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From: =?utf-8?q?Ferenc_W=C3=A1gner?= <wferi@niif.hu>
To: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org, wferi@niif.hu
Subject: [PATCH 1/3] Remove trailing NULs from network bonding sysfs interface.
Date: Wed, 28 Nov 2007 01:49:54 +0100	[thread overview]
Message-ID: <871wabkxcd.fsf@szonett.ki.iif.hu> (raw)

Also remove trailing spaces from multivalued files.

This fixes output like for example:

$ od -c /sys/class/net/bond0/bonding/slaves
0000000   e   t   h   -   l   e   f   t       e   t   h   -   r   i   g
0000020   h   t      \n  \0
0000025

It mostly entails deleting '+1'-s after sprintf() calls: the return value
of sprintf is the number of characters printed, without the closing NUL,
ie. exactly what the sysfs interface requires.  The three multivalue
cases are different, because they also have to swallow back a trailing
space.

Signed-off-by: Ferenc Wágner <wferi@niif.hu>
---
 drivers/net/bonding/bond_sysfs.c |   66 +++++++++++++++++--------------------
 1 files changed, 30 insertions(+), 36 deletions(-)

diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c
index b29330d..a3f1b4a 100644
--- a/drivers/net/bonding/bond_sysfs.c
+++ b/drivers/net/bonding/bond_sysfs.c
@@ -86,14 +86,13 @@ static ssize_t bonding_show_bonds(struct class *cls, char *buffer)
 			/* not enough space for another interface name */
 			if ((PAGE_SIZE - res) > 10)
 				res = PAGE_SIZE - 10;
-			res += sprintf(buffer + res, "++more++");
+			res += sprintf(buffer + res, "++more++ ");
 			break;
 		}
 		res += sprintf(buffer + res, "%s ",
 			       bond->dev->name);
 	}
-	res += sprintf(buffer + res, "\n");
-	res++;
+	if (res) buffer[res-1] = '\n'; /* eat the leftover space */
 	up_read(&(bonding_rwsem));
 	return res;
 }
@@ -235,14 +234,13 @@ static ssize_t bonding_show_slaves(struct device *d,
 			/* not enough space for another interface name */
 			if ((PAGE_SIZE - res) > 10)
 				res = PAGE_SIZE - 10;
-			res += sprintf(buf + res, "++more++");
+			res += sprintf(buf + res, "++more++ ");
 			break;
 		}
 		res += sprintf(buf + res, "%s ", slave->dev->name);
 	}
 	read_unlock(&bond->lock);
-	res += sprintf(buf + res, "\n");
-	res++;
+	if (res) buf[res-1] = '\n'; /* eat the leftover space */
 	return res;
 }
 
@@ -406,7 +404,7 @@ static ssize_t bonding_show_mode(struct device *d,
 
 	return sprintf(buf, "%s %d\n",
 			bond_mode_tbl[bond->params.mode].modename,
-			bond->params.mode) + 1;
+			bond->params.mode);
 }
 
 static ssize_t bonding_store_mode(struct device *d,
@@ -463,11 +461,11 @@ static ssize_t bonding_show_xmit_hash(struct device *d,
 	if ((bond->params.mode != BOND_MODE_XOR) &&
 	    (bond->params.mode != BOND_MODE_8023AD)) {
 		// Not Applicable
-		count = sprintf(buf, "NA\n") + 1;
+		count = sprintf(buf, "NA\n");
 	} else {
 		count = sprintf(buf, "%s %d\n",
 			xmit_hashtype_tbl[bond->params.xmit_policy].modename,
-			bond->params.xmit_policy) + 1;
+			bond->params.xmit_policy);
 	}
 
 	return count;
@@ -527,7 +525,7 @@ static ssize_t bonding_show_arp_validate(struct device *d,
 
 	return sprintf(buf, "%s %d\n",
 		       arp_validate_tbl[bond->params.arp_validate].modename,
-		       bond->params.arp_validate) + 1;
+		       bond->params.arp_validate);
 }
 
 static ssize_t bonding_store_arp_validate(struct device *d,
@@ -627,7 +625,7 @@ static ssize_t bonding_show_arp_interval(struct device *d,
 {
 	struct bonding *bond = to_bond(d);
 
-	return sprintf(buf, "%d\n", bond->params.arp_interval) + 1;
+	return sprintf(buf, "%d\n", bond->params.arp_interval);
 }
 
 static ssize_t bonding_store_arp_interval(struct device *d,
@@ -711,10 +709,7 @@ static ssize_t bonding_show_arp_targets(struct device *d,
 			res += sprintf(buf + res, "%u.%u.%u.%u ",
 			       NIPQUAD(bond->params.arp_targets[i]));
 	}
-	if (res)
-		res--;  /* eat the leftover space */
-	res += sprintf(buf + res, "\n");
-	res++;
+	if (res) buf[res-1] = '\n'; /* eat the leftover space */
 	return res;
 }
 
@@ -815,7 +810,7 @@ static ssize_t bonding_show_downdelay(struct device *d,
 {
 	struct bonding *bond = to_bond(d);
 
-	return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon) + 1;
+	return sprintf(buf, "%d\n", bond->params.downdelay * bond->params.miimon);
 }
 
 static ssize_t bonding_store_downdelay(struct device *d,
@@ -872,7 +867,7 @@ static ssize_t bonding_show_updelay(struct device *d,
 {
 	struct bonding *bond = to_bond(d);
 
-	return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon) + 1;
+	return sprintf(buf, "%d\n", bond->params.updelay * bond->params.miimon);
 
 }
 
@@ -936,7 +931,7 @@ static ssize_t bonding_show_lacp(struct device *d,
 
 	return sprintf(buf, "%s %d\n",
 		bond_lacp_tbl[bond->params.lacp_fast].modename,
-		bond->params.lacp_fast) + 1;
+		bond->params.lacp_fast);
 }
 
 static ssize_t bonding_store_lacp(struct device *d,
@@ -992,7 +987,7 @@ static ssize_t bonding_show_miimon(struct device *d,
 {
 	struct bonding *bond = to_bond(d);
 
-	return sprintf(buf, "%d\n", bond->params.miimon) + 1;
+	return sprintf(buf, "%d\n", bond->params.miimon);
 }
 
 static ssize_t bonding_store_miimon(struct device *d,
@@ -1083,9 +1078,9 @@ static ssize_t bonding_show_primary(struct device *d,
 	struct bonding *bond = to_bond(d);
 
 	if (bond->primary_slave)
-		count = sprintf(buf, "%s\n", bond->primary_slave->dev->name) + 1;
+		count = sprintf(buf, "%s\n", bond->primary_slave->dev->name);
 	else
-		count = sprintf(buf, "\n") + 1;
+		count = sprintf(buf, "\n");
 
 	return count;
 }
@@ -1149,7 +1144,7 @@ static ssize_t bonding_show_carrier(struct device *d,
 {
 	struct bonding *bond = to_bond(d);
 
-	return sprintf(buf, "%d\n", bond->params.use_carrier) + 1;
+	return sprintf(buf, "%d\n", bond->params.use_carrier);
 }
 
 static ssize_t bonding_store_carrier(struct device *d,
@@ -1198,9 +1193,9 @@ static ssize_t bonding_show_active_slave(struct device *d,
 	read_unlock(&bond->curr_slave_lock);
 
 	if (USES_PRIMARY(bond->params.mode) && curr)
-		count = sprintf(buf, "%s\n", curr->dev->name) + 1;
+		count = sprintf(buf, "%s\n", curr->dev->name);
 	else
-		count = sprintf(buf, "\n") + 1;
+		count = sprintf(buf, "\n");
 	return count;
 }
 
@@ -1295,7 +1290,7 @@ static ssize_t bonding_show_mii_status(struct device *d,
 	curr = bond->curr_active_slave;
 	read_unlock(&bond->curr_slave_lock);
 
-	return sprintf(buf, "%s\n", (curr) ? "up" : "down") + 1;
+	return sprintf(buf, "%s\n", (curr) ? "up" : "down");
 }
 static DEVICE_ATTR(mii_status, S_IRUGO, bonding_show_mii_status, NULL);
 
@@ -1312,10 +1307,10 @@ static ssize_t bonding_show_ad_aggregator(struct device *d,
 
 	if (bond->params.mode == BOND_MODE_8023AD) {
 		struct ad_info ad_info;
-		count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id) + 1;
+		count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.aggregator_id);
 	}
 	else
-		count = sprintf(buf, "\n") + 1;
+		count = sprintf(buf, "\n");
 
 	return count;
 }
@@ -1334,10 +1329,10 @@ static ssize_t bonding_show_ad_num_ports(struct device *d,
 
 	if (bond->params.mode == BOND_MODE_8023AD) {
 		struct ad_info ad_info;
-		count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports) + 1;
+		count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0: ad_info.ports);
 	}
 	else
-		count = sprintf(buf, "\n") + 1;
+		count = sprintf(buf, "\n");
 
 	return count;
 }
@@ -1356,10 +1351,10 @@ static ssize_t bonding_show_ad_actor_key(struct device *d,
 
 	if (bond->params.mode == BOND_MODE_8023AD) {
 		struct ad_info ad_info;
-		count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key) + 1;
+		count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.actor_key);
 	}
 	else
-		count = sprintf(buf, "\n") + 1;
+		count = sprintf(buf, "\n");
 
 	return count;
 }
@@ -1378,10 +1373,10 @@ static ssize_t bonding_show_ad_partner_key(struct device *d,
 
 	if (bond->params.mode == BOND_MODE_8023AD) {
 		struct ad_info ad_info;
-		count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key) + 1;
+		count = sprintf(buf, "%d\n", (bond_3ad_get_active_agg_info(bond, &ad_info)) ?  0 : ad_info.partner_key);
 	}
 	else
-		count = sprintf(buf, "\n") + 1;
+		count = sprintf(buf, "\n");
 
 	return count;
 }
@@ -1403,12 +1398,11 @@ static ssize_t bonding_show_ad_partner_mac(struct device *d,
 		struct ad_info ad_info;
 		if (!bond_3ad_get_active_agg_info(bond, &ad_info)) {
 			count = sprintf(buf,"%s\n",
-					print_mac(mac, ad_info.partner_system))
-				+ 1;
+					print_mac(mac, ad_info.partner_system));
 		}
 	}
 	else
-		count = sprintf(buf, "\n") + 1;
+		count = sprintf(buf, "\n");
 
 	return count;
 }
-- 
1.4.4.4


         reply	other threads:[~2007-11-28  0:50 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-28  0:52 [PATCH 2/3] net/bonding: Return nothing for not applicable values =?utf-8?q?Ferenc_W=C3=A1gner?=
2007-11-28  0:49 ` =?utf-8?q?Ferenc_W=C3=A1gner?= [this message]
2007-11-28  3:49   ` [PATCH 1/3] Remove trailing NULs from network bonding sysfs interface Randy Dunlap
2007-11-28  8:47     ` Wagner Ferenc
2007-11-28 15:38       ` Randy Dunlap
2007-11-29  0:16         ` [PATCH 4/3] net/bonding: Adhere to coding style: break line after the if condition =?utf-8?q?Ferenc_W=C3=A1gner?=
2007-11-29  1:01           ` Randy Dunlap
2007-11-29  1:13 ` [PATCH 2/3] net/bonding: Return nothing for not applicable values Jay Vosburgh
2007-12-02 12:42   ` [PATCH 1/5] Remove trailing NULs from network bonding sysfs interface Wagner Ferenc
2007-12-02 13:09   ` [PATCH 2/5] net/bonding: Return nothing for not applicable values Wagner Ferenc
2007-12-02 13:09   ` [PATCH 3/5] net/bonding: Purely cosmetic: rename a local variable Wagner Ferenc
2007-12-02 13:10   ` [PATCH 4/5] net/bonding: Adhere to coding style: break line after the if condition Wagner Ferenc
2007-12-02 13:11   ` [PATCH 5/5] net/bonding: Allow setting and querying xmit policy regardless of mode Wagner Ferenc

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