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authorRusty Russell <rusty@rustcorp.com.au>2013-05-17 03:35:21 +0400
committerRusty Russell <rusty@rustcorp.com.au>2013-05-20 04:54:22 +0400
commitd2f83e9078b8114e3b9d09082856c1aac299aa37 (patch)
tree707f0d810d28e000eb3f9a775be880687dde1030
parentd5fe85af85367d5892e4308f596de4e2a5fb9017 (diff)
downloadlinux-d2f83e9078b8114e3b9d09082856c1aac299aa37.tar.xz
Hoist memcpy_fromiovec/memcpy_toiovec into lib/
ERROR: "memcpy_fromiovec" [drivers/vhost/vhost_scsi.ko] undefined! That function is only present with CONFIG_NET. Turns out that crypto/algif_skcipher.c also uses that outside net, but it actually needs sockets anyway. In addition, commit 6d4f0139d642c45411a47879325891ce2a7c164a added CONFIG_NET dependency to CONFIG_VMCI for memcpy_toiovec, so hoist that function and revert that commit too. socket.h already includes uio.h, so no callers need updating; trying only broke things fo x86_64 randconfig (thanks Fengguang!). Reported-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
-rw-r--r--drivers/misc/vmw_vmci/Kconfig2
-rw-r--r--drivers/misc/vmw_vmci/vmci_queue_pair.c2
-rw-r--r--include/linux/socket.h2
-rw-r--r--include/linux/uio.h3
-rw-r--r--lib/Makefile2
-rw-r--r--lib/iovec.c53
-rw-r--r--net/core/iovec.c50
7 files changed, 59 insertions, 55 deletions
diff --git a/drivers/misc/vmw_vmci/Kconfig b/drivers/misc/vmw_vmci/Kconfig
index ea98f7e9ccd1..39c2ecadb273 100644
--- a/drivers/misc/vmw_vmci/Kconfig
+++ b/drivers/misc/vmw_vmci/Kconfig
@@ -4,7 +4,7 @@
config VMWARE_VMCI
tristate "VMware VMCI Driver"
- depends on X86 && PCI && NET
+ depends on X86 && PCI
help
This is VMware's Virtual Machine Communication Interface. It enables
high-speed communication between host and guest in a virtual
diff --git a/drivers/misc/vmw_vmci/vmci_queue_pair.c b/drivers/misc/vmw_vmci/vmci_queue_pair.c
index d94245dbd765..8ff2e5ee8fb8 100644
--- a/drivers/misc/vmw_vmci/vmci_queue_pair.c
+++ b/drivers/misc/vmw_vmci/vmci_queue_pair.c
@@ -23,7 +23,7 @@
#include <linux/pagemap.h>
#include <linux/sched.h>
#include <linux/slab.h>
-#include <linux/socket.h>
+#include <linux/uio.h>
#include <linux/wait.h>
#include <linux/vmalloc.h>
diff --git a/include/linux/socket.h b/include/linux/socket.h
index 428c37a1f95c..33bf2dfab19d 100644
--- a/include/linux/socket.h
+++ b/include/linux/socket.h
@@ -305,7 +305,6 @@ struct ucred {
extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred);
-extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov,
int offset, int len);
extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
@@ -314,7 +313,6 @@ extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
unsigned int len, __wsum *csump);
extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode);
-extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,
int offset, int len);
extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);
diff --git a/include/linux/uio.h b/include/linux/uio.h
index 629aaf51f30b..c55ce243cc09 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -35,4 +35,7 @@ static inline size_t iov_length(const struct iovec *iov, unsigned long nr_segs)
}
unsigned long iov_shorten(struct iovec *iov, unsigned long nr_segs, size_t to);
+
+int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
+int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len);
#endif
diff --git a/lib/Makefile b/lib/Makefile
index e9c52e1b853a..237721165035 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -9,7 +9,7 @@ endif
lib-y := ctype.o string.o vsprintf.o cmdline.o \
rbtree.o radix-tree.o dump_stack.o timerqueue.o\
- idr.o int_sqrt.o extable.o \
+ idr.o int_sqrt.o extable.o iovec.o \
sha1.o md5.o irq_regs.o reciprocal_div.o argv_split.o \
proportions.o flex_proportions.o prio_heap.o ratelimit.o show_mem.o \
is_single_threaded.o plist.o decompress.o kobject_uevent.o \
diff --git a/lib/iovec.c b/lib/iovec.c
new file mode 100644
index 000000000000..454baa88bf27
--- /dev/null
+++ b/lib/iovec.c
@@ -0,0 +1,53 @@
+#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.
+ *
+ * Note: this modifies the original iovec.
+ */
+
+int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len)
+{
+ while (len > 0) {
+ if (iov->iov_len) {
+ int copy = min_t(unsigned int, iov->iov_len, len);
+ if (copy_to_user(iov->iov_base, kdata, copy))
+ return -EFAULT;
+ kdata += copy;
+ len -= copy;
+ iov->iov_len -= copy;
+ iov->iov_base += copy;
+ }
+ iov++;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(memcpy_toiovec);
diff --git a/net/core/iovec.c b/net/core/iovec.c
index 7e7aeb01de45..de178e462682 100644
--- a/net/core/iovec.c
+++ b/net/core/iovec.c
@@ -75,31 +75,6 @@ int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *a
/*
* Copy kernel to iovec. Returns -EFAULT on error.
- *
- * Note: this modifies the original iovec.
- */
-
-int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len)
-{
- while (len > 0) {
- if (iov->iov_len) {
- int copy = min_t(unsigned int, iov->iov_len, len);
- if (copy_to_user(iov->iov_base, kdata, copy))
- return -EFAULT;
- kdata += copy;
- len -= copy;
- iov->iov_len -= copy;
- iov->iov_base += copy;
- }
- iov++;
- }
-
- return 0;
-}
-EXPORT_SYMBOL(memcpy_toiovec);
-
-/*
- * Copy kernel to iovec. Returns -EFAULT on error.
*/
int memcpy_toiovecend(const struct iovec *iov, unsigned char *kdata,
@@ -125,31 +100,6 @@ int memcpy_toiovecend(const struct iovec *iov, unsigned char *kdata,
EXPORT_SYMBOL(memcpy_toiovecend);
/*
- * 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 iovec from kernel. Returns -EFAULT on error.
*/