coda_vnops.c revision 43295
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 1.13 1999/01/20 14:49:05 eivind 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 1.13 1999/01/20 14:49:05 eivind 52 * Add 'options DEBUG_LOCKS', which stores extra information in struct 53 * lock, and add some macros and function parameters to make sure that 54 * the information get to the point where it can be put in the lock 55 * structure. 56 * 57 * While I'm here, add DEBUG_VFS_LOCKS to LINT. 58 * 59 * Revision 1.12 1999/01/07 16:14:12 bde 60 * Don't pass unused unused timestamp args to UFS_UPDATE() or waste 61 * time initializing them. This almost finishes centralizing (in-core) 62 * timestamp updates in ufs_itimes(). 63 * 64 * Revision 1.11 1999/01/05 18:49:51 eivind 65 * Remove the 'waslocked' parameter to vfs_object_create(). 66 * 67 * Revision 1.10 1998/12/04 18:44:21 rvb 68 * Don't print diagnostic anymore 69 * 70 * Revision 1.9 1998/11/16 19:48:26 rvb 71 * A few bug fixes for Robert Watson 72 * 73 * Revision 1.8 1998/10/28 20:31:13 rvb 74 * Change the way unmounting happens to guarantee that the 75 * client programs are allowed to finish up (coda_call is 76 * forced to complete) and release their locks. Thus there 77 * is a reasonable chance that the vflush implicit in the 78 * unmount will not get hung on held locks. 79 * 80 * Revision 1.7 1998/10/25 17:44:41 phk 81 * Nitpicking and dusting performed on a train. Removes trivial warnings 82 * about unused variables, labels and other lint. 83 * 84 * Revision 1.6 1998/09/28 20:52:58 rvb 85 * Cleanup and fix THE bug 86 * 87 * Revision 1.5 1998/09/25 17:38:32 rvb 88 * Put "stray" printouts under DIAGNOSTIC. Make everything build 89 * with DEBUG on. Add support for lkm. (The macro's don't work 90 * for me; for a good chuckle look at the end of coda_fbsd.c.) 91 * 92 * Revision 1.4 1998/09/13 13:57:59 rvb 93 * Finish conversion of cfs -> coda 94 * 95 * Revision 1.3 1998/09/11 18:50:17 rvb 96 * All the references to cfs, in symbols, structs, and strings 97 * have been changed to coda. (Same for CFS.) 98 * 99 * Revision 1.2 1998/09/02 19:09:53 rvb 100 * Pass2 complete 101 * 102 * Revision 1.1.1.1 1998/08/29 21:14:52 rvb 103 * Very Preliminary Coda 104 * 105 * Revision 1.12 1998/08/28 18:28:00 rvb 106 * NetBSD -current is stricter! 107 * 108 * Revision 1.11 1998/08/28 18:12:23 rvb 109 * Now it also works on FreeBSD -current. This code will be 110 * committed to the FreeBSD -current and NetBSD -current 111 * trees. It will then be tailored to the particular platform 112 * by flushing conditional code. 113 * 114 * Revision 1.10 1998/08/18 17:05:21 rvb 115 * Don't use __RCSID now 116 * 117 * Revision 1.9 1998/08/18 16:31:46 rvb 118 * Sync the code for NetBSD -current; test on 1.3 later 119 * 120 * Revision 1.8 98/02/24 22:22:50 rvb 121 * Fixes up mainly to flush iopen and friends 122 * 123 * Revision 1.7 98/01/31 20:53:15 rvb 124 * First version that works on FreeBSD 2.2.5 125 * 126 * Revision 1.6 98/01/23 11:53:47 rvb 127 * Bring RVB_CODA1_1 to HEAD 128 * 129 * Revision 1.5.2.8 98/01/23 11:21:11 rvb 130 * Sync with 2.2.5 131 * 132 * Revision 1.5.2.7 97/12/19 14:26:08 rvb 133 * session id 134 * 135 * Revision 1.5.2.6 97/12/16 22:01:34 rvb 136 * Oops add cfs_subr.h cfs_venus.h; sync with peter 137 * 138 * Revision 1.5.2.5 97/12/16 12:40:14 rvb 139 * Sync with 1.3 140 * 141 * Revision 1.5.2.4 97/12/10 14:08:31 rvb 142 * Fix O_ flags; check result in coda_call 143 * 144 * Revision 1.5.2.3 97/12/10 11:40:27 rvb 145 * No more ody 146 * 147 * Revision 1.5.2.2 97/12/09 16:07:15 rvb 148 * Sync with vfs/include/coda.h 149 * 150 * Revision 1.5.2.1 97/12/06 17:41:25 rvb 151 * Sync with peters coda.h 152 * 153 * Revision 1.5 97/12/05 10:39:23 rvb 154 * Read CHANGES 155 * 156 * Revision 1.4.14.10 97/11/25 08:08:48 rvb 157 * cfs_venus ... done; until cred/vattr change 158 * 159 * Revision 1.4.14.9 97/11/24 15:44:48 rvb 160 * Final cfs_venus.c w/o macros, but one locking bug 161 * 162 * Revision 1.4.14.8 97/11/21 11:28:04 rvb 163 * cfs_venus.c is done: first pass 164 * 165 * Revision 1.4.14.7 97/11/20 11:46:51 rvb 166 * Capture current cfs_venus 167 * 168 * Revision 1.4.14.6 97/11/18 10:27:19 rvb 169 * cfs_nbsd.c is DEAD!!!; integrated into cfs_vf/vnops.c 170 * cfs_nb_foo and cfs_foo are joined 171 * 172 * Revision 1.4.14.5 97/11/13 22:03:03 rvb 173 * pass2 cfs_NetBSD.h mt 174 * 175 * Revision 1.4.14.4 97/11/12 12:09:42 rvb 176 * reorg pass1 177 * 178 * Revision 1.4.14.3 97/11/06 21:03:28 rvb 179 * don't include headers in headers 180 * 181 * Revision 1.4.14.2 97/10/29 16:06:30 rvb 182 * Kill DYING 183 * 184 * Revision 1.4.14.1 1997/10/28 23:10:18 rvb 185 * >64Meg; venus can be killed! 186 * 187 * Revision 1.4 1997/02/20 13:54:50 lily 188 * check for NULL return from coda_nc_lookup before CTOV 189 * 190 * Revision 1.3 1996/12/12 22:11:02 bnoble 191 * Fixed the "downcall invokes venus operation" deadlock in all known cases. 192 * There may be more 193 * 194 * Revision 1.2 1996/01/02 16:57:07 bnoble 195 * Added support for Coda MiniCache and raw inode calls (final commit) 196 * 197 * Revision 1.1.2.1 1995/12/20 01:57:34 bnoble 198 * Added CODA-specific files 199 * 200 * Revision 3.1.1.1 1995/03/04 19:08:06 bnoble 201 * Branch for NetBSD port revisions 202 * 203 * Revision 3.1 1995/03/04 19:08:04 bnoble 204 * Bump to major revision 3 to prepare for NetBSD port 205 * 206 * Revision 2.6 1995/02/17 16:25:26 dcs 207 * These versions represent several changes: 208 * 1. Allow venus to restart even if outstanding references exist. 209 * 2. Have only one ctlvp per client, as opposed to one per mounted cfs device.d 210 * 3. Allow ody_expand to return many members, not just one. 211 * 212 * Revision 2.5 94/11/09 20:29:27 dcs 213 * Small bug in remove dealing with hard links and link counts was fixed. 214 * 215 * Revision 2.4 94/10/14 09:58:42 dcs 216 * Made changes 'cause sun4s have braindead compilers 217 * 218 * Revision 2.3 94/10/12 16:46:37 dcs 219 * Cleaned kernel/venus interface by removing XDR junk, plus 220 * so cleanup to allow this code to be more easily ported. 221 * 222 * Revision 2.2 94/09/20 14:12:41 dcs 223 * Fixed bug in rename when moving a directory. 224 * 225 * Revision 2.1 94/07/21 16:25:22 satya 226 * Conversion to C++ 3.0; start of Coda Release 2.0 227 * 228 * Revision 1.4 93/12/17 01:38:01 luqi 229 * Changes made for kernel to pass process info to Venus: 230 * 231 * (1) in file cfs.h 232 * add process id and process group id in most of the cfs argument types. 233 * 234 * (2) in file cfs_vnodeops.c 235 * add process info passing in most of the cfs vnode operations. 236 * 237 * (3) in file cfs_xdr.c 238 * expand xdr routines according changes in (1). 239 * add variable pass_process_info to allow venus for kernel version checking. 240 * 241 * Revision 1.3 93/05/28 16:24:33 bnoble 242 * *** empty log message *** 243 * 244 * Revision 1.2 92/10/27 17:58:25 lily 245 * merge kernel/latest and alpha/src/cfs 246 * 247 * Revision 2.4 92/09/30 14:16:37 mja 248 * Redid buffer allocation so that it does kmem_{alloc,free} for all 249 * architectures. Zone allocation, previously used on the 386, caused 250 * panics if it was invoked repeatedly. Stack allocation, previously 251 * used on all other architectures, tickled some Mach bug that appeared 252 * with large stack frames. 253 * [91/02/09 jjk] 254 * 255 * Added contributors blurb. 256 * [90/12/13 jjk] 257 * 258 * Revision 2.3 90/07/26 15:50:09 mrt 259 * Fixed fix to rename to remove .. from moved directories. 260 * [90/06/28 dcs] 261 * 262 * Revision 1.7 90/06/28 16:24:25 dcs 263 * Fixed bug with moving directories, we weren't flushing .. for the moved directory. 264 * 265 * Revision 1.6 90/05/31 17:01:47 dcs 266 * Prepare for merge with facilities kernel. 267 * 268 * 269 */ 270 271#include <sys/param.h> 272#include <sys/systm.h> 273#include <sys/kernel.h> 274#include <sys/proc.h> 275#include <sys/malloc.h> 276#include <sys/mount.h> 277#include <sys/errno.h> 278#include <sys/acct.h> 279#include <sys/file.h> 280#include <sys/fcntl.h> 281#include <sys/uio.h> 282#include <sys/namei.h> 283#include <sys/ioccom.h> 284#include <sys/select.h> 285 286#include <vm/vm.h> 287#include <vm/vm_object.h> 288#include <vm/vm_extern.h> 289#include <vm/vm_zone.h> 290 291#include <coda/coda.h> 292#include <coda/cnode.h> 293#include <coda/coda_vnops.h> 294#include <coda/coda_venus.h> 295#include <coda/coda_opstats.h> 296#include <coda/coda_subr.h> 297#include <coda/coda_namecache.h> 298#include <coda/coda_pioctl.h> 299 300/* 301 * These flags select various performance enhancements. 302 */ 303int coda_attr_cache = 1; /* Set to cache attributes in the kernel */ 304int coda_symlink_cache = 1; /* Set to cache symbolic link information */ 305int coda_access_cache = 1; /* Set to handle some access checks directly */ 306 307/* structure to keep track of vfs calls */ 308 309struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE]; 310 311#define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++) 312#define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++) 313#define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++) 314#define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++) 315 316/* What we are delaying for in printf */ 317int coda_printf_delay = 0; /* in microseconds */ 318int coda_vnop_print_entry = 0; 319static int coda_lockdebug = 0; 320 321/* Definition of the vfs operation vector */ 322 323/* 324 * Some NetBSD details: 325 * 326 * coda_start is called at the end of the mount syscall. 327 * coda_init is called at boot time. 328 */ 329 330#define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__FUNCTION__)) 331 332/* Definition of the vnode operation vector */ 333 334struct vnodeopv_entry_desc coda_vnodeop_entries[] = { 335 { &vop_default_desc, coda_vop_error }, 336 { &vop_lookup_desc, coda_lookup }, /* lookup */ 337 { &vop_create_desc, coda_create }, /* create */ 338 { &vop_mknod_desc, coda_vop_error }, /* mknod */ 339 { &vop_open_desc, coda_open }, /* open */ 340 { &vop_close_desc, coda_close }, /* close */ 341 { &vop_access_desc, coda_access }, /* access */ 342 { &vop_getattr_desc, coda_getattr }, /* getattr */ 343 { &vop_setattr_desc, coda_setattr }, /* setattr */ 344 { &vop_read_desc, coda_read }, /* read */ 345 { &vop_write_desc, coda_write }, /* write */ 346 { &vop_ioctl_desc, coda_ioctl }, /* ioctl */ 347 { &vop_mmap_desc, coda_vop_error }, /* mmap */ 348 { &vop_fsync_desc, coda_fsync }, /* fsync */ 349 { &vop_remove_desc, coda_remove }, /* remove */ 350 { &vop_link_desc, coda_link }, /* link */ 351 { &vop_rename_desc, coda_rename }, /* rename */ 352 { &vop_mkdir_desc, coda_mkdir }, /* mkdir */ 353 { &vop_rmdir_desc, coda_rmdir }, /* rmdir */ 354 { &vop_symlink_desc, coda_symlink }, /* symlink */ 355 { &vop_readdir_desc, coda_readdir }, /* readdir */ 356 { &vop_readlink_desc, coda_readlink }, /* readlink */ 357 { &vop_abortop_desc, coda_abortop }, /* abortop */ 358 { &vop_inactive_desc, coda_inactive }, /* inactive */ 359 { &vop_reclaim_desc, coda_reclaim }, /* reclaim */ 360 { &vop_lock_desc, coda_lock }, /* lock */ 361 { &vop_unlock_desc, coda_unlock }, /* unlock */ 362 { &vop_bmap_desc, coda_bmap }, /* bmap */ 363 { &vop_strategy_desc, coda_strategy }, /* strategy */ 364 { &vop_print_desc, coda_vop_error }, /* print */ 365 { &vop_islocked_desc, coda_islocked }, /* islocked */ 366 { &vop_pathconf_desc, coda_vop_error }, /* pathconf */ 367 { &vop_advlock_desc, coda_vop_nop }, /* advlock */ 368 { &vop_bwrite_desc, coda_vop_error }, /* bwrite */ 369 { &vop_lease_desc, coda_vop_nop }, /* lease */ 370 { &vop_poll_desc, (vop_t *) vop_stdpoll }, 371 { &vop_getpages_desc, coda_fbsd_getpages }, /* pager intf.*/ 372 { &vop_putpages_desc, coda_fbsd_putpages }, /* pager intf.*/ 373 374#if 0 375 376 we need to define these someday 377#define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd) 378#define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd) 379#define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc) 380#define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee) 381#define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb) 382 383 missing 384 { &vop_reallocblks_desc, (vop_t *) ufs_missingop }, 385 { &vop_cachedlookup_desc, (vop_t *) ufs_lookup }, 386 { &vop_whiteout_desc, (vop_t *) ufs_whiteout }, 387#endif 388 { (struct vnodeop_desc*)NULL, (int(*)(void *))NULL } 389}; 390 391static struct vnodeopv_desc coda_vnodeop_opv_desc = 392 { &coda_vnodeop_p, coda_vnodeop_entries }; 393 394VNODEOP_SET(coda_vnodeop_opv_desc); 395 396/* A generic panic: we were called with something we didn't define yet */ 397int 398coda_vop_error(void *anon) { 399 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 400 401 myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n", 402 (*desc)->vdesc_name)); 403 /* 404 panic("coda_vop_error"); 405 */ 406 return EIO; 407} 408 409/* A generic do-nothing. For lease_check, advlock */ 410int 411coda_vop_nop(void *anon) { 412 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon; 413 414 if (codadebug) { 415 myprintf(("Vnode operation %s called, but unsupported\n", 416 (*desc)->vdesc_name)); 417 } 418 return (0); 419} 420 421int 422coda_vnodeopstats_init(void) 423{ 424 register int i; 425 426 for(i=0;i<CODA_VNODEOPS_SIZE;i++) { 427 coda_vnodeopstats[i].opcode = i; 428 coda_vnodeopstats[i].entries = 0; 429 coda_vnodeopstats[i].sat_intrn = 0; 430 coda_vnodeopstats[i].unsat_intrn = 0; 431 coda_vnodeopstats[i].gen_intrn = 0; 432 } 433 return 0; 434} 435 436/* 437 * coda_open calls Venus to return the device, inode pair of the cache 438 * file holding the data. Using iget, coda_open finds the vnode of the 439 * cache file, and then opens it. 440 */ 441int 442coda_open(v) 443 void *v; 444{ 445 /* 446 * NetBSD can pass the O_EXCL flag in mode, even though the check 447 * has already happened. Venus defensively assumes that if open 448 * is passed the EXCL, it must be a bug. We strip the flag here. 449 */ 450/* true args */ 451 struct vop_open_args *ap = v; 452 register struct vnode **vpp = &(ap->a_vp); 453 struct cnode *cp = VTOC(*vpp); 454 int flag = ap->a_mode & (~O_EXCL); 455 struct ucred *cred = ap->a_cred; 456 struct proc *p = ap->a_p; 457/* locals */ 458 int error; 459 struct vnode *vp; 460 dev_t dev; 461 ino_t inode; 462 463 MARK_ENTRY(CODA_OPEN_STATS); 464 465 /* Check for open of control file. */ 466 if (IS_CTL_VP(*vpp)) { 467 /* XXX */ 468 /* if (WRITEABLE(flag)) */ 469 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) { 470 MARK_INT_FAIL(CODA_OPEN_STATS); 471 return(EACCES); 472 } 473 MARK_INT_SAT(CODA_OPEN_STATS); 474 return(0); 475 } 476 477 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, p, &dev, &inode); 478 if (error) 479 return (error); 480 if (!error) { 481 CODADEBUG( CODA_OPEN,myprintf(("open: dev %d inode %d result %d\n", 482 dev, inode, error)); ) 483 } 484 485 /* Translate the <device, inode> pair for the cache file into 486 an inode pointer. */ 487 error = coda_grab_vnode(dev, inode, &vp); 488 if (error) 489 return (error); 490 491 /* We get the vnode back locked. Needs unlocked */ 492 VOP_UNLOCK(vp, 0, p); 493 /* Keep a reference until the close comes in. */ 494 vref(*vpp); 495 496 /* Save the vnode pointer for the cache file. */ 497 if (cp->c_ovp == NULL) { 498 cp->c_ovp = vp; 499 } else { 500 if (cp->c_ovp != vp) 501 panic("coda_open: cp->c_ovp != ITOV(ip)"); 502 } 503 cp->c_ocount++; 504 505 /* Flush the attribute cached if writing the file. */ 506 if (flag & FWRITE) { 507 cp->c_owrite++; 508 cp->c_flags &= ~C_VATTR; 509 } 510 511 /* Save the <device, inode> pair for the cache file to speed 512 up subsequent page_read's. */ 513 cp->c_device = dev; 514 cp->c_inode = inode; 515 516 /* Open the cache file. */ 517 error = VOP_OPEN(vp, flag, cred, p); 518 if (error) { 519 printf("coda_open: VOP_OPEN on container failed %d\n", error); 520 return (error); 521 } 522/* grab (above) does this when it calls newvnode unless it's in the cache*/ 523 if (vp->v_type == VREG) { 524 error = vfs_object_create(vp, p, cred); 525 if (error != 0) { 526 printf("coda_open: vfs_object_create() returns %d\n", error); 527 vput(vp); 528 } 529 } 530 531 return(error); 532} 533 534/* 535 * Close the cache file used for I/O and notify Venus. 536 */ 537int 538coda_close(v) 539 void *v; 540{ 541/* true args */ 542 struct vop_close_args *ap = v; 543 struct vnode *vp = ap->a_vp; 544 struct cnode *cp = VTOC(vp); 545 int flag = ap->a_fflag; 546 struct ucred *cred = ap->a_cred; 547 struct proc *p = ap->a_p; 548/* locals */ 549 int error; 550 551 MARK_ENTRY(CODA_CLOSE_STATS); 552 553 /* Check for close of control file. */ 554 if (IS_CTL_VP(vp)) { 555 MARK_INT_SAT(CODA_CLOSE_STATS); 556 return(0); 557 } 558 559 if (IS_UNMOUNTING(cp)) { 560 if (cp->c_ovp) { 561#ifdef CODA_VERBOSE 562 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n", 563 vp->v_usecount, cp->c_ovp, vp, cp); 564#endif 565#ifdef hmm 566 vgone(cp->c_ovp); 567#else 568 VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 569 vrele(cp->c_ovp); 570#endif 571 } else { 572#ifdef CODA_VERBOSE 573 printf("coda_close: NO container vp %p/cp %p\n", vp, cp); 574#endif 575 } 576 return ENODEV; 577 } else { 578 VOP_CLOSE(cp->c_ovp, flag, cred, p); /* Do errors matter here? */ 579 vrele(cp->c_ovp); 580 } 581 582 if (--cp->c_ocount == 0) 583 cp->c_ovp = NULL; 584 585 if (flag & FWRITE) /* file was opened for write */ 586 --cp->c_owrite; 587 588 error = venus_close(vtomi(vp), &cp->c_fid, flag, cred, p); 589 vrele(CTOV(cp)); 590 591 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); ) 592 return(error); 593} 594 595int 596coda_read(v) 597 void *v; 598{ 599 struct vop_read_args *ap = v; 600 601 ENTRY; 602 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ, 603 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 604} 605 606int 607coda_write(v) 608 void *v; 609{ 610 struct vop_write_args *ap = v; 611 612 ENTRY; 613 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE, 614 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_procp)); 615} 616 617int 618coda_rdwr(vp, uiop, rw, ioflag, cred, p) 619 struct vnode *vp; 620 struct uio *uiop; 621 enum uio_rw rw; 622 int ioflag; 623 struct ucred *cred; 624 struct proc *p; 625{ 626/* upcall decl */ 627 /* NOTE: container file operation!!! */ 628/* locals */ 629 struct cnode *cp = VTOC(vp); 630 struct vnode *cfvp = cp->c_ovp; 631 int igot_internally = 0; 632 int opened_internally = 0; 633 int error = 0; 634 635 MARK_ENTRY(CODA_RDWR_STATS); 636 637 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %d, %qd, %d)\n", rw, 638 uiop->uio_iov->iov_base, uiop->uio_resid, 639 uiop->uio_offset, uiop->uio_segflg)); ) 640 641 /* Check for rdwr of control object. */ 642 if (IS_CTL_VP(vp)) { 643 MARK_INT_FAIL(CODA_RDWR_STATS); 644 return(EINVAL); 645 } 646 647 /* 648 * If file is not already open this must be a page 649 * {read,write} request. Iget the cache file's inode 650 * pointer if we still have its <device, inode> pair. 651 * Otherwise, we must do an internal open to derive the 652 * pair. 653 */ 654 if (cfvp == NULL) { 655 /* 656 * If we're dumping core, do the internal open. Otherwise 657 * venus won't have the correct size of the core when 658 * it's completely written. 659 */ 660 if (cp->c_inode != 0 && !(p && (p->p_acflag & ACORE))) { 661 igot_internally = 1; 662 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp); 663 if (error) { 664 MARK_INT_FAIL(CODA_RDWR_STATS); 665 return(error); 666 } 667 /* 668 * We get the vnode back locked in both Mach and 669 * NetBSD. Needs unlocked 670 */ 671 VOP_UNLOCK(cfvp, 0, p); 672 } 673 else { 674 opened_internally = 1; 675 MARK_INT_GEN(CODA_OPEN_STATS); 676 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE), 677 cred, p); 678printf("coda_rdwr: Internally Opening %p\n", vp); 679 if (error) { 680 printf("coda_rdwr: VOP_OPEN on container failed %d\n", error); 681 return (error); 682 } 683 if (vp->v_type == VREG) { 684 error = vfs_object_create(vp, p, cred); 685 if (error != 0) { 686 printf("coda_rdwr: vfs_object_create() returns %d\n", error); 687 vput(vp); 688 } 689 } 690 if (error) { 691 MARK_INT_FAIL(CODA_RDWR_STATS); 692 return(error); 693 } 694 cfvp = cp->c_ovp; 695 } 696 } 697 698 /* Have UFS handle the call. */ 699 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n", 700 cp->c_fid.Volume, cp->c_fid.Vnode, 701 cp->c_fid.Unique, CTOV(cp)->v_usecount)); ) 702 703 704 if (rw == UIO_READ) { 705 error = VOP_READ(cfvp, uiop, ioflag, cred); 706 } else { 707 error = VOP_WRITE(cfvp, uiop, ioflag, cred); 708 /* ufs_write updates the vnode_pager_setsize for the vnode/object */ 709 710 { struct vattr attr; 711 712 if (VOP_GETATTR(cfvp, &attr, cred, p) == 0) { 713 vnode_pager_setsize(vp, attr.va_size); 714 } 715 } 716 } 717 718 if (error) 719 MARK_INT_FAIL(CODA_RDWR_STATS); 720 else 721 MARK_INT_SAT(CODA_RDWR_STATS); 722 723 /* Do an internal close if necessary. */ 724 if (opened_internally) { 725 MARK_INT_GEN(CODA_CLOSE_STATS); 726 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), cred, p); 727 } 728 729 /* Invalidate cached attributes if writing. */ 730 if (rw == UIO_WRITE) 731 cp->c_flags &= ~C_VATTR; 732 return(error); 733} 734 735int 736coda_ioctl(v) 737 void *v; 738{ 739/* true args */ 740 struct vop_ioctl_args *ap = v; 741 struct vnode *vp = ap->a_vp; 742 int com = ap->a_command; 743 caddr_t data = ap->a_data; 744 int flag = ap->a_fflag; 745 struct ucred *cred = ap->a_cred; 746 struct proc *p = ap->a_p; 747/* locals */ 748 int error; 749 struct vnode *tvp; 750 struct nameidata ndp; 751 struct PioctlData *iap = (struct PioctlData *)data; 752 753 MARK_ENTRY(CODA_IOCTL_STATS); 754 755 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));) 756 757 /* Don't check for operation on a dying object, for ctlvp it 758 shouldn't matter */ 759 760 /* Must be control object to succeed. */ 761 if (!IS_CTL_VP(vp)) { 762 MARK_INT_FAIL(CODA_IOCTL_STATS); 763 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));) 764 return (EOPNOTSUPP); 765 } 766 /* Look up the pathname. */ 767 768 /* Should we use the name cache here? It would get it from 769 lookupname sooner or later anyway, right? */ 770 771 NDINIT(&ndp, LOOKUP, (iap->follow ? FOLLOW : NOFOLLOW), UIO_USERSPACE, ((c_caddr_t)iap->path), p); 772 error = namei(&ndp); 773 tvp = ndp.ni_vp; 774 775 if (error) { 776 MARK_INT_FAIL(CODA_IOCTL_STATS); 777 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n", 778 error));) 779 return(error); 780 } 781 782 /* 783 * Make sure this is a coda style cnode, but it may be a 784 * different vfsp 785 */ 786 /* XXX: this totally violates the comment about vtagtype in vnode.h */ 787 if (tvp->v_tag != VT_CODA) { 788 vrele(tvp); 789 MARK_INT_FAIL(CODA_IOCTL_STATS); 790 CODADEBUG(CODA_IOCTL, 791 myprintf(("coda_ioctl error: %s not a coda object\n", 792 iap->path));) 793 return(EINVAL); 794 } 795 796 if (iap->vi.in_size > VC_MAXDATASIZE) { 797 vrele(tvp); 798 return(EINVAL); 799 } 800 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, p); 801 802 if (error) 803 MARK_INT_FAIL(CODA_IOCTL_STATS); 804 else 805 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); ) 806 807 vrele(tvp); 808 return(error); 809} 810 811/* 812 * To reduce the cost of a user-level venus;we cache attributes in 813 * the kernel. Each cnode has storage allocated for an attribute. If 814 * c_vattr is valid, return a reference to it. Otherwise, get the 815 * attributes from venus and store them in the cnode. There is some 816 * question if this method is a security leak. But I think that in 817 * order to make this call, the user must have done a lookup and 818 * opened the file, and therefore should already have access. 819 */ 820int 821coda_getattr(v) 822 void *v; 823{ 824/* true args */ 825 struct vop_getattr_args *ap = v; 826 struct vnode *vp = ap->a_vp; 827 struct cnode *cp = VTOC(vp); 828 struct vattr *vap = ap->a_vap; 829 struct ucred *cred = ap->a_cred; 830 struct proc *p = ap->a_p; 831/* locals */ 832 int error; 833 834 MARK_ENTRY(CODA_GETATTR_STATS); 835 836 if (IS_UNMOUNTING(cp)) 837 return ENODEV; 838 839 /* Check for getattr of control object. */ 840 if (IS_CTL_VP(vp)) { 841 MARK_INT_FAIL(CODA_GETATTR_STATS); 842 return(ENOENT); 843 } 844 845 /* Check to see if the attributes have already been cached */ 846 if (VALID_VATTR(cp)) { 847 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n", 848 cp->c_fid.Volume, 849 cp->c_fid.Vnode, 850 cp->c_fid.Unique));}); 851 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 852 print_vattr(&cp->c_vattr); ); 853 854 *vap = cp->c_vattr; 855 MARK_INT_SAT(CODA_GETATTR_STATS); 856 return(0); 857 } 858 859 error = venus_getattr(vtomi(vp), &cp->c_fid, cred, p, vap); 860 861 if (!error) { 862 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n", 863 cp->c_fid.Volume, 864 cp->c_fid.Vnode, 865 cp->c_fid.Unique, 866 error)); ) 867 868 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR)) 869 print_vattr(vap); ); 870 871 { int size = vap->va_size; 872 struct vnode *convp = cp->c_ovp; 873 if (convp != (struct vnode *)0) { 874 vnode_pager_setsize(convp, size); 875 } 876 } 877 /* If not open for write, store attributes in cnode */ 878 if ((cp->c_owrite == 0) && (coda_attr_cache)) { 879 cp->c_vattr = *vap; 880 cp->c_flags |= C_VATTR; 881 } 882 883 } 884 return(error); 885} 886 887int 888coda_setattr(v) 889 void *v; 890{ 891/* true args */ 892 struct vop_setattr_args *ap = v; 893 register struct vnode *vp = ap->a_vp; 894 struct cnode *cp = VTOC(vp); 895 register struct vattr *vap = ap->a_vap; 896 struct ucred *cred = ap->a_cred; 897 struct proc *p = ap->a_p; 898/* locals */ 899 int error; 900 901 MARK_ENTRY(CODA_SETATTR_STATS); 902 903 /* Check for setattr of control object. */ 904 if (IS_CTL_VP(vp)) { 905 MARK_INT_FAIL(CODA_SETATTR_STATS); 906 return(ENOENT); 907 } 908 909 if (codadebug & CODADBGMSK(CODA_SETATTR)) { 910 print_vattr(vap); 911 } 912 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, p); 913 914 if (!error) 915 cp->c_flags &= ~C_VATTR; 916 917 { int size = vap->va_size; 918 struct vnode *convp = cp->c_ovp; 919 if (size != VNOVAL && convp != (struct vnode *)0) { 920 vnode_pager_setsize(convp, size); 921 } 922 } 923 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); ) 924 return(error); 925} 926 927int 928coda_access(v) 929 void *v; 930{ 931/* true args */ 932 struct vop_access_args *ap = v; 933 struct vnode *vp = ap->a_vp; 934 struct cnode *cp = VTOC(vp); 935 int mode = ap->a_mode; 936 struct ucred *cred = ap->a_cred; 937 struct proc *p = ap->a_p; 938/* locals */ 939 int error; 940 941 MARK_ENTRY(CODA_ACCESS_STATS); 942 943 /* Check for access of control object. Only read access is 944 allowed on it. */ 945 if (IS_CTL_VP(vp)) { 946 /* bogus hack - all will be marked as successes */ 947 MARK_INT_SAT(CODA_ACCESS_STATS); 948 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC))) 949 ? 0 : EACCES); 950 } 951 952 /* 953 * if the file is a directory, and we are checking exec (eg lookup) 954 * access, and the file is in the namecache, then the user must have 955 * lookup access to it. 956 */ 957 if (coda_access_cache) { 958 if ((vp->v_type == VDIR) && (mode & VEXEC)) { 959 if (coda_nc_lookup(cp, ".", 1, cred)) { 960 MARK_INT_SAT(CODA_ACCESS_STATS); 961 return(0); /* it was in the cache */ 962 } 963 } 964 } 965 966 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, p); 967 968 return(error); 969} 970 971/* 972 * CODA abort op, called after namei() when a CREATE/DELETE isn't actually 973 * done. If a buffer has been saved in anticipation of a coda_create or 974 * a coda_remove, delete it. 975 */ 976/* ARGSUSED */ 977int 978coda_abortop(v) 979 void *v; 980{ 981/* true args */ 982 struct vop_abortop_args /* { 983 struct vnode *a_dvp; 984 struct componentname *a_cnp; 985 } */ *ap = v; 986/* upcall decl */ 987/* locals */ 988 989 if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF) 990 zfree(namei_zone, ap->a_cnp->cn_pnbuf); 991 return (0); 992} 993 994int 995coda_readlink(v) 996 void *v; 997{ 998/* true args */ 999 struct vop_readlink_args *ap = v; 1000 struct vnode *vp = ap->a_vp; 1001 struct cnode *cp = VTOC(vp); 1002 struct uio *uiop = ap->a_uio; 1003 struct ucred *cred = ap->a_cred; 1004 struct proc *p = ap->a_uio->uio_procp; 1005/* locals */ 1006 int error; 1007 char *str; 1008 int len; 1009 1010 MARK_ENTRY(CODA_READLINK_STATS); 1011 1012 /* Check for readlink of control object. */ 1013 if (IS_CTL_VP(vp)) { 1014 MARK_INT_FAIL(CODA_READLINK_STATS); 1015 return(ENOENT); 1016 } 1017 1018 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */ 1019 uiop->uio_rw = UIO_READ; 1020 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop); 1021 if (error) 1022 MARK_INT_FAIL(CODA_READLINK_STATS); 1023 else 1024 MARK_INT_SAT(CODA_READLINK_STATS); 1025 return(error); 1026 } 1027 1028 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, p, &str, &len); 1029 1030 if (!error) { 1031 uiop->uio_rw = UIO_READ; 1032 error = uiomove(str, len, uiop); 1033 1034 if (coda_symlink_cache) { 1035 cp->c_symlink = str; 1036 cp->c_symlen = len; 1037 cp->c_flags |= C_SYMLINK; 1038 } else 1039 CODA_FREE(str, len); 1040 } 1041 1042 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));) 1043 return(error); 1044} 1045 1046int 1047coda_fsync(v) 1048 void *v; 1049{ 1050/* true args */ 1051 struct vop_fsync_args *ap = v; 1052 struct vnode *vp = ap->a_vp; 1053 struct cnode *cp = VTOC(vp); 1054 struct ucred *cred = ap->a_cred; 1055 struct proc *p = ap->a_p; 1056/* locals */ 1057 struct vnode *convp = cp->c_ovp; 1058 int error; 1059 1060 MARK_ENTRY(CODA_FSYNC_STATS); 1061 1062 /* Check for fsync on an unmounting object */ 1063 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync 1064 * after an unmount has been initiated. This is a Bad Thing, 1065 * which we have to avoid. Not a legitimate failure for stats. 1066 */ 1067 if (IS_UNMOUNTING(cp)) { 1068 return(ENODEV); 1069 } 1070 1071 /* Check for fsync of control object. */ 1072 if (IS_CTL_VP(vp)) { 1073 MARK_INT_SAT(CODA_FSYNC_STATS); 1074 return(0); 1075 } 1076 1077 if (convp) 1078 VOP_FSYNC(convp, cred, MNT_WAIT, p); 1079 1080 /* 1081 * We see fsyncs with usecount == 1 then usecount == 0. 1082 * For now we ignore them. 1083 */ 1084 /* 1085 if (!vp->v_usecount) { 1086 printf("coda_fsync on vnode %p with %d usecount. c_flags = %x (%x)\n", 1087 vp, vp->v_usecount, cp->c_flags, cp->c_flags&C_PURGING); 1088 } 1089 */ 1090 1091 /* 1092 * We can expect fsync on any vnode at all if venus is pruging it. 1093 * Venus can't very well answer the fsync request, now can it? 1094 * Hopefully, it won't have to, because hopefully, venus preserves 1095 * the (possibly untrue) invariant that it never purges an open 1096 * vnode. Hopefully. 1097 */ 1098 if (cp->c_flags & C_PURGING) { 1099 return(0); 1100 } 1101 1102 /* needs research */ 1103 return 0; 1104 error = venus_fsync(vtomi(vp), &cp->c_fid, cred, p); 1105 1106 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); ); 1107 return(error); 1108} 1109 1110int 1111coda_inactive(v) 1112 void *v; 1113{ 1114 /* XXX - at the moment, inactive doesn't look at cred, and doesn't 1115 have a proc pointer. Oops. */ 1116/* true args */ 1117 struct vop_inactive_args *ap = v; 1118 struct vnode *vp = ap->a_vp; 1119 struct cnode *cp = VTOC(vp); 1120 struct ucred *cred __attribute__((unused)) = NULL; 1121 struct proc *p __attribute__((unused)) = curproc; 1122/* upcall decl */ 1123/* locals */ 1124 1125 /* We don't need to send inactive to venus - DCS */ 1126 MARK_ENTRY(CODA_INACTIVE_STATS); 1127 1128 if (IS_CTL_VP(vp)) { 1129 MARK_INT_SAT(CODA_INACTIVE_STATS); 1130 return 0; 1131 } 1132 1133 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n", 1134 cp->c_fid.Volume, cp->c_fid.Vnode, 1135 cp->c_fid.Unique, vp->v_mount));) 1136 1137 /* If an array has been allocated to hold the symlink, deallocate it */ 1138 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { 1139 if (cp->c_symlink == NULL) 1140 panic("coda_inactive: null symlink pointer in cnode"); 1141 1142 CODA_FREE(cp->c_symlink, cp->c_symlen); 1143 cp->c_flags &= ~C_SYMLINK; 1144 cp->c_symlen = 0; 1145 } 1146 1147 /* Remove it from the table so it can't be found. */ 1148 coda_unsave(cp); 1149 if ((struct coda_mntinfo *)(vp->v_mount->mnt_data) == NULL) { 1150 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp)); 1151 panic("badness in coda_inactive\n"); 1152 } 1153 1154 if (IS_UNMOUNTING(cp)) { 1155#ifdef DEBUG 1156 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp); 1157 if (cp->c_ovp != NULL) 1158 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n", 1159 vp->v_usecount, vp, cp); 1160#endif 1161 lockmgr(&cp->c_lock, LK_RELEASE, &vp->v_interlock, p); 1162 } else { 1163#ifdef OLD_DIAGNOSTIC 1164 if (CTOV(cp)->v_usecount) { 1165 panic("coda_inactive: nonzero reference count"); 1166 } 1167 if (cp->c_ovp != NULL) { 1168 panic("coda_inactive: cp->ovp != NULL"); 1169 } 1170#endif 1171 VOP_UNLOCK(vp, 0, p); 1172 vgone(vp); 1173 } 1174 1175 MARK_INT_SAT(CODA_INACTIVE_STATS); 1176 return(0); 1177} 1178 1179/* 1180 * Remote file system operations having to do with directory manipulation. 1181 */ 1182 1183/* 1184 * It appears that in NetBSD, lookup is supposed to return the vnode locked 1185 */ 1186int 1187coda_lookup(v) 1188 void *v; 1189{ 1190/* true args */ 1191 struct vop_lookup_args *ap = v; 1192 struct vnode *dvp = ap->a_dvp; 1193 struct cnode *dcp = VTOC(dvp); 1194 struct vnode **vpp = ap->a_vpp; 1195 /* 1196 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest 1197 * of the string to xlate, and that we must try to get at least 1198 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I 1199 * could be wrong. 1200 */ 1201 struct componentname *cnp = ap->a_cnp; 1202 struct ucred *cred = cnp->cn_cred; 1203 struct proc *p = cnp->cn_proc; 1204/* locals */ 1205 struct cnode *cp; 1206 const char *nm = cnp->cn_nameptr; 1207 int len = cnp->cn_namelen; 1208 ViceFid VFid; 1209 int vtype; 1210 int error = 0; 1211 1212 MARK_ENTRY(CODA_LOOKUP_STATS); 1213 1214 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n", 1215 nm, dcp->c_fid.Volume, 1216 dcp->c_fid.Vnode, dcp->c_fid.Unique));); 1217 1218 /* Check for lookup of control object. */ 1219 if (IS_CTL_NAME(dvp, nm, len)) { 1220 *vpp = coda_ctlvp; 1221 vref(*vpp); 1222 MARK_INT_SAT(CODA_LOOKUP_STATS); 1223 goto exit; 1224 } 1225 1226 if (len+1 > CODA_MAXNAMLEN) { 1227 MARK_INT_FAIL(CODA_LOOKUP_STATS); 1228 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n", 1229 dcp->c_fid.Volume, dcp->c_fid.Vnode, 1230 dcp->c_fid.Unique, nm));); 1231 *vpp = (struct vnode *)0; 1232 error = EINVAL; 1233 goto exit; 1234 } 1235 /* First try to look the file up in the cfs name cache */ 1236 /* lock the parent vnode? */ 1237 cp = coda_nc_lookup(dcp, nm, len, cred); 1238 if (cp) { 1239 *vpp = CTOV(cp); 1240 vref(*vpp); 1241 CODADEBUG(CODA_LOOKUP, 1242 myprintf(("lookup result %d vpp %p\n",error,*vpp));) 1243 } else { 1244 1245 /* The name wasn't cached, so we need to contact Venus */ 1246 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, p, &VFid, &vtype); 1247 1248 if (error) { 1249 MARK_INT_FAIL(CODA_LOOKUP_STATS); 1250 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n", 1251 dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));) 1252 *vpp = (struct vnode *)0; 1253 } else { 1254 MARK_INT_SAT(CODA_LOOKUP_STATS); 1255 CODADEBUG(CODA_LOOKUP, 1256 myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n", 1257 VFid.Volume, VFid.Vnode, VFid.Unique, vtype, 1258 error)); ) 1259 1260 cp = make_coda_node(&VFid, dvp->v_mount, vtype); 1261 *vpp = CTOV(cp); 1262 1263 /* enter the new vnode in the Name Cache only if the top bit isn't set */ 1264 /* And don't enter a new vnode for an invalid one! */ 1265 if (!(vtype & CODA_NOCACHE)) 1266 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1267 } 1268 } 1269 1270 exit: 1271 /* 1272 * If we are creating, and this was the last name to be looked up, 1273 * and the error was ENOENT, then there really shouldn't be an 1274 * error and we can make the leaf NULL and return success. Since 1275 * this is supposed to work under Mach as well as NetBSD, we're 1276 * leaving this fn wrapped. We also must tell lookup/namei that 1277 * we need to save the last component of the name. (Create will 1278 * have to free the name buffer later...lucky us...) 1279 */ 1280 if (((cnp->cn_nameiop == CREATE) || (cnp->cn_nameiop == RENAME)) 1281 && (cnp->cn_flags & ISLASTCN) 1282 && (error == ENOENT)) 1283 { 1284 error = EJUSTRETURN; 1285 cnp->cn_flags |= SAVENAME; 1286 *ap->a_vpp = NULL; 1287 } 1288 1289 /* 1290 * If we are removing, and we are at the last element, and we 1291 * found it, then we need to keep the name around so that the 1292 * removal will go ahead as planned. Unfortunately, this will 1293 * probably also lock the to-be-removed vnode, which may or may 1294 * not be a good idea. I'll have to look at the bits of 1295 * coda_remove to make sure. We'll only save the name if we did in 1296 * fact find the name, otherwise coda_remove won't have a chance 1297 * to free the pathname. 1298 */ 1299 if ((cnp->cn_nameiop == DELETE) 1300 && (cnp->cn_flags & ISLASTCN) 1301 && !error) 1302 { 1303 cnp->cn_flags |= SAVENAME; 1304 } 1305 1306 /* 1307 * If the lookup went well, we need to (potentially?) unlock the 1308 * parent, and lock the child. We are only responsible for 1309 * checking to see if the parent is supposed to be unlocked before 1310 * we return. We must always lock the child (provided there is 1311 * one, and (the parent isn't locked or it isn't the same as the 1312 * parent.) Simple, huh? We can never leave the parent locked unless 1313 * we are ISLASTCN 1314 */ 1315 if (!error || (error == EJUSTRETURN)) { 1316 if (!(cnp->cn_flags & LOCKPARENT) || !(cnp->cn_flags & ISLASTCN)) { 1317 if ((error = VOP_UNLOCK(dvp, 0, p))) { 1318 return error; 1319 } 1320 /* 1321 * The parent is unlocked. As long as there is a child, 1322 * lock it without bothering to check anything else. 1323 */ 1324 if (*ap->a_vpp) { 1325 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 1326 printf("coda_lookup: "); 1327 panic("unlocked parent but couldn't lock child"); 1328 } 1329 } 1330 } else { 1331 /* The parent is locked, and may be the same as the child */ 1332 if (*ap->a_vpp && (*ap->a_vpp != dvp)) { 1333 /* Different, go ahead and lock it. */ 1334 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 1335 printf("coda_lookup: "); 1336 panic("unlocked parent but couldn't lock child"); 1337 } 1338 } 1339 } 1340 } else { 1341 /* If the lookup failed, we need to ensure that the leaf is NULL */ 1342 /* Don't change any locking? */ 1343 *ap->a_vpp = NULL; 1344 } 1345 return(error); 1346} 1347 1348/*ARGSUSED*/ 1349int 1350coda_create(v) 1351 void *v; 1352{ 1353/* true args */ 1354 struct vop_create_args *ap = v; 1355 struct vnode *dvp = ap->a_dvp; 1356 struct cnode *dcp = VTOC(dvp); 1357 struct vattr *va = ap->a_vap; 1358 int exclusive = 1; 1359 int mode = ap->a_vap->va_mode; 1360 struct vnode **vpp = ap->a_vpp; 1361 struct componentname *cnp = ap->a_cnp; 1362 struct ucred *cred = cnp->cn_cred; 1363 struct proc *p = cnp->cn_proc; 1364/* locals */ 1365 int error; 1366 struct cnode *cp; 1367 const char *nm = cnp->cn_nameptr; 1368 int len = cnp->cn_namelen; 1369 ViceFid VFid; 1370 struct vattr attr; 1371 1372 MARK_ENTRY(CODA_CREATE_STATS); 1373 1374 /* All creates are exclusive XXX */ 1375 /* I'm assuming the 'mode' argument is the file mode bits XXX */ 1376 1377 /* Check for create of control object. */ 1378 if (IS_CTL_NAME(dvp, nm, len)) { 1379 *vpp = (struct vnode *)0; 1380 MARK_INT_FAIL(CODA_CREATE_STATS); 1381 return(EACCES); 1382 } 1383 1384 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, p, &VFid, &attr); 1385 1386 if (!error) { 1387 1388 /* If this is an exclusive create, panic if the file already exists. */ 1389 /* Venus should have detected the file and reported EEXIST. */ 1390 1391 if ((exclusive == 1) && 1392 (coda_find(&VFid) != NULL)) 1393 panic("cnode existed for newly created file!"); 1394 1395 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type); 1396 *vpp = CTOV(cp); 1397 1398 /* Update va to reflect the new attributes. */ 1399 (*va) = attr; 1400 1401 /* Update the attribute cache and mark it as valid */ 1402 if (coda_attr_cache) { 1403 VTOC(*vpp)->c_vattr = attr; 1404 VTOC(*vpp)->c_flags |= C_VATTR; 1405 } 1406 1407 /* Invalidate the parent's attr cache, the modification time has changed */ 1408 VTOC(dvp)->c_flags &= ~C_VATTR; 1409 1410 /* enter the new vnode in the Name Cache */ 1411 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1412 1413 CODADEBUG(CODA_CREATE, 1414 myprintf(("create: (%lx.%lx.%lx), result %d\n", 1415 VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 1416 } else { 1417 *vpp = (struct vnode *)0; 1418 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));) 1419 } 1420 1421 if (!error) { 1422 if (cnp->cn_flags & LOCKLEAF) { 1423 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, p))) { 1424 printf("coda_create: "); 1425 panic("unlocked parent but couldn't lock child"); 1426 } 1427 } 1428#ifdef OLD_DIAGNOSTIC 1429 else { 1430 printf("coda_create: LOCKLEAF not set!\n"); 1431 } 1432#endif 1433 } 1434 /* Have to free the previously saved name */ 1435 /* 1436 * This condition is stolen from ufs_makeinode. I have no idea 1437 * why it's here, but what the hey... 1438 */ 1439 if ((cnp->cn_flags & SAVESTART) == 0) { 1440 zfree(namei_zone, cnp->cn_pnbuf); 1441 } 1442 return(error); 1443} 1444 1445int 1446coda_remove(v) 1447 void *v; 1448{ 1449/* true args */ 1450 struct vop_remove_args *ap = v; 1451 struct vnode *dvp = ap->a_dvp; 1452 struct cnode *cp = VTOC(dvp); 1453 struct componentname *cnp = ap->a_cnp; 1454 struct ucred *cred = cnp->cn_cred; 1455 struct proc *p = cnp->cn_proc; 1456/* locals */ 1457 int error; 1458 const char *nm = cnp->cn_nameptr; 1459 int len = cnp->cn_namelen; 1460 struct cnode *tp; 1461 1462 MARK_ENTRY(CODA_REMOVE_STATS); 1463 1464 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n", 1465 nm, cp->c_fid.Volume, cp->c_fid.Vnode, 1466 cp->c_fid.Unique));); 1467 1468 /* Remove the file's entry from the CODA Name Cache */ 1469 /* We're being conservative here, it might be that this person 1470 * doesn't really have sufficient access to delete the file 1471 * but we feel zapping the entry won't really hurt anyone -- dcs 1472 */ 1473 /* I'm gonna go out on a limb here. If a file and a hardlink to it 1474 * exist, and one is removed, the link count on the other will be 1475 * off by 1. We could either invalidate the attrs if cached, or 1476 * fix them. I'll try to fix them. DCS 11/8/94 1477 */ 1478 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred); 1479 if (tp) { 1480 if (VALID_VATTR(tp)) { /* If attrs are cached */ 1481 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */ 1482 tp->c_vattr.va_nlink--; 1483 } 1484 } 1485 1486 coda_nc_zapfile(VTOC(dvp), nm, len); 1487 /* No need to flush it if it doesn't exist! */ 1488 } 1489 /* Invalidate the parent's attr cache, the modification time has changed */ 1490 VTOC(dvp)->c_flags &= ~C_VATTR; 1491 1492 /* Check for remove of control object. */ 1493 if (IS_CTL_NAME(dvp, nm, len)) { 1494 MARK_INT_FAIL(CODA_REMOVE_STATS); 1495 return(ENOENT); 1496 } 1497 1498 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, p); 1499 1500 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); ) 1501 1502 if ((cnp->cn_flags & SAVESTART) == 0) { 1503 zfree(namei_zone, cnp->cn_pnbuf); 1504 } 1505 return(error); 1506} 1507 1508int 1509coda_link(v) 1510 void *v; 1511{ 1512/* true args */ 1513 struct vop_link_args *ap = v; 1514 struct vnode *vp = ap->a_vp; 1515 struct cnode *cp = VTOC(vp); 1516 struct vnode *tdvp = ap->a_tdvp; 1517 struct cnode *tdcp = VTOC(tdvp); 1518 struct componentname *cnp = ap->a_cnp; 1519 struct ucred *cred = cnp->cn_cred; 1520 struct proc *p = cnp->cn_proc; 1521/* locals */ 1522 int error; 1523 const char *nm = cnp->cn_nameptr; 1524 int len = cnp->cn_namelen; 1525 1526 MARK_ENTRY(CODA_LINK_STATS); 1527 1528 if (codadebug & CODADBGMSK(CODA_LINK)) { 1529 1530 myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n", 1531 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1532 myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n", 1533 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 1534 1535 } 1536 if (codadebug & CODADBGMSK(CODA_LINK)) { 1537 myprintf(("link: vp fid: (%lx.%lx.%lx)\n", 1538 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 1539 myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n", 1540 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique)); 1541 1542 } 1543 1544 /* Check for link to/from control object. */ 1545 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) { 1546 MARK_INT_FAIL(CODA_LINK_STATS); 1547 return(EACCES); 1548 } 1549 1550 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, p); 1551 1552 /* Invalidate the parent's attr cache, the modification time has changed */ 1553 VTOC(tdvp)->c_flags &= ~C_VATTR; 1554 VTOC(vp)->c_flags &= ~C_VATTR; 1555 1556 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); ) 1557 1558 /* Drop the name buffer if we don't need to SAVESTART */ 1559 if ((cnp->cn_flags & SAVESTART) == 0) { 1560 zfree(namei_zone, cnp->cn_pnbuf); 1561 } 1562 return(error); 1563} 1564 1565int 1566coda_rename(v) 1567 void *v; 1568{ 1569/* true args */ 1570 struct vop_rename_args *ap = v; 1571 struct vnode *odvp = ap->a_fdvp; 1572 struct cnode *odcp = VTOC(odvp); 1573 struct componentname *fcnp = ap->a_fcnp; 1574 struct vnode *ndvp = ap->a_tdvp; 1575 struct cnode *ndcp = VTOC(ndvp); 1576 struct componentname *tcnp = ap->a_tcnp; 1577 struct ucred *cred = fcnp->cn_cred; 1578 struct proc *p = fcnp->cn_proc; 1579/* true args */ 1580 int error; 1581 const char *fnm = fcnp->cn_nameptr; 1582 int flen = fcnp->cn_namelen; 1583 const char *tnm = tcnp->cn_nameptr; 1584 int tlen = tcnp->cn_namelen; 1585 1586 MARK_ENTRY(CODA_RENAME_STATS); 1587 1588 /* Hmmm. The vnodes are already looked up. Perhaps they are locked? 1589 This could be Bad. XXX */ 1590#ifdef OLD_DIAGNOSTIC 1591 if ((fcnp->cn_cred != tcnp->cn_cred) 1592 || (fcnp->cn_proc != tcnp->cn_proc)) 1593 { 1594 panic("coda_rename: component names don't agree"); 1595 } 1596#endif 1597 1598 /* Check for rename involving control object. */ 1599 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) { 1600 MARK_INT_FAIL(CODA_RENAME_STATS); 1601 return(EACCES); 1602 } 1603 1604 /* Problem with moving directories -- need to flush entry for .. */ 1605 if (odvp != ndvp) { 1606 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred); 1607 if (ovcp) { 1608 struct vnode *ovp = CTOV(ovcp); 1609 if ((ovp) && 1610 (ovp->v_type == VDIR)) /* If it's a directory */ 1611 coda_nc_zapfile(VTOC(ovp),"..", 2); 1612 } 1613 } 1614 1615 /* Remove the entries for both source and target files */ 1616 coda_nc_zapfile(VTOC(odvp), fnm, flen); 1617 coda_nc_zapfile(VTOC(ndvp), tnm, tlen); 1618 1619 /* Invalidate the parent's attr cache, the modification time has changed */ 1620 VTOC(odvp)->c_flags &= ~C_VATTR; 1621 VTOC(ndvp)->c_flags &= ~C_VATTR; 1622 1623 if (flen+1 > CODA_MAXNAMLEN) { 1624 MARK_INT_FAIL(CODA_RENAME_STATS); 1625 error = EINVAL; 1626 goto exit; 1627 } 1628 1629 if (tlen+1 > CODA_MAXNAMLEN) { 1630 MARK_INT_FAIL(CODA_RENAME_STATS); 1631 error = EINVAL; 1632 goto exit; 1633 } 1634 1635 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, p); 1636 1637 exit: 1638 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));) 1639 /* XXX - do we need to call cache pureg on the moved vnode? */ 1640 cache_purge(ap->a_fvp); 1641 1642 /* It seems to be incumbent on us to drop locks on all four vnodes */ 1643 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */ 1644 1645 vrele(ap->a_fvp); 1646 vrele(odvp); 1647 1648 if (ap->a_tvp) { 1649 if (ap->a_tvp == ndvp) { 1650 vrele(ap->a_tvp); 1651 } else { 1652 vput(ap->a_tvp); 1653 } 1654 } 1655 1656 vput(ndvp); 1657 return(error); 1658} 1659 1660int 1661coda_mkdir(v) 1662 void *v; 1663{ 1664/* true args */ 1665 struct vop_mkdir_args *ap = v; 1666 struct vnode *dvp = ap->a_dvp; 1667 struct cnode *dcp = VTOC(dvp); 1668 struct componentname *cnp = ap->a_cnp; 1669 register struct vattr *va = ap->a_vap; 1670 struct vnode **vpp = ap->a_vpp; 1671 struct ucred *cred = cnp->cn_cred; 1672 struct proc *p = cnp->cn_proc; 1673/* locals */ 1674 int error; 1675 const char *nm = cnp->cn_nameptr; 1676 int len = cnp->cn_namelen; 1677 struct cnode *cp; 1678 ViceFid VFid; 1679 struct vattr ova; 1680 1681 MARK_ENTRY(CODA_MKDIR_STATS); 1682 1683 /* Check for mkdir of target object. */ 1684 if (IS_CTL_NAME(dvp, nm, len)) { 1685 *vpp = (struct vnode *)0; 1686 MARK_INT_FAIL(CODA_MKDIR_STATS); 1687 return(EACCES); 1688 } 1689 1690 if (len+1 > CODA_MAXNAMLEN) { 1691 *vpp = (struct vnode *)0; 1692 MARK_INT_FAIL(CODA_MKDIR_STATS); 1693 return(EACCES); 1694 } 1695 1696 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, p, &VFid, &ova); 1697 1698 if (!error) { 1699 if (coda_find(&VFid) != NULL) 1700 panic("cnode existed for newly created directory!"); 1701 1702 1703 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type); 1704 *vpp = CTOV(cp); 1705 1706 /* enter the new vnode in the Name Cache */ 1707 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp)); 1708 1709 /* as a side effect, enter "." and ".." for the directory */ 1710 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp)); 1711 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp)); 1712 1713 if (coda_attr_cache) { 1714 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */ 1715 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */ 1716 } 1717 1718 /* Invalidate the parent's attr cache, the modification time has changed */ 1719 VTOC(dvp)->c_flags &= ~C_VATTR; 1720 1721 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n", 1722 VFid.Volume, VFid.Vnode, VFid.Unique, error)); ) 1723 } else { 1724 *vpp = (struct vnode *)0; 1725 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));) 1726 } 1727 1728 /* Have to free the previously saved name */ 1729 /* 1730 * ufs_mkdir doesn't check for SAVESTART before freeing the 1731 * pathname buffer, but ufs_create does. For the moment, I'll 1732 * follow their lead, but this seems like it is probably 1733 * incorrect. 1734 */ 1735 zfree(namei_zone, cnp->cn_pnbuf); 1736 return(error); 1737} 1738 1739int 1740coda_rmdir(v) 1741 void *v; 1742{ 1743/* true args */ 1744 struct vop_rmdir_args *ap = v; 1745 struct vnode *dvp = ap->a_dvp; 1746 struct cnode *dcp = VTOC(dvp); 1747 struct componentname *cnp = ap->a_cnp; 1748 struct ucred *cred = cnp->cn_cred; 1749 struct proc *p = cnp->cn_proc; 1750/* true args */ 1751 int error; 1752 const char *nm = cnp->cn_nameptr; 1753 int len = cnp->cn_namelen; 1754 struct cnode *cp; 1755 1756 MARK_ENTRY(CODA_RMDIR_STATS); 1757 1758 /* Check for rmdir of control object. */ 1759 if (IS_CTL_NAME(dvp, nm, len)) { 1760 MARK_INT_FAIL(CODA_RMDIR_STATS); 1761 return(ENOENT); 1762 } 1763 1764 /* We're being conservative here, it might be that this person 1765 * doesn't really have sufficient access to delete the file 1766 * but we feel zapping the entry won't really hurt anyone -- dcs 1767 */ 1768 /* 1769 * As a side effect of the rmdir, remove any entries for children of 1770 * the directory, especially "." and "..". 1771 */ 1772 cp = coda_nc_lookup(dcp, nm, len, cred); 1773 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL); 1774 1775 /* Remove the file's entry from the CODA Name Cache */ 1776 coda_nc_zapfile(dcp, nm, len); 1777 1778 /* Invalidate the parent's attr cache, the modification time has changed */ 1779 dcp->c_flags &= ~C_VATTR; 1780 1781 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, p); 1782 1783 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); ) 1784 1785 if ((cnp->cn_flags & SAVESTART) == 0) { 1786 zfree(namei_zone, cnp->cn_pnbuf); 1787 } 1788 return(error); 1789} 1790 1791int 1792coda_symlink(v) 1793 void *v; 1794{ 1795/* true args */ 1796 struct vop_symlink_args *ap = v; 1797 struct vnode *tdvp = ap->a_dvp; 1798 struct cnode *tdcp = VTOC(tdvp); 1799 struct componentname *cnp = ap->a_cnp; 1800 struct vattr *tva = ap->a_vap; 1801 char *path = ap->a_target; 1802 struct ucred *cred = cnp->cn_cred; 1803 struct proc *p = cnp->cn_proc; 1804/* locals */ 1805 int error; 1806 /* 1807 * XXX I'm assuming the following things about coda_symlink's 1808 * arguments: 1809 * t(foo) is the new name/parent/etc being created. 1810 * lname is the contents of the new symlink. 1811 */ 1812 char *nm = cnp->cn_nameptr; 1813 int len = cnp->cn_namelen; 1814 int plen = strlen(path); 1815 1816 /* XXX What about the vpp argument? Do we need it? */ 1817 /* 1818 * Here's the strategy for the moment: perform the symlink, then 1819 * do a lookup to grab the resulting vnode. I know this requires 1820 * two communications with Venus for a new sybolic link, but 1821 * that's the way the ball bounces. I don't yet want to change 1822 * the way the Mach symlink works. When Mach support is 1823 * deprecated, we should change symlink so that the common case 1824 * returns the resultant vnode in a vpp argument. 1825 */ 1826 1827 MARK_ENTRY(CODA_SYMLINK_STATS); 1828 1829 /* Check for symlink of control object. */ 1830 if (IS_CTL_NAME(tdvp, nm, len)) { 1831 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1832 return(EACCES); 1833 } 1834 1835 if (plen+1 > CODA_MAXPATHLEN) { 1836 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1837 return(EINVAL); 1838 } 1839 1840 if (len+1 > CODA_MAXNAMLEN) { 1841 MARK_INT_FAIL(CODA_SYMLINK_STATS); 1842 error = EINVAL; 1843 goto exit; 1844 } 1845 1846 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, p); 1847 1848 /* Invalidate the parent's attr cache, the modification time has changed */ 1849 tdcp->c_flags &= ~C_VATTR; 1850 1851 /* 1852 * Free the name buffer 1853 */ 1854 if ((cnp->cn_flags & SAVESTART) == 0) { 1855 zfree(namei_zone, cnp->cn_pnbuf); 1856 } 1857 1858 exit: 1859 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); ) 1860 return(error); 1861} 1862 1863/* 1864 * Read directory entries. 1865 */ 1866int 1867coda_readdir(v) 1868 void *v; 1869{ 1870/* true args */ 1871 struct vop_readdir_args *ap = v; 1872 struct vnode *vp = ap->a_vp; 1873 struct cnode *cp = VTOC(vp); 1874 register struct uio *uiop = ap->a_uio; 1875 struct ucred *cred = ap->a_cred; 1876 int *eofflag = ap->a_eofflag; 1877 u_long **cookies = ap->a_cookies; 1878 int *ncookies = ap->a_ncookies; 1879 struct proc *p = ap->a_uio->uio_procp; 1880/* upcall decl */ 1881/* locals */ 1882 int error = 0; 1883 1884 MARK_ENTRY(CODA_READDIR_STATS); 1885 1886 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)); ) 1887 1888 /* Check for readdir of control object. */ 1889 if (IS_CTL_VP(vp)) { 1890 MARK_INT_FAIL(CODA_READDIR_STATS); 1891 return(ENOENT); 1892 } 1893 1894 { 1895 /* If directory is not already open do an "internal open" on it. */ 1896 int opened_internally = 0; 1897 if (cp->c_ovp == NULL) { 1898 opened_internally = 1; 1899 MARK_INT_GEN(CODA_OPEN_STATS); 1900 error = VOP_OPEN(vp, FREAD, cred, p); 1901printf("coda_readdir: Internally Opening %p\n", vp); 1902 if (error) { 1903 printf("coda_readdir: VOP_OPEN on container failed %d\n", error); 1904 return (error); 1905 } 1906 if (vp->v_type == VREG) { 1907 error = vfs_object_create(vp, p, cred); 1908 if (error != 0) { 1909 printf("coda_readdir: vfs_object_create() returns %d\n", error); 1910 vput(vp); 1911 } 1912 } 1913 if (error) return(error); 1914 } 1915 1916 /* Have UFS handle the call. */ 1917 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)); ) 1918 error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, ncookies, 1919 cookies); 1920 1921 if (error) 1922 MARK_INT_FAIL(CODA_READDIR_STATS); 1923 else 1924 MARK_INT_SAT(CODA_READDIR_STATS); 1925 1926 /* Do an "internal close" if necessary. */ 1927 if (opened_internally) { 1928 MARK_INT_GEN(CODA_CLOSE_STATS); 1929 (void)VOP_CLOSE(vp, FREAD, cred, p); 1930 } 1931 } 1932 1933 return(error); 1934} 1935 1936/* 1937 * Convert from file system blocks to device blocks 1938 */ 1939int 1940coda_bmap(v) 1941 void *v; 1942{ 1943 /* XXX on the global proc */ 1944/* true args */ 1945 struct vop_bmap_args *ap = v; 1946 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */ 1947 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */ 1948 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */ 1949 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */ 1950 struct proc *p __attribute__((unused)) = curproc; 1951/* upcall decl */ 1952/* locals */ 1953 1954 int ret = 0; 1955 struct cnode *cp; 1956 1957 cp = VTOC(vp); 1958 if (cp->c_ovp) { 1959 return EINVAL; 1960 ret = VOP_BMAP(cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb); 1961#if 0 1962 printf("VOP_BMAP(cp->c_ovp %p, bn %p, vpp %p, bnp %p, ap->a_runp %p, ap->a_runb %p) = %d\n", 1963 cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb, ret); 1964#endif 1965 return ret; 1966 } else { 1967#if 0 1968 printf("coda_bmap: no container\n"); 1969#endif 1970 return(EOPNOTSUPP); 1971 } 1972} 1973 1974/* 1975 * I don't think the following two things are used anywhere, so I've 1976 * commented them out 1977 * 1978 * struct buf *async_bufhead; 1979 * int async_daemon_count; 1980 */ 1981int 1982coda_strategy(v) 1983 void *v; 1984{ 1985/* true args */ 1986 struct vop_strategy_args *ap = v; 1987 register struct buf *bp __attribute__((unused)) = ap->a_bp; 1988 struct proc *p __attribute__((unused)) = curproc; 1989/* upcall decl */ 1990/* locals */ 1991 1992 printf("coda_strategy: called ???\n"); 1993 return(EOPNOTSUPP); 1994} 1995 1996int 1997coda_reclaim(v) 1998 void *v; 1999{ 2000/* true args */ 2001 struct vop_reclaim_args *ap = v; 2002 struct vnode *vp = ap->a_vp; 2003 struct cnode *cp = VTOC(vp); 2004/* upcall decl */ 2005/* locals */ 2006 2007/* 2008 * Forced unmount/flush will let vnodes with non zero use be destroyed! 2009 */ 2010 ENTRY; 2011 2012 if (IS_UNMOUNTING(cp)) { 2013#ifdef DEBUG 2014 if (VTOC(vp)->c_ovp) { 2015 if (IS_UNMOUNTING(cp)) 2016 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp); 2017 } 2018#endif 2019 } else { 2020#ifdef OLD_DIAGNOSTIC 2021 if (vp->v_usecount != 0) 2022 print("coda_reclaim: pushing active %p\n", vp); 2023 if (VTOC(vp)->c_ovp) { 2024 panic("coda_reclaim: c_ovp not void"); 2025 } 2026#endif 2027 } 2028 cache_purge(vp); 2029 coda_free(VTOC(vp)); 2030 VTOC(vp) = NULL; 2031 return (0); 2032} 2033 2034int 2035coda_lock(v) 2036 void *v; 2037{ 2038/* true args */ 2039 struct vop_lock_args *ap = v; 2040 struct vnode *vp = ap->a_vp; 2041 struct cnode *cp = VTOC(vp); 2042 struct proc *p = ap->a_p; 2043/* upcall decl */ 2044/* locals */ 2045 2046 ENTRY; 2047 2048 if (coda_lockdebug) { 2049 myprintf(("Attempting lock on %lx.%lx.%lx\n", 2050 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 2051 } 2052 2053#ifndef DEBUG_LOCKS 2054 return (lockmgr(&cp->c_lock, ap->a_flags, &vp->v_interlock, p)); 2055#else 2056 return (debuglockmgr(&cp->c_lock, ap->a_flags, &vp->v_interlock, p, 2057 "coda_lock", vp->filename, vp->line)); 2058#endif 2059} 2060 2061int 2062coda_unlock(v) 2063 void *v; 2064{ 2065/* true args */ 2066 struct vop_unlock_args *ap = v; 2067 struct vnode *vp = ap->a_vp; 2068 struct cnode *cp = VTOC(vp); 2069 struct proc *p = ap->a_p; 2070/* upcall decl */ 2071/* locals */ 2072 2073 ENTRY; 2074 if (coda_lockdebug) { 2075 myprintf(("Attempting unlock on %lx.%lx.%lx\n", 2076 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique)); 2077 } 2078 2079 return (lockmgr(&cp->c_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock, p)); 2080} 2081 2082int 2083coda_islocked(v) 2084 void *v; 2085{ 2086/* true args */ 2087 struct vop_islocked_args *ap = v; 2088 struct cnode *cp = VTOC(ap->a_vp); 2089 ENTRY; 2090 2091 return (lockstatus(&cp->c_lock)); 2092} 2093 2094/* How one looks up a vnode given a device/inode pair: */ 2095int 2096coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp) 2097{ 2098 /* This is like VFS_VGET() or igetinode()! */ 2099 int error; 2100 struct mount *mp; 2101 2102 if (!(mp = devtomp(dev))) { 2103 myprintf(("coda_grab_vnode: devtomp(%d) returns NULL\n", dev)); 2104 return(ENXIO); 2105 } 2106 2107 /* XXX - ensure that nonzero-return means failure */ 2108 error = VFS_VGET(mp,ino,vpp); 2109 if (error) { 2110 myprintf(("coda_grab_vnode: iget/vget(%d, %d) returns %p, err %d\n", 2111 dev, ino, *vpp, error)); 2112 return(ENOENT); 2113 } 2114 return(0); 2115} 2116 2117void 2118print_vattr( attr ) 2119 struct vattr *attr; 2120{ 2121 char *typestr; 2122 2123 switch (attr->va_type) { 2124 case VNON: 2125 typestr = "VNON"; 2126 break; 2127 case VREG: 2128 typestr = "VREG"; 2129 break; 2130 case VDIR: 2131 typestr = "VDIR"; 2132 break; 2133 case VBLK: 2134 typestr = "VBLK"; 2135 break; 2136 case VCHR: 2137 typestr = "VCHR"; 2138 break; 2139 case VLNK: 2140 typestr = "VLNK"; 2141 break; 2142 case VSOCK: 2143 typestr = "VSCK"; 2144 break; 2145 case VFIFO: 2146 typestr = "VFFO"; 2147 break; 2148 case VBAD: 2149 typestr = "VBAD"; 2150 break; 2151 default: 2152 typestr = "????"; 2153 break; 2154 } 2155 2156 2157 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n", 2158 typestr, (int)attr->va_mode, (int)attr->va_uid, 2159 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev)); 2160 2161 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n", 2162 (int)attr->va_fileid, (int)attr->va_nlink, 2163 (int)attr->va_size, 2164 (int)attr->va_blocksize,(int)attr->va_bytes)); 2165 myprintf((" gen %ld flags %ld vaflags %d\n", 2166 attr->va_gen, attr->va_flags, attr->va_vaflags)); 2167 myprintf((" atime sec %d nsec %d\n", 2168 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec)); 2169 myprintf((" mtime sec %d nsec %d\n", 2170 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec)); 2171 myprintf((" ctime sec %d nsec %d\n", 2172 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec)); 2173} 2174 2175/* How to print a ucred */ 2176void 2177print_cred(cred) 2178 struct ucred *cred; 2179{ 2180 2181 int i; 2182 2183 myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid)); 2184 2185 for (i=0; i < cred->cr_ngroups; i++) 2186 myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i])); 2187 myprintf(("\n")); 2188 2189} 2190 2191/* 2192 * Return a vnode for the given fid. 2193 * If no cnode exists for this fid create one and put it 2194 * in a table hashed by fid.Volume and fid.Vnode. If the cnode for 2195 * this fid is already in the table return it (ref count is 2196 * incremented by coda_find. The cnode will be flushed from the 2197 * table when coda_inactive calls coda_unsave. 2198 */ 2199struct cnode * 2200make_coda_node(fid, vfsp, type) 2201 ViceFid *fid; struct mount *vfsp; short type; 2202{ 2203 struct cnode *cp; 2204 int err; 2205 2206 if ((cp = coda_find(fid)) == NULL) { 2207 struct vnode *vp; 2208 2209 cp = coda_alloc(); 2210 lockinit(&cp->c_lock, PINOD, "cnode", 0, 0); 2211 cp->c_fid = *fid; 2212 2213 err = getnewvnode(VT_CODA, vfsp, coda_vnodeop_p, &vp); 2214 if (err) { 2215 panic("coda: getnewvnode returned error %d\n", err); 2216 } 2217 vp->v_data = cp; 2218 vp->v_type = type; 2219 cp->c_vnode = vp; 2220 coda_save(cp); 2221 2222 } else { 2223 vref(CTOV(cp)); 2224 } 2225 2226 return cp; 2227} 2228