Smav case WRITE_SAME_10: 2794264274Smav case WRITE_SAME_16: 2795264274Smav case UNMAP: 2796229997Sken /* 2797229997Sken * The upper level CTL code will filter out any CDBs with 2798229997Sken * the immediate bit set and return the proper error. 2799229997Sken * 2800229997Sken * We don't really need to worry about what LBA range the 2801229997Sken * user asked to be synced out. When they issue a sync 2802229997Sken * cache command, we'll sync out the whole thing. 2803229997Sken */ 2804267877Smav mtx_lock(&be_lun->queue_lock); 2805229997Sken STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr, 2806229997Sken links); 2807267877Smav mtx_unlock(&be_lun->queue_lock); 2808229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 2809229997Sken break; 2810229997Sken case START_STOP_UNIT: { 2811229997Sken struct scsi_start_stop_unit *cdb; 2812229997Sken 2813229997Sken cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 2814229997Sken 2815229997Sken if (cdb->how & SSS_START) 2816229997Sken retval = ctl_start_lun(ctl_be_lun); 2817229997Sken else { 2818229997Sken retval = ctl_stop_lun(ctl_be_lun); 2819229997Sken /* 2820229997Sken * XXX KDM Copan-specific offline behavior. 2821229997Sken * Figure out a reasonable way to port this? 2822229997Sken */ 2823229997Sken#ifdef NEEDTOPORT 2824229997Sken if ((retval == 0) 2825229997Sken && (cdb->byte2 & SSS_ONOFFLINE)) 2826229997Sken retval = ctl_lun_offline(ctl_be_lun); 2827229997Sken#endif 2828229997Sken } 2829229997Sken 2830229997Sken /* 2831229997Sken * In general, the above routines should not fail. They 2832229997Sken * just set state for the LUN. So we've got something 2833229997Sken * pretty wrong here if we can't start or stop the LUN. 2834229997Sken */ 2835229997Sken if (retval != 0) { 2836229997Sken ctl_set_internal_failure(&io->scsiio, 2837229997Sken /*sks_valid*/ 1, 2838229997Sken /*retry_count*/ 0xf051); 2839229997Sken retval = CTL_RETVAL_COMPLETE; 2840229997Sken } else { 2841229997Sken ctl_set_success(&io->scsiio); 2842229997Sken } 2843229997Sken ctl_config_write_done(io); 2844229997Sken break; 2845229997Sken } 2846229997Sken default: 2847229997Sken ctl_set_invalid_opcode(&io->scsiio); 2848229997Sken ctl_config_write_done(io); 2849229997Sken retval = CTL_RETVAL_COMPLETE; 2850229997Sken break; 2851229997Sken } 2852229997Sken 2853229997Sken return (retval); 2854229997Sken} 2855229997Sken 2856229997Skenstatic int 2857229997Skenctl_be_block_config_read(union ctl_io *io) 2858229997Sken{ 2859275474Smav struct ctl_be_block_lun *be_lun; 2860275474Smav struct ctl_be_lun *ctl_be_lun; 2861275474Smav int retval = 0; 2862275474Smav 2863275474Smav DPRINTF("entered\n"); 2864275474Smav 2865275474Smav ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2866275474Smav CTL_PRIV_BACKEND_LUN].ptr; 2867275474Smav be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2868275474Smav 2869275474Smav switch (io->scsiio.cdb[0]) { 2870275474Smav case SERVICE_ACTION_IN: 2871275474Smav if (io->scsiio.cdb[1] == SGLS_SERVICE_ACTION) { 2872275474Smav mtx_lock(&be_lun->queue_lock); 2873275474Smav STAILQ_INSERT_TAIL(&be_lun->config_read_queue, 2874275474Smav &io->io_hdr, links); 2875275474Smav mtx_unlock(&be_lun->queue_lock); 2876275474Smav taskqueue_enqueue(be_lun->io_taskqueue, 2877275474Smav &be_lun->io_task); 2878275474Smav retval = CTL_RETVAL_QUEUED; 2879275474Smav break; 2880275474Smav } 2881275474Smav ctl_set_invalid_field(&io->scsiio, 2882275474Smav /*sks_valid*/ 1, 2883275474Smav /*command*/ 1, 2884275474Smav /*field*/ 1, 2885275474Smav /*bit_valid*/ 1, 2886275474Smav /*bit*/ 4); 2887275474Smav ctl_config_read_done(io); 2888275474Smav retval = CTL_RETVAL_COMPLETE; 2889275474Smav break; 2890275474Smav default: 2891275474Smav ctl_set_invalid_opcode(&io->scsiio); 2892275474Smav ctl_config_read_done(io); 2893275474Smav retval = CTL_RETVAL_COMPLETE; 2894275474Smav break; 2895275474Smav } 2896275474Smav 2897275474Smav return (retval); 2898229997Sken} 2899229997Sken 2900229997Skenstatic int 2901229997Skenctl_be_block_lun_info(void *be_lun, struct sbuf *sb) 2902229997Sken{ 2903229997Sken struct ctl_be_block_lun *lun; 2904229997Sken int retval; 2905229997Sken 2906229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2907229997Sken retval = 0; 2908229997Sken 2909268283Smav retval = sbuf_printf(sb, "\t<num_threads>"); 2910229997Sken 2911229997Sken if (retval != 0) 2912229997Sken goto bailout; 2913229997Sken 2914229997Sken retval = sbuf_printf(sb, "%d", lun->num_threads); 2915229997Sken 2916229997Sken if (retval != 0) 2917229997Sken goto bailout; 2918229997Sken 2919268283Smav retval = sbuf_printf(sb, "</num_threads>\n"); 2920229997Sken 2921229997Skenbailout: 2922229997Sken 2923229997Sken return (retval); 2924229997Sken} 2925229997Sken 2926274154Smavstatic uint64_t 2927274154Smavctl_be_block_lun_attr(void *be_lun, const char *attrname) 2928274154Smav{ 2929274154Smav struct ctl_be_block_lun *lun = (struct ctl_be_block_lun *)be_lun; 2930274154Smav 2931274154Smav if (lun->getattr == NULL) 2932274154Smav return (UINT64_MAX); 2933274154Smav return (lun->getattr(lun, attrname)); 2934274154Smav} 2935274154Smav 2936229997Skenint 2937229997Skenctl_be_block_init(void) 2938229997Sken{ 2939229997Sken struct ctl_be_block_softc *softc; 2940229997Sken int retval; 2941229997Sken 2942229997Sken softc = &backend_block_softc; 2943229997Sken retval = 0; 2944229997Sken 2945267877Smav mtx_init(&softc->lock, "ctlblock", NULL, MTX_DEF); 2946264020Strasz beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io), 2947264020Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 2948229997Sken STAILQ_INIT(&softc->disk_list); 2949229997Sken STAILQ_INIT(&softc->lun_list); 2950229997Sken 2951229997Sken return (retval); 2952229997Sken} 2953