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path: root/fs/nfs/pnfs_nfs.c
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Diffstat (limited to 'fs/nfs/pnfs_nfs.c')
-rw-r--r--fs/nfs/pnfs_nfs.c149
1 files changed, 149 insertions, 0 deletions
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index 3bb2b74cf600..81ec449138a8 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -9,6 +9,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
+#include <linux/sunrpc/addr.h>
#include "internal.h"
#include "pnfs.h"
@@ -532,3 +533,151 @@ out:
return ds;
}
EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_add);
+
+/*
+ * Currently only supports ipv4, ipv6 and one multi-path address.
+ */
+struct nfs4_pnfs_ds_addr *
+nfs4_decode_mp_ds_addr(struct net *net, struct xdr_stream *xdr, gfp_t gfp_flags)
+{
+ struct nfs4_pnfs_ds_addr *da = NULL;
+ char *buf, *portstr;
+ __be16 port;
+ int nlen, rlen;
+ int tmp[2];
+ __be32 *p;
+ char *netid, *match_netid;
+ size_t len, match_netid_len;
+ char *startsep = "";
+ char *endsep = "";
+
+
+ /* r_netid */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_err;
+ nlen = be32_to_cpup(p++);
+
+ p = xdr_inline_decode(xdr, nlen);
+ if (unlikely(!p))
+ goto out_err;
+
+ netid = kmalloc(nlen+1, gfp_flags);
+ if (unlikely(!netid))
+ goto out_err;
+
+ netid[nlen] = '\0';
+ memcpy(netid, p, nlen);
+
+ /* r_addr: ip/ip6addr with port in dec octets - see RFC 5665 */
+ p = xdr_inline_decode(xdr, 4);
+ if (unlikely(!p))
+ goto out_free_netid;
+ rlen = be32_to_cpup(p);
+
+ p = xdr_inline_decode(xdr, rlen);
+ if (unlikely(!p))
+ goto out_free_netid;
+
+ /* port is ".ABC.DEF", 8 chars max */
+ if (rlen > INET6_ADDRSTRLEN + IPV6_SCOPE_ID_LEN + 8) {
+ dprintk("%s: Invalid address, length %d\n", __func__,
+ rlen);
+ goto out_free_netid;
+ }
+ buf = kmalloc(rlen + 1, gfp_flags);
+ if (!buf) {
+ dprintk("%s: Not enough memory\n", __func__);
+ goto out_free_netid;
+ }
+ buf[rlen] = '\0';
+ memcpy(buf, p, rlen);
+
+ /* replace port '.' with '-' */
+ portstr = strrchr(buf, '.');
+ if (!portstr) {
+ dprintk("%s: Failed finding expected dot in port\n",
+ __func__);
+ goto out_free_buf;
+ }
+ *portstr = '-';
+
+ /* find '.' between address and port */
+ portstr = strrchr(buf, '.');
+ if (!portstr) {
+ dprintk("%s: Failed finding expected dot between address and "
+ "port\n", __func__);
+ goto out_free_buf;
+ }
+ *portstr = '\0';
+
+ da = kzalloc(sizeof(*da), gfp_flags);
+ if (unlikely(!da))
+ goto out_free_buf;
+
+ INIT_LIST_HEAD(&da->da_node);
+
+ if (!rpc_pton(net, buf, portstr-buf, (struct sockaddr *)&da->da_addr,
+ sizeof(da->da_addr))) {
+ dprintk("%s: error parsing address %s\n", __func__, buf);
+ goto out_free_da;
+ }
+
+ portstr++;
+ sscanf(portstr, "%d-%d", &tmp[0], &tmp[1]);
+ port = htons((tmp[0] << 8) | (tmp[1]));
+
+ switch (da->da_addr.ss_family) {
+ case AF_INET:
+ ((struct sockaddr_in *)&da->da_addr)->sin_port = port;
+ da->da_addrlen = sizeof(struct sockaddr_in);
+ match_netid = "tcp";
+ match_netid_len = 3;
+ break;
+
+ case AF_INET6:
+ ((struct sockaddr_in6 *)&da->da_addr)->sin6_port = port;
+ da->da_addrlen = sizeof(struct sockaddr_in6);
+ match_netid = "tcp6";
+ match_netid_len = 4;
+ startsep = "[";
+ endsep = "]";
+ break;
+
+ default:
+ dprintk("%s: unsupported address family: %u\n",
+ __func__, da->da_addr.ss_family);
+ goto out_free_da;
+ }
+
+ if (nlen != match_netid_len || strncmp(netid, match_netid, nlen)) {
+ dprintk("%s: ERROR: r_netid \"%s\" != \"%s\"\n",
+ __func__, netid, match_netid);
+ goto out_free_da;
+ }
+
+ /* save human readable address */
+ len = strlen(startsep) + strlen(buf) + strlen(endsep) + 7;
+ da->da_remotestr = kzalloc(len, gfp_flags);
+
+ /* NULL is ok, only used for dprintk */
+ if (da->da_remotestr)
+ snprintf(da->da_remotestr, len, "%s%s%s:%u", startsep,
+ buf, endsep, ntohs(port));
+
+ dprintk("%s: Parsed DS addr %s\n", __func__, da->da_remotestr);
+ kfree(buf);
+ kfree(netid);
+ return da;
+
+out_free_da:
+ kfree(da);
+out_free_buf:
+ dprintk("%s: Error parsing DS addr: %s\n", __func__, buf);
+ kfree(buf);
+out_free_netid:
+ kfree(netid);
+out_err:
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(nfs4_decode_mp_ds_addr);