[PATCH -mm] remove CONFIG_UTS_NS and CONFIG_IPC_NS

From: Cedric Le Goater
Date: Fri Jun 08 2007 - 07:49:08 EST

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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@xxxxxxxxxx>
Acked-by: "Serge E. Hallyn" <serue@xxxxxxxxxx>
Cc: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Herbert Poetzl <herbert@xxxxxxxxxxxx>
Cc: Pavel Emelianov <xemul@xxxxxxxxxx>
---
include/linux/ipc.h | 11 +++--------
include/linux/utsname.h | 13 -------------
init/Kconfig | 17 -----------------
ipc/msg.c | 4 +---
ipc/sem.c | 4 +---
ipc/shm.c | 4 +---
ipc/util.c | 11 +----------
ipc/util.h | 8 ++------
kernel/Makefile | 4 ++--
kernel/nsproxy.c | 10 ----------
kernel/utsname_sysctl.c | 5 +----
11 files changed, 12 insertions(+), 79 deletions(-)

Index: 2.6.22-rc4-mm2/include/linux/utsname.h
===================================================================
--- 2.6.22-rc4-mm2.orig/include/linux/utsname.h
+++ 2.6.22-rc4-mm2/include/linux/utsname.h
@@ -48,7 +48,6 @@ static inline void get_uts_ns(struct uts
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
{
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;
Index: 2.6.22-rc4-mm2/init/Kconfig
===================================================================
--- 2.6.22-rc4-mm2.orig/init/Kconfig
+++ 2.6.22-rc4-mm2/init/Kconfig
@@ -142,15 +142,6 @@ 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
@@ -240,14 +231,6 @@ 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
Index: 2.6.22-rc4-mm2/kernel/Makefile
===================================================================
--- 2.6.22-rc4-mm2.orig/kernel/Makefile
+++ 2.6.22-rc4-mm2/kernel/Makefile
@@ -8,7 +8,8 @@ obj-y = sched.o fork.o exec_domain.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-$(CONFIG_STACKTRACE) += stacktrace.o
obj-y += time/
@@ -53,7 +54,6 @@ obj-$(CONFIG_DEBUG_SYNCHRO_TEST) += sync
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

Index: 2.6.22-rc4-mm2/include/linux/ipc.h
===================================================================
--- 2.6.22-rc4-mm2.orig/include/linux/ipc.h
+++ 2.6.22-rc4-mm2/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
}
#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_

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
#endif /* __KERNEL__ */

#endif /* _LINUX_IPC_H */
-
-
Index: 2.6.22-rc4-mm2/ipc/msg.c
===================================================================
--- 2.6.22-rc4-mm2.orig/ipc/msg.c
+++ 2.6.22-rc4-mm2/ipc/msg.c
@@ -87,7 +87,7 @@ static int newque (struct ipc_namespace
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(str
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 *n
kfree(ns->ids[IPC_MSG_IDS]);
ns->ids[IPC_MSG_IDS] = NULL;
}
-#endif

void __init msg_init(void)
{
Index: 2.6.22-rc4-mm2/ipc/sem.c
===================================================================
--- 2.6.22-rc4-mm2.orig/ipc/sem.c
+++ 2.6.22-rc4-mm2/ipc/sem.c
@@ -121,7 +121,7 @@ static int sysvipc_sem_proc_show(struct
#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(str
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 *n
kfree(ns->ids[IPC_SEM_IDS]);
ns->ids[IPC_SEM_IDS] = NULL;
}
-#endif

void __init sem_init (void)
{
Index: 2.6.22-rc4-mm2/ipc/shm.c
===================================================================
--- 2.6.22-rc4-mm2.orig/ipc/shm.c
+++ 2.6.22-rc4-mm2/ipc/shm.c
@@ -77,7 +77,7 @@ static void shm_destroy (struct ipc_name
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_names
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 *n
kfree(ns->ids[IPC_SHM_IDS]);
ns->ids[IPC_SHM_IDS] = NULL;
}
-#endif

void __init shm_init (void)
{
Index: 2.6.22-rc4-mm2/ipc/util.c
===================================================================
--- 2.6.22-rc4-mm2.orig/ipc/util.c
+++ 2.6.22-rc4-mm2/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;

Index: 2.6.22-rc4-mm2/ipc/util.h
===================================================================
--- 2.6.22-rc4-mm2.orig/ipc/util.h
+++ 2.6.22-rc4-mm2/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 *));
Index: 2.6.22-rc4-mm2/kernel/utsname_sysctl.c
===================================================================
--- 2.6.22-rc4-mm2.orig/kernel/utsname_sysctl.c
+++ 2.6.22-rc4-mm2/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
Index: 2.6.22-rc4-mm2/kernel/nsproxy.c
===================================================================
--- 2.6.22-rc4-mm2.orig/kernel/nsproxy.c
+++ 2.6.22-rc4-mm2/kernel/nsproxy.c
@@ -157,16 +157,6 @@ int unshare_nsproxy_namespaces(unsigned
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;

-
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Next message: Hans-Christian Egtvedt: "[PATCH 1/1] Driver for the Atmel on-chip RTC on AT32AP700x devices."
Previous message: David Woodhouse: "Re: [SERIAL] Don't optimise away baud rate changes when BOTHER isused"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]