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Commit c908370f authored by Eric Paris's avatar Eric Paris
Browse files

fsnotify: allow ignored_mask to survive modification 



Some inodes a group may want to never hear about a set of events even if
the inode is modified.  We add a new mark flag which indicates that these
marks should not have their ignored_mask cleared on modification.

Signed-off-by: default avatarEric Paris <eparis@redhat.com>
parent e8983861

fs/notify/fsnotify.c

+4 −2
Original line number Diff line number Diff line
@@ -148,6 +148,7 @@ void __fsnotify_flush_ignored_mask(struct inode *inode, void *data, int data_is) 
	if (!hlist_empty(&inode->i_fsnotify_marks)) {

		spin_lock(&inode->i_lock);

		hlist_for_each_entry(mark, node, &inode->i_fsnotify_marks, i.i_list) {

			if (!(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))

				mark->ignored_mask = 0;

		}

		spin_unlock(&inode->i_lock);
@@ -160,6 +161,7 @@ void __fsnotify_flush_ignored_mask(struct inode *inode, void *data, int data_is) 
		if (mnt && !hlist_empty(&mnt->mnt_fsnotify_marks)) {

			spin_lock(&mnt->mnt_root->d_lock);

			hlist_for_each_entry(mark, node, &mnt->mnt_fsnotify_marks, m.m_list) {

				if (!(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))

					mark->ignored_mask = 0;

			}

			spin_unlock(&mnt->mnt_root->d_lock);

include/linux/fsnotify_backend.h

+1 −0
Original line number Diff line number Diff line
@@ -271,6 +271,7 @@ struct fsnotify_mark { 
#define FSNOTIFY_MARK_FLAG_INODE		0x01

#define FSNOTIFY_MARK_FLAG_VFSMOUNT		0x02

#define FSNOTIFY_MARK_FLAG_OBJECT_PINNED	0x04

#define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY	0x08

	unsigned int flags;		/* vfsmount or inode mark? */

	void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */

};