[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / fs / mount.h

#include <linux/mount.h>
#include <linux/seq_file.h>
#include <linux/poll.h>

struct mnt_namespace {
	atomic_t		count;
	struct mount *	root;
	struct list_head	list;
	u64			seq;	/* Sequence number to prevent loops */
	wait_queue_head_t poll;
	int event;
};

struct mnt_pcp {
	int mnt_count;
	int mnt_writers;
};

struct mount {
	struct list_head mnt_hash;
	struct mount *mnt_parent;
	struct dentry *mnt_mountpoint;
	struct vfsmount mnt;
#ifdef CONFIG_SMP
	struct mnt_pcp __percpu *mnt_pcp;
#else
	int mnt_count;
	int mnt_writers;
#endif
	struct list_head mnt_mounts;	/* list of children, anchored here */
	struct list_head mnt_child;	/* and going through their mnt_child */
	struct list_head mnt_instance;	/* mount instance on sb->s_mounts */
	const char *mnt_devname;	/* Name of device e.g. /dev/dsk/hda1 */
	struct list_head mnt_list;
	struct list_head mnt_expire;	/* link in fs-specific expiry list */
	struct list_head mnt_share;	/* circular list of shared mounts */
	struct list_head mnt_slave_list;/* list of slave mounts */
	struct list_head mnt_slave;	/* slave list entry */
	struct mount *mnt_master;	/* slave is on master->mnt_slave_list */
	struct mnt_namespace *mnt_ns;	/* containing namespace */
#ifdef CONFIG_FSNOTIFY
	struct hlist_head mnt_fsnotify_marks;
	__u32 mnt_fsnotify_mask;
#endif
	int mnt_id;			/* mount identifier */
	int mnt_group_id;		/* peer group identifier */
	int mnt_expiry_mark;		/* true if marked for expiry */
	int mnt_pinned;
	int mnt_ghosts;
};

#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */

static inline struct mount *real_mount(struct vfsmount *mnt)
{
	return container_of(mnt, struct mount, mnt);
}

static inline int mnt_has_parent(struct mount *mnt)
{
	return mnt != mnt->mnt_parent;
}

static inline int is_mounted(struct vfsmount *mnt)
{
	/* neither detached nor internal? */
	return !IS_ERR_OR_NULL(real_mount(mnt));
}

extern struct mount *__lookup_mnt(struct vfsmount *, struct dentry *, int);

static inline void get_mnt_ns(struct mnt_namespace *ns)
{
	atomic_inc(&ns->count);
}

struct proc_mounts {
	struct seq_file m;
	struct mnt_namespace *ns;
	struct path root;
	int (*show)(struct seq_file *, struct vfsmount *);
};

#define proc_mounts(p) (container_of((p), struct proc_mounts, m))

extern const struct seq_operations mounts_op;
Commit	Line	Data
	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	u64 seq; /* Sequence number to prevent loops */
	10	wait_queue_head_t poll;
	11	int event;
	12	};
	13
	14	struct mnt_pcp {
	15	int mnt_count;
	16	int mnt_writers;
	17	};
	18
	19	struct mount {
	20	struct list_head mnt_hash;
	21	struct mount *mnt_parent;
	22	struct dentry *mnt_mountpoint;
	23	struct vfsmount mnt;
	24	#ifdef CONFIG_SMP
	25	struct mnt_pcp __percpu *mnt_pcp;
	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	#define MNT_NS_INTERNAL ERR_PTR(-EINVAL) /* distinct from any mnt_namespace */
	53
	54	static inline struct mount real_mount(struct vfsmount mnt)
	55	{
	56	return container_of(mnt, struct mount, mnt);
	57	}
	58
	59	static inline int mnt_has_parent(struct mount *mnt)
	60	{
	61	return mnt != mnt->mnt_parent;
	62	}
	63
	64	static inline int is_mounted(struct vfsmount *mnt)
	65	{
	66	/* neither detached nor internal? */
	67	return !IS_ERR_OR_NULL(real_mount(mnt));
	68	}
	69
	70	extern struct mount __lookup_mnt(struct vfsmount , struct dentry *, int);
	71
	72	static inline void get_mnt_ns(struct mnt_namespace *ns)
	73	{
	74	atomic_inc(&ns->count);
	75	}
	76
	77	struct proc_mounts {
	78	struct seq_file m;
	79	struct mnt_namespace *ns;
	80	struct path root;
	81	int (show)(struct seq_file , struct vfsmount *);
	82	};
	83
	84	#define proc_mounts(p) (container_of((p), struct proc_mounts, m))
	85
	86	extern const struct seq_operations mounts_op;