/* drop all shared dentries from other superblocks */
void sdcardfs_drop_sb_icache(struct super_block *sb, unsigned long ino)
{
struct inode *inode = ilookup(sb, ino);
struct dentry *dentry, *dir_dentry;
if (!inode)
return;
dentry = d_find_any_alias(inode);
if (!dentry) {
iput(inode);
return;
}
dir_dentry = lock_parent(dentry);
mutex_lock(&inode->i_mutex);
set_nlink(inode, sdcardfs_lower_inode(inode)->i_nlink);
d_drop(dentry);
dont_mount(dentry);
mutex_unlock(&inode->i_mutex);
/* We don't d_delete() NFS sillyrenamed files--they still exist. */
if (!(dentry->d_flags & DCACHE_NFSFS_RENAMED)) {
fsnotify_link_count(inode);
d_delete(dentry);
}
unlock_dir(dir_dentry);
dput(dentry);
iput(inode);
}
int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
u64 child_nodeid, struct qstr *name)
{
int err = -ENOTDIR;
struct inode *parent;
struct dentry *dir;
struct dentry *entry;
parent = ilookup5(sb, parent_nodeid, fuse_inode_eq, &parent_nodeid);
if (!parent)
return -ENOENT;
mutex_lock(&parent->i_mutex);
if (!S_ISDIR(parent->i_mode))
goto unlock;
err = -ENOENT;
dir = d_find_alias(parent);
if (!dir)
goto unlock;
entry = d_lookup(dir, name);
dput(dir);
if (!entry)
goto unlock;
fuse_invalidate_attr(parent);
fuse_invalidate_entry(entry);
if (child_nodeid != 0 && entry->d_inode) {
mutex_lock(&entry->d_inode->i_mutex);
if (get_node_id(entry->d_inode) != child_nodeid) {
err = -ENOENT;
goto badentry;
}
if (d_mountpoint(entry)) {
err = -EBUSY;
goto badentry;
}
if (S_ISDIR(entry->d_inode->i_mode)) {
shrink_dcache_parent(entry);
if (!simple_empty(entry)) {
err = -ENOTEMPTY;
goto badentry;
}
entry->d_inode->i_flags |= S_DEAD;
}
dont_mount(entry);
clear_nlink(entry->d_inode);
err = 0;
badentry:
mutex_unlock(&entry->d_inode->i_mutex);
if (!err)
d_delete(entry);
} else {
err = 0;
}
dput(entry);
unlock:
mutex_unlock(&parent->i_mutex);
iput(parent);
return err;
}
int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid,
u64 child_nodeid, struct qstr *name)
{
int err = -ENOTDIR;
struct inode *parent;
struct dentry *dir;
struct dentry *entry;
parent = ilookup5(sb, parent_nodeid, fuse_inode_eq, &parent_nodeid);
if (!parent)
return -ENOENT;
inode_lock(parent);
if (!S_ISDIR(parent->i_mode))
goto unlock;
err = -ENOENT;
dir = d_find_alias(parent);
if (!dir)
goto unlock;
name->hash = full_name_hash(dir, name->name, name->len);
entry = d_lookup(dir, name);
dput(dir);
if (!entry)
goto unlock;
fuse_dir_changed(parent);
fuse_invalidate_entry(entry);
if (child_nodeid != 0 && d_really_is_positive(entry)) {
inode_lock(d_inode(entry));
if (get_node_id(d_inode(entry)) != child_nodeid) {
err = -ENOENT;
goto badentry;
}
if (d_mountpoint(entry)) {
err = -EBUSY;
goto badentry;
}
if (d_is_dir(entry)) {
shrink_dcache_parent(entry);
if (!simple_empty(entry)) {
err = -ENOTEMPTY;
goto badentry;
}
d_inode(entry)->i_flags |= S_DEAD;
}
dont_mount(entry);
clear_nlink(d_inode(entry));
err = 0;
badentry:
inode_unlock(d_inode(entry));
if (!err)
d_delete(entry);
} else {
err = 0;
}
dput(entry);
unlock:
inode_unlock(parent);
iput(parent);
return err;
}
