ctl_backend_block.c revision 264296
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 264296 2014-04-09 10:44:09Z 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> 71229997Sken#include <sys/proc.h> 72229997Sken#include <sys/pcpu.h> 73229997Sken#include <sys/module.h> 74229997Sken#include <sys/sdt.h> 75229997Sken#include <sys/devicestat.h> 76229997Sken#include <sys/sysctl.h> 77229997Sken 78229997Sken#include <geom/geom.h> 79229997Sken 80229997Sken#include <cam/cam.h> 81229997Sken#include <cam/scsi/scsi_all.h> 82229997Sken#include <cam/scsi/scsi_da.h> 83229997Sken#include <cam/ctl/ctl_io.h> 84229997Sken#include <cam/ctl/ctl.h> 85229997Sken#include <cam/ctl/ctl_backend.h> 86229997Sken#include <cam/ctl/ctl_frontend_internal.h> 87229997Sken#include <cam/ctl/ctl_ioctl.h> 88229997Sken#include <cam/ctl/ctl_scsi_all.h> 89229997Sken#include <cam/ctl/ctl_error.h> 90229997Sken 91229997Sken/* 92229997Sken * The idea here is that we'll allocate enough S/G space to hold a 16MB 93229997Sken * I/O. If we get an I/O larger than that, we'll reject it. 94229997Sken */ 95229997Sken#define CTLBLK_MAX_IO_SIZE (16 * 1024 * 1024) 96229997Sken#define CTLBLK_MAX_SEGS (CTLBLK_MAX_IO_SIZE / MAXPHYS) + 1 97229997Sken 98229997Sken#ifdef CTLBLK_DEBUG 99229997Sken#define DPRINTF(fmt, args...) \ 100229997Sken printf("cbb(%s:%d): " fmt, __FUNCTION__, __LINE__, ##args) 101229997Sken#else 102229997Sken#define DPRINTF(fmt, args...) do {} while(0) 103229997Sken#endif 104229997Sken 105229997SkenSDT_PROVIDER_DEFINE(cbb); 106229997Sken 107229997Skentypedef enum { 108229997Sken CTL_BE_BLOCK_LUN_UNCONFIGURED = 0x01, 109229997Sken CTL_BE_BLOCK_LUN_CONFIG_ERR = 0x02, 110229997Sken CTL_BE_BLOCK_LUN_WAITING = 0x04, 111229997Sken CTL_BE_BLOCK_LUN_MULTI_THREAD = 0x08 112229997Sken} ctl_be_block_lun_flags; 113229997Sken 114229997Skentypedef enum { 115229997Sken CTL_BE_BLOCK_NONE, 116229997Sken CTL_BE_BLOCK_DEV, 117229997Sken CTL_BE_BLOCK_FILE 118229997Sken} ctl_be_block_type; 119229997Sken 120229997Skenstruct ctl_be_block_devdata { 121229997Sken struct cdev *cdev; 122229997Sken struct cdevsw *csw; 123229997Sken int dev_ref; 124229997Sken}; 125229997Sken 126229997Skenstruct ctl_be_block_filedata { 127229997Sken struct ucred *cred; 128229997Sken}; 129229997Sken 130229997Skenunion ctl_be_block_bedata { 131229997Sken struct ctl_be_block_devdata dev; 132229997Sken struct ctl_be_block_filedata file; 133229997Sken}; 134229997Sken 135229997Skenstruct ctl_be_block_io; 136229997Skenstruct ctl_be_block_lun; 137229997Sken 138229997Skentypedef void (*cbb_dispatch_t)(struct ctl_be_block_lun *be_lun, 139229997Sken struct ctl_be_block_io *beio); 140229997Sken 141229997Sken/* 142229997Sken * Backend LUN structure. There is a 1:1 mapping between a block device 143229997Sken * and a backend block LUN, and between a backend block LUN and a CTL LUN. 144229997Sken */ 145229997Skenstruct ctl_be_block_lun { 146229997Sken struct ctl_block_disk *disk; 147229997Sken char lunname[32]; 148229997Sken char *dev_path; 149229997Sken ctl_be_block_type dev_type; 150229997Sken struct vnode *vn; 151229997Sken union ctl_be_block_bedata backend; 152229997Sken cbb_dispatch_t dispatch; 153229997Sken cbb_dispatch_t lun_flush; 154264274Smav cbb_dispatch_t unmap; 155229997Sken struct mtx lock; 156229997Sken uma_zone_t lun_zone; 157229997Sken uint64_t size_blocks; 158229997Sken uint64_t size_bytes; 159229997Sken uint32_t blocksize; 160229997Sken int blocksize_shift; 161264191Smav uint16_t pblockexp; 162264191Smav uint16_t pblockoff; 163229997Sken struct ctl_be_block_softc *softc; 164229997Sken struct devstat *disk_stats; 165229997Sken ctl_be_block_lun_flags flags; 166229997Sken STAILQ_ENTRY(ctl_be_block_lun) links; 167229997Sken struct ctl_be_lun ctl_be_lun; 168229997Sken struct taskqueue *io_taskqueue; 169229997Sken struct task io_task; 170229997Sken int num_threads; 171229997Sken STAILQ_HEAD(, ctl_io_hdr) input_queue; 172229997Sken STAILQ_HEAD(, ctl_io_hdr) config_write_queue; 173229997Sken STAILQ_HEAD(, ctl_io_hdr) datamove_queue; 174229997Sken}; 175229997Sken 176229997Sken/* 177229997Sken * Overall softc structure for the block backend module. 178229997Sken */ 179229997Skenstruct ctl_be_block_softc { 180229997Sken struct mtx lock; 181229997Sken int num_disks; 182229997Sken STAILQ_HEAD(, ctl_block_disk) disk_list; 183229997Sken int num_luns; 184229997Sken STAILQ_HEAD(, ctl_be_block_lun) lun_list; 185229997Sken}; 186229997Sken 187229997Skenstatic struct ctl_be_block_softc backend_block_softc; 188229997Sken 189229997Sken/* 190229997Sken * Per-I/O information. 191229997Sken */ 192229997Skenstruct ctl_be_block_io { 193229997Sken union ctl_io *io; 194229997Sken struct ctl_sg_entry sg_segs[CTLBLK_MAX_SEGS]; 195229997Sken struct iovec xiovecs[CTLBLK_MAX_SEGS]; 196229997Sken int bio_cmd; 197229997Sken int bio_flags; 198229997Sken int num_segs; 199229997Sken int num_bios_sent; 200229997Sken int num_bios_done; 201229997Sken int send_complete; 202229997Sken int num_errors; 203229997Sken struct bintime ds_t0; 204229997Sken devstat_tag_type ds_tag_type; 205229997Sken devstat_trans_flags ds_trans_type; 206229997Sken uint64_t io_len; 207229997Sken uint64_t io_offset; 208229997Sken struct ctl_be_block_softc *softc; 209229997Sken struct ctl_be_block_lun *lun; 210264274Smav void (*beio_cont)(struct ctl_be_block_io *beio); /* to continue processing */ 211229997Sken}; 212229997Sken 213229997Skenstatic int cbb_num_threads = 14; 214229997SkenTUNABLE_INT("kern.cam.ctl.block.num_threads", &cbb_num_threads); 215229997SkenSYSCTL_NODE(_kern_cam_ctl, OID_AUTO, block, CTLFLAG_RD, 0, 216229997Sken "CAM Target Layer Block Backend"); 217229997SkenSYSCTL_INT(_kern_cam_ctl_block, OID_AUTO, num_threads, CTLFLAG_RW, 218229997Sken &cbb_num_threads, 0, "Number of threads per backing file"); 219229997Sken 220229997Skenstatic struct ctl_be_block_io *ctl_alloc_beio(struct ctl_be_block_softc *softc); 221229997Skenstatic void ctl_free_beio(struct ctl_be_block_io *beio); 222229997Skenstatic void ctl_complete_beio(struct ctl_be_block_io *beio); 223229997Skenstatic int ctl_be_block_move_done(union ctl_io *io); 224229997Skenstatic void ctl_be_block_biodone(struct bio *bio); 225229997Skenstatic void ctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 226229997Sken struct ctl_be_block_io *beio); 227229997Skenstatic void ctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 228229997Sken struct ctl_be_block_io *beio); 229229997Skenstatic void ctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 230229997Sken struct ctl_be_block_io *beio); 231264274Smavstatic void ctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 232264274Smav struct ctl_be_block_io *beio); 233229997Skenstatic void ctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 234229997Sken struct ctl_be_block_io *beio); 235229997Skenstatic void ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 236229997Sken union ctl_io *io); 237229997Skenstatic void ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 238229997Sken union ctl_io *io); 239229997Skenstatic void ctl_be_block_worker(void *context, int pending); 240229997Skenstatic int ctl_be_block_submit(union ctl_io *io); 241229997Skenstatic int ctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 242229997Sken int flag, struct thread *td); 243229997Skenstatic int ctl_be_block_open_file(struct ctl_be_block_lun *be_lun, 244229997Sken struct ctl_lun_req *req); 245229997Skenstatic int ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, 246229997Sken struct ctl_lun_req *req); 247229997Skenstatic int ctl_be_block_close(struct ctl_be_block_lun *be_lun); 248229997Skenstatic int ctl_be_block_open(struct ctl_be_block_softc *softc, 249229997Sken struct ctl_be_block_lun *be_lun, 250229997Sken struct ctl_lun_req *req); 251229997Skenstatic int ctl_be_block_create(struct ctl_be_block_softc *softc, 252229997Sken struct ctl_lun_req *req); 253229997Skenstatic int ctl_be_block_rm(struct ctl_be_block_softc *softc, 254229997Sken struct ctl_lun_req *req); 255232604Straszstatic int ctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 256232604Strasz struct ctl_lun_req *req); 257232604Straszstatic int ctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 258232604Strasz struct ctl_lun_req *req); 259232604Straszstatic int ctl_be_block_modify(struct ctl_be_block_softc *softc, 260232604Strasz struct ctl_lun_req *req); 261229997Skenstatic void ctl_be_block_lun_shutdown(void *be_lun); 262229997Skenstatic void ctl_be_block_lun_config_status(void *be_lun, 263229997Sken ctl_lun_config_status status); 264229997Skenstatic int ctl_be_block_config_write(union ctl_io *io); 265229997Skenstatic int ctl_be_block_config_read(union ctl_io *io); 266229997Skenstatic int ctl_be_block_lun_info(void *be_lun, struct sbuf *sb); 267229997Skenint ctl_be_block_init(void); 268229997Sken 269229997Skenstatic struct ctl_backend_driver ctl_be_block_driver = 270229997Sken{ 271230334Sken .name = "block", 272230334Sken .flags = CTL_BE_FLAG_HAS_CONFIG, 273230334Sken .init = ctl_be_block_init, 274230334Sken .data_submit = ctl_be_block_submit, 275230334Sken .data_move_done = ctl_be_block_move_done, 276230334Sken .config_read = ctl_be_block_config_read, 277230334Sken .config_write = ctl_be_block_config_write, 278230334Sken .ioctl = ctl_be_block_ioctl, 279230334Sken .lun_info = ctl_be_block_lun_info 280229997Sken}; 281229997Sken 282229997SkenMALLOC_DEFINE(M_CTLBLK, "ctlblk", "Memory used for CTL block backend"); 283229997SkenCTL_BACKEND_DECLARE(cbb, ctl_be_block_driver); 284229997Sken 285264020Straszstatic uma_zone_t beio_zone; 286264020Strasz 287229997Skenstatic struct ctl_be_block_io * 288229997Skenctl_alloc_beio(struct ctl_be_block_softc *softc) 289229997Sken{ 290229997Sken struct ctl_be_block_io *beio; 291229997Sken 292264020Strasz beio = uma_zalloc(beio_zone, M_WAITOK | M_ZERO); 293264020Strasz beio->softc = softc; 294229997Sken return (beio); 295229997Sken} 296229997Sken 297229997Skenstatic void 298229997Skenctl_free_beio(struct ctl_be_block_io *beio) 299229997Sken{ 300229997Sken int duplicate_free; 301229997Sken int i; 302229997Sken 303229997Sken duplicate_free = 0; 304229997Sken 305229997Sken for (i = 0; i < beio->num_segs; i++) { 306229997Sken if (beio->sg_segs[i].addr == NULL) 307229997Sken duplicate_free++; 308229997Sken 309229997Sken uma_zfree(beio->lun->lun_zone, beio->sg_segs[i].addr); 310229997Sken beio->sg_segs[i].addr = NULL; 311229997Sken } 312229997Sken 313229997Sken if (duplicate_free > 0) { 314229997Sken printf("%s: %d duplicate frees out of %d segments\n", __func__, 315229997Sken duplicate_free, beio->num_segs); 316229997Sken } 317229997Sken 318264020Strasz uma_zfree(beio_zone, beio); 319229997Sken} 320229997Sken 321229997Skenstatic void 322229997Skenctl_complete_beio(struct ctl_be_block_io *beio) 323229997Sken{ 324229997Sken union ctl_io *io; 325229997Sken int io_len; 326229997Sken 327229997Sken io = beio->io; 328229997Sken 329229997Sken if ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS) 330229997Sken io_len = beio->io_len; 331229997Sken else 332229997Sken io_len = 0; 333229997Sken 334229997Sken devstat_end_transaction(beio->lun->disk_stats, 335229997Sken /*bytes*/ io_len, 336229997Sken beio->ds_tag_type, 337229997Sken beio->ds_trans_type, 338229997Sken /*now*/ NULL, 339229997Sken /*then*/&beio->ds_t0); 340229997Sken 341264274Smav if (beio->beio_cont != NULL) { 342264274Smav beio->beio_cont(beio); 343264274Smav } else { 344264274Smav ctl_free_beio(beio); 345264274Smav ctl_done(io); 346264274Smav } 347229997Sken} 348229997Sken 349229997Skenstatic int 350229997Skenctl_be_block_move_done(union ctl_io *io) 351229997Sken{ 352229997Sken struct ctl_be_block_io *beio; 353229997Sken struct ctl_be_block_lun *be_lun; 354229997Sken#ifdef CTL_TIME_IO 355229997Sken struct bintime cur_bt; 356229997Sken#endif 357229997Sken 358229997Sken beio = (struct ctl_be_block_io *) 359229997Sken io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr; 360229997Sken 361229997Sken be_lun = beio->lun; 362229997Sken 363229997Sken DPRINTF("entered\n"); 364229997Sken 365229997Sken#ifdef CTL_TIME_IO 366229997Sken getbintime(&cur_bt); 367229997Sken bintime_sub(&cur_bt, &io->io_hdr.dma_start_bt); 368229997Sken bintime_add(&io->io_hdr.dma_bt, &cur_bt); 369229997Sken io->io_hdr.num_dmas++; 370229997Sken#endif 371229997Sken 372229997Sken /* 373229997Sken * We set status at this point for read commands, and write 374229997Sken * commands with errors. 375229997Sken */ 376229997Sken if ((beio->bio_cmd == BIO_READ) 377229997Sken && (io->io_hdr.port_status == 0) 378229997Sken && ((io->io_hdr.flags & CTL_FLAG_ABORT) == 0) 379229997Sken && ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) 380229997Sken ctl_set_success(&io->scsiio); 381229997Sken else if ((io->io_hdr.port_status != 0) 382229997Sken && ((io->io_hdr.flags & CTL_FLAG_ABORT) == 0) 383229997Sken && ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) { 384229997Sken /* 385229997Sken * For hardware error sense keys, the sense key 386229997Sken * specific value is defined to be a retry count, 387229997Sken * but we use it to pass back an internal FETD 388229997Sken * error code. XXX KDM Hopefully the FETD is only 389229997Sken * using 16 bits for an error code, since that's 390229997Sken * all the space we have in the sks field. 391229997Sken */ 392229997Sken ctl_set_internal_failure(&io->scsiio, 393229997Sken /*sks_valid*/ 1, 394229997Sken /*retry_count*/ 395229997Sken io->io_hdr.port_status); 396229997Sken } 397229997Sken 398229997Sken /* 399229997Sken * If this is a read, or a write with errors, it is done. 400229997Sken */ 401229997Sken if ((beio->bio_cmd == BIO_READ) 402229997Sken || ((io->io_hdr.flags & CTL_FLAG_ABORT) != 0) 403229997Sken || ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)) { 404229997Sken ctl_complete_beio(beio); 405229997Sken return (0); 406229997Sken } 407229997Sken 408229997Sken /* 409229997Sken * At this point, we have a write and the DMA completed 410229997Sken * successfully. We now have to queue it to the task queue to 411229997Sken * execute the backend I/O. That is because we do blocking 412229997Sken * memory allocations, and in the file backing case, blocking I/O. 413229997Sken * This move done routine is generally called in the SIM's 414229997Sken * interrupt context, and therefore we cannot block. 415229997Sken */ 416229997Sken mtx_lock(&be_lun->lock); 417229997Sken /* 418229997Sken * XXX KDM make sure that links is okay to use at this point. 419229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 420229997Sken * or deal with resource allocation here. 421229997Sken */ 422229997Sken STAILQ_INSERT_TAIL(&be_lun->datamove_queue, &io->io_hdr, links); 423229997Sken mtx_unlock(&be_lun->lock); 424229997Sken 425229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 426229997Sken 427229997Sken return (0); 428229997Sken} 429229997Sken 430229997Skenstatic void 431229997Skenctl_be_block_biodone(struct bio *bio) 432229997Sken{ 433229997Sken struct ctl_be_block_io *beio; 434229997Sken struct ctl_be_block_lun *be_lun; 435229997Sken union ctl_io *io; 436261538Smav int error; 437229997Sken 438229997Sken beio = bio->bio_caller1; 439229997Sken be_lun = beio->lun; 440229997Sken io = beio->io; 441229997Sken 442229997Sken DPRINTF("entered\n"); 443229997Sken 444261538Smav error = bio->bio_error; 445229997Sken mtx_lock(&be_lun->lock); 446261538Smav if (error != 0) 447229997Sken beio->num_errors++; 448229997Sken 449229997Sken beio->num_bios_done++; 450229997Sken 451229997Sken /* 452229997Sken * XXX KDM will this cause WITNESS to complain? Holding a lock 453229997Sken * during the free might cause it to complain. 454229997Sken */ 455229997Sken g_destroy_bio(bio); 456229997Sken 457229997Sken /* 458229997Sken * If the send complete bit isn't set, or we aren't the last I/O to 459229997Sken * complete, then we're done. 460229997Sken */ 461229997Sken if ((beio->send_complete == 0) 462229997Sken || (beio->num_bios_done < beio->num_bios_sent)) { 463229997Sken mtx_unlock(&be_lun->lock); 464229997Sken return; 465229997Sken } 466229997Sken 467229997Sken /* 468229997Sken * At this point, we've verified that we are the last I/O to 469229997Sken * complete, so it's safe to drop the lock. 470229997Sken */ 471229997Sken mtx_unlock(&be_lun->lock); 472229997Sken 473229997Sken /* 474229997Sken * If there are any errors from the backing device, we fail the 475229997Sken * entire I/O with a medium error. 476229997Sken */ 477229997Sken if (beio->num_errors > 0) { 478261538Smav if (error == EOPNOTSUPP) { 479261538Smav ctl_set_invalid_opcode(&io->scsiio); 480261538Smav } else if (beio->bio_cmd == BIO_FLUSH) { 481229997Sken /* XXX KDM is there is a better error here? */ 482229997Sken ctl_set_internal_failure(&io->scsiio, 483229997Sken /*sks_valid*/ 1, 484229997Sken /*retry_count*/ 0xbad2); 485229997Sken } else 486229997Sken ctl_set_medium_error(&io->scsiio); 487229997Sken ctl_complete_beio(beio); 488229997Sken return; 489229997Sken } 490229997Sken 491229997Sken /* 492264274Smav * If this is a write, a flush or a delete, we're all done. 493229997Sken * If this is a read, we can now send the data to the user. 494229997Sken */ 495229997Sken if ((beio->bio_cmd == BIO_WRITE) 496264274Smav || (beio->bio_cmd == BIO_FLUSH) 497264274Smav || (beio->bio_cmd == BIO_DELETE)) { 498229997Sken ctl_set_success(&io->scsiio); 499229997Sken ctl_complete_beio(beio); 500229997Sken } else { 501229997Sken io->scsiio.be_move_done = ctl_be_block_move_done; 502229997Sken io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 503229997Sken io->scsiio.kern_data_len = beio->io_len; 504229997Sken io->scsiio.kern_total_len = beio->io_len; 505229997Sken io->scsiio.kern_rel_offset = 0; 506229997Sken io->scsiio.kern_data_resid = 0; 507229997Sken io->scsiio.kern_sg_entries = beio->num_segs; 508229997Sken io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 509229997Sken#ifdef CTL_TIME_IO 510229997Sken getbintime(&io->io_hdr.dma_start_bt); 511229997Sken#endif 512229997Sken ctl_datamove(io); 513229997Sken } 514229997Sken} 515229997Sken 516229997Skenstatic void 517229997Skenctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 518229997Sken struct ctl_be_block_io *beio) 519229997Sken{ 520229997Sken union ctl_io *io; 521229997Sken struct mount *mountpoint; 522241896Skib int error, lock_flags; 523229997Sken 524229997Sken DPRINTF("entered\n"); 525229997Sken 526229997Sken io = beio->io; 527229997Sken 528229997Sken (void) vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 529229997Sken 530229997Sken if (MNT_SHARED_WRITES(mountpoint) 531229997Sken || ((mountpoint == NULL) 532229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 533229997Sken lock_flags = LK_SHARED; 534229997Sken else 535229997Sken lock_flags = LK_EXCLUSIVE; 536229997Sken 537229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 538229997Sken 539229997Sken binuptime(&beio->ds_t0); 540229997Sken devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 541229997Sken 542229997Sken error = VOP_FSYNC(be_lun->vn, MNT_WAIT, curthread); 543229997Sken VOP_UNLOCK(be_lun->vn, 0); 544229997Sken 545229997Sken vn_finished_write(mountpoint); 546229997Sken 547229997Sken if (error == 0) 548229997Sken ctl_set_success(&io->scsiio); 549229997Sken else { 550229997Sken /* XXX KDM is there is a better error here? */ 551229997Sken ctl_set_internal_failure(&io->scsiio, 552229997Sken /*sks_valid*/ 1, 553229997Sken /*retry_count*/ 0xbad1); 554229997Sken } 555229997Sken 556229997Sken ctl_complete_beio(beio); 557229997Sken} 558229997Sken 559258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_start, "uint64_t"); 560258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_start, "uint64_t"); 561258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_done,"uint64_t"); 562258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_done, "uint64_t"); 563229997Sken 564229997Skenstatic void 565229997Skenctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 566229997Sken struct ctl_be_block_io *beio) 567229997Sken{ 568229997Sken struct ctl_be_block_filedata *file_data; 569229997Sken union ctl_io *io; 570229997Sken struct uio xuio; 571229997Sken struct iovec *xiovec; 572241896Skib int flags; 573229997Sken int error, i; 574229997Sken 575229997Sken DPRINTF("entered\n"); 576229997Sken 577229997Sken file_data = &be_lun->backend.file; 578229997Sken io = beio->io; 579229997Sken flags = beio->bio_flags; 580229997Sken 581229997Sken if (beio->bio_cmd == BIO_READ) { 582229997Sken SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 583229997Sken } else { 584229997Sken SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 585229997Sken } 586229997Sken 587229997Sken bzero(&xuio, sizeof(xuio)); 588229997Sken if (beio->bio_cmd == BIO_READ) 589229997Sken xuio.uio_rw = UIO_READ; 590229997Sken else 591229997Sken xuio.uio_rw = UIO_WRITE; 592229997Sken 593229997Sken xuio.uio_offset = beio->io_offset; 594229997Sken xuio.uio_resid = beio->io_len; 595229997Sken xuio.uio_segflg = UIO_SYSSPACE; 596229997Sken xuio.uio_iov = beio->xiovecs; 597229997Sken xuio.uio_iovcnt = beio->num_segs; 598229997Sken xuio.uio_td = curthread; 599229997Sken 600229997Sken for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 601229997Sken xiovec->iov_base = beio->sg_segs[i].addr; 602229997Sken xiovec->iov_len = beio->sg_segs[i].len; 603229997Sken } 604229997Sken 605229997Sken if (beio->bio_cmd == BIO_READ) { 606229997Sken vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 607229997Sken 608229997Sken binuptime(&beio->ds_t0); 609229997Sken devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 610229997Sken 611229997Sken /* 612229997Sken * UFS pays attention to IO_DIRECT for reads. If the 613229997Sken * DIRECTIO option is configured into the kernel, it calls 614229997Sken * ffs_rawread(). But that only works for single-segment 615229997Sken * uios with user space addresses. In our case, with a 616229997Sken * kernel uio, it still reads into the buffer cache, but it 617229997Sken * will just try to release the buffer from the cache later 618229997Sken * on in ffs_read(). 619229997Sken * 620229997Sken * ZFS does not pay attention to IO_DIRECT for reads. 621229997Sken * 622229997Sken * UFS does not pay attention to IO_SYNC for reads. 623229997Sken * 624229997Sken * ZFS pays attention to IO_SYNC (which translates into the 625229997Sken * Solaris define FRSYNC for zfs_read()) for reads. It 626229997Sken * attempts to sync the file before reading. 627229997Sken * 628229997Sken * So, to attempt to provide some barrier semantics in the 629229997Sken * BIO_ORDERED case, set both IO_DIRECT and IO_SYNC. 630229997Sken */ 631229997Sken error = VOP_READ(be_lun->vn, &xuio, (flags & BIO_ORDERED) ? 632229997Sken (IO_DIRECT|IO_SYNC) : 0, file_data->cred); 633229997Sken 634229997Sken VOP_UNLOCK(be_lun->vn, 0); 635229997Sken } else { 636229997Sken struct mount *mountpoint; 637229997Sken int lock_flags; 638229997Sken 639229997Sken (void)vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 640229997Sken 641229997Sken if (MNT_SHARED_WRITES(mountpoint) 642229997Sken || ((mountpoint == NULL) 643229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 644229997Sken lock_flags = LK_SHARED; 645229997Sken else 646229997Sken lock_flags = LK_EXCLUSIVE; 647229997Sken 648229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 649229997Sken 650229997Sken binuptime(&beio->ds_t0); 651229997Sken devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 652229997Sken 653229997Sken /* 654229997Sken * UFS pays attention to IO_DIRECT for writes. The write 655229997Sken * is done asynchronously. (Normally the write would just 656229997Sken * get put into cache. 657229997Sken * 658229997Sken * UFS pays attention to IO_SYNC for writes. It will 659229997Sken * attempt to write the buffer out synchronously if that 660229997Sken * flag is set. 661229997Sken * 662229997Sken * ZFS does not pay attention to IO_DIRECT for writes. 663229997Sken * 664229997Sken * ZFS pays attention to IO_SYNC (a.k.a. FSYNC or FRSYNC) 665229997Sken * for writes. It will flush the transaction from the 666229997Sken * cache before returning. 667229997Sken * 668229997Sken * So if we've got the BIO_ORDERED flag set, we want 669229997Sken * IO_SYNC in either the UFS or ZFS case. 670229997Sken */ 671229997Sken error = VOP_WRITE(be_lun->vn, &xuio, (flags & BIO_ORDERED) ? 672229997Sken IO_SYNC : 0, file_data->cred); 673229997Sken VOP_UNLOCK(be_lun->vn, 0); 674229997Sken 675229997Sken vn_finished_write(mountpoint); 676229997Sken } 677229997Sken 678229997Sken /* 679229997Sken * If we got an error, set the sense data to "MEDIUM ERROR" and 680229997Sken * return the I/O to the user. 681229997Sken */ 682229997Sken if (error != 0) { 683229997Sken char path_str[32]; 684229997Sken 685229997Sken ctl_scsi_path_string(io, path_str, sizeof(path_str)); 686229997Sken /* 687229997Sken * XXX KDM ZFS returns ENOSPC when the underlying 688229997Sken * filesystem fills up. What kind of SCSI error should we 689229997Sken * return for that? 690229997Sken */ 691229997Sken printf("%s%s command returned errno %d\n", path_str, 692229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", error); 693229997Sken ctl_set_medium_error(&io->scsiio); 694229997Sken ctl_complete_beio(beio); 695229997Sken return; 696229997Sken } 697229997Sken 698229997Sken /* 699229997Sken * If this is a write, we're all done. 700229997Sken * If this is a read, we can now send the data to the user. 701229997Sken */ 702229997Sken if (beio->bio_cmd == BIO_WRITE) { 703229997Sken ctl_set_success(&io->scsiio); 704229997Sken SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 705229997Sken ctl_complete_beio(beio); 706229997Sken } else { 707229997Sken SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 708229997Sken io->scsiio.be_move_done = ctl_be_block_move_done; 709229997Sken io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 710229997Sken io->scsiio.kern_data_len = beio->io_len; 711229997Sken io->scsiio.kern_total_len = beio->io_len; 712229997Sken io->scsiio.kern_rel_offset = 0; 713229997Sken io->scsiio.kern_data_resid = 0; 714229997Sken io->scsiio.kern_sg_entries = beio->num_segs; 715229997Sken io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 716229997Sken#ifdef CTL_TIME_IO 717229997Sken getbintime(&io->io_hdr.dma_start_bt); 718229997Sken#endif 719229997Sken ctl_datamove(io); 720229997Sken } 721229997Sken} 722229997Sken 723229997Skenstatic void 724229997Skenctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 725229997Sken struct ctl_be_block_io *beio) 726229997Sken{ 727229997Sken struct bio *bio; 728229997Sken union ctl_io *io; 729229997Sken struct ctl_be_block_devdata *dev_data; 730229997Sken 731229997Sken dev_data = &be_lun->backend.dev; 732229997Sken io = beio->io; 733229997Sken 734229997Sken DPRINTF("entered\n"); 735229997Sken 736229997Sken /* This can't fail, it's a blocking allocation. */ 737229997Sken bio = g_alloc_bio(); 738229997Sken 739229997Sken bio->bio_cmd = BIO_FLUSH; 740229997Sken bio->bio_flags |= BIO_ORDERED; 741229997Sken bio->bio_dev = dev_data->cdev; 742229997Sken bio->bio_offset = 0; 743229997Sken bio->bio_data = 0; 744229997Sken bio->bio_done = ctl_be_block_biodone; 745229997Sken bio->bio_caller1 = beio; 746229997Sken bio->bio_pblkno = 0; 747229997Sken 748229997Sken /* 749229997Sken * We don't need to acquire the LUN lock here, because we are only 750229997Sken * sending one bio, and so there is no other context to synchronize 751229997Sken * with. 752229997Sken */ 753229997Sken beio->num_bios_sent = 1; 754229997Sken beio->send_complete = 1; 755229997Sken 756229997Sken binuptime(&beio->ds_t0); 757229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 758229997Sken 759229997Sken (*dev_data->csw->d_strategy)(bio); 760229997Sken} 761229997Sken 762229997Skenstatic void 763264274Smavctl_be_block_unmap_dev_range(struct ctl_be_block_lun *be_lun, 764264274Smav struct ctl_be_block_io *beio, 765264274Smav uint64_t off, uint64_t len, int last) 766264274Smav{ 767264274Smav struct bio *bio; 768264274Smav struct ctl_be_block_devdata *dev_data; 769264296Smav uint64_t maxlen; 770264274Smav 771264274Smav dev_data = &be_lun->backend.dev; 772264296Smav maxlen = LONG_MAX - (LONG_MAX % be_lun->blocksize); 773264274Smav while (len > 0) { 774264274Smav bio = g_alloc_bio(); 775264274Smav bio->bio_cmd = BIO_DELETE; 776264274Smav bio->bio_flags |= beio->bio_flags; 777264274Smav bio->bio_dev = dev_data->cdev; 778264274Smav bio->bio_offset = off; 779264296Smav bio->bio_length = MIN(len, maxlen); 780264274Smav bio->bio_data = 0; 781264274Smav bio->bio_done = ctl_be_block_biodone; 782264274Smav bio->bio_caller1 = beio; 783264296Smav bio->bio_pblkno = off / be_lun->blocksize; 784264274Smav 785264274Smav off += bio->bio_length; 786264274Smav len -= bio->bio_length; 787264274Smav 788264274Smav mtx_lock(&be_lun->lock); 789264274Smav beio->num_bios_sent++; 790264274Smav if (last && len == 0) 791264274Smav beio->send_complete = 1; 792264274Smav mtx_unlock(&be_lun->lock); 793264274Smav 794264274Smav (*dev_data->csw->d_strategy)(bio); 795264274Smav } 796264274Smav} 797264274Smav 798264274Smavstatic void 799264274Smavctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 800264274Smav struct ctl_be_block_io *beio) 801264274Smav{ 802264274Smav union ctl_io *io; 803264274Smav struct ctl_be_block_devdata *dev_data; 804264274Smav struct ctl_ptr_len_flags ptrlen; 805264274Smav struct scsi_unmap_desc *buf, *end; 806264274Smav uint64_t len; 807264274Smav 808264274Smav dev_data = &be_lun->backend.dev; 809264274Smav io = beio->io; 810264274Smav 811264274Smav DPRINTF("entered\n"); 812264274Smav 813264274Smav binuptime(&beio->ds_t0); 814264274Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 815264274Smav 816264274Smav if (beio->io_offset == -1) { 817264274Smav beio->io_len = 0; 818264274Smav memcpy(&ptrlen, io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, 819264274Smav sizeof(ptrlen)); 820264274Smav buf = (struct scsi_unmap_desc *)ptrlen.ptr; 821264274Smav end = buf + ptrlen.len / sizeof(*buf); 822264274Smav for (; buf < end; buf++) { 823264274Smav len = (uint64_t)scsi_4btoul(buf->length) * 824264274Smav be_lun->blocksize; 825264274Smav beio->io_len += len; 826264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 827264274Smav scsi_8btou64(buf->lba) * be_lun->blocksize, len, 828264283Smav (end - buf < 2) ? TRUE : FALSE); 829264274Smav } 830264274Smav } else 831264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 832264274Smav beio->io_offset, beio->io_len, TRUE); 833264274Smav} 834264274Smav 835264274Smavstatic void 836229997Skenctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 837229997Sken struct ctl_be_block_io *beio) 838229997Sken{ 839229997Sken int i; 840229997Sken struct bio *bio; 841229997Sken struct ctl_be_block_devdata *dev_data; 842229997Sken off_t cur_offset; 843229997Sken int max_iosize; 844229997Sken 845229997Sken DPRINTF("entered\n"); 846229997Sken 847229997Sken dev_data = &be_lun->backend.dev; 848229997Sken 849229997Sken /* 850229997Sken * We have to limit our I/O size to the maximum supported by the 851229997Sken * backend device. Hopefully it is MAXPHYS. If the driver doesn't 852229997Sken * set it properly, use DFLTPHYS. 853229997Sken */ 854229997Sken max_iosize = dev_data->cdev->si_iosize_max; 855229997Sken if (max_iosize < PAGE_SIZE) 856229997Sken max_iosize = DFLTPHYS; 857229997Sken 858229997Sken cur_offset = beio->io_offset; 859229997Sken 860229997Sken /* 861229997Sken * XXX KDM need to accurately reflect the number of I/Os outstanding 862229997Sken * to a device. 863229997Sken */ 864229997Sken binuptime(&beio->ds_t0); 865229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 866229997Sken 867229997Sken for (i = 0; i < beio->num_segs; i++) { 868229997Sken size_t cur_size; 869229997Sken uint8_t *cur_ptr; 870229997Sken 871229997Sken cur_size = beio->sg_segs[i].len; 872229997Sken cur_ptr = beio->sg_segs[i].addr; 873229997Sken 874229997Sken while (cur_size > 0) { 875229997Sken /* This can't fail, it's a blocking allocation. */ 876229997Sken bio = g_alloc_bio(); 877229997Sken 878229997Sken KASSERT(bio != NULL, ("g_alloc_bio() failed!\n")); 879229997Sken 880229997Sken bio->bio_cmd = beio->bio_cmd; 881229997Sken bio->bio_flags |= beio->bio_flags; 882229997Sken bio->bio_dev = dev_data->cdev; 883229997Sken bio->bio_caller1 = beio; 884229997Sken bio->bio_length = min(cur_size, max_iosize); 885229997Sken bio->bio_offset = cur_offset; 886229997Sken bio->bio_data = cur_ptr; 887229997Sken bio->bio_done = ctl_be_block_biodone; 888229997Sken bio->bio_pblkno = cur_offset / be_lun->blocksize; 889229997Sken 890229997Sken cur_offset += bio->bio_length; 891229997Sken cur_ptr += bio->bio_length; 892229997Sken cur_size -= bio->bio_length; 893229997Sken 894229997Sken /* 895229997Sken * Make sure we set the complete bit just before we 896229997Sken * issue the last bio so we don't wind up with a 897229997Sken * race. 898229997Sken * 899229997Sken * Use the LUN mutex here instead of a combination 900229997Sken * of atomic variables for simplicity. 901229997Sken * 902229997Sken * XXX KDM we could have a per-IO lock, but that 903229997Sken * would cause additional per-IO setup and teardown 904229997Sken * overhead. Hopefully there won't be too much 905229997Sken * contention on the LUN lock. 906229997Sken */ 907229997Sken mtx_lock(&be_lun->lock); 908229997Sken 909229997Sken beio->num_bios_sent++; 910229997Sken 911229997Sken if ((i == beio->num_segs - 1) 912229997Sken && (cur_size == 0)) 913229997Sken beio->send_complete = 1; 914229997Sken 915229997Sken mtx_unlock(&be_lun->lock); 916229997Sken 917229997Sken (*dev_data->csw->d_strategy)(bio); 918229997Sken } 919229997Sken } 920229997Sken} 921229997Sken 922229997Skenstatic void 923264274Smavctl_be_block_cw_done_ws(struct ctl_be_block_io *beio) 924264274Smav{ 925264274Smav union ctl_io *io; 926264274Smav 927264274Smav io = beio->io; 928264274Smav ctl_free_beio(beio); 929264274Smav if (((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE) 930264274Smav && ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 931264274Smav ctl_config_write_done(io); 932264274Smav return; 933264274Smav } 934264274Smav 935264274Smav ctl_be_block_config_write(io); 936264274Smav} 937264274Smav 938264274Smavstatic void 939264274Smavctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun, 940264274Smav union ctl_io *io) 941264274Smav{ 942264274Smav struct ctl_be_block_io *beio; 943264274Smav struct ctl_be_block_softc *softc; 944264274Smav struct ctl_lba_len_flags lbalen; 945264274Smav uint64_t len_left, lba; 946264274Smav int i, seglen; 947264274Smav uint8_t *buf, *end; 948264274Smav 949264274Smav DPRINTF("entered\n"); 950264274Smav 951264274Smav beio = io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr; 952264274Smav softc = be_lun->softc; 953264274Smav memcpy(&lbalen, io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, 954264274Smav sizeof(lbalen)); 955264274Smav 956264274Smav if (lbalen.flags & ~(SWS_LBDATA | SWS_UNMAP) || 957264274Smav (lbalen.flags & SWS_UNMAP && be_lun->unmap == NULL)) { 958264274Smav ctl_free_beio(beio); 959264274Smav ctl_set_invalid_field(&io->scsiio, 960264274Smav /*sks_valid*/ 1, 961264274Smav /*command*/ 1, 962264274Smav /*field*/ 1, 963264274Smav /*bit_valid*/ 0, 964264274Smav /*bit*/ 0); 965264274Smav ctl_config_write_done(io); 966264274Smav return; 967264274Smav } 968264274Smav 969264274Smav /* 970264274Smav * If the I/O came down with an ordered or head of queue tag, set 971264274Smav * the BIO_ORDERED attribute. For head of queue tags, that's 972264274Smav * pretty much the best we can do. 973264274Smav */ 974264274Smav if ((io->scsiio.tag_type == CTL_TAG_ORDERED) 975264274Smav || (io->scsiio.tag_type == CTL_TAG_HEAD_OF_QUEUE)) 976264274Smav beio->bio_flags = BIO_ORDERED; 977264274Smav 978264274Smav switch (io->scsiio.tag_type) { 979264274Smav case CTL_TAG_ORDERED: 980264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 981264274Smav break; 982264274Smav case CTL_TAG_HEAD_OF_QUEUE: 983264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 984264274Smav break; 985264274Smav case CTL_TAG_UNTAGGED: 986264274Smav case CTL_TAG_SIMPLE: 987264274Smav case CTL_TAG_ACA: 988264274Smav default: 989264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 990264274Smav break; 991264274Smav } 992264274Smav 993264274Smav if (lbalen.flags & SWS_UNMAP) { 994264274Smav beio->io_offset = lbalen.lba * be_lun->blocksize; 995264274Smav beio->io_len = (uint64_t)lbalen.len * be_lun->blocksize; 996264274Smav beio->bio_cmd = BIO_DELETE; 997264274Smav beio->ds_trans_type = DEVSTAT_FREE; 998264274Smav 999264274Smav be_lun->unmap(be_lun, beio); 1000264274Smav return; 1001264274Smav } 1002264274Smav 1003264274Smav beio->bio_cmd = BIO_WRITE; 1004264274Smav beio->ds_trans_type = DEVSTAT_WRITE; 1005264274Smav 1006264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1007264274Smav (uintmax_t)lbalen.lba, lbalen.len); 1008264274Smav 1009264274Smav len_left = (uint64_t)lbalen.len * be_lun->blocksize; 1010264274Smav for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) { 1011264274Smav 1012264274Smav /* 1013264274Smav * Setup the S/G entry for this chunk. 1014264274Smav */ 1015264274Smav seglen = MIN(MAXPHYS, len_left); 1016264274Smav seglen -= seglen % be_lun->blocksize; 1017264274Smav beio->sg_segs[i].len = seglen; 1018264274Smav beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1019264274Smav 1020264274Smav DPRINTF("segment %d addr %p len %zd\n", i, 1021264274Smav beio->sg_segs[i].addr, beio->sg_segs[i].len); 1022264274Smav 1023264274Smav beio->num_segs++; 1024264274Smav len_left -= seglen; 1025264274Smav 1026264274Smav buf = beio->sg_segs[i].addr; 1027264274Smav end = buf + seglen; 1028264274Smav for (; buf < end; buf += be_lun->blocksize) { 1029264274Smav memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize); 1030264274Smav if (lbalen.flags & SWS_LBDATA) 1031264274Smav scsi_ulto4b(lbalen.lba + lba, buf); 1032264274Smav lba++; 1033264274Smav } 1034264274Smav } 1035264274Smav 1036264274Smav beio->io_offset = lbalen.lba * be_lun->blocksize; 1037264274Smav beio->io_len = lba * be_lun->blocksize; 1038264274Smav 1039264274Smav /* We can not do all in one run. Correct and schedule rerun. */ 1040264274Smav if (len_left > 0) { 1041264274Smav lbalen.lba += lba; 1042264274Smav lbalen.len -= lba; 1043264274Smav memcpy(io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, &lbalen, 1044264274Smav sizeof(lbalen)); 1045264274Smav beio->beio_cont = ctl_be_block_cw_done_ws; 1046264274Smav } 1047264274Smav 1048264274Smav be_lun->dispatch(be_lun, beio); 1049264274Smav} 1050264274Smav 1051264274Smavstatic void 1052264274Smavctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun, 1053264274Smav union ctl_io *io) 1054264274Smav{ 1055264274Smav struct ctl_be_block_io *beio; 1056264274Smav struct ctl_be_block_softc *softc; 1057264274Smav struct ctl_ptr_len_flags ptrlen; 1058264274Smav 1059264274Smav DPRINTF("entered\n"); 1060264274Smav 1061264274Smav beio = io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr; 1062264274Smav softc = be_lun->softc; 1063264274Smav memcpy(&ptrlen, io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, 1064264274Smav sizeof(ptrlen)); 1065264274Smav 1066264274Smav if (ptrlen.flags != 0 || be_lun->unmap == NULL) { 1067264274Smav ctl_free_beio(beio); 1068264274Smav ctl_set_invalid_field(&io->scsiio, 1069264274Smav /*sks_valid*/ 0, 1070264274Smav /*command*/ 1, 1071264274Smav /*field*/ 0, 1072264274Smav /*bit_valid*/ 0, 1073264274Smav /*bit*/ 0); 1074264274Smav ctl_config_write_done(io); 1075264274Smav return; 1076264274Smav } 1077264274Smav 1078264274Smav /* 1079264274Smav * If the I/O came down with an ordered or head of queue tag, set 1080264274Smav * the BIO_ORDERED attribute. For head of queue tags, that's 1081264274Smav * pretty much the best we can do. 1082264274Smav */ 1083264274Smav if ((io->scsiio.tag_type == CTL_TAG_ORDERED) 1084264274Smav || (io->scsiio.tag_type == CTL_TAG_HEAD_OF_QUEUE)) 1085264274Smav beio->bio_flags = BIO_ORDERED; 1086264274Smav 1087264274Smav switch (io->scsiio.tag_type) { 1088264274Smav case CTL_TAG_ORDERED: 1089264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1090264274Smav break; 1091264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1092264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1093264274Smav break; 1094264274Smav case CTL_TAG_UNTAGGED: 1095264274Smav case CTL_TAG_SIMPLE: 1096264274Smav case CTL_TAG_ACA: 1097264274Smav default: 1098264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1099264274Smav break; 1100264274Smav } 1101264274Smav 1102264274Smav beio->io_len = 0; 1103264274Smav beio->io_offset = -1; 1104264274Smav 1105264274Smav beio->bio_cmd = BIO_DELETE; 1106264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1107264274Smav 1108264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1109264274Smav (uintmax_t)lbalen.lba, lbalen.len); 1110264274Smav 1111264274Smav be_lun->unmap(be_lun, beio); 1112264274Smav} 1113264274Smav 1114264274Smavstatic void 1115264274Smavctl_be_block_cw_done(struct ctl_be_block_io *beio) 1116264274Smav{ 1117264274Smav union ctl_io *io; 1118264274Smav 1119264274Smav io = beio->io; 1120264274Smav ctl_free_beio(beio); 1121264274Smav ctl_config_write_done(io); 1122264274Smav} 1123264274Smav 1124264274Smavstatic void 1125229997Skenctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 1126229997Sken union ctl_io *io) 1127229997Sken{ 1128229997Sken struct ctl_be_block_io *beio; 1129229997Sken struct ctl_be_block_softc *softc; 1130229997Sken 1131229997Sken DPRINTF("entered\n"); 1132229997Sken 1133229997Sken softc = be_lun->softc; 1134229997Sken beio = ctl_alloc_beio(softc); 1135229997Sken beio->io = io; 1136229997Sken beio->lun = be_lun; 1137264274Smav beio->beio_cont = ctl_be_block_cw_done; 1138229997Sken io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr = beio; 1139229997Sken 1140229997Sken switch (io->scsiio.cdb[0]) { 1141229997Sken case SYNCHRONIZE_CACHE: 1142229997Sken case SYNCHRONIZE_CACHE_16: 1143249194Strasz beio->bio_cmd = BIO_FLUSH; 1144229997Sken beio->ds_trans_type = DEVSTAT_NO_DATA; 1145229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1146229997Sken beio->io_len = 0; 1147229997Sken be_lun->lun_flush(be_lun, beio); 1148229997Sken break; 1149264274Smav case WRITE_SAME_10: 1150264274Smav case WRITE_SAME_16: 1151264274Smav ctl_be_block_cw_dispatch_ws(be_lun, io); 1152264274Smav break; 1153264274Smav case UNMAP: 1154264274Smav ctl_be_block_cw_dispatch_unmap(be_lun, io); 1155264274Smav break; 1156229997Sken default: 1157229997Sken panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1158229997Sken break; 1159229997Sken } 1160229997Sken} 1161229997Sken 1162258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t"); 1163258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t"); 1164258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t"); 1165258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t"); 1166229997Sken 1167229997Skenstatic void 1168229997Skenctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 1169229997Sken union ctl_io *io) 1170229997Sken{ 1171229997Sken struct ctl_be_block_io *beio; 1172229997Sken struct ctl_be_block_softc *softc; 1173229997Sken struct ctl_lba_len lbalen; 1174229997Sken uint64_t len_left, io_size_bytes; 1175229997Sken int i; 1176229997Sken 1177229997Sken softc = be_lun->softc; 1178229997Sken 1179229997Sken DPRINTF("entered\n"); 1180229997Sken 1181229997Sken if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) { 1182229997Sken SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0); 1183229997Sken } else { 1184229997Sken SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0); 1185229997Sken } 1186229997Sken 1187229997Sken memcpy(&lbalen, io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, 1188229997Sken sizeof(lbalen)); 1189229997Sken 1190229997Sken io_size_bytes = lbalen.len * be_lun->blocksize; 1191229997Sken 1192229997Sken /* 1193229997Sken * XXX KDM this is temporary, until we implement chaining of beio 1194229997Sken * structures and multiple datamove calls to move all the data in 1195229997Sken * or out. 1196229997Sken */ 1197229997Sken if (io_size_bytes > CTLBLK_MAX_IO_SIZE) { 1198229997Sken printf("%s: IO length %ju > max io size %u\n", __func__, 1199229997Sken io_size_bytes, CTLBLK_MAX_IO_SIZE); 1200229997Sken ctl_set_invalid_field(&io->scsiio, 1201229997Sken /*sks_valid*/ 0, 1202229997Sken /*command*/ 1, 1203229997Sken /*field*/ 0, 1204229997Sken /*bit_valid*/ 0, 1205229997Sken /*bit*/ 0); 1206229997Sken ctl_done(io); 1207229997Sken return; 1208229997Sken } 1209229997Sken 1210229997Sken beio = ctl_alloc_beio(softc); 1211229997Sken beio->io = io; 1212229997Sken beio->lun = be_lun; 1213229997Sken io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr = beio; 1214229997Sken 1215229997Sken /* 1216229997Sken * If the I/O came down with an ordered or head of queue tag, set 1217229997Sken * the BIO_ORDERED attribute. For head of queue tags, that's 1218229997Sken * pretty much the best we can do. 1219229997Sken * 1220229997Sken * XXX KDM we don't have a great way to easily know about the FUA 1221229997Sken * bit right now (it is decoded in ctl_read_write(), but we don't 1222229997Sken * pass that knowledge to the backend), and in any case we would 1223229997Sken * need to determine how to handle it. 1224229997Sken */ 1225229997Sken if ((io->scsiio.tag_type == CTL_TAG_ORDERED) 1226229997Sken || (io->scsiio.tag_type == CTL_TAG_HEAD_OF_QUEUE)) 1227229997Sken beio->bio_flags = BIO_ORDERED; 1228229997Sken 1229229997Sken switch (io->scsiio.tag_type) { 1230229997Sken case CTL_TAG_ORDERED: 1231229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1232229997Sken break; 1233229997Sken case CTL_TAG_HEAD_OF_QUEUE: 1234229997Sken beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1235229997Sken break; 1236229997Sken case CTL_TAG_UNTAGGED: 1237229997Sken case CTL_TAG_SIMPLE: 1238229997Sken case CTL_TAG_ACA: 1239229997Sken default: 1240229997Sken beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1241229997Sken break; 1242229997Sken } 1243229997Sken 1244229997Sken /* 1245229997Sken * This path handles read and write only. The config write path 1246229997Sken * handles flush operations. 1247229997Sken */ 1248229997Sken if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) { 1249229997Sken beio->bio_cmd = BIO_READ; 1250229997Sken beio->ds_trans_type = DEVSTAT_READ; 1251229997Sken } else { 1252229997Sken beio->bio_cmd = BIO_WRITE; 1253229997Sken beio->ds_trans_type = DEVSTAT_WRITE; 1254229997Sken } 1255229997Sken 1256229997Sken beio->io_len = lbalen.len * be_lun->blocksize; 1257229997Sken beio->io_offset = lbalen.lba * be_lun->blocksize; 1258229997Sken 1259229997Sken DPRINTF("%s at LBA %jx len %u\n", 1260229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", 1261229997Sken (uintmax_t)lbalen.lba, lbalen.len); 1262229997Sken 1263229997Sken for (i = 0, len_left = io_size_bytes; i < CTLBLK_MAX_SEGS && 1264229997Sken len_left > 0; i++) { 1265229997Sken 1266229997Sken /* 1267229997Sken * Setup the S/G entry for this chunk. 1268229997Sken */ 1269229997Sken beio->sg_segs[i].len = min(MAXPHYS, len_left); 1270229997Sken beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1271229997Sken 1272229997Sken DPRINTF("segment %d addr %p len %zd\n", i, 1273229997Sken beio->sg_segs[i].addr, beio->sg_segs[i].len); 1274229997Sken 1275229997Sken beio->num_segs++; 1276229997Sken len_left -= beio->sg_segs[i].len; 1277229997Sken } 1278229997Sken 1279229997Sken /* 1280229997Sken * For the read case, we need to read the data into our buffers and 1281229997Sken * then we can send it back to the user. For the write case, we 1282229997Sken * need to get the data from the user first. 1283229997Sken */ 1284229997Sken if (beio->bio_cmd == BIO_READ) { 1285229997Sken SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0); 1286229997Sken be_lun->dispatch(be_lun, beio); 1287229997Sken } else { 1288229997Sken SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0); 1289229997Sken io->scsiio.be_move_done = ctl_be_block_move_done; 1290229997Sken io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 1291229997Sken io->scsiio.kern_data_len = beio->io_len; 1292229997Sken io->scsiio.kern_total_len = beio->io_len; 1293229997Sken io->scsiio.kern_rel_offset = 0; 1294229997Sken io->scsiio.kern_data_resid = 0; 1295229997Sken io->scsiio.kern_sg_entries = beio->num_segs; 1296229997Sken io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 1297229997Sken#ifdef CTL_TIME_IO 1298229997Sken getbintime(&io->io_hdr.dma_start_bt); 1299229997Sken#endif 1300229997Sken ctl_datamove(io); 1301229997Sken } 1302229997Sken} 1303229997Sken 1304229997Skenstatic void 1305229997Skenctl_be_block_worker(void *context, int pending) 1306229997Sken{ 1307229997Sken struct ctl_be_block_lun *be_lun; 1308229997Sken struct ctl_be_block_softc *softc; 1309229997Sken union ctl_io *io; 1310229997Sken 1311229997Sken be_lun = (struct ctl_be_block_lun *)context; 1312229997Sken softc = be_lun->softc; 1313229997Sken 1314229997Sken DPRINTF("entered\n"); 1315229997Sken 1316229997Sken mtx_lock(&be_lun->lock); 1317229997Sken for (;;) { 1318229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue); 1319229997Sken if (io != NULL) { 1320229997Sken struct ctl_be_block_io *beio; 1321229997Sken 1322229997Sken DPRINTF("datamove queue\n"); 1323229997Sken 1324229997Sken STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr, 1325229997Sken ctl_io_hdr, links); 1326229997Sken 1327229997Sken mtx_unlock(&be_lun->lock); 1328229997Sken 1329229997Sken beio = (struct ctl_be_block_io *) 1330229997Sken io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr; 1331229997Sken 1332229997Sken be_lun->dispatch(be_lun, beio); 1333229997Sken 1334229997Sken mtx_lock(&be_lun->lock); 1335229997Sken continue; 1336229997Sken } 1337229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue); 1338229997Sken if (io != NULL) { 1339229997Sken 1340229997Sken DPRINTF("config write queue\n"); 1341229997Sken 1342229997Sken STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr, 1343229997Sken ctl_io_hdr, links); 1344229997Sken 1345229997Sken mtx_unlock(&be_lun->lock); 1346229997Sken 1347229997Sken ctl_be_block_cw_dispatch(be_lun, io); 1348229997Sken 1349229997Sken mtx_lock(&be_lun->lock); 1350229997Sken continue; 1351229997Sken } 1352229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue); 1353229997Sken if (io != NULL) { 1354229997Sken DPRINTF("input queue\n"); 1355229997Sken 1356229997Sken STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr, 1357229997Sken ctl_io_hdr, links); 1358229997Sken mtx_unlock(&be_lun->lock); 1359229997Sken 1360229997Sken /* 1361229997Sken * We must drop the lock, since this routine and 1362229997Sken * its children may sleep. 1363229997Sken */ 1364229997Sken ctl_be_block_dispatch(be_lun, io); 1365229997Sken 1366229997Sken mtx_lock(&be_lun->lock); 1367229997Sken continue; 1368229997Sken } 1369229997Sken 1370229997Sken /* 1371229997Sken * If we get here, there is no work left in the queues, so 1372229997Sken * just break out and let the task queue go to sleep. 1373229997Sken */ 1374229997Sken break; 1375229997Sken } 1376229997Sken mtx_unlock(&be_lun->lock); 1377229997Sken} 1378229997Sken 1379229997Sken/* 1380229997Sken * Entry point from CTL to the backend for I/O. We queue everything to a 1381229997Sken * work thread, so this just puts the I/O on a queue and wakes up the 1382229997Sken * thread. 1383229997Sken */ 1384229997Skenstatic int 1385229997Skenctl_be_block_submit(union ctl_io *io) 1386229997Sken{ 1387229997Sken struct ctl_be_block_lun *be_lun; 1388229997Sken struct ctl_be_lun *ctl_be_lun; 1389229997Sken int retval; 1390229997Sken 1391229997Sken DPRINTF("entered\n"); 1392229997Sken 1393229997Sken retval = CTL_RETVAL_COMPLETE; 1394229997Sken 1395229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 1396229997Sken CTL_PRIV_BACKEND_LUN].ptr; 1397229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 1398229997Sken 1399229997Sken /* 1400229997Sken * Make sure we only get SCSI I/O. 1401229997Sken */ 1402229997Sken KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type " 1403229997Sken "%#x) encountered", io->io_hdr.io_type)); 1404229997Sken 1405229997Sken mtx_lock(&be_lun->lock); 1406229997Sken /* 1407229997Sken * XXX KDM make sure that links is okay to use at this point. 1408229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 1409229997Sken * or deal with resource allocation here. 1410229997Sken */ 1411229997Sken STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1412229997Sken mtx_unlock(&be_lun->lock); 1413229997Sken 1414229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1415229997Sken 1416229997Sken return (retval); 1417229997Sken} 1418229997Sken 1419229997Skenstatic int 1420229997Skenctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 1421229997Sken int flag, struct thread *td) 1422229997Sken{ 1423229997Sken struct ctl_be_block_softc *softc; 1424229997Sken int error; 1425229997Sken 1426229997Sken softc = &backend_block_softc; 1427229997Sken 1428229997Sken error = 0; 1429229997Sken 1430229997Sken switch (cmd) { 1431229997Sken case CTL_LUN_REQ: { 1432229997Sken struct ctl_lun_req *lun_req; 1433229997Sken 1434229997Sken lun_req = (struct ctl_lun_req *)addr; 1435229997Sken 1436229997Sken switch (lun_req->reqtype) { 1437229997Sken case CTL_LUNREQ_CREATE: 1438229997Sken error = ctl_be_block_create(softc, lun_req); 1439229997Sken break; 1440229997Sken case CTL_LUNREQ_RM: 1441229997Sken error = ctl_be_block_rm(softc, lun_req); 1442229997Sken break; 1443232604Strasz case CTL_LUNREQ_MODIFY: 1444232604Strasz error = ctl_be_block_modify(softc, lun_req); 1445232604Strasz break; 1446229997Sken default: 1447229997Sken lun_req->status = CTL_LUN_ERROR; 1448229997Sken snprintf(lun_req->error_str, sizeof(lun_req->error_str), 1449229997Sken "%s: invalid LUN request type %d", __func__, 1450229997Sken lun_req->reqtype); 1451229997Sken break; 1452229997Sken } 1453229997Sken break; 1454229997Sken } 1455229997Sken default: 1456229997Sken error = ENOTTY; 1457229997Sken break; 1458229997Sken } 1459229997Sken 1460229997Sken return (error); 1461229997Sken} 1462229997Sken 1463229997Skenstatic int 1464229997Skenctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1465229997Sken{ 1466229997Sken struct ctl_be_block_filedata *file_data; 1467229997Sken struct ctl_lun_create_params *params; 1468229997Sken struct vattr vattr; 1469229997Sken int error; 1470229997Sken 1471229997Sken error = 0; 1472229997Sken file_data = &be_lun->backend.file; 1473229997Sken params = &req->reqdata.create; 1474229997Sken 1475229997Sken be_lun->dev_type = CTL_BE_BLOCK_FILE; 1476229997Sken be_lun->dispatch = ctl_be_block_dispatch_file; 1477229997Sken be_lun->lun_flush = ctl_be_block_flush_file; 1478229997Sken 1479229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 1480229997Sken if (error != 0) { 1481229997Sken snprintf(req->error_str, sizeof(req->error_str), 1482229997Sken "error calling VOP_GETATTR() for file %s", 1483229997Sken be_lun->dev_path); 1484229997Sken return (error); 1485229997Sken } 1486229997Sken 1487229997Sken /* 1488229997Sken * Verify that we have the ability to upgrade to exclusive 1489229997Sken * access on this file so we can trap errors at open instead 1490229997Sken * of reporting them during first access. 1491229997Sken */ 1492229997Sken if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) { 1493229997Sken vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY); 1494229997Sken if (be_lun->vn->v_iflag & VI_DOOMED) { 1495229997Sken error = EBADF; 1496229997Sken snprintf(req->error_str, sizeof(req->error_str), 1497229997Sken "error locking file %s", be_lun->dev_path); 1498229997Sken return (error); 1499229997Sken } 1500229997Sken } 1501229997Sken 1502229997Sken 1503229997Sken file_data->cred = crhold(curthread->td_ucred); 1504232604Strasz if (params->lun_size_bytes != 0) 1505232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1506232604Strasz else 1507232604Strasz be_lun->size_bytes = vattr.va_size; 1508229997Sken /* 1509229997Sken * We set the multi thread flag for file operations because all 1510229997Sken * filesystems (in theory) are capable of allowing multiple readers 1511229997Sken * of a file at once. So we want to get the maximum possible 1512229997Sken * concurrency. 1513229997Sken */ 1514229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD; 1515229997Sken 1516229997Sken /* 1517229997Sken * XXX KDM vattr.va_blocksize may be larger than 512 bytes here. 1518229997Sken * With ZFS, it is 131072 bytes. Block sizes that large don't work 1519229997Sken * with disklabel and UFS on FreeBSD at least. Large block sizes 1520229997Sken * may not work with other OSes as well. So just export a sector 1521229997Sken * size of 512 bytes, which should work with any OS or 1522229997Sken * application. Since our backing is a file, any block size will 1523229997Sken * work fine for the backing store. 1524229997Sken */ 1525229997Sken#if 0 1526229997Sken be_lun->blocksize= vattr.va_blocksize; 1527229997Sken#endif 1528229997Sken if (params->blocksize_bytes != 0) 1529229997Sken be_lun->blocksize = params->blocksize_bytes; 1530229997Sken else 1531229997Sken be_lun->blocksize = 512; 1532229997Sken 1533229997Sken /* 1534229997Sken * Sanity check. The media size has to be at least one 1535229997Sken * sector long. 1536229997Sken */ 1537229997Sken if (be_lun->size_bytes < be_lun->blocksize) { 1538229997Sken error = EINVAL; 1539229997Sken snprintf(req->error_str, sizeof(req->error_str), 1540229997Sken "file %s size %ju < block size %u", be_lun->dev_path, 1541229997Sken (uintmax_t)be_lun->size_bytes, be_lun->blocksize); 1542229997Sken } 1543229997Sken return (error); 1544229997Sken} 1545229997Sken 1546229997Skenstatic int 1547229997Skenctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1548229997Sken{ 1549229997Sken struct ctl_lun_create_params *params; 1550229997Sken struct vattr vattr; 1551229997Sken struct cdev *dev; 1552229997Sken struct cdevsw *devsw; 1553229997Sken int error; 1554264191Smav off_t ps, pss, po, pos; 1555229997Sken 1556229997Sken params = &req->reqdata.create; 1557229997Sken 1558229997Sken be_lun->dev_type = CTL_BE_BLOCK_DEV; 1559229997Sken be_lun->dispatch = ctl_be_block_dispatch_dev; 1560229997Sken be_lun->lun_flush = ctl_be_block_flush_dev; 1561264274Smav be_lun->unmap = ctl_be_block_unmap_dev; 1562229997Sken be_lun->backend.dev.cdev = be_lun->vn->v_rdev; 1563229997Sken be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev, 1564229997Sken &be_lun->backend.dev.dev_ref); 1565229997Sken if (be_lun->backend.dev.csw == NULL) 1566229997Sken panic("Unable to retrieve device switch"); 1567229997Sken 1568229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED); 1569229997Sken if (error) { 1570229997Sken snprintf(req->error_str, sizeof(req->error_str), 1571229997Sken "%s: error getting vnode attributes for device %s", 1572229997Sken __func__, be_lun->dev_path); 1573229997Sken return (error); 1574229997Sken } 1575229997Sken 1576229997Sken dev = be_lun->vn->v_rdev; 1577229997Sken devsw = dev->si_devsw; 1578229997Sken if (!devsw->d_ioctl) { 1579229997Sken snprintf(req->error_str, sizeof(req->error_str), 1580229997Sken "%s: no d_ioctl for device %s!", __func__, 1581229997Sken be_lun->dev_path); 1582229997Sken return (ENODEV); 1583229997Sken } 1584229997Sken 1585229997Sken error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, 1586229997Sken (caddr_t)&be_lun->blocksize, FREAD, 1587229997Sken curthread); 1588229997Sken if (error) { 1589229997Sken snprintf(req->error_str, sizeof(req->error_str), 1590229997Sken "%s: error %d returned for DIOCGSECTORSIZE ioctl " 1591229997Sken "on %s!", __func__, error, be_lun->dev_path); 1592229997Sken return (error); 1593229997Sken } 1594229997Sken 1595229997Sken /* 1596229997Sken * If the user has asked for a blocksize that is greater than the 1597229997Sken * backing device's blocksize, we can do it only if the blocksize 1598229997Sken * the user is asking for is an even multiple of the underlying 1599229997Sken * device's blocksize. 1600229997Sken */ 1601229997Sken if ((params->blocksize_bytes != 0) 1602229997Sken && (params->blocksize_bytes > be_lun->blocksize)) { 1603229997Sken uint32_t bs_multiple, tmp_blocksize; 1604229997Sken 1605229997Sken bs_multiple = params->blocksize_bytes / be_lun->blocksize; 1606229997Sken 1607229997Sken tmp_blocksize = bs_multiple * be_lun->blocksize; 1608229997Sken 1609229997Sken if (tmp_blocksize == params->blocksize_bytes) { 1610229997Sken be_lun->blocksize = params->blocksize_bytes; 1611229997Sken } else { 1612229997Sken snprintf(req->error_str, sizeof(req->error_str), 1613229997Sken "%s: requested blocksize %u is not an even " 1614229997Sken "multiple of backing device blocksize %u", 1615229997Sken __func__, params->blocksize_bytes, 1616229997Sken be_lun->blocksize); 1617229997Sken return (EINVAL); 1618229997Sken 1619229997Sken } 1620229997Sken } else if ((params->blocksize_bytes != 0) 1621229997Sken && (params->blocksize_bytes != be_lun->blocksize)) { 1622229997Sken snprintf(req->error_str, sizeof(req->error_str), 1623229997Sken "%s: requested blocksize %u < backing device " 1624229997Sken "blocksize %u", __func__, params->blocksize_bytes, 1625229997Sken be_lun->blocksize); 1626229997Sken return (EINVAL); 1627229997Sken } 1628229997Sken 1629229997Sken error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 1630229997Sken (caddr_t)&be_lun->size_bytes, FREAD, 1631229997Sken curthread); 1632229997Sken if (error) { 1633229997Sken snprintf(req->error_str, sizeof(req->error_str), 1634232604Strasz "%s: error %d returned for DIOCGMEDIASIZE " 1635232604Strasz " ioctl on %s!", __func__, error, 1636232604Strasz be_lun->dev_path); 1637229997Sken return (error); 1638229997Sken } 1639229997Sken 1640232604Strasz if (params->lun_size_bytes != 0) { 1641232604Strasz if (params->lun_size_bytes > be_lun->size_bytes) { 1642232604Strasz snprintf(req->error_str, sizeof(req->error_str), 1643232604Strasz "%s: requested LUN size %ju > backing device " 1644232604Strasz "size %ju", __func__, 1645232604Strasz (uintmax_t)params->lun_size_bytes, 1646232604Strasz (uintmax_t)be_lun->size_bytes); 1647232604Strasz return (EINVAL); 1648232604Strasz } 1649232604Strasz 1650232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1651232604Strasz } 1652232604Strasz 1653264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE, 1654264191Smav (caddr_t)&ps, FREAD, curthread); 1655264191Smav if (error) 1656264191Smav ps = po = 0; 1657264191Smav else { 1658264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET, 1659264191Smav (caddr_t)&po, FREAD, curthread); 1660264191Smav if (error) 1661264191Smav po = 0; 1662264191Smav } 1663264191Smav pss = ps / be_lun->blocksize; 1664264191Smav pos = po / be_lun->blocksize; 1665264191Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1666264191Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1667264191Smav be_lun->pblockexp = fls(pss) - 1; 1668264191Smav be_lun->pblockoff = (pss - pos) % pss; 1669264191Smav } 1670264191Smav 1671229997Sken return (0); 1672229997Sken} 1673229997Sken 1674229997Skenstatic int 1675229997Skenctl_be_block_close(struct ctl_be_block_lun *be_lun) 1676229997Sken{ 1677229997Sken DROP_GIANT(); 1678229997Sken if (be_lun->vn) { 1679229997Sken int flags = FREAD | FWRITE; 1680229997Sken 1681229997Sken switch (be_lun->dev_type) { 1682229997Sken case CTL_BE_BLOCK_DEV: 1683229997Sken if (be_lun->backend.dev.csw) { 1684229997Sken dev_relthread(be_lun->backend.dev.cdev, 1685229997Sken be_lun->backend.dev.dev_ref); 1686229997Sken be_lun->backend.dev.csw = NULL; 1687229997Sken be_lun->backend.dev.cdev = NULL; 1688229997Sken } 1689229997Sken break; 1690229997Sken case CTL_BE_BLOCK_FILE: 1691229997Sken break; 1692229997Sken case CTL_BE_BLOCK_NONE: 1693258871Strasz break; 1694229997Sken default: 1695229997Sken panic("Unexpected backend type."); 1696229997Sken break; 1697229997Sken } 1698229997Sken 1699229997Sken (void)vn_close(be_lun->vn, flags, NOCRED, curthread); 1700229997Sken be_lun->vn = NULL; 1701229997Sken 1702229997Sken switch (be_lun->dev_type) { 1703229997Sken case CTL_BE_BLOCK_DEV: 1704229997Sken break; 1705229997Sken case CTL_BE_BLOCK_FILE: 1706229997Sken if (be_lun->backend.file.cred != NULL) { 1707229997Sken crfree(be_lun->backend.file.cred); 1708229997Sken be_lun->backend.file.cred = NULL; 1709229997Sken } 1710229997Sken break; 1711229997Sken case CTL_BE_BLOCK_NONE: 1712258871Strasz break; 1713229997Sken default: 1714229997Sken panic("Unexpected backend type."); 1715229997Sken break; 1716229997Sken } 1717229997Sken } 1718229997Sken PICKUP_GIANT(); 1719229997Sken 1720229997Sken return (0); 1721229997Sken} 1722229997Sken 1723229997Skenstatic int 1724229997Skenctl_be_block_open(struct ctl_be_block_softc *softc, 1725229997Sken struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1726229997Sken{ 1727229997Sken struct nameidata nd; 1728229997Sken int flags; 1729229997Sken int error; 1730229997Sken 1731229997Sken /* 1732229997Sken * XXX KDM allow a read-only option? 1733229997Sken */ 1734229997Sken flags = FREAD | FWRITE; 1735229997Sken error = 0; 1736229997Sken 1737229997Sken if (rootvnode == NULL) { 1738229997Sken snprintf(req->error_str, sizeof(req->error_str), 1739229997Sken "%s: Root filesystem is not mounted", __func__); 1740229997Sken return (1); 1741229997Sken } 1742229997Sken 1743229997Sken if (!curthread->td_proc->p_fd->fd_cdir) { 1744229997Sken curthread->td_proc->p_fd->fd_cdir = rootvnode; 1745229997Sken VREF(rootvnode); 1746229997Sken } 1747229997Sken if (!curthread->td_proc->p_fd->fd_rdir) { 1748229997Sken curthread->td_proc->p_fd->fd_rdir = rootvnode; 1749229997Sken VREF(rootvnode); 1750229997Sken } 1751229997Sken if (!curthread->td_proc->p_fd->fd_jdir) { 1752229997Sken curthread->td_proc->p_fd->fd_jdir = rootvnode; 1753229997Sken VREF(rootvnode); 1754229997Sken } 1755229997Sken 1756229997Sken again: 1757229997Sken NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread); 1758229997Sken error = vn_open(&nd, &flags, 0, NULL); 1759229997Sken if (error) { 1760229997Sken /* 1761229997Sken * This is the only reasonable guess we can make as far as 1762229997Sken * path if the user doesn't give us a fully qualified path. 1763229997Sken * If they want to specify a file, they need to specify the 1764229997Sken * full path. 1765229997Sken */ 1766229997Sken if (be_lun->dev_path[0] != '/') { 1767229997Sken char *dev_path = "/dev/"; 1768229997Sken char *dev_name; 1769229997Sken 1770229997Sken /* Try adding device path at beginning of name */ 1771229997Sken dev_name = malloc(strlen(be_lun->dev_path) 1772229997Sken + strlen(dev_path) + 1, 1773229997Sken M_CTLBLK, M_WAITOK); 1774229997Sken if (dev_name) { 1775229997Sken sprintf(dev_name, "%s%s", dev_path, 1776229997Sken be_lun->dev_path); 1777229997Sken free(be_lun->dev_path, M_CTLBLK); 1778229997Sken be_lun->dev_path = dev_name; 1779229997Sken goto again; 1780229997Sken } 1781229997Sken } 1782229997Sken snprintf(req->error_str, sizeof(req->error_str), 1783229997Sken "%s: error opening %s", __func__, be_lun->dev_path); 1784229997Sken return (error); 1785229997Sken } 1786229997Sken 1787229997Sken NDFREE(&nd, NDF_ONLY_PNBUF); 1788229997Sken 1789229997Sken be_lun->vn = nd.ni_vp; 1790229997Sken 1791229997Sken /* We only support disks and files. */ 1792229997Sken if (vn_isdisk(be_lun->vn, &error)) { 1793229997Sken error = ctl_be_block_open_dev(be_lun, req); 1794229997Sken } else if (be_lun->vn->v_type == VREG) { 1795229997Sken error = ctl_be_block_open_file(be_lun, req); 1796229997Sken } else { 1797229997Sken error = EINVAL; 1798229997Sken snprintf(req->error_str, sizeof(req->error_str), 1799258871Strasz "%s is not a disk or plain file", be_lun->dev_path); 1800229997Sken } 1801229997Sken VOP_UNLOCK(be_lun->vn, 0); 1802229997Sken 1803229997Sken if (error != 0) { 1804229997Sken ctl_be_block_close(be_lun); 1805229997Sken return (error); 1806229997Sken } 1807229997Sken 1808229997Sken be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 1809229997Sken be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 1810229997Sken 1811229997Sken return (0); 1812229997Sken} 1813229997Sken 1814229997Skenstatic int 1815229997Skenctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 1816229997Sken{ 1817229997Sken struct ctl_be_block_lun *be_lun; 1818229997Sken struct ctl_lun_create_params *params; 1819229997Sken struct ctl_be_arg *file_arg; 1820229997Sken char tmpstr[32]; 1821264274Smav int retval, num_threads, unmap; 1822229997Sken int i; 1823229997Sken 1824229997Sken params = &req->reqdata.create; 1825229997Sken retval = 0; 1826229997Sken 1827229997Sken num_threads = cbb_num_threads; 1828229997Sken 1829229997Sken file_arg = NULL; 1830229997Sken 1831229997Sken be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK); 1832229997Sken 1833229997Sken be_lun->softc = softc; 1834229997Sken STAILQ_INIT(&be_lun->input_queue); 1835229997Sken STAILQ_INIT(&be_lun->config_write_queue); 1836229997Sken STAILQ_INIT(&be_lun->datamove_queue); 1837254759Strasz STAILQ_INIT(&be_lun->ctl_be_lun.options); 1838229997Sken sprintf(be_lun->lunname, "cblk%d", softc->num_luns); 1839229997Sken mtx_init(&be_lun->lock, be_lun->lunname, NULL, MTX_DEF); 1840229997Sken 1841229997Sken be_lun->lun_zone = uma_zcreate(be_lun->lunname, MAXPHYS, 1842256995Smav NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0); 1843229997Sken 1844229997Sken if (be_lun->lun_zone == NULL) { 1845229997Sken snprintf(req->error_str, sizeof(req->error_str), 1846229997Sken "%s: error allocating UMA zone", __func__); 1847229997Sken goto bailout_error; 1848229997Sken } 1849229997Sken 1850229997Sken if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 1851229997Sken be_lun->ctl_be_lun.lun_type = params->device_type; 1852229997Sken else 1853229997Sken be_lun->ctl_be_lun.lun_type = T_DIRECT; 1854229997Sken 1855229997Sken if (be_lun->ctl_be_lun.lun_type == T_DIRECT) { 1856229997Sken for (i = 0; i < req->num_be_args; i++) { 1857249026Strasz if (strcmp(req->kern_be_args[i].kname, "file") == 0) { 1858229997Sken file_arg = &req->kern_be_args[i]; 1859229997Sken break; 1860229997Sken } 1861229997Sken } 1862229997Sken 1863229997Sken if (file_arg == NULL) { 1864229997Sken snprintf(req->error_str, sizeof(req->error_str), 1865229997Sken "%s: no file argument specified", __func__); 1866229997Sken goto bailout_error; 1867229997Sken } 1868229997Sken 1869229997Sken be_lun->dev_path = malloc(file_arg->vallen, M_CTLBLK, 1870229997Sken M_WAITOK | M_ZERO); 1871229997Sken 1872249026Strasz strlcpy(be_lun->dev_path, (char *)file_arg->kvalue, 1873229997Sken file_arg->vallen); 1874229997Sken 1875229997Sken retval = ctl_be_block_open(softc, be_lun, req); 1876229997Sken if (retval != 0) { 1877229997Sken retval = 0; 1878229997Sken goto bailout_error; 1879229997Sken } 1880229997Sken 1881229997Sken /* 1882229997Sken * Tell the user the size of the file/device. 1883229997Sken */ 1884229997Sken params->lun_size_bytes = be_lun->size_bytes; 1885229997Sken 1886229997Sken /* 1887229997Sken * The maximum LBA is the size - 1. 1888229997Sken */ 1889229997Sken be_lun->ctl_be_lun.maxlba = be_lun->size_blocks - 1; 1890229997Sken } else { 1891229997Sken /* 1892229997Sken * For processor devices, we don't have any size. 1893229997Sken */ 1894229997Sken be_lun->blocksize = 0; 1895264191Smav be_lun->pblockexp = 0; 1896264191Smav be_lun->pblockoff = 0; 1897229997Sken be_lun->size_blocks = 0; 1898229997Sken be_lun->size_bytes = 0; 1899229997Sken be_lun->ctl_be_lun.maxlba = 0; 1900229997Sken params->lun_size_bytes = 0; 1901229997Sken 1902229997Sken /* 1903229997Sken * Default to just 1 thread for processor devices. 1904229997Sken */ 1905229997Sken num_threads = 1; 1906229997Sken } 1907229997Sken 1908229997Sken /* 1909229997Sken * XXX This searching loop might be refactored to be combined with 1910229997Sken * the loop above, 1911229997Sken */ 1912264274Smav unmap = 0; 1913229997Sken for (i = 0; i < req->num_be_args; i++) { 1914249026Strasz if (strcmp(req->kern_be_args[i].kname, "num_threads") == 0) { 1915229997Sken struct ctl_be_arg *thread_arg; 1916229997Sken char num_thread_str[16]; 1917229997Sken int tmp_num_threads; 1918229997Sken 1919229997Sken 1920229997Sken thread_arg = &req->kern_be_args[i]; 1921229997Sken 1922249026Strasz strlcpy(num_thread_str, (char *)thread_arg->kvalue, 1923229997Sken min(thread_arg->vallen, 1924229997Sken sizeof(num_thread_str))); 1925229997Sken 1926229997Sken tmp_num_threads = strtol(num_thread_str, NULL, 0); 1927229997Sken 1928229997Sken /* 1929229997Sken * We don't let the user specify less than one 1930229997Sken * thread, but hope he's clueful enough not to 1931229997Sken * specify 1000 threads. 1932229997Sken */ 1933229997Sken if (tmp_num_threads < 1) { 1934229997Sken snprintf(req->error_str, sizeof(req->error_str), 1935229997Sken "%s: invalid number of threads %s", 1936229997Sken __func__, num_thread_str); 1937229997Sken goto bailout_error; 1938229997Sken } 1939229997Sken 1940229997Sken num_threads = tmp_num_threads; 1941264274Smav } else if (strcmp(req->kern_be_args[i].kname, "unmap") == 0 && 1942264274Smav strcmp(req->kern_be_args[i].kvalue, "on") == 0) { 1943264274Smav unmap = 1; 1944254759Strasz } else if (strcmp(req->kern_be_args[i].kname, "file") != 0 && 1945254759Strasz strcmp(req->kern_be_args[i].kname, "dev") != 0) { 1946254759Strasz struct ctl_be_lun_option *opt; 1947254759Strasz 1948254759Strasz opt = malloc(sizeof(*opt), M_CTLBLK, M_WAITOK); 1949254759Strasz opt->name = malloc(strlen(req->kern_be_args[i].kname) + 1, M_CTLBLK, M_WAITOK); 1950254759Strasz strcpy(opt->name, req->kern_be_args[i].kname); 1951254759Strasz opt->value = malloc(strlen(req->kern_be_args[i].kvalue) + 1, M_CTLBLK, M_WAITOK); 1952254759Strasz strcpy(opt->value, req->kern_be_args[i].kvalue); 1953254759Strasz STAILQ_INSERT_TAIL(&be_lun->ctl_be_lun.options, opt, links); 1954229997Sken } 1955229997Sken } 1956229997Sken 1957229997Sken be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED; 1958229997Sken be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY; 1959264274Smav if (unmap) 1960264274Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 1961229997Sken be_lun->ctl_be_lun.be_lun = be_lun; 1962229997Sken be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 1963264191Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 1964264191Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 1965229997Sken /* Tell the user the blocksize we ended up using */ 1966229997Sken params->blocksize_bytes = be_lun->blocksize; 1967229997Sken if (params->flags & CTL_LUN_FLAG_ID_REQ) { 1968229997Sken be_lun->ctl_be_lun.req_lun_id = params->req_lun_id; 1969229997Sken be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ; 1970229997Sken } else 1971229997Sken be_lun->ctl_be_lun.req_lun_id = 0; 1972229997Sken 1973229997Sken be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown; 1974229997Sken be_lun->ctl_be_lun.lun_config_status = 1975229997Sken ctl_be_block_lun_config_status; 1976229997Sken be_lun->ctl_be_lun.be = &ctl_be_block_driver; 1977229997Sken 1978229997Sken if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 1979229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d", 1980229997Sken softc->num_luns); 1981229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr, 1982229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.serial_num), 1983229997Sken sizeof(tmpstr))); 1984229997Sken 1985229997Sken /* Tell the user what we used for a serial number */ 1986229997Sken strncpy((char *)params->serial_num, tmpstr, 1987229997Sken ctl_min(sizeof(params->serial_num), sizeof(tmpstr))); 1988229997Sken } else { 1989229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, 1990229997Sken params->serial_num, 1991229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.serial_num), 1992229997Sken sizeof(params->serial_num))); 1993229997Sken } 1994229997Sken if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 1995229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns); 1996229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr, 1997229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.device_id), 1998229997Sken sizeof(tmpstr))); 1999229997Sken 2000229997Sken /* Tell the user what we used for a device ID */ 2001229997Sken strncpy((char *)params->device_id, tmpstr, 2002229997Sken ctl_min(sizeof(params->device_id), sizeof(tmpstr))); 2003229997Sken } else { 2004229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, 2005229997Sken params->device_id, 2006229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.device_id), 2007229997Sken sizeof(params->device_id))); 2008229997Sken } 2009229997Sken 2010229997Sken TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun); 2011229997Sken 2012229997Sken be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK, 2013229997Sken taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 2014229997Sken 2015229997Sken if (be_lun->io_taskqueue == NULL) { 2016229997Sken snprintf(req->error_str, sizeof(req->error_str), 2017229997Sken "%s: Unable to create taskqueue", __func__); 2018229997Sken goto bailout_error; 2019229997Sken } 2020229997Sken 2021229997Sken /* 2022229997Sken * Note that we start the same number of threads by default for 2023229997Sken * both the file case and the block device case. For the file 2024229997Sken * case, we need multiple threads to allow concurrency, because the 2025229997Sken * vnode interface is designed to be a blocking interface. For the 2026229997Sken * block device case, ZFS zvols at least will block the caller's 2027229997Sken * context in many instances, and so we need multiple threads to 2028229997Sken * overcome that problem. Other block devices don't need as many 2029229997Sken * threads, but they shouldn't cause too many problems. 2030229997Sken * 2031229997Sken * If the user wants to just have a single thread for a block 2032229997Sken * device, he can specify that when the LUN is created, or change 2033229997Sken * the tunable/sysctl to alter the default number of threads. 2034229997Sken */ 2035229997Sken retval = taskqueue_start_threads(&be_lun->io_taskqueue, 2036229997Sken /*num threads*/num_threads, 2037229997Sken /*priority*/PWAIT, 2038229997Sken /*thread name*/ 2039229997Sken "%s taskq", be_lun->lunname); 2040229997Sken 2041229997Sken if (retval != 0) 2042229997Sken goto bailout_error; 2043229997Sken 2044229997Sken be_lun->num_threads = num_threads; 2045229997Sken 2046229997Sken mtx_lock(&softc->lock); 2047229997Sken softc->num_luns++; 2048229997Sken STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links); 2049229997Sken 2050229997Sken mtx_unlock(&softc->lock); 2051229997Sken 2052229997Sken retval = ctl_add_lun(&be_lun->ctl_be_lun); 2053229997Sken if (retval != 0) { 2054229997Sken mtx_lock(&softc->lock); 2055229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2056229997Sken links); 2057229997Sken softc->num_luns--; 2058229997Sken mtx_unlock(&softc->lock); 2059229997Sken snprintf(req->error_str, sizeof(req->error_str), 2060229997Sken "%s: ctl_add_lun() returned error %d, see dmesg for " 2061229997Sken "details", __func__, retval); 2062229997Sken retval = 0; 2063229997Sken goto bailout_error; 2064229997Sken } 2065229997Sken 2066229997Sken mtx_lock(&softc->lock); 2067229997Sken 2068229997Sken /* 2069229997Sken * Tell the config_status routine that we're waiting so it won't 2070229997Sken * clean up the LUN in the event of an error. 2071229997Sken */ 2072229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2073229997Sken 2074229997Sken while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) { 2075229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2076229997Sken if (retval == EINTR) 2077229997Sken break; 2078229997Sken } 2079229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2080229997Sken 2081229997Sken if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) { 2082229997Sken snprintf(req->error_str, sizeof(req->error_str), 2083229997Sken "%s: LUN configuration error, see dmesg for details", 2084229997Sken __func__); 2085229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2086229997Sken links); 2087229997Sken softc->num_luns--; 2088229997Sken mtx_unlock(&softc->lock); 2089229997Sken goto bailout_error; 2090229997Sken } else { 2091229997Sken params->req_lun_id = be_lun->ctl_be_lun.lun_id; 2092229997Sken } 2093229997Sken 2094229997Sken mtx_unlock(&softc->lock); 2095229997Sken 2096229997Sken be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id, 2097229997Sken be_lun->blocksize, 2098229997Sken DEVSTAT_ALL_SUPPORTED, 2099229997Sken be_lun->ctl_be_lun.lun_type 2100229997Sken | DEVSTAT_TYPE_IF_OTHER, 2101229997Sken DEVSTAT_PRIORITY_OTHER); 2102229997Sken 2103229997Sken 2104229997Sken req->status = CTL_LUN_OK; 2105229997Sken 2106229997Sken return (retval); 2107229997Sken 2108229997Skenbailout_error: 2109229997Sken req->status = CTL_LUN_ERROR; 2110229997Sken 2111229997Sken ctl_be_block_close(be_lun); 2112229997Sken 2113229997Sken free(be_lun->dev_path, M_CTLBLK); 2114229997Sken free(be_lun, M_CTLBLK); 2115229997Sken 2116229997Sken return (retval); 2117229997Sken} 2118229997Sken 2119229997Skenstatic int 2120229997Skenctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2121229997Sken{ 2122229997Sken struct ctl_lun_rm_params *params; 2123229997Sken struct ctl_be_block_lun *be_lun; 2124229997Sken int retval; 2125229997Sken 2126229997Sken params = &req->reqdata.rm; 2127229997Sken 2128229997Sken mtx_lock(&softc->lock); 2129229997Sken 2130229997Sken be_lun = NULL; 2131229997Sken 2132229997Sken STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2133229997Sken if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2134229997Sken break; 2135229997Sken } 2136229997Sken mtx_unlock(&softc->lock); 2137229997Sken 2138229997Sken if (be_lun == NULL) { 2139229997Sken snprintf(req->error_str, sizeof(req->error_str), 2140229997Sken "%s: LUN %u is not managed by the block backend", 2141229997Sken __func__, params->lun_id); 2142229997Sken goto bailout_error; 2143229997Sken } 2144229997Sken 2145229997Sken retval = ctl_disable_lun(&be_lun->ctl_be_lun); 2146229997Sken 2147229997Sken if (retval != 0) { 2148229997Sken snprintf(req->error_str, sizeof(req->error_str), 2149229997Sken "%s: error %d returned from ctl_disable_lun() for " 2150229997Sken "LUN %d", __func__, retval, params->lun_id); 2151229997Sken goto bailout_error; 2152229997Sken 2153229997Sken } 2154229997Sken 2155229997Sken retval = ctl_invalidate_lun(&be_lun->ctl_be_lun); 2156229997Sken if (retval != 0) { 2157229997Sken snprintf(req->error_str, sizeof(req->error_str), 2158229997Sken "%s: error %d returned from ctl_invalidate_lun() for " 2159229997Sken "LUN %d", __func__, retval, params->lun_id); 2160229997Sken goto bailout_error; 2161229997Sken } 2162229997Sken 2163229997Sken mtx_lock(&softc->lock); 2164229997Sken 2165229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2166229997Sken 2167229997Sken while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2168229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2169229997Sken if (retval == EINTR) 2170229997Sken break; 2171229997Sken } 2172229997Sken 2173229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2174229997Sken 2175229997Sken if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2176229997Sken snprintf(req->error_str, sizeof(req->error_str), 2177229997Sken "%s: interrupted waiting for LUN to be freed", 2178229997Sken __func__); 2179229997Sken mtx_unlock(&softc->lock); 2180229997Sken goto bailout_error; 2181229997Sken } 2182229997Sken 2183229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links); 2184229997Sken 2185229997Sken softc->num_luns--; 2186229997Sken mtx_unlock(&softc->lock); 2187229997Sken 2188229997Sken taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task); 2189229997Sken 2190229997Sken taskqueue_free(be_lun->io_taskqueue); 2191229997Sken 2192229997Sken ctl_be_block_close(be_lun); 2193229997Sken 2194229997Sken if (be_lun->disk_stats != NULL) 2195229997Sken devstat_remove_entry(be_lun->disk_stats); 2196229997Sken 2197229997Sken uma_zdestroy(be_lun->lun_zone); 2198229997Sken 2199229997Sken free(be_lun->dev_path, M_CTLBLK); 2200229997Sken 2201229997Sken free(be_lun, M_CTLBLK); 2202229997Sken 2203229997Sken req->status = CTL_LUN_OK; 2204229997Sken 2205229997Sken return (0); 2206229997Sken 2207229997Skenbailout_error: 2208229997Sken 2209229997Sken req->status = CTL_LUN_ERROR; 2210229997Sken 2211229997Sken return (0); 2212229997Sken} 2213229997Sken 2214232604Straszstatic int 2215232604Straszctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 2216232604Strasz struct ctl_lun_req *req) 2217232604Strasz{ 2218232604Strasz struct vattr vattr; 2219232604Strasz int error; 2220232604Strasz struct ctl_lun_modify_params *params; 2221232604Strasz 2222232604Strasz params = &req->reqdata.modify; 2223232604Strasz 2224232604Strasz if (params->lun_size_bytes != 0) { 2225232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2226232604Strasz } else { 2227232604Strasz error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 2228232604Strasz if (error != 0) { 2229232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2230232604Strasz "error calling VOP_GETATTR() for file %s", 2231232604Strasz be_lun->dev_path); 2232232604Strasz return (error); 2233232604Strasz } 2234232604Strasz 2235232604Strasz be_lun->size_bytes = vattr.va_size; 2236232604Strasz } 2237232604Strasz 2238232604Strasz return (0); 2239232604Strasz} 2240232604Strasz 2241232604Straszstatic int 2242232604Straszctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 2243232604Strasz struct ctl_lun_req *req) 2244232604Strasz{ 2245232604Strasz struct cdev *dev; 2246232604Strasz struct cdevsw *devsw; 2247232604Strasz int error; 2248232604Strasz struct ctl_lun_modify_params *params; 2249232604Strasz uint64_t size_bytes; 2250232604Strasz 2251232604Strasz params = &req->reqdata.modify; 2252232604Strasz 2253232604Strasz dev = be_lun->vn->v_rdev; 2254232604Strasz devsw = dev->si_devsw; 2255232604Strasz if (!devsw->d_ioctl) { 2256232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2257232604Strasz "%s: no d_ioctl for device %s!", __func__, 2258232604Strasz be_lun->dev_path); 2259232604Strasz return (ENODEV); 2260232604Strasz } 2261232604Strasz 2262232604Strasz error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 2263232604Strasz (caddr_t)&size_bytes, FREAD, 2264232604Strasz curthread); 2265232604Strasz if (error) { 2266232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2267232604Strasz "%s: error %d returned for DIOCGMEDIASIZE ioctl " 2268232604Strasz "on %s!", __func__, error, be_lun->dev_path); 2269232604Strasz return (error); 2270232604Strasz } 2271232604Strasz 2272232604Strasz if (params->lun_size_bytes != 0) { 2273232604Strasz if (params->lun_size_bytes > size_bytes) { 2274232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2275232604Strasz "%s: requested LUN size %ju > backing device " 2276232604Strasz "size %ju", __func__, 2277232604Strasz (uintmax_t)params->lun_size_bytes, 2278232604Strasz (uintmax_t)size_bytes); 2279232604Strasz return (EINVAL); 2280232604Strasz } 2281232604Strasz 2282232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2283232604Strasz } else { 2284232604Strasz be_lun->size_bytes = size_bytes; 2285232604Strasz } 2286232604Strasz 2287232604Strasz return (0); 2288232604Strasz} 2289232604Strasz 2290232604Straszstatic int 2291232604Straszctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2292232604Strasz{ 2293232604Strasz struct ctl_lun_modify_params *params; 2294232604Strasz struct ctl_be_block_lun *be_lun; 2295241896Skib int error; 2296232604Strasz 2297232604Strasz params = &req->reqdata.modify; 2298232604Strasz 2299232604Strasz mtx_lock(&softc->lock); 2300232604Strasz 2301232604Strasz be_lun = NULL; 2302232604Strasz 2303232604Strasz STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2304232604Strasz if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2305232604Strasz break; 2306232604Strasz } 2307232604Strasz mtx_unlock(&softc->lock); 2308232604Strasz 2309232604Strasz if (be_lun == NULL) { 2310232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2311232604Strasz "%s: LUN %u is not managed by the block backend", 2312232604Strasz __func__, params->lun_id); 2313232604Strasz goto bailout_error; 2314232604Strasz } 2315232604Strasz 2316232604Strasz if (params->lun_size_bytes != 0) { 2317232604Strasz if (params->lun_size_bytes < be_lun->blocksize) { 2318232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2319232604Strasz "%s: LUN size %ju < blocksize %u", __func__, 2320232604Strasz params->lun_size_bytes, be_lun->blocksize); 2321232604Strasz goto bailout_error; 2322232604Strasz } 2323232604Strasz } 2324232604Strasz 2325232604Strasz vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 2326232604Strasz 2327232604Strasz if (be_lun->vn->v_type == VREG) 2328232604Strasz error = ctl_be_block_modify_file(be_lun, req); 2329232604Strasz else 2330232604Strasz error = ctl_be_block_modify_dev(be_lun, req); 2331232604Strasz 2332232604Strasz VOP_UNLOCK(be_lun->vn, 0); 2333232604Strasz 2334232604Strasz if (error != 0) 2335232604Strasz goto bailout_error; 2336232604Strasz 2337232604Strasz be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 2338232604Strasz 2339232604Strasz /* 2340232604Strasz * The maximum LBA is the size - 1. 2341232604Strasz * 2342232604Strasz * XXX: Note that this field is being updated without locking, 2343232604Strasz * which might cause problems on 32-bit architectures. 2344232604Strasz */ 2345232604Strasz be_lun->ctl_be_lun.maxlba = be_lun->size_blocks - 1; 2346232604Strasz ctl_lun_capacity_changed(&be_lun->ctl_be_lun); 2347232604Strasz 2348232604Strasz /* Tell the user the exact size we ended up using */ 2349232604Strasz params->lun_size_bytes = be_lun->size_bytes; 2350232604Strasz 2351232604Strasz req->status = CTL_LUN_OK; 2352232604Strasz 2353232604Strasz return (0); 2354232604Strasz 2355232604Straszbailout_error: 2356232604Strasz req->status = CTL_LUN_ERROR; 2357232604Strasz 2358232604Strasz return (0); 2359232604Strasz} 2360232604Strasz 2361229997Skenstatic void 2362229997Skenctl_be_block_lun_shutdown(void *be_lun) 2363229997Sken{ 2364229997Sken struct ctl_be_block_lun *lun; 2365229997Sken struct ctl_be_block_softc *softc; 2366229997Sken 2367229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2368229997Sken 2369229997Sken softc = lun->softc; 2370229997Sken 2371229997Sken mtx_lock(&softc->lock); 2372229997Sken lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED; 2373229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2374229997Sken wakeup(lun); 2375229997Sken mtx_unlock(&softc->lock); 2376229997Sken 2377229997Sken} 2378229997Sken 2379229997Skenstatic void 2380229997Skenctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status) 2381229997Sken{ 2382229997Sken struct ctl_be_block_lun *lun; 2383229997Sken struct ctl_be_block_softc *softc; 2384229997Sken 2385229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2386229997Sken softc = lun->softc; 2387229997Sken 2388229997Sken if (status == CTL_LUN_CONFIG_OK) { 2389229997Sken mtx_lock(&softc->lock); 2390229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2391229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2392229997Sken wakeup(lun); 2393229997Sken mtx_unlock(&softc->lock); 2394229997Sken 2395229997Sken /* 2396229997Sken * We successfully added the LUN, attempt to enable it. 2397229997Sken */ 2398229997Sken if (ctl_enable_lun(&lun->ctl_be_lun) != 0) { 2399229997Sken printf("%s: ctl_enable_lun() failed!\n", __func__); 2400229997Sken if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) { 2401229997Sken printf("%s: ctl_invalidate_lun() failed!\n", 2402229997Sken __func__); 2403229997Sken } 2404229997Sken } 2405229997Sken 2406229997Sken return; 2407229997Sken } 2408229997Sken 2409229997Sken 2410229997Sken mtx_lock(&softc->lock); 2411229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2412229997Sken lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR; 2413229997Sken wakeup(lun); 2414229997Sken mtx_unlock(&softc->lock); 2415229997Sken} 2416229997Sken 2417229997Sken 2418229997Skenstatic int 2419229997Skenctl_be_block_config_write(union ctl_io *io) 2420229997Sken{ 2421229997Sken struct ctl_be_block_lun *be_lun; 2422229997Sken struct ctl_be_lun *ctl_be_lun; 2423229997Sken int retval; 2424229997Sken 2425229997Sken retval = 0; 2426229997Sken 2427229997Sken DPRINTF("entered\n"); 2428229997Sken 2429229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2430229997Sken CTL_PRIV_BACKEND_LUN].ptr; 2431229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2432229997Sken 2433229997Sken switch (io->scsiio.cdb[0]) { 2434229997Sken case SYNCHRONIZE_CACHE: 2435229997Sken case SYNCHRONIZE_CACHE_16: 2436264274Smav case WRITE_SAME_10: 2437264274Smav case WRITE_SAME_16: 2438264274Smav case UNMAP: 2439229997Sken /* 2440229997Sken * The upper level CTL code will filter out any CDBs with 2441229997Sken * the immediate bit set and return the proper error. 2442229997Sken * 2443229997Sken * We don't really need to worry about what LBA range the 2444229997Sken * user asked to be synced out. When they issue a sync 2445229997Sken * cache command, we'll sync out the whole thing. 2446229997Sken */ 2447229997Sken mtx_lock(&be_lun->lock); 2448229997Sken STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr, 2449229997Sken links); 2450229997Sken mtx_unlock(&be_lun->lock); 2451229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 2452229997Sken break; 2453229997Sken case START_STOP_UNIT: { 2454229997Sken struct scsi_start_stop_unit *cdb; 2455229997Sken 2456229997Sken cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 2457229997Sken 2458229997Sken if (cdb->how & SSS_START) 2459229997Sken retval = ctl_start_lun(ctl_be_lun); 2460229997Sken else { 2461229997Sken retval = ctl_stop_lun(ctl_be_lun); 2462229997Sken /* 2463229997Sken * XXX KDM Copan-specific offline behavior. 2464229997Sken * Figure out a reasonable way to port this? 2465229997Sken */ 2466229997Sken#ifdef NEEDTOPORT 2467229997Sken if ((retval == 0) 2468229997Sken && (cdb->byte2 & SSS_ONOFFLINE)) 2469229997Sken retval = ctl_lun_offline(ctl_be_lun); 2470229997Sken#endif 2471229997Sken } 2472229997Sken 2473229997Sken /* 2474229997Sken * In general, the above routines should not fail. They 2475229997Sken * just set state for the LUN. So we've got something 2476229997Sken * pretty wrong here if we can't start or stop the LUN. 2477229997Sken */ 2478229997Sken if (retval != 0) { 2479229997Sken ctl_set_internal_failure(&io->scsiio, 2480229997Sken /*sks_valid*/ 1, 2481229997Sken /*retry_count*/ 0xf051); 2482229997Sken retval = CTL_RETVAL_COMPLETE; 2483229997Sken } else { 2484229997Sken ctl_set_success(&io->scsiio); 2485229997Sken } 2486229997Sken ctl_config_write_done(io); 2487229997Sken break; 2488229997Sken } 2489229997Sken default: 2490229997Sken ctl_set_invalid_opcode(&io->scsiio); 2491229997Sken ctl_config_write_done(io); 2492229997Sken retval = CTL_RETVAL_COMPLETE; 2493229997Sken break; 2494229997Sken } 2495229997Sken 2496229997Sken return (retval); 2497229997Sken 2498229997Sken} 2499229997Sken 2500229997Skenstatic int 2501229997Skenctl_be_block_config_read(union ctl_io *io) 2502229997Sken{ 2503229997Sken return (0); 2504229997Sken} 2505229997Sken 2506229997Skenstatic int 2507229997Skenctl_be_block_lun_info(void *be_lun, struct sbuf *sb) 2508229997Sken{ 2509229997Sken struct ctl_be_block_lun *lun; 2510229997Sken int retval; 2511229997Sken 2512229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2513229997Sken retval = 0; 2514229997Sken 2515229997Sken retval = sbuf_printf(sb, "<num_threads>"); 2516229997Sken 2517229997Sken if (retval != 0) 2518229997Sken goto bailout; 2519229997Sken 2520229997Sken retval = sbuf_printf(sb, "%d", lun->num_threads); 2521229997Sken 2522229997Sken if (retval != 0) 2523229997Sken goto bailout; 2524229997Sken 2525229997Sken retval = sbuf_printf(sb, "</num_threads>"); 2526229997Sken 2527229997Sken /* 2528229997Sken * For processor devices, we don't have a path variable. 2529229997Sken */ 2530229997Sken if ((retval != 0) 2531229997Sken || (lun->dev_path == NULL)) 2532229997Sken goto bailout; 2533229997Sken 2534229997Sken retval = sbuf_printf(sb, "<file>"); 2535229997Sken 2536229997Sken if (retval != 0) 2537229997Sken goto bailout; 2538229997Sken 2539229997Sken retval = ctl_sbuf_printf_esc(sb, lun->dev_path); 2540229997Sken 2541229997Sken if (retval != 0) 2542229997Sken goto bailout; 2543229997Sken 2544229997Sken retval = sbuf_printf(sb, "</file>\n"); 2545229997Sken 2546229997Skenbailout: 2547229997Sken 2548229997Sken return (retval); 2549229997Sken} 2550229997Sken 2551229997Skenint 2552229997Skenctl_be_block_init(void) 2553229997Sken{ 2554229997Sken struct ctl_be_block_softc *softc; 2555229997Sken int retval; 2556229997Sken 2557229997Sken softc = &backend_block_softc; 2558229997Sken retval = 0; 2559229997Sken 2560229997Sken mtx_init(&softc->lock, "ctlblk", NULL, MTX_DEF); 2561264020Strasz beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io), 2562264020Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 2563229997Sken STAILQ_INIT(&softc->disk_list); 2564229997Sken STAILQ_INIT(&softc->lun_list); 2565229997Sken 2566229997Sken return (retval); 2567229997Sken} 2568