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-rw-r--r--fs/afs/cmservice.c540
1 files changed, 287 insertions, 253 deletions
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index 1c8c6cc6de30..1a906805a9e3 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* AFS Cache Manager Service
*
* 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/module.h>
@@ -16,21 +12,24 @@
#include <linux/ip.h>
#include "internal.h"
#include "afs_cm.h"
-
-#if 0
-struct workqueue_struct *afs_cm_workqueue;
-#endif /* 0 */
-
-static int afs_deliver_cb_init_call_back_state(struct afs_call *,
- struct sk_buff *, bool);
-static int afs_deliver_cb_init_call_back_state3(struct afs_call *,
- struct sk_buff *, bool);
-static int afs_deliver_cb_probe(struct afs_call *, struct sk_buff *, bool);
-static int afs_deliver_cb_callback(struct afs_call *, struct sk_buff *, bool);
-static int afs_deliver_cb_probe_uuid(struct afs_call *, struct sk_buff *, bool);
-static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *,
- struct sk_buff *, bool);
+#include "protocol_yfs.h"
+#define RXRPC_TRACE_ONLY_DEFINE_ENUMS
+#include <trace/events/rxrpc.h>
+
+static int afs_deliver_cb_init_call_back_state(struct afs_call *);
+static int afs_deliver_cb_init_call_back_state3(struct afs_call *);
+static int afs_deliver_cb_probe(struct afs_call *);
+static int afs_deliver_cb_callback(struct afs_call *);
+static int afs_deliver_cb_probe_uuid(struct afs_call *);
+static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *);
static void afs_cm_destructor(struct afs_call *);
+static void SRXAFSCB_CallBack(struct work_struct *);
+static void SRXAFSCB_InitCallBackState(struct work_struct *);
+static void SRXAFSCB_Probe(struct work_struct *);
+static void SRXAFSCB_ProbeUuid(struct work_struct *);
+static void SRXAFSCB_TellMeAboutYourself(struct work_struct *);
+
+static int afs_deliver_yfs_cb_callback(struct afs_call *);
/*
* CB.CallBack operation type
@@ -38,8 +37,8 @@ static void afs_cm_destructor(struct afs_call *);
static const struct afs_call_type afs_SRXCBCallBack = {
.name = "CB.CallBack",
.deliver = afs_deliver_cb_callback,
- .abort_to_error = afs_abort_to_error,
.destructor = afs_cm_destructor,
+ .work = SRXAFSCB_CallBack,
};
/*
@@ -48,8 +47,8 @@ static const struct afs_call_type afs_SRXCBCallBack = {
static const struct afs_call_type afs_SRXCBInitCallBackState = {
.name = "CB.InitCallBackState",
.deliver = afs_deliver_cb_init_call_back_state,
- .abort_to_error = afs_abort_to_error,
.destructor = afs_cm_destructor,
+ .work = SRXAFSCB_InitCallBackState,
};
/*
@@ -58,8 +57,8 @@ static const struct afs_call_type afs_SRXCBInitCallBackState = {
static const struct afs_call_type afs_SRXCBInitCallBackState3 = {
.name = "CB.InitCallBackState3",
.deliver = afs_deliver_cb_init_call_back_state3,
- .abort_to_error = afs_abort_to_error,
.destructor = afs_cm_destructor,
+ .work = SRXAFSCB_InitCallBackState,
};
/*
@@ -68,8 +67,8 @@ static const struct afs_call_type afs_SRXCBInitCallBackState3 = {
static const struct afs_call_type afs_SRXCBProbe = {
.name = "CB.Probe",
.deliver = afs_deliver_cb_probe,
- .abort_to_error = afs_abort_to_error,
.destructor = afs_cm_destructor,
+ .work = SRXAFSCB_Probe,
};
/*
@@ -78,8 +77,8 @@ static const struct afs_call_type afs_SRXCBProbe = {
static const struct afs_call_type afs_SRXCBProbeUuid = {
.name = "CB.ProbeUuid",
.deliver = afs_deliver_cb_probe_uuid,
- .abort_to_error = afs_abort_to_error,
.destructor = afs_cm_destructor,
+ .work = SRXAFSCB_ProbeUuid,
};
/*
@@ -88,8 +87,18 @@ static const struct afs_call_type afs_SRXCBProbeUuid = {
static const struct afs_call_type afs_SRXCBTellMeAboutYourself = {
.name = "CB.TellMeAboutYourself",
.deliver = afs_deliver_cb_tell_me_about_yourself,
- .abort_to_error = afs_abort_to_error,
.destructor = afs_cm_destructor,
+ .work = SRXAFSCB_TellMeAboutYourself,
+};
+
+/*
+ * YFS CB.CallBack operation type
+ */
+static const struct afs_call_type afs_SRXYFSCB_CallBack = {
+ .name = "YFSCB.CallBack",
+ .deliver = afs_deliver_yfs_cb_callback,
+ .destructor = afs_cm_destructor,
+ .work = SRXAFSCB_CallBack,
};
/*
@@ -98,11 +107,9 @@ static const struct afs_call_type afs_SRXCBTellMeAboutYourself = {
*/
bool afs_cm_incoming_call(struct afs_call *call)
{
- u32 operation_id = ntohl(call->operation_ID);
-
- _enter("{CB.OP %u}", operation_id);
+ _enter("{%u, CB.OP %u}", call->service_id, call->operation_ID);
- switch (operation_id) {
+ switch (call->operation_ID) {
case CBCallBack:
call->type = &afs_SRXCBCallBack;
return true;
@@ -115,29 +122,44 @@ bool afs_cm_incoming_call(struct afs_call *call)
case CBProbe:
call->type = &afs_SRXCBProbe;
return true;
+ case CBProbeUuid:
+ call->type = &afs_SRXCBProbeUuid;
+ return true;
case CBTellMeAboutYourself:
call->type = &afs_SRXCBTellMeAboutYourself;
return true;
+ case YFSCBCallBack:
+ if (call->service_id != YFS_CM_SERVICE)
+ return false;
+ call->type = &afs_SRXYFSCB_CallBack;
+ return true;
default:
return false;
}
}
/*
- * clean up a cache manager call
+ * Clean up a cache manager call.
*/
static void afs_cm_destructor(struct afs_call *call)
{
- _enter("");
-
- afs_put_server(call->server);
- call->server = NULL;
kfree(call->buffer);
call->buffer = NULL;
}
/*
- * allow the fileserver to see if the cache manager is still alive
+ * Abort a service call from within an action function.
+ */
+static void afs_abort_service_call(struct afs_call *call, u32 abort_code, int error,
+ enum rxrpc_abort_reason why)
+{
+ rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
+ abort_code, error, why);
+ afs_set_call_complete(call, error, 0);
+}
+
+/*
+ * The server supplied a list of callbacks that it wanted to break.
*/
static void SRXAFSCB_CallBack(struct work_struct *work)
{
@@ -145,71 +167,69 @@ static void SRXAFSCB_CallBack(struct work_struct *work)
_enter("");
- /* be sure to send the reply *before* attempting to spam the AFS server
- * with FSFetchStatus requests on the vnodes with broken callbacks lest
- * the AFS server get into a vicious cycle of trying to break further
- * callbacks because it hadn't received completion of the CBCallBack op
- * yet */
- afs_send_empty_reply(call);
+ /* We need to break the callbacks before sending the reply as the
+ * server holds up change visibility till it receives our reply so as
+ * to maintain cache coherency.
+ */
+ if (call->server) {
+ trace_afs_server(call->server->debug_id,
+ refcount_read(&call->server->ref),
+ atomic_read(&call->server->active),
+ afs_server_trace_callback);
+ afs_break_callbacks(call->server, call->count, call->request);
+ }
- afs_break_callbacks(call->server, call->count, call->request);
+ afs_send_empty_reply(call);
+ afs_put_call(call);
_leave("");
}
/*
* deliver request data to a CB.CallBack call
*/
-static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
- bool last)
+static int afs_deliver_cb_callback(struct afs_call *call)
{
- struct afs_callback *cb;
- struct afs_server *server;
- struct in_addr addr;
+ struct afs_callback_break *cb;
__be32 *bp;
- u32 tmp;
int ret, loop;
- _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
+ _enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
- call->offset = 0;
+ afs_extract_to_tmp(call);
call->unmarshall++;
/* extract the FID array and its count in two steps */
+ fallthrough;
case 1:
_debug("extract FID count");
- ret = afs_extract_data(call, skb, last, &call->tmp, 4);
- switch (ret) {
- case 0: break;
- case -EAGAIN: return 0;
- default: return ret;
- }
+ ret = afs_extract_data(call, true);
+ if (ret < 0)
+ return ret;
call->count = ntohl(call->tmp);
_debug("FID count: %u", call->count);
if (call->count > AFSCBMAX)
- return -EBADMSG;
+ return afs_protocol_error(call, afs_eproto_cb_fid_count);
- call->buffer = kmalloc(call->count * 3 * 4, GFP_KERNEL);
+ call->buffer = kmalloc(array3_size(call->count, 3, 4),
+ GFP_KERNEL);
if (!call->buffer)
return -ENOMEM;
- call->offset = 0;
+ afs_extract_to_buf(call, call->count * 3 * 4);
call->unmarshall++;
+ fallthrough;
case 2:
_debug("extract FID array");
- ret = afs_extract_data(call, skb, last, call->buffer,
- call->count * 3 * 4);
- switch (ret) {
- case 0: break;
- case -EAGAIN: return 0;
- default: return ret;
- }
+ ret = afs_extract_data(call, true);
+ if (ret < 0)
+ return ret;
_debug("unmarshall FID array");
call->request = kcalloc(call->count,
- sizeof(struct afs_callback),
+ sizeof(struct afs_callback_break),
GFP_KERNEL);
if (!call->request)
return -ENOMEM;
@@ -220,76 +240,45 @@ static int afs_deliver_cb_callback(struct afs_call *call, struct sk_buff *skb,
cb->fid.vid = ntohl(*bp++);
cb->fid.vnode = ntohl(*bp++);
cb->fid.unique = ntohl(*bp++);
- cb->type = AFSCM_CB_UNTYPED;
}
- call->offset = 0;
+ afs_extract_to_tmp(call);
call->unmarshall++;
/* extract the callback array and its count in two steps */
+ fallthrough;
case 3:
_debug("extract CB count");
- ret = afs_extract_data(call, skb, last, &call->tmp, 4);
- switch (ret) {
- case 0: break;
- case -EAGAIN: return 0;
- default: return ret;
- }
-
- tmp = ntohl(call->tmp);
- _debug("CB count: %u", tmp);
- if (tmp != call->count && tmp != 0)
- return -EBADMSG;
- call->offset = 0;
+ ret = afs_extract_data(call, true);
+ if (ret < 0)
+ return ret;
+
+ call->count2 = ntohl(call->tmp);
+ _debug("CB count: %u", call->count2);
+ if (call->count2 != call->count && call->count2 != 0)
+ return afs_protocol_error(call, afs_eproto_cb_count);
+ call->iter = &call->def_iter;
+ iov_iter_discard(&call->def_iter, ITER_DEST, call->count2 * 3 * 4);
call->unmarshall++;
- if (tmp == 0)
- goto empty_cb_array;
+ fallthrough;
case 4:
- _debug("extract CB array");
- ret = afs_extract_data(call, skb, last, call->request,
- call->count * 3 * 4);
- switch (ret) {
- case 0: break;
- case -EAGAIN: return 0;
- default: return ret;
- }
+ _debug("extract discard %zu/%u",
+ iov_iter_count(call->iter), call->count2 * 3 * 4);
- _debug("unmarshall CB array");
- cb = call->request;
- bp = call->buffer;
- for (loop = call->count; loop > 0; loop--, cb++) {
- cb->version = ntohl(*bp++);
- cb->expiry = ntohl(*bp++);
- cb->type = ntohl(*bp++);
- }
+ ret = afs_extract_data(call, false);
+ if (ret < 0)
+ return ret;
- empty_cb_array:
- call->offset = 0;
call->unmarshall++;
+ fallthrough;
case 5:
- _debug("trailer");
- if (skb->len != 0)
- return -EBADMSG;
break;
}
- if (!last)
- return 0;
-
- call->state = AFS_CALL_REPLYING;
-
- /* we'll need the file server record as that tells us which set of
- * vnodes to operate upon */
- memcpy(&addr, &ip_hdr(skb)->saddr, 4);
- server = afs_find_server(&addr);
- if (!server)
- return -ENOTCONN;
- call->server = server;
-
- INIT_WORK(&call->work, SRXAFSCB_CallBack);
- queue_work(afs_wq, &call->work);
+ if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
+ return afs_io_error(call, afs_io_error_cm_reply);
return 0;
}
@@ -302,72 +291,86 @@ static void SRXAFSCB_InitCallBackState(struct work_struct *work)
_enter("{%p}", call->server);
- afs_init_callback_state(call->server);
+ if (call->server)
+ afs_init_callback_state(call->server);
afs_send_empty_reply(call);
+ afs_put_call(call);
_leave("");
}
/*
* deliver request data to a CB.InitCallBackState call
*/
-static int afs_deliver_cb_init_call_back_state(struct afs_call *call,
- struct sk_buff *skb,
- bool last)
+static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
{
- struct afs_server *server;
- struct in_addr addr;
-
- _enter(",{%u},%d", skb->len, last);
-
- if (skb->len > 0)
- return -EBADMSG;
- if (!last)
- return 0;
-
- /* no unmarshalling required */
- call->state = AFS_CALL_REPLYING;
-
- /* we'll need the file server record as that tells us which set of
- * vnodes to operate upon */
- memcpy(&addr, &ip_hdr(skb)->saddr, 4);
- server = afs_find_server(&addr);
- if (!server)
- return -ENOTCONN;
- call->server = server;
+ _enter("");
- INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
- queue_work(afs_wq, &call->work);
- return 0;
+ afs_extract_discard(call, 0);
+ return afs_extract_data(call, false);
}
/*
* deliver request data to a CB.InitCallBackState3 call
*/
-static int afs_deliver_cb_init_call_back_state3(struct afs_call *call,
- struct sk_buff *skb,
- bool last)
+static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
{
- struct afs_server *server;
- struct in_addr addr;
+ struct afs_uuid *r;
+ unsigned loop;
+ __be32 *b;
+ int ret;
- _enter(",{%u},%d", skb->len, last);
+ _enter("{%u}", call->unmarshall);
- if (!last)
- return 0;
+ switch (call->unmarshall) {
+ case 0:
+ call->buffer = kmalloc_array(11, sizeof(__be32), GFP_KERNEL);
+ if (!call->buffer)
+ return -ENOMEM;
+ afs_extract_to_buf(call, 11 * sizeof(__be32));
+ call->unmarshall++;
+
+ fallthrough;
+ case 1:
+ _debug("extract UUID");
+ ret = afs_extract_data(call, false);
+ switch (ret) {
+ case 0: break;
+ case -EAGAIN: return 0;
+ default: return ret;
+ }
+
+ _debug("unmarshall UUID");
+ call->request = kmalloc(sizeof(struct afs_uuid), GFP_KERNEL);
+ if (!call->request)
+ return -ENOMEM;
+
+ b = call->buffer;
+ r = call->request;
+ r->time_low = b[0];
+ r->time_mid = htons(ntohl(b[1]));
+ r->time_hi_and_version = htons(ntohl(b[2]));
+ r->clock_seq_hi_and_reserved = ntohl(b[3]);
+ r->clock_seq_low = ntohl(b[4]);
- /* no unmarshalling required */
- call->state = AFS_CALL_REPLYING;
+ for (loop = 0; loop < 6; loop++)
+ r->node[loop] = ntohl(b[loop + 5]);
- /* we'll need the file server record as that tells us which set of
- * vnodes to operate upon */
- memcpy(&addr, &ip_hdr(skb)->saddr, 4);
- server = afs_find_server(&addr);
- if (!server)
- return -ENOTCONN;
- call->server = server;
+ call->unmarshall++;
+ fallthrough;
+
+ case 2:
+ break;
+ }
+
+ if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
+ return afs_io_error(call, afs_io_error_cm_reply);
+
+ if (memcmp(call->request, &call->server->_uuid, sizeof(call->server->_uuid)) != 0) {
+ pr_notice("Callback UUID does not match fileserver UUID\n");
+ trace_afs_cm_no_server_u(call, call->request);
+ return 0;
+ }
- INIT_WORK(&call->work, SRXAFSCB_InitCallBackState);
- queue_work(afs_wq, &call->work);
return 0;
}
@@ -380,84 +383,73 @@ static void SRXAFSCB_Probe(struct work_struct *work)
_enter("");
afs_send_empty_reply(call);
+ afs_put_call(call);
_leave("");
}
/*
* deliver request data to a CB.Probe call
*/
-static int afs_deliver_cb_probe(struct afs_call *call, struct sk_buff *skb,
- bool last)
+static int afs_deliver_cb_probe(struct afs_call *call)
{
- _enter(",{%u},%d", skb->len, last);
+ int ret;
- if (skb->len > 0)
- return -EBADMSG;
- if (!last)
- return 0;
+ _enter("");
- /* no unmarshalling required */
- call->state = AFS_CALL_REPLYING;
+ afs_extract_discard(call, 0);
+ ret = afs_extract_data(call, false);
+ if (ret < 0)
+ return ret;
- INIT_WORK(&call->work, SRXAFSCB_Probe);
- queue_work(afs_wq, &call->work);
+ if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
+ return afs_io_error(call, afs_io_error_cm_reply);
return 0;
}
/*
- * allow the fileserver to quickly find out if the fileserver has been rebooted
+ * Allow the fileserver to quickly find out if the cache manager has been
+ * rebooted.
*/
static void SRXAFSCB_ProbeUuid(struct work_struct *work)
{
struct afs_call *call = container_of(work, struct afs_call, work);
struct afs_uuid *r = call->request;
- struct {
- __be32 match;
- } reply;
-
_enter("");
-
- if (memcmp(r, &afs_uuid, sizeof(afs_uuid)) == 0)
- reply.match = htonl(0);
+ if (memcmp(r, &call->net->uuid, sizeof(call->net->uuid)) == 0)
+ afs_send_empty_reply(call);
else
- reply.match = htonl(1);
+ afs_abort_service_call(call, 1, 1, afs_abort_probeuuid_negative);
- afs_send_simple_reply(call, &reply, sizeof(reply));
+ afs_put_call(call);
_leave("");
}
/*
* deliver request data to a CB.ProbeUuid call
*/
-static int afs_deliver_cb_probe_uuid(struct afs_call *call, struct sk_buff *skb,
- bool last)
+static int afs_deliver_cb_probe_uuid(struct afs_call *call)
{
struct afs_uuid *r;
unsigned loop;
__be32 *b;
int ret;
- _enter("{%u},{%u},%d", call->unmarshall, skb->len, last);
-
- if (skb->len > 0)
- return -EBADMSG;
- if (!last)
- return 0;
+ _enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
- call->offset = 0;
- call->buffer = kmalloc(11 * sizeof(__be32), GFP_KERNEL);
+ call->buffer = kmalloc_array(11, sizeof(__be32), GFP_KERNEL);
if (!call->buffer)
return -ENOMEM;
+ afs_extract_to_buf(call, 11 * sizeof(__be32));
call->unmarshall++;
+ fallthrough;
case 1:
_debug("extract UUID");
- ret = afs_extract_data(call, skb, last, call->buffer,
- 11 * sizeof(__be32));
+ ret = afs_extract_data(call, false);
switch (ret) {
case 0: break;
case -EAGAIN: return 0;
@@ -471,32 +463,24 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call, struct sk_buff *skb,
b = call->buffer;
r = call->request;
- r->time_low = ntohl(b[0]);
- r->time_mid = ntohl(b[1]);
- r->time_hi_and_version = ntohl(b[2]);
+ r->time_low = b[0];
+ r->time_mid = htons(ntohl(b[1]));
+ r->time_hi_and_version = htons(ntohl(b[2]));
r->clock_seq_hi_and_reserved = ntohl(b[3]);
r->clock_seq_low = ntohl(b[4]);
for (loop = 0; loop < 6; loop++)
r->node[loop] = ntohl(b[loop + 5]);
- call->offset = 0;
call->unmarshall++;
+ fallthrough;
case 2:
- _debug("trailer");
- if (skb->len != 0)
- return -EBADMSG;
break;
}
- if (!last)
- return 0;
-
- call->state = AFS_CALL_REPLYING;
-
- INIT_WORK(&call->work, SRXAFSCB_ProbeUuid);
- queue_work(afs_wq, &call->work);
+ if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
+ return afs_io_error(call, afs_io_error_cm_reply);
return 0;
}
@@ -505,9 +489,8 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call, struct sk_buff *skb,
*/
static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
{
- struct afs_interface *ifs;
struct afs_call *call = container_of(work, struct afs_call, work);
- int loop, nifs;
+ int loop;
struct {
struct /* InterfaceAddr */ {
@@ -525,61 +508,112 @@ static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
_enter("");
- nifs = 0;
- ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
- if (ifs) {
- nifs = afs_get_ipv4_interfaces(ifs, 32, false);
- if (nifs < 0) {
- kfree(ifs);
- ifs = NULL;
- nifs = 0;
- }
- }
-
memset(&reply, 0, sizeof(reply));
- reply.ia.nifs = htonl(nifs);
- reply.ia.uuid[0] = htonl(afs_uuid.time_low);
- reply.ia.uuid[1] = htonl(afs_uuid.time_mid);
- reply.ia.uuid[2] = htonl(afs_uuid.time_hi_and_version);
- reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved);
- reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low);
+ reply.ia.uuid[0] = call->net->uuid.time_low;
+ reply.ia.uuid[1] = htonl(ntohs(call->net->uuid.time_mid));
+ reply.ia.uuid[2] = htonl(ntohs(call->net->uuid.time_hi_and_version));
+ reply.ia.uuid[3] = htonl((s8) call->net->uuid.clock_seq_hi_and_reserved);
+ reply.ia.uuid[4] = htonl((s8) call->net->uuid.clock_seq_low);
for (loop = 0; loop < 6; loop++)
- reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]);
-
- if (ifs) {
- for (loop = 0; loop < nifs; loop++) {
- reply.ia.ifaddr[loop] = ifs[loop].address.s_addr;
- reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
- reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
- }
- kfree(ifs);
- }
+ reply.ia.uuid[loop + 5] = htonl((s8) call->net->uuid.node[loop]);
reply.cap.capcount = htonl(1);
reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
afs_send_simple_reply(call, &reply, sizeof(reply));
-
+ afs_put_call(call);
_leave("");
}
/*
* deliver request data to a CB.TellMeAboutYourself call
*/
-static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *call,
- struct sk_buff *skb, bool last)
+static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *call)
{
- _enter(",{%u},%d", skb->len, last);
+ int ret;
- if (skb->len > 0)
- return -EBADMSG;
- if (!last)
- return 0;
+ _enter("");
+
+ afs_extract_discard(call, 0);
+ ret = afs_extract_data(call, false);
+ if (ret < 0)
+ return ret;
+
+ if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
+ return afs_io_error(call, afs_io_error_cm_reply);
+ return 0;
+}
+
+/*
+ * deliver request data to a YFS CB.CallBack call
+ */
+static int afs_deliver_yfs_cb_callback(struct afs_call *call)
+{
+ struct afs_callback_break *cb;
+ struct yfs_xdr_YFSFid *bp;
+ size_t size;
+ int ret, loop;
+
+ _enter("{%u}", call->unmarshall);
+
+ switch (call->unmarshall) {
+ case 0:
+ afs_extract_to_tmp(call);
+ call->unmarshall++;
- /* no unmarshalling required */
- call->state = AFS_CALL_REPLYING;
+ /* extract the FID array and its count in two steps */
+ fallthrough;
+ case 1:
+ _debug("extract FID count");
+ ret = afs_extract_data(call, true);
+ if (ret < 0)
+ return ret;
+
+ call->count = ntohl(call->tmp);
+ _debug("FID count: %u", call->count);
+ if (call->count > YFSCBMAX)
+ return afs_protocol_error(call, afs_eproto_cb_fid_count);
+
+ size = array_size(call->count, sizeof(struct yfs_xdr_YFSFid));
+ call->buffer = kmalloc(size, GFP_KERNEL);
+ if (!call->buffer)
+ return -ENOMEM;
+ afs_extract_to_buf(call, size);
+ call->unmarshall++;
+
+ fallthrough;
+ case 2:
+ _debug("extract FID array");
+ ret = afs_extract_data(call, false);
+ if (ret < 0)
+ return ret;
+
+ _debug("unmarshall FID array");
+ call->request = kcalloc(call->count,
+ sizeof(struct afs_callback_break),
+ GFP_KERNEL);
+ if (!call->request)
+ return -ENOMEM;
+
+ cb = call->request;
+ bp = call->buffer;
+ for (loop = call->count; loop > 0; loop--, cb++) {
+ cb->fid.vid = xdr_to_u64(bp->volume);
+ cb->fid.vnode = xdr_to_u64(bp->vnode.lo);
+ cb->fid.vnode_hi = ntohl(bp->vnode.hi);
+ cb->fid.unique = ntohl(bp->vnode.unique);
+ bp++;
+ }
+
+ afs_extract_to_tmp(call);
+ call->unmarshall++;
+ fallthrough;
+
+ case 3:
+ break;
+ }
- INIT_WORK(&call->work, SRXAFSCB_TellMeAboutYourself);
- queue_work(afs_wq, &call->work);
+ if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
+ return afs_io_error(call, afs_io_error_cm_reply);
return 0;
}
generated by cgit (git 2.34.1) at 2025-12-25 08:24:46 +0000