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-rw-r--r--fs/afs/vlclient.c358
1 files changed, 250 insertions, 108 deletions
diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c
index c3d9e5a5f67e..3a23c0b08eb6 100644
--- a/fs/afs/vlclient.c
+++ b/fs/afs/vlclient.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* 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>
@@ -22,8 +18,7 @@ static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call)
{
struct afs_uvldbentry__xdr *uvldb;
struct afs_vldb_entry *entry;
- bool new_only = false;
- u32 tmp, nr_servers, vlflags;
+ u32 nr_servers, vlflags;
int i, ret;
_enter("");
@@ -34,7 +29,7 @@ static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call)
/* unmarshall the reply once we've received all of it */
uvldb = call->buffer;
- entry = call->reply[0];
+ entry = call->ret_vldb;
nr_servers = ntohl(uvldb->nServers);
if (nr_servers > AFS_NMAXNSERVERS)
@@ -45,38 +40,26 @@ static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call)
entry->name[i] = 0;
entry->name_len = strlen(entry->name);
- /* If there is a new replication site that we can use, ignore all the
- * sites that aren't marked as new.
- */
- for (i = 0; i < nr_servers; i++) {
- tmp = ntohl(uvldb->serverFlags[i]);
- if (!(tmp & AFS_VLSF_DONTUSE) &&
- (tmp & AFS_VLSF_NEWREPSITE))
- new_only = true;
- }
-
vlflags = ntohl(uvldb->flags);
for (i = 0; i < nr_servers; i++) {
struct afs_uuid__xdr *xdr;
struct afs_uuid *uuid;
+ u32 tmp = ntohl(uvldb->serverFlags[i]);
int j;
+ int n = entry->nr_servers;
- tmp = ntohl(uvldb->serverFlags[i]);
- if (tmp & AFS_VLSF_DONTUSE ||
- (new_only && !(tmp & AFS_VLSF_NEWREPSITE)))
- continue;
if (tmp & AFS_VLSF_RWVOL) {
- entry->fs_mask[i] |= AFS_VOL_VTM_RW;
+ entry->fs_mask[n] |= AFS_VOL_VTM_RW;
if (vlflags & AFS_VLF_BACKEXISTS)
- entry->fs_mask[i] |= AFS_VOL_VTM_BAK;
+ entry->fs_mask[n] |= AFS_VOL_VTM_BAK;
}
if (tmp & AFS_VLSF_ROVOL)
- entry->fs_mask[i] |= AFS_VOL_VTM_RO;
- if (!entry->fs_mask[i])
+ entry->fs_mask[n] |= AFS_VOL_VTM_RO;
+ if (!entry->fs_mask[n])
continue;
xdr = &uvldb->serverNumber[i];
- uuid = (struct afs_uuid *)&entry->fs_server[i];
+ uuid = (struct afs_uuid *)&entry->fs_server[n];
uuid->time_low = xdr->time_low;
uuid->time_mid = htons(ntohl(xdr->time_mid));
uuid->time_hi_and_version = htons(ntohl(xdr->time_hi_and_version));
@@ -85,6 +68,8 @@ static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call)
for (j = 0; j < 6; j++)
uuid->node[j] = (u8)ntohl(xdr->node[j]);
+ entry->vlsf_flags[n] = tmp;
+ entry->addr_version[n] = ntohl(uvldb->serverUnique[i]);
entry->nr_servers++;
}
@@ -108,12 +93,6 @@ static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call)
return 0;
}
-static void afs_destroy_vl_get_entry_by_name_u(struct afs_call *call)
-{
- kfree(call->reply[0]);
- afs_flat_call_destructor(call);
-}
-
/*
* VL.GetEntryByNameU operation type.
*/
@@ -121,7 +100,7 @@ static const struct afs_call_type afs_RXVLGetEntryByNameU = {
.name = "VL.GetEntryByNameU",
.op = afs_VL_GetEntryByNameU,
.deliver = afs_deliver_vl_get_entry_by_name_u,
- .destructor = afs_destroy_vl_get_entry_by_name_u,
+ .destructor = afs_flat_call_destructor,
};
/*
@@ -155,8 +134,10 @@ struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *vc,
}
call->key = vc->key;
- call->reply[0] = entry;
- call->ret_reply0 = true;
+ call->ret_vldb = entry;
+ call->max_lifespan = AFS_VL_MAX_LIFESPAN;
+ call->peer = rxrpc_kernel_get_peer(vc->alist->addrs[vc->addr_index].peer);
+ call->service_id = vc->server->service_id;
/* Marshall the parameters */
bp = call->request;
@@ -167,7 +148,17 @@ struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *vc,
memset((void *)bp + volnamesz, 0, padsz);
trace_afs_make_vl_call(call);
- return (struct afs_vldb_entry *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
+ afs_make_call(call, GFP_KERNEL);
+ afs_wait_for_call_to_complete(call);
+ vc->call_abort_code = call->abort_code;
+ vc->call_error = call->error;
+ vc->call_responded = call->responded;
+ afs_put_call(call);
+ if (vc->call_error) {
+ kfree(entry);
+ return ERR_PTR(vc->call_error);
+ }
+ return entry;
}
/*
@@ -187,7 +178,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
int i, ret;
_enter("{%u,%zu/%u}",
- call->unmarshall, iov_iter_count(call->_iter), call->count);
+ call->unmarshall, iov_iter_count(call->iter), call->count);
switch (call->unmarshall) {
case 0:
@@ -195,7 +186,9 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32));
call->unmarshall++;
- /* Extract the returned uuid, uniquifier, nentries and blkaddrs size */
+ /* Extract the returned uuid, uniquifier, nentries and
+ * blkaddrs size */
+ fallthrough;
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
@@ -207,11 +200,11 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
count = ntohl(*bp);
nentries = min(nentries, count);
- alist = afs_alloc_addrlist(nentries, FS_SERVICE, AFS_FS_PORT);
+ alist = afs_alloc_addrlist(nentries);
if (!alist)
return -ENOMEM;
alist->version = uniquifier;
- call->reply[0] = alist;
+ call->ret_alist = alist;
call->count = count;
call->count2 = nentries;
call->unmarshall++;
@@ -220,18 +213,22 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
count = min(call->count, 4U);
afs_extract_to_buf(call, count * sizeof(__be32));
- /* Extract entries */
+ fallthrough; /* and extract entries */
case 2:
ret = afs_extract_data(call, call->count > 4);
if (ret < 0)
return ret;
- alist = call->reply[0];
+ alist = call->ret_alist;
bp = call->buffer;
count = min(call->count, 4U);
- for (i = 0; i < count; i++)
- if (alist->nr_addrs < call->count2)
- afs_merge_fs_addr4(alist, *bp++, AFS_FS_PORT);
+ for (i = 0; i < count; i++) {
+ if (alist->nr_addrs < call->count2) {
+ ret = afs_merge_fs_addr4(call->net, alist, *bp++, AFS_FS_PORT);
+ if (ret < 0)
+ return ret;
+ }
+ }
call->count -= count;
if (call->count > 0)
@@ -244,13 +241,6 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
return 0;
}
-static void afs_vl_get_addrs_u_destructor(struct afs_call *call)
-{
- afs_put_server(call->net, (struct afs_server *)call->reply[0]);
- kfree(call->reply[1]);
- return afs_flat_call_destructor(call);
-}
-
/*
* VL.GetAddrsU operation type.
*/
@@ -258,7 +248,7 @@ static const struct afs_call_type afs_RXVLGetAddrsU = {
.name = "VL.GetAddrsU",
.op = afs_VL_GetAddrsU,
.deliver = afs_deliver_vl_get_addrs_u,
- .destructor = afs_vl_get_addrs_u_destructor,
+ .destructor = afs_flat_call_destructor,
};
/*
@@ -269,6 +259,7 @@ struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc,
const uuid_t *uuid)
{
struct afs_ListAddrByAttributes__xdr *r;
+ struct afs_addr_list *alist;
const struct afs_uuid *u = (const struct afs_uuid *)uuid;
struct afs_call *call;
struct afs_net *net = vc->cell->net;
@@ -284,8 +275,10 @@ struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc,
return ERR_PTR(-ENOMEM);
call->key = vc->key;
- call->reply[0] = NULL;
- call->ret_reply0 = true;
+ call->ret_alist = NULL;
+ call->max_lifespan = AFS_VL_MAX_LIFESPAN;
+ call->peer = rxrpc_kernel_get_peer(vc->alist->addrs[vc->addr_index].peer);
+ call->service_id = vc->server->service_id;
/* Marshall the parameters */
bp = call->request;
@@ -304,7 +297,18 @@ struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc,
r->uuid.node[i] = htonl(u->node[i]);
trace_afs_make_vl_call(call);
- return (struct afs_addr_list *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
+ afs_make_call(call, GFP_KERNEL);
+ afs_wait_for_call_to_complete(call);
+ vc->call_abort_code = call->abort_code;
+ vc->call_error = call->error;
+ vc->call_responded = call->responded;
+ alist = call->ret_alist;
+ afs_put_call(call);
+ if (vc->call_error) {
+ afs_put_addrlist(alist, afs_alist_trace_put_getaddru);
+ return ERR_PTR(vc->call_error);
+ }
+ return alist;
}
/*
@@ -316,14 +320,14 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
int ret;
_enter("{%u,%zu/%u}",
- call->unmarshall, iov_iter_count(call->_iter), call->count);
+ call->unmarshall, iov_iter_count(call->iter), call->count);
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
- /* Extract the capabilities word count */
+ fallthrough; /* and extract the capabilities word count */
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
@@ -336,7 +340,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
call->unmarshall++;
afs_extract_discard(call, count * sizeof(__be32));
- /* Extract capabilities words */
+ fallthrough; /* and extract capabilities words */
case 2:
ret = afs_extract_data(call, false);
if (ret < 0)
@@ -354,9 +358,8 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
static void afs_destroy_vl_get_capabilities(struct afs_call *call)
{
- struct afs_vlserver *server = call->reply[0];
-
- afs_put_vlserver(call->net, server);
+ afs_put_addrlist(call->vl_probe, afs_alist_trace_put_vlgetcaps);
+ afs_put_vlserver(call->net, call->vlserver);
afs_flat_call_destructor(call);
}
@@ -367,6 +370,7 @@ static const struct afs_call_type afs_RXVLGetCapabilities = {
.name = "VL.GetCapabilities",
.op = afs_VL_GetCapabilities,
.deliver = afs_deliver_vl_get_capabilities,
+ .immediate_cancel = afs_vlserver_probe_result,
.done = afs_vlserver_probe_result,
.destructor = afs_destroy_vl_get_capabilities,
};
@@ -378,12 +382,12 @@ static const struct afs_call_type afs_RXVLGetCapabilities = {
* We use this to probe for service upgrade to determine what the server at the
* other end supports.
*/
-int afs_vl_get_capabilities(struct afs_net *net,
- struct afs_addr_cursor *ac,
- struct key *key,
- struct afs_vlserver *server,
- unsigned int server_index,
- bool async)
+struct afs_call *afs_vl_get_capabilities(struct afs_net *net,
+ struct afs_addr_list *alist,
+ unsigned int addr_index,
+ struct key *key,
+ struct afs_vlserver *server,
+ unsigned int server_index)
{
struct afs_call *call;
__be32 *bp;
@@ -392,13 +396,18 @@ int afs_vl_get_capabilities(struct afs_net *net,
call = afs_alloc_flat_call(net, &afs_RXVLGetCapabilities, 1 * 4, 16 * 4);
if (!call)
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
call->key = key;
- call->reply[0] = afs_get_vlserver(server);
- call->reply[1] = (void *)(long)server_index;
+ call->vlserver = afs_get_vlserver(server);
+ call->server_index = server_index;
+ call->peer = rxrpc_kernel_get_peer(alist->addrs[addr_index].peer);
+ call->vl_probe = afs_get_addrlist(alist, afs_alist_trace_get_vlgetcaps);
+ call->probe_index = addr_index;
+ call->service_id = server->service_id;
call->upgrade = true;
- call->want_reply_time = true;
+ call->async = true;
+ call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
/* marshall the parameters */
bp = call->request;
@@ -406,7 +415,8 @@ int afs_vl_get_capabilities(struct afs_net *net,
/* Can't take a ref on server */
trace_afs_make_vl_call(call);
- return afs_make_call(ac, call, GFP_KERNEL, async);
+ afs_make_call(call, GFP_KERNEL);
+ return call;
}
/*
@@ -426,7 +436,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
int ret;
_enter("{%u,%zu,%u}",
- call->unmarshall, iov_iter_count(call->_iter), call->count2);
+ call->unmarshall, iov_iter_count(call->iter), call->count2);
switch (call->unmarshall) {
case 0:
@@ -436,6 +446,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
/* Extract the returned uuid, uniquifier, fsEndpoints count and
* either the first fsEndpoint type or the volEndpoints
* count if there are no fsEndpoints. */
+ fallthrough;
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
@@ -447,14 +458,13 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
call->count2 = ntohl(*bp); /* Type or next count */
if (call->count > YFS_MAXENDPOINTS)
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_fsendpt_num);
+ return afs_protocol_error(call, afs_eproto_yvl_fsendpt_num);
- alist = afs_alloc_addrlist(call->count, FS_SERVICE, AFS_FS_PORT);
+ alist = afs_alloc_addrlist(call->count);
if (!alist)
return -ENOMEM;
alist->version = uniquifier;
- call->reply[0] = alist;
+ call->ret_alist = alist;
if (call->count == 0)
goto extract_volendpoints;
@@ -468,40 +478,42 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
size = sizeof(__be32) * (1 + 4 + 1);
break;
default:
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_fsendpt_type);
+ return afs_protocol_error(call, afs_eproto_yvl_fsendpt_type);
}
size += sizeof(__be32);
afs_extract_to_buf(call, size);
call->unmarshall = 2;
- /* Extract fsEndpoints[] entries */
+ fallthrough; /* and extract fsEndpoints[] entries */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
- alist = call->reply[0];
+ alist = call->ret_alist;
bp = call->buffer;
switch (call->count2) {
case YFS_ENDPOINT_IPV4:
if (ntohl(bp[0]) != sizeof(__be32) * 2)
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_fsendpt4_len);
- afs_merge_fs_addr4(alist, bp[1], ntohl(bp[2]));
+ return afs_protocol_error(
+ call, afs_eproto_yvl_fsendpt4_len);
+ ret = afs_merge_fs_addr4(call->net, alist, bp[1], ntohl(bp[2]));
+ if (ret < 0)
+ return ret;
bp += 3;
break;
case YFS_ENDPOINT_IPV6:
if (ntohl(bp[0]) != sizeof(__be32) * 5)
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_fsendpt6_len);
- afs_merge_fs_addr6(alist, bp + 1, ntohl(bp[5]));
+ return afs_protocol_error(
+ call, afs_eproto_yvl_fsendpt6_len);
+ ret = afs_merge_fs_addr6(call->net, alist, bp + 1, ntohl(bp[5]));
+ if (ret < 0)
+ return ret;
bp += 6;
break;
default:
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_fsendpt_type);
+ return afs_protocol_error(call, afs_eproto_yvl_fsendpt_type);
}
/* Got either the type of the next entry or the count of
@@ -519,8 +531,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
if (!call->count)
goto end;
if (call->count > YFS_MAXENDPOINTS)
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_vlendpt_type);
+ return afs_protocol_error(call, afs_eproto_yvl_vlendpt_type);
afs_extract_to_buf(call, 1 * sizeof(__be32));
call->unmarshall = 3;
@@ -529,6 +540,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
* extract the type of the next endpoint when we extract the
* data of the current one, but this is the first...
*/
+ fallthrough;
case 3:
ret = afs_extract_data(call, true);
if (ret < 0)
@@ -546,8 +558,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
size = sizeof(__be32) * (1 + 4 + 1);
break;
default:
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_vlendpt_type);
+ return afs_protocol_error(call, afs_eproto_yvl_vlendpt_type);
}
if (call->count > 1)
@@ -555,7 +566,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
afs_extract_to_buf(call, size);
call->unmarshall = 4;
- /* Extract volEndpoints[] entries */
+ fallthrough; /* and extract volEndpoints[] entries */
case 4:
ret = afs_extract_data(call, true);
if (ret < 0)
@@ -565,19 +576,18 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
switch (call->count2) {
case YFS_ENDPOINT_IPV4:
if (ntohl(bp[0]) != sizeof(__be32) * 2)
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_vlendpt4_len);
+ return afs_protocol_error(
+ call, afs_eproto_yvl_vlendpt4_len);
bp += 3;
break;
case YFS_ENDPOINT_IPV6:
if (ntohl(bp[0]) != sizeof(__be32) * 5)
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_vlendpt6_len);
+ return afs_protocol_error(
+ call, afs_eproto_yvl_vlendpt6_len);
bp += 6;
break;
default:
- return afs_protocol_error(call, -EBADMSG,
- afs_eproto_yvl_vlendpt_type);
+ return afs_protocol_error(call, afs_eproto_yvl_vlendpt_type);
}
/* Got either the type of the next entry or the count of
@@ -591,18 +601,18 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
afs_extract_discard(call, 0);
call->unmarshall = 5;
- /* Done */
+ fallthrough; /* Done */
case 5:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
call->unmarshall = 6;
+ fallthrough;
case 6:
break;
}
- alist = call->reply[0];
_leave(" = 0 [done]");
return 0;
}
@@ -614,7 +624,7 @@ static const struct afs_call_type afs_YFSVLGetEndpoints = {
.name = "YFSVL.GetEndpoints",
.op = afs_YFSVL_GetEndpoints,
.deliver = afs_deliver_yfsvl_get_endpoints,
- .destructor = afs_vl_get_addrs_u_destructor,
+ .destructor = afs_flat_call_destructor,
};
/*
@@ -624,6 +634,7 @@ static const struct afs_call_type afs_YFSVLGetEndpoints = {
struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc,
const uuid_t *uuid)
{
+ struct afs_addr_list *alist;
struct afs_call *call;
struct afs_net *net = vc->cell->net;
__be32 *bp;
@@ -637,8 +648,10 @@ struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc,
return ERR_PTR(-ENOMEM);
call->key = vc->key;
- call->reply[0] = NULL;
- call->ret_reply0 = true;
+ call->ret_alist = NULL;
+ call->max_lifespan = AFS_VL_MAX_LIFESPAN;
+ call->peer = rxrpc_kernel_get_peer(vc->alist->addrs[vc->addr_index].peer);
+ call->service_id = vc->server->service_id;
/* Marshall the parameters */
bp = call->request;
@@ -647,5 +660,134 @@ struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc,
memcpy(bp, uuid, sizeof(*uuid)); /* Type opr_uuid */
trace_afs_make_vl_call(call);
- return (struct afs_addr_list *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
+ afs_make_call(call, GFP_KERNEL);
+ afs_wait_for_call_to_complete(call);
+ vc->call_abort_code = call->abort_code;
+ vc->call_error = call->error;
+ vc->call_responded = call->responded;
+ alist = call->ret_alist;
+ afs_put_call(call);
+ if (vc->call_error) {
+ afs_put_addrlist(alist, afs_alist_trace_put_getaddru);
+ return ERR_PTR(vc->call_error);
+ }
+ return alist;
+}
+
+/*
+ * Deliver reply data to a YFSVL.GetCellName operation.
+ */
+static int afs_deliver_yfsvl_get_cell_name(struct afs_call *call)
+{
+ char *cell_name;
+ u32 namesz, paddedsz;
+ int ret;
+
+ _enter("{%u,%zu/%u}",
+ call->unmarshall, iov_iter_count(call->iter), call->count);
+
+ switch (call->unmarshall) {
+ case 0:
+ afs_extract_to_tmp(call);
+ call->unmarshall++;
+
+ fallthrough; /* and extract the cell name length */
+ case 1:
+ ret = afs_extract_data(call, true);
+ if (ret < 0)
+ return ret;
+
+ namesz = ntohl(call->tmp);
+ if (namesz > YFS_VL_MAXCELLNAME)
+ return afs_protocol_error(call, afs_eproto_cellname_len);
+ paddedsz = (namesz + 3) & ~3;
+ call->count = namesz;
+ call->count2 = paddedsz - namesz;
+
+ cell_name = kmalloc(namesz + 1, GFP_KERNEL);
+ if (!cell_name)
+ return -ENOMEM;
+ cell_name[namesz] = 0;
+ call->ret_str = cell_name;
+
+ afs_extract_begin(call, cell_name, namesz);
+ call->unmarshall++;
+
+ fallthrough; /* and extract cell name */
+ case 2:
+ ret = afs_extract_data(call, true);
+ if (ret < 0)
+ return ret;
+
+ afs_extract_discard(call, call->count2);
+ call->unmarshall++;
+
+ fallthrough; /* and extract padding */
+ case 3:
+ ret = afs_extract_data(call, false);
+ if (ret < 0)
+ return ret;
+
+ call->unmarshall++;
+ break;
+ }
+
+ _leave(" = 0 [done]");
+ return 0;
+}
+
+/*
+ * VL.GetCapabilities operation type
+ */
+static const struct afs_call_type afs_YFSVLGetCellName = {
+ .name = "YFSVL.GetCellName",
+ .op = afs_YFSVL_GetCellName,
+ .deliver = afs_deliver_yfsvl_get_cell_name,
+ .destructor = afs_flat_call_destructor,
+};
+
+/*
+ * Probe a volume server for the capabilities that it supports. This can
+ * return up to 196 words.
+ *
+ * We use this to probe for service upgrade to determine what the server at the
+ * other end supports.
+ */
+char *afs_yfsvl_get_cell_name(struct afs_vl_cursor *vc)
+{
+ struct afs_call *call;
+ struct afs_net *net = vc->cell->net;
+ __be32 *bp;
+ char *cellname;
+
+ _enter("");
+
+ call = afs_alloc_flat_call(net, &afs_YFSVLGetCellName, 1 * 4, 0);
+ if (!call)
+ return ERR_PTR(-ENOMEM);
+
+ call->key = vc->key;
+ call->ret_str = NULL;
+ call->max_lifespan = AFS_VL_MAX_LIFESPAN;
+ call->peer = rxrpc_kernel_get_peer(vc->alist->addrs[vc->addr_index].peer);
+ call->service_id = vc->server->service_id;
+
+ /* marshall the parameters */
+ bp = call->request;
+ *bp++ = htonl(YVLGETCELLNAME);
+
+ /* Can't take a ref on server */
+ trace_afs_make_vl_call(call);
+ afs_make_call(call, GFP_KERNEL);
+ afs_wait_for_call_to_complete(call);
+ vc->call_abort_code = call->abort_code;
+ vc->call_error = call->error;
+ vc->call_responded = call->responded;
+ cellname = call->ret_str;
+ afs_put_call(call);
+ if (vc->call_error) {
+ kfree(cellname);
+ return ERR_PTR(vc->call_error);
+ }
+ return cellname;
}
generated by cgit (git 2.34.1) at 2025-12-24 21:37:45 +0000