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authorSteve French <sfrench@us.ibm.com>2007-11-01 02:12:10 +0000
committerSteve French <sfrench@us.ibm.com>2007-11-01 02:12:10 +0000
commit1fb64bfc45b9ee5092b72474a5df216b8a0c7ff9 (patch)
treebd3db1436f5b021e6052dcf73d2e7fd147fa73a6 /fs
parent953f868138dbf4300196780379476ab9f07f263a (diff)
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[CIFS] when mount helper missing fix slash wrong direction in share
Kernel bugzilla bug #9228 If mount helper (mount.cifs) missing, mounts with form like //10.11.12.13/c$ would not work (only mounts with slash e.g. //10.11.12.13\\c$ would work) due to problem with slash supposed to be converted to backslash by the mount helper (which is not there). If we fail on converting an IPv4 address in in4_pton then try to canonicalize the first slash (ie between sharename and host ip address) if necessary. If we have to retry to check for IPv6 address the slash is already converted if necessary. Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs')
-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