Пример #1
0
/**
 *   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;
}
Пример #2
0
/*!
 * Return number of the primary cell.
 * \return
 *    Cell number, or 0 if primary cell not found
 */
afs_int32
afs_GetPrimaryCellNum(void)
{
    struct cell *cell;
    afs_int32 cellNum = 0;
    cell = afs_GetPrimaryCell(READ_LOCK);
    if (cell) {
	cellNum = cell->cellNum;
	afs_PutCell(cell, READ_LOCK);
    }
    return cellNum;
}
Пример #3
0
int
SRXAFSCB_GetLocalCell(struct rx_call *a_call, char **a_name)
{
    int plen;
    struct cell *tcell;
    char *t_name, *p_name = NULL;

    RX_AFS_GLOCK();
    AFS_STATCNT(SRXAFSCB_GetLocalCell);

    /* Search the list for the primary cell. Cell number 1 is only
     * the primary cell is when no other cell is explicitly marked as
     * the primary cell.  */
    tcell = afs_GetPrimaryCell(READ_LOCK);
    if (tcell)
	p_name = tcell->cellName;
    if (p_name)
	plen = strlen(p_name);
    else
	plen = 0;
    t_name = afs_osi_Alloc(plen + 1);
    if (t_name == NULL) {
	if (tcell)
	    afs_PutCell(tcell, READ_LOCK);
	RX_AFS_GUNLOCK();
	return ENOMEM;
    }

    t_name[plen] = '\0';
    if (p_name)
	memcpy(t_name, p_name, plen);

    RX_AFS_GUNLOCK();

    *a_name = t_name;
    if (tcell)
	afs_PutCell(tcell, READ_LOCK);
    return 0;
}
Пример #4
0
/*!
 * Returns afs_IsPrimaryCell(afs_GetCell(cellnum)).
 * \param cellnum
 * \return
 */
int
afs_IsPrimaryCellNum(afs_int32 cellnum)
{
    struct cell *tc;
    int primary = 0;

    tc = afs_GetCellStale(cellnum, READ_LOCK);
    if (tc) {
	primary = afs_IsPrimaryCell(tc);
	afs_PutCell(tc, READ_LOCK);
    }

    return primary;
}
Пример #5
0
int
SRXAFSCB_GetCellServDB(struct rx_call *a_call, afs_int32 a_index,
		       char **a_name, serverList * a_hosts)
{
    afs_int32 i, j = 0;
    struct cell *tcell;
    char *t_name, *p_name = NULL;

    RX_AFS_GLOCK();
    AFS_STATCNT(SRXAFSCB_GetCellServDB);

    tcell = afs_GetCellByIndex(a_index, READ_LOCK);

    if (!tcell) {
	i = 0;
	a_hosts->serverList_val = 0;
	a_hosts->serverList_len = 0;
    } else {
	p_name = tcell->cellName;
	for (j = 0; j < AFSMAXCELLHOSTS && tcell->cellHosts[j]; j++);
	i = strlen(p_name);
	a_hosts->serverList_val = afs_osi_Alloc(j * sizeof(afs_int32));
	osi_Assert(a_hosts->serverList_val != NULL);
	a_hosts->serverList_len = j;
	for (j = 0; j < AFSMAXCELLHOSTS && tcell->cellHosts[j]; j++)
	    a_hosts->serverList_val[j] =
		ntohl(tcell->cellHosts[j]->addr->sa_ip);
	afs_PutCell(tcell, READ_LOCK);
    }

    t_name = afs_osi_Alloc(i + 1);
    if (t_name == NULL) {
	afs_osi_Free(a_hosts->serverList_val, (j * sizeof(afs_int32)));
	RX_AFS_GUNLOCK();
	return ENOMEM;
    }

    t_name[i] = '\0';
    if (p_name)
	memcpy(t_name, p_name, i);

    RX_AFS_GUNLOCK();

    *a_name = t_name;
    return 0;
}
Пример #6
0
/*!
 * Check if the given name exists as a cell or alias. Does not lock afs_xcell.
 * \param aname
 * \return
 */
static int
afs_CellOrAliasExists_nl(char *aname)
{
    struct cell *c;
    struct cell_alias *ca;

    c = afs_FindCellByName_nl(aname, READ_LOCK);
    if (c) {
	afs_PutCell(c, READ_LOCK);
	return 1;
    }

    ca = afs_FindCellAlias(aname);
    if (ca) {
	afs_PutCellAlias(ca);
	return 1;
    }

    return 0;
}
Пример #7
0
/*
 * Set up a cell for dynroot if it's not there yet.
 */
static int
afs_dynrootCellInit(void)
{
    if (!afs_dynrootCell) {
	afs_int32 cellHosts[AFS_MAXCELLHOSTS];
	struct cell *tc;
	int code;

	memset(cellHosts, 0, sizeof(cellHosts));
	code =
	    afs_NewCell(AFS_DYNROOT_CELLNAME, cellHosts, CNoSUID | CNoAFSDB,
			NULL, 0, 0, 0);
	if (code)
	    return code;
	tc = afs_GetCellByName(AFS_DYNROOT_CELLNAME, READ_LOCK);
	if (!tc)
	    return ENODEV;
	afs_dynrootCell = tc->cellNum;
	afs_PutCell(tc, READ_LOCK);
    }

    return 0;
}
Пример #8
0
int
SRXAFSCB_GetCellByNum(struct rx_call *a_call, afs_int32 a_cellnum,
		      char **a_name, serverList * a_hosts)
{
    afs_int32 i, sn;
    struct cell *tcell;

    RX_AFS_GLOCK();
    AFS_STATCNT(SRXAFSCB_GetCellByNum);

    a_hosts->serverList_val = 0;
    a_hosts->serverList_len = 0;

    tcell = afs_GetCellStale(a_cellnum, READ_LOCK);
    if (!tcell) {
	*a_name = afs_strdup("");
	RX_AFS_GUNLOCK();
	return 0;
    }

    ObtainReadLock(&tcell->lock);
    *a_name = afs_strdup(tcell->cellName);

    for (sn = 0; sn < AFSMAXCELLHOSTS && tcell->cellHosts[sn]; sn++);
    a_hosts->serverList_len = sn;
    a_hosts->serverList_val = afs_osi_Alloc(sn * sizeof(afs_int32));
    osi_Assert(a_hosts->serverList_val != NULL);

    for (i = 0; i < sn; i++)
	a_hosts->serverList_val[i] = ntohl(tcell->cellHosts[i]->addr->sa_ip);
    ReleaseReadLock(&tcell->lock);
    afs_PutCell(tcell, READ_LOCK);

    RX_AFS_GUNLOCK();
    return 0;
}
Пример #9
0
/**
 * @param aname Volume name.
 * @param acell Cell id.
 * @param agood
 * @param areq Request type.
 * @param locktype Type of lock to be used.
 * @return Volume or NULL if failure.
 */
static struct volume *
afs_NewVolumeByName(char *aname, afs_int32 acell, int agood,
		    struct vrequest *areq, afs_int32 locktype)
{
    afs_int32 code, type = 0;
    struct volume *tv, *tv1;
    struct vldbentry *tve;
    struct nvldbentry *ntve;
    struct uvldbentry *utve;
    struct cell *tcell;
    char *tbuffer, *ve;
    struct afs_conn *tconn;
    struct vrequest treq;
    struct rx_connection *rxconn;

    if (strlen(aname) > VL_MAXNAMELEN)	/* Invalid volume name */
	return NULL;

    tcell = afs_GetCell(acell, READ_LOCK);
    if (!tcell) {
	return NULL;
    }

    /* allow null request if we don't care about ENODEV/ETIMEDOUT distinction */
    if (!areq)
	areq = &treq;


    afs_Trace2(afs_iclSetp, CM_TRACE_GETVOL, ICL_TYPE_STRING, aname,
	       ICL_TYPE_POINTER, aname);
    tbuffer = osi_AllocLargeSpace(AFS_LRALLOCSIZ);
    tve = (struct vldbentry *)(tbuffer + 1024);
    ntve = (struct nvldbentry *)tve;
    utve = (struct uvldbentry *)tve;
    afs_InitReq(&treq, afs_osi_credp);	/* *must* be unauth for vldb */
    do {
	tconn =
	    afs_ConnByMHosts(tcell->cellHosts, tcell->vlport, tcell->cellNum,
			     &treq, SHARED_LOCK, 0, &rxconn);
	if (tconn) {
	    if (tconn->srvr->server->flags & SNO_LHOSTS) {
		type = 0;
		RX_AFS_GUNLOCK();
		code = VL_GetEntryByNameO(rxconn, aname, tve);
		RX_AFS_GLOCK();
	    } else if (tconn->srvr->server->flags & SYES_LHOSTS) {
		type = 1;
		RX_AFS_GUNLOCK();
		code = VL_GetEntryByNameN(rxconn, aname, ntve);
		RX_AFS_GLOCK();
	    } else {
		type = 2;
		RX_AFS_GUNLOCK();
		code = VL_GetEntryByNameU(rxconn, aname, utve);
		RX_AFS_GLOCK();
		if (!(tconn->srvr->server->flags & SVLSRV_UUID)) {
		    if (code == RXGEN_OPCODE) {
			type = 1;
			RX_AFS_GUNLOCK();
			code = VL_GetEntryByNameN(rxconn, aname, ntve);
			RX_AFS_GLOCK();
			if (code == RXGEN_OPCODE) {
			    type = 0;
			    tconn->srvr->server->flags |= SNO_LHOSTS;
			    RX_AFS_GUNLOCK();
			    code = VL_GetEntryByNameO(rxconn, aname, tve);
			    RX_AFS_GLOCK();
			} else if (!code)
			    tconn->srvr->server->flags |= SYES_LHOSTS;
		    } else if (!code)
			tconn->srvr->server->flags |= SVLSRV_UUID;
		}
		lastnvcode = code;
	    }
	} else
	    code = -1;
    } while (afs_Analyze(tconn, rxconn, code, NULL, &treq, -1,	/* no op code for this */
			 SHARED_LOCK, tcell));

    if (code) {
	/* If the client has yet to contact this cell and contact failed due
	 * to network errors, mark the VLDB servers as back up.
	 * That the client tried and failed can be determined from the
	 * fact that there was a downtime incident, but CHasVolRef is not set.
	 */
    /* RT 48959 - unclear if this should really go */
#if 0
	if (areq->networkError && !(tcell->states & CHasVolRef)) {
	    int i;
	    struct server *sp;
	    struct srvAddr *sap;
	    for (i = 0; i < AFS_MAXCELLHOSTS; i++) {
		if ((sp = tcell->cellHosts[i]) == NULL)
		    break;
		for (sap = sp->addr; sap; sap = sap->next_sa)
		    afs_MarkServerUpOrDown(sap, 0);
	    }
	}
#endif
	afs_CopyError(&treq, areq);
	osi_FreeLargeSpace(tbuffer);
	afs_PutCell(tcell, READ_LOCK);
	return NULL;
    }
    /*
     * Check to see if this cell has not yet referenced a volume.  If
     * it hasn't, it's just about to change its status, and we need to mark
     * this fact down. Note that it is remotely possible that afs_SetupVolume
     * could fail and we would still not have a volume reference.
     */
    if (!(tcell->states & CHasVolRef)) {
	tcell->states |= CHasVolRef;
	afs_stats_cmperf.numCellsContacted++;
    }
    /*First time a volume in this cell has been referenced */
    if (type == 2)
	ve = (char *)utve;
    else if (type == 1)
	ve = (char *)ntve;
    else
	ve = (char *)tve;
    tv = afs_SetupVolume(0, aname, ve, tcell, agood, type, &treq);
    if ((agood == 3) && tv && tv->backVol) {
	/*
	 * This means that very soon we'll ask for the BK volume so
	 * we'll prefetch it (well we did already.)
	 */
	tv1 =
	    afs_SetupVolume(tv->backVol, (char *)0, ve, tcell, 0, type, &treq);
	if (tv1) {
	    tv1->refCount--;
	}
    }
    if ((agood >= 2) && tv && tv->roVol) {
	/*
	 * This means that very soon we'll ask for the RO volume so
	 * we'll prefetch it (well we did already.)
	 */
	tv1 = afs_SetupVolume(tv->roVol, NULL, ve, tcell, 0, type, &treq);
	if (tv1) {
	    tv1->refCount--;
	}
    }
    osi_FreeLargeSpace(tbuffer);
    afs_PutCell(tcell, READ_LOCK);
    return tv;

}				/*afs_NewVolumeByName */
Пример #10
0
/*
 * Regenerates the dynroot contents from the current list of
 * cells.  Useful when the list of cells has changed due to
 * an AFSDB lookup, for instance.
 */
static void
afs_RebuildDynroot(void)
{
    int cellidx, maxcellidx, i;
    int aliasidx, maxaliasidx;
    struct cell *c;
    struct cell_alias *ca;
    int curChunk, curPage;
    int dirSize, dotLen;
    char *newDir, *dotCell;
    struct DirHeader *dirHeader;
    int linkCount = 0;
    struct afs_dynSymlink *ts;
    int newVersion;

    ObtainReadLock(&afs_dynrootDirLock);
    newVersion = afs_dynrootVersion;
    ReleaseReadLock(&afs_dynrootDirLock);

    /*
     * Compute the amount of space we need for the fake dir
     */
    curChunk = 13;
    curPage = 0;

    /* Reserve space for "." and ".." */
    curChunk += 2;

    /* Reserve space for the dynamic-mount directory */
    afs_dynroot_computeDirEnt(AFS_DYNROOT_MOUNTNAME, &curPage, &curChunk);

    for (cellidx = 0;; cellidx++) {
	c = afs_GetCellByIndex(cellidx, READ_LOCK);
	if (!c)
	    break;
	if (c->cellNum == afs_dynrootCell)
	    continue;

	dotLen = strlen(c->cellName) + 2;
	dotCell = afs_osi_Alloc(dotLen);
	strcpy(dotCell, ".");
	afs_strcat(dotCell, c->cellName);

	afs_dynroot_computeDirEnt(c->cellName, &curPage, &curChunk);
	afs_dynroot_computeDirEnt(dotCell, &curPage, &curChunk);

	afs_osi_Free(dotCell, dotLen);
	afs_PutCell(c, READ_LOCK);
    }
    maxcellidx = cellidx;

    for (aliasidx = 0;; aliasidx++) {
	ca = afs_GetCellAlias(aliasidx);
	if (!ca)
	    break;

	dotLen = strlen(ca->alias) + 2;
	dotCell = afs_osi_Alloc(dotLen);
	strcpy(dotCell, ".");
	afs_strcat(dotCell, ca->alias);

	afs_dynroot_computeDirEnt(ca->alias, &curPage, &curChunk);
	afs_dynroot_computeDirEnt(dotCell, &curPage, &curChunk);

	afs_osi_Free(dotCell, dotLen);
	afs_PutCellAlias(ca);
    }
    maxaliasidx = aliasidx;

    ObtainReadLock(&afs_dynSymlinkLock);
    ts = afs_dynSymlinkBase;
    while (ts) {
	afs_dynroot_computeDirEnt(ts->name, &curPage, &curChunk);
	ts = ts->next;
    }

    dirSize = (curPage + 1) * AFS_PAGESIZE;
    newDir = afs_osi_Alloc(dirSize);

    /*
     * Now actually construct the directory.
     */
    curChunk = 13;
    curPage = 0;
    dirHeader = (struct DirHeader *)newDir;

    dirHeader->header.pgcount = 0;
    dirHeader->header.tag = htons(1234);
    dirHeader->header.freecount = 0;

    dirHeader->header.freebitmap[0] = 0xff;
    dirHeader->header.freebitmap[1] = 0x1f;
    for (i = 2; i < EPP / 8; i++)
	dirHeader->header.freebitmap[i] = 0;
    dirHeader->alloMap[0] = EPP - DHE - 1;
    for (i = 1; i < MAXPAGES; i++)
	dirHeader->alloMap[i] = EPP;
    for (i = 0; i < NHASHENT; i++)
	dirHeader->hashTable[i] = 0;

    /* Install ".", "..", and the dynamic mount directory */
    afs_dynroot_addDirEnt(dirHeader, &curPage, &curChunk, ".", 1);
    afs_dynroot_addDirEnt(dirHeader, &curPage, &curChunk, "..", 1);
    afs_dynroot_addDirEnt(dirHeader, &curPage, &curChunk,
			  AFS_DYNROOT_MOUNTNAME, AFS_DYNROOT_MOUNT_VNODE);
    linkCount += 3;

    for (cellidx = 0; cellidx < maxcellidx; cellidx++) {
	c = afs_GetCellByIndex(cellidx, READ_LOCK);
	if (!c)
	    continue;
	if (c->cellNum == afs_dynrootCell)
	    continue;

	dotLen = strlen(c->cellName) + 2;
	dotCell = afs_osi_Alloc(dotLen);
	strcpy(dotCell, ".");
	afs_strcat(dotCell, c->cellName);
	afs_dynroot_addDirEnt(dirHeader, &curPage, &curChunk, c->cellName,
			      VNUM_FROM_CIDX_RW(cellidx, 0));
	afs_dynroot_addDirEnt(dirHeader, &curPage, &curChunk, dotCell,
			      VNUM_FROM_CIDX_RW(cellidx, 1));
	afs_osi_Free(dotCell, dotLen);

	linkCount += 2;
	afs_PutCell(c, READ_LOCK);
    }

    for (aliasidx = 0; aliasidx < maxaliasidx; aliasidx++) {
	ca = afs_GetCellAlias(aliasidx);
	if (!ca)
	    continue;

	dotLen = strlen(ca->alias) + 2;
	dotCell = afs_osi_Alloc(dotLen);
	strcpy(dotCell, ".");
	afs_strcat(dotCell, ca->alias);
	afs_dynroot_addDirEnt(dirHeader, &curPage, &curChunk, ca->alias,
			      VNUM_FROM_CAIDX_RW(aliasidx, 0));
	afs_dynroot_addDirEnt(dirHeader, &curPage, &curChunk, dotCell,
			      VNUM_FROM_CAIDX_RW(aliasidx, 1));
	afs_osi_Free(dotCell, dotLen);
	afs_PutCellAlias(ca);
    }

    ts = afs_dynSymlinkBase;
    while (ts) {
	int vnum = VNUM_FROM_TYPEID(VN_TYPE_SYMLINK, ts->index);
	afs_dynroot_addDirEnt(dirHeader, &curPage, &curChunk, ts->name, vnum);
	ts = ts->next;
    }

    ReleaseReadLock(&afs_dynSymlinkLock);

    ObtainWriteLock(&afs_dynrootDirLock, 549);
    if (afs_dynrootDir)
	afs_osi_Free(afs_dynrootDir, afs_dynrootDirLen);
    afs_dynrootDir = newDir;
    afs_dynrootDirLen = dirSize;
    afs_dynrootDirLinkcnt = linkCount;
    afs_dynrootDirVersion = newVersion;
    ReleaseWriteLock(&afs_dynrootDirLock);
}
Пример #11
0
/*
 * 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;
}
Пример #12
0
int
afs_CheckRootVolume(void)
{
    char rootVolName[32];
    struct volume *tvp = NULL;
    int usingDynroot = afs_GetDynrootEnable();
    int localcell;

    AFS_STATCNT(afs_CheckRootVolume);
    if (*afs_rootVolumeName == 0) {
	strcpy(rootVolName, "root.afs");
    } else {
	strcpy(rootVolName, afs_rootVolumeName);
    }

    if (usingDynroot) {
	afs_GetDynrootFid(&afs_rootFid);
	tvp = afs_GetVolume(&afs_rootFid, NULL, READ_LOCK);
    } else {
	struct cell *lc = afs_GetPrimaryCell(READ_LOCK);

	if (!lc)
	    return ENOENT;
	localcell = lc->cellNum;
	afs_PutCell(lc, READ_LOCK);
	tvp = afs_GetVolumeByName(rootVolName, localcell, 1, NULL, READ_LOCK);
	if (!tvp) {
	    char buf[128];
	    int len = strlen(rootVolName);

	    if ((len < 9) || strcmp(&rootVolName[len - 9], ".readonly")) {
		strcpy(buf, rootVolName);
		afs_strcat(buf, ".readonly");
		tvp = afs_GetVolumeByName(buf, localcell, 1, NULL, READ_LOCK);
	    }
	}
	if (tvp) {
	    int volid = (tvp->roVol ? tvp->roVol : tvp->volume);
	    afs_rootFid.Cell = localcell;
	    if (afs_rootFid.Fid.Volume && afs_rootFid.Fid.Volume != volid
		&& afs_globalVp) {
		/* If we had a root fid before and it changed location we reset
		 * the afs_globalVp so that it will be reevaluated.
		 * Just decrement the reference count. This only occurs during
		 * initial cell setup and can panic the machine if we set the
		 * count to zero and fs checkv is executed when the current
		 * directory is /afs.
		 */
#ifdef AFS_LINUX20_ENV
		{
		    struct vrequest *treq = NULL;
		    struct vattr vattr;
		    cred_t *credp;
		    struct dentry *dp;
		    struct vcache *vcp;

		    afs_rootFid.Fid.Volume = volid;
		    afs_rootFid.Fid.Vnode = 1;
		    afs_rootFid.Fid.Unique = 1;

		    credp = crref();
		    if (afs_CreateReq(&treq, credp))
			goto out;
		    vcp = afs_GetVCache(&afs_rootFid, treq, NULL, NULL);
		    if (!vcp)
			goto out;
		    afs_getattr(vcp, &vattr, credp);
		    afs_fill_inode(AFSTOV(vcp), &vattr);

		    dp = d_find_alias(AFSTOV(afs_globalVp));

#if defined(AFS_LINUX24_ENV)
#if defined(HAVE_DCACHE_LOCK)
		    spin_lock(&dcache_lock);
#else
		    spin_lock(&AFSTOV(vcp)->i_lock);
#endif
#if defined(AFS_LINUX26_ENV)
		    spin_lock(&dp->d_lock);
#endif
#endif
#if defined(D_ALIAS_IS_HLIST)
		    hlist_del_init(&dp->d_alias);
		    hlist_add_head(&dp->d_alias, &(AFSTOV(vcp)->i_dentry));
#else
		    list_del_init(&dp->d_alias);
		    list_add(&dp->d_alias, &(AFSTOV(vcp)->i_dentry));
#endif
		    dp->d_inode = AFSTOV(vcp);
#if defined(AFS_LINUX24_ENV)
#if defined(AFS_LINUX26_ENV)
		    spin_unlock(&dp->d_lock);
#endif
#if defined(HAVE_DCACHE_LOCK)
		    spin_unlock(&dcache_lock);
#else
		    spin_unlock(&AFSTOV(vcp)->i_lock);
#endif
#endif
		    dput(dp);

		    AFS_FAST_RELE(afs_globalVp);
		    afs_globalVp = vcp;
		out:
		    crfree(credp);
		    afs_DestroyReq(treq);
		}
#else
#ifdef AFS_DARWIN80_ENV
		afs_PutVCache(afs_globalVp);
#else
		AFS_FAST_RELE(afs_globalVp);
#endif
		afs_globalVp = 0;
#endif
	    }
	    afs_rootFid.Fid.Volume = volid;
	    afs_rootFid.Fid.Vnode = 1;
	    afs_rootFid.Fid.Unique = 1;
	}
    }
    if (tvp) {
	afs_initState = 300;	/* won */
	afs_osi_Wakeup(&afs_initState);
	afs_PutVolume(tvp, READ_LOCK);
    }
    if (afs_rootFid.Fid.Volume)
	return 0;
    else
	return ENOENT;
}
Пример #13
0
/*!
 * Create or update a cell entry.
 * \param acellName Name of cell.
 * \param acellHosts Array of hosts that this cell has.
 * \param aflags Cell flags.
 * \param linkedcname
 * \param fsport File server port.
 * \param vlport Volume server port.
 * \param timeout Cell timeout value, 0 means static AFSDB entry.
 * \return
 */
afs_int32
afs_NewCell(char *acellName, afs_int32 * acellHosts, int aflags,
	    char *linkedcname, u_short fsport, u_short vlport, int timeout)
{
    struct cell *tc, *tcl = 0;
    afs_int32 i, newc = 0, code = 0;

    AFS_STATCNT(afs_NewCell);

    ObtainWriteLock(&afs_xcell, 103);

    tc = afs_FindCellByName_nl(acellName, READ_LOCK);
    if (tc) {
	aflags &= ~CNoSUID;
    } else {
	tc = afs_osi_Alloc(sizeof(struct cell));
	osi_Assert(tc != NULL);
	memset(tc, 0, sizeof(*tc));
	tc->cellName = afs_strdup(acellName);
	tc->fsport = AFS_FSPORT;
	tc->vlport = AFS_VLPORT;
	AFS_MD5_String(tc->cellHandle, tc->cellName, strlen(tc->cellName));
	AFS_RWLOCK_INIT(&tc->lock, "cell lock");
	newc = 1;
	aflags |= CNoSUID;
    }
    ObtainWriteLock(&tc->lock, 688);

    /* If the cell we've found has the correct name but no timeout,
     * and we're called with a non-zero timeout, bail out:  never
     * override static configuration entries with AFSDB ones.
     * One exception: if the original cell entry had no servers,
     * it must get servers from AFSDB.
     */
    if (timeout && !tc->timeout && tc->cellHosts[0]) {
	code = EEXIST;		/* This code is checked for in afs_LookupAFSDB */
	goto bad;
    }

    /* we don't want to keep pinging old vlservers which were down,
     * since they don't matter any more.  It's easier to do this than
     * to remove the server from its various hash tables. */
    for (i = 0; i < AFS_MAXCELLHOSTS; i++) {
	if (!tc->cellHosts[i])
	    break;
	tc->cellHosts[i]->flags &= ~SRVR_ISDOWN;
	tc->cellHosts[i]->flags |= SRVR_ISGONE;
    }

    if (fsport)
	tc->fsport = fsport;
    if (vlport)
	tc->vlport = vlport;

    if (aflags & CLinkedCell) {
	if (!linkedcname) {
	    code = EINVAL;
	    goto bad;
	}
	tcl = afs_FindCellByName_nl(linkedcname, READ_LOCK);
	if (!tcl) {
	    code = ENOENT;
	    goto bad;
	}
	if (tcl->lcellp) {	/* XXX Overwriting if one existed before! XXX */
	    tcl->lcellp->lcellp = (struct cell *)0;
	    tcl->lcellp->states &= ~CLinkedCell;
	}
	tc->lcellp = tcl;
	tcl->lcellp = tc;
    }
    tc->states |= aflags;
    tc->timeout = timeout;

    memset(tc->cellHosts, 0, sizeof(tc->cellHosts));
    for (i = 0; i < AFS_MAXCELLHOSTS; i++) {
	/* Get server for each host and link this cell in.*/
	struct server *ts;
	afs_uint32 temp = acellHosts[i];
	if (!temp)
	    break;
	ts = afs_GetServer(&temp, 1, 0, tc->vlport, WRITE_LOCK, NULL, 0);
	ts->cell = tc;
	ts->flags &= ~SRVR_ISGONE;
	/* Set the server as a host of the new cell. */
	tc->cellHosts[i] = ts;
	afs_PutServer(ts, WRITE_LOCK);
    }
    afs_SortServers(tc->cellHosts, AFS_MAXCELLHOSTS);	/* randomize servers */

    /* New cell: Build and add to LRU cell queue. */
    if (newc) {
	struct cell_name *cn;

	cn = afs_cellname_lookup_name(acellName);
	if (!cn)
	    cn = afs_cellname_new(acellName, 0);

	tc->cnamep = cn;
	tc->cellNum = cn->cellnum;
	tc->cellIndex = afs_cellindex++;
	afs_stats_cmperf.numCellsVisible++;
	QAdd(&CellLRU, &tc->lruq);
    }

    ReleaseWriteLock(&tc->lock);
    ReleaseWriteLock(&afs_xcell);
    afs_PutCell(tc, 0);
    if (!(aflags & CHush))
	afs_DynrootInvalidate();
    return 0;

  bad:
    if (newc) {
	afs_osi_FreeStr(tc->cellName);
	afs_osi_Free(tc, sizeof(struct cell));
    }
    ReleaseWriteLock(&tc->lock);
    ReleaseWriteLock(&afs_xcell);
    return code;
}
Пример #14
0
static struct dentry *afs_decode_fh(struct super_block *sb, __u32 *fh,
				    int fh_len, int fh_type,
				    int (*acceptable)(void *, struct dentry *),
				    void *context)
#endif
{
    struct VenusFid fid;
    struct cell *tc;
    struct dentry *result;
#if defined(NEW_EXPORT_OPS)
    __u32 *fh = (__u32 *)fh_fid->raw;
#endif


    switch (fh_type) {
	case AFSFH_VENUSFID:
	    if (fh_len != 4)
		return NULL;
	    fid.Cell       = fh[0];
	    fid.Fid.Volume = fh[1];
	    fid.Fid.Vnode  = fh[2];
	    fid.Fid.Unique = fh[3];
	    break;

	case AFSFH_CELLFID:
	    if (fh_len != 7)
		return NULL;
	    AFS_GLOCK();
	    tc = afs_GetCellByHandle((void *)fh, READ_LOCK);
	    if (!tc) {
		AFS_GUNLOCK();
		return NULL;
	    }
	    fid.Cell       = tc->cellNum;
	    fid.Fid.Volume = fh[4];
	    fid.Fid.Vnode  = fh[5];
	    fid.Fid.Unique = fh[6];
	    afs_PutCell(tc, READ_LOCK);
	    AFS_GUNLOCK();
	    break;

	case AFSFH_NET_VENUSFID:
	    fid.Cell       = ntohl(fh[0]);
	    fid.Fid.Volume = ntohl(fh[1]);
	    fid.Fid.Vnode  = ntohl(fh[2]);
	    fid.Fid.Unique = ntohl(fh[3]);
	    break;

	case AFSFH_NET_CELLFID:
	    if (fh_len != 7)
		return NULL;
	    AFS_GLOCK();
	    tc = afs_GetCellByHandle((void *)fh, READ_LOCK);
	    if (!tc) {
		AFS_GUNLOCK();
		return NULL;
	    }
	    fid.Cell       = tc->cellNum;
	    fid.Fid.Volume = ntohl(fh[4]);
	    fid.Fid.Vnode  = ntohl(fh[5]);
	    fid.Fid.Unique = ntohl(fh[6]);
	    afs_PutCell(tc, READ_LOCK);
	    AFS_GUNLOCK();
	    break;

	case AFSFH_DYN_RO_CELL:
	case AFSFH_DYN_RW_CELL:
	    if (fh_len != 4)
		return NULL;
	    AFS_GLOCK();
	    tc = afs_GetCellByHandle((void *)fh, READ_LOCK);
	    if (!tc) {
		AFS_GUNLOCK();
		return NULL;
	    }
	    afs_GetDynrootFid(&fid);
	    fid.Fid.Vnode  = VNUM_FROM_CIDX_RW(tc->cellIndex, fh_type & 1);
	    fid.Fid.Unique = 1;
	    afs_PutCell(tc, READ_LOCK);
	    AFS_GUNLOCK();
	    break;

	case AFSFH_DYN_RO_LINK:
	case AFSFH_DYN_RW_LINK:
	    if (fh_len != 4)
		return NULL;
	    AFS_GLOCK();
	    tc = afs_GetCellByHandle((void *)fh, READ_LOCK);
	    if (!tc) {
		AFS_GUNLOCK();
		return NULL;
	    }
	    afs_GetDynrootFid(&fid);
	    fid.Fid.Vnode  = VNUM_FROM_CAIDX_RW(tc->cellIndex, fh_type & 1);
	    fid.Fid.Unique = 1;
	    afs_PutCell(tc, READ_LOCK);
	    AFS_GUNLOCK();
	    break;

	case AFSFH_DYN_MOUNT:
	    if (fh_len != 5)
		return NULL;
	    AFS_GLOCK();
	    tc = afs_GetCellByHandle((void *)fh, READ_LOCK);
	    if (!tc) {
		AFS_GUNLOCK();
		return NULL;
	    }
	    afs_GetDynrootFid(&fid);
	    fid.Fid.Vnode  = VNUM_FROM_TYPEID(VN_TYPE_MOUNT,
					      tc->cellIndex << 2);
	    fid.Fid.Unique = ntohl(fh[4]);
	    afs_PutCell(tc, READ_LOCK);
	    AFS_GUNLOCK();
	    break;

	case AFSFH_DYN_SYMLINK:
	    /* XXX parse dynroot symlink filehandle */
	    /* break; */

	default:
	    return NULL;
    }

#if defined(NEW_EXPORT_OPS)
    result = afs_export_get_dentry(sb, &fid);
#else
    result = sb->s_export_op->find_exported_dentry(sb, &fid, 0,
						   acceptable, context);

#endif

#ifdef OSI_EXPORT_DEBUG
    if (!result) {
	printk("afs: decode_fh(0x%08x/%d/%d.%d): no dentry\n",
	       fid.Cell,      fid.Fid.Volume,
	       fid.Fid.Vnode, fid.Fid.Unique);
    } else if (IS_ERR(result)) {
	printk("afs: decode_fh(0x%08x/%d/%d.%d): error %ld\n",
	       fid.Cell,      fid.Fid.Volume,
	       fid.Fid.Vnode, fid.Fid.Unique, PTR_ERR(result));
    }
#endif
    return result;
}
Пример #15
0
static int afs_encode_fh(struct dentry *de, __u32 *fh, int *max_len,
			 int connectable)
{
    struct vcache *tvc;
    struct cell *tc;
    int vntype;

    if (!de->d_inode) /* encode a negative dentry?! */
	return 255;
    if (*max_len < 4)  /* not enough space */
	return 255;

    tvc = VTOAFS(de->d_inode);

#ifdef OSI_EXPORT_DEBUG
    printk("afs: encode_fh(0x%08x/%d/%d.%d)\n",
	   tvc->f.fid.Cell,      tvc->f.fid.Fid.Volume,
	   tvc->f.fid.Fid.Vnode, tvc->f.fid.Fid.Unique);
#endif
    if (afs_IsDynrootAnyFid(&tvc->f.fid)) {
	vntype = VNUM_TO_VNTYPE(tvc->f.fid.Fid.Vnode);
	switch (vntype) {
	    case 0:
		/* encode as a normal filehandle */
		break;

	    case VN_TYPE_MOUNT:
		if (*max_len < 5) {
		    return 255;
		}
		/* fall through */

	    case VN_TYPE_CELL:
	    case VN_TYPE_ALIAS:
		AFS_GLOCK();
		tc = afs_GetCellByIndex(VNUM_TO_CIDX(tvc->f.fid.Fid.Vnode),
					READ_LOCK);
		if (!tc) {
		    AFS_GUNLOCK();
		    return 255;
		}
		memcpy((void *)fh, tc->cellHandle, 16);
		afs_PutCell(tc, READ_LOCK);
		AFS_GUNLOCK();
		if (vntype == VN_TYPE_MOUNT) {
		    fh[4] = htonl(tvc->f.fid.Fid.Unique);
		    *max_len = 5;
		    return AFSFH_DYN_MOUNT;
		}
		*max_len = 4;
		if (vntype == VN_TYPE_CELL) {
		    return AFSFH_DYN_RO_CELL | VNUM_TO_RW(tvc->f.fid.Fid.Vnode);
		} else {
		    return AFSFH_DYN_RO_LINK | VNUM_TO_RW(tvc->f.fid.Fid.Vnode);
		}

	    case VN_TYPE_SYMLINK:
		/* XXX fill in filehandle for dynroot symlink */
		/* XXX return AFSFH_DYN_SYMLINK; */

	    default:
		return 255;
	}
    }

    if (*max_len < 7) {
	/* not big enough for a migratable filehandle */
	/* always encode in network order */
	fh[0] = htonl(tvc->f.fid.Cell);
	fh[1] = htonl(tvc->f.fid.Fid.Volume);
	fh[2] = htonl(tvc->f.fid.Fid.Vnode);
	fh[3] = htonl(tvc->f.fid.Fid.Unique);
	*max_len = 4;
	return AFSFH_NET_VENUSFID;
    }

    AFS_GLOCK();
    tc = afs_GetCell(tvc->f.fid.Cell, READ_LOCK);
    if (!tc) {
	AFS_GUNLOCK();
	return 255;
    }
    memcpy((void *)fh, tc->cellHandle, 16);
    afs_PutCell(tc, READ_LOCK);
    AFS_GUNLOCK();
    /* always encode in network order */
    fh[4] = htonl(tvc->f.fid.Fid.Volume);
    fh[5] = htonl(tvc->f.fid.Fid.Vnode);
    fh[6] = htonl(tvc->f.fid.Fid.Unique);

    *max_len = 7;
    return AFSFH_NET_CELLFID;
}
Пример #16
0
afs_fid(OSI_VC_DECL(avc), struct fid **fidpp)
#endif				/* AFS_AIX41_ENV */
{
    struct SmallFid Sfid;
    long addr[2];
    register struct cell *tcell;
    extern struct vcache *afs_globalVp;
    int SizeOfSmallFid = SIZEOF_SMALLFID;
    int rootvp = 0;
    OSI_VC_CONVERT(avc);

    AFS_STATCNT(afs_fid);

    if (afs_shuttingdown)
	return EIO;

    if (afs_NFSRootOnly && (avc == afs_globalVp))
	rootvp = 1;
    if (!afs_NFSRootOnly || rootvp
#ifdef AFS_AIX41_ENV
	|| USE_SMALLFID(credp)
#endif
	) {
	tcell = afs_GetCell(avc->f.fid.Cell, READ_LOCK);
	Sfid.Volume = avc->f.fid.Fid.Volume;
	Sfid.Vnode = avc->f.fid.Fid.Vnode;
	Sfid.CellAndUnique =
	    ((tcell->cellIndex << 24) + (avc->f.fid.Fid.Unique & 0xffffff));
	afs_PutCell(tcell, READ_LOCK);
	if (avc->f.fid.Fid.Vnode > 0xffff)
	    afs_fid_vnodeoverflow++;
	if (avc->f.fid.Fid.Unique > 0xffffff)
	    afs_fid_uniqueoverflow++;
    } else {
#if defined(AFS_SUN57_64BIT_ENV) || (defined(AFS_SGI61_ENV) && (_MIPS_SZPTR == 64))
	addr[1] = (long)AFS_XLATOR_MAGIC << 48;
#else /* defined(AFS_SGI61_ENV) && (_MIPS_SZPTR == 64) */
	addr[1] = AFS_XLATOR_MAGIC;
	SizeOfSmallFid = sizeof(addr);
#endif /* defined(AFS_SGI61_ENV) && (_MIPS_SZPTR == 64) */
	addr[0] = (long)avc;
#ifndef AFS_AIX41_ENV
	/* No post processing, so don't hold ref count. */
	AFS_FAST_HOLD(avc);
#endif
    }
#if	defined(AFS_AIX_ENV) || defined(AFS_SUN54_ENV)
    /* Use the fid pointer passed to us. */
    fidpp->fid_len = SizeOfSmallFid;

    if (afs_NFSRootOnly) {
	if (rootvp
#ifdef AFS_AIX41_ENV
	    || USE_SMALLFID(credp)
#endif
	    ) {
	    memcpy(fidpp->fid_data, (caddr_t) & Sfid, SizeOfSmallFid);
	} else {
	    memcpy(fidpp->fid_data, (caddr_t) addr, SizeOfSmallFid);
	}
    } else {
	memcpy(fidpp->fid_data, (caddr_t) & Sfid, SizeOfSmallFid);
    }
#else
    /* malloc a fid pointer ourselves. */
    *fidpp = (struct fid *)AFS_KALLOC(SizeOfSmallFid + 2);
    (*fidpp)->fid_len = SizeOfSmallFid;
    if (afs_NFSRootOnly) {
	if (rootvp) {
	    memcpy((*fidpp)->fid_data, (char *)&Sfid, SizeOfSmallFid);
	} else {
	    memcpy((*fidpp)->fid_data, (char *)addr, SizeOfSmallFid);
	}
    } else {
	memcpy((*fidpp)->fid_data, (char *)&Sfid, SizeOfSmallFid);
    }
#endif
    return (0);
}
Пример #17
0
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 */
Пример #18
0
static struct dentry *afs_export_get_parent(struct dentry *child)
{
    struct VenusFid tfid;
    struct vrequest treq;
    struct cell *tcell;
    struct vcache *vcp;
    struct dentry *dp = NULL;
    cred_t *credp;
    afs_uint32 cellidx;
    int code;

    if (!child->d_inode) {
	/* can't find the parent of a negative dentry */
#ifdef OSI_EXPORT_DEBUG
	printk("afs: get_parent(%s): no inode\n",
	       child->d_name.name ? (char *)child->d_name.name : "?");
#endif
	return ERR_PTR(-EIO);
    }

    credp = crref();
    AFS_GLOCK();

    vcp = VTOAFS(child->d_inode);

    if (afs_IsDynrootMount(vcp)) {
	/* the dynmount directory; parent is always the AFS root */
	tfid = afs_globalVp->f.fid;

    } else if (afs_IsDynrootAny(vcp) &&
	       VNUM_TO_VNTYPE(vcp->f.fid.Fid.Vnode) == VN_TYPE_MOUNT) {
	/* a mount point in the dynmount directory */
	afs_GetDynrootMountFid(&tfid);

    } else if (vcp->mvstat == 2) {
	/* volume root */
	ObtainReadLock(&vcp->lock);
	if (vcp->mvid && vcp->mvid->Fid.Volume) {
	    tfid = *vcp->mvid;
	    ReleaseReadLock(&vcp->lock);
	} else {
	    ReleaseReadLock(&vcp->lock);
	    tcell = afs_GetCell(vcp->f.fid.Cell, READ_LOCK);
	    if (!tcell) {
#ifdef OSI_EXPORT_DEBUG
		printk("afs: get_parent(0x%08x/%d/%d.%d): no cell\n",
		       vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
		       vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique);
#endif
		dp = ERR_PTR(-ENOENT);
		goto done;
	    }

	    cellidx = tcell->cellIndex;
	    afs_PutCell(tcell, READ_LOCK);

	    afs_GetDynrootMountFid(&tfid);
	    tfid.Fid.Vnode = VNUM_FROM_TYPEID(VN_TYPE_MOUNT, cellidx << 2);
	    tfid.Fid.Unique = vcp->f.fid.Fid.Volume;
	}

    } else {
	/* any other vnode */
	if (vType(vcp) == VDIR && !vcp->f.parent.vnode && vcp->mvstat != 1) {
	    code = afs_InitReq(&treq, credp);
	    if (code) {
#ifdef OSI_EXPORT_DEBUG
		printk("afs: get_parent(0x%08x/%d/%d.%d): InitReq: %d\n",
		       vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
		       vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique, code);
#endif
		dp = ERR_PTR(-ENOENT);
		goto done;
	    } else {
		code = update_dir_parent(&treq, vcp);
		if (code) {
#ifdef OSI_EXPORT_DEBUG
		    printk("afs: get_parent(0x%08x/%d/%d.%d): update_dir_parent: %d\n",
			   vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
			   vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique, code);
#endif
		    dp = ERR_PTR(-ENOENT);
		    goto done;
		}
	    }
	}

	tfid.Cell       = vcp->f.fid.Cell;
	tfid.Fid.Volume = vcp->f.fid.Fid.Volume;
	tfid.Fid.Vnode  = vcp->f.parent.vnode;
	tfid.Fid.Unique = vcp->f.parent.unique;
    }

#ifdef OSI_EXPORT_DEBUG
    printk("afs: get_parent(0x%08x/%d/%d.%d): => 0x%08x/%d/%d.%d\n",
	   vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
	   vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique,
	   tfid.Cell, tfid.Fid.Volume, tfid.Fid.Vnode, tfid.Fid.Unique);
#endif

    dp = get_dentry_from_fid(credp, &tfid);
    if (!dp) {
#ifdef OSI_EXPORT_DEBUG
	printk("afs: get_parent(0x%08x/%d/%d.%d): no dentry\n",
	       vcp->f.fid.Cell, vcp->f.fid.Fid.Volume,
	       vcp->f.fid.Fid.Vnode, vcp->f.fid.Fid.Unique);
#endif
	dp = ERR_PTR(-ENOENT);
    }

done:
    AFS_GUNLOCK();
    crfree(credp);

    return dp;
}