ich777/linux_media
1
0
Fork 0
mirror of https://github.com/tbsdtv/linux_media.git synced 2025-07-23 12:43:29 +02:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

Browse Source 
Pull vfs pile #2 from Al Viro:
 "Next pile (and there'll be one or two more).

  The large piece in this one is getting rid of /proc/*/ns/* weirdness;
  among other things, it allows to (finally) make nameidata completely
  opaque outside of fs/namei.c, making for easier further cleanups in
  there"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  coda_venus_readdir(): use file_inode()
  fs/namei.c: fold link_path_walk() call into path_init()
  path_init(): don't bother with LOOKUP_PARENT in argument
  fs/namei.c: new helper (path_cleanup())
  path_init(): store the "base" pointer to file in nameidata itself
  make default ->i_fop have ->open() fail with ENXIO
  make nameidata completely opaque outside of fs/namei.c
  kill proc_ns completely
  take the targets of /proc/*/ns/* symlinks to separate fs
  bury struct proc_ns in fs/proc
  copy address of proc_ns_ops into ns_common
  new helpers: ns_alloc_inum/ns_free_inum
  make proc_ns_operations work with struct ns_common * instead of void *
  switch the rest of proc_ns_operations to working with &...->ns
  netns: switch ->get()/->put()/->install()/->inum() to working with &net->ns
  make mntns ->get()/->put()/->install()/->inum() work with &mnt_ns->ns
  common object embedded into various struct ....ns
This commit is contained in:
Linus Torvalds
2014-12-16 15:53:03 -08:00
parent 31f48fc8f2 93fe74b2e2
commit 603ba7e41b
36 changed files with 416 additions and 430 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
kernel/pid_namespace.c
View File

@@ -105,9 +105,10 @@ static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns
if (ns->pid_cachep == NULL)
goto out_free_map;
err = proc_alloc_inum(&ns->proc_inum);
err = ns_alloc_inum(&ns->ns);
if (err)
goto out_free_map;
ns->ns.ops = &pidns_operations;
kref_init(&ns->kref);
ns->level = level;
@@ -142,7 +143,7 @@ static void destroy_pid_namespace(struct pid_namespace *ns)
{
int i;
proc_free_inum(ns->proc_inum);
ns_free_inum(&ns->ns);
for (i = 0; i < PIDMAP_ENTRIES; i++)
kfree(ns->pidmap[i].page);
put_user_ns(ns->user_ns);
@@ -333,7 +334,12 @@ int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
return 0;
}
static void *pidns_get(struct task_struct *task)
static inline struct pid_namespace *to_pid_ns(struct ns_common *ns)
{
return container_of(ns, struct pid_namespace, ns);
}
static struct ns_common *pidns_get(struct task_struct *task)
{
struct pid_namespace *ns;
@@ -343,18 +349,18 @@ static void *pidns_get(struct task_struct *task)
get_pid_ns(ns);
rcu_read_unlock();
return ns;
return ns ? &ns->ns : NULL;
}
static void pidns_put(void *ns)
static void pidns_put(struct ns_common *ns)
{
put_pid_ns(ns);
put_pid_ns(to_pid_ns(ns));
}
static int pidns_install(struct nsproxy *nsproxy, void *ns)
static int pidns_install(struct nsproxy *nsproxy, struct ns_common *ns)
{
struct pid_namespace *active = task_active_pid_ns(current);
struct pid_namespace *ancestor, *new = ns;
struct pid_namespace *ancestor, *new = to_pid_ns(ns);
if (!ns_capable(new->user_ns, CAP_SYS_ADMIN) ||
!ns_capable(current_user_ns(), CAP_SYS_ADMIN))
@@ -382,19 +388,12 @@ static int pidns_install(struct nsproxy *nsproxy, void *ns)
return 0;
}
static unsigned int pidns_inum(void *ns)
{
struct pid_namespace *pid_ns = ns;
return pid_ns->proc_inum;
}
const struct proc_ns_operations pidns_operations = {
.name = "pid",
.type = CLONE_NEWPID,
.get = pidns_get,
.put = pidns_put,
.install = pidns_install,
.inum = pidns_inum,
};
static __init int pid_namespaces_init(void)