src/afs/AIX/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 extern struct vnodeops *afs_ops;
  17
  18 int
  19 osi_TryEvictVCache(struct vcache *avc, int *slept, int defersleep) {
  20      int code;
  21      if (!VREFCOUNT_GT(avc,0)
  22          && avc->opens == 0 && (avc->f.states & CUnlinkedDel) == 0) {
  23         code = afs_FlushVCache(avc, slept);
  24         if (code == 0)
  25             return 1;
  26      }
  27      return 0;
  28 }
  29
  30 struct vcache *
  31 osi_NewVnode(void) {
  32     struct vcache *tvc;
  33
  34     tvc = afs_osi_Alloc(sizeof(struct vcache));
  35     osi_Assert(tvc != NULL);
  36
  37 #ifdef  KERNEL_HAVE_PIN
  38     pin((char *)tvc, sizeof(struct vcache));    /* XXX */
  39 #endif
  40
  41     return tvc;
  42 }
  43
  44 void
  45 osi_PrePopulateVCache(struct vcache *avc) {
  46     memset(avc, 0, sizeof(struct vcache));
  47
  48 #ifdef  AFS_AIX32_ENV
  49     LOCK_INIT(&avc->pvmlock, "vcache pvmlock");
  50     avc->vmh = avc->segid = NULL;
  51     avc->credp = NULL;
  52 #endif
  53
  54     /* Don't forget to free the gnode space */
  55     avc->v.v_gnode = osi_AllocSmallSpace(sizeof(struct gnode));
  56     memset(avc->v.v_gnode, 0, sizeof(struct gnode));
  57 }
  58
  59 void
  60 osi_AttachVnode(struct vcache *avc, int seq) { }
  61
  62 void
  63 osi_PostPopulateVCache(struct vcache *avc) {
  64     avc->v.v_op = afs_ops;
  65
  66     avc->v.v_vfsp = afs_globalVFS;
  67     avc->v.v_type = VREG;
  68
  69     avc->v.v_vfsnext = afs_globalVFS->vfs_vnodes;       /* link off vfs */
  70     avc->v.v_vfsprev = NULL;
  71     afs_globalVFS->vfs_vnodes = &avc->v;
  72     if (avc->v.v_vfsnext != NULL)
  73         avc->v.v_vfsnext->v_vfsprev = &avc->v;
  74     avc->v.v_next = avc->v.v_gnode->gn_vnode;   /*Single vnode per gnode for us! */
  75     avc->v.v_gnode->gn_vnode = &avc->v;
  76 }
  77