diff options
Diffstat (limited to 'fs/file_table.c')
| -rw-r--r-- | fs/file_table.c | 106 | 
1 files changed, 0 insertions, 106 deletions
| diff --git a/fs/file_table.c b/fs/file_table.c index 701985e4ccda..c6780163bf3e 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -339,112 +339,6 @@ void __fput_sync(struct file *file)  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)) { | 
