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Commit 43709a28 authored by Eric Paris's avatar Eric Paris
Browse files

fsnotify: remove group->mask 



group->mask is now useless.  It was originally a shortcut for fsnotify to
save on performance.  These checks are now redundant, so we remove them.

Signed-off-by: default avatarEric Paris <eparis@redhat.com>
parent 03930979

fs/notify/dnotify/dnotify.c

+0 −4
Original line number Diff line number Diff line
@@ -199,8 +199,6 @@ void dnotify_flush(struct file *filp, fl_owner_t id) 
	if (dn_mark->dn == NULL)

		fsnotify_destroy_mark(fsn_mark);



	fsnotify_recalc_group_mask(dnotify_group);



	mutex_unlock(&dnotify_mark_mutex);



	fsnotify_put_mark(fsn_mark);
@@ -385,8 +383,6 @@ int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg) 
	if (destroy)

		fsnotify_destroy_mark(fsn_mark);



	fsnotify_recalc_group_mask(dnotify_group);



	mutex_unlock(&dnotify_mark_mutex);

	fsnotify_put_mark(fsn_mark);

out_err:

fs/notify/fanotify/fanotify_user.c

+5 −18
Original line number Diff line number Diff line
@@ -496,8 +496,6 @@ static int fanotify_remove_vfsmount_mark(struct fsnotify_group *group, 


	removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags);

	fsnotify_put_mark(fsn_mark);

	if (removed & group->mask)

		fsnotify_recalc_group_mask(group);

	if (removed & mnt->mnt_fsnotify_mask)

		fsnotify_recalc_vfsmount_mask(mnt);
@@ -518,9 +516,6 @@ static int fanotify_remove_inode_mark(struct fsnotify_group *group, 
	removed = fanotify_mark_remove_from_mask(fsn_mark, mask, flags);

	/* matches the fsnotify_find_inode_mark() */

	fsnotify_put_mark(fsn_mark);



	if (removed & group->mask)

		fsnotify_recalc_group_mask(group);

	if (removed & inode->i_fsnotify_mask)

		fsnotify_recalc_inode_mask(inode);
@@ -572,12 +567,9 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group, 
	}

	added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);

	fsnotify_put_mark(fsn_mark);

	if (added) {

		if (added & ~group->mask)

			fsnotify_recalc_group_mask(group);

	if (added & ~mnt->mnt_fsnotify_mask)

		fsnotify_recalc_vfsmount_mask(mnt);

	}



	return 0;

}
@@ -607,12 +599,8 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group, 
	}

	added = fanotify_mark_add_to_mask(fsn_mark, mask, flags);

	fsnotify_put_mark(fsn_mark);

	if (added) {

		if (added & ~group->mask)

			fsnotify_recalc_group_mask(group);

	if (added & ~inode->i_fsnotify_mask)

		fsnotify_recalc_inode_mask(inode);

	}

	return 0;

}
@@ -734,7 +722,6 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags, 
			fsnotify_clear_vfsmount_marks_by_group(group);

		else

			fsnotify_clear_inode_marks_by_group(group);

		fsnotify_recalc_group_mask(group);

		break;

	default:

		ret = -EINVAL;

fs/notify/group.c

+0 −16
Original line number Diff line number Diff line
@@ -35,22 +35,6 @@ LIST_HEAD(fsnotify_inode_groups); 
/* all groups registered to receive mount point filesystem notifications */

LIST_HEAD(fsnotify_vfsmount_groups);



/*

 * Update the group->mask by running all of the marks associated with this

 * group and finding the bitwise | of all of the mark->mask.

 */

void fsnotify_recalc_group_mask(struct fsnotify_group *group)

{

	__u32 mask = 0;

	struct fsnotify_mark *mark;



	spin_lock(&group->mark_lock);

	list_for_each_entry(mark, &group->marks_list, g_list)

		mask |= mark->mask;

	group->mask = mask;

	spin_unlock(&group->mark_lock);

}



void fsnotify_add_vfsmount_group(struct fsnotify_group *group)

{

	struct fsnotify_group *group_iter;

fs/notify/inotify/inotify_user.c

+0 −9
Original line number Diff line number Diff line
@@ -606,16 +606,11 @@ static int inotify_update_existing_watch(struct fsnotify_group *group, 
		int dropped = (old_mask & ~new_mask);

		/* more bits in this fsn_mark than the inode's mask? */

		int do_inode = (new_mask & ~inode->i_fsnotify_mask);

		/* more bits in this fsn_mark than the group? */

		int do_group = (new_mask & ~group->mask);



		/* update the inode with this new fsn_mark */

		if (dropped || do_inode)

			fsnotify_recalc_inode_mask(inode);



		/* update the group mask with the new mask */

		if (dropped || do_group)

			fsnotify_recalc_group_mask(group);

	}



	/* return the wd */
@@ -673,10 +668,6 @@ static int inotify_new_watch(struct fsnotify_group *group, 
	/* return the watch descriptor for this new mark */

	ret = tmp_i_mark->wd;



	/* if this mark added a new event update the group mask */

	if (mask & ~group->mask)

		fsnotify_recalc_group_mask(group);



out_err:

	/* match the ref from fsnotify_init_mark() */

	fsnotify_put_mark(&tmp_i_mark->fsn_mark);

include/linux/fsnotify_backend.h

+0 −11
Original line number Diff line number Diff line
@@ -119,15 +119,6 @@ struct fsnotify_group { 
	 */

	struct list_head vfsmount_group_list;



	/*

	 * Defines all of the event types in which this group is interested.

	 * This mask is a bitwise OR of the FS_* events from above.  Each time

	 * this mask changes for a group (if it changes) the correct functions

	 * must be called to update the global structures which indicate global

	 * interest in event types.

	 */

	__u32 mask;



	/*

	 * How the refcnt is used is up to each group.  When the refcnt hits 0

	 * fsnotify will clean up all of the resources associated with this group.
@@ -367,8 +358,6 @@ static inline void __fsnotify_d_instantiate(struct dentry *dentry, struct inode 


/* get a reference to an existing or create a new group */

extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops);

/* run all marks associated with this group and update group->mask */

extern void fsnotify_recalc_group_mask(struct fsnotify_group *group);

/* drop reference on a group from fsnotify_alloc_group */

extern void fsnotify_put_group(struct fsnotify_group *group);