/* $OpenBSD: rf_openbsdkintf.c,v 1.9 2000/01/11 18:02:22 peter Exp $ */ /* $NetBSD: rf_netbsdkintf.c,v 1.46 2000/01/09 03:39:13 oster Exp $ */ /*- * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Greg Oster; Jason R. Thorpe. * * 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) 1988 University of Utah. * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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 University of * California, Berkeley and its contributors. * 4. 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. * * from: Utah $Hdr: cd.c 1.6 90/11/28$ * * @(#)cd.c 8.2 (Berkeley) 11/16/93 */ /* * Copyright (c) 1995 Carnegie-Mellon University. * All rights reserved. * * Authors: Mark Holland, Jim Zelenka * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ /*********************************************************** * * rf_kintf.c -- the kernel interface routines for RAIDframe * ***********************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "raid.h" #include "rf_raid.h" #include "rf_raidframe.h" #include "rf_copyback.h" #include "rf_dag.h" #include "rf_dagflags.h" #include "rf_diskqueue.h" #include "rf_acctrace.h" #include "rf_etimer.h" #include "rf_general.h" #include "rf_debugMem.h" #include "rf_kintf.h" #include "rf_options.h" #include "rf_driver.h" #include "rf_parityscan.h" #include "rf_debugprint.h" #include "rf_threadstuff.h" int rf_kdebug_level = 0; #ifdef RAIDDEBUG #define db1_printf(a) do if (rf_kdebug_level > 0) printf a; while(0) #else /* RAIDDEBUG */ #define db1_printf(a) (void)0 #endif /* RAIDDEBUG */ static RF_Raid_t **raidPtrs; /* global raid device descriptors */ RF_DECLARE_STATIC_MUTEX(rf_sparet_wait_mutex) /* requests to install a spare table */ static RF_SparetWait_t *rf_sparet_wait_queue; /* responses from installation process */ static RF_SparetWait_t *rf_sparet_resp_queue; /* prototypes */ void rf_KernelWakeupFunc __P((struct buf *)); void rf_InitBP __P((struct buf *, struct vnode *, unsigned, dev_t, RF_SectorNum_t, RF_SectorCount_t, caddr_t, void (*)(struct buf *), void *, int, struct proc *)); static int raidinit __P((dev_t, RF_Raid_t *, int)); void raidattach __P((int)); int raidsize __P((dev_t)); int raidopen __P((dev_t, int, int, struct proc *)); int raidclose __P((dev_t, int, int, struct proc *)); int raidioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); int raidwrite __P((dev_t, struct uio *, int)); int raidread __P((dev_t, struct uio *, int)); void raidstrategy __P((struct buf *)); int raiddump __P((dev_t, daddr_t, caddr_t, size_t)); /* * Pilfered from ccd.c */ struct raidbuf { struct buf rf_buf; /* new I/O buf. MUST BE FIRST!!! */ struct buf *rf_obp; /* ptr. to original I/O buf */ int rf_flags; /* misc. flags */ RF_DiskQueueData_t *req;/* the request that this was part of.. */ }; #define RAIDGETBUF() malloc(sizeof (struct raidbuf), M_RAIDFRAME, M_NOWAIT) #define RAIDPUTBUF(buf) free(buf, M_RAIDFRAME) /* * XXX Not sure if the following should be replacing the raidPtrs above, * or if it should be used in conjunction with that... */ struct raid_softc { int sc_flags; /* flags */ int sc_cflags; /* configuration flags */ size_t sc_size; /* size of the raid device */ dev_t sc_dev; /* our device..*/ char sc_xname[20]; /* XXX external name */ struct disk sc_dkdev; /* generic disk device info */ struct buf buf_queue; /* used for the device queue */ }; /* sc_flags */ #define RAIDF_INITED 0x01 /* unit has been initialized */ #define RAIDF_WLABEL 0x02 /* label area is writable */ #define RAIDF_LABELLING 0x04 /* unit is currently being labelled */ #define RAIDF_WANTED 0x40 /* someone is waiting to obtain a lock */ #define RAIDF_LOCKED 0x80 /* unit is locked */ #define raidunit(x) DISKUNIT(x) static int numraid = 0; /* * Allow RAIDOUTSTANDING number of simultaneous IO's to this RAID device. * Be aware that large numbers can allow the driver to consume a lot of * kernel memory, especially on writes, and in degraded mode reads. * * For example: with a stripe width of 64 blocks (32k) and 5 disks, * a single 64K write will typically require 64K for the old data, * 64K for the old parity, and 64K for the new parity, for a total * of 192K (if the parity buffer is not re-used immediately). * Even it if is used immedately, that's still 128K, which when multiplied * by say 10 requests, is 1280K, *on top* of the 640K of incoming data. * * Now in degraded mode, for example, a 64K read on the above setup may * require data reconstruction, which will require *all* of the 4 remaining * disks to participate -- 4 * 32K/disk == 128K again. */ #ifndef RAIDOUTSTANDING #define RAIDOUTSTANDING 6 #endif #define RAIDLABELDEV(dev) \ (MAKEDISKDEV(major((dev)), raidunit((dev)), RAW_PART)) /* declared here, and made public, for the benefit of KVM stuff.. */ struct raid_softc *raid_softc; void raidgetdefaultlabel __P((RF_Raid_t *, struct raid_softc *, struct disklabel *)); void raidgetdisklabel __P((dev_t)); void raidmakedisklabel __P((struct raid_softc *)); int raidlock __P((struct raid_softc *)); void raidunlock __P((struct raid_softc *)); void rf_markalldirty __P((RF_Raid_t *)); void rf_ReconThread __P((struct rf_recon_req *)); /* XXX what I want is: */ /*void rf_ReconThread __P((RF_Raid_t *raidPtr)); */ void rf_RewriteParityThread __P((RF_Raid_t *raidPtr)); void rf_CopybackThread __P((RF_Raid_t *raidPtr)); void rf_ReconstructInPlaceThread __P((struct rf_recon_req *)); void raidattach(num) int num; { int raidID; int i, rc; db1_printf(("raidattach: Asked for %d units\n", num)); if (num <= 0) { #ifdef DIAGNOSTIC panic("raidattach: count <= 0"); #endif return; } /* This is where all the initialization stuff gets done. */ /* Make some space for requested number of units... */ RF_Calloc(raidPtrs, num, sizeof(RF_Raid_t *), (RF_Raid_t **)); if (raidPtrs == NULL) { panic("raidPtrs is NULL!!\n"); } rc = rf_mutex_init(&rf_sparet_wait_mutex); if (rc) { RF_PANIC(); } rf_sparet_wait_queue = rf_sparet_resp_queue = NULL; for (i = 0; i < numraid; i++) raidPtrs[i] = NULL; rc = rf_BootRaidframe(); if (rc == 0) printf("Kernelized RAIDframe activated\n"); else panic("Serious error booting RAID!!\n"); /* * Put together some datastructures like the CCD device does.. * This lets us lock the device and what-not when it gets opened. */ raid_softc = (struct raid_softc *) malloc(num * sizeof (struct raid_softc), M_RAIDFRAME, M_NOWAIT); if (raid_softc == NULL) { printf("WARNING: no memory for RAIDframe driver\n"); return; } numraid = num; bzero(raid_softc, num * sizeof (struct raid_softc)); for (raidID = 0; raidID < num; raidID++) { raid_softc[raidID].buf_queue.b_actf = NULL; raid_softc[raidID].buf_queue.b_actb = &raid_softc[raidID].buf_queue.b_actf; RF_Calloc(raidPtrs[raidID], 1, sizeof (RF_Raid_t), (RF_Raid_t *)); if (raidPtrs[raidID] == NULL) { printf("WARNING: raidPtrs[%d] is NULL\n", raidID); numraid = raidID; return; } } } int raidsize(dev) dev_t dev; { struct raid_softc *rs; struct disklabel *lp; int part, unit, omask, size; unit = raidunit(dev); if (unit >= numraid) return (-1); rs = &raid_softc[unit]; if ((rs->sc_flags & RAIDF_INITED) == 0) return (-1); part = DISKPART(dev); omask = rs->sc_dkdev.dk_openmask & (1 << part); lp = rs->sc_dkdev.dk_label; if (omask == 0 && raidopen(dev, 0, S_IFBLK, curproc)) return (-1); if (lp->d_partitions[part].p_fstype != FS_SWAP) size = -1; else size = lp->d_partitions[part].p_size * (lp->d_secsize / DEV_BSIZE); if (omask == 0 && raidclose(dev, 0, S_IFBLK, curproc)) return (-1); return (size); } int raiddump(dev, blkno, va, size) dev_t dev; daddr_t blkno; caddr_t va; size_t size; { /* Not implemented. */ return (ENXIO); } /* ARGSUSED */ int raidopen(dev, flags, fmt, p) dev_t dev; int flags, fmt; struct proc *p; { int unit = raidunit(dev); struct raid_softc *rs; struct disklabel *lp; int part,pmask; int error = 0; if (unit >= numraid) return (ENXIO); rs = &raid_softc[unit]; if ((error = raidlock(rs)) != 0) return (error); lp = rs->sc_dkdev.dk_label; part = DISKPART(dev); pmask = (1 << part); db1_printf( ("Opening raid device number: %d partition: %d\n", unit, part)); if ((rs->sc_flags & RAIDF_INITED) && (rs->sc_dkdev.dk_openmask == 0)) raidgetdisklabel(dev); /* make sure that this partition exists */ if (part != RAW_PART) { db1_printf(("Not a raw partition..\n")); if (((rs->sc_flags & RAIDF_INITED) == 0) || ((part >= lp->d_npartitions) || (lp->d_partitions[part].p_fstype == FS_UNUSED))) { error = ENXIO; raidunlock(rs); db1_printf(("Bailing out...\n")); return (error); } } /* Prevent this unit from being unconfigured while open. */ switch (fmt) { case S_IFCHR: rs->sc_dkdev.dk_copenmask |= pmask; break; case S_IFBLK: rs->sc_dkdev.dk_bopenmask |= pmask; break; } if ((rs->sc_dkdev.dk_openmask == 0) && ((rs->sc_flags & RAIDF_INITED) != 0)) { /* First one... mark things as dirty... Note that we *MUST* have done a configure before this. I DO NOT WANT TO BE SCRIBBLING TO RANDOM COMPONENTS UNTIL IT'S BEEN DETERMINED THAT THEY BELONG TOGETHER!!!!! */ /* XXX should check to see if we're only open for reading here... If so, we needn't do this, but then need some other way of keeping track of what's happened.. */ rf_markalldirty( raidPtrs[unit] ); } rs->sc_dkdev.dk_openmask = rs->sc_dkdev.dk_copenmask | rs->sc_dkdev.dk_bopenmask; raidunlock(rs); return (error); } /* ARGSUSED */ int raidclose(dev, flags, fmt, p) dev_t dev; int flags, fmt; struct proc *p; { int unit = raidunit(dev); struct raid_softc *rs; int error = 0; int part; if (unit >= numraid) return (ENXIO); rs = &raid_softc[unit]; if ((error = raidlock(rs)) != 0) return (error); part = DISKPART(dev); /* ...that much closer to allowing unconfiguration... */ switch (fmt) { case S_IFCHR: rs->sc_dkdev.dk_copenmask &= ~(1 << part); break; case S_IFBLK: rs->sc_dkdev.dk_bopenmask &= ~(1 << part); break; } rs->sc_dkdev.dk_openmask = rs->sc_dkdev.dk_copenmask | rs->sc_dkdev.dk_bopenmask; if ((rs->sc_dkdev.dk_openmask == 0) && ((rs->sc_flags & RAIDF_INITED) != 0)) { /* Last one... device is not unconfigured yet. Device shutdown has taken care of setting the clean bits if RAIDF_INITED is not set mark things as clean... */ rf_update_component_labels( raidPtrs[unit] ); } raidunlock(rs); return (0); } void raidstrategy(bp) struct buf *bp; { int s; unsigned int raidID = raidunit(bp->b_dev); RF_Raid_t *raidPtr; struct raid_softc *rs = &raid_softc[raidID]; struct disklabel *lp; struct buf *dp; int wlabel; if ((rs->sc_flags & RAIDF_INITED) ==0) { bp->b_error = ENXIO; bp->b_flags = B_ERROR; bp->b_resid = bp->b_bcount; biodone(bp); return; } if (raidID >= numraid || !raidPtrs[raidID]) { bp->b_error = ENODEV; bp->b_flags |= B_ERROR; bp->b_resid = bp->b_bcount; biodone(bp); return; } raidPtr = raidPtrs[raidID]; if (!raidPtr->valid) { bp->b_error = ENODEV; bp->b_flags |= B_ERROR; bp->b_resid = bp->b_bcount; biodone(bp); return; } if (bp->b_bcount == 0) { db1_printf(("b_bcount is zero..\n")); biodone(bp); return; } lp = rs->sc_dkdev.dk_label; /* * Do bounds checking and adjust transfer. If there's an * error, the bounds check will flag that for us. */ wlabel = rs->sc_flags & (RAIDF_WLABEL | RAIDF_LABELLING); if (DISKPART(bp->b_dev) != RAW_PART) if (bounds_check_with_label(bp, lp, rs->sc_dkdev.dk_cpulabel, wlabel) <= 0) { db1_printf(("Bounds check failed!!:%d %d\n", (int)bp->b_blkno, (int)wlabel)); biodone(bp); return; } s = splbio(); bp->b_resid = 0; /* stuff it onto our queue */ dp = &rs->buf_queue; bp->b_actf = NULL; bp->b_actb = dp->b_actb; *dp->b_actb = bp; dp->b_actb = &bp->b_actf; raidstart(raidPtrs[raidID]); splx(s); } /* ARGSUSED */ int raidread(dev, uio, flags) dev_t dev; struct uio *uio; int flags; { int unit = raidunit(dev); struct raid_softc *rs; int part; if (unit >= numraid) return (ENXIO); rs = &raid_softc[unit]; if ((rs->sc_flags & RAIDF_INITED) == 0) return (ENXIO); part = DISKPART(dev); db1_printf(("raidread: unit: %d partition: %d\n", unit, part)); return (physio(raidstrategy, NULL, dev, B_READ, minphys, uio)); } /* ARGSUSED */ int raidwrite(dev, uio, flags) dev_t dev; struct uio *uio; int flags; { int unit = raidunit(dev); struct raid_softc *rs; if (unit >= numraid) return (ENXIO); rs = &raid_softc[unit]; if ((rs->sc_flags & RAIDF_INITED) == 0) return (ENXIO); db1_printf(("raidwrite\n")); return (physio(raidstrategy, NULL, dev, B_WRITE, minphys, uio)); } int raidioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; caddr_t data; int flag; struct proc *p; { int unit = raidunit(dev); int error = 0; int part, pmask; struct raid_softc *rs; RF_Config_t *k_cfg, *u_cfg; RF_Raid_t *raidPtr; RF_AccTotals_t *totals; RF_DeviceConfig_t *d_cfg, **ucfgp; u_char *specific_buf; int retcode = 0; int row; int column; struct rf_recon_req *rrcopy, *rr; RF_ComponentLabel_t *component_label; RF_ComponentLabel_t ci_label; RF_ComponentLabel_t **c_label_ptr; RF_SingleComponent_t *sparePtr,*componentPtr; RF_SingleComponent_t hot_spare; RF_SingleComponent_t component; int i, j, d; if (unit >= numraid) return (ENXIO); rs = &raid_softc[unit]; raidPtr = raidPtrs[unit]; db1_printf(("raidioctl: %d %d %d %d\n", (int)dev, (int)DISKPART(dev), (int)unit, (int)cmd)); /* Must be open for writes for these commands... */ switch (cmd) { case DIOCSDINFO: case DIOCWDINFO: case DIOCWLABEL: if ((flag & FWRITE) == 0) return (EBADF); } /* Must be initialized for these... */ switch (cmd) { case DIOCGDINFO: case DIOCSDINFO: case DIOCWDINFO: case DIOCGPART: case DIOCWLABEL: case RAIDFRAME_SHUTDOWN: case RAIDFRAME_REWRITEPARITY: case RAIDFRAME_GET_INFO: case RAIDFRAME_RESET_ACCTOTALS: case RAIDFRAME_GET_ACCTOTALS: case RAIDFRAME_KEEP_ACCTOTALS: case RAIDFRAME_GET_SIZE: case RAIDFRAME_FAIL_DISK: case RAIDFRAME_COPYBACK: case RAIDFRAME_CHECK_RECON_STATUS: case RAIDFRAME_GET_COMPONENT_LABEL: case RAIDFRAME_SET_COMPONENT_LABEL: case RAIDFRAME_ADD_HOT_SPARE: case RAIDFRAME_REMOVE_HOT_SPARE: case RAIDFRAME_INIT_LABELS: case RAIDFRAME_REBUILD_IN_PLACE: case RAIDFRAME_CHECK_PARITY: case RAIDFRAME_CHECK_PARITYREWRITE_STATUS: case RAIDFRAME_CHECK_COPYBACK_STATUS: if ((rs->sc_flags & RAIDF_INITED) == 0) return (ENXIO); } switch (cmd) { /* Configure the system */ case RAIDFRAME_CONFIGURE: /* * Copy-in the configuration information * data points to a pointer to the configuration structure. */ u_cfg = *((RF_Config_t **)data); RF_Malloc(k_cfg, sizeof (RF_Config_t), (RF_Config_t *)); if (k_cfg == NULL) { return (ENOMEM); } retcode = copyin((caddr_t)u_cfg, (caddr_t)k_cfg, sizeof (RF_Config_t)); if (retcode) { RF_Free(k_cfg, sizeof(RF_Config_t)); return (retcode); } /* * Allocate a buffer for the layout-specific data, * and copy it in. */ if (k_cfg->layoutSpecificSize) { if (k_cfg->layoutSpecificSize > 10000) { /* sanity check */ RF_Free(k_cfg, sizeof(RF_Config_t)); return (EINVAL); } RF_Malloc(specific_buf, k_cfg->layoutSpecificSize, (u_char *)); if (specific_buf == NULL) { RF_Free(k_cfg, sizeof (RF_Config_t)); return (ENOMEM); } retcode = copyin(k_cfg->layoutSpecific, (caddr_t)specific_buf, k_cfg->layoutSpecificSize); if (retcode) { RF_Free(k_cfg, sizeof(RF_Config_t)); RF_Free(specific_buf, k_cfg->layoutSpecificSize); return (retcode); } } else specific_buf = NULL; k_cfg->layoutSpecific = specific_buf; /* * We should do some kind of sanity check on the * configuration. * Store the sum of all the bytes in the last byte? */ /* configure the system */ raidPtr->raidid = unit; retcode = rf_Configure(raidPtr, k_cfg); if (retcode == 0) { /* allow this many simultaneous IO's to this RAID device */ raidPtr->openings = RAIDOUTSTANDING; /* XXX should be moved to rf_Configure() */ raidPtr->copyback_in_progress = 0; raidPtr->parity_rewrite_in_progress = 0; raidPtr->recon_in_progress = 0; retcode = raidinit(dev, raidPtr, unit); rf_markalldirty( raidPtr ); } /* Free the buffers. No return code here. */ if (k_cfg->layoutSpecificSize) { RF_Free(specific_buf, k_cfg->layoutSpecificSize); } RF_Free(k_cfg, sizeof (RF_Config_t)); return (retcode); case RAIDFRAME_SHUTDOWN: /* Shutdown the system */ if ((error = raidlock(rs)) != 0) return (error); /* * If somebody has a partition mounted, we shouldn't * shutdown. */ part = DISKPART(dev); pmask = (1 << part); if ((rs->sc_dkdev.dk_openmask & ~pmask) || ((rs->sc_dkdev.dk_bopenmask & pmask) && (rs->sc_dkdev.dk_copenmask & pmask))) { raidunlock(rs); return (EBUSY); } retcode = rf_Shutdown(raidPtr); /* It's no longer initialized... */ rs->sc_flags &= ~RAIDF_INITED; /* Detach the disk. */ disk_detach(&rs->sc_dkdev); raidunlock(rs); return (retcode); case RAIDFRAME_GET_COMPONENT_LABEL: c_label_ptr = (RF_ComponentLabel_t **) data; /* need to read the component label for the disk indicated by row,column in component_label */ /* For practice, let's get it directly fromdisk, rather than from the in-core copy */ RF_Malloc( component_label, sizeof( RF_ComponentLabel_t ), (RF_ComponentLabel_t *)); if (component_label == NULL) return (ENOMEM); bzero((char *) component_label, sizeof(RF_ComponentLabel_t)); retcode = copyin( *c_label_ptr, component_label, sizeof(RF_ComponentLabel_t)); if (retcode) { RF_Free( component_label, sizeof(RF_ComponentLabel_t)); return(retcode); } row = component_label->row; column = component_label->column; if ((row < 0) || (row >= raidPtr->numRow) || (column < 0) || (column >= raidPtr->numCol)) { return(EINVAL); } raidread_component_label( raidPtr->Disks[row][column].dev, raidPtr->raid_cinfo[row][column].ci_vp, component_label ); retcode = copyout((caddr_t) component_label, (caddr_t) *c_label_ptr, sizeof(RF_ComponentLabel_t)); RF_Free( component_label, sizeof(RF_ComponentLabel_t)); return (retcode); case RAIDFRAME_SET_COMPONENT_LABEL: component_label = (RF_ComponentLabel_t *) data; /* XXX check the label for valid stuff... */ /* Note that some things *should not* get modified -- the user should be re-initing the labels instead of trying to patch things. */ printf("Got component label:\n"); printf("Version: %d\n",component_label->version); printf("Serial Number: %d\n",component_label->serial_number); printf("Mod counter: %d\n",component_label->mod_counter); printf("Row: %d\n", component_label->row); printf("Column: %d\n", component_label->column); printf("Num Rows: %d\n", component_label->num_rows); printf("Num Columns: %d\n", component_label->num_columns); printf("Clean: %d\n", component_label->clean); printf("Status: %d\n", component_label->status); row = component_label->row; column = component_label->column; if ((row < 0) || (row >= raidPtr->numRow) || (column < 0) || (column >= raidPtr->numCol)) { RF_Free( component_label, sizeof(RF_ComponentLabel_t)); return(EINVAL); } /* XXX this isn't allowed to do anything for now :-) */ #if 0 raidwrite_component_label( raidPtr->Disks[row][column].dev, raidPtr->raid_cinfo[row][column].ci_vp, component_label ); #endif return (0); case RAIDFRAME_INIT_LABELS: component_label = (RF_ComponentLabel_t *) data; /* we only want the serial number from the above. We get all the rest of the information from the config that was used to create this RAID set. */ raidPtr->serial_number = component_label->serial_number; /* current version number */ ci_label.version = RF_COMPONENT_LABEL_VERSION; ci_label.serial_number = component_label->serial_number; ci_label.mod_counter = raidPtr->mod_counter; ci_label.num_rows = raidPtr->numRow; ci_label.num_columns = raidPtr->numCol; ci_label.clean = RF_RAID_DIRTY; /* not clean */ ci_label.status = rf_ds_optimal; /* "It's good!" */ for(row=0;rownumRow;row++) { ci_label.row = row; for(column=0;columnnumCol;column++) { ci_label.column = column; raidwrite_component_label( raidPtr->Disks[row][column].dev, raidPtr->raid_cinfo[row][column].ci_vp, &ci_label ); } } return (retcode); case RAIDFRAME_REWRITEPARITY: if (raidPtr->Layout.map->faultsTolerated == 0) { /* Parity for RAID 0 is trivially correct */ raidPtr->parity_good = RF_RAID_CLEAN; return(0); } if (raidPtr->parity_rewrite_in_progress == 1) { /* Re-write is already in progress! */ return(EINVAL); } retcode = RF_CREATE_THREAD(raidPtr->parity_rewrite_thread, rf_RewriteParityThread, raidPtr,"raid_parity"); return (retcode); case RAIDFRAME_ADD_HOT_SPARE: sparePtr = (RF_SingleComponent_t *) data; memcpy( &hot_spare, sparePtr, sizeof(RF_SingleComponent_t)); printf("Adding spare\n"); retcode = rf_add_hot_spare(raidPtr, &hot_spare); return(retcode); case RAIDFRAME_REMOVE_HOT_SPARE: return(retcode); case RAIDFRAME_REBUILD_IN_PLACE: if (raidPtr->Layout.map->faultsTolerated == 0) { /* Can't do this on a RAID 0!! */ return(EINVAL); } if (raidPtr->recon_in_progress == 1) { /* a reconstruct is already in progress! */ return(EINVAL); } componentPtr = (RF_SingleComponent_t *) data; memcpy( &component, componentPtr, sizeof(RF_SingleComponent_t)); row = component.row; column = component.column; printf("Rebuild: %d %d\n",row, column); if ((row < 0) || (row >= raidPtr->numRow) || (column < 0) || (column >= raidPtr->numCol)) { return(EINVAL); } RF_Malloc(rrcopy, sizeof(*rrcopy), (struct rf_recon_req *)); if (rrcopy == NULL) return(ENOMEM); rrcopy->raidPtr = (void *) raidPtr; rrcopy->row = row; rrcopy->col = column; retcode = RF_CREATE_THREAD(raidPtr->recon_thread, rf_ReconstructInPlaceThread, rrcopy,"raid_reconip"); return (retcode); case RAIDFRAME_GET_INFO: if (!raidPtr->valid) return (ENODEV); ucfgp = (RF_DeviceConfig_t **) data; RF_Malloc(d_cfg, sizeof(RF_DeviceConfig_t), (RF_DeviceConfig_t *)); if (d_cfg == NULL) return (ENOMEM); bzero((char *) d_cfg, sizeof(RF_DeviceConfig_t)); d_cfg->rows = raidPtr->numRow; d_cfg->cols = raidPtr->numCol; d_cfg->ndevs = raidPtr->numRow * raidPtr->numCol; if (d_cfg->ndevs >= RF_MAX_DISKS) { RF_Free(d_cfg, sizeof(RF_DeviceConfig_t)); return (ENOMEM); } d_cfg->nspares = raidPtr->numSpare; if (d_cfg->nspares >= RF_MAX_DISKS) { RF_Free(d_cfg, sizeof(RF_DeviceConfig_t)); return (ENOMEM); } d_cfg->maxqdepth = raidPtr->maxQueueDepth; d = 0; for (i = 0; i < d_cfg->rows; i++) { for (j = 0; j < d_cfg->cols; j++) { d_cfg->devs[d] = raidPtr->Disks[i][j]; d++; } } for (j = d_cfg->cols, i = 0; i < d_cfg->nspares; i++, j++) { d_cfg->spares[i] = raidPtr->Disks[0][j]; } retcode = copyout((caddr_t) d_cfg, (caddr_t) * ucfgp, sizeof(RF_DeviceConfig_t)); RF_Free(d_cfg, sizeof(RF_DeviceConfig_t)); return (retcode); case RAIDFRAME_CHECK_PARITY: *(int *) data = raidPtr->parity_good; return (0); case RAIDFRAME_RESET_ACCTOTALS: bzero(&raidPtr->acc_totals, sizeof(raidPtr->acc_totals)); return (0); case RAIDFRAME_GET_ACCTOTALS: totals = (RF_AccTotals_t *) data; *totals = raidPtr->acc_totals; return (0); case RAIDFRAME_KEEP_ACCTOTALS: raidPtr->keep_acc_totals = *(int *)data; return (0); case RAIDFRAME_GET_SIZE: *(int *) data = raidPtr->totalSectors; return (0); /* fail a disk & optionally start reconstruction */ case RAIDFRAME_FAIL_DISK: rr = (struct rf_recon_req *)data; if (rr->row < 0 || rr->row >= raidPtr->numRow || rr->col < 0 || rr->col >= raidPtr->numCol) return (EINVAL); printf("raid%d: Failing the disk: row: %d col: %d\n", unit, rr->row, rr->col); /* * Make a copy of the recon request so that we don't * rely on the user's buffer */ RF_Malloc(rrcopy, sizeof(*rrcopy), (struct rf_recon_req *)); if (rrcopy == NULL) return(ENOMEM); bcopy(rr, rrcopy, sizeof(*rr)); rrcopy->raidPtr = (void *)raidPtr; retcode = RF_CREATE_THREAD(raidPtr->recon_thread, rf_ReconThread, rrcopy,"raid_recon"); return (0); /* * Invoke a copyback operation after recon on whatever * disk needs it, if any. */ case RAIDFRAME_COPYBACK: if (raidPtr->Layout.map->faultsTolerated == 0) { /* This makes no sense on a RAID 0!! */ return(EINVAL); } if (raidPtr->copyback_in_progress == 1) { /* Copyback is already in progress! */ return(EINVAL); } retcode = RF_CREATE_THREAD(raidPtr->copyback_thread, rf_CopybackThread, raidPtr,"raid_copyback"); return (retcode); /* Return the percentage completion of reconstruction */ case RAIDFRAME_CHECK_RECON_STATUS: if (raidPtr->Layout.map->faultsTolerated == 0) { /* This makes no sense on a RAID 0 */ return(EINVAL); } row = 0; /* XXX we only consider a single row... */ if (raidPtr->status[row] != rf_rs_reconstructing) *(int *)data = 100; else *(int *)data = raidPtr->reconControl[row]->percentComplete; return (0); case RAIDFRAME_CHECK_PARITYREWRITE_STATUS: if (raidPtr->Layout.map->faultsTolerated == 0) { /* This makes no sense on a RAID 0 */ return(EINVAL); } if (raidPtr->parity_rewrite_in_progress == 1) { *(int *) data = 100 * raidPtr->parity_rewrite_stripes_done / raidPtr->Layout.numStripe; } else { *(int *) data = 100; } return (0); case RAIDFRAME_CHECK_COPYBACK_STATUS: if (raidPtr->Layout.map->faultsTolerated == 0) { /* This makes no sense on a RAID 0 */ return(EINVAL); } if (raidPtr->copyback_in_progress == 1) { *(int *) data = 100 * raidPtr->copyback_stripes_done / raidPtr->Layout.numStripe; } else { *(int *) data = 100; } return (0); #if 0 case RAIDFRAME_SPARET_WAIT: /* * The sparetable daemon calls this to wait for the * kernel to need a spare table. * This ioctl does not return until a spare table is needed. * XXX -- Calling mpsleep here in the ioctl code is almost * certainly wrong and evil. -- XXX * XXX -- I should either compute the spare table in the * kernel, or have a different. -- XXX * XXX -- Interface (a different character device) for * delivering the table. -- XXX */ RF_LOCK_MUTEX(rf_sparet_wait_mutex); while (!rf_sparet_wait_queue) mpsleep(&rf_sparet_wait_queue, (PZERO + 1) | PCATCH, "sparet wait", 0, (void *)simple_lock_addr(rf_sparet_wait_mutex), MS_LOCK_SIMPLE); waitreq = rf_sparet_wait_queue; rf_sparet_wait_queue = rf_sparet_wait_queue->next; RF_UNLOCK_MUTEX(rf_sparet_wait_mutex); *((RF_SparetWait_t *)data) = *waitreq; RF_Free(waitreq, sizeof *waitreq); return (0); case RAIDFRAME_ABORT_SPARET_WAIT: /* * Wakes up a process waiting on SPARET_WAIT and puts an * error code in it that will cause the dameon to exit. */ RF_Malloc(waitreq, sizeof (*waitreq), (RF_SparetWait_t *)); waitreq->fcol = -1; RF_LOCK_MUTEX(rf_sparet_wait_mutex); waitreq->next = rf_sparet_wait_queue; rf_sparet_wait_queue = waitreq; RF_UNLOCK_MUTEX(rf_sparet_wait_mutex); wakeup(&rf_sparet_wait_queue); return (0); case RAIDFRAME_SEND_SPARET: /* * Used by the spare table daemon to deliver a spare table * into the kernel */ /* Install the spare table */ retcode = rf_SetSpareTable(raidPtr,*(void **)data); /* * Respond to the requestor. the return status of the * spare table installation is passed in the "fcol" field */ RF_Malloc(waitreq, sizeof *waitreq, (RF_SparetWait_t *)); waitreq->fcol = retcode; RF_LOCK_MUTEX(rf_sparet_wait_mutex); waitreq->next = rf_sparet_resp_queue; rf_sparet_resp_queue = waitreq; wakeup(&rf_sparet_resp_queue); RF_UNLOCK_MUTEX(rf_sparet_wait_mutex); return (retcode); #endif default: /* fall through to the os-specific code below */ break; } if (!raidPtr->valid) return (EINVAL); /* * Add support for "regular" device ioctls here. */ switch (cmd) { case DIOCGDINFO: *(struct disklabel *)data = *(rs->sc_dkdev.dk_label); break; case DIOCGPART: ((struct partinfo *)data)->disklab = rs->sc_dkdev.dk_label; ((struct partinfo *)data)->part = &rs->sc_dkdev.dk_label->d_partitions[DISKPART(dev)]; break; case DIOCWDINFO: case DIOCSDINFO: if ((error = raidlock(rs)) != 0) return (error); rs->sc_flags |= RAIDF_LABELLING; error = setdisklabel(rs->sc_dkdev.dk_label, (struct disklabel *)data, 0, rs->sc_dkdev.dk_cpulabel); if (error == 0) { if (cmd == DIOCWDINFO) error = writedisklabel(RAIDLABELDEV(dev), raidstrategy, rs->sc_dkdev.dk_label, rs->sc_dkdev.dk_cpulabel); } rs->sc_flags &= ~RAIDF_LABELLING; raidunlock(rs); if (error) return (error); break; case DIOCWLABEL: if (*(int *)data != 0) rs->sc_flags |= RAIDF_WLABEL; else rs->sc_flags &= ~RAIDF_WLABEL; break; #if 0 case DIOCGDEFLABEL: raidgetdefaultlabel(raidPtr, rs, (struct disklabel *) data); break; #endif default: retcode = ENOTTY; } return (retcode); } /* * raidinit -- complete the rest of the initialization for the * RAIDframe device. */ int raidinit(dev, raidPtr, unit) dev_t dev; RF_Raid_t *raidPtr; int unit; { int retcode; struct raid_softc *rs; retcode = 0; rs = &raid_softc[unit]; /* XXX should check return code first... */ rs->sc_flags |= RAIDF_INITED; /* XXX doesn't check bounds.*/ sprintf(rs->sc_xname, "raid%d", unit); rs->sc_dkdev.dk_name = rs->sc_xname; /* * disk_attach actually creates space for the CPU disklabel, among * other things, so it's critical to call this *BEFORE* we * try putzing with disklabels. */ disk_attach(&rs->sc_dkdev); /* * XXX There may be a weird interaction here between this, and * protectedSectors, as used in RAIDframe. */ rs->sc_size = raidPtr->totalSectors; rs->sc_dev = dev; return (retcode); } /* * Wake up the daemon & tell it to get us a spare table * XXX * The entries in the queues should be tagged with the raidPtr so that in the * extremely rare case that two recons happen at once, we know for * which device were requesting a spare table. * XXX * * XXX This code is not currently used. GO */ int rf_GetSpareTableFromDaemon(req) RF_SparetWait_t *req; { int retcode; RF_LOCK_MUTEX(rf_sparet_wait_mutex); req->next = rf_sparet_wait_queue; rf_sparet_wait_queue = req; wakeup(&rf_sparet_wait_queue); /* mpsleep unlocks the mutex */ while (!rf_sparet_resp_queue) { tsleep(&rf_sparet_resp_queue, PRIBIO, "raidframe getsparetable", 0); } req = rf_sparet_resp_queue; rf_sparet_resp_queue = req->next; RF_UNLOCK_MUTEX(rf_sparet_wait_mutex); retcode = req->fcol; /* this is not the same req as we alloc'd */ RF_Free(req, sizeof *req); return (retcode); } /* * A wrapper around rf_DoAccess that extracts appropriate info from the * bp & passes it down. * Any calls originating in the kernel must use non-blocking I/O * do some extra sanity checking to return "appropriate" error values for * certain conditions (to make some standard utilities work) * * Formerly known as: rf_DoAccessKernel */ void raidstart(raidPtr) RF_Raid_t *raidPtr; { RF_SectorCount_t num_blocks, pb, sum; RF_RaidAddr_t raid_addr; int retcode; struct partition *pp; daddr_t blocknum; int unit; struct raid_softc *rs; int do_async; struct buf *bp; struct buf *dp; unit = raidPtr->raidid; rs = &raid_softc[unit]; /* Check to see if we're at the limit... */ RF_LOCK_MUTEX(raidPtr->mutex); while (raidPtr->openings > 0) { RF_UNLOCK_MUTEX(raidPtr->mutex); /* get the next item, if any, from the queue */ dp = &rs->buf_queue; bp = dp->b_actf; if (bp == NULL) { /* nothing more to do */ return; } /* update structures */ dp = bp->b_actf; if (dp != NULL) { dp->b_actb = bp->b_actb; } else { rs->buf_queue.b_actb = bp->b_actb; } *bp->b_actb = dp; /* Ok, for the bp we have here, bp->b_blkno is relative to the * partition.. Need to make it absolute to the underlying * device.. */ blocknum = bp->b_blkno; if (DISKPART(bp->b_dev) != RAW_PART) { pp = &rs->sc_dkdev.dk_label->d_partitions[DISKPART(bp->b_dev)]; blocknum += pp->p_offset; } db1_printf(("Blocks: %d, %d\n", (int) bp->b_blkno, (int) blocknum)); db1_printf(("bp->b_bcount = %d\n", (int) bp->b_bcount)); db1_printf(("bp->b_resid = %d\n", (int) bp->b_resid)); /* *THIS* is where we adjust what block we're going to... * but DO NOT TOUCH bp->b_blkno!!! */ raid_addr = blocknum; num_blocks = bp->b_bcount >> raidPtr->logBytesPerSector; pb = (bp->b_bcount & raidPtr->sectorMask) ? 1 : 0; sum = raid_addr + num_blocks + pb; if (1 || rf_debugKernelAccess) { db1_printf(("raid_addr=%d sum=%d num_blocks=%d(+%d) (%d)\n", (int) raid_addr, (int) sum, (int) num_blocks, (int) pb, (int) bp->b_resid)); } if ((sum > raidPtr->totalSectors) || (sum < raid_addr) || (sum < num_blocks) || (sum < pb)) { bp->b_error = ENOSPC; bp->b_flags |= B_ERROR; bp->b_resid = bp->b_bcount; biodone(bp); RF_LOCK_MUTEX(raidPtr->mutex); continue; } /* * XXX rf_DoAccess() should do this, not just DoAccessKernel() */ if (bp->b_bcount & raidPtr->sectorMask) { bp->b_error = EINVAL; bp->b_flags |= B_ERROR; bp->b_resid = bp->b_bcount; biodone(bp); RF_LOCK_MUTEX(raidPtr->mutex); continue; } db1_printf(("Calling DoAccess..\n")); RF_LOCK_MUTEX(raidPtr->mutex); raidPtr->openings--; RF_UNLOCK_MUTEX(raidPtr->mutex); /* * Everything is async. */ do_async = 1; /* don't ever condition on bp->b_flags & B_WRITE. * always condition on B_READ instead */ /* XXX we're still at splbio() here... do we *really* need to be? */ retcode = rf_DoAccess(raidPtr, (bp->b_flags & B_READ) ? RF_IO_TYPE_READ : RF_IO_TYPE_WRITE, do_async, raid_addr, num_blocks, bp->b_un.b_addr, bp, NULL, NULL, RF_DAG_NONBLOCKING_IO, NULL, NULL, NULL); RF_LOCK_MUTEX(raidPtr->mutex); } RF_UNLOCK_MUTEX(raidPtr->mutex); } /* Invoke an I/O from kernel mode. Disk queue should be locked upon entry */ int rf_DispatchKernelIO(queue, req) RF_DiskQueue_t *queue; RF_DiskQueueData_t *req; { int op = (req->type == RF_IO_TYPE_READ) ? B_READ : B_WRITE; struct buf *bp; struct raidbuf *raidbp = NULL; struct raid_softc *rs; int unit; int s; s=0; /* s = splbio();*/ /* want to test this */ /* * XXX along with the vnode, we also need the softc associated with * this device.. */ req->queue = queue; unit = queue->raidPtr->raidid; db1_printf(("DispatchKernelIO unit: %d\n", unit)); if (unit >= numraid) { printf("Invalid unit number: %d %d\n", unit, numraid); panic("Invalid Unit number in rf_DispatchKernelIO\n"); } rs = &raid_softc[unit]; /* XXX is this the right place? */ disk_busy(&rs->sc_dkdev); bp = req->bp; #if 1 /* * XXX When there is a physical disk failure, someone is passing * us a buffer that contains old stuff!! Attempt to deal with * this problem without taking a performance hit... * (not sure where the real bug is. It's buried in RAIDframe * somewhere) :-( GO ) */ if (bp->b_flags & B_ERROR) { bp->b_flags &= ~B_ERROR; } if (bp->b_error!=0) { bp->b_error = 0; } #endif raidbp = RAIDGETBUF(); raidbp->rf_flags = 0; /* XXX not really used anywhere... */ /* * context for raidiodone */ raidbp->rf_obp = bp; raidbp->req = req; LIST_INIT(&raidbp->rf_buf.b_dep); switch (req->type) { case RF_IO_TYPE_NOP: /* Used primarily to unlock a locked queue. */ db1_printf(("rf_DispatchKernelIO: NOP to r %d c %d\n", queue->row, queue->col)); /* XXX need to do something extra here.. */ /* * I'm leaving this in, as I've never actually seen it * used, and I'd like folks to report it... GO */ printf(("WAKEUP CALLED\n")); queue->numOutstanding++; /* XXX need to glue the original buffer into this?? */ rf_KernelWakeupFunc(&raidbp->rf_buf); break; case RF_IO_TYPE_READ: case RF_IO_TYPE_WRITE: if (req->tracerec) { RF_ETIMER_START(req->tracerec->timer); } rf_InitBP(&raidbp->rf_buf, queue->rf_cinfo->ci_vp, op | bp->b_flags, queue->rf_cinfo->ci_dev, req->sectorOffset, req->numSector, req->buf, rf_KernelWakeupFunc, (void *)req, queue->raidPtr->logBytesPerSector, req->b_proc); if (rf_debugKernelAccess) { db1_printf(("dispatch: bp->b_blkno = %ld\n", (long)bp->b_blkno)); } queue->numOutstanding++; queue->last_deq_sector = req->sectorOffset; /* * Acc wouldn't have been let in if there were any * pending reqs at any other priority. */ queue->curPriority = req->priority; db1_printf(("Going for %c to unit %d row %d col %d\n", req->type, unit, queue->row, queue->col)); db1_printf(("sector %d count %d (%d bytes) %d\n", (int)req->sectorOffset, (int)req->numSector, (int)(req->numSector << queue->raidPtr->logBytesPerSector), (int)queue->raidPtr->logBytesPerSector)); if ((raidbp->rf_buf.b_flags & B_READ) == 0) { raidbp->rf_buf.b_vp->v_numoutput++; } VOP_STRATEGY(&raidbp->rf_buf); break; default: panic("bad req->type in rf_DispatchKernelIO"); } db1_printf(("Exiting from DispatchKernelIO\n")); /* splx(s); */ /* want to test this */ return (0); } /* * This is the callback function associated with a I/O invoked from * kernel code. */ void rf_KernelWakeupFunc(vbp) struct buf *vbp; { RF_DiskQueueData_t *req = NULL; RF_DiskQueue_t *queue; struct raidbuf *raidbp = (struct raidbuf *)vbp; struct buf *bp; struct raid_softc *rs; int unit; int s; s = splbio(); db1_printf(("recovering the request queue:\n")); req = raidbp->req; bp = raidbp->rf_obp; queue = (RF_DiskQueue_t *)req->queue; if (raidbp->rf_buf.b_flags & B_ERROR) { bp->b_flags |= B_ERROR; bp->b_error = raidbp->rf_buf.b_error ? raidbp->rf_buf.b_error : EIO; } #if 1 /* XXX Methinks this could be wrong... */ bp->b_resid = raidbp->rf_buf.b_resid; #endif if (req->tracerec) { RF_ETIMER_STOP(req->tracerec->timer); RF_ETIMER_EVAL(req->tracerec->timer); RF_LOCK_MUTEX(rf_tracing_mutex); req->tracerec->diskwait_us += RF_ETIMER_VAL_US(req->tracerec->timer); req->tracerec->phys_io_us += RF_ETIMER_VAL_US(req->tracerec->timer); req->tracerec->num_phys_ios++; RF_UNLOCK_MUTEX(rf_tracing_mutex); } bp->b_bcount = raidbp->rf_buf.b_bcount;/* XXXX ?? */ unit = queue->raidPtr->raidid; /* *Much* simpler :-> */ /* * XXX Ok, let's get aggressive... If B_ERROR is set, let's go * ballistic, and mark the component as hosed... */ if (bp->b_flags & B_ERROR) { /* Mark the disk as dead but only mark it once... */ if (queue->raidPtr->Disks[queue->row][queue->col].status == rf_ds_optimal) { printf("raid%d: IO Error. Marking %s as failed.\n", unit, queue->raidPtr-> Disks[queue->row][queue->col].devname); queue->raidPtr->Disks[queue->row][queue->col].status = rf_ds_failed; queue->raidPtr->status[queue->row] = rf_rs_degraded; queue->raidPtr->numFailures++; /* XXX here we should bump the version number for each component, and write that data out */ } else { /* Disk is already dead... */ /* printf("Disk already marked as dead!\n"); */ } } rs = &raid_softc[unit]; RAIDPUTBUF(raidbp); if (bp->b_resid==0) { /* XXX is this the right place for a disk_unbusy()??!??!?!? */ disk_unbusy(&rs->sc_dkdev, (bp->b_bcount - bp->b_resid)); } rf_DiskIOComplete(queue, req, (bp->b_flags & B_ERROR) ? 1 : 0); (req->CompleteFunc)(req->argument, (bp->b_flags & B_ERROR) ? 1 : 0); splx(s); } /* * Initialize a buf structure for doing an I/O in the kernel. */ void rf_InitBP(bp, b_vp, rw_flag, dev, startSect, numSect, buf, cbFunc, cbArg, logBytesPerSector, b_proc) struct buf *bp; struct vnode *b_vp; unsigned rw_flag; dev_t dev; RF_SectorNum_t startSect; RF_SectorCount_t numSect; caddr_t buf; void (*cbFunc)(struct buf *); void *cbArg; int logBytesPerSector; struct proc *b_proc; { /* bp->b_flags = B_PHYS | rw_flag; */ bp->b_flags = B_CALL | rw_flag; /* XXX need B_PHYS here too??? */ bp->b_bcount = numSect << logBytesPerSector; bp->b_bufsize = bp->b_bcount; bp->b_error = 0; bp->b_dev = dev; bp->b_un.b_addr = buf; bp->b_blkno = startSect; bp->b_resid = bp->b_bcount; /* XXX is this right!??!?!! */ if (bp->b_bcount == 0) { panic("bp->b_bcount is zero in rf_InitBP!!\n"); } bp->b_proc = b_proc; bp->b_iodone = cbFunc; bp->b_vp = b_vp; LIST_INIT(&bp->b_dep); } void raidgetdefaultlabel(raidPtr, rs, lp) RF_Raid_t *raidPtr; struct raid_softc *rs; struct disklabel *lp; { db1_printf(("Building a default label...\n")); bzero(lp, sizeof(*lp)); /* fabricate a label... */ lp->d_secperunit = raidPtr->totalSectors; lp->d_secsize = raidPtr->bytesPerSector; lp->d_nsectors = raidPtr->Layout.dataSectorsPerStripe; lp->d_ntracks = 1; lp->d_ncylinders = raidPtr->totalSectors / (lp->d_nsectors * lp->d_ntracks); lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors; strncpy(lp->d_typename, "raid", sizeof(lp->d_typename)); lp->d_type = DTYPE_RAID; strncpy(lp->d_packname, "fictitious", sizeof(lp->d_packname)); lp->d_rpm = 3600; lp->d_interleave = 1; lp->d_flags = 0; lp->d_partitions[RAW_PART].p_offset = 0; lp->d_partitions[RAW_PART].p_size = raidPtr->totalSectors; lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED; lp->d_npartitions = RAW_PART + 1; lp->d_magic = DISKMAGIC; lp->d_magic2 = DISKMAGIC; lp->d_checksum = dkcksum(rs->sc_dkdev.dk_label); } /* * Read the disklabel from the raid device. If one is not present, fake one * up. */ void raidgetdisklabel(dev) dev_t dev; { int unit = raidunit(dev); struct raid_softc *rs = &raid_softc[unit]; char *errstring; struct disklabel *lp = rs->sc_dkdev.dk_label; struct cpu_disklabel *clp = rs->sc_dkdev.dk_cpulabel; RF_Raid_t *raidPtr; db1_printf(("Getting the disklabel...\n")); bzero(clp, sizeof(*clp)); raidPtr = raidPtrs[unit]; raidgetdefaultlabel(raidPtr, rs, lp); /* * Call the generic disklabel extraction routine. */ errstring = readdisklabel(RAIDLABELDEV(dev), raidstrategy, rs->sc_dkdev.dk_label, rs->sc_dkdev.dk_cpulabel, 0); if (errstring) raidmakedisklabel(rs); else { int i; struct partition *pp; /* * Sanity check whether the found disklabel is valid. * * This is necessary since total size of the raid device * may vary when an interleave is changed even though exactly * same componets are used, and old disklabel may used * if that is found. */ if (lp->d_secperunit != rs->sc_size) printf("WARNING: %s: " "total sector size in disklabel (%d) != " "the size of raid (%ld)\n", rs->sc_xname, lp->d_secperunit, (long) rs->sc_size); for (i = 0; i < lp->d_npartitions; i++) { pp = &lp->d_partitions[i]; if (pp->p_offset + pp->p_size > rs->sc_size) printf("WARNING: %s: end of partition `%c' " "exceeds the size of raid (%ld)\n", rs->sc_xname, 'a' + i, (long) rs->sc_size); } } } /* * Take care of things one might want to take care of in the event * that a disklabel isn't present. */ void raidmakedisklabel(rs) struct raid_softc *rs; { struct disklabel *lp = rs->sc_dkdev.dk_label; db1_printf(("Making a label..\n")); /* * For historical reasons, if there's no disklabel present * the raw partition must be marked FS_BSDFFS. */ lp->d_partitions[RAW_PART].p_fstype = FS_BSDFFS; strncpy(lp->d_packname, "default label", sizeof(lp->d_packname)); lp->d_checksum = dkcksum(lp); } /* * Lookup the provided name in the filesystem. If the file exists, * is a valid block device, and isn't being used by anyone else, * set *vpp to the file's vnode. * You'll find the original of this in ccd.c */ int raidlookup(path, p, vpp) char *path; struct proc *p; struct vnode **vpp; /* result */ { struct nameidata nd; struct vnode *vp; struct vattr va; int error; NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, path, p); if ((error = vn_open(&nd, FREAD|FWRITE, 0)) != 0) { #ifdef DEBUG printf("RAIDframe: vn_open returned %d\n", error); #endif return (error); } vp = nd.ni_vp; if (vp->v_usecount > 1) { VOP_UNLOCK(vp, 0, p); (void)vn_close(vp, FREAD|FWRITE, p->p_ucred, p); return (EBUSY); } if ((error = VOP_GETATTR(vp, &va, p->p_ucred, p)) != 0) { VOP_UNLOCK(vp, 0, p); (void)vn_close(vp, FREAD|FWRITE, p->p_ucred, p); return (error); } /* XXX: eventually we should handle VREG, too. */ if (va.va_type != VBLK) { VOP_UNLOCK(vp, 0, p); (void)vn_close(vp, FREAD|FWRITE, p->p_ucred, p); return (ENOTBLK); } VOP_UNLOCK(vp, 0, p); *vpp = vp; return (0); } /* * Wait interruptibly for an exclusive lock. * * XXX * Several drivers do this; it should be abstracted and made MP-safe. * (Hmm... where have we seen this warning before :-> GO ) */ int raidlock(rs) struct raid_softc *rs; { int error; while ((rs->sc_flags & RAIDF_LOCKED) != 0) { rs->sc_flags |= RAIDF_WANTED; if ((error = tsleep(rs, PRIBIO | PCATCH, "raidlck", 0)) != 0) return (error); } rs->sc_flags |= RAIDF_LOCKED; return (0); } /* * Unlock and wake up any waiters. */ void raidunlock(rs) struct raid_softc *rs; { rs->sc_flags &= ~RAIDF_LOCKED; if ((rs->sc_flags & RAIDF_WANTED) != 0) { rs->sc_flags &= ~RAIDF_WANTED; wakeup(rs); } } #define RF_COMPONENT_INFO_OFFSET 16384 /* bytes */ #define RF_COMPONENT_INFO_SIZE 1024 /* bytes */ int raidmarkclean(dev_t dev, struct vnode *b_vp, int mod_counter) { RF_ComponentLabel_t component_label; raidread_component_label(dev, b_vp, &component_label); component_label.mod_counter = mod_counter; component_label.clean = RF_RAID_CLEAN; raidwrite_component_label(dev, b_vp, &component_label); return(0); } int raidmarkdirty(dev_t dev, struct vnode *b_vp, int mod_counter) { RF_ComponentLabel_t component_label; raidread_component_label(dev, b_vp, &component_label); component_label.mod_counter = mod_counter; component_label.clean = RF_RAID_DIRTY; raidwrite_component_label(dev, b_vp, &component_label); return(0); } /* ARGSUSED */ int raidread_component_label(dev, b_vp, component_label) dev_t dev; struct vnode *b_vp; RF_ComponentLabel_t *component_label; { struct buf *bp; int error; /* XXX should probably ensure that we don't try to do this if someone has changed rf_protected_sectors. */ /* get a block of the appropriate size... */ bp = geteblk((int)RF_COMPONENT_INFO_SIZE); bp->b_dev = dev; /* get our ducks in a row for the read */ bp->b_blkno = RF_COMPONENT_INFO_OFFSET / DEV_BSIZE; bp->b_bcount = RF_COMPONENT_INFO_SIZE; bp->b_flags = B_BUSY | B_READ; bp->b_resid = RF_COMPONENT_INFO_SIZE / DEV_BSIZE; (*bdevsw[major(bp->b_dev)].d_strategy)(bp); error = biowait(bp); if (!error) { memcpy(component_label, bp->b_un.b_addr, sizeof(RF_ComponentLabel_t)); #if 0 printf("raidread_component_label: got component label:\n"); printf("Version: %d\n",component_label->version); printf("Serial Number: %d\n",component_label->serial_number); printf("Mod counter: %d\n",component_label->mod_counter); printf("Row: %d\n", component_label->row); printf("Column: %d\n", component_label->column); printf("Num Rows: %d\n", component_label->num_rows); printf("Num Columns: %d\n", component_label->num_columns); printf("Clean: %d\n", component_label->clean); printf("Status: %d\n", component_label->status); #endif } else { printf("Failed to read RAID component label!\n"); } bp->b_flags = B_INVAL | B_AGE; brelse(bp); return(error); } /* ARGSUSED */ int raidwrite_component_label(dev, b_vp, component_label) dev_t dev; struct vnode *b_vp; RF_ComponentLabel_t *component_label; { struct buf *bp; int error; /* get a block of the appropriate size... */ bp = geteblk((int)RF_COMPONENT_INFO_SIZE); bp->b_dev = dev; /* get our ducks in a row for the write */ bp->b_blkno = RF_COMPONENT_INFO_OFFSET / DEV_BSIZE; bp->b_bcount = RF_COMPONENT_INFO_SIZE; bp->b_flags = B_BUSY | B_WRITE; bp->b_resid = RF_COMPONENT_INFO_SIZE / DEV_BSIZE; memset( bp->b_un.b_addr, 0, RF_COMPONENT_INFO_SIZE ); memcpy( bp->b_un.b_addr, component_label, sizeof(RF_ComponentLabel_t)); (*bdevsw[major(bp->b_dev)].d_strategy)(bp); error = biowait(bp); bp->b_flags = B_INVAL | B_AGE; brelse(bp); if (error) { printf("Failed to write RAID component info!\n"); } return(error); } void rf_markalldirty( raidPtr ) RF_Raid_t *raidPtr; { RF_ComponentLabel_t c_label; int r,c; raidPtr->mod_counter++; for (r = 0; r < raidPtr->numRow; r++) { for (c = 0; c < raidPtr->numCol; c++) { if (raidPtr->Disks[r][c].status != rf_ds_failed) { raidread_component_label( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, &c_label); if (c_label.status == rf_ds_spared) { /* XXX do something special... but whatever you do, don't try to access it!! */ } else { #if 0 c_label.status = raidPtr->Disks[r][c].status; raidwrite_component_label( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, &c_label); #endif raidmarkdirty( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, raidPtr->mod_counter); } } } } /* printf("Component labels marked dirty.\n"); */ #if 0 for( c = 0; c < raidPtr->numSpare ; c++) { sparecol = raidPtr->numCol + c; if (raidPtr->Disks[r][sparecol].status == rf_ds_used_spare) { /* XXX this is where we get fancy and map this spare into it's correct spot in the array. */ /* we claim this disk is "optimal" if it's rf_ds_used_spare, as that means it should be directly substitutable for the disk it replaced. We note that too... */ for(i=0;inumRow;i++) { for(j=0;jnumCol;j++) { if ((raidPtr->Disks[i][j].spareRow == r) && (raidPtr->Disks[i][j].spareCol == sparecol)) { srow = r; scol = sparecol; break; } } } raidread_component_label( raidPtr->Disks[r][sparecol].dev, raidPtr->raid_cinfo[r][sparecol].ci_vp, &c_label); /* make sure status is noted */ c_label.version = RF_COMPONENT_LABEL_VERSION; c_label.mod_counter = raidPtr->mod_counter; c_label.serial_number = raidPtr->serial_number; c_label.row = srow; c_label.column = scol; c_label.num_rows = raidPtr->numRow; c_label.num_columns = raidPtr->numCol; c_label.clean = RF_RAID_DIRTY; /* changed in a bit*/ c_label.status = rf_ds_optimal; raidwrite_component_label( raidPtr->Disks[r][sparecol].dev, raidPtr->raid_cinfo[r][sparecol].ci_vp, &c_label); raidmarkclean( raidPtr->Disks[r][sparecol].dev, raidPtr->raid_cinfo[r][sparecol].ci_vp); } } #endif } void rf_update_component_labels( raidPtr ) RF_Raid_t *raidPtr; { RF_ComponentLabel_t c_label; int sparecol; int r,c; int i,j; int srow, scol; srow = -1; scol = -1; /* XXX should do extra checks to make sure things really are clean, rather than blindly setting the clean bit... */ raidPtr->mod_counter++; for (r = 0; r < raidPtr->numRow; r++) { for (c = 0; c < raidPtr->numCol; c++) { if (raidPtr->Disks[r][c].status == rf_ds_optimal) { raidread_component_label( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, &c_label); /* make sure status is noted */ c_label.status = rf_ds_optimal; raidwrite_component_label( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, &c_label); if (raidPtr->parity_good == RF_RAID_CLEAN) { raidmarkclean( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, raidPtr->mod_counter); } } /* else we don't touch it.. */ #if 0 else if (raidPtr->Disks[r][c].status != rf_ds_failed) { raidread_component_label( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, &c_label); /* make sure status is noted */ c_label.status = raidPtr->Disks[r][c].status; raidwrite_component_label( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, &c_label); if (raidPtr->parity_good == RF_RAID_CLEAN) { raidmarkclean( raidPtr->Disks[r][c].dev, raidPtr->raid_cinfo[r][c].ci_vp, raidPtr->mod_counter); } } #endif } } for( c = 0; c < raidPtr->numSpare ; c++) { sparecol = raidPtr->numCol + c; if (raidPtr->Disks[0][sparecol].status == rf_ds_used_spare) { /* we claim this disk is "optimal" if it's rf_ds_used_spare, as that means it should be directly substitutable for the disk it replaced. We note that too... */ for(i=0;inumRow;i++) { for(j=0;jnumCol;j++) { if ((raidPtr->Disks[i][j].spareRow == 0) && (raidPtr->Disks[i][j].spareCol == sparecol)) { srow = i; scol = j; break; } } } raidread_component_label( raidPtr->Disks[0][sparecol].dev, raidPtr->raid_cinfo[0][sparecol].ci_vp, &c_label); /* make sure status is noted */ c_label.version = RF_COMPONENT_LABEL_VERSION; c_label.mod_counter = raidPtr->mod_counter; c_label.serial_number = raidPtr->serial_number; c_label.row = srow; c_label.column = scol; c_label.num_rows = raidPtr->numRow; c_label.num_columns = raidPtr->numCol; c_label.clean = RF_RAID_DIRTY; /* changed in a bit*/ c_label.status = rf_ds_optimal; raidwrite_component_label( raidPtr->Disks[0][sparecol].dev, raidPtr->raid_cinfo[0][sparecol].ci_vp, &c_label); if (raidPtr->parity_good == RF_RAID_CLEAN) { raidmarkclean( raidPtr->Disks[0][sparecol].dev, raidPtr->raid_cinfo[0][sparecol].ci_vp, raidPtr->mod_counter); } } } /* printf("Component labels updated\n"); */ } void rf_ReconThread(req) struct rf_recon_req *req; { int s; RF_Raid_t *raidPtr; s = splbio(); raidPtr = (RF_Raid_t *) req->raidPtr; raidPtr->recon_in_progress = 1; rf_FailDisk((RF_Raid_t *) req->raidPtr, req->row, req->col, ((req->flags & RF_FDFLAGS_RECON) ? 1 : 0)); /* XXX get rid of this! we don't need it at all.. */ RF_Free(req, sizeof(*req)); raidPtr->recon_in_progress = 0; splx(s); /* That's all... */ kthread_exit(0); /* does not return */ } void rf_RewriteParityThread(raidPtr) RF_Raid_t *raidPtr; { int retcode; int s; raidPtr->parity_rewrite_in_progress = 1; s = splbio(); retcode = rf_RewriteParity(raidPtr); splx(s); if (retcode) { printf("raid%d: Error re-writing parity!\n",raidPtr->raidid); } else { /* set the clean bit! If we shutdown correctly, the clean bit on each component label will get set */ raidPtr->parity_good = RF_RAID_CLEAN; } raidPtr->parity_rewrite_in_progress = 0; /* That's all... */ kthread_exit(0); /* does not return */ } void rf_CopybackThread(raidPtr) RF_Raid_t *raidPtr; { int s; raidPtr->copyback_in_progress = 1; s = splbio(); rf_CopybackReconstructedData(raidPtr); splx(s); raidPtr->copyback_in_progress = 0; /* That's all... */ kthread_exit(0); /* does not return */ } void rf_ReconstructInPlaceThread(req) struct rf_recon_req *req; { int retcode; int s; RF_Raid_t *raidPtr; s = splbio(); raidPtr = req->raidPtr; raidPtr->recon_in_progress = 1; retcode = rf_ReconstructInPlace(raidPtr, req->row, req->col); RF_Free(req, sizeof(*req)); raidPtr->recon_in_progress = 0; splx(s); /* That's all... */ kthread_exit(0); /* does not return */ }