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authorDavid Howells <dhowells@redhat.com>2017-11-02 18:27:51 +0300
committerDavid Howells <dhowells@redhat.com>2017-11-13 18:38:19 +0300
commitbf99a53ce22a29d64d3190093edf52f1d44d53b3 (patch)
treee7544749643200b92e9d53dd09b28ec0a73a6d07 /fs/afs/volume.c
parentd2ddc776a4581d900fc3bdc7803b403daae64d88 (diff)
downloadlinux-bf99a53ce22a29d64d3190093edf52f1d44d53b3.tar.xz
afs: Make use of the YFS service upgrade to fully support IPv6
YFS VL servers offer an upgraded Volume Location service that can return IPv6 addresses to fileservers and volume servers in addition to IPv4 addresses using the YFSVL.GetEndpoints operation which we should use if it's available. To this end: (1) Make rxrpc_kernel_recv_data() return the call's current service ID so that the caller can detect service upgrade and see what the service was upgraded to. (2) When we see a VL server address we haven't seen before, send a VL.GetCapabilities operation to it with the service upgrade bit set. If we get an upgrade to the YFS VL service, change the service ID in the address list for that address to use the upgraded service and set a flag to note that this appears to be a YFS-compatible server. (3) If, when a server's addresses are being looked up, we note that we previously detected a YFS-compatible server, then send the YFSVL.GetEndpoints operation rather than VL.GetAddrsU. (4) Build a fileserver address list from the reply of YFSVL.GetEndpoints, including both IPv4 and IPv6 addresses. Volume server addresses are discarded. (5) The address list is sorted by address and port now, instead of just address. This allows multiple servers on the same host sitting on different ports. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs/volume.c')
-rw-r--r--fs/afs/volume.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 2295dd4f9b15..684c48293353 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -124,6 +124,22 @@ static struct afs_vldb_entry *afs_vl_lookup_vldb(struct afs_cell *cell,
return ERR_PTR(ret);
while (afs_iterate_addresses(&ac)) {
+ if (!test_bit(ac.index, &ac.alist->probed)) {
+ ret = afs_vl_get_capabilities(cell->net, &ac, key);
+ switch (ret) {
+ case VL_SERVICE:
+ clear_bit(ac.index, &ac.alist->yfs);
+ set_bit(ac.index, &ac.alist->probed);
+ ac.addr->srx_service = ret;
+ break;
+ case YFS_VL_SERVICE:
+ set_bit(ac.index, &ac.alist->yfs);
+ set_bit(ac.index, &ac.alist->probed);
+ ac.addr->srx_service = ret;
+ break;
+ }
+ }
+
vldb = afs_vl_get_entry_by_name_u(cell->net, &ac, key,
volname, volnamesz);
switch (ac.error) {