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9p: Implement show_options

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Implement the show_options superblock op for 9p as part of a bid to get
rid of s_options and generic_show_options() to make it easier to implement
a context-based mount where the mount options can be passed individually
over a file descriptor.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Eric Van Hensbergen <ericvh@gmail.com>
cc: Ron Minnich <rminnich@sandia.gov>
cc: Latchesar Ionkov <lucho@ionkov.net>
cc: v9fs-developer@lists.sourceforge.net
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells
2017-07-05 16:25:37 +01:00
committed by Al Viro
parent 86a1da6d30
commit c4fac91004
8 changed files with 161 additions and 10 deletions
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31
net/9p/trans_rdma.c
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@@ -43,6 +43,7 @@
#include <linux/parser.h>
#include <linux/semaphore.h>
#include <linux/slab.h>
#include <linux/seq_file.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>
#include <net/9p/transport.h>
@@ -70,6 +71,8 @@
* @dm_mr: DMA Memory Region pointer
* @lkey: The local access only memory region key
* @timeout: Number of uSecs to wait for connection management events
* @privport: Whether a privileged port may be used
* @port: The port to use
* @sq_depth: The depth of the Send Queue
* @sq_sem: Semaphore for the SQ
* @rq_depth: The depth of the Receive Queue.
@@ -95,6 +98,8 @@ struct p9_trans_rdma {
struct ib_qp *qp;
struct ib_cq *cq;
long timeout;
bool privport;
u16 port;
int sq_depth;
struct semaphore sq_sem;
int rq_depth;
@@ -133,10 +138,10 @@ struct p9_rdma_context {
*/
struct p9_rdma_opts {
short port;
bool privport;
int sq_depth;
int rq_depth;
long timeout;
int privport;
};
/*
@@ -159,6 +164,23 @@ static match_table_t tokens = {
{Opt_err, NULL},
};
static int p9_rdma_show_options(struct seq_file *m, struct p9_client *clnt)
{
struct p9_trans_rdma *rdma = clnt->trans;
if (rdma->port != P9_PORT)
seq_printf(m, ",port=%u", rdma->port);
if (rdma->sq_depth != P9_RDMA_SQ_DEPTH)
seq_printf(m, ",sq=%u", rdma->sq_depth);
if (rdma->rq_depth != P9_RDMA_RQ_DEPTH)
seq_printf(m, ",rq=%u", rdma->rq_depth);
if (rdma->timeout != P9_RDMA_TIMEOUT)
seq_printf(m, ",timeout=%lu", rdma->timeout);
if (rdma->privport)
seq_puts(m, ",privport");
return 0;
}
/**
* parse_opts - parse mount options into rdma options structure
* @params: options string passed from mount
@@ -177,7 +199,7 @@ 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;
opts->privport = false;
if (!params)
return 0;
@@ -218,7 +240,7 @@ static int parse_opts(char *params, struct p9_rdma_opts *opts)
opts->timeout = option;
break;
case Opt_privport:
opts->privport = 1;
opts->privport = true;
break;
default:
continue;
@@ -560,6 +582,8 @@ static struct p9_trans_rdma *alloc_rdma(struct p9_rdma_opts *opts)
if (!rdma)
return NULL;
rdma->port = opts->port;
rdma->privport = opts->privport;
rdma->sq_depth = opts->sq_depth;
rdma->rq_depth = opts->rq_depth;
rdma->timeout = opts->timeout;
@@ -733,6 +757,7 @@ static struct p9_trans_module p9_rdma_trans = {
.request = rdma_request,
.cancel = rdma_cancel,
.cancelled = rdma_cancelled,
.show_options = p9_rdma_show_options,
};
/**