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-rw-r--r--Documentation/filesystems/configfs/configfs.txt10
-rw-r--r--Documentation/filesystems/configfs/configfs_example.c14
-rw-r--r--drivers/net/netconsole.c10
-rw-r--r--fs/configfs/dir.c13
-rw-r--r--fs/dlm/config.c45
-rw-r--r--fs/ocfs2/cluster/heartbeat.c17
-rw-r--r--fs/ocfs2/cluster/nodemanager.c45
-rw-r--r--include/linux/configfs.h4
8 files changed, 94 insertions, 64 deletions
diff --git a/Documentation/filesystems/configfs/configfs.txt b/Documentation/filesystems/configfs/configfs.txt
index 44c97e6accb2..15838d706ea2 100644
--- a/Documentation/filesystems/configfs/configfs.txt
+++ b/Documentation/filesystems/configfs/configfs.txt
@@ -233,10 +233,12 @@ accomplished via the group operations specified on the group's
config_item_type.
struct configfs_group_operations {
- struct config_item *(*make_item)(struct config_group *group,
- const char *name);
- struct config_group *(*make_group)(struct config_group *group,
- const char *name);
+ int (*make_item)(struct config_group *group,
+ const char *name,
+ struct config_item **new_item);
+ int (*make_group)(struct config_group *group,
+ const char *name,
+ struct config_group **new_group);
int (*commit_item)(struct config_item *item);
void (*disconnect_notify)(struct config_group *group,
struct config_item *item);
diff --git a/Documentation/filesystems/configfs/configfs_example.c b/Documentation/filesystems/configfs/configfs_example.c
index 25151fd5c2c6..0b422acd470c 100644
--- a/Documentation/filesystems/configfs/configfs_example.c
+++ b/Documentation/filesystems/configfs/configfs_example.c
@@ -273,13 +273,13 @@ static inline struct simple_children *to_simple_children(struct config_item *ite
return item ? container_of(to_config_group(item), struct simple_children, group) : NULL;
}
-static struct config_item *simple_children_make_item(struct config_group *group, const char *name)
+static int simple_children_make_item(struct config_group *group, const char *name, struct config_item **new_item)
{
struct simple_child *simple_child;
simple_child = kzalloc(sizeof(struct simple_child), GFP_KERNEL);
if (!simple_child)
- return NULL;
+ return -ENOMEM;
config_item_init_type_name(&simple_child->item, name,
@@ -287,7 +287,8 @@ static struct config_item *simple_children_make_item(struct config_group *group,
simple_child->storeme = 0;
- return &simple_child->item;
+ *new_item = &simple_child->item;
+ return 0;
}
static struct configfs_attribute simple_children_attr_description = {
@@ -359,20 +360,21 @@ static struct configfs_subsystem simple_children_subsys = {
* children of its own.
*/
-static struct config_group *group_children_make_group(struct config_group *group, const char *name)
+static int group_children_make_group(struct config_group *group, const char *name, struct config_group **new_group)
{
struct simple_children *simple_children;
simple_children = kzalloc(sizeof(struct simple_children),
GFP_KERNEL);
if (!simple_children)
- return NULL;
+ return -ENOMEM;
config_group_init_type_name(&simple_children->group, name,
&simple_children_type);
- return &simple_children->group;
+ *new_group = &simple_children->group;
+ return 0;
}
static struct configfs_attribute group_children_attr_description = {
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 665341e43055..387a13395015 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c
@@ -585,8 +585,9 @@ static struct config_item_type netconsole_target_type = {
* Group operations and type for netconsole_subsys.
*/
-static struct config_item *make_netconsole_target(struct config_group *group,
- const char *name)
+static int make_netconsole_target(struct config_group *group,
+ const char *name,
+ struct config_item **new_item)
{
unsigned long flags;
struct netconsole_target *nt;
@@ -598,7 +599,7 @@ static struct config_item *make_netconsole_target(struct config_group *group,
nt = kzalloc(sizeof(*nt), GFP_KERNEL);
if (!nt) {
printk(KERN_ERR "netconsole: failed to allocate memory\n");
- return NULL;
+ return -ENOMEM;
}
nt->np.name = "netconsole";
@@ -615,7 +616,8 @@ static struct config_item *make_netconsole_target(struct config_group *group,
list_add(&nt->list, &target_list);
spin_unlock_irqrestore(&target_list_lock, flags);
- return &nt->item;
+ *new_item = &nt->item;
+ return 0;
}
static void drop_netconsole_target(struct config_group *group,
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 614e382a6049..0e64312a084c 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1073,25 +1073,24 @@ static int configfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
group = NULL;
item = NULL;
if (type->ct_group_ops->make_group) {
- group = type->ct_group_ops->make_group(to_config_group(parent_item), name);
- if (group) {
+ ret = type->ct_group_ops->make_group(to_config_group(parent_item), name, &group);
+ if (!ret) {
link_group(to_config_group(parent_item), group);
item = &group->cg_item;
}
} else {
- item = type->ct_group_ops->make_item(to_config_group(parent_item), name);
- if (item)
+ ret = type->ct_group_ops->make_item(to_config_group(parent_item), name, &item);
+ if (!ret)
link_obj(parent_item, item);
}
mutex_unlock(&subsys->su_mutex);
kfree(name);
- if (!item) {
+ if (ret) {
/*
- * If item == NULL, then link_obj() was never called.
+ * If ret != 0, then link_obj() was never called.
* There are no extra references to clean up.
*/
- ret = -ENOMEM;
goto out_put;
}
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index eac23bd288b2..492d8caaaf25 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -41,16 +41,20 @@ struct comm;
struct nodes;
struct node;
-static struct config_group *make_cluster(struct config_group *, const char *);
+static int make_cluster(struct config_group *, const char *,
+ struct config_group **);
static void drop_cluster(struct config_group *, struct config_item *);
static void release_cluster(struct config_item *);
-static struct config_group *make_space(struct config_group *, const char *);
+static int make_space(struct config_group *, const char *,
+ struct config_group **);
static void drop_space(struct config_group *, struct config_item *);
static void release_space(struct config_item *);
-static struct config_item *make_comm(struct config_group *, const char *);
+static int make_comm(struct config_group *, const char *,
+ struct config_item **);
static void drop_comm(struct config_group *, struct config_item *);
static void release_comm(struct config_item *);
-static struct config_item *make_node(struct config_group *, const char *);
+static int make_node(struct config_group *, const char *,
+ struct config_item **);
static void drop_node(struct config_group *, struct config_item *);
static void release_node(struct config_item *);
@@ -392,8 +396,8 @@ static struct node *to_node(struct config_item *i)
return i ? container_of(i, struct node, item) : NULL;
}
-static struct config_group *make_cluster(struct config_group *g,
- const char *name)
+static int make_cluster(struct config_group *g, const char *name,
+ struct config_group **new_g)
{
struct cluster *cl = NULL;
struct spaces *sps = NULL;
@@ -431,14 +435,15 @@ static struct config_group *make_cluster(struct config_group *g,
space_list = &sps->ss_group;
comm_list = &cms->cs_group;
- return &cl->group;
+ *new_g = &cl->group;
+ return 0;
fail:
kfree(cl);
kfree(gps);
kfree(sps);
kfree(cms);
- return NULL;
+ return -ENOMEM;
}
static void drop_cluster(struct config_group *g, struct config_item *i)
@@ -466,7 +471,8 @@ static void release_cluster(struct config_item *i)
kfree(cl);
}
-static struct config_group *make_space(struct config_group *g, const char *name)
+static int make_space(struct config_group *g, const char *name,
+ struct config_group **new_g)
{
struct space *sp = NULL;
struct nodes *nds = NULL;
@@ -489,13 +495,14 @@ static struct config_group *make_space(struct config_group *g, const char *name)
INIT_LIST_HEAD(&sp->members);
mutex_init(&sp->members_lock);
sp->members_count = 0;
- return &sp->group;
+ *new_g = &sp->group;
+ return 0;
fail:
kfree(sp);
kfree(gps);
kfree(nds);
- return NULL;
+ return -ENOMEM;
}
static void drop_space(struct config_group *g, struct config_item *i)
@@ -522,19 +529,21 @@ static void release_space(struct config_item *i)
kfree(sp);
}
-static struct config_item *make_comm(struct config_group *g, const char *name)
+static int make_comm(struct config_group *g, const char *name,
+ struct config_item **new_i)
{
struct comm *cm;
cm = kzalloc(sizeof(struct comm), GFP_KERNEL);
if (!cm)
- return NULL;
+ return -ENOMEM;
config_item_init_type_name(&cm->item, name, &comm_type);
cm->nodeid = -1;
cm->local = 0;
cm->addr_count = 0;
- return &cm->item;
+ *new_i = &cm->item;
+ return 0;
}
static void drop_comm(struct config_group *g, struct config_item *i)
@@ -554,14 +563,15 @@ static void release_comm(struct config_item *i)
kfree(cm);
}
-static struct config_item *make_node(struct config_group *g, const char *name)
+static int make_node(struct config_group *g, const char *name,
+ struct config_item **new_i)
{
struct space *sp = to_space(g->cg_item.ci_parent);
struct node *nd;
nd = kzalloc(sizeof(struct node), GFP_KERNEL);
if (!nd)
- return NULL;
+ return -ENOMEM;
config_item_init_type_name(&nd->item, name, &node_type);
nd->nodeid = -1;
@@ -573,7 +583,8 @@ static struct config_item *make_node(struct config_group *g, const char *name)
sp->members_count++;
mutex_unlock(&sp->members_lock);
- return &nd->item;
+ *new_i = &nd->item;
+ return 0;
}
static void drop_node(struct config_group *g, struct config_item *i)
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index f02ccb34604d..443d108211ab 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1489,25 +1489,28 @@ static struct o2hb_heartbeat_group *to_o2hb_heartbeat_group(struct config_group
: NULL;
}
-static struct config_item *o2hb_heartbeat_group_make_item(struct config_group *group,
- const char *name)
+static int o2hb_heartbeat_group_make_item(struct config_group *group,
+ const char *name,
+ struct config_item **new_item)
{
struct o2hb_region *reg = NULL;
- struct config_item *ret = NULL;
+ int ret = 0;
reg = kzalloc(sizeof(struct o2hb_region), GFP_KERNEL);
- if (reg == NULL)
- goto out; /* ENOMEM */
+ if (reg == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
config_item_init_type_name(&reg->hr_item, name, &o2hb_region_type);
- ret = &reg->hr_item;
+ *new_item = &reg->hr_item;
spin_lock(&o2hb_live_lock);
list_add_tail(&reg->hr_all_item, &o2hb_all_regions);
spin_unlock(&o2hb_live_lock);
out:
- if (ret == NULL)
+ if (ret)
kfree(reg);
return ret;
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index cfdb08b484ed..b364b7052e46 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -644,27 +644,32 @@ out:
return ret;
}
-static struct config_item *o2nm_node_group_make_item(struct config_group *group,
- const char *name)
+static int o2nm_node_group_make_item(struct config_group *group,
+ const char *name,
+ struct config_item **new_item)
{
struct o2nm_node *node = NULL;
- struct config_item *ret = NULL;
+ int ret = 0;
- if (strlen(name) > O2NM_MAX_NAME_LEN)
- goto out; /* ENAMETOOLONG */
+ if (strlen(name) > O2NM_MAX_NAME_LEN) {
+ ret = -ENAMETOOLONG;
+ goto out;
+ }
node = kzalloc(sizeof(struct o2nm_node), GFP_KERNEL);
- if (node == NULL)
- goto out; /* ENOMEM */
+ if (node == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
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;
+ *new_item = &node->nd_item;
out:
- if (ret == NULL)
+ if (ret)
kfree(node);
return ret;
@@ -751,25 +756,31 @@ static struct o2nm_cluster_group *to_o2nm_cluster_group(struct config_group *gro
}
#endif
-static struct config_group *o2nm_cluster_group_make_group(struct config_group *group,
- const char *name)
+static int o2nm_cluster_group_make_group(struct config_group *group,
+ const char *name,
+ struct config_group **new_group)
{
struct o2nm_cluster *cluster = NULL;
struct o2nm_node_group *ns = NULL;
- struct config_group *o2hb_group = NULL, *ret = NULL;
+ struct config_group *o2hb_group = NULL;
void *defs = NULL;
+ int ret = 0;
/* 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 */
+ if (o2nm_single_cluster) {
+ ret = -ENOSPC;
+ goto out;
+ }
cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL);
ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL);
defs = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
o2hb_group = o2hb_alloc_hb_set();
- if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL)
+ if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL) {
+ ret = -ENOMEM;
goto out;
+ }
config_group_init_type_name(&cluster->cl_group, name,
&o2nm_cluster_type);
@@ -786,11 +797,11 @@ static struct config_group *o2nm_cluster_group_make_group(struct config_group *g
cluster->cl_idle_timeout_ms = O2NET_IDLE_TIMEOUT_MS_DEFAULT;
cluster->cl_keepalive_delay_ms = O2NET_KEEPALIVE_DELAY_MS_DEFAULT;
- ret = &cluster->cl_group;
+ *new_group = &cluster->cl_group;
o2nm_single_cluster = cluster;
out:
- if (ret == NULL) {
+ if (ret) {
kfree(cluster);
kfree(ns);
o2hb_free_hb_set(o2hb_group);
diff --git a/include/linux/configfs.h b/include/linux/configfs.h
index 3ae65b1bf90f..0488f937634a 100644
--- a/include/linux/configfs.h
+++ b/include/linux/configfs.h
@@ -165,8 +165,8 @@ struct configfs_item_operations {
};
struct configfs_group_operations {
- struct config_item *(*make_item)(struct config_group *group, const char *name);
- struct config_group *(*make_group)(struct config_group *group, const char *name);
+ int (*make_item)(struct config_group *group, const char *name, struct config_item **new_item);
+ int (*make_group)(struct config_group *group, const char *name, struct config_group **new_group);
int (*commit_item)(struct config_item *item);
void (*disconnect_notify)(struct config_group *group, struct config_item *item);
void (*drop_item)(struct config_group *group, struct config_item *item);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 18:12:51 +0000