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
14 * afs_StoreOnLastReference
20 #include <afsconfig.h>
21 #include "afs/param.h"
25 #include "afs/sysincludes.h" /* Standard vendor system headers */
26 #include "afsincludes.h" /* Afs-based standard headers */
27 #include "afs/afs_stats.h" /* statistics */
28 #include "afs/afs_cbqueue.h"
29 #include "afs/nfsclient.h"
30 #include "afs/afs_osidnlc.h"
33 extern unsigned char *afs_indexFlags;
35 /* Called by all write-on-close routines: regular afs_close,
36 * store via background daemon and store via the
37 * afs_FlushActiveVCaches routine (when CCORE is on).
38 * avc->lock must be write-locked.
40 int afs_StoreOnLastReference(register struct vcache *avc, register struct vrequest *treq)
44 AFS_STATCNT(afs_StoreOnLastReference);
45 /* if CCore flag is set, we clear it and do the extra decrement
46 * ourselves now. If we're called by the CCore clearer, the CCore
47 * flag will already be clear, so we don't have to worry about
48 * clearing it twice. */
49 if (avc->states & CCore) {
50 avc->states &= ~CCore;
51 #if defined(AFS_SGI_ENV)
52 osi_Assert(avc->opens > 0 && avc->execsOrWriters > 0);
54 /* WARNING: Our linux cm code treats the execsOrWriters counter differently
55 * depending on the flags the file was opened with. So, if you make any
56 * changes to the way the execsOrWriters flag is handled check with the
59 avc->execsOrWriters--;
60 AFS_RELE(AFSTOV(avc)); /* VN_HOLD at set CCore(afs_FakeClose)*/
61 crfree((struct AFS_UCRED *)avc->linkData); /* "crheld" in afs_FakeClose */
64 /* Now, send the file back. Used to require 0 writers left, but now do
65 * it on every close for write, since two closes in a row are harmless
66 * since first will clean all chunks, and second will be noop. Note that
67 * this will also save confusion when someone keeps a file open
68 * inadvertently, since with old system, writes to the server would never
71 code = afs_StoreAllSegments(avc, treq, AFS_LASTSTORE/*!sync-to-disk*/);
73 * We have to do these after the above store in done: in some systems like
74 * aix they'll need to flush all the vm dirty pages to the disk via the
75 * strategy routine. During that all procedure (done under no avc locks)
76 * opens, refcounts would be zero, since it didn't reach the afs_{rd,wr}
77 * routines which means the vcache is a perfect candidate for flushing!
79 #if defined(AFS_SGI_ENV)
80 osi_Assert(avc->opens > 0 && avc->execsOrWriters > 0);
83 avc->execsOrWriters--;
89 int afs_MemWrite(register struct vcache *avc, struct uio *auio, int aio,
90 struct AFS_UCRED *acred, int noLock)
92 afs_size_t totalLength;
93 afs_size_t transferLength;
95 afs_size_t offset, len;
96 afs_int32 tlen, trimlen;
99 register struct dcache *tdc;
105 struct iovec *tvec; /* again, should have define */
106 register afs_int32 code;
107 struct vrequest treq;
109 AFS_STATCNT(afs_MemWrite);
111 return avc->vc_error;
113 startDate = osi_Time();
114 if ((code = afs_InitReq(&treq, acred))) return code;
115 /* otherwise we read */
116 totalLength = auio->afsio_resid;
117 filePos = auio->afsio_offset;
120 afs_Trace4(afs_iclSetp, CM_TRACE_WRITE, ICL_TYPE_POINTER, avc,
121 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(filePos),
122 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(totalLength),
123 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
125 afs_MaybeWakeupTruncateDaemon();
126 ObtainWriteLock(&avc->lock,126);
128 #if defined(AFS_SGI_ENV)
132 * afs_xwrite handles setting m.Length
133 * and handles APPEND mode.
134 * Since we are called via strategy, we need to trim the write to
135 * the actual size of the file
137 osi_Assert(filePos <= avc->m.Length);
138 diff = avc->m.Length - filePos;
139 auio->afsio_resid = MIN(totalLength, diff);
140 totalLength = auio->afsio_resid;
143 if (aio & IO_APPEND) {
144 /* append mode, start it at the right spot */
145 #if defined(AFS_SUN56_ENV)
146 auio->uio_loffset = 0;
148 filePos = auio->afsio_offset = avc->m.Length;
152 * Note that we use startDate rather than calling osi_Time() here.
153 * This is to avoid counting lock-waiting time in file date (for ranlib).
155 avc->m.Date = startDate;
157 #if defined(AFS_HPUX_ENV) || defined(AFS_GFS_ENV)
158 #if defined(AFS_HPUX101_ENV)
159 if ((totalLength + filePos) >> 9 > (p_rlimit(u.u_procp))[RLIMIT_FSIZE].rlim_cur) {
162 if ((totalLength + filePos) >> 9 > u.u_rlimit[RLIMIT_FSIZE].rlim_cur) {
164 if (totalLength + filePos > u.u_rlimit[RLIMIT_FSIZE].rlim_cur) {
168 ReleaseWriteLock(&avc->lock);
172 #ifdef AFS_VM_RDWR_ENV
174 * If write is implemented via VM, afs_FakeOpen() is called from the
175 * high-level write op.
177 if (avc->execsOrWriters <= 0) {
178 printf("WARNING: afs_ufswr vp=%x, exOrW=%d\n", avc, avc->execsOrWriters);
183 avc->states |= CDirty;
184 tvec = (struct iovec *) osi_AllocSmallSpace(sizeof(struct iovec));
185 while (totalLength > 0) {
186 /* Read the cached info. If we call GetDCache while the cache
187 * truncate daemon is running we risk overflowing the disk cache.
188 * Instead we check for an existing cache slot. If we cannot
189 * find an existing slot we wait for the cache to drain
190 * before calling GetDCache.
193 tdc = afs_FindDCache(avc, filePos);
194 if (tdc) ObtainWriteLock(&tdc->lock, 653);
195 } else if (afs_blocksUsed > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) {
196 tdc = afs_FindDCache(avc, filePos);
198 ObtainWriteLock(&tdc->lock, 654);
199 if (!hsame(tdc->f.versionNo, avc->m.DataVersion) ||
200 (tdc->dflags & DFFetching)) {
201 ReleaseWriteLock(&tdc->lock);
207 afs_MaybeWakeupTruncateDaemon();
208 while (afs_blocksUsed >
209 (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) {
210 ReleaseWriteLock(&avc->lock);
211 if (afs_blocksUsed - afs_blocksDiscarded >
212 (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) {
213 afs_WaitForCacheDrain = 1;
214 afs_osi_Sleep(&afs_WaitForCacheDrain);
216 afs_MaybeFreeDiscardedDCache();
217 afs_MaybeWakeupTruncateDaemon();
218 ObtainWriteLock(&avc->lock,506);
220 avc->states |= CDirty;
221 tdc = afs_GetDCache(avc, filePos, &treq, &offset, &len, 4);
222 if (tdc) ObtainWriteLock(&tdc->lock, 655);
225 tdc = afs_GetDCache(avc, filePos, &treq, &offset, &len, 4);
226 if (tdc) ObtainWriteLock(&tdc->lock, 656);
232 if (!(afs_indexFlags[tdc->index] & IFDataMod)) {
233 afs_stats_cmperf.cacheCurrDirtyChunks++;
234 afs_indexFlags[tdc->index] |= IFDataMod; /* so it doesn't disappear */
236 if (!(tdc->f.states & DWriting)) {
237 /* don't mark entry as mod if we don't have to */
238 tdc->f.states |= DWriting;
239 tdc->dflags |= DFEntryMod;
241 len = totalLength; /* write this amount by default */
242 offset = filePos - AFS_CHUNKTOBASE(tdc->f.chunk);
243 max = AFS_CHUNKTOSIZE(tdc->f.chunk); /* max size of this chunk */
244 if (max <= len + offset) { /*if we'd go past the end of this chunk */
245 /* it won't all fit in this chunk, so write as much
249 /* mung uio structure to be right for this transfer */
250 afsio_copy(auio, &tuio, tvec);
252 afsio_trim(&tuio, trimlen);
253 tuio.afsio_offset = offset;
255 code = afs_MemWriteUIO(tdc->f.inode, &tuio);
257 void *mep; /* XXX in prototype world is struct memCacheEntry * */
259 ZapDCE(tdc); /* bad data */
260 mep = afs_MemCacheOpen(tdc->f.inode);
261 afs_MemCacheTruncate(mep, 0);
262 afs_MemCacheClose(mep);
263 afs_stats_cmperf.cacheCurrDirtyChunks--;
264 afs_indexFlags[tdc->index] &= ~IFDataMod; /* so it does disappear */
265 ReleaseWriteLock(&tdc->lock);
269 /* otherwise we've written some, fixup length, etc and continue with next seg */
270 len = len - tuio.afsio_resid; /* compute amount really transferred */
272 afsio_skip(auio, tlen); /* advance auio over data written */
273 /* compute new file size */
274 if (offset + len > tdc->f.chunkBytes) {
275 afs_int32 tlength = offset+len;
276 afs_AdjustSize(tdc, tlength);
279 transferLength += len;
281 #if defined(AFS_SGI_ENV)
282 /* afs_xwrite handles setting m.Length */
283 osi_Assert(filePos <= avc->m.Length);
285 if (filePos > avc->m.Length) {
286 afs_Trace4(afs_iclSetp, CM_TRACE_SETLENGTH,
287 ICL_TYPE_STRING, __FILE__,
288 ICL_TYPE_LONG, __LINE__,
289 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
290 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(filePos));
291 avc->m.Length = filePos;
294 ReleaseWriteLock(&tdc->lock);
296 #if !defined(AFS_VM_RDWR_ENV)
298 * If write is implemented via VM, afs_DoPartialWrite() is called from
299 * the high-level write op.
302 code = afs_DoPartialWrite(avc, &treq);
310 #ifndef AFS_VM_RDWR_ENV
311 afs_FakeClose(avc, acred);
313 if (error && !avc->vc_error)
314 avc->vc_error = error;
316 ReleaseWriteLock(&avc->lock);
317 osi_FreeSmallSpace(tvec);
319 /* next, on GFS systems, we update g_size so that lseek's relative to EOF will
320 work. GFS is truly a poorly-designed interface! */
321 afs_gfshack((struct gnode *) avc);
323 error = afs_CheckCode(error, &treq, 6);
328 /* called on writes */
329 int afs_UFSWrite(register struct vcache *avc, struct uio *auio,
330 int aio, struct AFS_UCRED *acred, int noLock)
332 afs_size_t totalLength;
333 afs_size_t transferLength;
335 afs_size_t offset, len;
340 register struct dcache *tdc;
346 struct iovec *tvec; /* again, should have define */
347 struct osi_file *tfile;
348 register afs_int32 code;
349 struct vrequest treq;
351 AFS_STATCNT(afs_UFSWrite);
353 return avc->vc_error;
355 startDate = osi_Time();
356 if ((code = afs_InitReq(&treq, acred))) return code;
357 /* otherwise we read */
358 totalLength = auio->afsio_resid;
359 filePos = auio->afsio_offset;
362 afs_Trace4(afs_iclSetp, CM_TRACE_WRITE, ICL_TYPE_POINTER, avc,
363 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(filePos),
364 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(totalLength),
365 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
367 afs_MaybeWakeupTruncateDaemon();
368 ObtainWriteLock(&avc->lock,556);
370 #if defined(AFS_SGI_ENV)
374 * afs_xwrite handles setting m.Length
375 * and handles APPEND mode.
376 * Since we are called via strategy, we need to trim the write to
377 * the actual size of the file
379 osi_Assert(filePos <= avc->m.Length);
380 diff = avc->m.Length - filePos;
381 auio->afsio_resid = MIN(totalLength, diff);
382 totalLength = auio->afsio_resid;
385 if (aio & IO_APPEND) {
386 /* append mode, start it at the right spot */
387 #if defined(AFS_SUN56_ENV)
388 auio->uio_loffset = 0;
390 filePos = auio->afsio_offset = avc->m.Length;
394 * Note that we use startDate rather than calling osi_Time() here.
395 * This is to avoid counting lock-waiting time in file date (for ranlib).
397 avc->m.Date = startDate;
399 #if defined(AFS_HPUX_ENV) || defined(AFS_GFS_ENV)
400 #if defined(AFS_HPUX101_ENV)
401 if ((totalLength + filePos) >> 9 > p_rlimit(u.u_procp)[RLIMIT_FSIZE].rlim_cur) {
404 if ((totalLength + filePos) >> 9 > u.u_rlimit[RLIMIT_FSIZE].rlim_cur) {
406 if (totalLength + filePos > u.u_rlimit[RLIMIT_FSIZE].rlim_cur) {
410 ReleaseWriteLock(&avc->lock);
414 #ifdef AFS_VM_RDWR_ENV
416 * If write is implemented via VM, afs_FakeOpen() is called from the
417 * high-level write op.
419 if (avc->execsOrWriters <= 0) {
420 printf("WARNING: afs_ufswr vcp=%x, exOrW=%d\n", avc, avc->execsOrWriters);
425 avc->states |= CDirty;
426 tvec = (struct iovec *) osi_AllocSmallSpace(sizeof(struct iovec));
427 while (totalLength > 0) {
429 * The following lines are necessary because afs_GetDCache with
430 * flag == 4 expects the length field to be filled. It decides
431 * from this whether it's necessary to fetch data into the chunk
432 * before writing or not (when the whole chunk is overwritten!).
434 len = totalLength; /* write this amount by default */
435 /* read the cached info */
437 tdc = afs_FindDCache(avc, filePos);
438 if (tdc) ObtainWriteLock(&tdc->lock, 657);
439 } else if (afs_blocksUsed > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) {
440 tdc = afs_FindDCache(avc, filePos);
442 ObtainWriteLock(&tdc->lock, 658);
443 if (!hsame(tdc->f.versionNo, avc->m.DataVersion) ||
444 (tdc->dflags & DFFetching)) {
445 ReleaseWriteLock(&tdc->lock);
451 afs_MaybeWakeupTruncateDaemon();
452 while (afs_blocksUsed >
453 (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) {
454 ReleaseWriteLock(&avc->lock);
455 if (afs_blocksUsed - afs_blocksDiscarded >
456 (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) {
457 afs_WaitForCacheDrain = 1;
458 afs_osi_Sleep(&afs_WaitForCacheDrain);
460 afs_MaybeFreeDiscardedDCache();
461 afs_MaybeWakeupTruncateDaemon();
462 ObtainWriteLock(&avc->lock,509);
464 avc->states |= CDirty;
465 tdc = afs_GetDCache(avc, filePos, &treq, &offset, &len, 4);
466 if (tdc) ObtainWriteLock(&tdc->lock, 659);
469 tdc = afs_GetDCache(avc, filePos, &treq, &offset, &len, 4);
470 if (tdc) ObtainWriteLock(&tdc->lock, 660);
476 if (!(afs_indexFlags[tdc->index] & IFDataMod)) {
477 afs_stats_cmperf.cacheCurrDirtyChunks++;
478 afs_indexFlags[tdc->index] |= IFDataMod; /* so it doesn't disappear */
480 if (!(tdc->f.states & DWriting)) {
481 /* don't mark entry as mod if we don't have to */
482 tdc->f.states |= DWriting;
483 tdc->dflags |= DFEntryMod;
485 tfile = (struct osi_file *)osi_UFSOpen(tdc->f.inode);
486 len = totalLength; /* write this amount by default */
487 offset = filePos - AFS_CHUNKTOBASE(tdc->f.chunk);
488 max = AFS_CHUNKTOSIZE(tdc->f.chunk); /* max size of this chunk */
489 if (max <= len + offset) { /*if we'd go past the end of this chunk */
490 /* it won't all fit in this chunk, so write as much
494 /* mung uio structure to be right for this transfer */
495 afsio_copy(auio, &tuio, tvec);
497 afsio_trim(&tuio, trimlen);
498 tuio.afsio_offset = offset;
502 code = VNOP_RDWR(tfile->vnode, UIO_WRITE, FWRITE, &tuio, NULL, NULL, NULL, &afs_osi_cred);
506 code = VNOP_RDWR(tfile->vnode, UIO_WRITE, FWRITE, &tuio, NULL, NULL);
508 code = VNOP_RDWR(tfile->vnode, UIO_WRITE, FWRITE, (off_t)&offset, &tuio, NULL, NULL, -1);
510 #endif /* AFS_AIX41_ENV */
511 #else /* AFS_AIX_ENV */
514 VOP_RWLOCK(tfile->vnode, 1);
515 code = VOP_WRITE(tfile->vnode, &tuio, 0, &afs_osi_cred);
516 VOP_RWUNLOCK(tfile->vnode, 1);
518 if (code == ENOSPC) afs_warnuser("\n\n\n*** Cache partition is full - decrease cachesize!!! ***\n\n\n");
520 #if defined(AFS_SGI_ENV)
522 avc->states |= CWritingUFS;
523 AFS_VOP_RWLOCK(tfile->vnode, VRWLOCK_WRITE);
524 AFS_VOP_WRITE(tfile->vnode, &tuio, IO_ISLOCKED, &afs_osi_cred, code);
525 AFS_VOP_RWUNLOCK(tfile->vnode, VRWLOCK_WRITE);
526 avc->states &= ~CWritingUFS;
531 struct ucred *tmpcred = u.u_cred;
532 u.u_cred = &afs_osi_cred;
533 tuio.uio_rw = UIO_WRITE;
535 VOP_WRITE(tfile->vnode, &tuio, 0, &afs_osi_cred, code);
539 #else /* AFS_OSF_ENV */
540 #if defined(AFS_HPUX100_ENV)
543 code = VOP_RDWR(tfile->vnode, &tuio, UIO_WRITE, 0, &afs_osi_cred);
548 tuio.uio_fpflags &= ~FSYNCIO; /* don't do sync io */
550 #if defined(AFS_LINUX20_ENV)
552 code = osi_file_uio_rdwr(tfile, &tuio, UIO_WRITE);
555 #if defined(AFS_DARWIN_ENV)
557 VOP_LOCK(tfile->vnode, LK_EXCLUSIVE, current_proc());
558 code = VOP_WRITE(tfile->vnode, &tuio, 0, &afs_osi_cred);
559 VOP_UNLOCK(tfile->vnode, 0, current_proc());
562 #if defined(AFS_XBSD_ENV)
564 VOP_LOCK(tfile->vnode, LK_EXCLUSIVE, curproc);
565 code = VOP_WRITE(tfile->vnode, &tuio, 0, &afs_osi_cred);
566 VOP_UNLOCK(tfile->vnode, 0, curproc);
569 code = VOP_RDWR(tfile->vnode, &tuio, UIO_WRITE, 0, &afs_osi_cred);
570 #endif /* AFS_XBSD_ENV */
571 #endif /* AFS_DARWIN_ENV */
572 #endif /* AFS_LINUX20_ENV */
573 #endif /* AFS_HPUX100_ENV */
574 #endif /* AFS_OSF_ENV */
575 #endif /* AFS_SGI_ENV */
576 #endif /* AFS_SUN5_ENV */
577 #endif /* AFS_AIX41_ENV */
580 ZapDCE(tdc); /* bad data */
581 osi_UFSTruncate(tfile,0); /* fake truncate the segment */
582 afs_AdjustSize(tdc, 0); /* sets f.chunkSize to 0 */
583 afs_stats_cmperf.cacheCurrDirtyChunks--;
584 afs_indexFlags[tdc->index] &= ~IFDataMod; /* so it does disappear */
585 afs_CFileClose(tfile);
586 ReleaseWriteLock(&tdc->lock);
590 /* otherwise we've written some, fixup length, etc and continue with next seg */
591 len = len - tuio.afsio_resid; /* compute amount really transferred */
593 afsio_skip(auio, tlen); /* advance auio over data written */
594 /* compute new file size */
595 if (offset + len > tdc->f.chunkBytes) {
596 afs_int32 tlength = offset+len;
597 afs_AdjustSize(tdc, tlength);
600 transferLength += len;
602 #if defined(AFS_SGI_ENV)
603 /* afs_xwrite handles setting m.Length */
604 osi_Assert(filePos <= avc->m.Length);
606 if (filePos > avc->m.Length) {
607 afs_Trace4(afs_iclSetp, CM_TRACE_SETLENGTH,
608 ICL_TYPE_STRING, __FILE__,
609 ICL_TYPE_LONG, __LINE__,
610 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
611 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(filePos));
612 avc->m.Length = filePos;
616 ReleaseWriteLock(&tdc->lock);
618 #if !defined(AFS_VM_RDWR_ENV)
620 * If write is implemented via VM, afs_DoPartialWrite() is called from
621 * the high-level write op.
624 code = afs_DoPartialWrite(avc, &treq);
632 #ifndef AFS_VM_RDWR_ENV
633 afs_FakeClose(avc, acred);
635 error = afs_CheckCode(error, &treq, 7);
636 /* This set is here so we get the CheckCode. */
637 if (error && !avc->vc_error)
638 avc->vc_error = error;
640 ReleaseWriteLock(&avc->lock);
641 osi_FreeSmallSpace(tvec);
643 /* next, on GFS systems, we update g_size so that lseek's relative to EOF will
644 work. GFS is truly a poorly-designed interface! */
645 afs_gfshack((struct gnode *) avc);
647 #ifndef AFS_VM_RDWR_ENV
649 * If write is implemented via VM, afs_fsync() is called from the high-level
652 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
653 if (noLock && (aio & IO_SYNC)) {
656 /* On hpux on synchronous writes syncio will be set to IO_SYNC. If
657 * we're doing them because the file was opened with O_SYNCIO specified,
658 * we have to look in the u area. No single mechanism here!!
660 if (noLock && ((aio & IO_SYNC) | (auio->uio_fpflags & FSYNCIO))) {
662 if (noLock && (aio & FSYNC)) {
665 if (!AFS_NFSXLATORREQ(acred))
666 afs_fsync(avc, acred);
672 /* do partial write if we're low on unmodified chunks */
673 int afs_DoPartialWrite(register struct vcache *avc, struct vrequest *areq)
675 register afs_int32 code;
677 if (afs_stats_cmperf.cacheCurrDirtyChunks <= afs_stats_cmperf.cacheMaxDirtyChunks)
678 return 0; /* nothing to do */
679 /* otherwise, call afs_StoreDCache (later try to do this async, if possible) */
680 afs_Trace2(afs_iclSetp, CM_TRACE_PARTIALWRITE, ICL_TYPE_POINTER, avc,
681 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
682 #if defined(AFS_SUN5_ENV)
683 code = afs_StoreAllSegments(avc, areq, AFS_ASYNC | AFS_VMSYNC_INVAL);
685 code = afs_StoreAllSegments(avc, areq, AFS_ASYNC);
692 #if !defined (AFS_AIX_ENV) && !defined (AFS_HPUX_ENV) && !defined (AFS_SUN5_ENV) && !defined(AFS_SGI_ENV) && !defined(AFS_LINUX20_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_XBSD_ENV)
694 #define vno_close(X) vn_close((X), 0, NOCRED)
695 #elif defined(AFS_DUX40_ENV)
696 #define vno_close vn_close
698 /* We don't need this for AIX since:
699 * (1) aix doesn't use fileops and it call close directly intead
700 * (where the unlocking should be done) and
701 * (2) temporarily, the aix lockf isn't supported yet.
703 * this stupid routine is used to release the flocks held on a
704 * particular file descriptor. Sun doesn't pass file descr. info
705 * through to the vnode layer, and yet we must unlock flocked files
706 * on the *appropriate* (not first, as in System V) close call. Thus
708 * How does this code get invoked? The afs AFS_FLOCK plugs in the new afs
709 * file ops structure into any afs file when it gets flocked.
710 * N.B: Intercepting close syscall doesn't trap aborts or exit system
713 int afs_closex(register struct file *afd)
715 struct vrequest treq;
720 struct afs_fakestat_state fakestat;
722 AFS_STATCNT(afs_closex);
723 /* setup the credentials */
724 if ((code = afs_InitReq(&treq, u.u_cred))) return code;
725 afs_InitFakeStat(&fakestat);
728 /* we're the last one. If we're an AFS vnode, clear the flags,
729 * close the file and release the lock when done. Otherwise, just
730 * let the regular close code work. */
731 if (afd->f_type == DTYPE_VNODE) {
732 tvc = VTOAFS(afd->f_data);
733 if (IsAfsVnode(AFSTOV(tvc))) {
734 code = afs_EvalFakeStat(&tvc, &fakestat, &treq);
736 afs_PutFakeStat(&fakestat);
739 VN_HOLD(AFSTOV(tvc));
740 flags = afd->f_flag & (FSHLOCK | FEXLOCK);
741 afd->f_flag &= ~(FSHLOCK | FEXLOCK);
742 code = vno_close(afd);
744 #if defined(AFS_SGI_ENV) || defined(AFS_OSF_ENV) || defined(AFS_SUN_ENV) && !defined(AFS_SUN5_ENV)
745 HandleFlock(tvc, LOCK_UN, &treq,
746 u.u_procp->p_pid, 1/*onlymine*/);
748 HandleFlock(tvc, LOCK_UN, &treq, 0, 1/*onlymine*/);
751 grele((struct gnode *) tvc);
753 AFS_RELE(AFSTOV(tvc));
758 /* now, if close not done, do it */
760 code = vno_close(afd);
762 afs_PutFakeStat(&fakestat);
763 return code; /* return code from vnode layer */
768 /* handle any closing cleanup stuff */
770 afs_close(OSI_VC_ARG(avc), aflags, lastclose,
771 #if !defined(AFS_SGI65_ENV)
775 #if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV)
779 lastclose_t lastclose;
780 #if !defined(AFS_SGI65_ENV)
782 #if defined(AFS_SGI64_ENV)
787 #if defined(AFS_SUN_ENV) || defined(AFS_SUN5_ENV)
789 afs_close(OSI_VC_ARG(avc), aflags, count, offset, acred)
792 afs_close(OSI_VC_ARG(avc), aflags, count, acred)
796 afs_close(OSI_VC_ARG(avc), aflags, acred)
801 struct AFS_UCRED *acred;
803 register afs_int32 code;
804 register struct brequest *tb;
805 struct vrequest treq;
809 struct afs_fakestat_state fakestat;
812 AFS_STATCNT(afs_close);
813 afs_Trace2(afs_iclSetp, CM_TRACE_CLOSE, ICL_TYPE_POINTER, avc,
814 ICL_TYPE_INT32, aflags);
815 code = afs_InitReq(&treq, acred);
816 if (code) return code;
817 afs_InitFakeStat(&fakestat);
818 code = afs_EvalFakeStat(&avc, &fakestat, &treq);
820 afs_PutFakeStat(&fakestat);
824 if (avc->flockCount) {
825 HandleFlock(avc, LOCK_UN, &treq, 0, 1/*onlymine*/);
828 #if defined(AFS_SGI_ENV)
830 afs_PutFakeStat(&fakestat);
834 #if defined(AFS_SUN_ENV) || defined(AFS_SGI_ENV)
836 /* The vfs layer may call this repeatedly with higher "count"; only on the last close (i.e. count = 1) we should actually proceed with the close. */
837 afs_PutFakeStat(&fakestat);
843 #if defined(AFS_SGI_ENV)
844 /* unlock any locks for pid - could be wrong for child .. */
845 AFS_RWLOCK((vnode_t *)avc, VRWLOCK_WRITE);
847 get_current_flid(&flid);
848 cleanlocks((vnode_t *)avc, flid.fl_pid, flid.fl_sysid);
849 HandleFlock(avc, LOCK_UN, &treq, flid.fl_pid, 1/*onlymine*/);
852 cleanlocks((vnode_t *)avc, flp);
853 #else /* AFS_SGI64_ENV */
854 cleanlocks((vnode_t *)avc, u.u_procp->p_epid, u.u_procp->p_sysid);
855 #endif /* AFS_SGI64_ENV */
856 HandleFlock(avc, LOCK_UN, &treq, OSI_GET_CURRENT_PID(), 1/*onlymine*/);
857 #endif /* AFS_SGI65_ENV */
858 /* afs_chkpgoob will drop and re-acquire the global lock. */
859 afs_chkpgoob(&avc->v, btoc(avc->m.Length));
861 if (avc->flockCount) { /* Release Lock */
862 #if defined(AFS_OSF_ENV) || defined(AFS_SUN_ENV)
863 HandleFlock(avc, LOCK_UN, &treq, u.u_procp->p_pid, 1/*onlymine*/);
865 HandleFlock(avc, LOCK_UN, &treq, 0, 1/*onlymine*/);
870 if (aflags & (FWRITE | FTRUNC)) {
872 /* do it yourself if daemons are all busy */
873 ObtainWriteLock(&avc->lock,124);
874 code = afs_StoreOnLastReference(avc, &treq);
875 ReleaseWriteLock(&avc->lock);
876 #if defined(AFS_SGI_ENV)
877 AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE);
881 #if defined(AFS_SGI_ENV)
882 AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE);
884 /* at least one daemon is idle, so ask it to do the store.
885 Also, note that we don't lock it any more... */
886 tb = afs_BQueue(BOP_STORE, avc, 0, 1, acred,
887 (afs_size_t) acred->cr_uid, (afs_size_t) 0,
889 /* sleep waiting for the store to start, then retrieve error code */
890 while ((tb->flags & BUVALID) == 0) {
898 /* VNOVNODE is "acceptable" error code from close, since
899 may happen when deleting a file on another machine while
900 it is open here. We do the same for ENOENT since in afs_CheckCode we map VNOVNODE -> ENOENT */
901 if (code == VNOVNODE || code == ENOENT)
904 /* Ensure last closer gets the error. If another thread caused
905 * DoPartialWrite and this thread does not actually store the data,
906 * it may not see the quota error.
908 ObtainWriteLock(&avc->lock,406);
911 osi_ReleaseVM(avc, acred);
913 code = avc->vc_error;
916 ReleaseWriteLock(&avc->lock);
918 /* some codes merit specific complaint */
920 afs_warnuser("afs: failed to store file (network problems)\n");
923 else if (code == ENOSPC) {
924 afs_warnuser("afs: failed to store file (over quota or partition full)\n");
927 else if (code == ENOSPC) {
928 afs_warnuser("afs: failed to store file (partition full)\n");
930 else if (code == EDQUOT) {
931 afs_warnuser("afs: failed to store file (over quota)\n");
935 afs_warnuser("afs: failed to store file (%d)\n", code);
937 /* finally, we flush any text pages lying around here */
942 #if defined(AFS_SGI_ENV)
943 AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE);
944 osi_Assert(avc->opens > 0);
946 /* file open for read */
947 ObtainWriteLock(&avc->lock, 411);
950 osi_ReleaseVM(avc, acred);
952 code = avc->vc_error;
956 ReleaseWriteLock(&avc->lock);
959 if ((VREFCOUNT(avc) <= 2) && (avc->states & CUnlinked)) {
960 afs_remunlink(avc, 1); /* ignore any return code */
963 afs_PutFakeStat(&fakestat);
964 code = afs_CheckCode(code, &treq, 5);
971 afs_fsync(avc, fflags, acred, waitfor)
974 #else /* AFS_OSF_ENV */
975 #if defined(AFS_SGI_ENV) || defined(AFS_SUN53_ENV)
976 afs_fsync(OSI_VC_ARG(avc), flag, acred
982 afs_fsync(avc, acred)
986 struct AFS_UCRED *acred;
987 #if defined(AFS_SGI_ENV) || defined(AFS_SUN53_ENV)
994 register afs_int32 code;
995 struct vrequest treq;
999 return avc->vc_error;
1001 #if defined(AFS_SUN5_ENV)
1002 /* back out if called from NFS server */
1003 if (curthread->t_flag & T_DONTPEND)
1007 AFS_STATCNT(afs_fsync);
1008 afs_Trace1(afs_iclSetp, CM_TRACE_FSYNC, ICL_TYPE_POINTER, avc);
1009 if ((code = afs_InitReq(&treq, acred))) return code;
1011 #if defined(AFS_SGI_ENV)
1012 AFS_RWLOCK((vnode_t *)avc, VRWLOCK_WRITE);
1013 if (flag & FSYNC_INVAL)
1014 osi_VM_FSyncInval(avc);
1015 #endif /* AFS_SGI_ENV */
1017 ObtainSharedLock(&avc->lock,18);
1019 if (avc->execsOrWriters > 0) {
1020 /* put the file back */
1021 UpgradeSToWLock(&avc->lock,41);
1022 code = afs_StoreAllSegments(avc, &treq, AFS_SYNC);
1023 ConvertWToSLock(&avc->lock);
1026 #if defined(AFS_SGI_ENV)
1027 AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE);
1028 if (code == VNOVNODE) {
1029 /* syncing an unlinked file! - non-informative to pass an errno
1030 * 102 (== VNOVNODE) to user
1036 code = afs_CheckCode(code, &treq, 33);
1037 ReleaseSharedLock(&avc->lock);