/*!
* Set the primary cell name to the given cell name.
* \param acellName Cell name.
* \return 0 for success, < 0 for error.
*/
afs_int32
afs_SetPrimaryCell(char *acellName)
{
ObtainWriteLock(&afs_xcell, 691);
if (afs_thiscell)
afs_osi_FreeStr(afs_thiscell);
afs_thiscell = afs_strdup(acellName);
ReleaseWriteLock(&afs_xcell);
return 0;
}
/*!
* Look up AFSDB for given cell name and create locally.
* \param acellName Cell name.
*/
void
afs_LookupAFSDB(char *acellName)
{
int code;
char *cellName = afs_strdup(acellName);
code = afs_GetCellHostsAFSDB(cellName);
afs_Trace2(afs_iclSetp, CM_TRACE_AFSDB, ICL_TYPE_STRING, cellName,
ICL_TYPE_INT32, code);
afs_osi_FreeStr(cellName);
}
/*!
* Create new cell alias entry and update dynroot vnode.
* \param alias
* \param cell
* \return
*/
afs_int32
afs_NewCellAlias(char *alias, char *cell)
{
struct cell_alias *tc;
ObtainSharedLock(&afs_xcell, 681);
if (afs_CellOrAliasExists_nl(alias)) {
ReleaseSharedLock(&afs_xcell);
return EEXIST;
}
UpgradeSToWLock(&afs_xcell, 682);
tc = (struct cell_alias *)afs_osi_Alloc(sizeof(struct cell_alias));
tc->alias = afs_strdup(alias);
tc->cell = afs_strdup(cell);
tc->next = afs_cellalias_head;
tc->index = afs_cellalias_index++;
afs_cellalias_head = tc;
ReleaseWriteLock(&afs_xcell);
afs_DynrootInvalidate();
return 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;
}
/*!
* Create a new cell name, optional cell number.
* \param name Name of cell.
* \param cellnum Cellname number.
* \return Initialized structure.
*/
static struct cell_name *
afs_cellname_new(char *name, afs_int32 cellnum)
{
struct cell_name *cn;
if (cellnum == 0)
cellnum = afs_cellnum_next;
cn = (struct cell_name *)afs_osi_Alloc(sizeof(*cn));
cn->next = afs_cellname_head;
cn->cellnum = cellnum;
cn->cellname = afs_strdup(name);
cn->used = 0;
afs_cellname_head = cn;
if (cellnum >= afs_cellnum_next)
afs_cellnum_next = cellnum + 1;
return cn;
}
/*
* 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;
}
/*!
* 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;
}
