| File: | afs/afs_vcache.c |
| Location: | line 854, column 6 |
| Description: | Value stored to 'tvc' is never read |
| 1 | /* |
| 2 | * Copyright 2000, International Business Machines Corporation and others. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 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 |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * Implements: |
| 12 | * afs_FlushVCache |
| 13 | * afs_AllocCBR |
| 14 | * afs_FreeCBR |
| 15 | * afs_FlushVCBs |
| 16 | * afs_QueueVCB |
| 17 | * afs_RemoveVCB |
| 18 | * afs_NewVCache |
| 19 | * afs_FlushActiveVcaches |
| 20 | * afs_VerifyVCache2 |
| 21 | * afs_WriteVCache |
| 22 | * afs_WriteVCacheDiscon |
| 23 | * afs_SimpleVStat |
| 24 | * afs_ProcessFS |
| 25 | * TellALittleWhiteLie |
| 26 | * afs_RemoteLookup |
| 27 | * afs_GetVCache |
| 28 | * afs_LookupVCache |
| 29 | * afs_GetRootVCache |
| 30 | * afs_UpdateStatus |
| 31 | * afs_FetchStatus |
| 32 | * afs_StuffVcache |
| 33 | * afs_PutVCache |
| 34 | * afs_FindVCache |
| 35 | * afs_NFSFindVCache |
| 36 | * afs_vcacheInit |
| 37 | * shutdown_vcache |
| 38 | * |
| 39 | */ |
| 40 | #include <afsconfig.h> |
| 41 | #include "afs/param.h" |
| 42 | |
| 43 | #include "afs/sysincludes.h" /*Standard vendor system headers */ |
| 44 | #include "afsincludes.h" /*AFS-based standard headers */ |
| 45 | #include "afs/afs_stats.h" |
| 46 | #include "afs/afs_cbqueue.h" |
| 47 | #include "afs/afs_osidnlc.h" |
| 48 | |
| 49 | afs_int32 afs_maxvcount = 0; /* max number of vcache entries */ |
| 50 | afs_int32 afs_vcount = 0; /* number of vcache in use now */ |
| 51 | |
| 52 | #ifdef AFS_SGI_ENV |
| 53 | int afsvnumbers = 0; |
| 54 | #endif |
| 55 | |
| 56 | #ifdef AFS_SGI64_ENV |
| 57 | char *makesname(); |
| 58 | #endif /* AFS_SGI64_ENV */ |
| 59 | |
| 60 | /* Exported variables */ |
| 61 | afs_rwlock_t afs_xvcdirty; /*Lock: discon vcache dirty list mgmt */ |
| 62 | afs_rwlock_t afs_xvcache; /*Lock: alloc new stat cache entries */ |
| 63 | afs_rwlock_t afs_xvreclaim; /*Lock: entries reclaimed, not on free list */ |
| 64 | afs_lock_t afs_xvcb; /*Lock: fids on which there are callbacks */ |
| 65 | #if !defined(AFS_LINUX22_ENV) |
| 66 | static struct vcache *freeVCList; /*Free list for stat cache entries */ |
| 67 | struct vcache *ReclaimedVCList; /*Reclaimed list for stat entries */ |
| 68 | static struct vcache *Initial_freeVCList; /*Initial list for above */ |
| 69 | #endif |
| 70 | struct afs_q VLRU; /*vcache LRU */ |
| 71 | afs_int32 vcachegen = 0; |
| 72 | unsigned int afs_paniconwarn = 0; |
| 73 | struct vcache *afs_vhashT[VCSIZE1024]; |
| 74 | struct afs_q afs_vhashTV[VCSIZE1024]; |
| 75 | static struct afs_cbr *afs_cbrHashT[CBRSIZE512]; |
| 76 | afs_int32 afs_bulkStatsLost; |
| 77 | int afs_norefpanic = 0; |
| 78 | |
| 79 | |
| 80 | /* Disk backed vcache definitions |
| 81 | * Both protected by xvcache */ |
| 82 | static int afs_nextVcacheSlot = 0; |
| 83 | static struct afs_slotlist *afs_freeSlotList = NULL((void *)0); |
| 84 | |
| 85 | /* Forward declarations */ |
| 86 | static afs_int32 afs_QueueVCB(struct vcache *avc, int *slept); |
| 87 | |
| 88 | /*! |
| 89 | * Generate an index into the hash table for a given Fid. |
| 90 | * \param fid |
| 91 | * \return The hash value. |
| 92 | */ |
| 93 | static int |
| 94 | afs_HashCBRFid(struct AFSFid *fidusr_fid) |
| 95 | { |
| 96 | return (fidusr_fid->Volume + fidusr_fid->Vnode + fidusr_fid->Unique) % CBRSIZE512; |
| 97 | } |
| 98 | |
| 99 | /*! |
| 100 | * Insert a CBR entry into the hash table. |
| 101 | * Must be called with afs_xvcb held. |
| 102 | * \param cbr |
| 103 | * \return |
| 104 | */ |
| 105 | static void |
| 106 | afs_InsertHashCBR(struct afs_cbr *cbr) |
| 107 | { |
| 108 | int slot = afs_HashCBRFid(&cbr->fidusr_fid); |
| 109 | |
| 110 | cbr->hash_next = afs_cbrHashT[slot]; |
| 111 | if (afs_cbrHashT[slot]) |
| 112 | afs_cbrHashT[slot]->hash_pprev = &cbr->hash_next; |
| 113 | |
| 114 | cbr->hash_pprev = &afs_cbrHashT[slot]; |
| 115 | afs_cbrHashT[slot] = cbr; |
| 116 | } |
| 117 | |
| 118 | /*! |
| 119 | * |
| 120 | * Flush the given vcache entry. |
| 121 | * |
| 122 | * Environment: |
| 123 | * afs_xvcache lock must be held for writing upon entry to |
| 124 | * prevent people from changing the vrefCount field, and to |
| 125 | * protect the lruq and hnext fields. |
| 126 | * LOCK: afs_FlushVCache afs_xvcache W |
| 127 | * REFCNT: vcache ref count must be zero on entry except for osf1 |
| 128 | * RACE: lock is dropped and reobtained, permitting race in caller |
| 129 | * |
| 130 | * \param avc Pointer to vcache entry to flush. |
| 131 | * \param slept Pointer to int to set 1 if we sleep/drop locks, 0 if we don't. |
| 132 | * |
| 133 | */ |
| 134 | int |
| 135 | afs_FlushVCache(struct vcache *avc, int *slept) |
| 136 | { /*afs_FlushVCache */ |
| 137 | |
| 138 | afs_int32 i, code; |
| 139 | struct vcache **uvc, *wvc; |
| 140 | |
| 141 | *slept = 0; |
| 142 | AFS_STATCNT(afs_FlushVCache)((afs_cmstats.callInfo.C_afs_FlushVCache)++); |
| 143 | afs_Trace2(afs_iclSetp, CM_TRACE_FLUSHV, ICL_TYPE_POINTER, avc,(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event2(afs_iclSetp, (701087752L), (1<<24)+((2) <<18)+((7)<<12), (long)(avc), (long)(avc->f.states )) : 0) |
| 144 | ICL_TYPE_INT32, avc->f.states)(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event2(afs_iclSetp, (701087752L), (1<<24)+((2) <<18)+((7)<<12), (long)(avc), (long)(avc->f.states )) : 0); |
| 145 | |
| 146 | code = osi_VM_FlushVCache(avc, slept); |
| 147 | if (code) |
| 148 | goto bad; |
| 149 | |
| 150 | if (avc->f.states & CVFlushed0x00080000) { |
| 151 | code = EBUSY16; |
| 152 | goto bad; |
| 153 | } |
| 154 | #if !defined(AFS_LINUX22_ENV) |
| 155 | if (avc->nextfree || !avc->vlruq.prev || !avc->vlruq.next) { /* qv afs.h */ |
| 156 | refpanic("LRU vs. Free inconsistency")if (afs_norefpanic) { printf( "LRU vs. Free inconsistency" ); afs_norefpanic++;} else osi_Panic( "LRU vs. Free inconsistency" ); |
| 157 | } |
| 158 | #endif |
| 159 | avc->f.states |= CVFlushed0x00080000; |
| 160 | /* pull the entry out of the lruq and put it on the free list */ |
| 161 | QRemove(&avc->vlruq)((&avc->vlruq)->next->prev = (&avc->vlruq )->prev, (&avc->vlruq)->prev->next = (&avc ->vlruq)->next, (&avc->vlruq)->prev = ((void * )0), (&avc->vlruq)->next = ((void *)0)); |
| 162 | |
| 163 | /* keep track of # of files that we bulk stat'd, but never used |
| 164 | * before they got recycled. |
| 165 | */ |
| 166 | if (avc->f.states & CBulkStat0x00020000) |
| 167 | afs_bulkStatsLost++; |
| 168 | vcachegen++; |
| 169 | /* remove entry from the hash chain */ |
| 170 | i = VCHash(&avc->f.fid)(((&avc->f.usr_fid)->Fid.Volume + (&avc->f.usr_fid )->Fid.Vnode) & (1024 -1)); |
| 171 | uvc = &afs_vhashT[i]; |
| 172 | for (wvc = *uvc; wvc; uvc = &wvc->hnext, wvc = *uvc) { |
| 173 | if (avc == wvc) { |
| 174 | *uvc = avc->hnext; |
| 175 | avc->hnext = (struct vcache *)NULL((void *)0); |
| 176 | break; |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | /* remove entry from the volume hash table */ |
| 181 | QRemove(&avc->vhashq)((&avc->vhashq)->next->prev = (&avc->vhashq )->prev, (&avc->vhashq)->prev->next = (&avc ->vhashq)->next, (&avc->vhashq)->prev = ((void *)0), (&avc->vhashq)->next = ((void *)0)); |
| 182 | |
| 183 | if (avc->mvid) |
| 184 | osi_FreeSmallSpace(avc->mvid); |
| 185 | avc->mvid = (struct VenusFid *)0; |
| 186 | if (avc->linkData) { |
| 187 | afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1); |
| 188 | avc->linkData = NULL((void *)0); |
| 189 | } |
| 190 | #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) |
| 191 | /* OK, there are no internal vrefCounts, so there shouldn't |
| 192 | * be any more refs here. */ |
| 193 | if (avc->v) { |
| 194 | #ifdef AFS_DARWIN80_ENV |
| 195 | vnode_clearfsnode(AFSTOV(avc)(&(avc)->v)); |
| 196 | vnode_removefsref(AFSTOV(avc)(&(avc)->v)); |
| 197 | #else |
| 198 | avc->v->v_data = NULL((void *)0); /* remove from vnode */ |
| 199 | #endif |
| 200 | AFSTOV(avc)(&(avc)->v) = NULL((void *)0); /* also drop the ptr to vnode */ |
| 201 | } |
| 202 | #endif |
| 203 | #ifdef AFS_SUN510_ENV |
| 204 | /* As we use private vnodes, cleanup is up to us */ |
| 205 | vn_reinit(AFSTOV(avc)(&(avc)->v)); |
| 206 | #endif |
| 207 | afs_FreeAllAxs(&(avc->Access)); |
| 208 | if (!afs_shuttingdown) |
| 209 | afs_QueueVCB(avc, slept); |
| 210 | ObtainWriteLock(&afs_xcbhash, 460)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 460; } while (0); |
| 211 | afs_DequeueCallback(avc); /* remove it from queued callbacks list */ |
| 212 | avc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 213 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 214 | if ((avc->f.states & CForeign0x00002000) || (avc->f.fidusr_fid.Fid.Vnode & 1)) |
| 215 | osi_dnlc_purgedp(avc); /* if it (could be) a directory */ |
| 216 | else |
| 217 | osi_dnlc_purgevp(avc); |
| 218 | |
| 219 | /* |
| 220 | * Next, keep track of which vnodes we've deleted for create's |
| 221 | * optimistic synchronization algorithm |
| 222 | */ |
| 223 | afs_allZaps++; |
| 224 | if (avc->f.fidusr_fid.Fid.Vnode & 1) |
| 225 | afs_oddZaps++; |
| 226 | else |
| 227 | afs_evenZaps++; |
| 228 | |
| 229 | afs_vcount--; |
| 230 | #if !defined(AFS_LINUX22_ENV) |
| 231 | /* put the entry in the free list */ |
| 232 | avc->nextfree = freeVCList; |
| 233 | freeVCList = avc; |
| 234 | if (avc->vlruq.prev || avc->vlruq.next) { |
| 235 | refpanic("LRU vs. Free inconsistency")if (afs_norefpanic) { printf( "LRU vs. Free inconsistency" ); afs_norefpanic++;} else osi_Panic( "LRU vs. Free inconsistency" ); |
| 236 | } |
| 237 | avc->f.states |= CVFlushed0x00080000; |
| 238 | #else |
| 239 | /* This should put it back on the vnode free list since usecount is 1 */ |
| 240 | vSetType(avc, VREG)(avc)->v.v_type = (0100000); |
| 241 | if (VREFCOUNT_GT(avc,0)((avc)->v.v_count > (0))) { |
| 242 | AFS_RELE(AFSTOV(avc))do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( avc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 242);}while(0); if (--(((&(avc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(avc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 243 | afs_stats_cmperf.vcacheXAllocs--; |
| 244 | } else { |
| 245 | if (afs_norefpanic) { |
| 246 | afs_warn("flush vc refcnt < 1"); |
| 247 | afs_norefpanic++; |
| 248 | } else |
| 249 | osi_Panic("flush vc refcnt < 1"); |
| 250 | } |
| 251 | #endif /* AFS_LINUX22_ENV */ |
| 252 | return 0; |
| 253 | |
| 254 | bad: |
| 255 | return code; |
| 256 | } /*afs_FlushVCache */ |
| 257 | |
| 258 | #ifndef AFS_SGI_ENV |
| 259 | /*! |
| 260 | * The core of the inactive vnode op for all but IRIX. |
| 261 | * |
| 262 | * \param avc |
| 263 | * \param acred |
| 264 | */ |
| 265 | void |
| 266 | afs_InactiveVCache(struct vcache *avc, afs_ucred_tstruct usr_ucred *acred) |
| 267 | { |
| 268 | AFS_STATCNT(afs_inactive)((afs_cmstats.callInfo.C_afs_inactive)++); |
| 269 | if (avc->f.states & CDirty0x00000020) { |
| 270 | /* we can't keep trying to push back dirty data forever. Give up. */ |
| 271 | afs_InvalidateAllSegments(avc); /* turns off dirty bit */ |
| 272 | } |
| 273 | avc->f.states &= ~CMAPPED0x00000080; /* mainly used by SunOS 4.0.x */ |
| 274 | avc->f.states &= ~CDirty0x00000020; /* Turn it off */ |
| 275 | if (avc->f.states & CUnlinked0x00010000) { |
| 276 | if (CheckLock(&afs_xvcache)((&afs_xvcache)->excl_locked? (int) -1 : (int) (&afs_xvcache )->readers_reading) || CheckLock(&afs_xdcache)((&afs_xdcache)->excl_locked? (int) -1 : (int) (&afs_xdcache )->readers_reading)) { |
| 277 | avc->f.states |= CUnlinkedDel0x00040000; |
| 278 | return; |
| 279 | } |
| 280 | afs_remunlink(avc, 1); /* ignore any return code */ |
| 281 | } |
| 282 | |
| 283 | } |
| 284 | #endif |
| 285 | |
| 286 | /*! |
| 287 | * Allocate a callback return structure from the |
| 288 | * free list and return it. |
| 289 | * |
| 290 | * Environment: The alloc and free routines are both called with the afs_xvcb lock |
| 291 | * held, so we don't have to worry about blocking in osi_Alloc. |
| 292 | * |
| 293 | * \return The allocated afs_cbr. |
| 294 | */ |
| 295 | static struct afs_cbr *afs_cbrSpace = 0; |
| 296 | /* if alloc limit below changes, fix me! */ |
| 297 | static struct afs_cbr *afs_cbrHeads[16]; |
| 298 | struct afs_cbr * |
| 299 | afs_AllocCBR(void) |
| 300 | { |
| 301 | struct afs_cbr *tsp; |
| 302 | int i; |
| 303 | |
| 304 | while (!afs_cbrSpace) { |
| 305 | if (afs_stats_cmperf.CallBackAlloced >= sizeof(afs_cbrHeads)/sizeof(afs_cbrHeads[0])) { |
| 306 | /* don't allocate more than 16 * AFS_NCBRS for now */ |
| 307 | afs_FlushVCBs(0); |
| 308 | afs_stats_cmperf.CallBackFlushes++; |
| 309 | } else { |
| 310 | /* try allocating */ |
| 311 | tsp = afs_osi_Alloc(AFS_NCBRS1024 * sizeof(struct afs_cbr)); |
| 312 | osi_Assert(tsp != NULL)(void)((tsp != ((void *)0)) || (osi_AssertFailK( "tsp != NULL" , "/home/wollman/openafs/src/afs/afs_vcache.c", 312), 0)); |
| 313 | for (i = 0; i < AFS_NCBRS1024 - 1; i++) { |
| 314 | tsp[i].next = &tsp[i + 1]; |
| 315 | } |
| 316 | tsp[AFS_NCBRS1024 - 1].next = 0; |
| 317 | afs_cbrSpace = tsp; |
| 318 | afs_cbrHeads[afs_stats_cmperf.CallBackAlloced] = tsp; |
| 319 | afs_stats_cmperf.CallBackAlloced++; |
| 320 | } |
| 321 | } |
| 322 | tsp = afs_cbrSpace; |
| 323 | afs_cbrSpace = tsp->next; |
| 324 | return tsp; |
| 325 | } |
| 326 | |
| 327 | /*! |
| 328 | * Free a callback return structure, removing it from all lists. |
| 329 | * |
| 330 | * Environment: the xvcb lock is held over these calls. |
| 331 | * |
| 332 | * \param asp The address of the structure to free. |
| 333 | * |
| 334 | * \rerurn 0 |
| 335 | */ |
| 336 | int |
| 337 | afs_FreeCBR(struct afs_cbr *asp) |
| 338 | { |
| 339 | *(asp->pprev) = asp->next; |
| 340 | if (asp->next) |
| 341 | asp->next->pprev = asp->pprev; |
| 342 | |
| 343 | *(asp->hash_pprev) = asp->hash_next; |
| 344 | if (asp->hash_next) |
| 345 | asp->hash_next->hash_pprev = asp->hash_pprev; |
| 346 | |
| 347 | asp->next = afs_cbrSpace; |
| 348 | afs_cbrSpace = asp; |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static void |
| 353 | FlushAllVCBs(struct rx_connection **rxconns, int nconns, int nservers, |
| 354 | struct afs_conn **conns, struct srvAddr **addrs) |
| 355 | { |
| 356 | afs_int32 *results; |
| 357 | afs_int32 i; |
| 358 | |
| 359 | results = afs_osi_Alloc(nservers * sizeof (afs_int32)); |
| 360 | osi_Assert(results != NULL)(void)((results != ((void *)0)) || (osi_AssertFailK( "results != NULL" , "/home/wollman/openafs/src/afs/afs_vcache.c", 360), 0)); |
| 361 | |
| 362 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 362);}while(0); } while(0); |
| 363 | multi_Rx(rxconns,nconns)do { struct multi_handle *multi_h; int multi_i; int multi_i0; afs_int32 multi_error; struct rx_call *multi_call; multi_h = multi_Init(rxconns, nconns); for (multi_i0 = multi_i = 0; ; multi_i = multi_i0 ) |
| 364 | { |
| 365 | multi_RXAFS_GiveUpAllCallBacks()if (multi_h->nextReady == multi_h->firstNotReady && multi_i < multi_h->nConns) { multi_call = multi_h-> calls[multi_i]; if (multi_call) { StartRXAFS_GiveUpAllCallBacks (multi_call); rx_FlushWrite(multi_call); } multi_i0++; continue ; } if ((multi_i = multi_Select(multi_h)) < 0) break; multi_call = multi_h->calls[multi_i]; multi_error = rx_EndCall(multi_call , EndRXAFS_GiveUpAllCallBacks(multi_call)); multi_h->calls [multi_i] = (struct rx_call *) 0; |
| 366 | results[multi_i] = multi_error; |
| 367 | } multi_Endmulti_Finalize(multi_h); } while (0); |
| 368 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 368);}while(0); afs_global_owner = pthread_self(); } while( 0); |
| 369 | |
| 370 | /* |
| 371 | * Freeing the CBR will unlink it from the server's CBR list |
| 372 | * do it here, not in the loop, because a dynamic CBR will call |
| 373 | * into the memory management routines. |
| 374 | */ |
| 375 | for ( i = 0 ; i < nconns ; i++ ) { |
| 376 | if (results[i] == 0) { |
| 377 | /* Unchain all of them */ |
| 378 | while (addrs[i]->server->cbrs) |
| 379 | afs_FreeCBR(addrs[i]->server->cbrs); |
| 380 | } |
| 381 | } |
| 382 | afs_osi_Free(results, nservers * sizeof(afs_int32)); |
| 383 | } |
| 384 | |
| 385 | /*! |
| 386 | * Flush all queued callbacks to all servers. |
| 387 | * |
| 388 | * Environment: holds xvcb lock over RPC to guard against race conditions |
| 389 | * when a new callback is granted for the same file later on. |
| 390 | * |
| 391 | * \return 0 for success. |
| 392 | */ |
| 393 | afs_int32 |
| 394 | afs_FlushVCBs(afs_int32 lockit) |
| 395 | { |
| 396 | struct AFSFid *tfids; |
| 397 | struct AFSCallBack callBacks[1]; |
| 398 | struct AFSCBFids fidArray; |
| 399 | struct AFSCBs cbArray; |
| 400 | afs_int32 code; |
| 401 | struct afs_cbr *tcbrp; |
| 402 | int tcount; |
| 403 | struct server *tsp; |
| 404 | int i; |
| 405 | struct vrequest treq; |
| 406 | struct afs_conn *tc; |
| 407 | int safety1, safety2, safety3; |
| 408 | XSTATS_DECLSstruct afs_stats_opTimingData *opP = ((void *)0); osi_timeval_t opStartTime = { 0, 0}, opStopTime, elapsedTime; |
| 409 | |
| 410 | if (AFS_IS_DISCONNECTED(afs_is_disconnected)) |
| 411 | return ENETDOWN50; |
| 412 | |
| 413 | if ((code = afs_InitReq(&treq, afs_osi_credp))) |
| 414 | return code; |
| 415 | treq.flags |= O_NONBLOCK0x0004; |
| 416 | tfids = afs_osi_Alloc(sizeof(struct AFSFid) * AFS_MAXCBRSCALL32); |
| 417 | osi_Assert(tfids != NULL)(void)((tfids != ((void *)0)) || (osi_AssertFailK( "tfids != NULL" , "/home/wollman/openafs/src/afs/afs_vcache.c", 417), 0)); |
| 418 | |
| 419 | if (lockit) |
| 420 | ObtainWriteLock(&afs_xvcb, 273)do { ; if (!(&afs_xvcb)->excl_locked && !(& afs_xvcb)->readers_reading) (&afs_xvcb) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcb, 2); (&afs_xvcb) ->pid_writer = (get_user_struct()->u_procp->p_pid ); (&afs_xvcb)->src_indicator = 273; } while (0); |
| 421 | /* |
| 422 | * Shutting down. |
| 423 | * First, attempt a multi across everything, all addresses |
| 424 | * for all servers we know of. |
| 425 | */ |
| 426 | |
| 427 | if (lockit == 2) |
| 428 | afs_LoopServers(AFS_LS_ALL2, NULL((void *)0), 0, FlushAllVCBs, NULL((void *)0)); |
| 429 | |
| 430 | ObtainReadLock(&afs_xserver)do { ; if (!((&afs_xserver)->excl_locked & 2)) ((& afs_xserver)->readers_reading)++; else Afs_Lock_Obtain(& afs_xserver, 1); (&afs_xserver)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 431 | for (i = 0; i < NSERVERS16; i++) { |
| 432 | for (safety1 = 0, tsp = afs_servers[i]; |
| 433 | tsp && safety1 < afs_totalServers + 10; |
| 434 | tsp = tsp->next, safety1++) { |
| 435 | /* don't have any */ |
| 436 | if (tsp->cbrs == (struct afs_cbr *)0) |
| 437 | continue; |
| 438 | |
| 439 | /* otherwise, grab a block of AFS_MAXCBRSCALL from the list |
| 440 | * and make an RPC, over and over again. |
| 441 | */ |
| 442 | tcount = 0; /* number found so far */ |
| 443 | for (safety2 = 0; safety2 < afs_cacheStats; safety2++) { |
| 444 | if (tcount >= AFS_MAXCBRSCALL32 || !tsp->cbrs) { |
| 445 | struct rx_connection *rxconn; |
| 446 | /* if buffer is full, or we've queued all we're going |
| 447 | * to from this server, we should flush out the |
| 448 | * callbacks. |
| 449 | */ |
| 450 | fidArray.AFSCBFids_len = tcount; |
| 451 | fidArray.AFSCBFids_val = (struct AFSFid *)tfids; |
| 452 | cbArray.AFSCBs_len = 1; |
| 453 | cbArray.AFSCBs_val = callBacks; |
| 454 | memset(&callBacks[0], 0, sizeof(callBacks[0])); |
| 455 | callBacks[0].CallBackType = CB_EXCLUSIVE1; |
| 456 | for (safety3 = 0; safety3 < AFS_MAXHOSTS13 * 2; safety3++) { |
| 457 | tc = afs_ConnByHost(tsp, tsp->cell->fsport, |
| 458 | tsp->cell->cellNum, &treq, 0, |
| 459 | SHARED_LOCK4, &rxconn); |
| 460 | if (tc) { |
| 461 | XSTATS_START_TIMEopP = &(afs_stats_cmfullperf.rpc.fsRPCTimes[17]); osi_GetTime (&opStartTime); |
| 462 | (AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS)opP = &(afs_stats_cmfullperf.rpc.fsRPCTimes[17]); osi_GetTime (&opStartTime);; |
| 463 | RX_AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 463);}while(0); } while(0); |
| 464 | code = |
| 465 | RXAFS_GiveUpCallBacks(rxconn, &fidArray, |
| 466 | &cbArray); |
| 467 | RX_AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 467);}while(0); afs_global_owner = pthread_self(); } while( 0); |
| 468 | XSTATS_END_TIMEosi_GetTime(&opStopTime); (opP->numOps)++; if (!code) { (opP->numSuccesses)++; { if (opStopTime.tv_usec < opStartTime .tv_usec) { opStopTime.tv_usec += 1000000; opStopTime.tv_sec -= 1; } elapsedTime.tv_sec = opStopTime.tv_sec - opStartTime.tv_sec ; elapsedTime.tv_usec = opStopTime.tv_usec - opStartTime.tv_usec ; }; { (opP->sumTime).tv_sec += elapsedTime.tv_sec; (opP-> sumTime).tv_usec += elapsedTime.tv_usec; if ((opP->sumTime ).tv_usec > 1000000) { (opP->sumTime).tv_usec -= 1000000 ; (opP->sumTime).tv_sec++; } }; { if(elapsedTime.tv_sec > 0 ) { (opP->sqrTime).tv_sec += elapsedTime.tv_sec * elapsedTime .tv_sec + 2 * elapsedTime.tv_sec * elapsedTime.tv_usec /1000000 ; (opP->sqrTime).tv_usec += (2 * elapsedTime.tv_sec * elapsedTime .tv_usec) % 1000000 + (elapsedTime.tv_usec / 1000)*(elapsedTime .tv_usec / 1000) + 2 * (elapsedTime.tv_usec / 1000) * (elapsedTime .tv_usec % 1000) / 1000 + (((elapsedTime.tv_usec % 1000) > 707) ? 1 : 0); } else { (opP->sqrTime).tv_usec += (elapsedTime .tv_usec / 1000)*(elapsedTime.tv_usec / 1000) + 2 * (elapsedTime .tv_usec / 1000) * (elapsedTime.tv_usec % 1000) / 1000 + (((elapsedTime .tv_usec % 1000) > 707) ? 1 : 0); } if ((opP->sqrTime). tv_usec > 1000000) { (opP->sqrTime).tv_usec -= 1000000; (opP->sqrTime).tv_sec++; } }; if (((elapsedTime.tv_sec < (opP->minTime).tv_sec) ? 1 : (elapsedTime.tv_sec > (opP ->minTime).tv_sec) ? 0 : (elapsedTime.tv_usec < (opP-> minTime).tv_usec) ? 1 : 0)) { { (opP->minTime).tv_sec = elapsedTime .tv_sec; (opP->minTime).tv_usec = elapsedTime.tv_usec; }; } if (((elapsedTime.tv_sec > (opP->maxTime).tv_sec) ? 1 : (elapsedTime.tv_sec < (opP->maxTime).tv_sec) ? 0 : (elapsedTime .tv_usec > (opP->maxTime).tv_usec) ? 1 : 0)) { { (opP-> maxTime).tv_sec = elapsedTime.tv_sec; (opP->maxTime).tv_usec = elapsedTime.tv_usec; }; } }; |
| 469 | } else |
| 470 | code = -1; |
| 471 | if (!afs_Analyze |
| 472 | (tc, rxconn, code, 0, &treq, |
| 473 | AFS_STATS_FS_RPCIDX_GIVEUPCALLBACKS17, SHARED_LOCK4, |
| 474 | tsp->cell)) { |
| 475 | break; |
| 476 | } |
| 477 | } |
| 478 | /* ignore return code, since callbacks may have |
| 479 | * been returned anyway, we shouldn't leave them |
| 480 | * around to be returned again. |
| 481 | * |
| 482 | * Next, see if we are done with this server, and if so, |
| 483 | * break to deal with the next one. |
| 484 | */ |
| 485 | if (!tsp->cbrs) |
| 486 | break; |
| 487 | tcount = 0; |
| 488 | } |
| 489 | /* if to flush full buffer */ |
| 490 | /* if we make it here, we have an entry at the head of cbrs, |
| 491 | * which we should copy to the file ID array and then free. |
| 492 | */ |
| 493 | tcbrp = tsp->cbrs; |
| 494 | tfids[tcount++] = tcbrp->fidusr_fid; |
| 495 | |
| 496 | /* Freeing the CBR will unlink it from the server's CBR list */ |
| 497 | afs_FreeCBR(tcbrp); |
| 498 | } /* while loop for this one server */ |
| 499 | if (safety2 > afs_cacheStats) { |
| 500 | afs_warn("possible internal error afs_flushVCBs (%d)\n", |
| 501 | safety2); |
| 502 | } |
| 503 | } /* for loop for this hash chain */ |
| 504 | } /* loop through all hash chains */ |
| 505 | if (safety1 > afs_totalServers + 2) { |
| 506 | afs_warn |
| 507 | ("AFS internal error (afs_flushVCBs) (%d > %d), continuing...\n", |
| 508 | safety1, afs_totalServers + 2); |
| 509 | if (afs_paniconwarn) |
| 510 | osi_Panic("afs_flushVCBS safety1"); |
| 511 | } |
| 512 | |
| 513 | ReleaseReadLock(&afs_xserver)do { ; if (!(--((&afs_xserver)->readers_reading)) && (&afs_xserver)->wait_states) Afs_Lock_ReleaseW(&afs_xserver ) ; if ( (&afs_xserver)->pid_last_reader == (get_user_struct ()->u_procp->p_pid ) ) (&afs_xserver)->pid_last_reader =0; } while (0); |
| 514 | if (lockit) |
| 515 | ReleaseWriteLock(&afs_xvcb)do { ; (&afs_xvcb)->excl_locked &= ~2; if ((&afs_xvcb )->wait_states) Afs_Lock_ReleaseR(&afs_xvcb); (&afs_xvcb )->pid_writer=0; } while (0); |
| 516 | afs_osi_Free(tfids, sizeof(struct AFSFid) * AFS_MAXCBRSCALL32); |
| 517 | return 0; |
| 518 | } |
| 519 | |
| 520 | /*! |
| 521 | * Queue a callback on the given fid. |
| 522 | * |
| 523 | * Environment: |
| 524 | * Locks the xvcb lock. |
| 525 | * Called when the xvcache lock is already held. |
| 526 | * RACE: afs_xvcache may be dropped and reacquired |
| 527 | * |
| 528 | * \param avc vcache entry |
| 529 | * \param slep Set to 1 if we dropped afs_xvcache |
| 530 | * \return 1 if queued, 0 otherwise |
| 531 | */ |
| 532 | |
| 533 | static afs_int32 |
| 534 | afs_QueueVCB(struct vcache *avc, int *slept) |
| 535 | { |
| 536 | int queued = 0; |
| 537 | struct server *tsp; |
| 538 | struct afs_cbr *tcbp; |
| 539 | int reacquire = 0; |
| 540 | |
| 541 | AFS_STATCNT(afs_QueueVCB)((afs_cmstats.callInfo.C_afs_QueueVCB)++); |
| 542 | |
| 543 | ObtainWriteLock(&afs_xvcb, 274)do { ; if (!(&afs_xvcb)->excl_locked && !(& afs_xvcb)->readers_reading) (&afs_xvcb) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcb, 2); (&afs_xvcb) ->pid_writer = (get_user_struct()->u_procp->p_pid ); (&afs_xvcb)->src_indicator = 274; } while (0); |
| 544 | |
| 545 | /* we can't really give back callbacks on RO files, since the |
| 546 | * server only tracks them on a per-volume basis, and we don't |
| 547 | * know whether we still have some other files from the same |
| 548 | * volume. */ |
| 549 | if (!((avc->f.states & CRO0x00000004) == 0 && avc->callback)) { |
| 550 | goto done; |
| 551 | } |
| 552 | |
| 553 | /* The callback is really just a struct server ptr. */ |
| 554 | tsp = (struct server *)(avc->callback); |
| 555 | |
| 556 | if (!afs_cbrSpace) { |
| 557 | /* If we don't have CBR space, AllocCBR may block or hit the net for |
| 558 | * clearing up CBRs. Hitting the net may involve a fileserver |
| 559 | * needing to contact us, so we must drop xvcache so we don't block |
| 560 | * those requests from going through. */ |
| 561 | reacquire = *slept = 1; |
| 562 | ReleaseWriteLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~2; if ((& afs_xvcache)->wait_states) Afs_Lock_ReleaseR(&afs_xvcache ); (&afs_xvcache)->pid_writer=0; } while (0); |
| 563 | } |
| 564 | |
| 565 | /* we now have a pointer to the server, so we just allocate |
| 566 | * a queue entry and queue it. |
| 567 | */ |
| 568 | tcbp = afs_AllocCBR(); |
| 569 | tcbp->fidusr_fid = avc->f.fidusr_fid.Fid; |
| 570 | |
| 571 | tcbp->next = tsp->cbrs; |
| 572 | if (tsp->cbrs) |
| 573 | tsp->cbrs->pprev = &tcbp->next; |
| 574 | |
| 575 | tsp->cbrs = tcbp; |
| 576 | tcbp->pprev = &tsp->cbrs; |
| 577 | |
| 578 | afs_InsertHashCBR(tcbp); |
| 579 | queued = 1; |
| 580 | |
| 581 | done: |
| 582 | /* now release locks and return */ |
| 583 | ReleaseWriteLock(&afs_xvcb)do { ; (&afs_xvcb)->excl_locked &= ~2; if ((&afs_xvcb )->wait_states) Afs_Lock_ReleaseR(&afs_xvcb); (&afs_xvcb )->pid_writer=0; } while (0); |
| 584 | |
| 585 | if (reacquire) { |
| 586 | /* make sure this is after dropping xvcb, for locking order */ |
| 587 | ObtainWriteLock(&afs_xvcache, 279)do { ; if (!(&afs_xvcache)->excl_locked && !(& afs_xvcache)->readers_reading) (&afs_xvcache) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 2); (&afs_xvcache )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xvcache)->src_indicator = 279; } while (0); |
| 588 | } |
| 589 | return queued; |
| 590 | } |
| 591 | |
| 592 | |
| 593 | /*! |
| 594 | * Remove a queued callback for a given Fid. |
| 595 | * |
| 596 | * Environment: |
| 597 | * Locks xvcb and xserver locks. |
| 598 | * Typically called with xdcache, xvcache and/or individual vcache |
| 599 | * entries locked. |
| 600 | * |
| 601 | * \param afid The fid we want cleansed of queued callbacks. |
| 602 | * |
| 603 | */ |
| 604 | |
| 605 | void |
| 606 | afs_RemoveVCB(struct VenusFid *afid) |
| 607 | { |
| 608 | int slot; |
| 609 | struct afs_cbr *cbr, *ncbr; |
| 610 | |
| 611 | AFS_STATCNT(afs_RemoveVCB)((afs_cmstats.callInfo.C_afs_RemoveVCB)++); |
| 612 | ObtainWriteLock(&afs_xvcb, 275)do { ; if (!(&afs_xvcb)->excl_locked && !(& afs_xvcb)->readers_reading) (&afs_xvcb) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcb, 2); (&afs_xvcb) ->pid_writer = (get_user_struct()->u_procp->p_pid ); (&afs_xvcb)->src_indicator = 275; } while (0); |
| 613 | |
| 614 | slot = afs_HashCBRFid(&afid->Fid); |
| 615 | ncbr = afs_cbrHashT[slot]; |
| 616 | |
| 617 | while (ncbr) { |
| 618 | cbr = ncbr; |
| 619 | ncbr = cbr->hash_next; |
| 620 | |
| 621 | if (afid->Fid.Volume == cbr->fidusr_fid.Volume && |
| 622 | afid->Fid.Vnode == cbr->fidusr_fid.Vnode && |
| 623 | afid->Fid.Unique == cbr->fidusr_fid.Unique) { |
| 624 | afs_FreeCBR(cbr); |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | ReleaseWriteLock(&afs_xvcb)do { ; (&afs_xvcb)->excl_locked &= ~2; if ((&afs_xvcb )->wait_states) Afs_Lock_ReleaseR(&afs_xvcb); (&afs_xvcb )->pid_writer=0; } while (0); |
| 629 | } |
| 630 | |
| 631 | void |
| 632 | afs_FlushReclaimedVcaches(void) |
| 633 | { |
| 634 | #if !defined(AFS_LINUX22_ENV) |
| 635 | struct vcache *tvc; |
| 636 | int code, fv_slept; |
| 637 | struct vcache *tmpReclaimedVCList = NULL((void *)0); |
| 638 | |
| 639 | ObtainWriteLock(&afs_xvreclaim, 76)do { ; if (!(&afs_xvreclaim)->excl_locked && ! (&afs_xvreclaim)->readers_reading) (&afs_xvreclaim ) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvreclaim , 2); (&afs_xvreclaim)->pid_writer = (get_user_struct( )->u_procp->p_pid ); (&afs_xvreclaim)->src_indicator = 76; } while (0); |
| 640 | while (ReclaimedVCList) { |
| 641 | tvc = ReclaimedVCList; /* take from free list */ |
| 642 | ReclaimedVCList = tvc->nextfree; |
| 643 | tvc->nextfree = NULL((void *)0); |
| 644 | code = afs_FlushVCache(tvc, &fv_slept); |
| 645 | if (code) { |
| 646 | /* Ok, so, if we got code != 0, uh, wtf do we do? */ |
| 647 | /* Probably, build a temporary list and then put all back when we |
| 648 | get to the end of the list */ |
| 649 | /* This is actually really crappy, but we need to not leak these. |
| 650 | We probably need a way to be smarter about this. */ |
| 651 | tvc->nextfree = tmpReclaimedVCList; |
| 652 | tmpReclaimedVCList = tvc; |
| 653 | /* printf("Reclaim list flush %lx failed: %d\n", (unsigned long) tvc, code); */ |
| 654 | } |
| 655 | if (tvc->f.states & (CVInit0x10000000 |
| 656 | #ifdef AFS_DARWIN80_ENV |
| 657 | | CDeadVnode |
| 658 | #endif |
| 659 | )) { |
| 660 | tvc->f.states &= ~(CVInit0x10000000 |
| 661 | #ifdef AFS_DARWIN80_ENV |
| 662 | | CDeadVnode |
| 663 | #endif |
| 664 | ); |
| 665 | afs_osi_Wakeup(&tvc->f.states); |
| 666 | } |
| 667 | } |
| 668 | if (tmpReclaimedVCList) |
| 669 | ReclaimedVCList = tmpReclaimedVCList; |
| 670 | |
| 671 | ReleaseWriteLock(&afs_xvreclaim)do { ; (&afs_xvreclaim)->excl_locked &= ~2; if ((& afs_xvreclaim)->wait_states) Afs_Lock_ReleaseR(&afs_xvreclaim ); (&afs_xvreclaim)->pid_writer=0; } while (0); |
| 672 | #endif |
| 673 | } |
| 674 | |
| 675 | void |
| 676 | afs_PostPopulateVCache(struct vcache *avc, struct VenusFid *afid, int seq) |
| 677 | { |
| 678 | /* |
| 679 | * The proper value for mvstat (for root fids) is setup by the caller. |
| 680 | */ |
| 681 | avc->mvstat = 0; |
| 682 | if (afid->Fid.Vnode == 1 && afid->Fid.Unique == 1) |
| 683 | avc->mvstat = 2; |
| 684 | |
| 685 | if (afs_globalVFS == 0) |
| 686 | osi_Panic("afs globalvfs"); |
| 687 | |
| 688 | osi_PostPopulateVCache(avc); |
| 689 | |
| 690 | avc->dchint = NULL((void *)0); |
| 691 | osi_dnlc_purgedp(avc); /* this may be overkill */ |
| 692 | memset(&(avc->callsort), 0, sizeof(struct afs_q)); |
| 693 | avc->slocks = NULL((void *)0); |
| 694 | avc->f.states &=~ CVInit0x10000000; |
| 695 | if (seq) { |
| 696 | avc->f.states |= CBulkFetching0x04000000; |
| 697 | avc->f.m.Length = seq; |
| 698 | } |
| 699 | afs_osi_Wakeup(&avc->f.states); |
| 700 | } |
| 701 | |
| 702 | int |
| 703 | afs_ShakeLooseVCaches(afs_int32 anumber) |
| 704 | { |
| 705 | afs_int32 i, loop; |
| 706 | struct vcache *tvc; |
| 707 | struct afs_q *tq, *uq; |
| 708 | int fv_slept, defersleep = 0; |
| 709 | afs_int32 target = anumber; |
| 710 | |
| 711 | i = 0; |
| 712 | loop = 0; |
| 713 | for (tq = VLRU.prev; tq != &VLRU && anumber > 0; tq = uq) { |
| 714 | tvc = QTOV(tq)((struct vcache *)((char *)(tq)-(char *)(&((struct vcache *)((void *)0))->vlruq))); |
| 715 | uq = QPrev(tq)((tq)->prev); |
| 716 | if (tvc->f.states & CVFlushed0x00080000) { |
| 717 | refpanic("CVFlushed on VLRU")if (afs_norefpanic) { printf( "CVFlushed on VLRU" ); afs_norefpanic ++;} else osi_Panic( "CVFlushed on VLRU" ); |
| 718 | /* In the other path, this was 2 * afs_cacheStats */ |
| 719 | } else if (!afsd_dynamic_vcaches0 && i++ > afs_maxvcount) { |
| 720 | refpanic("Exceeded pool of AFS vnodes(VLRU cycle?)")if (afs_norefpanic) { printf( "Exceeded pool of AFS vnodes(VLRU cycle?)" ); afs_norefpanic++;} else osi_Panic( "Exceeded pool of AFS vnodes(VLRU cycle?)" ); |
| 721 | } else if (QNext(uq)((uq)->next) != tq) { |
| 722 | refpanic("VLRU inconsistent")if (afs_norefpanic) { printf( "VLRU inconsistent" ); afs_norefpanic ++;} else osi_Panic( "VLRU inconsistent" ); |
| 723 | } else if (tvc->f.states & CVInit0x10000000) { |
| 724 | continue; |
| 725 | } |
| 726 | |
| 727 | fv_slept = 0; |
| 728 | if (osi_TryEvictVCache(tvc, &fv_slept, defersleep)) |
| 729 | anumber--; |
| 730 | |
| 731 | if (fv_slept) { |
| 732 | if (loop++ > 100) |
| 733 | break; |
| 734 | uq = VLRU.prev; |
| 735 | i = 0; |
| 736 | continue; /* start over - may have raced. */ |
| 737 | } |
| 738 | if (tq == uq) { |
| 739 | if (anumber && !defersleep) { |
| 740 | defersleep = 1; |
| 741 | tq = VLRU.prev; |
| 742 | continue; |
| 743 | } |
| 744 | break; |
| 745 | } |
| 746 | } |
| 747 | if (!afsd_dynamic_vcaches0 && anumber == target) { |
| 748 | afs_warn("afs_ShakeLooseVCaches: warning none freed, using %d of %d\n", |
| 749 | afs_vcount, afs_maxvcount); |
| 750 | } |
| 751 | |
| 752 | return 0; |
| 753 | } |
| 754 | |
| 755 | /* Alloc new vnode. */ |
| 756 | |
| 757 | static struct vcache * |
| 758 | afs_AllocVCache(void) |
| 759 | { |
| 760 | struct vcache *tvc; |
| 761 | |
| 762 | tvc = osi_NewVnode(); |
| 763 | |
| 764 | afs_vcount++; |
| 765 | |
| 766 | /* track the peak */ |
| 767 | if (afsd_dynamic_vcaches0 && afs_maxvcount < afs_vcount) { |
| 768 | afs_maxvcount = afs_vcount; |
| 769 | /*printf("peak vnodes: %d\n", afs_maxvcount);*/ |
| 770 | } |
| 771 | |
| 772 | afs_stats_cmperf.vcacheXAllocs++; /* count in case we have a leak */ |
| 773 | |
| 774 | /* If we create a new inode, we either give it a new slot number, |
| 775 | * or if one's available, use a slot number from the slot free list |
| 776 | */ |
| 777 | if (afs_freeSlotList != NULL((void *)0)) { |
| 778 | struct afs_slotlist *tmp; |
| 779 | |
| 780 | tvc->diskSlot = afs_freeSlotList->slot; |
| 781 | tmp = afs_freeSlotList; |
| 782 | afs_freeSlotList = tmp->next; |
| 783 | afs_osi_Free(tmp, sizeof(struct afs_slotlist)); |
| 784 | } else { |
| 785 | tvc->diskSlot = afs_nextVcacheSlot++; |
| 786 | } |
| 787 | |
| 788 | return tvc; |
| 789 | } |
| 790 | |
| 791 | /* Pre populate a newly allocated vcache. On platforms where the actual |
| 792 | * vnode is attached to the vcache, this function is called before attachment, |
| 793 | * therefore it cannot perform any actions on the vnode itself */ |
| 794 | |
| 795 | static void |
| 796 | afs_PrePopulateVCache(struct vcache *avc, struct VenusFid *afid, |
| 797 | struct server *serverp) { |
| 798 | |
| 799 | afs_uint32 slot; |
| 800 | slot = avc->diskSlot; |
| 801 | |
| 802 | osi_PrePopulateVCache(avc); |
| 803 | |
| 804 | avc->diskSlot = slot; |
| 805 | QZero(&avc->metadirty)((&avc->metadirty)->prev = (&avc->metadirty) ->next = ((void *)0)); |
| 806 | |
| 807 | AFS_RWLOCK_INIT(&avc->lock, "vcache lock")Lock_Init(&avc->lock); |
| 808 | |
| 809 | avc->mvid = NULL((void *)0); |
| 810 | avc->linkData = NULL((void *)0); |
| 811 | avc->cbExpires = 0; |
| 812 | avc->opens = 0; |
| 813 | avc->execsOrWriters = 0; |
| 814 | avc->flockCount = 0; |
| 815 | avc->f.states = CVInit0x10000000; |
| 816 | avc->last_looker = 0; |
| 817 | avc->f.fidusr_fid = *afid; |
| 818 | avc->asynchrony = -1; |
| 819 | avc->vc_error = 0; |
| 820 | |
| 821 | hzero(avc->mapDV)((avc->mapDV).low = 0, (avc->mapDV).high = 0); |
| 822 | avc->f.truncPos = AFS_NOTRUNC0x7fffffff; /* don't truncate until we need to */ |
| 823 | hzero(avc->f.m.DataVersion)((avc->f.m.DataVersion).low = 0, (avc->f.m.DataVersion) .high = 0); /* in case we copy it into flushDV */ |
| 824 | avc->Access = NULL((void *)0); |
| 825 | avc->callback = serverp; /* to minimize chance that clear |
| 826 | * request is lost */ |
| 827 | |
| 828 | #if defined(AFS_CACHE_BYPASS) |
| 829 | avc->cachingStates = 0; |
| 830 | avc->cachingTransitions = 0; |
| 831 | #endif |
| 832 | } |
| 833 | |
| 834 | void |
| 835 | afs_FlushAllVCaches(void) |
| 836 | { |
| 837 | int i; |
| 838 | struct vcache *tvc, *nvc; |
| 839 | |
| 840 | ObtainWriteLock(&afs_xvcache, 867)do { ; if (!(&afs_xvcache)->excl_locked && !(& afs_xvcache)->readers_reading) (&afs_xvcache) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 2); (&afs_xvcache )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xvcache)->src_indicator = 867; } while (0); |
| 841 | |
| 842 | retry: |
| 843 | for (i = 0; i < VCSIZE1024; i++) { |
| 844 | for (tvc = afs_vhashT[i]; tvc; tvc = nvc) { |
| 845 | int slept; |
| 846 | |
| 847 | nvc = tvc->hnext; |
| 848 | if (afs_FlushVCache(tvc, &slept)) { |
| 849 | afs_warn("Failed to flush vcache 0x%lx\n", (unsigned long)(uintptrszunsigned int)tvc); |
| 850 | } |
| 851 | if (slept) { |
| 852 | goto retry; |
| 853 | } |
| 854 | tvc = nvc; |
Value stored to 'tvc' is never read | |
| 855 | } |
| 856 | } |
| 857 | |
| 858 | ReleaseWriteLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~2; if ((& afs_xvcache)->wait_states) Afs_Lock_ReleaseR(&afs_xvcache ); (&afs_xvcache)->pid_writer=0; } while (0); |
| 859 | } |
| 860 | |
| 861 | /*! |
| 862 | * This routine is responsible for allocating a new cache entry |
| 863 | * from the free list. It formats the cache entry and inserts it |
| 864 | * into the appropriate hash tables. It must be called with |
| 865 | * afs_xvcache write-locked so as to prevent several processes from |
| 866 | * trying to create a new cache entry simultaneously. |
| 867 | * |
| 868 | * LOCK: afs_NewVCache afs_xvcache W |
| 869 | * |
| 870 | * \param afid The file id of the file whose cache entry is being created. |
| 871 | * |
| 872 | * \return The new vcache struct. |
| 873 | */ |
| 874 | |
| 875 | static_inlinestatic inline struct vcache * |
| 876 | afs_NewVCache_int(struct VenusFid *afid, struct server *serverp, int seq) |
| 877 | { |
| 878 | struct vcache *tvc; |
| 879 | afs_int32 i, j; |
| 880 | afs_int32 anumber = VCACHE_FREE5; |
| 881 | |
| 882 | AFS_STATCNT(afs_NewVCache)((afs_cmstats.callInfo.C_afs_NewVCache)++); |
| 883 | |
| 884 | afs_FlushReclaimedVcaches(); |
| 885 | |
| 886 | #if defined(AFS_LINUX22_ENV) |
| 887 | if(!afsd_dynamic_vcaches0 && afs_vcount >= afs_maxvcount) { |
| 888 | afs_ShakeLooseVCaches(anumber); |
| 889 | if (afs_vcount >= afs_maxvcount) { |
| 890 | afs_warn("afs_NewVCache - none freed\n"); |
| 891 | return NULL((void *)0); |
| 892 | } |
| 893 | } |
| 894 | tvc = afs_AllocVCache(); |
| 895 | #else /* AFS_LINUX22_ENV */ |
| 896 | /* pull out a free cache entry */ |
| 897 | if (!freeVCList) { |
| 898 | afs_ShakeLooseVCaches(anumber); |
| 899 | } |
| 900 | |
| 901 | if (!freeVCList) { |
| 902 | tvc = afs_AllocVCache(); |
| 903 | } else { |
| 904 | tvc = freeVCList; /* take from free list */ |
| 905 | freeVCList = tvc->nextfree; |
| 906 | tvc->nextfree = NULL((void *)0); |
| 907 | afs_vcount++; /* balanced by FlushVCache */ |
| 908 | } /* end of if (!freeVCList) */ |
| 909 | |
| 910 | #endif /* AFS_LINUX22_ENV */ |
| 911 | |
| 912 | #if defined(AFS_XBSD_ENV) || defined(AFS_DARWIN_ENV) |
| 913 | if (tvc->v) |
| 914 | panic("afs_NewVCache(): free vcache with vnode attached")do{fprintf(__stderrp, "%s", "afs_NewVCache(): free vcache with vnode attached" );do{if (!(0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 914);}while(0);}while(0); |
| 915 | #endif |
| 916 | |
| 917 | /* Populate the vcache with as much as we can. */ |
| 918 | afs_PrePopulateVCache(tvc, afid, serverp); |
| 919 | |
| 920 | /* Thread the vcache onto the VLRU */ |
| 921 | |
| 922 | i = VCHash(afid)(((afid)->Fid.Volume + (afid)->Fid.Vnode) & (1024 - 1)); |
| 923 | j = VCHashV(afid)((afid)->Fid.Volume & (1024 -1)); |
| 924 | |
| 925 | tvc->hnext = afs_vhashT[i]; |
| 926 | afs_vhashT[i] = tvc; |
| 927 | QAdd(&afs_vhashTV[j], &tvc->vhashq)((&tvc->vhashq)->next = (&afs_vhashTV[j])->next , (&tvc->vhashq)->prev = (&afs_vhashTV[j]), (& afs_vhashTV[j])->next->prev = (&tvc->vhashq), (& afs_vhashTV[j])->next = (&tvc->vhashq)); |
| 928 | |
| 929 | if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { |
| 930 | refpanic("NewVCache VLRU inconsistent")if (afs_norefpanic) { printf( "NewVCache VLRU inconsistent" ) ; afs_norefpanic++;} else osi_Panic( "NewVCache VLRU inconsistent" ); |
| 931 | } |
| 932 | QAdd(&VLRU, &tvc->vlruq)((&tvc->vlruq)->next = (&VLRU)->next, (& tvc->vlruq)->prev = (&VLRU), (&VLRU)->next-> prev = (&tvc->vlruq), (&VLRU)->next = (&tvc ->vlruq)); /* put in lruq */ |
| 933 | if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { |
| 934 | refpanic("NewVCache VLRU inconsistent2")if (afs_norefpanic) { printf( "NewVCache VLRU inconsistent2" ) ; afs_norefpanic++;} else osi_Panic( "NewVCache VLRU inconsistent2" ); |
| 935 | } |
| 936 | if (tvc->vlruq.next->prev != &(tvc->vlruq)) { |
| 937 | refpanic("NewVCache VLRU inconsistent3")if (afs_norefpanic) { printf( "NewVCache VLRU inconsistent3" ) ; afs_norefpanic++;} else osi_Panic( "NewVCache VLRU inconsistent3" ); |
| 938 | } |
| 939 | if (tvc->vlruq.prev->next != &(tvc->vlruq)) { |
| 940 | refpanic("NewVCache VLRU inconsistent4")if (afs_norefpanic) { printf( "NewVCache VLRU inconsistent4" ) ; afs_norefpanic++;} else osi_Panic( "NewVCache VLRU inconsistent4" ); |
| 941 | } |
| 942 | vcachegen++; |
| 943 | |
| 944 | /* it should now be safe to drop the xvcache lock - so attach an inode |
| 945 | * to this vcache, where necessary */ |
| 946 | osi_AttachVnode(tvc, seq); |
| 947 | |
| 948 | /* Get a reference count to hold this vcache for the VLRUQ. Note that |
| 949 | * we have to do this after attaching the vnode, because the reference |
| 950 | * count may be held in the vnode itself */ |
| 951 | |
| 952 | #if defined(AFS_LINUX22_ENV) |
| 953 | /* Hold it for the LRU (should make count 2) */ |
| 954 | AFS_FAST_HOLD(tvc)do { { ((&((tvc))->v))->v_count++; }; } while(0); |
| 955 | #elif !(defined (AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)) |
| 956 | VREFCOUNT_SET(tvc, 1)(tvc)->v.v_count = 1;; /* us */ |
| 957 | #endif |
| 958 | |
| 959 | #if defined (AFS_FBSD_ENV) |
| 960 | if (tvc->f.states & CVInit0x10000000) |
| 961 | #endif |
| 962 | afs_PostPopulateVCache(tvc, afid, seq); |
| 963 | |
| 964 | return tvc; |
| 965 | } /*afs_NewVCache */ |
| 966 | |
| 967 | |
| 968 | struct vcache * |
| 969 | afs_NewVCache(struct VenusFid *afid, struct server *serverp) |
| 970 | { |
| 971 | return afs_NewVCache_int(afid, serverp, 0); |
| 972 | } |
| 973 | |
| 974 | struct vcache * |
| 975 | afs_NewBulkVCache(struct VenusFid *afid, struct server *serverp, int seq) |
| 976 | { |
| 977 | return afs_NewVCache_int(afid, serverp, seq); |
| 978 | } |
| 979 | |
| 980 | /*! |
| 981 | * ??? |
| 982 | * |
| 983 | * LOCK: afs_FlushActiveVcaches afs_xvcache N |
| 984 | * |
| 985 | * \param doflocks : Do we handle flocks? |
| 986 | */ |
| 987 | void |
| 988 | afs_FlushActiveVcaches(afs_int32 doflocks) |
| 989 | { |
| 990 | struct vcache *tvc; |
| 991 | int i; |
| 992 | struct afs_conn *tc; |
| 993 | afs_int32 code; |
| 994 | afs_ucred_tstruct usr_ucred *cred = NULL((void *)0); |
| 995 | struct vrequest treq, ureq; |
| 996 | struct AFSVolSync tsync; |
| 997 | int didCore; |
| 998 | XSTATS_DECLSstruct afs_stats_opTimingData *opP = ((void *)0); osi_timeval_t opStartTime = { 0, 0}, opStopTime, elapsedTime; |
| 999 | AFS_STATCNT(afs_FlushActiveVcaches)((afs_cmstats.callInfo.C_afs_FlushActiveVcaches)++); |
| 1000 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 1001 | for (i = 0; i < VCSIZE1024; i++) { |
| 1002 | for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) { |
| 1003 | if (tvc->f.states & CVInit0x10000000) continue; |
| 1004 | #ifdef AFS_DARWIN80_ENV |
| 1005 | if (tvc->f.states & CDeadVnode && |
| 1006 | (tvc->f.states & (CCore0x00000010|CUnlinkedDel0x00040000) || |
| 1007 | tvc->flockCount)) panic("Dead vnode has core/unlinkedel/flock")do{fprintf(__stderrp, "%s", "Dead vnode has core/unlinkedel/flock" );do{if (!(0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1007);}while(0);}while(0); |
| 1008 | #endif |
| 1009 | if (doflocks && tvc->flockCount != 0) { |
| 1010 | struct rx_connection *rxconn; |
| 1011 | /* if this entry has an flock, send a keep-alive call out */ |
| 1012 | osi_vnhold(tvc, 0)do { { ((&(tvc)->v))->v_count++; }; } while(0); |
| 1013 | ReleaseReadLock(&afs_xvcache)do { ; if (!(--((&afs_xvcache)->readers_reading)) && (&afs_xvcache)->wait_states) Afs_Lock_ReleaseW(&afs_xvcache ) ; if ( (&afs_xvcache)->pid_last_reader == (get_user_struct ()->u_procp->p_pid ) ) (&afs_xvcache)->pid_last_reader =0; } while (0); |
| 1014 | ObtainWriteLock(&tvc->lock, 51)do { ; if (!(&tvc->lock)->excl_locked && !( &tvc->lock)->readers_reading) (&tvc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&tvc->lock, 2); (&tvc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&tvc->lock)->src_indicator = 51 ; } while (0); |
| 1015 | do { |
| 1016 | afs_InitReq(&treq, afs_osi_credp); |
| 1017 | treq.flags |= O_NONBLOCK0x0004; |
| 1018 | |
| 1019 | tc = afs_Conn(&tvc->f.fidusr_fid, &treq, SHARED_LOCK4, &rxconn); |
| 1020 | if (tc) { |
| 1021 | XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_EXTENDLOCK)opP = &(afs_stats_cmfullperf.rpc.fsRPCTimes[14]); osi_GetTime (&opStartTime);; |
| 1022 | RX_AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1022);}while(0); } while(0); |
| 1023 | code = |
| 1024 | RXAFS_ExtendLock(rxconn, |
| 1025 | (struct AFSFid *)&tvc->f.fidusr_fid.Fid, |
| 1026 | &tsync); |
| 1027 | RX_AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1027);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 1028 | XSTATS_END_TIMEosi_GetTime(&opStopTime); (opP->numOps)++; if (!code) { (opP->numSuccesses)++; { if (opStopTime.tv_usec < opStartTime .tv_usec) { opStopTime.tv_usec += 1000000; opStopTime.tv_sec -= 1; } elapsedTime.tv_sec = opStopTime.tv_sec - opStartTime.tv_sec ; elapsedTime.tv_usec = opStopTime.tv_usec - opStartTime.tv_usec ; }; { (opP->sumTime).tv_sec += elapsedTime.tv_sec; (opP-> sumTime).tv_usec += elapsedTime.tv_usec; if ((opP->sumTime ).tv_usec > 1000000) { (opP->sumTime).tv_usec -= 1000000 ; (opP->sumTime).tv_sec++; } }; { if(elapsedTime.tv_sec > 0 ) { (opP->sqrTime).tv_sec += elapsedTime.tv_sec * elapsedTime .tv_sec + 2 * elapsedTime.tv_sec * elapsedTime.tv_usec /1000000 ; (opP->sqrTime).tv_usec += (2 * elapsedTime.tv_sec * elapsedTime .tv_usec) % 1000000 + (elapsedTime.tv_usec / 1000)*(elapsedTime .tv_usec / 1000) + 2 * (elapsedTime.tv_usec / 1000) * (elapsedTime .tv_usec % 1000) / 1000 + (((elapsedTime.tv_usec % 1000) > 707) ? 1 : 0); } else { (opP->sqrTime).tv_usec += (elapsedTime .tv_usec / 1000)*(elapsedTime.tv_usec / 1000) + 2 * (elapsedTime .tv_usec / 1000) * (elapsedTime.tv_usec % 1000) / 1000 + (((elapsedTime .tv_usec % 1000) > 707) ? 1 : 0); } if ((opP->sqrTime). tv_usec > 1000000) { (opP->sqrTime).tv_usec -= 1000000; (opP->sqrTime).tv_sec++; } }; if (((elapsedTime.tv_sec < (opP->minTime).tv_sec) ? 1 : (elapsedTime.tv_sec > (opP ->minTime).tv_sec) ? 0 : (elapsedTime.tv_usec < (opP-> minTime).tv_usec) ? 1 : 0)) { { (opP->minTime).tv_sec = elapsedTime .tv_sec; (opP->minTime).tv_usec = elapsedTime.tv_usec; }; } if (((elapsedTime.tv_sec > (opP->maxTime).tv_sec) ? 1 : (elapsedTime.tv_sec < (opP->maxTime).tv_sec) ? 0 : (elapsedTime .tv_usec > (opP->maxTime).tv_usec) ? 1 : 0)) { { (opP-> maxTime).tv_sec = elapsedTime.tv_sec; (opP->maxTime).tv_usec = elapsedTime.tv_usec; }; } }; |
| 1029 | } else |
| 1030 | code = -1; |
| 1031 | } while (afs_Analyze |
| 1032 | (tc, rxconn, code, &tvc->f.fidusr_fid, &treq, |
| 1033 | AFS_STATS_FS_RPCIDX_EXTENDLOCK14, SHARED_LOCK4, NULL((void *)0))); |
| 1034 | |
| 1035 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 1036 | #ifdef AFS_DARWIN80_ENV |
| 1037 | AFS_FAST_RELE(tvc)do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( tvc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1037);}while(0); if (--(((&(tvc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(tvc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 1038 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 1039 | #else |
| 1040 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 1041 | AFS_FAST_RELE(tvc)do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( tvc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1041);}while(0); if (--(((&(tvc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(tvc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 1042 | #endif |
| 1043 | } |
| 1044 | didCore = 0; |
| 1045 | if ((tvc->f.states & CCore0x00000010) || (tvc->f.states & CUnlinkedDel0x00040000)) { |
| 1046 | /* |
| 1047 | * Don't let it evaporate in case someone else is in |
| 1048 | * this code. Also, drop the afs_xvcache lock while |
| 1049 | * getting vcache locks. |
| 1050 | */ |
| 1051 | osi_vnhold(tvc, 0)do { { ((&(tvc)->v))->v_count++; }; } while(0); |
| 1052 | ReleaseReadLock(&afs_xvcache)do { ; if (!(--((&afs_xvcache)->readers_reading)) && (&afs_xvcache)->wait_states) Afs_Lock_ReleaseW(&afs_xvcache ) ; if ( (&afs_xvcache)->pid_last_reader == (get_user_struct ()->u_procp->p_pid ) ) (&afs_xvcache)->pid_last_reader =0; } while (0); |
| 1053 | #ifdef AFS_BOZONLOCK_ENV |
| 1054 | afs_BozonLock(&tvc->pvnLock, tvc); |
| 1055 | #endif |
| 1056 | #if defined(AFS_SGI_ENV) |
| 1057 | /* |
| 1058 | * That's because if we come in via the CUnlinkedDel bit state path we'll be have 0 refcnt |
| 1059 | */ |
| 1060 | osi_Assert(VREFCOUNT_GT(tvc,0))(void)((((tvc)->v.v_count > (0))) || (osi_AssertFailK( "VREFCOUNT_GT(tvc,0)" , "/home/wollman/openafs/src/afs/afs_vcache.c", 1060), 0)); |
| 1061 | AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE); |
| 1062 | #endif |
| 1063 | ObtainWriteLock(&tvc->lock, 52)do { ; if (!(&tvc->lock)->excl_locked && !( &tvc->lock)->readers_reading) (&tvc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&tvc->lock, 2); (&tvc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&tvc->lock)->src_indicator = 52 ; } while (0); |
| 1064 | if (tvc->f.states & CCore0x00000010) { |
| 1065 | tvc->f.states &= ~CCore0x00000010; |
| 1066 | /* XXXX Find better place-holder for cred XXXX */ |
| 1067 | cred = (afs_ucred_tstruct usr_ucred *)tvc->linkData; |
| 1068 | tvc->linkData = NULL((void *)0); /* XXX */ |
| 1069 | afs_InitReq(&ureq, cred); |
| 1070 | afs_Trace2(afs_iclSetp, CM_TRACE_ACTCCORE,(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event2(afs_iclSetp, (701087754L), (1<<24)+((2) <<18)+((7)<<12), (long)(tvc), (long)(tvc->execsOrWriters )) : 0) |
| 1071 | ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32,(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event2(afs_iclSetp, (701087754L), (1<<24)+((2) <<18)+((7)<<12), (long)(tvc), (long)(tvc->execsOrWriters )) : 0) |
| 1072 | tvc->execsOrWriters)(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event2(afs_iclSetp, (701087754L), (1<<24)+((2) <<18)+((7)<<12), (long)(tvc), (long)(tvc->execsOrWriters )) : 0); |
| 1073 | code = afs_StoreOnLastReference(tvc, &ureq); |
| 1074 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 1075 | #ifdef AFS_BOZONLOCK_ENV |
| 1076 | afs_BozonUnlock(&tvc->pvnLock, tvc); |
| 1077 | #endif |
| 1078 | hzero(tvc->flushDV)((tvc->flushDV).low = 0, (tvc->flushDV).high = 0); |
| 1079 | osi_FlushText(tvc); |
| 1080 | didCore = 1; |
| 1081 | if (code && code != VNOVNODE102) { |
| 1082 | afs_StoreWarn(code, tvc->f.fidusr_fid.Fid.Volume, |
| 1083 | /* /dev/console */ 1); |
| 1084 | } |
| 1085 | } else if (tvc->f.states & CUnlinkedDel0x00040000) { |
| 1086 | /* |
| 1087 | * Ignore errors |
| 1088 | */ |
| 1089 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 1090 | #ifdef AFS_BOZONLOCK_ENV |
| 1091 | afs_BozonUnlock(&tvc->pvnLock, tvc); |
| 1092 | #endif |
| 1093 | #if defined(AFS_SGI_ENV) |
| 1094 | AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE); |
| 1095 | #endif |
| 1096 | afs_remunlink(tvc, 0); |
| 1097 | #if defined(AFS_SGI_ENV) |
| 1098 | AFS_RWLOCK((vnode_t *) tvc, VRWLOCK_WRITE); |
| 1099 | #endif |
| 1100 | } else { |
| 1101 | /* lost (or won, perhaps) the race condition */ |
| 1102 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 1103 | #ifdef AFS_BOZONLOCK_ENV |
| 1104 | afs_BozonUnlock(&tvc->pvnLock, tvc); |
| 1105 | #endif |
| 1106 | } |
| 1107 | #if defined(AFS_SGI_ENV) |
| 1108 | AFS_RWUNLOCK((vnode_t *) tvc, VRWLOCK_WRITE); |
| 1109 | #endif |
| 1110 | #ifdef AFS_DARWIN80_ENV |
| 1111 | AFS_FAST_RELE(tvc)do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( tvc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1111);}while(0); if (--(((&(tvc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(tvc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 1112 | if (didCore) { |
| 1113 | AFS_RELE(AFSTOV(tvc))do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( tvc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1113);}while(0); if (--(((&(tvc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(tvc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 1114 | /* Matches write code setting CCore flag */ |
| 1115 | crfreeusr_crfree(cred); |
| 1116 | } |
| 1117 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 1118 | #else |
| 1119 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 1120 | AFS_FAST_RELE(tvc)do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( tvc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1120);}while(0); if (--(((&(tvc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(tvc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 1121 | if (didCore) { |
| 1122 | AFS_RELE(AFSTOV(tvc))do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( tvc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1122);}while(0); if (--(((&(tvc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(tvc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 1123 | /* Matches write code setting CCore flag */ |
| 1124 | crfreeusr_crfree(cred); |
| 1125 | } |
| 1126 | #endif |
| 1127 | } |
| 1128 | } |
| 1129 | } |
| 1130 | ReleaseReadLock(&afs_xvcache)do { ; if (!(--((&afs_xvcache)->readers_reading)) && (&afs_xvcache)->wait_states) Afs_Lock_ReleaseW(&afs_xvcache ) ; if ( (&afs_xvcache)->pid_last_reader == (get_user_struct ()->u_procp->p_pid ) ) (&afs_xvcache)->pid_last_reader =0; } while (0); |
| 1131 | } |
| 1132 | |
| 1133 | |
| 1134 | |
| 1135 | /*! |
| 1136 | * Make sure a cache entry is up-to-date status-wise. |
| 1137 | * |
| 1138 | * NOTE: everywhere that calls this can potentially be sped up |
| 1139 | * by checking CStatd first, and avoiding doing the InitReq |
| 1140 | * if this is up-to-date. |
| 1141 | * |
| 1142 | * Anymore, the only places that call this KNOW already that the |
| 1143 | * vcache is not up-to-date, so we don't screw around. |
| 1144 | * |
| 1145 | * \param avc : Ptr to vcache entry to verify. |
| 1146 | * \param areq : ??? |
| 1147 | */ |
| 1148 | |
| 1149 | /*! |
| 1150 | * |
| 1151 | * Make sure a cache entry is up-to-date status-wise. |
| 1152 | * |
| 1153 | * NOTE: everywhere that calls this can potentially be sped up |
| 1154 | * by checking CStatd first, and avoiding doing the InitReq |
| 1155 | * if this is up-to-date. |
| 1156 | * |
| 1157 | * Anymore, the only places that call this KNOW already that the |
| 1158 | * vcache is not up-to-date, so we don't screw around. |
| 1159 | * |
| 1160 | * \param avc Pointer to vcache entry to verify. |
| 1161 | * \param areq |
| 1162 | * |
| 1163 | * \return 0 for success or other error codes. |
| 1164 | */ |
| 1165 | int |
| 1166 | afs_VerifyVCache2(struct vcache *avc, struct vrequest *areq) |
| 1167 | { |
| 1168 | struct vcache *tvc; |
| 1169 | |
| 1170 | AFS_STATCNT(afs_VerifyVCache)((afs_cmstats.callInfo.C_afs_VerifyVCache)++); |
| 1171 | |
| 1172 | /* otherwise we must fetch the status info */ |
| 1173 | |
| 1174 | ObtainWriteLock(&avc->lock, 53)do { ; if (!(&avc->lock)->excl_locked && !( &avc->lock)->readers_reading) (&avc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&avc->lock, 2); (&avc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&avc->lock)->src_indicator = 53 ; } while (0); |
| 1175 | if (avc->f.states & CStatd0x00000001) { |
| 1176 | ReleaseWriteLock(&avc->lock)do { ; (&avc->lock)->excl_locked &= ~2; if ((& avc->lock)->wait_states) Afs_Lock_ReleaseR(&avc-> lock); (&avc->lock)->pid_writer=0; } while (0); |
| 1177 | return 0; |
| 1178 | } |
| 1179 | ObtainWriteLock(&afs_xcbhash, 461)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 461; } while (0); |
| 1180 | avc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 1181 | avc->callback = NULL((void *)0); |
| 1182 | afs_DequeueCallback(avc); |
| 1183 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 1184 | ReleaseWriteLock(&avc->lock)do { ; (&avc->lock)->excl_locked &= ~2; if ((& avc->lock)->wait_states) Afs_Lock_ReleaseR(&avc-> lock); (&avc->lock)->pid_writer=0; } while (0); |
| 1185 | |
| 1186 | /* since we've been called back, or the callback has expired, |
| 1187 | * it's possible that the contents of this directory, or this |
| 1188 | * file's name have changed, thus invalidating the dnlc contents. |
| 1189 | */ |
| 1190 | if ((avc->f.states & CForeign0x00002000) || (avc->f.fidusr_fid.Fid.Vnode & 1)) |
| 1191 | osi_dnlc_purgedp(avc); |
| 1192 | else |
| 1193 | osi_dnlc_purgevp(avc); |
| 1194 | |
| 1195 | /* fetch the status info */ |
| 1196 | tvc = afs_GetVCache(&avc->f.fidusr_fid, areq, NULL((void *)0), avc); |
| 1197 | if (!tvc) |
| 1198 | return ENOENT2; |
| 1199 | /* Put it back; caller has already incremented vrefCount */ |
| 1200 | afs_PutVCache(tvc); |
| 1201 | return 0; |
| 1202 | |
| 1203 | } /*afs_VerifyVCache */ |
| 1204 | |
| 1205 | |
| 1206 | /*! |
| 1207 | * Simple copy of stat info into cache. |
| 1208 | * |
| 1209 | * Callers:as of 1992-04-29, only called by WriteVCache |
| 1210 | * |
| 1211 | * \param avc Ptr to vcache entry involved. |
| 1212 | * \param astat Ptr to stat info to copy. |
| 1213 | * |
| 1214 | */ |
| 1215 | static void |
| 1216 | afs_SimpleVStat(struct vcache *avc, |
| 1217 | struct AFSFetchStatus *astat, struct vrequest *areq) |
| 1218 | { |
| 1219 | afs_size_t length; |
| 1220 | AFS_STATCNT(afs_SimpleVStat)((afs_cmstats.callInfo.C_afs_SimpleVStat)++); |
| 1221 | |
| 1222 | #ifdef AFS_64BIT_CLIENT |
| 1223 | FillInt64(length, astat->Length_hi, astat->Length)(length) = ((afs_int64)(astat->Length_hi) << 32) | ( astat->Length);; |
| 1224 | #else /* AFS_64BIT_CLIENT */ |
| 1225 | length = astat->Length; |
| 1226 | #endif /* AFS_64BIT_CLIENT */ |
| 1227 | |
| 1228 | #if defined(AFS_SGI_ENV) |
| 1229 | if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)((avc)->f.states & 0x00000020) |
| 1230 | && !AFS_VN_MAPPED((vnode_t *) avc)) { |
| 1231 | osi_Assert((valusema(&avc->vc_rwlock) <= 0)(void)(((valusema(&avc->vc_rwlock) <= 0) && (OSI_GET_LOCKID() == avc->vc_rwlockid)) || (osi_AssertFailK ( "(valusema(&avc->vc_rwlock) <= 0) && (OSI_GET_LOCKID() == avc->vc_rwlockid)" , "/home/wollman/openafs/src/afs/afs_vcache.c", 1232), 0)) |
| 1232 | && (OSI_GET_LOCKID() == avc->vc_rwlockid))(void)(((valusema(&avc->vc_rwlock) <= 0) && (OSI_GET_LOCKID() == avc->vc_rwlockid)) || (osi_AssertFailK ( "(valusema(&avc->vc_rwlock) <= 0) && (OSI_GET_LOCKID() == avc->vc_rwlockid)" , "/home/wollman/openafs/src/afs/afs_vcache.c", 1232), 0)); |
| 1233 | if (length < avc->f.m.Length) { |
| 1234 | vnode_t *vp = (vnode_t *) avc; |
| 1235 | |
| 1236 | osi_Assert(WriteLocked(&avc->lock))(void)((((&avc->lock)->excl_locked & 2)) || (osi_AssertFailK ( "WriteLocked(&avc->lock)" , "/home/wollman/openafs/src/afs/afs_vcache.c" , 1236), 0)); |
| 1237 | ReleaseWriteLock(&avc->lock)do { ; (&avc->lock)->excl_locked &= ~2; if ((& avc->lock)->wait_states) Afs_Lock_ReleaseR(&avc-> lock); (&avc->lock)->pid_writer=0; } while (0); |
| 1238 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1238);}while(0); } while(0); |
| 1239 | PTOSSVP(vp, (off_t) length, (off_t) MAXLONG); |
| 1240 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1240);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 1241 | ObtainWriteLock(&avc->lock, 67)do { ; if (!(&avc->lock)->excl_locked && !( &avc->lock)->readers_reading) (&avc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&avc->lock, 2); (&avc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&avc->lock)->src_indicator = 67 ; } while (0); |
| 1242 | } |
| 1243 | } |
| 1244 | #endif |
| 1245 | |
| 1246 | if (!afs_DirtyPages(avc)((avc)->f.states & 0x00000020)) { |
| 1247 | /* if actively writing the file, don't fetch over this value */ |
| 1248 | afs_Trace3(afs_iclSetp, CM_TRACE_SIMPLEVSTAT, ICL_TYPE_POINTER, avc,(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event3(afs_iclSetp, (701087759L), (1<<24)+((2) <<18)+((8)<<12)+((8)<<6), (long)(avc), (long )((avc->f.m.Length)), (long)((length))) : 0) |
| 1249 | ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event3(afs_iclSetp, (701087759L), (1<<24)+((2) <<18)+((8)<<12)+((8)<<6), (long)(avc), (long )((avc->f.m.Length)), (long)((length))) : 0) |
| 1250 | ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length))(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event3(afs_iclSetp, (701087759L), (1<<24)+((2) <<18)+((8)<<12)+((8)<<6), (long)(avc), (long )((avc->f.m.Length)), (long)((length))) : 0); |
| 1251 | avc->f.m.Length = length; |
| 1252 | avc->f.m.Date = astat->ClientModTime; |
| 1253 | } |
| 1254 | avc->f.m.Owner = astat->Owner; |
| 1255 | avc->f.m.Group = astat->Group; |
| 1256 | avc->f.m.Mode = astat->UnixModeBits; |
| 1257 | if (vType(avc)(avc)->v.v_type == VREG0100000) { |
| 1258 | avc->f.m.Mode |= S_IFREG0100000; |
| 1259 | } else if (vType(avc)(avc)->v.v_type == VDIR0040000) { |
| 1260 | avc->f.m.Mode |= S_IFDIR0040000; |
| 1261 | } else if (vType(avc)(avc)->v.v_type == VLNK0120000) { |
| 1262 | avc->f.m.Mode |= S_IFLNK0120000; |
| 1263 | if ((avc->f.m.Mode & 0111) == 0) |
| 1264 | avc->mvstat = 1; |
| 1265 | } |
| 1266 | if (avc->f.states & CForeign0x00002000) { |
| 1267 | struct axscache *ac; |
| 1268 | avc->f.anyAccess = astat->AnonymousAccess; |
| 1269 | #ifdef badidea |
| 1270 | if ((astat->CallerAccess & ~astat->AnonymousAccess)) |
| 1271 | /* USED TO SAY : |
| 1272 | * Caller has at least one bit not covered by anonymous, and |
| 1273 | * thus may have interesting rights. |
| 1274 | * |
| 1275 | * HOWEVER, this is a really bad idea, because any access query |
| 1276 | * for bits which aren't covered by anonymous, on behalf of a user |
| 1277 | * who doesn't have any special rights, will result in an answer of |
| 1278 | * the form "I don't know, lets make a FetchStatus RPC and find out!" |
| 1279 | * It's an especially bad idea under Ultrix, since (due to the lack of |
| 1280 | * a proper access() call) it must perform several afs_access() calls |
| 1281 | * in order to create magic mode bits that vary according to who makes |
| 1282 | * the call. In other words, _every_ stat() generates a test for |
| 1283 | * writeability... |
| 1284 | */ |
| 1285 | #endif /* badidea */ |
| 1286 | if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)(((avc->Access)->uid == areq->uid) ? (avc->Access ) : afs_SlowFindAxs(&(avc->Access),(areq->uid))))) |
| 1287 | ac->axess = astat->CallerAccess; |
| 1288 | else /* not found, add a new one if possible */ |
| 1289 | afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess){ struct axscache *ac; if ((ac = axs_Alloc())) { ac->uid = (areq->uid); ac->axess = (afs_int32)(astat->CallerAccess ); ac->next = (avc->Access); avc->Access = ac; }}; |
| 1290 | } |
| 1291 | |
| 1292 | } /*afs_SimpleVStat */ |
| 1293 | |
| 1294 | |
| 1295 | /*! |
| 1296 | * Store the status info *only* back to the server for a |
| 1297 | * fid/vrequest. |
| 1298 | * |
| 1299 | * Environment: Must be called with a shared lock held on the vnode. |
| 1300 | * |
| 1301 | * \param avc Ptr to the vcache entry. |
| 1302 | * \param astatus Ptr to the status info to store. |
| 1303 | * \param areq Ptr to the associated vrequest. |
| 1304 | * |
| 1305 | * \return Operation status. |
| 1306 | */ |
| 1307 | |
| 1308 | int |
| 1309 | afs_WriteVCache(struct vcache *avc, |
| 1310 | struct AFSStoreStatus *astatus, |
| 1311 | struct vrequest *areq) |
| 1312 | { |
| 1313 | afs_int32 code; |
| 1314 | struct afs_conn *tc; |
| 1315 | struct AFSFetchStatus OutStatus; |
| 1316 | struct AFSVolSync tsync; |
| 1317 | struct rx_connection *rxconn; |
| 1318 | XSTATS_DECLSstruct afs_stats_opTimingData *opP = ((void *)0); osi_timeval_t opStartTime = { 0, 0}, opStopTime, elapsedTime; |
| 1319 | AFS_STATCNT(afs_WriteVCache)((afs_cmstats.callInfo.C_afs_WriteVCache)++); |
| 1320 | afs_Trace2(afs_iclSetp, CM_TRACE_WVCACHE, ICL_TYPE_POINTER, avc,(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event2(afs_iclSetp, (701087755L), (1<<24)+((2) <<18)+((8)<<12), (long)(avc), (long)((avc->f.m .Length))) : 0) |
| 1321 | ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length))(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event2(afs_iclSetp, (701087755L), (1<<24)+((2) <<18)+((8)<<12), (long)(avc), (long)((avc->f.m .Length))) : 0); |
| 1322 | do { |
| 1323 | tc = afs_Conn(&avc->f.fidusr_fid, areq, SHARED_LOCK4, &rxconn); |
| 1324 | if (tc) { |
| 1325 | XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS)opP = &(afs_stats_cmfullperf.rpc.fsRPCTimes[5]); osi_GetTime (&opStartTime);; |
| 1326 | RX_AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1326);}while(0); } while(0); |
| 1327 | code = |
| 1328 | RXAFS_StoreStatus(rxconn, (struct AFSFid *)&avc->f.fidusr_fid.Fid, |
| 1329 | astatus, &OutStatus, &tsync); |
| 1330 | RX_AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1330);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 1331 | XSTATS_END_TIMEosi_GetTime(&opStopTime); (opP->numOps)++; if (!code) { (opP->numSuccesses)++; { if (opStopTime.tv_usec < opStartTime .tv_usec) { opStopTime.tv_usec += 1000000; opStopTime.tv_sec -= 1; } elapsedTime.tv_sec = opStopTime.tv_sec - opStartTime.tv_sec ; elapsedTime.tv_usec = opStopTime.tv_usec - opStartTime.tv_usec ; }; { (opP->sumTime).tv_sec += elapsedTime.tv_sec; (opP-> sumTime).tv_usec += elapsedTime.tv_usec; if ((opP->sumTime ).tv_usec > 1000000) { (opP->sumTime).tv_usec -= 1000000 ; (opP->sumTime).tv_sec++; } }; { if(elapsedTime.tv_sec > 0 ) { (opP->sqrTime).tv_sec += elapsedTime.tv_sec * elapsedTime .tv_sec + 2 * elapsedTime.tv_sec * elapsedTime.tv_usec /1000000 ; (opP->sqrTime).tv_usec += (2 * elapsedTime.tv_sec * elapsedTime .tv_usec) % 1000000 + (elapsedTime.tv_usec / 1000)*(elapsedTime .tv_usec / 1000) + 2 * (elapsedTime.tv_usec / 1000) * (elapsedTime .tv_usec % 1000) / 1000 + (((elapsedTime.tv_usec % 1000) > 707) ? 1 : 0); } else { (opP->sqrTime).tv_usec += (elapsedTime .tv_usec / 1000)*(elapsedTime.tv_usec / 1000) + 2 * (elapsedTime .tv_usec / 1000) * (elapsedTime.tv_usec % 1000) / 1000 + (((elapsedTime .tv_usec % 1000) > 707) ? 1 : 0); } if ((opP->sqrTime). tv_usec > 1000000) { (opP->sqrTime).tv_usec -= 1000000; (opP->sqrTime).tv_sec++; } }; if (((elapsedTime.tv_sec < (opP->minTime).tv_sec) ? 1 : (elapsedTime.tv_sec > (opP ->minTime).tv_sec) ? 0 : (elapsedTime.tv_usec < (opP-> minTime).tv_usec) ? 1 : 0)) { { (opP->minTime).tv_sec = elapsedTime .tv_sec; (opP->minTime).tv_usec = elapsedTime.tv_usec; }; } if (((elapsedTime.tv_sec > (opP->maxTime).tv_sec) ? 1 : (elapsedTime.tv_sec < (opP->maxTime).tv_sec) ? 0 : (elapsedTime .tv_usec > (opP->maxTime).tv_usec) ? 1 : 0)) { { (opP-> maxTime).tv_sec = elapsedTime.tv_sec; (opP->maxTime).tv_usec = elapsedTime.tv_usec; }; } }; |
| 1332 | } else |
| 1333 | code = -1; |
| 1334 | } while (afs_Analyze |
| 1335 | (tc, rxconn, code, &avc->f.fidusr_fid, areq, AFS_STATS_FS_RPCIDX_STORESTATUS5, |
| 1336 | SHARED_LOCK4, NULL((void *)0))); |
| 1337 | |
| 1338 | UpgradeSToWLock(&avc->lock, 20)do { ; if (!(&avc->lock)->readers_reading) (&avc ->lock)->excl_locked = 2; else Afs_Lock_Obtain(&avc ->lock, 6); (&avc->lock)->pid_writer = (get_user_struct ()->u_procp->p_pid ); (&avc->lock)->src_indicator = 20; } while (0); |
| 1339 | if (code == 0) { |
| 1340 | /* success, do the changes locally */ |
| 1341 | afs_SimpleVStat(avc, &OutStatus, areq); |
| 1342 | /* |
| 1343 | * Update the date, too. SimpleVStat didn't do this, since |
| 1344 | * it thought we were doing this after fetching new status |
| 1345 | * over a file being written. |
| 1346 | */ |
| 1347 | avc->f.m.Date = OutStatus.ClientModTime; |
| 1348 | } else { |
| 1349 | /* failure, set up to check with server next time */ |
| 1350 | ObtainWriteLock(&afs_xcbhash, 462)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 462; } while (0); |
| 1351 | afs_DequeueCallback(avc); |
| 1352 | avc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); /* turn off stat valid flag */ |
| 1353 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 1354 | if ((avc->f.states & CForeign0x00002000) || (avc->f.fidusr_fid.Fid.Vnode & 1)) |
| 1355 | osi_dnlc_purgedp(avc); /* if it (could be) a directory */ |
| 1356 | } |
| 1357 | ConvertWToSLock(&avc->lock)do { ; (&avc->lock)->excl_locked = 4; if((&avc-> lock)->wait_states) Afs_Lock_ReleaseR(&avc->lock); } while (0); |
| 1358 | return code; |
| 1359 | |
| 1360 | } /*afs_WriteVCache */ |
| 1361 | |
| 1362 | /*! |
| 1363 | * Store status info only locally, set the proper disconnection flags |
| 1364 | * and add to dirty list. |
| 1365 | * |
| 1366 | * \param avc The vcache to be written locally. |
| 1367 | * \param astatus Get attr fields from local store. |
| 1368 | * \param attrs This one is only of the vs_size. |
| 1369 | * |
| 1370 | * \note Must be called with a shared lock on the vnode |
| 1371 | */ |
| 1372 | int |
| 1373 | afs_WriteVCacheDiscon(struct vcache *avc, |
| 1374 | struct AFSStoreStatus *astatus, |
| 1375 | struct vattrusr_vattr *attrs) |
| 1376 | { |
| 1377 | afs_int32 code = 0; |
| 1378 | afs_int32 flags = 0; |
| 1379 | |
| 1380 | UpgradeSToWLock(&avc->lock, 700)do { ; if (!(&avc->lock)->readers_reading) (&avc ->lock)->excl_locked = 2; else Afs_Lock_Obtain(&avc ->lock, 6); (&avc->lock)->pid_writer = (get_user_struct ()->u_procp->p_pid ); (&avc->lock)->src_indicator = 700; } while (0); |
| 1381 | |
| 1382 | if (!astatus->Mask) { |
| 1383 | |
| 1384 | return code; |
| 1385 | |
| 1386 | } else { |
| 1387 | |
| 1388 | /* Set attributes. */ |
| 1389 | if (astatus->Mask & AFS_SETMODTIME1) { |
| 1390 | avc->f.m.Date = astatus->ClientModTime; |
| 1391 | flags |= VDisconSetTime0x00000001; |
| 1392 | } |
| 1393 | |
| 1394 | if (astatus->Mask & AFS_SETOWNER2) { |
| 1395 | /* printf("Not allowed yet. \n"); */ |
| 1396 | /*avc->f.m.Owner = astatus->Owner;*/ |
| 1397 | } |
| 1398 | |
| 1399 | if (astatus->Mask & AFS_SETGROUP4) { |
| 1400 | /* printf("Not allowed yet. \n"); */ |
| 1401 | /*avc->f.m.Group = astatus->Group;*/ |
| 1402 | } |
| 1403 | |
| 1404 | if (astatus->Mask & AFS_SETMODE8) { |
| 1405 | avc->f.m.Mode = astatus->UnixModeBits; |
| 1406 | |
| 1407 | #if 0 /* XXX: Leaving this out, so it doesn't mess up the file type flag.*/ |
| 1408 | |
| 1409 | if (vType(avc)(avc)->v.v_type == VREG0100000) { |
| 1410 | avc->f.m.Mode |= S_IFREG0100000; |
| 1411 | } else if (vType(avc)(avc)->v.v_type == VDIR0040000) { |
| 1412 | avc->f.m.Mode |= S_IFDIR0040000; |
| 1413 | } else if (vType(avc)(avc)->v.v_type == VLNK0120000) { |
| 1414 | avc->f.m.Mode |= S_IFLNK0120000; |
| 1415 | if ((avc->f.m.Mode & 0111) == 0) |
| 1416 | avc->mvstat = 1; |
| 1417 | } |
| 1418 | #endif |
| 1419 | flags |= VDisconSetMode0x00000002; |
| 1420 | } /* if(astatus.Mask & AFS_SETMODE) */ |
| 1421 | |
| 1422 | } /* if (!astatus->Mask) */ |
| 1423 | |
| 1424 | if (attrs->va_size > 0) { |
| 1425 | /* XXX: Do I need more checks? */ |
| 1426 | /* Truncation operation. */ |
| 1427 | flags |= VDisconTrunc0x00000020; |
| 1428 | } |
| 1429 | |
| 1430 | if (flags) |
| 1431 | afs_DisconAddDirty(avc, flags, 1); |
| 1432 | |
| 1433 | /* XXX: How about the rest of the fields? */ |
| 1434 | |
| 1435 | ConvertWToSLock(&avc->lock)do { ; (&avc->lock)->excl_locked = 4; if((&avc-> lock)->wait_states) Afs_Lock_ReleaseR(&avc->lock); } while (0); |
| 1436 | |
| 1437 | return code; |
| 1438 | } |
| 1439 | |
| 1440 | /*! |
| 1441 | * Copy astat block into vcache info |
| 1442 | * |
| 1443 | * \note This code may get dataversion and length out of sync if the file has |
| 1444 | * been modified. This is less than ideal. I haven't thought about it sufficiently |
| 1445 | * to be certain that it is adequate. |
| 1446 | * |
| 1447 | * \note Environment: Must be called under a write lock |
| 1448 | * |
| 1449 | * \param avc Ptr to vcache entry. |
| 1450 | * \param astat Ptr to stat block to copy in. |
| 1451 | * \param areq Ptr to associated request. |
| 1452 | */ |
| 1453 | void |
| 1454 | afs_ProcessFS(struct vcache *avc, |
| 1455 | struct AFSFetchStatus *astat, struct vrequest *areq) |
| 1456 | { |
| 1457 | afs_size_t length; |
| 1458 | #ifdef AFS_DARWIN80_ENV |
| 1459 | int fixup = 0; |
| 1460 | #endif |
| 1461 | AFS_STATCNT(afs_ProcessFS)((afs_cmstats.callInfo.C_afs_ProcessFS)++); |
| 1462 | |
| 1463 | #ifdef AFS_64BIT_CLIENT |
| 1464 | FillInt64(length, astat->Length_hi, astat->Length)(length) = ((afs_int64)(astat->Length_hi) << 32) | ( astat->Length);; |
| 1465 | #else /* AFS_64BIT_CLIENT */ |
| 1466 | length = astat->Length; |
| 1467 | #endif /* AFS_64BIT_CLIENT */ |
| 1468 | /* WARNING: afs_DoBulkStat uses the Length field to store a sequence |
| 1469 | * number for each bulk status request. Under no circumstances |
| 1470 | * should afs_DoBulkStat store a sequence number if the new |
| 1471 | * length will be ignored when afs_ProcessFS is called with |
| 1472 | * new stats. If you change the following conditional then you |
| 1473 | * also need to change the conditional in afs_DoBulkStat. */ |
| 1474 | #ifdef AFS_SGI_ENV |
| 1475 | if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)((avc)->f.states & 0x00000020) |
| 1476 | && !AFS_VN_MAPPED((vnode_t *) avc)) { |
| 1477 | #else |
| 1478 | if ((avc->execsOrWriters <= 0) && !afs_DirtyPages(avc)((avc)->f.states & 0x00000020)) { |
| 1479 | #endif |
| 1480 | /* if we're writing or mapping this file, don't fetch over these |
| 1481 | * values. |
| 1482 | */ |
| 1483 | afs_Trace3(afs_iclSetp, CM_TRACE_PROCESSFS, ICL_TYPE_POINTER, avc,(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event3(afs_iclSetp, (701087760L), (1<<24)+((2) <<18)+((8)<<12)+((8)<<6), (long)(avc), (long )((avc->f.m.Length)), (long)((length))) : 0) |
| 1484 | ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length),(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event3(afs_iclSetp, (701087760L), (1<<24)+((2) <<18)+((8)<<12)+((8)<<6), (long)(avc), (long )((avc->f.m.Length)), (long)((length))) : 0) |
| 1485 | ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(length))(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event3(afs_iclSetp, (701087760L), (1<<24)+((2) <<18)+((8)<<12)+((8)<<6), (long)(avc), (long )((avc->f.m.Length)), (long)((length))) : 0); |
| 1486 | avc->f.m.Length = length; |
| 1487 | avc->f.m.Date = astat->ClientModTime; |
| 1488 | } |
| 1489 | hset64(avc->f.m.DataVersion, astat->dataVersionHigh, astat->DataVersion)((avc->f.m.DataVersion).high = (astat->dataVersionHigh) , (avc->f.m.DataVersion).low = (astat->DataVersion)); |
| 1490 | avc->f.m.Owner = astat->Owner; |
| 1491 | avc->f.m.Mode = astat->UnixModeBits; |
| 1492 | avc->f.m.Group = astat->Group; |
| 1493 | avc->f.m.LinkCount = astat->LinkCount; |
| 1494 | if (astat->FileType == File1) { |
| 1495 | #ifdef AFS_DARWIN80_ENV |
| 1496 | if (avc->f.m.Type != VREG0100000) |
| 1497 | fixup = 1; |
| 1498 | #endif |
| 1499 | vSetType(avc, VREG)(avc)->v.v_type = (0100000); |
| 1500 | avc->f.m.Mode |= S_IFREG0100000; |
| 1501 | } else if (astat->FileType == Directory2) { |
| 1502 | #ifdef AFS_DARWIN80_ENV |
| 1503 | if (avc->f.m.Type != VDIR0040000) |
| 1504 | fixup = 1; |
| 1505 | #endif |
| 1506 | vSetType(avc, VDIR)(avc)->v.v_type = (0040000); |
| 1507 | avc->f.m.Mode |= S_IFDIR0040000; |
| 1508 | } else if (astat->FileType == SymbolicLink3) { |
| 1509 | if (afs_fakestat_enable && (avc->f.m.Mode & 0111) == 0) { |
| 1510 | #ifdef AFS_DARWIN80_ENV |
| 1511 | if (avc->f.m.Type != VDIR0040000) |
| 1512 | fixup = 1; |
| 1513 | #endif |
| 1514 | vSetType(avc, VDIR)(avc)->v.v_type = (0040000); |
| 1515 | avc->f.m.Mode |= S_IFDIR0040000; |
| 1516 | } else { |
| 1517 | #ifdef AFS_DARWIN80_ENV |
| 1518 | if (avc->f.m.Type != VLNK0120000) |
| 1519 | fixup = 1; |
| 1520 | #endif |
| 1521 | vSetType(avc, VLNK)(avc)->v.v_type = (0120000); |
| 1522 | avc->f.m.Mode |= S_IFLNK0120000; |
| 1523 | } |
| 1524 | if ((avc->f.m.Mode & 0111) == 0) { |
| 1525 | avc->mvstat = 1; |
| 1526 | } |
| 1527 | } |
| 1528 | #ifdef AFS_DARWIN80_ENV |
| 1529 | if (fixup) { |
| 1530 | /* perform type correction on underlying vnode */ |
| 1531 | afs_darwin_finalizevnode(avc, NULL((void *)0), NULL((void *)0), 0, 1); |
| 1532 | /* re-acquire the usecount that finalizevnode disposed of */ |
| 1533 | vnode_ref(AFSTOV(avc)(&(avc)->v)); |
| 1534 | } |
| 1535 | #endif |
| 1536 | avc->f.anyAccess = astat->AnonymousAccess; |
| 1537 | #ifdef badidea |
| 1538 | if ((astat->CallerAccess & ~astat->AnonymousAccess)) |
| 1539 | /* USED TO SAY : |
| 1540 | * Caller has at least one bit not covered by anonymous, and |
| 1541 | * thus may have interesting rights. |
| 1542 | * |
| 1543 | * HOWEVER, this is a really bad idea, because any access query |
| 1544 | * for bits which aren't covered by anonymous, on behalf of a user |
| 1545 | * who doesn't have any special rights, will result in an answer of |
| 1546 | * the form "I don't know, lets make a FetchStatus RPC and find out!" |
| 1547 | * It's an especially bad idea under Ultrix, since (due to the lack of |
| 1548 | * a proper access() call) it must perform several afs_access() calls |
| 1549 | * in order to create magic mode bits that vary according to who makes |
| 1550 | * the call. In other words, _every_ stat() generates a test for |
| 1551 | * writeability... |
| 1552 | */ |
| 1553 | #endif /* badidea */ |
| 1554 | { |
| 1555 | struct axscache *ac; |
| 1556 | if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)(((avc->Access)->uid == areq->uid) ? (avc->Access ) : afs_SlowFindAxs(&(avc->Access),(areq->uid))))) |
| 1557 | ac->axess = astat->CallerAccess; |
| 1558 | else /* not found, add a new one if possible */ |
| 1559 | afs_AddAxs(avc->Access, areq->uid, astat->CallerAccess){ struct axscache *ac; if ((ac = axs_Alloc())) { ac->uid = (areq->uid); ac->axess = (afs_int32)(astat->CallerAccess ); ac->next = (avc->Access); avc->Access = ac; }}; |
| 1560 | } |
| 1561 | } /*afs_ProcessFS */ |
| 1562 | |
| 1563 | |
| 1564 | /*! |
| 1565 | * Get fid from server. |
| 1566 | * |
| 1567 | * \param afid |
| 1568 | * \param areq Request to be passed on. |
| 1569 | * \param name Name of ?? to lookup. |
| 1570 | * \param OutStatus Fetch status. |
| 1571 | * \param CallBackp |
| 1572 | * \param serverp |
| 1573 | * \param tsyncp |
| 1574 | * |
| 1575 | * \return Success status of operation. |
| 1576 | */ |
| 1577 | int |
| 1578 | afs_RemoteLookup(struct VenusFid *afid, struct vrequest *areq, |
| 1579 | char *name, struct VenusFid *nfid, |
| 1580 | struct AFSFetchStatus *OutStatusp, |
| 1581 | struct AFSCallBack *CallBackp, struct server **serverp, |
| 1582 | struct AFSVolSync *tsyncp) |
| 1583 | { |
| 1584 | afs_int32 code; |
| 1585 | struct afs_conn *tc; |
| 1586 | struct rx_connection *rxconn; |
| 1587 | struct AFSFetchStatus OutDirStatus; |
| 1588 | XSTATS_DECLSstruct afs_stats_opTimingData *opP = ((void *)0); osi_timeval_t opStartTime = { 0, 0}, opStopTime, elapsedTime; |
| 1589 | if (!name) |
| 1590 | name = ""; /* XXX */ |
| 1591 | do { |
| 1592 | tc = afs_Conn(afid, areq, SHARED_LOCK4, &rxconn); |
| 1593 | if (tc) { |
| 1594 | if (serverp) |
| 1595 | *serverp = tc->parent->srvr->server; |
| 1596 | XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_XLOOKUP)opP = &(afs_stats_cmfullperf.rpc.fsRPCTimes[28]); osi_GetTime (&opStartTime);; |
| 1597 | RX_AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1597);}while(0); } while(0); |
| 1598 | code = |
| 1599 | RXAFS_Lookup(rxconn, (struct AFSFid *)&afid->Fid, name, |
| 1600 | (struct AFSFid *)&nfid->Fid, OutStatusp, |
| 1601 | &OutDirStatus, CallBackp, tsyncp); |
| 1602 | RX_AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1602);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 1603 | XSTATS_END_TIMEosi_GetTime(&opStopTime); (opP->numOps)++; if (!code) { (opP->numSuccesses)++; { if (opStopTime.tv_usec < opStartTime .tv_usec) { opStopTime.tv_usec += 1000000; opStopTime.tv_sec -= 1; } elapsedTime.tv_sec = opStopTime.tv_sec - opStartTime.tv_sec ; elapsedTime.tv_usec = opStopTime.tv_usec - opStartTime.tv_usec ; }; { (opP->sumTime).tv_sec += elapsedTime.tv_sec; (opP-> sumTime).tv_usec += elapsedTime.tv_usec; if ((opP->sumTime ).tv_usec > 1000000) { (opP->sumTime).tv_usec -= 1000000 ; (opP->sumTime).tv_sec++; } }; { if(elapsedTime.tv_sec > 0 ) { (opP->sqrTime).tv_sec += elapsedTime.tv_sec * elapsedTime .tv_sec + 2 * elapsedTime.tv_sec * elapsedTime.tv_usec /1000000 ; (opP->sqrTime).tv_usec += (2 * elapsedTime.tv_sec * elapsedTime .tv_usec) % 1000000 + (elapsedTime.tv_usec / 1000)*(elapsedTime .tv_usec / 1000) + 2 * (elapsedTime.tv_usec / 1000) * (elapsedTime .tv_usec % 1000) / 1000 + (((elapsedTime.tv_usec % 1000) > 707) ? 1 : 0); } else { (opP->sqrTime).tv_usec += (elapsedTime .tv_usec / 1000)*(elapsedTime.tv_usec / 1000) + 2 * (elapsedTime .tv_usec / 1000) * (elapsedTime.tv_usec % 1000) / 1000 + (((elapsedTime .tv_usec % 1000) > 707) ? 1 : 0); } if ((opP->sqrTime). tv_usec > 1000000) { (opP->sqrTime).tv_usec -= 1000000; (opP->sqrTime).tv_sec++; } }; if (((elapsedTime.tv_sec < (opP->minTime).tv_sec) ? 1 : (elapsedTime.tv_sec > (opP ->minTime).tv_sec) ? 0 : (elapsedTime.tv_usec < (opP-> minTime).tv_usec) ? 1 : 0)) { { (opP->minTime).tv_sec = elapsedTime .tv_sec; (opP->minTime).tv_usec = elapsedTime.tv_usec; }; } if (((elapsedTime.tv_sec > (opP->maxTime).tv_sec) ? 1 : (elapsedTime.tv_sec < (opP->maxTime).tv_sec) ? 0 : (elapsedTime .tv_usec > (opP->maxTime).tv_usec) ? 1 : 0)) { { (opP-> maxTime).tv_sec = elapsedTime.tv_sec; (opP->maxTime).tv_usec = elapsedTime.tv_usec; }; } }; |
| 1604 | } else |
| 1605 | code = -1; |
| 1606 | } while (afs_Analyze |
| 1607 | (tc, rxconn, code, afid, areq, AFS_STATS_FS_RPCIDX_XLOOKUP28, SHARED_LOCK4, |
| 1608 | NULL((void *)0))); |
| 1609 | |
| 1610 | return code; |
| 1611 | } |
| 1612 | |
| 1613 | |
| 1614 | /*! |
| 1615 | * afs_GetVCache |
| 1616 | * |
| 1617 | * Given a file id and a vrequest structure, fetch the status |
| 1618 | * information associated with the file. |
| 1619 | * |
| 1620 | * \param afid File ID. |
| 1621 | * \param areq Ptr to associated vrequest structure, specifying the |
| 1622 | * user whose authentication tokens will be used. |
| 1623 | * \param avc Caller may already have a vcache for this file, which is |
| 1624 | * already held. |
| 1625 | * |
| 1626 | * \note Environment: |
| 1627 | * The cache entry is returned with an increased vrefCount field. |
| 1628 | * The entry must be discarded by calling afs_PutVCache when you |
| 1629 | * are through using the pointer to the cache entry. |
| 1630 | * |
| 1631 | * You should not hold any locks when calling this function, except |
| 1632 | * locks on other vcache entries. If you lock more than one vcache |
| 1633 | * entry simultaneously, you should lock them in this order: |
| 1634 | * |
| 1635 | * 1. Lock all files first, then directories. |
| 1636 | * 2. Within a particular type, lock entries in Fid.Vnode order. |
| 1637 | * |
| 1638 | * This locking hierarchy is convenient because it allows locking |
| 1639 | * of a parent dir cache entry, given a file (to check its access |
| 1640 | * control list). It also allows renames to be handled easily by |
| 1641 | * locking directories in a constant order. |
| 1642 | * |
| 1643 | * \note NB. NewVCache -> FlushVCache presently (4/10/95) drops the xvcache lock. |
| 1644 | * |
| 1645 | * \note Might have a vcache structure already, which must |
| 1646 | * already be held by the caller |
| 1647 | */ |
| 1648 | struct vcache * |
| 1649 | afs_GetVCache(struct VenusFid *afid, struct vrequest *areq, |
| 1650 | afs_int32 * cached, struct vcache *avc) |
| 1651 | { |
| 1652 | |
| 1653 | afs_int32 code, newvcache = 0; |
| 1654 | struct vcache *tvc; |
| 1655 | struct volume *tvp; |
| 1656 | afs_int32 retry; |
| 1657 | |
| 1658 | AFS_STATCNT(afs_GetVCache)((afs_cmstats.callInfo.C_afs_GetVCache)++); |
| 1659 | |
| 1660 | if (cached) |
| 1661 | *cached = 0; /* Init just in case */ |
| 1662 | |
| 1663 | #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV) |
| 1664 | loop: |
| 1665 | #endif |
| 1666 | |
| 1667 | ObtainSharedLock(&afs_xvcache, 5)do { ; if (!(&afs_xvcache)->excl_locked) (&afs_xvcache ) -> excl_locked = 4; else Afs_Lock_Obtain(&afs_xvcache , 4); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 5 ; } while (0); |
| 1668 | |
| 1669 | tvc = afs_FindVCache(afid, &retry, DO_STATS1 | DO_VLRU2 | IS_SLOCK4); |
| 1670 | if (tvc && retry) { |
| 1671 | #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV) |
| 1672 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 1673 | spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD); |
| 1674 | goto loop; |
| 1675 | #endif |
| 1676 | } |
| 1677 | if (tvc) { |
| 1678 | if (cached) |
| 1679 | *cached = 1; |
| 1680 | osi_Assert((tvc->f.states & CVInit) == 0)(void)(((tvc->f.states & 0x10000000) == 0) || (osi_AssertFailK ( "(tvc->f.states & CVInit) == 0" , "/home/wollman/openafs/src/afs/afs_vcache.c" , 1680), 0)); |
| 1681 | /* If we are in readdir, return the vnode even if not statd */ |
| 1682 | if ((tvc->f.states & CStatd0x00000001) || afs_InReadDir(tvc)(((tvc)->f.states & 0x00004000) && (tvc)->readdir_pid == ((get_user_struct()->u_procp->p_pid )))) { |
| 1683 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 1684 | return tvc; |
| 1685 | } |
| 1686 | } else { |
| 1687 | UpgradeSToWLock(&afs_xvcache, 21)do { ; if (!(&afs_xvcache)->readers_reading) (&afs_xvcache )->excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 6); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 21 ; } while (0); |
| 1688 | |
| 1689 | /* no cache entry, better grab one */ |
| 1690 | tvc = afs_NewVCache(afid, NULL((void *)0)); |
| 1691 | newvcache = 1; |
| 1692 | |
| 1693 | ConvertWToSLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked = 4; if((&afs_xvcache )->wait_states) Afs_Lock_ReleaseR(&afs_xvcache); } while (0); |
| 1694 | if (tvc == NULL((void *)0)) |
| 1695 | { |
| 1696 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 1697 | return NULL((void *)0); |
| 1698 | } |
| 1699 | |
| 1700 | afs_stats_cmperf.vcacheMisses++; |
| 1701 | } |
| 1702 | |
| 1703 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 1704 | |
| 1705 | ObtainWriteLock(&tvc->lock, 54)do { ; if (!(&tvc->lock)->excl_locked && !( &tvc->lock)->readers_reading) (&tvc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&tvc->lock, 2); (&tvc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&tvc->lock)->src_indicator = 54 ; } while (0); |
| 1706 | |
| 1707 | if (tvc->f.states & CStatd0x00000001) { |
| 1708 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 1709 | return tvc; |
| 1710 | } |
| 1711 | #ifdef AFS_DARWIN80_ENV |
| 1712 | /* Darwin 8.0 only has bufs in nfs, so we shouldn't have to worry about them. |
| 1713 | What about ubc? */ |
| 1714 | #else |
| 1715 | #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV) |
| 1716 | /* |
| 1717 | * XXX - I really don't like this. Should try to understand better. |
| 1718 | * It seems that sometimes, when we get called, we already hold the |
| 1719 | * lock on the vnode (e.g., from afs_getattr via afs_VerifyVCache). |
| 1720 | * We can't drop the vnode lock, because that could result in a race. |
| 1721 | * Sometimes, though, we get here and don't hold the vnode lock. |
| 1722 | * I hate code paths that sometimes hold locks and sometimes don't. |
| 1723 | * In any event, the dodge we use here is to check whether the vnode |
| 1724 | * is locked, and if it isn't, then we gain and drop it around the call |
| 1725 | * to vinvalbuf; otherwise, we leave it alone. |
| 1726 | */ |
| 1727 | { |
| 1728 | struct vnodeusr_vnode *vp = AFSTOV(tvc)(&(tvc)->v); |
| 1729 | int iheldthelock; |
| 1730 | |
| 1731 | #if defined(AFS_DARWIN_ENV) |
| 1732 | iheldthelock = VOP_ISLOCKED(vp); |
| 1733 | if (!iheldthelock) |
| 1734 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, current_proc()); |
| 1735 | /* this is messy. we can call fsync which will try to reobtain this */ |
| 1736 | if (VTOAFS(vp)((struct vcache *)(vp)) == tvc) |
| 1737 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 1738 | if (UBCINFOEXISTS(vp)) { |
| 1739 | vinvalbuf(vp, V_SAVE, &afs_osi_cred, current_proc(), PINOD, 0); |
| 1740 | } |
| 1741 | if (VTOAFS(vp)((struct vcache *)(vp)) == tvc) |
| 1742 | ObtainWriteLock(&tvc->lock, 954)do { ; if (!(&tvc->lock)->excl_locked && !( &tvc->lock)->readers_reading) (&tvc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&tvc->lock, 2); (&tvc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&tvc->lock)->src_indicator = 954 ; } while (0); |
| 1743 | if (!iheldthelock) |
| 1744 | VOP_UNLOCK(vp, LK_EXCLUSIVE, current_proc()); |
| 1745 | #elif defined(AFS_FBSD80_ENV) |
| 1746 | iheldthelock = VOP_ISLOCKED(vp); |
| 1747 | if (!iheldthelock) { |
| 1748 | /* nosleep/sleep lock order reversal */ |
| 1749 | int glocked = ISAFS_GLOCK()(pthread_self() == afs_global_owner); |
| 1750 | if (glocked) |
| 1751 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1751);}while(0); } while(0); |
| 1752 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); |
| 1753 | if (glocked) |
| 1754 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1754);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 1755 | } |
| 1756 | vinvalbuf(vp, V_SAVE, PINOD, 0); /* changed late in 8.0-CURRENT */ |
| 1757 | if (!iheldthelock) |
| 1758 | VOP_UNLOCK(vp, 0); |
| 1759 | #elif defined(AFS_FBSD60_ENV) |
| 1760 | iheldthelock = VOP_ISLOCKED(vp, curthread); |
| 1761 | if (!iheldthelock) |
| 1762 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread); |
| 1763 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1763);}while(0); } while(0); |
| 1764 | vinvalbuf(vp, V_SAVE, curthread, PINOD, 0); |
| 1765 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 1765);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 1766 | if (!iheldthelock) |
| 1767 | VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread); |
| 1768 | #elif defined(AFS_FBSD_ENV) |
| 1769 | iheldthelock = VOP_ISLOCKED(vp, curthread); |
| 1770 | if (!iheldthelock) |
| 1771 | vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread); |
| 1772 | vinvalbuf(vp, V_SAVE, osi_curcred()get_user_struct()->u_cred, curthread, PINOD, 0); |
| 1773 | if (!iheldthelock) |
| 1774 | VOP_UNLOCK(vp, LK_EXCLUSIVE, curthread); |
| 1775 | #elif defined(AFS_OBSD_ENV) |
| 1776 | iheldthelock = VOP_ISLOCKED(vp, curproc); |
| 1777 | if (!iheldthelock) |
| 1778 | VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY, curproc); |
| 1779 | uvm_vnp_uncache(vp); |
| 1780 | if (!iheldthelock) |
| 1781 | VOP_UNLOCK(vp, 0, curproc); |
| 1782 | #elif defined(AFS_NBSD40_ENV) |
| 1783 | iheldthelock = VOP_ISLOCKED(vp); |
| 1784 | if (!iheldthelock) { |
| 1785 | VOP_LOCK(vp, LK_EXCLUSIVE | LK_RETRY); |
| 1786 | } |
| 1787 | uvm_vnp_uncache(vp); |
| 1788 | if (!iheldthelock) |
| 1789 | VOP_UNLOCK(vp, 0); |
| 1790 | #endif |
| 1791 | } |
| 1792 | #endif |
| 1793 | #endif |
| 1794 | |
| 1795 | ObtainWriteLock(&afs_xcbhash, 464)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 464; } while (0); |
| 1796 | tvc->f.states &= ~CUnique0x00001000; |
| 1797 | tvc->callback = 0; |
| 1798 | afs_DequeueCallback(tvc); |
| 1799 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 1800 | |
| 1801 | /* It is always appropriate to throw away all the access rights? */ |
| 1802 | afs_FreeAllAxs(&(tvc->Access)); |
| 1803 | tvp = afs_GetVolume(afid, areq, READ_LOCK1); /* copy useful per-volume info */ |
| 1804 | if (tvp) { |
| 1805 | if ((tvp->states & VForeign8)) { |
| 1806 | if (newvcache) |
| 1807 | tvc->f.states |= CForeign0x00002000; |
| 1808 | if (newvcache && (tvp->rootVnode == afid->Fid.Vnode) |
| 1809 | && (tvp->rootUnique == afid->Fid.Unique)) { |
| 1810 | tvc->mvstat = 2; |
| 1811 | } |
| 1812 | } |
| 1813 | if (tvp->states & VRO1) |
| 1814 | tvc->f.states |= CRO0x00000004; |
| 1815 | if (tvp->states & VBackup4) |
| 1816 | tvc->f.states |= CBackup0x00000002; |
| 1817 | /* now copy ".." entry back out of volume structure, if necessary */ |
| 1818 | if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) { |
| 1819 | if (!tvc->mvid) |
| 1820 | tvc->mvid = (struct VenusFid *) |
| 1821 | osi_AllocSmallSpace(sizeof(struct VenusFid)); |
| 1822 | *tvc->mvid = tvp->dotdot; |
| 1823 | } |
| 1824 | afs_PutVolume(tvp, READ_LOCK)((tvp)->refCount--); |
| 1825 | } |
| 1826 | |
| 1827 | /* stat the file */ |
| 1828 | afs_RemoveVCB(afid); |
| 1829 | { |
| 1830 | struct AFSFetchStatus OutStatus; |
| 1831 | |
| 1832 | if (afs_DynrootNewVnode(tvc, &OutStatus)) { |
| 1833 | afs_ProcessFS(tvc, &OutStatus, areq); |
| 1834 | tvc->f.states |= CStatd0x00000001 | CUnique0x00001000; |
| 1835 | tvc->f.parent.vnodeusr_vnode = OutStatus.ParentVnode; |
| 1836 | tvc->f.parent.unique = OutStatus.ParentUnique; |
| 1837 | code = 0; |
| 1838 | } else { |
| 1839 | |
| 1840 | if (AFS_IS_DISCONNECTED(afs_is_disconnected)) { |
| 1841 | /* Nothing to do otherwise...*/ |
| 1842 | code = ENETDOWN50; |
| 1843 | /* printf("Network is down in afs_GetCache"); */ |
| 1844 | } else |
| 1845 | code = afs_FetchStatus(tvc, afid, areq, &OutStatus); |
| 1846 | |
| 1847 | /* For the NFS translator's benefit, make sure |
| 1848 | * non-directory vnodes always have their parent FID set |
| 1849 | * correctly, even when created as a result of decoding an |
| 1850 | * NFS filehandle. It would be nice to also do this for |
| 1851 | * directories, but we can't because the fileserver fills |
| 1852 | * in the FID of the directory itself instead of that of |
| 1853 | * its parent. |
| 1854 | */ |
| 1855 | if (!code && OutStatus.FileType != Directory2 && |
| 1856 | !tvc->f.parent.vnodeusr_vnode) { |
| 1857 | tvc->f.parent.vnodeusr_vnode = OutStatus.ParentVnode; |
| 1858 | tvc->f.parent.unique = OutStatus.ParentUnique; |
| 1859 | /* XXX - SXW - It's conceivable we should mark ourselves |
| 1860 | * as dirty again here, incase we've been raced |
| 1861 | * out of the FetchStatus call. |
| 1862 | */ |
| 1863 | } |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | if (code) { |
| 1868 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 1869 | |
| 1870 | afs_PutVCache(tvc); |
| 1871 | return NULL((void *)0); |
| 1872 | } |
| 1873 | |
| 1874 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 1875 | return tvc; |
| 1876 | |
| 1877 | } /*afs_GetVCache */ |
| 1878 | |
| 1879 | |
| 1880 | |
| 1881 | /*! |
| 1882 | * Lookup a vcache by fid. Look inside the cache first, if not |
| 1883 | * there, lookup the file on the server, and then get it's fresh |
| 1884 | * cache entry. |
| 1885 | * |
| 1886 | * \param afid |
| 1887 | * \param areq |
| 1888 | * \param cached Is element cached? If NULL, don't answer. |
| 1889 | * \param adp |
| 1890 | * \param aname |
| 1891 | * |
| 1892 | * \return The found element or NULL. |
| 1893 | */ |
| 1894 | struct vcache * |
| 1895 | afs_LookupVCache(struct VenusFid *afid, struct vrequest *areq, |
| 1896 | afs_int32 * cached, struct vcache *adp, char *aname) |
| 1897 | { |
| 1898 | afs_int32 code, now, newvcache = 0; |
| 1899 | struct VenusFid nfid; |
| 1900 | struct vcache *tvc; |
| 1901 | struct volume *tvp; |
| 1902 | struct AFSFetchStatus OutStatus; |
| 1903 | struct AFSCallBack CallBack; |
| 1904 | struct AFSVolSync tsync; |
| 1905 | struct server *serverp = 0; |
| 1906 | afs_int32 origCBs; |
| 1907 | afs_int32 retry; |
| 1908 | |
| 1909 | AFS_STATCNT(afs_GetVCache)((afs_cmstats.callInfo.C_afs_GetVCache)++); |
| 1910 | if (cached) |
| 1911 | *cached = 0; /* Init just in case */ |
| 1912 | |
| 1913 | #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV) |
| 1914 | loop1: |
| 1915 | #endif |
| 1916 | |
| 1917 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 1918 | tvc = afs_FindVCache(afid, &retry, DO_STATS1 /* no vlru */ ); |
| 1919 | |
| 1920 | if (tvc) { |
| 1921 | ReleaseReadLock(&afs_xvcache)do { ; if (!(--((&afs_xvcache)->readers_reading)) && (&afs_xvcache)->wait_states) Afs_Lock_ReleaseW(&afs_xvcache ) ; if ( (&afs_xvcache)->pid_last_reader == (get_user_struct ()->u_procp->p_pid ) ) (&afs_xvcache)->pid_last_reader =0; } while (0); |
| 1922 | if (retry) { |
| 1923 | #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV) |
| 1924 | spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD); |
| 1925 | goto loop1; |
| 1926 | #endif |
| 1927 | } |
| 1928 | ObtainReadLock(&tvc->lock)do { ; if (!((&tvc->lock)->excl_locked & 2)) (( &tvc->lock)->readers_reading)++; else Afs_Lock_Obtain (&tvc->lock, 1); (&tvc->lock)->pid_last_reader = (get_user_struct()->u_procp->p_pid ); } while (0); |
| 1929 | |
| 1930 | if (tvc->f.states & CStatd0x00000001) { |
| 1931 | if (cached) { |
| 1932 | *cached = 1; |
| 1933 | } |
| 1934 | ReleaseReadLock(&tvc->lock)do { ; if (!(--((&tvc->lock)->readers_reading)) && (&tvc->lock)->wait_states) Afs_Lock_ReleaseW(& tvc->lock) ; if ( (&tvc->lock)->pid_last_reader == (get_user_struct()->u_procp->p_pid ) ) (&tvc->lock )->pid_last_reader =0; } while (0); |
| 1935 | return tvc; |
| 1936 | } |
| 1937 | tvc->f.states &= ~CUnique0x00001000; |
| 1938 | |
| 1939 | ReleaseReadLock(&tvc->lock)do { ; if (!(--((&tvc->lock)->readers_reading)) && (&tvc->lock)->wait_states) Afs_Lock_ReleaseW(& tvc->lock) ; if ( (&tvc->lock)->pid_last_reader == (get_user_struct()->u_procp->p_pid ) ) (&tvc->lock )->pid_last_reader =0; } while (0); |
| 1940 | afs_PutVCache(tvc); |
| 1941 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 1942 | } |
| 1943 | /* if (tvc) */ |
| 1944 | ReleaseReadLock(&afs_xvcache)do { ; if (!(--((&afs_xvcache)->readers_reading)) && (&afs_xvcache)->wait_states) Afs_Lock_ReleaseW(&afs_xvcache ) ; if ( (&afs_xvcache)->pid_last_reader == (get_user_struct ()->u_procp->p_pid ) ) (&afs_xvcache)->pid_last_reader =0; } while (0); |
| 1945 | |
| 1946 | /* lookup the file */ |
| 1947 | nfid = *afid; |
| 1948 | now = osi_Time()(time(((void *)0))); |
| 1949 | origCBs = afs_allCBs; /* if anything changes, we don't have a cb */ |
| 1950 | |
| 1951 | if (AFS_IS_DISCONNECTED(afs_is_disconnected)) { |
| 1952 | /* printf("Network is down in afs_LookupVcache\n"); */ |
| 1953 | code = ENETDOWN50; |
| 1954 | } else |
| 1955 | code = |
| 1956 | afs_RemoteLookup(&adp->f.fidusr_fid, areq, aname, &nfid, &OutStatus, |
| 1957 | &CallBack, &serverp, &tsync); |
| 1958 | |
| 1959 | #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV) |
| 1960 | loop2: |
| 1961 | #endif |
| 1962 | |
| 1963 | ObtainSharedLock(&afs_xvcache, 6)do { ; if (!(&afs_xvcache)->excl_locked) (&afs_xvcache ) -> excl_locked = 4; else Afs_Lock_Obtain(&afs_xvcache , 4); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 6 ; } while (0); |
| 1964 | tvc = afs_FindVCache(&nfid, &retry, DO_VLRU2 | IS_SLOCK4/* no xstats now */ ); |
| 1965 | if (tvc && retry) { |
| 1966 | #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV) |
| 1967 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 1968 | spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD); |
| 1969 | goto loop2; |
| 1970 | #endif |
| 1971 | } |
| 1972 | |
| 1973 | if (!tvc) { |
| 1974 | /* no cache entry, better grab one */ |
| 1975 | UpgradeSToWLock(&afs_xvcache, 22)do { ; if (!(&afs_xvcache)->readers_reading) (&afs_xvcache )->excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 6); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 22 ; } while (0); |
| 1976 | tvc = afs_NewVCache(&nfid, serverp); |
| 1977 | newvcache = 1; |
| 1978 | ConvertWToSLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked = 4; if((&afs_xvcache )->wait_states) Afs_Lock_ReleaseR(&afs_xvcache); } while (0); |
| 1979 | if (!tvc) |
| 1980 | { |
| 1981 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 1982 | return NULL((void *)0); |
| 1983 | } |
| 1984 | } |
| 1985 | |
| 1986 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 1987 | ObtainWriteLock(&tvc->lock, 55)do { ; if (!(&tvc->lock)->excl_locked && !( &tvc->lock)->readers_reading) (&tvc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&tvc->lock, 2); (&tvc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&tvc->lock)->src_indicator = 55 ; } while (0); |
| 1988 | |
| 1989 | /* It is always appropriate to throw away all the access rights? */ |
| 1990 | afs_FreeAllAxs(&(tvc->Access)); |
| 1991 | tvp = afs_GetVolume(afid, areq, READ_LOCK1); /* copy useful per-vol info */ |
| 1992 | if (tvp) { |
| 1993 | if ((tvp->states & VForeign8)) { |
| 1994 | if (newvcache) |
| 1995 | tvc->f.states |= CForeign0x00002000; |
| 1996 | if (newvcache && (tvp->rootVnode == afid->Fid.Vnode) |
| 1997 | && (tvp->rootUnique == afid->Fid.Unique)) |
| 1998 | tvc->mvstat = 2; |
| 1999 | } |
| 2000 | if (tvp->states & VRO1) |
| 2001 | tvc->f.states |= CRO0x00000004; |
| 2002 | if (tvp->states & VBackup4) |
| 2003 | tvc->f.states |= CBackup0x00000002; |
| 2004 | /* now copy ".." entry back out of volume structure, if necessary */ |
| 2005 | if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) { |
| 2006 | if (!tvc->mvid) |
| 2007 | tvc->mvid = (struct VenusFid *) |
| 2008 | osi_AllocSmallSpace(sizeof(struct VenusFid)); |
| 2009 | *tvc->mvid = tvp->dotdot; |
| 2010 | } |
| 2011 | } |
| 2012 | |
| 2013 | if (code) { |
| 2014 | ObtainWriteLock(&afs_xcbhash, 465)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 465; } while (0); |
| 2015 | afs_DequeueCallback(tvc); |
| 2016 | tvc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 2017 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 2018 | if ((tvc->f.states & CForeign0x00002000) || (tvc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2019 | osi_dnlc_purgedp(tvc); /* if it (could be) a directory */ |
| 2020 | if (tvp) |
| 2021 | afs_PutVolume(tvp, READ_LOCK)((tvp)->refCount--); |
| 2022 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 2023 | afs_PutVCache(tvc); |
| 2024 | return NULL((void *)0); |
| 2025 | } |
| 2026 | |
| 2027 | ObtainWriteLock(&afs_xcbhash, 466)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 466; } while (0); |
| 2028 | if (origCBs == afs_allCBs) { |
| 2029 | if (CallBack.ExpirationTime) { |
| 2030 | tvc->callback = serverp; |
| 2031 | tvc->cbExpires = CallBack.ExpirationTime + now; |
| 2032 | tvc->f.states |= CStatd0x00000001 | CUnique0x00001000; |
| 2033 | tvc->f.states &= ~CBulkFetching0x04000000; |
| 2034 | afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime)((CallBack.ExpirationTime)>>7), tvp); |
| 2035 | } else if (tvc->f.states & CRO0x00000004) { |
| 2036 | /* adapt gives us an hour. */ |
| 2037 | tvc->cbExpires = 3600 + osi_Time()(time(((void *)0))); |
| 2038 | /*XXX*/ tvc->f.states |= CStatd0x00000001 | CUnique0x00001000; |
| 2039 | tvc->f.states &= ~CBulkFetching0x04000000; |
| 2040 | afs_QueueCallback(tvc, CBHash(3600)((3600)>>7), tvp); |
| 2041 | } else { |
| 2042 | tvc->callback = NULL((void *)0); |
| 2043 | afs_DequeueCallback(tvc); |
| 2044 | tvc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 2045 | if ((tvc->f.states & CForeign0x00002000) || (tvc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2046 | osi_dnlc_purgedp(tvc); /* if it (could be) a directory */ |
| 2047 | } |
| 2048 | } else { |
| 2049 | afs_DequeueCallback(tvc); |
| 2050 | tvc->f.states &= ~CStatd0x00000001; |
| 2051 | tvc->f.states &= ~CUnique0x00001000; |
| 2052 | tvc->callback = NULL((void *)0); |
| 2053 | if ((tvc->f.states & CForeign0x00002000) || (tvc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2054 | osi_dnlc_purgedp(tvc); /* if it (could be) a directory */ |
| 2055 | } |
| 2056 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 2057 | if (tvp) |
| 2058 | afs_PutVolume(tvp, READ_LOCK)((tvp)->refCount--); |
| 2059 | afs_ProcessFS(tvc, &OutStatus, areq); |
| 2060 | |
| 2061 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 2062 | return tvc; |
| 2063 | |
| 2064 | } |
| 2065 | |
| 2066 | struct vcache * |
| 2067 | afs_GetRootVCache(struct VenusFid *afid, struct vrequest *areq, |
| 2068 | afs_int32 * cached, struct volume *tvolp) |
| 2069 | { |
| 2070 | afs_int32 code = 0, i, newvcache = 0, haveStatus = 0; |
| 2071 | afs_int32 getNewFid = 0; |
| 2072 | afs_uint32 start; |
| 2073 | struct VenusFid nfid; |
| 2074 | struct vcache *tvc; |
| 2075 | struct server *serverp = 0; |
| 2076 | struct AFSFetchStatus OutStatus; |
| 2077 | struct AFSCallBack CallBack; |
| 2078 | struct AFSVolSync tsync; |
| 2079 | int origCBs = 0; |
| 2080 | #ifdef AFS_DARWIN80_ENV |
| 2081 | vnode_t tvp; |
| 2082 | #endif |
| 2083 | |
| 2084 | start = osi_Time()(time(((void *)0))); |
| 2085 | |
| 2086 | newmtpt: |
| 2087 | if (!tvolp->rootVnode || getNewFid) { |
| 2088 | struct VenusFid tfid; |
| 2089 | |
| 2090 | tfid = *afid; |
| 2091 | tfid.Fid.Vnode = 0; /* Means get rootfid of volume */ |
| 2092 | origCBs = afs_allCBs; /* ignore InitCallBackState */ |
| 2093 | code = |
| 2094 | afs_RemoteLookup(&tfid, areq, NULL((void *)0), &nfid, &OutStatus, &CallBack, |
| 2095 | &serverp, &tsync); |
| 2096 | if (code) { |
| 2097 | return NULL((void *)0); |
| 2098 | } |
| 2099 | /* ReleaseReadLock(&tvolp->lock); */ |
| 2100 | ObtainWriteLock(&tvolp->lock, 56)do { ; if (!(&tvolp->lock)->excl_locked && ! (&tvolp->lock)->readers_reading) (&tvolp->lock ) -> excl_locked = 2; else Afs_Lock_Obtain(&tvolp-> lock, 2); (&tvolp->lock)->pid_writer = (get_user_struct ()->u_procp->p_pid ); (&tvolp->lock)->src_indicator = 56; } while (0); |
| 2101 | tvolp->rootVnode = afid->Fid.Vnode = nfid.Fid.Vnode; |
| 2102 | tvolp->rootUnique = afid->Fid.Unique = nfid.Fid.Unique; |
| 2103 | ReleaseWriteLock(&tvolp->lock)do { ; (&tvolp->lock)->excl_locked &= ~2; if (( &tvolp->lock)->wait_states) Afs_Lock_ReleaseR(& tvolp->lock); (&tvolp->lock)->pid_writer=0; } while (0); |
| 2104 | /* ObtainReadLock(&tvolp->lock);*/ |
| 2105 | haveStatus = 1; |
| 2106 | } else { |
| 2107 | afid->Fid.Vnode = tvolp->rootVnode; |
| 2108 | afid->Fid.Unique = tvolp->rootUnique; |
| 2109 | } |
| 2110 | |
| 2111 | rootvc_loop: |
| 2112 | ObtainSharedLock(&afs_xvcache, 7)do { ; if (!(&afs_xvcache)->excl_locked) (&afs_xvcache ) -> excl_locked = 4; else Afs_Lock_Obtain(&afs_xvcache , 4); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 7 ; } while (0); |
| 2113 | i = VCHash(afid)(((afid)->Fid.Volume + (afid)->Fid.Vnode) & (1024 - 1)); |
| 2114 | for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) { |
| 2115 | if (!FidCmp(&(tvc->f.fid), afid)((&(tvc->f.usr_fid))->Fid.Unique != (afid)->Fid. Unique || (&(tvc->f.usr_fid))->Fid.Vnode != (afid)-> Fid.Vnode || (&(tvc->f.usr_fid))->Fid.Volume != (afid )->Fid.Volume || (&(tvc->f.usr_fid))->Cell != (afid )->Cell)) { |
| 2116 | if (tvc->f.states & CVInit0x10000000) { |
| 2117 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2118 | afs_osi_Sleep(&tvc->f.states); |
| 2119 | goto rootvc_loop; |
| 2120 | } |
| 2121 | #ifdef AFS_DARWIN80_ENV |
| 2122 | if (tvc->f.states & CDeadVnode) { |
| 2123 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2124 | afs_osi_Sleep(&tvc->f.states); |
| 2125 | goto rootvc_loop; |
| 2126 | } |
| 2127 | tvp = AFSTOV(tvc)(&(tvc)->v); |
| 2128 | if (vnode_get(tvp)) /* this bumps ref count */ |
| 2129 | continue; |
| 2130 | if (vnode_ref(tvp)) { |
| 2131 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2131);}while(0); } while(0); |
| 2132 | /* AFSTOV(tvc) may be NULL */ |
| 2133 | vnode_put(tvp); |
| 2134 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2134);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 2135 | continue; |
| 2136 | } |
| 2137 | #endif |
| 2138 | break; |
| 2139 | } |
| 2140 | } |
| 2141 | |
| 2142 | if (!haveStatus && (!tvc || !(tvc->f.states & CStatd0x00000001))) { |
| 2143 | /* Mount point no longer stat'd or unknown. FID may have changed. */ |
| 2144 | getNewFid = 1; |
| 2145 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2146 | #ifdef AFS_DARWIN80_ENV |
| 2147 | if (tvc) { |
| 2148 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2148);}while(0); } while(0); |
| 2149 | vnode_put(AFSTOV(tvc)(&(tvc)->v)); |
| 2150 | vnode_rele(AFSTOV(tvc)(&(tvc)->v)); |
| 2151 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2151);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 2152 | } |
| 2153 | #endif |
| 2154 | tvc = NULL((void *)0); |
| 2155 | goto newmtpt; |
| 2156 | } |
| 2157 | |
| 2158 | if (!tvc) { |
| 2159 | UpgradeSToWLock(&afs_xvcache, 23)do { ; if (!(&afs_xvcache)->readers_reading) (&afs_xvcache )->excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 6); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 23 ; } while (0); |
| 2160 | /* no cache entry, better grab one */ |
| 2161 | tvc = afs_NewVCache(afid, NULL((void *)0)); |
| 2162 | if (!tvc) |
| 2163 | { |
| 2164 | ReleaseWriteLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~2; if ((& afs_xvcache)->wait_states) Afs_Lock_ReleaseR(&afs_xvcache ); (&afs_xvcache)->pid_writer=0; } while (0); |
| 2165 | return NULL((void *)0); |
| 2166 | } |
| 2167 | newvcache = 1; |
| 2168 | afs_stats_cmperf.vcacheMisses++; |
| 2169 | } else { |
| 2170 | if (cached) |
| 2171 | *cached = 1; |
| 2172 | afs_stats_cmperf.vcacheHits++; |
| 2173 | #if defined(AFS_DARWIN80_ENV) |
| 2174 | /* we already bumped the ref count in the for loop above */ |
| 2175 | #else /* AFS_DARWIN80_ENV */ |
| 2176 | osi_vnhold(tvc, 0)do { { ((&(tvc)->v))->v_count++; }; } while(0); |
| 2177 | #endif |
| 2178 | UpgradeSToWLock(&afs_xvcache, 24)do { ; if (!(&afs_xvcache)->readers_reading) (&afs_xvcache )->excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 6); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 24 ; } while (0); |
| 2179 | if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { |
| 2180 | refpanic("GRVC VLRU inconsistent0")if (afs_norefpanic) { printf( "GRVC VLRU inconsistent0" ); afs_norefpanic ++;} else osi_Panic( "GRVC VLRU inconsistent0" ); |
| 2181 | } |
| 2182 | if (tvc->vlruq.next->prev != &(tvc->vlruq)) { |
| 2183 | refpanic("GRVC VLRU inconsistent1")if (afs_norefpanic) { printf( "GRVC VLRU inconsistent1" ); afs_norefpanic ++;} else osi_Panic( "GRVC VLRU inconsistent1" ); |
| 2184 | } |
| 2185 | if (tvc->vlruq.prev->next != &(tvc->vlruq)) { |
| 2186 | refpanic("GRVC VLRU inconsistent2")if (afs_norefpanic) { printf( "GRVC VLRU inconsistent2" ); afs_norefpanic ++;} else osi_Panic( "GRVC VLRU inconsistent2" ); |
| 2187 | } |
| 2188 | QRemove(&tvc->vlruq)((&tvc->vlruq)->next->prev = (&tvc->vlruq )->prev, (&tvc->vlruq)->prev->next = (&tvc ->vlruq)->next, (&tvc->vlruq)->prev = ((void * )0), (&tvc->vlruq)->next = ((void *)0)); /* move to lruq head */ |
| 2189 | QAdd(&VLRU, &tvc->vlruq)((&tvc->vlruq)->next = (&VLRU)->next, (& tvc->vlruq)->prev = (&VLRU), (&VLRU)->next-> prev = (&tvc->vlruq), (&VLRU)->next = (&tvc ->vlruq)); |
| 2190 | if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { |
| 2191 | refpanic("GRVC VLRU inconsistent3")if (afs_norefpanic) { printf( "GRVC VLRU inconsistent3" ); afs_norefpanic ++;} else osi_Panic( "GRVC VLRU inconsistent3" ); |
| 2192 | } |
| 2193 | if (tvc->vlruq.next->prev != &(tvc->vlruq)) { |
| 2194 | refpanic("GRVC VLRU inconsistent4")if (afs_norefpanic) { printf( "GRVC VLRU inconsistent4" ); afs_norefpanic ++;} else osi_Panic( "GRVC VLRU inconsistent4" ); |
| 2195 | } |
| 2196 | if (tvc->vlruq.prev->next != &(tvc->vlruq)) { |
| 2197 | refpanic("GRVC VLRU inconsistent5")if (afs_norefpanic) { printf( "GRVC VLRU inconsistent5" ); afs_norefpanic ++;} else osi_Panic( "GRVC VLRU inconsistent5" ); |
| 2198 | } |
| 2199 | vcachegen++; |
| 2200 | } |
| 2201 | |
| 2202 | ReleaseWriteLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~2; if ((& afs_xvcache)->wait_states) Afs_Lock_ReleaseR(&afs_xvcache ); (&afs_xvcache)->pid_writer=0; } while (0); |
| 2203 | |
| 2204 | if (tvc->f.states & CStatd0x00000001) { |
| 2205 | return tvc; |
| 2206 | } else { |
| 2207 | |
| 2208 | ObtainReadLock(&tvc->lock)do { ; if (!((&tvc->lock)->excl_locked & 2)) (( &tvc->lock)->readers_reading)++; else Afs_Lock_Obtain (&tvc->lock, 1); (&tvc->lock)->pid_last_reader = (get_user_struct()->u_procp->p_pid ); } while (0); |
| 2209 | tvc->f.states &= ~CUnique0x00001000; |
| 2210 | tvc->callback = NULL((void *)0); /* redundant, perhaps */ |
| 2211 | ReleaseReadLock(&tvc->lock)do { ; if (!(--((&tvc->lock)->readers_reading)) && (&tvc->lock)->wait_states) Afs_Lock_ReleaseW(& tvc->lock) ; if ( (&tvc->lock)->pid_last_reader == (get_user_struct()->u_procp->p_pid ) ) (&tvc->lock )->pid_last_reader =0; } while (0); |
| 2212 | } |
| 2213 | |
| 2214 | ObtainWriteLock(&tvc->lock, 57)do { ; if (!(&tvc->lock)->excl_locked && !( &tvc->lock)->readers_reading) (&tvc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&tvc->lock, 2); (&tvc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&tvc->lock)->src_indicator = 57 ; } while (0); |
| 2215 | |
| 2216 | /* It is always appropriate to throw away all the access rights? */ |
| 2217 | afs_FreeAllAxs(&(tvc->Access)); |
| 2218 | |
| 2219 | if (newvcache) |
| 2220 | tvc->f.states |= CForeign0x00002000; |
| 2221 | if (tvolp->states & VRO1) |
| 2222 | tvc->f.states |= CRO0x00000004; |
| 2223 | if (tvolp->states & VBackup4) |
| 2224 | tvc->f.states |= CBackup0x00000002; |
| 2225 | /* now copy ".." entry back out of volume structure, if necessary */ |
| 2226 | if (newvcache && (tvolp->rootVnode == afid->Fid.Vnode) |
| 2227 | && (tvolp->rootUnique == afid->Fid.Unique)) { |
| 2228 | tvc->mvstat = 2; |
| 2229 | } |
| 2230 | if (tvc->mvstat == 2 && tvolp->dotdot.Fid.Volume != 0) { |
| 2231 | if (!tvc->mvid) |
| 2232 | tvc->mvid = (struct VenusFid *) |
| 2233 | osi_AllocSmallSpace(sizeof(struct VenusFid)); |
| 2234 | *tvc->mvid = tvolp->dotdot; |
| 2235 | } |
| 2236 | |
| 2237 | /* stat the file */ |
| 2238 | afs_RemoveVCB(afid); |
| 2239 | |
| 2240 | if (!haveStatus) { |
| 2241 | struct VenusFid tfid; |
| 2242 | |
| 2243 | tfid = *afid; |
| 2244 | tfid.Fid.Vnode = 0; /* Means get rootfid of volume */ |
| 2245 | origCBs = afs_allCBs; /* ignore InitCallBackState */ |
| 2246 | code = |
| 2247 | afs_RemoteLookup(&tfid, areq, NULL((void *)0), &nfid, &OutStatus, &CallBack, |
| 2248 | &serverp, &tsync); |
| 2249 | } |
| 2250 | |
| 2251 | if (code) { |
| 2252 | ObtainWriteLock(&afs_xcbhash, 467)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 467; } while (0); |
| 2253 | afs_DequeueCallback(tvc); |
| 2254 | tvc->callback = NULL((void *)0); |
| 2255 | tvc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 2256 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 2257 | if ((tvc->f.states & CForeign0x00002000) || (tvc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2258 | osi_dnlc_purgedp(tvc); /* if it (could be) a directory */ |
| 2259 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 2260 | afs_PutVCache(tvc); |
| 2261 | return NULL((void *)0); |
| 2262 | } |
| 2263 | |
| 2264 | ObtainWriteLock(&afs_xcbhash, 468)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 468; } while (0); |
| 2265 | if (origCBs == afs_allCBs) { |
| 2266 | tvc->f.states |= CTruth0x00000400; |
| 2267 | tvc->callback = serverp; |
| 2268 | if (CallBack.ExpirationTime != 0) { |
| 2269 | tvc->cbExpires = CallBack.ExpirationTime + start; |
| 2270 | tvc->f.states |= CStatd0x00000001; |
| 2271 | tvc->f.states &= ~CBulkFetching0x04000000; |
| 2272 | afs_QueueCallback(tvc, CBHash(CallBack.ExpirationTime)((CallBack.ExpirationTime)>>7), tvolp); |
| 2273 | } else if (tvc->f.states & CRO0x00000004) { |
| 2274 | /* adapt gives us an hour. */ |
| 2275 | tvc->cbExpires = 3600 + osi_Time()(time(((void *)0))); |
| 2276 | /*XXX*/ tvc->f.states |= CStatd0x00000001; |
| 2277 | tvc->f.states &= ~CBulkFetching0x04000000; |
| 2278 | afs_QueueCallback(tvc, CBHash(3600)((3600)>>7), tvolp); |
| 2279 | } |
| 2280 | } else { |
| 2281 | afs_DequeueCallback(tvc); |
| 2282 | tvc->callback = NULL((void *)0); |
| 2283 | tvc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 2284 | if ((tvc->f.states & CForeign0x00002000) || (tvc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2285 | osi_dnlc_purgedp(tvc); /* if it (could be) a directory */ |
| 2286 | } |
| 2287 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 2288 | afs_ProcessFS(tvc, &OutStatus, areq); |
| 2289 | |
| 2290 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 2291 | return tvc; |
| 2292 | } |
| 2293 | |
| 2294 | |
| 2295 | /*! |
| 2296 | * Update callback status and (sometimes) attributes of a vnode. |
| 2297 | * Called after doing a fetch status RPC. Whilst disconnected, attributes |
| 2298 | * shouldn't be written to the vcache here. |
| 2299 | * |
| 2300 | * \param avc |
| 2301 | * \param afid |
| 2302 | * \param areq |
| 2303 | * \param Outsp Server status after rpc call. |
| 2304 | * \param acb Callback for this vnode. |
| 2305 | * |
| 2306 | * \note The vcache must be write locked. |
| 2307 | */ |
| 2308 | void |
| 2309 | afs_UpdateStatus(struct vcache *avc, struct VenusFid *afid, |
| 2310 | struct vrequest *areq, struct AFSFetchStatus *Outsp, |
| 2311 | struct AFSCallBack *acb, afs_uint32 start) |
| 2312 | { |
| 2313 | struct volume *volp; |
| 2314 | |
| 2315 | if (!AFS_IN_SYNC(afs_in_sync)) |
| 2316 | /* Dont write status in vcache if resyncing after a disconnection. */ |
| 2317 | afs_ProcessFS(avc, Outsp, areq); |
| 2318 | |
| 2319 | volp = afs_GetVolume(afid, areq, READ_LOCK1); |
| 2320 | ObtainWriteLock(&afs_xcbhash, 469)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 469; } while (0); |
| 2321 | avc->f.states |= CTruth0x00000400; |
| 2322 | if (avc->callback /* check for race */ ) { |
| 2323 | if (acb->ExpirationTime != 0) { |
| 2324 | avc->cbExpires = acb->ExpirationTime + start; |
| 2325 | avc->f.states |= CStatd0x00000001; |
| 2326 | avc->f.states &= ~CBulkFetching0x04000000; |
| 2327 | afs_QueueCallback(avc, CBHash(acb->ExpirationTime)((acb->ExpirationTime)>>7), volp); |
| 2328 | } else if (avc->f.states & CRO0x00000004) { |
| 2329 | /* ordinary callback on a read-only volume -- AFS 3.2 style */ |
| 2330 | avc->cbExpires = 3600 + start; |
| 2331 | avc->f.states |= CStatd0x00000001; |
| 2332 | avc->f.states &= ~CBulkFetching0x04000000; |
| 2333 | afs_QueueCallback(avc, CBHash(3600)((3600)>>7), volp); |
| 2334 | } else { |
| 2335 | afs_DequeueCallback(avc); |
| 2336 | avc->callback = NULL((void *)0); |
| 2337 | avc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 2338 | if ((avc->f.states & CForeign0x00002000) || (avc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2339 | osi_dnlc_purgedp(avc); /* if it (could be) a directory */ |
| 2340 | } |
| 2341 | } else { |
| 2342 | afs_DequeueCallback(avc); |
| 2343 | avc->callback = NULL((void *)0); |
| 2344 | avc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 2345 | if ((avc->f.states & CForeign0x00002000) || (avc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2346 | osi_dnlc_purgedp(avc); /* if it (could be) a directory */ |
| 2347 | } |
| 2348 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 2349 | if (volp) |
| 2350 | afs_PutVolume(volp, READ_LOCK)((volp)->refCount--); |
| 2351 | } |
| 2352 | |
| 2353 | /*! |
| 2354 | * Must be called with avc write-locked |
| 2355 | * don't absolutely have to invalidate the hint unless the dv has |
| 2356 | * changed, but be sure to get it right else there will be consistency bugs. |
| 2357 | */ |
| 2358 | afs_int32 |
| 2359 | afs_FetchStatus(struct vcache * avc, struct VenusFid * afid, |
| 2360 | struct vrequest * areq, struct AFSFetchStatus * Outsp) |
| 2361 | { |
| 2362 | int code; |
| 2363 | afs_uint32 start = 0; |
| 2364 | struct afs_conn *tc; |
| 2365 | struct AFSCallBack CallBack; |
| 2366 | struct AFSVolSync tsync; |
| 2367 | struct rx_connection *rxconn; |
| 2368 | XSTATS_DECLSstruct afs_stats_opTimingData *opP = ((void *)0); osi_timeval_t opStartTime = { 0, 0}, opStopTime, elapsedTime; |
| 2369 | do { |
| 2370 | tc = afs_Conn(afid, areq, SHARED_LOCK4, &rxconn); |
| 2371 | avc->dchint = NULL((void *)0); /* invalidate hints */ |
| 2372 | if (tc) { |
| 2373 | avc->callback = tc->parent->srvr->server; |
| 2374 | start = osi_Time()(time(((void *)0))); |
| 2375 | XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS)opP = &(afs_stats_cmfullperf.rpc.fsRPCTimes[2]); osi_GetTime (&opStartTime);; |
| 2376 | RX_AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2376);}while(0); } while(0); |
| 2377 | code = |
| 2378 | RXAFS_FetchStatus(rxconn, (struct AFSFid *)&afid->Fid, Outsp, |
| 2379 | &CallBack, &tsync); |
| 2380 | RX_AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2380);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 2381 | |
| 2382 | XSTATS_END_TIMEosi_GetTime(&opStopTime); (opP->numOps)++; if (!code) { (opP->numSuccesses)++; { if (opStopTime.tv_usec < opStartTime .tv_usec) { opStopTime.tv_usec += 1000000; opStopTime.tv_sec -= 1; } elapsedTime.tv_sec = opStopTime.tv_sec - opStartTime.tv_sec ; elapsedTime.tv_usec = opStopTime.tv_usec - opStartTime.tv_usec ; }; { (opP->sumTime).tv_sec += elapsedTime.tv_sec; (opP-> sumTime).tv_usec += elapsedTime.tv_usec; if ((opP->sumTime ).tv_usec > 1000000) { (opP->sumTime).tv_usec -= 1000000 ; (opP->sumTime).tv_sec++; } }; { if(elapsedTime.tv_sec > 0 ) { (opP->sqrTime).tv_sec += elapsedTime.tv_sec * elapsedTime .tv_sec + 2 * elapsedTime.tv_sec * elapsedTime.tv_usec /1000000 ; (opP->sqrTime).tv_usec += (2 * elapsedTime.tv_sec * elapsedTime .tv_usec) % 1000000 + (elapsedTime.tv_usec / 1000)*(elapsedTime .tv_usec / 1000) + 2 * (elapsedTime.tv_usec / 1000) * (elapsedTime .tv_usec % 1000) / 1000 + (((elapsedTime.tv_usec % 1000) > 707) ? 1 : 0); } else { (opP->sqrTime).tv_usec += (elapsedTime .tv_usec / 1000)*(elapsedTime.tv_usec / 1000) + 2 * (elapsedTime .tv_usec / 1000) * (elapsedTime.tv_usec % 1000) / 1000 + (((elapsedTime .tv_usec % 1000) > 707) ? 1 : 0); } if ((opP->sqrTime). tv_usec > 1000000) { (opP->sqrTime).tv_usec -= 1000000; (opP->sqrTime).tv_sec++; } }; if (((elapsedTime.tv_sec < (opP->minTime).tv_sec) ? 1 : (elapsedTime.tv_sec > (opP ->minTime).tv_sec) ? 0 : (elapsedTime.tv_usec < (opP-> minTime).tv_usec) ? 1 : 0)) { { (opP->minTime).tv_sec = elapsedTime .tv_sec; (opP->minTime).tv_usec = elapsedTime.tv_usec; }; } if (((elapsedTime.tv_sec > (opP->maxTime).tv_sec) ? 1 : (elapsedTime.tv_sec < (opP->maxTime).tv_sec) ? 0 : (elapsedTime .tv_usec > (opP->maxTime).tv_usec) ? 1 : 0)) { { (opP-> maxTime).tv_sec = elapsedTime.tv_sec; (opP->maxTime).tv_usec = elapsedTime.tv_usec; }; } }; |
| 2383 | |
| 2384 | } else |
| 2385 | code = -1; |
| 2386 | } while (afs_Analyze |
| 2387 | (tc, rxconn, code, afid, areq, AFS_STATS_FS_RPCIDX_FETCHSTATUS2, |
| 2388 | SHARED_LOCK4, NULL((void *)0))); |
| 2389 | |
| 2390 | if (!code) { |
| 2391 | afs_UpdateStatus(avc, afid, areq, Outsp, &CallBack, start); |
| 2392 | } else { |
| 2393 | /* used to undo the local callback, but that's too extreme. |
| 2394 | * There are plenty of good reasons that fetchstatus might return |
| 2395 | * an error, such as EPERM. If we have the vnode cached, statd, |
| 2396 | * with callback, might as well keep track of the fact that we |
| 2397 | * don't have access... |
| 2398 | */ |
| 2399 | if (code == EPERM1 || code == EACCES13) { |
| 2400 | struct axscache *ac; |
| 2401 | if (avc->Access && (ac = afs_FindAxs(avc->Access, areq->uid)(((avc->Access)->uid == areq->uid) ? (avc->Access ) : afs_SlowFindAxs(&(avc->Access),(areq->uid))))) |
| 2402 | ac->axess = 0; |
| 2403 | else /* not found, add a new one if possible */ |
| 2404 | afs_AddAxs(avc->Access, areq->uid, 0){ struct axscache *ac; if ((ac = axs_Alloc())) { ac->uid = (areq->uid); ac->axess = (afs_int32)(0); ac->next = (avc->Access); avc->Access = ac; }}; |
| 2405 | } |
| 2406 | } |
| 2407 | return code; |
| 2408 | } |
| 2409 | |
| 2410 | #if 0 |
| 2411 | /* |
| 2412 | * afs_StuffVcache |
| 2413 | * |
| 2414 | * Description: |
| 2415 | * Stuff some information into the vcache for the given file. |
| 2416 | * |
| 2417 | * Parameters: |
| 2418 | * afid : File in question. |
| 2419 | * OutStatus : Fetch status on the file. |
| 2420 | * CallBack : Callback info. |
| 2421 | * tc : RPC connection involved. |
| 2422 | * areq : vrequest involved. |
| 2423 | * |
| 2424 | * Environment: |
| 2425 | * Nothing interesting. |
| 2426 | */ |
| 2427 | void |
| 2428 | afs_StuffVcache(struct VenusFid *afid, |
| 2429 | struct AFSFetchStatus *OutStatus, |
| 2430 | struct AFSCallBack *CallBack, struct afs_conn *tc, |
| 2431 | struct vrequest *areq) |
| 2432 | { |
| 2433 | afs_int32 code, i, newvcache = 0; |
| 2434 | struct vcache *tvc; |
| 2435 | struct AFSVolSync tsync; |
| 2436 | struct volume *tvp; |
| 2437 | struct axscache *ac; |
| 2438 | afs_int32 retry; |
| 2439 | |
| 2440 | AFS_STATCNT(afs_StuffVcache)((afs_cmstats.callInfo.C_afs_StuffVcache)++); |
| 2441 | #ifdef IFS_VCACHECOUNT |
| 2442 | ifs_gvcachecall++; |
| 2443 | #endif |
| 2444 | |
| 2445 | loop: |
| 2446 | ObtainSharedLock(&afs_xvcache, 8)do { ; if (!(&afs_xvcache)->excl_locked) (&afs_xvcache ) -> excl_locked = 4; else Afs_Lock_Obtain(&afs_xvcache , 4); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 8 ; } while (0); |
| 2447 | |
| 2448 | tvc = afs_FindVCache(afid, &retry, DO_VLRU2| IS_SLOCK4 /* no stats */ ); |
| 2449 | if (tvc && retry) { |
| 2450 | #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV) |
| 2451 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2452 | spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD); |
| 2453 | goto loop; |
| 2454 | #endif |
| 2455 | } |
| 2456 | |
| 2457 | if (!tvc) { |
| 2458 | /* no cache entry, better grab one */ |
| 2459 | UpgradeSToWLock(&afs_xvcache, 25)do { ; if (!(&afs_xvcache)->readers_reading) (&afs_xvcache )->excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 6); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 25 ; } while (0); |
| 2460 | tvc = afs_NewVCache(afid, NULL((void *)0)); |
| 2461 | newvcache = 1; |
| 2462 | ConvertWToSLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked = 4; if((&afs_xvcache )->wait_states) Afs_Lock_ReleaseR(&afs_xvcache); } while (0); |
| 2463 | if (!tvc) |
| 2464 | { |
| 2465 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2466 | return NULL((void *)0); |
| 2467 | } |
| 2468 | } |
| 2469 | |
| 2470 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2471 | ObtainWriteLock(&tvc->lock, 58)do { ; if (!(&tvc->lock)->excl_locked && !( &tvc->lock)->readers_reading) (&tvc->lock) -> excl_locked = 2; else Afs_Lock_Obtain(&tvc->lock, 2); (&tvc->lock)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&tvc->lock)->src_indicator = 58 ; } while (0); |
| 2472 | |
| 2473 | tvc->f.states &= ~CStatd0x00000001; |
| 2474 | if ((tvc->f.states & CForeign0x00002000) || (tvc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2475 | osi_dnlc_purgedp(tvc); /* if it (could be) a directory */ |
| 2476 | |
| 2477 | /* Is it always appropriate to throw away all the access rights? */ |
| 2478 | afs_FreeAllAxs(&(tvc->Access)); |
| 2479 | |
| 2480 | /*Copy useful per-volume info */ |
| 2481 | tvp = afs_GetVolume(afid, areq, READ_LOCK1); |
| 2482 | if (tvp) { |
| 2483 | if (newvcache && (tvp->states & VForeign8)) |
| 2484 | tvc->f.states |= CForeign0x00002000; |
| 2485 | if (tvp->states & VRO1) |
| 2486 | tvc->f.states |= CRO0x00000004; |
| 2487 | if (tvp->states & VBackup4) |
| 2488 | tvc->f.states |= CBackup0x00000002; |
| 2489 | /* |
| 2490 | * Now, copy ".." entry back out of volume structure, if |
| 2491 | * necessary |
| 2492 | */ |
| 2493 | if (tvc->mvstat == 2 && tvp->dotdot.Fid.Volume != 0) { |
| 2494 | if (!tvc->mvid) |
| 2495 | tvc->mvid = (struct VenusFid *) |
| 2496 | osi_AllocSmallSpace(sizeof(struct VenusFid)); |
| 2497 | *tvc->mvid = tvp->dotdot; |
| 2498 | } |
| 2499 | } |
| 2500 | /* store the stat on the file */ |
| 2501 | afs_RemoveVCB(afid); |
| 2502 | afs_ProcessFS(tvc, OutStatus, areq); |
| 2503 | tvc->callback = tc->srvr->server; |
| 2504 | |
| 2505 | /* we use osi_Time twice below. Ideally, we would use the time at which |
| 2506 | * the FetchStatus call began, instead, but we don't have it here. So we |
| 2507 | * make do with "now". In the CRO case, it doesn't really matter. In |
| 2508 | * the other case, we hope that the difference between "now" and when the |
| 2509 | * call actually began execution on the server won't be larger than the |
| 2510 | * padding which the server keeps. Subtract 1 second anyway, to be on |
| 2511 | * the safe side. Can't subtract more because we don't know how big |
| 2512 | * ExpirationTime is. Possible consistency problems may arise if the call |
| 2513 | * timeout period becomes longer than the server's expiration padding. */ |
| 2514 | ObtainWriteLock(&afs_xcbhash, 470)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 470; } while (0); |
| 2515 | if (CallBack->ExpirationTime != 0) { |
| 2516 | tvc->cbExpires = CallBack->ExpirationTime + osi_Time()(time(((void *)0))) - 1; |
| 2517 | tvc->f.states |= CStatd0x00000001; |
| 2518 | tvc->f.states &= ~CBulkFetching0x04000000; |
| 2519 | afs_QueueCallback(tvc, CBHash(CallBack->ExpirationTime)((CallBack->ExpirationTime)>>7), tvp); |
| 2520 | } else if (tvc->f.states & CRO0x00000004) { |
| 2521 | /* old-fashioned AFS 3.2 style */ |
| 2522 | tvc->cbExpires = 3600 + osi_Time()(time(((void *)0))); |
| 2523 | /*XXX*/ tvc->f.states |= CStatd0x00000001; |
| 2524 | tvc->f.states &= ~CBulkFetching0x04000000; |
| 2525 | afs_QueueCallback(tvc, CBHash(3600)((3600)>>7), tvp); |
| 2526 | } else { |
| 2527 | afs_DequeueCallback(tvc); |
| 2528 | tvc->callback = NULL((void *)0); |
| 2529 | tvc->f.states &= ~(CStatd0x00000001 | CUnique0x00001000); |
| 2530 | if ((tvc->f.states & CForeign0x00002000) || (tvc->f.fidusr_fid.Fid.Vnode & 1)) |
| 2531 | osi_dnlc_purgedp(tvc); /* if it (could be) a directory */ |
| 2532 | } |
| 2533 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 2534 | if (tvp) |
| 2535 | afs_PutVolume(tvp, READ_LOCK)((tvp)->refCount--); |
| 2536 | |
| 2537 | /* look in per-pag cache */ |
| 2538 | if (tvc->Access && (ac = afs_FindAxs(tvc->Access, areq->uid)(((tvc->Access)->uid == areq->uid) ? (tvc->Access ) : afs_SlowFindAxs(&(tvc->Access),(areq->uid))))) |
| 2539 | ac->axess = OutStatus->CallerAccess; /* substitute pags */ |
| 2540 | else /* not found, add a new one if possible */ |
| 2541 | afs_AddAxs(tvc->Access, areq->uid, OutStatus->CallerAccess){ struct axscache *ac; if ((ac = axs_Alloc())) { ac->uid = (areq->uid); ac->axess = (afs_int32)(OutStatus->CallerAccess ); ac->next = (tvc->Access); tvc->Access = ac; }}; |
| 2542 | |
| 2543 | ReleaseWriteLock(&tvc->lock)do { ; (&tvc->lock)->excl_locked &= ~2; if ((& tvc->lock)->wait_states) Afs_Lock_ReleaseR(&tvc-> lock); (&tvc->lock)->pid_writer=0; } while (0); |
| 2544 | afs_Trace4(afs_iclSetp, CM_TRACE_STUFFVCACHE, ICL_TYPE_POINTER, tvc,(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event4(afs_iclSetp, (701087788L), (1<<24)+((2) <<18)+((2)<<12)+((7)<<6)+(7), (long)(tvc), ( long)(tvc->callback), (long)(tvc->cbExpires), (long)(tvc ->cbExpires - (time(((void *)0))))) : 0) |
| 2545 | ICL_TYPE_POINTER, tvc->callback, ICL_TYPE_INT32,(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event4(afs_iclSetp, (701087788L), (1<<24)+((2) <<18)+((2)<<12)+((7)<<6)+(7), (long)(tvc), ( long)(tvc->callback), (long)(tvc->cbExpires), (long)(tvc ->cbExpires - (time(((void *)0))))) : 0) |
| 2546 | tvc->cbExpires, ICL_TYPE_INT32, tvc->cbExpires - osi_Time())(((afs_iclSetp) && (afs_iclSetp->states & 2)) ? afs_icl_Event4(afs_iclSetp, (701087788L), (1<<24)+((2) <<18)+((2)<<12)+((7)<<6)+(7), (long)(tvc), ( long)(tvc->callback), (long)(tvc->cbExpires), (long)(tvc ->cbExpires - (time(((void *)0))))) : 0); |
| 2547 | /* |
| 2548 | * Release ref count... hope this guy stays around... |
| 2549 | */ |
| 2550 | afs_PutVCache(tvc); |
| 2551 | } /*afs_StuffVcache */ |
| 2552 | #endif |
| 2553 | |
| 2554 | /*! |
| 2555 | * Decrements the reference count on a cache entry. |
| 2556 | * |
| 2557 | * \param avc Pointer to the cache entry to decrement. |
| 2558 | * |
| 2559 | * \note Environment: Nothing interesting. |
| 2560 | */ |
| 2561 | void |
| 2562 | afs_PutVCache(struct vcache *avc) |
| 2563 | { |
| 2564 | AFS_STATCNT(afs_PutVCache)((afs_cmstats.callInfo.C_afs_PutVCache)++); |
| 2565 | #ifdef AFS_DARWIN80_ENV |
| 2566 | vnode_put(AFSTOV(avc)(&(avc)->v)); |
| 2567 | AFS_FAST_RELE(avc)do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( avc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2567);}while(0); if (--(((&(avc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(avc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 2568 | #else |
| 2569 | /* |
| 2570 | * Can we use a read lock here? |
| 2571 | */ |
| 2572 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 2573 | AFS_FAST_RELE(avc)do { do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); do{if (!(((&( avc)->v))->v_count > 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2573);}while(0); if (--(((&(avc)->v))->v_count) == 0) afs_inactive(((struct vcache *)((&(avc)->v))), get_user_struct ()->u_cred); } while(0); } while (0); |
| 2574 | ReleaseReadLock(&afs_xvcache)do { ; if (!(--((&afs_xvcache)->readers_reading)) && (&afs_xvcache)->wait_states) Afs_Lock_ReleaseW(&afs_xvcache ) ; if ( (&afs_xvcache)->pid_last_reader == (get_user_struct ()->u_procp->p_pid ) ) (&afs_xvcache)->pid_last_reader =0; } while (0); |
| 2575 | #endif |
| 2576 | } /*afs_PutVCache */ |
| 2577 | |
| 2578 | |
| 2579 | /*! |
| 2580 | * Reset a vcache entry, so local contents are ignored, and the |
| 2581 | * server will be reconsulted next time the vcache is used |
| 2582 | * |
| 2583 | * \param avc Pointer to the cache entry to reset |
| 2584 | * \param acred |
| 2585 | * |
| 2586 | * \note avc must be write locked on entry |
| 2587 | */ |
| 2588 | void |
| 2589 | afs_ResetVCache(struct vcache *avc, afs_ucred_tstruct usr_ucred *acred) |
| 2590 | { |
| 2591 | ObtainWriteLock(&afs_xcbhash, 456)do { ; if (!(&afs_xcbhash)->excl_locked && !(& afs_xcbhash)->readers_reading) (&afs_xcbhash) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xcbhash, 2); (&afs_xcbhash )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xcbhash)->src_indicator = 456; } while (0); |
| 2592 | afs_DequeueCallback(avc); |
| 2593 | avc->f.states &= ~(CStatd0x00000001 | CDirty0x00000020); /* next reference will re-stat */ |
| 2594 | ReleaseWriteLock(&afs_xcbhash)do { ; (&afs_xcbhash)->excl_locked &= ~2; if ((& afs_xcbhash)->wait_states) Afs_Lock_ReleaseR(&afs_xcbhash ); (&afs_xcbhash)->pid_writer=0; } while (0); |
| 2595 | /* now find the disk cache entries */ |
| 2596 | afs_TryToSmush(avc, acred, 1); |
| 2597 | osi_dnlc_purgedp(avc); |
| 2598 | if (avc->linkData && !(avc->f.states & CCore0x00000010)) { |
| 2599 | afs_osi_Free(avc->linkData, strlen(avc->linkData) + 1); |
| 2600 | avc->linkData = NULL((void *)0); |
| 2601 | } |
| 2602 | } |
| 2603 | |
| 2604 | /*! |
| 2605 | * Sleepa when searching for a vcache. Releases all the pending locks, |
| 2606 | * sleeps then obtains the previously released locks. |
| 2607 | * |
| 2608 | * \param vcache Enter sleep state. |
| 2609 | * \param flag Determines what locks to use. |
| 2610 | * |
| 2611 | * \return |
| 2612 | */ |
| 2613 | static void |
| 2614 | findvc_sleep(struct vcache *avc, int flag) |
| 2615 | { |
| 2616 | if (flag & IS_SLOCK4) { |
| 2617 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2618 | } else { |
| 2619 | if (flag & IS_WLOCK8) { |
| 2620 | ReleaseWriteLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~2; if ((& afs_xvcache)->wait_states) Afs_Lock_ReleaseR(&afs_xvcache ); (&afs_xvcache)->pid_writer=0; } while (0); |
| 2621 | } else { |
| 2622 | ReleaseReadLock(&afs_xvcache)do { ; if (!(--((&afs_xvcache)->readers_reading)) && (&afs_xvcache)->wait_states) Afs_Lock_ReleaseW(&afs_xvcache ) ; if ( (&afs_xvcache)->pid_last_reader == (get_user_struct ()->u_procp->p_pid ) ) (&afs_xvcache)->pid_last_reader =0; } while (0); |
| 2623 | } |
| 2624 | } |
| 2625 | afs_osi_Sleep(&avc->f.states); |
| 2626 | if (flag & IS_SLOCK4) { |
| 2627 | ObtainSharedLock(&afs_xvcache, 341)do { ; if (!(&afs_xvcache)->excl_locked) (&afs_xvcache ) -> excl_locked = 4; else Afs_Lock_Obtain(&afs_xvcache , 4); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 341 ; } while (0); |
| 2628 | } else { |
| 2629 | if (flag & IS_WLOCK8) { |
| 2630 | ObtainWriteLock(&afs_xvcache, 343)do { ; if (!(&afs_xvcache)->excl_locked && !(& afs_xvcache)->readers_reading) (&afs_xvcache) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 2); (&afs_xvcache )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xvcache)->src_indicator = 343; } while (0); |
| 2631 | } else { |
| 2632 | ObtainReadLock(&afs_xvcache)do { ; if (!((&afs_xvcache)->excl_locked & 2)) ((& afs_xvcache)->readers_reading)++; else Afs_Lock_Obtain(& afs_xvcache, 1); (&afs_xvcache)->pid_last_reader = (get_user_struct ()->u_procp->p_pid ); } while (0); |
| 2633 | } |
| 2634 | } |
| 2635 | } |
| 2636 | |
| 2637 | /*! |
| 2638 | * Add a reference on an existing vcache entry. |
| 2639 | * |
| 2640 | * \param tvc Pointer to the vcache. |
| 2641 | * |
| 2642 | * \note Environment: Must be called with at least one reference from |
| 2643 | * elsewhere on the vcache, even if that reference will be dropped. |
| 2644 | * The global lock is required. |
| 2645 | * |
| 2646 | * \return 0 on success, -1 on failure. |
| 2647 | */ |
| 2648 | |
| 2649 | int |
| 2650 | afs_RefVCache(struct vcache *tvc) |
| 2651 | { |
| 2652 | #ifdef AFS_DARWIN80_ENV |
| 2653 | vnode_t tvp; |
| 2654 | #endif |
| 2655 | |
| 2656 | /* AFS_STATCNT(afs_RefVCache); */ |
| 2657 | |
| 2658 | #ifdef AFS_DARWIN80_ENV |
| 2659 | tvp = AFSTOV(tvc)(&(tvc)->v); |
| 2660 | if (vnode_get(tvp)) |
| 2661 | return -1; |
| 2662 | if (vnode_ref(tvp)) { |
| 2663 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2663);}while(0); } while(0); |
| 2664 | /* AFSTOV(tvc) may be NULL */ |
| 2665 | vnode_put(tvp); |
| 2666 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2666);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 2667 | return -1; |
| 2668 | } |
| 2669 | #else |
| 2670 | osi_vnhold(tvc, 0)do { { ((&(tvc)->v))->v_count++; }; } while(0); |
| 2671 | #endif |
| 2672 | return 0; |
| 2673 | } /*afs_RefVCache */ |
| 2674 | |
| 2675 | /*! |
| 2676 | * Find a vcache entry given a fid. |
| 2677 | * |
| 2678 | * \param afid Pointer to the fid whose cache entry we desire. |
| 2679 | * \param retry (SGI-specific) tell the caller to drop the lock on xvcache, |
| 2680 | * unlock the vnode, and try again. |
| 2681 | * \param flag Bit 1 to specify whether to compute hit statistics. Not |
| 2682 | * set if FindVCache is called as part of internal bookkeeping. |
| 2683 | * |
| 2684 | * \note Environment: Must be called with the afs_xvcache lock at least held at |
| 2685 | * the read level. In order to do the VLRU adjustment, the xvcache lock |
| 2686 | * must be shared-- we upgrade it here. |
| 2687 | */ |
| 2688 | |
| 2689 | struct vcache * |
| 2690 | afs_FindVCache(struct VenusFid *afid, afs_int32 * retry, afs_int32 flag) |
| 2691 | { |
| 2692 | |
| 2693 | struct vcache *tvc; |
| 2694 | afs_int32 i; |
| 2695 | #ifdef AFS_DARWIN80_ENV |
| 2696 | struct vcache *deadvc = NULL((void *)0), *livevc = NULL((void *)0); |
| 2697 | vnode_t tvp; |
| 2698 | #endif |
| 2699 | |
| 2700 | AFS_STATCNT(afs_FindVCache)((afs_cmstats.callInfo.C_afs_FindVCache)++); |
| 2701 | |
| 2702 | findloop: |
| 2703 | i = VCHash(afid)(((afid)->Fid.Volume + (afid)->Fid.Vnode) & (1024 - 1)); |
| 2704 | for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) { |
| 2705 | if (FidMatches(afid, tvc)((tvc)->f.usr_fid.Fid.Vnode == (afid)->Fid.Vnode && (tvc)->f.usr_fid.Fid.Volume == (afid)->Fid.Volume && (tvc)->f.usr_fid.Cell == (afid)->Cell && ( (tvc )->f.usr_fid.Fid.Unique == (afid)->Fid.Unique || (!(afid )->Fid.Unique && ((tvc)->f.states & 0x00001000 ))))) { |
| 2706 | if (tvc->f.states & CVInit0x10000000) { |
| 2707 | findvc_sleep(tvc, flag); |
| 2708 | goto findloop; |
| 2709 | } |
| 2710 | #ifdef AFS_DARWIN80_ENV |
| 2711 | if (tvc->f.states & CDeadVnode) { |
| 2712 | findvc_sleep(tvc, flag); |
| 2713 | goto findloop; |
| 2714 | } |
| 2715 | #endif |
| 2716 | break; |
| 2717 | } |
| 2718 | } |
| 2719 | |
| 2720 | /* should I have a read lock on the vnode here? */ |
| 2721 | if (tvc) { |
| 2722 | if (retry) |
| 2723 | *retry = 0; |
| 2724 | #if defined(AFS_DARWIN80_ENV) |
| 2725 | tvp = AFSTOV(tvc)(&(tvc)->v); |
| 2726 | if (vnode_get(tvp)) |
| 2727 | tvp = NULL((void *)0); |
| 2728 | if (tvp && vnode_ref(tvp)) { |
| 2729 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2729);}while(0); } while(0); |
| 2730 | /* AFSTOV(tvc) may be NULL */ |
| 2731 | vnode_put(tvp); |
| 2732 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2732);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 2733 | tvp = NULL((void *)0); |
| 2734 | } |
| 2735 | if (!tvp) { |
| 2736 | tvc = NULL((void *)0); |
| 2737 | return tvc; |
| 2738 | } |
| 2739 | #elif defined(AFS_DARWIN_ENV) |
| 2740 | tvc->f.states |= CUBCinit; |
| 2741 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2741);}while(0); } while(0); |
| 2742 | if (UBCINFOMISSING(AFSTOV(tvc)(&(tvc)->v)) || |
| 2743 | UBCINFORECLAIMED(AFSTOV(tvc)(&(tvc)->v))) { |
| 2744 | ubc_info_init(AFSTOV(tvc)(&(tvc)->v)); |
| 2745 | } |
| 2746 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2746);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 2747 | tvc->f.states &= ~CUBCinit; |
| 2748 | #else |
| 2749 | osi_vnhold(tvc, retry)do { { ((&(tvc)->v))->v_count++; }; } while(0); /* already held, above */ |
| 2750 | if (retry && *retry) |
| 2751 | return 0; |
| 2752 | #endif |
| 2753 | /* |
| 2754 | * only move to front of vlru if we have proper vcache locking) |
| 2755 | */ |
| 2756 | if (flag & DO_VLRU2) { |
| 2757 | if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { |
| 2758 | refpanic("FindVC VLRU inconsistent1")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent1" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent1" ); |
| 2759 | } |
| 2760 | if (tvc->vlruq.next->prev != &(tvc->vlruq)) { |
| 2761 | refpanic("FindVC VLRU inconsistent1")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent1" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent1" ); |
| 2762 | } |
| 2763 | if (tvc->vlruq.prev->next != &(tvc->vlruq)) { |
| 2764 | refpanic("FindVC VLRU inconsistent2")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent2" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent2" ); |
| 2765 | } |
| 2766 | UpgradeSToWLock(&afs_xvcache, 26)do { ; if (!(&afs_xvcache)->readers_reading) (&afs_xvcache )->excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 6); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 26 ; } while (0); |
| 2767 | QRemove(&tvc->vlruq)((&tvc->vlruq)->next->prev = (&tvc->vlruq )->prev, (&tvc->vlruq)->prev->next = (&tvc ->vlruq)->next, (&tvc->vlruq)->prev = ((void * )0), (&tvc->vlruq)->next = ((void *)0)); |
| 2768 | QAdd(&VLRU, &tvc->vlruq)((&tvc->vlruq)->next = (&VLRU)->next, (& tvc->vlruq)->prev = (&VLRU), (&VLRU)->next-> prev = (&tvc->vlruq), (&VLRU)->next = (&tvc ->vlruq)); |
| 2769 | ConvertWToSLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked = 4; if((&afs_xvcache )->wait_states) Afs_Lock_ReleaseR(&afs_xvcache); } while (0); |
| 2770 | if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { |
| 2771 | refpanic("FindVC VLRU inconsistent1")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent1" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent1" ); |
| 2772 | } |
| 2773 | if (tvc->vlruq.next->prev != &(tvc->vlruq)) { |
| 2774 | refpanic("FindVC VLRU inconsistent2")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent2" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent2" ); |
| 2775 | } |
| 2776 | if (tvc->vlruq.prev->next != &(tvc->vlruq)) { |
| 2777 | refpanic("FindVC VLRU inconsistent3")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent3" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent3" ); |
| 2778 | } |
| 2779 | } |
| 2780 | vcachegen++; |
| 2781 | } |
| 2782 | |
| 2783 | if (flag & DO_STATS1) { |
| 2784 | if (tvc) |
| 2785 | afs_stats_cmperf.vcacheHits++; |
| 2786 | else |
| 2787 | afs_stats_cmperf.vcacheMisses++; |
| 2788 | if (afs_IsPrimaryCellNum(afid->Cell)) |
| 2789 | afs_stats_cmperf.vlocalAccesses++; |
| 2790 | else |
| 2791 | afs_stats_cmperf.vremoteAccesses++; |
| 2792 | } |
| 2793 | return tvc; |
| 2794 | } /*afs_FindVCache */ |
| 2795 | |
| 2796 | /*! |
| 2797 | * Find a vcache entry given a fid. Does a wildcard match on what we |
| 2798 | * have for the fid. If more than one entry, don't return anything. |
| 2799 | * |
| 2800 | * \param avcp Fill in pointer if we found one and only one. |
| 2801 | * \param afid Pointer to the fid whose cache entry we desire. |
| 2802 | * \param retry (SGI-specific) tell the caller to drop the lock on xvcache, |
| 2803 | * unlock the vnode, and try again. |
| 2804 | * \param flags bit 1 to specify whether to compute hit statistics. Not |
| 2805 | * set if FindVCache is called as part of internal bookkeeping. |
| 2806 | * |
| 2807 | * \note Environment: Must be called with the afs_xvcache lock at least held at |
| 2808 | * the read level. In order to do the VLRU adjustment, the xvcache lock |
| 2809 | * must be shared-- we upgrade it here. |
| 2810 | * |
| 2811 | * \return Number of matches found. |
| 2812 | */ |
| 2813 | |
| 2814 | int afs_duplicate_nfs_fids = 0; |
| 2815 | |
| 2816 | afs_int32 |
| 2817 | afs_NFSFindVCache(struct vcache **avcp, struct VenusFid *afid) |
| 2818 | { |
| 2819 | struct vcache *tvc; |
| 2820 | afs_int32 i; |
| 2821 | afs_int32 count = 0; |
| 2822 | struct vcache *found_tvc = NULL((void *)0); |
| 2823 | #ifdef AFS_DARWIN80_ENV |
| 2824 | vnode_t tvp; |
| 2825 | #endif |
| 2826 | |
| 2827 | AFS_STATCNT(afs_FindVCache)((afs_cmstats.callInfo.C_afs_FindVCache)++); |
| 2828 | |
| 2829 | loop: |
| 2830 | |
| 2831 | ObtainSharedLock(&afs_xvcache, 331)do { ; if (!(&afs_xvcache)->excl_locked) (&afs_xvcache ) -> excl_locked = 4; else Afs_Lock_Obtain(&afs_xvcache , 4); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 331 ; } while (0); |
| 2832 | |
| 2833 | i = VCHash(afid)(((afid)->Fid.Volume + (afid)->Fid.Vnode) & (1024 - 1)); |
| 2834 | for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) { |
| 2835 | /* Match only on what we have.... */ |
| 2836 | if (((tvc->f.fidusr_fid.Fid.Vnode & 0xffff) == afid->Fid.Vnode) |
| 2837 | && (tvc->f.fidusr_fid.Fid.Volume == afid->Fid.Volume) |
| 2838 | && ((tvc->f.fidusr_fid.Fid.Unique & 0xffffff) == afid->Fid.Unique) |
| 2839 | && (tvc->f.fidusr_fid.Cell == afid->Cell)) { |
| 2840 | if (tvc->f.states & CVInit0x10000000) { |
| 2841 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2842 | afs_osi_Sleep(&tvc->f.states); |
| 2843 | goto loop; |
| 2844 | } |
| 2845 | #ifdef AFS_DARWIN80_ENV |
| 2846 | if (tvc->f.states & CDeadVnode) { |
| 2847 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2848 | afs_osi_Sleep(&tvc->f.states); |
| 2849 | goto loop; |
| 2850 | } |
| 2851 | tvp = AFSTOV(tvc)(&(tvc)->v); |
| 2852 | if (vnode_get(tvp)) { |
| 2853 | /* This vnode no longer exists. */ |
| 2854 | continue; |
| 2855 | } |
| 2856 | if (vnode_ref(tvp)) { |
| 2857 | /* This vnode no longer exists. */ |
| 2858 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2858);}while(0); } while(0); |
| 2859 | /* AFSTOV(tvc) may be NULL */ |
| 2860 | vnode_put(tvp); |
| 2861 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 2861);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 2862 | continue; |
| 2863 | } |
| 2864 | #endif /* AFS_DARWIN80_ENV */ |
| 2865 | count++; |
| 2866 | if (found_tvc) { |
| 2867 | /* Duplicates */ |
| 2868 | afs_duplicate_nfs_fids++; |
| 2869 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2870 | #ifdef AFS_DARWIN80_ENV |
| 2871 | /* Drop our reference counts. */ |
| 2872 | vnode_put(AFSTOV(tvc)(&(tvc)->v)); |
| 2873 | vnode_put(AFSTOV(found_tvc)(&(found_tvc)->v)); |
| 2874 | #endif |
| 2875 | return count; |
| 2876 | } |
| 2877 | found_tvc = tvc; |
| 2878 | } |
| 2879 | } |
| 2880 | |
| 2881 | tvc = found_tvc; |
| 2882 | /* should I have a read lock on the vnode here? */ |
| 2883 | if (tvc) { |
| 2884 | #ifndef AFS_DARWIN80_ENV |
| 2885 | #if defined(AFS_SGI_ENV) && !defined(AFS_SGI53_ENV) |
| 2886 | afs_int32 retry = 0; |
| 2887 | osi_vnhold(tvc, &retry)do { { ((&(tvc)->v))->v_count++; }; } while(0); |
| 2888 | if (retry) { |
| 2889 | count = 0; |
| 2890 | found_tvc = (struct vcache *)0; |
| 2891 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2892 | spunlock_psema(tvc->v.v_lock, retry, &tvc->v.v_sync, PINOD); |
| 2893 | goto loop; |
| 2894 | } |
| 2895 | #else |
| 2896 | osi_vnhold(tvc, (int *)0)do { { ((&(tvc)->v))->v_count++; }; } while(0); /* already held, above */ |
| 2897 | #endif |
| 2898 | #endif |
| 2899 | /* |
| 2900 | * We obtained the xvcache lock above. |
| 2901 | */ |
| 2902 | if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { |
| 2903 | refpanic("FindVC VLRU inconsistent1")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent1" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent1" ); |
| 2904 | } |
| 2905 | if (tvc->vlruq.next->prev != &(tvc->vlruq)) { |
| 2906 | refpanic("FindVC VLRU inconsistent1")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent1" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent1" ); |
| 2907 | } |
| 2908 | if (tvc->vlruq.prev->next != &(tvc->vlruq)) { |
| 2909 | refpanic("FindVC VLRU inconsistent2")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent2" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent2" ); |
| 2910 | } |
| 2911 | UpgradeSToWLock(&afs_xvcache, 568)do { ; if (!(&afs_xvcache)->readers_reading) (&afs_xvcache )->excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 6); (&afs_xvcache)->pid_writer = (get_user_struct()-> u_procp->p_pid ); (&afs_xvcache)->src_indicator = 568 ; } while (0); |
| 2912 | QRemove(&tvc->vlruq)((&tvc->vlruq)->next->prev = (&tvc->vlruq )->prev, (&tvc->vlruq)->prev->next = (&tvc ->vlruq)->next, (&tvc->vlruq)->prev = ((void * )0), (&tvc->vlruq)->next = ((void *)0)); |
| 2913 | QAdd(&VLRU, &tvc->vlruq)((&tvc->vlruq)->next = (&VLRU)->next, (& tvc->vlruq)->prev = (&VLRU), (&VLRU)->next-> prev = (&tvc->vlruq), (&VLRU)->next = (&tvc ->vlruq)); |
| 2914 | ConvertWToSLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked = 4; if((&afs_xvcache )->wait_states) Afs_Lock_ReleaseR(&afs_xvcache); } while (0); |
| 2915 | if ((VLRU.next->prev != &VLRU) || (VLRU.prev->next != &VLRU)) { |
| 2916 | refpanic("FindVC VLRU inconsistent1")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent1" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent1" ); |
| 2917 | } |
| 2918 | if (tvc->vlruq.next->prev != &(tvc->vlruq)) { |
| 2919 | refpanic("FindVC VLRU inconsistent2")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent2" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent2" ); |
| 2920 | } |
| 2921 | if (tvc->vlruq.prev->next != &(tvc->vlruq)) { |
| 2922 | refpanic("FindVC VLRU inconsistent3")if (afs_norefpanic) { printf( "FindVC VLRU inconsistent3" ); afs_norefpanic ++;} else osi_Panic( "FindVC VLRU inconsistent3" ); |
| 2923 | } |
| 2924 | } |
| 2925 | vcachegen++; |
| 2926 | |
| 2927 | if (tvc) |
| 2928 | afs_stats_cmperf.vcacheHits++; |
| 2929 | else |
| 2930 | afs_stats_cmperf.vcacheMisses++; |
| 2931 | if (afs_IsPrimaryCellNum(afid->Cell)) |
| 2932 | afs_stats_cmperf.vlocalAccesses++; |
| 2933 | else |
| 2934 | afs_stats_cmperf.vremoteAccesses++; |
| 2935 | |
| 2936 | *avcp = tvc; /* May be null */ |
| 2937 | |
| 2938 | ReleaseSharedLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~(4 | 2); if ((&afs_xvcache)->wait_states) Afs_Lock_ReleaseR(& afs_xvcache); (&afs_xvcache)->pid_writer=0; } while (0 ); |
| 2939 | return (tvc ? 1 : 0); |
| 2940 | |
| 2941 | } /*afs_NFSFindVCache */ |
| 2942 | |
| 2943 | |
| 2944 | |
| 2945 | |
| 2946 | /*! |
| 2947 | * Initialize vcache related variables |
| 2948 | * |
| 2949 | * \param astatSize |
| 2950 | */ |
| 2951 | void |
| 2952 | afs_vcacheInit(int astatSize) |
| 2953 | { |
| 2954 | #if !defined(AFS_LINUX22_ENV) |
| 2955 | struct vcache *tvp; |
| 2956 | #endif |
| 2957 | int i; |
| 2958 | if (!afs_maxvcount) { |
| 2959 | afs_maxvcount = astatSize; /* no particular limit on linux? */ |
| 2960 | } |
| 2961 | #if !defined(AFS_LINUX22_ENV) |
| 2962 | freeVCList = NULL((void *)0); |
| 2963 | #endif |
| 2964 | |
| 2965 | AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache")Lock_Init(&afs_xvcache); |
| 2966 | LOCK_INIT(&afs_xvcb, "afs_xvcb")Lock_Init(&afs_xvcb); |
| 2967 | |
| 2968 | #if !defined(AFS_LINUX22_ENV) |
| 2969 | /* Allocate and thread the struct vcache entries */ |
| 2970 | tvp = afs_osi_Alloc(astatSize * sizeof(struct vcache)); |
| 2971 | osi_Assert(tvp != NULL)(void)((tvp != ((void *)0)) || (osi_AssertFailK( "tvp != NULL" , "/home/wollman/openafs/src/afs/afs_vcache.c", 2971), 0)); |
| 2972 | memset(tvp, 0, sizeof(struct vcache) * astatSize); |
| 2973 | |
| 2974 | Initial_freeVCList = tvp; |
| 2975 | freeVCList = &(tvp[0]); |
| 2976 | for (i = 0; i < astatSize - 1; i++) { |
| 2977 | tvp[i].nextfree = &(tvp[i + 1]); |
| 2978 | } |
| 2979 | tvp[astatSize - 1].nextfree = NULL((void *)0); |
| 2980 | # ifdef KERNEL_HAVE_PIN |
| 2981 | pin((char *)tvp, astatSize * sizeof(struct vcache)); /* XXX */ |
| 2982 | # endif |
| 2983 | #endif |
| 2984 | |
| 2985 | #if defined(AFS_SGI_ENV) |
| 2986 | for (i = 0; i < astatSize; i++) { |
| 2987 | char name[METER_NAMSZ]; |
| 2988 | struct vcache *tvc = &tvp[i]; |
| 2989 | |
| 2990 | tvc->v.v_number = ++afsvnumbers; |
| 2991 | tvc->vc_rwlockid = OSI_NO_LOCKID; |
| 2992 | initnsema(&tvc->vc_rwlock, 1, |
| 2993 | makesname(name, "vrw", tvc->v.v_number)); |
| 2994 | #ifndef AFS_SGI53_ENV |
| 2995 | initnsema(&tvc->v.v_sync, 0, makesname(name, "vsy", tvc->v.v_number)); |
| 2996 | #endif |
| 2997 | #ifndef AFS_SGI62_ENV |
| 2998 | initnlock(&tvc->v.v_lock, makesname(name, "vlk", tvc->v.v_number)); |
| 2999 | #endif /* AFS_SGI62_ENV */ |
| 3000 | } |
| 3001 | #endif |
| 3002 | QInit(&VLRU)((&VLRU)->prev = (&VLRU)->next = (&VLRU)); |
| 3003 | for(i = 0; i < VCSIZE1024; ++i) |
| 3004 | QInit(&afs_vhashTV[i])((&afs_vhashTV[i])->prev = (&afs_vhashTV[i])->next = (&afs_vhashTV[i])); |
| 3005 | } |
| 3006 | |
| 3007 | /*! |
| 3008 | * Shutdown vcache. |
| 3009 | */ |
| 3010 | void |
| 3011 | shutdown_vcache(void) |
| 3012 | { |
| 3013 | int i; |
| 3014 | struct afs_cbr *tsp; |
| 3015 | /* |
| 3016 | * XXX We may potentially miss some of the vcaches because if when |
| 3017 | * there are no free vcache entries and all the vcache entries are active |
| 3018 | * ones then we allocate an additional one - admittedly we almost never |
| 3019 | * had that occur. |
| 3020 | */ |
| 3021 | |
| 3022 | { |
| 3023 | struct afs_q *tq, *uq = NULL((void *)0); |
| 3024 | struct vcache *tvc; |
| 3025 | for (tq = VLRU.prev; tq != &VLRU; tq = uq) { |
| 3026 | tvc = QTOV(tq)((struct vcache *)((char *)(tq)-(char *)(&((struct vcache *)((void *)0))->vlruq))); |
| 3027 | uq = QPrev(tq)((tq)->prev); |
| 3028 | if (tvc->mvid) { |
| 3029 | osi_FreeSmallSpace(tvc->mvid); |
| 3030 | tvc->mvid = (struct VenusFid *)0; |
| 3031 | } |
| 3032 | #ifdef AFS_AIX_ENV |
| 3033 | aix_gnode_rele(AFSTOV(tvc)(&(tvc)->v)); |
| 3034 | #endif |
| 3035 | if (tvc->linkData) { |
| 3036 | afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1); |
| 3037 | tvc->linkData = 0; |
| 3038 | } |
| 3039 | } |
| 3040 | /* |
| 3041 | * Also free the remaining ones in the Cache |
| 3042 | */ |
| 3043 | for (i = 0; i < VCSIZE1024; i++) { |
| 3044 | for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) { |
| 3045 | if (tvc->mvid) { |
| 3046 | osi_FreeSmallSpace(tvc->mvid); |
| 3047 | tvc->mvid = (struct VenusFid *)0; |
| 3048 | } |
| 3049 | #ifdef AFS_AIX_ENV |
| 3050 | if (tvc->v.v_gnode) |
| 3051 | afs_osi_Free(tvc->v.v_gnode, sizeof(struct gnode)); |
| 3052 | #ifdef AFS_AIX32_ENV |
| 3053 | if (tvc->segid) { |
| 3054 | AFS_GUNLOCK()do { do { if (!(pthread_self() == afs_global_owner)) { osi_Panic ("afs global lock not held"); } } while(0); memset(&afs_global_owner , 0, sizeof(pthread_t)); do{if (!(pthread_mutex_unlock(&afs_global_lock ) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 3054);}while(0); } while(0); |
| 3055 | vms_delete(tvc->segid); |
| 3056 | AFS_GLOCK()do { do{if (!(pthread_mutex_lock(&afs_global_lock) == 0)) AssertionFailed("/home/wollman/openafs/src/afs/afs_vcache.c" , 3056);}while(0); afs_global_owner = pthread_self(); } while (0); |
| 3057 | tvc->segid = tvc->vmh = NULL((void *)0); |
| 3058 | if (VREFCOUNT_GT(tvc,0)((tvc)->v.v_count > (0))) |
| 3059 | osi_Panic("flushVcache: vm race"); |
| 3060 | } |
| 3061 | if (tvc->credp) { |
| 3062 | crfreeusr_crfree(tvc->credp); |
| 3063 | tvc->credp = NULL((void *)0); |
| 3064 | } |
| 3065 | #endif |
| 3066 | #endif |
| 3067 | #if defined(AFS_SUN5_ENV) |
| 3068 | if (tvc->credp) { |
| 3069 | crfreeusr_crfree(tvc->credp); |
| 3070 | tvc->credp = NULL((void *)0); |
| 3071 | } |
| 3072 | #endif |
| 3073 | if (tvc->linkData) { |
| 3074 | afs_osi_Free(tvc->linkData, strlen(tvc->linkData) + 1); |
| 3075 | tvc->linkData = 0; |
| 3076 | } |
| 3077 | |
| 3078 | if (tvc->Access) |
| 3079 | afs_FreeAllAxs(&(tvc->Access)); |
| 3080 | } |
| 3081 | afs_vhashT[i] = 0; |
| 3082 | } |
| 3083 | } |
| 3084 | /* |
| 3085 | * Free any leftover callback queue |
| 3086 | */ |
| 3087 | for (i = 0; i < afs_stats_cmperf.CallBackAlloced; i++) { |
| 3088 | tsp = afs_cbrHeads[i]; |
| 3089 | afs_cbrHeads[i] = 0; |
| 3090 | afs_osi_Free((char *)tsp, AFS_NCBRS1024 * sizeof(struct afs_cbr)); |
| 3091 | } |
| 3092 | afs_cbrSpace = 0; |
| 3093 | |
| 3094 | #if !defined(AFS_LINUX22_ENV) |
| 3095 | afs_osi_Free(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache)); |
| 3096 | |
| 3097 | # ifdef KERNEL_HAVE_PIN |
| 3098 | unpin(Initial_freeVCList, afs_cacheStats * sizeof(struct vcache)); |
| 3099 | # endif |
| 3100 | |
| 3101 | freeVCList = Initial_freeVCList = 0; |
| 3102 | #endif |
| 3103 | |
| 3104 | AFS_RWLOCK_INIT(&afs_xvcache, "afs_xvcache")Lock_Init(&afs_xvcache); |
| 3105 | LOCK_INIT(&afs_xvcb, "afs_xvcb")Lock_Init(&afs_xvcb); |
| 3106 | QInit(&VLRU)((&VLRU)->prev = (&VLRU)->next = (&VLRU)); |
| 3107 | for(i = 0; i < VCSIZE1024; ++i) |
| 3108 | QInit(&afs_vhashTV[i])((&afs_vhashTV[i])->prev = (&afs_vhashTV[i])->next = (&afs_vhashTV[i])); |
| 3109 | } |
| 3110 | |
| 3111 | void |
| 3112 | afs_DisconGiveUpCallbacks(void) |
| 3113 | { |
| 3114 | int i; |
| 3115 | struct vcache *tvc; |
| 3116 | int nq=0; |
| 3117 | |
| 3118 | ObtainWriteLock(&afs_xvcache, 1002)do { ; if (!(&afs_xvcache)->excl_locked && !(& afs_xvcache)->readers_reading) (&afs_xvcache) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 2); (&afs_xvcache )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xvcache)->src_indicator = 1002; } while (0); /* XXX - should be a unique number */ |
| 3119 | |
| 3120 | retry: |
| 3121 | /* Somehow, walk the set of vcaches, with each one coming out as tvc */ |
| 3122 | for (i = 0; i < VCSIZE1024; i++) { |
| 3123 | for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) { |
| 3124 | int slept = 0; |
| 3125 | if (afs_QueueVCB(tvc, &slept)) { |
| 3126 | tvc->callback = NULL((void *)0); |
| 3127 | nq++; |
| 3128 | } |
| 3129 | if (slept) { |
| 3130 | goto retry; |
| 3131 | } |
| 3132 | } |
| 3133 | } |
| 3134 | |
| 3135 | ReleaseWriteLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~2; if ((& afs_xvcache)->wait_states) Afs_Lock_ReleaseR(&afs_xvcache ); (&afs_xvcache)->pid_writer=0; } while (0); |
| 3136 | |
| 3137 | afs_FlushVCBs(2); |
| 3138 | } |
| 3139 | |
| 3140 | /*! |
| 3141 | * |
| 3142 | * Clear the Statd flag from all vcaches |
| 3143 | * |
| 3144 | * This function removes the Statd flag from all vcaches. It's used by |
| 3145 | * disconnected mode to tidy up during reconnection |
| 3146 | * |
| 3147 | */ |
| 3148 | void |
| 3149 | afs_ClearAllStatdFlag(void) |
| 3150 | { |
| 3151 | int i; |
| 3152 | struct vcache *tvc; |
| 3153 | |
| 3154 | ObtainWriteLock(&afs_xvcache, 715)do { ; if (!(&afs_xvcache)->excl_locked && !(& afs_xvcache)->readers_reading) (&afs_xvcache) -> excl_locked = 2; else Afs_Lock_Obtain(&afs_xvcache, 2); (&afs_xvcache )->pid_writer = (get_user_struct()->u_procp->p_pid ) ; (&afs_xvcache)->src_indicator = 715; } while (0); |
| 3155 | |
| 3156 | for (i = 0; i < VCSIZE1024; i++) { |
| 3157 | for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) { |
| 3158 | tvc->f.states &= ~(CStatd0x00000001|CUnique0x00001000); |
| 3159 | } |
| 3160 | } |
| 3161 | ReleaseWriteLock(&afs_xvcache)do { ; (&afs_xvcache)->excl_locked &= ~2; if ((& afs_xvcache)->wait_states) Afs_Lock_ReleaseR(&afs_xvcache ); (&afs_xvcache)->pid_writer=0; } while (0); |
| 3162 | } |