*
* 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) 2008, 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/
static struct kmem_cache *lu_ref_link_kmem;
static struct lu_kmem_descr lu_ref_caches[] = {
- {
- .ckd_cache = &lu_ref_link_kmem,
- .ckd_name = "lu_ref_link_kmem",
- .ckd_size = sizeof (struct lu_ref_link)
- },
- {
- .ckd_cache = NULL
- }
+ {
+ .ckd_cache = &lu_ref_link_kmem,
+ .ckd_name = "lu_ref_link_kmem",
+ .ckd_size = sizeof(struct lu_ref_link)
+ },
+ {
+ .ckd_cache = NULL
+ }
};
/**
*
* Protected by lu_ref_refs_guard.
*/
-static struct list_head lu_ref_refs;
-static spinlock_t lu_ref_refs_guard;
+static LIST_HEAD(lu_ref_refs);
+static DEFINE_SPINLOCK(lu_ref_refs_guard);
static struct lu_ref lu_ref_marker = {
.lf_guard = __SPIN_LOCK_UNLOCKED(lu_ref_marker.lf_guard),
.lf_list = LIST_HEAD_INIT(lu_ref_marker.lf_list),
void lu_ref_print(const struct lu_ref *ref)
{
- struct lu_ref_link *link;
+ struct lu_ref_link *link;
- CERROR("lu_ref: %p %d %d %s:%d\n",
- ref, ref->lf_refs, ref->lf_failed, ref->lf_func, ref->lf_line);
+ CERROR("lu_ref: %p %d %d %s:%d\n",
+ ref, ref->lf_refs, ref->lf_failed, ref->lf_func, ref->lf_line);
list_for_each_entry(link, &ref->lf_list, ll_linkage) {
- CERROR(" link: %s %p\n", link->ll_scope, link->ll_source);
- }
+ CERROR(" link: %s %p\n", link->ll_scope, link->ll_source);
+ }
}
-EXPORT_SYMBOL(lu_ref_print);
static int lu_ref_is_marker(const struct lu_ref *ref)
{
- return (ref == &lu_ref_marker);
+ return ref == &lu_ref_marker;
}
void lu_ref_print_all(void)
}
spin_unlock(&lu_ref_refs_guard);
}
-EXPORT_SYMBOL(lu_ref_print_all);
void lu_ref_init_loc(struct lu_ref *ref, const char *func, const int line)
{
void lu_ref_fini(struct lu_ref *ref)
{
+ spin_lock(&ref->lf_guard);
REFASSERT(ref, list_empty(&ref->lf_list));
REFASSERT(ref, ref->lf_refs == 0);
+ spin_unlock(&ref->lf_guard);
spin_lock(&lu_ref_refs_guard);
list_del_init(&ref->lf_linkage);
spin_unlock(&lu_ref_refs_guard);
EXPORT_SYMBOL(lu_ref_fini);
static struct lu_ref_link *lu_ref_add_context(struct lu_ref *ref,
- int flags,
- const char *scope,
- const void *source)
+ int flags,
+ const char *scope,
+ const void *source)
{
- struct lu_ref_link *link;
-
- link = NULL;
- if (lu_ref_link_kmem != NULL) {
- OBD_SLAB_ALLOC_PTR_GFP(link, lu_ref_link_kmem, flags);
- if (link != NULL) {
- link->ll_ref = ref;
- link->ll_scope = scope;
- link->ll_source = source;
+ struct lu_ref_link *link;
+
+ link = NULL;
+ if (lu_ref_link_kmem != NULL) {
+ OBD_SLAB_ALLOC_PTR_GFP(link, lu_ref_link_kmem, flags);
+ if (link != NULL) {
+ link->ll_ref = ref;
+ link->ll_scope = scope;
+ link->ll_source = source;
spin_lock(&ref->lf_guard);
list_add_tail(&link->ll_linkage, &ref->lf_list);
ref->lf_refs++;
void lu_ref_add(struct lu_ref *ref, const char *scope, const void *source)
{
might_sleep();
- lu_ref_add_context(ref, GFP_IOFS, scope, source);
+ lu_ref_add_context(ref, GFP_NOFS, scope, source);
}
EXPORT_SYMBOL(lu_ref_add);
EXPORT_SYMBOL(lu_ref_add_atomic);
static inline int lu_ref_link_eq(const struct lu_ref_link *link,
- const char *scope, const void *source)
+ const char *scope,
+ const void *source)
{
- return link->ll_source == source && !strcmp(link->ll_scope, scope);
+ return link->ll_source == source && !strcmp(link->ll_scope, scope);
}
/**
static struct lu_ref_link *lu_ref_find(struct lu_ref *ref, const char *scope,
const void *source)
{
- struct lu_ref_link *link;
- unsigned iterations;
+ struct lu_ref_link *link;
+ unsigned int iterations;
- iterations = 0;
+ iterations = 0;
list_for_each_entry(link, &ref->lf_list, ll_linkage) {
- ++iterations;
- if (lu_ref_link_eq(link, scope, source)) {
- if (iterations > lu_ref_chain_max_length) {
- CWARN("Long lu_ref chain %d \"%s\":%p\n",
- iterations, scope, source);
- lu_ref_chain_max_length = iterations * 3 / 2;
- }
- return link;
- }
- }
- return NULL;
+ ++iterations;
+ if (lu_ref_link_eq(link, scope, source)) {
+ if (iterations > lu_ref_chain_max_length) {
+ CWARN("Long lu_ref chain %d \"%s\":%p\n",
+ iterations, scope, source);
+ lu_ref_chain_max_length = iterations * 3 / 2;
+ }
+ return link;
+ }
+ }
+ return NULL;
}
void lu_ref_del(struct lu_ref *ref, const char *scope, const void *source)
const char *scope,
const void *source0, const void *source1)
{
- REFASSERT(ref, link != NULL && !IS_ERR(link));
-
spin_lock(&ref->lf_guard);
+ REFASSERT(ref, link != NULL && !IS_ERR(link));
REFASSERT(ref, link->ll_ref == ref);
REFASSERT(ref, lu_ref_link_eq(link, scope, source0));
link->ll_source = source1;
void lu_ref_del_at(struct lu_ref *ref, struct lu_ref_link *link,
const char *scope, const void *source)
{
- REFASSERT(ref, link != NULL && !IS_ERR(link));
spin_lock(&ref->lf_guard);
+ REFASSERT(ref, link != NULL && !IS_ERR(link));
REFASSERT(ref, link->ll_ref == ref);
REFASSERT(ref, lu_ref_link_eq(link, scope, source));
list_del(&link->ll_linkage);
}
EXPORT_SYMBOL(lu_ref_del_at);
-#ifdef LPROCFS
+#ifdef CONFIG_PROC_FS
static void *lu_ref_seq_start(struct seq_file *seq, loff_t *pos)
{
static void *lu_ref_seq_next(struct seq_file *seq, void *p, loff_t *pos)
{
- struct lu_ref *ref = p;
- struct lu_ref *next;
+ struct lu_ref *ref = p;
+ struct lu_ref *next;
- LASSERT(seq->private == p);
+ LASSERT(seq->private == p);
LASSERT(!list_empty(&ref->lf_linkage));
spin_lock(&lu_ref_refs_guard);
static void lu_ref_seq_stop(struct seq_file *seq, void *p)
{
- /* Nothing to do */
+ /* Nothing to do */
}
/* print the entry */
spin_lock(&next->lf_guard);
- seq_printf(seq, "lu_ref: %p %d %d %s:%d\n",
- next, next->lf_refs, next->lf_failed,
- next->lf_func, next->lf_line);
- if (next->lf_refs > 64) {
- seq_printf(seq, " too many references, skip\n");
- } else {
- struct lu_ref_link *link;
- int i = 0;
+ seq_printf(seq, "lu_ref: %p %d %d %s:%d\n",
+ next, next->lf_refs, next->lf_failed,
+ next->lf_func, next->lf_line);
+ if (next->lf_refs > 64) {
+ seq_puts(seq, " too many references, skip\n");
+ } else {
+ struct lu_ref_link *link;
+ int i = 0;
list_for_each_entry(link, &next->lf_list, ll_linkage)
- seq_printf(seq, " #%d link: %s %p\n",
- i++, link->ll_scope, link->ll_source);
- }
+ seq_printf(seq, " #%d link: %s %p\n",
+ i++, link->ll_scope, link->ll_source);
+ }
spin_unlock(&next->lf_guard);
spin_unlock(&lu_ref_refs_guard);
}
static struct seq_operations lu_ref_seq_ops = {
- .start = lu_ref_seq_start,
- .stop = lu_ref_seq_stop,
- .next = lu_ref_seq_next,
- .show = lu_ref_seq_show
+ .start = lu_ref_seq_start,
+ .stop = lu_ref_seq_stop,
+ .next = lu_ref_seq_next,
+ .show = lu_ref_seq_show
};
static int lu_ref_seq_open(struct inode *inode, struct file *file)
list_add(&marker->lf_linkage, &lu_ref_refs);
spin_unlock(&lu_ref_refs_guard);
- if (result == 0) {
- struct seq_file *f = file->private_data;
- f->private = marker;
- } else {
- seq_release(inode, file);
- }
- }
+ if (result == 0) {
+ struct seq_file *f = file->private_data;
+
+ f->private = marker;
+ } else {
+ seq_release(inode, file);
+ }
+ }
- return result;
+ return result;
}
static int lu_ref_seq_release(struct inode *inode, struct file *file)
{
- struct lu_ref *ref = ((struct seq_file *)file->private_data)->private;
+ struct seq_file *m = file->private_data;
+ struct lu_ref *ref = m->private;
spin_lock(&lu_ref_refs_guard);
list_del_init(&ref->lf_linkage);
}
static struct file_operations lu_ref_dump_fops = {
- .owner = THIS_MODULE,
- .open = lu_ref_seq_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = lu_ref_seq_release
+ .owner = THIS_MODULE,
+ .open = lu_ref_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = lu_ref_seq_release
};
-#endif /* LPROCFS */
+#endif /* CONFIG_PROC_FS */
int lu_ref_global_init(void)
{
CDEBUG(D_CONSOLE,
"lu_ref tracking is enabled. Performance isn't.\n");
- INIT_LIST_HEAD(&lu_ref_refs);
- spin_lock_init(&lu_ref_refs_guard);
- result = lu_kmem_init(lu_ref_caches);
+ result = lu_kmem_init(lu_ref_caches);
-#ifdef LPROCFS
- if (result == 0) {
- result = lprocfs_seq_create(proc_lustre_root, "lu_refs",
- 0444, &lu_ref_dump_fops, NULL);
- if (result)
- lu_kmem_fini(lu_ref_caches);
- }
-#endif /* LPROCFS */
+#ifdef CONFIG_PROC_FS
+ if (result == 0) {
+ result = lprocfs_seq_create(proc_lustre_root, "lu_refs",
+ 0444, &lu_ref_dump_fops, NULL);
+ if (result)
+ lu_kmem_fini(lu_ref_caches);
+ }
+#endif /* CONFIG_PROC_FS */
- return result;
+ return result;
}
void lu_ref_global_fini(void)
{
-#ifdef LPROCFS
- lprocfs_remove_proc_entry("lu_refs", proc_lustre_root);
-#endif /* LPROCFS */
- lu_kmem_fini(lu_ref_caches);
+#ifdef CONFIG_PROC_FS
+ lprocfs_remove_proc_entry("lu_refs", proc_lustre_root);
+#endif /* CONFIG_PROC_FS */
+ lu_kmem_fini(lu_ref_caches);
}
#endif /* USE_LU_REF */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff