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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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12
fs/notify/fanotify/fanotify_user.c
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@@ -514,9 +514,10 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags,
if (flags & ~FAN_ALL_MARK_FLAGS)
return -EINVAL;
switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE)) {
switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) {
case FAN_MARK_ADD:
case FAN_MARK_REMOVE:
case FAN_MARK_FLUSH:
break;
default:
return -EINVAL;
@@ -545,7 +546,7 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags,
group = filp->private_data;
/* create/update an inode mark */
switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE)) {
switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) {
case FAN_MARK_ADD:
if (flags & FAN_MARK_MOUNT)
ret = fanotify_add_vfsmount_mark(group, mnt, mask, flags);
@@ -558,6 +559,13 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags,
else
ret = fanotify_remove_inode_mark(group, inode, mask, flags);
break;
case FAN_MARK_FLUSH:
if (flags & FAN_MARK_MOUNT)
fsnotify_clear_vfsmount_marks_by_group(group);
else
fsnotify_clear_inode_marks_by_group(group);
fsnotify_recalc_group_mask(group);
break;
default:
ret = -EINVAL;
}