#include <linux/dnotify.h>
#include <linux/statfs.h>
#include <linux/security.h>
-#include <linux/ima.h>
+#include <linux/magic.h>
#include <asm/uaccess.h>
-/* some random number */
-#define HUGETLBFS_MAGIC 0x958458f6
-
static const struct super_operations hugetlbfs_ops;
static const struct address_space_operations hugetlbfs_aops;
const struct file_operations hugetlbfs_file_operations;
static const struct inode_operations hugetlbfs_inode_operations;
static struct backing_dev_info hugetlbfs_backing_dev_info = {
+ .name = "hugetlbfs",
.ra_pages = 0, /* No readahead */
.capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK,
};
static void hugetlbfs_forget_inode(struct inode *inode) __releases(inode_lock)
{
- struct super_block *sb = inode->i_sb;
-
- if (!hlist_unhashed(&inode->i_hash)) {
- if (!(inode->i_state & (I_DIRTY|I_SYNC)))
- list_move(&inode->i_list, &inode_unused);
- inodes_stat.nr_unused++;
- if (!sb || (sb->s_flags & MS_ACTIVE)) {
- spin_unlock(&inode_lock);
- return;
- }
- inode->i_state |= I_WILL_FREE;
- spin_unlock(&inode_lock);
- /*
- * write_inode_now is a noop as we set BDI_CAP_NO_WRITEBACK
- * in our backing_dev_info.
- */
- write_inode_now(inode, 1);
- spin_lock(&inode_lock);
- inode->i_state &= ~I_WILL_FREE;
- inodes_stat.nr_unused--;
- hlist_del_init(&inode->i_hash);
+ if (generic_detach_inode(inode)) {
+ truncate_hugepages(inode, 0);
+ clear_inode(inode);
+ destroy_inode(inode);
}
- list_del_init(&inode->i_list);
- list_del_init(&inode->i_sb_list);
- inode->i_state |= I_FREEING;
- inodes_stat.nr_inodes--;
- spin_unlock(&inode_lock);
- truncate_hugepages(inode, 0);
- clear_inode(inode);
- destroy_inode(inode);
}
static void hugetlbfs_drop_inode(struct inode *inode)
inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
INIT_LIST_HEAD(&inode->i_mapping->private_list);
info = HUGETLBFS_I(inode);
+ /*
+ * The policy is initialized here even if we are creating a
+ * private inode because initialization simply creates an
+ * an empty rb tree and calls spin_lock_init(), later when we
+ * call mpol_free_shared_policy() it will just return because
+ * the rb tree will still be empty.
+ */
mpol_shared_policy_init(&info->policy, NULL);
switch (mode & S_IFMT) {
default:
}
struct file *hugetlb_file_setup(const char *name, size_t size, int acctflag,
- struct user_struct **user)
+ struct user_struct **user, int creat_flags)
{
int error = -ENOMEM;
struct file *file;
struct inode *inode;
- struct dentry *dentry, *root;
+ struct path path;
+ struct dentry *root;
struct qstr quick_string;
*user = NULL;
if (!hugetlbfs_vfsmount)
return ERR_PTR(-ENOENT);
- if (!can_do_hugetlb_shm()) {
+ if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) {
*user = current_user();
if (user_shm_lock(size, *user)) {
WARN_ONCE(1,
quick_string.name = name;
quick_string.len = strlen(quick_string.name);
quick_string.hash = 0;
- dentry = d_alloc(root, &quick_string);
- if (!dentry)
+ path.dentry = d_alloc(root, &quick_string);
+ if (!path.dentry)
goto out_shm_unlock;
+ path.mnt = mntget(hugetlbfs_vfsmount);
error = -ENOSPC;
inode = hugetlbfs_get_inode(root->d_sb, current_fsuid(),
current_fsgid(), S_IFREG | S_IRWXUGO, 0);
acctflag))
goto out_inode;
- d_instantiate(dentry, inode);
+ d_instantiate(path.dentry, inode);
inode->i_size = size;
inode->i_nlink = 0;
error = -ENFILE;
- file = alloc_file(hugetlbfs_vfsmount, dentry,
- FMODE_WRITE | FMODE_READ,
+ file = alloc_file(&path, FMODE_WRITE | FMODE_READ,
&hugetlbfs_file_operations);
if (!file)
goto out_dentry; /* inode is already attached */
- ima_counts_get(file);
return file;
out_inode:
iput(inode);
out_dentry:
- dput(dentry);
+ path_put(&path);
out_shm_unlock:
if (*user) {
user_shm_unlock(size, *user);