1/*- 2 * Copyright (c) 2002 Poul-Henning Kamp 3 * Copyright (c) 2002 Networks Associates Technology, Inc. 4 * All rights reserved. 5 * 6 * This software was developed for the FreeBSD Project by Poul-Henning Kamp 7 * and NAI Labs, the Security Research Division of Network Associates, Inc. 8 * under DARPA/SPAWAR contract N66001-01-C-8035 ("CBOSS"), as part of the --- 18 unchanged lines hidden (view full) --- 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * |
35 * $FreeBSD: head/sys/geom/geom_disk.c 110052 2003-01-29 19:47:25Z phk $ |
36 */ 37 38#include "opt_geom.h" |
39 40#include <sys/param.h> 41#include <sys/systm.h> 42#include <sys/kernel.h> 43#include <sys/sysctl.h> 44#include <sys/bio.h> 45#include <sys/conf.h> 46#include <sys/disk.h> --- 14 unchanged lines hidden (view full) --- 61 "DISK", 62 NULL, 63 NULL, 64 G_CLASS_INITIALIZER 65}; 66 67DECLARE_GEOM_CLASS(g_disk_class, g_disk); 68 |
69static void __inline 70g_disk_lock_giant(struct disk *dp) 71{ 72 if (!(dp->d_devsw->d_flags & D_NOGIANT)) 73 mtx_lock(&Giant); 74} 75 76static void __inline 77g_disk_unlock_giant(struct disk *dp) 78{ 79 if (!(dp->d_devsw->d_flags & D_NOGIANT)) 80 mtx_unlock(&Giant); 81} 82 |
83static int 84g_disk_access(struct g_provider *pp, int r, int w, int e) 85{ 86 struct disk *dp; 87 dev_t dev; 88 int error; 89 90 g_trace(G_T_ACCESS, "g_disk_access(%s, %d, %d, %d)", 91 pp->name, r, w, e); 92 g_topology_assert(); 93 r += pp->acr; 94 w += pp->acw; 95 e += pp->ace; 96 dp = pp->geom->softc; 97 dev = dp->d_dev; 98 if ((pp->acr + pp->acw + pp->ace) == 0 && (r + w + e) > 0) { |
99 g_disk_lock_giant(dp); |
100 error = devsw(dev)->d_open(dev, 3, 0, NULL); 101 if (error != 0) 102 printf("Opened disk %s -> %d\n", pp->name, error); |
103 g_disk_unlock_giant(dp); |
104 pp->mediasize = dp->d_mediasize; 105 pp->sectorsize = dp->d_sectorsize; 106 } else if ((pp->acr + pp->acw + pp->ace) > 0 && (r + w + e) == 0) { |
107 g_disk_lock_giant(dp); |
108 error = devsw(dev)->d_close(dev, 3, 0, NULL); 109 if (error != 0) 110 printf("Closed disk %s -> %d\n", pp->name, error); |
111 g_disk_unlock_giant(dp); |
112 } else { 113 error = 0; 114 } 115 return (error); 116} 117 118static void 119g_disk_kerneldump(struct bio *bp, struct disk *dp) --- 14 unchanged lines hidden (view full) --- 134 di.mediasize = gkd->length; 135 error = set_dumper(&di); 136 g_io_deliver(bp, error); 137} 138 139static void 140g_disk_done(struct bio *bp) 141{ |
142 struct disk *dp; |
143 |
144 dp = bp->bio_caller1; |
145 bp->bio_completed = bp->bio_length - bp->bio_resid; |
146 if (!(dp->d_devsw->d_flags & D_NOGIANT)) { 147 DROP_GIANT(); 148 g_std_done(bp); 149 PICKUP_GIANT(); 150 } else { 151 g_std_done(bp); 152 } |
153} 154 155static void 156g_disk_start(struct bio *bp) 157{ 158 struct bio *bp2; 159 dev_t dev; 160 struct disk *dp; --- 13 unchanged lines hidden (view full) --- 174 case BIO_READ: 175 case BIO_WRITE: 176 bp2 = g_clone_bio(bp); 177 bp2->bio_done = g_disk_done; 178 bp2->bio_blkno = bp2->bio_offset >> DEV_BSHIFT; 179 bp2->bio_pblkno = bp2->bio_offset / dp->d_sectorsize; 180 bp2->bio_bcount = bp2->bio_length; 181 bp2->bio_dev = dev; |
182 bp2->bio_caller1 = dp; 183 g_disk_lock_giant(dp); |
184 devsw(dev)->d_strategy(bp2); |
185 g_disk_unlock_giant(dp); |
186 break; 187 case BIO_GETATTR: 188 if (g_handleattr_int(bp, "GEOM::fwsectors", dp->d_fwsectors)) 189 break; 190 else if (g_handleattr_int(bp, "GEOM::fwheads", dp->d_fwheads)) 191 break; 192 else if (g_handleattr_off_t(bp, "GEOM::frontstuff", 0)) 193 break; --- 138 unchanged lines hidden (view full) --- 332 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1); 333 sbuf_delete(sb); 334 return error; 335} 336 337SYSCTL_PROC(_kern, OID_AUTO, disks, CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NOLOCK, 0, 0, 338 sysctl_disks, "A", "names of available disks"); 339 |