| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | #include <linux/mount.h> |
| 2 | #include <linux/seq_file.h> |
| 3 | #include <linux/poll.h> |
| 4 | |
| 5 | struct 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 | |
| 13 | struct mnt_pcp { |
| 14 | int mnt_count; |
| 15 | int mnt_writers; |
| 16 | }; |
| 17 | |
| 18 | struct 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 | atomic_t mnt_longterm; /* how many of the refs are longterm */ |
| 26 | #else |
| 27 | int mnt_count; |
| 28 | int mnt_writers; |
| 29 | #endif |
| 30 | struct list_head mnt_mounts; /* list of children, anchored here */ |
| 31 | struct list_head mnt_child; /* and going through their mnt_child */ |
| 32 | struct list_head mnt_instance; /* mount instance on sb->s_mounts */ |
| 33 | const char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */ |
| 34 | struct list_head mnt_list; |
| 35 | struct list_head mnt_expire; /* link in fs-specific expiry list */ |
| 36 | struct list_head mnt_share; /* circular list of shared mounts */ |
| 37 | struct list_head mnt_slave_list;/* list of slave mounts */ |
| 38 | struct list_head mnt_slave; /* slave list entry */ |
| 39 | struct mount *mnt_master; /* slave is on master->mnt_slave_list */ |
| 40 | struct mnt_namespace *mnt_ns; /* containing namespace */ |
| 41 | #ifdef CONFIG_FSNOTIFY |
| 42 | struct hlist_head mnt_fsnotify_marks; |
| 43 | __u32 mnt_fsnotify_mask; |
| 44 | #endif |
| 45 | int mnt_id; /* mount identifier */ |
| 46 | int mnt_group_id; /* peer group identifier */ |
| 47 | int mnt_expiry_mark; /* true if marked for expiry */ |
| 48 | int mnt_pinned; |
| 49 | int mnt_ghosts; |
| 50 | }; |
| 51 | |
| 52 | static inline struct mount *real_mount(struct vfsmount *mnt) |
| 53 | { |
| 54 | return container_of(mnt, struct mount, mnt); |
| 55 | } |
| 56 | |
| 57 | static inline int mnt_has_parent(struct mount *mnt) |
| 58 | { |
| 59 | return mnt != mnt->mnt_parent; |
| 60 | } |
| 61 | |
| 62 | extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int); |
| 63 | |
| 64 | static inline void get_mnt_ns(struct mnt_namespace *ns) |
| 65 | { |
| 66 | atomic_inc(&ns->count); |
| 67 | } |
| 68 | |
| 69 | struct proc_mounts { |
| 70 | struct seq_file m; /* must be the first element */ |
| 71 | struct mnt_namespace *ns; |
| 72 | struct path root; |
| 73 | int (*show)(struct seq_file *, struct vfsmount *); |
| 74 | }; |
| 75 | |
| 76 | extern const struct seq_operations mounts_op; |