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authorDavid S. Miller <davem@davemloft.net>2015-02-05 05:46:55 +0100
committerDavid S. Miller <davem@davemloft.net>2015-02-05 05:46:55 +0100
commitf2683b743f2334ef49a5361bf596dd1fbd2c9be4 (patch)
tree7f53b2614742238e966ba8a815ef6c5079422ee2 /lib
parenttcp: do not pace pure ack packets (diff)
parentvhost: vhost_scsi_handle_vq() should just use copy_from_user() (diff)
downloadlinux-f2683b743f2334ef49a5361bf596dd1fbd2c9be4.tar.xz
linux-f2683b743f2334ef49a5361bf596dd1fbd2c9be4.zip
Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
More iov_iter work from Al Viro. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib')
-rw-r--r--lib/Makefile2
-rw-r--r--lib/iovec.c87
2 files changed, 1 insertions, 88 deletions
diff --git a/lib/Makefile b/lib/Makefile
index a8cf98d14199..7db78934ec07 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -24,7 +24,7 @@ obj-y += lockref.o
obj-y += bcd.o div64.o sort.o parser.o halfmd4.o debug_locks.o random32.o \
bust_spinlocks.o hexdump.o kasprintf.o bitmap.o scatterlist.o \
- gcd.o lcm.o list_sort.o uuid.o flex_array.o iovec.o clz_ctz.o \
+ gcd.o lcm.o list_sort.o uuid.o flex_array.o clz_ctz.o \
bsearch.o find_last_bit.o find_next_bit.o llist.o memweight.o kfifo.o \
percpu-refcount.o percpu_ida.o rhashtable.o reciprocal_div.o
obj-y += string_helpers.o
diff --git a/lib/iovec.c b/lib/iovec.c
deleted file mode 100644
index 2d99cb4a5006..000000000000
--- 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);