src/afs/UKERNEL/osi_vfsops.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
  14 #include "afs/sysincludes.h"    /* Standard vendor system headers */
  15 #include "afsincludes.h"        /* Afs-based standard headers */
  16 #include "afs/afs_stats.h"      /* statistics stuff */
  17
  18 struct vfsops Afs_vfsops = {
  19     afs_mount,
  20     afs_unmount,
  21     afs_root,
  22     afs_statfs,
  23     afs_sync,
  24 };
  25
  26 struct vfs *afs_globalVFS = 0;
  27 struct vcache *afs_globalVp = 0;
  28 int afs_rootCellIndex = 0;
  29
  30 #if !defined(AFS_USR_AIX_ENV)
  31 #include "sys/syscall.h"
  32 #endif
  33
  34 int
  35 afs_mount(struct vfs *afsp, char *path, void *data)
  36 {
  37     AFS_STATCNT(afs_mount);
  38
  39     if (afs_globalVFS) {
  40         /* Don't allow remounts since some system (like AIX) don't handle it well */
  41         return (setuerror(EBUSY));
  42     }
  43     afs_globalVFS = afsp;
  44     afsp->vfs_bsize = 8192;
  45     afsp->vfs_fsid.val[0] = AFS_VFSMAGIC;       /* magic */
  46     afsp->vfs_fsid.val[1] = (intptr_t)AFS_VFSFSID;
  47
  48     return 0;
  49 }
  50
  51 int
  52 afs_unmount(struct vfs *afsp)
  53 {
  54     AFS_STATCNT(afs_unmount);
  55     afs_globalVFS = 0;
  56     afs_shutdown();
  57     return 0;
  58 }
  59
  60 int
  61 afs_root(OSI_VFS_DECL(afsp), struct vnode **avpp)
  62 {
  63     afs_int32 code = 0;
  64     struct vrequest treq;
  65     struct vcache *tvp = 0;
  66     OSI_VFS_CONVERT(afsp);
  67
  68     AFS_STATCNT(afs_root);
  69     if (afs_globalVp && (afs_globalVp->f.states & CStatd)) {
  70         tvp = afs_globalVp;
  71     } else {
  72         if (afs_globalVp) {
  73             afs_PutVCache(afs_globalVp);
  74             afs_globalVp = NULL;
  75         }
  76
  77         if (!(code = afs_InitReq(&treq, get_user_struct()->u_cred))
  78             && !(code = afs_CheckInit())) {
  79             tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
  80             /* we really want this to stay around */
  81             if (tvp) {
  82                 afs_globalVp = tvp;
  83             } else
  84                 code = EIO;
  85         }
  86     }
  87     if (tvp) {
  88         VN_HOLD(AFSTOV(tvp));
  89
  90         AFSTOV(tvp)->v_flag |= VROOT;   /* No-op on Ultrix 2.2 */
  91         afs_globalVFS = afsp;
  92         *avpp = AFSTOV(tvp);
  93     }
  94
  95     afs_Trace3(afs_iclSetp, CM_TRACE_GOPEN, ICL_TYPE_POINTER, *avpp,
  96                ICL_TYPE_INT32, 0, ICL_TYPE_INT32, code);
  97     return code;
  98 }
  99
 100 int
 101 afs_sync(struct vfs *afsp)
 102 {
 103     AFS_STATCNT(afs_sync);
 104     return 0;
 105 }
 106
 107 int
 108 afs_statfs(struct vfs *afsp, struct statfs *abp)
 109 {
 110     AFS_STATCNT(afs_statfs);
 111     abp->f_type = 0;
 112     abp->f_bsize = afsp->vfs_bsize;
 113     abp->f_fsid.val[0] = AFS_VFSMAGIC;  /* magic */
 114     abp->f_fsid.val[1] = (intptr_t)AFS_VFSFSID;
 115     return 0;
 116 }
 117
 118 int
 119 afs_statvfs(struct vfs *afsp, struct statvfs *abp)
 120 {
 121     AFS_STATCNT(afs_statfs);
 122
 123     abp->f_frsize = 1024;
 124     abp->f_bsize = afsp->vfs_bsize;
 125     abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files =
 126       abp->f_favail = abp->f_ffree = AFS_VFS_FAKEFREE;
 127
 128 #ifdef AFS_USR_AIX_ENV
 129     abp->f_fsid.val[0] = AFS_VFSMAGIC;
 130     abp->f_fsid.val[1] = AFS_VFSFSID;
 131 #else
 132     abp->f_fsid = (AFS_VFSMAGIC << 16) || AFS_VFSFSID;
 133 #endif
 134
 135     return 0;
 136 }
 137
 138 int
 139 afs_mountroot(void)
 140 {
 141     AFS_STATCNT(afs_mountroot);
 142     return (EINVAL);
 143 }
 144
 145 int
 146 afs_swapvp(void)
 147 {
 148     AFS_STATCNT(afs_swapvp);
 149     return (EINVAL);
 150 }