47
48#include <sys/param.h>
49#include <sys/systm.h>
50#include <sys/conf.h>
51#include <sys/kernel.h>
52#include <sys/lock.h>
53#include <sys/malloc.h>
54#include <sys/mount.h>
55#include <sys/namei.h>
56#include <sys/proc.h>
57
58#include <coda/coda.h>
59#include <coda/cnode.h>
60#include <coda/coda_vfsops.h>
61#include <coda/coda_venus.h>
62#include <coda/coda_subr.h>
63#include <coda/coda_opstats.h>
64
65MALLOC_DEFINE(M_CODA, "CODA storage", "Various Coda Structures");
66
67int codadebug = 0;
68int coda_vfsop_print_entry = 0;
69#define ENTRY if(coda_vfsop_print_entry) myprintf(("Entered %s\n",__func__))
70
71struct vnode *coda_ctlvp;
72struct coda_mntinfo coda_mnttbl[NVCODA]; /* indexed by minor device number */
73
74/* structure to keep statistics of internally generated/satisfied calls */
75
76struct coda_op_stats coda_vfsopstats[CODA_VFSOPS_SIZE];
77
78#define MARK_ENTRY(op) (coda_vfsopstats[op].entries++)
79#define MARK_INT_SAT(op) (coda_vfsopstats[op].sat_intrn++)
80#define MARK_INT_FAIL(op) (coda_vfsopstats[op].unsat_intrn++)
81#define MRAK_INT_GEN(op) (coda_vfsopstats[op].gen_intrn++)
82
83extern int coda_nc_initialized; /* Set if cache has been initialized */
84extern int vc_nb_open(struct cdev *, int, int, struct thread *);
85
86static vfs_omount_t coda_omount;
87
88int
89coda_vfsopstats_init(void)
90{
91 register int i;
92
93 for (i=0;i<CODA_VFSOPS_SIZE;i++) {
94 coda_vfsopstats[i].opcode = i;
95 coda_vfsopstats[i].entries = 0;
96 coda_vfsopstats[i].sat_intrn = 0;
97 coda_vfsopstats[i].unsat_intrn = 0;
98 coda_vfsopstats[i].gen_intrn = 0;
99 }
100
101 return 0;
102}
103
104/*
105 * cfs mount vfsop
106 * Set up mount info record and attach it to vfs struct.
107 */
108/*ARGSUSED*/
109int
110coda_omount(vfsp, path, data, td)
111 struct mount *vfsp; /* Allocated and initialized by mount(2) */
112 char *path; /* path covered: ignored by the fs-layer */
113 caddr_t data; /* Need to define a data type for this in netbsd? */
114 struct thread *td;
115{
116 struct vnode *dvp;
117 struct cnode *cp;
118 struct cdev *dev;
119 struct coda_mntinfo *mi;
120 struct vnode *rootvp;
121 CodaFid rootfid = INVAL_FID;
122 CodaFid ctlfid = CTL_FID;
123 int error;
124 struct nameidata ndp;
125 ENTRY;
126
127 coda_vfsopstats_init();
128 coda_vnodeopstats_init();
129
130 MARK_ENTRY(CODA_MOUNT_STATS);
131 if (CODA_MOUNTED(vfsp)) {
132 MARK_INT_FAIL(CODA_MOUNT_STATS);
133 return(EBUSY);
134 }
135
136 /* Validate mount device. Similar to getmdev(). */
137 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_USERSPACE, data, td);
138 error = namei(&ndp);
139 dvp = ndp.ni_vp;
140
141 if (error) {
142 MARK_INT_FAIL(CODA_MOUNT_STATS);
143 return (error);
144 }
145 if (dvp->v_type != VCHR) {
146 MARK_INT_FAIL(CODA_MOUNT_STATS);
147 vrele(dvp);
148 NDFREE(&ndp, NDF_ONLY_PNBUF);
149 return(ENXIO);
150 }
151 dev = dvp->v_rdev;
152 vrele(dvp);
153 NDFREE(&ndp, NDF_ONLY_PNBUF);
154
155 /*
156 * See if the device table matches our expectations.
157 */
158 if (devsw(dev)->d_open != vc_nb_open)
159 {
160 MARK_INT_FAIL(CODA_MOUNT_STATS);
161 return(ENXIO);
162 }
163
164 if (minor(dev) >= NVCODA || minor(dev) < 0) {
165 MARK_INT_FAIL(CODA_MOUNT_STATS);
166 return(ENXIO);
167 }
168
169 /*
170 * Initialize the mount record and link it to the vfs struct
171 */
172 mi = &coda_mnttbl[minor(dev)];
173
174 if (!VC_OPEN(&mi->mi_vcomm)) {
175 MARK_INT_FAIL(CODA_MOUNT_STATS);
176 return(ENODEV);
177 }
178
179 /* No initialization (here) of mi_vcomm! */
180 vfsp->mnt_data = (qaddr_t)mi;
181 vfs_getnewfsid (vfsp);
182
183 mi->mi_vfsp = vfsp;
184 mi->mi_started = 0; /* XXX See coda_root() */
185
186 /*
187 * Make a root vnode to placate the Vnode interface, but don't
188 * actually make the CODA_ROOT call to venus until the first call
189 * to coda_root in case a server is down while venus is starting.
190 */
191 cp = make_coda_node(&rootfid, vfsp, VDIR);
192 rootvp = CTOV(cp);
193 rootvp->v_vflag |= VV_ROOT;
194
195/* cp = make_coda_node(&ctlfid, vfsp, VCHR);
196 The above code seems to cause a loop in the cnode links.
197 I don't totally understand when it happens, it is caught
198 when closing down the system.
199 */
200 cp = make_coda_node(&ctlfid, 0, VCHR);
201
202 coda_ctlvp = CTOV(cp);
203
204 /* Add vfs and rootvp to chain of vfs hanging off mntinfo */
205 mi->mi_vfsp = vfsp;
206 mi->mi_rootvp = rootvp;
207
208 /* set filesystem block size */
209 vfsp->mnt_stat.f_bsize = 8192; /* XXX -JJK */
210
211 /* Set f_iosize. XXX -- inamura@isl.ntt.co.jp.
212 For vnode_pager_haspage() references. The value should be obtained
213 from underlying UFS. */
214 /* Checked UFS. iosize is set as 8192 */
215 vfsp->mnt_stat.f_iosize = 8192;
216
217 /* error is currently guaranteed to be zero, but in case some
218 code changes... */
219 CODADEBUG(1,
220 myprintf(("coda_omount returned %d\n",error)););
221 if (error)
222 MARK_INT_FAIL(CODA_MOUNT_STATS);
223 else
224 MARK_INT_SAT(CODA_MOUNT_STATS);
225
226 return(error);
227}
228
229int
230coda_unmount(vfsp, mntflags, td)
231 struct mount *vfsp;
232 int mntflags;
233 struct thread *td;
234{
235 struct coda_mntinfo *mi = vftomi(vfsp);
236 int active, error = 0;
237
238 ENTRY;
239 MARK_ENTRY(CODA_UMOUNT_STATS);
240 if (!CODA_MOUNTED(vfsp)) {
241 MARK_INT_FAIL(CODA_UMOUNT_STATS);
242 return(EINVAL);
243 }
244
245 if (mi->mi_vfsp == vfsp) { /* We found the victim */
246 if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp)))
247 return (EBUSY); /* Venus is still running */
248
249#ifdef DEBUG
250 printf("coda_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp));
251#endif
252 vrele(mi->mi_rootvp);
253 active = coda_kill(vfsp, NOT_DOWNCALL);
254 ASSERT_VOP_LOCKED(mi->mi_rootvp, "coda_unmount");
255 mi->mi_rootvp->v_vflag &= ~VV_ROOT;
256 error = vflush(mi->mi_vfsp, 0, FORCECLOSE, td);
257#ifdef CODA_VERBOSE
258 printf("coda_unmount: active = %d, vflush active %d\n", active, error);
259#endif
260 error = 0;
261 /* I'm going to take this out to allow lookups to go through. I'm
262 * not sure it's important anyway. -- DCS 2/2/94
263 */
264 /* vfsp->VFS_DATA = NULL; */
265
266 /* No more vfsp's to hold onto */
267 mi->mi_vfsp = NULL;
268 mi->mi_rootvp = NULL;
269
270 if (error)
271 MARK_INT_FAIL(CODA_UMOUNT_STATS);
272 else
273 MARK_INT_SAT(CODA_UMOUNT_STATS);
274
275 return(error);
276 }
277 return (EINVAL);
278}
279
280/*
281 * find root of cfs
282 */
283int
284coda_root(vfsp, vpp, td)
285 struct mount *vfsp;
286 struct vnode **vpp;
287 struct thread *td;
288{
289 struct coda_mntinfo *mi = vftomi(vfsp);
290 struct vnode **result;
291 int error;
292 struct proc *p = td->td_proc;
293 CodaFid VFid;
294 static const CodaFid invalfid = INVAL_FID;
295
296 ENTRY;
297 MARK_ENTRY(CODA_ROOT_STATS);
298 result = NULL;
299
300 if (vfsp == mi->mi_vfsp) {
301 /*
302 * Cache the root across calls. We only need to pass the request
303 * on to Venus if the root vnode is the dummy we installed in
304 * coda_omount() with all c_fid members zeroed.
305 *
306 * XXX In addition, if we are called between coda_omount() and
307 * coda_start(), we assume that the request is from vfs_omount()
308 * (before the call to checkdirs()) and return the dummy root
309 * node to avoid a deadlock. This bug is fixed in the Coda CVS
310 * repository but not in any released versions as of 6 Mar 2003.
311 */
312 if (memcmp(&VTOC(mi->mi_rootvp)->c_fid, &invalfid,
313 sizeof(CodaFid)) != 0 || mi->mi_started == 0)
314 { /* Found valid root. */
315 *vpp = mi->mi_rootvp;
316 /* On Mach, this is vref. On NetBSD, VOP_LOCK */
317#if 1
318 vref(*vpp);
319 vn_lock(*vpp, LK_EXCLUSIVE, td);
320#else
321 vget(*vpp, LK_EXCLUSIVE, td);
322#endif
323 MARK_INT_SAT(CODA_ROOT_STATS);
324 return(0);
325 }
326 }
327
328 error = venus_root(vftomi(vfsp), td->td_ucred, p, &VFid);
329
330 if (!error) {
331 /*
332 * Save the new rootfid in the cnode, and rehash the cnode into the
333 * cnode hash with the new fid key.
334 */
335 coda_unsave(VTOC(mi->mi_rootvp));
336 VTOC(mi->mi_rootvp)->c_fid = VFid;
337 coda_save(VTOC(mi->mi_rootvp));
338
339 *vpp = mi->mi_rootvp;
340#if 1
341 vref(*vpp);
342 vn_lock(*vpp, LK_EXCLUSIVE, td);
343#else
344 vget(*vpp, LK_EXCLUSIVE, td);
345#endif
346
347 MARK_INT_SAT(CODA_ROOT_STATS);
348 goto exit;
349 } else if (error == ENODEV || error == EINTR) {
350 /* Gross hack here! */
351 /*
352 * If Venus fails to respond to the CODA_ROOT call, coda_call returns
353 * ENODEV. Return the uninitialized root vnode to allow vfs
354 * operations such as unmount to continue. Without this hack,
355 * there is no way to do an unmount if Venus dies before a
356 * successful CODA_ROOT call is done. All vnode operations
357 * will fail.
358 */
359 *vpp = mi->mi_rootvp;
360#if 1
361 vref(*vpp);
362 vn_lock(*vpp, LK_EXCLUSIVE, td);
363#else
364 vget(*vpp, LK_EXCLUSIVE, td);
365#endif
366
367 MARK_INT_FAIL(CODA_ROOT_STATS);
368 error = 0;
369 goto exit;
370 } else {
371 CODADEBUG( CODA_ROOT, myprintf(("error %d in CODA_ROOT\n", error)); );
372 MARK_INT_FAIL(CODA_ROOT_STATS);
373
374 goto exit;
375 }
376
377 exit:
378 return(error);
379}
380
381int
382coda_start(mp, flags, td)
383 struct mount *mp;
384 int flags;
385 struct thread *td;
386{
387
388 /* XXX See coda_root(). */
389 vftomi(mp)->mi_started = 1;
390 return (0);
391}
392
393/*
394 * Get filesystem statistics.
395 */
396int
397coda_nb_statfs(vfsp, sbp, td)
398 register struct mount *vfsp;
399 struct statfs *sbp;
400 struct thread *td;
401{
402 ENTRY;
403/* MARK_ENTRY(CODA_STATFS_STATS); */
404 if (!CODA_MOUNTED(vfsp)) {
405/* MARK_INT_FAIL(CODA_STATFS_STATS);*/
406 return(EINVAL);
407 }
408
409 bzero(sbp, sizeof(struct statfs));
410 /* XXX - what to do about f_flags, others? --bnoble */
411 /* Below This is what AFS does
412 #define NB_SFS_SIZ 0x895440
413 */
414 /* Note: Normal fs's have a bsize of 0x400 == 1024 */
415 sbp->f_type = vfsp->mnt_vfc->vfc_typenum;
416 sbp->f_bsize = 8192; /* XXX */
417 sbp->f_iosize = 8192; /* XXX */
418#define NB_SFS_SIZ 0x8AB75D
419 sbp->f_blocks = NB_SFS_SIZ;
420 sbp->f_bfree = NB_SFS_SIZ;
421 sbp->f_bavail = NB_SFS_SIZ;
422 sbp->f_files = NB_SFS_SIZ;
423 sbp->f_ffree = NB_SFS_SIZ;
424 bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t));
425 snprintf(sbp->f_mntonname, sizeof(sbp->f_mntonname), "/coda");
426 snprintf(sbp->f_mntfromname, sizeof(sbp->f_mntfromname), "CODA");
427 snprintf(sbp->f_fstypename, sizeof(sbp->f_fstypename), "coda");
428/* MARK_INT_SAT(CODA_STATFS_STATS); */
429 return(0);
430}
431
432/*
433 * Flush any pending I/O.
434 */
435int
436coda_sync(vfsp, waitfor, cred, td)
437 struct mount *vfsp;
438 int waitfor;
439 struct ucred *cred;
440 struct thread *td;
441{
442 ENTRY;
443 MARK_ENTRY(CODA_SYNC_STATS);
444 MARK_INT_SAT(CODA_SYNC_STATS);
445 return(0);
446}
447
448/*
449 * fhtovp is now what vget used to be in 4.3-derived systems. For
450 * some silly reason, vget is now keyed by a 32 bit ino_t, rather than
451 * a type-specific fid.
452 */
453int
454coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
455 register struct mount *vfsp;
456 struct fid *fhp;
457 struct mbuf *nam;
458 struct vnode **vpp;
459 int *exflagsp;
460 struct ucred **creadanonp;
461{
462 struct cfid *cfid = (struct cfid *)fhp;
463 struct cnode *cp = 0;
464 int error;
465 struct thread *td = curthread; /* XXX -mach */
466 struct proc *p = td->td_proc;
467 CodaFid VFid;
468 int vtype;
469
470 ENTRY;
471
472 MARK_ENTRY(CODA_VGET_STATS);
473 /* Check for vget of control object. */
474 if (IS_CTL_FID(&cfid->cfid_fid)) {
475 *vpp = coda_ctlvp;
476 vref(coda_ctlvp);
477 MARK_INT_SAT(CODA_VGET_STATS);
478 return(0);
479 }
480
481 error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, td->td_ucred, p, &VFid, &vtype);
482
483 if (error) {
484 CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));)
485 *vpp = (struct vnode *)0;
486 } else {
487 CODADEBUG(CODA_VGET,
488 myprintf(("vget: %s type %d result %d\n",
489 coda_f2s(&VFid), vtype, error)); )
490 cp = make_coda_node(&VFid, vfsp, vtype);
491 *vpp = CTOV(cp);
492 }
493 return(error);
494}
495
496/*
497 * To allow for greater ease of use, some vnodes may be orphaned when
498 * Venus dies. Certain operations should still be allowed to go
499 * through, but without propagating ophan-ness. So this function will
500 * get a new vnode for the file from the current run of Venus. */
501
502int
503getNewVnode(vpp)
504 struct vnode **vpp;
505{
506 struct cfid cfid;
507 struct coda_mntinfo *mi = vftomi((*vpp)->v_mount);
508
509 ENTRY;
510
511 cfid.cfid_len = (short)sizeof(CodaFid);
512 cfid.cfid_fid = VTOC(*vpp)->c_fid; /* Structure assignment. */
513 /* XXX ? */
514
515 /* We're guessing that if set, the 1st element on the list is a
516 * valid vnode to use. If not, return ENODEV as venus is dead.
517 */
518 if (mi->mi_vfsp == NULL)
519 return ENODEV;
520
521 return coda_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp,
522 NULL, NULL);
523}
524
525#include <ufs/ufs/extattr.h>
526#include <ufs/ufs/quota.h>
527#include <ufs/ufs/ufsmount.h>
528/* get the mount structure corresponding to a given device. Assume
529 * device corresponds to a UFS. Return NULL if no device is found.
530 */
531struct mount *devtomp(dev)
532 struct cdev *dev;
533{
534 struct mount *mp;
535
536 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
537 if (((VFSTOUFS(mp))->um_dev == dev)) {
538 /* mount corresponds to UFS and the device matches one we want */
539 return(mp);
540 }
541 }
542 /* mount structure wasn't found */
543 return(NULL);
544}
545
546struct vfsops coda_vfsops = {
547 .vfs_omount = coda_omount,
548 .vfs_root = coda_root,
549 .vfs_start = coda_start,
550 .vfs_statfs = coda_nb_statfs,
551 .vfs_sync = coda_sync,
552 .vfs_unmount = coda_unmount,
553};
554
555VFS_SET(coda_vfsops, coda, VFCF_NETWORK);
| 47
48#include <sys/param.h>
49#include <sys/systm.h>
50#include <sys/conf.h>
51#include <sys/kernel.h>
52#include <sys/lock.h>
53#include <sys/malloc.h>
54#include <sys/mount.h>
55#include <sys/namei.h>
56#include <sys/proc.h>
57
58#include <coda/coda.h>
59#include <coda/cnode.h>
60#include <coda/coda_vfsops.h>
61#include <coda/coda_venus.h>
62#include <coda/coda_subr.h>
63#include <coda/coda_opstats.h>
64
65MALLOC_DEFINE(M_CODA, "CODA storage", "Various Coda Structures");
66
67int codadebug = 0;
68int coda_vfsop_print_entry = 0;
69#define ENTRY if(coda_vfsop_print_entry) myprintf(("Entered %s\n",__func__))
70
71struct vnode *coda_ctlvp;
72struct coda_mntinfo coda_mnttbl[NVCODA]; /* indexed by minor device number */
73
74/* structure to keep statistics of internally generated/satisfied calls */
75
76struct coda_op_stats coda_vfsopstats[CODA_VFSOPS_SIZE];
77
78#define MARK_ENTRY(op) (coda_vfsopstats[op].entries++)
79#define MARK_INT_SAT(op) (coda_vfsopstats[op].sat_intrn++)
80#define MARK_INT_FAIL(op) (coda_vfsopstats[op].unsat_intrn++)
81#define MRAK_INT_GEN(op) (coda_vfsopstats[op].gen_intrn++)
82
83extern int coda_nc_initialized; /* Set if cache has been initialized */
84extern int vc_nb_open(struct cdev *, int, int, struct thread *);
85
86static vfs_omount_t coda_omount;
87
88int
89coda_vfsopstats_init(void)
90{
91 register int i;
92
93 for (i=0;i<CODA_VFSOPS_SIZE;i++) {
94 coda_vfsopstats[i].opcode = i;
95 coda_vfsopstats[i].entries = 0;
96 coda_vfsopstats[i].sat_intrn = 0;
97 coda_vfsopstats[i].unsat_intrn = 0;
98 coda_vfsopstats[i].gen_intrn = 0;
99 }
100
101 return 0;
102}
103
104/*
105 * cfs mount vfsop
106 * Set up mount info record and attach it to vfs struct.
107 */
108/*ARGSUSED*/
109int
110coda_omount(vfsp, path, data, td)
111 struct mount *vfsp; /* Allocated and initialized by mount(2) */
112 char *path; /* path covered: ignored by the fs-layer */
113 caddr_t data; /* Need to define a data type for this in netbsd? */
114 struct thread *td;
115{
116 struct vnode *dvp;
117 struct cnode *cp;
118 struct cdev *dev;
119 struct coda_mntinfo *mi;
120 struct vnode *rootvp;
121 CodaFid rootfid = INVAL_FID;
122 CodaFid ctlfid = CTL_FID;
123 int error;
124 struct nameidata ndp;
125 ENTRY;
126
127 coda_vfsopstats_init();
128 coda_vnodeopstats_init();
129
130 MARK_ENTRY(CODA_MOUNT_STATS);
131 if (CODA_MOUNTED(vfsp)) {
132 MARK_INT_FAIL(CODA_MOUNT_STATS);
133 return(EBUSY);
134 }
135
136 /* Validate mount device. Similar to getmdev(). */
137 NDINIT(&ndp, LOOKUP, FOLLOW, UIO_USERSPACE, data, td);
138 error = namei(&ndp);
139 dvp = ndp.ni_vp;
140
141 if (error) {
142 MARK_INT_FAIL(CODA_MOUNT_STATS);
143 return (error);
144 }
145 if (dvp->v_type != VCHR) {
146 MARK_INT_FAIL(CODA_MOUNT_STATS);
147 vrele(dvp);
148 NDFREE(&ndp, NDF_ONLY_PNBUF);
149 return(ENXIO);
150 }
151 dev = dvp->v_rdev;
152 vrele(dvp);
153 NDFREE(&ndp, NDF_ONLY_PNBUF);
154
155 /*
156 * See if the device table matches our expectations.
157 */
158 if (devsw(dev)->d_open != vc_nb_open)
159 {
160 MARK_INT_FAIL(CODA_MOUNT_STATS);
161 return(ENXIO);
162 }
163
164 if (minor(dev) >= NVCODA || minor(dev) < 0) {
165 MARK_INT_FAIL(CODA_MOUNT_STATS);
166 return(ENXIO);
167 }
168
169 /*
170 * Initialize the mount record and link it to the vfs struct
171 */
172 mi = &coda_mnttbl[minor(dev)];
173
174 if (!VC_OPEN(&mi->mi_vcomm)) {
175 MARK_INT_FAIL(CODA_MOUNT_STATS);
176 return(ENODEV);
177 }
178
179 /* No initialization (here) of mi_vcomm! */
180 vfsp->mnt_data = (qaddr_t)mi;
181 vfs_getnewfsid (vfsp);
182
183 mi->mi_vfsp = vfsp;
184 mi->mi_started = 0; /* XXX See coda_root() */
185
186 /*
187 * Make a root vnode to placate the Vnode interface, but don't
188 * actually make the CODA_ROOT call to venus until the first call
189 * to coda_root in case a server is down while venus is starting.
190 */
191 cp = make_coda_node(&rootfid, vfsp, VDIR);
192 rootvp = CTOV(cp);
193 rootvp->v_vflag |= VV_ROOT;
194
195/* cp = make_coda_node(&ctlfid, vfsp, VCHR);
196 The above code seems to cause a loop in the cnode links.
197 I don't totally understand when it happens, it is caught
198 when closing down the system.
199 */
200 cp = make_coda_node(&ctlfid, 0, VCHR);
201
202 coda_ctlvp = CTOV(cp);
203
204 /* Add vfs and rootvp to chain of vfs hanging off mntinfo */
205 mi->mi_vfsp = vfsp;
206 mi->mi_rootvp = rootvp;
207
208 /* set filesystem block size */
209 vfsp->mnt_stat.f_bsize = 8192; /* XXX -JJK */
210
211 /* Set f_iosize. XXX -- inamura@isl.ntt.co.jp.
212 For vnode_pager_haspage() references. The value should be obtained
213 from underlying UFS. */
214 /* Checked UFS. iosize is set as 8192 */
215 vfsp->mnt_stat.f_iosize = 8192;
216
217 /* error is currently guaranteed to be zero, but in case some
218 code changes... */
219 CODADEBUG(1,
220 myprintf(("coda_omount returned %d\n",error)););
221 if (error)
222 MARK_INT_FAIL(CODA_MOUNT_STATS);
223 else
224 MARK_INT_SAT(CODA_MOUNT_STATS);
225
226 return(error);
227}
228
229int
230coda_unmount(vfsp, mntflags, td)
231 struct mount *vfsp;
232 int mntflags;
233 struct thread *td;
234{
235 struct coda_mntinfo *mi = vftomi(vfsp);
236 int active, error = 0;
237
238 ENTRY;
239 MARK_ENTRY(CODA_UMOUNT_STATS);
240 if (!CODA_MOUNTED(vfsp)) {
241 MARK_INT_FAIL(CODA_UMOUNT_STATS);
242 return(EINVAL);
243 }
244
245 if (mi->mi_vfsp == vfsp) { /* We found the victim */
246 if (!IS_UNMOUNTING(VTOC(mi->mi_rootvp)))
247 return (EBUSY); /* Venus is still running */
248
249#ifdef DEBUG
250 printf("coda_unmount: ROOT: vp %p, cp %p\n", mi->mi_rootvp, VTOC(mi->mi_rootvp));
251#endif
252 vrele(mi->mi_rootvp);
253 active = coda_kill(vfsp, NOT_DOWNCALL);
254 ASSERT_VOP_LOCKED(mi->mi_rootvp, "coda_unmount");
255 mi->mi_rootvp->v_vflag &= ~VV_ROOT;
256 error = vflush(mi->mi_vfsp, 0, FORCECLOSE, td);
257#ifdef CODA_VERBOSE
258 printf("coda_unmount: active = %d, vflush active %d\n", active, error);
259#endif
260 error = 0;
261 /* I'm going to take this out to allow lookups to go through. I'm
262 * not sure it's important anyway. -- DCS 2/2/94
263 */
264 /* vfsp->VFS_DATA = NULL; */
265
266 /* No more vfsp's to hold onto */
267 mi->mi_vfsp = NULL;
268 mi->mi_rootvp = NULL;
269
270 if (error)
271 MARK_INT_FAIL(CODA_UMOUNT_STATS);
272 else
273 MARK_INT_SAT(CODA_UMOUNT_STATS);
274
275 return(error);
276 }
277 return (EINVAL);
278}
279
280/*
281 * find root of cfs
282 */
283int
284coda_root(vfsp, vpp, td)
285 struct mount *vfsp;
286 struct vnode **vpp;
287 struct thread *td;
288{
289 struct coda_mntinfo *mi = vftomi(vfsp);
290 struct vnode **result;
291 int error;
292 struct proc *p = td->td_proc;
293 CodaFid VFid;
294 static const CodaFid invalfid = INVAL_FID;
295
296 ENTRY;
297 MARK_ENTRY(CODA_ROOT_STATS);
298 result = NULL;
299
300 if (vfsp == mi->mi_vfsp) {
301 /*
302 * Cache the root across calls. We only need to pass the request
303 * on to Venus if the root vnode is the dummy we installed in
304 * coda_omount() with all c_fid members zeroed.
305 *
306 * XXX In addition, if we are called between coda_omount() and
307 * coda_start(), we assume that the request is from vfs_omount()
308 * (before the call to checkdirs()) and return the dummy root
309 * node to avoid a deadlock. This bug is fixed in the Coda CVS
310 * repository but not in any released versions as of 6 Mar 2003.
311 */
312 if (memcmp(&VTOC(mi->mi_rootvp)->c_fid, &invalfid,
313 sizeof(CodaFid)) != 0 || mi->mi_started == 0)
314 { /* Found valid root. */
315 *vpp = mi->mi_rootvp;
316 /* On Mach, this is vref. On NetBSD, VOP_LOCK */
317#if 1
318 vref(*vpp);
319 vn_lock(*vpp, LK_EXCLUSIVE, td);
320#else
321 vget(*vpp, LK_EXCLUSIVE, td);
322#endif
323 MARK_INT_SAT(CODA_ROOT_STATS);
324 return(0);
325 }
326 }
327
328 error = venus_root(vftomi(vfsp), td->td_ucred, p, &VFid);
329
330 if (!error) {
331 /*
332 * Save the new rootfid in the cnode, and rehash the cnode into the
333 * cnode hash with the new fid key.
334 */
335 coda_unsave(VTOC(mi->mi_rootvp));
336 VTOC(mi->mi_rootvp)->c_fid = VFid;
337 coda_save(VTOC(mi->mi_rootvp));
338
339 *vpp = mi->mi_rootvp;
340#if 1
341 vref(*vpp);
342 vn_lock(*vpp, LK_EXCLUSIVE, td);
343#else
344 vget(*vpp, LK_EXCLUSIVE, td);
345#endif
346
347 MARK_INT_SAT(CODA_ROOT_STATS);
348 goto exit;
349 } else if (error == ENODEV || error == EINTR) {
350 /* Gross hack here! */
351 /*
352 * If Venus fails to respond to the CODA_ROOT call, coda_call returns
353 * ENODEV. Return the uninitialized root vnode to allow vfs
354 * operations such as unmount to continue. Without this hack,
355 * there is no way to do an unmount if Venus dies before a
356 * successful CODA_ROOT call is done. All vnode operations
357 * will fail.
358 */
359 *vpp = mi->mi_rootvp;
360#if 1
361 vref(*vpp);
362 vn_lock(*vpp, LK_EXCLUSIVE, td);
363#else
364 vget(*vpp, LK_EXCLUSIVE, td);
365#endif
366
367 MARK_INT_FAIL(CODA_ROOT_STATS);
368 error = 0;
369 goto exit;
370 } else {
371 CODADEBUG( CODA_ROOT, myprintf(("error %d in CODA_ROOT\n", error)); );
372 MARK_INT_FAIL(CODA_ROOT_STATS);
373
374 goto exit;
375 }
376
377 exit:
378 return(error);
379}
380
381int
382coda_start(mp, flags, td)
383 struct mount *mp;
384 int flags;
385 struct thread *td;
386{
387
388 /* XXX See coda_root(). */
389 vftomi(mp)->mi_started = 1;
390 return (0);
391}
392
393/*
394 * Get filesystem statistics.
395 */
396int
397coda_nb_statfs(vfsp, sbp, td)
398 register struct mount *vfsp;
399 struct statfs *sbp;
400 struct thread *td;
401{
402 ENTRY;
403/* MARK_ENTRY(CODA_STATFS_STATS); */
404 if (!CODA_MOUNTED(vfsp)) {
405/* MARK_INT_FAIL(CODA_STATFS_STATS);*/
406 return(EINVAL);
407 }
408
409 bzero(sbp, sizeof(struct statfs));
410 /* XXX - what to do about f_flags, others? --bnoble */
411 /* Below This is what AFS does
412 #define NB_SFS_SIZ 0x895440
413 */
414 /* Note: Normal fs's have a bsize of 0x400 == 1024 */
415 sbp->f_type = vfsp->mnt_vfc->vfc_typenum;
416 sbp->f_bsize = 8192; /* XXX */
417 sbp->f_iosize = 8192; /* XXX */
418#define NB_SFS_SIZ 0x8AB75D
419 sbp->f_blocks = NB_SFS_SIZ;
420 sbp->f_bfree = NB_SFS_SIZ;
421 sbp->f_bavail = NB_SFS_SIZ;
422 sbp->f_files = NB_SFS_SIZ;
423 sbp->f_ffree = NB_SFS_SIZ;
424 bcopy((caddr_t)&(vfsp->mnt_stat.f_fsid), (caddr_t)&(sbp->f_fsid), sizeof (fsid_t));
425 snprintf(sbp->f_mntonname, sizeof(sbp->f_mntonname), "/coda");
426 snprintf(sbp->f_mntfromname, sizeof(sbp->f_mntfromname), "CODA");
427 snprintf(sbp->f_fstypename, sizeof(sbp->f_fstypename), "coda");
428/* MARK_INT_SAT(CODA_STATFS_STATS); */
429 return(0);
430}
431
432/*
433 * Flush any pending I/O.
434 */
435int
436coda_sync(vfsp, waitfor, cred, td)
437 struct mount *vfsp;
438 int waitfor;
439 struct ucred *cred;
440 struct thread *td;
441{
442 ENTRY;
443 MARK_ENTRY(CODA_SYNC_STATS);
444 MARK_INT_SAT(CODA_SYNC_STATS);
445 return(0);
446}
447
448/*
449 * fhtovp is now what vget used to be in 4.3-derived systems. For
450 * some silly reason, vget is now keyed by a 32 bit ino_t, rather than
451 * a type-specific fid.
452 */
453int
454coda_fhtovp(vfsp, fhp, nam, vpp, exflagsp, creadanonp)
455 register struct mount *vfsp;
456 struct fid *fhp;
457 struct mbuf *nam;
458 struct vnode **vpp;
459 int *exflagsp;
460 struct ucred **creadanonp;
461{
462 struct cfid *cfid = (struct cfid *)fhp;
463 struct cnode *cp = 0;
464 int error;
465 struct thread *td = curthread; /* XXX -mach */
466 struct proc *p = td->td_proc;
467 CodaFid VFid;
468 int vtype;
469
470 ENTRY;
471
472 MARK_ENTRY(CODA_VGET_STATS);
473 /* Check for vget of control object. */
474 if (IS_CTL_FID(&cfid->cfid_fid)) {
475 *vpp = coda_ctlvp;
476 vref(coda_ctlvp);
477 MARK_INT_SAT(CODA_VGET_STATS);
478 return(0);
479 }
480
481 error = venus_fhtovp(vftomi(vfsp), &cfid->cfid_fid, td->td_ucred, p, &VFid, &vtype);
482
483 if (error) {
484 CODADEBUG(CODA_VGET, myprintf(("vget error %d\n",error));)
485 *vpp = (struct vnode *)0;
486 } else {
487 CODADEBUG(CODA_VGET,
488 myprintf(("vget: %s type %d result %d\n",
489 coda_f2s(&VFid), vtype, error)); )
490 cp = make_coda_node(&VFid, vfsp, vtype);
491 *vpp = CTOV(cp);
492 }
493 return(error);
494}
495
496/*
497 * To allow for greater ease of use, some vnodes may be orphaned when
498 * Venus dies. Certain operations should still be allowed to go
499 * through, but without propagating ophan-ness. So this function will
500 * get a new vnode for the file from the current run of Venus. */
501
502int
503getNewVnode(vpp)
504 struct vnode **vpp;
505{
506 struct cfid cfid;
507 struct coda_mntinfo *mi = vftomi((*vpp)->v_mount);
508
509 ENTRY;
510
511 cfid.cfid_len = (short)sizeof(CodaFid);
512 cfid.cfid_fid = VTOC(*vpp)->c_fid; /* Structure assignment. */
513 /* XXX ? */
514
515 /* We're guessing that if set, the 1st element on the list is a
516 * valid vnode to use. If not, return ENODEV as venus is dead.
517 */
518 if (mi->mi_vfsp == NULL)
519 return ENODEV;
520
521 return coda_fhtovp(mi->mi_vfsp, (struct fid*)&cfid, NULL, vpp,
522 NULL, NULL);
523}
524
525#include <ufs/ufs/extattr.h>
526#include <ufs/ufs/quota.h>
527#include <ufs/ufs/ufsmount.h>
528/* get the mount structure corresponding to a given device. Assume
529 * device corresponds to a UFS. Return NULL if no device is found.
530 */
531struct mount *devtomp(dev)
532 struct cdev *dev;
533{
534 struct mount *mp;
535
536 TAILQ_FOREACH(mp, &mountlist, mnt_list) {
537 if (((VFSTOUFS(mp))->um_dev == dev)) {
538 /* mount corresponds to UFS and the device matches one we want */
539 return(mp);
540 }
541 }
542 /* mount structure wasn't found */
543 return(NULL);
544}
545
546struct vfsops coda_vfsops = {
547 .vfs_omount = coda_omount,
548 .vfs_root = coda_root,
549 .vfs_start = coda_start,
550 .vfs_statfs = coda_nb_statfs,
551 .vfs_sync = coda_sync,
552 .vfs_unmount = coda_unmount,
553};
554
555VFS_SET(coda_vfsops, coda, VFCF_NETWORK);
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