coda_vnops.c revision 39728
1/* 2 * 3 * Coda: an Experimental Distributed File System 4 * Release 3.1 5 * 6 * Copyright (c) 1987-1998 Carnegie Mellon University 7 * All Rights Reserved 8 * 9 * Permission to use, copy, modify and distribute this software and its 10 * documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation, and 14 * that credit is given to Carnegie Mellon University in all documents 15 * and publicity pertaining to direct or indirect use of this code or its 16 * derivatives. 17 * 18 * CODA IS AN EXPERIMENTAL SOFTWARE SYSTEM AND IS KNOWN TO HAVE BUGS, 19 * SOME OF WHICH MAY HAVE SERIOUS CONSEQUENCES. CARNEGIE MELLON ALLOWS 20 * FREE USE OF THIS SOFTWARE IN ITS "AS IS" CONDITION. CARNEGIE MELLON 21 * DISCLAIMS ANY LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER 22 * RESULTING DIRECTLY OR INDIRECTLY FROM THE USE OF THIS SOFTWARE OR OF 23 * ANY DERIVATIVE WORK. 24 * 25 * Carnegie Mellon encourages users of this software to return any 26 * improvements or extensions that they make, and to grant Carnegie 27 * Mellon the rights to redistribute these changes without encumbrance. 28 * 29 * @(#) src/sys/coda/coda_vnops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $ 30 * $Id: coda_vnops.c,v 1.5 1998/09/25 17:38:32 rvb Exp $ 31 * 32 */ 33 34/* 35 * Mach Operating System 36 * Copyright (c) 1990 Carnegie-Mellon University 37 * Copyright (c) 1989 Carnegie-Mellon University 38 * All rights reserved. The CMU software License Agreement specifies 39 * the terms and conditions for use and redistribution. 40 */ 41 42/* 43 * This code was written for the Coda file system at Carnegie Mellon 44 * University. Contributers include David Steere, James Kistler, and 45 * M. Satyanarayanan. 46 */ 47 48/* 49 * HISTORY 50 * $Log: coda_vnops.c,v $ 51 * Revision 1.5 1998/09/25 17:38:32 rvb 52 * Put "stray" printouts under DIAGNOSTIC. Make everything build 53 * with DEBUG on. Add support for lkm. (The macro's don't work 54 * for me; for a good chuckle look at the end of coda_fbsd.c.) 55 * 56 * Revision 1.4 1998/09/13 13:57:59 rvb 57 * Finish conversion of cfs -> coda 58 * 59 * Revision 1.3 1998/09/11 18:50:17 rvb 60 * All the references to cfs, in symbols, structs, and strings 61 * have been changed to coda. (Same for CFS.) 62 * 63 * Revision 1.2 1998/09/02 19:09:53 rvb 64 * Pass2 complete 65 * 66 * Revision 1.1.1.1 1998/08/29 21:14:52 rvb 67 * Very Preliminary Coda 68 * 69 * Revision 1.12 1998/08/28 18:28:00 rvb 70 * NetBSD -current is stricter! 71 * 72 * Revision 1.11 1998/08/28 18:12:23 rvb 73 * Now it also works on FreeBSD -current. This code will be 74 * committed to the FreeBSD -current and NetBSD -current 75 * trees. It will then be tailored to the particular platform 76 * by flushing conditional code. 77 * 78 * Revision 1.10 1998/08/18 17:05:21 rvb 79 * Don't use __RCSID now 80 * 81 * Revision 1.9 1998/08/18 16:31:46 rvb 82 * Sync the code for NetBSD -current; test on 1.3 later 83 * 84 * Revision 1.8 98/02/24 22:22:50 rvb 85 * Fixes up mainly to flush iopen and friends 86 * 87 * Revision 1.7 98/01/31 20:53:15 rvb 88 * First version that works on FreeBSD 2.2.5 89 * 90 * Revision 1.6 98/01/23 11:53:47 rvb 91 * Bring RVB_CODA1_1 to HEAD 92 * 93 * Revision 1.5.2.8 98/01/23 11:21:11 rvb 94 * Sync with 2.2.5 95 * 96 * Revision 1.5.2.7 97/12/19 14:26:08 rvb 97 * session id 98 * 99 * Revision 1.5.2.6 97/12/16 22:01:34 rvb 100 * Oops add cfs_subr.h cfs_venus.h; sync with peter 101 * 102 * Revision 1.5.2.5 97/12/16 12:40:14 rvb 103 * Sync with 1.3 104 * 105 * Revision 1.5.2.4 97/12/10 14:08:31 rvb 106 * Fix O_ flags; check result in coda_call 107 * 108 * Revision 1.5.2.3 97/12/10 11:40:27 rvb 109 * No more ody 110 * 111 * Revision 1.5.2.2 97/12/09 16:07:15 rvb 112 * Sync with vfs/include/coda.h 113 * 114 * Revision 1.5.2.1 97/12/06 17:41:25 rvb 115 * Sync with peters coda.h 116 * 117 * Revision 1.5 97/12/05 10:39:23 rvb 118 * Read CHANGES 119 * 120 * Revision 1.4.14.10 97/11/25 08:08:48 rvb 121 * cfs_venus ... done; until cred/vattr change 122 * 123 * Revision 1.4.14.9 97/11/24 15:44:48 rvb 124 * Final cfs_venus.c w/o macros, but one locking bug 125 * 126 * Revision 1.4.14.8 97/11/21 11:28:04 rvb 127 * cfs_venus.c is done: first pass 128 * 129 * Revision 1.4.14.7 97/11/20 11:46:51 rvb 130 * Capture current cfs_venus 131 * 132 * Revision 1.4.14.6 97/11/18 10:27:19 rvb 133 * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c 134 * cfs_nb_foo and cfs_foo are joined 135 * 136 * Revision 1.4.14.5 97/11/13 22:03:03 rvb 137 * pass2 cfs_NetBSD.h mt 138 * 139 * Revision 1.4.14.4 97/11/12 12:09:42 rvb 140 * reorg pass1 141 * 142 * Revision 1.4.14.3 97/11/06 21:03:28 rvb 143 * don't include headers in headers 144 * 145 * Revision 1.4.14.2 97/10/29 16:06:30 rvb 146 * Kill DYING 147 * 148 * Revision 1.4.14.1 1997/10/28 23:10:18 rvb 149 * >64Meg; venus can be killed! 150 * 151 * Revision 1.4 1997/02/20 13:54:50 lily 152 * check for NULL return from coda_nc_lookup before CTOV 153 * 154 * Revision 1.3 1996/12/12 22:11:02 bnoble 155 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 156 * There may be more 157 * 158 * Revision 1.2 1996/01/02 16:57:07 bnoble 159 * Added support for Coda MiniCache and raw inode calls (final commit) 160 * 161 * Revision 1.1.2.1 1995/12/20 01:57:34 bnoble 162 * Added CODA-specific files 163 * 164 * Revision 3.1.1.1 1995/03/04 19:08:06 bnoble 165 * Branch for NetBSD port revisions 166 * 167 * Revision 3.1 1995/03/04 19:08:04 bnoble 168 * Bump to major revision 3 to prepare for NetBSD port 169 * 170 * Revision 2.6 1995/02/17 16:25:26 dcs 171 * These versions represent several changes: 172 * 1. Allow venus to restart even if outstanding references exist. 173 * 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d 174 * 3. Allow ody_expand to return many members, not just one. 175 * 176 * Revision 2.5 94/11/09 20:29:27 dcs 177 * Small bug in remove dealing with hard links and link counts was fixed. 178 * 179 * Revision 2.4 94/10/14 09:58:42 dcs 180 * Made changes 'cause sun4s have braindead compilers 181 * 182 * Revision 2.3 94/10/12 16:46:37 dcs 183 * Cleaned kernel/venus interface by removing XDR junk, plus 184 * so cleanup to allow this code to be more easily ported. 185 * 186 * Revision 2.2 94/09/20 14:12:41 dcs 187 * Fixed bug in rename when moving a directory. 188 * 189 * Revision 2.1 94/07/21 16:25:22 satya 190 * Conversion to C++ 3.0; start of Coda Release 2.0 191 * 192 * Revision 1.4 93/12/17 01:38:01 luqi 193 * Changes made for kernel to pass process info to Venus: 194 * 195 * (1) in file cfs.h 196 * add process id and process group id in most of the cfs argument types. 197 * 198 * (2) in file cfs_vnodeops.c 199 * add process info passing in most of the cfs vnode operations. 200 * 201 * (3) in file cfs_xdr.c 202 * expand xdr routines according changes in (1). 203 * add variable pass_process_info to allow venus for kernel version checking. 204 * 205 * Revision 1.3 93/05/28 16:24:33 bnoble 206 * *** empty log message *** 207 * 208 * Revision 1.2 92/10/27 17:58:25 lily 209 * merge kernel/latest and alpha/src/cfs 210 * 211 * Revision 2.4 92/09/30 14:16:37 mja 212 * Redid buffer allocation so that it does kmem_{alloc,free} for all 213 * architectures. Zone allocation, previously used on the 386, caused 214 * panics if it was invoked repeatedly. Stack allocation, previously 215 * used on all other architectures, tickled some Mach bug that appeared 216 * with large stack frames. 217 * [91/02/09 jjk] 218 * 219 * Added contributors blurb. 220 * [90/12/13 jjk] 221 * 222 * Revision 2.3 90/07/26 15:50:09 mrt 223 * Fixed fix to rename to remove .. from moved directories. 224 * [90/06/28 dcs] 225 * 226 * Revision 1.7 90/06/28 16:24:25 dcs 227 * Fixed bug with moving directories, we weren't flushing .. for the moved directory. 228 * 229 * Revision 1.6 90/05/31 17:01:47 dcs 230 * Prepare for merge with facilities kernel. 231 * 232 * 233 */ 234 235#include <sys/param.h> 236#include <sys/systm.h> 237#include <sys/kernel.h> 238#include <sys/proc.h> 239#include <sys/malloc.h> 240#include <sys/mount.h> 241#include <sys/errno.h> 242#include <sys/acct.h> 243#include <sys/file.h> 244#include <sys/fcntl.h> 245#include <sys/uio.h> 246#include <sys/namei.h> 247#include <sys/ioccom.h> 248#include <sys/select.h> 249 250#include <vm/vm.h> 251#include <vm/vm_object.h> 252#include <vm/vm_extern.h> 253#include <vm/vm_zone.h> 254 255#include <coda/coda.h> 256#include <coda/cnode.h> 257#include <coda/coda_vnops.h> 258#include <coda/coda_venus.h> 259#include <coda/coda_opstats.h> 260#include <coda/coda_subr.h> 261#include <coda/coda_namecache.h> 262#include <coda/coda_pioctl.h> 263 264/* 265 * These flags select various performance enhancements. 266 */ 267int coda_attr_cache = 1; /* Set to cache attributes in the kernel */ 268int coda_symlink_cache = 1; /* Set to cache symbolic link information */ 269int coda_access_cache = 1; /* Set to handle some access checks directly */ 270 271/* structure to keep track of vfs calls */ 272 273struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE]; 274 275#define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++) 276#define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++) 277#define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++) 278#define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++) 279 280/* What we are delaying for in printf */ 281int coda_printf_delay = 0; /* in microseconds */ 282int coda_vnop_print_entry = 0; 283static int coda_lockdebug = 0; 284 285/* Definition of the vfs operation vector */ 286 287/* 288 * Some NetBSD details: 289 * 290 * coda_start is called at the end of the mount syscall. 291 * coda_init is called at boot time. 292 */ 293 294#define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__FUNCTION__)) 295 296/* Definition of the vnode operation vector */ 297 298struct vnodeopv_entry_desc coda_vnodeop_entries[] = { 299 { &vop_default_desc, coda_vop_error }, 300 { &vop_lookup_desc, coda_lookup }, /* lookup */ 301 { &vop_create_desc, coda_create }, /* create */ 302 { &vop_mknod_desc, coda_vop_error }, /* mknod */ 303 { &vop_open_desc, coda_open }, /* open */ 304 { &vop_close_desc, coda_close }, /* close */ 305 { &vop_access_desc, coda_access }, /* access */ 306 { &vop_getattr_desc, coda_getattr }, /* getattr */ 307 { &vop_setattr_desc, coda_setattr }, /* setattr */ 308 { &vop_read_desc, coda_read }, /* read */ 309 { &vop_write_desc, coda_write }, /* write */ 310 { &vop_ioctl_desc, coda_ioctl }, /* ioctl */ 311 { &vop_mmap_desc, coda_vop_error }, /* mmap */ 312 { &vop_fsync_desc, coda_fsync }, /* fsync */ 313 { &vop_remove_desc, coda_remove }, /* remove */ 314 { &vop_link_desc, coda_link }, /* link */ 315 { &vop_rename_desc, coda_rename }, /* rename */ 316 { &vop_mkdir_desc, coda_mkdir }, /* mkdir */ 317 { &vop_rmdir_desc, coda_rmdir }, /* rmdir */ 318 { &vop_symlink_desc, coda_symlink }, /* symlink */ 319 { &vop_readdir_desc, coda_readdir }, /* readdir */ 320 { &vop_readlink_desc, coda_readlink }, /* readlink */ 321 { &vop_abortop_desc, coda_abortop }, /* abortop */ 322 { &vop_inactive_desc, coda_inactive }, /* inactive */ 323 { &vop_reclaim_desc, coda_reclaim }, /* reclaim */ 324 { &vop_lock_desc, coda_lock }, /* lock */ 325 { &vop_unlock_desc, coda_unlock }, /* unlock */ 326 { &vop_bmap_desc, coda_bmap }, /* bmap */ 327 { &vop_strategy_desc, coda_strategy }, /* strategy */ 328 { &vop_print_desc, coda_vop_error }, /* print */ 329 { &vop_islocked_desc, coda_islocked }, /* islocked */ 330 { &vop_pathconf_desc, coda_vop_error }, /* pathconf */ 331 { &vop_advlock_desc, coda_vop_nop }, /* advlock */ 332 { &vop_bwrite_desc, coda_vop_error }, /* bwrite */ 333 { &vop_lease_desc, coda_vop_nop }, /* lease */ 334 { &vop_poll_desc, (vop_t *) vop_stdpoll }, 335 { &vop_getpages_desc, coda_fbsd_getpages }, /* pager intf.*/ 336 { &vop_putpages_desc, coda_fbsd_putpages }, /* pager intf.*/ 337 338#if 0 339 340 we need to define these someday 341#define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd) 342#define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd) 343#define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc) 344#define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee) 345#define UFS_UPDATE(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_update(aa, bb, cc, dd) 346 347 missing 348 { &vop_reallocblks_desc, (vop_t *) ufs_missingop }, 349 { &vop_cachedlookup_desc, (vop_t *) ufs_lookup }, 350 { &vop_whiteout_desc, (vop_t *) ufs_whiteout }, 351#endif 352 { (struct vnodeop_desc*)NULL, (int(*)(void *))NULL } 353}; 354 355static struct vnodeopv_desc coda_vnodeop_opv_desc = 356 { &coda_vnodeop_p, coda_vnodeop_entries }; 357 358VNODEOP_SET(coda_vnodeop_opv_desc); 359 360/* A generic panic: we were called with something we didn't define yet */ 361int 362coda_vop_error(void *anon) { 363 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 364 365 myprintf(("Vnode operation %s called, but not defined\n", 366 (*desc)->vdesc_name)); 367 panic("coda_vop_error"); 368 return 0; 369} 370 371/* A generic do-nothing. For lease_check, advlock */ 372int 373coda_vop_nop(void *anon) { 374 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 375 376 if (codadebug) { 377 myprintf(("Vnode operation %s called, but unsupported\n", 378 (*desc)->vdesc_name)); 379 } 380 return (0); 381} 382 383int 384coda_vnodeopstats_init(void) 385{ 386 register int i; 387 388 for(i=0;i<CODA_VNODEOPS_SIZE;i++) { 389 coda_vnodeopstats[i].opcode = i; 390 coda_vnodeopstats[i].entries = 0; 391 coda_vnodeopstats[i].sat_intrn = 0; 392 coda_vnodeopstats[i].unsat_intrn = 0; 393 coda_vnodeopstats[i].gen_intrn = 0; 394 } 395 return 0; 396} 397 398/* 399 * coda_open calls Venus to return the device, inode pair of the cache 400 * file holding the data. Using iget, coda_open finds the vnode of the 401 * cache file, and then opens it. 402 */ 403int 404coda_open(v) 405 void *v; 406{ 407 /* 408 * NetBSD can pass the O_EXCL flag in mode, even though the check 409 * has already happened. Venus defensively assumes that if open 410 * is passed the EXCL, it must be a bug. We strip the flag here. 411 */ 412/* true args */ 413 struct vop_open_args *ap = v; 414 register struct vnode **vpp = &(ap->a_vp); 415 struct cnode *cp = VTOC(*vpp); 416 int flag = ap->a_mode & (~O_EXCL); 417 struct ucred *cred = ap->a_cred; 418 struct proc *p = ap->a_p; 419/* locals */ 420 int error; 421 struct vnode *vp; 422 dev_t dev; 423 ino_t inode; 424 425 MARK_ENTRY(CODA_OPEN_STATS); 426 427 /* Check for open of control file. */ 428 if (IS_CTL_VP(*vpp)) { 429 /* XXX */ 430 /* if (WRITEABLE(flag)) */ 431 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) { 432 MARK_INT_FAIL(CODA_OPEN_STATS); 433 return(EACCES); 434 } 435 MARK_INT_SAT(CODA_OPEN_STATS); 436 return(0); 437 } 438 439 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, p, &dev, &inode); 440 if (error) 441 return (error); 442 if (!error) { 443 CODADEBUG( CODA_OPEN,myprintf(("open: dev %d inode %d result %d\n", 444 dev, inode, error)); ) 445 } 446 447 /* Translate the <device, inode> pair for the cache file into 448 an inode pointer. */ 449 error = coda_grab_vnode(dev, inode, &vp); 450 if (error) 451 return (error); 452 453 /* We get the vnode back locked. Needs unlocked */ 454 VOP_UNLOCK(vp, 0, p); 455 /* Keep a reference until the close comes in. */ 456 vref(*vpp); 457 458 /* Save the vnode pointer for the cache file. */ 459 if (cp->c_ovp == NULL) { 460 cp->c_ovp = vp; 461 } else { 462 if (cp->c_ovp != vp) 463 panic("coda_open: cp->c_ovp != ITOV(ip)"); 464 } 465 cp->c_ocount++; 466 467 /* Flush the attribute cached if writing the file. */ 468 if (flag & FWRITE) { 469 cp->c_owrite++; 470 cp->c_flags &= ~C_VATTR; 471 } 472 473 /* Save the <device, inode> pair for the cache file to speed 474 up subsequent page_read's. */ 475 cp->c_device = dev; 476 cp->c_inode = inode; 477 478 /* Open the cache file. */ 479 error = VOP_OPEN(vp, flag, cred, p); 480 if (error) { 481 printf("coda_open: VOP_OPEN on container failed %d\n", error); 482 return (error); 483 } 484/* grab (above) does this when it calls newvnode unless it's in the cache*/ 485 if (vp->v_type == VREG) { 486 error = vfs_object_create(vp, p, cred, 1); 487 if (error != 0) { 488 printf("coda_open: vfs_object_create() returns %d\n", error); 489 vput(vp); 490 } 491 } 492 493 return(error); 494} 495 496/* 497 * Close the cache file used for I/O and notify Venus. 498 */ 499int 500coda_close(v) 501 void *v; 502{ 503/* true args */ 504 struct vop_close_args *ap = v; 505 struct vnode *vp = ap->a_vp; 506 struct cnode *cp = VTOC(vp); 507 int flag = ap->a_fflag; 508 struct ucred *cred = ap->a_cred; 509 struct proc *p = ap->a_p; 510/* locals */ 511 int error; 512 513 MARK_ENTRY(CODA_CLOSE_STATS); 514 515 /* Check for close of control file. */ 516 if (IS_CTL_VP(vp)) { 517 MARK_INT_SAT(CODA_CLOSE_STATS); 518 return(0); 519 } 520 521 if (IS_UNMOUNTING(cp)) { 522 if (cp->c_ovp) { 523#ifdef CODA_VERBOSE 524 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n", 525 vp->v_usecount, cp->c_ovp, vp, cp); 526#endif 527 vgone(cp->c_ovp); 528 } else { 529#ifdef CODA_VERBOSE 530 printf("coda_close: NO container vp %p/cp %p\n", vp, cp); 531#endif 532 } 533 return ENODEV; 534 } else { 535 VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 536 vrele(cp->c_ovp); 537 } 538 539 if (--cp->c_ocount == 0) 540 cp->c_ovp = NULL; 541 542 if (flag & FWRITE) /* file was opened for write */ 543 --cp->c_owrite; 544 545 error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, p); 546 vrele(CTOV(cp)); 547 548 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); ) 549 return(error); 550} 551 552int 553coda_read(v) 554 void *v; 555{ 556 struct vop_read_args *ap = v; 557 558 ENTRY; 559 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ, 560 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 561} 562 563int 564coda_write(v) 565 void *v; 566{ 567 struct vop_write_args *ap = v; 568 569 ENTRY; 570 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE, 571 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 572} 573 574int 575coda_rdwr(vp, uiop, rw, ioflag, cred, p) 576 struct vnode *vp; 577 struct uio *uiop; 578 enum uio_rw rw; 579 int ioflag; 580 struct ucred *cred; 581 struct proc *p; 582{ 583/* upcall decl */ 584 /* NOTE: container file operation!!! */ 585/* locals */ 586 struct cnode *cp = VTOC(vp); 587 struct vnode *cfvp = cp->c_ovp; 588 int igot_internally = 0; 589 int opened_internally = 0; 590 int error = 0; 591 592 MARK_ENTRY(CODA_RDWR_STATS); 593 594 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %d, %qd, %d)\n", rw, 595 uiop->uio_iov->iov_base, uiop->uio_resid, 596 uiop->uio_offset, uiop->uio_segflg)); ) 597 598 /* Check for rdwr of control object. */ 599 if (IS_CTL_VP(vp)) { 600 MARK_INT_FAIL(CODA_RDWR_STATS); 601 return(EINVAL); 602 } 603 604 /* 605 * If file is not already open this must be a page 606 * {read,write} request. Iget the cache file's inode 607 * pointer if we still have its <device, inode> pair. 608 * Otherwise, we must do an internal open to derive the 609 * pair. 610 */ 611 if (cfvp == NULL) { 612 /* 613 * If we're dumping core, do the internal open. Otherwise 614 * venus won't have the correct size of the core when 615 * it's completely written. 616 */ 617 if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 618 igot_internally = 1; 619 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp); 620 if (error) { 621 MARK_INT_FAIL(CODA_RDWR_STATS); 622 return(error); 623 } 624 /* 625 * We get the vnode back locked in both Mach and 626 * NetBSD. Needs unlocked 627 */ 628 VOP_UNLOCK(cfvp, 0, p); 629 } 630 else { 631 opened_internally = 1; 632 MARK_INT_GEN(CODA_OPEN_STATS); 633 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), 634 cred, p); 635printf("coda_rdwr: Internally Opening %p\n", vp); 636 if (error) { 637 printf("coda_rdwr: VOP_OPEN on container failed %d\n", error); 638 return (error); 639 } 640 if (vp->v_type == VREG) { 641 error = vfs_object_create(vp, p, cred, 1); 642 if (error != 0) { 643 printf("coda_rdwr: vfs_object_create() returns %d\n", error); 644 vput(vp); 645 } 646 } 647 if (error) { 648 MARK_INT_FAIL(CODA_RDWR_STATS); 649 return(error); 650 } 651 cfvp = cp->c_ovp; 652 } 653 } 654 655 /* Have UFS handle the call. */ 656 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n", 657 cp->c_fid.Volume, cp->c_fid.Vnode, 658 cp->c_fid.Unique, CTOV(cp)->v_usecount)); ) 659 660 661 if (rw == UIO_READ) { 662 error = VOP_READ(cfvp, uiop, ioflag, cred); 663 } else { 664 error = VOP_WRITE(cfvp, uiop, ioflag, cred); 665 /* ufs_write updates the vnode_pager_setsize for the vnode/object */ 666 667 { struct vattr attr; 668 669 if (VOP_GETATTR(cfvp, &attr, cred, p) == 0) { 670 vnode_pager_setsize(vp, attr.va_size); 671 } 672 } 673 } 674 675 if (error) 676 MARK_INT_FAIL(CODA_RDWR_STATS); 677 else 678 MARK_INT_SAT(CODA_RDWR_STATS); 679 680 /* Do an internal close if necessary. */ 681 if (opened_internally) { 682 MARK_INT_GEN(CODA_CLOSE_STATS); 683 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, p); 684 } 685 686 /* Invalidate cached attributes if writing. */ 687 if (rw == UIO_WRITE) 688 cp->c_flags &= ~C_VATTR; 689 return(error); 690} 691 692int 693coda_ioctl(v) 694 void *v; 695{ 696/* true args */ 697 struct vop_ioctl_args *ap = v; 698 struct vnode *vp = ap->a_vp; 699 int com = ap->a_command; 700 caddr_t data = ap->a_data; 701 int flag = ap->a_fflag; 702 struct ucred *cred = ap->a_cred; 703 struct proc *p = ap->a_p; 704/* locals */ 705 int error; 706 struct vnode *tvp; 707 struct nameidata ndp; 708 struct PioctlData *iap = (struct PioctlData *)data; 709 710 MARK_ENTRY(CODA_IOCTL_STATS); 711 712 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));) 713 714 /* Don't check for operation on a dying object, for ctlvp it 715 shouldn't matter */ 716 717 /* Must be control object to succeed. */ 718 if (!IS_CTL_VP(vp)) { 719 MARK_INT_FAIL(CODA_IOCTL_STATS); 720 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));) 721 return (EOPNOTSUPP); 722 } 723 /* Look up the pathname. */ 724 725 /* Should we use the name cache here? It would get it from 726 lookupname sooner or later anyway, right? */ 727 728 NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, ((caddr_t)iap->path), p); 729 error = namei(&ndp); 730 tvp = ndp.ni_vp; 731 732 if (error) { 733 MARK_INT_FAIL(CODA_IOCTL_STATS); 734 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n", 735 error));) 736 return(error); 737 } 738 739 /* 740 * Make sure this is a coda style cnode, but it may be a 741 * different vfsp 742 */ 743 /* XXX: this totally violates the comment about vtagtype in vnode.h */ 744 if (tvp->v_tag != VT_CODA) { 745 vrele(tvp); 746 MARK_INT_FAIL(CODA_IOCTL_STATS); 747 CODADEBUG(CODA_IOCTL, 748 myprintf(("coda_ioctl error: %s not a coda object\n", 749 iap->path));) 750 return(EINVAL); 751 } 752 753 if (iap->vi.in_size > VC_MAXDATASIZE) { 754 vrele(tvp); 755 return(EINVAL); 756 } 757 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, p); 758 759 if (error) 760 MARK_INT_FAIL(CODA_IOCTL_STATS); 761 else 762 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) 763 764 vrele(tvp); 765 return(error); 766} 767 768/* 769 * To reduce the cost of a user-level venus;we cache attributes in 770 * the kernel. Each cnode has storage allocated for an attribute. If 771 * c_vattr is valid, return a reference to it. Otherwise, get the 772 * attributes from venus and store them in the cnode. There is some 773 * question if this method is a security leak. But I think that in 774 * order to make this call, the user must have done a lookup and 775 * opened the file, and therefore should already have access. 776 */ 777int 778coda_getattr(v) 779 void *v; 780{ 781/* true args */ 782 struct vop_getattr_args *ap = v; 783 struct vnode *vp = ap->a_vp; 784 struct cnode *cp = VTOC(vp); 785 struct vattr *vap = ap->a_vap; 786 struct ucred *cred = ap->a_cred; 787 struct proc *p = ap->a_p; 788/* locals */ 789 int error; 790 791 MARK_ENTRY(CODA_GETATTR_STATS); 792 793 if (IS_UNMOUNTING(cp)) 794 return ENODEV; 795 796 /* Check for getattr of control object. */ 797 if (IS_CTL_VP(vp)) { 798 MARK_INT_FAIL(CODA_GETATTR_STATS); 799 return(ENOENT); 800 } 801 802 /* Check to see if the attributes have already been cached */ 803 if (VALID_VATTR(cp)) { 804 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n", 805 cp->c_fid.Volume, 806 cp->c_fid.Vnode, 807 cp->c_fid.Unique));}); 808 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 809 print_vattr(&cp->c_vattr); ); 810 811 *vap = cp->c_vattr; 812 MARK_INT_SAT(CODA_GETATTR_STATS); 813 return(0); 814 } 815 816 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, p, vap); 817 818 if (!error) { 819 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n", 820 cp->c_fid.Volume, 821 cp->c_fid.Vnode, 822 cp->c_fid.Unique, 823 error)); ) 824 825 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 826 print_vattr(vap); ); 827 828 { int size = vap->va_size; 829 struct vnode *convp = cp->c_ovp; 830 if (convp != (struct vnode *)0) { 831 vnode_pager_setsize(convp, size); 832 } 833 } 834 /* If not open for write, store attributes in cnode */ 835 if ((cp->c_owrite == 0) && (coda_attr_cache)) { 836 cp->c_vattr = *vap; 837 cp->c_flags |= C_VATTR; 838 } 839 840 } 841 return(error); 842} 843 844int 845coda_setattr(v) 846 void *v; 847{ 848/* true args */ 849 struct vop_setattr_args *ap = v; 850 register struct vnode *vp = ap->a_vp; 851 struct cnode *cp = VTOC(vp); 852 register struct vattr *vap = ap->a_vap; 853 struct ucred *cred = ap->a_cred; 854 struct proc *p = ap->a_p; 855/* locals */ 856 int error; 857 858 MARK_ENTRY(CODA_SETATTR_STATS); 859 860 /* Check for setattr of control object. */ 861 if (IS_CTL_VP(vp)) { 862 MARK_INT_FAIL(CODA_SETATTR_STATS); 863 return(ENOENT); 864 } 865 866 if (codadebug & CODADBGMSK(CODA_SETATTR)) { 867 print_vattr(vap); 868 } 869 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, p); 870 871 if (!error) 872 cp->c_flags &= ~C_VATTR; 873 874 { int size = vap->va_size; 875 struct vnode *convp = cp->c_ovp; 876 if (size != VNOVAL && convp != (struct vnode *)0) { 877 vnode_pager_setsize(convp, size); 878 } 879 } 880 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); ) 881 return(error); 882} 883 884int 885coda_access(v) 886 void *v; 887{ 888/* true args */ 889 struct vop_access_args *ap = v; 890 struct vnode *vp = ap->a_vp; 891 struct cnode *cp = VTOC(vp); 892 int mode = ap->a_mode; 893 struct ucred *cred = ap->a_cred; 894 struct proc *p = ap->a_p; 895/* locals */ 896 int error; 897 898 MARK_ENTRY(CODA_ACCESS_STATS); 899 900 /* Check for access of control object. Only read access is 901 allowed on it. */ 902 if (IS_CTL_VP(vp)) { 903 /* bogus hack - all will be marked as successes */ 904 MARK_INT_SAT(CODA_ACCESS_STATS); 905 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 906 ? 0 : EACCES); 907 } 908 909 /* 910 * if the file is a directory, and we are checking exec (eg lookup) 911 * access, and the file is in the namecache, then the user must have 912 * lookup access to it. 913 */ 914 if (coda_access_cache) { 915 if ((vp->v_type == VDIR) && (mode & VEXEC)) { 916 if (coda_nc_lookup(cp, ".", 1, cred)) { 917 MARK_INT_SAT(CODA_ACCESS_STATS); 918 return(0); /* it was in the cache */ 919 } 920 } 921 } 922 923 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, p); 924 925 return(error); 926} 927 928/* 929 * CODA abort op, called after namei() when a CREATE/DELETE isn't actually 930 * done. If a buffer has been saved in anticipation of a coda_create or 931 * a coda_remove, delete it. 932 */ 933/* ARGSUSED */ 934int 935coda_abortop(v) 936 void *v; 937{ 938/* true args */ 939 struct vop_abortop_args /* { 940 struct vnode *a_dvp; 941 struct componentname *a_cnp; 942 } */ *ap = v; 943/* upcall decl */ 944/* locals */ 945 946 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 947 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 948 return (0); 949} 950 951int 952coda_readlink(v) 953 void *v; 954{ 955/* true args */ 956 struct vop_readlink_args *ap = v; 957 struct vnode *vp = ap->a_vp; 958 struct cnode *cp = VTOC(vp); 959 struct uio *uiop = ap->a_uio; 960 struct ucred *cred = ap->a_cred; 961 struct proc *p = ap->a_uio->uio_procp; 962/* locals */ 963 int error; 964 char *str; 965 int len; 966 967 MARK_ENTRY(CODA_READLINK_STATS); 968 969 /* Check for readlink of control object. */ 970 if (IS_CTL_VP(vp)) { 971 MARK_INT_FAIL(CODA_READLINK_STATS); 972 return(ENOENT); 973 } 974 975 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ 976 uiop->uio_rw = UIO_READ; 977 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); 978 if (error) 979 MARK_INT_FAIL(CODA_READLINK_STATS); 980 else 981 MARK_INT_SAT(CODA_READLINK_STATS); 982 return(error); 983 } 984 985 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, p, &str, &len); 986 987 if (!error) { 988 uiop->uio_rw = UIO_READ; 989 error = uiomove(str, len, uiop); 990 991 if (coda_symlink_cache) { 992 cp->c_symlink = str; 993 cp->c_symlen = len; 994 cp->c_flags |= C_SYMLINK; 995 } else 996 CODA_FREE(str, len); 997 } 998 999 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) 1000 return(error); 1001} 1002 1003int 1004coda_fsync(v) 1005 void *v; 1006{ 1007/* true args */ 1008 struct vop_fsync_args *ap = v; 1009 struct vnode *vp = ap->a_vp; 1010 struct cnode *cp = VTOC(vp); 1011 struct ucred *cred = ap->a_cred; 1012 struct proc *p = ap->a_p; 1013/* locals */ 1014 struct vnode *convp = cp->c_ovp; 1015 int error; 1016 1017 MARK_ENTRY(CODA_FSYNC_STATS); 1018 1019 /* Check for fsync on an unmounting object */ 1020 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync 1021 * after an unmount has been initiated. This is a Bad Thing, 1022 * which we have to avoid. Not a legitimate failure for stats. 1023 */ 1024 if (IS_UNMOUNTING(cp)) { 1025 return(ENODEV); 1026 } 1027 1028 /* Check for fsync of control object. */ 1029 if (IS_CTL_VP(vp)) { 1030 MARK_INT_SAT(CODA_FSYNC_STATS); 1031 return(0); 1032 } 1033 1034 if (convp) 1035 VOP_FSYNC(convp, cred, MNT_WAIT, p); 1036 1037 /* 1038 * We see fsyncs with usecount == 1 then usecount == 0. 1039 * For now we ignore them. 1040 */ 1041 /* 1042 if (!vp->v_usecount) { 1043 printf("coda_fsync on vnode %p with %d usecount. c_flags = %x (%x)\n", 1044 vp, vp->v_usecount, cp->c_flags, cp->c_flags&C_PURGING); 1045 } 1046 */ 1047 1048 /* 1049 * We can expect fsync on any vnode at all if venus is pruging it. 1050 * Venus can't very well answer the fsync request, now can it? 1051 * Hopefully, it won't have to, because hopefully, venus preserves 1052 * the (possibly untrue) invariant that it never purges an open 1053 * vnode. Hopefully. 1054 */ 1055 if (cp->c_flags & C_PURGING) { 1056 return(0); 1057 } 1058 1059 /* needs research */ 1060 return 0; 1061 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, p); 1062 1063 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ); 1064 return(error); 1065} 1066 1067int 1068coda_inactive(v) 1069 void *v; 1070{ 1071 /* XXX - at the moment, inactive doesn't look at cred, and doesn't 1072 have a proc pointer. Oops. */ 1073/* true args */ 1074 struct vop_inactive_args *ap = v; 1075 struct vnode *vp = ap->a_vp; 1076 struct cnode *cp = VTOC(vp); 1077 struct ucred *cred __attribute__((unused)) = NULL; 1078 struct proc *p __attribute__((unused)) = curproc; 1079/* upcall decl */ 1080/* locals */ 1081 1082 /* We don't need to send inactive to venus - DCS */ 1083 MARK_ENTRY(CODA_INACTIVE_STATS); 1084 1085 if (IS_CTL_VP(vp)) { 1086 MARK_INT_SAT(CODA_INACTIVE_STATS); 1087 return 0; 1088 } 1089 1090 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n", 1091 cp->c_fid.Volume, cp->c_fid.Vnode, 1092 cp->c_fid.Unique, vp->v_mount));) 1093 1094 /* If an array has been allocated to hold the symlink, deallocate it */ 1095 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { 1096 if (cp->c_symlink == NULL) 1097 panic("coda_inactive: null symlink pointer in cnode"); 1098 1099 CODA_FREE(cp->c_symlink, cp->c_symlen); 1100 cp->c_flags &= ~C_SYMLINK; 1101 cp->c_symlen = 0; 1102 } 1103 1104 /* Remove it from the table so it can't be found. */ 1105 coda_unsave(cp); 1106 if ((struct coda_mntinfo *)(vp->v_mount->mnt_data) == NULL) { 1107 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); 1108 panic("badness in coda_inactive\n"); 1109 } 1110 1111 if (IS_UNMOUNTING(cp)) { 1112#ifdef DEBUG 1113 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp); 1114 if (cp->c_ovp != NULL) 1115 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n", 1116 vp->v_usecount, vp, cp); 1117#endif 1118 lockmgr(&cp->c_lock, LK_RELEASE, &vp->v_interlock, p); 1119 } else { 1120#ifdef OLD_DIAGNOSTIC 1121 if (CTOV(cp)->v_usecount) { 1122 panic("coda_inactive: nonzero reference count"); 1123 } 1124 if (cp->c_ovp != NULL) { 1125 panic("coda_inactive: cp->ovp != NULL"); 1126 } 1127#endif 1128 VOP_UNLOCK(vp, 0, p); 1129 vgone(vp); 1130 } 1131 1132 MARK_INT_SAT(CODA_INACTIVE_STATS); 1133 return(0); 1134} 1135 1136/* 1137 * Remote file system operations having to do with directory manipulation. 1138 */ 1139 1140/* 1141 * It appears that in NetBSD, lookup is supposed to return the vnode locked 1142 */ 1143int 1144coda_lookup(v) 1145 void *v; 1146{ 1147/* true args */ 1148 struct vop_lookup_args *ap = v; 1149 struct vnode *dvp = ap->a_dvp; 1150 struct cnode *dcp = VTOC(dvp); 1151 struct vnode **vpp = ap->a_vpp; 1152 /* 1153 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest 1154 * of the string to xlate, and that we must try to get at least 1155 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I 1156 * could be wrong. 1157 */ 1158 struct componentname *cnp = ap->a_cnp; 1159 struct ucred *cred = cnp->cn_cred; 1160 struct proc *p = cnp->cn_proc; 1161/* locals */ 1162 struct cnode *cp; 1163 const char *nm = cnp->cn_nameptr; 1164 int len = cnp->cn_namelen; 1165 ViceFid VFid; 1166 int vtype; 1167 int error = 0; 1168 1169 MARK_ENTRY(CODA_LOOKUP_STATS); 1170 1171 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n", 1172 nm, dcp->c_fid.Volume, 1173 dcp->c_fid.Vnode, dcp->c_fid.Unique));); 1174 1175 /* Check for lookup of control object. */ 1176 if (IS_CTL_NAME(dvp, nm, len)) { 1177 *vpp = coda_ctlvp; 1178 vref(*vpp); 1179 MARK_INT_SAT(CODA_LOOKUP_STATS); 1180 goto exit; 1181 } 1182 1183 if (len+1 > CODA_MAXNAMLEN) { 1184 MARK_INT_FAIL(CODA_LOOKUP_STATS); 1185 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n", 1186 dcp->c_fid.Volume, dcp->c_fid.Vnode, 1187 dcp->c_fid.Unique, nm));); 1188 *vpp = (struct vnode *)0; 1189 error = EINVAL; 1190 goto exit; 1191 } 1192 /* First try to look the file up in the cfs name cache */ 1193 /* lock the parent vnode? */ 1194 cp = coda_nc_lookup(dcp, nm, len, cred); 1195 if (cp) { 1196 *vpp = CTOV(cp); 1197 vref(*vpp); 1198 CODADEBUG(CODA_LOOKUP, 1199 myprintf(("lookup result %d vpp %p\n",error,*vpp));) 1200 } else { 1201 1202 /* The name wasn't cached, so we need to contact Venus */ 1203 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, p, &VFid, &vtype); 1204 1205 if (error) { 1206 MARK_INT_FAIL(CODA_LOOKUP_STATS); 1207 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n", 1208 dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));) 1209 *vpp = (struct vnode *)0; 1210 } else { 1211 MARK_INT_SAT(CODA_LOOKUP_STATS); 1212 CODADEBUG(CODA_LOOKUP, 1213 myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n", 1214 VFid.Volume, VFid.Vnode, VFid.Unique, vtype, 1215 error)); ) 1216 1217 cp = make_coda_node(&VFid, dvp->v_mount, vtype); 1218 *vpp = CTOV(cp); 1219 1220 /* enter the new vnode in the Name Cache only if the top bit isn't set */ 1221 /* And don't enter a new vnode for an invalid one! */ 1222 if (!(vtype & CODA_NOCACHE)) 1223 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1224 } 1225 } 1226 1227 exit: 1228 /* 1229 * If we are creating, and this was the last name to be looked up, 1230 * and the error was ENOENT, then there really shouldn't be an 1231 * error and we can make the leaf NULL and return success. Since 1232 * this is supposed to work under Mach as well as NetBSD, we're 1233 * leaving this fn wrapped. We also must tell lookup/namei that 1234 * we need to save the last component of the name. (Create will 1235 * have to free the name buffer later...lucky us...) 1236 */ 1237 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) 1238 && (cnp->cn_flags & ISLASTCN) 1239 && (error == ENOENT)) 1240 { 1241 error = EJUSTRETURN; 1242 cnp->cn_flags |= SAVENAME; 1243 *ap->a_vpp = NULL; 1244 } 1245 1246 /* 1247 * If we are removing, and we are at the last element, and we 1248 * found it, then we need to keep the name around so that the 1249 * removal will go ahead as planned. Unfortunately, this will 1250 * probably also lock the to-be-removed vnode, which may or may 1251 * not be a good idea. I'll have to look at the bits of 1252 * coda_remove to make sure. We'll only save the name if we did in 1253 * fact find the name, otherwise coda_remove won't have a chance 1254 * to free the pathname. 1255 */ 1256 if ((cnp->cn_nameiop == DELETE) 1257 && (cnp->cn_flags & ISLASTCN) 1258 && !error) 1259 { 1260 cnp->cn_flags |= SAVENAME; 1261 } 1262 1263 /* 1264 * If the lookup went well, we need to (potentially?) unlock the 1265 * parent, and lock the child. We are only responsible for 1266 * checking to see if the parent is supposed to be unlocked before 1267 * we return. We must always lock the child (provided there is 1268 * one, and (the parent isn't locked or it isn't the same as the 1269 * parent.) Simple, huh? We can never leave the parent locked unless 1270 * we are ISLASTCN 1271 */ 1272 if (!error || (error == EJUSTRETURN)) { 1273 if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) { 1274 if ((error = VOP_UNLOCK(dvp, 0, p))) { 1275 return error; 1276 } 1277 /* 1278 * The parent is unlocked. As long as there is a child, 1279 * lock it without bothering to check anything else. 1280 */ 1281 if (*ap->a_vpp) { 1282 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 1283 printf("coda_lookup: "); 1284 panic("unlocked parent but couldn't lock child"); 1285 } 1286 } 1287 } else { 1288 /* The parent is locked, and may be the same as the child */ 1289 if (*ap->a_vpp && (*ap->a_vpp != dvp)) { 1290 /* Different, go ahead and lock it. */ 1291 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 1292 printf("coda_lookup: "); 1293 panic("unlocked parent but couldn't lock child"); 1294 } 1295 } 1296 } 1297 } else { 1298 /* If the lookup failed, we need to ensure that the leaf is NULL */ 1299 /* Don't change any locking? */ 1300 *ap->a_vpp = NULL; 1301 } 1302 return(error); 1303} 1304 1305/*ARGSUSED*/ 1306int 1307coda_create(v) 1308 void *v; 1309{ 1310/* true args */ 1311 struct vop_create_args *ap = v; 1312 struct vnode *dvp = ap->a_dvp; 1313 struct cnode *dcp = VTOC(dvp); 1314 struct vattr *va = ap->a_vap; 1315 int exclusive = 1; 1316 int mode = ap->a_vap->va_mode; 1317 struct vnode **vpp = ap->a_vpp; 1318 struct componentname *cnp = ap->a_cnp; 1319 struct ucred *cred = cnp->cn_cred; 1320 struct proc *p = cnp->cn_proc; 1321/* locals */ 1322 int error; 1323 struct cnode *cp; 1324 const char *nm = cnp->cn_nameptr; 1325 int len = cnp->cn_namelen; 1326 ViceFid VFid; 1327 struct vattr attr; 1328 1329 MARK_ENTRY(CODA_CREATE_STATS); 1330 1331 /* All creates are exclusive XXX */ 1332 /* I'm assuming the 'mode' argument is the file mode bits XXX */ 1333 1334 /* Check for create of control object. */ 1335 if (IS_CTL_NAME(dvp, nm, len)) { 1336 *vpp = (struct vnode *)0; 1337 MARK_INT_FAIL(CODA_CREATE_STATS); 1338 return(EACCES); 1339 } 1340 1341 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, p, &VFid, &attr); 1342 1343 if (!error) { 1344 1345 /* If this is an exclusive create, panic if the file already exists. */ 1346 /* Venus should have detected the file and reported EEXIST. */ 1347 1348 if ((exclusive == 1) && 1349 (coda_find(&VFid) != NULL)) 1350 panic("cnode existed for newly created file!"); 1351 1352 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); 1353 *vpp = CTOV(cp); 1354 1355 /* Update va to reflect the new attributes. */ 1356 (*va) = attr; 1357 1358 /* Update the attribute cache and mark it as valid */ 1359 if (coda_attr_cache) { 1360 VTOC(*vpp)->c_vattr = attr; 1361 VTOC(*vpp)->c_flags |= C_VATTR; 1362 } 1363 1364 /* Invalidate the parent's attr cache, the modification time has changed */ 1365 VTOC(dvp)->c_flags &= ~C_VATTR; 1366 1367 /* enter the new vnode in the Name Cache */ 1368 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1369 1370 CODADEBUG(CODA_CREATE, 1371 myprintf(("create: (%lx.%lx.%lx), result %d\n", 1372 VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 1373 } else { 1374 *vpp = (struct vnode *)0; 1375 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));) 1376 } 1377 1378 if (!error) { 1379 if (cnp->cn_flags & LOCKLEAF) { 1380 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 1381 printf("coda_create: "); 1382 panic("unlocked parent but couldn't lock child"); 1383 } 1384 } 1385#ifdef OLD_DIAGNOSTIC 1386 else { 1387 printf("coda_create: LOCKLEAF not set!\n"); 1388 } 1389#endif 1390 } 1391 /* Have to free the previously saved name */ 1392 /* 1393 * This condition is stolen from ufs_makeinode. I have no idea 1394 * why it's here, but what the hey... 1395 */ 1396 if ((cnp->cn_flags & SAVESTART) == 0) { 1397 zfree(namei_zone, cnp->cn_pnbuf); 1398 } 1399 return(error); 1400} 1401 1402int 1403coda_remove(v) 1404 void *v; 1405{ 1406/* true args */ 1407 struct vop_remove_args *ap = v; 1408 struct vnode *dvp = ap->a_dvp; 1409 struct cnode *cp = VTOC(dvp); 1410 struct componentname *cnp = ap->a_cnp; 1411 struct ucred *cred = cnp->cn_cred; 1412 struct proc *p = cnp->cn_proc; 1413/* locals */ 1414 int error; 1415 const char *nm = cnp->cn_nameptr; 1416 int len = cnp->cn_namelen; 1417 struct cnode *tp; 1418 1419 MARK_ENTRY(CODA_REMOVE_STATS); 1420 1421 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n", 1422 nm, cp->c_fid.Volume, cp->c_fid.Vnode, 1423 cp->c_fid.Unique));); 1424 1425 /* Remove the file's entry from the CODA Name Cache */ 1426 /* We're being conservative here, it might be that this person 1427 * doesn't really have sufficient access to delete the file 1428 * but we feel zapping the entry won't really hurt anyone -- dcs 1429 */ 1430 /* I'm gonna go out on a limb here. If a file and a hardlink to it 1431 * exist, and one is removed, the link count on the other will be 1432 * off by 1. We could either invalidate the attrs if cached, or 1433 * fix them. I'll try to fix them. DCS 11/8/94 1434 */ 1435 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); 1436 if (tp) { 1437 if (VALID_VATTR(tp)) { /* If attrs are cached */ 1438 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ 1439 tp->c_vattr.va_nlink--; 1440 } 1441 } 1442 1443 coda_nc_zapfile(VTOC(dvp), nm, len); 1444 /* No need to flush it if it doesn't exist! */ 1445 } 1446 /* Invalidate the parent's attr cache, the modification time has changed */ 1447 VTOC(dvp)->c_flags &= ~C_VATTR; 1448 1449 /* Check for remove of control object. */ 1450 if (IS_CTL_NAME(dvp, nm, len)) { 1451 MARK_INT_FAIL(CODA_REMOVE_STATS); 1452 return(ENOENT); 1453 } 1454 1455 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, p); 1456 1457 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) 1458 1459 if ((cnp->cn_flags & SAVESTART) == 0) { 1460 zfree(namei_zone, cnp->cn_pnbuf); 1461 } 1462 return(error); 1463} 1464 1465int 1466coda_link(v) 1467 void *v; 1468{ 1469/* true args */ 1470 struct vop_link_args *ap = v; 1471 struct vnode *vp = ap->a_vp; 1472 struct cnode *cp = VTOC(vp); 1473 struct vnode *tdvp = ap->a_tdvp; 1474 struct cnode *tdcp = VTOC(tdvp); 1475 struct componentname *cnp = ap->a_cnp; 1476 struct ucred *cred = cnp->cn_cred; 1477 struct proc *p = cnp->cn_proc; 1478/* locals */ 1479 int error; 1480 const char *nm = cnp->cn_nameptr; 1481 int len = cnp->cn_namelen; 1482 1483 MARK_ENTRY(CODA_LINK_STATS); 1484 1485 if (codadebug & CODADBGMSK(CODA_LINK)) { 1486 1487 myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n", 1488 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1489 myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n", 1490 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 1491 1492 } 1493 if (codadebug & CODADBGMSK(CODA_LINK)) { 1494 myprintf(("link: vp fid: (%lx.%lx.%lx)\n", 1495 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1496 myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n", 1497 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 1498 1499 } 1500 1501 /* Check for link to/from control object. */ 1502 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) { 1503 MARK_INT_FAIL(CODA_LINK_STATS); 1504 return(EACCES); 1505 } 1506 1507 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, p); 1508 1509 /* Invalidate the parent's attr cache, the modification time has changed */ 1510 VTOC(tdvp)->c_flags &= ~C_VATTR; 1511 VTOC(vp)->c_flags &= ~C_VATTR; 1512 1513 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) 1514 1515exit: 1516 1517 /* Drop the name buffer if we don't need to SAVESTART */ 1518 if ((cnp->cn_flags & SAVESTART) == 0) { 1519 zfree(namei_zone, cnp->cn_pnbuf); 1520 } 1521 return(error); 1522} 1523 1524int 1525coda_rename(v) 1526 void *v; 1527{ 1528/* true args */ 1529 struct vop_rename_args *ap = v; 1530 struct vnode *odvp = ap->a_fdvp; 1531 struct cnode *odcp = VTOC(odvp); 1532 struct componentname *fcnp = ap->a_fcnp; 1533 struct vnode *ndvp = ap->a_tdvp; 1534 struct cnode *ndcp = VTOC(ndvp); 1535 struct componentname *tcnp = ap->a_tcnp; 1536 struct ucred *cred = fcnp->cn_cred; 1537 struct proc *p = fcnp->cn_proc; 1538/* true args */ 1539 int error; 1540 const char *fnm = fcnp->cn_nameptr; 1541 int flen = fcnp->cn_namelen; 1542 const char *tnm = tcnp->cn_nameptr; 1543 int tlen = tcnp->cn_namelen; 1544 1545 MARK_ENTRY(CODA_RENAME_STATS); 1546 1547 /* Hmmm. The vnodes are already looked up. Perhaps they are locked? 1548 This could be Bad. XXX */ 1549#ifdef OLD_DIAGNOSTIC 1550 if ((fcnp->cn_cred != tcnp->cn_cred) 1551 || (fcnp->cn_proc != tcnp->cn_proc)) 1552 { 1553 panic("coda_rename: component names don't agree"); 1554 } 1555#endif 1556 1557 /* Check for rename involving control object. */ 1558 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { 1559 MARK_INT_FAIL(CODA_RENAME_STATS); 1560 return(EACCES); 1561 } 1562 1563 /* Problem with moving directories -- need to flush entry for .. */ 1564 if (odvp != ndvp) { 1565 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); 1566 if (ovcp) { 1567 struct vnode *ovp = CTOV(ovcp); 1568 if ((ovp) && 1569 (ovp->v_type == VDIR)) /* If it's a directory */ 1570 coda_nc_zapfile(VTOC(ovp),"..", 2); 1571 } 1572 } 1573 1574 /* Remove the entries for both source and target files */ 1575 coda_nc_zapfile(VTOC(odvp), fnm, flen); 1576 coda_nc_zapfile(VTOC(ndvp), tnm, tlen); 1577 1578 /* Invalidate the parent's attr cache, the modification time has changed */ 1579 VTOC(odvp)->c_flags &= ~C_VATTR; 1580 VTOC(ndvp)->c_flags &= ~C_VATTR; 1581 1582 if (flen+1 > CODA_MAXNAMLEN) { 1583 MARK_INT_FAIL(CODA_RENAME_STATS); 1584 error = EINVAL; 1585 goto exit; 1586 } 1587 1588 if (tlen+1 > CODA_MAXNAMLEN) { 1589 MARK_INT_FAIL(CODA_RENAME_STATS); 1590 error = EINVAL; 1591 goto exit; 1592 } 1593 1594 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, p); 1595 1596 exit: 1597 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) 1598 /* XXX - do we need to call cache pureg on the moved vnode? */ 1599 cache_purge(ap->a_fvp); 1600 1601 /* It seems to be incumbent on us to drop locks on all four vnodes */ 1602 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ 1603 1604 vrele(ap->a_fvp); 1605 vrele(odvp); 1606 1607 if (ap->a_tvp) { 1608 if (ap->a_tvp == ndvp) { 1609 vrele(ap->a_tvp); 1610 } else { 1611 vput(ap->a_tvp); 1612 } 1613 } 1614 1615 vput(ndvp); 1616 return(error); 1617} 1618 1619int 1620coda_mkdir(v) 1621 void *v; 1622{ 1623/* true args */ 1624 struct vop_mkdir_args *ap = v; 1625 struct vnode *dvp = ap->a_dvp; 1626 struct cnode *dcp = VTOC(dvp); 1627 struct componentname *cnp = ap->a_cnp; 1628 register struct vattr *va = ap->a_vap; 1629 struct vnode **vpp = ap->a_vpp; 1630 struct ucred *cred = cnp->cn_cred; 1631 struct proc *p = cnp->cn_proc; 1632/* locals */ 1633 int error; 1634 const char *nm = cnp->cn_nameptr; 1635 int len = cnp->cn_namelen; 1636 struct cnode *cp; 1637 ViceFid VFid; 1638 struct vattr ova; 1639 1640 MARK_ENTRY(CODA_MKDIR_STATS); 1641 1642 /* Check for mkdir of target object. */ 1643 if (IS_CTL_NAME(dvp, nm, len)) { 1644 *vpp = (struct vnode *)0; 1645 MARK_INT_FAIL(CODA_MKDIR_STATS); 1646 return(EACCES); 1647 } 1648 1649 if (len+1 > CODA_MAXNAMLEN) { 1650 *vpp = (struct vnode *)0; 1651 MARK_INT_FAIL(CODA_MKDIR_STATS); 1652 return(EACCES); 1653 } 1654 1655 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, p, &VFid, &ova); 1656 1657 if (!error) { 1658 if (coda_find(&VFid) != NULL) 1659 panic("cnode existed for newly created directory!"); 1660 1661 1662 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); 1663 *vpp = CTOV(cp); 1664 1665 /* enter the new vnode in the Name Cache */ 1666 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1667 1668 /* as a side effect, enter "." and ".." for the directory */ 1669 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); 1670 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); 1671 1672 if (coda_attr_cache) { 1673 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ 1674 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ 1675 } 1676 1677 /* Invalidate the parent's attr cache, the modification time has changed */ 1678 VTOC(dvp)->c_flags &= ~C_VATTR; 1679 1680 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n", 1681 VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 1682 } else { 1683 *vpp = (struct vnode *)0; 1684 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));) 1685 } 1686 1687 /* Have to free the previously saved name */ 1688 /* 1689 * ufs_mkdir doesn't check for SAVESTART before freeing the 1690 * pathname buffer, but ufs_create does. For the moment, I'll 1691 * follow their lead, but this seems like it is probably 1692 * incorrect. 1693 */ 1694 zfree(namei_zone, cnp->cn_pnbuf); 1695 return(error); 1696} 1697 1698int 1699coda_rmdir(v) 1700 void *v; 1701{ 1702/* true args */ 1703 struct vop_rmdir_args *ap = v; 1704 struct vnode *dvp = ap->a_dvp; 1705 struct cnode *dcp = VTOC(dvp); 1706 struct componentname *cnp = ap->a_cnp; 1707 struct ucred *cred = cnp->cn_cred; 1708 struct proc *p = cnp->cn_proc; 1709/* true args */ 1710 int error; 1711 const char *nm = cnp->cn_nameptr; 1712 int len = cnp->cn_namelen; 1713 struct cnode *cp; 1714 1715 MARK_ENTRY(CODA_RMDIR_STATS); 1716 1717 /* Check for rmdir of control object. */ 1718 if (IS_CTL_NAME(dvp, nm, len)) { 1719 MARK_INT_FAIL(CODA_RMDIR_STATS); 1720 return(ENOENT); 1721 } 1722 1723 /* We're being conservative here, it might be that this person 1724 * doesn't really have sufficient access to delete the file 1725 * but we feel zapping the entry won't really hurt anyone -- dcs 1726 */ 1727 /* 1728 * As a side effect of the rmdir, remove any entries for children of 1729 * the directory, especially "." and "..". 1730 */ 1731 cp = coda_nc_lookup(dcp, nm, len, cred); 1732 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); 1733 1734 /* Remove the file's entry from the CODA Name Cache */ 1735 coda_nc_zapfile(dcp, nm, len); 1736 1737 /* Invalidate the parent's attr cache, the modification time has changed */ 1738 dcp->c_flags &= ~C_VATTR; 1739 1740 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, p); 1741 1742 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) 1743 1744 if ((cnp->cn_flags & SAVESTART) == 0) { 1745 zfree(namei_zone, cnp->cn_pnbuf); 1746 } 1747 return(error); 1748} 1749 1750int 1751coda_symlink(v) 1752 void *v; 1753{ 1754/* true args */ 1755 struct vop_symlink_args *ap = v; 1756 struct vnode *tdvp = ap->a_dvp; 1757 struct cnode *tdcp = VTOC(tdvp); 1758 struct componentname *cnp = ap->a_cnp; 1759 struct vattr *tva = ap->a_vap; 1760 char *path = ap->a_target; 1761 struct ucred *cred = cnp->cn_cred; 1762 struct proc *p = cnp->cn_proc; 1763/* locals */ 1764 int error; 1765 /* 1766 * XXX I'm assuming the following things about coda_symlink's 1767 * arguments: 1768 * t(foo) is the new name/parent/etc being created. 1769 * lname is the contents of the new symlink. 1770 */ 1771 char *nm = cnp->cn_nameptr; 1772 int len = cnp->cn_namelen; 1773 int plen = strlen(path); 1774 1775 /* XXX What about the vpp argument? Do we need it? */ 1776 /* 1777 * Here's the strategy for the moment: perform the symlink, then 1778 * do a lookup to grab the resulting vnode. I know this requires 1779 * two communications with Venus for a new sybolic link, but 1780 * that's the way the ball bounces. I don't yet want to change 1781 * the way the Mach symlink works. When Mach support is 1782 * deprecated, we should change symlink so that the common case 1783 * returns the resultant vnode in a vpp argument. 1784 */ 1785 1786 MARK_ENTRY(CODA_SYMLINK_STATS); 1787 1788 /* Check for symlink of control object. */ 1789 if (IS_CTL_NAME(tdvp, nm, len)) { 1790 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1791 return(EACCES); 1792 } 1793 1794 if (plen+1 > CODA_MAXPATHLEN) { 1795 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1796 return(EINVAL); 1797 } 1798 1799 if (len+1 > CODA_MAXNAMLEN) { 1800 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1801 error = EINVAL; 1802 goto exit; 1803 } 1804 1805 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, p); 1806 1807 /* Invalidate the parent's attr cache, the modification time has changed */ 1808 tdcp->c_flags &= ~C_VATTR; 1809 1810 /* 1811 * Free the name buffer 1812 */ 1813 if ((cnp->cn_flags & SAVESTART) == 0) { 1814 zfree(namei_zone, cnp->cn_pnbuf); 1815 } 1816 1817 exit: 1818 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) 1819 return(error); 1820} 1821 1822/* 1823 * Read directory entries. 1824 */ 1825int 1826coda_readdir(v) 1827 void *v; 1828{ 1829/* true args */ 1830 struct vop_readdir_args *ap = v; 1831 struct vnode *vp = ap->a_vp; 1832 struct cnode *cp = VTOC(vp); 1833 register struct uio *uiop = ap->a_uio; 1834 struct ucred *cred = ap->a_cred; 1835 int *eofflag = ap->a_eofflag; 1836 u_long **cookies = ap->a_cookies; 1837 int *ncookies = ap->a_ncookies; 1838 struct proc *p = ap->a_uio->uio_procp; 1839/* upcall decl */ 1840/* locals */ 1841 int error = 0; 1842 1843 MARK_ENTRY(CODA_READDIR_STATS); 1844 1845 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)); ) 1846 1847 /* Check for readdir of control object. */ 1848 if (IS_CTL_VP(vp)) { 1849 MARK_INT_FAIL(CODA_READDIR_STATS); 1850 return(ENOENT); 1851 } 1852 1853 { 1854 /* If directory is not already open do an "internal open" on it. */ 1855 int opened_internally = 0; 1856 if (cp->c_ovp == NULL) { 1857 opened_internally = 1; 1858 MARK_INT_GEN(CODA_OPEN_STATS); 1859 error = VOP_OPEN(vp, FREAD, cred, p); 1860printf("coda_readdir: Internally Opening %p\n", vp); 1861 if (error) { 1862 printf("coda_readdir: VOP_OPEN on container failed %d\n", error); 1863 return (error); 1864 } 1865 if (vp->v_type == VREG) { 1866 error = vfs_object_create(vp, p, cred, 1); 1867 if (error != 0) { 1868 printf("coda_readdir: vfs_object_create() returns %d\n", error); 1869 vput(vp); 1870 } 1871 } 1872 if (error) return(error); 1873 } 1874 1875 /* Have UFS handle the call. */ 1876 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)); ) 1877 error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, ncookies, 1878 cookies); 1879 1880 if (error) 1881 MARK_INT_FAIL(CODA_READDIR_STATS); 1882 else 1883 MARK_INT_SAT(CODA_READDIR_STATS); 1884 1885 /* Do an "internal close" if necessary. */ 1886 if (opened_internally) { 1887 MARK_INT_GEN(CODA_CLOSE_STATS); 1888 (void)VOP_CLOSE(vp, FREAD, cred, p); 1889 } 1890 } 1891 1892 return(error); 1893} 1894 1895/* 1896 * Convert from file system blocks to device blocks 1897 */ 1898int 1899coda_bmap(v) 1900 void *v; 1901{ 1902 /* XXX on the global proc */ 1903/* true args */ 1904 struct vop_bmap_args *ap = v; 1905 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */ 1906 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */ 1907 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */ 1908 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */ 1909 struct proc *p __attribute__((unused)) = curproc; 1910/* upcall decl */ 1911/* locals */ 1912 1913 int ret = 0; 1914 struct cnode *cp; 1915 1916 cp = VTOC(vp); 1917 if (cp->c_ovp) { 1918 return EINVAL; 1919 ret = VOP_BMAP(cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb); 1920#if 0 1921 printf("VOP_BMAP(cp->c_ovp %p, bn %p, vpp %p, bnp %p, ap->a_runp %p, ap->a_runb %p) = %d\n", 1922 cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb, ret); 1923#endif 1924 return ret; 1925 } else { 1926 printf("coda_bmap: no container\n"); 1927 return(EOPNOTSUPP); 1928 } 1929} 1930 1931/* 1932 * I don't think the following two things are used anywhere, so I've 1933 * commented them out 1934 * 1935 * struct buf *async_bufhead; 1936 * int async_daemon_count; 1937 */ 1938int 1939coda_strategy(v) 1940 void *v; 1941{ 1942/* true args */ 1943 struct vop_strategy_args *ap = v; 1944 register struct buf *bp __attribute__((unused)) = ap->a_bp; 1945 struct proc *p __attribute__((unused)) = curproc; 1946/* upcall decl */ 1947/* locals */ 1948 1949 printf("coda_strategy: called ???\n"); 1950 return(EOPNOTSUPP); 1951} 1952 1953int 1954coda_reclaim(v) 1955 void *v; 1956{ 1957/* true args */ 1958 struct vop_reclaim_args *ap = v; 1959 struct vnode *vp = ap->a_vp; 1960 struct cnode *cp = VTOC(vp); 1961/* upcall decl */ 1962/* locals */ 1963 1964/* 1965 * Forced unmount/flush will let vnodes with non zero use be destroyed! 1966 */ 1967 ENTRY; 1968 1969 if (IS_UNMOUNTING(cp)) { 1970#ifdef DEBUG 1971 if (VTOC(vp)->c_ovp) { 1972 if (IS_UNMOUNTING(cp)) 1973 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp); 1974 } 1975#endif 1976 } else { 1977#ifdef OLD_DIAGNOSTIC 1978 if (vp->v_usecount != 0) 1979 print("coda_reclaim: pushing active %p\n", vp); 1980 if (VTOC(vp)->c_ovp) { 1981 panic("coda_reclaim: c_ovp not void"); 1982 } 1983#endif 1984 } 1985 cache_purge(vp); 1986 coda_free(VTOC(vp)); 1987 VTOC(vp) = NULL; 1988 return (0); 1989} 1990 1991int 1992coda_lock(v) 1993 void *v; 1994{ 1995/* true args */ 1996 struct vop_lock_args *ap = v; 1997 struct vnode *vp = ap->a_vp; 1998 struct cnode *cp = VTOC(vp); 1999 struct proc *p = ap->a_p; 2000/* upcall decl */ 2001/* locals */ 2002 2003 ENTRY; 2004 2005 if (coda_lockdebug) { 2006 myprintf(("Attempting lock on %lx.%lx.%lx\n", 2007 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 2008 } 2009 2010 return (lockmgr(&cp->c_lock, ap->a_flags, &vp->v_interlock, p)); 2011} 2012 2013int 2014coda_unlock(v) 2015 void *v; 2016{ 2017/* true args */ 2018 struct vop_unlock_args *ap = v; 2019 struct vnode *vp = ap->a_vp; 2020 struct cnode *cp = VTOC(vp); 2021 struct proc *p = ap->a_p; 2022/* upcall decl */ 2023/* locals */ 2024 2025 ENTRY; 2026 if (coda_lockdebug) { 2027 myprintf(("Attempting unlock on %lx.%lx.%lx\n", 2028 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 2029 } 2030 2031 return (lockmgr(&cp->c_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock, p)); 2032} 2033 2034int 2035coda_islocked(v) 2036 void *v; 2037{ 2038/* true args */ 2039 struct vop_islocked_args *ap = v; 2040 struct cnode *cp = VTOC(ap->a_vp); 2041 ENTRY; 2042 2043 return (lockstatus(&cp->c_lock)); 2044} 2045 2046/* How one looks up a vnode given a device/inode pair: */ 2047int 2048coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp) 2049{ 2050 /* This is like VFS_VGET() or igetinode()! */ 2051 int error; 2052 struct mount *mp; 2053 2054 if (!(mp = devtomp(dev))) { 2055 myprintf(("coda_grab_vnode: devtomp(%d) returns NULL\n", dev)); 2056 return(ENXIO); 2057 } 2058 2059 /* XXX - ensure that nonzero-return means failure */ 2060 error = VFS_VGET(mp,ino,vpp); 2061 if (error) { 2062 myprintf(("coda_grab_vnode: iget/vget(%d, %d) returns %p, err %d\n", 2063 dev, ino, *vpp, error)); 2064 return(ENOENT); 2065 } 2066 return(0); 2067} 2068 2069void 2070print_vattr( attr ) 2071 struct vattr *attr; 2072{ 2073 char *typestr; 2074 2075 switch (attr->va_type) { 2076 case VNON: 2077 typestr = "VNON"; 2078 break; 2079 case VREG: 2080 typestr = "VREG"; 2081 break; 2082 case VDIR: 2083 typestr = "VDIR"; 2084 break; 2085 case VBLK: 2086 typestr = "VBLK"; 2087 break; 2088 case VCHR: 2089 typestr = "VCHR"; 2090 break; 2091 case VLNK: 2092 typestr = "VLNK"; 2093 break; 2094 case VSOCK: 2095 typestr = "VSCK"; 2096 break; 2097 case VFIFO: 2098 typestr = "VFFO"; 2099 break; 2100 case VBAD: 2101 typestr = "VBAD"; 2102 break; 2103 default: 2104 typestr = "????"; 2105 break; 2106 } 2107 2108 2109 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", 2110 typestr, (int)attr->va_mode, (int)attr->va_uid, 2111 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); 2112 2113 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", 2114 (int)attr->va_fileid, (int)attr->va_nlink, 2115 (int)attr->va_size, 2116 (int)attr->va_blocksize,(int)attr->va_bytes)); 2117 myprintf((" gen %ld flags %ld vaflags %d\n", 2118 attr->va_gen, attr->va_flags, attr->va_vaflags)); 2119 myprintf((" atime sec %d nsec %d\n", 2120 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); 2121 myprintf((" mtime sec %d nsec %d\n", 2122 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); 2123 myprintf((" ctime sec %d nsec %d\n", 2124 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); 2125} 2126 2127/* How to print a ucred */ 2128void 2129print_cred(cred) 2130 struct ucred *cred; 2131{ 2132 2133 int i; 2134 2135 myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid)); 2136 2137 for (i=0; i < cred->cr_ngroups; i++) 2138 myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i])); 2139 myprintf(("\n")); 2140 2141} 2142 2143/* 2144 * Return a vnode for the given fid. 2145 * If no cnode exists for this fid create one and put it 2146 * in a table hashed by fid.Volume and fid.Vnode. If the cnode for 2147 * this fid is already in the table return it (ref count is 2148 * incremented by coda_find. The cnode will be flushed from the 2149 * table when coda_inactive calls coda_unsave. 2150 */ 2151struct cnode * 2152make_coda_node(fid, vfsp, type) 2153 ViceFid *fid; struct mount *vfsp; short type; 2154{ 2155 struct cnode *cp; 2156 int err; 2157 2158 if ((cp = coda_find(fid)) == NULL) { 2159 struct vnode *vp; 2160 2161 cp = coda_alloc(); 2162 lockinit(&cp->c_lock, PINOD, "cnode", 0, 0); 2163 cp->c_fid = *fid; 2164 2165 err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp); 2166 if (err) { 2167 panic("coda: getnewvnode returned error %d\n", err); 2168 } 2169 vp->v_data = cp; 2170 vp->v_type = type; 2171 cp->c_vnode = vp; 2172 coda_save(cp); 2173 2174 } else { 2175 vref(CTOV(cp)); 2176 } 2177 2178 return cp; 2179} 2180