diff options
author | Badari Pulavarty <pbadari@us.ibm.com> | 2007-05-08 00:25:21 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-08 11:15:00 -0700 |
commit | e3222c4ecc649c4ae568e61dda9349482401b501 (patch) | |
tree | d96614ef67d947a3dd8ab0929a4755bce9fdbcc1 /include/linux/utsname.h | |
parent | 4fc75ff4816c3483b4b772b2f6cb3d8fd88ca547 (diff) | |
download | kernel_samsung_smdk4412-e3222c4ecc649c4ae568e61dda9349482401b501.zip kernel_samsung_smdk4412-e3222c4ecc649c4ae568e61dda9349482401b501.tar.gz kernel_samsung_smdk4412-e3222c4ecc649c4ae568e61dda9349482401b501.tar.bz2 |
Merge sys_clone()/sys_unshare() nsproxy and namespace handling
sys_clone() and sys_unshare() both makes copies of nsproxy and its associated
namespaces. But they have different code paths.
This patch merges all the nsproxy and its associated namespace copy/clone
handling (as much as possible). Posted on container list earlier for
feedback.
- Create a new nsproxy and its associated namespaces and pass it back to
caller to attach it to right process.
- Changed all copy_*_ns() routines to return a new copy of namespace
instead of attaching it to task->nsproxy.
- Moved the CAP_SYS_ADMIN checks out of copy_*_ns() routines.
- Removed unnessary !ns checks from copy_*_ns() and added BUG_ON()
just incase.
- Get rid of all individual unshare_*_ns() routines and make use of
copy_*_ns() instead.
[akpm@osdl.org: cleanups, warning fix]
[clg@fr.ibm.com: remove dup_namespaces() declaration]
[serue@us.ibm.com: fix CONFIG_IPC_NS=n, clone(CLONE_NEWIPC) retval]
[akpm@linux-foundation.org: fix build with CONFIG_SYSVIPC=n]
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Cc: Cedric Le Goater <clg@fr.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: <containers@lists.osdl.org>
Signed-off-by: Cedric Le Goater <clg@fr.ibm.com>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/utsname.h')
-rw-r--r-- | include/linux/utsname.h | 19 |
1 files changed, 4 insertions, 15 deletions
diff --git a/include/linux/utsname.h b/include/linux/utsname.h index e10267d..f8d3b32 100644 --- a/include/linux/utsname.h +++ b/include/linux/utsname.h @@ -49,9 +49,7 @@ static inline void get_uts_ns(struct uts_namespace *ns) } #ifdef CONFIG_UTS_NS -extern int unshare_utsname(unsigned long unshare_flags, - struct uts_namespace **new_uts); -extern int copy_utsname(int flags, struct task_struct *tsk); +extern struct uts_namespace *copy_utsname(int flags, struct uts_namespace *ns); extern void free_uts_ns(struct kref *kref); static inline void put_uts_ns(struct uts_namespace *ns) @@ -59,21 +57,12 @@ static inline void put_uts_ns(struct uts_namespace *ns) kref_put(&ns->kref, free_uts_ns); } #else -static inline int unshare_utsname(unsigned long unshare_flags, - struct uts_namespace **new_uts) +static inline struct uts_namespace *copy_utsname(int flags, + struct uts_namespace *ns) { - if (unshare_flags & CLONE_NEWUTS) - return -EINVAL; - - return 0; + return ns; } -static inline int copy_utsname(int flags, struct task_struct *tsk) -{ - if (flags & CLONE_NEWUTS) - return -EINVAL; - return 0; -} static inline void put_uts_ns(struct uts_namespace *ns) { } |