/* Copyright (C) 1995, 1989, 1998 Transarc Corporation - All rights reserved */ /* * (C) COPYRIGHT IBM CORPORATION 1987, 1988 * LICENSED MATERIALS - PROPERTY OF IBM */ /* afs_vnop_write.c * * Implements: * afs_UFSWrite * afs_MemWrite * afs_StoreOnLastReference * afs_close * afs_closex * afs_fsync */ #include "../afs/param.h" /* Should be always first */ #include "../afs/sysincludes.h" /* Standard vendor system headers */ #include "../afs/afsincludes.h" /* Afs-based standard headers */ #include "../afs/afs_stats.h" /* statistics */ #include "../afs/afs_cbqueue.h" #include "../afs/nfsclient.h" #include "../afs/afs_osidnlc.h" extern unsigned char *afs_indexFlags; /* Called by all write-on-close routines: regular afs_close, * store via background daemon and store via the * afs_FlushActiveVCaches routine (when CCORE is on). * avc->lock must be write-locked. */ afs_StoreOnLastReference(avc, treq) register struct vcache *avc; register struct vrequest *treq; { int code = 0; AFS_STATCNT(afs_StoreOnLastReference); /* if CCore flag is set, we clear it and do the extra decrement * ourselves now. If we're called by the CCore clearer, the CCore * flag will already be clear, so we don't have to worry about * clearing it twice. */ if (avc->states & CCore) { avc->states &= ~CCore; #if defined(AFS_SGI_ENV) osi_Assert(avc->opens > 0 && avc->execsOrWriters > 0); #endif /* WARNING: Our linux cm code treats the execsOrWriters counter differently * depending on the flags the file was opened with. So, if you make any * changes to the way the execsOrWriters flag is handled check with the * top level code. */ avc->opens--; avc->execsOrWriters--; AFS_RELE((struct vnode *)avc); /* VN_HOLD at set CCore(afs_FakeClose)*/ crfree((struct AFS_UCRED *)avc->linkData); /* "crheld" in afs_FakeClose */ avc->linkData = (char *)0; } /* Now, send the file back. Used to require 0 writers left, but now do * it on every close for write, since two closes in a row are harmless * since first will clean all chunks, and second will be noop. Note that * this will also save confusion when someone keeps a file open * inadvertently, since with old system, writes to the server would never * happen again. */ code = afs_StoreAllSegments(avc, treq, AFS_LASTSTORE/*!sync-to-disk*/); /* * We have to do these after the above store in done: in some systems like * aix they'll need to flush all the vm dirty pages to the disk via the * strategy routine. During that all procedure (done under no avc locks) * opens, refcounts would be zero, since it didn't reach the afs_{rd,wr} * routines which means the vcache is a perfect candidate for flushing! */ #if defined(AFS_SGI_ENV) osi_Assert(avc->opens > 0 && avc->execsOrWriters > 0); #endif avc->opens--; avc->execsOrWriters--; return code; } afs_MemWrite(avc, auio, aio, acred, noLock) register struct vcache *avc; struct uio *auio; int aio, noLock; struct AFS_UCRED *acred; { afs_int32 totalLength; afs_int32 transferLength; afs_int32 filePos; afs_int32 startDate; afs_int32 max; register struct dcache *tdc; #ifdef _HIGHC_ volatile #endif afs_int32 offset, len, error; struct uio tuio; struct iovec *tvec; /* again, should have define */ char *tfile; register afs_int32 code; struct vrequest treq; AFS_STATCNT(afs_MemWrite); if (avc->vc_error) return avc->vc_error; startDate = osi_Time(); if (code = afs_InitReq(&treq, acred)) return code; /* otherwise we read */ totalLength = auio->afsio_resid; filePos = auio->afsio_offset; error = 0; transferLength = 0; afs_Trace4(afs_iclSetp, CM_TRACE_WRITE, ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, filePos, ICL_TYPE_INT32, totalLength, ICL_TYPE_INT32, avc->m.Length); if (!noLock) { afs_MaybeWakeupTruncateDaemon(); ObtainWriteLock(&avc->lock,126); } #if defined(AFS_SGI_ENV) { off_t diff; /* * afs_xwrite handles setting m.Length * and handles APPEND mode. * Since we are called via strategy, we need to trim the write to * the actual size of the file */ osi_Assert(filePos <= avc->m.Length); diff = avc->m.Length - filePos; auio->afsio_resid = MIN(totalLength, diff); totalLength = auio->afsio_resid; } #else if (aio & IO_APPEND) { /* append mode, start it at the right spot */ #if defined(AFS_SUN56_ENV) auio->uio_loffset = 0; #endif filePos = auio->afsio_offset = avc->m.Length; } #endif /* * Note that we use startDate rather than calling osi_Time() here. * This is to avoid counting lock-waiting time in file date (for ranlib). */ avc->m.Date = startDate; #if defined(AFS_HPUX_ENV) || defined(AFS_GFS_ENV) #if defined(AFS_HPUX101_ENV) if ((totalLength + filePos) >> 9 > (p_rlimit(u.u_procp))[RLIMIT_FSIZE].rlim_cur) { #else #ifdef AFS_HPUX_ENV if ((totalLength + filePos) >> 9 > u.u_rlimit[RLIMIT_FSIZE].rlim_cur) { #else if (totalLength + filePos > u.u_rlimit[RLIMIT_FSIZE].rlim_cur) { #endif #endif if (!noLock) ReleaseWriteLock(&avc->lock); return (EFBIG); } #endif #ifdef AFS_VM_RDWR_ENV /* * If write is implemented via VM, afs_FakeOpen() is called from the * high-level write op. */ if (avc->execsOrWriters <= 0) { printf("WARNING: afs_ufswr vp=%x, exOrW=%d\n", avc, avc->execsOrWriters); } #else afs_FakeOpen(avc); #endif avc->states |= CDirty; tvec = (struct iovec *) osi_AllocSmallSpace(sizeof(struct iovec)); while (totalLength > 0) { /* Read the cached info. If we call GetDCache while the cache * truncate daemon is running we risk overflowing the disk cache. * Instead we check for an existing cache slot. If we cannot * find an existing slot we wait for the cache to drain * before calling GetDCache. */ if (noLock) { tdc = afs_FindDCache(avc, filePos); if (tdc) { offset = filePos - AFS_CHUNKTOBASE(tdc->f.chunk); len = tdc->f.chunkBytes - offset; } } else if (afs_blocksUsed > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) { tdc = afs_FindDCache(avc, filePos); if (tdc) { if (!hsame(tdc->f.versionNo, avc->m.DataVersion) || (tdc->flags & DFFetching)) { afs_PutDCache(tdc); tdc = NULL; } else { offset = filePos - AFS_CHUNKTOBASE(tdc->f.chunk); len = tdc->f.chunkBytes - offset; } } if (!tdc) { afs_MaybeWakeupTruncateDaemon(); while (afs_blocksUsed > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) { ReleaseWriteLock(&avc->lock); if (afs_blocksUsed - afs_blocksDiscarded > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) { afs_WaitForCacheDrain = 1; afs_osi_Sleep(&afs_WaitForCacheDrain); } afs_MaybeFreeDiscardedDCache(); afs_MaybeWakeupTruncateDaemon(); ObtainWriteLock(&avc->lock,506); } avc->states |= CDirty; tdc = afs_GetDCache(avc, filePos, &treq, &offset, &len, 4); } } else { tdc = afs_GetDCache(avc, filePos, &treq, &offset, &len, 4); } if (!tdc) { error = EIO; break; } if (!(afs_indexFlags[tdc->index] & IFDataMod)) { afs_stats_cmperf.cacheCurrDirtyChunks++; afs_indexFlags[tdc->index] |= IFDataMod; /* so it doesn't disappear */ } if (!(tdc->f.states & DWriting)) { /* don't mark entry as mod if we don't have to */ tdc->f.states |= DWriting; tdc->flags |= DFEntryMod; } len = totalLength; /* write this amount by default */ max = AFS_CHUNKTOSIZE(tdc->f.chunk); /* max size of this chunk */ if (max <= len + offset) { /*if we'd go past the end of this chunk */ /* it won't all fit in this chunk, so write as much as will fit */ len = max - offset; } /* mung uio structure to be right for this transfer */ afsio_copy(auio, &tuio, tvec); afsio_trim(&tuio, len); tuio.afsio_offset = offset; code = afs_MemWriteUIO(tdc->f.inode, &tuio); if (code) { error = code; ZapDCE(tdc); /* bad data */ afs_MemCacheTruncate(tdc->f.inode, 0); afs_stats_cmperf.cacheCurrDirtyChunks--; afs_indexFlags[tdc->index] &= ~IFDataMod; /* so it does disappear */ afs_PutDCache(tdc); break; } /* otherwise we've written some, fixup length, etc and continue with next seg */ len = len - tuio.afsio_resid; /* compute amount really transferred */ afsio_skip(auio, len); /* advance auio over data written */ /* compute new file size */ if (offset + len > tdc->f.chunkBytes) afs_AdjustSize(tdc, offset+len); totalLength -= len; transferLength += len; filePos += len; #if defined(AFS_SGI_ENV) /* afs_xwrite handles setting m.Length */ osi_Assert(filePos <= avc->m.Length); #else if (filePos > avc->m.Length) avc->m.Length = filePos; #endif #ifndef AFS_VM_RDWR_ENV /* * If write is implemented via VM, afs_DoPartialWrite() is called from * the high-level write op. */ if (!noLock) { code = afs_DoPartialWrite(avc, &treq); if (code) { error = code; afs_PutDCache(tdc); break; } } #endif afs_PutDCache(tdc); } #ifndef AFS_VM_RDWR_ENV afs_FakeClose(avc, acred); #endif if (error && !avc->vc_error) avc->vc_error = error; if (!noLock) ReleaseWriteLock(&avc->lock); osi_FreeSmallSpace(tvec); #ifdef AFS_DEC_ENV /* next, on GFS systems, we update g_size so that lseek's relative to EOF will work. GFS is truly a poorly-designed interface! */ afs_gfshack((struct gnode *) avc); #endif error = afs_CheckCode(error, &treq, 6); return error; } /* called on writes */ afs_UFSWrite(avc, auio, aio, acred, noLock) register struct vcache *avc; struct uio *auio; int aio, noLock; struct AFS_UCRED *acred; { afs_int32 totalLength; afs_int32 transferLength; afs_int32 filePos; afs_int32 startDate; afs_int32 max; register struct dcache *tdc; #ifdef _HIGHC_ volatile #endif afs_int32 offset, len, error; struct uio tuio; struct iovec *tvec; /* again, should have define */ struct osi_file *tfile; register afs_int32 code; struct vnode *vp; struct vrequest treq; AFS_STATCNT(afs_UFSWrite); if (avc->vc_error) return avc->vc_error; startDate = osi_Time(); if (code = afs_InitReq(&treq, acred)) return code; /* otherwise we read */ totalLength = auio->afsio_resid; filePos = auio->afsio_offset; error = 0; transferLength = 0; afs_Trace4(afs_iclSetp, CM_TRACE_WRITE, ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, filePos, ICL_TYPE_INT32, totalLength, ICL_TYPE_INT32, avc->m.Length); if (!noLock) { afs_MaybeWakeupTruncateDaemon(); ObtainWriteLock(&avc->lock,556); } #if defined(AFS_SGI_ENV) { off_t diff; /* * afs_xwrite handles setting m.Length * and handles APPEND mode. * Since we are called via strategy, we need to trim the write to * the actual size of the file */ osi_Assert(filePos <= avc->m.Length); diff = avc->m.Length - filePos; auio->afsio_resid = MIN(totalLength, diff); totalLength = auio->afsio_resid; } #else if (aio & IO_APPEND) { /* append mode, start it at the right spot */ #if defined(AFS_SUN56_ENV) auio->uio_loffset = 0; #endif filePos = auio->afsio_offset = avc->m.Length; } #endif /* * Note that we use startDate rather than calling osi_Time() here. * This is to avoid counting lock-waiting time in file date (for ranlib). */ avc->m.Date = startDate; #if defined(AFS_HPUX_ENV) || defined(AFS_GFS_ENV) #if defined(AFS_HPUX101_ENV) if ((totalLength + filePos) >> 9 > p_rlimit(u.u_procp)[RLIMIT_FSIZE].rlim_cur) { #else #ifdef AFS_HPUX_ENV if ((totalLength + filePos) >> 9 > u.u_rlimit[RLIMIT_FSIZE].rlim_cur) { #else if (totalLength + filePos > u.u_rlimit[RLIMIT_FSIZE].rlim_cur) { #endif #endif if (!noLock) ReleaseWriteLock(&avc->lock); return (EFBIG); } #endif #ifdef AFS_VM_RDWR_ENV /* * If write is implemented via VM, afs_FakeOpen() is called from the * high-level write op. */ if (avc->execsOrWriters <= 0) { printf("WARNING: afs_ufswr vp=%x, exOrW=%d\n", avc, avc->execsOrWriters); } #else afs_FakeOpen(avc); #endif avc->states |= CDirty; tvec = (struct iovec *) osi_AllocSmallSpace(sizeof(struct iovec)); while (totalLength > 0) { /* read the cached info */ if (noLock) { tdc = afs_FindDCache(avc, filePos); if (tdc) { offset = filePos - AFS_CHUNKTOBASE(tdc->f.chunk); len = tdc->f.chunkBytes - offset; } } else if (afs_blocksUsed > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) { tdc = afs_FindDCache(avc, filePos); if (tdc) { if (!hsame(tdc->f.versionNo, avc->m.DataVersion) || (tdc->flags & DFFetching)) { afs_PutDCache(tdc); tdc = NULL; } else { offset = filePos - AFS_CHUNKTOBASE(tdc->f.chunk); len = tdc->f.chunkBytes - offset; } } if (!tdc) { afs_MaybeWakeupTruncateDaemon(); while (afs_blocksUsed > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) { ReleaseWriteLock(&avc->lock); if (afs_blocksUsed - afs_blocksDiscarded > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) { afs_WaitForCacheDrain = 1; afs_osi_Sleep(&afs_WaitForCacheDrain); } afs_MaybeFreeDiscardedDCache(); afs_MaybeWakeupTruncateDaemon(); ObtainWriteLock(&avc->lock,509); } avc->states |= CDirty; tdc = afs_GetDCache(avc, filePos, &treq, &offset, &len, 4); } } else { tdc = afs_GetDCache(avc, filePos, &treq, &offset, &len, 4); } if (!tdc) { error = EIO; break; } if (!(afs_indexFlags[tdc->index] & IFDataMod)) { afs_stats_cmperf.cacheCurrDirtyChunks++; afs_indexFlags[tdc->index] |= IFDataMod; /* so it doesn't disappear */ } if (!(tdc->f.states & DWriting)) { /* don't mark entry as mod if we don't have to */ tdc->f.states |= DWriting; tdc->flags |= DFEntryMod; } tfile = (struct osi_file *)osi_UFSOpen(tdc->f.inode); len = totalLength; /* write this amount by default */ max = AFS_CHUNKTOSIZE(tdc->f.chunk); /* max size of this chunk */ if (max <= len + offset) { /*if we'd go past the end of this chunk */ /* it won't all fit in this chunk, so write as much as will fit */ len = max - offset; } /* mung uio structure to be right for this transfer */ afsio_copy(auio, &tuio, tvec); afsio_trim(&tuio, len); tuio.afsio_offset = offset; #ifdef AFS_AIX_ENV #ifdef AFS_AIX41_ENV AFS_GUNLOCK(); code = VNOP_RDWR(tfile->vnode, UIO_WRITE, FWRITE, &tuio, NULL, NULL, NULL, &afs_osi_cred); AFS_GLOCK(); #else #ifdef AFS_AIX32_ENV code = VNOP_RDWR(tfile->vnode, UIO_WRITE, FWRITE, &tuio, NULL, NULL); #else code = VNOP_RDWR(tfile->vnode, UIO_WRITE, FWRITE, (off_t)&offset, &tuio, NULL, NULL, -1); #endif #endif /* AFS_AIX41_ENV */ #else /* AFS_AIX_ENV */ #ifdef AFS_SUN5_ENV AFS_GUNLOCK(); VOP_RWLOCK(tfile->vnode, 1); code = VOP_WRITE(tfile->vnode, &tuio, 0, &afs_osi_cred); VOP_RWUNLOCK(tfile->vnode, 1); AFS_GLOCK(); if (code == ENOSPC) afs_warnuser("\n\n\n*** Cache partition is full - decrease cachesize!!! ***\n\n\n"); #else #if defined(AFS_SGI_ENV) AFS_GUNLOCK(); avc->states |= CWritingUFS; AFS_VOP_RWLOCK(tfile->vnode, VRWLOCK_WRITE); AFS_VOP_WRITE(tfile->vnode, &tuio, IO_ISLOCKED, &afs_osi_cred, code); AFS_VOP_RWUNLOCK(tfile->vnode, VRWLOCK_WRITE); avc->states &= ~CWritingUFS; AFS_GLOCK(); #else #ifdef AFS_OSF_ENV { struct ucred *tmpcred = u.u_cred; u.u_cred = &afs_osi_cred; tuio.uio_rw = UIO_WRITE; AFS_GUNLOCK(); VOP_WRITE(tfile->vnode, &tuio, 0, &afs_osi_cred, code); AFS_GLOCK(); u.u_cred = tmpcred; } #else /* AFS_OSF_ENV */ #if defined(AFS_HPUX100_ENV) { AFS_GUNLOCK(); code = VOP_RDWR(tfile->vnode, &tuio, UIO_WRITE, 0, &afs_osi_cred); AFS_GLOCK(); } #else #ifdef AFS_HPUX_ENV tuio.uio_fpflags &= ~FSYNCIO; /* don't do sync io */ #endif #if defined(AFS_LINUX20_ENV) AFS_GUNLOCK(); code = osi_file_uio_rdwr(tfile, &tuio, UIO_WRITE); AFS_GLOCK(); #else code = VOP_RDWR(tfile->vnode, &tuio, UIO_WRITE, 0, &afs_osi_cred); #endif /* AFS_LINUX20_ENV */ #endif /* AFS_HPUX100_ENV */ #endif /* AFS_OSF_ENV */ #endif /* AFS_SGI_ENV */ #endif /* AFS_SUN5_ENV */ #endif /* AFS_AIX41_ENV */ if (code) { error = code; ZapDCE(tdc); /* bad data */ osi_UFSTruncate(tfile,0); /* fake truncate the segment */ afs_AdjustSize(tdc, 0); /* sets f.chunkSize to 0 */ afs_stats_cmperf.cacheCurrDirtyChunks--; afs_indexFlags[tdc->index] &= ~IFDataMod; /* so it does disappear */ afs_PutDCache(tdc); afs_CFileClose(tfile); break; } /* otherwise we've written some, fixup length, etc and continue with next seg */ len = len - tuio.afsio_resid; /* compute amount really transferred */ afsio_skip(auio, len); /* advance auio over data written */ /* compute new file size */ if (offset + len > tdc->f.chunkBytes) afs_AdjustSize(tdc, offset+len); totalLength -= len; transferLength += len; filePos += len; #if defined(AFS_SGI_ENV) /* afs_xwrite handles setting m.Length */ osi_Assert(filePos <= avc->m.Length); #else if (filePos > avc->m.Length) { avc->m.Length = filePos; } #endif osi_UFSClose(tfile); #ifndef AFS_VM_RDWR_ENV /* * If write is implemented via VM, afs_DoPartialWrite() is called from * the high-level write op. */ if (!noLock) { code = afs_DoPartialWrite(avc, &treq); if (code) { error = code; afs_PutDCache(tdc); break; } } #endif afs_PutDCache(tdc); } #ifndef AFS_VM_RDWR_ENV afs_FakeClose(avc, acred); #endif error = afs_CheckCode(error, &treq, 7); /* This set is here so we get the CheckCode. */ if (error && !avc->vc_error) avc->vc_error = error; if (!noLock) ReleaseWriteLock(&avc->lock); osi_FreeSmallSpace(tvec); #ifdef AFS_DEC_ENV /* next, on GFS systems, we update g_size so that lseek's relative to EOF will work. GFS is truly a poorly-designed interface! */ afs_gfshack((struct gnode *) avc); #endif #ifndef AFS_VM_RDWR_ENV /* * If write is implemented via VM, afs_fsync() is called from the high-level * write op. */ #ifdef AFS_HPUX_ENV /* On hpux on synchronous writes syncio will be set to IO_SYNC. If * we're doing them because the file was opened with O_SYNCIO specified, * we have to look in the u area. No single mechanism here!! */ if (noLock && ((aio & IO_SYNC) | (auio->uio_fpflags & FSYNCIO))) { #else if (noLock && (aio & FSYNC)) { #endif if (!AFS_NFSXLATORREQ(acred)) afs_fsync(avc, acred); } #endif return error; } /* do partial write if we're low on unmodified chunks */ afs_DoPartialWrite(avc, areq) register struct vcache *avc; struct vrequest *areq; { register afs_int32 code; if (afs_stats_cmperf.cacheCurrDirtyChunks <= afs_stats_cmperf.cacheMaxDirtyChunks) return 0; /* nothing to do */ /* otherwise, call afs_StoreDCache (later try to do this async, if possible) */ afs_Trace2(afs_iclSetp, CM_TRACE_PARTIALWRITE, ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, avc->m.Length); #if defined(AFS_SUN5_ENV) code = afs_StoreAllSegments(avc, areq, AFS_ASYNC | AFS_VMSYNC_INVAL); #else code = afs_StoreAllSegments(avc, areq, AFS_ASYNC); #endif return code; } #if !defined (AFS_AIX_ENV) && !defined (AFS_HPUX_ENV) && !defined (AFS_SUN5_ENV) && !defined(AFS_SGI_ENV) && !defined(AFS_LINUX20_ENV) #ifdef AFS_DUX40_ENV #define vno_close vn_close #endif /* We don't need this for AIX since: * (1) aix doesn't use fileops and it call close directly intead * (where the unlocking should be done) and * (2) temporarily, the aix lockf isn't supported yet. * * this stupid routine is used to release the flocks held on a * particular file descriptor. Sun doesn't pass file descr. info * through to the vnode layer, and yet we must unlock flocked files * on the *appropriate* (not first, as in System V) close call. Thus * this code. * How does this code get invoked? The afs AFS_FLOCK plugs in the new afs * file ops structure into any afs file when it gets flocked. * N.B: Intercepting close syscall doesn't trap aborts or exit system * calls. */ afs_closex(afd) register struct file *afd; { struct vrequest treq; register struct vcache *tvc; afs_int32 flags; int closeDone; afs_int32 code = 0; AFS_STATCNT(afs_closex); /* setup the credentials */ if (code = afs_InitReq(&treq, u.u_cred)) return code; closeDone = 0; /* we're the last one. If we're an AFS vnode, clear the flags, * close the file and release the lock when done. Otherwise, just * let the regular close code work. */ if (afd->f_type == DTYPE_VNODE) { tvc = (struct vcache *) afd->f_data; if (IsAfsVnode((struct vnode *)tvc)) { VN_HOLD((struct vnode *) tvc); flags = afd->f_flag & (FSHLOCK | FEXLOCK); afd->f_flag &= ~(FSHLOCK | FEXLOCK); code = vno_close(afd); if (flags) #if defined(AFS_SGI_ENV) || defined(AFS_OSF_ENV) || defined(AFS_SUN_ENV) && !defined(AFS_SUN5_ENV) HandleFlock(tvc, LOCK_UN, &treq, u.u_procp->p_pid, 1/*onlymine*/); #else HandleFlock(tvc, LOCK_UN, &treq, 0, 1/*onlymine*/); #endif #ifdef AFS_DEC_ENV grele((struct gnode *) tvc); #else AFS_RELE((struct vnode *) tvc); #endif closeDone = 1; } } /* now, if close not done, do it */ if (!closeDone) { code = vno_close(afd); } return code; /* return code from vnode layer */ } #endif /* handle any closing cleanup stuff */ #ifdef AFS_SGI_ENV afs_close(OSI_VC_ARG(avc), aflags, lastclose, #if !defined(AFS_SGI65_ENV) offset, #endif acred #if defined(AFS_SGI64_ENV) && !defined(AFS_SGI65_ENV) , flp #endif ) lastclose_t lastclose; #if !defined(AFS_SGI65_ENV) off_t offset; #if defined(AFS_SGI64_ENV) struct flid *flp; #endif #endif #else /* SGI */ #if defined(AFS_SUN_ENV) || defined(AFS_SUN5_ENV) #ifdef AFS_SUN5_ENV afs_close(OSI_VC_ARG(avc), aflags, count, offset, acred) offset_t offset; #else afs_close(OSI_VC_ARG(avc), aflags, count, acred) #endif int count; #else afs_close(OSI_VC_ARG(avc), aflags, acred) #endif #endif OSI_VC_DECL(avc); afs_int32 aflags; struct AFS_UCRED *acred; { register afs_int32 code, initreq=0; register struct brequest *tb; struct vrequest treq; #ifdef AFS_SGI65_ENV struct flid flid; #endif OSI_VC_CONVERT(avc) AFS_STATCNT(afs_close); afs_Trace2(afs_iclSetp, CM_TRACE_CLOSE, ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, aflags); #ifdef AFS_SUN5_ENV if (avc->flockCount) { if (code = afs_InitReq(&treq, acred)) return code; initreq = 1; HandleFlock(avc, LOCK_UN, &treq, 0, 1/*onlymine*/); } #endif #if defined(AFS_SGI_ENV) if (!lastclose) return 0; #else #if defined(AFS_SUN_ENV) || defined(AFS_SGI_ENV) if (count > 1) { /* 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. */ return 0; } #endif #ifdef AFS_SUN5_ENV if (!initreq) { #endif #endif if (code = afs_InitReq(&treq, acred)) return code; #ifdef AFS_SUN5_ENV } #endif #ifndef AFS_SUN5_ENV #if defined(AFS_SGI_ENV) /* unlock any locks for pid - could be wrong for child .. */ AFS_RWLOCK((vnode_t *)avc, VRWLOCK_WRITE); #ifdef AFS_SGI65_ENV get_current_flid(&flid); cleanlocks((vnode_t *)avc, flid.fl_pid, flid.fl_sysid); HandleFlock(avc, LOCK_UN, &treq, flid.fl_pid, 1/*onlymine*/); #else #ifdef AFS_SGI64_ENV cleanlocks((vnode_t *)avc, flp); #else /* AFS_SGI64_ENV */ cleanlocks((vnode_t *)avc, u.u_procp->p_epid, u.u_procp->p_sysid); #endif /* AFS_SGI64_ENV */ HandleFlock(avc, LOCK_UN, &treq, OSI_GET_CURRENT_PID(), 1/*onlymine*/); #endif /* AFS_SGI65_ENV */ /* afs_chkpgoob will drop and re-acquire the global lock. */ afs_chkpgoob(&avc->v, btoc(avc->m.Length)); #else if (avc->flockCount) { /* Release Lock */ #if defined(AFS_OSF_ENV) || defined(AFS_SUN_ENV) HandleFlock(avc, LOCK_UN, &treq, u.u_procp->p_pid, 1/*onlymine*/); #else HandleFlock(avc, LOCK_UN, &treq, 0, 1/*onlymine*/); #endif } #endif #endif if (aflags & (FWRITE | FTRUNC)) { if (afs_BBusy()) { /* do it yourself if daemons are all busy */ ObtainWriteLock(&avc->lock,124); code = afs_StoreOnLastReference(avc, &treq); ReleaseWriteLock(&avc->lock); #if defined(AFS_SGI_ENV) AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE); #endif } else { #if defined(AFS_SGI_ENV) AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE); #endif /* at least one daemon is idle, so ask it to do the store. Also, note that we don't lock it any more... */ tb = afs_BQueue(BOP_STORE, avc, 0, 1, acred, (long)acred->cr_uid, 0L, 0L, 0L); /* sleep waiting for the store to start, then retrieve error code */ while ((tb->flags & BUVALID) == 0) { tb->flags |= BUWAIT; afs_osi_Sleep(tb); } code = tb->code; afs_BRelease(tb); } /* VNOVNODE is "acceptable" error code from close, since may happen when deleting a file on another machine while it is open here. We do the same for ENOENT since in afs_CheckCode we map VNOVNODE -> ENOENT */ if (code == VNOVNODE || code == ENOENT) code = 0; /* Ensure last closer gets the error. If another thread caused * DoPartialWrite and this thread does not actually store the data, * it may not see the quota error. */ ObtainWriteLock(&avc->lock,406); if (avc->vc_error) { #ifdef AFS_AIX32_ENV osi_ReleaseVM(avc, acred); #endif code = avc->vc_error; avc->vc_error = 0; } ReleaseWriteLock(&avc->lock); /* some codes merit specific complaint */ if (code < 0) { afs_warnuser("afs: failed to store file (network problems)\n"); } #ifdef AFS_SUN5_ENV else if (code == ENOSPC) { afs_warnuser("afs: failed to store file (over quota or partition full)\n"); } #else else if (code == ENOSPC) { afs_warnuser("afs: failed to store file (partition full)\n"); } else if (code == EDQUOT) { afs_warnuser("afs: failed to store file (over quota)\n"); } #endif else if (code != 0) afs_warnuser("afs: failed to store file (%d)\n", code); /* finally, we flush any text pages lying around here */ hzero(avc->flushDV); osi_FlushText(avc); } else { #if defined(AFS_SGI_ENV) AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE); osi_Assert(avc->opens > 0); #endif /* file open for read */ ObtainWriteLock(&avc->lock, 411); if (avc->vc_error) { #ifdef AFS_AIX32_ENV osi_ReleaseVM(avc, acred); #endif code = avc->vc_error; avc->vc_error = 0; } avc->opens--; ReleaseWriteLock(&avc->lock); } #ifdef AFS_OSF_ENV if ((avc->vrefCount <= 2) && (avc->states & CUnlinked)) { afs_remunlink(avc, 1); /* ignore any return code */ } #endif code = afs_CheckCode(code, &treq, 5); return code; } #ifdef AFS_OSF_ENV afs_fsync(avc, fflags, acred, waitfor) int fflags; int waitfor; #else /* AFS_OSF_ENV */ #if defined(AFS_SGI_ENV) || defined(AFS_SUN53_ENV) afs_fsync(OSI_VC_ARG(avc), flag, acred #ifdef AFS_SGI65_ENV , start, stop #endif ) #else afs_fsync(avc, acred) #endif #endif OSI_VC_DECL(avc); struct AFS_UCRED *acred; #if defined(AFS_SGI_ENV) || defined(AFS_SUN53_ENV) int flag; #ifdef AFS_SGI65_ENV off_t start, stop; #endif #endif { register afs_int32 code; struct vrequest treq; OSI_VC_CONVERT(avc) if (avc->vc_error) return avc->vc_error; #if defined(AFS_SUN5_ENV) /* back out if called from NFS server */ if (curthread->t_flag & T_DONTPEND) return 0; #endif AFS_STATCNT(afs_fsync); afs_Trace1(afs_iclSetp, CM_TRACE_FSYNC, ICL_TYPE_POINTER, avc); if (code = afs_InitReq(&treq, acred)) return code; #if defined(AFS_SGI_ENV) AFS_RWLOCK((vnode_t *)avc, VRWLOCK_WRITE); if (flag & FSYNC_INVAL) osi_VM_FSyncInval(avc); #endif /* AFS_SGI_ENV */ ObtainSharedLock(&avc->lock,18); code = 0; if (avc->execsOrWriters > 0) { /* put the file back */ UpgradeSToWLock(&avc->lock,41); code = afs_StoreAllSegments(avc, &treq, AFS_SYNC); ConvertWToSLock(&avc->lock); } #if defined(AFS_SGI_ENV) AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE); if (code == VNOVNODE) { /* syncing an unlinked file! - non-informative to pass an errno * 102 (== VNOVNODE) to user */ code = ENOENT; } #endif code = afs_CheckCode(code, &treq, 33); ReleaseSharedLock(&avc->lock); return code; }