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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-04 08:15:33 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-04 08:15:33 -0800
commit0f2cc4ecd81dc1917a041dc93db0ada28f8356fa (patch)
treef128b50f48f50f0cda6d2b20b53e9ad6e2dfded3 /include/linux/mount.h
parent1fae4cfb97302289bb5df6a8195eb28385d0b002 (diff)
parent9643f5d94aadd47a5fa9754fb60f2c957de05903 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (52 commits) init: Open /dev/console from rootfs mqueue: fix typo "failues" -> "failures" mqueue: only set error codes if they are really necessary mqueue: simplify do_open() error handling mqueue: apply mathematics distributivity on mq_bytes calculation mqueue: remove unneeded info->messages initialization mqueue: fix mq_open() file descriptor leak on user-space processes fix race in d_splice_alias() set S_DEAD on unlink() and non-directory rename() victims vfs: add NOFOLLOW flag to umount(2) get rid of ->mnt_parent in tomoyo/realpath hppfs can use existing proc_mnt, no need for do_kern_mount() in there Mirror MS_KERNMOUNT in ->mnt_flags get rid of useless vfsmount_lock use in put_mnt_ns() Take vfsmount_lock to fs/internal.h get rid of insanity with namespace roots in tomoyo take check for new events in namespace (guts of mounts_poll()) to namespace.c Don't mess with generic_permission() under ->d_lock in hpfs sanitize const/signedness for udf nilfs: sanitize const/signedness in dealing with ->d_name.name ... Fix up fairly trivial (famous last words...) conflicts in drivers/infiniband/core/uverbs_main.c and security/tomoyo/realpath.c
Diffstat (limited to 'include/linux/mount.h')
-rw-r--r--include/linux/mount.h14
1 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/mount.h b/include/linux/mount.h
index b5f43a34ef8..4bd05474d11 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -34,7 +34,18 @@ struct mnt_namespace;
#define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */
#define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */
-#define MNT_PNODE_MASK 0x3000 /* propagation flag mask */
+/*
+ * MNT_SHARED_MASK is the set of flags that should be cleared when a
+ * mount becomes shared. Currently, this is only the flag that says a
+ * mount cannot be bind mounted, since this is how we create a mount
+ * that shares events with another mount. If you add a new MNT_*
+ * flag, consider how it interacts with shared mounts.
+ */
+#define MNT_SHARED_MASK (MNT_UNBINDABLE)
+#define MNT_PROPAGATION_MASK (MNT_SHARED | MNT_UNBINDABLE)
+
+
+#define MNT_INTERNAL 0x4000
struct vfsmount {
struct list_head mnt_hash;
@@ -123,7 +134,6 @@ extern int do_add_mount(struct vfsmount *newmnt, struct path *path,
extern void mark_mounts_for_expiry(struct list_head *mounts);
-extern spinlock_t vfsmount_lock;
extern dev_t name_to_dev_t(char *name);
#endif /* _LINUX_MOUNT_H */