linux-master/kernel/fork.c

36 #include <linux/file.h>
615 	struct file *exe_file;
649 	/* No ordering required: file already has been exposed. */
669 		struct file *file;
734 		file = tmp->vm_file;
735 		if (file) {
736 			struct address_space *mapping = file->f_mapping;
738 			get_file(file);
1392  * set_mm_exe_file - change a reference to the mm's executable file
1394  * @new_exe_file: The new file to use.
1396  * This changes mm's executable file (shown as symlink /proc/[pid]/exe).
1404 int set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file)
1406 	struct file *old_exe_file;
1433  * replace_mm_exe_file - replace a reference to the mm's executable file
1435  * @new_exe_file: The new file to use.
1437  * This changes mm's executable file (shown as symlink /proc/[pid]/exe).
1441 int replace_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file)
1444 	struct file *old_exe_file;
1447 	/* Forbid mm->exe_file change if old file still mapped. */
1472 	/* set the new file */
1486  * get_mm_exe_file - acquire a reference to the mm's executable file
1489  * Returns %NULL if mm has no associated executable file.
1490  * User must release file via fput().
1492 struct file *get_mm_exe_file(struct mm_struct *mm)
1494 	struct file *exe_file;
1503  * get_task_exe_file - acquire a reference to the task's executable file
1506  * Returns %NULL if task's mm (if any) has no associated executable file or
1508  * User must release file via fput().
1510 struct file *get_task_exe_file(struct task_struct *task)
1512 	struct file *exe_file = NULL;
1996  * @ret: Where to return the file for the pidfd.
1998  * Allocate a new file that stashes @pid and reserve a new pidfd number in the
1999  * caller's file descriptor table. The pidfd is reserved but not installed yet.
2003  * pidfd file are prepared.
2006  * call fd_install() passing the returned pidfd and pidfd file as arguments in
2007  * order to install the pidfd into its file descriptor table or they must use
2008  * put_unused_fd() and fput() on the returned pidfd and pidfd file
2013  * that no pidfd is leaked into its file descriptor table.
2016  *         pidfd file is returned in the last argument to the function. On
2020 static int __pidfd_prepare(struct pid *pid, unsigned int flags, struct file **ret)
2023 	struct file *pidfd_file;
2049  * Allocate a new file that stashes @pid and reserve a new pidfd number in the
2050  * caller's file descriptor table. The pidfd is reserved but not installed yet.
2056  * call fd_install() passing the returned pidfd and pidfd file as arguments in
2057  * order to install the pidfd into its file descriptor table or they must use
2058  * put_unused_fd() and fput() on the returned pidfd and pidfd file
2063  * that no pidfd is leaked into its file descriptor table.
2066  *         pidfd file is returned in the last argument to the function. On
2070 int pidfd_prepare(struct pid *pid, unsigned int flags, struct file **ret)
2143 	struct file *pidfile = NULL;
2415 	 * This has to happen after we've potentially unshared the file
3247  * Unshare file descriptor table if it is being shared