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ocfs2: further debugfs cleanups

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There is no need to check return value of debugfs_create functions, but
the last sweep through ocfs missed a number of places where this was
happening.  There is also no need to save the individual dentries for the
debugfs files, as everything is can just be removed at once when the
directory is removed.

By getting rid of the file dentries for the debugfs entries, a bit of
local memory can be saved as well.

[colin.king@canonical.com: ensure ret is set to zero before returning]
  Link: http://lkml.kernel.org/r/20190807121929.28918-1-colin.king@canonical.com
Link: http://lkml.kernel.org/r/20190731132119.GA12603@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jia Guo <guojia12@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Цей коміт міститься в:
Greg Kroah-Hartman
2019-09-23 15:33:15 -07:00
зафіксовано Linus Torvalds
джерело 963abb9aeb
коміт 5e7a3ed9f1
9 змінених файлів з 61 додано та 180 видалено
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103
fs/ocfs2/cluster/heartbeat.c
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@@ -225,10 +225,6 @@ struct o2hb_region {
unsigned int hr_region_num;
struct dentry *hr_debug_dir;
struct dentry *hr_debug_livenodes;
struct dentry *hr_debug_regnum;
struct dentry *hr_debug_elapsed_time;
struct dentry *hr_debug_pinned;
struct o2hb_debug_buf *hr_db_livenodes;
struct o2hb_debug_buf *hr_db_regnum;
struct o2hb_debug_buf *hr_db_elapsed_time;
@@ -1394,21 +1390,20 @@ void o2hb_exit(void)
kfree(o2hb_db_failedregions);
}
static struct dentry *o2hb_debug_create(const char *name, struct dentry *dir,
struct o2hb_debug_buf **db, int db_len,
int type, int size, int len, void *data)
static void o2hb_debug_create(const char *name, struct dentry *dir,
struct o2hb_debug_buf **db, int db_len, int type,
int size, int len, void *data)
{
*db = kmalloc(db_len, GFP_KERNEL);
if (!*db)
return NULL;
return;
(*db)->db_type = type;
(*db)->db_size = size;
(*db)->db_len = len;
(*db)->db_data = data;
return debugfs_create_file(name, S_IFREG|S_IRUSR, dir, *db,
&o2hb_debug_fops);
debugfs_create_file(name, S_IFREG|S_IRUSR, dir, *db, &o2hb_debug_fops);
}
static void o2hb_debug_init(void)
@@ -1525,11 +1520,7 @@ static void o2hb_region_release(struct config_item *item)
kfree(reg->hr_slots);
debugfs_remove(reg->hr_debug_livenodes);
debugfs_remove(reg->hr_debug_regnum);
debugfs_remove(reg->hr_debug_elapsed_time);
debugfs_remove(reg->hr_debug_pinned);
debugfs_remove(reg->hr_debug_dir);
debugfs_remove_recursive(reg->hr_debug_dir);
kfree(reg->hr_db_livenodes);
kfree(reg->hr_db_regnum);
kfree(reg->hr_db_elapsed_time);
@@ -1988,69 +1979,33 @@ static struct o2hb_heartbeat_group *to_o2hb_heartbeat_group(struct config_group
: NULL;
}
static int o2hb_debug_region_init(struct o2hb_region *reg, struct dentry *dir)
static void o2hb_debug_region_init(struct o2hb_region *reg,
struct dentry *parent)
{
int ret = -ENOMEM;
struct dentry *dir;
reg->hr_debug_dir =
debugfs_create_dir(config_item_name(&reg->hr_item), dir);
if (!reg->hr_debug_dir) {
mlog_errno(ret);
goto bail;
}
dir = debugfs_create_dir(config_item_name(&reg->hr_item), parent);
reg->hr_debug_dir = dir;
reg->hr_debug_livenodes =
o2hb_debug_create(O2HB_DEBUG_LIVENODES,
reg->hr_debug_dir,
&(reg->hr_db_livenodes),
sizeof(*(reg->hr_db_livenodes)),
O2HB_DB_TYPE_REGION_LIVENODES,
sizeof(reg->hr_live_node_bitmap),
O2NM_MAX_NODES, reg);
if (!reg->hr_debug_livenodes) {
mlog_errno(ret);
goto bail;
}
o2hb_debug_create(O2HB_DEBUG_LIVENODES, dir, &(reg->hr_db_livenodes),
sizeof(*(reg->hr_db_livenodes)),
O2HB_DB_TYPE_REGION_LIVENODES,
sizeof(reg->hr_live_node_bitmap), O2NM_MAX_NODES,
reg);
reg->hr_debug_regnum =
o2hb_debug_create(O2HB_DEBUG_REGION_NUMBER,
reg->hr_debug_dir,
&(reg->hr_db_regnum),
sizeof(*(reg->hr_db_regnum)),
O2HB_DB_TYPE_REGION_NUMBER,
0, O2NM_MAX_NODES, reg);
if (!reg->hr_debug_regnum) {
mlog_errno(ret);
goto bail;
}
o2hb_debug_create(O2HB_DEBUG_REGION_NUMBER, dir, &(reg->hr_db_regnum),
sizeof(*(reg->hr_db_regnum)),
O2HB_DB_TYPE_REGION_NUMBER, 0, O2NM_MAX_NODES, reg);
reg->hr_debug_elapsed_time =
o2hb_debug_create(O2HB_DEBUG_REGION_ELAPSED_TIME,
reg->hr_debug_dir,
&(reg->hr_db_elapsed_time),
sizeof(*(reg->hr_db_elapsed_time)),
O2HB_DB_TYPE_REGION_ELAPSED_TIME,
0, 0, reg);
if (!reg->hr_debug_elapsed_time) {
mlog_errno(ret);
goto bail;
}
o2hb_debug_create(O2HB_DEBUG_REGION_ELAPSED_TIME, dir,
&(reg->hr_db_elapsed_time),
sizeof(*(reg->hr_db_elapsed_time)),
O2HB_DB_TYPE_REGION_ELAPSED_TIME, 0, 0, reg);
reg->hr_debug_pinned =
o2hb_debug_create(O2HB_DEBUG_REGION_PINNED,
reg->hr_debug_dir,
&(reg->hr_db_pinned),
sizeof(*(reg->hr_db_pinned)),
O2HB_DB_TYPE_REGION_PINNED,
0, 0, reg);
if (!reg->hr_debug_pinned) {
mlog_errno(ret);
goto bail;
}
o2hb_debug_create(O2HB_DEBUG_REGION_PINNED, dir, &(reg->hr_db_pinned),
sizeof(*(reg->hr_db_pinned)),
O2HB_DB_TYPE_REGION_PINNED, 0, 0, reg);
ret = 0;
bail:
return ret;
}
static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *group,
@@ -2106,11 +2061,7 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g
if (ret)
goto unregister_handler;
ret = o2hb_debug_region_init(reg, o2hb_debug_dir);
if (ret) {
config_item_put(&reg->hr_item);
goto unregister_handler;
}
o2hb_debug_region_init(reg, o2hb_debug_dir);
return &reg->hr_item;