On Sun, Mar 02, 2014 at 10:38:32AM +0100, Michael Scherer wrote:
> This permit to have 1 nfsd listening on more than 1
> interface for multihomed systems, without having to
> listen on all interfaces and filtering later.
> ---
> utils/nfsd/nfsd.c | 51 +++++++++++++++++++++++++++++++++++----------------
> utils/nfsd/nfsd.man | 3 ++-
> 2 files changed, 37 insertions(+), 17 deletions(-)
>
> diff --git a/utils/nfsd/nfsd.c b/utils/nfsd/nfsd.c
> index edeb621..7ab6fcf 100644
> --- a/utils/nfsd/nfsd.c
> +++ b/utils/nfsd/nfsd.c
> @@ -95,9 +95,10 @@ nfsd_enable_protos(unsigned int *proto4, unsigned int *proto6)
> int
> main(int argc, char **argv)
> {
> - int count = NFSD_NPROC, c, error = 0, portnum = 0, fd, found_one;
> + int count = NFSD_NPROC, c, i, error = 0, portnum = 0, fd, found_one;
> char *p, *progname, *port;
> - char *haddr = NULL;
> + char **haddr = NULL;
> + unsigned int hcounter = 0;
> int socket_up = 0;
> unsigned int minorvers = 0;
> unsigned int minorversset = 0;
> @@ -118,6 +119,13 @@ main(int argc, char **argv)
> exit(1);
> }
>
> + haddr = malloc(sizeof(char*));
> + if (!haddr) {
> + fprintf(stderr, "%s: unable to allocate memory.\n", progname);
> + exit(1);
> + }
> + haddr[0] = NULL;
> +
Checking "man malloc..." realloc(NULL) is the same as malloc(), so you
can just skip this initial allocation (and the "if hcounter" below) and
count on the realloc below doing the right thing when it needs to.
Otherwise, allowing multiple -H options seems like a reasonable thing to
do.
--b.
> xlog_syslog(0);
> xlog_stderr(1);
>
> @@ -127,17 +135,24 @@ main(int argc, char **argv)
> xlog_config(D_ALL, 1);
> break;
> case 'H':
> - /*
> - * for now, this only handles one -H option. Use the
> - * last one specified.
> - */
> - free(haddr);
> - haddr = strdup(optarg);
> - if (!haddr) {
> + if (hcounter) {
> + haddr = realloc(haddr, sizeof(char*) * hcounter+1);
> +
> + if(!haddr) {
> + fprintf(stderr, "%s: unable to allocate "
> + "memory.\n", progname);
> + exit(1);
> + }
> + }
> +
> + haddr[hcounter] = strdup(optarg);
> + if (!haddr[hcounter]) {
> fprintf(stderr, "%s: unable to allocate "
> "memory.\n", progname);
> exit(1);
> }
> +
> + hcounter++;
> break;
> case 'P': /* XXX for nfs-server compatibility */
> case 'p':
> @@ -286,16 +301,18 @@ main(int argc, char **argv)
> * interfaces, these are a no-op.
> */
> nfssvc_setvers(versbits, minorvers, minorversset);
> -
> - error = nfssvc_set_sockets(AF_INET, proto4, haddr, port);
> - if (!error)
> - socket_up = 1;
> +
> + for(i=0; i <= hcounter; i++) {
> + error = nfssvc_set_sockets(AF_INET, proto4, haddr[i], port);
> + if (!error)
> + socket_up = 1;
>
> #ifdef IPV6_SUPPORTED
> - error = nfssvc_set_sockets(AF_INET6, proto6, haddr, port);
> - if (!error)
> - socket_up = 1;
> + error = nfssvc_set_sockets(AF_INET6, proto6, haddr[i], port);
> + if (!error)
> + socket_up = 1;
> #endif /* IPV6_SUPPORTED */
> + }
>
> set_threads:
> /* don't start any threads if unable to hand off any sockets */
> @@ -328,6 +345,8 @@ set_threads:
> xlog(L_ERROR, "error starting threads: errno %d (%m)", errno);
> out:
> free(port);
> + for(i=0; i <= hcounter; i++)
> + free(haddr[i]);
> free(haddr);
> free(progname);
> return (error != 0);
> diff --git a/utils/nfsd/nfsd.man b/utils/nfsd/nfsd.man
> index 7de0867..cdc14ba 100644
> --- a/utils/nfsd/nfsd.man
> +++ b/utils/nfsd/nfsd.man
> @@ -35,7 +35,8 @@ Note that
> .B lockd
> (which performs file locking services for NFS) may still accept
> request on all known network addresses. This may change in future
> -releases of the Linux Kernel.
> +releases of the Linux Kernel. This option can be used multiple time
> +to listen to more than one interface.
> .TP
> .B \-p " or " \-\-port port
> specify a different port to listen on for NFS requests. By default,
> --
> 1.8.5.3
>
> --
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