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;
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);
220 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
223 vp = (vnode_t *) tvc;
224 if (error = afs_FlushVCache(tvc, &fv_slept)) {
225 if (vp->v_flag & VROOT) {
229 ReleaseWriteLock(&afs_xvcache);
239 * rootvp gets lots of ref counts
242 tvc = VTOAFS(rootvp);
243 if (tvc->opens || CheckLock(&tvc->lock) || LockWaiters(&tvc->lock)) {
244 ReleaseWriteLock(&afs_xvcache);
247 ReleaseWriteLock(&afs_xvcache);
250 ObtainWriteLock(&afs_xvcache, 173);
251 afs_FlushVCache(tvc, &fv_slept);
253 ReleaseWriteLock(&afs_xvcache);
257 VFS_REMOVEBHV(afsp, &afs_vfs_bhv);
264 afs_root(OSI_VFS_ARG(afsp), avpp)
269 struct vrequest treq;
270 struct vcache *tvp = 0;
271 OSI_VFS_CONVERT(afsp);
273 AFS_STATCNT(afs_root);
274 if (afs_globalVp && (afs_globalVp->f.states & CStatd)) {
278 afs_PutVCache(afs_globalVp);
282 if (!(code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
283 && !(code = afs_CheckInit())) {
284 tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
285 /* we really want this to stay around */
294 VN_HOLD(AFSTOV(tvp));
295 s = VN_LOCK(AFSTOV(tvp));
296 AFSTOV(tvp)->v_flag |= VROOT;
297 VN_UNLOCK(AFSTOV(tvp), s);
299 afs_globalVFS = afsp;
303 afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, *avpp,
304 ICL_TYPE_INT32, code);
308 afs_statfs(OSI_VFS_ARG(afsp), abp, avp)
311 struct vnode *avp; /* unused */
313 OSI_VFS_CONVERT(afsp);
315 AFS_STATCNT(afs_statfs);
316 abp->f_bsize = afsp->vfs_bsize;
317 abp->f_frsize = afsp->vfs_bsize;
318 /* Fake a high number below to satisfy programs that use the statfs
319 * call to make sure that there's enough space in the device partition
320 * before storing something there.
322 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
323 abp->f_ffree = abp->f_favail = 900000;
325 abp->f_fsid = AFS_VFSMAGIC; /* magic */
326 strcpy(abp->f_basetype, AFS_MOUNT_AFS);
328 abp->f_namemax = 256;
335 * sync's responsibilities include pushing back DELWRI pages
336 * Things to watch out for:
337 * 1) don't want to hold off new vnodes in the file system
338 * while pushing back pages
339 * 2) since we can deal with un-referenced vndoes need to watch
340 * races with folks who recycle vnodes
342 * SYNC_BDFLUSH - do NOT sleep waiting for an inode - also, when
343 * when pushing DELWRI - only push old ones.
344 * SYNC_PDFLUSH - push v_dpages.
345 * SYNC_ATTR - sync attributes - note that ordering considerations
346 * dictate that we also flush dirty pages
347 * SYNC_WAIT - do synchronouse writes - inode & delwri
348 * SYNC_NOWAIT - start delayed writes.
349 * SYNC_DELWRI - look at inodes w/ delwri pages. Other flags
350 * decide how to deal with them.
351 * SYNC_CLOSE - flush delwri and invalidate others.
352 * SYNC_FSDATA - push fs data (e.g. superblocks)
355 extern afs_int32 vcachegen;
356 #define PREEMPT_MASK 0x7f
362 afs_sync(OSI_VFS_DECL(afsp),
370 /* Why enable the vfs sync operation?? */
371 int error, lasterr, preempt;
374 afs_uint32 lvcachegen;
378 OSI_VFS_CONVERT(afsp);
382 * if not interested in vnodes, skip all this
385 if ((flags & (SYNC_CLOSE | SYNC_DELWRI | SYNC_PDFLUSH)) == 0)
387 #else /* AFS_SGI61_ENV */
388 if ((flags & (SYNC_CLOSE | SYNC_DELWRI | SYNC_ATTR)) == 0)
390 #endif /* AFS_SGI61_ENV */
392 ObtainReadLock(&afs_xvcache);
393 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
396 vp = (vnode_t *) tvc;
398 * Since we push all dirty pages on last close/VOP_INACTIVE
399 * we are only concerned with vnodes with
400 * active reference counts.
403 if (vp->v_count == 0) {
407 if ((flags & SYNC_CLOSE) == 0 && !AFS_VN_DIRTY(vp)) {
413 * ignore vnodes which need no flushing
415 if (flags & SYNC_DELWRI) {
416 if (!AFS_VN_DIRTY(vp)) {
422 else if (flags & SYNC_PDFLUSH) {
423 if (!VN_GET_DPAGES(vp)) {
428 #endif /* AFS_SGI61_ENV */
432 lvcachegen = vcachegen;
433 ReleaseReadLock(&afs_xvcache);
436 * Try to lock rwlock without sleeping. If we can't, we must
439 if (afs_rwlock_nowait(vp, 1) == 0) {
441 if (flags & (SYNC_BDFLUSH | SYNC_PDFLUSH))
442 #else /* AFS_SGI61_ENV */
443 if (flags & SYNC_BDFLUSH)
444 #endif /* AFS_SGI61_ENV */
447 ObtainReadLock(&afs_xvcache);
448 if (vcachegen != lvcachegen) {
449 ReleaseReadLock(&afs_xvcache);
454 AFS_RWLOCK(vp, VRWLOCK_WRITE);
458 if (flags & SYNC_CLOSE) {
459 PFLUSHINVALVP(vp, (off_t) 0, (off_t) tvc->f.m.Length);
462 else if (flags & SYNC_PDFLUSH) {
463 if (VN_GET_DPAGES(vp)) {
464 pdflush(vp, B_ASYNC);
467 #endif /* AFS_SGI61_ENV */
470 if ((flags & SYNC_DELWRI) && AFS_VN_DIRTY(vp)) {
472 PFLUSHVP(vp, (off_t) tvc->f.m.Length,
473 (flags & SYNC_WAIT) ? 0 : B_ASYNC, error);
474 #else /* AFS_SGI61_ENV */
475 if (flags & SYNC_WAIT)
476 /* push all and wait */
477 PFLUSHVP(vp, (off_t) tvc->f.m.Length, (off_t) 0, error);
478 else if (flags & SYNC_BDFLUSH) {
480 error = pdflush(vp, B_ASYNC);
482 /* push all but don't wait */
483 PFLUSHVP(vp, (off_t) tvc->f.m.Length, (off_t) B_ASYNC, error);
485 #endif /* AFS_SGI61_ENV */
489 * Release vp, check error and whether to preempt, and if
490 * we let go of xvcache lock and someone has changed the
491 * VLRU, restart the loop
494 AFS_RWUNLOCK(vp, VRWLOCK_WRITE);
498 if ((++preempt & PREEMPT_MASK) == 0) {
503 ObtainReadLock(&afs_xvcache);
504 if (vcachegen != lvcachegen) {
505 ReleaseReadLock(&afs_xvcache);
509 ReleaseReadLock(&afs_xvcache);
515 afs_vget(OSI_VFS_DECL(afsp), vnode_t ** avcp, struct fid * fidp)
517 struct VenusFid vfid;
518 struct vrequest treq;
523 #if defined(AFS_SGI64_ENV) && defined(CKPT) && !defined(_R5000_CVT_WAR)
527 OSI_VFS_CONVERT(afsp);
529 AFS_STATCNT(afs_vget);
533 #if defined(AFS_SGI64_ENV) && defined(CKPT) && !defined(_R5000_CVT_WAR)
534 afid2 = (afs_fid2_t *) fidp;
535 if (afid2->af_len == sizeof(afs_fid2_t) - sizeof(afid2->af_len)) {
536 /* It's a checkpoint restart fid. */
537 tcell = afs_GetCellByIndex(afid2->af_cell, READ_LOCK);
542 vfid.Cell = tcell->cellNum;
543 afs_PutCell(tcell, READ_LOCK);
544 vfid.Fid.Volume = afid2->af_volid;
545 vfid.Fid.Vnode = afid2->af_vno;
546 vfid.Fid.Unique = afid2->af_uniq;
548 if (code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
551 (vnode_t *) afs_GetVCache(&vfid, &treq, NULL, (struct vcache *)0);
559 if (code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
561 code = afs_osi_vget((struct vcache **)avcp, fidp, &treq);
564 afs_Trace3(afs_iclSetp, CM_TRACE_VGET, ICL_TYPE_POINTER, *avcp,
565 ICL_TYPE_INT32, treq.uid, ICL_TYPE_FID, &vfid);
566 code = afs_CheckCode(code, &treq, 42);
571 #ifdef MP /* locked versions of vfs operations. */
573 /* wrappers for vfs calls */
575 #define AFS_MP_VFS_ARG(A) bhv_desc_t A
577 #define AFS_MP_VFS_ARG(A) struct vfs A
581 mp_afs_mount(struct vfs *a, struct vnode *b, struct mounta *c,
589 rv = afs_lockedvfsops.vfs_mount(a, b, c, d
599 mp_afs_unmount(AFS_MP_VFS_ARG(*a), int b, struct cred *c)
603 rv = afs_lockedvfsops.vfs_unmount(a, b, c);
609 mp_afs_root(AFS_MP_VFS_ARG(*a), struct vnode **b)
613 rv = afs_lockedvfsops.vfs_root(a, b);
619 mp_afs_statvfs(AFS_MP_VFS_ARG(*a), struct statvfs *b, struct vnode *c)
623 rv = afs_lockedvfsops.vfs_statvfs(a, b, c);
629 mp_afs_sync(AFS_MP_VFS_ARG(*a),
639 rv = afs_lockedvfsops.vfs_sync(a, b, c);
645 mp_afs_vget(AFS_MP_VFS_ARG(*a), struct vnode **b, struct fid *c)
649 rv = afs_lockedvfsops.vfs_vget(a, b, c);
654 struct vfsops Afs_vfsops = {
657 BHV_IDENTITY_INIT_POSITION(VFS_POSITION_BASE),
664 fs_nosys, /* rootinit */
665 fs_nosys, /* mntupdate */
673 fs_nosys, /* mountroot */
675 fs_nosys, /* realvfsops */
676 fs_import, /* import */
677 fs_nosys, /* quotactl */
679 fs_nosys, /* swapvp */