diff options
Diffstat (limited to 'fs/file.c')
| -rw-r--r-- | fs/file.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/fs/file.c b/fs/file.c index 50304c7525ea..3209ee271c41 100644 --- a/fs/file.c +++ b/fs/file.c @@ -640,6 +640,35 @@ out_unlock: } EXPORT_SYMBOL(__close_fd); /* for ksys_close() */ +/* + * variant of __close_fd that gets a ref on the file for later fput + */ +int __close_fd_get_file(unsigned int fd, struct file **res) +{ + struct files_struct *files = current->files; + struct file *file; + struct fdtable *fdt; + + spin_lock(&files->file_lock); + fdt = files_fdtable(files); + if (fd >= fdt->max_fds) + goto out_unlock; + file = fdt->fd[fd]; + if (!file) + goto out_unlock; + rcu_assign_pointer(fdt->fd[fd], NULL); + __put_unused_fd(files, fd); + spin_unlock(&files->file_lock); + get_file(file); + *res = file; + return filp_close(file, files); + +out_unlock: + spin_unlock(&files->file_lock); + *res = NULL; + return -ENOENT; +} + void do_close_on_exec(struct files_struct *files) { unsigned i; |