summaryrefslogtreecommitdiffstats
path: root/lib/iovec.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/iovec.c')
-rw-r--r--lib/iovec.c87
1 files changed, 0 insertions, 87 deletions
diff --git a/lib/iovec.c b/lib/iovec.c
deleted file mode 100644
index 2d99cb4a500..00000000000
--- a/lib/iovec.c
+++ /dev/null
@@ -1,87 +0,0 @@
-#include <linux/uaccess.h>
-#include <linux/export.h>
-#include <linux/uio.h>
-
-/*
- * Copy iovec to kernel. Returns -EFAULT on error.
- *
- * Note: this modifies the original iovec.
- */
-
-int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len)
-{
- while (len > 0) {
- if (iov->iov_len) {
- int copy = min_t(unsigned int, len, iov->iov_len);
- if (copy_from_user(kdata, iov->iov_base, copy))
- return -EFAULT;
- len -= copy;
- kdata += copy;
- iov->iov_base += copy;
- iov->iov_len -= copy;
- }
- iov++;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(memcpy_fromiovec);
-
-/*
- * Copy kernel to iovec. Returns -EFAULT on error.
- */
-
-int memcpy_toiovecend(const struct iovec *iov, unsigned char *kdata,
- int offset, int len)
-{
- int copy;
- for (; len > 0; ++iov) {
- /* Skip over the finished iovecs */
- if (unlikely(offset >= iov->iov_len)) {
- offset -= iov->iov_len;
- continue;
- }
- copy = min_t(unsigned int, iov->iov_len - offset, len);
- if (copy_to_user(iov->iov_base + offset, kdata, copy))
- return -EFAULT;
- offset = 0;
- kdata += copy;
- len -= copy;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(memcpy_toiovecend);
-
-/*
- * Copy iovec to kernel. Returns -EFAULT on error.
- */
-
-int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov,
- int offset, int len)
-{
- /* No data? Done! */
- if (len == 0)
- return 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;
- if (copy_from_user(kdata, base, copy))
- return -EFAULT;
- len -= copy;
- kdata += copy;
- iov++;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(memcpy_fromiovecend);