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Date: Tue, 23 Jul 2013 00:06:42 +0800
From: Peng Tao <bergwolf@...il.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org,
"John L. Hammond" <john.hammond@...el.com>,
Peng Tao <tao.peng@....com>,
Andreas Dilger <andreas.dilger@...el.com>
Subject: [PATCH 21/48] staging/lustre/obdclass: use a dummy structure for lu_ref_link
From: "John L. Hammond" <john.hammond@...el.com>
Move the definition of struct lu_ref_link to lu_ref.h. If USE_LU_REF
is not defined then define it to be the empty struct. Change the
return type of lu_ref_add() and lu_ref_add_atomic() to void. Add
lu_ref_add_at() taking same arguments as lu_ref_add() togerther with a
pointer to a struct lu_ref_link and returning void. Adjust all
structures containing a lu_ref_link pointer to contain a struct
lu_ref_link instead. Use lu_ref_add_at() and lu_ref_del_at() to
handle embedded lu_ref_links.
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3059
Lustre-change: http://review.whamcloud.com/5920
Signed-off-by: John L. Hammond <john.hammond@...el.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@...el.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@...el.com>
Reviewed-by: Mike Pershin <mike.pershin@...el.com>
Reviewed-by: Oleg Drokin <oleg.drokin@...el.com>
Signed-off-by: Peng Tao <tao.peng@....com>
Signed-off-by: Andreas Dilger <andreas.dilger@...el.com>
---
drivers/staging/lustre/lustre/include/cl_object.h | 10 +--
drivers/staging/lustre/lustre/include/lu_object.h | 18 +++--
drivers/staging/lustre/lustre/include/lu_ref.h | 77 ++++++++++++--------
drivers/staging/lustre/lustre/obdclass/cl_io.c | 17 +++--
drivers/staging/lustre/lustre/obdclass/cl_lock.c | 6 +-
drivers/staging/lustre/lustre/obdclass/cl_page.c | 5 +-
drivers/staging/lustre/lustre/obdclass/lu_object.c | 15 ++--
drivers/staging/lustre/lustre/obdclass/lu_ref.c | 74 +++++++++----------
drivers/staging/lustre/lustre/osc/osc_cache.c | 8 +-
9 files changed, 130 insertions(+), 100 deletions(-)
diff --git a/drivers/staging/lustre/lustre/include/cl_object.h b/drivers/staging/lustre/lustre/include/cl_object.h
index 4bb6880..4a47850 100644
--- a/drivers/staging/lustre/lustre/include/cl_object.h
+++ b/drivers/staging/lustre/lustre/include/cl_object.h
@@ -768,11 +768,11 @@ struct cl_page {
/** List of references to this page, for debugging. */
struct lu_ref cp_reference;
/** Link to an object, for debugging. */
- struct lu_ref_link *cp_obj_ref;
+ struct lu_ref_link cp_obj_ref;
/** Link to a queue, for debugging. */
- struct lu_ref_link *cp_queue_ref;
+ struct lu_ref_link cp_queue_ref;
/** Per-page flags from enum cl_page_flags. Protected by a VM lock. */
- unsigned cp_flags;
+ unsigned cp_flags;
/** Assigned if doing a sync_io */
struct cl_sync_io *cp_sync_io;
};
@@ -1625,7 +1625,7 @@ struct cl_lock {
/**
* A reference for cl_lock::cll_descr::cld_obj. For debugging.
*/
- struct lu_ref_link *cll_obj_ref;
+ struct lu_ref_link cll_obj_ref;
#ifdef CONFIG_LOCKDEP
/* "dep_map" name is assumed by lockdep.h macros. */
struct lockdep_map dep_map;
@@ -2517,7 +2517,7 @@ struct cl_req_obj {
/** object itself */
struct cl_object *ro_obj;
/** reference to cl_req_obj::ro_obj. For debugging. */
- struct lu_ref_link *ro_obj_ref;
+ struct lu_ref_link ro_obj_ref;
/* something else? Number of pages for a given object? */
};
diff --git a/drivers/staging/lustre/lustre/include/lu_object.h b/drivers/staging/lustre/lustre/include/lu_object.h
index d40ad81..f0d6fb1 100644
--- a/drivers/staging/lustre/lustre/include/lu_object.h
+++ b/drivers/staging/lustre/lustre/include/lu_object.h
@@ -496,7 +496,7 @@ struct lu_object {
/**
* Link to the device, for debugging.
*/
- struct lu_ref_link *lo_dev_ref;
+ struct lu_ref_link lo_dev_ref;
};
enum lu_object_header_flags {
@@ -868,11 +868,19 @@ static inline __u32 lu_object_attr(const struct lu_object *o)
return o->lo_header->loh_attr;
}
-static inline struct lu_ref_link *lu_object_ref_add(struct lu_object *o,
- const char *scope,
- const void *source)
+static inline void lu_object_ref_add(struct lu_object *o,
+ const char *scope,
+ const void *source)
{
- return lu_ref_add(&o->lo_header->loh_reference, scope, source);
+ lu_ref_add(&o->lo_header->loh_reference, scope, source);
+}
+
+static inline void lu_object_ref_add_at(struct lu_object *o,
+ struct lu_ref_link *link,
+ const char *scope,
+ const void *source)
+{
+ lu_ref_add_at(&o->lo_header->loh_reference, link, scope, source);
}
static inline void lu_object_ref_del(struct lu_object *o,
diff --git a/drivers/staging/lustre/lustre/include/lu_ref.h b/drivers/staging/lustre/lustre/include/lu_ref.h
index adfbf51..3b0b483 100644
--- a/drivers/staging/lustre/lustre/include/lu_ref.h
+++ b/drivers/staging/lustre/lustre/include/lu_ref.h
@@ -109,9 +109,6 @@
#ifdef CONFIG_LUSTRE_DEBUG_LU_REF_CHECK
-/* An incomplete type (defined locally in lu_ref.c) */
-struct lu_ref_link;
-
/**
* Data-structure to keep track of references to a given object. This is used
* for debugging.
@@ -153,31 +150,48 @@ struct lu_ref {
struct list_head lf_linkage;
};
-int lu_ref_global_init(void);
-void lu_ref_global_fini(void);
+struct lu_ref_link {
+ struct lu_ref *ll_ref;
+ struct list_head ll_linkage;
+ const char *ll_scope;
+ const void *ll_source;
+};
+
void lu_ref_init_loc(struct lu_ref *ref, const char *func, const int line);
void lu_ref_fini (struct lu_ref *ref);
#define lu_ref_init(ref) lu_ref_init_loc(ref, __FUNCTION__, __LINE__)
-struct lu_ref_link *lu_ref_add (struct lu_ref *ref, const char *scope,
- const void *source);
-struct lu_ref_link *lu_ref_add_atomic(struct lu_ref *ref, const char *scope,
- const void *source);
-void lu_ref_del (struct lu_ref *ref, const char *scope,
- const void *source);
-void lu_ref_set_at (struct lu_ref *ref,
- struct lu_ref_link *link,
- const char *scope, const void *source0,
- const void *source1);
-void lu_ref_del_at (struct lu_ref *ref,
- struct lu_ref_link *link,
- const char *scope, const void *source);
-void lu_ref_print (const struct lu_ref *ref);
-void lu_ref_print_all (void);
+void lu_ref_add(struct lu_ref *ref, const char *scope, const void *source);
+
+void lu_ref_add_atomic(struct lu_ref *ref, const char *scope,
+ const void *source);
+
+void lu_ref_add_at(struct lu_ref *ref, struct lu_ref_link *link,
+ const char *scope, const void *source);
+
+void lu_ref_del(struct lu_ref *ref, const char *scope, const void *source);
+
+void lu_ref_set_at(struct lu_ref *ref, struct lu_ref_link *link,
+ const char *scope, const void *source0, const void *source1);
+
+void lu_ref_del_at(struct lu_ref *ref, struct lu_ref_link *link,
+ const char *scope, const void *source);
+
+void lu_ref_print(const struct lu_ref *ref);
+
+void lu_ref_print_all(void);
+
+int lu_ref_global_init(void);
+
+void lu_ref_global_fini(void);
#else /* !CONFIG_LUSTRE_DEBUG_LU_REF_CHECK */
-struct lu_ref {};
+struct lu_ref {
+};
+
+struct lu_ref_link {
+};
static inline void lu_ref_init(struct lu_ref *ref)
{
@@ -187,18 +201,23 @@ static inline void lu_ref_fini(struct lu_ref *ref)
{
}
-static inline struct lu_ref_link *lu_ref_add(struct lu_ref *ref,
- const char *scope,
- const void *source)
+static inline void lu_ref_add(struct lu_ref *ref,
+ const char *scope,
+ const void *source)
+{
+}
+
+static inline void lu_ref_add_atomic(struct lu_ref *ref,
+ const char *scope,
+ const void *source)
{
- return NULL;
}
-static inline struct lu_ref_link *lu_ref_add_atomic(struct lu_ref *ref,
- const char *scope,
- const void *source)
+static inline void lu_ref_add_at(struct lu_ref *ref,
+ struct lu_ref_link *link,
+ const char *scope,
+ const void *source)
{
- return NULL;
}
static inline void lu_ref_del(struct lu_ref *ref, const char *scope,
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_io.c b/drivers/staging/lustre/lustre/obdclass/cl_io.c
index 75c9be8..f3f0315 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_io.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_io.c
@@ -1105,7 +1105,7 @@ void cl_page_list_add(struct cl_page_list *plist, struct cl_page *page)
LASSERT(list_empty(&page->cp_batch));
list_add_tail(&page->cp_batch, &plist->pl_pages);
++plist->pl_nr;
- page->cp_queue_ref = lu_ref_add(&page->cp_reference, "queue", plist);
+ lu_ref_add_at(&page->cp_reference, &page->cp_queue_ref, "queue", plist);
cl_page_get(page);
EXIT;
}
@@ -1126,7 +1126,7 @@ void cl_page_list_del(const struct lu_env *env,
mutex_unlock(&page->cp_mutex);
lockdep_on();
--plist->pl_nr;
- lu_ref_del_at(&page->cp_reference, page->cp_queue_ref, "queue", plist);
+ lu_ref_del_at(&page->cp_reference, &page->cp_queue_ref, "queue", plist);
cl_page_put(env, page);
EXIT;
}
@@ -1146,8 +1146,8 @@ void cl_page_list_move(struct cl_page_list *dst, struct cl_page_list *src,
list_move_tail(&page->cp_batch, &dst->pl_pages);
--src->pl_nr;
++dst->pl_nr;
- lu_ref_set_at(&page->cp_reference,
- page->cp_queue_ref, "queue", src, dst);
+ lu_ref_set_at(&page->cp_reference, &page->cp_queue_ref, "queue",
+ src, dst);
EXIT;
}
EXPORT_SYMBOL(cl_page_list_move);
@@ -1202,7 +1202,8 @@ void cl_page_list_disown(const struct lu_env *env,
* XXX cl_page_disown0() will fail if page is not locked.
*/
cl_page_disown0(env, io, page);
- lu_ref_del(&page->cp_reference, "queue", plist);
+ lu_ref_del_at(&page->cp_reference, &page->cp_queue_ref, "queue",
+ plist);
cl_page_put(env, page);
}
EXIT;
@@ -1449,7 +1450,7 @@ static void cl_req_free(const struct lu_env *env, struct cl_req *req)
struct cl_object *obj = req->crq_o[i].ro_obj;
if (obj != NULL) {
lu_object_ref_del_at(&obj->co_lu,
- req->crq_o[i].ro_obj_ref,
+ &req->crq_o[i].ro_obj_ref,
"cl_req", req);
cl_object_put(env, obj);
}
@@ -1570,8 +1571,8 @@ void cl_req_page_add(const struct lu_env *env,
if (rqo->ro_obj == NULL) {
rqo->ro_obj = obj;
cl_object_get(obj);
- rqo->ro_obj_ref = lu_object_ref_add(&obj->co_lu,
- "cl_req", req);
+ lu_object_ref_add_at(&obj->co_lu, &rqo->ro_obj_ref,
+ "cl_req", req);
break;
}
}
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_lock.c b/drivers/staging/lustre/lustre/obdclass/cl_lock.c
index d34e044..958c1e5 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_lock.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_lock.c
@@ -267,7 +267,7 @@ static void cl_lock_free(const struct lu_env *env, struct cl_lock *lock)
}
CS_LOCK_DEC(obj, total);
CS_LOCKSTATE_DEC(obj, lock->cll_state);
- lu_object_ref_del_at(&obj->co_lu, lock->cll_obj_ref, "cl_lock", lock);
+ lu_object_ref_del_at(&obj->co_lu, &lock->cll_obj_ref, "cl_lock", lock);
cl_object_put(env, obj);
lu_ref_fini(&lock->cll_reference);
lu_ref_fini(&lock->cll_holders);
@@ -373,8 +373,8 @@ static struct cl_lock *cl_lock_alloc(const struct lu_env *env,
lock->cll_descr = *descr;
lock->cll_state = CLS_NEW;
cl_object_get(obj);
- lock->cll_obj_ref = lu_object_ref_add(&obj->co_lu,
- "cl_lock", lock);
+ lu_object_ref_add_at(&obj->co_lu, &lock->cll_obj_ref, "cl_lock",
+ lock);
INIT_LIST_HEAD(&lock->cll_layers);
INIT_LIST_HEAD(&lock->cll_linkage);
INIT_LIST_HEAD(&lock->cll_inclosure);
diff --git a/drivers/staging/lustre/lustre/obdclass/cl_page.c b/drivers/staging/lustre/lustre/obdclass/cl_page.c
index bb93359..d9ca5d5 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_page.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_page.c
@@ -270,7 +270,7 @@ static void cl_page_free(const struct lu_env *env, struct cl_page *page)
}
CS_PAGE_DEC(obj, total);
CS_PAGESTATE_DEC(obj, page->cp_state);
- lu_object_ref_del_at(&obj->co_lu, page->cp_obj_ref, "cl_page", page);
+ lu_object_ref_del_at(&obj->co_lu, &page->cp_obj_ref, "cl_page", page);
cl_object_put(env, obj);
lu_ref_fini(&page->cp_reference);
OBD_FREE(page, pagesize);
@@ -305,7 +305,8 @@ static struct cl_page *cl_page_alloc(const struct lu_env *env,
atomic_inc(&page->cp_ref);
page->cp_obj = o;
cl_object_get(o);
- page->cp_obj_ref = lu_object_ref_add(&o->co_lu, "cl_page",page);
+ lu_object_ref_add_at(&o->co_lu, &page->cp_obj_ref, "cl_page",
+ page);
page->cp_index = ind;
cl_page_state_set_trust(page, CPS_CACHED);
page->cp_type = type;
diff --git a/drivers/staging/lustre/lustre/obdclass/lu_object.c b/drivers/staging/lustre/lustre/obdclass/lu_object.c
index 5559732..2fb65f6 100644
--- a/drivers/staging/lustre/lustre/obdclass/lu_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/lu_object.c
@@ -1147,15 +1147,16 @@ EXPORT_SYMBOL(lu_device_fini);
* Initialize object \a o that is part of compound object \a h and was created
* by device \a d.
*/
-int lu_object_init(struct lu_object *o,
- struct lu_object_header *h, struct lu_device *d)
+int lu_object_init(struct lu_object *o, struct lu_object_header *h,
+ struct lu_device *d)
{
- memset(o, 0, sizeof *o);
+ memset(o, 0, sizeof(*o));
o->lo_header = h;
- o->lo_dev = d;
+ o->lo_dev = d;
lu_device_get(d);
- o->lo_dev_ref = lu_ref_add(&d->ld_reference, "lu_object", o);
+ lu_ref_add_at(&d->ld_reference, &o->lo_dev_ref, "lu_object", o);
INIT_LIST_HEAD(&o->lo_linkage);
+
return 0;
}
EXPORT_SYMBOL(lu_object_init);
@@ -1170,8 +1171,8 @@ void lu_object_fini(struct lu_object *o)
LASSERT(list_empty(&o->lo_linkage));
if (dev != NULL) {
- lu_ref_del_at(&dev->ld_reference,
- o->lo_dev_ref , "lu_object", o);
+ lu_ref_del_at(&dev->ld_reference, &o->lo_dev_ref,
+ "lu_object", o);
lu_device_put(dev);
o->lo_dev = NULL;
}
diff --git a/drivers/staging/lustre/lustre/obdclass/lu_ref.c b/drivers/staging/lustre/lustre/obdclass/lu_ref.c
index 79d25c5..b5f1bda 100644
--- a/drivers/staging/lustre/lustre/obdclass/lu_ref.c
+++ b/drivers/staging/lustre/lustre/obdclass/lu_ref.c
@@ -43,7 +43,7 @@
#define DEBUG_SUBSYSTEM S_CLASS
#include <linux/gfp.h>
-#include <linux/libcfs.h>
+#include <linux/libcfs/libcfs.h>
#include <obd.h>
#include <obd_class.h>
#include <obd_support.h>
@@ -65,13 +65,6 @@
} \
} while (0)
-struct lu_ref_link {
- struct lu_ref *ll_ref;
- struct list_head ll_linkage;
- const char *ll_scope;
- const void *ll_source;
-};
-
static struct kmem_cache *lu_ref_link_kmem;
static struct lu_kmem_descr lu_ref_caches[] = {
@@ -93,9 +86,9 @@ static struct lu_kmem_descr lu_ref_caches[] = {
static LIST_HEAD(lu_ref_refs);
static spinlock_t 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),
- .lf_linkage = LIST_HEAD_INIT(lu_ref_marker.lf_linkage)
+ .lf_guard = __SPIN_LOCK_UNLOCKED(lu_ref_marker.lf_guard),
+ .lf_list = LIST_HEAD_INIT(lu_ref_marker.lf_list),
+ .lf_linkage = LIST_HEAD_INIT(lu_ref_marker.lf_linkage)
};
void lu_ref_print(const struct lu_ref *ref)
@@ -186,21 +179,33 @@ static struct lu_ref_link *lu_ref_add_context(struct lu_ref *ref,
return link;
}
-struct lu_ref_link *lu_ref_add(struct lu_ref *ref, const char *scope,
- const void *source)
+void lu_ref_add(struct lu_ref *ref, const char *scope, const void *source)
{
might_sleep();
- return lu_ref_add_context(ref, GFP_IOFS, scope, source);
+ lu_ref_add_context(ref, GFP_IOFS, scope, source);
}
EXPORT_SYMBOL(lu_ref_add);
+void lu_ref_add_at(struct lu_ref *ref, struct lu_ref_link *link,
+ const char *scope, const void *source)
+{
+ 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++;
+ spin_unlock(&ref->lf_guard);
+}
+EXPORT_SYMBOL(lu_ref_add_at);
+
/**
* Version of lu_ref_add() to be used in non-blockable contexts.
*/
-struct lu_ref_link *lu_ref_add_atomic(struct lu_ref *ref, const char *scope,
- const void *source)
+void lu_ref_add_atomic(struct lu_ref *ref, const char *scope,
+ const void *source)
{
- return lu_ref_add_context(ref, GFP_ATOMIC, scope, source);
+ lu_ref_add_context(ref, GFP_ATOMIC, scope, source);
}
EXPORT_SYMBOL(lu_ref_add_atomic);
@@ -262,14 +267,12 @@ void lu_ref_set_at(struct lu_ref *ref, struct lu_ref_link *link,
const char *scope,
const void *source0, const void *source1)
{
+ REFASSERT(ref, link != NULL && !IS_ERR(link));
+
spin_lock(&ref->lf_guard);
- if (link != ERR_PTR(-ENOMEM)) {
- REFASSERT(ref, link->ll_ref == ref);
- REFASSERT(ref, lu_ref_link_eq(link, scope, source0));
- link->ll_source = source1;
- } else {
- REFASSERT(ref, ref->lf_failed > 0);
- }
+ REFASSERT(ref, link->ll_ref == ref);
+ REFASSERT(ref, lu_ref_link_eq(link, scope, source0));
+ link->ll_source = source1;
spin_unlock(&ref->lf_guard);
}
EXPORT_SYMBOL(lu_ref_set_at);
@@ -277,20 +280,13 @@ EXPORT_SYMBOL(lu_ref_set_at);
void lu_ref_del_at(struct lu_ref *ref, struct lu_ref_link *link,
const char *scope, const void *source)
{
- if (link != ERR_PTR(-ENOMEM)) {
- spin_lock(&ref->lf_guard);
- REFASSERT(ref, link->ll_ref == ref);
- REFASSERT(ref, lu_ref_link_eq(link, scope, source));
- list_del(&link->ll_linkage);
- ref->lf_refs--;
- spin_unlock(&ref->lf_guard);
- OBD_SLAB_FREE(link, lu_ref_link_kmem, sizeof(*link));
- } else {
- spin_lock(&ref->lf_guard);
- REFASSERT(ref, ref->lf_failed > 0);
- ref->lf_failed--;
- spin_unlock(&ref->lf_guard);
- }
+ REFASSERT(ref, link != NULL && !IS_ERR(link));
+ spin_lock(&ref->lf_guard);
+ REFASSERT(ref, link->ll_ref == ref);
+ REFASSERT(ref, lu_ref_link_eq(link, scope, source));
+ list_del(&link->ll_linkage);
+ ref->lf_refs--;
+ spin_unlock(&ref->lf_guard);
}
EXPORT_SYMBOL(lu_ref_del_at);
@@ -418,6 +414,8 @@ static struct file_operations lu_ref_dump_fops = {
.release = lu_ref_seq_release
};
+#endif
+
int lu_ref_global_init(void)
{
int result;
diff --git a/drivers/staging/lustre/lustre/osc/osc_cache.c b/drivers/staging/lustre/lustre/osc/osc_cache.c
index 0a0ec6f..6b0a842 100644
--- a/drivers/staging/lustre/lustre/osc/osc_cache.c
+++ b/drivers/staging/lustre/lustre/osc/osc_cache.c
@@ -2064,7 +2064,7 @@ static void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli,
while ((osc = osc_next_obj(cli)) != NULL) {
struct cl_object *obj = osc2cl(osc);
- struct lu_ref_link *link;
+ struct lu_ref_link link;
OSC_IO_DEBUG(osc, "%lu in flight\n", rpcs_in_flight(cli));
@@ -2075,7 +2075,8 @@ static void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli,
cl_object_get(obj);
client_obd_list_unlock(&cli->cl_loi_list_lock);
- link = lu_object_ref_add(&obj->co_lu, "check", current);
+ lu_object_ref_add_at(&obj->co_lu, &link, "check",
+ current);
/* attempt some read/write balancing by alternating between
* reads and writes in an object. The makes_rpc checks here
@@ -2116,7 +2117,8 @@ static void osc_check_rpcs(const struct lu_env *env, struct client_obd *cli,
osc_object_unlock(osc);
osc_list_maint(cli, osc);
- lu_object_ref_del_at(&obj->co_lu, link, "check", current);
+ lu_object_ref_del_at(&obj->co_lu, &link, "check",
+ current);
cl_object_put(env, obj);
client_obd_list_lock(&cli->cl_loi_list_lock);
--
1.7.9.5
--
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