Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "Mostly minor fixes this time around.  The highlights include:

   - iscsi-target CHAP authentication fixes to enforce explicit key
     values (Tejas Vaykole + rahul.rane)
   - fix a long-standing OOPs in target-core when a alua configfs
     attribute is accessed after port symlink has been removed.
     (Sebastian Herbszt)
   - fix a v3.10.y iscsi-target regression causing the login reject
     status class/detail to be ignored (Christoph Vu-Brugier)
   - fix a v3.10.y iscsi-target regression to avoid rejecting an
     existing ITT during Data-Out when data-direction is wrong (Santosh
     Kulkarni + Arshad Hussain)
   - fix a iscsi-target related shutdown deadlock on UP kernels (Mikulas
     Patocka)
   - fix a v3.16-rc1 build issue with vhost-scsi + !CONFIG_NET (MST)"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iscsi-target: fix iscsit_del_np deadlock on unload
  iovec: move memcpy_from/toiovecend to lib/iovec.c
  iscsi-target: Avoid rejecting incorrect ITT for Data-Out
  tcm_loop: Fix memory leak in tcm_loop_submission_work error path
  iscsi-target: Explicily clear login response PDU in exception path
  target: Fix left-over se_lun->lun_sep pointer OOPs
  iscsi-target; Enforce 1024 byte maximum for CHAP_C key value
  iscsi-target: Convert chap_server_compute_md5 to use kstrtoul

1 files changed, 55 insertions, 0 deletions

diff --git a/lib/iovec.c b/lib/iovec.c
index 454baa88bf27..7a7c2da4cddf 100644
--- a/lib/iovec.c
+++ b/lib/iovec.c
@@ -51,3 +51,58 @@ int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len)
         return 0;
 }
 EXPORT_SYMBOL(memcpy_toiovec);
+
+/*
+ *      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)
+{
+        /* 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);