linux-master/fs/file.c

54 static void copy_fd_bitmaps(struct fdtable *nfdt, struct fdtable *ofdt,
61 	memcpy(nfdt->open_fds, ofdt->open_fds, cpy);
63 	memcpy(nfdt->close_on_exec, ofdt->close_on_exec, cpy);
68 	memcpy(nfdt->full_fds_bits, ofdt->full_fds_bits, cpy);
76 static void copy_fdtable(struct fdtable *nfdt, struct fdtable *ofdt)
80 	BUG_ON(nfdt->max_fds < ofdt->max_fds);
82 	cpy = ofdt->max_fds * sizeof(struct file *);
83 	set = (nfdt->max_fds - ofdt->max_fds) * sizeof(struct file *);
84 	memcpy(nfdt->fd, ofdt->fd, cpy);
87 	copy_fd_bitmaps(nfdt, ofdt, ofdt->max_fds);