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-rw-r--r--net/core/iovec.c137
1 files changed, 0 insertions, 137 deletions
diff --git a/net/core/iovec.c b/net/core/iovec.c
deleted file mode 100644
index dcbe98b3726a..000000000000
--- a/net/core/iovec.c
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * iovec manipulation routines.
- *
- *
- * 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.
- *
- * Fixes:
- * Andrew Lunn : Errors in iovec copying.
- * Pedro Roque : Added memcpy_fromiovecend and
- * csum_..._fromiovecend.
- * Andi Kleen : fixed error handling for 2.1
- * Alexey Kuznetsov: 2.1 optimisations
- * Andi Kleen : Fix csum*fromiovecend for IPv6.
- */
-
-#include <linux/errno.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/net.h>
-#include <linux/in6.h>
-#include <asm/uaccess.h>
-#include <asm/byteorder.h>
-#include <net/checksum.h>
-#include <net/sock.h>
-
-/*
- * And now for the all-in-one: copy and checksum from a user iovec
- * directly to a datagram
- * Calls to csum_partial but the last must be in 32 bit chunks
- *
- * ip_build_xmit must ensure that when fragmenting only the last
- * call to this function will be unaligned also.
- */
-int csum_partial_copy_fromiovecend(unsigned char *kdata, struct iovec *iov,
- int offset, unsigned int len, __wsum *csump)
-{
- __wsum csum = *csump;
- int partial_cnt = 0, err = 0;
-
- /* Skip over the finished iovecs */
- while (offset >= iov->iov_len) {
- offset -= iov->iov_len;
- iov++;
- }
-
- while (len > 0) {
- u8 __user *base = iov->iov_base + offset;
- int copy = min_t(unsigned int, len, iov->iov_len - offset);
-
- offset = 0;
-
- /* There is a remnant from previous iov. */
- if (partial_cnt) {
- int par_len = 4 - partial_cnt;
-
- /* iov component is too short ... */
- if (par_len > copy) {
- if (copy_from_user(kdata, base, copy))
- goto out_fault;
- kdata += copy;
- base += copy;
- partial_cnt += copy;
- len -= copy;
- iov++;
- if (len)
- continue;
- *csump = csum_partial(kdata - partial_cnt,
- partial_cnt, csum);
- goto out;
- }
- if (copy_from_user(kdata, base, par_len))
- goto out_fault;
- csum = csum_partial(kdata - partial_cnt, 4, csum);
- kdata += par_len;
- base += par_len;
- copy -= par_len;
- len -= par_len;
- partial_cnt = 0;
- }
-
- if (len > copy) {
- partial_cnt = copy % 4;
- if (partial_cnt) {
- copy -= partial_cnt;
- if (copy_from_user(kdata + copy, base + copy,
- partial_cnt))
- goto out_fault;
- }
- }
-
- if (copy) {
- csum = csum_and_copy_from_user(base, kdata, copy,
- csum, &err);
- if (err)
- goto out;
- }
- len -= copy + partial_cnt;
- kdata += copy + partial_cnt;
- iov++;
- }
- *csump = csum;
-out:
- return err;
-
-out_fault:
- err = -EFAULT;
- goto out;
-}
-EXPORT_SYMBOL(csum_partial_copy_fromiovecend);
-
-unsigned long iov_pages(const struct iovec *iov, int offset,
- unsigned long nr_segs)
-{
- unsigned long seg, base;
- int pages = 0, len, size;
-
- while (nr_segs && (offset >= iov->iov_len)) {
- offset -= iov->iov_len;
- ++iov;
- --nr_segs;
- }
-
- for (seg = 0; seg < nr_segs; seg++) {
- base = (unsigned long)iov[seg].iov_base + offset;
- len = iov[seg].iov_len - offset;
- size = ((base & ~PAGE_MASK) + len + ~PAGE_MASK) >> PAGE_SHIFT;
- pages += size;
- offset = 0;
- }
-
- return pages;
-}
-EXPORT_SYMBOL(iov_pages);