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
38 #include "sys/mload.h"
39 char *Afs_mversion = M_VERSION;
41 extern int (*setgroupsp) (int, gid_t *);
42 extern struct afs_lock afs_xvcache;
43 extern int idbg_afsuser();
44 extern void afs_mpservice(void *);
47 * AFS fs initialization - we also plug system calls here
49 #define NewSystemCall(n,f,a) \
50 syscallsw[ABI_IRIX5].sc_sysent[(n)-1000].sy_narg = a; \
51 syscallsw[ABI_IRIX5].sc_sysent[(n)-1000].sy_call = f; \
52 syscallsw[ABI_IRIX5].sc_sysent[(n)-1000].sy_flags = 0;
53 extern struct vfsops Afs_vfsops, *afs_vfsopsp;
54 extern struct vnodeops Afs_vnodeops, *afs_vnodeopsp;
55 extern void (*afsidestroyp) (struct inode *);
56 extern void afsidestroy(struct inode *);
57 extern int (*idbg_prafsnodep) (vnode_t *);
58 extern int (*idbg_afsvfslistp) (void);
59 extern int idbg_prafsnode(vnode_t *);
60 extern int idbg_afsvfslist(void);
64 Afs_init(struct vfssw *vswp, int fstype)
66 extern int Afs_syscall(), Afs_xsetgroups(), afs_pioctl(), afs_setpag();
67 extern int icreate(), iopen(), iinc(), idec();
68 #ifdef AFS_SGI_XFS_IOPS_ENV
71 extern int iread(), iwrite();
78 #ifdef AFS_SGI_VNODE_GLUE
79 /* Synchronize doing NUMA test. */
80 mutex_init(&afs_init_kern_lock, MUTEX_DEFAULT, "init_kern_lock");
83 * set up pointers from main kernel into us
85 afs_vnodeopsp = &Afs_vnodeops;
86 afs_vfsopsp = &Afs_vfsops;
87 afsidestroyp = afsidestroy;
88 idbg_prafsnodep = idbg_prafsnode;
89 idbg_afsvfslistp = idbg_afsvfslist;
90 NewSystemCall(AFS_SYSCALL, Afs_syscall, 6);
91 NewSystemCall(AFS_PIOCTL, afs_pioctl, 4);
92 NewSystemCall(AFS_SETPAG, afs_setpag, 0);
93 NewSystemCall(AFS_IOPEN, iopen, 3);
94 NewSystemCall(AFS_ICREATE, icreate, 6);
95 NewSystemCall(AFS_IINC, iinc, 3);
96 NewSystemCall(AFS_IDEC, idec, 3);
97 #ifdef AFS_SGI_XFS_IOPS_ENV
98 NewSystemCall(AFS_IOPEN64, iopen64, 4);
100 NewSystemCall(AFS_IREAD, iread, 6);
101 NewSystemCall(AFS_IWRITE, iwrite, 6);
104 /* last replace these */
105 setgroupsp = Afs_xsetgroups;
107 idbg_addfunc("afsuser", idbg_afsuser);
112 extern int afs_mount(), afs_unmount(), afs_root(), afs_statfs();
113 extern int afs_sync(OSI_VFS_DECL(afsp), int flags, struct cred *cr);
114 extern int afs_vget(OSI_VFS_DECL(afsp), vnode_t ** vpp, struct fid *afidp);
116 struct vfsops afs_lockedvfsops =
118 struct vfsops Afs_vfsops =
121 BHV_IDENTITY_INIT_POSITION(VFS_POSITION_BASE),
123 fs_nosys, /* rootinit */
124 fs_nosys, /* mntupdate */
131 fs_nosys, /* mountroot */
132 fs_nosys, /* realvfsops */
133 fs_import, /* import */
134 fs_nosys, /* quotactl */
136 extern struct afs_q VLRU; /*vcache LRU */
138 static bhv_desc_t afs_vfs_bhv;
139 afs_mount(struct vfs *afsp, vnode_t * mvp, struct mounta *uap,
143 AFS_STATCNT(afs_mount);
148 if (mvp->v_type != VDIR)
151 if (afs_globalVFS) { /* Don't allow remounts. */
155 afs_globalVFS = afsp;
156 afsp->vfs_bsize = 8192;
157 afsp->vfs_fsid.val[0] = AFS_VFSMAGIC; /* magic */
158 afsp->vfs_fsid.val[1] = afs_fstype;
159 vfs_insertbhv(afsp, &afs_vfs_bhv, &Afs_vfsops, &afs_vfs_bhv);
160 afsp->vfs_fstype = afs_fstype;
161 afsp->vfs_dev = 0xbabebabe; /* XXX this should be unique */
166 afs_unmount(OSI_VFS_ARG(afsp), flags, cr)
172 vnode_t *vp, *rootvp = NULL;
176 OSI_VFS_CONVERT(afsp);
178 AFS_STATCNT(afs_unmount);
184 * flush all pages from inactive vnodes - return
185 * EBUSY if any still in use
187 ObtainWriteLock(&afs_xvcache, 172);
189 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
192 vp = (vnode_t *) tvc;
193 if (error = afs_FlushVCache(tvc, &fv_slept)) {
194 if (vp->v_flag & VROOT) {
198 ReleaseWriteLock(&afs_xvcache);
208 * rootvp gets lots of ref counts
211 tvc = VTOAFS(rootvp);
212 if (tvc->opens || CheckLock(&tvc->lock) || LockWaiters(&tvc->lock)) {
213 ReleaseWriteLock(&afs_xvcache);
216 ReleaseWriteLock(&afs_xvcache);
219 ObtainWriteLock(&afs_xvcache, 173);
220 afs_FlushVCache(tvc, &fv_slept);
222 ReleaseWriteLock(&afs_xvcache);
224 afs_shutdown(AFS_WARM);
225 VFS_REMOVEBHV(afsp, &afs_vfs_bhv);
231 afs_root(OSI_VFS_ARG(afsp), avpp)
236 struct vrequest treq;
237 struct vcache *tvp = 0;
238 OSI_VFS_CONVERT(afsp);
240 AFS_STATCNT(afs_root);
241 if (afs_globalVp && (afs_globalVp->f.states & CStatd)) {
245 afs_PutVCache(afs_globalVp);
249 if (!(code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
250 && !(code = afs_CheckInit())) {
251 tvp = afs_GetVCache(&afs_rootFid, &treq);
252 /* we really want this to stay around */
261 VN_HOLD(AFSTOV(tvp));
262 s = VN_LOCK(AFSTOV(tvp));
263 AFSTOV(tvp)->v_flag |= VROOT;
264 VN_UNLOCK(AFSTOV(tvp), s);
266 afs_globalVFS = afsp;
270 afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, *avpp,
271 ICL_TYPE_INT32, code);
275 afs_statfs(OSI_VFS_ARG(afsp), abp, avp)
278 struct vnode *avp; /* unused */
280 OSI_VFS_CONVERT(afsp);
282 AFS_STATCNT(afs_statfs);
283 abp->f_bsize = afsp->vfs_bsize;
284 abp->f_frsize = afsp->vfs_bsize;
285 /* Fake a high number below to satisfy programs that use the statfs
286 * call to make sure that there's enough space in the device partition
287 * before storing something there.
289 abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
290 abp->f_ffree = abp->f_favail = AFS_VFS_FAKEFREE;
292 abp->f_fsid = AFS_VFSMAGIC; /* magic */
293 strcpy(abp->f_basetype, AFS_MOUNT_STR);
295 abp->f_namemax = 256;
302 * sync's responsibilities include pushing back DELWRI pages
303 * Things to watch out for:
304 * 1) don't want to hold off new vnodes in the file system
305 * while pushing back pages
306 * 2) since we can deal with un-referenced vndoes need to watch
307 * races with folks who recycle vnodes
309 * SYNC_BDFLUSH - do NOT sleep waiting for an inode - also, when
310 * when pushing DELWRI - only push old ones.
311 * SYNC_PDFLUSH - push v_dpages.
312 * SYNC_ATTR - sync attributes - note that ordering considerations
313 * dictate that we also flush dirty pages
314 * SYNC_WAIT - do synchronouse writes - inode & delwri
315 * SYNC_NOWAIT - start delayed writes.
316 * SYNC_DELWRI - look at inodes w/ delwri pages. Other flags
317 * decide how to deal with them.
318 * SYNC_CLOSE - flush delwri and invalidate others.
319 * SYNC_FSDATA - push fs data (e.g. superblocks)
322 extern afs_int32 vcachegen;
323 #define PREEMPT_MASK 0x7f
327 afs_sync(OSI_VFS_DECL(afsp),
331 /* Why enable the vfs sync operation?? */
332 int error, lasterr, preempt;
335 afs_uint32 lvcachegen;
339 OSI_VFS_CONVERT(afsp);
343 * if not interested in vnodes, skip all this
345 if ((flags & (SYNC_CLOSE | SYNC_DELWRI | SYNC_PDFLUSH)) == 0)
348 ObtainReadLock(&afs_xvcache);
349 for (tq = VLRU.prev; tq != &VLRU; tq = uq) {
352 vp = (vnode_t *) tvc;
354 * Since we push all dirty pages on last close/VOP_INACTIVE
355 * we are only concerned with vnodes with
356 * active reference counts.
359 if (vp->v_count == 0) {
363 if ((flags & SYNC_CLOSE) == 0 && !AFS_VN_DIRTY(vp)) {
369 * ignore vnodes which need no flushing
371 if (flags & SYNC_DELWRI) {
372 if (!AFS_VN_DIRTY(vp)) {
377 else if (flags & SYNC_PDFLUSH) {
378 if (!VN_GET_DPAGES(vp)) {
386 lvcachegen = vcachegen;
387 ReleaseReadLock(&afs_xvcache);
390 * Try to lock rwlock without sleeping. If we can't, we must
393 if (afs_rwlock_nowait(vp, 1) == 0) {
394 if (flags & (SYNC_BDFLUSH | SYNC_PDFLUSH))
397 ObtainReadLock(&afs_xvcache);
398 if (vcachegen != lvcachegen) {
399 ReleaseReadLock(&afs_xvcache);
404 AFS_RWLOCK(vp, VRWLOCK_WRITE);
408 if (flags & SYNC_CLOSE) {
409 PFLUSHINVALVP(vp, (off_t) 0, (off_t) tvc->f.m.Length);
411 else if (flags & SYNC_PDFLUSH) {
412 if (VN_GET_DPAGES(vp)) {
413 pdflush(vp, B_ASYNC);
418 if ((flags & SYNC_DELWRI) && AFS_VN_DIRTY(vp)) {
419 PFLUSHVP(vp, (off_t) tvc->f.m.Length,
420 (flags & SYNC_WAIT) ? 0 : B_ASYNC, error);
424 * Release vp, check error and whether to preempt, and if
425 * we let go of xvcache lock and someone has changed the
426 * VLRU, restart the loop
429 AFS_RWUNLOCK(vp, VRWLOCK_WRITE);
433 if ((++preempt & PREEMPT_MASK) == 0) {
438 ObtainReadLock(&afs_xvcache);
439 if (vcachegen != lvcachegen) {
440 ReleaseReadLock(&afs_xvcache);
444 ReleaseReadLock(&afs_xvcache);
450 afs_vget(OSI_VFS_DECL(afsp), vnode_t ** avcp, struct fid * fidp)
452 struct VenusFid vfid;
453 struct vrequest treq;
458 #if defined(CKPT) && !defined(_R5000_CVT_WAR)
462 OSI_VFS_CONVERT(afsp);
464 AFS_STATCNT(afs_vget);
468 #if defined(CKPT) && !defined(_R5000_CVT_WAR)
469 afid2 = (afs_fid2_t *) fidp;
470 if (afid2->af_len == sizeof(afs_fid2_t) - sizeof(afid2->af_len)) {
471 /* It's a checkpoint restart fid. */
472 tcell = afs_GetCellByIndex(afid2->af_cell, READ_LOCK);
477 vfid.Cell = tcell->cellNum;
478 afs_PutCell(tcell, READ_LOCK);
479 vfid.Fid.Volume = afid2->af_volid;
480 vfid.Fid.Vnode = afid2->af_vno;
481 vfid.Fid.Unique = afid2->af_uniq;
483 if (code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
486 (vnode_t *) afs_GetVCache(&vfid, &treq);
494 if (code = afs_InitReq(&treq, OSI_GET_CURRENT_CRED()))
496 code = afs_osi_vget((struct vcache **)avcp, fidp, &treq);
499 afs_Trace3(afs_iclSetp, CM_TRACE_VGET, ICL_TYPE_POINTER, *avcp,
500 ICL_TYPE_INT32, treq.uid, ICL_TYPE_FID, &vfid);
501 code = afs_CheckCode(code, &treq, 42);
506 #ifdef MP /* locked versions of vfs operations. */
508 /* wrappers for vfs calls */
509 #define AFS_MP_VFS_ARG(A) bhv_desc_t A
512 mp_afs_mount(struct vfs *a, struct vnode *b, struct mounta *c,
518 rv = afs_lockedvfsops.vfs_mount(a, b, c, d
526 mp_afs_unmount(AFS_MP_VFS_ARG(*a), int b, struct cred *c)
530 rv = afs_lockedvfsops.vfs_unmount(a, b, c);
536 mp_afs_root(AFS_MP_VFS_ARG(*a), struct vnode **b)
540 rv = afs_lockedvfsops.vfs_root(a, b);
546 mp_afs_statvfs(AFS_MP_VFS_ARG(*a), struct statvfs *b, struct vnode *c)
550 rv = afs_lockedvfsops.vfs_statvfs(a, b, c);
556 mp_afs_sync(AFS_MP_VFS_ARG(*a),
562 rv = afs_lockedvfsops.vfs_sync(a, b, c);
568 mp_afs_vget(AFS_MP_VFS_ARG(*a), struct vnode **b, struct fid *c)
572 rv = afs_lockedvfsops.vfs_vget(a, b, c);
577 struct vfsops Afs_vfsops = {
578 BHV_IDENTITY_INIT_POSITION(VFS_POSITION_BASE),
580 fs_nosys, /* rootinit */
581 fs_nosys, /* mntupdate */
588 fs_nosys, /* mountroot */
589 fs_nosys, /* realvfsops */
590 fs_import, /* import */
591 fs_nosys, /* quotactl */