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 1.34 2006/04/23 03:08:04 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/nlookup.h>
61 #include <sys/namei.h>
62 #include <sys/ioccom.h>
63 #include <sys/select.h>
66 #include <vm/vm_object.h>
67 #include <vm/vm_extern.h>
68 #include <vm/vm_zone.h>
72 #include "coda_vnops.h"
73 #include "coda_venus.h"
74 #include "coda_opstats.h"
75 #include "coda_subr.h"
76 #include "coda_namecache.h"
77 #include "coda_pioctl.h"
80 * These flags select various performance enhancements.
82 int coda_attr_cache = 1; /* Set to cache attributes in the kernel */
83 int coda_symlink_cache = 1; /* Set to cache symbolic link information */
84 int coda_access_cache = 1; /* Set to handle some access checks directly */
86 /* structure to keep track of vfs calls */
88 struct coda_op_stats coda_vnodeopstats[CODA_VNODEOPS_SIZE];
90 #define MARK_ENTRY(op) (coda_vnodeopstats[op].entries++)
91 #define MARK_INT_SAT(op) (coda_vnodeopstats[op].sat_intrn++)
92 #define MARK_INT_FAIL(op) (coda_vnodeopstats[op].unsat_intrn++)
93 #define MARK_INT_GEN(op) (coda_vnodeopstats[op].gen_intrn++)
95 /* What we are delaying for in printf */
96 int coda_printf_delay = 0; /* in microseconds */
97 int coda_vnop_print_entry = 0;
98 static int coda_lockdebug = 0;
100 /* Definition of the vfs operation vector */
103 * Some NetBSD details:
105 * coda_start is called at the end of the mount syscall.
106 * coda_init is called at boot time.
109 #define ENTRY if(coda_vnop_print_entry) myprintf(("Entered %s\n",__func__))
111 /* Definition of the vnode operation vector */
113 struct vnodeopv_entry_desc coda_vnodeop_entries[] = {
114 { &vop_default_desc, (vnodeopv_entry_t)coda_vop_error },
115 { &vop_old_lookup_desc, (vnodeopv_entry_t)coda_lookup }, /* lookup */
116 { &vop_old_create_desc, (vnodeopv_entry_t)coda_create }, /* create */
117 { &vop_old_mknod_desc, (vnodeopv_entry_t)coda_vop_error }, /* mknod */
118 { &vop_open_desc, (vnodeopv_entry_t)coda_open }, /* open */
119 { &vop_close_desc, (vnodeopv_entry_t)coda_close }, /* close */
120 { &vop_access_desc, (vnodeopv_entry_t)coda_access }, /* access */
121 { &vop_getattr_desc, (vnodeopv_entry_t)coda_getattr }, /* getattr */
122 { &vop_setattr_desc, (vnodeopv_entry_t)coda_setattr }, /* setattr */
123 { &vop_read_desc, (vnodeopv_entry_t)coda_read }, /* read */
124 { &vop_write_desc, (vnodeopv_entry_t)coda_write }, /* write */
125 { &vop_ioctl_desc, (vnodeopv_entry_t)coda_ioctl }, /* ioctl */
126 { &vop_mmap_desc, (vnodeopv_entry_t)coda_vop_error }, /* mmap */
127 { &vop_fsync_desc, (vnodeopv_entry_t)coda_fsync }, /* fsync */
128 { &vop_old_remove_desc, (vnodeopv_entry_t)coda_remove }, /* remove */
129 { &vop_old_link_desc, (vnodeopv_entry_t)coda_link }, /* link */
130 { &vop_old_rename_desc, (vnodeopv_entry_t)coda_rename }, /* rename */
131 { &vop_old_mkdir_desc, (vnodeopv_entry_t)coda_mkdir }, /* mkdir */
132 { &vop_old_rmdir_desc, (vnodeopv_entry_t)coda_rmdir }, /* rmdir */
133 { &vop_old_symlink_desc, (vnodeopv_entry_t)coda_symlink }, /* symlink */
134 { &vop_readdir_desc, (vnodeopv_entry_t)coda_readdir }, /* readdir */
135 { &vop_readlink_desc, (vnodeopv_entry_t)coda_readlink }, /* readlink */
136 { &vop_inactive_desc, (vnodeopv_entry_t)coda_inactive }, /* inactive */
137 { &vop_reclaim_desc, (vnodeopv_entry_t)coda_reclaim }, /* reclaim */
138 { &vop_lock_desc, (vnodeopv_entry_t)coda_lock }, /* lock */
139 { &vop_unlock_desc, (vnodeopv_entry_t)coda_unlock }, /* unlock */
140 { &vop_bmap_desc, (vnodeopv_entry_t)coda_bmap }, /* bmap */
141 { &vop_strategy_desc, (vnodeopv_entry_t)coda_strategy }, /* strategy */
142 { &vop_print_desc, (vnodeopv_entry_t)coda_vop_error }, /* print */
143 { &vop_islocked_desc, (vnodeopv_entry_t)coda_islocked }, /* islocked */
144 { &vop_pathconf_desc, (vnodeopv_entry_t)coda_vop_error }, /* pathconf */
145 { &vop_advlock_desc, (vnodeopv_entry_t)coda_vop_nop }, /* advlock */
146 { &vop_bwrite_desc, (vnodeopv_entry_t)coda_vop_error }, /* bwrite */
147 { &vop_poll_desc, (vnodeopv_entry_t)vop_stdpoll }, /* poll */
148 { &vop_getpages_desc, (vnodeopv_entry_t)coda_fbsd_getpages }, /* pager intf.*/
149 { &vop_putpages_desc, (vnodeopv_entry_t)coda_fbsd_putpages }, /* pager intf.*/
153 we need to define these someday
154 #define UFS_BLKATOFF(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_blkatoff(aa, bb, cc, dd)
155 #define UFS_VALLOC(aa, bb, cc, dd) VFSTOUFS((aa)->v_mount)->um_valloc(aa, bb, cc, dd)
156 #define UFS_VFREE(aa, bb, cc) VFSTOUFS((aa)->v_mount)->um_vfree(aa, bb, cc)
157 #define UFS_TRUNCATE(aa, bb, cc, dd, ee) VFSTOUFS((aa)->v_mount)->um_truncate(aa, bb, cc, dd, ee)
158 #define UFS_UPDATE(aa, bb) VFSTOUFS((aa)->v_mount)->um_update(aa, bb)
161 { &vop_reallocblks_desc, (vnodeopv_entry_t) ufs_missingop },
162 { &vop_old_lookup_desc, (vnodeopv_entry_t) ufs_lookup },
163 { &vop_old_whiteout_desc, (vnodeopv_entry_t) ufs_whiteout },
168 /* A generic panic: we were called with something we didn't define yet */
170 coda_vop_error(void *anon)
172 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
174 myprintf(("coda_vop_error: Vnode operation %s called, but not defined.\n",
175 (*desc)->vdesc_name));
177 panic("coda_vop_error");
182 /* A generic do-nothing. For lease_check, advlock */
184 coda_vop_nop(void *anon)
186 struct vnodeop_desc **desc = (struct vnodeop_desc **)anon;
189 myprintf(("Vnode operation %s called, but unsupported\n",
190 (*desc)->vdesc_name));
196 coda_vnodeopstats_init(void)
200 for(i=0;i<CODA_VNODEOPS_SIZE;i++) {
201 coda_vnodeopstats[i].opcode = i;
202 coda_vnodeopstats[i].entries = 0;
203 coda_vnodeopstats[i].sat_intrn = 0;
204 coda_vnodeopstats[i].unsat_intrn = 0;
205 coda_vnodeopstats[i].gen_intrn = 0;
211 * coda_open calls Venus to return the device, inode pair of the cache
212 * file holding the data. Using iget, coda_open finds the vnode of the
213 * cache file, and then opens it.
219 * NetBSD can pass the O_EXCL flag in mode, even though the check
220 * has already happened. Venus defensively assumes that if open
221 * is passed the EXCL, it must be a bug. We strip the flag here.
224 struct vop_open_args *ap = v;
225 struct vnode **vpp = &(ap->a_vp);
226 struct cnode *cp = VTOC(*vpp);
227 int flag = ap->a_mode & (~O_EXCL);
228 struct ucred *cred = ap->a_cred;
229 struct thread *td = ap->a_td;
236 MARK_ENTRY(CODA_OPEN_STATS);
238 /* Check for open of control file. */
239 if (IS_CTL_VP(*vpp)) {
241 /* if (WRITEABLE(flag)) */
242 if (flag & (FWRITE | O_TRUNC | O_CREAT | O_EXCL)) {
243 MARK_INT_FAIL(CODA_OPEN_STATS);
247 MARK_INT_SAT(CODA_OPEN_STATS);
252 error = venus_open(vtomi((*vpp)), &cp->c_fid, flag, cred, td, &dev, &inode);
256 CODADEBUG( CODA_OPEN,myprintf(("open: dev %#lx inode %lu result %d\n",
257 (u_long)dev2udev(dev), (u_long)inode,
261 /* Translate the <device, inode> pair for the cache file into
263 error = coda_grab_vnode(dev, inode, &vp);
267 /* We get the vnode back locked. Needs unlocked */
268 VOP_UNLOCK(vp, 0, td);
269 /* Keep a reference until the close comes in. */
272 /* Save the vnode pointer for the cache file. */
273 if (cp->c_ovp == NULL) {
277 panic("coda_open: cp->c_ovp != ITOV(ip)");
281 /* Flush the attribute cached if writing the file. */
284 cp->c_flags &= ~C_VATTR;
287 /* Save the <device, inode> pair for the cache file to speed
288 up subsequent page_read's. */
292 /* Open the cache file. */
293 error = VOP_OPEN(vp, flag, cred, NULL, td);
295 printf("coda_open: VOP_OPEN on container failed %d\n", error);
298 /* grab (above) does this when it calls newvnode unless it's in the cache*/
299 if (vp->v_type == VREG) {
300 if (vp->v_object == NULL) {
302 printf("coda_open: cache file vp %p has no VM object!\n", vp);
313 * Close the cache file used for I/O and notify Venus.
319 struct vop_close_args *ap = v;
320 struct vnode *vp = ap->a_vp;
321 struct cnode *cp = VTOC(vp);
322 int flag = ap->a_fflag;
323 struct thread *td = ap->a_td;
327 MARK_ENTRY(CODA_CLOSE_STATS);
329 /* Check for close of control file. */
331 MARK_INT_SAT(CODA_CLOSE_STATS);
336 if (IS_UNMOUNTING(cp)) {
339 printf("coda_close: destroying container ref %d, ufs vp %p of vp %p/cp %p\n",
340 vp->v_usecount, cp->c_ovp, vp, cp);
345 VOP_CLOSE(cp->c_ovp, flag, td); /* Do errors matter here? */
350 printf("coda_close: NO container vp %p/cp %p\n", vp, cp);
356 VOP_CLOSE(cp->c_ovp, flag, td); /* Do errors matter here? */
360 if (--cp->c_ocount == 0)
363 if (flag & FWRITE) /* file was opened for write */
366 error = venus_close(vtomi(vp), &cp->c_fid, flag, proc0.p_ucred, td);
369 CODADEBUG(CODA_CLOSE, myprintf(("close: result %d\n",error)); )
378 struct vop_read_args *ap = v;
381 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_READ,
382 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_td));
388 struct vop_write_args *ap = v;
391 return(coda_rdwr(ap->a_vp, ap->a_uio, UIO_WRITE,
392 ap->a_ioflag, ap->a_cred, ap->a_uio->uio_td));
396 coda_rdwr(struct vnode *vp, struct uio *uiop, enum uio_rw rw, int ioflag,
397 struct ucred *cred, struct thread *td)
400 /* NOTE: container file operation!!! */
402 struct cnode *cp = VTOC(vp);
403 struct vnode *cfvp = cp->c_ovp;
404 int igot_internally = 0;
405 int opened_internally = 0;
408 MARK_ENTRY(CODA_RDWR_STATS);
410 CODADEBUG(CODA_RDWR, myprintf(("coda_rdwr(%d, %p, %d, %lld, %d)\n", rw,
411 (void *)uiop->uio_iov->iov_base, uiop->uio_resid,
412 (long long)uiop->uio_offset, uiop->uio_segflg)); )
414 /* Check for rdwr of control object. */
416 MARK_INT_FAIL(CODA_RDWR_STATS);
421 * If file is not already open this must be a page
422 * {read,write} request. Iget the cache file's inode
423 * pointer if we still have its <device, inode> pair.
424 * Otherwise, we must do an internal open to derive the
429 * If we're dumping core, do the internal open. Otherwise
430 * venus won't have the correct size of the core when
431 * it's completely written.
433 if (cp->c_inode != 0 && (ioflag & IO_CORE) == 0) {
435 error = coda_grab_vnode(cp->c_device, cp->c_inode, &cfvp);
437 MARK_INT_FAIL(CODA_RDWR_STATS);
441 * We get the vnode back locked in both Mach and
442 * NetBSD. Needs unlocked
444 VOP_UNLOCK(cfvp, 0, td);
447 opened_internally = 1;
448 MARK_INT_GEN(CODA_OPEN_STATS);
449 error = VOP_OPEN(vp, (rw == UIO_READ ? FREAD : FWRITE),
451 printf("coda_rdwr: Internally Opening %p\n", vp);
453 printf("coda_rdwr: VOP_OPEN on container failed %d\n", error);
456 if (vp->v_type == VREG) {
457 if (vp->v_object == NULL) {
459 printf("coda_rdwr: vnode %p has no VM object!\n", vp);
464 MARK_INT_FAIL(CODA_RDWR_STATS);
471 /* Have UFS handle the call. */
472 CODADEBUG(CODA_RDWR, myprintf(("indirect rdwr: fid = (%lx.%lx.%lx), refcnt = %d\n",
473 cp->c_fid.Volume, cp->c_fid.Vnode,
474 cp->c_fid.Unique, CTOV(cp)->v_usecount)); )
477 if (rw == UIO_READ) {
478 error = VOP_READ(cfvp, uiop, ioflag, cred);
480 error = VOP_WRITE(cfvp, uiop, ioflag, cred);
481 /* ufs_write updates the vnode_pager_setsize for the vnode/object */
485 if (VOP_GETATTR(cfvp, &attr, td) == 0) {
486 vnode_pager_setsize(vp, attr.va_size);
492 MARK_INT_FAIL(CODA_RDWR_STATS);
494 MARK_INT_SAT(CODA_RDWR_STATS);
496 /* Do an internal close if necessary. */
497 if (opened_internally) {
498 MARK_INT_GEN(CODA_CLOSE_STATS);
499 VOP_CLOSE(vp, (rw == UIO_READ ? FREAD : FWRITE), td);
502 /* Invalidate cached attributes if writing. */
504 cp->c_flags &= ~C_VATTR;
512 struct vop_ioctl_args *ap = v;
513 struct vnode *vp = ap->a_vp;
514 int com = ap->a_command;
515 caddr_t data = ap->a_data;
516 int flag = ap->a_fflag;
517 struct ucred *cred = ap->a_cred;
518 struct thread *td = ap->a_td;
522 struct nlookupdata nd;
523 struct PioctlData *iap = (struct PioctlData *)data;
525 MARK_ENTRY(CODA_IOCTL_STATS);
527 CODADEBUG(CODA_IOCTL, myprintf(("in coda_ioctl on %s\n", iap->path));)
529 /* Don't check for operation on a dying object, for ctlvp it
532 /* Must be control object to succeed. */
533 if (!IS_CTL_VP(vp)) {
534 MARK_INT_FAIL(CODA_IOCTL_STATS);
535 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: vp != ctlvp"));)
538 /* Look up the pathname. */
540 /* Should we use the name cache here? It would get it from
541 lookupname sooner or later anyway, right? */
544 error = nlookup_init(&nd, iap->path, UIO_USERSPACE,
545 (iap->follow ? NLC_FOLLOW : 0));
547 error = nlookup(&nd);
549 error = cache_vref(nd.nl_ncp, nd.nl_cred, &tvp);
553 MARK_INT_FAIL(CODA_IOCTL_STATS);
554 CODADEBUG(CODA_IOCTL, myprintf(("coda_ioctl error: lookup returns %d\n",
560 * Make sure this is a coda style cnode, but it may be a
563 if (tvp->v_tag != VT_CODA) {
565 MARK_INT_FAIL(CODA_IOCTL_STATS);
566 CODADEBUG(CODA_IOCTL,
567 myprintf(("coda_ioctl error: %s not a coda object\n",
572 if (iap->vi.in_size > VC_MAXDATASIZE) {
576 error = venus_ioctl(vtomi(tvp), &((VTOC(tvp))->c_fid), com, flag, data, cred, td);
579 MARK_INT_FAIL(CODA_IOCTL_STATS);
581 CODADEBUG(CODA_IOCTL, myprintf(("Ioctl returns %d \n", error)); )
588 * To reduce the cost of a user-level venus;we cache attributes in
589 * the kernel. Each cnode has storage allocated for an attribute. If
590 * c_vattr is valid, return a reference to it. Otherwise, get the
591 * attributes from venus and store them in the cnode. There is some
592 * question if this method is a security leak. But I think that in
593 * order to make this call, the user must have done a lookup and
594 * opened the file, and therefore should already have access.
597 coda_getattr(void *v)
600 struct vop_getattr_args *ap = v;
601 struct vnode *vp = ap->a_vp;
602 struct cnode *cp = VTOC(vp);
603 struct vattr *vap = ap->a_vap;
604 struct thread *td = ap->a_td;
608 MARK_ENTRY(CODA_GETATTR_STATS);
610 if (IS_UNMOUNTING(cp))
613 /* Check for getattr of control object. */
615 MARK_INT_FAIL(CODA_GETATTR_STATS);
619 /* Check to see if the attributes have already been cached */
620 if (VALID_VATTR(cp)) {
621 CODADEBUG(CODA_GETATTR, { myprintf(("attr cache hit: (%lx.%lx.%lx)\n",
624 cp->c_fid.Unique));});
625 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR))
626 print_vattr(&cp->c_vattr); );
629 MARK_INT_SAT(CODA_GETATTR_STATS);
633 error = venus_getattr(vtomi(vp), &cp->c_fid, proc0.p_ucred, td, vap);
636 CODADEBUG(CODA_GETATTR, myprintf(("getattr miss (%lx.%lx.%lx): result %d\n",
642 CODADEBUG(CODA_GETATTR, if (!(codadebug & ~CODA_GETATTR))
645 { int size = vap->va_size;
646 struct vnode *convp = cp->c_ovp;
647 if (convp != (struct vnode *)0) {
648 vnode_pager_setsize(convp, size);
651 /* If not open for write, store attributes in cnode */
652 if ((cp->c_owrite == 0) && (coda_attr_cache)) {
654 cp->c_flags |= C_VATTR;
662 coda_setattr(void *v)
665 struct vop_setattr_args *ap = v;
666 struct vnode *vp = ap->a_vp;
667 struct cnode *cp = VTOC(vp);
668 struct vattr *vap = ap->a_vap;
669 struct ucred *cred = ap->a_cred;
670 struct thread *td = ap->a_td;
674 MARK_ENTRY(CODA_SETATTR_STATS);
676 /* Check for setattr of control object. */
678 MARK_INT_FAIL(CODA_SETATTR_STATS);
682 if (codadebug & CODADBGMSK(CODA_SETATTR)) {
685 error = venus_setattr(vtomi(vp), &cp->c_fid, vap, cred, td);
688 cp->c_flags &= ~C_VATTR;
690 { int size = vap->va_size;
691 struct vnode *convp = cp->c_ovp;
692 if (size != VNOVAL && convp != (struct vnode *)0) {
693 vnode_pager_setsize(convp, size);
696 CODADEBUG(CODA_SETATTR, myprintf(("setattr %d\n", error)); )
704 struct vop_access_args *ap = v;
705 struct vnode *vp = ap->a_vp;
706 struct cnode *cp = VTOC(vp);
707 int mode = ap->a_mode;
708 struct ucred *cred = ap->a_cred;
709 struct thread *td = ap->a_td;
713 MARK_ENTRY(CODA_ACCESS_STATS);
715 /* Check for access of control object. Only read access is
718 /* bogus hack - all will be marked as successes */
719 MARK_INT_SAT(CODA_ACCESS_STATS);
720 return(((mode & VREAD) && !(mode & (VWRITE | VEXEC)))
725 * if the file is a directory, and we are checking exec (eg lookup)
726 * access, and the file is in the namecache, then the user must have
727 * lookup access to it.
729 if (coda_access_cache) {
730 if ((vp->v_type == VDIR) && (mode & VEXEC)) {
731 if (coda_nc_lookup(cp, ".", 1, cred)) {
732 MARK_INT_SAT(CODA_ACCESS_STATS);
733 return(0); /* it was in the cache */
738 error = venus_access(vtomi(vp), &cp->c_fid, mode, cred, td);
744 coda_readlink(void *v)
747 struct vop_readlink_args *ap = v;
748 struct vnode *vp = ap->a_vp;
749 struct cnode *cp = VTOC(vp);
750 struct uio *uiop = ap->a_uio;
751 struct ucred *cred = ap->a_cred;
752 struct thread *td = ap->a_uio->uio_td;
758 MARK_ENTRY(CODA_READLINK_STATS);
760 /* Check for readlink of control object. */
762 MARK_INT_FAIL(CODA_READLINK_STATS);
766 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) { /* symlink was cached */
767 uiop->uio_rw = UIO_READ;
768 error = uiomove(cp->c_symlink, (int)cp->c_symlen, uiop);
770 MARK_INT_FAIL(CODA_READLINK_STATS);
772 MARK_INT_SAT(CODA_READLINK_STATS);
776 error = venus_readlink(vtomi(vp), &cp->c_fid, cred, td, &str, &len);
779 uiop->uio_rw = UIO_READ;
780 error = uiomove(str, len, uiop);
782 if (coda_symlink_cache) {
785 cp->c_flags |= C_SYMLINK;
790 CODADEBUG(CODA_READLINK, myprintf(("in readlink result %d\n",error));)
798 struct vop_fsync_args *ap = v;
799 struct vnode *vp = ap->a_vp;
800 struct cnode *cp = VTOC(vp);
801 struct thread *td = ap->a_td;
803 struct vnode *convp = cp->c_ovp;
806 MARK_ENTRY(CODA_FSYNC_STATS);
808 /* Check for fsync on an unmounting object */
809 /* The NetBSD kernel, in it's infinite wisdom, can try to fsync
810 * after an unmount has been initiated. This is a Bad Thing,
811 * which we have to avoid. Not a legitimate failure for stats.
813 if (IS_UNMOUNTING(cp)) {
817 /* Check for fsync of control object. */
819 MARK_INT_SAT(CODA_FSYNC_STATS);
824 VOP_FSYNC(convp, MNT_WAIT, td);
827 * We see fsyncs with usecount == 1 then usecount == 0.
828 * For now we ignore them.
831 if (!vp->v_usecount) {
832 printf("coda_fsync on vnode %p with %d usecount. c_flags = %x (%x)\n",
833 vp, vp->v_usecount, cp->c_flags, cp->c_flags&C_PURGING);
838 * We can expect fsync on any vnode at all if venus is pruging it.
839 * Venus can't very well answer the fsync request, now can it?
840 * Hopefully, it won't have to, because hopefully, venus preserves
841 * the (possibly untrue) invariant that it never purges an open
844 if (cp->c_flags & C_PURGING) {
850 error = venus_fsync(vtomi(vp), &cp->c_fid, proc0.p_ucred, td);
852 CODADEBUG(CODA_FSYNC, myprintf(("in fsync result %d\n",error)); );
857 coda_inactive(void *v)
859 /* XXX - at the moment, inactive doesn't look at cred, and doesn't
860 have a proc pointer. Oops. */
862 struct vop_inactive_args *ap = v;
863 struct vnode *vp = ap->a_vp;
864 struct cnode *cp = VTOC(vp);
865 struct ucred *cred __attribute__((unused)) = NULL;
866 /*struct thread *td = curthread;*/
870 /* We don't need to send inactive to venus - DCS */
871 MARK_ENTRY(CODA_INACTIVE_STATS);
874 MARK_INT_SAT(CODA_INACTIVE_STATS);
878 CODADEBUG(CODA_INACTIVE, myprintf(("in inactive, %lx.%lx.%lx. vfsp %p\n",
879 cp->c_fid.Volume, cp->c_fid.Vnode,
880 cp->c_fid.Unique, vp->v_mount));)
882 /* If an array has been allocated to hold the symlink, deallocate it */
883 if ((coda_symlink_cache) && (VALID_SYMLINK(cp))) {
884 if (cp->c_symlink == NULL)
885 panic("coda_inactive: null symlink pointer in cnode");
887 CODA_FREE(cp->c_symlink, cp->c_symlen);
888 cp->c_flags &= ~C_SYMLINK;
892 /* Remove it from the table so it can't be found. */
894 if ((struct coda_mntinfo *)(vp->v_mount->mnt_data) == NULL) {
895 myprintf(("Help! vfsp->vfs_data was NULL, but vnode %p wasn't dying\n", vp));
896 panic("badness in coda_inactive\n");
899 if (IS_UNMOUNTING(cp)) {
901 printf("coda_inactive: IS_UNMOUNTING use %d: vp %p, cp %p\n", vp->v_usecount, vp, cp);
902 if (cp->c_ovp != NULL)
903 printf("coda_inactive: cp->ovp != NULL use %d: vp %p, cp %p\n",
904 vp->v_usecount, vp, cp);
907 #ifdef OLD_DIAGNOSTIC
908 if (CTOV(cp)->v_usecount) {
909 panic("coda_inactive: nonzero reference count");
911 if (cp->c_ovp != NULL) {
912 panic("coda_inactive: cp->ovp != NULL");
918 MARK_INT_SAT(CODA_INACTIVE_STATS);
923 * Remote file system operations having to do with directory manipulation.
927 * It appears that in NetBSD, lookup is supposed to return the vnode locked
933 struct vop_old_lookup_args *ap = v;
934 struct vnode *dvp = ap->a_dvp;
935 struct cnode *dcp = VTOC(dvp);
936 struct vnode **vpp = ap->a_vpp;
938 * It looks as though ap->a_cnp->ni_cnd->cn_nameptr holds the rest
939 * of the string to xlate, and that we must try to get at least
940 * ap->a_cnp->ni_cnd->cn_namelen of those characters to macth. I
943 struct componentname *cnp = ap->a_cnp;
944 struct ucred *cred = cnp->cn_cred;
945 struct thread *td = cnp->cn_td;
948 const char *nm = cnp->cn_nameptr;
949 int len = cnp->cn_namelen;
954 MARK_ENTRY(CODA_LOOKUP_STATS);
956 CODADEBUG(CODA_LOOKUP, myprintf(("lookup: %s in %lx.%lx.%lx\n",
957 nm, dcp->c_fid.Volume,
958 dcp->c_fid.Vnode, dcp->c_fid.Unique)););
960 /* Check for lookup of control object. */
961 if (IS_CTL_NAME(dvp, nm, len)) {
964 MARK_INT_SAT(CODA_LOOKUP_STATS);
968 if (len+1 > CODA_MAXNAMLEN) {
969 MARK_INT_FAIL(CODA_LOOKUP_STATS);
970 CODADEBUG(CODA_LOOKUP, myprintf(("name too long: lookup, %lx.%lx.%lx(%s)\n",
971 dcp->c_fid.Volume, dcp->c_fid.Vnode,
972 dcp->c_fid.Unique, nm)););
973 *vpp = (struct vnode *)0;
977 /* First try to look the file up in the cfs name cache */
978 /* lock the parent vnode? */
979 cp = coda_nc_lookup(dcp, nm, len, cred);
983 CODADEBUG(CODA_LOOKUP,
984 myprintf(("lookup result %d vpp %p\n",error,*vpp));)
987 /* The name wasn't cached, so we need to contact Venus */
988 error = venus_lookup(vtomi(dvp), &dcp->c_fid, nm, len, cred, td, &VFid, &vtype);
991 MARK_INT_FAIL(CODA_LOOKUP_STATS);
992 CODADEBUG(CODA_LOOKUP, myprintf(("lookup error on %lx.%lx.%lx(%s)%d\n",
993 dcp->c_fid.Volume, dcp->c_fid.Vnode, dcp->c_fid.Unique, nm, error));)
994 *vpp = (struct vnode *)0;
996 MARK_INT_SAT(CODA_LOOKUP_STATS);
997 CODADEBUG(CODA_LOOKUP,
998 myprintf(("lookup: vol %lx vno %lx uni %lx type %o result %d\n",
999 VFid.Volume, VFid.Vnode, VFid.Unique, vtype,
1002 cp = make_coda_node(&VFid, dvp->v_mount, vtype);
1005 /* enter the new vnode in the Name Cache only if the top bit isn't set */
1006 /* And don't enter a new vnode for an invalid one! */
1007 if (!(vtype & CODA_NOCACHE))
1008 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1014 * If we are creating, and this was the last name to be looked up,
1015 * and the error was ENOENT, then there really shouldn't be an
1016 * error and we can make the leaf NULL and return success. Since
1017 * this is supposed to work under Mach as well as NetBSD, we're
1018 * leaving this fn wrapped. We also must tell lookup/namei that
1019 * we need to save the last component of the name. (Create will
1020 * have to free the name buffer later...lucky us...)
1022 if ((cnp->cn_nameiop == NAMEI_CREATE || cnp->cn_nameiop == NAMEI_RENAME)
1025 error = EJUSTRETURN;
1030 * If the lookup went well, we need to (potentially?) unlock the
1031 * parent, and lock the child. We are only responsible for
1032 * checking to see if the parent is supposed to be unlocked before
1033 * we return. We must always lock the child (provided there is
1034 * one, and (the parent isn't locked or it isn't the same as the
1035 * parent.) Simple, huh? We can never leave the parent locked unless
1038 if (!error || (error == EJUSTRETURN)) {
1039 if ((cnp->cn_flags & CNP_LOCKPARENT) == 0) {
1040 if ((error = VOP_UNLOCK(dvp, 0, td))) {
1044 * The parent is unlocked. As long as there is a child,
1045 * lock it without bothering to check anything else.
1048 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1049 printf("coda_lookup: ");
1050 panic("unlocked parent but couldn't lock child");
1054 /* The parent is locked, and may be the same as the child */
1055 if (*ap->a_vpp && (*ap->a_vpp != dvp)) {
1056 /* Different, go ahead and lock it. */
1057 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1058 printf("coda_lookup: ");
1059 panic("unlocked parent but couldn't lock child");
1064 /* If the lookup failed, we need to ensure that the leaf is NULL */
1065 /* Don't change any locking? */
1073 coda_create(void *v)
1076 struct vop_old_create_args *ap = v;
1077 struct vnode *dvp = ap->a_dvp;
1078 struct cnode *dcp = VTOC(dvp);
1079 struct vattr *va = ap->a_vap;
1081 int mode = ap->a_vap->va_mode;
1082 struct vnode **vpp = ap->a_vpp;
1083 struct componentname *cnp = ap->a_cnp;
1084 struct ucred *cred = cnp->cn_cred;
1085 struct thread *td = cnp->cn_td;
1089 const char *nm = cnp->cn_nameptr;
1090 int len = cnp->cn_namelen;
1094 MARK_ENTRY(CODA_CREATE_STATS);
1096 /* All creates are exclusive XXX */
1097 /* I'm assuming the 'mode' argument is the file mode bits XXX */
1099 /* Check for create of control object. */
1100 if (IS_CTL_NAME(dvp, nm, len)) {
1101 *vpp = (struct vnode *)0;
1102 MARK_INT_FAIL(CODA_CREATE_STATS);
1106 error = venus_create(vtomi(dvp), &dcp->c_fid, nm, len, exclusive, mode, va, cred, td, &VFid, &attr);
1110 /* If this is an exclusive create, panic if the file already exists. */
1111 /* Venus should have detected the file and reported EEXIST. */
1113 if ((exclusive == 1) &&
1114 (coda_find(&VFid) != NULL))
1115 panic("cnode existed for newly created file!");
1117 cp = make_coda_node(&VFid, dvp->v_mount, attr.va_type);
1120 /* Update va to reflect the new attributes. */
1123 /* Update the attribute cache and mark it as valid */
1124 if (coda_attr_cache) {
1125 VTOC(*vpp)->c_vattr = attr;
1126 VTOC(*vpp)->c_flags |= C_VATTR;
1129 /* Invalidate the parent's attr cache, the modification time has changed */
1130 VTOC(dvp)->c_flags &= ~C_VATTR;
1132 /* enter the new vnode in the Name Cache */
1133 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1135 CODADEBUG(CODA_CREATE,
1136 myprintf(("create: (%lx.%lx.%lx), result %d\n",
1137 VFid.Volume, VFid.Vnode, VFid.Unique, error)); )
1139 *vpp = (struct vnode *)0;
1140 CODADEBUG(CODA_CREATE, myprintf(("create error %d\n", error));)
1144 if ((error = VOP_LOCK(*ap->a_vpp, LK_EXCLUSIVE, td))) {
1145 printf("coda_create: ");
1146 panic("unlocked parent but couldn't lock child");
1153 coda_remove(void *v)
1156 struct vop_old_remove_args *ap = v;
1157 struct vnode *dvp = ap->a_dvp;
1158 struct cnode *cp = VTOC(dvp);
1159 struct componentname *cnp = ap->a_cnp;
1160 struct ucred *cred = cnp->cn_cred;
1161 struct thread *td = cnp->cn_td;
1164 const char *nm = cnp->cn_nameptr;
1165 int len = cnp->cn_namelen;
1168 MARK_ENTRY(CODA_REMOVE_STATS);
1170 CODADEBUG(CODA_REMOVE, myprintf(("remove: %s in %lx.%lx.%lx\n",
1171 nm, cp->c_fid.Volume, cp->c_fid.Vnode,
1172 cp->c_fid.Unique)););
1174 /* Remove the file's entry from the CODA Name Cache */
1175 /* We're being conservative here, it might be that this person
1176 * doesn't really have sufficient access to delete the file
1177 * but we feel zapping the entry won't really hurt anyone -- dcs
1179 /* I'm gonna go out on a limb here. If a file and a hardlink to it
1180 * exist, and one is removed, the link count on the other will be
1181 * off by 1. We could either invalidate the attrs if cached, or
1182 * fix them. I'll try to fix them. DCS 11/8/94
1184 tp = coda_nc_lookup(VTOC(dvp), nm, len, cred);
1186 if (VALID_VATTR(tp)) { /* If attrs are cached */
1187 if (tp->c_vattr.va_nlink > 1) { /* If it's a hard link */
1188 tp->c_vattr.va_nlink--;
1192 coda_nc_zapfile(VTOC(dvp), nm, len);
1193 /* No need to flush it if it doesn't exist! */
1195 /* Invalidate the parent's attr cache, the modification time has changed */
1196 VTOC(dvp)->c_flags &= ~C_VATTR;
1198 /* Check for remove of control object. */
1199 if (IS_CTL_NAME(dvp, nm, len)) {
1200 MARK_INT_FAIL(CODA_REMOVE_STATS);
1204 error = venus_remove(vtomi(dvp), &cp->c_fid, nm, len, cred, td);
1206 CODADEBUG(CODA_REMOVE, myprintf(("in remove result %d\n",error)); )
1215 struct vop_old_link_args *ap = v;
1216 struct vnode *vp = ap->a_vp;
1217 struct cnode *cp = VTOC(vp);
1218 struct vnode *tdvp = ap->a_tdvp;
1219 struct cnode *tdcp = VTOC(tdvp);
1220 struct componentname *cnp = ap->a_cnp;
1221 struct ucred *cred = cnp->cn_cred;
1222 struct thread *td = cnp->cn_td;
1225 const char *nm = cnp->cn_nameptr;
1226 int len = cnp->cn_namelen;
1228 MARK_ENTRY(CODA_LINK_STATS);
1230 if (codadebug & CODADBGMSK(CODA_LINK)) {
1232 myprintf(("nb_link: vp fid: (%lx.%lx.%lx)\n",
1233 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1234 myprintf(("nb_link: tdvp fid: (%lx.%lx.%lx)\n",
1235 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique));
1238 if (codadebug & CODADBGMSK(CODA_LINK)) {
1239 myprintf(("link: vp fid: (%lx.%lx.%lx)\n",
1240 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1241 myprintf(("link: tdvp fid: (%lx.%lx.%lx)\n",
1242 tdcp->c_fid.Volume, tdcp->c_fid.Vnode, tdcp->c_fid.Unique));
1246 /* Check for link to/from control object. */
1247 if (IS_CTL_NAME(tdvp, nm, len) || IS_CTL_VP(vp)) {
1248 MARK_INT_FAIL(CODA_LINK_STATS);
1252 error = venus_link(vtomi(vp), &cp->c_fid, &tdcp->c_fid, nm, len, cred, td);
1254 /* Invalidate the parent's attr cache, the modification time has changed */
1255 VTOC(tdvp)->c_flags &= ~C_VATTR;
1256 VTOC(vp)->c_flags &= ~C_VATTR;
1258 CODADEBUG(CODA_LINK, myprintf(("in link result %d\n",error)); )
1264 coda_rename(void *v)
1267 struct vop_old_rename_args *ap = v;
1268 struct vnode *odvp = ap->a_fdvp;
1269 struct cnode *odcp = VTOC(odvp);
1270 struct componentname *fcnp = ap->a_fcnp;
1271 struct vnode *ndvp = ap->a_tdvp;
1272 struct cnode *ndcp = VTOC(ndvp);
1273 struct componentname *tcnp = ap->a_tcnp;
1274 struct ucred *cred = fcnp->cn_cred;
1275 struct thread *td = fcnp->cn_td;
1278 const char *fnm = fcnp->cn_nameptr;
1279 int flen = fcnp->cn_namelen;
1280 const char *tnm = tcnp->cn_nameptr;
1281 int tlen = tcnp->cn_namelen;
1283 MARK_ENTRY(CODA_RENAME_STATS);
1285 /* Hmmm. The vnodes are already looked up. Perhaps they are locked?
1286 This could be Bad. XXX */
1287 #ifdef OLD_DIAGNOSTIC
1288 if ((fcnp->cn_cred != tcnp->cn_cred) || (fcnp->cn_td != tcnp->cn_td))
1290 panic("coda_rename: component names don't agree");
1294 /* Check for rename involving control object. */
1295 if (IS_CTL_NAME(odvp, fnm, flen) || IS_CTL_NAME(ndvp, tnm, tlen)) {
1296 MARK_INT_FAIL(CODA_RENAME_STATS);
1300 /* Problem with moving directories -- need to flush entry for .. */
1302 struct cnode *ovcp = coda_nc_lookup(VTOC(odvp), fnm, flen, cred);
1304 struct vnode *ovp = CTOV(ovcp);
1306 (ovp->v_type == VDIR)) /* If it's a directory */
1307 coda_nc_zapfile(VTOC(ovp),"..", 2);
1311 /* Remove the entries for both source and target files */
1312 coda_nc_zapfile(VTOC(odvp), fnm, flen);
1313 coda_nc_zapfile(VTOC(ndvp), tnm, tlen);
1315 /* Invalidate the parent's attr cache, the modification time has changed */
1316 VTOC(odvp)->c_flags &= ~C_VATTR;
1317 VTOC(ndvp)->c_flags &= ~C_VATTR;
1319 if (flen+1 > CODA_MAXNAMLEN) {
1320 MARK_INT_FAIL(CODA_RENAME_STATS);
1325 if (tlen+1 > CODA_MAXNAMLEN) {
1326 MARK_INT_FAIL(CODA_RENAME_STATS);
1331 error = venus_rename(vtomi(odvp), &odcp->c_fid, &ndcp->c_fid, fnm, flen, tnm, tlen, cred, td);
1334 CODADEBUG(CODA_RENAME, myprintf(("in rename result %d\n",error));)
1336 /* It seems to be incumbent on us to drop locks on all four vnodes */
1337 /* From-vnodes are not locked, only ref'd. To-vnodes are locked. */
1343 if (ap->a_tvp == ndvp) {
1358 struct vop_old_mkdir_args *ap = v;
1359 struct vnode *dvp = ap->a_dvp;
1360 struct cnode *dcp = VTOC(dvp);
1361 struct componentname *cnp = ap->a_cnp;
1362 struct vattr *va = ap->a_vap;
1363 struct vnode **vpp = ap->a_vpp;
1364 struct ucred *cred = cnp->cn_cred;
1365 struct thread *td = cnp->cn_td;
1368 const char *nm = cnp->cn_nameptr;
1369 int len = cnp->cn_namelen;
1374 MARK_ENTRY(CODA_MKDIR_STATS);
1376 /* Check for mkdir of target object. */
1377 if (IS_CTL_NAME(dvp, nm, len)) {
1378 *vpp = (struct vnode *)0;
1379 MARK_INT_FAIL(CODA_MKDIR_STATS);
1383 if (len+1 > CODA_MAXNAMLEN) {
1384 *vpp = (struct vnode *)0;
1385 MARK_INT_FAIL(CODA_MKDIR_STATS);
1389 error = venus_mkdir(vtomi(dvp), &dcp->c_fid, nm, len, va, cred, td, &VFid, &ova);
1392 if (coda_find(&VFid) != NULL)
1393 panic("cnode existed for newly created directory!");
1396 cp = make_coda_node(&VFid, dvp->v_mount, va->va_type);
1399 /* enter the new vnode in the Name Cache */
1400 coda_nc_enter(VTOC(dvp), nm, len, cred, VTOC(*vpp));
1402 /* as a side effect, enter "." and ".." for the directory */
1403 coda_nc_enter(VTOC(*vpp), ".", 1, cred, VTOC(*vpp));
1404 coda_nc_enter(VTOC(*vpp), "..", 2, cred, VTOC(dvp));
1406 if (coda_attr_cache) {
1407 VTOC(*vpp)->c_vattr = ova; /* update the attr cache */
1408 VTOC(*vpp)->c_flags |= C_VATTR; /* Valid attributes in cnode */
1411 /* Invalidate the parent's attr cache, the modification time has changed */
1412 VTOC(dvp)->c_flags &= ~C_VATTR;
1414 CODADEBUG( CODA_MKDIR, myprintf(("mkdir: (%lx.%lx.%lx) result %d\n",
1415 VFid.Volume, VFid.Vnode, VFid.Unique, error)); )
1417 *vpp = (struct vnode *)0;
1418 CODADEBUG(CODA_MKDIR, myprintf(("mkdir error %d\n",error));)
1428 struct vop_old_rmdir_args *ap = v;
1429 struct vnode *dvp = ap->a_dvp;
1430 struct cnode *dcp = VTOC(dvp);
1431 struct componentname *cnp = ap->a_cnp;
1432 struct ucred *cred = cnp->cn_cred;
1433 struct thread *td = cnp->cn_td;
1436 const char *nm = cnp->cn_nameptr;
1437 int len = cnp->cn_namelen;
1440 MARK_ENTRY(CODA_RMDIR_STATS);
1442 /* Check for rmdir of control object. */
1443 if (IS_CTL_NAME(dvp, nm, len)) {
1444 MARK_INT_FAIL(CODA_RMDIR_STATS);
1448 /* We're being conservative here, it might be that this person
1449 * doesn't really have sufficient access to delete the file
1450 * but we feel zapping the entry won't really hurt anyone -- dcs
1453 * As a side effect of the rmdir, remove any entries for children of
1454 * the directory, especially "." and "..".
1456 cp = coda_nc_lookup(dcp, nm, len, cred);
1457 if (cp) coda_nc_zapParentfid(&(cp->c_fid), NOT_DOWNCALL);
1459 /* Remove the file's entry from the CODA Name Cache */
1460 coda_nc_zapfile(dcp, nm, len);
1462 /* Invalidate the parent's attr cache, the modification time has changed */
1463 dcp->c_flags &= ~C_VATTR;
1465 error = venus_rmdir(vtomi(dvp), &dcp->c_fid, nm, len, cred, td);
1467 CODADEBUG(CODA_RMDIR, myprintf(("in rmdir result %d\n", error)); )
1473 coda_symlink(void *v)
1476 struct vop_old_symlink_args *ap = v;
1477 struct vnode *tdvp = ap->a_dvp;
1478 struct cnode *tdcp = VTOC(tdvp);
1479 struct componentname *cnp = ap->a_cnp;
1480 struct vattr *tva = ap->a_vap;
1481 char *path = ap->a_target;
1482 struct ucred *cred = cnp->cn_cred;
1483 struct thread *td = cnp->cn_td;
1484 struct vnode **vpp = ap->a_vpp;
1488 * XXX I'm assuming the following things about coda_symlink's
1490 * t(foo) is the new name/parent/etc being created.
1491 * lname is the contents of the new symlink.
1493 char *nm = cnp->cn_nameptr;
1494 int len = cnp->cn_namelen;
1495 int plen = strlen(path);
1498 * Here's the strategy for the moment: perform the symlink, then
1499 * do a lookup to grab the resulting vnode. I know this requires
1500 * two communications with Venus for a new sybolic link, but
1501 * that's the way the ball bounces. I don't yet want to change
1502 * the way the Mach symlink works. When Mach support is
1503 * deprecated, we should change symlink so that the common case
1504 * returns the resultant vnode in a vpp argument.
1507 MARK_ENTRY(CODA_SYMLINK_STATS);
1509 /* Check for symlink of control object. */
1510 if (IS_CTL_NAME(tdvp, nm, len)) {
1511 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1515 if (plen+1 > CODA_MAXPATHLEN) {
1516 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1520 if (len+1 > CODA_MAXNAMLEN) {
1521 MARK_INT_FAIL(CODA_SYMLINK_STATS);
1526 error = venus_symlink(vtomi(tdvp), &tdcp->c_fid, path, plen, nm, len, tva, cred, td);
1528 /* Invalidate the parent's attr cache, the modification time has changed */
1529 tdcp->c_flags &= ~C_VATTR;
1532 error = VOP_OLD_LOOKUP(tdvp, vpp, cnp);
1535 CODADEBUG(CODA_SYMLINK, myprintf(("in symlink result %d\n",error)); )
1540 * Read directory entries.
1543 coda_readdir(void *v)
1546 struct vop_readdir_args *ap = v;
1547 struct vnode *vp = ap->a_vp;
1548 struct cnode *cp = VTOC(vp);
1549 struct uio *uiop = ap->a_uio;
1550 struct ucred *cred = ap->a_cred;
1551 int *eofflag = ap->a_eofflag;
1552 u_long **cookies = ap->a_cookies;
1553 int *ncookies = ap->a_ncookies;
1554 struct thread *td = ap->a_uio->uio_td;
1559 MARK_ENTRY(CODA_READDIR_STATS);
1561 CODADEBUG(CODA_READDIR, myprintf(("coda_readdir(%p, %d, %lld, %d)\n",
1562 (void *)uiop->uio_iov->iov_base,
1564 (long long)uiop->uio_offset,
1565 uiop->uio_segflg)); )
1567 /* Check for readdir of control object. */
1568 if (IS_CTL_VP(vp)) {
1569 MARK_INT_FAIL(CODA_READDIR_STATS);
1574 /* If directory is not already open do an "internal open" on it. */
1575 int opened_internally = 0;
1576 if (cp->c_ovp == NULL) {
1577 opened_internally = 1;
1578 MARK_INT_GEN(CODA_OPEN_STATS);
1579 error = VOP_OPEN(vp, FREAD, cred, NULL, td);
1580 printf("coda_readdir: Internally Opening %p\n", vp);
1582 printf("coda_readdir: VOP_OPEN on container failed %d\n", error);
1585 if (vp->v_type == VREG) {
1586 if (vp->v_object == NULL) {
1588 printf("coda_readdir: vnode %p has no VM object!\n", vp);
1592 if (error) return(error);
1595 /* Have UFS handle the call. */
1596 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)); )
1597 error = VOP_READDIR(cp->c_ovp, uiop, cred, eofflag, ncookies,
1601 MARK_INT_FAIL(CODA_READDIR_STATS);
1603 MARK_INT_SAT(CODA_READDIR_STATS);
1605 /* Do an "internal close" if necessary. */
1606 if (opened_internally) {
1607 MARK_INT_GEN(CODA_CLOSE_STATS);
1608 VOP_CLOSE(vp, FREAD, td);
1616 * Convert from file system blocks to device blocks
1621 /* XXX on the global proc */
1622 struct vop_bmap_args *ap = v;
1626 cp = VTOC(ap->a_vp);
1630 ret = VOP_BMAP(cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb);
1631 printf("VOP_BMAP(cp->c_ovp %p, bn %p, vpp %p, bnp %p, ap->a_runp %p, ap->a_runb %p) = %d\n",
1632 cp->c_ovp, bn, vpp, bnp, ap->a_runp, ap->a_runb, ret);
1637 printf("coda_bmap: no container\n");
1644 * I don't think the following two things are used anywhere, so I've
1645 * commented them out
1647 * struct buf *async_bufhead;
1648 * int async_daemon_count;
1651 coda_strategy(struct vop_strategy_args *ap __unused)
1653 printf("coda_strategy: called ???\n");
1658 coda_reclaim(void *v)
1661 struct vop_reclaim_args *ap = v;
1662 struct vnode *vp = ap->a_vp;
1663 struct cnode *cp = VTOC(vp);
1668 * Forced unmount/flush will let vnodes with non zero use be destroyed!
1672 if (IS_UNMOUNTING(cp)) {
1674 if (VTOC(vp)->c_ovp) {
1675 if (IS_UNMOUNTING(cp))
1676 printf("coda_reclaim: c_ovp not void: vp %p, cp %p\n", vp, cp);
1680 #ifdef OLD_DIAGNOSTIC
1681 if (vp->v_usecount != 0)
1682 print("coda_reclaim: pushing active %p\n", vp);
1683 if (VTOC(vp)->c_ovp) {
1684 panic("coda_reclaim: c_ovp not void");
1688 coda_free(VTOC(vp));
1697 struct vop_lock_args *ap = v;
1698 struct vnode *vp = ap->a_vp;
1699 struct cnode *cp = VTOC(vp);
1700 struct thread *td = ap->a_td;
1706 if (coda_lockdebug) {
1707 myprintf(("Attempting lock on %lx.%lx.%lx\n",
1708 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1712 return (lockmgr(&vp->v_lock, ap->a_flags, td));
1714 return (debuglockmgr(&vp->v_lock, ap->a_flags, td,
1715 "coda_lock", vp->filename, vp->line));
1720 coda_unlock(void *v)
1723 struct vop_unlock_args *ap = v;
1724 struct vnode *vp = ap->a_vp;
1725 struct cnode *cp = VTOC(vp);
1726 struct thread *td = ap->a_td;
1731 if (coda_lockdebug) {
1732 myprintf(("Attempting unlock on %lx.%lx.%lx\n",
1733 cp->c_fid.Volume, cp->c_fid.Vnode, cp->c_fid.Unique));
1736 return (lockmgr(&vp->v_lock, ap->a_flags | LK_RELEASE, td));
1740 coda_islocked(void *v)
1743 struct vop_islocked_args *ap = v;
1746 return (lockstatus(&ap->a_vp->v_lock, ap->a_td));
1749 /* How one looks up a vnode given a device/inode pair: */
1751 coda_grab_vnode(dev_t dev, ino_t ino, struct vnode **vpp)
1753 /* This is like VFS_VGET() or igetinode()! */
1757 if (!(mp = devtomp(dev))) {
1758 myprintf(("coda_grab_vnode: devtomp(%#lx) returns NULL\n",
1759 (u_long)dev2udev(dev)));
1763 /* XXX - ensure that nonzero-return means failure */
1764 error = VFS_VGET(mp,ino,vpp);
1766 myprintf(("coda_grab_vnode: iget/vget(%lx, %lu) returns %p, err %d\n",
1767 (u_long)dev2udev(dev), (u_long)ino, (void *)*vpp, error));
1774 print_vattr(struct vattr *attr)
1778 switch (attr->va_type) {
1812 myprintf(("attr: type %s mode %d uid %d gid %d fsid %d rdev %d\n",
1813 typestr, (int)attr->va_mode, (int)attr->va_uid,
1814 (int)attr->va_gid, (int)attr->va_fsid, (int)attr->va_rdev));
1816 myprintf((" fileid %d nlink %d size %d blocksize %d bytes %d\n",
1817 (int)attr->va_fileid, (int)attr->va_nlink,
1819 (int)attr->va_blocksize,(int)attr->va_bytes));
1820 myprintf((" gen %ld flags %ld vaflags %d\n",
1821 attr->va_gen, attr->va_flags, attr->va_vaflags));
1822 myprintf((" atime sec %d nsec %d\n",
1823 (int)attr->va_atime.tv_sec, (int)attr->va_atime.tv_nsec));
1824 myprintf((" mtime sec %d nsec %d\n",
1825 (int)attr->va_mtime.tv_sec, (int)attr->va_mtime.tv_nsec));
1826 myprintf((" ctime sec %d nsec %d\n",
1827 (int)attr->va_ctime.tv_sec, (int)attr->va_ctime.tv_nsec));
1830 /* How to print a ucred */
1832 print_cred(struct ucred *cred)
1837 myprintf(("ref %d\tuid %d\n",cred->cr_ref,cred->cr_uid));
1839 for (i=0; i < cred->cr_ngroups; i++)
1840 myprintf(("\tgroup %d: (%d)\n",i,cred->cr_groups[i]));
1846 * Return a vnode for the given fid.
1847 * If no cnode exists for this fid create one and put it
1848 * in a table hashed by fid.Volume and fid.Vnode. If the cnode for
1849 * this fid is already in the table return it (ref count is
1850 * incremented by coda_find. The cnode will be flushed from the
1851 * table when coda_inactive calls coda_unsave.
1854 make_coda_node(ViceFid *fid, struct mount *vfsp, short type)
1859 if ((cp = coda_find(fid)) == NULL) {
1865 err = getnewvnode(VT_CODA, vfsp, &vp, 0, 0);
1867 panic("coda: getnewvnode returned error %d\n", err);