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authorCedric Le Goater <clg@fr.ibm.com>2007-07-15 23:40:58 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 09:05:47 -0700
commit7d69a1f4a72b18876c99c697692b78339d491568 (patch)
treec09faf07f15240592919ec7e3dd722fe4f1dd370
parent522ed7767e800cff6c650ec64b0ee0677303119c (diff)
downloadlinux-7d69a1f4a72b18876c99c697692b78339d491568.tar.gz
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: Cedric Le Goater <clg@fr.ibm.com> Acked-by: "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: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/ipc.h11
-rw-r--r--include/linux/utsname.h13
-rw-r--r--init/Kconfig17
-rw-r--r--ipc/msg.c4
-rw-r--r--ipc/sem.c4
-rw-r--r--ipc/shm.c4
-rw-r--r--ipc/util.c11
-rw-r--r--ipc/util.h8
-rw-r--r--kernel/Makefile4
-rw-r--r--kernel/nsproxy.c10
-rw-r--r--kernel/utsname_sysctl.c5
11 files changed, 12 insertions, 79 deletions
diff --git a/include/linux/ipc.h b/include/linux/ipc.h
index 7c8c6d8d090c..3fd3ddd5f0d9 100644
--- a/include/linux/ipc.h
+++ b/include/linux/ipc.h
@@ -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 */
-
-
diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index f8d3b326e93a..51ad167611e4 100644
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.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;
diff --git a/init/Kconfig b/init/Kconfig
index 73e91983760f..1e198b8c6936 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -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
diff --git a/ipc/msg.c b/ipc/msg.c
index a388824740e7..cbd27e519943 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -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)
{
diff --git a/ipc/sem.c b/ipc/sem.c
index 9964b2224c70..89bfdffb38d8 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -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)
{
diff --git a/ipc/shm.c b/ipc/shm.c
index 0852f206d895..242c3f66493a 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -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)
{
diff --git a/ipc/util.c b/ipc/util.c
index 7536a7292d48..44e5135aee47 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -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;
diff --git a/ipc/util.h b/ipc/util.h
index e3aa2c5c97dc..333e891bcaca 100644
--- a/ipc/util.h
+++ b/ipc/util.h
@@ -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 *));
diff --git a/kernel/Makefile b/kernel/Makefile
index 642d4277c2ea..fa8efd437afb 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -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
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index 9e83b589f754..e38bed75367d 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -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;
diff --git a/kernel/utsname_sysctl.c b/kernel/utsname_sysctl.c
index f22b9dbd2a9c..c76c06466bfd 100644
--- a/kernel/utsname_sysctl.c
+++ b/kernel/utsname_sysctl.c
@@ -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