fsnotify: put inode specific fields in an fsnotify_mark in a union
The addition of marks on vfs mounts will be simplified if the inode
specific parts of a mark and the vfsmnt specific parts of a mark are
actually in a union so naming can be easy. This patch just implements the
inode struct and the union.
Signed-off-by: Eric Paris <eparis@redhat.com>
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index 9eddafa..fc3a9dc 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -70,8 +70,8 @@
if (old_mask == new_mask)
return;
- if (entry->inode)
- fsnotify_recalc_inode_mask(entry->inode);
+ if (entry->i.inode)
+ fsnotify_recalc_inode_mask(entry->i.inode);
}
/*
diff --git a/fs/notify/inode_mark.c b/fs/notify/inode_mark.c
index beffebb..6731408 100644
--- a/fs/notify/inode_mark.c
+++ b/fs/notify/inode_mark.c
@@ -117,7 +117,7 @@
assert_spin_locked(&inode->i_lock);
- hlist_for_each_entry(entry, pos, &inode->i_fsnotify_mark_entries, i_list)
+ hlist_for_each_entry(entry, pos, &inode->i_fsnotify_mark_entries, i.i_list)
new_mask |= entry->mask;
inode->i_fsnotify_mask = new_mask;
}
@@ -148,7 +148,7 @@
spin_lock(&entry->lock);
group = entry->group;
- inode = entry->inode;
+ inode = entry->i.inode;
BUG_ON(group && !inode);
BUG_ON(!group && inode);
@@ -165,8 +165,8 @@
spin_lock(&group->mark_lock);
spin_lock(&inode->i_lock);
- hlist_del_init(&entry->i_list);
- entry->inode = NULL;
+ hlist_del_init(&entry->i.i_list);
+ entry->i.inode = NULL;
list_del_init(&entry->g_list);
entry->group = NULL;
@@ -248,14 +248,14 @@
LIST_HEAD(free_list);
spin_lock(&inode->i_lock);
- hlist_for_each_entry_safe(entry, pos, n, &inode->i_fsnotify_mark_entries, i_list) {
- list_add(&entry->free_i_list, &free_list);
- hlist_del_init(&entry->i_list);
+ hlist_for_each_entry_safe(entry, pos, n, &inode->i_fsnotify_mark_entries, i.i_list) {
+ list_add(&entry->i.free_i_list, &free_list);
+ hlist_del_init(&entry->i.i_list);
fsnotify_get_mark(entry);
}
spin_unlock(&inode->i_lock);
- list_for_each_entry_safe(entry, lentry, &free_list, free_i_list) {
+ list_for_each_entry_safe(entry, lentry, &free_list, i.free_i_list) {
fsnotify_destroy_mark_by_entry(entry);
fsnotify_put_mark(entry);
}
@@ -273,7 +273,7 @@
assert_spin_locked(&inode->i_lock);
- hlist_for_each_entry(entry, pos, &inode->i_fsnotify_mark_entries, i_list) {
+ hlist_for_each_entry(entry, pos, &inode->i_fsnotify_mark_entries, i.i_list) {
if (entry->group == group) {
fsnotify_get_mark(entry);
return entry;
@@ -285,7 +285,7 @@
void fsnotify_duplicate_mark(struct fsnotify_mark_entry *new, struct fsnotify_mark_entry *old)
{
assert_spin_locked(&old->lock);
- new->inode = old->inode;
+ new->i.inode = old->i.inode;
new->group = old->group;
new->mask = old->mask;
new->free_mark = old->free_mark;
@@ -299,10 +299,10 @@
{
spin_lock_init(&entry->lock);
atomic_set(&entry->refcnt, 1);
- INIT_HLIST_NODE(&entry->i_list);
+ INIT_HLIST_NODE(&entry->i.i_list);
entry->group = NULL;
entry->mask = 0;
- entry->inode = NULL;
+ entry->i.inode = NULL;
entry->free_mark = free_mark;
}
@@ -350,9 +350,9 @@
lentry = fsnotify_find_mark_entry(group, inode);
if (!lentry) {
entry->group = group;
- entry->inode = inode;
+ entry->i.inode = inode;
- hlist_add_head(&entry->i_list, &inode->i_fsnotify_mark_entries);
+ hlist_add_head(&entry->i.i_list, &inode->i_fsnotify_mark_entries);
list_add(&entry->g_list, &group->mark_entries);
fsnotify_get_mark(entry); /* for i_list and g_list */
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index 8075ae7..3edb51c 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -193,7 +193,7 @@
*/
if (entry)
printk(KERN_WARNING "entry->group=%p inode=%p wd=%d\n",
- entry->group, entry->inode, ientry->wd);
+ entry->group, entry->i.inode, ientry->wd);
return 0;
}
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index a48d68a..4b1587f 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -445,7 +445,7 @@
if (wd == -1) {
WARN_ONCE(1, "%s: ientry=%p ientry->wd=%d ientry->group=%p"
" ientry->inode=%p\n", __func__, ientry, ientry->wd,
- ientry->fsn_entry.group, ientry->fsn_entry.inode);
+ ientry->fsn_entry.group, ientry->fsn_entry.i.inode);
goto out;
}
@@ -454,7 +454,7 @@
if (unlikely(!found_ientry)) {
WARN_ONCE(1, "%s: ientry=%p ientry->wd=%d ientry->group=%p"
" ientry->inode=%p\n", __func__, ientry, ientry->wd,
- ientry->fsn_entry.group, ientry->fsn_entry.inode);
+ ientry->fsn_entry.group, ientry->fsn_entry.i.inode);
goto out;
}
@@ -468,9 +468,9 @@
"entry->inode=%p found_ientry=%p found_ientry->wd=%d "
"found_ientry->group=%p found_ientry->inode=%p\n",
__func__, ientry, ientry->wd, ientry->fsn_entry.group,
- ientry->fsn_entry.inode, found_ientry, found_ientry->wd,
+ ientry->fsn_entry.i.inode, found_ientry, found_ientry->wd,
found_ientry->fsn_entry.group,
- found_ientry->fsn_entry.inode);
+ found_ientry->fsn_entry.i.inode);
goto out;
}
@@ -482,7 +482,7 @@
if (unlikely(atomic_read(&ientry->fsn_entry.refcnt) < 3)) {
printk(KERN_ERR "%s: ientry=%p ientry->wd=%d ientry->group=%p"
" ientry->inode=%p\n", __func__, ientry, ientry->wd,
- ientry->fsn_entry.group, ientry->fsn_entry.inode);
+ ientry->fsn_entry.group, ientry->fsn_entry.i.inode);
/* we can't really recover with bad ref cnting.. */
BUG();
}
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index c2a04b7..dca7f2c 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -227,6 +227,15 @@
};
/*
+ * Inode specific fields in an fsnotify_mark_entry
+ */
+struct fsnotify_inode_mark {
+ struct inode *inode; /* inode this entry is associated with */
+ struct hlist_node i_list; /* list of mark_entries by inode->i_fsnotify_mark_entries */
+ struct list_head free_i_list; /* tmp list used when freeing this mark */
+};
+
+/*
* a mark is simply an entry attached to an in core inode which allows an
* fsnotify listener to indicate they are either no longer interested in events
* of a type matching mask or only interested in those events.
@@ -241,12 +250,12 @@
/* we hold ref for each i_list and g_list. also one ref for each 'thing'
* in kernel that found and may be using this mark. */
atomic_t refcnt; /* active things looking at this mark */
- struct inode *inode; /* inode this entry is associated with */
struct fsnotify_group *group; /* group this mark entry is for */
- struct hlist_node i_list; /* list of mark_entries by inode->i_fsnotify_mark_entries */
struct list_head g_list; /* list of mark_entries by group->i_fsnotify_mark_entries */
- spinlock_t lock; /* protect group, inode, and killme */
- struct list_head free_i_list; /* tmp list used when freeing this mark */
+ spinlock_t lock; /* protect group and inode */
+ union {
+ struct fsnotify_inode_mark i;
+ };
struct list_head free_g_list; /* tmp list used when freeing this mark */
void (*free_mark)(struct fsnotify_mark_entry *entry); /* called on final put+free */
};
diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index ecf0bf2..c21b05d 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -179,9 +179,9 @@
struct fsnotify_mark_entry *entry = &chunk->mark;
struct list_head *list;
- if (!entry->inode)
+ if (!entry->i.inode)
return;
- list = chunk_hash(entry->inode);
+ list = chunk_hash(entry->i.inode);
list_add_rcu(&chunk->hash, list);
}
@@ -193,7 +193,7 @@
list_for_each_entry_rcu(p, list, hash) {
/* mark.inode may have gone NULL, but who cares? */
- if (p->mark.inode == inode) {
+ if (p->mark.i.inode == inode) {
atomic_long_inc(&p->refs);
return p;
}
@@ -233,7 +233,7 @@
spin_unlock(&hash_lock);
spin_lock(&entry->lock);
- if (chunk->dead || !entry->inode) {
+ if (chunk->dead || !entry->i.inode) {
spin_unlock(&entry->lock);
goto out;
}
@@ -259,7 +259,7 @@
if (!new)
goto Fallback;
fsnotify_duplicate_mark(&new->mark, entry);
- if (fsnotify_add_mark(&new->mark, new->mark.group, new->mark.inode, 1)) {
+ if (fsnotify_add_mark(&new->mark, new->mark.group, new->mark.i.inode, 1)) {
free_chunk(new);
goto Fallback;
}
@@ -388,7 +388,7 @@
chunk_entry = &chunk->mark;
spin_lock(&old_entry->lock);
- if (!old_entry->inode) {
+ if (!old_entry->i.inode) {
/* old_entry is being shot, lets just lie */
spin_unlock(&old_entry->lock);
fsnotify_put_mark(old_entry);
@@ -397,7 +397,7 @@
}
fsnotify_duplicate_mark(chunk_entry, old_entry);
- if (fsnotify_add_mark(chunk_entry, chunk_entry->group, chunk_entry->inode, 1)) {
+ if (fsnotify_add_mark(chunk_entry, chunk_entry->group, chunk_entry->i.inode, 1)) {
spin_unlock(&old_entry->lock);
free_chunk(chunk);
fsnotify_put_mark(old_entry);
@@ -605,7 +605,7 @@
list_for_each_entry(node, &tree->chunks, list) {
struct audit_chunk *chunk = find_chunk(node);
/* this could be NULL if the watch is dieing else where... */
- struct inode *inode = chunk->mark.inode;
+ struct inode *inode = chunk->mark.i.inode;
node->index |= 1U<<31;
if (iterate_mounts(compare_root, inode, root_mnt))
node->index &= ~(1U<<31);