src/afs/OBSD/osi_vcache.c

   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 #include <afsconfig.h>
  11 #include "afs/param.h"
  12
  13 #include "afs/sysincludes.h"    /*Standard vendor system headers */
  14 #include "afsincludes.h"        /*AFS-based standard headers */
  15
  16 int
  17 osi_TryEvictVCache(struct vcache *avc, int *slept, int defersleep) {
  18     *slept = 0;
  19
  20     if (!VREFCOUNT_GT(avc,0)
  21         && avc->opens == 0 && (avc->f.states & CUnlinkedDel) == 0) {
  22         /*
  23          * vgone() reclaims the vnode, which calls afs_FlushVCache(),
  24          * then it puts the vnode on the free list.
  25          * If we don't do this we end up with a cleaned vnode that's
  26          * not on the free list.
  27          */
  28         AFS_GUNLOCK();
  29         vgone(AFSTOV(avc));
  30         AFS_GLOCK();
  31         return 1;
  32     }
  33     return 0;
  34 }
  35
  36 struct vcache *
  37 osi_NewVnode(void) {
  38     struct vcache *tvc;
  39
  40     tvc = afs_osi_Alloc(sizeof(struct vcache));
  41     tvc->v = NULL; /* important to clean this, or use memset 0 */
  42
  43     return tvc;
  44 }
  45
  46 void
  47 osi_PrePopulateVCache(struct vcache *avc) {
  48     memset(avc, 0, sizeof(struct vcache));
  49 }
  50
  51 void
  52 osi_AttachVnode(struct vcache *avc, int seq) {
  53     ReleaseWriteLock(&afs_xvcache);
  54     AFS_GUNLOCK();
  55     afs_obsd_getnewvnode(avc);  /* includes one refcount */
  56     AFS_GLOCK();
  57     ObtainWriteLock(&afs_xvcache,337);
  58     lockinit(&avc->rwlock, PINOD, "vcache", 0, 0);
  59 }
  60
  61 void
  62 osi_PostPopulateVCache(struct vcache *avc) {
  63     AFSTOV(avc)->v_mount = afs_globalVFS;
  64     vSetType(avc, VREG);
  65 }
  66