diff options
| -rw-r--r-- | net/9p/trans_rdma.c | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/net/9p/trans_rdma.c b/net/9p/trans_rdma.c index 14ad43b5cf89..3533d2a53ab6 100644 --- a/net/9p/trans_rdma.c +++ b/net/9p/trans_rdma.c @@ -139,6 +139,7 @@ struct p9_rdma_opts { int sq_depth; int rq_depth; long timeout; + int privport; }; /* @@ -146,7 +147,10 @@ struct p9_rdma_opts { */ enum { /* Options that take integer arguments */ - Opt_port, Opt_rq_depth, Opt_sq_depth, Opt_timeout, Opt_err, + Opt_port, Opt_rq_depth, Opt_sq_depth, Opt_timeout, + /* Options that take no argument */ + Opt_privport, + Opt_err, }; static match_table_t tokens = { @@ -154,6 +158,7 @@ static match_table_t tokens = { {Opt_sq_depth, "sq=%u"}, {Opt_rq_depth, "rq=%u"}, {Opt_timeout, "timeout=%u"}, + {Opt_privport, "privport"}, {Opt_err, NULL}, }; @@ -175,6 +180,7 @@ static int parse_opts(char *params, struct p9_rdma_opts *opts) opts->sq_depth = P9_RDMA_SQ_DEPTH; opts->rq_depth = P9_RDMA_RQ_DEPTH; opts->timeout = P9_RDMA_TIMEOUT; + opts->privport = 0; if (!params) return 0; @@ -193,13 +199,13 @@ static int parse_opts(char *params, struct p9_rdma_opts *opts) if (!*p) continue; token = match_token(p, tokens, args); - if (token == Opt_err) - continue; - r = match_int(&args[0], &option); - if (r < 0) { - p9_debug(P9_DEBUG_ERROR, - "integer field, but no integer?\n"); - continue; + if ((token != Opt_err) && (token != Opt_privport)) { + r = match_int(&args[0], &option); + if (r < 0) { + p9_debug(P9_DEBUG_ERROR, + "integer field, but no integer?\n"); + continue; + } } switch (token) { case Opt_port: @@ -214,6 +220,9 @@ static int parse_opts(char *params, struct p9_rdma_opts *opts) case Opt_timeout: opts->timeout = option; break; + case Opt_privport: + opts->privport = 1; + break; default: continue; } @@ -607,6 +616,23 @@ static int rdma_cancelled(struct p9_client *client, struct p9_req_t *req) return 0; } +static int p9_rdma_bind_privport(struct p9_trans_rdma *rdma) +{ + struct sockaddr_in cl = { + .sin_family = AF_INET, + .sin_addr.s_addr = htonl(INADDR_ANY), + }; + int port, err = -EINVAL; + + for (port = P9_DEF_MAX_RESVPORT; port >= P9_DEF_MIN_RESVPORT; port--) { + cl.sin_port = htons((ushort)port); + err = rdma_bind_addr(rdma->cm_id, (struct sockaddr *)&cl); + if (err != -EADDRINUSE) + break; + } + return err; +} + /** * trans_create_rdma - Transport method for creating atransport instance * @client: client instance @@ -642,6 +668,16 @@ rdma_create_trans(struct p9_client *client, const char *addr, char *args) /* Associate the client with the transport */ client->trans = rdma; + /* Bind to a privileged port if we need to */ + if (opts.privport) { + err = p9_rdma_bind_privport(rdma); + if (err < 0) { + pr_err("%s (%d): problem binding to privport: %d\n", + __func__, task_pid_nr(current), -err); + goto error; + } + } + /* Resolve the server's address */ rdma->addr.sin_family = AF_INET; rdma->addr.sin_addr.s_addr = in_aton(addr); |