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Date: Fri, 6 May 2011 18:35:32 +0530
From: Prem Karat <prem.karat@...ux.vnet.ibm.com>
To: v9fs-developer@...ts.sourceforge.net
Cc: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] 9p: Clean up get_protocol_version to use strcmp
9p: Clean-up get_protocol_version() to use strcmp
Signed-off-by: Prem Karat <prem.karat@...ux.vnet.ibm.com>
---
include/net/9p/client.h | 6 ++--
include/net/9p/transport.h | 2 +-
net/9p/client.c | 47 ++++++++++++++++++++++++++++++-------------
net/9p/mod.c | 4 +-
4 files changed, 39 insertions(+), 20 deletions(-)
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 051a99f..0415ba1 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -36,9 +36,9 @@
*/
enum p9_proto_versions{
- p9_proto_legacy = 0,
- p9_proto_2000u = 1,
- p9_proto_2000L = 2,
+ p9_proto_legacy,
+ p9_proto_2000u,
+ p9_proto_2000L,
};
diff --git a/include/net/9p/transport.h b/include/net/9p/transport.h
index 8f08c73..d32b472 100644
--- a/include/net/9p/transport.h
+++ b/include/net/9p/transport.h
@@ -66,7 +66,7 @@ struct p9_trans_module {
void v9fs_register_trans(struct p9_trans_module *m);
void v9fs_unregister_trans(struct p9_trans_module *m);
-struct p9_trans_module *v9fs_get_trans_by_name(const substring_t *name);
+struct p9_trans_module *v9fs_get_trans_by_name(char *s);
struct p9_trans_module *v9fs_get_default_trans(void);
void v9fs_put_trans(struct p9_trans_module *m);
#endif /* NET_9P_TRANSPORT_H */
diff --git a/net/9p/client.c b/net/9p/client.c
index 7736774..4f51250 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -72,23 +72,22 @@ inline int p9_is_proto_dotu(struct p9_client *clnt)
EXPORT_SYMBOL(p9_is_proto_dotu);
/* Interpret mount option for protocol version */
-static int get_protocol_version(const substring_t *name)
+static int get_protocol_version(char *s)
{
int version = -EINVAL;
- if (!strncmp("9p2000", name->from, name->to-name->from)) {
+ if (!strcmp(s, "9p2000")) {
version = p9_proto_legacy;
P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n");
- } else if (!strncmp("9p2000.u", name->from, name->to-name->from)) {
+ } else if (!strcmp(s, "9p2000.u")) {
version = p9_proto_2000u;
P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n");
- } else if (!strncmp("9p2000.L", name->from, name->to-name->from)) {
+ } else if (!strcmp(s, "9p2000.L")) {
version = p9_proto_2000L;
P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n");
- } else {
- P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ",
- name->from);
- }
+ } else
+ printk(KERN_INFO "9p: Unknown protocol version %s.\n", s);
+
return version;
}
@@ -109,6 +108,7 @@ static int parse_opts(char *opts, struct p9_client *clnt)
char *p;
substring_t args[MAX_OPT_ARGS];
int option;
+ char *s;
int ret = 0;
clnt->proto_version = p9_proto_2000u;
@@ -144,22 +144,41 @@ static int parse_opts(char *opts, struct p9_client *clnt)
clnt->msize = option;
break;
case Opt_trans:
- clnt->trans_mod = v9fs_get_trans_by_name(&args[0]);
- if(clnt->trans_mod == NULL) {
+ s = match_strdup(&args[0]);
+ if (!s) {
+ ret = -ENOMEM;
P9_DPRINTK(P9_DEBUG_ERROR,
- "Could not find request transport: %s\n",
- (char *) &args[0]);
+ "problem allocating copy of trans arg\n");
+ goto free_and_return;
+ }
+ clnt->trans_mod = v9fs_get_trans_by_name(s);
+ if (clnt->trans_mod == NULL) {
+ printk(KERN_INFO
+ "9p: Could not find "
+ "request transport: %s\n", s);
ret = -EINVAL;
+ kfree(s);
goto free_and_return;
}
+ kfree(s);
break;
case Opt_legacy:
clnt->proto_version = p9_proto_legacy;
break;
case Opt_version:
- ret = get_protocol_version(&args[0]);
- if (ret == -EINVAL)
+ s = match_strdup(&args[0]);
+ if (!s) {
+ ret = -ENOMEM;
+ P9_DPRINTK(P9_DEBUG_ERROR,
+ "problem allocating copy of version arg\n");
+ goto free_and_return;
+ }
+ ret = get_protocol_version(s);
+ if (ret == -EINVAL) {
+ kfree(s);
goto free_and_return;
+ }
+ kfree(s);
clnt->proto_version = ret;
break;
default:
diff --git a/net/9p/mod.c b/net/9p/mod.c
index cf8a412..40b06ac 100644
--- a/net/9p/mod.c
+++ b/net/9p/mod.c
@@ -80,14 +80,14 @@ EXPORT_SYMBOL(v9fs_unregister_trans);
* @name: string identifying transport
*
*/
-struct p9_trans_module *v9fs_get_trans_by_name(const substring_t *name)
+struct p9_trans_module *v9fs_get_trans_by_name(char *s)
{
struct p9_trans_module *t, *found = NULL;
spin_lock(&v9fs_trans_lock);
list_for_each_entry(t, &v9fs_trans_list, list)
- if (strncmp(t->name, name->from, name->to-name->from) == 0 &&
+ if (strcmp(t->name, s) == 0 &&
try_module_get(t->owner)) {
found = t;
break;
--
1.7.4
--
Cheers,
Prem
Linux Technology Center,
IBM Systems & Technology Labs
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