-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Whamcloud, Inc.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
int rc;
ENTRY;
- cfs_down(&seq->lcs_sem);
+ cfs_mutex_lock(&seq->lcs_mutex);
#ifdef __KERNEL__
if (seq->lcs_srv) {
#ifdef __KERNEL__
}
#endif
- cfs_up(&seq->lcs_sem);
+ cfs_mutex_unlock(&seq->lcs_mutex);
RETURN(rc);
}
/* Request sequence-controller node to allocate new meta-sequence. */
-static int seq_client_alloc_meta(struct lu_client_seq *seq,
- const struct lu_env *env)
+static int seq_client_alloc_meta(const struct lu_env *env,
+ struct lu_client_seq *seq)
{
int rc;
ENTRY;
}
/* Allocate new sequence for client. */
-static int seq_client_alloc_seq(struct lu_client_seq *seq, seqno_t *seqnr)
+static int seq_client_alloc_seq(const struct lu_env *env,
+ struct lu_client_seq *seq, seqno_t *seqnr)
{
int rc;
ENTRY;
LASSERT(range_is_sane(&seq->lcs_space));
if (range_is_exhausted(&seq->lcs_space)) {
- rc = seq_client_alloc_meta(seq, NULL);
+ rc = seq_client_alloc_meta(env, seq);
if (rc) {
- CERROR("%s: Can't allocate new meta-sequence, "
+ CERROR("%s: Can't allocate new meta-sequence,"
"rc %d\n", seq->lcs_name, rc);
RETURN(rc);
} else {
if (seq->lcs_update) {
cfs_waitq_add(&seq->lcs_waitq, link);
cfs_set_current_state(CFS_TASK_UNINT);
- cfs_up(&seq->lcs_sem);
+ cfs_mutex_unlock(&seq->lcs_mutex);
cfs_waitq_wait(link, CFS_TASK_UNINT);
- cfs_down(&seq->lcs_sem);
+ cfs_mutex_lock(&seq->lcs_mutex);
cfs_waitq_del(&seq->lcs_waitq, link);
cfs_set_current_state(CFS_TASK_RUNNING);
return -EAGAIN;
}
++seq->lcs_update;
- cfs_up(&seq->lcs_sem);
+ cfs_mutex_unlock(&seq->lcs_mutex);
return 0;
}
static void seq_fid_alloc_fini(struct lu_client_seq *seq)
{
LASSERT(seq->lcs_update == 1);
- cfs_down(&seq->lcs_sem);
+ cfs_mutex_lock(&seq->lcs_mutex);
--seq->lcs_update;
cfs_waitq_signal(&seq->lcs_waitq);
}
+/* Allocate the whole seq to the caller*/
+int seq_client_get_seq(const struct lu_env *env,
+ struct lu_client_seq *seq, seqno_t *seqnr)
+{
+ cfs_waitlink_t link;
+ int rc;
+
+ LASSERT(seqnr != NULL);
+ cfs_mutex_lock(&seq->lcs_mutex);
+ cfs_waitlink_init(&link);
+
+ while (1) {
+ rc = seq_fid_alloc_prep(seq, &link);
+ if (rc == 0)
+ break;
+ }
+
+ rc = seq_client_alloc_seq(env, seq, seqnr);
+ if (rc) {
+ CERROR("%s: Can't allocate new sequence, "
+ "rc %d\n", seq->lcs_name, rc);
+ seq_fid_alloc_fini(seq);
+ cfs_mutex_unlock(&seq->lcs_mutex);
+ return rc;
+ }
+
+ CDEBUG(D_INFO, "%s: allocate sequence "
+ "[0x%16.16"LPF64"x]\n", seq->lcs_name, *seqnr);
+
+ /*Since the caller require the whole seq,
+ *so marked this seq to be used*/
+ seq->lcs_fid.f_oid = LUSTRE_SEQ_MAX_WIDTH;
+ seq->lcs_fid.f_seq = *seqnr;
+ seq->lcs_fid.f_ver = 0;
+
+ /*
+ * Inform caller that sequence switch is performed to allow it
+ * to setup FLD for it.
+ */
+ seq_fid_alloc_fini(seq);
+ cfs_mutex_unlock(&seq->lcs_mutex);
+
+ return rc;
+}
+EXPORT_SYMBOL(seq_client_get_seq);
+
/* Allocate new fid on passed client @seq and save it to @fid. */
-int seq_client_alloc_fid(struct lu_client_seq *seq, struct lu_fid *fid)
+int seq_client_alloc_fid(const struct lu_env *env,
+ struct lu_client_seq *seq, struct lu_fid *fid)
{
cfs_waitlink_t link;
int rc;
LASSERT(fid != NULL);
cfs_waitlink_init(&link);
- cfs_down(&seq->lcs_sem);
+ cfs_mutex_lock(&seq->lcs_mutex);
while (1) {
seqno_t seqnr;
if (rc)
continue;
- rc = seq_client_alloc_seq(seq, &seqnr);
+ rc = seq_client_alloc_seq(env, seq, &seqnr);
if (rc) {
CERROR("%s: Can't allocate new sequence, "
"rc %d\n", seq->lcs_name, rc);
seq_fid_alloc_fini(seq);
- cfs_up(&seq->lcs_sem);
+ cfs_mutex_unlock(&seq->lcs_mutex);
RETURN(rc);
}
}
*fid = seq->lcs_fid;
- cfs_up(&seq->lcs_sem);
+ cfs_mutex_unlock(&seq->lcs_mutex);
CDEBUG(D_INFO, "%s: Allocated FID "DFID"\n", seq->lcs_name, PFID(fid));
RETURN(rc);
*/
void seq_client_flush(struct lu_client_seq *seq)
{
+ cfs_waitlink_t link;
+
LASSERT(seq != NULL);
- cfs_down(&seq->lcs_sem);
+ cfs_waitlink_init(&link);
+ cfs_mutex_lock(&seq->lcs_mutex);
+
+ while (seq->lcs_update) {
+ cfs_waitq_add(&seq->lcs_waitq, &link);
+ cfs_set_current_state(CFS_TASK_UNINT);
+ cfs_mutex_unlock(&seq->lcs_mutex);
+
+ cfs_waitq_wait(&link, CFS_TASK_UNINT);
+
+ cfs_mutex_lock(&seq->lcs_mutex);
+ cfs_waitq_del(&seq->lcs_waitq, &link);
+ cfs_set_current_state(CFS_TASK_RUNNING);
+ }
+
fid_zero(&seq->lcs_fid);
/**
* this id shld not be used for seq range allocation.
seq->lcs_space.lsr_index = -1;
range_init(&seq->lcs_space);
- cfs_up(&seq->lcs_sem);
+ cfs_mutex_unlock(&seq->lcs_mutex);
}
EXPORT_SYMBOL(seq_client_flush);
seq->lcs_exp = exp;
seq->lcs_srv = srv;
seq->lcs_type = type;
- cfs_sema_init(&seq->lcs_sem, 1);
+ cfs_mutex_init(&seq->lcs_mutex);
seq->lcs_width = LUSTRE_SEQ_MAX_WIDTH;
cfs_waitq_init(&seq->lcs_waitq);