ctl_backend_block.c revision 264274
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 264274 2014-04-08 20:50:48Z 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; 769264274Smav 770264274Smav dev_data = &be_lun->backend.dev; 771264274Smav while (len > 0) { 772264274Smav bio = g_alloc_bio(); 773264274Smav bio->bio_cmd = BIO_DELETE; 774264274Smav bio->bio_flags |= beio->bio_flags; 775264274Smav bio->bio_dev = dev_data->cdev; 776264274Smav bio->bio_offset = off; 777264274Smav bio->bio_length = MIN(len, LONG_MAX); 778264274Smav bio->bio_data = 0; 779264274Smav bio->bio_done = ctl_be_block_biodone; 780264274Smav bio->bio_caller1 = beio; 781264274Smav bio->bio_pblkno = beio->io_offset / be_lun->blocksize; 782264274Smav 783264274Smav off += bio->bio_length; 784264274Smav len -= bio->bio_length; 785264274Smav 786264274Smav mtx_lock(&be_lun->lock); 787264274Smav beio->num_bios_sent++; 788264274Smav if (last && len == 0) 789264274Smav beio->send_complete = 1; 790264274Smav mtx_unlock(&be_lun->lock); 791264274Smav 792264274Smav (*dev_data->csw->d_strategy)(bio); 793264274Smav } 794264274Smav} 795264274Smav 796264274Smavstatic void 797264274Smavctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 798264274Smav struct ctl_be_block_io *beio) 799264274Smav{ 800264274Smav union ctl_io *io; 801264274Smav struct ctl_be_block_devdata *dev_data; 802264274Smav struct ctl_ptr_len_flags ptrlen; 803264274Smav struct scsi_unmap_desc *buf, *end; 804264274Smav uint64_t len; 805264274Smav 806264274Smav dev_data = &be_lun->backend.dev; 807264274Smav io = beio->io; 808264274Smav 809264274Smav DPRINTF("entered\n"); 810264274Smav 811264274Smav binuptime(&beio->ds_t0); 812264274Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 813264274Smav 814264274Smav if (beio->io_offset == -1) { 815264274Smav beio->io_len = 0; 816264274Smav memcpy(&ptrlen, io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, 817264274Smav sizeof(ptrlen)); 818264274Smav buf = (struct scsi_unmap_desc *)ptrlen.ptr; 819264274Smav end = buf + ptrlen.len / sizeof(*buf); 820264274Smav for (; buf < end; buf++) { 821264274Smav len = (uint64_t)scsi_4btoul(buf->length) * 822264274Smav be_lun->blocksize; 823264274Smav beio->io_len += len; 824264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 825264274Smav scsi_8btou64(buf->lba) * be_lun->blocksize, len, 826264274Smav (end - buf < 32) ? TRUE : FALSE); 827264274Smav } 828264274Smav } else 829264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 830264274Smav beio->io_offset, beio->io_len, TRUE); 831264274Smav} 832264274Smav 833264274Smavstatic void 834229997Skenctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 835229997Sken struct ctl_be_block_io *beio) 836229997Sken{ 837229997Sken int i; 838229997Sken struct bio *bio; 839229997Sken struct ctl_be_block_devdata *dev_data; 840229997Sken off_t cur_offset; 841229997Sken int max_iosize; 842229997Sken 843229997Sken DPRINTF("entered\n"); 844229997Sken 845229997Sken dev_data = &be_lun->backend.dev; 846229997Sken 847229997Sken /* 848229997Sken * We have to limit our I/O size to the maximum supported by the 849229997Sken * backend device. Hopefully it is MAXPHYS. If the driver doesn't 850229997Sken * set it properly, use DFLTPHYS. 851229997Sken */ 852229997Sken max_iosize = dev_data->cdev->si_iosize_max; 853229997Sken if (max_iosize < PAGE_SIZE) 854229997Sken max_iosize = DFLTPHYS; 855229997Sken 856229997Sken cur_offset = beio->io_offset; 857229997Sken 858229997Sken /* 859229997Sken * XXX KDM need to accurately reflect the number of I/Os outstanding 860229997Sken * to a device. 861229997Sken */ 862229997Sken binuptime(&beio->ds_t0); 863229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 864229997Sken 865229997Sken for (i = 0; i < beio->num_segs; i++) { 866229997Sken size_t cur_size; 867229997Sken uint8_t *cur_ptr; 868229997Sken 869229997Sken cur_size = beio->sg_segs[i].len; 870229997Sken cur_ptr = beio->sg_segs[i].addr; 871229997Sken 872229997Sken while (cur_size > 0) { 873229997Sken /* This can't fail, it's a blocking allocation. */ 874229997Sken bio = g_alloc_bio(); 875229997Sken 876229997Sken KASSERT(bio != NULL, ("g_alloc_bio() failed!\n")); 877229997Sken 878229997Sken bio->bio_cmd = beio->bio_cmd; 879229997Sken bio->bio_flags |= beio->bio_flags; 880229997Sken bio->bio_dev = dev_data->cdev; 881229997Sken bio->bio_caller1 = beio; 882229997Sken bio->bio_length = min(cur_size, max_iosize); 883229997Sken bio->bio_offset = cur_offset; 884229997Sken bio->bio_data = cur_ptr; 885229997Sken bio->bio_done = ctl_be_block_biodone; 886229997Sken bio->bio_pblkno = cur_offset / be_lun->blocksize; 887229997Sken 888229997Sken cur_offset += bio->bio_length; 889229997Sken cur_ptr += bio->bio_length; 890229997Sken cur_size -= bio->bio_length; 891229997Sken 892229997Sken /* 893229997Sken * Make sure we set the complete bit just before we 894229997Sken * issue the last bio so we don't wind up with a 895229997Sken * race. 896229997Sken * 897229997Sken * Use the LUN mutex here instead of a combination 898229997Sken * of atomic variables for simplicity. 899229997Sken * 900229997Sken * XXX KDM we could have a per-IO lock, but that 901229997Sken * would cause additional per-IO setup and teardown 902229997Sken * overhead. Hopefully there won't be too much 903229997Sken * contention on the LUN lock. 904229997Sken */ 905229997Sken mtx_lock(&be_lun->lock); 906229997Sken 907229997Sken beio->num_bios_sent++; 908229997Sken 909229997Sken if ((i == beio->num_segs - 1) 910229997Sken && (cur_size == 0)) 911229997Sken beio->send_complete = 1; 912229997Sken 913229997Sken mtx_unlock(&be_lun->lock); 914229997Sken 915229997Sken (*dev_data->csw->d_strategy)(bio); 916229997Sken } 917229997Sken } 918229997Sken} 919229997Sken 920229997Skenstatic void 921264274Smavctl_be_block_cw_done_ws(struct ctl_be_block_io *beio) 922264274Smav{ 923264274Smav union ctl_io *io; 924264274Smav 925264274Smav io = beio->io; 926264274Smav ctl_free_beio(beio); 927264274Smav if (((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE) 928264274Smav && ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 929264274Smav ctl_config_write_done(io); 930264274Smav return; 931264274Smav } 932264274Smav 933264274Smav ctl_be_block_config_write(io); 934264274Smav} 935264274Smav 936264274Smavstatic void 937264274Smavctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun, 938264274Smav union ctl_io *io) 939264274Smav{ 940264274Smav struct ctl_be_block_io *beio; 941264274Smav struct ctl_be_block_softc *softc; 942264274Smav struct ctl_lba_len_flags lbalen; 943264274Smav uint64_t len_left, lba; 944264274Smav int i, seglen; 945264274Smav uint8_t *buf, *end; 946264274Smav 947264274Smav DPRINTF("entered\n"); 948264274Smav 949264274Smav beio = io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr; 950264274Smav softc = be_lun->softc; 951264274Smav memcpy(&lbalen, io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, 952264274Smav sizeof(lbalen)); 953264274Smav 954264274Smav if (lbalen.flags & ~(SWS_LBDATA | SWS_UNMAP) || 955264274Smav (lbalen.flags & SWS_UNMAP && be_lun->unmap == NULL)) { 956264274Smav ctl_free_beio(beio); 957264274Smav ctl_set_invalid_field(&io->scsiio, 958264274Smav /*sks_valid*/ 1, 959264274Smav /*command*/ 1, 960264274Smav /*field*/ 1, 961264274Smav /*bit_valid*/ 0, 962264274Smav /*bit*/ 0); 963264274Smav ctl_config_write_done(io); 964264274Smav return; 965264274Smav } 966264274Smav 967264274Smav /* 968264274Smav * If the I/O came down with an ordered or head of queue tag, set 969264274Smav * the BIO_ORDERED attribute. For head of queue tags, that's 970264274Smav * pretty much the best we can do. 971264274Smav */ 972264274Smav if ((io->scsiio.tag_type == CTL_TAG_ORDERED) 973264274Smav || (io->scsiio.tag_type == CTL_TAG_HEAD_OF_QUEUE)) 974264274Smav beio->bio_flags = BIO_ORDERED; 975264274Smav 976264274Smav switch (io->scsiio.tag_type) { 977264274Smav case CTL_TAG_ORDERED: 978264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 979264274Smav break; 980264274Smav case CTL_TAG_HEAD_OF_QUEUE: 981264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 982264274Smav break; 983264274Smav case CTL_TAG_UNTAGGED: 984264274Smav case CTL_TAG_SIMPLE: 985264274Smav case CTL_TAG_ACA: 986264274Smav default: 987264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 988264274Smav break; 989264274Smav } 990264274Smav 991264274Smav if (lbalen.flags & SWS_UNMAP) { 992264274Smav beio->io_offset = lbalen.lba * be_lun->blocksize; 993264274Smav beio->io_len = (uint64_t)lbalen.len * be_lun->blocksize; 994264274Smav beio->bio_cmd = BIO_DELETE; 995264274Smav beio->ds_trans_type = DEVSTAT_FREE; 996264274Smav 997264274Smav be_lun->unmap(be_lun, beio); 998264274Smav return; 999264274Smav } 1000264274Smav 1001264274Smav beio->bio_cmd = BIO_WRITE; 1002264274Smav beio->ds_trans_type = DEVSTAT_WRITE; 1003264274Smav 1004264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1005264274Smav (uintmax_t)lbalen.lba, lbalen.len); 1006264274Smav 1007264274Smav len_left = (uint64_t)lbalen.len * be_lun->blocksize; 1008264274Smav for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) { 1009264274Smav 1010264274Smav /* 1011264274Smav * Setup the S/G entry for this chunk. 1012264274Smav */ 1013264274Smav seglen = MIN(MAXPHYS, len_left); 1014264274Smav seglen -= seglen % be_lun->blocksize; 1015264274Smav beio->sg_segs[i].len = seglen; 1016264274Smav beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1017264274Smav 1018264274Smav DPRINTF("segment %d addr %p len %zd\n", i, 1019264274Smav beio->sg_segs[i].addr, beio->sg_segs[i].len); 1020264274Smav 1021264274Smav beio->num_segs++; 1022264274Smav len_left -= seglen; 1023264274Smav 1024264274Smav buf = beio->sg_segs[i].addr; 1025264274Smav end = buf + seglen; 1026264274Smav for (; buf < end; buf += be_lun->blocksize) { 1027264274Smav memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize); 1028264274Smav if (lbalen.flags & SWS_LBDATA) 1029264274Smav scsi_ulto4b(lbalen.lba + lba, buf); 1030264274Smav lba++; 1031264274Smav } 1032264274Smav } 1033264274Smav 1034264274Smav beio->io_offset = lbalen.lba * be_lun->blocksize; 1035264274Smav beio->io_len = lba * be_lun->blocksize; 1036264274Smav 1037264274Smav /* We can not do all in one run. Correct and schedule rerun. */ 1038264274Smav if (len_left > 0) { 1039264274Smav lbalen.lba += lba; 1040264274Smav lbalen.len -= lba; 1041264274Smav memcpy(io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, &lbalen, 1042264274Smav sizeof(lbalen)); 1043264274Smav beio->beio_cont = ctl_be_block_cw_done_ws; 1044264274Smav } 1045264274Smav 1046264274Smav be_lun->dispatch(be_lun, beio); 1047264274Smav} 1048264274Smav 1049264274Smavstatic void 1050264274Smavctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun, 1051264274Smav union ctl_io *io) 1052264274Smav{ 1053264274Smav struct ctl_be_block_io *beio; 1054264274Smav struct ctl_be_block_softc *softc; 1055264274Smav struct ctl_ptr_len_flags ptrlen; 1056264274Smav 1057264274Smav DPRINTF("entered\n"); 1058264274Smav 1059264274Smav beio = io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr; 1060264274Smav softc = be_lun->softc; 1061264274Smav memcpy(&ptrlen, io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, 1062264274Smav sizeof(ptrlen)); 1063264274Smav 1064264274Smav if (ptrlen.flags != 0 || be_lun->unmap == NULL) { 1065264274Smav ctl_free_beio(beio); 1066264274Smav ctl_set_invalid_field(&io->scsiio, 1067264274Smav /*sks_valid*/ 0, 1068264274Smav /*command*/ 1, 1069264274Smav /*field*/ 0, 1070264274Smav /*bit_valid*/ 0, 1071264274Smav /*bit*/ 0); 1072264274Smav ctl_config_write_done(io); 1073264274Smav return; 1074264274Smav } 1075264274Smav 1076264274Smav /* 1077264274Smav * If the I/O came down with an ordered or head of queue tag, set 1078264274Smav * the BIO_ORDERED attribute. For head of queue tags, that's 1079264274Smav * pretty much the best we can do. 1080264274Smav */ 1081264274Smav if ((io->scsiio.tag_type == CTL_TAG_ORDERED) 1082264274Smav || (io->scsiio.tag_type == CTL_TAG_HEAD_OF_QUEUE)) 1083264274Smav beio->bio_flags = BIO_ORDERED; 1084264274Smav 1085264274Smav switch (io->scsiio.tag_type) { 1086264274Smav case CTL_TAG_ORDERED: 1087264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1088264274Smav break; 1089264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1090264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1091264274Smav break; 1092264274Smav case CTL_TAG_UNTAGGED: 1093264274Smav case CTL_TAG_SIMPLE: 1094264274Smav case CTL_TAG_ACA: 1095264274Smav default: 1096264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1097264274Smav break; 1098264274Smav } 1099264274Smav 1100264274Smav beio->io_len = 0; 1101264274Smav beio->io_offset = -1; 1102264274Smav 1103264274Smav beio->bio_cmd = BIO_DELETE; 1104264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1105264274Smav 1106264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1107264274Smav (uintmax_t)lbalen.lba, lbalen.len); 1108264274Smav 1109264274Smav be_lun->unmap(be_lun, beio); 1110264274Smav} 1111264274Smav 1112264274Smavstatic void 1113264274Smavctl_be_block_cw_done(struct ctl_be_block_io *beio) 1114264274Smav{ 1115264274Smav union ctl_io *io; 1116264274Smav 1117264274Smav io = beio->io; 1118264274Smav ctl_free_beio(beio); 1119264274Smav ctl_config_write_done(io); 1120264274Smav} 1121264274Smav 1122264274Smavstatic void 1123229997Skenctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 1124229997Sken union ctl_io *io) 1125229997Sken{ 1126229997Sken struct ctl_be_block_io *beio; 1127229997Sken struct ctl_be_block_softc *softc; 1128229997Sken 1129229997Sken DPRINTF("entered\n"); 1130229997Sken 1131229997Sken softc = be_lun->softc; 1132229997Sken beio = ctl_alloc_beio(softc); 1133229997Sken beio->io = io; 1134229997Sken beio->lun = be_lun; 1135264274Smav beio->beio_cont = ctl_be_block_cw_done; 1136229997Sken io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr = beio; 1137229997Sken 1138229997Sken switch (io->scsiio.cdb[0]) { 1139229997Sken case SYNCHRONIZE_CACHE: 1140229997Sken case SYNCHRONIZE_CACHE_16: 1141249194Strasz beio->bio_cmd = BIO_FLUSH; 1142229997Sken beio->ds_trans_type = DEVSTAT_NO_DATA; 1143229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1144229997Sken beio->io_len = 0; 1145229997Sken be_lun->lun_flush(be_lun, beio); 1146229997Sken break; 1147264274Smav case WRITE_SAME_10: 1148264274Smav case WRITE_SAME_16: 1149264274Smav ctl_be_block_cw_dispatch_ws(be_lun, io); 1150264274Smav break; 1151264274Smav case UNMAP: 1152264274Smav ctl_be_block_cw_dispatch_unmap(be_lun, io); 1153264274Smav break; 1154229997Sken default: 1155229997Sken panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1156229997Sken break; 1157229997Sken } 1158229997Sken} 1159229997Sken 1160258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t"); 1161258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t"); 1162258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t"); 1163258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t"); 1164229997Sken 1165229997Skenstatic void 1166229997Skenctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 1167229997Sken union ctl_io *io) 1168229997Sken{ 1169229997Sken struct ctl_be_block_io *beio; 1170229997Sken struct ctl_be_block_softc *softc; 1171229997Sken struct ctl_lba_len lbalen; 1172229997Sken uint64_t len_left, io_size_bytes; 1173229997Sken int i; 1174229997Sken 1175229997Sken softc = be_lun->softc; 1176229997Sken 1177229997Sken DPRINTF("entered\n"); 1178229997Sken 1179229997Sken if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) { 1180229997Sken SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0); 1181229997Sken } else { 1182229997Sken SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0); 1183229997Sken } 1184229997Sken 1185229997Sken memcpy(&lbalen, io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN].bytes, 1186229997Sken sizeof(lbalen)); 1187229997Sken 1188229997Sken io_size_bytes = lbalen.len * be_lun->blocksize; 1189229997Sken 1190229997Sken /* 1191229997Sken * XXX KDM this is temporary, until we implement chaining of beio 1192229997Sken * structures and multiple datamove calls to move all the data in 1193229997Sken * or out. 1194229997Sken */ 1195229997Sken if (io_size_bytes > CTLBLK_MAX_IO_SIZE) { 1196229997Sken printf("%s: IO length %ju > max io size %u\n", __func__, 1197229997Sken io_size_bytes, CTLBLK_MAX_IO_SIZE); 1198229997Sken ctl_set_invalid_field(&io->scsiio, 1199229997Sken /*sks_valid*/ 0, 1200229997Sken /*command*/ 1, 1201229997Sken /*field*/ 0, 1202229997Sken /*bit_valid*/ 0, 1203229997Sken /*bit*/ 0); 1204229997Sken ctl_done(io); 1205229997Sken return; 1206229997Sken } 1207229997Sken 1208229997Sken beio = ctl_alloc_beio(softc); 1209229997Sken beio->io = io; 1210229997Sken beio->lun = be_lun; 1211229997Sken io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr = beio; 1212229997Sken 1213229997Sken /* 1214229997Sken * If the I/O came down with an ordered or head of queue tag, set 1215229997Sken * the BIO_ORDERED attribute. For head of queue tags, that's 1216229997Sken * pretty much the best we can do. 1217229997Sken * 1218229997Sken * XXX KDM we don't have a great way to easily know about the FUA 1219229997Sken * bit right now (it is decoded in ctl_read_write(), but we don't 1220229997Sken * pass that knowledge to the backend), and in any case we would 1221229997Sken * need to determine how to handle it. 1222229997Sken */ 1223229997Sken if ((io->scsiio.tag_type == CTL_TAG_ORDERED) 1224229997Sken || (io->scsiio.tag_type == CTL_TAG_HEAD_OF_QUEUE)) 1225229997Sken beio->bio_flags = BIO_ORDERED; 1226229997Sken 1227229997Sken switch (io->scsiio.tag_type) { 1228229997Sken case CTL_TAG_ORDERED: 1229229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1230229997Sken break; 1231229997Sken case CTL_TAG_HEAD_OF_QUEUE: 1232229997Sken beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1233229997Sken break; 1234229997Sken case CTL_TAG_UNTAGGED: 1235229997Sken case CTL_TAG_SIMPLE: 1236229997Sken case CTL_TAG_ACA: 1237229997Sken default: 1238229997Sken beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1239229997Sken break; 1240229997Sken } 1241229997Sken 1242229997Sken /* 1243229997Sken * This path handles read and write only. The config write path 1244229997Sken * handles flush operations. 1245229997Sken */ 1246229997Sken if ((io->io_hdr.flags & CTL_FLAG_DATA_MASK) == CTL_FLAG_DATA_IN) { 1247229997Sken beio->bio_cmd = BIO_READ; 1248229997Sken beio->ds_trans_type = DEVSTAT_READ; 1249229997Sken } else { 1250229997Sken beio->bio_cmd = BIO_WRITE; 1251229997Sken beio->ds_trans_type = DEVSTAT_WRITE; 1252229997Sken } 1253229997Sken 1254229997Sken beio->io_len = lbalen.len * be_lun->blocksize; 1255229997Sken beio->io_offset = lbalen.lba * be_lun->blocksize; 1256229997Sken 1257229997Sken DPRINTF("%s at LBA %jx len %u\n", 1258229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", 1259229997Sken (uintmax_t)lbalen.lba, lbalen.len); 1260229997Sken 1261229997Sken for (i = 0, len_left = io_size_bytes; i < CTLBLK_MAX_SEGS && 1262229997Sken len_left > 0; i++) { 1263229997Sken 1264229997Sken /* 1265229997Sken * Setup the S/G entry for this chunk. 1266229997Sken */ 1267229997Sken beio->sg_segs[i].len = min(MAXPHYS, len_left); 1268229997Sken beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1269229997Sken 1270229997Sken DPRINTF("segment %d addr %p len %zd\n", i, 1271229997Sken beio->sg_segs[i].addr, beio->sg_segs[i].len); 1272229997Sken 1273229997Sken beio->num_segs++; 1274229997Sken len_left -= beio->sg_segs[i].len; 1275229997Sken } 1276229997Sken 1277229997Sken /* 1278229997Sken * For the read case, we need to read the data into our buffers and 1279229997Sken * then we can send it back to the user. For the write case, we 1280229997Sken * need to get the data from the user first. 1281229997Sken */ 1282229997Sken if (beio->bio_cmd == BIO_READ) { 1283229997Sken SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0); 1284229997Sken be_lun->dispatch(be_lun, beio); 1285229997Sken } else { 1286229997Sken SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0); 1287229997Sken io->scsiio.be_move_done = ctl_be_block_move_done; 1288229997Sken io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 1289229997Sken io->scsiio.kern_data_len = beio->io_len; 1290229997Sken io->scsiio.kern_total_len = beio->io_len; 1291229997Sken io->scsiio.kern_rel_offset = 0; 1292229997Sken io->scsiio.kern_data_resid = 0; 1293229997Sken io->scsiio.kern_sg_entries = beio->num_segs; 1294229997Sken io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 1295229997Sken#ifdef CTL_TIME_IO 1296229997Sken getbintime(&io->io_hdr.dma_start_bt); 1297229997Sken#endif 1298229997Sken ctl_datamove(io); 1299229997Sken } 1300229997Sken} 1301229997Sken 1302229997Skenstatic void 1303229997Skenctl_be_block_worker(void *context, int pending) 1304229997Sken{ 1305229997Sken struct ctl_be_block_lun *be_lun; 1306229997Sken struct ctl_be_block_softc *softc; 1307229997Sken union ctl_io *io; 1308229997Sken 1309229997Sken be_lun = (struct ctl_be_block_lun *)context; 1310229997Sken softc = be_lun->softc; 1311229997Sken 1312229997Sken DPRINTF("entered\n"); 1313229997Sken 1314229997Sken mtx_lock(&be_lun->lock); 1315229997Sken for (;;) { 1316229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue); 1317229997Sken if (io != NULL) { 1318229997Sken struct ctl_be_block_io *beio; 1319229997Sken 1320229997Sken DPRINTF("datamove queue\n"); 1321229997Sken 1322229997Sken STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr, 1323229997Sken ctl_io_hdr, links); 1324229997Sken 1325229997Sken mtx_unlock(&be_lun->lock); 1326229997Sken 1327229997Sken beio = (struct ctl_be_block_io *) 1328229997Sken io->io_hdr.ctl_private[CTL_PRIV_BACKEND].ptr; 1329229997Sken 1330229997Sken be_lun->dispatch(be_lun, beio); 1331229997Sken 1332229997Sken mtx_lock(&be_lun->lock); 1333229997Sken continue; 1334229997Sken } 1335229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue); 1336229997Sken if (io != NULL) { 1337229997Sken 1338229997Sken DPRINTF("config write queue\n"); 1339229997Sken 1340229997Sken STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr, 1341229997Sken ctl_io_hdr, links); 1342229997Sken 1343229997Sken mtx_unlock(&be_lun->lock); 1344229997Sken 1345229997Sken ctl_be_block_cw_dispatch(be_lun, io); 1346229997Sken 1347229997Sken mtx_lock(&be_lun->lock); 1348229997Sken continue; 1349229997Sken } 1350229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue); 1351229997Sken if (io != NULL) { 1352229997Sken DPRINTF("input queue\n"); 1353229997Sken 1354229997Sken STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr, 1355229997Sken ctl_io_hdr, links); 1356229997Sken mtx_unlock(&be_lun->lock); 1357229997Sken 1358229997Sken /* 1359229997Sken * We must drop the lock, since this routine and 1360229997Sken * its children may sleep. 1361229997Sken */ 1362229997Sken ctl_be_block_dispatch(be_lun, io); 1363229997Sken 1364229997Sken mtx_lock(&be_lun->lock); 1365229997Sken continue; 1366229997Sken } 1367229997Sken 1368229997Sken /* 1369229997Sken * If we get here, there is no work left in the queues, so 1370229997Sken * just break out and let the task queue go to sleep. 1371229997Sken */ 1372229997Sken break; 1373229997Sken } 1374229997Sken mtx_unlock(&be_lun->lock); 1375229997Sken} 1376229997Sken 1377229997Sken/* 1378229997Sken * Entry point from CTL to the backend for I/O. We queue everything to a 1379229997Sken * work thread, so this just puts the I/O on a queue and wakes up the 1380229997Sken * thread. 1381229997Sken */ 1382229997Skenstatic int 1383229997Skenctl_be_block_submit(union ctl_io *io) 1384229997Sken{ 1385229997Sken struct ctl_be_block_lun *be_lun; 1386229997Sken struct ctl_be_lun *ctl_be_lun; 1387229997Sken int retval; 1388229997Sken 1389229997Sken DPRINTF("entered\n"); 1390229997Sken 1391229997Sken retval = CTL_RETVAL_COMPLETE; 1392229997Sken 1393229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 1394229997Sken CTL_PRIV_BACKEND_LUN].ptr; 1395229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 1396229997Sken 1397229997Sken /* 1398229997Sken * Make sure we only get SCSI I/O. 1399229997Sken */ 1400229997Sken KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type " 1401229997Sken "%#x) encountered", io->io_hdr.io_type)); 1402229997Sken 1403229997Sken mtx_lock(&be_lun->lock); 1404229997Sken /* 1405229997Sken * XXX KDM make sure that links is okay to use at this point. 1406229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 1407229997Sken * or deal with resource allocation here. 1408229997Sken */ 1409229997Sken STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1410229997Sken mtx_unlock(&be_lun->lock); 1411229997Sken 1412229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1413229997Sken 1414229997Sken return (retval); 1415229997Sken} 1416229997Sken 1417229997Skenstatic int 1418229997Skenctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 1419229997Sken int flag, struct thread *td) 1420229997Sken{ 1421229997Sken struct ctl_be_block_softc *softc; 1422229997Sken int error; 1423229997Sken 1424229997Sken softc = &backend_block_softc; 1425229997Sken 1426229997Sken error = 0; 1427229997Sken 1428229997Sken switch (cmd) { 1429229997Sken case CTL_LUN_REQ: { 1430229997Sken struct ctl_lun_req *lun_req; 1431229997Sken 1432229997Sken lun_req = (struct ctl_lun_req *)addr; 1433229997Sken 1434229997Sken switch (lun_req->reqtype) { 1435229997Sken case CTL_LUNREQ_CREATE: 1436229997Sken error = ctl_be_block_create(softc, lun_req); 1437229997Sken break; 1438229997Sken case CTL_LUNREQ_RM: 1439229997Sken error = ctl_be_block_rm(softc, lun_req); 1440229997Sken break; 1441232604Strasz case CTL_LUNREQ_MODIFY: 1442232604Strasz error = ctl_be_block_modify(softc, lun_req); 1443232604Strasz break; 1444229997Sken default: 1445229997Sken lun_req->status = CTL_LUN_ERROR; 1446229997Sken snprintf(lun_req->error_str, sizeof(lun_req->error_str), 1447229997Sken "%s: invalid LUN request type %d", __func__, 1448229997Sken lun_req->reqtype); 1449229997Sken break; 1450229997Sken } 1451229997Sken break; 1452229997Sken } 1453229997Sken default: 1454229997Sken error = ENOTTY; 1455229997Sken break; 1456229997Sken } 1457229997Sken 1458229997Sken return (error); 1459229997Sken} 1460229997Sken 1461229997Skenstatic int 1462229997Skenctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1463229997Sken{ 1464229997Sken struct ctl_be_block_filedata *file_data; 1465229997Sken struct ctl_lun_create_params *params; 1466229997Sken struct vattr vattr; 1467229997Sken int error; 1468229997Sken 1469229997Sken error = 0; 1470229997Sken file_data = &be_lun->backend.file; 1471229997Sken params = &req->reqdata.create; 1472229997Sken 1473229997Sken be_lun->dev_type = CTL_BE_BLOCK_FILE; 1474229997Sken be_lun->dispatch = ctl_be_block_dispatch_file; 1475229997Sken be_lun->lun_flush = ctl_be_block_flush_file; 1476229997Sken 1477229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 1478229997Sken if (error != 0) { 1479229997Sken snprintf(req->error_str, sizeof(req->error_str), 1480229997Sken "error calling VOP_GETATTR() for file %s", 1481229997Sken be_lun->dev_path); 1482229997Sken return (error); 1483229997Sken } 1484229997Sken 1485229997Sken /* 1486229997Sken * Verify that we have the ability to upgrade to exclusive 1487229997Sken * access on this file so we can trap errors at open instead 1488229997Sken * of reporting them during first access. 1489229997Sken */ 1490229997Sken if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) { 1491229997Sken vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY); 1492229997Sken if (be_lun->vn->v_iflag & VI_DOOMED) { 1493229997Sken error = EBADF; 1494229997Sken snprintf(req->error_str, sizeof(req->error_str), 1495229997Sken "error locking file %s", be_lun->dev_path); 1496229997Sken return (error); 1497229997Sken } 1498229997Sken } 1499229997Sken 1500229997Sken 1501229997Sken file_data->cred = crhold(curthread->td_ucred); 1502232604Strasz if (params->lun_size_bytes != 0) 1503232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1504232604Strasz else 1505232604Strasz be_lun->size_bytes = vattr.va_size; 1506229997Sken /* 1507229997Sken * We set the multi thread flag for file operations because all 1508229997Sken * filesystems (in theory) are capable of allowing multiple readers 1509229997Sken * of a file at once. So we want to get the maximum possible 1510229997Sken * concurrency. 1511229997Sken */ 1512229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD; 1513229997Sken 1514229997Sken /* 1515229997Sken * XXX KDM vattr.va_blocksize may be larger than 512 bytes here. 1516229997Sken * With ZFS, it is 131072 bytes. Block sizes that large don't work 1517229997Sken * with disklabel and UFS on FreeBSD at least. Large block sizes 1518229997Sken * may not work with other OSes as well. So just export a sector 1519229997Sken * size of 512 bytes, which should work with any OS or 1520229997Sken * application. Since our backing is a file, any block size will 1521229997Sken * work fine for the backing store. 1522229997Sken */ 1523229997Sken#if 0 1524229997Sken be_lun->blocksize= vattr.va_blocksize; 1525229997Sken#endif 1526229997Sken if (params->blocksize_bytes != 0) 1527229997Sken be_lun->blocksize = params->blocksize_bytes; 1528229997Sken else 1529229997Sken be_lun->blocksize = 512; 1530229997Sken 1531229997Sken /* 1532229997Sken * Sanity check. The media size has to be at least one 1533229997Sken * sector long. 1534229997Sken */ 1535229997Sken if (be_lun->size_bytes < be_lun->blocksize) { 1536229997Sken error = EINVAL; 1537229997Sken snprintf(req->error_str, sizeof(req->error_str), 1538229997Sken "file %s size %ju < block size %u", be_lun->dev_path, 1539229997Sken (uintmax_t)be_lun->size_bytes, be_lun->blocksize); 1540229997Sken } 1541229997Sken return (error); 1542229997Sken} 1543229997Sken 1544229997Skenstatic int 1545229997Skenctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1546229997Sken{ 1547229997Sken struct ctl_lun_create_params *params; 1548229997Sken struct vattr vattr; 1549229997Sken struct cdev *dev; 1550229997Sken struct cdevsw *devsw; 1551229997Sken int error; 1552264191Smav off_t ps, pss, po, pos; 1553229997Sken 1554229997Sken params = &req->reqdata.create; 1555229997Sken 1556229997Sken be_lun->dev_type = CTL_BE_BLOCK_DEV; 1557229997Sken be_lun->dispatch = ctl_be_block_dispatch_dev; 1558229997Sken be_lun->lun_flush = ctl_be_block_flush_dev; 1559264274Smav be_lun->unmap = ctl_be_block_unmap_dev; 1560229997Sken be_lun->backend.dev.cdev = be_lun->vn->v_rdev; 1561229997Sken be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev, 1562229997Sken &be_lun->backend.dev.dev_ref); 1563229997Sken if (be_lun->backend.dev.csw == NULL) 1564229997Sken panic("Unable to retrieve device switch"); 1565229997Sken 1566229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED); 1567229997Sken if (error) { 1568229997Sken snprintf(req->error_str, sizeof(req->error_str), 1569229997Sken "%s: error getting vnode attributes for device %s", 1570229997Sken __func__, be_lun->dev_path); 1571229997Sken return (error); 1572229997Sken } 1573229997Sken 1574229997Sken dev = be_lun->vn->v_rdev; 1575229997Sken devsw = dev->si_devsw; 1576229997Sken if (!devsw->d_ioctl) { 1577229997Sken snprintf(req->error_str, sizeof(req->error_str), 1578229997Sken "%s: no d_ioctl for device %s!", __func__, 1579229997Sken be_lun->dev_path); 1580229997Sken return (ENODEV); 1581229997Sken } 1582229997Sken 1583229997Sken error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, 1584229997Sken (caddr_t)&be_lun->blocksize, FREAD, 1585229997Sken curthread); 1586229997Sken if (error) { 1587229997Sken snprintf(req->error_str, sizeof(req->error_str), 1588229997Sken "%s: error %d returned for DIOCGSECTORSIZE ioctl " 1589229997Sken "on %s!", __func__, error, be_lun->dev_path); 1590229997Sken return (error); 1591229997Sken } 1592229997Sken 1593229997Sken /* 1594229997Sken * If the user has asked for a blocksize that is greater than the 1595229997Sken * backing device's blocksize, we can do it only if the blocksize 1596229997Sken * the user is asking for is an even multiple of the underlying 1597229997Sken * device's blocksize. 1598229997Sken */ 1599229997Sken if ((params->blocksize_bytes != 0) 1600229997Sken && (params->blocksize_bytes > be_lun->blocksize)) { 1601229997Sken uint32_t bs_multiple, tmp_blocksize; 1602229997Sken 1603229997Sken bs_multiple = params->blocksize_bytes / be_lun->blocksize; 1604229997Sken 1605229997Sken tmp_blocksize = bs_multiple * be_lun->blocksize; 1606229997Sken 1607229997Sken if (tmp_blocksize == params->blocksize_bytes) { 1608229997Sken be_lun->blocksize = params->blocksize_bytes; 1609229997Sken } else { 1610229997Sken snprintf(req->error_str, sizeof(req->error_str), 1611229997Sken "%s: requested blocksize %u is not an even " 1612229997Sken "multiple of backing device blocksize %u", 1613229997Sken __func__, params->blocksize_bytes, 1614229997Sken be_lun->blocksize); 1615229997Sken return (EINVAL); 1616229997Sken 1617229997Sken } 1618229997Sken } else if ((params->blocksize_bytes != 0) 1619229997Sken && (params->blocksize_bytes != be_lun->blocksize)) { 1620229997Sken snprintf(req->error_str, sizeof(req->error_str), 1621229997Sken "%s: requested blocksize %u < backing device " 1622229997Sken "blocksize %u", __func__, params->blocksize_bytes, 1623229997Sken be_lun->blocksize); 1624229997Sken return (EINVAL); 1625229997Sken } 1626229997Sken 1627229997Sken error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 1628229997Sken (caddr_t)&be_lun->size_bytes, FREAD, 1629229997Sken curthread); 1630229997Sken if (error) { 1631229997Sken snprintf(req->error_str, sizeof(req->error_str), 1632232604Strasz "%s: error %d returned for DIOCGMEDIASIZE " 1633232604Strasz " ioctl on %s!", __func__, error, 1634232604Strasz be_lun->dev_path); 1635229997Sken return (error); 1636229997Sken } 1637229997Sken 1638232604Strasz if (params->lun_size_bytes != 0) { 1639232604Strasz if (params->lun_size_bytes > be_lun->size_bytes) { 1640232604Strasz snprintf(req->error_str, sizeof(req->error_str), 1641232604Strasz "%s: requested LUN size %ju > backing device " 1642232604Strasz "size %ju", __func__, 1643232604Strasz (uintmax_t)params->lun_size_bytes, 1644232604Strasz (uintmax_t)be_lun->size_bytes); 1645232604Strasz return (EINVAL); 1646232604Strasz } 1647232604Strasz 1648232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1649232604Strasz } 1650232604Strasz 1651264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE, 1652264191Smav (caddr_t)&ps, FREAD, curthread); 1653264191Smav if (error) 1654264191Smav ps = po = 0; 1655264191Smav else { 1656264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET, 1657264191Smav (caddr_t)&po, FREAD, curthread); 1658264191Smav if (error) 1659264191Smav po = 0; 1660264191Smav } 1661264191Smav pss = ps / be_lun->blocksize; 1662264191Smav pos = po / be_lun->blocksize; 1663264191Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1664264191Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1665264191Smav be_lun->pblockexp = fls(pss) - 1; 1666264191Smav be_lun->pblockoff = (pss - pos) % pss; 1667264191Smav } 1668264191Smav 1669229997Sken return (0); 1670229997Sken} 1671229997Sken 1672229997Skenstatic int 1673229997Skenctl_be_block_close(struct ctl_be_block_lun *be_lun) 1674229997Sken{ 1675229997Sken DROP_GIANT(); 1676229997Sken if (be_lun->vn) { 1677229997Sken int flags = FREAD | FWRITE; 1678229997Sken 1679229997Sken switch (be_lun->dev_type) { 1680229997Sken case CTL_BE_BLOCK_DEV: 1681229997Sken if (be_lun->backend.dev.csw) { 1682229997Sken dev_relthread(be_lun->backend.dev.cdev, 1683229997Sken be_lun->backend.dev.dev_ref); 1684229997Sken be_lun->backend.dev.csw = NULL; 1685229997Sken be_lun->backend.dev.cdev = NULL; 1686229997Sken } 1687229997Sken break; 1688229997Sken case CTL_BE_BLOCK_FILE: 1689229997Sken break; 1690229997Sken case CTL_BE_BLOCK_NONE: 1691258871Strasz break; 1692229997Sken default: 1693229997Sken panic("Unexpected backend type."); 1694229997Sken break; 1695229997Sken } 1696229997Sken 1697229997Sken (void)vn_close(be_lun->vn, flags, NOCRED, curthread); 1698229997Sken be_lun->vn = NULL; 1699229997Sken 1700229997Sken switch (be_lun->dev_type) { 1701229997Sken case CTL_BE_BLOCK_DEV: 1702229997Sken break; 1703229997Sken case CTL_BE_BLOCK_FILE: 1704229997Sken if (be_lun->backend.file.cred != NULL) { 1705229997Sken crfree(be_lun->backend.file.cred); 1706229997Sken be_lun->backend.file.cred = NULL; 1707229997Sken } 1708229997Sken break; 1709229997Sken case CTL_BE_BLOCK_NONE: 1710258871Strasz break; 1711229997Sken default: 1712229997Sken panic("Unexpected backend type."); 1713229997Sken break; 1714229997Sken } 1715229997Sken } 1716229997Sken PICKUP_GIANT(); 1717229997Sken 1718229997Sken return (0); 1719229997Sken} 1720229997Sken 1721229997Skenstatic int 1722229997Skenctl_be_block_open(struct ctl_be_block_softc *softc, 1723229997Sken struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1724229997Sken{ 1725229997Sken struct nameidata nd; 1726229997Sken int flags; 1727229997Sken int error; 1728229997Sken 1729229997Sken /* 1730229997Sken * XXX KDM allow a read-only option? 1731229997Sken */ 1732229997Sken flags = FREAD | FWRITE; 1733229997Sken error = 0; 1734229997Sken 1735229997Sken if (rootvnode == NULL) { 1736229997Sken snprintf(req->error_str, sizeof(req->error_str), 1737229997Sken "%s: Root filesystem is not mounted", __func__); 1738229997Sken return (1); 1739229997Sken } 1740229997Sken 1741229997Sken if (!curthread->td_proc->p_fd->fd_cdir) { 1742229997Sken curthread->td_proc->p_fd->fd_cdir = rootvnode; 1743229997Sken VREF(rootvnode); 1744229997Sken } 1745229997Sken if (!curthread->td_proc->p_fd->fd_rdir) { 1746229997Sken curthread->td_proc->p_fd->fd_rdir = rootvnode; 1747229997Sken VREF(rootvnode); 1748229997Sken } 1749229997Sken if (!curthread->td_proc->p_fd->fd_jdir) { 1750229997Sken curthread->td_proc->p_fd->fd_jdir = rootvnode; 1751229997Sken VREF(rootvnode); 1752229997Sken } 1753229997Sken 1754229997Sken again: 1755229997Sken NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread); 1756229997Sken error = vn_open(&nd, &flags, 0, NULL); 1757229997Sken if (error) { 1758229997Sken /* 1759229997Sken * This is the only reasonable guess we can make as far as 1760229997Sken * path if the user doesn't give us a fully qualified path. 1761229997Sken * If they want to specify a file, they need to specify the 1762229997Sken * full path. 1763229997Sken */ 1764229997Sken if (be_lun->dev_path[0] != '/') { 1765229997Sken char *dev_path = "/dev/"; 1766229997Sken char *dev_name; 1767229997Sken 1768229997Sken /* Try adding device path at beginning of name */ 1769229997Sken dev_name = malloc(strlen(be_lun->dev_path) 1770229997Sken + strlen(dev_path) + 1, 1771229997Sken M_CTLBLK, M_WAITOK); 1772229997Sken if (dev_name) { 1773229997Sken sprintf(dev_name, "%s%s", dev_path, 1774229997Sken be_lun->dev_path); 1775229997Sken free(be_lun->dev_path, M_CTLBLK); 1776229997Sken be_lun->dev_path = dev_name; 1777229997Sken goto again; 1778229997Sken } 1779229997Sken } 1780229997Sken snprintf(req->error_str, sizeof(req->error_str), 1781229997Sken "%s: error opening %s", __func__, be_lun->dev_path); 1782229997Sken return (error); 1783229997Sken } 1784229997Sken 1785229997Sken NDFREE(&nd, NDF_ONLY_PNBUF); 1786229997Sken 1787229997Sken be_lun->vn = nd.ni_vp; 1788229997Sken 1789229997Sken /* We only support disks and files. */ 1790229997Sken if (vn_isdisk(be_lun->vn, &error)) { 1791229997Sken error = ctl_be_block_open_dev(be_lun, req); 1792229997Sken } else if (be_lun->vn->v_type == VREG) { 1793229997Sken error = ctl_be_block_open_file(be_lun, req); 1794229997Sken } else { 1795229997Sken error = EINVAL; 1796229997Sken snprintf(req->error_str, sizeof(req->error_str), 1797258871Strasz "%s is not a disk or plain file", be_lun->dev_path); 1798229997Sken } 1799229997Sken VOP_UNLOCK(be_lun->vn, 0); 1800229997Sken 1801229997Sken if (error != 0) { 1802229997Sken ctl_be_block_close(be_lun); 1803229997Sken return (error); 1804229997Sken } 1805229997Sken 1806229997Sken be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 1807229997Sken be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 1808229997Sken 1809229997Sken return (0); 1810229997Sken} 1811229997Sken 1812229997Skenstatic int 1813229997Skenctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 1814229997Sken{ 1815229997Sken struct ctl_be_block_lun *be_lun; 1816229997Sken struct ctl_lun_create_params *params; 1817229997Sken struct ctl_be_arg *file_arg; 1818229997Sken char tmpstr[32]; 1819264274Smav int retval, num_threads, unmap; 1820229997Sken int i; 1821229997Sken 1822229997Sken params = &req->reqdata.create; 1823229997Sken retval = 0; 1824229997Sken 1825229997Sken num_threads = cbb_num_threads; 1826229997Sken 1827229997Sken file_arg = NULL; 1828229997Sken 1829229997Sken be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK); 1830229997Sken 1831229997Sken be_lun->softc = softc; 1832229997Sken STAILQ_INIT(&be_lun->input_queue); 1833229997Sken STAILQ_INIT(&be_lun->config_write_queue); 1834229997Sken STAILQ_INIT(&be_lun->datamove_queue); 1835254759Strasz STAILQ_INIT(&be_lun->ctl_be_lun.options); 1836229997Sken sprintf(be_lun->lunname, "cblk%d", softc->num_luns); 1837229997Sken mtx_init(&be_lun->lock, be_lun->lunname, NULL, MTX_DEF); 1838229997Sken 1839229997Sken be_lun->lun_zone = uma_zcreate(be_lun->lunname, MAXPHYS, 1840256995Smav NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0); 1841229997Sken 1842229997Sken if (be_lun->lun_zone == NULL) { 1843229997Sken snprintf(req->error_str, sizeof(req->error_str), 1844229997Sken "%s: error allocating UMA zone", __func__); 1845229997Sken goto bailout_error; 1846229997Sken } 1847229997Sken 1848229997Sken if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 1849229997Sken be_lun->ctl_be_lun.lun_type = params->device_type; 1850229997Sken else 1851229997Sken be_lun->ctl_be_lun.lun_type = T_DIRECT; 1852229997Sken 1853229997Sken if (be_lun->ctl_be_lun.lun_type == T_DIRECT) { 1854229997Sken for (i = 0; i < req->num_be_args; i++) { 1855249026Strasz if (strcmp(req->kern_be_args[i].kname, "file") == 0) { 1856229997Sken file_arg = &req->kern_be_args[i]; 1857229997Sken break; 1858229997Sken } 1859229997Sken } 1860229997Sken 1861229997Sken if (file_arg == NULL) { 1862229997Sken snprintf(req->error_str, sizeof(req->error_str), 1863229997Sken "%s: no file argument specified", __func__); 1864229997Sken goto bailout_error; 1865229997Sken } 1866229997Sken 1867229997Sken be_lun->dev_path = malloc(file_arg->vallen, M_CTLBLK, 1868229997Sken M_WAITOK | M_ZERO); 1869229997Sken 1870249026Strasz strlcpy(be_lun->dev_path, (char *)file_arg->kvalue, 1871229997Sken file_arg->vallen); 1872229997Sken 1873229997Sken retval = ctl_be_block_open(softc, be_lun, req); 1874229997Sken if (retval != 0) { 1875229997Sken retval = 0; 1876229997Sken goto bailout_error; 1877229997Sken } 1878229997Sken 1879229997Sken /* 1880229997Sken * Tell the user the size of the file/device. 1881229997Sken */ 1882229997Sken params->lun_size_bytes = be_lun->size_bytes; 1883229997Sken 1884229997Sken /* 1885229997Sken * The maximum LBA is the size - 1. 1886229997Sken */ 1887229997Sken be_lun->ctl_be_lun.maxlba = be_lun->size_blocks - 1; 1888229997Sken } else { 1889229997Sken /* 1890229997Sken * For processor devices, we don't have any size. 1891229997Sken */ 1892229997Sken be_lun->blocksize = 0; 1893264191Smav be_lun->pblockexp = 0; 1894264191Smav be_lun->pblockoff = 0; 1895229997Sken be_lun->size_blocks = 0; 1896229997Sken be_lun->size_bytes = 0; 1897229997Sken be_lun->ctl_be_lun.maxlba = 0; 1898229997Sken params->lun_size_bytes = 0; 1899229997Sken 1900229997Sken /* 1901229997Sken * Default to just 1 thread for processor devices. 1902229997Sken */ 1903229997Sken num_threads = 1; 1904229997Sken } 1905229997Sken 1906229997Sken /* 1907229997Sken * XXX This searching loop might be refactored to be combined with 1908229997Sken * the loop above, 1909229997Sken */ 1910264274Smav unmap = 0; 1911229997Sken for (i = 0; i < req->num_be_args; i++) { 1912249026Strasz if (strcmp(req->kern_be_args[i].kname, "num_threads") == 0) { 1913229997Sken struct ctl_be_arg *thread_arg; 1914229997Sken char num_thread_str[16]; 1915229997Sken int tmp_num_threads; 1916229997Sken 1917229997Sken 1918229997Sken thread_arg = &req->kern_be_args[i]; 1919229997Sken 1920249026Strasz strlcpy(num_thread_str, (char *)thread_arg->kvalue, 1921229997Sken min(thread_arg->vallen, 1922229997Sken sizeof(num_thread_str))); 1923229997Sken 1924229997Sken tmp_num_threads = strtol(num_thread_str, NULL, 0); 1925229997Sken 1926229997Sken /* 1927229997Sken * We don't let the user specify less than one 1928229997Sken * thread, but hope he's clueful enough not to 1929229997Sken * specify 1000 threads. 1930229997Sken */ 1931229997Sken if (tmp_num_threads < 1) { 1932229997Sken snprintf(req->error_str, sizeof(req->error_str), 1933229997Sken "%s: invalid number of threads %s", 1934229997Sken __func__, num_thread_str); 1935229997Sken goto bailout_error; 1936229997Sken } 1937229997Sken 1938229997Sken num_threads = tmp_num_threads; 1939264274Smav } else if (strcmp(req->kern_be_args[i].kname, "unmap") == 0 && 1940264274Smav strcmp(req->kern_be_args[i].kvalue, "on") == 0) { 1941264274Smav unmap = 1; 1942254759Strasz } else if (strcmp(req->kern_be_args[i].kname, "file") != 0 && 1943254759Strasz strcmp(req->kern_be_args[i].kname, "dev") != 0) { 1944254759Strasz struct ctl_be_lun_option *opt; 1945254759Strasz 1946254759Strasz opt = malloc(sizeof(*opt), M_CTLBLK, M_WAITOK); 1947254759Strasz opt->name = malloc(strlen(req->kern_be_args[i].kname) + 1, M_CTLBLK, M_WAITOK); 1948254759Strasz strcpy(opt->name, req->kern_be_args[i].kname); 1949254759Strasz opt->value = malloc(strlen(req->kern_be_args[i].kvalue) + 1, M_CTLBLK, M_WAITOK); 1950254759Strasz strcpy(opt->value, req->kern_be_args[i].kvalue); 1951254759Strasz STAILQ_INSERT_TAIL(&be_lun->ctl_be_lun.options, opt, links); 1952229997Sken } 1953229997Sken } 1954229997Sken 1955229997Sken be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED; 1956229997Sken be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY; 1957264274Smav if (unmap) 1958264274Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 1959229997Sken be_lun->ctl_be_lun.be_lun = be_lun; 1960229997Sken be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 1961264191Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 1962264191Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 1963229997Sken /* Tell the user the blocksize we ended up using */ 1964229997Sken params->blocksize_bytes = be_lun->blocksize; 1965229997Sken if (params->flags & CTL_LUN_FLAG_ID_REQ) { 1966229997Sken be_lun->ctl_be_lun.req_lun_id = params->req_lun_id; 1967229997Sken be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ; 1968229997Sken } else 1969229997Sken be_lun->ctl_be_lun.req_lun_id = 0; 1970229997Sken 1971229997Sken be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown; 1972229997Sken be_lun->ctl_be_lun.lun_config_status = 1973229997Sken ctl_be_block_lun_config_status; 1974229997Sken be_lun->ctl_be_lun.be = &ctl_be_block_driver; 1975229997Sken 1976229997Sken if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 1977229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d", 1978229997Sken softc->num_luns); 1979229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr, 1980229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.serial_num), 1981229997Sken sizeof(tmpstr))); 1982229997Sken 1983229997Sken /* Tell the user what we used for a serial number */ 1984229997Sken strncpy((char *)params->serial_num, tmpstr, 1985229997Sken ctl_min(sizeof(params->serial_num), sizeof(tmpstr))); 1986229997Sken } else { 1987229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, 1988229997Sken params->serial_num, 1989229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.serial_num), 1990229997Sken sizeof(params->serial_num))); 1991229997Sken } 1992229997Sken if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 1993229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns); 1994229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr, 1995229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.device_id), 1996229997Sken sizeof(tmpstr))); 1997229997Sken 1998229997Sken /* Tell the user what we used for a device ID */ 1999229997Sken strncpy((char *)params->device_id, tmpstr, 2000229997Sken ctl_min(sizeof(params->device_id), sizeof(tmpstr))); 2001229997Sken } else { 2002229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, 2003229997Sken params->device_id, 2004229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.device_id), 2005229997Sken sizeof(params->device_id))); 2006229997Sken } 2007229997Sken 2008229997Sken TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun); 2009229997Sken 2010229997Sken be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK, 2011229997Sken taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 2012229997Sken 2013229997Sken if (be_lun->io_taskqueue == NULL) { 2014229997Sken snprintf(req->error_str, sizeof(req->error_str), 2015229997Sken "%s: Unable to create taskqueue", __func__); 2016229997Sken goto bailout_error; 2017229997Sken } 2018229997Sken 2019229997Sken /* 2020229997Sken * Note that we start the same number of threads by default for 2021229997Sken * both the file case and the block device case. For the file 2022229997Sken * case, we need multiple threads to allow concurrency, because the 2023229997Sken * vnode interface is designed to be a blocking interface. For the 2024229997Sken * block device case, ZFS zvols at least will block the caller's 2025229997Sken * context in many instances, and so we need multiple threads to 2026229997Sken * overcome that problem. Other block devices don't need as many 2027229997Sken * threads, but they shouldn't cause too many problems. 2028229997Sken * 2029229997Sken * If the user wants to just have a single thread for a block 2030229997Sken * device, he can specify that when the LUN is created, or change 2031229997Sken * the tunable/sysctl to alter the default number of threads. 2032229997Sken */ 2033229997Sken retval = taskqueue_start_threads(&be_lun->io_taskqueue, 2034229997Sken /*num threads*/num_threads, 2035229997Sken /*priority*/PWAIT, 2036229997Sken /*thread name*/ 2037229997Sken "%s taskq", be_lun->lunname); 2038229997Sken 2039229997Sken if (retval != 0) 2040229997Sken goto bailout_error; 2041229997Sken 2042229997Sken be_lun->num_threads = num_threads; 2043229997Sken 2044229997Sken mtx_lock(&softc->lock); 2045229997Sken softc->num_luns++; 2046229997Sken STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links); 2047229997Sken 2048229997Sken mtx_unlock(&softc->lock); 2049229997Sken 2050229997Sken retval = ctl_add_lun(&be_lun->ctl_be_lun); 2051229997Sken if (retval != 0) { 2052229997Sken mtx_lock(&softc->lock); 2053229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2054229997Sken links); 2055229997Sken softc->num_luns--; 2056229997Sken mtx_unlock(&softc->lock); 2057229997Sken snprintf(req->error_str, sizeof(req->error_str), 2058229997Sken "%s: ctl_add_lun() returned error %d, see dmesg for " 2059229997Sken "details", __func__, retval); 2060229997Sken retval = 0; 2061229997Sken goto bailout_error; 2062229997Sken } 2063229997Sken 2064229997Sken mtx_lock(&softc->lock); 2065229997Sken 2066229997Sken /* 2067229997Sken * Tell the config_status routine that we're waiting so it won't 2068229997Sken * clean up the LUN in the event of an error. 2069229997Sken */ 2070229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2071229997Sken 2072229997Sken while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) { 2073229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2074229997Sken if (retval == EINTR) 2075229997Sken break; 2076229997Sken } 2077229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2078229997Sken 2079229997Sken if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) { 2080229997Sken snprintf(req->error_str, sizeof(req->error_str), 2081229997Sken "%s: LUN configuration error, see dmesg for details", 2082229997Sken __func__); 2083229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2084229997Sken links); 2085229997Sken softc->num_luns--; 2086229997Sken mtx_unlock(&softc->lock); 2087229997Sken goto bailout_error; 2088229997Sken } else { 2089229997Sken params->req_lun_id = be_lun->ctl_be_lun.lun_id; 2090229997Sken } 2091229997Sken 2092229997Sken mtx_unlock(&softc->lock); 2093229997Sken 2094229997Sken be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id, 2095229997Sken be_lun->blocksize, 2096229997Sken DEVSTAT_ALL_SUPPORTED, 2097229997Sken be_lun->ctl_be_lun.lun_type 2098229997Sken | DEVSTAT_TYPE_IF_OTHER, 2099229997Sken DEVSTAT_PRIORITY_OTHER); 2100229997Sken 2101229997Sken 2102229997Sken req->status = CTL_LUN_OK; 2103229997Sken 2104229997Sken return (retval); 2105229997Sken 2106229997Skenbailout_error: 2107229997Sken req->status = CTL_LUN_ERROR; 2108229997Sken 2109229997Sken ctl_be_block_close(be_lun); 2110229997Sken 2111229997Sken free(be_lun->dev_path, M_CTLBLK); 2112229997Sken free(be_lun, M_CTLBLK); 2113229997Sken 2114229997Sken return (retval); 2115229997Sken} 2116229997Sken 2117229997Skenstatic int 2118229997Skenctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2119229997Sken{ 2120229997Sken struct ctl_lun_rm_params *params; 2121229997Sken struct ctl_be_block_lun *be_lun; 2122229997Sken int retval; 2123229997Sken 2124229997Sken params = &req->reqdata.rm; 2125229997Sken 2126229997Sken mtx_lock(&softc->lock); 2127229997Sken 2128229997Sken be_lun = NULL; 2129229997Sken 2130229997Sken STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2131229997Sken if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2132229997Sken break; 2133229997Sken } 2134229997Sken mtx_unlock(&softc->lock); 2135229997Sken 2136229997Sken if (be_lun == NULL) { 2137229997Sken snprintf(req->error_str, sizeof(req->error_str), 2138229997Sken "%s: LUN %u is not managed by the block backend", 2139229997Sken __func__, params->lun_id); 2140229997Sken goto bailout_error; 2141229997Sken } 2142229997Sken 2143229997Sken retval = ctl_disable_lun(&be_lun->ctl_be_lun); 2144229997Sken 2145229997Sken if (retval != 0) { 2146229997Sken snprintf(req->error_str, sizeof(req->error_str), 2147229997Sken "%s: error %d returned from ctl_disable_lun() for " 2148229997Sken "LUN %d", __func__, retval, params->lun_id); 2149229997Sken goto bailout_error; 2150229997Sken 2151229997Sken } 2152229997Sken 2153229997Sken retval = ctl_invalidate_lun(&be_lun->ctl_be_lun); 2154229997Sken if (retval != 0) { 2155229997Sken snprintf(req->error_str, sizeof(req->error_str), 2156229997Sken "%s: error %d returned from ctl_invalidate_lun() for " 2157229997Sken "LUN %d", __func__, retval, params->lun_id); 2158229997Sken goto bailout_error; 2159229997Sken } 2160229997Sken 2161229997Sken mtx_lock(&softc->lock); 2162229997Sken 2163229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2164229997Sken 2165229997Sken while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2166229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2167229997Sken if (retval == EINTR) 2168229997Sken break; 2169229997Sken } 2170229997Sken 2171229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2172229997Sken 2173229997Sken if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2174229997Sken snprintf(req->error_str, sizeof(req->error_str), 2175229997Sken "%s: interrupted waiting for LUN to be freed", 2176229997Sken __func__); 2177229997Sken mtx_unlock(&softc->lock); 2178229997Sken goto bailout_error; 2179229997Sken } 2180229997Sken 2181229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links); 2182229997Sken 2183229997Sken softc->num_luns--; 2184229997Sken mtx_unlock(&softc->lock); 2185229997Sken 2186229997Sken taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task); 2187229997Sken 2188229997Sken taskqueue_free(be_lun->io_taskqueue); 2189229997Sken 2190229997Sken ctl_be_block_close(be_lun); 2191229997Sken 2192229997Sken if (be_lun->disk_stats != NULL) 2193229997Sken devstat_remove_entry(be_lun->disk_stats); 2194229997Sken 2195229997Sken uma_zdestroy(be_lun->lun_zone); 2196229997Sken 2197229997Sken free(be_lun->dev_path, M_CTLBLK); 2198229997Sken 2199229997Sken free(be_lun, M_CTLBLK); 2200229997Sken 2201229997Sken req->status = CTL_LUN_OK; 2202229997Sken 2203229997Sken return (0); 2204229997Sken 2205229997Skenbailout_error: 2206229997Sken 2207229997Sken req->status = CTL_LUN_ERROR; 2208229997Sken 2209229997Sken return (0); 2210229997Sken} 2211229997Sken 2212232604Straszstatic int 2213232604Straszctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 2214232604Strasz struct ctl_lun_req *req) 2215232604Strasz{ 2216232604Strasz struct vattr vattr; 2217232604Strasz int error; 2218232604Strasz struct ctl_lun_modify_params *params; 2219232604Strasz 2220232604Strasz params = &req->reqdata.modify; 2221232604Strasz 2222232604Strasz if (params->lun_size_bytes != 0) { 2223232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2224232604Strasz } else { 2225232604Strasz error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 2226232604Strasz if (error != 0) { 2227232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2228232604Strasz "error calling VOP_GETATTR() for file %s", 2229232604Strasz be_lun->dev_path); 2230232604Strasz return (error); 2231232604Strasz } 2232232604Strasz 2233232604Strasz be_lun->size_bytes = vattr.va_size; 2234232604Strasz } 2235232604Strasz 2236232604Strasz return (0); 2237232604Strasz} 2238232604Strasz 2239232604Straszstatic int 2240232604Straszctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 2241232604Strasz struct ctl_lun_req *req) 2242232604Strasz{ 2243232604Strasz struct cdev *dev; 2244232604Strasz struct cdevsw *devsw; 2245232604Strasz int error; 2246232604Strasz struct ctl_lun_modify_params *params; 2247232604Strasz uint64_t size_bytes; 2248232604Strasz 2249232604Strasz params = &req->reqdata.modify; 2250232604Strasz 2251232604Strasz dev = be_lun->vn->v_rdev; 2252232604Strasz devsw = dev->si_devsw; 2253232604Strasz if (!devsw->d_ioctl) { 2254232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2255232604Strasz "%s: no d_ioctl for device %s!", __func__, 2256232604Strasz be_lun->dev_path); 2257232604Strasz return (ENODEV); 2258232604Strasz } 2259232604Strasz 2260232604Strasz error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 2261232604Strasz (caddr_t)&size_bytes, FREAD, 2262232604Strasz curthread); 2263232604Strasz if (error) { 2264232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2265232604Strasz "%s: error %d returned for DIOCGMEDIASIZE ioctl " 2266232604Strasz "on %s!", __func__, error, be_lun->dev_path); 2267232604Strasz return (error); 2268232604Strasz } 2269232604Strasz 2270232604Strasz if (params->lun_size_bytes != 0) { 2271232604Strasz if (params->lun_size_bytes > size_bytes) { 2272232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2273232604Strasz "%s: requested LUN size %ju > backing device " 2274232604Strasz "size %ju", __func__, 2275232604Strasz (uintmax_t)params->lun_size_bytes, 2276232604Strasz (uintmax_t)size_bytes); 2277232604Strasz return (EINVAL); 2278232604Strasz } 2279232604Strasz 2280232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2281232604Strasz } else { 2282232604Strasz be_lun->size_bytes = size_bytes; 2283232604Strasz } 2284232604Strasz 2285232604Strasz return (0); 2286232604Strasz} 2287232604Strasz 2288232604Straszstatic int 2289232604Straszctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2290232604Strasz{ 2291232604Strasz struct ctl_lun_modify_params *params; 2292232604Strasz struct ctl_be_block_lun *be_lun; 2293241896Skib int error; 2294232604Strasz 2295232604Strasz params = &req->reqdata.modify; 2296232604Strasz 2297232604Strasz mtx_lock(&softc->lock); 2298232604Strasz 2299232604Strasz be_lun = NULL; 2300232604Strasz 2301232604Strasz STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2302232604Strasz if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2303232604Strasz break; 2304232604Strasz } 2305232604Strasz mtx_unlock(&softc->lock); 2306232604Strasz 2307232604Strasz if (be_lun == NULL) { 2308232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2309232604Strasz "%s: LUN %u is not managed by the block backend", 2310232604Strasz __func__, params->lun_id); 2311232604Strasz goto bailout_error; 2312232604Strasz } 2313232604Strasz 2314232604Strasz if (params->lun_size_bytes != 0) { 2315232604Strasz if (params->lun_size_bytes < be_lun->blocksize) { 2316232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2317232604Strasz "%s: LUN size %ju < blocksize %u", __func__, 2318232604Strasz params->lun_size_bytes, be_lun->blocksize); 2319232604Strasz goto bailout_error; 2320232604Strasz } 2321232604Strasz } 2322232604Strasz 2323232604Strasz vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 2324232604Strasz 2325232604Strasz if (be_lun->vn->v_type == VREG) 2326232604Strasz error = ctl_be_block_modify_file(be_lun, req); 2327232604Strasz else 2328232604Strasz error = ctl_be_block_modify_dev(be_lun, req); 2329232604Strasz 2330232604Strasz VOP_UNLOCK(be_lun->vn, 0); 2331232604Strasz 2332232604Strasz if (error != 0) 2333232604Strasz goto bailout_error; 2334232604Strasz 2335232604Strasz be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 2336232604Strasz 2337232604Strasz /* 2338232604Strasz * The maximum LBA is the size - 1. 2339232604Strasz * 2340232604Strasz * XXX: Note that this field is being updated without locking, 2341232604Strasz * which might cause problems on 32-bit architectures. 2342232604Strasz */ 2343232604Strasz be_lun->ctl_be_lun.maxlba = be_lun->size_blocks - 1; 2344232604Strasz ctl_lun_capacity_changed(&be_lun->ctl_be_lun); 2345232604Strasz 2346232604Strasz /* Tell the user the exact size we ended up using */ 2347232604Strasz params->lun_size_bytes = be_lun->size_bytes; 2348232604Strasz 2349232604Strasz req->status = CTL_LUN_OK; 2350232604Strasz 2351232604Strasz return (0); 2352232604Strasz 2353232604Straszbailout_error: 2354232604Strasz req->status = CTL_LUN_ERROR; 2355232604Strasz 2356232604Strasz return (0); 2357232604Strasz} 2358232604Strasz 2359229997Skenstatic void 2360229997Skenctl_be_block_lun_shutdown(void *be_lun) 2361229997Sken{ 2362229997Sken struct ctl_be_block_lun *lun; 2363229997Sken struct ctl_be_block_softc *softc; 2364229997Sken 2365229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2366229997Sken 2367229997Sken softc = lun->softc; 2368229997Sken 2369229997Sken mtx_lock(&softc->lock); 2370229997Sken lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED; 2371229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2372229997Sken wakeup(lun); 2373229997Sken mtx_unlock(&softc->lock); 2374229997Sken 2375229997Sken} 2376229997Sken 2377229997Skenstatic void 2378229997Skenctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status) 2379229997Sken{ 2380229997Sken struct ctl_be_block_lun *lun; 2381229997Sken struct ctl_be_block_softc *softc; 2382229997Sken 2383229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2384229997Sken softc = lun->softc; 2385229997Sken 2386229997Sken if (status == CTL_LUN_CONFIG_OK) { 2387229997Sken mtx_lock(&softc->lock); 2388229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2389229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2390229997Sken wakeup(lun); 2391229997Sken mtx_unlock(&softc->lock); 2392229997Sken 2393229997Sken /* 2394229997Sken * We successfully added the LUN, attempt to enable it. 2395229997Sken */ 2396229997Sken if (ctl_enable_lun(&lun->ctl_be_lun) != 0) { 2397229997Sken printf("%s: ctl_enable_lun() failed!\n", __func__); 2398229997Sken if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) { 2399229997Sken printf("%s: ctl_invalidate_lun() failed!\n", 2400229997Sken __func__); 2401229997Sken } 2402229997Sken } 2403229997Sken 2404229997Sken return; 2405229997Sken } 2406229997Sken 2407229997Sken 2408229997Sken mtx_lock(&softc->lock); 2409229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2410229997Sken lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR; 2411229997Sken wakeup(lun); 2412229997Sken mtx_unlock(&softc->lock); 2413229997Sken} 2414229997Sken 2415229997Sken 2416229997Skenstatic int 2417229997Skenctl_be_block_config_write(union ctl_io *io) 2418229997Sken{ 2419229997Sken struct ctl_be_block_lun *be_lun; 2420229997Sken struct ctl_be_lun *ctl_be_lun; 2421229997Sken int retval; 2422229997Sken 2423229997Sken retval = 0; 2424229997Sken 2425229997Sken DPRINTF("entered\n"); 2426229997Sken 2427229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2428229997Sken CTL_PRIV_BACKEND_LUN].ptr; 2429229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2430229997Sken 2431229997Sken switch (io->scsiio.cdb[0]) { 2432229997Sken case SYNCHRONIZE_CACHE: 2433229997Sken case SYNCHRONIZE_CACHE_16: 2434264274Smav case WRITE_SAME_10: 2435264274Smav case WRITE_SAME_16: 2436264274Smav case UNMAP: 2437229997Sken /* 2438229997Sken * The upper level CTL code will filter out any CDBs with 2439229997Sken * the immediate bit set and return the proper error. 2440229997Sken * 2441229997Sken * We don't really need to worry about what LBA range the 2442229997Sken * user asked to be synced out. When they issue a sync 2443229997Sken * cache command, we'll sync out the whole thing. 2444229997Sken */ 2445229997Sken mtx_lock(&be_lun->lock); 2446229997Sken STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr, 2447229997Sken links); 2448229997Sken mtx_unlock(&be_lun->lock); 2449229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 2450229997Sken break; 2451229997Sken case START_STOP_UNIT: { 2452229997Sken struct scsi_start_stop_unit *cdb; 2453229997Sken 2454229997Sken cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 2455229997Sken 2456229997Sken if (cdb->how & SSS_START) 2457229997Sken retval = ctl_start_lun(ctl_be_lun); 2458229997Sken else { 2459229997Sken retval = ctl_stop_lun(ctl_be_lun); 2460229997Sken /* 2461229997Sken * XXX KDM Copan-specific offline behavior. 2462229997Sken * Figure out a reasonable way to port this? 2463229997Sken */ 2464229997Sken#ifdef NEEDTOPORT 2465229997Sken if ((retval == 0) 2466229997Sken && (cdb->byte2 & SSS_ONOFFLINE)) 2467229997Sken retval = ctl_lun_offline(ctl_be_lun); 2468229997Sken#endif 2469229997Sken } 2470229997Sken 2471229997Sken /* 2472229997Sken * In general, the above routines should not fail. They 2473229997Sken * just set state for the LUN. So we've got something 2474229997Sken * pretty wrong here if we can't start or stop the LUN. 2475229997Sken */ 2476229997Sken if (retval != 0) { 2477229997Sken ctl_set_internal_failure(&io->scsiio, 2478229997Sken /*sks_valid*/ 1, 2479229997Sken /*retry_count*/ 0xf051); 2480229997Sken retval = CTL_RETVAL_COMPLETE; 2481229997Sken } else { 2482229997Sken ctl_set_success(&io->scsiio); 2483229997Sken } 2484229997Sken ctl_config_write_done(io); 2485229997Sken break; 2486229997Sken } 2487229997Sken default: 2488229997Sken ctl_set_invalid_opcode(&io->scsiio); 2489229997Sken ctl_config_write_done(io); 2490229997Sken retval = CTL_RETVAL_COMPLETE; 2491229997Sken break; 2492229997Sken } 2493229997Sken 2494229997Sken return (retval); 2495229997Sken 2496229997Sken} 2497229997Sken 2498229997Skenstatic int 2499229997Skenctl_be_block_config_read(union ctl_io *io) 2500229997Sken{ 2501229997Sken return (0); 2502229997Sken} 2503229997Sken 2504229997Skenstatic int 2505229997Skenctl_be_block_lun_info(void *be_lun, struct sbuf *sb) 2506229997Sken{ 2507229997Sken struct ctl_be_block_lun *lun; 2508229997Sken int retval; 2509229997Sken 2510229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2511229997Sken retval = 0; 2512229997Sken 2513229997Sken retval = sbuf_printf(sb, "<num_threads>"); 2514229997Sken 2515229997Sken if (retval != 0) 2516229997Sken goto bailout; 2517229997Sken 2518229997Sken retval = sbuf_printf(sb, "%d", lun->num_threads); 2519229997Sken 2520229997Sken if (retval != 0) 2521229997Sken goto bailout; 2522229997Sken 2523229997Sken retval = sbuf_printf(sb, "</num_threads>"); 2524229997Sken 2525229997Sken /* 2526229997Sken * For processor devices, we don't have a path variable. 2527229997Sken */ 2528229997Sken if ((retval != 0) 2529229997Sken || (lun->dev_path == NULL)) 2530229997Sken goto bailout; 2531229997Sken 2532229997Sken retval = sbuf_printf(sb, "<file>"); 2533229997Sken 2534229997Sken if (retval != 0) 2535229997Sken goto bailout; 2536229997Sken 2537229997Sken retval = ctl_sbuf_printf_esc(sb, lun->dev_path); 2538229997Sken 2539229997Sken if (retval != 0) 2540229997Sken goto bailout; 2541229997Sken 2542229997Sken retval = sbuf_printf(sb, "</file>\n"); 2543229997Sken 2544229997Skenbailout: 2545229997Sken 2546229997Sken return (retval); 2547229997Sken} 2548229997Sken 2549229997Skenint 2550229997Skenctl_be_block_init(void) 2551229997Sken{ 2552229997Sken struct ctl_be_block_softc *softc; 2553229997Sken int retval; 2554229997Sken 2555229997Sken softc = &backend_block_softc; 2556229997Sken retval = 0; 2557229997Sken 2558229997Sken mtx_init(&softc->lock, "ctlblk", NULL, MTX_DEF); 2559264020Strasz beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io), 2560264020Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 2561229997Sken STAILQ_INIT(&softc->disk_list); 2562229997Sken STAILQ_INIT(&softc->lun_list); 2563229997Sken 2564229997Sken return (retval); 2565229997Sken} 2566