2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afsconfig.h>
11 #include "afs/param.h"
13 #include "afs/sysincludes.h" /*Standard vendor system headers */
14 #include "afsincludes.h" /*AFS-based standard headers */
17 osi_TryEvictVCache(struct vcache *avc, int *slept, int defersleep)
21 if (!VREFCOUNT_GT(avc,0)
22 && avc->opens == 0 && (avc->f.states & CUnlinkedDel) == 0) {
23 code = afs_FlushVCache(avc, slept);
35 avc = afs_osi_Alloc(sizeof(struct vcache));
43 osi_PrePopulateVCache(struct vcache *avc)
45 memset(avc, 0, sizeof(struct vcache));
47 QInit(&avc->multiPage);
49 AFS_RWLOCK_INIT(&avc->vlock, "vcache vlock");
51 rw_init(&avc->rwlock, "vcache rwlock", RW_DEFAULT, NULL);
53 #ifndef AFS_SUN511_ENV
54 /* This is required if the kaio (kernel aynchronous io)
55 ** module is installed. Inside the kernel, the function
56 ** check_vp( common/os/aio.c) checks to see if the kernel has
57 ** to provide asynchronous io for this vnode. This
58 ** function extracts the device number by following the
59 ** v_data field of the vnode. If we do not set this field
60 ** then the system panics. The value of the v_data field
61 ** is not really important for AFS vnodes because the kernel
62 ** does not do asynchronous io for regular files. Hence,
63 ** for the time being, we fill up the v_data field with the
64 ** vnode pointer itself. */
65 avc->v.v_data = (char *)avc;
66 #endif /* !AFS_SUN511_ENV */
70 osi_AttachVnode(struct vcache *avc, int seq)
75 osi_Assert(AFSTOV(avc) == NULL);
77 vp = vn_alloc(KM_SLEEP);
78 osi_Assert(vp != NULL);
86 osi_PostPopulateVCache(struct vcache *avc)
88 AFSTOV(avc)->v_op = afs_ops;
89 AFSTOV(avc)->v_vfsp = afs_globalVFS;
92 /* Normally we do this in osi_vnhold when we notice the ref count went from
93 * 0 -> 1. But if we just setup or reused a vcache, we set the refcount to
94 * 1 directly. So, we must explicitly VFS_HOLD here. */
95 VFS_HOLD(afs_globalVFS);
99 osi_vnhold(struct vcache *avc)
101 struct vnode *vp = AFSTOV(avc);
104 mutex_enter(&vp->v_lock);
105 prevcount = vp->v_count++;
106 mutex_exit(&vp->v_lock);
108 if (prevcount == 0) {
109 VFS_HOLD(afs_globalVFS);