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new helpers: ns_alloc_inum/ns_free_inum

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take struct ns_common *, for now simply wrappers around proc_{alloc,free}_inum()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2014-11-01 00:45:45 -04:00
parent 64964528b2
commit 6344c433a4
7 changed files with 16 additions and 13 deletions
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4
fs/namespace.c
View File

@ -2645,7 +2645,7 @@ dput_out:
static void free_mnt_ns(struct mnt_namespace *ns)
{
proc_free_inum(ns->ns.inum);
ns_free_inum(&ns->ns);
put_user_ns(ns->user_ns);
kfree(ns);
}
@ -2667,7 +2667,7 @@ static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns)
new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
if (!new_ns)
return ERR_PTR(-ENOMEM);
ret = proc_alloc_inum(&new_ns->ns.inum);
ret = ns_alloc_inum(&new_ns->ns);
if (ret) {
kfree(new_ns);
return ERR_PTR(ret);

3
include/linux/proc_ns.h
View File

@ -71,4 +71,7 @@ static inline bool proc_ns_inode(struct inode *inode) { return false; }
#endif /* CONFIG_PROC_FS */
#define ns_alloc_inum(ns) proc_alloc_inum(&(ns)->inum)
#define ns_free_inum(ns) proc_free_inum((ns)->inum)
#endif /* _LINUX_PROC_NS_H */

6
ipc/namespace.c
View File

@ -26,7 +26,7 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
if (ns == NULL)
return ERR_PTR(-ENOMEM);
err = proc_alloc_inum(&ns->ns.inum);
err = ns_alloc_inum(&ns->ns);
if (err) {
kfree(ns);
return ERR_PTR(err);
@ -35,7 +35,7 @@ static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
atomic_set(&ns->count, 1);
err = mq_init_ns(ns);
if (err) {
proc_free_inum(ns->ns.inum);
ns_free_inum(&ns->ns);
kfree(ns);
return ERR_PTR(err);
}
@ -119,7 +119,7 @@ static void free_ipc_ns(struct ipc_namespace *ns)
*/
ipcns_notify(IPCNS_REMOVED);
put_user_ns(ns->user_ns);
proc_free_inum(ns->ns.inum);
ns_free_inum(&ns->ns);
kfree(ns);
}

4
kernel/pid_namespace.c
View File

@ -105,7 +105,7 @@ static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns
if (ns->pid_cachep == NULL)
goto out_free_map;
err = proc_alloc_inum(&ns->ns.inum);
err = ns_alloc_inum(&ns->ns);
if (err)
goto out_free_map;
@ -142,7 +142,7 @@ static void destroy_pid_namespace(struct pid_namespace *ns)
{
int i;
proc_free_inum(ns->ns.inum);
ns_free_inum(&ns->ns);
for (i = 0; i < PIDMAP_ENTRIES; i++)
kfree(ns->pidmap[i].page);
put_user_ns(ns->user_ns);

4
kernel/user_namespace.c
View File

@ -86,7 +86,7 @@ int create_user_ns(struct cred *new)
if (!ns)
return -ENOMEM;
ret = proc_alloc_inum(&ns->ns.inum);
ret = ns_alloc_inum(&ns->ns);
if (ret) {
kmem_cache_free(user_ns_cachep, ns);
return ret;
@ -136,7 +136,7 @@ void free_user_ns(struct user_namespace *ns)
#ifdef CONFIG_PERSISTENT_KEYRINGS
key_put(ns->persistent_keyring_register);
#endif
proc_free_inum(ns->ns.inum);
ns_free_inum(&ns->ns);
kmem_cache_free(user_ns_cachep, ns);
ns = parent;
} while (atomic_dec_and_test(&parent->count));

4
kernel/utsname.c
View File

@ -42,7 +42,7 @@ static struct uts_namespace *clone_uts_ns(struct user_namespace *user_ns,
if (!ns)
return ERR_PTR(-ENOMEM);
err = proc_alloc_inum(&ns->ns.inum);
err = ns_alloc_inum(&ns->ns);
if (err) {
kfree(ns);
return ERR_PTR(err);
@ -84,7 +84,7 @@ void free_uts_ns(struct kref *kref)
ns = container_of(kref, struct uts_namespace, kref);
put_user_ns(ns->user_ns);
proc_free_inum(ns->ns.inum);
ns_free_inum(&ns->ns);
kfree(ns);
}

4
net/core/net_namespace.c
View File

@ -386,12 +386,12 @@ EXPORT_SYMBOL_GPL(get_net_ns_by_pid);
static __net_init int net_ns_net_init(struct net *net)
{
return proc_alloc_inum(&net->ns.inum);
return ns_alloc_inum(&net->ns);
}
static __net_exit void net_ns_net_exit(struct net *net)
{
proc_free_inum(net->ns.inum);
ns_free_inum(&net->ns);
}
static struct pernet_operations __net_initdata net_ns_ops = {