From a6795e9ebb420d87af43789174689af0d66d1d35 Mon Sep 17 00:00:00 2001 From: Joel Becker Date: Thu, 17 Jul 2008 15:21:29 -0700 Subject: configfs: Allow ->make_item() and ->make_group() to return detailed errors. The configfs operations ->make_item() and ->make_group() currently return a new item/group. A return of NULL signifies an error. Because of this, -ENOMEM is the only return code bubbled up the stack. Multiple folks have requested the ability to return specific error codes when these operations fail. This patch adds that ability by changing the ->make_item/group() ops to return ERR_PTR() values. These errors are bubbled up appropriately. NULL returns are changed to -ENOMEM for compatibility. Also updated are the in-kernel users of configfs. This is a rework of reverted commit 11c3b79218390a139f2d474ee1e983a672d5839a. Signed-off-by: Joel Becker --- fs/ocfs2/cluster/heartbeat.c | 10 ++-------- fs/ocfs2/cluster/nodemanager.c | 16 +++++----------- 2 files changed, 7 insertions(+), 19 deletions(-) (limited to 'fs/ocfs2') diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c index f02ccb34604d..7dce1612553e 100644 --- a/fs/ocfs2/cluster/heartbeat.c +++ b/fs/ocfs2/cluster/heartbeat.c @@ -1493,24 +1493,18 @@ static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *g const char *name) { struct o2hb_region *reg = NULL; - struct config_item *ret = NULL; reg = kzalloc(sizeof(struct o2hb_region), GFP_KERNEL); if (reg == NULL) - goto out; /* ENOMEM */ + return ERR_PTR(-ENOMEM); config_item_init_type_name(®->hr_item, name, &o2hb_region_type); - ret = ®->hr_item; - spin_lock(&o2hb_live_lock); list_add_tail(®->hr_all_item, &o2hb_all_regions); spin_unlock(&o2hb_live_lock); -out: - if (ret == NULL) - kfree(reg); - return ret; + return ®->hr_item; } static void o2hb_heartbeat_group_drop_item(struct config_group *group, diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c index cfdb08b484ed..816a3f61330c 100644 --- a/fs/ocfs2/cluster/nodemanager.c +++ b/fs/ocfs2/cluster/nodemanager.c @@ -648,26 +648,19 @@ static struct config_item *o2nm_node_group_make_item(struct config_group *group, const char *name) { struct o2nm_node *node = NULL; - struct config_item *ret = NULL; if (strlen(name) > O2NM_MAX_NAME_LEN) - goto out; /* ENAMETOOLONG */ + return ERR_PTR(-ENAMETOOLONG); node = kzalloc(sizeof(struct o2nm_node), GFP_KERNEL); if (node == NULL) - goto out; /* ENOMEM */ + return ERR_PTR(-ENOMEM); strcpy(node->nd_name, name); /* use item.ci_namebuf instead? */ config_item_init_type_name(&node->nd_item, name, &o2nm_node_type); spin_lock_init(&node->nd_lock); - ret = &node->nd_item; - -out: - if (ret == NULL) - kfree(node); - - return ret; + return &node->nd_item; } static void o2nm_node_group_drop_item(struct config_group *group, @@ -762,7 +755,7 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g /* this runs under the parent dir's i_mutex; there can be only * one caller in here at a time */ if (o2nm_single_cluster) - goto out; /* ENOSPC */ + return ERR_PTR(-ENOSPC); cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL); ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL); @@ -795,6 +788,7 @@ out: kfree(ns); o2hb_free_hb_set(o2hb_group); kfree(defs); + ret = ERR_PTR(-ENOMEM); } return ret; -- cgit v1.2.2