Commit | Line | Data |
---|---|---|
b2dba1af | 1 | #include <linux/mount.h> |
0226f492 AV |
2 | #include <linux/seq_file.h> |
3 | #include <linux/poll.h> | |
4 | ||
5 | struct mnt_namespace { | |
6 | atomic_t count; | |
98f842e6 | 7 | unsigned int proc_inum; |
be08d6d2 | 8 | struct mount * root; |
0226f492 | 9 | struct list_head list; |
771b1371 | 10 | struct user_namespace *user_ns; |
8823c079 | 11 | u64 seq; /* Sequence number to prevent loops */ |
0226f492 AV |
12 | wait_queue_head_t poll; |
13 | int event; | |
14 | }; | |
b2dba1af | 15 | |
68e8a9fe AV |
16 | struct mnt_pcp { |
17 | int mnt_count; | |
18 | int mnt_writers; | |
19 | }; | |
20 | ||
7d6fec45 | 21 | struct mount { |
1b8e5564 | 22 | struct list_head mnt_hash; |
0714a533 | 23 | struct mount *mnt_parent; |
a73324da | 24 | struct dentry *mnt_mountpoint; |
7d6fec45 | 25 | struct vfsmount mnt; |
68e8a9fe AV |
26 | #ifdef CONFIG_SMP |
27 | struct mnt_pcp __percpu *mnt_pcp; | |
68e8a9fe AV |
28 | #else |
29 | int mnt_count; | |
30 | int mnt_writers; | |
31 | #endif | |
6b41d536 AV |
32 | struct list_head mnt_mounts; /* list of children, anchored here */ |
33 | struct list_head mnt_child; /* and going through their mnt_child */ | |
39f7c4db | 34 | struct list_head mnt_instance; /* mount instance on sb->s_mounts */ |
52ba1621 | 35 | const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */ |
1a4eeaf2 | 36 | struct list_head mnt_list; |
6776db3d AV |
37 | struct list_head mnt_expire; /* link in fs-specific expiry list */ |
38 | struct list_head mnt_share; /* circular list of shared mounts */ | |
39 | struct list_head mnt_slave_list;/* list of slave mounts */ | |
40 | struct list_head mnt_slave; /* slave list entry */ | |
32301920 | 41 | struct mount *mnt_master; /* slave is on master->mnt_slave_list */ |
143c8c91 | 42 | struct mnt_namespace *mnt_ns; /* containing namespace */ |
c63181e6 AV |
43 | #ifdef CONFIG_FSNOTIFY |
44 | struct hlist_head mnt_fsnotify_marks; | |
45 | __u32 mnt_fsnotify_mask; | |
46 | #endif | |
15169fe7 AV |
47 | int mnt_id; /* mount identifier */ |
48 | int mnt_group_id; /* peer group identifier */ | |
863d684f AV |
49 | int mnt_expiry_mark; /* true if marked for expiry */ |
50 | int mnt_pinned; | |
51 | int mnt_ghosts; | |
7d6fec45 AV |
52 | }; |
53 | ||
f7a99c5b AV |
54 | #define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */ |
55 | ||
7d6fec45 AV |
56 | static inline struct mount *real_mount(struct vfsmount *mnt) |
57 | { | |
58 | return container_of(mnt, struct mount, mnt); | |
59 | } | |
60 | ||
676da58d | 61 | static inline int mnt_has_parent(struct mount *mnt) |
b2dba1af | 62 | { |
0714a533 | 63 | return mnt != mnt->mnt_parent; |
b2dba1af | 64 | } |
c7105365 | 65 | |
f7a99c5b AV |
66 | static inline int is_mounted(struct vfsmount *mnt) |
67 | { | |
68 | /* neither detached nor internal? */ | |
69 | return !IS_ERR_OR_NULL(real_mount(mnt)); | |
70 | } | |
71 | ||
c7105365 | 72 | extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int); |
0226f492 AV |
73 | |
74 | static inline void get_mnt_ns(struct mnt_namespace *ns) | |
75 | { | |
76 | atomic_inc(&ns->count); | |
77 | } | |
78 | ||
79 | struct proc_mounts { | |
6ce6e24e | 80 | struct seq_file m; |
0226f492 AV |
81 | struct mnt_namespace *ns; |
82 | struct path root; | |
83 | int (*show)(struct seq_file *, struct vfsmount *); | |
84 | }; | |
85 | ||
6ce6e24e AV |
86 | #define proc_mounts(p) (container_of((p), struct proc_mounts, m)) |
87 | ||
0226f492 | 88 | extern const struct seq_operations mounts_op; |