diff options
Diffstat (limited to 'sys/cfs/cfs_vnodeops.c')
| -rw-r--r-- | sys/cfs/cfs_vnodeops.c | 2157 |
1 files changed, 0 insertions, 2157 deletions
diff --git a/sys/cfs/cfs_vnodeops.c b/sys/cfs/cfs_vnodeops.c deleted file mode 100644 index f505af500d6a..000000000000 --- a/sys/cfs/cfs_vnodeops.c +++ /dev/null @@ -1,2157 +0,0 @@ -/* - * - * 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_vnodeops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ - * $Id: cfs_vnodeops.c,v 1.2 1998/09/02 19:09:53 rvb Exp $ - * - */ - -/* - * Mach Operating System - * Copyright (c) 1990 Carnegie-Mellon University - * 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_vnodeops.c,v $ - * Revision 1.2 1998/09/02 19:09:53 rvb - * Pass2 complete - * - * Revision 1.1.1.1 1998/08/29 21:14:52 rvb - * Very Preliminary Coda - * - * Revision 1.12 1998/08/28 18:28:00 rvb - * NetBSD -current is stricter! - * - * Revision 1.11 1998/08/28 18:12:23 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 17:05:21 rvb - * Don't use __RCSID now - * - * Revision 1.9 1998/08/18 16:31:46 rvb - * Sync the code for NetBSD -current; test on 1.3 later - * - * Revision 1.8 98/02/24 22:22:50 rvb - * Fixes up mainly to flush iopen and friends - * - * Revision 1.7 98/01/31 20:53:15 rvb - * First version that works on FreeBSD 2.2.5 - * - * Revision 1.6 98/01/23 11:53:47 rvb - * Bring RVB_CODA1_1 to HEAD - * - * Revision 1.5.2.8 98/01/23 11:21:11 rvb - * Sync with 2.2.5 - * - * Revision 1.5.2.7 97/12/19 14:26:08 rvb - * session id - * - * Revision 1.5.2.6 97/12/16 22:01:34 rvb - * Oops add cfs_subr.h cfs_venus.h; sync with peter - * - * Revision 1.5.2.5 97/12/16 12:40:14 rvb - * Sync with 1.3 - * - * Revision 1.5.2.4 97/12/10 14:08:31 rvb - * Fix O_ flags; check result in coda_call - * - * Revision 1.5.2.3 97/12/10 11:40:27 rvb - * No more ody - * - * Revision 1.5.2.2 97/12/09 16:07:15 rvb - * Sync with vfs/include/coda.h - * - * Revision 1.5.2.1 97/12/06 17:41:25 rvb - * Sync with peters coda.h - * - * Revision 1.5 97/12/05 10:39:23 rvb - * Read CHANGES - * - * Revision 1.4.14.10 97/11/25 08:08:48 rvb - * cfs_venus ... done; until cred/vattr change - * - * Revision 1.4.14.9 97/11/24 15:44:48 rvb - * Final cfs_venus.c w/o macros, but one locking bug - * - * Revision 1.4.14.8 97/11/21 11:28:04 rvb - * cfs_venus.c is done: first pass - * - * Revision 1.4.14.7 97/11/20 11:46:51 rvb - * Capture current cfs_venus - * - * Revision 1.4.14.6 97/11/18 10:27:19 rvb - * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c - * cfs_nb_foo and cfs_foo are joined - * - * Revision 1.4.14.5 97/11/13 22:03:03 rvb - * pass2 cfs_NetBSD.h mt - * - * Revision 1.4.14.4 97/11/12 12:09:42 rvb - * reorg pass1 - * - * Revision 1.4.14.3 97/11/06 21:03:28 rvb - * don't include headers in headers - * - * Revision 1.4.14.2 97/10/29 16:06:30 rvb - * Kill DYING - * - * Revision 1.4.14.1 1997/10/28 23:10:18 rvb - * >64Meg; venus can be killed! - * - * Revision 1.4 1997/02/20 13:54:50 lily - * check for NULL return from coda_nc_lookup before CTOV - * - * Revision 1.3 1996/12/12 22:11:02 bnoble - * Fixed the "downcall invokes venus operation" deadlock in all known cases. - * There may be more - * - * Revision 1.2 1996/01/02 16:57:07 bnoble - * Added support for Coda MiniCache and raw inode calls (final commit) - * - * Revision 1.1.2.1 1995/12/20 01:57:34 bnoble - * Added CODA-specific files - * - * Revision 3.1.1.1 1995/03/04 19:08:06 bnoble - * Branch for NetBSD port revisions - * - * Revision 3.1 1995/03/04 19:08:04 bnoble - * Bump to major revision 3 to prepare for NetBSD port - * - * Revision 2.6 1995/02/17 16:25:26 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 2.5 94/11/09 20:29:27 dcs - * Small bug in remove dealing with hard links and link counts was fixed. - * - * Revision 2.4 94/10/14 09:58:42 dcs - * Made changes 'cause sun4s have braindead compilers - * - * Revision 2.3 94/10/12 16:46:37 dcs - * Cleaned kernel/venus interface by removing XDR junk, plus - * so cleanup to allow this code to be more easily ported. - * - * Revision 2.2 94/09/20 14:12:41 dcs - * Fixed bug in rename when moving a directory. - * - * Revision 2.1 94/07/21 16:25:22 satya - * Conversion to C++ 3.0; start of Coda Release 2.0 - * - * Revision 1.4 93/12/17 01:38:01 luqi - * Changes made for kernel to pass process info to Venus: - * - * (1) in file cfs.h - * add process id and process group id in most of the cfs argument types. - * - * (2) in file cfs_vnodeops.c - * add process info passing in most of the cfs vnode operations. - * - * (3) in file cfs_xdr.c - * expand xdr routines according changes in (1). - * add variable pass_process_info to allow venus for kernel version checking. - * - * Revision 1.3 93/05/28 16:24:33 bnoble - * *** empty log message *** - * - * Revision 1.2 92/10/27 17:58:25 lily - * merge kernel/latest and alpha/src/cfs - * - * Revision 2.4 92/09/30 14:16:37 mja - * Redid buffer allocation so that it does kmem_{alloc,free} for all - * architectures. Zone allocation, previously used on the 386, caused - * panics if it was invoked repeatedly. Stack allocation, previously - * used on all other architectures, tickled some Mach bug that appeared - * with large stack frames. - * [91/02/09 jjk] - * - * Added contributors blurb. - * [90/12/13 jjk] - * - * Revision 2.3 90/07/26 15:50:09 mrt - * Fixed fix to rename to remove .. from moved directories. - * [90/06/28 dcs] - * - * Revision 1.7 90/06/28 16:24:25 dcs - * Fixed bug with moving directories, we weren't flushing .. for the moved directory. - * - * Revision 1.6 90/05/31 17:01:47 dcs - * Prepare for merge with facilities kernel. - * - * - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/kernel.h> -#include <sys/proc.h> -#include <sys/malloc.h> -#include <sys/mount.h> -#include <sys/errno.h> -#include <sys/acct.h> -#include <sys/file.h> -#include <sys/fcntl.h> -#include <sys/uio.h> -#include <sys/namei.h> -#include <sys/ioccom.h> -#include <sys/select.h> - -#include <vm/vm.h> -#include <vm/vm_object.h> -#include <vm/vm_extern.h> -#include <vm/vm_zone.h> - -#include <cfs/coda.h> -#include <cfs/cnode.h> -#include <cfs/cfs_vnodeops.h> -#include <cfs/cfs_venus.h> -#include <cfs/coda_opstats.h> -#include <cfs/cfs_subr.h> -#include <cfs/cfsnc.h> -#include <cfs/pioctl.h> - -/* - * These flags select various performance enhancements. - */ -int coda_attr_cache = 1; /* Set to cache attributes in the kernel */ -int coda_symlink_cache = 1; /* Set to cache symbolic link information */ -int coda_access_cache = 1; /* Set to handle some access checks directly */ - -/* structure to keep track of vfs calls */ - -struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE]; - -#define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++) -#define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++) -#define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++) -#define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++) - -/* What we are delaying for in printf */ -int coda_printf_delay = 0; /* in microseconds */ -int coda_vnop_print_entry = 0; -static int coda_lockdebug = 0; - -/* Definition of the vfs operation vector */ - -/* - * Some NetBSD details: - * - * coda_start is called at the end of the mount syscall. - * coda_init is called at boot time. - */ - -#define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__FUNCTION__)) - -/* Definition of the vnode operation vector */ - -struct vnodeopv_entry_desc coda_vnodeop_entries[] = { - { &vop_default_desc, coda_vop_error }, - { &vop_lookup_desc, coda_lookup }, /* lookup */ - { &vop_create_desc, coda_create }, /* create */ - { &vop_mknod_desc, coda_vop_error }, /* mknod */ - { &vop_open_desc, coda_open }, /* open */ - { &vop_close_desc, coda_close }, /* close */ - { &vop_access_desc, coda_access }, /* access */ - { &vop_getattr_desc, coda_getattr }, /* getattr */ - { &vop_setattr_desc, coda_setattr }, /* setattr */ - { &vop_read_desc, coda_read }, /* read */ - { &vop_write_desc, coda_write }, /* write */ - { &vop_ioctl_desc, coda_ioctl }, /* ioctl */ - { &vop_mmap_desc, coda_vop_error }, /* mmap */ - { &vop_fsync_desc, coda_fsync }, /* fsync */ - { &vop_remove_desc, coda_remove }, /* remove */ - { &vop_link_desc, coda_link }, /* link */ - { &vop_rename_desc, coda_rename }, /* rename */ - { &vop_mkdir_desc, coda_mkdir }, /* mkdir */ - { &vop_rmdir_desc, coda_rmdir }, /* rmdir */ - { &vop_symlink_desc, coda_symlink }, /* symlink */ - { &vop_readdir_desc, coda_readdir }, /* readdir */ - { &vop_readlink_desc, coda_readlink }, /* readlink */ - { &vop_abortop_desc, coda_abortop }, /* abortop */ - { &vop_inactive_desc, coda_inactive }, /* inactive */ - { &vop_reclaim_desc, coda_reclaim }, /* reclaim */ - { &vop_lock_desc, coda_lock }, /* lock */ - { &vop_unlock_desc, coda_unlock }, /* unlock */ - { &vop_bmap_desc, coda_bmap }, /* bmap */ - { &vop_strategy_desc, coda_strategy }, /* strategy */ - { &vop_print_desc, coda_vop_error }, /* print */ - { &vop_islocked_desc, coda_islocked }, /* islocked */ - { &vop_pathconf_desc, coda_vop_error }, /* pathconf */ - { &vop_advlock_desc, coda_vop_nop }, /* advlock */ - { &vop_bwrite_desc, coda_vop_error }, /* bwrite */ - { &vop_lease_desc, coda_vop_nop }, /* lease */ - { &vop_poll_desc, (vop_t *) vop_stdpoll }, - { &vop_getpages_desc, coda_fbsd_getpages }, /* pager intf.*/ - { &vop_putpages_desc, coda_fbsd_putpages }, /* pager intf.*/ - -#if 0 - - we need to define these someday -#define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd) -#define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd) -#define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc) -#define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee) -#define UFS_UPDATE(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_update(aa, bb, cc, dd) - - missing - { &vop_reallocblks_desc, (vop_t *) ufs_missingop }, - { &vop_cachedlookup_desc, (vop_t *) ufs_lookup }, - { &vop_whiteout_desc, (vop_t *) ufs_whiteout }, -#endif - { (struct vnodeop_desc*)NULL, (int(*)(void *))NULL } -}; - -static struct vnodeopv_desc coda_vnodeop_opv_desc = - { &coda_vnodeop_p, coda_vnodeop_entries }; - -VNODEOP_SET(coda_vnodeop_opv_desc); - -/* A generic panic: we were called with something we didn't define yet */ -int -coda_vop_error(void *anon) { - struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; - - myprintf(("Vnode operation %s called, but not defined\n", - (*desc)->vdesc_name)); - panic("coda_vop_error"); - return 0; -} - -/* A generic do-nothing. For lease_check, advlock */ -int -coda_vop_nop(void *anon) { - struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; - - if (codadebug) { - myprintf(("Vnode operation %s called, but unsupported\n", - (*desc)->vdesc_name)); - } - return (0); -} - -int -coda_vnodeopstats_init(void) -{ - register int i; - - for(i=0;i<CODA_VNODEOPS_SIZE;i++) { - coda_vnodeopstats[i].opcode = i; - coda_vnodeopstats[i].entries = 0; - coda_vnodeopstats[i].sat_intrn = 0; - coda_vnodeopstats[i].unsat_intrn = 0; - coda_vnodeopstats[i].gen_intrn = 0; - } - return 0; -} - -/* - * coda_open calls Venus to return the device, inode pair of the cache - * file holding the data. Using iget, coda_open finds the vnode of the - * cache file, and then opens it. - */ -int -coda_open(v) - void *v; -{ - /* - * NetBSD can pass the O_EXCL flag in mode, even though the check - * has already happened. Venus defensively assumes that if open - * is passed the EXCL, it must be a bug. We strip the flag here. - */ -/* true args */ - struct vop_open_args *ap = v; - register struct vnode **vpp = &(ap->a_vp); - struct cnode *cp = VTOC(*vpp); - int flag = ap->a_mode & (~O_EXCL); - struct ucred *cred = ap->a_cred; - struct proc *p = ap->a_p; -/* locals */ - int error; - struct vnode *vp; - dev_t dev; - ino_t inode; - - MARK_ENTRY(CODA_OPEN_STATS); - - /* Check for open of control file. */ - if (IS_CTL_VP(*vpp)) { - /* XXX */ - /* if (WRITEABLE(flag)) */ - if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) { - MARK_INT_FAIL(CODA_OPEN_STATS); - return(EACCES); - } - MARK_INT_SAT(CODA_OPEN_STATS); - return(0); - } - - error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, p, &dev, &inode); - if (error) - return (error); - if (!error) { - CODADEBUG( CODA_OPEN,myprintf(("open: dev %d inode %d result %d\n", - dev, inode, error)); ) - } - - /* Translate the <device, inode> pair for the cache file into - an inode pointer. */ - error = coda_grab_vnode(dev, inode, &vp); - if (error) - return (error); - - /* We get the vnode back locked. Needs unlocked */ - VOP_UNLOCK(vp, 0, p); - /* Keep a reference until the close comes in. */ - vref(*vpp); - - /* Save the vnode pointer for the cache file. */ - if (cp->c_ovp == NULL) { - cp->c_ovp = vp; - } else { - if (cp->c_ovp != vp) - panic("coda_open: cp->c_ovp != ITOV(ip)"); - } - cp->c_ocount++; - - /* Flush the attribute cached if writing the file. */ - if (flag & FWRITE) { - cp->c_owrite++; - cp->c_flags &= ~C_VATTR; - } - - /* Save the <device, inode> pair for the cache file to speed - up subsequent page_read's. */ - cp->c_device = dev; - cp->c_inode = inode; - - /* Open the cache file. */ - error = VOP_OPEN(vp, flag, cred, p); - if (error) { - printf("coda_open: VOP_OPEN on container failed %d\n", error); - return (error); - } - if (vp->v_type == VREG) { - error = vfs_object_create(vp, p, cred, 1); - if (error != 0) { - printf("coda_open: vfs_object_create() returns %d\n", error); - vput(vp); - } - } - return(error); -} - -/* - * Close the cache file used for I/O and notify Venus. - */ -int -coda_close(v) - void *v; -{ -/* true args */ - struct vop_close_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - int flag = ap->a_fflag; - struct ucred *cred = ap->a_cred; - struct proc *p = ap->a_p; -/* locals */ - int error; - - MARK_ENTRY(CODA_CLOSE_STATS); - - /* Check for close of control file. */ - if (IS_CTL_VP(vp)) { - MARK_INT_SAT(CODA_CLOSE_STATS); - return(0); - } - - if (IS_UNMOUNTING(cp)) { - if (cp->c_ovp) { - printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n", - vp->v_usecount, cp->c_ovp, vp, cp); - vgone(cp->c_ovp); - } else { - printf("coda_close: NO container vp %p/cp %p\n", vp, cp); - } - return ENODEV; - } else { - VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ - vrele(cp->c_ovp); - } - - if (--cp->c_ocount == 0) - cp->c_ovp = NULL; - - if (flag & FWRITE) /* file was opened for write */ - --cp->c_owrite; - - error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, p); - vrele(CTOV(cp)); - - CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); ) - return(error); -} - -int -coda_read(v) - void *v; -{ - struct vop_read_args *ap = v; - - ENTRY; - return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ, - ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); -} - -int -coda_write(v) - void *v; -{ - struct vop_write_args *ap = v; - - ENTRY; - return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE, - ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); -} - -int -coda_rdwr(vp, uiop, rw, ioflag, cred, p) - struct vnode *vp; - struct uio *uiop; - enum uio_rw rw; - int ioflag; - struct ucred *cred; - struct proc *p; -{ -/* upcall decl */ - /* NOTE: container file operation!!! */ -/* locals */ - struct cnode *cp = VTOC(vp); - struct vnode *cfvp = cp->c_ovp; - int igot_internally = 0; - int opened_internally = 0; - int error = 0; - - MARK_ENTRY(CODA_RDWR_STATS); - - CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %d, %qd, %d)\n", rw, - uiop->uio_iov->iov_base, uiop->uio_resid, - uiop->uio_offset, uiop->uio_segflg)); ) - - /* Check for rdwr of control object. */ - if (IS_CTL_VP(vp)) { - MARK_INT_FAIL(CODA_RDWR_STATS); - return(EINVAL); - } - - /* - * If file is not already open this must be a page - * {read,write} request. Iget the cache file's inode - * pointer if we still have its <device, inode> pair. - * Otherwise, we must do an internal open to derive the - * pair. - */ - if (cfvp == NULL) { - /* - * If we're dumping core, do the internal open. Otherwise - * venus won't have the correct size of the core when - * it's completely written. - */ - if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { - igot_internally = 1; - error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp); - if (error) { - MARK_INT_FAIL(CODA_RDWR_STATS); - return(error); - } - /* - * We get the vnode back locked in both Mach and - * NetBSD. Needs unlocked - */ - VOP_UNLOCK(cfvp, 0, p); - } - else { - opened_internally = 1; - MARK_INT_GEN(CODA_OPEN_STATS); - error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), - cred, p); -printf("coda_rdwr: Internally Opening %p\n", vp); - if (error) { - printf("coda_rdwr: VOP_OPEN on container failed %d\n", error); - return (error); - } - if (vp->v_type == VREG) { - error = vfs_object_create(vp, p, cred, 1); - if (error != 0) { - printf("coda_rdwr: vfs_object_create() returns %d\n", error); - vput(vp); - } - } - if (error) { - MARK_INT_FAIL(CODA_RDWR_STATS); - return(error); - } - cfvp = cp->c_ovp; - } - } - - /* Have UFS handle the call. */ - CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n", - cp->c_fid.Volume, cp->c_fid.Vnode, - cp->c_fid.Unique, CTOV(cp)->v_usecount)); ) - - if (rw == UIO_READ) { - error = VOP_READ(cfvp, uiop, ioflag, cred); - } else { - error = VOP_WRITE(cfvp, uiop, ioflag, cred); - /* ufs_write updates the vnode_pager_setsize for the vnode/object */ - { struct vattr attr; - - if (VOP_GETATTR(cfvp, &attr, cred, p) == 0) { - vnode_pager_setsize(vp, attr.va_size); - } - } - } - - if (error) - MARK_INT_FAIL(CODA_RDWR_STATS); - else - MARK_INT_SAT(CODA_RDWR_STATS); - - /* Do an internal close if necessary. */ - if (opened_internally) { - MARK_INT_GEN(CODA_CLOSE_STATS); - (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, p); - } - - /* Invalidate cached attributes if writing. */ - if (rw == UIO_WRITE) - cp->c_flags &= ~C_VATTR; - return(error); -} - -int -coda_ioctl(v) - void *v; -{ -/* true args */ - struct vop_ioctl_args *ap = v; - struct vnode *vp = ap->a_vp; - int com = ap->a_command; - caddr_t data = ap->a_data; - int flag = ap->a_fflag; - struct ucred *cred = ap->a_cred; - struct proc *p = ap->a_p; -/* locals */ - int error; - struct vnode *tvp; - struct nameidata ndp; - struct PioctlData *iap = (struct PioctlData *)data; - - MARK_ENTRY(CODA_IOCTL_STATS); - - CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));) - - /* Don't check for operation on a dying object, for ctlvp it - shouldn't matter */ - - /* Must be control object to succeed. */ - if (!IS_CTL_VP(vp)) { - MARK_INT_FAIL(CODA_IOCTL_STATS); - CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));) - return (EOPNOTSUPP); - } - /* Look up the pathname. */ - - /* Should we use the name cache here? It would get it from - lookupname sooner or later anyway, right? */ - - NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, ((caddr_t)iap->path), p); - error = namei(&ndp); - tvp = ndp.ni_vp; - - if (error) { - MARK_INT_FAIL(CODA_IOCTL_STATS); - CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n", - error));) - return(error); - } - - /* - * Make sure this is a coda style cnode, but it may be a - * different vfsp - */ - /* XXX: this totally violates the comment about vtagtype in vnode.h */ - if (tvp->v_tag != VT_CODA) { - vrele(tvp); - MARK_INT_FAIL(CODA_IOCTL_STATS); - CODADEBUG(CODA_IOCTL, - myprintf(("coda_ioctl error: %s not a coda object\n", - iap->path));) - return(EINVAL); - } - - if (iap->vi.in_size > VC_MAXDATASIZE) { - vrele(tvp); - return(EINVAL); - } - error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, p); - - if (error) - MARK_INT_FAIL(CODA_IOCTL_STATS); - else - CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) - - vrele(tvp); - return(error); -} - -/* - * To reduce the cost of a user-level venus;we cache attributes in - * the kernel. Each cnode has storage allocated for an attribute. If - * c_vattr is valid, return a reference to it. Otherwise, get the - * attributes from venus and store them in the cnode. There is some - * question if this method is a security leak. But I think that in - * order to make this call, the user must have done a lookup and - * opened the file, and therefore should already have access. - */ -int -coda_getattr(v) - void *v; -{ -/* true args */ - struct vop_getattr_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - struct vattr *vap = ap->a_vap; - struct ucred *cred = ap->a_cred; - struct proc *p = ap->a_p; -/* locals */ - int error; - - MARK_ENTRY(CODA_GETATTR_STATS); - - if (IS_UNMOUNTING(cp)) - return ENODEV; - - /* Check for getattr of control object. */ - if (IS_CTL_VP(vp)) { - MARK_INT_FAIL(CODA_GETATTR_STATS); - return(ENOENT); - } - - /* Check to see if the attributes have already been cached */ - if (VALID_VATTR(cp)) { - CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n", - cp->c_fid.Volume, - cp->c_fid.Vnode, - cp->c_fid.Unique));}); - CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) - print_vattr(&cp->c_vattr); ); - - *vap = cp->c_vattr; - MARK_INT_SAT(CODA_GETATTR_STATS); - return(0); - } - - error = venus_getattr(vtomi(vp), &cp->c_fid, cred, p, vap); - - if (!error) { - CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n", - cp->c_fid.Volume, - cp->c_fid.Vnode, - cp->c_fid.Unique, - error)); ) - - CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) - print_vattr(vap); ); - - { int size = vap->va_size; - struct vnode *convp = cp->c_ovp; - if (convp != (struct vnode *)0) { - vnode_pager_setsize(convp, size); - } - } - /* If not open for write, store attributes in cnode */ - if ((cp->c_owrite == 0) && (coda_attr_cache)) { - cp->c_vattr = *vap; - cp->c_flags |= C_VATTR; - } - - } - return(error); -} - -int -coda_setattr(v) - void *v; -{ -/* true args */ - struct vop_setattr_args *ap = v; - register struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - register struct vattr *vap = ap->a_vap; - struct ucred *cred = ap->a_cred; - struct proc *p = ap->a_p; -/* locals */ - int error; - - MARK_ENTRY(CODA_SETATTR_STATS); - - /* Check for setattr of control object. */ - if (IS_CTL_VP(vp)) { - MARK_INT_FAIL(CODA_SETATTR_STATS); - return(ENOENT); - } - - if (codadebug & CODADBGMSK(CODA_SETATTR)) { - print_vattr(vap); - } - error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, p); - - if (!error) - cp->c_flags &= ~C_VATTR; - - { int size = vap->va_size; - struct vnode *convp = cp->c_ovp; - if (size != VNOVAL && convp != (struct vnode *)0) { - vnode_pager_setsize(convp, size); - } - } - CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); ) - return(error); -} - -int -coda_access(v) - void *v; -{ -/* true args */ - struct vop_access_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - int mode = ap->a_mode; - struct ucred *cred = ap->a_cred; - struct proc *p = ap->a_p; -/* locals */ - int error; - - MARK_ENTRY(CODA_ACCESS_STATS); - - /* Check for access of control object. Only read access is - allowed on it. */ - if (IS_CTL_VP(vp)) { - /* bogus hack - all will be marked as successes */ - MARK_INT_SAT(CODA_ACCESS_STATS); - return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) - ? 0 : EACCES); - } - - /* - * if the file is a directory, and we are checking exec (eg lookup) - * access, and the file is in the namecache, then the user must have - * lookup access to it. - */ - if (coda_access_cache) { - if ((vp->v_type == VDIR) && (mode & VEXEC)) { - if (coda_nc_lookup(cp, ".", 1, cred)) { - MARK_INT_SAT(CODA_ACCESS_STATS); - return(0); /* it was in the cache */ - } - } - } - - error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, p); - - return(error); -} - -/* - * CODA abort op, called after namei() when a CREATE/DELETE isn't actually - * done. If a buffer has been saved in anticipation of a coda_create or - * a coda_remove, delete it. - */ -/* ARGSUSED */ -int -coda_abortop(v) - void *v; -{ -/* true args */ - struct vop_abortop_args /* { - struct vnode *a_dvp; - struct componentname *a_cnp; - } */ *ap = v; -/* upcall decl */ -/* locals */ - - if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) - zfree(namei_zone, ap->a_cnp->cn_pnbuf); - return (0); -} - -int -coda_readlink(v) - void *v; -{ -/* true args */ - struct vop_readlink_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - struct uio *uiop = ap->a_uio; - struct ucred *cred = ap->a_cred; - struct proc *p = ap->a_uio->uio_procp; -/* locals */ - int error; - char *str; - int len; - - MARK_ENTRY(CODA_READLINK_STATS); - - /* Check for readlink of control object. */ - if (IS_CTL_VP(vp)) { - MARK_INT_FAIL(CODA_READLINK_STATS); - return(ENOENT); - } - - if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ - uiop->uio_rw = UIO_READ; - error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); - if (error) - MARK_INT_FAIL(CODA_READLINK_STATS); - else - MARK_INT_SAT(CODA_READLINK_STATS); - return(error); - } - - error = venus_readlink(vtomi(vp), &cp->c_fid, cred, p, &str, &len); - - if (!error) { - uiop->uio_rw = UIO_READ; - error = uiomove(str, len, uiop); - - if (coda_symlink_cache) { - cp->c_symlink = str; - cp->c_symlen = len; - cp->c_flags |= C_SYMLINK; - } else - CODA_FREE(str, len); - } - - CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) - return(error); -} - -int -coda_fsync(v) - void *v; -{ -/* true args */ - struct vop_fsync_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - struct ucred *cred = ap->a_cred; - struct proc *p = ap->a_p; -/* locals */ - struct vnode *convp = cp->c_ovp; - int error; - - MARK_ENTRY(CODA_FSYNC_STATS); - - /* Check for fsync on an unmounting object */ - /* The NetBSD kernel, in it's infinite wisdom, can try to fsync - * after an unmount has been initiated. This is a Bad Thing, - * which we have to avoid. Not a legitimate failure for stats. - */ - if (IS_UNMOUNTING(cp)) { - return(ENODEV); - } - - /* Check for fsync of control object. */ - if (IS_CTL_VP(vp)) { - MARK_INT_SAT(CODA_FSYNC_STATS); - return(0); - } - - if (convp) - VOP_FSYNC(convp, cred, MNT_WAIT, p); - - /* - * We see fsyncs with usecount == 1 then usecount == 0. - * For now we ignore them. - */ - /* - if (!vp->v_usecount) { - printf("coda_fsync on vnode %p with %d usecount. c_flags = %x (%x)\n", - vp, vp->v_usecount, cp->c_flags, cp->c_flags&C_PURGING); - } - */ - - /* - * We can expect fsync on any vnode at all if venus is pruging it. - * Venus can't very well answer the fsync request, now can it? - * Hopefully, it won't have to, because hopefully, venus preserves - * the (possibly untrue) invariant that it never purges an open - * vnode. Hopefully. - */ - if (cp->c_flags & C_PURGING) { - return(0); - } - - /* needs research */ - return 0; - error = venus_fsync(vtomi(vp), &cp->c_fid, cred, p); - - CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ); - return(error); -} - -int -coda_inactive(v) - void *v; -{ - /* XXX - at the moment, inactive doesn't look at cred, and doesn't - have a proc pointer. Oops. */ -/* true args */ - struct vop_inactive_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - struct ucred *cred __attribute__((unused)) = NULL; - struct proc *p __attribute__((unused)) = curproc; -/* upcall decl */ -/* locals */ - - /* We don't need to send inactive to venus - DCS */ - MARK_ENTRY(CODA_INACTIVE_STATS); - - if (IS_CTL_VP(vp)) { - MARK_INT_SAT(CODA_INACTIVE_STATS); - return 0; - } - - CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n", - cp->c_fid.Volume, cp->c_fid.Vnode, - cp->c_fid.Unique, vp->v_mount));) - - /* If an array has been allocated to hold the symlink, deallocate it */ - if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { - if (cp->c_symlink == NULL) - panic("coda_inactive: null symlink pointer in cnode"); - - CODA_FREE(cp->c_symlink, cp->c_symlen); - cp->c_flags &= ~C_SYMLINK; - cp->c_symlen = 0; - } - - /* Remove it from the table so it can't be found. */ - coda_unsave(cp); - if ((struct coda_mntinfo *)(vp->v_mount->mnt_data) == NULL) { - myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); - panic("badness in coda_inactive\n"); - } - - if (IS_UNMOUNTING(cp)) { -#ifdef DEBUG - printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp); - if (cp->c_ovp != NULL) - printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n", - vp->v_usecount, vp, cp); -#endif - lockmgr(&cp->c_lock, LK_RELEASE, &vp->v_interlock, p); - } else { -#ifdef DIAGNOSTIC - if (CTOV(cp)->v_usecount) { - panic("coda_inactive: nonzero reference count"); - } - if (cp->c_ovp != NULL) { - panic("coda_inactive: cp->ovp != NULL"); - } -#endif - VOP_UNLOCK(vp, 0, p); - vgone(vp); - } - - MARK_INT_SAT(CODA_INACTIVE_STATS); - return(0); -} - -/* - * Remote file system operations having to do with directory manipulation. - */ - -/* - * It appears that in NetBSD, lookup is supposed to return the vnode locked - */ -int -coda_lookup(v) - void *v; -{ -/* true args */ - struct vop_lookup_args *ap = v; - struct vnode *dvp = ap->a_dvp; - struct cnode *dcp = VTOC(dvp); - struct vnode **vpp = ap->a_vpp; - /* - * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest - * of the string to xlate, and that we must try to get at least - * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I - * could be wrong. - */ - struct componentname *cnp = ap->a_cnp; - struct ucred *cred = cnp->cn_cred; - struct proc *p = cnp->cn_proc; -/* locals */ - struct cnode *cp; - const char *nm = cnp->cn_nameptr; - int len = cnp->cn_namelen; - ViceFid VFid; - int vtype; - int error = 0; - - MARK_ENTRY(CODA_LOOKUP_STATS); - - CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n", - nm, dcp->c_fid.Volume, - dcp->c_fid.Vnode, dcp->c_fid.Unique));); - - /* Check for lookup of control object. */ - if (IS_CTL_NAME(dvp, nm, len)) { - *vpp = coda_ctlvp; - vref(*vpp); - MARK_INT_SAT(CODA_LOOKUP_STATS); - goto exit; - } - - if (len+1 > CODA_MAXNAMLEN) { - MARK_INT_FAIL(CODA_LOOKUP_STATS); - CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n", - dcp->c_fid.Volume, dcp->c_fid.Vnode, - dcp->c_fid.Unique, nm));); - *vpp = (struct vnode *)0; - error = EINVAL; - goto exit; - } - /* First try to look the file up in the cfs name cache */ - /* lock the parent vnode? */ - cp = coda_nc_lookup(dcp, nm, len, cred); - if (cp) { - *vpp = CTOV(cp); - vref(*vpp); - CODADEBUG(CODA_LOOKUP, - myprintf(("lookup result %d vpp %p\n",error,*vpp));) - } else { - - /* The name wasn't cached, so we need to contact Venus */ - error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, p, &VFid, &vtype); - - if (error) { - MARK_INT_FAIL(CODA_LOOKUP_STATS); - CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n", - dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));) - *vpp = (struct vnode *)0; - } else { - MARK_INT_SAT(CODA_LOOKUP_STATS); - CODADEBUG(CODA_LOOKUP, - myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n", - VFid.Volume, VFid.Vnode, VFid.Unique, vtype, - error)); ) - - cp = make_coda_node(&VFid, dvp->v_mount, vtype); - *vpp = CTOV(cp); - - /* enter the new vnode in the Name Cache only if the top bit isn't set */ - /* And don't enter a new vnode for an invalid one! */ - if (!(vtype & CODA_NOCACHE)) - coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); - } - } - - exit: - /* - * If we are creating, and this was the last name to be looked up, - * and the error was ENOENT, then there really shouldn't be an - * error and we can make the leaf NULL and return success. Since - * this is supposed to work under Mach as well as NetBSD, we're - * leaving this fn wrapped. We also must tell lookup/namei that - * we need to save the last component of the name. (Create will - * have to free the name buffer later...lucky us...) - */ - if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) - && (cnp->cn_flags & ISLASTCN) - && (error == ENOENT)) - { - error = EJUSTRETURN; - cnp->cn_flags |= SAVENAME; - *ap->a_vpp = NULL; - } - - /* - * If we are removing, and we are at the last element, and we - * found it, then we need to keep the name around so that the - * removal will go ahead as planned. Unfortunately, this will - * probably also lock the to-be-removed vnode, which may or may - * not be a good idea. I'll have to look at the bits of - * coda_remove to make sure. We'll only save the name if we did in - * fact find the name, otherwise coda_remove won't have a chance - * to free the pathname. - */ - if ((cnp->cn_nameiop == DELETE) - && (cnp->cn_flags & ISLASTCN) - && !error) - { - cnp->cn_flags |= SAVENAME; - } - - /* - * If the lookup went well, we need to (potentially?) unlock the - * parent, and lock the child. We are only responsible for - * checking to see if the parent is supposed to be unlocked before - * we return. We must always lock the child (provided there is - * one, and (the parent isn't locked or it isn't the same as the - * parent.) Simple, huh? We can never leave the parent locked unless - * we are ISLASTCN - */ - if (!error || (error == EJUSTRETURN)) { - if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) { - if ((error = VOP_UNLOCK(dvp, 0, p))) { - return error; - } - /* - * The parent is unlocked. As long as there is a child, - * lock it without bothering to check anything else. - */ - if (*ap->a_vpp) { - if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { - printf("coda_lookup: "); - panic("unlocked parent but couldn't lock child"); - } - } - } else { - /* The parent is locked, and may be the same as the child */ - if (*ap->a_vpp && (*ap->a_vpp != dvp)) { - /* Different, go ahead and lock it. */ - if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { - printf("coda_lookup: "); - panic("unlocked parent but couldn't lock child"); - } - } - } - } else { - /* If the lookup failed, we need to ensure that the leaf is NULL */ - /* Don't change any locking? */ - *ap->a_vpp = NULL; - } - return(error); -} - -/*ARGSUSED*/ -int -coda_create(v) - void *v; -{ -/* true args */ - struct vop_create_args *ap = v; - struct vnode *dvp = ap->a_dvp; - struct cnode *dcp = VTOC(dvp); - struct vattr *va = ap->a_vap; - int exclusive = 1; - int mode = ap->a_vap->va_mode; - struct vnode **vpp = ap->a_vpp; - struct componentname *cnp = ap->a_cnp; - struct ucred *cred = cnp->cn_cred; - struct proc *p = cnp->cn_proc; -/* locals */ - int error; - struct cnode *cp; - const char *nm = cnp->cn_nameptr; - int len = cnp->cn_namelen; - ViceFid VFid; - struct vattr attr; - - MARK_ENTRY(CODA_CREATE_STATS); - - /* All creates are exclusive XXX */ - /* I'm assuming the 'mode' argument is the file mode bits XXX */ - - /* Check for create of control object. */ - if (IS_CTL_NAME(dvp, nm, len)) { - *vpp = (struct vnode *)0; - MARK_INT_FAIL(CODA_CREATE_STATS); - return(EACCES); - } - - error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, p, &VFid, &attr); - - if (!error) { - - /* If this is an exclusive create, panic if the file already exists. */ - /* Venus should have detected the file and reported EEXIST. */ - - if ((exclusive == 1) && - (coda_find(&VFid) != NULL)) - panic("cnode existed for newly created file!"); - - cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); - *vpp = CTOV(cp); - - /* Update va to reflect the new attributes. */ - (*va) = attr; - - /* Update the attribute cache and mark it as valid */ - if (coda_attr_cache) { - VTOC(*vpp)->c_vattr = attr; - VTOC(*vpp)->c_flags |= C_VATTR; - } - - /* Invalidate the parent's attr cache, the modification time has changed */ - VTOC(dvp)->c_flags &= ~C_VATTR; - - /* enter the new vnode in the Name Cache */ - coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); - - CODADEBUG(CODA_CREATE, - myprintf(("create: (%lx.%lx.%lx), result %d\n", - VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) - } else { - *vpp = (struct vnode *)0; - CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));) - } - - if (!error) { - if (cnp->cn_flags & LOCKLEAF) { - if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { - printf("coda_create: "); - panic("unlocked parent but couldn't lock child"); - } - } -#ifdef DIAGNOSTIC - else { - printf("coda_create: LOCKLEAF not set!\n"); - } -#endif /* DIAGNOSTIC */ - } - /* Have to free the previously saved name */ - /* - * This condition is stolen from ufs_makeinode. I have no idea - * why it's here, but what the hey... - */ - if ((cnp->cn_flags & SAVESTART) == 0) { - zfree(namei_zone, cnp->cn_pnbuf); - } - return(error); -} - -int -coda_remove(v) - void *v; -{ -/* true args */ - struct vop_remove_args *ap = v; - struct vnode *dvp = ap->a_dvp; - struct cnode *cp = VTOC(dvp); - struct componentname *cnp = ap->a_cnp; - struct ucred *cred = cnp->cn_cred; - struct proc *p = cnp->cn_proc; -/* locals */ - int error; - const char *nm = cnp->cn_nameptr; - int len = cnp->cn_namelen; - struct cnode *tp; - - MARK_ENTRY(CODA_REMOVE_STATS); - - CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n", - nm, cp->c_fid.Volume, cp->c_fid.Vnode, - cp->c_fid.Unique));); - - /* Remove the file's entry from the CODA Name Cache */ - /* We're being conservative here, it might be that this person - * doesn't really have sufficient access to delete the file - * but we feel zapping the entry won't really hurt anyone -- dcs - */ - /* I'm gonna go out on a limb here. If a file and a hardlink to it - * exist, and one is removed, the link count on the other will be - * off by 1. We could either invalidate the attrs if cached, or - * fix them. I'll try to fix them. DCS 11/8/94 - */ - tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); - if (tp) { - if (VALID_VATTR(tp)) { /* If attrs are cached */ - if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ - tp->c_vattr.va_nlink--; - } - } - - coda_nc_zapfile(VTOC(dvp), nm, len); - /* No need to flush it if it doesn't exist! */ - } - /* Invalidate the parent's attr cache, the modification time has changed */ - VTOC(dvp)->c_flags &= ~C_VATTR; - - /* Check for remove of control object. */ - if (IS_CTL_NAME(dvp, nm, len)) { - MARK_INT_FAIL(CODA_REMOVE_STATS); - return(ENOENT); - } - - error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, p); - - CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) - - if ((cnp->cn_flags & SAVESTART) == 0) { - zfree(namei_zone, cnp->cn_pnbuf); - } - return(error); -} - -int -coda_link(v) - void *v; -{ -/* true args */ - struct vop_link_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - struct vnode *tdvp = ap->a_tdvp; - struct cnode *tdcp = VTOC(tdvp); - struct componentname *cnp = ap->a_cnp; - struct ucred *cred = cnp->cn_cred; - struct proc *p = cnp->cn_proc; -/* locals */ - int error; - const char *nm = cnp->cn_nameptr; - int len = cnp->cn_namelen; - - MARK_ENTRY(CODA_LINK_STATS); - - if (codadebug & CODADBGMSK(CODA_LINK)) { - - myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n", - cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); - myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n", - tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); - - } - if (codadebug & CODADBGMSK(CODA_LINK)) { - myprintf(("link: vp fid: (%lx.%lx.%lx)\n", - cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); - myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n", - tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); - - } - - /* Check for link to/from control object. */ - if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) { - MARK_INT_FAIL(CODA_LINK_STATS); - return(EACCES); - } - - error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, p); - - /* Invalidate the parent's attr cache, the modification time has changed */ - VTOC(tdvp)->c_flags &= ~C_VATTR; - VTOC(vp)->c_flags &= ~C_VATTR; - - CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) - -exit: - - /* Drop the name buffer if we don't need to SAVESTART */ - if ((cnp->cn_flags & SAVESTART) == 0) { - zfree(namei_zone, cnp->cn_pnbuf); - } - return(error); -} - -int -coda_rename(v) - void *v; -{ -/* true args */ - struct vop_rename_args *ap = v; - struct vnode *odvp = ap->a_fdvp; - struct cnode *odcp = VTOC(odvp); - struct componentname *fcnp = ap->a_fcnp; - struct vnode *ndvp = ap->a_tdvp; - struct cnode *ndcp = VTOC(ndvp); - struct componentname *tcnp = ap->a_tcnp; - struct ucred *cred = fcnp->cn_cred; - struct proc *p = fcnp->cn_proc; -/* true args */ - int error; - const char *fnm = fcnp->cn_nameptr; - int flen = fcnp->cn_namelen; - const char *tnm = tcnp->cn_nameptr; - int tlen = tcnp->cn_namelen; - - MARK_ENTRY(CODA_RENAME_STATS); - - /* Hmmm. The vnodes are already looked up. Perhaps they are locked? - This could be Bad. XXX */ -#ifdef DIAGNOSTIC - if ((fcnp->cn_cred != tcnp->cn_cred) - || (fcnp->cn_proc != tcnp->cn_proc)) - { - panic("coda_rename: component names don't agree"); - } -#endif DIAGNOSTIC - - /* Check for rename involving control object. */ - if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { - MARK_INT_FAIL(CODA_RENAME_STATS); - return(EACCES); - } - - /* Problem with moving directories -- need to flush entry for .. */ - if (odvp != ndvp) { - struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); - if (ovcp) { - struct vnode *ovp = CTOV(ovcp); - if ((ovp) && - (ovp->v_type == VDIR)) /* If it's a directory */ - coda_nc_zapfile(VTOC(ovp),"..", 2); - } - } - - /* Remove the entries for both source and target files */ - coda_nc_zapfile(VTOC(odvp), fnm, flen); - coda_nc_zapfile(VTOC(ndvp), tnm, tlen); - - /* Invalidate the parent's attr cache, the modification time has changed */ - VTOC(odvp)->c_flags &= ~C_VATTR; - VTOC(ndvp)->c_flags &= ~C_VATTR; - - if (flen+1 > CODA_MAXNAMLEN) { - MARK_INT_FAIL(CODA_RENAME_STATS); - error = EINVAL; - goto exit; - } - - if (tlen+1 > CODA_MAXNAMLEN) { - MARK_INT_FAIL(CODA_RENAME_STATS); - error = EINVAL; - goto exit; - } - - error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, p); - - exit: - CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) - /* XXX - do we need to call cache pureg on the moved vnode? */ - cache_purge(ap->a_fvp); - - /* It seems to be incumbent on us to drop locks on all four vnodes */ - /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ - - vrele(ap->a_fvp); - vrele(odvp); - - if (ap->a_tvp) { - if (ap->a_tvp == ndvp) { - vrele(ap->a_tvp); - } else { - vput(ap->a_tvp); - } - } - - vput(ndvp); - return(error); -} - -int -coda_mkdir(v) - void *v; -{ -/* true args */ - struct vop_mkdir_args *ap = v; - struct vnode *dvp = ap->a_dvp; - struct cnode *dcp = VTOC(dvp); - struct componentname *cnp = ap->a_cnp; - register struct vattr *va = ap->a_vap; - struct vnode **vpp = ap->a_vpp; - struct ucred *cred = cnp->cn_cred; - struct proc *p = cnp->cn_proc; -/* locals */ - int error; - const char *nm = cnp->cn_nameptr; - int len = cnp->cn_namelen; - struct cnode *cp; - ViceFid VFid; - struct vattr ova; - - MARK_ENTRY(CODA_MKDIR_STATS); - - /* Check for mkdir of target object. */ - if (IS_CTL_NAME(dvp, nm, len)) { - *vpp = (struct vnode *)0; - MARK_INT_FAIL(CODA_MKDIR_STATS); - return(EACCES); - } - - if (len+1 > CODA_MAXNAMLEN) { - *vpp = (struct vnode *)0; - MARK_INT_FAIL(CODA_MKDIR_STATS); - return(EACCES); - } - - error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, p, &VFid, &ova); - - if (!error) { - if (coda_find(&VFid) != NULL) - panic("cnode existed for newly created directory!"); - - - cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); - *vpp = CTOV(cp); - - /* enter the new vnode in the Name Cache */ - coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); - - /* as a side effect, enter "." and ".." for the directory */ - coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); - coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); - - if (coda_attr_cache) { - VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ - VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ - } - - /* Invalidate the parent's attr cache, the modification time has changed */ - VTOC(dvp)->c_flags &= ~C_VATTR; - - CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n", - VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) - } else { - *vpp = (struct vnode *)0; - CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));) - } - - /* Have to free the previously saved name */ - /* - * ufs_mkdir doesn't check for SAVESTART before freeing the - * pathname buffer, but ufs_create does. For the moment, I'll - * follow their lead, but this seems like it is probably - * incorrect. - */ - zfree(namei_zone, cnp->cn_pnbuf); - return(error); -} - -int -coda_rmdir(v) - void *v; -{ -/* true args */ - struct vop_rmdir_args *ap = v; - struct vnode *dvp = ap->a_dvp; - struct cnode *dcp = VTOC(dvp); - struct componentname *cnp = ap->a_cnp; - struct ucred *cred = cnp->cn_cred; - struct proc *p = cnp->cn_proc; -/* true args */ - int error; - const char *nm = cnp->cn_nameptr; - int len = cnp->cn_namelen; - struct cnode *cp; - - MARK_ENTRY(CODA_RMDIR_STATS); - - /* Check for rmdir of control object. */ - if (IS_CTL_NAME(dvp, nm, len)) { - MARK_INT_FAIL(CODA_RMDIR_STATS); - return(ENOENT); - } - - /* We're being conservative here, it might be that this person - * doesn't really have sufficient access to delete the file - * but we feel zapping the entry won't really hurt anyone -- dcs - */ - /* - * As a side effect of the rmdir, remove any entries for children of - * the directory, especially "." and "..". - */ - cp = coda_nc_lookup(dcp, nm, len, cred); - if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); - - /* Remove the file's entry from the CODA Name Cache */ - coda_nc_zapfile(dcp, nm, len); - - /* Invalidate the parent's attr cache, the modification time has changed */ - dcp->c_flags &= ~C_VATTR; - - error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, p); - - CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) - - if ((cnp->cn_flags & SAVESTART) == 0) { - zfree(namei_zone, cnp->cn_pnbuf); - } - return(error); -} - -int -coda_symlink(v) - void *v; -{ -/* true args */ - struct vop_symlink_args *ap = v; - struct vnode *tdvp = ap->a_dvp; - struct cnode *tdcp = VTOC(tdvp); - struct componentname *cnp = ap->a_cnp; - struct vattr *tva = ap->a_vap; - char *path = ap->a_target; - struct ucred *cred = cnp->cn_cred; - struct proc *p = cnp->cn_proc; -/* locals */ - int error; - /* - * XXX I'm assuming the following things about coda_symlink's - * arguments: - * t(foo) is the new name/parent/etc being created. - * lname is the contents of the new symlink. - */ - char *nm = cnp->cn_nameptr; - int len = cnp->cn_namelen; - int plen = strlen(path); - - /* XXX What about the vpp argument? Do we need it? */ - /* - * Here's the strategy for the moment: perform the symlink, then - * do a lookup to grab the resulting vnode. I know this requires - * two communications with Venus for a new sybolic link, but - * that's the way the ball bounces. I don't yet want to change - * the way the Mach symlink works. When Mach support is - * deprecated, we should change symlink so that the common case - * returns the resultant vnode in a vpp argument. - */ - - MARK_ENTRY(CODA_SYMLINK_STATS); - - /* Check for symlink of control object. */ - if (IS_CTL_NAME(tdvp, nm, len)) { - MARK_INT_FAIL(CODA_SYMLINK_STATS); - return(EACCES); - } - - if (plen+1 > CODA_MAXPATHLEN) { - MARK_INT_FAIL(CODA_SYMLINK_STATS); - return(EINVAL); - } - - if (len+1 > CODA_MAXNAMLEN) { - MARK_INT_FAIL(CODA_SYMLINK_STATS); - error = EINVAL; - goto exit; - } - - error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, p); - - /* Invalidate the parent's attr cache, the modification time has changed */ - tdcp->c_flags &= ~C_VATTR; - - /* - * Free the name buffer - */ - if ((cnp->cn_flags & SAVESTART) == 0) { - zfree(namei_zone, cnp->cn_pnbuf); - } - - exit: - CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) - return(error); -} - -/* - * Read directory entries. - */ -int -coda_readdir(v) - void *v; -{ -/* true args */ - struct vop_readdir_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - register struct uio *uiop = ap->a_uio; - struct ucred *cred = ap->a_cred; - int *eofflag = ap->a_eofflag; - u_long **cookies = ap->a_cookies; - int *ncookies = ap->a_ncookies; - struct proc *p = ap->a_uio->uio_procp; -/* upcall decl */ -/* locals */ - int error = 0; - - MARK_ENTRY(CODA_READDIR_STATS); - - CODADEBUG(CODA_READDIR, myprintf(("coda_readdir(%p, %d, %qd, %d)\n", uiop->uio_iov->iov_base, uiop->uio_resid, uiop->uio_offset, uiop->uio_segflg)); ) - - /* Check for readdir of control object. */ - if (IS_CTL_VP(vp)) { - MARK_INT_FAIL(CODA_READDIR_STATS); - return(ENOENT); - } - - { - /* If directory is not already open do an "internal open" on it. */ - int opened_internally = 0; - if (cp->c_ovp == NULL) { - opened_internally = 1; - MARK_INT_GEN(CODA_OPEN_STATS); - error = VOP_OPEN(vp, FREAD, cred, p); -printf("coda_readdir: Internally Opening %p\n", vp); - if (error) { - printf("coda_readdir: VOP_OPEN on container failed %d\n", error); - return (error); - } - if (vp->v_type == VREG) { - error = vfs_object_create(vp, p, cred, 1); - if (error != 0) { - printf("coda_readdir: vfs_object_create() returns %d\n", error); - vput(vp); - } - } - if (error) return(error); - } - - /* Have UFS handle the call. */ - CODADEBUG(CODA_READDIR, myprintf(("indirect readdir: fid = (%lx.%lx.%lx), refcnt = %d\n",cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique, vp->v_usecount)); ) - error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, ncookies, - cookies); - - if (error) - MARK_INT_FAIL(CODA_READDIR_STATS); - else - MARK_INT_SAT(CODA_READDIR_STATS); - - /* Do an "internal close" if necessary. */ - if (opened_internally) { - MARK_INT_GEN(CODA_CLOSE_STATS); - (void)VOP_CLOSE(vp, FREAD, cred, p); - } - } - - return(error); -} - -/* - * Convert from file system blocks to device blocks - */ -int -coda_bmap(v) - void *v; -{ - /* XXX on the global proc */ -/* true args */ - struct vop_bmap_args *ap = v; - struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */ - daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */ - struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */ - daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */ - struct proc *p __attribute__((unused)) = curproc; -/* upcall decl */ -/* locals */ - - int ret = 0; - struct cnode *cp; - - cp = VTOC(vp); - if (cp->c_ovp) { - printf("coda_bmap: container .. "); - ret = VOP_BMAP(cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb); - printf("VOP_BMAP(cp->c_ovp %p, bn %p, vpp %p, bnp %p, ap->a_runp %p, ap->a_runb %p) = %d\n", - cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb, ret); - return ret; - } else { - printf("coda_bmap: no container\n"); - return(EOPNOTSUPP); - } -} - -/* - * I don't think the following two things are used anywhere, so I've - * commented them out - * - * struct buf *async_bufhead; - * int async_daemon_count; - */ -int -coda_strategy(v) - void *v; -{ -/* true args */ - struct vop_strategy_args *ap = v; - register struct buf *bp __attribute__((unused)) = ap->a_bp; - struct proc *p __attribute__((unused)) = curproc; -/* upcall decl */ -/* locals */ - - printf("coda_strategy: called ???\n"); - return(EOPNOTSUPP); -} - -int -coda_reclaim(v) - void *v; -{ -/* true args */ - struct vop_reclaim_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); -/* upcall decl */ -/* locals */ - -/* - * Forced unmount/flush will let vnodes with non zero use be destroyed! - */ - ENTRY; - - if (IS_UNMOUNTING(cp)) { -#ifdef DEBUG - if (VTOC(vp)->c_ovp) { - if (IS_UNMOUNTING(cp)) - printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp); - } -#endif - } else { -#ifdef DIAGNOSTIC - if (vp->v_usecount != 0) - vprint("coda_reclaim: pushing active", vp); - if (VTOC(vp)->c_ovp) { - panic("coda_reclaim: c_ovp not void"); - } -#endif DIAGNOSTIC - } - cache_purge(vp); - coda_free(VTOC(vp)); - VTOC(vp) = NULL; - return (0); -} - -int -coda_lock(v) - void *v; -{ -/* true args */ - struct vop_lock_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - struct proc *p = ap->a_p; -/* upcall decl */ -/* locals */ - - ENTRY; - - if (coda_lockdebug) { - myprintf(("Attempting lock on %lx.%lx.%lx\n", - cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); - } - - return (lockmgr(&cp->c_lock, ap->a_flags, &vp->v_interlock, p)); -} - -int -coda_unlock(v) - void *v; -{ -/* true args */ - struct vop_unlock_args *ap = v; - struct vnode *vp = ap->a_vp; - struct cnode *cp = VTOC(vp); - struct proc *p = ap->a_p; -/* upcall decl */ -/* locals */ - - ENTRY; - if (coda_lockdebug) { - myprintf(("Attempting unlock on %lx.%lx.%lx\n", - cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); - } - - return (lockmgr(&cp->c_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock, p)); -} - -int -coda_islocked(v) - void *v; -{ -/* true args */ - struct vop_islocked_args *ap = v; - struct cnode *cp = VTOC(ap->a_vp); - ENTRY; - - return (lockstatus(&cp->c_lock)); -} - -/* How one looks up a vnode given a device/inode pair: */ -int -coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp) -{ - /* This is like VFS_VGET() or igetinode()! */ - int error; - struct mount *mp; - - if (!(mp = devtomp(dev))) { - myprintf(("coda_grab_vnode: devtomp(%d) returns NULL\n", dev)); - return(ENXIO); - } - - /* XXX - ensure that nonzero-return means failure */ - error = VFS_VGET(mp,ino,vpp); - if (error) { - myprintf(("coda_grab_vnode: iget/vget(%d, %d) returns %p, err %d\n", - dev, ino, *vpp, error)); - return(ENOENT); - } - return(0); -} - -void -print_vattr( attr ) - struct vattr *attr; -{ - char *typestr; - - switch (attr->va_type) { - case VNON: - typestr = "VNON"; - break; - case VREG: - typestr = "VREG"; - break; - case VDIR: - typestr = "VDIR"; - break; - case VBLK: - typestr = "VBLK"; - break; - case VCHR: - typestr = "VCHR"; - break; - case VLNK: - typestr = "VLNK"; - break; - case VSOCK: - typestr = "VSCK"; - break; - case VFIFO: - typestr = "VFFO"; - break; - case VBAD: - typestr = "VBAD"; - break; - default: - typestr = "????"; - break; - } - - - myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", - typestr, (int)attr->va_mode, (int)attr->va_uid, - (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); - - myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", - (int)attr->va_fileid, (int)attr->va_nlink, - (int)attr->va_size, - (int)attr->va_blocksize,(int)attr->va_bytes)); - myprintf((" gen %ld flags %ld vaflags %d\n", - attr->va_gen, attr->va_flags, attr->va_vaflags)); - myprintf((" atime sec %d nsec %d\n", - (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); - myprintf((" mtime sec %d nsec %d\n", - (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); - myprintf((" ctime sec %d nsec %d\n", - (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); -} - -/* How to print a ucred */ -void -print_cred(cred) - struct ucred *cred; -{ - - int i; - - myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid)); - - for (i=0; i < cred->cr_ngroups; i++) - myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i])); - myprintf(("\n")); - -} - -/* - * Return a vnode for the given fid. - * If no cnode exists for this fid create one and put it - * in a table hashed by fid.Volume and fid.Vnode. If the cnode for - * this fid is already in the table return it (ref count is - * incremented by coda_find. The cnode will be flushed from the - * table when coda_inactive calls coda_unsave. - */ -struct cnode * -make_coda_node(fid, vfsp, type) - ViceFid *fid; struct mount *vfsp; short type; -{ - struct cnode *cp; - int err; - - if ((cp = coda_find(fid)) == NULL) { - struct vnode *vp; - - cp = coda_alloc(); - lockinit(&cp->c_lock, PINOD, "cnode", 0, 0); - cp->c_fid = *fid; - - err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp); - if (err) { - panic("coda: getnewvnode returned error %d\n", err); - } - vp->v_data = cp; - vp->v_type = type; - cp->c_vnode = vp; - coda_save(cp); - - } else { - vref(CTOV(cp)); - } - - return cp; -} |