Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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linux
1#include <linux/mount.h>
2#include <linux/seq_file.h>
3#include <linux/poll.h>
4
5struct mnt_namespace {
6 atomic_t count;
7 struct mount * root;
8 struct list_head list;
9 wait_queue_head_t poll;
10 int event;
11};
12
13struct mnt_pcp {
14 int mnt_count;
15 int mnt_writers;
16};
17
18struct mount {
19 struct list_head mnt_hash;
20 struct mount *mnt_parent;
21 struct dentry *mnt_mountpoint;
22 struct vfsmount mnt;
23#ifdef CONFIG_SMP
24 struct mnt_pcp __percpu *mnt_pcp;
25#else
26 int mnt_count;
27 int mnt_writers;
28#endif
29 struct list_head mnt_mounts; /* list of children, anchored here */
30 struct list_head mnt_child; /* and going through their mnt_child */
31 struct list_head mnt_instance; /* mount instance on sb->s_mounts */
32 const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */
33 struct list_head mnt_list;
34 struct list_head mnt_expire; /* link in fs-specific expiry list */
35 struct list_head mnt_share; /* circular list of shared mounts */
36 struct list_head mnt_slave_list;/* list of slave mounts */
37 struct list_head mnt_slave; /* slave list entry */
38 struct mount *mnt_master; /* slave is on master->mnt_slave_list */
39 struct mnt_namespace *mnt_ns; /* containing namespace */
40#ifdef CONFIG_FSNOTIFY
41 struct hlist_head mnt_fsnotify_marks;
42 __u32 mnt_fsnotify_mask;
43#endif
44 int mnt_id; /* mount identifier */
45 int mnt_group_id; /* peer group identifier */
46 int mnt_expiry_mark; /* true if marked for expiry */
47 int mnt_pinned;
48 int mnt_ghosts;
49};
50
51#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */
52
53static inline struct mount *real_mount(struct vfsmount *mnt)
54{
55 return container_of(mnt, struct mount, mnt);
56}
57
58static inline int mnt_has_parent(struct mount *mnt)
59{
60 return mnt != mnt->mnt_parent;
61}
62
63static inline int is_mounted(struct vfsmount *mnt)
64{
65 /* neither detached nor internal? */
66 return !IS_ERR_OR_NULL(real_mount(mnt));
67}
68
69extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
70
71static inline void get_mnt_ns(struct mnt_namespace *ns)
72{
73 atomic_inc(&ns->count);
74}
75
76struct proc_mounts {
77 struct seq_file m;
78 struct mnt_namespace *ns;
79 struct path root;
80 int (*show)(struct seq_file *, struct vfsmount *);
81};
82
83#define proc_mounts(p) (container_of((p), struct proc_mounts, m))
84
85extern const struct seq_operations mounts_op;