| /* |
| * dnode1.c - AIX 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: dnode1.c,v 1.10 2005/08/08 19:46:38 abe Exp $"; |
| #endif |
| |
| |
| #if defined(HAS_AFS) |
| #include "lsof.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[4]; |
| # else /* HAS_AFS>=304 */ |
| unsigned char d1[2]; |
| unsigned short d2[3]; |
| struct timeval d3; |
| unsigned int d4[3]; |
| # 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((MALLOC_S)sizeof(struct vcache))); |
| } |
| |
| |
| /* |
| * 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 ((ka = (KA_T)AFSnl[X_AFS_VOL].n_value) == (KA_T)0) { |
| if (!w && !Fwarn) { |
| (void) fprintf(stderr, |
| "%s: WARNING: no kernel address for: %s\n", |
| Pn, AFSnl[X_AFS_VOL]._n._n_name); |
| (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 vmount vm; |
| 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 data. If the gfs type isn't |
| * AFS, return FALSE. If it is, save the vnode's v_vfsp as AFSVfsp and return |
| * TRUE. |
| */ |
| if (AFSVfsp && !vp->v_data && (KA_T)vp->v_vfsp == AFSVfsp) |
| return(1); |
| if (vp->v_data || !vp->v_vfsp) |
| return(0); |
| if (kread((KA_T)vp->v_vfsp, (char *)&v, sizeof(v))) |
| return(0); |
| if (!v.vfs_mdata |
| || kread((KA_T)v.vfs_mdata, (char *)&vm, sizeof(vm))) |
| return(0); |
| if (vm.vmt_gfstype != MNT_AFS) |
| return(0); |
| AFSVfsp = (KA_T)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 entry */ |
| int *rfid; /* root file ID pointer status return */ |
| { |
| int err; |
| static int f = 0; /* rootFID structure status: |
| * -1 = unavailable |
| * 0 = not yet accessed |
| * 1 = available */ |
| static struct VenusFid r; |
| static int w = 0; |
| |
| switch (f) { |
| case -1: |
| if (vc->v.v_flag & V_ROOT) { |
| *rfid = 1; |
| return(1); |
| } |
| *rfid = 0; |
| return(0); |
| case 0: |
| if (!AFSnl[X_AFS_FID].n_value) { |
| err = 1; |
| |
| rfid_unavailable: |
| |
| if (!w && !Fwarn) { |
| (void) fprintf(stderr, |
| "%s: WARNING: %s: %s\n", Pn, |
| err ? "no kernel address" : "can't read from kernel", |
| AFSnl[X_AFS_VOL]._n._n_name); |
| (void) fprintf(stderr, |
| " This may hamper AFS node number reporting.\n"); |
| w = 1; |
| } |
| f = -1; |
| if (vc->v.v_flag & V_ROOT) { |
| *rfid = 1; |
| return(1); |
| } |
| *rfid = 0; |
| return(0); |
| } |
| if (kread((KA_T)AFSnl[X_AFS_FID].n_value, (char *)&r, sizeof(r))) { |
| err = 0; |
| 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, (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)) |
| & 0x7fffffff); |
| 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 & V_ROOT) { |
| 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) */ |
