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ctl_backend_block.c (276179) ctl_backend_block.c (276237)
1/*-
2 * Copyright (c) 2003 Silicon Graphics International Corp.
3 * Copyright (c) 2009-2011 Spectra Logic Corporation
4 * Copyright (c) 2012 The FreeBSD Foundation
5 * All rights reserved.
6 *
7 * Portions of this software were developed by Edward Tomasz Napierala
8 * under sponsorship from the FreeBSD Foundation.

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35 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend_block.c#5 $
36 */
37/*
38 * CAM Target Layer driver backend for block devices.
39 *
40 * Author: Ken Merry <ken@FreeBSD.org>
41 */
42#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 2003 Silicon Graphics International Corp.
3 * Copyright (c) 2009-2011 Spectra Logic Corporation
4 * Copyright (c) 2012 The FreeBSD Foundation
5 * All rights reserved.
6 *
7 * Portions of this software were developed by Edward Tomasz Napierala
8 * under sponsorship from the FreeBSD Foundation.

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35 * $Id: //depot/users/kenm/FreeBSD-test2/sys/cam/ctl/ctl_backend_block.c#5 $
36 */
37/*
38 * CAM Target Layer driver backend for block devices.
39 *
40 * Author: Ken Merry <ken@FreeBSD.org>
41 */
42#include <sys/cdefs.h>
43__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_backend_block.c 276179 2014-12-24 13:49:40Z mav $");
43__FBSDID("$FreeBSD: stable/10/sys/cam/ctl/ctl_backend_block.c 276237 2014-12-26 09:44:32Z mav $");
44
45#include <opt_kdtrace.h>
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/kernel.h>
50#include <sys/types.h>
51#include <sys/kthread.h>

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172 uint64_t size_blocks;
173 uint64_t size_bytes;
174 uint32_t blocksize;
175 int blocksize_shift;
176 uint16_t pblockexp;
177 uint16_t pblockoff;
178 uint16_t ublockexp;
179 uint16_t ublockoff;
44
45#include <opt_kdtrace.h>
46
47#include <sys/param.h>
48#include <sys/systm.h>
49#include <sys/kernel.h>
50#include <sys/types.h>
51#include <sys/kthread.h>

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172 uint64_t size_blocks;
173 uint64_t size_bytes;
174 uint32_t blocksize;
175 int blocksize_shift;
176 uint16_t pblockexp;
177 uint16_t pblockoff;
178 uint16_t ublockexp;
179 uint16_t ublockoff;
180 uint32_t atomicblock;
181 uint32_t opttxferlen;
180 struct ctl_be_block_softc *softc;
181 struct devstat *disk_stats;
182 ctl_be_block_lun_flags flags;
183 STAILQ_ENTRY(ctl_be_block_lun) links;
184 struct ctl_be_lun ctl_be_lun;
185 struct taskqueue *io_taskqueue;
186 struct task io_task;
187 int num_threads;

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1843 * sector long.
1844 */
1845 if (be_lun->size_bytes < be_lun->blocksize) {
1846 error = EINVAL;
1847 snprintf(req->error_str, sizeof(req->error_str),
1848 "file %s size %ju < block size %u", be_lun->dev_path,
1849 (uintmax_t)be_lun->size_bytes, be_lun->blocksize);
1850 }
182 struct ctl_be_block_softc *softc;
183 struct devstat *disk_stats;
184 ctl_be_block_lun_flags flags;
185 STAILQ_ENTRY(ctl_be_block_lun) links;
186 struct ctl_be_lun ctl_be_lun;
187 struct taskqueue *io_taskqueue;
188 struct task io_task;
189 int num_threads;

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1845 * sector long.
1846 */
1847 if (be_lun->size_bytes < be_lun->blocksize) {
1848 error = EINVAL;
1849 snprintf(req->error_str, sizeof(req->error_str),
1850 "file %s size %ju < block size %u", be_lun->dev_path,
1851 (uintmax_t)be_lun->size_bytes, be_lun->blocksize);
1852 }
1853
1854 be_lun->opttxferlen = CTLBLK_MAX_IO_SIZE / be_lun->blocksize;
1851 return (error);
1852}
1853
1854static int
1855ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req)
1856{
1857 struct ctl_lun_create_params *params;
1858 struct vattr vattr;
1859 struct cdev *dev;
1860 struct cdevsw *devsw;
1861 char *value;
1855 return (error);
1856}
1857
1858static int
1859ctl_be_block_open_dev(struct ctl_be_block_lun *be_lun, struct ctl_lun_req *req)
1860{
1861 struct ctl_lun_create_params *params;
1862 struct vattr vattr;
1863 struct cdev *dev;
1864 struct cdevsw *devsw;
1865 char *value;
1862 int error;
1866 int error, atomic, maxio;
1863 off_t ps, pss, po, pos, us, uss, uo, uos;
1864
1865 params = &be_lun->params;
1866
1867 be_lun->dev_type = CTL_BE_BLOCK_DEV;
1868 be_lun->backend.dev.cdev = be_lun->vn->v_rdev;
1869 be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev,
1870 &be_lun->backend.dev.dev_ref);
1871 if (be_lun->backend.dev.csw == NULL)
1872 panic("Unable to retrieve device switch");
1873 if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) {
1874 be_lun->dispatch = ctl_be_block_dispatch_zvol;
1875 be_lun->get_lba_status = ctl_be_block_gls_zvol;
1867 off_t ps, pss, po, pos, us, uss, uo, uos;
1868
1869 params = &be_lun->params;
1870
1871 be_lun->dev_type = CTL_BE_BLOCK_DEV;
1872 be_lun->backend.dev.cdev = be_lun->vn->v_rdev;
1873 be_lun->backend.dev.csw = dev_refthread(be_lun->backend.dev.cdev,
1874 &be_lun->backend.dev.dev_ref);
1875 if (be_lun->backend.dev.csw == NULL)
1876 panic("Unable to retrieve device switch");
1877 if (strcmp(be_lun->backend.dev.csw->d_name, "zvol") == 0) {
1878 be_lun->dispatch = ctl_be_block_dispatch_zvol;
1879 be_lun->get_lba_status = ctl_be_block_gls_zvol;
1876 } else
1880 atomic = maxio = CTLBLK_MAX_IO_SIZE;
1881 } else {
1877 be_lun->dispatch = ctl_be_block_dispatch_dev;
1882 be_lun->dispatch = ctl_be_block_dispatch_dev;
1883 atomic = 0;
1884 maxio = be_lun->backend.dev.cdev->si_iosize_max;
1885 if (maxio <= 0)
1886 maxio = DFLTPHYS;
1887 if (maxio > CTLBLK_MAX_IO_SIZE)
1888 maxio = CTLBLK_MAX_IO_SIZE;
1889 }
1878 be_lun->lun_flush = ctl_be_block_flush_dev;
1879 be_lun->unmap = ctl_be_block_unmap_dev;
1880 be_lun->getattr = ctl_be_block_getattr_dev;
1881
1882 error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED);
1883 if (error) {
1884 snprintf(req->error_str, sizeof(req->error_str),
1885 "error getting vnode attributes for device %s",

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2000 uss = us / be_lun->blocksize;
2001 uos = uo / be_lun->blocksize;
2002 if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) &&
2003 ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) {
2004 be_lun->ublockexp = fls(uss) - 1;
2005 be_lun->ublockoff = (uss - uos) % uss;
2006 }
2007
1890 be_lun->lun_flush = ctl_be_block_flush_dev;
1891 be_lun->unmap = ctl_be_block_unmap_dev;
1892 be_lun->getattr = ctl_be_block_getattr_dev;
1893
1894 error = VOP_GETATTR(be_lun->vn, &vattr, NOCRED);
1895 if (error) {
1896 snprintf(req->error_str, sizeof(req->error_str),
1897 "error getting vnode attributes for device %s",

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2012 uss = us / be_lun->blocksize;
2013 uos = uo / be_lun->blocksize;
2014 if ((uss > 0) && (uss * be_lun->blocksize == us) && (uss >= uos) &&
2015 ((uss & (uss - 1)) == 0) && (uos * be_lun->blocksize == uo)) {
2016 be_lun->ublockexp = fls(uss) - 1;
2017 be_lun->ublockoff = (uss - uos) % uss;
2018 }
2019
2020 be_lun->atomicblock = atomic / be_lun->blocksize;
2021 be_lun->opttxferlen = maxio / be_lun->blocksize;
2008 return (0);
2009}
2010
2011static int
2012ctl_be_block_close(struct ctl_be_block_lun *be_lun)
2013{
2014 DROP_GIANT();
2015 if (be_lun->vn) {

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2266 be_lun->ctl_be_lun.be_lun = be_lun;
2267 be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ?
2268 0 : (be_lun->size_blocks - 1);
2269 be_lun->ctl_be_lun.blocksize = be_lun->blocksize;
2270 be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp;
2271 be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff;
2272 be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp;
2273 be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff;
2022 return (0);
2023}
2024
2025static int
2026ctl_be_block_close(struct ctl_be_block_lun *be_lun)
2027{
2028 DROP_GIANT();
2029 if (be_lun->vn) {

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2280 be_lun->ctl_be_lun.be_lun = be_lun;
2281 be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ?
2282 0 : (be_lun->size_blocks - 1);
2283 be_lun->ctl_be_lun.blocksize = be_lun->blocksize;
2284 be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp;
2285 be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff;
2286 be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp;
2287 be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff;
2274 if (be_lun->dispatch == ctl_be_block_dispatch_zvol &&
2275 be_lun->blocksize != 0)
2276 be_lun->ctl_be_lun.atomicblock = CTLBLK_MAX_IO_SIZE /
2277 be_lun->blocksize;
2288 be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock;
2289 be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen;
2278 /* Tell the user the blocksize we ended up using */
2279 params->lun_size_bytes = be_lun->size_bytes;
2280 params->blocksize_bytes = be_lun->blocksize;
2281 if (params->flags & CTL_LUN_FLAG_ID_REQ) {
2282 be_lun->ctl_be_lun.req_lun_id = params->req_lun_id;
2283 be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ;
2284 } else
2285 be_lun->ctl_be_lun.req_lun_id = 0;

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2647 */
2648 be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ?
2649 0 : (be_lun->size_blocks - 1);
2650 be_lun->ctl_be_lun.blocksize = be_lun->blocksize;
2651 be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp;
2652 be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff;
2653 be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp;
2654 be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff;
2290 /* Tell the user the blocksize we ended up using */
2291 params->lun_size_bytes = be_lun->size_bytes;
2292 params->blocksize_bytes = be_lun->blocksize;
2293 if (params->flags & CTL_LUN_FLAG_ID_REQ) {
2294 be_lun->ctl_be_lun.req_lun_id = params->req_lun_id;
2295 be_lun->ctl_be_lun.flags |= CTL_LUN_FLAG_ID_REQ;
2296 } else
2297 be_lun->ctl_be_lun.req_lun_id = 0;

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2659 */
2660 be_lun->ctl_be_lun.maxlba = (be_lun->size_blocks == 0) ?
2661 0 : (be_lun->size_blocks - 1);
2662 be_lun->ctl_be_lun.blocksize = be_lun->blocksize;
2663 be_lun->ctl_be_lun.pblockexp = be_lun->pblockexp;
2664 be_lun->ctl_be_lun.pblockoff = be_lun->pblockoff;
2665 be_lun->ctl_be_lun.ublockexp = be_lun->ublockexp;
2666 be_lun->ctl_be_lun.ublockoff = be_lun->ublockoff;
2655 if (be_lun->dispatch == ctl_be_block_dispatch_zvol &&
2656 be_lun->blocksize != 0)
2657 be_lun->ctl_be_lun.atomicblock = CTLBLK_MAX_IO_SIZE /
2658 be_lun->blocksize;
2667 be_lun->ctl_be_lun.atomicblock = be_lun->atomicblock;
2668 be_lun->ctl_be_lun.opttxferlen = be_lun->opttxferlen;
2659 ctl_lun_capacity_changed(&be_lun->ctl_be_lun);
2660 if (oldsize == 0 && be_lun->size_blocks != 0)
2661 ctl_lun_online(&be_lun->ctl_be_lun);
2662 }
2663
2664 /* Tell the user the exact size we ended up using */
2665 params->lun_size_bytes = be_lun->size_bytes;
2666

--- 245 unchanged lines hidden --- 		2669 ctl_lun_capacity_changed(&be_lun->ctl_be_lun);
2670 if (oldsize == 0 && be_lun->size_blocks != 0)
2671 ctl_lun_online(&be_lun->ctl_be_lun);
2672 }
2673
2674 /* Tell the user the exact size we ended up using */
2675 params->lun_size_bytes = be_lun->size_bytes;
2676

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