ctl_backend_block.c revision 273029
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 273029 2014-10-13 11:00:58Z 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/* 92264886Smav * The idea here is that we'll allocate enough S/G space to hold a 1MB 93264886Smav * I/O. If we get an I/O larger than that, we'll split it. 94229997Sken */ 95267537Smav#define CTLBLK_HALF_IO_SIZE (512 * 1024) 96267537Smav#define CTLBLK_MAX_IO_SIZE (CTLBLK_HALF_IO_SIZE * 2) 97264886Smav#define CTLBLK_MAX_SEG MAXPHYS 98267537Smav#define CTLBLK_HALF_SEGS MAX(CTLBLK_HALF_IO_SIZE / CTLBLK_MAX_SEG, 1) 99267537Smav#define CTLBLK_MAX_SEGS (CTLBLK_HALF_SEGS * 2) 100229997Sken 101229997Sken#ifdef CTLBLK_DEBUG 102229997Sken#define DPRINTF(fmt, args...) \ 103229997Sken printf("cbb(%s:%d): " fmt, __FUNCTION__, __LINE__, ##args) 104229997Sken#else 105229997Sken#define DPRINTF(fmt, args...) do {} while(0) 106229997Sken#endif 107229997Sken 108267519Smav#define PRIV(io) \ 109267519Smav ((struct ctl_ptr_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_BACKEND]) 110267537Smav#define ARGS(io) \ 111267537Smav ((struct ctl_lba_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]) 112267519Smav 113229997SkenSDT_PROVIDER_DEFINE(cbb); 114229997Sken 115229997Skentypedef enum { 116229997Sken CTL_BE_BLOCK_LUN_UNCONFIGURED = 0x01, 117229997Sken CTL_BE_BLOCK_LUN_CONFIG_ERR = 0x02, 118229997Sken CTL_BE_BLOCK_LUN_WAITING = 0x04, 119229997Sken CTL_BE_BLOCK_LUN_MULTI_THREAD = 0x08 120229997Sken} ctl_be_block_lun_flags; 121229997Sken 122229997Skentypedef enum { 123229997Sken CTL_BE_BLOCK_NONE, 124229997Sken CTL_BE_BLOCK_DEV, 125229997Sken CTL_BE_BLOCK_FILE 126229997Sken} ctl_be_block_type; 127229997Sken 128229997Skenstruct ctl_be_block_devdata { 129229997Sken struct cdev *cdev; 130229997Sken struct cdevsw *csw; 131229997Sken int dev_ref; 132229997Sken}; 133229997Sken 134229997Skenstruct ctl_be_block_filedata { 135229997Sken struct ucred *cred; 136229997Sken}; 137229997Sken 138229997Skenunion ctl_be_block_bedata { 139229997Sken struct ctl_be_block_devdata dev; 140229997Sken struct ctl_be_block_filedata file; 141229997Sken}; 142229997Sken 143229997Skenstruct ctl_be_block_io; 144229997Skenstruct ctl_be_block_lun; 145229997Sken 146229997Skentypedef void (*cbb_dispatch_t)(struct ctl_be_block_lun *be_lun, 147229997Sken struct ctl_be_block_io *beio); 148229997Sken 149229997Sken/* 150229997Sken * Backend LUN structure. There is a 1:1 mapping between a block device 151229997Sken * and a backend block LUN, and between a backend block LUN and a CTL LUN. 152229997Sken */ 153229997Skenstruct ctl_be_block_lun { 154272911Smav struct ctl_lun_create_params params; 155229997Sken struct ctl_block_disk *disk; 156229997Sken char lunname[32]; 157229997Sken char *dev_path; 158229997Sken ctl_be_block_type dev_type; 159229997Sken struct vnode *vn; 160229997Sken union ctl_be_block_bedata backend; 161229997Sken cbb_dispatch_t dispatch; 162229997Sken cbb_dispatch_t lun_flush; 163264274Smav cbb_dispatch_t unmap; 164229997Sken uma_zone_t lun_zone; 165229997Sken uint64_t size_blocks; 166229997Sken uint64_t size_bytes; 167229997Sken uint32_t blocksize; 168229997Sken int blocksize_shift; 169264191Smav uint16_t pblockexp; 170264191Smav uint16_t pblockoff; 171229997Sken struct ctl_be_block_softc *softc; 172229997Sken struct devstat *disk_stats; 173229997Sken ctl_be_block_lun_flags flags; 174229997Sken STAILQ_ENTRY(ctl_be_block_lun) links; 175229997Sken struct ctl_be_lun ctl_be_lun; 176229997Sken struct taskqueue *io_taskqueue; 177229997Sken struct task io_task; 178229997Sken int num_threads; 179229997Sken STAILQ_HEAD(, ctl_io_hdr) input_queue; 180229997Sken STAILQ_HEAD(, ctl_io_hdr) config_write_queue; 181229997Sken STAILQ_HEAD(, ctl_io_hdr) datamove_queue; 182267877Smav struct mtx_padalign io_lock; 183267877Smav struct mtx_padalign queue_lock; 184229997Sken}; 185229997Sken 186229997Sken/* 187229997Sken * Overall softc structure for the block backend module. 188229997Sken */ 189229997Skenstruct ctl_be_block_softc { 190229997Sken struct mtx lock; 191229997Sken int num_disks; 192229997Sken STAILQ_HEAD(, ctl_block_disk) disk_list; 193229997Sken int num_luns; 194229997Sken STAILQ_HEAD(, ctl_be_block_lun) lun_list; 195229997Sken}; 196229997Sken 197229997Skenstatic struct ctl_be_block_softc backend_block_softc; 198229997Sken 199229997Sken/* 200229997Sken * Per-I/O information. 201229997Sken */ 202229997Skenstruct ctl_be_block_io { 203229997Sken union ctl_io *io; 204229997Sken struct ctl_sg_entry sg_segs[CTLBLK_MAX_SEGS]; 205229997Sken struct iovec xiovecs[CTLBLK_MAX_SEGS]; 206229997Sken int bio_cmd; 207229997Sken int num_segs; 208229997Sken int num_bios_sent; 209229997Sken int num_bios_done; 210229997Sken int send_complete; 211229997Sken int num_errors; 212229997Sken struct bintime ds_t0; 213229997Sken devstat_tag_type ds_tag_type; 214229997Sken devstat_trans_flags ds_trans_type; 215229997Sken uint64_t io_len; 216229997Sken uint64_t io_offset; 217229997Sken struct ctl_be_block_softc *softc; 218229997Sken struct ctl_be_block_lun *lun; 219264274Smav void (*beio_cont)(struct ctl_be_block_io *beio); /* to continue processing */ 220229997Sken}; 221229997Sken 222229997Skenstatic int cbb_num_threads = 14; 223229997SkenSYSCTL_NODE(_kern_cam_ctl, OID_AUTO, block, CTLFLAG_RD, 0, 224229997Sken "CAM Target Layer Block Backend"); 225267992ShselaskySYSCTL_INT(_kern_cam_ctl_block, OID_AUTO, num_threads, CTLFLAG_RWTUN, 226229997Sken &cbb_num_threads, 0, "Number of threads per backing file"); 227229997Sken 228229997Skenstatic struct ctl_be_block_io *ctl_alloc_beio(struct ctl_be_block_softc *softc); 229229997Skenstatic void ctl_free_beio(struct ctl_be_block_io *beio); 230229997Skenstatic void ctl_complete_beio(struct ctl_be_block_io *beio); 231229997Skenstatic int ctl_be_block_move_done(union ctl_io *io); 232229997Skenstatic void ctl_be_block_biodone(struct bio *bio); 233229997Skenstatic void ctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 234229997Sken struct ctl_be_block_io *beio); 235229997Skenstatic void ctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 236229997Sken struct ctl_be_block_io *beio); 237229997Skenstatic void ctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 238229997Sken struct ctl_be_block_io *beio); 239264274Smavstatic void ctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 240264274Smav struct ctl_be_block_io *beio); 241229997Skenstatic void ctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 242229997Sken struct ctl_be_block_io *beio); 243229997Skenstatic void ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 244229997Sken union ctl_io *io); 245229997Skenstatic void ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 246229997Sken union ctl_io *io); 247229997Skenstatic void ctl_be_block_worker(void *context, int pending); 248229997Skenstatic int ctl_be_block_submit(union ctl_io *io); 249229997Skenstatic int ctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 250229997Sken int flag, struct thread *td); 251229997Skenstatic int ctl_be_block_open_file(struct ctl_be_block_lun *be_lun, 252229997Sken struct ctl_lun_req *req); 253229997Skenstatic int ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, 254229997Sken struct ctl_lun_req *req); 255229997Skenstatic int ctl_be_block_close(struct ctl_be_block_lun *be_lun); 256229997Skenstatic int ctl_be_block_open(struct ctl_be_block_softc *softc, 257229997Sken struct ctl_be_block_lun *be_lun, 258229997Sken struct ctl_lun_req *req); 259229997Skenstatic int ctl_be_block_create(struct ctl_be_block_softc *softc, 260229997Sken struct ctl_lun_req *req); 261229997Skenstatic int ctl_be_block_rm(struct ctl_be_block_softc *softc, 262229997Sken struct ctl_lun_req *req); 263232604Straszstatic int ctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 264232604Strasz struct ctl_lun_req *req); 265232604Straszstatic int ctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 266232604Strasz struct ctl_lun_req *req); 267232604Straszstatic int ctl_be_block_modify(struct ctl_be_block_softc *softc, 268232604Strasz struct ctl_lun_req *req); 269229997Skenstatic void ctl_be_block_lun_shutdown(void *be_lun); 270229997Skenstatic void ctl_be_block_lun_config_status(void *be_lun, 271229997Sken ctl_lun_config_status status); 272229997Skenstatic int ctl_be_block_config_write(union ctl_io *io); 273229997Skenstatic int ctl_be_block_config_read(union ctl_io *io); 274229997Skenstatic int ctl_be_block_lun_info(void *be_lun, struct sbuf *sb); 275229997Skenint ctl_be_block_init(void); 276229997Sken 277229997Skenstatic struct ctl_backend_driver ctl_be_block_driver = 278229997Sken{ 279230334Sken .name = "block", 280230334Sken .flags = CTL_BE_FLAG_HAS_CONFIG, 281230334Sken .init = ctl_be_block_init, 282230334Sken .data_submit = ctl_be_block_submit, 283230334Sken .data_move_done = ctl_be_block_move_done, 284230334Sken .config_read = ctl_be_block_config_read, 285230334Sken .config_write = ctl_be_block_config_write, 286230334Sken .ioctl = ctl_be_block_ioctl, 287230334Sken .lun_info = ctl_be_block_lun_info 288229997Sken}; 289229997Sken 290229997SkenMALLOC_DEFINE(M_CTLBLK, "ctlblk", "Memory used for CTL block backend"); 291229997SkenCTL_BACKEND_DECLARE(cbb, ctl_be_block_driver); 292229997Sken 293264020Straszstatic uma_zone_t beio_zone; 294264020Strasz 295229997Skenstatic struct ctl_be_block_io * 296229997Skenctl_alloc_beio(struct ctl_be_block_softc *softc) 297229997Sken{ 298229997Sken struct ctl_be_block_io *beio; 299229997Sken 300264020Strasz beio = uma_zalloc(beio_zone, M_WAITOK | M_ZERO); 301264020Strasz beio->softc = softc; 302229997Sken return (beio); 303229997Sken} 304229997Sken 305229997Skenstatic void 306229997Skenctl_free_beio(struct ctl_be_block_io *beio) 307229997Sken{ 308229997Sken int duplicate_free; 309229997Sken int i; 310229997Sken 311229997Sken duplicate_free = 0; 312229997Sken 313229997Sken for (i = 0; i < beio->num_segs; i++) { 314229997Sken if (beio->sg_segs[i].addr == NULL) 315229997Sken duplicate_free++; 316229997Sken 317229997Sken uma_zfree(beio->lun->lun_zone, beio->sg_segs[i].addr); 318229997Sken beio->sg_segs[i].addr = NULL; 319267537Smav 320267537Smav /* For compare we had two equal S/G lists. */ 321267537Smav if (ARGS(beio->io)->flags & CTL_LLF_COMPARE) { 322267537Smav uma_zfree(beio->lun->lun_zone, 323267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr); 324267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = NULL; 325267537Smav } 326229997Sken } 327229997Sken 328229997Sken if (duplicate_free > 0) { 329229997Sken printf("%s: %d duplicate frees out of %d segments\n", __func__, 330229997Sken duplicate_free, beio->num_segs); 331229997Sken } 332229997Sken 333264020Strasz uma_zfree(beio_zone, beio); 334229997Sken} 335229997Sken 336229997Skenstatic void 337229997Skenctl_complete_beio(struct ctl_be_block_io *beio) 338229997Sken{ 339267877Smav union ctl_io *io = beio->io; 340229997Sken 341264274Smav if (beio->beio_cont != NULL) { 342264274Smav beio->beio_cont(beio); 343264274Smav } else { 344264274Smav ctl_free_beio(beio); 345267537Smav ctl_data_submit_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; 354267537Smav struct ctl_lba_len_flags *lbalen; 355229997Sken#ifdef CTL_TIME_IO 356229997Sken struct bintime cur_bt; 357267537Smav#endif 358267537Smav int i; 359229997Sken 360267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 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 371267537Smav io->scsiio.kern_rel_offset += io->scsiio.kern_data_len; 372229997Sken 373229997Sken /* 374229997Sken * We set status at this point for read commands, and write 375229997Sken * commands with errors. 376229997Sken */ 377267537Smav if ((io->io_hdr.port_status == 0) && 378267537Smav ((io->io_hdr.flags & CTL_FLAG_ABORT) == 0) && 379267537Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) { 380267537Smav lbalen = ARGS(beio->io); 381267537Smav if (lbalen->flags & CTL_LLF_READ) { 382267537Smav ctl_set_success(&io->scsiio); 383267537Smav } else if (lbalen->flags & CTL_LLF_COMPARE) { 384267537Smav /* We have two data blocks ready for comparison. */ 385267537Smav for (i = 0; i < beio->num_segs; i++) { 386267537Smav if (memcmp(beio->sg_segs[i].addr, 387267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr, 388267537Smav beio->sg_segs[i].len) != 0) 389267537Smav break; 390267537Smav } 391267537Smav if (i < beio->num_segs) 392267537Smav ctl_set_sense(&io->scsiio, 393267537Smav /*current_error*/ 1, 394267537Smav /*sense_key*/ SSD_KEY_MISCOMPARE, 395267537Smav /*asc*/ 0x1D, 396267537Smav /*ascq*/ 0x00, 397267537Smav SSD_ELEM_NONE); 398267537Smav else 399267537Smav ctl_set_success(&io->scsiio); 400267537Smav } 401267537Smav } 402229997Sken else if ((io->io_hdr.port_status != 0) 403229997Sken && ((io->io_hdr.flags & CTL_FLAG_ABORT) == 0) 404229997Sken && ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) { 405229997Sken /* 406229997Sken * For hardware error sense keys, the sense key 407229997Sken * specific value is defined to be a retry count, 408229997Sken * but we use it to pass back an internal FETD 409229997Sken * error code. XXX KDM Hopefully the FETD is only 410229997Sken * using 16 bits for an error code, since that's 411229997Sken * all the space we have in the sks field. 412229997Sken */ 413229997Sken ctl_set_internal_failure(&io->scsiio, 414229997Sken /*sks_valid*/ 1, 415229997Sken /*retry_count*/ 416229997Sken io->io_hdr.port_status); 417229997Sken } 418229997Sken 419229997Sken /* 420229997Sken * If this is a read, or a write with errors, it is done. 421229997Sken */ 422229997Sken if ((beio->bio_cmd == BIO_READ) 423229997Sken || ((io->io_hdr.flags & CTL_FLAG_ABORT) != 0) 424229997Sken || ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)) { 425229997Sken ctl_complete_beio(beio); 426229997Sken return (0); 427229997Sken } 428229997Sken 429229997Sken /* 430229997Sken * At this point, we have a write and the DMA completed 431229997Sken * successfully. We now have to queue it to the task queue to 432229997Sken * execute the backend I/O. That is because we do blocking 433229997Sken * memory allocations, and in the file backing case, blocking I/O. 434229997Sken * This move done routine is generally called in the SIM's 435229997Sken * interrupt context, and therefore we cannot block. 436229997Sken */ 437267877Smav mtx_lock(&be_lun->queue_lock); 438229997Sken /* 439229997Sken * XXX KDM make sure that links is okay to use at this point. 440229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 441229997Sken * or deal with resource allocation here. 442229997Sken */ 443229997Sken STAILQ_INSERT_TAIL(&be_lun->datamove_queue, &io->io_hdr, links); 444267877Smav mtx_unlock(&be_lun->queue_lock); 445229997Sken 446229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 447229997Sken 448229997Sken return (0); 449229997Sken} 450229997Sken 451229997Skenstatic void 452229997Skenctl_be_block_biodone(struct bio *bio) 453229997Sken{ 454229997Sken struct ctl_be_block_io *beio; 455229997Sken struct ctl_be_block_lun *be_lun; 456229997Sken union ctl_io *io; 457261538Smav int error; 458229997Sken 459229997Sken beio = bio->bio_caller1; 460229997Sken be_lun = beio->lun; 461229997Sken io = beio->io; 462229997Sken 463229997Sken DPRINTF("entered\n"); 464229997Sken 465261538Smav error = bio->bio_error; 466267877Smav mtx_lock(&be_lun->io_lock); 467261538Smav if (error != 0) 468229997Sken beio->num_errors++; 469229997Sken 470229997Sken beio->num_bios_done++; 471229997Sken 472229997Sken /* 473229997Sken * XXX KDM will this cause WITNESS to complain? Holding a lock 474229997Sken * during the free might cause it to complain. 475229997Sken */ 476229997Sken g_destroy_bio(bio); 477229997Sken 478229997Sken /* 479229997Sken * If the send complete bit isn't set, or we aren't the last I/O to 480229997Sken * complete, then we're done. 481229997Sken */ 482229997Sken if ((beio->send_complete == 0) 483229997Sken || (beio->num_bios_done < beio->num_bios_sent)) { 484267877Smav mtx_unlock(&be_lun->io_lock); 485229997Sken return; 486229997Sken } 487229997Sken 488229997Sken /* 489229997Sken * At this point, we've verified that we are the last I/O to 490229997Sken * complete, so it's safe to drop the lock. 491229997Sken */ 492267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 493267877Smav beio->ds_tag_type, beio->ds_trans_type, 494267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 495267877Smav mtx_unlock(&be_lun->io_lock); 496229997Sken 497229997Sken /* 498229997Sken * If there are any errors from the backing device, we fail the 499229997Sken * entire I/O with a medium error. 500229997Sken */ 501229997Sken if (beio->num_errors > 0) { 502261538Smav if (error == EOPNOTSUPP) { 503261538Smav ctl_set_invalid_opcode(&io->scsiio); 504261538Smav } else if (beio->bio_cmd == BIO_FLUSH) { 505229997Sken /* XXX KDM is there is a better error here? */ 506229997Sken ctl_set_internal_failure(&io->scsiio, 507229997Sken /*sks_valid*/ 1, 508229997Sken /*retry_count*/ 0xbad2); 509229997Sken } else 510229997Sken ctl_set_medium_error(&io->scsiio); 511229997Sken ctl_complete_beio(beio); 512229997Sken return; 513229997Sken } 514229997Sken 515229997Sken /* 516267537Smav * If this is a write, a flush, a delete or verify, we're all done. 517229997Sken * If this is a read, we can now send the data to the user. 518229997Sken */ 519229997Sken if ((beio->bio_cmd == BIO_WRITE) 520264274Smav || (beio->bio_cmd == BIO_FLUSH) 521267537Smav || (beio->bio_cmd == BIO_DELETE) 522267537Smav || (ARGS(io)->flags & CTL_LLF_VERIFY)) { 523229997Sken ctl_set_success(&io->scsiio); 524229997Sken ctl_complete_beio(beio); 525229997Sken } else { 526229997Sken#ifdef CTL_TIME_IO 527229997Sken getbintime(&io->io_hdr.dma_start_bt); 528229997Sken#endif 529229997Sken ctl_datamove(io); 530229997Sken } 531229997Sken} 532229997Sken 533229997Skenstatic void 534229997Skenctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 535229997Sken struct ctl_be_block_io *beio) 536229997Sken{ 537267877Smav union ctl_io *io = beio->io; 538229997Sken struct mount *mountpoint; 539241896Skib int error, lock_flags; 540229997Sken 541229997Sken DPRINTF("entered\n"); 542229997Sken 543267877Smav binuptime(&beio->ds_t0); 544267877Smav mtx_lock(&be_lun->io_lock); 545267877Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 546267877Smav mtx_unlock(&be_lun->io_lock); 547229997Sken 548267877Smav (void) vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 549229997Sken 550229997Sken if (MNT_SHARED_WRITES(mountpoint) 551229997Sken || ((mountpoint == NULL) 552229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 553229997Sken lock_flags = LK_SHARED; 554229997Sken else 555229997Sken lock_flags = LK_EXCLUSIVE; 556229997Sken 557229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 558229997Sken 559229997Sken error = VOP_FSYNC(be_lun->vn, MNT_WAIT, curthread); 560229997Sken VOP_UNLOCK(be_lun->vn, 0); 561229997Sken 562229997Sken vn_finished_write(mountpoint); 563229997Sken 564267877Smav mtx_lock(&be_lun->io_lock); 565267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 566267877Smav beio->ds_tag_type, beio->ds_trans_type, 567267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 568267877Smav mtx_unlock(&be_lun->io_lock); 569267877Smav 570229997Sken if (error == 0) 571229997Sken ctl_set_success(&io->scsiio); 572229997Sken else { 573229997Sken /* XXX KDM is there is a better error here? */ 574229997Sken ctl_set_internal_failure(&io->scsiio, 575229997Sken /*sks_valid*/ 1, 576229997Sken /*retry_count*/ 0xbad1); 577229997Sken } 578229997Sken 579229997Sken ctl_complete_beio(beio); 580229997Sken} 581229997Sken 582258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_start, "uint64_t"); 583258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_start, "uint64_t"); 584258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_done,"uint64_t"); 585258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_done, "uint64_t"); 586229997Sken 587229997Skenstatic void 588229997Skenctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 589229997Sken struct ctl_be_block_io *beio) 590229997Sken{ 591229997Sken struct ctl_be_block_filedata *file_data; 592229997Sken union ctl_io *io; 593229997Sken struct uio xuio; 594229997Sken struct iovec *xiovec; 595241896Skib int flags; 596229997Sken int error, i; 597229997Sken 598229997Sken DPRINTF("entered\n"); 599229997Sken 600229997Sken file_data = &be_lun->backend.file; 601229997Sken io = beio->io; 602271309Smav flags = 0; 603271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 604271309Smav flags |= IO_DIRECT; 605271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 606271309Smav flags |= IO_SYNC; 607229997Sken 608267537Smav bzero(&xuio, sizeof(xuio)); 609229997Sken if (beio->bio_cmd == BIO_READ) { 610229997Sken SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 611267537Smav xuio.uio_rw = UIO_READ; 612229997Sken } else { 613229997Sken SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 614267537Smav xuio.uio_rw = UIO_WRITE; 615229997Sken } 616229997Sken xuio.uio_offset = beio->io_offset; 617229997Sken xuio.uio_resid = beio->io_len; 618229997Sken xuio.uio_segflg = UIO_SYSSPACE; 619229997Sken xuio.uio_iov = beio->xiovecs; 620229997Sken xuio.uio_iovcnt = beio->num_segs; 621229997Sken xuio.uio_td = curthread; 622229997Sken 623229997Sken for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 624229997Sken xiovec->iov_base = beio->sg_segs[i].addr; 625229997Sken xiovec->iov_len = beio->sg_segs[i].len; 626229997Sken } 627229997Sken 628267877Smav binuptime(&beio->ds_t0); 629267877Smav mtx_lock(&be_lun->io_lock); 630267877Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 631267877Smav mtx_unlock(&be_lun->io_lock); 632267877Smav 633229997Sken if (beio->bio_cmd == BIO_READ) { 634229997Sken vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 635229997Sken 636229997Sken /* 637229997Sken * UFS pays attention to IO_DIRECT for reads. If the 638229997Sken * DIRECTIO option is configured into the kernel, it calls 639229997Sken * ffs_rawread(). But that only works for single-segment 640229997Sken * uios with user space addresses. In our case, with a 641229997Sken * kernel uio, it still reads into the buffer cache, but it 642229997Sken * will just try to release the buffer from the cache later 643229997Sken * on in ffs_read(). 644229997Sken * 645229997Sken * ZFS does not pay attention to IO_DIRECT for reads. 646229997Sken * 647229997Sken * UFS does not pay attention to IO_SYNC for reads. 648229997Sken * 649229997Sken * ZFS pays attention to IO_SYNC (which translates into the 650229997Sken * Solaris define FRSYNC for zfs_read()) for reads. It 651229997Sken * attempts to sync the file before reading. 652229997Sken * 653229997Sken * So, to attempt to provide some barrier semantics in the 654229997Sken * BIO_ORDERED case, set both IO_DIRECT and IO_SYNC. 655229997Sken */ 656271309Smav error = VOP_READ(be_lun->vn, &xuio, flags, file_data->cred); 657229997Sken 658229997Sken VOP_UNLOCK(be_lun->vn, 0); 659267537Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 660229997Sken } else { 661229997Sken struct mount *mountpoint; 662229997Sken int lock_flags; 663229997Sken 664229997Sken (void)vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 665229997Sken 666229997Sken if (MNT_SHARED_WRITES(mountpoint) 667229997Sken || ((mountpoint == NULL) 668229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 669229997Sken lock_flags = LK_SHARED; 670229997Sken else 671229997Sken lock_flags = LK_EXCLUSIVE; 672229997Sken 673229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 674229997Sken 675229997Sken /* 676229997Sken * UFS pays attention to IO_DIRECT for writes. The write 677229997Sken * is done asynchronously. (Normally the write would just 678229997Sken * get put into cache. 679229997Sken * 680229997Sken * UFS pays attention to IO_SYNC for writes. It will 681229997Sken * attempt to write the buffer out synchronously if that 682229997Sken * flag is set. 683229997Sken * 684229997Sken * ZFS does not pay attention to IO_DIRECT for writes. 685229997Sken * 686229997Sken * ZFS pays attention to IO_SYNC (a.k.a. FSYNC or FRSYNC) 687229997Sken * for writes. It will flush the transaction from the 688229997Sken * cache before returning. 689229997Sken * 690229997Sken * So if we've got the BIO_ORDERED flag set, we want 691229997Sken * IO_SYNC in either the UFS or ZFS case. 692229997Sken */ 693271309Smav error = VOP_WRITE(be_lun->vn, &xuio, flags, file_data->cred); 694229997Sken VOP_UNLOCK(be_lun->vn, 0); 695229997Sken 696229997Sken vn_finished_write(mountpoint); 697267537Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 698229997Sken } 699229997Sken 700267877Smav mtx_lock(&be_lun->io_lock); 701267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 702267877Smav beio->ds_tag_type, beio->ds_trans_type, 703267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 704267877Smav mtx_unlock(&be_lun->io_lock); 705267877Smav 706229997Sken /* 707229997Sken * If we got an error, set the sense data to "MEDIUM ERROR" and 708229997Sken * return the I/O to the user. 709229997Sken */ 710229997Sken if (error != 0) { 711229997Sken char path_str[32]; 712229997Sken 713229997Sken ctl_scsi_path_string(io, path_str, sizeof(path_str)); 714229997Sken /* 715229997Sken * XXX KDM ZFS returns ENOSPC when the underlying 716229997Sken * filesystem fills up. What kind of SCSI error should we 717229997Sken * return for that? 718229997Sken */ 719229997Sken printf("%s%s command returned errno %d\n", path_str, 720229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", error); 721229997Sken ctl_set_medium_error(&io->scsiio); 722229997Sken ctl_complete_beio(beio); 723229997Sken return; 724229997Sken } 725229997Sken 726229997Sken /* 727269122Smav * If this is a write or a verify, we're all done. 728229997Sken * If this is a read, we can now send the data to the user. 729229997Sken */ 730269122Smav if ((beio->bio_cmd == BIO_WRITE) || 731269122Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 732229997Sken ctl_set_success(&io->scsiio); 733229997Sken ctl_complete_beio(beio); 734229997Sken } else { 735229997Sken#ifdef CTL_TIME_IO 736229997Sken getbintime(&io->io_hdr.dma_start_bt); 737229997Sken#endif 738229997Sken ctl_datamove(io); 739229997Sken } 740229997Sken} 741229997Sken 742229997Skenstatic void 743269123Smavctl_be_block_dispatch_zvol(struct ctl_be_block_lun *be_lun, 744269123Smav struct ctl_be_block_io *beio) 745269123Smav{ 746269123Smav struct ctl_be_block_devdata *dev_data; 747269123Smav union ctl_io *io; 748269123Smav struct uio xuio; 749269123Smav struct iovec *xiovec; 750269123Smav int flags; 751269123Smav int error, i; 752269123Smav 753269123Smav DPRINTF("entered\n"); 754269123Smav 755269123Smav dev_data = &be_lun->backend.dev; 756269123Smav io = beio->io; 757271309Smav flags = 0; 758271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 759271309Smav flags |= IO_DIRECT; 760271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 761271309Smav flags |= IO_SYNC; 762269123Smav 763269123Smav bzero(&xuio, sizeof(xuio)); 764269123Smav if (beio->bio_cmd == BIO_READ) { 765269123Smav SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 766269123Smav xuio.uio_rw = UIO_READ; 767269123Smav } else { 768269123Smav SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 769269123Smav xuio.uio_rw = UIO_WRITE; 770269123Smav } 771269123Smav xuio.uio_offset = beio->io_offset; 772269123Smav xuio.uio_resid = beio->io_len; 773269123Smav xuio.uio_segflg = UIO_SYSSPACE; 774269123Smav xuio.uio_iov = beio->xiovecs; 775269123Smav xuio.uio_iovcnt = beio->num_segs; 776269123Smav xuio.uio_td = curthread; 777269123Smav 778269123Smav for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 779269123Smav xiovec->iov_base = beio->sg_segs[i].addr; 780269123Smav xiovec->iov_len = beio->sg_segs[i].len; 781269123Smav } 782269123Smav 783269123Smav binuptime(&beio->ds_t0); 784269123Smav mtx_lock(&be_lun->io_lock); 785269123Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 786269123Smav mtx_unlock(&be_lun->io_lock); 787269123Smav 788269123Smav if (beio->bio_cmd == BIO_READ) { 789271309Smav error = (*dev_data->csw->d_read)(dev_data->cdev, &xuio, flags); 790269123Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 791269123Smav } else { 792271309Smav error = (*dev_data->csw->d_write)(dev_data->cdev, &xuio, flags); 793269123Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 794269123Smav } 795269123Smav 796269123Smav mtx_lock(&be_lun->io_lock); 797269123Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 798269123Smav beio->ds_tag_type, beio->ds_trans_type, 799269123Smav /*now*/ NULL, /*then*/&beio->ds_t0); 800269123Smav mtx_unlock(&be_lun->io_lock); 801269123Smav 802269123Smav /* 803269123Smav * If we got an error, set the sense data to "MEDIUM ERROR" and 804269123Smav * return the I/O to the user. 805269123Smav */ 806269123Smav if (error != 0) { 807269123Smav ctl_set_medium_error(&io->scsiio); 808269123Smav ctl_complete_beio(beio); 809269123Smav return; 810269123Smav } 811269123Smav 812269123Smav /* 813269123Smav * If this is a write or a verify, we're all done. 814269123Smav * If this is a read, we can now send the data to the user. 815269123Smav */ 816269123Smav if ((beio->bio_cmd == BIO_WRITE) || 817269123Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 818269123Smav ctl_set_success(&io->scsiio); 819269123Smav ctl_complete_beio(beio); 820269123Smav } else { 821269123Smav#ifdef CTL_TIME_IO 822269123Smav getbintime(&io->io_hdr.dma_start_bt); 823269123Smav#endif 824269123Smav ctl_datamove(io); 825269123Smav } 826269123Smav} 827269123Smav 828269123Smavstatic void 829229997Skenctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 830229997Sken struct ctl_be_block_io *beio) 831229997Sken{ 832229997Sken struct bio *bio; 833229997Sken union ctl_io *io; 834229997Sken struct ctl_be_block_devdata *dev_data; 835229997Sken 836229997Sken dev_data = &be_lun->backend.dev; 837229997Sken io = beio->io; 838229997Sken 839229997Sken DPRINTF("entered\n"); 840229997Sken 841229997Sken /* This can't fail, it's a blocking allocation. */ 842229997Sken bio = g_alloc_bio(); 843229997Sken 844229997Sken bio->bio_cmd = BIO_FLUSH; 845229997Sken bio->bio_flags |= BIO_ORDERED; 846229997Sken bio->bio_dev = dev_data->cdev; 847229997Sken bio->bio_offset = 0; 848229997Sken bio->bio_data = 0; 849229997Sken bio->bio_done = ctl_be_block_biodone; 850229997Sken bio->bio_caller1 = beio; 851229997Sken bio->bio_pblkno = 0; 852229997Sken 853229997Sken /* 854229997Sken * We don't need to acquire the LUN lock here, because we are only 855229997Sken * sending one bio, and so there is no other context to synchronize 856229997Sken * with. 857229997Sken */ 858229997Sken beio->num_bios_sent = 1; 859229997Sken beio->send_complete = 1; 860229997Sken 861229997Sken binuptime(&beio->ds_t0); 862267877Smav mtx_lock(&be_lun->io_lock); 863229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 864267877Smav mtx_unlock(&be_lun->io_lock); 865229997Sken 866229997Sken (*dev_data->csw->d_strategy)(bio); 867229997Sken} 868229997Sken 869229997Skenstatic void 870264274Smavctl_be_block_unmap_dev_range(struct ctl_be_block_lun *be_lun, 871264274Smav struct ctl_be_block_io *beio, 872264274Smav uint64_t off, uint64_t len, int last) 873264274Smav{ 874264274Smav struct bio *bio; 875264274Smav struct ctl_be_block_devdata *dev_data; 876264296Smav uint64_t maxlen; 877264274Smav 878264274Smav dev_data = &be_lun->backend.dev; 879264296Smav maxlen = LONG_MAX - (LONG_MAX % be_lun->blocksize); 880264274Smav while (len > 0) { 881264274Smav bio = g_alloc_bio(); 882264274Smav bio->bio_cmd = BIO_DELETE; 883264274Smav bio->bio_dev = dev_data->cdev; 884264274Smav bio->bio_offset = off; 885264296Smav bio->bio_length = MIN(len, maxlen); 886264274Smav bio->bio_data = 0; 887264274Smav bio->bio_done = ctl_be_block_biodone; 888264274Smav bio->bio_caller1 = beio; 889264296Smav bio->bio_pblkno = off / be_lun->blocksize; 890264274Smav 891264274Smav off += bio->bio_length; 892264274Smav len -= bio->bio_length; 893264274Smav 894267877Smav mtx_lock(&be_lun->io_lock); 895264274Smav beio->num_bios_sent++; 896264274Smav if (last && len == 0) 897264274Smav beio->send_complete = 1; 898267877Smav mtx_unlock(&be_lun->io_lock); 899264274Smav 900264274Smav (*dev_data->csw->d_strategy)(bio); 901264274Smav } 902264274Smav} 903264274Smav 904264274Smavstatic void 905264274Smavctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 906264274Smav struct ctl_be_block_io *beio) 907264274Smav{ 908264274Smav union ctl_io *io; 909264274Smav struct ctl_be_block_devdata *dev_data; 910267515Smav struct ctl_ptr_len_flags *ptrlen; 911264274Smav struct scsi_unmap_desc *buf, *end; 912264274Smav uint64_t len; 913264274Smav 914264274Smav dev_data = &be_lun->backend.dev; 915264274Smav io = beio->io; 916264274Smav 917264274Smav DPRINTF("entered\n"); 918264274Smav 919264274Smav binuptime(&beio->ds_t0); 920267877Smav mtx_lock(&be_lun->io_lock); 921264274Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 922267877Smav mtx_unlock(&be_lun->io_lock); 923264274Smav 924264274Smav if (beio->io_offset == -1) { 925264274Smav beio->io_len = 0; 926267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 927267515Smav buf = (struct scsi_unmap_desc *)ptrlen->ptr; 928267515Smav end = buf + ptrlen->len / sizeof(*buf); 929264274Smav for (; buf < end; buf++) { 930264274Smav len = (uint64_t)scsi_4btoul(buf->length) * 931264274Smav be_lun->blocksize; 932264274Smav beio->io_len += len; 933264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 934264274Smav scsi_8btou64(buf->lba) * be_lun->blocksize, len, 935264283Smav (end - buf < 2) ? TRUE : FALSE); 936264274Smav } 937264274Smav } else 938264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 939264274Smav beio->io_offset, beio->io_len, TRUE); 940264274Smav} 941264274Smav 942264274Smavstatic void 943229997Skenctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 944229997Sken struct ctl_be_block_io *beio) 945229997Sken{ 946267877Smav TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 947229997Sken int i; 948229997Sken struct bio *bio; 949229997Sken struct ctl_be_block_devdata *dev_data; 950229997Sken off_t cur_offset; 951229997Sken int max_iosize; 952229997Sken 953229997Sken DPRINTF("entered\n"); 954229997Sken 955229997Sken dev_data = &be_lun->backend.dev; 956229997Sken 957229997Sken /* 958229997Sken * We have to limit our I/O size to the maximum supported by the 959229997Sken * backend device. Hopefully it is MAXPHYS. If the driver doesn't 960229997Sken * set it properly, use DFLTPHYS. 961229997Sken */ 962229997Sken max_iosize = dev_data->cdev->si_iosize_max; 963229997Sken if (max_iosize < PAGE_SIZE) 964229997Sken max_iosize = DFLTPHYS; 965229997Sken 966229997Sken cur_offset = beio->io_offset; 967229997Sken for (i = 0; i < beio->num_segs; i++) { 968229997Sken size_t cur_size; 969229997Sken uint8_t *cur_ptr; 970229997Sken 971229997Sken cur_size = beio->sg_segs[i].len; 972229997Sken cur_ptr = beio->sg_segs[i].addr; 973229997Sken 974229997Sken while (cur_size > 0) { 975229997Sken /* This can't fail, it's a blocking allocation. */ 976229997Sken bio = g_alloc_bio(); 977229997Sken 978229997Sken KASSERT(bio != NULL, ("g_alloc_bio() failed!\n")); 979229997Sken 980229997Sken bio->bio_cmd = beio->bio_cmd; 981229997Sken bio->bio_dev = dev_data->cdev; 982229997Sken bio->bio_caller1 = beio; 983229997Sken bio->bio_length = min(cur_size, max_iosize); 984229997Sken bio->bio_offset = cur_offset; 985229997Sken bio->bio_data = cur_ptr; 986229997Sken bio->bio_done = ctl_be_block_biodone; 987229997Sken bio->bio_pblkno = cur_offset / be_lun->blocksize; 988229997Sken 989229997Sken cur_offset += bio->bio_length; 990229997Sken cur_ptr += bio->bio_length; 991229997Sken cur_size -= bio->bio_length; 992229997Sken 993267877Smav TAILQ_INSERT_TAIL(&queue, bio, bio_queue); 994229997Sken beio->num_bios_sent++; 995229997Sken } 996229997Sken } 997267877Smav binuptime(&beio->ds_t0); 998267877Smav mtx_lock(&be_lun->io_lock); 999267877Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1000267877Smav beio->send_complete = 1; 1001267877Smav mtx_unlock(&be_lun->io_lock); 1002267877Smav 1003267877Smav /* 1004267877Smav * Fire off all allocated requests! 1005267877Smav */ 1006267877Smav while ((bio = TAILQ_FIRST(&queue)) != NULL) { 1007267877Smav TAILQ_REMOVE(&queue, bio, bio_queue); 1008267877Smav (*dev_data->csw->d_strategy)(bio); 1009267877Smav } 1010229997Sken} 1011229997Sken 1012229997Skenstatic void 1013264274Smavctl_be_block_cw_done_ws(struct ctl_be_block_io *beio) 1014264274Smav{ 1015264274Smav union ctl_io *io; 1016264274Smav 1017264274Smav io = beio->io; 1018264274Smav ctl_free_beio(beio); 1019267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1020267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1021267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1022264274Smav ctl_config_write_done(io); 1023264274Smav return; 1024264274Smav } 1025264274Smav 1026264274Smav ctl_be_block_config_write(io); 1027264274Smav} 1028264274Smav 1029264274Smavstatic void 1030264274Smavctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun, 1031264274Smav union ctl_io *io) 1032264274Smav{ 1033264274Smav struct ctl_be_block_io *beio; 1034264274Smav struct ctl_be_block_softc *softc; 1035267515Smav struct ctl_lba_len_flags *lbalen; 1036264274Smav uint64_t len_left, lba; 1037264274Smav int i, seglen; 1038264274Smav uint8_t *buf, *end; 1039264274Smav 1040264274Smav DPRINTF("entered\n"); 1041264274Smav 1042267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1043264274Smav softc = be_lun->softc; 1044267537Smav lbalen = ARGS(beio->io); 1045264274Smav 1046271839Smav if (lbalen->flags & ~(SWS_LBDATA | SWS_UNMAP | SWS_ANCHOR | SWS_NDOB) || 1047269622Smav (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR) && be_lun->unmap == NULL)) { 1048264274Smav ctl_free_beio(beio); 1049264274Smav ctl_set_invalid_field(&io->scsiio, 1050264274Smav /*sks_valid*/ 1, 1051264274Smav /*command*/ 1, 1052264274Smav /*field*/ 1, 1053264274Smav /*bit_valid*/ 0, 1054264274Smav /*bit*/ 0); 1055264274Smav ctl_config_write_done(io); 1056264274Smav return; 1057264274Smav } 1058264274Smav 1059264274Smav switch (io->scsiio.tag_type) { 1060264274Smav case CTL_TAG_ORDERED: 1061264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1062264274Smav break; 1063264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1064264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1065264274Smav break; 1066264274Smav case CTL_TAG_UNTAGGED: 1067264274Smav case CTL_TAG_SIMPLE: 1068264274Smav case CTL_TAG_ACA: 1069264274Smav default: 1070264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1071264274Smav break; 1072264274Smav } 1073264274Smav 1074269622Smav if (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR)) { 1075267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1076267515Smav beio->io_len = (uint64_t)lbalen->len * be_lun->blocksize; 1077264274Smav beio->bio_cmd = BIO_DELETE; 1078264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1079264274Smav 1080264274Smav be_lun->unmap(be_lun, beio); 1081264274Smav return; 1082264274Smav } 1083264274Smav 1084264274Smav beio->bio_cmd = BIO_WRITE; 1085264274Smav beio->ds_trans_type = DEVSTAT_WRITE; 1086264274Smav 1087264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1088267515Smav (uintmax_t)lbalen->lba, lbalen->len); 1089264274Smav 1090267515Smav len_left = (uint64_t)lbalen->len * be_lun->blocksize; 1091264274Smav for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) { 1092264274Smav 1093264274Smav /* 1094264274Smav * Setup the S/G entry for this chunk. 1095264274Smav */ 1096264886Smav seglen = MIN(CTLBLK_MAX_SEG, len_left); 1097264274Smav seglen -= seglen % be_lun->blocksize; 1098264274Smav beio->sg_segs[i].len = seglen; 1099264274Smav beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1100264274Smav 1101264274Smav DPRINTF("segment %d addr %p len %zd\n", i, 1102264274Smav beio->sg_segs[i].addr, beio->sg_segs[i].len); 1103264274Smav 1104264274Smav beio->num_segs++; 1105264274Smav len_left -= seglen; 1106264274Smav 1107264274Smav buf = beio->sg_segs[i].addr; 1108264274Smav end = buf + seglen; 1109264274Smav for (; buf < end; buf += be_lun->blocksize) { 1110264274Smav memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize); 1111267515Smav if (lbalen->flags & SWS_LBDATA) 1112267515Smav scsi_ulto4b(lbalen->lba + lba, buf); 1113264274Smav lba++; 1114264274Smav } 1115264274Smav } 1116264274Smav 1117267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1118264274Smav beio->io_len = lba * be_lun->blocksize; 1119264274Smav 1120264274Smav /* We can not do all in one run. Correct and schedule rerun. */ 1121264274Smav if (len_left > 0) { 1122267515Smav lbalen->lba += lba; 1123267515Smav lbalen->len -= lba; 1124264274Smav beio->beio_cont = ctl_be_block_cw_done_ws; 1125264274Smav } 1126264274Smav 1127264274Smav be_lun->dispatch(be_lun, beio); 1128264274Smav} 1129264274Smav 1130264274Smavstatic void 1131264274Smavctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun, 1132264274Smav union ctl_io *io) 1133264274Smav{ 1134264274Smav struct ctl_be_block_io *beio; 1135264274Smav struct ctl_be_block_softc *softc; 1136267515Smav struct ctl_ptr_len_flags *ptrlen; 1137264274Smav 1138264274Smav DPRINTF("entered\n"); 1139264274Smav 1140267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1141264274Smav softc = be_lun->softc; 1142267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1143264274Smav 1144269622Smav if ((ptrlen->flags & ~SU_ANCHOR) != 0 || be_lun->unmap == NULL) { 1145264274Smav ctl_free_beio(beio); 1146264274Smav ctl_set_invalid_field(&io->scsiio, 1147264274Smav /*sks_valid*/ 0, 1148264274Smav /*command*/ 1, 1149264274Smav /*field*/ 0, 1150264274Smav /*bit_valid*/ 0, 1151264274Smav /*bit*/ 0); 1152264274Smav ctl_config_write_done(io); 1153264274Smav return; 1154264274Smav } 1155264274Smav 1156264274Smav switch (io->scsiio.tag_type) { 1157264274Smav case CTL_TAG_ORDERED: 1158264274Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1159264274Smav break; 1160264274Smav case CTL_TAG_HEAD_OF_QUEUE: 1161264274Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1162264274Smav break; 1163264274Smav case CTL_TAG_UNTAGGED: 1164264274Smav case CTL_TAG_SIMPLE: 1165264274Smav case CTL_TAG_ACA: 1166264274Smav default: 1167264274Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1168264274Smav break; 1169264274Smav } 1170264274Smav 1171264274Smav beio->io_len = 0; 1172264274Smav beio->io_offset = -1; 1173264274Smav 1174264274Smav beio->bio_cmd = BIO_DELETE; 1175264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1176264274Smav 1177267515Smav DPRINTF("UNMAP\n"); 1178264274Smav 1179264274Smav be_lun->unmap(be_lun, beio); 1180264274Smav} 1181264274Smav 1182264274Smavstatic void 1183264274Smavctl_be_block_cw_done(struct ctl_be_block_io *beio) 1184264274Smav{ 1185264274Smav union ctl_io *io; 1186264274Smav 1187264274Smav io = beio->io; 1188264274Smav ctl_free_beio(beio); 1189264274Smav ctl_config_write_done(io); 1190264274Smav} 1191264274Smav 1192264274Smavstatic void 1193229997Skenctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 1194229997Sken union ctl_io *io) 1195229997Sken{ 1196229997Sken struct ctl_be_block_io *beio; 1197229997Sken struct ctl_be_block_softc *softc; 1198229997Sken 1199229997Sken DPRINTF("entered\n"); 1200229997Sken 1201229997Sken softc = be_lun->softc; 1202229997Sken beio = ctl_alloc_beio(softc); 1203229997Sken beio->io = io; 1204229997Sken beio->lun = be_lun; 1205264274Smav beio->beio_cont = ctl_be_block_cw_done; 1206267519Smav PRIV(io)->ptr = (void *)beio; 1207229997Sken 1208229997Sken switch (io->scsiio.cdb[0]) { 1209229997Sken case SYNCHRONIZE_CACHE: 1210229997Sken case SYNCHRONIZE_CACHE_16: 1211249194Strasz beio->bio_cmd = BIO_FLUSH; 1212229997Sken beio->ds_trans_type = DEVSTAT_NO_DATA; 1213229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1214229997Sken beio->io_len = 0; 1215229997Sken be_lun->lun_flush(be_lun, beio); 1216229997Sken break; 1217264274Smav case WRITE_SAME_10: 1218264274Smav case WRITE_SAME_16: 1219264274Smav ctl_be_block_cw_dispatch_ws(be_lun, io); 1220264274Smav break; 1221264274Smav case UNMAP: 1222264274Smav ctl_be_block_cw_dispatch_unmap(be_lun, io); 1223264274Smav break; 1224229997Sken default: 1225229997Sken panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1226229997Sken break; 1227229997Sken } 1228229997Sken} 1229229997Sken 1230258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t"); 1231258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t"); 1232258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t"); 1233258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t"); 1234229997Sken 1235229997Skenstatic void 1236264886Smavctl_be_block_next(struct ctl_be_block_io *beio) 1237264886Smav{ 1238264886Smav struct ctl_be_block_lun *be_lun; 1239264886Smav union ctl_io *io; 1240264886Smav 1241264886Smav io = beio->io; 1242264886Smav be_lun = beio->lun; 1243264886Smav ctl_free_beio(beio); 1244267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1245267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1246267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1247267537Smav ctl_data_submit_done(io); 1248264886Smav return; 1249264886Smav } 1250264886Smav 1251264886Smav io->io_hdr.status &= ~CTL_STATUS_MASK; 1252264886Smav io->io_hdr.status |= CTL_STATUS_NONE; 1253264886Smav 1254267877Smav mtx_lock(&be_lun->queue_lock); 1255264886Smav /* 1256264886Smav * XXX KDM make sure that links is okay to use at this point. 1257264886Smav * Otherwise, we either need to add another field to ctl_io_hdr, 1258264886Smav * or deal with resource allocation here. 1259264886Smav */ 1260264886Smav STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1261267877Smav mtx_unlock(&be_lun->queue_lock); 1262264886Smav 1263264886Smav taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1264264886Smav} 1265264886Smav 1266264886Smavstatic void 1267229997Skenctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 1268229997Sken union ctl_io *io) 1269229997Sken{ 1270229997Sken struct ctl_be_block_io *beio; 1271229997Sken struct ctl_be_block_softc *softc; 1272267537Smav struct ctl_lba_len_flags *lbalen; 1273267519Smav struct ctl_ptr_len_flags *bptrlen; 1274267519Smav uint64_t len_left, lbas; 1275229997Sken int i; 1276229997Sken 1277229997Sken softc = be_lun->softc; 1278229997Sken 1279229997Sken DPRINTF("entered\n"); 1280229997Sken 1281267537Smav lbalen = ARGS(io); 1282267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1283267537Smav SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0); 1284267537Smav } else { 1285229997Sken SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0); 1286229997Sken } 1287229997Sken 1288229997Sken beio = ctl_alloc_beio(softc); 1289229997Sken beio->io = io; 1290229997Sken beio->lun = be_lun; 1291267519Smav bptrlen = PRIV(io); 1292267519Smav bptrlen->ptr = (void *)beio; 1293229997Sken 1294229997Sken switch (io->scsiio.tag_type) { 1295229997Sken case CTL_TAG_ORDERED: 1296229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1297229997Sken break; 1298229997Sken case CTL_TAG_HEAD_OF_QUEUE: 1299229997Sken beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1300229997Sken break; 1301229997Sken case CTL_TAG_UNTAGGED: 1302229997Sken case CTL_TAG_SIMPLE: 1303229997Sken case CTL_TAG_ACA: 1304229997Sken default: 1305229997Sken beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1306229997Sken break; 1307229997Sken } 1308229997Sken 1309267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1310267537Smav beio->bio_cmd = BIO_WRITE; 1311267537Smav beio->ds_trans_type = DEVSTAT_WRITE; 1312267537Smav } else { 1313229997Sken beio->bio_cmd = BIO_READ; 1314229997Sken beio->ds_trans_type = DEVSTAT_READ; 1315229997Sken } 1316229997Sken 1317264886Smav DPRINTF("%s at LBA %jx len %u @%ju\n", 1318229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", 1319267519Smav (uintmax_t)lbalen->lba, lbalen->len, bptrlen->len); 1320267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1321267537Smav lbas = CTLBLK_HALF_IO_SIZE; 1322267537Smav else 1323267537Smav lbas = CTLBLK_MAX_IO_SIZE; 1324267537Smav lbas = MIN(lbalen->len - bptrlen->len, lbas / be_lun->blocksize); 1325267519Smav beio->io_offset = (lbalen->lba + bptrlen->len) * be_lun->blocksize; 1326267519Smav beio->io_len = lbas * be_lun->blocksize; 1327267519Smav bptrlen->len += lbas; 1328229997Sken 1329264886Smav for (i = 0, len_left = beio->io_len; len_left > 0; i++) { 1330264886Smav KASSERT(i < CTLBLK_MAX_SEGS, ("Too many segs (%d >= %d)", 1331264886Smav i, CTLBLK_MAX_SEGS)); 1332229997Sken 1333229997Sken /* 1334229997Sken * Setup the S/G entry for this chunk. 1335229997Sken */ 1336264886Smav beio->sg_segs[i].len = min(CTLBLK_MAX_SEG, len_left); 1337229997Sken beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1338229997Sken 1339229997Sken DPRINTF("segment %d addr %p len %zd\n", i, 1340229997Sken beio->sg_segs[i].addr, beio->sg_segs[i].len); 1341229997Sken 1342267537Smav /* Set up second segment for compare operation. */ 1343267537Smav if (lbalen->flags & CTL_LLF_COMPARE) { 1344267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].len = 1345267537Smav beio->sg_segs[i].len; 1346267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = 1347267537Smav uma_zalloc(be_lun->lun_zone, M_WAITOK); 1348267537Smav } 1349267537Smav 1350229997Sken beio->num_segs++; 1351229997Sken len_left -= beio->sg_segs[i].len; 1352229997Sken } 1353267519Smav if (bptrlen->len < lbalen->len) 1354264886Smav beio->beio_cont = ctl_be_block_next; 1355264886Smav io->scsiio.be_move_done = ctl_be_block_move_done; 1356267537Smav /* For compare we have separate S/G lists for read and datamove. */ 1357267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1358267537Smav io->scsiio.kern_data_ptr = (uint8_t *)&beio->sg_segs[CTLBLK_HALF_SEGS]; 1359267537Smav else 1360267537Smav io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 1361264886Smav io->scsiio.kern_data_len = beio->io_len; 1362264886Smav io->scsiio.kern_data_resid = 0; 1363264886Smav io->scsiio.kern_sg_entries = beio->num_segs; 1364264886Smav io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 1365229997Sken 1366229997Sken /* 1367229997Sken * For the read case, we need to read the data into our buffers and 1368229997Sken * then we can send it back to the user. For the write case, we 1369229997Sken * need to get the data from the user first. 1370229997Sken */ 1371229997Sken if (beio->bio_cmd == BIO_READ) { 1372229997Sken SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0); 1373229997Sken be_lun->dispatch(be_lun, beio); 1374229997Sken } else { 1375229997Sken SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0); 1376229997Sken#ifdef CTL_TIME_IO 1377229997Sken getbintime(&io->io_hdr.dma_start_bt); 1378229997Sken#endif 1379229997Sken ctl_datamove(io); 1380229997Sken } 1381229997Sken} 1382229997Sken 1383229997Skenstatic void 1384229997Skenctl_be_block_worker(void *context, int pending) 1385229997Sken{ 1386229997Sken struct ctl_be_block_lun *be_lun; 1387229997Sken struct ctl_be_block_softc *softc; 1388229997Sken union ctl_io *io; 1389229997Sken 1390229997Sken be_lun = (struct ctl_be_block_lun *)context; 1391229997Sken softc = be_lun->softc; 1392229997Sken 1393229997Sken DPRINTF("entered\n"); 1394229997Sken 1395267877Smav mtx_lock(&be_lun->queue_lock); 1396229997Sken for (;;) { 1397229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue); 1398229997Sken if (io != NULL) { 1399229997Sken struct ctl_be_block_io *beio; 1400229997Sken 1401229997Sken DPRINTF("datamove queue\n"); 1402229997Sken 1403229997Sken STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr, 1404229997Sken ctl_io_hdr, links); 1405229997Sken 1406267877Smav mtx_unlock(&be_lun->queue_lock); 1407229997Sken 1408267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1409229997Sken 1410229997Sken be_lun->dispatch(be_lun, beio); 1411229997Sken 1412267877Smav mtx_lock(&be_lun->queue_lock); 1413229997Sken continue; 1414229997Sken } 1415229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue); 1416229997Sken if (io != NULL) { 1417229997Sken 1418229997Sken DPRINTF("config write queue\n"); 1419229997Sken 1420229997Sken STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr, 1421229997Sken ctl_io_hdr, links); 1422229997Sken 1423267877Smav mtx_unlock(&be_lun->queue_lock); 1424229997Sken 1425229997Sken ctl_be_block_cw_dispatch(be_lun, io); 1426229997Sken 1427267877Smav mtx_lock(&be_lun->queue_lock); 1428229997Sken continue; 1429229997Sken } 1430229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue); 1431229997Sken if (io != NULL) { 1432229997Sken DPRINTF("input queue\n"); 1433229997Sken 1434229997Sken STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr, 1435229997Sken ctl_io_hdr, links); 1436267877Smav mtx_unlock(&be_lun->queue_lock); 1437229997Sken 1438229997Sken /* 1439229997Sken * We must drop the lock, since this routine and 1440229997Sken * its children may sleep. 1441229997Sken */ 1442229997Sken ctl_be_block_dispatch(be_lun, io); 1443229997Sken 1444267877Smav mtx_lock(&be_lun->queue_lock); 1445229997Sken continue; 1446229997Sken } 1447229997Sken 1448229997Sken /* 1449229997Sken * If we get here, there is no work left in the queues, so 1450229997Sken * just break out and let the task queue go to sleep. 1451229997Sken */ 1452229997Sken break; 1453229997Sken } 1454267877Smav mtx_unlock(&be_lun->queue_lock); 1455229997Sken} 1456229997Sken 1457229997Sken/* 1458229997Sken * Entry point from CTL to the backend for I/O. We queue everything to a 1459229997Sken * work thread, so this just puts the I/O on a queue and wakes up the 1460229997Sken * thread. 1461229997Sken */ 1462229997Skenstatic int 1463229997Skenctl_be_block_submit(union ctl_io *io) 1464229997Sken{ 1465229997Sken struct ctl_be_block_lun *be_lun; 1466229997Sken struct ctl_be_lun *ctl_be_lun; 1467229997Sken 1468229997Sken DPRINTF("entered\n"); 1469229997Sken 1470229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 1471229997Sken CTL_PRIV_BACKEND_LUN].ptr; 1472229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 1473229997Sken 1474229997Sken /* 1475229997Sken * Make sure we only get SCSI I/O. 1476229997Sken */ 1477229997Sken KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type " 1478229997Sken "%#x) encountered", io->io_hdr.io_type)); 1479229997Sken 1480267519Smav PRIV(io)->len = 0; 1481267519Smav 1482267877Smav mtx_lock(&be_lun->queue_lock); 1483229997Sken /* 1484229997Sken * XXX KDM make sure that links is okay to use at this point. 1485229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 1486229997Sken * or deal with resource allocation here. 1487229997Sken */ 1488229997Sken STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1489267877Smav mtx_unlock(&be_lun->queue_lock); 1490229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1491229997Sken 1492267514Smav return (CTL_RETVAL_COMPLETE); 1493229997Sken} 1494229997Sken 1495229997Skenstatic int 1496229997Skenctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 1497229997Sken int flag, struct thread *td) 1498229997Sken{ 1499229997Sken struct ctl_be_block_softc *softc; 1500229997Sken int error; 1501229997Sken 1502229997Sken softc = &backend_block_softc; 1503229997Sken 1504229997Sken error = 0; 1505229997Sken 1506229997Sken switch (cmd) { 1507229997Sken case CTL_LUN_REQ: { 1508229997Sken struct ctl_lun_req *lun_req; 1509229997Sken 1510229997Sken lun_req = (struct ctl_lun_req *)addr; 1511229997Sken 1512229997Sken switch (lun_req->reqtype) { 1513229997Sken case CTL_LUNREQ_CREATE: 1514229997Sken error = ctl_be_block_create(softc, lun_req); 1515229997Sken break; 1516229997Sken case CTL_LUNREQ_RM: 1517229997Sken error = ctl_be_block_rm(softc, lun_req); 1518229997Sken break; 1519232604Strasz case CTL_LUNREQ_MODIFY: 1520232604Strasz error = ctl_be_block_modify(softc, lun_req); 1521232604Strasz break; 1522229997Sken default: 1523229997Sken lun_req->status = CTL_LUN_ERROR; 1524229997Sken snprintf(lun_req->error_str, sizeof(lun_req->error_str), 1525272911Smav "invalid LUN request type %d", 1526229997Sken lun_req->reqtype); 1527229997Sken break; 1528229997Sken } 1529229997Sken break; 1530229997Sken } 1531229997Sken default: 1532229997Sken error = ENOTTY; 1533229997Sken break; 1534229997Sken } 1535229997Sken 1536229997Sken return (error); 1537229997Sken} 1538229997Sken 1539229997Skenstatic int 1540229997Skenctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1541229997Sken{ 1542229997Sken struct ctl_be_block_filedata *file_data; 1543229997Sken struct ctl_lun_create_params *params; 1544229997Sken struct vattr vattr; 1545273029Smav off_t pss; 1546229997Sken int error; 1547229997Sken 1548229997Sken error = 0; 1549229997Sken file_data = &be_lun->backend.file; 1550272911Smav params = &be_lun->params; 1551229997Sken 1552229997Sken be_lun->dev_type = CTL_BE_BLOCK_FILE; 1553229997Sken be_lun->dispatch = ctl_be_block_dispatch_file; 1554229997Sken be_lun->lun_flush = ctl_be_block_flush_file; 1555229997Sken 1556229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 1557229997Sken if (error != 0) { 1558229997Sken snprintf(req->error_str, sizeof(req->error_str), 1559229997Sken "error calling VOP_GETATTR() for file %s", 1560229997Sken be_lun->dev_path); 1561229997Sken return (error); 1562229997Sken } 1563229997Sken 1564229997Sken /* 1565229997Sken * Verify that we have the ability to upgrade to exclusive 1566229997Sken * access on this file so we can trap errors at open instead 1567229997Sken * of reporting them during first access. 1568229997Sken */ 1569229997Sken if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) { 1570229997Sken vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY); 1571229997Sken if (be_lun->vn->v_iflag & VI_DOOMED) { 1572229997Sken error = EBADF; 1573229997Sken snprintf(req->error_str, sizeof(req->error_str), 1574229997Sken "error locking file %s", be_lun->dev_path); 1575229997Sken return (error); 1576229997Sken } 1577229997Sken } 1578229997Sken 1579229997Sken 1580229997Sken file_data->cred = crhold(curthread->td_ucred); 1581232604Strasz if (params->lun_size_bytes != 0) 1582232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1583232604Strasz else 1584232604Strasz be_lun->size_bytes = vattr.va_size; 1585229997Sken /* 1586229997Sken * We set the multi thread flag for file operations because all 1587229997Sken * filesystems (in theory) are capable of allowing multiple readers 1588229997Sken * of a file at once. So we want to get the maximum possible 1589229997Sken * concurrency. 1590229997Sken */ 1591229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD; 1592229997Sken 1593229997Sken /* 1594273029Smav * For files we can use any logical block size. Prefer 512 bytes 1595273029Smav * for compatibility reasons. If file's vattr.va_blocksize 1596273029Smav * (preferred I/O block size) is bigger and multiple to chosen 1597273029Smav * logical block size -- report it as physical block size. 1598229997Sken */ 1599229997Sken if (params->blocksize_bytes != 0) 1600229997Sken be_lun->blocksize = params->blocksize_bytes; 1601229997Sken else 1602229997Sken be_lun->blocksize = 512; 1603273029Smav pss = vattr.va_blocksize / be_lun->blocksize; 1604273029Smav if ((pss > 0) && (pss * be_lun->blocksize == vattr.va_blocksize) && 1605273029Smav ((pss & (pss - 1)) == 0)) { 1606273029Smav be_lun->pblockexp = fls(pss) - 1; 1607273029Smav be_lun->pblockoff = 0; 1608273029Smav } 1609229997Sken 1610229997Sken /* 1611229997Sken * Sanity check. The media size has to be at least one 1612229997Sken * sector long. 1613229997Sken */ 1614229997Sken if (be_lun->size_bytes < be_lun->blocksize) { 1615229997Sken error = EINVAL; 1616229997Sken snprintf(req->error_str, sizeof(req->error_str), 1617229997Sken "file %s size %ju < block size %u", be_lun->dev_path, 1618229997Sken (uintmax_t)be_lun->size_bytes, be_lun->blocksize); 1619229997Sken } 1620229997Sken return (error); 1621229997Sken} 1622229997Sken 1623229997Skenstatic int 1624229997Skenctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1625229997Sken{ 1626229997Sken struct ctl_lun_create_params *params; 1627229997Sken struct vattr vattr; 1628229997Sken struct cdev *dev; 1629229997Sken struct cdevsw *devsw; 1630229997Sken int error; 1631264191Smav off_t ps, pss, po, pos; 1632229997Sken 1633272911Smav params = &be_lun->params; 1634229997Sken 1635229997Sken be_lun->dev_type = CTL_BE_BLOCK_DEV; 1636229997Sken be_lun->backend.dev.cdev = be_lun->vn->v_rdev; 1637229997Sken be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev, 1638229997Sken &be_lun->backend.dev.dev_ref); 1639229997Sken if (be_lun->backend.dev.csw == NULL) 1640229997Sken panic("Unable to retrieve device switch"); 1641269123Smav if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) 1642269123Smav be_lun->dispatch = ctl_be_block_dispatch_zvol; 1643269123Smav else 1644269123Smav be_lun->dispatch = ctl_be_block_dispatch_dev; 1645269123Smav be_lun->lun_flush = ctl_be_block_flush_dev; 1646269123Smav be_lun->unmap = ctl_be_block_unmap_dev; 1647229997Sken 1648229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED); 1649229997Sken if (error) { 1650229997Sken snprintf(req->error_str, sizeof(req->error_str), 1651272911Smav "error getting vnode attributes for device %s", 1652272911Smav be_lun->dev_path); 1653229997Sken return (error); 1654229997Sken } 1655229997Sken 1656229997Sken dev = be_lun->vn->v_rdev; 1657229997Sken devsw = dev->si_devsw; 1658229997Sken if (!devsw->d_ioctl) { 1659229997Sken snprintf(req->error_str, sizeof(req->error_str), 1660272911Smav "no d_ioctl for device %s!", 1661229997Sken be_lun->dev_path); 1662229997Sken return (ENODEV); 1663229997Sken } 1664229997Sken 1665229997Sken error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, 1666229997Sken (caddr_t)&be_lun->blocksize, FREAD, 1667229997Sken curthread); 1668229997Sken if (error) { 1669229997Sken snprintf(req->error_str, sizeof(req->error_str), 1670272911Smav "error %d returned for DIOCGSECTORSIZE ioctl " 1671272911Smav "on %s!", error, be_lun->dev_path); 1672229997Sken return (error); 1673229997Sken } 1674229997Sken 1675229997Sken /* 1676229997Sken * If the user has asked for a blocksize that is greater than the 1677229997Sken * backing device's blocksize, we can do it only if the blocksize 1678229997Sken * the user is asking for is an even multiple of the underlying 1679229997Sken * device's blocksize. 1680229997Sken */ 1681229997Sken if ((params->blocksize_bytes != 0) 1682229997Sken && (params->blocksize_bytes > be_lun->blocksize)) { 1683229997Sken uint32_t bs_multiple, tmp_blocksize; 1684229997Sken 1685229997Sken bs_multiple = params->blocksize_bytes / be_lun->blocksize; 1686229997Sken 1687229997Sken tmp_blocksize = bs_multiple * be_lun->blocksize; 1688229997Sken 1689229997Sken if (tmp_blocksize == params->blocksize_bytes) { 1690229997Sken be_lun->blocksize = params->blocksize_bytes; 1691229997Sken } else { 1692229997Sken snprintf(req->error_str, sizeof(req->error_str), 1693272911Smav "requested blocksize %u is not an even " 1694229997Sken "multiple of backing device blocksize %u", 1695272911Smav params->blocksize_bytes, 1696229997Sken be_lun->blocksize); 1697229997Sken return (EINVAL); 1698229997Sken 1699229997Sken } 1700229997Sken } else if ((params->blocksize_bytes != 0) 1701229997Sken && (params->blocksize_bytes != be_lun->blocksize)) { 1702229997Sken snprintf(req->error_str, sizeof(req->error_str), 1703272911Smav "requested blocksize %u < backing device " 1704272911Smav "blocksize %u", params->blocksize_bytes, 1705229997Sken be_lun->blocksize); 1706229997Sken return (EINVAL); 1707229997Sken } 1708229997Sken 1709229997Sken error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 1710229997Sken (caddr_t)&be_lun->size_bytes, FREAD, 1711229997Sken curthread); 1712229997Sken if (error) { 1713229997Sken snprintf(req->error_str, sizeof(req->error_str), 1714272911Smav "error %d returned for DIOCGMEDIASIZE " 1715272911Smav " ioctl on %s!", error, 1716232604Strasz be_lun->dev_path); 1717229997Sken return (error); 1718229997Sken } 1719229997Sken 1720232604Strasz if (params->lun_size_bytes != 0) { 1721232604Strasz if (params->lun_size_bytes > be_lun->size_bytes) { 1722232604Strasz snprintf(req->error_str, sizeof(req->error_str), 1723272911Smav "requested LUN size %ju > backing device " 1724272911Smav "size %ju", 1725232604Strasz (uintmax_t)params->lun_size_bytes, 1726232604Strasz (uintmax_t)be_lun->size_bytes); 1727232604Strasz return (EINVAL); 1728232604Strasz } 1729232604Strasz 1730232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1731232604Strasz } 1732232604Strasz 1733264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE, 1734264191Smav (caddr_t)&ps, FREAD, curthread); 1735264191Smav if (error) 1736264191Smav ps = po = 0; 1737264191Smav else { 1738264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET, 1739264191Smav (caddr_t)&po, FREAD, curthread); 1740264191Smav if (error) 1741264191Smav po = 0; 1742264191Smav } 1743264191Smav pss = ps / be_lun->blocksize; 1744264191Smav pos = po / be_lun->blocksize; 1745264191Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1746264191Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1747264191Smav be_lun->pblockexp = fls(pss) - 1; 1748264191Smav be_lun->pblockoff = (pss - pos) % pss; 1749264191Smav } 1750264191Smav 1751229997Sken return (0); 1752229997Sken} 1753229997Sken 1754229997Skenstatic int 1755229997Skenctl_be_block_close(struct ctl_be_block_lun *be_lun) 1756229997Sken{ 1757229997Sken DROP_GIANT(); 1758229997Sken if (be_lun->vn) { 1759229997Sken int flags = FREAD | FWRITE; 1760229997Sken 1761229997Sken switch (be_lun->dev_type) { 1762229997Sken case CTL_BE_BLOCK_DEV: 1763229997Sken if (be_lun->backend.dev.csw) { 1764229997Sken dev_relthread(be_lun->backend.dev.cdev, 1765229997Sken be_lun->backend.dev.dev_ref); 1766229997Sken be_lun->backend.dev.csw = NULL; 1767229997Sken be_lun->backend.dev.cdev = NULL; 1768229997Sken } 1769229997Sken break; 1770229997Sken case CTL_BE_BLOCK_FILE: 1771229997Sken break; 1772229997Sken case CTL_BE_BLOCK_NONE: 1773258871Strasz break; 1774229997Sken default: 1775229997Sken panic("Unexpected backend type."); 1776229997Sken break; 1777229997Sken } 1778229997Sken 1779229997Sken (void)vn_close(be_lun->vn, flags, NOCRED, curthread); 1780229997Sken be_lun->vn = NULL; 1781229997Sken 1782229997Sken switch (be_lun->dev_type) { 1783229997Sken case CTL_BE_BLOCK_DEV: 1784229997Sken break; 1785229997Sken case CTL_BE_BLOCK_FILE: 1786229997Sken if (be_lun->backend.file.cred != NULL) { 1787229997Sken crfree(be_lun->backend.file.cred); 1788229997Sken be_lun->backend.file.cred = NULL; 1789229997Sken } 1790229997Sken break; 1791229997Sken case CTL_BE_BLOCK_NONE: 1792258871Strasz break; 1793229997Sken default: 1794229997Sken panic("Unexpected backend type."); 1795229997Sken break; 1796229997Sken } 1797272911Smav be_lun->dev_type = CTL_BE_BLOCK_NONE; 1798229997Sken } 1799229997Sken PICKUP_GIANT(); 1800229997Sken 1801229997Sken return (0); 1802229997Sken} 1803229997Sken 1804229997Skenstatic int 1805229997Skenctl_be_block_open(struct ctl_be_block_softc *softc, 1806229997Sken struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1807229997Sken{ 1808229997Sken struct nameidata nd; 1809229997Sken int flags; 1810229997Sken int error; 1811229997Sken 1812229997Sken /* 1813229997Sken * XXX KDM allow a read-only option? 1814229997Sken */ 1815229997Sken flags = FREAD | FWRITE; 1816229997Sken error = 0; 1817229997Sken 1818229997Sken if (rootvnode == NULL) { 1819229997Sken snprintf(req->error_str, sizeof(req->error_str), 1820272911Smav "Root filesystem is not mounted"); 1821229997Sken return (1); 1822229997Sken } 1823229997Sken 1824229997Sken if (!curthread->td_proc->p_fd->fd_cdir) { 1825229997Sken curthread->td_proc->p_fd->fd_cdir = rootvnode; 1826229997Sken VREF(rootvnode); 1827229997Sken } 1828229997Sken if (!curthread->td_proc->p_fd->fd_rdir) { 1829229997Sken curthread->td_proc->p_fd->fd_rdir = rootvnode; 1830229997Sken VREF(rootvnode); 1831229997Sken } 1832229997Sken if (!curthread->td_proc->p_fd->fd_jdir) { 1833229997Sken curthread->td_proc->p_fd->fd_jdir = rootvnode; 1834229997Sken VREF(rootvnode); 1835229997Sken } 1836229997Sken 1837229997Sken again: 1838229997Sken NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread); 1839229997Sken error = vn_open(&nd, &flags, 0, NULL); 1840229997Sken if (error) { 1841229997Sken /* 1842229997Sken * This is the only reasonable guess we can make as far as 1843229997Sken * path if the user doesn't give us a fully qualified path. 1844229997Sken * If they want to specify a file, they need to specify the 1845229997Sken * full path. 1846229997Sken */ 1847229997Sken if (be_lun->dev_path[0] != '/') { 1848229997Sken char *dev_path = "/dev/"; 1849229997Sken char *dev_name; 1850229997Sken 1851229997Sken /* Try adding device path at beginning of name */ 1852229997Sken dev_name = malloc(strlen(be_lun->dev_path) 1853229997Sken + strlen(dev_path) + 1, 1854229997Sken M_CTLBLK, M_WAITOK); 1855229997Sken if (dev_name) { 1856229997Sken sprintf(dev_name, "%s%s", dev_path, 1857229997Sken be_lun->dev_path); 1858229997Sken free(be_lun->dev_path, M_CTLBLK); 1859229997Sken be_lun->dev_path = dev_name; 1860229997Sken goto again; 1861229997Sken } 1862229997Sken } 1863229997Sken snprintf(req->error_str, sizeof(req->error_str), 1864272911Smav "error opening %s: %d", be_lun->dev_path, error); 1865229997Sken return (error); 1866229997Sken } 1867229997Sken 1868229997Sken NDFREE(&nd, NDF_ONLY_PNBUF); 1869229997Sken 1870229997Sken be_lun->vn = nd.ni_vp; 1871229997Sken 1872229997Sken /* We only support disks and files. */ 1873229997Sken if (vn_isdisk(be_lun->vn, &error)) { 1874229997Sken error = ctl_be_block_open_dev(be_lun, req); 1875229997Sken } else if (be_lun->vn->v_type == VREG) { 1876229997Sken error = ctl_be_block_open_file(be_lun, req); 1877229997Sken } else { 1878229997Sken error = EINVAL; 1879229997Sken snprintf(req->error_str, sizeof(req->error_str), 1880258871Strasz "%s is not a disk or plain file", be_lun->dev_path); 1881229997Sken } 1882229997Sken VOP_UNLOCK(be_lun->vn, 0); 1883229997Sken 1884229997Sken if (error != 0) { 1885229997Sken ctl_be_block_close(be_lun); 1886229997Sken return (error); 1887229997Sken } 1888229997Sken 1889229997Sken be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 1890229997Sken be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 1891229997Sken 1892229997Sken return (0); 1893229997Sken} 1894229997Sken 1895229997Skenstatic int 1896229997Skenctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 1897229997Sken{ 1898229997Sken struct ctl_be_block_lun *be_lun; 1899229997Sken struct ctl_lun_create_params *params; 1900267481Smav char num_thread_str[16]; 1901229997Sken char tmpstr[32]; 1902267481Smav char *value; 1903264274Smav int retval, num_threads, unmap; 1904267481Smav int tmp_num_threads; 1905229997Sken 1906229997Sken params = &req->reqdata.create; 1907229997Sken retval = 0; 1908272911Smav req->status = CTL_LUN_OK; 1909229997Sken 1910229997Sken num_threads = cbb_num_threads; 1911229997Sken 1912229997Sken be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK); 1913229997Sken 1914272911Smav be_lun->params = req->reqdata.create; 1915229997Sken be_lun->softc = softc; 1916229997Sken STAILQ_INIT(&be_lun->input_queue); 1917229997Sken STAILQ_INIT(&be_lun->config_write_queue); 1918229997Sken STAILQ_INIT(&be_lun->datamove_queue); 1919229997Sken sprintf(be_lun->lunname, "cblk%d", softc->num_luns); 1920267877Smav mtx_init(&be_lun->io_lock, "cblk io lock", NULL, MTX_DEF); 1921267877Smav mtx_init(&be_lun->queue_lock, "cblk queue lock", NULL, MTX_DEF); 1922268280Smav ctl_init_opts(&be_lun->ctl_be_lun.options, 1923268280Smav req->num_be_args, req->kern_be_args); 1924229997Sken 1925264886Smav be_lun->lun_zone = uma_zcreate(be_lun->lunname, CTLBLK_MAX_SEG, 1926256995Smav NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0); 1927229997Sken 1928229997Sken if (be_lun->lun_zone == NULL) { 1929229997Sken snprintf(req->error_str, sizeof(req->error_str), 1930272911Smav "error allocating UMA zone"); 1931229997Sken goto bailout_error; 1932229997Sken } 1933229997Sken 1934229997Sken if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 1935229997Sken be_lun->ctl_be_lun.lun_type = params->device_type; 1936229997Sken else 1937229997Sken be_lun->ctl_be_lun.lun_type = T_DIRECT; 1938229997Sken 1939229997Sken if (be_lun->ctl_be_lun.lun_type == T_DIRECT) { 1940268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "file"); 1941267499Smav if (value == NULL) { 1942229997Sken snprintf(req->error_str, sizeof(req->error_str), 1943272911Smav "no file argument specified"); 1944229997Sken goto bailout_error; 1945229997Sken } 1946267499Smav be_lun->dev_path = strdup(value, M_CTLBLK); 1947272911Smav be_lun->blocksize = 512; 1948272911Smav be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 1949229997Sken 1950229997Sken retval = ctl_be_block_open(softc, be_lun, req); 1951229997Sken if (retval != 0) { 1952229997Sken retval = 0; 1953272911Smav req->status = CTL_LUN_WARNING; 1954229997Sken } 1955229997Sken } else { 1956229997Sken /* 1957229997Sken * For processor devices, we don't have any size. 1958229997Sken */ 1959229997Sken be_lun->blocksize = 0; 1960264191Smav be_lun->pblockexp = 0; 1961264191Smav be_lun->pblockoff = 0; 1962229997Sken be_lun->size_blocks = 0; 1963229997Sken be_lun->size_bytes = 0; 1964229997Sken be_lun->ctl_be_lun.maxlba = 0; 1965229997Sken 1966229997Sken /* 1967229997Sken * Default to just 1 thread for processor devices. 1968229997Sken */ 1969229997Sken num_threads = 1; 1970229997Sken } 1971229997Sken 1972229997Sken /* 1973229997Sken * XXX This searching loop might be refactored to be combined with 1974229997Sken * the loop above, 1975229997Sken */ 1976268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "num_threads"); 1977267481Smav if (value != NULL) { 1978267481Smav tmp_num_threads = strtol(value, NULL, 0); 1979229997Sken 1980267481Smav /* 1981267481Smav * We don't let the user specify less than one 1982267481Smav * thread, but hope he's clueful enough not to 1983267481Smav * specify 1000 threads. 1984267481Smav */ 1985267481Smav if (tmp_num_threads < 1) { 1986267481Smav snprintf(req->error_str, sizeof(req->error_str), 1987272911Smav "invalid number of threads %s", 1988272911Smav num_thread_str); 1989267481Smav goto bailout_error; 1990229997Sken } 1991267481Smav num_threads = tmp_num_threads; 1992229997Sken } 1993267481Smav unmap = 0; 1994268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "unmap"); 1995267481Smav if (value != NULL && strcmp(value, "on") == 0) 1996267481Smav unmap = 1; 1997229997Sken 1998229997Sken be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED; 1999229997Sken be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY; 2000272911Smav if (be_lun->vn == NULL) 2001272911Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_OFFLINE; 2002264274Smav if (unmap) 2003264274Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 2004229997Sken be_lun->ctl_be_lun.be_lun = be_lun; 2005272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2006272911Smav 0 : (be_lun->size_blocks - 1); 2007229997Sken be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2008264191Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2009264191Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2010272911Smav if (be_lun->dispatch == ctl_be_block_dispatch_zvol && 2011272911Smav be_lun->blocksize != 0) 2012272911Smav be_lun->ctl_be_lun.atomicblock = CTLBLK_MAX_IO_SIZE / 2013272911Smav be_lun->blocksize; 2014229997Sken /* Tell the user the blocksize we ended up using */ 2015272911Smav params->lun_size_bytes = be_lun->size_bytes; 2016229997Sken params->blocksize_bytes = be_lun->blocksize; 2017229997Sken if (params->flags & CTL_LUN_FLAG_ID_REQ) { 2018229997Sken be_lun->ctl_be_lun.req_lun_id = params->req_lun_id; 2019229997Sken be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ; 2020229997Sken } else 2021229997Sken be_lun->ctl_be_lun.req_lun_id = 0; 2022229997Sken 2023229997Sken be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown; 2024229997Sken be_lun->ctl_be_lun.lun_config_status = 2025229997Sken ctl_be_block_lun_config_status; 2026229997Sken be_lun->ctl_be_lun.be = &ctl_be_block_driver; 2027229997Sken 2028229997Sken if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 2029229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d", 2030229997Sken softc->num_luns); 2031229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr, 2032229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.serial_num), 2033229997Sken sizeof(tmpstr))); 2034229997Sken 2035229997Sken /* Tell the user what we used for a serial number */ 2036229997Sken strncpy((char *)params->serial_num, tmpstr, 2037229997Sken ctl_min(sizeof(params->serial_num), sizeof(tmpstr))); 2038229997Sken } else { 2039229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, 2040229997Sken params->serial_num, 2041229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.serial_num), 2042229997Sken sizeof(params->serial_num))); 2043229997Sken } 2044229997Sken if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 2045229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns); 2046229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr, 2047229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.device_id), 2048229997Sken sizeof(tmpstr))); 2049229997Sken 2050229997Sken /* Tell the user what we used for a device ID */ 2051229997Sken strncpy((char *)params->device_id, tmpstr, 2052229997Sken ctl_min(sizeof(params->device_id), sizeof(tmpstr))); 2053229997Sken } else { 2054229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, 2055229997Sken params->device_id, 2056229997Sken ctl_min(sizeof(be_lun->ctl_be_lun.device_id), 2057229997Sken sizeof(params->device_id))); 2058229997Sken } 2059229997Sken 2060229997Sken TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun); 2061229997Sken 2062229997Sken be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK, 2063229997Sken taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 2064229997Sken 2065229997Sken if (be_lun->io_taskqueue == NULL) { 2066229997Sken snprintf(req->error_str, sizeof(req->error_str), 2067272911Smav "unable to create taskqueue"); 2068229997Sken goto bailout_error; 2069229997Sken } 2070229997Sken 2071229997Sken /* 2072229997Sken * Note that we start the same number of threads by default for 2073229997Sken * both the file case and the block device case. For the file 2074229997Sken * case, we need multiple threads to allow concurrency, because the 2075229997Sken * vnode interface is designed to be a blocking interface. For the 2076229997Sken * block device case, ZFS zvols at least will block the caller's 2077229997Sken * context in many instances, and so we need multiple threads to 2078229997Sken * overcome that problem. Other block devices don't need as many 2079229997Sken * threads, but they shouldn't cause too many problems. 2080229997Sken * 2081229997Sken * If the user wants to just have a single thread for a block 2082229997Sken * device, he can specify that when the LUN is created, or change 2083229997Sken * the tunable/sysctl to alter the default number of threads. 2084229997Sken */ 2085229997Sken retval = taskqueue_start_threads(&be_lun->io_taskqueue, 2086229997Sken /*num threads*/num_threads, 2087229997Sken /*priority*/PWAIT, 2088229997Sken /*thread name*/ 2089229997Sken "%s taskq", be_lun->lunname); 2090229997Sken 2091229997Sken if (retval != 0) 2092229997Sken goto bailout_error; 2093229997Sken 2094229997Sken be_lun->num_threads = num_threads; 2095229997Sken 2096229997Sken mtx_lock(&softc->lock); 2097229997Sken softc->num_luns++; 2098229997Sken STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links); 2099229997Sken 2100229997Sken mtx_unlock(&softc->lock); 2101229997Sken 2102229997Sken retval = ctl_add_lun(&be_lun->ctl_be_lun); 2103229997Sken if (retval != 0) { 2104229997Sken mtx_lock(&softc->lock); 2105229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2106229997Sken links); 2107229997Sken softc->num_luns--; 2108229997Sken mtx_unlock(&softc->lock); 2109229997Sken snprintf(req->error_str, sizeof(req->error_str), 2110272911Smav "ctl_add_lun() returned error %d, see dmesg for " 2111272911Smav "details", retval); 2112229997Sken retval = 0; 2113229997Sken goto bailout_error; 2114229997Sken } 2115229997Sken 2116229997Sken mtx_lock(&softc->lock); 2117229997Sken 2118229997Sken /* 2119229997Sken * Tell the config_status routine that we're waiting so it won't 2120229997Sken * clean up the LUN in the event of an error. 2121229997Sken */ 2122229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2123229997Sken 2124229997Sken while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) { 2125229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2126229997Sken if (retval == EINTR) 2127229997Sken break; 2128229997Sken } 2129229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2130229997Sken 2131229997Sken if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) { 2132229997Sken snprintf(req->error_str, sizeof(req->error_str), 2133272911Smav "LUN configuration error, see dmesg for details"); 2134229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2135229997Sken links); 2136229997Sken softc->num_luns--; 2137229997Sken mtx_unlock(&softc->lock); 2138229997Sken goto bailout_error; 2139229997Sken } else { 2140229997Sken params->req_lun_id = be_lun->ctl_be_lun.lun_id; 2141229997Sken } 2142229997Sken 2143229997Sken mtx_unlock(&softc->lock); 2144229997Sken 2145229997Sken be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id, 2146229997Sken be_lun->blocksize, 2147229997Sken DEVSTAT_ALL_SUPPORTED, 2148229997Sken be_lun->ctl_be_lun.lun_type 2149229997Sken | DEVSTAT_TYPE_IF_OTHER, 2150229997Sken DEVSTAT_PRIORITY_OTHER); 2151229997Sken 2152229997Sken return (retval); 2153229997Sken 2154229997Skenbailout_error: 2155229997Sken req->status = CTL_LUN_ERROR; 2156229997Sken 2157267429Smav if (be_lun->io_taskqueue != NULL) 2158267429Smav taskqueue_free(be_lun->io_taskqueue); 2159229997Sken ctl_be_block_close(be_lun); 2160267429Smav if (be_lun->dev_path != NULL) 2161267429Smav free(be_lun->dev_path, M_CTLBLK); 2162267429Smav if (be_lun->lun_zone != NULL) 2163267429Smav uma_zdestroy(be_lun->lun_zone); 2164268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2165267877Smav mtx_destroy(&be_lun->queue_lock); 2166267877Smav mtx_destroy(&be_lun->io_lock); 2167229997Sken free(be_lun, M_CTLBLK); 2168229997Sken 2169229997Sken return (retval); 2170229997Sken} 2171229997Sken 2172229997Skenstatic int 2173229997Skenctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2174229997Sken{ 2175229997Sken struct ctl_lun_rm_params *params; 2176229997Sken struct ctl_be_block_lun *be_lun; 2177229997Sken int retval; 2178229997Sken 2179229997Sken params = &req->reqdata.rm; 2180229997Sken 2181229997Sken mtx_lock(&softc->lock); 2182229997Sken 2183229997Sken be_lun = NULL; 2184229997Sken 2185229997Sken STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2186229997Sken if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2187229997Sken break; 2188229997Sken } 2189229997Sken mtx_unlock(&softc->lock); 2190229997Sken 2191229997Sken if (be_lun == NULL) { 2192229997Sken snprintf(req->error_str, sizeof(req->error_str), 2193272911Smav "LUN %u is not managed by the block backend", 2194272911Smav params->lun_id); 2195229997Sken goto bailout_error; 2196229997Sken } 2197229997Sken 2198229997Sken retval = ctl_disable_lun(&be_lun->ctl_be_lun); 2199229997Sken 2200229997Sken if (retval != 0) { 2201229997Sken snprintf(req->error_str, sizeof(req->error_str), 2202272911Smav "error %d returned from ctl_disable_lun() for " 2203272911Smav "LUN %d", retval, params->lun_id); 2204229997Sken goto bailout_error; 2205229997Sken 2206229997Sken } 2207229997Sken 2208229997Sken retval = ctl_invalidate_lun(&be_lun->ctl_be_lun); 2209229997Sken if (retval != 0) { 2210229997Sken snprintf(req->error_str, sizeof(req->error_str), 2211272911Smav "error %d returned from ctl_invalidate_lun() for " 2212272911Smav "LUN %d", retval, params->lun_id); 2213229997Sken goto bailout_error; 2214229997Sken } 2215229997Sken 2216229997Sken mtx_lock(&softc->lock); 2217229997Sken 2218229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2219229997Sken 2220229997Sken while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2221229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2222229997Sken if (retval == EINTR) 2223229997Sken break; 2224229997Sken } 2225229997Sken 2226229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2227229997Sken 2228229997Sken if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2229229997Sken snprintf(req->error_str, sizeof(req->error_str), 2230272911Smav "interrupted waiting for LUN to be freed"); 2231229997Sken mtx_unlock(&softc->lock); 2232229997Sken goto bailout_error; 2233229997Sken } 2234229997Sken 2235229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links); 2236229997Sken 2237229997Sken softc->num_luns--; 2238229997Sken mtx_unlock(&softc->lock); 2239229997Sken 2240229997Sken taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task); 2241229997Sken 2242229997Sken taskqueue_free(be_lun->io_taskqueue); 2243229997Sken 2244229997Sken ctl_be_block_close(be_lun); 2245229997Sken 2246229997Sken if (be_lun->disk_stats != NULL) 2247229997Sken devstat_remove_entry(be_lun->disk_stats); 2248229997Sken 2249229997Sken uma_zdestroy(be_lun->lun_zone); 2250229997Sken 2251268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2252229997Sken free(be_lun->dev_path, M_CTLBLK); 2253267877Smav mtx_destroy(&be_lun->queue_lock); 2254267877Smav mtx_destroy(&be_lun->io_lock); 2255229997Sken free(be_lun, M_CTLBLK); 2256229997Sken 2257229997Sken req->status = CTL_LUN_OK; 2258229997Sken 2259229997Sken return (0); 2260229997Sken 2261229997Skenbailout_error: 2262229997Sken 2263229997Sken req->status = CTL_LUN_ERROR; 2264229997Sken 2265229997Sken return (0); 2266229997Sken} 2267229997Sken 2268232604Straszstatic int 2269232604Straszctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 2270232604Strasz struct ctl_lun_req *req) 2271232604Strasz{ 2272232604Strasz struct vattr vattr; 2273232604Strasz int error; 2274272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2275232604Strasz 2276232604Strasz if (params->lun_size_bytes != 0) { 2277232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2278232604Strasz } else { 2279271794Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 2280232604Strasz error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 2281271794Smav VOP_UNLOCK(be_lun->vn, 0); 2282232604Strasz if (error != 0) { 2283232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2284232604Strasz "error calling VOP_GETATTR() for file %s", 2285232604Strasz be_lun->dev_path); 2286232604Strasz return (error); 2287232604Strasz } 2288232604Strasz 2289232604Strasz be_lun->size_bytes = vattr.va_size; 2290232604Strasz } 2291232604Strasz 2292232604Strasz return (0); 2293232604Strasz} 2294232604Strasz 2295232604Straszstatic int 2296232604Straszctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 2297232604Strasz struct ctl_lun_req *req) 2298232604Strasz{ 2299271794Smav struct ctl_be_block_devdata *dev_data; 2300232604Strasz int error; 2301272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2302232604Strasz uint64_t size_bytes; 2303232604Strasz 2304271794Smav dev_data = &be_lun->backend.dev; 2305271794Smav if (!dev_data->csw->d_ioctl) { 2306232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2307272911Smav "no d_ioctl for device %s!", be_lun->dev_path); 2308232604Strasz return (ENODEV); 2309232604Strasz } 2310232604Strasz 2311271794Smav error = dev_data->csw->d_ioctl(dev_data->cdev, DIOCGMEDIASIZE, 2312232604Strasz (caddr_t)&size_bytes, FREAD, 2313232604Strasz curthread); 2314232604Strasz if (error) { 2315232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2316272911Smav "error %d returned for DIOCGMEDIASIZE ioctl " 2317272911Smav "on %s!", error, be_lun->dev_path); 2318232604Strasz return (error); 2319232604Strasz } 2320232604Strasz 2321232604Strasz if (params->lun_size_bytes != 0) { 2322232604Strasz if (params->lun_size_bytes > size_bytes) { 2323232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2324272911Smav "requested LUN size %ju > backing device " 2325272911Smav "size %ju", 2326232604Strasz (uintmax_t)params->lun_size_bytes, 2327232604Strasz (uintmax_t)size_bytes); 2328232604Strasz return (EINVAL); 2329232604Strasz } 2330232604Strasz 2331232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2332232604Strasz } else { 2333232604Strasz be_lun->size_bytes = size_bytes; 2334232604Strasz } 2335232604Strasz 2336232604Strasz return (0); 2337232604Strasz} 2338232604Strasz 2339232604Straszstatic int 2340232604Straszctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2341232604Strasz{ 2342232604Strasz struct ctl_lun_modify_params *params; 2343232604Strasz struct ctl_be_block_lun *be_lun; 2344271794Smav uint64_t oldsize; 2345241896Skib int error; 2346232604Strasz 2347232604Strasz params = &req->reqdata.modify; 2348232604Strasz 2349232604Strasz mtx_lock(&softc->lock); 2350232604Strasz be_lun = NULL; 2351232604Strasz STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2352232604Strasz if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2353232604Strasz break; 2354232604Strasz } 2355232604Strasz mtx_unlock(&softc->lock); 2356232604Strasz 2357232604Strasz if (be_lun == NULL) { 2358232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2359272911Smav "LUN %u is not managed by the block backend", 2360272911Smav params->lun_id); 2361232604Strasz goto bailout_error; 2362232604Strasz } 2363232604Strasz 2364272911Smav be_lun->params.lun_size_bytes = params->lun_size_bytes; 2365232604Strasz 2366272911Smav oldsize = be_lun->size_blocks; 2367272911Smav if (be_lun->vn == NULL) 2368272911Smav error = ctl_be_block_open(softc, be_lun, req); 2369272911Smav else if (be_lun->vn->v_type == VREG) 2370232604Strasz error = ctl_be_block_modify_file(be_lun, req); 2371232604Strasz else 2372232604Strasz error = ctl_be_block_modify_dev(be_lun, req); 2373232604Strasz 2374272911Smav if (error == 0 && be_lun->size_blocks != oldsize) { 2375271794Smav be_lun->size_blocks = be_lun->size_bytes >> 2376271794Smav be_lun->blocksize_shift; 2377232604Strasz 2378271794Smav /* 2379271794Smav * The maximum LBA is the size - 1. 2380271794Smav * 2381271794Smav * XXX: Note that this field is being updated without locking, 2382271794Smav * which might cause problems on 32-bit architectures. 2383271794Smav */ 2384272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2385272911Smav 0 : (be_lun->size_blocks - 1); 2386272911Smav be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2387272911Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2388272911Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2389272911Smav if (be_lun->dispatch == ctl_be_block_dispatch_zvol && 2390272911Smav be_lun->blocksize != 0) 2391272911Smav be_lun->ctl_be_lun.atomicblock = CTLBLK_MAX_IO_SIZE / 2392272911Smav be_lun->blocksize; 2393271794Smav ctl_lun_capacity_changed(&be_lun->ctl_be_lun); 2394272911Smav if (oldsize == 0 && be_lun->size_blocks != 0) 2395272911Smav ctl_lun_online(&be_lun->ctl_be_lun); 2396271794Smav } 2397232604Strasz 2398232604Strasz /* Tell the user the exact size we ended up using */ 2399232604Strasz params->lun_size_bytes = be_lun->size_bytes; 2400232604Strasz 2401272911Smav req->status = error ? CTL_LUN_WARNING : CTL_LUN_OK; 2402232604Strasz 2403232604Strasz return (0); 2404232604Strasz 2405232604Straszbailout_error: 2406232604Strasz req->status = CTL_LUN_ERROR; 2407232604Strasz 2408232604Strasz return (0); 2409232604Strasz} 2410232604Strasz 2411229997Skenstatic void 2412229997Skenctl_be_block_lun_shutdown(void *be_lun) 2413229997Sken{ 2414229997Sken struct ctl_be_block_lun *lun; 2415229997Sken struct ctl_be_block_softc *softc; 2416229997Sken 2417229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2418229997Sken 2419229997Sken softc = lun->softc; 2420229997Sken 2421229997Sken mtx_lock(&softc->lock); 2422229997Sken lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED; 2423229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2424229997Sken wakeup(lun); 2425229997Sken mtx_unlock(&softc->lock); 2426229997Sken 2427229997Sken} 2428229997Sken 2429229997Skenstatic void 2430229997Skenctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status) 2431229997Sken{ 2432229997Sken struct ctl_be_block_lun *lun; 2433229997Sken struct ctl_be_block_softc *softc; 2434229997Sken 2435229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2436229997Sken softc = lun->softc; 2437229997Sken 2438229997Sken if (status == CTL_LUN_CONFIG_OK) { 2439229997Sken mtx_lock(&softc->lock); 2440229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2441229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2442229997Sken wakeup(lun); 2443229997Sken mtx_unlock(&softc->lock); 2444229997Sken 2445229997Sken /* 2446229997Sken * We successfully added the LUN, attempt to enable it. 2447229997Sken */ 2448229997Sken if (ctl_enable_lun(&lun->ctl_be_lun) != 0) { 2449229997Sken printf("%s: ctl_enable_lun() failed!\n", __func__); 2450229997Sken if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) { 2451229997Sken printf("%s: ctl_invalidate_lun() failed!\n", 2452229997Sken __func__); 2453229997Sken } 2454229997Sken } 2455229997Sken 2456229997Sken return; 2457229997Sken } 2458229997Sken 2459229997Sken 2460229997Sken mtx_lock(&softc->lock); 2461229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2462229997Sken lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR; 2463229997Sken wakeup(lun); 2464229997Sken mtx_unlock(&softc->lock); 2465229997Sken} 2466229997Sken 2467229997Sken 2468229997Skenstatic int 2469229997Skenctl_be_block_config_write(union ctl_io *io) 2470229997Sken{ 2471229997Sken struct ctl_be_block_lun *be_lun; 2472229997Sken struct ctl_be_lun *ctl_be_lun; 2473229997Sken int retval; 2474229997Sken 2475229997Sken retval = 0; 2476229997Sken 2477229997Sken DPRINTF("entered\n"); 2478229997Sken 2479229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2480229997Sken CTL_PRIV_BACKEND_LUN].ptr; 2481229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2482229997Sken 2483229997Sken switch (io->scsiio.cdb[0]) { 2484229997Sken case SYNCHRONIZE_CACHE: 2485229997Sken case SYNCHRONIZE_CACHE_16: 2486264274Smav case WRITE_SAME_10: 2487264274Smav case WRITE_SAME_16: 2488264274Smav case UNMAP: 2489229997Sken /* 2490229997Sken * The upper level CTL code will filter out any CDBs with 2491229997Sken * the immediate bit set and return the proper error. 2492229997Sken * 2493229997Sken * We don't really need to worry about what LBA range the 2494229997Sken * user asked to be synced out. When they issue a sync 2495229997Sken * cache command, we'll sync out the whole thing. 2496229997Sken */ 2497267877Smav mtx_lock(&be_lun->queue_lock); 2498229997Sken STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr, 2499229997Sken links); 2500267877Smav mtx_unlock(&be_lun->queue_lock); 2501229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 2502229997Sken break; 2503229997Sken case START_STOP_UNIT: { 2504229997Sken struct scsi_start_stop_unit *cdb; 2505229997Sken 2506229997Sken cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 2507229997Sken 2508229997Sken if (cdb->how & SSS_START) 2509229997Sken retval = ctl_start_lun(ctl_be_lun); 2510229997Sken else { 2511229997Sken retval = ctl_stop_lun(ctl_be_lun); 2512229997Sken /* 2513229997Sken * XXX KDM Copan-specific offline behavior. 2514229997Sken * Figure out a reasonable way to port this? 2515229997Sken */ 2516229997Sken#ifdef NEEDTOPORT 2517229997Sken if ((retval == 0) 2518229997Sken && (cdb->byte2 & SSS_ONOFFLINE)) 2519229997Sken retval = ctl_lun_offline(ctl_be_lun); 2520229997Sken#endif 2521229997Sken } 2522229997Sken 2523229997Sken /* 2524229997Sken * In general, the above routines should not fail. They 2525229997Sken * just set state for the LUN. So we've got something 2526229997Sken * pretty wrong here if we can't start or stop the LUN. 2527229997Sken */ 2528229997Sken if (retval != 0) { 2529229997Sken ctl_set_internal_failure(&io->scsiio, 2530229997Sken /*sks_valid*/ 1, 2531229997Sken /*retry_count*/ 0xf051); 2532229997Sken retval = CTL_RETVAL_COMPLETE; 2533229997Sken } else { 2534229997Sken ctl_set_success(&io->scsiio); 2535229997Sken } 2536229997Sken ctl_config_write_done(io); 2537229997Sken break; 2538229997Sken } 2539229997Sken default: 2540229997Sken ctl_set_invalid_opcode(&io->scsiio); 2541229997Sken ctl_config_write_done(io); 2542229997Sken retval = CTL_RETVAL_COMPLETE; 2543229997Sken break; 2544229997Sken } 2545229997Sken 2546229997Sken return (retval); 2547229997Sken 2548229997Sken} 2549229997Sken 2550229997Skenstatic int 2551229997Skenctl_be_block_config_read(union ctl_io *io) 2552229997Sken{ 2553229997Sken return (0); 2554229997Sken} 2555229997Sken 2556229997Skenstatic int 2557229997Skenctl_be_block_lun_info(void *be_lun, struct sbuf *sb) 2558229997Sken{ 2559229997Sken struct ctl_be_block_lun *lun; 2560229997Sken int retval; 2561229997Sken 2562229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2563229997Sken retval = 0; 2564229997Sken 2565268283Smav retval = sbuf_printf(sb, "\t<num_threads>"); 2566229997Sken 2567229997Sken if (retval != 0) 2568229997Sken goto bailout; 2569229997Sken 2570229997Sken retval = sbuf_printf(sb, "%d", lun->num_threads); 2571229997Sken 2572229997Sken if (retval != 0) 2573229997Sken goto bailout; 2574229997Sken 2575268283Smav retval = sbuf_printf(sb, "</num_threads>\n"); 2576229997Sken 2577229997Skenbailout: 2578229997Sken 2579229997Sken return (retval); 2580229997Sken} 2581229997Sken 2582229997Skenint 2583229997Skenctl_be_block_init(void) 2584229997Sken{ 2585229997Sken struct ctl_be_block_softc *softc; 2586229997Sken int retval; 2587229997Sken 2588229997Sken softc = &backend_block_softc; 2589229997Sken retval = 0; 2590229997Sken 2591267877Smav mtx_init(&softc->lock, "ctlblock", NULL, MTX_DEF); 2592264020Strasz beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io), 2593264020Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 2594229997Sken STAILQ_INIT(&softc->disk_list); 2595229997Sken STAILQ_INIT(&softc->lun_list); 2596229997Sken 2597229997Sken return (retval); 2598229997Sken} 2599