コード例 #1
0
ファイル: afs_volume.c プロジェクト: gsell/openafs-osd
/**
 *   Init a new dynroot volume.
 * @param Volume FID.
 * @return Volume or NULL if not found.
 */
static struct volume *
afs_NewDynrootVolume(struct VenusFid *fid)
{
    struct cell *tcell;
    struct volume *tv;
    struct vldbentry *tve;
    char *bp, tbuf[CVBS];

    tcell = afs_GetCell(fid->Cell, READ_LOCK);
    if (!tcell)
	return NULL;
    tve = afs_osi_Alloc(sizeof(*tve));
    osi_Assert(tve != NULL);
    if (!(tcell->states & CHasVolRef))
	tcell->states |= CHasVolRef;

    bp = afs_cv2string(&tbuf[CVBS], fid->Fid.Volume);
    memset(tve, 0, sizeof(*tve));
    strcpy(tve->name, "local-dynroot");
    tve->volumeId[ROVOL] = fid->Fid.Volume;
    tve->flags = VLF_ROEXISTS;

    tv = afs_SetupVolume(0, bp, tve, tcell, 0, 0, 0);
    afs_PutCell(tcell, READ_LOCK);
    afs_osi_Free(tve, sizeof(*tve));
    return tv;
}
コード例 #2
0
ファイル: afs_volume.c プロジェクト: gsell/openafs-osd
/**
 *   Note that areq may be null, in which case we don't bother to set any
 * request status information.
 * @param afid Volume FID.
 * @param areq Request type.
 * @param locktype Lock to be used.
 * @return Volume or NULL if no result.
 */
struct volume *
afs_GetVolume(struct VenusFid *afid, struct vrequest *areq,
	      afs_int32 locktype)
{
    struct volume *tv;
    char *bp, tbuf[CVBS];
    AFS_STATCNT(afs_GetVolume);

    tv = afs_FindVolume(afid, locktype);
    if (!tv) {
	/* Do a dynroot check and add dynroot volume if found. */
	if (afs_IsDynrootAnyFid(afid)) {
	    tv = afs_NewDynrootVolume(afid);
	} else {
	    bp = afs_cv2string(&tbuf[CVBS], afid->Fid.Volume);
	    tv = afs_NewVolumeByName(bp, afid->Cell, 0, areq, locktype);
	}
    }
    return tv;
}				/*afs_GetVolume */
コード例 #3
0
ファイル: afs_dynroot.c プロジェクト: stevenjenkins/openafs
/*
 * Inform dynroot that a new vnode is being created.  Return value
 * is non-zero if this vnode is handled by dynroot, in which case
 * FetchStatus will be filled in.
 */
int
afs_DynrootNewVnode(struct vcache *avc, struct AFSFetchStatus *status)
{
    char *bp, tbuf[CVBS];

    if (_afs_IsDynrootFid(&avc->f.fid)) {
	if (!afs_dynrootEnable)
	    return 0;
	afs_GetDynroot(0, 0, status);
	afs_PutDynroot();
	return 1;
    }

    if (afs_IsDynrootMount(avc)) {
	afs_GetDynrootMount(0, 0, status);
	afs_PutDynroot();
	return 1;
    }

    /*
     * Check if this is an entry under /afs, e.g. /afs/cellname.
     */
    if (avc->f.fid.Cell == afs_dynrootCell
	&& avc->f.fid.Fid.Volume == AFS_DYNROOT_VOLUME) {

	struct cell *c;
	struct cell_alias *ca;
	int namelen, linklen, cellidx, rw;

	memset(status, 0, sizeof(struct AFSFetchStatus));

	status->FileType = SymbolicLink;
	status->LinkCount = 1;
	status->DataVersion = 1;
	status->CallerAccess = PRSFS_LOOKUP | PRSFS_READ;
	status->AnonymousAccess = PRSFS_LOOKUP | PRSFS_READ;
	status->ParentVnode = 1;
	status->ParentUnique = 1;

	if (VNUM_TO_VNTYPE(avc->f.fid.Fid.Vnode) == VN_TYPE_SYMLINK) {
	    struct afs_dynSymlink *ts;
	    int index = VNUM_TO_VNID(avc->f.fid.Fid.Vnode);

	    ObtainReadLock(&afs_dynSymlinkLock);
	    ts = afs_dynSymlinkBase;
	    while (ts) {
		if (ts->index == index)
		    break;
		ts = ts->next;
	    }

	    if (ts) {
		linklen = strlen(ts->target);
		avc->linkData = afs_osi_Alloc(linklen + 1);
		strcpy(avc->linkData, ts->target);

		status->Length = linklen;
		status->UnixModeBits = 0755;
	    }
	    ReleaseReadLock(&afs_dynSymlinkLock);

	    return ts ? 1 : 0;
	}

	if (VNUM_TO_VNTYPE(avc->f.fid.Fid.Vnode) != VN_TYPE_CELL
	    && VNUM_TO_VNTYPE(avc->f.fid.Fid.Vnode) != VN_TYPE_ALIAS
	    && VNUM_TO_VNTYPE(avc->f.fid.Fid.Vnode) != VN_TYPE_MOUNT) {
	    afs_warn("dynroot vnode inconsistency, unknown VNTYPE %d\n",
		     VNUM_TO_VNTYPE(avc->f.fid.Fid.Vnode));
	    return 0;
	}

	cellidx = VNUM_TO_CIDX(avc->f.fid.Fid.Vnode);
	rw = VNUM_TO_RW(avc->f.fid.Fid.Vnode);

	if (VNUM_TO_VNTYPE(avc->f.fid.Fid.Vnode) == VN_TYPE_ALIAS) {
	    char *realName;

	    ca = afs_GetCellAlias(cellidx);
	    if (!ca) {
		afs_warn("dynroot vnode inconsistency, can't find alias %d\n",
			 cellidx);
		return 0;
	    }

	    /*
	     * linkData needs to contain the name of the cell
	     * we're aliasing for.
	     */
	    realName = ca->cell;
	    if (!realName) {
		afs_warn("dynroot: alias %s missing real cell name\n",
			 ca->alias);
		avc->linkData = afs_strdup("unknown");
		linklen = 7;
	    } else {
		int namelen = strlen(realName);
		linklen = rw + namelen;
		avc->linkData = afs_osi_Alloc(linklen + 1);
		strcpy(avc->linkData, rw ? "." : "");
		afs_strcat(avc->linkData, realName);
	    }

	    status->UnixModeBits = 0755;
	    afs_PutCellAlias(ca);

	} else if (VNUM_TO_VNTYPE(avc->f.fid.Fid.Vnode) == VN_TYPE_MOUNT) {
	    c = afs_GetCellByIndex(cellidx, READ_LOCK);
	    if (!c) {
		afs_warn("dynroot vnode inconsistency, can't find cell %d\n",
			 cellidx);
		return 0;
	    }

	    /*
	     * linkData needs to contain "%cell:volumeid"
	     */
	    namelen = strlen(c->cellName);
	    bp = afs_cv2string(&tbuf[CVBS], avc->f.fid.Fid.Unique);
	    linklen = 2 + namelen + strlen(bp);
	    avc->linkData = afs_osi_Alloc(linklen + 1);
	    strcpy(avc->linkData, "%");
	    afs_strcat(avc->linkData, c->cellName);
	    afs_strcat(avc->linkData, ":");
	    afs_strcat(avc->linkData, bp);

	    status->UnixModeBits = 0644;
	    status->ParentVnode = AFS_DYNROOT_MOUNT_VNODE;
	    afs_PutCell(c, READ_LOCK);

	} else {
	    c = afs_GetCellByIndex(cellidx, READ_LOCK);
	    if (!c) {
		afs_warn("dynroot vnode inconsistency, can't find cell %d\n",
			 cellidx);
		return 0;
	    }

	    /*
	     * linkData needs to contain "#cell:root.cell" or "%cell:root.cell"
	     */
	    namelen = strlen(c->cellName);
	    linklen = 1 + namelen + 10;
	    avc->linkData = afs_osi_Alloc(linklen + 1);
	    strcpy(avc->linkData, rw ? "%" : "#");
	    afs_strcat(avc->linkData, c->cellName);
	    afs_strcat(avc->linkData, ":root.cell");

	    status->UnixModeBits = 0644;
	    afs_PutCell(c, READ_LOCK);
	}

	status->Length = linklen;
	return 1;
    }

    return 0;
}
コード例 #4
0
ファイル: afs_analyze.c プロジェクト: maxendpoint/openafs_cvs
static int
VLDB_Same(struct VenusFid *afid, struct vrequest *areq)
{
    struct vrequest treq;
    struct afs_conn *tconn;
    int i, type = 0;
    union {
	struct vldbentry tve;
	struct nvldbentry ntve;
	struct uvldbentry utve;
    } *v;
    struct volume *tvp;
    struct cell *tcell;
    char *bp, tbuf[CVBS];	/* biggest volume id is 2^32, ~ 4*10^9 */
    unsigned int changed;
    struct server *(oldhosts[NMAXNSERVERS]);

    AFS_STATCNT(CheckVLDB);
    afs_FinalizeReq(areq);

    if ((i = afs_InitReq(&treq, afs_osi_credp)))
	return DUNNO;
    v = afs_osi_Alloc(sizeof(*v));
    tcell = afs_GetCell(afid->Cell, READ_LOCK);
    bp = afs_cv2string(&tbuf[CVBS], afid->Fid.Volume);
    do {
	VSleep(2);		/* Better safe than sorry. */
	tconn =
	    afs_ConnByMHosts(tcell->cellHosts, tcell->vlport, tcell->cellNum,
			     &treq, SHARED_LOCK);
	if (tconn) {
	    if (tconn->srvr->server->flags & SNO_LHOSTS) {
		type = 0;
		RX_AFS_GUNLOCK();
		i = VL_GetEntryByNameO(tconn->id, bp, &v->tve);
		RX_AFS_GLOCK();
	    } else if (tconn->srvr->server->flags & SYES_LHOSTS) {
		type = 1;
		RX_AFS_GUNLOCK();
		i = VL_GetEntryByNameN(tconn->id, bp, &v->ntve);
		RX_AFS_GLOCK();
	    } else {
		type = 2;
		RX_AFS_GUNLOCK();
		i = VL_GetEntryByNameU(tconn->id, bp, &v->utve);
		RX_AFS_GLOCK();
		if (!(tconn->srvr->server->flags & SVLSRV_UUID)) {
		    if (i == RXGEN_OPCODE) {
			type = 1;
			RX_AFS_GUNLOCK();
			i = VL_GetEntryByNameN(tconn->id, bp, &v->ntve);
			RX_AFS_GLOCK();
			if (i == RXGEN_OPCODE) {
			    type = 0;
			    tconn->srvr->server->flags |= SNO_LHOSTS;
			    RX_AFS_GUNLOCK();
			    i = VL_GetEntryByNameO(tconn->id, bp, &v->tve);
			    RX_AFS_GLOCK();
			} else if (!i)
			    tconn->srvr->server->flags |= SYES_LHOSTS;
		    } else if (!i)
			tconn->srvr->server->flags |= SVLSRV_UUID;
		}
		lastcode = i;
	    }
	} else
	    i = -1;
    } while (afs_Analyze(tconn, i, NULL, &treq, -1,	/* no op code for this */
			 SHARED_LOCK, tcell));

    afs_PutCell(tcell, READ_LOCK);
    afs_Trace2(afs_iclSetp, CM_TRACE_CHECKVLDB, ICL_TYPE_FID, &afid,
	       ICL_TYPE_INT32, i);

    if (i) {
	afs_osi_Free(v, sizeof(*v));
	return DUNNO;
    }
    /* have info, copy into serverHost array */
    changed = 0;
    tvp = afs_FindVolume(afid, WRITE_LOCK);
    if (tvp) {
	ObtainWriteLock(&tvp->lock, 107);
	for (i = 0; i < NMAXNSERVERS && tvp->serverHost[i]; i++) {
	    oldhosts[i] = tvp->serverHost[i];
	}

	if (type == 2) {
	    InstallUVolumeEntry(tvp, &v->utve, afid->Cell, tcell, &treq);
	} else if (type == 1) {
	    InstallNVolumeEntry(tvp, &v->ntve, afid->Cell);
	} else {
	    InstallVolumeEntry(tvp, &v->tve, afid->Cell);
	}

	if (i < NMAXNSERVERS && tvp->serverHost[i]) {
	    changed = 1;
	}
	for (--i; !changed && i >= 0; i--) {
	    if (tvp->serverHost[i] != oldhosts[i]) {
		changed = 1;	/* also happens if prefs change.  big deal. */
	    }
	}

	ReleaseWriteLock(&tvp->lock);
	afs_PutVolume(tvp, WRITE_LOCK);
    } else {			/* can't find volume */
	tvp = afs_GetVolume(afid, &treq, WRITE_LOCK);
	if (tvp) {
	    afs_PutVolume(tvp, WRITE_LOCK);
	    afs_osi_Free(v, sizeof(*v));
	    return DIFFERENT;
	} else {
	    afs_osi_Free(v, sizeof(*v));
	    return DUNNO;
	}
    }

    afs_osi_Free(v, sizeof(*v));
    return (changed ? DIFFERENT : SAME);
}				/*VLDB_Same */