fsnotify: ignored_mask - excluding notification
The ignored_mask is a new mask which is part of fsnotify marks. A group's should_send_event() function can use the ignored mask to determine that certain events are not of interest. In particular if a group registers a mask including FS_OPEN on a vfsmount they could add FS_OPEN to the ignored_mask for individual inodes and not send open events for those inodes. Signed-off-by: Eric Paris <eparis@redhat.com>
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90b1e7a578
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@ -190,6 +190,12 @@ void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask)
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fsnotify_set_inode_mark_mask_locked(mark, mask);
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}
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void fsnotify_set_mark_ignored_mask_locked(struct fsnotify_mark *mark, __u32 mask)
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{
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assert_spin_locked(&mark->lock);
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mark->ignored_mask = mask;
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}
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/*
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* Attach an initialized mark to a given group and fs object.
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@ -266,6 +266,7 @@ struct fsnotify_mark {
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struct fsnotify_inode_mark i;
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struct fsnotify_vfsmount_mark m;
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};
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__u32 ignored_mask; /* events types to ignore */
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struct list_head free_g_list; /* tmp list used when freeing this mark */
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#define FSNOTIFY_MARK_FLAG_INODE 0x01
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#define FSNOTIFY_MARK_FLAG_VFSMOUNT 0x02
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@ -373,6 +374,8 @@ extern struct fsnotify_mark *fsnotify_find_inode_mark(struct fsnotify_group *gro
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extern struct fsnotify_mark *fsnotify_find_vfsmount_mark(struct fsnotify_group *group, struct vfsmount *mnt);
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/* copy the values from old into new */
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extern void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *old);
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/* set the ignored_mask of a mark */
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extern void fsnotify_set_mark_ignored_mask_locked(struct fsnotify_mark *mark, __u32 mask);
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/* set the mask of a mark (might pin the object into memory */
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extern void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask);
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/* attach the mark to both the group and the inode */
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