diff options
Diffstat (limited to 'freebsd/sys/sys/mount.h')
| -rw-r--r-- | freebsd/sys/sys/mount.h | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/freebsd/sys/sys/mount.h b/freebsd/sys/sys/mount.h index edc66f05..dabb506d 100644 --- a/freebsd/sys/sys/mount.h +++ b/freebsd/sys/sys/mount.h @@ -368,23 +368,20 @@ void __mnt_vnode_markerfree_active(struct vnode **mvp, struct mount *); /* * Internal filesystem control flags stored in mnt_kern_flag. * - * MNTK_UNMOUNT locks the mount entry so that name lookup cannot proceed - * past the mount point. This keeps the subtree stable during mounts - * and unmounts. + * MNTK_UNMOUNT locks the mount entry so that name lookup cannot + * proceed past the mount point. This keeps the subtree stable during + * mounts and unmounts. When non-forced unmount flushes all vnodes + * from the mp queue, the MNTK_UNMOUNT flag prevents insmntque() from + * queueing new vnodes. * * MNTK_UNMOUNTF permits filesystems to detect a forced unmount while * dounmount() is still waiting to lock the mountpoint. This allows * the filesystem to cancel operations that might otherwise deadlock * with the unmount attempt (used by NFS). - * - * MNTK_NOINSMNTQ is strict subset of MNTK_UNMOUNT. They are separated - * to allow for failed unmount attempt to restore the syncer vnode for - * the mount. */ #define MNTK_UNMOUNTF 0x00000001 /* forced unmount in progress */ #define MNTK_ASYNC 0x00000002 /* filtered async flag */ #define MNTK_SOFTDEP 0x00000004 /* async disabled by softdep */ -#define MNTK_NOINSMNTQ 0x00000008 /* insmntque is not allowed */ #define MNTK_DRAINING 0x00000010 /* lock draining is happening */ #define MNTK_REFEXPIRE 0x00000020 /* refcount expiring is happening */ #define MNTK_EXTENDED_SHARED 0x00000040 /* Allow shared locking for more ops */ |