2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
11 * osi_vfsops.c for IRIX
13 #include <afsconfig.h>
14 #include "afs/param.h"
17 #include "afs/sysincludes.h" /* Standard vendor system headers */
18 #include "afsincludes.h" /* Afs-based standard headers */
19 #include "afs/afs_stats.h" /* statistics stuff */
20 #include "sys/syssgi.h"
23 struct vfs *afs_globalVFS = 0;
24 struct vcache *afs_globalVp = 0;
26 #ifdef AFS_SGI_VNODE_GLUE
27 #include <sys/invent.h>
29 mutex_t afs_init_kern_lock;
33 #define SYS_setgroups SGI_SETGROUPS
35 int (*nfs_rfsdisptab_v2) () = NULL;
40 #include "sys/mload.h"
41 char *Afs_mversion = M_VERSION;
43 extern int (*setgroupsp) (int, gid_t *);
44 extern struct afs_lock afs_xvcache;
45 extern int idbg_afsuser();
46 extern void afs_mpservice(void *);
49 * AFS fs initialization - we also plug system calls here
51 #define NewSystemCall(n,f,a) \
52 syscallsw[ABI_IRIX5].sc_sysent[(n)-1000].sy_narg = a; \
53 syscallsw[ABI_IRIX5].sc_sysent[(n)-1000].sy_call = f; \
54 syscallsw[ABI_IRIX5].sc_sysent[(n)-1000].sy_flags = 0;
55 extern struct vfsops Afs_vfsops, *afs_vfsopsp;
56 extern struct vnodeops Afs_vnodeops, *afs_vnodeopsp;
57 extern void (*afsidestroyp) (struct inode *);
58 extern void afsidestroy(struct inode *);
59 extern int (*idbg_prafsnodep) (vnode_t *);
60 extern int (*idbg_afsvfslistp) (void);
61 extern int idbg_prafsnode(vnode_t *);
62 extern int idbg_afsvfslist(void);
66 Afs_init(struct vfssw *vswp, int fstype)
68 extern int Afs_syscall(), Afs_xsetgroups(), afs_pioctl(), afs_setpag();
69 extern int icreate(), iopen(), iinc(), idec();
70 #ifdef AFS_SGI_XFS_IOPS_ENV
73 extern int iread(), iwrite();
80 #ifdef AFS_SGI_VNODE_GLUE
81 /* Synchronize doing NUMA test. */
82 mutex_init(&afs_init_kern_lock, MUTEX_DEFAULT, "init_kern_lock");
85 * set up pointers from main kernel into us
87 afs_vnodeopsp = &Afs_vnodeops;
88 afs_vfsopsp = &Afs_vfsops;
89 afsidestroyp = afsidestroy;
90 idbg_prafsnodep = idbg_prafsnode;
91 idbg_afsvfslistp = idbg_afsvfslist;
92 NewSystemCall(AFS_SYSCALL, Afs_syscall, 6);
93 NewSystemCall(AFS_PIOCTL, afs_pioctl, 4);
94 NewSystemCall(AFS_SETPAG, afs_setpag, 0);
95 NewSystemCall(AFS_IOPEN, iopen, 3);
96 NewSystemCall(AFS_ICREATE, icreate, 6);
97 NewSystemCall(AFS_IINC, iinc, 3);
98 NewSystemCall(AFS_IDEC, idec, 3);
99 #ifdef AFS_SGI_XFS_IOPS_ENV
100 NewSystemCall(AFS_IOPEN64, iopen64, 4);
102 NewSystemCall(AFS_IREAD, iread, 6);
103 NewSystemCall(AFS_IWRITE, iwrite, 6);
106 /* last replace these */
107 setgroupsp = Afs_xsetgroups;
109 idbg_addfunc("afsuser", idbg_afsuser);
114 extern int afs_mount(), afs_unmount(), afs_root(), afs_statfs();
116 extern int afs_sync(OSI_VFS_DECL(afsp), int flags, struct cred *cr);
118 extern int afs_sync(OSI_VFS_DECL(afsp), short flags, struct cred *cr);
120 extern int afs_vget(OSI_VFS_DECL(afsp), vnode_t ** vpp, struct fid *afidp);
122 struct vfsops afs_lockedvfsops =
124 struct vfsops Afs_vfsops =
129 BHV_IDENTITY_INIT_POSITION(VFS_POSITION_BASE),
136 fs_nosys, /* rootinit */
137 fs_nosys, /* mntupdate */
145 fs_nosys, /* mountroot */
147 fs_nosys, /* realvfsops */
148 fs_import, /* import */
149 fs_nosys, /* quotactl */
151 fs_nosys, /* swapvp */
154 extern struct afs_q VLRU; /*vcache LRU */
157 static bhv_desc_t afs_vfs_bhv;
159 afs_mount(struct vfs *afsp, vnode_t * mvp, struct mounta *uap,
165 AFS_STATCNT(afs_mount);
170 if (mvp->v_type != VDIR)
173 if (afs_globalVFS) { /* Don't allow remounts. */
177 afs_globalVFS = afsp;
178 afsp->vfs_bsize = 8192;
179 afsp->vfs_fsid.val[0] = AFS_VFSMAGIC; /* magic */
180 afsp->vfs_fsid.val[1] = afs_fstype;
182 vfs_insertbhv(afsp, &afs_vfs_bhv, &Afs_vfsops, &afs_vfs_bhv);
184 afsp->vfs_data = NULL;
186 afsp->vfs_fstype = afs_fstype;
187 afsp->vfs_dev = 0xbabebabe; /* XXX this should be unique */
189 #ifndef AFS_NONFSTRANS
190 if (nfs_rfsdisptab_v2)
191 afs_xlatorinit_v2(nfs_rfsdisptab_v2);
197 afs_unmount(OSI_VFS_ARG(afsp), flags, cr)
203 vnode_t *vp, *rootvp = NULL;
204 register struct afs_q *tq;
207 OSI_VFS_CONVERT(afsp);
209 AFS_STATCNT(afs_unmount);
215 * flush all pages from inactive vnodes - return
216 * EBUSY if any still in use
218 ObtainWriteLock(&afs_xvcache, 172);
219 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
222 vp = (vnode_t *) tvc;
223 if (error = afs_FlushVCache(tvc, &fv_slept))
224 if (vp->v_flag & VROOT) {
228 ReleaseWriteLock(&afs_xvcache);
234 * rootvp gets lots of ref counts
237 tvc = VTOAFS(rootvp);
238 if (tvc->opens || CheckLock(&tvc->lock) || LockWaiters(&tvc->lock)) {
239 ReleaseWriteLock(&afs_xvcache);
242 ReleaseWriteLock(&afs_xvcache);
245 ObtainWriteLock(&afs_xvcache, 173);
246 afs_FlushVCache(tvc, &fv_slept);
248 ReleaseWriteLock(&afs_xvcache);
252 VFS_REMOVEBHV(afsp, &afs_vfs_bhv);
259 afs_root(OSI_VFS_ARG(afsp), avpp)
263 register afs_int32 code = 0;
264 struct vrequest treq;
265 register struct vcache *tvp = 0;
266 OSI_VFS_CONVERT(afsp);
268 AFS_STATCNT(afs_root);
269 if (afs_globalVp && (afs_globalVp->f.states & CStatd)) {
273 afs_PutVCache(afs_globalVp);
277 if (!(code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
278 && !(code = afs_CheckInit())) {
279 tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
280 /* we really want this to stay around */
289 VN_HOLD(AFSTOV(tvp));
290 s = VN_LOCK(AFSTOV(tvp));
291 AFSTOV(tvp)->v_flag |= VROOT;
292 VN_UNLOCK(AFSTOV(tvp), s);
294 afs_globalVFS = afsp;
298 afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, *avpp,
299 ICL_TYPE_INT32, code);
303 afs_statfs(OSI_VFS_ARG(afsp), abp, avp)
306 struct vnode *avp; /* unused */
308 OSI_VFS_CONVERT(afsp);
310 AFS_STATCNT(afs_statfs);
311 abp->f_bsize = afsp->vfs_bsize;
312 abp->f_frsize = afsp->vfs_bsize;
313 /* Fake a high number below to satisfy programs that use the statfs
314 * call to make sure that there's enough space in the device partition
315 * before storing something there.
317 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
318 abp->f_ffree = abp->f_favail = 900000;
320 abp->f_fsid = AFS_VFSMAGIC; /* magic */
321 strcpy(abp->f_basetype, AFS_MOUNT_AFS);
323 abp->f_namemax = 256;
330 * sync's responsibilities include pushing back DELWRI pages
331 * Things to watch out for:
332 * 1) don't want to hold off new vnodes in the file system
333 * while pushing back pages
334 * 2) since we can deal with un-referenced vndoes need to watch
335 * races with folks who recycle vnodes
337 * SYNC_BDFLUSH - do NOT sleep waiting for an inode - also, when
338 * when pushing DELWRI - only push old ones.
339 * SYNC_PDFLUSH - push v_dpages.
340 * SYNC_ATTR - sync attributes - note that ordering considerations
341 * dictate that we also flush dirty pages
342 * SYNC_WAIT - do synchronouse writes - inode & delwri
343 * SYNC_NOWAIT - start delayed writes.
344 * SYNC_DELWRI - look at inodes w/ delwri pages. Other flags
345 * decide how to deal with them.
346 * SYNC_CLOSE - flush delwri and invalidate others.
347 * SYNC_FSDATA - push fs data (e.g. superblocks)
350 extern afs_int32 vcachegen;
351 #define PREEMPT_MASK 0x7f
357 afs_sync(OSI_VFS_DECL(afsp),
365 /* Why enable the vfs sync operation?? */
366 int error, lasterr, preempt;
369 afs_uint32 lvcachegen;
370 register struct afs_q *tq;
373 OSI_VFS_CONVERT(afsp);
377 * if not interested in vnodes, skip all this
380 if ((flags & (SYNC_CLOSE | SYNC_DELWRI | SYNC_PDFLUSH)) == 0)
382 #else /* AFS_SGI61_ENV */
383 if ((flags & (SYNC_CLOSE | SYNC_DELWRI | SYNC_ATTR)) == 0)
385 #endif /* AFS_SGI61_ENV */
387 ObtainReadLock(&afs_xvcache);
388 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
391 vp = (vnode_t *) tvc;
393 * Since we push all dirty pages on last close/VOP_INACTIVE
394 * we are only concerned with vnodes with
395 * active reference counts.
398 if (vp->v_count == 0) {
402 if ((flags & SYNC_CLOSE) == 0 && !AFS_VN_DIRTY(vp)) {
408 * ignore vnodes which need no flushing
410 if (flags & SYNC_DELWRI) {
411 if (!AFS_VN_DIRTY(vp)) {
417 else if (flags & SYNC_PDFLUSH) {
418 if (!VN_GET_DPAGES(vp)) {
423 #endif /* AFS_SGI61_ENV */
427 lvcachegen = vcachegen;
428 ReleaseReadLock(&afs_xvcache);
431 * Try to lock rwlock without sleeping. If we can't, we must
434 if (afs_rwlock_nowait(vp, 1) == 0) {
436 if (flags & (SYNC_BDFLUSH | SYNC_PDFLUSH))
437 #else /* AFS_SGI61_ENV */
438 if (flags & SYNC_BDFLUSH)
439 #endif /* AFS_SGI61_ENV */
442 ObtainReadLock(&afs_xvcache);
443 if (vcachegen != lvcachegen) {
444 ReleaseReadLock(&afs_xvcache);
449 AFS_RWLOCK(vp, VRWLOCK_WRITE);
453 if (flags & SYNC_CLOSE) {
454 PFLUSHINVALVP(vp, (off_t) 0, (off_t) tvc->f.m.Length);
457 else if (flags & SYNC_PDFLUSH) {
458 if (VN_GET_DPAGES(vp)) {
459 pdflush(vp, B_ASYNC);
462 #endif /* AFS_SGI61_ENV */
465 if ((flags & SYNC_DELWRI) && AFS_VN_DIRTY(vp)) {
467 PFLUSHVP(vp, (off_t) tvc->f.m.Length,
468 (flags & SYNC_WAIT) ? 0 : B_ASYNC, error);
469 #else /* AFS_SGI61_ENV */
470 if (flags & SYNC_WAIT)
471 /* push all and wait */
472 PFLUSHVP(vp, (off_t) tvc->f.m.Length, (off_t) 0, error);
473 else if (flags & SYNC_BDFLUSH) {
475 error = pdflush(vp, B_ASYNC);
477 /* push all but don't wait */
478 PFLUSHVP(vp, (off_t) tvc->f.m.Length, (off_t) B_ASYNC, error);
480 #endif /* AFS_SGI61_ENV */
484 * Release vp, check error and whether to preempt, and if
485 * we let go of xvcache lock and someone has changed the
486 * VLRU, restart the loop
489 AFS_RWUNLOCK(vp, VRWLOCK_WRITE);
493 if ((++preempt & PREEMPT_MASK) == 0) {
498 ObtainReadLock(&afs_xvcache);
499 if (vcachegen != lvcachegen) {
500 ReleaseReadLock(&afs_xvcache);
504 ReleaseReadLock(&afs_xvcache);
510 afs_vget(OSI_VFS_DECL(afsp), vnode_t ** avcp, struct fid * fidp)
512 struct VenusFid vfid;
513 struct vrequest treq;
514 register struct cell *tcell;
515 register afs_int32 code = 0;
518 #if defined(AFS_SGI64_ENV) && defined(CKPT) && !defined(_R5000_CVT_WAR)
522 OSI_VFS_CONVERT(afsp);
524 AFS_STATCNT(afs_vget);
528 #if defined(AFS_SGI64_ENV) && defined(CKPT) && !defined(_R5000_CVT_WAR)
529 afid2 = (afs_fid2_t *) fidp;
530 if (afid2->af_len == sizeof(afs_fid2_t) - sizeof(afid2->af_len)) {
531 /* It's a checkpoint restart fid. */
532 tcell = afs_GetCellByIndex(afid2->af_cell, READ_LOCK);
537 vfid.Cell = tcell->cellNum;
538 afs_PutCell(tcell, READ_LOCK);
539 vfid.Fid.Volume = afid2->af_volid;
540 vfid.Fid.Vnode = afid2->af_vno;
541 vfid.Fid.Unique = afid2->af_uniq;
543 if (code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
546 (vnode_t *) afs_GetVCache(&vfid, &treq, NULL, (struct vcache *)0);
554 if (code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
556 code = afs_osi_vget((struct vcache **)avcp, fidp, &treq);
559 afs_Trace3(afs_iclSetp, CM_TRACE_VGET, ICL_TYPE_POINTER, *avcp,
560 ICL_TYPE_INT32, treq.uid, ICL_TYPE_FID, &vfid);
561 code = afs_CheckCode(code, &treq, 42);
566 #ifdef MP /* locked versions of vfs operations. */
568 /* wrappers for vfs calls */
570 #define AFS_MP_VFS_ARG(A) bhv_desc_t A
572 #define AFS_MP_VFS_ARG(A) struct vfs A
576 mp_afs_mount(struct vfs *a, struct vnode *b, struct mounta *c,
584 rv = afs_lockedvfsops.vfs_mount(a, b, c, d
594 mp_afs_unmount(AFS_MP_VFS_ARG(*a), int b, struct cred *c)
598 rv = afs_lockedvfsops.vfs_unmount(a, b, c);
604 mp_afs_root(AFS_MP_VFS_ARG(*a), struct vnode **b)
608 rv = afs_lockedvfsops.vfs_root(a, b);
614 mp_afs_statvfs(AFS_MP_VFS_ARG(*a), struct statvfs *b, struct vnode *c)
618 rv = afs_lockedvfsops.vfs_statvfs(a, b, c);
624 mp_afs_sync(AFS_MP_VFS_ARG(*a),
634 rv = afs_lockedvfsops.vfs_sync(a, b, c);
640 mp_afs_vget(AFS_MP_VFS_ARG(*a), struct vnode **b, struct fid *c)
644 rv = afs_lockedvfsops.vfs_vget(a, b, c);
649 struct vfsops Afs_vfsops = {
652 BHV_IDENTITY_INIT_POSITION(VFS_POSITION_BASE),
659 fs_nosys, /* rootinit */
660 fs_nosys, /* mntupdate */
668 fs_nosys, /* mountroot */
670 fs_nosys, /* realvfsops */
671 fs_import, /* import */
672 fs_nosys, /* quotactl */
674 fs_nosys, /* swapvp */