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uts: create "struct uts_namespace" from kmem_cache

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So "struct uts_namespace" can enjoy fine-grained SLAB debugging and
usercopy protection.

I'd prefer shorter name "utsns" but there is "user_namespace" already.

Link: http://lkml.kernel.org/r/20180228215158.GA23146@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Serge Hallyn <serge@hallyn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2018-04-10 16:32:36 -07:00 • committed by Linus Torvalds
parent bc4f2f5469
commit 3ea056c504
3 changed files with 24 additions and 4 deletions
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6
include/linux/utsname.h
View file

@ -44,6 +44,8 @@ static inline void put_uts_ns(struct uts_namespace *ns)
{
kref_put(&ns->kref, free_uts_ns);
}
void uts_ns_init(void);
#else
static inline void get_uts_ns(struct uts_namespace *ns)
{
@ -61,6 +63,10 @@ static inline struct uts_namespace *copy_utsname(unsigned long flags,
return old_ns;
}
static inline void uts_ns_init(void)
{
}
#endif
#ifdef CONFIG_PROC_SYSCTL