Commit 7d69a1f4 authored by Cedric Le Goater's avatar Cedric Le Goater Committed by Linus Torvalds

remove CONFIG_UTS_NS and CONFIG_IPC_NS

CONFIG_UTS_NS and CONFIG_IPC_NS have very little value as they only
deactivate the unshare of the uts and ipc namespaces and do not improve
performance.
Signed-off-by: default avatarCedric Le Goater <clg@fr.ibm.com>
Acked-by: default avatar"Serge E. Hallyn" <serue@us.ibm.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Pavel Emelianov <xemul@openvz.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 522ed776
......@@ -93,6 +93,7 @@ extern struct ipc_namespace init_ipc_ns;
#ifdef CONFIG_SYSVIPC
#define INIT_IPC_NS(ns) .ns = &init_ipc_ns,
extern void free_ipc_ns(struct kref *kref);
extern struct ipc_namespace *copy_ipcs(unsigned long flags,
struct ipc_namespace *ns);
#else
......@@ -104,13 +105,9 @@ static inline struct ipc_namespace *copy_ipcs(unsigned long flags,
}
#endif
#ifdef CONFIG_IPC_NS
extern void free_ipc_ns(struct kref *kref);
#endif
static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
{
#ifdef CONFIG_IPC_NS
#ifdef CONFIG_SYSVIPC
if (ns)
kref_get(&ns->kref);
#endif
......@@ -119,7 +116,7 @@ static inline struct ipc_namespace *get_ipc_ns(struct ipc_namespace *ns)
static inline void put_ipc_ns(struct ipc_namespace *ns)
{
#ifdef CONFIG_IPC_NS
#ifdef CONFIG_SYSVIPC
kref_put(&ns->kref, free_ipc_ns);
#endif
}
......@@ -127,5 +124,3 @@ static inline void put_ipc_ns(struct ipc_namespace *ns)
#endif /* __KERNEL__ */
#endif /* _LINUX_IPC_H */
......@@ -48,7 +48,6 @@ static inline void get_uts_ns(struct uts_namespace *ns)
kref_get(&ns->kref);
}
#ifdef CONFIG_UTS_NS
extern struct uts_namespace *copy_utsname(int flags, struct uts_namespace *ns);
extern void free_uts_ns(struct kref *kref);
......@@ -56,18 +55,6 @@ static inline void put_uts_ns(struct uts_namespace *ns)
{
kref_put(&ns->kref, free_uts_ns);
}
#else
static inline struct uts_namespace *copy_utsname(int flags,
struct uts_namespace *ns)
{
return ns;
}
static inline void put_uts_ns(struct uts_namespace *ns)
{
}
#endif
static inline struct new_utsname *utsname(void)
{
return &current->nsproxy->uts_ns->name;
......
......@@ -120,15 +120,6 @@ config SYSVIPC
section 6.4 of the Linux Programmer's Guide, available from
<http://www.tldp.org/guides.html>.
config IPC_NS
bool "IPC Namespaces"
depends on SYSVIPC
default n
help
Support ipc namespaces. This allows containers, i.e. virtual
environments, to use ipc namespaces to provide different ipc
objects for different servers. If unsure, say N.
config SYSVIPC_SYSCTL
bool
depends on SYSVIPC
......@@ -218,14 +209,6 @@ config TASK_IO_ACCOUNTING
Say N if unsure.
config UTS_NS
bool "UTS Namespaces"
default n
help
Support uts namespaces. This allows containers, i.e.
vservers, to use uts namespaces to provide different
uts info for different servers. If unsure, say N.
config AUDIT
bool "Auditing support"
depends on NET
......
......@@ -87,7 +87,7 @@ static int newque (struct ipc_namespace *ns, key_t key, int msgflg);
static int sysvipc_msg_proc_show(struct seq_file *s, void *it);
#endif
static void __ipc_init __msg_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
static void __msg_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
{
ns->ids[IPC_MSG_IDS] = ids;
ns->msg_ctlmax = MSGMAX;
......@@ -96,7 +96,6 @@ static void __ipc_init __msg_init_ns(struct ipc_namespace *ns, struct ipc_ids *i
ipc_init_ids(ids, ns->msg_ctlmni);
}
#ifdef CONFIG_IPC_NS
int msg_init_ns(struct ipc_namespace *ns)
{
struct ipc_ids *ids;
......@@ -128,7 +127,6 @@ void msg_exit_ns(struct ipc_namespace *ns)
kfree(ns->ids[IPC_MSG_IDS]);
ns->ids[IPC_MSG_IDS] = NULL;
}
#endif
void __init msg_init(void)
{
......
......@@ -121,7 +121,7 @@ static int sysvipc_sem_proc_show(struct seq_file *s, void *it);
#define sc_semopm sem_ctls[2]
#define sc_semmni sem_ctls[3]
static void __ipc_init __sem_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
static void __sem_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
{
ns->ids[IPC_SEM_IDS] = ids;
ns->sc_semmsl = SEMMSL;
......@@ -132,7 +132,6 @@ static void __ipc_init __sem_init_ns(struct ipc_namespace *ns, struct ipc_ids *i
ipc_init_ids(ids, ns->sc_semmni);
}
#ifdef CONFIG_IPC_NS
int sem_init_ns(struct ipc_namespace *ns)
{
struct ipc_ids *ids;
......@@ -164,7 +163,6 @@ void sem_exit_ns(struct ipc_namespace *ns)
kfree(ns->ids[IPC_SEM_IDS]);
ns->ids[IPC_SEM_IDS] = NULL;
}
#endif
void __init sem_init (void)
{
......
......@@ -77,7 +77,7 @@ static void shm_destroy (struct ipc_namespace *ns, struct shmid_kernel *shp);
static int sysvipc_shm_proc_show(struct seq_file *s, void *it);
#endif
static void __ipc_init __shm_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
static void __shm_init_ns(struct ipc_namespace *ns, struct ipc_ids *ids)
{
ns->ids[IPC_SHM_IDS] = ids;
ns->shm_ctlmax = SHMMAX;
......@@ -98,7 +98,6 @@ static void do_shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *shp)
shm_destroy(ns, shp);
}
#ifdef CONFIG_IPC_NS
int shm_init_ns(struct ipc_namespace *ns)
{
struct ipc_ids *ids;
......@@ -130,7 +129,6 @@ void shm_exit_ns(struct ipc_namespace *ns)
kfree(ns->ids[IPC_SHM_IDS]);
ns->ids[IPC_SHM_IDS] = NULL;
}
#endif
void __init shm_init (void)
{
......
......@@ -50,7 +50,6 @@ struct ipc_namespace init_ipc_ns = {
},
};
#ifdef CONFIG_IPC_NS
static struct ipc_namespace *clone_ipc_ns(struct ipc_namespace *old_ns)
{
int err;
......@@ -110,14 +109,6 @@ void free_ipc_ns(struct kref *kref)
shm_exit_ns(ns);
kfree(ns);
}
#else
struct ipc_namespace *copy_ipcs(unsigned long flags, struct ipc_namespace *ns)
{
if (flags & CLONE_NEWIPC)
return ERR_PTR(-EINVAL);
return ns;
}
#endif
/**
* ipc_init - initialise IPC subsystem
......@@ -145,7 +136,7 @@ __initcall(ipc_init);
* array itself.
*/
void __ipc_init ipc_init_ids(struct ipc_ids* ids, int size)
void ipc_init_ids(struct ipc_ids* ids, int size)
{
int i;
......
......@@ -41,12 +41,8 @@ struct ipc_ids {
};
struct seq_file;
#ifdef CONFIG_IPC_NS
#define __ipc_init
#else
#define __ipc_init __init
#endif
void __ipc_init ipc_init_ids(struct ipc_ids *ids, int size);
void ipc_init_ids(struct ipc_ids *ids, int size);
#ifdef CONFIG_PROC_FS
void __init ipc_init_proc_interface(const char *path, const char *header,
int ids, int (*show)(struct seq_file *, void *));
......
......@@ -8,7 +8,8 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o profile.o \
signal.o sys.o kmod.o workqueue.o pid.o \
rcupdate.o extable.o params.o posix-timers.o \
kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
hrtimer.o rwsem.o latency.o nsproxy.o srcu.o die_notifier.o
hrtimer.o rwsem.o latency.o nsproxy.o srcu.o die_notifier.o \
utsname.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-y += time/
......@@ -48,7 +49,6 @@ obj-$(CONFIG_SECCOMP) += seccomp.o
obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
obj-$(CONFIG_RELAY) += relay.o
obj-$(CONFIG_SYSCTL) += utsname_sysctl.o
obj-$(CONFIG_UTS_NS) += utsname.o
obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o
obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o
......
......@@ -155,16 +155,6 @@ int unshare_nsproxy_namespaces(unsigned long unshare_flags,
if (!(unshare_flags & (CLONE_NEWNS | CLONE_NEWUTS | CLONE_NEWIPC)))
return 0;
#ifndef CONFIG_IPC_NS
if (unshare_flags & CLONE_NEWIPC)
return -EINVAL;
#endif
#ifndef CONFIG_UTS_NS
if (unshare_flags & CLONE_NEWUTS)
return -EINVAL;
#endif
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
......
......@@ -18,10 +18,7 @@
static void *get_uts(ctl_table *table, int write)
{
char *which = table->data;
#ifdef CONFIG_UTS_NS
struct uts_namespace *uts_ns = current->nsproxy->uts_ns;
which = (which - (char *)&init_uts_ns) + (char *)uts_ns;
#endif
if (!write)
down_read(&uts_sem);
else
......
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