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/* AFS Volume Location Service client
*
* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/sched.h>
#include "afs_fs.h"
#include "internal.h"
/*
* deliver reply data to a VL.GetEntryByXXX call
*/
static int afs_deliver_vl_get_entry_by_xxx(struct afs_call *call)
{
struct afs_cache_vlocation *entry;
__be32 *bp;
u32 tmp;
int loop, ret;
_enter("");
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
entry = call->reply;
bp = call->buffer;
for (loop = 0; loop < 64; loop++)
entry->name[loop] = ntohl(*bp++);
entry->name[loop] = 0;
bp++; /* final NUL */
bp++; /* type */
entry->nservers = ntohl(*bp++);
for (loop = 0; loop < 8; loop++) {
entry->servers[loop].srx_family = AF_RXRPC;
entry->servers[loop].srx_service = FS_SERVICE;
entry->servers[loop].transport_type = SOCK_DGRAM;
entry->servers[loop].transport_len = sizeof(entry->servers[loop].transport.sin6);
entry->servers[loop].transport.sin6.sin6_family = AF_INET6;
entry->servers[loop].transport.sin6.sin6_port = htons(AFS_FS_PORT);
entry->servers[loop].transport.sin6.sin6_flowinfo = 0;
entry->servers[loop].transport.sin6.sin6_scope_id = 0;
entry->servers[loop].transport.sin6.sin6_addr.s6_addr32[0] = 0;
entry->servers[loop].transport.sin6.sin6_addr.s6_addr32[1] = 0;
entry->servers[loop].transport.sin6.sin6_addr.s6_addr32[2] = htonl(0xffff);
entry->servers[loop].transport.sin6.sin6_addr.s6_addr32[3] = *bp++;
}
bp += 8; /* partition IDs */
for (loop = 0; loop < 8; loop++) {
tmp = ntohl(*bp++);
entry->srvtmask[loop] = 0;
if (tmp & AFS_VLSF_RWVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLSF_ROVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLSF_BACKVOL)
entry->srvtmask[loop] |= AFS_VOL_VTM_BAK;
}
entry->vid[0] = ntohl(*bp++);
entry->vid[1] = ntohl(*bp++);
entry->vid[2] = ntohl(*bp++);
bp++; /* clone ID */
tmp = ntohl(*bp++); /* flags */
entry->vidmask = 0;
if (tmp & AFS_VLF_RWEXISTS)
entry->vidmask |= AFS_VOL_VTM_RW;
if (tmp & AFS_VLF_ROEXISTS)
entry->vidmask |= AFS_VOL_VTM_RO;
if (tmp & AFS_VLF_BACKEXISTS)
entry->vidmask |= AFS_VOL_VTM_BAK;
if (!entry->vidmask)
return -EBADMSG;
_leave(" = 0 [done]");
return 0;
}
/*
* VL.GetEntryByName operation type
*/
static const struct afs_call_type afs_RXVLGetEntryByName = {
.name = "VL.GetEntryByName",
.deliver = afs_deliver_vl_get_entry_by_xxx,
.destructor = afs_flat_call_destructor,
};
/*
* VL.GetEntryById operation type
*/
static const struct afs_call_type afs_RXVLGetEntryById = {
.name = "VL.GetEntryById",
.deliver = afs_deliver_vl_get_entry_by_xxx,
.destructor = afs_flat_call_destructor,
};
/*
* dispatch a get volume entry by name operation
*/
int afs_vl_get_entry_by_name(struct afs_net *net,
struct sockaddr_rxrpc *addr,
struct key *key,
const char *volname,
struct afs_cache_vlocation *entry,
bool async)
{
struct afs_call *call;
size_t volnamesz, reqsz, padsz;
__be32 *bp;
_enter("");
volnamesz = strlen(volname);
padsz = (4 - (volnamesz & 3)) & 3;
reqsz = 8 + volnamesz + padsz;
call = afs_alloc_flat_call(net, &afs_RXVLGetEntryByName, reqsz, 384);
if (!call)
return -ENOMEM;
call->key = key;
call->reply = entry;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(VLGETENTRYBYNAME);
*bp++ = htonl(volnamesz);
memcpy(bp, volname, volnamesz);
if (padsz > 0)
memset((void *) bp + volnamesz, 0, padsz);
/* initiate the call */
return afs_make_call(addr, call, GFP_KERNEL, async);
}
/*
* dispatch a get volume entry by ID operation
*/
int afs_vl_get_entry_by_id(struct afs_net *net,
struct sockaddr_rxrpc *addr,
struct key *key,
afs_volid_t volid,
afs_voltype_t voltype,
struct afs_cache_vlocation *entry,
bool async)
{
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(net, &afs_RXVLGetEntryById, 12, 384);
if (!call)
return -ENOMEM;
call->key = key;
call->reply = entry;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(VLGETENTRYBYID);
*bp++ = htonl(volid);
*bp = htonl(voltype);
/* initiate the call */
return afs_make_call(addr, call, GFP_KERNEL, async);
}
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