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-rw-r--r--fs/cifs/CHANGES5
-rw-r--r--fs/cifs/netmisc.c40
2 files changed, 39 insertions, 6 deletions
diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index c65c9da863f3..6d3e736612ba 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -14,7 +14,10 @@ bigendian architectures. Fix possible memory corruption when
EAGAIN returned on kern_recvmsg. Return better error if server
requires packet signing but client has disabled it. When mounted
with cifsacl mount option - mode bits are approximated based
-on the contents of the files ACL.
+on the contents of the ACL of the file or directory. When cifs
+mount helper is missing convert make sure that UNC name
+has backslash (not forward slash) between ip address of server
+and the share name.
Version 1.50
------------
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index 4d35c034755a..e1704da43836 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -132,6 +132,34 @@ static const struct smb_to_posix_error mapping_table_ERRHRD[] = {
{0, 0}
};
+
+/* if the mount helper is missing we need to reverse the 1st slash
+ from '/' to backslash in order to format the UNC properly for
+ ip address parsing and for tree connect (unless the user
+ remembered to put the UNC name in properly). Fortunately we do
+ not have to call this twice (we check for IPv4 addresses
+ first, so it is already converted by the time we
+ try IPv6 addresses */
+static int canonicalize_unc(char *cp)
+{
+ int i;
+
+ for (i = 0; i <= 46 /* INET6_ADDRSTRLEN */ ; i++) {
+ if (cp[i] == 0)
+ break;
+ if (cp[i] == '\\')
+ break;
+ if (cp[i] == '/') {
+#ifdef CONFIG_CIFS_DEBUG2
+ cFYI(1, ("change slash to backslash in malformed UNC"));
+#endif
+ cp[i] = '\\';
+ return 1;
+ }
+ }
+ return 0;
+}
+
/* Convert string containing dotted ip address to binary form */
/* returns 0 if invalid address */
@@ -141,11 +169,13 @@ cifs_inet_pton(int address_family, char *cp, void *dst)
int ret = 0;
/* calculate length by finding first slash or NULL */
- /* BB Should we convert '/' slash to '\' here since it seems already
- * done before this */
- if ( address_family == AF_INET ) {
- ret = in4_pton(cp, -1 /* len */, dst , '\\', NULL);
- } else if ( address_family == AF_INET6 ) {
+ if (address_family == AF_INET) {
+ ret = in4_pton(cp, -1 /* len */, dst, '\\', NULL);
+ if (ret == 0) {
+ if (canonicalize_unc(cp))
+ ret = in4_pton(cp, -1, dst, '\\', NULL);
+ }
+ } else if (address_family == AF_INET6) {
ret = in6_pton(cp, -1 /* len */, dst , '\\', NULL);
}
#ifdef CONFIG_CIFS_DEBUG2