static int oprofilefs_fill_super(struct super_block * sb, void * data, int silent)
{
struct inode * root_inode;
struct dentry * root_dentry;
sb->s_blocksize = PAGE_CACHE_SIZE;
sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
sb->s_magic = OPROFILEFS_MAGIC;
sb->s_op = &s_ops;
sb->s_time_gran = 1;
root_inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
if (!root_inode)
return -ENOMEM;
root_inode->i_op = &simple_dir_inode_operations;
root_inode->i_fop = &simple_dir_operations;
root_dentry = d_alloc_root(root_inode);
if (!root_dentry) {
iput(root_inode);
return -ENOMEM;
}
sb->s_root = root_dentry;
oprofile_create_files(sb, root_dentry);
// FIXME: verify kill_litter_super removes our dentries
return 0;
}
struct dentry * oprofilefs_mkdir(struct super_block * sb,
struct dentry * root, char const * name)
{
struct dentry * dentry;
struct inode * inode;
dentry = d_alloc_name(root, name);
if (!dentry)
return NULL;
inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
if (!inode) {
dput(dentry);
return NULL;
}
inode->i_op = &simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
d_add(dentry, inode);
return dentry;
}
static struct dentry * __oprofilefs_create_file(struct super_block * sb,
struct dentry * root, char const * name, const struct file_operations * fops,
int perm)
{
struct dentry * dentry;
struct inode * inode;
dentry = d_alloc_name(root, name);
if (!dentry)
return NULL;
inode = oprofilefs_get_inode(sb, S_IFREG | perm);
if (!inode) {
dput(dentry);
return NULL;
}
inode->i_fop = fops;
d_add(dentry, inode);
return dentry;
}
static int __oprofilefs_create_file(struct super_block *sb,
struct dentry *root, char const *name, const struct file_operations *fops,
int perm, void *priv)
{
struct dentry *dentry;
struct inode *inode;
dentry = d_alloc_name(root, name);
if (!dentry)
return -ENOMEM;
inode = oprofilefs_get_inode(sb, S_IFREG | perm);
if (!inode) {
dput(dentry);
return -ENOMEM;
}
inode->i_fop = fops;
d_add(dentry, inode);
dentry->d_inode->i_private = priv;
return 0;
}
static struct dentry * __oprofilefs_create_file(struct super_block * sb,
struct dentry * root, char const * name, struct file_operations * fops)
{
struct dentry * dentry;
struct inode * inode;
struct qstr qname;
qname.name = name;
qname.len = strlen(name);
qname.hash = full_name_hash(qname.name, qname.len);
dentry = d_alloc(root, &qname);
if (!dentry)
return 0;
inode = oprofilefs_get_inode(sb, S_IFREG | 0644);
if (!inode) {
dput(dentry);
return 0;
}
inode->i_fop = fops;
d_add(dentry, inode);
return dentry;
}
struct dentry * oprofilefs_mkdir(struct super_block * sb,
struct dentry * root, char const * name)
{
struct dentry * dentry;
struct inode * inode;
struct qstr qname;
qname.name = name;
qname.len = strlen(name);
qname.hash = full_name_hash(qname.name, qname.len);
dentry = d_alloc(root, &qname);
if (!dentry)
return 0;
inode = oprofilefs_get_inode(sb, S_IFDIR | 0755);
if (!inode) {
dput(dentry);
return 0;
}
inode->i_op = &oprofilefs_dir_inode_operations;
inode->i_fop = &oprofilefs_dir_operations;
d_add(dentry, inode);
return dentry;
}
struct dentry *oprofilefs_mkdir(struct dentry *parent, char const *name)
{
struct dentry *dentry;
struct inode *inode;
inode_lock(d_inode(parent));
dentry = d_alloc_name(parent, name);
if (!dentry) {
inode_unlock(d_inode(parent));
return NULL;
}
inode = oprofilefs_get_inode(parent->d_sb, S_IFDIR | 0755);
if (!inode) {
dput(dentry);
inode_unlock(d_inode(parent));
return NULL;
}
inode->i_op = &simple_dir_inode_operations;
inode->i_fop = &simple_dir_operations;
d_add(dentry, inode);
inode_unlock(d_inode(parent));
return dentry;
}
