/* * * Coda: an Experimental Distributed File System * Release 3.1 * * Copyright (c) 1987-1998 Carnegie Mellon University * All Rights Reserved * * 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, and * that credit is given to Carnegie Mellon University in all documents * and publicity pertaining to direct or indirect use of this code or its * derivatives. * * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. 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 DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF * ANY DERIVATIVE WORK. * * Carnegie Mellon encourages users of this software to return any * improvements or extensions that they make, and to grant Carnegie * Mellon the rights to redistribute these changes without encumbrance. * * @(#) src/sys/cfs/cfs_vfsops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ * $Id: $ * */ /* * Mach Operating System * Copyright (c) 1989 Carnegie-Mellon University * All rights reserved. The CMU software License Agreement specifies * the terms and conditions for use and redistribution. */ /* * This code was written for the Coda file system at Carnegie Mellon * University. Contributers include David Steere, James Kistler, and * M. Satyanarayanan. */ /* * HISTORY * $Log: cfs_vfsops.c,v $ * Revision 1.1.1.1 1998/08/29 21:14:52 rvb * Very Preliminary Coda * * Revision 1.11 1998/08/28 18:12:22 rvb * Now it also works on FreeBSD -current. This code will be * committed to the FreeBSD -current and NetBSD -current * trees. It will then be tailored to the particular platform * by flushing conditional code. * * Revision 1.10 1998/08/18 17:05:19 rvb * Don't use __RCSID now * * Revision 1.9 1998/08/18 16:31:44 rvb * Sync the code for NetBSD -current; test on 1.3 later * * Revision 1.8 98/02/24 22:22:48 rvb * Fixes up mainly to flush iopen and friends * * Revision 1.7 98/01/23 11:53:45 rvb * Bring RVB_CFS1_1 to HEAD * * Revision 1.6.2.6 98/01/23 11:21:07 rvb * Sync with 2.2.5 * * Revision 1.6.2.5 98/01/22 13:05:33 rvb * Move makecfsnode ctlfid later so vfsp is known * * Revision 1.6.2.4 97/12/19 14:26:05 rvb * session id * * Revision 1.6.2.3 97/12/16 12:40:11 rvb * Sync with 1.3 * * Revision 1.6.2.2 97/12/10 11:40:25 rvb * No more ody * * Revision 1.6.2.1 97/12/06 17:41:24 rvb * Sync with peters coda.h * * Revision 1.6 97/12/05 10:39:21 rvb * Read CHANGES * * Revision 1.5.14.8 97/11/24 15:44:46 rvb * Final cfs_venus.c w/o macros, but one locking bug * * Revision 1.5.14.7 97/11/21 13:22:03 rvb * Catch a few cfscalls in cfs_vfsops.c * * Revision 1.5.14.6 97/11/20 11:46:48 rvb * Capture current cfs_venus * * Revision 1.5.14.5 97/11/18 10:27:17 rvb * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c * cfs_nb_foo and cfs_foo are joined * * Revision 1.5.14.4 97/11/13 22:03:01 rvb * pass2 cfs_NetBSD.h mt * * Revision 1.5.14.3 97/11/12 12:09:40 rvb * reorg pass1 * * Revision 1.5.14.2 97/10/29 16:06:28 rvb * Kill DYING * * Revision 1.5.14.1 1997/10/28 23:10:17 rvb * >64Meg; venus can be killed! * * Revision 1.5 1997/01/13 17:11:07 bnoble * Coda statfs needs to return something other than -1 for blocks avail. and * files available for wabi (and other windowsish) programs to install * there correctly. * * Revision 1.4 1996/12/12 22:11:00 bnoble * Fixed the "downcall invokes venus operation" deadlock in all known cases. * There may be more * * Revision 1.3 1996/11/08 18:06:12 bnoble * Minor changes in vnode operation signature, VOP_UPDATE signature, and * some newly defined bits in the include files. * * Revision 1.2 1996/01/02 16:57:04 bnoble * Added support for Coda MiniCache and raw inode calls (final commit) * * Revision 1.1.2.1 1995/12/20 01:57:32 bnoble * Added CFS-specific files * * Revision 3.1.1.1 1995/03/04 19:08:02 bnoble * Branch for NetBSD port revisions * * Revision 3.1 1995/03/04 19:08:01 bnoble * Bump to major revision 3 to prepare for NetBSD port * * Revision 2.4 1995/02/17 16:25:22 dcs * These versions represent several changes: * 1. Allow venus to restart even if outstanding references exist. * 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d * 3. Allow ody_expand to return many members, not just one. * * Revision 2.3 94/10/14 09:58:21 dcs * Made changes 'cause sun4s have braindead compilers * * Revision 2.2 94/10/12 16:46:33 dcs * Cleaned kernel/venus interface by removing XDR junk, plus * so cleanup to allow this code to be more easily ported. * * Revision 1.3 93/05/28 16:24:29 bnoble * *** empty log message *** * * Revision 1.2 92/10/27 17:58:24 lily * merge kernel/latest and alpha/src/cfs * * Revision 2.3 92/09/30 14:16:32 mja * Added call to cfs_flush to cfs_unmount. * [90/12/15 dcs] * * Added contributors blurb. * [90/12/13 jjk] * * Revision 2.2 90/07/05 11:26:40 mrt * Created for the Coda File System. * [90/05/23 dcs] * * Revision 1.3 90/05/31 17:01:42 dcs * Prepare for merge with facilities kernel. * * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include MALLOC_DEFINE(M_CFS, "CFS storage", "Various Coda Structures"); int cfsdebug = 0; int cfs_vfsop_print_entry = 0; #define ENTRY if(cfs_vfsop_print_entry) myprintf(("Entered %s\n",__FUNCTION__)) struct vnode *cfs_ctlvp; struct cfs_mntinfo cfs_mnttbl[NVCFS]; /* indexed by minor device number */ /* structure to keep statistics of internally generated/satisfied calls */ struct cfs_op_stats cfs_vfsopstats[CFS_VFSOPS_SIZE]; #define MARK_ENTRY(op) (cfs_vfsopstats[op].entries++) #define MARK_INT_SAT(op) (cfs_vfsopstats[op].sat_intrn++) #define MARK_INT_FAIL(op) (cfs_vfsopstats[op].unsat_intrn++) #define MRAK_INT_GEN(op) (cfs_vfsopstats[op].gen_intrn++) extern int cfsnc_initialized; /* Set if cache has been initialized */ extern int vc_nb_open __P((dev_t, int, int, struct proc *)); struct vfsops cfs_vfsops = { cfs_mount, cfs_start, cfs_unmount, cfs_root, cfs_quotactl, cfs_nb_statfs, cfs_sync, cfs_vget, (int (*) (struct mount *, struct fid *, struct sockaddr *, struct vnode **, int *, struct ucred **)) eopnotsupp, (int (*) (struct vnode *, struct fid *)) eopnotsupp, cfs_init, }; VFS_SET(cfs_vfsops, cfs, MOUNT_CFS, VFCF_NETWORK); int cfs_vfsopstats_init(void) { register int i; for (i=0;ini_vp; if (error) { MARK_INT_FAIL(CFS_MOUNT_STATS); return (error); } if (dvp->v_type != VCHR) { MARK_INT_FAIL(CFS_MOUNT_STATS); vrele(dvp); return(ENXIO); } dev = dvp->v_specinfo->si_rdev; vrele(dvp); if (major(dev) >= nchrdev || major(dev) < 0) { MARK_INT_FAIL(CFS_MOUNT_STATS); return(ENXIO); } /* * See if the device table matches our expectations. */ if (cdevsw[major(dev)]->d_open != vc_nb_open) { MARK_INT_FAIL(CFS_MOUNT_STATS); return(ENXIO); } if (minor(dev) >= NVCFS || minor(dev) < 0) { MARK_INT_FAIL(CFS_MOUNT_STATS); return(ENXIO); } /* * Initialize the mount record and link it to the vfs struct */ mi = &cfs_mnttbl[minor(dev)]; if (!VC_OPEN(&mi->mi_vcomm)) { MARK_INT_FAIL(CFS_MOUNT_STATS); return(ENODEV); } /* No initialization (here) of mi_vcomm! */ vfsp->mnt_data = (qaddr_t)mi; vfs_getnewfsid (vfsp); mi->mi_vfsp = vfsp; /* * Make a root vnode to placate the Vnode interface, but don't * actually make the CFS_ROOT call to venus until the first call * to cfs_root in case a server is down while venus is starting. */ rootfid.Volume = 0; rootfid.Vnode = 0; rootfid.Unique = 0; cp = makecfsnode(&rootfid, vfsp, VDIR); rootvp = CTOV(cp); rootvp->v_flag |= VROOT; ctlfid.Volume = CTL_VOL; ctlfid.Vnode = CTL_VNO; ctlfid.Unique = CTL_UNI; /* cp = makecfsnode(&ctlfid, vfsp, VCHR); The above code seems to cause a loop in the cnode links. I don't totally understand when it happens, it is caught when closing down the system. */ cp = makecfsnode(&ctlfid, 0, VCHR); cfs_ctlvp = CTOV(cp); /* Add vfs and rootvp to chain of vfs hanging off mntinfo */ mi->mi_vfsp = vfsp; mi->mi_rootvp = rootvp; /* set filesystem block size */ vfsp->mnt_stat.f_bsize = 8192; /* XXX -JJK */ /* Set f_iosize. XXX -- inamura@isl.ntt.co.jp. For vnode_pager_haspage() references. The value should be obtained from underlying UFS. */ /* Checked UFS. iosize is set as 8192 */ vfsp->mnt_stat.f_iosize = 8192; /* error is currently guaranteed to be zero, but in case some code changes... */ CFSDEBUG(1, myprintf(("cfs_mount returned %d\n",error));); if (error) MARK_INT_FAIL(CFS_MOUNT_STATS); else MARK_INT_SAT(CFS_MOUNT_STATS); return(error); } int cfs_start(vfsp, flags, p) struct mount *vfsp; int flags; struct proc *p; { ENTRY; return (0); } int cfs_unmount(vfsp, mntflags, p) struct mount *vfsp; int mntflags; struct proc *p; { struct cfs_mntinfo *mi = vftomi(vfsp); int active, error = 0; ENTRY; MARK_ENTRY(CFS_UMOUNT_STATS); if (!CFS_MOUNTED(vfsp)) { MARK_INT_FAIL(CFS_UMOUNT_STATS); return(EINVAL); } if (mi->mi_vfsp == vfsp) { /* We found the victim */ if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp))) return (EBUSY); /* Venus is still running */ #ifdef DEBUG printf("cfs_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp)); #endif vrele(mi->mi_rootvp); active = cfs_kill(vfsp, NOT_DOWNCALL); error = vflush(mi->mi_vfsp, NULLVP, FORCECLOSE); printf("cfs_unmount: active = %d, vflush active %d\n", active, error); error = 0; /* I'm going to take this out to allow lookups to go through. I'm * not sure it's important anyway. -- DCS 2/2/94 */ /* vfsp->VFS_DATA = NULL; */ /* No more vfsp's to hold onto */ mi->mi_vfsp = NULL; mi->mi_rootvp = NULL; if (error) MARK_INT_FAIL(CFS_UMOUNT_STATS); else MARK_INT_SAT(CFS_UMOUNT_STATS); return(error); } return (EINVAL); } /* * find root of cfs */ int cfs_root(vfsp, vpp) struct mount *vfsp; struct vnode **vpp; { struct cfs_mntinfo *mi = vftomi(vfsp); struct vnode **result; int error; struct proc *p = curproc; /* XXX - bnoble */ ViceFid VFid; ENTRY; MARK_ENTRY(CFS_ROOT_STATS); result = NULL; if (vfsp == mi->mi_vfsp) { if ((VTOC(mi->mi_rootvp)->c_fid.Volume != 0) || (VTOC(mi->mi_rootvp)->c_fid.Vnode != 0) || (VTOC(mi->mi_rootvp)->c_fid.Unique != 0)) { /* Found valid root. */ *vpp = mi->mi_rootvp; /* On Mach, this is vref. On NetBSD, VOP_LOCK */ #if 1 vref(*vpp); vn_lock(*vpp, LK_EXCLUSIVE, p); #else vget(*vpp, LK_EXCLUSIVE, p); #endif MARK_INT_SAT(CFS_ROOT_STATS); return(0); } } error = venus_root(vftomi(vfsp), p->p_cred->pc_ucred, p, &VFid); if (!error) { /* * Save the new rootfid in the cnode, and rehash the cnode into the * cnode hash with the new fid key. */ cfs_unsave(VTOC(mi->mi_rootvp)); VTOC(mi->mi_rootvp)->c_fid = VFid; cfs_save(VTOC(mi->mi_rootvp)); *vpp = mi->mi_rootvp; #if 1 vref(*vpp); vn_lock(*vpp, LK_EXCLUSIVE, p); #else vget(*vpp, LK_EXCLUSIVE, p); #endif MARK_INT_SAT(CFS_ROOT_STATS); goto exit; } else if (error == ENODEV) { /* Gross hack here! */ /* * If Venus fails to respond to the CFS_ROOT call, cfscall returns * ENODEV. Return the uninitialized root vnode to allow vfs * operations such as unmount to continue. Without this hack, * there is no way to do an unmount if Venus dies before a * successful CFS_ROOT call is done. All vnode operations * will fail. */ *vpp = mi->mi_rootvp; #if 1 vref(*vpp); vn_lock(*vpp, LK_EXCLUSIVE, p); #else vget(*vpp, LK_EXCLUSIVE, p); #endif MARK_INT_FAIL(CFS_ROOT_STATS); error = 0; goto exit; } else { CFSDEBUG( CFS_ROOT, myprintf(("error %d in CFS_ROOT\n", error)); ); MARK_INT_FAIL(CFS_ROOT_STATS); goto exit; } exit: return(error); } int cfs_quotactl(vfsp, cmd, uid, arg, p) struct mount *vfsp; int cmd; uid_t uid; caddr_t arg; struct proc *p; { ENTRY; return (EOPNOTSUPP); } /* * Get file system statistics. */ int cfs_nb_statfs(vfsp, sbp, p) register struct mount *vfsp; struct statfs *sbp; struct proc *p; { ENTRY; /* MARK_ENTRY(CFS_STATFS_STATS); */ if (!CFS_MOUNTED(vfsp)) { /* MARK_INT_FAIL(CFS_STATFS_STATS);*/ return(EINVAL); } bzero(sbp, sizeof(struct statfs)); /* XXX - what to do about f_flags, others? --bnoble */ /* Below This is what AFS does #define NB_SFS_SIZ 0x895440 */ /* Note: Normal fs's have a bsize of 0x400 == 1024 */ sbp->f_type = MOUNT_CFS; sbp->f_bsize = 8192; /* XXX */ sbp->f_iosize = 8192; /* XXX */ #define NB_SFS_SIZ 0x8AB75D sbp->f_blocks = NB_SFS_SIZ; sbp->f_bfree = NB_SFS_SIZ; sbp->f_bavail = NB_SFS_SIZ; sbp->f_files = NB_SFS_SIZ; sbp->f_ffree = NB_SFS_SIZ; bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t)); strcpy(sbp->f_mntonname, "/coda"); strcpy(sbp->f_mntfromname, "CFS"); /* MARK_INT_SAT(CFS_STATFS_STATS); */ return(0); } /* * Flush any pending I/O. */ int cfs_sync(vfsp, waitfor, cred, p) struct mount *vfsp; int waitfor; struct ucred *cred; struct proc *p; { ENTRY; MARK_ENTRY(CFS_SYNC_STATS); MARK_INT_SAT(CFS_SYNC_STATS); return(0); } int cfs_vget(vfsp, ino, vpp) struct mount *vfsp; ino_t ino; struct vnode **vpp; { ENTRY; return (EOPNOTSUPP); } /* * fhtovp is now what vget used to be in 4.3-derived systems. For * some silly reason, vget is now keyed by a 32 bit ino_t, rather than * a type-specific fid. */ int cfs_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp) register struct mount *vfsp; struct fid *fhp; struct mbuf *nam; struct vnode **vpp; int *exflagsp; struct ucred **creadanonp; { struct cfid *cfid = (struct cfid *)fhp; struct cnode *cp = 0; int error; struct proc *p = curproc; /* XXX -mach */ ViceFid VFid; int vtype; ENTRY; MARK_ENTRY(CFS_VGET_STATS); /* Check for vget of control object. */ if (IS_CTL_FID(&cfid->cfid_fid)) { *vpp = cfs_ctlvp; vref(cfs_ctlvp); MARK_INT_SAT(CFS_VGET_STATS); return(0); } error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, p->p_cred->pc_ucred, p, &VFid, &vtype); if (error) { CFSDEBUG(CFS_VGET, myprintf(("vget error %d\n",error));) *vpp = (struct vnode *)0; } else { CFSDEBUG(CFS_VGET, myprintf(("vget: vol %lx vno %lx uni %lx type %d result %d\n", VFid.Volume, VFid.Vnode, VFid.Unique, vtype, error)); ) cp = makecfsnode(&VFid, vfsp, vtype); *vpp = CTOV(cp); } return(error); } int cfs_vptofh(vnp, fidp) struct vnode *vnp; struct fid *fidp; { ENTRY; return (EOPNOTSUPP); } int cfs_init(struct vfsconf *vfsp) { ENTRY; return 0; } /* * To allow for greater ease of use, some vnodes may be orphaned when * Venus dies. Certain operations should still be allowed to go * through, but without propagating ophan-ness. So this function will * get a new vnode for the file from the current run of Venus. */ int getNewVnode(vpp) struct vnode **vpp; { struct cfid cfid; struct cfs_mntinfo *mi = vftomi((*vpp)->v_mount); ENTRY; cfid.cfid_len = (short)sizeof(ViceFid); cfid.cfid_fid = VTOC(*vpp)->c_fid; /* Structure assignment. */ /* XXX ? */ /* We're guessing that if set, the 1st element on the list is a * valid vnode to use. If not, return ENODEV as venus is dead. */ if (mi->mi_vfsp == NULL) return ENODEV; return cfs_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp, NULL, NULL); } #include #include /* get the mount structure corresponding to a given device. Assume * device corresponds to a UFS. Return NULL if no device is found. */ struct mount *devtomp(dev) dev_t dev; { struct mount *mp, *nmp; for (mp = mountlist.cqh_first; mp != (void*)&mountlist; mp = nmp) { nmp = mp->mnt_list.cqe_next; if (((VFSTOUFS(mp))->um_dev == (dev_t) dev)) { /* mount corresponds to UFS and the device matches one we want */ return(mp); } } /* mount structure wasn't found */ return(NULL); }