![Linus Torvalds](/assets/img/avatar_default.png)
Pull networking updates from David Miller: "Some highlights from this development cycle: 1) Big refactoring of ipv6 route and neigh handling to support nexthop objects configurable as units from userspace. From David Ahern. 2) Convert explored_states in BPF verifier into a hash table, significantly decreased state held for programs with bpf2bpf calls, from Alexei Starovoitov. 3) Implement bpf_send_signal() helper, from Yonghong Song. 4) Various classifier enhancements to mvpp2 driver, from Maxime Chevallier. 5) Add aRFS support to hns3 driver, from Jian Shen. 6) Fix use after free in inet frags by allocating fqdirs dynamically and reworking how rhashtable dismantle occurs, from Eric Dumazet. 7) Add act_ctinfo packet classifier action, from Kevin Darbyshire-Bryant. 8) Add TFO key backup infrastructure, from Jason Baron. 9) Remove several old and unused ISDN drivers, from Arnd Bergmann. 10) Add devlink notifications for flash update status to mlxsw driver, from Jiri Pirko. 11) Lots of kTLS offload infrastructure fixes, from Jakub Kicinski. 12) Add support for mv88e6250 DSA chips, from Rasmus Villemoes. 13) Various enhancements to ipv6 flow label handling, from Eric Dumazet and Willem de Bruijn. 14) Support TLS offload in nfp driver, from Jakub Kicinski, Dirk van der Merwe, and others. 15) Various improvements to axienet driver including converting it to phylink, from Robert Hancock. 16) Add PTP support to sja1105 DSA driver, from Vladimir Oltean. 17) Add mqprio qdisc offload support to dpaa2-eth, from Ioana Radulescu. 18) Add devlink health reporting to mlx5, from Moshe Shemesh. 19) Convert stmmac over to phylink, from Jose Abreu. 20) Add PTP PHC (Physical Hardware Clock) support to mlxsw, from Shalom Toledo. 21) Add nftables SYNPROXY support, from Fernando Fernandez Mancera. 22) Convert tcp_fastopen over to use SipHash, from Ard Biesheuvel. 23) Track spill/fill of constants in BPF verifier, from Alexei Starovoitov. 24) Support bounded loops in BPF, from Alexei Starovoitov. 25) Various page_pool API fixes and improvements, from Jesper Dangaard Brouer. 26) Just like ipv4, support ref-countless ipv6 route handling. From Wei Wang. 27) Support VLAN offloading in aquantia driver, from Igor Russkikh. 28) Add AF_XDP zero-copy support to mlx5, from Maxim Mikityanskiy. 29) Add flower GRE encap/decap support to nfp driver, from Pieter Jansen van Vuuren. 30) Protect against stack overflow when using act_mirred, from John Hurley. 31) Allow devmap map lookups from eBPF, from Toke Høiland-Jørgensen. 32) Use page_pool API in netsec driver, Ilias Apalodimas. 33) Add Google gve network driver, from Catherine Sullivan. 34) More indirect call avoidance, from Paolo Abeni. 35) Add kTLS TX HW offload support to mlx5, from Tariq Toukan. 36) Add XDP_REDIRECT support to bnxt_en, from Andy Gospodarek. 37) Add MPLS manipulation actions to TC, from John Hurley. 38) Add sending a packet to connection tracking from TC actions, and then allow flower classifier matching on conntrack state. From Paul Blakey. 39) Netfilter hw offload support, from Pablo Neira Ayuso" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2080 commits) net/mlx5e: Return in default case statement in tx_post_resync_params mlx5: Return -EINVAL when WARN_ON_ONCE triggers in mlx5e_tls_resync(). net: dsa: add support for BRIDGE_MROUTER attribute pkt_sched: Include const.h net: netsec: remove static declaration for netsec_set_tx_de() net: netsec: remove superfluous if statement netfilter: nf_tables: add hardware offload support net: flow_offload: rename tc_cls_flower_offload to flow_cls_offload net: flow_offload: add flow_block_cb_is_busy() and use it net: sched: remove tcf block API drivers: net: use flow block API net: sched: use flow block API net: flow_offload: add flow_block_cb_{priv, incref, decref}() net: flow_offload: add list handling functions net: flow_offload: add flow_block_cb_alloc() and flow_block_cb_free() net: flow_offload: rename TCF_BLOCK_BINDER_TYPE_* to FLOW_BLOCK_BINDER_TYPE_* net: flow_offload: rename TC_BLOCK_{UN}BIND to FLOW_BLOCK_{UN}BIND net: flow_offload: add flow_block_cb_setup_simple() net: hisilicon: Add an tx_desc to adapt HI13X1_GMAC net: hisilicon: Add an rx_desc to adapt HI13X1_GMAC ...
718 lines
17 KiB
C
718 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* AFS Cache Manager Service
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*
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* Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/sched.h>
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#include <linux/ip.h>
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#include "internal.h"
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#include "afs_cm.h"
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#include "protocol_yfs.h"
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static int afs_deliver_cb_init_call_back_state(struct afs_call *);
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static int afs_deliver_cb_init_call_back_state3(struct afs_call *);
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static int afs_deliver_cb_probe(struct afs_call *);
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static int afs_deliver_cb_callback(struct afs_call *);
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static int afs_deliver_cb_probe_uuid(struct afs_call *);
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static int afs_deliver_cb_tell_me_about_yourself(struct afs_call *);
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static void afs_cm_destructor(struct afs_call *);
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static void SRXAFSCB_CallBack(struct work_struct *);
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static void SRXAFSCB_InitCallBackState(struct work_struct *);
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static void SRXAFSCB_Probe(struct work_struct *);
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static void SRXAFSCB_ProbeUuid(struct work_struct *);
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static void SRXAFSCB_TellMeAboutYourself(struct work_struct *);
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static int afs_deliver_yfs_cb_callback(struct afs_call *);
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#define CM_NAME(name) \
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char afs_SRXCB##name##_name[] __tracepoint_string = \
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"CB." #name
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/*
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* CB.CallBack operation type
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*/
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static CM_NAME(CallBack);
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static const struct afs_call_type afs_SRXCBCallBack = {
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.name = afs_SRXCBCallBack_name,
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.deliver = afs_deliver_cb_callback,
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.destructor = afs_cm_destructor,
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.work = SRXAFSCB_CallBack,
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};
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/*
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* CB.InitCallBackState operation type
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*/
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static CM_NAME(InitCallBackState);
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static const struct afs_call_type afs_SRXCBInitCallBackState = {
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.name = afs_SRXCBInitCallBackState_name,
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.deliver = afs_deliver_cb_init_call_back_state,
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.destructor = afs_cm_destructor,
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.work = SRXAFSCB_InitCallBackState,
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};
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/*
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* CB.InitCallBackState3 operation type
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*/
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static CM_NAME(InitCallBackState3);
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static const struct afs_call_type afs_SRXCBInitCallBackState3 = {
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.name = afs_SRXCBInitCallBackState3_name,
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.deliver = afs_deliver_cb_init_call_back_state3,
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.destructor = afs_cm_destructor,
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.work = SRXAFSCB_InitCallBackState,
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};
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/*
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* CB.Probe operation type
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*/
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static CM_NAME(Probe);
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static const struct afs_call_type afs_SRXCBProbe = {
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.name = afs_SRXCBProbe_name,
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.deliver = afs_deliver_cb_probe,
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.destructor = afs_cm_destructor,
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.work = SRXAFSCB_Probe,
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};
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/*
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* CB.ProbeUuid operation type
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*/
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static CM_NAME(ProbeUuid);
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static const struct afs_call_type afs_SRXCBProbeUuid = {
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.name = afs_SRXCBProbeUuid_name,
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.deliver = afs_deliver_cb_probe_uuid,
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.destructor = afs_cm_destructor,
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.work = SRXAFSCB_ProbeUuid,
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};
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/*
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* CB.TellMeAboutYourself operation type
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*/
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static CM_NAME(TellMeAboutYourself);
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static const struct afs_call_type afs_SRXCBTellMeAboutYourself = {
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.name = afs_SRXCBTellMeAboutYourself_name,
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.deliver = afs_deliver_cb_tell_me_about_yourself,
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.destructor = afs_cm_destructor,
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.work = SRXAFSCB_TellMeAboutYourself,
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};
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/*
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* YFS CB.CallBack operation type
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*/
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static CM_NAME(YFS_CallBack);
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static const struct afs_call_type afs_SRXYFSCB_CallBack = {
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.name = afs_SRXCBYFS_CallBack_name,
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.deliver = afs_deliver_yfs_cb_callback,
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.destructor = afs_cm_destructor,
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.work = SRXAFSCB_CallBack,
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};
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/*
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* route an incoming cache manager call
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* - return T if supported, F if not
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*/
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bool afs_cm_incoming_call(struct afs_call *call)
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{
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_enter("{%u, CB.OP %u}", call->service_id, call->operation_ID);
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call->epoch = rxrpc_kernel_get_epoch(call->net->socket, call->rxcall);
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switch (call->operation_ID) {
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case CBCallBack:
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call->type = &afs_SRXCBCallBack;
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return true;
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case CBInitCallBackState:
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call->type = &afs_SRXCBInitCallBackState;
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return true;
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case CBInitCallBackState3:
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call->type = &afs_SRXCBInitCallBackState3;
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return true;
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case CBProbe:
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call->type = &afs_SRXCBProbe;
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return true;
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case CBProbeUuid:
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call->type = &afs_SRXCBProbeUuid;
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return true;
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case CBTellMeAboutYourself:
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call->type = &afs_SRXCBTellMeAboutYourself;
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return true;
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case YFSCBCallBack:
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if (call->service_id != YFS_CM_SERVICE)
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return false;
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call->type = &afs_SRXYFSCB_CallBack;
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return true;
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default:
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return false;
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}
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}
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/*
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* Record a probe to the cache manager from a server.
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*/
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static int afs_record_cm_probe(struct afs_call *call, struct afs_server *server)
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{
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_enter("");
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if (test_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags) &&
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!test_bit(AFS_SERVER_FL_PROBING, &server->flags)) {
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if (server->cm_epoch == call->epoch)
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return 0;
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if (!server->probe.said_rebooted) {
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pr_notice("kAFS: FS rebooted %pU\n", &server->uuid);
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server->probe.said_rebooted = true;
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}
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}
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spin_lock(&server->probe_lock);
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if (!test_bit(AFS_SERVER_FL_HAVE_EPOCH, &server->flags)) {
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server->cm_epoch = call->epoch;
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server->probe.cm_epoch = call->epoch;
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goto out;
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}
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if (server->probe.cm_probed &&
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call->epoch != server->probe.cm_epoch &&
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!server->probe.said_inconsistent) {
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pr_notice("kAFS: FS endpoints inconsistent %pU\n",
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&server->uuid);
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server->probe.said_inconsistent = true;
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}
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if (!server->probe.cm_probed || call->epoch == server->cm_epoch)
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server->probe.cm_epoch = server->cm_epoch;
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out:
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server->probe.cm_probed = true;
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spin_unlock(&server->probe_lock);
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return 0;
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}
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/*
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* Find the server record by peer address and record a probe to the cache
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* manager from a server.
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*/
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static int afs_find_cm_server_by_peer(struct afs_call *call)
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{
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struct sockaddr_rxrpc srx;
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struct afs_server *server;
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rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
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server = afs_find_server(call->net, &srx);
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if (!server) {
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trace_afs_cm_no_server(call, &srx);
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return 0;
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}
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call->server = server;
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return afs_record_cm_probe(call, server);
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}
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/*
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* Find the server record by server UUID and record a probe to the cache
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* manager from a server.
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*/
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static int afs_find_cm_server_by_uuid(struct afs_call *call,
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struct afs_uuid *uuid)
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{
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struct afs_server *server;
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rcu_read_lock();
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server = afs_find_server_by_uuid(call->net, call->request);
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rcu_read_unlock();
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if (!server) {
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trace_afs_cm_no_server_u(call, call->request);
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return 0;
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}
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call->server = server;
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return afs_record_cm_probe(call, server);
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}
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/*
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* Clean up a cache manager call.
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*/
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static void afs_cm_destructor(struct afs_call *call)
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{
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kfree(call->buffer);
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call->buffer = NULL;
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}
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/*
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* The server supplied a list of callbacks that it wanted to break.
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*/
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static void SRXAFSCB_CallBack(struct work_struct *work)
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{
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struct afs_call *call = container_of(work, struct afs_call, work);
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_enter("");
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/* We need to break the callbacks before sending the reply as the
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* server holds up change visibility till it receives our reply so as
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* to maintain cache coherency.
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*/
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if (call->server) {
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trace_afs_server(call->server, atomic_read(&call->server->usage),
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afs_server_trace_callback);
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afs_break_callbacks(call->server, call->count, call->request);
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}
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afs_send_empty_reply(call);
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afs_put_call(call);
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_leave("");
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}
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/*
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* deliver request data to a CB.CallBack call
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*/
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static int afs_deliver_cb_callback(struct afs_call *call)
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{
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struct afs_callback_break *cb;
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__be32 *bp;
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int ret, loop;
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_enter("{%u}", call->unmarshall);
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switch (call->unmarshall) {
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case 0:
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afs_extract_to_tmp(call);
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call->unmarshall++;
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/* extract the FID array and its count in two steps */
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/* fall through */
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case 1:
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_debug("extract FID count");
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ret = afs_extract_data(call, true);
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if (ret < 0)
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return ret;
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call->count = ntohl(call->tmp);
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_debug("FID count: %u", call->count);
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if (call->count > AFSCBMAX)
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return afs_protocol_error(call, -EBADMSG,
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afs_eproto_cb_fid_count);
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call->buffer = kmalloc(array3_size(call->count, 3, 4),
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GFP_KERNEL);
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if (!call->buffer)
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return -ENOMEM;
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afs_extract_to_buf(call, call->count * 3 * 4);
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call->unmarshall++;
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/* Fall through */
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case 2:
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_debug("extract FID array");
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ret = afs_extract_data(call, true);
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if (ret < 0)
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return ret;
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_debug("unmarshall FID array");
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call->request = kcalloc(call->count,
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sizeof(struct afs_callback_break),
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GFP_KERNEL);
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if (!call->request)
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return -ENOMEM;
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cb = call->request;
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bp = call->buffer;
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for (loop = call->count; loop > 0; loop--, cb++) {
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cb->fid.vid = ntohl(*bp++);
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cb->fid.vnode = ntohl(*bp++);
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cb->fid.unique = ntohl(*bp++);
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}
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afs_extract_to_tmp(call);
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call->unmarshall++;
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/* extract the callback array and its count in two steps */
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/* fall through */
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case 3:
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_debug("extract CB count");
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ret = afs_extract_data(call, true);
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if (ret < 0)
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return ret;
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call->count2 = ntohl(call->tmp);
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_debug("CB count: %u", call->count2);
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if (call->count2 != call->count && call->count2 != 0)
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return afs_protocol_error(call, -EBADMSG,
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afs_eproto_cb_count);
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call->_iter = &call->iter;
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iov_iter_discard(&call->iter, READ, call->count2 * 3 * 4);
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call->unmarshall++;
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/* Fall through */
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case 4:
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_debug("extract discard %zu/%u",
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iov_iter_count(&call->iter), call->count2 * 3 * 4);
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ret = afs_extract_data(call, false);
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if (ret < 0)
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return ret;
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call->unmarshall++;
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case 5:
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break;
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}
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if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
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return afs_io_error(call, afs_io_error_cm_reply);
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/* we'll need the file server record as that tells us which set of
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* vnodes to operate upon */
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return afs_find_cm_server_by_peer(call);
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}
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/*
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* allow the fileserver to request callback state (re-)initialisation
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*/
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static void SRXAFSCB_InitCallBackState(struct work_struct *work)
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{
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struct afs_call *call = container_of(work, struct afs_call, work);
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_enter("{%p}", call->server);
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if (call->server)
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afs_init_callback_state(call->server);
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afs_send_empty_reply(call);
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afs_put_call(call);
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_leave("");
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}
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/*
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* deliver request data to a CB.InitCallBackState call
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*/
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static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
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{
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int ret;
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_enter("");
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afs_extract_discard(call, 0);
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ret = afs_extract_data(call, false);
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if (ret < 0)
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return ret;
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/* we'll need the file server record as that tells us which set of
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* vnodes to operate upon */
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return afs_find_cm_server_by_peer(call);
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}
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/*
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* deliver request data to a CB.InitCallBackState3 call
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*/
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static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
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{
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struct afs_uuid *r;
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unsigned loop;
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__be32 *b;
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int ret;
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_enter("");
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_enter("{%u}", call->unmarshall);
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switch (call->unmarshall) {
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case 0:
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call->buffer = kmalloc_array(11, sizeof(__be32), GFP_KERNEL);
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if (!call->buffer)
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return -ENOMEM;
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afs_extract_to_buf(call, 11 * sizeof(__be32));
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call->unmarshall++;
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/* Fall through */
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case 1:
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_debug("extract UUID");
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ret = afs_extract_data(call, false);
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switch (ret) {
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case 0: break;
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case -EAGAIN: return 0;
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default: return ret;
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}
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|
_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]);
|
|
|
|
for (loop = 0; loop < 6; loop++)
|
|
r->node[loop] = ntohl(b[loop + 5]);
|
|
|
|
call->unmarshall++;
|
|
|
|
case 2:
|
|
break;
|
|
}
|
|
|
|
if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
|
|
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 */
|
|
return afs_find_cm_server_by_uuid(call, call->request);
|
|
}
|
|
|
|
/*
|
|
* allow the fileserver to see if the cache manager is still alive
|
|
*/
|
|
static void SRXAFSCB_Probe(struct work_struct *work)
|
|
{
|
|
struct afs_call *call = container_of(work, struct afs_call, 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)
|
|
{
|
|
int ret;
|
|
|
|
_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 afs_find_cm_server_by_peer(call);
|
|
}
|
|
|
|
/*
|
|
* allow the fileserver to quickly find out if the fileserver 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, &call->net->uuid, sizeof(call->net->uuid)) == 0)
|
|
reply.match = htonl(0);
|
|
else
|
|
reply.match = htonl(1);
|
|
|
|
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 afs_uuid *r;
|
|
unsigned loop;
|
|
__be32 *b;
|
|
int ret;
|
|
|
|
_enter("{%u}", call->unmarshall);
|
|
|
|
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++;
|
|
|
|
/* Fall through */
|
|
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]);
|
|
|
|
for (loop = 0; loop < 6; loop++)
|
|
r->node[loop] = ntohl(b[loop + 5]);
|
|
|
|
call->unmarshall++;
|
|
|
|
case 2:
|
|
break;
|
|
}
|
|
|
|
if (!afs_check_call_state(call, AFS_CALL_SV_REPLYING))
|
|
return afs_io_error(call, afs_io_error_cm_reply);
|
|
return afs_find_cm_server_by_uuid(call, call->request);
|
|
}
|
|
|
|
/*
|
|
* allow the fileserver to ask about the cache manager's capabilities
|
|
*/
|
|
static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
|
|
{
|
|
struct afs_call *call = container_of(work, struct afs_call, work);
|
|
int loop;
|
|
|
|
struct {
|
|
struct /* InterfaceAddr */ {
|
|
__be32 nifs;
|
|
__be32 uuid[11];
|
|
__be32 ifaddr[32];
|
|
__be32 netmask[32];
|
|
__be32 mtu[32];
|
|
} ia;
|
|
struct /* Capabilities */ {
|
|
__be32 capcount;
|
|
__be32 caps[1];
|
|
} cap;
|
|
} reply;
|
|
|
|
_enter("");
|
|
|
|
memset(&reply, 0, sizeof(reply));
|
|
|
|
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) 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)
|
|
{
|
|
int ret;
|
|
|
|
_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 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 */
|
|
/* Fall through */
|
|
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++;
|
|
|
|
/* Fall through */
|
|
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);
|
|
|
|
/* 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);
|
|
}
|