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| author | Chuck Lever <chuck.lever@oracle.com> | 2008-03-14 19:25:39 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-03-19 23:00:57 +0100 |
| commit | 496951743100b2d2ccd8b268257e79425e489851 (patch) | |
| tree | e52e804c132f8322699354640c7fee7541b9a317 /fs/lockd/mon.c | |
| parent | lockd: Ensure NSM strings aren't longer than protocol allows (diff) | |
| download | linux-496951743100b2d2ccd8b268257e79425e489851.tar.xz linux-496951743100b2d2ccd8b268257e79425e489851.zip | |
lockd: refactor SM_MON mon_name argument encoder
Clean up: introduce a new XDR encoder specifically for the mon_name
argument of SM_MON requests. This will be updated later to support IPv6
addresses in addition to IPv4 addresses.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/lockd/mon.c')
| -rw-r--r-- | fs/lockd/mon.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c index 84fd84cb67b7..87bd4e4d65dd 100644 --- a/fs/lockd/mon.c +++ b/fs/lockd/mon.c @@ -18,6 +18,8 @@ #define NLMDBG_FACILITY NLMDBG_MONITOR +#define XDR_ADDRBUF_LEN (20) + static struct rpc_clnt * nsm_create(void); static struct rpc_program nsm_program; @@ -158,6 +160,29 @@ static __be32 *xdr_encode_nsm_string(__be32 *p, char *string) return xdr_encode_opaque(p, string, len); } +/* + * "mon_name" specifies the host to be monitored. + * + * Linux uses a text version of the IP address of the remote + * host as the host identifier (the "mon_name" argument). + * + * Linux statd always looks up the canonical hostname first for + * whatever remote hostname it receives, so this works alright. + */ +static __be32 *xdr_encode_mon_name(__be32 *p, struct nsm_args *argp) +{ + char buffer[XDR_ADDRBUF_LEN + 1]; + char *name = argp->mon_name; + + if (!nsm_use_hostnames) { + snprintf(buffer, XDR_ADDRBUF_LEN, + NIPQUAD_FMT, NIPQUAD(argp->addr)); + name = buffer; + } + + return xdr_encode_nsm_string(p, name); +} + static __be32 * xdr_encode_common(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp) { |