ctl_backend_block.c revision 286353
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 286353 2015-08-05 22:24:49Z mav $"); 44229997Sken 45229997Sken#include <sys/param.h> 46229997Sken#include <sys/systm.h> 47229997Sken#include <sys/kernel.h> 48229997Sken#include <sys/types.h> 49229997Sken#include <sys/kthread.h> 50229997Sken#include <sys/bio.h> 51229997Sken#include <sys/fcntl.h> 52264274Smav#include <sys/limits.h> 53229997Sken#include <sys/lock.h> 54229997Sken#include <sys/mutex.h> 55229997Sken#include <sys/condvar.h> 56229997Sken#include <sys/malloc.h> 57229997Sken#include <sys/conf.h> 58229997Sken#include <sys/ioccom.h> 59229997Sken#include <sys/queue.h> 60229997Sken#include <sys/sbuf.h> 61229997Sken#include <sys/endian.h> 62229997Sken#include <sys/uio.h> 63229997Sken#include <sys/buf.h> 64229997Sken#include <sys/taskqueue.h> 65229997Sken#include <sys/vnode.h> 66229997Sken#include <sys/namei.h> 67229997Sken#include <sys/mount.h> 68229997Sken#include <sys/disk.h> 69229997Sken#include <sys/fcntl.h> 70229997Sken#include <sys/filedesc.h> 71275474Smav#include <sys/filio.h> 72229997Sken#include <sys/proc.h> 73229997Sken#include <sys/pcpu.h> 74229997Sken#include <sys/module.h> 75229997Sken#include <sys/sdt.h> 76229997Sken#include <sys/devicestat.h> 77229997Sken#include <sys/sysctl.h> 78229997Sken 79229997Sken#include <geom/geom.h> 80229997Sken 81229997Sken#include <cam/cam.h> 82229997Sken#include <cam/scsi/scsi_all.h> 83229997Sken#include <cam/scsi/scsi_da.h> 84229997Sken#include <cam/ctl/ctl_io.h> 85229997Sken#include <cam/ctl/ctl.h> 86229997Sken#include <cam/ctl/ctl_backend.h> 87229997Sken#include <cam/ctl/ctl_frontend_internal.h> 88229997Sken#include <cam/ctl/ctl_ioctl.h> 89229997Sken#include <cam/ctl/ctl_scsi_all.h> 90229997Sken#include <cam/ctl/ctl_error.h> 91229997Sken 92229997Sken/* 93264886Smav * The idea here is that we'll allocate enough S/G space to hold a 1MB 94264886Smav * I/O. If we get an I/O larger than that, we'll split it. 95229997Sken */ 96267537Smav#define CTLBLK_HALF_IO_SIZE (512 * 1024) 97267537Smav#define CTLBLK_MAX_IO_SIZE (CTLBLK_HALF_IO_SIZE * 2) 98264886Smav#define CTLBLK_MAX_SEG MAXPHYS 99267537Smav#define CTLBLK_HALF_SEGS MAX(CTLBLK_HALF_IO_SIZE / CTLBLK_MAX_SEG, 1) 100267537Smav#define CTLBLK_MAX_SEGS (CTLBLK_HALF_SEGS * 2) 101229997Sken 102229997Sken#ifdef CTLBLK_DEBUG 103229997Sken#define DPRINTF(fmt, args...) \ 104229997Sken printf("cbb(%s:%d): " fmt, __FUNCTION__, __LINE__, ##args) 105229997Sken#else 106229997Sken#define DPRINTF(fmt, args...) do {} while(0) 107229997Sken#endif 108229997Sken 109267519Smav#define PRIV(io) \ 110267519Smav ((struct ctl_ptr_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_BACKEND]) 111267537Smav#define ARGS(io) \ 112267537Smav ((struct ctl_lba_len_flags *)&(io)->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]) 113267519Smav 114229997SkenSDT_PROVIDER_DEFINE(cbb); 115229997Sken 116229997Skentypedef enum { 117229997Sken CTL_BE_BLOCK_LUN_UNCONFIGURED = 0x01, 118229997Sken CTL_BE_BLOCK_LUN_CONFIG_ERR = 0x02, 119229997Sken CTL_BE_BLOCK_LUN_WAITING = 0x04, 120229997Sken CTL_BE_BLOCK_LUN_MULTI_THREAD = 0x08 121229997Sken} ctl_be_block_lun_flags; 122229997Sken 123229997Skentypedef enum { 124229997Sken CTL_BE_BLOCK_NONE, 125229997Sken CTL_BE_BLOCK_DEV, 126229997Sken CTL_BE_BLOCK_FILE 127229997Sken} ctl_be_block_type; 128229997Sken 129229997Skenstruct ctl_be_block_devdata { 130229997Sken struct cdev *cdev; 131229997Sken struct cdevsw *csw; 132229997Sken int dev_ref; 133229997Sken}; 134229997Sken 135229997Skenstruct ctl_be_block_filedata { 136229997Sken struct ucred *cred; 137229997Sken}; 138229997Sken 139229997Skenunion ctl_be_block_bedata { 140229997Sken struct ctl_be_block_devdata dev; 141229997Sken struct ctl_be_block_filedata file; 142229997Sken}; 143229997Sken 144229997Skenstruct ctl_be_block_io; 145229997Skenstruct ctl_be_block_lun; 146229997Sken 147229997Skentypedef void (*cbb_dispatch_t)(struct ctl_be_block_lun *be_lun, 148229997Sken struct ctl_be_block_io *beio); 149274154Smavtypedef uint64_t (*cbb_getattr_t)(struct ctl_be_block_lun *be_lun, 150274154Smav const char *attrname); 151229997Sken 152229997Sken/* 153229997Sken * Backend LUN structure. There is a 1:1 mapping between a block device 154229997Sken * and a backend block LUN, and between a backend block LUN and a CTL LUN. 155229997Sken */ 156229997Skenstruct ctl_be_block_lun { 157272911Smav struct ctl_lun_create_params params; 158229997Sken struct ctl_block_disk *disk; 159229997Sken char lunname[32]; 160229997Sken char *dev_path; 161229997Sken ctl_be_block_type dev_type; 162229997Sken struct vnode *vn; 163229997Sken union ctl_be_block_bedata backend; 164229997Sken cbb_dispatch_t dispatch; 165229997Sken cbb_dispatch_t lun_flush; 166264274Smav cbb_dispatch_t unmap; 167275474Smav cbb_dispatch_t get_lba_status; 168274154Smav cbb_getattr_t getattr; 169229997Sken uma_zone_t lun_zone; 170229997Sken uint64_t size_blocks; 171229997Sken uint64_t size_bytes; 172229997Sken uint32_t blocksize; 173229997Sken int blocksize_shift; 174264191Smav uint16_t pblockexp; 175264191Smav uint16_t pblockoff; 176275865Smav uint16_t ublockexp; 177275865Smav uint16_t ublockoff; 178275920Smav uint32_t atomicblock; 179275920Smav uint32_t opttxferlen; 180229997Sken struct ctl_be_block_softc *softc; 181229997Sken struct devstat *disk_stats; 182229997Sken ctl_be_block_lun_flags flags; 183229997Sken STAILQ_ENTRY(ctl_be_block_lun) links; 184229997Sken struct ctl_be_lun ctl_be_lun; 185229997Sken struct taskqueue *io_taskqueue; 186229997Sken struct task io_task; 187229997Sken int num_threads; 188229997Sken STAILQ_HEAD(, ctl_io_hdr) input_queue; 189275474Smav STAILQ_HEAD(, ctl_io_hdr) config_read_queue; 190229997Sken STAILQ_HEAD(, ctl_io_hdr) config_write_queue; 191229997Sken STAILQ_HEAD(, ctl_io_hdr) datamove_queue; 192267877Smav struct mtx_padalign io_lock; 193267877Smav struct mtx_padalign queue_lock; 194229997Sken}; 195229997Sken 196229997Sken/* 197229997Sken * Overall softc structure for the block backend module. 198229997Sken */ 199229997Skenstruct ctl_be_block_softc { 200229997Sken struct mtx lock; 201229997Sken int num_disks; 202229997Sken STAILQ_HEAD(, ctl_block_disk) disk_list; 203229997Sken int num_luns; 204229997Sken STAILQ_HEAD(, ctl_be_block_lun) lun_list; 205229997Sken}; 206229997Sken 207229997Skenstatic struct ctl_be_block_softc backend_block_softc; 208229997Sken 209229997Sken/* 210229997Sken * Per-I/O information. 211229997Sken */ 212229997Skenstruct ctl_be_block_io { 213229997Sken union ctl_io *io; 214229997Sken struct ctl_sg_entry sg_segs[CTLBLK_MAX_SEGS]; 215229997Sken struct iovec xiovecs[CTLBLK_MAX_SEGS]; 216229997Sken int bio_cmd; 217229997Sken int num_segs; 218229997Sken int num_bios_sent; 219229997Sken int num_bios_done; 220229997Sken int send_complete; 221229997Sken int num_errors; 222229997Sken struct bintime ds_t0; 223229997Sken devstat_tag_type ds_tag_type; 224229997Sken devstat_trans_flags ds_trans_type; 225229997Sken uint64_t io_len; 226229997Sken uint64_t io_offset; 227286353Smav int io_arg; 228229997Sken struct ctl_be_block_softc *softc; 229229997Sken struct ctl_be_block_lun *lun; 230264274Smav void (*beio_cont)(struct ctl_be_block_io *beio); /* to continue processing */ 231229997Sken}; 232229997Sken 233229997Skenstatic int cbb_num_threads = 14; 234229997SkenSYSCTL_NODE(_kern_cam_ctl, OID_AUTO, block, CTLFLAG_RD, 0, 235229997Sken "CAM Target Layer Block Backend"); 236267992ShselaskySYSCTL_INT(_kern_cam_ctl_block, OID_AUTO, num_threads, CTLFLAG_RWTUN, 237229997Sken &cbb_num_threads, 0, "Number of threads per backing file"); 238229997Sken 239229997Skenstatic struct ctl_be_block_io *ctl_alloc_beio(struct ctl_be_block_softc *softc); 240229997Skenstatic void ctl_free_beio(struct ctl_be_block_io *beio); 241229997Skenstatic void ctl_complete_beio(struct ctl_be_block_io *beio); 242229997Skenstatic int ctl_be_block_move_done(union ctl_io *io); 243229997Skenstatic void ctl_be_block_biodone(struct bio *bio); 244229997Skenstatic void ctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 245229997Sken struct ctl_be_block_io *beio); 246229997Skenstatic void ctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 247229997Sken struct ctl_be_block_io *beio); 248275474Smavstatic void ctl_be_block_gls_file(struct ctl_be_block_lun *be_lun, 249275474Smav struct ctl_be_block_io *beio); 250275481Smavstatic uint64_t ctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, 251275481Smav const char *attrname); 252229997Skenstatic void ctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 253229997Sken struct ctl_be_block_io *beio); 254264274Smavstatic void ctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 255264274Smav struct ctl_be_block_io *beio); 256229997Skenstatic void ctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 257229997Sken struct ctl_be_block_io *beio); 258274154Smavstatic uint64_t ctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, 259274154Smav const char *attrname); 260275474Smavstatic void ctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 261275474Smav union ctl_io *io); 262229997Skenstatic void ctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 263229997Sken union ctl_io *io); 264229997Skenstatic void ctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 265229997Sken union ctl_io *io); 266229997Skenstatic void ctl_be_block_worker(void *context, int pending); 267229997Skenstatic int ctl_be_block_submit(union ctl_io *io); 268229997Skenstatic int ctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 269229997Sken int flag, struct thread *td); 270229997Skenstatic int ctl_be_block_open_file(struct ctl_be_block_lun *be_lun, 271229997Sken struct ctl_lun_req *req); 272229997Skenstatic int ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, 273229997Sken struct ctl_lun_req *req); 274229997Skenstatic int ctl_be_block_close(struct ctl_be_block_lun *be_lun); 275229997Skenstatic int ctl_be_block_open(struct ctl_be_block_softc *softc, 276229997Sken struct ctl_be_block_lun *be_lun, 277229997Sken struct ctl_lun_req *req); 278229997Skenstatic int ctl_be_block_create(struct ctl_be_block_softc *softc, 279229997Sken struct ctl_lun_req *req); 280229997Skenstatic int ctl_be_block_rm(struct ctl_be_block_softc *softc, 281229997Sken struct ctl_lun_req *req); 282232604Straszstatic int ctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 283232604Strasz struct ctl_lun_req *req); 284232604Straszstatic int ctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 285232604Strasz struct ctl_lun_req *req); 286232604Straszstatic int ctl_be_block_modify(struct ctl_be_block_softc *softc, 287232604Strasz struct ctl_lun_req *req); 288229997Skenstatic void ctl_be_block_lun_shutdown(void *be_lun); 289229997Skenstatic void ctl_be_block_lun_config_status(void *be_lun, 290229997Sken ctl_lun_config_status status); 291229997Skenstatic int ctl_be_block_config_write(union ctl_io *io); 292229997Skenstatic int ctl_be_block_config_read(union ctl_io *io); 293229997Skenstatic int ctl_be_block_lun_info(void *be_lun, struct sbuf *sb); 294274154Smavstatic uint64_t ctl_be_block_lun_attr(void *be_lun, const char *attrname); 295229997Skenint ctl_be_block_init(void); 296229997Sken 297229997Skenstatic struct ctl_backend_driver ctl_be_block_driver = 298229997Sken{ 299230334Sken .name = "block", 300230334Sken .flags = CTL_BE_FLAG_HAS_CONFIG, 301230334Sken .init = ctl_be_block_init, 302230334Sken .data_submit = ctl_be_block_submit, 303230334Sken .data_move_done = ctl_be_block_move_done, 304230334Sken .config_read = ctl_be_block_config_read, 305230334Sken .config_write = ctl_be_block_config_write, 306230334Sken .ioctl = ctl_be_block_ioctl, 307274154Smav .lun_info = ctl_be_block_lun_info, 308274154Smav .lun_attr = ctl_be_block_lun_attr 309229997Sken}; 310229997Sken 311229997SkenMALLOC_DEFINE(M_CTLBLK, "ctlblk", "Memory used for CTL block backend"); 312229997SkenCTL_BACKEND_DECLARE(cbb, ctl_be_block_driver); 313229997Sken 314264020Straszstatic uma_zone_t beio_zone; 315264020Strasz 316229997Skenstatic struct ctl_be_block_io * 317229997Skenctl_alloc_beio(struct ctl_be_block_softc *softc) 318229997Sken{ 319229997Sken struct ctl_be_block_io *beio; 320229997Sken 321264020Strasz beio = uma_zalloc(beio_zone, M_WAITOK | M_ZERO); 322264020Strasz beio->softc = softc; 323229997Sken return (beio); 324229997Sken} 325229997Sken 326229997Skenstatic void 327229997Skenctl_free_beio(struct ctl_be_block_io *beio) 328229997Sken{ 329229997Sken int duplicate_free; 330229997Sken int i; 331229997Sken 332229997Sken duplicate_free = 0; 333229997Sken 334229997Sken for (i = 0; i < beio->num_segs; i++) { 335229997Sken if (beio->sg_segs[i].addr == NULL) 336229997Sken duplicate_free++; 337229997Sken 338229997Sken uma_zfree(beio->lun->lun_zone, beio->sg_segs[i].addr); 339229997Sken beio->sg_segs[i].addr = NULL; 340267537Smav 341267537Smav /* For compare we had two equal S/G lists. */ 342267537Smav if (ARGS(beio->io)->flags & CTL_LLF_COMPARE) { 343267537Smav uma_zfree(beio->lun->lun_zone, 344267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr); 345267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = NULL; 346267537Smav } 347229997Sken } 348229997Sken 349229997Sken if (duplicate_free > 0) { 350229997Sken printf("%s: %d duplicate frees out of %d segments\n", __func__, 351229997Sken duplicate_free, beio->num_segs); 352229997Sken } 353229997Sken 354264020Strasz uma_zfree(beio_zone, beio); 355229997Sken} 356229997Sken 357229997Skenstatic void 358229997Skenctl_complete_beio(struct ctl_be_block_io *beio) 359229997Sken{ 360267877Smav union ctl_io *io = beio->io; 361229997Sken 362264274Smav if (beio->beio_cont != NULL) { 363264274Smav beio->beio_cont(beio); 364264274Smav } else { 365264274Smav ctl_free_beio(beio); 366267537Smav ctl_data_submit_done(io); 367264274Smav } 368229997Sken} 369229997Sken 370229997Skenstatic int 371229997Skenctl_be_block_move_done(union ctl_io *io) 372229997Sken{ 373229997Sken struct ctl_be_block_io *beio; 374229997Sken struct ctl_be_block_lun *be_lun; 375267537Smav struct ctl_lba_len_flags *lbalen; 376229997Sken#ifdef CTL_TIME_IO 377229997Sken struct bintime cur_bt; 378267537Smav#endif 379267537Smav int i; 380229997Sken 381267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 382229997Sken be_lun = beio->lun; 383229997Sken 384229997Sken DPRINTF("entered\n"); 385229997Sken 386229997Sken#ifdef CTL_TIME_IO 387229997Sken getbintime(&cur_bt); 388229997Sken bintime_sub(&cur_bt, &io->io_hdr.dma_start_bt); 389229997Sken bintime_add(&io->io_hdr.dma_bt, &cur_bt); 390229997Sken io->io_hdr.num_dmas++; 391229997Sken#endif 392267537Smav io->scsiio.kern_rel_offset += io->scsiio.kern_data_len; 393229997Sken 394229997Sken /* 395229997Sken * We set status at this point for read commands, and write 396229997Sken * commands with errors. 397229997Sken */ 398275058Smav if (io->io_hdr.flags & CTL_FLAG_ABORT) { 399275058Smav ; 400275058Smav } else if ((io->io_hdr.port_status == 0) && 401267537Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE)) { 402267537Smav lbalen = ARGS(beio->io); 403267537Smav if (lbalen->flags & CTL_LLF_READ) { 404267537Smav ctl_set_success(&io->scsiio); 405267537Smav } else if (lbalen->flags & CTL_LLF_COMPARE) { 406267537Smav /* We have two data blocks ready for comparison. */ 407267537Smav for (i = 0; i < beio->num_segs; i++) { 408267537Smav if (memcmp(beio->sg_segs[i].addr, 409267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr, 410267537Smav beio->sg_segs[i].len) != 0) 411267537Smav break; 412267537Smav } 413267537Smav if (i < beio->num_segs) 414267537Smav ctl_set_sense(&io->scsiio, 415267537Smav /*current_error*/ 1, 416267537Smav /*sense_key*/ SSD_KEY_MISCOMPARE, 417267537Smav /*asc*/ 0x1D, 418267537Smav /*ascq*/ 0x00, 419267537Smav SSD_ELEM_NONE); 420267537Smav else 421267537Smav ctl_set_success(&io->scsiio); 422267537Smav } 423275058Smav } else if ((io->io_hdr.port_status != 0) && 424275058Smav ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_STATUS_NONE || 425275058Smav (io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS)) { 426229997Sken /* 427229997Sken * For hardware error sense keys, the sense key 428229997Sken * specific value is defined to be a retry count, 429229997Sken * but we use it to pass back an internal FETD 430229997Sken * error code. XXX KDM Hopefully the FETD is only 431229997Sken * using 16 bits for an error code, since that's 432229997Sken * all the space we have in the sks field. 433229997Sken */ 434229997Sken ctl_set_internal_failure(&io->scsiio, 435229997Sken /*sks_valid*/ 1, 436229997Sken /*retry_count*/ 437229997Sken io->io_hdr.port_status); 438229997Sken } 439229997Sken 440229997Sken /* 441229997Sken * If this is a read, or a write with errors, it is done. 442229997Sken */ 443229997Sken if ((beio->bio_cmd == BIO_READ) 444229997Sken || ((io->io_hdr.flags & CTL_FLAG_ABORT) != 0) 445229997Sken || ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE)) { 446229997Sken ctl_complete_beio(beio); 447229997Sken return (0); 448229997Sken } 449229997Sken 450229997Sken /* 451229997Sken * At this point, we have a write and the DMA completed 452229997Sken * successfully. We now have to queue it to the task queue to 453229997Sken * execute the backend I/O. That is because we do blocking 454229997Sken * memory allocations, and in the file backing case, blocking I/O. 455229997Sken * This move done routine is generally called in the SIM's 456229997Sken * interrupt context, and therefore we cannot block. 457229997Sken */ 458267877Smav mtx_lock(&be_lun->queue_lock); 459229997Sken /* 460229997Sken * XXX KDM make sure that links is okay to use at this point. 461229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 462229997Sken * or deal with resource allocation here. 463229997Sken */ 464229997Sken STAILQ_INSERT_TAIL(&be_lun->datamove_queue, &io->io_hdr, links); 465267877Smav mtx_unlock(&be_lun->queue_lock); 466229997Sken 467229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 468229997Sken 469229997Sken return (0); 470229997Sken} 471229997Sken 472229997Skenstatic void 473229997Skenctl_be_block_biodone(struct bio *bio) 474229997Sken{ 475229997Sken struct ctl_be_block_io *beio; 476229997Sken struct ctl_be_block_lun *be_lun; 477229997Sken union ctl_io *io; 478261538Smav int error; 479229997Sken 480229997Sken beio = bio->bio_caller1; 481229997Sken be_lun = beio->lun; 482229997Sken io = beio->io; 483229997Sken 484229997Sken DPRINTF("entered\n"); 485229997Sken 486261538Smav error = bio->bio_error; 487267877Smav mtx_lock(&be_lun->io_lock); 488261538Smav if (error != 0) 489229997Sken beio->num_errors++; 490229997Sken 491229997Sken beio->num_bios_done++; 492229997Sken 493229997Sken /* 494229997Sken * XXX KDM will this cause WITNESS to complain? Holding a lock 495229997Sken * during the free might cause it to complain. 496229997Sken */ 497229997Sken g_destroy_bio(bio); 498229997Sken 499229997Sken /* 500229997Sken * If the send complete bit isn't set, or we aren't the last I/O to 501229997Sken * complete, then we're done. 502229997Sken */ 503229997Sken if ((beio->send_complete == 0) 504229997Sken || (beio->num_bios_done < beio->num_bios_sent)) { 505267877Smav mtx_unlock(&be_lun->io_lock); 506229997Sken return; 507229997Sken } 508229997Sken 509229997Sken /* 510229997Sken * At this point, we've verified that we are the last I/O to 511229997Sken * complete, so it's safe to drop the lock. 512229997Sken */ 513267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 514267877Smav beio->ds_tag_type, beio->ds_trans_type, 515267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 516267877Smav mtx_unlock(&be_lun->io_lock); 517229997Sken 518229997Sken /* 519229997Sken * If there are any errors from the backing device, we fail the 520229997Sken * entire I/O with a medium error. 521229997Sken */ 522229997Sken if (beio->num_errors > 0) { 523261538Smav if (error == EOPNOTSUPP) { 524261538Smav ctl_set_invalid_opcode(&io->scsiio); 525282565Smav } else if (error == ENOSPC || error == EDQUOT) { 526273809Smav ctl_set_space_alloc_fail(&io->scsiio); 527261538Smav } else if (beio->bio_cmd == BIO_FLUSH) { 528229997Sken /* XXX KDM is there is a better error here? */ 529229997Sken ctl_set_internal_failure(&io->scsiio, 530229997Sken /*sks_valid*/ 1, 531229997Sken /*retry_count*/ 0xbad2); 532229997Sken } else 533229997Sken ctl_set_medium_error(&io->scsiio); 534229997Sken ctl_complete_beio(beio); 535229997Sken return; 536229997Sken } 537229997Sken 538229997Sken /* 539267537Smav * If this is a write, a flush, a delete or verify, we're all done. 540229997Sken * If this is a read, we can now send the data to the user. 541229997Sken */ 542229997Sken if ((beio->bio_cmd == BIO_WRITE) 543264274Smav || (beio->bio_cmd == BIO_FLUSH) 544267537Smav || (beio->bio_cmd == BIO_DELETE) 545267537Smav || (ARGS(io)->flags & CTL_LLF_VERIFY)) { 546229997Sken ctl_set_success(&io->scsiio); 547229997Sken ctl_complete_beio(beio); 548229997Sken } else { 549275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 550275058Smav beio->beio_cont == NULL) 551275058Smav ctl_set_success(&io->scsiio); 552229997Sken#ifdef CTL_TIME_IO 553229997Sken getbintime(&io->io_hdr.dma_start_bt); 554229997Sken#endif 555229997Sken ctl_datamove(io); 556229997Sken } 557229997Sken} 558229997Sken 559229997Skenstatic void 560229997Skenctl_be_block_flush_file(struct ctl_be_block_lun *be_lun, 561229997Sken struct ctl_be_block_io *beio) 562229997Sken{ 563267877Smav union ctl_io *io = beio->io; 564229997Sken struct mount *mountpoint; 565241896Skib int error, lock_flags; 566229997Sken 567229997Sken DPRINTF("entered\n"); 568229997Sken 569267877Smav binuptime(&beio->ds_t0); 570267877Smav mtx_lock(&be_lun->io_lock); 571267877Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 572267877Smav mtx_unlock(&be_lun->io_lock); 573229997Sken 574267877Smav (void) vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 575229997Sken 576229997Sken if (MNT_SHARED_WRITES(mountpoint) 577229997Sken || ((mountpoint == NULL) 578229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 579229997Sken lock_flags = LK_SHARED; 580229997Sken else 581229997Sken lock_flags = LK_EXCLUSIVE; 582229997Sken 583229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 584229997Sken 585286353Smav error = VOP_FSYNC(be_lun->vn, beio->io_arg ? MNT_NOWAIT : MNT_WAIT, 586286353Smav curthread); 587229997Sken VOP_UNLOCK(be_lun->vn, 0); 588229997Sken 589229997Sken vn_finished_write(mountpoint); 590229997Sken 591267877Smav mtx_lock(&be_lun->io_lock); 592267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 593267877Smav beio->ds_tag_type, beio->ds_trans_type, 594267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 595267877Smav mtx_unlock(&be_lun->io_lock); 596267877Smav 597229997Sken if (error == 0) 598229997Sken ctl_set_success(&io->scsiio); 599229997Sken else { 600229997Sken /* XXX KDM is there is a better error here? */ 601229997Sken ctl_set_internal_failure(&io->scsiio, 602229997Sken /*sks_valid*/ 1, 603229997Sken /*retry_count*/ 0xbad1); 604229997Sken } 605229997Sken 606229997Sken ctl_complete_beio(beio); 607229997Sken} 608229997Sken 609258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_start, "uint64_t"); 610258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_start, "uint64_t"); 611258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, file_done,"uint64_t"); 612258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, file_done, "uint64_t"); 613229997Sken 614229997Skenstatic void 615229997Skenctl_be_block_dispatch_file(struct ctl_be_block_lun *be_lun, 616229997Sken struct ctl_be_block_io *beio) 617229997Sken{ 618229997Sken struct ctl_be_block_filedata *file_data; 619229997Sken union ctl_io *io; 620229997Sken struct uio xuio; 621229997Sken struct iovec *xiovec; 622241896Skib int flags; 623229997Sken int error, i; 624229997Sken 625229997Sken DPRINTF("entered\n"); 626229997Sken 627229997Sken file_data = &be_lun->backend.file; 628229997Sken io = beio->io; 629271309Smav flags = 0; 630271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 631271309Smav flags |= IO_DIRECT; 632271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 633271309Smav flags |= IO_SYNC; 634229997Sken 635267537Smav bzero(&xuio, sizeof(xuio)); 636229997Sken if (beio->bio_cmd == BIO_READ) { 637229997Sken SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 638267537Smav xuio.uio_rw = UIO_READ; 639229997Sken } else { 640229997Sken SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 641267537Smav xuio.uio_rw = UIO_WRITE; 642229997Sken } 643229997Sken xuio.uio_offset = beio->io_offset; 644229997Sken xuio.uio_resid = beio->io_len; 645229997Sken xuio.uio_segflg = UIO_SYSSPACE; 646229997Sken xuio.uio_iov = beio->xiovecs; 647229997Sken xuio.uio_iovcnt = beio->num_segs; 648229997Sken xuio.uio_td = curthread; 649229997Sken 650229997Sken for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 651229997Sken xiovec->iov_base = beio->sg_segs[i].addr; 652229997Sken xiovec->iov_len = beio->sg_segs[i].len; 653229997Sken } 654229997Sken 655267877Smav binuptime(&beio->ds_t0); 656267877Smav mtx_lock(&be_lun->io_lock); 657267877Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 658267877Smav mtx_unlock(&be_lun->io_lock); 659267877Smav 660229997Sken if (beio->bio_cmd == BIO_READ) { 661229997Sken vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 662229997Sken 663229997Sken /* 664229997Sken * UFS pays attention to IO_DIRECT for reads. If the 665229997Sken * DIRECTIO option is configured into the kernel, it calls 666229997Sken * ffs_rawread(). But that only works for single-segment 667229997Sken * uios with user space addresses. In our case, with a 668229997Sken * kernel uio, it still reads into the buffer cache, but it 669229997Sken * will just try to release the buffer from the cache later 670229997Sken * on in ffs_read(). 671229997Sken * 672229997Sken * ZFS does not pay attention to IO_DIRECT for reads. 673229997Sken * 674229997Sken * UFS does not pay attention to IO_SYNC for reads. 675229997Sken * 676229997Sken * ZFS pays attention to IO_SYNC (which translates into the 677229997Sken * Solaris define FRSYNC for zfs_read()) for reads. It 678229997Sken * attempts to sync the file before reading. 679229997Sken */ 680271309Smav error = VOP_READ(be_lun->vn, &xuio, flags, file_data->cred); 681229997Sken 682229997Sken VOP_UNLOCK(be_lun->vn, 0); 683267537Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 684229997Sken } else { 685229997Sken struct mount *mountpoint; 686229997Sken int lock_flags; 687229997Sken 688229997Sken (void)vn_start_write(be_lun->vn, &mountpoint, V_WAIT); 689229997Sken 690229997Sken if (MNT_SHARED_WRITES(mountpoint) 691229997Sken || ((mountpoint == NULL) 692229997Sken && MNT_SHARED_WRITES(be_lun->vn->v_mount))) 693229997Sken lock_flags = LK_SHARED; 694229997Sken else 695229997Sken lock_flags = LK_EXCLUSIVE; 696229997Sken 697229997Sken vn_lock(be_lun->vn, lock_flags | LK_RETRY); 698229997Sken 699229997Sken /* 700229997Sken * UFS pays attention to IO_DIRECT for writes. The write 701229997Sken * is done asynchronously. (Normally the write would just 702229997Sken * get put into cache. 703229997Sken * 704229997Sken * UFS pays attention to IO_SYNC for writes. It will 705229997Sken * attempt to write the buffer out synchronously if that 706229997Sken * flag is set. 707229997Sken * 708229997Sken * ZFS does not pay attention to IO_DIRECT for writes. 709229997Sken * 710229997Sken * ZFS pays attention to IO_SYNC (a.k.a. FSYNC or FRSYNC) 711229997Sken * for writes. It will flush the transaction from the 712229997Sken * cache before returning. 713229997Sken */ 714271309Smav error = VOP_WRITE(be_lun->vn, &xuio, flags, file_data->cred); 715229997Sken VOP_UNLOCK(be_lun->vn, 0); 716229997Sken 717229997Sken vn_finished_write(mountpoint); 718267537Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 719229997Sken } 720229997Sken 721267877Smav mtx_lock(&be_lun->io_lock); 722267877Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 723267877Smav beio->ds_tag_type, beio->ds_trans_type, 724267877Smav /*now*/ NULL, /*then*/&beio->ds_t0); 725267877Smav mtx_unlock(&be_lun->io_lock); 726267877Smav 727229997Sken /* 728229997Sken * If we got an error, set the sense data to "MEDIUM ERROR" and 729229997Sken * return the I/O to the user. 730229997Sken */ 731229997Sken if (error != 0) { 732229997Sken char path_str[32]; 733229997Sken 734229997Sken ctl_scsi_path_string(io, path_str, sizeof(path_str)); 735229997Sken printf("%s%s command returned errno %d\n", path_str, 736229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", error); 737282565Smav if (error == ENOSPC || error == EDQUOT) { 738273809Smav ctl_set_space_alloc_fail(&io->scsiio); 739273809Smav } else 740273809Smav ctl_set_medium_error(&io->scsiio); 741229997Sken ctl_complete_beio(beio); 742229997Sken return; 743229997Sken } 744229997Sken 745229997Sken /* 746269122Smav * If this is a write or a verify, we're all done. 747229997Sken * If this is a read, we can now send the data to the user. 748229997Sken */ 749269122Smav if ((beio->bio_cmd == BIO_WRITE) || 750269122Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 751229997Sken ctl_set_success(&io->scsiio); 752229997Sken ctl_complete_beio(beio); 753229997Sken } else { 754275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 755275058Smav beio->beio_cont == NULL) 756275058Smav ctl_set_success(&io->scsiio); 757229997Sken#ifdef CTL_TIME_IO 758229997Sken getbintime(&io->io_hdr.dma_start_bt); 759229997Sken#endif 760229997Sken ctl_datamove(io); 761229997Sken } 762229997Sken} 763229997Sken 764229997Skenstatic void 765275474Smavctl_be_block_gls_file(struct ctl_be_block_lun *be_lun, 766275474Smav struct ctl_be_block_io *beio) 767275474Smav{ 768275474Smav union ctl_io *io = beio->io; 769275474Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 770275474Smav struct scsi_get_lba_status_data *data; 771275474Smav off_t roff, off; 772275474Smav int error, status; 773275474Smav 774275474Smav DPRINTF("entered\n"); 775275474Smav 776275474Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 777275474Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 778275474Smav error = VOP_IOCTL(be_lun->vn, FIOSEEKHOLE, &off, 779275474Smav 0, curthread->td_ucred, curthread); 780275474Smav if (error == 0 && off > roff) 781275474Smav status = 0; /* mapped up to off */ 782275474Smav else { 783275474Smav error = VOP_IOCTL(be_lun->vn, FIOSEEKDATA, &off, 784275474Smav 0, curthread->td_ucred, curthread); 785275474Smav if (error == 0 && off > roff) 786275474Smav status = 1; /* deallocated up to off */ 787275474Smav else { 788275474Smav status = 0; /* unknown up to the end */ 789275474Smav off = be_lun->size_bytes; 790275474Smav } 791275474Smav } 792275474Smav VOP_UNLOCK(be_lun->vn, 0); 793275474Smav 794275474Smav off >>= be_lun->blocksize_shift; 795275474Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 796275474Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 797275474Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 798275474Smav data->descr[0].length); 799275474Smav data->descr[0].status = status; 800275474Smav 801275474Smav ctl_complete_beio(beio); 802275474Smav} 803275474Smav 804275481Smavstatic uint64_t 805275481Smavctl_be_block_getattr_file(struct ctl_be_block_lun *be_lun, const char *attrname) 806275481Smav{ 807275481Smav struct vattr vattr; 808275481Smav struct statfs statfs; 809285030Smav uint64_t val; 810275481Smav int error; 811275481Smav 812285030Smav val = UINT64_MAX; 813275481Smav if (be_lun->vn == NULL) 814285030Smav return (val); 815285030Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 816275481Smav if (strcmp(attrname, "blocksused") == 0) { 817275481Smav error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 818285030Smav if (error == 0) 819285030Smav val = vattr.va_bytes >> be_lun->blocksize_shift; 820275481Smav } 821285030Smav if (strcmp(attrname, "blocksavail") == 0 && 822285030Smav (be_lun->vn->v_iflag & VI_DOOMED) == 0) { 823275481Smav error = VFS_STATFS(be_lun->vn->v_mount, &statfs); 824285030Smav if (error == 0) 825285030Smav val = (statfs.f_bavail * statfs.f_bsize) >> 826285030Smav be_lun->blocksize_shift; 827275481Smav } 828285030Smav VOP_UNLOCK(be_lun->vn, 0); 829285030Smav return (val); 830275481Smav} 831275481Smav 832275474Smavstatic void 833269123Smavctl_be_block_dispatch_zvol(struct ctl_be_block_lun *be_lun, 834269123Smav struct ctl_be_block_io *beio) 835269123Smav{ 836269123Smav struct ctl_be_block_devdata *dev_data; 837269123Smav union ctl_io *io; 838269123Smav struct uio xuio; 839269123Smav struct iovec *xiovec; 840269123Smav int flags; 841269123Smav int error, i; 842269123Smav 843269123Smav DPRINTF("entered\n"); 844269123Smav 845269123Smav dev_data = &be_lun->backend.dev; 846269123Smav io = beio->io; 847271309Smav flags = 0; 848271309Smav if (ARGS(io)->flags & CTL_LLF_DPO) 849271309Smav flags |= IO_DIRECT; 850271309Smav if (beio->bio_cmd == BIO_WRITE && ARGS(io)->flags & CTL_LLF_FUA) 851271309Smav flags |= IO_SYNC; 852269123Smav 853269123Smav bzero(&xuio, sizeof(xuio)); 854269123Smav if (beio->bio_cmd == BIO_READ) { 855269123Smav SDT_PROBE(cbb, kernel, read, file_start, 0, 0, 0, 0, 0); 856269123Smav xuio.uio_rw = UIO_READ; 857269123Smav } else { 858269123Smav SDT_PROBE(cbb, kernel, write, file_start, 0, 0, 0, 0, 0); 859269123Smav xuio.uio_rw = UIO_WRITE; 860269123Smav } 861269123Smav xuio.uio_offset = beio->io_offset; 862269123Smav xuio.uio_resid = beio->io_len; 863269123Smav xuio.uio_segflg = UIO_SYSSPACE; 864269123Smav xuio.uio_iov = beio->xiovecs; 865269123Smav xuio.uio_iovcnt = beio->num_segs; 866269123Smav xuio.uio_td = curthread; 867269123Smav 868269123Smav for (i = 0, xiovec = xuio.uio_iov; i < xuio.uio_iovcnt; i++, xiovec++) { 869269123Smav xiovec->iov_base = beio->sg_segs[i].addr; 870269123Smav xiovec->iov_len = beio->sg_segs[i].len; 871269123Smav } 872269123Smav 873269123Smav binuptime(&beio->ds_t0); 874269123Smav mtx_lock(&be_lun->io_lock); 875269123Smav devstat_start_transaction(beio->lun->disk_stats, &beio->ds_t0); 876269123Smav mtx_unlock(&be_lun->io_lock); 877269123Smav 878269123Smav if (beio->bio_cmd == BIO_READ) { 879271309Smav error = (*dev_data->csw->d_read)(dev_data->cdev, &xuio, flags); 880269123Smav SDT_PROBE(cbb, kernel, read, file_done, 0, 0, 0, 0, 0); 881269123Smav } else { 882271309Smav error = (*dev_data->csw->d_write)(dev_data->cdev, &xuio, flags); 883269123Smav SDT_PROBE(cbb, kernel, write, file_done, 0, 0, 0, 0, 0); 884269123Smav } 885269123Smav 886269123Smav mtx_lock(&be_lun->io_lock); 887269123Smav devstat_end_transaction(beio->lun->disk_stats, beio->io_len, 888269123Smav beio->ds_tag_type, beio->ds_trans_type, 889269123Smav /*now*/ NULL, /*then*/&beio->ds_t0); 890269123Smav mtx_unlock(&be_lun->io_lock); 891269123Smav 892269123Smav /* 893269123Smav * If we got an error, set the sense data to "MEDIUM ERROR" and 894269123Smav * return the I/O to the user. 895269123Smav */ 896269123Smav if (error != 0) { 897282565Smav if (error == ENOSPC || error == EDQUOT) { 898273809Smav ctl_set_space_alloc_fail(&io->scsiio); 899273809Smav } else 900273809Smav ctl_set_medium_error(&io->scsiio); 901269123Smav ctl_complete_beio(beio); 902269123Smav return; 903269123Smav } 904269123Smav 905269123Smav /* 906269123Smav * If this is a write or a verify, we're all done. 907269123Smav * If this is a read, we can now send the data to the user. 908269123Smav */ 909269123Smav if ((beio->bio_cmd == BIO_WRITE) || 910269123Smav (ARGS(io)->flags & CTL_LLF_VERIFY)) { 911269123Smav ctl_set_success(&io->scsiio); 912269123Smav ctl_complete_beio(beio); 913269123Smav } else { 914275058Smav if ((ARGS(io)->flags & CTL_LLF_READ) && 915275058Smav beio->beio_cont == NULL) 916275058Smav ctl_set_success(&io->scsiio); 917269123Smav#ifdef CTL_TIME_IO 918269123Smav getbintime(&io->io_hdr.dma_start_bt); 919269123Smav#endif 920269123Smav ctl_datamove(io); 921269123Smav } 922269123Smav} 923269123Smav 924269123Smavstatic void 925275474Smavctl_be_block_gls_zvol(struct ctl_be_block_lun *be_lun, 926275474Smav struct ctl_be_block_io *beio) 927275474Smav{ 928275474Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 929275474Smav union ctl_io *io = beio->io; 930275474Smav struct ctl_lba_len_flags *lbalen = ARGS(io); 931275474Smav struct scsi_get_lba_status_data *data; 932275474Smav off_t roff, off; 933275474Smav int error, status; 934275474Smav 935275474Smav DPRINTF("entered\n"); 936275474Smav 937275474Smav off = roff = ((off_t)lbalen->lba) << be_lun->blocksize_shift; 938275474Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKHOLE, 939275474Smav (caddr_t)&off, FREAD, curthread); 940275474Smav if (error == 0 && off > roff) 941275474Smav status = 0; /* mapped up to off */ 942275474Smav else { 943275474Smav error = (*dev_data->csw->d_ioctl)(dev_data->cdev, FIOSEEKDATA, 944275474Smav (caddr_t)&off, FREAD, curthread); 945275474Smav if (error == 0 && off > roff) 946275474Smav status = 1; /* deallocated up to off */ 947275474Smav else { 948275474Smav status = 0; /* unknown up to the end */ 949275474Smav off = be_lun->size_bytes; 950275474Smav } 951275474Smav } 952275474Smav 953275474Smav off >>= be_lun->blocksize_shift; 954275474Smav data = (struct scsi_get_lba_status_data *)io->scsiio.kern_data_ptr; 955275474Smav scsi_u64to8b(lbalen->lba, data->descr[0].addr); 956275474Smav scsi_ulto4b(MIN(UINT32_MAX, off - lbalen->lba), 957275474Smav data->descr[0].length); 958275474Smav data->descr[0].status = status; 959275474Smav 960275474Smav ctl_complete_beio(beio); 961275474Smav} 962275474Smav 963275474Smavstatic void 964229997Skenctl_be_block_flush_dev(struct ctl_be_block_lun *be_lun, 965229997Sken struct ctl_be_block_io *beio) 966229997Sken{ 967229997Sken struct bio *bio; 968229997Sken union ctl_io *io; 969229997Sken struct ctl_be_block_devdata *dev_data; 970229997Sken 971229997Sken dev_data = &be_lun->backend.dev; 972229997Sken io = beio->io; 973229997Sken 974229997Sken DPRINTF("entered\n"); 975229997Sken 976229997Sken /* This can't fail, it's a blocking allocation. */ 977229997Sken bio = g_alloc_bio(); 978229997Sken 979229997Sken bio->bio_cmd = BIO_FLUSH; 980229997Sken bio->bio_dev = dev_data->cdev; 981229997Sken bio->bio_offset = 0; 982229997Sken bio->bio_data = 0; 983229997Sken bio->bio_done = ctl_be_block_biodone; 984229997Sken bio->bio_caller1 = beio; 985229997Sken bio->bio_pblkno = 0; 986229997Sken 987229997Sken /* 988229997Sken * We don't need to acquire the LUN lock here, because we are only 989229997Sken * sending one bio, and so there is no other context to synchronize 990229997Sken * with. 991229997Sken */ 992229997Sken beio->num_bios_sent = 1; 993229997Sken beio->send_complete = 1; 994229997Sken 995229997Sken binuptime(&beio->ds_t0); 996267877Smav mtx_lock(&be_lun->io_lock); 997229997Sken devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 998267877Smav mtx_unlock(&be_lun->io_lock); 999229997Sken 1000229997Sken (*dev_data->csw->d_strategy)(bio); 1001229997Sken} 1002229997Sken 1003229997Skenstatic void 1004264274Smavctl_be_block_unmap_dev_range(struct ctl_be_block_lun *be_lun, 1005264274Smav struct ctl_be_block_io *beio, 1006264274Smav uint64_t off, uint64_t len, int last) 1007264274Smav{ 1008264274Smav struct bio *bio; 1009264274Smav struct ctl_be_block_devdata *dev_data; 1010264296Smav uint64_t maxlen; 1011264274Smav 1012264274Smav dev_data = &be_lun->backend.dev; 1013264296Smav maxlen = LONG_MAX - (LONG_MAX % be_lun->blocksize); 1014264274Smav while (len > 0) { 1015264274Smav bio = g_alloc_bio(); 1016264274Smav bio->bio_cmd = BIO_DELETE; 1017264274Smav bio->bio_dev = dev_data->cdev; 1018264274Smav bio->bio_offset = off; 1019264296Smav bio->bio_length = MIN(len, maxlen); 1020264274Smav bio->bio_data = 0; 1021264274Smav bio->bio_done = ctl_be_block_biodone; 1022264274Smav bio->bio_caller1 = beio; 1023264296Smav bio->bio_pblkno = off / be_lun->blocksize; 1024264274Smav 1025264274Smav off += bio->bio_length; 1026264274Smav len -= bio->bio_length; 1027264274Smav 1028267877Smav mtx_lock(&be_lun->io_lock); 1029264274Smav beio->num_bios_sent++; 1030264274Smav if (last && len == 0) 1031264274Smav beio->send_complete = 1; 1032267877Smav mtx_unlock(&be_lun->io_lock); 1033264274Smav 1034264274Smav (*dev_data->csw->d_strategy)(bio); 1035264274Smav } 1036264274Smav} 1037264274Smav 1038264274Smavstatic void 1039264274Smavctl_be_block_unmap_dev(struct ctl_be_block_lun *be_lun, 1040264274Smav struct ctl_be_block_io *beio) 1041264274Smav{ 1042264274Smav union ctl_io *io; 1043264274Smav struct ctl_be_block_devdata *dev_data; 1044267515Smav struct ctl_ptr_len_flags *ptrlen; 1045264274Smav struct scsi_unmap_desc *buf, *end; 1046264274Smav uint64_t len; 1047264274Smav 1048264274Smav dev_data = &be_lun->backend.dev; 1049264274Smav io = beio->io; 1050264274Smav 1051264274Smav DPRINTF("entered\n"); 1052264274Smav 1053264274Smav binuptime(&beio->ds_t0); 1054267877Smav mtx_lock(&be_lun->io_lock); 1055264274Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1056267877Smav mtx_unlock(&be_lun->io_lock); 1057264274Smav 1058264274Smav if (beio->io_offset == -1) { 1059264274Smav beio->io_len = 0; 1060267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1061267515Smav buf = (struct scsi_unmap_desc *)ptrlen->ptr; 1062267515Smav end = buf + ptrlen->len / sizeof(*buf); 1063264274Smav for (; buf < end; buf++) { 1064264274Smav len = (uint64_t)scsi_4btoul(buf->length) * 1065264274Smav be_lun->blocksize; 1066264274Smav beio->io_len += len; 1067264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1068264274Smav scsi_8btou64(buf->lba) * be_lun->blocksize, len, 1069264283Smav (end - buf < 2) ? TRUE : FALSE); 1070264274Smav } 1071264274Smav } else 1072264274Smav ctl_be_block_unmap_dev_range(be_lun, beio, 1073264274Smav beio->io_offset, beio->io_len, TRUE); 1074264274Smav} 1075264274Smav 1076264274Smavstatic void 1077229997Skenctl_be_block_dispatch_dev(struct ctl_be_block_lun *be_lun, 1078229997Sken struct ctl_be_block_io *beio) 1079229997Sken{ 1080267877Smav TAILQ_HEAD(, bio) queue = TAILQ_HEAD_INITIALIZER(queue); 1081229997Sken int i; 1082229997Sken struct bio *bio; 1083229997Sken struct ctl_be_block_devdata *dev_data; 1084229997Sken off_t cur_offset; 1085229997Sken int max_iosize; 1086229997Sken 1087229997Sken DPRINTF("entered\n"); 1088229997Sken 1089229997Sken dev_data = &be_lun->backend.dev; 1090229997Sken 1091229997Sken /* 1092229997Sken * We have to limit our I/O size to the maximum supported by the 1093229997Sken * backend device. Hopefully it is MAXPHYS. If the driver doesn't 1094229997Sken * set it properly, use DFLTPHYS. 1095229997Sken */ 1096229997Sken max_iosize = dev_data->cdev->si_iosize_max; 1097229997Sken if (max_iosize < PAGE_SIZE) 1098229997Sken max_iosize = DFLTPHYS; 1099229997Sken 1100229997Sken cur_offset = beio->io_offset; 1101229997Sken for (i = 0; i < beio->num_segs; i++) { 1102229997Sken size_t cur_size; 1103229997Sken uint8_t *cur_ptr; 1104229997Sken 1105229997Sken cur_size = beio->sg_segs[i].len; 1106229997Sken cur_ptr = beio->sg_segs[i].addr; 1107229997Sken 1108229997Sken while (cur_size > 0) { 1109229997Sken /* This can't fail, it's a blocking allocation. */ 1110229997Sken bio = g_alloc_bio(); 1111229997Sken 1112229997Sken KASSERT(bio != NULL, ("g_alloc_bio() failed!\n")); 1113229997Sken 1114229997Sken bio->bio_cmd = beio->bio_cmd; 1115229997Sken bio->bio_dev = dev_data->cdev; 1116229997Sken bio->bio_caller1 = beio; 1117229997Sken bio->bio_length = min(cur_size, max_iosize); 1118229997Sken bio->bio_offset = cur_offset; 1119229997Sken bio->bio_data = cur_ptr; 1120229997Sken bio->bio_done = ctl_be_block_biodone; 1121229997Sken bio->bio_pblkno = cur_offset / be_lun->blocksize; 1122229997Sken 1123229997Sken cur_offset += bio->bio_length; 1124229997Sken cur_ptr += bio->bio_length; 1125229997Sken cur_size -= bio->bio_length; 1126229997Sken 1127267877Smav TAILQ_INSERT_TAIL(&queue, bio, bio_queue); 1128229997Sken beio->num_bios_sent++; 1129229997Sken } 1130229997Sken } 1131267877Smav binuptime(&beio->ds_t0); 1132267877Smav mtx_lock(&be_lun->io_lock); 1133267877Smav devstat_start_transaction(be_lun->disk_stats, &beio->ds_t0); 1134267877Smav beio->send_complete = 1; 1135267877Smav mtx_unlock(&be_lun->io_lock); 1136267877Smav 1137267877Smav /* 1138267877Smav * Fire off all allocated requests! 1139267877Smav */ 1140267877Smav while ((bio = TAILQ_FIRST(&queue)) != NULL) { 1141267877Smav TAILQ_REMOVE(&queue, bio, bio_queue); 1142267877Smav (*dev_data->csw->d_strategy)(bio); 1143267877Smav } 1144229997Sken} 1145229997Sken 1146274154Smavstatic uint64_t 1147274154Smavctl_be_block_getattr_dev(struct ctl_be_block_lun *be_lun, const char *attrname) 1148274154Smav{ 1149274154Smav struct ctl_be_block_devdata *dev_data = &be_lun->backend.dev; 1150274154Smav struct diocgattr_arg arg; 1151274154Smav int error; 1152274154Smav 1153274154Smav if (dev_data->csw == NULL || dev_data->csw->d_ioctl == NULL) 1154274154Smav return (UINT64_MAX); 1155274154Smav strlcpy(arg.name, attrname, sizeof(arg.name)); 1156274154Smav arg.len = sizeof(arg.value.off); 1157274154Smav error = dev_data->csw->d_ioctl(dev_data->cdev, 1158274154Smav DIOCGATTR, (caddr_t)&arg, FREAD, curthread); 1159274154Smav if (error != 0) 1160274154Smav return (UINT64_MAX); 1161274154Smav return (arg.value.off); 1162274154Smav} 1163274154Smav 1164229997Skenstatic void 1165286353Smavctl_be_block_cw_dispatch_sync(struct ctl_be_block_lun *be_lun, 1166286353Smav union ctl_io *io) 1167286353Smav{ 1168286353Smav struct ctl_be_block_io *beio; 1169286353Smav struct ctl_lba_len_flags *lbalen; 1170286353Smav 1171286353Smav DPRINTF("entered\n"); 1172286353Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1173286353Smav lbalen = (struct ctl_lba_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1174286353Smav 1175286353Smav beio->io_len = lbalen->len * be_lun->blocksize; 1176286353Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1177286353Smav beio->io_arg = (lbalen->flags & SSC_IMMED) != 0; 1178286353Smav beio->bio_cmd = BIO_FLUSH; 1179286353Smav beio->ds_trans_type = DEVSTAT_NO_DATA; 1180286353Smav DPRINTF("SYNC\n"); 1181286353Smav be_lun->lun_flush(be_lun, beio); 1182286353Smav} 1183286353Smav 1184286353Smavstatic void 1185264274Smavctl_be_block_cw_done_ws(struct ctl_be_block_io *beio) 1186264274Smav{ 1187264274Smav union ctl_io *io; 1188264274Smav 1189264274Smav io = beio->io; 1190264274Smav ctl_free_beio(beio); 1191267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1192267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1193267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1194264274Smav ctl_config_write_done(io); 1195264274Smav return; 1196264274Smav } 1197264274Smav 1198264274Smav ctl_be_block_config_write(io); 1199264274Smav} 1200264274Smav 1201264274Smavstatic void 1202264274Smavctl_be_block_cw_dispatch_ws(struct ctl_be_block_lun *be_lun, 1203264274Smav union ctl_io *io) 1204264274Smav{ 1205264274Smav struct ctl_be_block_io *beio; 1206267515Smav struct ctl_lba_len_flags *lbalen; 1207278625Smav uint64_t len_left, lba; 1208278625Smav uint32_t pb, pbo, adj; 1209264274Smav int i, seglen; 1210264274Smav uint8_t *buf, *end; 1211264274Smav 1212264274Smav DPRINTF("entered\n"); 1213264274Smav 1214267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1215267537Smav lbalen = ARGS(beio->io); 1216264274Smav 1217271839Smav if (lbalen->flags & ~(SWS_LBDATA | SWS_UNMAP | SWS_ANCHOR | SWS_NDOB) || 1218269622Smav (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR) && be_lun->unmap == NULL)) { 1219264274Smav ctl_free_beio(beio); 1220264274Smav ctl_set_invalid_field(&io->scsiio, 1221264274Smav /*sks_valid*/ 1, 1222264274Smav /*command*/ 1, 1223264274Smav /*field*/ 1, 1224264274Smav /*bit_valid*/ 0, 1225264274Smav /*bit*/ 0); 1226264274Smav ctl_config_write_done(io); 1227264274Smav return; 1228264274Smav } 1229264274Smav 1230269622Smav if (lbalen->flags & (SWS_UNMAP | SWS_ANCHOR)) { 1231267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1232267515Smav beio->io_len = (uint64_t)lbalen->len * be_lun->blocksize; 1233264274Smav beio->bio_cmd = BIO_DELETE; 1234264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1235264274Smav 1236264274Smav be_lun->unmap(be_lun, beio); 1237264274Smav return; 1238264274Smav } 1239264274Smav 1240264274Smav beio->bio_cmd = BIO_WRITE; 1241264274Smav beio->ds_trans_type = DEVSTAT_WRITE; 1242264274Smav 1243264274Smav DPRINTF("WRITE SAME at LBA %jx len %u\n", 1244267515Smav (uintmax_t)lbalen->lba, lbalen->len); 1245264274Smav 1246278625Smav pb = be_lun->blocksize << be_lun->pblockexp; 1247278625Smav if (be_lun->pblockoff > 0) 1248278625Smav pbo = pb - be_lun->blocksize * be_lun->pblockoff; 1249278625Smav else 1250278625Smav pbo = 0; 1251267515Smav len_left = (uint64_t)lbalen->len * be_lun->blocksize; 1252264274Smav for (i = 0, lba = 0; i < CTLBLK_MAX_SEGS && len_left > 0; i++) { 1253264274Smav 1254264274Smav /* 1255264274Smav * Setup the S/G entry for this chunk. 1256264274Smav */ 1257264886Smav seglen = MIN(CTLBLK_MAX_SEG, len_left); 1258278619Smav if (pb > be_lun->blocksize) { 1259278619Smav adj = ((lbalen->lba + lba) * be_lun->blocksize + 1260278619Smav seglen - pbo) % pb; 1261278619Smav if (seglen > adj) 1262278619Smav seglen -= adj; 1263278619Smav else 1264278619Smav seglen -= seglen % be_lun->blocksize; 1265278619Smav } else 1266278619Smav seglen -= seglen % be_lun->blocksize; 1267264274Smav beio->sg_segs[i].len = seglen; 1268264274Smav beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1269264274Smav 1270264274Smav DPRINTF("segment %d addr %p len %zd\n", i, 1271264274Smav beio->sg_segs[i].addr, beio->sg_segs[i].len); 1272264274Smav 1273264274Smav beio->num_segs++; 1274264274Smav len_left -= seglen; 1275264274Smav 1276264274Smav buf = beio->sg_segs[i].addr; 1277264274Smav end = buf + seglen; 1278264274Smav for (; buf < end; buf += be_lun->blocksize) { 1279264274Smav memcpy(buf, io->scsiio.kern_data_ptr, be_lun->blocksize); 1280267515Smav if (lbalen->flags & SWS_LBDATA) 1281267515Smav scsi_ulto4b(lbalen->lba + lba, buf); 1282264274Smav lba++; 1283264274Smav } 1284264274Smav } 1285264274Smav 1286267515Smav beio->io_offset = lbalen->lba * be_lun->blocksize; 1287264274Smav beio->io_len = lba * be_lun->blocksize; 1288264274Smav 1289264274Smav /* We can not do all in one run. Correct and schedule rerun. */ 1290264274Smav if (len_left > 0) { 1291267515Smav lbalen->lba += lba; 1292267515Smav lbalen->len -= lba; 1293264274Smav beio->beio_cont = ctl_be_block_cw_done_ws; 1294264274Smav } 1295264274Smav 1296264274Smav be_lun->dispatch(be_lun, beio); 1297264274Smav} 1298264274Smav 1299264274Smavstatic void 1300264274Smavctl_be_block_cw_dispatch_unmap(struct ctl_be_block_lun *be_lun, 1301264274Smav union ctl_io *io) 1302264274Smav{ 1303264274Smav struct ctl_be_block_io *beio; 1304267515Smav struct ctl_ptr_len_flags *ptrlen; 1305264274Smav 1306264274Smav DPRINTF("entered\n"); 1307264274Smav 1308267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1309267515Smav ptrlen = (struct ctl_ptr_len_flags *)&io->io_hdr.ctl_private[CTL_PRIV_LBA_LEN]; 1310264274Smav 1311269622Smav if ((ptrlen->flags & ~SU_ANCHOR) != 0 || be_lun->unmap == NULL) { 1312264274Smav ctl_free_beio(beio); 1313264274Smav ctl_set_invalid_field(&io->scsiio, 1314264274Smav /*sks_valid*/ 0, 1315264274Smav /*command*/ 1, 1316264274Smav /*field*/ 0, 1317264274Smav /*bit_valid*/ 0, 1318264274Smav /*bit*/ 0); 1319264274Smav ctl_config_write_done(io); 1320264274Smav return; 1321264274Smav } 1322264274Smav 1323264274Smav beio->io_len = 0; 1324264274Smav beio->io_offset = -1; 1325264274Smav beio->bio_cmd = BIO_DELETE; 1326264274Smav beio->ds_trans_type = DEVSTAT_FREE; 1327267515Smav DPRINTF("UNMAP\n"); 1328264274Smav be_lun->unmap(be_lun, beio); 1329264274Smav} 1330264274Smav 1331264274Smavstatic void 1332275474Smavctl_be_block_cr_done(struct ctl_be_block_io *beio) 1333275474Smav{ 1334275474Smav union ctl_io *io; 1335275474Smav 1336275474Smav io = beio->io; 1337275474Smav ctl_free_beio(beio); 1338275474Smav ctl_config_read_done(io); 1339275474Smav} 1340275474Smav 1341275474Smavstatic void 1342275474Smavctl_be_block_cr_dispatch(struct ctl_be_block_lun *be_lun, 1343275474Smav union ctl_io *io) 1344275474Smav{ 1345275474Smav struct ctl_be_block_io *beio; 1346275474Smav struct ctl_be_block_softc *softc; 1347275474Smav 1348275474Smav DPRINTF("entered\n"); 1349275474Smav 1350275474Smav softc = be_lun->softc; 1351275474Smav beio = ctl_alloc_beio(softc); 1352275474Smav beio->io = io; 1353275474Smav beio->lun = be_lun; 1354275474Smav beio->beio_cont = ctl_be_block_cr_done; 1355275474Smav PRIV(io)->ptr = (void *)beio; 1356275474Smav 1357275474Smav switch (io->scsiio.cdb[0]) { 1358275474Smav case SERVICE_ACTION_IN: /* GET LBA STATUS */ 1359275474Smav beio->bio_cmd = -1; 1360275474Smav beio->ds_trans_type = DEVSTAT_NO_DATA; 1361275474Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1362275474Smav beio->io_len = 0; 1363275474Smav if (be_lun->get_lba_status) 1364275474Smav be_lun->get_lba_status(be_lun, beio); 1365275474Smav else 1366275474Smav ctl_be_block_cr_done(beio); 1367275474Smav break; 1368275474Smav default: 1369275474Smav panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1370275474Smav break; 1371275474Smav } 1372275474Smav} 1373275474Smav 1374275474Smavstatic void 1375264274Smavctl_be_block_cw_done(struct ctl_be_block_io *beio) 1376264274Smav{ 1377264274Smav union ctl_io *io; 1378264274Smav 1379264274Smav io = beio->io; 1380264274Smav ctl_free_beio(beio); 1381264274Smav ctl_config_write_done(io); 1382264274Smav} 1383264274Smav 1384264274Smavstatic void 1385229997Skenctl_be_block_cw_dispatch(struct ctl_be_block_lun *be_lun, 1386229997Sken union ctl_io *io) 1387229997Sken{ 1388229997Sken struct ctl_be_block_io *beio; 1389229997Sken struct ctl_be_block_softc *softc; 1390229997Sken 1391229997Sken DPRINTF("entered\n"); 1392229997Sken 1393229997Sken softc = be_lun->softc; 1394229997Sken beio = ctl_alloc_beio(softc); 1395229997Sken beio->io = io; 1396229997Sken beio->lun = be_lun; 1397264274Smav beio->beio_cont = ctl_be_block_cw_done; 1398286353Smav switch (io->scsiio.tag_type) { 1399286353Smav case CTL_TAG_ORDERED: 1400286353Smav beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1401286353Smav break; 1402286353Smav case CTL_TAG_HEAD_OF_QUEUE: 1403286353Smav beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1404286353Smav break; 1405286353Smav case CTL_TAG_UNTAGGED: 1406286353Smav case CTL_TAG_SIMPLE: 1407286353Smav case CTL_TAG_ACA: 1408286353Smav default: 1409286353Smav beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1410286353Smav break; 1411286353Smav } 1412267519Smav PRIV(io)->ptr = (void *)beio; 1413229997Sken 1414229997Sken switch (io->scsiio.cdb[0]) { 1415229997Sken case SYNCHRONIZE_CACHE: 1416229997Sken case SYNCHRONIZE_CACHE_16: 1417286353Smav ctl_be_block_cw_dispatch_sync(be_lun, io); 1418229997Sken break; 1419264274Smav case WRITE_SAME_10: 1420264274Smav case WRITE_SAME_16: 1421264274Smav ctl_be_block_cw_dispatch_ws(be_lun, io); 1422264274Smav break; 1423264274Smav case UNMAP: 1424264274Smav ctl_be_block_cw_dispatch_unmap(be_lun, io); 1425264274Smav break; 1426229997Sken default: 1427229997Sken panic("Unhandled CDB type %#x", io->scsiio.cdb[0]); 1428229997Sken break; 1429229997Sken } 1430229997Sken} 1431229997Sken 1432258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, start, "uint64_t"); 1433258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, start, "uint64_t"); 1434258622SavgSDT_PROBE_DEFINE1(cbb, kernel, read, alloc_done, "uint64_t"); 1435258622SavgSDT_PROBE_DEFINE1(cbb, kernel, write, alloc_done, "uint64_t"); 1436229997Sken 1437229997Skenstatic void 1438264886Smavctl_be_block_next(struct ctl_be_block_io *beio) 1439264886Smav{ 1440264886Smav struct ctl_be_block_lun *be_lun; 1441264886Smav union ctl_io *io; 1442264886Smav 1443264886Smav io = beio->io; 1444264886Smav be_lun = beio->lun; 1445264886Smav ctl_free_beio(beio); 1446267641Smav if ((io->io_hdr.flags & CTL_FLAG_ABORT) || 1447267641Smav ((io->io_hdr.status & CTL_STATUS_MASK) != CTL_STATUS_NONE && 1448267641Smav (io->io_hdr.status & CTL_STATUS_MASK) != CTL_SUCCESS)) { 1449267537Smav ctl_data_submit_done(io); 1450264886Smav return; 1451264886Smav } 1452264886Smav 1453264886Smav io->io_hdr.status &= ~CTL_STATUS_MASK; 1454264886Smav io->io_hdr.status |= CTL_STATUS_NONE; 1455264886Smav 1456267877Smav mtx_lock(&be_lun->queue_lock); 1457264886Smav /* 1458264886Smav * XXX KDM make sure that links is okay to use at this point. 1459264886Smav * Otherwise, we either need to add another field to ctl_io_hdr, 1460264886Smav * or deal with resource allocation here. 1461264886Smav */ 1462264886Smav STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1463267877Smav mtx_unlock(&be_lun->queue_lock); 1464264886Smav 1465264886Smav taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1466264886Smav} 1467264886Smav 1468264886Smavstatic void 1469229997Skenctl_be_block_dispatch(struct ctl_be_block_lun *be_lun, 1470229997Sken union ctl_io *io) 1471229997Sken{ 1472229997Sken struct ctl_be_block_io *beio; 1473229997Sken struct ctl_be_block_softc *softc; 1474267537Smav struct ctl_lba_len_flags *lbalen; 1475267519Smav struct ctl_ptr_len_flags *bptrlen; 1476267519Smav uint64_t len_left, lbas; 1477229997Sken int i; 1478229997Sken 1479229997Sken softc = be_lun->softc; 1480229997Sken 1481229997Sken DPRINTF("entered\n"); 1482229997Sken 1483267537Smav lbalen = ARGS(io); 1484267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1485267537Smav SDT_PROBE(cbb, kernel, write, start, 0, 0, 0, 0, 0); 1486267537Smav } else { 1487229997Sken SDT_PROBE(cbb, kernel, read, start, 0, 0, 0, 0, 0); 1488229997Sken } 1489229997Sken 1490229997Sken beio = ctl_alloc_beio(softc); 1491229997Sken beio->io = io; 1492229997Sken beio->lun = be_lun; 1493267519Smav bptrlen = PRIV(io); 1494267519Smav bptrlen->ptr = (void *)beio; 1495229997Sken 1496229997Sken switch (io->scsiio.tag_type) { 1497229997Sken case CTL_TAG_ORDERED: 1498229997Sken beio->ds_tag_type = DEVSTAT_TAG_ORDERED; 1499229997Sken break; 1500229997Sken case CTL_TAG_HEAD_OF_QUEUE: 1501229997Sken beio->ds_tag_type = DEVSTAT_TAG_HEAD; 1502229997Sken break; 1503229997Sken case CTL_TAG_UNTAGGED: 1504229997Sken case CTL_TAG_SIMPLE: 1505229997Sken case CTL_TAG_ACA: 1506229997Sken default: 1507229997Sken beio->ds_tag_type = DEVSTAT_TAG_SIMPLE; 1508229997Sken break; 1509229997Sken } 1510229997Sken 1511267537Smav if (lbalen->flags & CTL_LLF_WRITE) { 1512267537Smav beio->bio_cmd = BIO_WRITE; 1513267537Smav beio->ds_trans_type = DEVSTAT_WRITE; 1514267537Smav } else { 1515229997Sken beio->bio_cmd = BIO_READ; 1516229997Sken beio->ds_trans_type = DEVSTAT_READ; 1517229997Sken } 1518229997Sken 1519264886Smav DPRINTF("%s at LBA %jx len %u @%ju\n", 1520229997Sken (beio->bio_cmd == BIO_READ) ? "READ" : "WRITE", 1521267519Smav (uintmax_t)lbalen->lba, lbalen->len, bptrlen->len); 1522267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1523267537Smav lbas = CTLBLK_HALF_IO_SIZE; 1524267537Smav else 1525267537Smav lbas = CTLBLK_MAX_IO_SIZE; 1526267537Smav lbas = MIN(lbalen->len - bptrlen->len, lbas / be_lun->blocksize); 1527267519Smav beio->io_offset = (lbalen->lba + bptrlen->len) * be_lun->blocksize; 1528267519Smav beio->io_len = lbas * be_lun->blocksize; 1529267519Smav bptrlen->len += lbas; 1530229997Sken 1531264886Smav for (i = 0, len_left = beio->io_len; len_left > 0; i++) { 1532264886Smav KASSERT(i < CTLBLK_MAX_SEGS, ("Too many segs (%d >= %d)", 1533264886Smav i, CTLBLK_MAX_SEGS)); 1534229997Sken 1535229997Sken /* 1536229997Sken * Setup the S/G entry for this chunk. 1537229997Sken */ 1538264886Smav beio->sg_segs[i].len = min(CTLBLK_MAX_SEG, len_left); 1539229997Sken beio->sg_segs[i].addr = uma_zalloc(be_lun->lun_zone, M_WAITOK); 1540229997Sken 1541229997Sken DPRINTF("segment %d addr %p len %zd\n", i, 1542229997Sken beio->sg_segs[i].addr, beio->sg_segs[i].len); 1543229997Sken 1544267537Smav /* Set up second segment for compare operation. */ 1545267537Smav if (lbalen->flags & CTL_LLF_COMPARE) { 1546267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].len = 1547267537Smav beio->sg_segs[i].len; 1548267537Smav beio->sg_segs[i + CTLBLK_HALF_SEGS].addr = 1549267537Smav uma_zalloc(be_lun->lun_zone, M_WAITOK); 1550267537Smav } 1551267537Smav 1552229997Sken beio->num_segs++; 1553229997Sken len_left -= beio->sg_segs[i].len; 1554229997Sken } 1555267519Smav if (bptrlen->len < lbalen->len) 1556264886Smav beio->beio_cont = ctl_be_block_next; 1557264886Smav io->scsiio.be_move_done = ctl_be_block_move_done; 1558267537Smav /* For compare we have separate S/G lists for read and datamove. */ 1559267537Smav if (lbalen->flags & CTL_LLF_COMPARE) 1560267537Smav io->scsiio.kern_data_ptr = (uint8_t *)&beio->sg_segs[CTLBLK_HALF_SEGS]; 1561267537Smav else 1562267537Smav io->scsiio.kern_data_ptr = (uint8_t *)beio->sg_segs; 1563264886Smav io->scsiio.kern_data_len = beio->io_len; 1564264886Smav io->scsiio.kern_data_resid = 0; 1565264886Smav io->scsiio.kern_sg_entries = beio->num_segs; 1566264886Smav io->io_hdr.flags |= CTL_FLAG_ALLOCATED | CTL_FLAG_KDPTR_SGLIST; 1567229997Sken 1568229997Sken /* 1569229997Sken * For the read case, we need to read the data into our buffers and 1570229997Sken * then we can send it back to the user. For the write case, we 1571229997Sken * need to get the data from the user first. 1572229997Sken */ 1573229997Sken if (beio->bio_cmd == BIO_READ) { 1574229997Sken SDT_PROBE(cbb, kernel, read, alloc_done, 0, 0, 0, 0, 0); 1575229997Sken be_lun->dispatch(be_lun, beio); 1576229997Sken } else { 1577229997Sken SDT_PROBE(cbb, kernel, write, alloc_done, 0, 0, 0, 0, 0); 1578229997Sken#ifdef CTL_TIME_IO 1579229997Sken getbintime(&io->io_hdr.dma_start_bt); 1580229997Sken#endif 1581229997Sken ctl_datamove(io); 1582229997Sken } 1583229997Sken} 1584229997Sken 1585229997Skenstatic void 1586229997Skenctl_be_block_worker(void *context, int pending) 1587229997Sken{ 1588229997Sken struct ctl_be_block_lun *be_lun; 1589229997Sken struct ctl_be_block_softc *softc; 1590229997Sken union ctl_io *io; 1591229997Sken 1592229997Sken be_lun = (struct ctl_be_block_lun *)context; 1593229997Sken softc = be_lun->softc; 1594229997Sken 1595229997Sken DPRINTF("entered\n"); 1596229997Sken 1597267877Smav mtx_lock(&be_lun->queue_lock); 1598229997Sken for (;;) { 1599229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->datamove_queue); 1600229997Sken if (io != NULL) { 1601229997Sken struct ctl_be_block_io *beio; 1602229997Sken 1603229997Sken DPRINTF("datamove queue\n"); 1604229997Sken 1605229997Sken STAILQ_REMOVE(&be_lun->datamove_queue, &io->io_hdr, 1606229997Sken ctl_io_hdr, links); 1607229997Sken 1608267877Smav mtx_unlock(&be_lun->queue_lock); 1609229997Sken 1610267519Smav beio = (struct ctl_be_block_io *)PRIV(io)->ptr; 1611229997Sken 1612229997Sken be_lun->dispatch(be_lun, beio); 1613229997Sken 1614267877Smav mtx_lock(&be_lun->queue_lock); 1615229997Sken continue; 1616229997Sken } 1617229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_write_queue); 1618229997Sken if (io != NULL) { 1619229997Sken DPRINTF("config write queue\n"); 1620229997Sken STAILQ_REMOVE(&be_lun->config_write_queue, &io->io_hdr, 1621229997Sken ctl_io_hdr, links); 1622267877Smav mtx_unlock(&be_lun->queue_lock); 1623229997Sken ctl_be_block_cw_dispatch(be_lun, io); 1624267877Smav mtx_lock(&be_lun->queue_lock); 1625229997Sken continue; 1626229997Sken } 1627275474Smav io = (union ctl_io *)STAILQ_FIRST(&be_lun->config_read_queue); 1628275474Smav if (io != NULL) { 1629275474Smav DPRINTF("config read queue\n"); 1630275474Smav STAILQ_REMOVE(&be_lun->config_read_queue, &io->io_hdr, 1631275474Smav ctl_io_hdr, links); 1632275474Smav mtx_unlock(&be_lun->queue_lock); 1633275474Smav ctl_be_block_cr_dispatch(be_lun, io); 1634275474Smav mtx_lock(&be_lun->queue_lock); 1635275474Smav continue; 1636275474Smav } 1637229997Sken io = (union ctl_io *)STAILQ_FIRST(&be_lun->input_queue); 1638229997Sken if (io != NULL) { 1639229997Sken DPRINTF("input queue\n"); 1640229997Sken 1641229997Sken STAILQ_REMOVE(&be_lun->input_queue, &io->io_hdr, 1642229997Sken ctl_io_hdr, links); 1643267877Smav mtx_unlock(&be_lun->queue_lock); 1644229997Sken 1645229997Sken /* 1646229997Sken * We must drop the lock, since this routine and 1647229997Sken * its children may sleep. 1648229997Sken */ 1649229997Sken ctl_be_block_dispatch(be_lun, io); 1650229997Sken 1651267877Smav mtx_lock(&be_lun->queue_lock); 1652229997Sken continue; 1653229997Sken } 1654229997Sken 1655229997Sken /* 1656229997Sken * If we get here, there is no work left in the queues, so 1657229997Sken * just break out and let the task queue go to sleep. 1658229997Sken */ 1659229997Sken break; 1660229997Sken } 1661267877Smav mtx_unlock(&be_lun->queue_lock); 1662229997Sken} 1663229997Sken 1664229997Sken/* 1665229997Sken * Entry point from CTL to the backend for I/O. We queue everything to a 1666229997Sken * work thread, so this just puts the I/O on a queue and wakes up the 1667229997Sken * thread. 1668229997Sken */ 1669229997Skenstatic int 1670229997Skenctl_be_block_submit(union ctl_io *io) 1671229997Sken{ 1672229997Sken struct ctl_be_block_lun *be_lun; 1673229997Sken struct ctl_be_lun *ctl_be_lun; 1674229997Sken 1675229997Sken DPRINTF("entered\n"); 1676229997Sken 1677229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 1678229997Sken CTL_PRIV_BACKEND_LUN].ptr; 1679229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 1680229997Sken 1681229997Sken /* 1682229997Sken * Make sure we only get SCSI I/O. 1683229997Sken */ 1684229997Sken KASSERT(io->io_hdr.io_type == CTL_IO_SCSI, ("Non-SCSI I/O (type " 1685229997Sken "%#x) encountered", io->io_hdr.io_type)); 1686229997Sken 1687267519Smav PRIV(io)->len = 0; 1688267519Smav 1689267877Smav mtx_lock(&be_lun->queue_lock); 1690229997Sken /* 1691229997Sken * XXX KDM make sure that links is okay to use at this point. 1692229997Sken * Otherwise, we either need to add another field to ctl_io_hdr, 1693229997Sken * or deal with resource allocation here. 1694229997Sken */ 1695229997Sken STAILQ_INSERT_TAIL(&be_lun->input_queue, &io->io_hdr, links); 1696267877Smav mtx_unlock(&be_lun->queue_lock); 1697229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 1698229997Sken 1699267514Smav return (CTL_RETVAL_COMPLETE); 1700229997Sken} 1701229997Sken 1702229997Skenstatic int 1703229997Skenctl_be_block_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, 1704229997Sken int flag, struct thread *td) 1705229997Sken{ 1706229997Sken struct ctl_be_block_softc *softc; 1707229997Sken int error; 1708229997Sken 1709229997Sken softc = &backend_block_softc; 1710229997Sken 1711229997Sken error = 0; 1712229997Sken 1713229997Sken switch (cmd) { 1714229997Sken case CTL_LUN_REQ: { 1715229997Sken struct ctl_lun_req *lun_req; 1716229997Sken 1717229997Sken lun_req = (struct ctl_lun_req *)addr; 1718229997Sken 1719229997Sken switch (lun_req->reqtype) { 1720229997Sken case CTL_LUNREQ_CREATE: 1721229997Sken error = ctl_be_block_create(softc, lun_req); 1722229997Sken break; 1723229997Sken case CTL_LUNREQ_RM: 1724229997Sken error = ctl_be_block_rm(softc, lun_req); 1725229997Sken break; 1726232604Strasz case CTL_LUNREQ_MODIFY: 1727232604Strasz error = ctl_be_block_modify(softc, lun_req); 1728232604Strasz break; 1729229997Sken default: 1730229997Sken lun_req->status = CTL_LUN_ERROR; 1731229997Sken snprintf(lun_req->error_str, sizeof(lun_req->error_str), 1732272911Smav "invalid LUN request type %d", 1733229997Sken lun_req->reqtype); 1734229997Sken break; 1735229997Sken } 1736229997Sken break; 1737229997Sken } 1738229997Sken default: 1739229997Sken error = ENOTTY; 1740229997Sken break; 1741229997Sken } 1742229997Sken 1743229997Sken return (error); 1744229997Sken} 1745229997Sken 1746229997Skenstatic int 1747229997Skenctl_be_block_open_file(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1748229997Sken{ 1749229997Sken struct ctl_be_block_filedata *file_data; 1750229997Sken struct ctl_lun_create_params *params; 1751275865Smav char *value; 1752229997Sken struct vattr vattr; 1753275865Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1754229997Sken int error; 1755229997Sken 1756229997Sken error = 0; 1757229997Sken file_data = &be_lun->backend.file; 1758272911Smav params = &be_lun->params; 1759229997Sken 1760229997Sken be_lun->dev_type = CTL_BE_BLOCK_FILE; 1761229997Sken be_lun->dispatch = ctl_be_block_dispatch_file; 1762229997Sken be_lun->lun_flush = ctl_be_block_flush_file; 1763275474Smav be_lun->get_lba_status = ctl_be_block_gls_file; 1764275481Smav be_lun->getattr = ctl_be_block_getattr_file; 1765229997Sken 1766229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 1767229997Sken if (error != 0) { 1768229997Sken snprintf(req->error_str, sizeof(req->error_str), 1769229997Sken "error calling VOP_GETATTR() for file %s", 1770229997Sken be_lun->dev_path); 1771229997Sken return (error); 1772229997Sken } 1773229997Sken 1774229997Sken /* 1775229997Sken * Verify that we have the ability to upgrade to exclusive 1776229997Sken * access on this file so we can trap errors at open instead 1777229997Sken * of reporting them during first access. 1778229997Sken */ 1779229997Sken if (VOP_ISLOCKED(be_lun->vn) != LK_EXCLUSIVE) { 1780229997Sken vn_lock(be_lun->vn, LK_UPGRADE | LK_RETRY); 1781229997Sken if (be_lun->vn->v_iflag & VI_DOOMED) { 1782229997Sken error = EBADF; 1783229997Sken snprintf(req->error_str, sizeof(req->error_str), 1784229997Sken "error locking file %s", be_lun->dev_path); 1785229997Sken return (error); 1786229997Sken } 1787229997Sken } 1788229997Sken 1789229997Sken 1790229997Sken file_data->cred = crhold(curthread->td_ucred); 1791232604Strasz if (params->lun_size_bytes != 0) 1792232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1793232604Strasz else 1794232604Strasz be_lun->size_bytes = vattr.va_size; 1795229997Sken /* 1796229997Sken * We set the multi thread flag for file operations because all 1797229997Sken * filesystems (in theory) are capable of allowing multiple readers 1798229997Sken * of a file at once. So we want to get the maximum possible 1799229997Sken * concurrency. 1800229997Sken */ 1801229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_MULTI_THREAD; 1802229997Sken 1803229997Sken /* 1804273029Smav * For files we can use any logical block size. Prefer 512 bytes 1805273029Smav * for compatibility reasons. If file's vattr.va_blocksize 1806273029Smav * (preferred I/O block size) is bigger and multiple to chosen 1807273029Smav * logical block size -- report it as physical block size. 1808229997Sken */ 1809229997Sken if (params->blocksize_bytes != 0) 1810229997Sken be_lun->blocksize = params->blocksize_bytes; 1811229997Sken else 1812229997Sken be_lun->blocksize = 512; 1813275865Smav 1814275865Smav us = ps = vattr.va_blocksize; 1815275865Smav uo = po = 0; 1816275865Smav 1817275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1818275865Smav if (value != NULL) 1819275865Smav ctl_expand_number(value, &ps); 1820275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1821275865Smav if (value != NULL) 1822275865Smav ctl_expand_number(value, &po); 1823275865Smav pss = ps / be_lun->blocksize; 1824275865Smav pos = po / be_lun->blocksize; 1825275865Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 1826275865Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 1827273029Smav be_lun->pblockexp = fls(pss) - 1; 1828275865Smav be_lun->pblockoff = (pss - pos) % pss; 1829273029Smav } 1830229997Sken 1831275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 1832275865Smav if (value != NULL) 1833275865Smav ctl_expand_number(value, &us); 1834275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 1835275865Smav if (value != NULL) 1836275865Smav ctl_expand_number(value, &uo); 1837275865Smav uss = us / be_lun->blocksize; 1838275865Smav uos = uo / be_lun->blocksize; 1839275865Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 1840275865Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 1841275865Smav be_lun->ublockexp = fls(uss) - 1; 1842275865Smav be_lun->ublockoff = (uss - uos) % uss; 1843275865Smav } 1844275865Smav 1845229997Sken /* 1846229997Sken * Sanity check. The media size has to be at least one 1847229997Sken * sector long. 1848229997Sken */ 1849229997Sken if (be_lun->size_bytes < be_lun->blocksize) { 1850229997Sken error = EINVAL; 1851229997Sken snprintf(req->error_str, sizeof(req->error_str), 1852229997Sken "file %s size %ju < block size %u", be_lun->dev_path, 1853229997Sken (uintmax_t)be_lun->size_bytes, be_lun->blocksize); 1854229997Sken } 1855275920Smav 1856275920Smav be_lun->opttxferlen = CTLBLK_MAX_IO_SIZE / be_lun->blocksize; 1857229997Sken return (error); 1858229997Sken} 1859229997Sken 1860229997Skenstatic int 1861229997Skenctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 1862229997Sken{ 1863229997Sken struct ctl_lun_create_params *params; 1864229997Sken struct vattr vattr; 1865229997Sken struct cdev *dev; 1866229997Sken struct cdevsw *devsw; 1867275865Smav char *value; 1868278672Smav int error, atomic, maxio, unmap; 1869275865Smav off_t ps, pss, po, pos, us, uss, uo, uos; 1870229997Sken 1871272911Smav params = &be_lun->params; 1872229997Sken 1873229997Sken be_lun->dev_type = CTL_BE_BLOCK_DEV; 1874229997Sken be_lun->backend.dev.cdev = be_lun->vn->v_rdev; 1875229997Sken be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev, 1876229997Sken &be_lun->backend.dev.dev_ref); 1877229997Sken if (be_lun->backend.dev.csw == NULL) 1878229997Sken panic("Unable to retrieve device switch"); 1879275474Smav if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) { 1880269123Smav be_lun->dispatch = ctl_be_block_dispatch_zvol; 1881275474Smav be_lun->get_lba_status = ctl_be_block_gls_zvol; 1882275920Smav atomic = maxio = CTLBLK_MAX_IO_SIZE; 1883275920Smav } else { 1884269123Smav be_lun->dispatch = ctl_be_block_dispatch_dev; 1885275920Smav atomic = 0; 1886275920Smav maxio = be_lun->backend.dev.cdev->si_iosize_max; 1887275920Smav if (maxio <= 0) 1888275920Smav maxio = DFLTPHYS; 1889275920Smav if (maxio > CTLBLK_MAX_IO_SIZE) 1890275920Smav maxio = CTLBLK_MAX_IO_SIZE; 1891275920Smav } 1892269123Smav be_lun->lun_flush = ctl_be_block_flush_dev; 1893274154Smav be_lun->getattr = ctl_be_block_getattr_dev; 1894229997Sken 1895229997Sken error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED); 1896229997Sken if (error) { 1897229997Sken snprintf(req->error_str, sizeof(req->error_str), 1898272911Smav "error getting vnode attributes for device %s", 1899272911Smav be_lun->dev_path); 1900229997Sken return (error); 1901229997Sken } 1902229997Sken 1903229997Sken dev = be_lun->vn->v_rdev; 1904229997Sken devsw = dev->si_devsw; 1905229997Sken if (!devsw->d_ioctl) { 1906229997Sken snprintf(req->error_str, sizeof(req->error_str), 1907272911Smav "no d_ioctl for device %s!", 1908229997Sken be_lun->dev_path); 1909229997Sken return (ENODEV); 1910229997Sken } 1911229997Sken 1912229997Sken error = devsw->d_ioctl(dev, DIOCGSECTORSIZE, 1913229997Sken (caddr_t)&be_lun->blocksize, FREAD, 1914229997Sken curthread); 1915229997Sken if (error) { 1916229997Sken snprintf(req->error_str, sizeof(req->error_str), 1917272911Smav "error %d returned for DIOCGSECTORSIZE ioctl " 1918272911Smav "on %s!", error, be_lun->dev_path); 1919229997Sken return (error); 1920229997Sken } 1921229997Sken 1922229997Sken /* 1923229997Sken * If the user has asked for a blocksize that is greater than the 1924229997Sken * backing device's blocksize, we can do it only if the blocksize 1925229997Sken * the user is asking for is an even multiple of the underlying 1926229997Sken * device's blocksize. 1927229997Sken */ 1928229997Sken if ((params->blocksize_bytes != 0) 1929229997Sken && (params->blocksize_bytes > be_lun->blocksize)) { 1930229997Sken uint32_t bs_multiple, tmp_blocksize; 1931229997Sken 1932229997Sken bs_multiple = params->blocksize_bytes / be_lun->blocksize; 1933229997Sken 1934229997Sken tmp_blocksize = bs_multiple * be_lun->blocksize; 1935229997Sken 1936229997Sken if (tmp_blocksize == params->blocksize_bytes) { 1937229997Sken be_lun->blocksize = params->blocksize_bytes; 1938229997Sken } else { 1939229997Sken snprintf(req->error_str, sizeof(req->error_str), 1940272911Smav "requested blocksize %u is not an even " 1941229997Sken "multiple of backing device blocksize %u", 1942272911Smav params->blocksize_bytes, 1943229997Sken be_lun->blocksize); 1944229997Sken return (EINVAL); 1945229997Sken 1946229997Sken } 1947229997Sken } else if ((params->blocksize_bytes != 0) 1948229997Sken && (params->blocksize_bytes != be_lun->blocksize)) { 1949229997Sken snprintf(req->error_str, sizeof(req->error_str), 1950272911Smav "requested blocksize %u < backing device " 1951272911Smav "blocksize %u", params->blocksize_bytes, 1952229997Sken be_lun->blocksize); 1953229997Sken return (EINVAL); 1954229997Sken } 1955229997Sken 1956229997Sken error = devsw->d_ioctl(dev, DIOCGMEDIASIZE, 1957229997Sken (caddr_t)&be_lun->size_bytes, FREAD, 1958229997Sken curthread); 1959229997Sken if (error) { 1960229997Sken snprintf(req->error_str, sizeof(req->error_str), 1961272911Smav "error %d returned for DIOCGMEDIASIZE " 1962272911Smav " ioctl on %s!", error, 1963232604Strasz be_lun->dev_path); 1964229997Sken return (error); 1965229997Sken } 1966229997Sken 1967232604Strasz if (params->lun_size_bytes != 0) { 1968232604Strasz if (params->lun_size_bytes > be_lun->size_bytes) { 1969232604Strasz snprintf(req->error_str, sizeof(req->error_str), 1970272911Smav "requested LUN size %ju > backing device " 1971272911Smav "size %ju", 1972232604Strasz (uintmax_t)params->lun_size_bytes, 1973232604Strasz (uintmax_t)be_lun->size_bytes); 1974232604Strasz return (EINVAL); 1975232604Strasz } 1976232604Strasz 1977232604Strasz be_lun->size_bytes = params->lun_size_bytes; 1978232604Strasz } 1979232604Strasz 1980264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPESIZE, 1981264191Smav (caddr_t)&ps, FREAD, curthread); 1982264191Smav if (error) 1983264191Smav ps = po = 0; 1984264191Smav else { 1985264191Smav error = devsw->d_ioctl(dev, DIOCGSTRIPEOFFSET, 1986264191Smav (caddr_t)&po, FREAD, curthread); 1987264191Smav if (error) 1988264191Smav po = 0; 1989264191Smav } 1990275865Smav us = ps; 1991275865Smav uo = po; 1992275865Smav 1993275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblocksize"); 1994275865Smav if (value != NULL) 1995275865Smav ctl_expand_number(value, &ps); 1996275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "pblockoffset"); 1997275865Smav if (value != NULL) 1998275865Smav ctl_expand_number(value, &po); 1999264191Smav pss = ps / be_lun->blocksize; 2000264191Smav pos = po / be_lun->blocksize; 2001264191Smav if ((pss > 0) && (pss * be_lun->blocksize == ps) && (pss >= pos) && 2002264191Smav ((pss & (pss - 1)) == 0) && (pos * be_lun->blocksize == po)) { 2003264191Smav be_lun->pblockexp = fls(pss) - 1; 2004264191Smav be_lun->pblockoff = (pss - pos) % pss; 2005264191Smav } 2006264191Smav 2007275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublocksize"); 2008275865Smav if (value != NULL) 2009275865Smav ctl_expand_number(value, &us); 2010275865Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "ublockoffset"); 2011275865Smav if (value != NULL) 2012275865Smav ctl_expand_number(value, &uo); 2013275865Smav uss = us / be_lun->blocksize; 2014275865Smav uos = uo / be_lun->blocksize; 2015275865Smav if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) && 2016275865Smav ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) { 2017275865Smav be_lun->ublockexp = fls(uss) - 1; 2018275865Smav be_lun->ublockoff = (uss - uos) % uss; 2019275865Smav } 2020275865Smav 2021275920Smav be_lun->atomicblock = atomic / be_lun->blocksize; 2022275920Smav be_lun->opttxferlen = maxio / be_lun->blocksize; 2023278672Smav 2024278672Smav if (be_lun->dispatch == ctl_be_block_dispatch_zvol) { 2025278672Smav unmap = 1; 2026278672Smav } else { 2027278672Smav struct diocgattr_arg arg; 2028278672Smav 2029278672Smav strlcpy(arg.name, "GEOM::candelete", sizeof(arg.name)); 2030278672Smav arg.len = sizeof(arg.value.i); 2031278672Smav error = devsw->d_ioctl(dev, DIOCGATTR, 2032278672Smav (caddr_t)&arg, FREAD, curthread); 2033278672Smav unmap = (error == 0) ? arg.value.i : 0; 2034278672Smav } 2035278672Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "unmap"); 2036278672Smav if (value != NULL) 2037278672Smav unmap = (strcmp(value, "on") == 0); 2038278672Smav if (unmap) 2039278672Smav be_lun->unmap = ctl_be_block_unmap_dev; 2040278672Smav 2041229997Sken return (0); 2042229997Sken} 2043229997Sken 2044229997Skenstatic int 2045229997Skenctl_be_block_close(struct ctl_be_block_lun *be_lun) 2046229997Sken{ 2047229997Sken DROP_GIANT(); 2048229997Sken if (be_lun->vn) { 2049229997Sken int flags = FREAD | FWRITE; 2050229997Sken 2051229997Sken switch (be_lun->dev_type) { 2052229997Sken case CTL_BE_BLOCK_DEV: 2053229997Sken if (be_lun->backend.dev.csw) { 2054229997Sken dev_relthread(be_lun->backend.dev.cdev, 2055229997Sken be_lun->backend.dev.dev_ref); 2056229997Sken be_lun->backend.dev.csw = NULL; 2057229997Sken be_lun->backend.dev.cdev = NULL; 2058229997Sken } 2059229997Sken break; 2060229997Sken case CTL_BE_BLOCK_FILE: 2061229997Sken break; 2062229997Sken case CTL_BE_BLOCK_NONE: 2063258871Strasz break; 2064229997Sken default: 2065229997Sken panic("Unexpected backend type."); 2066229997Sken break; 2067229997Sken } 2068229997Sken 2069229997Sken (void)vn_close(be_lun->vn, flags, NOCRED, curthread); 2070229997Sken be_lun->vn = NULL; 2071229997Sken 2072229997Sken switch (be_lun->dev_type) { 2073229997Sken case CTL_BE_BLOCK_DEV: 2074229997Sken break; 2075229997Sken case CTL_BE_BLOCK_FILE: 2076229997Sken if (be_lun->backend.file.cred != NULL) { 2077229997Sken crfree(be_lun->backend.file.cred); 2078229997Sken be_lun->backend.file.cred = NULL; 2079229997Sken } 2080229997Sken break; 2081229997Sken case CTL_BE_BLOCK_NONE: 2082258871Strasz break; 2083229997Sken default: 2084229997Sken panic("Unexpected backend type."); 2085229997Sken break; 2086229997Sken } 2087272911Smav be_lun->dev_type = CTL_BE_BLOCK_NONE; 2088229997Sken } 2089229997Sken PICKUP_GIANT(); 2090229997Sken 2091229997Sken return (0); 2092229997Sken} 2093229997Sken 2094229997Skenstatic int 2095229997Skenctl_be_block_open(struct ctl_be_block_softc *softc, 2096229997Sken struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req) 2097229997Sken{ 2098229997Sken struct nameidata nd; 2099229997Sken int flags; 2100229997Sken int error; 2101229997Sken 2102229997Sken /* 2103229997Sken * XXX KDM allow a read-only option? 2104229997Sken */ 2105229997Sken flags = FREAD | FWRITE; 2106229997Sken error = 0; 2107229997Sken 2108229997Sken if (rootvnode == NULL) { 2109229997Sken snprintf(req->error_str, sizeof(req->error_str), 2110272911Smav "Root filesystem is not mounted"); 2111229997Sken return (1); 2112229997Sken } 2113229997Sken 2114285391Smjg pwd_ensure_dirs(); 2115229997Sken 2116229997Sken again: 2117229997Sken NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, be_lun->dev_path, curthread); 2118229997Sken error = vn_open(&nd, &flags, 0, NULL); 2119229997Sken if (error) { 2120229997Sken /* 2121229997Sken * This is the only reasonable guess we can make as far as 2122229997Sken * path if the user doesn't give us a fully qualified path. 2123229997Sken * If they want to specify a file, they need to specify the 2124229997Sken * full path. 2125229997Sken */ 2126229997Sken if (be_lun->dev_path[0] != '/') { 2127229997Sken char *dev_path = "/dev/"; 2128229997Sken char *dev_name; 2129229997Sken 2130229997Sken /* Try adding device path at beginning of name */ 2131229997Sken dev_name = malloc(strlen(be_lun->dev_path) 2132229997Sken + strlen(dev_path) + 1, 2133229997Sken M_CTLBLK, M_WAITOK); 2134229997Sken if (dev_name) { 2135229997Sken sprintf(dev_name, "%s%s", dev_path, 2136229997Sken be_lun->dev_path); 2137229997Sken free(be_lun->dev_path, M_CTLBLK); 2138229997Sken be_lun->dev_path = dev_name; 2139229997Sken goto again; 2140229997Sken } 2141229997Sken } 2142229997Sken snprintf(req->error_str, sizeof(req->error_str), 2143272911Smav "error opening %s: %d", be_lun->dev_path, error); 2144229997Sken return (error); 2145229997Sken } 2146229997Sken 2147229997Sken NDFREE(&nd, NDF_ONLY_PNBUF); 2148229997Sken 2149229997Sken be_lun->vn = nd.ni_vp; 2150229997Sken 2151229997Sken /* We only support disks and files. */ 2152229997Sken if (vn_isdisk(be_lun->vn, &error)) { 2153229997Sken error = ctl_be_block_open_dev(be_lun, req); 2154229997Sken } else if (be_lun->vn->v_type == VREG) { 2155229997Sken error = ctl_be_block_open_file(be_lun, req); 2156229997Sken } else { 2157229997Sken error = EINVAL; 2158229997Sken snprintf(req->error_str, sizeof(req->error_str), 2159258871Strasz "%s is not a disk or plain file", be_lun->dev_path); 2160229997Sken } 2161229997Sken VOP_UNLOCK(be_lun->vn, 0); 2162229997Sken 2163229997Sken if (error != 0) { 2164229997Sken ctl_be_block_close(be_lun); 2165229997Sken return (error); 2166229997Sken } 2167229997Sken 2168229997Sken be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2169229997Sken be_lun->size_blocks = be_lun->size_bytes >> be_lun->blocksize_shift; 2170229997Sken 2171229997Sken return (0); 2172229997Sken} 2173229997Sken 2174229997Skenstatic int 2175229997Skenctl_be_block_create(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2176229997Sken{ 2177229997Sken struct ctl_be_block_lun *be_lun; 2178229997Sken struct ctl_lun_create_params *params; 2179267481Smav char num_thread_str[16]; 2180229997Sken char tmpstr[32]; 2181267481Smav char *value; 2182278672Smav int retval, num_threads; 2183267481Smav int tmp_num_threads; 2184229997Sken 2185229997Sken params = &req->reqdata.create; 2186229997Sken retval = 0; 2187272911Smav req->status = CTL_LUN_OK; 2188229997Sken 2189229997Sken num_threads = cbb_num_threads; 2190229997Sken 2191229997Sken be_lun = malloc(sizeof(*be_lun), M_CTLBLK, M_ZERO | M_WAITOK); 2192229997Sken 2193272911Smav be_lun->params = req->reqdata.create; 2194229997Sken be_lun->softc = softc; 2195229997Sken STAILQ_INIT(&be_lun->input_queue); 2196275474Smav STAILQ_INIT(&be_lun->config_read_queue); 2197229997Sken STAILQ_INIT(&be_lun->config_write_queue); 2198229997Sken STAILQ_INIT(&be_lun->datamove_queue); 2199229997Sken sprintf(be_lun->lunname, "cblk%d", softc->num_luns); 2200267877Smav mtx_init(&be_lun->io_lock, "cblk io lock", NULL, MTX_DEF); 2201267877Smav mtx_init(&be_lun->queue_lock, "cblk queue lock", NULL, MTX_DEF); 2202268280Smav ctl_init_opts(&be_lun->ctl_be_lun.options, 2203268280Smav req->num_be_args, req->kern_be_args); 2204229997Sken 2205264886Smav be_lun->lun_zone = uma_zcreate(be_lun->lunname, CTLBLK_MAX_SEG, 2206256995Smav NULL, NULL, NULL, NULL, /*align*/ 0, /*flags*/0); 2207229997Sken 2208229997Sken if (be_lun->lun_zone == NULL) { 2209229997Sken snprintf(req->error_str, sizeof(req->error_str), 2210272911Smav "error allocating UMA zone"); 2211229997Sken goto bailout_error; 2212229997Sken } 2213229997Sken 2214229997Sken if (params->flags & CTL_LUN_FLAG_DEV_TYPE) 2215229997Sken be_lun->ctl_be_lun.lun_type = params->device_type; 2216229997Sken else 2217229997Sken be_lun->ctl_be_lun.lun_type = T_DIRECT; 2218229997Sken 2219229997Sken if (be_lun->ctl_be_lun.lun_type == T_DIRECT) { 2220268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "file"); 2221267499Smav if (value == NULL) { 2222229997Sken snprintf(req->error_str, sizeof(req->error_str), 2223272911Smav "no file argument specified"); 2224229997Sken goto bailout_error; 2225229997Sken } 2226267499Smav be_lun->dev_path = strdup(value, M_CTLBLK); 2227272911Smav be_lun->blocksize = 512; 2228272911Smav be_lun->blocksize_shift = fls(be_lun->blocksize) - 1; 2229229997Sken 2230229997Sken retval = ctl_be_block_open(softc, be_lun, req); 2231229997Sken if (retval != 0) { 2232229997Sken retval = 0; 2233272911Smav req->status = CTL_LUN_WARNING; 2234229997Sken } 2235229997Sken } else { 2236229997Sken /* 2237229997Sken * For processor devices, we don't have any size. 2238229997Sken */ 2239229997Sken be_lun->blocksize = 0; 2240264191Smav be_lun->pblockexp = 0; 2241264191Smav be_lun->pblockoff = 0; 2242275865Smav be_lun->ublockexp = 0; 2243275865Smav be_lun->ublockoff = 0; 2244229997Sken be_lun->size_blocks = 0; 2245229997Sken be_lun->size_bytes = 0; 2246229997Sken be_lun->ctl_be_lun.maxlba = 0; 2247229997Sken 2248229997Sken /* 2249229997Sken * Default to just 1 thread for processor devices. 2250229997Sken */ 2251229997Sken num_threads = 1; 2252229997Sken } 2253229997Sken 2254229997Sken /* 2255229997Sken * XXX This searching loop might be refactored to be combined with 2256229997Sken * the loop above, 2257229997Sken */ 2258268280Smav value = ctl_get_opt(&be_lun->ctl_be_lun.options, "num_threads"); 2259267481Smav if (value != NULL) { 2260267481Smav tmp_num_threads = strtol(value, NULL, 0); 2261229997Sken 2262267481Smav /* 2263267481Smav * We don't let the user specify less than one 2264267481Smav * thread, but hope he's clueful enough not to 2265267481Smav * specify 1000 threads. 2266267481Smav */ 2267267481Smav if (tmp_num_threads < 1) { 2268267481Smav snprintf(req->error_str, sizeof(req->error_str), 2269272911Smav "invalid number of threads %s", 2270272911Smav num_thread_str); 2271267481Smav goto bailout_error; 2272229997Sken } 2273267481Smav num_threads = tmp_num_threads; 2274229997Sken } 2275229997Sken 2276229997Sken be_lun->flags = CTL_BE_BLOCK_LUN_UNCONFIGURED; 2277229997Sken be_lun->ctl_be_lun.flags = CTL_LUN_FLAG_PRIMARY; 2278272911Smav if (be_lun->vn == NULL) 2279272911Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_OFFLINE; 2280278672Smav if (be_lun->unmap != NULL) 2281264274Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 2282275568Smav if (be_lun->dispatch != ctl_be_block_dispatch_dev) 2283275568Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_SERSEQ_READ; 2284229997Sken be_lun->ctl_be_lun.be_lun = be_lun; 2285272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2286272911Smav 0 : (be_lun->size_blocks - 1); 2287229997Sken be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2288264191Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2289264191Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2290275865Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2291275865Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2292275920Smav be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock; 2293275920Smav be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen; 2294229997Sken /* Tell the user the blocksize we ended up using */ 2295272911Smav params->lun_size_bytes = be_lun->size_bytes; 2296229997Sken params->blocksize_bytes = be_lun->blocksize; 2297229997Sken if (params->flags & CTL_LUN_FLAG_ID_REQ) { 2298229997Sken be_lun->ctl_be_lun.req_lun_id = params->req_lun_id; 2299229997Sken be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ; 2300229997Sken } else 2301229997Sken be_lun->ctl_be_lun.req_lun_id = 0; 2302229997Sken 2303229997Sken be_lun->ctl_be_lun.lun_shutdown = ctl_be_block_lun_shutdown; 2304229997Sken be_lun->ctl_be_lun.lun_config_status = 2305229997Sken ctl_be_block_lun_config_status; 2306229997Sken be_lun->ctl_be_lun.be = &ctl_be_block_driver; 2307229997Sken 2308229997Sken if ((params->flags & CTL_LUN_FLAG_SERIAL_NUM) == 0) { 2309229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYSERIAL%4d", 2310229997Sken softc->num_luns); 2311229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, tmpstr, 2312275953Smav MIN(sizeof(be_lun->ctl_be_lun.serial_num), 2313229997Sken sizeof(tmpstr))); 2314229997Sken 2315229997Sken /* Tell the user what we used for a serial number */ 2316229997Sken strncpy((char *)params->serial_num, tmpstr, 2317275953Smav MIN(sizeof(params->serial_num), sizeof(tmpstr))); 2318229997Sken } else { 2319229997Sken strncpy((char *)be_lun->ctl_be_lun.serial_num, 2320229997Sken params->serial_num, 2321275953Smav MIN(sizeof(be_lun->ctl_be_lun.serial_num), 2322229997Sken sizeof(params->serial_num))); 2323229997Sken } 2324229997Sken if ((params->flags & CTL_LUN_FLAG_DEVID) == 0) { 2325229997Sken snprintf(tmpstr, sizeof(tmpstr), "MYDEVID%4d", softc->num_luns); 2326229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, tmpstr, 2327275953Smav MIN(sizeof(be_lun->ctl_be_lun.device_id), 2328229997Sken sizeof(tmpstr))); 2329229997Sken 2330229997Sken /* Tell the user what we used for a device ID */ 2331229997Sken strncpy((char *)params->device_id, tmpstr, 2332275953Smav MIN(sizeof(params->device_id), sizeof(tmpstr))); 2333229997Sken } else { 2334229997Sken strncpy((char *)be_lun->ctl_be_lun.device_id, 2335229997Sken params->device_id, 2336275953Smav MIN(sizeof(be_lun->ctl_be_lun.device_id), 2337275953Smav sizeof(params->device_id))); 2338229997Sken } 2339229997Sken 2340229997Sken TASK_INIT(&be_lun->io_task, /*priority*/0, ctl_be_block_worker, be_lun); 2341229997Sken 2342229997Sken be_lun->io_taskqueue = taskqueue_create(be_lun->lunname, M_WAITOK, 2343229997Sken taskqueue_thread_enqueue, /*context*/&be_lun->io_taskqueue); 2344229997Sken 2345229997Sken if (be_lun->io_taskqueue == NULL) { 2346229997Sken snprintf(req->error_str, sizeof(req->error_str), 2347272911Smav "unable to create taskqueue"); 2348229997Sken goto bailout_error; 2349229997Sken } 2350229997Sken 2351229997Sken /* 2352229997Sken * Note that we start the same number of threads by default for 2353229997Sken * both the file case and the block device case. For the file 2354229997Sken * case, we need multiple threads to allow concurrency, because the 2355229997Sken * vnode interface is designed to be a blocking interface. For the 2356229997Sken * block device case, ZFS zvols at least will block the caller's 2357229997Sken * context in many instances, and so we need multiple threads to 2358229997Sken * overcome that problem. Other block devices don't need as many 2359229997Sken * threads, but they shouldn't cause too many problems. 2360229997Sken * 2361229997Sken * If the user wants to just have a single thread for a block 2362229997Sken * device, he can specify that when the LUN is created, or change 2363229997Sken * the tunable/sysctl to alter the default number of threads. 2364229997Sken */ 2365229997Sken retval = taskqueue_start_threads(&be_lun->io_taskqueue, 2366229997Sken /*num threads*/num_threads, 2367229997Sken /*priority*/PWAIT, 2368229997Sken /*thread name*/ 2369229997Sken "%s taskq", be_lun->lunname); 2370229997Sken 2371229997Sken if (retval != 0) 2372229997Sken goto bailout_error; 2373229997Sken 2374229997Sken be_lun->num_threads = num_threads; 2375229997Sken 2376229997Sken mtx_lock(&softc->lock); 2377229997Sken softc->num_luns++; 2378229997Sken STAILQ_INSERT_TAIL(&softc->lun_list, be_lun, links); 2379229997Sken 2380229997Sken mtx_unlock(&softc->lock); 2381229997Sken 2382229997Sken retval = ctl_add_lun(&be_lun->ctl_be_lun); 2383229997Sken if (retval != 0) { 2384229997Sken mtx_lock(&softc->lock); 2385229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2386229997Sken links); 2387229997Sken softc->num_luns--; 2388229997Sken mtx_unlock(&softc->lock); 2389229997Sken snprintf(req->error_str, sizeof(req->error_str), 2390272911Smav "ctl_add_lun() returned error %d, see dmesg for " 2391272911Smav "details", retval); 2392229997Sken retval = 0; 2393229997Sken goto bailout_error; 2394229997Sken } 2395229997Sken 2396229997Sken mtx_lock(&softc->lock); 2397229997Sken 2398229997Sken /* 2399229997Sken * Tell the config_status routine that we're waiting so it won't 2400229997Sken * clean up the LUN in the event of an error. 2401229997Sken */ 2402229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2403229997Sken 2404229997Sken while (be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) { 2405229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2406229997Sken if (retval == EINTR) 2407229997Sken break; 2408229997Sken } 2409229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2410229997Sken 2411229997Sken if (be_lun->flags & CTL_BE_BLOCK_LUN_CONFIG_ERR) { 2412229997Sken snprintf(req->error_str, sizeof(req->error_str), 2413272911Smav "LUN configuration error, see dmesg for details"); 2414229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, 2415229997Sken links); 2416229997Sken softc->num_luns--; 2417229997Sken mtx_unlock(&softc->lock); 2418229997Sken goto bailout_error; 2419229997Sken } else { 2420229997Sken params->req_lun_id = be_lun->ctl_be_lun.lun_id; 2421229997Sken } 2422229997Sken 2423229997Sken mtx_unlock(&softc->lock); 2424229997Sken 2425229997Sken be_lun->disk_stats = devstat_new_entry("cbb", params->req_lun_id, 2426229997Sken be_lun->blocksize, 2427229997Sken DEVSTAT_ALL_SUPPORTED, 2428229997Sken be_lun->ctl_be_lun.lun_type 2429229997Sken | DEVSTAT_TYPE_IF_OTHER, 2430229997Sken DEVSTAT_PRIORITY_OTHER); 2431229997Sken 2432229997Sken return (retval); 2433229997Sken 2434229997Skenbailout_error: 2435229997Sken req->status = CTL_LUN_ERROR; 2436229997Sken 2437267429Smav if (be_lun->io_taskqueue != NULL) 2438267429Smav taskqueue_free(be_lun->io_taskqueue); 2439229997Sken ctl_be_block_close(be_lun); 2440267429Smav if (be_lun->dev_path != NULL) 2441267429Smav free(be_lun->dev_path, M_CTLBLK); 2442267429Smav if (be_lun->lun_zone != NULL) 2443267429Smav uma_zdestroy(be_lun->lun_zone); 2444268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2445267877Smav mtx_destroy(&be_lun->queue_lock); 2446267877Smav mtx_destroy(&be_lun->io_lock); 2447229997Sken free(be_lun, M_CTLBLK); 2448229997Sken 2449229997Sken return (retval); 2450229997Sken} 2451229997Sken 2452229997Skenstatic int 2453229997Skenctl_be_block_rm(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2454229997Sken{ 2455229997Sken struct ctl_lun_rm_params *params; 2456229997Sken struct ctl_be_block_lun *be_lun; 2457229997Sken int retval; 2458229997Sken 2459229997Sken params = &req->reqdata.rm; 2460229997Sken 2461229997Sken mtx_lock(&softc->lock); 2462229997Sken 2463229997Sken be_lun = NULL; 2464229997Sken 2465229997Sken STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2466229997Sken if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2467229997Sken break; 2468229997Sken } 2469229997Sken mtx_unlock(&softc->lock); 2470229997Sken 2471229997Sken if (be_lun == NULL) { 2472229997Sken snprintf(req->error_str, sizeof(req->error_str), 2473272911Smav "LUN %u is not managed by the block backend", 2474272911Smav params->lun_id); 2475229997Sken goto bailout_error; 2476229997Sken } 2477229997Sken 2478229997Sken retval = ctl_disable_lun(&be_lun->ctl_be_lun); 2479229997Sken 2480229997Sken if (retval != 0) { 2481229997Sken snprintf(req->error_str, sizeof(req->error_str), 2482272911Smav "error %d returned from ctl_disable_lun() for " 2483272911Smav "LUN %d", retval, params->lun_id); 2484229997Sken goto bailout_error; 2485229997Sken 2486229997Sken } 2487229997Sken 2488229997Sken retval = ctl_invalidate_lun(&be_lun->ctl_be_lun); 2489229997Sken if (retval != 0) { 2490229997Sken snprintf(req->error_str, sizeof(req->error_str), 2491272911Smav "error %d returned from ctl_invalidate_lun() for " 2492272911Smav "LUN %d", retval, params->lun_id); 2493229997Sken goto bailout_error; 2494229997Sken } 2495229997Sken 2496229997Sken mtx_lock(&softc->lock); 2497229997Sken 2498229997Sken be_lun->flags |= CTL_BE_BLOCK_LUN_WAITING; 2499229997Sken 2500229997Sken while ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2501229997Sken retval = msleep(be_lun, &softc->lock, PCATCH, "ctlblk", 0); 2502229997Sken if (retval == EINTR) 2503229997Sken break; 2504229997Sken } 2505229997Sken 2506229997Sken be_lun->flags &= ~CTL_BE_BLOCK_LUN_WAITING; 2507229997Sken 2508229997Sken if ((be_lun->flags & CTL_BE_BLOCK_LUN_UNCONFIGURED) == 0) { 2509229997Sken snprintf(req->error_str, sizeof(req->error_str), 2510272911Smav "interrupted waiting for LUN to be freed"); 2511229997Sken mtx_unlock(&softc->lock); 2512229997Sken goto bailout_error; 2513229997Sken } 2514229997Sken 2515229997Sken STAILQ_REMOVE(&softc->lun_list, be_lun, ctl_be_block_lun, links); 2516229997Sken 2517229997Sken softc->num_luns--; 2518229997Sken mtx_unlock(&softc->lock); 2519229997Sken 2520229997Sken taskqueue_drain(be_lun->io_taskqueue, &be_lun->io_task); 2521229997Sken 2522229997Sken taskqueue_free(be_lun->io_taskqueue); 2523229997Sken 2524229997Sken ctl_be_block_close(be_lun); 2525229997Sken 2526229997Sken if (be_lun->disk_stats != NULL) 2527229997Sken devstat_remove_entry(be_lun->disk_stats); 2528229997Sken 2529229997Sken uma_zdestroy(be_lun->lun_zone); 2530229997Sken 2531268280Smav ctl_free_opts(&be_lun->ctl_be_lun.options); 2532229997Sken free(be_lun->dev_path, M_CTLBLK); 2533267877Smav mtx_destroy(&be_lun->queue_lock); 2534267877Smav mtx_destroy(&be_lun->io_lock); 2535229997Sken free(be_lun, M_CTLBLK); 2536229997Sken 2537229997Sken req->status = CTL_LUN_OK; 2538229997Sken 2539229997Sken return (0); 2540229997Sken 2541229997Skenbailout_error: 2542229997Sken 2543229997Sken req->status = CTL_LUN_ERROR; 2544229997Sken 2545229997Sken return (0); 2546229997Sken} 2547229997Sken 2548232604Straszstatic int 2549232604Straszctl_be_block_modify_file(struct ctl_be_block_lun *be_lun, 2550232604Strasz struct ctl_lun_req *req) 2551232604Strasz{ 2552232604Strasz struct vattr vattr; 2553232604Strasz int error; 2554272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2555232604Strasz 2556232604Strasz if (params->lun_size_bytes != 0) { 2557232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2558232604Strasz } else { 2559271794Smav vn_lock(be_lun->vn, LK_SHARED | LK_RETRY); 2560232604Strasz error = VOP_GETATTR(be_lun->vn, &vattr, curthread->td_ucred); 2561271794Smav VOP_UNLOCK(be_lun->vn, 0); 2562232604Strasz if (error != 0) { 2563232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2564232604Strasz "error calling VOP_GETATTR() for file %s", 2565232604Strasz be_lun->dev_path); 2566232604Strasz return (error); 2567232604Strasz } 2568232604Strasz 2569232604Strasz be_lun->size_bytes = vattr.va_size; 2570232604Strasz } 2571232604Strasz 2572232604Strasz return (0); 2573232604Strasz} 2574232604Strasz 2575232604Straszstatic int 2576232604Straszctl_be_block_modify_dev(struct ctl_be_block_lun *be_lun, 2577232604Strasz struct ctl_lun_req *req) 2578232604Strasz{ 2579271794Smav struct ctl_be_block_devdata *dev_data; 2580232604Strasz int error; 2581272911Smav struct ctl_lun_create_params *params = &be_lun->params; 2582232604Strasz uint64_t size_bytes; 2583232604Strasz 2584271794Smav dev_data = &be_lun->backend.dev; 2585271794Smav if (!dev_data->csw->d_ioctl) { 2586232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2587272911Smav "no d_ioctl for device %s!", be_lun->dev_path); 2588232604Strasz return (ENODEV); 2589232604Strasz } 2590232604Strasz 2591271794Smav error = dev_data->csw->d_ioctl(dev_data->cdev, DIOCGMEDIASIZE, 2592232604Strasz (caddr_t)&size_bytes, FREAD, 2593232604Strasz curthread); 2594232604Strasz if (error) { 2595232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2596272911Smav "error %d returned for DIOCGMEDIASIZE ioctl " 2597272911Smav "on %s!", error, be_lun->dev_path); 2598232604Strasz return (error); 2599232604Strasz } 2600232604Strasz 2601232604Strasz if (params->lun_size_bytes != 0) { 2602232604Strasz if (params->lun_size_bytes > size_bytes) { 2603232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2604272911Smav "requested LUN size %ju > backing device " 2605272911Smav "size %ju", 2606232604Strasz (uintmax_t)params->lun_size_bytes, 2607232604Strasz (uintmax_t)size_bytes); 2608232604Strasz return (EINVAL); 2609232604Strasz } 2610232604Strasz 2611232604Strasz be_lun->size_bytes = params->lun_size_bytes; 2612232604Strasz } else { 2613232604Strasz be_lun->size_bytes = size_bytes; 2614232604Strasz } 2615232604Strasz 2616232604Strasz return (0); 2617232604Strasz} 2618232604Strasz 2619232604Straszstatic int 2620232604Straszctl_be_block_modify(struct ctl_be_block_softc *softc, struct ctl_lun_req *req) 2621232604Strasz{ 2622232604Strasz struct ctl_lun_modify_params *params; 2623232604Strasz struct ctl_be_block_lun *be_lun; 2624271794Smav uint64_t oldsize; 2625241896Skib int error; 2626232604Strasz 2627232604Strasz params = &req->reqdata.modify; 2628232604Strasz 2629232604Strasz mtx_lock(&softc->lock); 2630232604Strasz be_lun = NULL; 2631232604Strasz STAILQ_FOREACH(be_lun, &softc->lun_list, links) { 2632232604Strasz if (be_lun->ctl_be_lun.lun_id == params->lun_id) 2633232604Strasz break; 2634232604Strasz } 2635232604Strasz mtx_unlock(&softc->lock); 2636232604Strasz 2637232604Strasz if (be_lun == NULL) { 2638232604Strasz snprintf(req->error_str, sizeof(req->error_str), 2639272911Smav "LUN %u is not managed by the block backend", 2640272911Smav params->lun_id); 2641232604Strasz goto bailout_error; 2642232604Strasz } 2643232604Strasz 2644272911Smav be_lun->params.lun_size_bytes = params->lun_size_bytes; 2645232604Strasz 2646274253Smav oldsize = be_lun->size_bytes; 2647272911Smav if (be_lun->vn == NULL) 2648272911Smav error = ctl_be_block_open(softc, be_lun, req); 2649285030Smav else if (vn_isdisk(be_lun->vn, &error)) 2650285030Smav error = ctl_be_block_modify_dev(be_lun, req); 2651272911Smav else if (be_lun->vn->v_type == VREG) 2652232604Strasz error = ctl_be_block_modify_file(be_lun, req); 2653232604Strasz else 2654285030Smav error = EINVAL; 2655232604Strasz 2656274253Smav if (error == 0 && be_lun->size_bytes != oldsize) { 2657271794Smav be_lun->size_blocks = be_lun->size_bytes >> 2658271794Smav be_lun->blocksize_shift; 2659232604Strasz 2660271794Smav /* 2661271794Smav * The maximum LBA is the size - 1. 2662271794Smav * 2663271794Smav * XXX: Note that this field is being updated without locking, 2664271794Smav * which might cause problems on 32-bit architectures. 2665271794Smav */ 2666278672Smav if (be_lun->unmap != NULL) 2667278672Smav be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_UNMAP; 2668272911Smav be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ? 2669272911Smav 0 : (be_lun->size_blocks - 1); 2670272911Smav be_lun->ctl_be_lun.blocksize = be_lun->blocksize; 2671272911Smav be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp; 2672272911Smav be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff; 2673275865Smav be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp; 2674275865Smav be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff; 2675275920Smav be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock; 2676275920Smav be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen; 2677271794Smav ctl_lun_capacity_changed(&be_lun->ctl_be_lun); 2678272911Smav if (oldsize == 0 && be_lun->size_blocks != 0) 2679272911Smav ctl_lun_online(&be_lun->ctl_be_lun); 2680271794Smav } 2681232604Strasz 2682232604Strasz /* Tell the user the exact size we ended up using */ 2683232604Strasz params->lun_size_bytes = be_lun->size_bytes; 2684232604Strasz 2685272911Smav req->status = error ? CTL_LUN_WARNING : CTL_LUN_OK; 2686232604Strasz 2687232604Strasz return (0); 2688232604Strasz 2689232604Straszbailout_error: 2690232604Strasz req->status = CTL_LUN_ERROR; 2691232604Strasz 2692232604Strasz return (0); 2693232604Strasz} 2694232604Strasz 2695229997Skenstatic void 2696229997Skenctl_be_block_lun_shutdown(void *be_lun) 2697229997Sken{ 2698229997Sken struct ctl_be_block_lun *lun; 2699229997Sken struct ctl_be_block_softc *softc; 2700229997Sken 2701229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2702229997Sken 2703229997Sken softc = lun->softc; 2704229997Sken 2705229997Sken mtx_lock(&softc->lock); 2706229997Sken lun->flags |= CTL_BE_BLOCK_LUN_UNCONFIGURED; 2707229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2708229997Sken wakeup(lun); 2709229997Sken mtx_unlock(&softc->lock); 2710229997Sken 2711229997Sken} 2712229997Sken 2713229997Skenstatic void 2714229997Skenctl_be_block_lun_config_status(void *be_lun, ctl_lun_config_status status) 2715229997Sken{ 2716229997Sken struct ctl_be_block_lun *lun; 2717229997Sken struct ctl_be_block_softc *softc; 2718229997Sken 2719229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2720229997Sken softc = lun->softc; 2721229997Sken 2722229997Sken if (status == CTL_LUN_CONFIG_OK) { 2723229997Sken mtx_lock(&softc->lock); 2724229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2725229997Sken if (lun->flags & CTL_BE_BLOCK_LUN_WAITING) 2726229997Sken wakeup(lun); 2727229997Sken mtx_unlock(&softc->lock); 2728229997Sken 2729229997Sken /* 2730229997Sken * We successfully added the LUN, attempt to enable it. 2731229997Sken */ 2732229997Sken if (ctl_enable_lun(&lun->ctl_be_lun) != 0) { 2733229997Sken printf("%s: ctl_enable_lun() failed!\n", __func__); 2734229997Sken if (ctl_invalidate_lun(&lun->ctl_be_lun) != 0) { 2735229997Sken printf("%s: ctl_invalidate_lun() failed!\n", 2736229997Sken __func__); 2737229997Sken } 2738229997Sken } 2739229997Sken 2740229997Sken return; 2741229997Sken } 2742229997Sken 2743229997Sken 2744229997Sken mtx_lock(&softc->lock); 2745229997Sken lun->flags &= ~CTL_BE_BLOCK_LUN_UNCONFIGURED; 2746229997Sken lun->flags |= CTL_BE_BLOCK_LUN_CONFIG_ERR; 2747229997Sken wakeup(lun); 2748229997Sken mtx_unlock(&softc->lock); 2749229997Sken} 2750229997Sken 2751229997Sken 2752229997Skenstatic int 2753229997Skenctl_be_block_config_write(union ctl_io *io) 2754229997Sken{ 2755229997Sken struct ctl_be_block_lun *be_lun; 2756229997Sken struct ctl_be_lun *ctl_be_lun; 2757229997Sken int retval; 2758229997Sken 2759229997Sken retval = 0; 2760229997Sken 2761229997Sken DPRINTF("entered\n"); 2762229997Sken 2763229997Sken ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2764229997Sken CTL_PRIV_BACKEND_LUN].ptr; 2765229997Sken be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2766229997Sken 2767229997Sken switch (io->scsiio.cdb[0]) { 2768229997Sken case SYNCHRONIZE_CACHE: 2769229997Sken case SYNCHRONIZE_CACHE_16: 2770264274Smav case WRITE_SAME_10: 2771264274Smav case WRITE_SAME_16: 2772264274Smav case UNMAP: 2773229997Sken /* 2774229997Sken * The upper level CTL code will filter out any CDBs with 2775229997Sken * the immediate bit set and return the proper error. 2776229997Sken * 2777229997Sken * We don't really need to worry about what LBA range the 2778229997Sken * user asked to be synced out. When they issue a sync 2779229997Sken * cache command, we'll sync out the whole thing. 2780229997Sken */ 2781267877Smav mtx_lock(&be_lun->queue_lock); 2782229997Sken STAILQ_INSERT_TAIL(&be_lun->config_write_queue, &io->io_hdr, 2783229997Sken links); 2784267877Smav mtx_unlock(&be_lun->queue_lock); 2785229997Sken taskqueue_enqueue(be_lun->io_taskqueue, &be_lun->io_task); 2786229997Sken break; 2787229997Sken case START_STOP_UNIT: { 2788229997Sken struct scsi_start_stop_unit *cdb; 2789229997Sken 2790229997Sken cdb = (struct scsi_start_stop_unit *)io->scsiio.cdb; 2791229997Sken 2792229997Sken if (cdb->how & SSS_START) 2793229997Sken retval = ctl_start_lun(ctl_be_lun); 2794229997Sken else { 2795229997Sken retval = ctl_stop_lun(ctl_be_lun); 2796229997Sken /* 2797229997Sken * XXX KDM Copan-specific offline behavior. 2798229997Sken * Figure out a reasonable way to port this? 2799229997Sken */ 2800229997Sken#ifdef NEEDTOPORT 2801229997Sken if ((retval == 0) 2802229997Sken && (cdb->byte2 & SSS_ONOFFLINE)) 2803229997Sken retval = ctl_lun_offline(ctl_be_lun); 2804229997Sken#endif 2805229997Sken } 2806229997Sken 2807229997Sken /* 2808229997Sken * In general, the above routines should not fail. They 2809229997Sken * just set state for the LUN. So we've got something 2810229997Sken * pretty wrong here if we can't start or stop the LUN. 2811229997Sken */ 2812229997Sken if (retval != 0) { 2813229997Sken ctl_set_internal_failure(&io->scsiio, 2814229997Sken /*sks_valid*/ 1, 2815229997Sken /*retry_count*/ 0xf051); 2816229997Sken retval = CTL_RETVAL_COMPLETE; 2817229997Sken } else { 2818229997Sken ctl_set_success(&io->scsiio); 2819229997Sken } 2820229997Sken ctl_config_write_done(io); 2821229997Sken break; 2822229997Sken } 2823229997Sken default: 2824229997Sken ctl_set_invalid_opcode(&io->scsiio); 2825229997Sken ctl_config_write_done(io); 2826229997Sken retval = CTL_RETVAL_COMPLETE; 2827229997Sken break; 2828229997Sken } 2829229997Sken 2830229997Sken return (retval); 2831229997Sken} 2832229997Sken 2833229997Skenstatic int 2834229997Skenctl_be_block_config_read(union ctl_io *io) 2835229997Sken{ 2836275474Smav struct ctl_be_block_lun *be_lun; 2837275474Smav struct ctl_be_lun *ctl_be_lun; 2838275474Smav int retval = 0; 2839275474Smav 2840275474Smav DPRINTF("entered\n"); 2841275474Smav 2842275474Smav ctl_be_lun = (struct ctl_be_lun *)io->io_hdr.ctl_private[ 2843275474Smav CTL_PRIV_BACKEND_LUN].ptr; 2844275474Smav be_lun = (struct ctl_be_block_lun *)ctl_be_lun->be_lun; 2845275474Smav 2846275474Smav switch (io->scsiio.cdb[0]) { 2847275474Smav case SERVICE_ACTION_IN: 2848275474Smav if (io->scsiio.cdb[1] == SGLS_SERVICE_ACTION) { 2849275474Smav mtx_lock(&be_lun->queue_lock); 2850275474Smav STAILQ_INSERT_TAIL(&be_lun->config_read_queue, 2851275474Smav &io->io_hdr, links); 2852275474Smav mtx_unlock(&be_lun->queue_lock); 2853275474Smav taskqueue_enqueue(be_lun->io_taskqueue, 2854275474Smav &be_lun->io_task); 2855275474Smav retval = CTL_RETVAL_QUEUED; 2856275474Smav break; 2857275474Smav } 2858275474Smav ctl_set_invalid_field(&io->scsiio, 2859275474Smav /*sks_valid*/ 1, 2860275474Smav /*command*/ 1, 2861275474Smav /*field*/ 1, 2862275474Smav /*bit_valid*/ 1, 2863275474Smav /*bit*/ 4); 2864275474Smav ctl_config_read_done(io); 2865275474Smav retval = CTL_RETVAL_COMPLETE; 2866275474Smav break; 2867275474Smav default: 2868275474Smav ctl_set_invalid_opcode(&io->scsiio); 2869275474Smav ctl_config_read_done(io); 2870275474Smav retval = CTL_RETVAL_COMPLETE; 2871275474Smav break; 2872275474Smav } 2873275474Smav 2874275474Smav return (retval); 2875229997Sken} 2876229997Sken 2877229997Skenstatic int 2878229997Skenctl_be_block_lun_info(void *be_lun, struct sbuf *sb) 2879229997Sken{ 2880229997Sken struct ctl_be_block_lun *lun; 2881229997Sken int retval; 2882229997Sken 2883229997Sken lun = (struct ctl_be_block_lun *)be_lun; 2884229997Sken retval = 0; 2885229997Sken 2886268283Smav retval = sbuf_printf(sb, "\t<num_threads>"); 2887229997Sken 2888229997Sken if (retval != 0) 2889229997Sken goto bailout; 2890229997Sken 2891229997Sken retval = sbuf_printf(sb, "%d", lun->num_threads); 2892229997Sken 2893229997Sken if (retval != 0) 2894229997Sken goto bailout; 2895229997Sken 2896268283Smav retval = sbuf_printf(sb, "</num_threads>\n"); 2897229997Sken 2898229997Skenbailout: 2899229997Sken 2900229997Sken return (retval); 2901229997Sken} 2902229997Sken 2903274154Smavstatic uint64_t 2904274154Smavctl_be_block_lun_attr(void *be_lun, const char *attrname) 2905274154Smav{ 2906274154Smav struct ctl_be_block_lun *lun = (struct ctl_be_block_lun *)be_lun; 2907274154Smav 2908274154Smav if (lun->getattr == NULL) 2909274154Smav return (UINT64_MAX); 2910274154Smav return (lun->getattr(lun, attrname)); 2911274154Smav} 2912274154Smav 2913229997Skenint 2914229997Skenctl_be_block_init(void) 2915229997Sken{ 2916229997Sken struct ctl_be_block_softc *softc; 2917229997Sken int retval; 2918229997Sken 2919229997Sken softc = &backend_block_softc; 2920229997Sken retval = 0; 2921229997Sken 2922267877Smav mtx_init(&softc->lock, "ctlblock", NULL, MTX_DEF); 2923264020Strasz beio_zone = uma_zcreate("beio", sizeof(struct ctl_be_block_io), 2924264020Strasz NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 2925229997Sken STAILQ_INIT(&softc->disk_list); 2926229997Sken STAILQ_INIT(&softc->lun_list); 2927229997Sken 2928229997Sken return (retval); 2929229997Sken} 2930