/* $NetBSD: subr_disk.c,v 1.79 2006/06/07 22:33:40 kardel Exp $ */ /*- * Copyright (c) 1996, 1997, 1999, 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1982, 1986, 1988, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)ufs_disksubr.c 8.5 (Berkeley) 1/21/94 */ #include __KERNEL_RCSID(0, "$NetBSD: subr_disk.c,v 1.79 2006/06/07 22:33:40 kardel Exp $"); #include #include #include #include #include #include #include #include #include /* * Compute checksum for disk label. */ u_int dkcksum(struct disklabel *lp) { u_short *start, *end; u_short sum = 0; start = (u_short *)lp; end = (u_short *)&lp->d_partitions[lp->d_npartitions]; while (start < end) sum ^= *start++; return (sum); } /* * Disk error is the preface to plaintive error messages * about failing disk transfers. It prints messages of the form hp0g: hard error reading fsbn 12345 of 12344-12347 (hp0 bn %d cn %d tn %d sn %d) * if the offset of the error in the transfer and a disk label * are both available. blkdone should be -1 if the position of the error * is unknown; the disklabel pointer may be null from drivers that have not * been converted to use them. The message is printed with printf * if pri is LOG_PRINTF, otherwise it uses log at the specified priority. * The message should be completed (with at least a newline) with printf * or addlog, respectively. There is no trailing space. */ #ifndef PRIdaddr #define PRIdaddr PRId64 #endif void diskerr(const struct buf *bp, const char *dname, const char *what, int pri, int blkdone, const struct disklabel *lp) { int unit = DISKUNIT(bp->b_dev), part = DISKPART(bp->b_dev); void (*pr)(const char *, ...); char partname = 'a' + part; daddr_t sn; if (/*CONSTCOND*/0) /* Compiler will error this is the format is wrong... */ printf("%" PRIdaddr, bp->b_blkno); if (pri != LOG_PRINTF) { static const char fmt[] = ""; log(pri, fmt); pr = addlog; } else pr = printf; (*pr)("%s%d%c: %s %sing fsbn ", dname, unit, partname, what, bp->b_flags & B_READ ? "read" : "writ"); sn = bp->b_blkno; if (bp->b_bcount <= DEV_BSIZE) (*pr)("%" PRIdaddr, sn); else { if (blkdone >= 0) { sn += blkdone; (*pr)("%" PRIdaddr " of ", sn); } (*pr)("%" PRIdaddr "-%" PRIdaddr "", bp->b_blkno, bp->b_blkno + (bp->b_bcount - 1) / DEV_BSIZE); } if (lp && (blkdone >= 0 || bp->b_bcount <= lp->d_secsize)) { sn += lp->d_partitions[part].p_offset; (*pr)(" (%s%d bn %" PRIdaddr "; cn %" PRIdaddr "", dname, unit, sn, sn / lp->d_secpercyl); sn %= lp->d_secpercyl; (*pr)(" tn %" PRIdaddr " sn %" PRIdaddr ")", sn / lp->d_nsectors, sn % lp->d_nsectors); } } /* * Searches the iostatlist for the disk corresponding to the * name provided. */ struct disk * disk_find(const char *name) { struct io_stats *stat; stat = iostat_find(name); if ((stat != NULL) && (stat->io_type == IOSTAT_DISK)) return stat->io_parent; return (NULL); } static void disk_init0(struct disk *diskp) { /* * Initialize the wedge-related locks and other fields. */ lockinit(&diskp->dk_rawlock, PRIBIO, "dkrawlk", 0, 0); lockinit(&diskp->dk_openlock, PRIBIO, "dkoplk", 0, 0); LIST_INIT(&diskp->dk_wedges); diskp->dk_nwedges = 0; } static void disk_attach0(struct disk *diskp) { /* * Allocate and initialize the disklabel structures. Note that * it's not safe to sleep here, since we're probably going to be * called during autoconfiguration. */ diskp->dk_label = malloc(sizeof(struct disklabel), M_DEVBUF, M_NOWAIT); diskp->dk_cpulabel = malloc(sizeof(struct cpu_disklabel), M_DEVBUF, M_NOWAIT); if ((diskp->dk_label == NULL) || (diskp->dk_cpulabel == NULL)) panic("disk_attach: can't allocate storage for disklabel"); memset(diskp->dk_label, 0, sizeof(struct disklabel)); memset(diskp->dk_cpulabel, 0, sizeof(struct cpu_disklabel)); /* * Set up the stats collection. */ diskp->dk_stats = iostat_alloc(IOSTAT_DISK); diskp->dk_stats->io_parent = (void *) diskp; diskp->dk_stats->io_name = diskp->dk_name; } static void disk_detach0(struct disk *diskp) { /* * Remove from the drivelist. */ iostat_free(diskp->dk_stats); /* * Free the space used by the disklabel structures. */ free(diskp->dk_label, M_DEVBUF); free(diskp->dk_cpulabel, M_DEVBUF); } /* * Attach a disk. */ void disk_attach(struct disk *diskp) { disk_init0(diskp); disk_attach0(diskp); } /* * Detach a disk. */ void disk_detach(struct disk *diskp) { (void) lockmgr(&diskp->dk_openlock, LK_DRAIN, NULL); disk_detach0(diskp); } /* * Initialize a pseudo disk. */ void pseudo_disk_init(struct disk *diskp) { disk_init0(diskp); } /* * Attach a pseudo disk. */ void pseudo_disk_attach(struct disk *diskp) { disk_attach0(diskp); } /* * Detach a pseudo disk. */ void pseudo_disk_detach(struct disk *diskp) { disk_detach0(diskp); } /* * Mark the disk as busy for metrics collection. */ void disk_busy(struct disk *diskp) { iostat_busy(diskp->dk_stats); } /* * Finished disk operations, gather metrics. */ void disk_unbusy(struct disk *diskp, long bcount, int read) { iostat_unbusy(diskp->dk_stats, bcount, read); } /* * Bounds checking against the media size, used for the raw partition. * The sector size passed in should currently always be DEV_BSIZE, * and the media size the size of the device in DEV_BSIZE sectors. */ int bounds_check_with_mediasize(struct buf *bp, int secsize, uint64_t mediasize) { int64_t sz; sz = howmany(bp->b_bcount, secsize); if (bp->b_blkno + sz > mediasize) { sz = mediasize - bp->b_blkno; if (sz == 0) { /* If exactly at end of disk, return EOF. */ bp->b_resid = bp->b_bcount; goto done; } if (sz < 0) { /* If past end of disk, return EINVAL. */ bp->b_error = EINVAL; goto bad; } /* Otherwise, truncate request. */ bp->b_bcount = sz << DEV_BSHIFT; } return 1; bad: bp->b_flags |= B_ERROR; done: return 0; }