3 * Coda: an Experimental Distributed File System
6 * Copyright (c) 1987-1998 Carnegie Mellon University
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
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.
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.
29 * @(#) src/sys/coda/coda_vnops.c,v 1.1.1.1 1998/08/29 21:14:52 rvb Exp $
30 * $FreeBSD: src/sys/coda/coda_vnops.c,v 1.22.2.1 2001/06/29 16:26:22 shafeeq Exp $
31 * $DragonFly: src/sys/vfs/coda/Attic/coda_vnops.c,v 1.22 2004/10/12 19:20:50 dillon Exp $
36 * Mach Operating System
37 * Copyright (c) 1990 Carnegie-Mellon University
38 * Copyright (c) 1989 Carnegie-Mellon University
39 * All rights reserved. The CMU software License Agreement specifies
40 * the terms and conditions for use and redistribution.
44 * This code was written for the Coda file system at Carnegie Mellon
45 * University. Contributers include David Steere, James Kistler, and
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/kernel.h>
53 #include <sys/malloc.h>
54 #include <sys/mount.h>
55 #include <sys/errno.h>
58 #include <sys/fcntl.h>
60 #include <sys/namei.h>
61 #include <sys/ioccom.h>
62 #include <sys/select.h>
65 #include <vm/vm_object.h>
66 #include <vm/vm_extern.h>
67 #include <vm/vm_zone.h>
71 #include "coda_vnops.h"
72 #include "coda_venus.h"
73 #include "coda_opstats.h"
74 #include "coda_subr.h"
75 #include "coda_namecache.h"
76 #include "coda_pioctl.h"
79 * These flags select various performance enhancements.
81 int coda_attr_cache = 1; /* Set to cache attributes in the kernel */
82 int coda_symlink_cache = 1; /* Set to cache symbolic link information */
83 int coda_access_cache = 1; /* Set to handle some access checks directly */
85 /* structure to keep track of vfs calls */
87 struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE];
89 #define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++)
90 #define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++)
91 #define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++)
92 #define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++)
94 /* What we are delaying for in printf */
95 int coda_printf_delay = 0; /* in microseconds */
96 int coda_vnop_print_entry = 0;
97 static int coda_lockdebug = 0;
99 /* Definition of the vfs operation vector */
102 * Some NetBSD details:
104 * coda_start is called at the end of the mount syscall.
105 * coda_init is called at boot time.
108 #define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__FUNCTION__))
110 /* Definition of the vnode operation vector */
112 struct vnodeopv_entry_desc coda_vnodeop_entries[] = {
113 { &vop_default_desc, (void *)coda_vop_error },
114 { &vop_lookup_desc, (void *)coda_lookup }, /* lookup */
115 { &vop_create_desc, (void *)coda_create }, /* create */
116 { &vop_mknod_desc, (void *)coda_vop_error }, /* mknod */
117 { &vop_open_desc, (void *)coda_open }, /* open */
118 { &vop_close_desc, (void *)coda_close }, /* close */
119 { &vop_access_desc, (void *)coda_access }, /* access */
120 { &vop_getattr_desc, (void *)coda_getattr }, /* getattr */
121 { &vop_setattr_desc, (void *)coda_setattr }, /* setattr */
122 { &vop_read_desc, (void *)coda_read }, /* read */
123 { &vop_write_desc, (void *)coda_write }, /* write */
124 { &vop_ioctl_desc, (void *)coda_ioctl }, /* ioctl */
125 { &vop_mmap_desc, (void *)coda_vop_error }, /* mmap */
126 { &vop_fsync_desc, (void *)coda_fsync }, /* fsync */
127 { &vop_remove_desc, (void *)coda_remove }, /* remove */
128 { &vop_link_desc, (void *)coda_link }, /* link */
129 { &vop_rename_desc, (void *)coda_rename }, /* rename */
130 { &vop_mkdir_desc, (void *)coda_mkdir }, /* mkdir */
131 { &vop_rmdir_desc, (void *)coda_rmdir }, /* rmdir */
132 { &vop_symlink_desc, (void *)coda_symlink }, /* symlink */
133 { &vop_readdir_desc, (void *)coda_readdir }, /* readdir */
134 { &vop_readlink_desc, (void *)coda_readlink }, /* readlink */
135 { &vop_inactive_desc, (void *)coda_inactive }, /* inactive */
136 { &vop_reclaim_desc, (void *)coda_reclaim }, /* reclaim */
137 { &vop_lock_desc, (void *)coda_lock }, /* lock */
138 { &vop_unlock_desc, (void *)coda_unlock }, /* unlock */
139 { &vop_bmap_desc, (void *)coda_bmap }, /* bmap */
140 { &vop_strategy_desc, (void *)coda_strategy }, /* strategy */
141 { &vop_print_desc, (void *)coda_vop_error }, /* print */
142 { &vop_islocked_desc, (void *)coda_islocked }, /* islocked */
143 { &vop_pathconf_desc, (void *)coda_vop_error }, /* pathconf */
144 { &vop_advlock_desc, (void *)coda_vop_nop }, /* advlock */
145 { &vop_bwrite_desc, (void *)coda_vop_error }, /* bwrite */
146 { &vop_lease_desc, (void *)coda_vop_nop }, /* lease */
147 { &vop_poll_desc, (void *) vop_stdpoll }, /* poll */
148 { &vop_getpages_desc, (void *)coda_fbsd_getpages }, /* pager intf.*/
149 { &vop_putpages_desc, (void *)coda_fbsd_putpages }, /* pager intf.*/
150 { &vop_createvobject_desc, (void *) vop_stdcreatevobject },
151 { &vop_destroyvobject_desc, (void *) vop_stddestroyvobject },
152 { &vop_getvobject_desc, (void *) vop_stdgetvobject },
156 we need to define these someday
157 #define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
158 #define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
159 #define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc)
160 #define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee)
161 #define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb)
164 { &vop_reallocblks_desc, (void *) ufs_missingop },
165 { &vop_cachedlookup_desc, (void *) ufs_lookup },
166 { &vop_whiteout_desc, (void *) ufs_whiteout },
171 /* A generic panic: we were called with something we didn't define yet */
173 coda_vop_error(void *anon)
175 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
177 myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n",
178 (*desc)->vdesc_name));
180 panic("coda_vop_error");
185 /* A generic do-nothing. For lease_check, advlock */
187 coda_vop_nop(void *anon)
189 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
192 myprintf(("Vnode operation %s called, but unsupported\n",
193 (*desc)->vdesc_name));
199 coda_vnodeopstats_init(void)
203 for(i=0;i<CODA_VNODEOPS_SIZE;i++) {
204 coda_vnodeopstats[i].opcode = i;
205 coda_vnodeopstats[i].entries = 0;
206 coda_vnodeopstats[i].sat_intrn = 0;
207 coda_vnodeopstats[i].unsat_intrn = 0;
208 coda_vnodeopstats[i].gen_intrn = 0;
214 * coda_open calls Venus to return the device, inode pair of the cache
215 * file holding the data. Using iget, coda_open finds the vnode of the
216 * cache file, and then opens it.
222 * NetBSD can pass the O_EXCL flag in mode, even though the check
223 * has already happened. Venus defensively assumes that if open
224 * is passed the EXCL, it must be a bug. We strip the flag here.
227 struct vop_open_args *ap = v;
228 struct vnode **vpp = &(ap->a_vp);
229 struct cnode *cp = VTOC(*vpp);
230 int flag = ap->a_mode & (~O_EXCL);
231 struct ucred *cred = ap->a_cred;
232 struct thread *td = ap->a_td;
239 MARK_ENTRY(CODA_OPEN_STATS);
241 /* Check for open of control file. */
242 if (IS_CTL_VP(*vpp)) {
244 /* if (WRITEABLE(flag)) */
245 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) {
246 MARK_INT_FAIL(CODA_OPEN_STATS);
249 MARK_INT_SAT(CODA_OPEN_STATS);
253 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, td, &dev, &inode);
257 CODADEBUG( CODA_OPEN,myprintf(("open: dev %#lx inode %lu result %d\n",
258 (u_long)dev2udev(dev), (u_long)inode,
262 /* Translate the <device, inode> pair for the cache file into
264 error = coda_grab_vnode(dev, inode, &vp);
268 /* We get the vnode back locked. Needs unlocked */
269 VOP_UNLOCK(vp, 0, td);
270 /* Keep a reference until the close comes in. */
273 /* Save the vnode pointer for the cache file. */
274 if (cp->c_ovp == NULL) {
278 panic("coda_open: cp->c_ovp != ITOV(ip)");
282 /* Flush the attribute cached if writing the file. */
285 cp->c_flags &= ~C_VATTR;
288 /* Save the <device, inode> pair for the cache file to speed
289 up subsequent page_read's. */
293 /* Open the cache file. */
294 error = VOP_OPEN(vp, flag, cred, td);
296 printf("coda_open: VOP_OPEN on container failed %d\n", error);
299 /* grab (above) does this when it calls newvnode unless it's in the cache*/
300 if (vp->v_type == VREG) {
301 error = vfs_object_create(vp, td);
303 printf("coda_open: vfs_object_create() returns %d\n", error);
312 * Close the cache file used for I/O and notify Venus.
318 struct vop_close_args *ap = v;
319 struct vnode *vp = ap->a_vp;
320 struct cnode *cp = VTOC(vp);
321 int flag = ap->a_fflag;
322 struct thread *td = ap->a_td;
326 MARK_ENTRY(CODA_CLOSE_STATS);
328 /* Check for close of control file. */
330 MARK_INT_SAT(CODA_CLOSE_STATS);
334 if (IS_UNMOUNTING(cp)) {
337 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n",
338 vp->v_usecount, cp->c_ovp, vp, cp);
343 VOP_CLOSE(cp->c_ovp, flag, td); /* Do errors matter here? */
348 printf("coda_close: NO container vp %p/cp %p\n", vp, cp);
353 VOP_CLOSE(cp->c_ovp, flag, td); /* Do errors matter here? */
357 if (--cp->c_ocount == 0)
360 if (flag & FWRITE) /* file was opened for write */
363 error = venus_close(vtomi(vp), &cp->c_fid, flag, proc0.p_ucred, td);
366 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); )
373 struct vop_read_args *ap = v;
376 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ,
377 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_td));
383 struct vop_write_args *ap = v;
386 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE,
387 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_td));
391 coda_rdwr(struct vnode *vp, struct uio *uiop, enum uio_rw rw, int ioflag,
392 struct ucred *cred, struct thread *td)
395 /* NOTE: container file operation!!! */
397 struct cnode *cp = VTOC(vp);
398 struct vnode *cfvp = cp->c_ovp;
399 int igot_internally = 0;
400 int opened_internally = 0;
403 MARK_ENTRY(CODA_RDWR_STATS);
405 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %d, %lld, %d)\n", rw,
406 (void *)uiop->uio_iov->iov_base, uiop->uio_resid,
407 (long long)uiop->uio_offset, uiop->uio_segflg)); )
409 /* Check for rdwr of control object. */
411 MARK_INT_FAIL(CODA_RDWR_STATS);
416 * If file is not already open this must be a page
417 * {read,write} request. Iget the cache file's inode
418 * pointer if we still have its <device, inode> pair.
419 * Otherwise, we must do an internal open to derive the
424 * If we're dumping core, do the internal open. Otherwise
425 * venus won't have the correct size of the core when
426 * it's completely written.
428 if (cp->c_inode != 0 && (ioflag & IO_CORE) == 0) {
430 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp);
432 MARK_INT_FAIL(CODA_RDWR_STATS);
436 * We get the vnode back locked in both Mach and
437 * NetBSD. Needs unlocked
439 VOP_UNLOCK(cfvp, 0, td);
442 opened_internally = 1;
443 MARK_INT_GEN(CODA_OPEN_STATS);
444 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE),
446 printf("coda_rdwr: Internally Opening %p\n", vp);
448 printf("coda_rdwr: VOP_OPEN on container failed %d\n", error);
451 if (vp->v_type == VREG) {
452 error = vfs_object_create(vp, td);
454 printf("coda_rdwr: vfs_object_create() returns %d\n", error);
459 MARK_INT_FAIL(CODA_RDWR_STATS);
466 /* Have UFS handle the call. */
467 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n",
468 cp->c_fid.Volume, cp->c_fid.Vnode,
469 cp->c_fid.Unique, CTOV(cp)->v_usecount)); )
472 if (rw == UIO_READ) {
473 error = VOP_READ(cfvp, uiop, ioflag, cred);
475 error = VOP_WRITE(cfvp, uiop, ioflag, cred);
476 /* ufs_write updates the vnode_pager_setsize for the vnode/object */
480 if (VOP_GETATTR(cfvp, &attr, td) == 0) {
481 vnode_pager_setsize(vp, attr.va_size);
487 MARK_INT_FAIL(CODA_RDWR_STATS);
489 MARK_INT_SAT(CODA_RDWR_STATS);
491 /* Do an internal close if necessary. */
492 if (opened_internally) {
493 MARK_INT_GEN(CODA_CLOSE_STATS);
494 (void)VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), td);
497 /* Invalidate cached attributes if writing. */
499 cp->c_flags &= ~C_VATTR;
507 struct vop_ioctl_args *ap = v;
508 struct vnode *vp = ap->a_vp;
509 int com = ap->a_command;
510 caddr_t data = ap->a_data;
511 int flag = ap->a_fflag;
512 struct ucred *cred = ap->a_cred;
513 struct thread *td = ap->a_td;
517 struct nameidata ndp;
518 struct PioctlData *iap = (struct PioctlData *)data;
520 MARK_ENTRY(CODA_IOCTL_STATS);
522 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));)
524 /* Don't check for operation on a dying object, for ctlvp it
527 /* Must be control object to succeed. */
528 if (!IS_CTL_VP(vp)) {
529 MARK_INT_FAIL(CODA_IOCTL_STATS);
530 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));)
533 /* Look up the pathname. */
535 /* Should we use the name cache here? It would get it from
536 lookupname sooner or later anyway, right? */
538 NDINIT(&ndp, NAMEI_LOOKUP, (iap->follow ? CNP_FOLLOW : 0), UIO_USERSPACE, iap->path, td);
543 MARK_INT_FAIL(CODA_IOCTL_STATS);
544 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n",
550 * Make sure this is a coda style cnode, but it may be a
553 if (tvp->v_tag != VT_CODA) {
555 NDFREE(&ndp, NDF_ONLY_PNBUF);
556 MARK_INT_FAIL(CODA_IOCTL_STATS);
557 CODADEBUG(CODA_IOCTL,
558 myprintf(("coda_ioctl error: %s not a coda object\n",
563 if (iap->vi.in_size > VC_MAXDATASIZE) {
567 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, td);
570 MARK_INT_FAIL(CODA_IOCTL_STATS);
572 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); )
575 NDFREE(&ndp, NDF_ONLY_PNBUF);
580 * To reduce the cost of a user-level venus;we cache attributes in
581 * the kernel. Each cnode has storage allocated for an attribute. If
582 * c_vattr is valid, return a reference to it. Otherwise, get the
583 * attributes from venus and store them in the cnode. There is some
584 * question if this method is a security leak. But I think that in
585 * order to make this call, the user must have done a lookup and
586 * opened the file, and therefore should already have access.
589 coda_getattr(void *v)
592 struct vop_getattr_args *ap = v;
593 struct vnode *vp = ap->a_vp;
594 struct cnode *cp = VTOC(vp);
595 struct vattr *vap = ap->a_vap;
596 struct thread *td = ap->a_td;
600 MARK_ENTRY(CODA_GETATTR_STATS);
602 if (IS_UNMOUNTING(cp))
605 /* Check for getattr of control object. */
607 MARK_INT_FAIL(CODA_GETATTR_STATS);
611 /* Check to see if the attributes have already been cached */
612 if (VALID_VATTR(cp)) {
613 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n",
616 cp->c_fid.Unique));});
617 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR))
618 print_vattr(&cp->c_vattr); );
621 MARK_INT_SAT(CODA_GETATTR_STATS);
625 error = venus_getattr(vtomi(vp), &cp->c_fid, proc0.p_ucred, td, vap);
628 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n",
634 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR))
637 { int size = vap->va_size;
638 struct vnode *convp = cp->c_ovp;
639 if (convp != (struct vnode *)0) {
640 vnode_pager_setsize(convp, size);
643 /* If not open for write, store attributes in cnode */
644 if ((cp->c_owrite == 0) && (coda_attr_cache)) {
646 cp->c_flags |= C_VATTR;
654 coda_setattr(void *v)
657 struct vop_setattr_args *ap = v;
658 struct vnode *vp = ap->a_vp;
659 struct cnode *cp = VTOC(vp);
660 struct vattr *vap = ap->a_vap;
661 struct ucred *cred = ap->a_cred;
662 struct thread *td = ap->a_td;
666 MARK_ENTRY(CODA_SETATTR_STATS);
668 /* Check for setattr of control object. */
670 MARK_INT_FAIL(CODA_SETATTR_STATS);
674 if (codadebug & CODADBGMSK(CODA_SETATTR)) {
677 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, td);
680 cp->c_flags &= ~C_VATTR;
682 { int size = vap->va_size;
683 struct vnode *convp = cp->c_ovp;
684 if (size != VNOVAL && convp != (struct vnode *)0) {
685 vnode_pager_setsize(convp, size);
688 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); )
696 struct vop_access_args *ap = v;
697 struct vnode *vp = ap->a_vp;
698 struct cnode *cp = VTOC(vp);
699 int mode = ap->a_mode;
700 struct ucred *cred = ap->a_cred;
701 struct thread *td = ap->a_td;
705 MARK_ENTRY(CODA_ACCESS_STATS);
707 /* Check for access of control object. Only read access is
710 /* bogus hack - all will be marked as successes */
711 MARK_INT_SAT(CODA_ACCESS_STATS);
712 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC)))
717 * if the file is a directory, and we are checking exec (eg lookup)
718 * access, and the file is in the namecache, then the user must have
719 * lookup access to it.
721 if (coda_access_cache) {
722 if ((vp->v_type == VDIR) && (mode & VEXEC)) {
723 if (coda_nc_lookup(cp, ".", 1, cred)) {
724 MARK_INT_SAT(CODA_ACCESS_STATS);
725 return(0); /* it was in the cache */
730 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, td);
736 coda_readlink(void *v)
739 struct vop_readlink_args *ap = v;
740 struct vnode *vp = ap->a_vp;
741 struct cnode *cp = VTOC(vp);
742 struct uio *uiop = ap->a_uio;
743 struct ucred *cred = ap->a_cred;
744 struct thread *td = ap->a_uio->uio_td;
750 MARK_ENTRY(CODA_READLINK_STATS);
752 /* Check for readlink of control object. */
754 MARK_INT_FAIL(CODA_READLINK_STATS);
758 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */
759 uiop->uio_rw = UIO_READ;
760 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop);
762 MARK_INT_FAIL(CODA_READLINK_STATS);
764 MARK_INT_SAT(CODA_READLINK_STATS);
768 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, td, &str, &len);
771 uiop->uio_rw = UIO_READ;
772 error = uiomove(str, len, uiop);
774 if (coda_symlink_cache) {
777 cp->c_flags |= C_SYMLINK;
782 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));)
790 struct vop_fsync_args *ap = v;
791 struct vnode *vp = ap->a_vp;
792 struct cnode *cp = VTOC(vp);
793 struct thread *td = ap->a_td;
795 struct vnode *convp = cp->c_ovp;
798 MARK_ENTRY(CODA_FSYNC_STATS);
800 /* Check for fsync on an unmounting object */
801 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync
802 * after an unmount has been initiated. This is a Bad Thing,
803 * which we have to avoid. Not a legitimate failure for stats.
805 if (IS_UNMOUNTING(cp)) {
809 /* Check for fsync of control object. */
811 MARK_INT_SAT(CODA_FSYNC_STATS);
816 VOP_FSYNC(convp, MNT_WAIT, td);
819 * We see fsyncs with usecount == 1 then usecount == 0.
820 * For now we ignore them.
823 if (!vp->v_usecount) {
824 printf("coda_fsync on vnode %p with %d usecount. c_flags = %x (%x)\n",
825 vp, vp->v_usecount, cp->c_flags, cp->c_flags&C_PURGING);
830 * We can expect fsync on any vnode at all if venus is pruging it.
831 * Venus can't very well answer the fsync request, now can it?
832 * Hopefully, it won't have to, because hopefully, venus preserves
833 * the (possibly untrue) invariant that it never purges an open
836 if (cp->c_flags & C_PURGING) {
842 error = venus_fsync(vtomi(vp), &cp->c_fid, proc0.p_ucred, td);
844 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); );
849 coda_inactive(void *v)
851 /* XXX - at the moment, inactive doesn't look at cred, and doesn't
852 have a proc pointer. Oops. */
854 struct vop_inactive_args *ap = v;
855 struct vnode *vp = ap->a_vp;
856 struct cnode *cp = VTOC(vp);
857 struct ucred *cred __attribute__((unused)) = NULL;
858 /*struct thread *td = curthread;*/
862 /* We don't need to send inactive to venus - DCS */
863 MARK_ENTRY(CODA_INACTIVE_STATS);
866 MARK_INT_SAT(CODA_INACTIVE_STATS);
870 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n",
871 cp->c_fid.Volume, cp->c_fid.Vnode,
872 cp->c_fid.Unique, vp->v_mount));)
874 /* If an array has been allocated to hold the symlink, deallocate it */
875 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) {
876 if (cp->c_symlink == NULL)
877 panic("coda_inactive: null symlink pointer in cnode");
879 CODA_FREE(cp->c_symlink, cp->c_symlen);
880 cp->c_flags &= ~C_SYMLINK;
884 /* Remove it from the table so it can't be found. */
886 if ((struct coda_mntinfo *)(vp->v_mount->mnt_data) == NULL) {
887 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp));
888 panic("badness in coda_inactive\n");
891 if (IS_UNMOUNTING(cp)) {
893 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp);
894 if (cp->c_ovp != NULL)
895 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n",
896 vp->v_usecount, vp, cp);
899 #ifdef OLD_DIAGNOSTIC
900 if (CTOV(cp)->v_usecount) {
901 panic("coda_inactive: nonzero reference count");
903 if (cp->c_ovp != NULL) {
904 panic("coda_inactive: cp->ovp != NULL");
910 MARK_INT_SAT(CODA_INACTIVE_STATS);
915 * Remote file system operations having to do with directory manipulation.
919 * It appears that in NetBSD, lookup is supposed to return the vnode locked
925 struct vop_lookup_args *ap = v;
926 struct vnode *dvp = ap->a_dvp;
927 struct cnode *dcp = VTOC(dvp);
928 struct vnode **vpp = ap->a_vpp;
930 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest
931 * of the string to xlate, and that we must try to get at least
932 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I
935 struct componentname *cnp = ap->a_cnp;
936 struct ucred *cred = cnp->cn_cred;
937 struct thread *td = cnp->cn_td;
940 const char *nm = cnp->cn_nameptr;
941 int len = cnp->cn_namelen;
946 MARK_ENTRY(CODA_LOOKUP_STATS);
948 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n",
949 nm, dcp->c_fid.Volume,
950 dcp->c_fid.Vnode, dcp->c_fid.Unique)););
952 /* Check for lookup of control object. */
953 if (IS_CTL_NAME(dvp, nm, len)) {
956 MARK_INT_SAT(CODA_LOOKUP_STATS);
960 if (len+1 > CODA_MAXNAMLEN) {
961 MARK_INT_FAIL(CODA_LOOKUP_STATS);
962 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n",
963 dcp->c_fid.Volume, dcp->c_fid.Vnode,
964 dcp->c_fid.Unique, nm)););
965 *vpp = (struct vnode *)0;
969 /* First try to look the file up in the cfs name cache */
970 /* lock the parent vnode? */
971 cp = coda_nc_lookup(dcp, nm, len, cred);
975 CODADEBUG(CODA_LOOKUP,
976 myprintf(("lookup result %d vpp %p\n",error,*vpp));)
979 /* The name wasn't cached, so we need to contact Venus */
980 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, td, &VFid, &vtype);
983 MARK_INT_FAIL(CODA_LOOKUP_STATS);
984 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n",
985 dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));)
986 *vpp = (struct vnode *)0;
988 MARK_INT_SAT(CODA_LOOKUP_STATS);
989 CODADEBUG(CODA_LOOKUP,
990 myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n",
991 VFid.Volume, VFid.Vnode, VFid.Unique, vtype,
994 cp = make_coda_node(&VFid, dvp->v_mount, vtype);
997 /* enter the new vnode in the Name Cache only if the top bit isn't set */
998 /* And don't enter a new vnode for an invalid one! */
999 if (!(vtype & CODA_NOCACHE))
1000 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1006 * If we are creating, and this was the last name to be looked up,
1007 * and the error was ENOENT, then there really shouldn't be an
1008 * error and we can make the leaf NULL and return success. Since
1009 * this is supposed to work under Mach as well as NetBSD, we're
1010 * leaving this fn wrapped. We also must tell lookup/namei that
1011 * we need to save the last component of the name. (Create will
1012 * have to free the name buffer later...lucky us...)
1014 if (((cnp->cn_nameiop == NAMEI_CREATE) || (cnp->cn_nameiop == NAMEI_RENAME))
1015 && (cnp->cn_flags & CNP_ISLASTCN)
1016 && (error == ENOENT))
1018 error = EJUSTRETURN;
1019 cnp->cn_flags |= CNP_SAVENAME;
1024 * If we are removing, and we are at the last element, and we
1025 * found it, then we need to keep the name around so that the
1026 * removal will go ahead as planned. Unfortunately, this will
1027 * probably also lock the to-be-removed vnode, which may or may
1028 * not be a good idea. I'll have to look at the bits of
1029 * coda_remove to make sure. We'll only save the name if we did in
1030 * fact find the name, otherwise coda_remove won't have a chance
1031 * to free the pathname.
1033 if ((cnp->cn_nameiop == NAMEI_DELETE)
1034 && (cnp->cn_flags & CNP_ISLASTCN)
1037 cnp->cn_flags |= CNP_SAVENAME;
1041 * If the lookup went well, we need to (potentially?) unlock the
1042 * parent, and lock the child. We are only responsible for
1043 * checking to see if the parent is supposed to be unlocked before
1044 * we return. We must always lock the child (provided there is
1045 * one, and (the parent isn't locked or it isn't the same as the
1046 * parent.) Simple, huh? We can never leave the parent locked unless
1049 if (!error || (error == EJUSTRETURN)) {
1050 if (!(cnp->cn_flags & CNP_LOCKPARENT) || !(cnp->cn_flags & CNP_ISLASTCN)) {
1051 if ((error = VOP_UNLOCK(dvp, 0, td))) {
1055 * The parent is unlocked. As long as there is a child,
1056 * lock it without bothering to check anything else.
1059 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1060 printf("coda_lookup: ");
1061 panic("unlocked parent but couldn't lock child");
1065 /* The parent is locked, and may be the same as the child */
1066 if (*ap->a_vpp && (*ap->a_vpp != dvp)) {
1067 /* Different, go ahead and lock it. */
1068 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1069 printf("coda_lookup: ");
1070 panic("unlocked parent but couldn't lock child");
1075 /* If the lookup failed, we need to ensure that the leaf is NULL */
1076 /* Don't change any locking? */
1084 coda_create(void *v)
1087 struct vop_create_args *ap = v;
1088 struct vnode *dvp = ap->a_dvp;
1089 struct cnode *dcp = VTOC(dvp);
1090 struct vattr *va = ap->a_vap;
1092 int mode = ap->a_vap->va_mode;
1093 struct vnode **vpp = ap->a_vpp;
1094 struct componentname *cnp = ap->a_cnp;
1095 struct ucred *cred = cnp->cn_cred;
1096 struct thread *td = cnp->cn_td;
1100 const char *nm = cnp->cn_nameptr;
1101 int len = cnp->cn_namelen;
1105 MARK_ENTRY(CODA_CREATE_STATS);
1107 /* All creates are exclusive XXX */
1108 /* I'm assuming the 'mode' argument is the file mode bits XXX */
1110 /* Check for create of control object. */
1111 if (IS_CTL_NAME(dvp, nm, len)) {
1112 *vpp = (struct vnode *)0;
1113 MARK_INT_FAIL(CODA_CREATE_STATS);
1117 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, td, &VFid, &attr);
1121 /* If this is an exclusive create, panic if the file already exists. */
1122 /* Venus should have detected the file and reported EEXIST. */
1124 if ((exclusive == 1) &&
1125 (coda_find(&VFid) != NULL))
1126 panic("cnode existed for newly created file!");
1128 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type);
1131 /* Update va to reflect the new attributes. */
1134 /* Update the attribute cache and mark it as valid */
1135 if (coda_attr_cache) {
1136 VTOC(*vpp)->c_vattr = attr;
1137 VTOC(*vpp)->c_flags |= C_VATTR;
1140 /* Invalidate the parent's attr cache, the modification time has changed */
1141 VTOC(dvp)->c_flags &= ~C_VATTR;
1143 /* enter the new vnode in the Name Cache */
1144 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1146 CODADEBUG(CODA_CREATE,
1147 myprintf(("create: (%lx.%lx.%lx), result %d\n",
1148 VFid.Volume, VFid.Vnode, VFid.Unique, error)); )
1150 *vpp = (struct vnode *)0;
1151 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));)
1155 if (cnp->cn_flags & CNP_LOCKLEAF) {
1156 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1157 printf("coda_create: ");
1158 panic("unlocked parent but couldn't lock child");
1161 #ifdef OLD_DIAGNOSTIC
1163 printf("coda_create: LOCKLEAF not set!\n");
1171 coda_remove(void *v)
1174 struct vop_remove_args *ap = v;
1175 struct vnode *dvp = ap->a_dvp;
1176 struct cnode *cp = VTOC(dvp);
1177 struct componentname *cnp = ap->a_cnp;
1178 struct ucred *cred = cnp->cn_cred;
1179 struct thread *td = cnp->cn_td;
1182 const char *nm = cnp->cn_nameptr;
1183 int len = cnp->cn_namelen;
1186 MARK_ENTRY(CODA_REMOVE_STATS);
1188 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n",
1189 nm, cp->c_fid.Volume, cp->c_fid.Vnode,
1190 cp->c_fid.Unique)););
1192 /* Remove the file's entry from the CODA Name Cache */
1193 /* We're being conservative here, it might be that this person
1194 * doesn't really have sufficient access to delete the file
1195 * but we feel zapping the entry won't really hurt anyone -- dcs
1197 /* I'm gonna go out on a limb here. If a file and a hardlink to it
1198 * exist, and one is removed, the link count on the other will be
1199 * off by 1. We could either invalidate the attrs if cached, or
1200 * fix them. I'll try to fix them. DCS 11/8/94
1202 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred);
1204 if (VALID_VATTR(tp)) { /* If attrs are cached */
1205 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */
1206 tp->c_vattr.va_nlink--;
1210 coda_nc_zapfile(VTOC(dvp), nm, len);
1211 /* No need to flush it if it doesn't exist! */
1213 /* Invalidate the parent's attr cache, the modification time has changed */
1214 VTOC(dvp)->c_flags &= ~C_VATTR;
1216 /* Check for remove of control object. */
1217 if (IS_CTL_NAME(dvp, nm, len)) {
1218 MARK_INT_FAIL(CODA_REMOVE_STATS);
1222 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, td);
1224 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); )
1233 struct vop_link_args *ap = v;
1234 struct vnode *vp = ap->a_vp;
1235 struct cnode *cp = VTOC(vp);
1236 struct vnode *tdvp = ap->a_tdvp;
1237 struct cnode *tdcp = VTOC(tdvp);
1238 struct componentname *cnp = ap->a_cnp;
1239 struct ucred *cred = cnp->cn_cred;
1240 struct thread *td = cnp->cn_td;
1243 const char *nm = cnp->cn_nameptr;
1244 int len = cnp->cn_namelen;
1246 MARK_ENTRY(CODA_LINK_STATS);
1248 if (codadebug & CODADBGMSK(CODA_LINK)) {
1250 myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n",
1251 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1252 myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n",
1253 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique));
1256 if (codadebug & CODADBGMSK(CODA_LINK)) {
1257 myprintf(("link: vp fid: (%lx.%lx.%lx)\n",
1258 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1259 myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n",
1260 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique));
1264 /* Check for link to/from control object. */
1265 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) {
1266 MARK_INT_FAIL(CODA_LINK_STATS);
1270 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, td);
1272 /* Invalidate the parent's attr cache, the modification time has changed */
1273 VTOC(tdvp)->c_flags &= ~C_VATTR;
1274 VTOC(vp)->c_flags &= ~C_VATTR;
1276 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); )
1282 coda_rename(void *v)
1285 struct vop_rename_args *ap = v;
1286 struct vnode *odvp = ap->a_fdvp;
1287 struct cnode *odcp = VTOC(odvp);
1288 struct componentname *fcnp = ap->a_fcnp;
1289 struct vnode *ndvp = ap->a_tdvp;
1290 struct cnode *ndcp = VTOC(ndvp);
1291 struct componentname *tcnp = ap->a_tcnp;
1292 struct ucred *cred = fcnp->cn_cred;
1293 struct thread *td = fcnp->cn_td;
1296 const char *fnm = fcnp->cn_nameptr;
1297 int flen = fcnp->cn_namelen;
1298 const char *tnm = tcnp->cn_nameptr;
1299 int tlen = tcnp->cn_namelen;
1301 MARK_ENTRY(CODA_RENAME_STATS);
1303 /* Hmmm. The vnodes are already looked up. Perhaps they are locked?
1304 This could be Bad. XXX */
1305 #ifdef OLD_DIAGNOSTIC
1306 if ((fcnp->cn_cred != tcnp->cn_cred) || (fcnp->cn_td != tcnp->cn_td))
1308 panic("coda_rename: component names don't agree");
1312 /* Check for rename involving control object. */
1313 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) {
1314 MARK_INT_FAIL(CODA_RENAME_STATS);
1318 /* Problem with moving directories -- need to flush entry for .. */
1320 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred);
1322 struct vnode *ovp = CTOV(ovcp);
1324 (ovp->v_type == VDIR)) /* If it's a directory */
1325 coda_nc_zapfile(VTOC(ovp),"..", 2);
1329 /* Remove the entries for both source and target files */
1330 coda_nc_zapfile(VTOC(odvp), fnm, flen);
1331 coda_nc_zapfile(VTOC(ndvp), tnm, tlen);
1333 /* Invalidate the parent's attr cache, the modification time has changed */
1334 VTOC(odvp)->c_flags &= ~C_VATTR;
1335 VTOC(ndvp)->c_flags &= ~C_VATTR;
1337 if (flen+1 > CODA_MAXNAMLEN) {
1338 MARK_INT_FAIL(CODA_RENAME_STATS);
1343 if (tlen+1 > CODA_MAXNAMLEN) {
1344 MARK_INT_FAIL(CODA_RENAME_STATS);
1349 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, td);
1352 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));)
1353 /* XXX - do we need to call cache pureg on the moved vnode? */
1354 cache_purge(ap->a_fvp);
1356 /* It seems to be incumbent on us to drop locks on all four vnodes */
1357 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */
1363 if (ap->a_tvp == ndvp) {
1378 struct vop_mkdir_args *ap = v;
1379 struct vnode *dvp = ap->a_dvp;
1380 struct cnode *dcp = VTOC(dvp);
1381 struct componentname *cnp = ap->a_cnp;
1382 struct vattr *va = ap->a_vap;
1383 struct vnode **vpp = ap->a_vpp;
1384 struct ucred *cred = cnp->cn_cred;
1385 struct thread *td = cnp->cn_td;
1388 const char *nm = cnp->cn_nameptr;
1389 int len = cnp->cn_namelen;
1394 MARK_ENTRY(CODA_MKDIR_STATS);
1396 /* Check for mkdir of target object. */
1397 if (IS_CTL_NAME(dvp, nm, len)) {
1398 *vpp = (struct vnode *)0;
1399 MARK_INT_FAIL(CODA_MKDIR_STATS);
1403 if (len+1 > CODA_MAXNAMLEN) {
1404 *vpp = (struct vnode *)0;
1405 MARK_INT_FAIL(CODA_MKDIR_STATS);
1409 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, td, &VFid, &ova);
1412 if (coda_find(&VFid) != NULL)
1413 panic("cnode existed for newly created directory!");
1416 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type);
1419 /* enter the new vnode in the Name Cache */
1420 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1422 /* as a side effect, enter "." and ".." for the directory */
1423 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp));
1424 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp));
1426 if (coda_attr_cache) {
1427 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */
1428 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */
1431 /* Invalidate the parent's attr cache, the modification time has changed */
1432 VTOC(dvp)->c_flags &= ~C_VATTR;
1434 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n",
1435 VFid.Volume, VFid.Vnode, VFid.Unique, error)); )
1437 *vpp = (struct vnode *)0;
1438 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));)
1448 struct vop_rmdir_args *ap = v;
1449 struct vnode *dvp = ap->a_dvp;
1450 struct cnode *dcp = VTOC(dvp);
1451 struct componentname *cnp = ap->a_cnp;
1452 struct ucred *cred = cnp->cn_cred;
1453 struct thread *td = cnp->cn_td;
1456 const char *nm = cnp->cn_nameptr;
1457 int len = cnp->cn_namelen;
1460 MARK_ENTRY(CODA_RMDIR_STATS);
1462 /* Check for rmdir of control object. */
1463 if (IS_CTL_NAME(dvp, nm, len)) {
1464 MARK_INT_FAIL(CODA_RMDIR_STATS);
1468 /* We're being conservative here, it might be that this person
1469 * doesn't really have sufficient access to delete the file
1470 * but we feel zapping the entry won't really hurt anyone -- dcs
1473 * As a side effect of the rmdir, remove any entries for children of
1474 * the directory, especially "." and "..".
1476 cp = coda_nc_lookup(dcp, nm, len, cred);
1477 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL);
1479 /* Remove the file's entry from the CODA Name Cache */
1480 coda_nc_zapfile(dcp, nm, len);
1482 /* Invalidate the parent's attr cache, the modification time has changed */
1483 dcp->c_flags &= ~C_VATTR;
1485 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, td);
1487 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); )
1493 coda_symlink(void *v)
1496 struct vop_symlink_args *ap = v;
1497 struct vnode *tdvp = ap->a_dvp;
1498 struct cnode *tdcp = VTOC(tdvp);
1499 struct componentname *cnp = ap->a_cnp;
1500 struct vattr *tva = ap->a_vap;
1501 char *path = ap->a_target;
1502 struct ucred *cred = cnp->cn_cred;
1503 struct thread *td = cnp->cn_td;
1504 struct vnode **vpp = ap->a_vpp;
1508 * XXX I'm assuming the following things about coda_symlink's
1510 * t(foo) is the new name/parent/etc being created.
1511 * lname is the contents of the new symlink.
1513 char *nm = cnp->cn_nameptr;
1514 int len = cnp->cn_namelen;
1515 int plen = strlen(path);
1518 * Here's the strategy for the moment: perform the symlink, then
1519 * do a lookup to grab the resulting vnode. I know this requires
1520 * two communications with Venus for a new sybolic link, but
1521 * that's the way the ball bounces. I don't yet want to change
1522 * the way the Mach symlink works. When Mach support is
1523 * deprecated, we should change symlink so that the common case
1524 * returns the resultant vnode in a vpp argument.
1527 MARK_ENTRY(CODA_SYMLINK_STATS);
1529 /* Check for symlink of control object. */
1530 if (IS_CTL_NAME(tdvp, nm, len)) {
1531 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1535 if (plen+1 > CODA_MAXPATHLEN) {
1536 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1540 if (len+1 > CODA_MAXNAMLEN) {
1541 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1546 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, td);
1548 /* Invalidate the parent's attr cache, the modification time has changed */
1549 tdcp->c_flags &= ~C_VATTR;
1552 error = VOP_LOOKUP(tdvp, vpp, cnp);
1555 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); )
1560 * Read directory entries.
1563 coda_readdir(void *v)
1566 struct vop_readdir_args *ap = v;
1567 struct vnode *vp = ap->a_vp;
1568 struct cnode *cp = VTOC(vp);
1569 struct uio *uiop = ap->a_uio;
1570 struct ucred *cred = ap->a_cred;
1571 int *eofflag = ap->a_eofflag;
1572 u_long **cookies = ap->a_cookies;
1573 int *ncookies = ap->a_ncookies;
1574 struct thread *td = ap->a_uio->uio_td;
1579 MARK_ENTRY(CODA_READDIR_STATS);
1581 CODADEBUG(CODA_READDIR, myprintf(("coda_readdir(%p, %d, %lld, %d)\n",
1582 (void *)uiop->uio_iov->iov_base,
1584 (long long)uiop->uio_offset,
1585 uiop->uio_segflg)); )
1587 /* Check for readdir of control object. */
1588 if (IS_CTL_VP(vp)) {
1589 MARK_INT_FAIL(CODA_READDIR_STATS);
1594 /* If directory is not already open do an "internal open" on it. */
1595 int opened_internally = 0;
1596 if (cp->c_ovp == NULL) {
1597 opened_internally = 1;
1598 MARK_INT_GEN(CODA_OPEN_STATS);
1599 error = VOP_OPEN(vp, FREAD, cred, td);
1600 printf("coda_readdir: Internally Opening %p\n", vp);
1602 printf("coda_readdir: VOP_OPEN on container failed %d\n", error);
1605 if (vp->v_type == VREG) {
1606 error = vfs_object_create(vp, td);
1608 printf("coda_readdir: vfs_object_create() returns %d\n", error);
1612 if (error) return(error);
1615 /* Have UFS handle the call. */
1616 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)); )
1617 error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, ncookies,
1621 MARK_INT_FAIL(CODA_READDIR_STATS);
1623 MARK_INT_SAT(CODA_READDIR_STATS);
1625 /* Do an "internal close" if necessary. */
1626 if (opened_internally) {
1627 MARK_INT_GEN(CODA_CLOSE_STATS);
1628 (void)VOP_CLOSE(vp, FREAD, td);
1636 * Convert from file system blocks to device blocks
1641 /* XXX on the global proc */
1643 struct vop_bmap_args *ap = v;
1644 struct vnode *vp __attribute__((unused)) = ap->a_vp; /* file's vnode */
1645 daddr_t bn __attribute__((unused)) = ap->a_bn; /* fs block number */
1646 struct vnode **vpp = ap->a_vpp; /* RETURN vp of device */
1647 daddr_t *bnp __attribute__((unused)) = ap->a_bnp; /* RETURN device block number */
1657 ret = VOP_BMAP(cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb);
1659 printf("VOP_BMAP(cp->c_ovp %p, bn %p, vpp %p, bnp %p, ap->a_runp %p, ap->a_runb %p) = %d\n",
1660 cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb, ret);
1665 printf("coda_bmap: no container\n");
1672 * I don't think the following two things are used anywhere, so I've
1673 * commented them out
1675 * struct buf *async_bufhead;
1676 * int async_daemon_count;
1679 coda_strategy(void *v)
1682 struct vop_strategy_args *ap = v;
1683 struct buf *bp __attribute__((unused)) = ap->a_bp;
1687 printf("coda_strategy: called ???\n");
1692 coda_reclaim(void *v)
1695 struct vop_reclaim_args *ap = v;
1696 struct vnode *vp = ap->a_vp;
1697 struct cnode *cp = VTOC(vp);
1702 * Forced unmount/flush will let vnodes with non zero use be destroyed!
1706 if (IS_UNMOUNTING(cp)) {
1708 if (VTOC(vp)->c_ovp) {
1709 if (IS_UNMOUNTING(cp))
1710 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp);
1714 #ifdef OLD_DIAGNOSTIC
1715 if (vp->v_usecount != 0)
1716 print("coda_reclaim: pushing active %p\n", vp);
1717 if (VTOC(vp)->c_ovp) {
1718 panic("coda_reclaim: c_ovp not void");
1722 coda_free(VTOC(vp));
1731 struct vop_lock_args *ap = v;
1732 struct vnode *vp = ap->a_vp;
1733 struct cnode *cp = VTOC(vp);
1734 struct thread *td = ap->a_td;
1740 if (coda_lockdebug) {
1741 myprintf(("Attempting lock on %lx.%lx.%lx\n",
1742 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1746 return (lockmgr(&vp->v_lock, ap->a_flags, NULL, td));
1748 return (debuglockmgr(&vp->v_lock, ap->a_flags, NULL, td,
1749 "coda_lock", vp->filename, vp->line));
1754 coda_unlock(void *v)
1757 struct vop_unlock_args *ap = v;
1758 struct vnode *vp = ap->a_vp;
1759 struct cnode *cp = VTOC(vp);
1760 struct thread *td = ap->a_td;
1765 if (coda_lockdebug) {
1766 myprintf(("Attempting unlock on %lx.%lx.%lx\n",
1767 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1770 return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, NULL, td));
1774 coda_islocked(void *v)
1777 struct vop_islocked_args *ap = v;
1780 return (lockstatus(&ap->a_vp->v_lock, ap->a_td));
1783 /* How one looks up a vnode given a device/inode pair: */
1785 coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp)
1787 /* This is like VFS_VGET() or igetinode()! */
1791 if (!(mp = devtomp(dev))) {
1792 myprintf(("coda_grab_vnode: devtomp(%#lx) returns NULL\n",
1793 (u_long)dev2udev(dev)));
1797 /* XXX - ensure that nonzero-return means failure */
1798 error = VFS_VGET(mp,ino,vpp);
1800 myprintf(("coda_grab_vnode: iget/vget(%lx, %lu) returns %p, err %d\n",
1801 (u_long)dev2udev(dev), (u_long)ino, (void *)*vpp, error));
1808 print_vattr(struct vattr *attr)
1812 switch (attr->va_type) {
1846 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n",
1847 typestr, (int)attr->va_mode, (int)attr->va_uid,
1848 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev));
1850 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n",
1851 (int)attr->va_fileid, (int)attr->va_nlink,
1853 (int)attr->va_blocksize,(int)attr->va_bytes));
1854 myprintf((" gen %ld flags %ld vaflags %d\n",
1855 attr->va_gen, attr->va_flags, attr->va_vaflags));
1856 myprintf((" atime sec %d nsec %d\n",
1857 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec));
1858 myprintf((" mtime sec %d nsec %d\n",
1859 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec));
1860 myprintf((" ctime sec %d nsec %d\n",
1861 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec));
1864 /* How to print a ucred */
1866 print_cred(struct ucred *cred)
1871 myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid));
1873 for (i=0; i < cred->cr_ngroups; i++)
1874 myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i]));
1880 * Return a vnode for the given fid.
1881 * If no cnode exists for this fid create one and put it
1882 * in a table hashed by fid.Volume and fid.Vnode. If the cnode for
1883 * this fid is already in the table return it (ref count is
1884 * incremented by coda_find. The cnode will be flushed from the
1885 * table when coda_inactive calls coda_unsave.
1888 make_coda_node(ViceFid *fid, struct mount *vfsp, short type)
1893 if ((cp = coda_find(fid)) == NULL) {
1899 err = getnewvnode(VT_CODA, vfsp, vfsp->mnt_vn_ops, &vp, 0, 0);
1901 panic("coda: getnewvnode returned error %d\n", err);