Merge branch 'for-linus' of git://git.samba.org/sfrench/cifs-2.6

Pull CIFS fixes from Steve French.

* 'for-linus' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: reinstate the forcegid option
  Convert properly UTF-8 to UTF-16
  [CIFS] WARN_ON_ONCE if kernel_sendmsg() returns -ENOSPC

3 files changed, 37 insertions, 0 deletions

diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
index 53cf2aabce87..71d5d0a5f6b2 100644
--- a/fs/cifs/cifs_unicode.c
+++ b/fs/cifs/cifs_unicode.c
@@ -203,6 +203,27 @@ cifs_strtoUTF16(__le16 *to, const char *from, int len,
         int i;
         wchar_t wchar_to; /* needed to quiet sparse */
 
+        /* special case for utf8 to handle no plane0 chars */
+        if (!strcmp(codepage->charset, "utf8")) {
+                /*
+                 * convert utf8 -> utf16, we assume we have enough space
+                 * as caller should have assumed conversion does not overflow
+                 * in destination len is length in wchar_t units (16bits)
+                 */
+                i  = utf8s_to_utf16s(from, len, UTF16_LITTLE_ENDIAN,
+                                       (wchar_t *) to, len);
+
+                /* if success terminate and exit */
+                if (i >= 0)
+                        goto success;
+                /*
+                 * if fails fall back to UCS encoding as this
+                 * function should not return negative values
+                 * currently can fail only if source contains
+                 * invalid encoded characters
+                 */
+        }
+
         for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
                 charlen = codepage->char2uni(from, len, &wchar_to);
                 if (charlen < 1) {
@@ -215,6 +236,7 @@ cifs_strtoUTF16(__le16 *to, const char *from, int len,
                 put_unaligned_le16(wchar_to, &to[i]);
         }
 
+success:
         put_unaligned_le16(0, &to[i]);
         return i;
 }
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 2fdbe08a7a23..5c670b998ffb 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -67,6 +67,7 @@ enum {
         /* Mount options that take no arguments */
         Opt_user_xattr, Opt_nouser_xattr,
         Opt_forceuid, Opt_noforceuid,
+        Opt_forcegid, Opt_noforcegid,
         Opt_noblocksend, Opt_noautotune,
         Opt_hard, Opt_soft, Opt_perm, Opt_noperm,
         Opt_mapchars, Opt_nomapchars, Opt_sfu,
@@ -117,6 +118,8 @@ static const match_table_t cifs_mount_option_tokens = {
         { Opt_nouser_xattr, "nouser_xattr" },
         { Opt_forceuid, "forceuid" },
         { Opt_noforceuid, "noforceuid" },
+        { Opt_forcegid, "forcegid" },
+        { Opt_noforcegid, "noforcegid" },
         { Opt_noblocksend, "noblocksend" },
         { Opt_noautotune, "noautotune" },
         { Opt_hard, "hard" },
@@ -1195,6 +1198,12 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
                 case Opt_noforceuid:
                         override_uid = 0;
                         break;
+                case Opt_forcegid:
+                        override_gid = 1;
+                        break;
+                case Opt_noforcegid:
+                        override_gid = 0;
+                        break;
                 case Opt_noblocksend:
                         vol->noblocksnd = 1;
                         break;
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 2126ab185045..76d974c952fe 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -183,6 +183,12 @@ smb_send_kvec(struct TCP_Server_Info *server, struct kvec *iov, size_t n_vec,
                 rc = kernel_sendmsg(ssocket, &smb_msg, &iov[first_vec],
                                     n_vec - first_vec, remaining);
                 if (rc == -ENOSPC || rc == -EAGAIN) {
+                        /*
+                         * Catch if a low level driver returns -ENOSPC. This
+                         * WARN_ON will be removed by 3.10 if no one reports
+                         * seeing this.
+                         */
+                        WARN_ON_ONCE(rc == -ENOSPC);
                         i++;
                         if (i >= 14 || (!server->noblocksnd && (i > 2))) {
                                 cERROR(1, "sends on sock %p stuck for 15 "