/* $NetBSD: rf_netbsdkintf.c,v 1.5 1998/12/22 20:03:14 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 * ***********************************************************/ /* * : * Log: rf_kintf.c,v * Revision 1.57 1996/07/19 16:12:20 jimz * remove addition of protectedSectors in InitBP- it's already * done in the diskqueue code * * Revision 1.56 1996/07/17 21:00:58 jimz * clean up timer interface, tracing * * Revision 1.55 1996/06/17 03:00:54 jimz * Change RAIDFRAME_GET_INFO interface to do its own copyout() * (because size of device config structure now exceeds 8k) * * Revision 1.54 1996/06/09 02:36:46 jimz * lots of little crufty cleanup- fixup whitespace * issues, comment #ifdefs, improve typing in some * places (esp size-related) * * Revision 1.53 1996/06/07 21:33:04 jimz * begin using consistent types for sector numbers, * stripe numbers, row+col numbers, recon unit numbers * * Revision 1.52 1996/06/06 17:28:08 jimz * track sector number of last I/O dequeued * * Revision 1.51 1996/06/05 18:06:02 jimz * Major code cleanup. The Great Renaming is now done. * Better modularity. Better typing. Fixed a bunch of * synchronization bugs. Made a lot of global stuff * per-desc or per-array. Removed dead code. * * Revision 1.50 1996/06/03 23:28:26 jimz * more bugfixes * check in tree to sync for IPDS runs with current bugfixes * there still may be a problem with threads in the script test * getting I/Os stuck- not trivially reproducible (runs ~50 times * in a row without getting stuck) * * Revision 1.49 1996/06/02 17:31:48 jimz * Moved a lot of global stuff into array structure, where it belongs. * Fixed up paritylogging, pss modules in this manner. Some general * code cleanup. Removed lots of dead code, some dead files. * * Revision 1.48 1996/05/31 22:26:54 jimz * fix a lot of mapping problems, memory allocation problems * found some weird lock issues, fixed 'em * more code cleanup * * Revision 1.47 1996/05/30 12:59:18 jimz * make etimer happier, more portable * * Revision 1.46 1996/05/30 11:29:41 jimz * Numerous bug fixes. Stripe lock release code disagreed with the taking code * about when stripes should be locked (I made it consistent: no parity, no lock) * There was a lot of extra serialization of I/Os which I've removed- a lot of * it was to calculate values for the cache code, which is no longer with us. * More types, function, macro cleanup. Added code to properly quiesce the array * on shutdown. Made a lot of stuff array-specific which was (bogusly) general * before. Fixed memory allocation, freeing bugs. * * Revision 1.45 1996/05/27 18:56:37 jimz * more code cleanup * better typing * compiles in all 3 environments * * Revision 1.44 1996/05/24 22:17:04 jimz * continue code + namespace cleanup * typed a bunch of flags * * Revision 1.43 1996/05/24 01:59:45 jimz * another checkpoint in code cleanup for release * time to sync kernel tree * * Revision 1.42 1996/05/23 22:17:54 jimz * fix sector size hardcoding problems * * Revision 1.41 1996/05/23 21:46:35 jimz * checkpoint in code cleanup (release prep) * lots of types, function names have been fixed * * Revision 1.40 1996/05/23 13:18:07 jimz * tracing_mutex -> rf_tracing_mutex * * Revision 1.39 1996/05/23 00:33:23 jimz * code cleanup: move all debug decls to rf_options.c, all extern * debug decls to rf_options.h, all debug vars preceded by rf_ * * Revision 1.38 1996/05/20 16:15:32 jimz * switch to rf_{mutex,cond}_{init,destroy} * * Revision 1.37 1996/05/10 16:23:47 jimz * RF_offset -> RF_Offset * * Revision 1.36 1996/05/08 21:01:24 jimz * fixed up enum type names that were conflicting with other * enums and function names (ie, "panic") * future naming trends will be towards RF_ and rf_ for * everything raidframe-related * * Revision 1.35 1996/05/03 19:10:48 jimz * change sanity checking for bogus I/Os to return more appropriate * values (to make some user-level utilities happer with RAIDframe) * * Revision 1.34 1996/05/02 22:17:00 jimz * When using DKUSAGE, send a bogus IO after configuring to let DKUSAGE know * that we exist. This will let user-level programs doing group stats on the * RF device function without error before RF gets its first IO * * Changed rf_device_config devs and spares fields to RF_RaidDisk_t * * Inc numOutstanding for the disk queue in rf_DispatchKernelIO if * type is IO_TYPE_NOP. I'm not sure this is right, but it seems to be, * because the disk IO completion routine wants to dec it, and doesn't * care if there was no such IO. * * Revision 1.33 1996/05/02 15:05:44 jimz * for now, rf_DoAccessKernel will reject non-sector-sized I/Os * eventually, it should do something more clever... * (and do it in DoAccess(), not just DoAccessKernel()) * * Revision 1.32 1996/05/01 16:28:39 jimz * get rid of uses of ccmn_ functions * * Revision 1.31 1996/05/01 15:42:17 jimz * ccmn_* memory management is on the way out. This is an archival checkpoint- * both the old and new code are in place (all the ccmn_ calls are #if 0). After * this, the ccmn_ code will no longer appear. * * Revision 1.30 1996/04/22 15:53:13 jimz * MAX_RAIDS -> NRAIDFRAME * * Revision 1.29 1995/12/12 18:10:06 jimz * MIN -> RF_MIN, MAX -> RF_MAX, ASSERT -> RF_ASSERT * fix 80-column brain damage in comments * * Revision 1.28 1995/12/01 19:11:01 root * added copyright info * * Revision 1.27 1995/11/28 18:56:40 wvcii * disabled buffer copy in rf_write * * Revision 1.26 1995/10/06 16:37:08 jimz * get struct bufs from ubc, not cam * copy all write data, and operate on copy * (temporary hack to get around dags in PQ that want * to Xor into user write buffers) * * Revision 1.25 1995/09/30 22:23:08 jimz * do not require raid to be active to perform ACCTOTAL ioctl * * Revision 1.24 1995/09/30 20:39:08 jimz * added new ioctls: * RAIDFRAME_RESET_ACCTOTALS * RAIDFRAME_GET_ACCTOTALS * RAIDFRAME_KEEP_ACCTOTALS * * Revision 1.23 1995/09/20 21:11:59 jimz * include dfstrace.h in KERNEL block * (even though it's a kernel-only file, this makes the depend process * at user-level happy. Why the user-level Makefile wants to depend * kintf.c is less clear, but this is a workaround). * * Revision 1.22 1995/09/19 23:19:03 jimz * added DKUSAGE support * */ #ifdef _KERNEL #define KERNEL #endif #ifdef KERNEL #include #ifdef __NetBSD__ #include "raid.h" #include #include #include #include #include #include #include #include #include #include #include #endif #include #include #include #include #include #ifdef __NetBSD__ #include #endif /* __NetBSD__ */ #include #include #include "rf_raid.h" #include "rf_raidframe.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; #define RFK_BOOT_NONE 0 #define RFK_BOOT_GOOD 1 #define RFK_BOOT_BAD 2 static int rf_kbooted = RFK_BOOT_NONE; #ifdef DEBUG #define db0_printf(a) printf a #define db_printf(a) if (rf_kdebug_level > 0) printf a #define db1_printf(a) if (rf_kdebug_level > 0) printf a #define db2_printf(a) if (rf_kdebug_level > 1) printf a #define db3_printf(a) if (rf_kdebug_level > 2) printf a #define db4_printf(a) if (rf_kdebug_level > 3) printf a #define db5_printf(a) if (rf_kdebug_level > 4) printf a #else /* DEBUG */ #define db0_printf(a) printf a #define db1_printf(a) { } #define db2_printf(a) { } #define db3_printf(a) { } #define db4_printf(a) { } #define db5_printf(a) { } #endif /* DEBUG */ static RF_Raid_t **raidPtrs; /* global raid device descriptors */ static int rf_pending_testaccs; RF_DECLARE_STATIC_MUTEX(rf_sparet_wait_mutex) RF_DECLARE_STATIC_MUTEX(rf_async_done_q_mutex) static RF_SparetWait_t *rf_sparet_wait_queue; /* requests to install a spare table */ static RF_SparetWait_t *rf_sparet_resp_queue; /* responses from installation process */ static struct rf_test_acc *rf_async_done_qh, *rf_async_done_qt; static struct rf_recon_req *recon_queue = NULL; /* used to communicate reconstruction requests */ decl_simple_lock_data(,recon_queue_mutex) #define LOCK_RECON_Q_MUTEX() simple_lock(&recon_queue_mutex) #define UNLOCK_RECON_Q_MUTEX() simple_unlock(&recon_queue_mutex) /* prototypes */ static void KernelWakeupFunc(struct buf *bp); static void InitBP(struct buf *bp, struct vnode *, 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); #define Dprintf0(s) if (rf_queueDebug) rf_debug_printf(s,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL) #define Dprintf1(s,a) if (rf_queueDebug) rf_debug_printf(s,a,NULL,NULL,NULL,NULL,NULL,NULL,NULL) #define Dprintf2(s,a,b) if (rf_queueDebug) rf_debug_printf(s,a,b,NULL,NULL,NULL,NULL,NULL,NULL) #define Dprintf3(s,a,b,c) if (rf_queueDebug) rf_debug_printf(s,a,b,c,NULL,NULL,NULL,NULL,NULL) /* this is so that we can compile under 2.0 as well as 3.2 */ #ifndef proc_to_task #define proc_to_task(x) ((x)->task) #endif /* !proc_to_task */ void raidattach __P((int)); int raidsize __P((dev_t)); void rf_DiskIOComplete(RF_DiskQueue_t *, RF_DiskQueueData_t *, int); void rf_CopybackReconstructedData(RF_Raid_t *raidPtr); static int raidinit __P((dev_t,RF_Raid_t *,int)); 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(rs) pool_get(&(rs)->sc_cbufpool, PR_NOWAIT) #define RAIDPUTBUF(rs, cbp) pool_put(&(rs)->sc_cbufpool, cbp) /* 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_unit; /* logical unit number */ 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 pool sc_cbufpool; /* component buffer pool */ }; /* 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; #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; static void raidgetdefaultlabel __P((RF_Raid_t *, struct raid_softc *, struct disklabel *)); static void raidgetdisklabel __P((dev_t)); static void raidmakedisklabel __P((struct raid_softc *)); static int raidlock __P((struct raid_softc *)); static void raidunlock __P((struct raid_softc *)); int raidlookup __P((char *, struct proc *p, struct vnode **)); void raidattach(num) int num; { int raidID; #ifdef DEBUG printf("raidattach: Asked for %d units\n",num); #endif 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"); } rf_kbooted = rf_boot(); if (rf_kbooted) { panic("Serious error booting RAID!!\n"); } rf_kbooted = RFK_BOOT_GOOD; /* 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_DEVBUF, 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++) { RF_Calloc(raidPtrs[raidID], 1, sizeof(RF_Raid_t), (RF_Raid_t *)); if (raidPtrs[raidID]==NULL) { printf("raidPtrs[%d] is NULL\n",raidID); } } } 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; unsigned int raidID; int rc; int error = 0; /* This whole next chunk of code is somewhat suspect... Not sure it's needed here at all... XXX */ if (rf_kbooted == RFK_BOOT_NONE) { printf("Doing restart on raidopen.\n"); rf_kbooted = RFK_BOOT_GOOD; rc = rf_boot(); if (rc) { rf_kbooted = RFK_BOOT_BAD; printf("Someone is unhappy...\n"); return(rc); } } if (unit >= numraid) return (ENXIO); rs = &raid_softc[unit]; if ((error = raidlock(rs)) != 0) return(error); lp = rs->sc_dkdev.dk_label; raidID = raidunit(dev); part = DISKPART(dev); pmask = (1 << part); db1_printf(("Opening raid device number: %d partition: %d\n", raidID,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; } 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; raidunlock(rs); return (0); } void raidstrategy(bp) register struct buf *bp; { register int s; unsigned int raidID = raidunit(bp->b_dev); RF_Raid_t *raidPtr; struct raid_softc *rs = &raid_softc[raidID]; struct disklabel *lp; int wlabel; #if 0 db1_printf(("Strategy: 0x%x 0x%x\n",bp,bp->b_data)); db1_printf(("Strategy(2): bp->b_bufsize%d\n", (int)bp->b_bufsize)); db1_printf(("bp->b_count=%d\n",(int)bp->b_bcount)); db1_printf(("bp->b_resid=%d\n",(int)bp->b_resid)); db1_printf(("bp->b_blkno=%d\n",(int)bp->b_blkno)); if (bp->b_flags&B_READ) db1_printf(("READ\n")); else db1_printf(("WRITE\n")); #endif if (rf_kbooted != RFK_BOOT_GOOD) 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, wlabel) <= 0) { db1_printf(("Bounds check failed!!:%d %d\n", (int)bp->b_blkno,(int)wlabel)); biodone(bp); return; } s = splbio(); /* XXX Needed? */ db1_printf(("Beginning strategy...\n")); bp->b_resid = 0; bp->b_error = rf_DoAccessKernel(raidPtrs[raidID], bp, NULL, NULL, NULL); if (bp->b_error) { bp->b_flags |= B_ERROR; db1_printf(("bp->b_flags HAS B_ERROR SET!!!: %d\n", bp->b_error)); } splx(s); #if 0 db1_printf(("Strategy exiting: 0x%x 0x%x %d %d\n", bp,bp->b_data, (int)bp->b_bcount,(int)bp->b_resid)); #endif } /* ARGSUSED */ int raidread(dev, uio, flags) dev_t dev; struct uio *uio; int flags; { int unit = raidunit(dev); struct raid_softc *rs; int result; 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)); #if 0 return (physio(raidstrategy, NULL, dev, B_READ, minphys, uio)); #endif result=physio(raidstrategy, NULL, dev, B_READ, minphys, uio); db1_printf(("raidread done. Result is %d %d\n", result,uio->uio_resid)); return(result); } /* 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; #if 0 int r,c; #endif /* struct raid_ioctl *ccio = (struct ccd_ioctl *)data; */ /* struct ccdbuf *cbp; */ /* struct raidbuf *raidbp; */ RF_Config_t *k_cfg, *u_cfg; u_char *specific_buf; int retcode = 0; int row; struct rf_recon_req *rrcopy, *rr; #if 0 int nbytes, spl, rw, row; struct rf_test_acc *ta; struct buf *bp; RF_SparetWait_t *waitreq; struct rf_test_acc *ta_p, *ta_copy; #endif if (unit >= numraid) return (ENXIO); rs = &raid_softc[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 DIOCGDEFLABEL: 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_CHECKRECON: if ((rs->sc_flags & RAIDF_INITED) == 0) return (ENXIO); } switch (cmd) { /* configure the system */ case RAIDFRAME_CONFIGURE: db3_printf(("rf_ioctl: RAIDFRAME_CONFIGURE\n")); /* 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) { db3_printf(("rf_ioctl: ENOMEM for config. Code is %d\n", retcode)); return(ENOMEM); } retcode = copyin((caddr_t) u_cfg, (caddr_t) k_cfg, sizeof(RF_Config_t)); if (retcode) { db3_printf(("rf_ioctl: retcode=%d copyin.1\n", retcode)); 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 */ db3_printf(("rf_ioctl: EINVAL %d\n", retcode)); return(EINVAL); } RF_Malloc(specific_buf,k_cfg->layoutSpecificSize, (u_char *)); if (specific_buf == NULL) { RF_Free(k_cfg,sizeof(RF_Config_t)); db3_printf(("rf_ioctl: ENOMEM %d\n", retcode)); return(ENOMEM); } retcode = copyin(k_cfg->layoutSpecific, (caddr_t) specific_buf, k_cfg->layoutSpecificSize); if (retcode) { db3_printf(("rf_ioctl: retcode=%d copyin.2\n", retcode)); return(retcode); } } else specific_buf = NULL; k_cfg->layoutSpecific = specific_buf; /* should do some kind of sanity check on the configuration. Store the sum of all the bytes in the last byte? */ #if 0 db1_printf(("Considering configuring the system.:%d 0x%x\n", unit,p)); #endif /* We need the pointer to this a little deeper, so stash it here... */ raidPtrs[unit]->proc = p; /* configure the system */ rf_pending_testaccs = 0; raidPtrs[unit]->raidid = unit; retcode = rf_Configure(raidPtrs[unit], k_cfg); if (retcode == 0) { retcode = raidinit(dev, raidPtrs[unit],unit); } /* 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)); db3_printf(("rf_ioctl: retcode=%d RAIDFRAME_CONFIGURE\n", retcode)); return(retcode); /* shutdown the system */ case RAIDFRAME_SHUTDOWN: 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); } /* the intention here was to disallow shutdowns while raidframe is mounted, but it doesn't work because the shutdown ioctl calls rf_open */ if (rf_pending_testaccs > 0) { printf("RAIDFRAME: Can't shutdown because there are %d pending test accs\n", rf_pending_testaccs); return(EINVAL); } if (rf_debugKernelAccess) { printf("call shutdown\n"); } raidPtrs[unit]->proc = p; /* XXX necessary evil */ retcode = rf_Shutdown(raidPtrs[unit]); db1_printf(("Done main shutdown\n")); pool_destroy(&rs->sc_cbufpool); db1_printf(("Done freeing component buffer freelist\n")); /* It's no longer initialized... */ rs->sc_flags &= ~RAIDF_INITED; /* Detach the disk. */ disk_detach(&rs->sc_dkdev); raidunlock(rs); return(retcode); /* initialize all parity */ case RAIDFRAME_REWRITEPARITY: if (raidPtrs[unit]->Layout.map->faultsTolerated == 0) return(EINVAL); /* borrow the thread of the requesting process */ raidPtrs[unit]->proc = p; /* Blah... :-p GO */ retcode = rf_RewriteParity(raidPtrs[unit]); /* return I/O Error if the parity rewrite fails */ if (retcode) retcode = EIO; return(retcode); /* issue a test-unit-ready through raidframe to the indicated device */ #if 0 /* XXX not supported yet (ever?) */ case RAIDFRAME_TUR: /* debug only */ retcode = rf_SCSI_DoTUR(0, 0, 0, 0, *(dev_t *) data); return(retcode); #endif case RAIDFRAME_GET_INFO: { RF_Raid_t *raid = raidPtrs[unit]; RF_DeviceConfig_t *cfg, **ucfgp; int i, j, d; if (!raid->valid) return(ENODEV); ucfgp = (RF_DeviceConfig_t **)data; RF_Malloc(cfg,sizeof(RF_DeviceConfig_t), (RF_DeviceConfig_t *)); if (cfg == NULL) return(ENOMEM); bzero((char *)cfg, sizeof(RF_DeviceConfig_t)); cfg->rows = raid->numRow; cfg->cols = raid->numCol; cfg->ndevs = raid->numRow * raid->numCol; if (cfg->ndevs >= RF_MAX_DISKS) { cfg->ndevs = 0; return(ENOMEM); } cfg->nspares = raid->numSpare; if (cfg->nspares >= RF_MAX_DISKS) { cfg->nspares = 0; return(ENOMEM); } cfg->maxqdepth = raid->maxQueueDepth; d = 0; for(i=0;irows;i++) { for(j=0;jcols;j++) { cfg->devs[d] = raid->Disks[i][j]; d++; } } for(j=cfg->cols,i=0;inspares;i++,j++) { cfg->spares[i] = raid->Disks[0][j]; } retcode = copyout((caddr_t)cfg, (caddr_t)*ucfgp, sizeof(RF_DeviceConfig_t)); RF_Free(cfg,sizeof(RF_DeviceConfig_t)); return(retcode); } break; case RAIDFRAME_RESET_ACCTOTALS: { RF_Raid_t *raid = raidPtrs[unit]; bzero(&raid->acc_totals, sizeof(raid->acc_totals)); return(0); } break; case RAIDFRAME_GET_ACCTOTALS: { RF_AccTotals_t *totals = (RF_AccTotals_t *)data; RF_Raid_t *raid = raidPtrs[unit]; *totals = raid->acc_totals; return(0); } break; case RAIDFRAME_KEEP_ACCTOTALS: { RF_Raid_t *raid = raidPtrs[unit]; int *keep = (int *)data; raid->keep_acc_totals = *keep; return(0); } break; case RAIDFRAME_GET_SIZE: *(int *) data = raidPtrs[unit]->totalSectors; return(0); #define RAIDFRAME_RECON 1 /* XXX The above should probably be set somewhere else!! GO */ #if RAIDFRAME_RECON > 0 /* fail a disk & optionally start reconstruction */ case RAIDFRAME_FAIL_DISK: rr = (struct rf_recon_req *) data; if (rr->row < 0 || rr->row >= raidPtrs[unit]->numRow || rr->col < 0 || rr->col >= raidPtrs[unit]->numCol) return(EINVAL); printf("Failing the disk: row: %d col: %d\n",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 *)); bcopy(rr, rrcopy, sizeof(*rr)); rrcopy->raidPtr = (void *) raidPtrs[unit]; LOCK_RECON_Q_MUTEX(); rrcopy->next = recon_queue; recon_queue = rrcopy; wakeup(&recon_queue); UNLOCK_RECON_Q_MUTEX(); return(0); /* invoke a copyback operation after recon on whatever disk needs it, if any */ case RAIDFRAME_COPYBACK: /* borrow the current thread to get this done */ raidPtrs[unit]->proc = p; /* ICK.. but needed :-p GO */ rf_CopybackReconstructedData(raidPtrs[unit]); return(0); /* return the percentage completion of reconstruction */ case RAIDFRAME_CHECKRECON: row = *(int *) data; if (row < 0 || row >= raidPtrs[unit]->numRow) return(EINVAL); if (raidPtrs[unit]->status[row] != rf_rs_reconstructing) *(int *) data = 100; else *(int *) data = raidPtrs[unit]->reconControl[row]->percentComplete; return(0); /* 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 */ #if 0 case RAIDFRAME_SPARET_WAIT: 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; /* structure assignment */ RF_Free(waitreq, sizeof(*waitreq)); return(0); /* wakes up a process waiting on SPARET_WAIT and puts an error code in it that will cause the dameon to exit */ case RAIDFRAME_ABORT_SPARET_WAIT: 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); /* used by the spare table daemon to deliver a spare table into the kernel */ case RAIDFRAME_SEND_SPARET: /* install the spare table */ retcode = rf_SetSpareTable(raidPtrs[unit],*(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 #endif /* RAIDFRAME_RECON > 0 */ default: break; /* fall through to the os-specific code below */ } if (!raidPtrs[unit]->valid) return(EINVAL); /* * Add support for "regular" device ioctls here. */ switch (cmd) { case DIOCGDINFO: db1_printf(("DIOCGDINFO %d %d\n",(int)dev,(int)DISKPART(dev))); *(struct disklabel *)data = *(rs->sc_dkdev.dk_label); break; case DIOCGPART: db1_printf(("DIOCGPART: %d %d\n",(int)dev,(int)DISKPART(dev))); ((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: db1_printf(("DIOCWDINFO\n")); case DIOCSDINFO: db1_printf(("DIOCSDINFO\n")); 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: db1_printf(("DIOCWLABEL\n")); if (*(int *)data != 0) rs->sc_flags |= RAIDF_WLABEL; else rs->sc_flags &= ~RAIDF_WLABEL; break; case DIOCGDEFLABEL: db1_printf(("DIOCGDEFLABEL\n")); raidgetdefaultlabel(raidPtrs[unit], rs, (struct disklabel *)data); break; default: retcode = ENOTTY; /* XXXX ?? OR EINVAL ? */ } return(retcode); } /* raidinit -- complete the rest of the initialization for the RAIDframe device. */ static int raidinit(dev, raidPtr,unit) dev_t dev; RF_Raid_t *raidPtr; int unit; { int retcode; /* int ix; */ /* struct raidbuf *raidbp; */ struct raid_softc *rs; retcode = 0; rs = &raid_softc[unit]; pool_init(&rs->sc_cbufpool, sizeof(struct raidbuf), 0, 0, 0, "raidpl", 0, NULL, NULL, M_DEVBUF); /* XXX should check return code first... */ rs->sc_flags |= RAIDF_INITED; sprintf(rs->sc_xname, "raid%d", unit); /* XXX doesn't check bounds.*/ 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); } /********************************************************* * * initialization code called at boot time (startup.c) * ********************************************************/ int rf_boot() { int i, rc; rc = rf_mutex_init(&rf_sparet_wait_mutex); if (rc) { RF_PANIC(); } rc = rf_mutex_init(&rf_async_done_q_mutex); if (rc) { RF_PANIC(); } rf_sparet_wait_queue = rf_sparet_resp_queue = NULL; recon_queue = NULL; rf_async_done_qh = rf_async_done_qt = NULL; for (i=0; inext; UNLOCK_RECON_Q_MUTEX(); /* * If flags specifies that we should start recon, this call * will not return until reconstruction completes, fails, or is aborted. */ rf_FailDisk((RF_Raid_t *) req->raidPtr, req->row, req->col, ((req->flags&RF_FDFLAGS_RECON) ? 1 : 0)); RF_Free(req, sizeof(*req)); } } /* 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 */ 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 | PCATCH, "raidframe getsparetable", 0); #if 0 mpsleep(&rf_sparet_resp_queue, PZERO, "sparet resp", 0, (void *) simple_lock_addr(rf_sparet_wait_mutex), MS_LOCK_SIMPLE); #endif } req = rf_sparet_resp_queue; rf_sparet_resp_queue = req->next; RF_UNLOCK_MUTEX(rf_sparet_wait_mutex); retcode = req->fcol; RF_Free(req, sizeof(*req)); /* this is not the same req as we alloc'd */ 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) */ int rf_DoAccessKernel(raidPtr, bp, flags, cbFunc, cbArg) RF_Raid_t *raidPtr; struct buf *bp; RF_RaidAccessFlags_t flags; void (*cbFunc)(struct buf *); void *cbArg; { 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; /* XXX The dev_t used here should be for /dev/[r]raid* !!! */ unit = raidPtr->raidid; rs = &raid_softc[unit]; /* 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(("updated: %d %d\n",DISKPART(bp->b_dev), pp->p_offset)); } else { db1_printf(("Is raw..\n")); } 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); return(bp->b_error); } /* * 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); return(bp->b_error); } db1_printf(("Calling DoAccess..\n")); /* don't ever condition on bp->b_flags & B_WRITE. always condition on B_READ instead */ retcode = rf_DoAccess(raidPtr, (bp->b_flags & B_READ) ? RF_IO_TYPE_READ : RF_IO_TYPE_WRITE, 0, raid_addr, num_blocks, bp->b_un.b_addr, bp, NULL, NULL, RF_DAG_NONBLOCKING_IO|flags, NULL, cbFunc, cbArg); #if 0 db1_printf(("After call to DoAccess: 0x%x 0x%x %d\n",bp, bp->b_data,(int)bp->b_resid)); #endif return(retcode); } /* 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; /* 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; /* 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; } raidbp = RAIDGETBUF(rs); raidbp->rf_flags = 0; /* XXX not really used anywhere... */ /* * context for raidiodone */ raidbp->rf_obp = bp; raidbp->req = req; switch (req->type) { case RF_IO_TYPE_NOP: /* used primarily to unlock a locked queue */ /* Dprintf2("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?? */ KernelWakeupFunc(&raidbp->rf_buf); break; case RF_IO_TYPE_READ: case RF_IO_TYPE_WRITE: if (req->tracerec) { RF_ETIMER_START(req->tracerec->timer); } InitBP(&raidbp->rf_buf, queue->rf_cinfo->ci_vp, op | bp->b_flags, queue->rf_cinfo->ci_dev, req->sectorOffset, req->numSector, req->buf, 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; /* Dprintf3("rf_DispatchKernelIO: %c to row %d col %d\n", req->type, queue->row, queue->col); */ 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")); return(0); } /* this is the callback function associated with a I/O invoked from kernel code. */ static void 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; register int s; s=splbio(); /* XXX */ db1_printf(("recovering the request queue:\n")); req = raidbp->req; bp = raidbp->rf_obp; #if 0 db1_printf(("bp=0x%x\n",bp)); #endif queue = (RF_DiskQueue_t *) req->queue; if (raidbp->rf_buf.b_flags & B_ERROR) { #if 0 printf("Setting bp->b_flags!!! %d\n",raidbp->rf_buf.b_error); #endif bp->b_flags |= B_ERROR; bp->b_error = raidbp->rf_buf.b_error ? raidbp->rf_buf.b_error : EIO; } #if 0 db1_printf(("raidbp->rf_buf.b_bcount=%d\n",(int)raidbp->rf_buf.b_bcount)); db1_printf(("raidbp->rf_buf.b_bufsize=%d\n",(int)raidbp->rf_buf.b_bufsize)); db1_printf(("raidbp->rf_buf.b_resid=%d\n",(int)raidbp->rf_buf.b_resid)); db1_printf(("raidbp->rf_buf.b_data=0x%x\n",raidbp->rf_buf.b_data)); #endif /* XXX methinks this could be wrong... */ #if 1 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 1 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++; } else { /* Disk is already dead... */ /* printf("Disk already marked as dead!\n"); */ } } #endif rs = &raid_softc[unit]; RAIDPUTBUF(rs,raidbp); if (bp->b_resid==0) { db1_printf(("Disk is no longer busy for this buffer... %d %ld %ld\n", unit, bp->b_resid, bp->b_bcount)); /* XXX is this the right place for a disk_unbusy()??!??!?!? */ disk_unbusy(&rs->sc_dkdev, (bp->b_bcount - bp->b_resid)); } else { db1_printf(("b_resid is still %ld\n",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); /* printf("Exiting KernelWakeupFunc\n"); */ splx(s); /* XXX */ } /* * initialize a buf structure for doing an I/O in the kernel. */ static void InitBP( 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; db1_printf(("bp->b_dev is %d\n", dev)); bp->b_un.b_addr = buf; #if 0 db1_printf(("bp->b_data=0x%x\n",bp->b_data)); #endif bp->b_blkno = startSect; bp->b_resid = bp->b_bcount; /* XXX is this right!??!?!! */ db1_printf(("b_bcount is: %d\n",(int)bp->b_bcount)); if (bp->b_bcount == 0) { panic("bp->b_bcount is zero in InitBP!!\n"); } bp->b_proc = b_proc; bp->b_iodone = cbFunc; bp->b_vp = b_vp; } #endif /* KERNEL */ /* Extras... */ unsigned int rpcc() { /* XXX no clue what this is supposed to do.. my guess is that it's supposed to read the CPU cycle counter... */ /* db1_printf("this is supposed to do something useful too!??\n"); */ return(0); } #if 0 int rf_GetSpareTableFromDaemon(req) RF_SparetWait_t *req; { int retcode=1; printf("This is supposed to do something useful!!\n"); /* XXX */ return(retcode); } #endif static 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 = 1024 * (1024 / raidPtr->bytesPerSector); lp->d_ntracks = 1; lp->d_ncylinders = raidPtr->totalSectors / lp->d_nsectors; 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. */ static 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); 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 (%d)\n", rs->sc_xname, lp->d_secperunit, 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 (%d)\n", rs->sc_xname, 'a' + i, rs->sc_size); } } } /* * Take care of things one might want to take care of in the event * that a disklabel isn't present. */ static 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); (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); (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); (void)vn_close(vp, FREAD|FWRITE, p->p_ucred, p); return (ENOTBLK); } VOP_UNLOCK(vp, 0); *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 ) */ static 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. */ static 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); } }