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| author | Eric W. Biederman <ebiederm@xmission.com> | 2011-03-24 02:43:13 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-24 05:46:58 +0300 |
| commit | 4308eebbeb2026827d4492ce8c23d99f7f144a82 (patch) | |
| tree | 3781e227988b4d986bf98dcc0390df17c6fe8f10 /kernel | |
| parent | 45a68628d37222e655219febce9e91b6484789b2 (diff) | |
| download | linux-4308eebbeb2026827d4492ce8c23d99f7f144a82.tar.xz | |
pidns: call pid_ns_prepare_proc() from create_pid_namespace()
Reorganize proc_get_sb() so it can be called before the struct pid of the
first process is allocated.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@free.fr>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Serge E. Hallyn <serge@hallyn.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/fork.c | 6 | ||||
| -rw-r--r-- | kernel/pid_namespace.c | 11 |
2 files changed, 9 insertions, 8 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 17aed4378eda..457fff2e17e0 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1187,12 +1187,6 @@ static struct task_struct *copy_process(unsigned long clone_flags, pid = alloc_pid(p->nsproxy->pid_ns); if (!pid) goto bad_fork_cleanup_io; - - if (clone_flags & CLONE_NEWPID) { - retval = pid_ns_prepare_proc(p->nsproxy->pid_ns); - if (retval < 0) - goto bad_fork_free_pid; - } } p->pid = pid_nr(pid); diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index a5aff94e1f0b..e9c9adc84ca6 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -14,6 +14,7 @@ #include <linux/err.h> #include <linux/acct.h> #include <linux/slab.h> +#include <linux/proc_fs.h> #define BITS_PER_PAGE (PAGE_SIZE*8) @@ -72,7 +73,7 @@ static struct pid_namespace *create_pid_namespace(struct pid_namespace *parent_p { struct pid_namespace *ns; unsigned int level = parent_pid_ns->level + 1; - int i; + int i, err = -ENOMEM; ns = kmem_cache_zalloc(pid_ns_cachep, GFP_KERNEL); if (ns == NULL) @@ -96,14 +97,20 @@ static struct pid_namespace *create_pid_namespace(struct pid_namespace *parent_p for (i = 1; i < PIDMAP_ENTRIES; i++) atomic_set(&ns->pidmap[i].nr_free, BITS_PER_PAGE); + err = pid_ns_prepare_proc(ns); + if (err) + goto out_put_parent_pid_ns; + return ns; +out_put_parent_pid_ns: + put_pid_ns(parent_pid_ns); out_free_map: kfree(ns->pidmap[0].page); out_free: kmem_cache_free(pid_ns_cachep, ns); out: - return ERR_PTR(-ENOMEM); + return ERR_PTR(err); } static void destroy_pid_namespace(struct pid_namespace *ns) |