NFSv4: convert fs-locations-components to conform to RFC3530
Use component4-style formats for decoding list of servers and pathnames in
fs_locations.
Signed-off-by: Manoj Naik <manoj@almaden.ibm.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 7add313..f6a1ea7 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -2377,7 +2377,43 @@
return status;
}
-static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fs_locations *res)
+static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
+{
+ int n;
+ uint32_t *p;
+ int status = 0;
+
+ READ_BUF(4);
+ READ32(n);
+ if (n <= 0)
+ goto out_eio;
+ dprintk("path ");
+ path->ncomponents = 0;
+ while (path->ncomponents < n) {
+ struct nfs4_string *component = &path->components[path->ncomponents];
+ status = decode_opaque_inline(xdr, &component->len, &component->data);
+ if (unlikely(status != 0))
+ goto out_eio;
+ if (path->ncomponents != n)
+ dprintk("/");
+ dprintk("%s", component->data);
+ if (path->ncomponents < NFS4_PATHNAME_MAXCOMPONENTS)
+ path->ncomponents++;
+ else {
+ dprintk("cannot parse %d components in path\n", n);
+ goto out_eio;
+ }
+ }
+out:
+ dprintk("\n");
+ return status;
+out_eio:
+ dprintk(" status %d", status);
+ status = -EIO;
+ goto out;
+}
+
+static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
{
int n;
uint32_t *p;
@@ -2388,7 +2424,8 @@
status = 0;
if (unlikely(!(bitmap[0] & FATTR4_WORD0_FS_LOCATIONS)))
goto out;
- status = decode_opaque_inline(xdr, &res->fs_pathlen, &res->fs_path);
+ dprintk("%s: fsroot ", __FUNCTION__);
+ status = decode_pathname(xdr, &res->fs_path);
if (unlikely(status != 0))
goto out;
READ_BUF(4);
@@ -2397,15 +2434,40 @@
goto out_eio;
res->nlocations = 0;
while (res->nlocations < n) {
- struct nfs_fs_location *loc = &res->locations[res->nlocations];
+ int m;
+ struct nfs4_fs_location *loc = &res->locations[res->nlocations];
- status = decode_opaque_inline(xdr, &loc->serverlen, &loc->server);
+ READ_BUF(4);
+ READ32(m);
+ if (m <= 0)
+ goto out_eio;
+
+ loc->nservers = 0;
+ dprintk("%s: servers ", __FUNCTION__);
+ while (loc->nservers < m) {
+ struct nfs4_string *server = &loc->servers[loc->nservers];
+ status = decode_opaque_inline(xdr, &server->len, &server->data);
+ if (unlikely(status != 0))
+ goto out_eio;
+ dprintk("%s ", server->data);
+ if (loc->nservers < NFS4_FS_LOCATION_MAXSERVERS)
+ loc->nservers++;
+ else {
+ int i;
+ dprintk("%s: using first %d of %d servers returned for location %d\n", __FUNCTION__, NFS4_FS_LOCATION_MAXSERVERS, m, res->nlocations);
+ for (i = loc->nservers; i < m; i++) {
+ int len;
+ char *data;
+ status = decode_opaque_inline(xdr, &len, &data);
+ if (unlikely(status != 0))
+ goto out_eio;
+ }
+ }
+ }
+ status = decode_pathname(xdr, &loc->rootpath);
if (unlikely(status != 0))
goto out_eio;
- status = decode_opaque_inline(xdr, &loc->rootpathlen, &loc->rootpath);
- if (unlikely(status != 0))
- goto out_eio;
- if (res->nlocations < NFS_FS_LOCATIONS_MAXENTRIES)
+ if (res->nlocations < NFS4_FS_LOCATIONS_MAXENTRIES)
res->nlocations++;
}
out:
@@ -2948,7 +3010,7 @@
if ((status = decode_attr_fileid(xdr, bitmap, &fattr->fileid)) != 0)
goto xdr_error;
if ((status = decode_attr_fs_locations(xdr, bitmap, container_of(fattr,
- struct nfs_fs_locations,
+ struct nfs4_fs_locations,
fattr))) != 0)
goto xdr_error;
if ((status = decode_attr_mode(xdr, bitmap, &fattr->mode)) != 0)
@@ -4297,7 +4359,7 @@
/*
* FS_LOCATIONS request
*/
-static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, uint32_t *p, struct nfs_fs_locations *res)
+static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, uint32_t *p, struct nfs4_fs_locations *res)
{
struct xdr_stream xdr;
struct compound_hdr hdr;