[PATCH v4 04/16] fsnotify: Reserve mark bits for backends
From: Gabriel Krisman Bertazi <hidden>
Date: 2021-07-20 16:12:05
Also in:
linux-fsdevel
Subsystem:
fsnotify: filesystem notification infrastructure, the rest · Maintainers:
Jan Kara, Linus Torvalds
Split out the final bits of struct fsnotify_mark->flags for use by a backend. Signed-off-by: Gabriel Krisman Bertazi <redacted> --- include/linux/fsnotify_backend.h | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-)
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 1ce66748a2d2..9d5586445c65 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h@@ -363,6 +363,21 @@ struct fsnotify_mark_connector { struct hlist_head list; }; +#define FSNOTIFY_MARK_FLAG(flag) \ +static const unsigned int FSNOTIFY_MARK_FLAG_##flag = \ + (1 << FSN_MARK_FL_BIT_##flag) + +enum fsnotify_mark_bits { + FSN_MARK_FL_BIT_IGNORED_SURV_MODIFY, + FSN_MARK_FL_BIT_ALIVE, + FSN_MARK_FL_BIT_ATTACHED, + FSN_MARK_PRIVATE_FLAGS, +}; + +FSNOTIFY_MARK_FLAG(IGNORED_SURV_MODIFY); +FSNOTIFY_MARK_FLAG(ALIVE); +FSNOTIFY_MARK_FLAG(ATTACHED); + /* * A mark is simply an object attached to an in core inode which allows an * fsnotify listener to indicate they are either no longer interested in events
@@ -398,9 +413,7 @@ struct fsnotify_mark { struct fsnotify_mark_connector *connector; /* Events types to ignore [mark->lock, group->mark_mutex] */ __u32 ignored_mask; -#define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x01 -#define FSNOTIFY_MARK_FLAG_ALIVE 0x02 -#define FSNOTIFY_MARK_FLAG_ATTACHED 0x04 + /* Upper bits [31:PRIVATE_FLAGS] are reserved for backend usage */ unsigned int flags; /* flags [mark->lock] */ };
--
2.32.0