| #include <linux/compiler.h> |
| * Berkeley style UIO structures - Alan Cox 1994. |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| void __user *iov_base; /* BSD uses caddr_t (1003.1g requires void *) */ |
| __kernel_size_t iov_len; /* Must be size_t (1003.1g) */ |
| void *iov_base; /* and that should *never* hold a userland pointer */ |
| * UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1) |
| * Total number of bytes covered by an iovec. |
| * NOTE that it is not safe to use this function until all the iovec's |
| * segment lengths have been validated. Because the individual lengths can |
| * overflow a size_t when added together. |
| static inline size_t iov_length(const struct iovec *iov, unsigned long nr_segs) |
| for (seg = 0; seg < nr_segs; seg++) |
| unsigned long iov_shorten(struct iovec *iov, unsigned long nr_segs, size_t to); |