summaryrefslogtreecommitdiff
path: root/dialects/hpux/kmem/dnode2.c
diff options
context:
space:
mode:
Diffstat (limited to 'dialects/hpux/kmem/dnode2.c')
-rw-r--r--dialects/hpux/kmem/dnode2.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/dialects/hpux/kmem/dnode2.c b/dialects/hpux/kmem/dnode2.c
new file mode 100644
index 0000000..3429831
--- /dev/null
+++ b/dialects/hpux/kmem/dnode2.c
@@ -0,0 +1,371 @@
+/*
+ * dnode2.c - /dev/kmem-based HP-UX AFS support
+ */
+
+
+/*
+ * Copyright 1996 Purdue Research Foundation, West Lafayette, Indiana
+ * 47907. All rights reserved.
+ *
+ * Written by Victor A. Abell
+ *
+ * This software is not subject to any license of the American Telephone
+ * and Telegraph Company or the Regents of the University of California.
+ *
+ * Permission is granted to anyone to use this software for any purpose on
+ * any computer system, and to alter it and redistribute it freely, subject
+ * to the following restrictions:
+ *
+ * 1. Neither the authors nor Purdue University are responsible for any
+ * consequences of the use of this software.
+ *
+ * 2. The origin of this software must not be misrepresented, either by
+ * explicit claim or by omission. Credit to the authors and Purdue
+ * University must appear in documentation and sources.
+ *
+ * 3. Altered versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ *
+ * 4. This notice may not be removed or altered.
+ */
+
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright 1996 Purdue Research Foundation.\nAll rights reserved.\n";
+static char *rcsid = "$Id: dnode2.c,v 1.7 2005/08/08 19:50:23 abe Exp $";
+#endif
+
+#if defined(HAS_AFS)
+
+# if defined(HPUXKERNBITS) && HPUXKERNBITS>=64
+#define _INO_T
+typedef int ino_t;
+#define _TIME_T
+typedef int time_t;
+# endif /* defined(HPUXKERNBITS) && HPUXKERNBITS>=64 */
+
+#include "lsof.h"
+#include <afs/stds.h>
+#include <afs/param.h>
+#undef __dontcare__
+#include <afs/afsint.h>
+#include <afs/vldbint.h>
+
+
+/*
+ * This is an emulation of the afs_rwlock_t definition that appears in
+ * the AFS sources in afs/lock.h.
+ */
+
+struct afs_lock {
+
+# if HAS_AFS<304
+ unsigned long d1[1];
+# else /* HAS_AFS>=304 */
+ unsigned long d1[6];
+# endif /* HAS_AFS<304 */
+
+};
+typedef struct afs_lock afs_lock_t;
+typedef struct afs_lock afs_rwlock_t;
+
+#define KERNEL
+#include <afs/afs.h>
+#undef KERNEL
+
+
+/*
+ * Local function prototypes
+ */
+
+_PROTOTYPE(static struct volume *getvolume,(struct VenusFid *f, int *vols));
+_PROTOTYPE(static int is_rootFid,(struct vcache *vc, int *rfid));
+
+
+/*
+ * alloc_vcache() - allocate space for vcache structure
+ */
+
+struct vnode *
+alloc_vcache()
+{
+ return((struct vnode *)malloc(sizeof(struct vcache)));
+}
+
+
+/*
+ * ckAFSsym() - check for missing X_AFS_* symbols in AFS name list file
+ */
+
+void
+ckAFSsym(nl)
+ struct nlist *nl; /* copy of Nl[] when empty */
+{
+ char *path = AFSAPATHDEF;
+ int i;
+
+# if defined(HASAOPT)
+ if (AFSApath)
+ path = AFSApath;
+# endif /* defined(HASAOPT) */
+
+/*
+ * See if the alternate AFS name list file can be read.
+ */
+ if (!is_readable(path, 0)) {
+ if (!Fwarn)
+ (void) fprintf(stderr,
+ "%s: WARNING: can't access AFS name list file: %s\n",
+ Pn, path);
+ return;
+ }
+
+/*
+ * Read the AFS modload symbols and compare its non-zero values with
+ * the non-zero values in Nl[]. Quit if there is any mis-match.
+ */
+ if (nlist(path, nl) < 0)
+ return;
+ for (i = 0; Nl[i].n_name && Nl[i].n_name[0]; i++) {
+ if (!nl[i].n_value || !Nl[i].n_value)
+ continue;
+ if (nl[i].n_value != Nl[i].n_value)
+ return;
+ }
+/*
+ * If any X_AFS_* symbol that doesn't have a value in Nl[] has one from
+ * the AFS modload file, copy its modload value to Nl[].
+ */
+ if (((i = get_Nl_value("arFid", Drive_Nl, NULL)) >= 0)
+ && !Nl[i].n_value && nl[i].n_value)
+ Nl[i].n_value = nl[i].n_value;
+ if (((i = get_Nl_value("avops", Drive_Nl, NULL)) >= 0)
+ && !Nl[i].n_value && nl[i].n_value)
+ Nl[i].n_value = nl[i].n_value;
+ if (((i = get_Nl_value("avol", Drive_Nl, NULL)) >= 0)
+ && !Nl[i].n_value && nl[i].n_value)
+ Nl[i].n_value = nl[i].n_value;
+}
+
+
+/*
+ * getvolume() - get volume structure
+ */
+
+static struct volume *
+getvolume(f, vols)
+ struct VenusFid *f; /* file ID pointer */
+ int *vols; /* afs_volumes status return */
+{
+ int i;
+ static KA_T ka = 0;
+ KA_T kh;
+ static struct volume v;
+ struct volume *vp;
+ static int w = 0;
+
+ if (!ka) {
+ if (get_Nl_value("avol", Drive_Nl, (unsigned long *)&ka) < 0
+ || !ka) {
+ if (!w && !Fwarn) {
+ (void) fprintf(stderr,
+ "%s: WARNING: no afs_volumes kernel address\n", Pn);
+ (void) fprintf(stderr,
+ " This may hamper AFS node number reporting.\n");
+ w = 1;
+ }
+ *vols = 0;
+ return((struct volume *)NULL);
+ }
+ }
+ *vols = 1;
+ i = (NVOLS - 1) & f->Fid.Volume;
+ kh = (KA_T)((char *)ka + (i * sizeof(struct volume *)));
+ if (kread(kh, (char *)&vp, sizeof(vp)))
+ return((struct volume *)NULL);
+ while (vp) {
+ if (kread((KA_T)vp, (char *)&v, sizeof(v)))
+ return((struct volume *)NULL);
+ if (v.volume == f->Fid.Volume && v.cell == f->Cell)
+ return(&v);
+ vp = v.next;
+ }
+ return((struct volume *)NULL);
+}
+
+
+/*
+ * hasAFS() - test for AFS presence via vfs structure
+ */
+
+int
+hasAFS(vp)
+ struct vnode *vp; /* vnode pointer */
+{
+ struct vfs v;
+/*
+ * If this vnode has a v_data pointer, then it probably isn't an AFS vnode;
+ * return FALSE.
+ *
+ * If the vfs struct address of /afs is known and this vnode's v_vfsp matches
+ * it, return TRUE.
+ *
+ * Read this vnode's vfs structure and its mount structure. See if the file
+ * system name is AFS. If it isn't, return FALSE. If it is, save the vnode's
+ * v_vfsp as AFSVfsp and return TRUE.
+ */
+ if (AFSVfsp && !vp->v_data && vp->v_vfsp == AFSVfsp)
+ return(1);
+ if (vp->v_data
+ || !vp->v_vfsp
+ || kread((KA_T)vp->v_vfsp, (char *)&v, sizeof(v))
+ || v.vfs_data
+ || strcmp(v.vfs_name, "AFS") != 0)
+ return(0);
+ AFSVfsp = vp->v_vfsp;
+ return(1);
+}
+
+
+/*
+ * is_rootFid() - is the file ID the root file ID
+ *
+ * return: 0 = is not root file ID
+ * 1 = is root file ID
+ * rfid = 0 if root file ID structure address not available
+ * 1 if root file ID structure address available
+ */
+
+static int
+is_rootFid(vc, rfid)
+ struct vcache *vc; /* vcache structure */
+ int *rfid; /* root file ID pointer status return */
+{
+ char *err;
+ static int f = 0; /* rootFID structure status:
+ * -1 = unavailable
+ * 0 = not yet accessed
+ * 1 = available */
+ static struct VenusFid r;
+ unsigned long v;
+ static int w = 0;
+
+ switch (f) {
+ case -1:
+ if (vc->v.v_flag & VROOT) {
+ *rfid = 1;
+ return(1);
+ }
+ *rfid = 0;
+ return(0);
+ case 0:
+ if (get_Nl_value("arFid", Drive_Nl, &v) < 0 || !v) {
+ err = "no kernel address";
+
+rfid_unavailable:
+
+ if (!w && !Fwarn) {
+ (void) fprintf(stderr,
+ "%s: WARNING: AFS root Fid: %s\n", Pn, err);
+ (void) fprintf(stderr,
+ " This may hamper AFS node number reporting.\n");
+ w = 1;
+ }
+ f = -1;
+ if (vc->v.v_flag & VROOT) {
+ *rfid = 1;
+ return(1);
+ }
+ *rfid = 0;
+ return(0);
+ }
+ if (kread((KA_T)v, (char *)&r, sizeof(r))) {
+ err = "can't read from kernel";
+ goto rfid_unavailable;
+ }
+ f = 1;
+ /* fall through */
+ case 1:
+ *rfid = 1;
+ if (vc->fid.Fid.Unique == r.Fid.Unique
+ && vc->fid.Fid.Vnode == r.Fid.Vnode
+ && vc->fid.Fid.Volume == r.Fid.Volume
+ && vc->fid.Cell == r.Cell)
+ return(1);
+ }
+ *rfid = 0;
+ return(0);
+}
+
+
+/*
+ * readafsnode() - read AFS node
+ */
+
+int
+readafsnode(va, v, an)
+ KA_T va; /* kernel vnode address */
+ struct vnode *v; /* vnode buffer pointer */
+ struct afsnode *an; /* afsnode recipient */
+{
+ char *cp, tbuf[32];
+ KA_T ka;
+ int len, rfid, vols;
+ struct vcache *vc;
+ struct volume *vp;
+
+ cp = ((char *)v + sizeof(struct vnode));
+ ka = (KA_T)((char *)va + sizeof(struct vnode));
+ len = sizeof(struct vcache) - sizeof(struct vnode);
+ if (kread(ka, cp, len)) {
+ (void) snpf(Namech, Namechl,
+ "vnode at %s: can't read vcache remainder from %s",
+ print_kptr(va, tbuf, sizeof(tbuf)),
+ print_kptr((KA_T)ka, (char *)NULL, 0));
+ enter_nm(Namech);
+ return(1);
+ }
+ vc = (struct vcache *)v;
+ an->dev = AFSDEV;
+ an->size = (unsigned long)vc->m.Length;
+ an->nlink = (long)vc->m.LinkCount;
+ an->nlink_st = 1;
+/*
+ * Manufacture the "inode" number.
+ */
+ if (vc->mvstat == 2) {
+ if ((vp = getvolume(&vc->fid, &vols))) {
+ an->inode = (INODETYPE)(vp->mtpoint.Fid.Vnode +
+ (vp->mtpoint.Fid.Volume << 16));
+ if (an->inode == (INODETYPE)0) {
+ if (is_rootFid(vc, &rfid))
+ an->ino_st = 1;
+ else if (rfid) {
+ an->inode = (INODETYPE)2;
+ an->ino_st = 1;
+ } else
+ an->ino_st = 0;
+ } else
+ an->ino_st = 1;
+ } else {
+ if (vols) {
+ an->inode = (INODETYPE)2;
+ an->ino_st = 1;
+ } else {
+ if (v->v_flag & VROOT) {
+ an->inode = (INODETYPE)0;
+ an->ino_st = 1;
+ } else
+ an->ino_st = 0;
+ }
+ }
+ } else {
+ an->inode = (INODETYPE)((vc->fid.Fid.Vnode
+ + (vc->fid.Fid.Volume << 16))
+ & 0x7fffffff);
+ an->ino_st = 1;
+ }
+ return(0);
+}
+#endif /* defined(HAS_AFS) */
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-28 16:18:06 +0000