Viewing: tgt_handler.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2013, 2017, Intel Corporation.
*/
/*
* Lustre Unified Target request handler code
*
* Author: Brian Behlendorf <behlendorf1@llnl.gov>
* Author: Mikhail Pershin <mike.pershin@intel.com>
*/
#define DEBUG_SUBSYSTEM S_CLASS
#include <linux/user_namespace.h>
#include <linux/delay.h>
#include <linux/uidgid.h>
#include <obd.h>
#include <obd_class.h>
#include <obd_cksum.h>
#include <lustre_lfsck.h>
#include <lustre_nodemap.h>
#include <lustre_acl.h>
#include "tgt_internal.h"
char *tgt_name(struct lu_target *tgt)
{
LASSERT(tgt->lut_obd != NULL);
return tgt->lut_obd->obd_name;
}
EXPORT_SYMBOL(tgt_name);
/*
* Generic code handling requests that have struct mdt_body passed in:
*
* - extract mdt_body from request and save it in @tsi, if present;
*
* - create lu_object, corresponding to the fid in mdt_body, and save it in
* @tsi;
*
* - if HAS_BODY flag is set for this request type check whether object
* actually exists on storage (lu_object_exists()).
*
*/
static int tgt_mdt_body_unpack(struct tgt_session_info *tsi, __u32 flags)
{
const struct mdt_body *body;
struct lu_object *obj;
struct req_capsule *pill = tsi->tsi_pill;
int rc;
ENTRY;
body = req_capsule_client_get(pill, &RMF_MDT_BODY);
if (body == NULL)
RETURN(-EFAULT);
tsi->tsi_mdt_body = body;
if (!(body->mbo_valid & OBD_MD_FLID))
RETURN(0);
/* mdc_pack_body() doesn't check if fid is zero and set OBD_ML_FID
* in any case in pre-2.5 clients. Fix that here if needed */
if (unlikely(fid_is_zero(&body->mbo_fid1)))
RETURN(0);
if (!fid_is_sane(&body->mbo_fid1)) {
CERROR("%s: invalid FID: "DFID"\n", tgt_name(tsi->tsi_tgt),
PFID(&body->mbo_fid1));
RETURN(-EINVAL);
}
obj = lu_object_find(tsi->tsi_env,
&tsi->tsi_tgt->lut_bottom->dd_lu_dev,
&body->mbo_fid1, NULL);
if (!IS_ERR(obj)) {
if ((flags & HAS_BODY) && !lu_object_exists(obj)) {
lu_object_put(tsi->tsi_env, obj);
rc = -ENOENT;
} else {
tsi->tsi_corpus = obj;
rc = 0;
}
} else {
rc = PTR_ERR(obj);
}
tsi->tsi_fid = body->mbo_fid1;
RETURN(rc);
}
/**
* tgt_validate_obdo() - Validate oa from client.
* @tsi: current client session
* @oa: obdo struct from client (client-provided object metadata)
*
* If the request comes from 2.0 clients, currently only RSVD seq and IDIF
* req are valid.
* a. objects in Single MDT FS seq = FID_SEQ_OST_MDT0, oi_id != 0
* b. Echo objects(seq = 2), old echo client still use oi_id/oi_seq to
* pack ost_id. Because non-zero oi_seq will make it diffcult to tell
* whether this is oi_fid or real ostid. So it will check
* OBD_CONNECT_FID, then convert the ostid to FID for old client.
* c. Old FID-disable osc will send IDIF.
* d. new FID-enable osc/osp will send normal FID.
*
* And also oi_id/f_oid should always start from 1. oi_id/f_oid = 0 will
* be used for LAST_ID file, and only being accessed inside OST now.
*
* Return:
* * %0 on success
* * %negative on failure
*/
int tgt_validate_obdo(struct tgt_session_info *tsi, struct obdo *oa)
{
struct ost_id *oi = &oa->o_oi;
u64 seq = ostid_seq(oi);
u64 id = ostid_id(oi);
int rc;
ENTRY;
if (unlikely(!(exp_connect_flags(tsi->tsi_exp) & OBD_CONNECT_FID) &&
fid_seq_is_echo(seq))) {
/* Sigh 2.[123] client still sends echo req with oi_id = 0
* during create, and we will reset this to 1, since this
* oi_id is basically useless in the following create process,
* but oi_id == 0 will make it difficult to tell whether it is
* real FID or ost_id. */
oi->oi_fid.f_seq = FID_SEQ_ECHO;
oi->oi_fid.f_oid = id ?: 1;
oi->oi_fid.f_ver = 0;
} else {
struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
if (unlikely((oa->o_valid & OBD_MD_FLID) && id == 0))
GOTO(out, rc = -EPROTO);
/* Note: this check might be forced in 2.5 or 2.6, i.e.
* all of the requests are required to setup FLGROUP */
if (unlikely(!(oa->o_valid & OBD_MD_FLGROUP)))
oa->o_valid |= OBD_MD_FLGROUP;
if (unlikely(!(fid_seq_is_idif(seq) || fid_seq_is_mdt0(seq) ||
fid_seq_is_norm(seq) || fid_seq_is_echo(seq))))
GOTO(out, rc = -EPROTO);
rc = ostid_to_fid(&tti->tti_fid1, oi,
tsi->tsi_tgt->lut_lsd.lsd_osd_index);
if (unlikely(rc != 0))
GOTO(out, rc);
oi->oi_fid = tti->tti_fid1;
}
RETURN(0);
out:
CERROR("%s: client %s sent bad object "DOSTID": rc = %d\n",
tgt_name(tsi->tsi_tgt), obd_export_nid2str(tsi->tsi_exp),
seq, id, rc);
return rc;
}
EXPORT_SYMBOL(tgt_validate_obdo);
static int tgt_io_data_unpack(struct tgt_session_info *tsi, struct ost_id *oi)
{
unsigned int max_brw;
struct niobuf_remote *rnb;
struct obd_ioobj *ioo;
int obj_count;
ENTRY;
ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
if (ioo == NULL)
RETURN(-EPROTO);
rnb = req_capsule_client_get(tsi->tsi_pill, &RMF_NIOBUF_REMOTE);
if (rnb == NULL)
RETURN(-EPROTO);
max_brw = ioobj_max_brw_get(ioo);
if (unlikely((max_brw & (max_brw - 1)) != 0)) {
CERROR("%s: client %s sent bad ioobj max %u for "DOSTID
": rc = %d\n", tgt_name(tsi->tsi_tgt),
obd_export_nid2str(tsi->tsi_exp), max_brw,
POSTID(oi), -EPROTO);
RETURN(-EPROTO);
}
ioo->ioo_oid = *oi;
obj_count = req_capsule_get_size(tsi->tsi_pill, &RMF_OBD_IOOBJ,
RCL_CLIENT) / sizeof(*ioo);
if (obj_count == 0) {
CERROR("%s: short ioobj\n", tgt_name(tsi->tsi_tgt));
RETURN(-EPROTO);
} else if (obj_count > 1) {
CERROR("%s: too many ioobjs (%d)\n", tgt_name(tsi->tsi_tgt),
obj_count);
RETURN(-EPROTO);
}
if (ioo->ioo_bufcnt == 0) {
CERROR("%s: ioo has zero bufcnt\n", tgt_name(tsi->tsi_tgt));
RETURN(-EPROTO);
}
if (ioo->ioo_bufcnt > PTLRPC_MAX_BRW_PAGES) {
DEBUG_REQ(D_RPCTRACE, tgt_ses_req(tsi),
"bulk has too many pages (%d)",
ioo->ioo_bufcnt);
RETURN(-EPROTO);
}
RETURN(0);
}
static int tgt_ost_body_unpack(struct tgt_session_info *tsi, __u32 flags)
{
struct ost_body *body;
struct req_capsule *pill = tsi->tsi_pill;
struct lu_nodemap *nodemap;
int rc;
ENTRY;
body = req_capsule_client_get(pill, &RMF_OST_BODY);
if (body == NULL)
RETURN(-EFAULT);
rc = tgt_validate_obdo(tsi, &body->oa);
if (rc)
RETURN(rc);
nodemap = nodemap_get_from_exp(tsi->tsi_exp);
if (IS_ERR(nodemap))
RETURN(PTR_ERR(nodemap));
body->oa.o_uid = nodemap_map_id(nodemap, NODEMAP_UID,
NODEMAP_CLIENT_TO_FS,
body->oa.o_uid);
body->oa.o_gid = nodemap_map_id(nodemap, NODEMAP_GID,
NODEMAP_CLIENT_TO_FS,
body->oa.o_gid);
body->oa.o_projid = nodemap_map_id(nodemap, NODEMAP_PROJID,
NODEMAP_CLIENT_TO_FS,
body->oa.o_projid);
nodemap_putref(nodemap);
tsi->tsi_ost_body = body;
tsi->tsi_fid = body->oa.o_oi.oi_fid;
if (req_capsule_has_field(pill, &RMF_OBD_IOOBJ, RCL_CLIENT)) {
rc = tgt_io_data_unpack(tsi, &body->oa.o_oi);
if (rc < 0)
RETURN(rc);
}
if (!(body->oa.o_valid & OBD_MD_FLID)) {
if (flags & HAS_BODY) {
CERROR("%s: OBD_MD_FLID flag is not set in ost_body but OID/FID is mandatory with HAS_BODY\n",
tgt_name(tsi->tsi_tgt));
RETURN(-EPROTO);
} else {
RETURN(0);
}
}
ost_fid_build_resid(&tsi->tsi_fid, &tsi->tsi_resid);
/*
* OST doesn't get object in advance for further use to prevent
* situations with nested object_find which is potential deadlock.
*/
tsi->tsi_corpus = NULL;
RETURN(rc);
}
/*
* Do necessary preprocessing according to handler ->th_flags.
*/
static int tgt_request_preprocess(struct tgt_session_info *tsi,
struct tgt_handler *h,
struct ptlrpc_request *req)
{
struct req_capsule *pill = tsi->tsi_pill;
__u32 flags = h->th_flags;
int rc = 0;
ENTRY;
if (tsi->tsi_preprocessed)
RETURN(0);
LASSERT(h->th_act != NULL);
LASSERT(h->th_opc == lustre_msg_get_opc(req->rq_reqmsg));
LASSERT(current->journal_info == NULL);
LASSERT(ergo(flags & (HAS_BODY | HAS_REPLY),
h->th_fmt != NULL));
if (h->th_fmt != NULL) {
req_capsule_set(pill, h->th_fmt);
if (req_capsule_has_field(pill, &RMF_MDT_BODY, RCL_CLIENT) &&
req_capsule_field_present(pill, &RMF_MDT_BODY,
RCL_CLIENT)) {
rc = tgt_mdt_body_unpack(tsi, flags);
if (rc < 0)
RETURN(rc);
} else if (req_capsule_has_field(pill, &RMF_OST_BODY,
RCL_CLIENT) &&
req_capsule_field_present(pill, &RMF_OST_BODY,
RCL_CLIENT)) {
rc = tgt_ost_body_unpack(tsi, flags);
if (rc < 0)
RETURN(rc);
}
}
if (flags & IS_MUTABLE && tgt_conn_flags(tsi) & OBD_CONNECT_RDONLY)
RETURN(-EROFS);
if (flags & HAS_KEY) {
struct ldlm_request *dlm_req;
LASSERT(h->th_fmt != NULL);
dlm_req = req_capsule_client_get(pill, &RMF_DLM_REQ);
if (dlm_req != NULL) {
union ldlm_wire_policy_data *policy =
&dlm_req->lock_desc.l_policy_data;
if (unlikely(dlm_req->lock_desc.l_resource.lr_type ==
LDLM_IBITS &&
(policy->l_inodebits.bits |
policy->l_inodebits.try_bits) ==
MDS_INODELOCK_NONE)) {
/*
* Lock without inodebits makes no sense and
* will oops later in ldlm. If client miss to
* set such bits, do not trigger ASSERTION.
*
* For liblustre flock case, it maybe zero.
*/
rc = -EPROTO;
} else {
tsi->tsi_dlm_req = dlm_req;
}
} else {
rc = -EFAULT;
}
}
tsi->tsi_preprocessed = 1;
RETURN(rc);
}
/*
* Invoke handler for this request opc. Also do necessary preprocessing
* (according to handler ->th_flags), and post-processing (setting of
* ->last_{xid,committed}).
*/
static int tgt_handle_request0(struct tgt_session_info *tsi,
struct tgt_handler *h,
struct ptlrpc_request *req)
{
int serious = 0;
int rc;
__u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
ENTRY;
/* When dealing with sec context requests, no export is associated yet,
* because these requests are sent before *_CONNECT requests.
* A NULL req->rq_export means the normal *_common_slice handlers will
* not be called, because there is no reference to the target.
* So deal with them by hand and jump directly to target_send_reply().
*/
switch (opc) {
case SEC_CTX_INIT:
case SEC_CTX_INIT_CONT:
case SEC_CTX_FINI:
CFS_FAIL_TIMEOUT(OBD_FAIL_SEC_CTX_HDL_PAUSE, cfs_fail_val);
GOTO(out, rc = 0);
}
/*
* Checking for various OBD_FAIL_$PREF_$OPC_NET codes. _Do_ not try
* to put same checks into handlers like mdt_close(), mdt_reint(),
* etc., without talking to mdt authors first. Checking same thing
* there again is useless and returning 0 error without packing reply
* is buggy! Handlers either pack reply or return error.
*
* We return 0 here and do not send any reply in order to emulate
* network failure. Do not send any reply in case any of NET related
* fail_id has occured.
*/
if (CFS_FAIL_CHECK_ORSET(h->th_fail_id, CFS_FAIL_ONCE))
RETURN(0);
if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == MDS_REINT &&
CFS_FAIL_CHECK(OBD_FAIL_MDS_REINT_MULTI_NET)))
RETURN(0);
/* drop OUT_UPDATE rpc */
if (unlikely(lustre_msg_get_opc(req->rq_reqmsg) == OUT_UPDATE &&
CFS_FAIL_CHECK(OBD_FAIL_OUT_UPDATE_DROP)))
RETURN(0);
rc = tgt_request_preprocess(tsi, h, req);
/* pack reply if reply format is fixed */
if (rc == 0 && h->th_flags & HAS_REPLY) {
/* Pack reply */
if (req_capsule_has_field(tsi->tsi_pill, &RMF_MDT_MD,
RCL_SERVER))
req_capsule_set_size(tsi->tsi_pill, &RMF_MDT_MD,
RCL_SERVER,
tsi->tsi_mdt_body->mbo_eadatasize);
if (req_capsule_has_field(tsi->tsi_pill, &RMF_LOGCOOKIES,
RCL_SERVER))
req_capsule_set_size(tsi->tsi_pill, &RMF_LOGCOOKIES,
RCL_SERVER, 0);
if (req_capsule_has_field(tsi->tsi_pill, &RMF_ACL, RCL_SERVER))
req_capsule_set_size(tsi->tsi_pill,
&RMF_ACL, RCL_SERVER,
LUSTRE_POSIX_ACL_MAX_SIZE_OLD);
if (req_capsule_has_field(tsi->tsi_pill, &RMF_SHORT_IO,
RCL_SERVER)) {
struct niobuf_remote *remote_nb =
req_capsule_client_get(tsi->tsi_pill,
&RMF_NIOBUF_REMOTE);
struct ost_body *body = tsi->tsi_ost_body;
req_capsule_set_size(tsi->tsi_pill, &RMF_SHORT_IO,
RCL_SERVER,
(body->oa.o_valid & OBD_MD_FLFLAGS &&
body->oa.o_flags & OBD_FL_SHORT_IO) ?
remote_nb[0].rnb_len : 0);
}
if (req_capsule_has_field(tsi->tsi_pill, &RMF_FILE_ENCCTX,
RCL_SERVER))
req_capsule_set_size(tsi->tsi_pill, &RMF_FILE_ENCCTX,
RCL_SERVER, 0);
if (req_capsule_has_field(tsi->tsi_pill, &RMF_OBD_QUOTA_ITER,
RCL_SERVER)) {
req_capsule_set_size(tsi->tsi_pill,
&RMF_OBD_QUOTA_ITER, RCL_SERVER, 0);
}
rc = req_capsule_server_pack(tsi->tsi_pill);
}
if (likely(rc == 0)) {
/*
* Process request, there can be two types of rc:
* 1) errors with msg unpack/pack, other failures outside the
* operation itself. This is counted as serious errors;
* 2) errors during fs operation, should be placed in rq_status
* only
*/
rc = h->th_act(tsi);
if (!is_serious(rc) &&
!req->rq_no_reply && req->rq_reply_state == NULL) {
DEBUG_REQ(D_ERROR, req,
"%s: %s handler did not pack reply but returned no error",
tgt_name(tsi->tsi_tgt), h->th_name);
LBUG();
}
serious = is_serious(rc);
rc = clear_serious(rc);
} else {
serious = 1;
}
req->rq_status = rc;
/*
* ELDLM_* codes which > 0 should be in rq_status only as well as
* all non-serious errors.
*/
if (rc > 0 || !serious)
rc = 0;
LASSERT(current->journal_info == NULL);
if (likely(rc == 0 && req->rq_export))
target_committed_to_req(req);
out:
target_send_reply(req, rc, tsi->tsi_reply_fail_id);
RETURN(0);
}
static int tgt_filter_recovery_request(struct ptlrpc_request *req,
struct obd_device *obd, int *process)
{
switch (lustre_msg_get_opc(req->rq_reqmsg)) {
case MDS_DISCONNECT:
case OST_DISCONNECT:
case OBD_IDX_READ:
*process = 1;
RETURN(0);
case MDS_CLOSE:
case MDS_SYNC: /* used in unmounting */
case OBD_PING:
case MDS_REINT:
case OUT_UPDATE:
case MDS_BATCH:
case SEQ_QUERY:
case FLD_QUERY:
case FLD_READ:
case LDLM_ENQUEUE:
case OST_CREATE:
case OST_DESTROY:
case OST_PUNCH:
case OST_SETATTR:
case OST_SYNC:
case OST_WRITE:
case MDS_HSM_PROGRESS:
case MDS_HSM_STATE_SET:
case MDS_HSM_REQUEST:
case MDS_HSM_DATA_VERSION:
case OST_FALLOCATE:
*process = target_queue_recovery_request(req, obd);
RETURN(0);
default:
DEBUG_REQ(D_ERROR, req, "not permitted during recovery");
*process = -EAGAIN;
RETURN(0);
}
}
/*
* Handle recovery. Return:
* +1: continue request processing;
* -ve: abort immediately with the given error code;
* 0: send reply with error code in req->rq_status;
*/
static int tgt_handle_recovery(struct ptlrpc_request *req, int reply_fail_id)
{
int rc;
ENTRY;
switch (lustre_msg_get_opc(req->rq_reqmsg)) {
case MDS_CONNECT:
case OST_CONNECT:
case MGS_CONNECT:
case SEC_CTX_INIT:
case SEC_CTX_INIT_CONT:
case SEC_CTX_FINI:
RETURN(+1);
}
if (!test_bit(OBDF_REPLAYABLE, req->rq_export->exp_obd->obd_flags))
RETURN(+1);
/* sanity check: if the xid matches, the request must be marked as a
* resent or replayed */
rc = req_can_reconstruct(req, NULL);
if (rc == 1) {
if (!(lustre_msg_get_flags(req->rq_reqmsg) &
(MSG_RESENT | MSG_REPLAY))) {
DEBUG_REQ(D_WARNING, req,
"rq_xid=%llu matches saved XID, expected REPLAY or RESENT flag (%x)",
req->rq_xid,
lustre_msg_get_flags(req->rq_reqmsg));
req->rq_status = -ENOTCONN;
RETURN(-ENOTCONN);
}
} else if (rc) {
DEBUG_REQ(D_WARNING, req,
"obsoleted, rq_xid=%llu, exp_last_xid=%llu",
req->rq_xid, req->rq_export->exp_last_xid);
req->rq_status = rc;
RETURN(rc);
}
/* else: note the opposite is not always true; a RESENT req after a
* failover will usually not match the last_xid, since it was likely
* never committed. A REPLAYed request will almost never match the
* last xid, however it could for a committed, but still retained,
* open. */
/* Check for aborted recovery... */
if (unlikely(test_bit(OBDF_RECOVERING, req->rq_export->exp_obd->obd_flags))) {
int should_process;
DEBUG_REQ(D_INFO, req, "Got new replay");
rc = tgt_filter_recovery_request(req, req->rq_export->exp_obd,
&should_process);
if (rc != 0 || !should_process)
RETURN(rc);
else if (should_process < 0) {
req->rq_status = should_process;
rc = ptlrpc_error(req);
RETURN(rc);
}
}
RETURN(+1);
}
/* Initial check for request, it is validation mostly */
static struct tgt_handler *tgt_handler_find_check(struct ptlrpc_request *req)
{
struct tgt_handler *h;
struct tgt_opc_slice *s;
struct lu_target *tgt;
__u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
/* don't spew error messages for unhandled RPCs */
static bool printed;
ENTRY;
tgt = class_exp2tgt(req->rq_export);
if (unlikely(tgt == NULL)) {
DEBUG_REQ(D_ERROR, req, "%s: no target for connected export",
class_exp2obd(req->rq_export)->obd_name);
RETURN(ERR_PTR(-EINVAL));
}
for (s = tgt->lut_slice; s->tos_hs != NULL; s++)
if (s->tos_opc_start <= opc && opc < s->tos_opc_end)
break;
/* opcode was not found in slice */
if (unlikely(s->tos_hs == NULL)) {
if (!printed) {
CERROR("%s: no handler for opcode 0x%x from %s\n",
tgt_name(tgt), opc, libcfs_idstr(&req->rq_peer));
printed = true;
}
goto err_unsupported;
}
LASSERT(opc >= s->tos_opc_start && opc < s->tos_opc_end);
h = s->tos_hs + (opc - s->tos_opc_start);
if (unlikely(h->th_opc == 0)) {
if (!printed) {
CERROR("%s: unsupported opcode 0x%x\n",
tgt_name(tgt), opc);
printed = true;
}
goto err_unsupported;
}
if (CFS_FAIL_CHECK(OBD_FAIL_OST_OPCODE) && opc == cfs_fail_val)
goto err_unsupported;
RETURN(h);
err_unsupported:
/*
* Unknown opcode does not necessarily means insane client. A new
* client might send RPCs with new opcodes to an old server. The
* client might desperately stuck there waiting for a reply. So,
* send an error back here.
*
* An old client might also send RPCs with deprecated opcodes (e.g.
* OST_QUOTACHECK).
*
* Error in ptlrpc_send_error() is ignored.
*/
req->rq_status = -EOPNOTSUPP;
ptlrpc_send_error(req, PTLRPC_REPLY_MAYBE_DIFFICULT);
RETURN(ERR_PTR(-EOPNOTSUPP));
}
static int process_req_last_xid(struct ptlrpc_request *req)
{
__u64 last_xid;
int rc = 0;
struct obd_export *exp = req->rq_export;
struct tg_export_data *ted = &exp->exp_target_data;
bool need_lock = tgt_is_multimodrpcs_client(exp);
ENTRY;
if (need_lock)
mutex_lock(&ted->ted_lcd_lock);
/* check request's xid is consistent with export's last_xid */
last_xid = lustre_msg_get_last_xid(req->rq_reqmsg);
if (last_xid > exp->exp_last_xid)
exp->exp_last_xid = last_xid;
if (req->rq_xid == 0 || req->rq_xid <= exp->exp_last_xid) {
/* Some request is allowed to be sent during replay,
* such as OUT update requests, FLD requests, so it
* is possible that replay requests has smaller XID
* than the exp_last_xid.
*
* Some non-replay requests may have smaller XID as
* well:
*
* - Client send a no_resend RPC, like statfs;
* - The RPC timedout (or some other error) on client,
* then it's removed from the unreplied list;
* - Client send some other request to bump the
* exp_last_xid on server;
* - The former RPC got chance to be processed;
*/
if (!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY))
rc = -EPROTO;
DEBUG_REQ(D_WARNING, req,
"unexpected xid=%llx != exp_last_xid=%llx, rc = %d",
req->rq_xid, exp->exp_last_xid, rc);
if (rc)
GOTO(out, rc);
}
/* The "last_xid" is the minimum xid among unreplied requests,
* if the request is from the previous connection, its xid can
* still be larger than "exp_last_xid", then the above check of
* xid is not enough to determine whether the request is delayed.
*
* For example, if some replay request was delayed and caused
* timeout at client and the replay is restarted, the delayed
* replay request will have the larger xid than "exp_last_xid"
*/
if (req->rq_export->exp_conn_cnt >
lustre_msg_get_conn_cnt(req->rq_reqmsg)) {
CDEBUG(D_RPCTRACE,
"Dropping request %llu from an old epoch %u/%u\n",
req->rq_xid,
lustre_msg_get_conn_cnt(req->rq_reqmsg),
req->rq_export->exp_conn_cnt);
req->rq_no_reply = 1;
GOTO(out, rc = -ESTALE);
}
/* try to release in-memory reply data */
if (tgt_is_multimodrpcs_client(exp)) {
tgt_handle_received_xid(exp, last_xid);
rc = tgt_handle_tag(req);
}
out:
if (need_lock)
mutex_unlock(&ted->ted_lcd_lock);
RETURN(rc);
}
int tgt_request_handle(struct ptlrpc_request *req)
{
struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
struct lustre_msg *msg = req->rq_reqmsg;
struct tgt_handler *h;
struct lu_target *tgt;
int request_fail_id = 0;
__u32 opc = lustre_msg_get_opc(msg);
struct obd_device *obd;
int rc;
bool is_connect = false;
ENTRY;
if (unlikely(CFS_FAIL_CHECK(OBD_FAIL_TGT_RECOVERY_REQ_RACE))) {
if (cfs_fail_val == 0 &&
lustre_msg_get_opc(msg) != OBD_PING &&
lustre_msg_get_flags(msg) & MSG_REQ_REPLAY_DONE) {
cfs_fail_val = 1;
cfs_race_state = 0;
wait_event_idle(cfs_race_waitq, (cfs_race_state == 1));
}
}
req_capsule_init(&req->rq_pill, req, RCL_SERVER);
tsi->tsi_pill = &req->rq_pill;
tsi->tsi_env = req->rq_svc_thread->t_env;
/* if request has export then get handlers slice from corresponding
* target, otherwise that should be connect operation */
if (opc == MDS_CONNECT || opc == OST_CONNECT ||
opc == MGS_CONNECT) {
is_connect = true;
req_capsule_set(&req->rq_pill, &RQF_CONNECT);
rc = target_handle_connect(req);
if (rc != 0) {
rc = ptlrpc_error(req);
GOTO(out, rc);
}
/* recovery-small test 18c asks to drop connect reply */
if (unlikely(opc == OST_CONNECT &&
CFS_FAIL_CHECK(OBD_FAIL_OST_CONNECT_NET2)))
GOTO(out, rc = 0);
}
if (unlikely(!class_connected_export(req->rq_export))) {
if (opc == SEC_CTX_INIT || opc == SEC_CTX_INIT_CONT ||
opc == SEC_CTX_FINI) {
/* sec context initialization has to be handled
* by hand in tgt_handle_request0() */
tsi->tsi_reply_fail_id = OBD_FAIL_SEC_CTX_INIT_NET;
h = NULL;
GOTO(handle_recov, rc = 0);
}
CDEBUG(D_HA, "operation %d on unconnected OST from %s\n",
opc, libcfs_idstr(&req->rq_peer));
req->rq_status = -ENOTCONN;
rc = ptlrpc_error(req);
GOTO(out, rc);
}
if (req->rq_export->exp_banned && opc != OBD_PING &&
opc != OST_CONNECT && opc != OST_DISCONNECT &&
opc != MDS_CONNECT && opc != MDS_DISCONNECT &&
opc != MDS_CLOSE && opc != OST_CLOSE) {
struct lu_nodemap *nodemap;
nodemap = nodemap_get_from_exp(req->rq_export);
if (!IS_ERR_OR_NULL(nodemap)) {
LCONSOLE_WARN(
"operation %d from peer %s banned by nodemap %s: rc=%d\n",
opc, libcfs_idstr(&req->rq_peer),
nodemap->nm_name, -EPERM);
nodemap_putref(nodemap);
} else {
LCONSOLE_WARN(
"operation %d from banned peer %s: rc=%d\n",
opc, libcfs_idstr(&req->rq_peer),
-EPERM);
}
req->rq_status = -EPERM;
rc = ptlrpc_error(req);
GOTO(out, rc);
}
tsi->tsi_tgt = tgt = class_exp2tgt(req->rq_export);
tsi->tsi_exp = req->rq_export;
if (exp_connect_flags(req->rq_export) & OBD_CONNECT_JOBSTATS)
tsi->tsi_jobid = lustre_msg_get_jobid(req->rq_reqmsg);
else
tsi->tsi_jobid = NULL;
if (tgt == NULL) {
DEBUG_REQ(D_ERROR, req, "%s: No target for connected export",
class_exp2obd(req->rq_export)->obd_name);
req->rq_status = -EINVAL;
rc = ptlrpc_error(req);
GOTO(out, rc);
}
/* Skip last_xid processing for the recovery thread, otherwise, the
* last_xid on same request could be processed twice: first time when
* processing the incoming request, second time when the request is
* being processed by recovery thread. */
obd = class_exp2obd(req->rq_export);
if (is_connect) {
/* reset the exp_last_xid on each connection. */
req->rq_export->exp_last_xid = 0;
} else if (obd->obd_recovery_data.trd_processing_task !=
current->pid) {
rc = process_req_last_xid(req);
if (rc) {
req->rq_status = rc;
rc = ptlrpc_error(req);
GOTO(out, rc);
}
}
request_fail_id = tgt->lut_request_fail_id;
tsi->tsi_reply_fail_id = tgt->lut_reply_fail_id;
h = tgt_handler_find_check(req);
if (IS_ERR(h)) {
req->rq_status = PTR_ERR(h);
rc = ptlrpc_error(req);
GOTO(out, rc);
}
LASSERTF(h->th_opc == opc, "opcode mismatch %d != %d\n",
h->th_opc, opc);
if ((cfs_fail_val == 0 || cfs_fail_val == opc) &&
CFS_FAIL_CHECK_ORSET(request_fail_id, CFS_FAIL_ONCE))
GOTO(out, rc = 0);
rc = lustre_msg_check_version(msg, h->th_version);
if (unlikely(rc)) {
DEBUG_REQ(D_ERROR, req,
"%s: drop malformed request version=%08x expect=%08x",
tgt_name(tgt), lustre_msg_get_version(msg),
h->th_version);
req->rq_status = -EINVAL;
rc = ptlrpc_error(req);
GOTO(out, rc);
}
handle_recov:
rc = tgt_handle_recovery(req, tsi->tsi_reply_fail_id);
if (likely(rc == 1)) {
rc = tgt_handle_request0(tsi, h, req);
if (rc)
GOTO(out, rc);
}
EXIT;
out:
req_capsule_fini(tsi->tsi_pill);
if (tsi->tsi_corpus != NULL) {
lu_object_put(tsi->tsi_env, tsi->tsi_corpus);
tsi->tsi_corpus = NULL;
}
return rc;
}
EXPORT_SYMBOL(tgt_request_handle);
/** Assign high priority operations to the request if needed. */
int tgt_hpreq_handler(struct ptlrpc_request *req)
{
struct tgt_session_info *tsi = tgt_ses_info(req->rq_svc_thread->t_env);
struct tgt_handler *h;
int rc;
ENTRY;
if (req->rq_export == NULL)
RETURN(0);
req_capsule_init(&req->rq_pill, req, RCL_SERVER);
tsi->tsi_pill = &req->rq_pill;
tsi->tsi_env = req->rq_svc_thread->t_env;
tsi->tsi_tgt = class_exp2tgt(req->rq_export);
tsi->tsi_exp = req->rq_export;
h = tgt_handler_find_check(req);
if (IS_ERR(h)) {
rc = PTR_ERR(h);
RETURN(rc);
}
rc = tgt_request_preprocess(tsi, h, req);
if (unlikely(rc != 0))
RETURN(rc);
if (h->th_hp != NULL)
h->th_hp(tsi);
RETURN(0);
}
EXPORT_SYMBOL(tgt_hpreq_handler);
void tgt_counter_incr(struct obd_export *exp, int opcode)
{
lprocfs_counter_incr(exp->exp_obd->obd_stats, opcode);
if (exp->exp_nid_stats && exp->exp_nid_stats->nid_stats != NULL)
lprocfs_counter_incr(exp->exp_nid_stats->nid_stats, opcode);
}
EXPORT_SYMBOL(tgt_counter_incr);
/*
* Unified target generic handlers.
*/
int tgt_connect_check_sptlrpc(struct ptlrpc_request *req, struct obd_export *exp)
{
struct lu_target *tgt = class_exp2tgt(exp);
struct sptlrpc_flavor flvr;
int rc = 0;
LASSERT(tgt);
LASSERT(tgt->lut_obd);
LASSERT(tgt->lut_slice);
/* always allow ECHO client */
if (unlikely(strcmp(exp->exp_obd->obd_type->typ_name,
LUSTRE_ECHO_NAME) == 0)) {
exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
return 0;
}
if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
read_lock(&tgt->lut_sptlrpc_lock);
sptlrpc_target_choose_flavor(&tgt->lut_sptlrpc_rset,
req->rq_sp_from,
&req->rq_peer.nid,
&flvr);
read_unlock(&tgt->lut_sptlrpc_lock);
spin_lock(&exp->exp_lock);
exp->exp_sp_peer = req->rq_sp_from;
exp->exp_flvr = flvr;
/* when on mgs, if no restriction is set, or if the client
* NID is on the local node, allow any flavor
*/
if ((strcmp(exp->exp_obd->obd_type->typ_name,
LUSTRE_MGS_NAME) == 0) &&
(exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_NULL ||
(exp->exp_connection &&
LNetIsPeerLocal(&exp->exp_connection->c_peer.nid))))
exp->exp_flvr.sf_rpc = SPTLRPC_FLVR_ANY;
if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
CERROR("%s: unauthorized rpc flavor %x from %s, expect %x\n",
tgt_name(tgt),
req->rq_flvr.sf_rpc,
libcfs_nidstr(&req->rq_peer.nid),
exp->exp_flvr.sf_rpc);
rc = -EACCES;
}
spin_unlock(&exp->exp_lock);
} else {
if (exp->exp_sp_peer != req->rq_sp_from) {
CERROR("%s: RPC source %s doesn't match %s\n",
tgt_name(tgt),
sptlrpc_part2name(req->rq_sp_from),
sptlrpc_part2name(exp->exp_sp_peer));
rc = -EACCES;
} else {
rc = sptlrpc_target_export_check(exp, req);
}
}
return rc;
}
int tgt_adapt_sptlrpc_conf(struct lu_target *tgt)
{
struct sptlrpc_rule_set tmp_rset;
int rc;
if (unlikely(tgt == NULL)) {
CERROR("No target passed\n");
return -EINVAL;
}
sptlrpc_rule_set_init(&tmp_rset);
rc = sptlrpc_conf_target_get_rules(tgt->lut_obd, &tmp_rset);
if (rc) {
CERROR("%s: failed get sptlrpc rules: rc = %d\n",
tgt_name(tgt), rc);
return rc;
}
sptlrpc_target_update_exp_flavor(tgt->lut_obd, &tmp_rset);
write_lock(&tgt->lut_sptlrpc_lock);
sptlrpc_rule_set_free(&tgt->lut_sptlrpc_rset);
tgt->lut_sptlrpc_rset = tmp_rset;
write_unlock(&tgt->lut_sptlrpc_lock);
return 0;
}
EXPORT_SYMBOL(tgt_adapt_sptlrpc_conf);
int tgt_connect(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct obd_connect_data *reply;
int rc;
ENTRY;
/* XXX: better to call this check right after getting new export but
* before last_rcvd slot allocation to avoid server load upon insecure
* connects. This is to be fixed after unifiyng all targets.
*/
rc = tgt_connect_check_sptlrpc(req, tsi->tsi_exp);
if (rc)
GOTO(out, rc);
/* To avoid exposing partially initialized connection flags, changes up
* to this point have been staged in reply->ocd_connect_flags. Now that
* connection handling has completed successfully, atomically update
* the connect flags in the shared export data structure. LU-1623 */
reply = req_capsule_server_get(tsi->tsi_pill, &RMF_CONNECT_DATA);
spin_lock(&tsi->tsi_exp->exp_lock);
*exp_connect_flags_ptr(tsi->tsi_exp) = reply->ocd_connect_flags;
if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2)
*exp_connect_flags2_ptr(tsi->tsi_exp) =
reply->ocd_connect_flags2;
tsi->tsi_exp->exp_connect_data.ocd_brw_size = reply->ocd_brw_size;
spin_unlock(&tsi->tsi_exp->exp_lock);
if (strcmp(tsi->tsi_exp->exp_obd->obd_type->typ_name,
LUSTRE_MDT_NAME) == 0) {
struct lu_nodemap *nm = NULL;
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_CONNECT_ACCESS))
GOTO(out, rc = -EACCES);
rc = req_check_sepol(tsi->tsi_pill);
if (rc)
GOTO(out, rc);
if (tsi->tsi_pill->rc_req->rq_export)
nm =
nodemap_get_from_exp(tsi->tsi_pill->rc_req->rq_export);
if (reply->ocd_connect_flags & OBD_CONNECT_FLAGS2 &&
reply->ocd_connect_flags2 & OBD_CONNECT2_ENCRYPT) {
bool forbid_encrypt = true;
if (!nm)
/* nodemap_get_from_exp returns NULL in case
* nodemap is not active, so we do not forbid
*/
forbid_encrypt = false;
else if (!IS_ERR(nm))
forbid_encrypt = nm->nmf_forbid_encryption;
if (forbid_encrypt)
GOTO(put_nm, rc = -EACCES);
}
if (!(reply->ocd_connect_flags & OBD_CONNECT_RDONLY)) {
bool readonly = false;
if (!IS_ERR_OR_NULL(nm))
readonly = nm->nmf_readonly_mount;
if (unlikely(readonly))
GOTO(put_nm, rc = -EROFS);
}
put_nm:
if (!IS_ERR_OR_NULL(nm))
nodemap_putref(nm);
if (rc)
GOTO(out, rc);
}
RETURN(0);
out:
obd_disconnect(class_export_get(tsi->tsi_exp));
return rc;
}
EXPORT_SYMBOL(tgt_connect);
int tgt_disconnect(struct tgt_session_info *tsi)
{
int rc;
ENTRY;
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_DISCONNECT_DELAY, cfs_fail_val);
rc = target_handle_disconnect(tgt_ses_req(tsi));
if (rc)
RETURN(err_serious(rc));
RETURN(rc);
}
EXPORT_SYMBOL(tgt_disconnect);
/*
* Unified target OBD handlers
*/
int tgt_obd_ping(struct tgt_session_info *tsi)
{
int rc;
ENTRY;
/* The target-specific part of OBD_PING request handling.
* It controls Filter Modification Data (FMD) expiration each time
* PING is received.
*
* Valid only for replayable targets, e.g. MDT and OFD
*/
if (test_bit(OBDF_REPLAYABLE, tsi->tsi_exp->exp_obd->obd_flags))
tgt_fmd_expire(tsi->tsi_exp);
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
RETURN(err_serious(rc));
if (CFS_FAIL_CHECK(OBD_FAIL_MDS_CONNECT_VS_EVICT)) {
if (strstr(tsi->tsi_exp->exp_obd->obd_name, "MDT0000") &&
(exp_connect_flags(tsi->tsi_exp) & OBD_CONNECT_MDS_MDS))
tsi->tsi_pill->rc_req->rq_no_reply = 1;
}
RETURN(rc);
}
EXPORT_SYMBOL(tgt_obd_ping);
int tgt_send_buffer(struct tgt_session_info *tsi, struct lu_rdbuf *rdbuf)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct obd_export *exp = req->rq_export;
struct ptlrpc_bulk_desc *desc;
int i;
int rc;
int pages = 0;
ENTRY;
for (i = 0; i < rdbuf->rb_nbufs; i++) {
unsigned int offset;
offset = (unsigned long)rdbuf->rb_bufs[i].lb_buf & ~PAGE_MASK;
pages += DIV_ROUND_UP(rdbuf->rb_bufs[i].lb_len + offset,
PAGE_SIZE);
}
desc = ptlrpc_prep_bulk_exp(req, pages, 1,
PTLRPC_BULK_PUT_SOURCE,
MDS_BULK_PORTAL,
&ptlrpc_bulk_kiov_nopin_ops);
if (desc == NULL)
RETURN(-ENOMEM);
for (i = 0; i < rdbuf->rb_nbufs; i++)
desc->bd_frag_ops->add_iov_frag(desc,
rdbuf->rb_bufs[i].lb_buf,
rdbuf->rb_bufs[i].lb_len);
rc = target_bulk_io(exp, desc);
ptlrpc_free_bulk(desc);
RETURN(rc);
}
EXPORT_SYMBOL(tgt_send_buffer);
int tgt_sendpage(struct tgt_session_info *tsi, struct lu_rdpg *rdpg, int nob)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct obd_export *exp = req->rq_export;
struct ptlrpc_bulk_desc *desc;
int tmpcount;
int tmpsize;
int i;
int rc;
ENTRY;
desc = ptlrpc_prep_bulk_exp(req, rdpg->rp_npages, 1,
PTLRPC_BULK_PUT_SOURCE,
MDS_BULK_PORTAL,
&ptlrpc_bulk_kiov_pin_ops);
if (desc == NULL)
RETURN(-ENOMEM);
if (!(exp_connect_flags(exp) & OBD_CONNECT_BRW_SIZE))
/* old client requires reply size in it's PAGE_SIZE,
* which is rdpg->rp_count */
nob = rdpg->rp_count;
for (i = 0, tmpcount = nob; i < rdpg->rp_npages && tmpcount > 0;
i++, tmpcount -= tmpsize) {
tmpsize = min_t(int, tmpcount, PAGE_SIZE);
desc->bd_frag_ops->add_kiov_frag(desc,
folio_page(rdpg->rp_folios[i], 0), 0,
tmpsize);
}
LASSERT(desc->bd_nob == nob);
rc = target_bulk_io(exp, desc);
ptlrpc_free_bulk(desc);
RETURN(rc);
}
EXPORT_SYMBOL(tgt_sendpage);
/*
* OBD_IDX_READ handler
*/
static int tgt_obd_idx_read(struct tgt_session_info *tsi)
{
struct tgt_thread_info *tti = tgt_th_info(tsi->tsi_env);
struct lu_rdpg *rdpg = &tti->tti_u.rdpg.tti_rdpg;
struct idx_info *req_ii, *rep_ii;
int rc, i;
ENTRY;
memset(rdpg, 0, sizeof(*rdpg));
req_capsule_set(tsi->tsi_pill, &RQF_OBD_IDX_READ);
/* extract idx_info buffer from request & reply */
req_ii = req_capsule_client_get(tsi->tsi_pill, &RMF_IDX_INFO);
if (req_ii == NULL || req_ii->ii_magic != IDX_INFO_MAGIC)
RETURN(err_serious(-EPROTO));
rc = req_capsule_server_pack(tsi->tsi_pill);
if (rc)
RETURN(err_serious(rc));
rep_ii = req_capsule_server_get(tsi->tsi_pill, &RMF_IDX_INFO);
if (rep_ii == NULL)
RETURN(err_serious(-EFAULT));
rep_ii->ii_magic = IDX_INFO_MAGIC;
/* extract hash to start with */
rdpg->rp_hash = req_ii->ii_hash_start;
/* extract requested attributes */
rdpg->rp_attrs = req_ii->ii_attrs;
/* check that fid packed in request is valid and supported */
if (!fid_is_sane(&req_ii->ii_fid))
RETURN(-EINVAL);
rep_ii->ii_fid = req_ii->ii_fid;
/* copy flags */
rep_ii->ii_flags = req_ii->ii_flags;
/* compute number of pages to allocate, ii_count is the number of 4KB
* containers */
if (req_ii->ii_count <= 0)
GOTO(out, rc = -EFAULT);
rdpg->rp_count = min_t(unsigned int, req_ii->ii_count << LU_PAGE_SHIFT,
exp_max_brw_size(tsi->tsi_exp));
rdpg->rp_npages = (rdpg->rp_count + PAGE_SIZE - 1) >> PAGE_SHIFT;
/* allocate pages to store the containers */
OBD_ALLOC_PTR_ARRAY(rdpg->rp_folios, rdpg->rp_npages);
if (rdpg->rp_folios == NULL)
GOTO(out, rc = -ENOMEM);
for (i = 0; i < rdpg->rp_npages; i++) {
rdpg->rp_folios[i] = folio_alloc(GFP_NOFS, 0);
if (IS_ERR_OR_NULL(rdpg->rp_folios[i])) {
rdpg->rp_folios[i] = NULL;
GOTO(out, rc = -ENOMEM);
}
}
/* populate pages with key/record pairs */
rc = dt_index_read(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, rep_ii, rdpg);
if (rc < 0)
GOTO(out, rc);
LASSERTF(rc <= rdpg->rp_count, "dt_index_read() returned more than asked %d > %d\n",
rc, rdpg->rp_count);
/* send pages to client */
rc = tgt_sendpage(tsi, rdpg, rc);
if (rc)
GOTO(out, rc);
EXIT;
out:
if (rdpg->rp_folios) {
for (i = 0; i < rdpg->rp_npages; i++)
if (rdpg->rp_folios[i])
folio_put(rdpg->rp_folios[i]);
OBD_FREE_PTR_ARRAY(rdpg->rp_folios, rdpg->rp_npages);
}
return rc;
}
struct tgt_handler tgt_obd_handlers[] = {
TGT_OBD_HDL(0, OBD_PING, tgt_obd_ping),
TGT_OBD_HDL(0, OBD_IDX_READ, tgt_obd_idx_read)
};
EXPORT_SYMBOL(tgt_obd_handlers);
int tgt_sync(const struct lu_env *env, struct lu_target *tgt,
struct dt_object *obj, __u64 start, __u64 end)
{
int rc = 0;
ENTRY;
/* if no objid is specified, it means "sync whole filesystem" */
if (obj == NULL) {
lu_objects_destroy_delayed();
rc = dt_sync(env, tgt->lut_bottom);
} else if (dt_version_get(env, obj) >
tgt->lut_obd->obd_last_committed) {
rc = dt_object_sync(env, obj, start, end);
}
atomic_inc(&tgt->lut_sync_count);
RETURN(rc);
}
EXPORT_SYMBOL(tgt_sync);
/*
* Unified target DLM handlers.
*/
/**
* tgt_blocking_ast() - Unified target BAST
* @lock: server side lock
* @desc: lock desc
* @data: ldlm_cb_set_arg
* @flag: indicates whether this cancelling or blocking callback
*
* Ensure data and metadata are synced to disk when lock is canceled if Sync on
* Cancel (SOC) is enabled. If it's extent lock, normally sync obj is enough,
* but if it's cross-MDT lock, because remote object version is not set, a
* filesystem sync is needed.
*
* Return:
* * %0 on success
* * %negative number on error
*/
int tgt_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
void *data, int flag)
{
struct lu_env env;
struct lu_target *tgt;
struct dt_object *obj = NULL;
struct lu_fid fid;
int rc = 0;
ENTRY;
tgt = class_exp2tgt(lock->l_export);
if (unlikely(tgt == NULL)) {
CDEBUG(D_ERROR, "%s: No target for connected export\n",
class_exp2obd(lock->l_export)->obd_name);
RETURN(-EINVAL);
}
if (flag == LDLM_CB_CANCELING &&
(lock->l_granted_mode & (LCK_EX | LCK_PW | LCK_GROUP)) &&
(tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_ALWAYS ||
(tgt->lut_sync_lock_cancel == SYNC_LOCK_CANCEL_BLOCKING &&
(lock->l_flags & LDLM_FL_CBPENDING))) &&
((exp_connect_flags(lock->l_export) & OBD_CONNECT_MDS_MDS) ||
lock->l_resource->lr_type == LDLM_EXTENT)) {
__u64 start = 0;
__u64 end = OBD_OBJECT_EOF;
rc = lu_env_init(&env, LCT_DT_THREAD);
if (unlikely(rc != 0))
GOTO(err, rc);
ost_fid_from_resid(&fid, &lock->l_resource->lr_name,
tgt->lut_lsd.lsd_osd_index);
if (lock->l_resource->lr_type == LDLM_EXTENT) {
obj = dt_locate(&env, tgt->lut_bottom, &fid);
if (IS_ERR(obj))
GOTO(err_env, rc = PTR_ERR(obj));
if (!dt_object_exists(obj))
GOTO(err_put, rc = -ENOENT);
start = lock->l_policy_data.l_extent.start;
end = lock->l_policy_data.l_extent.end;
}
rc = tgt_sync(&env, tgt, obj, start, end);
if (rc < 0) {
CERROR("%s: syncing "DFID" (%llu-%llu) on lock cancel: rc = %d\n",
tgt_name(tgt), PFID(&fid),
lock->l_policy_data.l_extent.start,
lock->l_policy_data.l_extent.end, rc);
}
err_put:
if (obj != NULL)
dt_object_put(&env, obj);
err_env:
lu_env_fini(&env);
}
err:
rc = ldlm_server_blocking_ast(lock, desc, data, flag);
RETURN(rc);
}
EXPORT_SYMBOL(tgt_blocking_ast);
static struct ldlm_callback_suite tgt_dlm_cbs = {
.lcs_completion = ldlm_server_completion_ast,
.lcs_blocking = tgt_blocking_ast,
.lcs_glimpse = ldlm_server_glimpse_ast
};
int tgt_enqueue(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
int rc;
ENTRY;
/*
* tsi->tsi_dlm_req was already swapped and (if necessary) converted,
* tsi->tsi_dlm_cbs was set by the *_req_handle() function.
*/
LASSERT(tsi->tsi_dlm_req != NULL);
rc = ldlm_handle_enqueue(tsi->tsi_exp->exp_obd->obd_namespace,
&req->rq_pill, tsi->tsi_dlm_req, &tgt_dlm_cbs);
if (rc)
RETURN(err_serious(rc));
switch (LUT_FAIL_CLASS(tsi->tsi_reply_fail_id)) {
case LUT_FAIL_MDT:
tsi->tsi_reply_fail_id = OBD_FAIL_MDS_LDLM_REPLY_NET;
break;
case LUT_FAIL_OST:
tsi->tsi_reply_fail_id = OBD_FAIL_OST_LDLM_REPLY_NET;
break;
case LUT_FAIL_MGT:
tsi->tsi_reply_fail_id = OBD_FAIL_MGS_LDLM_REPLY_NET;
break;
default:
tsi->tsi_reply_fail_id = OBD_FAIL_LDLM_REPLY;
break;
}
RETURN(req->rq_status);
}
EXPORT_SYMBOL(tgt_enqueue);
int tgt_convert(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
int rc;
ENTRY;
LASSERT(tsi->tsi_dlm_req);
rc = ldlm_handle_convert0(req, tsi->tsi_dlm_req);
if (rc)
RETURN(err_serious(rc));
RETURN(req->rq_status);
}
int tgt_bl_callback(struct tgt_session_info *tsi)
{
return err_serious(-EOPNOTSUPP);
}
int tgt_cp_callback(struct tgt_session_info *tsi)
{
return err_serious(-EOPNOTSUPP);
}
/* generic LDLM target handler */
struct tgt_handler tgt_dlm_handlers[] = {
TGT_DLM_HDL(HAS_KEY, LDLM_ENQUEUE, tgt_enqueue),
TGT_DLM_HDL(HAS_KEY, LDLM_CONVERT, tgt_convert),
TGT_DLM_HDL_VAR(0, LDLM_BL_CALLBACK, tgt_bl_callback),
TGT_DLM_HDL_VAR(0, LDLM_CP_CALLBACK, tgt_cp_callback)
};
EXPORT_SYMBOL(tgt_dlm_handlers);
/*
* Unified target LLOG handlers.
*/
int tgt_llog_open(struct tgt_session_info *tsi)
{
int rc;
ENTRY;
rc = llog_origin_handle_open(tgt_ses_req(tsi));
RETURN(rc);
}
EXPORT_SYMBOL(tgt_llog_open);
int tgt_llog_read_header(struct tgt_session_info *tsi)
{
int rc;
ENTRY;
rc = llog_origin_handle_read_header(tgt_ses_req(tsi));
RETURN(rc);
}
EXPORT_SYMBOL(tgt_llog_read_header);
int tgt_llog_next_block(struct tgt_session_info *tsi)
{
int rc;
ENTRY;
rc = llog_origin_handle_next_block(tgt_ses_req(tsi));
RETURN(rc);
}
EXPORT_SYMBOL(tgt_llog_next_block);
int tgt_llog_prev_block(struct tgt_session_info *tsi)
{
int rc;
ENTRY;
rc = llog_origin_handle_prev_block(tgt_ses_req(tsi));
RETURN(rc);
}
EXPORT_SYMBOL(tgt_llog_prev_block);
/* generic llog target handler */
struct tgt_handler tgt_llog_handlers[] = {
TGT_LLOG_HDL(0, LLOG_ORIGIN_HANDLE_CREATE, tgt_llog_open),
TGT_LLOG_HDL(0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
TGT_LLOG_HDL(0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
TGT_LLOG_HDL(0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
};
EXPORT_SYMBOL(tgt_llog_handlers);
/*
* sec context handlers
*/
/* XXX: Implement based on mdt_sec_ctx_handle()? */
static int tgt_sec_ctx_handle(struct tgt_session_info *tsi)
{
return 0;
}
struct tgt_handler tgt_sec_ctx_handlers[] = {
TGT_SEC_HDL_VAR(0, SEC_CTX_INIT, tgt_sec_ctx_handle),
TGT_SEC_HDL_VAR(0, SEC_CTX_INIT_CONT, tgt_sec_ctx_handle),
TGT_SEC_HDL_VAR(0, SEC_CTX_FINI, tgt_sec_ctx_handle),
};
EXPORT_SYMBOL(tgt_sec_ctx_handlers);
int (*tgt_lfsck_in_notify_local)(const struct lu_env *env,
struct dt_device *key,
struct lfsck_req_local *lrl,
struct thandle *th) = NULL;
void tgt_register_lfsck_in_notify_local(int (*notify)(const struct lu_env *,
struct dt_device *,
struct lfsck_req_local *,
struct thandle *))
{
tgt_lfsck_in_notify_local = notify;
}
EXPORT_SYMBOL(tgt_register_lfsck_in_notify_local);
static int (*tgt_lfsck_in_notify)(const struct lu_env *env,
struct dt_device *key,
struct lfsck_request *lr) = NULL;
void tgt_register_lfsck_in_notify(int (*notify)(const struct lu_env *,
struct dt_device *,
struct lfsck_request *))
{
tgt_lfsck_in_notify = notify;
}
EXPORT_SYMBOL(tgt_register_lfsck_in_notify);
static int (*tgt_lfsck_query)(const struct lu_env *env,
struct dt_device *key,
struct lfsck_request *req,
struct lfsck_reply *rep,
struct lfsck_query *que) = NULL;
void tgt_register_lfsck_query(int (*query)(const struct lu_env *,
struct dt_device *,
struct lfsck_request *,
struct lfsck_reply *,
struct lfsck_query *))
{
tgt_lfsck_query = query;
}
EXPORT_SYMBOL(tgt_register_lfsck_query);
/* LFSCK request handlers */
static int tgt_handle_lfsck_notify(struct tgt_session_info *tsi)
{
const struct lu_env *env = tsi->tsi_env;
struct dt_device *key = tsi->tsi_tgt->lut_bottom;
struct lfsck_request *lr;
int rc;
ENTRY;
lr = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
if (lr == NULL)
RETURN(-EPROTO);
rc = tgt_lfsck_in_notify(env, key, lr);
RETURN(rc);
}
static int tgt_handle_lfsck_query(struct tgt_session_info *tsi)
{
struct lfsck_request *request;
struct lfsck_reply *reply;
int rc;
ENTRY;
request = req_capsule_client_get(tsi->tsi_pill, &RMF_LFSCK_REQUEST);
if (request == NULL)
RETURN(-EPROTO);
reply = req_capsule_server_get(tsi->tsi_pill, &RMF_LFSCK_REPLY);
if (reply == NULL)
RETURN(-ENOMEM);
rc = tgt_lfsck_query(tsi->tsi_env, tsi->tsi_tgt->lut_bottom,
request, reply, NULL);
RETURN(rc < 0 ? rc : 0);
}
struct tgt_handler tgt_lfsck_handlers[] = {
TGT_LFSCK_HDL(HAS_REPLY, LFSCK_NOTIFY, tgt_handle_lfsck_notify),
TGT_LFSCK_HDL(HAS_REPLY, LFSCK_QUERY, tgt_handle_lfsck_query),
};
EXPORT_SYMBOL(tgt_lfsck_handlers);
/*
* initialize per-thread page pool (bug 5137).
*/
int tgt_io_thread_init(struct ptlrpc_thread *thread)
{
struct tgt_thread_big_cache *tbc;
ENTRY;
LASSERT(thread != NULL);
LASSERT(thread->t_data == NULL);
OBD_ALLOC_LARGE(tbc, sizeof(*tbc));
if (tbc == NULL)
RETURN(-ENOMEM);
thread->t_data = tbc;
RETURN(0);
}
EXPORT_SYMBOL(tgt_io_thread_init);
/*
* free per-thread pool created by tgt_thread_init().
*/
void tgt_io_thread_done(struct ptlrpc_thread *thread)
{
struct tgt_thread_big_cache *tbc;
ENTRY;
LASSERT(thread != NULL);
/*
* be prepared to handle partially-initialized pools (because this is
* called from ost_io_thread_init() for cleanup.
*/
tbc = thread->t_data;
if (tbc != NULL) {
OBD_FREE_LARGE(tbc, sizeof(*tbc));
thread->t_data = NULL;
}
EXIT;
}
EXPORT_SYMBOL(tgt_io_thread_done);
/**
* tgt_mdt_data_lock() - Get Data-on-MDT file server DLM lock
* @ns: LDLM namespace
* @res_id: The resource name for the DLM request
* @lh: Pointer to lustre_handle (to uniquely identify lock)
* @mode: lock types
* @flags: flags sent on wire on ldlm requests
*
* Helper function for getting Data-on-MDT file server DLM lock
* if asked by client.
*
* Return:
* * %0 on success
* * %negative on failure
*/
int tgt_mdt_data_lock(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
struct lustre_handle *lh, int mode, __u64 *flags)
{
union ldlm_policy_data policy = {
.l_inodebits.bits = MDS_INODELOCK_DOM,
};
int rc;
ENTRY;
LASSERT(lh != NULL);
LASSERT(ns != NULL);
LASSERT(!lustre_handle_is_used(lh));
rc = ldlm_cli_enqueue_local(NULL, ns, res_id, LDLM_IBITS, &policy, mode,
flags, ldlm_blocking_ast,
ldlm_completion_ast, ldlm_glimpse_ast,
NULL, 0, LVB_T_NONE, NULL, lh);
RETURN(rc == ELDLM_OK ? 0 : -EIO);
}
EXPORT_SYMBOL(tgt_mdt_data_lock);
/**
* tgt_extent_lock() - Helper function for getting server side
* [start, start+count] DLM lock if asked by client.
* @env: Lustre environment
* @ns: LDLM namespace
* @res_id: The resource name for the DLM request
* @start: Start server side DLM lock
* @end: Number of Lock Count
* @lh: Pointer to lustre_handle (to uniquely identify lock)
* @mode: lock types
* @flags: flags sent on wire on ldlm requests
*
* Helper function for getting server side [start, start+count] DLM lock
* if asked by client.
*
* Return:
* * %0 on success
* * %negative on failure
*/
int tgt_extent_lock(const struct lu_env *env, struct ldlm_namespace *ns,
struct ldlm_res_id *res_id, __u64 start, __u64 end,
struct lustre_handle *lh, int mode, __u64 *flags)
{
union ldlm_policy_data policy;
int rc;
ENTRY;
LASSERT(lh != NULL);
LASSERT(ns != NULL);
LASSERT(!lustre_handle_is_used(lh));
policy.l_extent.gid = 0;
policy.l_extent.start = start & PAGE_MASK;
/*
* If ->o_blocks is EOF it means "lock till the end of the file".
* Otherwise, it's size of an extent or hole being punched (in bytes).
*/
if (end == OBD_OBJECT_EOF || end < start)
policy.l_extent.end = OBD_OBJECT_EOF;
else
policy.l_extent.end = end | ~PAGE_MASK;
rc = ldlm_cli_enqueue_local(env, ns, res_id, LDLM_EXTENT, &policy,
mode, flags, ldlm_blocking_ast,
ldlm_completion_ast, ldlm_glimpse_ast,
NULL, 0, LVB_T_NONE, NULL, lh);
RETURN(rc == ELDLM_OK ? 0 : -EIO);
}
EXPORT_SYMBOL(tgt_extent_lock);
static int tgt_data_lock(const struct lu_env *env, struct obd_export *exp,
struct ldlm_res_id *res_id, __u64 start, __u64 end,
struct lustre_handle *lh, enum ldlm_mode mode)
{
struct ldlm_namespace *ns = exp->exp_obd->obd_namespace;
__u64 flags = 0;
/* MDT IO for data-on-mdt */
if (exp->exp_connect_data.ocd_connect_flags & OBD_CONNECT_IBITS)
return tgt_mdt_data_lock(ns, res_id, lh, mode, &flags);
return tgt_extent_lock(env, ns, res_id, start, end, lh, mode, &flags);
}
void tgt_data_unlock(struct lustre_handle *lh, enum ldlm_mode mode)
{
LASSERT(lustre_handle_is_used(lh));
ldlm_lock_decref(lh, mode);
}
EXPORT_SYMBOL(tgt_data_unlock);
static int tgt_brw_lock(const struct lu_env *env, struct obd_export *exp,
struct ldlm_res_id *res_id, struct obd_ioobj *obj,
struct niobuf_remote *nb, struct lustre_handle *lh,
enum ldlm_mode mode)
{
int nrbufs = obj->ioo_bufcnt;
int i;
ENTRY;
LASSERT(mode == LCK_PR || mode == LCK_PW);
LASSERT(!lustre_handle_is_used(lh));
if (test_bit(OBDF_RECOVERING, exp->exp_obd->obd_flags))
RETURN(0);
if (nrbufs == 0 || !(nb[0].rnb_flags & OBD_BRW_SRVLOCK))
RETURN(0);
for (i = 1; i < nrbufs; i++)
if (!(nb[i].rnb_flags & OBD_BRW_SRVLOCK))
RETURN(-EFAULT);
return tgt_data_lock(env, exp, res_id, nb[0].rnb_offset,
nb[nrbufs - 1].rnb_offset +
nb[nrbufs - 1].rnb_len - 1, lh, mode);
}
static void tgt_brw_unlock(struct obd_export *exp, struct obd_ioobj *obj,
struct niobuf_remote *niob,
struct lustre_handle *lh, enum ldlm_mode mode)
{
ENTRY;
LASSERT(mode == LCK_PR || mode == LCK_PW);
LASSERT((!test_bit(OBDF_RECOVERING, exp->exp_obd->obd_flags) && obj->ioo_bufcnt &&
niob[0].rnb_flags & OBD_BRW_SRVLOCK) ==
lustre_handle_is_used(lh));
if (lustre_handle_is_used(lh))
tgt_data_unlock(lh, mode);
EXIT;
}
static int tgt_checksum_niobuf(struct lu_target *tgt,
struct niobuf_local *local_nb, int npages,
int opc, enum cksum_types cksum_type,
__u32 *cksum)
{
unsigned char cfs_alg = cksum_obd2cfs(cksum_type);
struct ahash_request *req;
unsigned int bufsize;
int i;
req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
if (IS_ERR(req)) {
CERROR("%s: unable to initialize checksum hash %s\n",
tgt_name(tgt), cfs_crypto_hash_name(cfs_alg));
return PTR_ERR(req);
}
CDEBUG(D_INFO, "Checksum for algo %s\n", cfs_crypto_hash_name(cfs_alg));
for (i = 0; i < npages; i++) {
/* corrupt the data before we compute the checksum, to
* simulate a client->OST data error */
if (i == 0 && opc == OST_WRITE &&
CFS_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
int len = local_nb[i].lnb_len;
struct folio *np = tgt_page_to_corrupt;
if (np) {
char *ptr = kmap_local_page(local_nb[i].lnb_page);
char *ptr2 = kmap_local_folio(np, 0);
memcpy(ptr2 + off, ptr + off, len);
memcpy(ptr2 + off, "bad3", min(4, len));
kunmap_local(ptr2);
kunmap_local(ptr);
/* LU-8376 to preserve original index for
* display in dump_all_bulk_pages() */
np->index = i;
cfs_crypto_hash_update_page(req, fpgptr(np),
off, len);
continue;
} else {
CERROR("%s: can't alloc page for corruption\n",
tgt_name(tgt));
}
}
cfs_crypto_hash_update_page(req, local_nb[i].lnb_page,
local_nb[i].lnb_page_offset & ~PAGE_MASK,
local_nb[i].lnb_len);
/* corrupt the data after we compute the checksum, to
* simulate an OST->client data error */
if (i == 0 && opc == OST_READ &&
CFS_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND)) {
int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
int len = local_nb[i].lnb_len;
struct folio *np = tgt_page_to_corrupt;
if (np) {
char *ptr = kmap_local_page(local_nb[i].lnb_page);
char *ptr2 = kmap_local_folio(np, 0);
memcpy(ptr2 + off, ptr + off, len);
memcpy(ptr2 + off, "bad4", min(4, len));
kunmap_local(ptr2);
kunmap_local(ptr);
/* LU-8376 to preserve original index for
* display in dump_all_bulk_pages() */
np->index = i;
cfs_crypto_hash_update_page(req, fpgptr(np),
off, len);
continue;
} else {
CERROR("%s: can't alloc page for corruption\n",
tgt_name(tgt));
}
}
}
bufsize = sizeof(*cksum);
cfs_crypto_hash_final(req, (unsigned char *)cksum, &bufsize);
return 0;
}
static void dump_all_bulk_pages(struct obdo *oa, int count,
struct niobuf_local *local_nb,
__u32 server_cksum, __u32 client_cksum)
{
char *dbgcksum_file_name;
struct file *filp;
int rc, i;
unsigned int len;
char *buf;
OBD_ALLOC(dbgcksum_file_name, PATH_MAX);
if (!dbgcksum_file_name)
return;
/* will only keep dump of pages on first error for the same range in
* file/fid, not during the resends/retries. */
snprintf(dbgcksum_file_name, PATH_MAX,
"%s-checksum_dump-ost-"DFID":[%llu-%llu]-%x-%x",
(strncmp(libcfs_debug_file_path, "NONE", 4) != 0 ?
libcfs_debug_file_path : LIBCFS_DEBUG_FILE_PATH_DEFAULT),
oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : (__u64)0,
oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
local_nb[0].lnb_file_offset,
local_nb[count-1].lnb_file_offset +
local_nb[count-1].lnb_len - 1, client_cksum, server_cksum);
CWARN("dumping checksum data to %s\n", dbgcksum_file_name);
filp = filp_open(dbgcksum_file_name,
O_CREAT | O_EXCL | O_WRONLY | O_LARGEFILE, 0600);
if (IS_ERR(filp)) {
rc = PTR_ERR(filp);
if (rc == -EEXIST)
CDEBUG(D_INFO, "%s: can't open to dump pages with checksum error: rc = %d\n",
dbgcksum_file_name,
rc);
else
CERROR("%s: can't open to dump pages with checksum error: rc = %d\n",
dbgcksum_file_name, rc);
OBD_FREE(dbgcksum_file_name, PATH_MAX);
return;
}
for (i = 0; i < count; i++) {
void *addr = kmap(local_nb[i].lnb_page);
len = local_nb[i].lnb_len;
buf = addr;
while (len != 0) {
rc = kernel_write(filp, buf, len, &filp->f_pos);
if (rc < 0) {
CERROR("%s: wanted to write %u but got %d error\n",
dbgcksum_file_name, len, rc);
break;
}
len -= rc;
buf += rc;
}
kunmap(kmap_to_page(addr));
}
rc = vfs_fsync_range(filp, 0, LLONG_MAX, 1);
if (rc)
CERROR("%s: sync returns %d\n", dbgcksum_file_name, rc);
filp_close(filp, NULL);
libcfs_debug_dumplog();
OBD_FREE(dbgcksum_file_name, PATH_MAX);
}
static int check_read_checksum(struct niobuf_local *local_nb, int npages,
struct obd_export *exp, struct obdo *oa,
const struct lnet_processid *peer,
__u32 client_cksum, __u32 server_cksum,
enum cksum_types server_cksum_type)
{
char *msg;
enum cksum_types cksum_type;
loff_t start, end;
if (unlikely(npages <= 0))
return 0;
/* unlikely to happen and only if resend does not occur due to cksum
* control failure on Client */
if (unlikely(server_cksum == client_cksum)) {
CDEBUG(D_PAGE, "checksum %x confirmed upon retry\n",
client_cksum);
return 0;
}
if (exp->exp_obd->obd_checksum_dump)
dump_all_bulk_pages(oa, npages, local_nb, server_cksum,
client_cksum);
cksum_type = obd_cksum_type_unpack(oa->o_valid & OBD_MD_FLFLAGS ?
oa->o_flags : 0);
if (cksum_type != server_cksum_type)
msg = "the server may have not used the checksum type specified in the original request - likely a protocol problem";
else
msg = "should have changed on the client or in transit";
start = local_nb[0].lnb_file_offset;
end = local_nb[npages-1].lnb_file_offset +
local_nb[npages-1].lnb_len - 1;
LCONSOLE_ERROR("%s: BAD READ CHECKSUM: %s: from %s inode " DFID " object "DOSTID" extent [%llu-%llu], client returned csum %x (type %x), server csum %x (type %x)\n",
exp->exp_obd->obd_name,
msg, libcfs_nidstr(&peer->nid),
oa->o_valid & OBD_MD_FLFID ? oa->o_parent_seq : 0ULL,
oa->o_valid & OBD_MD_FLFID ? oa->o_parent_oid : 0,
oa->o_valid & OBD_MD_FLFID ? oa->o_parent_ver : 0,
POSTID(&oa->o_oi),
start, end, client_cksum, cksum_type, server_cksum,
server_cksum_type);
return 1;
}
static int tgt_pages2shortio(struct niobuf_local *local, int npages,
unsigned char *buf, int size)
{
int i, off, len, copied = size;
char *ptr;
for (i = 0; i < npages; i++) {
off = local[i].lnb_page_offset & ~PAGE_MASK;
len = local[i].lnb_len;
CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
i, off, len, size);
if (len > size)
return -EINVAL;
ptr = kmap_local_page(local[i].lnb_page);
memcpy(buf, ptr + off, len);
kunmap_local(ptr);
buf += len;
size -= len;
}
return copied - size;
}
static int tgt_checksum_niobuf_t10pi(struct lu_target *tgt,
enum cksum_types cksum_type,
struct niobuf_local *local_nb, int npages,
int opc, obd_dif_csum_fn *fn,
int sector_size, u32 *check_sum,
bool resend)
{
enum cksum_types t10_cksum_type = tgt->lut_dt_conf.ddp_t10_cksum_type;
unsigned char cfs_alg = cksum_obd2cfs(OBD_CKSUM_T10_TOP);
const char *obd_name = tgt->lut_obd->obd_name;
struct ahash_request *req;
unsigned char *buffer;
struct folio *__folio;
__be16 *guard_start;
int guard_number;
int used_number = 0;
__u32 cksum;
unsigned int bufsize = sizeof(cksum);
int rc = 0, rc2;
int used;
int i;
__folio = folio_alloc(GFP_KERNEL, 0);
if (IS_ERR_OR_NULL(__folio))
return -ENOMEM;
req = cfs_crypto_hash_init(cfs_alg, NULL, 0);
if (IS_ERR(req)) {
rc = PTR_ERR(req);
CERROR("%s: unable to initialize checksum hash %s: rc = %d\n",
tgt_name(tgt), cfs_crypto_hash_name(cfs_alg), rc);
goto out;
}
buffer = ll_kmap_local_folio(__folio, 0);
guard_start = (__be16 *)buffer;
guard_number = PAGE_SIZE / sizeof(*guard_start);
if (unlikely(resend))
CDEBUG(D_PAGE | D_HA, "GRD tags per page = %u\n", guard_number);
for (i = 0; i < npages; i++) {
bool use_t10_grd;
int off = local_nb[i].lnb_page_offset & ~PAGE_MASK;
int len = local_nb[i].lnb_len;
int guards_needed = DIV_ROUND_UP(off + len, sector_size) -
(off / sector_size);
if (guards_needed > guard_number - used_number) {
cfs_crypto_hash_update_page(req, fpgptr(__folio), 0,
used_number * sizeof(*guard_start));
used_number = 0;
}
/* corrupt the data before we compute the checksum, to
* simulate a client->OST data error */
if (i == 0 && opc == OST_WRITE &&
CFS_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_RECEIVE)) {
struct folio *np = tgt_page_to_corrupt;
if (np) {
char *ptr = kmap_local_page(local_nb[i].lnb_page);
char *ptr2 = kmap_local_folio(np, 0);
memcpy(ptr2 + off, ptr + off, len);
memcpy(ptr2 + off, "bad3", min(4, len));
kunmap_local(ptr2);
kunmap_local(ptr);
/* LU-8376 to preserve original index for
* display in dump_all_bulk_pages() */
np->index = i;
cfs_crypto_hash_update_page(req, fpgptr(np),
off, len);
continue;
} else {
CERROR("%s: can't alloc page for corruption\n",
tgt_name(tgt));
}
}
/*
* The left guard number should be able to hold checksums of a
* whole page
*/
use_t10_grd = t10_cksum_type && t10_cksum_type == cksum_type &&
opc == OST_READ &&
local_nb[i].lnb_len == PAGE_SIZE &&
local_nb[i].lnb_guard_disk;
if (use_t10_grd) {
used = guards_needed;
if (used > (guard_number - used_number)) {
rc = -E2BIG;
CDEBUG(D_PAGE | D_HA,
"%s: used %u, guard %u/%u, data size %u+%u, sector_size %u: rc = %d\n",
obd_name, used, guard_number,
used_number, local_nb[i].lnb_page_offset,
local_nb[i].lnb_len, sector_size, rc);
break;
}
memcpy(guard_start + used_number,
local_nb[i].lnb_guards,
used * sizeof(*guard_start));
if (unlikely(resend))
CDEBUG(D_PAGE | D_HA,
"lnb[%u]: used %u off %u+%u lnb checksum: %*phN\n",
i, used,
local_nb[i].lnb_page_offset,
local_nb[i].lnb_len,
(int)(used * sizeof(*guard_start)),
guard_start + used_number);
}
if (!use_t10_grd || unlikely(resend)) {
struct folio *folio;
s32 pgno;
__be16 guard_tmp[MAX_GUARD_NUMBER];
__be16 *guards = guard_start + used_number;
int used_tmp = -1, *usedp = &used;
if (unlikely(use_t10_grd)) {
guards = guard_tmp;
usedp = &used_tmp;
}
folio = page_folio(local_nb[i].lnb_page);
pgno = folio_page_idx(folio, local_nb[i].lnb_page);
rc = obd_page_dif_generate_buffer(obd_name,
folio, pgno,
local_nb[i].lnb_page_offset & ~PAGE_MASK,
local_nb[i].lnb_len, guards,
guard_number - used_number, usedp, sector_size,
fn);
if (unlikely(resend)) {
bool bad = use_t10_grd &&
memcmp(guard_tmp,
local_nb[i].lnb_guards,
used_tmp * sizeof(*guard_tmp));
if (bad)
CERROR("lnb[%u]: used %u/%u off %u+%u tmp checksum: %*phN\n",
i, used, used_tmp,
local_nb[i].lnb_page_offset,
local_nb[i].lnb_len,
(int)(used_tmp * sizeof(*guard_start)),
guard_tmp);
CDEBUG_LIMIT(D_PAGE | D_HA | (bad ? D_ERROR : 0),
"lnb[%u]: used %u/%u off %u+%u gen checksum: %*phN\n",
i, used, used_tmp,
local_nb[i].lnb_page_offset,
local_nb[i].lnb_len,
(int)(used * sizeof(*guard_start)),
guard_start + used_number);
}
if (rc)
break;
}
LASSERT(used <= MAX_GUARD_NUMBER);
/*
* If disk support T10PI checksum, copy guards to local_nb.
* If the write is partial page, do not use the guards for bio
* submission since the data might not be full-sector. The bio
* guards will be generated later based on the full sectors. If
* the sector size is 512B rather than 4 KB, or the page size
* is larger than 4KB, this might drop some useful guards for
* partial page write, but it will only add minimal extra time
* of checksum calculation.
*/
if (t10_cksum_type && t10_cksum_type == cksum_type &&
opc == OST_WRITE &&
local_nb[i].lnb_len == PAGE_SIZE) {
local_nb[i].lnb_guard_rpc = 1;
memcpy(local_nb[i].lnb_guards,
guard_start + used_number,
used * sizeof(*local_nb[i].lnb_guards));
}
used_number += used;
/* corrupt the data after we compute the checksum, to
* simulate an OST->client data error */
if (unlikely(i == 0 && opc == OST_READ &&
CFS_FAIL_CHECK(OBD_FAIL_OST_CHECKSUM_SEND))) {
struct folio *np = tgt_page_to_corrupt;
if (np) {
char *ptr = kmap_local_page(local_nb[i].lnb_page);
char *ptr2 = kmap_local_folio(np, 0);
memcpy(ptr2 + off, ptr + off, len);
memcpy(ptr2 + off, "bad4", min(4, len));
kunmap_local(ptr2);
kunmap_local(ptr);
/* LU-8376 to preserve original index for
* display in dump_all_bulk_pages() */
np->index = i;
cfs_crypto_hash_update_page(req, fpgptr(np),
off, len);
continue;
} else {
CERROR("%s: can't alloc page for corruption\n",
tgt_name(tgt));
}
}
}
ll_kunmap_local(buffer);
if (rc)
GOTO(out_hash, rc);
if (used_number != 0)
cfs_crypto_hash_update_page(req, fpgptr(__folio), 0,
used_number * sizeof(*guard_start));
out_hash:
rc2 = cfs_crypto_hash_final(req, (unsigned char *)&cksum, &bufsize);
if (!rc)
rc = rc2;
if (rc == 0)
*check_sum = cksum;
out:
folio_put(__folio);
return rc;
}
static int tgt_checksum_niobuf_rw(struct lu_target *tgt,
enum cksum_types cksum_type,
struct niobuf_local *local_nb,
int npages, int opc, u32 *check_sum,
bool resend)
{
obd_dif_csum_fn *fn = NULL;
int sector_size = 0;
int rc;
ENTRY;
obd_t10_cksum2dif(cksum_type, &fn, §or_size);
if (fn)
rc = tgt_checksum_niobuf_t10pi(tgt, cksum_type,
local_nb, npages,
opc, fn, sector_size,
check_sum, resend);
else
rc = tgt_checksum_niobuf(tgt, local_nb, npages, opc,
cksum_type, check_sum);
RETURN(rc);
}
int tgt_brw_read(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct ptlrpc_bulk_desc *desc = NULL;
struct obd_export *exp = tsi->tsi_exp;
struct niobuf_remote *remote_nb;
struct niobuf_local *local_nb;
struct obd_ioobj *ioo;
struct ost_body *body, *repbody;
struct lustre_handle lockh = { 0 };
int npages, nob = 0, rc, i, no_reply = 0,
npages_read;
struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
const char *obd_name = exp->exp_obd->obd_name;
ktime_t kstart;
ENTRY;
if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
CERROR("%s: deny read request from %s to portal %u\n",
tgt_name(tsi->tsi_tgt),
obd_export_nid2str(req->rq_export),
ptlrpc_req2svc(req)->srv_req_portal);
RETURN(-EPROTO);
}
req->rq_bulk_read = 1;
if (CFS_FAIL_CHECK(OBD_FAIL_OST_BRW_READ_BULK)) {
/* optionally use cfs_fail_val - 1 to select a specific OST on
* this server to fail requests.
*/
char fail_ost_name[MAX_OBD_NAME];
if (cfs_fail_val > 0) {
snprintf(fail_ost_name, MAX_OBD_NAME, "OST%04X",
cfs_fail_val - 1);
if (strstr(obd_name, fail_ost_name))
RETURN(err_serious(-EIO));
} else {
RETURN(err_serious(-EIO));
}
}
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
cfs_fail_val : (obd_timeout + 1) / 4);
/* There must be big cache in current thread to process this request
* if it is NULL then something went wrong and it wasn't allocated,
* report -ENOMEM in that case */
if (tbc == NULL)
RETURN(-ENOMEM);
body = tsi->tsi_ost_body;
LASSERT(body != NULL);
if (body->oa.o_valid & OBD_MD_FLFLAGS &&
body->oa.o_flags & OBD_FL_NORPC)
RETURN(0);
ioo = req_capsule_client_get(tsi->tsi_pill, &RMF_OBD_IOOBJ);
LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
local_nb = tbc->local;
rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
&lockh, LCK_PR);
if (rc != 0)
RETURN(rc);
/*
* If getting the lock took more time than
* client was willing to wait, drop it. b=11330
*/
if (ktime_get_real_seconds() > req->rq_deadline ||
CFS_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
no_reply = 1;
CERROR("Dropping timed-out read from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
libcfs_idstr(&req->rq_peer), POSTID(&ioo->ioo_oid),
ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
req->rq_deadline - req->rq_arrival_time.tv_sec);
GOTO(out_lock, rc = -ETIMEDOUT);
}
/*
* Because we already sync grant info with client when
* reconnect, grant info will be cleared for resent req,
* otherwise, outdated grant count in the rpc would de-sync
* grant counters in case of shrink
*/
if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
body->oa.o_valid &= ~OBD_MD_FLGRANT;
}
repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
repbody->oa = body->oa;
npages = PTLRPC_MAX_BRW_PAGES;
kstart = ktime_get();
rc = obd_preprw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1,
ioo, remote_nb, &npages, local_nb);
if (rc != 0)
GOTO(out_lock, rc);
if (body->oa.o_valid & OBD_MD_FLFLAGS &&
body->oa.o_flags & OBD_FL_SHORT_IO) {
desc = NULL;
} else {
desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
PTLRPC_BULK_PUT_SOURCE,
OST_BULK_PORTAL,
&ptlrpc_bulk_kiov_nopin_ops);
if (desc == NULL)
GOTO(out_commitrw, rc = -ENOMEM);
}
npages_read = npages;
for (i = 0; i < npages; i++) {
int page_rc = local_nb[i].lnb_rc;
if (page_rc < 0) {
rc = page_rc;
npages_read = i;
break;
}
nob += page_rc;
if (page_rc != 0 && desc != NULL) { /* some data! */
LASSERT(local_nb[i].lnb_page != NULL);
CDEBUG(D_INODE,
"lnb %d, at offset %llu, hole %d\n", i,
local_nb[i].lnb_file_offset,
local_nb[i].lnb_hole);
desc->bd_frag_ops->add_kiov_frag
(desc, local_nb[i].lnb_page,
local_nb[i].lnb_page_offset & ~PAGE_MASK,
page_rc);
}
if (page_rc != local_nb[i].lnb_len) { /* short read */
local_nb[i].lnb_len = page_rc;
npages_read = i + (page_rc != 0 ? 1 : 0);
/* All subsequent pages should be 0 */
while (++i < npages)
LASSERT(local_nb[i].lnb_rc == 0);
break;
}
}
if (body->oa.o_valid & OBD_MD_FLCKSUM) {
u32 flag = body->oa.o_valid & OBD_MD_FLFLAGS ?
body->oa.o_flags : 0;
enum cksum_types cksum_type = obd_cksum_type_unpack(flag);
bool resend = (body->oa.o_valid & OBD_MD_FLFLAGS) &&
(body->oa.o_flags & OBD_FL_RECOV_RESEND);
repbody->oa.o_flags = obd_cksum_type_pack(obd_name,
cksum_type);
repbody->oa.o_valid = OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
local_nb, npages_read, OST_READ,
&repbody->oa.o_cksum, resend);
if (rc < 0)
GOTO(out_commitrw, rc);
CDEBUG(D_PAGE | (resend ? D_HA : 0),
"checksum at read origin: %x (%x)\n",
repbody->oa.o_cksum, cksum_type);
/* if a resend it could be for a cksum error, so check Server
* cksum with returned Client cksum (this should even cover
* zero-cksum case) */
if (resend)
check_read_checksum(local_nb, npages_read, exp,
&body->oa, &req->rq_peer,
body->oa.o_cksum,
repbody->oa.o_cksum, cksum_type);
} else {
repbody->oa.o_valid = 0;
}
if (body->oa.o_valid & OBD_MD_FLGRANT)
repbody->oa.o_valid |= OBD_MD_FLGRANT;
/* We're finishing using body->oa as an input variable */
/* Check if client was evicted while we were doing i/o before touching
* network */
if (rc == 0) {
if (body->oa.o_valid & OBD_MD_FLFLAGS &&
body->oa.o_flags & OBD_FL_SHORT_IO) {
unsigned char *short_io_buf;
int short_io_size;
short_io_buf = req_capsule_server_get(&req->rq_pill,
&RMF_SHORT_IO);
short_io_size = req_capsule_get_size(&req->rq_pill,
&RMF_SHORT_IO,
RCL_SERVER);
rc = tgt_pages2shortio(local_nb, npages_read,
short_io_buf, short_io_size);
if (rc >= 0)
req_capsule_shrink(&req->rq_pill,
&RMF_SHORT_IO, rc,
RCL_SERVER);
rc = rc > 0 ? 0 : rc;
} else if (!CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) {
rc = target_bulk_io(exp, desc);
}
no_reply = rc != 0;
} else {
if (body->oa.o_valid & OBD_MD_FLFLAGS &&
body->oa.o_flags & OBD_FL_SHORT_IO)
req_capsule_shrink(&req->rq_pill, &RMF_SHORT_IO, 0,
RCL_SERVER);
}
out_commitrw:
/* Must commit after prep above in all cases */
rc = obd_commitrw(tsi->tsi_env, OBD_BRW_READ, exp, &repbody->oa, 1, ioo,
remote_nb, npages, local_nb, rc, nob, kstart);
out_lock:
tgt_brw_unlock(exp, ioo, remote_nb, &lockh, LCK_PR);
if (desc && !CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2))
ptlrpc_free_bulk(desc);
LASSERT(rc <= 0);
if (rc == 0) {
rc = nob;
ptlrpc_lprocfs_brw(req, nob);
} else if (no_reply) {
req->rq_no_reply = 1;
/* reply out callback would free */
ptlrpc_req_drop_rs(req);
LCONSOLE_WARN("%s: Bulk IO read error with %s (at %s), client will retry: rc %d\n",
obd_name,
obd_uuid2str(&exp->exp_client_uuid),
obd_export_nid2str(exp), rc);
}
/* send a bulk after reply to simulate a network delay or reordering
* by a router - Note that !desc implies short io, so there is no bulk
* to reorder. */
if (unlikely(CFS_FAIL_PRECHECK(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2)) &&
desc) {
/* Calculate checksum before request transfer, original
* it is done by target_bulk_io() */
rc = sptlrpc_svc_wrap_bulk(req, desc);
if (OCD_HAS_FLAG(&exp->exp_connect_data, BULK_MBITS))
req->rq_mbits = lustre_msg_get_mbits(req->rq_reqmsg);
else /* old version, bulk matchbits is rq_xid */
req->rq_mbits = req->rq_xid;
req->rq_status = rc;
target_committed_to_req(req);
target_send_reply(req, 0, 0);
CDEBUG(D_INFO, "reorder BULK\n");
CFS_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_CLIENT_BULK_CB2,
cfs_fail_val ? : 3);
target_bulk_io(exp, desc);
ptlrpc_free_bulk(desc);
}
RETURN(rc);
}
EXPORT_SYMBOL(tgt_brw_read);
static int tgt_shortio2pages(struct niobuf_local *local, int npages,
unsigned char *buf, unsigned int size)
{
int i, off, len;
char *ptr;
for (i = 0; i < npages; i++) {
off = local[i].lnb_page_offset & ~PAGE_MASK;
len = local[i].lnb_len;
if (len == 0)
continue;
CDEBUG(D_PAGE, "index %d offset = %d len = %d left = %d\n",
i, off, len, size);
ptr = kmap_local_page(local[i].lnb_page);
memcpy(ptr + off, buf, len < size ? len : size);
kunmap_local(ptr);
buf += len;
size -= len;
}
return 0;
}
static void tgt_warn_on_cksum(struct ptlrpc_request *req,
struct ptlrpc_bulk_desc *desc,
struct niobuf_local *local_nb, int npages,
u32 client_cksum, u32 server_cksum,
bool mmap)
{
struct obd_export *exp = req->rq_export;
struct ost_body *body;
char *router = "";
char *via = "";
body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
LASSERT(body != NULL);
if (desc && !nid_same(&req->rq_peer.nid, &desc->bd_sender)) {
via = " via ";
router = libcfs_nidstr(&desc->bd_sender);
}
if (exp->exp_obd->obd_checksum_dump)
dump_all_bulk_pages(&body->oa, npages, local_nb, server_cksum,
client_cksum);
if (mmap) {
CDEBUG_LIMIT(D_INFO, "client csum %x, server csum %x\n",
client_cksum, server_cksum);
return;
}
LCONSOLE_ERROR("%s: BAD WRITE CHECKSUM: from %s%s%s inode " DFID " object " DOSTID " extent [%llu-%llu]: client csum %x, server csum %x\n",
exp->exp_obd->obd_name, libcfs_idstr(&req->rq_peer),
via, router,
body->oa.o_valid & OBD_MD_FLFID ?
body->oa.o_parent_seq : (__u64)0,
body->oa.o_valid & OBD_MD_FLFID ?
body->oa.o_parent_oid : 0,
body->oa.o_valid & OBD_MD_FLFID ?
body->oa.o_parent_ver : 0,
POSTID(&body->oa.o_oi),
local_nb[0].lnb_file_offset,
local_nb[npages-1].lnb_file_offset +
local_nb[npages - 1].lnb_len - 1,
client_cksum, server_cksum);
}
int tgt_brw_write(struct tgt_session_info *tsi)
{
struct ptlrpc_request *req = tgt_ses_req(tsi);
struct ptlrpc_bulk_desc *desc = NULL;
struct obd_export *exp = req->rq_export;
struct niobuf_remote *remote_nb;
struct niobuf_local *local_nb;
struct obd_ioobj *ioo;
struct ost_body *body, *repbody;
struct lustre_handle lockh = {0};
__u32 *rcs;
int objcount, niocount, npages;
int rc = 0;
int i, j;
enum cksum_types cksum_type = OBD_CKSUM_CRC32;
bool no_reply = false, mmap;
struct tgt_thread_big_cache *tbc = req->rq_svc_thread->t_data;
bool wait_sync = false;
const char *obd_name = exp->exp_obd->obd_name;
/* '1' for consistency with code that checks !mpflag to restore */
unsigned int mpflags = 1;
ktime_t kstart;
int nob = 0;
ENTRY;
if (ptlrpc_req2svc(req)->srv_req_portal != OST_IO_PORTAL &&
ptlrpc_req2svc(req)->srv_req_portal != MDS_IO_PORTAL) {
CERROR("%s: deny write request from %s to portal %u\n",
tgt_name(tsi->tsi_tgt),
obd_export_nid2str(req->rq_export),
ptlrpc_req2svc(req)->srv_req_portal);
RETURN(err_serious(-EPROTO));
}
if (CFS_FAIL_CHECK(OBD_FAIL_OST_ENOSPC))
RETURN(err_serious(-ENOSPC));
if (CFS_FAIL_TIMEOUT(OBD_FAIL_OST_EROFS, 1))
RETURN(err_serious(cfs_fail_val ? -cfs_fail_val : -EROFS));
req->rq_bulk_write = 1;
if (CFS_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK))
rc = -EIO;
if (CFS_FAIL_CHECK(OBD_FAIL_OST_BRW_WRITE_BULK2))
rc = -EFAULT;
if (rc < 0) {
/* optionally use cfs_fail_val - 1 to select a specific OST on
* this server to fail requests.
*/
char fail_ost_name[MAX_OBD_NAME];
if (cfs_fail_val > 0) {
snprintf(fail_ost_name, MAX_OBD_NAME, "OST%04X",
cfs_fail_val - 1);
if (strstr(obd_name, fail_ost_name))
RETURN(err_serious(rc));
} else {
RETURN(err_serious(rc));
}
}
/* pause before transaction has been started */
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK, cfs_fail_val > 0 ?
cfs_fail_val : (obd_timeout + 1) / 4);
/* Delay write commit to show stale size information */
CFS_FAIL_TIMEOUT(OBD_FAIL_OSC_NO_SIZE_DATA, cfs_fail_val);
/* There must be big cache in current thread to process this request
* if it is NULL then something went wrong and it wasn't allocated,
* report -ENOMEM in that case */
if (tbc == NULL)
RETURN(-ENOMEM);
body = tsi->tsi_ost_body;
LASSERT(body != NULL);
if (body->oa.o_valid & OBD_MD_FLFLAGS &&
body->oa.o_flags & OBD_FL_NORPC)
RETURN(0);
ioo = req_capsule_client_get(&req->rq_pill, &RMF_OBD_IOOBJ);
LASSERT(ioo != NULL); /* must exists after tgt_ost_body_unpack */
objcount = req_capsule_get_size(&req->rq_pill, &RMF_OBD_IOOBJ,
RCL_CLIENT) / sizeof(*ioo);
for (niocount = i = 0; i < objcount; i++)
niocount += ioo[i].ioo_bufcnt;
remote_nb = req_capsule_client_get(&req->rq_pill, &RMF_NIOBUF_REMOTE);
LASSERT(remote_nb != NULL); /* must exists after tgt_ost_body_unpack */
if (niocount != req_capsule_get_size(&req->rq_pill,
&RMF_NIOBUF_REMOTE, RCL_CLIENT) /
sizeof(*remote_nb))
RETURN(err_serious(-EPROTO));
if ((remote_nb[0].rnb_flags & OBD_BRW_MEMALLOC) &&
exp->exp_connection &&
LNetIsPeerLocal(&exp->exp_connection->c_peer.nid))
mpflags = memalloc_noreclaim_save();
/* it is incorrect to return ENOSPC when granted space has been used */
if (unlikely(!(remote_nb[0].rnb_flags & OBD_BRW_FROM_GRANT))) {
if (CFS_FAIL_CHECK(OBD_FAIL_OST_ENOSPC_VALID))
RETURN(err_serious(-ENOSPC));
}
req_capsule_set_size(&req->rq_pill, &RMF_RCS, RCL_SERVER,
niocount * sizeof(*rcs));
rc = req_capsule_server_pack(&req->rq_pill);
if (rc != 0)
GOTO(out, rc = err_serious(rc));
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_PACK, cfs_fail_val);
rcs = req_capsule_server_get(&req->rq_pill, &RMF_RCS);
local_nb = tbc->local;
rc = tgt_brw_lock(tsi->tsi_env, exp, &tsi->tsi_resid, ioo, remote_nb,
&lockh, LCK_PW);
if (rc != 0)
GOTO(out, rc);
/*
* If getting the lock took more time than
* client was willing to wait, drop it. b=11330
*/
if (ktime_get_real_seconds() > req->rq_deadline ||
CFS_FAIL_CHECK(OBD_FAIL_OST_DROP_REQ)) {
no_reply = true;
CERROR("%s: Dropping timed-out write from %s because locking object " DOSTID " took %lld seconds (limit was %lld).\n",
tgt_name(tsi->tsi_tgt), libcfs_idstr(&req->rq_peer),
POSTID(&ioo->ioo_oid),
ktime_get_real_seconds() - req->rq_arrival_time.tv_sec,
req->rq_deadline - req->rq_arrival_time.tv_sec);
GOTO(out_lock, rc = -ETIMEDOUT);
}
/* Because we already sync grant info with client when reconnect,
* grant info will be cleared for resent req, then fed_grant and
* total_grant will not be modified in following preprw_write */
if (lustre_msg_get_flags(req->rq_reqmsg) & (MSG_RESENT | MSG_REPLAY)) {
DEBUG_REQ(D_CACHE, req, "clear resent/replay req grant info");
body->oa.o_valid &= ~OBD_MD_FLGRANT;
}
repbody = req_capsule_server_get(&req->rq_pill, &RMF_OST_BODY);
if (repbody == NULL)
GOTO(out_lock, rc = -ENOMEM);
repbody->oa = body->oa;
npages = PTLRPC_MAX_BRW_PAGES;
kstart = ktime_get();
rc = obd_preprw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
objcount, ioo, remote_nb, &npages, local_nb);
if (rc < 0)
GOTO(out_lock, rc);
if (body->oa.o_valid & OBD_MD_FLFLAGS &&
body->oa.o_flags & OBD_FL_SHORT_IO) {
unsigned int short_io_size;
unsigned char *short_io_buf;
short_io_size = req_capsule_get_size(&req->rq_pill,
&RMF_SHORT_IO,
RCL_CLIENT);
short_io_buf = req_capsule_client_get(&req->rq_pill,
&RMF_SHORT_IO);
CDEBUG(D_INFO, "Client use short io for data transfer, size = %d\n",
short_io_size);
/* Copy short io buf to pages */
rc = tgt_shortio2pages(local_nb, npages, short_io_buf,
short_io_size);
desc = NULL;
} else {
desc = ptlrpc_prep_bulk_exp(req, npages, ioobj_max_brw_get(ioo),
PTLRPC_BULK_GET_SINK,
OST_BULK_PORTAL,
&ptlrpc_bulk_kiov_nopin_ops);
if (desc == NULL)
GOTO(skip_transfer, rc = -ENOMEM);
/* NB Having prepped, we must commit... */
for (i = 0; i < npages; i++)
desc->bd_frag_ops->add_kiov_frag(desc,
local_nb[i].lnb_page,
local_nb[i].lnb_page_offset & ~PAGE_MASK,
local_nb[i].lnb_len);
rc = sptlrpc_svc_prep_bulk(req, desc);
if (rc != 0)
GOTO(skip_transfer, rc);
rc = target_bulk_io(exp, desc);
}
no_reply = rc != 0;
skip_transfer:
if (body->oa.o_valid & OBD_MD_FLCKSUM && rc == 0) {
static int cksum_counter;
if (body->oa.o_valid & OBD_MD_FLFLAGS)
cksum_type = obd_cksum_type_unpack(body->oa.o_flags);
repbody->oa.o_valid |= OBD_MD_FLCKSUM | OBD_MD_FLFLAGS;
repbody->oa.o_flags &= ~OBD_FL_CKSUM_ALL;
repbody->oa.o_flags |= obd_cksum_type_pack(obd_name,
cksum_type);
rc = tgt_checksum_niobuf_rw(tsi->tsi_tgt, cksum_type,
local_nb, npages, OST_WRITE,
&repbody->oa.o_cksum, false);
if (rc < 0)
GOTO(out_commitrw, rc);
cksum_counter++;
if (unlikely(body->oa.o_cksum != repbody->oa.o_cksum)) {
mmap = (body->oa.o_valid & OBD_MD_FLFLAGS &&
body->oa.o_flags & OBD_FL_MMAP);
tgt_warn_on_cksum(req, desc, local_nb, npages,
body->oa.o_cksum,
repbody->oa.o_cksum, mmap);
cksum_counter = 0;
} else if ((cksum_counter & (-cksum_counter)) ==
cksum_counter) {
CDEBUG(D_INFO, "Checksum %u from %s OK: %x\n",
cksum_counter, libcfs_idstr(&req->rq_peer),
repbody->oa.o_cksum);
}
}
CFS_FAIL_TIMEOUT(OBD_FAIL_OST_BRW_PAUSE_BULK2, cfs_fail_val);
out_commitrw:
/* calculate the expected actual write bytes (nob) for OFD stats.
* Technically, if commit fails this would be wrong, but that should be
* very rare
*/
for (i = 0; i < niocount; i++) {
int len = remote_nb[i].rnb_len;
nob += len;
}
/* multiple transactions can be assigned during write commit */
tsi->tsi_mult_trans = 1;
/* Must commit after prep above in all cases */
rc = obd_commitrw(tsi->tsi_env, OBD_BRW_WRITE, exp, &repbody->oa,
objcount, ioo, remote_nb, npages, local_nb, rc, nob,
kstart);
if (rc == -ENOTCONN)
/* quota acquire process has been given up because
* either the client has been evicted or the client
* has timed out the request already
*/
no_reply = true;
for (i = 0; i < niocount; i++) {
if (!(local_nb[i].lnb_flags & OBD_BRW_ASYNC)) {
wait_sync = true;
break;
}
}
/*
* Disable sending mtime back to the client. If the client locked the
* whole object, then it has already updated the mtime on its side,
* otherwise it will have to glimpse anyway (see bug 21489, comment 32)
*/
repbody->oa.o_valid &= ~(OBD_MD_FLMTIME | OBD_MD_FLATIME);
if (rc == 0) {
/* set per-requested niobuf return codes */
for (i = j = 0; i < niocount; i++) {
int len = remote_nb[i].rnb_len;
rcs[i] = 0;
do {
LASSERT(j < npages);
if (local_nb[j].lnb_rc < 0)
rcs[i] = local_nb[j].lnb_rc;
len -= local_nb[j].lnb_len;
j++;
} while (len > 0);
LASSERT(len == 0);
}
LASSERT(j == npages);
ptlrpc_lprocfs_brw(req, nob);
}
out_lock:
tgt_brw_unlock(exp, ioo, remote_nb, &lockh, LCK_PW);
if (desc)
ptlrpc_free_bulk(desc);
out:
if (unlikely(no_reply || (exp->exp_obd->obd_no_transno && wait_sync))) {
req->rq_no_reply = 1;
/* reply out callback would free */
ptlrpc_req_drop_rs(req);
if (!exp->exp_obd->obd_no_transno)
LCONSOLE_WARN("%s: Bulk IO write error with %s (at %s), client will retry: rc = %d\n",
obd_name,
obd_uuid2str(&exp->exp_client_uuid),
obd_export_nid2str(exp), rc);
}
if (mpflags)
memalloc_noreclaim_restore(mpflags);
RETURN(rc);
}
EXPORT_SYMBOL(tgt_brw_write);
/**
* tgt_lseek() - Common request handler for OST_SEEK RPC.
* @tsi: target session environment for this request
*
* Unified request handling for OST_SEEK RPC.
* It takes object by its FID, does needed lseek and packs result
* into reply. Only SEEK_HOLE and SEEK_DATA are supported.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
int tgt_lseek(struct tgt_session_info *tsi)
{
struct lustre_handle lh = { 0 };
struct dt_object *dob;
struct ost_body *repbody;
loff_t offset = tsi->tsi_ost_body->oa.o_size;
int whence = tsi->tsi_ost_body->oa.o_mode;
bool srvlock;
int rc = 0;
ENTRY;
if (whence != SEEK_HOLE && whence != SEEK_DATA)
RETURN(-EPROTO);
/* Negative offset is prohibited on wire and must be handled on client
* prior sending RPC.
*/
if (offset < 0)
RETURN(-EPROTO);
repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
if (repbody == NULL)
RETURN(-ENOMEM);
repbody->oa = tsi->tsi_ost_body->oa;
srvlock = tsi->tsi_ost_body->oa.o_valid & OBD_MD_FLFLAGS &&
tsi->tsi_ost_body->oa.o_flags & OBD_FL_SRVLOCK;
if (srvlock) {
rc = tgt_data_lock(tsi->tsi_env, tsi->tsi_exp, &tsi->tsi_resid,
offset, OBD_OBJECT_EOF, &lh, LCK_PR);
if (rc)
RETURN(rc);
}
dob = dt_locate(tsi->tsi_env, tsi->tsi_tgt->lut_bottom, &tsi->tsi_fid);
if (IS_ERR(dob))
GOTO(out, rc = PTR_ERR(dob));
if (!dt_object_exists(dob))
GOTO(obj_put, rc = -ENOENT);
repbody->oa.o_size = dt_lseek(tsi->tsi_env, dob, offset, whence);
rc = 0;
obj_put:
dt_object_put(tsi->tsi_env, dob);
out:
if (srvlock)
tgt_data_unlock(&lh, LCK_PR);
RETURN(rc);
}
EXPORT_SYMBOL(tgt_lseek);
/* Check if request can be reconstructed from saved reply data
* A copy of the reply data is returned in @trd if the pointer is not NULL
*/
int req_can_reconstruct(struct ptlrpc_request *req,
struct tg_reply_data *trd)
{
struct tg_export_data *ted = &req->rq_export->exp_target_data;
struct lsd_client_data *lcd = ted->ted_lcd;
int found;
if (tgt_is_multimodrpcs_client(req->rq_export))
return tgt_lookup_reply(req, trd);
mutex_lock(&ted->ted_lcd_lock);
found = req->rq_xid == lcd->lcd_last_xid ||
req->rq_xid == lcd->lcd_last_close_xid;
if (found && trd != NULL) {
if (lustre_msg_get_opc(req->rq_reqmsg) == MDS_CLOSE) {
trd->trd_reply.lrd_xid = lcd->lcd_last_close_xid;
trd->trd_reply.lrd_transno =
lcd->lcd_last_close_transno;
trd->trd_reply.lrd_result = lcd->lcd_last_close_result;
} else {
trd->trd_reply.lrd_xid = lcd->lcd_last_xid;
trd->trd_reply.lrd_transno = lcd->lcd_last_transno;
trd->trd_reply.lrd_result = lcd->lcd_last_result;
trd->trd_reply.lrd_data = lcd->lcd_last_data;
trd->trd_pre_versions[0] = lcd->lcd_pre_versions[0];
trd->trd_pre_versions[1] = lcd->lcd_pre_versions[1];
trd->trd_pre_versions[2] = lcd->lcd_pre_versions[2];
trd->trd_pre_versions[3] = lcd->lcd_pre_versions[3];
}
}
mutex_unlock(&ted->ted_lcd_lock);
return found;
}
EXPORT_SYMBOL(req_can_reconstruct);
bool tgt_check_resent(struct ptlrpc_request *req, struct tg_reply_data *trd)
{
struct lsd_reply_data *lrd;
bool need_reconstruct = false;
ENTRY;
if (likely(!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_RESENT)))
return false;
if (req_can_reconstruct(req, trd) == 1) {
lrd = &trd->trd_reply;
req->rq_transno = lrd->lrd_transno;
req->rq_status = lrd->lrd_result;
if (req->rq_status != 0)
req->rq_transno = 0;
lustre_msg_set_transno(req->rq_repmsg, req->rq_transno);
lustre_msg_set_status(req->rq_repmsg, req->rq_status);
DEBUG_REQ(D_HA, req, "reconstruct resent RPC");
need_reconstruct = true;
} else {
DEBUG_REQ(D_HA, req, "no reply for RESENT req");
}
return need_reconstruct;
}
EXPORT_SYMBOL(tgt_check_resent);
