#include <obd.h>
#include <obd_class.h>
+#include <lu_target.h>
#include <dt_object.h>
#include <md_object.h>
#include <obd_support.h>
return rc;
}
EXPORT_SYMBOL(seq_server_set_cli);
+/*
+ * allocate \a w units of sequence from range \a from.
+ */
+static inline void range_alloc(struct lu_seq_range *to,
+ struct lu_seq_range *from,
+ __u64 width)
+{
+ width = min(range_space(from), width);
+ to->lsr_start = from->lsr_start;
+ to->lsr_end = from->lsr_start + width;
+ from->lsr_start += width;
+}
/**
* On controller node, allocate new super sequence for regular sequence server.
*/
static int __seq_server_alloc_super(struct lu_server_seq *seq,
- struct lu_seq_range *in,
struct lu_seq_range *out,
const struct lu_env *env)
{
struct lu_seq_range *space = &seq->lss_space;
- struct thandle *th;
- __u64 mdt = out->lsr_mdt;
- int rc, credit;
+ int rc;
ENTRY;
LASSERT(range_is_sane(space));
- if (in != NULL) {
- CDEBUG(D_INFO, "%s: Input seq range: "
- DRANGE"\n", seq->lss_name, PRANGE(in));
-
- if (in->lsr_end > space->lsr_start)
- space->lsr_start = in->lsr_end;
- *out = *in;
-
- CDEBUG(D_INFO, "%s: Recovered space: "DRANGE"\n",
- seq->lss_name, PRANGE(space));
+ if (range_is_exhausted(space)) {
+ CERROR("%s: Sequences space is exhausted\n",
+ seq->lss_name);
+ RETURN(-ENOSPC);
} else {
- if (range_space(space) < seq->lss_width) {
- CWARN("%s: Sequences space to be exhausted soon. "
- "Only "LPU64" sequences left\n", seq->lss_name,
- range_space(space));
- *out = *space;
- space->lsr_start = space->lsr_end;
- } else if (range_is_exhausted(space)) {
- CERROR("%s: Sequences space is exhausted\n",
- seq->lss_name);
- RETURN(-ENOSPC);
- } else {
- range_alloc(out, space, seq->lss_width);
- }
- }
- out->lsr_mdt = mdt;
-
- credit = SEQ_TXN_STORE_CREDITS + FLD_TXN_INDEX_INSERT_CREDITS;
-
- th = seq_store_trans_start(seq, env, credit);
- if (IS_ERR(th))
- RETURN(PTR_ERR(th));
-
- rc = seq_store_write(seq, env, th);
- if (rc) {
- CERROR("%s: Can't write space data, rc %d\n",
- seq->lss_name, rc);
- goto out;
- }
-
- rc = fld_server_create(seq->lss_site->ms_server_fld,
- env, out, th);
- if (rc) {
- CERROR("%s: Can't Update fld database, rc %d\n",
- seq->lss_name, rc);
+ range_alloc(out, space, seq->lss_width);
}
-out:
- seq_store_trans_stop(seq, env, th);
+ rc = seq_store_update(env, seq, out, 1 /* sync */);
CDEBUG(D_INFO, "%s: super-sequence allocation rc = %d "
DRANGE"\n", seq->lss_name, rc, PRANGE(out));
}
int seq_server_alloc_super(struct lu_server_seq *seq,
- struct lu_seq_range *in,
struct lu_seq_range *out,
const struct lu_env *env)
{
ENTRY;
cfs_down(&seq->lss_sem);
- rc = __seq_server_alloc_super(seq, in, out, env);
+ rc = __seq_server_alloc_super(seq, out, env);
cfs_up(&seq->lss_sem);
RETURN(rc);
}
+static int __seq_set_init(const struct lu_env *env,
+ struct lu_server_seq *seq)
+{
+ struct lu_seq_range *space = &seq->lss_space;
+ int rc;
+
+ range_alloc(&seq->lss_lowater_set, space, seq->lss_set_width);
+ range_alloc(&seq->lss_hiwater_set, space, seq->lss_set_width);
+
+ rc = seq_store_update(env, seq, NULL, 1);
+ seq->lss_set_transno = 0;
+
+ return rc;
+}
+
+/*
+ * This function implements new seq allocation algorithm using async
+ * updates to seq file on disk. ref bug 18857 for details.
+ * there are four variable to keep track of this process
+ *
+ * lss_space; - available lss_space
+ * lss_lowater_set; - lu_seq_range for all seqs before barrier, i.e. safe to use
+ * lss_hiwater_set; - lu_seq_range after barrier, i.e. allocated but may be
+ * not yet committed
+ *
+ * when lss_lowater_set reaches the end it is replaced with hiwater one and
+ * a write operation is initiated to allocate new hiwater range.
+ * if last seq write opearion is still not commited, current operation is
+ * flaged as sync write op.
+ */
+static int range_alloc_set(const struct lu_env *env,
+ struct lu_seq_range *out,
+ struct lu_server_seq *seq)
+{
+ struct lu_seq_range *space = &seq->lss_space;
+ struct lu_seq_range *loset = &seq->lss_lowater_set;
+ struct lu_seq_range *hiset = &seq->lss_hiwater_set;
+ int rc = 0;
+
+ if (range_is_zero(loset))
+ __seq_set_init(env, seq);
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_SEQ_ALLOC)) /* exhaust set */
+ loset->lsr_start = loset->lsr_end;
+
+ if (range_is_exhausted(loset)) {
+ /* reached high water mark. */
+ struct lu_device *dev = seq->lss_site->ms_lu.ls_top_dev;
+ struct lu_target *tg = dev->ld_obd->u.obt.obt_lut;
+ int obd_num_clients = dev->ld_obd->obd_num_exports;
+ __u64 set_sz;
+ int sync = 0;
+
+ /* calculate new seq width based on number of clients */
+ set_sz = max(seq->lss_set_width,
+ obd_num_clients * seq->lss_width);
+ set_sz = min(range_space(space), set_sz);
+
+ /* Switch to hiwater range now */
+ loset = hiset;
+ /* allocate new hiwater range */
+ range_alloc(hiset, space, set_sz);
+
+ if (seq->lss_set_transno > dev->ld_obd->obd_last_committed)
+ sync = 1;
+
+ /* update ondisk seq with new *space */
+ rc = seq_store_update(env, seq, NULL, sync);
+
+ /* set new hiwater transno */
+ cfs_spin_lock(&tg->lut_translock);
+ seq->lss_set_transno = tg->lut_last_transno;
+ cfs_spin_unlock(&tg->lut_translock);
+ }
+
+ LASSERTF(!range_is_exhausted(loset) || range_is_sane(loset),
+ DRANGE"\n", PRANGE(loset));
+
+ if (rc == 0)
+ range_alloc(out, loset, seq->lss_width);
+
+ RETURN(rc);
+}
+
static int __seq_server_alloc_meta(struct lu_server_seq *seq,
- struct lu_seq_range *in,
struct lu_seq_range *out,
const struct lu_env *env)
{
struct lu_seq_range *space = &seq->lss_space;
- struct thandle *th;
int rc = 0;
ENTRY;
LASSERT(range_is_sane(space));
- /*
- * This is recovery case. Adjust super range if input range looks like
- * it is allocated from new super.
- */
- if (in != NULL) {
- CDEBUG(D_INFO, "%s: Input seq range: "
- DRANGE"\n", seq->lss_name, PRANGE(in));
-
- if (in->lsr_end <= space->lsr_start) {
- /*
- * Client is replaying a fairly old range, server
- * don't need to do any allocation.
- */
- } else if (range_is_exhausted(space)) {
- /*
- * Start is set to end of last allocated, because it
- * *is* already allocated so we take that into account
- * and do not use for other allocations.
- */
- space->lsr_start = in->lsr_end;
-
- /*
- * End is set to in->lsr_start + super sequence
- * allocation unit. That is because in->lsr_start is
- * first seq in new allocated range from controller
- * before failure.
- */
- space->lsr_end = in->lsr_start + LUSTRE_SEQ_SUPER_WIDTH;
-
- if (!seq->lss_cli) {
- CERROR("%s: No sequence controller "
- "is attached.\n", seq->lss_name);
- RETURN(-ENODEV);
- }
-
- /*
- * Let controller know that this is recovery and last
- * obtained range from it was @space.
- */
- rc = seq_client_replay_super(seq->lss_cli, space, env);
-
- if (rc) {
- CERROR("%s: Can't replay super-sequence, "
- "rc %d\n", seq->lss_name, rc);
- RETURN(rc);
- }
- } else {
- /*
- * Update super start by end from client's range. Super
- * end should not be changed if range was not exhausted.
- */
- space->lsr_start = in->lsr_end;
+ /* Check if available space ends and allocate new super seq */
+ if (range_is_exhausted(space)) {
+ if (!seq->lss_cli) {
+ CERROR("%s: No sequence controller is attached.\n",
+ seq->lss_name);
+ RETURN(-ENODEV);
}
- /* sending replay_super to update fld as only super sequence
- * server can update fld.
- * we are sending meta sequence to fld rather than super
- * sequence, but fld server can handle range merging. */
-
- in->lsr_mdt = space->lsr_mdt;
- rc = seq_client_replay_super(seq->lss_cli, in, env);
-
+ rc = seq_client_alloc_super(seq->lss_cli, env);
if (rc) {
- CERROR("%s: Can't replay super-sequence, "
- "rc %d\n", seq->lss_name, rc);
+ CERROR("%s: Can't allocate super-sequence, rc %d\n",
+ seq->lss_name, rc);
RETURN(rc);
}
- *out = *in;
-
- CDEBUG(D_INFO, "%s: Recovered space: "DRANGE"\n",
- seq->lss_name, PRANGE(space));
- } else {
- /*
- * XXX: Avoid cascading RPCs using kind of async preallocation
- * when meta-sequence is close to exhausting.
- */
- if (range_is_exhausted(space)) {
- if (!seq->lss_cli) {
- CERROR("%s: No sequence controller "
- "is attached.\n", seq->lss_name);
- RETURN(-ENODEV);
- }
-
- rc = seq_client_alloc_super(seq->lss_cli, env);
- if (rc) {
- CERROR("%s: Can't allocate super-sequence, "
- "rc %d\n", seq->lss_name, rc);
- RETURN(rc);
- }
-
- /* Saving new range to allocation space. */
- *space = seq->lss_cli->lcs_space;
- LASSERT(range_is_sane(space));
- }
-
- range_alloc(out, space, seq->lss_width);
- }
-
- th = seq_store_trans_start(seq, env, SEQ_TXN_STORE_CREDITS);
- if (IS_ERR(th))
- RETURN(PTR_ERR(th));
-
- rc = seq_store_write(seq, env, th);
- if (rc) {
- CERROR("%s: Can't write space data, rc %d\n",
- seq->lss_name, rc);
+ /* Saving new range to allocation space. */
+ *space = seq->lss_cli->lcs_space;
+ LASSERT(range_is_sane(space));
}
+ rc = range_alloc_set(env, out, seq);
if (rc == 0) {
CDEBUG(D_INFO, "%s: Allocated meta-sequence "
DRANGE"\n", seq->lss_name, PRANGE(out));
}
- seq_store_trans_stop(seq, env, th);
RETURN(rc);
}
int seq_server_alloc_meta(struct lu_server_seq *seq,
- struct lu_seq_range *in,
struct lu_seq_range *out,
const struct lu_env *env)
{
ENTRY;
cfs_down(&seq->lss_sem);
- rc = __seq_server_alloc_meta(seq, in, out, env);
+ rc = __seq_server_alloc_meta(seq, out, env);
cfs_up(&seq->lss_sem);
RETURN(rc);
static int seq_server_handle(struct lu_site *site,
const struct lu_env *env,
- __u32 opc, struct lu_seq_range *in,
- struct lu_seq_range *out)
+ __u32 opc, struct lu_seq_range *out)
{
int rc;
struct md_site *mite;
"initialized\n");
RETURN(-EINVAL);
}
- rc = seq_server_alloc_meta(mite->ms_server_seq,
- in, out, env);
+ rc = seq_server_alloc_meta(mite->ms_server_seq, out, env);
break;
case SEQ_ALLOC_SUPER:
if (!mite->ms_control_seq) {
"initialized\n");
RETURN(-EINVAL);
}
- rc = seq_server_alloc_super(mite->ms_control_seq,
- in, out, env);
+ rc = seq_server_alloc_super(mite->ms_control_seq, out, env);
break;
default:
rc = -EINVAL;
const struct lu_env *env,
struct seq_thread_info *info)
{
- struct lu_seq_range *out, *in = NULL, *tmp;
+ struct lu_seq_range *out, *tmp;
struct lu_site *site;
int rc = -EPROTO;
__u32 *opc;
ENTRY;
+ LASSERT(!(lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY));
site = req->rq_export->exp_obd->obd_lu_dev->ld_site;
LASSERT(site != NULL);
tmp = req_capsule_client_get(info->sti_pill, &RMF_SEQ_RANGE);
- if (lustre_msg_get_flags(req->rq_reqmsg) & MSG_REPLAY) {
- in = tmp;
-
- if (range_is_zero(in) || !range_is_sane(in)) {
- CERROR("Replayed seq range is invalid: "
- DRANGE"\n", PRANGE(in));
- RETURN(err_serious(-EINVAL));
- }
- }
/* seq client passed mdt id, we need to pass that using out
* range parameter */
out->lsr_mdt = tmp->lsr_mdt;
- rc = seq_server_handle(site, env, *opc, in, out);
+ rc = seq_server_handle(site, env, *opc, out);
} else
rc = err_serious(-EPROTO);
seq_thread_info_init(req, info);
rc = seq_req_handle(req, env, info);
+ /* XXX: we don't need replay but MDT assign transno in any case,
+ * remove it manually before reply*/
+ lustre_msg_set_transno(req->rq_repmsg, 0);
seq_thread_info_fini(info);
return rc;
}
#endif
+
int seq_server_init(struct lu_server_seq *seq,
struct dt_device *dev,
const char *prefix,
struct md_site *ms,
const struct lu_env *env)
{
- struct thandle *th;
int rc, is_srv = (type == LUSTRE_SEQ_SERVER);
ENTRY;
- LASSERT(dev != NULL);
+ LASSERT(dev != NULL);
LASSERT(prefix != NULL);
seq->lss_cli = NULL;
seq->lss_type = type;
seq->lss_site = ms;
range_init(&seq->lss_space);
+
+ range_init(&seq->lss_lowater_set);
+ range_init(&seq->lss_hiwater_set);
+ seq->lss_set_width = LUSTRE_SEQ_BATCH_WIDTH;
+
cfs_sema_init(&seq->lss_sem, 1);
seq->lss_width = is_srv ?
"on store. Initialize space\n",
seq->lss_name);
- th = seq_store_trans_start(seq, env, SEQ_TXN_STORE_CREDITS);
- if (IS_ERR(th))
- RETURN(PTR_ERR(th));
-
- /* Save default controller value to store. */
- rc = seq_store_write(seq, env, th);
+ rc = seq_store_update(env, seq, NULL, 0);
if (rc) {
CERROR("%s: Can't write space data, "
"rc %d\n", seq->lss_name, rc);
}
- seq_store_trans_stop(seq, env, th);
} else if (rc) {
- CERROR("%s: Can't read space data, rc %d\n",
- seq->lss_name, rc);
- GOTO(out, rc);
- }
+ CERROR("%s: Can't read space data, rc %d\n",
+ seq->lss_name, rc);
+ GOTO(out, rc);
+ }
if (is_srv) {
LASSERT(range_is_sane(&seq->lss_space));
rc = seq_server_proc_init(seq);
if (rc)
- GOTO(out, rc);
+ GOTO(out, rc);
- EXIT;
+ EXIT;
out:
- if (rc)
- seq_server_fini(seq, env);
- return rc;
+ if (rc)
+ seq_server_fini(seq, env);
+ return rc;
}
EXPORT_SYMBOL(seq_server_init);
git://git.whamcloud.com / fs / lustre-release.git / commitdiff