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fanotify: clear all fanotify marks

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fanotify listeners may want to clear all marks.  They may want to do this
to destroy all of their inode marks which have nothing but ignores.
Realistically this is useful for av vendors who update policy and want to
clear all of their cached allows.

Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Eric Paris
2009-12-17 21:24:34 -05:00
parent c9778a98e7
commit 4d92604cc9
6 changed files with 46 additions and 7 deletions
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21
fs/notify/mark.c
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@ -270,18 +270,21 @@ err:
}
/*
* Given a group, destroy all of the marks associated with that group.
* clear any marks in a group in which mark->flags & flags is true
*/
void fsnotify_clear_marks_by_group(struct fsnotify_group *group)
void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group,
unsigned int flags)
{
struct fsnotify_mark *lmark, *mark;
LIST_HEAD(free_list);
spin_lock(&group->mark_lock);
list_for_each_entry_safe(mark, lmark, &group->marks_list, g_list) {
list_add(&mark->free_g_list, &free_list);
list_del_init(&mark->g_list);
fsnotify_get_mark(mark);
if (mark->flags & flags) {
list_add(&mark->free_g_list, &free_list);
list_del_init(&mark->g_list);
fsnotify_get_mark(mark);
}
}
spin_unlock(&group->mark_lock);
@ -291,6 +294,14 @@ void fsnotify_clear_marks_by_group(struct fsnotify_group *group)
}
}
/*
* Given a group, destroy all of the marks associated with that group.
*/
void fsnotify_clear_marks_by_group(struct fsnotify_group *group)
{
fsnotify_clear_marks_by_group_flags(group, (unsigned int)-1);
}
void fsnotify_duplicate_mark(struct fsnotify_mark *new, struct fsnotify_mark *old)
{
assert_spin_locked(&old->lock);