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| author | Chuck Lever <chuck.lever@oracle.com> | 2009-03-19 01:47:14 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2009-03-28 20:56:04 +0100 |
| commit | 126e4bc3b3b446482696377f67a634c76eaf2e9c (patch) | |
| tree | baa96bad06505f212e59b7e1fa557658412979c8 /net/sunrpc/rpcb_clnt.c | |
| parent | SUNRPC: Clean up address type casts in rpcb_v4_register() (diff) | |
| download | linux-126e4bc3b3b446482696377f67a634c76eaf2e9c.tar.xz linux-126e4bc3b3b446482696377f67a634c76eaf2e9c.zip | |
SUNRPC: rpcbind actually interprets r_owner string
RFC 1833 has little to say about the contents of r_owner; it only
specifies that it is a string, and states that it is used to control
who can UNSET an entry.
Our port of rpcbind (from Sun) assumes this string contains a numeric
UID value, not alphabetical or symbolic characters, but checks this
value only for AF_LOCAL RPCB_SET or RPCB_UNSET requests. In all other
cases, rpcbind ignores the contents of the r_owner string.
The reference user space implementation of rpcb_set(3) uses a numeric
UID for all SET/UNSET requests (even via the network) and an empty
string for all other requests. We emulate that behavior here to
maintain bug-for-bug compatibility.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/rpcb_clnt.c')
| -rw-r--r-- | net/sunrpc/rpcb_clnt.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c index 44d0732ba874..d550d0b967db 100644 --- a/net/sunrpc/rpcb_clnt.c +++ b/net/sunrpc/rpcb_clnt.c @@ -63,9 +63,16 @@ enum { * r_owner * * The "owner" is allowed to unset a service in the rpcbind database. - * We always use the following (arbitrary) fixed string. + * + * For AF_LOCAL SET/UNSET requests, rpcbind treats this string as a + * UID which it maps to a local user name via a password lookup. + * In all other cases it is ignored. + * + * For SET/UNSET requests, user space provides a value, even for + * network requests, and GETADDR uses an empty string. We follow + * those precedents here. */ -#define RPCB_OWNER_STRING "rpcb" +#define RPCB_OWNER_STRING "0" #define RPCB_MAXOWNERLEN sizeof(RPCB_OWNER_STRING) static void rpcb_getport_done(struct rpc_task *, void *); @@ -566,7 +573,7 @@ void rpcb_getport_async(struct rpc_task *task) map->r_xprt = xprt_get(xprt); map->r_netid = rpc_peeraddr2str(clnt, RPC_DISPLAY_NETID); map->r_addr = rpc_peeraddr2str(rpcb_clnt, RPC_DISPLAY_UNIVERSAL_ADDR); - map->r_owner = RPCB_OWNER_STRING; /* ignored for GETADDR */ + map->r_owner = ""; map->r_status = -EIO; child = rpcb_call_async(rpcb_clnt, map, proc); |