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-rw-r--r--include/linux/fs.h1
-rw-r--r--include/linux/ipc_namespace.h3
-rw-r--r--include/linux/namei.h25
-rw-r--r--include/linux/ns_common.h12
-rw-r--r--include/linux/pid_namespace.h3
-rw-r--r--include/linux/proc_ns.h43
-rw-r--r--include/linux/user_namespace.h3
-rw-r--r--include/linux/utsname.h3
-rw-r--r--include/net/net_namespace.h3
-rw-r--r--include/uapi/linux/magic.h1
10 files changed, 49 insertions, 48 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index eeaccd37184f..f90c0282c114 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2176,7 +2176,6 @@ static inline int sb_is_blkdev_sb(struct super_block *sb)
extern int sync_filesystem(struct super_block *);
extern const struct file_operations def_blk_fops;
extern const struct file_operations def_chr_fops;
-extern const struct file_operations bad_sock_fops;
#ifdef CONFIG_BLOCK
extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
extern int blkdev_ioctl(struct block_device *, fmode_t, unsigned, unsigned long);
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index e365d5ec69cb..1eee6bcfcf76 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -6,6 +6,7 @@
#include <linux/rwsem.h>
#include <linux/notifier.h>
#include <linux/nsproxy.h>
+#include <linux/ns_common.h>
struct user_namespace;
@@ -58,7 +59,7 @@ struct ipc_namespace {
/* user_ns which owns the ipc ns */
struct user_namespace *user_ns;
- unsigned int proc_inum;
+ struct ns_common ns;
};
extern struct ipc_namespace init_ipc_ns;
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 492de72560fa..c8990779f0c3 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -7,21 +7,10 @@
#include <linux/path.h>
struct vfsmount;
+struct nameidata;
enum { MAX_NESTED_LINKS = 8 };
-struct nameidata {
- struct path path;
- struct qstr last;
- struct path root;
- struct inode *inode; /* path.dentry.d_inode */
- unsigned int flags;
- unsigned seq, m_seq;
- int last_type;
- unsigned depth;
- char *saved_names[MAX_NESTED_LINKS + 1];
-};
-
/*
* Type of the last component on LOOKUP_PARENT
*/
@@ -82,16 +71,8 @@ extern struct dentry *lock_rename(struct dentry *, struct dentry *);
extern void unlock_rename(struct dentry *, struct dentry *);
extern void nd_jump_link(struct nameidata *nd, struct path *path);
-
-static inline void nd_set_link(struct nameidata *nd, char *path)
-{
- nd->saved_names[nd->depth] = path;
-}
-
-static inline char *nd_get_link(struct nameidata *nd)
-{
- return nd->saved_names[nd->depth];
-}
+extern void nd_set_link(struct nameidata *nd, char *path);
+extern char *nd_get_link(struct nameidata *nd);
static inline void nd_terminate_link(void *name, size_t len, size_t maxlen)
{
diff --git a/include/linux/ns_common.h b/include/linux/ns_common.h
new file mode 100644
index 000000000000..85a5c8c16be9
--- /dev/null
+++ b/include/linux/ns_common.h
@@ -0,0 +1,12 @@
+#ifndef _LINUX_NS_COMMON_H
+#define _LINUX_NS_COMMON_H
+
+struct proc_ns_operations;
+
+struct ns_common {
+ atomic_long_t stashed;
+ const struct proc_ns_operations *ops;
+ unsigned int inum;
+};
+
+#endif
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h
index 1997ffc295a7..b9cf6c51b181 100644
--- a/include/linux/pid_namespace.h
+++ b/include/linux/pid_namespace.h
@@ -8,6 +8,7 @@
#include <linux/threads.h>
#include <linux/nsproxy.h>
#include <linux/kref.h>
+#include <linux/ns_common.h>
struct pidmap {
atomic_t nr_free;
@@ -43,7 +44,7 @@ struct pid_namespace {
kgid_t pid_gid;
int hide_pid;
int reboot; /* group exit code if this pidns was rebooted */
- unsigned int proc_inum;
+ struct ns_common ns;
};
extern struct pid_namespace init_pid_ns;
diff --git a/include/linux/proc_ns.h b/include/linux/proc_ns.h
index 34a1e105bef4..42dfc615dbf8 100644
--- a/include/linux/proc_ns.h
+++ b/include/linux/proc_ns.h
@@ -4,21 +4,18 @@
#ifndef _LINUX_PROC_NS_H
#define _LINUX_PROC_NS_H
+#include <linux/ns_common.h>
+
struct pid_namespace;
struct nsproxy;
+struct path;
struct proc_ns_operations {
const char *name;
int type;
- void *(*get)(struct task_struct *task);
- void (*put)(void *ns);
- int (*install)(struct nsproxy *nsproxy, void *ns);
- unsigned int (*inum)(void *ns);
-};
-
-struct proc_ns {
- void *ns;
- const struct proc_ns_operations *ns_ops;
+ struct ns_common *(*get)(struct task_struct *task);
+ void (*put)(struct ns_common *ns);
+ int (*install)(struct nsproxy *nsproxy, struct ns_common *ns);
};
extern const struct proc_ns_operations netns_operations;
@@ -43,32 +40,38 @@ enum {
extern int pid_ns_prepare_proc(struct pid_namespace *ns);
extern void pid_ns_release_proc(struct pid_namespace *ns);
-extern struct file *proc_ns_fget(int fd);
-extern struct proc_ns *get_proc_ns(struct inode *);
extern int proc_alloc_inum(unsigned int *pino);
extern void proc_free_inum(unsigned int inum);
-extern bool proc_ns_inode(struct inode *inode);
#else /* CONFIG_PROC_FS */
static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; }
static inline void pid_ns_release_proc(struct pid_namespace *ns) {}
-static inline struct file *proc_ns_fget(int fd)
-{
- return ERR_PTR(-EINVAL);
-}
-
-static inline struct proc_ns *get_proc_ns(struct inode *inode) { return NULL; }
-
static inline int proc_alloc_inum(unsigned int *inum)
{
*inum = 1;
return 0;
}
static inline void proc_free_inum(unsigned int inum) {}
-static inline bool proc_ns_inode(struct inode *inode) { return false; }
#endif /* CONFIG_PROC_FS */
+static inline int ns_alloc_inum(struct ns_common *ns)
+{
+ atomic_long_set(&ns->stashed, 0);
+ return proc_alloc_inum(&ns->inum);
+}
+
+#define ns_free_inum(ns) proc_free_inum((ns)->inum)
+
+extern struct file *proc_ns_fget(int fd);
+#define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private)
+extern void *ns_get_path(struct path *path, struct task_struct *task,
+ const struct proc_ns_operations *ns_ops);
+
+extern int ns_get_name(char *buf, size_t size, struct task_struct *task,
+ const struct proc_ns_operations *ns_ops);
+extern void nsfs_init(void);
+
#endif /* _LINUX_PROC_NS_H */
diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index e95372654f09..4cf06c140e21 100644
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -3,6 +3,7 @@
#include <linux/kref.h>
#include <linux/nsproxy.h>
+#include <linux/ns_common.h>
#include <linux/sched.h>
#include <linux/err.h>
@@ -26,7 +27,7 @@ struct user_namespace {
int level;
kuid_t owner;
kgid_t group;
- unsigned int proc_inum;
+ struct ns_common ns;
/* Register of per-UID persistent keyrings for this namespace */
#ifdef CONFIG_PERSISTENT_KEYRINGS
diff --git a/include/linux/utsname.h b/include/linux/utsname.h
index 239e27733d6c..5093f58ae192 100644
--- a/include/linux/utsname.h
+++ b/include/linux/utsname.h
@@ -5,6 +5,7 @@
#include <linux/sched.h>
#include <linux/kref.h>
#include <linux/nsproxy.h>
+#include <linux/ns_common.h>
#include <linux/err.h>
#include <uapi/linux/utsname.h>
@@ -23,7 +24,7 @@ struct uts_namespace {
struct kref kref;
struct new_utsname name;
struct user_namespace *user_ns;
- unsigned int proc_inum;
+ struct ns_common ns;
};
extern struct uts_namespace init_uts_ns;
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h
index e0d64667a4b3..2e8756b8c775 100644
--- a/include/net/net_namespace.h
+++ b/include/net/net_namespace.h
@@ -26,6 +26,7 @@
#endif
#include <net/netns/nftables.h>
#include <net/netns/xfrm.h>
+#include <linux/ns_common.h>
struct user_namespace;
struct proc_dir_entry;
@@ -60,7 +61,7 @@ struct net {
struct user_namespace *user_ns; /* Owning user namespace */
- unsigned int proc_inum;
+ struct ns_common ns;
struct proc_dir_entry *proc_net;
struct proc_dir_entry *proc_net_stat;
diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
index 77c60311a6c6..7d664ea85ebd 100644
--- a/include/uapi/linux/magic.h
+++ b/include/uapi/linux/magic.h
@@ -72,5 +72,6 @@
#define MTD_INODE_FS_MAGIC 0x11307854
#define ANON_INODE_FS_MAGIC 0x09041934
#define BTRFS_TEST_MAGIC 0x73727279
+#define NSFS_MAGIC 0x6e736673
#endif /* __LINUX_MAGIC_H__ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 07:08:50 +0000