diff options
Diffstat (limited to 'include/linux/mount.h')
| -rw-r--r-- | include/linux/mount.h | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/include/linux/mount.h b/include/linux/mount.h index f8f39937e301..dd4e83eba933 100644 --- a/include/linux/mount.h +++ b/include/linux/mount.h @@ -17,12 +17,14 @@ #include <linux/spinlock.h> #include <asm/atomic.h> -#define MNT_NOSUID 1 -#define MNT_NODEV 2 -#define MNT_NOEXEC 4 +#define MNT_NOSUID 0x01 +#define MNT_NODEV 0x02 +#define MNT_NOEXEC 0x04 +#define MNT_SHARED 0x10 /* if the vfsmount is a shared mount */ +#define MNT_UNBINDABLE 0x20 /* if the vfsmount is a unbindable mount */ +#define MNT_PNODE_MASK 0x30 /* propogation flag mask */ -struct vfsmount -{ +struct vfsmount { struct list_head mnt_hash; struct vfsmount *mnt_parent; /* fs we are mounted on */ struct dentry *mnt_mountpoint; /* dentry of mountpoint */ @@ -36,7 +38,12 @@ struct vfsmount 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 vfsmount *mnt_master; /* slave is on master->mnt_slave_list */ struct namespace *mnt_namespace; /* containing namespace */ + int mnt_pinned; }; static inline struct vfsmount *mntget(struct vfsmount *mnt) @@ -46,15 +53,9 @@ static inline struct vfsmount *mntget(struct vfsmount *mnt) return mnt; } -extern void __mntput(struct vfsmount *mnt); - -static inline void mntput_no_expire(struct vfsmount *mnt) -{ - if (mnt) { - if (atomic_dec_and_test(&mnt->mnt_count)) - __mntput(mnt); - } -} +extern void mntput_no_expire(struct vfsmount *mnt); +extern void mnt_pin(struct vfsmount *mnt); +extern void mnt_unpin(struct vfsmount *mnt); static inline void mntput(struct vfsmount *mnt) { |