coda_vnops.c revision 76166
138625Srvb/* 238759Srvb * 338759Srvb * Coda: an Experimental Distributed File System 438759Srvb * Release 3.1 538759Srvb * 638759Srvb * Copyright (c) 1987-1998 Carnegie Mellon University 738759Srvb * All Rights Reserved 838759Srvb * 938759Srvb * Permission to use, copy, modify and distribute this software and its 1038759Srvb * documentation is hereby granted, provided that both the copyright 1138759Srvb * notice and this permission notice appear in all copies of the 1238759Srvb * software, derivative works or modified versions, and any portions 1338759Srvb * thereof, and that both notices appear in supporting documentation, and 1438759Srvb * that credit is given to Carnegie Mellon University in all documents 1538759Srvb * and publicity pertaining to direct or indirect use of this code or its 1638759Srvb * derivatives. 1738759Srvb * 1838759Srvb * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, 1938759Srvb * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS 2038759Srvb * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON 2138759Srvb * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER 2238759Srvb * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF 2338759Srvb * ANY DERIVATIVE WORK. 2438759Srvb * 2538759Srvb * Carnegie Mellon encourages users of this software to return any 2638759Srvb * improvements or extensions that they make, and to grant Carnegie 2738759Srvb * Mellon the rights to redistribute these changes without encumbrance. 2838759Srvb * 2939126Srvb * @(#) src/sys/coda/coda_vnops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ 3050477Speter * $FreeBSD: head/sys/fs/coda/coda_vnops.c 76166 2001-05-01 08:13:21Z markm $ 3138759Srvb * 3238759Srvb */ 3338625Srvb 3438625Srvb/* 3538625Srvb * Mach Operating System 3638625Srvb * Copyright (c) 1990 Carnegie-Mellon University 3738625Srvb * Copyright (c) 1989 Carnegie-Mellon University 3838625Srvb * All rights reserved. The CMU software License Agreement specifies 3938625Srvb * the terms and conditions for use and redistribution. 4038625Srvb */ 4138625Srvb 4238625Srvb/* 4338625Srvb * This code was written for the Coda file system at Carnegie Mellon 4438625Srvb * University. Contributers include David Steere, James Kistler, and 4538625Srvb * M. Satyanarayanan. 4638625Srvb */ 4738625Srvb 4838625Srvb#include <sys/param.h> 4938625Srvb#include <sys/systm.h> 5076166Smarkm#include <sys/acct.h> 5176166Smarkm#include <sys/errno.h> 5276166Smarkm#include <sys/fcntl.h> 5338759Srvb#include <sys/kernel.h> 5476166Smarkm#include <sys/lock.h> 5576166Smarkm#include <sys/malloc.h> 5676166Smarkm#include <sys/file.h> /* Must come after sys/malloc.h */ 5776166Smarkm#include <sys/mount.h> 5876166Smarkm#include <sys/mutex.h> 5976166Smarkm#include <sys/namei.h> 6038759Srvb#include <sys/proc.h> 6175877Smjacob#include <sys/socket.h> 6238625Srvb#include <sys/uio.h> 6338759Srvb 6438625Srvb#include <vm/vm.h> 6538625Srvb#include <vm/vm_object.h> 6638625Srvb#include <vm/vm_extern.h> 6738625Srvb 6839126Srvb#include <coda/coda.h> 6939126Srvb#include <coda/cnode.h> 7039126Srvb#include <coda/coda_vnops.h> 7139126Srvb#include <coda/coda_venus.h> 7239126Srvb#include <coda/coda_opstats.h> 7339126Srvb#include <coda/coda_subr.h> 7439126Srvb#include <coda/coda_namecache.h> 7539126Srvb#include <coda/coda_pioctl.h> 7638625Srvb 7738625Srvb/* 7838625Srvb * These flags select various performance enhancements. 7938625Srvb */ 8039085Srvbint coda_attr_cache = 1; /* Set to cache attributes in the kernel */ 8139085Srvbint coda_symlink_cache = 1; /* Set to cache symbolic link information */ 8239085Srvbint coda_access_cache = 1; /* Set to handle some access checks directly */ 8338625Srvb 8438625Srvb/* structure to keep track of vfs calls */ 8538625Srvb 8639085Srvbstruct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE]; 8738625Srvb 8839085Srvb#define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++) 8939085Srvb#define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++) 9039085Srvb#define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++) 9139085Srvb#define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++) 9238625Srvb 9338625Srvb/* What we are delaying for in printf */ 9439085Srvbint coda_printf_delay = 0; /* in microseconds */ 9539085Srvbint coda_vnop_print_entry = 0; 9639085Srvbstatic int coda_lockdebug = 0; 9738625Srvb 9838625Srvb/* Definition of the vfs operation vector */ 9938625Srvb 10038625Srvb/* 10138625Srvb * Some NetBSD details: 10238625Srvb * 10339085Srvb * coda_start is called at the end of the mount syscall. 10439085Srvb * coda_init is called at boot time. 10538625Srvb */ 10638625Srvb 10739085Srvb#define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__FUNCTION__)) 10838625Srvb 10938625Srvb/* Definition of the vnode operation vector */ 11038625Srvb 11139085Srvbstruct vnodeopv_entry_desc coda_vnodeop_entries[] = { 11239085Srvb { &vop_default_desc, coda_vop_error }, 11339085Srvb { &vop_lookup_desc, coda_lookup }, /* lookup */ 11439085Srvb { &vop_create_desc, coda_create }, /* create */ 11539650Srvb { &vop_mknod_desc, coda_vop_error }, /* mknod */ 11639085Srvb { &vop_open_desc, coda_open }, /* open */ 11739085Srvb { &vop_close_desc, coda_close }, /* close */ 11839085Srvb { &vop_access_desc, coda_access }, /* access */ 11939650Srvb { &vop_getattr_desc, coda_getattr }, /* getattr */ 12039650Srvb { &vop_setattr_desc, coda_setattr }, /* setattr */ 12139085Srvb { &vop_read_desc, coda_read }, /* read */ 12239085Srvb { &vop_write_desc, coda_write }, /* write */ 12339085Srvb { &vop_ioctl_desc, coda_ioctl }, /* ioctl */ 12439085Srvb { &vop_fsync_desc, coda_fsync }, /* fsync */ 12539085Srvb { &vop_remove_desc, coda_remove }, /* remove */ 12639085Srvb { &vop_link_desc, coda_link }, /* link */ 12739085Srvb { &vop_rename_desc, coda_rename }, /* rename */ 12839085Srvb { &vop_mkdir_desc, coda_mkdir }, /* mkdir */ 12939085Srvb { &vop_rmdir_desc, coda_rmdir }, /* rmdir */ 13039650Srvb { &vop_symlink_desc, coda_symlink }, /* symlink */ 13139650Srvb { &vop_readdir_desc, coda_readdir }, /* readdir */ 13239085Srvb { &vop_readlink_desc, coda_readlink }, /* readlink */ 13339085Srvb { &vop_inactive_desc, coda_inactive }, /* inactive */ 13439650Srvb { &vop_reclaim_desc, coda_reclaim }, /* reclaim */ 13539085Srvb { &vop_lock_desc, coda_lock }, /* lock */ 13639085Srvb { &vop_unlock_desc, coda_unlock }, /* unlock */ 13739085Srvb { &vop_bmap_desc, coda_bmap }, /* bmap */ 13839085Srvb { &vop_strategy_desc, coda_strategy }, /* strategy */ 13939650Srvb { &vop_print_desc, coda_vop_error }, /* print */ 14039085Srvb { &vop_islocked_desc, coda_islocked }, /* islocked */ 14139650Srvb { &vop_pathconf_desc, coda_vop_error }, /* pathconf */ 14239650Srvb { &vop_advlock_desc, coda_vop_nop }, /* advlock */ 14339650Srvb { &vop_lease_desc, coda_vop_nop }, /* lease */ 14438759Srvb { &vop_poll_desc, (vop_t *) vop_stdpoll }, 14539085Srvb { &vop_getpages_desc, coda_fbsd_getpages }, /* pager intf.*/ 14639085Srvb { &vop_putpages_desc, coda_fbsd_putpages }, /* pager intf.*/ 14738625Srvb 14838759Srvb#if 0 14938625Srvb 15038759Srvb we need to define these someday 15138625Srvb#define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd) 15238625Srvb#define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd) 15338625Srvb#define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc) 15438625Srvb#define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee) 15542374Sbde#define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb) 15638625Srvb 15738625Srvb missing 15838625Srvb { &vop_reallocblks_desc, (vop_t *) ufs_missingop }, 15938625Srvb { &vop_cachedlookup_desc, (vop_t *) ufs_lookup }, 16038625Srvb { &vop_whiteout_desc, (vop_t *) ufs_whiteout }, 16138625Srvb#endif 16238625Srvb { (struct vnodeop_desc*)NULL, (int(*)(void *))NULL } 16338625Srvb}; 16438625Srvb 16539085Srvbstatic struct vnodeopv_desc coda_vnodeop_opv_desc = 16639085Srvb { &coda_vnodeop_p, coda_vnodeop_entries }; 16738625Srvb 16839085SrvbVNODEOP_SET(coda_vnodeop_opv_desc); 16938625Srvb 17038625Srvb/* A generic panic: we were called with something we didn't define yet */ 17138625Srvbint 17239085Srvbcoda_vop_error(void *anon) { 17338625Srvb struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 17438625Srvb 17541202Srvb myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n", 17638625Srvb (*desc)->vdesc_name)); 17741202Srvb /* 17839085Srvb panic("coda_vop_error"); 17941202Srvb */ 18041202Srvb return EIO; 18138625Srvb} 18238625Srvb 18338625Srvb/* A generic do-nothing. For lease_check, advlock */ 18438625Srvbint 18539085Srvbcoda_vop_nop(void *anon) { 18638625Srvb struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 18738625Srvb 18839085Srvb if (codadebug) { 18938625Srvb myprintf(("Vnode operation %s called, but unsupported\n", 19038625Srvb (*desc)->vdesc_name)); 19138625Srvb } 19238625Srvb return (0); 19338625Srvb} 19438625Srvb 19538625Srvbint 19639085Srvbcoda_vnodeopstats_init(void) 19738625Srvb{ 19838625Srvb register int i; 19938625Srvb 20039085Srvb for(i=0;i<CODA_VNODEOPS_SIZE;i++) { 20139085Srvb coda_vnodeopstats[i].opcode = i; 20239085Srvb coda_vnodeopstats[i].entries = 0; 20339085Srvb coda_vnodeopstats[i].sat_intrn = 0; 20439085Srvb coda_vnodeopstats[i].unsat_intrn = 0; 20539085Srvb coda_vnodeopstats[i].gen_intrn = 0; 20638625Srvb } 20738625Srvb return 0; 20838625Srvb} 20938625Srvb 21038625Srvb/* 21139085Srvb * coda_open calls Venus to return the device, inode pair of the cache 21239085Srvb * file holding the data. Using iget, coda_open finds the vnode of the 21338625Srvb * cache file, and then opens it. 21438625Srvb */ 21538625Srvbint 21639085Srvbcoda_open(v) 21738625Srvb void *v; 21838625Srvb{ 21938625Srvb /* 22038625Srvb * NetBSD can pass the O_EXCL flag in mode, even though the check 22138625Srvb * has already happened. Venus defensively assumes that if open 22238625Srvb * is passed the EXCL, it must be a bug. We strip the flag here. 22338625Srvb */ 22438625Srvb/* true args */ 22538625Srvb struct vop_open_args *ap = v; 22638625Srvb register struct vnode **vpp = &(ap->a_vp); 22738625Srvb struct cnode *cp = VTOC(*vpp); 22838625Srvb int flag = ap->a_mode & (~O_EXCL); 22938625Srvb struct ucred *cred = ap->a_cred; 23038625Srvb struct proc *p = ap->a_p; 23138625Srvb/* locals */ 23238625Srvb int error; 23338625Srvb struct vnode *vp; 23438625Srvb dev_t dev; 23538625Srvb ino_t inode; 23638625Srvb 23739085Srvb MARK_ENTRY(CODA_OPEN_STATS); 23838625Srvb 23938625Srvb /* Check for open of control file. */ 24038625Srvb if (IS_CTL_VP(*vpp)) { 24138625Srvb /* XXX */ 24238625Srvb /* if (WRITEABLE(flag)) */ 24338625Srvb if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) { 24439085Srvb MARK_INT_FAIL(CODA_OPEN_STATS); 24538625Srvb return(EACCES); 24638625Srvb } 24739085Srvb MARK_INT_SAT(CODA_OPEN_STATS); 24838625Srvb return(0); 24938625Srvb } 25038625Srvb 25138625Srvb error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, p, &dev, &inode); 25238625Srvb if (error) 25338625Srvb return (error); 25438625Srvb if (!error) { 25549524Sbde CODADEBUG( CODA_OPEN,myprintf(("open: dev %#lx inode %lu result %d\n", 25649524Sbde (u_long)dev2udev(dev), (u_long)inode, 25749524Sbde error)); ) 25838625Srvb } 25938625Srvb 26038625Srvb /* Translate the <device, inode> pair for the cache file into 26138625Srvb an inode pointer. */ 26239085Srvb error = coda_grab_vnode(dev, inode, &vp); 26338625Srvb if (error) 26438625Srvb return (error); 26538625Srvb 26638759Srvb /* We get the vnode back locked. Needs unlocked */ 26738759Srvb VOP_UNLOCK(vp, 0, p); 26838625Srvb /* Keep a reference until the close comes in. */ 26938625Srvb vref(*vpp); 27038625Srvb 27138625Srvb /* Save the vnode pointer for the cache file. */ 27238625Srvb if (cp->c_ovp == NULL) { 27338625Srvb cp->c_ovp = vp; 27438625Srvb } else { 27538625Srvb if (cp->c_ovp != vp) 27639085Srvb panic("coda_open: cp->c_ovp != ITOV(ip)"); 27738625Srvb } 27838625Srvb cp->c_ocount++; 27938625Srvb 28038625Srvb /* Flush the attribute cached if writing the file. */ 28138625Srvb if (flag & FWRITE) { 28238625Srvb cp->c_owrite++; 28338625Srvb cp->c_flags &= ~C_VATTR; 28438625Srvb } 28538625Srvb 28638625Srvb /* Save the <device, inode> pair for the cache file to speed 28738625Srvb up subsequent page_read's. */ 28838625Srvb cp->c_device = dev; 28938625Srvb cp->c_inode = inode; 29038625Srvb 29138625Srvb /* Open the cache file. */ 29238625Srvb error = VOP_OPEN(vp, flag, cred, p); 29338625Srvb if (error) { 29439085Srvb printf("coda_open: VOP_OPEN on container failed %d\n", error); 29538625Srvb return (error); 29638625Srvb } 29739650Srvb/* grab (above) does this when it calls newvnode unless it's in the cache*/ 29838625Srvb if (vp->v_type == VREG) { 29942315Seivind error = vfs_object_create(vp, p, cred); 30038625Srvb if (error != 0) { 30139085Srvb printf("coda_open: vfs_object_create() returns %d\n", error); 30238625Srvb vput(vp); 30338625Srvb } 30438625Srvb } 30539650Srvb 30638625Srvb return(error); 30738625Srvb} 30838625Srvb 30938625Srvb/* 31038625Srvb * Close the cache file used for I/O and notify Venus. 31138625Srvb */ 31238625Srvbint 31339085Srvbcoda_close(v) 31438625Srvb void *v; 31538625Srvb{ 31638625Srvb/* true args */ 31738625Srvb struct vop_close_args *ap = v; 31838625Srvb struct vnode *vp = ap->a_vp; 31938625Srvb struct cnode *cp = VTOC(vp); 32038625Srvb int flag = ap->a_fflag; 32138625Srvb struct ucred *cred = ap->a_cred; 32238625Srvb struct proc *p = ap->a_p; 32338625Srvb/* locals */ 32438625Srvb int error; 32538625Srvb 32639085Srvb MARK_ENTRY(CODA_CLOSE_STATS); 32738625Srvb 32838625Srvb /* Check for close of control file. */ 32938625Srvb if (IS_CTL_VP(vp)) { 33039085Srvb MARK_INT_SAT(CODA_CLOSE_STATS); 33138625Srvb return(0); 33238625Srvb } 33338625Srvb 33438625Srvb if (IS_UNMOUNTING(cp)) { 33538625Srvb if (cp->c_ovp) { 33639728Srvb#ifdef CODA_VERBOSE 33739085Srvb printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n", 33838625Srvb vp->v_usecount, cp->c_ovp, vp, cp); 33939650Srvb#endif 34040708Srvb#ifdef hmm 34138625Srvb vgone(cp->c_ovp); 34240708Srvb#else 34340708Srvb VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 34440708Srvb vrele(cp->c_ovp); 34540708Srvb#endif 34638625Srvb } else { 34739728Srvb#ifdef CODA_VERBOSE 34839085Srvb printf("coda_close: NO container vp %p/cp %p\n", vp, cp); 34939650Srvb#endif 35038625Srvb } 35138625Srvb return ENODEV; 35238625Srvb } else { 35338625Srvb VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 35438625Srvb vrele(cp->c_ovp); 35538625Srvb } 35638625Srvb 35738625Srvb if (--cp->c_ocount == 0) 35838625Srvb cp->c_ovp = NULL; 35938625Srvb 36038625Srvb if (flag & FWRITE) /* file was opened for write */ 36138625Srvb --cp->c_owrite; 36238625Srvb 36338625Srvb error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, p); 36438625Srvb vrele(CTOV(cp)); 36538625Srvb 36639085Srvb CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); ) 36738625Srvb return(error); 36838625Srvb} 36938625Srvb 37038625Srvbint 37139085Srvbcoda_read(v) 37238625Srvb void *v; 37338625Srvb{ 37438625Srvb struct vop_read_args *ap = v; 37538625Srvb 37638625Srvb ENTRY; 37739085Srvb return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ, 37838625Srvb ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 37938625Srvb} 38038625Srvb 38138625Srvbint 38239085Srvbcoda_write(v) 38338625Srvb void *v; 38438625Srvb{ 38538625Srvb struct vop_write_args *ap = v; 38638625Srvb 38738625Srvb ENTRY; 38839085Srvb return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE, 38938625Srvb ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 39038625Srvb} 39138625Srvb 39238625Srvbint 39339085Srvbcoda_rdwr(vp, uiop, rw, ioflag, cred, p) 39438625Srvb struct vnode *vp; 39538625Srvb struct uio *uiop; 39638625Srvb enum uio_rw rw; 39738625Srvb int ioflag; 39838625Srvb struct ucred *cred; 39938625Srvb struct proc *p; 40038625Srvb{ 40138625Srvb/* upcall decl */ 40238625Srvb /* NOTE: container file operation!!! */ 40338625Srvb/* locals */ 40438625Srvb struct cnode *cp = VTOC(vp); 40538625Srvb struct vnode *cfvp = cp->c_ovp; 40638625Srvb int igot_internally = 0; 40738625Srvb int opened_internally = 0; 40838625Srvb int error = 0; 40938625Srvb 41039085Srvb MARK_ENTRY(CODA_RDWR_STATS); 41138625Srvb 41249524Sbde CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %d, %lld, %d)\n", rw, 41349524Sbde (void *)uiop->uio_iov->iov_base, uiop->uio_resid, 41449524Sbde (long long)uiop->uio_offset, uiop->uio_segflg)); ) 41538625Srvb 41638625Srvb /* Check for rdwr of control object. */ 41738625Srvb if (IS_CTL_VP(vp)) { 41839085Srvb MARK_INT_FAIL(CODA_RDWR_STATS); 41938625Srvb return(EINVAL); 42038625Srvb } 42138625Srvb 42238625Srvb /* 42338625Srvb * If file is not already open this must be a page 42438625Srvb * {read,write} request. Iget the cache file's inode 42538625Srvb * pointer if we still have its <device, inode> pair. 42638625Srvb * Otherwise, we must do an internal open to derive the 42738625Srvb * pair. 42838625Srvb */ 42938625Srvb if (cfvp == NULL) { 43038625Srvb /* 43138625Srvb * If we're dumping core, do the internal open. Otherwise 43238625Srvb * venus won't have the correct size of the core when 43338625Srvb * it's completely written. 43438625Srvb */ 43569652Sjhb PROC_LOCK(p); 43638625Srvb if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 43769652Sjhb PROC_UNLOCK(p); 43838625Srvb igot_internally = 1; 43939085Srvb error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp); 44038625Srvb if (error) { 44139085Srvb MARK_INT_FAIL(CODA_RDWR_STATS); 44238625Srvb return(error); 44338625Srvb } 44438625Srvb /* 44538625Srvb * We get the vnode back locked in both Mach and 44638625Srvb * NetBSD. Needs unlocked 44738625Srvb */ 44838759Srvb VOP_UNLOCK(cfvp, 0, p); 44938625Srvb } 45038625Srvb else { 45169652Sjhb PROC_UNLOCK(p); 45238625Srvb opened_internally = 1; 45339085Srvb MARK_INT_GEN(CODA_OPEN_STATS); 45438625Srvb error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), 45538625Srvb cred, p); 45639085Srvbprintf("coda_rdwr: Internally Opening %p\n", vp); 45738625Srvb if (error) { 45839085Srvb printf("coda_rdwr: VOP_OPEN on container failed %d\n", error); 45938625Srvb return (error); 46038625Srvb } 46138625Srvb if (vp->v_type == VREG) { 46242315Seivind error = vfs_object_create(vp, p, cred); 46338625Srvb if (error != 0) { 46439085Srvb printf("coda_rdwr: vfs_object_create() returns %d\n", error); 46538625Srvb vput(vp); 46638625Srvb } 46738625Srvb } 46838625Srvb if (error) { 46939085Srvb MARK_INT_FAIL(CODA_RDWR_STATS); 47038625Srvb return(error); 47138625Srvb } 47238625Srvb cfvp = cp->c_ovp; 47338625Srvb } 47438625Srvb } 47538625Srvb 47638625Srvb /* Have UFS handle the call. */ 47739085Srvb CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n", 47838625Srvb cp->c_fid.Volume, cp->c_fid.Vnode, 47938625Srvb cp->c_fid.Unique, CTOV(cp)->v_usecount)); ) 48038625Srvb 48139650Srvb 48238625Srvb if (rw == UIO_READ) { 48338625Srvb error = VOP_READ(cfvp, uiop, ioflag, cred); 48438625Srvb } else { 48538625Srvb error = VOP_WRITE(cfvp, uiop, ioflag, cred); 48638625Srvb /* ufs_write updates the vnode_pager_setsize for the vnode/object */ 48739650Srvb 48838625Srvb { struct vattr attr; 48938625Srvb 49038625Srvb if (VOP_GETATTR(cfvp, &attr, cred, p) == 0) { 49138625Srvb vnode_pager_setsize(vp, attr.va_size); 49238625Srvb } 49338625Srvb } 49438625Srvb } 49538625Srvb 49638625Srvb if (error) 49739085Srvb MARK_INT_FAIL(CODA_RDWR_STATS); 49838625Srvb else 49939085Srvb MARK_INT_SAT(CODA_RDWR_STATS); 50038625Srvb 50138625Srvb /* Do an internal close if necessary. */ 50238625Srvb if (opened_internally) { 50339085Srvb MARK_INT_GEN(CODA_CLOSE_STATS); 50438625Srvb (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, p); 50538625Srvb } 50638625Srvb 50738625Srvb /* Invalidate cached attributes if writing. */ 50838625Srvb if (rw == UIO_WRITE) 50938625Srvb cp->c_flags &= ~C_VATTR; 51038625Srvb return(error); 51138625Srvb} 51238625Srvb 51338625Srvbint 51439085Srvbcoda_ioctl(v) 51538625Srvb void *v; 51638625Srvb{ 51738625Srvb/* true args */ 51838625Srvb struct vop_ioctl_args *ap = v; 51938625Srvb struct vnode *vp = ap->a_vp; 52038625Srvb int com = ap->a_command; 52138625Srvb caddr_t data = ap->a_data; 52238625Srvb int flag = ap->a_fflag; 52338625Srvb struct ucred *cred = ap->a_cred; 52438625Srvb struct proc *p = ap->a_p; 52538625Srvb/* locals */ 52638625Srvb int error; 52738625Srvb struct vnode *tvp; 52838625Srvb struct nameidata ndp; 52938625Srvb struct PioctlData *iap = (struct PioctlData *)data; 53038625Srvb 53139085Srvb MARK_ENTRY(CODA_IOCTL_STATS); 53238625Srvb 53339085Srvb CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));) 53438625Srvb 53538625Srvb /* Don't check for operation on a dying object, for ctlvp it 53638625Srvb shouldn't matter */ 53738625Srvb 53838625Srvb /* Must be control object to succeed. */ 53938625Srvb if (!IS_CTL_VP(vp)) { 54039085Srvb MARK_INT_FAIL(CODA_IOCTL_STATS); 54139085Srvb CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));) 54238625Srvb return (EOPNOTSUPP); 54338625Srvb } 54438625Srvb /* Look up the pathname. */ 54538625Srvb 54638625Srvb /* Should we use the name cache here? It would get it from 54738625Srvb lookupname sooner or later anyway, right? */ 54838625Srvb 54943382Sbde NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, iap->path, p); 55038625Srvb error = namei(&ndp); 55138625Srvb tvp = ndp.ni_vp; 55238625Srvb 55338625Srvb if (error) { 55439085Srvb MARK_INT_FAIL(CODA_IOCTL_STATS); 55539085Srvb CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n", 55638625Srvb error));) 55738625Srvb return(error); 55838625Srvb } 55938625Srvb 56038625Srvb /* 56138625Srvb * Make sure this is a coda style cnode, but it may be a 56238625Srvb * different vfsp 56338625Srvb */ 56449687Sphk if (tvp->v_op != coda_vnodeop_p) { 56538625Srvb vrele(tvp); 56654655Seivind NDFREE(&ndp, NDF_ONLY_PNBUF); 56739085Srvb MARK_INT_FAIL(CODA_IOCTL_STATS); 56839085Srvb CODADEBUG(CODA_IOCTL, 56939085Srvb myprintf(("coda_ioctl error: %s not a coda object\n", 57038625Srvb iap->path));) 57138625Srvb return(EINVAL); 57238625Srvb } 57338625Srvb 57438625Srvb if (iap->vi.in_size > VC_MAXDATASIZE) { 57554655Seivind NDFREE(&ndp, 0); 57638625Srvb return(EINVAL); 57738625Srvb } 57838625Srvb error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, p); 57938625Srvb 58038625Srvb if (error) 58139085Srvb MARK_INT_FAIL(CODA_IOCTL_STATS); 58238625Srvb else 58339085Srvb CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) 58438625Srvb 58538625Srvb vrele(tvp); 58654655Seivind NDFREE(&ndp, NDF_ONLY_PNBUF); 58738625Srvb return(error); 58838625Srvb} 58938625Srvb 59038625Srvb/* 59138625Srvb * To reduce the cost of a user-level venus;we cache attributes in 59238625Srvb * the kernel. Each cnode has storage allocated for an attribute. If 59338625Srvb * c_vattr is valid, return a reference to it. Otherwise, get the 59438625Srvb * attributes from venus and store them in the cnode. There is some 59538625Srvb * question if this method is a security leak. But I think that in 59638625Srvb * order to make this call, the user must have done a lookup and 59738625Srvb * opened the file, and therefore should already have access. 59838625Srvb */ 59938625Srvbint 60039085Srvbcoda_getattr(v) 60138625Srvb void *v; 60238625Srvb{ 60338625Srvb/* true args */ 60438625Srvb struct vop_getattr_args *ap = v; 60538625Srvb struct vnode *vp = ap->a_vp; 60638625Srvb struct cnode *cp = VTOC(vp); 60738625Srvb struct vattr *vap = ap->a_vap; 60838625Srvb struct ucred *cred = ap->a_cred; 60938625Srvb struct proc *p = ap->a_p; 61038625Srvb/* locals */ 61138625Srvb int error; 61238625Srvb 61339085Srvb MARK_ENTRY(CODA_GETATTR_STATS); 61438625Srvb 61538625Srvb if (IS_UNMOUNTING(cp)) 61638625Srvb return ENODEV; 61738759Srvb 61838625Srvb /* Check for getattr of control object. */ 61938625Srvb if (IS_CTL_VP(vp)) { 62039085Srvb MARK_INT_FAIL(CODA_GETATTR_STATS); 62138625Srvb return(ENOENT); 62238625Srvb } 62338625Srvb 62438625Srvb /* Check to see if the attributes have already been cached */ 62538625Srvb if (VALID_VATTR(cp)) { 62639085Srvb CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n", 62738625Srvb cp->c_fid.Volume, 62838625Srvb cp->c_fid.Vnode, 62938625Srvb cp->c_fid.Unique));}); 63039085Srvb CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 63138625Srvb print_vattr(&cp->c_vattr); ); 63238625Srvb 63338625Srvb *vap = cp->c_vattr; 63439085Srvb MARK_INT_SAT(CODA_GETATTR_STATS); 63538625Srvb return(0); 63638625Srvb } 63738625Srvb 63838625Srvb error = venus_getattr(vtomi(vp), &cp->c_fid, cred, p, vap); 63938625Srvb 64038625Srvb if (!error) { 64139085Srvb CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n", 64238625Srvb cp->c_fid.Volume, 64338625Srvb cp->c_fid.Vnode, 64438625Srvb cp->c_fid.Unique, 64538625Srvb error)); ) 64638625Srvb 64739085Srvb CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 64838625Srvb print_vattr(vap); ); 64938625Srvb 65038625Srvb { int size = vap->va_size; 65138625Srvb struct vnode *convp = cp->c_ovp; 65238625Srvb if (convp != (struct vnode *)0) { 65338625Srvb vnode_pager_setsize(convp, size); 65438625Srvb } 65538625Srvb } 65638625Srvb /* If not open for write, store attributes in cnode */ 65739085Srvb if ((cp->c_owrite == 0) && (coda_attr_cache)) { 65838625Srvb cp->c_vattr = *vap; 65938625Srvb cp->c_flags |= C_VATTR; 66038625Srvb } 66138625Srvb 66238625Srvb } 66338625Srvb return(error); 66438625Srvb} 66538625Srvb 66638625Srvbint 66739085Srvbcoda_setattr(v) 66838625Srvb void *v; 66938625Srvb{ 67038625Srvb/* true args */ 67138625Srvb struct vop_setattr_args *ap = v; 67238625Srvb register struct vnode *vp = ap->a_vp; 67338625Srvb struct cnode *cp = VTOC(vp); 67438625Srvb register struct vattr *vap = ap->a_vap; 67538625Srvb struct ucred *cred = ap->a_cred; 67638625Srvb struct proc *p = ap->a_p; 67738625Srvb/* locals */ 67838625Srvb int error; 67938625Srvb 68039085Srvb MARK_ENTRY(CODA_SETATTR_STATS); 68138625Srvb 68238625Srvb /* Check for setattr of control object. */ 68338625Srvb if (IS_CTL_VP(vp)) { 68439085Srvb MARK_INT_FAIL(CODA_SETATTR_STATS); 68538625Srvb return(ENOENT); 68638625Srvb } 68738625Srvb 68839085Srvb if (codadebug & CODADBGMSK(CODA_SETATTR)) { 68938625Srvb print_vattr(vap); 69038625Srvb } 69138625Srvb error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, p); 69238625Srvb 69338625Srvb if (!error) 69438625Srvb cp->c_flags &= ~C_VATTR; 69538625Srvb 69638625Srvb { int size = vap->va_size; 69738625Srvb struct vnode *convp = cp->c_ovp; 69838625Srvb if (size != VNOVAL && convp != (struct vnode *)0) { 69938625Srvb vnode_pager_setsize(convp, size); 70038625Srvb } 70138625Srvb } 70239085Srvb CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); ) 70338625Srvb return(error); 70438625Srvb} 70538625Srvb 70638625Srvbint 70739085Srvbcoda_access(v) 70838625Srvb void *v; 70938625Srvb{ 71038625Srvb/* true args */ 71138625Srvb struct vop_access_args *ap = v; 71238625Srvb struct vnode *vp = ap->a_vp; 71338625Srvb struct cnode *cp = VTOC(vp); 71438625Srvb int mode = ap->a_mode; 71538625Srvb struct ucred *cred = ap->a_cred; 71638625Srvb struct proc *p = ap->a_p; 71738625Srvb/* locals */ 71838625Srvb int error; 71938625Srvb 72039085Srvb MARK_ENTRY(CODA_ACCESS_STATS); 72138625Srvb 72238625Srvb /* Check for access of control object. Only read access is 72338625Srvb allowed on it. */ 72438625Srvb if (IS_CTL_VP(vp)) { 72538625Srvb /* bogus hack - all will be marked as successes */ 72639085Srvb MARK_INT_SAT(CODA_ACCESS_STATS); 72738625Srvb return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 72838625Srvb ? 0 : EACCES); 72938625Srvb } 73038625Srvb 73138625Srvb /* 73238625Srvb * if the file is a directory, and we are checking exec (eg lookup) 73338625Srvb * access, and the file is in the namecache, then the user must have 73438625Srvb * lookup access to it. 73538625Srvb */ 73639085Srvb if (coda_access_cache) { 73738625Srvb if ((vp->v_type == VDIR) && (mode & VEXEC)) { 73839085Srvb if (coda_nc_lookup(cp, ".", 1, cred)) { 73939085Srvb MARK_INT_SAT(CODA_ACCESS_STATS); 74038625Srvb return(0); /* it was in the cache */ 74138625Srvb } 74238625Srvb } 74338625Srvb } 74438625Srvb 74538625Srvb error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, p); 74638625Srvb 74738625Srvb return(error); 74838625Srvb} 74938625Srvb 75038625Srvbint 75139085Srvbcoda_readlink(v) 75238625Srvb void *v; 75338625Srvb{ 75438625Srvb/* true args */ 75538625Srvb struct vop_readlink_args *ap = v; 75638625Srvb struct vnode *vp = ap->a_vp; 75738625Srvb struct cnode *cp = VTOC(vp); 75838625Srvb struct uio *uiop = ap->a_uio; 75938625Srvb struct ucred *cred = ap->a_cred; 76038625Srvb struct proc *p = ap->a_uio->uio_procp; 76138625Srvb/* locals */ 76238625Srvb int error; 76338625Srvb char *str; 76438625Srvb int len; 76538625Srvb 76639085Srvb MARK_ENTRY(CODA_READLINK_STATS); 76738625Srvb 76838625Srvb /* Check for readlink of control object. */ 76938625Srvb if (IS_CTL_VP(vp)) { 77039085Srvb MARK_INT_FAIL(CODA_READLINK_STATS); 77138625Srvb return(ENOENT); 77238625Srvb } 77338625Srvb 77439085Srvb if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ 77538625Srvb uiop->uio_rw = UIO_READ; 77638625Srvb error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); 77738625Srvb if (error) 77839085Srvb MARK_INT_FAIL(CODA_READLINK_STATS); 77938625Srvb else 78039085Srvb MARK_INT_SAT(CODA_READLINK_STATS); 78138625Srvb return(error); 78238625Srvb } 78338625Srvb 78438625Srvb error = venus_readlink(vtomi(vp), &cp->c_fid, cred, p, &str, &len); 78538625Srvb 78638625Srvb if (!error) { 78738625Srvb uiop->uio_rw = UIO_READ; 78838625Srvb error = uiomove(str, len, uiop); 78938625Srvb 79039085Srvb if (coda_symlink_cache) { 79138625Srvb cp->c_symlink = str; 79238625Srvb cp->c_symlen = len; 79338625Srvb cp->c_flags |= C_SYMLINK; 79438625Srvb } else 79539085Srvb CODA_FREE(str, len); 79638625Srvb } 79738625Srvb 79839085Srvb CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) 79938625Srvb return(error); 80038625Srvb} 80138625Srvb 80238625Srvbint 80339085Srvbcoda_fsync(v) 80438625Srvb void *v; 80538625Srvb{ 80638625Srvb/* true args */ 80738625Srvb struct vop_fsync_args *ap = v; 80838625Srvb struct vnode *vp = ap->a_vp; 80938625Srvb struct cnode *cp = VTOC(vp); 81038625Srvb struct ucred *cred = ap->a_cred; 81138625Srvb struct proc *p = ap->a_p; 81238625Srvb/* locals */ 81338625Srvb struct vnode *convp = cp->c_ovp; 81438625Srvb int error; 81538625Srvb 81639085Srvb MARK_ENTRY(CODA_FSYNC_STATS); 81738625Srvb 81838625Srvb /* Check for fsync on an unmounting object */ 81938625Srvb /* The NetBSD kernel, in it's infinite wisdom, can try to fsync 82038625Srvb * after an unmount has been initiated. This is a Bad Thing, 82138625Srvb * which we have to avoid. Not a legitimate failure for stats. 82238625Srvb */ 82338625Srvb if (IS_UNMOUNTING(cp)) { 82438625Srvb return(ENODEV); 82538625Srvb } 82638625Srvb 82738625Srvb /* Check for fsync of control object. */ 82838625Srvb if (IS_CTL_VP(vp)) { 82939085Srvb MARK_INT_SAT(CODA_FSYNC_STATS); 83038625Srvb return(0); 83138625Srvb } 83238625Srvb 83338625Srvb if (convp) 83438625Srvb VOP_FSYNC(convp, cred, MNT_WAIT, p); 83538625Srvb 83638625Srvb /* 83738625Srvb * We see fsyncs with usecount == 1 then usecount == 0. 83838625Srvb * For now we ignore them. 83938625Srvb */ 84038625Srvb /* 84138625Srvb if (!vp->v_usecount) { 84239085Srvb printf("coda_fsync on vnode %p with %d usecount. c_flags = %x (%x)\n", 84338625Srvb vp, vp->v_usecount, cp->c_flags, cp->c_flags&C_PURGING); 84438625Srvb } 84538625Srvb */ 84638625Srvb 84738625Srvb /* 84838625Srvb * We can expect fsync on any vnode at all if venus is pruging it. 84938625Srvb * Venus can't very well answer the fsync request, now can it? 85038625Srvb * Hopefully, it won't have to, because hopefully, venus preserves 85138625Srvb * the (possibly untrue) invariant that it never purges an open 85238625Srvb * vnode. Hopefully. 85338625Srvb */ 85438625Srvb if (cp->c_flags & C_PURGING) { 85538625Srvb return(0); 85638625Srvb } 85738625Srvb 85838625Srvb /* needs research */ 85938625Srvb return 0; 86038625Srvb error = venus_fsync(vtomi(vp), &cp->c_fid, cred, p); 86138625Srvb 86239085Srvb CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ); 86338625Srvb return(error); 86438625Srvb} 86538625Srvb 86638625Srvbint 86739085Srvbcoda_inactive(v) 86838625Srvb void *v; 86938625Srvb{ 87038625Srvb /* XXX - at the moment, inactive doesn't look at cred, and doesn't 87138625Srvb have a proc pointer. Oops. */ 87238625Srvb/* true args */ 87338625Srvb struct vop_inactive_args *ap = v; 87438625Srvb struct vnode *vp = ap->a_vp; 87538625Srvb struct cnode *cp = VTOC(vp); 87638625Srvb struct ucred *cred __attribute__((unused)) = NULL; 87738625Srvb struct proc *p __attribute__((unused)) = curproc; 87838625Srvb/* upcall decl */ 87938625Srvb/* locals */ 88038625Srvb 88138625Srvb /* We don't need to send inactive to venus - DCS */ 88239085Srvb MARK_ENTRY(CODA_INACTIVE_STATS); 88338625Srvb 88438625Srvb if (IS_CTL_VP(vp)) { 88539085Srvb MARK_INT_SAT(CODA_INACTIVE_STATS); 88638625Srvb return 0; 88738625Srvb } 88838625Srvb 88939085Srvb CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n", 89038625Srvb cp->c_fid.Volume, cp->c_fid.Vnode, 89138625Srvb cp->c_fid.Unique, vp->v_mount));) 89238625Srvb 89338625Srvb /* If an array has been allocated to hold the symlink, deallocate it */ 89439085Srvb if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { 89538625Srvb if (cp->c_symlink == NULL) 89639085Srvb panic("coda_inactive: null symlink pointer in cnode"); 89738625Srvb 89839085Srvb CODA_FREE(cp->c_symlink, cp->c_symlen); 89938625Srvb cp->c_flags &= ~C_SYMLINK; 90038625Srvb cp->c_symlen = 0; 90138625Srvb } 90238625Srvb 90338625Srvb /* Remove it from the table so it can't be found. */ 90439085Srvb coda_unsave(cp); 90539085Srvb if ((struct coda_mntinfo *)(vp->v_mount->mnt_data) == NULL) { 90638625Srvb myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); 90739085Srvb panic("badness in coda_inactive\n"); 90838625Srvb } 90938625Srvb 91038625Srvb if (IS_UNMOUNTING(cp)) { 91138625Srvb#ifdef DEBUG 91239085Srvb printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp); 91338625Srvb if (cp->c_ovp != NULL) 91439085Srvb printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n", 91538625Srvb vp->v_usecount, vp, cp); 91638625Srvb#endif 91738759Srvb lockmgr(&cp->c_lock, LK_RELEASE, &vp->v_interlock, p); 91838625Srvb } else { 91939650Srvb#ifdef OLD_DIAGNOSTIC 92038625Srvb if (CTOV(cp)->v_usecount) { 92139085Srvb panic("coda_inactive: nonzero reference count"); 92238625Srvb } 92338625Srvb if (cp->c_ovp != NULL) { 92439085Srvb panic("coda_inactive: cp->ovp != NULL"); 92538625Srvb } 92638625Srvb#endif 92738759Srvb VOP_UNLOCK(vp, 0, p); 92838625Srvb vgone(vp); 92938625Srvb } 93038625Srvb 93139085Srvb MARK_INT_SAT(CODA_INACTIVE_STATS); 93238625Srvb return(0); 93338625Srvb} 93438625Srvb 93538625Srvb/* 93638625Srvb * Remote file system operations having to do with directory manipulation. 93738625Srvb */ 93838625Srvb 93938625Srvb/* 94038625Srvb * It appears that in NetBSD, lookup is supposed to return the vnode locked 94138625Srvb */ 94238625Srvbint 94339085Srvbcoda_lookup(v) 94438625Srvb void *v; 94538625Srvb{ 94638625Srvb/* true args */ 94738625Srvb struct vop_lookup_args *ap = v; 94838625Srvb struct vnode *dvp = ap->a_dvp; 94938625Srvb struct cnode *dcp = VTOC(dvp); 95038625Srvb struct vnode **vpp = ap->a_vpp; 95138625Srvb /* 95238625Srvb * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest 95338625Srvb * of the string to xlate, and that we must try to get at least 95438625Srvb * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I 95538625Srvb * could be wrong. 95638625Srvb */ 95738625Srvb struct componentname *cnp = ap->a_cnp; 95838625Srvb struct ucred *cred = cnp->cn_cred; 95938625Srvb struct proc *p = cnp->cn_proc; 96038625Srvb/* locals */ 96138625Srvb struct cnode *cp; 96238625Srvb const char *nm = cnp->cn_nameptr; 96338625Srvb int len = cnp->cn_namelen; 96438625Srvb ViceFid VFid; 96538625Srvb int vtype; 96638625Srvb int error = 0; 96738625Srvb 96839085Srvb MARK_ENTRY(CODA_LOOKUP_STATS); 96938625Srvb 97039085Srvb CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n", 97138625Srvb nm, dcp->c_fid.Volume, 97238625Srvb dcp->c_fid.Vnode, dcp->c_fid.Unique));); 97338625Srvb 97438625Srvb /* Check for lookup of control object. */ 97538625Srvb if (IS_CTL_NAME(dvp, nm, len)) { 97639085Srvb *vpp = coda_ctlvp; 97738625Srvb vref(*vpp); 97839085Srvb MARK_INT_SAT(CODA_LOOKUP_STATS); 97938625Srvb goto exit; 98038625Srvb } 98138625Srvb 98239085Srvb if (len+1 > CODA_MAXNAMLEN) { 98339085Srvb MARK_INT_FAIL(CODA_LOOKUP_STATS); 98439085Srvb CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n", 98538625Srvb dcp->c_fid.Volume, dcp->c_fid.Vnode, 98638625Srvb dcp->c_fid.Unique, nm));); 98738625Srvb *vpp = (struct vnode *)0; 98838625Srvb error = EINVAL; 98938625Srvb goto exit; 99038625Srvb } 99138625Srvb /* First try to look the file up in the cfs name cache */ 99238625Srvb /* lock the parent vnode? */ 99339085Srvb cp = coda_nc_lookup(dcp, nm, len, cred); 99438625Srvb if (cp) { 99538625Srvb *vpp = CTOV(cp); 99638625Srvb vref(*vpp); 99739085Srvb CODADEBUG(CODA_LOOKUP, 99838625Srvb myprintf(("lookup result %d vpp %p\n",error,*vpp));) 99938625Srvb } else { 100038625Srvb 100138625Srvb /* The name wasn't cached, so we need to contact Venus */ 100238625Srvb error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, p, &VFid, &vtype); 100338625Srvb 100438625Srvb if (error) { 100539085Srvb MARK_INT_FAIL(CODA_LOOKUP_STATS); 100639085Srvb CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n", 100738625Srvb dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));) 100838625Srvb *vpp = (struct vnode *)0; 100938625Srvb } else { 101039085Srvb MARK_INT_SAT(CODA_LOOKUP_STATS); 101139085Srvb CODADEBUG(CODA_LOOKUP, 101238625Srvb myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n", 101338625Srvb VFid.Volume, VFid.Vnode, VFid.Unique, vtype, 101438625Srvb error)); ) 101538625Srvb 101639085Srvb cp = make_coda_node(&VFid, dvp->v_mount, vtype); 101738625Srvb *vpp = CTOV(cp); 101838625Srvb 101938625Srvb /* enter the new vnode in the Name Cache only if the top bit isn't set */ 102038625Srvb /* And don't enter a new vnode for an invalid one! */ 102139085Srvb if (!(vtype & CODA_NOCACHE)) 102239085Srvb coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 102338625Srvb } 102438625Srvb } 102538625Srvb 102638625Srvb exit: 102738625Srvb /* 102838625Srvb * If we are creating, and this was the last name to be looked up, 102938625Srvb * and the error was ENOENT, then there really shouldn't be an 103038625Srvb * error and we can make the leaf NULL and return success. Since 103138625Srvb * this is supposed to work under Mach as well as NetBSD, we're 103238625Srvb * leaving this fn wrapped. We also must tell lookup/namei that 103338625Srvb * we need to save the last component of the name. (Create will 103438625Srvb * have to free the name buffer later...lucky us...) 103538625Srvb */ 103638625Srvb if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) 103738625Srvb && (cnp->cn_flags & ISLASTCN) 103838625Srvb && (error == ENOENT)) 103938625Srvb { 104038625Srvb error = EJUSTRETURN; 104138625Srvb cnp->cn_flags |= SAVENAME; 104238625Srvb *ap->a_vpp = NULL; 104338625Srvb } 104438625Srvb 104538625Srvb /* 104638625Srvb * If we are removing, and we are at the last element, and we 104738625Srvb * found it, then we need to keep the name around so that the 104838625Srvb * removal will go ahead as planned. Unfortunately, this will 104938625Srvb * probably also lock the to-be-removed vnode, which may or may 105038625Srvb * not be a good idea. I'll have to look at the bits of 105139085Srvb * coda_remove to make sure. We'll only save the name if we did in 105239085Srvb * fact find the name, otherwise coda_remove won't have a chance 105338625Srvb * to free the pathname. 105438625Srvb */ 105538625Srvb if ((cnp->cn_nameiop == DELETE) 105638625Srvb && (cnp->cn_flags & ISLASTCN) 105738625Srvb && !error) 105838625Srvb { 105938625Srvb cnp->cn_flags |= SAVENAME; 106038625Srvb } 106138625Srvb 106238625Srvb /* 106338625Srvb * If the lookup went well, we need to (potentially?) unlock the 106438625Srvb * parent, and lock the child. We are only responsible for 106538625Srvb * checking to see if the parent is supposed to be unlocked before 106638625Srvb * we return. We must always lock the child (provided there is 106738625Srvb * one, and (the parent isn't locked or it isn't the same as the 106838625Srvb * parent.) Simple, huh? We can never leave the parent locked unless 106938625Srvb * we are ISLASTCN 107038625Srvb */ 107138625Srvb if (!error || (error == EJUSTRETURN)) { 107238625Srvb if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) { 107338759Srvb if ((error = VOP_UNLOCK(dvp, 0, p))) { 107438625Srvb return error; 107538625Srvb } 107638625Srvb /* 107738625Srvb * The parent is unlocked. As long as there is a child, 107838625Srvb * lock it without bothering to check anything else. 107938625Srvb */ 108038625Srvb if (*ap->a_vpp) { 108138759Srvb if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 108239085Srvb printf("coda_lookup: "); 108338625Srvb panic("unlocked parent but couldn't lock child"); 108438625Srvb } 108538625Srvb } 108638625Srvb } else { 108738625Srvb /* The parent is locked, and may be the same as the child */ 108838625Srvb if (*ap->a_vpp && (*ap->a_vpp != dvp)) { 108938625Srvb /* Different, go ahead and lock it. */ 109038759Srvb if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 109139085Srvb printf("coda_lookup: "); 109238625Srvb panic("unlocked parent but couldn't lock child"); 109338625Srvb } 109438625Srvb } 109538625Srvb } 109638625Srvb } else { 109738625Srvb /* If the lookup failed, we need to ensure that the leaf is NULL */ 109838625Srvb /* Don't change any locking? */ 109938625Srvb *ap->a_vpp = NULL; 110038625Srvb } 110138625Srvb return(error); 110238625Srvb} 110338625Srvb 110438625Srvb/*ARGSUSED*/ 110538625Srvbint 110639085Srvbcoda_create(v) 110738625Srvb void *v; 110838625Srvb{ 110938625Srvb/* true args */ 111038625Srvb struct vop_create_args *ap = v; 111138625Srvb struct vnode *dvp = ap->a_dvp; 111238625Srvb struct cnode *dcp = VTOC(dvp); 111338625Srvb struct vattr *va = ap->a_vap; 111438625Srvb int exclusive = 1; 111538625Srvb int mode = ap->a_vap->va_mode; 111638625Srvb struct vnode **vpp = ap->a_vpp; 111738625Srvb struct componentname *cnp = ap->a_cnp; 111838625Srvb struct ucred *cred = cnp->cn_cred; 111938625Srvb struct proc *p = cnp->cn_proc; 112038625Srvb/* locals */ 112138625Srvb int error; 112238625Srvb struct cnode *cp; 112338625Srvb const char *nm = cnp->cn_nameptr; 112438625Srvb int len = cnp->cn_namelen; 112538625Srvb ViceFid VFid; 112638625Srvb struct vattr attr; 112738625Srvb 112839085Srvb MARK_ENTRY(CODA_CREATE_STATS); 112938625Srvb 113038625Srvb /* All creates are exclusive XXX */ 113138625Srvb /* I'm assuming the 'mode' argument is the file mode bits XXX */ 113238625Srvb 113338625Srvb /* Check for create of control object. */ 113438625Srvb if (IS_CTL_NAME(dvp, nm, len)) { 113538625Srvb *vpp = (struct vnode *)0; 113639085Srvb MARK_INT_FAIL(CODA_CREATE_STATS); 113738625Srvb return(EACCES); 113838625Srvb } 113938625Srvb 114038625Srvb error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, p, &VFid, &attr); 114138625Srvb 114238625Srvb if (!error) { 114338625Srvb 114438625Srvb /* If this is an exclusive create, panic if the file already exists. */ 114538625Srvb /* Venus should have detected the file and reported EEXIST. */ 114638625Srvb 114738625Srvb if ((exclusive == 1) && 114839085Srvb (coda_find(&VFid) != NULL)) 114938625Srvb panic("cnode existed for newly created file!"); 115038625Srvb 115139085Srvb cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); 115238625Srvb *vpp = CTOV(cp); 115338625Srvb 115438625Srvb /* Update va to reflect the new attributes. */ 115538625Srvb (*va) = attr; 115638625Srvb 115738625Srvb /* Update the attribute cache and mark it as valid */ 115839085Srvb if (coda_attr_cache) { 115938625Srvb VTOC(*vpp)->c_vattr = attr; 116038625Srvb VTOC(*vpp)->c_flags |= C_VATTR; 116138625Srvb } 116238625Srvb 116338625Srvb /* Invalidate the parent's attr cache, the modification time has changed */ 116438625Srvb VTOC(dvp)->c_flags &= ~C_VATTR; 116538625Srvb 116638625Srvb /* enter the new vnode in the Name Cache */ 116739085Srvb coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 116838625Srvb 116939085Srvb CODADEBUG(CODA_CREATE, 117038625Srvb myprintf(("create: (%lx.%lx.%lx), result %d\n", 117138625Srvb VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 117238625Srvb } else { 117338625Srvb *vpp = (struct vnode *)0; 117439085Srvb CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));) 117538625Srvb } 117638625Srvb 117738625Srvb if (!error) { 117838625Srvb if (cnp->cn_flags & LOCKLEAF) { 117938759Srvb if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 118039085Srvb printf("coda_create: "); 118138625Srvb panic("unlocked parent but couldn't lock child"); 118238625Srvb } 118338625Srvb } 118439650Srvb#ifdef OLD_DIAGNOSTIC 118538625Srvb else { 118639085Srvb printf("coda_create: LOCKLEAF not set!\n"); 118738625Srvb } 118839650Srvb#endif 118938625Srvb } 119038625Srvb return(error); 119138625Srvb} 119238625Srvb 119338625Srvbint 119439085Srvbcoda_remove(v) 119538625Srvb void *v; 119638625Srvb{ 119738625Srvb/* true args */ 119838625Srvb struct vop_remove_args *ap = v; 119938625Srvb struct vnode *dvp = ap->a_dvp; 120038625Srvb struct cnode *cp = VTOC(dvp); 120138625Srvb struct componentname *cnp = ap->a_cnp; 120238625Srvb struct ucred *cred = cnp->cn_cred; 120338625Srvb struct proc *p = cnp->cn_proc; 120438625Srvb/* locals */ 120538625Srvb int error; 120638625Srvb const char *nm = cnp->cn_nameptr; 120738625Srvb int len = cnp->cn_namelen; 120838625Srvb struct cnode *tp; 120938625Srvb 121039085Srvb MARK_ENTRY(CODA_REMOVE_STATS); 121138625Srvb 121239085Srvb CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n", 121338625Srvb nm, cp->c_fid.Volume, cp->c_fid.Vnode, 121438625Srvb cp->c_fid.Unique));); 121538625Srvb 121639085Srvb /* Remove the file's entry from the CODA Name Cache */ 121738625Srvb /* We're being conservative here, it might be that this person 121838625Srvb * doesn't really have sufficient access to delete the file 121938625Srvb * but we feel zapping the entry won't really hurt anyone -- dcs 122038625Srvb */ 122138625Srvb /* I'm gonna go out on a limb here. If a file and a hardlink to it 122238625Srvb * exist, and one is removed, the link count on the other will be 122338625Srvb * off by 1. We could either invalidate the attrs if cached, or 122438625Srvb * fix them. I'll try to fix them. DCS 11/8/94 122538625Srvb */ 122639085Srvb tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); 122738625Srvb if (tp) { 122838625Srvb if (VALID_VATTR(tp)) { /* If attrs are cached */ 122938625Srvb if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ 123038625Srvb tp->c_vattr.va_nlink--; 123138625Srvb } 123238625Srvb } 123338625Srvb 123439085Srvb coda_nc_zapfile(VTOC(dvp), nm, len); 123538625Srvb /* No need to flush it if it doesn't exist! */ 123638625Srvb } 123738625Srvb /* Invalidate the parent's attr cache, the modification time has changed */ 123838625Srvb VTOC(dvp)->c_flags &= ~C_VATTR; 123938625Srvb 124038625Srvb /* Check for remove of control object. */ 124138625Srvb if (IS_CTL_NAME(dvp, nm, len)) { 124239085Srvb MARK_INT_FAIL(CODA_REMOVE_STATS); 124338625Srvb return(ENOENT); 124438625Srvb } 124538625Srvb 124638625Srvb error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, p); 124738625Srvb 124839085Srvb CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) 124938625Srvb 125038625Srvb return(error); 125138625Srvb} 125238625Srvb 125338625Srvbint 125439085Srvbcoda_link(v) 125538625Srvb void *v; 125638625Srvb{ 125738625Srvb/* true args */ 125838625Srvb struct vop_link_args *ap = v; 125938625Srvb struct vnode *vp = ap->a_vp; 126038625Srvb struct cnode *cp = VTOC(vp); 126138625Srvb struct vnode *tdvp = ap->a_tdvp; 126238625Srvb struct cnode *tdcp = VTOC(tdvp); 126338625Srvb struct componentname *cnp = ap->a_cnp; 126438625Srvb struct ucred *cred = cnp->cn_cred; 126538625Srvb struct proc *p = cnp->cn_proc; 126638625Srvb/* locals */ 126738625Srvb int error; 126838625Srvb const char *nm = cnp->cn_nameptr; 126938625Srvb int len = cnp->cn_namelen; 127038625Srvb 127139085Srvb MARK_ENTRY(CODA_LINK_STATS); 127238625Srvb 127339085Srvb if (codadebug & CODADBGMSK(CODA_LINK)) { 127438625Srvb 127538625Srvb myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n", 127638625Srvb cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 127738625Srvb myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n", 127838625Srvb tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 127938625Srvb 128038625Srvb } 128139085Srvb if (codadebug & CODADBGMSK(CODA_LINK)) { 128238625Srvb myprintf(("link: vp fid: (%lx.%lx.%lx)\n", 128338625Srvb cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 128438625Srvb myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n", 128538625Srvb tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 128638625Srvb 128738625Srvb } 128838625Srvb 128938625Srvb /* Check for link to/from control object. */ 129038625Srvb if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) { 129139085Srvb MARK_INT_FAIL(CODA_LINK_STATS); 129238625Srvb return(EACCES); 129338625Srvb } 129438625Srvb 129538625Srvb error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, p); 129638625Srvb 129738625Srvb /* Invalidate the parent's attr cache, the modification time has changed */ 129838625Srvb VTOC(tdvp)->c_flags &= ~C_VATTR; 129938625Srvb VTOC(vp)->c_flags &= ~C_VATTR; 130038625Srvb 130139085Srvb CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) 130238625Srvb 130338625Srvb return(error); 130438625Srvb} 130538625Srvb 130638625Srvbint 130739085Srvbcoda_rename(v) 130838625Srvb void *v; 130938625Srvb{ 131038625Srvb/* true args */ 131138625Srvb struct vop_rename_args *ap = v; 131238625Srvb struct vnode *odvp = ap->a_fdvp; 131338625Srvb struct cnode *odcp = VTOC(odvp); 131438625Srvb struct componentname *fcnp = ap->a_fcnp; 131538625Srvb struct vnode *ndvp = ap->a_tdvp; 131638625Srvb struct cnode *ndcp = VTOC(ndvp); 131738625Srvb struct componentname *tcnp = ap->a_tcnp; 131838625Srvb struct ucred *cred = fcnp->cn_cred; 131938625Srvb struct proc *p = fcnp->cn_proc; 132038625Srvb/* true args */ 132138625Srvb int error; 132238625Srvb const char *fnm = fcnp->cn_nameptr; 132338625Srvb int flen = fcnp->cn_namelen; 132438625Srvb const char *tnm = tcnp->cn_nameptr; 132538625Srvb int tlen = tcnp->cn_namelen; 132638625Srvb 132739085Srvb MARK_ENTRY(CODA_RENAME_STATS); 132838625Srvb 132938625Srvb /* Hmmm. The vnodes are already looked up. Perhaps they are locked? 133038625Srvb This could be Bad. XXX */ 133139650Srvb#ifdef OLD_DIAGNOSTIC 133238625Srvb if ((fcnp->cn_cred != tcnp->cn_cred) 133338625Srvb || (fcnp->cn_proc != tcnp->cn_proc)) 133438625Srvb { 133539085Srvb panic("coda_rename: component names don't agree"); 133638625Srvb } 133739650Srvb#endif 133838625Srvb 133938625Srvb /* Check for rename involving control object. */ 134038625Srvb if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { 134139085Srvb MARK_INT_FAIL(CODA_RENAME_STATS); 134238625Srvb return(EACCES); 134338625Srvb } 134438625Srvb 134538625Srvb /* Problem with moving directories -- need to flush entry for .. */ 134638625Srvb if (odvp != ndvp) { 134739085Srvb struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); 134838625Srvb if (ovcp) { 134938625Srvb struct vnode *ovp = CTOV(ovcp); 135038625Srvb if ((ovp) && 135138625Srvb (ovp->v_type == VDIR)) /* If it's a directory */ 135239085Srvb coda_nc_zapfile(VTOC(ovp),"..", 2); 135338625Srvb } 135438625Srvb } 135538625Srvb 135638625Srvb /* Remove the entries for both source and target files */ 135739085Srvb coda_nc_zapfile(VTOC(odvp), fnm, flen); 135839085Srvb coda_nc_zapfile(VTOC(ndvp), tnm, tlen); 135938625Srvb 136038625Srvb /* Invalidate the parent's attr cache, the modification time has changed */ 136138625Srvb VTOC(odvp)->c_flags &= ~C_VATTR; 136238625Srvb VTOC(ndvp)->c_flags &= ~C_VATTR; 136338625Srvb 136439085Srvb if (flen+1 > CODA_MAXNAMLEN) { 136539085Srvb MARK_INT_FAIL(CODA_RENAME_STATS); 136638625Srvb error = EINVAL; 136738625Srvb goto exit; 136838625Srvb } 136938625Srvb 137039085Srvb if (tlen+1 > CODA_MAXNAMLEN) { 137139085Srvb MARK_INT_FAIL(CODA_RENAME_STATS); 137238625Srvb error = EINVAL; 137338625Srvb goto exit; 137438625Srvb } 137538625Srvb 137638625Srvb error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, p); 137738625Srvb 137838625Srvb exit: 137939085Srvb CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) 138038625Srvb /* XXX - do we need to call cache pureg on the moved vnode? */ 138138625Srvb cache_purge(ap->a_fvp); 138238625Srvb 138338625Srvb /* It seems to be incumbent on us to drop locks on all four vnodes */ 138438625Srvb /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ 138538625Srvb 138638625Srvb vrele(ap->a_fvp); 138738625Srvb vrele(odvp); 138838625Srvb 138938625Srvb if (ap->a_tvp) { 139038625Srvb if (ap->a_tvp == ndvp) { 139138625Srvb vrele(ap->a_tvp); 139238625Srvb } else { 139338625Srvb vput(ap->a_tvp); 139438625Srvb } 139538625Srvb } 139638625Srvb 139738625Srvb vput(ndvp); 139838625Srvb return(error); 139938625Srvb} 140038625Srvb 140138625Srvbint 140239085Srvbcoda_mkdir(v) 140338625Srvb void *v; 140438625Srvb{ 140538625Srvb/* true args */ 140638625Srvb struct vop_mkdir_args *ap = v; 140738625Srvb struct vnode *dvp = ap->a_dvp; 140838625Srvb struct cnode *dcp = VTOC(dvp); 140938625Srvb struct componentname *cnp = ap->a_cnp; 141038625Srvb register struct vattr *va = ap->a_vap; 141138625Srvb struct vnode **vpp = ap->a_vpp; 141238625Srvb struct ucred *cred = cnp->cn_cred; 141338625Srvb struct proc *p = cnp->cn_proc; 141438625Srvb/* locals */ 141538625Srvb int error; 141638625Srvb const char *nm = cnp->cn_nameptr; 141738625Srvb int len = cnp->cn_namelen; 141838625Srvb struct cnode *cp; 141938625Srvb ViceFid VFid; 142038625Srvb struct vattr ova; 142138625Srvb 142239085Srvb MARK_ENTRY(CODA_MKDIR_STATS); 142338625Srvb 142438625Srvb /* Check for mkdir of target object. */ 142538625Srvb if (IS_CTL_NAME(dvp, nm, len)) { 142638625Srvb *vpp = (struct vnode *)0; 142739085Srvb MARK_INT_FAIL(CODA_MKDIR_STATS); 142838625Srvb return(EACCES); 142938625Srvb } 143038625Srvb 143139085Srvb if (len+1 > CODA_MAXNAMLEN) { 143238625Srvb *vpp = (struct vnode *)0; 143339085Srvb MARK_INT_FAIL(CODA_MKDIR_STATS); 143438625Srvb return(EACCES); 143538625Srvb } 143638625Srvb 143738625Srvb error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, p, &VFid, &ova); 143838625Srvb 143938625Srvb if (!error) { 144039085Srvb if (coda_find(&VFid) != NULL) 144138625Srvb panic("cnode existed for newly created directory!"); 144238625Srvb 144338625Srvb 144439085Srvb cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); 144538625Srvb *vpp = CTOV(cp); 144638625Srvb 144738625Srvb /* enter the new vnode in the Name Cache */ 144839085Srvb coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 144938625Srvb 145038625Srvb /* as a side effect, enter "." and ".." for the directory */ 145139085Srvb coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); 145239085Srvb coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); 145338625Srvb 145439085Srvb if (coda_attr_cache) { 145538625Srvb VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ 145638625Srvb VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ 145738625Srvb } 145838625Srvb 145938625Srvb /* Invalidate the parent's attr cache, the modification time has changed */ 146038625Srvb VTOC(dvp)->c_flags &= ~C_VATTR; 146138625Srvb 146239085Srvb CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n", 146338625Srvb VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 146438625Srvb } else { 146538625Srvb *vpp = (struct vnode *)0; 146639085Srvb CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));) 146738625Srvb } 146838625Srvb 146938625Srvb return(error); 147038625Srvb} 147138625Srvb 147238625Srvbint 147339085Srvbcoda_rmdir(v) 147438625Srvb void *v; 147538625Srvb{ 147638625Srvb/* true args */ 147738625Srvb struct vop_rmdir_args *ap = v; 147838625Srvb struct vnode *dvp = ap->a_dvp; 147938625Srvb struct cnode *dcp = VTOC(dvp); 148038625Srvb struct componentname *cnp = ap->a_cnp; 148138625Srvb struct ucred *cred = cnp->cn_cred; 148238625Srvb struct proc *p = cnp->cn_proc; 148338625Srvb/* true args */ 148438625Srvb int error; 148538625Srvb const char *nm = cnp->cn_nameptr; 148638625Srvb int len = cnp->cn_namelen; 148738625Srvb struct cnode *cp; 148838625Srvb 148939085Srvb MARK_ENTRY(CODA_RMDIR_STATS); 149038625Srvb 149138625Srvb /* Check for rmdir of control object. */ 149238625Srvb if (IS_CTL_NAME(dvp, nm, len)) { 149339085Srvb MARK_INT_FAIL(CODA_RMDIR_STATS); 149438625Srvb return(ENOENT); 149538625Srvb } 149638625Srvb 149738625Srvb /* We're being conservative here, it might be that this person 149838625Srvb * doesn't really have sufficient access to delete the file 149938625Srvb * but we feel zapping the entry won't really hurt anyone -- dcs 150038625Srvb */ 150138625Srvb /* 150238625Srvb * As a side effect of the rmdir, remove any entries for children of 150338625Srvb * the directory, especially "." and "..". 150438625Srvb */ 150539085Srvb cp = coda_nc_lookup(dcp, nm, len, cred); 150639085Srvb if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); 150738625Srvb 150839085Srvb /* Remove the file's entry from the CODA Name Cache */ 150939085Srvb coda_nc_zapfile(dcp, nm, len); 151038625Srvb 151138625Srvb /* Invalidate the parent's attr cache, the modification time has changed */ 151238625Srvb dcp->c_flags &= ~C_VATTR; 151338625Srvb 151438625Srvb error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, p); 151538625Srvb 151639085Srvb CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) 151738625Srvb 151838625Srvb return(error); 151938625Srvb} 152038625Srvb 152138625Srvbint 152239085Srvbcoda_symlink(v) 152338625Srvb void *v; 152438625Srvb{ 152538625Srvb/* true args */ 152638625Srvb struct vop_symlink_args *ap = v; 152738625Srvb struct vnode *tdvp = ap->a_dvp; 152838625Srvb struct cnode *tdcp = VTOC(tdvp); 152938625Srvb struct componentname *cnp = ap->a_cnp; 153038625Srvb struct vattr *tva = ap->a_vap; 153138625Srvb char *path = ap->a_target; 153238625Srvb struct ucred *cred = cnp->cn_cred; 153338625Srvb struct proc *p = cnp->cn_proc; 153453131Seivind struct vnode **vpp = ap->a_vpp; 153538625Srvb/* locals */ 153638625Srvb int error; 153738625Srvb /* 153839085Srvb * XXX I'm assuming the following things about coda_symlink's 153938625Srvb * arguments: 154038625Srvb * t(foo) is the new name/parent/etc being created. 154138625Srvb * lname is the contents of the new symlink. 154238625Srvb */ 154338759Srvb char *nm = cnp->cn_nameptr; 154438625Srvb int len = cnp->cn_namelen; 154538625Srvb int plen = strlen(path); 154638625Srvb 154738625Srvb /* 154838625Srvb * Here's the strategy for the moment: perform the symlink, then 154938625Srvb * do a lookup to grab the resulting vnode. I know this requires 155038625Srvb * two communications with Venus for a new sybolic link, but 155138625Srvb * that's the way the ball bounces. I don't yet want to change 155238625Srvb * the way the Mach symlink works. When Mach support is 155338625Srvb * deprecated, we should change symlink so that the common case 155438625Srvb * returns the resultant vnode in a vpp argument. 155538625Srvb */ 155638625Srvb 155739085Srvb MARK_ENTRY(CODA_SYMLINK_STATS); 155838625Srvb 155938625Srvb /* Check for symlink of control object. */ 156038625Srvb if (IS_CTL_NAME(tdvp, nm, len)) { 156139085Srvb MARK_INT_FAIL(CODA_SYMLINK_STATS); 156238625Srvb return(EACCES); 156338625Srvb } 156438625Srvb 156539085Srvb if (plen+1 > CODA_MAXPATHLEN) { 156639085Srvb MARK_INT_FAIL(CODA_SYMLINK_STATS); 156738625Srvb return(EINVAL); 156838625Srvb } 156938625Srvb 157039085Srvb if (len+1 > CODA_MAXNAMLEN) { 157139085Srvb MARK_INT_FAIL(CODA_SYMLINK_STATS); 157238625Srvb error = EINVAL; 157338625Srvb goto exit; 157438625Srvb } 157538625Srvb 157638625Srvb error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, p); 157738625Srvb 157838625Srvb /* Invalidate the parent's attr cache, the modification time has changed */ 157938625Srvb tdcp->c_flags &= ~C_VATTR; 158038625Srvb 158153131Seivind if (error == 0) 158253131Seivind error = VOP_LOOKUP(tdvp, vpp, cnp); 158338625Srvb 158438625Srvb exit: 158539085Srvb CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) 158638625Srvb return(error); 158738625Srvb} 158838625Srvb 158938625Srvb/* 159038625Srvb * Read directory entries. 159138625Srvb */ 159238625Srvbint 159339085Srvbcoda_readdir(v) 159438625Srvb void *v; 159538625Srvb{ 159638625Srvb/* true args */ 159738625Srvb struct vop_readdir_args *ap = v; 159838625Srvb struct vnode *vp = ap->a_vp; 159938625Srvb struct cnode *cp = VTOC(vp); 160038625Srvb register struct uio *uiop = ap->a_uio; 160138625Srvb struct ucred *cred = ap->a_cred; 160238625Srvb int *eofflag = ap->a_eofflag; 160338625Srvb u_long **cookies = ap->a_cookies; 160438625Srvb int *ncookies = ap->a_ncookies; 160538625Srvb struct proc *p = ap->a_uio->uio_procp; 160638625Srvb/* upcall decl */ 160738625Srvb/* locals */ 160838625Srvb int error = 0; 160938625Srvb 161039085Srvb MARK_ENTRY(CODA_READDIR_STATS); 161138625Srvb 161249524Sbde CODADEBUG(CODA_READDIR, myprintf(("coda_readdir(%p, %d, %lld, %d)\n", 161349524Sbde (void *)uiop->uio_iov->iov_base, 161449524Sbde uiop->uio_resid, 161549524Sbde (long long)uiop->uio_offset, 161649524Sbde uiop->uio_segflg)); ) 161738625Srvb 161838625Srvb /* Check for readdir of control object. */ 161938625Srvb if (IS_CTL_VP(vp)) { 162039085Srvb MARK_INT_FAIL(CODA_READDIR_STATS); 162138625Srvb return(ENOENT); 162238625Srvb } 162338625Srvb 162438759Srvb { 162538625Srvb /* If directory is not already open do an "internal open" on it. */ 162638625Srvb int opened_internally = 0; 162738625Srvb if (cp->c_ovp == NULL) { 162838625Srvb opened_internally = 1; 162939085Srvb MARK_INT_GEN(CODA_OPEN_STATS); 163038625Srvb error = VOP_OPEN(vp, FREAD, cred, p); 163139085Srvbprintf("coda_readdir: Internally Opening %p\n", vp); 163238625Srvb if (error) { 163339085Srvb printf("coda_readdir: VOP_OPEN on container failed %d\n", error); 163438625Srvb return (error); 163538625Srvb } 163638625Srvb if (vp->v_type == VREG) { 163742315Seivind error = vfs_object_create(vp, p, cred); 163838625Srvb if (error != 0) { 163939085Srvb printf("coda_readdir: vfs_object_create() returns %d\n", error); 164038625Srvb vput(vp); 164138625Srvb } 164238625Srvb } 164338625Srvb if (error) return(error); 164438625Srvb } 164538625Srvb 164638625Srvb /* Have UFS handle the call. */ 164739085Srvb 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)); ) 164838625Srvb error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, ncookies, 164938625Srvb cookies); 165038625Srvb 165138625Srvb if (error) 165239085Srvb MARK_INT_FAIL(CODA_READDIR_STATS); 165338625Srvb else 165439085Srvb MARK_INT_SAT(CODA_READDIR_STATS); 165538625Srvb 165638625Srvb /* Do an "internal close" if necessary. */ 165738625Srvb if (opened_internally) { 165839085Srvb MARK_INT_GEN(CODA_CLOSE_STATS); 165938625Srvb (void)VOP_CLOSE(vp, FREAD, cred, p); 166038625Srvb } 166138625Srvb } 166238625Srvb 166338625Srvb return(error); 166438625Srvb} 166538625Srvb 166638625Srvb/* 166738625Srvb * Convert from file system blocks to device blocks 166838625Srvb */ 166938625Srvbint 167039085Srvbcoda_bmap(v) 167138625Srvb void *v; 167238625Srvb{ 167338625Srvb /* XXX on the global proc */ 167438625Srvb/* true args */ 167538625Srvb struct vop_bmap_args *ap = v; 167638625Srvb struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */ 167738625Srvb daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */ 167838625Srvb struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */ 167938625Srvb daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */ 168038625Srvb struct proc *p __attribute__((unused)) = curproc; 168138625Srvb/* upcall decl */ 168238625Srvb/* locals */ 168338625Srvb 168438625Srvb int ret = 0; 168538625Srvb struct cnode *cp; 168638625Srvb 168738625Srvb cp = VTOC(vp); 168838625Srvb if (cp->c_ovp) { 168939728Srvb return EINVAL; 169038625Srvb ret = VOP_BMAP(cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb); 169139650Srvb#if 0 169238625Srvb printf("VOP_BMAP(cp->c_ovp %p, bn %p, vpp %p, bnp %p, ap->a_runp %p, ap->a_runb %p) = %d\n", 169338625Srvb cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb, ret); 169439650Srvb#endif 169538625Srvb return ret; 169638625Srvb } else { 169741504Srvb#if 0 169839085Srvb printf("coda_bmap: no container\n"); 169941504Srvb#endif 170038625Srvb return(EOPNOTSUPP); 170138625Srvb } 170238625Srvb} 170338625Srvb 170438625Srvb/* 170538625Srvb * I don't think the following two things are used anywhere, so I've 170638625Srvb * commented them out 170738625Srvb * 170838625Srvb * struct buf *async_bufhead; 170938625Srvb * int async_daemon_count; 171038625Srvb */ 171138625Srvbint 171239085Srvbcoda_strategy(v) 171338625Srvb void *v; 171438625Srvb{ 171538625Srvb/* true args */ 171638625Srvb struct vop_strategy_args *ap = v; 171738625Srvb register struct buf *bp __attribute__((unused)) = ap->a_bp; 171838625Srvb struct proc *p __attribute__((unused)) = curproc; 171938625Srvb/* upcall decl */ 172038625Srvb/* locals */ 172138625Srvb 172239085Srvb printf("coda_strategy: called ???\n"); 172338625Srvb return(EOPNOTSUPP); 172438625Srvb} 172538625Srvb 172638625Srvbint 172739085Srvbcoda_reclaim(v) 172838625Srvb void *v; 172938625Srvb{ 173038625Srvb/* true args */ 173138625Srvb struct vop_reclaim_args *ap = v; 173238625Srvb struct vnode *vp = ap->a_vp; 173338625Srvb struct cnode *cp = VTOC(vp); 173438625Srvb/* upcall decl */ 173538625Srvb/* locals */ 173638625Srvb 173738625Srvb/* 173838625Srvb * Forced unmount/flush will let vnodes with non zero use be destroyed! 173938625Srvb */ 174038625Srvb ENTRY; 174138625Srvb 174238625Srvb if (IS_UNMOUNTING(cp)) { 174338625Srvb#ifdef DEBUG 174438625Srvb if (VTOC(vp)->c_ovp) { 174538625Srvb if (IS_UNMOUNTING(cp)) 174639085Srvb printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp); 174738625Srvb } 174838625Srvb#endif 174938625Srvb } else { 175039650Srvb#ifdef OLD_DIAGNOSTIC 175138625Srvb if (vp->v_usecount != 0) 175239650Srvb print("coda_reclaim: pushing active %p\n", vp); 175338625Srvb if (VTOC(vp)->c_ovp) { 175439085Srvb panic("coda_reclaim: c_ovp not void"); 175538625Srvb } 175639650Srvb#endif 175738625Srvb } 175838625Srvb cache_purge(vp); 175966615Sjasone lockdestroy(&(VTOC(vp)->c_lock)); 176039085Srvb coda_free(VTOC(vp)); 176138625Srvb VTOC(vp) = NULL; 176238625Srvb return (0); 176338625Srvb} 176438625Srvb 176538625Srvbint 176639085Srvbcoda_lock(v) 176738625Srvb void *v; 176838625Srvb{ 176938625Srvb/* true args */ 177038625Srvb struct vop_lock_args *ap = v; 177138625Srvb struct vnode *vp = ap->a_vp; 177238625Srvb struct cnode *cp = VTOC(vp); 177338625Srvb struct proc *p = ap->a_p; 177438625Srvb/* upcall decl */ 177538625Srvb/* locals */ 177638625Srvb 177738625Srvb ENTRY; 177838625Srvb 177939085Srvb if (coda_lockdebug) { 178038625Srvb myprintf(("Attempting lock on %lx.%lx.%lx\n", 178138625Srvb cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 178238625Srvb } 178338625Srvb 178442900Seivind#ifndef DEBUG_LOCKS 178538759Srvb return (lockmgr(&cp->c_lock, ap->a_flags, &vp->v_interlock, p)); 178642900Seivind#else 178742900Seivind return (debuglockmgr(&cp->c_lock, ap->a_flags, &vp->v_interlock, p, 178842900Seivind "coda_lock", vp->filename, vp->line)); 178942900Seivind#endif 179038625Srvb} 179138625Srvb 179238625Srvbint 179339085Srvbcoda_unlock(v) 179438625Srvb void *v; 179538625Srvb{ 179638625Srvb/* true args */ 179738625Srvb struct vop_unlock_args *ap = v; 179838625Srvb struct vnode *vp = ap->a_vp; 179938625Srvb struct cnode *cp = VTOC(vp); 180038625Srvb struct proc *p = ap->a_p; 180138625Srvb/* upcall decl */ 180238625Srvb/* locals */ 180338625Srvb 180438625Srvb ENTRY; 180539085Srvb if (coda_lockdebug) { 180638625Srvb myprintf(("Attempting unlock on %lx.%lx.%lx\n", 180738625Srvb cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 180838625Srvb } 180938625Srvb 181038759Srvb return (lockmgr(&cp->c_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock, p)); 181138625Srvb} 181238625Srvb 181338625Srvbint 181439085Srvbcoda_islocked(v) 181538625Srvb void *v; 181638625Srvb{ 181738625Srvb/* true args */ 181838625Srvb struct vop_islocked_args *ap = v; 181938625Srvb struct cnode *cp = VTOC(ap->a_vp); 182038625Srvb ENTRY; 182138625Srvb 182254444Seivind return (lockstatus(&cp->c_lock, ap->a_p)); 182338625Srvb} 182438625Srvb 182538625Srvb/* How one looks up a vnode given a device/inode pair: */ 182638625Srvbint 182739085Srvbcoda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp) 182838625Srvb{ 182938625Srvb /* This is like VFS_VGET() or igetinode()! */ 183038625Srvb int error; 183138625Srvb struct mount *mp; 183238625Srvb 183338625Srvb if (!(mp = devtomp(dev))) { 183449524Sbde myprintf(("coda_grab_vnode: devtomp(%#lx) returns NULL\n", 183549524Sbde (u_long)dev2udev(dev))); 183638625Srvb return(ENXIO); 183738625Srvb } 183838625Srvb 183938625Srvb /* XXX - ensure that nonzero-return means failure */ 184038625Srvb error = VFS_VGET(mp,ino,vpp); 184138625Srvb if (error) { 184249524Sbde myprintf(("coda_grab_vnode: iget/vget(%lx, %lu) returns %p, err %d\n", 184349524Sbde (u_long)dev2udev(dev), (u_long)ino, (void *)*vpp, error)); 184438625Srvb return(ENOENT); 184538625Srvb } 184638625Srvb return(0); 184738625Srvb} 184838625Srvb 184938625Srvbvoid 185038625Srvbprint_vattr( attr ) 185138625Srvb struct vattr *attr; 185238625Srvb{ 185338625Srvb char *typestr; 185438625Srvb 185538625Srvb switch (attr->va_type) { 185638625Srvb case VNON: 185738625Srvb typestr = "VNON"; 185838625Srvb break; 185938625Srvb case VREG: 186038625Srvb typestr = "VREG"; 186138625Srvb break; 186238625Srvb case VDIR: 186338625Srvb typestr = "VDIR"; 186438625Srvb break; 186538625Srvb case VBLK: 186638625Srvb typestr = "VBLK"; 186738625Srvb break; 186838625Srvb case VCHR: 186938625Srvb typestr = "VCHR"; 187038625Srvb break; 187138625Srvb case VLNK: 187238625Srvb typestr = "VLNK"; 187338625Srvb break; 187438625Srvb case VSOCK: 187538625Srvb typestr = "VSCK"; 187638625Srvb break; 187738625Srvb case VFIFO: 187838625Srvb typestr = "VFFO"; 187938625Srvb break; 188038625Srvb case VBAD: 188138625Srvb typestr = "VBAD"; 188238625Srvb break; 188338625Srvb default: 188438625Srvb typestr = "????"; 188538625Srvb break; 188638625Srvb } 188738625Srvb 188838625Srvb 188938625Srvb myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", 189038625Srvb typestr, (int)attr->va_mode, (int)attr->va_uid, 189138625Srvb (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); 189238625Srvb 189338625Srvb myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", 189438625Srvb (int)attr->va_fileid, (int)attr->va_nlink, 189538625Srvb (int)attr->va_size, 189638625Srvb (int)attr->va_blocksize,(int)attr->va_bytes)); 189738625Srvb myprintf((" gen %ld flags %ld vaflags %d\n", 189838625Srvb attr->va_gen, attr->va_flags, attr->va_vaflags)); 189938625Srvb myprintf((" atime sec %d nsec %d\n", 190038625Srvb (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); 190138625Srvb myprintf((" mtime sec %d nsec %d\n", 190238625Srvb (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); 190338625Srvb myprintf((" ctime sec %d nsec %d\n", 190438625Srvb (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); 190538625Srvb} 190638625Srvb 190738625Srvb/* How to print a ucred */ 190838625Srvbvoid 190938625Srvbprint_cred(cred) 191038625Srvb struct ucred *cred; 191138625Srvb{ 191238625Srvb 191338625Srvb int i; 191438625Srvb 191538625Srvb myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid)); 191638625Srvb 191738625Srvb for (i=0; i < cred->cr_ngroups; i++) 191838625Srvb myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i])); 191938625Srvb myprintf(("\n")); 192038625Srvb 192138625Srvb} 192238625Srvb 192338625Srvb/* 192438625Srvb * Return a vnode for the given fid. 192538625Srvb * If no cnode exists for this fid create one and put it 192638625Srvb * in a table hashed by fid.Volume and fid.Vnode. If the cnode for 192738625Srvb * this fid is already in the table return it (ref count is 192839085Srvb * incremented by coda_find. The cnode will be flushed from the 192939085Srvb * table when coda_inactive calls coda_unsave. 193038625Srvb */ 193138625Srvbstruct cnode * 193239085Srvbmake_coda_node(fid, vfsp, type) 193338625Srvb ViceFid *fid; struct mount *vfsp; short type; 193438625Srvb{ 193538625Srvb struct cnode *cp; 193638625Srvb int err; 193738625Srvb 193839085Srvb if ((cp = coda_find(fid)) == NULL) { 193938625Srvb struct vnode *vp; 194038625Srvb 194139085Srvb cp = coda_alloc(); 194238625Srvb lockinit(&cp->c_lock, PINOD, "cnode", 0, 0); 194338625Srvb cp->c_fid = *fid; 194438625Srvb 194539085Srvb err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp); 194638625Srvb if (err) { 194739085Srvb panic("coda: getnewvnode returned error %d\n", err); 194838625Srvb } 194938625Srvb vp->v_data = cp; 195038625Srvb vp->v_type = type; 195138625Srvb cp->c_vnode = vp; 195239085Srvb coda_save(cp); 195338625Srvb 195438625Srvb } else { 195538625Srvb vref(CTOV(cp)); 195638625Srvb } 195738625Srvb 195838625Srvb return cp; 195938625Srvb} 1960