fsnotify: pass both the vfsmount mark and inode mark
should_send_event() and handle_event() will both need to look up the inode
event if they get a vfsmount event. Lets just pass both at the same time
since we have them both after walking the lists in lockstep.
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index e92b2c8..bda588b 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -83,7 +83,8 @@
* events.
*/
static int dnotify_handle_event(struct fsnotify_group *group,
- struct fsnotify_mark *mark,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
struct fsnotify_event *event)
{
struct dnotify_mark *dn_mark;
@@ -93,11 +94,13 @@
struct fown_struct *fown;
__u32 test_mask = event->mask & ~FS_EVENT_ON_CHILD;
+ BUG_ON(vfsmount_mark);
+
to_tell = event->to_tell;
- dn_mark = container_of(mark, struct dnotify_mark, fsn_mark);
+ dn_mark = container_of(inode_mark, struct dnotify_mark, fsn_mark);
- spin_lock(&mark->lock);
+ spin_lock(&inode_mark->lock);
prev = &dn_mark->dn;
while ((dn = *prev) != NULL) {
if ((dn->dn_mask & test_mask) == 0) {
@@ -111,11 +114,11 @@
else {
*prev = dn->dn_next;
kmem_cache_free(dnotify_struct_cache, dn);
- dnotify_recalc_inode_mask(mark);
+ dnotify_recalc_inode_mask(inode_mark);
}
}
- spin_unlock(&mark->lock);
+ spin_unlock(&inode_mark->lock);
return 0;
}
@@ -126,8 +129,9 @@
*/
static bool dnotify_should_send_event(struct fsnotify_group *group,
struct inode *inode, struct vfsmount *mnt,
- struct fsnotify_mark *mark, __u32 mask,
- void *data, int data_type)
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
+ __u32 mask, void *data, int data_type)
{
/* not a dir, dnotify doesn't care */
if (!S_ISDIR(inode->i_mode))
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index fbd7f35..ef4fa4a 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -115,7 +115,8 @@
#endif
static int fanotify_handle_event(struct fsnotify_group *group,
- struct fsnotify_mark *mark,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *fanotify_mark,
struct fsnotify_event *event)
{
int ret = 0;
@@ -196,8 +197,11 @@
return true;
}
-static bool fanotify_should_send_event(struct fsnotify_group *group, struct inode *to_tell,
- struct vfsmount *mnt, struct fsnotify_mark *mark,
+static bool fanotify_should_send_event(struct fsnotify_group *group,
+ struct inode *to_tell,
+ struct vfsmount *mnt,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
{
pr_debug("%s: group=%p to_tell=%p mnt=%p mask=%x data=%p data_type=%d\n",
@@ -213,9 +217,10 @@
return false;
if (mnt)
- return should_send_vfsmount_event(group, mnt, to_tell, mark, mask);
+ return should_send_vfsmount_event(group, mnt, to_tell,
+ vfsmount_mark, mask);
else
- return should_send_inode_event(group, to_tell, mark, mask);
+ return should_send_inode_event(group, to_tell, inode_mark, mask);
}
const struct fsnotify_ops fanotify_fsnotify_ops = {
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index cdaa51c..090b64c 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -141,28 +141,51 @@
EXPORT_SYMBOL_GPL(__fsnotify_parent);
static int send_to_group(struct inode *to_tell, struct vfsmount *mnt,
- struct fsnotify_mark *mark,
- __u32 mask, void *data,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
+ __u32 mask, void *data,
int data_is, u32 cookie,
const unsigned char *file_name,
struct fsnotify_event **event)
{
- struct fsnotify_group *group = mark->group;
- __u32 test_mask = (mask & ~FS_EVENT_ON_CHILD);
+ struct fsnotify_group *group = inode_mark->group;
+ __u32 inode_test_mask = (mask & ~FS_EVENT_ON_CHILD);
+ __u32 vfsmount_test_mask = (mask & ~FS_EVENT_ON_CHILD);
pr_debug("%s: group=%p to_tell=%p mnt=%p mark=%p mask=%x data=%p"
" data_is=%d cookie=%d event=%p\n", __func__, group, to_tell,
- mnt, mark, mask, data, data_is, cookie, *event);
+ mnt, inode_mark, mask, data, data_is, cookie, *event);
- if ((mask & FS_MODIFY) &&
- !(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
- mark->ignored_mask = 0;
+ /* clear ignored on inode modification */
+ if (mask & FS_MODIFY) {
+ if (inode_mark &&
+ !(inode_mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
+ inode_mark->ignored_mask = 0;
+ if (vfsmount_mark &&
+ !(vfsmount_mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
+ vfsmount_mark->ignored_mask = 0;
+ }
- if (!(test_mask & mark->mask & ~mark->ignored_mask))
+ /* does the inode mark tell us to do something? */
+ if (inode_mark) {
+ inode_test_mask &= inode_mark->mask;
+ inode_test_mask &= ~inode_mark->ignored_mask;
+ }
+
+ /* does the vfsmount_mark tell us to do something? */
+ if (vfsmount_mark) {
+ vfsmount_test_mask &= vfsmount_mark->mask;
+ vfsmount_test_mask &= ~vfsmount_mark->ignored_mask;
+ if (inode_mark)
+ vfsmount_test_mask &= ~inode_mark->ignored_mask;
+ }
+
+ if (!inode_test_mask && !vfsmount_test_mask)
return 0;
- if (group->ops->should_send_event(group, to_tell, mnt, mark, mask,
- data, data_is) == false)
+ if (group->ops->should_send_event(group, to_tell, mnt, inode_mark,
+ vfsmount_mark, mask, data,
+ data_is) == false)
return 0;
if (!*event) {
@@ -172,7 +195,7 @@
if (!*event)
return -ENOMEM;
}
- return group->ops->handle_event(group, mark, *event);
+ return group->ops->handle_event(group, inode_mark, vfsmount_mark, *event);
}
/*
@@ -213,14 +236,16 @@
if ((mask & FS_MODIFY) ||
(test_mask & to_tell->i_fsnotify_mask))
- inode_node = to_tell->i_fsnotify_marks.first;
+ inode_node = srcu_dereference(to_tell->i_fsnotify_marks.first,
+ &fsnotify_mark_srcu);
else
inode_node = NULL;
if (mnt) {
if ((mask & FS_MODIFY) ||
(test_mask & mnt->mnt_fsnotify_mask))
- vfsmount_node = mnt->mnt_fsnotify_marks.first;
+ vfsmount_node = srcu_dereference(mnt->mnt_fsnotify_marks.first,
+ &fsnotify_mark_srcu);
else
vfsmount_node = NULL;
} else {
@@ -245,26 +270,27 @@
if (inode_group < vfsmount_group) {
/* handle inode */
- send_to_group(to_tell, NULL, inode_mark, mask, data,
+ send_to_group(to_tell, NULL, inode_mark, NULL, mask, data,
data_is, cookie, file_name, &event);
used_inode = true;
} else if (vfsmount_group < inode_group) {
- send_to_group(to_tell, mnt, vfsmount_mark, mask, data,
+ send_to_group(to_tell, mnt, NULL, vfsmount_mark, mask, data,
data_is, cookie, file_name, &event);
used_vfsmount = true;
} else {
- send_to_group(to_tell, mnt, vfsmount_mark, mask, data,
- data_is, cookie, file_name, &event);
+ send_to_group(to_tell, mnt, inode_mark, vfsmount_mark,
+ mask, data, data_is, cookie, file_name,
+ &event);
used_vfsmount = true;
- send_to_group(to_tell, NULL, inode_mark, mask, data,
- data_is, cookie, file_name, &event);
used_inode = true;
}
if (used_inode)
- inode_node = inode_node->next;
+ inode_node = srcu_dereference(inode_node->next,
+ &fsnotify_mark_srcu);
if (used_vfsmount)
- vfsmount_node = vfsmount_node->next;
+ vfsmount_node = srcu_dereference(vfsmount_node->next,
+ &fsnotify_mark_srcu);
}
srcu_read_unlock(&fsnotify_mark_srcu, idx);
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index 7cf518b..e53f497 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -90,7 +90,8 @@
}
static int inotify_handle_event(struct fsnotify_group *group,
- struct fsnotify_mark *mark,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
struct fsnotify_event *event)
{
struct inotify_inode_mark *i_mark;
@@ -100,12 +101,14 @@
struct fsnotify_event *added_event;
int wd, ret = 0;
+ BUG_ON(vfsmount_mark);
+
pr_debug("%s: group=%p event=%p to_tell=%p mask=%x\n", __func__, group,
event, event->to_tell, event->mask);
to_tell = event->to_tell;
- i_mark = container_of(mark, struct inotify_inode_mark,
+ i_mark = container_of(inode_mark, struct inotify_inode_mark,
fsn_mark);
wd = i_mark->wd;
@@ -127,8 +130,8 @@
ret = PTR_ERR(added_event);
}
- if (mark->mask & IN_ONESHOT)
- fsnotify_destroy_mark(mark);
+ if (inode_mark->mask & IN_ONESHOT)
+ fsnotify_destroy_mark(inode_mark);
return ret;
}
@@ -140,6 +143,7 @@
static bool inotify_should_send_event(struct fsnotify_group *group, struct inode *inode,
struct vfsmount *mnt, struct fsnotify_mark *mark,
+ struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
{
if ((mark->mask & FS_EXCL_UNLINK) &&
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 2e7cc8c..d38f922 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -92,9 +92,12 @@
*/
struct fsnotify_ops {
bool (*should_send_event)(struct fsnotify_group *group, struct inode *inode,
- struct vfsmount *mnt, struct fsnotify_mark *mark,
+ struct vfsmount *mnt, struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type);
- int (*handle_event)(struct fsnotify_group *group, struct fsnotify_mark *mark,
+ int (*handle_event)(struct fsnotify_group *group,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
struct fsnotify_event *event);
void (*free_group_priv)(struct fsnotify_group *group);
void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index 2abb99f..781ab7f 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -904,7 +904,8 @@
}
static int audit_tree_handle_event(struct fsnotify_group *group,
- struct fsnotify_mark *mark,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmonut_mark,
struct fsnotify_event *event)
{
BUG();
@@ -920,7 +921,8 @@
}
static bool audit_tree_send_event(struct fsnotify_group *group, struct inode *inode,
- struct vfsmount *mnt, struct fsnotify_mark *mark,
+ struct vfsmount *mnt, struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
{
return false;
diff --git a/kernel/audit_watch.c b/kernel/audit_watch.c
index 1b87e75..a273cf3 100644
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -503,7 +503,8 @@
}
static bool audit_watch_should_send_event(struct fsnotify_group *group, struct inode *inode,
- struct vfsmount *mnt, struct fsnotify_mark *mark,
+ struct vfsmount *mnt, struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
__u32 mask, void *data, int data_type)
{
return true;
@@ -511,7 +512,8 @@
/* Update watch data in audit rules based on fsnotify events. */
static int audit_watch_handle_event(struct fsnotify_group *group,
- struct fsnotify_mark *mark,
+ struct fsnotify_mark *inode_mark,
+ struct fsnotify_mark *vfsmount_mark,
struct fsnotify_event *event)
{
struct inode *inode;
@@ -519,7 +521,7 @@
const char *dname = event->file_name;
struct audit_parent *parent;
- parent = container_of(mark, struct audit_parent, mark);
+ parent = container_of(inode_mark, struct audit_parent, mark);
BUG_ON(group != audit_watch_group);