*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, Intel Corporation.
+ * Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
- * lustre/osp/osp_sync.c
+ * lustre/osp/osp_precreate.c
*
* Lustre OST Proxy Device
*
* Author: Di Wang <di.wang@intel.com>
*/
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#define DEBUG_SUBSYSTEM S_MDS
+#include <linux/kthread.h>
+
+#include <lustre_obdo.h>
+
#include "osp_internal.h"
/*
* = import is disconnected =
*
* = import is inactive =
- * in this case osp_declare_object_create() returns an error
+ * in this case osp_declare_create() returns an error
*
*/
/*
- * statfs
+ **
+ * Check whether statfs data is expired
+ *
+ * OSP device caches statfs data for the target, the function checks
+ * whether the data is expired or not.
+ *
+ * \param[in] d OSP device
+ *
+ * \retval 0 - not expired, 1 - expired
*/
static inline int osp_statfs_need_update(struct osp_device *d)
{
- return !cfs_time_before(cfs_time_current(),
- d->opd_statfs_fresh_till);
+ return !ktime_before(ktime_get(), d->opd_statfs_fresh_till);
+}
+
+/*
+ * OSP tries to maintain pool of available objects so that calls to create
+ * objects don't block most of time
+ *
+ * each time OSP gets connected to OST, we should start from precreation cleanup
+ */
+static inline bool osp_precreate_running(struct osp_device *d)
+{
+ return !!(d->opd_pre_thread.t_flags & SVC_RUNNING);
+}
+
+static inline bool osp_precreate_stopped(struct osp_device *d)
+{
+ return !!(d->opd_pre_thread.t_flags & SVC_STOPPED);
}
-static void osp_statfs_timer_cb(unsigned long _d)
+static void osp_statfs_timer_cb(cfs_timer_cb_arg_t data)
{
- struct osp_device *d = (struct osp_device *) _d;
+ struct osp_device *d = cfs_from_timer(d, data, opd_statfs_timer);
LASSERT(d);
- cfs_waitq_signal(&d->opd_pre_waitq);
+ if (osp_precreate_running(d))
+ wake_up(&d->opd_pre_waitq);
}
+/**
+ * RPC interpret callback for OST_STATFS RPC
+ *
+ * An interpretation callback called by ptlrpc for OST_STATFS RPC when it is
+ * replied by the target. It's used to maintain statfs cache for the target.
+ * The function fills data from the reply if successful and schedules another
+ * update.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] req RPC replied
+ * \param[in] aa callback data
+ * \param[in] rc RPC result
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
+ */
static int osp_statfs_interpret(const struct lu_env *env,
- struct ptlrpc_request *req,
- union ptlrpc_async_args *aa, int rc)
+ struct ptlrpc_request *req, void *args, int rc)
{
- struct obd_import *imp = req->rq_import;
- struct obd_statfs *msfs;
- struct osp_device *d;
+ union ptlrpc_async_args *aa = args;
+ struct obd_import *imp = req->rq_import;
+ struct obd_statfs *msfs;
+ struct osp_device *d;
+ u64 maxage_ns;
ENTRY;
d->opd_statfs = *msfs;
- osp_pre_update_status(d, rc);
+ if (d->opd_pre)
+ osp_pre_update_status(d, rc);
/* schedule next update */
- d->opd_statfs_fresh_till = cfs_time_shift(d->opd_statfs_maxage);
- cfs_timer_arm(&d->opd_statfs_timer, d->opd_statfs_fresh_till);
+ maxage_ns = d->opd_statfs_maxage * NSEC_PER_SEC;
+ d->opd_statfs_fresh_till = ktime_add_ns(ktime_get(), maxage_ns);
+ mod_timer(&d->opd_statfs_timer,
+ jiffies + cfs_time_seconds(d->opd_statfs_maxage));
d->opd_statfs_update_in_progress = 0;
CDEBUG(D_CACHE, "updated statfs %p\n", d);
RETURN(0);
out:
- /* couldn't update statfs, try again as soon as possible */
- cfs_waitq_signal(&d->opd_pre_waitq);
+ /* couldn't update statfs, try again with a small delay */
+ d->opd_statfs_fresh_till = ktime_add_ns(ktime_get(), 10 * NSEC_PER_SEC);
+ d->opd_statfs_update_in_progress = 0;
+ if (d->opd_pre != NULL && osp_precreate_running(d))
+ wake_up(&d->opd_pre_waitq);
+
if (req->rq_import_generation == imp->imp_generation)
CDEBUG(D_CACHE, "%s: couldn't update statfs: rc = %d\n",
d->opd_obd->obd_name, rc);
RETURN(rc);
}
-static int osp_statfs_update(struct osp_device *d)
+/**
+ * Send OST_STATFS RPC
+ *
+ * Sends OST_STATFS RPC to refresh cached statfs data for the target.
+ * Also disables scheduled updates as times OSP may need to refresh
+ * statfs data before expiration. The function doesn't block, instead
+ * an interpretation callback osp_statfs_interpret() is used.
+ *
+ * \param[in] d OSP device
+ */
+static int osp_statfs_update(const struct lu_env *env, struct osp_device *d)
{
+ u64 expire = obd_timeout * 1000 * NSEC_PER_SEC;
struct ptlrpc_request *req;
struct obd_import *imp;
union ptlrpc_async_args *aa;
- int rc;
+ int rc;
ENTRY;
imp = d->opd_obd->u.cli.cl_import;
LASSERT(imp);
- req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
+ req = ptlrpc_request_alloc(imp,
+ d->opd_pre ? &RQF_OST_STATFS : &RQF_MDS_STATFS);
if (req == NULL)
RETURN(-ENOMEM);
- rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
+ rc = ptlrpc_request_pack(req,
+ d->opd_pre ? LUSTRE_OST_VERSION : LUSTRE_MDS_VERSION,
+ d->opd_pre ? OST_STATFS : MDS_STATFS);
if (rc) {
ptlrpc_request_free(req);
RETURN(rc);
}
ptlrpc_request_set_replen(req);
- req->rq_request_portal = OST_CREATE_PORTAL;
+ if (d->opd_pre)
+ req->rq_request_portal = OST_CREATE_PORTAL;
ptlrpc_at_set_req_timeout(req);
- req->rq_interpret_reply = (ptlrpc_interpterer_t)osp_statfs_interpret;
+ req->rq_interpret_reply = osp_statfs_interpret;
aa = ptlrpc_req_async_args(req);
aa->pointer_arg[0] = d;
/*
* no updates till reply
*/
- cfs_timer_disarm(&d->opd_statfs_timer);
- d->opd_statfs_fresh_till = cfs_time_shift(obd_timeout * 1000);
+ del_timer(&d->opd_statfs_timer);
+ d->opd_statfs_fresh_till = ktime_add_ns(ktime_get(), expire);
d->opd_statfs_update_in_progress = 1;
- ptlrpcd_add_req(req, PDL_POLICY_ROUND, -1);
+ ptlrpcd_add_req(req);
+
+ /* we still want to sync changes if no new changes are coming */
+ if (ktime_before(ktime_get(), d->opd_sync_next_commit_cb))
+ GOTO(out, rc);
+
+ if (atomic_read(&d->opd_sync_changes)) {
+ struct thandle *th;
+ th = dt_trans_create(env, d->opd_storage);
+ if (IS_ERR(th)) {
+ CERROR("%s: can't sync\n", d->opd_obd->obd_name);
+ GOTO(out, rc);
+ }
+ rc = dt_trans_start_local(env, d->opd_storage, th);
+ if (rc == 0) {
+ CDEBUG(D_OTHER, "%s: sync forced, %d changes\n",
+ d->opd_obd->obd_name,
+ atomic_read(&d->opd_sync_changes));
+ osp_sync_add_commit_cb_1s(env, d, th);
+ dt_trans_stop(env, d->opd_storage, th);
+ }
+ }
+
+out:
RETURN(0);
}
-/*
- * XXX: there might be a case where removed object(s) do not add free
- * space (empty object). if the number of such deletions is high, then
- * we can start to update statfs too often - a rpc storm
- * TODO: some throttling is needed
+/**
+ * Schedule an immediate update for statfs data
+ *
+ * If cached statfs data claim no free space, but OSP has got a request to
+ * destroy an object (so release some space probably), then we may need to
+ * refresh cached statfs data sooner than planned. The function checks there
+ * is no statfs update going and schedules immediate update if so.
+ * XXX: there might be a case where removed object(s) do not add free space (empty
+ * object). If the number of such deletions is high, then we can start to update
+ * statfs too often causing a RPC storm. some throttling is needed...
+ *
+ * \param[in] d OSP device where statfs data needs to be refreshed
*/
void osp_statfs_need_now(struct osp_device *d)
{
* then we should poll OST immediately once object destroy
* is replied
*/
- d->opd_statfs_fresh_till = cfs_time_shift(-1);
- cfs_timer_disarm(&d->opd_statfs_timer);
- cfs_waitq_signal(&d->opd_pre_waitq);
+ d->opd_statfs_fresh_till = ktime_sub_ns(ktime_get(), NSEC_PER_SEC);
+ del_timer(&d->opd_statfs_timer);
+ wake_up(&d->opd_pre_waitq);
}
}
-
-/*
- * OSP tries to maintain pool of available objects so that calls to create
- * objects don't block most of time
+/**
+ * Return number of precreated objects
*
- * each time OSP gets connected to OST, we should start from precreation cleanup
+ * A simple helper to calculate the number of precreated objects on the device.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] osp OSP device
+ *
+ * \retval the number of the precreated objects
*/
-static inline int osp_precreate_running(struct osp_device *d)
-{
- return !!(d->opd_pre_thread.t_flags & SVC_RUNNING);
-}
-
-static inline int osp_precreate_stopped(struct osp_device *d)
-{
- return !!(d->opd_pre_thread.t_flags & SVC_STOPPED);
-}
-
static inline int osp_objs_precreated(const struct lu_env *env,
struct osp_device *osp)
{
- struct lu_fid *fid1 = &osp->opd_pre_last_created_fid;
- struct lu_fid *fid2 = &osp->opd_pre_used_fid;
-
- LASSERTF(fid_seq(fid1) == fid_seq(fid2),
- "Created fid"DFID" Next fid "DFID"\n", PFID(fid1), PFID(fid2));
-
- if (fid_is_idif(fid1)) {
- struct ost_id *oi1 = &osp_env_info(env)->osi_oi;
- struct ost_id *oi2 = &osp_env_info(env)->osi_oi2;
-
- LASSERT(fid_is_idif(fid1) && fid_is_idif(fid2));
- ostid_idif_pack(fid1, oi1);
- ostid_idif_pack(fid2, oi2);
- LASSERT(oi1->oi_id >= oi2->oi_id);
-
- return oi1->oi_id - oi2->oi_id;
- }
-
- return fid_oid(fid1) - fid_oid(fid2);
+ return osp_fid_diff(&osp->opd_pre_last_created_fid,
+ &osp->opd_pre_used_fid);
}
+/**
+ * Check pool of precreated objects is nearly empty
+ *
+ * We should not wait till the pool of the precreated objects is exhausted,
+ * because then there will be a long period of OSP being unavailable for the
+ * new creations due to lenghty precreate RPC. Instead we ask for another
+ * precreation ahead and hopefully have it ready before the current pool is
+ * empty. Notice this function relies on an external locking.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] d OSP device
+ *
+ * \retval 0 - current pool is good enough, 1 - time to precreate
+ */
static inline int osp_precreate_near_empty_nolock(const struct lu_env *env,
struct osp_device *d)
{
/* don't consider new precreation till OST is healty and
* has free space */
- return ((window - d->opd_pre_reserved < d->opd_pre_grow_count / 2) &&
+ return ((window - d->opd_pre_reserved < d->opd_pre_create_count / 2) &&
(d->opd_pre_status == 0));
}
+/**
+ * Check pool of precreated objects
+ *
+ * This is protected version of osp_precreate_near_empty_nolock(), check that
+ * for the details.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] d OSP device
+ *
+ * \retval 0 - current pool is good enough, 1 - time to precreate
+ */
static inline int osp_precreate_near_empty(const struct lu_env *env,
struct osp_device *d)
{
int rc;
+ if (d->opd_pre == NULL)
+ return 0;
+
/* XXX: do we really need locking here? */
spin_lock(&d->opd_pre_lock);
rc = osp_precreate_near_empty_nolock(env, d);
}
/**
- * Write fid into last_oid/last_seq file.
+ * Check given sequence is empty
+ *
+ * Returns a binary result whether the given sequence has some IDs left
+ * or not. Find the details in osp_fid_end_seq(). This is a lock protected
+ * version of that function.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] osp OSP device
+ *
+ * \retval 0 - current sequence has no IDs, 1 - otherwise
+ */
+static inline int osp_create_end_seq(const struct lu_env *env,
+ struct osp_device *osp)
+{
+ struct lu_fid *fid = &osp->opd_pre_used_fid;
+ int rc;
+
+ spin_lock(&osp->opd_pre_lock);
+ rc = osp_fid_end_seq(env, fid);
+ spin_unlock(&osp->opd_pre_lock);
+ return rc;
+}
+
+/**
+ * Write FID into into last_oid/last_seq file
+ *
+ * The function stores the sequence and the in-sequence id into two dedicated
+ * files. The sync argument can be used to request synchronous commit, so the
+ * function won't return until the updates are committed.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] osp OSP device
+ * \param[in] fid fid where sequence/id is taken
+ * \param[in] sync update mode: 0 - asynchronously, 1 - synchronously
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
**/
int osp_write_last_oid_seq_files(struct lu_env *env, struct osp_device *osp,
struct lu_fid *fid, int sync)
struct lu_buf *lb_oid = &oti->osi_lb;
struct lu_buf *lb_oseq = &oti->osi_lb2;
loff_t oid_off;
+ u64 oid;
loff_t oseq_off;
struct thandle *th;
int rc;
ENTRY;
- /* Note: through f_oid is only 32bits, it will also write
- * 64 bits for oid to keep compatiblity with the previous
- * version. */
- lb_oid->lb_buf = &fid->f_oid;
- lb_oid->lb_len = sizeof(obd_id);
- oid_off = sizeof(obd_id) * osp->opd_index;
+ if (osp->opd_storage->dd_rdonly)
+ RETURN(0);
- lb_oseq->lb_buf = &fid->f_seq;
- lb_oseq->lb_len = sizeof(obd_id);
- oseq_off = sizeof(obd_id) * osp->opd_index;
+ /* Note: through f_oid is only 32 bits, it will also write 64 bits
+ * for oid to keep compatibility with the previous version. */
+ oid = fid->f_oid;
+ osp_objid_buf_prep(lb_oid, &oid_off,
+ &oid, osp->opd_index);
+
+ osp_objseq_buf_prep(lb_oseq, &oseq_off,
+ &fid->f_seq, osp->opd_index);
th = dt_trans_create(env, osp->opd_storage);
if (IS_ERR(th))
th->th_sync |= sync;
rc = dt_declare_record_write(env, osp->opd_last_used_oid_file,
- lb_oid->lb_len, oid_off, th);
+ lb_oid, oid_off, th);
if (rc != 0)
GOTO(out, rc);
rc = dt_declare_record_write(env, osp->opd_last_used_seq_file,
- lb_oseq->lb_len, oseq_off, th);
+ lb_oseq, oseq_off, th);
if (rc != 0)
GOTO(out, rc);
}
/**
- * alloc fids for precreation.
- * rc = 0 Success, @grow is the count of real allocation.
- * rc = 1 Current seq is used up.
- * rc < 0 Other error.
- **/
+ * Switch to another sequence
+ *
+ * When a current sequence has no available IDs left, OSP has to switch to
+ * another new sequence. OSP requests it using the regular FLDB protocol
+ * and stores synchronously before that is used in precreated. This is needed
+ * to basically have the sequences referenced (not orphaned), otherwise it's
+ * possible that OST has some objects precreated and the clients have data
+ * written to it, but after MDT failover nobody refers those objects and OSP
+ * has no idea that the sequence need cleanup to be done.
+ * While this is very expensive operation, it's supposed to happen very very
+ * infrequently because sequence has 2^32 or 2^48 objects (depending on type)
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] osp OSP device
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
+ */
+static int osp_precreate_rollover_new_seq(struct lu_env *env,
+ struct osp_device *osp)
+{
+ struct lu_fid *fid = &osp_env_info(env)->osi_fid;
+ struct lu_fid *last_fid = &osp->opd_last_used_fid;
+ int rc;
+ ENTRY;
+
+ rc = seq_client_get_seq(env, osp->opd_obd->u.cli.cl_seq, &fid->f_seq);
+ if (rc != 0) {
+ CERROR("%s: alloc fid error: rc = %d\n",
+ osp->opd_obd->obd_name, rc);
+ RETURN(rc);
+ }
+
+ fid->f_oid = 1;
+ fid->f_ver = 0;
+ LASSERTF(fid_seq(fid) != fid_seq(last_fid),
+ "fid "DFID", last_fid "DFID"\n", PFID(fid),
+ PFID(last_fid));
+
+ rc = osp_write_last_oid_seq_files(env, osp, fid, 1);
+ if (rc != 0) {
+ CERROR("%s: Can not update oid/seq file: rc = %d\n",
+ osp->opd_obd->obd_name, rc);
+ RETURN(rc);
+ }
+
+ LCONSOLE_INFO("%s: update sequence from %#llx to %#llx\n",
+ osp->opd_obd->obd_name, fid_seq(last_fid),
+ fid_seq(fid));
+ /* Update last_xxx to the new seq */
+ spin_lock(&osp->opd_pre_lock);
+ osp->opd_last_used_fid = *fid;
+ osp_fid_to_obdid(fid, &osp->opd_last_id);
+ osp->opd_gap_start_fid = *fid;
+ osp->opd_pre_used_fid = *fid;
+ osp->opd_pre_last_created_fid = *fid;
+ spin_unlock(&osp->opd_pre_lock);
+
+ RETURN(rc);
+}
+
+/**
+ * Find IDs available in current sequence
+ *
+ * The function calculates the highest possible ID and the number of IDs
+ * available in the current sequence OSP is using. The number is limited
+ * artifically by the caller (grow param) and the number of IDs available
+ * in the sequence by nature. The function doesn't require an external
+ * locking.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] osp OSP device
+ * \param[in] fid FID the caller wants to start with
+ * \param[in] grow how many the caller wants
+ * \param[out] fid the highest calculated FID
+ * \param[out] grow the number of available IDs calculated
+ *
+ * \retval 0 on success, 1 - the sequence is empty
+ */
static int osp_precreate_fids(const struct lu_env *env, struct osp_device *osp,
struct lu_fid *fid, int *grow)
{
if (fid_is_idif(fid)) {
struct lu_fid *last_fid;
struct ost_id *oi = &osi->osi_oi;
+ int rc;
spin_lock(&osp->opd_pre_lock);
last_fid = &osp->opd_pre_last_created_fid;
- ostid_idif_pack(last_fid, oi);
- end = min(oi->oi_id + *grow, IDIF_MAX_OID);
- *grow = end - oi->oi_id;
- oi->oi_id += *grow;
+ fid_to_ostid(last_fid, oi);
+ end = min(ostid_id(oi) + *grow, IDIF_MAX_OID);
+ *grow = end - ostid_id(oi);
+ rc = ostid_set_id(oi, ostid_id(oi) + *grow);
spin_unlock(&osp->opd_pre_lock);
- if (*grow == 0)
+ if (*grow == 0 || rc)
return 1;
- ostid_idif_unpack(oi, fid, osp->opd_index);
+ ostid_to_fid(fid, oi, osp->opd_index);
return 0;
}
return *grow > 0 ? 0 : 1;
}
+/**
+ * Prepare and send precreate RPC
+ *
+ * The function finds how many objects should be precreated. Then allocates,
+ * prepares and schedules precreate RPC synchronously. Upon reply the function
+ * wake ups the threads waiting for the new objects on this target. If the
+ * target wasn't able to create all the objects requested, then the next
+ * precreate will be asking less objects (i.e. slow precreate down).
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] d OSP device
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
+ **/
static int osp_precreate_send(const struct lu_env *env, struct osp_device *d)
{
struct osp_thread_info *oti = osp_env_info(env);
}
spin_lock(&d->opd_pre_lock);
- if (d->opd_pre_grow_count > d->opd_pre_max_grow_count / 2)
- d->opd_pre_grow_count = d->opd_pre_max_grow_count / 2;
- grow = d->opd_pre_grow_count;
+ if (d->opd_pre_create_count > d->opd_pre_max_create_count / 2)
+ d->opd_pre_create_count = d->opd_pre_max_create_count / 2;
+ grow = d->opd_pre_create_count;
spin_unlock(&d->opd_pre_lock);
body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
LASSERT(body);
+ *fid = d->opd_pre_last_created_fid;
rc = osp_precreate_fids(env, d, fid, &grow);
- if (rc == 1) {
+ if (rc == 1)
/* Current seq has been used up*/
- if (!osp_is_fid_client(d)) {
- osp_pre_update_status(d, -ENOSPC);
- rc = -ENOSPC;
- }
- cfs_waitq_signal(&d->opd_pre_waitq);
- GOTO(out_req, rc);
- }
+ GOTO(out_req, rc = -ENOSPC);
if (!osp_is_fid_client(d)) {
/* Non-FID client will always send seq 0 because of
fid->f_seq = 0;
}
- ostid_fid_pack(fid, &body->oa.o_oi);
+ fid_to_ostid(fid, &body->oa.o_oi);
body->oa.o_valid = OBD_MD_FLGROUP;
ptlrpc_request_set_replen(req);
+ if (OBD_FAIL_CHECK(OBD_FAIL_OSP_FAKE_PRECREATE))
+ GOTO(ready, rc = 0);
+
rc = ptlrpc_queue_wait(req);
if (rc) {
CERROR("%s: can't precreate: rc = %d\n", d->opd_obd->obd_name,
if (body == NULL)
GOTO(out_req, rc = -EPROTO);
- fid_ostid_unpack(fid, &body->oa.o_oi, d->opd_index);
- LASSERTF(lu_fid_diff(fid, &d->opd_pre_used_fid) > 0,
- "reply fid "DFID" pre used fid "DFID"\n", PFID(fid),
- PFID(&d->opd_pre_used_fid));
+ ostid_to_fid(fid, &body->oa.o_oi, d->opd_index);
- CDEBUG(D_HA, "%s: new last_created "DFID"\n", d->opd_obd->obd_name,
- PFID(fid));
+ready:
+ if (osp_fid_diff(fid, &d->opd_pre_used_fid) <= 0) {
+ CERROR("%s: precreate fid "DFID" <= local used fid "DFID
+ ": rc = %d\n", d->opd_obd->obd_name,
+ PFID(fid), PFID(&d->opd_pre_used_fid), -ESTALE);
+ GOTO(out_req, rc = -ESTALE);
+ }
- diff = lu_fid_diff(fid, &d->opd_pre_last_created_fid);
+ diff = osp_fid_diff(fid, &d->opd_pre_last_created_fid);
spin_lock(&d->opd_pre_lock);
if (diff < grow) {
/* the OST has not managed to create all the
* objects we asked for */
- d->opd_pre_grow_count = max(diff, OST_MIN_PRECREATE);
- d->opd_pre_grow_slow = 1;
+ d->opd_pre_create_count = max(diff, OST_MIN_PRECREATE);
+ d->opd_pre_create_slow = 1;
} else {
/* the OST is able to keep up with the work,
- * we could consider increasing grow_count
+ * we could consider increasing create_count
* next time if needed */
- d->opd_pre_grow_slow = 0;
+ d->opd_pre_create_slow = 0;
}
+ body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
+ fid_to_ostid(fid, &body->oa.o_oi);
+
d->opd_pre_last_created_fid = *fid;
spin_unlock(&d->opd_pre_lock);
- CDEBUG(D_OTHER, "current precreated pool: "DFID"-"DFID"\n",
- PFID(&d->opd_pre_used_fid), PFID(&d->opd_pre_last_created_fid));
+ CDEBUG(D_HA, "%s: current precreated pool: "DFID"-"DFID"\n",
+ d->opd_obd->obd_name, PFID(&d->opd_pre_used_fid),
+ PFID(&d->opd_pre_last_created_fid));
out_req:
/* now we can wakeup all users awaiting for objects */
osp_pre_update_status(d, rc);
- cfs_waitq_signal(&d->opd_pre_user_waitq);
+ wake_up(&d->opd_pre_user_waitq);
ptlrpc_req_finished(req);
RETURN(rc);
}
-static int osp_get_lastfid_from_ost(struct osp_device *d)
+/**
+ * Get last precreated object from target (OST)
+ *
+ * Sends synchronous RPC to the target (OST) to learn the last precreated
+ * object. This later is used to remove all unused objects (cleanup orphan
+ * procedure). Also, the next object after one we got will be used as a
+ * starting point for the new precreates.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] d OSP device
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
+ **/
+static int osp_get_lastfid_from_ost(const struct lu_env *env,
+ struct osp_device *d)
{
struct ptlrpc_request *req = NULL;
struct obd_import *imp;
- struct lu_fid *last_fid = &d->opd_last_used_fid;
+ struct lu_fid *last_fid;
char *tmp;
int rc;
ENTRY;
if (req == NULL)
RETURN(-ENOMEM);
- req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
- RCL_CLIENT, sizeof(KEY_LAST_FID));
-
- req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
- RCL_CLIENT, sizeof(*last_fid));
+ req_capsule_set_size(&req->rq_pill, &RMF_GETINFO_KEY, RCL_CLIENT,
+ sizeof(KEY_LAST_FID));
rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_GET_INFO);
if (rc) {
RETURN(rc);
}
- tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
+ tmp = req_capsule_client_get(&req->rq_pill, &RMF_GETINFO_KEY);
memcpy(tmp, KEY_LAST_FID, sizeof(KEY_LAST_FID));
req->rq_no_delay = req->rq_no_resend = 1;
- fid_cpu_to_le(last_fid, last_fid);
- tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
- memcpy(tmp, last_fid, sizeof(*last_fid));
+ last_fid = req_capsule_client_get(&req->rq_pill, &RMF_FID);
+ fid_cpu_to_le(last_fid, &d->opd_last_used_fid);
+
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
}
last_fid = req_capsule_server_get(&req->rq_pill, &RMF_FID);
- if (last_fid == NULL || !fid_is_sane(last_fid)) {
+ if (last_fid == NULL) {
+ CERROR("%s: Got last_fid failed.\n", d->opd_obd->obd_name);
+ GOTO(out, rc = -EPROTO);
+ }
+
+ if (!fid_is_sane(last_fid)) {
CERROR("%s: Got insane last_fid "DFID"\n",
d->opd_obd->obd_name, PFID(last_fid));
GOTO(out, rc = -EPROTO);
if (fid_oid(last_fid) > 0)
d->opd_last_used_fid = *last_fid;
- CDEBUG(D_HA, "%s: Got insane last_fid "DFID"\n", d->opd_obd->obd_name,
+ CDEBUG(D_HA, "%s: Got last_fid "DFID"\n", d->opd_obd->obd_name,
PFID(last_fid));
out:
}
/**
- * asks OST to clean precreate orphans
- * and gets next id for new objects
+ * Cleanup orphans on OST
+ *
+ * This function is called in a contex of a dedicated thread handling
+ * all the precreation suff. The function waits till local recovery
+ * is complete, then identify all the unreferenced objects (orphans)
+ * using the highest ID referenced by a local and the highest object
+ * precreated by the target. The found range is a subject to removal
+ * using specially flagged RPC. During this process OSP is marked
+ * unavailable for new objects.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] d OSP device
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
*/
static int osp_precreate_cleanup_orphans(struct lu_env *env,
struct osp_device *d)
LASSERT(!fid_is_zero(last_fid));
if (fid_oid(&d->opd_last_used_fid) < 2) {
/* lastfid looks strange... ask OST */
- rc = osp_get_lastfid_from_ost(d);
+ rc = osp_get_lastfid_from_ost(env, d);
if (rc)
GOTO(out, rc);
}
body->oa.o_flags = OBD_FL_DELORPHAN;
body->oa.o_valid = OBD_MD_FLFLAGS | OBD_MD_FLGROUP;
- if (osp_is_fid_client(d))
- body->oa.o_seq = fid_seq(&d->opd_last_used_fid);
- else
- body->oa.o_seq = 0;
- /* remove from NEXT after used one */
- body->oa.o_id = fid_oid(&d->opd_last_used_fid);
+
+ fid_to_ostid(&d->opd_last_used_fid, &body->oa.o_oi);
ptlrpc_request_set_replen(req);
/*
* OST provides us with id new pool starts from in body->oa.o_id
*/
- fid_ostid_unpack(last_fid, &body->oa.o_oi, d->opd_index);
- CDEBUG(D_INFO, "%s: last_fid "DFID" server last fid "DFID"\n",
- d->opd_obd->obd_name, PFID(&d->opd_last_used_fid),
- PFID(last_fid));
+ ostid_to_fid(last_fid, &body->oa.o_oi, d->opd_index);
spin_lock(&d->opd_pre_lock);
- diff = lu_fid_diff(&d->opd_last_used_fid, last_fid);
+ diff = osp_fid_diff(&d->opd_last_used_fid, last_fid);
if (diff > 0) {
- d->opd_pre_grow_count = OST_MIN_PRECREATE + diff;
+ d->opd_pre_create_count = OST_MIN_PRECREATE + diff;
d->opd_pre_last_created_fid = d->opd_last_used_fid;
} else {
- d->opd_pre_grow_count = OST_MIN_PRECREATE;
+ d->opd_pre_create_count = OST_MIN_PRECREATE;
d->opd_pre_last_created_fid = *last_fid;
}
/*
LASSERT(fid_oid(&d->opd_pre_last_created_fid) <=
LUSTRE_DATA_SEQ_MAX_WIDTH);
d->opd_pre_used_fid = d->opd_pre_last_created_fid;
- d->opd_pre_grow_slow = 0;
+ d->opd_pre_create_slow = 0;
spin_unlock(&d->opd_pre_lock);
CDEBUG(D_HA, "%s: Got last_id "DFID" from OST, last_created "DFID
if (req)
ptlrpc_req_finished(req);
- d->opd_pre_recovering = 0;
-
/*
* If rc is zero, the pre-creation window should have been emptied.
* Since waking up the herd would be useless without pre-created
* this OSP isn't quite functional yet */
osp_pre_update_status(d, rc);
} else {
- cfs_waitq_signal(&d->opd_pre_user_waitq);
+ wake_up(&d->opd_pre_user_waitq);
}
+ } else {
+ spin_lock(&d->opd_pre_lock);
+ d->opd_pre_recovering = 0;
+ spin_unlock(&d->opd_pre_lock);
}
RETURN(rc);
}
-/*
+/**
+ * Update precreate status using statfs data
+ *
+ * The function decides whether this OSP should be used for new objects.
+ * IOW, whether this OST is used up or has some free space. Cached statfs
+ * data is used to make this decision. If the latest result of statfs
+ * request (rc argument) is not success, then just mark OSP unavailable
+ * right away.
+
+ * Add a bit of hysteresis so this flag isn't continually flapping,
+ * and ensure that new files don't get extremely fragmented due to
+ * only a small amount of available space in the filesystem.
+ * We want to set the ENOSPC when there is less than reserved size
+ * free and clear it when there is at least 2*reserved size free space.
* the function updates current precreation status used: functional or not
*
- * rc is a last code from the transport, rc == 0 meaning transport works
- * well and users of lod can use objects from this OSP
+ * \param[in] d OSP device
+ * \param[in] rc new precreate status for device \a d
*
- * the status depends on current usage of OST
+ * \retval 0 on success
+ * \retval negative negated errno on error
*/
void osp_pre_update_status(struct osp_device *d, int rc)
{
struct obd_statfs *msfs = &d->opd_statfs;
int old = d->opd_pre_status;
- __u64 used;
+ __u64 available;
d->opd_pre_status = rc;
if (rc)
goto out;
- /* Add a bit of hysteresis so this flag isn't continually flapping,
- * and ensure that new files don't get extremely fragmented due to
- * only a small amount of available space in the filesystem.
- * We want to set the NOSPC flag when there is less than ~0.1% free
- * and clear it when there is at least ~0.2% free space, so:
- * avail < ~0.1% max max = avail + used
- * 1025 * avail < avail + used used = blocks - free
- * 1024 * avail < used
- * 1024 * avail < blocks - free
- * avail < ((blocks - free) >> 10)
- *
- * On very large disk, say 16TB 0.1% will be 16 GB. We don't want to
- * lose that amount of space so in those cases we report no space left
- * if their is less than 1 GB left. */
if (likely(msfs->os_type)) {
- used = min_t(__u64, (msfs->os_blocks - msfs->os_bfree) >> 10,
- 1 << 30);
- if ((msfs->os_ffree < 32) || (msfs->os_bavail < used)) {
+ if (unlikely(d->opd_reserved_mb_high == 0 &&
+ d->opd_reserved_mb_low == 0)) {
+ /* Use ~0.1% by default to disable object allocation,
+ * and ~0.2% to enable, size in MB, set both watermark
+ */
+ spin_lock(&d->opd_pre_lock);
+ if (d->opd_reserved_mb_high == 0 &&
+ d->opd_reserved_mb_low == 0) {
+ d->opd_reserved_mb_low =
+ ((msfs->os_bsize >> 10) *
+ msfs->os_blocks) >> 20;
+ if (d->opd_reserved_mb_low == 0)
+ d->opd_reserved_mb_low = 1;
+ d->opd_reserved_mb_high =
+ (d->opd_reserved_mb_low << 1) + 1;
+ }
+ spin_unlock(&d->opd_pre_lock);
+ }
+ /* in MB */
+ available = (msfs->os_bavail * (msfs->os_bsize >> 10)) >> 10;
+ if (msfs->os_ffree < 32)
+ msfs->os_state |= OS_STATE_ENOINO;
+ else if (msfs->os_ffree > 64)
+ msfs->os_state &= ~OS_STATE_ENOINO;
+
+ CDEBUG(D_INFO, "%s: status: %llu blocks, %llu "
+ "free, %llu avail, %llu MB avail, %u "
+ "hwm -> %d: rc = %d\n",
+ d->opd_obd->obd_name, msfs->os_blocks,
+ msfs->os_bfree, msfs->os_bavail,
+ available, d->opd_reserved_mb_high,
+ d->opd_pre_status, rc);
+ if (available < d->opd_reserved_mb_low)
+ msfs->os_state |= OS_STATE_ENOSPC;
+ else if (available > d->opd_reserved_mb_high)
+ msfs->os_state &= ~OS_STATE_ENOSPC;
+ if (msfs->os_state & (OS_STATE_ENOINO | OS_STATE_ENOSPC)) {
d->opd_pre_status = -ENOSPC;
if (old != -ENOSPC)
- CDEBUG(D_INFO, "%s: status: "LPU64" blocks, "
- LPU64" free, "LPU64" used, "LPU64" "
- "avail -> %d: rc = %d\n",
+ CDEBUG(D_INFO, "%s: status: %llu blocks, %llu "
+ "free, %llu avail, %llu MB avail, %u "
+ "hwm -> %d: rc = %d\n",
d->opd_obd->obd_name, msfs->os_blocks,
- msfs->os_bfree, used, msfs->os_bavail,
+ msfs->os_bfree, msfs->os_bavail,
+ available, d->opd_reserved_mb_high,
d->opd_pre_status, rc);
CDEBUG(D_INFO,
- "non-commited changes: %lu, in progress: %u\n",
- d->opd_syn_changes, d->opd_syn_rpc_in_progress);
- } else if (old == -ENOSPC) {
+ "non-committed changes: %u, in progress: %u\n",
+ atomic_read(&d->opd_sync_changes),
+ atomic_read(&d->opd_sync_rpcs_in_progress));
+ } else if (unlikely(old == -ENOSPC)) {
d->opd_pre_status = 0;
- d->opd_pre_grow_slow = 0;
- d->opd_pre_grow_count = OST_MIN_PRECREATE;
- cfs_waitq_signal(&d->opd_pre_waitq);
- CDEBUG(D_INFO, "%s: no space: "LPU64" blocks, "LPU64
- " free, "LPU64" used, "LPU64" avail -> %d: "
- "rc = %d\n", d->opd_obd->obd_name,
- msfs->os_blocks, msfs->os_bfree, used,
- msfs->os_bavail, d->opd_pre_status, rc);
+ spin_lock(&d->opd_pre_lock);
+ d->opd_pre_create_slow = 0;
+ d->opd_pre_create_count = OST_MIN_PRECREATE;
+ spin_unlock(&d->opd_pre_lock);
+ wake_up(&d->opd_pre_waitq);
+
+ CDEBUG(D_INFO, "%s: space available: %llu blocks, %llu"
+ " free, %llu avail, %lluMB avail, %u lwm"
+ " -> %d: rc = %d\n", d->opd_obd->obd_name,
+ msfs->os_blocks, msfs->os_bfree, msfs->os_bavail,
+ available, d->opd_reserved_mb_low,
+ d->opd_pre_status, rc);
}
- }
+ /* Object precreation is skipped on the OST with
+ * max_create_count=0. */
+ if (d->opd_pre_max_create_count == 0)
+ msfs->os_state |= OS_STATE_NOPRECREATE;
+ else
+ msfs->os_state &= ~OS_STATE_NOPRECREATE;
+ }
out:
- cfs_waitq_signal(&d->opd_pre_user_waitq);
+ wake_up(&d->opd_pre_user_waitq);
}
-static int osp_init_pre_fid(struct osp_device *osp)
+/**
+ * Initialize FID for precreation
+ *
+ * For a just created new target, a new sequence should be taken.
+ * The function checks there is no IDIF in use (if the target was
+ * added with the older version of Lustre), then requests a new
+ * sequence from FLDB using the regular protocol. Then this new
+ * sequence is stored on a persisten storage synchronously to prevent
+ * possible object leakage (for the detail see the description for
+ * osp_precreate_rollover_new_seq()).
+ *
+ * \param[in] osp OSP device
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
+ */
+int osp_init_pre_fid(struct osp_device *osp)
{
struct lu_env env;
struct osp_thread_info *osi;
int rc;
ENTRY;
- /* Return if last_used fid has been initialized */
+ LASSERT(osp->opd_pre != NULL);
+
+ /* Let's check if the current last_seq/fid is valid,
+ * otherwise request new sequence from the controller */
+ if (osp_is_fid_client(osp) && osp->opd_group != 0) {
+ /* Non-MDT0 can only use normal sequence for
+ * OST objects */
+ if (fid_is_norm(&osp->opd_last_used_fid))
+ RETURN(0);
+ } else {
+ /* Initially MDT0 will start with IDIF, after
+ * that it will request new sequence from the
+ * controller */
+ if (fid_is_idif(&osp->opd_last_used_fid) ||
+ fid_is_norm(&osp->opd_last_used_fid))
+ RETURN(0);
+ }
+
if (!fid_is_zero(&osp->opd_last_used_fid))
- RETURN(0);
+ CWARN("%s: invalid last used fid "DFID
+ ", try to get new sequence.\n",
+ osp->opd_obd->obd_name,
+ PFID(&osp->opd_last_used_fid));
rc = lu_env_init(&env, osp->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
if (rc) {
last_fid = &osi->osi_fid;
fid_zero(last_fid);
/* For a freshed fs, it will allocate a new sequence first */
- if (osp_is_fid_client(osp)) {
+ if (osp_is_fid_client(osp) && osp->opd_group != 0) {
cli_seq = osp->opd_obd->u.cli.cl_seq;
rc = seq_client_get_seq(&env, cli_seq, &last_fid->f_seq);
if (rc != 0) {
GOTO(out, rc);
}
} else {
- last_fid->f_seq = fid_idif_seq(1, osp->opd_index);
+ last_fid->f_seq = fid_idif_seq(0, osp->opd_index);
}
last_fid->f_oid = 1;
last_fid->f_ver = 0;
RETURN(rc);
}
+/**
+ * The core of precreate functionality
+ *
+ * The function implements the main precreation loop. Basically it
+ * involves connecting to the target, precerate FID initialization,
+ * identifying and removing orphans, then serving precreation. As
+ * part of the latter, the thread is responsible for statfs data
+ * updates. The precreation is mostly driven by another threads
+ * asking for new OST objects - those askers wake the thread when
+ * the number of precreated objects reach low watermark.
+ * After a disconnect, the sequence above repeats. This is keep going
+ * until the thread is requested to stop.
+ *
+ * \param[in] _arg private data the thread (OSP device to handle)
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
+ */
static int osp_precreate_thread(void *_arg)
{
struct osp_device *d = _arg;
struct ptlrpc_thread *thread = &d->opd_pre_thread;
struct l_wait_info lwi = { 0 };
- char pname[16];
+ struct l_wait_info lwi2 = LWI_TIMEOUT(cfs_time_seconds(5),
+ back_to_sleep, NULL);
struct lu_env env;
int rc;
ENTRY;
- sprintf(pname, "osp-pre-%u\n", d->opd_index);
- cfs_daemonize(pname);
-
rc = lu_env_init(&env, d->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
if (rc) {
CERROR("%s: init env error: rc = %d\n", d->opd_obd->obd_name,
rc);
+
+ spin_lock(&d->opd_pre_lock);
+ thread->t_flags = SVC_STOPPED;
+ spin_unlock(&d->opd_pre_lock);
+ wake_up(&thread->t_ctl_waitq);
+
RETURN(rc);
}
spin_lock(&d->opd_pre_lock);
thread->t_flags = SVC_RUNNING;
spin_unlock(&d->opd_pre_lock);
- cfs_waitq_signal(&thread->t_ctl_waitq);
+ wake_up(&thread->t_ctl_waitq);
while (osp_precreate_running(d)) {
/*
* need to be connected to OST
*/
while (osp_precreate_running(d)) {
+ if ((d->opd_pre == NULL || d->opd_pre_recovering) &&
+ d->opd_imp_connected &&
+ !d->opd_got_disconnected)
+ break;
l_wait_event(d->opd_pre_waitq,
!osp_precreate_running(d) ||
d->opd_new_connection,
&lwi);
- if (!osp_precreate_running(d))
- break;
-
if (!d->opd_new_connection)
continue;
break;
}
- if (d->opd_obd->u.cli.cl_seq->lcs_exp == NULL) {
- /* Get new sequence for client first */
- LASSERT(d->opd_exp != NULL);
- d->opd_obd->u.cli.cl_seq->lcs_exp =
- class_export_get(d->opd_exp);
+ if (!osp_precreate_running(d))
+ break;
+
+ if (d->opd_pre) {
+ LASSERT(d->opd_obd->u.cli.cl_seq != NULL);
+ /* Sigh, fid client is not ready yet */
+ if (d->opd_obd->u.cli.cl_seq->lcs_exp == NULL)
+ continue;
+
+ /* Init fid for osp_precreate if necessary */
rc = osp_init_pre_fid(d);
if (rc != 0) {
class_export_put(d->opd_exp);
d->opd_obd->u.cli.cl_seq->lcs_exp = NULL;
CERROR("%s: init pre fid error: rc = %d\n",
- d->opd_obd->obd_name, rc);
+ d->opd_obd->obd_name, rc);
continue;
}
}
- osp_statfs_update(d);
-
- /*
- * Clean up orphans or recreate missing objects.
- */
- rc = osp_precreate_cleanup_orphans(&env, d);
- if (rc != 0)
+ if (osp_statfs_update(&env, d)) {
+ l_wait_event(d->opd_pre_waitq,
+ !osp_precreate_running(d), &lwi2);
continue;
+ }
+
+ if (d->opd_pre) {
+ /*
+ * Clean up orphans or recreate missing objects.
+ */
+ rc = osp_precreate_cleanup_orphans(&env, d);
+ if (rc != 0) {
+ schedule_timeout_interruptible(cfs_time_seconds(1));
+ continue;
+ }
+ }
+
/*
* connected, can handle precreates now
*/
break;
if (osp_statfs_need_update(d))
- osp_statfs_update(d);
+ if (osp_statfs_update(&env, d))
+ break;
+
+ if (d->opd_pre == NULL)
+ continue;
+
+ /* To avoid handling different seq in precreate/orphan
+ * cleanup, it will hold precreate until current seq is
+ * used up. */
+ if (unlikely(osp_precreate_end_seq(&env, d) &&
+ !osp_create_end_seq(&env, d)))
+ continue;
+
+ if (unlikely(osp_precreate_end_seq(&env, d) &&
+ osp_create_end_seq(&env, d))) {
+ LCONSOLE_INFO("%s:%#llx is used up."
+ " Update to new seq\n",
+ d->opd_obd->obd_name,
+ fid_seq(&d->opd_pre_last_created_fid));
+ rc = osp_precreate_rollover_new_seq(&env, d);
+ if (rc)
+ continue;
+ }
if (osp_precreate_near_empty(&env, d)) {
rc = osp_precreate_send(&env, d);
thread->t_flags = SVC_STOPPED;
lu_env_fini(&env);
- cfs_waitq_signal(&thread->t_ctl_waitq);
+ wake_up(&thread->t_ctl_waitq);
RETURN(0);
}
+/**
+ * Check when to stop to wait for precreate objects.
+ *
+ * The caller wanting a new OST object can't wait undefinitely. The
+ * function checks for few conditions including available new OST
+ * objects, disconnected OST, lack of space with no pending destroys,
+ * etc. IOW, it checks whether the current OSP state is good to keep
+ * waiting or it's better to give up.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] d OSP device
+ *
+ * \retval 0 - keep waiting, 1 - no luck
+ */
static int osp_precreate_ready_condition(const struct lu_env *env,
struct osp_device *d)
{
if (d->opd_pre_reserved + 1 < osp_objs_precreated(env, d))
return 1;
- /* ready if OST reported no space and no destoys in progress */
- if (d->opd_syn_changes + d->opd_syn_rpc_in_progress == 0 &&
+ /* ready if OST reported no space and no destroys in progress */
+ if (atomic_read(&d->opd_sync_changes) +
+ atomic_read(&d->opd_sync_rpcs_in_progress) == 0 &&
d->opd_pre_status == -ENOSPC)
return 1;
+ /* Bail out I/O fails to OST */
+ if (d->opd_pre_status != 0 &&
+ d->opd_pre_status != -EAGAIN &&
+ d->opd_pre_status != -ENODEV &&
+ d->opd_pre_status != -ENOTCONN &&
+ d->opd_pre_status != -ENOSPC) {
+ /* DEBUG LU-3230 */
+ if (d->opd_pre_status != -EIO)
+ CERROR("%s: precreate failed opd_pre_status %d\n",
+ d->opd_obd->obd_name, d->opd_pre_status);
+ return 1;
+ }
+
return 0;
}
{
struct osp_device *d = data;
- LCONSOLE_WARN("%s: slow creates, last="DFID", next="DFID", "
- "reserved="LPU64", syn_changes=%lu, "
- "syn_rpc_in_progress=%d, status=%d\n",
- d->opd_obd->obd_name, PFID(&d->opd_pre_last_created_fid),
- PFID(&d->opd_pre_used_fid), d->opd_pre_reserved,
- d->opd_syn_changes, d->opd_syn_rpc_in_progress,
- d->opd_pre_status);
+ CDEBUG(D_HA, "%s: slow creates, last="DFID", next="DFID", "
+ "reserved=%llu, sync_changes=%u, "
+ "sync_rpcs_in_progress=%d, status=%d\n",
+ d->opd_obd->obd_name, PFID(&d->opd_pre_last_created_fid),
+ PFID(&d->opd_pre_used_fid), d->opd_pre_reserved,
+ atomic_read(&d->opd_sync_changes),
+ atomic_read(&d->opd_sync_rpcs_in_progress),
+ d->opd_pre_status);
return 1;
}
-/*
- * called to reserve object in the pool
- * return codes:
- * ENOSPC - no space on corresponded OST
- * EAGAIN - precreation is in progress, try later
- * EIO - no access to OST
+/**
+ * Reserve object in precreate pool
+ *
+ * When the caller wants to create a new object on this target (target
+ * represented by the given OSP), it should declare this intention using
+ * a regular ->dt_declare_create() OSD API method. Then OSP will be trying
+ * to reserve an object in the existing precreated pool or wait up to
+ * obd_timeout for the available object to appear in the pool (a dedicated
+ * thread will be doing real precreation in background). The object can be
+ * consumed later with osp_precreate_get_fid() or be released with call to
+ * lu_object_put(). Notice the function doesn't reserve a specific ID, just
+ * some ID. The actual ID assignment happen in osp_precreate_get_fid().
+ * If the space on the target is short and there is a pending object destroy,
+ * then the function forces local commit to speedup space release (see
+ * osp_sync.c for the details).
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] d OSP device
+ *
+ * \retval 0 on success
+ * \retval -ENOSPC when no space on OST
+ * \retval -EAGAIN try later, slow precreation in progress
+ * \retval -EIO when no access to OST
*/
int osp_precreate_reserve(const struct lu_env *env, struct osp_device *d)
{
- struct l_wait_info lwi;
- cfs_time_t expire = cfs_time_shift(obd_timeout);
- int precreated, rc;
- int count = 0;
+ time64_t expire = ktime_get_seconds() + obd_timeout;
+ struct l_wait_info lwi;
+ int precreated, rc, synced = 0;
ENTRY;
"Next FID "DFID"\n", PFID(&d->opd_pre_last_created_fid),
PFID(&d->opd_pre_used_fid));
+ /* opd_pre_max_create_count 0 to not use specified OST. */
+ if (d->opd_pre_max_create_count == 0)
+ RETURN(-ENOBUFS);
+
/*
* wait till:
* - preallocation is done
* - OST can allocate fid sequence.
*/
while ((rc = d->opd_pre_status) == 0 || rc == -ENOSPC ||
- rc == -ENODEV || rc == -EAGAIN) {
-
-#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 3, 90, 0)
- /*
- * to address Andreas's concern on possible busy-loop
- * between this thread and osp_precreate_send()
- */
- if (unlikely(count++ == 1000)) {
- osp_precreate_timeout_condition(d);
- LBUG();
- }
-#endif
+ rc == -ENODEV || rc == -EAGAIN || rc == -ENOTCONN) {
/*
* increase number of precreations
*/
precreated = osp_objs_precreated(env, d);
- if (d->opd_pre_grow_count < d->opd_pre_max_grow_count &&
- d->opd_pre_grow_slow == 0 &&
- precreated <= (d->opd_pre_grow_count / 4 + 1)) {
+ if (d->opd_pre_create_count < d->opd_pre_max_create_count &&
+ d->opd_pre_create_slow == 0 &&
+ precreated <= (d->opd_pre_create_count / 4 + 1)) {
spin_lock(&d->opd_pre_lock);
- d->opd_pre_grow_slow = 1;
- d->opd_pre_grow_count *= 2;
+ d->opd_pre_create_slow = 1;
+ d->opd_pre_create_count *= 2;
spin_unlock(&d->opd_pre_lock);
}
rc = 0;
/* XXX: don't wake up if precreation is in progress */
- if (osp_precreate_near_empty_nolock(env, d))
- cfs_waitq_signal(&d->opd_pre_waitq);
+ if (osp_precreate_near_empty_nolock(env, d) &&
+ !osp_precreate_end_seq_nolock(env, d))
+ wake_up(&d->opd_pre_waitq);
break;
}
* wait till that is done - some space might be released
*/
if (unlikely(rc == -ENOSPC)) {
- if (d->opd_syn_changes) {
+ if (atomic_read(&d->opd_sync_changes) && synced == 0) {
/* force local commit to release space */
dt_commit_async(env, d->opd_storage);
+ osp_sync_check_for_work(d);
+ synced = 1;
}
- if (d->opd_syn_rpc_in_progress) {
+ if (atomic_read(&d->opd_sync_rpcs_in_progress)) {
/* just wait till destroys are done */
/* see l_wait_even() few lines below */
}
- if (d->opd_syn_changes +
- d->opd_syn_rpc_in_progress == 0) {
+ if (atomic_read(&d->opd_sync_changes) +
+ atomic_read(&d->opd_sync_rpcs_in_progress) == 0) {
/* no hope for free space */
break;
}
}
/* XXX: don't wake up if precreation is in progress */
- cfs_waitq_signal(&d->opd_pre_waitq);
+ wake_up(&d->opd_pre_waitq);
- lwi = LWI_TIMEOUT(expire - cfs_time_current(),
- osp_precreate_timeout_condition, d);
- if (cfs_time_aftereq(cfs_time_current(), expire))
+ lwi = LWI_TIMEOUT(cfs_time_seconds(obd_timeout),
+ osp_precreate_timeout_condition, d);
+ if (ktime_get_seconds() >= expire) {
+ rc = -ETIMEDOUT;
break;
+ }
l_wait_event(d->opd_pre_user_waitq,
osp_precreate_ready_condition(env, d), &lwi);
RETURN(rc);
}
-/*
- * this function relies on reservation made before
+/**
+ * Get a FID from precreation pool
+ *
+ * The function is a companion for osp_precreate_reserve() - it assigns
+ * a specific FID from the precreate. The function should be called only
+ * if the call to osp_precreate_reserve() was successful. The function
+ * updates a local storage to remember the highest object ID referenced
+ * by the node in the given sequence.
+ *
+ * A very importan details: this is supposed to be called once the
+ * transaction is started, so on-disk update will be atomic with the
+ * data (like LOVEA) refering this object. Then the object won't be leaked:
+ * either it's referenced by the committed transaction or it's a subject
+ * to the orphan cleanup procedure.
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] d OSP device
+ * \param[out] fid generated FID
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
*/
int osp_precreate_get_fid(const struct lu_env *env, struct osp_device *d,
struct lu_fid *fid)
{
+ struct lu_fid *pre_used_fid = &d->opd_pre_used_fid;
/* grab next id from the pool */
spin_lock(&d->opd_pre_lock);
- LASSERTF(lu_fid_diff(&d->opd_pre_used_fid,
+ LASSERTF(osp_fid_diff(&d->opd_pre_used_fid,
&d->opd_pre_last_created_fid) < 0,
"next fid "DFID" last created fid "DFID"\n",
PFID(&d->opd_pre_used_fid),
PFID(&d->opd_pre_last_created_fid));
+ /*
+ * When sequence is used up, new one should be allocated in
+ * osp_precreate_rollover_new_seq. So ASSERT here to avoid
+ * objid overflow.
+ */
+ LASSERTF(osp_fid_end_seq(env, pre_used_fid) == 0,
+ "next fid "DFID" last created fid "DFID"\n",
+ PFID(&d->opd_pre_used_fid),
+ PFID(&d->opd_pre_last_created_fid));
+ /* Non IDIF fids shoulnd't get here with oid == 0xFFFFFFFF. */
+ if (fid_is_idif(pre_used_fid) &&
+ unlikely(fid_oid(pre_used_fid) == LUSTRE_DATA_SEQ_MAX_WIDTH))
+ pre_used_fid->f_seq++;
+
d->opd_pre_used_fid.f_oid++;
memcpy(fid, &d->opd_pre_used_fid, sizeof(*fid));
d->opd_pre_reserved--;
* all reservations are released, see comment in
* osp_precreate_thread() just before orphan cleanup
*/
- if (unlikely(d->opd_pre_reserved == 0 && d->opd_pre_status))
- cfs_waitq_signal(&d->opd_pre_waitq);
+ if (unlikely(d->opd_pre_reserved == 0 &&
+ (d->opd_pre_recovering || d->opd_pre_status)))
+ wake_up(&d->opd_pre_waitq);
return 0;
}
/*
+ * Set size regular attribute on an object
+ *
+ * When a striping is created late, it's possible that size is already
+ * initialized on the file. Then the new striping should inherit size
+ * from the file. The function sets size on the object using the regular
+ * protocol (OST_PUNCH).
+ * XXX: should be re-implemented using OUT ?
+ *
+ * \param[in] env LU environment provided by the caller
+ * \param[in] dt object
+ * \param[in] size size to set.
*
+ * \retval 0 on success
+ * \retval negative negated errno on error
*/
int osp_object_truncate(const struct lu_env *env, struct dt_object *dt,
__u64 size)
if (req == NULL)
RETURN(-ENOMEM);
- /* XXX: capa support? */
- /* osc_set_capa_size(req, &RMF_CAPA1, capa); */
rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_PUNCH);
if (rc) {
ptlrpc_request_free(req);
* XXX: decide how do we do here with resend
* if we don't resend, then client may see wrong file size
* if we do resend, then MDS thread can get stuck for quite long
+ * and if we don't resend, then client will also get -EWOULDBLOCK !!
+ * (see LU-7975 and sanity/test_27F use cases)
+ * but let's decide not to resend/delay this truncate request to OST
+ * and allow Client to decide to resend, in a less agressive way from
+ * after_reply(), by returning -EINPROGRESS instead of
+ * -EAGAIN/-EWOULDBLOCK upon return from ptlrpc_queue_wait() at the
+ * end of this routine
*/
req->rq_no_resend = req->rq_no_delay = 1;
if (oa == NULL)
GOTO(out, rc = -ENOMEM);
- rc = fid_ostid_pack(lu_object_fid(&dt->do_lu), &oa->o_oi);
+ rc = fid_to_ostid(lu_object_fid(&dt->do_lu), &oa->o_oi);
LASSERT(rc == 0);
oa->o_size = size;
oa->o_blocks = OBD_OBJECT_EOF;
body = req_capsule_client_get(&req->rq_pill, &RMF_OST_BODY);
LASSERT(body);
- lustre_set_wire_obdo(&body->oa, oa);
+ lustre_set_wire_obdo(&req->rq_import->imp_connect_data, &body->oa, oa);
/* XXX: capa support? */
/* osc_pack_capa(req, body, capa); */
ptlrpc_request_set_replen(req);
rc = ptlrpc_queue_wait(req);
- if (rc)
- CERROR("can't punch object: %d\n", rc);
+ if (rc) {
+ /* -EWOULDBLOCK/-EAGAIN means OST is unreachable at the moment
+ * since we have decided not to resend/delay, but this could
+ * lead to wrong size to be seen at Client side and even process
+ * trying to open to exit/fail if not itself handling -EAGAIN.
+ * So it should be better to return -EINPROGRESS instead and
+ * leave the decision to resend at Client side in after_reply()
+ */
+ if (rc == -EWOULDBLOCK) {
+ rc = -EINPROGRESS;
+ CDEBUG(D_HA, "returning -EINPROGRESS instead of "
+ "-EWOULDBLOCK/-EAGAIN to allow Client to "
+ "resend\n");
+ } else {
+ CERROR("can't punch object: %d\n", rc);
+ }
+ }
out:
ptlrpc_req_finished(req);
if (oa)
RETURN(rc);
}
+/**
+ * Initialize precreation functionality of OSP
+ *
+ * Prepares all the internal structures and starts the precreate thread
+ *
+ * \param[in] d OSP device
+ *
+ * \retval 0 on success
+ * \retval negative negated errno on error
+ */
int osp_init_precreate(struct osp_device *d)
{
- struct l_wait_info lwi = { 0 };
- int rc;
-
ENTRY;
+ OBD_ALLOC_PTR(d->opd_pre);
+ if (d->opd_pre == NULL)
+ RETURN(-ENOMEM);
+
/* initially precreation isn't ready */
+ init_waitqueue_head(&d->opd_pre_user_waitq);
d->opd_pre_status = -EAGAIN;
fid_zero(&d->opd_pre_used_fid);
d->opd_pre_used_fid.f_oid = 1;
fid_zero(&d->opd_pre_last_created_fid);
d->opd_pre_last_created_fid.f_oid = 1;
+ d->opd_last_id = 0;
d->opd_pre_reserved = 0;
d->opd_got_disconnected = 1;
- d->opd_pre_grow_slow = 0;
- d->opd_pre_grow_count = OST_MIN_PRECREATE;
- d->opd_pre_min_grow_count = OST_MIN_PRECREATE;
- d->opd_pre_max_grow_count = OST_MAX_PRECREATE;
+ d->opd_pre_create_slow = 0;
+ d->opd_pre_create_count = OST_MIN_PRECREATE;
+ d->opd_pre_min_create_count = OST_MIN_PRECREATE;
+ d->opd_pre_max_create_count = OST_MAX_PRECREATE;
+ d->opd_reserved_mb_high = 0;
+ d->opd_reserved_mb_low = 0;
+
+ RETURN(0);
+}
+
+/**
+ * Finish precreate functionality of OSP
+ *
+ *
+ * Asks all the activity (the thread, update timer) to stop, then
+ * wait till that is done.
+ *
+ * \param[in] d OSP device
+ */
+void osp_precreate_fini(struct osp_device *d)
+{
+ ENTRY;
+
+ if (d->opd_pre == NULL)
+ RETURN_EXIT;
+
+ OBD_FREE_PTR(d->opd_pre);
+ d->opd_pre = NULL;
+
+ EXIT;
+}
+
+int osp_init_statfs(struct osp_device *d)
+{
+ struct l_wait_info lwi = { 0 };
+ struct task_struct *task;
+
+ ENTRY;
spin_lock_init(&d->opd_pre_lock);
- cfs_waitq_init(&d->opd_pre_waitq);
- cfs_waitq_init(&d->opd_pre_user_waitq);
- cfs_waitq_init(&d->opd_pre_thread.t_ctl_waitq);
+ init_waitqueue_head(&d->opd_pre_waitq);
+ thread_set_flags(&d->opd_pre_thread, SVC_INIT);
+ init_waitqueue_head(&d->opd_pre_thread.t_ctl_waitq);
/*
* Initialize statfs-related things
*/
- d->opd_statfs_maxage = 5; /* default update interval */
- d->opd_statfs_fresh_till = cfs_time_shift(-1000);
- CDEBUG(D_OTHER, "current %llu, fresh till %llu\n",
- (unsigned long long)cfs_time_current(),
- (unsigned long long)d->opd_statfs_fresh_till);
- cfs_timer_init(&d->opd_statfs_timer, osp_statfs_timer_cb, d);
+ d->opd_statfs_maxage = 5; /* defaultupdate interval */
+ d->opd_statfs_fresh_till = ktime_sub_ns(ktime_get(),
+ 1000 * NSEC_PER_SEC);
+ CDEBUG(D_OTHER, "current %lldns, fresh till %lldns\n",
+ ktime_get_ns(),
+ ktime_to_ns(d->opd_statfs_fresh_till));
+ cfs_timer_setup(&d->opd_statfs_timer, osp_statfs_timer_cb,
+ (unsigned long)d, 0);
+
+ if (d->opd_storage->dd_rdonly)
+ RETURN(0);
/*
* start thread handling precreation and statfs updates
*/
- rc = cfs_create_thread(osp_precreate_thread, d, 0);
- if (rc < 0) {
- CERROR("can't start precreate thread %d\n", rc);
- RETURN(rc);
+ task = kthread_run(osp_precreate_thread, d,
+ "osp-pre-%u-%u", d->opd_index, d->opd_group);
+ if (IS_ERR(task)) {
+ CERROR("can't start precreate thread %ld\n", PTR_ERR(task));
+ RETURN(PTR_ERR(task));
}
l_wait_event(d->opd_pre_thread.t_ctl_waitq,
RETURN(0);
}
-void osp_precreate_fini(struct osp_device *d)
+void osp_statfs_fini(struct osp_device *d)
{
struct ptlrpc_thread *thread = &d->opd_pre_thread;
-
ENTRY;
- cfs_timer_disarm(&d->opd_statfs_timer);
-
- thread->t_flags = SVC_STOPPING;
- cfs_waitq_signal(&d->opd_pre_waitq);
+ del_timer(&d->opd_statfs_timer);
- cfs_wait_event(thread->t_ctl_waitq, thread->t_flags & SVC_STOPPED);
+ if (!thread_is_init(thread) && !thread_is_stopped(thread)) {
+ thread->t_flags = SVC_STOPPING;
+ wake_up(&d->opd_pre_waitq);
+ wait_event(thread->t_ctl_waitq, thread_is_stopped(thread));
+ }
EXIT;
}
-
git://git.whamcloud.com / fs / lustre-release.git / blobdiff