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gerrit-public.fairphone.software / kernel / msm-4.9 / 7d65f4a6553203da6a22097821d151fbbe7e4956 / . / include / linux / fs_struct.h
blob: 0efc3e62843ae74592128dc7e34bd11fbaca4a3c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1#ifndef _LINUX_FS_STRUCT_H
2#define _LINUX_FS_STRUCT_H
3
Jan Blunck6ac08c32008-02-14 19:34:38 -0800[diff] [blame]4#include <linux/path.h>
Nick Pigginc28cc362011-01-07 17:49:53 +1100[diff] [blame]5#include <linux/spinlock.h>
6#include <linux/seqlock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]7
8struct fs_struct {
Al Viro498052b2009-03-30 07:20:30 -0400[diff] [blame]9 int users;
Nick Piggin2a4419b2010-08-18 04:37:33 +1000[diff] [blame]10 spinlock_t lock;
Nick Pigginc28cc362011-01-07 17:49:53 +1100[diff] [blame]11 seqcount_t seq;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]12 int umask;
Al Viro498052b2009-03-30 07:20:30 -0400[diff] [blame]13 int in_exec;
Al Viro7f2da1e2008-05-10 20:44:54 -0400[diff] [blame]14 struct path root, pwd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]15};
16
Christoph Lameteraa362a82006-12-06 20:32:54 -0800[diff] [blame]17extern struct kmem_cache *fs_cachep;
18
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]19extern void exit_fs(struct task_struct *);
Al Virodcf787f2013-03-01 23:51:07 -0500[diff] [blame]20extern void set_fs_root(struct fs_struct *, const struct path *);
21extern void set_fs_pwd(struct fs_struct *, const struct path *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]22extern struct fs_struct *copy_fs_struct(struct fs_struct *);
Al Viro498052b2009-03-30 07:20:30 -0400[diff] [blame]23extern void free_fs_struct(struct fs_struct *);
Al Viro3e93cd62009-03-29 19:00:13 -0400[diff] [blame]24extern int unshare_fs_struct(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]25
Miklos Szeredif7ad3c62010-08-10 11:41:36 +0200[diff] [blame]26static inline void get_fs_root(struct fs_struct *fs, struct path *root)
27{
Nick Piggin2a4419b2010-08-18 04:37:33 +1000[diff] [blame]28 spin_lock(&fs->lock);
Miklos Szeredif7ad3c62010-08-10 11:41:36 +0200[diff] [blame]29 *root = fs->root;
30 path_get(root);
Nick Piggin2a4419b2010-08-18 04:37:33 +1000[diff] [blame]31 spin_unlock(&fs->lock);
Miklos Szeredif7ad3c62010-08-10 11:41:36 +0200[diff] [blame]32}
33
34static inline void get_fs_pwd(struct fs_struct *fs, struct path *pwd)
35{
Nick Piggin2a4419b2010-08-18 04:37:33 +1000[diff] [blame]36 spin_lock(&fs->lock);
Miklos Szeredif7ad3c62010-08-10 11:41:36 +0200[diff] [blame]37 *pwd = fs->pwd;
38 path_get(pwd);
Nick Piggin2a4419b2010-08-18 04:37:33 +1000[diff] [blame]39 spin_unlock(&fs->lock);
Miklos Szeredif7ad3c62010-08-10 11:41:36 +0200[diff] [blame]40}
41
Eric W. Biederman31515272013-03-15 01:45:51 -0700[diff] [blame]42extern bool current_chrooted(void);
43
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]44#endif /* _LINUX_FS_STRUCT_H */