static struct percpu_counter nr_files __cacheline_aligned_in_smp;
-static inline void file_free_rcu(struct rcu_head *head)
+static void file_free_rcu(struct rcu_head *head)
{
struct file *f = container_of(head, struct file, f_u.fu_rcuhead);
return;
if (file_check_writeable(file) != 0)
return;
- mnt_drop_write(mnt);
+ __mnt_drop_write(mnt);
file_release_write(file);
}
if (file->f_op && file->f_op->fasync)
file->f_op->fasync(-1, file, 0);
}
+ ima_file_free(file);
if (file->f_op && file->f_op->release)
file->f_op->release(inode, file);
security_file_free(file);
- ima_file_free(file);
if (unlikely(S_ISCHR(inode->i_mode) && inode->i_cdev != NULL &&
!(file->f_mode & FMODE_PATH))) {
cdev_put(inode->i_cdev);
EXPORT_SYMBOL(fput);
-struct file *fget(unsigned int fd)
-{
- struct file *file;
- struct files_struct *files = current->files;
-
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- /* File object ref couldn't be taken */
- if (file->f_mode & FMODE_PATH ||
- !atomic_long_inc_not_zero(&file->f_count))
- file = NULL;
- }
- rcu_read_unlock();
-
- return file;
-}
-
-EXPORT_SYMBOL(fget);
-
-struct file *fget_raw(unsigned int fd)
-{
- struct file *file;
- struct files_struct *files = current->files;
-
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- /* File object ref couldn't be taken */
- if (!atomic_long_inc_not_zero(&file->f_count))
- file = NULL;
- }
- rcu_read_unlock();
-
- return file;
-}
-
-EXPORT_SYMBOL(fget_raw);
-
-/*
- * Lightweight file lookup - no refcnt increment if fd table isn't shared.
- *
- * You can use this instead of fget if you satisfy all of the following
- * conditions:
- * 1) You must call fput_light before exiting the syscall and returning control
- * to userspace (i.e. you cannot remember the returned struct file * after
- * returning to userspace).
- * 2) You must not call filp_close on the returned struct file * in between
- * calls to fget_light and fput_light.
- * 3) You must not clone the current task in between the calls to fget_light
- * and fput_light.
- *
- * The fput_needed flag returned by fget_light should be passed to the
- * corresponding fput_light.
- */
-struct file *fget_light(unsigned int fd, int *fput_needed)
-{
- struct file *file;
- struct files_struct *files = current->files;
-
- *fput_needed = 0;
- if (atomic_read(&files->count) == 1) {
- file = fcheck_files(files, fd);
- if (file && (file->f_mode & FMODE_PATH))
- file = NULL;
- } else {
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- if (!(file->f_mode & FMODE_PATH) &&
- atomic_long_inc_not_zero(&file->f_count))
- *fput_needed = 1;
- else
- /* Didn't get the reference, someone's freed */
- file = NULL;
- }
- rcu_read_unlock();
- }
-
- return file;
-}
-
-struct file *fget_raw_light(unsigned int fd, int *fput_needed)
-{
- struct file *file;
- struct files_struct *files = current->files;
-
- *fput_needed = 0;
- if (atomic_read(&files->count) == 1) {
- file = fcheck_files(files, fd);
- } else {
- rcu_read_lock();
- file = fcheck_files(files, fd);
- if (file) {
- if (atomic_long_inc_not_zero(&file->f_count))
- *fput_needed = 1;
- else
- /* Didn't get the reference, someone's freed */
- file = NULL;
- }
- rcu_read_unlock();
- }
-
- return file;
-}
-
void put_filp(struct file *file)
{
if (atomic_long_dec_and_test(&file->f_count)) {