#include <linux/ip.h>
#include "internal.h"
#include "afs_cm.h"
+#include "protocol_yfs.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 void SRXAFSCB_ProbeUuid(struct work_struct *);
static void SRXAFSCB_TellMeAboutYourself(struct work_struct *);
+static int afs_deliver_yfs_cb_callback(struct afs_call *);
+
#define CM_NAME(name) \
const char afs_SRXCB##name##_name[] __tracepoint_string = \
"CB." #name
.work = SRXAFSCB_TellMeAboutYourself,
};
+/*
+ * YFS CB.CallBack operation type
+ */
+static CM_NAME(YFS_CallBack);
+static const struct afs_call_type afs_SRXYFSCB_CallBack = {
+ .name = afs_SRXCBYFS_CallBack_name,
+ .deliver = afs_deliver_yfs_cb_callback,
+ .destructor = afs_cm_destructor,
+ .work = SRXAFSCB_CallBack,
+};
+
/*
* route an incoming cache manager call
* - return T if supported, F if not
*/
bool afs_cm_incoming_call(struct afs_call *call)
{
- _enter("{CB.OP %u}", call->operation_ID);
+ _enter("{%u, CB.OP %u}", call->service_id, call->operation_ID);
+
+ call->epoch = rxrpc_kernel_get_epoch(call->net->socket, call->rxcall);
switch (call->operation_ID) {
case CBCallBack:
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;
}
}
+/*
+ * Record a probe to the cache manager from a server.
+ */
+static int afs_record_cm_probe(struct afs_call *call, struct afs_server *server)
+{
+ _enter("");
+
+ if (test_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags) &&
+ !test_bit(AFS_SERVER_FL_PROBING, &server->flags)) {
+ if (server->cm_epoch == call->epoch)
+ return 0;
+
+ if (!server->probe.said_rebooted) {
+ pr_notice("kAFS: FS rebooted %pU\n", &server->uuid);
+ server->probe.said_rebooted = true;
+ }
+ }
+
+ spin_lock(&server->probe_lock);
+
+ if (!test_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags)) {
+ server->cm_epoch = call->epoch;
+ server->probe.cm_epoch = call->epoch;
+ goto out;
+ }
+
+ if (server->probe.cm_probed &&
+ call->epoch != server->probe.cm_epoch &&
+ !server->probe.said_inconsistent) {
+ pr_notice("kAFS: FS endpoints inconsistent %pU\n",
+ &server->uuid);
+ server->probe.said_inconsistent = true;
+ }
+
+ if (!server->probe.cm_probed || call->epoch == server->cm_epoch)
+ server->probe.cm_epoch = server->cm_epoch;
+
+out:
+ server->probe.cm_probed = true;
+ spin_unlock(&server->probe_lock);
+ return 0;
+}
+
+/*
+ * Find the server record by peer address and record a probe to the cache
+ * manager from a server.
+ */
+static int afs_find_cm_server_by_peer(struct afs_call *call)
+{
+ struct sockaddr_rxrpc srx;
+ struct afs_server *server;
+
+ rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
+
+ server = afs_find_server(call->net, &srx);
+ if (!server) {
+ trace_afs_cm_no_server(call, &srx);
+ return 0;
+ }
+
+ call->cm_server = server;
+ return afs_record_cm_probe(call, server);
+}
+
+/*
+ * Find the server record by server UUID and record a probe to the cache
+ * manager from a server.
+ */
+static int afs_find_cm_server_by_uuid(struct afs_call *call,
+ struct afs_uuid *uuid)
+{
+ struct afs_server *server;
+
+ rcu_read_lock();
+ server = afs_find_server_by_uuid(call->net, call->request);
+ rcu_read_unlock();
+ if (!server) {
+ trace_afs_cm_no_server_u(call, call->request);
+ return 0;
+ }
+
+ call->cm_server = server;
+ return afs_record_cm_probe(call, server);
+}
+
/*
* Clean up a cache manager call.
*/
static int afs_deliver_cb_callback(struct afs_call *call)
{
struct afs_callback_break *cb;
- struct sockaddr_rxrpc srx;
__be32 *bp;
int ret, loop;
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 */
case 1:
_debug("extract FID count");
- ret = afs_extract_data(call, &call->tmp, 4, true);
+ 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 afs_protocol_error(call, -EBADMSG);
+ return afs_protocol_error(call, -EBADMSG,
+ afs_eproto_cb_fid_count);
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++;
case 2:
_debug("extract FID array");
- ret = afs_extract_data(call, call->buffer,
- call->count * 3 * 4, true);
+ ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
cb->fid.vid = ntohl(*bp++);
cb->fid.vnode = ntohl(*bp++);
cb->fid.unique = ntohl(*bp++);
- cb->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 */
case 3:
_debug("extract CB count");
- ret = afs_extract_data(call, &call->tmp, 4, true);
+ 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, -EBADMSG);
- call->offset = 0;
+ return afs_protocol_error(call, -EBADMSG,
+ afs_eproto_cb_count);
+ call->_iter = &call->iter;
+ iov_iter_discard(&call->iter, READ, call->count2 * 3 * 4);
call->unmarshall++;
case 4:
- _debug("extract CB array");
- ret = afs_extract_data(call, call->buffer,
- call->count2 * 3 * 4, false);
+ _debug("extract discard %zu/%u",
+ iov_iter_count(&call->iter), call->count2 * 3 * 4);
+
+ ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
- _debug("unmarshall CB array");
- cb = call->request;
- bp = call->buffer;
- for (loop = call->count2; loop > 0; loop--, cb++) {
- cb->cb.version = ntohl(*bp++);
- cb->cb.expiry = ntohl(*bp++);
- cb->cb.type = ntohl(*bp++);
- }
-
- call->offset = 0;
call->unmarshall++;
case 5:
break;
}
if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
- return -EIO;
+ return afs_io_error(call, afs_io_error_cm_reply);
/* we'll need the file server record as that tells us which set of
* vnodes to operate upon */
- rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
- call->cm_server = afs_find_server(call->net, &srx);
- if (!call->cm_server)
- trace_afs_cm_no_server(call, &srx);
-
- return afs_queue_call_work(call);
+ return afs_find_cm_server_by_peer(call);
}
/*
*/
static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
{
- struct sockaddr_rxrpc srx;
int ret;
_enter("");
- rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
-
- ret = afs_extract_data(call, NULL, 0, false);
+ afs_extract_discard(call, 0);
+ ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
/* we'll need the file server record as that tells us which set of
* vnodes to operate upon */
- call->cm_server = afs_find_server(call->net, &srx);
- if (!call->cm_server)
- trace_afs_cm_no_server(call, &srx);
-
- return afs_queue_call_work(call);
+ return afs_find_cm_server_by_peer(call);
}
/*
switch (call->unmarshall) {
case 0:
- call->offset = 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++;
case 1:
_debug("extract UUID");
- ret = afs_extract_data(call, call->buffer,
- 11 * sizeof(__be32), false);
+ ret = afs_extract_data(call, false);
switch (ret) {
case 0: break;
case -EAGAIN: return 0;
for (loop = 0; loop < 6; loop++)
r->node[loop] = ntohl(b[loop + 5]);
- call->offset = 0;
call->unmarshall++;
case 2:
}
if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
- return -EIO;
+ return afs_io_error(call, afs_io_error_cm_reply);
/* we'll need the file server record as that tells us which set of
* vnodes to operate upon */
- rcu_read_lock();
- call->cm_server = afs_find_server_by_uuid(call->net, call->request);
- rcu_read_unlock();
- if (!call->cm_server)
- trace_afs_cm_no_server_u(call, call->request);
-
- return afs_queue_call_work(call);
+ return afs_find_cm_server_by_uuid(call, call->request);
}
/*
_enter("");
- ret = afs_extract_data(call, NULL, 0, false);
+ 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 -EIO;
-
- return afs_queue_call_work(call);
+ return afs_io_error(call, afs_io_error_cm_reply);
+ return afs_find_cm_server_by_peer(call);
}
/*
switch (call->unmarshall) {
case 0:
- call->offset = 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++;
case 1:
_debug("extract UUID");
- ret = afs_extract_data(call, call->buffer,
- 11 * sizeof(__be32), false);
+ ret = afs_extract_data(call, false);
switch (ret) {
case 0: break;
case -EAGAIN: return 0;
for (loop = 0; loop < 6; loop++)
r->node[loop] = ntohl(b[loop + 5]);
- call->offset = 0;
call->unmarshall++;
case 2:
}
if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
- return -EIO;
-
- return afs_queue_call_work(call);
+ return afs_io_error(call, afs_io_error_cm_reply);
+ return afs_find_cm_server_by_uuid(call, call->request);
}
/*
_enter("");
- ret = afs_extract_data(call, NULL, 0, false);
+ 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 -EIO;
+ return afs_io_error(call, afs_io_error_cm_reply);
+ return afs_find_cm_server_by_peer(call);
+}
+
+/*
+ * 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++;
+
+ /* extract the FID array and its count in two steps */
+ 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, -EBADMSG,
+ 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++;
+
+ 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++;
+
+ case 3:
+ break;
+ }
+
+ if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
+ return afs_io_error(call, afs_io_error_cm_reply);
- return afs_queue_call_work(call);
+ /* We'll need the file server record as that tells us which set of
+ * vnodes to operate upon.
+ */
+ return afs_find_cm_server_by_peer(call);
}
git.samba.org / sfrench / cifs-2.6.git / blobdiff