The fs_location->hosts list is split on colons, but this doesn't work when
IPv6 addresses are used (they contain colons).
This patch adds the function nfsd4_encode_components_esc() to
allow the caller to specify escape characters when splitting on 'sep'.
In order to fix referrals, this patch must be used with the mountd patch
that similarly fixes IPv6 [] escaping.
Signed-off-by: Weston Andros Adamson <dros@xxxxxxxxxx>
---
Sorry, I posted a slightly older version of this patch. This is the one
we want!
fs/nfsd/nfs4xdr.c | 40 +++++++++++++++++++++++++++++++++-------
1 files changed, 33 insertions(+), 7 deletions(-)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 74c00bc..eabd0d9 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1744,15 +1744,16 @@ static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, _
}
/* Encode as an array of strings the string given with components
- * separated @sep.
+ * separated @sep, escaped with esc_enter and esc_exit.
*/
-static __be32 nfsd4_encode_components(char sep, char *components,
- __be32 **pp, int *buflen)
+static __be32 nfsd4_encode_components_esc(char sep, char *components,
+ __be32 **pp, int *buflen,
+ char esc_enter, char esc_exit)
{
__be32 *p = *pp;
__be32 *countp = p;
int strlen, count=0;
- char *str, *end;
+ char *str, *end, *next;
dprintk("nfsd4_encode_components(%s)\n", components);
if ((*buflen -= 4) < 0)
@@ -1760,8 +1761,23 @@ static __be32 nfsd4_encode_components(char sep, char *components,
WRITE32(0); /* We will fill this in with @count later */
end = str = components;
while (*end) {
- for (; *end && (*end != sep); end++)
- ; /* Point to end of component */
+ bool found_esc = false;
+
+ /* try to parse as esc_start, ..., esc_end, sep */
+ if (*str == esc_enter) {
+ for (; *end && (*end != esc_exit); end++)
+ /* find esc_exit or end of string */;
+ next = end + 1;
+ if (*end && (!*next || *next == sep)) {
+ str++;
+ found_esc = true;
+ }
+ }
+
+ if (!found_esc)
+ for (; *end && (*end != sep); end++)
+ /* find sep or end of string */;
+
strlen = end - str;
if (strlen) {
if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
@@ -1780,6 +1796,15 @@ static __be32 nfsd4_encode_components(char sep, char *components,
return 0;
}
+/* Encode as an array of strings the string given with components
+ * separated @sep.
+ */
+static __be32 nfsd4_encode_components(char sep, char *components,
+ __be32 **pp, int *buflen)
+{
+ return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
+}
+
/*
* encode a location element of a fs_locations structure
*/
@@ -1789,7 +1814,8 @@ static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
__be32 status;
__be32 *p = *pp;
- status = nfsd4_encode_components(':', location->hosts, &p, buflen);
+ status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
+ '[', ']');
if (status)
return status;
status = nfsd4_encode_components('/', location->path, &p, buflen);
--
1.7.4.4
--
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